Version:  2.0.40 2.2.26 2.4.37 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18

Linux/drivers/net/ethernet/sun/niu.c

  1 /* niu.c: Neptune ethernet driver.
  2  *
  3  * Copyright (C) 2007, 2008 David S. Miller (davem@davemloft.net)
  4  */
  5 
  6 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  7 
  8 #include <linux/module.h>
  9 #include <linux/init.h>
 10 #include <linux/interrupt.h>
 11 #include <linux/pci.h>
 12 #include <linux/dma-mapping.h>
 13 #include <linux/netdevice.h>
 14 #include <linux/ethtool.h>
 15 #include <linux/etherdevice.h>
 16 #include <linux/platform_device.h>
 17 #include <linux/delay.h>
 18 #include <linux/bitops.h>
 19 #include <linux/mii.h>
 20 #include <linux/if.h>
 21 #include <linux/if_ether.h>
 22 #include <linux/if_vlan.h>
 23 #include <linux/ip.h>
 24 #include <linux/in.h>
 25 #include <linux/ipv6.h>
 26 #include <linux/log2.h>
 27 #include <linux/jiffies.h>
 28 #include <linux/crc32.h>
 29 #include <linux/list.h>
 30 #include <linux/slab.h>
 31 
 32 #include <linux/io.h>
 33 #include <linux/of_device.h>
 34 
 35 #include "niu.h"
 36 
 37 #define DRV_MODULE_NAME         "niu"
 38 #define DRV_MODULE_VERSION      "1.1"
 39 #define DRV_MODULE_RELDATE      "Apr 22, 2010"
 40 
 41 static char version[] =
 42         DRV_MODULE_NAME ".c:v" DRV_MODULE_VERSION " (" DRV_MODULE_RELDATE ")\n";
 43 
 44 MODULE_AUTHOR("David S. Miller (davem@davemloft.net)");
 45 MODULE_DESCRIPTION("NIU ethernet driver");
 46 MODULE_LICENSE("GPL");
 47 MODULE_VERSION(DRV_MODULE_VERSION);
 48 
 49 #ifndef readq
 50 static u64 readq(void __iomem *reg)
 51 {
 52         return ((u64) readl(reg)) | (((u64) readl(reg + 4UL)) << 32);
 53 }
 54 
 55 static void writeq(u64 val, void __iomem *reg)
 56 {
 57         writel(val & 0xffffffff, reg);
 58         writel(val >> 32, reg + 0x4UL);
 59 }
 60 #endif
 61 
 62 static const struct pci_device_id niu_pci_tbl[] = {
 63         {PCI_DEVICE(PCI_VENDOR_ID_SUN, 0xabcd)},
 64         {}
 65 };
 66 
 67 MODULE_DEVICE_TABLE(pci, niu_pci_tbl);
 68 
 69 #define NIU_TX_TIMEOUT                  (5 * HZ)
 70 
 71 #define nr64(reg)               readq(np->regs + (reg))
 72 #define nw64(reg, val)          writeq((val), np->regs + (reg))
 73 
 74 #define nr64_mac(reg)           readq(np->mac_regs + (reg))
 75 #define nw64_mac(reg, val)      writeq((val), np->mac_regs + (reg))
 76 
 77 #define nr64_ipp(reg)           readq(np->regs + np->ipp_off + (reg))
 78 #define nw64_ipp(reg, val)      writeq((val), np->regs + np->ipp_off + (reg))
 79 
 80 #define nr64_pcs(reg)           readq(np->regs + np->pcs_off + (reg))
 81 #define nw64_pcs(reg, val)      writeq((val), np->regs + np->pcs_off + (reg))
 82 
 83 #define nr64_xpcs(reg)          readq(np->regs + np->xpcs_off + (reg))
 84 #define nw64_xpcs(reg, val)     writeq((val), np->regs + np->xpcs_off + (reg))
 85 
 86 #define NIU_MSG_DEFAULT (NETIF_MSG_DRV | NETIF_MSG_PROBE | NETIF_MSG_LINK)
 87 
 88 static int niu_debug;
 89 static int debug = -1;
 90 module_param(debug, int, 0);
 91 MODULE_PARM_DESC(debug, "NIU debug level");
 92 
 93 #define niu_lock_parent(np, flags) \
 94         spin_lock_irqsave(&np->parent->lock, flags)
 95 #define niu_unlock_parent(np, flags) \
 96         spin_unlock_irqrestore(&np->parent->lock, flags)
 97 
 98 static int serdes_init_10g_serdes(struct niu *np);
 99 
100 static int __niu_wait_bits_clear_mac(struct niu *np, unsigned long reg,
101                                      u64 bits, int limit, int delay)
102 {
103         while (--limit >= 0) {
104                 u64 val = nr64_mac(reg);
105 
106                 if (!(val & bits))
107                         break;
108                 udelay(delay);
109         }
110         if (limit < 0)
111                 return -ENODEV;
112         return 0;
113 }
114 
115 static int __niu_set_and_wait_clear_mac(struct niu *np, unsigned long reg,
116                                         u64 bits, int limit, int delay,
117                                         const char *reg_name)
118 {
119         int err;
120 
121         nw64_mac(reg, bits);
122         err = __niu_wait_bits_clear_mac(np, reg, bits, limit, delay);
123         if (err)
124                 netdev_err(np->dev, "bits (%llx) of register %s would not clear, val[%llx]\n",
125                            (unsigned long long)bits, reg_name,
126                            (unsigned long long)nr64_mac(reg));
127         return err;
128 }
129 
130 #define niu_set_and_wait_clear_mac(NP, REG, BITS, LIMIT, DELAY, REG_NAME) \
131 ({      BUILD_BUG_ON(LIMIT <= 0 || DELAY < 0); \
132         __niu_set_and_wait_clear_mac(NP, REG, BITS, LIMIT, DELAY, REG_NAME); \
133 })
134 
135 static int __niu_wait_bits_clear_ipp(struct niu *np, unsigned long reg,
136                                      u64 bits, int limit, int delay)
137 {
138         while (--limit >= 0) {
139                 u64 val = nr64_ipp(reg);
140 
141                 if (!(val & bits))
142                         break;
143                 udelay(delay);
144         }
145         if (limit < 0)
146                 return -ENODEV;
147         return 0;
148 }
149 
150 static int __niu_set_and_wait_clear_ipp(struct niu *np, unsigned long reg,
151                                         u64 bits, int limit, int delay,
152                                         const char *reg_name)
153 {
154         int err;
155         u64 val;
156 
157         val = nr64_ipp(reg);
158         val |= bits;
159         nw64_ipp(reg, val);
160 
161         err = __niu_wait_bits_clear_ipp(np, reg, bits, limit, delay);
162         if (err)
163                 netdev_err(np->dev, "bits (%llx) of register %s would not clear, val[%llx]\n",
164                            (unsigned long long)bits, reg_name,
165                            (unsigned long long)nr64_ipp(reg));
166         return err;
167 }
168 
169 #define niu_set_and_wait_clear_ipp(NP, REG, BITS, LIMIT, DELAY, REG_NAME) \
170 ({      BUILD_BUG_ON(LIMIT <= 0 || DELAY < 0); \
171         __niu_set_and_wait_clear_ipp(NP, REG, BITS, LIMIT, DELAY, REG_NAME); \
172 })
173 
174 static int __niu_wait_bits_clear(struct niu *np, unsigned long reg,
175                                  u64 bits, int limit, int delay)
176 {
177         while (--limit >= 0) {
178                 u64 val = nr64(reg);
179 
180                 if (!(val & bits))
181                         break;
182                 udelay(delay);
183         }
184         if (limit < 0)
185                 return -ENODEV;
186         return 0;
187 }
188 
189 #define niu_wait_bits_clear(NP, REG, BITS, LIMIT, DELAY) \
190 ({      BUILD_BUG_ON(LIMIT <= 0 || DELAY < 0); \
191         __niu_wait_bits_clear(NP, REG, BITS, LIMIT, DELAY); \
192 })
193 
194 static int __niu_set_and_wait_clear(struct niu *np, unsigned long reg,
195                                     u64 bits, int limit, int delay,
196                                     const char *reg_name)
197 {
198         int err;
199 
200         nw64(reg, bits);
201         err = __niu_wait_bits_clear(np, reg, bits, limit, delay);
202         if (err)
203                 netdev_err(np->dev, "bits (%llx) of register %s would not clear, val[%llx]\n",
204                            (unsigned long long)bits, reg_name,
205                            (unsigned long long)nr64(reg));
206         return err;
207 }
208 
209 #define niu_set_and_wait_clear(NP, REG, BITS, LIMIT, DELAY, REG_NAME) \
210 ({      BUILD_BUG_ON(LIMIT <= 0 || DELAY < 0); \
211         __niu_set_and_wait_clear(NP, REG, BITS, LIMIT, DELAY, REG_NAME); \
212 })
213 
214 static void niu_ldg_rearm(struct niu *np, struct niu_ldg *lp, int on)
215 {
216         u64 val = (u64) lp->timer;
217 
218         if (on)
219                 val |= LDG_IMGMT_ARM;
220 
221         nw64(LDG_IMGMT(lp->ldg_num), val);
222 }
223 
224 static int niu_ldn_irq_enable(struct niu *np, int ldn, int on)
225 {
226         unsigned long mask_reg, bits;
227         u64 val;
228 
229         if (ldn < 0 || ldn > LDN_MAX)
230                 return -EINVAL;
231 
232         if (ldn < 64) {
233                 mask_reg = LD_IM0(ldn);
234                 bits = LD_IM0_MASK;
235         } else {
236                 mask_reg = LD_IM1(ldn - 64);
237                 bits = LD_IM1_MASK;
238         }
239 
240         val = nr64(mask_reg);
241         if (on)
242                 val &= ~bits;
243         else
244                 val |= bits;
245         nw64(mask_reg, val);
246 
247         return 0;
248 }
249 
250 static int niu_enable_ldn_in_ldg(struct niu *np, struct niu_ldg *lp, int on)
251 {
252         struct niu_parent *parent = np->parent;
253         int i;
254 
255         for (i = 0; i <= LDN_MAX; i++) {
256                 int err;
257 
258                 if (parent->ldg_map[i] != lp->ldg_num)
259                         continue;
260 
261                 err = niu_ldn_irq_enable(np, i, on);
262                 if (err)
263                         return err;
264         }
265         return 0;
266 }
267 
268 static int niu_enable_interrupts(struct niu *np, int on)
269 {
270         int i;
271 
272         for (i = 0; i < np->num_ldg; i++) {
273                 struct niu_ldg *lp = &np->ldg[i];
274                 int err;
275 
276                 err = niu_enable_ldn_in_ldg(np, lp, on);
277                 if (err)
278                         return err;
279         }
280         for (i = 0; i < np->num_ldg; i++)
281                 niu_ldg_rearm(np, &np->ldg[i], on);
282 
283         return 0;
284 }
285 
286 static u32 phy_encode(u32 type, int port)
287 {
288         return type << (port * 2);
289 }
290 
291 static u32 phy_decode(u32 val, int port)
292 {
293         return (val >> (port * 2)) & PORT_TYPE_MASK;
294 }
295 
296 static int mdio_wait(struct niu *np)
297 {
298         int limit = 1000;
299         u64 val;
300 
301         while (--limit > 0) {
302                 val = nr64(MIF_FRAME_OUTPUT);
303                 if ((val >> MIF_FRAME_OUTPUT_TA_SHIFT) & 0x1)
304                         return val & MIF_FRAME_OUTPUT_DATA;
305 
306                 udelay(10);
307         }
308 
309         return -ENODEV;
310 }
311 
312 static int mdio_read(struct niu *np, int port, int dev, int reg)
313 {
314         int err;
315 
316         nw64(MIF_FRAME_OUTPUT, MDIO_ADDR_OP(port, dev, reg));
317         err = mdio_wait(np);
318         if (err < 0)
319                 return err;
320 
321         nw64(MIF_FRAME_OUTPUT, MDIO_READ_OP(port, dev));
322         return mdio_wait(np);
323 }
324 
325 static int mdio_write(struct niu *np, int port, int dev, int reg, int data)
326 {
327         int err;
328 
329         nw64(MIF_FRAME_OUTPUT, MDIO_ADDR_OP(port, dev, reg));
330         err = mdio_wait(np);
331         if (err < 0)
332                 return err;
333 
334         nw64(MIF_FRAME_OUTPUT, MDIO_WRITE_OP(port, dev, data));
335         err = mdio_wait(np);
336         if (err < 0)
337                 return err;
338 
339         return 0;
340 }
341 
342 static int mii_read(struct niu *np, int port, int reg)
343 {
344         nw64(MIF_FRAME_OUTPUT, MII_READ_OP(port, reg));
345         return mdio_wait(np);
346 }
347 
348 static int mii_write(struct niu *np, int port, int reg, int data)
349 {
350         int err;
351 
352         nw64(MIF_FRAME_OUTPUT, MII_WRITE_OP(port, reg, data));
353         err = mdio_wait(np);
354         if (err < 0)
355                 return err;
356 
357         return 0;
358 }
359 
360 static int esr2_set_tx_cfg(struct niu *np, unsigned long channel, u32 val)
361 {
362         int err;
363 
364         err = mdio_write(np, np->port, NIU_ESR2_DEV_ADDR,
365                          ESR2_TI_PLL_TX_CFG_L(channel),
366                          val & 0xffff);
367         if (!err)
368                 err = mdio_write(np, np->port, NIU_ESR2_DEV_ADDR,
369                                  ESR2_TI_PLL_TX_CFG_H(channel),
370                                  val >> 16);
371         return err;
372 }
373 
374 static int esr2_set_rx_cfg(struct niu *np, unsigned long channel, u32 val)
375 {
376         int err;
377 
378         err = mdio_write(np, np->port, NIU_ESR2_DEV_ADDR,
379                          ESR2_TI_PLL_RX_CFG_L(channel),
380                          val & 0xffff);
381         if (!err)
382                 err = mdio_write(np, np->port, NIU_ESR2_DEV_ADDR,
383                                  ESR2_TI_PLL_RX_CFG_H(channel),
384                                  val >> 16);
385         return err;
386 }
387 
388 /* Mode is always 10G fiber.  */
389 static int serdes_init_niu_10g_fiber(struct niu *np)
390 {
391         struct niu_link_config *lp = &np->link_config;
392         u32 tx_cfg, rx_cfg;
393         unsigned long i;
394 
395         tx_cfg = (PLL_TX_CFG_ENTX | PLL_TX_CFG_SWING_1375MV);
396         rx_cfg = (PLL_RX_CFG_ENRX | PLL_RX_CFG_TERM_0P8VDDT |
397                   PLL_RX_CFG_ALIGN_ENA | PLL_RX_CFG_LOS_LTHRESH |
398                   PLL_RX_CFG_EQ_LP_ADAPTIVE);
399 
400         if (lp->loopback_mode == LOOPBACK_PHY) {
401                 u16 test_cfg = PLL_TEST_CFG_LOOPBACK_CML_DIS;
402 
403                 mdio_write(np, np->port, NIU_ESR2_DEV_ADDR,
404                            ESR2_TI_PLL_TEST_CFG_L, test_cfg);
405 
406                 tx_cfg |= PLL_TX_CFG_ENTEST;
407                 rx_cfg |= PLL_RX_CFG_ENTEST;
408         }
409 
410         /* Initialize all 4 lanes of the SERDES.  */
411         for (i = 0; i < 4; i++) {
412                 int err = esr2_set_tx_cfg(np, i, tx_cfg);
413                 if (err)
414                         return err;
415         }
416 
417         for (i = 0; i < 4; i++) {
418                 int err = esr2_set_rx_cfg(np, i, rx_cfg);
419                 if (err)
420                         return err;
421         }
422 
423         return 0;
424 }
425 
426 static int serdes_init_niu_1g_serdes(struct niu *np)
427 {
428         struct niu_link_config *lp = &np->link_config;
429         u16 pll_cfg, pll_sts;
430         int max_retry = 100;
431         u64 uninitialized_var(sig), mask, val;
432         u32 tx_cfg, rx_cfg;
433         unsigned long i;
434         int err;
435 
436         tx_cfg = (PLL_TX_CFG_ENTX | PLL_TX_CFG_SWING_1375MV |
437                   PLL_TX_CFG_RATE_HALF);
438         rx_cfg = (PLL_RX_CFG_ENRX | PLL_RX_CFG_TERM_0P8VDDT |
439                   PLL_RX_CFG_ALIGN_ENA | PLL_RX_CFG_LOS_LTHRESH |
440                   PLL_RX_CFG_RATE_HALF);
441 
442         if (np->port == 0)
443                 rx_cfg |= PLL_RX_CFG_EQ_LP_ADAPTIVE;
444 
445         if (lp->loopback_mode == LOOPBACK_PHY) {
446                 u16 test_cfg = PLL_TEST_CFG_LOOPBACK_CML_DIS;
447 
448                 mdio_write(np, np->port, NIU_ESR2_DEV_ADDR,
449                            ESR2_TI_PLL_TEST_CFG_L, test_cfg);
450 
451                 tx_cfg |= PLL_TX_CFG_ENTEST;
452                 rx_cfg |= PLL_RX_CFG_ENTEST;
453         }
454 
455         /* Initialize PLL for 1G */
456         pll_cfg = (PLL_CFG_ENPLL | PLL_CFG_MPY_8X);
457 
458         err = mdio_write(np, np->port, NIU_ESR2_DEV_ADDR,
459                          ESR2_TI_PLL_CFG_L, pll_cfg);
460         if (err) {
461                 netdev_err(np->dev, "NIU Port %d %s() mdio write to ESR2_TI_PLL_CFG_L failed\n",
462                            np->port, __func__);
463                 return err;
464         }
465 
466         pll_sts = PLL_CFG_ENPLL;
467 
468         err = mdio_write(np, np->port, NIU_ESR2_DEV_ADDR,
469                          ESR2_TI_PLL_STS_L, pll_sts);
470         if (err) {
471                 netdev_err(np->dev, "NIU Port %d %s() mdio write to ESR2_TI_PLL_STS_L failed\n",
472                            np->port, __func__);
473                 return err;
474         }
475 
476         udelay(200);
477 
478         /* Initialize all 4 lanes of the SERDES.  */
479         for (i = 0; i < 4; i++) {
480                 err = esr2_set_tx_cfg(np, i, tx_cfg);
481                 if (err)
482                         return err;
483         }
484 
485         for (i = 0; i < 4; i++) {
486                 err = esr2_set_rx_cfg(np, i, rx_cfg);
487                 if (err)
488                         return err;
489         }
490 
491         switch (np->port) {
492         case 0:
493                 val = (ESR_INT_SRDY0_P0 | ESR_INT_DET0_P0);
494                 mask = val;
495                 break;
496 
497         case 1:
498                 val = (ESR_INT_SRDY0_P1 | ESR_INT_DET0_P1);
499                 mask = val;
500                 break;
501 
502         default:
503                 return -EINVAL;
504         }
505 
506         while (max_retry--) {
507                 sig = nr64(ESR_INT_SIGNALS);
508                 if ((sig & mask) == val)
509                         break;
510 
511                 mdelay(500);
512         }
513 
514         if ((sig & mask) != val) {
515                 netdev_err(np->dev, "Port %u signal bits [%08x] are not [%08x]\n",
516                            np->port, (int)(sig & mask), (int)val);
517                 return -ENODEV;
518         }
519 
520         return 0;
521 }
522 
523 static int serdes_init_niu_10g_serdes(struct niu *np)
524 {
525         struct niu_link_config *lp = &np->link_config;
526         u32 tx_cfg, rx_cfg, pll_cfg, pll_sts;
527         int max_retry = 100;
528         u64 uninitialized_var(sig), mask, val;
529         unsigned long i;
530         int err;
531 
532         tx_cfg = (PLL_TX_CFG_ENTX | PLL_TX_CFG_SWING_1375MV);
533         rx_cfg = (PLL_RX_CFG_ENRX | PLL_RX_CFG_TERM_0P8VDDT |
534                   PLL_RX_CFG_ALIGN_ENA | PLL_RX_CFG_LOS_LTHRESH |
535                   PLL_RX_CFG_EQ_LP_ADAPTIVE);
536 
537         if (lp->loopback_mode == LOOPBACK_PHY) {
538                 u16 test_cfg = PLL_TEST_CFG_LOOPBACK_CML_DIS;
539 
540                 mdio_write(np, np->port, NIU_ESR2_DEV_ADDR,
541                            ESR2_TI_PLL_TEST_CFG_L, test_cfg);
542 
543                 tx_cfg |= PLL_TX_CFG_ENTEST;
544                 rx_cfg |= PLL_RX_CFG_ENTEST;
545         }
546 
547         /* Initialize PLL for 10G */
548         pll_cfg = (PLL_CFG_ENPLL | PLL_CFG_MPY_10X);
549 
550         err = mdio_write(np, np->port, NIU_ESR2_DEV_ADDR,
551                          ESR2_TI_PLL_CFG_L, pll_cfg & 0xffff);
552         if (err) {
553                 netdev_err(np->dev, "NIU Port %d %s() mdio write to ESR2_TI_PLL_CFG_L failed\n",
554                            np->port, __func__);
555                 return err;
556         }
557 
558         pll_sts = PLL_CFG_ENPLL;
559 
560         err = mdio_write(np, np->port, NIU_ESR2_DEV_ADDR,
561                          ESR2_TI_PLL_STS_L, pll_sts & 0xffff);
562         if (err) {
563                 netdev_err(np->dev, "NIU Port %d %s() mdio write to ESR2_TI_PLL_STS_L failed\n",
564                            np->port, __func__);
565                 return err;
566         }
567 
568         udelay(200);
569 
570         /* Initialize all 4 lanes of the SERDES.  */
571         for (i = 0; i < 4; i++) {
572                 err = esr2_set_tx_cfg(np, i, tx_cfg);
573                 if (err)
574                         return err;
575         }
576 
577         for (i = 0; i < 4; i++) {
578                 err = esr2_set_rx_cfg(np, i, rx_cfg);
579                 if (err)
580                         return err;
581         }
582 
583         /* check if serdes is ready */
584 
585         switch (np->port) {
586         case 0:
587                 mask = ESR_INT_SIGNALS_P0_BITS;
588                 val = (ESR_INT_SRDY0_P0 |
589                        ESR_INT_DET0_P0 |
590                        ESR_INT_XSRDY_P0 |
591                        ESR_INT_XDP_P0_CH3 |
592                        ESR_INT_XDP_P0_CH2 |
593                        ESR_INT_XDP_P0_CH1 |
594                        ESR_INT_XDP_P0_CH0);
595                 break;
596 
597         case 1:
598                 mask = ESR_INT_SIGNALS_P1_BITS;
599                 val = (ESR_INT_SRDY0_P1 |
600                        ESR_INT_DET0_P1 |
601                        ESR_INT_XSRDY_P1 |
602                        ESR_INT_XDP_P1_CH3 |
603                        ESR_INT_XDP_P1_CH2 |
604                        ESR_INT_XDP_P1_CH1 |
605                        ESR_INT_XDP_P1_CH0);
606                 break;
607 
608         default:
609                 return -EINVAL;
610         }
611 
612         while (max_retry--) {
613                 sig = nr64(ESR_INT_SIGNALS);
614                 if ((sig & mask) == val)
615                         break;
616 
617                 mdelay(500);
618         }
619 
620         if ((sig & mask) != val) {
621                 pr_info("NIU Port %u signal bits [%08x] are not [%08x] for 10G...trying 1G\n",
622                         np->port, (int)(sig & mask), (int)val);
623 
624                 /* 10G failed, try initializing at 1G */
625                 err = serdes_init_niu_1g_serdes(np);
626                 if (!err) {
627                         np->flags &= ~NIU_FLAGS_10G;
628                         np->mac_xcvr = MAC_XCVR_PCS;
629                 }  else {
630                         netdev_err(np->dev, "Port %u 10G/1G SERDES Link Failed\n",
631                                    np->port);
632                         return -ENODEV;
633                 }
634         }
635         return 0;
636 }
637 
638 static int esr_read_rxtx_ctrl(struct niu *np, unsigned long chan, u32 *val)
639 {
640         int err;
641 
642         err = mdio_read(np, np->port, NIU_ESR_DEV_ADDR, ESR_RXTX_CTRL_L(chan));
643         if (err >= 0) {
644                 *val = (err & 0xffff);
645                 err = mdio_read(np, np->port, NIU_ESR_DEV_ADDR,
646                                 ESR_RXTX_CTRL_H(chan));
647                 if (err >= 0)
648                         *val |= ((err & 0xffff) << 16);
649                 err = 0;
650         }
651         return err;
652 }
653 
654 static int esr_read_glue0(struct niu *np, unsigned long chan, u32 *val)
655 {
656         int err;
657 
658         err = mdio_read(np, np->port, NIU_ESR_DEV_ADDR,
659                         ESR_GLUE_CTRL0_L(chan));
660         if (err >= 0) {
661                 *val = (err & 0xffff);
662                 err = mdio_read(np, np->port, NIU_ESR_DEV_ADDR,
663                                 ESR_GLUE_CTRL0_H(chan));
664                 if (err >= 0) {
665                         *val |= ((err & 0xffff) << 16);
666                         err = 0;
667                 }
668         }
669         return err;
670 }
671 
672 static int esr_read_reset(struct niu *np, u32 *val)
673 {
674         int err;
675 
676         err = mdio_read(np, np->port, NIU_ESR_DEV_ADDR,
677                         ESR_RXTX_RESET_CTRL_L);
678         if (err >= 0) {
679                 *val = (err & 0xffff);
680                 err = mdio_read(np, np->port, NIU_ESR_DEV_ADDR,
681                                 ESR_RXTX_RESET_CTRL_H);
682                 if (err >= 0) {
683                         *val |= ((err & 0xffff) << 16);
684                         err = 0;
685                 }
686         }
687         return err;
688 }
689 
690 static int esr_write_rxtx_ctrl(struct niu *np, unsigned long chan, u32 val)
691 {
692         int err;
693 
694         err = mdio_write(np, np->port, NIU_ESR_DEV_ADDR,
695                          ESR_RXTX_CTRL_L(chan), val & 0xffff);
696         if (!err)
697                 err = mdio_write(np, np->port, NIU_ESR_DEV_ADDR,
698                                  ESR_RXTX_CTRL_H(chan), (val >> 16));
699         return err;
700 }
701 
702 static int esr_write_glue0(struct niu *np, unsigned long chan, u32 val)
703 {
704         int err;
705 
706         err = mdio_write(np, np->port, NIU_ESR_DEV_ADDR,
707                         ESR_GLUE_CTRL0_L(chan), val & 0xffff);
708         if (!err)
709                 err = mdio_write(np, np->port, NIU_ESR_DEV_ADDR,
710                                  ESR_GLUE_CTRL0_H(chan), (val >> 16));
711         return err;
712 }
713 
714 static int esr_reset(struct niu *np)
715 {
716         u32 uninitialized_var(reset);
717         int err;
718 
719         err = mdio_write(np, np->port, NIU_ESR_DEV_ADDR,
720                          ESR_RXTX_RESET_CTRL_L, 0x0000);
721         if (err)
722                 return err;
723         err = mdio_write(np, np->port, NIU_ESR_DEV_ADDR,
724                          ESR_RXTX_RESET_CTRL_H, 0xffff);
725         if (err)
726                 return err;
727         udelay(200);
728 
729         err = mdio_write(np, np->port, NIU_ESR_DEV_ADDR,
730                          ESR_RXTX_RESET_CTRL_L, 0xffff);
731         if (err)
732                 return err;
733         udelay(200);
734 
735         err = mdio_write(np, np->port, NIU_ESR_DEV_ADDR,
736                          ESR_RXTX_RESET_CTRL_H, 0x0000);
737         if (err)
738                 return err;
739         udelay(200);
740 
741         err = esr_read_reset(np, &reset);
742         if (err)
743                 return err;
744         if (reset != 0) {
745                 netdev_err(np->dev, "Port %u ESR_RESET did not clear [%08x]\n",
746                            np->port, reset);
747                 return -ENODEV;
748         }
749 
750         return 0;
751 }
752 
753 static int serdes_init_10g(struct niu *np)
754 {
755         struct niu_link_config *lp = &np->link_config;
756         unsigned long ctrl_reg, test_cfg_reg, i;
757         u64 ctrl_val, test_cfg_val, sig, mask, val;
758         int err;
759 
760         switch (np->port) {
761         case 0:
762                 ctrl_reg = ENET_SERDES_0_CTRL_CFG;
763                 test_cfg_reg = ENET_SERDES_0_TEST_CFG;
764                 break;
765         case 1:
766                 ctrl_reg = ENET_SERDES_1_CTRL_CFG;
767                 test_cfg_reg = ENET_SERDES_1_TEST_CFG;
768                 break;
769 
770         default:
771                 return -EINVAL;
772         }
773         ctrl_val = (ENET_SERDES_CTRL_SDET_0 |
774                     ENET_SERDES_CTRL_SDET_1 |
775                     ENET_SERDES_CTRL_SDET_2 |
776                     ENET_SERDES_CTRL_SDET_3 |
777                     (0x5 << ENET_SERDES_CTRL_EMPH_0_SHIFT) |
778                     (0x5 << ENET_SERDES_CTRL_EMPH_1_SHIFT) |
779                     (0x5 << ENET_SERDES_CTRL_EMPH_2_SHIFT) |
780                     (0x5 << ENET_SERDES_CTRL_EMPH_3_SHIFT) |
781                     (0x1 << ENET_SERDES_CTRL_LADJ_0_SHIFT) |
782                     (0x1 << ENET_SERDES_CTRL_LADJ_1_SHIFT) |
783                     (0x1 << ENET_SERDES_CTRL_LADJ_2_SHIFT) |
784                     (0x1 << ENET_SERDES_CTRL_LADJ_3_SHIFT));
785         test_cfg_val = 0;
786 
787         if (lp->loopback_mode == LOOPBACK_PHY) {
788                 test_cfg_val |= ((ENET_TEST_MD_PAD_LOOPBACK <<
789                                   ENET_SERDES_TEST_MD_0_SHIFT) |
790                                  (ENET_TEST_MD_PAD_LOOPBACK <<
791                                   ENET_SERDES_TEST_MD_1_SHIFT) |
792                                  (ENET_TEST_MD_PAD_LOOPBACK <<
793                                   ENET_SERDES_TEST_MD_2_SHIFT) |
794                                  (ENET_TEST_MD_PAD_LOOPBACK <<
795                                   ENET_SERDES_TEST_MD_3_SHIFT));
796         }
797 
798         nw64(ctrl_reg, ctrl_val);
799         nw64(test_cfg_reg, test_cfg_val);
800 
801         /* Initialize all 4 lanes of the SERDES.  */
802         for (i = 0; i < 4; i++) {
803                 u32 rxtx_ctrl, glue0;
804 
805                 err = esr_read_rxtx_ctrl(np, i, &rxtx_ctrl);
806                 if (err)
807                         return err;
808                 err = esr_read_glue0(np, i, &glue0);
809                 if (err)
810                         return err;
811 
812                 rxtx_ctrl &= ~(ESR_RXTX_CTRL_VMUXLO);
813                 rxtx_ctrl |= (ESR_RXTX_CTRL_ENSTRETCH |
814                               (2 << ESR_RXTX_CTRL_VMUXLO_SHIFT));
815 
816                 glue0 &= ~(ESR_GLUE_CTRL0_SRATE |
817                            ESR_GLUE_CTRL0_THCNT |
818                            ESR_GLUE_CTRL0_BLTIME);
819                 glue0 |= (ESR_GLUE_CTRL0_RXLOSENAB |
820                           (0xf << ESR_GLUE_CTRL0_SRATE_SHIFT) |
821                           (0xff << ESR_GLUE_CTRL0_THCNT_SHIFT) |
822                           (BLTIME_300_CYCLES <<
823                            ESR_GLUE_CTRL0_BLTIME_SHIFT));
824 
825                 err = esr_write_rxtx_ctrl(np, i, rxtx_ctrl);
826                 if (err)
827                         return err;
828                 err = esr_write_glue0(np, i, glue0);
829                 if (err)
830                         return err;
831         }
832 
833         err = esr_reset(np);
834         if (err)
835                 return err;
836 
837         sig = nr64(ESR_INT_SIGNALS);
838         switch (np->port) {
839         case 0:
840                 mask = ESR_INT_SIGNALS_P0_BITS;
841                 val = (ESR_INT_SRDY0_P0 |
842                        ESR_INT_DET0_P0 |
843                        ESR_INT_XSRDY_P0 |
844                        ESR_INT_XDP_P0_CH3 |
845                        ESR_INT_XDP_P0_CH2 |
846                        ESR_INT_XDP_P0_CH1 |
847                        ESR_INT_XDP_P0_CH0);
848                 break;
849 
850         case 1:
851                 mask = ESR_INT_SIGNALS_P1_BITS;
852                 val = (ESR_INT_SRDY0_P1 |
853                        ESR_INT_DET0_P1 |
854                        ESR_INT_XSRDY_P1 |
855                        ESR_INT_XDP_P1_CH3 |
856                        ESR_INT_XDP_P1_CH2 |
857                        ESR_INT_XDP_P1_CH1 |
858                        ESR_INT_XDP_P1_CH0);
859                 break;
860 
861         default:
862                 return -EINVAL;
863         }
864 
865         if ((sig & mask) != val) {
866                 if (np->flags & NIU_FLAGS_HOTPLUG_PHY) {
867                         np->flags &= ~NIU_FLAGS_HOTPLUG_PHY_PRESENT;
868                         return 0;
869                 }
870                 netdev_err(np->dev, "Port %u signal bits [%08x] are not [%08x]\n",
871                            np->port, (int)(sig & mask), (int)val);
872                 return -ENODEV;
873         }
874         if (np->flags & NIU_FLAGS_HOTPLUG_PHY)
875                 np->flags |= NIU_FLAGS_HOTPLUG_PHY_PRESENT;
876         return 0;
877 }
878 
879 static int serdes_init_1g(struct niu *np)
880 {
881         u64 val;
882 
883         val = nr64(ENET_SERDES_1_PLL_CFG);
884         val &= ~ENET_SERDES_PLL_FBDIV2;
885         switch (np->port) {
886         case 0:
887                 val |= ENET_SERDES_PLL_HRATE0;
888                 break;
889         case 1:
890                 val |= ENET_SERDES_PLL_HRATE1;
891                 break;
892         case 2:
893                 val |= ENET_SERDES_PLL_HRATE2;
894                 break;
895         case 3:
896                 val |= ENET_SERDES_PLL_HRATE3;
897                 break;
898         default:
899                 return -EINVAL;
900         }
901         nw64(ENET_SERDES_1_PLL_CFG, val);
902 
903         return 0;
904 }
905 
906 static int serdes_init_1g_serdes(struct niu *np)
907 {
908         struct niu_link_config *lp = &np->link_config;
909         unsigned long ctrl_reg, test_cfg_reg, pll_cfg, i;
910         u64 ctrl_val, test_cfg_val, sig, mask, val;
911         int err;
912         u64 reset_val, val_rd;
913 
914         val = ENET_SERDES_PLL_HRATE0 | ENET_SERDES_PLL_HRATE1 |
915                 ENET_SERDES_PLL_HRATE2 | ENET_SERDES_PLL_HRATE3 |
916                 ENET_SERDES_PLL_FBDIV0;
917         switch (np->port) {
918         case 0:
919                 reset_val =  ENET_SERDES_RESET_0;
920                 ctrl_reg = ENET_SERDES_0_CTRL_CFG;
921                 test_cfg_reg = ENET_SERDES_0_TEST_CFG;
922                 pll_cfg = ENET_SERDES_0_PLL_CFG;
923                 break;
924         case 1:
925                 reset_val =  ENET_SERDES_RESET_1;
926                 ctrl_reg = ENET_SERDES_1_CTRL_CFG;
927                 test_cfg_reg = ENET_SERDES_1_TEST_CFG;
928                 pll_cfg = ENET_SERDES_1_PLL_CFG;
929                 break;
930 
931         default:
932                 return -EINVAL;
933         }
934         ctrl_val = (ENET_SERDES_CTRL_SDET_0 |
935                     ENET_SERDES_CTRL_SDET_1 |
936                     ENET_SERDES_CTRL_SDET_2 |
937                     ENET_SERDES_CTRL_SDET_3 |
938                     (0x5 << ENET_SERDES_CTRL_EMPH_0_SHIFT) |
939                     (0x5 << ENET_SERDES_CTRL_EMPH_1_SHIFT) |
940                     (0x5 << ENET_SERDES_CTRL_EMPH_2_SHIFT) |
941                     (0x5 << ENET_SERDES_CTRL_EMPH_3_SHIFT) |
942                     (0x1 << ENET_SERDES_CTRL_LADJ_0_SHIFT) |
943                     (0x1 << ENET_SERDES_CTRL_LADJ_1_SHIFT) |
944                     (0x1 << ENET_SERDES_CTRL_LADJ_2_SHIFT) |
945                     (0x1 << ENET_SERDES_CTRL_LADJ_3_SHIFT));
946         test_cfg_val = 0;
947 
948         if (lp->loopback_mode == LOOPBACK_PHY) {
949                 test_cfg_val |= ((ENET_TEST_MD_PAD_LOOPBACK <<
950                                   ENET_SERDES_TEST_MD_0_SHIFT) |
951                                  (ENET_TEST_MD_PAD_LOOPBACK <<
952                                   ENET_SERDES_TEST_MD_1_SHIFT) |
953                                  (ENET_TEST_MD_PAD_LOOPBACK <<
954                                   ENET_SERDES_TEST_MD_2_SHIFT) |
955                                  (ENET_TEST_MD_PAD_LOOPBACK <<
956                                   ENET_SERDES_TEST_MD_3_SHIFT));
957         }
958 
959         nw64(ENET_SERDES_RESET, reset_val);
960         mdelay(20);
961         val_rd = nr64(ENET_SERDES_RESET);
962         val_rd &= ~reset_val;
963         nw64(pll_cfg, val);
964         nw64(ctrl_reg, ctrl_val);
965         nw64(test_cfg_reg, test_cfg_val);
966         nw64(ENET_SERDES_RESET, val_rd);
967         mdelay(2000);
968 
969         /* Initialize all 4 lanes of the SERDES.  */
970         for (i = 0; i < 4; i++) {
971                 u32 rxtx_ctrl, glue0;
972 
973                 err = esr_read_rxtx_ctrl(np, i, &rxtx_ctrl);
974                 if (err)
975                         return err;
976                 err = esr_read_glue0(np, i, &glue0);
977                 if (err)
978                         return err;
979 
980                 rxtx_ctrl &= ~(ESR_RXTX_CTRL_VMUXLO);
981                 rxtx_ctrl |= (ESR_RXTX_CTRL_ENSTRETCH |
982                               (2 << ESR_RXTX_CTRL_VMUXLO_SHIFT));
983 
984                 glue0 &= ~(ESR_GLUE_CTRL0_SRATE |
985                            ESR_GLUE_CTRL0_THCNT |
986                            ESR_GLUE_CTRL0_BLTIME);
987                 glue0 |= (ESR_GLUE_CTRL0_RXLOSENAB |
988                           (0xf << ESR_GLUE_CTRL0_SRATE_SHIFT) |
989                           (0xff << ESR_GLUE_CTRL0_THCNT_SHIFT) |
990                           (BLTIME_300_CYCLES <<
991                            ESR_GLUE_CTRL0_BLTIME_SHIFT));
992 
993                 err = esr_write_rxtx_ctrl(np, i, rxtx_ctrl);
994                 if (err)
995                         return err;
996                 err = esr_write_glue0(np, i, glue0);
997                 if (err)
998                         return err;
999         }
1000 
1001 
1002         sig = nr64(ESR_INT_SIGNALS);
1003         switch (np->port) {
1004         case 0:
1005                 val = (ESR_INT_SRDY0_P0 | ESR_INT_DET0_P0);
1006                 mask = val;
1007                 break;
1008 
1009         case 1:
1010                 val = (ESR_INT_SRDY0_P1 | ESR_INT_DET0_P1);
1011                 mask = val;
1012                 break;
1013 
1014         default:
1015                 return -EINVAL;
1016         }
1017 
1018         if ((sig & mask) != val) {
1019                 netdev_err(np->dev, "Port %u signal bits [%08x] are not [%08x]\n",
1020                            np->port, (int)(sig & mask), (int)val);
1021                 return -ENODEV;
1022         }
1023 
1024         return 0;
1025 }
1026 
1027 static int link_status_1g_serdes(struct niu *np, int *link_up_p)
1028 {
1029         struct niu_link_config *lp = &np->link_config;
1030         int link_up;
1031         u64 val;
1032         u16 current_speed;
1033         unsigned long flags;
1034         u8 current_duplex;
1035 
1036         link_up = 0;
1037         current_speed = SPEED_INVALID;
1038         current_duplex = DUPLEX_INVALID;
1039 
1040         spin_lock_irqsave(&np->lock, flags);
1041 
1042         val = nr64_pcs(PCS_MII_STAT);
1043 
1044         if (val & PCS_MII_STAT_LINK_STATUS) {
1045                 link_up = 1;
1046                 current_speed = SPEED_1000;
1047                 current_duplex = DUPLEX_FULL;
1048         }
1049 
1050         lp->active_speed = current_speed;
1051         lp->active_duplex = current_duplex;
1052         spin_unlock_irqrestore(&np->lock, flags);
1053 
1054         *link_up_p = link_up;
1055         return 0;
1056 }
1057 
1058 static int link_status_10g_serdes(struct niu *np, int *link_up_p)
1059 {
1060         unsigned long flags;
1061         struct niu_link_config *lp = &np->link_config;
1062         int link_up = 0;
1063         int link_ok = 1;
1064         u64 val, val2;
1065         u16 current_speed;
1066         u8 current_duplex;
1067 
1068         if (!(np->flags & NIU_FLAGS_10G))
1069                 return link_status_1g_serdes(np, link_up_p);
1070 
1071         current_speed = SPEED_INVALID;
1072         current_duplex = DUPLEX_INVALID;
1073         spin_lock_irqsave(&np->lock, flags);
1074 
1075         val = nr64_xpcs(XPCS_STATUS(0));
1076         val2 = nr64_mac(XMAC_INTER2);
1077         if (val2 & 0x01000000)
1078                 link_ok = 0;
1079 
1080         if ((val & 0x1000ULL) && link_ok) {
1081                 link_up = 1;
1082                 current_speed = SPEED_10000;
1083                 current_duplex = DUPLEX_FULL;
1084         }
1085         lp->active_speed = current_speed;
1086         lp->active_duplex = current_duplex;
1087         spin_unlock_irqrestore(&np->lock, flags);
1088         *link_up_p = link_up;
1089         return 0;
1090 }
1091 
1092 static int link_status_mii(struct niu *np, int *link_up_p)
1093 {
1094         struct niu_link_config *lp = &np->link_config;
1095         int err;
1096         int bmsr, advert, ctrl1000, stat1000, lpa, bmcr, estatus;
1097         int supported, advertising, active_speed, active_duplex;
1098 
1099         err = mii_read(np, np->phy_addr, MII_BMCR);
1100         if (unlikely(err < 0))
1101                 return err;
1102         bmcr = err;
1103 
1104         err = mii_read(np, np->phy_addr, MII_BMSR);
1105         if (unlikely(err < 0))
1106                 return err;
1107         bmsr = err;
1108 
1109         err = mii_read(np, np->phy_addr, MII_ADVERTISE);
1110         if (unlikely(err < 0))
1111                 return err;
1112         advert = err;
1113 
1114         err = mii_read(np, np->phy_addr, MII_LPA);
1115         if (unlikely(err < 0))
1116                 return err;
1117         lpa = err;
1118 
1119         if (likely(bmsr & BMSR_ESTATEN)) {
1120                 err = mii_read(np, np->phy_addr, MII_ESTATUS);
1121                 if (unlikely(err < 0))
1122                         return err;
1123                 estatus = err;
1124 
1125                 err = mii_read(np, np->phy_addr, MII_CTRL1000);
1126                 if (unlikely(err < 0))
1127                         return err;
1128                 ctrl1000 = err;
1129 
1130                 err = mii_read(np, np->phy_addr, MII_STAT1000);
1131                 if (unlikely(err < 0))
1132                         return err;
1133                 stat1000 = err;
1134         } else
1135                 estatus = ctrl1000 = stat1000 = 0;
1136 
1137         supported = 0;
1138         if (bmsr & BMSR_ANEGCAPABLE)
1139                 supported |= SUPPORTED_Autoneg;
1140         if (bmsr & BMSR_10HALF)
1141                 supported |= SUPPORTED_10baseT_Half;
1142         if (bmsr & BMSR_10FULL)
1143                 supported |= SUPPORTED_10baseT_Full;
1144         if (bmsr & BMSR_100HALF)
1145                 supported |= SUPPORTED_100baseT_Half;
1146         if (bmsr & BMSR_100FULL)
1147                 supported |= SUPPORTED_100baseT_Full;
1148         if (estatus & ESTATUS_1000_THALF)
1149                 supported |= SUPPORTED_1000baseT_Half;
1150         if (estatus & ESTATUS_1000_TFULL)
1151                 supported |= SUPPORTED_1000baseT_Full;
1152         lp->supported = supported;
1153 
1154         advertising = mii_adv_to_ethtool_adv_t(advert);
1155         advertising |= mii_ctrl1000_to_ethtool_adv_t(ctrl1000);
1156 
1157         if (bmcr & BMCR_ANENABLE) {
1158                 int neg, neg1000;
1159 
1160                 lp->active_autoneg = 1;
1161                 advertising |= ADVERTISED_Autoneg;
1162 
1163                 neg = advert & lpa;
1164                 neg1000 = (ctrl1000 << 2) & stat1000;
1165 
1166                 if (neg1000 & (LPA_1000FULL | LPA_1000HALF))
1167                         active_speed = SPEED_1000;
1168                 else if (neg & LPA_100)
1169                         active_speed = SPEED_100;
1170                 else if (neg & (LPA_10HALF | LPA_10FULL))
1171                         active_speed = SPEED_10;
1172                 else
1173                         active_speed = SPEED_INVALID;
1174 
1175                 if ((neg1000 & LPA_1000FULL) || (neg & LPA_DUPLEX))
1176                         active_duplex = DUPLEX_FULL;
1177                 else if (active_speed != SPEED_INVALID)
1178                         active_duplex = DUPLEX_HALF;
1179                 else
1180                         active_duplex = DUPLEX_INVALID;
1181         } else {
1182                 lp->active_autoneg = 0;
1183 
1184                 if ((bmcr & BMCR_SPEED1000) && !(bmcr & BMCR_SPEED100))
1185                         active_speed = SPEED_1000;
1186                 else if (bmcr & BMCR_SPEED100)
1187                         active_speed = SPEED_100;
1188                 else
1189                         active_speed = SPEED_10;
1190 
1191                 if (bmcr & BMCR_FULLDPLX)
1192                         active_duplex = DUPLEX_FULL;
1193                 else
1194                         active_duplex = DUPLEX_HALF;
1195         }
1196 
1197         lp->active_advertising = advertising;
1198         lp->active_speed = active_speed;
1199         lp->active_duplex = active_duplex;
1200         *link_up_p = !!(bmsr & BMSR_LSTATUS);
1201 
1202         return 0;
1203 }
1204 
1205 static int link_status_1g_rgmii(struct niu *np, int *link_up_p)
1206 {
1207         struct niu_link_config *lp = &np->link_config;
1208         u16 current_speed, bmsr;
1209         unsigned long flags;
1210         u8 current_duplex;
1211         int err, link_up;
1212 
1213         link_up = 0;
1214         current_speed = SPEED_INVALID;
1215         current_duplex = DUPLEX_INVALID;
1216 
1217         spin_lock_irqsave(&np->lock, flags);
1218 
1219         err = -EINVAL;
1220 
1221         err = mii_read(np, np->phy_addr, MII_BMSR);
1222         if (err < 0)
1223                 goto out;
1224 
1225         bmsr = err;
1226         if (bmsr & BMSR_LSTATUS) {
1227                 u16 adv, lpa;
1228 
1229                 err = mii_read(np, np->phy_addr, MII_ADVERTISE);
1230                 if (err < 0)
1231                         goto out;
1232                 adv = err;
1233 
1234                 err = mii_read(np, np->phy_addr, MII_LPA);
1235                 if (err < 0)
1236                         goto out;
1237                 lpa = err;
1238 
1239                 err = mii_read(np, np->phy_addr, MII_ESTATUS);
1240                 if (err < 0)
1241                         goto out;
1242                 link_up = 1;
1243                 current_speed = SPEED_1000;
1244                 current_duplex = DUPLEX_FULL;
1245 
1246         }
1247         lp->active_speed = current_speed;
1248         lp->active_duplex = current_duplex;
1249         err = 0;
1250 
1251 out:
1252         spin_unlock_irqrestore(&np->lock, flags);
1253 
1254         *link_up_p = link_up;
1255         return err;
1256 }
1257 
1258 static int link_status_1g(struct niu *np, int *link_up_p)
1259 {
1260         struct niu_link_config *lp = &np->link_config;
1261         unsigned long flags;
1262         int err;
1263 
1264         spin_lock_irqsave(&np->lock, flags);
1265 
1266         err = link_status_mii(np, link_up_p);
1267         lp->supported |= SUPPORTED_TP;
1268         lp->active_advertising |= ADVERTISED_TP;
1269 
1270         spin_unlock_irqrestore(&np->lock, flags);
1271         return err;
1272 }
1273 
1274 static int bcm8704_reset(struct niu *np)
1275 {
1276         int err, limit;
1277 
1278         err = mdio_read(np, np->phy_addr,
1279                         BCM8704_PHYXS_DEV_ADDR, MII_BMCR);
1280         if (err < 0 || err == 0xffff)
1281                 return err;
1282         err |= BMCR_RESET;
1283         err = mdio_write(np, np->phy_addr, BCM8704_PHYXS_DEV_ADDR,
1284                          MII_BMCR, err);
1285         if (err)
1286                 return err;
1287 
1288         limit = 1000;
1289         while (--limit >= 0) {
1290                 err = mdio_read(np, np->phy_addr,
1291                                 BCM8704_PHYXS_DEV_ADDR, MII_BMCR);
1292                 if (err < 0)
1293                         return err;
1294                 if (!(err & BMCR_RESET))
1295                         break;
1296         }
1297         if (limit < 0) {
1298                 netdev_err(np->dev, "Port %u PHY will not reset (bmcr=%04x)\n",
1299                            np->port, (err & 0xffff));
1300                 return -ENODEV;
1301         }
1302         return 0;
1303 }
1304 
1305 /* When written, certain PHY registers need to be read back twice
1306  * in order for the bits to settle properly.
1307  */
1308 static int bcm8704_user_dev3_readback(struct niu *np, int reg)
1309 {
1310         int err = mdio_read(np, np->phy_addr, BCM8704_USER_DEV3_ADDR, reg);
1311         if (err < 0)
1312                 return err;
1313         err = mdio_read(np, np->phy_addr, BCM8704_USER_DEV3_ADDR, reg);
1314         if (err < 0)
1315                 return err;
1316         return 0;
1317 }
1318 
1319 static int bcm8706_init_user_dev3(struct niu *np)
1320 {
1321         int err;
1322 
1323 
1324         err = mdio_read(np, np->phy_addr, BCM8704_USER_DEV3_ADDR,
1325                         BCM8704_USER_OPT_DIGITAL_CTRL);
1326         if (err < 0)
1327                 return err;
1328         err &= ~USER_ODIG_CTRL_GPIOS;
1329         err |= (0x3 << USER_ODIG_CTRL_GPIOS_SHIFT);
1330         err |=  USER_ODIG_CTRL_RESV2;
1331         err = mdio_write(np, np->phy_addr, BCM8704_USER_DEV3_ADDR,
1332                          BCM8704_USER_OPT_DIGITAL_CTRL, err);
1333         if (err)
1334                 return err;
1335 
1336         mdelay(1000);
1337 
1338         return 0;
1339 }
1340 
1341 static int bcm8704_init_user_dev3(struct niu *np)
1342 {
1343         int err;
1344 
1345         err = mdio_write(np, np->phy_addr,
1346                          BCM8704_USER_DEV3_ADDR, BCM8704_USER_CONTROL,
1347                          (USER_CONTROL_OPTXRST_LVL |
1348                           USER_CONTROL_OPBIASFLT_LVL |
1349                           USER_CONTROL_OBTMPFLT_LVL |
1350                           USER_CONTROL_OPPRFLT_LVL |
1351                           USER_CONTROL_OPTXFLT_LVL |
1352                           USER_CONTROL_OPRXLOS_LVL |
1353                           USER_CONTROL_OPRXFLT_LVL |
1354                           USER_CONTROL_OPTXON_LVL |
1355                           (0x3f << USER_CONTROL_RES1_SHIFT)));
1356         if (err)
1357                 return err;
1358 
1359         err = mdio_write(np, np->phy_addr,
1360                          BCM8704_USER_DEV3_ADDR, BCM8704_USER_PMD_TX_CONTROL,
1361                          (USER_PMD_TX_CTL_XFP_CLKEN |
1362                           (1 << USER_PMD_TX_CTL_TX_DAC_TXD_SH) |
1363                           (2 << USER_PMD_TX_CTL_TX_DAC_TXCK_SH) |
1364                           USER_PMD_TX_CTL_TSCK_LPWREN));
1365         if (err)
1366                 return err;
1367 
1368         err = bcm8704_user_dev3_readback(np, BCM8704_USER_CONTROL);
1369         if (err)
1370                 return err;
1371         err = bcm8704_user_dev3_readback(np, BCM8704_USER_PMD_TX_CONTROL);
1372         if (err)
1373                 return err;
1374 
1375         err = mdio_read(np, np->phy_addr, BCM8704_USER_DEV3_ADDR,
1376                         BCM8704_USER_OPT_DIGITAL_CTRL);
1377         if (err < 0)
1378                 return err;
1379         err &= ~USER_ODIG_CTRL_GPIOS;
1380         err |= (0x3 << USER_ODIG_CTRL_GPIOS_SHIFT);
1381         err = mdio_write(np, np->phy_addr, BCM8704_USER_DEV3_ADDR,
1382                          BCM8704_USER_OPT_DIGITAL_CTRL, err);
1383         if (err)
1384                 return err;
1385 
1386         mdelay(1000);
1387 
1388         return 0;
1389 }
1390 
1391 static int mrvl88x2011_act_led(struct niu *np, int val)
1392 {
1393         int     err;
1394 
1395         err  = mdio_read(np, np->phy_addr, MRVL88X2011_USER_DEV2_ADDR,
1396                 MRVL88X2011_LED_8_TO_11_CTL);
1397         if (err < 0)
1398                 return err;
1399 
1400         err &= ~MRVL88X2011_LED(MRVL88X2011_LED_ACT,MRVL88X2011_LED_CTL_MASK);
1401         err |=  MRVL88X2011_LED(MRVL88X2011_LED_ACT,val);
1402 
1403         return mdio_write(np, np->phy_addr, MRVL88X2011_USER_DEV2_ADDR,
1404                           MRVL88X2011_LED_8_TO_11_CTL, err);
1405 }
1406 
1407 static int mrvl88x2011_led_blink_rate(struct niu *np, int rate)
1408 {
1409         int     err;
1410 
1411         err = mdio_read(np, np->phy_addr, MRVL88X2011_USER_DEV2_ADDR,
1412                         MRVL88X2011_LED_BLINK_CTL);
1413         if (err >= 0) {
1414                 err &= ~MRVL88X2011_LED_BLKRATE_MASK;
1415                 err |= (rate << 4);
1416 
1417                 err = mdio_write(np, np->phy_addr, MRVL88X2011_USER_DEV2_ADDR,
1418                                  MRVL88X2011_LED_BLINK_CTL, err);
1419         }
1420 
1421         return err;
1422 }
1423 
1424 static int xcvr_init_10g_mrvl88x2011(struct niu *np)
1425 {
1426         int     err;
1427 
1428         /* Set LED functions */
1429         err = mrvl88x2011_led_blink_rate(np, MRVL88X2011_LED_BLKRATE_134MS);
1430         if (err)
1431                 return err;
1432 
1433         /* led activity */
1434         err = mrvl88x2011_act_led(np, MRVL88X2011_LED_CTL_OFF);
1435         if (err)
1436                 return err;
1437 
1438         err = mdio_read(np, np->phy_addr, MRVL88X2011_USER_DEV3_ADDR,
1439                         MRVL88X2011_GENERAL_CTL);
1440         if (err < 0)
1441                 return err;
1442 
1443         err |= MRVL88X2011_ENA_XFPREFCLK;
1444 
1445         err = mdio_write(np, np->phy_addr, MRVL88X2011_USER_DEV3_ADDR,
1446                          MRVL88X2011_GENERAL_CTL, err);
1447         if (err < 0)
1448                 return err;
1449 
1450         err = mdio_read(np, np->phy_addr, MRVL88X2011_USER_DEV1_ADDR,
1451                         MRVL88X2011_PMA_PMD_CTL_1);
1452         if (err < 0)
1453                 return err;
1454 
1455         if (np->link_config.loopback_mode == LOOPBACK_MAC)
1456                 err |= MRVL88X2011_LOOPBACK;
1457         else
1458                 err &= ~MRVL88X2011_LOOPBACK;
1459 
1460         err = mdio_write(np, np->phy_addr, MRVL88X2011_USER_DEV1_ADDR,
1461                          MRVL88X2011_PMA_PMD_CTL_1, err);
1462         if (err < 0)
1463                 return err;
1464 
1465         /* Enable PMD  */
1466         return mdio_write(np, np->phy_addr, MRVL88X2011_USER_DEV1_ADDR,
1467                           MRVL88X2011_10G_PMD_TX_DIS, MRVL88X2011_ENA_PMDTX);
1468 }
1469 
1470 
1471 static int xcvr_diag_bcm870x(struct niu *np)
1472 {
1473         u16 analog_stat0, tx_alarm_status;
1474         int err = 0;
1475 
1476 #if 1
1477         err = mdio_read(np, np->phy_addr, BCM8704_PMA_PMD_DEV_ADDR,
1478                         MII_STAT1000);
1479         if (err < 0)
1480                 return err;
1481         pr_info("Port %u PMA_PMD(MII_STAT1000) [%04x]\n", np->port, err);
1482 
1483         err = mdio_read(np, np->phy_addr, BCM8704_USER_DEV3_ADDR, 0x20);
1484         if (err < 0)
1485                 return err;
1486         pr_info("Port %u USER_DEV3(0x20) [%04x]\n", np->port, err);
1487 
1488         err = mdio_read(np, np->phy_addr, BCM8704_PHYXS_DEV_ADDR,
1489                         MII_NWAYTEST);
1490         if (err < 0)
1491                 return err;
1492         pr_info("Port %u PHYXS(MII_NWAYTEST) [%04x]\n", np->port, err);
1493 #endif
1494 
1495         /* XXX dig this out it might not be so useful XXX */
1496         err = mdio_read(np, np->phy_addr, BCM8704_USER_DEV3_ADDR,
1497                         BCM8704_USER_ANALOG_STATUS0);
1498         if (err < 0)
1499                 return err;
1500         err = mdio_read(np, np->phy_addr, BCM8704_USER_DEV3_ADDR,
1501                         BCM8704_USER_ANALOG_STATUS0);
1502         if (err < 0)
1503                 return err;
1504         analog_stat0 = err;
1505 
1506         err = mdio_read(np, np->phy_addr, BCM8704_USER_DEV3_ADDR,
1507                         BCM8704_USER_TX_ALARM_STATUS);
1508         if (err < 0)
1509                 return err;
1510         err = mdio_read(np, np->phy_addr, BCM8704_USER_DEV3_ADDR,
1511                         BCM8704_USER_TX_ALARM_STATUS);
1512         if (err < 0)
1513                 return err;
1514         tx_alarm_status = err;
1515 
1516         if (analog_stat0 != 0x03fc) {
1517                 if ((analog_stat0 == 0x43bc) && (tx_alarm_status != 0)) {
1518                         pr_info("Port %u cable not connected or bad cable\n",
1519                                 np->port);
1520                 } else if (analog_stat0 == 0x639c) {
1521                         pr_info("Port %u optical module is bad or missing\n",
1522                                 np->port);
1523                 }
1524         }
1525 
1526         return 0;
1527 }
1528 
1529 static int xcvr_10g_set_lb_bcm870x(struct niu *np)
1530 {
1531         struct niu_link_config *lp = &np->link_config;
1532         int err;
1533 
1534         err = mdio_read(np, np->phy_addr, BCM8704_PCS_DEV_ADDR,
1535                         MII_BMCR);
1536         if (err < 0)
1537                 return err;
1538 
1539         err &= ~BMCR_LOOPBACK;
1540 
1541         if (lp->loopback_mode == LOOPBACK_MAC)
1542                 err |= BMCR_LOOPBACK;
1543 
1544         err = mdio_write(np, np->phy_addr, BCM8704_PCS_DEV_ADDR,
1545                          MII_BMCR, err);
1546         if (err)
1547                 return err;
1548 
1549         return 0;
1550 }
1551 
1552 static int xcvr_init_10g_bcm8706(struct niu *np)
1553 {
1554         int err = 0;
1555         u64 val;
1556 
1557         if ((np->flags & NIU_FLAGS_HOTPLUG_PHY) &&
1558             (np->flags & NIU_FLAGS_HOTPLUG_PHY_PRESENT) == 0)
1559                         return err;
1560 
1561         val = nr64_mac(XMAC_CONFIG);
1562         val &= ~XMAC_CONFIG_LED_POLARITY;
1563         val |= XMAC_CONFIG_FORCE_LED_ON;
1564         nw64_mac(XMAC_CONFIG, val);
1565 
1566         val = nr64(MIF_CONFIG);
1567         val |= MIF_CONFIG_INDIRECT_MODE;
1568         nw64(MIF_CONFIG, val);
1569 
1570         err = bcm8704_reset(np);
1571         if (err)
1572                 return err;
1573 
1574         err = xcvr_10g_set_lb_bcm870x(np);
1575         if (err)
1576                 return err;
1577 
1578         err = bcm8706_init_user_dev3(np);
1579         if (err)
1580                 return err;
1581 
1582         err = xcvr_diag_bcm870x(np);
1583         if (err)
1584                 return err;
1585 
1586         return 0;
1587 }
1588 
1589 static int xcvr_init_10g_bcm8704(struct niu *np)
1590 {
1591         int err;
1592 
1593         err = bcm8704_reset(np);
1594         if (err)
1595                 return err;
1596 
1597         err = bcm8704_init_user_dev3(np);
1598         if (err)
1599                 return err;
1600 
1601         err = xcvr_10g_set_lb_bcm870x(np);
1602         if (err)
1603                 return err;
1604 
1605         err =  xcvr_diag_bcm870x(np);
1606         if (err)
1607                 return err;
1608 
1609         return 0;
1610 }
1611 
1612 static int xcvr_init_10g(struct niu *np)
1613 {
1614         int phy_id, err;
1615         u64 val;
1616 
1617         val = nr64_mac(XMAC_CONFIG);
1618         val &= ~XMAC_CONFIG_LED_POLARITY;
1619         val |= XMAC_CONFIG_FORCE_LED_ON;
1620         nw64_mac(XMAC_CONFIG, val);
1621 
1622         /* XXX shared resource, lock parent XXX */
1623         val = nr64(MIF_CONFIG);
1624         val |= MIF_CONFIG_INDIRECT_MODE;
1625         nw64(MIF_CONFIG, val);
1626 
1627         phy_id = phy_decode(np->parent->port_phy, np->port);
1628         phy_id = np->parent->phy_probe_info.phy_id[phy_id][np->port];
1629 
1630         /* handle different phy types */
1631         switch (phy_id & NIU_PHY_ID_MASK) {
1632         case NIU_PHY_ID_MRVL88X2011:
1633                 err = xcvr_init_10g_mrvl88x2011(np);
1634                 break;
1635 
1636         default: /* bcom 8704 */
1637                 err = xcvr_init_10g_bcm8704(np);
1638                 break;
1639         }
1640 
1641         return err;
1642 }
1643 
1644 static int mii_reset(struct niu *np)
1645 {
1646         int limit, err;
1647 
1648         err = mii_write(np, np->phy_addr, MII_BMCR, BMCR_RESET);
1649         if (err)
1650                 return err;
1651 
1652         limit = 1000;
1653         while (--limit >= 0) {
1654                 udelay(500);
1655                 err = mii_read(np, np->phy_addr, MII_BMCR);
1656                 if (err < 0)
1657                         return err;
1658                 if (!(err & BMCR_RESET))
1659                         break;
1660         }
1661         if (limit < 0) {
1662                 netdev_err(np->dev, "Port %u MII would not reset, bmcr[%04x]\n",
1663                            np->port, err);
1664                 return -ENODEV;
1665         }
1666 
1667         return 0;
1668 }
1669 
1670 static int xcvr_init_1g_rgmii(struct niu *np)
1671 {
1672         int err;
1673         u64 val;
1674         u16 bmcr, bmsr, estat;
1675 
1676         val = nr64(MIF_CONFIG);
1677         val &= ~MIF_CONFIG_INDIRECT_MODE;
1678         nw64(MIF_CONFIG, val);
1679 
1680         err = mii_reset(np);
1681         if (err)
1682                 return err;
1683 
1684         err = mii_read(np, np->phy_addr, MII_BMSR);
1685         if (err < 0)
1686                 return err;
1687         bmsr = err;
1688 
1689         estat = 0;
1690         if (bmsr & BMSR_ESTATEN) {
1691                 err = mii_read(np, np->phy_addr, MII_ESTATUS);
1692                 if (err < 0)
1693                         return err;
1694                 estat = err;
1695         }
1696 
1697         bmcr = 0;
1698         err = mii_write(np, np->phy_addr, MII_BMCR, bmcr);
1699         if (err)
1700                 return err;
1701 
1702         if (bmsr & BMSR_ESTATEN) {
1703                 u16 ctrl1000 = 0;
1704 
1705                 if (estat & ESTATUS_1000_TFULL)
1706                         ctrl1000 |= ADVERTISE_1000FULL;
1707                 err = mii_write(np, np->phy_addr, MII_CTRL1000, ctrl1000);
1708                 if (err)
1709                         return err;
1710         }
1711 
1712         bmcr = (BMCR_SPEED1000 | BMCR_FULLDPLX);
1713 
1714         err = mii_write(np, np->phy_addr, MII_BMCR, bmcr);
1715         if (err)
1716                 return err;
1717 
1718         err = mii_read(np, np->phy_addr, MII_BMCR);
1719         if (err < 0)
1720                 return err;
1721         bmcr = mii_read(np, np->phy_addr, MII_BMCR);
1722 
1723         err = mii_read(np, np->phy_addr, MII_BMSR);
1724         if (err < 0)
1725                 return err;
1726 
1727         return 0;
1728 }
1729 
1730 static int mii_init_common(struct niu *np)
1731 {
1732         struct niu_link_config *lp = &np->link_config;
1733         u16 bmcr, bmsr, adv, estat;
1734         int err;
1735 
1736         err = mii_reset(np);
1737         if (err)
1738                 return err;
1739 
1740         err = mii_read(np, np->phy_addr, MII_BMSR);
1741         if (err < 0)
1742                 return err;
1743         bmsr = err;
1744 
1745         estat = 0;
1746         if (bmsr & BMSR_ESTATEN) {
1747                 err = mii_read(np, np->phy_addr, MII_ESTATUS);
1748                 if (err < 0)
1749                         return err;
1750                 estat = err;
1751         }
1752 
1753         bmcr = 0;
1754         err = mii_write(np, np->phy_addr, MII_BMCR, bmcr);
1755         if (err)
1756                 return err;
1757 
1758         if (lp->loopback_mode == LOOPBACK_MAC) {
1759                 bmcr |= BMCR_LOOPBACK;
1760                 if (lp->active_speed == SPEED_1000)
1761                         bmcr |= BMCR_SPEED1000;
1762                 if (lp->active_duplex == DUPLEX_FULL)
1763                         bmcr |= BMCR_FULLDPLX;
1764         }
1765 
1766         if (lp->loopback_mode == LOOPBACK_PHY) {
1767                 u16 aux;
1768 
1769                 aux = (BCM5464R_AUX_CTL_EXT_LB |
1770                        BCM5464R_AUX_CTL_WRITE_1);
1771                 err = mii_write(np, np->phy_addr, BCM5464R_AUX_CTL, aux);
1772                 if (err)
1773                         return err;
1774         }
1775 
1776         if (lp->autoneg) {
1777                 u16 ctrl1000;
1778 
1779                 adv = ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP;
1780                 if ((bmsr & BMSR_10HALF) &&
1781                         (lp->advertising & ADVERTISED_10baseT_Half))
1782                         adv |= ADVERTISE_10HALF;
1783                 if ((bmsr & BMSR_10FULL) &&
1784                         (lp->advertising & ADVERTISED_10baseT_Full))
1785                         adv |= ADVERTISE_10FULL;
1786                 if ((bmsr & BMSR_100HALF) &&
1787                         (lp->advertising & ADVERTISED_100baseT_Half))
1788                         adv |= ADVERTISE_100HALF;
1789                 if ((bmsr & BMSR_100FULL) &&
1790                         (lp->advertising & ADVERTISED_100baseT_Full))
1791                         adv |= ADVERTISE_100FULL;
1792                 err = mii_write(np, np->phy_addr, MII_ADVERTISE, adv);
1793                 if (err)
1794                         return err;
1795 
1796                 if (likely(bmsr & BMSR_ESTATEN)) {
1797                         ctrl1000 = 0;
1798                         if ((estat & ESTATUS_1000_THALF) &&
1799                                 (lp->advertising & ADVERTISED_1000baseT_Half))
1800                                 ctrl1000 |= ADVERTISE_1000HALF;
1801                         if ((estat & ESTATUS_1000_TFULL) &&
1802                                 (lp->advertising & ADVERTISED_1000baseT_Full))
1803                                 ctrl1000 |= ADVERTISE_1000FULL;
1804                         err = mii_write(np, np->phy_addr,
1805                                         MII_CTRL1000, ctrl1000);
1806                         if (err)
1807                                 return err;
1808                 }
1809 
1810                 bmcr |= (BMCR_ANENABLE | BMCR_ANRESTART);
1811         } else {
1812                 /* !lp->autoneg */
1813                 int fulldpx;
1814 
1815                 if (lp->duplex == DUPLEX_FULL) {
1816                         bmcr |= BMCR_FULLDPLX;
1817                         fulldpx = 1;
1818                 } else if (lp->duplex == DUPLEX_HALF)
1819                         fulldpx = 0;
1820                 else
1821                         return -EINVAL;
1822 
1823                 if (lp->speed == SPEED_1000) {
1824                         /* if X-full requested while not supported, or
1825                            X-half requested while not supported... */
1826                         if ((fulldpx && !(estat & ESTATUS_1000_TFULL)) ||
1827                                 (!fulldpx && !(estat & ESTATUS_1000_THALF)))
1828                                 return -EINVAL;
1829                         bmcr |= BMCR_SPEED1000;
1830                 } else if (lp->speed == SPEED_100) {
1831                         if ((fulldpx && !(bmsr & BMSR_100FULL)) ||
1832                                 (!fulldpx && !(bmsr & BMSR_100HALF)))
1833                                 return -EINVAL;
1834                         bmcr |= BMCR_SPEED100;
1835                 } else if (lp->speed == SPEED_10) {
1836                         if ((fulldpx && !(bmsr & BMSR_10FULL)) ||
1837                                 (!fulldpx && !(bmsr & BMSR_10HALF)))
1838                                 return -EINVAL;
1839                 } else
1840                         return -EINVAL;
1841         }
1842 
1843         err = mii_write(np, np->phy_addr, MII_BMCR, bmcr);
1844         if (err)
1845                 return err;
1846 
1847 #if 0
1848         err = mii_read(np, np->phy_addr, MII_BMCR);
1849         if (err < 0)
1850                 return err;
1851         bmcr = err;
1852 
1853         err = mii_read(np, np->phy_addr, MII_BMSR);
1854         if (err < 0)
1855                 return err;
1856         bmsr = err;
1857 
1858         pr_info("Port %u after MII init bmcr[%04x] bmsr[%04x]\n",
1859                 np->port, bmcr, bmsr);
1860 #endif
1861 
1862         return 0;
1863 }
1864 
1865 static int xcvr_init_1g(struct niu *np)
1866 {
1867         u64 val;
1868 
1869         /* XXX shared resource, lock parent XXX */
1870         val = nr64(MIF_CONFIG);
1871         val &= ~MIF_CONFIG_INDIRECT_MODE;
1872         nw64(MIF_CONFIG, val);
1873 
1874         return mii_init_common(np);
1875 }
1876 
1877 static int niu_xcvr_init(struct niu *np)
1878 {
1879         const struct niu_phy_ops *ops = np->phy_ops;
1880         int err;
1881 
1882         err = 0;
1883         if (ops->xcvr_init)
1884                 err = ops->xcvr_init(np);
1885 
1886         return err;
1887 }
1888 
1889 static int niu_serdes_init(struct niu *np)
1890 {
1891         const struct niu_phy_ops *ops = np->phy_ops;
1892         int err;
1893 
1894         err = 0;
1895         if (ops->serdes_init)
1896                 err = ops->serdes_init(np);
1897 
1898         return err;
1899 }
1900 
1901 static void niu_init_xif(struct niu *);
1902 static void niu_handle_led(struct niu *, int status);
1903 
1904 static int niu_link_status_common(struct niu *np, int link_up)
1905 {
1906         struct niu_link_config *lp = &np->link_config;
1907         struct net_device *dev = np->dev;
1908         unsigned long flags;
1909 
1910         if (!netif_carrier_ok(dev) && link_up) {
1911                 netif_info(np, link, dev, "Link is up at %s, %s duplex\n",
1912                            lp->active_speed == SPEED_10000 ? "10Gb/sec" :
1913                            lp->active_speed == SPEED_1000 ? "1Gb/sec" :
1914                            lp->active_speed == SPEED_100 ? "100Mbit/sec" :
1915                            "10Mbit/sec",
1916                            lp->active_duplex == DUPLEX_FULL ? "full" : "half");
1917 
1918                 spin_lock_irqsave(&np->lock, flags);
1919                 niu_init_xif(np);
1920                 niu_handle_led(np, 1);
1921                 spin_unlock_irqrestore(&np->lock, flags);
1922 
1923                 netif_carrier_on(dev);
1924         } else if (netif_carrier_ok(dev) && !link_up) {
1925                 netif_warn(np, link, dev, "Link is down\n");
1926                 spin_lock_irqsave(&np->lock, flags);
1927                 niu_handle_led(np, 0);
1928                 spin_unlock_irqrestore(&np->lock, flags);
1929                 netif_carrier_off(dev);
1930         }
1931 
1932         return 0;
1933 }
1934 
1935 static int link_status_10g_mrvl(struct niu *np, int *link_up_p)
1936 {
1937         int err, link_up, pma_status, pcs_status;
1938 
1939         link_up = 0;
1940 
1941         err = mdio_read(np, np->phy_addr, MRVL88X2011_USER_DEV1_ADDR,
1942                         MRVL88X2011_10G_PMD_STATUS_2);
1943         if (err < 0)
1944                 goto out;
1945 
1946         /* Check PMA/PMD Register: 1.0001.2 == 1 */
1947         err = mdio_read(np, np->phy_addr, MRVL88X2011_USER_DEV1_ADDR,
1948                         MRVL88X2011_PMA_PMD_STATUS_1);
1949         if (err < 0)
1950                 goto out;
1951 
1952         pma_status = ((err & MRVL88X2011_LNK_STATUS_OK) ? 1 : 0);
1953 
1954         /* Check PMC Register : 3.0001.2 == 1: read twice */
1955         err = mdio_read(np, np->phy_addr, MRVL88X2011_USER_DEV3_ADDR,
1956                         MRVL88X2011_PMA_PMD_STATUS_1);
1957         if (err < 0)
1958                 goto out;
1959 
1960         err = mdio_read(np, np->phy_addr, MRVL88X2011_USER_DEV3_ADDR,
1961                         MRVL88X2011_PMA_PMD_STATUS_1);
1962         if (err < 0)
1963                 goto out;
1964 
1965         pcs_status = ((err & MRVL88X2011_LNK_STATUS_OK) ? 1 : 0);
1966 
1967         /* Check XGXS Register : 4.0018.[0-3,12] */
1968         err = mdio_read(np, np->phy_addr, MRVL88X2011_USER_DEV4_ADDR,
1969                         MRVL88X2011_10G_XGXS_LANE_STAT);
1970         if (err < 0)
1971                 goto out;
1972 
1973         if (err == (PHYXS_XGXS_LANE_STAT_ALINGED | PHYXS_XGXS_LANE_STAT_LANE3 |
1974                     PHYXS_XGXS_LANE_STAT_LANE2 | PHYXS_XGXS_LANE_STAT_LANE1 |
1975                     PHYXS_XGXS_LANE_STAT_LANE0 | PHYXS_XGXS_LANE_STAT_MAGIC |
1976                     0x800))
1977                 link_up = (pma_status && pcs_status) ? 1 : 0;
1978 
1979         np->link_config.active_speed = SPEED_10000;
1980         np->link_config.active_duplex = DUPLEX_FULL;
1981         err = 0;
1982 out:
1983         mrvl88x2011_act_led(np, (link_up ?
1984                                  MRVL88X2011_LED_CTL_PCS_ACT :
1985                                  MRVL88X2011_LED_CTL_OFF));
1986 
1987         *link_up_p = link_up;
1988         return err;
1989 }
1990 
1991 static int link_status_10g_bcm8706(struct niu *np, int *link_up_p)
1992 {
1993         int err, link_up;
1994         link_up = 0;
1995 
1996         err = mdio_read(np, np->phy_addr, BCM8704_PMA_PMD_DEV_ADDR,
1997                         BCM8704_PMD_RCV_SIGDET);
1998         if (err < 0 || err == 0xffff)
1999                 goto out;
2000         if (!(err & PMD_RCV_SIGDET_GLOBAL)) {
2001                 err = 0;
2002                 goto out;
2003         }
2004 
2005         err = mdio_read(np, np->phy_addr, BCM8704_PCS_DEV_ADDR,
2006                         BCM8704_PCS_10G_R_STATUS);
2007         if (err < 0)
2008                 goto out;
2009 
2010         if (!(err & PCS_10G_R_STATUS_BLK_LOCK)) {
2011                 err = 0;
2012                 goto out;
2013         }
2014 
2015         err = mdio_read(np, np->phy_addr, BCM8704_PHYXS_DEV_ADDR,
2016                         BCM8704_PHYXS_XGXS_LANE_STAT);
2017         if (err < 0)
2018                 goto out;
2019         if (err != (PHYXS_XGXS_LANE_STAT_ALINGED |
2020                     PHYXS_XGXS_LANE_STAT_MAGIC |
2021                     PHYXS_XGXS_LANE_STAT_PATTEST |
2022                     PHYXS_XGXS_LANE_STAT_LANE3 |
2023                     PHYXS_XGXS_LANE_STAT_LANE2 |
2024                     PHYXS_XGXS_LANE_STAT_LANE1 |
2025                     PHYXS_XGXS_LANE_STAT_LANE0)) {
2026                 err = 0;
2027                 np->link_config.active_speed = SPEED_INVALID;
2028                 np->link_config.active_duplex = DUPLEX_INVALID;
2029                 goto out;
2030         }
2031 
2032         link_up = 1;
2033         np->link_config.active_speed = SPEED_10000;
2034         np->link_config.active_duplex = DUPLEX_FULL;
2035         err = 0;
2036 
2037 out:
2038         *link_up_p = link_up;
2039         return err;
2040 }
2041 
2042 static int link_status_10g_bcom(struct niu *np, int *link_up_p)
2043 {
2044         int err, link_up;
2045 
2046         link_up = 0;
2047 
2048         err = mdio_read(np, np->phy_addr, BCM8704_PMA_PMD_DEV_ADDR,
2049                         BCM8704_PMD_RCV_SIGDET);
2050         if (err < 0)
2051                 goto out;
2052         if (!(err & PMD_RCV_SIGDET_GLOBAL)) {
2053                 err = 0;
2054                 goto out;
2055         }
2056 
2057         err = mdio_read(np, np->phy_addr, BCM8704_PCS_DEV_ADDR,
2058                         BCM8704_PCS_10G_R_STATUS);
2059         if (err < 0)
2060                 goto out;
2061         if (!(err & PCS_10G_R_STATUS_BLK_LOCK)) {
2062                 err = 0;
2063                 goto out;
2064         }
2065 
2066         err = mdio_read(np, np->phy_addr, BCM8704_PHYXS_DEV_ADDR,
2067                         BCM8704_PHYXS_XGXS_LANE_STAT);
2068         if (err < 0)
2069                 goto out;
2070 
2071         if (err != (PHYXS_XGXS_LANE_STAT_ALINGED |
2072                     PHYXS_XGXS_LANE_STAT_MAGIC |
2073                     PHYXS_XGXS_LANE_STAT_LANE3 |
2074                     PHYXS_XGXS_LANE_STAT_LANE2 |
2075                     PHYXS_XGXS_LANE_STAT_LANE1 |
2076                     PHYXS_XGXS_LANE_STAT_LANE0)) {
2077                 err = 0;
2078                 goto out;
2079         }
2080 
2081         link_up = 1;
2082         np->link_config.active_speed = SPEED_10000;
2083         np->link_config.active_duplex = DUPLEX_FULL;
2084         err = 0;
2085 
2086 out:
2087         *link_up_p = link_up;
2088         return err;
2089 }
2090 
2091 static int link_status_10g(struct niu *np, int *link_up_p)
2092 {
2093         unsigned long flags;
2094         int err = -EINVAL;
2095 
2096         spin_lock_irqsave(&np->lock, flags);
2097 
2098         if (np->link_config.loopback_mode == LOOPBACK_DISABLED) {
2099                 int phy_id;
2100 
2101                 phy_id = phy_decode(np->parent->port_phy, np->port);
2102                 phy_id = np->parent->phy_probe_info.phy_id[phy_id][np->port];
2103 
2104                 /* handle different phy types */
2105                 switch (phy_id & NIU_PHY_ID_MASK) {
2106                 case NIU_PHY_ID_MRVL88X2011:
2107                         err = link_status_10g_mrvl(np, link_up_p);
2108                         break;
2109 
2110                 default: /* bcom 8704 */
2111                         err = link_status_10g_bcom(np, link_up_p);
2112                         break;
2113                 }
2114         }
2115 
2116         spin_unlock_irqrestore(&np->lock, flags);
2117 
2118         return err;
2119 }
2120 
2121 static int niu_10g_phy_present(struct niu *np)
2122 {
2123         u64 sig, mask, val;
2124 
2125         sig = nr64(ESR_INT_SIGNALS);
2126         switch (np->port) {
2127         case 0:
2128                 mask = ESR_INT_SIGNALS_P0_BITS;
2129                 val = (ESR_INT_SRDY0_P0 |
2130                        ESR_INT_DET0_P0 |
2131                        ESR_INT_XSRDY_P0 |
2132                        ESR_INT_XDP_P0_CH3 |
2133                        ESR_INT_XDP_P0_CH2 |
2134                        ESR_INT_XDP_P0_CH1 |
2135                        ESR_INT_XDP_P0_CH0);
2136                 break;
2137 
2138         case 1:
2139                 mask = ESR_INT_SIGNALS_P1_BITS;
2140                 val = (ESR_INT_SRDY0_P1 |
2141                        ESR_INT_DET0_P1 |
2142                        ESR_INT_XSRDY_P1 |
2143                        ESR_INT_XDP_P1_CH3 |
2144                        ESR_INT_XDP_P1_CH2 |
2145                        ESR_INT_XDP_P1_CH1 |
2146                        ESR_INT_XDP_P1_CH0);
2147                 break;
2148 
2149         default:
2150                 return 0;
2151         }
2152 
2153         if ((sig & mask) != val)
2154                 return 0;
2155         return 1;
2156 }
2157 
2158 static int link_status_10g_hotplug(struct niu *np, int *link_up_p)
2159 {
2160         unsigned long flags;
2161         int err = 0;
2162         int phy_present;
2163         int phy_present_prev;
2164 
2165         spin_lock_irqsave(&np->lock, flags);
2166 
2167         if (np->link_config.loopback_mode == LOOPBACK_DISABLED) {
2168                 phy_present_prev = (np->flags & NIU_FLAGS_HOTPLUG_PHY_PRESENT) ?
2169                         1 : 0;
2170                 phy_present = niu_10g_phy_present(np);
2171                 if (phy_present != phy_present_prev) {
2172                         /* state change */
2173                         if (phy_present) {
2174                                 /* A NEM was just plugged in */
2175                                 np->flags |= NIU_FLAGS_HOTPLUG_PHY_PRESENT;
2176                                 if (np->phy_ops->xcvr_init)
2177                                         err = np->phy_ops->xcvr_init(np);
2178                                 if (err) {
2179                                         err = mdio_read(np, np->phy_addr,
2180                                                 BCM8704_PHYXS_DEV_ADDR, MII_BMCR);
2181                                         if (err == 0xffff) {
2182                                                 /* No mdio, back-to-back XAUI */
2183                                                 goto out;
2184                                         }
2185                                         /* debounce */
2186                                         np->flags &= ~NIU_FLAGS_HOTPLUG_PHY_PRESENT;
2187                                 }
2188                         } else {
2189                                 np->flags &= ~NIU_FLAGS_HOTPLUG_PHY_PRESENT;
2190                                 *link_up_p = 0;
2191                                 netif_warn(np, link, np->dev,
2192                                            "Hotplug PHY Removed\n");
2193                         }
2194                 }
2195 out:
2196                 if (np->flags & NIU_FLAGS_HOTPLUG_PHY_PRESENT) {
2197                         err = link_status_10g_bcm8706(np, link_up_p);
2198                         if (err == 0xffff) {
2199                                 /* No mdio, back-to-back XAUI: it is C10NEM */
2200                                 *link_up_p = 1;
2201                                 np->link_config.active_speed = SPEED_10000;
2202                                 np->link_config.active_duplex = DUPLEX_FULL;
2203                         }
2204                 }
2205         }
2206 
2207         spin_unlock_irqrestore(&np->lock, flags);
2208 
2209         return 0;
2210 }
2211 
2212 static int niu_link_status(struct niu *np, int *link_up_p)
2213 {
2214         const struct niu_phy_ops *ops = np->phy_ops;
2215         int err;
2216 
2217         err = 0;
2218         if (ops->link_status)
2219                 err = ops->link_status(np, link_up_p);
2220 
2221         return err;
2222 }
2223 
2224 static void niu_timer(unsigned long __opaque)
2225 {
2226         struct niu *np = (struct niu *) __opaque;
2227         unsigned long off;
2228         int err, link_up;
2229 
2230         err = niu_link_status(np, &link_up);
2231         if (!err)
2232                 niu_link_status_common(np, link_up);
2233 
2234         if (netif_carrier_ok(np->dev))
2235                 off = 5 * HZ;
2236         else
2237                 off = 1 * HZ;
2238         np->timer.expires = jiffies + off;
2239 
2240         add_timer(&np->timer);
2241 }
2242 
2243 static const struct niu_phy_ops phy_ops_10g_serdes = {
2244         .serdes_init            = serdes_init_10g_serdes,
2245         .link_status            = link_status_10g_serdes,
2246 };
2247 
2248 static const struct niu_phy_ops phy_ops_10g_serdes_niu = {
2249         .serdes_init            = serdes_init_niu_10g_serdes,
2250         .link_status            = link_status_10g_serdes,
2251 };
2252 
2253 static const struct niu_phy_ops phy_ops_1g_serdes_niu = {
2254         .serdes_init            = serdes_init_niu_1g_serdes,
2255         .link_status            = link_status_1g_serdes,
2256 };
2257 
2258 static const struct niu_phy_ops phy_ops_1g_rgmii = {
2259         .xcvr_init              = xcvr_init_1g_rgmii,
2260         .link_status            = link_status_1g_rgmii,
2261 };
2262 
2263 static const struct niu_phy_ops phy_ops_10g_fiber_niu = {
2264         .serdes_init            = serdes_init_niu_10g_fiber,
2265         .xcvr_init              = xcvr_init_10g,
2266         .link_status            = link_status_10g,
2267 };
2268 
2269 static const struct niu_phy_ops phy_ops_10g_fiber = {
2270         .serdes_init            = serdes_init_10g,
2271         .xcvr_init              = xcvr_init_10g,
2272         .link_status            = link_status_10g,
2273 };
2274 
2275 static const struct niu_phy_ops phy_ops_10g_fiber_hotplug = {
2276         .serdes_init            = serdes_init_10g,
2277         .xcvr_init              = xcvr_init_10g_bcm8706,
2278         .link_status            = link_status_10g_hotplug,
2279 };
2280 
2281 static const struct niu_phy_ops phy_ops_niu_10g_hotplug = {
2282         .serdes_init            = serdes_init_niu_10g_fiber,
2283         .xcvr_init              = xcvr_init_10g_bcm8706,
2284         .link_status            = link_status_10g_hotplug,
2285 };
2286 
2287 static const struct niu_phy_ops phy_ops_10g_copper = {
2288         .serdes_init            = serdes_init_10g,
2289         .link_status            = link_status_10g, /* XXX */
2290 };
2291 
2292 static const struct niu_phy_ops phy_ops_1g_fiber = {
2293         .serdes_init            = serdes_init_1g,
2294         .xcvr_init              = xcvr_init_1g,
2295         .link_status            = link_status_1g,
2296 };
2297 
2298 static const struct niu_phy_ops phy_ops_1g_copper = {
2299         .xcvr_init              = xcvr_init_1g,
2300         .link_status            = link_status_1g,
2301 };
2302 
2303 struct niu_phy_template {
2304         const struct niu_phy_ops        *ops;
2305         u32                             phy_addr_base;
2306 };
2307 
2308 static const struct niu_phy_template phy_template_niu_10g_fiber = {
2309         .ops            = &phy_ops_10g_fiber_niu,
2310         .phy_addr_base  = 16,
2311 };
2312 
2313 static const struct niu_phy_template phy_template_niu_10g_serdes = {
2314         .ops            = &phy_ops_10g_serdes_niu,
2315         .phy_addr_base  = 0,
2316 };
2317 
2318 static const struct niu_phy_template phy_template_niu_1g_serdes = {
2319         .ops            = &phy_ops_1g_serdes_niu,
2320         .phy_addr_base  = 0,
2321 };
2322 
2323 static const struct niu_phy_template phy_template_10g_fiber = {
2324         .ops            = &phy_ops_10g_fiber,
2325         .phy_addr_base  = 8,
2326 };
2327 
2328 static const struct niu_phy_template phy_template_10g_fiber_hotplug = {
2329         .ops            = &phy_ops_10g_fiber_hotplug,
2330         .phy_addr_base  = 8,
2331 };
2332 
2333 static const struct niu_phy_template phy_template_niu_10g_hotplug = {
2334         .ops            = &phy_ops_niu_10g_hotplug,
2335         .phy_addr_base  = 8,
2336 };
2337 
2338 static const struct niu_phy_template phy_template_10g_copper = {
2339         .ops            = &phy_ops_10g_copper,
2340         .phy_addr_base  = 10,
2341 };
2342 
2343 static const struct niu_phy_template phy_template_1g_fiber = {
2344         .ops            = &phy_ops_1g_fiber,
2345         .phy_addr_base  = 0,
2346 };
2347 
2348 static const struct niu_phy_template phy_template_1g_copper = {
2349         .ops            = &phy_ops_1g_copper,
2350         .phy_addr_base  = 0,
2351 };
2352 
2353 static const struct niu_phy_template phy_template_1g_rgmii = {
2354         .ops            = &phy_ops_1g_rgmii,
2355         .phy_addr_base  = 0,
2356 };
2357 
2358 static const struct niu_phy_template phy_template_10g_serdes = {
2359         .ops            = &phy_ops_10g_serdes,
2360         .phy_addr_base  = 0,
2361 };
2362 
2363 static int niu_atca_port_num[4] = {
2364         0, 0,  11, 10
2365 };
2366 
2367 static int serdes_init_10g_serdes(struct niu *np)
2368 {
2369         struct niu_link_config *lp = &np->link_config;
2370         unsigned long ctrl_reg, test_cfg_reg, pll_cfg, i;
2371         u64 ctrl_val, test_cfg_val, sig, mask, val;
2372 
2373         switch (np->port) {
2374         case 0:
2375                 ctrl_reg = ENET_SERDES_0_CTRL_CFG;
2376                 test_cfg_reg = ENET_SERDES_0_TEST_CFG;
2377                 pll_cfg = ENET_SERDES_0_PLL_CFG;
2378                 break;
2379         case 1:
2380                 ctrl_reg = ENET_SERDES_1_CTRL_CFG;
2381                 test_cfg_reg = ENET_SERDES_1_TEST_CFG;
2382                 pll_cfg = ENET_SERDES_1_PLL_CFG;
2383                 break;
2384 
2385         default:
2386                 return -EINVAL;
2387         }
2388         ctrl_val = (ENET_SERDES_CTRL_SDET_0 |
2389                     ENET_SERDES_CTRL_SDET_1 |
2390                     ENET_SERDES_CTRL_SDET_2 |
2391                     ENET_SERDES_CTRL_SDET_3 |
2392                     (0x5 << ENET_SERDES_CTRL_EMPH_0_SHIFT) |
2393                     (0x5 << ENET_SERDES_CTRL_EMPH_1_SHIFT) |
2394                     (0x5 << ENET_SERDES_CTRL_EMPH_2_SHIFT) |
2395                     (0x5 << ENET_SERDES_CTRL_EMPH_3_SHIFT) |
2396                     (0x1 << ENET_SERDES_CTRL_LADJ_0_SHIFT) |
2397                     (0x1 << ENET_SERDES_CTRL_LADJ_1_SHIFT) |
2398                     (0x1 << ENET_SERDES_CTRL_LADJ_2_SHIFT) |
2399                     (0x1 << ENET_SERDES_CTRL_LADJ_3_SHIFT));
2400         test_cfg_val = 0;
2401 
2402         if (lp->loopback_mode == LOOPBACK_PHY) {
2403                 test_cfg_val |= ((ENET_TEST_MD_PAD_LOOPBACK <<
2404                                   ENET_SERDES_TEST_MD_0_SHIFT) |
2405                                  (ENET_TEST_MD_PAD_LOOPBACK <<
2406                                   ENET_SERDES_TEST_MD_1_SHIFT) |
2407                                  (ENET_TEST_MD_PAD_LOOPBACK <<
2408                                   ENET_SERDES_TEST_MD_2_SHIFT) |
2409                                  (ENET_TEST_MD_PAD_LOOPBACK <<
2410                                   ENET_SERDES_TEST_MD_3_SHIFT));
2411         }
2412 
2413         esr_reset(np);
2414         nw64(pll_cfg, ENET_SERDES_PLL_FBDIV2);
2415         nw64(ctrl_reg, ctrl_val);
2416         nw64(test_cfg_reg, test_cfg_val);
2417 
2418         /* Initialize all 4 lanes of the SERDES.  */
2419         for (i = 0; i < 4; i++) {
2420                 u32 rxtx_ctrl, glue0;
2421                 int err;
2422 
2423                 err = esr_read_rxtx_ctrl(np, i, &rxtx_ctrl);
2424                 if (err)
2425                         return err;
2426                 err = esr_read_glue0(np, i, &glue0);
2427                 if (err)
2428                         return err;
2429 
2430                 rxtx_ctrl &= ~(ESR_RXTX_CTRL_VMUXLO);
2431                 rxtx_ctrl |= (ESR_RXTX_CTRL_ENSTRETCH |
2432                               (2 << ESR_RXTX_CTRL_VMUXLO_SHIFT));
2433 
2434                 glue0 &= ~(ESR_GLUE_CTRL0_SRATE |
2435                            ESR_GLUE_CTRL0_THCNT |
2436                            ESR_GLUE_CTRL0_BLTIME);
2437                 glue0 |= (ESR_GLUE_CTRL0_RXLOSENAB |
2438                           (0xf << ESR_GLUE_CTRL0_SRATE_SHIFT) |
2439                           (0xff << ESR_GLUE_CTRL0_THCNT_SHIFT) |
2440                           (BLTIME_300_CYCLES <<
2441                            ESR_GLUE_CTRL0_BLTIME_SHIFT));
2442 
2443                 err = esr_write_rxtx_ctrl(np, i, rxtx_ctrl);
2444                 if (err)
2445                         return err;
2446                 err = esr_write_glue0(np, i, glue0);
2447                 if (err)
2448                         return err;
2449         }
2450 
2451 
2452         sig = nr64(ESR_INT_SIGNALS);
2453         switch (np->port) {
2454         case 0:
2455                 mask = ESR_INT_SIGNALS_P0_BITS;
2456                 val = (ESR_INT_SRDY0_P0 |
2457                        ESR_INT_DET0_P0 |
2458                        ESR_INT_XSRDY_P0 |
2459                        ESR_INT_XDP_P0_CH3 |
2460                        ESR_INT_XDP_P0_CH2 |
2461                        ESR_INT_XDP_P0_CH1 |
2462                        ESR_INT_XDP_P0_CH0);
2463                 break;
2464 
2465         case 1:
2466                 mask = ESR_INT_SIGNALS_P1_BITS;
2467                 val = (ESR_INT_SRDY0_P1 |
2468                        ESR_INT_DET0_P1 |
2469                        ESR_INT_XSRDY_P1 |
2470                        ESR_INT_XDP_P1_CH3 |
2471                        ESR_INT_XDP_P1_CH2 |
2472                        ESR_INT_XDP_P1_CH1 |
2473                        ESR_INT_XDP_P1_CH0);
2474                 break;
2475 
2476         default:
2477                 return -EINVAL;
2478         }
2479 
2480         if ((sig & mask) != val) {
2481                 int err;
2482                 err = serdes_init_1g_serdes(np);
2483                 if (!err) {
2484                         np->flags &= ~NIU_FLAGS_10G;
2485                         np->mac_xcvr = MAC_XCVR_PCS;
2486                 }  else {
2487                         netdev_err(np->dev, "Port %u 10G/1G SERDES Link Failed\n",
2488                                    np->port);
2489                         return -ENODEV;
2490                 }
2491         }
2492 
2493         return 0;
2494 }
2495 
2496 static int niu_determine_phy_disposition(struct niu *np)
2497 {
2498         struct niu_parent *parent = np->parent;
2499         u8 plat_type = parent->plat_type;
2500         const struct niu_phy_template *tp;
2501         u32 phy_addr_off = 0;
2502 
2503         if (plat_type == PLAT_TYPE_NIU) {
2504                 switch (np->flags &
2505                         (NIU_FLAGS_10G |
2506                          NIU_FLAGS_FIBER |
2507                          NIU_FLAGS_XCVR_SERDES)) {
2508                 case NIU_FLAGS_10G | NIU_FLAGS_XCVR_SERDES:
2509                         /* 10G Serdes */
2510                         tp = &phy_template_niu_10g_serdes;
2511                         break;
2512                 case NIU_FLAGS_XCVR_SERDES:
2513                         /* 1G Serdes */
2514                         tp = &phy_template_niu_1g_serdes;
2515                         break;
2516                 case NIU_FLAGS_10G | NIU_FLAGS_FIBER:
2517                         /* 10G Fiber */
2518                 default:
2519                         if (np->flags & NIU_FLAGS_HOTPLUG_PHY) {
2520                                 tp = &phy_template_niu_10g_hotplug;
2521                                 if (np->port == 0)
2522                                         phy_addr_off = 8;
2523                                 if (np->port == 1)
2524                                         phy_addr_off = 12;
2525                         } else {
2526                                 tp = &phy_template_niu_10g_fiber;
2527                                 phy_addr_off += np->port;
2528                         }
2529                         break;
2530                 }
2531         } else {
2532                 switch (np->flags &
2533                         (NIU_FLAGS_10G |
2534                          NIU_FLAGS_FIBER |
2535                          NIU_FLAGS_XCVR_SERDES)) {
2536                 case 0:
2537                         /* 1G copper */
2538                         tp = &phy_template_1g_copper;
2539                         if (plat_type == PLAT_TYPE_VF_P0)
2540                                 phy_addr_off = 10;
2541                         else if (plat_type == PLAT_TYPE_VF_P1)
2542                                 phy_addr_off = 26;
2543 
2544                         phy_addr_off += (np->port ^ 0x3);
2545                         break;
2546 
2547                 case NIU_FLAGS_10G:
2548                         /* 10G copper */
2549                         tp = &phy_template_10g_copper;
2550                         break;
2551 
2552                 case NIU_FLAGS_FIBER:
2553                         /* 1G fiber */
2554                         tp = &phy_template_1g_fiber;
2555                         break;
2556 
2557                 case NIU_FLAGS_10G | NIU_FLAGS_FIBER:
2558                         /* 10G fiber */
2559                         tp = &phy_template_10g_fiber;
2560                         if (plat_type == PLAT_TYPE_VF_P0 ||
2561                             plat_type == PLAT_TYPE_VF_P1)
2562                                 phy_addr_off = 8;
2563                         phy_addr_off += np->port;
2564                         if (np->flags & NIU_FLAGS_HOTPLUG_PHY) {
2565                                 tp = &phy_template_10g_fiber_hotplug;
2566                                 if (np->port == 0)
2567                                         phy_addr_off = 8;
2568                                 if (np->port == 1)
2569                                         phy_addr_off = 12;
2570                         }
2571                         break;
2572 
2573                 case NIU_FLAGS_10G | NIU_FLAGS_XCVR_SERDES:
2574                 case NIU_FLAGS_XCVR_SERDES | NIU_FLAGS_FIBER:
2575                 case NIU_FLAGS_XCVR_SERDES:
2576                         switch(np->port) {
2577                         case 0:
2578                         case 1:
2579                                 tp = &phy_template_10g_serdes;
2580                                 break;
2581                         case 2:
2582                         case 3:
2583                                 tp = &phy_template_1g_rgmii;
2584                                 break;
2585                         default:
2586                                 return -EINVAL;
2587                         }
2588                         phy_addr_off = niu_atca_port_num[np->port];
2589                         break;
2590 
2591                 default:
2592                         return -EINVAL;
2593                 }
2594         }
2595 
2596         np->phy_ops = tp->ops;
2597         np->phy_addr = tp->phy_addr_base + phy_addr_off;
2598 
2599         return 0;
2600 }
2601 
2602 static int niu_init_link(struct niu *np)
2603 {
2604         struct niu_parent *parent = np->parent;
2605         int err, ignore;
2606 
2607         if (parent->plat_type == PLAT_TYPE_NIU) {
2608                 err = niu_xcvr_init(np);
2609                 if (err)
2610                         return err;
2611                 msleep(200);
2612         }
2613         err = niu_serdes_init(np);
2614         if (err && !(np->flags & NIU_FLAGS_HOTPLUG_PHY))
2615                 return err;
2616         msleep(200);
2617         err = niu_xcvr_init(np);
2618         if (!err || (np->flags & NIU_FLAGS_HOTPLUG_PHY))
2619                 niu_link_status(np, &ignore);
2620         return 0;
2621 }
2622 
2623 static void niu_set_primary_mac(struct niu *np, unsigned char *addr)
2624 {
2625         u16 reg0 = addr[4] << 8 | addr[5];
2626         u16 reg1 = addr[2] << 8 | addr[3];
2627         u16 reg2 = addr[0] << 8 | addr[1];
2628 
2629         if (np->flags & NIU_FLAGS_XMAC) {
2630                 nw64_mac(XMAC_ADDR0, reg0);
2631                 nw64_mac(XMAC_ADDR1, reg1);
2632                 nw64_mac(XMAC_ADDR2, reg2);
2633         } else {
2634                 nw64_mac(BMAC_ADDR0, reg0);
2635                 nw64_mac(BMAC_ADDR1, reg1);
2636                 nw64_mac(BMAC_ADDR2, reg2);
2637         }
2638 }
2639 
2640 static int niu_num_alt_addr(struct niu *np)
2641 {
2642         if (np->flags & NIU_FLAGS_XMAC)
2643                 return XMAC_NUM_ALT_ADDR;
2644         else
2645                 return BMAC_NUM_ALT_ADDR;
2646 }
2647 
2648 static int niu_set_alt_mac(struct niu *np, int index, unsigned char *addr)
2649 {
2650         u16 reg0 = addr[4] << 8 | addr[5];
2651         u16 reg1 = addr[2] << 8 | addr[3];
2652         u16 reg2 = addr[0] << 8 | addr[1];
2653 
2654         if (index >= niu_num_alt_addr(np))
2655                 return -EINVAL;
2656 
2657         if (np->flags & NIU_FLAGS_XMAC) {
2658                 nw64_mac(XMAC_ALT_ADDR0(index), reg0);
2659                 nw64_mac(XMAC_ALT_ADDR1(index), reg1);
2660                 nw64_mac(XMAC_ALT_ADDR2(index), reg2);
2661         } else {
2662                 nw64_mac(BMAC_ALT_ADDR0(index), reg0);
2663                 nw64_mac(BMAC_ALT_ADDR1(index), reg1);
2664                 nw64_mac(BMAC_ALT_ADDR2(index), reg2);
2665         }
2666 
2667         return 0;
2668 }
2669 
2670 static int niu_enable_alt_mac(struct niu *np, int index, int on)
2671 {
2672         unsigned long reg;
2673         u64 val, mask;
2674 
2675         if (index >= niu_num_alt_addr(np))
2676                 return -EINVAL;
2677 
2678         if (np->flags & NIU_FLAGS_XMAC) {
2679                 reg = XMAC_ADDR_CMPEN;
2680                 mask = 1 << index;
2681         } else {
2682                 reg = BMAC_ADDR_CMPEN;
2683                 mask = 1 << (index + 1);
2684         }
2685 
2686         val = nr64_mac(reg);
2687         if (on)
2688                 val |= mask;
2689         else
2690                 val &= ~mask;
2691         nw64_mac(reg, val);
2692 
2693         return 0;
2694 }
2695 
2696 static void __set_rdc_table_num_hw(struct niu *np, unsigned long reg,
2697                                    int num, int mac_pref)
2698 {
2699         u64 val = nr64_mac(reg);
2700         val &= ~(HOST_INFO_MACRDCTBLN | HOST_INFO_MPR);
2701         val |= num;
2702         if (mac_pref)
2703                 val |= HOST_INFO_MPR;
2704         nw64_mac(reg, val);
2705 }
2706 
2707 static int __set_rdc_table_num(struct niu *np,
2708                                int xmac_index, int bmac_index,
2709                                int rdc_table_num, int mac_pref)
2710 {
2711         unsigned long reg;
2712 
2713         if (rdc_table_num & ~HOST_INFO_MACRDCTBLN)
2714                 return -EINVAL;
2715         if (np->flags & NIU_FLAGS_XMAC)
2716                 reg = XMAC_HOST_INFO(xmac_index);
2717         else
2718                 reg = BMAC_HOST_INFO(bmac_index);
2719         __set_rdc_table_num_hw(np, reg, rdc_table_num, mac_pref);
2720         return 0;
2721 }
2722 
2723 static int niu_set_primary_mac_rdc_table(struct niu *np, int table_num,
2724                                          int mac_pref)
2725 {
2726         return __set_rdc_table_num(np, 17, 0, table_num, mac_pref);
2727 }
2728 
2729 static int niu_set_multicast_mac_rdc_table(struct niu *np, int table_num,
2730                                            int mac_pref)
2731 {
2732         return __set_rdc_table_num(np, 16, 8, table_num, mac_pref);
2733 }
2734 
2735 static int niu_set_alt_mac_rdc_table(struct niu *np, int idx,
2736                                      int table_num, int mac_pref)
2737 {
2738         if (idx >= niu_num_alt_addr(np))
2739                 return -EINVAL;
2740         return __set_rdc_table_num(np, idx, idx + 1, table_num, mac_pref);
2741 }
2742 
2743 static u64 vlan_entry_set_parity(u64 reg_val)
2744 {
2745         u64 port01_mask;
2746         u64 port23_mask;
2747 
2748         port01_mask = 0x00ff;
2749         port23_mask = 0xff00;
2750 
2751         if (hweight64(reg_val & port01_mask) & 1)
2752                 reg_val |= ENET_VLAN_TBL_PARITY0;
2753         else
2754                 reg_val &= ~ENET_VLAN_TBL_PARITY0;
2755 
2756         if (hweight64(reg_val & port23_mask) & 1)
2757                 reg_val |= ENET_VLAN_TBL_PARITY1;
2758         else
2759                 reg_val &= ~ENET_VLAN_TBL_PARITY1;
2760 
2761         return reg_val;
2762 }
2763 
2764 static void vlan_tbl_write(struct niu *np, unsigned long index,
2765                            int port, int vpr, int rdc_table)
2766 {
2767         u64 reg_val = nr64(ENET_VLAN_TBL(index));
2768 
2769         reg_val &= ~((ENET_VLAN_TBL_VPR |
2770                       ENET_VLAN_TBL_VLANRDCTBLN) <<
2771                      ENET_VLAN_TBL_SHIFT(port));
2772         if (vpr)
2773                 reg_val |= (ENET_VLAN_TBL_VPR <<
2774                             ENET_VLAN_TBL_SHIFT(port));
2775         reg_val |= (rdc_table << ENET_VLAN_TBL_SHIFT(port));
2776 
2777         reg_val = vlan_entry_set_parity(reg_val);
2778 
2779         nw64(ENET_VLAN_TBL(index), reg_val);
2780 }
2781 
2782 static void vlan_tbl_clear(struct niu *np)
2783 {
2784         int i;
2785 
2786         for (i = 0; i < ENET_VLAN_TBL_NUM_ENTRIES; i++)
2787                 nw64(ENET_VLAN_TBL(i), 0);
2788 }
2789 
2790 static int tcam_wait_bit(struct niu *np, u64 bit)
2791 {
2792         int limit = 1000;
2793 
2794         while (--limit > 0) {
2795                 if (nr64(TCAM_CTL) & bit)
2796                         break;
2797                 udelay(1);
2798         }
2799         if (limit <= 0)
2800                 return -ENODEV;
2801 
2802         return 0;
2803 }
2804 
2805 static int tcam_flush(struct niu *np, int index)
2806 {
2807         nw64(TCAM_KEY_0, 0x00);
2808         nw64(TCAM_KEY_MASK_0, 0xff);
2809         nw64(TCAM_CTL, (TCAM_CTL_RWC_TCAM_WRITE | index));
2810 
2811         return tcam_wait_bit(np, TCAM_CTL_STAT);
2812 }
2813 
2814 #if 0
2815 static int tcam_read(struct niu *np, int index,
2816                      u64 *key, u64 *mask)
2817 {
2818         int err;
2819 
2820         nw64(TCAM_CTL, (TCAM_CTL_RWC_TCAM_READ | index));
2821         err = tcam_wait_bit(np, TCAM_CTL_STAT);
2822         if (!err) {
2823                 key[0] = nr64(TCAM_KEY_0);
2824                 key[1] = nr64(TCAM_KEY_1);
2825                 key[2] = nr64(TCAM_KEY_2);
2826                 key[3] = nr64(TCAM_KEY_3);
2827                 mask[0] = nr64(TCAM_KEY_MASK_0);
2828                 mask[1] = nr64(TCAM_KEY_MASK_1);
2829                 mask[2] = nr64(TCAM_KEY_MASK_2);
2830                 mask[3] = nr64(TCAM_KEY_MASK_3);
2831         }
2832         return err;
2833 }
2834 #endif
2835 
2836 static int tcam_write(struct niu *np, int index,
2837                       u64 *key, u64 *mask)
2838 {
2839         nw64(TCAM_KEY_0, key[0]);
2840         nw64(TCAM_KEY_1, key[1]);
2841         nw64(TCAM_KEY_2, key[2]);
2842         nw64(TCAM_KEY_3, key[3]);
2843         nw64(TCAM_KEY_MASK_0, mask[0]);
2844         nw64(TCAM_KEY_MASK_1, mask[1]);
2845         nw64(TCAM_KEY_MASK_2, mask[2]);
2846         nw64(TCAM_KEY_MASK_3, mask[3]);
2847         nw64(TCAM_CTL, (TCAM_CTL_RWC_TCAM_WRITE | index));
2848 
2849         return tcam_wait_bit(np, TCAM_CTL_STAT);
2850 }
2851 
2852 #if 0
2853 static int tcam_assoc_read(struct niu *np, int index, u64 *data)
2854 {
2855         int err;
2856 
2857         nw64(TCAM_CTL, (TCAM_CTL_RWC_RAM_READ | index));
2858         err = tcam_wait_bit(np, TCAM_CTL_STAT);
2859         if (!err)
2860                 *data = nr64(TCAM_KEY_1);
2861 
2862         return err;
2863 }
2864 #endif
2865 
2866 static int tcam_assoc_write(struct niu *np, int index, u64 assoc_data)
2867 {
2868         nw64(TCAM_KEY_1, assoc_data);
2869         nw64(TCAM_CTL, (TCAM_CTL_RWC_RAM_WRITE | index));
2870 
2871         return tcam_wait_bit(np, TCAM_CTL_STAT);
2872 }
2873 
2874 static void tcam_enable(struct niu *np, int on)
2875 {
2876         u64 val = nr64(FFLP_CFG_1);
2877 
2878         if (on)
2879                 val &= ~FFLP_CFG_1_TCAM_DIS;
2880         else
2881                 val |= FFLP_CFG_1_TCAM_DIS;
2882         nw64(FFLP_CFG_1, val);
2883 }
2884 
2885 static void tcam_set_lat_and_ratio(struct niu *np, u64 latency, u64 ratio)
2886 {
2887         u64 val = nr64(FFLP_CFG_1);
2888 
2889         val &= ~(FFLP_CFG_1_FFLPINITDONE |
2890                  FFLP_CFG_1_CAMLAT |
2891                  FFLP_CFG_1_CAMRATIO);
2892         val |= (latency << FFLP_CFG_1_CAMLAT_SHIFT);
2893         val |= (ratio << FFLP_CFG_1_CAMRATIO_SHIFT);
2894         nw64(FFLP_CFG_1, val);
2895 
2896         val = nr64(FFLP_CFG_1);
2897         val |= FFLP_CFG_1_FFLPINITDONE;
2898         nw64(FFLP_CFG_1, val);
2899 }
2900 
2901 static int tcam_user_eth_class_enable(struct niu *np, unsigned long class,
2902                                       int on)
2903 {
2904         unsigned long reg;
2905         u64 val;
2906 
2907         if (class < CLASS_CODE_ETHERTYPE1 ||
2908             class > CLASS_CODE_ETHERTYPE2)
2909                 return -EINVAL;
2910 
2911         reg = L2_CLS(class - CLASS_CODE_ETHERTYPE1);
2912         val = nr64(reg);
2913         if (on)
2914                 val |= L2_CLS_VLD;
2915         else
2916                 val &= ~L2_CLS_VLD;
2917         nw64(reg, val);
2918 
2919         return 0;
2920 }
2921 
2922 #if 0
2923 static int tcam_user_eth_class_set(struct niu *np, unsigned long class,
2924                                    u64 ether_type)
2925 {
2926         unsigned long reg;
2927         u64 val;
2928 
2929         if (class < CLASS_CODE_ETHERTYPE1 ||
2930             class > CLASS_CODE_ETHERTYPE2 ||
2931             (ether_type & ~(u64)0xffff) != 0)
2932                 return -EINVAL;
2933 
2934         reg = L2_CLS(class - CLASS_CODE_ETHERTYPE1);
2935         val = nr64(reg);
2936         val &= ~L2_CLS_ETYPE;
2937         val |= (ether_type << L2_CLS_ETYPE_SHIFT);
2938         nw64(reg, val);
2939 
2940         return 0;
2941 }
2942 #endif
2943 
2944 static int tcam_user_ip_class_enable(struct niu *np, unsigned long class,
2945                                      int on)
2946 {
2947         unsigned long reg;
2948         u64 val;
2949 
2950         if (class < CLASS_CODE_USER_PROG1 ||
2951             class > CLASS_CODE_USER_PROG4)
2952                 return -EINVAL;
2953 
2954         reg = L3_CLS(class - CLASS_CODE_USER_PROG1);
2955         val = nr64(reg);
2956         if (on)
2957                 val |= L3_CLS_VALID;
2958         else
2959                 val &= ~L3_CLS_VALID;
2960         nw64(reg, val);
2961 
2962         return 0;
2963 }
2964 
2965 static int tcam_user_ip_class_set(struct niu *np, unsigned long class,
2966                                   int ipv6, u64 protocol_id,
2967                                   u64 tos_mask, u64 tos_val)
2968 {
2969         unsigned long reg;
2970         u64 val;
2971 
2972         if (class < CLASS_CODE_USER_PROG1 ||
2973             class > CLASS_CODE_USER_PROG4 ||
2974             (protocol_id & ~(u64)0xff) != 0 ||
2975             (tos_mask & ~(u64)0xff) != 0 ||
2976             (tos_val & ~(u64)0xff) != 0)
2977                 return -EINVAL;
2978 
2979         reg = L3_CLS(class - CLASS_CODE_USER_PROG1);
2980         val = nr64(reg);
2981         val &= ~(L3_CLS_IPVER | L3_CLS_PID |
2982                  L3_CLS_TOSMASK | L3_CLS_TOS);
2983         if (ipv6)
2984                 val |= L3_CLS_IPVER;
2985         val |= (protocol_id << L3_CLS_PID_SHIFT);
2986         val |= (tos_mask << L3_CLS_TOSMASK_SHIFT);
2987         val |= (tos_val << L3_CLS_TOS_SHIFT);
2988         nw64(reg, val);
2989 
2990         return 0;
2991 }
2992 
2993 static int tcam_early_init(struct niu *np)
2994 {
2995         unsigned long i;
2996         int err;
2997 
2998         tcam_enable(np, 0);
2999         tcam_set_lat_and_ratio(np,
3000                                DEFAULT_TCAM_LATENCY,
3001                                DEFAULT_TCAM_ACCESS_RATIO);
3002         for (i = CLASS_CODE_ETHERTYPE1; i <= CLASS_CODE_ETHERTYPE2; i++) {
3003                 err = tcam_user_eth_class_enable(np, i, 0);
3004                 if (err)
3005                         return err;
3006         }
3007         for (i = CLASS_CODE_USER_PROG1; i <= CLASS_CODE_USER_PROG4; i++) {
3008                 err = tcam_user_ip_class_enable(np, i, 0);
3009                 if (err)
3010                         return err;
3011         }
3012 
3013         return 0;
3014 }
3015 
3016 static int tcam_flush_all(struct niu *np)
3017 {
3018         unsigned long i;
3019 
3020         for (i = 0; i < np->parent->tcam_num_entries; i++) {
3021                 int err = tcam_flush(np, i);
3022                 if (err)
3023                         return err;
3024         }
3025         return 0;
3026 }
3027 
3028 static u64 hash_addr_regval(unsigned long index, unsigned long num_entries)
3029 {
3030         return (u64)index | (num_entries == 1 ? HASH_TBL_ADDR_AUTOINC : 0);
3031 }
3032 
3033 #if 0
3034 static int hash_read(struct niu *np, unsigned long partition,
3035                      unsigned long index, unsigned long num_entries,
3036                      u64 *data)
3037 {
3038         u64 val = hash_addr_regval(index, num_entries);
3039         unsigned long i;
3040 
3041         if (partition >= FCRAM_NUM_PARTITIONS ||
3042             index + num_entries > FCRAM_SIZE)
3043                 return -EINVAL;
3044 
3045         nw64(HASH_TBL_ADDR(partition), val);
3046         for (i = 0; i < num_entries; i++)
3047                 data[i] = nr64(HASH_TBL_DATA(partition));
3048 
3049         return 0;
3050 }
3051 #endif
3052 
3053 static int hash_write(struct niu *np, unsigned long partition,
3054                       unsigned long index, unsigned long num_entries,
3055                       u64 *data)
3056 {
3057         u64 val = hash_addr_regval(index, num_entries);
3058         unsigned long i;
3059 
3060         if (partition >= FCRAM_NUM_PARTITIONS ||
3061             index + (num_entries * 8) > FCRAM_SIZE)
3062                 return -EINVAL;
3063 
3064         nw64(HASH_TBL_ADDR(partition), val);
3065         for (i = 0; i < num_entries; i++)
3066                 nw64(HASH_TBL_DATA(partition), data[i]);
3067 
3068         return 0;
3069 }
3070 
3071 static void fflp_reset(struct niu *np)
3072 {
3073         u64 val;
3074 
3075         nw64(FFLP_CFG_1, FFLP_CFG_1_PIO_FIO_RST);
3076         udelay(10);
3077         nw64(FFLP_CFG_1, 0);
3078 
3079         val = FFLP_CFG_1_FCRAMOUTDR_NORMAL | FFLP_CFG_1_FFLPINITDONE;
3080         nw64(FFLP_CFG_1, val);
3081 }
3082 
3083 static void fflp_set_timings(struct niu *np)
3084 {
3085         u64 val = nr64(FFLP_CFG_1);
3086 
3087         val &= ~FFLP_CFG_1_FFLPINITDONE;
3088         val |= (DEFAULT_FCRAMRATIO << FFLP_CFG_1_FCRAMRATIO_SHIFT);
3089         nw64(FFLP_CFG_1, val);
3090 
3091         val = nr64(FFLP_CFG_1);
3092         val |= FFLP_CFG_1_FFLPINITDONE;
3093         nw64(FFLP_CFG_1, val);
3094 
3095         val = nr64(FCRAM_REF_TMR);
3096         val &= ~(FCRAM_REF_TMR_MAX | FCRAM_REF_TMR_MIN);
3097         val |= (DEFAULT_FCRAM_REFRESH_MAX << FCRAM_REF_TMR_MAX_SHIFT);
3098         val |= (DEFAULT_FCRAM_REFRESH_MIN << FCRAM_REF_TMR_MIN_SHIFT);
3099         nw64(FCRAM_REF_TMR, val);
3100 }
3101 
3102 static int fflp_set_partition(struct niu *np, u64 partition,
3103                               u64 mask, u64 base, int enable)
3104 {
3105         unsigned long reg;
3106         u64 val;
3107 
3108         if (partition >= FCRAM_NUM_PARTITIONS ||
3109             (mask & ~(u64)0x1f) != 0 ||
3110             (base & ~(u64)0x1f) != 0)
3111                 return -EINVAL;
3112 
3113         reg = FLW_PRT_SEL(partition);
3114 
3115         val = nr64(reg);
3116         val &= ~(FLW_PRT_SEL_EXT | FLW_PRT_SEL_MASK | FLW_PRT_SEL_BASE);
3117         val |= (mask << FLW_PRT_SEL_MASK_SHIFT);
3118         val |= (base << FLW_PRT_SEL_BASE_SHIFT);
3119         if (enable)
3120                 val |= FLW_PRT_SEL_EXT;
3121         nw64(reg, val);
3122 
3123         return 0;
3124 }
3125 
3126 static int fflp_disable_all_partitions(struct niu *np)
3127 {
3128         unsigned long i;
3129 
3130         for (i = 0; i < FCRAM_NUM_PARTITIONS; i++) {
3131                 int err = fflp_set_partition(np, 0, 0, 0, 0);
3132                 if (err)
3133                         return err;
3134         }
3135         return 0;
3136 }
3137 
3138 static void fflp_llcsnap_enable(struct niu *np, int on)
3139 {
3140         u64 val = nr64(FFLP_CFG_1);
3141 
3142         if (on)
3143                 val |= FFLP_CFG_1_LLCSNAP;
3144         else
3145                 val &= ~FFLP_CFG_1_LLCSNAP;
3146         nw64(FFLP_CFG_1, val);
3147 }
3148 
3149 static void fflp_errors_enable(struct niu *np, int on)
3150 {
3151         u64 val = nr64(FFLP_CFG_1);
3152 
3153         if (on)
3154                 val &= ~FFLP_CFG_1_ERRORDIS;
3155         else
3156                 val |= FFLP_CFG_1_ERRORDIS;
3157         nw64(FFLP_CFG_1, val);
3158 }
3159 
3160 static int fflp_hash_clear(struct niu *np)
3161 {
3162         struct fcram_hash_ipv4 ent;
3163         unsigned long i;
3164 
3165         /* IPV4 hash entry with valid bit clear, rest is don't care.  */
3166         memset(&ent, 0, sizeof(ent));
3167         ent.header = HASH_HEADER_EXT;
3168 
3169         for (i = 0; i < FCRAM_SIZE; i += sizeof(ent)) {
3170                 int err = hash_write(np, 0, i, 1, (u64 *) &ent);
3171                 if (err)
3172                         return err;
3173         }
3174         return 0;
3175 }
3176 
3177 static int fflp_early_init(struct niu *np)
3178 {
3179         struct niu_parent *parent;
3180         unsigned long flags;
3181         int err;
3182 
3183         niu_lock_parent(np, flags);
3184 
3185         parent = np->parent;
3186         err = 0;
3187         if (!(parent->flags & PARENT_FLGS_CLS_HWINIT)) {
3188                 if (np->parent->plat_type != PLAT_TYPE_NIU) {
3189                         fflp_reset(np);
3190                         fflp_set_timings(np);
3191                         err = fflp_disable_all_partitions(np);
3192                         if (err) {
3193                                 netif_printk(np, probe, KERN_DEBUG, np->dev,
3194                                              "fflp_disable_all_partitions failed, err=%d\n",
3195                                              err);
3196                                 goto out;
3197                         }
3198                 }
3199 
3200                 err = tcam_early_init(np);
3201                 if (err) {
3202                         netif_printk(np, probe, KERN_DEBUG, np->dev,
3203                                      "tcam_early_init failed, err=%d\n", err);
3204                         goto out;
3205                 }
3206                 fflp_llcsnap_enable(np, 1);
3207                 fflp_errors_enable(np, 0);
3208                 nw64(H1POLY, 0);
3209                 nw64(H2POLY, 0);
3210 
3211                 err = tcam_flush_all(np);
3212                 if (err) {
3213                         netif_printk(np, probe, KERN_DEBUG, np->dev,
3214                                      "tcam_flush_all failed, err=%d\n", err);
3215                         goto out;
3216                 }
3217                 if (np->parent->plat_type != PLAT_TYPE_NIU) {
3218                         err = fflp_hash_clear(np);
3219                         if (err) {
3220                                 netif_printk(np, probe, KERN_DEBUG, np->dev,
3221                                              "fflp_hash_clear failed, err=%d\n",
3222                                              err);
3223                                 goto out;
3224                         }
3225                 }
3226 
3227                 vlan_tbl_clear(np);
3228 
3229                 parent->flags |= PARENT_FLGS_CLS_HWINIT;
3230         }
3231 out:
3232         niu_unlock_parent(np, flags);
3233         return err;
3234 }
3235 
3236 static int niu_set_flow_key(struct niu *np, unsigned long class_code, u64 key)
3237 {
3238         if (class_code < CLASS_CODE_USER_PROG1 ||
3239             class_code > CLASS_CODE_SCTP_IPV6)
3240                 return -EINVAL;
3241 
3242         nw64(FLOW_KEY(class_code - CLASS_CODE_USER_PROG1), key);
3243         return 0;
3244 }
3245 
3246 static int niu_set_tcam_key(struct niu *np, unsigned long class_code, u64 key)
3247 {
3248         if (class_code < CLASS_CODE_USER_PROG1 ||
3249             class_code > CLASS_CODE_SCTP_IPV6)
3250                 return -EINVAL;
3251 
3252         nw64(TCAM_KEY(class_code - CLASS_CODE_USER_PROG1), key);
3253         return 0;
3254 }
3255 
3256 /* Entries for the ports are interleaved in the TCAM */
3257 static u16 tcam_get_index(struct niu *np, u16 idx)
3258 {
3259         /* One entry reserved for IP fragment rule */
3260         if (idx >= (np->clas.tcam_sz - 1))
3261                 idx = 0;
3262         return np->clas.tcam_top + ((idx+1) * np->parent->num_ports);
3263 }
3264 
3265 static u16 tcam_get_size(struct niu *np)
3266 {
3267         /* One entry reserved for IP fragment rule */
3268         return np->clas.tcam_sz - 1;
3269 }
3270 
3271 static u16 tcam_get_valid_entry_cnt(struct niu *np)
3272 {
3273         /* One entry reserved for IP fragment rule */
3274         return np->clas.tcam_valid_entries - 1;
3275 }
3276 
3277 static void niu_rx_skb_append(struct sk_buff *skb, struct page *page,
3278                               u32 offset, u32 size, u32 truesize)
3279 {
3280         skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags, page, offset, size);
3281 
3282         skb->len += size;
3283         skb->data_len += size;
3284         skb->truesize += truesize;
3285 }
3286 
3287 static unsigned int niu_hash_rxaddr(struct rx_ring_info *rp, u64 a)
3288 {
3289         a >>= PAGE_SHIFT;
3290         a ^= (a >> ilog2(MAX_RBR_RING_SIZE));
3291 
3292         return a & (MAX_RBR_RING_SIZE - 1);
3293 }
3294 
3295 static struct page *niu_find_rxpage(struct rx_ring_info *rp, u64 addr,
3296                                     struct page ***link)
3297 {
3298         unsigned int h = niu_hash_rxaddr(rp, addr);
3299         struct page *p, **pp;
3300 
3301         addr &= PAGE_MASK;
3302         pp = &rp->rxhash[h];
3303         for (; (p = *pp) != NULL; pp = (struct page **) &p->mapping) {
3304                 if (p->index == addr) {
3305                         *link = pp;
3306                         goto found;
3307                 }
3308         }
3309         BUG();
3310 
3311 found:
3312         return p;
3313 }
3314 
3315 static void niu_hash_page(struct rx_ring_info *rp, struct page *page, u64 base)
3316 {
3317         unsigned int h = niu_hash_rxaddr(rp, base);
3318 
3319         page->index = base;
3320         page->mapping = (struct address_space *) rp->rxhash[h];
3321         rp->rxhash[h] = page;
3322 }
3323 
3324 static int niu_rbr_add_page(struct niu *np, struct rx_ring_info *rp,
3325                             gfp_t mask, int start_index)
3326 {
3327         struct page *page;
3328         u64 addr;
3329         int i;
3330 
3331         page = alloc_page(mask);
3332         if (!page)
3333                 return -ENOMEM;
3334 
3335         addr = np->ops->map_page(np->device, page, 0,
3336                                  PAGE_SIZE, DMA_FROM_DEVICE);
3337         if (!addr) {
3338                 __free_page(page);
3339                 return -ENOMEM;
3340         }
3341 
3342         niu_hash_page(rp, page, addr);
3343         if (rp->rbr_blocks_per_page > 1)
3344                 atomic_add(rp->rbr_blocks_per_page - 1,
3345                            &compound_head(page)->_count);
3346 
3347         for (i = 0; i < rp->rbr_blocks_per_page; i++) {
3348                 __le32 *rbr = &rp->rbr[start_index + i];
3349 
3350                 *rbr = cpu_to_le32(addr >> RBR_DESCR_ADDR_SHIFT);
3351                 addr += rp->rbr_block_size;
3352         }
3353 
3354         return 0;
3355 }
3356 
3357 static void niu_rbr_refill(struct niu *np, struct rx_ring_info *rp, gfp_t mask)
3358 {
3359         int index = rp->rbr_index;
3360 
3361         rp->rbr_pending++;
3362         if ((rp->rbr_pending % rp->rbr_blocks_per_page) == 0) {
3363                 int err = niu_rbr_add_page(np, rp, mask, index);
3364 
3365                 if (unlikely(err)) {
3366                         rp->rbr_pending--;
3367                         return;
3368                 }
3369 
3370                 rp->rbr_index += rp->rbr_blocks_per_page;
3371                 BUG_ON(rp->rbr_index > rp->rbr_table_size);
3372                 if (rp->rbr_index == rp->rbr_table_size)
3373                         rp->rbr_index = 0;
3374 
3375                 if (rp->rbr_pending >= rp->rbr_kick_thresh) {
3376                         nw64(RBR_KICK(rp->rx_channel), rp->rbr_pending);
3377                         rp->rbr_pending = 0;
3378                 }
3379         }
3380 }
3381 
3382 static int niu_rx_pkt_ignore(struct niu *np, struct rx_ring_info *rp)
3383 {
3384         unsigned int index = rp->rcr_index;
3385         int num_rcr = 0;
3386 
3387         rp->rx_dropped++;
3388         while (1) {
3389                 struct page *page, **link;
3390                 u64 addr, val;
3391                 u32 rcr_size;
3392 
3393                 num_rcr++;
3394 
3395                 val = le64_to_cpup(&rp->rcr[index]);
3396                 addr = (val & RCR_ENTRY_PKT_BUF_ADDR) <<
3397                         RCR_ENTRY_PKT_BUF_ADDR_SHIFT;
3398                 page = niu_find_rxpage(rp, addr, &link);
3399 
3400                 rcr_size = rp->rbr_sizes[(val & RCR_ENTRY_PKTBUFSZ) >>
3401                                          RCR_ENTRY_PKTBUFSZ_SHIFT];
3402                 if ((page->index + PAGE_SIZE) - rcr_size == addr) {
3403                         *link = (struct page *) page->mapping;
3404                         np->ops->unmap_page(np->device, page->index,
3405                                             PAGE_SIZE, DMA_FROM_DEVICE);
3406                         page->index = 0;
3407                         page->mapping = NULL;
3408                         __free_page(page);
3409                         rp->rbr_refill_pending++;
3410                 }
3411 
3412                 index = NEXT_RCR(rp, index);
3413                 if (!(val & RCR_ENTRY_MULTI))
3414                         break;
3415 
3416         }
3417         rp->rcr_index = index;
3418 
3419         return num_rcr;
3420 }
3421 
3422 static int niu_process_rx_pkt(struct napi_struct *napi, struct niu *np,
3423                               struct rx_ring_info *rp)
3424 {
3425         unsigned int index = rp->rcr_index;
3426         struct rx_pkt_hdr1 *rh;
3427         struct sk_buff *skb;
3428         int len, num_rcr;
3429 
3430         skb = netdev_alloc_skb(np->dev, RX_SKB_ALLOC_SIZE);
3431         if (unlikely(!skb))
3432                 return niu_rx_pkt_ignore(np, rp);
3433 
3434         num_rcr = 0;
3435         while (1) {
3436                 struct page *page, **link;
3437                 u32 rcr_size, append_size;
3438                 u64 addr, val, off;
3439 
3440                 num_rcr++;
3441 
3442                 val = le64_to_cpup(&rp->rcr[index]);
3443 
3444                 len = (val & RCR_ENTRY_L2_LEN) >>
3445                         RCR_ENTRY_L2_LEN_SHIFT;
3446                 len -= ETH_FCS_LEN;
3447 
3448                 addr = (val & RCR_ENTRY_PKT_BUF_ADDR) <<
3449                         RCR_ENTRY_PKT_BUF_ADDR_SHIFT;
3450                 page = niu_find_rxpage(rp, addr, &link);
3451 
3452                 rcr_size = rp->rbr_sizes[(val & RCR_ENTRY_PKTBUFSZ) >>
3453                                          RCR_ENTRY_PKTBUFSZ_SHIFT];
3454 
3455                 off = addr & ~PAGE_MASK;
3456                 append_size = rcr_size;
3457                 if (num_rcr == 1) {
3458                         int ptype;
3459 
3460                         ptype = (val >> RCR_ENTRY_PKT_TYPE_SHIFT);
3461                         if ((ptype == RCR_PKT_TYPE_TCP ||
3462                              ptype == RCR_PKT_TYPE_UDP) &&
3463                             !(val & (RCR_ENTRY_NOPORT |
3464                                      RCR_ENTRY_ERROR)))
3465                                 skb->ip_summed = CHECKSUM_UNNECESSARY;
3466                         else
3467                                 skb_checksum_none_assert(skb);
3468                 } else if (!(val & RCR_ENTRY_MULTI))
3469                         append_size = len - skb->len;
3470 
3471                 niu_rx_skb_append(skb, page, off, append_size, rcr_size);
3472                 if ((page->index + rp->rbr_block_size) - rcr_size == addr) {
3473                         *link = (struct page *) page->mapping;
3474                         np->ops->unmap_page(np->device, page->index,
3475                                             PAGE_SIZE, DMA_FROM_DEVICE);
3476                         page->index = 0;
3477                         page->mapping = NULL;
3478                         rp->rbr_refill_pending++;
3479                 } else
3480                         get_page(page);
3481 
3482                 index = NEXT_RCR(rp, index);
3483                 if (!(val & RCR_ENTRY_MULTI))
3484                         break;
3485 
3486         }
3487         rp->rcr_index = index;
3488 
3489         len += sizeof(*rh);
3490         len = min_t(int, len, sizeof(*rh) + VLAN_ETH_HLEN);
3491         __pskb_pull_tail(skb, len);
3492 
3493         rh = (struct rx_pkt_hdr1 *) skb->data;
3494         if (np->dev->features & NETIF_F_RXHASH)
3495                 skb_set_hash(skb,
3496                              ((u32)rh->hashval2_0 << 24 |
3497                               (u32)rh->hashval2_1 << 16 |
3498                               (u32)rh->hashval1_1 << 8 |
3499                               (u32)rh->hashval1_2 << 0),
3500                              PKT_HASH_TYPE_L3);
3501         skb_pull(skb, sizeof(*rh));
3502 
3503         rp->rx_packets++;
3504         rp->rx_bytes += skb->len;
3505 
3506         skb->protocol = eth_type_trans(skb, np->dev);
3507         skb_record_rx_queue(skb, rp->rx_channel);
3508         napi_gro_receive(napi, skb);
3509 
3510         return num_rcr;
3511 }
3512 
3513 static int niu_rbr_fill(struct niu *np, struct rx_ring_info *rp, gfp_t mask)
3514 {
3515         int blocks_per_page = rp->rbr_blocks_per_page;
3516         int err, index = rp->rbr_index;
3517 
3518         err = 0;
3519         while (index < (rp->rbr_table_size - blocks_per_page)) {
3520                 err = niu_rbr_add_page(np, rp, mask, index);
3521                 if (unlikely(err))
3522                         break;
3523 
3524                 index += blocks_per_page;
3525         }
3526 
3527         rp->rbr_index = index;
3528         return err;
3529 }
3530 
3531 static void niu_rbr_free(struct niu *np, struct rx_ring_info *rp)
3532 {
3533         int i;
3534 
3535         for (i = 0; i < MAX_RBR_RING_SIZE; i++) {
3536                 struct page *page;
3537 
3538                 page = rp->rxhash[i];
3539                 while (page) {
3540                         struct page *next = (struct page *) page->mapping;
3541                         u64 base = page->index;
3542 
3543                         np->ops->unmap_page(np->device, base, PAGE_SIZE,
3544                                             DMA_FROM_DEVICE);
3545                         page->index = 0;
3546                         page->mapping = NULL;
3547 
3548                         __free_page(page);
3549 
3550                         page = next;
3551                 }
3552         }
3553 
3554         for (i = 0; i < rp->rbr_table_size; i++)
3555                 rp->rbr[i] = cpu_to_le32(0);
3556         rp->rbr_index = 0;
3557 }
3558 
3559 static int release_tx_packet(struct niu *np, struct tx_ring_info *rp, int idx)
3560 {
3561         struct tx_buff_info *tb = &rp->tx_buffs[idx];
3562         struct sk_buff *skb = tb->skb;
3563         struct tx_pkt_hdr *tp;
3564         u64 tx_flags;
3565         int i, len;
3566 
3567         tp = (struct tx_pkt_hdr *) skb->data;
3568         tx_flags = le64_to_cpup(&tp->flags);
3569 
3570         rp->tx_packets++;
3571         rp->tx_bytes += (((tx_flags & TXHDR_LEN) >> TXHDR_LEN_SHIFT) -
3572                          ((tx_flags & TXHDR_PAD) / 2));
3573 
3574         len = skb_headlen(skb);
3575         np->ops->unmap_single(np->device, tb->mapping,
3576                               len, DMA_TO_DEVICE);
3577 
3578         if (le64_to_cpu(rp->descr[idx]) & TX_DESC_MARK)
3579                 rp->mark_pending--;
3580 
3581         tb->skb = NULL;
3582         do {
3583                 idx = NEXT_TX(rp, idx);
3584                 len -= MAX_TX_DESC_LEN;
3585         } while (len > 0);
3586 
3587         for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
3588                 tb = &rp->tx_buffs[idx];
3589                 BUG_ON(tb->skb != NULL);
3590                 np->ops->unmap_page(np->device, tb->mapping,
3591                                     skb_frag_size(&skb_shinfo(skb)->frags[i]),
3592                                     DMA_TO_DEVICE);
3593                 idx = NEXT_TX(rp, idx);
3594         }
3595 
3596         dev_kfree_skb(skb);
3597 
3598         return idx;
3599 }
3600 
3601 #define NIU_TX_WAKEUP_THRESH(rp)                ((rp)->pending / 4)
3602 
3603 static void niu_tx_work(struct niu *np, struct tx_ring_info *rp)
3604 {
3605         struct netdev_queue *txq;
3606         u16 pkt_cnt, tmp;
3607         int cons, index;
3608         u64 cs;
3609 
3610         index = (rp - np->tx_rings);
3611         txq = netdev_get_tx_queue(np->dev, index);
3612 
3613         cs = rp->tx_cs;
3614         if (unlikely(!(cs & (TX_CS_MK | TX_CS_MMK))))
3615                 goto out;
3616 
3617         tmp = pkt_cnt = (cs & TX_CS_PKT_CNT) >> TX_CS_PKT_CNT_SHIFT;
3618         pkt_cnt = (pkt_cnt - rp->last_pkt_cnt) &
3619                 (TX_CS_PKT_CNT >> TX_CS_PKT_CNT_SHIFT);
3620 
3621         rp->last_pkt_cnt = tmp;
3622 
3623         cons = rp->cons;
3624 
3625         netif_printk(np, tx_done, KERN_DEBUG, np->dev,
3626                      "%s() pkt_cnt[%u] cons[%d]\n", __func__, pkt_cnt, cons);
3627 
3628         while (pkt_cnt--)
3629                 cons = release_tx_packet(np, rp, cons);
3630 
3631         rp->cons = cons;
3632         smp_mb();
3633 
3634 out:
3635         if (unlikely(netif_tx_queue_stopped(txq) &&
3636                      (niu_tx_avail(rp) > NIU_TX_WAKEUP_THRESH(rp)))) {
3637                 __netif_tx_lock(txq, smp_processor_id());
3638                 if (netif_tx_queue_stopped(txq) &&
3639                     (niu_tx_avail(rp) > NIU_TX_WAKEUP_THRESH(rp)))
3640                         netif_tx_wake_queue(txq);
3641                 __netif_tx_unlock(txq);
3642         }
3643 }
3644 
3645 static inline void niu_sync_rx_discard_stats(struct niu *np,
3646                                              struct rx_ring_info *rp,
3647                                              const int limit)
3648 {
3649         /* This elaborate scheme is needed for reading the RX discard
3650          * counters, as they are only 16-bit and can overflow quickly,
3651          * and because the overflow indication bit is not usable as
3652          * the counter value does not wrap, but remains at max value
3653          * 0xFFFF.
3654          *
3655          * In theory and in practice counters can be lost in between
3656          * reading nr64() and clearing the counter nw64().  For this
3657          * reason, the number of counter clearings nw64() is
3658          * limited/reduced though the limit parameter.
3659          */
3660         int rx_channel = rp->rx_channel;
3661         u32 misc, wred;
3662 
3663         /* RXMISC (Receive Miscellaneous Discard Count), covers the
3664          * following discard events: IPP (Input Port Process),
3665          * FFLP/TCAM, Full RCR (Receive Completion Ring) RBR (Receive
3666          * Block Ring) prefetch buffer is empty.
3667          */
3668         misc = nr64(RXMISC(rx_channel));
3669         if (unlikely((misc & RXMISC_COUNT) > limit)) {
3670                 nw64(RXMISC(rx_channel), 0);
3671                 rp->rx_errors += misc & RXMISC_COUNT;
3672 
3673                 if (unlikely(misc & RXMISC_OFLOW))
3674                         dev_err(np->device, "rx-%d: Counter overflow RXMISC discard\n",
3675                                 rx_channel);
3676 
3677                 netif_printk(np, rx_err, KERN_DEBUG, np->dev,
3678                              "rx-%d: MISC drop=%u over=%u\n",
3679                              rx_channel, misc, misc-limit);
3680         }
3681 
3682         /* WRED (Weighted Random Early Discard) by hardware */
3683         wred = nr64(RED_DIS_CNT(rx_channel));
3684         if (unlikely((wred & RED_DIS_CNT_COUNT) > limit)) {
3685                 nw64(RED_DIS_CNT(rx_channel), 0);
3686                 rp->rx_dropped += wred & RED_DIS_CNT_COUNT;
3687 
3688                 if (unlikely(wred & RED_DIS_CNT_OFLOW))
3689                         dev_err(np->device, "rx-%d: Counter overflow WRED discard\n", rx_channel);
3690 
3691                 netif_printk(np, rx_err, KERN_DEBUG, np->dev,
3692                              "rx-%d: WRED drop=%u over=%u\n",
3693                              rx_channel, wred, wred-limit);
3694         }
3695 }
3696 
3697 static int niu_rx_work(struct napi_struct *napi, struct niu *np,
3698                        struct rx_ring_info *rp, int budget)
3699 {
3700         int qlen, rcr_done = 0, work_done = 0;
3701         struct rxdma_mailbox *mbox = rp->mbox;
3702         u64 stat;
3703 
3704 #if 1
3705         stat = nr64(RX_DMA_CTL_STAT(rp->rx_channel));
3706         qlen = nr64(RCRSTAT_A(rp->rx_channel)) & RCRSTAT_A_QLEN;
3707 #else
3708         stat = le64_to_cpup(&mbox->rx_dma_ctl_stat);
3709         qlen = (le64_to_cpup(&mbox->rcrstat_a) & RCRSTAT_A_QLEN);
3710 #endif
3711         mbox->rx_dma_ctl_stat = 0;
3712         mbox->rcrstat_a = 0;
3713 
3714         netif_printk(np, rx_status, KERN_DEBUG, np->dev,
3715                      "%s(chan[%d]), stat[%llx] qlen=%d\n",
3716                      __func__, rp->rx_channel, (unsigned long long)stat, qlen);
3717 
3718         rcr_done = work_done = 0;
3719         qlen = min(qlen, budget);
3720         while (work_done < qlen) {
3721                 rcr_done += niu_process_rx_pkt(napi, np, rp);
3722                 work_done++;
3723         }
3724 
3725         if (rp->rbr_refill_pending >= rp->rbr_kick_thresh) {
3726                 unsigned int i;
3727 
3728                 for (i = 0; i < rp->rbr_refill_pending; i++)
3729                         niu_rbr_refill(np, rp, GFP_ATOMIC);
3730                 rp->rbr_refill_pending = 0;
3731         }
3732 
3733         stat = (RX_DMA_CTL_STAT_MEX |
3734                 ((u64)work_done << RX_DMA_CTL_STAT_PKTREAD_SHIFT) |
3735                 ((u64)rcr_done << RX_DMA_CTL_STAT_PTRREAD_SHIFT));
3736 
3737         nw64(RX_DMA_CTL_STAT(rp->rx_channel), stat);
3738 
3739         /* Only sync discards stats when qlen indicate potential for drops */
3740         if (qlen > 10)
3741                 niu_sync_rx_discard_stats(np, rp, 0x7FFF);
3742 
3743         return work_done;
3744 }
3745 
3746 static int niu_poll_core(struct niu *np, struct niu_ldg *lp, int budget)
3747 {
3748         u64 v0 = lp->v0;
3749         u32 tx_vec = (v0 >> 32);
3750         u32 rx_vec = (v0 & 0xffffffff);
3751         int i, work_done = 0;
3752 
3753         netif_printk(np, intr, KERN_DEBUG, np->dev,
3754                      "%s() v0[%016llx]\n", __func__, (unsigned long long)v0);
3755 
3756         for (i = 0; i < np->num_tx_rings; i++) {
3757                 struct tx_ring_info *rp = &np->tx_rings[i];
3758                 if (tx_vec & (1 << rp->tx_channel))
3759                         niu_tx_work(np, rp);
3760                 nw64(LD_IM0(LDN_TXDMA(rp->tx_channel)), 0);
3761         }
3762 
3763         for (i = 0; i < np->num_rx_rings; i++) {
3764                 struct rx_ring_info *rp = &np->rx_rings[i];
3765 
3766                 if (rx_vec & (1 << rp->rx_channel)) {
3767                         int this_work_done;
3768 
3769                         this_work_done = niu_rx_work(&lp->napi, np, rp,
3770                                                      budget);
3771 
3772                         budget -= this_work_done;
3773                         work_done += this_work_done;
3774                 }
3775                 nw64(LD_IM0(LDN_RXDMA(rp->rx_channel)), 0);
3776         }
3777 
3778         return work_done;
3779 }
3780 
3781 static int niu_poll(struct napi_struct *napi, int budget)
3782 {
3783         struct niu_ldg *lp = container_of(napi, struct niu_ldg, napi);
3784         struct niu *np = lp->np;
3785         int work_done;
3786 
3787         work_done = niu_poll_core(np, lp, budget);
3788 
3789         if (work_done < budget) {
3790                 napi_complete(napi);
3791                 niu_ldg_rearm(np, lp, 1);
3792         }
3793         return work_done;
3794 }
3795 
3796 static void niu_log_rxchan_errors(struct niu *np, struct rx_ring_info *rp,
3797                                   u64 stat)
3798 {
3799         netdev_err(np->dev, "RX channel %u errors ( ", rp->rx_channel);
3800 
3801         if (stat & RX_DMA_CTL_STAT_RBR_TMOUT)
3802                 pr_cont("RBR_TMOUT ");
3803         if (stat & RX_DMA_CTL_STAT_RSP_CNT_ERR)
3804                 pr_cont("RSP_CNT ");
3805         if (stat & RX_DMA_CTL_STAT_BYTE_EN_BUS)
3806                 pr_cont("BYTE_EN_BUS ");
3807         if (stat & RX_DMA_CTL_STAT_RSP_DAT_ERR)
3808                 pr_cont("RSP_DAT ");
3809         if (stat & RX_DMA_CTL_STAT_RCR_ACK_ERR)
3810                 pr_cont("RCR_ACK ");
3811         if (stat & RX_DMA_CTL_STAT_RCR_SHA_PAR)
3812                 pr_cont("RCR_SHA_PAR ");
3813         if (stat & RX_DMA_CTL_STAT_RBR_PRE_PAR)
3814                 pr_cont("RBR_PRE_PAR ");
3815         if (stat & RX_DMA_CTL_STAT_CONFIG_ERR)
3816                 pr_cont("CONFIG ");
3817         if (stat & RX_DMA_CTL_STAT_RCRINCON)
3818                 pr_cont("RCRINCON ");
3819         if (stat & RX_DMA_CTL_STAT_RCRFULL)
3820                 pr_cont("RCRFULL ");
3821         if (stat & RX_DMA_CTL_STAT_RBRFULL)
3822                 pr_cont("RBRFULL ");
3823         if (stat & RX_DMA_CTL_STAT_RBRLOGPAGE)
3824                 pr_cont("RBRLOGPAGE ");
3825         if (stat & RX_DMA_CTL_STAT_CFIGLOGPAGE)
3826                 pr_cont("CFIGLOGPAGE ");
3827         if (stat & RX_DMA_CTL_STAT_DC_FIFO_ERR)
3828                 pr_cont("DC_FIDO ");
3829 
3830         pr_cont(")\n");
3831 }
3832 
3833 static int niu_rx_error(struct niu *np, struct rx_ring_info *rp)
3834 {
3835         u64 stat = nr64(RX_DMA_CTL_STAT(rp->rx_channel));
3836         int err = 0;
3837 
3838 
3839         if (stat & (RX_DMA_CTL_STAT_CHAN_FATAL |
3840                     RX_DMA_CTL_STAT_PORT_FATAL))
3841                 err = -EINVAL;
3842 
3843         if (err) {
3844                 netdev_err(np->dev, "RX channel %u error, stat[%llx]\n",
3845                            rp->rx_channel,
3846                            (unsigned long long) stat);
3847 
3848                 niu_log_rxchan_errors(np, rp, stat);
3849         }
3850 
3851         nw64(RX_DMA_CTL_STAT(rp->rx_channel),
3852              stat & RX_DMA_CTL_WRITE_CLEAR_ERRS);
3853 
3854         return err;
3855 }
3856 
3857 static void niu_log_txchan_errors(struct niu *np, struct tx_ring_info *rp,
3858                                   u64 cs)
3859 {
3860         netdev_err(np->dev, "TX channel %u errors ( ", rp->tx_channel);
3861 
3862         if (cs & TX_CS_MBOX_ERR)
3863                 pr_cont("MBOX ");
3864         if (cs & TX_CS_PKT_SIZE_ERR)
3865                 pr_cont("PKT_SIZE ");
3866         if (cs & TX_CS_TX_RING_OFLOW)
3867                 pr_cont("TX_RING_OFLOW ");
3868         if (cs & TX_CS_PREF_BUF_PAR_ERR)
3869                 pr_cont("PREF_BUF_PAR ");
3870         if (cs & TX_CS_NACK_PREF)
3871                 pr_cont("NACK_PREF ");
3872         if (cs & TX_CS_NACK_PKT_RD)
3873                 pr_cont("NACK_PKT_RD ");
3874         if (cs & TX_CS_CONF_PART_ERR)
3875                 pr_cont("CONF_PART ");
3876         if (cs & TX_CS_PKT_PRT_ERR)
3877                 pr_cont("PKT_PTR ");
3878 
3879         pr_cont(")\n");
3880 }
3881 
3882 static int niu_tx_error(struct niu *np, struct tx_ring_info *rp)
3883 {
3884         u64 cs, logh, logl;
3885 
3886         cs = nr64(TX_CS(rp->tx_channel));
3887         logh = nr64(TX_RNG_ERR_LOGH(rp->tx_channel));
3888         logl = nr64(TX_RNG_ERR_LOGL(rp->tx_channel));
3889 
3890         netdev_err(np->dev, "TX channel %u error, cs[%llx] logh[%llx] logl[%llx]\n",
3891                    rp->tx_channel,
3892                    (unsigned long long)cs,
3893                    (unsigned long long)logh,
3894                    (unsigned long long)logl);
3895 
3896         niu_log_txchan_errors(np, rp, cs);
3897 
3898         return -ENODEV;
3899 }
3900 
3901 static int niu_mif_interrupt(struct niu *np)
3902 {
3903         u64 mif_status = nr64(MIF_STATUS);
3904         int phy_mdint = 0;
3905 
3906         if (np->flags & NIU_FLAGS_XMAC) {
3907                 u64 xrxmac_stat = nr64_mac(XRXMAC_STATUS);
3908 
3909                 if (xrxmac_stat & XRXMAC_STATUS_PHY_MDINT)
3910                         phy_mdint = 1;
3911         }
3912 
3913         netdev_err(np->dev, "MIF interrupt, stat[%llx] phy_mdint(%d)\n",
3914                    (unsigned long long)mif_status, phy_mdint);
3915 
3916         return -ENODEV;
3917 }
3918 
3919 static void niu_xmac_interrupt(struct niu *np)
3920 {
3921         struct niu_xmac_stats *mp = &np->mac_stats.xmac;
3922         u64 val;
3923 
3924         val = nr64_mac(XTXMAC_STATUS);
3925         if (val & XTXMAC_STATUS_FRAME_CNT_EXP)
3926                 mp->tx_frames += TXMAC_FRM_CNT_COUNT;
3927         if (val & XTXMAC_STATUS_BYTE_CNT_EXP)
3928                 mp->tx_bytes += TXMAC_BYTE_CNT_COUNT;
3929         if (val & XTXMAC_STATUS_TXFIFO_XFR_ERR)
3930                 mp->tx_fifo_errors++;
3931         if (val & XTXMAC_STATUS_TXMAC_OFLOW)
3932                 mp->tx_overflow_errors++;
3933         if (val & XTXMAC_STATUS_MAX_PSIZE_ERR)
3934                 mp->tx_max_pkt_size_errors++;
3935         if (val & XTXMAC_STATUS_TXMAC_UFLOW)
3936                 mp->tx_underflow_errors++;
3937 
3938         val = nr64_mac(XRXMAC_STATUS);
3939         if (val & XRXMAC_STATUS_LCL_FLT_STATUS)
3940                 mp->rx_local_faults++;
3941         if (val & XRXMAC_STATUS_RFLT_DET)
3942                 mp->rx_remote_faults++;
3943         if (val & XRXMAC_STATUS_LFLT_CNT_EXP)
3944                 mp->rx_link_faults += LINK_FAULT_CNT_COUNT;
3945         if (val & XRXMAC_STATUS_ALIGNERR_CNT_EXP)
3946                 mp->rx_align_errors += RXMAC_ALIGN_ERR_CNT_COUNT;
3947         if (val & XRXMAC_STATUS_RXFRAG_CNT_EXP)
3948                 mp->rx_frags += RXMAC_FRAG_CNT_COUNT;
3949         if (val & XRXMAC_STATUS_RXMULTF_CNT_EXP)
3950                 mp->rx_mcasts += RXMAC_MC_FRM_CNT_COUNT;
3951         if (val & XRXMAC_STATUS_RXBCAST_CNT_EXP)
3952                 mp->rx_bcasts += RXMAC_BC_FRM_CNT_COUNT;
3953         if (val & XRXMAC_STATUS_RXBCAST_CNT_EXP)
3954                 mp->rx_bcasts += RXMAC_BC_FRM_CNT_COUNT;
3955         if (val & XRXMAC_STATUS_RXHIST1_CNT_EXP)
3956                 mp->rx_hist_cnt1 += RXMAC_HIST_CNT1_COUNT;
3957         if (val & XRXMAC_STATUS_RXHIST2_CNT_EXP)
3958                 mp->rx_hist_cnt2 += RXMAC_HIST_CNT2_COUNT;
3959         if (val & XRXMAC_STATUS_RXHIST3_CNT_EXP)
3960                 mp->rx_hist_cnt3 += RXMAC_HIST_CNT3_COUNT;
3961         if (val & XRXMAC_STATUS_RXHIST4_CNT_EXP)
3962                 mp->rx_hist_cnt4 += RXMAC_HIST_CNT4_COUNT;
3963         if (val & XRXMAC_STATUS_RXHIST5_CNT_EXP)
3964                 mp->rx_hist_cnt5 += RXMAC_HIST_CNT5_COUNT;
3965         if (val & XRXMAC_STATUS_RXHIST6_CNT_EXP)
3966                 mp->rx_hist_cnt6 += RXMAC_HIST_CNT6_COUNT;
3967         if (val & XRXMAC_STATUS_RXHIST7_CNT_EXP)
3968                 mp->rx_hist_cnt7 += RXMAC_HIST_CNT7_COUNT;
3969         if (val & XRXMAC_STATUS_RXOCTET_CNT_EXP)
3970                 mp->rx_octets += RXMAC_BT_CNT_COUNT;
3971         if (val & XRXMAC_STATUS_CVIOLERR_CNT_EXP)
3972                 mp->rx_code_violations += RXMAC_CD_VIO_CNT_COUNT;
3973         if (val & XRXMAC_STATUS_LENERR_CNT_EXP)
3974                 mp->rx_len_errors += RXMAC_MPSZER_CNT_COUNT;
3975         if (val & XRXMAC_STATUS_CRCERR_CNT_EXP)
3976                 mp->rx_crc_errors += RXMAC_CRC_ER_CNT_COUNT;
3977         if (val & XRXMAC_STATUS_RXUFLOW)
3978                 mp->rx_underflows++;
3979         if (val & XRXMAC_STATUS_RXOFLOW)
3980                 mp->rx_overflows++;
3981 
3982         val = nr64_mac(XMAC_FC_STAT);
3983         if (val & XMAC_FC_STAT_TX_MAC_NPAUSE)
3984                 mp->pause_off_state++;
3985         if (val & XMAC_FC_STAT_TX_MAC_PAUSE)
3986                 mp->pause_on_state++;
3987         if (val & XMAC_FC_STAT_RX_MAC_RPAUSE)
3988                 mp->pause_received++;
3989 }
3990 
3991 static void niu_bmac_interrupt(struct niu *np)
3992 {
3993         struct niu_bmac_stats *mp = &np->mac_stats.bmac;
3994         u64 val;
3995 
3996         val = nr64_mac(BTXMAC_STATUS);
3997         if (val & BTXMAC_STATUS_UNDERRUN)
3998                 mp->tx_underflow_errors++;
3999         if (val & BTXMAC_STATUS_MAX_PKT_ERR)
4000                 mp->tx_max_pkt_size_errors++;
4001         if (val & BTXMAC_STATUS_BYTE_CNT_EXP)
4002                 mp->tx_bytes += BTXMAC_BYTE_CNT_COUNT;
4003         if (val & BTXMAC_STATUS_FRAME_CNT_EXP)
4004                 mp->tx_frames += BTXMAC_FRM_CNT_COUNT;
4005 
4006         val = nr64_mac(BRXMAC_STATUS);
4007         if (val & BRXMAC_STATUS_OVERFLOW)
4008                 mp->rx_overflows++;
4009         if (val & BRXMAC_STATUS_FRAME_CNT_EXP)
4010                 mp->rx_frames += BRXMAC_FRAME_CNT_COUNT;
4011         if (val & BRXMAC_STATUS_ALIGN_ERR_EXP)
4012                 mp->rx_align_errors += BRXMAC_ALIGN_ERR_CNT_COUNT;
4013         if (val & BRXMAC_STATUS_CRC_ERR_EXP)
4014                 mp->rx_crc_errors += BRXMAC_ALIGN_ERR_CNT_COUNT;
4015         if (val & BRXMAC_STATUS_LEN_ERR_EXP)
4016                 mp->rx_len_errors += BRXMAC_CODE_VIOL_ERR_CNT_COUNT;
4017 
4018         val = nr64_mac(BMAC_CTRL_STATUS);
4019         if (val & BMAC_CTRL_STATUS_NOPAUSE)
4020                 mp->pause_off_state++;
4021         if (val & BMAC_CTRL_STATUS_PAUSE)
4022                 mp->pause_on_state++;
4023         if (val & BMAC_CTRL_STATUS_PAUSE_RECV)
4024                 mp->pause_received++;
4025 }
4026 
4027 static int niu_mac_interrupt(struct niu *np)
4028 {
4029         if (np->flags & NIU_FLAGS_XMAC)
4030                 niu_xmac_interrupt(np);
4031         else
4032                 niu_bmac_interrupt(np);
4033 
4034         return 0;
4035 }
4036 
4037 static void niu_log_device_error(struct niu *np, u64 stat)
4038 {
4039         netdev_err(np->dev, "Core device errors ( ");
4040 
4041         if (stat & SYS_ERR_MASK_META2)
4042                 pr_cont("META2 ");
4043         if (stat & SYS_ERR_MASK_META1)
4044                 pr_cont("META1 ");
4045         if (stat & SYS_ERR_MASK_PEU)
4046                 pr_cont("PEU ");
4047         if (stat & SYS_ERR_MASK_TXC)
4048                 pr_cont("TXC ");
4049         if (stat & SYS_ERR_MASK_RDMC)
4050                 pr_cont("RDMC ");
4051         if (stat & SYS_ERR_MASK_TDMC)
4052                 pr_cont("TDMC ");
4053         if (stat & SYS_ERR_MASK_ZCP)
4054                 pr_cont("ZCP ");
4055         if (stat & SYS_ERR_MASK_FFLP)
4056                 pr_cont("FFLP ");
4057         if (stat & SYS_ERR_MASK_IPP)
4058                 pr_cont("IPP ");
4059         if (stat & SYS_ERR_MASK_MAC)
4060                 pr_cont("MAC ");
4061         if (stat & SYS_ERR_MASK_SMX)
4062                 pr_cont("SMX ");
4063 
4064         pr_cont(")\n");
4065 }
4066 
4067 static int niu_device_error(struct niu *np)
4068 {
4069         u64 stat = nr64(SYS_ERR_STAT);
4070 
4071         netdev_err(np->dev, "Core device error, stat[%llx]\n",
4072                    (unsigned long long)stat);
4073 
4074         niu_log_device_error(np, stat);
4075 
4076         return -ENODEV;
4077 }
4078 
4079 static int niu_slowpath_interrupt(struct niu *np, struct niu_ldg *lp,
4080                               u64 v0, u64 v1, u64 v2)
4081 {
4082 
4083         int i, err = 0;
4084 
4085         lp->v0 = v0;
4086         lp->v1 = v1;
4087         lp->v2 = v2;
4088 
4089         if (v1 & 0x00000000ffffffffULL) {
4090                 u32 rx_vec = (v1 & 0xffffffff);
4091 
4092                 for (i = 0; i < np->num_rx_rings; i++) {
4093                         struct rx_ring_info *rp = &np->rx_rings[i];
4094 
4095                         if (rx_vec & (1 << rp->rx_channel)) {
4096                                 int r = niu_rx_error(np, rp);
4097                                 if (r) {
4098                                         err = r;
4099                                 } else {
4100                                         if (!v0)
4101                                                 nw64(RX_DMA_CTL_STAT(rp->rx_channel),
4102                                                      RX_DMA_CTL_STAT_MEX);
4103                                 }
4104                         }
4105                 }
4106         }
4107         if (v1 & 0x7fffffff00000000ULL) {
4108                 u32 tx_vec = (v1 >> 32) & 0x7fffffff;
4109 
4110                 for (i = 0; i < np->num_tx_rings; i++) {
4111                         struct tx_ring_info *rp = &np->tx_rings[i];
4112 
4113                         if (tx_vec & (1 << rp->tx_channel)) {
4114                                 int r = niu_tx_error(np, rp);
4115                                 if (r)
4116                                         err = r;
4117                         }
4118                 }
4119         }
4120         if ((v0 | v1) & 0x8000000000000000ULL) {
4121                 int r = niu_mif_interrupt(np);
4122                 if (r)
4123                         err = r;
4124         }
4125         if (v2) {
4126                 if (v2 & 0x01ef) {
4127                         int r = niu_mac_interrupt(np);
4128                         if (r)
4129                                 err = r;
4130                 }
4131                 if (v2 & 0x0210) {
4132                         int r = niu_device_error(np);
4133                         if (r)
4134                                 err = r;
4135                 }
4136         }
4137 
4138         if (err)
4139                 niu_enable_interrupts(np, 0);
4140 
4141         return err;
4142 }
4143 
4144 static void niu_rxchan_intr(struct niu *np, struct rx_ring_info *rp,
4145                             int ldn)
4146 {
4147         struct rxdma_mailbox *mbox = rp->mbox;
4148         u64 stat_write, stat = le64_to_cpup(&mbox->rx_dma_ctl_stat);
4149 
4150         stat_write = (RX_DMA_CTL_STAT_RCRTHRES |
4151                       RX_DMA_CTL_STAT_RCRTO);
4152         nw64(RX_DMA_CTL_STAT(rp->rx_channel), stat_write);
4153 
4154         netif_printk(np, intr, KERN_DEBUG, np->dev,
4155                      "%s() stat[%llx]\n", __func__, (unsigned long long)stat);
4156 }
4157 
4158 static void niu_txchan_intr(struct niu *np, struct tx_ring_info *rp,
4159                             int ldn)
4160 {
4161         rp->tx_cs = nr64(TX_CS(rp->tx_channel));
4162 
4163         netif_printk(np, intr, KERN_DEBUG, np->dev,
4164                      "%s() cs[%llx]\n", __func__, (unsigned long long)rp->tx_cs);
4165 }
4166 
4167 static void __niu_fastpath_interrupt(struct niu *np, int ldg, u64 v0)
4168 {
4169         struct niu_parent *parent = np->parent;
4170         u32 rx_vec, tx_vec;
4171         int i;
4172 
4173         tx_vec = (v0 >> 32);
4174         rx_vec = (v0 & 0xffffffff);
4175 
4176         for (i = 0; i < np->num_rx_rings; i++) {
4177                 struct rx_ring_info *rp = &np->rx_rings[i];
4178                 int ldn = LDN_RXDMA(rp->rx_channel);
4179 
4180                 if (parent->ldg_map[ldn] != ldg)
4181                         continue;
4182 
4183                 nw64(LD_IM0(ldn), LD_IM0_MASK);
4184                 if (rx_vec & (1 << rp->rx_channel))
4185                         niu_rxchan_intr(np, rp, ldn);
4186         }
4187 
4188         for (i = 0; i < np->num_tx_rings; i++) {
4189                 struct tx_ring_info *rp = &np->tx_rings[i];
4190                 int ldn = LDN_TXDMA(rp->tx_channel);
4191 
4192                 if (parent->ldg_map[ldn] != ldg)
4193                         continue;
4194 
4195                 nw64(LD_IM0(ldn), LD_IM0_MASK);
4196                 if (tx_vec & (1 << rp->tx_channel))
4197                         niu_txchan_intr(np, rp, ldn);
4198         }
4199 }
4200 
4201 static void niu_schedule_napi(struct niu *np, struct niu_ldg *lp,
4202                               u64 v0, u64 v1, u64 v2)
4203 {
4204         if (likely(napi_schedule_prep(&lp->napi))) {
4205                 lp->v0 = v0;
4206                 lp->v1 = v1;
4207                 lp->v2 = v2;
4208                 __niu_fastpath_interrupt(np, lp->ldg_num, v0);
4209                 __napi_schedule(&lp->napi);
4210         }
4211 }
4212 
4213 static irqreturn_t niu_interrupt(int irq, void *dev_id)
4214 {
4215         struct niu_ldg *lp = dev_id;
4216         struct niu *np = lp->np;
4217         int ldg = lp->ldg_num;
4218         unsigned long flags;
4219         u64 v0, v1, v2;
4220 
4221         if (netif_msg_intr(np))
4222                 printk(KERN_DEBUG KBUILD_MODNAME ": " "%s() ldg[%p](%d)",
4223                        __func__, lp, ldg);
4224 
4225         spin_lock_irqsave(&np->lock, flags);
4226 
4227         v0 = nr64(LDSV0(ldg));
4228         v1 = nr64(LDSV1(ldg));
4229         v2 = nr64(LDSV2(ldg));
4230 
4231         if (netif_msg_intr(np))
4232                 pr_cont(" v0[%llx] v1[%llx] v2[%llx]\n",
4233                        (unsigned long long) v0,
4234                        (unsigned long long) v1,
4235                        (unsigned long long) v2);
4236 
4237         if (unlikely(!v0 && !v1 && !v2)) {
4238                 spin_unlock_irqrestore(&np->lock, flags);
4239                 return IRQ_NONE;
4240         }
4241 
4242         if (unlikely((v0 & ((u64)1 << LDN_MIF)) || v1 || v2)) {
4243                 int err = niu_slowpath_interrupt(np, lp, v0, v1, v2);
4244                 if (err)
4245                         goto out;
4246         }
4247         if (likely(v0 & ~((u64)1 << LDN_MIF)))
4248                 niu_schedule_napi(np, lp, v0, v1, v2);
4249         else
4250                 niu_ldg_rearm(np, lp, 1);
4251 out:
4252         spin_unlock_irqrestore(&np->lock, flags);
4253 
4254         return IRQ_HANDLED;
4255 }
4256 
4257 static void niu_free_rx_ring_info(struct niu *np, struct rx_ring_info *rp)
4258 {
4259         if (rp->mbox) {
4260                 np->ops->free_coherent(np->device,
4261                                        sizeof(struct rxdma_mailbox),
4262                                        rp->mbox, rp->mbox_dma);
4263                 rp->mbox = NULL;
4264         }
4265         if (rp->rcr) {
4266                 np->ops->free_coherent(np->device,
4267                                        MAX_RCR_RING_SIZE * sizeof(__le64),
4268                                        rp->rcr, rp->rcr_dma);
4269                 rp->rcr = NULL;
4270                 rp->rcr_table_size = 0;
4271                 rp->rcr_index = 0;
4272         }
4273         if (rp->rbr) {
4274                 niu_rbr_free(np, rp);
4275 
4276                 np->ops->free_coherent(np->device,
4277                                        MAX_RBR_RING_SIZE * sizeof(__le32),
4278                                        rp->rbr, rp->rbr_dma);
4279                 rp->rbr = NULL;
4280                 rp->rbr_table_size = 0;
4281                 rp->rbr_index = 0;
4282         }
4283         kfree(rp->rxhash);
4284         rp->rxhash = NULL;
4285 }
4286 
4287 static void niu_free_tx_ring_info(struct niu *np, struct tx_ring_info *rp)
4288 {
4289         if (rp->mbox) {
4290                 np->ops->free_coherent(np->device,
4291                                        sizeof(struct txdma_mailbox),
4292                                        rp->mbox, rp->mbox_dma);
4293                 rp->mbox = NULL;
4294         }
4295         if (rp->descr) {
4296                 int i;
4297 
4298                 for (i = 0; i < MAX_TX_RING_SIZE; i++) {
4299                         if (rp->tx_buffs[i].skb)
4300                                 (void) release_tx_packet(np, rp, i);
4301                 }
4302 
4303                 np->ops->free_coherent(np->device,
4304                                        MAX_TX_RING_SIZE * sizeof(__le64),
4305                                        rp->descr, rp->descr_dma);
4306                 rp->descr = NULL;
4307                 rp->pending = 0;
4308                 rp->prod = 0;
4309                 rp->cons = 0;
4310                 rp->wrap_bit = 0;
4311         }
4312 }
4313 
4314 static void niu_free_channels(struct niu *np)
4315 {
4316         int i;
4317 
4318         if (np->rx_rings) {
4319                 for (i = 0; i < np->num_rx_rings; i++) {
4320                         struct rx_ring_info *rp = &np->rx_rings[i];
4321 
4322                         niu_free_rx_ring_info(np, rp);
4323                 }
4324                 kfree(np->rx_rings);
4325                 np->rx_rings = NULL;
4326                 np->num_rx_rings = 0;
4327         }
4328 
4329         if (np->tx_rings) {
4330                 for (i = 0; i < np->num_tx_rings; i++) {
4331                         struct tx_ring_info *rp = &np->tx_rings[i];
4332 
4333                         niu_free_tx_ring_info(np, rp);
4334                 }
4335                 kfree(np->tx_rings);
4336                 np->tx_rings = NULL;
4337                 np->num_tx_rings = 0;
4338         }
4339 }
4340 
4341 static int niu_alloc_rx_ring_info(struct niu *np,
4342                                   struct rx_ring_info *rp)
4343 {
4344         BUILD_BUG_ON(sizeof(struct rxdma_mailbox) != 64);
4345 
4346         rp->rxhash = kcalloc(MAX_RBR_RING_SIZE, sizeof(struct page *),
4347                              GFP_KERNEL);
4348         if (!rp->rxhash)
4349                 return -ENOMEM;
4350 
4351         rp->mbox = np->ops->alloc_coherent(np->device,
4352                                            sizeof(struct rxdma_mailbox),
4353                                            &rp->mbox_dma, GFP_KERNEL);
4354         if (!rp->mbox)
4355                 return -ENOMEM;
4356         if ((unsigned long)rp->mbox & (64UL - 1)) {
4357                 netdev_err(np->dev, "Coherent alloc gives misaligned RXDMA mailbox %p\n",
4358                            rp->mbox);
4359                 return -EINVAL;
4360         }
4361 
4362         rp->rcr = np->ops->alloc_coherent(np->device,
4363                                           MAX_RCR_RING_SIZE * sizeof(__le64),
4364                                           &rp->rcr_dma, GFP_KERNEL);
4365         if (!rp->rcr)
4366                 return -ENOMEM;
4367         if ((unsigned long)rp->rcr & (64UL - 1)) {
4368                 netdev_err(np->dev, "Coherent alloc gives misaligned RXDMA RCR table %p\n",
4369                            rp->rcr);
4370                 return -EINVAL;
4371         }
4372         rp->rcr_table_size = MAX_RCR_RING_SIZE;
4373         rp->rcr_index = 0;
4374 
4375         rp->rbr = np->ops->alloc_coherent(np->device,
4376                                           MAX_RBR_RING_SIZE * sizeof(__le32),
4377                                           &rp->rbr_dma, GFP_KERNEL);
4378         if (!rp->rbr)
4379                 return -ENOMEM;
4380         if ((unsigned long)rp->rbr & (64UL - 1)) {
4381                 netdev_err(np->dev, "Coherent alloc gives misaligned RXDMA RBR table %p\n",
4382                            rp->rbr);
4383                 return -EINVAL;
4384         }
4385         rp->rbr_table_size = MAX_RBR_RING_SIZE;
4386         rp->rbr_index = 0;
4387         rp->rbr_pending = 0;
4388 
4389         return 0;
4390 }
4391 
4392 static void niu_set_max_burst(struct niu *np, struct tx_ring_info *rp)
4393 {
4394         int mtu = np->dev->mtu;
4395 
4396         /* These values are recommended by the HW designers for fair
4397          * utilization of DRR amongst the rings.
4398          */
4399         rp->max_burst = mtu + 32;
4400         if (rp->max_burst > 4096)
4401                 rp->max_burst = 4096;
4402 }
4403 
4404 static int niu_alloc_tx_ring_info(struct niu *np,
4405                                   struct tx_ring_info *rp)
4406 {
4407         BUILD_BUG_ON(sizeof(struct txdma_mailbox) != 64);
4408 
4409         rp->mbox = np->ops->alloc_coherent(np->device,
4410                                            sizeof(struct txdma_mailbox),
4411                                            &rp->mbox_dma, GFP_KERNEL);
4412         if (!rp->mbox)
4413                 return -ENOMEM;
4414         if ((unsigned long)rp->mbox & (64UL - 1)) {
4415                 netdev_err(np->dev, "Coherent alloc gives misaligned TXDMA mailbox %p\n",
4416                            rp->mbox);
4417                 return -EINVAL;
4418         }
4419 
4420         rp->descr = np->ops->alloc_coherent(np->device,
4421                                             MAX_TX_RING_SIZE * sizeof(__le64),
4422                                             &rp->descr_dma, GFP_KERNEL);
4423         if (!rp->descr)
4424                 return -ENOMEM;
4425         if ((unsigned long)rp->descr & (64UL - 1)) {
4426                 netdev_err(np->dev, "Coherent alloc gives misaligned TXDMA descr table %p\n",
4427                            rp->descr);
4428                 return -EINVAL;
4429         }
4430 
4431         rp->pending = MAX_TX_RING_SIZE;
4432         rp->prod = 0;
4433         rp->cons = 0;
4434         rp->wrap_bit = 0;
4435 
4436         /* XXX make these configurable... XXX */
4437         rp->mark_freq = rp->pending / 4;
4438 
4439         niu_set_max_burst(np, rp);
4440 
4441         return 0;
4442 }
4443 
4444 static void niu_size_rbr(struct niu *np, struct rx_ring_info *rp)
4445 {
4446         u16 bss;
4447 
4448         bss = min(PAGE_SHIFT, 15);
4449 
4450         rp->rbr_block_size = 1 << bss;
4451         rp->rbr_blocks_per_page = 1 << (PAGE_SHIFT-bss);
4452 
4453         rp->rbr_sizes[0] = 256;
4454         rp->rbr_sizes[1] = 1024;
4455         if (np->dev->mtu > ETH_DATA_LEN) {
4456                 switch (PAGE_SIZE) {
4457                 case 4 * 1024:
4458                         rp->rbr_sizes[2] = 4096;
4459                         break;
4460 
4461                 default:
4462                         rp->rbr_sizes[2] = 8192;
4463                         break;
4464                 }
4465         } else {
4466                 rp->rbr_sizes[2] = 2048;
4467         }
4468         rp->rbr_sizes[3] = rp->rbr_block_size;
4469 }
4470 
4471 static int niu_alloc_channels(struct niu *np)
4472 {
4473         struct niu_parent *parent = np->parent;
4474         int first_rx_channel, first_tx_channel;
4475         int num_rx_rings, num_tx_rings;
4476         struct rx_ring_info *rx_rings;
4477         struct tx_ring_info *tx_rings;
4478         int i, port, err;
4479 
4480         port = np->port;
4481         first_rx_channel = first_tx_channel = 0;
4482         for (i = 0; i < port; i++) {
4483                 first_rx_channel += parent->rxchan_per_port[i];
4484                 first_tx_channel += parent->txchan_per_port[i];
4485         }
4486 
4487         num_rx_rings = parent->rxchan_per_port[port];
4488         num_tx_rings = parent->txchan_per_port[port];
4489 
4490         rx_rings = kcalloc(num_rx_rings, sizeof(struct rx_ring_info),
4491                            GFP_KERNEL);
4492         err = -ENOMEM;
4493         if (!rx_rings)
4494                 goto out_err;
4495 
4496         np->num_rx_rings = num_rx_rings;
4497         smp_wmb();
4498         np->rx_rings = rx_rings;
4499 
4500         netif_set_real_num_rx_queues(np->dev, num_rx_rings);
4501 
4502         for (i = 0; i < np->num_rx_rings; i++) {
4503                 struct rx_ring_info *rp = &np->rx_rings[i];
4504 
4505                 rp->np = np;
4506                 rp->rx_channel = first_rx_channel + i;
4507 
4508                 err = niu_alloc_rx_ring_info(np, rp);
4509                 if (err)
4510                         goto out_err;
4511 
4512                 niu_size_rbr(np, rp);
4513 
4514                 /* XXX better defaults, configurable, etc... XXX */
4515                 rp->nonsyn_window = 64;
4516                 rp->nonsyn_threshold = rp->rcr_table_size - 64;
4517                 rp->syn_window = 64;
4518                 rp->syn_threshold = rp->rcr_table_size - 64;
4519                 rp->rcr_pkt_threshold = 16;
4520                 rp->rcr_timeout = 8;
4521                 rp->rbr_kick_thresh = RBR_REFILL_MIN;
4522                 if (rp->rbr_kick_thresh < rp->rbr_blocks_per_page)
4523                         rp->rbr_kick_thresh = rp->rbr_blocks_per_page;
4524 
4525                 err = niu_rbr_fill(np, rp, GFP_KERNEL);
4526                 if (err)
4527                         return err;
4528         }
4529 
4530         tx_rings = kcalloc(num_tx_rings, sizeof(struct tx_ring_info),
4531                            GFP_KERNEL);
4532         err = -ENOMEM;
4533         if (!tx_rings)
4534                 goto out_err;
4535 
4536         np->num_tx_rings = num_tx_rings;
4537         smp_wmb();
4538         np->tx_rings = tx_rings;
4539 
4540         netif_set_real_num_tx_queues(np->dev, num_tx_rings);
4541 
4542         for (i = 0; i < np->num_tx_rings; i++) {
4543                 struct tx_ring_info *rp = &np->tx_rings[i];
4544 
4545                 rp->np = np;
4546                 rp->tx_channel = first_tx_channel + i;
4547 
4548                 err = niu_alloc_tx_ring_info(np, rp);
4549                 if (err)
4550                         goto out_err;
4551         }
4552 
4553         return 0;
4554 
4555 out_err:
4556         niu_free_channels(np);
4557         return err;
4558 }
4559 
4560 static int niu_tx_cs_sng_poll(struct niu *np, int channel)
4561 {
4562         int limit = 1000;
4563 
4564         while (--limit > 0) {
4565                 u64 val = nr64(TX_CS(channel));
4566                 if (val & TX_CS_SNG_STATE)
4567                         return 0;
4568         }
4569         return -ENODEV;
4570 }
4571 
4572 static int niu_tx_channel_stop(struct niu *np, int channel)
4573 {
4574         u64 val = nr64(TX_CS(channel));
4575 
4576         val |= TX_CS_STOP_N_GO;
4577         nw64(TX_CS(channel), val);
4578 
4579         return niu_tx_cs_sng_poll(np, channel);
4580 }
4581 
4582 static int niu_tx_cs_reset_poll(struct niu *np, int channel)
4583 {
4584         int limit = 1000;
4585 
4586         while (--limit > 0) {
4587                 u64 val = nr64(TX_CS(channel));
4588                 if (!(val & TX_CS_RST))
4589                         return 0;
4590         }
4591         return -ENODEV;
4592 }
4593 
4594 static int niu_tx_channel_reset(struct niu *np, int channel)
4595 {
4596         u64 val = nr64(TX_CS(channel));
4597         int err;
4598 
4599         val |= TX_CS_RST;
4600         nw64(TX_CS(channel), val);
4601 
4602         err = niu_tx_cs_reset_poll(np, channel);
4603         if (!err)
4604                 nw64(TX_RING_KICK(channel), 0);
4605 
4606         return err;
4607 }
4608 
4609 static int niu_tx_channel_lpage_init(struct niu *np, int channel)
4610 {
4611         u64 val;
4612 
4613         nw64(TX_LOG_MASK1(channel), 0);
4614         nw64(TX_LOG_VAL1(channel), 0);
4615         nw64(TX_LOG_MASK2(channel), 0);
4616         nw64(TX_LOG_VAL2(channel), 0);
4617         nw64(TX_LOG_PAGE_RELO1(channel), 0);
4618         nw64(TX_LOG_PAGE_RELO2(channel), 0);
4619         nw64(TX_LOG_PAGE_HDL(channel), 0);
4620 
4621         val  = (u64)np->port << TX_LOG_PAGE_VLD_FUNC_SHIFT;
4622         val |= (TX_LOG_PAGE_VLD_PAGE0 | TX_LOG_PAGE_VLD_PAGE1);
4623         nw64(TX_LOG_PAGE_VLD(channel), val);
4624 
4625         /* XXX TXDMA 32bit mode? XXX */
4626 
4627         return 0;
4628 }
4629 
4630 static void niu_txc_enable_port(struct niu *np, int on)
4631 {
4632         unsigned long flags;
4633         u64 val, mask;
4634 
4635         niu_lock_parent(np, flags);
4636         val = nr64(TXC_CONTROL);
4637         mask = (u64)1 << np->port;
4638         if (on) {
4639                 val |= TXC_CONTROL_ENABLE | mask;
4640         } else {
4641                 val &= ~mask;
4642                 if ((val & ~TXC_CONTROL_ENABLE) == 0)
4643                         val &= ~TXC_CONTROL_ENABLE;
4644         }
4645         nw64(TXC_CONTROL, val);
4646         niu_unlock_parent(np, flags);
4647 }
4648 
4649 static void niu_txc_set_imask(struct niu *np, u64 imask)
4650 {
4651         unsigned long flags;
4652         u64 val;
4653 
4654         niu_lock_parent(np, flags);
4655         val = nr64(TXC_INT_MASK);
4656         val &= ~TXC_INT_MASK_VAL(np->port);
4657         val |= (imask << TXC_INT_MASK_VAL_SHIFT(np->port));
4658         niu_unlock_parent(np, flags);
4659 }
4660 
4661 static void niu_txc_port_dma_enable(struct niu *np, int on)
4662 {
4663         u64 val = 0;
4664 
4665         if (on) {
4666                 int i;
4667 
4668                 for (i = 0; i < np->num_tx_rings; i++)
4669                         val |= (1 << np->tx_rings[i].tx_channel);
4670         }
4671         nw64(TXC_PORT_DMA(np->port), val);
4672 }
4673 
4674 static int niu_init_one_tx_channel(struct niu *np, struct tx_ring_info *rp)
4675 {
4676         int err, channel = rp->tx_channel;
4677         u64 val, ring_len;
4678 
4679         err = niu_tx_channel_stop(np, channel);
4680         if (err)
4681                 return err;
4682 
4683         err = niu_tx_channel_reset(np, channel);
4684         if (err)
4685                 return err;
4686 
4687         err = niu_tx_channel_lpage_init(np, channel);
4688         if (err)
4689                 return err;
4690 
4691         nw64(TXC_DMA_MAX(channel), rp->max_burst);
4692         nw64(TX_ENT_MSK(channel), 0);
4693 
4694         if (rp->descr_dma & ~(TX_RNG_CFIG_STADDR_BASE |
4695                               TX_RNG_CFIG_STADDR)) {
4696                 netdev_err(np->dev, "TX ring channel %d DMA addr (%llx) is not aligned\n",
4697                            channel, (unsigned long long)rp->descr_dma);
4698                 return -EINVAL;
4699         }
4700 
4701         /* The length field in TX_RNG_CFIG is measured in 64-byte
4702          * blocks.  rp->pending is the number of TX descriptors in
4703          * our ring, 8 bytes each, thus we divide by 8 bytes more
4704          * to get the proper value the chip wants.
4705          */
4706         ring_len = (rp->pending / 8);
4707 
4708         val = ((ring_len << TX_RNG_CFIG_LEN_SHIFT) |
4709                rp->descr_dma);
4710         nw64(TX_RNG_CFIG(channel), val);
4711 
4712         if (((rp->mbox_dma >> 32) & ~TXDMA_MBH_MBADDR) ||
4713             ((u32)rp->mbox_dma & ~TXDMA_MBL_MBADDR)) {
4714                 netdev_err(np->dev, "TX ring channel %d MBOX addr (%llx) has invalid bits\n",
4715                             channel, (unsigned long long)rp->mbox_dma);
4716                 return -EINVAL;
4717         }
4718         nw64(TXDMA_MBH(channel), rp->mbox_dma >> 32);
4719         nw64(TXDMA_MBL(channel), rp->mbox_dma & TXDMA_MBL_MBADDR);
4720 
4721         nw64(TX_CS(channel), 0);
4722 
4723         rp->last_pkt_cnt = 0;
4724 
4725         return 0;
4726 }
4727 
4728 static void niu_init_rdc_groups(struct niu *np)
4729 {
4730         struct niu_rdc_tables *tp = &np->parent->rdc_group_cfg[np->port];
4731         int i, first_table_num = tp->first_table_num;
4732 
4733         for (i = 0; i < tp->num_tables; i++) {
4734                 struct rdc_table *tbl = &tp->tables[i];
4735                 int this_table = first_table_num + i;
4736                 int slot;
4737 
4738                 for (slot = 0; slot < NIU_RDC_TABLE_SLOTS; slot++)
4739                         nw64(RDC_TBL(this_table, slot),
4740                              tbl->rxdma_channel[slot]);
4741         }
4742 
4743         nw64(DEF_RDC(np->port), np->parent->rdc_default[np->port]);
4744 }
4745 
4746 static void niu_init_drr_weight(struct niu *np)
4747 {
4748         int type = phy_decode(np->parent->port_phy, np->port);
4749         u64 val;
4750 
4751         switch (type) {
4752         case PORT_TYPE_10G:
4753                 val = PT_DRR_WEIGHT_DEFAULT_10G;
4754                 break;
4755 
4756         case PORT_TYPE_1G:
4757         default:
4758                 val = PT_DRR_WEIGHT_DEFAULT_1G;
4759                 break;
4760         }
4761         nw64(PT_DRR_WT(np->port), val);
4762 }
4763 
4764 static int niu_init_hostinfo(struct niu *np)
4765 {
4766         struct niu_parent *parent = np->parent;
4767         struct niu_rdc_tables *tp = &parent->rdc_group_cfg[np->port];
4768         int i, err, num_alt = niu_num_alt_addr(np);
4769         int first_rdc_table = tp->first_table_num;
4770 
4771         err = niu_set_primary_mac_rdc_table(np, first_rdc_table, 1);
4772         if (err)
4773                 return err;
4774 
4775         err = niu_set_multicast_mac_rdc_table(np, first_rdc_table, 1);
4776         if (err)
4777                 return err;
4778 
4779         for (i = 0; i < num_alt; i++) {
4780                 err = niu_set_alt_mac_rdc_table(np, i, first_rdc_table, 1);
4781                 if (err)
4782                         return err;
4783         }
4784 
4785         return 0;
4786 }
4787 
4788 static int niu_rx_channel_reset(struct niu *np, int channel)
4789 {
4790         return niu_set_and_wait_clear(np, RXDMA_CFIG1(channel),
4791                                       RXDMA_CFIG1_RST, 1000, 10,
4792                                       "RXDMA_CFIG1");
4793 }
4794 
4795 static int niu_rx_channel_lpage_init(struct niu *np, int channel)
4796 {
4797         u64 val;
4798 
4799         nw64(RX_LOG_MASK1(channel), 0);
4800         nw64(RX_LOG_VAL1(channel), 0);
4801         nw64(RX_LOG_MASK2(channel), 0);
4802         nw64(RX_LOG_VAL2(channel), 0);
4803         nw64(RX_LOG_PAGE_RELO1(channel), 0);
4804         nw64(RX_LOG_PAGE_RELO2(channel), 0);
4805         nw64(RX_LOG_PAGE_HDL(channel), 0);
4806 
4807         val  = (u64)np->port << RX_LOG_PAGE_VLD_FUNC_SHIFT;
4808         val |= (RX_LOG_PAGE_VLD_PAGE0 | RX_LOG_PAGE_VLD_PAGE1);
4809         nw64(RX_LOG_PAGE_VLD(channel), val);
4810 
4811         return 0;
4812 }
4813 
4814 static void niu_rx_channel_wred_init(struct niu *np, struct rx_ring_info *rp)
4815 {
4816         u64 val;
4817 
4818         val = (((u64)rp->nonsyn_window << RDC_RED_PARA_WIN_SHIFT) |
4819                ((u64)rp->nonsyn_threshold << RDC_RED_PARA_THRE_SHIFT) |
4820                ((u64)rp->syn_window << RDC_RED_PARA_WIN_SYN_SHIFT) |
4821                ((u64)rp->syn_threshold << RDC_RED_PARA_THRE_SYN_SHIFT));
4822         nw64(RDC_RED_PARA(rp->rx_channel), val);
4823 }
4824 
4825 static int niu_compute_rbr_cfig_b(struct rx_ring_info *rp, u64 *ret)
4826 {
4827         u64 val = 0;
4828 
4829         *ret = 0;
4830         switch (rp->rbr_block_size) {
4831         case 4 * 1024:
4832                 val |= (RBR_BLKSIZE_4K << RBR_CFIG_B_BLKSIZE_SHIFT);
4833                 break;
4834         case 8 * 1024:
4835                 val |= (RBR_BLKSIZE_8K << RBR_CFIG_B_BLKSIZE_SHIFT);
4836                 break;
4837         case 16 * 1024:
4838                 val |= (RBR_BLKSIZE_16K << RBR_CFIG_B_BLKSIZE_SHIFT);
4839                 break;
4840         case 32 * 1024:
4841                 val |= (RBR_BLKSIZE_32K << RBR_CFIG_B_BLKSIZE_SHIFT);
4842                 break;
4843         default:
4844                 return -EINVAL;
4845         }
4846         val |= RBR_CFIG_B_VLD2;
4847         switch (rp->rbr_sizes[2]) {
4848         case 2 * 1024:
4849                 val |= (RBR_BUFSZ2_2K << RBR_CFIG_B_BUFSZ2_SHIFT);
4850                 break;
4851         case 4 * 1024:
4852                 val |= (RBR_BUFSZ2_4K << RBR_CFIG_B_BUFSZ2_SHIFT);
4853                 break;
4854         case 8 * 1024:
4855                 val |= (RBR_BUFSZ2_8K << RBR_CFIG_B_BUFSZ2_SHIFT);
4856                 break;
4857         case 16 * 1024:
4858                 val |= (RBR_BUFSZ2_16K << RBR_CFIG_B_BUFSZ2_SHIFT);
4859                 break;
4860 
4861         default:
4862                 return -EINVAL;
4863         }
4864         val |= RBR_CFIG_B_VLD1;
4865         switch (rp->rbr_sizes[1]) {
4866         case 1 * 1024:
4867                 val |= (RBR_BUFSZ1_1K << RBR_CFIG_B_BUFSZ1_SHIFT);
4868                 break;
4869         case 2 * 1024:
4870                 val |= (RBR_BUFSZ1_2K << RBR_CFIG_B_BUFSZ1_SHIFT);
4871                 break;
4872         case 4 * 1024:
4873                 val |= (RBR_BUFSZ1_4K << RBR_CFIG_B_BUFSZ1_SHIFT);
4874                 break;
4875         case 8 * 1024:
4876                 val |= (RBR_BUFSZ1_8K << RBR_CFIG_B_BUFSZ1_SHIFT);
4877                 break;
4878 
4879         default:
4880                 return -EINVAL;
4881         }
4882         val |= RBR_CFIG_B_VLD0;
4883         switch (rp->rbr_sizes[0]) {
4884         case 256:
4885                 val |= (RBR_BUFSZ0_256 << RBR_CFIG_B_BUFSZ0_SHIFT);
4886                 break;
4887         case 512:
4888                 val |= (RBR_BUFSZ0_512 << RBR_CFIG_B_BUFSZ0_SHIFT);
4889                 break;
4890         case 1 * 1024:
4891                 val |= (RBR_BUFSZ0_1K << RBR_CFIG_B_BUFSZ0_SHIFT);
4892                 break;
4893         case 2 * 1024:
4894                 val |= (RBR_BUFSZ0_2K << RBR_CFIG_B_BUFSZ0_SHIFT);
4895                 break;
4896 
4897         default:
4898                 return -EINVAL;
4899         }
4900 
4901         *ret = val;
4902         return 0;
4903 }
4904 
4905 static int niu_enable_rx_channel(struct niu *np, int channel, int on)
4906 {
4907         u64 val = nr64(RXDMA_CFIG1(channel));
4908         int limit;
4909 
4910         if (on)
4911                 val |= RXDMA_CFIG1_EN;
4912         else
4913                 val &= ~RXDMA_CFIG1_EN;
4914         nw64(RXDMA_CFIG1(channel), val);
4915 
4916         limit = 1000;
4917         while (--limit > 0) {
4918                 if (nr64(RXDMA_CFIG1(channel)) & RXDMA_CFIG1_QST)
4919                         break;
4920                 udelay(10);
4921         }
4922         if (limit <= 0)
4923                 return -ENODEV;
4924         return 0;
4925 }
4926 
4927 static int niu_init_one_rx_channel(struct niu *np, struct rx_ring_info *rp)
4928 {
4929         int err, channel = rp->rx_channel;
4930         u64 val;
4931 
4932         err = niu_rx_channel_reset(np, channel);
4933         if (err)
4934                 return err;
4935 
4936         err = niu_rx_channel_lpage_init(np, channel);
4937         if (err)
4938                 return err;
4939 
4940         niu_rx_channel_wred_init(np, rp);
4941 
4942         nw64(RX_DMA_ENT_MSK(channel), RX_DMA_ENT_MSK_RBR_EMPTY);
4943         nw64(RX_DMA_CTL_STAT(channel),
4944              (RX_DMA_CTL_STAT_MEX |
4945               RX_DMA_CTL_STAT_RCRTHRES |
4946               RX_DMA_CTL_STAT_RCRTO |
4947               RX_DMA_CTL_STAT_RBR_EMPTY));
4948         nw64(RXDMA_CFIG1(channel), rp->mbox_dma >> 32);
4949         nw64(RXDMA_CFIG2(channel),
4950              ((rp->mbox_dma & RXDMA_CFIG2_MBADDR_L) |
4951               RXDMA_CFIG2_FULL_HDR));
4952         nw64(RBR_CFIG_A(channel),
4953              ((u64)rp->rbr_table_size << RBR_CFIG_A_LEN_SHIFT) |
4954              (rp->rbr_dma & (RBR_CFIG_A_STADDR_BASE | RBR_CFIG_A_STADDR)));
4955         err = niu_compute_rbr_cfig_b(rp, &val);
4956         if (err)
4957                 return err;
4958         nw64(RBR_CFIG_B(channel), val);
4959         nw64(RCRCFIG_A(channel),
4960              ((u64)rp->rcr_table_size << RCRCFIG_A_LEN_SHIFT) |
4961              (rp->rcr_dma & (RCRCFIG_A_STADDR_BASE | RCRCFIG_A_STADDR)));
4962         nw64(RCRCFIG_B(channel),
4963              ((u64)rp->rcr_pkt_threshold << RCRCFIG_B_PTHRES_SHIFT) |
4964              RCRCFIG_B_ENTOUT |
4965              ((u64)rp->rcr_timeout << RCRCFIG_B_TIMEOUT_SHIFT));
4966 
4967         err = niu_enable_rx_channel(np, channel, 1);
4968         if (err)
4969                 return err;
4970 
4971         nw64(RBR_KICK(channel), rp->rbr_index);
4972 
4973         val = nr64(RX_DMA_CTL_STAT(channel));
4974         val |= RX_DMA_CTL_STAT_RBR_EMPTY;
4975         nw64(RX_DMA_CTL_STAT(channel), val);
4976 
4977         return 0;
4978 }
4979 
4980 static int niu_init_rx_channels(struct niu *np)
4981 {
4982         unsigned long flags;
4983         u64 seed = jiffies_64;
4984         int err, i;
4985 
4986         niu_lock_parent(np, flags);
4987         nw64(RX_DMA_CK_DIV, np->parent->rxdma_clock_divider);
4988         nw64(RED_RAN_INIT, RED_RAN_INIT_OPMODE | (seed & RED_RAN_INIT_VAL));
4989         niu_unlock_parent(np, flags);
4990 
4991         /* XXX RXDMA 32bit mode? XXX */
4992 
4993         niu_init_rdc_groups(np);
4994         niu_init_drr_weight(np);
4995 
4996         err = niu_init_hostinfo(np);
4997         if (err)
4998                 return err;
4999 
5000         for (i = 0; i < np->num_rx_rings; i++) {
5001                 struct rx_ring_info *rp = &np->rx_rings[i];
5002 
5003                 err = niu_init_one_rx_channel(np, rp);
5004                 if (err)
5005                         return err;
5006         }
5007 
5008         return 0;
5009 }
5010 
5011 static int niu_set_ip_frag_rule(struct niu *np)
5012 {
5013         struct niu_parent *parent = np->parent;
5014         struct niu_classifier *cp = &np->clas;
5015         struct niu_tcam_entry *tp;
5016         int index, err;
5017 
5018         index = cp->tcam_top;
5019         tp = &parent->tcam[index];
5020 
5021         /* Note that the noport bit is the same in both ipv4 and
5022          * ipv6 format TCAM entries.
5023          */
5024         memset(tp, 0, sizeof(*tp));
5025         tp->key[1] = TCAM_V4KEY1_NOPORT;
5026         tp->key_mask[1] = TCAM_V4KEY1_NOPORT;
5027         tp->assoc_data = (TCAM_ASSOCDATA_TRES_USE_OFFSET |
5028                           ((u64)0 << TCAM_ASSOCDATA_OFFSET_SHIFT));
5029         err = tcam_write(np, index, tp->key, tp->key_mask);
5030         if (err)
5031                 return err;
5032         err = tcam_assoc_write(np, index, tp->assoc_data);
5033         if (err)
5034                 return err;
5035         tp->valid = 1;
5036         cp->tcam_valid_entries++;
5037 
5038         return 0;
5039 }
5040 
5041 static int niu_init_classifier_hw(struct niu *np)
5042 {
5043         struct niu_parent *parent = np->parent;
5044         struct niu_classifier *cp = &np->clas;
5045         int i, err;
5046 
5047         nw64(H1POLY, cp->h1_init);
5048         nw64(H2POLY, cp->h2_init);
5049 
5050         err = niu_init_hostinfo(np);
5051         if (err)
5052                 return err;
5053 
5054         for (i = 0; i < ENET_VLAN_TBL_NUM_ENTRIES; i++) {
5055                 struct niu_vlan_rdc *vp = &cp->vlan_mappings[i];
5056 
5057                 vlan_tbl_write(np, i, np->port,
5058                                vp->vlan_pref, vp->rdc_num);
5059         }
5060 
5061         for (i = 0; i < cp->num_alt_mac_mappings; i++) {
5062                 struct niu_altmac_rdc *ap = &cp->alt_mac_mappings[i];
5063 
5064                 err = niu_set_alt_mac_rdc_table(np, ap->alt_mac_num,
5065                                                 ap->rdc_num, ap->mac_pref);
5066                 if (err)
5067                         return err;
5068         }
5069 
5070         for (i = CLASS_CODE_USER_PROG1; i <= CLASS_CODE_SCTP_IPV6; i++) {
5071                 int index = i - CLASS_CODE_USER_PROG1;
5072 
5073                 err = niu_set_tcam_key(np, i, parent->tcam_key[index]);
5074                 if (err)
5075                         return err;
5076                 err = niu_set_flow_key(np, i, parent->flow_key[index]);
5077                 if (err)
5078                         return err;
5079         }
5080 
5081         err = niu_set_ip_frag_rule(np);
5082         if (err)
5083                 return err;
5084 
5085         tcam_enable(np, 1);
5086 
5087         return 0;
5088 }
5089 
5090 static int niu_zcp_write(struct niu *np, int index, u64 *data)
5091 {
5092         nw64(ZCP_RAM_DATA0, data[0]);
5093         nw64(ZCP_RAM_DATA1, data[1]);
5094         nw64(ZCP_RAM_DATA2, data[2]);
5095         nw64(ZCP_RAM_DATA3, data[3]);
5096         nw64(ZCP_RAM_DATA4, data[4]);
5097         nw64(ZCP_RAM_BE, ZCP_RAM_BE_VAL);
5098         nw64(ZCP_RAM_ACC,
5099              (ZCP_RAM_ACC_WRITE |
5100               (0 << ZCP_RAM_ACC_ZFCID_SHIFT) |
5101               (ZCP_RAM_SEL_CFIFO(np->port) << ZCP_RAM_ACC_RAM_SEL_SHIFT)));
5102 
5103         return niu_wait_bits_clear(np, ZCP_RAM_ACC, ZCP_RAM_ACC_BUSY,
5104                                    1000, 100);
5105 }
5106 
5107 static int niu_zcp_read(struct niu *np, int index, u64 *data)
5108 {
5109         int err;
5110 
5111         err = niu_wait_bits_clear(np, ZCP_RAM_ACC, ZCP_RAM_ACC_BUSY,
5112                                   1000, 100);
5113         if (err) {
5114                 netdev_err(np->dev, "ZCP read busy won't clear, ZCP_RAM_ACC[%llx]\n",
5115                            (unsigned long long)nr64(ZCP_RAM_ACC));
5116                 return err;
5117         }
5118 
5119         nw64(ZCP_RAM_ACC,
5120              (ZCP_RAM_ACC_READ |
5121               (0 << ZCP_RAM_ACC_ZFCID_SHIFT) |
5122               (ZCP_RAM_SEL_CFIFO(np->port) << ZCP_RAM_ACC_RAM_SEL_SHIFT)));
5123 
5124         err = niu_wait_bits_clear(np, ZCP_RAM_ACC, ZCP_RAM_ACC_BUSY,
5125                                   1000, 100);
5126         if (err) {
5127                 netdev_err(np->dev, "ZCP read busy2 won't clear, ZCP_RAM_ACC[%llx]\n",
5128                            (unsigned long long)nr64(ZCP_RAM_ACC));
5129                 return err;
5130         }
5131 
5132         data[0] = nr64(ZCP_RAM_DATA0);
5133         data[1] = nr64(ZCP_RAM_DATA1);
5134         data[2] = nr64(ZCP_RAM_DATA2);
5135         data[3] = nr64(ZCP_RAM_DATA3);
5136         data[4] = nr64(ZCP_RAM_DATA4);
5137 
5138         return 0;
5139 }
5140 
5141 static void niu_zcp_cfifo_reset(struct niu *np)
5142 {
5143         u64 val = nr64(RESET_CFIFO);
5144 
5145         val |= RESET_CFIFO_RST(np->port);
5146         nw64(RESET_CFIFO, val);
5147         udelay(10);
5148 
5149         val &= ~RESET_CFIFO_RST(np->port);
5150         nw64(RESET_CFIFO, val);
5151 }
5152 
5153 static int niu_init_zcp(struct niu *np)
5154 {
5155         u64 data[5], rbuf[5];
5156         int i, max, err;
5157 
5158         if (np->parent->plat_type != PLAT_TYPE_NIU) {
5159                 if (np->port == 0 || np->port == 1)
5160                         max = ATLAS_P0_P1_CFIFO_ENTRIES;
5161                 else
5162                         max = ATLAS_P2_P3_CFIFO_ENTRIES;
5163         } else
5164                 max = NIU_CFIFO_ENTRIES;
5165 
5166         data[0] = 0;
5167         data[1] = 0;
5168         data[2] = 0;
5169         data[3] = 0;
5170         data[4] = 0;
5171 
5172         for (i = 0; i < max; i++) {
5173                 err = niu_zcp_write(np, i, data);
5174                 if (err)
5175                         return err;
5176                 err = niu_zcp_read(np, i, rbuf);
5177                 if (err)
5178                         return err;
5179         }
5180 
5181         niu_zcp_cfifo_reset(np);
5182         nw64(CFIFO_ECC(np->port), 0);
5183         nw64(ZCP_INT_STAT, ZCP_INT_STAT_ALL);
5184         (void) nr64(ZCP_INT_STAT);
5185         nw64(ZCP_INT_MASK, ZCP_INT_MASK_ALL);
5186 
5187         return 0;
5188 }
5189 
5190 static void niu_ipp_write(struct niu *np, int index, u64 *data)
5191 {
5192         u64 val = nr64_ipp(IPP_CFIG);
5193 
5194         nw64_ipp(IPP_CFIG, val | IPP_CFIG_DFIFO_PIO_W);
5195         nw64_ipp(IPP_DFIFO_WR_PTR, index);
5196         nw64_ipp(IPP_DFIFO_WR0, data[0]);
5197         nw64_ipp(IPP_DFIFO_WR1, data[1]);
5198         nw64_ipp(IPP_DFIFO_WR2, data[2]);
5199         nw64_ipp(IPP_DFIFO_WR3, data[3]);
5200         nw64_ipp(IPP_DFIFO_WR4, data[4]);
5201         nw64_ipp(IPP_CFIG, val & ~IPP_CFIG_DFIFO_PIO_W);
5202 }
5203 
5204 static void niu_ipp_read(struct niu *np, int index, u64 *data)
5205 {
5206         nw64_ipp(IPP_DFIFO_RD_PTR, index);
5207         data[0] = nr64_ipp(IPP_DFIFO_RD0);
5208         data[1] = nr64_ipp(IPP_DFIFO_RD1);
5209         data[2] = nr64_ipp(IPP_DFIFO_RD2);
5210         data[3] = nr64_ipp(IPP_DFIFO_RD3);
5211         data[4] = nr64_ipp(IPP_DFIFO_RD4);
5212 }
5213 
5214 static int niu_ipp_reset(struct niu *np)
5215 {
5216         return niu_set_and_wait_clear_ipp(np, IPP_CFIG, IPP_CFIG_SOFT_RST,
5217                                           1000, 100, "IPP_CFIG");
5218 }
5219 
5220 static int niu_init_ipp(struct niu *np)
5221 {
5222         u64 data[5], rbuf[5], val;
5223         int i, max, err;
5224 
5225         if (np->parent->plat_type != PLAT_TYPE_NIU) {
5226                 if (np->port == 0 || np->port == 1)
5227                         max = ATLAS_P0_P1_DFIFO_ENTRIES;
5228                 else
5229                         max = ATLAS_P2_P3_DFIFO_ENTRIES;
5230         } else
5231                 max = NIU_DFIFO_ENTRIES;
5232 
5233         data[0] = 0;
5234         data[1] = 0;
5235         data[2] = 0;
5236         data[3] = 0;
5237         data[4] = 0;
5238 
5239         for (i = 0; i < max; i++) {
5240                 niu_ipp_write(np, i, data);
5241                 niu_ipp_read(np, i, rbuf);
5242         }
5243 
5244         (void) nr64_ipp(IPP_INT_STAT);
5245         (void) nr64_ipp(IPP_INT_STAT);
5246 
5247         err = niu_ipp_reset(np);
5248         if (err)
5249                 return err;
5250 
5251         (void) nr64_ipp(IPP_PKT_DIS);
5252         (void) nr64_ipp(IPP_BAD_CS_CNT);
5253         (void) nr64_ipp(IPP_ECC);
5254 
5255         (void) nr64_ipp(IPP_INT_STAT);
5256 
5257         nw64_ipp(IPP_MSK, ~IPP_MSK_ALL);
5258 
5259         val = nr64_ipp(IPP_CFIG);
5260         val &= ~IPP_CFIG_IP_MAX_PKT;
5261         val |= (IPP_CFIG_IPP_ENABLE |
5262                 IPP_CFIG_DFIFO_ECC_EN |
5263                 IPP_CFIG_DROP_BAD_CRC |
5264                 IPP_CFIG_CKSUM_EN |
5265                 (0x1ffff << IPP_CFIG_IP_MAX_PKT_SHIFT));
5266         nw64_ipp(IPP_CFIG, val);
5267 
5268         return 0;
5269 }
5270 
5271 static void niu_handle_led(struct niu *np, int status)
5272 {
5273         u64 val;
5274         val = nr64_mac(XMAC_CONFIG);
5275 
5276         if ((np->flags & NIU_FLAGS_10G) != 0 &&
5277             (np->flags & NIU_FLAGS_FIBER) != 0) {
5278                 if (status) {
5279                         val |= XMAC_CONFIG_LED_POLARITY;
5280                         val &= ~XMAC_CONFIG_FORCE_LED_ON;
5281                 } else {
5282                         val |= XMAC_CONFIG_FORCE_LED_ON;
5283                         val &= ~XMAC_CONFIG_LED_POLARITY;
5284                 }
5285         }
5286 
5287         nw64_mac(XMAC_CONFIG, val);
5288 }
5289 
5290 static void niu_init_xif_xmac(struct niu *np)
5291 {
5292         struct niu_link_config *lp = &np->link_config;
5293         u64 val;
5294 
5295         if (np->flags & NIU_FLAGS_XCVR_SERDES) {
5296                 val = nr64(MIF_CONFIG);
5297                 val |= MIF_CONFIG_ATCA_GE;
5298                 nw64(MIF_CONFIG, val);
5299         }
5300 
5301         val = nr64_mac(XMAC_CONFIG);
5302         val &= ~XMAC_CONFIG_SEL_POR_CLK_SRC;
5303 
5304         val |= XMAC_CONFIG_TX_OUTPUT_EN;
5305 
5306         if (lp->loopback_mode == LOOPBACK_MAC) {
5307                 val &= ~XMAC_CONFIG_SEL_POR_CLK_SRC;
5308                 val |= XMAC_CONFIG_LOOPBACK;
5309         } else {
5310                 val &= ~XMAC_CONFIG_LOOPBACK;
5311         }
5312 
5313         if (np->flags & NIU_FLAGS_10G) {
5314                 val &= ~XMAC_CONFIG_LFS_DISABLE;
5315         } else {
5316                 val |= XMAC_CONFIG_LFS_DISABLE;
5317                 if (!(np->flags & NIU_FLAGS_FIBER) &&
5318                     !(np->flags & NIU_FLAGS_XCVR_SERDES))
5319                         val |= XMAC_CONFIG_1G_PCS_BYPASS;
5320                 else
5321                         val &= ~XMAC_CONFIG_1G_PCS_BYPASS;
5322         }
5323 
5324         val &= ~XMAC_CONFIG_10G_XPCS_BYPASS;
5325 
5326         if (lp->active_speed == SPEED_100)
5327                 val |= XMAC_CONFIG_SEL_CLK_25MHZ;
5328         else
5329                 val &= ~XMAC_CONFIG_SEL_CLK_25MHZ;
5330 
5331         nw64_mac(XMAC_CONFIG, val);
5332 
5333         val = nr64_mac(XMAC_CONFIG);
5334         val &= ~XMAC_CONFIG_MODE_MASK;
5335         if (np->flags & NIU_FLAGS_10G) {
5336                 val |= XMAC_CONFIG_MODE_XGMII;
5337         } else {
5338                 if (lp->active_speed == SPEED_1000)
5339                         val |= XMAC_CONFIG_MODE_GMII;
5340                 else
5341                         val |= XMAC_CONFIG_MODE_MII;
5342         }
5343 
5344         nw64_mac(XMAC_CONFIG, val);
5345 }
5346 
5347 static void niu_init_xif_bmac(struct niu *np)
5348 {
5349         struct niu_link_config *lp = &np->link_config;
5350         u64 val;
5351 
5352         val = BMAC_XIF_CONFIG_TX_OUTPUT_EN;
5353 
5354         if (lp->loopback_mode == LOOPBACK_MAC)
5355                 val |= BMAC_XIF_CONFIG_MII_LOOPBACK;
5356         else
5357                 val &= ~BMAC_XIF_CONFIG_MII_LOOPBACK;
5358 
5359         if (lp->active_speed == SPEED_1000)
5360                 val |= BMAC_XIF_CONFIG_GMII_MODE;
5361         else
5362                 val &= ~BMAC_XIF_CONFIG_GMII_MODE;
5363 
5364         val &= ~(BMAC_XIF_CONFIG_LINK_LED |
5365                  BMAC_XIF_CONFIG_LED_POLARITY);
5366 
5367         if (!(np->flags & NIU_FLAGS_10G) &&
5368             !(np->flags & NIU_FLAGS_FIBER) &&
5369             lp->active_speed == SPEED_100)
5370                 val |= BMAC_XIF_CONFIG_25MHZ_CLOCK;
5371         else
5372                 val &= ~BMAC_XIF_CONFIG_25MHZ_CLOCK;
5373 
5374         nw64_mac(BMAC_XIF_CONFIG, val);
5375 }
5376 
5377 static void niu_init_xif(struct niu *np)
5378 {
5379         if (np->flags & NIU_FLAGS_XMAC)
5380                 niu_init_xif_xmac(np);
5381         else
5382                 niu_init_xif_bmac(np);
5383 }
5384 
5385 static void niu_pcs_mii_reset(struct niu *np)
5386 {
5387         int limit = 1000;
5388         u64 val = nr64_pcs(PCS_MII_CTL);
5389         val |= PCS_MII_CTL_RST;
5390         nw64_pcs(PCS_MII_CTL, val);
5391         while ((--limit >= 0) && (val & PCS_MII_CTL_RST)) {
5392                 udelay(100);
5393                 val = nr64_pcs(PCS_MII_CTL);
5394         }
5395 }
5396 
5397 static void niu_xpcs_reset(struct niu *np)
5398 {
5399         int limit = 1000;
5400         u64 val = nr64_xpcs(XPCS_CONTROL1);
5401         val |= XPCS_CONTROL1_RESET;
5402         nw64_xpcs(XPCS_CONTROL1, val);
5403         while ((--limit >= 0) && (val & XPCS_CONTROL1_RESET)) {
5404                 udelay(100);
5405                 val = nr64_xpcs(XPCS_CONTROL1);
5406         }
5407 }
5408 
5409 static int niu_init_pcs(struct niu *np)
5410 {
5411         struct niu_link_config *lp = &np->link_config;
5412         u64 val;
5413 
5414         switch (np->flags & (NIU_FLAGS_10G |
5415                              NIU_FLAGS_FIBER |
5416                              NIU_FLAGS_XCVR_SERDES)) {
5417         case NIU_FLAGS_FIBER:
5418                 /* 1G fiber */
5419                 nw64_pcs(PCS_CONF, PCS_CONF_MASK | PCS_CONF_ENABLE);
5420                 nw64_pcs(PCS_DPATH_MODE, 0);
5421                 niu_pcs_mii_reset(np);
5422                 break;
5423 
5424         case NIU_FLAGS_10G:
5425         case NIU_FLAGS_10G | NIU_FLAGS_FIBER:
5426         case NIU_FLAGS_10G | NIU_FLAGS_XCVR_SERDES:
5427                 /* 10G SERDES */
5428                 if (!(np->flags & NIU_FLAGS_XMAC))
5429                         return -EINVAL;
5430 
5431                 /* 10G copper or fiber */
5432                 val = nr64_mac(XMAC_CONFIG);
5433                 val &= ~XMAC_CONFIG_10G_XPCS_BYPASS;
5434                 nw64_mac(XMAC_CONFIG, val);
5435 
5436                 niu_xpcs_reset(np);
5437 
5438                 val = nr64_xpcs(XPCS_CONTROL1);
5439                 if (lp->loopback_mode == LOOPBACK_PHY)
5440                         val |= XPCS_CONTROL1_LOOPBACK;
5441                 else
5442                         val &= ~XPCS_CONTROL1_LOOPBACK;
5443                 nw64_xpcs(XPCS_CONTROL1, val);
5444 
5445                 nw64_xpcs(XPCS_DESKEW_ERR_CNT, 0);
5446                 (void) nr64_xpcs(XPCS_SYMERR_CNT01);
5447                 (void) nr64_xpcs(XPCS_SYMERR_CNT23);
5448                 break;
5449 
5450 
5451         case NIU_FLAGS_XCVR_SERDES:
5452                 /* 1G SERDES */
5453                 niu_pcs_mii_reset(np);
5454                 nw64_pcs(PCS_CONF, PCS_CONF_MASK | PCS_CONF_ENABLE);
5455                 nw64_pcs(PCS_DPATH_MODE, 0);
5456                 break;
5457 
5458         case 0:
5459                 /* 1G copper */
5460         case NIU_FLAGS_XCVR_SERDES | NIU_FLAGS_FIBER:
5461                 /* 1G RGMII FIBER */
5462                 nw64_pcs(PCS_DPATH_MODE, PCS_DPATH_MODE_MII);
5463                 niu_pcs_mii_reset(np);
5464                 break;
5465 
5466         default:
5467                 return -EINVAL;
5468         }
5469 
5470         return 0;
5471 }
5472 
5473 static int niu_reset_tx_xmac(struct niu *np)
5474 {
5475         return niu_set_and_wait_clear_mac(np, XTXMAC_SW_RST,
5476                                           (XTXMAC_SW_RST_REG_RS |
5477                                            XTXMAC_SW_RST_SOFT_RST),
5478                                           1000, 100, "XTXMAC_SW_RST");
5479 }
5480 
5481 static int niu_reset_tx_bmac(struct niu *np)
5482 {
5483         int limit;
5484 
5485         nw64_mac(BTXMAC_SW_RST, BTXMAC_SW_RST_RESET);
5486         limit = 1000;
5487         while (--limit >= 0) {
5488                 if (!(nr64_mac(BTXMAC_SW_RST) & BTXMAC_SW_RST_RESET))
5489                         break;
5490                 udelay(100);
5491         }
5492         if (limit < 0) {
5493                 dev_err(np->device, "Port %u TX BMAC would not reset, BTXMAC_SW_RST[%llx]\n",
5494                         np->port,
5495                         (unsigned long long) nr64_mac(BTXMAC_SW_RST));
5496                 return -ENODEV;
5497         }
5498 
5499         return 0;
5500 }
5501 
5502 static int niu_reset_tx_mac(struct niu *np)
5503 {
5504         if (np->flags & NIU_FLAGS_XMAC)
5505                 return niu_reset_tx_xmac(np);
5506         else
5507                 return niu_reset_tx_bmac(np);
5508 }
5509 
5510 static void niu_init_tx_xmac(struct niu *np, u64 min, u64 max)
5511 {
5512         u64 val;
5513 
5514         val = nr64_mac(XMAC_MIN);
5515         val &= ~(XMAC_MIN_TX_MIN_PKT_SIZE |
5516                  XMAC_MIN_RX_MIN_PKT_SIZE);
5517         val |= (min << XMAC_MIN_RX_MIN_PKT_SIZE_SHFT);
5518         val |= (min << XMAC_MIN_TX_MIN_PKT_SIZE_SHFT);
5519         nw64_mac(XMAC_MIN, val);
5520 
5521         nw64_mac(XMAC_MAX, max);
5522 
5523         nw64_mac(XTXMAC_STAT_MSK, ~(u64)0);
5524 
5525         val = nr64_mac(XMAC_IPG);
5526         if (np->flags & NIU_FLAGS_10G) {
5527                 val &= ~XMAC_IPG_IPG_XGMII;
5528                 val |= (IPG_12_15_XGMII << XMAC_IPG_IPG_XGMII_SHIFT);
5529         } else {
5530                 val &= ~XMAC_IPG_IPG_MII_GMII;
5531                 val |= (IPG_12_MII_GMII << XMAC_IPG_IPG_MII_GMII_SHIFT);
5532         }
5533         nw64_mac(XMAC_IPG, val);
5534 
5535         val = nr64_mac(XMAC_CONFIG);
5536         val &= ~(XMAC_CONFIG_ALWAYS_NO_CRC |
5537                  XMAC_CONFIG_STRETCH_MODE |
5538                  XMAC_CONFIG_VAR_MIN_IPG_EN |
5539                  XMAC_CONFIG_TX_ENABLE);
5540         nw64_mac(XMAC_CONFIG, val);
5541 
5542         nw64_mac(TXMAC_FRM_CNT, 0);
5543         nw64_mac(TXMAC_BYTE_CNT, 0);
5544 }
5545 
5546 static void niu_init_tx_bmac(struct niu *np, u64 min, u64 max)
5547 {
5548         u64 val;
5549 
5550         nw64_mac(BMAC_MIN_FRAME, min);
5551         nw64_mac(BMAC_MAX_FRAME, max);
5552 
5553         nw64_mac(BTXMAC_STATUS_MASK, ~(u64)0);
5554         nw64_mac(BMAC_CTRL_TYPE, 0x8808);
5555         nw64_mac(BMAC_PREAMBLE_SIZE, 7);
5556 
5557         val = nr64_mac(BTXMAC_CONFIG);
5558         val &= ~(BTXMAC_CONFIG_FCS_DISABLE |
5559                  BTXMAC_CONFIG_ENABLE);
5560         nw64_mac(BTXMAC_CONFIG, val);
5561 }
5562 
5563 static void niu_init_tx_mac(struct niu *np)
5564 {
5565         u64 min, max;
5566 
5567         min = 64;
5568         if (np->dev->mtu > ETH_DATA_LEN)
5569                 max = 9216;
5570         else
5571                 max = 1522;
5572 
5573         /* The XMAC_MIN register only accepts values for TX min which
5574          * have the low 3 bits cleared.
5575          */
5576         BUG_ON(min & 0x7);
5577 
5578         if (np->flags & NIU_FLAGS_XMAC)
5579                 niu_init_tx_xmac(np, min, max);
5580         else
5581                 niu_init_tx_bmac(np, min, max);
5582 }
5583 
5584 static int niu_reset_rx_xmac(struct niu *np)
5585 {
5586         int limit;
5587 
5588         nw64_mac(XRXMAC_SW_RST,
5589                  XRXMAC_SW_RST_REG_RS | XRXMAC_SW_RST_SOFT_RST);
5590         limit = 1000;
5591         while (--limit >= 0) {
5592                 if (!(nr64_mac(XRXMAC_SW_RST) & (XRXMAC_SW_RST_REG_RS |
5593                                                  XRXMAC_SW_RST_SOFT_RST)))
5594                         break;
5595                 udelay(100);
5596         }
5597         if (limit < 0) {
5598                 dev_err(np->device, "Port %u RX XMAC would not reset, XRXMAC_SW_RST[%llx]\n",
5599                         np->port,
5600                         (unsigned long long) nr64_mac(XRXMAC_SW_RST));
5601                 return -ENODEV;
5602         }
5603 
5604         return 0;
5605 }
5606 
5607 static int niu_reset_rx_bmac(struct niu *np)
5608 {
5609         int limit;
5610 
5611         nw64_mac(BRXMAC_SW_RST, BRXMAC_SW_RST_RESET);
5612         limit = 1000;
5613         while (--limit >= 0) {
5614                 if (!(nr64_mac(BRXMAC_SW_RST) & BRXMAC_SW_RST_RESET))
5615                         break;
5616                 udelay(100);
5617         }
5618         if (limit < 0) {
5619                 dev_err(np->device, "Port %u RX BMAC would not reset, BRXMAC_SW_RST[%llx]\n",
5620                         np->port,
5621                         (unsigned long long) nr64_mac(BRXMAC_SW_RST));
5622                 return -ENODEV;
5623         }
5624 
5625         return 0;
5626 }
5627 
5628 static int niu_reset_rx_mac(struct niu *np)
5629 {
5630         if (np->flags & NIU_FLAGS_XMAC)
5631                 return niu_reset_rx_xmac(np);
5632         else
5633                 return niu_reset_rx_bmac(np);
5634 }
5635 
5636 static void niu_init_rx_xmac(struct niu *np)
5637 {
5638         struct niu_parent *parent = np->parent;
5639         struct niu_rdc_tables *tp = &parent->rdc_group_cfg[np->port];
5640         int first_rdc_table = tp->first_table_num;
5641         unsigned long i;
5642         u64 val;
5643 
5644         nw64_mac(XMAC_ADD_FILT0, 0);
5645         nw64_mac(XMAC_ADD_FILT1, 0);
5646         nw64_mac(XMAC_ADD_FILT2, 0);
5647         nw64_mac(XMAC_ADD_FILT12_MASK, 0);
5648         nw64_mac(XMAC_ADD_FILT00_MASK, 0);
5649         for (i = 0; i < MAC_NUM_HASH; i++)
5650                 nw64_mac(XMAC_HASH_TBL(i), 0);
5651         nw64_mac(XRXMAC_STAT_MSK, ~(u64)0);
5652         niu_set_primary_mac_rdc_table(np, first_rdc_table, 1);
5653         niu_set_multicast_mac_rdc_table(np, first_rdc_table, 1);
5654 
5655         val = nr64_mac(XMAC_CONFIG);
5656         val &= ~(XMAC_CONFIG_RX_MAC_ENABLE |
5657                  XMAC_CONFIG_PROMISCUOUS |
5658                  XMAC_CONFIG_PROMISC_GROUP |
5659                  XMAC_CONFIG_ERR_CHK_DIS |
5660                  XMAC_CONFIG_RX_CRC_CHK_DIS |
5661                  XMAC_CONFIG_RESERVED_MULTICAST |
5662                  XMAC_CONFIG_RX_CODEV_CHK_DIS |
5663                  XMAC_CONFIG_ADDR_FILTER_EN |
5664                  XMAC_CONFIG_RCV_PAUSE_ENABLE |
5665                  XMAC_CONFIG_STRIP_CRC |
5666                  XMAC_CONFIG_PASS_FLOW_CTRL |
5667                  XMAC_CONFIG_MAC2IPP_PKT_CNT_EN);
5668         val |= (XMAC_CONFIG_HASH_FILTER_EN);
5669         nw64_mac(XMAC_CONFIG, val);
5670 
5671         nw64_mac(RXMAC_BT_CNT, 0);
5672         nw64_mac(RXMAC_BC_FRM_CNT, 0);
5673         nw64_mac(RXMAC_MC_FRM_CNT, 0);
5674         nw64_mac(RXMAC_FRAG_CNT, 0);
5675         nw64_mac(RXMAC_HIST_CNT1, 0);
5676         nw64_mac(RXMAC_HIST_CNT2, 0);
5677         nw64_mac(RXMAC_HIST_CNT3, 0);
5678         nw64_mac(RXMAC_HIST_CNT4, 0);
5679         nw64_mac(RXMAC_HIST_CNT5, 0);
5680         nw64_mac(RXMAC_HIST_CNT6, 0);
5681         nw64_mac(RXMAC_HIST_CNT7, 0);
5682         nw64_mac(RXMAC_MPSZER_CNT, 0);
5683         nw64_mac(RXMAC_CRC_ER_CNT, 0);
5684         nw64_mac(RXMAC_CD_VIO_CNT, 0);
5685         nw64_mac(LINK_FAULT_CNT, 0);
5686 }
5687 
5688 static void niu_init_rx_bmac(struct niu *np)
5689 {
5690         struct niu_parent *parent = np->parent;
5691         struct niu_rdc_tables *tp = &parent->rdc_group_cfg[np->port];
5692         int first_rdc_table = tp->first_table_num;
5693         unsigned long i;
5694         u64 val;
5695 
5696         nw64_mac(BMAC_ADD_FILT0, 0);
5697         nw64_mac(BMAC_ADD_FILT1, 0);
5698         nw64_mac(BMAC_ADD_FILT2, 0);
5699         nw64_mac(BMAC_ADD_FILT12_MASK, 0);
5700         nw64_mac(BMAC_ADD_FILT00_MASK, 0);
5701         for (i = 0; i < MAC_NUM_HASH; i++)
5702                 nw64_mac(BMAC_HASH_TBL(i), 0);
5703         niu_set_primary_mac_rdc_table(np, first_rdc_table, 1);
5704         niu_set_multicast_mac_rdc_table(np, first_rdc_table, 1);
5705         nw64_mac(BRXMAC_STATUS_MASK, ~(u64)0);
5706 
5707         val = nr64_mac(BRXMAC_CONFIG);
5708         val &= ~(BRXMAC_CONFIG_ENABLE |
5709                  BRXMAC_CONFIG_STRIP_PAD |
5710                  BRXMAC_CONFIG_STRIP_FCS |
5711                  BRXMAC_CONFIG_PROMISC |
5712                  BRXMAC_CONFIG_PROMISC_GRP |
5713                  BRXMAC_CONFIG_ADDR_FILT_EN |
5714                  BRXMAC_CONFIG_DISCARD_DIS);
5715         val |= (BRXMAC_CONFIG_HASH_FILT_EN);
5716         nw64_mac(BRXMAC_CONFIG, val);
5717 
5718         val = nr64_mac(BMAC_ADDR_CMPEN);
5719         val |= BMAC_ADDR_CMPEN_EN0;
5720         nw64_mac(BMAC_ADDR_CMPEN, val);
5721 }
5722 
5723 static void niu_init_rx_mac(struct niu *np)
5724 {
5725         niu_set_primary_mac(np, np->dev->dev_addr);
5726 
5727         if (np->flags & NIU_FLAGS_XMAC)
5728                 niu_init_rx_xmac(np);
5729         else
5730                 niu_init_rx_bmac(np);
5731 }
5732 
5733 static void niu_enable_tx_xmac(struct niu *np, int on)
5734 {
5735         u64 val = nr64_mac(XMAC_CONFIG);
5736 
5737         if (on)
5738                 val |= XMAC_CONFIG_TX_ENABLE;
5739         else
5740                 val &= ~XMAC_CONFIG_TX_ENABLE;
5741         nw64_mac(XMAC_CONFIG, val);
5742 }
5743 
5744 static void niu_enable_tx_bmac(struct niu *np, int on)
5745 {
5746         u64 val = nr64_mac(BTXMAC_CONFIG);
5747 
5748         if (on)
5749                 val |= BTXMAC_CONFIG_ENABLE;
5750         else
5751                 val &= ~BTXMAC_CONFIG_ENABLE;
5752         nw64_mac(BTXMAC_CONFIG, val);
5753 }
5754 
5755 static void niu_enable_tx_mac(struct niu *np, int on)
5756 {
5757         if (np->flags & NIU_FLAGS_XMAC)
5758                 niu_enable_tx_xmac(np, on);
5759         else
5760                 niu_enable_tx_bmac(np, on);
5761 }
5762 
5763 static void niu_enable_rx_xmac(struct niu *np, int on)
5764 {
5765         u64 val = nr64_mac(XMAC_CONFIG);
5766 
5767         val &= ~(XMAC_CONFIG_HASH_FILTER_EN |
5768                  XMAC_CONFIG_PROMISCUOUS);
5769 
5770         if (np->flags & NIU_FLAGS_MCAST)
5771                 val |= XMAC_CONFIG_HASH_FILTER_EN;
5772         if (np->flags & NIU_FLAGS_PROMISC)
5773                 val |= XMAC_CONFIG_PROMISCUOUS;
5774 
5775         if (on)
5776                 val |= XMAC_CONFIG_RX_MAC_ENABLE;
5777         else
5778                 val &= ~XMAC_CONFIG_RX_MAC_ENABLE;
5779         nw64_mac(XMAC_CONFIG, val);
5780 }
5781 
5782 static void niu_enable_rx_bmac(struct niu *np, int on)
5783 {
5784         u64 val = nr64_mac(BRXMAC_CONFIG);
5785 
5786         val &= ~(BRXMAC_CONFIG_HASH_FILT_EN |
5787                  BRXMAC_CONFIG_PROMISC);
5788 
5789         if (np->flags & NIU_FLAGS_MCAST)
5790                 val |= BRXMAC_CONFIG_HASH_FILT_EN;
5791         if (np->flags & NIU_FLAGS_PROMISC)
5792                 val |= BRXMAC_CONFIG_PROMISC;
5793 
5794         if (on)
5795                 val |= BRXMAC_CONFIG_ENABLE;
5796         else
5797                 val &= ~BRXMAC_CONFIG_ENABLE;
5798         nw64_mac(BRXMAC_CONFIG, val);
5799 }
5800 
5801 static void niu_enable_rx_mac(struct niu *np, int on)
5802 {
5803         if (np->flags & NIU_FLAGS_XMAC)
5804                 niu_enable_rx_xmac(np, on);
5805         else
5806                 niu_enable_rx_bmac(np, on);
5807 }
5808 
5809 static int niu_init_mac(struct niu *np)
5810 {
5811         int err;
5812 
5813         niu_init_xif(np);
5814         err = niu_init_pcs(np);
5815         if (err)
5816                 return err;
5817 
5818         err = niu_reset_tx_mac(np);
5819         if (err)
5820                 return err;
5821         niu_init_tx_mac(np);
5822         err = niu_reset_rx_mac(np);
5823         if (err)
5824                 return err;
5825         niu_init_rx_mac(np);
5826 
5827         /* This looks hookey but the RX MAC reset we just did will
5828          * undo some of the state we setup in niu_init_tx_mac() so we
5829          * have to call it again.  In particular, the RX MAC reset will
5830          * set the XMAC_MAX register back to it's default value.
5831          */
5832         niu_init_tx_mac(np);
5833         niu_enable_tx_mac(np, 1);
5834 
5835         niu_enable_rx_mac(np, 1);
5836 
5837         return 0;
5838 }
5839 
5840 static void niu_stop_one_tx_channel(struct niu *np, struct tx_ring_info *rp)
5841 {
5842         (void) niu_tx_channel_stop(np, rp->tx_channel);
5843 }
5844 
5845 static void niu_stop_tx_channels(struct niu *np)
5846 {
5847         int i;
5848 
5849         for (i = 0; i < np->num_tx_rings; i++) {
5850                 struct tx_ring_info *rp = &np->tx_rings[i];
5851 
5852                 niu_stop_one_tx_channel(np, rp);
5853         }
5854 }
5855 
5856 static void niu_reset_one_tx_channel(struct niu *np, struct tx_ring_info *rp)
5857 {
5858         (void) niu_tx_channel_reset(np, rp->tx_channel);
5859 }
5860 
5861 static void niu_reset_tx_channels(struct niu *np)
5862 {
5863         int i;
5864 
5865         for (i = 0; i < np->num_tx_rings; i++) {
5866                 struct tx_ring_info *rp = &np->tx_rings[i];
5867 
5868                 niu_reset_one_tx_channel(np, rp);
5869         }
5870 }
5871 
5872 static void niu_stop_one_rx_channel(struct niu *np, struct rx_ring_info *rp)
5873 {
5874         (void) niu_enable_rx_channel(np, rp->rx_channel, 0);
5875 }
5876 
5877 static void niu_stop_rx_channels(struct niu *np)
5878 {
5879         int i;
5880 
5881         for (i = 0; i < np->num_rx_rings; i++) {
5882                 struct rx_ring_info *rp = &np->rx_rings[i];
5883 
5884                 niu_stop_one_rx_channel(np, rp);
5885         }
5886 }
5887 
5888 static void niu_reset_one_rx_channel(struct niu *np, struct rx_ring_info *rp)
5889 {
5890         int channel = rp->rx_channel;
5891 
5892         (void) niu_rx_channel_reset(np, channel);
5893         nw64(RX_DMA_ENT_MSK(channel), RX_DMA_ENT_MSK_ALL);
5894         nw64(RX_DMA_CTL_STAT(channel), 0);
5895         (void) niu_enable_rx_channel(np, channel, 0);
5896 }
5897 
5898 static void niu_reset_rx_channels(struct niu *np)
5899 {
5900         int i;
5901 
5902         for (i = 0; i < np->num_rx_rings; i++) {
5903                 struct rx_ring_info *rp = &np->rx_rings[i];
5904 
5905                 niu_reset_one_rx_channel(np, rp);
5906         }
5907 }
5908 
5909 static void niu_disable_ipp(struct niu *np)
5910 {
5911         u64 rd, wr, val;
5912         int limit;
5913 
5914         rd = nr64_ipp(IPP_DFIFO_RD_PTR);
5915         wr = nr64_ipp(IPP_DFIFO_WR_PTR);
5916         limit = 100;
5917         while (--limit >= 0 && (rd != wr)) {
5918                 rd = nr64_ipp(IPP_DFIFO_RD_PTR);
5919                 wr = nr64_ipp(IPP_DFIFO_WR_PTR);
5920         }
5921         if (limit < 0 &&
5922             (rd != 0 && wr != 1)) {
5923                 netdev_err(np->dev, "IPP would not quiesce, rd_ptr[%llx] wr_ptr[%llx]\n",
5924                            (unsigned long long)nr64_ipp(IPP_DFIFO_RD_PTR),
5925                            (unsigned long long)nr64_ipp(IPP_DFIFO_WR_PTR));
5926         }
5927 
5928         val = nr64_ipp(IPP_CFIG);
5929         val &= ~(IPP_CFIG_IPP_ENABLE |
5930                  IPP_CFIG_DFIFO_ECC_EN |
5931                  IPP_CFIG_DROP_BAD_CRC |
5932                  IPP_CFIG_CKSUM_EN);
5933         nw64_ipp(IPP_CFIG, val);
5934 
5935         (void) niu_ipp_reset(np);
5936 }
5937 
5938 static int niu_init_hw(struct niu *np)
5939 {
5940         int i, err;
5941 
5942         netif_printk(np, ifup, KERN_DEBUG, np->dev, "Initialize TXC\n");
5943         niu_txc_enable_port(np, 1);
5944         niu_txc_port_dma_enable(np, 1);
5945         niu_txc_set_imask(np, 0);
5946 
5947         netif_printk(np, ifup, KERN_DEBUG, np->dev, "Initialize TX channels\n");
5948         for (i = 0; i < np->num_tx_rings; i++) {
5949                 struct tx_ring_info *rp = &np->tx_rings[i];
5950 
5951                 err = niu_init_one_tx_channel(np, rp);
5952                 if (err)
5953                         return err;
5954         }
5955 
5956         netif_printk(np, ifup, KERN_DEBUG, np->dev, "Initialize RX channels\n");
5957         err = niu_init_rx_channels(np);
5958         if (err)
5959                 goto out_uninit_tx_channels;
5960 
5961         netif_printk(np, ifup, KERN_DEBUG, np->dev, "Initialize classifier\n");
5962         err = niu_init_classifier_hw(np);
5963         if (err)
5964                 goto out_uninit_rx_channels;
5965 
5966         netif_printk(np, ifup, KERN_DEBUG, np->dev, "Initialize ZCP\n");
5967         err = niu_init_zcp(np);
5968         if (err)
5969                 goto out_uninit_rx_channels;
5970 
5971         netif_printk(np, ifup, KERN_DEBUG, np->dev, "Initialize IPP\n");
5972         err = niu_init_ipp(np);
5973         if (err)
5974                 goto out_uninit_rx_channels;
5975 
5976         netif_printk(np, ifup, KERN_DEBUG, np->dev, "Initialize MAC\n");
5977         err = niu_init_mac(np);
5978         if (err)
5979                 goto out_uninit_ipp;
5980 
5981         return 0;
5982 
5983 out_uninit_ipp:
5984         netif_printk(np, ifup, KERN_DEBUG, np->dev, "Uninit IPP\n");
5985         niu_disable_ipp(np);
5986 
5987 out_uninit_rx_channels:
5988         netif_printk(np, ifup, KERN_DEBUG, np->dev, "Uninit RX channels\n");
5989         niu_stop_rx_channels(np);
5990         niu_reset_rx_channels(np);
5991 
5992 out_uninit_tx_channels:
5993         netif_printk(np, ifup, KERN_DEBUG, np->dev, "Uninit TX channels\n");
5994         niu_stop_tx_channels(np);
5995         niu_reset_tx_channels(np);
5996 
5997         return err;
5998 }
5999 
6000 static void niu_stop_hw(struct niu *np)
6001 {
6002         netif_printk(np, ifdown, KERN_DEBUG, np->dev, "Disable interrupts\n");
6003         niu_enable_interrupts(np, 0);
6004 
6005         netif_printk(np, ifdown, KERN_DEBUG, np->dev, "Disable RX MAC\n");
6006         niu_enable_rx_mac(np, 0);
6007 
6008         netif_printk(np, ifdown, KERN_DEBUG, np->dev, "Disable IPP\n");
6009         niu_disable_ipp(np);
6010 
6011         netif_printk(np, ifdown, KERN_DEBUG, np->dev, "Stop TX channels\n");
6012         niu_stop_tx_channels(np);
6013 
6014         netif_printk(np, ifdown, KERN_DEBUG, np->dev, "Stop RX channels\n");
6015         niu_stop_rx_channels(np);
6016 
6017         netif_printk(np, ifdown, KERN_DEBUG, np->dev, "Reset TX channels\n");
6018         niu_reset_tx_channels(np);
6019 
6020         netif_printk(np, ifdown, KERN_DEBUG, np->dev, "Reset RX channels\n");
6021         niu_reset_rx_channels(np);
6022 }
6023 
6024 static void niu_set_irq_name(struct niu *np)
6025 {
6026         int port = np->port;
6027         int i, j = 1;
6028 
6029         sprintf(np->irq_name[0], "%s:MAC", np->dev->name);
6030 
6031         if (port == 0) {
6032                 sprintf(np->irq_name[1], "%s:MIF", np->dev->name);
6033                 sprintf(np->irq_name[2], "%s:SYSERR", np->dev->name);
6034                 j = 3;
6035         }
6036 
6037         for (i = 0; i < np->num_ldg - j; i++) {
6038                 if (i < np->num_rx_rings)
6039                         sprintf(np->irq_name[i+j], "%s-rx-%d",
6040                                 np->dev->name, i);
6041                 else if (i < np->num_tx_rings + np->num_rx_rings)
6042                         sprintf(np->irq_name[i+j], "%s-tx-%d", np->dev->name,
6043                                 i - np->num_rx_rings);
6044         }
6045 }
6046 
6047 static int niu_request_irq(struct niu *np)
6048 {
6049         int i, j, err;
6050 
6051         niu_set_irq_name(np);
6052 
6053         err = 0;
6054         for (i = 0; i < np->num_ldg; i++) {
6055                 struct niu_ldg *lp = &np->ldg[i];
6056 
6057                 err = request_irq(lp->irq, niu_interrupt, IRQF_SHARED,
6058                                   np->irq_name[i], lp);
6059                 if (err)
6060                         goto out_free_irqs;
6061 
6062         }
6063 
6064         return 0;
6065 
6066 out_free_irqs:
6067         for (j = 0; j < i; j++) {
6068                 struct niu_ldg *lp = &np->ldg[j];
6069 
6070                 free_irq(lp->irq, lp);
6071         }
6072         return err;
6073 }
6074 
6075 static void niu_free_irq(struct niu *np)
6076 {
6077         int i;
6078 
6079         for (i = 0; i < np->num_ldg; i++) {
6080                 struct niu_ldg *lp = &np->ldg[i];
6081 
6082                 free_irq(lp->irq, lp);
6083         }
6084 }
6085 
6086 static void niu_enable_napi(struct niu *np)
6087 {
6088         int i;
6089 
6090         for (i = 0; i < np->num_ldg; i++)
6091                 napi_enable(&np->ldg[i].napi);
6092 }
6093 
6094 static void niu_disable_napi(struct niu *np)
6095 {
6096         int i;
6097 
6098         for (i = 0; i < np->num_ldg; i++)
6099                 napi_disable(&np->ldg[i].napi);
6100 }
6101 
6102 static int niu_open(struct net_device *dev)
6103 {
6104         struct niu *np = netdev_priv(dev);
6105         int err;
6106 
6107         netif_carrier_off(dev);
6108 
6109         err = niu_alloc_channels(np);
6110         if (err)
6111                 goto out_err;
6112 
6113         err = niu_enable_interrupts(np, 0);
6114         if (err)
6115                 goto out_free_channels;
6116 
6117         err = niu_request_irq(np);
6118         if (err)
6119                 goto out_free_channels;
6120 
6121         niu_enable_napi(np);
6122 
6123         spin_lock_irq(&np->lock);
6124 
6125         err = niu_init_hw(np);
6126         if (!err) {
6127                 init_timer(&np->timer);
6128                 np->timer.expires = jiffies + HZ;
6129                 np->timer.data = (unsigned long) np;
6130                 np->timer.function = niu_timer;
6131 
6132                 err = niu_enable_interrupts(np, 1);
6133                 if (err)
6134                         niu_stop_hw(np);
6135         }
6136 
6137         spin_unlock_irq(&np->lock);
6138 
6139         if (err) {
6140                 niu_disable_napi(np);
6141                 goto out_free_irq;
6142         }
6143 
6144         netif_tx_start_all_queues(dev);
6145 
6146         if (np->link_config.loopback_mode != LOOPBACK_DISABLED)
6147                 netif_carrier_on(dev);
6148 
6149         add_timer(&np->timer);
6150 
6151         return 0;
6152 
6153 out_free_irq:
6154         niu_free_irq(np);
6155 
6156 out_free_channels:
6157         niu_free_channels(np);
6158 
6159 out_err:
6160         return err;
6161 }
6162 
6163 static void niu_full_shutdown(struct niu *np, struct net_device *dev)
6164 {
6165         cancel_work_sync(&np->reset_task);
6166 
6167         niu_disable_napi(np);
6168         netif_tx_stop_all_queues(dev);
6169 
6170         del_timer_sync(&np->timer);
6171 
6172         spin_lock_irq(&np->lock);
6173 
6174         niu_stop_hw(np);
6175 
6176         spin_unlock_irq(&np->lock);
6177 }
6178 
6179 static int niu_close(struct net_device *dev)
6180 {
6181         struct niu *np = netdev_priv(dev);
6182 
6183         niu_full_shutdown(np, dev);
6184 
6185         niu_free_irq(np);
6186 
6187         niu_free_channels(np);
6188 
6189         niu_handle_led(np, 0);
6190 
6191         return 0;
6192 }
6193 
6194 static void niu_sync_xmac_stats(struct niu *np)
6195 {
6196         struct niu_xmac_stats *mp = &np->mac_stats.xmac;
6197 
6198         mp->tx_frames += nr64_mac(TXMAC_FRM_CNT);
6199         mp->tx_bytes += nr64_mac(TXMAC_BYTE_CNT);
6200 
6201         mp->rx_link_faults += nr64_mac(LINK_FAULT_CNT);
6202         mp->rx_align_errors += nr64_mac(RXMAC_ALIGN_ERR_CNT);
6203         mp->rx_frags += nr64_mac(RXMAC_FRAG_CNT);
6204         mp->rx_mcasts += nr64_mac(RXMAC_MC_FRM_CNT);
6205         mp->rx_bcasts += nr64_mac(RXMAC_BC_FRM_CNT);
6206         mp->rx_hist_cnt1 += nr64_mac(RXMAC_HIST_CNT1);
6207         mp->rx_hist_cnt2 += nr64_mac(RXMAC_HIST_CNT2);
6208         mp->rx_hist_cnt3 += nr64_mac(RXMAC_HIST_CNT3);
6209         mp->rx_hist_cnt4 += nr64_mac(RXMAC_HIST_CNT4);
6210         mp->rx_hist_cnt5 += nr64_mac(RXMAC_HIST_CNT5);
6211         mp->rx_hist_cnt6 += nr64_mac(RXMAC_HIST_CNT6);
6212         mp->rx_hist_cnt7 += nr64_mac(RXMAC_HIST_CNT7);
6213         mp->rx_octets += nr64_mac(RXMAC_BT_CNT);
6214         mp->rx_code_violations += nr64_mac(RXMAC_CD_VIO_CNT);
6215         mp->rx_len_errors += nr64_mac(RXMAC_MPSZER_CNT);
6216         mp->rx_crc_errors += nr64_mac(RXMAC_CRC_ER_CNT);
6217 }
6218 
6219 static void niu_sync_bmac_stats(struct niu *np)
6220 {
6221         struct niu_bmac_stats *mp = &np->mac_stats.bmac;
6222 
6223         mp->tx_bytes += nr64_mac(BTXMAC_BYTE_CNT);
6224         mp->tx_frames += nr64_mac(BTXMAC_FRM_CNT);
6225 
6226         mp->rx_frames += nr64_mac(BRXMAC_FRAME_CNT);
6227         mp->rx_align_errors += nr64_mac(BRXMAC_ALIGN_ERR_CNT);
6228         mp->rx_crc_errors += nr64_mac(BRXMAC_ALIGN_ERR_CNT);
6229         mp->rx_len_errors += nr64_mac(BRXMAC_CODE_VIOL_ERR_CNT);
6230 }
6231 
6232 static void niu_sync_mac_stats(struct niu *np)
6233 {
6234         if (np->flags & NIU_FLAGS_XMAC)
6235                 niu_sync_xmac_stats(np);
6236         else
6237                 niu_sync_bmac_stats(np);
6238 }
6239 
6240 static void niu_get_rx_stats(struct niu *np,
6241                              struct rtnl_link_stats64 *stats)
6242 {
6243         u64 pkts, dropped, errors, bytes;
6244         struct rx_ring_info *rx_rings;
6245         int i;
6246 
6247         pkts = dropped = errors = bytes = 0;
6248 
6249         rx_rings = ACCESS_ONCE(np->rx_rings);
6250         if (!rx_rings)
6251                 goto no_rings;
6252 
6253         for (i = 0; i < np->num_rx_rings; i++) {
6254                 struct rx_ring_info *rp = &rx_rings[i];
6255 
6256                 niu_sync_rx_discard_stats(np, rp, 0);
6257 
6258                 pkts += rp->rx_packets;
6259                 bytes += rp->rx_bytes;
6260                 dropped += rp->rx_dropped;
6261                 errors += rp->rx_errors;
6262         }
6263 
6264 no_rings:
6265         stats->rx_packets = pkts;
6266         stats->rx_bytes = bytes;
6267         stats->rx_dropped = dropped;
6268         stats->rx_errors = errors;
6269 }
6270 
6271 static void niu_get_tx_stats(struct niu *np,
6272                              struct rtnl_link_stats64 *stats)
6273 {
6274         u64 pkts, errors, bytes;
6275         struct tx_ring_info *tx_rings;
6276         int i;
6277 
6278         pkts = errors = bytes = 0;
6279 
6280         tx_rings = ACCESS_ONCE(np->tx_rings);
6281         if (!tx_rings)
6282                 goto no_rings;
6283 
6284         for (i = 0; i < np->num_tx_rings; i++) {
6285                 struct tx_ring_info *rp = &tx_rings[i];
6286 
6287                 pkts += rp->tx_packets;
6288                 bytes += rp->tx_bytes;
6289                 errors += rp->tx_errors;
6290         }
6291 
6292 no_rings:
6293         stats->tx_packets = pkts;
6294         stats->tx_bytes = bytes;
6295         stats->tx_errors = errors;
6296 }
6297 
6298 static struct rtnl_link_stats64 *niu_get_stats(struct net_device *dev,
6299                                                struct rtnl_link_stats64 *stats)
6300 {
6301         struct niu *np = netdev_priv(dev);
6302 
6303         if (netif_running(dev)) {
6304                 niu_get_rx_stats(np, stats);
6305                 niu_get_tx_stats(np, stats);
6306         }
6307 
6308         return stats;
6309 }
6310 
6311 static void niu_load_hash_xmac(struct niu *np, u16 *hash)
6312 {
6313         int i;
6314 
6315         for (i = 0; i < 16; i++)
6316                 nw64_mac(XMAC_HASH_TBL(i), hash[i]);
6317 }
6318 
6319 static void niu_load_hash_bmac(struct niu *np, u16 *hash)
6320 {
6321         int i;
6322 
6323         for (i = 0; i < 16; i++)
6324                 nw64_mac(BMAC_HASH_TBL(i), hash[i]);
6325 }
6326 
6327 static void niu_load_hash(struct niu *np, u16 *hash)
6328 {
6329         if (np->flags & NIU_FLAGS_XMAC)
6330                 niu_load_hash_xmac(np, hash);
6331         else
6332                 niu_load_hash_bmac(np, hash);
6333 }
6334 
6335 static void niu_set_rx_mode(struct net_device *dev)
6336 {
6337         struct niu *np = netdev_priv(dev);
6338         int i, alt_cnt, err;
6339         struct netdev_hw_addr *ha;
6340         unsigned long flags;
6341         u16 hash[16] = { 0, };
6342 
6343         spin_lock_irqsave(&np->lock, flags);
6344         niu_enable_rx_mac(np, 0);
6345 
6346         np->flags &= ~(NIU_FLAGS_MCAST | NIU_FLAGS_PROMISC);
6347         if (dev->flags & IFF_PROMISC)
6348                 np->flags |= NIU_FLAGS_PROMISC;
6349         if ((dev->flags & IFF_ALLMULTI) || (!netdev_mc_empty(dev)))
6350                 np->flags |= NIU_FLAGS_MCAST;
6351 
6352         alt_cnt = netdev_uc_count(dev);
6353         if (alt_cnt > niu_num_alt_addr(np)) {
6354                 alt_cnt = 0;
6355                 np->flags |= NIU_FLAGS_PROMISC;
6356         }
6357 
6358         if (alt_cnt) {
6359                 int index = 0;
6360 
6361                 netdev_for_each_uc_addr(ha, dev) {
6362                         err = niu_set_alt_mac(np, index, ha->addr);
6363                         if (err)
6364                                 netdev_warn(dev, "Error %d adding alt mac %d\n",
6365                                             err, index);
6366                         err = niu_enable_alt_mac(np, index, 1);
6367                         if (err)
6368                                 netdev_warn(dev, "Error %d enabling alt mac %d\n",
6369                                             err, index);
6370 
6371                         index++;
6372                 }
6373         } else {
6374                 int alt_start;
6375                 if (np->flags & NIU_FLAGS_XMAC)
6376                         alt_start = 0;
6377                 else
6378                         alt_start = 1;
6379                 for (i = alt_start; i < niu_num_alt_addr(np); i++) {
6380                         err = niu_enable_alt_mac(np, i, 0);
6381                         if (err)
6382                                 netdev_warn(dev, "Error %d disabling alt mac %d\n",
6383                                             err, i);
6384                 }
6385         }
6386         if (dev->flags & IFF_ALLMULTI) {
6387                 for (i = 0; i < 16; i++)
6388                         hash[i] = 0xffff;
6389         } else if (!netdev_mc_empty(dev)) {
6390                 netdev_for_each_mc_addr(ha, dev) {
6391                         u32 crc = ether_crc_le(ETH_ALEN, ha->addr);
6392 
6393                         crc >>= 24;
6394                         hash[crc >> 4] |= (1 << (15 - (crc & 0xf)));
6395                 }
6396         }
6397 
6398         if (np->flags & NIU_FLAGS_MCAST)
6399                 niu_load_hash(np, hash);
6400 
6401         niu_enable_rx_mac(np, 1);
6402         spin_unlock_irqrestore(&np->lock, flags);
6403 }
6404 
6405 static int niu_set_mac_addr(struct net_device *dev, void *p)
6406 {
6407         struct niu *np = netdev_priv(dev);
6408         struct sockaddr *addr = p;
6409         unsigned long flags;
6410 
6411         if (!is_valid_ether_addr(addr->sa_data))
6412                 return -EADDRNOTAVAIL;
6413 
6414         memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
6415 
6416         if (!netif_running(dev))
6417                 return 0;
6418 
6419         spin_lock_irqsave(&np->lock, flags);
6420         niu_enable_rx_mac(np, 0);
6421         niu_set_primary_mac(np, dev->dev_addr);
6422         niu_enable_rx_mac(np, 1);
6423         spin_unlock_irqrestore(&np->lock, flags);
6424 
6425         return 0;
6426 }
6427 
6428 static int niu_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
6429 {
6430         return -EOPNOTSUPP;
6431 }
6432 
6433 static void niu_netif_stop(struct niu *np)
6434 {
6435         np->dev->trans_start = jiffies; /* prevent tx timeout */
6436 
6437         niu_disable_napi(np);
6438 
6439         netif_tx_disable(np->dev);
6440 }
6441 
6442 static void niu_netif_start(struct niu *np)
6443 {
6444         /* NOTE: unconditional netif_wake_queue is only appropriate
6445          * so long as all callers are assured to have free tx slots
6446          * (such as after niu_init_hw).
6447          */
6448         netif_tx_wake_all_queues(np->dev);
6449 
6450         niu_enable_napi(np);
6451 
6452         niu_enable_interrupts(np, 1);
6453 }
6454 
6455 static void niu_reset_buffers(struct niu *np)
6456 {
6457         int i, j, k, err;
6458 
6459         if (np->rx_rings) {
6460                 for (i = 0; i < np->num_rx_rings; i++) {
6461                         struct rx_ring_info *rp = &np->rx_rings[i];
6462 
6463                         for (j = 0, k = 0; j < MAX_RBR_RING_SIZE; j++) {
6464                                 struct page *page;
6465 
6466                                 page = rp->rxhash[j];
6467                                 while (page) {
6468                                         struct page *next =
6469                                                 (struct page *) page->mapping;
6470                                         u64 base = page->index;
6471                                         base = base >> RBR_DESCR_ADDR_SHIFT;
6472                                         rp->rbr[k++] = cpu_to_le32(base);
6473                                         page = next;
6474                                 }
6475                         }
6476                         for (; k < MAX_RBR_RING_SIZE; k++) {
6477                                 err = niu_rbr_add_page(np, rp, GFP_ATOMIC, k);
6478                                 if (unlikely(err))
6479                                         break;
6480                         }
6481 
6482                         rp->rbr_index = rp->rbr_table_size - 1;
6483                         rp->rcr_index = 0;
6484                         rp->rbr_pending = 0;
6485                         rp->rbr_refill_pending = 0;
6486                 }
6487         }
6488         if (np->tx_rings) {
6489                 for (i = 0; i < np->num_tx_rings; i++) {
6490                         struct tx_ring_info *rp = &np->tx_rings[i];
6491 
6492                         for (j = 0; j < MAX_TX_RING_SIZE; j++) {
6493                                 if (rp->tx_buffs[j].skb)
6494                                         (void) release_tx_packet(np, rp, j);
6495                         }
6496 
6497                         rp->pending = MAX_TX_RING_SIZE;
6498                         rp->prod = 0;
6499                         rp->cons = 0;
6500                         rp->wrap_bit = 0;
6501                 }
6502         }
6503 }
6504 
6505 static void niu_reset_task(struct work_struct *work)
6506 {
6507         struct niu *np = container_of(work, struct niu, reset_task);
6508         unsigned long flags;
6509         int err;
6510 
6511         spin_lock_irqsave(&np->lock, flags);
6512         if (!netif_running(np->dev)) {
6513                 spin_unlock_irqrestore(&np->lock, flags);
6514                 return;
6515         }
6516 
6517         spin_unlock_irqrestore(&np->lock, flags);
6518 
6519         del_timer_sync(&np->timer);
6520 
6521         niu_netif_stop(np);
6522 
6523         spin_lock_irqsave(&np->lock, flags);
6524 
6525         niu_stop_hw(np);
6526 
6527         spin_unlock_irqrestore(&np->lock, flags);
6528 
6529         niu_reset_buffers(np);
6530 
6531         spin_lock_irqsave(&np->lock, flags);
6532 
6533         err = niu_init_hw(np);
6534         if (!err) {
6535                 np->timer.expires = jiffies + HZ;
6536                 add_timer(&np->timer);
6537                 niu_netif_start(np);
6538         }
6539 
6540         spin_unlock_irqrestore(&np->lock, flags);
6541 }
6542 
6543 static void niu_tx_timeout(struct net_device *dev)
6544 {
6545         struct niu *np = netdev_priv(dev);
6546 
6547         dev_err(np->device, "%s: Transmit timed out, resetting\n",
6548                 dev->name);
6549 
6550         schedule_work(&np->reset_task);
6551 }
6552 
6553 static void niu_set_txd(struct tx_ring_info *rp, int index,
6554                         u64 mapping, u64 len, u64 mark,
6555                         u64 n_frags)
6556 {
6557         __le64 *desc = &rp->descr[index];
6558 
6559         *desc = cpu_to_le64(mark |
6560                             (n_frags << TX_DESC_NUM_PTR_SHIFT) |
6561                             (len << TX_DESC_TR_LEN_SHIFT) |
6562                             (mapping & TX_DESC_SAD));
6563 }
6564 
6565 static u64 niu_compute_tx_flags(struct sk_buff *skb, struct ethhdr *ehdr,
6566                                 u64 pad_bytes, u64 len)
6567 {
6568         u16 eth_proto, eth_proto_inner;
6569         u64 csum_bits, l3off, ihl, ret;
6570         u8 ip_proto;
6571         int ipv6;
6572 
6573         eth_proto = be16_to_cpu(ehdr->h_proto);
6574         eth_proto_inner = eth_proto;
6575         if (eth_proto == ETH_P_8021Q) {
6576                 struct vlan_ethhdr *vp = (struct vlan_ethhdr *) ehdr;
6577                 __be16 val = vp->h_vlan_encapsulated_proto;
6578 
6579                 eth_proto_inner = be16_to_cpu(val);
6580         }
6581 
6582         ipv6 = ihl = 0;
6583         switch (skb->protocol) {
6584         case cpu_to_be16(ETH_P_IP):
6585                 ip_proto = ip_hdr(skb)->protocol;
6586                 ihl = ip_hdr(skb)->ihl;
6587                 break;
6588         case cpu_to_be16(ETH_P_IPV6):
6589                 ip_proto = ipv6_hdr(skb)->nexthdr;
6590                 ihl = (40 >> 2);
6591                 ipv6 = 1;
6592                 break;
6593         default:
6594                 ip_proto = ihl = 0;
6595                 break;
6596         }
6597 
6598         csum_bits = TXHDR_CSUM_NONE;
6599         if (skb->ip_summed == CHECKSUM_PARTIAL) {
6600                 u64 start, stuff;
6601 
6602                 csum_bits = (ip_proto == IPPROTO_TCP ?
6603                              TXHDR_CSUM_TCP :
6604                              (ip_proto == IPPROTO_UDP ?
6605                               TXHDR_CSUM_UDP : TXHDR_CSUM_SCTP));
6606 
6607                 start = skb_checksum_start_offset(skb) -
6608                         (pad_bytes + sizeof(struct tx_pkt_hdr));
6609                 stuff = start + skb->csum_offset;
6610 
6611                 csum_bits |= (start / 2) << TXHDR_L4START_SHIFT;
6612                 csum_bits |= (stuff / 2) << TXHDR_L4STUFF_SHIFT;
6613         }
6614 
6615         l3off = skb_network_offset(skb) -
6616                 (pad_bytes + sizeof(struct tx_pkt_hdr));
6617 
6618         ret = (((pad_bytes / 2) << TXHDR_PAD_SHIFT) |
6619                (len << TXHDR_LEN_SHIFT) |
6620                ((l3off / 2) << TXHDR_L3START_SHIFT) |
6621                (ihl << TXHDR_IHL_SHIFT) |
6622                ((eth_proto_inner < ETH_P_802_3_MIN) ? TXHDR_LLC : 0) |
6623                ((eth_proto == ETH_P_8021Q) ? TXHDR_VLAN : 0) |
6624                (ipv6 ? TXHDR_IP_VER : 0) |
6625                csum_bits);
6626 
6627         return ret;
6628 }
6629 
6630 static netdev_tx_t niu_start_xmit(struct sk_buff *skb,
6631                                   struct net_device *dev)
6632 {
6633         struct niu *np = netdev_priv(dev);
6634         unsigned long align, headroom;
6635         struct netdev_queue *txq;
6636         struct tx_ring_info *rp;
6637         struct tx_pkt_hdr *tp;
6638         unsigned int len, nfg;
6639         struct ethhdr *ehdr;
6640         int prod, i, tlen;
6641         u64 mapping, mrk;
6642 
6643         i = skb_get_queue_mapping(skb);
6644         rp = &np->tx_rings[i];
6645         txq = netdev_get_tx_queue(dev, i);
6646 
6647         if (niu_tx_avail(rp) <= (skb_shinfo(skb)->nr_frags + 1)) {
6648                 netif_tx_stop_queue(txq);
6649                 dev_err(np->device, "%s: BUG! Tx ring full when queue awake!\n", dev->name);
6650                 rp->tx_errors++;
6651                 return NETDEV_TX_BUSY;
6652         }
6653 
6654         if (skb->len < ETH_ZLEN) {
6655                 unsigned int pad_bytes = ETH_ZLEN - skb->len;
6656 
6657                 if (skb_pad(skb, pad_bytes))
6658                         goto out;
6659                 skb_put(skb, pad_bytes);
6660         }
6661 
6662         len = sizeof(struct tx_pkt_hdr) + 15;
6663         if (skb_headroom(skb) < len) {
6664                 struct sk_buff *skb_new;
6665 
6666                 skb_new = skb_realloc_headroom(skb, len);
6667                 if (!skb_new) {
6668                         rp->tx_errors++;
6669                         goto out_drop;
6670                 }
6671                 kfree_skb(skb);
6672                 skb = skb_new;
6673         } else
6674                 skb_orphan(skb);
6675 
6676         align = ((unsigned long) skb->data & (16 - 1));
6677         headroom = align + sizeof(struct tx_pkt_hdr);
6678 
6679         ehdr = (struct ethhdr *) skb->data;
6680         tp = (struct tx_pkt_hdr *) skb_push(skb, headroom);
6681 
6682         len = skb->len - sizeof(struct tx_pkt_hdr);
6683         tp->flags = cpu_to_le64(niu_compute_tx_flags(skb, ehdr, align, len));
6684         tp->resv = 0;
6685 
6686         len = skb_headlen(skb);
6687         mapping = np->ops->map_single(np->device, skb->data,
6688                                       len, DMA_TO_DEVICE);
6689 
6690         prod = rp->prod;
6691 
6692         rp->tx_buffs[prod].skb = skb;
6693         rp->tx_buffs[prod].mapping = mapping;
6694 
6695         mrk = TX_DESC_SOP;
6696         if (++rp->mark_counter == rp->mark_freq) {
6697                 rp->mark_counter = 0;
6698                 mrk |= TX_DESC_MARK;
6699                 rp->mark_pending++;
6700         }
6701 
6702         tlen = len;
6703         nfg = skb_shinfo(skb)->nr_frags;
6704         while (tlen > 0) {
6705                 tlen -= MAX_TX_DESC_LEN;
6706                 nfg++;
6707         }
6708 
6709         while (len > 0) {
6710                 unsigned int this_len = len;
6711 
6712                 if (this_len > MAX_TX_DESC_LEN)
6713                         this_len = MAX_TX_DESC_LEN;
6714 
6715                 niu_set_txd(rp, prod, mapping, this_len, mrk, nfg);
6716                 mrk = nfg = 0;
6717 
6718                 prod = NEXT_TX(rp, prod);
6719                 mapping += this_len;
6720                 len -= this_len;
6721         }
6722 
6723         for (i = 0; i <  skb_shinfo(skb)->nr_frags; i++) {
6724                 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
6725 
6726                 len = skb_frag_size(frag);
6727                 mapping = np->ops->map_page(np->device, skb_frag_page(frag),
6728                                             frag->page_offset, len,
6729                                             DMA_TO_DEVICE);
6730 
6731                 rp->tx_buffs[prod].skb = NULL;
6732                 rp->tx_buffs[prod].mapping = mapping;
6733 
6734                 niu_set_txd(rp, prod, mapping, len, 0, 0);
6735 
6736                 prod = NEXT_TX(rp, prod);
6737         }
6738 
6739         if (prod < rp->prod)
6740                 rp->wrap_bit ^= TX_RING_KICK_WRAP;
6741         rp->prod = prod;
6742 
6743         nw64(TX_RING_KICK(rp->tx_channel), rp->wrap_bit | (prod << 3));
6744 
6745         if (unlikely(niu_tx_avail(rp) <= (MAX_SKB_FRAGS + 1))) {
6746                 netif_tx_stop_queue(txq);
6747                 if (niu_tx_avail(rp) > NIU_TX_WAKEUP_THRESH(rp))
6748                         netif_tx_wake_queue(txq);
6749         }
6750 
6751 out:
6752         return NETDEV_TX_OK;
6753 
6754 out_drop:
6755         rp->tx_errors++;
6756         kfree_skb(skb);
6757         goto out;
6758 }
6759 
6760 static int niu_change_mtu(struct net_device *dev, int new_mtu)
6761 {
6762         struct niu *np = netdev_priv(dev);
6763         int err, orig_jumbo, new_jumbo;
6764 
6765         if (new_mtu < 68 || new_mtu > NIU_MAX_MTU)
6766                 return -EINVAL;
6767 
6768         orig_jumbo = (dev->mtu > ETH_DATA_LEN);
6769         new_jumbo = (new_mtu > ETH_DATA_LEN);
6770 
6771         dev->mtu = new_mtu;
6772 
6773         if (!netif_running(dev) ||
6774             (orig_jumbo == new_jumbo))
6775                 return 0;
6776 
6777         niu_full_shutdown(np, dev);
6778 
6779         niu_free_channels(np);
6780 
6781         niu_enable_napi(np);
6782 
6783         err = niu_alloc_channels(np);
6784         if (err)
6785                 return err;
6786 
6787         spin_lock_irq(&np->lock);
6788 
6789         err = niu_init_hw(np);
6790         if (!err) {
6791                 init_timer(&np->timer);
6792                 np->timer.expires = jiffies + HZ;
6793                 np->timer.data = (unsigned long) np;
6794                 np->timer.function = niu_timer;
6795 
6796                 err = niu_enable_interrupts(np, 1);
6797                 if (err)
6798                         niu_stop_hw(np);
6799         }
6800 
6801         spin_unlock_irq(&np->lock);
6802 
6803         if (!err) {
6804                 netif_tx_start_all_queues(dev);
6805                 if (np->link_config.loopback_mode != LOOPBACK_DISABLED)
6806                         netif_carrier_on(dev);
6807 
6808                 add_timer(&np->timer);
6809         }
6810 
6811         return err;
6812 }
6813 
6814 static void niu_get_drvinfo(struct net_device *dev,
6815                             struct ethtool_drvinfo *info)
6816 {
6817         struct niu *np = netdev_priv(dev);
6818         struct niu_vpd *vpd = &np->vpd;
6819 
6820         strlcpy(info->driver, DRV_MODULE_NAME, sizeof(info->driver));
6821         strlcpy(info->version, DRV_MODULE_VERSION, sizeof(info->version));
6822         snprintf(info->fw_version, sizeof(info->fw_version), "%d.%d",
6823                 vpd->fcode_major, vpd->fcode_minor);
6824         if (np->parent->plat_type != PLAT_TYPE_NIU)
6825                 strlcpy(info->bus_info, pci_name(np->pdev),
6826                         sizeof(info->bus_info));
6827 }
6828 
6829 static int niu_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
6830 {
6831         struct niu *np = netdev_priv(dev);
6832         struct niu_link_config *lp;
6833 
6834         lp = &np->link_config;
6835 
6836         memset(cmd, 0, sizeof(*cmd));
6837         cmd->phy_address = np->phy_addr;
6838         cmd->supported = lp->supported;
6839         cmd->advertising = lp->active_advertising;
6840         cmd->autoneg = lp->active_autoneg;
6841         ethtool_cmd_speed_set(cmd, lp->active_speed);
6842         cmd->duplex = lp->active_duplex;
6843         cmd->port = (np->flags & NIU_FLAGS_FIBER) ? PORT_FIBRE : PORT_TP;
6844         cmd->transceiver = (np->flags & NIU_FLAGS_XCVR_SERDES) ?
6845                 XCVR_EXTERNAL : XCVR_INTERNAL;
6846 
6847         return 0;
6848 }
6849 
6850 static int niu_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
6851 {
6852         struct niu *np = netdev_priv(dev);
6853         struct niu_link_config *lp = &np->link_config;
6854 
6855         lp->advertising = cmd->advertising;
6856         lp->speed = ethtool_cmd_speed(cmd);
6857         lp->duplex = cmd->duplex;
6858         lp->autoneg = cmd->autoneg;
6859         return niu_init_link(np);
6860 }
6861 
6862 static u32 niu_get_msglevel(struct net_device *dev)
6863 {
6864         struct niu *np = netdev_priv(dev);
6865         return np->msg_enable;
6866 }
6867 
6868 static void niu_set_msglevel(struct net_device *dev, u32 value)
6869 {
6870         struct niu *np = netdev_priv(dev);
6871         np->msg_enable = value;
6872 }
6873 
6874 static int niu_nway_reset(struct net_device *dev)
6875 {
6876         struct niu *np = netdev_priv(dev);
6877 
6878         if (np->link_config.autoneg)
6879                 return niu_init_link(np);
6880 
6881         return 0;
6882 }
6883 
6884 static int niu_get_eeprom_len(struct net_device *dev)
6885 {
6886         struct niu *np = netdev_priv(dev);
6887 
6888         return np->eeprom_len;
6889 }
6890 
6891 static int niu_get_eeprom(struct net_device *dev,
6892                           struct ethtool_eeprom *eeprom, u8 *data)
6893 {
6894         struct niu *np = netdev_priv(dev);
6895         u32 offset, len, val;
6896 
6897         offset = eeprom->offset;
6898         len = eeprom->len;
6899 
6900         if (offset + len < offset)
6901                 return -EINVAL;
6902         if (offset >= np->eeprom_len)
6903                 return -EINVAL;
6904         if (offset + len > np->eeprom_len)
6905                 len = eeprom->len = np->eeprom_len - offset;
6906 
6907         if (offset & 3) {
6908                 u32 b_offset, b_count;
6909 
6910                 b_offset = offset & 3;
6911                 b_count = 4 - b_offset;
6912                 if (b_count > len)
6913                         b_count = len;
6914 
6915                 val = nr64(ESPC_NCR((offset - b_offset) / 4));
6916                 memcpy(data, ((char *)&val) + b_offset, b_count);
6917                 data += b_count;
6918                 len -= b_count;
6919                 offset += b_count;
6920         }
6921         while (len >= 4) {
6922                 val = nr64(ESPC_NCR(offset / 4));
6923                 memcpy(data, &val, 4);
6924                 data += 4;
6925                 len -= 4;
6926                 offset += 4;
6927         }
6928         if (len) {
6929                 val = nr64(ESPC_NCR(offset / 4));
6930                 memcpy(data, &val, len);
6931         }
6932         return 0;
6933 }
6934 
6935 static void niu_ethflow_to_l3proto(int flow_type, u8 *pid)
6936 {
6937         switch (flow_type) {
6938         case TCP_V4_FLOW:
6939         case TCP_V6_FLOW:
6940                 *pid = IPPROTO_TCP;
6941                 break;
6942         case UDP_V4_FLOW:
6943         case UDP_V6_FLOW:
6944                 *pid = IPPROTO_UDP;
6945                 break;
6946         case SCTP_V4_FLOW:
6947         case SCTP_V6_FLOW:
6948                 *pid = IPPROTO_SCTP;
6949                 break;
6950         case AH_V4_FLOW:
6951         case AH_V6_FLOW:
6952                 *pid = IPPROTO_AH;
6953                 break;
6954         case ESP_V4_FLOW:
6955         case ESP_V6_FLOW:
6956                 *pid = IPPROTO_ESP;
6957                 break;
6958         default:
6959                 *pid = 0;
6960                 break;
6961         }
6962 }
6963 
6964 static int niu_class_to_ethflow(u64 class, int *flow_type)
6965 {
6966         switch (class) {
6967         case CLASS_CODE_TCP_IPV4:
6968                 *flow_type = TCP_V4_FLOW;
6969                 break;
6970         case CLASS_CODE_UDP_IPV4:
6971                 *flow_type = UDP_V4_FLOW;
6972                 break;
6973         case CLASS_CODE_AH_ESP_IPV4:
6974                 *flow_type = AH_V4_FLOW;
6975                 break;
6976         case CLASS_CODE_SCTP_IPV4:
6977                 *flow_type = SCTP_V4_FLOW;
6978                 break;
6979         case CLASS_CODE_TCP_IPV6:
6980                 *flow_type = TCP_V6_FLOW;
6981                 break;
6982         case CLASS_CODE_UDP_IPV6:
6983                 *flow_type = UDP_V6_FLOW;
6984                 break;
6985         case CLASS_CODE_AH_ESP_IPV6:
6986                 *flow_type = AH_V6_FLOW;
6987                 break;
6988         case CLASS_CODE_SCTP_IPV6:
6989                 *flow_type = SCTP_V6_FLOW;
6990                 break;
6991         case CLASS_CODE_USER_PROG1:
6992         case CLASS_CODE_USER_PROG2:
6993         case CLASS_CODE_USER_PROG3:
6994         case CLASS_CODE_USER_PROG4:
6995                 *flow_type = IP_USER_FLOW;
6996                 break;
6997         default:
6998                 return 0;
6999         }
7000 
7001         return 1;
7002 }
7003 
7004 static int niu_ethflow_to_class(int flow_type, u64 *class)
7005 {
7006         switch (flow_type) {
7007         case TCP_V4_FLOW:
7008                 *class = CLASS_CODE_TCP_IPV4;
7009                 break;
7010         case UDP_V4_FLOW:
7011                 *class = CLASS_CODE_UDP_IPV4;
7012                 break;
7013         case AH_ESP_V4_FLOW:
7014         case AH_V4_FLOW:
7015         case ESP_V4_FLOW:
7016                 *class = CLASS_CODE_AH_ESP_IPV4;
7017                 break;
7018         case SCTP_V4_FLOW:
7019                 *class = CLASS_CODE_SCTP_IPV4;
7020                 break;
7021         case TCP_V6_FLOW:
7022                 *class = CLASS_CODE_TCP_IPV6;
7023                 break;
7024         case UDP_V6_FLOW:
7025                 *class = CLASS_CODE_UDP_IPV6;
7026                 break;
7027         case AH_ESP_V6_FLOW:
7028         case AH_V6_FLOW:
7029         case ESP_V6_FLOW:
7030                 *class = CLASS_CODE_AH_ESP_IPV6;
7031                 break;
7032         case SCTP_V6_FLOW:
7033                 *class = CLASS_CODE_SCTP_IPV6;
7034                 break;
7035         default:
7036                 return 0;
7037         }
7038 
7039         return 1;
7040 }
7041 
7042 static u64 niu_flowkey_to_ethflow(u64 flow_key)
7043 {
7044         u64 ethflow = 0;
7045 
7046         if (flow_key & FLOW_KEY_L2DA)
7047                 ethflow |= RXH_L2DA;
7048         if (flow_key & FLOW_KEY_VLAN)
7049                 ethflow |= RXH_VLAN;
7050         if (flow_key & FLOW_KEY_IPSA)
7051                 ethflow |= RXH_IP_SRC;
7052         if (flow_key & FLOW_KEY_IPDA)
7053                 ethflow |= RXH_IP_DST;
7054         if (flow_key & FLOW_KEY_PROTO)
7055                 ethflow |= RXH_L3_PROTO;
7056         if (flow_key & (FLOW_KEY_L4_BYTE12 << FLOW_KEY_L4_0_SHIFT))
7057                 ethflow |= RXH_L4_B_0_1;
7058         if (flow_key & (FLOW_KEY_L4_BYTE12 << FLOW_KEY_L4_1_SHIFT))
7059                 ethflow |= RXH_L4_B_2_3;
7060 
7061         return ethflow;
7062 
7063 }
7064 
7065 static int niu_ethflow_to_flowkey(u64 ethflow, u64 *flow_key)
7066 {
7067         u64 key = 0;
7068 
7069         if (ethflow & RXH_L2DA)
7070                 key |= FLOW_KEY_L2DA;
7071         if (ethflow & RXH_VLAN)
7072                 key |= FLOW_KEY_VLAN;
7073         if (ethflow & RXH_IP_SRC)
7074                 key |= FLOW_KEY_IPSA;
7075         if (ethflow & RXH_IP_DST)
7076                 key |= FLOW_KEY_IPDA;
7077         if (ethflow & RXH_L3_PROTO)
7078                 key |= FLOW_KEY_PROTO;
7079         if (ethflow & RXH_L4_B_0_1)
7080                 key |= (FLOW_KEY_L4_BYTE12 << FLOW_KEY_L4_0_SHIFT);
7081         if (ethflow & RXH_L4_B_2_3)
7082                 key |= (FLOW_KEY_L4_BYTE12 << FLOW_KEY_L4_1_SHIFT);
7083 
7084         *flow_key = key;
7085 
7086         return 1;
7087 
7088 }
7089 
7090 static int niu_get_hash_opts(struct niu *np, struct ethtool_rxnfc *nfc)
7091 {
7092         u64 class;
7093 
7094         nfc->data = 0;
7095 
7096         if (!niu_ethflow_to_class(nfc->flow_type, &class))
7097                 return -EINVAL;
7098 
7099         if (np->parent->tcam_key[class - CLASS_CODE_USER_PROG1] &
7100             TCAM_KEY_DISC)
7101                 nfc->data = RXH_DISCARD;
7102         else
7103                 nfc->data = niu_flowkey_to_ethflow(np->parent->flow_key[class -
7104                                                       CLASS_CODE_USER_PROG1]);
7105         return 0;
7106 }
7107 
7108 static void niu_get_ip4fs_from_tcam_key(struct niu_tcam_entry *tp,
7109                                         struct ethtool_rx_flow_spec *fsp)
7110 {
7111         u32 tmp;
7112         u16 prt;
7113 
7114         tmp = (tp->key[3] & TCAM_V4KEY3_SADDR) >> TCAM_V4KEY3_SADDR_SHIFT;
7115         fsp->h_u.tcp_ip4_spec.ip4src = cpu_to_be32(tmp);
7116 
7117         tmp = (tp->key[3] & TCAM_V4KEY3_DADDR) >> TCAM_V4KEY3_DADDR_SHIFT;
7118         fsp->h_u.tcp_ip4_spec.ip4dst = cpu_to_be32(tmp);
7119 
7120         tmp = (tp->key_mask[3] & TCAM_V4KEY3_SADDR) >> TCAM_V4KEY3_SADDR_SHIFT;
7121         fsp->m_u.tcp_ip4_spec.ip4src = cpu_to_be32(tmp);
7122 
7123         tmp = (tp->key_mask[3] & TCAM_V4KEY3_DADDR) >> TCAM_V4KEY3_DADDR_SHIFT;
7124         fsp->m_u.tcp_ip4_spec.ip4dst = cpu_to_be32(tmp);
7125 
7126         fsp->h_u.tcp_ip4_spec.tos = (tp->key[2] & TCAM_V4KEY2_TOS) >>
7127                 TCAM_V4KEY2_TOS_SHIFT;
7128         fsp->m_u.tcp_ip4_spec.tos = (tp->key_mask[2] & TCAM_V4KEY2_TOS) >>
7129                 TCAM_V4KEY2_TOS_SHIFT;
7130 
7131         switch (fsp->flow_type) {
7132         case TCP_V4_FLOW:
7133         case UDP_V4_FLOW:
7134         case SCTP_V4_FLOW:
7135                 prt = ((tp->key[2] & TCAM_V4KEY2_PORT_SPI) >>
7136                         TCAM_V4KEY2_PORT_SPI_SHIFT) >> 16;
7137                 fsp->h_u.tcp_ip4_spec.psrc = cpu_to_be16(prt);
7138 
7139                 prt = ((tp->key[2] & TCAM_V4KEY2_PORT_SPI) >>
7140                         TCAM_V4KEY2_PORT_SPI_SHIFT) & 0xffff;
7141                 fsp->h_u.tcp_ip4_spec.pdst = cpu_to_be16(prt);
7142 
7143                 prt = ((tp->key_mask[2] & TCAM_V4KEY2_PORT_SPI) >>
7144                         TCAM_V4KEY2_PORT_SPI_SHIFT) >> 16;
7145                 fsp->m_u.tcp_ip4_spec.psrc = cpu_to_be16(prt);
71