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/oki-semi/pch_gbe/pch_gbe_main.c

  1 /*
  2  * Copyright (C) 1999 - 2010 Intel Corporation.
  3  * Copyright (C) 2010 - 2012 LAPIS SEMICONDUCTOR CO., LTD.
  4  *
  5  * This code was derived from the Intel e1000e Linux driver.
  6  *
  7  * This program is free software; you can redistribute it and/or modify
  8  * it under the terms of the GNU General Public License as published by
  9  * the Free Software Foundation; version 2 of the License.
 10  *
 11  * This program is distributed in the hope that it will be useful,
 12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
 13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 14  * GNU General Public License for more details.
 15  *
 16  * You should have received a copy of the GNU General Public License
 17  * along with this program; if not, see <http://www.gnu.org/licenses/>.
 18  */
 19 
 20 #include "pch_gbe.h"
 21 #include "pch_gbe_api.h"
 22 #include <linux/module.h>
 23 #include <linux/net_tstamp.h>
 24 #include <linux/ptp_classify.h>
 25 #include <linux/gpio.h>
 26 
 27 #define DRV_VERSION     "1.01"
 28 const char pch_driver_version[] = DRV_VERSION;
 29 
 30 #define PCI_DEVICE_ID_INTEL_IOH1_GBE    0x8802          /* Pci device ID */
 31 #define PCH_GBE_MAR_ENTRIES             16
 32 #define PCH_GBE_SHORT_PKT               64
 33 #define DSC_INIT16                      0xC000
 34 #define PCH_GBE_DMA_ALIGN               0
 35 #define PCH_GBE_DMA_PADDING             2
 36 #define PCH_GBE_WATCHDOG_PERIOD         (5 * HZ)        /* watchdog time */
 37 #define PCH_GBE_COPYBREAK_DEFAULT       256
 38 #define PCH_GBE_PCI_BAR                 1
 39 #define PCH_GBE_RESERVE_MEMORY          0x200000        /* 2MB */
 40 
 41 /* Macros for ML7223 */
 42 #define PCI_VENDOR_ID_ROHM                      0x10db
 43 #define PCI_DEVICE_ID_ROHM_ML7223_GBE           0x8013
 44 
 45 /* Macros for ML7831 */
 46 #define PCI_DEVICE_ID_ROHM_ML7831_GBE           0x8802
 47 
 48 #define PCH_GBE_TX_WEIGHT         64
 49 #define PCH_GBE_RX_WEIGHT         64
 50 #define PCH_GBE_RX_BUFFER_WRITE   16
 51 
 52 /* Initialize the wake-on-LAN settings */
 53 #define PCH_GBE_WL_INIT_SETTING    (PCH_GBE_WLC_MP)
 54 
 55 #define PCH_GBE_MAC_RGMII_CTRL_SETTING ( \
 56         PCH_GBE_CHIP_TYPE_INTERNAL | \
 57         PCH_GBE_RGMII_MODE_RGMII     \
 58         )
 59 
 60 /* Ethertype field values */
 61 #define PCH_GBE_MAX_RX_BUFFER_SIZE      0x2880
 62 #define PCH_GBE_MAX_JUMBO_FRAME_SIZE    10318
 63 #define PCH_GBE_FRAME_SIZE_2048         2048
 64 #define PCH_GBE_FRAME_SIZE_4096         4096
 65 #define PCH_GBE_FRAME_SIZE_8192         8192
 66 
 67 #define PCH_GBE_GET_DESC(R, i, type)    (&(((struct type *)((R).desc))[i]))
 68 #define PCH_GBE_RX_DESC(R, i)           PCH_GBE_GET_DESC(R, i, pch_gbe_rx_desc)
 69 #define PCH_GBE_TX_DESC(R, i)           PCH_GBE_GET_DESC(R, i, pch_gbe_tx_desc)
 70 #define PCH_GBE_DESC_UNUSED(R) \
 71         ((((R)->next_to_clean > (R)->next_to_use) ? 0 : (R)->count) + \
 72         (R)->next_to_clean - (R)->next_to_use - 1)
 73 
 74 /* Pause packet value */
 75 #define PCH_GBE_PAUSE_PKT1_VALUE    0x00C28001
 76 #define PCH_GBE_PAUSE_PKT2_VALUE    0x00000100
 77 #define PCH_GBE_PAUSE_PKT4_VALUE    0x01000888
 78 #define PCH_GBE_PAUSE_PKT5_VALUE    0x0000FFFF
 79 
 80 
 81 /* This defines the bits that are set in the Interrupt Mask
 82  * Set/Read Register.  Each bit is documented below:
 83  *   o RXT0   = Receiver Timer Interrupt (ring 0)
 84  *   o TXDW   = Transmit Descriptor Written Back
 85  *   o RXDMT0 = Receive Descriptor Minimum Threshold hit (ring 0)
 86  *   o RXSEQ  = Receive Sequence Error
 87  *   o LSC    = Link Status Change
 88  */
 89 #define PCH_GBE_INT_ENABLE_MASK ( \
 90         PCH_GBE_INT_RX_DMA_CMPLT |    \
 91         PCH_GBE_INT_RX_DSC_EMP   |    \
 92         PCH_GBE_INT_RX_FIFO_ERR  |    \
 93         PCH_GBE_INT_WOL_DET      |    \
 94         PCH_GBE_INT_TX_CMPLT          \
 95         )
 96 
 97 #define PCH_GBE_INT_DISABLE_ALL         0
 98 
 99 /* Macros for ieee1588 */
100 /* 0x40 Time Synchronization Channel Control Register Bits */
101 #define MASTER_MODE   (1<<0)
102 #define SLAVE_MODE    (0)
103 #define V2_MODE       (1<<31)
104 #define CAP_MODE0     (0)
105 #define CAP_MODE2     (1<<17)
106 
107 /* 0x44 Time Synchronization Channel Event Register Bits */
108 #define TX_SNAPSHOT_LOCKED (1<<0)
109 #define RX_SNAPSHOT_LOCKED (1<<1)
110 
111 #define PTP_L4_MULTICAST_SA "01:00:5e:00:01:81"
112 #define PTP_L2_MULTICAST_SA "01:1b:19:00:00:00"
113 
114 #define MINNOW_PHY_RESET_GPIO           13
115 
116 static unsigned int copybreak __read_mostly = PCH_GBE_COPYBREAK_DEFAULT;
117 
118 static int pch_gbe_mdio_read(struct net_device *netdev, int addr, int reg);
119 static void pch_gbe_mdio_write(struct net_device *netdev, int addr, int reg,
120                                int data);
121 static void pch_gbe_set_multi(struct net_device *netdev);
122 
123 static int pch_ptp_match(struct sk_buff *skb, u16 uid_hi, u32 uid_lo, u16 seqid)
124 {
125         u8 *data = skb->data;
126         unsigned int offset;
127         u16 *hi, *id;
128         u32 lo;
129 
130         if (ptp_classify_raw(skb) == PTP_CLASS_NONE)
131                 return 0;
132 
133         offset = ETH_HLEN + IPV4_HLEN(data) + UDP_HLEN;
134 
135         if (skb->len < offset + OFF_PTP_SEQUENCE_ID + sizeof(seqid))
136                 return 0;
137 
138         hi = (u16 *)(data + offset + OFF_PTP_SOURCE_UUID);
139         id = (u16 *)(data + offset + OFF_PTP_SEQUENCE_ID);
140 
141         memcpy(&lo, &hi[1], sizeof(lo));
142 
143         return (uid_hi == *hi &&
144                 uid_lo == lo &&
145                 seqid  == *id);
146 }
147 
148 static void
149 pch_rx_timestamp(struct pch_gbe_adapter *adapter, struct sk_buff *skb)
150 {
151         struct skb_shared_hwtstamps *shhwtstamps;
152         struct pci_dev *pdev;
153         u64 ns;
154         u32 hi, lo, val;
155         u16 uid, seq;
156 
157         if (!adapter->hwts_rx_en)
158                 return;
159 
160         /* Get ieee1588's dev information */
161         pdev = adapter->ptp_pdev;
162 
163         val = pch_ch_event_read(pdev);
164 
165         if (!(val & RX_SNAPSHOT_LOCKED))
166                 return;
167 
168         lo = pch_src_uuid_lo_read(pdev);
169         hi = pch_src_uuid_hi_read(pdev);
170 
171         uid = hi & 0xffff;
172         seq = (hi >> 16) & 0xffff;
173 
174         if (!pch_ptp_match(skb, htons(uid), htonl(lo), htons(seq)))
175                 goto out;
176 
177         ns = pch_rx_snap_read(pdev);
178 
179         shhwtstamps = skb_hwtstamps(skb);
180         memset(shhwtstamps, 0, sizeof(*shhwtstamps));
181         shhwtstamps->hwtstamp = ns_to_ktime(ns);
182 out:
183         pch_ch_event_write(pdev, RX_SNAPSHOT_LOCKED);
184 }
185 
186 static void
187 pch_tx_timestamp(struct pch_gbe_adapter *adapter, struct sk_buff *skb)
188 {
189         struct skb_shared_hwtstamps shhwtstamps;
190         struct pci_dev *pdev;
191         struct skb_shared_info *shtx;
192         u64 ns;
193         u32 cnt, val;
194 
195         shtx = skb_shinfo(skb);
196         if (likely(!(shtx->tx_flags & SKBTX_HW_TSTAMP && adapter->hwts_tx_en)))
197                 return;
198 
199         shtx->tx_flags |= SKBTX_IN_PROGRESS;
200 
201         /* Get ieee1588's dev information */
202         pdev = adapter->ptp_pdev;
203 
204         /*
205          * This really stinks, but we have to poll for the Tx time stamp.
206          */
207         for (cnt = 0; cnt < 100; cnt++) {
208                 val = pch_ch_event_read(pdev);
209                 if (val & TX_SNAPSHOT_LOCKED)
210                         break;
211                 udelay(1);
212         }
213         if (!(val & TX_SNAPSHOT_LOCKED)) {
214                 shtx->tx_flags &= ~SKBTX_IN_PROGRESS;
215                 return;
216         }
217 
218         ns = pch_tx_snap_read(pdev);
219 
220         memset(&shhwtstamps, 0, sizeof(shhwtstamps));
221         shhwtstamps.hwtstamp = ns_to_ktime(ns);
222         skb_tstamp_tx(skb, &shhwtstamps);
223 
224         pch_ch_event_write(pdev, TX_SNAPSHOT_LOCKED);
225 }
226 
227 static int hwtstamp_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
228 {
229         struct hwtstamp_config cfg;
230         struct pch_gbe_adapter *adapter = netdev_priv(netdev);
231         struct pci_dev *pdev;
232         u8 station[20];
233 
234         if (copy_from_user(&cfg, ifr->ifr_data, sizeof(cfg)))
235                 return -EFAULT;
236 
237         if (cfg.flags) /* reserved for future extensions */
238                 return -EINVAL;
239 
240         /* Get ieee1588's dev information */
241         pdev = adapter->ptp_pdev;
242 
243         if (cfg.tx_type != HWTSTAMP_TX_OFF && cfg.tx_type != HWTSTAMP_TX_ON)
244                 return -ERANGE;
245 
246         switch (cfg.rx_filter) {
247         case HWTSTAMP_FILTER_NONE:
248                 adapter->hwts_rx_en = 0;
249                 break;
250         case HWTSTAMP_FILTER_PTP_V1_L4_SYNC:
251                 adapter->hwts_rx_en = 0;
252                 pch_ch_control_write(pdev, SLAVE_MODE | CAP_MODE0);
253                 break;
254         case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ:
255                 adapter->hwts_rx_en = 1;
256                 pch_ch_control_write(pdev, MASTER_MODE | CAP_MODE0);
257                 break;
258         case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
259                 adapter->hwts_rx_en = 1;
260                 pch_ch_control_write(pdev, V2_MODE | CAP_MODE2);
261                 strcpy(station, PTP_L4_MULTICAST_SA);
262                 pch_set_station_address(station, pdev);
263                 break;
264         case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
265                 adapter->hwts_rx_en = 1;
266                 pch_ch_control_write(pdev, V2_MODE | CAP_MODE2);
267                 strcpy(station, PTP_L2_MULTICAST_SA);
268                 pch_set_station_address(station, pdev);
269                 break;
270         default:
271                 return -ERANGE;
272         }
273 
274         adapter->hwts_tx_en = cfg.tx_type == HWTSTAMP_TX_ON;
275 
276         /* Clear out any old time stamps. */
277         pch_ch_event_write(pdev, TX_SNAPSHOT_LOCKED | RX_SNAPSHOT_LOCKED);
278 
279         return copy_to_user(ifr->ifr_data, &cfg, sizeof(cfg)) ? -EFAULT : 0;
280 }
281 
282 static inline void pch_gbe_mac_load_mac_addr(struct pch_gbe_hw *hw)
283 {
284         iowrite32(0x01, &hw->reg->MAC_ADDR_LOAD);
285 }
286 
287 /**
288  * pch_gbe_mac_read_mac_addr - Read MAC address
289  * @hw:             Pointer to the HW structure
290  * Returns:
291  *      0:                      Successful.
292  */
293 s32 pch_gbe_mac_read_mac_addr(struct pch_gbe_hw *hw)
294 {
295         struct pch_gbe_adapter *adapter = pch_gbe_hw_to_adapter(hw);
296         u32  adr1a, adr1b;
297 
298         adr1a = ioread32(&hw->reg->mac_adr[0].high);
299         adr1b = ioread32(&hw->reg->mac_adr[0].low);
300 
301         hw->mac.addr[0] = (u8)(adr1a & 0xFF);
302         hw->mac.addr[1] = (u8)((adr1a >> 8) & 0xFF);
303         hw->mac.addr[2] = (u8)((adr1a >> 16) & 0xFF);
304         hw->mac.addr[3] = (u8)((adr1a >> 24) & 0xFF);
305         hw->mac.addr[4] = (u8)(adr1b & 0xFF);
306         hw->mac.addr[5] = (u8)((adr1b >> 8) & 0xFF);
307 
308         netdev_dbg(adapter->netdev, "hw->mac.addr : %pM\n", hw->mac.addr);
309         return 0;
310 }
311 
312 /**
313  * pch_gbe_wait_clr_bit - Wait to clear a bit
314  * @reg:        Pointer of register
315  * @busy:       Busy bit
316  */
317 static void pch_gbe_wait_clr_bit(void *reg, u32 bit)
318 {
319         u32 tmp;
320 
321         /* wait busy */
322         tmp = 1000;
323         while ((ioread32(reg) & bit) && --tmp)
324                 cpu_relax();
325         if (!tmp)
326                 pr_err("Error: busy bit is not cleared\n");
327 }
328 
329 /**
330  * pch_gbe_mac_mar_set - Set MAC address register
331  * @hw:     Pointer to the HW structure
332  * @addr:   Pointer to the MAC address
333  * @index:  MAC address array register
334  */
335 static void pch_gbe_mac_mar_set(struct pch_gbe_hw *hw, u8 * addr, u32 index)
336 {
337         struct pch_gbe_adapter *adapter = pch_gbe_hw_to_adapter(hw);
338         u32 mar_low, mar_high, adrmask;
339 
340         netdev_dbg(adapter->netdev, "index : 0x%x\n", index);
341 
342         /*
343          * HW expects these in little endian so we reverse the byte order
344          * from network order (big endian) to little endian
345          */
346         mar_high = ((u32) addr[0] | ((u32) addr[1] << 8) |
347                    ((u32) addr[2] << 16) | ((u32) addr[3] << 24));
348         mar_low = ((u32) addr[4] | ((u32) addr[5] << 8));
349         /* Stop the MAC Address of index. */
350         adrmask = ioread32(&hw->reg->ADDR_MASK);
351         iowrite32((adrmask | (0x0001 << index)), &hw->reg->ADDR_MASK);
352         /* wait busy */
353         pch_gbe_wait_clr_bit(&hw->reg->ADDR_MASK, PCH_GBE_BUSY);
354         /* Set the MAC address to the MAC address 1A/1B register */
355         iowrite32(mar_high, &hw->reg->mac_adr[index].high);
356         iowrite32(mar_low, &hw->reg->mac_adr[index].low);
357         /* Start the MAC address of index */
358         iowrite32((adrmask & ~(0x0001 << index)), &hw->reg->ADDR_MASK);
359         /* wait busy */
360         pch_gbe_wait_clr_bit(&hw->reg->ADDR_MASK, PCH_GBE_BUSY);
361 }
362 
363 /**
364  * pch_gbe_mac_reset_hw - Reset hardware
365  * @hw: Pointer to the HW structure
366  */
367 static void pch_gbe_mac_reset_hw(struct pch_gbe_hw *hw)
368 {
369         /* Read the MAC address. and store to the private data */
370         pch_gbe_mac_read_mac_addr(hw);
371         iowrite32(PCH_GBE_ALL_RST, &hw->reg->RESET);
372 #ifdef PCH_GBE_MAC_IFOP_RGMII
373         iowrite32(PCH_GBE_MODE_GMII_ETHER, &hw->reg->MODE);
374 #endif
375         pch_gbe_wait_clr_bit(&hw->reg->RESET, PCH_GBE_ALL_RST);
376         /* Setup the receive addresses */
377         pch_gbe_mac_mar_set(hw, hw->mac.addr, 0);
378         return;
379 }
380 
381 static void pch_gbe_disable_mac_rx(struct pch_gbe_hw *hw)
382 {
383         u32 rctl;
384         /* Disables Receive MAC */
385         rctl = ioread32(&hw->reg->MAC_RX_EN);
386         iowrite32((rctl & ~PCH_GBE_MRE_MAC_RX_EN), &hw->reg->MAC_RX_EN);
387 }
388 
389 static void pch_gbe_enable_mac_rx(struct pch_gbe_hw *hw)
390 {
391         u32 rctl;
392         /* Enables Receive MAC */
393         rctl = ioread32(&hw->reg->MAC_RX_EN);
394         iowrite32((rctl | PCH_GBE_MRE_MAC_RX_EN), &hw->reg->MAC_RX_EN);
395 }
396 
397 /**
398  * pch_gbe_mac_init_rx_addrs - Initialize receive address's
399  * @hw: Pointer to the HW structure
400  * @mar_count: Receive address registers
401  */
402 static void pch_gbe_mac_init_rx_addrs(struct pch_gbe_hw *hw, u16 mar_count)
403 {
404         u32 i;
405 
406         /* Setup the receive address */
407         pch_gbe_mac_mar_set(hw, hw->mac.addr, 0);
408 
409         /* Zero out the other receive addresses */
410         for (i = 1; i < mar_count; i++) {
411                 iowrite32(0, &hw->reg->mac_adr[i].high);
412                 iowrite32(0, &hw->reg->mac_adr[i].low);
413         }
414         iowrite32(0xFFFE, &hw->reg->ADDR_MASK);
415         /* wait busy */
416         pch_gbe_wait_clr_bit(&hw->reg->ADDR_MASK, PCH_GBE_BUSY);
417 }
418 
419 
420 /**
421  * pch_gbe_mac_mc_addr_list_update - Update Multicast addresses
422  * @hw:             Pointer to the HW structure
423  * @mc_addr_list:   Array of multicast addresses to program
424  * @mc_addr_count:  Number of multicast addresses to program
425  * @mar_used_count: The first MAC Address register free to program
426  * @mar_total_num:  Total number of supported MAC Address Registers
427  */
428 static void pch_gbe_mac_mc_addr_list_update(struct pch_gbe_hw *hw,
429                                             u8 *mc_addr_list, u32 mc_addr_count,
430                                             u32 mar_used_count, u32 mar_total_num)
431 {
432         u32 i, adrmask;
433 
434         /* Load the first set of multicast addresses into the exact
435          * filters (RAR).  If there are not enough to fill the RAR
436          * array, clear the filters.
437          */
438         for (i = mar_used_count; i < mar_total_num; i++) {
439                 if (mc_addr_count) {
440                         pch_gbe_mac_mar_set(hw, mc_addr_list, i);
441                         mc_addr_count--;
442                         mc_addr_list += ETH_ALEN;
443                 } else {
444                         /* Clear MAC address mask */
445                         adrmask = ioread32(&hw->reg->ADDR_MASK);
446                         iowrite32((adrmask | (0x0001 << i)),
447                                         &hw->reg->ADDR_MASK);
448                         /* wait busy */
449                         pch_gbe_wait_clr_bit(&hw->reg->ADDR_MASK, PCH_GBE_BUSY);
450                         /* Clear MAC address */
451                         iowrite32(0, &hw->reg->mac_adr[i].high);
452                         iowrite32(0, &hw->reg->mac_adr[i].low);
453                 }
454         }
455 }
456 
457 /**
458  * pch_gbe_mac_force_mac_fc - Force the MAC's flow control settings
459  * @hw:             Pointer to the HW structure
460  * Returns:
461  *      0:                      Successful.
462  *      Negative value:         Failed.
463  */
464 s32 pch_gbe_mac_force_mac_fc(struct pch_gbe_hw *hw)
465 {
466         struct pch_gbe_adapter *adapter = pch_gbe_hw_to_adapter(hw);
467         struct pch_gbe_mac_info *mac = &hw->mac;
468         u32 rx_fctrl;
469 
470         netdev_dbg(adapter->netdev, "mac->fc = %u\n", mac->fc);
471 
472         rx_fctrl = ioread32(&hw->reg->RX_FCTRL);
473 
474         switch (mac->fc) {
475         case PCH_GBE_FC_NONE:
476                 rx_fctrl &= ~PCH_GBE_FL_CTRL_EN;
477                 mac->tx_fc_enable = false;
478                 break;
479         case PCH_GBE_FC_RX_PAUSE:
480                 rx_fctrl |= PCH_GBE_FL_CTRL_EN;
481                 mac->tx_fc_enable = false;
482                 break;
483         case PCH_GBE_FC_TX_PAUSE:
484                 rx_fctrl &= ~PCH_GBE_FL_CTRL_EN;
485                 mac->tx_fc_enable = true;
486                 break;
487         case PCH_GBE_FC_FULL:
488                 rx_fctrl |= PCH_GBE_FL_CTRL_EN;
489                 mac->tx_fc_enable = true;
490                 break;
491         default:
492                 netdev_err(adapter->netdev,
493                            "Flow control param set incorrectly\n");
494                 return -EINVAL;
495         }
496         if (mac->link_duplex == DUPLEX_HALF)
497                 rx_fctrl &= ~PCH_GBE_FL_CTRL_EN;
498         iowrite32(rx_fctrl, &hw->reg->RX_FCTRL);
499         netdev_dbg(adapter->netdev,
500                    "RX_FCTRL reg : 0x%08x  mac->tx_fc_enable : %d\n",
501                    ioread32(&hw->reg->RX_FCTRL), mac->tx_fc_enable);
502         return 0;
503 }
504 
505 /**
506  * pch_gbe_mac_set_wol_event - Set wake-on-lan event
507  * @hw:     Pointer to the HW structure
508  * @wu_evt: Wake up event
509  */
510 static void pch_gbe_mac_set_wol_event(struct pch_gbe_hw *hw, u32 wu_evt)
511 {
512         struct pch_gbe_adapter *adapter = pch_gbe_hw_to_adapter(hw);
513         u32 addr_mask;
514 
515         netdev_dbg(adapter->netdev, "wu_evt : 0x%08x  ADDR_MASK reg : 0x%08x\n",
516                    wu_evt, ioread32(&hw->reg->ADDR_MASK));
517 
518         if (wu_evt) {
519                 /* Set Wake-On-Lan address mask */
520                 addr_mask = ioread32(&hw->reg->ADDR_MASK);
521                 iowrite32(addr_mask, &hw->reg->WOL_ADDR_MASK);
522                 /* wait busy */
523                 pch_gbe_wait_clr_bit(&hw->reg->WOL_ADDR_MASK, PCH_GBE_WLA_BUSY);
524                 iowrite32(0, &hw->reg->WOL_ST);
525                 iowrite32((wu_evt | PCH_GBE_WLC_WOL_MODE), &hw->reg->WOL_CTRL);
526                 iowrite32(0x02, &hw->reg->TCPIP_ACC);
527                 iowrite32(PCH_GBE_INT_ENABLE_MASK, &hw->reg->INT_EN);
528         } else {
529                 iowrite32(0, &hw->reg->WOL_CTRL);
530                 iowrite32(0, &hw->reg->WOL_ST);
531         }
532         return;
533 }
534 
535 /**
536  * pch_gbe_mac_ctrl_miim - Control MIIM interface
537  * @hw:   Pointer to the HW structure
538  * @addr: Address of PHY
539  * @dir:  Operetion. (Write or Read)
540  * @reg:  Access register of PHY
541  * @data: Write data.
542  *
543  * Returns: Read date.
544  */
545 u16 pch_gbe_mac_ctrl_miim(struct pch_gbe_hw *hw, u32 addr, u32 dir, u32 reg,
546                         u16 data)
547 {
548         struct pch_gbe_adapter *adapter = pch_gbe_hw_to_adapter(hw);
549         u32 data_out = 0;
550         unsigned int i;
551         unsigned long flags;
552 
553         spin_lock_irqsave(&hw->miim_lock, flags);
554 
555         for (i = 100; i; --i) {
556                 if ((ioread32(&hw->reg->MIIM) & PCH_GBE_MIIM_OPER_READY))
557                         break;
558                 udelay(20);
559         }
560         if (i == 0) {
561                 netdev_err(adapter->netdev, "pch-gbe.miim won't go Ready\n");
562                 spin_unlock_irqrestore(&hw->miim_lock, flags);
563                 return 0;       /* No way to indicate timeout error */
564         }
565         iowrite32(((reg << PCH_GBE_MIIM_REG_ADDR_SHIFT) |
566                   (addr << PCH_GBE_MIIM_PHY_ADDR_SHIFT) |
567                   dir | data), &hw->reg->MIIM);
568         for (i = 0; i < 100; i++) {
569                 udelay(20);
570                 data_out = ioread32(&hw->reg->MIIM);
571                 if ((data_out & PCH_GBE_MIIM_OPER_READY))
572                         break;
573         }
574         spin_unlock_irqrestore(&hw->miim_lock, flags);
575 
576         netdev_dbg(adapter->netdev, "PHY %s: reg=%d, data=0x%04X\n",
577                    dir == PCH_GBE_MIIM_OPER_READ ? "READ" : "WRITE", reg,
578                    dir == PCH_GBE_MIIM_OPER_READ ? data_out : data);
579         return (u16) data_out;
580 }
581 
582 /**
583  * pch_gbe_mac_set_pause_packet - Set pause packet
584  * @hw:   Pointer to the HW structure
585  */
586 static void pch_gbe_mac_set_pause_packet(struct pch_gbe_hw *hw)
587 {
588         struct pch_gbe_adapter *adapter = pch_gbe_hw_to_adapter(hw);
589         unsigned long tmp2, tmp3;
590 
591         /* Set Pause packet */
592         tmp2 = hw->mac.addr[1];
593         tmp2 = (tmp2 << 8) | hw->mac.addr[0];
594         tmp2 = PCH_GBE_PAUSE_PKT2_VALUE | (tmp2 << 16);
595 
596         tmp3 = hw->mac.addr[5];
597         tmp3 = (tmp3 << 8) | hw->mac.addr[4];
598         tmp3 = (tmp3 << 8) | hw->mac.addr[3];
599         tmp3 = (tmp3 << 8) | hw->mac.addr[2];
600 
601         iowrite32(PCH_GBE_PAUSE_PKT1_VALUE, &hw->reg->PAUSE_PKT1);
602         iowrite32(tmp2, &hw->reg->PAUSE_PKT2);
603         iowrite32(tmp3, &hw->reg->PAUSE_PKT3);
604         iowrite32(PCH_GBE_PAUSE_PKT4_VALUE, &hw->reg->PAUSE_PKT4);
605         iowrite32(PCH_GBE_PAUSE_PKT5_VALUE, &hw->reg->PAUSE_PKT5);
606 
607         /* Transmit Pause Packet */
608         iowrite32(PCH_GBE_PS_PKT_RQ, &hw->reg->PAUSE_REQ);
609 
610         netdev_dbg(adapter->netdev,
611                    "PAUSE_PKT1-5 reg : 0x%08x 0x%08x 0x%08x 0x%08x 0x%08x\n",
612                    ioread32(&hw->reg->PAUSE_PKT1),
613                    ioread32(&hw->reg->PAUSE_PKT2),
614                    ioread32(&hw->reg->PAUSE_PKT3),
615                    ioread32(&hw->reg->PAUSE_PKT4),
616                    ioread32(&hw->reg->PAUSE_PKT5));
617 
618         return;
619 }
620 
621 
622 /**
623  * pch_gbe_alloc_queues - Allocate memory for all rings
624  * @adapter:  Board private structure to initialize
625  * Returns:
626  *      0:      Successfully
627  *      Negative value: Failed
628  */
629 static int pch_gbe_alloc_queues(struct pch_gbe_adapter *adapter)
630 {
631         adapter->tx_ring = devm_kzalloc(&adapter->pdev->dev,
632                                         sizeof(*adapter->tx_ring), GFP_KERNEL);
633         if (!adapter->tx_ring)
634                 return -ENOMEM;
635 
636         adapter->rx_ring = devm_kzalloc(&adapter->pdev->dev,
637                                         sizeof(*adapter->rx_ring), GFP_KERNEL);
638         if (!adapter->rx_ring)
639                 return -ENOMEM;
640         return 0;
641 }
642 
643 /**
644  * pch_gbe_init_stats - Initialize status
645  * @adapter:  Board private structure to initialize
646  */
647 static void pch_gbe_init_stats(struct pch_gbe_adapter *adapter)
648 {
649         memset(&adapter->stats, 0, sizeof(adapter->stats));
650         return;
651 }
652 
653 /**
654  * pch_gbe_init_phy - Initialize PHY
655  * @adapter:  Board private structure to initialize
656  * Returns:
657  *      0:      Successfully
658  *      Negative value: Failed
659  */
660 static int pch_gbe_init_phy(struct pch_gbe_adapter *adapter)
661 {
662         struct net_device *netdev = adapter->netdev;
663         u32 addr;
664         u16 bmcr, stat;
665 
666         /* Discover phy addr by searching addrs in order {1,0,2,..., 31} */
667         for (addr = 0; addr < PCH_GBE_PHY_REGS_LEN; addr++) {
668                 adapter->mii.phy_id = (addr == 0) ? 1 : (addr == 1) ? 0 : addr;
669                 bmcr = pch_gbe_mdio_read(netdev, adapter->mii.phy_id, MII_BMCR);
670                 stat = pch_gbe_mdio_read(netdev, adapter->mii.phy_id, MII_BMSR);
671                 stat = pch_gbe_mdio_read(netdev, adapter->mii.phy_id, MII_BMSR);
672                 if (!((bmcr == 0xFFFF) || ((stat == 0) && (bmcr == 0))))
673                         break;
674         }
675         adapter->hw.phy.addr = adapter->mii.phy_id;
676         netdev_dbg(netdev, "phy_addr = %d\n", adapter->mii.phy_id);
677         if (addr == PCH_GBE_PHY_REGS_LEN)
678                 return -EAGAIN;
679         /* Selected the phy and isolate the rest */
680         for (addr = 0; addr < PCH_GBE_PHY_REGS_LEN; addr++) {
681                 if (addr != adapter->mii.phy_id) {
682                         pch_gbe_mdio_write(netdev, addr, MII_BMCR,
683                                            BMCR_ISOLATE);
684                 } else {
685                         bmcr = pch_gbe_mdio_read(netdev, addr, MII_BMCR);
686                         pch_gbe_mdio_write(netdev, addr, MII_BMCR,
687                                            bmcr & ~BMCR_ISOLATE);
688                 }
689         }
690 
691         /* MII setup */
692         adapter->mii.phy_id_mask = 0x1F;
693         adapter->mii.reg_num_mask = 0x1F;
694         adapter->mii.dev = adapter->netdev;
695         adapter->mii.mdio_read = pch_gbe_mdio_read;
696         adapter->mii.mdio_write = pch_gbe_mdio_write;
697         adapter->mii.supports_gmii = mii_check_gmii_support(&adapter->mii);
698         return 0;
699 }
700 
701 /**
702  * pch_gbe_mdio_read - The read function for mii
703  * @netdev: Network interface device structure
704  * @addr:   Phy ID
705  * @reg:    Access location
706  * Returns:
707  *      0:      Successfully
708  *      Negative value: Failed
709  */
710 static int pch_gbe_mdio_read(struct net_device *netdev, int addr, int reg)
711 {
712         struct pch_gbe_adapter *adapter = netdev_priv(netdev);
713         struct pch_gbe_hw *hw = &adapter->hw;
714 
715         return pch_gbe_mac_ctrl_miim(hw, addr, PCH_GBE_HAL_MIIM_READ, reg,
716                                      (u16) 0);
717 }
718 
719 /**
720  * pch_gbe_mdio_write - The write function for mii
721  * @netdev: Network interface device structure
722  * @addr:   Phy ID (not used)
723  * @reg:    Access location
724  * @data:   Write data
725  */
726 static void pch_gbe_mdio_write(struct net_device *netdev,
727                                int addr, int reg, int data)
728 {
729         struct pch_gbe_adapter *adapter = netdev_priv(netdev);
730         struct pch_gbe_hw *hw = &adapter->hw;
731 
732         pch_gbe_mac_ctrl_miim(hw, addr, PCH_GBE_HAL_MIIM_WRITE, reg, data);
733 }
734 
735 /**
736  * pch_gbe_reset_task - Reset processing at the time of transmission timeout
737  * @work:  Pointer of board private structure
738  */
739 static void pch_gbe_reset_task(struct work_struct *work)
740 {
741         struct pch_gbe_adapter *adapter;
742         adapter = container_of(work, struct pch_gbe_adapter, reset_task);
743 
744         rtnl_lock();
745         pch_gbe_reinit_locked(adapter);
746         rtnl_unlock();
747 }
748 
749 /**
750  * pch_gbe_reinit_locked- Re-initialization
751  * @adapter:  Board private structure
752  */
753 void pch_gbe_reinit_locked(struct pch_gbe_adapter *adapter)
754 {
755         pch_gbe_down(adapter);
756         pch_gbe_up(adapter);
757 }
758 
759 /**
760  * pch_gbe_reset - Reset GbE
761  * @adapter:  Board private structure
762  */
763 void pch_gbe_reset(struct pch_gbe_adapter *adapter)
764 {
765         struct net_device *netdev = adapter->netdev;
766 
767         pch_gbe_mac_reset_hw(&adapter->hw);
768         /* reprogram multicast address register after reset */
769         pch_gbe_set_multi(netdev);
770         /* Setup the receive address. */
771         pch_gbe_mac_init_rx_addrs(&adapter->hw, PCH_GBE_MAR_ENTRIES);
772         if (pch_gbe_hal_init_hw(&adapter->hw))
773                 netdev_err(netdev, "Hardware Error\n");
774 }
775 
776 /**
777  * pch_gbe_free_irq - Free an interrupt
778  * @adapter:  Board private structure
779  */
780 static void pch_gbe_free_irq(struct pch_gbe_adapter *adapter)
781 {
782         struct net_device *netdev = adapter->netdev;
783 
784         free_irq(adapter->pdev->irq, netdev);
785         if (adapter->have_msi) {
786                 pci_disable_msi(adapter->pdev);
787                 netdev_dbg(netdev, "call pci_disable_msi\n");
788         }
789 }
790 
791 /**
792  * pch_gbe_irq_disable - Mask off interrupt generation on the NIC
793  * @adapter:  Board private structure
794  */
795 static void pch_gbe_irq_disable(struct pch_gbe_adapter *adapter)
796 {
797         struct pch_gbe_hw *hw = &adapter->hw;
798 
799         atomic_inc(&adapter->irq_sem);
800         iowrite32(0, &hw->reg->INT_EN);
801         ioread32(&hw->reg->INT_ST);
802         synchronize_irq(adapter->pdev->irq);
803 
804         netdev_dbg(adapter->netdev, "INT_EN reg : 0x%08x\n",
805                    ioread32(&hw->reg->INT_EN));
806 }
807 
808 /**
809  * pch_gbe_irq_enable - Enable default interrupt generation settings
810  * @adapter:  Board private structure
811  */
812 static void pch_gbe_irq_enable(struct pch_gbe_adapter *adapter)
813 {
814         struct pch_gbe_hw *hw = &adapter->hw;
815 
816         if (likely(atomic_dec_and_test(&adapter->irq_sem)))
817                 iowrite32(PCH_GBE_INT_ENABLE_MASK, &hw->reg->INT_EN);
818         ioread32(&hw->reg->INT_ST);
819         netdev_dbg(adapter->netdev, "INT_EN reg : 0x%08x\n",
820                    ioread32(&hw->reg->INT_EN));
821 }
822 
823 
824 
825 /**
826  * pch_gbe_setup_tctl - configure the Transmit control registers
827  * @adapter:  Board private structure
828  */
829 static void pch_gbe_setup_tctl(struct pch_gbe_adapter *adapter)
830 {
831         struct pch_gbe_hw *hw = &adapter->hw;
832         u32 tx_mode, tcpip;
833 
834         tx_mode = PCH_GBE_TM_LONG_PKT |
835                 PCH_GBE_TM_ST_AND_FD |
836                 PCH_GBE_TM_SHORT_PKT |
837                 PCH_GBE_TM_TH_TX_STRT_8 |
838                 PCH_GBE_TM_TH_ALM_EMP_4 | PCH_GBE_TM_TH_ALM_FULL_8;
839 
840         iowrite32(tx_mode, &hw->reg->TX_MODE);
841 
842         tcpip = ioread32(&hw->reg->TCPIP_ACC);
843         tcpip |= PCH_GBE_TX_TCPIPACC_EN;
844         iowrite32(tcpip, &hw->reg->TCPIP_ACC);
845         return;
846 }
847 
848 /**
849  * pch_gbe_configure_tx - Configure Transmit Unit after Reset
850  * @adapter:  Board private structure
851  */
852 static void pch_gbe_configure_tx(struct pch_gbe_adapter *adapter)
853 {
854         struct pch_gbe_hw *hw = &adapter->hw;
855         u32 tdba, tdlen, dctrl;
856 
857         netdev_dbg(adapter->netdev, "dma addr = 0x%08llx  size = 0x%08x\n",
858                    (unsigned long long)adapter->tx_ring->dma,
859                    adapter->tx_ring->size);
860 
861         /* Setup the HW Tx Head and Tail descriptor pointers */
862         tdba = adapter->tx_ring->dma;
863         tdlen = adapter->tx_ring->size - 0x10;
864         iowrite32(tdba, &hw->reg->TX_DSC_BASE);
865         iowrite32(tdlen, &hw->reg->TX_DSC_SIZE);
866         iowrite32(tdba, &hw->reg->TX_DSC_SW_P);
867 
868         /* Enables Transmission DMA */
869         dctrl = ioread32(&hw->reg->DMA_CTRL);
870         dctrl |= PCH_GBE_TX_DMA_EN;
871         iowrite32(dctrl, &hw->reg->DMA_CTRL);
872 }
873 
874 /**
875  * pch_gbe_setup_rctl - Configure the receive control registers
876  * @adapter:  Board private structure
877  */
878 static void pch_gbe_setup_rctl(struct pch_gbe_adapter *adapter)
879 {
880         struct pch_gbe_hw *hw = &adapter->hw;
881         u32 rx_mode, tcpip;
882 
883         rx_mode = PCH_GBE_ADD_FIL_EN | PCH_GBE_MLT_FIL_EN |
884         PCH_GBE_RH_ALM_EMP_4 | PCH_GBE_RH_ALM_FULL_4 | PCH_GBE_RH_RD_TRG_8;
885 
886         iowrite32(rx_mode, &hw->reg->RX_MODE);
887 
888         tcpip = ioread32(&hw->reg->TCPIP_ACC);
889 
890         tcpip |= PCH_GBE_RX_TCPIPACC_OFF;
891         tcpip &= ~PCH_GBE_RX_TCPIPACC_EN;
892         iowrite32(tcpip, &hw->reg->TCPIP_ACC);
893         return;
894 }
895 
896 /**
897  * pch_gbe_configure_rx - Configure Receive Unit after Reset
898  * @adapter:  Board private structure
899  */
900 static void pch_gbe_configure_rx(struct pch_gbe_adapter *adapter)
901 {
902         struct pch_gbe_hw *hw = &adapter->hw;
903         u32 rdba, rdlen, rxdma;
904 
905         netdev_dbg(adapter->netdev, "dma adr = 0x%08llx  size = 0x%08x\n",
906                    (unsigned long long)adapter->rx_ring->dma,
907                    adapter->rx_ring->size);
908 
909         pch_gbe_mac_force_mac_fc(hw);
910 
911         pch_gbe_disable_mac_rx(hw);
912 
913         /* Disables Receive DMA */
914         rxdma = ioread32(&hw->reg->DMA_CTRL);
915         rxdma &= ~PCH_GBE_RX_DMA_EN;
916         iowrite32(rxdma, &hw->reg->DMA_CTRL);
917 
918         netdev_dbg(adapter->netdev,
919                    "MAC_RX_EN reg = 0x%08x  DMA_CTRL reg = 0x%08x\n",
920                    ioread32(&hw->reg->MAC_RX_EN),
921                    ioread32(&hw->reg->DMA_CTRL));
922 
923         /* Setup the HW Rx Head and Tail Descriptor Pointers and
924          * the Base and Length of the Rx Descriptor Ring */
925         rdba = adapter->rx_ring->dma;
926         rdlen = adapter->rx_ring->size - 0x10;
927         iowrite32(rdba, &hw->reg->RX_DSC_BASE);
928         iowrite32(rdlen, &hw->reg->RX_DSC_SIZE);
929         iowrite32((rdba + rdlen), &hw->reg->RX_DSC_SW_P);
930 }
931 
932 /**
933  * pch_gbe_unmap_and_free_tx_resource - Unmap and free tx socket buffer
934  * @adapter:     Board private structure
935  * @buffer_info: Buffer information structure
936  */
937 static void pch_gbe_unmap_and_free_tx_resource(
938         struct pch_gbe_adapter *adapter, struct pch_gbe_buffer *buffer_info)
939 {
940         if (buffer_info->mapped) {
941                 dma_unmap_single(&adapter->pdev->dev, buffer_info->dma,
942                                  buffer_info->length, DMA_TO_DEVICE);
943                 buffer_info->mapped = false;
944         }
945         if (buffer_info->skb) {
946                 dev_kfree_skb_any(buffer_info->skb);
947                 buffer_info->skb = NULL;
948         }
949 }
950 
951 /**
952  * pch_gbe_unmap_and_free_rx_resource - Unmap and free rx socket buffer
953  * @adapter:      Board private structure
954  * @buffer_info:  Buffer information structure
955  */
956 static void pch_gbe_unmap_and_free_rx_resource(
957                                         struct pch_gbe_adapter *adapter,
958                                         struct pch_gbe_buffer *buffer_info)
959 {
960         if (buffer_info->mapped) {
961                 dma_unmap_single(&adapter->pdev->dev, buffer_info->dma,
962                                  buffer_info->length, DMA_FROM_DEVICE);
963                 buffer_info->mapped = false;
964         }
965         if (buffer_info->skb) {
966                 dev_kfree_skb_any(buffer_info->skb);
967                 buffer_info->skb = NULL;
968         }
969 }
970 
971 /**
972  * pch_gbe_clean_tx_ring - Free Tx Buffers
973  * @adapter:  Board private structure
974  * @tx_ring:  Ring to be cleaned
975  */
976 static void pch_gbe_clean_tx_ring(struct pch_gbe_adapter *adapter,
977                                    struct pch_gbe_tx_ring *tx_ring)
978 {
979         struct pch_gbe_hw *hw = &adapter->hw;
980         struct pch_gbe_buffer *buffer_info;
981         unsigned long size;
982         unsigned int i;
983 
984         /* Free all the Tx ring sk_buffs */
985         for (i = 0; i < tx_ring->count; i++) {
986                 buffer_info = &tx_ring->buffer_info[i];
987                 pch_gbe_unmap_and_free_tx_resource(adapter, buffer_info);
988         }
989         netdev_dbg(adapter->netdev,
990                    "call pch_gbe_unmap_and_free_tx_resource() %d count\n", i);
991 
992         size = (unsigned long)sizeof(struct pch_gbe_buffer) * tx_ring->count;
993         memset(tx_ring->buffer_info, 0, size);
994 
995         /* Zero out the descriptor ring */
996         memset(tx_ring->desc, 0, tx_ring->size);
997         tx_ring->next_to_use = 0;
998         tx_ring->next_to_clean = 0;
999         iowrite32(tx_ring->dma, &hw->reg->TX_DSC_HW_P);
1000         iowrite32((tx_ring->size - 0x10), &hw->reg->TX_DSC_SIZE);
1001 }
1002 
1003 /**
1004  * pch_gbe_clean_rx_ring - Free Rx Buffers
1005  * @adapter:  Board private structure
1006  * @rx_ring:  Ring to free buffers from
1007  */
1008 static void
1009 pch_gbe_clean_rx_ring(struct pch_gbe_adapter *adapter,
1010                       struct pch_gbe_rx_ring *rx_ring)
1011 {
1012         struct pch_gbe_hw *hw = &adapter->hw;
1013         struct pch_gbe_buffer *buffer_info;
1014         unsigned long size;
1015         unsigned int i;
1016 
1017         /* Free all the Rx ring sk_buffs */
1018         for (i = 0; i < rx_ring->count; i++) {
1019                 buffer_info = &rx_ring->buffer_info[i];
1020                 pch_gbe_unmap_and_free_rx_resource(adapter, buffer_info);
1021         }
1022         netdev_dbg(adapter->netdev,
1023                    "call pch_gbe_unmap_and_free_rx_resource() %d count\n", i);
1024         size = (unsigned long)sizeof(struct pch_gbe_buffer) * rx_ring->count;
1025         memset(rx_ring->buffer_info, 0, size);
1026 
1027         /* Zero out the descriptor ring */
1028         memset(rx_ring->desc, 0, rx_ring->size);
1029         rx_ring->next_to_clean = 0;
1030         rx_ring->next_to_use = 0;
1031         iowrite32(rx_ring->dma, &hw->reg->RX_DSC_HW_P);
1032         iowrite32((rx_ring->size - 0x10), &hw->reg->RX_DSC_SIZE);
1033 }
1034 
1035 static void pch_gbe_set_rgmii_ctrl(struct pch_gbe_adapter *adapter, u16 speed,
1036                                     u16 duplex)
1037 {
1038         struct pch_gbe_hw *hw = &adapter->hw;
1039         unsigned long rgmii = 0;
1040 
1041         /* Set the RGMII control. */
1042 #ifdef PCH_GBE_MAC_IFOP_RGMII
1043         switch (speed) {
1044         case SPEED_10:
1045                 rgmii = (PCH_GBE_RGMII_RATE_2_5M |
1046                          PCH_GBE_MAC_RGMII_CTRL_SETTING);
1047                 break;
1048         case SPEED_100:
1049                 rgmii = (PCH_GBE_RGMII_RATE_25M |
1050                          PCH_GBE_MAC_RGMII_CTRL_SETTING);
1051                 break;
1052         case SPEED_1000:
1053                 rgmii = (PCH_GBE_RGMII_RATE_125M |
1054                          PCH_GBE_MAC_RGMII_CTRL_SETTING);
1055                 break;
1056         }
1057         iowrite32(rgmii, &hw->reg->RGMII_CTRL);
1058 #else   /* GMII */
1059         rgmii = 0;
1060         iowrite32(rgmii, &hw->reg->RGMII_CTRL);
1061 #endif
1062 }
1063 static void pch_gbe_set_mode(struct pch_gbe_adapter *adapter, u16 speed,
1064                               u16 duplex)
1065 {
1066         struct net_device *netdev = adapter->netdev;
1067         struct pch_gbe_hw *hw = &adapter->hw;
1068         unsigned long mode = 0;
1069 
1070         /* Set the communication mode */
1071         switch (speed) {
1072         case SPEED_10:
1073                 mode = PCH_GBE_MODE_MII_ETHER;
1074                 netdev->tx_queue_len = 10;
1075                 break;
1076         case SPEED_100:
1077                 mode = PCH_GBE_MODE_MII_ETHER;
1078                 netdev->tx_queue_len = 100;
1079                 break;
1080         case SPEED_1000:
1081                 mode = PCH_GBE_MODE_GMII_ETHER;
1082                 break;
1083         }
1084         if (duplex == DUPLEX_FULL)
1085                 mode |= PCH_GBE_MODE_FULL_DUPLEX;
1086         else
1087                 mode |= PCH_GBE_MODE_HALF_DUPLEX;
1088         iowrite32(mode, &hw->reg->MODE);
1089 }
1090 
1091 /**
1092  * pch_gbe_watchdog - Watchdog process
1093  * @data:  Board private structure
1094  */
1095 static void pch_gbe_watchdog(unsigned long data)
1096 {
1097         struct pch_gbe_adapter *adapter = (struct pch_gbe_adapter *)data;
1098         struct net_device *netdev = adapter->netdev;
1099         struct pch_gbe_hw *hw = &adapter->hw;
1100 
1101         netdev_dbg(netdev, "right now = %ld\n", jiffies);
1102 
1103         pch_gbe_update_stats(adapter);
1104         if ((mii_link_ok(&adapter->mii)) && (!netif_carrier_ok(netdev))) {
1105                 struct ethtool_cmd cmd = { .cmd = ETHTOOL_GSET };
1106                 netdev->tx_queue_len = adapter->tx_queue_len;
1107                 /* mii library handles link maintenance tasks */
1108                 if (mii_ethtool_gset(&adapter->mii, &cmd)) {
1109                         netdev_err(netdev, "ethtool get setting Error\n");
1110                         mod_timer(&adapter->watchdog_timer,
1111                                   round_jiffies(jiffies +
1112                                                 PCH_GBE_WATCHDOG_PERIOD));
1113                         return;
1114                 }
1115                 hw->mac.link_speed = ethtool_cmd_speed(&cmd);
1116                 hw->mac.link_duplex = cmd.duplex;
1117                 /* Set the RGMII control. */
1118                 pch_gbe_set_rgmii_ctrl(adapter, hw->mac.link_speed,
1119                                                 hw->mac.link_duplex);
1120                 /* Set the communication mode */
1121                 pch_gbe_set_mode(adapter, hw->mac.link_speed,
1122                                  hw->mac.link_duplex);
1123                 netdev_dbg(netdev,
1124                            "Link is Up %d Mbps %s-Duplex\n",
1125                            hw->mac.link_speed,
1126                            cmd.duplex == DUPLEX_FULL ? "Full" : "Half");
1127                 netif_carrier_on(netdev);
1128                 netif_wake_queue(netdev);
1129         } else if ((!mii_link_ok(&adapter->mii)) &&
1130                    (netif_carrier_ok(netdev))) {
1131                 netdev_dbg(netdev, "NIC Link is Down\n");
1132                 hw->mac.link_speed = SPEED_10;
1133                 hw->mac.link_duplex = DUPLEX_HALF;
1134                 netif_carrier_off(netdev);
1135                 netif_stop_queue(netdev);
1136         }
1137         mod_timer(&adapter->watchdog_timer,
1138                   round_jiffies(jiffies + PCH_GBE_WATCHDOG_PERIOD));
1139 }
1140 
1141 /**
1142  * pch_gbe_tx_queue - Carry out queuing of the transmission data
1143  * @adapter:  Board private structure
1144  * @tx_ring:  Tx descriptor ring structure
1145  * @skb:      Sockt buffer structure
1146  */
1147 static void pch_gbe_tx_queue(struct pch_gbe_adapter *adapter,
1148                               struct pch_gbe_tx_ring *tx_ring,
1149                               struct sk_buff *skb)
1150 {
1151         struct pch_gbe_hw *hw = &adapter->hw;
1152         struct pch_gbe_tx_desc *tx_desc;
1153         struct pch_gbe_buffer *buffer_info;
1154         struct sk_buff *tmp_skb;
1155         unsigned int frame_ctrl;
1156         unsigned int ring_num;
1157 
1158         /*-- Set frame control --*/
1159         frame_ctrl = 0;
1160         if (unlikely(skb->len < PCH_GBE_SHORT_PKT))
1161                 frame_ctrl |= PCH_GBE_TXD_CTRL_APAD;
1162         if (skb->ip_summed == CHECKSUM_NONE)
1163                 frame_ctrl |= PCH_GBE_TXD_CTRL_TCPIP_ACC_OFF;
1164 
1165         /* Performs checksum processing */
1166         /*
1167          * It is because the hardware accelerator does not support a checksum,
1168          * when the received data size is less than 64 bytes.
1169          */
1170         if (skb->len < PCH_GBE_SHORT_PKT && skb->ip_summed != CHECKSUM_NONE) {
1171                 frame_ctrl |= PCH_GBE_TXD_CTRL_APAD |
1172                               PCH_GBE_TXD_CTRL_TCPIP_ACC_OFF;
1173                 if (skb->protocol == htons(ETH_P_IP)) {
1174                         struct iphdr *iph = ip_hdr(skb);
1175                         unsigned int offset;
1176                         offset = skb_transport_offset(skb);
1177                         if (iph->protocol == IPPROTO_TCP) {
1178                                 skb->csum = 0;
1179                                 tcp_hdr(skb)->check = 0;
1180                                 skb->csum = skb_checksum(skb, offset,
1181                                                          skb->len - offset, 0);
1182                                 tcp_hdr(skb)->check =
1183                                         csum_tcpudp_magic(iph->saddr,
1184                                                           iph->daddr,
1185                                                           skb->len - offset,
1186                                                           IPPROTO_TCP,
1187                                                           skb->csum);
1188                         } else if (iph->protocol == IPPROTO_UDP) {
1189                                 skb->csum = 0;
1190                                 udp_hdr(skb)->check = 0;
1191                                 skb->csum =
1192                                         skb_checksum(skb, offset,
1193                                                      skb->len - offset, 0);
1194                                 udp_hdr(skb)->check =
1195                                         csum_tcpudp_magic(iph->saddr,
1196                                                           iph->daddr,
1197                                                           skb->len - offset,
1198                                                           IPPROTO_UDP,
1199                                                           skb->csum);
1200                         }
1201                 }
1202         }
1203 
1204         ring_num = tx_ring->next_to_use;
1205         if (unlikely((ring_num + 1) == tx_ring->count))
1206                 tx_ring->next_to_use = 0;
1207         else
1208                 tx_ring->next_to_use = ring_num + 1;
1209 
1210 
1211         buffer_info = &tx_ring->buffer_info[ring_num];
1212         tmp_skb = buffer_info->skb;
1213 
1214         /* [Header:14][payload] ---> [Header:14][paddong:2][payload]    */
1215         memcpy(tmp_skb->data, skb->data, ETH_HLEN);
1216         tmp_skb->data[ETH_HLEN] = 0x00;
1217         tmp_skb->data[ETH_HLEN + 1] = 0x00;
1218         tmp_skb->len = skb->len;
1219         memcpy(&tmp_skb->data[ETH_HLEN + 2], &skb->data[ETH_HLEN],
1220                (skb->len - ETH_HLEN));
1221         /*-- Set Buffer information --*/
1222         buffer_info->length = tmp_skb->len;
1223         buffer_info->dma = dma_map_single(&adapter->pdev->dev, tmp_skb->data,
1224                                           buffer_info->length,
1225                                           DMA_TO_DEVICE);
1226         if (dma_mapping_error(&adapter->pdev->dev, buffer_info->dma)) {
1227                 netdev_err(adapter->netdev, "TX DMA map failed\n");
1228                 buffer_info->dma = 0;
1229                 buffer_info->time_stamp = 0;
1230                 tx_ring->next_to_use = ring_num;
1231                 return;
1232         }
1233         buffer_info->mapped = true;
1234         buffer_info->time_stamp = jiffies;
1235 
1236         /*-- Set Tx descriptor --*/
1237         tx_desc = PCH_GBE_TX_DESC(*tx_ring, ring_num);
1238         tx_desc->buffer_addr = (buffer_info->dma);
1239         tx_desc->length = (tmp_skb->len);
1240         tx_desc->tx_words_eob = ((tmp_skb->len + 3));
1241         tx_desc->tx_frame_ctrl = (frame_ctrl);
1242         tx_desc->gbec_status = (DSC_INIT16);
1243 
1244         if (unlikely(++ring_num == tx_ring->count))
1245                 ring_num = 0;
1246 
1247         /* Update software pointer of TX descriptor */
1248         iowrite32(tx_ring->dma +
1249                   (int)sizeof(struct pch_gbe_tx_desc) * ring_num,
1250                   &hw->reg->TX_DSC_SW_P);
1251 
1252         pch_tx_timestamp(adapter, skb);
1253 
1254         dev_kfree_skb_any(skb);
1255 }
1256 
1257 /**
1258  * pch_gbe_update_stats - Update the board statistics counters
1259  * @adapter:  Board private structure
1260  */
1261 void pch_gbe_update_stats(struct pch_gbe_adapter *adapter)
1262 {
1263         struct net_device *netdev = adapter->netdev;
1264         struct pci_dev *pdev = adapter->pdev;
1265         struct pch_gbe_hw_stats *stats = &adapter->stats;
1266         unsigned long flags;
1267 
1268         /*
1269          * Prevent stats update while adapter is being reset, or if the pci
1270          * connection is down.
1271          */
1272         if ((pdev->error_state) && (pdev->error_state != pci_channel_io_normal))
1273                 return;
1274 
1275         spin_lock_irqsave(&adapter->stats_lock, flags);
1276 
1277         /* Update device status "adapter->stats" */
1278         stats->rx_errors = stats->rx_crc_errors + stats->rx_frame_errors;
1279         stats->tx_errors = stats->tx_length_errors +
1280             stats->tx_aborted_errors +
1281             stats->tx_carrier_errors + stats->tx_timeout_count;
1282 
1283         /* Update network device status "adapter->net_stats" */
1284         netdev->stats.rx_packets = stats->rx_packets;
1285         netdev->stats.rx_bytes = stats->rx_bytes;
1286         netdev->stats.rx_dropped = stats->rx_dropped;
1287         netdev->stats.tx_packets = stats->tx_packets;
1288         netdev->stats.tx_bytes = stats->tx_bytes;
1289         netdev->stats.tx_dropped = stats->tx_dropped;
1290         /* Fill out the OS statistics structure */
1291         netdev->stats.multicast = stats->multicast;
1292         netdev->stats.collisions = stats->collisions;
1293         /* Rx Errors */
1294         netdev->stats.rx_errors = stats->rx_errors;
1295         netdev->stats.rx_crc_errors = stats->rx_crc_errors;
1296         netdev->stats.rx_frame_errors = stats->rx_frame_errors;
1297         /* Tx Errors */
1298         netdev->stats.tx_errors = stats->tx_errors;
1299         netdev->stats.tx_aborted_errors = stats->tx_aborted_errors;
1300         netdev->stats.tx_carrier_errors = stats->tx_carrier_errors;
1301 
1302         spin_unlock_irqrestore(&adapter->stats_lock, flags);
1303 }
1304 
1305 static void pch_gbe_disable_dma_rx(struct pch_gbe_hw *hw)
1306 {
1307         u32 rxdma;
1308 
1309         /* Disable Receive DMA */
1310         rxdma = ioread32(&hw->reg->DMA_CTRL);
1311         rxdma &= ~PCH_GBE_RX_DMA_EN;
1312         iowrite32(rxdma, &hw->reg->DMA_CTRL);
1313 }
1314 
1315 static void pch_gbe_enable_dma_rx(struct pch_gbe_hw *hw)
1316 {
1317         u32 rxdma;
1318 
1319         /* Enables Receive DMA */
1320         rxdma = ioread32(&hw->reg->DMA_CTRL);
1321         rxdma |= PCH_GBE_RX_DMA_EN;
1322         iowrite32(rxdma, &hw->reg->DMA_CTRL);
1323 }
1324 
1325 /**
1326  * pch_gbe_intr - Interrupt Handler
1327  * @irq:   Interrupt number
1328  * @data:  Pointer to a network interface device structure
1329  * Returns:
1330  *      - IRQ_HANDLED:  Our interrupt
1331  *      - IRQ_NONE:     Not our interrupt
1332  */
1333 static irqreturn_t pch_gbe_intr(int irq, void *data)
1334 {
1335         struct net_device *netdev = data;
1336         struct pch_gbe_adapter *adapter = netdev_priv(netdev);
1337         struct pch_gbe_hw *hw = &adapter->hw;
1338         u32 int_st;
1339         u32 int_en;
1340 
1341         /* Check request status */
1342         int_st = ioread32(&hw->reg->INT_ST);
1343         int_st = int_st & ioread32(&hw->reg->INT_EN);
1344         /* When request status is no interruption factor */
1345         if (unlikely(!int_st))
1346                 return IRQ_NONE;        /* Not our interrupt. End processing. */
1347         netdev_dbg(netdev, "%s occur int_st = 0x%08x\n", __func__, int_st);
1348         if (int_st & PCH_GBE_INT_RX_FRAME_ERR)
1349                 adapter->stats.intr_rx_frame_err_count++;
1350         if (int_st & PCH_GBE_INT_RX_FIFO_ERR)
1351                 if (!adapter->rx_stop_flag) {
1352                         adapter->stats.intr_rx_fifo_err_count++;
1353                         netdev_dbg(netdev, "Rx fifo over run\n");
1354                         adapter->rx_stop_flag = true;
1355                         int_en = ioread32(&hw->reg->INT_EN);
1356                         iowrite32((int_en & ~PCH_GBE_INT_RX_FIFO_ERR),
1357                                   &hw->reg->INT_EN);
1358                         pch_gbe_disable_dma_rx(&adapter->hw);
1359                         int_st |= ioread32(&hw->reg->INT_ST);
1360                         int_st = int_st & ioread32(&hw->reg->INT_EN);
1361                 }
1362         if (int_st & PCH_GBE_INT_RX_DMA_ERR)
1363                 adapter->stats.intr_rx_dma_err_count++;
1364         if (int_st & PCH_GBE_INT_TX_FIFO_ERR)
1365                 adapter->stats.intr_tx_fifo_err_count++;
1366         if (int_st & PCH_GBE_INT_TX_DMA_ERR)
1367                 adapter->stats.intr_tx_dma_err_count++;
1368         if (int_st & PCH_GBE_INT_TCPIP_ERR)
1369                 adapter->stats.intr_tcpip_err_count++;
1370         /* When Rx descriptor is empty  */
1371         if ((int_st & PCH_GBE_INT_RX_DSC_EMP)) {
1372                 adapter->stats.intr_rx_dsc_empty_count++;
1373                 netdev_dbg(netdev, "Rx descriptor is empty\n");
1374                 int_en = ioread32(&hw->reg->INT_EN);
1375                 iowrite32((int_en & ~PCH_GBE_INT_RX_DSC_EMP), &hw->reg->INT_EN);
1376                 if (hw->mac.tx_fc_enable) {
1377                         /* Set Pause packet */
1378                         pch_gbe_mac_set_pause_packet(hw);
1379                 }
1380         }
1381 
1382         /* When request status is Receive interruption */
1383         if ((int_st & (PCH_GBE_INT_RX_DMA_CMPLT | PCH_GBE_INT_TX_CMPLT)) ||
1384             (adapter->rx_stop_flag)) {
1385                 if (likely(napi_schedule_prep(&adapter->napi))) {
1386                         /* Enable only Rx Descriptor empty */
1387                         atomic_inc(&adapter->irq_sem);
1388                         int_en = ioread32(&hw->reg->INT_EN);
1389                         int_en &=
1390                             ~(PCH_GBE_INT_RX_DMA_CMPLT | PCH_GBE_INT_TX_CMPLT);
1391                         iowrite32(int_en, &hw->reg->INT_EN);
1392                         /* Start polling for NAPI */
1393                         __napi_schedule(&adapter->napi);
1394                 }
1395         }
1396         netdev_dbg(netdev, "return = 0x%08x  INT_EN reg = 0x%08x\n",
1397                    IRQ_HANDLED, ioread32(&hw->reg->INT_EN));
1398         return IRQ_HANDLED;
1399 }
1400 
1401 /**
1402  * pch_gbe_alloc_rx_buffers - Replace used receive buffers; legacy & extended
1403  * @adapter:       Board private structure
1404  * @rx_ring:       Rx descriptor ring
1405  * @cleaned_count: Cleaned count
1406  */
1407 static void
1408 pch_gbe_alloc_rx_buffers(struct pch_gbe_adapter *adapter,
1409                          struct pch_gbe_rx_ring *rx_ring, int cleaned_count)
1410 {
1411         struct net_device *netdev = adapter->netdev;
1412         struct pci_dev *pdev = adapter->pdev;
1413         struct pch_gbe_hw *hw = &adapter->hw;
1414         struct pch_gbe_rx_desc *rx_desc;
1415         struct pch_gbe_buffer *buffer_info;
1416         struct sk_buff *skb;
1417         unsigned int i;
1418         unsigned int bufsz;
1419 
1420         bufsz = adapter->rx_buffer_len + NET_IP_ALIGN;
1421         i = rx_ring->next_to_use;
1422 
1423         while ((cleaned_count--)) {
1424                 buffer_info = &rx_ring->buffer_info[i];
1425                 skb = netdev_alloc_skb(netdev, bufsz);
1426                 if (unlikely(!skb)) {
1427                         /* Better luck next round */
1428                         adapter->stats.rx_alloc_buff_failed++;
1429                         break;
1430                 }
1431                 /* align */
1432                 skb_reserve(skb, NET_IP_ALIGN);
1433                 buffer_info->skb = skb;
1434 
1435                 buffer_info->dma = dma_map_single(&pdev->dev,
1436                                                   buffer_info->rx_buffer,
1437                                                   buffer_info->length,
1438                                                   DMA_FROM_DEVICE);
1439                 if (dma_mapping_error(&adapter->pdev->dev, buffer_info->dma)) {
1440                         dev_kfree_skb(skb);
1441                         buffer_info->skb = NULL;
1442                         buffer_info->dma = 0;
1443                         adapter->stats.rx_alloc_buff_failed++;
1444                         break; /* while !buffer_info->skb */
1445                 }
1446                 buffer_info->mapped = true;
1447                 rx_desc = PCH_GBE_RX_DESC(*rx_ring, i);
1448                 rx_desc->buffer_addr = (buffer_info->dma);
1449                 rx_desc->gbec_status = DSC_INIT16;
1450 
1451                 netdev_dbg(netdev,
1452                            "i = %d  buffer_info->dma = 0x08%llx  buffer_info->length = 0x%x\n",
1453                            i, (unsigned long long)buffer_info->dma,
1454                            buffer_info->length);
1455 
1456                 if (unlikely(++i == rx_ring->count))
1457                         i = 0;
1458         }
1459         if (likely(rx_ring->next_to_use != i)) {
1460                 rx_ring->next_to_use = i;
1461                 if (unlikely(i-- == 0))
1462                         i = (rx_ring->count - 1);
1463                 iowrite32(rx_ring->dma +
1464                           (int)sizeof(struct pch_gbe_rx_desc) * i,
1465                           &hw->reg->RX_DSC_SW_P);
1466         }
1467         return;
1468 }
1469 
1470 static int
1471 pch_gbe_alloc_rx_buffers_pool(struct pch_gbe_adapter *adapter,
1472                          struct pch_gbe_rx_ring *rx_ring, int cleaned_count)
1473 {
1474         struct pci_dev *pdev = adapter->pdev;
1475         struct pch_gbe_buffer *buffer_info;
1476         unsigned int i;
1477         unsigned int bufsz;
1478         unsigned int size;
1479 
1480         bufsz = adapter->rx_buffer_len;
1481 
1482         size = rx_ring->count * bufsz + PCH_GBE_RESERVE_MEMORY;
1483         rx_ring->rx_buff_pool =
1484                 dma_zalloc_coherent(&pdev->dev, size,
1485                                     &rx_ring->rx_buff_pool_logic, GFP_KERNEL);
1486         if (!rx_ring->rx_buff_pool)
1487                 return -ENOMEM;
1488 
1489         rx_ring->rx_buff_pool_size = size;
1490         for (i = 0; i < rx_ring->count; i++) {
1491                 buffer_info = &rx_ring->buffer_info[i];
1492                 buffer_info->rx_buffer = rx_ring->rx_buff_pool + bufsz * i;
1493                 buffer_info->length = bufsz;
1494         }
1495         return 0;
1496 }
1497 
1498 /**
1499  * pch_gbe_alloc_tx_buffers - Allocate transmit buffers
1500  * @adapter:   Board private structure
1501  * @tx_ring:   Tx descriptor ring
1502  */
1503 static void pch_gbe_alloc_tx_buffers(struct pch_gbe_adapter *adapter,
1504                                         struct pch_gbe_tx_ring *tx_ring)
1505 {
1506         struct pch_gbe_buffer *buffer_info;
1507         struct sk_buff *skb;
1508         unsigned int i;
1509         unsigned int bufsz;
1510         struct pch_gbe_tx_desc *tx_desc;
1511 
1512         bufsz =
1513             adapter->hw.mac.max_frame_size + PCH_GBE_DMA_ALIGN + NET_IP_ALIGN;
1514 
1515         for (i = 0; i < tx_ring->count; i++) {
1516                 buffer_info = &tx_ring->buffer_info[i];
1517                 skb = netdev_alloc_skb(adapter->netdev, bufsz);
1518                 skb_reserve(skb, PCH_GBE_DMA_ALIGN);
1519                 buffer_info->skb = skb;
1520                 tx_desc = PCH_GBE_TX_DESC(*tx_ring, i);
1521                 tx_desc->gbec_status = (DSC_INIT16);
1522         }
1523         return;
1524 }
1525 
1526 /**
1527  * pch_gbe_clean_tx - Reclaim resources after transmit completes
1528  * @adapter:   Board private structure
1529  * @tx_ring:   Tx descriptor ring
1530  * Returns:
1531  *      true:  Cleaned the descriptor
1532  *      false: Not cleaned the descriptor
1533  */
1534 static bool
1535 pch_gbe_clean_tx(struct pch_gbe_adapter *adapter,
1536                  struct pch_gbe_tx_ring *tx_ring)
1537 {
1538         struct pch_gbe_tx_desc *tx_desc;
1539         struct pch_gbe_buffer *buffer_info;
1540         struct sk_buff *skb;
1541         unsigned int i;
1542         unsigned int cleaned_count = 0;
1543         bool cleaned = false;
1544         int unused, thresh;
1545 
1546         netdev_dbg(adapter->netdev, "next_to_clean : %d\n",
1547                    tx_ring->next_to_clean);
1548 
1549         i = tx_ring->next_to_clean;
1550         tx_desc = PCH_GBE_TX_DESC(*tx_ring, i);
1551         netdev_dbg(adapter->netdev, "gbec_status:0x%04x  dma_status:0x%04x\n",
1552                    tx_desc->gbec_status, tx_desc->dma_status);
1553 
1554         unused = PCH_GBE_DESC_UNUSED(tx_ring);
1555         thresh = tx_ring->count - PCH_GBE_TX_WEIGHT;
1556         if ((tx_desc->gbec_status == DSC_INIT16) && (unused < thresh))
1557         {  /* current marked clean, tx queue filling up, do extra clean */
1558                 int j, k;
1559                 if (unused < 8) {  /* tx queue nearly full */
1560                         netdev_dbg(adapter->netdev,
1561                                    "clean_tx: transmit queue warning (%x,%x) unused=%d\n",
1562                                    tx_ring->next_to_clean, tx_ring->next_to_use,
1563                                    unused);
1564                 }
1565 
1566                 /* current marked clean, scan for more that need cleaning. */
1567                 k = i;
1568                 for (j = 0; j < PCH_GBE_TX_WEIGHT; j++)
1569                 {
1570                         tx_desc = PCH_GBE_TX_DESC(*tx_ring, k);
1571                         if (tx_desc->gbec_status != DSC_INIT16) break; /*found*/
1572                         if (++k >= tx_ring->count) k = 0;  /*increment, wrap*/
1573                 }
1574                 if (j < PCH_GBE_TX_WEIGHT) {
1575                         netdev_dbg(adapter->netdev,
1576                                    "clean_tx: unused=%d loops=%d found tx_desc[%x,%x:%x].gbec_status=%04x\n",
1577                                    unused, j, i, k, tx_ring->next_to_use,
1578                                    tx_desc->gbec_status);
1579                         i = k;  /*found one to clean, usu gbec_status==2000.*/
1580                 }
1581         }
1582 
1583         while ((tx_desc->gbec_status & DSC_INIT16) == 0x0000) {
1584                 netdev_dbg(adapter->netdev, "gbec_status:0x%04x\n",
1585                            tx_desc->gbec_status);
1586                 buffer_info = &tx_ring->buffer_info[i];
1587                 skb = buffer_info->skb;
1588                 cleaned = true;
1589 
1590                 if ((tx_desc->gbec_status & PCH_GBE_TXD_GMAC_STAT_ABT)) {
1591                         adapter->stats.tx_aborted_errors++;
1592                         netdev_err(adapter->netdev, "Transfer Abort Error\n");
1593                 } else if ((tx_desc->gbec_status & PCH_GBE_TXD_GMAC_STAT_CRSER)
1594                           ) {
1595                         adapter->stats.tx_carrier_errors++;
1596                         netdev_err(adapter->netdev,
1597                                    "Transfer Carrier Sense Error\n");
1598                 } else if ((tx_desc->gbec_status & PCH_GBE_TXD_GMAC_STAT_EXCOL)
1599                           ) {
1600                         adapter->stats.tx_aborted_errors++;
1601                         netdev_err(adapter->netdev,
1602                                    "Transfer Collision Abort Error\n");
1603                 } else if ((tx_desc->gbec_status &
1604                             (PCH_GBE_TXD_GMAC_STAT_SNGCOL |
1605                              PCH_GBE_TXD_GMAC_STAT_MLTCOL))) {
1606                         adapter->stats.collisions++;
1607                         adapter->stats.tx_packets++;
1608                         adapter->stats.tx_bytes += skb->len;
1609                         netdev_dbg(adapter->netdev, "Transfer Collision\n");
1610                 } else if ((tx_desc->gbec_status & PCH_GBE_TXD_GMAC_STAT_CMPLT)
1611                           ) {
1612                         adapter->stats.tx_packets++;
1613                         adapter->stats.tx_bytes += skb->len;
1614                 }
1615                 if (buffer_info->mapped) {
1616                         netdev_dbg(adapter->netdev,
1617                                    "unmap buffer_info->dma : %d\n", i);
1618                         dma_unmap_single(&adapter->pdev->dev, buffer_info->dma,
1619                                          buffer_info->length, DMA_TO_DEVICE);
1620                         buffer_info->mapped = false;
1621                 }
1622                 if (buffer_info->skb) {
1623                         netdev_dbg(adapter->netdev,
1624                                    "trim buffer_info->skb : %d\n", i);
1625                         skb_trim(buffer_info->skb, 0);
1626                 }
1627                 tx_desc->gbec_status = DSC_INIT16;
1628                 if (unlikely(++i == tx_ring->count))
1629                         i = 0;
1630                 tx_desc = PCH_GBE_TX_DESC(*tx_ring, i);
1631 
1632                 /* weight of a sort for tx, to avoid endless transmit cleanup */
1633                 if (cleaned_count++ == PCH_GBE_TX_WEIGHT) {
1634                         cleaned = false;
1635                         break;
1636                 }
1637         }
1638         netdev_dbg(adapter->netdev,
1639                    "called pch_gbe_unmap_and_free_tx_resource() %d count\n",
1640                    cleaned_count);
1641         if (cleaned_count > 0)  { /*skip this if nothing cleaned*/
1642                 /* Recover from running out of Tx resources in xmit_frame */
1643                 spin_lock(&tx_ring->tx_lock);
1644                 if (unlikely(cleaned && (netif_queue_stopped(adapter->netdev))))
1645                 {
1646                         netif_wake_queue(adapter->netdev);
1647                         adapter->stats.tx_restart_count++;
1648                         netdev_dbg(adapter->netdev, "Tx wake queue\n");
1649                 }
1650 
1651                 tx_ring->next_to_clean = i;
1652 
1653                 netdev_dbg(adapter->netdev, "next_to_clean : %d\n",
1654                            tx_ring->next_to_clean);
1655                 spin_unlock(&tx_ring->tx_lock);
1656         }
1657         return cleaned;
1658 }
1659 
1660 /**
1661  * pch_gbe_clean_rx - Send received data up the network stack; legacy
1662  * @adapter:     Board private structure
1663  * @rx_ring:     Rx descriptor ring
1664  * @work_done:   Completed count
1665  * @work_to_do:  Request count
1666  * Returns:
1667  *      true:  Cleaned the descriptor
1668  *      false: Not cleaned the descriptor
1669  */
1670 static bool
1671 pch_gbe_clean_rx(struct pch_gbe_adapter *adapter,
1672                  struct pch_gbe_rx_ring *rx_ring,
1673                  int *work_done, int work_to_do)
1674 {
1675         struct net_device *netdev = adapter->netdev;
1676         struct pci_dev *pdev = adapter->pdev;
1677         struct pch_gbe_buffer *buffer_info;
1678         struct pch_gbe_rx_desc *rx_desc;
1679         u32 length;
1680         unsigned int i;
1681         unsigned int cleaned_count = 0;
1682         bool cleaned = false;
1683         struct sk_buff *skb;
1684         u8 dma_status;
1685         u16 gbec_status;
1686         u32 tcp_ip_status;
1687 
1688         i = rx_ring->next_to_clean;
1689 
1690         while (*work_done < work_to_do) {
1691                 /* Check Rx descriptor status */
1692                 rx_desc = PCH_GBE_RX_DESC(*rx_ring, i);
1693                 if (rx_desc->gbec_status == DSC_INIT16)
1694                         break;
1695                 cleaned = true;
1696                 cleaned_count++;
1697 
1698                 dma_status = rx_desc->dma_status;
1699                 gbec_status = rx_desc->gbec_status;
1700                 tcp_ip_status = rx_desc->tcp_ip_status;
1701                 rx_desc->gbec_status = DSC_INIT16;
1702                 buffer_info = &rx_ring->buffer_info[i];
1703                 skb = buffer_info->skb;
1704                 buffer_info->skb = NULL;
1705 
1706                 /* unmap dma */
1707                 dma_unmap_single(&pdev->dev, buffer_info->dma,
1708                                    buffer_info->length, DMA_FROM_DEVICE);
1709                 buffer_info->mapped = false;
1710 
1711                 netdev_dbg(netdev,
1712                            "RxDecNo = 0x%04x  Status[DMA:0x%02x GBE:0x%04x TCP:0x%08x]  BufInf = 0x%p\n",
1713                            i, dma_status, gbec_status, tcp_ip_status,
1714                            buffer_info);
1715                 /* Error check */
1716                 if (unlikely(gbec_status & PCH_GBE_RXD_GMAC_STAT_NOTOCTAL)) {
1717                         adapter->stats.rx_frame_errors++;
1718                         netdev_err(netdev, "Receive Not Octal Error\n");
1719                 } else if (unlikely(gbec_status &
1720                                 PCH_GBE_RXD_GMAC_STAT_NBLERR)) {
1721                         adapter->stats.rx_frame_errors++;
1722                         netdev_err(netdev, "Receive Nibble Error\n");
1723                 } else if (unlikely(gbec_status &
1724                                 PCH_GBE_RXD_GMAC_STAT_CRCERR)) {
1725                         adapter->stats.rx_crc_errors++;
1726                         netdev_err(netdev, "Receive CRC Error\n");
1727                 } else {
1728                         /* get receive length */
1729                         /* length convert[-3], length includes FCS length */
1730                         length = (rx_desc->rx_words_eob) - 3 - ETH_FCS_LEN;
1731                         if (rx_desc->rx_words_eob & 0x02)
1732                                 length = length - 4;
1733                         /*
1734                          * buffer_info->rx_buffer: [Header:14][payload]
1735                          * skb->data: [Reserve:2][Header:14][payload]
1736                          */
1737                         memcpy(skb->data, buffer_info->rx_buffer, length);
1738 
1739                         /* update status of driver */
1740                         adapter->stats.rx_bytes += length;
1741                         adapter->stats.rx_packets++;
1742                         if ((gbec_status & PCH_GBE_RXD_GMAC_STAT_MARMLT))
1743                                 adapter->stats.multicast++;
1744                         /* Write meta date of skb */
1745                         skb_put(skb, length);
1746 
1747                         pch_rx_timestamp(adapter, skb);
1748 
1749                         skb->protocol = eth_type_trans(skb, netdev);
1750                         if (tcp_ip_status & PCH_GBE_RXD_ACC_STAT_TCPIPOK)
1751                                 skb->ip_summed = CHECKSUM_UNNECESSARY;
1752                         else
1753                                 skb->ip_summed = CHECKSUM_NONE;
1754 
1755                         napi_gro_receive(&adapter->napi, skb);
1756                         (*work_done)++;
1757                         netdev_dbg(netdev,
1758                                    "Receive skb->ip_summed: %d length: %d\n",
1759                                    skb->ip_summed, length);
1760                 }
1761                 /* return some buffers to hardware, one at a time is too slow */
1762                 if (unlikely(cleaned_count >= PCH_GBE_RX_BUFFER_WRITE)) {
1763                         pch_gbe_alloc_rx_buffers(adapter, rx_ring,
1764                                                  cleaned_count);
1765                         cleaned_count = 0;
1766                 }
1767                 if (++i == rx_ring->count)
1768                         i = 0;
1769         }
1770         rx_ring->next_to_clean = i;
1771         if (cleaned_count)
1772                 pch_gbe_alloc_rx_buffers(adapter, rx_ring, cleaned_count);
1773         return cleaned;
1774 }
1775 
1776 /**
1777  * pch_gbe_setup_tx_resources - Allocate Tx resources (Descriptors)
1778  * @adapter:  Board private structure
1779  * @tx_ring:  Tx descriptor ring (for a specific queue) to setup
1780  * Returns:
1781  *      0:              Successfully
1782  *      Negative value: Failed
1783  */
1784 int pch_gbe_setup_tx_resources(struct pch_gbe_adapter *adapter,
1785                                 struct pch_gbe_tx_ring *tx_ring)
1786 {
1787         struct pci_dev *pdev = adapter->pdev;
1788         struct pch_gbe_tx_desc *tx_desc;
1789         int size;
1790         int desNo;
1791 
1792         size = (int)sizeof(struct pch_gbe_buffer) * tx_ring->count;
1793         tx_ring->buffer_info = vzalloc(size);
1794         if (!tx_ring->buffer_info)
1795                 return -ENOMEM;
1796 
1797         tx_ring->size = tx_ring->count * (int)sizeof(struct pch_gbe_tx_desc);
1798 
1799         tx_ring->desc = dma_zalloc_coherent(&pdev->dev, tx_ring->size,
1800                                             &tx_ring->dma, GFP_KERNEL);
1801         if (!tx_ring->desc) {
1802                 vfree(tx_ring->buffer_info);
1803                 return -ENOMEM;
1804         }
1805 
1806         tx_ring->next_to_use = 0;
1807         tx_ring->next_to_clean = 0;
1808         spin_lock_init(&tx_ring->tx_lock);
1809 
1810         for (desNo = 0; desNo < tx_ring->count; desNo++) {
1811                 tx_desc = PCH_GBE_TX_DESC(*tx_ring, desNo);
1812                 tx_desc->gbec_status = DSC_INIT16;
1813         }
1814         netdev_dbg(adapter->netdev,
1815                    "tx_ring->desc = 0x%p  tx_ring->dma = 0x%08llx next_to_clean = 0x%08x  next_to_use = 0x%08x\n",
1816                    tx_ring->desc, (unsigned long long)tx_ring->dma,
1817                    tx_ring->next_to_clean, tx_ring->next_to_use);
1818         return 0;
1819 }
1820 
1821 /**
1822  * pch_gbe_setup_rx_resources - Allocate Rx resources (Descriptors)
1823  * @adapter:  Board private structure
1824  * @rx_ring:  Rx descriptor ring (for a specific queue) to setup
1825  * Returns:
1826  *      0:              Successfully
1827  *      Negative value: Failed
1828  */
1829 int pch_gbe_setup_rx_resources(struct pch_gbe_adapter *adapter,
1830                                 struct pch_gbe_rx_ring *rx_ring)
1831 {
1832         struct pci_dev *pdev = adapter->pdev;
1833         struct pch_gbe_rx_desc *rx_desc;
1834         int size;
1835         int desNo;
1836 
1837         size = (int)sizeof(struct pch_gbe_buffer) * rx_ring->count;
1838         rx_ring->buffer_info = vzalloc(size);
1839         if (!rx_ring->buffer_info)
1840                 return -ENOMEM;
1841 
1842         rx_ring->size = rx_ring->count * (int)sizeof(struct pch_gbe_rx_desc);
1843         rx_ring->desc = dma_zalloc_coherent(&pdev->dev, rx_ring->size,
1844                                             &rx_ring->dma, GFP_KERNEL);
1845         if (!rx_ring->desc) {
1846                 vfree(rx_ring->buffer_info);
1847                 return -ENOMEM;
1848         }
1849         rx_ring->next_to_clean = 0;
1850         rx_ring->next_to_use = 0;
1851         for (desNo = 0; desNo < rx_ring->count; desNo++) {
1852                 rx_desc = PCH_GBE_RX_DESC(*rx_ring, desNo);
1853                 rx_desc->gbec_status = DSC_INIT16;
1854         }
1855         netdev_dbg(adapter->netdev,
1856                    "rx_ring->desc = 0x%p  rx_ring->dma = 0x%08llx next_to_clean = 0x%08x  next_to_use = 0x%08x\n",
1857                    rx_ring->desc, (unsigned long long)rx_ring->dma,
1858                    rx_ring->next_to_clean, rx_ring->next_to_use);
1859         return 0;
1860 }
1861 
1862 /**
1863  * pch_gbe_free_tx_resources - Free Tx Resources
1864  * @adapter:  Board private structure
1865  * @tx_ring:  Tx descriptor ring for a specific queue
1866  */
1867 void pch_gbe_free_tx_resources(struct pch_gbe_adapter *adapter,
1868                                 struct pch_gbe_tx_ring *tx_ring)
1869 {
1870         struct pci_dev *pdev = adapter->pdev;
1871 
1872         pch_gbe_clean_tx_ring(adapter, tx_ring);
1873         vfree(tx_ring->buffer_info);
1874         tx_ring->buffer_info = NULL;
1875         pci_free_consistent(pdev, tx_ring->size, tx_ring->desc, tx_ring->dma);
1876         tx_ring->desc = NULL;
1877 }
1878 
1879 /**
1880  * pch_gbe_free_rx_resources - Free Rx Resources
1881  * @adapter:  Board private structure
1882  * @rx_ring:  Ring to clean the resources from
1883  */
1884 void pch_gbe_free_rx_resources(struct pch_gbe_adapter *adapter,
1885                                 struct pch_gbe_rx_ring *rx_ring)
1886 {
1887         struct pci_dev *pdev = adapter->pdev;
1888 
1889         pch_gbe_clean_rx_ring(adapter, rx_ring);
1890         vfree(rx_ring->buffer_info);
1891         rx_ring->buffer_info = NULL;
1892         pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma);
1893         rx_ring->desc = NULL;
1894 }
1895 
1896 /**
1897  * pch_gbe_request_irq - Allocate an interrupt line
1898  * @adapter:  Board private structure
1899  * Returns:
1900  *      0:              Successfully
1901  *      Negative value: Failed
1902  */
1903 static int pch_gbe_request_irq(struct pch_gbe_adapter *adapter)
1904 {
1905         struct net_device *netdev = adapter->netdev;
1906         int err;
1907         int flags;
1908 
1909         flags = IRQF_SHARED;
1910         adapter->have_msi = false;
1911         err = pci_enable_msi(adapter->pdev);
1912         netdev_dbg(netdev, "call pci_enable_msi\n");
1913         if (err) {
1914                 netdev_dbg(netdev, "call pci_enable_msi - Error: %d\n", err);
1915         } else {
1916                 flags = 0;
1917                 adapter->have_msi = true;
1918         }
1919         err = request_irq(adapter->pdev->irq, &pch_gbe_intr,
1920                           flags, netdev->name, netdev);
1921         if (err)
1922                 netdev_err(netdev, "Unable to allocate interrupt Error: %d\n",
1923                            err);
1924         netdev_dbg(netdev,
1925                    "adapter->have_msi : %d  flags : 0x%04x  return : 0x%04x\n",
1926                    adapter->have_msi, flags, err);
1927         return err;
1928 }
1929 
1930 
1931 /**
1932  * pch_gbe_up - Up GbE network device
1933  * @adapter:  Board private structure
1934  * Returns:
1935  *      0:              Successfully
1936  *      Negative value: Failed
1937  */
1938 int pch_gbe_up(struct pch_gbe_adapter *adapter)
1939 {
1940         struct net_device *netdev = adapter->netdev;
1941         struct pch_gbe_tx_ring *tx_ring = adapter->tx_ring;
1942         struct pch_gbe_rx_ring *rx_ring = adapter->rx_ring;
1943         int err = -EINVAL;
1944 
1945         /* Ensure we have a valid MAC */
1946         if (!is_valid_ether_addr(adapter->hw.mac.addr)) {
1947                 netdev_err(netdev, "Error: Invalid MAC address\n");
1948                 goto out;
1949         }
1950 
1951         /* hardware has been reset, we need to reload some things */
1952         pch_gbe_set_multi(netdev);
1953 
1954         pch_gbe_setup_tctl(adapter);
1955         pch_gbe_configure_tx(adapter);
1956         pch_gbe_setup_rctl(adapter);
1957         pch_gbe_configure_rx(adapter);
1958 
1959         err = pch_gbe_request_irq(adapter);
1960         if (err) {
1961                 netdev_err(netdev,
1962                            "Error: can't bring device up - irq request failed\n");
1963                 goto out;
1964         }
1965         err = pch_gbe_alloc_rx_buffers_pool(adapter, rx_ring, rx_ring->count);
1966         if (err) {
1967                 netdev_err(netdev,
1968                            "Error: can't bring device up - alloc rx buffers pool failed\n");
1969                 goto freeirq;
1970         }
1971         pch_gbe_alloc_tx_buffers(adapter, tx_ring);
1972         pch_gbe_alloc_rx_buffers(adapter, rx_ring, rx_ring->count);
1973         adapter->tx_queue_len = netdev->tx_queue_len;
1974         pch_gbe_enable_dma_rx(&adapter->hw);
1975         pch_gbe_enable_mac_rx(&adapter->hw);
1976 
1977         mod_timer(&adapter->watchdog_timer, jiffies);
1978 
1979         napi_enable(&adapter->napi);
1980         pch_gbe_irq_enable(adapter);
1981         netif_start_queue(adapter->netdev);
1982 
1983         return 0;
1984 
1985 freeirq:
1986         pch_gbe_free_irq(adapter);
1987 out:
1988         return err;
1989 }
1990 
1991 /**
1992  * pch_gbe_down - Down GbE network device
1993  * @adapter:  Board private structure
1994  */
1995 void pch_gbe_down(struct pch_gbe_adapter *adapter)
1996 {
1997         struct net_device *netdev = adapter->netdev;
1998         struct pci_dev *pdev = adapter->pdev;
1999         struct pch_gbe_rx_ring *rx_ring = adapter->rx_ring;
2000 
2001         /* signal that we're down so the interrupt handler does not
2002          * reschedule our watchdog timer */
2003         napi_disable(&adapter->napi);
2004         atomic_set(&adapter->irq_sem, 0);
2005 
2006         pch_gbe_irq_disable(adapter);
2007         pch_gbe_free_irq(adapter);
2008 
2009         del_timer_sync(&adapter->watchdog_timer);
2010 
2011         netdev->tx_queue_len = adapter->tx_queue_len;
2012         netif_carrier_off(netdev);
2013         netif_stop_queue(netdev);
2014 
2015         if ((pdev->error_state) && (pdev->error_state != pci_channel_io_normal))
2016                 pch_gbe_reset(adapter);
2017         pch_gbe_clean_tx_ring(adapter, adapter->tx_ring);
2018         pch_gbe_clean_rx_ring(adapter, adapter->rx_ring);
2019 
2020         pci_free_consistent(adapter->pdev, rx_ring->rx_buff_pool_size,
2021                             rx_ring->rx_buff_pool, rx_ring->rx_buff_pool_logic);
2022         rx_ring->rx_buff_pool_logic = 0;
2023         rx_ring->rx_buff_pool_size = 0;
2024         rx_ring->rx_buff_pool = NULL;
2025 }
2026 
2027 /**
2028  * pch_gbe_sw_init - Initialize general software structures (struct pch_gbe_adapter)
2029  * @adapter:  Board private structure to initialize
2030  * Returns:
2031  *      0:              Successfully
2032  *      Negative value: Failed
2033  */
2034 static int pch_gbe_sw_init(struct pch_gbe_adapter *adapter)
2035 {
2036         struct pch_gbe_hw *hw = &adapter->hw;
2037         struct net_device *netdev = adapter->netdev;
2038 
2039         adapter->rx_buffer_len = PCH_GBE_FRAME_SIZE_2048;
2040         hw->mac.max_frame_size = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
2041         hw->mac.min_frame_size = ETH_ZLEN + ETH_FCS_LEN;
2042 
2043         /* Initialize the hardware-specific values */
2044         if (pch_gbe_hal_setup_init_funcs(hw)) {
2045                 netdev_err(netdev, "Hardware Initialization Failure\n");
2046                 return -EIO;
2047         }
2048         if (pch_gbe_alloc_queues(adapter)) {
2049                 netdev_err(netdev, "Unable to allocate memory for queues\n");
2050                 return -ENOMEM;
2051         }
2052         spin_lock_init(&adapter->hw.miim_lock);
2053         spin_lock_init(&adapter->stats_lock);
2054         spin_lock_init(&adapter->ethtool_lock);
2055         atomic_set(&adapter->irq_sem, 0);
2056         pch_gbe_irq_disable(adapter);
2057 
2058         pch_gbe_init_stats(adapter);
2059 
2060         netdev_dbg(netdev,
2061                    "rx_buffer_len : %d  mac.min_frame_size : %d  mac.max_frame_size : %d\n",
2062                    (u32) adapter->rx_buffer_len,
2063                    hw->mac.min_frame_size, hw->mac.max_frame_size);
2064         return 0;
2065 }
2066 
2067 /**
2068  * pch_gbe_open - Called when a network interface is made active
2069  * @netdev:     Network interface device structure
2070  * Returns:
2071  *      0:              Successfully
2072  *      Negative value: Failed
2073  */
2074 static int pch_gbe_open(struct net_device *netdev)
2075 {
2076         struct pch_gbe_adapter *adapter = netdev_priv(netdev);
2077         struct pch_gbe_hw *hw = &adapter->hw;
2078         int err;
2079 
2080         /* allocate transmit descriptors */
2081         err = pch_gbe_setup_tx_resources(adapter, adapter->tx_ring);
2082         if (err)
2083                 goto err_setup_tx;
2084         /* allocate receive descriptors */
2085         err = pch_gbe_setup_rx_resources(adapter, adapter->rx_ring);
2086         if (err)
2087                 goto err_setup_rx;
2088         pch_gbe_hal_power_up_phy(hw);
2089         err = pch_gbe_up(adapter);
2090         if (err)
2091                 goto err_up;
2092         netdev_dbg(netdev, "Success End\n");
2093         return 0;
2094 
2095 err_up:
2096         if (!adapter->wake_up_evt)
2097                 pch_gbe_hal_power_down_phy(hw);
2098         pch_gbe_free_rx_resources(adapter, adapter->rx_ring);
2099 err_setup_rx:
2100         pch_gbe_free_tx_resources(adapter, adapter->tx_ring);
2101 err_setup_tx:
2102         pch_gbe_reset(adapter);
2103         netdev_err(netdev, "Error End\n");
2104         return err;
2105 }
2106 
2107 /**
2108  * pch_gbe_stop - Disables a network interface
2109  * @netdev:  Network interface device structure
2110  * Returns:
2111  *      0: Successfully
2112  */
2113 static int pch_gbe_stop(struct net_device *netdev)
2114 {
2115         struct pch_gbe_adapter *adapter = netdev_priv(netdev);
2116         struct pch_gbe_hw *hw = &adapter->hw;
2117 
2118         pch_gbe_down(adapter);
2119         if (!adapter->wake_up_evt)
2120                 pch_gbe_hal_power_down_phy(hw);
2121         pch_gbe_free_tx_resources(adapter, adapter->tx_ring);
2122         pch_gbe_free_rx_resources(adapter, adapter->rx_ring);
2123         return 0;
2124 }
2125 
2126 /**
2127  * pch_gbe_xmit_frame - Packet transmitting start
2128  * @skb:     Socket buffer structure
2129  * @netdev:  Network interface device structure
2130  * Returns:
2131  *      - NETDEV_TX_OK:   Normal end
2132  *      - NETDEV_TX_BUSY: Error end
2133  */
2134 static int pch_gbe_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
2135 {
2136         struct pch_gbe_adapter *adapter = netdev_priv(netdev);
2137         struct pch_gbe_tx_ring *tx_ring = adapter->tx_ring;
2138         unsigned long flags;
2139 
2140         if (!spin_trylock_irqsave(&tx_ring->tx_lock, flags)) {
2141                 /* Collision - tell upper layer to requeue */
2142                 return NETDEV_TX_LOCKED;
2143         }
2144         if (unlikely(!PCH_GBE_DESC_UNUSED(tx_ring))) {
2145                 netif_stop_queue(netdev);
2146                 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
2147                 netdev_dbg(netdev,
2148                            "Return : BUSY  next_to use : 0x%08x  next_to clean : 0x%08x\n",
2149                            tx_ring->next_to_use, tx_ring->next_to_clean);
2150                 return NETDEV_TX_BUSY;
2151         }
2152 
2153         /* CRC,ITAG no support */
2154         pch_gbe_tx_queue(adapter, tx_ring, skb);
2155         spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
2156         return NETDEV_TX_OK;
2157 }
2158 
2159 /**
2160  * pch_gbe_get_stats - Get System Network Statistics
2161  * @netdev:  Network interface device structure
2162  * Returns:  The current stats
2163  */
2164 static struct net_device_stats *pch_gbe_get_stats(struct net_device *netdev)
2165 {
2166         /* only return the current stats */
2167         return &netdev->stats;
2168 }
2169 
2170 /**
2171  * pch_gbe_set_multi - Multicast and Promiscuous mode set
2172  * @netdev:   Network interface device structure
2173  */
2174 static void pch_gbe_set_multi(struct net_device *netdev)
2175 {
2176         struct pch_gbe_adapter *adapter = netdev_priv(netdev);
2177         struct pch_gbe_hw *hw = &adapter->hw;
2178         struct netdev_hw_addr *ha;
2179         u8 *mta_list;
2180         u32 rctl;
2181         int i;
2182         int mc_count;
2183 
2184         netdev_dbg(netdev, "netdev->flags : 0x%08x\n", netdev->flags);
2185 
2186         /* Check for Promiscuous and All Multicast modes */
2187         rctl = ioread32(&hw->reg->RX_MODE);
2188         mc_count = netdev_mc_count(netdev);
2189         if ((netdev->flags & IFF_PROMISC)) {
2190                 rctl &= ~PCH_GBE_ADD_FIL_EN;
2191                 rctl &= ~PCH_GBE_MLT_FIL_EN;
2192         } else if ((netdev->flags & IFF_ALLMULTI)) {
2193                 /* all the multicasting receive permissions */
2194                 rctl |= PCH_GBE_ADD_FIL_EN;
2195                 rctl &= ~PCH_GBE_MLT_FIL_EN;
2196         } else {
2197                 if (mc_count >= PCH_GBE_MAR_ENTRIES) {
2198                         /* all the multicasting receive permissions */
2199                         rctl |= PCH_GBE_ADD_FIL_EN;
2200                         rctl &= ~PCH_GBE_MLT_FIL_EN;
2201                 } else {
2202                         rctl |= (PCH_GBE_ADD_FIL_EN | PCH_GBE_MLT_FIL_EN);
2203                 }
2204         }
2205         iowrite32(rctl, &hw->reg->RX_MODE);
2206 
2207         if (mc_count >= PCH_GBE_MAR_ENTRIES)
2208                 return;
2209         mta_list = kmalloc(mc_count * ETH_ALEN, GFP_ATOMIC);
2210         if (!mta_list)
2211                 return;
2212 
2213         /* The shared function expects a packed array of only addresses. */
2214         i = 0;
2215         netdev_for_each_mc_addr(ha, netdev) {
2216                 if (i == mc_count)
2217                         break;
2218                 memcpy(mta_list + (i++ * ETH_ALEN), &ha->addr, ETH_ALEN);
2219         }
2220         pch_gbe_mac_mc_addr_list_update(hw, mta_list, i, 1,
2221                                         PCH_GBE_MAR_ENTRIES);
2222         kfree(mta_list);
2223 
2224         netdev_dbg(netdev,
2225                  "RX_MODE reg(check bit31,30 ADD,MLT) : 0x%08x  netdev->mc_count : 0x%08x\n",
2226                  ioread32(&hw->reg->RX_MODE), mc_count);
2227 }
2228 
2229 /**
2230  * pch_gbe_set_mac - Change the Ethernet Address of the NIC
2231  * @netdev: Network interface device structure
2232  * @addr:   Pointer to an address structure
2233  * Returns:
2234  *      0:              Successfully
2235  *      -EADDRNOTAVAIL: Failed
2236  */
2237 static int pch_gbe_set_mac(struct net_device *netdev, void *addr)
2238 {
2239         struct pch_gbe_adapter *adapter = netdev_priv(netdev);
2240         struct sockaddr *skaddr = addr;
2241         int ret_val;
2242 
2243         if (!is_valid_ether_addr(skaddr->sa_data)) {
2244                 ret_val = -EADDRNOTAVAIL;
2245         } else {
2246                 memcpy(netdev->dev_addr, skaddr->sa_data, netdev->addr_len);
2247                 memcpy(adapter->hw.mac.addr, skaddr->sa_data, netdev->addr_len);
2248                 pch_gbe_mac_mar_set(&adapter->hw, adapter->hw.mac.addr, 0);
2249                 ret_val = 0;
2250         }
2251         netdev_dbg(netdev, "ret_val : 0x%08x\n", ret_val);
2252         netdev_dbg(netdev, "dev_addr : %pM\n", netdev->dev_addr);
2253         netdev_dbg(netdev, "mac_addr : %pM\n", adapter->hw.mac.addr);
2254         netdev_dbg(netdev, "MAC_ADR1AB reg : 0x%08x 0x%08x\n",
2255                    ioread32(&adapter->hw.reg->mac_adr[0].high),
2256                    ioread32(&adapter->hw.reg->mac_adr[0].low));
2257         return ret_val;
2258 }
2259 
2260 /**
2261  * pch_gbe_change_mtu - Change the Maximum Transfer Unit
2262  * @netdev:   Network interface device structure
2263  * @new_mtu:  New value for maximum frame size
2264  * Returns:
2265  *      0:              Successfully
2266  *      -EINVAL:        Failed
2267  */
2268 static int pch_gbe_change_mtu(struct net_device *netdev, int new_mtu)
2269 {
2270         struct pch_gbe_adapter *adapter = netdev_priv(netdev);
2271         int max_frame;
2272         unsigned long old_rx_buffer_len = adapter->rx_buffer_len;
2273         int err;
2274 
2275         max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
2276         if ((max_frame < ETH_ZLEN + ETH_FCS_LEN) ||
2277                 (max_frame > PCH_GBE_MAX_JUMBO_FRAME_SIZE)) {
2278                 netdev_err(netdev, "Invalid MTU setting\n");
2279                 return -EINVAL;
2280         }
2281         if (max_frame <= PCH_GBE_FRAME_SIZE_2048)
2282                 adapter->rx_buffer_len = PCH_GBE_FRAME_SIZE_2048;
2283         else if (max_frame <= PCH_GBE_FRAME_SIZE_4096)
2284                 adapter->rx_buffer_len = PCH_GBE_FRAME_SIZE_4096;
2285         else if (max_frame <= PCH_GBE_FRAME_SIZE_8192)
2286                 adapter->rx_buffer_len = PCH_GBE_FRAME_SIZE_8192;
2287         else
2288                 adapter->rx_buffer_len = PCH_GBE_MAX_RX_BUFFER_SIZE;
2289 
2290         if (netif_running(netdev)) {
2291                 pch_gbe_down(adapter);
2292                 err = pch_gbe_up(adapter);
2293                 if (err) {
2294                         adapter->rx_buffer_len = old_rx_buffer_len;
2295                         pch_gbe_up(adapter);
2296                         return err;
2297                 } else {
2298                         netdev->mtu = new_mtu;
2299                         adapter->hw.mac.max_frame_size = max_frame;
2300                 }
2301         } else {
2302                 pch_gbe_reset(adapter);
2303                 netdev->mtu = new_mtu;
2304                 adapter->hw.mac.max_frame_size = max_frame;
2305         }
2306 
2307         netdev_dbg(netdev,
2308                    "max_frame : %d  rx_buffer_len : %d  mtu : %d  max_frame_size : %d\n",
2309                    max_frame, (u32) adapter->rx_buffer_len, netdev->mtu,
2310                    adapter->hw.mac.max_frame_size);
2311         return 0;
2312 }
2313 
2314 /**
2315  * pch_gbe_set_features - Reset device after features changed
2316  * @netdev:   Network interface device structure
2317  * @features:  New features
2318  * Returns:
2319  *      0:              HW state updated successfully
2320  */
2321 static int pch_gbe_set_features(struct net_device *netdev,
2322         netdev_features_t features)
2323 {
2324         struct pch_gbe_adapter *adapter = netdev_priv(netdev);
2325         netdev_features_t changed = features ^ netdev->features;
2326 
2327         if (!(changed & NETIF_F_RXCSUM))
2328                 return 0;
2329 
2330         if (netif_running(netdev))
2331                 pch_gbe_reinit_locked(adapter);
2332         else
2333                 pch_gbe_reset(adapter);
2334 
2335         return 0;
2336 }
2337 
2338 /**
2339  * pch_gbe_ioctl - Controls register through a MII interface
2340  * @netdev:   Network interface device structure
2341  * @ifr:      Pointer to ifr structure
2342  * @cmd:      Control command
2343  * Returns:
2344  *      0:      Successfully
2345  *      Negative value: Failed
2346  */
2347 static int pch_gbe_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
2348 {
2349         struct pch_gbe_adapter *adapter = netdev_priv(netdev);
2350 
2351         netdev_dbg(netdev, "cmd : 0x%04x\n", cmd);
2352 
2353         if (cmd == SIOCSHWTSTAMP)
2354                 return hwtstamp_ioctl(netdev, ifr, cmd);
2355 
2356         return generic_mii_ioctl(&adapter->mii, if_mii(ifr), cmd, NULL);
2357 }
2358 
2359 /**
2360  * pch_gbe_tx_timeout - Respond to a Tx Hang
2361  * @netdev:   Network interface device structure
2362  */
2363 static void pch_gbe_tx_timeout(struct net_device *netdev)
2364 {
2365         struct pch_gbe_adapter *adapter = netdev_priv(netdev);
2366 
2367         /* Do the reset outside of interrupt context */
2368         adapter->stats.tx_timeout_count++;
2369         schedule_work(&adapter->reset_task);
2370 }
2371 
2372 /**
2373  * pch_gbe_napi_poll - NAPI receive and transfer polling callback
2374  * @napi:    Pointer of polling device struct
2375  * @budget:  The maximum number of a packet
2376  * Returns:
2377  *      false:  Exit the polling mode
2378  *      true:   Continue the polling mode
2379  */
2380 static int pch_gbe_napi_poll(struct napi_struct *napi, int budget)
2381 {
2382         struct pch_gbe_adapter *adapter =
2383             container_of(napi, struct pch_gbe_adapter, napi);
2384         int work_done = 0;
2385         bool poll_end_flag = false;
2386         bool cleaned = false;
2387 
2388         netdev_dbg(adapter->netdev, "budget : %d\n", budget);
2389 
2390         pch_gbe_clean_rx(adapter, adapter->rx_ring, &work_done, budget);
2391         cleaned = pch_gbe_clean_tx(adapter, adapter->tx_ring);
2392 
2393         if (cleaned)
2394                 work_done = budget;
2395         /* If no Tx and not enough Rx work done,
2396          * exit the polling mode
2397          */
2398         if (work_done < budget)
2399                 poll_end_flag = true;
2400 
2401         if (poll_end_flag) {
2402                 napi_complete(napi);
2403                 pch_gbe_irq_enable(adapter);
2404         }
2405 
2406         if (adapter->rx_stop_flag) {
2407                 adapter->rx_stop_flag = false;
2408                 pch_gbe_enable_dma_rx(&adapter->hw);
2409         }
2410 
2411         netdev_dbg(adapter->netdev,
2412                    "poll_end_flag : %d  work_done : %d  budget : %d\n",
2413                    poll_end_flag, work_done, budget);
2414 
2415         return work_done;
2416 }
2417 
2418 #ifdef CONFIG_NET_POLL_CONTROLLER
2419 /**
2420  * pch_gbe_netpoll - Used by things like netconsole to send skbs
2421  * @netdev:  Network interface device structure
2422  */
2423 static void pch_gbe_netpoll(struct net_device *netdev)
2424 {
2425         struct pch_gbe_adapter *adapter = netdev_priv(netdev);
2426 
2427         disable_irq(adapter->pdev->irq);
2428         pch_gbe_intr(adapter->pdev->irq, netdev);
2429         enable_irq(adapter->pdev->irq);
2430 }
2431 #endif
2432 
2433 static const struct net_device_ops pch_gbe_netdev_ops = {
2434         .ndo_open = pch_gbe_open,
2435         .ndo_stop = pch_gbe_stop,
2436         .ndo_start_xmit = pch_gbe_xmit_frame,
2437         .ndo_get_stats = pch_gbe_get_stats,
2438         .ndo_set_mac_address = pch_gbe_set_mac,
2439         .ndo_tx_timeout = pch_gbe_tx_timeout,
2440         .ndo_change_mtu = pch_gbe_change_mtu,
2441         .ndo_set_features = pch_gbe_set_features,
2442         .ndo_do_ioctl = pch_gbe_ioctl,
2443         .ndo_set_rx_mode = pch_gbe_set_multi,
2444 #ifdef CONFIG_NET_POLL_CONTROLLER
2445         .ndo_poll_controller = pch_gbe_netpoll,
2446 #endif
2447 };
2448 
2449 static pci_ers_result_t pch_gbe_io_error_detected(struct pci_dev *pdev,
2450                                                 pci_channel_state_t state)
2451 {
2452         struct net_device *netdev = pci_get_drvdata(pdev);
2453         struct pch_gbe_adapter *adapter = netdev_priv(netdev);
2454 
2455         netif_device_detach(netdev);
2456         if (netif_running(netdev))
2457                 pch_gbe_down(adapter);
2458         pci_disable_device(pdev);
2459         /* Request a slot slot reset. */
2460         return PCI_ERS_RESULT_NEED_RESET;
2461 }
2462 
2463 static pci_ers_result_t pch_gbe_io_slot_reset(struct pci_dev *pdev)
2464 {
2465         struct net_device *netdev = pci_get_drvdata(pdev);
2466         struct pch_gbe_adapter *adapter = netdev_priv(netdev);
2467         struct pch_gbe_hw *hw = &adapter->hw;
2468 
2469         if (pci_enable_device(pdev)) {
2470                 netdev_err(netdev, "Cannot re-enable PCI device after reset\n");
2471                 return PCI_ERS_RESULT_DISCONNECT;
2472         }
2473         pci_set_master(pdev);
2474         pci_enable_wake(pdev, PCI_D0, 0);
2475         pch_gbe_hal_power_up_phy(hw);
2476         pch_gbe_reset(adapter);
2477         /* Clear wake up status */
2478         pch_gbe_mac_set_wol_event(hw, 0);
2479 
2480         return PCI_ERS_RESULT_RECOVERED;
2481 }
2482 
2483 static void pch_gbe_io_resume(struct pci_dev *pdev)
2484 {
2485         struct net_device *netdev = pci_get_drvdata(pdev);
2486         struct pch_gbe_adapter *adapter = netdev_priv(netdev);
2487 
2488         if (netif_running(netdev)) {
2489                 if (pch_gbe_up(adapter)) {
2490                         netdev_dbg(netdev,
2491                                    "can't bring device back up after reset\n");
2492                         return;
2493                 }
2494         }
2495         netif_device_attach(netdev);
2496 }
2497 
2498 static int __pch_gbe_suspend(struct pci_dev *pdev)
2499 {
2500         struct net_device *netdev = pci_get_drvdata(pdev);
2501         struct pch_gbe_adapter *adapter = netdev_priv(netdev);
2502         struct pch_gbe_hw *hw = &adapter->hw;
2503         u32 wufc = adapter->wake_up_evt;
2504         int retval = 0;
2505 
2506         netif_device_detach(netdev);
2507         if (netif_running(netdev))
2508                 pch_gbe_down(adapter);
2509         if (wufc) {
2510                 pch_gbe_set_multi(netdev);
2511                 pch_gbe_setup_rctl(adapter);
2512                 pch_gbe_configure_rx(adapter);
2513                 pch_gbe_set_rgmii_ctrl(adapter, hw->mac.link_speed,
2514                                         hw->mac.link_duplex);
2515                 pch_gbe_set_mode(adapter, hw->mac.link_speed,
2516                                         hw->mac.link_duplex);
2517                 pch_gbe_mac_set_wol_event(hw, wufc);
2518                 pci_disable_device(pdev);
2519         } else {
2520                 pch_gbe_hal_power_down_phy(hw);
2521                 pch_gbe_mac_set_wol_event(hw, wufc);
2522                 pci_disable_device(pdev);
2523         }
2524         return retval;
2525 }
2526 
2527 #ifdef CONFIG_PM
2528 static int pch_gbe_suspend(struct device *device)
2529 {
2530         struct pci_dev *pdev = to_pci_dev(device);
2531 
2532         return __pch_gbe_suspend(pdev);
2533 }
2534 
2535 static int pch_gbe_resume(struct device *device)
2536 {
2537         struct pci_dev *pdev = to_pci_dev(device);
2538         struct net_device *netdev = pci_get_drvdata(pdev);
2539         struct pch_gbe_adapter *adapter = netdev_priv(netdev);
2540         struct pch_gbe_hw *hw = &adapter->hw;
2541         u32 err;
2542 
2543         err = pci_enable_device(pdev);
2544         if (err) {
2545                 netdev_err(netdev, "Cannot enable PCI device from suspend\n");
2546                 return err;
2547         }
2548         pci_set_master(pdev);
2549         pch_gbe_hal_power_up_phy(hw);
2550         pch_gbe_reset(adapter);
2551         /* Clear wake on lan control and status */
2552         pch_gbe_mac_set_wol_event(hw, 0);
2553 
2554         if (netif_running(netdev))
2555                 pch_gbe_up(adapter);
2556         netif_device_attach(netdev);
2557 
2558         return 0;
2559 }
2560 #endif /* CONFIG_PM */
2561 
2562 static void pch_gbe_shutdown(struct pci_dev *pdev)
2563 {
2564         __pch_gbe_suspend(pdev);
2565         if (system_state == SYSTEM_POWER_OFF) {
2566                 pci_wake_from_d3(pdev, true);
2567                 pci_set_power_state(pdev, PCI_D3hot);
2568         }
2569 }
2570 
2571 static void pch_gbe_remove(struct pci_dev *pdev)
2572 {
2573         struct net_device *netdev = pci_get_drvdata(pdev);
2574         struct pch_gbe_adapter *adapter = netdev_priv(netdev);
2575 
2576         cancel_work_sync(&adapter->reset_task);
2577         unregister_netdev(netdev);
2578 
2579         pch_gbe_hal_phy_hw_reset(&adapter->hw);
2580 
2581         free_netdev(netdev);
2582 }
2583 
2584 static int pch_gbe_probe(struct pci_dev *pdev,
2585                           const struct pci_device_id *pci_id)
2586 {
2587         struct net_device *netdev;
2588         struct pch_gbe_adapter *adapter;
2589         int ret;
2590 
2591         ret = pcim_enable_device(pdev);
2592         if (ret)
2593                 return ret;
2594 
2595         if (pci_set_dma_mask(pdev, DMA_BIT_MASK(64))
2596                 || pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64))) {
2597                 ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
2598                 if (ret) {
2599                         ret = pci_set_consistent_dma_mask(pdev,
2600                                                           DMA_BIT_MASK(32));
2601                         if (ret) {
2602                                 dev_err(&pdev->dev, "ERR: No usable DMA "
2603                                         "configuration, aborting\n");
2604                                 return ret;
2605                         }
2606                 }
2607         }
2608 
2609         ret = pcim_iomap_regions(pdev, 1 << PCH_GBE_PCI_BAR, pci_name(pdev));
2610         if (ret) {
2611                 dev_err(&pdev->dev,
2612                         "ERR: Can't reserve PCI I/O and memory resources\n");
2613                 return ret;
2614         }
2615         pci_set_master(pdev);
2616 
2617         netdev = alloc_etherdev((int)sizeof(struct pch_gbe_adapter));
2618         if (!netdev)
2619                 return -ENOMEM;
2620         SET_NETDEV_DEV(netdev, &pdev->dev);
2621 
2622         pci_set_drvdata(pdev, netdev);
2623         adapter = netdev_priv(netdev);
2624         adapter->netdev = netdev;
2625         adapter->pdev = pdev;
2626         adapter->hw.back = adapter;
2627         adapter->hw.reg = pcim_iomap_table(pdev)[PCH_GBE_PCI_BAR];
2628         adapter->pdata = (struct pch_gbe_privdata *)pci_id->driver_data;
2629         if (adapter->pdata && adapter->pdata->platform_init)
2630                 adapter->pdata->platform_init(pdev);
2631 
2632         adapter->ptp_pdev = pci_get_bus_and_slot(adapter->pdev->bus->number,
2633                                                PCI_DEVFN(12, 4));
2634 
2635         netdev->netdev_ops = &pch_gbe_netdev_ops;
2636         netdev->watchdog_timeo = PCH_GBE_WATCHDOG_PERIOD;
2637         netif_napi_add(netdev, &adapter->napi,
2638                        pch_gbe_napi_poll, PCH_GBE_RX_WEIGHT);
2639         netdev->hw_features = NETIF_F_RXCSUM |
2640                 NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
2641         netdev->features = netdev->hw_features;
2642         pch_gbe_set_ethtool_ops(netdev);
2643 
2644         pch_gbe_mac_load_mac_addr(&adapter->hw);
2645         pch_gbe_mac_reset_hw(&adapter->hw);
2646 
2647         /* setup the private structure */
2648         ret = pch_gbe_sw_init(adapter);
2649         if (ret)
2650                 goto err_free_netdev;
2651 
2652         /* Initialize PHY */
2653         ret = pch_gbe_init_phy(adapter);
2654         if (ret) {
2655                 dev_err(&pdev->dev, "PHY initialize error\n");
2656                 goto err_free_adapter;
2657         }
2658         pch_gbe_hal_get_bus_info(&adapter->hw);
2659 
2660         /* Read the MAC address. and store to the private data */
2661         ret = pch_gbe_hal_read_mac_addr(&adapter->hw);
2662         if (ret) {
2663                 dev_err(&pdev->dev, "MAC address Read Error\n");
2664                 goto err_free_adapter;
2665         }
2666 
2667         memcpy(netdev->dev_addr, adapter->hw.mac.addr, netdev->addr_len);
2668         if (!is_valid_ether_addr(netdev->dev_addr)) {
2669                 /*
2670                  * If the MAC is invalid (or just missing), display a warning
2671                  * but do not abort setting up the device. pch_gbe_up will
2672                  * prevent the interface from being brought up until a valid MAC
2673                  * is set.
2674                  */
2675                 dev_err(&pdev->dev, "Invalid MAC address, "
2676                                     "interface disabled.\n");
2677         }
2678         setup_timer(&adapter->watchdog_timer, pch_gbe_watchdog,
2679                     (unsigned long)adapter);
2680 
2681         INIT_WORK(&adapter->reset_task, pch_gbe_reset_task);
2682 
2683         pch_gbe_check_options(adapter);
2684 
2685         /* initialize the wol settings based on the eeprom settings */
2686         adapter->wake_up_evt = PCH_GBE_WL_INIT_SETTING;
2687         dev_info(&pdev->dev, "MAC address : %pM\n", netdev->dev_addr);
2688 
2689         /* reset the hardware with the new settings */
2690         pch_gbe_reset(adapter);
2691 
2692         ret = register_netdev(netdev);
2693         if (ret)
2694                 goto err_free_adapter;
2695         /* tell the stack to leave us alone until pch_gbe_open() is called */
2696         netif_carrier_off(netdev);
2697         netif_stop_queue(netdev);
2698 
2699         dev_dbg(&pdev->dev, "PCH Network Connection\n");
2700 
2701         /* Disable hibernation on certain platforms */
2702         if (adapter->pdata && adapter->pdata->phy_disable_hibernate)
2703                 pch_gbe_phy_disable_hibernate(&adapter->hw);
2704 
2705         device_set_wakeup_enable(&pdev->dev, 1);
2706         return 0;
2707 
2708 err_free_adapter:
2709         pch_gbe_hal_phy_hw_reset(&adapter->hw);
2710 err_free_netdev:
2711         free_netdev(netdev);
2712         return ret;
2713 }
2714 
2715 /* The AR803X PHY on the MinnowBoard requires a physical pin to be toggled to
2716  * ensure it is awake for probe and init. Request the line and reset the PHY.
2717  */
2718 static int pch_gbe_minnow_platform_init(struct pci_dev *pdev)
2719 {
2720         unsigned long flags = GPIOF_DIR_OUT | GPIOF_INIT_HIGH | GPIOF_EXPORT;
2721         unsigned gpio = MINNOW_PHY_RESET_GPIO;
2722         int ret;
2723 
2724         ret = devm_gpio_request_one(&pdev->dev, gpio, flags,
2725                                     "minnow_phy_reset");
2726         if (ret) {
2727                 dev_err(&pdev->dev,
2728                         "ERR: Can't request PHY reset GPIO line '%d'\n", gpio);
2729                 return ret;
2730         }
2731 
2732         gpio_set_value(gpio, 0);
2733         usleep_range(1250, 1500);
2734         gpio_set_value(gpio, 1);
2735         usleep_range(1250, 1500);
2736 
2737         return ret;
2738 }
2739 
2740 static struct pch_gbe_privdata pch_gbe_minnow_privdata = {
2741         .phy_tx_clk_delay = true,
2742         .phy_disable_hibernate = true,
2743         .platform_init = pch_gbe_minnow_platform_init,
2744 };
2745 
2746 static const struct pci_device_id pch_gbe_pcidev_id[] = {
2747         {.vendor = PCI_VENDOR_ID_INTEL,
2748          .device = PCI_DEVICE_ID_INTEL_IOH1_GBE,
2749          .subvendor = PCI_VENDOR_ID_CIRCUITCO,
2750          .subdevice = PCI_SUBSYSTEM_ID_CIRCUITCO_MINNOWBOARD,
2751          .class = (PCI_CLASS_NETWORK_ETHERNET << 8),
2752          .class_mask = (0xFFFF00),
2753          .driver_data = (kernel_ulong_t)&pch_gbe_minnow_privdata
2754          },
2755         {.vendor = PCI_VENDOR_ID_INTEL,
2756          .device = PCI_DEVICE_ID_INTEL_IOH1_GBE,
2757          .subvendor = PCI_ANY_ID,
2758          .subdevice = PCI_ANY_ID,
2759          .class = (PCI_CLASS_NETWORK_ETHERNET << 8),
2760          .class_mask = (0xFFFF00)
2761          },
2762         {.vendor = PCI_VENDOR_ID_ROHM,
2763          .device = PCI_DEVICE_ID_ROHM_ML7223_GBE,
2764          .subvendor = PCI_ANY_ID,
2765          .subdevice = PCI_ANY_ID,
2766          .class = (PCI_CLASS_NETWORK_ETHERNET << 8),
2767          .class_mask = (0xFFFF00)
2768          },
2769         {.vendor = PCI_VENDOR_ID_ROHM,
2770          .device = PCI_DEVICE_ID_ROHM_ML7831_GBE,
2771          .subvendor = PCI_ANY_ID,
2772          .subdevice = PCI_ANY_ID,
2773          .class = (PCI_CLASS_NETWORK_ETHERNET << 8),
2774          .class_mask = (0xFFFF00)
2775          },
2776         /* required last entry */
2777         {0}
2778 };
2779 
2780 #ifdef CONFIG_PM
2781 static const struct dev_pm_ops pch_gbe_pm_ops = {
2782         .suspend = pch_gbe_suspend,
2783         .resume = pch_gbe_resume,
2784         .freeze = pch_gbe_suspend,
2785         .thaw = pch_gbe_resume,
2786         .poweroff = pch_gbe_suspend,
2787         .restore = pch_gbe_resume,
2788 };
2789 #endif
2790 
2791 static const struct pci_error_handlers pch_gbe_err_handler = {
2792         .error_detected = pch_gbe_io_error_detected,
2793         .slot_reset = pch_gbe_io_slot_reset,
2794         .resume = pch_gbe_io_resume
2795 };
2796 
2797 static struct pci_driver pch_gbe_driver = {
2798         .name = KBUILD_MODNAME,
2799         .id_table = pch_gbe_pcidev_id,
2800         .probe = pch_gbe_probe,
2801         .remove = pch_gbe_remove,
2802 #ifdef CONFIG_PM
2803         .driver.pm = &pch_gbe_pm_ops,
2804 #endif
2805         .shutdown = pch_gbe_shutdown,
2806         .err_handler = &pch_gbe_err_handler
2807 };
2808 
2809 
2810 static int __init pch_gbe_init_module(void)
2811 {
2812         int ret;
2813 
2814         pr_info("EG20T PCH Gigabit Ethernet Driver - version %s\n",DRV_VERSION);
2815         ret = pci_register_driver(&pch_gbe_driver);
2816         if (copybreak != PCH_GBE_COPYBREAK_DEFAULT) {
2817                 if (copybreak == 0) {
2818                         pr_info("copybreak disabled\n");
2819                 } else {
2820                         pr_info("copybreak enabled for packets <= %u bytes\n",
2821                                 copybreak);
2822                 }
2823         }
2824         return ret;
2825 }
2826 
2827 static void __exit pch_gbe_exit_module(void)
2828 {
2829         pci_unregister_driver(&pch_gbe_driver);
2830 }
2831 
2832 module_init(pch_gbe_init_module);
2833 module_exit(pch_gbe_exit_module);
2834 
2835 MODULE_DESCRIPTION("EG20T PCH Gigabit ethernet Driver");
2836 MODULE_AUTHOR("LAPIS SEMICONDUCTOR, <tshimizu818@gmail.com>");
2837 MODULE_LICENSE("GPL");
2838 MODULE_VERSION(DRV_VERSION);
2839 MODULE_DEVICE_TABLE(pci, pch_gbe_pcidev_id);
2840 
2841 module_param(copybreak, uint, 0644);
2842 MODULE_PARM_DESC(copybreak,
2843         "Maximum size of packet that is copied to a new buffer on receive");
2844 
2845 /* pch_gbe_main.c */
2846 

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