Version:  2.0.40 2.2.26 2.4.37 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 4.9

Linux/drivers/staging/octeon/ethernet.c

  1 /*
  2  * This file is based on code from OCTEON SDK by Cavium Networks.
  3  *
  4  * Copyright (c) 2003-2007 Cavium Networks
  5  *
  6  * This file is free software; you can redistribute it and/or modify
  7  * it under the terms of the GNU General Public License, Version 2, as
  8  * published by the Free Software Foundation.
  9  */
 10 
 11 #include <linux/platform_device.h>
 12 #include <linux/kernel.h>
 13 #include <linux/module.h>
 14 #include <linux/netdevice.h>
 15 #include <linux/etherdevice.h>
 16 #include <linux/phy.h>
 17 #include <linux/slab.h>
 18 #include <linux/interrupt.h>
 19 #include <linux/of_net.h>
 20 #include <linux/if_ether.h>
 21 #include <linux/if_vlan.h>
 22 
 23 #include <net/dst.h>
 24 
 25 #include <asm/octeon/octeon.h>
 26 
 27 #include "ethernet-defines.h"
 28 #include "octeon-ethernet.h"
 29 #include "ethernet-mem.h"
 30 #include "ethernet-rx.h"
 31 #include "ethernet-tx.h"
 32 #include "ethernet-mdio.h"
 33 #include "ethernet-util.h"
 34 
 35 #include <asm/octeon/cvmx-pip.h>
 36 #include <asm/octeon/cvmx-pko.h>
 37 #include <asm/octeon/cvmx-fau.h>
 38 #include <asm/octeon/cvmx-ipd.h>
 39 #include <asm/octeon/cvmx-helper.h>
 40 #include <asm/octeon/cvmx-asxx-defs.h>
 41 #include <asm/octeon/cvmx-gmxx-defs.h>
 42 #include <asm/octeon/cvmx-smix-defs.h>
 43 
 44 #define OCTEON_MAX_MTU 65392
 45 
 46 static int num_packet_buffers = 1024;
 47 module_param(num_packet_buffers, int, 0444);
 48 MODULE_PARM_DESC(num_packet_buffers, "\n"
 49         "\tNumber of packet buffers to allocate and store in the\n"
 50         "\tFPA. By default, 1024 packet buffers are used.\n");
 51 
 52 static int pow_receive_group = 15;
 53 module_param(pow_receive_group, int, 0444);
 54 MODULE_PARM_DESC(pow_receive_group, "\n"
 55         "\tPOW group to receive packets from. All ethernet hardware\n"
 56         "\twill be configured to send incoming packets to this POW\n"
 57         "\tgroup. Also any other software can submit packets to this\n"
 58         "\tgroup for the kernel to process.");
 59 
 60 static int receive_group_order;
 61 module_param(receive_group_order, int, 0444);
 62 MODULE_PARM_DESC(receive_group_order, "\n"
 63         "\tOrder (0..4) of receive groups to take into use. Ethernet hardware\n"
 64         "\twill be configured to send incoming packets to multiple POW\n"
 65         "\tgroups. pow_receive_group parameter is ignored when multiple\n"
 66         "\tgroups are taken into use and groups are allocated starting\n"
 67         "\tfrom 0. By default, a single group is used.\n");
 68 
 69 int pow_send_group = -1;
 70 module_param(pow_send_group, int, 0644);
 71 MODULE_PARM_DESC(pow_send_group, "\n"
 72         "\tPOW group to send packets to other software on. This\n"
 73         "\tcontrols the creation of the virtual device pow0.\n"
 74         "\talways_use_pow also depends on this value.");
 75 
 76 int always_use_pow;
 77 module_param(always_use_pow, int, 0444);
 78 MODULE_PARM_DESC(always_use_pow, "\n"
 79         "\tWhen set, always send to the pow group. This will cause\n"
 80         "\tpackets sent to real ethernet devices to be sent to the\n"
 81         "\tPOW group instead of the hardware. Unless some other\n"
 82         "\tapplication changes the config, packets will still be\n"
 83         "\treceived from the low level hardware. Use this option\n"
 84         "\tto allow a CVMX app to intercept all packets from the\n"
 85         "\tlinux kernel. You must specify pow_send_group along with\n"
 86         "\tthis option.");
 87 
 88 char pow_send_list[128] = "";
 89 module_param_string(pow_send_list, pow_send_list, sizeof(pow_send_list), 0444);
 90 MODULE_PARM_DESC(pow_send_list, "\n"
 91         "\tComma separated list of ethernet devices that should use the\n"
 92         "\tPOW for transmit instead of the actual ethernet hardware. This\n"
 93         "\tis a per port version of always_use_pow. always_use_pow takes\n"
 94         "\tprecedence over this list. For example, setting this to\n"
 95         "\t\"eth2,spi3,spi7\" would cause these three devices to transmit\n"
 96         "\tusing the pow_send_group.");
 97 
 98 int rx_napi_weight = 32;
 99 module_param(rx_napi_weight, int, 0444);
100 MODULE_PARM_DESC(rx_napi_weight, "The NAPI WEIGHT parameter.");
101 
102 /* Mask indicating which receive groups are in use. */
103 int pow_receive_groups;
104 
105 /*
106  * cvm_oct_poll_queue_stopping - flag to indicate polling should stop.
107  *
108  * Set to one right before cvm_oct_poll_queue is destroyed.
109  */
110 atomic_t cvm_oct_poll_queue_stopping = ATOMIC_INIT(0);
111 
112 /*
113  * Array of every ethernet device owned by this driver indexed by
114  * the ipd input port number.
115  */
116 struct net_device *cvm_oct_device[TOTAL_NUMBER_OF_PORTS];
117 
118 u64 cvm_oct_tx_poll_interval;
119 
120 static void cvm_oct_rx_refill_worker(struct work_struct *work);
121 static DECLARE_DELAYED_WORK(cvm_oct_rx_refill_work, cvm_oct_rx_refill_worker);
122 
123 static void cvm_oct_rx_refill_worker(struct work_struct *work)
124 {
125         /*
126          * FPA 0 may have been drained, try to refill it if we need
127          * more than num_packet_buffers / 2, otherwise normal receive
128          * processing will refill it.  If it were drained, no packets
129          * could be received so cvm_oct_napi_poll would never be
130          * invoked to do the refill.
131          */
132         cvm_oct_rx_refill_pool(num_packet_buffers / 2);
133 
134         if (!atomic_read(&cvm_oct_poll_queue_stopping))
135                 schedule_delayed_work(&cvm_oct_rx_refill_work, HZ);
136 }
137 
138 static void cvm_oct_periodic_worker(struct work_struct *work)
139 {
140         struct octeon_ethernet *priv = container_of(work,
141                                                     struct octeon_ethernet,
142                                                     port_periodic_work.work);
143 
144         if (priv->poll)
145                 priv->poll(cvm_oct_device[priv->port]);
146 
147         cvm_oct_device[priv->port]->netdev_ops->ndo_get_stats(
148                                                 cvm_oct_device[priv->port]);
149 
150         if (!atomic_read(&cvm_oct_poll_queue_stopping))
151                 schedule_delayed_work(&priv->port_periodic_work, HZ);
152 }
153 
154 static void cvm_oct_configure_common_hw(void)
155 {
156         /* Setup the FPA */
157         cvmx_fpa_enable();
158         cvm_oct_mem_fill_fpa(CVMX_FPA_PACKET_POOL, CVMX_FPA_PACKET_POOL_SIZE,
159                              num_packet_buffers);
160         cvm_oct_mem_fill_fpa(CVMX_FPA_WQE_POOL, CVMX_FPA_WQE_POOL_SIZE,
161                              num_packet_buffers);
162         if (CVMX_FPA_OUTPUT_BUFFER_POOL != CVMX_FPA_PACKET_POOL)
163                 cvm_oct_mem_fill_fpa(CVMX_FPA_OUTPUT_BUFFER_POOL,
164                                      CVMX_FPA_OUTPUT_BUFFER_POOL_SIZE, 1024);
165 
166 #ifdef __LITTLE_ENDIAN
167         {
168                 union cvmx_ipd_ctl_status ipd_ctl_status;
169 
170                 ipd_ctl_status.u64 = cvmx_read_csr(CVMX_IPD_CTL_STATUS);
171                 ipd_ctl_status.s.pkt_lend = 1;
172                 ipd_ctl_status.s.wqe_lend = 1;
173                 cvmx_write_csr(CVMX_IPD_CTL_STATUS, ipd_ctl_status.u64);
174         }
175 #endif
176 
177         cvmx_helper_setup_red(num_packet_buffers / 4, num_packet_buffers / 8);
178 }
179 
180 /**
181  * cvm_oct_free_work- Free a work queue entry
182  *
183  * @work_queue_entry: Work queue entry to free
184  *
185  * Returns Zero on success, Negative on failure.
186  */
187 int cvm_oct_free_work(void *work_queue_entry)
188 {
189         cvmx_wqe_t *work = work_queue_entry;
190 
191         int segments = work->word2.s.bufs;
192         union cvmx_buf_ptr segment_ptr = work->packet_ptr;
193 
194         while (segments--) {
195                 union cvmx_buf_ptr next_ptr = *(union cvmx_buf_ptr *)
196                         cvmx_phys_to_ptr(segment_ptr.s.addr - 8);
197                 if (unlikely(!segment_ptr.s.i))
198                         cvmx_fpa_free(cvm_oct_get_buffer_ptr(segment_ptr),
199                                       segment_ptr.s.pool,
200                                       CVMX_FPA_PACKET_POOL_SIZE / 128);
201                 segment_ptr = next_ptr;
202         }
203         cvmx_fpa_free(work, CVMX_FPA_WQE_POOL, 1);
204 
205         return 0;
206 }
207 EXPORT_SYMBOL(cvm_oct_free_work);
208 
209 /**
210  * cvm_oct_common_get_stats - get the low level ethernet statistics
211  * @dev:    Device to get the statistics from
212  *
213  * Returns Pointer to the statistics
214  */
215 static struct net_device_stats *cvm_oct_common_get_stats(struct net_device *dev)
216 {
217         cvmx_pip_port_status_t rx_status;
218         cvmx_pko_port_status_t tx_status;
219         struct octeon_ethernet *priv = netdev_priv(dev);
220 
221         if (priv->port < CVMX_PIP_NUM_INPUT_PORTS) {
222                 if (octeon_is_simulation()) {
223                         /* The simulator doesn't support statistics */
224                         memset(&rx_status, 0, sizeof(rx_status));
225                         memset(&tx_status, 0, sizeof(tx_status));
226                 } else {
227                         cvmx_pip_get_port_status(priv->port, 1, &rx_status);
228                         cvmx_pko_get_port_status(priv->port, 1, &tx_status);
229                 }
230 
231                 priv->stats.rx_packets += rx_status.inb_packets;
232                 priv->stats.tx_packets += tx_status.packets;
233                 priv->stats.rx_bytes += rx_status.inb_octets;
234                 priv->stats.tx_bytes += tx_status.octets;
235                 priv->stats.multicast += rx_status.multicast_packets;
236                 priv->stats.rx_crc_errors += rx_status.inb_errors;
237                 priv->stats.rx_frame_errors += rx_status.fcs_align_err_packets;
238                 priv->stats.rx_dropped += rx_status.dropped_packets;
239         }
240 
241         return &priv->stats;
242 }
243 
244 /**
245  * cvm_oct_common_change_mtu - change the link MTU
246  * @dev:     Device to change
247  * @new_mtu: The new MTU
248  *
249  * Returns Zero on success
250  */
251 static int cvm_oct_common_change_mtu(struct net_device *dev, int new_mtu)
252 {
253         struct octeon_ethernet *priv = netdev_priv(dev);
254         int interface = INTERFACE(priv->port);
255 #if IS_ENABLED(CONFIG_VLAN_8021Q)
256         int vlan_bytes = VLAN_HLEN;
257 #else
258         int vlan_bytes = 0;
259 #endif
260         int mtu_overhead = ETH_HLEN + ETH_FCS_LEN + vlan_bytes;
261 
262         /*
263          * Limit the MTU to make sure the ethernet packets are between
264          * 64 bytes and 65535 bytes.
265          */
266         if ((new_mtu + mtu_overhead < VLAN_ETH_ZLEN) ||
267             (new_mtu + mtu_overhead > OCTEON_MAX_MTU)) {
268                 pr_err("MTU must be between %d and %d.\n",
269                        VLAN_ETH_ZLEN - mtu_overhead,
270                        OCTEON_MAX_MTU - mtu_overhead);
271                 return -EINVAL;
272         }
273         dev->mtu = new_mtu;
274 
275         if ((interface < 2) &&
276             (cvmx_helper_interface_get_mode(interface) !=
277                 CVMX_HELPER_INTERFACE_MODE_SPI)) {
278                 int index = INDEX(priv->port);
279                 /* Add ethernet header and FCS, and VLAN if configured. */
280                 int max_packet = new_mtu + mtu_overhead;
281 
282                 if (OCTEON_IS_MODEL(OCTEON_CN3XXX) ||
283                     OCTEON_IS_MODEL(OCTEON_CN58XX)) {
284                         /* Signal errors on packets larger than the MTU */
285                         cvmx_write_csr(CVMX_GMXX_RXX_FRM_MAX(index, interface),
286                                        max_packet);
287                 } else {
288                         /*
289                          * Set the hardware to truncate packets larger
290                          * than the MTU and smaller the 64 bytes.
291                          */
292                         union cvmx_pip_frm_len_chkx frm_len_chk;
293 
294                         frm_len_chk.u64 = 0;
295                         frm_len_chk.s.minlen = VLAN_ETH_ZLEN;
296                         frm_len_chk.s.maxlen = max_packet;
297                         cvmx_write_csr(CVMX_PIP_FRM_LEN_CHKX(interface),
298                                        frm_len_chk.u64);
299                 }
300                 /*
301                  * Set the hardware to truncate packets larger than
302                  * the MTU. The jabber register must be set to a
303                  * multiple of 8 bytes, so round up.
304                  */
305                 cvmx_write_csr(CVMX_GMXX_RXX_JABBER(index, interface),
306                                (max_packet + 7) & ~7u);
307         }
308         return 0;
309 }
310 
311 /**
312  * cvm_oct_common_set_multicast_list - set the multicast list
313  * @dev:    Device to work on
314  */
315 static void cvm_oct_common_set_multicast_list(struct net_device *dev)
316 {
317         union cvmx_gmxx_prtx_cfg gmx_cfg;
318         struct octeon_ethernet *priv = netdev_priv(dev);
319         int interface = INTERFACE(priv->port);
320 
321         if ((interface < 2) &&
322             (cvmx_helper_interface_get_mode(interface) !=
323                 CVMX_HELPER_INTERFACE_MODE_SPI)) {
324                 union cvmx_gmxx_rxx_adr_ctl control;
325                 int index = INDEX(priv->port);
326 
327                 control.u64 = 0;
328                 control.s.bcst = 1;     /* Allow broadcast MAC addresses */
329 
330                 if (!netdev_mc_empty(dev) || (dev->flags & IFF_ALLMULTI) ||
331                     (dev->flags & IFF_PROMISC))
332                         /* Force accept multicast packets */
333                         control.s.mcst = 2;
334                 else
335                         /* Force reject multicast packets */
336                         control.s.mcst = 1;
337 
338                 if (dev->flags & IFF_PROMISC)
339                         /*
340                          * Reject matches if promisc. Since CAM is
341                          * shut off, should accept everything.
342                          */
343                         control.s.cam_mode = 0;
344                 else
345                         /* Filter packets based on the CAM */
346                         control.s.cam_mode = 1;
347 
348                 gmx_cfg.u64 =
349                     cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
350                 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface),
351                                gmx_cfg.u64 & ~1ull);
352 
353                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CTL(index, interface),
354                                control.u64);
355                 if (dev->flags & IFF_PROMISC)
356                         cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM_EN
357                                        (index, interface), 0);
358                 else
359                         cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM_EN
360                                        (index, interface), 1);
361 
362                 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface),
363                                gmx_cfg.u64);
364         }
365 }
366 
367 static int cvm_oct_set_mac_filter(struct net_device *dev)
368 {
369         struct octeon_ethernet *priv = netdev_priv(dev);
370         union cvmx_gmxx_prtx_cfg gmx_cfg;
371         int interface = INTERFACE(priv->port);
372 
373         if ((interface < 2) &&
374             (cvmx_helper_interface_get_mode(interface) !=
375                 CVMX_HELPER_INTERFACE_MODE_SPI)) {
376                 int i;
377                 u8 *ptr = dev->dev_addr;
378                 u64 mac = 0;
379                 int index = INDEX(priv->port);
380 
381                 for (i = 0; i < 6; i++)
382                         mac = (mac << 8) | (u64)ptr[i];
383 
384                 gmx_cfg.u64 =
385                     cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
386                 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface),
387                                gmx_cfg.u64 & ~1ull);
388 
389                 cvmx_write_csr(CVMX_GMXX_SMACX(index, interface), mac);
390                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM0(index, interface),
391                                ptr[0]);
392                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM1(index, interface),
393                                ptr[1]);
394                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM2(index, interface),
395                                ptr[2]);
396                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM3(index, interface),
397                                ptr[3]);
398                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM4(index, interface),
399                                ptr[4]);
400                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM5(index, interface),
401                                ptr[5]);
402                 cvm_oct_common_set_multicast_list(dev);
403                 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface),
404                                gmx_cfg.u64);
405         }
406         return 0;
407 }
408 
409 /**
410  * cvm_oct_common_set_mac_address - set the hardware MAC address for a device
411  * @dev:    The device in question.
412  * @addr:   Socket address.
413  *
414  * Returns Zero on success
415  */
416 static int cvm_oct_common_set_mac_address(struct net_device *dev, void *addr)
417 {
418         int r = eth_mac_addr(dev, addr);
419 
420         if (r)
421                 return r;
422         return cvm_oct_set_mac_filter(dev);
423 }
424 
425 /**
426  * cvm_oct_common_init - per network device initialization
427  * @dev:    Device to initialize
428  *
429  * Returns Zero on success
430  */
431 int cvm_oct_common_init(struct net_device *dev)
432 {
433         struct octeon_ethernet *priv = netdev_priv(dev);
434         const u8 *mac = NULL;
435 
436         if (priv->of_node)
437                 mac = of_get_mac_address(priv->of_node);
438 
439         if (mac)
440                 ether_addr_copy(dev->dev_addr, mac);
441         else
442                 eth_hw_addr_random(dev);
443 
444         /*
445          * Force the interface to use the POW send if always_use_pow
446          * was specified or it is in the pow send list.
447          */
448         if ((pow_send_group != -1) &&
449             (always_use_pow || strstr(pow_send_list, dev->name)))
450                 priv->queue = -1;
451 
452         if (priv->queue != -1)
453                 dev->features |= NETIF_F_SG | NETIF_F_IP_CSUM;
454 
455         /* We do our own locking, Linux doesn't need to */
456         dev->features |= NETIF_F_LLTX;
457         dev->ethtool_ops = &cvm_oct_ethtool_ops;
458 
459         cvm_oct_set_mac_filter(dev);
460         dev->netdev_ops->ndo_change_mtu(dev, dev->mtu);
461 
462         /*
463          * Zero out stats for port so we won't mistakenly show
464          * counters from the bootloader.
465          */
466         memset(dev->netdev_ops->ndo_get_stats(dev), 0,
467                sizeof(struct net_device_stats));
468 
469         if (dev->netdev_ops->ndo_stop)
470                 dev->netdev_ops->ndo_stop(dev);
471 
472         return 0;
473 }
474 
475 void cvm_oct_common_uninit(struct net_device *dev)
476 {
477         if (dev->phydev)
478                 phy_disconnect(dev->phydev);
479 }
480 
481 int cvm_oct_common_open(struct net_device *dev,
482                         void (*link_poll)(struct net_device *))
483 {
484         union cvmx_gmxx_prtx_cfg gmx_cfg;
485         struct octeon_ethernet *priv = netdev_priv(dev);
486         int interface = INTERFACE(priv->port);
487         int index = INDEX(priv->port);
488         cvmx_helper_link_info_t link_info;
489         int rv;
490 
491         rv = cvm_oct_phy_setup_device(dev);
492         if (rv)
493                 return rv;
494 
495         gmx_cfg.u64 = cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
496         gmx_cfg.s.en = 1;
497         if (octeon_has_feature(OCTEON_FEATURE_PKND))
498                 gmx_cfg.s.pknd = priv->port;
499         cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), gmx_cfg.u64);
500 
501         if (octeon_is_simulation())
502                 return 0;
503 
504         if (dev->phydev) {
505                 int r = phy_read_status(dev->phydev);
506 
507                 if (r == 0 && dev->phydev->link == 0)
508                         netif_carrier_off(dev);
509                 cvm_oct_adjust_link(dev);
510         } else {
511                 link_info = cvmx_helper_link_get(priv->port);
512                 if (!link_info.s.link_up)
513                         netif_carrier_off(dev);
514                 priv->poll = link_poll;
515                 link_poll(dev);
516         }
517 
518         return 0;
519 }
520 
521 void cvm_oct_link_poll(struct net_device *dev)
522 {
523         struct octeon_ethernet *priv = netdev_priv(dev);
524         cvmx_helper_link_info_t link_info;
525 
526         link_info = cvmx_helper_link_get(priv->port);
527         if (link_info.u64 == priv->link_info)
528                 return;
529 
530         if (cvmx_helper_link_set(priv->port, link_info))
531                 link_info.u64 = priv->link_info;
532         else
533                 priv->link_info = link_info.u64;
534 
535         if (link_info.s.link_up) {
536                 if (!netif_carrier_ok(dev))
537                         netif_carrier_on(dev);
538         } else if (netif_carrier_ok(dev)) {
539                 netif_carrier_off(dev);
540         }
541         cvm_oct_note_carrier(priv, link_info);
542 }
543 
544 static int cvm_oct_xaui_open(struct net_device *dev)
545 {
546         return cvm_oct_common_open(dev, cvm_oct_link_poll);
547 }
548 
549 static const struct net_device_ops cvm_oct_npi_netdev_ops = {
550         .ndo_init               = cvm_oct_common_init,
551         .ndo_uninit             = cvm_oct_common_uninit,
552         .ndo_start_xmit         = cvm_oct_xmit,
553         .ndo_set_rx_mode        = cvm_oct_common_set_multicast_list,
554         .ndo_set_mac_address    = cvm_oct_common_set_mac_address,
555         .ndo_do_ioctl           = cvm_oct_ioctl,
556         .ndo_change_mtu         = cvm_oct_common_change_mtu,
557         .ndo_get_stats          = cvm_oct_common_get_stats,
558 #ifdef CONFIG_NET_POLL_CONTROLLER
559         .ndo_poll_controller    = cvm_oct_poll_controller,
560 #endif
561 };
562 
563 static const struct net_device_ops cvm_oct_xaui_netdev_ops = {
564         .ndo_init               = cvm_oct_common_init,
565         .ndo_uninit             = cvm_oct_common_uninit,
566         .ndo_open               = cvm_oct_xaui_open,
567         .ndo_stop               = cvm_oct_common_stop,
568         .ndo_start_xmit         = cvm_oct_xmit,
569         .ndo_set_rx_mode        = cvm_oct_common_set_multicast_list,
570         .ndo_set_mac_address    = cvm_oct_common_set_mac_address,
571         .ndo_do_ioctl           = cvm_oct_ioctl,
572         .ndo_change_mtu         = cvm_oct_common_change_mtu,
573         .ndo_get_stats          = cvm_oct_common_get_stats,
574 #ifdef CONFIG_NET_POLL_CONTROLLER
575         .ndo_poll_controller    = cvm_oct_poll_controller,
576 #endif
577 };
578 
579 static const struct net_device_ops cvm_oct_sgmii_netdev_ops = {
580         .ndo_init               = cvm_oct_sgmii_init,
581         .ndo_uninit             = cvm_oct_common_uninit,
582         .ndo_open               = cvm_oct_sgmii_open,
583         .ndo_stop               = cvm_oct_common_stop,
584         .ndo_start_xmit         = cvm_oct_xmit,
585         .ndo_set_rx_mode        = cvm_oct_common_set_multicast_list,
586         .ndo_set_mac_address    = cvm_oct_common_set_mac_address,
587         .ndo_do_ioctl           = cvm_oct_ioctl,
588         .ndo_change_mtu         = cvm_oct_common_change_mtu,
589         .ndo_get_stats          = cvm_oct_common_get_stats,
590 #ifdef CONFIG_NET_POLL_CONTROLLER
591         .ndo_poll_controller    = cvm_oct_poll_controller,
592 #endif
593 };
594 
595 static const struct net_device_ops cvm_oct_spi_netdev_ops = {
596         .ndo_init               = cvm_oct_spi_init,
597         .ndo_uninit             = cvm_oct_spi_uninit,
598         .ndo_start_xmit         = cvm_oct_xmit,
599         .ndo_set_rx_mode        = cvm_oct_common_set_multicast_list,
600         .ndo_set_mac_address    = cvm_oct_common_set_mac_address,
601         .ndo_do_ioctl           = cvm_oct_ioctl,
602         .ndo_change_mtu         = cvm_oct_common_change_mtu,
603         .ndo_get_stats          = cvm_oct_common_get_stats,
604 #ifdef CONFIG_NET_POLL_CONTROLLER
605         .ndo_poll_controller    = cvm_oct_poll_controller,
606 #endif
607 };
608 
609 static const struct net_device_ops cvm_oct_rgmii_netdev_ops = {
610         .ndo_init               = cvm_oct_common_init,
611         .ndo_uninit             = cvm_oct_common_uninit,
612         .ndo_open               = cvm_oct_rgmii_open,
613         .ndo_stop               = cvm_oct_common_stop,
614         .ndo_start_xmit         = cvm_oct_xmit,
615         .ndo_set_rx_mode        = cvm_oct_common_set_multicast_list,
616         .ndo_set_mac_address    = cvm_oct_common_set_mac_address,
617         .ndo_do_ioctl           = cvm_oct_ioctl,
618         .ndo_change_mtu         = cvm_oct_common_change_mtu,
619         .ndo_get_stats          = cvm_oct_common_get_stats,
620 #ifdef CONFIG_NET_POLL_CONTROLLER
621         .ndo_poll_controller    = cvm_oct_poll_controller,
622 #endif
623 };
624 
625 static const struct net_device_ops cvm_oct_pow_netdev_ops = {
626         .ndo_init               = cvm_oct_common_init,
627         .ndo_start_xmit         = cvm_oct_xmit_pow,
628         .ndo_set_rx_mode        = cvm_oct_common_set_multicast_list,
629         .ndo_set_mac_address    = cvm_oct_common_set_mac_address,
630         .ndo_do_ioctl           = cvm_oct_ioctl,
631         .ndo_change_mtu         = cvm_oct_common_change_mtu,
632         .ndo_get_stats          = cvm_oct_common_get_stats,
633 #ifdef CONFIG_NET_POLL_CONTROLLER
634         .ndo_poll_controller    = cvm_oct_poll_controller,
635 #endif
636 };
637 
638 static struct device_node *cvm_oct_of_get_child(
639                                 const struct device_node *parent, int reg_val)
640 {
641         struct device_node *node = NULL;
642         int size;
643         const __be32 *addr;
644 
645         for (;;) {
646                 node = of_get_next_child(parent, node);
647                 if (!node)
648                         break;
649                 addr = of_get_property(node, "reg", &size);
650                 if (addr && (be32_to_cpu(*addr) == reg_val))
651                         break;
652         }
653         return node;
654 }
655 
656 static struct device_node *cvm_oct_node_for_port(struct device_node *pip,
657                                                  int interface, int port)
658 {
659         struct device_node *ni, *np;
660 
661         ni = cvm_oct_of_get_child(pip, interface);
662         if (!ni)
663                 return NULL;
664 
665         np = cvm_oct_of_get_child(ni, port);
666         of_node_put(ni);
667 
668         return np;
669 }
670 
671 static void cvm_set_rgmii_delay(struct device_node *np, int iface, int port)
672 {
673         u32 delay_value;
674 
675         if (!of_property_read_u32(np, "rx-delay", &delay_value))
676                 cvmx_write_csr(CVMX_ASXX_RX_CLK_SETX(port, iface), delay_value);
677         if (!of_property_read_u32(np, "tx-delay", &delay_value))
678                 cvmx_write_csr(CVMX_ASXX_TX_CLK_SETX(port, iface), delay_value);
679 }
680 
681 static int cvm_oct_probe(struct platform_device *pdev)
682 {
683         int num_interfaces;
684         int interface;
685         int fau = FAU_NUM_PACKET_BUFFERS_TO_FREE;
686         int qos;
687         struct device_node *pip;
688 
689         octeon_mdiobus_force_mod_depencency();
690 
691         pip = pdev->dev.of_node;
692         if (!pip) {
693                 pr_err("Error: No 'pip' in /aliases\n");
694                 return -EINVAL;
695         }
696 
697         cvm_oct_configure_common_hw();
698 
699         cvmx_helper_initialize_packet_io_global();
700 
701         if (receive_group_order) {
702                 if (receive_group_order > 4)
703                         receive_group_order = 4;
704                 pow_receive_groups = (1 << (1 << receive_group_order)) - 1;
705         } else {
706                 pow_receive_groups = BIT(pow_receive_group);
707         }
708 
709         /* Change the input group for all ports before input is enabled */
710         num_interfaces = cvmx_helper_get_number_of_interfaces();
711         for (interface = 0; interface < num_interfaces; interface++) {
712                 int num_ports = cvmx_helper_ports_on_interface(interface);
713                 int port;
714 
715                 for (port = cvmx_helper_get_ipd_port(interface, 0);
716                      port < cvmx_helper_get_ipd_port(interface, num_ports);
717                      port++) {
718                         union cvmx_pip_prt_tagx pip_prt_tagx;
719 
720                         pip_prt_tagx.u64 =
721                             cvmx_read_csr(CVMX_PIP_PRT_TAGX(port));
722 
723                         if (receive_group_order) {
724                                 int tag_mask;
725 
726                                 /* We support only 16 groups at the moment, so
727                                  * always disable the two additional "hidden"
728                                  * tag_mask bits on CN68XX.
729                                  */
730                                 if (OCTEON_IS_MODEL(OCTEON_CN68XX))
731                                         pip_prt_tagx.u64 |= 0x3ull << 44;
732 
733                                 tag_mask = ~((1 << receive_group_order) - 1);
734                                 pip_prt_tagx.s.grptagbase       = 0;
735                                 pip_prt_tagx.s.grptagmask       = tag_mask;
736                                 pip_prt_tagx.s.grptag           = 1;
737                                 pip_prt_tagx.s.tag_mode         = 0;
738                                 pip_prt_tagx.s.inc_prt_flag     = 1;
739                                 pip_prt_tagx.s.ip6_dprt_flag    = 1;
740                                 pip_prt_tagx.s.ip4_dprt_flag    = 1;
741                                 pip_prt_tagx.s.ip6_sprt_flag    = 1;
742                                 pip_prt_tagx.s.ip4_sprt_flag    = 1;
743                                 pip_prt_tagx.s.ip6_dst_flag     = 1;
744                                 pip_prt_tagx.s.ip4_dst_flag     = 1;
745                                 pip_prt_tagx.s.ip6_src_flag     = 1;
746                                 pip_prt_tagx.s.ip4_src_flag     = 1;
747                                 pip_prt_tagx.s.grp              = 0;
748                         } else {
749                                 pip_prt_tagx.s.grptag   = 0;
750                                 pip_prt_tagx.s.grp      = pow_receive_group;
751                         }
752 
753                         cvmx_write_csr(CVMX_PIP_PRT_TAGX(port),
754                                        pip_prt_tagx.u64);
755                 }
756         }
757 
758         cvmx_helper_ipd_and_packet_input_enable();
759 
760         memset(cvm_oct_device, 0, sizeof(cvm_oct_device));
761 
762         /*
763          * Initialize the FAU used for counting packet buffers that
764          * need to be freed.
765          */
766         cvmx_fau_atomic_write32(FAU_NUM_PACKET_BUFFERS_TO_FREE, 0);
767 
768         /* Initialize the FAU used for counting tx SKBs that need to be freed */
769         cvmx_fau_atomic_write32(FAU_TOTAL_TX_TO_CLEAN, 0);
770 
771         if ((pow_send_group != -1)) {
772                 struct net_device *dev;
773 
774                 dev = alloc_etherdev(sizeof(struct octeon_ethernet));
775                 if (dev) {
776                         /* Initialize the device private structure. */
777                         struct octeon_ethernet *priv = netdev_priv(dev);
778 
779                         dev->netdev_ops = &cvm_oct_pow_netdev_ops;
780                         priv->imode = CVMX_HELPER_INTERFACE_MODE_DISABLED;
781                         priv->port = CVMX_PIP_NUM_INPUT_PORTS;
782                         priv->queue = -1;
783                         strcpy(dev->name, "pow%d");
784                         for (qos = 0; qos < 16; qos++)
785                                 skb_queue_head_init(&priv->tx_free_list[qos]);
786 
787                         if (register_netdev(dev) < 0) {
788                                 pr_err("Failed to register ethernet device for POW\n");
789                                 free_netdev(dev);
790                         } else {
791                                 cvm_oct_device[CVMX_PIP_NUM_INPUT_PORTS] = dev;
792                                 pr_info("%s: POW send group %d, receive group %d\n",
793                                         dev->name, pow_send_group,
794                                         pow_receive_group);
795                         }
796                 } else {
797                         pr_err("Failed to allocate ethernet device for POW\n");
798                 }
799         }
800 
801         num_interfaces = cvmx_helper_get_number_of_interfaces();
802         for (interface = 0; interface < num_interfaces; interface++) {
803                 cvmx_helper_interface_mode_t imode =
804                     cvmx_helper_interface_get_mode(interface);
805                 int num_ports = cvmx_helper_ports_on_interface(interface);
806                 int port;
807                 int port_index;
808 
809                 for (port_index = 0,
810                      port = cvmx_helper_get_ipd_port(interface, 0);
811                      port < cvmx_helper_get_ipd_port(interface, num_ports);
812                      port_index++, port++) {
813                         struct octeon_ethernet *priv;
814                         struct net_device *dev =
815                             alloc_etherdev(sizeof(struct octeon_ethernet));
816                         if (!dev) {
817                                 pr_err("Failed to allocate ethernet device for port %d\n",
818                                        port);
819                                 continue;
820                         }
821 
822                         /* Initialize the device private structure. */
823                         priv = netdev_priv(dev);
824                         priv->netdev = dev;
825                         priv->of_node = cvm_oct_node_for_port(pip, interface,
826                                                                 port_index);
827 
828                         INIT_DELAYED_WORK(&priv->port_periodic_work,
829                                           cvm_oct_periodic_worker);
830                         priv->imode = imode;
831                         priv->port = port;
832                         priv->queue = cvmx_pko_get_base_queue(priv->port);
833                         priv->fau = fau - cvmx_pko_get_num_queues(port) * 4;
834                         for (qos = 0; qos < 16; qos++)
835                                 skb_queue_head_init(&priv->tx_free_list[qos]);
836                         for (qos = 0; qos < cvmx_pko_get_num_queues(port);
837                              qos++)
838                                 cvmx_fau_atomic_write32(priv->fau + qos * 4, 0);
839 
840                         switch (priv->imode) {
841                         /* These types don't support ports to IPD/PKO */
842                         case CVMX_HELPER_INTERFACE_MODE_DISABLED:
843                         case CVMX_HELPER_INTERFACE_MODE_PCIE:
844                         case CVMX_HELPER_INTERFACE_MODE_PICMG:
845                                 break;
846 
847                         case CVMX_HELPER_INTERFACE_MODE_NPI:
848                                 dev->netdev_ops = &cvm_oct_npi_netdev_ops;
849                                 strcpy(dev->name, "npi%d");
850                                 break;
851 
852                         case CVMX_HELPER_INTERFACE_MODE_XAUI:
853                                 dev->netdev_ops = &cvm_oct_xaui_netdev_ops;
854                                 strcpy(dev->name, "xaui%d");
855                                 break;
856 
857                         case CVMX_HELPER_INTERFACE_MODE_LOOP:
858                                 dev->netdev_ops = &cvm_oct_npi_netdev_ops;
859                                 strcpy(dev->name, "loop%d");
860                                 break;
861 
862                         case CVMX_HELPER_INTERFACE_MODE_SGMII:
863                                 dev->netdev_ops = &cvm_oct_sgmii_netdev_ops;
864                                 strcpy(dev->name, "eth%d");
865                                 break;
866 
867                         case CVMX_HELPER_INTERFACE_MODE_SPI:
868                                 dev->netdev_ops = &cvm_oct_spi_netdev_ops;
869                                 strcpy(dev->name, "spi%d");
870                                 break;
871 
872                         case CVMX_HELPER_INTERFACE_MODE_RGMII:
873                         case CVMX_HELPER_INTERFACE_MODE_GMII:
874                                 dev->netdev_ops = &cvm_oct_rgmii_netdev_ops;
875                                 strcpy(dev->name, "eth%d");
876                                 cvm_set_rgmii_delay(priv->of_node, interface,
877                                                     port_index);
878                                 break;
879                         }
880 
881                         if (!dev->netdev_ops) {
882                                 free_netdev(dev);
883                         } else if (register_netdev(dev) < 0) {
884                                 pr_err("Failed to register ethernet device for interface %d, port %d\n",
885                                        interface, priv->port);
886                                 free_netdev(dev);
887                         } else {
888                                 cvm_oct_device[priv->port] = dev;
889                                 fau -=
890                                     cvmx_pko_get_num_queues(priv->port) *
891                                     sizeof(u32);
892                                 schedule_delayed_work(&priv->port_periodic_work, HZ);
893                         }
894                 }
895         }
896 
897         cvm_oct_tx_initialize();
898         cvm_oct_rx_initialize();
899 
900         /*
901          * 150 uS: about 10 1500-byte packets at 1GE.
902          */
903         cvm_oct_tx_poll_interval = 150 * (octeon_get_clock_rate() / 1000000);
904 
905         schedule_delayed_work(&cvm_oct_rx_refill_work, HZ);
906 
907         return 0;
908 }
909 
910 static int cvm_oct_remove(struct platform_device *pdev)
911 {
912         int port;
913 
914         cvmx_ipd_disable();
915 
916         atomic_inc_return(&cvm_oct_poll_queue_stopping);
917         cancel_delayed_work_sync(&cvm_oct_rx_refill_work);
918 
919         cvm_oct_rx_shutdown();
920         cvm_oct_tx_shutdown();
921 
922         cvmx_pko_disable();
923 
924         /* Free the ethernet devices */
925         for (port = 0; port < TOTAL_NUMBER_OF_PORTS; port++) {
926                 if (cvm_oct_device[port]) {
927                         struct net_device *dev = cvm_oct_device[port];
928                         struct octeon_ethernet *priv = netdev_priv(dev);
929 
930                         cancel_delayed_work_sync(&priv->port_periodic_work);
931 
932                         cvm_oct_tx_shutdown_dev(dev);
933                         unregister_netdev(dev);
934                         free_netdev(dev);
935                         cvm_oct_device[port] = NULL;
936                 }
937         }
938 
939         cvmx_pko_shutdown();
940 
941         cvmx_ipd_free_ptr();
942 
943         /* Free the HW pools */
944         cvm_oct_mem_empty_fpa(CVMX_FPA_PACKET_POOL, CVMX_FPA_PACKET_POOL_SIZE,
945                               num_packet_buffers);
946         cvm_oct_mem_empty_fpa(CVMX_FPA_WQE_POOL, CVMX_FPA_WQE_POOL_SIZE,
947                               num_packet_buffers);
948         if (CVMX_FPA_OUTPUT_BUFFER_POOL != CVMX_FPA_PACKET_POOL)
949                 cvm_oct_mem_empty_fpa(CVMX_FPA_OUTPUT_BUFFER_POOL,
950                                       CVMX_FPA_OUTPUT_BUFFER_POOL_SIZE, 128);
951         return 0;
952 }
953 
954 static const struct of_device_id cvm_oct_match[] = {
955         {
956                 .compatible = "cavium,octeon-3860-pip",
957         },
958         {},
959 };
960 MODULE_DEVICE_TABLE(of, cvm_oct_match);
961 
962 static struct platform_driver cvm_oct_driver = {
963         .probe          = cvm_oct_probe,
964         .remove         = cvm_oct_remove,
965         .driver         = {
966                 .name   = KBUILD_MODNAME,
967                 .of_match_table = cvm_oct_match,
968         },
969 };
970 
971 module_platform_driver(cvm_oct_driver);
972 
973 MODULE_LICENSE("GPL");
974 MODULE_AUTHOR("Cavium Networks <support@caviumnetworks.com>");
975 MODULE_DESCRIPTION("Cavium Networks Octeon ethernet driver.");
976 

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