Version:  2.0.40 2.2.26 2.4.37 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 4.10

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         dev->mtu = new_mtu;
263 
264         if ((interface < 2) &&
265             (cvmx_helper_interface_get_mode(interface) !=
266                 CVMX_HELPER_INTERFACE_MODE_SPI)) {
267                 int index = INDEX(priv->port);
268                 /* Add ethernet header and FCS, and VLAN if configured. */
269                 int max_packet = new_mtu + mtu_overhead;
270 
271                 if (OCTEON_IS_MODEL(OCTEON_CN3XXX) ||
272                     OCTEON_IS_MODEL(OCTEON_CN58XX)) {
273                         /* Signal errors on packets larger than the MTU */
274                         cvmx_write_csr(CVMX_GMXX_RXX_FRM_MAX(index, interface),
275                                        max_packet);
276                 } else {
277                         /*
278                          * Set the hardware to truncate packets larger
279                          * than the MTU and smaller the 64 bytes.
280                          */
281                         union cvmx_pip_frm_len_chkx frm_len_chk;
282 
283                         frm_len_chk.u64 = 0;
284                         frm_len_chk.s.minlen = VLAN_ETH_ZLEN;
285                         frm_len_chk.s.maxlen = max_packet;
286                         cvmx_write_csr(CVMX_PIP_FRM_LEN_CHKX(interface),
287                                        frm_len_chk.u64);
288                 }
289                 /*
290                  * Set the hardware to truncate packets larger than
291                  * the MTU. The jabber register must be set to a
292                  * multiple of 8 bytes, so round up.
293                  */
294                 cvmx_write_csr(CVMX_GMXX_RXX_JABBER(index, interface),
295                                (max_packet + 7) & ~7u);
296         }
297         return 0;
298 }
299 
300 /**
301  * cvm_oct_common_set_multicast_list - set the multicast list
302  * @dev:    Device to work on
303  */
304 static void cvm_oct_common_set_multicast_list(struct net_device *dev)
305 {
306         union cvmx_gmxx_prtx_cfg gmx_cfg;
307         struct octeon_ethernet *priv = netdev_priv(dev);
308         int interface = INTERFACE(priv->port);
309 
310         if ((interface < 2) &&
311             (cvmx_helper_interface_get_mode(interface) !=
312                 CVMX_HELPER_INTERFACE_MODE_SPI)) {
313                 union cvmx_gmxx_rxx_adr_ctl control;
314                 int index = INDEX(priv->port);
315 
316                 control.u64 = 0;
317                 control.s.bcst = 1;     /* Allow broadcast MAC addresses */
318 
319                 if (!netdev_mc_empty(dev) || (dev->flags & IFF_ALLMULTI) ||
320                     (dev->flags & IFF_PROMISC))
321                         /* Force accept multicast packets */
322                         control.s.mcst = 2;
323                 else
324                         /* Force reject multicast packets */
325                         control.s.mcst = 1;
326 
327                 if (dev->flags & IFF_PROMISC)
328                         /*
329                          * Reject matches if promisc. Since CAM is
330                          * shut off, should accept everything.
331                          */
332                         control.s.cam_mode = 0;
333                 else
334                         /* Filter packets based on the CAM */
335                         control.s.cam_mode = 1;
336 
337                 gmx_cfg.u64 =
338                     cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
339                 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface),
340                                gmx_cfg.u64 & ~1ull);
341 
342                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CTL(index, interface),
343                                control.u64);
344                 if (dev->flags & IFF_PROMISC)
345                         cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM_EN
346                                        (index, interface), 0);
347                 else
348                         cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM_EN
349                                        (index, interface), 1);
350 
351                 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface),
352                                gmx_cfg.u64);
353         }
354 }
355 
356 static int cvm_oct_set_mac_filter(struct net_device *dev)
357 {
358         struct octeon_ethernet *priv = netdev_priv(dev);
359         union cvmx_gmxx_prtx_cfg gmx_cfg;
360         int interface = INTERFACE(priv->port);
361 
362         if ((interface < 2) &&
363             (cvmx_helper_interface_get_mode(interface) !=
364                 CVMX_HELPER_INTERFACE_MODE_SPI)) {
365                 int i;
366                 u8 *ptr = dev->dev_addr;
367                 u64 mac = 0;
368                 int index = INDEX(priv->port);
369 
370                 for (i = 0; i < 6; i++)
371                         mac = (mac << 8) | (u64)ptr[i];
372 
373                 gmx_cfg.u64 =
374                     cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
375                 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface),
376                                gmx_cfg.u64 & ~1ull);
377 
378                 cvmx_write_csr(CVMX_GMXX_SMACX(index, interface), mac);
379                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM0(index, interface),
380                                ptr[0]);
381                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM1(index, interface),
382                                ptr[1]);
383                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM2(index, interface),
384                                ptr[2]);
385                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM3(index, interface),
386                                ptr[3]);
387                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM4(index, interface),
388                                ptr[4]);
389                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM5(index, interface),
390                                ptr[5]);
391                 cvm_oct_common_set_multicast_list(dev);
392                 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface),
393                                gmx_cfg.u64);
394         }
395         return 0;
396 }
397 
398 /**
399  * cvm_oct_common_set_mac_address - set the hardware MAC address for a device
400  * @dev:    The device in question.
401  * @addr:   Socket address.
402  *
403  * Returns Zero on success
404  */
405 static int cvm_oct_common_set_mac_address(struct net_device *dev, void *addr)
406 {
407         int r = eth_mac_addr(dev, addr);
408 
409         if (r)
410                 return r;
411         return cvm_oct_set_mac_filter(dev);
412 }
413 
414 /**
415  * cvm_oct_common_init - per network device initialization
416  * @dev:    Device to initialize
417  *
418  * Returns Zero on success
419  */
420 int cvm_oct_common_init(struct net_device *dev)
421 {
422         struct octeon_ethernet *priv = netdev_priv(dev);
423         const u8 *mac = NULL;
424 
425         if (priv->of_node)
426                 mac = of_get_mac_address(priv->of_node);
427 
428         if (mac)
429                 ether_addr_copy(dev->dev_addr, mac);
430         else
431                 eth_hw_addr_random(dev);
432 
433         /*
434          * Force the interface to use the POW send if always_use_pow
435          * was specified or it is in the pow send list.
436          */
437         if ((pow_send_group != -1) &&
438             (always_use_pow || strstr(pow_send_list, dev->name)))
439                 priv->queue = -1;
440 
441         if (priv->queue != -1)
442                 dev->features |= NETIF_F_SG | NETIF_F_IP_CSUM;
443 
444         /* We do our own locking, Linux doesn't need to */
445         dev->features |= NETIF_F_LLTX;
446         dev->ethtool_ops = &cvm_oct_ethtool_ops;
447 
448         cvm_oct_set_mac_filter(dev);
449         dev_set_mtu(dev, dev->mtu);
450 
451         /*
452          * Zero out stats for port so we won't mistakenly show
453          * counters from the bootloader.
454          */
455         memset(dev->netdev_ops->ndo_get_stats(dev), 0,
456                sizeof(struct net_device_stats));
457 
458         if (dev->netdev_ops->ndo_stop)
459                 dev->netdev_ops->ndo_stop(dev);
460 
461         return 0;
462 }
463 
464 void cvm_oct_common_uninit(struct net_device *dev)
465 {
466         if (dev->phydev)
467                 phy_disconnect(dev->phydev);
468 }
469 
470 int cvm_oct_common_open(struct net_device *dev,
471                         void (*link_poll)(struct net_device *))
472 {
473         union cvmx_gmxx_prtx_cfg gmx_cfg;
474         struct octeon_ethernet *priv = netdev_priv(dev);
475         int interface = INTERFACE(priv->port);
476         int index = INDEX(priv->port);
477         cvmx_helper_link_info_t link_info;
478         int rv;
479 
480         rv = cvm_oct_phy_setup_device(dev);
481         if (rv)
482                 return rv;
483 
484         gmx_cfg.u64 = cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
485         gmx_cfg.s.en = 1;
486         if (octeon_has_feature(OCTEON_FEATURE_PKND))
487                 gmx_cfg.s.pknd = priv->port;
488         cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), gmx_cfg.u64);
489 
490         if (octeon_is_simulation())
491                 return 0;
492 
493         if (dev->phydev) {
494                 int r = phy_read_status(dev->phydev);
495 
496                 if (r == 0 && dev->phydev->link == 0)
497                         netif_carrier_off(dev);
498                 cvm_oct_adjust_link(dev);
499         } else {
500                 link_info = cvmx_helper_link_get(priv->port);
501                 if (!link_info.s.link_up)
502                         netif_carrier_off(dev);
503                 priv->poll = link_poll;
504                 link_poll(dev);
505         }
506 
507         return 0;
508 }
509 
510 void cvm_oct_link_poll(struct net_device *dev)
511 {
512         struct octeon_ethernet *priv = netdev_priv(dev);
513         cvmx_helper_link_info_t link_info;
514 
515         link_info = cvmx_helper_link_get(priv->port);
516         if (link_info.u64 == priv->link_info)
517                 return;
518 
519         if (cvmx_helper_link_set(priv->port, link_info))
520                 link_info.u64 = priv->link_info;
521         else
522                 priv->link_info = link_info.u64;
523 
524         if (link_info.s.link_up) {
525                 if (!netif_carrier_ok(dev))
526                         netif_carrier_on(dev);
527         } else if (netif_carrier_ok(dev)) {
528                 netif_carrier_off(dev);
529         }
530         cvm_oct_note_carrier(priv, link_info);
531 }
532 
533 static int cvm_oct_xaui_open(struct net_device *dev)
534 {
535         return cvm_oct_common_open(dev, cvm_oct_link_poll);
536 }
537 
538 static const struct net_device_ops cvm_oct_npi_netdev_ops = {
539         .ndo_init               = cvm_oct_common_init,
540         .ndo_uninit             = cvm_oct_common_uninit,
541         .ndo_start_xmit         = cvm_oct_xmit,
542         .ndo_set_rx_mode        = cvm_oct_common_set_multicast_list,
543         .ndo_set_mac_address    = cvm_oct_common_set_mac_address,
544         .ndo_do_ioctl           = cvm_oct_ioctl,
545         .ndo_change_mtu         = cvm_oct_common_change_mtu,
546         .ndo_get_stats          = cvm_oct_common_get_stats,
547 #ifdef CONFIG_NET_POLL_CONTROLLER
548         .ndo_poll_controller    = cvm_oct_poll_controller,
549 #endif
550 };
551 
552 static const struct net_device_ops cvm_oct_xaui_netdev_ops = {
553         .ndo_init               = cvm_oct_common_init,
554         .ndo_uninit             = cvm_oct_common_uninit,
555         .ndo_open               = cvm_oct_xaui_open,
556         .ndo_stop               = cvm_oct_common_stop,
557         .ndo_start_xmit         = cvm_oct_xmit,
558         .ndo_set_rx_mode        = cvm_oct_common_set_multicast_list,
559         .ndo_set_mac_address    = cvm_oct_common_set_mac_address,
560         .ndo_do_ioctl           = cvm_oct_ioctl,
561         .ndo_change_mtu         = cvm_oct_common_change_mtu,
562         .ndo_get_stats          = cvm_oct_common_get_stats,
563 #ifdef CONFIG_NET_POLL_CONTROLLER
564         .ndo_poll_controller    = cvm_oct_poll_controller,
565 #endif
566 };
567 
568 static const struct net_device_ops cvm_oct_sgmii_netdev_ops = {
569         .ndo_init               = cvm_oct_sgmii_init,
570         .ndo_uninit             = cvm_oct_common_uninit,
571         .ndo_open               = cvm_oct_sgmii_open,
572         .ndo_stop               = cvm_oct_common_stop,
573         .ndo_start_xmit         = cvm_oct_xmit,
574         .ndo_set_rx_mode        = cvm_oct_common_set_multicast_list,
575         .ndo_set_mac_address    = cvm_oct_common_set_mac_address,
576         .ndo_do_ioctl           = cvm_oct_ioctl,
577         .ndo_change_mtu         = cvm_oct_common_change_mtu,
578         .ndo_get_stats          = cvm_oct_common_get_stats,
579 #ifdef CONFIG_NET_POLL_CONTROLLER
580         .ndo_poll_controller    = cvm_oct_poll_controller,
581 #endif
582 };
583 
584 static const struct net_device_ops cvm_oct_spi_netdev_ops = {
585         .ndo_init               = cvm_oct_spi_init,
586         .ndo_uninit             = cvm_oct_spi_uninit,
587         .ndo_start_xmit         = cvm_oct_xmit,
588         .ndo_set_rx_mode        = cvm_oct_common_set_multicast_list,
589         .ndo_set_mac_address    = cvm_oct_common_set_mac_address,
590         .ndo_do_ioctl           = cvm_oct_ioctl,
591         .ndo_change_mtu         = cvm_oct_common_change_mtu,
592         .ndo_get_stats          = cvm_oct_common_get_stats,
593 #ifdef CONFIG_NET_POLL_CONTROLLER
594         .ndo_poll_controller    = cvm_oct_poll_controller,
595 #endif
596 };
597 
598 static const struct net_device_ops cvm_oct_rgmii_netdev_ops = {
599         .ndo_init               = cvm_oct_common_init,
600         .ndo_uninit             = cvm_oct_common_uninit,
601         .ndo_open               = cvm_oct_rgmii_open,
602         .ndo_stop               = cvm_oct_common_stop,
603         .ndo_start_xmit         = cvm_oct_xmit,
604         .ndo_set_rx_mode        = cvm_oct_common_set_multicast_list,
605         .ndo_set_mac_address    = cvm_oct_common_set_mac_address,
606         .ndo_do_ioctl           = cvm_oct_ioctl,
607         .ndo_change_mtu         = cvm_oct_common_change_mtu,
608         .ndo_get_stats          = cvm_oct_common_get_stats,
609 #ifdef CONFIG_NET_POLL_CONTROLLER
610         .ndo_poll_controller    = cvm_oct_poll_controller,
611 #endif
612 };
613 
614 static const struct net_device_ops cvm_oct_pow_netdev_ops = {
615         .ndo_init               = cvm_oct_common_init,
616         .ndo_start_xmit         = cvm_oct_xmit_pow,
617         .ndo_set_rx_mode        = cvm_oct_common_set_multicast_list,
618         .ndo_set_mac_address    = cvm_oct_common_set_mac_address,
619         .ndo_do_ioctl           = cvm_oct_ioctl,
620         .ndo_change_mtu         = cvm_oct_common_change_mtu,
621         .ndo_get_stats          = cvm_oct_common_get_stats,
622 #ifdef CONFIG_NET_POLL_CONTROLLER
623         .ndo_poll_controller    = cvm_oct_poll_controller,
624 #endif
625 };
626 
627 static struct device_node *cvm_oct_of_get_child(
628                                 const struct device_node *parent, int reg_val)
629 {
630         struct device_node *node = NULL;
631         int size;
632         const __be32 *addr;
633 
634         for (;;) {
635                 node = of_get_next_child(parent, node);
636                 if (!node)
637                         break;
638                 addr = of_get_property(node, "reg", &size);
639                 if (addr && (be32_to_cpu(*addr) == reg_val))
640                         break;
641         }
642         return node;
643 }
644 
645 static struct device_node *cvm_oct_node_for_port(struct device_node *pip,
646                                                  int interface, int port)
647 {
648         struct device_node *ni, *np;
649 
650         ni = cvm_oct_of_get_child(pip, interface);
651         if (!ni)
652                 return NULL;
653 
654         np = cvm_oct_of_get_child(ni, port);
655         of_node_put(ni);
656 
657         return np;
658 }
659 
660 static void cvm_set_rgmii_delay(struct device_node *np, int iface, int port)
661 {
662         u32 delay_value;
663 
664         if (!of_property_read_u32(np, "rx-delay", &delay_value))
665                 cvmx_write_csr(CVMX_ASXX_RX_CLK_SETX(port, iface), delay_value);
666         if (!of_property_read_u32(np, "tx-delay", &delay_value))
667                 cvmx_write_csr(CVMX_ASXX_TX_CLK_SETX(port, iface), delay_value);
668 }
669 
670 static int cvm_oct_probe(struct platform_device *pdev)
671 {
672         int num_interfaces;
673         int interface;
674         int fau = FAU_NUM_PACKET_BUFFERS_TO_FREE;
675         int qos;
676         struct device_node *pip;
677         int mtu_overhead = ETH_HLEN + ETH_FCS_LEN;
678 
679 #if IS_ENABLED(CONFIG_VLAN_8021Q)
680         mtu_overhead += VLAN_HLEN;
681 #endif
682 
683         octeon_mdiobus_force_mod_depencency();
684 
685         pip = pdev->dev.of_node;
686         if (!pip) {
687                 pr_err("Error: No 'pip' in /aliases\n");
688                 return -EINVAL;
689         }
690 
691         cvm_oct_configure_common_hw();
692 
693         cvmx_helper_initialize_packet_io_global();
694 
695         if (receive_group_order) {
696                 if (receive_group_order > 4)
697                         receive_group_order = 4;
698                 pow_receive_groups = (1 << (1 << receive_group_order)) - 1;
699         } else {
700                 pow_receive_groups = BIT(pow_receive_group);
701         }
702 
703         /* Change the input group for all ports before input is enabled */
704         num_interfaces = cvmx_helper_get_number_of_interfaces();
705         for (interface = 0; interface < num_interfaces; interface++) {
706                 int num_ports = cvmx_helper_ports_on_interface(interface);
707                 int port;
708 
709                 for (port = cvmx_helper_get_ipd_port(interface, 0);
710                      port < cvmx_helper_get_ipd_port(interface, num_ports);
711                      port++) {
712                         union cvmx_pip_prt_tagx pip_prt_tagx;
713 
714                         pip_prt_tagx.u64 =
715                             cvmx_read_csr(CVMX_PIP_PRT_TAGX(port));
716 
717                         if (receive_group_order) {
718                                 int tag_mask;
719 
720                                 /* We support only 16 groups at the moment, so
721                                  * always disable the two additional "hidden"
722                                  * tag_mask bits on CN68XX.
723                                  */
724                                 if (OCTEON_IS_MODEL(OCTEON_CN68XX))
725                                         pip_prt_tagx.u64 |= 0x3ull << 44;
726 
727                                 tag_mask = ~((1 << receive_group_order) - 1);
728                                 pip_prt_tagx.s.grptagbase       = 0;
729                                 pip_prt_tagx.s.grptagmask       = tag_mask;
730                                 pip_prt_tagx.s.grptag           = 1;
731                                 pip_prt_tagx.s.tag_mode         = 0;
732                                 pip_prt_tagx.s.inc_prt_flag     = 1;
733                                 pip_prt_tagx.s.ip6_dprt_flag    = 1;
734                                 pip_prt_tagx.s.ip4_dprt_flag    = 1;
735                                 pip_prt_tagx.s.ip6_sprt_flag    = 1;
736                                 pip_prt_tagx.s.ip4_sprt_flag    = 1;
737                                 pip_prt_tagx.s.ip6_dst_flag     = 1;
738                                 pip_prt_tagx.s.ip4_dst_flag     = 1;
739                                 pip_prt_tagx.s.ip6_src_flag     = 1;
740                                 pip_prt_tagx.s.ip4_src_flag     = 1;
741                                 pip_prt_tagx.s.grp              = 0;
742                         } else {
743                                 pip_prt_tagx.s.grptag   = 0;
744                                 pip_prt_tagx.s.grp      = pow_receive_group;
745                         }
746 
747                         cvmx_write_csr(CVMX_PIP_PRT_TAGX(port),
748                                        pip_prt_tagx.u64);
749                 }
750         }
751 
752         cvmx_helper_ipd_and_packet_input_enable();
753 
754         memset(cvm_oct_device, 0, sizeof(cvm_oct_device));
755 
756         /*
757          * Initialize the FAU used for counting packet buffers that
758          * need to be freed.
759          */
760         cvmx_fau_atomic_write32(FAU_NUM_PACKET_BUFFERS_TO_FREE, 0);
761 
762         /* Initialize the FAU used for counting tx SKBs that need to be freed */
763         cvmx_fau_atomic_write32(FAU_TOTAL_TX_TO_CLEAN, 0);
764 
765         if ((pow_send_group != -1)) {
766                 struct net_device *dev;
767 
768                 dev = alloc_etherdev(sizeof(struct octeon_ethernet));
769                 if (dev) {
770                         /* Initialize the device private structure. */
771                         struct octeon_ethernet *priv = netdev_priv(dev);
772 
773                         SET_NETDEV_DEV(dev, &pdev->dev);
774                         dev->netdev_ops = &cvm_oct_pow_netdev_ops;
775                         priv->imode = CVMX_HELPER_INTERFACE_MODE_DISABLED;
776                         priv->port = CVMX_PIP_NUM_INPUT_PORTS;
777                         priv->queue = -1;
778                         strcpy(dev->name, "pow%d");
779                         for (qos = 0; qos < 16; qos++)
780                                 skb_queue_head_init(&priv->tx_free_list[qos]);
781                         dev->min_mtu = VLAN_ETH_ZLEN - mtu_overhead;
782                         dev->max_mtu = OCTEON_MAX_MTU - mtu_overhead;
783 
784                         if (register_netdev(dev) < 0) {
785                                 pr_err("Failed to register ethernet device for POW\n");
786                                 free_netdev(dev);
787                         } else {
788                                 cvm_oct_device[CVMX_PIP_NUM_INPUT_PORTS] = dev;
789                                 pr_info("%s: POW send group %d, receive group %d\n",
790                                         dev->name, pow_send_group,
791                                         pow_receive_group);
792                         }
793                 } else {
794                         pr_err("Failed to allocate ethernet device for POW\n");
795                 }
796         }
797 
798         num_interfaces = cvmx_helper_get_number_of_interfaces();
799         for (interface = 0; interface < num_interfaces; interface++) {
800                 cvmx_helper_interface_mode_t imode =
801                     cvmx_helper_interface_get_mode(interface);
802                 int num_ports = cvmx_helper_ports_on_interface(interface);
803                 int port;
804                 int port_index;
805 
806                 for (port_index = 0,
807                      port = cvmx_helper_get_ipd_port(interface, 0);
808                      port < cvmx_helper_get_ipd_port(interface, num_ports);
809                      port_index++, port++) {
810                         struct octeon_ethernet *priv;
811                         struct net_device *dev =
812                             alloc_etherdev(sizeof(struct octeon_ethernet));
813                         if (!dev) {
814                                 pr_err("Failed to allocate ethernet device for port %d\n",
815                                        port);
816                                 continue;
817                         }
818 
819                         /* Initialize the device private structure. */
820                         SET_NETDEV_DEV(dev, &pdev->dev);
821                         priv = netdev_priv(dev);
822                         priv->netdev = dev;
823                         priv->of_node = cvm_oct_node_for_port(pip, interface,
824                                                                 port_index);
825 
826                         INIT_DELAYED_WORK(&priv->port_periodic_work,
827                                           cvm_oct_periodic_worker);
828                         priv->imode = imode;
829                         priv->port = port;
830                         priv->queue = cvmx_pko_get_base_queue(priv->port);
831                         priv->fau = fau - cvmx_pko_get_num_queues(port) * 4;
832                         for (qos = 0; qos < 16; qos++)
833                                 skb_queue_head_init(&priv->tx_free_list[qos]);
834                         for (qos = 0; qos < cvmx_pko_get_num_queues(port);
835                              qos++)
836                                 cvmx_fau_atomic_write32(priv->fau + qos * 4, 0);
837                         dev->min_mtu = VLAN_ETH_ZLEN - mtu_overhead;
838                         dev->max_mtu = OCTEON_MAX_MTU - mtu_overhead;
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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