1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * This file is based on code from OCTEON SDK by Cavium Networks.
4 *
5 * Copyright (c) 2003-2007 Cavium Networks
6 */
7
8 #include <linux/platform_device.h>
9 #include <linux/kernel.h>
10 #include <linux/module.h>
11 #include <linux/netdevice.h>
12 #include <linux/etherdevice.h>
13 #include <linux/phy.h>
14 #include <linux/slab.h>
15 #include <linux/interrupt.h>
16 #include <linux/of_mdio.h>
17 #include <linux/of_net.h>
18 #include <linux/if_ether.h>
19 #include <linux/if_vlan.h>
20
21 #include <net/dst.h>
22
23 #include "octeon-ethernet.h"
24 #include "ethernet-defines.h"
25 #include "ethernet-mem.h"
26 #include "ethernet-rx.h"
27 #include "ethernet-tx.h"
28 #include "ethernet-mdio.h"
29 #include "ethernet-util.h"
30
31 #define OCTEON_MAX_MTU 65392
32
33 static int num_packet_buffers = 1024;
34 module_param(num_packet_buffers, int, 0444);
35 MODULE_PARM_DESC(num_packet_buffers, "\n"
36 "\tNumber of packet buffers to allocate and store in the\n"
37 "\tFPA. By default, 1024 packet buffers are used.\n");
38
39 static int pow_receive_group = 15;
40 module_param(pow_receive_group, int, 0444);
41 MODULE_PARM_DESC(pow_receive_group, "\n"
42 "\tPOW group to receive packets from. All ethernet hardware\n"
43 "\twill be configured to send incoming packets to this POW\n"
44 "\tgroup. Also any other software can submit packets to this\n"
45 "\tgroup for the kernel to process.");
46
47 static int receive_group_order;
48 module_param(receive_group_order, int, 0444);
49 MODULE_PARM_DESC(receive_group_order, "\n"
50 "\tOrder (0..4) of receive groups to take into use. Ethernet hardware\n"
51 "\twill be configured to send incoming packets to multiple POW\n"
52 "\tgroups. pow_receive_group parameter is ignored when multiple\n"
53 "\tgroups are taken into use and groups are allocated starting\n"
54 "\tfrom 0. By default, a single group is used.\n");
55
56 int pow_send_group = -1;
57 module_param(pow_send_group, int, 0644);
58 MODULE_PARM_DESC(pow_send_group, "\n"
59 "\tPOW group to send packets to other software on. This\n"
60 "\tcontrols the creation of the virtual device pow0.\n"
61 "\talways_use_pow also depends on this value.");
62
63 int always_use_pow;
64 module_param(always_use_pow, int, 0444);
65 MODULE_PARM_DESC(always_use_pow, "\n"
66 "\tWhen set, always send to the pow group. This will cause\n"
67 "\tpackets sent to real ethernet devices to be sent to the\n"
68 "\tPOW group instead of the hardware. Unless some other\n"
69 "\tapplication changes the config, packets will still be\n"
70 "\treceived from the low level hardware. Use this option\n"
71 "\tto allow a CVMX app to intercept all packets from the\n"
72 "\tlinux kernel. You must specify pow_send_group along with\n"
73 "\tthis option.");
74
75 char pow_send_list[128] = "";
76 module_param_string(pow_send_list, pow_send_list, sizeof(pow_send_list), 0444);
77 MODULE_PARM_DESC(pow_send_list, "\n"
78 "\tComma separated list of ethernet devices that should use the\n"
79 "\tPOW for transmit instead of the actual ethernet hardware. This\n"
80 "\tis a per port version of always_use_pow. always_use_pow takes\n"
81 "\tprecedence over this list. For example, setting this to\n"
82 "\t\"eth2,spi3,spi7\" would cause these three devices to transmit\n"
83 "\tusing the pow_send_group.");
84
85 int rx_napi_weight = 32;
86 module_param(rx_napi_weight, int, 0444);
87 MODULE_PARM_DESC(rx_napi_weight, "The NAPI WEIGHT parameter.");
88
89 /* Mask indicating which receive groups are in use. */
90 int pow_receive_groups;
91
92 /*
93 * cvm_oct_poll_queue_stopping - flag to indicate polling should stop.
94 *
95 * Set to one right before cvm_oct_poll_queue is destroyed.
96 */
97 atomic_t cvm_oct_poll_queue_stopping = ATOMIC_INIT(0);
98
99 /*
100 * Array of every ethernet device owned by this driver indexed by
101 * the ipd input port number.
102 */
103 struct net_device *cvm_oct_device[TOTAL_NUMBER_OF_PORTS];
104
105 u64 cvm_oct_tx_poll_interval;
106
107 static void cvm_oct_rx_refill_worker(struct work_struct *work);
108 static DECLARE_DELAYED_WORK(cvm_oct_rx_refill_work, cvm_oct_rx_refill_worker);
109
cvm_oct_rx_refill_worker(struct work_struct * work)110 static void cvm_oct_rx_refill_worker(struct work_struct *work)
111 {
112 /*
113 * FPA 0 may have been drained, try to refill it if we need
114 * more than num_packet_buffers / 2, otherwise normal receive
115 * processing will refill it. If it were drained, no packets
116 * could be received so cvm_oct_napi_poll would never be
117 * invoked to do the refill.
118 */
119 cvm_oct_rx_refill_pool(num_packet_buffers / 2);
120
121 if (!atomic_read(&cvm_oct_poll_queue_stopping))
122 schedule_delayed_work(&cvm_oct_rx_refill_work, HZ);
123 }
124
cvm_oct_periodic_worker(struct work_struct * work)125 static void cvm_oct_periodic_worker(struct work_struct *work)
126 {
127 struct octeon_ethernet *priv = container_of(work,
128 struct octeon_ethernet,
129 port_periodic_work.work);
130
131 if (priv->poll)
132 priv->poll(cvm_oct_device[priv->port]);
133
134 cvm_oct_device[priv->port]->netdev_ops->ndo_get_stats
135 (cvm_oct_device[priv->port]);
136
137 if (!atomic_read(&cvm_oct_poll_queue_stopping))
138 schedule_delayed_work(&priv->port_periodic_work, HZ);
139 }
140
cvm_oct_configure_common_hw(void)141 static void cvm_oct_configure_common_hw(void)
142 {
143 /* Setup the FPA */
144 cvmx_fpa_enable();
145 cvm_oct_mem_fill_fpa(CVMX_FPA_PACKET_POOL, CVMX_FPA_PACKET_POOL_SIZE,
146 num_packet_buffers);
147 cvm_oct_mem_fill_fpa(CVMX_FPA_WQE_POOL, CVMX_FPA_WQE_POOL_SIZE,
148 num_packet_buffers);
149 if (CVMX_FPA_OUTPUT_BUFFER_POOL != CVMX_FPA_PACKET_POOL)
150 cvm_oct_mem_fill_fpa(CVMX_FPA_OUTPUT_BUFFER_POOL,
151 CVMX_FPA_OUTPUT_BUFFER_POOL_SIZE, 1024);
152
153 #ifdef __LITTLE_ENDIAN
154 {
155 union cvmx_ipd_ctl_status ipd_ctl_status;
156
157 ipd_ctl_status.u64 = cvmx_read_csr(CVMX_IPD_CTL_STATUS);
158 ipd_ctl_status.s.pkt_lend = 1;
159 ipd_ctl_status.s.wqe_lend = 1;
160 cvmx_write_csr(CVMX_IPD_CTL_STATUS, ipd_ctl_status.u64);
161 }
162 #endif
163
164 cvmx_helper_setup_red(num_packet_buffers / 4, num_packet_buffers / 8);
165 }
166
167 /**
168 * cvm_oct_free_work- Free a work queue entry
169 *
170 * @work_queue_entry: Work queue entry to free
171 *
172 * Returns Zero on success, Negative on failure.
173 */
cvm_oct_free_work(void * work_queue_entry)174 int cvm_oct_free_work(void *work_queue_entry)
175 {
176 struct cvmx_wqe *work = work_queue_entry;
177
178 int segments = work->word2.s.bufs;
179 union cvmx_buf_ptr segment_ptr = work->packet_ptr;
180
181 while (segments--) {
182 union cvmx_buf_ptr next_ptr = *(union cvmx_buf_ptr *)
183 cvmx_phys_to_ptr(segment_ptr.s.addr - 8);
184 if (unlikely(!segment_ptr.s.i))
185 cvmx_fpa_free(cvm_oct_get_buffer_ptr(segment_ptr),
186 segment_ptr.s.pool,
187 CVMX_FPA_PACKET_POOL_SIZE / 128);
188 segment_ptr = next_ptr;
189 }
190 cvmx_fpa_free(work, CVMX_FPA_WQE_POOL, 1);
191
192 return 0;
193 }
194 EXPORT_SYMBOL(cvm_oct_free_work);
195
196 /**
197 * cvm_oct_common_get_stats - get the low level ethernet statistics
198 * @dev: Device to get the statistics from
199 *
200 * Returns Pointer to the statistics
201 */
cvm_oct_common_get_stats(struct net_device * dev)202 static struct net_device_stats *cvm_oct_common_get_stats(struct net_device *dev)
203 {
204 cvmx_pip_port_status_t rx_status;
205 cvmx_pko_port_status_t tx_status;
206 struct octeon_ethernet *priv = netdev_priv(dev);
207
208 if (priv->port < CVMX_PIP_NUM_INPUT_PORTS) {
209 if (octeon_is_simulation()) {
210 /* The simulator doesn't support statistics */
211 memset(&rx_status, 0, sizeof(rx_status));
212 memset(&tx_status, 0, sizeof(tx_status));
213 } else {
214 cvmx_pip_get_port_status(priv->port, 1, &rx_status);
215 cvmx_pko_get_port_status(priv->port, 1, &tx_status);
216 }
217
218 dev->stats.rx_packets += rx_status.inb_packets;
219 dev->stats.tx_packets += tx_status.packets;
220 dev->stats.rx_bytes += rx_status.inb_octets;
221 dev->stats.tx_bytes += tx_status.octets;
222 dev->stats.multicast += rx_status.multicast_packets;
223 dev->stats.rx_crc_errors += rx_status.inb_errors;
224 dev->stats.rx_frame_errors += rx_status.fcs_align_err_packets;
225 dev->stats.rx_dropped += rx_status.dropped_packets;
226 }
227
228 return &dev->stats;
229 }
230
231 /**
232 * cvm_oct_common_change_mtu - change the link MTU
233 * @dev: Device to change
234 * @new_mtu: The new MTU
235 *
236 * Returns Zero on success
237 */
cvm_oct_common_change_mtu(struct net_device * dev,int new_mtu)238 static int cvm_oct_common_change_mtu(struct net_device *dev, int new_mtu)
239 {
240 struct octeon_ethernet *priv = netdev_priv(dev);
241 int interface = INTERFACE(priv->port);
242 #if IS_ENABLED(CONFIG_VLAN_8021Q)
243 int vlan_bytes = VLAN_HLEN;
244 #else
245 int vlan_bytes = 0;
246 #endif
247 int mtu_overhead = ETH_HLEN + ETH_FCS_LEN + vlan_bytes;
248
249 dev->mtu = new_mtu;
250
251 if ((interface < 2) &&
252 (cvmx_helper_interface_get_mode(interface) !=
253 CVMX_HELPER_INTERFACE_MODE_SPI)) {
254 int index = INDEX(priv->port);
255 /* Add ethernet header and FCS, and VLAN if configured. */
256 int max_packet = new_mtu + mtu_overhead;
257
258 if (OCTEON_IS_MODEL(OCTEON_CN3XXX) ||
259 OCTEON_IS_MODEL(OCTEON_CN58XX)) {
260 /* Signal errors on packets larger than the MTU */
261 cvmx_write_csr(CVMX_GMXX_RXX_FRM_MAX(index, interface),
262 max_packet);
263 } else {
264 /*
265 * Set the hardware to truncate packets larger
266 * than the MTU and smaller the 64 bytes.
267 */
268 union cvmx_pip_frm_len_chkx frm_len_chk;
269
270 frm_len_chk.u64 = 0;
271 frm_len_chk.s.minlen = VLAN_ETH_ZLEN;
272 frm_len_chk.s.maxlen = max_packet;
273 cvmx_write_csr(CVMX_PIP_FRM_LEN_CHKX(interface),
274 frm_len_chk.u64);
275 }
276 /*
277 * Set the hardware to truncate packets larger than
278 * the MTU. The jabber register must be set to a
279 * multiple of 8 bytes, so round up.
280 */
281 cvmx_write_csr(CVMX_GMXX_RXX_JABBER(index, interface),
282 (max_packet + 7) & ~7u);
283 }
284 return 0;
285 }
286
287 /**
288 * cvm_oct_common_set_multicast_list - set the multicast list
289 * @dev: Device to work on
290 */
cvm_oct_common_set_multicast_list(struct net_device * dev)291 static void cvm_oct_common_set_multicast_list(struct net_device *dev)
292 {
293 union cvmx_gmxx_prtx_cfg gmx_cfg;
294 struct octeon_ethernet *priv = netdev_priv(dev);
295 int interface = INTERFACE(priv->port);
296
297 if ((interface < 2) &&
298 (cvmx_helper_interface_get_mode(interface) !=
299 CVMX_HELPER_INTERFACE_MODE_SPI)) {
300 union cvmx_gmxx_rxx_adr_ctl control;
301 int index = INDEX(priv->port);
302
303 control.u64 = 0;
304 control.s.bcst = 1; /* Allow broadcast MAC addresses */
305
306 if (!netdev_mc_empty(dev) || (dev->flags & IFF_ALLMULTI) ||
307 (dev->flags & IFF_PROMISC))
308 /* Force accept multicast packets */
309 control.s.mcst = 2;
310 else
311 /* Force reject multicast packets */
312 control.s.mcst = 1;
313
314 if (dev->flags & IFF_PROMISC)
315 /*
316 * Reject matches if promisc. Since CAM is
317 * shut off, should accept everything.
318 */
319 control.s.cam_mode = 0;
320 else
321 /* Filter packets based on the CAM */
322 control.s.cam_mode = 1;
323
324 gmx_cfg.u64 =
325 cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
326 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface),
327 gmx_cfg.u64 & ~1ull);
328
329 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CTL(index, interface),
330 control.u64);
331 if (dev->flags & IFF_PROMISC)
332 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM_EN
333 (index, interface), 0);
334 else
335 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM_EN
336 (index, interface), 1);
337
338 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface),
339 gmx_cfg.u64);
340 }
341 }
342
cvm_oct_set_mac_filter(struct net_device * dev)343 static int cvm_oct_set_mac_filter(struct net_device *dev)
344 {
345 struct octeon_ethernet *priv = netdev_priv(dev);
346 union cvmx_gmxx_prtx_cfg gmx_cfg;
347 int interface = INTERFACE(priv->port);
348
349 if ((interface < 2) &&
350 (cvmx_helper_interface_get_mode(interface) !=
351 CVMX_HELPER_INTERFACE_MODE_SPI)) {
352 int i;
353 const u8 *ptr = dev->dev_addr;
354 u64 mac = 0;
355 int index = INDEX(priv->port);
356
357 for (i = 0; i < 6; i++)
358 mac = (mac << 8) | (u64)ptr[i];
359
360 gmx_cfg.u64 =
361 cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
362 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface),
363 gmx_cfg.u64 & ~1ull);
364
365 cvmx_write_csr(CVMX_GMXX_SMACX(index, interface), mac);
366 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM0(index, interface),
367 ptr[0]);
368 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM1(index, interface),
369 ptr[1]);
370 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM2(index, interface),
371 ptr[2]);
372 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM3(index, interface),
373 ptr[3]);
374 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM4(index, interface),
375 ptr[4]);
376 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM5(index, interface),
377 ptr[5]);
378 cvm_oct_common_set_multicast_list(dev);
379 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface),
380 gmx_cfg.u64);
381 }
382 return 0;
383 }
384
385 /**
386 * cvm_oct_common_set_mac_address - set the hardware MAC address for a device
387 * @dev: The device in question.
388 * @addr: Socket address.
389 *
390 * Returns Zero on success
391 */
cvm_oct_common_set_mac_address(struct net_device * dev,void * addr)392 static int cvm_oct_common_set_mac_address(struct net_device *dev, void *addr)
393 {
394 int r = eth_mac_addr(dev, addr);
395
396 if (r)
397 return r;
398 return cvm_oct_set_mac_filter(dev);
399 }
400
401 /**
402 * cvm_oct_common_init - per network device initialization
403 * @dev: Device to initialize
404 *
405 * Returns Zero on success
406 */
cvm_oct_common_init(struct net_device * dev)407 int cvm_oct_common_init(struct net_device *dev)
408 {
409 struct octeon_ethernet *priv = netdev_priv(dev);
410 int ret;
411
412 ret = of_get_ethdev_address(priv->of_node, dev);
413 if (ret)
414 eth_hw_addr_random(dev);
415
416 /*
417 * Force the interface to use the POW send if always_use_pow
418 * was specified or it is in the pow send list.
419 */
420 if ((pow_send_group != -1) &&
421 (always_use_pow || strstr(pow_send_list, dev->name)))
422 priv->queue = -1;
423
424 if (priv->queue != -1)
425 dev->features |= NETIF_F_SG | NETIF_F_IP_CSUM;
426
427 /* We do our own locking, Linux doesn't need to */
428 dev->features |= NETIF_F_LLTX;
429 dev->ethtool_ops = &cvm_oct_ethtool_ops;
430
431 cvm_oct_set_mac_filter(dev);
432 dev_set_mtu(dev, dev->mtu);
433
434 /*
435 * Zero out stats for port so we won't mistakenly show
436 * counters from the bootloader.
437 */
438 memset(dev->netdev_ops->ndo_get_stats(dev), 0,
439 sizeof(struct net_device_stats));
440
441 if (dev->netdev_ops->ndo_stop)
442 dev->netdev_ops->ndo_stop(dev);
443
444 return 0;
445 }
446
cvm_oct_common_uninit(struct net_device * dev)447 void cvm_oct_common_uninit(struct net_device *dev)
448 {
449 if (dev->phydev)
450 phy_disconnect(dev->phydev);
451 }
452
cvm_oct_common_open(struct net_device * dev,void (* link_poll)(struct net_device *))453 int cvm_oct_common_open(struct net_device *dev,
454 void (*link_poll)(struct net_device *))
455 {
456 union cvmx_gmxx_prtx_cfg gmx_cfg;
457 struct octeon_ethernet *priv = netdev_priv(dev);
458 int interface = INTERFACE(priv->port);
459 int index = INDEX(priv->port);
460 union cvmx_helper_link_info link_info;
461 int rv;
462
463 rv = cvm_oct_phy_setup_device(dev);
464 if (rv)
465 return rv;
466
467 gmx_cfg.u64 = cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
468 gmx_cfg.s.en = 1;
469 if (octeon_has_feature(OCTEON_FEATURE_PKND))
470 gmx_cfg.s.pknd = priv->port;
471 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), gmx_cfg.u64);
472
473 if (octeon_is_simulation())
474 return 0;
475
476 if (dev->phydev) {
477 int r = phy_read_status(dev->phydev);
478
479 if (r == 0 && dev->phydev->link == 0)
480 netif_carrier_off(dev);
481 cvm_oct_adjust_link(dev);
482 } else {
483 link_info = cvmx_helper_link_get(priv->port);
484 if (!link_info.s.link_up)
485 netif_carrier_off(dev);
486 priv->poll = link_poll;
487 link_poll(dev);
488 }
489
490 return 0;
491 }
492
cvm_oct_link_poll(struct net_device * dev)493 void cvm_oct_link_poll(struct net_device *dev)
494 {
495 struct octeon_ethernet *priv = netdev_priv(dev);
496 union cvmx_helper_link_info link_info;
497
498 link_info = cvmx_helper_link_get(priv->port);
499 if (link_info.u64 == priv->link_info)
500 return;
501
502 if (cvmx_helper_link_set(priv->port, link_info))
503 link_info.u64 = priv->link_info;
504 else
505 priv->link_info = link_info.u64;
506
507 if (link_info.s.link_up) {
508 if (!netif_carrier_ok(dev))
509 netif_carrier_on(dev);
510 } else if (netif_carrier_ok(dev)) {
511 netif_carrier_off(dev);
512 }
513 cvm_oct_note_carrier(priv, link_info);
514 }
515
cvm_oct_xaui_open(struct net_device * dev)516 static int cvm_oct_xaui_open(struct net_device *dev)
517 {
518 return cvm_oct_common_open(dev, cvm_oct_link_poll);
519 }
520
521 static const struct net_device_ops cvm_oct_npi_netdev_ops = {
522 .ndo_init = cvm_oct_common_init,
523 .ndo_uninit = cvm_oct_common_uninit,
524 .ndo_start_xmit = cvm_oct_xmit,
525 .ndo_set_rx_mode = cvm_oct_common_set_multicast_list,
526 .ndo_set_mac_address = cvm_oct_common_set_mac_address,
527 .ndo_eth_ioctl = cvm_oct_ioctl,
528 .ndo_change_mtu = cvm_oct_common_change_mtu,
529 .ndo_get_stats = cvm_oct_common_get_stats,
530 #ifdef CONFIG_NET_POLL_CONTROLLER
531 .ndo_poll_controller = cvm_oct_poll_controller,
532 #endif
533 };
534
535 static const struct net_device_ops cvm_oct_xaui_netdev_ops = {
536 .ndo_init = cvm_oct_common_init,
537 .ndo_uninit = cvm_oct_common_uninit,
538 .ndo_open = cvm_oct_xaui_open,
539 .ndo_stop = cvm_oct_common_stop,
540 .ndo_start_xmit = cvm_oct_xmit,
541 .ndo_set_rx_mode = cvm_oct_common_set_multicast_list,
542 .ndo_set_mac_address = cvm_oct_common_set_mac_address,
543 .ndo_eth_ioctl = cvm_oct_ioctl,
544 .ndo_change_mtu = cvm_oct_common_change_mtu,
545 .ndo_get_stats = cvm_oct_common_get_stats,
546 #ifdef CONFIG_NET_POLL_CONTROLLER
547 .ndo_poll_controller = cvm_oct_poll_controller,
548 #endif
549 };
550
551 static const struct net_device_ops cvm_oct_sgmii_netdev_ops = {
552 .ndo_init = cvm_oct_sgmii_init,
553 .ndo_uninit = cvm_oct_common_uninit,
554 .ndo_open = cvm_oct_sgmii_open,
555 .ndo_stop = cvm_oct_common_stop,
556 .ndo_start_xmit = cvm_oct_xmit,
557 .ndo_set_rx_mode = cvm_oct_common_set_multicast_list,
558 .ndo_set_mac_address = cvm_oct_common_set_mac_address,
559 .ndo_eth_ioctl = cvm_oct_ioctl,
560 .ndo_change_mtu = cvm_oct_common_change_mtu,
561 .ndo_get_stats = cvm_oct_common_get_stats,
562 #ifdef CONFIG_NET_POLL_CONTROLLER
563 .ndo_poll_controller = cvm_oct_poll_controller,
564 #endif
565 };
566
567 static const struct net_device_ops cvm_oct_spi_netdev_ops = {
568 .ndo_init = cvm_oct_spi_init,
569 .ndo_uninit = cvm_oct_spi_uninit,
570 .ndo_start_xmit = cvm_oct_xmit,
571 .ndo_set_rx_mode = cvm_oct_common_set_multicast_list,
572 .ndo_set_mac_address = cvm_oct_common_set_mac_address,
573 .ndo_eth_ioctl = cvm_oct_ioctl,
574 .ndo_change_mtu = cvm_oct_common_change_mtu,
575 .ndo_get_stats = cvm_oct_common_get_stats,
576 #ifdef CONFIG_NET_POLL_CONTROLLER
577 .ndo_poll_controller = cvm_oct_poll_controller,
578 #endif
579 };
580
581 static const struct net_device_ops cvm_oct_rgmii_netdev_ops = {
582 .ndo_init = cvm_oct_common_init,
583 .ndo_uninit = cvm_oct_common_uninit,
584 .ndo_open = cvm_oct_rgmii_open,
585 .ndo_stop = cvm_oct_common_stop,
586 .ndo_start_xmit = cvm_oct_xmit,
587 .ndo_set_rx_mode = cvm_oct_common_set_multicast_list,
588 .ndo_set_mac_address = cvm_oct_common_set_mac_address,
589 .ndo_eth_ioctl = cvm_oct_ioctl,
590 .ndo_change_mtu = cvm_oct_common_change_mtu,
591 .ndo_get_stats = cvm_oct_common_get_stats,
592 #ifdef CONFIG_NET_POLL_CONTROLLER
593 .ndo_poll_controller = cvm_oct_poll_controller,
594 #endif
595 };
596
597 static const struct net_device_ops cvm_oct_pow_netdev_ops = {
598 .ndo_init = cvm_oct_common_init,
599 .ndo_start_xmit = cvm_oct_xmit_pow,
600 .ndo_set_rx_mode = cvm_oct_common_set_multicast_list,
601 .ndo_set_mac_address = cvm_oct_common_set_mac_address,
602 .ndo_eth_ioctl = cvm_oct_ioctl,
603 .ndo_change_mtu = cvm_oct_common_change_mtu,
604 .ndo_get_stats = cvm_oct_common_get_stats,
605 #ifdef CONFIG_NET_POLL_CONTROLLER
606 .ndo_poll_controller = cvm_oct_poll_controller,
607 #endif
608 };
609
cvm_oct_of_get_child(const struct device_node * parent,int reg_val)610 static struct device_node *cvm_oct_of_get_child
611 (const struct device_node *parent, int reg_val)
612 {
613 struct device_node *node;
614 const __be32 *addr;
615 int size;
616
617 for_each_child_of_node(parent, node) {
618 addr = of_get_property(node, "reg", &size);
619 if (addr && (be32_to_cpu(*addr) == reg_val))
620 break;
621 }
622 return node;
623 }
624
cvm_oct_node_for_port(struct device_node * pip,int interface,int port)625 static struct device_node *cvm_oct_node_for_port(struct device_node *pip,
626 int interface, int port)
627 {
628 struct device_node *ni, *np;
629
630 ni = cvm_oct_of_get_child(pip, interface);
631 if (!ni)
632 return NULL;
633
634 np = cvm_oct_of_get_child(ni, port);
635 of_node_put(ni);
636
637 return np;
638 }
639
cvm_set_rgmii_delay(struct octeon_ethernet * priv,int iface,int port)640 static void cvm_set_rgmii_delay(struct octeon_ethernet *priv, int iface,
641 int port)
642 {
643 struct device_node *np = priv->of_node;
644 u32 delay_value;
645 bool rx_delay;
646 bool tx_delay;
647
648 /* By default, both RX/TX delay is enabled in
649 * __cvmx_helper_rgmii_enable().
650 */
651 rx_delay = true;
652 tx_delay = true;
653
654 if (!of_property_read_u32(np, "rx-delay", &delay_value)) {
655 cvmx_write_csr(CVMX_ASXX_RX_CLK_SETX(port, iface), delay_value);
656 rx_delay = delay_value > 0;
657 }
658 if (!of_property_read_u32(np, "tx-delay", &delay_value)) {
659 cvmx_write_csr(CVMX_ASXX_TX_CLK_SETX(port, iface), delay_value);
660 tx_delay = delay_value > 0;
661 }
662
663 if (!rx_delay && !tx_delay)
664 priv->phy_mode = PHY_INTERFACE_MODE_RGMII_ID;
665 else if (!rx_delay)
666 priv->phy_mode = PHY_INTERFACE_MODE_RGMII_RXID;
667 else if (!tx_delay)
668 priv->phy_mode = PHY_INTERFACE_MODE_RGMII_TXID;
669 else
670 priv->phy_mode = PHY_INTERFACE_MODE_RGMII;
671 }
672
cvm_oct_probe(struct platform_device * pdev)673 static int cvm_oct_probe(struct platform_device *pdev)
674 {
675 int num_interfaces;
676 int interface;
677 int fau = FAU_NUM_PACKET_BUFFERS_TO_FREE;
678 int qos;
679 struct device_node *pip;
680 int mtu_overhead = ETH_HLEN + ETH_FCS_LEN;
681
682 #if IS_ENABLED(CONFIG_VLAN_8021Q)
683 mtu_overhead += VLAN_HLEN;
684 #endif
685
686 pip = pdev->dev.of_node;
687 if (!pip) {
688 pr_err("Error: No 'pip' in /aliases\n");
689 return -EINVAL;
690 }
691
692 cvm_oct_configure_common_hw();
693
694 cvmx_helper_initialize_packet_io_global();
695
696 if (receive_group_order) {
697 if (receive_group_order > 4)
698 receive_group_order = 4;
699 pow_receive_groups = (1 << (1 << receive_group_order)) - 1;
700 } else {
701 pow_receive_groups = BIT(pow_receive_group);
702 }
703
704 /* Change the input group for all ports before input is enabled */
705 num_interfaces = cvmx_helper_get_number_of_interfaces();
706 for (interface = 0; interface < num_interfaces; interface++) {
707 int num_ports = cvmx_helper_ports_on_interface(interface);
708 int port;
709
710 for (port = cvmx_helper_get_ipd_port(interface, 0);
711 port < cvmx_helper_get_ipd_port(interface, num_ports);
712 port++) {
713 union cvmx_pip_prt_tagx pip_prt_tagx;
714
715 pip_prt_tagx.u64 =
716 cvmx_read_csr(CVMX_PIP_PRT_TAGX(port));
717
718 if (receive_group_order) {
719 int tag_mask;
720
721 /* We support only 16 groups at the moment, so
722 * always disable the two additional "hidden"
723 * tag_mask bits on CN68XX.
724 */
725 if (OCTEON_IS_MODEL(OCTEON_CN68XX))
726 pip_prt_tagx.u64 |= 0x3ull << 44;
727
728 tag_mask = ~((1 << receive_group_order) - 1);
729 pip_prt_tagx.s.grptagbase = 0;
730 pip_prt_tagx.s.grptagmask = tag_mask;
731 pip_prt_tagx.s.grptag = 1;
732 pip_prt_tagx.s.tag_mode = 0;
733 pip_prt_tagx.s.inc_prt_flag = 1;
734 pip_prt_tagx.s.ip6_dprt_flag = 1;
735 pip_prt_tagx.s.ip4_dprt_flag = 1;
736 pip_prt_tagx.s.ip6_sprt_flag = 1;
737 pip_prt_tagx.s.ip4_sprt_flag = 1;
738 pip_prt_tagx.s.ip6_dst_flag = 1;
739 pip_prt_tagx.s.ip4_dst_flag = 1;
740 pip_prt_tagx.s.ip6_src_flag = 1;
741 pip_prt_tagx.s.ip4_src_flag = 1;
742 pip_prt_tagx.s.grp = 0;
743 } else {
744 pip_prt_tagx.s.grptag = 0;
745 pip_prt_tagx.s.grp = pow_receive_group;
746 }
747
748 cvmx_write_csr(CVMX_PIP_PRT_TAGX(port),
749 pip_prt_tagx.u64);
750 }
751 }
752
753 cvmx_helper_ipd_and_packet_input_enable();
754
755 memset(cvm_oct_device, 0, sizeof(cvm_oct_device));
756
757 /*
758 * Initialize the FAU used for counting packet buffers that
759 * need to be freed.
760 */
761 cvmx_fau_atomic_write32(FAU_NUM_PACKET_BUFFERS_TO_FREE, 0);
762
763 /* Initialize the FAU used for counting tx SKBs that need to be freed */
764 cvmx_fau_atomic_write32(FAU_TOTAL_TX_TO_CLEAN, 0);
765
766 if ((pow_send_group != -1)) {
767 struct net_device *dev;
768
769 dev = alloc_etherdev(sizeof(struct octeon_ethernet));
770 if (dev) {
771 /* Initialize the device private structure. */
772 struct octeon_ethernet *priv = netdev_priv(dev);
773
774 SET_NETDEV_DEV(dev, &pdev->dev);
775 dev->netdev_ops = &cvm_oct_pow_netdev_ops;
776 priv->imode = CVMX_HELPER_INTERFACE_MODE_DISABLED;
777 priv->port = CVMX_PIP_NUM_INPUT_PORTS;
778 priv->queue = -1;
779 strscpy(dev->name, "pow%d", sizeof(dev->name));
780 for (qos = 0; qos < 16; qos++)
781 skb_queue_head_init(&priv->tx_free_list[qos]);
782 dev->min_mtu = VLAN_ETH_ZLEN - mtu_overhead;
783 dev->max_mtu = OCTEON_MAX_MTU - mtu_overhead;
784
785 if (register_netdev(dev) < 0) {
786 pr_err("Failed to register ethernet device for POW\n");
787 free_netdev(dev);
788 } else {
789 cvm_oct_device[CVMX_PIP_NUM_INPUT_PORTS] = dev;
790 pr_info("%s: POW send group %d, receive group %d\n",
791 dev->name, pow_send_group,
792 pow_receive_group);
793 }
794 } else {
795 pr_err("Failed to allocate ethernet device for POW\n");
796 }
797 }
798
799 num_interfaces = cvmx_helper_get_number_of_interfaces();
800 for (interface = 0; interface < num_interfaces; interface++) {
801 cvmx_helper_interface_mode_t imode =
802 cvmx_helper_interface_get_mode(interface);
803 int num_ports = cvmx_helper_ports_on_interface(interface);
804 int port;
805 int port_index;
806
807 for (port_index = 0,
808 port = cvmx_helper_get_ipd_port(interface, 0);
809 port < cvmx_helper_get_ipd_port(interface, num_ports);
810 port_index++, port++) {
811 struct octeon_ethernet *priv;
812 struct net_device *dev =
813 alloc_etherdev(sizeof(struct octeon_ethernet));
814 if (!dev) {
815 pr_err("Failed to allocate ethernet device for port %d\n",
816 port);
817 continue;
818 }
819
820 /* Initialize the device private structure. */
821 SET_NETDEV_DEV(dev, &pdev->dev);
822 priv = netdev_priv(dev);
823 priv->netdev = dev;
824 priv->of_node = cvm_oct_node_for_port(pip, interface,
825 port_index);
826
827 INIT_DELAYED_WORK(&priv->port_periodic_work,
828 cvm_oct_periodic_worker);
829 priv->imode = imode;
830 priv->port = port;
831 priv->queue = cvmx_pko_get_base_queue(priv->port);
832 priv->fau = fau - cvmx_pko_get_num_queues(port) * 4;
833 priv->phy_mode = PHY_INTERFACE_MODE_NA;
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 dev->min_mtu = VLAN_ETH_ZLEN - mtu_overhead;
840 dev->max_mtu = OCTEON_MAX_MTU - mtu_overhead;
841
842 switch (priv->imode) {
843 /* These types don't support ports to IPD/PKO */
844 case CVMX_HELPER_INTERFACE_MODE_DISABLED:
845 case CVMX_HELPER_INTERFACE_MODE_PCIE:
846 case CVMX_HELPER_INTERFACE_MODE_PICMG:
847 break;
848
849 case CVMX_HELPER_INTERFACE_MODE_NPI:
850 dev->netdev_ops = &cvm_oct_npi_netdev_ops;
851 strscpy(dev->name, "npi%d", sizeof(dev->name));
852 break;
853
854 case CVMX_HELPER_INTERFACE_MODE_XAUI:
855 dev->netdev_ops = &cvm_oct_xaui_netdev_ops;
856 strscpy(dev->name, "xaui%d", sizeof(dev->name));
857 break;
858
859 case CVMX_HELPER_INTERFACE_MODE_LOOP:
860 dev->netdev_ops = &cvm_oct_npi_netdev_ops;
861 strscpy(dev->name, "loop%d", sizeof(dev->name));
862 break;
863
864 case CVMX_HELPER_INTERFACE_MODE_SGMII:
865 priv->phy_mode = PHY_INTERFACE_MODE_SGMII;
866 dev->netdev_ops = &cvm_oct_sgmii_netdev_ops;
867 strscpy(dev->name, "eth%d", sizeof(dev->name));
868 break;
869
870 case CVMX_HELPER_INTERFACE_MODE_SPI:
871 dev->netdev_ops = &cvm_oct_spi_netdev_ops;
872 strscpy(dev->name, "spi%d", sizeof(dev->name));
873 break;
874
875 case CVMX_HELPER_INTERFACE_MODE_GMII:
876 priv->phy_mode = PHY_INTERFACE_MODE_GMII;
877 dev->netdev_ops = &cvm_oct_rgmii_netdev_ops;
878 strscpy(dev->name, "eth%d", sizeof(dev->name));
879 break;
880
881 case CVMX_HELPER_INTERFACE_MODE_RGMII:
882 dev->netdev_ops = &cvm_oct_rgmii_netdev_ops;
883 strscpy(dev->name, "eth%d", sizeof(dev->name));
884 cvm_set_rgmii_delay(priv, interface,
885 port_index);
886 break;
887 }
888
889 if (priv->of_node && of_phy_is_fixed_link(priv->of_node)) {
890 if (of_phy_register_fixed_link(priv->of_node)) {
891 netdev_err(dev, "Failed to register fixed link for interface %d, port %d\n",
892 interface, priv->port);
893 dev->netdev_ops = NULL;
894 }
895 }
896
897 if (!dev->netdev_ops) {
898 free_netdev(dev);
899 } else if (register_netdev(dev) < 0) {
900 pr_err("Failed to register ethernet device for interface %d, port %d\n",
901 interface, priv->port);
902 free_netdev(dev);
903 } else {
904 cvm_oct_device[priv->port] = dev;
905 fau -=
906 cvmx_pko_get_num_queues(priv->port) *
907 sizeof(u32);
908 schedule_delayed_work(&priv->port_periodic_work,
909 HZ);
910 }
911 }
912 }
913
914 cvm_oct_tx_initialize();
915 cvm_oct_rx_initialize();
916
917 /*
918 * 150 uS: about 10 1500-byte packets at 1GE.
919 */
920 cvm_oct_tx_poll_interval = 150 * (octeon_get_clock_rate() / 1000000);
921
922 schedule_delayed_work(&cvm_oct_rx_refill_work, HZ);
923
924 return 0;
925 }
926
cvm_oct_remove(struct platform_device * pdev)927 static void cvm_oct_remove(struct platform_device *pdev)
928 {
929 int port;
930
931 cvmx_ipd_disable();
932
933 atomic_inc_return(&cvm_oct_poll_queue_stopping);
934 cancel_delayed_work_sync(&cvm_oct_rx_refill_work);
935
936 cvm_oct_rx_shutdown();
937 cvm_oct_tx_shutdown();
938
939 cvmx_pko_disable();
940
941 /* Free the ethernet devices */
942 for (port = 0; port < TOTAL_NUMBER_OF_PORTS; port++) {
943 if (cvm_oct_device[port]) {
944 struct net_device *dev = cvm_oct_device[port];
945 struct octeon_ethernet *priv = netdev_priv(dev);
946
947 cancel_delayed_work_sync(&priv->port_periodic_work);
948
949 cvm_oct_tx_shutdown_dev(dev);
950 unregister_netdev(dev);
951 free_netdev(dev);
952 cvm_oct_device[port] = NULL;
953 }
954 }
955
956 cvmx_pko_shutdown();
957
958 cvmx_ipd_free_ptr();
959
960 /* Free the HW pools */
961 cvm_oct_mem_empty_fpa(CVMX_FPA_PACKET_POOL, CVMX_FPA_PACKET_POOL_SIZE,
962 num_packet_buffers);
963 cvm_oct_mem_empty_fpa(CVMX_FPA_WQE_POOL, CVMX_FPA_WQE_POOL_SIZE,
964 num_packet_buffers);
965 if (CVMX_FPA_OUTPUT_BUFFER_POOL != CVMX_FPA_PACKET_POOL)
966 cvm_oct_mem_empty_fpa(CVMX_FPA_OUTPUT_BUFFER_POOL,
967 CVMX_FPA_OUTPUT_BUFFER_POOL_SIZE, 128);
968 }
969
970 static const struct of_device_id cvm_oct_match[] = {
971 {
972 .compatible = "cavium,octeon-3860-pip",
973 },
974 {},
975 };
976 MODULE_DEVICE_TABLE(of, cvm_oct_match);
977
978 static struct platform_driver cvm_oct_driver = {
979 .probe = cvm_oct_probe,
980 .remove_new = cvm_oct_remove,
981 .driver = {
982 .name = KBUILD_MODNAME,
983 .of_match_table = cvm_oct_match,
984 },
985 };
986
987 module_platform_driver(cvm_oct_driver);
988
989 MODULE_SOFTDEP("pre: mdio-cavium");
990 MODULE_LICENSE("GPL");
991 MODULE_AUTHOR("Cavium Networks <support@caviumnetworks.com>");
992 MODULE_DESCRIPTION("Cavium Networks Octeon ethernet driver.");
993
