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mic: vop: Fix use-after-free on remove
[linux/fpc-iii.git] / drivers / staging / octeon / ethernet.c
blobce61c5670ef645c78e080ab588b0d75c7591378c
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_net.h>
17 #include <linux/if_ether.h>
18 #include <linux/if_vlan.h>
19
20 #include <net/dst.h>
21
22 #include <asm/octeon/octeon.h>
23
24 #include "ethernet-defines.h"
25 #include "octeon-ethernet.h"
26 #include "ethernet-mem.h"
27 #include "ethernet-rx.h"
28 #include "ethernet-tx.h"
29 #include "ethernet-mdio.h"
30 #include "ethernet-util.h"
31
32 #include <asm/octeon/cvmx-pip.h>
33 #include <asm/octeon/cvmx-pko.h>
34 #include <asm/octeon/cvmx-fau.h>
35 #include <asm/octeon/cvmx-ipd.h>
36 #include <asm/octeon/cvmx-helper.h>
37 #include <asm/octeon/cvmx-asxx-defs.h>
38 #include <asm/octeon/cvmx-gmxx-defs.h>
39
40 #define OCTEON_MAX_MTU 65392
41
42 static int num_packet_buffers = 1024;
43 module_param(num_packet_buffers, int, 0444);
44 MODULE_PARM_DESC(num_packet_buffers, "\n"
45 "\tNumber of packet buffers to allocate and store in the\n"
46 "\tFPA. By default, 1024 packet buffers are used.\n");
47
48 static int pow_receive_group = 15;
49 module_param(pow_receive_group, int, 0444);
50 MODULE_PARM_DESC(pow_receive_group, "\n"
51 "\tPOW group to receive packets from. All ethernet hardware\n"
52 "\twill be configured to send incoming packets to this POW\n"
53 "\tgroup. Also any other software can submit packets to this\n"
54 "\tgroup for the kernel to process.");
55
56 static int receive_group_order;
57 module_param(receive_group_order, int, 0444);
58 MODULE_PARM_DESC(receive_group_order, "\n"
59 "\tOrder (0..4) of receive groups to take into use. Ethernet hardware\n"
60 "\twill be configured to send incoming packets to multiple POW\n"
61 "\tgroups. pow_receive_group parameter is ignored when multiple\n"
62 "\tgroups are taken into use and groups are allocated starting\n"
63 "\tfrom 0. By default, a single group is used.\n");
64
65 int pow_send_group = -1;
66 module_param(pow_send_group, int, 0644);
67 MODULE_PARM_DESC(pow_send_group, "\n"
68 "\tPOW group to send packets to other software on. This\n"
69 "\tcontrols the creation of the virtual device pow0.\n"
70 "\talways_use_pow also depends on this value.");
71
72 int always_use_pow;
73 module_param(always_use_pow, int, 0444);
74 MODULE_PARM_DESC(always_use_pow, "\n"
75 "\tWhen set, always send to the pow group. This will cause\n"
76 "\tpackets sent to real ethernet devices to be sent to the\n"
77 "\tPOW group instead of the hardware. Unless some other\n"
78 "\tapplication changes the config, packets will still be\n"
79 "\treceived from the low level hardware. Use this option\n"
80 "\tto allow a CVMX app to intercept all packets from the\n"
81 "\tlinux kernel. You must specify pow_send_group along with\n"
82 "\tthis option.");
83
84 char pow_send_list[128] = "";
85 module_param_string(pow_send_list, pow_send_list, sizeof(pow_send_list), 0444);
86 MODULE_PARM_DESC(pow_send_list, "\n"
87 "\tComma separated list of ethernet devices that should use the\n"
88 "\tPOW for transmit instead of the actual ethernet hardware. This\n"
89 "\tis a per port version of always_use_pow. always_use_pow takes\n"
90 "\tprecedence over this list. For example, setting this to\n"
91 "\t\"eth2,spi3,spi7\" would cause these three devices to transmit\n"
92 "\tusing the pow_send_group.");
93
94 int rx_napi_weight = 32;
95 module_param(rx_napi_weight, int, 0444);
96 MODULE_PARM_DESC(rx_napi_weight, "The NAPI WEIGHT parameter.");
97
98 /* Mask indicating which receive groups are in use. */
99 int pow_receive_groups;
100
101 /*
102 * cvm_oct_poll_queue_stopping - flag to indicate polling should stop.
103 *
104 * Set to one right before cvm_oct_poll_queue is destroyed.
105 */
106 atomic_t cvm_oct_poll_queue_stopping = ATOMIC_INIT(0);
107
108 /*
109 * Array of every ethernet device owned by this driver indexed by
110 * the ipd input port number.
111 */
112 struct net_device *cvm_oct_device[TOTAL_NUMBER_OF_PORTS];
113
114 u64 cvm_oct_tx_poll_interval;
115
116 static void cvm_oct_rx_refill_worker(struct work_struct *work);
117 static DECLARE_DELAYED_WORK(cvm_oct_rx_refill_work, cvm_oct_rx_refill_worker);
118
119 static void cvm_oct_rx_refill_worker(struct work_struct *work)
120 {
121 /*
122 * FPA 0 may have been drained, try to refill it if we need
123 * more than num_packet_buffers / 2, otherwise normal receive
124 * processing will refill it. If it were drained, no packets
125 * could be received so cvm_oct_napi_poll would never be
126 * invoked to do the refill.
127 */
128 cvm_oct_rx_refill_pool(num_packet_buffers / 2);
129
130 if (!atomic_read(&cvm_oct_poll_queue_stopping))
131 schedule_delayed_work(&cvm_oct_rx_refill_work, HZ);
132 }
133
134 static void cvm_oct_periodic_worker(struct work_struct *work)
135 {
136 struct octeon_ethernet *priv = container_of(work,
137 struct octeon_ethernet,
138 port_periodic_work.work);
139
140 if (priv->poll)
141 priv->poll(cvm_oct_device[priv->port]);
142
143 cvm_oct_device[priv->port]->netdev_ops->ndo_get_stats
144 (cvm_oct_device[priv->port]);
145
146 if (!atomic_read(&cvm_oct_poll_queue_stopping))
147 schedule_delayed_work(&priv->port_periodic_work, HZ);
148 }
149
150 static void cvm_oct_configure_common_hw(void)
151 {
152 /* Setup the FPA */
153 cvmx_fpa_enable();
154 cvm_oct_mem_fill_fpa(CVMX_FPA_PACKET_POOL, CVMX_FPA_PACKET_POOL_SIZE,
155 num_packet_buffers);
156 cvm_oct_mem_fill_fpa(CVMX_FPA_WQE_POOL, CVMX_FPA_WQE_POOL_SIZE,
157 num_packet_buffers);
158 if (CVMX_FPA_OUTPUT_BUFFER_POOL != CVMX_FPA_PACKET_POOL)
159 cvm_oct_mem_fill_fpa(CVMX_FPA_OUTPUT_BUFFER_POOL,
160 CVMX_FPA_OUTPUT_BUFFER_POOL_SIZE, 1024);
161
162 #ifdef __LITTLE_ENDIAN
163 {
164 union cvmx_ipd_ctl_status ipd_ctl_status;
165
166 ipd_ctl_status.u64 = cvmx_read_csr(CVMX_IPD_CTL_STATUS);
167 ipd_ctl_status.s.pkt_lend = 1;
168 ipd_ctl_status.s.wqe_lend = 1;
169 cvmx_write_csr(CVMX_IPD_CTL_STATUS, ipd_ctl_status.u64);
170 }
171 #endif
172
173 cvmx_helper_setup_red(num_packet_buffers / 4, num_packet_buffers / 8);
174 }
175
176 /**
177 * cvm_oct_free_work- Free a work queue entry
178 *
179 * @work_queue_entry: Work queue entry to free
180 *
181 * Returns Zero on success, Negative on failure.
182 */
183 int cvm_oct_free_work(void *work_queue_entry)
184 {
185 cvmx_wqe_t *work = work_queue_entry;
186
187 int segments = work->word2.s.bufs;
188 union cvmx_buf_ptr segment_ptr = work->packet_ptr;
189
190 while (segments--) {
191 union cvmx_buf_ptr next_ptr = *(union cvmx_buf_ptr *)
192 cvmx_phys_to_ptr(segment_ptr.s.addr - 8);
193 if (unlikely(!segment_ptr.s.i))
194 cvmx_fpa_free(cvm_oct_get_buffer_ptr(segment_ptr),
195 segment_ptr.s.pool,
196 CVMX_FPA_PACKET_POOL_SIZE / 128);
197 segment_ptr = next_ptr;
198 }
199 cvmx_fpa_free(work, CVMX_FPA_WQE_POOL, 1);
200
201 return 0;
202 }
203 EXPORT_SYMBOL(cvm_oct_free_work);
204
205 /**
206 * cvm_oct_common_get_stats - get the low level ethernet statistics
207 * @dev: Device to get the statistics from
208 *
209 * Returns Pointer to the statistics
210 */
211 static struct net_device_stats *cvm_oct_common_get_stats(struct net_device *dev)
212 {
213 cvmx_pip_port_status_t rx_status;
214 cvmx_pko_port_status_t tx_status;
215 struct octeon_ethernet *priv = netdev_priv(dev);
216
217 if (priv->port < CVMX_PIP_NUM_INPUT_PORTS) {
218 if (octeon_is_simulation()) {
219 /* The simulator doesn't support statistics */
220 memset(&rx_status, 0, sizeof(rx_status));
221 memset(&tx_status, 0, sizeof(tx_status));
222 } else {
223 cvmx_pip_get_port_status(priv->port, 1, &rx_status);
224 cvmx_pko_get_port_status(priv->port, 1, &tx_status);
225 }
226
227 dev->stats.rx_packets += rx_status.inb_packets;
228 dev->stats.tx_packets += tx_status.packets;
229 dev->stats.rx_bytes += rx_status.inb_octets;
230 dev->stats.tx_bytes += tx_status.octets;
231 dev->stats.multicast += rx_status.multicast_packets;
232 dev->stats.rx_crc_errors += rx_status.inb_errors;
233 dev->stats.rx_frame_errors += rx_status.fcs_align_err_packets;
234 dev->stats.rx_dropped += rx_status.dropped_packets;
235 }
236
237 return &dev->stats;
238 }
239
240 /**
241 * cvm_oct_common_change_mtu - change the link MTU
242 * @dev: Device to change
243 * @new_mtu: The new MTU
244 *
245 * Returns Zero on success
246 */
247 static int cvm_oct_common_change_mtu(struct net_device *dev, int new_mtu)
248 {
249 struct octeon_ethernet *priv = netdev_priv(dev);
250 int interface = INTERFACE(priv->port);
251 #if IS_ENABLED(CONFIG_VLAN_8021Q)
252 int vlan_bytes = VLAN_HLEN;
253 #else
254 int vlan_bytes = 0;
255 #endif
256 int mtu_overhead = ETH_HLEN + ETH_FCS_LEN + vlan_bytes;
257
258 dev->mtu = new_mtu;
259
260 if ((interface < 2) &&
261 (cvmx_helper_interface_get_mode(interface) !=
262 CVMX_HELPER_INTERFACE_MODE_SPI)) {
263 int index = INDEX(priv->port);
264 /* Add ethernet header and FCS, and VLAN if configured. */
265 int max_packet = new_mtu + mtu_overhead;
266
267 if (OCTEON_IS_MODEL(OCTEON_CN3XXX) ||
268 OCTEON_IS_MODEL(OCTEON_CN58XX)) {
269 /* Signal errors on packets larger than the MTU */
270 cvmx_write_csr(CVMX_GMXX_RXX_FRM_MAX(index, interface),
271 max_packet);
272 } else {
273 /*
274 * Set the hardware to truncate packets larger
275 * than the MTU and smaller the 64 bytes.
276 */
277 union cvmx_pip_frm_len_chkx frm_len_chk;
278
279 frm_len_chk.u64 = 0;
280 frm_len_chk.s.minlen = VLAN_ETH_ZLEN;
281 frm_len_chk.s.maxlen = max_packet;
282 cvmx_write_csr(CVMX_PIP_FRM_LEN_CHKX(interface),
283 frm_len_chk.u64);
284 }
285 /*
286 * Set the hardware to truncate packets larger than
287 * the MTU. The jabber register must be set to a
288 * multiple of 8 bytes, so round up.
289 */
290 cvmx_write_csr(CVMX_GMXX_RXX_JABBER(index, interface),
291 (max_packet + 7) & ~7u);
292 }
293 return 0;
294 }
295
296 /**
297 * cvm_oct_common_set_multicast_list - set the multicast list
298 * @dev: Device to work on
299 */
300 static void cvm_oct_common_set_multicast_list(struct net_device *dev)
301 {
302 union cvmx_gmxx_prtx_cfg gmx_cfg;
303 struct octeon_ethernet *priv = netdev_priv(dev);
304 int interface = INTERFACE(priv->port);
305
306 if ((interface < 2) &&
307 (cvmx_helper_interface_get_mode(interface) !=
308 CVMX_HELPER_INTERFACE_MODE_SPI)) {
309 union cvmx_gmxx_rxx_adr_ctl control;
310 int index = INDEX(priv->port);
311
312 control.u64 = 0;
313 control.s.bcst = 1; /* Allow broadcast MAC addresses */
314
315 if (!netdev_mc_empty(dev) || (dev->flags & IFF_ALLMULTI) ||
316 (dev->flags & IFF_PROMISC))
317 /* Force accept multicast packets */
318 control.s.mcst = 2;
319 else
320 /* Force reject multicast packets */
321 control.s.mcst = 1;
322
323 if (dev->flags & IFF_PROMISC)
324 /*
325 * Reject matches if promisc. Since CAM is
326 * shut off, should accept everything.
327 */
328 control.s.cam_mode = 0;
329 else
330 /* Filter packets based on the CAM */
331 control.s.cam_mode = 1;
332
333 gmx_cfg.u64 =
334 cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
335 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface),
336 gmx_cfg.u64 & ~1ull);
337
338 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CTL(index, interface),
339 control.u64);
340 if (dev->flags & IFF_PROMISC)
341 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM_EN
342 (index, interface), 0);
343 else
344 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM_EN
345 (index, interface), 1);
346
347 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface),
348 gmx_cfg.u64);
349 }
350 }
351
352 static int cvm_oct_set_mac_filter(struct net_device *dev)
353 {
354 struct octeon_ethernet *priv = netdev_priv(dev);
355 union cvmx_gmxx_prtx_cfg gmx_cfg;
356 int interface = INTERFACE(priv->port);
357
358 if ((interface < 2) &&
359 (cvmx_helper_interface_get_mode(interface) !=
360 CVMX_HELPER_INTERFACE_MODE_SPI)) {
361 int i;
362 u8 *ptr = dev->dev_addr;
363 u64 mac = 0;
364 int index = INDEX(priv->port);
365
366 for (i = 0; i < 6; i++)
367 mac = (mac << 8) | (u64)ptr[i];
368
369 gmx_cfg.u64 =
370 cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
371 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface),
372 gmx_cfg.u64 & ~1ull);
373
374 cvmx_write_csr(CVMX_GMXX_SMACX(index, interface), mac);
375 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM0(index, interface),
376 ptr[0]);
377 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM1(index, interface),
378 ptr[1]);
379 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM2(index, interface),
380 ptr[2]);
381 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM3(index, interface),
382 ptr[3]);
383 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM4(index, interface),
384 ptr[4]);
385 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM5(index, interface),
386 ptr[5]);
387 cvm_oct_common_set_multicast_list(dev);
388 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface),
389 gmx_cfg.u64);
390 }
391 return 0;
392 }
393
394 /**
395 * cvm_oct_common_set_mac_address - set the hardware MAC address for a device
396 * @dev: The device in question.
397 * @addr: Socket address.
398 *
399 * Returns Zero on success
400 */
401 static int cvm_oct_common_set_mac_address(struct net_device *dev, void *addr)
402 {
403 int r = eth_mac_addr(dev, addr);
404
405 if (r)
406 return r;
407 return cvm_oct_set_mac_filter(dev);
408 }
409
410 /**
411 * cvm_oct_common_init - per network device initialization
412 * @dev: Device to initialize
413 *
414 * Returns Zero on success
415 */
416 int cvm_oct_common_init(struct net_device *dev)
417 {
418 struct octeon_ethernet *priv = netdev_priv(dev);
419 const u8 *mac = NULL;
420
421 if (priv->of_node)
422 mac = of_get_mac_address(priv->of_node);
423
424 if (mac)
425 ether_addr_copy(dev->dev_addr, mac);
426 else
427 eth_hw_addr_random(dev);
428
429 /*
430 * Force the interface to use the POW send if always_use_pow
431 * was specified or it is in the pow send list.
432 */
433 if ((pow_send_group != -1) &&
434 (always_use_pow || strstr(pow_send_list, dev->name)))
435 priv->queue = -1;
436
437 if (priv->queue != -1)
438 dev->features |= NETIF_F_SG | NETIF_F_IP_CSUM;
439
440 /* We do our own locking, Linux doesn't need to */
441 dev->features |= NETIF_F_LLTX;
442 dev->ethtool_ops = &cvm_oct_ethtool_ops;
443
444 cvm_oct_set_mac_filter(dev);
445 dev_set_mtu(dev, dev->mtu);
446
447 /*
448 * Zero out stats for port so we won't mistakenly show
449 * counters from the bootloader.
450 */
451 memset(dev->netdev_ops->ndo_get_stats(dev), 0,
452 sizeof(struct net_device_stats));
453
454 if (dev->netdev_ops->ndo_stop)
455 dev->netdev_ops->ndo_stop(dev);
456
457 return 0;
458 }
459
460 void cvm_oct_common_uninit(struct net_device *dev)
461 {
462 if (dev->phydev)
463 phy_disconnect(dev->phydev);
464 }
465
466 int cvm_oct_common_open(struct net_device *dev,
467 void (*link_poll)(struct net_device *))
468 {
469 union cvmx_gmxx_prtx_cfg gmx_cfg;
470 struct octeon_ethernet *priv = netdev_priv(dev);
471 int interface = INTERFACE(priv->port);
472 int index = INDEX(priv->port);
473 cvmx_helper_link_info_t link_info;
474 int rv;
475
476 rv = cvm_oct_phy_setup_device(dev);
477 if (rv)
478 return rv;
479
480 gmx_cfg.u64 = cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
481 gmx_cfg.s.en = 1;
482 if (octeon_has_feature(OCTEON_FEATURE_PKND))
483 gmx_cfg.s.pknd = priv->port;
484 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), gmx_cfg.u64);
485
486 if (octeon_is_simulation())
487 return 0;
488
489 if (dev->phydev) {
490 int r = phy_read_status(dev->phydev);
491
492 if (r == 0 && dev->phydev->link == 0)
493 netif_carrier_off(dev);
494 cvm_oct_adjust_link(dev);
495 } else {
496 link_info = cvmx_helper_link_get(priv->port);
497 if (!link_info.s.link_up)
498 netif_carrier_off(dev);
499 priv->poll = link_poll;
500 link_poll(dev);
501 }
502
503 return 0;
504 }
505
506 void cvm_oct_link_poll(struct net_device *dev)
507 {
508 struct octeon_ethernet *priv = netdev_priv(dev);
509 cvmx_helper_link_info_t link_info;
510
511 link_info = cvmx_helper_link_get(priv->port);
512 if (link_info.u64 == priv->link_info)
513 return;
514
515 if (cvmx_helper_link_set(priv->port, link_info))
516 link_info.u64 = priv->link_info;
517 else
518 priv->link_info = link_info.u64;
519
520 if (link_info.s.link_up) {
521 if (!netif_carrier_ok(dev))
522 netif_carrier_on(dev);
523 } else if (netif_carrier_ok(dev)) {
524 netif_carrier_off(dev);
525 }
526 cvm_oct_note_carrier(priv, link_info);
527 }
528
529 static int cvm_oct_xaui_open(struct net_device *dev)
530 {
531 return cvm_oct_common_open(dev, cvm_oct_link_poll);
532 }
533
534 static const struct net_device_ops cvm_oct_npi_netdev_ops = {
535 .ndo_init = cvm_oct_common_init,
536 .ndo_uninit = cvm_oct_common_uninit,
537 .ndo_start_xmit = cvm_oct_xmit,
538 .ndo_set_rx_mode = cvm_oct_common_set_multicast_list,
539 .ndo_set_mac_address = cvm_oct_common_set_mac_address,
540 .ndo_do_ioctl = cvm_oct_ioctl,
541 .ndo_change_mtu = cvm_oct_common_change_mtu,
542 .ndo_get_stats = cvm_oct_common_get_stats,
543 #ifdef CONFIG_NET_POLL_CONTROLLER
544 .ndo_poll_controller = cvm_oct_poll_controller,
545 #endif
546 };
547
548 static const struct net_device_ops cvm_oct_xaui_netdev_ops = {
549 .ndo_init = cvm_oct_common_init,
550 .ndo_uninit = cvm_oct_common_uninit,
551 .ndo_open = cvm_oct_xaui_open,
552 .ndo_stop = cvm_oct_common_stop,
553 .ndo_start_xmit = cvm_oct_xmit,
554 .ndo_set_rx_mode = cvm_oct_common_set_multicast_list,
555 .ndo_set_mac_address = cvm_oct_common_set_mac_address,
556 .ndo_do_ioctl = cvm_oct_ioctl,
557 .ndo_change_mtu = cvm_oct_common_change_mtu,
558 .ndo_get_stats = cvm_oct_common_get_stats,
559 #ifdef CONFIG_NET_POLL_CONTROLLER
560 .ndo_poll_controller = cvm_oct_poll_controller,
561 #endif
562 };
563
564 static const struct net_device_ops cvm_oct_sgmii_netdev_ops = {
565 .ndo_init = cvm_oct_sgmii_init,
566 .ndo_uninit = cvm_oct_common_uninit,
567 .ndo_open = cvm_oct_sgmii_open,
568 .ndo_stop = cvm_oct_common_stop,
569 .ndo_start_xmit = cvm_oct_xmit,
570 .ndo_set_rx_mode = cvm_oct_common_set_multicast_list,
571 .ndo_set_mac_address = cvm_oct_common_set_mac_address,
572 .ndo_do_ioctl = cvm_oct_ioctl,
573 .ndo_change_mtu = cvm_oct_common_change_mtu,
574 .ndo_get_stats = cvm_oct_common_get_stats,
575 #ifdef CONFIG_NET_POLL_CONTROLLER
576 .ndo_poll_controller = cvm_oct_poll_controller,
577 #endif
578 };
579
580 static const struct net_device_ops cvm_oct_spi_netdev_ops = {
581 .ndo_init = cvm_oct_spi_init,
582 .ndo_uninit = cvm_oct_spi_uninit,
583 .ndo_start_xmit = cvm_oct_xmit,
584 .ndo_set_rx_mode = cvm_oct_common_set_multicast_list,
585 .ndo_set_mac_address = cvm_oct_common_set_mac_address,
586 .ndo_do_ioctl = cvm_oct_ioctl,
587 .ndo_change_mtu = cvm_oct_common_change_mtu,
588 .ndo_get_stats = cvm_oct_common_get_stats,
589 #ifdef CONFIG_NET_POLL_CONTROLLER
590 .ndo_poll_controller = cvm_oct_poll_controller,
591 #endif
592 };
593
594 static const struct net_device_ops cvm_oct_rgmii_netdev_ops = {
595 .ndo_init = cvm_oct_common_init,
596 .ndo_uninit = cvm_oct_common_uninit,
597 .ndo_open = cvm_oct_rgmii_open,
598 .ndo_stop = cvm_oct_common_stop,
599 .ndo_start_xmit = cvm_oct_xmit,
600 .ndo_set_rx_mode = cvm_oct_common_set_multicast_list,
601 .ndo_set_mac_address = cvm_oct_common_set_mac_address,
602 .ndo_do_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
610 static const struct net_device_ops cvm_oct_pow_netdev_ops = {
611 .ndo_init = cvm_oct_common_init,
612 .ndo_start_xmit = cvm_oct_xmit_pow,
613 .ndo_set_rx_mode = cvm_oct_common_set_multicast_list,
614 .ndo_set_mac_address = cvm_oct_common_set_mac_address,
615 .ndo_do_ioctl = cvm_oct_ioctl,
616 .ndo_change_mtu = cvm_oct_common_change_mtu,
617 .ndo_get_stats = cvm_oct_common_get_stats,
618 #ifdef CONFIG_NET_POLL_CONTROLLER
619 .ndo_poll_controller = cvm_oct_poll_controller,
620 #endif
621 };
622
623 static struct device_node *cvm_oct_of_get_child
624 (const struct device_node *parent, int reg_val)
625 {
626 struct device_node *node = NULL;
627 int size;
628 const __be32 *addr;
629
630 for (;;) {
631 node = of_get_next_child(parent, node);
632 if (!node)
633 break;
634 addr = of_get_property(node, "reg", &size);
635 if (addr && (be32_to_cpu(*addr) == reg_val))
636 break;
637 }
638 return node;
639 }
640
641 static struct device_node *cvm_oct_node_for_port(struct device_node *pip,
642 int interface, int port)
643 {
644 struct device_node *ni, *np;
645
646 ni = cvm_oct_of_get_child(pip, interface);
647 if (!ni)
648 return NULL;
649
650 np = cvm_oct_of_get_child(ni, port);
651 of_node_put(ni);
652
653 return np;
654 }
655
656 static void cvm_set_rgmii_delay(struct device_node *np, int iface, int port)
657 {
658 u32 delay_value;
659
660 if (!of_property_read_u32(np, "rx-delay", &delay_value))
661 cvmx_write_csr(CVMX_ASXX_RX_CLK_SETX(port, iface), delay_value);
662 if (!of_property_read_u32(np, "tx-delay", &delay_value))
663 cvmx_write_csr(CVMX_ASXX_TX_CLK_SETX(port, iface), delay_value);
664 }
665
666 static int cvm_oct_probe(struct platform_device *pdev)
667 {
668 int num_interfaces;
669 int interface;
670 int fau = FAU_NUM_PACKET_BUFFERS_TO_FREE;
671 int qos;
672 struct device_node *pip;
673 int mtu_overhead = ETH_HLEN + ETH_FCS_LEN;
674
675 #if IS_ENABLED(CONFIG_VLAN_8021Q)
676 mtu_overhead += VLAN_HLEN;
677 #endif
678
679 octeon_mdiobus_force_mod_depencency();
680
681 pip = pdev->dev.of_node;
682 if (!pip) {
683 pr_err("Error: No 'pip' in /aliases\n");
684 return -EINVAL;
685 }
686
687 cvm_oct_configure_common_hw();
688
689 cvmx_helper_initialize_packet_io_global();
690
691 if (receive_group_order) {
692 if (receive_group_order > 4)
693 receive_group_order = 4;
694 pow_receive_groups = (1 << (1 << receive_group_order)) - 1;
695 } else {
696 pow_receive_groups = BIT(pow_receive_group);
697 }
698
699 /* Change the input group for all ports before input is enabled */
700 num_interfaces = cvmx_helper_get_number_of_interfaces();
701 for (interface = 0; interface < num_interfaces; interface++) {
702 int num_ports = cvmx_helper_ports_on_interface(interface);
703 int port;
704
705 for (port = cvmx_helper_get_ipd_port(interface, 0);
706 port < cvmx_helper_get_ipd_port(interface, num_ports);
707 port++) {
708 union cvmx_pip_prt_tagx pip_prt_tagx;
709
710 pip_prt_tagx.u64 =
711 cvmx_read_csr(CVMX_PIP_PRT_TAGX(port));
712
713 if (receive_group_order) {
714 int tag_mask;
715
716 /* We support only 16 groups at the moment, so
717 * always disable the two additional "hidden"
718 * tag_mask bits on CN68XX.
719 */
720 if (OCTEON_IS_MODEL(OCTEON_CN68XX))
721 pip_prt_tagx.u64 |= 0x3ull << 44;
722
723 tag_mask = ~((1 << receive_group_order) - 1);
724 pip_prt_tagx.s.grptagbase = 0;
725 pip_prt_tagx.s.grptagmask = tag_mask;
726 pip_prt_tagx.s.grptag = 1;
727 pip_prt_tagx.s.tag_mode = 0;
728 pip_prt_tagx.s.inc_prt_flag = 1;
729 pip_prt_tagx.s.ip6_dprt_flag = 1;
730 pip_prt_tagx.s.ip4_dprt_flag = 1;
731 pip_prt_tagx.s.ip6_sprt_flag = 1;
732 pip_prt_tagx.s.ip4_sprt_flag = 1;
733 pip_prt_tagx.s.ip6_dst_flag = 1;
734 pip_prt_tagx.s.ip4_dst_flag = 1;
735 pip_prt_tagx.s.ip6_src_flag = 1;
736 pip_prt_tagx.s.ip4_src_flag = 1;
737 pip_prt_tagx.s.grp = 0;
738 } else {
739 pip_prt_tagx.s.grptag = 0;
740 pip_prt_tagx.s.grp = pow_receive_group;
741 }
742
743 cvmx_write_csr(CVMX_PIP_PRT_TAGX(port),
744 pip_prt_tagx.u64);
745 }
746 }
747
748 cvmx_helper_ipd_and_packet_input_enable();
749
750 memset(cvm_oct_device, 0, sizeof(cvm_oct_device));
751
752 /*
753 * Initialize the FAU used for counting packet buffers that
754 * need to be freed.
755 */
756 cvmx_fau_atomic_write32(FAU_NUM_PACKET_BUFFERS_TO_FREE, 0);
757
758 /* Initialize the FAU used for counting tx SKBs that need to be freed */
759 cvmx_fau_atomic_write32(FAU_TOTAL_TX_TO_CLEAN, 0);
760
761 if ((pow_send_group != -1)) {
762 struct net_device *dev;
763
764 dev = alloc_etherdev(sizeof(struct octeon_ethernet));
765 if (dev) {
766 /* Initialize the device private structure. */
767 struct octeon_ethernet *priv = netdev_priv(dev);
768
769 SET_NETDEV_DEV(dev, &pdev->dev);
770 dev->netdev_ops = &cvm_oct_pow_netdev_ops;
771 priv->imode = CVMX_HELPER_INTERFACE_MODE_DISABLED;
772 priv->port = CVMX_PIP_NUM_INPUT_PORTS;
773 priv->queue = -1;
774 strcpy(dev->name, "pow%d");
775 for (qos = 0; qos < 16; qos++)
776 skb_queue_head_init(&priv->tx_free_list[qos]);
777 dev->min_mtu = VLAN_ETH_ZLEN - mtu_overhead;
778 dev->max_mtu = OCTEON_MAX_MTU - mtu_overhead;
779
780 if (register_netdev(dev) < 0) {
781 pr_err("Failed to register ethernet device for POW\n");
782 free_netdev(dev);
783 } else {
784 cvm_oct_device[CVMX_PIP_NUM_INPUT_PORTS] = dev;
785 pr_info("%s: POW send group %d, receive group %d\n",
786 dev->name, pow_send_group,
787 pow_receive_group);
788 }
789 } else {
790 pr_err("Failed to allocate ethernet device for POW\n");
791 }
792 }
793
794 num_interfaces = cvmx_helper_get_number_of_interfaces();
795 for (interface = 0; interface < num_interfaces; interface++) {
796 cvmx_helper_interface_mode_t imode =
797 cvmx_helper_interface_get_mode(interface);
798 int num_ports = cvmx_helper_ports_on_interface(interface);
799 int port;
800 int port_index;
801
802 for (port_index = 0,
803 port = cvmx_helper_get_ipd_port(interface, 0);
804 port < cvmx_helper_get_ipd_port(interface, num_ports);
805 port_index++, port++) {
806 struct octeon_ethernet *priv;
807 struct net_device *dev =
808 alloc_etherdev(sizeof(struct octeon_ethernet));
809 if (!dev) {
810 pr_err("Failed to allocate ethernet device for port %d\n",
811 port);
812 continue;
813 }
814
815 /* Initialize the device private structure. */
816 SET_NETDEV_DEV(dev, &pdev->dev);
817 priv = netdev_priv(dev);
818 priv->netdev = dev;
819 priv->of_node = cvm_oct_node_for_port(pip, interface,
820 port_index);
821
822 INIT_DELAYED_WORK(&priv->port_periodic_work,
823 cvm_oct_periodic_worker);
824 priv->imode = imode;
825 priv->port = port;
826 priv->queue = cvmx_pko_get_base_queue(priv->port);
827 priv->fau = fau - cvmx_pko_get_num_queues(port) * 4;
828 for (qos = 0; qos < 16; qos++)
829 skb_queue_head_init(&priv->tx_free_list[qos]);
830 for (qos = 0; qos < cvmx_pko_get_num_queues(port);
831 qos++)
832 cvmx_fau_atomic_write32(priv->fau + qos * 4, 0);
833 dev->min_mtu = VLAN_ETH_ZLEN - mtu_overhead;
834 dev->max_mtu = OCTEON_MAX_MTU - mtu_overhead;
835
836 switch (priv->imode) {
837 /* These types don't support ports to IPD/PKO */
838 case CVMX_HELPER_INTERFACE_MODE_DISABLED:
839 case CVMX_HELPER_INTERFACE_MODE_PCIE:
840 case CVMX_HELPER_INTERFACE_MODE_PICMG:
841 break;
842
843 case CVMX_HELPER_INTERFACE_MODE_NPI:
844 dev->netdev_ops = &cvm_oct_npi_netdev_ops;
845 strcpy(dev->name, "npi%d");
846 break;
847
848 case CVMX_HELPER_INTERFACE_MODE_XAUI:
849 dev->netdev_ops = &cvm_oct_xaui_netdev_ops;
850 strcpy(dev->name, "xaui%d");
851 break;
852
853 case CVMX_HELPER_INTERFACE_MODE_LOOP:
854 dev->netdev_ops = &cvm_oct_npi_netdev_ops;
855 strcpy(dev->name, "loop%d");
856 break;
857
858 case CVMX_HELPER_INTERFACE_MODE_SGMII:
859 dev->netdev_ops = &cvm_oct_sgmii_netdev_ops;
860 strcpy(dev->name, "eth%d");
861 break;
862
863 case CVMX_HELPER_INTERFACE_MODE_SPI:
864 dev->netdev_ops = &cvm_oct_spi_netdev_ops;
865 strcpy(dev->name, "spi%d");
866 break;
867
868 case CVMX_HELPER_INTERFACE_MODE_RGMII:
869 case CVMX_HELPER_INTERFACE_MODE_GMII:
870 dev->netdev_ops = &cvm_oct_rgmii_netdev_ops;
871 strcpy(dev->name, "eth%d");
872 cvm_set_rgmii_delay(priv->of_node, interface,
873 port_index);
874 break;
875 }
876
877 if (!dev->netdev_ops) {
878 free_netdev(dev);
879 } else if (register_netdev(dev) < 0) {
880 pr_err("Failed to register ethernet device for interface %d, port %d\n",
881 interface, priv->port);
882 free_netdev(dev);
883 } else {
884 cvm_oct_device[priv->port] = dev;
885 fau -=
886 cvmx_pko_get_num_queues(priv->port) *
887 sizeof(u32);
888 schedule_delayed_work(&priv->port_periodic_work,
889 HZ);
890 }
891 }
892 }
893
894 cvm_oct_tx_initialize();
895 cvm_oct_rx_initialize();
896
897 /*
898 * 150 uS: about 10 1500-byte packets at 1GE.
899 */
900 cvm_oct_tx_poll_interval = 150 * (octeon_get_clock_rate() / 1000000);
901
902 schedule_delayed_work(&cvm_oct_rx_refill_work, HZ);
903
904 return 0;
905 }
906
907 static int cvm_oct_remove(struct platform_device *pdev)
908 {
909 int port;
910
911 cvmx_ipd_disable();
912
913 atomic_inc_return(&cvm_oct_poll_queue_stopping);
914 cancel_delayed_work_sync(&cvm_oct_rx_refill_work);
915
916 cvm_oct_rx_shutdown();
917 cvm_oct_tx_shutdown();
918
919 cvmx_pko_disable();
920
921 /* Free the ethernet devices */
922 for (port = 0; port < TOTAL_NUMBER_OF_PORTS; port++) {
923 if (cvm_oct_device[port]) {
924 struct net_device *dev = cvm_oct_device[port];
925 struct octeon_ethernet *priv = netdev_priv(dev);
926
927 cancel_delayed_work_sync(&priv->port_periodic_work);
928
929 cvm_oct_tx_shutdown_dev(dev);
930 unregister_netdev(dev);
931 free_netdev(dev);
932 cvm_oct_device[port] = NULL;
933 }
934 }
935
936 cvmx_pko_shutdown();
937
938 cvmx_ipd_free_ptr();
939
940 /* Free the HW pools */
941 cvm_oct_mem_empty_fpa(CVMX_FPA_PACKET_POOL, CVMX_FPA_PACKET_POOL_SIZE,
942 num_packet_buffers);
943 cvm_oct_mem_empty_fpa(CVMX_FPA_WQE_POOL, CVMX_FPA_WQE_POOL_SIZE,
944 num_packet_buffers);
945 if (CVMX_FPA_OUTPUT_BUFFER_POOL != CVMX_FPA_PACKET_POOL)
946 cvm_oct_mem_empty_fpa(CVMX_FPA_OUTPUT_BUFFER_POOL,
947 CVMX_FPA_OUTPUT_BUFFER_POOL_SIZE, 128);
948 return 0;
949 }
950
951 static const struct of_device_id cvm_oct_match[] = {
952 {
953 .compatible = "cavium,octeon-3860-pip",
954 },
955 {},
956 };
957 MODULE_DEVICE_TABLE(of, cvm_oct_match);
958
959 static struct platform_driver cvm_oct_driver = {
960 .probe = cvm_oct_probe,
961 .remove = cvm_oct_remove,
962 .driver = {
963 .name = KBUILD_MODNAME,
964 .of_match_table = cvm_oct_match,
965 },
966 };
967
968 module_platform_driver(cvm_oct_driver);
969
970 MODULE_LICENSE("GPL");
971 MODULE_AUTHOR("Cavium Networks <support@caviumnetworks.com>");
972 MODULE_DESCRIPTION("Cavium Networks Octeon ethernet driver.");
Linux with added FPC-III support