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fb: adv7393: off by one in probe function
[deliverable/linux.git] / 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
21 #include <net/dst.h>
22
23 #include <asm/octeon/octeon.h>
24
25 #include "ethernet-defines.h"
26 #include "octeon-ethernet.h"
27 #include "ethernet-mem.h"
28 #include "ethernet-rx.h"
29 #include "ethernet-tx.h"
30 #include "ethernet-mdio.h"
31 #include "ethernet-util.h"
32
33 #include <asm/octeon/cvmx-pip.h>
34 #include <asm/octeon/cvmx-pko.h>
35 #include <asm/octeon/cvmx-fau.h>
36 #include <asm/octeon/cvmx-ipd.h>
37 #include <asm/octeon/cvmx-helper.h>
38
39 #include <asm/octeon/cvmx-gmxx-defs.h>
40 #include <asm/octeon/cvmx-smix-defs.h>
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 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 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
90 /*
91 * cvm_oct_poll_queue_stopping - flag to indicate polling should stop.
92 *
93 * Set to one right before cvm_oct_poll_queue is destroyed.
94 */
95 atomic_t cvm_oct_poll_queue_stopping = ATOMIC_INIT(0);
96
97 /*
98 * Array of every ethernet device owned by this driver indexed by
99 * the ipd input port number.
100 */
101 struct net_device *cvm_oct_device[TOTAL_NUMBER_OF_PORTS];
102
103 u64 cvm_oct_tx_poll_interval;
104
105 static void cvm_oct_rx_refill_worker(struct work_struct *work);
106 static DECLARE_DELAYED_WORK(cvm_oct_rx_refill_work, cvm_oct_rx_refill_worker);
107
108 static void cvm_oct_rx_refill_worker(struct work_struct *work)
109 {
110 /*
111 * FPA 0 may have been drained, try to refill it if we need
112 * more than num_packet_buffers / 2, otherwise normal receive
113 * processing will refill it. If it were drained, no packets
114 * could be received so cvm_oct_napi_poll would never be
115 * invoked to do the refill.
116 */
117 cvm_oct_rx_refill_pool(num_packet_buffers / 2);
118
119 if (!atomic_read(&cvm_oct_poll_queue_stopping))
120 schedule_delayed_work(&cvm_oct_rx_refill_work, HZ);
121 }
122
123 static void cvm_oct_periodic_worker(struct work_struct *work)
124 {
125 struct octeon_ethernet *priv = container_of(work,
126 struct octeon_ethernet,
127 port_periodic_work.work);
128
129 if (priv->poll)
130 priv->poll(cvm_oct_device[priv->port]);
131
132 cvm_oct_device[priv->port]->netdev_ops->ndo_get_stats(
133 cvm_oct_device[priv->port]);
134
135 if (!atomic_read(&cvm_oct_poll_queue_stopping))
136 schedule_delayed_work(&priv->port_periodic_work, HZ);
137 }
138
139 static void cvm_oct_configure_common_hw(void)
140 {
141 /* Setup the FPA */
142 cvmx_fpa_enable();
143 cvm_oct_mem_fill_fpa(CVMX_FPA_PACKET_POOL, CVMX_FPA_PACKET_POOL_SIZE,
144 num_packet_buffers);
145 cvm_oct_mem_fill_fpa(CVMX_FPA_WQE_POOL, CVMX_FPA_WQE_POOL_SIZE,
146 num_packet_buffers);
147 if (CVMX_FPA_OUTPUT_BUFFER_POOL != CVMX_FPA_PACKET_POOL)
148 cvm_oct_mem_fill_fpa(CVMX_FPA_OUTPUT_BUFFER_POOL,
149 CVMX_FPA_OUTPUT_BUFFER_POOL_SIZE, 1024);
150
151 #ifdef __LITTLE_ENDIAN
152 {
153 union cvmx_ipd_ctl_status ipd_ctl_status;
154
155 ipd_ctl_status.u64 = cvmx_read_csr(CVMX_IPD_CTL_STATUS);
156 ipd_ctl_status.s.pkt_lend = 1;
157 ipd_ctl_status.s.wqe_lend = 1;
158 cvmx_write_csr(CVMX_IPD_CTL_STATUS, ipd_ctl_status.u64);
159 }
160 #endif
161
162 cvmx_helper_setup_red(num_packet_buffers / 4, num_packet_buffers / 8);
163 }
164
165 /**
166 * cvm_oct_free_work- Free a work queue entry
167 *
168 * @work_queue_entry: Work queue entry to free
169 *
170 * Returns Zero on success, Negative on failure.
171 */
172 int cvm_oct_free_work(void *work_queue_entry)
173 {
174 cvmx_wqe_t *work = work_queue_entry;
175
176 int segments = work->word2.s.bufs;
177 union cvmx_buf_ptr segment_ptr = work->packet_ptr;
178
179 while (segments--) {
180 union cvmx_buf_ptr next_ptr = *(union cvmx_buf_ptr *)
181 cvmx_phys_to_ptr(segment_ptr.s.addr - 8);
182 if (unlikely(!segment_ptr.s.i))
183 cvmx_fpa_free(cvm_oct_get_buffer_ptr(segment_ptr),
184 segment_ptr.s.pool,
185 CVMX_FPA_PACKET_POOL_SIZE / 128);
186 segment_ptr = next_ptr;
187 }
188 cvmx_fpa_free(work, CVMX_FPA_WQE_POOL, 1);
189
190 return 0;
191 }
192 EXPORT_SYMBOL(cvm_oct_free_work);
193
194 /**
195 * cvm_oct_common_get_stats - get the low level ethernet statistics
196 * @dev: Device to get the statistics from
197 *
198 * Returns Pointer to the statistics
199 */
200 static struct net_device_stats *cvm_oct_common_get_stats(struct net_device *dev)
201 {
202 cvmx_pip_port_status_t rx_status;
203 cvmx_pko_port_status_t tx_status;
204 struct octeon_ethernet *priv = netdev_priv(dev);
205
206 if (priv->port < CVMX_PIP_NUM_INPUT_PORTS) {
207 if (octeon_is_simulation()) {
208 /* The simulator doesn't support statistics */
209 memset(&rx_status, 0, sizeof(rx_status));
210 memset(&tx_status, 0, sizeof(tx_status));
211 } else {
212 cvmx_pip_get_port_status(priv->port, 1, &rx_status);
213 cvmx_pko_get_port_status(priv->port, 1, &tx_status);
214 }
215
216 priv->stats.rx_packets += rx_status.inb_packets;
217 priv->stats.tx_packets += tx_status.packets;
218 priv->stats.rx_bytes += rx_status.inb_octets;
219 priv->stats.tx_bytes += tx_status.octets;
220 priv->stats.multicast += rx_status.multicast_packets;
221 priv->stats.rx_crc_errors += rx_status.inb_errors;
222 priv->stats.rx_frame_errors += rx_status.fcs_align_err_packets;
223 priv->stats.rx_dropped += rx_status.dropped_packets;
224 }
225
226 return &priv->stats;
227 }
228
229 /**
230 * cvm_oct_common_change_mtu - change the link MTU
231 * @dev: Device to change
232 * @new_mtu: The new MTU
233 *
234 * Returns Zero on success
235 */
236 static int cvm_oct_common_change_mtu(struct net_device *dev, int new_mtu)
237 {
238 struct octeon_ethernet *priv = netdev_priv(dev);
239 int interface = INTERFACE(priv->port);
240 int index = INDEX(priv->port);
241 #if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE)
242 int vlan_bytes = 4;
243 #else
244 int vlan_bytes = 0;
245 #endif
246
247 /*
248 * Limit the MTU to make sure the ethernet packets are between
249 * 64 bytes and 65535 bytes.
250 */
251 if ((new_mtu + 14 + 4 + vlan_bytes < 64) ||
252 (new_mtu + 14 + 4 + vlan_bytes > 65392)) {
253 pr_err("MTU must be between %d and %d.\n",
254 64 - 14 - 4 - vlan_bytes, 65392 - 14 - 4 - vlan_bytes);
255 return -EINVAL;
256 }
257 dev->mtu = new_mtu;
258
259 if ((interface < 2) &&
260 (cvmx_helper_interface_get_mode(interface) !=
261 CVMX_HELPER_INTERFACE_MODE_SPI)) {
262 /* Add ethernet header and FCS, and VLAN if configured. */
263 int max_packet = new_mtu + 14 + 4 + vlan_bytes;
264
265 if (OCTEON_IS_MODEL(OCTEON_CN3XXX) ||
266 OCTEON_IS_MODEL(OCTEON_CN58XX)) {
267 /* Signal errors on packets larger than the MTU */
268 cvmx_write_csr(CVMX_GMXX_RXX_FRM_MAX(index, interface),
269 max_packet);
270 } else {
271 /*
272 * Set the hardware to truncate packets larger
273 * than the MTU and smaller the 64 bytes.
274 */
275 union cvmx_pip_frm_len_chkx frm_len_chk;
276
277 frm_len_chk.u64 = 0;
278 frm_len_chk.s.minlen = 64;
279 frm_len_chk.s.maxlen = max_packet;
280 cvmx_write_csr(CVMX_PIP_FRM_LEN_CHKX(interface),
281 frm_len_chk.u64);
282 }
283 /*
284 * Set the hardware to truncate packets larger than
285 * the MTU. The jabber register must be set to a
286 * multiple of 8 bytes, so round up.
287 */
288 cvmx_write_csr(CVMX_GMXX_RXX_JABBER(index, interface),
289 (max_packet + 7) & ~7u);
290 }
291 return 0;
292 }
293
294 /**
295 * cvm_oct_common_set_multicast_list - set the multicast list
296 * @dev: Device to work on
297 */
298 static void cvm_oct_common_set_multicast_list(struct net_device *dev)
299 {
300 union cvmx_gmxx_prtx_cfg gmx_cfg;
301 struct octeon_ethernet *priv = netdev_priv(dev);
302 int interface = INTERFACE(priv->port);
303 int index = INDEX(priv->port);
304
305 if ((interface < 2) &&
306 (cvmx_helper_interface_get_mode(interface) !=
307 CVMX_HELPER_INTERFACE_MODE_SPI)) {
308 union cvmx_gmxx_rxx_adr_ctl control;
309
310 control.u64 = 0;
311 control.s.bcst = 1; /* Allow broadcast MAC addresses */
312
313 if (!netdev_mc_empty(dev) || (dev->flags & IFF_ALLMULTI) ||
314 (dev->flags & IFF_PROMISC))
315 /* Force accept multicast packets */
316 control.s.mcst = 2;
317 else
318 /* Force reject multicast packets */
319 control.s.mcst = 1;
320
321 if (dev->flags & IFF_PROMISC)
322 /*
323 * Reject matches if promisc. Since CAM is
324 * shut off, should accept everything.
325 */
326 control.s.cam_mode = 0;
327 else
328 /* Filter packets based on the CAM */
329 control.s.cam_mode = 1;
330
331 gmx_cfg.u64 =
332 cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
333 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface),
334 gmx_cfg.u64 & ~1ull);
335
336 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CTL(index, interface),
337 control.u64);
338 if (dev->flags & IFF_PROMISC)
339 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM_EN
340 (index, interface), 0);
341 else
342 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM_EN
343 (index, interface), 1);
344
345 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface),
346 gmx_cfg.u64);
347 }
348 }
349
350 static int cvm_oct_set_mac_filter(struct net_device *dev)
351 {
352 struct octeon_ethernet *priv = netdev_priv(dev);
353 union cvmx_gmxx_prtx_cfg gmx_cfg;
354 int interface = INTERFACE(priv->port);
355 int index = INDEX(priv->port);
356
357 if ((interface < 2) &&
358 (cvmx_helper_interface_get_mode(interface) !=
359 CVMX_HELPER_INTERFACE_MODE_SPI)) {
360 int i;
361 u8 *ptr = dev->dev_addr;
362 u64 mac = 0;
363
364 for (i = 0; i < 6; i++)
365 mac = (mac << 8) | (u64)ptr[i];
366
367 gmx_cfg.u64 =
368 cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
369 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface),
370 gmx_cfg.u64 & ~1ull);
371
372 cvmx_write_csr(CVMX_GMXX_SMACX(index, interface), mac);
373 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM0(index, interface),
374 ptr[0]);
375 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM1(index, interface),
376 ptr[1]);
377 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM2(index, interface),
378 ptr[2]);
379 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM3(index, interface),
380 ptr[3]);
381 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM4(index, interface),
382 ptr[4]);
383 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM5(index, interface),
384 ptr[5]);
385 cvm_oct_common_set_multicast_list(dev);
386 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface),
387 gmx_cfg.u64);
388 }
389 return 0;
390 }
391
392 /**
393 * cvm_oct_common_set_mac_address - set the hardware MAC address for a device
394 * @dev: The device in question.
395 * @addr: Socket address.
396 *
397 * Returns Zero on success
398 */
399 static int cvm_oct_common_set_mac_address(struct net_device *dev, void *addr)
400 {
401 int r = eth_mac_addr(dev, addr);
402
403 if (r)
404 return r;
405 return cvm_oct_set_mac_filter(dev);
406 }
407
408 /**
409 * cvm_oct_common_init - per network device initialization
410 * @dev: Device to initialize
411 *
412 * Returns Zero on success
413 */
414 int cvm_oct_common_init(struct net_device *dev)
415 {
416 struct octeon_ethernet *priv = netdev_priv(dev);
417 const u8 *mac = NULL;
418
419 if (priv->of_node)
420 mac = of_get_mac_address(priv->of_node);
421
422 if (mac)
423 ether_addr_copy(dev->dev_addr, mac);
424 else
425 eth_hw_addr_random(dev);
426
427 /*
428 * Force the interface to use the POW send if always_use_pow
429 * was specified or it is in the pow send list.
430 */
431 if ((pow_send_group != -1) &&
432 (always_use_pow || strstr(pow_send_list, dev->name)))
433 priv->queue = -1;
434
435 if (priv->queue != -1)
436 dev->features |= NETIF_F_SG | NETIF_F_IP_CSUM;
437
438 /* We do our own locking, Linux doesn't need to */
439 dev->features |= NETIF_F_LLTX;
440 dev->ethtool_ops = &cvm_oct_ethtool_ops;
441
442 cvm_oct_set_mac_filter(dev);
443 dev->netdev_ops->ndo_change_mtu(dev, dev->mtu);
444
445 /*
446 * Zero out stats for port so we won't mistakenly show
447 * counters from the bootloader.
448 */
449 memset(dev->netdev_ops->ndo_get_stats(dev), 0,
450 sizeof(struct net_device_stats));
451
452 if (dev->netdev_ops->ndo_stop)
453 dev->netdev_ops->ndo_stop(dev);
454
455 return 0;
456 }
457
458 void cvm_oct_common_uninit(struct net_device *dev)
459 {
460 struct octeon_ethernet *priv = netdev_priv(dev);
461
462 if (priv->phydev)
463 phy_disconnect(priv->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 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), gmx_cfg.u64);
483
484 if (octeon_is_simulation())
485 return 0;
486
487 if (priv->phydev) {
488 int r = phy_read_status(priv->phydev);
489
490 if (r == 0 && priv->phydev->link == 0)
491 netif_carrier_off(dev);
492 cvm_oct_adjust_link(dev);
493 } else {
494 link_info = cvmx_helper_link_get(priv->port);
495 if (!link_info.s.link_up)
496 netif_carrier_off(dev);
497 priv->poll = link_poll;
498 link_poll(dev);
499 }
500
501 return 0;
502 }
503
504 void cvm_oct_link_poll(struct net_device *dev)
505 {
506 struct octeon_ethernet *priv = netdev_priv(dev);
507 cvmx_helper_link_info_t link_info;
508
509 link_info = cvmx_helper_link_get(priv->port);
510 if (link_info.u64 == priv->link_info)
511 return;
512
513 link_info = cvmx_helper_link_autoconf(priv->port);
514 priv->link_info = link_info.u64;
515
516 if (link_info.s.link_up) {
517 if (!netif_carrier_ok(dev))
518 netif_carrier_on(dev);
519 } else if (netif_carrier_ok(dev)) {
520 netif_carrier_off(dev);
521 }
522 cvm_oct_note_carrier(priv, link_info);
523 }
524
525 static int cvm_oct_xaui_open(struct net_device *dev)
526 {
527 return cvm_oct_common_open(dev, cvm_oct_link_poll);
528 }
529
530 static const struct net_device_ops cvm_oct_npi_netdev_ops = {
531 .ndo_init = cvm_oct_common_init,
532 .ndo_uninit = cvm_oct_common_uninit,
533 .ndo_start_xmit = cvm_oct_xmit,
534 .ndo_set_rx_mode = cvm_oct_common_set_multicast_list,
535 .ndo_set_mac_address = cvm_oct_common_set_mac_address,
536 .ndo_do_ioctl = cvm_oct_ioctl,
537 .ndo_change_mtu = cvm_oct_common_change_mtu,
538 .ndo_get_stats = cvm_oct_common_get_stats,
539 #ifdef CONFIG_NET_POLL_CONTROLLER
540 .ndo_poll_controller = cvm_oct_poll_controller,
541 #endif
542 };
543
544 static const struct net_device_ops cvm_oct_xaui_netdev_ops = {
545 .ndo_init = cvm_oct_common_init,
546 .ndo_uninit = cvm_oct_common_uninit,
547 .ndo_open = cvm_oct_xaui_open,
548 .ndo_stop = cvm_oct_common_stop,
549 .ndo_start_xmit = cvm_oct_xmit,
550 .ndo_set_rx_mode = cvm_oct_common_set_multicast_list,
551 .ndo_set_mac_address = cvm_oct_common_set_mac_address,
552 .ndo_do_ioctl = cvm_oct_ioctl,
553 .ndo_change_mtu = cvm_oct_common_change_mtu,
554 .ndo_get_stats = cvm_oct_common_get_stats,
555 #ifdef CONFIG_NET_POLL_CONTROLLER
556 .ndo_poll_controller = cvm_oct_poll_controller,
557 #endif
558 };
559
560 static const struct net_device_ops cvm_oct_sgmii_netdev_ops = {
561 .ndo_init = cvm_oct_sgmii_init,
562 .ndo_uninit = cvm_oct_common_uninit,
563 .ndo_open = cvm_oct_sgmii_open,
564 .ndo_stop = cvm_oct_common_stop,
565 .ndo_start_xmit = cvm_oct_xmit,
566 .ndo_set_rx_mode = cvm_oct_common_set_multicast_list,
567 .ndo_set_mac_address = cvm_oct_common_set_mac_address,
568 .ndo_do_ioctl = cvm_oct_ioctl,
569 .ndo_change_mtu = cvm_oct_common_change_mtu,
570 .ndo_get_stats = cvm_oct_common_get_stats,
571 #ifdef CONFIG_NET_POLL_CONTROLLER
572 .ndo_poll_controller = cvm_oct_poll_controller,
573 #endif
574 };
575
576 static const struct net_device_ops cvm_oct_spi_netdev_ops = {
577 .ndo_init = cvm_oct_spi_init,
578 .ndo_uninit = cvm_oct_spi_uninit,
579 .ndo_start_xmit = cvm_oct_xmit,
580 .ndo_set_rx_mode = cvm_oct_common_set_multicast_list,
581 .ndo_set_mac_address = cvm_oct_common_set_mac_address,
582 .ndo_do_ioctl = cvm_oct_ioctl,
583 .ndo_change_mtu = cvm_oct_common_change_mtu,
584 .ndo_get_stats = cvm_oct_common_get_stats,
585 #ifdef CONFIG_NET_POLL_CONTROLLER
586 .ndo_poll_controller = cvm_oct_poll_controller,
587 #endif
588 };
589
590 static const struct net_device_ops cvm_oct_rgmii_netdev_ops = {
591 .ndo_init = cvm_oct_common_init,
592 .ndo_uninit = cvm_oct_common_uninit,
593 .ndo_open = cvm_oct_rgmii_open,
594 .ndo_stop = cvm_oct_common_stop,
595 .ndo_start_xmit = cvm_oct_xmit,
596 .ndo_set_rx_mode = cvm_oct_common_set_multicast_list,
597 .ndo_set_mac_address = cvm_oct_common_set_mac_address,
598 .ndo_do_ioctl = cvm_oct_ioctl,
599 .ndo_change_mtu = cvm_oct_common_change_mtu,
600 .ndo_get_stats = cvm_oct_common_get_stats,
601 #ifdef CONFIG_NET_POLL_CONTROLLER
602 .ndo_poll_controller = cvm_oct_poll_controller,
603 #endif
604 };
605
606 static const struct net_device_ops cvm_oct_pow_netdev_ops = {
607 .ndo_init = cvm_oct_common_init,
608 .ndo_start_xmit = cvm_oct_xmit_pow,
609 .ndo_set_rx_mode = cvm_oct_common_set_multicast_list,
610 .ndo_set_mac_address = cvm_oct_common_set_mac_address,
611 .ndo_do_ioctl = cvm_oct_ioctl,
612 .ndo_change_mtu = cvm_oct_common_change_mtu,
613 .ndo_get_stats = cvm_oct_common_get_stats,
614 #ifdef CONFIG_NET_POLL_CONTROLLER
615 .ndo_poll_controller = cvm_oct_poll_controller,
616 #endif
617 };
618
619 static struct device_node *cvm_oct_of_get_child(
620 const struct device_node *parent, int reg_val)
621 {
622 struct device_node *node = NULL;
623 int size;
624 const __be32 *addr;
625
626 for (;;) {
627 node = of_get_next_child(parent, node);
628 if (!node)
629 break;
630 addr = of_get_property(node, "reg", &size);
631 if (addr && (be32_to_cpu(*addr) == reg_val))
632 break;
633 }
634 return node;
635 }
636
637 static struct device_node *cvm_oct_node_for_port(struct device_node *pip,
638 int interface, int port)
639 {
640 struct device_node *ni, *np;
641
642 ni = cvm_oct_of_get_child(pip, interface);
643 if (!ni)
644 return NULL;
645
646 np = cvm_oct_of_get_child(ni, port);
647 of_node_put(ni);
648
649 return np;
650 }
651
652 static int cvm_oct_probe(struct platform_device *pdev)
653 {
654 int num_interfaces;
655 int interface;
656 int fau = FAU_NUM_PACKET_BUFFERS_TO_FREE;
657 int qos;
658 struct device_node *pip;
659
660 octeon_mdiobus_force_mod_depencency();
661
662 pip = pdev->dev.of_node;
663 if (!pip) {
664 pr_err("Error: No 'pip' in /aliases\n");
665 return -EINVAL;
666 }
667
668
669 cvm_oct_configure_common_hw();
670
671 cvmx_helper_initialize_packet_io_global();
672
673 /* Change the input group for all ports before input is enabled */
674 num_interfaces = cvmx_helper_get_number_of_interfaces();
675 for (interface = 0; interface < num_interfaces; interface++) {
676 int num_ports = cvmx_helper_ports_on_interface(interface);
677 int port;
678
679 for (port = cvmx_helper_get_ipd_port(interface, 0);
680 port < cvmx_helper_get_ipd_port(interface, num_ports);
681 port++) {
682 union cvmx_pip_prt_tagx pip_prt_tagx;
683
684 pip_prt_tagx.u64 =
685 cvmx_read_csr(CVMX_PIP_PRT_TAGX(port));
686 pip_prt_tagx.s.grp = pow_receive_group;
687 cvmx_write_csr(CVMX_PIP_PRT_TAGX(port),
688 pip_prt_tagx.u64);
689 }
690 }
691
692 cvmx_helper_ipd_and_packet_input_enable();
693
694 memset(cvm_oct_device, 0, sizeof(cvm_oct_device));
695
696 /*
697 * Initialize the FAU used for counting packet buffers that
698 * need to be freed.
699 */
700 cvmx_fau_atomic_write32(FAU_NUM_PACKET_BUFFERS_TO_FREE, 0);
701
702 /* Initialize the FAU used for counting tx SKBs that need to be freed */
703 cvmx_fau_atomic_write32(FAU_TOTAL_TX_TO_CLEAN, 0);
704
705 if ((pow_send_group != -1)) {
706 struct net_device *dev;
707
708 pr_info("\tConfiguring device for POW only access\n");
709 dev = alloc_etherdev(sizeof(struct octeon_ethernet));
710 if (dev) {
711 /* Initialize the device private structure. */
712 struct octeon_ethernet *priv = netdev_priv(dev);
713
714 dev->netdev_ops = &cvm_oct_pow_netdev_ops;
715 priv->imode = CVMX_HELPER_INTERFACE_MODE_DISABLED;
716 priv->port = CVMX_PIP_NUM_INPUT_PORTS;
717 priv->queue = -1;
718 strcpy(dev->name, "pow%d");
719 for (qos = 0; qos < 16; qos++)
720 skb_queue_head_init(&priv->tx_free_list[qos]);
721
722 if (register_netdev(dev) < 0) {
723 pr_err("Failed to register ethernet device for POW\n");
724 free_netdev(dev);
725 } else {
726 cvm_oct_device[CVMX_PIP_NUM_INPUT_PORTS] = dev;
727 pr_info("%s: POW send group %d, receive group %d\n",
728 dev->name, pow_send_group,
729 pow_receive_group);
730 }
731 } else {
732 pr_err("Failed to allocate ethernet device for POW\n");
733 }
734 }
735
736 num_interfaces = cvmx_helper_get_number_of_interfaces();
737 for (interface = 0; interface < num_interfaces; interface++) {
738 cvmx_helper_interface_mode_t imode =
739 cvmx_helper_interface_get_mode(interface);
740 int num_ports = cvmx_helper_ports_on_interface(interface);
741 int port;
742 int port_index;
743
744 for (port_index = 0,
745 port = cvmx_helper_get_ipd_port(interface, 0);
746 port < cvmx_helper_get_ipd_port(interface, num_ports);
747 port_index++, port++) {
748 struct octeon_ethernet *priv;
749 struct net_device *dev =
750 alloc_etherdev(sizeof(struct octeon_ethernet));
751 if (!dev) {
752 pr_err("Failed to allocate ethernet device for port %d\n",
753 port);
754 continue;
755 }
756
757 /* Initialize the device private structure. */
758 priv = netdev_priv(dev);
759 priv->netdev = dev;
760 priv->of_node = cvm_oct_node_for_port(pip, interface,
761 port_index);
762
763 INIT_DELAYED_WORK(&priv->port_periodic_work,
764 cvm_oct_periodic_worker);
765 priv->imode = imode;
766 priv->port = port;
767 priv->queue = cvmx_pko_get_base_queue(priv->port);
768 priv->fau = fau - cvmx_pko_get_num_queues(port) * 4;
769 for (qos = 0; qos < 16; qos++)
770 skb_queue_head_init(&priv->tx_free_list[qos]);
771 for (qos = 0; qos < cvmx_pko_get_num_queues(port);
772 qos++)
773 cvmx_fau_atomic_write32(priv->fau + qos * 4, 0);
774
775 switch (priv->imode) {
776 /* These types don't support ports to IPD/PKO */
777 case CVMX_HELPER_INTERFACE_MODE_DISABLED:
778 case CVMX_HELPER_INTERFACE_MODE_PCIE:
779 case CVMX_HELPER_INTERFACE_MODE_PICMG:
780 break;
781
782 case CVMX_HELPER_INTERFACE_MODE_NPI:
783 dev->netdev_ops = &cvm_oct_npi_netdev_ops;
784 strcpy(dev->name, "npi%d");
785 break;
786
787 case CVMX_HELPER_INTERFACE_MODE_XAUI:
788 dev->netdev_ops = &cvm_oct_xaui_netdev_ops;
789 strcpy(dev->name, "xaui%d");
790 break;
791
792 case CVMX_HELPER_INTERFACE_MODE_LOOP:
793 dev->netdev_ops = &cvm_oct_npi_netdev_ops;
794 strcpy(dev->name, "loop%d");
795 break;
796
797 case CVMX_HELPER_INTERFACE_MODE_SGMII:
798 dev->netdev_ops = &cvm_oct_sgmii_netdev_ops;
799 strcpy(dev->name, "eth%d");
800 break;
801
802 case CVMX_HELPER_INTERFACE_MODE_SPI:
803 dev->netdev_ops = &cvm_oct_spi_netdev_ops;
804 strcpy(dev->name, "spi%d");
805 break;
806
807 case CVMX_HELPER_INTERFACE_MODE_RGMII:
808 case CVMX_HELPER_INTERFACE_MODE_GMII:
809 dev->netdev_ops = &cvm_oct_rgmii_netdev_ops;
810 strcpy(dev->name, "eth%d");
811 break;
812 }
813
814 if (!dev->netdev_ops) {
815 free_netdev(dev);
816 } else if (register_netdev(dev) < 0) {
817 pr_err("Failed to register ethernet device for interface %d, port %d\n",
818 interface, priv->port);
819 free_netdev(dev);
820 } else {
821 cvm_oct_device[priv->port] = dev;
822 fau -=
823 cvmx_pko_get_num_queues(priv->port) *
824 sizeof(u32);
825 schedule_delayed_work(&priv->port_periodic_work, HZ);
826 }
827 }
828 }
829
830 cvm_oct_tx_initialize();
831 cvm_oct_rx_initialize();
832
833 /*
834 * 150 uS: about 10 1500-byte packets at 1GE.
835 */
836 cvm_oct_tx_poll_interval = 150 * (octeon_get_clock_rate() / 1000000);
837
838 schedule_delayed_work(&cvm_oct_rx_refill_work, HZ);
839
840 return 0;
841 }
842
843 static int cvm_oct_remove(struct platform_device *pdev)
844 {
845 int port;
846
847 /* Disable POW interrupt */
848 if (OCTEON_IS_MODEL(OCTEON_CN68XX))
849 cvmx_write_csr(CVMX_SSO_WQ_INT_THRX(pow_receive_group), 0);
850 else
851 cvmx_write_csr(CVMX_POW_WQ_INT_THRX(pow_receive_group), 0);
852
853 cvmx_ipd_disable();
854
855 /* Free the interrupt handler */
856 free_irq(OCTEON_IRQ_WORKQ0 + pow_receive_group, cvm_oct_device);
857
858 atomic_inc_return(&cvm_oct_poll_queue_stopping);
859 cancel_delayed_work_sync(&cvm_oct_rx_refill_work);
860
861 cvm_oct_rx_shutdown();
862 cvm_oct_tx_shutdown();
863
864 cvmx_pko_disable();
865
866 /* Free the ethernet devices */
867 for (port = 0; port < TOTAL_NUMBER_OF_PORTS; port++) {
868 if (cvm_oct_device[port]) {
869 struct net_device *dev = cvm_oct_device[port];
870 struct octeon_ethernet *priv = netdev_priv(dev);
871
872 cancel_delayed_work_sync(&priv->port_periodic_work);
873
874 cvm_oct_tx_shutdown_dev(dev);
875 unregister_netdev(dev);
876 free_netdev(dev);
877 cvm_oct_device[port] = NULL;
878 }
879 }
880
881
882 cvmx_pko_shutdown();
883
884 cvmx_ipd_free_ptr();
885
886 /* Free the HW pools */
887 cvm_oct_mem_empty_fpa(CVMX_FPA_PACKET_POOL, CVMX_FPA_PACKET_POOL_SIZE,
888 num_packet_buffers);
889 cvm_oct_mem_empty_fpa(CVMX_FPA_WQE_POOL, CVMX_FPA_WQE_POOL_SIZE,
890 num_packet_buffers);
891 if (CVMX_FPA_OUTPUT_BUFFER_POOL != CVMX_FPA_PACKET_POOL)
892 cvm_oct_mem_empty_fpa(CVMX_FPA_OUTPUT_BUFFER_POOL,
893 CVMX_FPA_OUTPUT_BUFFER_POOL_SIZE, 128);
894 return 0;
895 }
896
897 static const struct of_device_id cvm_oct_match[] = {
898 {
899 .compatible = "cavium,octeon-3860-pip",
900 },
901 {},
902 };
903 MODULE_DEVICE_TABLE(of, cvm_oct_match);
904
905 static struct platform_driver cvm_oct_driver = {
906 .probe = cvm_oct_probe,
907 .remove = cvm_oct_remove,
908 .driver = {
909 .name = KBUILD_MODNAME,
910 .of_match_table = cvm_oct_match,
911 },
912 };
913
914 module_platform_driver(cvm_oct_driver);
915
916 MODULE_LICENSE("GPL");
917 MODULE_AUTHOR("Cavium Networks <support@caviumnetworks.com>");
918 MODULE_DESCRIPTION("Cavium Networks Octeon ethernet driver.");
Linux kernel - Deliverables
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