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staging: octeon-ethernet: eliminate DONT_WRITEBACK
[deliverable/linux.git] / drivers / staging / octeon / ethernet.c
1 /**********************************************************************
2 * Author: Cavium Networks
3 *
4 * Contact: support@caviumnetworks.com
5 * This file is part of the OCTEON SDK
6 *
7 * Copyright (c) 2003-2007 Cavium Networks
8 *
9 * This file is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License, Version 2, as
11 * published by the Free Software Foundation.
12 *
13 * This file is distributed in the hope that it will be useful, but
14 * AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty
15 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or
16 * NONINFRINGEMENT. See the GNU General Public License for more
17 * details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this file; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
22 * or visit http://www.gnu.org/licenses/.
23 *
24 * This file may also be available under a different license from Cavium.
25 * Contact Cavium Networks for more information
26 **********************************************************************/
27 #include <linux/platform_device.h>
28 #include <linux/kernel.h>
29 #include <linux/module.h>
30 #include <linux/netdevice.h>
31 #include <linux/etherdevice.h>
32 #include <linux/phy.h>
33 #include <linux/slab.h>
34 #include <linux/interrupt.h>
35 #include <linux/of_net.h>
36
37 #include <net/dst.h>
38
39 #include <asm/octeon/octeon.h>
40
41 #include "ethernet-defines.h"
42 #include "octeon-ethernet.h"
43 #include "ethernet-mem.h"
44 #include "ethernet-rx.h"
45 #include "ethernet-tx.h"
46 #include "ethernet-mdio.h"
47 #include "ethernet-util.h"
48
49 #include <asm/octeon/cvmx-pip.h>
50 #include <asm/octeon/cvmx-pko.h>
51 #include <asm/octeon/cvmx-fau.h>
52 #include <asm/octeon/cvmx-ipd.h>
53 #include <asm/octeon/cvmx-helper.h>
54
55 #include <asm/octeon/cvmx-gmxx-defs.h>
56 #include <asm/octeon/cvmx-smix-defs.h>
57
58 static int num_packet_buffers = 1024;
59 module_param(num_packet_buffers, int, 0444);
60 MODULE_PARM_DESC(num_packet_buffers, "\n"
61 "\tNumber of packet buffers to allocate and store in the\n"
62 "\tFPA. By default, 1024 packet buffers are used.\n");
63
64 int pow_receive_group = 15;
65 module_param(pow_receive_group, int, 0444);
66 MODULE_PARM_DESC(pow_receive_group, "\n"
67 "\tPOW group to receive packets from. All ethernet hardware\n"
68 "\twill be configured to send incoming packets to this POW\n"
69 "\tgroup. Also any other software can submit packets to this\n"
70 "\tgroup for the kernel to process.");
71
72 int pow_send_group = -1;
73 module_param(pow_send_group, int, 0644);
74 MODULE_PARM_DESC(pow_send_group, "\n"
75 "\tPOW group to send packets to other software on. This\n"
76 "\tcontrols the creation of the virtual device pow0.\n"
77 "\talways_use_pow also depends on this value.");
78
79 int always_use_pow;
80 module_param(always_use_pow, int, 0444);
81 MODULE_PARM_DESC(always_use_pow, "\n"
82 "\tWhen set, always send to the pow group. This will cause\n"
83 "\tpackets sent to real ethernet devices to be sent to the\n"
84 "\tPOW group instead of the hardware. Unless some other\n"
85 "\tapplication changes the config, packets will still be\n"
86 "\treceived from the low level hardware. Use this option\n"
87 "\tto allow a CVMX app to intercept all packets from the\n"
88 "\tlinux kernel. You must specify pow_send_group along with\n"
89 "\tthis option.");
90
91 char pow_send_list[128] = "";
92 module_param_string(pow_send_list, pow_send_list, sizeof(pow_send_list), 0444);
93 MODULE_PARM_DESC(pow_send_list, "\n"
94 "\tComma separated list of ethernet devices that should use the\n"
95 "\tPOW for transmit instead of the actual ethernet hardware. This\n"
96 "\tis a per port version of always_use_pow. always_use_pow takes\n"
97 "\tprecedence over this list. For example, setting this to\n"
98 "\t\"eth2,spi3,spi7\" would cause these three devices to transmit\n"
99 "\tusing the pow_send_group.");
100
101 int rx_napi_weight = 32;
102 module_param(rx_napi_weight, int, 0444);
103 MODULE_PARM_DESC(rx_napi_weight, "The NAPI WEIGHT parameter.");
104
105 /**
106 * cvm_oct_poll_queue - Workqueue for polling operations.
107 */
108 struct workqueue_struct *cvm_oct_poll_queue;
109
110 /**
111 * cvm_oct_poll_queue_stopping - flag to indicate polling should stop.
112 *
113 * Set to one right before cvm_oct_poll_queue is destroyed.
114 */
115 atomic_t cvm_oct_poll_queue_stopping = ATOMIC_INIT(0);
116
117 /**
118 * Array of every ethernet device owned by this driver indexed by
119 * the ipd input port number.
120 */
121 struct net_device *cvm_oct_device[TOTAL_NUMBER_OF_PORTS];
122
123 u64 cvm_oct_tx_poll_interval;
124
125 static void cvm_oct_rx_refill_worker(struct work_struct *work);
126 static DECLARE_DELAYED_WORK(cvm_oct_rx_refill_work, cvm_oct_rx_refill_worker);
127
128 static void cvm_oct_rx_refill_worker(struct work_struct *work)
129 {
130 /*
131 * FPA 0 may have been drained, try to refill it if we need
132 * more than num_packet_buffers / 2, otherwise normal receive
133 * processing will refill it. If it were drained, no packets
134 * could be received so cvm_oct_napi_poll would never be
135 * invoked to do the refill.
136 */
137 cvm_oct_rx_refill_pool(num_packet_buffers / 2);
138
139 if (!atomic_read(&cvm_oct_poll_queue_stopping))
140 queue_delayed_work(cvm_oct_poll_queue,
141 &cvm_oct_rx_refill_work, HZ);
142 }
143
144 static void cvm_oct_periodic_worker(struct work_struct *work)
145 {
146 struct octeon_ethernet *priv = container_of(work,
147 struct octeon_ethernet,
148 port_periodic_work.work);
149
150 if (priv->poll)
151 priv->poll(cvm_oct_device[priv->port]);
152
153 cvm_oct_device[priv->port]->netdev_ops->ndo_get_stats(
154 cvm_oct_device[priv->port]);
155
156 if (!atomic_read(&cvm_oct_poll_queue_stopping))
157 queue_delayed_work(cvm_oct_poll_queue,
158 &priv->port_periodic_work, HZ);
159 }
160
161 static void cvm_oct_configure_common_hw(void)
162 {
163 /* Setup the FPA */
164 cvmx_fpa_enable();
165 cvm_oct_mem_fill_fpa(CVMX_FPA_PACKET_POOL, CVMX_FPA_PACKET_POOL_SIZE,
166 num_packet_buffers);
167 cvm_oct_mem_fill_fpa(CVMX_FPA_WQE_POOL, CVMX_FPA_WQE_POOL_SIZE,
168 num_packet_buffers);
169 if (CVMX_FPA_OUTPUT_BUFFER_POOL != CVMX_FPA_PACKET_POOL)
170 cvm_oct_mem_fill_fpa(CVMX_FPA_OUTPUT_BUFFER_POOL,
171 CVMX_FPA_OUTPUT_BUFFER_POOL_SIZE, 128);
172
173 #ifdef __LITTLE_ENDIAN
174 {
175 union cvmx_ipd_ctl_status ipd_ctl_status;
176 ipd_ctl_status.u64 = cvmx_read_csr(CVMX_IPD_CTL_STATUS);
177 ipd_ctl_status.s.pkt_lend = 1;
178 ipd_ctl_status.s.wqe_lend = 1;
179 cvmx_write_csr(CVMX_IPD_CTL_STATUS, ipd_ctl_status.u64);
180 }
181 #endif
182
183 cvmx_helper_setup_red(num_packet_buffers / 4, num_packet_buffers / 8);
184 }
185
186 /**
187 * cvm_oct_free_work- Free a work queue entry
188 *
189 * @work_queue_entry: Work queue entry to free
190 *
191 * Returns Zero on success, Negative on failure.
192 */
193 int cvm_oct_free_work(void *work_queue_entry)
194 {
195 cvmx_wqe_t *work = work_queue_entry;
196
197 int segments = work->word2.s.bufs;
198 union cvmx_buf_ptr segment_ptr = work->packet_ptr;
199
200 while (segments--) {
201 union cvmx_buf_ptr next_ptr = *(union cvmx_buf_ptr *)
202 cvmx_phys_to_ptr(segment_ptr.s.addr - 8);
203 if (unlikely(!segment_ptr.s.i))
204 cvmx_fpa_free(cvm_oct_get_buffer_ptr(segment_ptr),
205 segment_ptr.s.pool,
206 CVMX_FPA_PACKET_POOL_SIZE / 128);
207 segment_ptr = next_ptr;
208 }
209 cvmx_fpa_free(work, CVMX_FPA_WQE_POOL, 1);
210
211 return 0;
212 }
213 EXPORT_SYMBOL(cvm_oct_free_work);
214
215 /**
216 * cvm_oct_common_get_stats - get the low level ethernet statistics
217 * @dev: Device to get the statistics from
218 *
219 * Returns Pointer to the statistics
220 */
221 static struct net_device_stats *cvm_oct_common_get_stats(struct net_device *dev)
222 {
223 cvmx_pip_port_status_t rx_status;
224 cvmx_pko_port_status_t tx_status;
225 struct octeon_ethernet *priv = netdev_priv(dev);
226
227 if (priv->port < CVMX_PIP_NUM_INPUT_PORTS) {
228 if (octeon_is_simulation()) {
229 /* The simulator doesn't support statistics */
230 memset(&rx_status, 0, sizeof(rx_status));
231 memset(&tx_status, 0, sizeof(tx_status));
232 } else {
233 cvmx_pip_get_port_status(priv->port, 1, &rx_status);
234 cvmx_pko_get_port_status(priv->port, 1, &tx_status);
235 }
236
237 priv->stats.rx_packets += rx_status.inb_packets;
238 priv->stats.tx_packets += tx_status.packets;
239 priv->stats.rx_bytes += rx_status.inb_octets;
240 priv->stats.tx_bytes += tx_status.octets;
241 priv->stats.multicast += rx_status.multicast_packets;
242 priv->stats.rx_crc_errors += rx_status.inb_errors;
243 priv->stats.rx_frame_errors += rx_status.fcs_align_err_packets;
244
245 /*
246 * The drop counter must be incremented atomically
247 * since the RX tasklet also increments it.
248 */
249 #ifdef CONFIG_64BIT
250 atomic64_add(rx_status.dropped_packets,
251 (atomic64_t *)&priv->stats.rx_dropped);
252 #else
253 atomic_add(rx_status.dropped_packets,
254 (atomic_t *)&priv->stats.rx_dropped);
255 #endif
256 }
257
258 return &priv->stats;
259 }
260
261 /**
262 * cvm_oct_common_change_mtu - change the link MTU
263 * @dev: Device to change
264 * @new_mtu: The new MTU
265 *
266 * Returns Zero on success
267 */
268 static int cvm_oct_common_change_mtu(struct net_device *dev, int new_mtu)
269 {
270 struct octeon_ethernet *priv = netdev_priv(dev);
271 int interface = INTERFACE(priv->port);
272 int index = INDEX(priv->port);
273 #if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE)
274 int vlan_bytes = 4;
275 #else
276 int vlan_bytes = 0;
277 #endif
278
279 /*
280 * Limit the MTU to make sure the ethernet packets are between
281 * 64 bytes and 65535 bytes.
282 */
283 if ((new_mtu + 14 + 4 + vlan_bytes < 64)
284 || (new_mtu + 14 + 4 + vlan_bytes > 65392)) {
285 pr_err("MTU must be between %d and %d.\n",
286 64 - 14 - 4 - vlan_bytes, 65392 - 14 - 4 - vlan_bytes);
287 return -EINVAL;
288 }
289 dev->mtu = new_mtu;
290
291 if ((interface < 2)
292 && (cvmx_helper_interface_get_mode(interface) !=
293 CVMX_HELPER_INTERFACE_MODE_SPI)) {
294 /* Add ethernet header and FCS, and VLAN if configured. */
295 int max_packet = new_mtu + 14 + 4 + vlan_bytes;
296
297 if (OCTEON_IS_MODEL(OCTEON_CN3XXX)
298 || OCTEON_IS_MODEL(OCTEON_CN58XX)) {
299 /* Signal errors on packets larger than the MTU */
300 cvmx_write_csr(CVMX_GMXX_RXX_FRM_MAX(index, interface),
301 max_packet);
302 } else {
303 /*
304 * Set the hardware to truncate packets larger
305 * than the MTU and smaller the 64 bytes.
306 */
307 union cvmx_pip_frm_len_chkx frm_len_chk;
308
309 frm_len_chk.u64 = 0;
310 frm_len_chk.s.minlen = 64;
311 frm_len_chk.s.maxlen = max_packet;
312 cvmx_write_csr(CVMX_PIP_FRM_LEN_CHKX(interface),
313 frm_len_chk.u64);
314 }
315 /*
316 * Set the hardware to truncate packets larger than
317 * the MTU. The jabber register must be set to a
318 * multiple of 8 bytes, so round up.
319 */
320 cvmx_write_csr(CVMX_GMXX_RXX_JABBER(index, interface),
321 (max_packet + 7) & ~7u);
322 }
323 return 0;
324 }
325
326 /**
327 * cvm_oct_common_set_multicast_list - set the multicast list
328 * @dev: Device to work on
329 */
330 static void cvm_oct_common_set_multicast_list(struct net_device *dev)
331 {
332 union cvmx_gmxx_prtx_cfg gmx_cfg;
333 struct octeon_ethernet *priv = netdev_priv(dev);
334 int interface = INTERFACE(priv->port);
335 int index = INDEX(priv->port);
336
337 if ((interface < 2)
338 && (cvmx_helper_interface_get_mode(interface) !=
339 CVMX_HELPER_INTERFACE_MODE_SPI)) {
340 union cvmx_gmxx_rxx_adr_ctl control;
341
342 control.u64 = 0;
343 control.s.bcst = 1; /* Allow broadcast MAC addresses */
344
345 if (!netdev_mc_empty(dev) || (dev->flags & IFF_ALLMULTI) ||
346 (dev->flags & IFF_PROMISC))
347 /* Force accept multicast packets */
348 control.s.mcst = 2;
349 else
350 /* Force reject multicast packets */
351 control.s.mcst = 1;
352
353 if (dev->flags & IFF_PROMISC)
354 /*
355 * Reject matches if promisc. Since CAM is
356 * shut off, should accept everything.
357 */
358 control.s.cam_mode = 0;
359 else
360 /* Filter packets based on the CAM */
361 control.s.cam_mode = 1;
362
363 gmx_cfg.u64 =
364 cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
365 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface),
366 gmx_cfg.u64 & ~1ull);
367
368 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CTL(index, interface),
369 control.u64);
370 if (dev->flags & IFF_PROMISC)
371 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM_EN
372 (index, interface), 0);
373 else
374 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM_EN
375 (index, interface), 1);
376
377 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface),
378 gmx_cfg.u64);
379 }
380 }
381
382 /**
383 * cvm_oct_common_set_mac_address - set the hardware MAC address for a device
384 * @dev: The device in question.
385 * @addr: Address structure to change it too.
386
387 * Returns Zero on success
388 */
389 static int cvm_oct_set_mac_filter(struct net_device *dev)
390 {
391 struct octeon_ethernet *priv = netdev_priv(dev);
392 union cvmx_gmxx_prtx_cfg gmx_cfg;
393 int interface = INTERFACE(priv->port);
394 int index = INDEX(priv->port);
395
396 if ((interface < 2)
397 && (cvmx_helper_interface_get_mode(interface) !=
398 CVMX_HELPER_INTERFACE_MODE_SPI)) {
399 int i;
400 uint8_t *ptr = dev->dev_addr;
401 uint64_t mac = 0;
402
403 for (i = 0; i < 6; i++)
404 mac = (mac << 8) | (uint64_t)ptr[i];
405
406 gmx_cfg.u64 =
407 cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
408 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface),
409 gmx_cfg.u64 & ~1ull);
410
411 cvmx_write_csr(CVMX_GMXX_SMACX(index, interface), mac);
412 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM0(index, interface),
413 ptr[0]);
414 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM1(index, interface),
415 ptr[1]);
416 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM2(index, interface),
417 ptr[2]);
418 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM3(index, interface),
419 ptr[3]);
420 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM4(index, interface),
421 ptr[4]);
422 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM5(index, interface),
423 ptr[5]);
424 cvm_oct_common_set_multicast_list(dev);
425 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface),
426 gmx_cfg.u64);
427 }
428 return 0;
429 }
430
431 static int cvm_oct_common_set_mac_address(struct net_device *dev, void *addr)
432 {
433 int r = eth_mac_addr(dev, addr);
434
435 if (r)
436 return r;
437 return cvm_oct_set_mac_filter(dev);
438 }
439
440 /**
441 * cvm_oct_common_init - per network device initialization
442 * @dev: Device to initialize
443 *
444 * Returns Zero on success
445 */
446 int cvm_oct_common_init(struct net_device *dev)
447 {
448 struct octeon_ethernet *priv = netdev_priv(dev);
449 const u8 *mac = NULL;
450
451 if (priv->of_node)
452 mac = of_get_mac_address(priv->of_node);
453
454 if (mac)
455 ether_addr_copy(dev->dev_addr, mac);
456 else
457 eth_hw_addr_random(dev);
458
459 /*
460 * Force the interface to use the POW send if always_use_pow
461 * was specified or it is in the pow send list.
462 */
463 if ((pow_send_group != -1)
464 && (always_use_pow || strstr(pow_send_list, dev->name)))
465 priv->queue = -1;
466
467 if (priv->queue != -1)
468 dev->features |= NETIF_F_SG | NETIF_F_IP_CSUM;
469
470 /* We do our own locking, Linux doesn't need to */
471 dev->features |= NETIF_F_LLTX;
472 dev->ethtool_ops = &cvm_oct_ethtool_ops;
473
474 cvm_oct_set_mac_filter(dev);
475 dev->netdev_ops->ndo_change_mtu(dev, dev->mtu);
476
477 /*
478 * Zero out stats for port so we won't mistakenly show
479 * counters from the bootloader.
480 */
481 memset(dev->netdev_ops->ndo_get_stats(dev), 0,
482 sizeof(struct net_device_stats));
483
484 if (dev->netdev_ops->ndo_stop)
485 dev->netdev_ops->ndo_stop(dev);
486
487 return 0;
488 }
489
490 void cvm_oct_common_uninit(struct net_device *dev)
491 {
492 struct octeon_ethernet *priv = netdev_priv(dev);
493
494 if (priv->phydev)
495 phy_disconnect(priv->phydev);
496 }
497
498 int cvm_oct_common_open(struct net_device *dev,
499 void (*link_poll)(struct net_device *), bool poll_now)
500 {
501 union cvmx_gmxx_prtx_cfg gmx_cfg;
502 struct octeon_ethernet *priv = netdev_priv(dev);
503 int interface = INTERFACE(priv->port);
504 int index = INDEX(priv->port);
505 cvmx_helper_link_info_t link_info;
506 int rv;
507
508 rv = cvm_oct_phy_setup_device(dev);
509 if (rv)
510 return rv;
511
512 gmx_cfg.u64 = cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
513 gmx_cfg.s.en = 1;
514 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), gmx_cfg.u64);
515
516 if (octeon_is_simulation())
517 return 0;
518
519 if (priv->phydev) {
520 int r = phy_read_status(priv->phydev);
521
522 if (r == 0 && priv->phydev->link == 0)
523 netif_carrier_off(dev);
524 cvm_oct_adjust_link(dev);
525 } else {
526 link_info = cvmx_helper_link_get(priv->port);
527 if (!link_info.s.link_up)
528 netif_carrier_off(dev);
529 priv->poll = link_poll;
530 if (poll_now)
531 link_poll(dev);
532 }
533
534 return 0;
535 }
536
537 void cvm_oct_link_poll(struct net_device *dev)
538 {
539 struct octeon_ethernet *priv = netdev_priv(dev);
540 cvmx_helper_link_info_t link_info;
541
542 link_info = cvmx_helper_link_get(priv->port);
543 if (link_info.u64 == priv->link_info)
544 return;
545
546 link_info = cvmx_helper_link_autoconf(priv->port);
547 priv->link_info = link_info.u64;
548
549 if (link_info.s.link_up) {
550 if (!netif_carrier_ok(dev))
551 netif_carrier_on(dev);
552 } else if (netif_carrier_ok(dev)) {
553 netif_carrier_off(dev);
554 }
555 cvm_oct_note_carrier(priv, link_info);
556 }
557
558 static const struct net_device_ops cvm_oct_npi_netdev_ops = {
559 .ndo_init = cvm_oct_common_init,
560 .ndo_uninit = cvm_oct_common_uninit,
561 .ndo_start_xmit = cvm_oct_xmit,
562 .ndo_set_rx_mode = cvm_oct_common_set_multicast_list,
563 .ndo_set_mac_address = cvm_oct_common_set_mac_address,
564 .ndo_do_ioctl = cvm_oct_ioctl,
565 .ndo_change_mtu = cvm_oct_common_change_mtu,
566 .ndo_get_stats = cvm_oct_common_get_stats,
567 #ifdef CONFIG_NET_POLL_CONTROLLER
568 .ndo_poll_controller = cvm_oct_poll_controller,
569 #endif
570 };
571 static const struct net_device_ops cvm_oct_xaui_netdev_ops = {
572 .ndo_init = cvm_oct_xaui_init,
573 .ndo_uninit = cvm_oct_common_uninit,
574 .ndo_open = cvm_oct_xaui_open,
575 .ndo_stop = cvm_oct_common_stop,
576 .ndo_start_xmit = cvm_oct_xmit,
577 .ndo_set_rx_mode = cvm_oct_common_set_multicast_list,
578 .ndo_set_mac_address = cvm_oct_common_set_mac_address,
579 .ndo_do_ioctl = cvm_oct_ioctl,
580 .ndo_change_mtu = cvm_oct_common_change_mtu,
581 .ndo_get_stats = cvm_oct_common_get_stats,
582 #ifdef CONFIG_NET_POLL_CONTROLLER
583 .ndo_poll_controller = cvm_oct_poll_controller,
584 #endif
585 };
586 static const struct net_device_ops cvm_oct_sgmii_netdev_ops = {
587 .ndo_init = cvm_oct_sgmii_init,
588 .ndo_uninit = cvm_oct_common_uninit,
589 .ndo_open = cvm_oct_sgmii_open,
590 .ndo_stop = cvm_oct_common_stop,
591 .ndo_start_xmit = cvm_oct_xmit,
592 .ndo_set_rx_mode = cvm_oct_common_set_multicast_list,
593 .ndo_set_mac_address = cvm_oct_common_set_mac_address,
594 .ndo_do_ioctl = cvm_oct_ioctl,
595 .ndo_change_mtu = cvm_oct_common_change_mtu,
596 .ndo_get_stats = cvm_oct_common_get_stats,
597 #ifdef CONFIG_NET_POLL_CONTROLLER
598 .ndo_poll_controller = cvm_oct_poll_controller,
599 #endif
600 };
601 static const struct net_device_ops cvm_oct_spi_netdev_ops = {
602 .ndo_init = cvm_oct_spi_init,
603 .ndo_uninit = cvm_oct_spi_uninit,
604 .ndo_start_xmit = cvm_oct_xmit,
605 .ndo_set_rx_mode = cvm_oct_common_set_multicast_list,
606 .ndo_set_mac_address = cvm_oct_common_set_mac_address,
607 .ndo_do_ioctl = cvm_oct_ioctl,
608 .ndo_change_mtu = cvm_oct_common_change_mtu,
609 .ndo_get_stats = cvm_oct_common_get_stats,
610 #ifdef CONFIG_NET_POLL_CONTROLLER
611 .ndo_poll_controller = cvm_oct_poll_controller,
612 #endif
613 };
614 static const struct net_device_ops cvm_oct_rgmii_netdev_ops = {
615 .ndo_init = cvm_oct_rgmii_init,
616 .ndo_uninit = cvm_oct_rgmii_uninit,
617 .ndo_open = cvm_oct_rgmii_open,
618 .ndo_stop = cvm_oct_common_stop,
619 .ndo_start_xmit = cvm_oct_xmit,
620 .ndo_set_rx_mode = cvm_oct_common_set_multicast_list,
621 .ndo_set_mac_address = cvm_oct_common_set_mac_address,
622 .ndo_do_ioctl = cvm_oct_ioctl,
623 .ndo_change_mtu = cvm_oct_common_change_mtu,
624 .ndo_get_stats = cvm_oct_common_get_stats,
625 #ifdef CONFIG_NET_POLL_CONTROLLER
626 .ndo_poll_controller = cvm_oct_poll_controller,
627 #endif
628 };
629 static const struct net_device_ops cvm_oct_pow_netdev_ops = {
630 .ndo_init = cvm_oct_common_init,
631 .ndo_start_xmit = cvm_oct_xmit_pow,
632 .ndo_set_rx_mode = cvm_oct_common_set_multicast_list,
633 .ndo_set_mac_address = cvm_oct_common_set_mac_address,
634 .ndo_do_ioctl = cvm_oct_ioctl,
635 .ndo_change_mtu = cvm_oct_common_change_mtu,
636 .ndo_get_stats = cvm_oct_common_get_stats,
637 #ifdef CONFIG_NET_POLL_CONTROLLER
638 .ndo_poll_controller = cvm_oct_poll_controller,
639 #endif
640 };
641
642 static struct device_node *cvm_oct_of_get_child(
643 const struct device_node *parent, int reg_val)
644 {
645 struct device_node *node = NULL;
646 int size;
647 const __be32 *addr;
648
649 for (;;) {
650 node = of_get_next_child(parent, node);
651 if (!node)
652 break;
653 addr = of_get_property(node, "reg", &size);
654 if (addr && (be32_to_cpu(*addr) == reg_val))
655 break;
656 }
657 return node;
658 }
659
660 static struct device_node *cvm_oct_node_for_port(struct device_node *pip,
661 int interface, int port)
662 {
663 struct device_node *ni, *np;
664
665 ni = cvm_oct_of_get_child(pip, interface);
666 if (!ni)
667 return NULL;
668
669 np = cvm_oct_of_get_child(ni, port);
670 of_node_put(ni);
671
672 return np;
673 }
674
675 static int cvm_oct_probe(struct platform_device *pdev)
676 {
677 int num_interfaces;
678 int interface;
679 int fau = FAU_NUM_PACKET_BUFFERS_TO_FREE;
680 int qos;
681 struct device_node *pip;
682
683 octeon_mdiobus_force_mod_depencency();
684 pr_notice("cavium-ethernet %s\n", OCTEON_ETHERNET_VERSION);
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_poll_queue = create_singlethread_workqueue("octeon-ethernet");
693 if (cvm_oct_poll_queue == NULL) {
694 pr_err("octeon-ethernet: Cannot create workqueue");
695 return -ENOMEM;
696 }
697
698 cvm_oct_configure_common_hw();
699
700 cvmx_helper_initialize_packet_io_global();
701
702 /* Change the input group for all ports before input is enabled */
703 num_interfaces = cvmx_helper_get_number_of_interfaces();
704 for (interface = 0; interface < num_interfaces; interface++) {
705 int num_ports = cvmx_helper_ports_on_interface(interface);
706 int port;
707
708 for (port = cvmx_helper_get_ipd_port(interface, 0);
709 port < cvmx_helper_get_ipd_port(interface, num_ports);
710 port++) {
711 union cvmx_pip_prt_tagx pip_prt_tagx;
712
713 pip_prt_tagx.u64 =
714 cvmx_read_csr(CVMX_PIP_PRT_TAGX(port));
715 pip_prt_tagx.s.grp = pow_receive_group;
716 cvmx_write_csr(CVMX_PIP_PRT_TAGX(port),
717 pip_prt_tagx.u64);
718 }
719 }
720
721 cvmx_helper_ipd_and_packet_input_enable();
722
723 memset(cvm_oct_device, 0, sizeof(cvm_oct_device));
724
725 /*
726 * Initialize the FAU used for counting packet buffers that
727 * need to be freed.
728 */
729 cvmx_fau_atomic_write32(FAU_NUM_PACKET_BUFFERS_TO_FREE, 0);
730
731 /* Initialize the FAU used for counting tx SKBs that need to be freed */
732 cvmx_fau_atomic_write32(FAU_TOTAL_TX_TO_CLEAN, 0);
733
734 if ((pow_send_group != -1)) {
735 struct net_device *dev;
736
737 pr_info("\tConfiguring device for POW only access\n");
738 dev = alloc_etherdev(sizeof(struct octeon_ethernet));
739 if (dev) {
740 /* Initialize the device private structure. */
741 struct octeon_ethernet *priv = netdev_priv(dev);
742
743 dev->netdev_ops = &cvm_oct_pow_netdev_ops;
744 priv->imode = CVMX_HELPER_INTERFACE_MODE_DISABLED;
745 priv->port = CVMX_PIP_NUM_INPUT_PORTS;
746 priv->queue = -1;
747 strcpy(dev->name, "pow%d");
748 for (qos = 0; qos < 16; qos++)
749 skb_queue_head_init(&priv->tx_free_list[qos]);
750
751 if (register_netdev(dev) < 0) {
752 pr_err("Failed to register ethernet device for POW\n");
753 free_netdev(dev);
754 } else {
755 cvm_oct_device[CVMX_PIP_NUM_INPUT_PORTS] = dev;
756 pr_info("%s: POW send group %d, receive group %d\n",
757 dev->name, pow_send_group,
758 pow_receive_group);
759 }
760 } else {
761 pr_err("Failed to allocate ethernet device for POW\n");
762 }
763 }
764
765 num_interfaces = cvmx_helper_get_number_of_interfaces();
766 for (interface = 0; interface < num_interfaces; interface++) {
767 cvmx_helper_interface_mode_t imode =
768 cvmx_helper_interface_get_mode(interface);
769 int num_ports = cvmx_helper_ports_on_interface(interface);
770 int port;
771 int port_index;
772
773 for (port_index = 0,
774 port = cvmx_helper_get_ipd_port(interface, 0);
775 port < cvmx_helper_get_ipd_port(interface, num_ports);
776 port_index++, port++) {
777 struct octeon_ethernet *priv;
778 struct net_device *dev =
779 alloc_etherdev(sizeof(struct octeon_ethernet));
780 if (!dev) {
781 pr_err("Failed to allocate ethernet device for port %d\n",
782 port);
783 continue;
784 }
785
786 /* Initialize the device private structure. */
787 priv = netdev_priv(dev);
788 priv->netdev = dev;
789 priv->of_node = cvm_oct_node_for_port(pip, interface,
790 port_index);
791
792 INIT_DELAYED_WORK(&priv->port_periodic_work,
793 cvm_oct_periodic_worker);
794 priv->imode = imode;
795 priv->port = port;
796 priv->queue = cvmx_pko_get_base_queue(priv->port);
797 priv->fau = fau - cvmx_pko_get_num_queues(port) * 4;
798 for (qos = 0; qos < 16; qos++)
799 skb_queue_head_init(&priv->tx_free_list[qos]);
800 for (qos = 0; qos < cvmx_pko_get_num_queues(port);
801 qos++)
802 cvmx_fau_atomic_write32(priv->fau + qos * 4, 0);
803
804 switch (priv->imode) {
805
806 /* These types don't support ports to IPD/PKO */
807 case CVMX_HELPER_INTERFACE_MODE_DISABLED:
808 case CVMX_HELPER_INTERFACE_MODE_PCIE:
809 case CVMX_HELPER_INTERFACE_MODE_PICMG:
810 break;
811
812 case CVMX_HELPER_INTERFACE_MODE_NPI:
813 dev->netdev_ops = &cvm_oct_npi_netdev_ops;
814 strcpy(dev->name, "npi%d");
815 break;
816
817 case CVMX_HELPER_INTERFACE_MODE_XAUI:
818 dev->netdev_ops = &cvm_oct_xaui_netdev_ops;
819 strcpy(dev->name, "xaui%d");
820 break;
821
822 case CVMX_HELPER_INTERFACE_MODE_LOOP:
823 dev->netdev_ops = &cvm_oct_npi_netdev_ops;
824 strcpy(dev->name, "loop%d");
825 break;
826
827 case CVMX_HELPER_INTERFACE_MODE_SGMII:
828 dev->netdev_ops = &cvm_oct_sgmii_netdev_ops;
829 strcpy(dev->name, "eth%d");
830 break;
831
832 case CVMX_HELPER_INTERFACE_MODE_SPI:
833 dev->netdev_ops = &cvm_oct_spi_netdev_ops;
834 strcpy(dev->name, "spi%d");
835 break;
836
837 case CVMX_HELPER_INTERFACE_MODE_RGMII:
838 case CVMX_HELPER_INTERFACE_MODE_GMII:
839 dev->netdev_ops = &cvm_oct_rgmii_netdev_ops;
840 strcpy(dev->name, "eth%d");
841 break;
842 }
843
844 if (!dev->netdev_ops) {
845 free_netdev(dev);
846 } else if (register_netdev(dev) < 0) {
847 pr_err("Failed to register ethernet device for interface %d, port %d\n",
848 interface, priv->port);
849 free_netdev(dev);
850 } else {
851 cvm_oct_device[priv->port] = dev;
852 fau -=
853 cvmx_pko_get_num_queues(priv->port) *
854 sizeof(uint32_t);
855 queue_delayed_work(cvm_oct_poll_queue,
856 &priv->port_periodic_work, HZ);
857 }
858 }
859 }
860
861 cvm_oct_tx_initialize();
862 cvm_oct_rx_initialize();
863
864 /*
865 * 150 uS: about 10 1500-byte packets at 1GE.
866 */
867 cvm_oct_tx_poll_interval = 150 * (octeon_get_clock_rate() / 1000000);
868
869 queue_delayed_work(cvm_oct_poll_queue, &cvm_oct_rx_refill_work, HZ);
870
871 return 0;
872 }
873
874 static int cvm_oct_remove(struct platform_device *pdev)
875 {
876 int port;
877
878 /* Disable POW interrupt */
879 cvmx_write_csr(CVMX_POW_WQ_INT_THRX(pow_receive_group), 0);
880
881 cvmx_ipd_disable();
882
883 /* Free the interrupt handler */
884 free_irq(OCTEON_IRQ_WORKQ0 + pow_receive_group, cvm_oct_device);
885
886 atomic_inc_return(&cvm_oct_poll_queue_stopping);
887 cancel_delayed_work_sync(&cvm_oct_rx_refill_work);
888
889 cvm_oct_rx_shutdown();
890 cvm_oct_tx_shutdown();
891
892 cvmx_pko_disable();
893
894 /* Free the ethernet devices */
895 for (port = 0; port < TOTAL_NUMBER_OF_PORTS; port++) {
896 if (cvm_oct_device[port]) {
897 struct net_device *dev = cvm_oct_device[port];
898 struct octeon_ethernet *priv = netdev_priv(dev);
899
900 cancel_delayed_work_sync(&priv->port_periodic_work);
901
902 cvm_oct_tx_shutdown_dev(dev);
903 unregister_netdev(dev);
904 free_netdev(dev);
905 cvm_oct_device[port] = NULL;
906 }
907 }
908
909 destroy_workqueue(cvm_oct_poll_queue);
910
911 cvmx_pko_shutdown();
912
913 cvmx_ipd_free_ptr();
914
915 /* Free the HW pools */
916 cvm_oct_mem_empty_fpa(CVMX_FPA_PACKET_POOL, CVMX_FPA_PACKET_POOL_SIZE,
917 num_packet_buffers);
918 cvm_oct_mem_empty_fpa(CVMX_FPA_WQE_POOL, CVMX_FPA_WQE_POOL_SIZE,
919 num_packet_buffers);
920 if (CVMX_FPA_OUTPUT_BUFFER_POOL != CVMX_FPA_PACKET_POOL)
921 cvm_oct_mem_empty_fpa(CVMX_FPA_OUTPUT_BUFFER_POOL,
922 CVMX_FPA_OUTPUT_BUFFER_POOL_SIZE, 128);
923 return 0;
924 }
925
926 static const struct of_device_id cvm_oct_match[] = {
927 {
928 .compatible = "cavium,octeon-3860-pip",
929 },
930 {},
931 };
932 MODULE_DEVICE_TABLE(of, cvm_oct_match);
933
934 static struct platform_driver cvm_oct_driver = {
935 .probe = cvm_oct_probe,
936 .remove = cvm_oct_remove,
937 .driver = {
938 .name = KBUILD_MODNAME,
939 .of_match_table = cvm_oct_match,
940 },
941 };
942
943 module_platform_driver(cvm_oct_driver);
944
945 MODULE_LICENSE("GPL");
946 MODULE_AUTHOR("Cavium Networks <support@caviumnetworks.com>");
947 MODULE_DESCRIPTION("Cavium Networks Octeon ethernet driver.");
Linux kernel - Deliverables
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