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Merge branch 'smack-for-3.16' of git://git.gitorious.org/smack-next/kernel into next
[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 #if defined(CONFIG_CAVIUM_OCTEON_NUM_PACKET_BUFFERS) \
59 && CONFIG_CAVIUM_OCTEON_NUM_PACKET_BUFFERS
60 int num_packet_buffers = CONFIG_CAVIUM_OCTEON_NUM_PACKET_BUFFERS;
61 #else
62 int num_packet_buffers = 1024;
63 #endif
64 module_param(num_packet_buffers, int, 0444);
65 MODULE_PARM_DESC(num_packet_buffers, "\n"
66 "\tNumber of packet buffers to allocate and store in the\n"
67 "\tFPA. By default, 1024 packet buffers are used unless\n"
68 "\tCONFIG_CAVIUM_OCTEON_NUM_PACKET_BUFFERS is defined.");
69
70 int pow_receive_group = 15;
71 module_param(pow_receive_group, int, 0444);
72 MODULE_PARM_DESC(pow_receive_group, "\n"
73 "\tPOW group to receive packets from. All ethernet hardware\n"
74 "\twill be configured to send incoming packets to this POW\n"
75 "\tgroup. Also any other software can submit packets to this\n"
76 "\tgroup for the kernel to process.");
77
78 int pow_send_group = -1;
79 module_param(pow_send_group, int, 0644);
80 MODULE_PARM_DESC(pow_send_group, "\n"
81 "\tPOW group to send packets to other software on. This\n"
82 "\tcontrols the creation of the virtual device pow0.\n"
83 "\talways_use_pow also depends on this value.");
84
85 int always_use_pow;
86 module_param(always_use_pow, int, 0444);
87 MODULE_PARM_DESC(always_use_pow, "\n"
88 "\tWhen set, always send to the pow group. This will cause\n"
89 "\tpackets sent to real ethernet devices to be sent to the\n"
90 "\tPOW group instead of the hardware. Unless some other\n"
91 "\tapplication changes the config, packets will still be\n"
92 "\treceived from the low level hardware. Use this option\n"
93 "\tto allow a CVMX app to intercept all packets from the\n"
94 "\tlinux kernel. You must specify pow_send_group along with\n"
95 "\tthis option.");
96
97 char pow_send_list[128] = "";
98 module_param_string(pow_send_list, pow_send_list, sizeof(pow_send_list), 0444);
99 MODULE_PARM_DESC(pow_send_list, "\n"
100 "\tComma separated list of ethernet devices that should use the\n"
101 "\tPOW for transmit instead of the actual ethernet hardware. This\n"
102 "\tis a per port version of always_use_pow. always_use_pow takes\n"
103 "\tprecedence over this list. For example, setting this to\n"
104 "\t\"eth2,spi3,spi7\" would cause these three devices to transmit\n"
105 "\tusing the pow_send_group.");
106
107 int max_rx_cpus = -1;
108 module_param(max_rx_cpus, int, 0444);
109 MODULE_PARM_DESC(max_rx_cpus, "\n"
110 "\t\tThe maximum number of CPUs to use for packet reception.\n"
111 "\t\tUse -1 to use all available CPUs.");
112
113 int rx_napi_weight = 32;
114 module_param(rx_napi_weight, int, 0444);
115 MODULE_PARM_DESC(rx_napi_weight, "The NAPI WEIGHT parameter.");
116
117 /**
118 * cvm_oct_poll_queue - Workqueue for polling operations.
119 */
120 struct workqueue_struct *cvm_oct_poll_queue;
121
122 /**
123 * cvm_oct_poll_queue_stopping - flag to indicate polling should stop.
124 *
125 * Set to one right before cvm_oct_poll_queue is destroyed.
126 */
127 atomic_t cvm_oct_poll_queue_stopping = ATOMIC_INIT(0);
128
129 /**
130 * Array of every ethernet device owned by this driver indexed by
131 * the ipd input port number.
132 */
133 struct net_device *cvm_oct_device[TOTAL_NUMBER_OF_PORTS];
134
135 u64 cvm_oct_tx_poll_interval;
136
137 static void cvm_oct_rx_refill_worker(struct work_struct *work);
138 static DECLARE_DELAYED_WORK(cvm_oct_rx_refill_work, cvm_oct_rx_refill_worker);
139
140 static void cvm_oct_rx_refill_worker(struct work_struct *work)
141 {
142 /*
143 * FPA 0 may have been drained, try to refill it if we need
144 * more than num_packet_buffers / 2, otherwise normal receive
145 * processing will refill it. If it were drained, no packets
146 * could be received so cvm_oct_napi_poll would never be
147 * invoked to do the refill.
148 */
149 cvm_oct_rx_refill_pool(num_packet_buffers / 2);
150
151 if (!atomic_read(&cvm_oct_poll_queue_stopping))
152 queue_delayed_work(cvm_oct_poll_queue,
153 &cvm_oct_rx_refill_work, HZ);
154 }
155
156 static void cvm_oct_periodic_worker(struct work_struct *work)
157 {
158 struct octeon_ethernet *priv = container_of(work,
159 struct octeon_ethernet,
160 port_periodic_work.work);
161
162 if (priv->poll)
163 priv->poll(cvm_oct_device[priv->port]);
164
165 cvm_oct_device[priv->port]->netdev_ops->ndo_get_stats(
166 cvm_oct_device[priv->port]);
167
168 if (!atomic_read(&cvm_oct_poll_queue_stopping))
169 queue_delayed_work(cvm_oct_poll_queue,
170 &priv->port_periodic_work, HZ);
171 }
172
173 static void cvm_oct_configure_common_hw(void)
174 {
175 /* Setup the FPA */
176 cvmx_fpa_enable();
177 cvm_oct_mem_fill_fpa(CVMX_FPA_PACKET_POOL, CVMX_FPA_PACKET_POOL_SIZE,
178 num_packet_buffers);
179 cvm_oct_mem_fill_fpa(CVMX_FPA_WQE_POOL, CVMX_FPA_WQE_POOL_SIZE,
180 num_packet_buffers);
181 if (CVMX_FPA_OUTPUT_BUFFER_POOL != CVMX_FPA_PACKET_POOL)
182 cvm_oct_mem_fill_fpa(CVMX_FPA_OUTPUT_BUFFER_POOL,
183 CVMX_FPA_OUTPUT_BUFFER_POOL_SIZE, 128);
184
185 if (USE_RED)
186 cvmx_helper_setup_red(num_packet_buffers / 4,
187 num_packet_buffers / 8);
188
189 }
190
191 /**
192 * cvm_oct_free_work- Free a work queue entry
193 *
194 * @work_queue_entry: Work queue entry to free
195 *
196 * Returns Zero on success, Negative on failure.
197 */
198 int cvm_oct_free_work(void *work_queue_entry)
199 {
200 cvmx_wqe_t *work = work_queue_entry;
201
202 int segments = work->word2.s.bufs;
203 union cvmx_buf_ptr segment_ptr = work->packet_ptr;
204
205 while (segments--) {
206 union cvmx_buf_ptr next_ptr = *(union cvmx_buf_ptr *)
207 cvmx_phys_to_ptr(segment_ptr.s.addr - 8);
208 if (unlikely(!segment_ptr.s.i))
209 cvmx_fpa_free(cvm_oct_get_buffer_ptr(segment_ptr),
210 segment_ptr.s.pool,
211 DONT_WRITEBACK(CVMX_FPA_PACKET_POOL_SIZE /
212 128));
213 segment_ptr = next_ptr;
214 }
215 cvmx_fpa_free(work, CVMX_FPA_WQE_POOL, DONT_WRITEBACK(1));
216
217 return 0;
218 }
219 EXPORT_SYMBOL(cvm_oct_free_work);
220
221 /**
222 * cvm_oct_common_get_stats - get the low level ethernet statistics
223 * @dev: Device to get the statistics from
224 *
225 * Returns Pointer to the statistics
226 */
227 static struct net_device_stats *cvm_oct_common_get_stats(struct net_device *dev)
228 {
229 cvmx_pip_port_status_t rx_status;
230 cvmx_pko_port_status_t tx_status;
231 struct octeon_ethernet *priv = netdev_priv(dev);
232
233 if (priv->port < CVMX_PIP_NUM_INPUT_PORTS) {
234 if (octeon_is_simulation()) {
235 /* The simulator doesn't support statistics */
236 memset(&rx_status, 0, sizeof(rx_status));
237 memset(&tx_status, 0, sizeof(tx_status));
238 } else {
239 cvmx_pip_get_port_status(priv->port, 1, &rx_status);
240 cvmx_pko_get_port_status(priv->port, 1, &tx_status);
241 }
242
243 priv->stats.rx_packets += rx_status.inb_packets;
244 priv->stats.tx_packets += tx_status.packets;
245 priv->stats.rx_bytes += rx_status.inb_octets;
246 priv->stats.tx_bytes += tx_status.octets;
247 priv->stats.multicast += rx_status.multicast_packets;
248 priv->stats.rx_crc_errors += rx_status.inb_errors;
249 priv->stats.rx_frame_errors += rx_status.fcs_align_err_packets;
250
251 /*
252 * The drop counter must be incremented atomically
253 * since the RX tasklet also increments it.
254 */
255 #ifdef CONFIG_64BIT
256 atomic64_add(rx_status.dropped_packets,
257 (atomic64_t *)&priv->stats.rx_dropped);
258 #else
259 atomic_add(rx_status.dropped_packets,
260 (atomic_t *)&priv->stats.rx_dropped);
261 #endif
262 }
263
264 return &priv->stats;
265 }
266
267 /**
268 * cvm_oct_common_change_mtu - change the link MTU
269 * @dev: Device to change
270 * @new_mtu: The new MTU
271 *
272 * Returns Zero on success
273 */
274 static int cvm_oct_common_change_mtu(struct net_device *dev, int new_mtu)
275 {
276 struct octeon_ethernet *priv = netdev_priv(dev);
277 int interface = INTERFACE(priv->port);
278 int index = INDEX(priv->port);
279 #if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE)
280 int vlan_bytes = 4;
281 #else
282 int vlan_bytes = 0;
283 #endif
284
285 /*
286 * Limit the MTU to make sure the ethernet packets are between
287 * 64 bytes and 65535 bytes.
288 */
289 if ((new_mtu + 14 + 4 + vlan_bytes < 64)
290 || (new_mtu + 14 + 4 + vlan_bytes > 65392)) {
291 pr_err("MTU must be between %d and %d.\n",
292 64 - 14 - 4 - vlan_bytes, 65392 - 14 - 4 - vlan_bytes);
293 return -EINVAL;
294 }
295 dev->mtu = new_mtu;
296
297 if ((interface < 2)
298 && (cvmx_helper_interface_get_mode(interface) !=
299 CVMX_HELPER_INTERFACE_MODE_SPI)) {
300 /* Add ethernet header and FCS, and VLAN if configured. */
301 int max_packet = new_mtu + 14 + 4 + vlan_bytes;
302
303 if (OCTEON_IS_MODEL(OCTEON_CN3XXX)
304 || OCTEON_IS_MODEL(OCTEON_CN58XX)) {
305 /* Signal errors on packets larger than the MTU */
306 cvmx_write_csr(CVMX_GMXX_RXX_FRM_MAX(index, interface),
307 max_packet);
308 } else {
309 /*
310 * Set the hardware to truncate packets larger
311 * than the MTU and smaller the 64 bytes.
312 */
313 union cvmx_pip_frm_len_chkx frm_len_chk;
314 frm_len_chk.u64 = 0;
315 frm_len_chk.s.minlen = 64;
316 frm_len_chk.s.maxlen = max_packet;
317 cvmx_write_csr(CVMX_PIP_FRM_LEN_CHKX(interface),
318 frm_len_chk.u64);
319 }
320 /*
321 * Set the hardware to truncate packets larger than
322 * the MTU. The jabber register must be set to a
323 * multiple of 8 bytes, so round up.
324 */
325 cvmx_write_csr(CVMX_GMXX_RXX_JABBER(index, interface),
326 (max_packet + 7) & ~7u);
327 }
328 return 0;
329 }
330
331 /**
332 * cvm_oct_common_set_multicast_list - set the multicast list
333 * @dev: Device to work on
334 */
335 static void cvm_oct_common_set_multicast_list(struct net_device *dev)
336 {
337 union cvmx_gmxx_prtx_cfg gmx_cfg;
338 struct octeon_ethernet *priv = netdev_priv(dev);
339 int interface = INTERFACE(priv->port);
340 int index = INDEX(priv->port);
341
342 if ((interface < 2)
343 && (cvmx_helper_interface_get_mode(interface) !=
344 CVMX_HELPER_INTERFACE_MODE_SPI)) {
345 union cvmx_gmxx_rxx_adr_ctl control;
346 control.u64 = 0;
347 control.s.bcst = 1; /* Allow broadcast MAC addresses */
348
349 if (!netdev_mc_empty(dev) || (dev->flags & IFF_ALLMULTI) ||
350 (dev->flags & IFF_PROMISC))
351 /* Force accept multicast packets */
352 control.s.mcst = 2;
353 else
354 /* Force reject multicast packets */
355 control.s.mcst = 1;
356
357 if (dev->flags & IFF_PROMISC)
358 /*
359 * Reject matches if promisc. Since CAM is
360 * shut off, should accept everything.
361 */
362 control.s.cam_mode = 0;
363 else
364 /* Filter packets based on the CAM */
365 control.s.cam_mode = 1;
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_RXX_ADR_CTL(index, interface),
373 control.u64);
374 if (dev->flags & IFF_PROMISC)
375 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM_EN
376 (index, interface), 0);
377 else
378 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM_EN
379 (index, interface), 1);
380
381 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface),
382 gmx_cfg.u64);
383 }
384 }
385
386 /**
387 * cvm_oct_common_set_mac_address - set the hardware MAC address for a device
388 * @dev: The device in question.
389 * @addr: Address structure to change it too.
390
391 * Returns Zero on success
392 */
393 static int cvm_oct_set_mac_filter(struct net_device *dev)
394 {
395 struct octeon_ethernet *priv = netdev_priv(dev);
396 union cvmx_gmxx_prtx_cfg gmx_cfg;
397 int interface = INTERFACE(priv->port);
398 int index = INDEX(priv->port);
399
400 if ((interface < 2)
401 && (cvmx_helper_interface_get_mode(interface) !=
402 CVMX_HELPER_INTERFACE_MODE_SPI)) {
403 int i;
404 uint8_t *ptr = dev->dev_addr;
405 uint64_t mac = 0;
406 for (i = 0; i < 6; i++)
407 mac = (mac << 8) | (uint64_t)ptr[i];
408
409 gmx_cfg.u64 =
410 cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
411 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface),
412 gmx_cfg.u64 & ~1ull);
413
414 cvmx_write_csr(CVMX_GMXX_SMACX(index, interface), mac);
415 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM0(index, interface),
416 ptr[0]);
417 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM1(index, interface),
418 ptr[1]);
419 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM2(index, interface),
420 ptr[2]);
421 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM3(index, interface),
422 ptr[3]);
423 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM4(index, interface),
424 ptr[4]);
425 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM5(index, interface),
426 ptr[5]);
427 cvm_oct_common_set_multicast_list(dev);
428 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface),
429 gmx_cfg.u64);
430 }
431 return 0;
432 }
433
434 static int cvm_oct_common_set_mac_address(struct net_device *dev, void *addr)
435 {
436 int r = eth_mac_addr(dev, addr);
437
438 if (r)
439 return r;
440 return cvm_oct_set_mac_filter(dev);
441 }
442
443 /**
444 * cvm_oct_common_init - per network device initialization
445 * @dev: Device to initialize
446 *
447 * Returns Zero on success
448 */
449 int cvm_oct_common_init(struct net_device *dev)
450 {
451 struct octeon_ethernet *priv = netdev_priv(dev);
452 const u8 *mac = NULL;
453
454 if (priv->of_node)
455 mac = of_get_mac_address(priv->of_node);
456
457 if (mac)
458 memcpy(dev->dev_addr, mac, ETH_ALEN);
459 else
460 eth_hw_addr_random(dev);
461
462 /*
463 * Force the interface to use the POW send if always_use_pow
464 * was specified or it is in the pow send list.
465 */
466 if ((pow_send_group != -1)
467 && (always_use_pow || strstr(pow_send_list, dev->name)))
468 priv->queue = -1;
469
470 if (priv->queue != -1) {
471 dev->features |= NETIF_F_SG;
472 if (USE_HW_TCPUDP_CHECKSUM)
473 dev->features |= NETIF_F_IP_CSUM;
474 }
475
476 /* We do our own locking, Linux doesn't need to */
477 dev->features |= NETIF_F_LLTX;
478 SET_ETHTOOL_OPS(dev, &cvm_oct_ethtool_ops);
479
480 cvm_oct_phy_setup_device(dev);
481 cvm_oct_set_mac_filter(dev);
482 dev->netdev_ops->ndo_change_mtu(dev, dev->mtu);
483
484 /*
485 * Zero out stats for port so we won't mistakenly show
486 * counters from the bootloader.
487 */
488 memset(dev->netdev_ops->ndo_get_stats(dev), 0,
489 sizeof(struct net_device_stats));
490
491 return 0;
492 }
493
494 void cvm_oct_common_uninit(struct net_device *dev)
495 {
496 struct octeon_ethernet *priv = netdev_priv(dev);
497
498 if (priv->phydev)
499 phy_disconnect(priv->phydev);
500 }
501
502 static const struct net_device_ops cvm_oct_npi_netdev_ops = {
503 .ndo_init = cvm_oct_common_init,
504 .ndo_uninit = cvm_oct_common_uninit,
505 .ndo_start_xmit = cvm_oct_xmit,
506 .ndo_set_rx_mode = cvm_oct_common_set_multicast_list,
507 .ndo_set_mac_address = cvm_oct_common_set_mac_address,
508 .ndo_do_ioctl = cvm_oct_ioctl,
509 .ndo_change_mtu = cvm_oct_common_change_mtu,
510 .ndo_get_stats = cvm_oct_common_get_stats,
511 #ifdef CONFIG_NET_POLL_CONTROLLER
512 .ndo_poll_controller = cvm_oct_poll_controller,
513 #endif
514 };
515 static const struct net_device_ops cvm_oct_xaui_netdev_ops = {
516 .ndo_init = cvm_oct_xaui_init,
517 .ndo_uninit = cvm_oct_xaui_uninit,
518 .ndo_open = cvm_oct_xaui_open,
519 .ndo_stop = cvm_oct_xaui_stop,
520 .ndo_start_xmit = cvm_oct_xmit,
521 .ndo_set_rx_mode = cvm_oct_common_set_multicast_list,
522 .ndo_set_mac_address = cvm_oct_common_set_mac_address,
523 .ndo_do_ioctl = cvm_oct_ioctl,
524 .ndo_change_mtu = cvm_oct_common_change_mtu,
525 .ndo_get_stats = cvm_oct_common_get_stats,
526 #ifdef CONFIG_NET_POLL_CONTROLLER
527 .ndo_poll_controller = cvm_oct_poll_controller,
528 #endif
529 };
530 static const struct net_device_ops cvm_oct_sgmii_netdev_ops = {
531 .ndo_init = cvm_oct_sgmii_init,
532 .ndo_uninit = cvm_oct_sgmii_uninit,
533 .ndo_open = cvm_oct_sgmii_open,
534 .ndo_stop = cvm_oct_sgmii_stop,
535 .ndo_start_xmit = cvm_oct_xmit,
536 .ndo_set_rx_mode = cvm_oct_common_set_multicast_list,
537 .ndo_set_mac_address = cvm_oct_common_set_mac_address,
538 .ndo_do_ioctl = cvm_oct_ioctl,
539 .ndo_change_mtu = cvm_oct_common_change_mtu,
540 .ndo_get_stats = cvm_oct_common_get_stats,
541 #ifdef CONFIG_NET_POLL_CONTROLLER
542 .ndo_poll_controller = cvm_oct_poll_controller,
543 #endif
544 };
545 static const struct net_device_ops cvm_oct_spi_netdev_ops = {
546 .ndo_init = cvm_oct_spi_init,
547 .ndo_uninit = cvm_oct_spi_uninit,
548 .ndo_start_xmit = cvm_oct_xmit,
549 .ndo_set_rx_mode = cvm_oct_common_set_multicast_list,
550 .ndo_set_mac_address = cvm_oct_common_set_mac_address,
551 .ndo_do_ioctl = cvm_oct_ioctl,
552 .ndo_change_mtu = cvm_oct_common_change_mtu,
553 .ndo_get_stats = cvm_oct_common_get_stats,
554 #ifdef CONFIG_NET_POLL_CONTROLLER
555 .ndo_poll_controller = cvm_oct_poll_controller,
556 #endif
557 };
558 static const struct net_device_ops cvm_oct_rgmii_netdev_ops = {
559 .ndo_init = cvm_oct_rgmii_init,
560 .ndo_uninit = cvm_oct_rgmii_uninit,
561 .ndo_open = cvm_oct_rgmii_open,
562 .ndo_stop = cvm_oct_rgmii_stop,
563 .ndo_start_xmit = cvm_oct_xmit,
564 .ndo_set_rx_mode = cvm_oct_common_set_multicast_list,
565 .ndo_set_mac_address = cvm_oct_common_set_mac_address,
566 .ndo_do_ioctl = cvm_oct_ioctl,
567 .ndo_change_mtu = cvm_oct_common_change_mtu,
568 .ndo_get_stats = cvm_oct_common_get_stats,
569 #ifdef CONFIG_NET_POLL_CONTROLLER
570 .ndo_poll_controller = cvm_oct_poll_controller,
571 #endif
572 };
573 static const struct net_device_ops cvm_oct_pow_netdev_ops = {
574 .ndo_init = cvm_oct_common_init,
575 .ndo_start_xmit = cvm_oct_xmit_pow,
576 .ndo_set_rx_mode = cvm_oct_common_set_multicast_list,
577 .ndo_set_mac_address = cvm_oct_common_set_mac_address,
578 .ndo_do_ioctl = cvm_oct_ioctl,
579 .ndo_change_mtu = cvm_oct_common_change_mtu,
580 .ndo_get_stats = cvm_oct_common_get_stats,
581 #ifdef CONFIG_NET_POLL_CONTROLLER
582 .ndo_poll_controller = cvm_oct_poll_controller,
583 #endif
584 };
585
586 extern void octeon_mdiobus_force_mod_depencency(void);
587
588 static struct device_node *cvm_oct_of_get_child(
589 const struct device_node *parent, int reg_val)
590 {
591 struct device_node *node = NULL;
592 int size;
593 const __be32 *addr;
594
595 for (;;) {
596 node = of_get_next_child(parent, node);
597 if (!node)
598 break;
599 addr = of_get_property(node, "reg", &size);
600 if (addr && (be32_to_cpu(*addr) == reg_val))
601 break;
602 }
603 return node;
604 }
605
606 static struct device_node *cvm_oct_node_for_port(struct device_node *pip,
607 int interface, int port)
608 {
609 struct device_node *ni, *np;
610
611 ni = cvm_oct_of_get_child(pip, interface);
612 if (!ni)
613 return NULL;
614
615 np = cvm_oct_of_get_child(ni, port);
616 of_node_put(ni);
617
618 return np;
619 }
620
621 static int cvm_oct_probe(struct platform_device *pdev)
622 {
623 int num_interfaces;
624 int interface;
625 int fau = FAU_NUM_PACKET_BUFFERS_TO_FREE;
626 int qos;
627 struct device_node *pip;
628
629 octeon_mdiobus_force_mod_depencency();
630 pr_notice("cavium-ethernet %s\n", OCTEON_ETHERNET_VERSION);
631
632 pip = pdev->dev.of_node;
633 if (!pip) {
634 pr_err("Error: No 'pip' in /aliases\n");
635 return -EINVAL;
636 }
637
638 cvm_oct_poll_queue = create_singlethread_workqueue("octeon-ethernet");
639 if (cvm_oct_poll_queue == NULL) {
640 pr_err("octeon-ethernet: Cannot create workqueue");
641 return -ENOMEM;
642 }
643
644 cvm_oct_configure_common_hw();
645
646 cvmx_helper_initialize_packet_io_global();
647
648 /* Change the input group for all ports before input is enabled */
649 num_interfaces = cvmx_helper_get_number_of_interfaces();
650 for (interface = 0; interface < num_interfaces; interface++) {
651 int num_ports = cvmx_helper_ports_on_interface(interface);
652 int port;
653
654 for (port = cvmx_helper_get_ipd_port(interface, 0);
655 port < cvmx_helper_get_ipd_port(interface, num_ports);
656 port++) {
657 union cvmx_pip_prt_tagx pip_prt_tagx;
658 pip_prt_tagx.u64 =
659 cvmx_read_csr(CVMX_PIP_PRT_TAGX(port));
660 pip_prt_tagx.s.grp = pow_receive_group;
661 cvmx_write_csr(CVMX_PIP_PRT_TAGX(port),
662 pip_prt_tagx.u64);
663 }
664 }
665
666 cvmx_helper_ipd_and_packet_input_enable();
667
668 memset(cvm_oct_device, 0, sizeof(cvm_oct_device));
669
670 /*
671 * Initialize the FAU used for counting packet buffers that
672 * need to be freed.
673 */
674 cvmx_fau_atomic_write32(FAU_NUM_PACKET_BUFFERS_TO_FREE, 0);
675
676 /* Initialize the FAU used for counting tx SKBs that need to be freed */
677 cvmx_fau_atomic_write32(FAU_TOTAL_TX_TO_CLEAN, 0);
678
679 if ((pow_send_group != -1)) {
680 struct net_device *dev;
681 pr_info("\tConfiguring device for POW only access\n");
682 dev = alloc_etherdev(sizeof(struct octeon_ethernet));
683 if (dev) {
684 /* Initialize the device private structure. */
685 struct octeon_ethernet *priv = netdev_priv(dev);
686
687 dev->netdev_ops = &cvm_oct_pow_netdev_ops;
688 priv->imode = CVMX_HELPER_INTERFACE_MODE_DISABLED;
689 priv->port = CVMX_PIP_NUM_INPUT_PORTS;
690 priv->queue = -1;
691 strcpy(dev->name, "pow%d");
692 for (qos = 0; qos < 16; qos++)
693 skb_queue_head_init(&priv->tx_free_list[qos]);
694
695 if (register_netdev(dev) < 0) {
696 pr_err("Failed to register ethernet device for POW\n");
697 free_netdev(dev);
698 } else {
699 cvm_oct_device[CVMX_PIP_NUM_INPUT_PORTS] = dev;
700 pr_info("%s: POW send group %d, receive group %d\n",
701 dev->name, pow_send_group,
702 pow_receive_group);
703 }
704 } else {
705 pr_err("Failed to allocate ethernet device for POW\n");
706 }
707 }
708
709 num_interfaces = cvmx_helper_get_number_of_interfaces();
710 for (interface = 0; interface < num_interfaces; interface++) {
711 cvmx_helper_interface_mode_t imode =
712 cvmx_helper_interface_get_mode(interface);
713 int num_ports = cvmx_helper_ports_on_interface(interface);
714 int port;
715 int port_index;
716
717 for (port_index = 0,
718 port = cvmx_helper_get_ipd_port(interface, 0);
719 port < cvmx_helper_get_ipd_port(interface, num_ports);
720 port_index++, port++) {
721 struct octeon_ethernet *priv;
722 struct net_device *dev =
723 alloc_etherdev(sizeof(struct octeon_ethernet));
724 if (!dev) {
725 pr_err("Failed to allocate ethernet device for port %d\n", port);
726 continue;
727 }
728
729 /* Initialize the device private structure. */
730 priv = netdev_priv(dev);
731 priv->of_node = cvm_oct_node_for_port(pip, interface,
732 port_index);
733
734 INIT_DELAYED_WORK(&priv->port_periodic_work,
735 cvm_oct_periodic_worker);
736 priv->imode = imode;
737 priv->port = port;
738 priv->queue = cvmx_pko_get_base_queue(priv->port);
739 priv->fau = fau - cvmx_pko_get_num_queues(port) * 4;
740 for (qos = 0; qos < 16; qos++)
741 skb_queue_head_init(&priv->tx_free_list[qos]);
742 for (qos = 0; qos < cvmx_pko_get_num_queues(port);
743 qos++)
744 cvmx_fau_atomic_write32(priv->fau + qos * 4, 0);
745
746 switch (priv->imode) {
747
748 /* These types don't support ports to IPD/PKO */
749 case CVMX_HELPER_INTERFACE_MODE_DISABLED:
750 case CVMX_HELPER_INTERFACE_MODE_PCIE:
751 case CVMX_HELPER_INTERFACE_MODE_PICMG:
752 break;
753
754 case CVMX_HELPER_INTERFACE_MODE_NPI:
755 dev->netdev_ops = &cvm_oct_npi_netdev_ops;
756 strcpy(dev->name, "npi%d");
757 break;
758
759 case CVMX_HELPER_INTERFACE_MODE_XAUI:
760 dev->netdev_ops = &cvm_oct_xaui_netdev_ops;
761 strcpy(dev->name, "xaui%d");
762 break;
763
764 case CVMX_HELPER_INTERFACE_MODE_LOOP:
765 dev->netdev_ops = &cvm_oct_npi_netdev_ops;
766 strcpy(dev->name, "loop%d");
767 break;
768
769 case CVMX_HELPER_INTERFACE_MODE_SGMII:
770 dev->netdev_ops = &cvm_oct_sgmii_netdev_ops;
771 strcpy(dev->name, "eth%d");
772 break;
773
774 case CVMX_HELPER_INTERFACE_MODE_SPI:
775 dev->netdev_ops = &cvm_oct_spi_netdev_ops;
776 strcpy(dev->name, "spi%d");
777 break;
778
779 case CVMX_HELPER_INTERFACE_MODE_RGMII:
780 case CVMX_HELPER_INTERFACE_MODE_GMII:
781 dev->netdev_ops = &cvm_oct_rgmii_netdev_ops;
782 strcpy(dev->name, "eth%d");
783 break;
784 }
785
786 if (!dev->netdev_ops) {
787 free_netdev(dev);
788 } else if (register_netdev(dev) < 0) {
789 pr_err("Failed to register ethernet device "
790 "for interface %d, port %d\n",
791 interface, priv->port);
792 free_netdev(dev);
793 } else {
794 cvm_oct_device[priv->port] = dev;
795 fau -=
796 cvmx_pko_get_num_queues(priv->port) *
797 sizeof(uint32_t);
798 queue_delayed_work(cvm_oct_poll_queue,
799 &priv->port_periodic_work, HZ);
800 }
801 }
802 }
803
804 cvm_oct_tx_initialize();
805 cvm_oct_rx_initialize();
806
807 /*
808 * 150 uS: about 10 1500-byte packtes at 1GE.
809 */
810 cvm_oct_tx_poll_interval = 150 * (octeon_get_clock_rate() / 1000000);
811
812 queue_delayed_work(cvm_oct_poll_queue, &cvm_oct_rx_refill_work, HZ);
813
814 return 0;
815 }
816
817 static int cvm_oct_remove(struct platform_device *pdev)
818 {
819 int port;
820
821 /* Disable POW interrupt */
822 cvmx_write_csr(CVMX_POW_WQ_INT_THRX(pow_receive_group), 0);
823
824 cvmx_ipd_disable();
825
826 /* Free the interrupt handler */
827 free_irq(OCTEON_IRQ_WORKQ0 + pow_receive_group, cvm_oct_device);
828
829 atomic_inc_return(&cvm_oct_poll_queue_stopping);
830 cancel_delayed_work_sync(&cvm_oct_rx_refill_work);
831
832 cvm_oct_rx_shutdown();
833 cvm_oct_tx_shutdown();
834
835 cvmx_pko_disable();
836
837 /* Free the ethernet devices */
838 for (port = 0; port < TOTAL_NUMBER_OF_PORTS; port++) {
839 if (cvm_oct_device[port]) {
840 struct net_device *dev = cvm_oct_device[port];
841 struct octeon_ethernet *priv = netdev_priv(dev);
842 cancel_delayed_work_sync(&priv->port_periodic_work);
843
844 cvm_oct_tx_shutdown_dev(dev);
845 unregister_netdev(dev);
846 free_netdev(dev);
847 cvm_oct_device[port] = NULL;
848 }
849 }
850
851 destroy_workqueue(cvm_oct_poll_queue);
852
853 cvmx_pko_shutdown();
854
855 cvmx_ipd_free_ptr();
856
857 /* Free the HW pools */
858 cvm_oct_mem_empty_fpa(CVMX_FPA_PACKET_POOL, CVMX_FPA_PACKET_POOL_SIZE,
859 num_packet_buffers);
860 cvm_oct_mem_empty_fpa(CVMX_FPA_WQE_POOL, CVMX_FPA_WQE_POOL_SIZE,
861 num_packet_buffers);
862 if (CVMX_FPA_OUTPUT_BUFFER_POOL != CVMX_FPA_PACKET_POOL)
863 cvm_oct_mem_empty_fpa(CVMX_FPA_OUTPUT_BUFFER_POOL,
864 CVMX_FPA_OUTPUT_BUFFER_POOL_SIZE, 128);
865 return 0;
866 }
867
868 static struct of_device_id cvm_oct_match[] = {
869 {
870 .compatible = "cavium,octeon-3860-pip",
871 },
872 {},
873 };
874 MODULE_DEVICE_TABLE(of, cvm_oct_match);
875
876 static struct platform_driver cvm_oct_driver = {
877 .probe = cvm_oct_probe,
878 .remove = cvm_oct_remove,
879 .driver = {
880 .owner = THIS_MODULE,
881 .name = KBUILD_MODNAME,
882 .of_match_table = cvm_oct_match,
883 },
884 };
885
886 module_platform_driver(cvm_oct_driver);
887
888 MODULE_LICENSE("GPL");
889 MODULE_AUTHOR("Cavium Networks <support@caviumnetworks.com>");
890 MODULE_DESCRIPTION("Cavium Networks Octeon ethernet driver.");
Linux kernel - Deliverables
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