?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
powerpc/powernv: Rename alloc_m64_pe() to reserve_m64_pe()
[linux/fpc-iii.git] / drivers / staging / octeon / ethernet.c
blob8f9e3fb4871d0870e2c88918214482775538511d
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 max_rx_cpus = -1;
102 module_param(max_rx_cpus, int, 0444);
103 MODULE_PARM_DESC(max_rx_cpus, "\n"
104 "\t\tThe maximum number of CPUs to use for packet reception.\n"
105 "\t\tUse -1 to use all available CPUs.");
106
107 int rx_napi_weight = 32;
108 module_param(rx_napi_weight, int, 0444);
109 MODULE_PARM_DESC(rx_napi_weight, "The NAPI WEIGHT parameter.");
110
111 /**
112 * cvm_oct_poll_queue - Workqueue for polling operations.
113 */
114 struct workqueue_struct *cvm_oct_poll_queue;
115
116 /**
117 * cvm_oct_poll_queue_stopping - flag to indicate polling should stop.
118 *
119 * Set to one right before cvm_oct_poll_queue is destroyed.
120 */
121 atomic_t cvm_oct_poll_queue_stopping = ATOMIC_INIT(0);
122
123 /**
124 * Array of every ethernet device owned by this driver indexed by
125 * the ipd input port number.
126 */
127 struct net_device *cvm_oct_device[TOTAL_NUMBER_OF_PORTS];
128
129 u64 cvm_oct_tx_poll_interval;
130
131 static void cvm_oct_rx_refill_worker(struct work_struct *work);
132 static DECLARE_DELAYED_WORK(cvm_oct_rx_refill_work, cvm_oct_rx_refill_worker);
133
134 static void cvm_oct_rx_refill_worker(struct work_struct *work)
135 {
136 /*
137 * FPA 0 may have been drained, try to refill it if we need
138 * more than num_packet_buffers / 2, otherwise normal receive
139 * processing will refill it. If it were drained, no packets
140 * could be received so cvm_oct_napi_poll would never be
141 * invoked to do the refill.
142 */
143 cvm_oct_rx_refill_pool(num_packet_buffers / 2);
144
145 if (!atomic_read(&cvm_oct_poll_queue_stopping))
146 queue_delayed_work(cvm_oct_poll_queue,
147 &cvm_oct_rx_refill_work, HZ);
148 }
149
150 static void cvm_oct_periodic_worker(struct work_struct *work)
151 {
152 struct octeon_ethernet *priv = container_of(work,
153 struct octeon_ethernet,
154 port_periodic_work.work);
155
156 if (priv->poll)
157 priv->poll(cvm_oct_device[priv->port]);
158
159 cvm_oct_device[priv->port]->netdev_ops->ndo_get_stats(
160 cvm_oct_device[priv->port]);
161
162 if (!atomic_read(&cvm_oct_poll_queue_stopping))
163 queue_delayed_work(cvm_oct_poll_queue,
164 &priv->port_periodic_work, HZ);
165 }
166
167 static void cvm_oct_configure_common_hw(void)
168 {
169 /* Setup the FPA */
170 cvmx_fpa_enable();
171 cvm_oct_mem_fill_fpa(CVMX_FPA_PACKET_POOL, CVMX_FPA_PACKET_POOL_SIZE,
172 num_packet_buffers);
173 cvm_oct_mem_fill_fpa(CVMX_FPA_WQE_POOL, CVMX_FPA_WQE_POOL_SIZE,
174 num_packet_buffers);
175 if (CVMX_FPA_OUTPUT_BUFFER_POOL != CVMX_FPA_PACKET_POOL)
176 cvm_oct_mem_fill_fpa(CVMX_FPA_OUTPUT_BUFFER_POOL,
177 CVMX_FPA_OUTPUT_BUFFER_POOL_SIZE, 128);
178
179 if (USE_RED)
180 cvmx_helper_setup_red(num_packet_buffers / 4,
181 num_packet_buffers / 8);
182
183 }
184
185 /**
186 * cvm_oct_free_work- Free a work queue entry
187 *
188 * @work_queue_entry: Work queue entry to free
189 *
190 * Returns Zero on success, Negative on failure.
191 */
192 int cvm_oct_free_work(void *work_queue_entry)
193 {
194 cvmx_wqe_t *work = work_queue_entry;
195
196 int segments = work->word2.s.bufs;
197 union cvmx_buf_ptr segment_ptr = work->packet_ptr;
198
199 while (segments--) {
200 union cvmx_buf_ptr next_ptr = *(union cvmx_buf_ptr *)
201 cvmx_phys_to_ptr(segment_ptr.s.addr - 8);
202 if (unlikely(!segment_ptr.s.i))
203 cvmx_fpa_free(cvm_oct_get_buffer_ptr(segment_ptr),
204 segment_ptr.s.pool,
205 DONT_WRITEBACK(CVMX_FPA_PACKET_POOL_SIZE /
206 128));
207 segment_ptr = next_ptr;
208 }
209 cvmx_fpa_free(work, CVMX_FPA_WQE_POOL, DONT_WRITEBACK(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 memcpy(dev->dev_addr, mac, ETH_ALEN);
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;
469 if (USE_HW_TCPUDP_CHECKSUM)
470 dev->features |= NETIF_F_IP_CSUM;
471 }
472
473 /* We do our own locking, Linux doesn't need to */
474 dev->features |= NETIF_F_LLTX;
475 dev->ethtool_ops = &cvm_oct_ethtool_ops;
476
477 cvm_oct_set_mac_filter(dev);
478 dev->netdev_ops->ndo_change_mtu(dev, dev->mtu);
479
480 /*
481 * Zero out stats for port so we won't mistakenly show
482 * counters from the bootloader.
483 */
484 memset(dev->netdev_ops->ndo_get_stats(dev), 0,
485 sizeof(struct net_device_stats));
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 static const struct net_device_ops cvm_oct_npi_netdev_ops = {
499 .ndo_init = cvm_oct_common_init,
500 .ndo_uninit = cvm_oct_common_uninit,
501 .ndo_start_xmit = cvm_oct_xmit,
502 .ndo_set_rx_mode = cvm_oct_common_set_multicast_list,
503 .ndo_set_mac_address = cvm_oct_common_set_mac_address,
504 .ndo_do_ioctl = cvm_oct_ioctl,
505 .ndo_change_mtu = cvm_oct_common_change_mtu,
506 .ndo_get_stats = cvm_oct_common_get_stats,
507 #ifdef CONFIG_NET_POLL_CONTROLLER
508 .ndo_poll_controller = cvm_oct_poll_controller,
509 #endif
510 };
511 static const struct net_device_ops cvm_oct_xaui_netdev_ops = {
512 .ndo_init = cvm_oct_xaui_init,
513 .ndo_uninit = cvm_oct_xaui_uninit,
514 .ndo_open = cvm_oct_xaui_open,
515 .ndo_stop = cvm_oct_xaui_stop,
516 .ndo_start_xmit = cvm_oct_xmit,
517 .ndo_set_rx_mode = cvm_oct_common_set_multicast_list,
518 .ndo_set_mac_address = cvm_oct_common_set_mac_address,
519 .ndo_do_ioctl = cvm_oct_ioctl,
520 .ndo_change_mtu = cvm_oct_common_change_mtu,
521 .ndo_get_stats = cvm_oct_common_get_stats,
522 #ifdef CONFIG_NET_POLL_CONTROLLER
523 .ndo_poll_controller = cvm_oct_poll_controller,
524 #endif
525 };
526 static const struct net_device_ops cvm_oct_sgmii_netdev_ops = {
527 .ndo_init = cvm_oct_sgmii_init,
528 .ndo_uninit = cvm_oct_sgmii_uninit,
529 .ndo_open = cvm_oct_sgmii_open,
530 .ndo_stop = cvm_oct_sgmii_stop,
531 .ndo_start_xmit = cvm_oct_xmit,
532 .ndo_set_rx_mode = cvm_oct_common_set_multicast_list,
533 .ndo_set_mac_address = cvm_oct_common_set_mac_address,
534 .ndo_do_ioctl = cvm_oct_ioctl,
535 .ndo_change_mtu = cvm_oct_common_change_mtu,
536 .ndo_get_stats = cvm_oct_common_get_stats,
537 #ifdef CONFIG_NET_POLL_CONTROLLER
538 .ndo_poll_controller = cvm_oct_poll_controller,
539 #endif
540 };
541 static const struct net_device_ops cvm_oct_spi_netdev_ops = {
542 .ndo_init = cvm_oct_spi_init,
543 .ndo_uninit = cvm_oct_spi_uninit,
544 .ndo_start_xmit = cvm_oct_xmit,
545 .ndo_set_rx_mode = cvm_oct_common_set_multicast_list,
546 .ndo_set_mac_address = cvm_oct_common_set_mac_address,
547 .ndo_do_ioctl = cvm_oct_ioctl,
548 .ndo_change_mtu = cvm_oct_common_change_mtu,
549 .ndo_get_stats = cvm_oct_common_get_stats,
550 #ifdef CONFIG_NET_POLL_CONTROLLER
551 .ndo_poll_controller = cvm_oct_poll_controller,
552 #endif
553 };
554 static const struct net_device_ops cvm_oct_rgmii_netdev_ops = {
555 .ndo_init = cvm_oct_rgmii_init,
556 .ndo_uninit = cvm_oct_rgmii_uninit,
557 .ndo_open = cvm_oct_rgmii_open,
558 .ndo_stop = cvm_oct_rgmii_stop,
559 .ndo_start_xmit = cvm_oct_xmit,
560 .ndo_set_rx_mode = cvm_oct_common_set_multicast_list,
561 .ndo_set_mac_address = cvm_oct_common_set_mac_address,
562 .ndo_do_ioctl = cvm_oct_ioctl,
563 .ndo_change_mtu = cvm_oct_common_change_mtu,
564 .ndo_get_stats = cvm_oct_common_get_stats,
565 #ifdef CONFIG_NET_POLL_CONTROLLER
566 .ndo_poll_controller = cvm_oct_poll_controller,
567 #endif
568 };
569 static const struct net_device_ops cvm_oct_pow_netdev_ops = {
570 .ndo_init = cvm_oct_common_init,
571 .ndo_start_xmit = cvm_oct_xmit_pow,
572 .ndo_set_rx_mode = cvm_oct_common_set_multicast_list,
573 .ndo_set_mac_address = cvm_oct_common_set_mac_address,
574 .ndo_do_ioctl = cvm_oct_ioctl,
575 .ndo_change_mtu = cvm_oct_common_change_mtu,
576 .ndo_get_stats = cvm_oct_common_get_stats,
577 #ifdef CONFIG_NET_POLL_CONTROLLER
578 .ndo_poll_controller = cvm_oct_poll_controller,
579 #endif
580 };
581
582 extern void octeon_mdiobus_force_mod_depencency(void);
583
584 static struct device_node *cvm_oct_of_get_child(
585 const struct device_node *parent, int reg_val)
586 {
587 struct device_node *node = NULL;
588 int size;
589 const __be32 *addr;
590
591 for (;;) {
592 node = of_get_next_child(parent, node);
593 if (!node)
594 break;
595 addr = of_get_property(node, "reg", &size);
596 if (addr && (be32_to_cpu(*addr) == reg_val))
597 break;
598 }
599 return node;
600 }
601
602 static struct device_node *cvm_oct_node_for_port(struct device_node *pip,
603 int interface, int port)
604 {
605 struct device_node *ni, *np;
606
607 ni = cvm_oct_of_get_child(pip, interface);
608 if (!ni)
609 return NULL;
610
611 np = cvm_oct_of_get_child(ni, port);
612 of_node_put(ni);
613
614 return np;
615 }
616
617 static int cvm_oct_probe(struct platform_device *pdev)
618 {
619 int num_interfaces;
620 int interface;
621 int fau = FAU_NUM_PACKET_BUFFERS_TO_FREE;
622 int qos;
623 struct device_node *pip;
624
625 octeon_mdiobus_force_mod_depencency();
626 pr_notice("cavium-ethernet %s\n", OCTEON_ETHERNET_VERSION);
627
628 pip = pdev->dev.of_node;
629 if (!pip) {
630 pr_err("Error: No 'pip' in /aliases\n");
631 return -EINVAL;
632 }
633
634 cvm_oct_poll_queue = create_singlethread_workqueue("octeon-ethernet");
635 if (cvm_oct_poll_queue == NULL) {
636 pr_err("octeon-ethernet: Cannot create workqueue");
637 return -ENOMEM;
638 }
639
640 cvm_oct_configure_common_hw();
641
642 cvmx_helper_initialize_packet_io_global();
643
644 /* Change the input group for all ports before input is enabled */
645 num_interfaces = cvmx_helper_get_number_of_interfaces();
646 for (interface = 0; interface < num_interfaces; interface++) {
647 int num_ports = cvmx_helper_ports_on_interface(interface);
648 int port;
649
650 for (port = cvmx_helper_get_ipd_port(interface, 0);
651 port < cvmx_helper_get_ipd_port(interface, num_ports);
652 port++) {
653 union cvmx_pip_prt_tagx pip_prt_tagx;
654
655 pip_prt_tagx.u64 =
656 cvmx_read_csr(CVMX_PIP_PRT_TAGX(port));
657 pip_prt_tagx.s.grp = pow_receive_group;
658 cvmx_write_csr(CVMX_PIP_PRT_TAGX(port),
659 pip_prt_tagx.u64);
660 }
661 }
662
663 cvmx_helper_ipd_and_packet_input_enable();
664
665 memset(cvm_oct_device, 0, sizeof(cvm_oct_device));
666
667 /*
668 * Initialize the FAU used for counting packet buffers that
669 * need to be freed.
670 */
671 cvmx_fau_atomic_write32(FAU_NUM_PACKET_BUFFERS_TO_FREE, 0);
672
673 /* Initialize the FAU used for counting tx SKBs that need to be freed */
674 cvmx_fau_atomic_write32(FAU_TOTAL_TX_TO_CLEAN, 0);
675
676 if ((pow_send_group != -1)) {
677 struct net_device *dev;
678
679 pr_info("\tConfiguring device for POW only access\n");
680 dev = alloc_etherdev(sizeof(struct octeon_ethernet));
681 if (dev) {
682 /* Initialize the device private structure. */
683 struct octeon_ethernet *priv = netdev_priv(dev);
684
685 dev->netdev_ops = &cvm_oct_pow_netdev_ops;
686 priv->imode = CVMX_HELPER_INTERFACE_MODE_DISABLED;
687 priv->port = CVMX_PIP_NUM_INPUT_PORTS;
688 priv->queue = -1;
689 strcpy(dev->name, "pow%d");
690 for (qos = 0; qos < 16; qos++)
691 skb_queue_head_init(&priv->tx_free_list[qos]);
692
693 if (register_netdev(dev) < 0) {
694 pr_err("Failed to register ethernet device for POW\n");
695 free_netdev(dev);
696 } else {
697 cvm_oct_device[CVMX_PIP_NUM_INPUT_PORTS] = dev;
698 pr_info("%s: POW send group %d, receive group %d\n",
699 dev->name, pow_send_group,
700 pow_receive_group);
701 }
702 } else {
703 pr_err("Failed to allocate ethernet device for POW\n");
704 }
705 }
706
707 num_interfaces = cvmx_helper_get_number_of_interfaces();
708 for (interface = 0; interface < num_interfaces; interface++) {
709 cvmx_helper_interface_mode_t imode =
710 cvmx_helper_interface_get_mode(interface);
711 int num_ports = cvmx_helper_ports_on_interface(interface);
712 int port;
713 int port_index;
714
715 for (port_index = 0,
716 port = cvmx_helper_get_ipd_port(interface, 0);
717 port < cvmx_helper_get_ipd_port(interface, num_ports);
718 port_index++, port++) {
719 struct octeon_ethernet *priv;
720 struct net_device *dev =
721 alloc_etherdev(sizeof(struct octeon_ethernet));
722 if (!dev) {
723 pr_err("Failed to allocate ethernet device for port %d\n",
724 port);
725 continue;
726 }
727
728 /* Initialize the device private structure. */
729 priv = netdev_priv(dev);
730 priv->netdev = 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 for interface %d, port %d\n",
790 interface, priv->port);
791 free_netdev(dev);
792 } else {
793 cvm_oct_device[priv->port] = dev;
794 fau -=
795 cvmx_pko_get_num_queues(priv->port) *
796 sizeof(uint32_t);
797 queue_delayed_work(cvm_oct_poll_queue,
798 &priv->port_periodic_work, HZ);
799 }
800 }
801 }
802
803 cvm_oct_tx_initialize();
804 cvm_oct_rx_initialize();
805
806 /*
807 * 150 uS: about 10 1500-byte packtes at 1GE.
808 */
809 cvm_oct_tx_poll_interval = 150 * (octeon_get_clock_rate() / 1000000);
810
811 queue_delayed_work(cvm_oct_poll_queue, &cvm_oct_rx_refill_work, HZ);
812
813 return 0;
814 }
815
816 static int cvm_oct_remove(struct platform_device *pdev)
817 {
818 int port;
819
820 /* Disable POW interrupt */
821 cvmx_write_csr(CVMX_POW_WQ_INT_THRX(pow_receive_group), 0);
822
823 cvmx_ipd_disable();
824
825 /* Free the interrupt handler */
826 free_irq(OCTEON_IRQ_WORKQ0 + pow_receive_group, cvm_oct_device);
827
828 atomic_inc_return(&cvm_oct_poll_queue_stopping);
829 cancel_delayed_work_sync(&cvm_oct_rx_refill_work);
830
831 cvm_oct_rx_shutdown();
832 cvm_oct_tx_shutdown();
833
834 cvmx_pko_disable();
835
836 /* Free the ethernet devices */
837 for (port = 0; port < TOTAL_NUMBER_OF_PORTS; port++) {
838 if (cvm_oct_device[port]) {
839 struct net_device *dev = cvm_oct_device[port];
840 struct octeon_ethernet *priv = netdev_priv(dev);
841
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 with added FPC-III support