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Merge git://git.infradead.org/users/willy/linux-nvme
[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 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 frm_len_chk.u64 = 0;
309 frm_len_chk.s.minlen = 64;
310 frm_len_chk.s.maxlen = max_packet;
311 cvmx_write_csr(CVMX_PIP_FRM_LEN_CHKX(interface),
312 frm_len_chk.u64);
313 }
314 /*
315 * Set the hardware to truncate packets larger than
316 * the MTU. The jabber register must be set to a
317 * multiple of 8 bytes, so round up.
318 */
319 cvmx_write_csr(CVMX_GMXX_RXX_JABBER(index, interface),
320 (max_packet + 7) & ~7u);
321 }
322 return 0;
323 }
324
325 /**
326 * cvm_oct_common_set_multicast_list - set the multicast list
327 * @dev: Device to work on
328 */
329 static void cvm_oct_common_set_multicast_list(struct net_device *dev)
330 {
331 union cvmx_gmxx_prtx_cfg gmx_cfg;
332 struct octeon_ethernet *priv = netdev_priv(dev);
333 int interface = INTERFACE(priv->port);
334 int index = INDEX(priv->port);
335
336 if ((interface < 2)
337 && (cvmx_helper_interface_get_mode(interface) !=
338 CVMX_HELPER_INTERFACE_MODE_SPI)) {
339 union cvmx_gmxx_rxx_adr_ctl control;
340 control.u64 = 0;
341 control.s.bcst = 1; /* Allow broadcast MAC addresses */
342
343 if (!netdev_mc_empty(dev) || (dev->flags & IFF_ALLMULTI) ||
344 (dev->flags & IFF_PROMISC))
345 /* Force accept multicast packets */
346 control.s.mcst = 2;
347 else
348 /* Force reject multicast packets */
349 control.s.mcst = 1;
350
351 if (dev->flags & IFF_PROMISC)
352 /*
353 * Reject matches if promisc. Since CAM is
354 * shut off, should accept everything.
355 */
356 control.s.cam_mode = 0;
357 else
358 /* Filter packets based on the CAM */
359 control.s.cam_mode = 1;
360
361 gmx_cfg.u64 =
362 cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
363 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface),
364 gmx_cfg.u64 & ~1ull);
365
366 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CTL(index, interface),
367 control.u64);
368 if (dev->flags & IFF_PROMISC)
369 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM_EN
370 (index, interface), 0);
371 else
372 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM_EN
373 (index, interface), 1);
374
375 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface),
376 gmx_cfg.u64);
377 }
378 }
379
380 /**
381 * cvm_oct_common_set_mac_address - set the hardware MAC address for a device
382 * @dev: The device in question.
383 * @addr: Address structure to change it too.
384
385 * Returns Zero on success
386 */
387 static int cvm_oct_set_mac_filter(struct net_device *dev)
388 {
389 struct octeon_ethernet *priv = netdev_priv(dev);
390 union cvmx_gmxx_prtx_cfg gmx_cfg;
391 int interface = INTERFACE(priv->port);
392 int index = INDEX(priv->port);
393
394 if ((interface < 2)
395 && (cvmx_helper_interface_get_mode(interface) !=
396 CVMX_HELPER_INTERFACE_MODE_SPI)) {
397 int i;
398 uint8_t *ptr = dev->dev_addr;
399 uint64_t mac = 0;
400 for (i = 0; i < 6; i++)
401 mac = (mac << 8) | (uint64_t)ptr[i];
402
403 gmx_cfg.u64 =
404 cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
405 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface),
406 gmx_cfg.u64 & ~1ull);
407
408 cvmx_write_csr(CVMX_GMXX_SMACX(index, interface), mac);
409 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM0(index, interface),
410 ptr[0]);
411 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM1(index, interface),
412 ptr[1]);
413 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM2(index, interface),
414 ptr[2]);
415 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM3(index, interface),
416 ptr[3]);
417 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM4(index, interface),
418 ptr[4]);
419 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM5(index, interface),
420 ptr[5]);
421 cvm_oct_common_set_multicast_list(dev);
422 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface),
423 gmx_cfg.u64);
424 }
425 return 0;
426 }
427
428 static int cvm_oct_common_set_mac_address(struct net_device *dev, void *addr)
429 {
430 int r = eth_mac_addr(dev, addr);
431
432 if (r)
433 return r;
434 return cvm_oct_set_mac_filter(dev);
435 }
436
437 /**
438 * cvm_oct_common_init - per network device initialization
439 * @dev: Device to initialize
440 *
441 * Returns Zero on success
442 */
443 int cvm_oct_common_init(struct net_device *dev)
444 {
445 struct octeon_ethernet *priv = netdev_priv(dev);
446 const u8 *mac = NULL;
447
448 if (priv->of_node)
449 mac = of_get_mac_address(priv->of_node);
450
451 if (mac)
452 memcpy(dev->dev_addr, mac, ETH_ALEN);
453 else
454 eth_hw_addr_random(dev);
455
456 /*
457 * Force the interface to use the POW send if always_use_pow
458 * was specified or it is in the pow send list.
459 */
460 if ((pow_send_group != -1)
461 && (always_use_pow || strstr(pow_send_list, dev->name)))
462 priv->queue = -1;
463
464 if (priv->queue != -1) {
465 dev->features |= NETIF_F_SG;
466 if (USE_HW_TCPUDP_CHECKSUM)
467 dev->features |= NETIF_F_IP_CSUM;
468 }
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_phy_setup_device(dev);
475 cvm_oct_set_mac_filter(dev);
476 dev->netdev_ops->ndo_change_mtu(dev, dev->mtu);
477
478 /*
479 * Zero out stats for port so we won't mistakenly show
480 * counters from the bootloader.
481 */
482 memset(dev->netdev_ops->ndo_get_stats(dev), 0,
483 sizeof(struct net_device_stats));
484
485 return 0;
486 }
487
488 void cvm_oct_common_uninit(struct net_device *dev)
489 {
490 struct octeon_ethernet *priv = netdev_priv(dev);
491
492 if (priv->phydev)
493 phy_disconnect(priv->phydev);
494 }
495
496 static const struct net_device_ops cvm_oct_npi_netdev_ops = {
497 .ndo_init = cvm_oct_common_init,
498 .ndo_uninit = cvm_oct_common_uninit,
499 .ndo_start_xmit = cvm_oct_xmit,
500 .ndo_set_rx_mode = cvm_oct_common_set_multicast_list,
501 .ndo_set_mac_address = cvm_oct_common_set_mac_address,
502 .ndo_do_ioctl = cvm_oct_ioctl,
503 .ndo_change_mtu = cvm_oct_common_change_mtu,
504 .ndo_get_stats = cvm_oct_common_get_stats,
505 #ifdef CONFIG_NET_POLL_CONTROLLER
506 .ndo_poll_controller = cvm_oct_poll_controller,
507 #endif
508 };
509 static const struct net_device_ops cvm_oct_xaui_netdev_ops = {
510 .ndo_init = cvm_oct_xaui_init,
511 .ndo_uninit = cvm_oct_xaui_uninit,
512 .ndo_open = cvm_oct_xaui_open,
513 .ndo_stop = cvm_oct_xaui_stop,
514 .ndo_start_xmit = cvm_oct_xmit,
515 .ndo_set_rx_mode = cvm_oct_common_set_multicast_list,
516 .ndo_set_mac_address = cvm_oct_common_set_mac_address,
517 .ndo_do_ioctl = cvm_oct_ioctl,
518 .ndo_change_mtu = cvm_oct_common_change_mtu,
519 .ndo_get_stats = cvm_oct_common_get_stats,
520 #ifdef CONFIG_NET_POLL_CONTROLLER
521 .ndo_poll_controller = cvm_oct_poll_controller,
522 #endif
523 };
524 static const struct net_device_ops cvm_oct_sgmii_netdev_ops = {
525 .ndo_init = cvm_oct_sgmii_init,
526 .ndo_uninit = cvm_oct_sgmii_uninit,
527 .ndo_open = cvm_oct_sgmii_open,
528 .ndo_stop = cvm_oct_sgmii_stop,
529 .ndo_start_xmit = cvm_oct_xmit,
530 .ndo_set_rx_mode = cvm_oct_common_set_multicast_list,
531 .ndo_set_mac_address = cvm_oct_common_set_mac_address,
532 .ndo_do_ioctl = cvm_oct_ioctl,
533 .ndo_change_mtu = cvm_oct_common_change_mtu,
534 .ndo_get_stats = cvm_oct_common_get_stats,
535 #ifdef CONFIG_NET_POLL_CONTROLLER
536 .ndo_poll_controller = cvm_oct_poll_controller,
537 #endif
538 };
539 static const struct net_device_ops cvm_oct_spi_netdev_ops = {
540 .ndo_init = cvm_oct_spi_init,
541 .ndo_uninit = cvm_oct_spi_uninit,
542 .ndo_start_xmit = cvm_oct_xmit,
543 .ndo_set_rx_mode = cvm_oct_common_set_multicast_list,
544 .ndo_set_mac_address = cvm_oct_common_set_mac_address,
545 .ndo_do_ioctl = cvm_oct_ioctl,
546 .ndo_change_mtu = cvm_oct_common_change_mtu,
547 .ndo_get_stats = cvm_oct_common_get_stats,
548 #ifdef CONFIG_NET_POLL_CONTROLLER
549 .ndo_poll_controller = cvm_oct_poll_controller,
550 #endif
551 };
552 static const struct net_device_ops cvm_oct_rgmii_netdev_ops = {
553 .ndo_init = cvm_oct_rgmii_init,
554 .ndo_uninit = cvm_oct_rgmii_uninit,
555 .ndo_open = cvm_oct_rgmii_open,
556 .ndo_stop = cvm_oct_rgmii_stop,
557 .ndo_start_xmit = cvm_oct_xmit,
558 .ndo_set_rx_mode = cvm_oct_common_set_multicast_list,
559 .ndo_set_mac_address = cvm_oct_common_set_mac_address,
560 .ndo_do_ioctl = cvm_oct_ioctl,
561 .ndo_change_mtu = cvm_oct_common_change_mtu,
562 .ndo_get_stats = cvm_oct_common_get_stats,
563 #ifdef CONFIG_NET_POLL_CONTROLLER
564 .ndo_poll_controller = cvm_oct_poll_controller,
565 #endif
566 };
567 static const struct net_device_ops cvm_oct_pow_netdev_ops = {
568 .ndo_init = cvm_oct_common_init,
569 .ndo_start_xmit = cvm_oct_xmit_pow,
570 .ndo_set_rx_mode = cvm_oct_common_set_multicast_list,
571 .ndo_set_mac_address = cvm_oct_common_set_mac_address,
572 .ndo_do_ioctl = cvm_oct_ioctl,
573 .ndo_change_mtu = cvm_oct_common_change_mtu,
574 .ndo_get_stats = cvm_oct_common_get_stats,
575 #ifdef CONFIG_NET_POLL_CONTROLLER
576 .ndo_poll_controller = cvm_oct_poll_controller,
577 #endif
578 };
579
580 extern void octeon_mdiobus_force_mod_depencency(void);
581
582 static struct device_node *cvm_oct_of_get_child(
583 const struct device_node *parent, int reg_val)
584 {
585 struct device_node *node = NULL;
586 int size;
587 const __be32 *addr;
588
589 for (;;) {
590 node = of_get_next_child(parent, node);
591 if (!node)
592 break;
593 addr = of_get_property(node, "reg", &size);
594 if (addr && (be32_to_cpu(*addr) == reg_val))
595 break;
596 }
597 return node;
598 }
599
600 static struct device_node *cvm_oct_node_for_port(struct device_node *pip,
601 int interface, int port)
602 {
603 struct device_node *ni, *np;
604
605 ni = cvm_oct_of_get_child(pip, interface);
606 if (!ni)
607 return NULL;
608
609 np = cvm_oct_of_get_child(ni, port);
610 of_node_put(ni);
611
612 return np;
613 }
614
615 static int cvm_oct_probe(struct platform_device *pdev)
616 {
617 int num_interfaces;
618 int interface;
619 int fau = FAU_NUM_PACKET_BUFFERS_TO_FREE;
620 int qos;
621 struct device_node *pip;
622
623 octeon_mdiobus_force_mod_depencency();
624 pr_notice("cavium-ethernet %s\n", OCTEON_ETHERNET_VERSION);
625
626 pip = pdev->dev.of_node;
627 if (!pip) {
628 pr_err("Error: No 'pip' in /aliases\n");
629 return -EINVAL;
630 }
631
632 cvm_oct_poll_queue = create_singlethread_workqueue("octeon-ethernet");
633 if (cvm_oct_poll_queue == NULL) {
634 pr_err("octeon-ethernet: Cannot create workqueue");
635 return -ENOMEM;
636 }
637
638 cvm_oct_configure_common_hw();
639
640 cvmx_helper_initialize_packet_io_global();
641
642 /* Change the input group for all ports before input is enabled */
643 num_interfaces = cvmx_helper_get_number_of_interfaces();
644 for (interface = 0; interface < num_interfaces; interface++) {
645 int num_ports = cvmx_helper_ports_on_interface(interface);
646 int port;
647
648 for (port = cvmx_helper_get_ipd_port(interface, 0);
649 port < cvmx_helper_get_ipd_port(interface, num_ports);
650 port++) {
651 union cvmx_pip_prt_tagx pip_prt_tagx;
652 pip_prt_tagx.u64 =
653 cvmx_read_csr(CVMX_PIP_PRT_TAGX(port));
654 pip_prt_tagx.s.grp = pow_receive_group;
655 cvmx_write_csr(CVMX_PIP_PRT_TAGX(port),
656 pip_prt_tagx.u64);
657 }
658 }
659
660 cvmx_helper_ipd_and_packet_input_enable();
661
662 memset(cvm_oct_device, 0, sizeof(cvm_oct_device));
663
664 /*
665 * Initialize the FAU used for counting packet buffers that
666 * need to be freed.
667 */
668 cvmx_fau_atomic_write32(FAU_NUM_PACKET_BUFFERS_TO_FREE, 0);
669
670 /* Initialize the FAU used for counting tx SKBs that need to be freed */
671 cvmx_fau_atomic_write32(FAU_TOTAL_TX_TO_CLEAN, 0);
672
673 if ((pow_send_group != -1)) {
674 struct net_device *dev;
675 pr_info("\tConfiguring device for POW only access\n");
676 dev = alloc_etherdev(sizeof(struct octeon_ethernet));
677 if (dev) {
678 /* Initialize the device private structure. */
679 struct octeon_ethernet *priv = netdev_priv(dev);
680
681 dev->netdev_ops = &cvm_oct_pow_netdev_ops;
682 priv->imode = CVMX_HELPER_INTERFACE_MODE_DISABLED;
683 priv->port = CVMX_PIP_NUM_INPUT_PORTS;
684 priv->queue = -1;
685 strcpy(dev->name, "pow%d");
686 for (qos = 0; qos < 16; qos++)
687 skb_queue_head_init(&priv->tx_free_list[qos]);
688
689 if (register_netdev(dev) < 0) {
690 pr_err("Failed to register ethernet device for POW\n");
691 free_netdev(dev);
692 } else {
693 cvm_oct_device[CVMX_PIP_NUM_INPUT_PORTS] = dev;
694 pr_info("%s: POW send group %d, receive group %d\n",
695 dev->name, pow_send_group,
696 pow_receive_group);
697 }
698 } else {
699 pr_err("Failed to allocate ethernet device for POW\n");
700 }
701 }
702
703 num_interfaces = cvmx_helper_get_number_of_interfaces();
704 for (interface = 0; interface < num_interfaces; interface++) {
705 cvmx_helper_interface_mode_t imode =
706 cvmx_helper_interface_get_mode(interface);
707 int num_ports = cvmx_helper_ports_on_interface(interface);
708 int port;
709 int port_index;
710
711 for (port_index = 0,
712 port = cvmx_helper_get_ipd_port(interface, 0);
713 port < cvmx_helper_get_ipd_port(interface, num_ports);
714 port_index++, port++) {
715 struct octeon_ethernet *priv;
716 struct net_device *dev =
717 alloc_etherdev(sizeof(struct octeon_ethernet));
718 if (!dev) {
719 pr_err("Failed to allocate ethernet device for port %d\n", port);
720 continue;
721 }
722
723 /* Initialize the device private structure. */
724 priv = netdev_priv(dev);
725 priv->of_node = cvm_oct_node_for_port(pip, interface,
726 port_index);
727
728 INIT_DELAYED_WORK(&priv->port_periodic_work,
729 cvm_oct_periodic_worker);
730 priv->imode = imode;
731 priv->port = port;
732 priv->queue = cvmx_pko_get_base_queue(priv->port);
733 priv->fau = fau - cvmx_pko_get_num_queues(port) * 4;
734 for (qos = 0; qos < 16; qos++)
735 skb_queue_head_init(&priv->tx_free_list[qos]);
736 for (qos = 0; qos < cvmx_pko_get_num_queues(port);
737 qos++)
738 cvmx_fau_atomic_write32(priv->fau + qos * 4, 0);
739
740 switch (priv->imode) {
741
742 /* These types don't support ports to IPD/PKO */
743 case CVMX_HELPER_INTERFACE_MODE_DISABLED:
744 case CVMX_HELPER_INTERFACE_MODE_PCIE:
745 case CVMX_HELPER_INTERFACE_MODE_PICMG:
746 break;
747
748 case CVMX_HELPER_INTERFACE_MODE_NPI:
749 dev->netdev_ops = &cvm_oct_npi_netdev_ops;
750 strcpy(dev->name, "npi%d");
751 break;
752
753 case CVMX_HELPER_INTERFACE_MODE_XAUI:
754 dev->netdev_ops = &cvm_oct_xaui_netdev_ops;
755 strcpy(dev->name, "xaui%d");
756 break;
757
758 case CVMX_HELPER_INTERFACE_MODE_LOOP:
759 dev->netdev_ops = &cvm_oct_npi_netdev_ops;
760 strcpy(dev->name, "loop%d");
761 break;
762
763 case CVMX_HELPER_INTERFACE_MODE_SGMII:
764 dev->netdev_ops = &cvm_oct_sgmii_netdev_ops;
765 strcpy(dev->name, "eth%d");
766 break;
767
768 case CVMX_HELPER_INTERFACE_MODE_SPI:
769 dev->netdev_ops = &cvm_oct_spi_netdev_ops;
770 strcpy(dev->name, "spi%d");
771 break;
772
773 case CVMX_HELPER_INTERFACE_MODE_RGMII:
774 case CVMX_HELPER_INTERFACE_MODE_GMII:
775 dev->netdev_ops = &cvm_oct_rgmii_netdev_ops;
776 strcpy(dev->name, "eth%d");
777 break;
778 }
779
780 if (!dev->netdev_ops) {
781 free_netdev(dev);
782 } else if (register_netdev(dev) < 0) {
783 pr_err("Failed to register ethernet device "
784 "for interface %d, port %d\n",
785 interface, priv->port);
786 free_netdev(dev);
787 } else {
788 cvm_oct_device[priv->port] = dev;
789 fau -=
790 cvmx_pko_get_num_queues(priv->port) *
791 sizeof(uint32_t);
792 queue_delayed_work(cvm_oct_poll_queue,
793 &priv->port_periodic_work, HZ);
794 }
795 }
796 }
797
798 cvm_oct_tx_initialize();
799 cvm_oct_rx_initialize();
800
801 /*
802 * 150 uS: about 10 1500-byte packtes at 1GE.
803 */
804 cvm_oct_tx_poll_interval = 150 * (octeon_get_clock_rate() / 1000000);
805
806 queue_delayed_work(cvm_oct_poll_queue, &cvm_oct_rx_refill_work, HZ);
807
808 return 0;
809 }
810
811 static int cvm_oct_remove(struct platform_device *pdev)
812 {
813 int port;
814
815 /* Disable POW interrupt */
816 cvmx_write_csr(CVMX_POW_WQ_INT_THRX(pow_receive_group), 0);
817
818 cvmx_ipd_disable();
819
820 /* Free the interrupt handler */
821 free_irq(OCTEON_IRQ_WORKQ0 + pow_receive_group, cvm_oct_device);
822
823 atomic_inc_return(&cvm_oct_poll_queue_stopping);
824 cancel_delayed_work_sync(&cvm_oct_rx_refill_work);
825
826 cvm_oct_rx_shutdown();
827 cvm_oct_tx_shutdown();
828
829 cvmx_pko_disable();
830
831 /* Free the ethernet devices */
832 for (port = 0; port < TOTAL_NUMBER_OF_PORTS; port++) {
833 if (cvm_oct_device[port]) {
834 struct net_device *dev = cvm_oct_device[port];
835 struct octeon_ethernet *priv = netdev_priv(dev);
836 cancel_delayed_work_sync(&priv->port_periodic_work);
837
838 cvm_oct_tx_shutdown_dev(dev);
839 unregister_netdev(dev);
840 free_netdev(dev);
841 cvm_oct_device[port] = NULL;
842 }
843 }
844
845 destroy_workqueue(cvm_oct_poll_queue);
846
847 cvmx_pko_shutdown();
848
849 cvmx_ipd_free_ptr();
850
851 /* Free the HW pools */
852 cvm_oct_mem_empty_fpa(CVMX_FPA_PACKET_POOL, CVMX_FPA_PACKET_POOL_SIZE,
853 num_packet_buffers);
854 cvm_oct_mem_empty_fpa(CVMX_FPA_WQE_POOL, CVMX_FPA_WQE_POOL_SIZE,
855 num_packet_buffers);
856 if (CVMX_FPA_OUTPUT_BUFFER_POOL != CVMX_FPA_PACKET_POOL)
857 cvm_oct_mem_empty_fpa(CVMX_FPA_OUTPUT_BUFFER_POOL,
858 CVMX_FPA_OUTPUT_BUFFER_POOL_SIZE, 128);
859 return 0;
860 }
861
862 static struct of_device_id cvm_oct_match[] = {
863 {
864 .compatible = "cavium,octeon-3860-pip",
865 },
866 {},
867 };
868 MODULE_DEVICE_TABLE(of, cvm_oct_match);
869
870 static struct platform_driver cvm_oct_driver = {
871 .probe = cvm_oct_probe,
872 .remove = cvm_oct_remove,
873 .driver = {
874 .owner = THIS_MODULE,
875 .name = KBUILD_MODNAME,
876 .of_match_table = cvm_oct_match,
877 },
878 };
879
880 module_platform_driver(cvm_oct_driver);
881
882 MODULE_LICENSE("GPL");
883 MODULE_AUTHOR("Cavium Networks <support@caviumnetworks.com>");
884 MODULE_DESCRIPTION("Cavium Networks Octeon ethernet driver.");
Linux kernel - Deliverables
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