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Merge tag 'late-mvebu-rebased' of git://git.kernel.org/pub/scm/linux/kernel/git/arm...
[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/init.h>
30 #include <linux/module.h>
31 #include <linux/netdevice.h>
32 #include <linux/etherdevice.h>
33 #include <linux/phy.h>
34 #include <linux/slab.h>
35 #include <linux/interrupt.h>
36 #include <linux/of_net.h>
37
38 #include <net/dst.h>
39
40 #include <asm/octeon/octeon.h>
41
42 #include "ethernet-defines.h"
43 #include "octeon-ethernet.h"
44 #include "ethernet-mem.h"
45 #include "ethernet-rx.h"
46 #include "ethernet-tx.h"
47 #include "ethernet-mdio.h"
48 #include "ethernet-util.h"
49
50 #include <asm/octeon/cvmx-pip.h>
51 #include <asm/octeon/cvmx-pko.h>
52 #include <asm/octeon/cvmx-fau.h>
53 #include <asm/octeon/cvmx-ipd.h>
54 #include <asm/octeon/cvmx-helper.h>
55
56 #include <asm/octeon/cvmx-gmxx-defs.h>
57 #include <asm/octeon/cvmx-smix-defs.h>
58
59 #if defined(CONFIG_CAVIUM_OCTEON_NUM_PACKET_BUFFERS) \
60 && CONFIG_CAVIUM_OCTEON_NUM_PACKET_BUFFERS
61 int num_packet_buffers = CONFIG_CAVIUM_OCTEON_NUM_PACKET_BUFFERS;
62 #else
63 int num_packet_buffers = 1024;
64 #endif
65 module_param(num_packet_buffers, int, 0444);
66 MODULE_PARM_DESC(num_packet_buffers, "\n"
67 "\tNumber of packet buffers to allocate and store in the\n"
68 "\tFPA. By default, 1024 packet buffers are used unless\n"
69 "\tCONFIG_CAVIUM_OCTEON_NUM_PACKET_BUFFERS is defined.");
70
71 int pow_receive_group = 15;
72 module_param(pow_receive_group, int, 0444);
73 MODULE_PARM_DESC(pow_receive_group, "\n"
74 "\tPOW group to receive packets from. All ethernet hardware\n"
75 "\twill be configured to send incoming packets to this POW\n"
76 "\tgroup. Also any other software can submit packets to this\n"
77 "\tgroup for the kernel to process.");
78
79 int pow_send_group = -1;
80 module_param(pow_send_group, int, 0644);
81 MODULE_PARM_DESC(pow_send_group, "\n"
82 "\tPOW group to send packets to other software on. This\n"
83 "\tcontrols the creation of the virtual device pow0.\n"
84 "\talways_use_pow also depends on this value.");
85
86 int always_use_pow;
87 module_param(always_use_pow, int, 0444);
88 MODULE_PARM_DESC(always_use_pow, "\n"
89 "\tWhen set, always send to the pow group. This will cause\n"
90 "\tpackets sent to real ethernet devices to be sent to the\n"
91 "\tPOW group instead of the hardware. Unless some other\n"
92 "\tapplication changes the config, packets will still be\n"
93 "\treceived from the low level hardware. Use this option\n"
94 "\tto allow a CVMX app to intercept all packets from the\n"
95 "\tlinux kernel. You must specify pow_send_group along with\n"
96 "\tthis option.");
97
98 char pow_send_list[128] = "";
99 module_param_string(pow_send_list, pow_send_list, sizeof(pow_send_list), 0444);
100 MODULE_PARM_DESC(pow_send_list, "\n"
101 "\tComma separated list of ethernet devices that should use the\n"
102 "\tPOW for transmit instead of the actual ethernet hardware. This\n"
103 "\tis a per port version of always_use_pow. always_use_pow takes\n"
104 "\tprecedence over this list. For example, setting this to\n"
105 "\t\"eth2,spi3,spi7\" would cause these three devices to transmit\n"
106 "\tusing the pow_send_group.");
107
108 int max_rx_cpus = -1;
109 module_param(max_rx_cpus, int, 0444);
110 MODULE_PARM_DESC(max_rx_cpus, "\n"
111 "\t\tThe maximum number of CPUs to use for packet reception.\n"
112 "\t\tUse -1 to use all available CPUs.");
113
114 int rx_napi_weight = 32;
115 module_param(rx_napi_weight, int, 0444);
116 MODULE_PARM_DESC(rx_napi_weight, "The NAPI WEIGHT parameter.");
117
118 /**
119 * cvm_oct_poll_queue - Workqueue for polling operations.
120 */
121 struct workqueue_struct *cvm_oct_poll_queue;
122
123 /**
124 * cvm_oct_poll_queue_stopping - flag to indicate polling should stop.
125 *
126 * Set to one right before cvm_oct_poll_queue is destroyed.
127 */
128 atomic_t cvm_oct_poll_queue_stopping = ATOMIC_INIT(0);
129
130 /**
131 * Array of every ethernet device owned by this driver indexed by
132 * the ipd input port number.
133 */
134 struct net_device *cvm_oct_device[TOTAL_NUMBER_OF_PORTS];
135
136 u64 cvm_oct_tx_poll_interval;
137
138 static void cvm_oct_rx_refill_worker(struct work_struct *work);
139 static DECLARE_DELAYED_WORK(cvm_oct_rx_refill_work, cvm_oct_rx_refill_worker);
140
141 static void cvm_oct_rx_refill_worker(struct work_struct *work)
142 {
143 /*
144 * FPA 0 may have been drained, try to refill it if we need
145 * more than num_packet_buffers / 2, otherwise normal receive
146 * processing will refill it. If it were drained, no packets
147 * could be received so cvm_oct_napi_poll would never be
148 * invoked to do the refill.
149 */
150 cvm_oct_rx_refill_pool(num_packet_buffers / 2);
151
152 if (!atomic_read(&cvm_oct_poll_queue_stopping))
153 queue_delayed_work(cvm_oct_poll_queue,
154 &cvm_oct_rx_refill_work, HZ);
155 }
156
157 static void cvm_oct_periodic_worker(struct work_struct *work)
158 {
159 struct octeon_ethernet *priv = container_of(work,
160 struct octeon_ethernet,
161 port_periodic_work.work);
162
163 if (priv->poll)
164 priv->poll(cvm_oct_device[priv->port]);
165
166 cvm_oct_device[priv->port]->netdev_ops->ndo_get_stats(cvm_oct_device[priv->port]);
167
168 if (!atomic_read(&cvm_oct_poll_queue_stopping))
169 queue_delayed_work(cvm_oct_poll_queue, &priv->port_periodic_work, HZ);
170 }
171
172 static void cvm_oct_configure_common_hw(void)
173 {
174 /* Setup the FPA */
175 cvmx_fpa_enable();
176 cvm_oct_mem_fill_fpa(CVMX_FPA_PACKET_POOL, CVMX_FPA_PACKET_POOL_SIZE,
177 num_packet_buffers);
178 cvm_oct_mem_fill_fpa(CVMX_FPA_WQE_POOL, CVMX_FPA_WQE_POOL_SIZE,
179 num_packet_buffers);
180 if (CVMX_FPA_OUTPUT_BUFFER_POOL != CVMX_FPA_PACKET_POOL)
181 cvm_oct_mem_fill_fpa(CVMX_FPA_OUTPUT_BUFFER_POOL,
182 CVMX_FPA_OUTPUT_BUFFER_POOL_SIZE, 128);
183
184 if (USE_RED)
185 cvmx_helper_setup_red(num_packet_buffers / 4,
186 num_packet_buffers / 8);
187
188 }
189
190 /**
191 * cvm_oct_free_work- Free a work queue entry
192 *
193 * @work_queue_entry: Work queue entry to free
194 *
195 * Returns Zero on success, Negative on failure.
196 */
197 int cvm_oct_free_work(void *work_queue_entry)
198 {
199 cvmx_wqe_t *work = work_queue_entry;
200
201 int segments = work->word2.s.bufs;
202 union cvmx_buf_ptr segment_ptr = work->packet_ptr;
203
204 while (segments--) {
205 union cvmx_buf_ptr next_ptr = *(union cvmx_buf_ptr *)
206 cvmx_phys_to_ptr(segment_ptr.s.addr - 8);
207 if (unlikely(!segment_ptr.s.i))
208 cvmx_fpa_free(cvm_oct_get_buffer_ptr(segment_ptr),
209 segment_ptr.s.pool,
210 DONT_WRITEBACK(CVMX_FPA_PACKET_POOL_SIZE /
211 128));
212 segment_ptr = next_ptr;
213 }
214 cvmx_fpa_free(work, CVMX_FPA_WQE_POOL, DONT_WRITEBACK(1));
215
216 return 0;
217 }
218 EXPORT_SYMBOL(cvm_oct_free_work);
219
220 /**
221 * cvm_oct_common_get_stats - get the low level ethernet statistics
222 * @dev: Device to get the statistics from
223 *
224 * Returns Pointer to the statistics
225 */
226 static struct net_device_stats *cvm_oct_common_get_stats(struct net_device *dev)
227 {
228 cvmx_pip_port_status_t rx_status;
229 cvmx_pko_port_status_t tx_status;
230 struct octeon_ethernet *priv = netdev_priv(dev);
231
232 if (priv->port < CVMX_PIP_NUM_INPUT_PORTS) {
233 if (octeon_is_simulation()) {
234 /* The simulator doesn't support statistics */
235 memset(&rx_status, 0, sizeof(rx_status));
236 memset(&tx_status, 0, sizeof(tx_status));
237 } else {
238 cvmx_pip_get_port_status(priv->port, 1, &rx_status);
239 cvmx_pko_get_port_status(priv->port, 1, &tx_status);
240 }
241
242 priv->stats.rx_packets += rx_status.inb_packets;
243 priv->stats.tx_packets += tx_status.packets;
244 priv->stats.rx_bytes += rx_status.inb_octets;
245 priv->stats.tx_bytes += tx_status.octets;
246 priv->stats.multicast += rx_status.multicast_packets;
247 priv->stats.rx_crc_errors += rx_status.inb_errors;
248 priv->stats.rx_frame_errors += rx_status.fcs_align_err_packets;
249
250 /*
251 * The drop counter must be incremented atomically
252 * since the RX tasklet also increments it.
253 */
254 #ifdef CONFIG_64BIT
255 atomic64_add(rx_status.dropped_packets,
256 (atomic64_t *)&priv->stats.rx_dropped);
257 #else
258 atomic_add(rx_status.dropped_packets,
259 (atomic_t *)&priv->stats.rx_dropped);
260 #endif
261 }
262
263 return &priv->stats;
264 }
265
266 /**
267 * cvm_oct_common_change_mtu - change the link MTU
268 * @dev: Device to change
269 * @new_mtu: The new MTU
270 *
271 * Returns Zero on success
272 */
273 static int cvm_oct_common_change_mtu(struct net_device *dev, int new_mtu)
274 {
275 struct octeon_ethernet *priv = netdev_priv(dev);
276 int interface = INTERFACE(priv->port);
277 int index = INDEX(priv->port);
278 #if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE)
279 int vlan_bytes = 4;
280 #else
281 int vlan_bytes = 0;
282 #endif
283
284 /*
285 * Limit the MTU to make sure the ethernet packets are between
286 * 64 bytes and 65535 bytes.
287 */
288 if ((new_mtu + 14 + 4 + vlan_bytes < 64)
289 || (new_mtu + 14 + 4 + vlan_bytes > 65392)) {
290 pr_err("MTU must be between %d and %d.\n",
291 64 - 14 - 4 - vlan_bytes, 65392 - 14 - 4 - vlan_bytes);
292 return -EINVAL;
293 }
294 dev->mtu = new_mtu;
295
296 if ((interface < 2)
297 && (cvmx_helper_interface_get_mode(interface) !=
298 CVMX_HELPER_INTERFACE_MODE_SPI)) {
299 /* Add ethernet header and FCS, and VLAN if configured. */
300 int max_packet = new_mtu + 14 + 4 + vlan_bytes;
301
302 if (OCTEON_IS_MODEL(OCTEON_CN3XXX)
303 || OCTEON_IS_MODEL(OCTEON_CN58XX)) {
304 /* Signal errors on packets larger than the MTU */
305 cvmx_write_csr(CVMX_GMXX_RXX_FRM_MAX(index, interface),
306 max_packet);
307 } else {
308 /*
309 * Set the hardware to truncate packets larger
310 * than the MTU and smaller the 64 bytes.
311 */
312 union cvmx_pip_frm_len_chkx frm_len_chk;
313 frm_len_chk.u64 = 0;
314 frm_len_chk.s.minlen = 64;
315 frm_len_chk.s.maxlen = max_packet;
316 cvmx_write_csr(CVMX_PIP_FRM_LEN_CHKX(interface),
317 frm_len_chk.u64);
318 }
319 /*
320 * Set the hardware to truncate packets larger than
321 * the MTU. The jabber register must be set to a
322 * multiple of 8 bytes, so round up.
323 */
324 cvmx_write_csr(CVMX_GMXX_RXX_JABBER(index, interface),
325 (max_packet + 7) & ~7u);
326 }
327 return 0;
328 }
329
330 /**
331 * cvm_oct_common_set_multicast_list - set the multicast list
332 * @dev: Device to work on
333 */
334 static void cvm_oct_common_set_multicast_list(struct net_device *dev)
335 {
336 union cvmx_gmxx_prtx_cfg gmx_cfg;
337 struct octeon_ethernet *priv = netdev_priv(dev);
338 int interface = INTERFACE(priv->port);
339 int index = INDEX(priv->port);
340
341 if ((interface < 2)
342 && (cvmx_helper_interface_get_mode(interface) !=
343 CVMX_HELPER_INTERFACE_MODE_SPI)) {
344 union cvmx_gmxx_rxx_adr_ctl control;
345 control.u64 = 0;
346 control.s.bcst = 1; /* Allow broadcast MAC addresses */
347
348 if (!netdev_mc_empty(dev) || (dev->flags & IFF_ALLMULTI) ||
349 (dev->flags & IFF_PROMISC))
350 /* Force accept multicast packets */
351 control.s.mcst = 2;
352 else
353 /* Force reject multicast packets */
354 control.s.mcst = 1;
355
356 if (dev->flags & IFF_PROMISC)
357 /*
358 * Reject matches if promisc. Since CAM is
359 * shut off, should accept everything.
360 */
361 control.s.cam_mode = 0;
362 else
363 /* Filter packets based on the CAM */
364 control.s.cam_mode = 1;
365
366 gmx_cfg.u64 =
367 cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
368 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface),
369 gmx_cfg.u64 & ~1ull);
370
371 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CTL(index, interface),
372 control.u64);
373 if (dev->flags & IFF_PROMISC)
374 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM_EN
375 (index, interface), 0);
376 else
377 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM_EN
378 (index, interface), 1);
379
380 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface),
381 gmx_cfg.u64);
382 }
383 }
384
385 /**
386 * cvm_oct_common_set_mac_address - set the hardware MAC address for a device
387 * @dev: The device in question.
388 * @addr: Address structure to change it too.
389
390 * Returns Zero on success
391 */
392 static int cvm_oct_set_mac_filter(struct net_device *dev)
393 {
394 struct octeon_ethernet *priv = netdev_priv(dev);
395 union cvmx_gmxx_prtx_cfg gmx_cfg;
396 int interface = INTERFACE(priv->port);
397 int index = INDEX(priv->port);
398
399 if ((interface < 2)
400 && (cvmx_helper_interface_get_mode(interface) !=
401 CVMX_HELPER_INTERFACE_MODE_SPI)) {
402 int i;
403 uint8_t *ptr = dev->dev_addr;
404 uint64_t mac = 0;
405 for (i = 0; i < 6; i++)
406 mac = (mac << 8) | (uint64_t)ptr[i];
407
408 gmx_cfg.u64 =
409 cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
410 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface),
411 gmx_cfg.u64 & ~1ull);
412
413 cvmx_write_csr(CVMX_GMXX_SMACX(index, interface), mac);
414 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM0(index, interface),
415 ptr[0]);
416 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM1(index, interface),
417 ptr[1]);
418 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM2(index, interface),
419 ptr[2]);
420 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM3(index, interface),
421 ptr[3]);
422 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM4(index, interface),
423 ptr[4]);
424 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM5(index, interface),
425 ptr[5]);
426 cvm_oct_common_set_multicast_list(dev);
427 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface),
428 gmx_cfg.u64);
429 }
430 return 0;
431 }
432
433 static int cvm_oct_common_set_mac_address(struct net_device *dev, void *addr)
434 {
435 int r = eth_mac_addr(dev, addr);
436
437 if (r)
438 return r;
439 return cvm_oct_set_mac_filter(dev);
440 }
441
442 /**
443 * cvm_oct_common_init - per network device initialization
444 * @dev: Device to initialize
445 *
446 * Returns Zero on success
447 */
448 int cvm_oct_common_init(struct net_device *dev)
449 {
450 struct octeon_ethernet *priv = netdev_priv(dev);
451 const u8 *mac = NULL;
452
453 if (priv->of_node)
454 mac = of_get_mac_address(priv->of_node);
455
456 if (mac && is_valid_ether_addr(mac))
457 memcpy(dev->dev_addr, mac, ETH_ALEN);
458 else
459 eth_hw_addr_random(dev);
460
461 /*
462 * Force the interface to use the POW send if always_use_pow
463 * was specified or it is in the pow send list.
464 */
465 if ((pow_send_group != -1)
466 && (always_use_pow || strstr(pow_send_list, dev->name)))
467 priv->queue = -1;
468
469 if (priv->queue != -1) {
470 dev->features |= NETIF_F_SG;
471 if (USE_HW_TCPUDP_CHECKSUM)
472 dev->features |= NETIF_F_IP_CSUM;
473 }
474
475 /* We do our own locking, Linux doesn't need to */
476 dev->features |= NETIF_F_LLTX;
477 SET_ETHTOOL_OPS(dev, &cvm_oct_ethtool_ops);
478
479 cvm_oct_phy_setup_device(dev);
480 cvm_oct_set_mac_filter(dev);
481 dev->netdev_ops->ndo_change_mtu(dev, dev->mtu);
482
483 /*
484 * Zero out stats for port so we won't mistakenly show
485 * counters from the bootloader.
486 */
487 memset(dev->netdev_ops->ndo_get_stats(dev), 0,
488 sizeof(struct net_device_stats));
489
490 return 0;
491 }
492
493 void cvm_oct_common_uninit(struct net_device *dev)
494 {
495 struct octeon_ethernet *priv = netdev_priv(dev);
496
497 if (priv->phydev)
498 phy_disconnect(priv->phydev);
499 }
500
501 static const struct net_device_ops cvm_oct_npi_netdev_ops = {
502 .ndo_init = cvm_oct_common_init,
503 .ndo_uninit = cvm_oct_common_uninit,
504 .ndo_start_xmit = cvm_oct_xmit,
505 .ndo_set_rx_mode = cvm_oct_common_set_multicast_list,
506 .ndo_set_mac_address = cvm_oct_common_set_mac_address,
507 .ndo_do_ioctl = cvm_oct_ioctl,
508 .ndo_change_mtu = cvm_oct_common_change_mtu,
509 .ndo_get_stats = cvm_oct_common_get_stats,
510 #ifdef CONFIG_NET_POLL_CONTROLLER
511 .ndo_poll_controller = cvm_oct_poll_controller,
512 #endif
513 };
514 static const struct net_device_ops cvm_oct_xaui_netdev_ops = {
515 .ndo_init = cvm_oct_xaui_init,
516 .ndo_uninit = cvm_oct_xaui_uninit,
517 .ndo_open = cvm_oct_xaui_open,
518 .ndo_stop = cvm_oct_xaui_stop,
519 .ndo_start_xmit = cvm_oct_xmit,
520 .ndo_set_rx_mode = cvm_oct_common_set_multicast_list,
521 .ndo_set_mac_address = cvm_oct_common_set_mac_address,
522 .ndo_do_ioctl = cvm_oct_ioctl,
523 .ndo_change_mtu = cvm_oct_common_change_mtu,
524 .ndo_get_stats = cvm_oct_common_get_stats,
525 #ifdef CONFIG_NET_POLL_CONTROLLER
526 .ndo_poll_controller = cvm_oct_poll_controller,
527 #endif
528 };
529 static const struct net_device_ops cvm_oct_sgmii_netdev_ops = {
530 .ndo_init = cvm_oct_sgmii_init,
531 .ndo_uninit = cvm_oct_sgmii_uninit,
532 .ndo_open = cvm_oct_sgmii_open,
533 .ndo_stop = cvm_oct_sgmii_stop,
534 .ndo_start_xmit = cvm_oct_xmit,
535 .ndo_set_rx_mode = cvm_oct_common_set_multicast_list,
536 .ndo_set_mac_address = cvm_oct_common_set_mac_address,
537 .ndo_do_ioctl = cvm_oct_ioctl,
538 .ndo_change_mtu = cvm_oct_common_change_mtu,
539 .ndo_get_stats = cvm_oct_common_get_stats,
540 #ifdef CONFIG_NET_POLL_CONTROLLER
541 .ndo_poll_controller = cvm_oct_poll_controller,
542 #endif
543 };
544 static const struct net_device_ops cvm_oct_spi_netdev_ops = {
545 .ndo_init = cvm_oct_spi_init,
546 .ndo_uninit = cvm_oct_spi_uninit,
547 .ndo_start_xmit = cvm_oct_xmit,
548 .ndo_set_rx_mode = cvm_oct_common_set_multicast_list,
549 .ndo_set_mac_address = cvm_oct_common_set_mac_address,
550 .ndo_do_ioctl = cvm_oct_ioctl,
551 .ndo_change_mtu = cvm_oct_common_change_mtu,
552 .ndo_get_stats = cvm_oct_common_get_stats,
553 #ifdef CONFIG_NET_POLL_CONTROLLER
554 .ndo_poll_controller = cvm_oct_poll_controller,
555 #endif
556 };
557 static const struct net_device_ops cvm_oct_rgmii_netdev_ops = {
558 .ndo_init = cvm_oct_rgmii_init,
559 .ndo_uninit = cvm_oct_rgmii_uninit,
560 .ndo_open = cvm_oct_rgmii_open,
561 .ndo_stop = cvm_oct_rgmii_stop,
562 .ndo_start_xmit = cvm_oct_xmit,
563 .ndo_set_rx_mode = cvm_oct_common_set_multicast_list,
564 .ndo_set_mac_address = cvm_oct_common_set_mac_address,
565 .ndo_do_ioctl = cvm_oct_ioctl,
566 .ndo_change_mtu = cvm_oct_common_change_mtu,
567 .ndo_get_stats = cvm_oct_common_get_stats,
568 #ifdef CONFIG_NET_POLL_CONTROLLER
569 .ndo_poll_controller = cvm_oct_poll_controller,
570 #endif
571 };
572 static const struct net_device_ops cvm_oct_pow_netdev_ops = {
573 .ndo_init = cvm_oct_common_init,
574 .ndo_start_xmit = cvm_oct_xmit_pow,
575 .ndo_set_rx_mode = cvm_oct_common_set_multicast_list,
576 .ndo_set_mac_address = cvm_oct_common_set_mac_address,
577 .ndo_do_ioctl = cvm_oct_ioctl,
578 .ndo_change_mtu = cvm_oct_common_change_mtu,
579 .ndo_get_stats = cvm_oct_common_get_stats,
580 #ifdef CONFIG_NET_POLL_CONTROLLER
581 .ndo_poll_controller = cvm_oct_poll_controller,
582 #endif
583 };
584
585 extern void octeon_mdiobus_force_mod_depencency(void);
586
587 static struct device_node *cvm_oct_of_get_child(const struct device_node *parent,
588 int reg_val)
589 {
590 struct device_node *node = NULL;
591 int size;
592 const __be32 *addr;
593
594 for (;;) {
595 node = of_get_next_child(parent, node);
596 if (!node)
597 break;
598 addr = of_get_property(node, "reg", &size);
599 if (addr && (be32_to_cpu(*addr) == reg_val))
600 break;
601 }
602 return node;
603 }
604
605 static struct device_node *cvm_oct_node_for_port(struct device_node *pip,
606 int interface, int port)
607 {
608 struct device_node *ni, *np;
609
610 ni = cvm_oct_of_get_child(pip, interface);
611 if (!ni)
612 return NULL;
613
614 np = cvm_oct_of_get_child(ni, port);
615 of_node_put(ni);
616
617 return np;
618 }
619
620 static int cvm_oct_probe(struct platform_device *pdev)
621 {
622 int num_interfaces;
623 int interface;
624 int fau = FAU_NUM_PACKET_BUFFERS_TO_FREE;
625 int qos;
626 struct device_node *pip;
627
628 octeon_mdiobus_force_mod_depencency();
629 pr_notice("cavium-ethernet %s\n", OCTEON_ETHERNET_VERSION);
630
631 pip = pdev->dev.of_node;
632 if (!pip) {
633 pr_err("Error: No 'pip' in /aliases\n");
634 return -EINVAL;
635 }
636
637 cvm_oct_poll_queue = create_singlethread_workqueue("octeon-ethernet");
638 if (cvm_oct_poll_queue == NULL) {
639 pr_err("octeon-ethernet: Cannot create workqueue");
640 return -ENOMEM;
641 }
642
643 cvm_oct_configure_common_hw();
644
645 cvmx_helper_initialize_packet_io_global();
646
647 /* Change the input group for all ports before input is enabled */
648 num_interfaces = cvmx_helper_get_number_of_interfaces();
649 for (interface = 0; interface < num_interfaces; interface++) {
650 int num_ports = cvmx_helper_ports_on_interface(interface);
651 int port;
652
653 for (port = cvmx_helper_get_ipd_port(interface, 0);
654 port < cvmx_helper_get_ipd_port(interface, num_ports);
655 port++) {
656 union cvmx_pip_prt_tagx pip_prt_tagx;
657 pip_prt_tagx.u64 =
658 cvmx_read_csr(CVMX_PIP_PRT_TAGX(port));
659 pip_prt_tagx.s.grp = pow_receive_group;
660 cvmx_write_csr(CVMX_PIP_PRT_TAGX(port),
661 pip_prt_tagx.u64);
662 }
663 }
664
665 cvmx_helper_ipd_and_packet_input_enable();
666
667 memset(cvm_oct_device, 0, sizeof(cvm_oct_device));
668
669 /*
670 * Initialize the FAU used for counting packet buffers that
671 * need to be freed.
672 */
673 cvmx_fau_atomic_write32(FAU_NUM_PACKET_BUFFERS_TO_FREE, 0);
674
675 /* Initialize the FAU used for counting tx SKBs that need to be freed */
676 cvmx_fau_atomic_write32(FAU_TOTAL_TX_TO_CLEAN, 0);
677
678 if ((pow_send_group != -1)) {
679 struct net_device *dev;
680 pr_info("\tConfiguring device for POW only access\n");
681 dev = alloc_etherdev(sizeof(struct octeon_ethernet));
682 if (dev) {
683 /* Initialize the device private structure. */
684 struct octeon_ethernet *priv = netdev_priv(dev);
685
686 dev->netdev_ops = &cvm_oct_pow_netdev_ops;
687 priv->imode = CVMX_HELPER_INTERFACE_MODE_DISABLED;
688 priv->port = CVMX_PIP_NUM_INPUT_PORTS;
689 priv->queue = -1;
690 strcpy(dev->name, "pow%d");
691 for (qos = 0; qos < 16; qos++)
692 skb_queue_head_init(&priv->tx_free_list[qos]);
693
694 if (register_netdev(dev) < 0) {
695 pr_err("Failed to register ethernet device for POW\n");
696 free_netdev(dev);
697 } else {
698 cvm_oct_device[CVMX_PIP_NUM_INPUT_PORTS] = dev;
699 pr_info("%s: POW send group %d, receive group %d\n",
700 dev->name, pow_send_group,
701 pow_receive_group);
702 }
703 } else {
704 pr_err("Failed to allocate ethernet device for POW\n");
705 }
706 }
707
708 num_interfaces = cvmx_helper_get_number_of_interfaces();
709 for (interface = 0; interface < num_interfaces; interface++) {
710 cvmx_helper_interface_mode_t imode =
711 cvmx_helper_interface_get_mode(interface);
712 int num_ports = cvmx_helper_ports_on_interface(interface);
713 int port;
714 int port_index;
715
716 for (port_index = 0, 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", port);
724 continue;
725 }
726
727 /* Initialize the device private structure. */
728 priv = netdev_priv(dev);
729 priv->of_node = cvm_oct_node_for_port(pip, interface, port_index);
730
731 INIT_DELAYED_WORK(&priv->port_periodic_work,
732 cvm_oct_periodic_worker);
733 priv->imode = imode;
734 priv->port = port;
735 priv->queue = cvmx_pko_get_base_queue(priv->port);
736 priv->fau = fau - cvmx_pko_get_num_queues(port) * 4;
737 for (qos = 0; qos < 16; qos++)
738 skb_queue_head_init(&priv->tx_free_list[qos]);
739 for (qos = 0; qos < cvmx_pko_get_num_queues(port);
740 qos++)
741 cvmx_fau_atomic_write32(priv->fau + qos * 4, 0);
742
743 switch (priv->imode) {
744
745 /* These types don't support ports to IPD/PKO */
746 case CVMX_HELPER_INTERFACE_MODE_DISABLED:
747 case CVMX_HELPER_INTERFACE_MODE_PCIE:
748 case CVMX_HELPER_INTERFACE_MODE_PICMG:
749 break;
750
751 case CVMX_HELPER_INTERFACE_MODE_NPI:
752 dev->netdev_ops = &cvm_oct_npi_netdev_ops;
753 strcpy(dev->name, "npi%d");
754 break;
755
756 case CVMX_HELPER_INTERFACE_MODE_XAUI:
757 dev->netdev_ops = &cvm_oct_xaui_netdev_ops;
758 strcpy(dev->name, "xaui%d");
759 break;
760
761 case CVMX_HELPER_INTERFACE_MODE_LOOP:
762 dev->netdev_ops = &cvm_oct_npi_netdev_ops;
763 strcpy(dev->name, "loop%d");
764 break;
765
766 case CVMX_HELPER_INTERFACE_MODE_SGMII:
767 dev->netdev_ops = &cvm_oct_sgmii_netdev_ops;
768 strcpy(dev->name, "eth%d");
769 break;
770
771 case CVMX_HELPER_INTERFACE_MODE_SPI:
772 dev->netdev_ops = &cvm_oct_spi_netdev_ops;
773 strcpy(dev->name, "spi%d");
774 break;
775
776 case CVMX_HELPER_INTERFACE_MODE_RGMII:
777 case CVMX_HELPER_INTERFACE_MODE_GMII:
778 dev->netdev_ops = &cvm_oct_rgmii_netdev_ops;
779 strcpy(dev->name, "eth%d");
780 break;
781 }
782
783 if (!dev->netdev_ops) {
784 free_netdev(dev);
785 } else if (register_netdev(dev) < 0) {
786 pr_err("Failed to register ethernet device "
787 "for interface %d, port %d\n",
788 interface, priv->port);
789 free_netdev(dev);
790 } else {
791 cvm_oct_device[priv->port] = dev;
792 fau -=
793 cvmx_pko_get_num_queues(priv->port) *
794 sizeof(uint32_t);
795 queue_delayed_work(cvm_oct_poll_queue,
796 &priv->port_periodic_work, HZ);
797 }
798 }
799 }
800
801 cvm_oct_tx_initialize();
802 cvm_oct_rx_initialize();
803
804 /*
805 * 150 uS: about 10 1500-byte packtes at 1GE.
806 */
807 cvm_oct_tx_poll_interval = 150 * (octeon_get_clock_rate() / 1000000);
808
809 queue_delayed_work(cvm_oct_poll_queue, &cvm_oct_rx_refill_work, HZ);
810
811 return 0;
812 }
813
814 static int cvm_oct_remove(struct platform_device *pdev)
815 {
816 int port;
817
818 /* Disable POW interrupt */
819 cvmx_write_csr(CVMX_POW_WQ_INT_THRX(pow_receive_group), 0);
820
821 cvmx_ipd_disable();
822
823 /* Free the interrupt handler */
824 free_irq(OCTEON_IRQ_WORKQ0 + pow_receive_group, cvm_oct_device);
825
826 atomic_inc_return(&cvm_oct_poll_queue_stopping);
827 cancel_delayed_work_sync(&cvm_oct_rx_refill_work);
828
829 cvm_oct_rx_shutdown();
830 cvm_oct_tx_shutdown();
831
832 cvmx_pko_disable();
833
834 /* Free the ethernet devices */
835 for (port = 0; port < TOTAL_NUMBER_OF_PORTS; port++) {
836 if (cvm_oct_device[port]) {
837 struct net_device *dev = cvm_oct_device[port];
838 struct octeon_ethernet *priv = netdev_priv(dev);
839 cancel_delayed_work_sync(&priv->port_periodic_work);
840
841 cvm_oct_tx_shutdown_dev(dev);
842 unregister_netdev(dev);
843 free_netdev(dev);
844 cvm_oct_device[port] = NULL;
845 }
846 }
847
848 destroy_workqueue(cvm_oct_poll_queue);
849
850 cvmx_pko_shutdown();
851
852 cvmx_ipd_free_ptr();
853
854 /* Free the HW pools */
855 cvm_oct_mem_empty_fpa(CVMX_FPA_PACKET_POOL, CVMX_FPA_PACKET_POOL_SIZE,
856 num_packet_buffers);
857 cvm_oct_mem_empty_fpa(CVMX_FPA_WQE_POOL, CVMX_FPA_WQE_POOL_SIZE,
858 num_packet_buffers);
859 if (CVMX_FPA_OUTPUT_BUFFER_POOL != CVMX_FPA_PACKET_POOL)
860 cvm_oct_mem_empty_fpa(CVMX_FPA_OUTPUT_BUFFER_POOL,
861 CVMX_FPA_OUTPUT_BUFFER_POOL_SIZE, 128);
862 return 0;
863 }
864
865 static struct of_device_id cvm_oct_match[] = {
866 {
867 .compatible = "cavium,octeon-3860-pip",
868 },
869 {},
870 };
871 MODULE_DEVICE_TABLE(of, cvm_oct_match);
872
873 static struct platform_driver cvm_oct_driver = {
874 .probe = cvm_oct_probe,
875 .remove = cvm_oct_remove,
876 .driver = {
877 .owner = THIS_MODULE,
878 .name = KBUILD_MODNAME,
879 .of_match_table = cvm_oct_match,
880 },
881 };
882
883 module_platform_driver(cvm_oct_driver);
884
885 MODULE_LICENSE("GPL");
886 MODULE_AUTHOR("Cavium Networks <support@caviumnetworks.com>");
887 MODULE_DESCRIPTION("Cavium Networks Octeon ethernet driver.");
Linux kernel - Deliverables
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