blob: 8ad476a19d95c4c4c5e35ca066ef1ca354617a4e [file] [log] [blame]
Ben Hutchings8ceee662008-04-27 12:55:59 +01001/****************************************************************************
2 * Driver for Solarflare Solarstorm network controllers and boards
3 * Copyright 2005-2006 Fen Systems Ltd.
Ben Hutchings906bb262009-11-29 15:16:19 +00004 * Copyright 2005-2009 Solarflare Communications Inc.
Ben Hutchings8ceee662008-04-27 12:55:59 +01005 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 as published
8 * by the Free Software Foundation, incorporated herein by reference.
9 */
10
11#include <linux/module.h>
12#include <linux/pci.h>
13#include <linux/netdevice.h>
14#include <linux/etherdevice.h>
15#include <linux/delay.h>
16#include <linux/notifier.h>
17#include <linux/ip.h>
18#include <linux/tcp.h>
19#include <linux/in.h>
20#include <linux/crc32.h>
21#include <linux/ethtool.h>
Ben Hutchingsaa6ef272008-07-18 19:03:10 +010022#include <linux/topology.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090023#include <linux/gfp.h>
Ben Hutchings8ceee662008-04-27 12:55:59 +010024#include "net_driver.h"
Ben Hutchings8ceee662008-04-27 12:55:59 +010025#include "efx.h"
26#include "mdio_10g.h"
Ben Hutchings744093c2009-11-29 15:12:08 +000027#include "nic.h"
Ben Hutchings8ceee662008-04-27 12:55:59 +010028
Ben Hutchings8880f4e2009-11-29 15:15:41 +000029#include "mcdi.h"
Steve Hodgsonfd371e32010-06-01 11:17:51 +000030#include "workarounds.h"
Ben Hutchings8880f4e2009-11-29 15:15:41 +000031
Ben Hutchingsc4593022009-11-23 16:08:17 +000032/**************************************************************************
33 *
34 * Type name strings
35 *
36 **************************************************************************
37 */
38
39/* Loopback mode names (see LOOPBACK_MODE()) */
40const unsigned int efx_loopback_mode_max = LOOPBACK_MAX;
41const char *efx_loopback_mode_names[] = {
42 [LOOPBACK_NONE] = "NONE",
Ben Hutchingse58f69f2009-11-29 15:08:41 +000043 [LOOPBACK_DATA] = "DATAPATH",
Ben Hutchingsc4593022009-11-23 16:08:17 +000044 [LOOPBACK_GMAC] = "GMAC",
45 [LOOPBACK_XGMII] = "XGMII",
46 [LOOPBACK_XGXS] = "XGXS",
47 [LOOPBACK_XAUI] = "XAUI",
Ben Hutchingse58f69f2009-11-29 15:08:41 +000048 [LOOPBACK_GMII] = "GMII",
49 [LOOPBACK_SGMII] = "SGMII",
50 [LOOPBACK_XGBR] = "XGBR",
51 [LOOPBACK_XFI] = "XFI",
52 [LOOPBACK_XAUI_FAR] = "XAUI_FAR",
53 [LOOPBACK_GMII_FAR] = "GMII_FAR",
54 [LOOPBACK_SGMII_FAR] = "SGMII_FAR",
55 [LOOPBACK_XFI_FAR] = "XFI_FAR",
Ben Hutchingsc4593022009-11-23 16:08:17 +000056 [LOOPBACK_GPHY] = "GPHY",
57 [LOOPBACK_PHYXS] = "PHYXS",
58 [LOOPBACK_PCS] = "PCS",
59 [LOOPBACK_PMAPMD] = "PMA/PMD",
Ben Hutchingse58f69f2009-11-29 15:08:41 +000060 [LOOPBACK_XPORT] = "XPORT",
61 [LOOPBACK_XGMII_WS] = "XGMII_WS",
62 [LOOPBACK_XAUI_WS] = "XAUI_WS",
63 [LOOPBACK_XAUI_WS_FAR] = "XAUI_WS_FAR",
64 [LOOPBACK_XAUI_WS_NEAR] = "XAUI_WS_NEAR",
65 [LOOPBACK_GMII_WS] = "GMII_WS",
66 [LOOPBACK_XFI_WS] = "XFI_WS",
67 [LOOPBACK_XFI_WS_FAR] = "XFI_WS_FAR",
68 [LOOPBACK_PHYXS_WS] = "PHYXS_WS",
Ben Hutchingsc4593022009-11-23 16:08:17 +000069};
70
71/* Interrupt mode names (see INT_MODE())) */
72const unsigned int efx_interrupt_mode_max = EFX_INT_MODE_MAX;
73const char *efx_interrupt_mode_names[] = {
74 [EFX_INT_MODE_MSIX] = "MSI-X",
75 [EFX_INT_MODE_MSI] = "MSI",
76 [EFX_INT_MODE_LEGACY] = "legacy",
77};
78
79const unsigned int efx_reset_type_max = RESET_TYPE_MAX;
80const char *efx_reset_type_names[] = {
81 [RESET_TYPE_INVISIBLE] = "INVISIBLE",
82 [RESET_TYPE_ALL] = "ALL",
83 [RESET_TYPE_WORLD] = "WORLD",
84 [RESET_TYPE_DISABLE] = "DISABLE",
85 [RESET_TYPE_TX_WATCHDOG] = "TX_WATCHDOG",
86 [RESET_TYPE_INT_ERROR] = "INT_ERROR",
87 [RESET_TYPE_RX_RECOVERY] = "RX_RECOVERY",
88 [RESET_TYPE_RX_DESC_FETCH] = "RX_DESC_FETCH",
89 [RESET_TYPE_TX_DESC_FETCH] = "TX_DESC_FETCH",
90 [RESET_TYPE_TX_SKIP] = "TX_SKIP",
Ben Hutchings8880f4e2009-11-29 15:15:41 +000091 [RESET_TYPE_MC_FAILURE] = "MC_FAILURE",
Ben Hutchingsc4593022009-11-23 16:08:17 +000092};
93
Ben Hutchings8ceee662008-04-27 12:55:59 +010094#define EFX_MAX_MTU (9 * 1024)
95
Steve Hodgson1ab00622008-12-12 21:33:02 -080096/* Reset workqueue. If any NIC has a hardware failure then a reset will be
97 * queued onto this work queue. This is not a per-nic work queue, because
98 * efx_reset_work() acquires the rtnl lock, so resets are naturally serialised.
99 */
100static struct workqueue_struct *reset_workqueue;
101
Ben Hutchings8ceee662008-04-27 12:55:59 +0100102/**************************************************************************
103 *
104 * Configurable values
105 *
106 *************************************************************************/
107
108/*
Ben Hutchings8ceee662008-04-27 12:55:59 +0100109 * Use separate channels for TX and RX events
110 *
Neil Turton28b581a2008-12-12 21:41:06 -0800111 * Set this to 1 to use separate channels for TX and RX. It allows us
112 * to control interrupt affinity separately for TX and RX.
Ben Hutchings8ceee662008-04-27 12:55:59 +0100113 *
Neil Turton28b581a2008-12-12 21:41:06 -0800114 * This is only used in MSI-X interrupt mode
Ben Hutchings8ceee662008-04-27 12:55:59 +0100115 */
Neil Turton28b581a2008-12-12 21:41:06 -0800116static unsigned int separate_tx_channels;
117module_param(separate_tx_channels, uint, 0644);
118MODULE_PARM_DESC(separate_tx_channels,
119 "Use separate channels for TX and RX");
Ben Hutchings8ceee662008-04-27 12:55:59 +0100120
121/* This is the weight assigned to each of the (per-channel) virtual
122 * NAPI devices.
123 */
124static int napi_weight = 64;
125
126/* This is the time (in jiffies) between invocations of the hardware
127 * monitor, which checks for known hardware bugs and resets the
128 * hardware and driver as necessary.
129 */
130unsigned int efx_monitor_interval = 1 * HZ;
131
Ben Hutchings8ceee662008-04-27 12:55:59 +0100132/* This controls whether or not the driver will initialise devices
133 * with invalid MAC addresses stored in the EEPROM or flash. If true,
134 * such devices will be initialised with a random locally-generated
135 * MAC address. This allows for loading the sfc_mtd driver to
136 * reprogram the flash, even if the flash contents (including the MAC
137 * address) have previously been erased.
138 */
139static unsigned int allow_bad_hwaddr;
140
141/* Initial interrupt moderation settings. They can be modified after
142 * module load with ethtool.
143 *
144 * The default for RX should strike a balance between increasing the
145 * round-trip latency and reducing overhead.
146 */
147static unsigned int rx_irq_mod_usec = 60;
148
149/* Initial interrupt moderation settings. They can be modified after
150 * module load with ethtool.
151 *
152 * This default is chosen to ensure that a 10G link does not go idle
153 * while a TX queue is stopped after it has become full. A queue is
154 * restarted when it drops below half full. The time this takes (assuming
155 * worst case 3 descriptors per packet and 1024 descriptors) is
156 * 512 / 3 * 1.2 = 205 usec.
157 */
158static unsigned int tx_irq_mod_usec = 150;
159
160/* This is the first interrupt mode to try out of:
161 * 0 => MSI-X
162 * 1 => MSI
163 * 2 => legacy
164 */
165static unsigned int interrupt_mode;
166
167/* This is the requested number of CPUs to use for Receive-Side Scaling (RSS),
168 * i.e. the number of CPUs among which we may distribute simultaneous
169 * interrupt handling.
170 *
171 * Cards without MSI-X will only target one CPU via legacy or MSI interrupt.
172 * The default (0) means to assign an interrupt to each package (level II cache)
173 */
174static unsigned int rss_cpus;
175module_param(rss_cpus, uint, 0444);
176MODULE_PARM_DESC(rss_cpus, "Number of CPUs to use for Receive-Side Scaling");
177
Ben Hutchings84ae48f2008-12-12 21:34:54 -0800178static int phy_flash_cfg;
179module_param(phy_flash_cfg, int, 0644);
180MODULE_PARM_DESC(phy_flash_cfg, "Set PHYs into reflash mode initially");
181
Ben Hutchings6fb70fd2009-03-20 13:30:37 +0000182static unsigned irq_adapt_low_thresh = 10000;
183module_param(irq_adapt_low_thresh, uint, 0644);
184MODULE_PARM_DESC(irq_adapt_low_thresh,
185 "Threshold score for reducing IRQ moderation");
186
187static unsigned irq_adapt_high_thresh = 20000;
188module_param(irq_adapt_high_thresh, uint, 0644);
189MODULE_PARM_DESC(irq_adapt_high_thresh,
190 "Threshold score for increasing IRQ moderation");
191
Ben Hutchings8ceee662008-04-27 12:55:59 +0100192/**************************************************************************
193 *
194 * Utility functions and prototypes
195 *
196 *************************************************************************/
197static void efx_remove_channel(struct efx_channel *channel);
198static void efx_remove_port(struct efx_nic *efx);
199static void efx_fini_napi(struct efx_nic *efx);
200static void efx_fini_channels(struct efx_nic *efx);
201
202#define EFX_ASSERT_RESET_SERIALISED(efx) \
203 do { \
Ben Hutchings332c1ce2009-11-25 16:08:52 +0000204 if ((efx->state == STATE_RUNNING) || \
205 (efx->state == STATE_DISABLED)) \
Ben Hutchings8ceee662008-04-27 12:55:59 +0100206 ASSERT_RTNL(); \
207 } while (0)
208
209/**************************************************************************
210 *
211 * Event queue processing
212 *
213 *************************************************************************/
214
215/* Process channel's event queue
216 *
217 * This function is responsible for processing the event queue of a
218 * single channel. The caller must guarantee that this function will
219 * never be concurrently called more than once on the same channel,
220 * though different channels may be being processed concurrently.
221 */
Ben Hutchingsfa236e12010-04-28 09:29:42 +0000222static int efx_process_channel(struct efx_channel *channel, int budget)
Ben Hutchings8ceee662008-04-27 12:55:59 +0100223{
Ben Hutchings42cbe2d2008-09-01 12:48:08 +0100224 struct efx_nic *efx = channel->efx;
Ben Hutchingsfa236e12010-04-28 09:29:42 +0000225 int spent;
Ben Hutchings8ceee662008-04-27 12:55:59 +0100226
Ben Hutchings42cbe2d2008-09-01 12:48:08 +0100227 if (unlikely(efx->reset_pending != RESET_TYPE_NONE ||
Ben Hutchings8ceee662008-04-27 12:55:59 +0100228 !channel->enabled))
Ben Hutchings42cbe2d2008-09-01 12:48:08 +0100229 return 0;
Ben Hutchings8ceee662008-04-27 12:55:59 +0100230
Ben Hutchingsfa236e12010-04-28 09:29:42 +0000231 spent = efx_nic_process_eventq(channel, budget);
232 if (spent == 0)
Ben Hutchings42cbe2d2008-09-01 12:48:08 +0100233 return 0;
Ben Hutchings8ceee662008-04-27 12:55:59 +0100234
235 /* Deliver last RX packet. */
236 if (channel->rx_pkt) {
237 __efx_rx_packet(channel, channel->rx_pkt,
238 channel->rx_pkt_csummed);
239 channel->rx_pkt = NULL;
240 }
241
Ben Hutchings8ceee662008-04-27 12:55:59 +0100242 efx_rx_strategy(channel);
243
Ben Hutchings42cbe2d2008-09-01 12:48:08 +0100244 efx_fast_push_rx_descriptors(&efx->rx_queue[channel->channel]);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100245
Ben Hutchingsfa236e12010-04-28 09:29:42 +0000246 return spent;
Ben Hutchings8ceee662008-04-27 12:55:59 +0100247}
248
249/* Mark channel as finished processing
250 *
251 * Note that since we will not receive further interrupts for this
252 * channel before we finish processing and call the eventq_read_ack()
253 * method, there is no need to use the interrupt hold-off timers.
254 */
255static inline void efx_channel_processed(struct efx_channel *channel)
256{
Ben Hutchings5b9e2072008-05-16 21:18:14 +0100257 /* The interrupt handler for this channel may set work_pending
258 * as soon as we acknowledge the events we've seen. Make sure
259 * it's cleared before then. */
Ben Hutchingsdc8cfa52008-09-01 12:46:50 +0100260 channel->work_pending = false;
Ben Hutchings5b9e2072008-05-16 21:18:14 +0100261 smp_wmb();
262
Ben Hutchings152b6a62009-11-29 03:43:56 +0000263 efx_nic_eventq_read_ack(channel);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100264}
265
266/* NAPI poll handler
267 *
268 * NAPI guarantees serialisation of polls of the same device, which
269 * provides the guarantee required by efx_process_channel().
270 */
271static int efx_poll(struct napi_struct *napi, int budget)
272{
273 struct efx_channel *channel =
274 container_of(napi, struct efx_channel, napi_str);
Ben Hutchingsfa236e12010-04-28 09:29:42 +0000275 int spent;
Ben Hutchings8ceee662008-04-27 12:55:59 +0100276
277 EFX_TRACE(channel->efx, "channel %d NAPI poll executing on CPU %d\n",
278 channel->channel, raw_smp_processor_id());
279
Ben Hutchingsfa236e12010-04-28 09:29:42 +0000280 spent = efx_process_channel(channel, budget);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100281
Ben Hutchingsfa236e12010-04-28 09:29:42 +0000282 if (spent < budget) {
Ben Hutchings6fb70fd2009-03-20 13:30:37 +0000283 struct efx_nic *efx = channel->efx;
284
Ben Hutchingsa4900ac2010-04-28 09:30:43 +0000285 if (channel->channel < efx->n_rx_channels &&
Ben Hutchings6fb70fd2009-03-20 13:30:37 +0000286 efx->irq_rx_adaptive &&
287 unlikely(++channel->irq_count == 1000)) {
Ben Hutchings6fb70fd2009-03-20 13:30:37 +0000288 if (unlikely(channel->irq_mod_score <
289 irq_adapt_low_thresh)) {
Ben Hutchings0d86ebd2009-10-23 08:32:13 +0000290 if (channel->irq_moderation > 1) {
291 channel->irq_moderation -= 1;
Ben Hutchingsef2b90e2009-11-29 03:42:31 +0000292 efx->type->push_irq_moderation(channel);
Ben Hutchings0d86ebd2009-10-23 08:32:13 +0000293 }
Ben Hutchings6fb70fd2009-03-20 13:30:37 +0000294 } else if (unlikely(channel->irq_mod_score >
295 irq_adapt_high_thresh)) {
Ben Hutchings0d86ebd2009-10-23 08:32:13 +0000296 if (channel->irq_moderation <
297 efx->irq_rx_moderation) {
298 channel->irq_moderation += 1;
Ben Hutchingsef2b90e2009-11-29 03:42:31 +0000299 efx->type->push_irq_moderation(channel);
Ben Hutchings0d86ebd2009-10-23 08:32:13 +0000300 }
Ben Hutchings6fb70fd2009-03-20 13:30:37 +0000301 }
Ben Hutchings6fb70fd2009-03-20 13:30:37 +0000302 channel->irq_count = 0;
303 channel->irq_mod_score = 0;
304 }
305
Ben Hutchings8ceee662008-04-27 12:55:59 +0100306 /* There is no race here; although napi_disable() will
Ben Hutchings288379f2009-01-19 16:43:59 -0800307 * only wait for napi_complete(), this isn't a problem
Ben Hutchings8ceee662008-04-27 12:55:59 +0100308 * since efx_channel_processed() will have no effect if
309 * interrupts have already been disabled.
310 */
Ben Hutchings288379f2009-01-19 16:43:59 -0800311 napi_complete(napi);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100312 efx_channel_processed(channel);
313 }
314
Ben Hutchingsfa236e12010-04-28 09:29:42 +0000315 return spent;
Ben Hutchings8ceee662008-04-27 12:55:59 +0100316}
317
318/* Process the eventq of the specified channel immediately on this CPU
319 *
320 * Disable hardware generated interrupts, wait for any existing
321 * processing to finish, then directly poll (and ack ) the eventq.
322 * Finally reenable NAPI and interrupts.
323 *
324 * Since we are touching interrupts the caller should hold the suspend lock
325 */
326void efx_process_channel_now(struct efx_channel *channel)
327{
328 struct efx_nic *efx = channel->efx;
329
Ben Hutchings8ceee662008-04-27 12:55:59 +0100330 BUG_ON(!channel->enabled);
331
332 /* Disable interrupts and wait for ISRs to complete */
Ben Hutchings152b6a62009-11-29 03:43:56 +0000333 efx_nic_disable_interrupts(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100334 if (efx->legacy_irq)
335 synchronize_irq(efx->legacy_irq);
Ben Hutchings64ee3122008-09-01 12:47:38 +0100336 if (channel->irq)
Ben Hutchings8ceee662008-04-27 12:55:59 +0100337 synchronize_irq(channel->irq);
338
339 /* Wait for any NAPI processing to complete */
340 napi_disable(&channel->napi_str);
341
342 /* Poll the channel */
Ben Hutchings3ffeabd2009-10-23 08:30:58 +0000343 efx_process_channel(channel, EFX_EVQ_SIZE);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100344
345 /* Ack the eventq. This may cause an interrupt to be generated
346 * when they are reenabled */
347 efx_channel_processed(channel);
348
349 napi_enable(&channel->napi_str);
Ben Hutchings152b6a62009-11-29 03:43:56 +0000350 efx_nic_enable_interrupts(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100351}
352
353/* Create event queue
354 * Event queue memory allocations are done only once. If the channel
355 * is reset, the memory buffer will be reused; this guards against
356 * errors during channel reset and also simplifies interrupt handling.
357 */
358static int efx_probe_eventq(struct efx_channel *channel)
359{
360 EFX_LOG(channel->efx, "chan %d create event queue\n", channel->channel);
361
Ben Hutchings152b6a62009-11-29 03:43:56 +0000362 return efx_nic_probe_eventq(channel);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100363}
364
365/* Prepare channel's event queue */
Ben Hutchingsbc3c90a2008-09-01 12:48:46 +0100366static void efx_init_eventq(struct efx_channel *channel)
Ben Hutchings8ceee662008-04-27 12:55:59 +0100367{
368 EFX_LOG(channel->efx, "chan %d init event queue\n", channel->channel);
369
370 channel->eventq_read_ptr = 0;
371
Ben Hutchings152b6a62009-11-29 03:43:56 +0000372 efx_nic_init_eventq(channel);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100373}
374
375static void efx_fini_eventq(struct efx_channel *channel)
376{
377 EFX_LOG(channel->efx, "chan %d fini event queue\n", channel->channel);
378
Ben Hutchings152b6a62009-11-29 03:43:56 +0000379 efx_nic_fini_eventq(channel);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100380}
381
382static void efx_remove_eventq(struct efx_channel *channel)
383{
384 EFX_LOG(channel->efx, "chan %d remove event queue\n", channel->channel);
385
Ben Hutchings152b6a62009-11-29 03:43:56 +0000386 efx_nic_remove_eventq(channel);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100387}
388
389/**************************************************************************
390 *
391 * Channel handling
392 *
393 *************************************************************************/
394
Ben Hutchings8ceee662008-04-27 12:55:59 +0100395static int efx_probe_channel(struct efx_channel *channel)
396{
397 struct efx_tx_queue *tx_queue;
398 struct efx_rx_queue *rx_queue;
399 int rc;
400
401 EFX_LOG(channel->efx, "creating channel %d\n", channel->channel);
402
403 rc = efx_probe_eventq(channel);
404 if (rc)
405 goto fail1;
406
407 efx_for_each_channel_tx_queue(tx_queue, channel) {
408 rc = efx_probe_tx_queue(tx_queue);
409 if (rc)
410 goto fail2;
411 }
412
413 efx_for_each_channel_rx_queue(rx_queue, channel) {
414 rc = efx_probe_rx_queue(rx_queue);
415 if (rc)
416 goto fail3;
417 }
418
419 channel->n_rx_frm_trunc = 0;
420
421 return 0;
422
423 fail3:
424 efx_for_each_channel_rx_queue(rx_queue, channel)
425 efx_remove_rx_queue(rx_queue);
426 fail2:
427 efx_for_each_channel_tx_queue(tx_queue, channel)
428 efx_remove_tx_queue(tx_queue);
429 fail1:
430 return rc;
431}
432
433
Ben Hutchings56536e92008-12-12 21:37:02 -0800434static void efx_set_channel_names(struct efx_nic *efx)
435{
436 struct efx_channel *channel;
437 const char *type = "";
438 int number;
439
440 efx_for_each_channel(channel, efx) {
441 number = channel->channel;
Ben Hutchingsa4900ac2010-04-28 09:30:43 +0000442 if (efx->n_channels > efx->n_rx_channels) {
443 if (channel->channel < efx->n_rx_channels) {
Ben Hutchings56536e92008-12-12 21:37:02 -0800444 type = "-rx";
445 } else {
446 type = "-tx";
Ben Hutchingsa4900ac2010-04-28 09:30:43 +0000447 number -= efx->n_rx_channels;
Ben Hutchings56536e92008-12-12 21:37:02 -0800448 }
449 }
450 snprintf(channel->name, sizeof(channel->name),
451 "%s%s-%d", efx->name, type, number);
452 }
453}
454
Ben Hutchings8ceee662008-04-27 12:55:59 +0100455/* Channels are shutdown and reinitialised whilst the NIC is running
456 * to propagate configuration changes (mtu, checksum offload), or
457 * to clear hardware error conditions
458 */
Ben Hutchingsbc3c90a2008-09-01 12:48:46 +0100459static void efx_init_channels(struct efx_nic *efx)
Ben Hutchings8ceee662008-04-27 12:55:59 +0100460{
461 struct efx_tx_queue *tx_queue;
462 struct efx_rx_queue *rx_queue;
463 struct efx_channel *channel;
Ben Hutchings8ceee662008-04-27 12:55:59 +0100464
Ben Hutchingsf7f13b02008-05-16 21:15:06 +0100465 /* Calculate the rx buffer allocation parameters required to
466 * support the current MTU, including padding for header
467 * alignment and overruns.
468 */
469 efx->rx_buffer_len = (max(EFX_PAGE_IP_ALIGN, NET_IP_ALIGN) +
470 EFX_MAX_FRAME_LEN(efx->net_dev->mtu) +
471 efx->type->rx_buffer_padding);
Steve Hodgson62b330b2010-06-01 11:20:53 +0000472 efx->rx_buffer_order = get_order(efx->rx_buffer_len +
473 sizeof(struct efx_rx_page_state));
Ben Hutchings8ceee662008-04-27 12:55:59 +0100474
475 /* Initialise the channels */
476 efx_for_each_channel(channel, efx) {
477 EFX_LOG(channel->efx, "init chan %d\n", channel->channel);
478
Ben Hutchingsbc3c90a2008-09-01 12:48:46 +0100479 efx_init_eventq(channel);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100480
Ben Hutchingsbc3c90a2008-09-01 12:48:46 +0100481 efx_for_each_channel_tx_queue(tx_queue, channel)
482 efx_init_tx_queue(tx_queue);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100483
484 /* The rx buffer allocation strategy is MTU dependent */
485 efx_rx_strategy(channel);
486
Ben Hutchingsbc3c90a2008-09-01 12:48:46 +0100487 efx_for_each_channel_rx_queue(rx_queue, channel)
488 efx_init_rx_queue(rx_queue);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100489
490 WARN_ON(channel->rx_pkt != NULL);
491 efx_rx_strategy(channel);
492 }
Ben Hutchings8ceee662008-04-27 12:55:59 +0100493}
494
495/* This enables event queue processing and packet transmission.
496 *
497 * Note that this function is not allowed to fail, since that would
498 * introduce too much complexity into the suspend/resume path.
499 */
500static void efx_start_channel(struct efx_channel *channel)
501{
502 struct efx_rx_queue *rx_queue;
503
504 EFX_LOG(channel->efx, "starting chan %d\n", channel->channel);
505
Ben Hutchings5b9e2072008-05-16 21:18:14 +0100506 /* The interrupt handler for this channel may set work_pending
507 * as soon as we enable it. Make sure it's cleared before
508 * then. Similarly, make sure it sees the enabled flag set. */
Ben Hutchingsdc8cfa52008-09-01 12:46:50 +0100509 channel->work_pending = false;
510 channel->enabled = true;
Ben Hutchings5b9e2072008-05-16 21:18:14 +0100511 smp_wmb();
Ben Hutchings8ceee662008-04-27 12:55:59 +0100512
Steve Hodgson90d683a2010-06-01 11:19:39 +0000513 /* Fill the queues before enabling NAPI */
Ben Hutchings8ceee662008-04-27 12:55:59 +0100514 efx_for_each_channel_rx_queue(rx_queue, channel)
515 efx_fast_push_rx_descriptors(rx_queue);
Steve Hodgson90d683a2010-06-01 11:19:39 +0000516
517 napi_enable(&channel->napi_str);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100518}
519
520/* This disables event queue processing and packet transmission.
521 * This function does not guarantee that all queue processing
522 * (e.g. RX refill) is complete.
523 */
524static void efx_stop_channel(struct efx_channel *channel)
525{
Ben Hutchings8ceee662008-04-27 12:55:59 +0100526 if (!channel->enabled)
527 return;
528
529 EFX_LOG(channel->efx, "stop chan %d\n", channel->channel);
530
Ben Hutchingsdc8cfa52008-09-01 12:46:50 +0100531 channel->enabled = false;
Ben Hutchings8ceee662008-04-27 12:55:59 +0100532 napi_disable(&channel->napi_str);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100533}
534
535static void efx_fini_channels(struct efx_nic *efx)
536{
537 struct efx_channel *channel;
538 struct efx_tx_queue *tx_queue;
539 struct efx_rx_queue *rx_queue;
Ben Hutchings6bc5d3a2008-09-01 12:49:37 +0100540 int rc;
Ben Hutchings8ceee662008-04-27 12:55:59 +0100541
542 EFX_ASSERT_RESET_SERIALISED(efx);
543 BUG_ON(efx->port_enabled);
544
Ben Hutchings152b6a62009-11-29 03:43:56 +0000545 rc = efx_nic_flush_queues(efx);
Steve Hodgsonfd371e32010-06-01 11:17:51 +0000546 if (rc && EFX_WORKAROUND_7803(efx)) {
547 /* Schedule a reset to recover from the flush failure. The
548 * descriptor caches reference memory we're about to free,
549 * but falcon_reconfigure_mac_wrapper() won't reconnect
550 * the MACs because of the pending reset. */
551 EFX_ERR(efx, "Resetting to recover from flush failure\n");
552 efx_schedule_reset(efx, RESET_TYPE_ALL);
553 } else if (rc) {
Ben Hutchings6bc5d3a2008-09-01 12:49:37 +0100554 EFX_ERR(efx, "failed to flush queues\n");
Steve Hodgsonfd371e32010-06-01 11:17:51 +0000555 } else {
Ben Hutchings6bc5d3a2008-09-01 12:49:37 +0100556 EFX_LOG(efx, "successfully flushed all queues\n");
Steve Hodgsonfd371e32010-06-01 11:17:51 +0000557 }
Ben Hutchings6bc5d3a2008-09-01 12:49:37 +0100558
Ben Hutchings8ceee662008-04-27 12:55:59 +0100559 efx_for_each_channel(channel, efx) {
560 EFX_LOG(channel->efx, "shut down chan %d\n", channel->channel);
561
562 efx_for_each_channel_rx_queue(rx_queue, channel)
563 efx_fini_rx_queue(rx_queue);
564 efx_for_each_channel_tx_queue(tx_queue, channel)
565 efx_fini_tx_queue(tx_queue);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100566 efx_fini_eventq(channel);
567 }
568}
569
570static void efx_remove_channel(struct efx_channel *channel)
571{
572 struct efx_tx_queue *tx_queue;
573 struct efx_rx_queue *rx_queue;
574
575 EFX_LOG(channel->efx, "destroy chan %d\n", channel->channel);
576
577 efx_for_each_channel_rx_queue(rx_queue, channel)
578 efx_remove_rx_queue(rx_queue);
579 efx_for_each_channel_tx_queue(tx_queue, channel)
580 efx_remove_tx_queue(tx_queue);
581 efx_remove_eventq(channel);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100582}
583
Steve Hodgson90d683a2010-06-01 11:19:39 +0000584void efx_schedule_slow_fill(struct efx_rx_queue *rx_queue)
Ben Hutchings8ceee662008-04-27 12:55:59 +0100585{
Steve Hodgson90d683a2010-06-01 11:19:39 +0000586 mod_timer(&rx_queue->slow_fill, jiffies + msecs_to_jiffies(100));
Ben Hutchings8ceee662008-04-27 12:55:59 +0100587}
588
589/**************************************************************************
590 *
591 * Port handling
592 *
593 **************************************************************************/
594
595/* This ensures that the kernel is kept informed (via
596 * netif_carrier_on/off) of the link status, and also maintains the
597 * link status's stop on the port's TX queue.
598 */
Steve Hodgsonfdaa9ae2009-11-28 05:34:05 +0000599void efx_link_status_changed(struct efx_nic *efx)
Ben Hutchings8ceee662008-04-27 12:55:59 +0100600{
Ben Hutchingseb50c0d2009-11-23 16:06:30 +0000601 struct efx_link_state *link_state = &efx->link_state;
602
Ben Hutchings8ceee662008-04-27 12:55:59 +0100603 /* SFC Bug 5356: A net_dev notifier is registered, so we must ensure
604 * that no events are triggered between unregister_netdev() and the
605 * driver unloading. A more general condition is that NETDEV_CHANGE
606 * can only be generated between NETDEV_UP and NETDEV_DOWN */
607 if (!netif_running(efx->net_dev))
608 return;
609
Ben Hutchings8c8661e2008-09-01 12:49:02 +0100610 if (efx->port_inhibited) {
611 netif_carrier_off(efx->net_dev);
612 return;
613 }
614
Ben Hutchingseb50c0d2009-11-23 16:06:30 +0000615 if (link_state->up != netif_carrier_ok(efx->net_dev)) {
Ben Hutchings8ceee662008-04-27 12:55:59 +0100616 efx->n_link_state_changes++;
617
Ben Hutchingseb50c0d2009-11-23 16:06:30 +0000618 if (link_state->up)
Ben Hutchings8ceee662008-04-27 12:55:59 +0100619 netif_carrier_on(efx->net_dev);
620 else
621 netif_carrier_off(efx->net_dev);
622 }
623
624 /* Status message for kernel log */
Ben Hutchingseb50c0d2009-11-23 16:06:30 +0000625 if (link_state->up) {
Ben Hutchingsf31a45d2008-12-12 21:43:33 -0800626 EFX_INFO(efx, "link up at %uMbps %s-duplex (MTU %d)%s\n",
Ben Hutchingseb50c0d2009-11-23 16:06:30 +0000627 link_state->speed, link_state->fd ? "full" : "half",
Ben Hutchings8ceee662008-04-27 12:55:59 +0100628 efx->net_dev->mtu,
629 (efx->promiscuous ? " [PROMISC]" : ""));
630 } else {
631 EFX_INFO(efx, "link down\n");
632 }
633
634}
635
Ben Hutchingsd3245b22009-11-29 03:42:41 +0000636void efx_link_set_advertising(struct efx_nic *efx, u32 advertising)
637{
638 efx->link_advertising = advertising;
639 if (advertising) {
640 if (advertising & ADVERTISED_Pause)
641 efx->wanted_fc |= (EFX_FC_TX | EFX_FC_RX);
642 else
643 efx->wanted_fc &= ~(EFX_FC_TX | EFX_FC_RX);
644 if (advertising & ADVERTISED_Asym_Pause)
645 efx->wanted_fc ^= EFX_FC_TX;
646 }
647}
648
649void efx_link_set_wanted_fc(struct efx_nic *efx, enum efx_fc_type wanted_fc)
650{
651 efx->wanted_fc = wanted_fc;
652 if (efx->link_advertising) {
653 if (wanted_fc & EFX_FC_RX)
654 efx->link_advertising |= (ADVERTISED_Pause |
655 ADVERTISED_Asym_Pause);
656 else
657 efx->link_advertising &= ~(ADVERTISED_Pause |
658 ADVERTISED_Asym_Pause);
659 if (wanted_fc & EFX_FC_TX)
660 efx->link_advertising ^= ADVERTISED_Asym_Pause;
661 }
662}
663
Ben Hutchings115122a2009-03-04 09:52:52 +0000664static void efx_fini_port(struct efx_nic *efx);
665
Ben Hutchingsd3245b22009-11-29 03:42:41 +0000666/* Push loopback/power/transmit disable settings to the PHY, and reconfigure
667 * the MAC appropriately. All other PHY configuration changes are pushed
668 * through phy_op->set_settings(), and pushed asynchronously to the MAC
669 * through efx_monitor().
670 *
671 * Callers must hold the mac_lock
672 */
673int __efx_reconfigure_port(struct efx_nic *efx)
Ben Hutchings8ceee662008-04-27 12:55:59 +0100674{
Ben Hutchingsd3245b22009-11-29 03:42:41 +0000675 enum efx_phy_mode phy_mode;
676 int rc;
Ben Hutchings8ceee662008-04-27 12:55:59 +0100677
Ben Hutchingsd3245b22009-11-29 03:42:41 +0000678 WARN_ON(!mutex_is_locked(&efx->mac_lock));
Ben Hutchings8ceee662008-04-27 12:55:59 +0100679
Ben Hutchingsa816f752008-09-01 12:49:12 +0100680 /* Serialise the promiscuous flag with efx_set_multicast_list. */
681 if (efx_dev_registered(efx)) {
682 netif_addr_lock_bh(efx->net_dev);
683 netif_addr_unlock_bh(efx->net_dev);
684 }
685
Ben Hutchingsd3245b22009-11-29 03:42:41 +0000686 /* Disable PHY transmit in mac level loopbacks */
687 phy_mode = efx->phy_mode;
Ben Hutchings177dfcd2008-12-12 21:50:08 -0800688 if (LOOPBACK_INTERNAL(efx))
689 efx->phy_mode |= PHY_MODE_TX_DISABLED;
690 else
691 efx->phy_mode &= ~PHY_MODE_TX_DISABLED;
Ben Hutchings177dfcd2008-12-12 21:50:08 -0800692
Ben Hutchingsd3245b22009-11-29 03:42:41 +0000693 rc = efx->type->reconfigure_port(efx);
Ben Hutchings177dfcd2008-12-12 21:50:08 -0800694
Ben Hutchingsd3245b22009-11-29 03:42:41 +0000695 if (rc)
696 efx->phy_mode = phy_mode;
Ben Hutchings8ceee662008-04-27 12:55:59 +0100697
Ben Hutchingsd3245b22009-11-29 03:42:41 +0000698 return rc;
Ben Hutchings8ceee662008-04-27 12:55:59 +0100699}
700
701/* Reinitialise the MAC to pick up new PHY settings, even if the port is
702 * disabled. */
Ben Hutchingsd3245b22009-11-29 03:42:41 +0000703int efx_reconfigure_port(struct efx_nic *efx)
Ben Hutchings8ceee662008-04-27 12:55:59 +0100704{
Ben Hutchingsd3245b22009-11-29 03:42:41 +0000705 int rc;
706
Ben Hutchings8ceee662008-04-27 12:55:59 +0100707 EFX_ASSERT_RESET_SERIALISED(efx);
708
709 mutex_lock(&efx->mac_lock);
Ben Hutchingsd3245b22009-11-29 03:42:41 +0000710 rc = __efx_reconfigure_port(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100711 mutex_unlock(&efx->mac_lock);
Ben Hutchingsd3245b22009-11-29 03:42:41 +0000712
713 return rc;
Ben Hutchings8ceee662008-04-27 12:55:59 +0100714}
715
Ben Hutchings8be4f3e2009-11-25 16:12:16 +0000716/* Asynchronous work item for changing MAC promiscuity and multicast
717 * hash. Avoid a drain/rx_ingress enable by reconfiguring the current
718 * MAC directly. */
Ben Hutchings766ca0f2008-12-12 21:59:24 -0800719static void efx_mac_work(struct work_struct *data)
720{
721 struct efx_nic *efx = container_of(data, struct efx_nic, mac_work);
722
723 mutex_lock(&efx->mac_lock);
Ben Hutchings8be4f3e2009-11-25 16:12:16 +0000724 if (efx->port_enabled) {
Ben Hutchingsef2b90e2009-11-29 03:42:31 +0000725 efx->type->push_multicast_hash(efx);
Ben Hutchings8be4f3e2009-11-25 16:12:16 +0000726 efx->mac_op->reconfigure(efx);
727 }
Ben Hutchings766ca0f2008-12-12 21:59:24 -0800728 mutex_unlock(&efx->mac_lock);
729}
730
Ben Hutchings8ceee662008-04-27 12:55:59 +0100731static int efx_probe_port(struct efx_nic *efx)
732{
733 int rc;
734
735 EFX_LOG(efx, "create port\n");
736
Steve Hodgsonff3b00a2009-12-23 13:46:36 +0000737 if (phy_flash_cfg)
738 efx->phy_mode = PHY_MODE_SPECIAL;
739
Ben Hutchingsef2b90e2009-11-29 03:42:31 +0000740 /* Connect up MAC/PHY operations table */
741 rc = efx->type->probe_port(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100742 if (rc)
743 goto err;
744
745 /* Sanity check MAC address */
746 if (is_valid_ether_addr(efx->mac_address)) {
747 memcpy(efx->net_dev->dev_addr, efx->mac_address, ETH_ALEN);
748 } else {
Johannes Berge1749612008-10-27 15:59:26 -0700749 EFX_ERR(efx, "invalid MAC address %pM\n",
750 efx->mac_address);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100751 if (!allow_bad_hwaddr) {
752 rc = -EINVAL;
753 goto err;
754 }
755 random_ether_addr(efx->net_dev->dev_addr);
Johannes Berge1749612008-10-27 15:59:26 -0700756 EFX_INFO(efx, "using locally-generated MAC %pM\n",
757 efx->net_dev->dev_addr);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100758 }
759
760 return 0;
761
762 err:
763 efx_remove_port(efx);
764 return rc;
765}
766
767static int efx_init_port(struct efx_nic *efx)
768{
769 int rc;
770
771 EFX_LOG(efx, "init port\n");
772
Ben Hutchings1dfc5ce2009-11-25 16:11:19 +0000773 mutex_lock(&efx->mac_lock);
774
Ben Hutchings177dfcd2008-12-12 21:50:08 -0800775 rc = efx->phy_op->init(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100776 if (rc)
Ben Hutchings1dfc5ce2009-11-25 16:11:19 +0000777 goto fail1;
Ben Hutchings8ceee662008-04-27 12:55:59 +0100778
Ben Hutchingsdc8cfa52008-09-01 12:46:50 +0100779 efx->port_initialized = true;
Ben Hutchings1dfc5ce2009-11-25 16:11:19 +0000780
Ben Hutchingsd3245b22009-11-29 03:42:41 +0000781 /* Reconfigure the MAC before creating dma queues (required for
782 * Falcon/A1 where RX_INGR_EN/TX_DRAIN_EN isn't supported) */
783 efx->mac_op->reconfigure(efx);
784
785 /* Ensure the PHY advertises the correct flow control settings */
786 rc = efx->phy_op->reconfigure(efx);
787 if (rc)
788 goto fail2;
789
Ben Hutchings1dfc5ce2009-11-25 16:11:19 +0000790 mutex_unlock(&efx->mac_lock);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100791 return 0;
Ben Hutchings177dfcd2008-12-12 21:50:08 -0800792
Ben Hutchings1dfc5ce2009-11-25 16:11:19 +0000793fail2:
Ben Hutchings177dfcd2008-12-12 21:50:08 -0800794 efx->phy_op->fini(efx);
Ben Hutchings1dfc5ce2009-11-25 16:11:19 +0000795fail1:
796 mutex_unlock(&efx->mac_lock);
Ben Hutchings177dfcd2008-12-12 21:50:08 -0800797 return rc;
Ben Hutchings8ceee662008-04-27 12:55:59 +0100798}
799
Ben Hutchings8ceee662008-04-27 12:55:59 +0100800static void efx_start_port(struct efx_nic *efx)
801{
802 EFX_LOG(efx, "start port\n");
803 BUG_ON(efx->port_enabled);
804
805 mutex_lock(&efx->mac_lock);
Ben Hutchingsdc8cfa52008-09-01 12:46:50 +0100806 efx->port_enabled = true;
Ben Hutchings8be4f3e2009-11-25 16:12:16 +0000807
808 /* efx_mac_work() might have been scheduled after efx_stop_port(),
809 * and then cancelled by efx_flush_all() */
Ben Hutchingsef2b90e2009-11-29 03:42:31 +0000810 efx->type->push_multicast_hash(efx);
Ben Hutchings8be4f3e2009-11-25 16:12:16 +0000811 efx->mac_op->reconfigure(efx);
812
Ben Hutchings8ceee662008-04-27 12:55:59 +0100813 mutex_unlock(&efx->mac_lock);
814}
815
Steve Hodgsonfdaa9ae2009-11-28 05:34:05 +0000816/* Prevent efx_mac_work() and efx_monitor() from working */
Ben Hutchings8ceee662008-04-27 12:55:59 +0100817static void efx_stop_port(struct efx_nic *efx)
818{
819 EFX_LOG(efx, "stop port\n");
820
821 mutex_lock(&efx->mac_lock);
Ben Hutchingsdc8cfa52008-09-01 12:46:50 +0100822 efx->port_enabled = false;
Ben Hutchings8ceee662008-04-27 12:55:59 +0100823 mutex_unlock(&efx->mac_lock);
824
825 /* Serialise against efx_set_multicast_list() */
Ben Hutchings55668612008-05-16 21:16:10 +0100826 if (efx_dev_registered(efx)) {
David S. Millerb9e40852008-07-15 00:15:08 -0700827 netif_addr_lock_bh(efx->net_dev);
828 netif_addr_unlock_bh(efx->net_dev);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100829 }
830}
831
832static void efx_fini_port(struct efx_nic *efx)
833{
834 EFX_LOG(efx, "shut down port\n");
835
836 if (!efx->port_initialized)
837 return;
838
Ben Hutchings177dfcd2008-12-12 21:50:08 -0800839 efx->phy_op->fini(efx);
Ben Hutchingsdc8cfa52008-09-01 12:46:50 +0100840 efx->port_initialized = false;
Ben Hutchings8ceee662008-04-27 12:55:59 +0100841
Ben Hutchingseb50c0d2009-11-23 16:06:30 +0000842 efx->link_state.up = false;
Ben Hutchings8ceee662008-04-27 12:55:59 +0100843 efx_link_status_changed(efx);
844}
845
846static void efx_remove_port(struct efx_nic *efx)
847{
848 EFX_LOG(efx, "destroying port\n");
849
Ben Hutchingsef2b90e2009-11-29 03:42:31 +0000850 efx->type->remove_port(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100851}
852
853/**************************************************************************
854 *
855 * NIC handling
856 *
857 **************************************************************************/
858
859/* This configures the PCI device to enable I/O and DMA. */
860static int efx_init_io(struct efx_nic *efx)
861{
862 struct pci_dev *pci_dev = efx->pci_dev;
863 dma_addr_t dma_mask = efx->type->max_dma_mask;
864 int rc;
865
866 EFX_LOG(efx, "initialising I/O\n");
867
868 rc = pci_enable_device(pci_dev);
869 if (rc) {
870 EFX_ERR(efx, "failed to enable PCI device\n");
871 goto fail1;
872 }
873
874 pci_set_master(pci_dev);
875
876 /* Set the PCI DMA mask. Try all possibilities from our
877 * genuine mask down to 32 bits, because some architectures
878 * (e.g. x86_64 with iommu_sac_force set) will allow 40 bit
879 * masks event though they reject 46 bit masks.
880 */
881 while (dma_mask > 0x7fffffffUL) {
882 if (pci_dma_supported(pci_dev, dma_mask) &&
883 ((rc = pci_set_dma_mask(pci_dev, dma_mask)) == 0))
884 break;
885 dma_mask >>= 1;
886 }
887 if (rc) {
888 EFX_ERR(efx, "could not find a suitable DMA mask\n");
889 goto fail2;
890 }
891 EFX_LOG(efx, "using DMA mask %llx\n", (unsigned long long) dma_mask);
892 rc = pci_set_consistent_dma_mask(pci_dev, dma_mask);
893 if (rc) {
894 /* pci_set_consistent_dma_mask() is not *allowed* to
895 * fail with a mask that pci_set_dma_mask() accepted,
896 * but just in case...
897 */
898 EFX_ERR(efx, "failed to set consistent DMA mask\n");
899 goto fail2;
900 }
901
Ben Hutchingsdc803df2009-10-23 08:32:33 +0000902 efx->membase_phys = pci_resource_start(efx->pci_dev, EFX_MEM_BAR);
903 rc = pci_request_region(pci_dev, EFX_MEM_BAR, "sfc");
Ben Hutchings8ceee662008-04-27 12:55:59 +0100904 if (rc) {
905 EFX_ERR(efx, "request for memory BAR failed\n");
906 rc = -EIO;
907 goto fail3;
908 }
909 efx->membase = ioremap_nocache(efx->membase_phys,
910 efx->type->mem_map_size);
911 if (!efx->membase) {
Ben Hutchingsdc803df2009-10-23 08:32:33 +0000912 EFX_ERR(efx, "could not map memory BAR at %llx+%x\n",
Ben Hutchings086ea352008-05-16 21:17:06 +0100913 (unsigned long long)efx->membase_phys,
Ben Hutchings8ceee662008-04-27 12:55:59 +0100914 efx->type->mem_map_size);
915 rc = -ENOMEM;
916 goto fail4;
917 }
Ben Hutchingsdc803df2009-10-23 08:32:33 +0000918 EFX_LOG(efx, "memory BAR at %llx+%x (virtual %p)\n",
919 (unsigned long long)efx->membase_phys,
Ben Hutchings086ea352008-05-16 21:17:06 +0100920 efx->type->mem_map_size, efx->membase);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100921
922 return 0;
923
924 fail4:
Ben Hutchingsdc803df2009-10-23 08:32:33 +0000925 pci_release_region(efx->pci_dev, EFX_MEM_BAR);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100926 fail3:
Ben Hutchings2c118e02008-05-16 21:15:29 +0100927 efx->membase_phys = 0;
Ben Hutchings8ceee662008-04-27 12:55:59 +0100928 fail2:
929 pci_disable_device(efx->pci_dev);
930 fail1:
931 return rc;
932}
933
934static void efx_fini_io(struct efx_nic *efx)
935{
936 EFX_LOG(efx, "shutting down I/O\n");
937
938 if (efx->membase) {
939 iounmap(efx->membase);
940 efx->membase = NULL;
941 }
942
943 if (efx->membase_phys) {
Ben Hutchingsdc803df2009-10-23 08:32:33 +0000944 pci_release_region(efx->pci_dev, EFX_MEM_BAR);
Ben Hutchings2c118e02008-05-16 21:15:29 +0100945 efx->membase_phys = 0;
Ben Hutchings8ceee662008-04-27 12:55:59 +0100946 }
947
948 pci_disable_device(efx->pci_dev);
949}
950
Ben Hutchingsa4900ac2010-04-28 09:30:43 +0000951/* Get number of channels wanted. Each channel will have its own IRQ,
952 * 1 RX queue and/or 2 TX queues. */
953static int efx_wanted_channels(void)
Ben Hutchings46123d02008-09-01 12:47:33 +0100954{
Rusty Russell2f8975f2009-01-10 21:58:09 -0800955 cpumask_var_t core_mask;
Ben Hutchings46123d02008-09-01 12:47:33 +0100956 int count;
957 int cpu;
958
Li Zefan79f55992009-06-15 14:58:26 +0800959 if (unlikely(!zalloc_cpumask_var(&core_mask, GFP_KERNEL))) {
Rusty Russell2f8975f2009-01-10 21:58:09 -0800960 printk(KERN_WARNING
Mike Travis3977d032009-05-12 10:48:36 +0000961 "sfc: RSS disabled due to allocation failure\n");
Rusty Russell2f8975f2009-01-10 21:58:09 -0800962 return 1;
963 }
964
Ben Hutchings46123d02008-09-01 12:47:33 +0100965 count = 0;
966 for_each_online_cpu(cpu) {
Rusty Russell2f8975f2009-01-10 21:58:09 -0800967 if (!cpumask_test_cpu(cpu, core_mask)) {
Ben Hutchings46123d02008-09-01 12:47:33 +0100968 ++count;
Rusty Russell2f8975f2009-01-10 21:58:09 -0800969 cpumask_or(core_mask, core_mask,
Rusty Russellfbd59a82009-01-10 21:58:08 -0800970 topology_core_cpumask(cpu));
Ben Hutchings46123d02008-09-01 12:47:33 +0100971 }
972 }
973
Rusty Russell2f8975f2009-01-10 21:58:09 -0800974 free_cpumask_var(core_mask);
Ben Hutchings46123d02008-09-01 12:47:33 +0100975 return count;
976}
977
978/* Probe the number and type of interrupts we are able to obtain, and
979 * the resulting numbers of channels and RX queues.
980 */
Ben Hutchings8ceee662008-04-27 12:55:59 +0100981static void efx_probe_interrupts(struct efx_nic *efx)
982{
Ben Hutchings46123d02008-09-01 12:47:33 +0100983 int max_channels =
984 min_t(int, efx->type->phys_addr_channels, EFX_MAX_CHANNELS);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100985 int rc, i;
986
987 if (efx->interrupt_mode == EFX_INT_MODE_MSIX) {
Ben Hutchings46123d02008-09-01 12:47:33 +0100988 struct msix_entry xentries[EFX_MAX_CHANNELS];
Ben Hutchingsa4900ac2010-04-28 09:30:43 +0000989 int n_channels;
Ben Hutchings8ceee662008-04-27 12:55:59 +0100990
Ben Hutchingsa4900ac2010-04-28 09:30:43 +0000991 n_channels = efx_wanted_channels();
992 if (separate_tx_channels)
993 n_channels *= 2;
994 n_channels = min(n_channels, max_channels);
Ben Hutchingsaa6ef272008-07-18 19:03:10 +0100995
Ben Hutchingsa4900ac2010-04-28 09:30:43 +0000996 for (i = 0; i < n_channels; i++)
Ben Hutchings8ceee662008-04-27 12:55:59 +0100997 xentries[i].entry = i;
Ben Hutchingsa4900ac2010-04-28 09:30:43 +0000998 rc = pci_enable_msix(efx->pci_dev, xentries, n_channels);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100999 if (rc > 0) {
Neil Turton28b581a2008-12-12 21:41:06 -08001000 EFX_ERR(efx, "WARNING: Insufficient MSI-X vectors"
Ben Hutchingsa4900ac2010-04-28 09:30:43 +00001001 " available (%d < %d).\n", rc, n_channels);
Neil Turton28b581a2008-12-12 21:41:06 -08001002 EFX_ERR(efx, "WARNING: Performance may be reduced.\n");
Ben Hutchingsa4900ac2010-04-28 09:30:43 +00001003 EFX_BUG_ON_PARANOID(rc >= n_channels);
1004 n_channels = rc;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001005 rc = pci_enable_msix(efx->pci_dev, xentries,
Ben Hutchingsa4900ac2010-04-28 09:30:43 +00001006 n_channels);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001007 }
1008
1009 if (rc == 0) {
Ben Hutchingsa4900ac2010-04-28 09:30:43 +00001010 efx->n_channels = n_channels;
1011 if (separate_tx_channels) {
1012 efx->n_tx_channels =
1013 max(efx->n_channels / 2, 1U);
1014 efx->n_rx_channels =
1015 max(efx->n_channels -
1016 efx->n_tx_channels, 1U);
1017 } else {
1018 efx->n_tx_channels = efx->n_channels;
1019 efx->n_rx_channels = efx->n_channels;
1020 }
1021 for (i = 0; i < n_channels; i++)
Ben Hutchings8ceee662008-04-27 12:55:59 +01001022 efx->channel[i].irq = xentries[i].vector;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001023 } else {
1024 /* Fall back to single channel MSI */
1025 efx->interrupt_mode = EFX_INT_MODE_MSI;
1026 EFX_ERR(efx, "could not enable MSI-X\n");
1027 }
1028 }
1029
1030 /* Try single interrupt MSI */
1031 if (efx->interrupt_mode == EFX_INT_MODE_MSI) {
Neil Turton28b581a2008-12-12 21:41:06 -08001032 efx->n_channels = 1;
Ben Hutchingsa4900ac2010-04-28 09:30:43 +00001033 efx->n_rx_channels = 1;
1034 efx->n_tx_channels = 1;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001035 rc = pci_enable_msi(efx->pci_dev);
1036 if (rc == 0) {
1037 efx->channel[0].irq = efx->pci_dev->irq;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001038 } else {
1039 EFX_ERR(efx, "could not enable MSI\n");
1040 efx->interrupt_mode = EFX_INT_MODE_LEGACY;
1041 }
1042 }
1043
1044 /* Assume legacy interrupts */
1045 if (efx->interrupt_mode == EFX_INT_MODE_LEGACY) {
Neil Turton28b581a2008-12-12 21:41:06 -08001046 efx->n_channels = 1 + (separate_tx_channels ? 1 : 0);
Ben Hutchingsa4900ac2010-04-28 09:30:43 +00001047 efx->n_rx_channels = 1;
1048 efx->n_tx_channels = 1;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001049 efx->legacy_irq = efx->pci_dev->irq;
1050 }
1051}
1052
1053static void efx_remove_interrupts(struct efx_nic *efx)
1054{
1055 struct efx_channel *channel;
1056
1057 /* Remove MSI/MSI-X interrupts */
Ben Hutchings64ee3122008-09-01 12:47:38 +01001058 efx_for_each_channel(channel, efx)
Ben Hutchings8ceee662008-04-27 12:55:59 +01001059 channel->irq = 0;
1060 pci_disable_msi(efx->pci_dev);
1061 pci_disable_msix(efx->pci_dev);
1062
1063 /* Remove legacy interrupt */
1064 efx->legacy_irq = 0;
1065}
1066
Ben Hutchings8831da72008-09-01 12:47:48 +01001067static void efx_set_channels(struct efx_nic *efx)
Ben Hutchings8ceee662008-04-27 12:55:59 +01001068{
Ben Hutchingsa4900ac2010-04-28 09:30:43 +00001069 struct efx_channel *channel;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001070 struct efx_tx_queue *tx_queue;
1071 struct efx_rx_queue *rx_queue;
Ben Hutchingsa4900ac2010-04-28 09:30:43 +00001072 unsigned tx_channel_offset =
1073 separate_tx_channels ? efx->n_channels - efx->n_tx_channels : 0;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001074
Ben Hutchingsa4900ac2010-04-28 09:30:43 +00001075 efx_for_each_channel(channel, efx) {
1076 if (channel->channel - tx_channel_offset < efx->n_tx_channels) {
1077 channel->tx_queue = &efx->tx_queue[
1078 (channel->channel - tx_channel_offset) *
1079 EFX_TXQ_TYPES];
1080 efx_for_each_channel_tx_queue(tx_queue, channel)
1081 tx_queue->channel = channel;
1082 }
Ben Hutchings60ac1062008-09-01 12:44:59 +01001083 }
Ben Hutchings8ceee662008-04-27 12:55:59 +01001084
Ben Hutchingsa4900ac2010-04-28 09:30:43 +00001085 efx_for_each_rx_queue(rx_queue, efx)
Ben Hutchings8831da72008-09-01 12:47:48 +01001086 rx_queue->channel = &efx->channel[rx_queue->queue];
Ben Hutchings8ceee662008-04-27 12:55:59 +01001087}
1088
1089static int efx_probe_nic(struct efx_nic *efx)
1090{
1091 int rc;
1092
1093 EFX_LOG(efx, "creating NIC\n");
1094
1095 /* Carry out hardware-type specific initialisation */
Ben Hutchingsef2b90e2009-11-29 03:42:31 +00001096 rc = efx->type->probe(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001097 if (rc)
1098 return rc;
1099
Ben Hutchingsa4900ac2010-04-28 09:30:43 +00001100 /* Determine the number of channels and queues by trying to hook
Ben Hutchings8ceee662008-04-27 12:55:59 +01001101 * in MSI-X interrupts. */
1102 efx_probe_interrupts(efx);
1103
Ben Hutchings8831da72008-09-01 12:47:48 +01001104 efx_set_channels(efx);
Ben Hutchingsa4900ac2010-04-28 09:30:43 +00001105 efx->net_dev->real_num_tx_queues = efx->n_tx_channels;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001106
1107 /* Initialise the interrupt moderation settings */
Ben Hutchings6fb70fd2009-03-20 13:30:37 +00001108 efx_init_irq_moderation(efx, tx_irq_mod_usec, rx_irq_mod_usec, true);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001109
1110 return 0;
1111}
1112
1113static void efx_remove_nic(struct efx_nic *efx)
1114{
1115 EFX_LOG(efx, "destroying NIC\n");
1116
1117 efx_remove_interrupts(efx);
Ben Hutchingsef2b90e2009-11-29 03:42:31 +00001118 efx->type->remove(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001119}
1120
1121/**************************************************************************
1122 *
1123 * NIC startup/shutdown
1124 *
1125 *************************************************************************/
1126
1127static int efx_probe_all(struct efx_nic *efx)
1128{
1129 struct efx_channel *channel;
1130 int rc;
1131
1132 /* Create NIC */
1133 rc = efx_probe_nic(efx);
1134 if (rc) {
1135 EFX_ERR(efx, "failed to create NIC\n");
1136 goto fail1;
1137 }
1138
1139 /* Create port */
1140 rc = efx_probe_port(efx);
1141 if (rc) {
1142 EFX_ERR(efx, "failed to create port\n");
1143 goto fail2;
1144 }
1145
1146 /* Create channels */
1147 efx_for_each_channel(channel, efx) {
1148 rc = efx_probe_channel(channel);
1149 if (rc) {
1150 EFX_ERR(efx, "failed to create channel %d\n",
1151 channel->channel);
1152 goto fail3;
1153 }
1154 }
Ben Hutchings56536e92008-12-12 21:37:02 -08001155 efx_set_channel_names(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001156
1157 return 0;
1158
1159 fail3:
1160 efx_for_each_channel(channel, efx)
1161 efx_remove_channel(channel);
1162 efx_remove_port(efx);
1163 fail2:
1164 efx_remove_nic(efx);
1165 fail1:
1166 return rc;
1167}
1168
1169/* Called after previous invocation(s) of efx_stop_all, restarts the
1170 * port, kernel transmit queue, NAPI processing and hardware interrupts,
1171 * and ensures that the port is scheduled to be reconfigured.
1172 * This function is safe to call multiple times when the NIC is in any
1173 * state. */
1174static void efx_start_all(struct efx_nic *efx)
1175{
1176 struct efx_channel *channel;
1177
1178 EFX_ASSERT_RESET_SERIALISED(efx);
1179
1180 /* Check that it is appropriate to restart the interface. All
1181 * of these flags are safe to read under just the rtnl lock */
1182 if (efx->port_enabled)
1183 return;
1184 if ((efx->state != STATE_RUNNING) && (efx->state != STATE_INIT))
1185 return;
Ben Hutchings55668612008-05-16 21:16:10 +01001186 if (efx_dev_registered(efx) && !netif_running(efx->net_dev))
Ben Hutchings8ceee662008-04-27 12:55:59 +01001187 return;
1188
1189 /* Mark the port as enabled so port reconfigurations can start, then
1190 * restart the transmit interface early so the watchdog timer stops */
1191 efx_start_port(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001192
Ben Hutchingsa4900ac2010-04-28 09:30:43 +00001193 efx_for_each_channel(channel, efx) {
1194 if (efx_dev_registered(efx))
1195 efx_wake_queue(channel);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001196 efx_start_channel(channel);
Ben Hutchingsa4900ac2010-04-28 09:30:43 +00001197 }
Ben Hutchings8ceee662008-04-27 12:55:59 +01001198
Ben Hutchings152b6a62009-11-29 03:43:56 +00001199 efx_nic_enable_interrupts(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001200
Ben Hutchings8880f4e2009-11-29 15:15:41 +00001201 /* Switch to event based MCDI completions after enabling interrupts.
1202 * If a reset has been scheduled, then we need to stay in polled mode.
1203 * Rather than serialising efx_mcdi_mode_event() [which sleeps] and
1204 * reset_pending [modified from an atomic context], we instead guarantee
1205 * that efx_mcdi_mode_poll() isn't reverted erroneously */
1206 efx_mcdi_mode_event(efx);
1207 if (efx->reset_pending != RESET_TYPE_NONE)
1208 efx_mcdi_mode_poll(efx);
1209
Steve Hodgson78c1f0a2009-11-29 03:43:00 +00001210 /* Start the hardware monitor if there is one. Otherwise (we're link
1211 * event driven), we have to poll the PHY because after an event queue
1212 * flush, we could have a missed a link state change */
1213 if (efx->type->monitor != NULL) {
Ben Hutchings8ceee662008-04-27 12:55:59 +01001214 queue_delayed_work(efx->workqueue, &efx->monitor_work,
1215 efx_monitor_interval);
Steve Hodgson78c1f0a2009-11-29 03:43:00 +00001216 } else {
1217 mutex_lock(&efx->mac_lock);
1218 if (efx->phy_op->poll(efx))
1219 efx_link_status_changed(efx);
1220 mutex_unlock(&efx->mac_lock);
1221 }
Ben Hutchings55edc6e2009-11-25 16:11:35 +00001222
Ben Hutchingsef2b90e2009-11-29 03:42:31 +00001223 efx->type->start_stats(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001224}
1225
1226/* Flush all delayed work. Should only be called when no more delayed work
1227 * will be scheduled. This doesn't flush pending online resets (efx_reset),
1228 * since we're holding the rtnl_lock at this point. */
1229static void efx_flush_all(struct efx_nic *efx)
1230{
Ben Hutchings8ceee662008-04-27 12:55:59 +01001231 /* Make sure the hardware monitor is stopped */
1232 cancel_delayed_work_sync(&efx->monitor_work);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001233 /* Stop scheduled port reconfigurations */
Ben Hutchings766ca0f2008-12-12 21:59:24 -08001234 cancel_work_sync(&efx->mac_work);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001235}
1236
1237/* Quiesce hardware and software without bringing the link down.
1238 * Safe to call multiple times, when the nic and interface is in any
1239 * state. The caller is guaranteed to subsequently be in a position
1240 * to modify any hardware and software state they see fit without
1241 * taking locks. */
1242static void efx_stop_all(struct efx_nic *efx)
1243{
1244 struct efx_channel *channel;
1245
1246 EFX_ASSERT_RESET_SERIALISED(efx);
1247
1248 /* port_enabled can be read safely under the rtnl lock */
1249 if (!efx->port_enabled)
1250 return;
1251
Ben Hutchingsef2b90e2009-11-29 03:42:31 +00001252 efx->type->stop_stats(efx);
Ben Hutchings55edc6e2009-11-25 16:11:35 +00001253
Ben Hutchings8880f4e2009-11-29 15:15:41 +00001254 /* Switch to MCDI polling on Siena before disabling interrupts */
1255 efx_mcdi_mode_poll(efx);
1256
Ben Hutchings8ceee662008-04-27 12:55:59 +01001257 /* Disable interrupts and wait for ISR to complete */
Ben Hutchings152b6a62009-11-29 03:43:56 +00001258 efx_nic_disable_interrupts(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001259 if (efx->legacy_irq)
1260 synchronize_irq(efx->legacy_irq);
Ben Hutchings64ee3122008-09-01 12:47:38 +01001261 efx_for_each_channel(channel, efx) {
Ben Hutchings8ceee662008-04-27 12:55:59 +01001262 if (channel->irq)
1263 synchronize_irq(channel->irq);
Ben Hutchingsb3475642008-05-16 21:15:49 +01001264 }
Ben Hutchings8ceee662008-04-27 12:55:59 +01001265
1266 /* Stop all NAPI processing and synchronous rx refills */
1267 efx_for_each_channel(channel, efx)
1268 efx_stop_channel(channel);
1269
1270 /* Stop all asynchronous port reconfigurations. Since all
1271 * event processing has already been stopped, there is no
1272 * window to loose phy events */
1273 efx_stop_port(efx);
1274
Steve Hodgsonfdaa9ae2009-11-28 05:34:05 +00001275 /* Flush efx_mac_work(), refill_workqueue, monitor_work */
Ben Hutchings8ceee662008-04-27 12:55:59 +01001276 efx_flush_all(efx);
1277
Ben Hutchings8ceee662008-04-27 12:55:59 +01001278 /* Stop the kernel transmit interface late, so the watchdog
1279 * timer isn't ticking over the flush */
Ben Hutchings55668612008-05-16 21:16:10 +01001280 if (efx_dev_registered(efx)) {
Ben Hutchingsa4900ac2010-04-28 09:30:43 +00001281 struct efx_channel *channel;
1282 efx_for_each_channel(channel, efx)
1283 efx_stop_queue(channel);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001284 netif_tx_lock_bh(efx->net_dev);
1285 netif_tx_unlock_bh(efx->net_dev);
1286 }
1287}
1288
1289static void efx_remove_all(struct efx_nic *efx)
1290{
1291 struct efx_channel *channel;
1292
1293 efx_for_each_channel(channel, efx)
1294 efx_remove_channel(channel);
1295 efx_remove_port(efx);
1296 efx_remove_nic(efx);
1297}
1298
Ben Hutchings8ceee662008-04-27 12:55:59 +01001299/**************************************************************************
1300 *
1301 * Interrupt moderation
1302 *
1303 **************************************************************************/
1304
Ben Hutchings0d86ebd2009-10-23 08:32:13 +00001305static unsigned irq_mod_ticks(int usecs, int resolution)
1306{
1307 if (usecs <= 0)
1308 return 0; /* cannot receive interrupts ahead of time :-) */
1309 if (usecs < resolution)
1310 return 1; /* never round down to 0 */
1311 return usecs / resolution;
1312}
1313
Ben Hutchings8ceee662008-04-27 12:55:59 +01001314/* Set interrupt moderation parameters */
Ben Hutchings6fb70fd2009-03-20 13:30:37 +00001315void efx_init_irq_moderation(struct efx_nic *efx, int tx_usecs, int rx_usecs,
1316 bool rx_adaptive)
Ben Hutchings8ceee662008-04-27 12:55:59 +01001317{
1318 struct efx_tx_queue *tx_queue;
1319 struct efx_rx_queue *rx_queue;
Ben Hutchings152b6a62009-11-29 03:43:56 +00001320 unsigned tx_ticks = irq_mod_ticks(tx_usecs, EFX_IRQ_MOD_RESOLUTION);
1321 unsigned rx_ticks = irq_mod_ticks(rx_usecs, EFX_IRQ_MOD_RESOLUTION);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001322
1323 EFX_ASSERT_RESET_SERIALISED(efx);
1324
1325 efx_for_each_tx_queue(tx_queue, efx)
Ben Hutchings0d86ebd2009-10-23 08:32:13 +00001326 tx_queue->channel->irq_moderation = tx_ticks;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001327
Ben Hutchings6fb70fd2009-03-20 13:30:37 +00001328 efx->irq_rx_adaptive = rx_adaptive;
Ben Hutchings0d86ebd2009-10-23 08:32:13 +00001329 efx->irq_rx_moderation = rx_ticks;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001330 efx_for_each_rx_queue(rx_queue, efx)
Ben Hutchings0d86ebd2009-10-23 08:32:13 +00001331 rx_queue->channel->irq_moderation = rx_ticks;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001332}
1333
1334/**************************************************************************
1335 *
1336 * Hardware monitor
1337 *
1338 **************************************************************************/
1339
1340/* Run periodically off the general workqueue. Serialised against
1341 * efx_reconfigure_port via the mac_lock */
1342static void efx_monitor(struct work_struct *data)
1343{
1344 struct efx_nic *efx = container_of(data, struct efx_nic,
1345 monitor_work.work);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001346
1347 EFX_TRACE(efx, "hardware monitor executing on CPU %d\n",
1348 raw_smp_processor_id());
Ben Hutchingsef2b90e2009-11-29 03:42:31 +00001349 BUG_ON(efx->type->monitor == NULL);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001350
Ben Hutchings8ceee662008-04-27 12:55:59 +01001351 /* If the mac_lock is already held then it is likely a port
1352 * reconfiguration is already in place, which will likely do
1353 * most of the work of check_hw() anyway. */
Ben Hutchings766ca0f2008-12-12 21:59:24 -08001354 if (!mutex_trylock(&efx->mac_lock))
1355 goto out_requeue;
1356 if (!efx->port_enabled)
1357 goto out_unlock;
Ben Hutchingsef2b90e2009-11-29 03:42:31 +00001358 efx->type->monitor(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001359
Ben Hutchings766ca0f2008-12-12 21:59:24 -08001360out_unlock:
Ben Hutchings8ceee662008-04-27 12:55:59 +01001361 mutex_unlock(&efx->mac_lock);
Ben Hutchings766ca0f2008-12-12 21:59:24 -08001362out_requeue:
Ben Hutchings8ceee662008-04-27 12:55:59 +01001363 queue_delayed_work(efx->workqueue, &efx->monitor_work,
1364 efx_monitor_interval);
1365}
1366
1367/**************************************************************************
1368 *
1369 * ioctls
1370 *
1371 *************************************************************************/
1372
1373/* Net device ioctl
1374 * Context: process, rtnl_lock() held.
1375 */
1376static int efx_ioctl(struct net_device *net_dev, struct ifreq *ifr, int cmd)
1377{
Ben Hutchings767e4682008-09-01 12:43:14 +01001378 struct efx_nic *efx = netdev_priv(net_dev);
Ben Hutchings68e7f452009-04-29 08:05:08 +00001379 struct mii_ioctl_data *data = if_mii(ifr);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001380
1381 EFX_ASSERT_RESET_SERIALISED(efx);
1382
Ben Hutchings68e7f452009-04-29 08:05:08 +00001383 /* Convert phy_id from older PRTAD/DEVAD format */
1384 if ((cmd == SIOCGMIIREG || cmd == SIOCSMIIREG) &&
1385 (data->phy_id & 0xfc00) == 0x0400)
1386 data->phy_id ^= MDIO_PHY_ID_C45 | 0x0400;
1387
1388 return mdio_mii_ioctl(&efx->mdio, data, cmd);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001389}
1390
1391/**************************************************************************
1392 *
1393 * NAPI interface
1394 *
1395 **************************************************************************/
1396
1397static int efx_init_napi(struct efx_nic *efx)
1398{
1399 struct efx_channel *channel;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001400
1401 efx_for_each_channel(channel, efx) {
1402 channel->napi_dev = efx->net_dev;
Ben Hutchings718cff12009-04-14 19:47:46 -07001403 netif_napi_add(channel->napi_dev, &channel->napi_str,
1404 efx_poll, napi_weight);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001405 }
1406 return 0;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001407}
1408
1409static void efx_fini_napi(struct efx_nic *efx)
1410{
1411 struct efx_channel *channel;
1412
1413 efx_for_each_channel(channel, efx) {
Ben Hutchings718cff12009-04-14 19:47:46 -07001414 if (channel->napi_dev)
1415 netif_napi_del(&channel->napi_str);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001416 channel->napi_dev = NULL;
1417 }
1418}
1419
1420/**************************************************************************
1421 *
1422 * Kernel netpoll interface
1423 *
1424 *************************************************************************/
1425
1426#ifdef CONFIG_NET_POLL_CONTROLLER
1427
1428/* Although in the common case interrupts will be disabled, this is not
1429 * guaranteed. However, all our work happens inside the NAPI callback,
1430 * so no locking is required.
1431 */
1432static void efx_netpoll(struct net_device *net_dev)
1433{
Ben Hutchings767e4682008-09-01 12:43:14 +01001434 struct efx_nic *efx = netdev_priv(net_dev);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001435 struct efx_channel *channel;
1436
Ben Hutchings64ee3122008-09-01 12:47:38 +01001437 efx_for_each_channel(channel, efx)
Ben Hutchings8ceee662008-04-27 12:55:59 +01001438 efx_schedule_channel(channel);
1439}
1440
1441#endif
1442
1443/**************************************************************************
1444 *
1445 * Kernel net device interface
1446 *
1447 *************************************************************************/
1448
1449/* Context: process, rtnl_lock() held. */
1450static int efx_net_open(struct net_device *net_dev)
1451{
Ben Hutchings767e4682008-09-01 12:43:14 +01001452 struct efx_nic *efx = netdev_priv(net_dev);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001453 EFX_ASSERT_RESET_SERIALISED(efx);
1454
1455 EFX_LOG(efx, "opening device %s on CPU %d\n", net_dev->name,
1456 raw_smp_processor_id());
1457
Ben Hutchingsf4bd9542008-12-26 13:48:51 -08001458 if (efx->state == STATE_DISABLED)
1459 return -EIO;
Ben Hutchingsf8b87c12008-09-01 12:48:17 +01001460 if (efx->phy_mode & PHY_MODE_SPECIAL)
1461 return -EBUSY;
Ben Hutchings8880f4e2009-11-29 15:15:41 +00001462 if (efx_mcdi_poll_reboot(efx) && efx_reset(efx, RESET_TYPE_ALL))
1463 return -EIO;
Ben Hutchingsf8b87c12008-09-01 12:48:17 +01001464
Steve Hodgson78c1f0a2009-11-29 03:43:00 +00001465 /* Notify the kernel of the link state polled during driver load,
1466 * before the monitor starts running */
1467 efx_link_status_changed(efx);
1468
Ben Hutchings8ceee662008-04-27 12:55:59 +01001469 efx_start_all(efx);
1470 return 0;
1471}
1472
1473/* Context: process, rtnl_lock() held.
1474 * Note that the kernel will ignore our return code; this method
1475 * should really be a void.
1476 */
1477static int efx_net_stop(struct net_device *net_dev)
1478{
Ben Hutchings767e4682008-09-01 12:43:14 +01001479 struct efx_nic *efx = netdev_priv(net_dev);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001480
1481 EFX_LOG(efx, "closing %s on CPU %d\n", net_dev->name,
1482 raw_smp_processor_id());
1483
Ben Hutchingsf4bd9542008-12-26 13:48:51 -08001484 if (efx->state != STATE_DISABLED) {
1485 /* Stop the device and flush all the channels */
1486 efx_stop_all(efx);
1487 efx_fini_channels(efx);
1488 efx_init_channels(efx);
1489 }
Ben Hutchings8ceee662008-04-27 12:55:59 +01001490
1491 return 0;
1492}
1493
Ben Hutchings5b9e2072008-05-16 21:18:14 +01001494/* Context: process, dev_base_lock or RTNL held, non-blocking. */
Ben Hutchings44727022010-06-08 07:21:12 +00001495static struct rtnl_link_stats64 *efx_net_stats(struct net_device *net_dev)
Ben Hutchings8ceee662008-04-27 12:55:59 +01001496{
Ben Hutchings767e4682008-09-01 12:43:14 +01001497 struct efx_nic *efx = netdev_priv(net_dev);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001498 struct efx_mac_stats *mac_stats = &efx->mac_stats;
Ben Hutchings44727022010-06-08 07:21:12 +00001499 struct rtnl_link_stats64 *stats = &net_dev->stats64;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001500
Ben Hutchings55edc6e2009-11-25 16:11:35 +00001501 spin_lock_bh(&efx->stats_lock);
Ben Hutchingsef2b90e2009-11-29 03:42:31 +00001502 efx->type->update_stats(efx);
Ben Hutchings55edc6e2009-11-25 16:11:35 +00001503 spin_unlock_bh(&efx->stats_lock);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001504
1505 stats->rx_packets = mac_stats->rx_packets;
1506 stats->tx_packets = mac_stats->tx_packets;
1507 stats->rx_bytes = mac_stats->rx_bytes;
1508 stats->tx_bytes = mac_stats->tx_bytes;
1509 stats->multicast = mac_stats->rx_multicast;
1510 stats->collisions = mac_stats->tx_collision;
1511 stats->rx_length_errors = (mac_stats->rx_gtjumbo +
1512 mac_stats->rx_length_error);
1513 stats->rx_over_errors = efx->n_rx_nodesc_drop_cnt;
1514 stats->rx_crc_errors = mac_stats->rx_bad;
1515 stats->rx_frame_errors = mac_stats->rx_align_error;
1516 stats->rx_fifo_errors = mac_stats->rx_overflow;
1517 stats->rx_missed_errors = mac_stats->rx_missed;
1518 stats->tx_window_errors = mac_stats->tx_late_collision;
1519
1520 stats->rx_errors = (stats->rx_length_errors +
Ben Hutchings8ceee662008-04-27 12:55:59 +01001521 stats->rx_crc_errors +
1522 stats->rx_frame_errors +
Ben Hutchings8ceee662008-04-27 12:55:59 +01001523 mac_stats->rx_symbol_error);
1524 stats->tx_errors = (stats->tx_window_errors +
1525 mac_stats->tx_bad);
1526
1527 return stats;
1528}
1529
1530/* Context: netif_tx_lock held, BHs disabled. */
1531static void efx_watchdog(struct net_device *net_dev)
1532{
Ben Hutchings767e4682008-09-01 12:43:14 +01001533 struct efx_nic *efx = netdev_priv(net_dev);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001534
Ben Hutchingsa4900ac2010-04-28 09:30:43 +00001535 EFX_ERR(efx, "TX stuck with port_enabled=%d: resetting channels\n",
1536 efx->port_enabled);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001537
Ben Hutchings739bb23d2008-11-04 20:35:36 +00001538 efx_schedule_reset(efx, RESET_TYPE_TX_WATCHDOG);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001539}
1540
1541
1542/* Context: process, rtnl_lock() held. */
1543static int efx_change_mtu(struct net_device *net_dev, int new_mtu)
1544{
Ben Hutchings767e4682008-09-01 12:43:14 +01001545 struct efx_nic *efx = netdev_priv(net_dev);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001546 int rc = 0;
1547
1548 EFX_ASSERT_RESET_SERIALISED(efx);
1549
1550 if (new_mtu > EFX_MAX_MTU)
1551 return -EINVAL;
1552
1553 efx_stop_all(efx);
1554
1555 EFX_LOG(efx, "changing MTU to %d\n", new_mtu);
1556
1557 efx_fini_channels(efx);
Ben Hutchingsd3245b22009-11-29 03:42:41 +00001558
1559 mutex_lock(&efx->mac_lock);
1560 /* Reconfigure the MAC before enabling the dma queues so that
1561 * the RX buffers don't overflow */
Ben Hutchings8ceee662008-04-27 12:55:59 +01001562 net_dev->mtu = new_mtu;
Ben Hutchingsd3245b22009-11-29 03:42:41 +00001563 efx->mac_op->reconfigure(efx);
1564 mutex_unlock(&efx->mac_lock);
1565
Ben Hutchingsbc3c90a2008-09-01 12:48:46 +01001566 efx_init_channels(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001567
1568 efx_start_all(efx);
1569 return rc;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001570}
1571
1572static int efx_set_mac_address(struct net_device *net_dev, void *data)
1573{
Ben Hutchings767e4682008-09-01 12:43:14 +01001574 struct efx_nic *efx = netdev_priv(net_dev);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001575 struct sockaddr *addr = data;
1576 char *new_addr = addr->sa_data;
1577
1578 EFX_ASSERT_RESET_SERIALISED(efx);
1579
1580 if (!is_valid_ether_addr(new_addr)) {
Johannes Berge1749612008-10-27 15:59:26 -07001581 EFX_ERR(efx, "invalid ethernet MAC address requested: %pM\n",
1582 new_addr);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001583 return -EINVAL;
1584 }
1585
1586 memcpy(net_dev->dev_addr, new_addr, net_dev->addr_len);
1587
1588 /* Reconfigure the MAC */
Ben Hutchingsd3245b22009-11-29 03:42:41 +00001589 mutex_lock(&efx->mac_lock);
1590 efx->mac_op->reconfigure(efx);
1591 mutex_unlock(&efx->mac_lock);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001592
1593 return 0;
1594}
1595
Ben Hutchingsa816f752008-09-01 12:49:12 +01001596/* Context: netif_addr_lock held, BHs disabled. */
Ben Hutchings8ceee662008-04-27 12:55:59 +01001597static void efx_set_multicast_list(struct net_device *net_dev)
1598{
Ben Hutchings767e4682008-09-01 12:43:14 +01001599 struct efx_nic *efx = netdev_priv(net_dev);
Jiri Pirko22bedad32010-04-01 21:22:57 +00001600 struct netdev_hw_addr *ha;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001601 union efx_multicast_hash *mc_hash = &efx->multicast_hash;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001602 u32 crc;
1603 int bit;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001604
Ben Hutchings8be4f3e2009-11-25 16:12:16 +00001605 efx->promiscuous = !!(net_dev->flags & IFF_PROMISC);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001606
1607 /* Build multicast hash table */
Ben Hutchings8be4f3e2009-11-25 16:12:16 +00001608 if (efx->promiscuous || (net_dev->flags & IFF_ALLMULTI)) {
Ben Hutchings8ceee662008-04-27 12:55:59 +01001609 memset(mc_hash, 0xff, sizeof(*mc_hash));
1610 } else {
1611 memset(mc_hash, 0x00, sizeof(*mc_hash));
Jiri Pirko22bedad32010-04-01 21:22:57 +00001612 netdev_for_each_mc_addr(ha, net_dev) {
1613 crc = ether_crc_le(ETH_ALEN, ha->addr);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001614 bit = crc & (EFX_MCAST_HASH_ENTRIES - 1);
1615 set_bit_le(bit, mc_hash->byte);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001616 }
Ben Hutchings8be4f3e2009-11-25 16:12:16 +00001617
1618 /* Broadcast packets go through the multicast hash filter.
1619 * ether_crc_le() of the broadcast address is 0xbe2612ff
1620 * so we always add bit 0xff to the mask.
1621 */
1622 set_bit_le(0xff, mc_hash->byte);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001623 }
1624
Ben Hutchings8be4f3e2009-11-25 16:12:16 +00001625 if (efx->port_enabled)
1626 queue_work(efx->workqueue, &efx->mac_work);
1627 /* Otherwise efx_start_port() will do this */
Ben Hutchings8ceee662008-04-27 12:55:59 +01001628}
1629
Stephen Hemmingerc3ecb9f2008-11-21 17:32:54 -08001630static const struct net_device_ops efx_netdev_ops = {
1631 .ndo_open = efx_net_open,
1632 .ndo_stop = efx_net_stop,
Ben Hutchings44727022010-06-08 07:21:12 +00001633 .ndo_get_stats64 = efx_net_stats,
Stephen Hemmingerc3ecb9f2008-11-21 17:32:54 -08001634 .ndo_tx_timeout = efx_watchdog,
1635 .ndo_start_xmit = efx_hard_start_xmit,
1636 .ndo_validate_addr = eth_validate_addr,
1637 .ndo_do_ioctl = efx_ioctl,
1638 .ndo_change_mtu = efx_change_mtu,
1639 .ndo_set_mac_address = efx_set_mac_address,
1640 .ndo_set_multicast_list = efx_set_multicast_list,
1641#ifdef CONFIG_NET_POLL_CONTROLLER
1642 .ndo_poll_controller = efx_netpoll,
1643#endif
1644};
1645
Ben Hutchings7dde5962008-12-12 22:09:38 -08001646static void efx_update_name(struct efx_nic *efx)
1647{
1648 strcpy(efx->name, efx->net_dev->name);
1649 efx_mtd_rename(efx);
1650 efx_set_channel_names(efx);
1651}
1652
Ben Hutchings8ceee662008-04-27 12:55:59 +01001653static int efx_netdev_event(struct notifier_block *this,
1654 unsigned long event, void *ptr)
1655{
Ben Hutchingsd3208b52008-05-16 21:20:00 +01001656 struct net_device *net_dev = ptr;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001657
Ben Hutchings7dde5962008-12-12 22:09:38 -08001658 if (net_dev->netdev_ops == &efx_netdev_ops &&
1659 event == NETDEV_CHANGENAME)
1660 efx_update_name(netdev_priv(net_dev));
Ben Hutchings8ceee662008-04-27 12:55:59 +01001661
1662 return NOTIFY_DONE;
1663}
1664
1665static struct notifier_block efx_netdev_notifier = {
1666 .notifier_call = efx_netdev_event,
1667};
1668
Ben Hutchings06d5e192008-12-12 21:47:23 -08001669static ssize_t
1670show_phy_type(struct device *dev, struct device_attribute *attr, char *buf)
1671{
1672 struct efx_nic *efx = pci_get_drvdata(to_pci_dev(dev));
1673 return sprintf(buf, "%d\n", efx->phy_type);
1674}
1675static DEVICE_ATTR(phy_type, 0644, show_phy_type, NULL);
1676
Ben Hutchings8ceee662008-04-27 12:55:59 +01001677static int efx_register_netdev(struct efx_nic *efx)
1678{
1679 struct net_device *net_dev = efx->net_dev;
1680 int rc;
1681
1682 net_dev->watchdog_timeo = 5 * HZ;
1683 net_dev->irq = efx->pci_dev->irq;
Stephen Hemmingerc3ecb9f2008-11-21 17:32:54 -08001684 net_dev->netdev_ops = &efx_netdev_ops;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001685 SET_NETDEV_DEV(net_dev, &efx->pci_dev->dev);
1686 SET_ETHTOOL_OPS(net_dev, &efx_ethtool_ops);
1687
Ben Hutchings8ceee662008-04-27 12:55:59 +01001688 /* Clear MAC statistics */
Ben Hutchings177dfcd2008-12-12 21:50:08 -08001689 efx->mac_op->update_stats(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001690 memset(&efx->mac_stats, 0, sizeof(efx->mac_stats));
1691
Ben Hutchings7dde5962008-12-12 22:09:38 -08001692 rtnl_lock();
Ben Hutchingsaed06282009-08-26 08:16:27 +00001693
1694 rc = dev_alloc_name(net_dev, net_dev->name);
1695 if (rc < 0)
1696 goto fail_locked;
Ben Hutchings7dde5962008-12-12 22:09:38 -08001697 efx_update_name(efx);
Ben Hutchingsaed06282009-08-26 08:16:27 +00001698
1699 rc = register_netdevice(net_dev);
1700 if (rc)
1701 goto fail_locked;
1702
1703 /* Always start with carrier off; PHY events will detect the link */
1704 netif_carrier_off(efx->net_dev);
1705
Ben Hutchings7dde5962008-12-12 22:09:38 -08001706 rtnl_unlock();
Ben Hutchings8ceee662008-04-27 12:55:59 +01001707
Ben Hutchings06d5e192008-12-12 21:47:23 -08001708 rc = device_create_file(&efx->pci_dev->dev, &dev_attr_phy_type);
1709 if (rc) {
1710 EFX_ERR(efx, "failed to init net dev attributes\n");
1711 goto fail_registered;
1712 }
1713
Ben Hutchings8ceee662008-04-27 12:55:59 +01001714 return 0;
Ben Hutchings06d5e192008-12-12 21:47:23 -08001715
Ben Hutchingsaed06282009-08-26 08:16:27 +00001716fail_locked:
1717 rtnl_unlock();
1718 EFX_ERR(efx, "could not register net dev\n");
1719 return rc;
1720
Ben Hutchings06d5e192008-12-12 21:47:23 -08001721fail_registered:
1722 unregister_netdev(net_dev);
1723 return rc;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001724}
1725
1726static void efx_unregister_netdev(struct efx_nic *efx)
1727{
1728 struct efx_tx_queue *tx_queue;
1729
1730 if (!efx->net_dev)
1731 return;
1732
Ben Hutchings767e4682008-09-01 12:43:14 +01001733 BUG_ON(netdev_priv(efx->net_dev) != efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001734
1735 /* Free up any skbs still remaining. This has to happen before
1736 * we try to unregister the netdev as running their destructors
1737 * may be needed to get the device ref. count to 0. */
1738 efx_for_each_tx_queue(tx_queue, efx)
1739 efx_release_tx_buffers(tx_queue);
1740
Ben Hutchings55668612008-05-16 21:16:10 +01001741 if (efx_dev_registered(efx)) {
Ben Hutchings8ceee662008-04-27 12:55:59 +01001742 strlcpy(efx->name, pci_name(efx->pci_dev), sizeof(efx->name));
Ben Hutchings06d5e192008-12-12 21:47:23 -08001743 device_remove_file(&efx->pci_dev->dev, &dev_attr_phy_type);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001744 unregister_netdev(efx->net_dev);
1745 }
1746}
1747
1748/**************************************************************************
1749 *
1750 * Device reset and suspend
1751 *
1752 **************************************************************************/
1753
Ben Hutchings2467ca42008-09-01 12:48:50 +01001754/* Tears down the entire software state and most of the hardware state
1755 * before reset. */
Ben Hutchingsd3245b22009-11-29 03:42:41 +00001756void efx_reset_down(struct efx_nic *efx, enum reset_type method)
Ben Hutchings8ceee662008-04-27 12:55:59 +01001757{
Ben Hutchings8ceee662008-04-27 12:55:59 +01001758 EFX_ASSERT_RESET_SERIALISED(efx);
1759
Ben Hutchings2467ca42008-09-01 12:48:50 +01001760 efx_stop_all(efx);
1761 mutex_lock(&efx->mac_lock);
Ben Hutchingsf4150722008-11-04 20:34:28 +00001762 mutex_lock(&efx->spi_lock);
Ben Hutchings2467ca42008-09-01 12:48:50 +01001763
Ben Hutchings8ceee662008-04-27 12:55:59 +01001764 efx_fini_channels(efx);
Steve Hodgson4b988282009-01-29 17:50:51 +00001765 if (efx->port_initialized && method != RESET_TYPE_INVISIBLE)
1766 efx->phy_op->fini(efx);
Ben Hutchingsef2b90e2009-11-29 03:42:31 +00001767 efx->type->fini(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001768}
1769
Ben Hutchings2467ca42008-09-01 12:48:50 +01001770/* This function will always ensure that the locks acquired in
1771 * efx_reset_down() are released. A failure return code indicates
1772 * that we were unable to reinitialise the hardware, and the
1773 * driver should be disabled. If ok is false, then the rx and tx
1774 * engines are not restarted, pending a RESET_DISABLE. */
Ben Hutchingsd3245b22009-11-29 03:42:41 +00001775int efx_reset_up(struct efx_nic *efx, enum reset_type method, bool ok)
Ben Hutchings8ceee662008-04-27 12:55:59 +01001776{
1777 int rc;
1778
Ben Hutchings2467ca42008-09-01 12:48:50 +01001779 EFX_ASSERT_RESET_SERIALISED(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001780
Ben Hutchingsef2b90e2009-11-29 03:42:31 +00001781 rc = efx->type->init(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001782 if (rc) {
Ben Hutchings2467ca42008-09-01 12:48:50 +01001783 EFX_ERR(efx, "failed to initialise NIC\n");
Ben Hutchingseb9f6742009-11-29 03:43:15 +00001784 goto fail;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001785 }
1786
Ben Hutchingseb9f6742009-11-29 03:43:15 +00001787 if (!ok)
1788 goto fail;
1789
Steve Hodgson4b988282009-01-29 17:50:51 +00001790 if (efx->port_initialized && method != RESET_TYPE_INVISIBLE) {
Ben Hutchingseb9f6742009-11-29 03:43:15 +00001791 rc = efx->phy_op->init(efx);
1792 if (rc)
1793 goto fail;
1794 if (efx->phy_op->reconfigure(efx))
1795 EFX_ERR(efx, "could not restore PHY settings\n");
Steve Hodgson4b988282009-01-29 17:50:51 +00001796 }
1797
Ben Hutchingseb9f6742009-11-29 03:43:15 +00001798 efx->mac_op->reconfigure(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001799
Ben Hutchingseb9f6742009-11-29 03:43:15 +00001800 efx_init_channels(efx);
Ben Hutchings2467ca42008-09-01 12:48:50 +01001801
Ben Hutchingsf4150722008-11-04 20:34:28 +00001802 mutex_unlock(&efx->spi_lock);
Ben Hutchings2467ca42008-09-01 12:48:50 +01001803 mutex_unlock(&efx->mac_lock);
1804
Ben Hutchingseb9f6742009-11-29 03:43:15 +00001805 efx_start_all(efx);
1806
1807 return 0;
1808
1809fail:
1810 efx->port_initialized = false;
1811
1812 mutex_unlock(&efx->spi_lock);
1813 mutex_unlock(&efx->mac_lock);
1814
Ben Hutchings8ceee662008-04-27 12:55:59 +01001815 return rc;
1816}
1817
Ben Hutchingseb9f6742009-11-29 03:43:15 +00001818/* Reset the NIC using the specified method. Note that the reset may
1819 * fail, in which case the card will be left in an unusable state.
Ben Hutchings8ceee662008-04-27 12:55:59 +01001820 *
Ben Hutchingseb9f6742009-11-29 03:43:15 +00001821 * Caller must hold the rtnl_lock.
Ben Hutchings8ceee662008-04-27 12:55:59 +01001822 */
Ben Hutchingseb9f6742009-11-29 03:43:15 +00001823int efx_reset(struct efx_nic *efx, enum reset_type method)
Ben Hutchings8ceee662008-04-27 12:55:59 +01001824{
Ben Hutchingseb9f6742009-11-29 03:43:15 +00001825 int rc, rc2;
1826 bool disabled;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001827
Ben Hutchingsc4593022009-11-23 16:08:17 +00001828 EFX_INFO(efx, "resetting (%s)\n", RESET_TYPE(method));
Ben Hutchings8ceee662008-04-27 12:55:59 +01001829
Ben Hutchingsd3245b22009-11-29 03:42:41 +00001830 efx_reset_down(efx, method);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001831
Ben Hutchingsef2b90e2009-11-29 03:42:31 +00001832 rc = efx->type->reset(efx, method);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001833 if (rc) {
1834 EFX_ERR(efx, "failed to reset hardware\n");
Ben Hutchingseb9f6742009-11-29 03:43:15 +00001835 goto out;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001836 }
1837
1838 /* Allow resets to be rescheduled. */
1839 efx->reset_pending = RESET_TYPE_NONE;
1840
1841 /* Reinitialise bus-mastering, which may have been turned off before
1842 * the reset was scheduled. This is still appropriate, even in the
1843 * RESET_TYPE_DISABLE since this driver generally assumes the hardware
1844 * can respond to requests. */
1845 pci_set_master(efx->pci_dev);
1846
Ben Hutchingseb9f6742009-11-29 03:43:15 +00001847out:
Ben Hutchings8ceee662008-04-27 12:55:59 +01001848 /* Leave device stopped if necessary */
Ben Hutchingseb9f6742009-11-29 03:43:15 +00001849 disabled = rc || method == RESET_TYPE_DISABLE;
1850 rc2 = efx_reset_up(efx, method, !disabled);
1851 if (rc2) {
1852 disabled = true;
1853 if (!rc)
1854 rc = rc2;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001855 }
1856
Ben Hutchingseb9f6742009-11-29 03:43:15 +00001857 if (disabled) {
Ben Hutchingsf49a4582010-04-28 09:01:33 +00001858 dev_close(efx->net_dev);
Ben Hutchingsf4bd9542008-12-26 13:48:51 -08001859 EFX_ERR(efx, "has been disabled\n");
1860 efx->state = STATE_DISABLED;
Ben Hutchingsf4bd9542008-12-26 13:48:51 -08001861 } else {
1862 EFX_LOG(efx, "reset complete\n");
1863 }
Ben Hutchings8ceee662008-04-27 12:55:59 +01001864 return rc;
1865}
1866
1867/* The worker thread exists so that code that cannot sleep can
1868 * schedule a reset for later.
1869 */
1870static void efx_reset_work(struct work_struct *data)
1871{
Ben Hutchingseb9f6742009-11-29 03:43:15 +00001872 struct efx_nic *efx = container_of(data, struct efx_nic, reset_work);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001873
Steve Hodgson319ba642010-06-01 11:17:24 +00001874 if (efx->reset_pending == RESET_TYPE_NONE)
1875 return;
1876
Ben Hutchingseb9f6742009-11-29 03:43:15 +00001877 /* If we're not RUNNING then don't reset. Leave the reset_pending
1878 * flag set so that efx_pci_probe_main will be retried */
1879 if (efx->state != STATE_RUNNING) {
1880 EFX_INFO(efx, "scheduled reset quenched. NIC not RUNNING\n");
1881 return;
1882 }
1883
1884 rtnl_lock();
Ben Hutchingsf49a4582010-04-28 09:01:33 +00001885 (void)efx_reset(efx, efx->reset_pending);
Ben Hutchingseb9f6742009-11-29 03:43:15 +00001886 rtnl_unlock();
Ben Hutchings8ceee662008-04-27 12:55:59 +01001887}
1888
1889void efx_schedule_reset(struct efx_nic *efx, enum reset_type type)
1890{
1891 enum reset_type method;
1892
1893 if (efx->reset_pending != RESET_TYPE_NONE) {
1894 EFX_INFO(efx, "quenching already scheduled reset\n");
1895 return;
1896 }
1897
1898 switch (type) {
1899 case RESET_TYPE_INVISIBLE:
1900 case RESET_TYPE_ALL:
1901 case RESET_TYPE_WORLD:
1902 case RESET_TYPE_DISABLE:
1903 method = type;
1904 break;
1905 case RESET_TYPE_RX_RECOVERY:
1906 case RESET_TYPE_RX_DESC_FETCH:
1907 case RESET_TYPE_TX_DESC_FETCH:
1908 case RESET_TYPE_TX_SKIP:
1909 method = RESET_TYPE_INVISIBLE;
1910 break;
Ben Hutchings8880f4e2009-11-29 15:15:41 +00001911 case RESET_TYPE_MC_FAILURE:
Ben Hutchings8ceee662008-04-27 12:55:59 +01001912 default:
1913 method = RESET_TYPE_ALL;
1914 break;
1915 }
1916
1917 if (method != type)
Ben Hutchingsc4593022009-11-23 16:08:17 +00001918 EFX_LOG(efx, "scheduling %s reset for %s\n",
1919 RESET_TYPE(method), RESET_TYPE(type));
Ben Hutchings8ceee662008-04-27 12:55:59 +01001920 else
Ben Hutchingsc4593022009-11-23 16:08:17 +00001921 EFX_LOG(efx, "scheduling %s reset\n", RESET_TYPE(method));
Ben Hutchings8ceee662008-04-27 12:55:59 +01001922
1923 efx->reset_pending = method;
1924
Ben Hutchings8880f4e2009-11-29 15:15:41 +00001925 /* efx_process_channel() will no longer read events once a
1926 * reset is scheduled. So switch back to poll'd MCDI completions. */
1927 efx_mcdi_mode_poll(efx);
1928
Steve Hodgson1ab00622008-12-12 21:33:02 -08001929 queue_work(reset_workqueue, &efx->reset_work);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001930}
1931
1932/**************************************************************************
1933 *
1934 * List of NICs we support
1935 *
1936 **************************************************************************/
1937
1938/* PCI device ID table */
Alexey Dobriyana3aa1882010-01-07 11:58:11 +00001939static DEFINE_PCI_DEVICE_TABLE(efx_pci_table) = {
Ben Hutchings8ceee662008-04-27 12:55:59 +01001940 {PCI_DEVICE(EFX_VENDID_SFC, FALCON_A_P_DEVID),
Ben Hutchingsdaeda632009-11-28 05:36:04 +00001941 .driver_data = (unsigned long) &falcon_a1_nic_type},
Ben Hutchings8ceee662008-04-27 12:55:59 +01001942 {PCI_DEVICE(EFX_VENDID_SFC, FALCON_B_P_DEVID),
Ben Hutchingsdaeda632009-11-28 05:36:04 +00001943 .driver_data = (unsigned long) &falcon_b0_nic_type},
Ben Hutchings8880f4e2009-11-29 15:15:41 +00001944 {PCI_DEVICE(EFX_VENDID_SFC, BETHPAGE_A_P_DEVID),
1945 .driver_data = (unsigned long) &siena_a0_nic_type},
1946 {PCI_DEVICE(EFX_VENDID_SFC, SIENA_A_P_DEVID),
1947 .driver_data = (unsigned long) &siena_a0_nic_type},
Ben Hutchings8ceee662008-04-27 12:55:59 +01001948 {0} /* end of list */
1949};
1950
1951/**************************************************************************
1952 *
Ben Hutchings37594332009-11-23 16:05:45 +00001953 * Dummy PHY/MAC operations
Ben Hutchings8ceee662008-04-27 12:55:59 +01001954 *
Ben Hutchings01aad7b2008-09-01 12:48:36 +01001955 * Can be used for some unimplemented operations
Ben Hutchings8ceee662008-04-27 12:55:59 +01001956 * Needed so all function pointers are valid and do not have to be tested
1957 * before use
1958 *
1959 **************************************************************************/
1960int efx_port_dummy_op_int(struct efx_nic *efx)
1961{
1962 return 0;
1963}
1964void efx_port_dummy_op_void(struct efx_nic *efx) {}
Ben Hutchings398468e2009-11-23 16:03:45 +00001965void efx_port_dummy_op_set_id_led(struct efx_nic *efx, enum efx_led_mode mode)
1966{
1967}
Steve Hodgsonfdaa9ae2009-11-28 05:34:05 +00001968bool efx_port_dummy_op_poll(struct efx_nic *efx)
1969{
1970 return false;
1971}
Ben Hutchings8ceee662008-04-27 12:55:59 +01001972
1973static struct efx_phy_operations efx_dummy_phy_operations = {
1974 .init = efx_port_dummy_op_int,
Ben Hutchingsd3245b22009-11-29 03:42:41 +00001975 .reconfigure = efx_port_dummy_op_int,
Steve Hodgsonfdaa9ae2009-11-28 05:34:05 +00001976 .poll = efx_port_dummy_op_poll,
Ben Hutchings8ceee662008-04-27 12:55:59 +01001977 .fini = efx_port_dummy_op_void,
Ben Hutchings8ceee662008-04-27 12:55:59 +01001978};
1979
Ben Hutchings8ceee662008-04-27 12:55:59 +01001980/**************************************************************************
1981 *
1982 * Data housekeeping
1983 *
1984 **************************************************************************/
1985
1986/* This zeroes out and then fills in the invariants in a struct
1987 * efx_nic (including all sub-structures).
1988 */
1989static int efx_init_struct(struct efx_nic *efx, struct efx_nic_type *type,
1990 struct pci_dev *pci_dev, struct net_device *net_dev)
1991{
1992 struct efx_channel *channel;
1993 struct efx_tx_queue *tx_queue;
1994 struct efx_rx_queue *rx_queue;
Steve Hodgson1ab00622008-12-12 21:33:02 -08001995 int i;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001996
1997 /* Initialise common structures */
1998 memset(efx, 0, sizeof(*efx));
1999 spin_lock_init(&efx->biu_lock);
Steve Hodgsonab867462009-11-28 05:34:44 +00002000 mutex_init(&efx->mdio_lock);
Ben Hutchingsf4150722008-11-04 20:34:28 +00002001 mutex_init(&efx->spi_lock);
Ben Hutchings76884832009-11-29 15:10:44 +00002002#ifdef CONFIG_SFC_MTD
2003 INIT_LIST_HEAD(&efx->mtd_list);
2004#endif
Ben Hutchings8ceee662008-04-27 12:55:59 +01002005 INIT_WORK(&efx->reset_work, efx_reset_work);
2006 INIT_DELAYED_WORK(&efx->monitor_work, efx_monitor);
2007 efx->pci_dev = pci_dev;
2008 efx->state = STATE_INIT;
2009 efx->reset_pending = RESET_TYPE_NONE;
2010 strlcpy(efx->name, pci_name(pci_dev), sizeof(efx->name));
Ben Hutchings8ceee662008-04-27 12:55:59 +01002011
2012 efx->net_dev = net_dev;
Ben Hutchingsdc8cfa52008-09-01 12:46:50 +01002013 efx->rx_checksum_enabled = true;
Ben Hutchings8ceee662008-04-27 12:55:59 +01002014 spin_lock_init(&efx->stats_lock);
2015 mutex_init(&efx->mac_lock);
Steve Hodgsonb895d732009-11-28 05:35:00 +00002016 efx->mac_op = type->default_mac_ops;
Ben Hutchings8ceee662008-04-27 12:55:59 +01002017 efx->phy_op = &efx_dummy_phy_operations;
Ben Hutchings68e7f452009-04-29 08:05:08 +00002018 efx->mdio.dev = net_dev;
Ben Hutchings766ca0f2008-12-12 21:59:24 -08002019 INIT_WORK(&efx->mac_work, efx_mac_work);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002020
2021 for (i = 0; i < EFX_MAX_CHANNELS; i++) {
2022 channel = &efx->channel[i];
2023 channel->efx = efx;
2024 channel->channel = i;
Ben Hutchingsdc8cfa52008-09-01 12:46:50 +01002025 channel->work_pending = false;
Ben Hutchingsa4900ac2010-04-28 09:30:43 +00002026 spin_lock_init(&channel->tx_stop_lock);
2027 atomic_set(&channel->tx_stop_count, 1);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002028 }
Ben Hutchingsa4900ac2010-04-28 09:30:43 +00002029 for (i = 0; i < EFX_MAX_TX_QUEUES; i++) {
Ben Hutchings8ceee662008-04-27 12:55:59 +01002030 tx_queue = &efx->tx_queue[i];
2031 tx_queue->efx = efx;
2032 tx_queue->queue = i;
2033 tx_queue->buffer = NULL;
2034 tx_queue->channel = &efx->channel[0]; /* for safety */
Ben Hutchingsb9b39b62008-05-07 12:51:12 +01002035 tx_queue->tso_headers_free = NULL;
Ben Hutchings8ceee662008-04-27 12:55:59 +01002036 }
2037 for (i = 0; i < EFX_MAX_RX_QUEUES; i++) {
2038 rx_queue = &efx->rx_queue[i];
2039 rx_queue->efx = efx;
2040 rx_queue->queue = i;
2041 rx_queue->channel = &efx->channel[0]; /* for safety */
2042 rx_queue->buffer = NULL;
Steve Hodgson90d683a2010-06-01 11:19:39 +00002043 setup_timer(&rx_queue->slow_fill, efx_rx_slow_fill,
2044 (unsigned long)rx_queue);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002045 }
2046
2047 efx->type = type;
2048
Ben Hutchings8ceee662008-04-27 12:55:59 +01002049 /* As close as we can get to guaranteeing that we don't overflow */
Ben Hutchings3ffeabd2009-10-23 08:30:58 +00002050 BUILD_BUG_ON(EFX_EVQ_SIZE < EFX_TXQ_SIZE + EFX_RXQ_SIZE);
2051
Ben Hutchings8ceee662008-04-27 12:55:59 +01002052 EFX_BUG_ON_PARANOID(efx->type->phys_addr_channels > EFX_MAX_CHANNELS);
2053
2054 /* Higher numbered interrupt modes are less capable! */
2055 efx->interrupt_mode = max(efx->type->max_interrupt_mode,
2056 interrupt_mode);
2057
Ben Hutchings6977dc62008-12-26 13:44:39 -08002058 /* Would be good to use the net_dev name, but we're too early */
2059 snprintf(efx->workqueue_name, sizeof(efx->workqueue_name), "sfc%s",
2060 pci_name(pci_dev));
2061 efx->workqueue = create_singlethread_workqueue(efx->workqueue_name);
Steve Hodgson1ab00622008-12-12 21:33:02 -08002062 if (!efx->workqueue)
2063 return -ENOMEM;
Ben Hutchings8d9853d2008-07-18 19:01:20 +01002064
Ben Hutchings8ceee662008-04-27 12:55:59 +01002065 return 0;
Ben Hutchings8ceee662008-04-27 12:55:59 +01002066}
2067
2068static void efx_fini_struct(struct efx_nic *efx)
2069{
2070 if (efx->workqueue) {
2071 destroy_workqueue(efx->workqueue);
2072 efx->workqueue = NULL;
2073 }
2074}
2075
2076/**************************************************************************
2077 *
2078 * PCI interface
2079 *
2080 **************************************************************************/
2081
2082/* Main body of final NIC shutdown code
2083 * This is called only at module unload (or hotplug removal).
2084 */
2085static void efx_pci_remove_main(struct efx_nic *efx)
2086{
Ben Hutchings152b6a62009-11-29 03:43:56 +00002087 efx_nic_fini_interrupt(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002088 efx_fini_channels(efx);
2089 efx_fini_port(efx);
Ben Hutchingsef2b90e2009-11-29 03:42:31 +00002090 efx->type->fini(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002091 efx_fini_napi(efx);
2092 efx_remove_all(efx);
2093}
2094
2095/* Final NIC shutdown
2096 * This is called only at module unload (or hotplug removal).
2097 */
2098static void efx_pci_remove(struct pci_dev *pci_dev)
2099{
2100 struct efx_nic *efx;
2101
2102 efx = pci_get_drvdata(pci_dev);
2103 if (!efx)
2104 return;
2105
2106 /* Mark the NIC as fini, then stop the interface */
2107 rtnl_lock();
2108 efx->state = STATE_FINI;
2109 dev_close(efx->net_dev);
2110
2111 /* Allow any queued efx_resets() to complete */
2112 rtnl_unlock();
2113
Ben Hutchings8ceee662008-04-27 12:55:59 +01002114 efx_unregister_netdev(efx);
2115
Ben Hutchings7dde5962008-12-12 22:09:38 -08002116 efx_mtd_remove(efx);
2117
Ben Hutchings8ceee662008-04-27 12:55:59 +01002118 /* Wait for any scheduled resets to complete. No more will be
2119 * scheduled from this point because efx_stop_all() has been
2120 * called, we are no longer registered with driverlink, and
2121 * the net_device's have been removed. */
Steve Hodgson1ab00622008-12-12 21:33:02 -08002122 cancel_work_sync(&efx->reset_work);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002123
2124 efx_pci_remove_main(efx);
2125
Ben Hutchings8ceee662008-04-27 12:55:59 +01002126 efx_fini_io(efx);
2127 EFX_LOG(efx, "shutdown successful\n");
2128
2129 pci_set_drvdata(pci_dev, NULL);
2130 efx_fini_struct(efx);
2131 free_netdev(efx->net_dev);
2132};
2133
2134/* Main body of NIC initialisation
2135 * This is called at module load (or hotplug insertion, theoretically).
2136 */
2137static int efx_pci_probe_main(struct efx_nic *efx)
2138{
2139 int rc;
2140
2141 /* Do start-of-day initialisation */
2142 rc = efx_probe_all(efx);
2143 if (rc)
2144 goto fail1;
2145
2146 rc = efx_init_napi(efx);
2147 if (rc)
2148 goto fail2;
2149
Ben Hutchingsef2b90e2009-11-29 03:42:31 +00002150 rc = efx->type->init(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002151 if (rc) {
2152 EFX_ERR(efx, "failed to initialise NIC\n");
Ben Hutchings278c0622009-11-23 16:05:12 +00002153 goto fail3;
Ben Hutchings8ceee662008-04-27 12:55:59 +01002154 }
2155
2156 rc = efx_init_port(efx);
2157 if (rc) {
2158 EFX_ERR(efx, "failed to initialise port\n");
Ben Hutchings278c0622009-11-23 16:05:12 +00002159 goto fail4;
Ben Hutchings8ceee662008-04-27 12:55:59 +01002160 }
2161
Ben Hutchingsbc3c90a2008-09-01 12:48:46 +01002162 efx_init_channels(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002163
Ben Hutchings152b6a62009-11-29 03:43:56 +00002164 rc = efx_nic_init_interrupt(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002165 if (rc)
Ben Hutchings278c0622009-11-23 16:05:12 +00002166 goto fail5;
Ben Hutchings8ceee662008-04-27 12:55:59 +01002167
2168 return 0;
2169
Ben Hutchings278c0622009-11-23 16:05:12 +00002170 fail5:
Ben Hutchingsbc3c90a2008-09-01 12:48:46 +01002171 efx_fini_channels(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002172 efx_fini_port(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002173 fail4:
Ben Hutchingsef2b90e2009-11-29 03:42:31 +00002174 efx->type->fini(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002175 fail3:
2176 efx_fini_napi(efx);
2177 fail2:
2178 efx_remove_all(efx);
2179 fail1:
2180 return rc;
2181}
2182
2183/* NIC initialisation
2184 *
2185 * This is called at module load (or hotplug insertion,
2186 * theoretically). It sets up PCI mappings, tests and resets the NIC,
2187 * sets up and registers the network devices with the kernel and hooks
2188 * the interrupt service routine. It does not prepare the device for
2189 * transmission; this is left to the first time one of the network
2190 * interfaces is brought up (i.e. efx_net_open).
2191 */
2192static int __devinit efx_pci_probe(struct pci_dev *pci_dev,
2193 const struct pci_device_id *entry)
2194{
2195 struct efx_nic_type *type = (struct efx_nic_type *) entry->driver_data;
2196 struct net_device *net_dev;
2197 struct efx_nic *efx;
2198 int i, rc;
2199
2200 /* Allocate and initialise a struct net_device and struct efx_nic */
Ben Hutchingsa4900ac2010-04-28 09:30:43 +00002201 net_dev = alloc_etherdev_mq(sizeof(*efx), EFX_MAX_CORE_TX_QUEUES);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002202 if (!net_dev)
2203 return -ENOMEM;
Ben Hutchingsc383b532009-11-29 15:11:02 +00002204 net_dev->features |= (type->offload_features | NETIF_F_SG |
Ben Hutchings97bc5412009-05-19 16:19:08 -07002205 NETIF_F_HIGHDMA | NETIF_F_TSO |
2206 NETIF_F_GRO);
Ben Hutchings738a8f42009-11-29 15:16:05 +00002207 if (type->offload_features & NETIF_F_V6_CSUM)
2208 net_dev->features |= NETIF_F_TSO6;
Ben Hutchings285065632008-09-01 12:46:54 +01002209 /* Mask for features that also apply to VLAN devices */
2210 net_dev->vlan_features |= (NETIF_F_ALL_CSUM | NETIF_F_SG |
Ben Hutchings740847d2008-09-01 12:48:23 +01002211 NETIF_F_HIGHDMA | NETIF_F_TSO);
Ben Hutchings767e4682008-09-01 12:43:14 +01002212 efx = netdev_priv(net_dev);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002213 pci_set_drvdata(pci_dev, efx);
2214 rc = efx_init_struct(efx, type, pci_dev, net_dev);
2215 if (rc)
2216 goto fail1;
2217
2218 EFX_INFO(efx, "Solarflare Communications NIC detected\n");
2219
2220 /* Set up basic I/O (BAR mappings etc) */
2221 rc = efx_init_io(efx);
2222 if (rc)
2223 goto fail2;
2224
2225 /* No serialisation is required with the reset path because
2226 * we're in STATE_INIT. */
2227 for (i = 0; i < 5; i++) {
2228 rc = efx_pci_probe_main(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002229
2230 /* Serialise against efx_reset(). No more resets will be
2231 * scheduled since efx_stop_all() has been called, and we
2232 * have not and never have been registered with either
2233 * the rtnetlink or driverlink layers. */
Steve Hodgson1ab00622008-12-12 21:33:02 -08002234 cancel_work_sync(&efx->reset_work);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002235
Steve Hodgsonfa402b22008-12-12 22:08:16 -08002236 if (rc == 0) {
2237 if (efx->reset_pending != RESET_TYPE_NONE) {
2238 /* If there was a scheduled reset during
2239 * probe, the NIC is probably hosed anyway */
2240 efx_pci_remove_main(efx);
2241 rc = -EIO;
2242 } else {
2243 break;
2244 }
2245 }
2246
Ben Hutchings8ceee662008-04-27 12:55:59 +01002247 /* Retry if a recoverably reset event has been scheduled */
2248 if ((efx->reset_pending != RESET_TYPE_INVISIBLE) &&
2249 (efx->reset_pending != RESET_TYPE_ALL))
2250 goto fail3;
2251
2252 efx->reset_pending = RESET_TYPE_NONE;
2253 }
2254
2255 if (rc) {
2256 EFX_ERR(efx, "Could not reset NIC\n");
2257 goto fail4;
2258 }
2259
Ben Hutchings55edc6e2009-11-25 16:11:35 +00002260 /* Switch to the running state before we expose the device to the OS,
2261 * so that dev_open()|efx_start_all() will actually start the device */
Ben Hutchings8ceee662008-04-27 12:55:59 +01002262 efx->state = STATE_RUNNING;
Ben Hutchings7dde5962008-12-12 22:09:38 -08002263
Ben Hutchings8ceee662008-04-27 12:55:59 +01002264 rc = efx_register_netdev(efx);
2265 if (rc)
2266 goto fail5;
2267
2268 EFX_LOG(efx, "initialisation successful\n");
Ben Hutchingsa5211bb2009-10-23 08:33:09 +00002269
2270 rtnl_lock();
2271 efx_mtd_probe(efx); /* allowed to fail */
2272 rtnl_unlock();
Ben Hutchings8ceee662008-04-27 12:55:59 +01002273 return 0;
2274
2275 fail5:
2276 efx_pci_remove_main(efx);
2277 fail4:
2278 fail3:
2279 efx_fini_io(efx);
2280 fail2:
2281 efx_fini_struct(efx);
2282 fail1:
Steve Hodgson5e2a9112010-02-12 12:32:27 -08002283 WARN_ON(rc > 0);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002284 EFX_LOG(efx, "initialisation failed. rc=%d\n", rc);
2285 free_netdev(net_dev);
2286 return rc;
2287}
2288
Ben Hutchings89c758f2009-11-29 03:43:07 +00002289static int efx_pm_freeze(struct device *dev)
2290{
2291 struct efx_nic *efx = pci_get_drvdata(to_pci_dev(dev));
2292
2293 efx->state = STATE_FINI;
2294
2295 netif_device_detach(efx->net_dev);
2296
2297 efx_stop_all(efx);
2298 efx_fini_channels(efx);
2299
2300 return 0;
2301}
2302
2303static int efx_pm_thaw(struct device *dev)
2304{
2305 struct efx_nic *efx = pci_get_drvdata(to_pci_dev(dev));
2306
2307 efx->state = STATE_INIT;
2308
2309 efx_init_channels(efx);
2310
2311 mutex_lock(&efx->mac_lock);
2312 efx->phy_op->reconfigure(efx);
2313 mutex_unlock(&efx->mac_lock);
2314
2315 efx_start_all(efx);
2316
2317 netif_device_attach(efx->net_dev);
2318
2319 efx->state = STATE_RUNNING;
2320
2321 efx->type->resume_wol(efx);
2322
Steve Hodgson319ba642010-06-01 11:17:24 +00002323 /* Reschedule any quenched resets scheduled during efx_pm_freeze() */
2324 queue_work(reset_workqueue, &efx->reset_work);
2325
Ben Hutchings89c758f2009-11-29 03:43:07 +00002326 return 0;
2327}
2328
2329static int efx_pm_poweroff(struct device *dev)
2330{
2331 struct pci_dev *pci_dev = to_pci_dev(dev);
2332 struct efx_nic *efx = pci_get_drvdata(pci_dev);
2333
2334 efx->type->fini(efx);
2335
2336 efx->reset_pending = RESET_TYPE_NONE;
2337
2338 pci_save_state(pci_dev);
2339 return pci_set_power_state(pci_dev, PCI_D3hot);
2340}
2341
2342/* Used for both resume and restore */
2343static int efx_pm_resume(struct device *dev)
2344{
2345 struct pci_dev *pci_dev = to_pci_dev(dev);
2346 struct efx_nic *efx = pci_get_drvdata(pci_dev);
2347 int rc;
2348
2349 rc = pci_set_power_state(pci_dev, PCI_D0);
2350 if (rc)
2351 return rc;
2352 pci_restore_state(pci_dev);
2353 rc = pci_enable_device(pci_dev);
2354 if (rc)
2355 return rc;
2356 pci_set_master(efx->pci_dev);
2357 rc = efx->type->reset(efx, RESET_TYPE_ALL);
2358 if (rc)
2359 return rc;
2360 rc = efx->type->init(efx);
2361 if (rc)
2362 return rc;
2363 efx_pm_thaw(dev);
2364 return 0;
2365}
2366
2367static int efx_pm_suspend(struct device *dev)
2368{
2369 int rc;
2370
2371 efx_pm_freeze(dev);
2372 rc = efx_pm_poweroff(dev);
2373 if (rc)
2374 efx_pm_resume(dev);
2375 return rc;
2376}
2377
2378static struct dev_pm_ops efx_pm_ops = {
2379 .suspend = efx_pm_suspend,
2380 .resume = efx_pm_resume,
2381 .freeze = efx_pm_freeze,
2382 .thaw = efx_pm_thaw,
2383 .poweroff = efx_pm_poweroff,
2384 .restore = efx_pm_resume,
2385};
2386
Ben Hutchings8ceee662008-04-27 12:55:59 +01002387static struct pci_driver efx_pci_driver = {
2388 .name = EFX_DRIVER_NAME,
2389 .id_table = efx_pci_table,
2390 .probe = efx_pci_probe,
2391 .remove = efx_pci_remove,
Ben Hutchings89c758f2009-11-29 03:43:07 +00002392 .driver.pm = &efx_pm_ops,
Ben Hutchings8ceee662008-04-27 12:55:59 +01002393};
2394
2395/**************************************************************************
2396 *
2397 * Kernel module interface
2398 *
2399 *************************************************************************/
2400
2401module_param(interrupt_mode, uint, 0444);
2402MODULE_PARM_DESC(interrupt_mode,
2403 "Interrupt mode (0=>MSIX 1=>MSI 2=>legacy)");
2404
2405static int __init efx_init_module(void)
2406{
2407 int rc;
2408
2409 printk(KERN_INFO "Solarflare NET driver v" EFX_DRIVER_VERSION "\n");
2410
2411 rc = register_netdevice_notifier(&efx_netdev_notifier);
2412 if (rc)
2413 goto err_notifier;
2414
Steve Hodgson1ab00622008-12-12 21:33:02 -08002415 reset_workqueue = create_singlethread_workqueue("sfc_reset");
2416 if (!reset_workqueue) {
2417 rc = -ENOMEM;
2418 goto err_reset;
2419 }
Ben Hutchings8ceee662008-04-27 12:55:59 +01002420
2421 rc = pci_register_driver(&efx_pci_driver);
2422 if (rc < 0)
2423 goto err_pci;
2424
2425 return 0;
2426
2427 err_pci:
Steve Hodgson1ab00622008-12-12 21:33:02 -08002428 destroy_workqueue(reset_workqueue);
2429 err_reset:
Ben Hutchings8ceee662008-04-27 12:55:59 +01002430 unregister_netdevice_notifier(&efx_netdev_notifier);
2431 err_notifier:
2432 return rc;
2433}
2434
2435static void __exit efx_exit_module(void)
2436{
2437 printk(KERN_INFO "Solarflare NET driver unloading\n");
2438
2439 pci_unregister_driver(&efx_pci_driver);
Steve Hodgson1ab00622008-12-12 21:33:02 -08002440 destroy_workqueue(reset_workqueue);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002441 unregister_netdevice_notifier(&efx_netdev_notifier);
2442
2443}
2444
2445module_init(efx_init_module);
2446module_exit(efx_exit_module);
2447
Ben Hutchings906bb262009-11-29 15:16:19 +00002448MODULE_AUTHOR("Solarflare Communications and "
2449 "Michael Brown <mbrown@fensystems.co.uk>");
Ben Hutchings8ceee662008-04-27 12:55:59 +01002450MODULE_DESCRIPTION("Solarflare Communications network driver");
2451MODULE_LICENSE("GPL");
2452MODULE_DEVICE_TABLE(pci, efx_pci_table);