blob: d68f061a25e9fdd78d519b63276d51d9d22f6e7a [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 Hutchings62776d02010-06-23 11:30:07 +0000192static unsigned debug = (NETIF_MSG_DRV | NETIF_MSG_PROBE |
193 NETIF_MSG_LINK | NETIF_MSG_IFDOWN |
194 NETIF_MSG_IFUP | NETIF_MSG_RX_ERR |
195 NETIF_MSG_TX_ERR | NETIF_MSG_HW);
196module_param(debug, uint, 0);
197MODULE_PARM_DESC(debug, "Bitmapped debugging message enable value");
198
Ben Hutchings8ceee662008-04-27 12:55:59 +0100199/**************************************************************************
200 *
201 * Utility functions and prototypes
202 *
203 *************************************************************************/
204static void efx_remove_channel(struct efx_channel *channel);
205static void efx_remove_port(struct efx_nic *efx);
206static void efx_fini_napi(struct efx_nic *efx);
207static void efx_fini_channels(struct efx_nic *efx);
208
209#define EFX_ASSERT_RESET_SERIALISED(efx) \
210 do { \
Ben Hutchings332c1ce2009-11-25 16:08:52 +0000211 if ((efx->state == STATE_RUNNING) || \
212 (efx->state == STATE_DISABLED)) \
Ben Hutchings8ceee662008-04-27 12:55:59 +0100213 ASSERT_RTNL(); \
214 } while (0)
215
216/**************************************************************************
217 *
218 * Event queue processing
219 *
220 *************************************************************************/
221
222/* Process channel's event queue
223 *
224 * This function is responsible for processing the event queue of a
225 * single channel. The caller must guarantee that this function will
226 * never be concurrently called more than once on the same channel,
227 * though different channels may be being processed concurrently.
228 */
Ben Hutchingsfa236e12010-04-28 09:29:42 +0000229static int efx_process_channel(struct efx_channel *channel, int budget)
Ben Hutchings8ceee662008-04-27 12:55:59 +0100230{
Ben Hutchings42cbe2d2008-09-01 12:48:08 +0100231 struct efx_nic *efx = channel->efx;
Ben Hutchingsfa236e12010-04-28 09:29:42 +0000232 int spent;
Ben Hutchings8ceee662008-04-27 12:55:59 +0100233
Ben Hutchings42cbe2d2008-09-01 12:48:08 +0100234 if (unlikely(efx->reset_pending != RESET_TYPE_NONE ||
Ben Hutchings8ceee662008-04-27 12:55:59 +0100235 !channel->enabled))
Ben Hutchings42cbe2d2008-09-01 12:48:08 +0100236 return 0;
Ben Hutchings8ceee662008-04-27 12:55:59 +0100237
Ben Hutchingsfa236e12010-04-28 09:29:42 +0000238 spent = efx_nic_process_eventq(channel, budget);
239 if (spent == 0)
Ben Hutchings42cbe2d2008-09-01 12:48:08 +0100240 return 0;
Ben Hutchings8ceee662008-04-27 12:55:59 +0100241
242 /* Deliver last RX packet. */
243 if (channel->rx_pkt) {
244 __efx_rx_packet(channel, channel->rx_pkt,
245 channel->rx_pkt_csummed);
246 channel->rx_pkt = NULL;
247 }
248
Ben Hutchings8ceee662008-04-27 12:55:59 +0100249 efx_rx_strategy(channel);
250
Ben Hutchings42cbe2d2008-09-01 12:48:08 +0100251 efx_fast_push_rx_descriptors(&efx->rx_queue[channel->channel]);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100252
Ben Hutchingsfa236e12010-04-28 09:29:42 +0000253 return spent;
Ben Hutchings8ceee662008-04-27 12:55:59 +0100254}
255
256/* Mark channel as finished processing
257 *
258 * Note that since we will not receive further interrupts for this
259 * channel before we finish processing and call the eventq_read_ack()
260 * method, there is no need to use the interrupt hold-off timers.
261 */
262static inline void efx_channel_processed(struct efx_channel *channel)
263{
Ben Hutchings5b9e2072008-05-16 21:18:14 +0100264 /* The interrupt handler for this channel may set work_pending
265 * as soon as we acknowledge the events we've seen. Make sure
266 * it's cleared before then. */
Ben Hutchingsdc8cfa52008-09-01 12:46:50 +0100267 channel->work_pending = false;
Ben Hutchings5b9e2072008-05-16 21:18:14 +0100268 smp_wmb();
269
Ben Hutchings152b6a62009-11-29 03:43:56 +0000270 efx_nic_eventq_read_ack(channel);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100271}
272
273/* NAPI poll handler
274 *
275 * NAPI guarantees serialisation of polls of the same device, which
276 * provides the guarantee required by efx_process_channel().
277 */
278static int efx_poll(struct napi_struct *napi, int budget)
279{
280 struct efx_channel *channel =
281 container_of(napi, struct efx_channel, napi_str);
Ben Hutchings62776d02010-06-23 11:30:07 +0000282 struct efx_nic *efx = channel->efx;
Ben Hutchingsfa236e12010-04-28 09:29:42 +0000283 int spent;
Ben Hutchings8ceee662008-04-27 12:55:59 +0100284
Ben Hutchings62776d02010-06-23 11:30:07 +0000285 netif_vdbg(efx, intr, efx->net_dev,
286 "channel %d NAPI poll executing on CPU %d\n",
287 channel->channel, raw_smp_processor_id());
Ben Hutchings8ceee662008-04-27 12:55:59 +0100288
Ben Hutchingsfa236e12010-04-28 09:29:42 +0000289 spent = efx_process_channel(channel, budget);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100290
Ben Hutchingsfa236e12010-04-28 09:29:42 +0000291 if (spent < budget) {
Ben Hutchingsa4900ac2010-04-28 09:30:43 +0000292 if (channel->channel < efx->n_rx_channels &&
Ben Hutchings6fb70fd2009-03-20 13:30:37 +0000293 efx->irq_rx_adaptive &&
294 unlikely(++channel->irq_count == 1000)) {
Ben Hutchings6fb70fd2009-03-20 13:30:37 +0000295 if (unlikely(channel->irq_mod_score <
296 irq_adapt_low_thresh)) {
Ben Hutchings0d86ebd2009-10-23 08:32:13 +0000297 if (channel->irq_moderation > 1) {
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 } else if (unlikely(channel->irq_mod_score >
302 irq_adapt_high_thresh)) {
Ben Hutchings0d86ebd2009-10-23 08:32:13 +0000303 if (channel->irq_moderation <
304 efx->irq_rx_moderation) {
305 channel->irq_moderation += 1;
Ben Hutchingsef2b90e2009-11-29 03:42:31 +0000306 efx->type->push_irq_moderation(channel);
Ben Hutchings0d86ebd2009-10-23 08:32:13 +0000307 }
Ben Hutchings6fb70fd2009-03-20 13:30:37 +0000308 }
Ben Hutchings6fb70fd2009-03-20 13:30:37 +0000309 channel->irq_count = 0;
310 channel->irq_mod_score = 0;
311 }
312
Ben Hutchings8ceee662008-04-27 12:55:59 +0100313 /* There is no race here; although napi_disable() will
Ben Hutchings288379f2009-01-19 16:43:59 -0800314 * only wait for napi_complete(), this isn't a problem
Ben Hutchings8ceee662008-04-27 12:55:59 +0100315 * since efx_channel_processed() will have no effect if
316 * interrupts have already been disabled.
317 */
Ben Hutchings288379f2009-01-19 16:43:59 -0800318 napi_complete(napi);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100319 efx_channel_processed(channel);
320 }
321
Ben Hutchingsfa236e12010-04-28 09:29:42 +0000322 return spent;
Ben Hutchings8ceee662008-04-27 12:55:59 +0100323}
324
325/* Process the eventq of the specified channel immediately on this CPU
326 *
327 * Disable hardware generated interrupts, wait for any existing
328 * processing to finish, then directly poll (and ack ) the eventq.
329 * Finally reenable NAPI and interrupts.
330 *
331 * Since we are touching interrupts the caller should hold the suspend lock
332 */
333void efx_process_channel_now(struct efx_channel *channel)
334{
335 struct efx_nic *efx = channel->efx;
336
Ben Hutchings8ceee662008-04-27 12:55:59 +0100337 BUG_ON(!channel->enabled);
338
339 /* Disable interrupts and wait for ISRs to complete */
Ben Hutchings152b6a62009-11-29 03:43:56 +0000340 efx_nic_disable_interrupts(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100341 if (efx->legacy_irq)
342 synchronize_irq(efx->legacy_irq);
Ben Hutchings64ee3122008-09-01 12:47:38 +0100343 if (channel->irq)
Ben Hutchings8ceee662008-04-27 12:55:59 +0100344 synchronize_irq(channel->irq);
345
346 /* Wait for any NAPI processing to complete */
347 napi_disable(&channel->napi_str);
348
349 /* Poll the channel */
Ben Hutchings3ffeabd2009-10-23 08:30:58 +0000350 efx_process_channel(channel, EFX_EVQ_SIZE);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100351
352 /* Ack the eventq. This may cause an interrupt to be generated
353 * when they are reenabled */
354 efx_channel_processed(channel);
355
356 napi_enable(&channel->napi_str);
Ben Hutchings152b6a62009-11-29 03:43:56 +0000357 efx_nic_enable_interrupts(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100358}
359
360/* Create event queue
361 * Event queue memory allocations are done only once. If the channel
362 * is reset, the memory buffer will be reused; this guards against
363 * errors during channel reset and also simplifies interrupt handling.
364 */
365static int efx_probe_eventq(struct efx_channel *channel)
366{
Ben Hutchings62776d02010-06-23 11:30:07 +0000367 netif_dbg(channel->efx, probe, channel->efx->net_dev,
368 "chan %d create event queue\n", channel->channel);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100369
Ben Hutchings152b6a62009-11-29 03:43:56 +0000370 return efx_nic_probe_eventq(channel);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100371}
372
373/* Prepare channel's event queue */
Ben Hutchingsbc3c90a2008-09-01 12:48:46 +0100374static void efx_init_eventq(struct efx_channel *channel)
Ben Hutchings8ceee662008-04-27 12:55:59 +0100375{
Ben Hutchings62776d02010-06-23 11:30:07 +0000376 netif_dbg(channel->efx, drv, channel->efx->net_dev,
377 "chan %d init event queue\n", channel->channel);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100378
379 channel->eventq_read_ptr = 0;
380
Ben Hutchings152b6a62009-11-29 03:43:56 +0000381 efx_nic_init_eventq(channel);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100382}
383
384static void efx_fini_eventq(struct efx_channel *channel)
385{
Ben Hutchings62776d02010-06-23 11:30:07 +0000386 netif_dbg(channel->efx, drv, channel->efx->net_dev,
387 "chan %d fini event queue\n", channel->channel);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100388
Ben Hutchings152b6a62009-11-29 03:43:56 +0000389 efx_nic_fini_eventq(channel);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100390}
391
392static void efx_remove_eventq(struct efx_channel *channel)
393{
Ben Hutchings62776d02010-06-23 11:30:07 +0000394 netif_dbg(channel->efx, drv, channel->efx->net_dev,
395 "chan %d remove event queue\n", channel->channel);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100396
Ben Hutchings152b6a62009-11-29 03:43:56 +0000397 efx_nic_remove_eventq(channel);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100398}
399
400/**************************************************************************
401 *
402 * Channel handling
403 *
404 *************************************************************************/
405
Ben Hutchings8ceee662008-04-27 12:55:59 +0100406static int efx_probe_channel(struct efx_channel *channel)
407{
408 struct efx_tx_queue *tx_queue;
409 struct efx_rx_queue *rx_queue;
410 int rc;
411
Ben Hutchings62776d02010-06-23 11:30:07 +0000412 netif_dbg(channel->efx, probe, channel->efx->net_dev,
413 "creating channel %d\n", channel->channel);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100414
415 rc = efx_probe_eventq(channel);
416 if (rc)
417 goto fail1;
418
419 efx_for_each_channel_tx_queue(tx_queue, channel) {
420 rc = efx_probe_tx_queue(tx_queue);
421 if (rc)
422 goto fail2;
423 }
424
425 efx_for_each_channel_rx_queue(rx_queue, channel) {
426 rc = efx_probe_rx_queue(rx_queue);
427 if (rc)
428 goto fail3;
429 }
430
431 channel->n_rx_frm_trunc = 0;
432
433 return 0;
434
435 fail3:
436 efx_for_each_channel_rx_queue(rx_queue, channel)
437 efx_remove_rx_queue(rx_queue);
438 fail2:
439 efx_for_each_channel_tx_queue(tx_queue, channel)
440 efx_remove_tx_queue(tx_queue);
441 fail1:
442 return rc;
443}
444
445
Ben Hutchings56536e92008-12-12 21:37:02 -0800446static void efx_set_channel_names(struct efx_nic *efx)
447{
448 struct efx_channel *channel;
449 const char *type = "";
450 int number;
451
452 efx_for_each_channel(channel, efx) {
453 number = channel->channel;
Ben Hutchingsa4900ac2010-04-28 09:30:43 +0000454 if (efx->n_channels > efx->n_rx_channels) {
455 if (channel->channel < efx->n_rx_channels) {
Ben Hutchings56536e92008-12-12 21:37:02 -0800456 type = "-rx";
457 } else {
458 type = "-tx";
Ben Hutchingsa4900ac2010-04-28 09:30:43 +0000459 number -= efx->n_rx_channels;
Ben Hutchings56536e92008-12-12 21:37:02 -0800460 }
461 }
462 snprintf(channel->name, sizeof(channel->name),
463 "%s%s-%d", efx->name, type, number);
464 }
465}
466
Ben Hutchings8ceee662008-04-27 12:55:59 +0100467/* Channels are shutdown and reinitialised whilst the NIC is running
468 * to propagate configuration changes (mtu, checksum offload), or
469 * to clear hardware error conditions
470 */
Ben Hutchingsbc3c90a2008-09-01 12:48:46 +0100471static void efx_init_channels(struct efx_nic *efx)
Ben Hutchings8ceee662008-04-27 12:55:59 +0100472{
473 struct efx_tx_queue *tx_queue;
474 struct efx_rx_queue *rx_queue;
475 struct efx_channel *channel;
Ben Hutchings8ceee662008-04-27 12:55:59 +0100476
Ben Hutchingsf7f13b02008-05-16 21:15:06 +0100477 /* Calculate the rx buffer allocation parameters required to
478 * support the current MTU, including padding for header
479 * alignment and overruns.
480 */
481 efx->rx_buffer_len = (max(EFX_PAGE_IP_ALIGN, NET_IP_ALIGN) +
482 EFX_MAX_FRAME_LEN(efx->net_dev->mtu) +
Ben Hutchings39c9cf02010-06-23 11:31:28 +0000483 efx->type->rx_buffer_hash_size +
Ben Hutchingsf7f13b02008-05-16 21:15:06 +0100484 efx->type->rx_buffer_padding);
Steve Hodgson62b330b2010-06-01 11:20:53 +0000485 efx->rx_buffer_order = get_order(efx->rx_buffer_len +
486 sizeof(struct efx_rx_page_state));
Ben Hutchings8ceee662008-04-27 12:55:59 +0100487
488 /* Initialise the channels */
489 efx_for_each_channel(channel, efx) {
Ben Hutchings62776d02010-06-23 11:30:07 +0000490 netif_dbg(channel->efx, drv, channel->efx->net_dev,
491 "init chan %d\n", channel->channel);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100492
Ben Hutchingsbc3c90a2008-09-01 12:48:46 +0100493 efx_init_eventq(channel);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100494
Ben Hutchingsbc3c90a2008-09-01 12:48:46 +0100495 efx_for_each_channel_tx_queue(tx_queue, channel)
496 efx_init_tx_queue(tx_queue);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100497
498 /* The rx buffer allocation strategy is MTU dependent */
499 efx_rx_strategy(channel);
500
Ben Hutchingsbc3c90a2008-09-01 12:48:46 +0100501 efx_for_each_channel_rx_queue(rx_queue, channel)
502 efx_init_rx_queue(rx_queue);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100503
504 WARN_ON(channel->rx_pkt != NULL);
505 efx_rx_strategy(channel);
506 }
Ben Hutchings8ceee662008-04-27 12:55:59 +0100507}
508
509/* This enables event queue processing and packet transmission.
510 *
511 * Note that this function is not allowed to fail, since that would
512 * introduce too much complexity into the suspend/resume path.
513 */
514static void efx_start_channel(struct efx_channel *channel)
515{
516 struct efx_rx_queue *rx_queue;
517
Ben Hutchings62776d02010-06-23 11:30:07 +0000518 netif_dbg(channel->efx, ifup, channel->efx->net_dev,
519 "starting chan %d\n", channel->channel);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100520
Ben Hutchings5b9e2072008-05-16 21:18:14 +0100521 /* The interrupt handler for this channel may set work_pending
522 * as soon as we enable it. Make sure it's cleared before
523 * then. Similarly, make sure it sees the enabled flag set. */
Ben Hutchingsdc8cfa52008-09-01 12:46:50 +0100524 channel->work_pending = false;
525 channel->enabled = true;
Ben Hutchings5b9e2072008-05-16 21:18:14 +0100526 smp_wmb();
Ben Hutchings8ceee662008-04-27 12:55:59 +0100527
Steve Hodgson90d683a2010-06-01 11:19:39 +0000528 /* Fill the queues before enabling NAPI */
Ben Hutchings8ceee662008-04-27 12:55:59 +0100529 efx_for_each_channel_rx_queue(rx_queue, channel)
530 efx_fast_push_rx_descriptors(rx_queue);
Steve Hodgson90d683a2010-06-01 11:19:39 +0000531
532 napi_enable(&channel->napi_str);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100533}
534
535/* This disables event queue processing and packet transmission.
536 * This function does not guarantee that all queue processing
537 * (e.g. RX refill) is complete.
538 */
539static void efx_stop_channel(struct efx_channel *channel)
540{
Ben Hutchings8ceee662008-04-27 12:55:59 +0100541 if (!channel->enabled)
542 return;
543
Ben Hutchings62776d02010-06-23 11:30:07 +0000544 netif_dbg(channel->efx, ifdown, channel->efx->net_dev,
545 "stop chan %d\n", channel->channel);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100546
Ben Hutchingsdc8cfa52008-09-01 12:46:50 +0100547 channel->enabled = false;
Ben Hutchings8ceee662008-04-27 12:55:59 +0100548 napi_disable(&channel->napi_str);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100549}
550
551static void efx_fini_channels(struct efx_nic *efx)
552{
553 struct efx_channel *channel;
554 struct efx_tx_queue *tx_queue;
555 struct efx_rx_queue *rx_queue;
Ben Hutchings6bc5d3a2008-09-01 12:49:37 +0100556 int rc;
Ben Hutchings8ceee662008-04-27 12:55:59 +0100557
558 EFX_ASSERT_RESET_SERIALISED(efx);
559 BUG_ON(efx->port_enabled);
560
Ben Hutchings152b6a62009-11-29 03:43:56 +0000561 rc = efx_nic_flush_queues(efx);
Steve Hodgsonfd371e32010-06-01 11:17:51 +0000562 if (rc && EFX_WORKAROUND_7803(efx)) {
563 /* Schedule a reset to recover from the flush failure. The
564 * descriptor caches reference memory we're about to free,
565 * but falcon_reconfigure_mac_wrapper() won't reconnect
566 * the MACs because of the pending reset. */
Ben Hutchings62776d02010-06-23 11:30:07 +0000567 netif_err(efx, drv, efx->net_dev,
568 "Resetting to recover from flush failure\n");
Steve Hodgsonfd371e32010-06-01 11:17:51 +0000569 efx_schedule_reset(efx, RESET_TYPE_ALL);
570 } else if (rc) {
Ben Hutchings62776d02010-06-23 11:30:07 +0000571 netif_err(efx, drv, efx->net_dev, "failed to flush queues\n");
Steve Hodgsonfd371e32010-06-01 11:17:51 +0000572 } else {
Ben Hutchings62776d02010-06-23 11:30:07 +0000573 netif_dbg(efx, drv, efx->net_dev,
574 "successfully flushed all queues\n");
Steve Hodgsonfd371e32010-06-01 11:17:51 +0000575 }
Ben Hutchings6bc5d3a2008-09-01 12:49:37 +0100576
Ben Hutchings8ceee662008-04-27 12:55:59 +0100577 efx_for_each_channel(channel, efx) {
Ben Hutchings62776d02010-06-23 11:30:07 +0000578 netif_dbg(channel->efx, drv, channel->efx->net_dev,
579 "shut down chan %d\n", channel->channel);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100580
581 efx_for_each_channel_rx_queue(rx_queue, channel)
582 efx_fini_rx_queue(rx_queue);
583 efx_for_each_channel_tx_queue(tx_queue, channel)
584 efx_fini_tx_queue(tx_queue);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100585 efx_fini_eventq(channel);
586 }
587}
588
589static void efx_remove_channel(struct efx_channel *channel)
590{
591 struct efx_tx_queue *tx_queue;
592 struct efx_rx_queue *rx_queue;
593
Ben Hutchings62776d02010-06-23 11:30:07 +0000594 netif_dbg(channel->efx, drv, channel->efx->net_dev,
595 "destroy chan %d\n", channel->channel);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100596
597 efx_for_each_channel_rx_queue(rx_queue, channel)
598 efx_remove_rx_queue(rx_queue);
599 efx_for_each_channel_tx_queue(tx_queue, channel)
600 efx_remove_tx_queue(tx_queue);
601 efx_remove_eventq(channel);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100602}
603
Steve Hodgson90d683a2010-06-01 11:19:39 +0000604void efx_schedule_slow_fill(struct efx_rx_queue *rx_queue)
Ben Hutchings8ceee662008-04-27 12:55:59 +0100605{
Steve Hodgson90d683a2010-06-01 11:19:39 +0000606 mod_timer(&rx_queue->slow_fill, jiffies + msecs_to_jiffies(100));
Ben Hutchings8ceee662008-04-27 12:55:59 +0100607}
608
609/**************************************************************************
610 *
611 * Port handling
612 *
613 **************************************************************************/
614
615/* This ensures that the kernel is kept informed (via
616 * netif_carrier_on/off) of the link status, and also maintains the
617 * link status's stop on the port's TX queue.
618 */
Steve Hodgsonfdaa9ae2009-11-28 05:34:05 +0000619void efx_link_status_changed(struct efx_nic *efx)
Ben Hutchings8ceee662008-04-27 12:55:59 +0100620{
Ben Hutchingseb50c0d2009-11-23 16:06:30 +0000621 struct efx_link_state *link_state = &efx->link_state;
622
Ben Hutchings8ceee662008-04-27 12:55:59 +0100623 /* SFC Bug 5356: A net_dev notifier is registered, so we must ensure
624 * that no events are triggered between unregister_netdev() and the
625 * driver unloading. A more general condition is that NETDEV_CHANGE
626 * can only be generated between NETDEV_UP and NETDEV_DOWN */
627 if (!netif_running(efx->net_dev))
628 return;
629
Ben Hutchings8c8661e2008-09-01 12:49:02 +0100630 if (efx->port_inhibited) {
631 netif_carrier_off(efx->net_dev);
632 return;
633 }
634
Ben Hutchingseb50c0d2009-11-23 16:06:30 +0000635 if (link_state->up != netif_carrier_ok(efx->net_dev)) {
Ben Hutchings8ceee662008-04-27 12:55:59 +0100636 efx->n_link_state_changes++;
637
Ben Hutchingseb50c0d2009-11-23 16:06:30 +0000638 if (link_state->up)
Ben Hutchings8ceee662008-04-27 12:55:59 +0100639 netif_carrier_on(efx->net_dev);
640 else
641 netif_carrier_off(efx->net_dev);
642 }
643
644 /* Status message for kernel log */
Ben Hutchingseb50c0d2009-11-23 16:06:30 +0000645 if (link_state->up) {
Ben Hutchings62776d02010-06-23 11:30:07 +0000646 netif_info(efx, link, efx->net_dev,
647 "link up at %uMbps %s-duplex (MTU %d)%s\n",
648 link_state->speed, link_state->fd ? "full" : "half",
649 efx->net_dev->mtu,
650 (efx->promiscuous ? " [PROMISC]" : ""));
Ben Hutchings8ceee662008-04-27 12:55:59 +0100651 } else {
Ben Hutchings62776d02010-06-23 11:30:07 +0000652 netif_info(efx, link, efx->net_dev, "link down\n");
Ben Hutchings8ceee662008-04-27 12:55:59 +0100653 }
654
655}
656
Ben Hutchingsd3245b22009-11-29 03:42:41 +0000657void efx_link_set_advertising(struct efx_nic *efx, u32 advertising)
658{
659 efx->link_advertising = advertising;
660 if (advertising) {
661 if (advertising & ADVERTISED_Pause)
662 efx->wanted_fc |= (EFX_FC_TX | EFX_FC_RX);
663 else
664 efx->wanted_fc &= ~(EFX_FC_TX | EFX_FC_RX);
665 if (advertising & ADVERTISED_Asym_Pause)
666 efx->wanted_fc ^= EFX_FC_TX;
667 }
668}
669
670void efx_link_set_wanted_fc(struct efx_nic *efx, enum efx_fc_type wanted_fc)
671{
672 efx->wanted_fc = wanted_fc;
673 if (efx->link_advertising) {
674 if (wanted_fc & EFX_FC_RX)
675 efx->link_advertising |= (ADVERTISED_Pause |
676 ADVERTISED_Asym_Pause);
677 else
678 efx->link_advertising &= ~(ADVERTISED_Pause |
679 ADVERTISED_Asym_Pause);
680 if (wanted_fc & EFX_FC_TX)
681 efx->link_advertising ^= ADVERTISED_Asym_Pause;
682 }
683}
684
Ben Hutchings115122a2009-03-04 09:52:52 +0000685static void efx_fini_port(struct efx_nic *efx);
686
Ben Hutchingsd3245b22009-11-29 03:42:41 +0000687/* Push loopback/power/transmit disable settings to the PHY, and reconfigure
688 * the MAC appropriately. All other PHY configuration changes are pushed
689 * through phy_op->set_settings(), and pushed asynchronously to the MAC
690 * through efx_monitor().
691 *
692 * Callers must hold the mac_lock
693 */
694int __efx_reconfigure_port(struct efx_nic *efx)
Ben Hutchings8ceee662008-04-27 12:55:59 +0100695{
Ben Hutchingsd3245b22009-11-29 03:42:41 +0000696 enum efx_phy_mode phy_mode;
697 int rc;
Ben Hutchings8ceee662008-04-27 12:55:59 +0100698
Ben Hutchingsd3245b22009-11-29 03:42:41 +0000699 WARN_ON(!mutex_is_locked(&efx->mac_lock));
Ben Hutchings8ceee662008-04-27 12:55:59 +0100700
Ben Hutchingsa816f752008-09-01 12:49:12 +0100701 /* Serialise the promiscuous flag with efx_set_multicast_list. */
702 if (efx_dev_registered(efx)) {
703 netif_addr_lock_bh(efx->net_dev);
704 netif_addr_unlock_bh(efx->net_dev);
705 }
706
Ben Hutchingsd3245b22009-11-29 03:42:41 +0000707 /* Disable PHY transmit in mac level loopbacks */
708 phy_mode = efx->phy_mode;
Ben Hutchings177dfcd2008-12-12 21:50:08 -0800709 if (LOOPBACK_INTERNAL(efx))
710 efx->phy_mode |= PHY_MODE_TX_DISABLED;
711 else
712 efx->phy_mode &= ~PHY_MODE_TX_DISABLED;
Ben Hutchings177dfcd2008-12-12 21:50:08 -0800713
Ben Hutchingsd3245b22009-11-29 03:42:41 +0000714 rc = efx->type->reconfigure_port(efx);
Ben Hutchings177dfcd2008-12-12 21:50:08 -0800715
Ben Hutchingsd3245b22009-11-29 03:42:41 +0000716 if (rc)
717 efx->phy_mode = phy_mode;
Ben Hutchings8ceee662008-04-27 12:55:59 +0100718
Ben Hutchingsd3245b22009-11-29 03:42:41 +0000719 return rc;
Ben Hutchings8ceee662008-04-27 12:55:59 +0100720}
721
722/* Reinitialise the MAC to pick up new PHY settings, even if the port is
723 * disabled. */
Ben Hutchingsd3245b22009-11-29 03:42:41 +0000724int efx_reconfigure_port(struct efx_nic *efx)
Ben Hutchings8ceee662008-04-27 12:55:59 +0100725{
Ben Hutchingsd3245b22009-11-29 03:42:41 +0000726 int rc;
727
Ben Hutchings8ceee662008-04-27 12:55:59 +0100728 EFX_ASSERT_RESET_SERIALISED(efx);
729
730 mutex_lock(&efx->mac_lock);
Ben Hutchingsd3245b22009-11-29 03:42:41 +0000731 rc = __efx_reconfigure_port(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100732 mutex_unlock(&efx->mac_lock);
Ben Hutchingsd3245b22009-11-29 03:42:41 +0000733
734 return rc;
Ben Hutchings8ceee662008-04-27 12:55:59 +0100735}
736
Ben Hutchings8be4f3e2009-11-25 16:12:16 +0000737/* Asynchronous work item for changing MAC promiscuity and multicast
738 * hash. Avoid a drain/rx_ingress enable by reconfiguring the current
739 * MAC directly. */
Ben Hutchings766ca0f2008-12-12 21:59:24 -0800740static void efx_mac_work(struct work_struct *data)
741{
742 struct efx_nic *efx = container_of(data, struct efx_nic, mac_work);
743
744 mutex_lock(&efx->mac_lock);
Ben Hutchings8be4f3e2009-11-25 16:12:16 +0000745 if (efx->port_enabled) {
Ben Hutchingsef2b90e2009-11-29 03:42:31 +0000746 efx->type->push_multicast_hash(efx);
Ben Hutchings8be4f3e2009-11-25 16:12:16 +0000747 efx->mac_op->reconfigure(efx);
748 }
Ben Hutchings766ca0f2008-12-12 21:59:24 -0800749 mutex_unlock(&efx->mac_lock);
750}
751
Ben Hutchings8ceee662008-04-27 12:55:59 +0100752static int efx_probe_port(struct efx_nic *efx)
753{
754 int rc;
755
Ben Hutchings62776d02010-06-23 11:30:07 +0000756 netif_dbg(efx, probe, efx->net_dev, "create port\n");
Ben Hutchings8ceee662008-04-27 12:55:59 +0100757
Steve Hodgsonff3b00a2009-12-23 13:46:36 +0000758 if (phy_flash_cfg)
759 efx->phy_mode = PHY_MODE_SPECIAL;
760
Ben Hutchingsef2b90e2009-11-29 03:42:31 +0000761 /* Connect up MAC/PHY operations table */
762 rc = efx->type->probe_port(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100763 if (rc)
764 goto err;
765
766 /* Sanity check MAC address */
767 if (is_valid_ether_addr(efx->mac_address)) {
768 memcpy(efx->net_dev->dev_addr, efx->mac_address, ETH_ALEN);
769 } else {
Ben Hutchings62776d02010-06-23 11:30:07 +0000770 netif_err(efx, probe, efx->net_dev, "invalid MAC address %pM\n",
771 efx->mac_address);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100772 if (!allow_bad_hwaddr) {
773 rc = -EINVAL;
774 goto err;
775 }
776 random_ether_addr(efx->net_dev->dev_addr);
Ben Hutchings62776d02010-06-23 11:30:07 +0000777 netif_info(efx, probe, efx->net_dev,
778 "using locally-generated MAC %pM\n",
779 efx->net_dev->dev_addr);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100780 }
781
782 return 0;
783
784 err:
785 efx_remove_port(efx);
786 return rc;
787}
788
789static int efx_init_port(struct efx_nic *efx)
790{
791 int rc;
792
Ben Hutchings62776d02010-06-23 11:30:07 +0000793 netif_dbg(efx, drv, efx->net_dev, "init port\n");
Ben Hutchings8ceee662008-04-27 12:55:59 +0100794
Ben Hutchings1dfc5ce2009-11-25 16:11:19 +0000795 mutex_lock(&efx->mac_lock);
796
Ben Hutchings177dfcd2008-12-12 21:50:08 -0800797 rc = efx->phy_op->init(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100798 if (rc)
Ben Hutchings1dfc5ce2009-11-25 16:11:19 +0000799 goto fail1;
Ben Hutchings8ceee662008-04-27 12:55:59 +0100800
Ben Hutchingsdc8cfa52008-09-01 12:46:50 +0100801 efx->port_initialized = true;
Ben Hutchings1dfc5ce2009-11-25 16:11:19 +0000802
Ben Hutchingsd3245b22009-11-29 03:42:41 +0000803 /* Reconfigure the MAC before creating dma queues (required for
804 * Falcon/A1 where RX_INGR_EN/TX_DRAIN_EN isn't supported) */
805 efx->mac_op->reconfigure(efx);
806
807 /* Ensure the PHY advertises the correct flow control settings */
808 rc = efx->phy_op->reconfigure(efx);
809 if (rc)
810 goto fail2;
811
Ben Hutchings1dfc5ce2009-11-25 16:11:19 +0000812 mutex_unlock(&efx->mac_lock);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100813 return 0;
Ben Hutchings177dfcd2008-12-12 21:50:08 -0800814
Ben Hutchings1dfc5ce2009-11-25 16:11:19 +0000815fail2:
Ben Hutchings177dfcd2008-12-12 21:50:08 -0800816 efx->phy_op->fini(efx);
Ben Hutchings1dfc5ce2009-11-25 16:11:19 +0000817fail1:
818 mutex_unlock(&efx->mac_lock);
Ben Hutchings177dfcd2008-12-12 21:50:08 -0800819 return rc;
Ben Hutchings8ceee662008-04-27 12:55:59 +0100820}
821
Ben Hutchings8ceee662008-04-27 12:55:59 +0100822static void efx_start_port(struct efx_nic *efx)
823{
Ben Hutchings62776d02010-06-23 11:30:07 +0000824 netif_dbg(efx, ifup, efx->net_dev, "start port\n");
Ben Hutchings8ceee662008-04-27 12:55:59 +0100825 BUG_ON(efx->port_enabled);
826
827 mutex_lock(&efx->mac_lock);
Ben Hutchingsdc8cfa52008-09-01 12:46:50 +0100828 efx->port_enabled = true;
Ben Hutchings8be4f3e2009-11-25 16:12:16 +0000829
830 /* efx_mac_work() might have been scheduled after efx_stop_port(),
831 * and then cancelled by efx_flush_all() */
Ben Hutchingsef2b90e2009-11-29 03:42:31 +0000832 efx->type->push_multicast_hash(efx);
Ben Hutchings8be4f3e2009-11-25 16:12:16 +0000833 efx->mac_op->reconfigure(efx);
834
Ben Hutchings8ceee662008-04-27 12:55:59 +0100835 mutex_unlock(&efx->mac_lock);
836}
837
Steve Hodgsonfdaa9ae2009-11-28 05:34:05 +0000838/* Prevent efx_mac_work() and efx_monitor() from working */
Ben Hutchings8ceee662008-04-27 12:55:59 +0100839static void efx_stop_port(struct efx_nic *efx)
840{
Ben Hutchings62776d02010-06-23 11:30:07 +0000841 netif_dbg(efx, ifdown, efx->net_dev, "stop port\n");
Ben Hutchings8ceee662008-04-27 12:55:59 +0100842
843 mutex_lock(&efx->mac_lock);
Ben Hutchingsdc8cfa52008-09-01 12:46:50 +0100844 efx->port_enabled = false;
Ben Hutchings8ceee662008-04-27 12:55:59 +0100845 mutex_unlock(&efx->mac_lock);
846
847 /* Serialise against efx_set_multicast_list() */
Ben Hutchings55668612008-05-16 21:16:10 +0100848 if (efx_dev_registered(efx)) {
David S. Millerb9e40852008-07-15 00:15:08 -0700849 netif_addr_lock_bh(efx->net_dev);
850 netif_addr_unlock_bh(efx->net_dev);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100851 }
852}
853
854static void efx_fini_port(struct efx_nic *efx)
855{
Ben Hutchings62776d02010-06-23 11:30:07 +0000856 netif_dbg(efx, drv, efx->net_dev, "shut down port\n");
Ben Hutchings8ceee662008-04-27 12:55:59 +0100857
858 if (!efx->port_initialized)
859 return;
860
Ben Hutchings177dfcd2008-12-12 21:50:08 -0800861 efx->phy_op->fini(efx);
Ben Hutchingsdc8cfa52008-09-01 12:46:50 +0100862 efx->port_initialized = false;
Ben Hutchings8ceee662008-04-27 12:55:59 +0100863
Ben Hutchingseb50c0d2009-11-23 16:06:30 +0000864 efx->link_state.up = false;
Ben Hutchings8ceee662008-04-27 12:55:59 +0100865 efx_link_status_changed(efx);
866}
867
868static void efx_remove_port(struct efx_nic *efx)
869{
Ben Hutchings62776d02010-06-23 11:30:07 +0000870 netif_dbg(efx, drv, efx->net_dev, "destroying port\n");
Ben Hutchings8ceee662008-04-27 12:55:59 +0100871
Ben Hutchingsef2b90e2009-11-29 03:42:31 +0000872 efx->type->remove_port(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100873}
874
875/**************************************************************************
876 *
877 * NIC handling
878 *
879 **************************************************************************/
880
881/* This configures the PCI device to enable I/O and DMA. */
882static int efx_init_io(struct efx_nic *efx)
883{
884 struct pci_dev *pci_dev = efx->pci_dev;
885 dma_addr_t dma_mask = efx->type->max_dma_mask;
886 int rc;
887
Ben Hutchings62776d02010-06-23 11:30:07 +0000888 netif_dbg(efx, probe, efx->net_dev, "initialising I/O\n");
Ben Hutchings8ceee662008-04-27 12:55:59 +0100889
890 rc = pci_enable_device(pci_dev);
891 if (rc) {
Ben Hutchings62776d02010-06-23 11:30:07 +0000892 netif_err(efx, probe, efx->net_dev,
893 "failed to enable PCI device\n");
Ben Hutchings8ceee662008-04-27 12:55:59 +0100894 goto fail1;
895 }
896
897 pci_set_master(pci_dev);
898
899 /* Set the PCI DMA mask. Try all possibilities from our
900 * genuine mask down to 32 bits, because some architectures
901 * (e.g. x86_64 with iommu_sac_force set) will allow 40 bit
902 * masks event though they reject 46 bit masks.
903 */
904 while (dma_mask > 0x7fffffffUL) {
905 if (pci_dma_supported(pci_dev, dma_mask) &&
906 ((rc = pci_set_dma_mask(pci_dev, dma_mask)) == 0))
907 break;
908 dma_mask >>= 1;
909 }
910 if (rc) {
Ben Hutchings62776d02010-06-23 11:30:07 +0000911 netif_err(efx, probe, efx->net_dev,
912 "could not find a suitable DMA mask\n");
Ben Hutchings8ceee662008-04-27 12:55:59 +0100913 goto fail2;
914 }
Ben Hutchings62776d02010-06-23 11:30:07 +0000915 netif_dbg(efx, probe, efx->net_dev,
916 "using DMA mask %llx\n", (unsigned long long) dma_mask);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100917 rc = pci_set_consistent_dma_mask(pci_dev, dma_mask);
918 if (rc) {
919 /* pci_set_consistent_dma_mask() is not *allowed* to
920 * fail with a mask that pci_set_dma_mask() accepted,
921 * but just in case...
922 */
Ben Hutchings62776d02010-06-23 11:30:07 +0000923 netif_err(efx, probe, efx->net_dev,
924 "failed to set consistent DMA mask\n");
Ben Hutchings8ceee662008-04-27 12:55:59 +0100925 goto fail2;
926 }
927
Ben Hutchingsdc803df2009-10-23 08:32:33 +0000928 efx->membase_phys = pci_resource_start(efx->pci_dev, EFX_MEM_BAR);
929 rc = pci_request_region(pci_dev, EFX_MEM_BAR, "sfc");
Ben Hutchings8ceee662008-04-27 12:55:59 +0100930 if (rc) {
Ben Hutchings62776d02010-06-23 11:30:07 +0000931 netif_err(efx, probe, efx->net_dev,
932 "request for memory BAR failed\n");
Ben Hutchings8ceee662008-04-27 12:55:59 +0100933 rc = -EIO;
934 goto fail3;
935 }
936 efx->membase = ioremap_nocache(efx->membase_phys,
937 efx->type->mem_map_size);
938 if (!efx->membase) {
Ben Hutchings62776d02010-06-23 11:30:07 +0000939 netif_err(efx, probe, efx->net_dev,
940 "could not map memory BAR at %llx+%x\n",
941 (unsigned long long)efx->membase_phys,
942 efx->type->mem_map_size);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100943 rc = -ENOMEM;
944 goto fail4;
945 }
Ben Hutchings62776d02010-06-23 11:30:07 +0000946 netif_dbg(efx, probe, efx->net_dev,
947 "memory BAR at %llx+%x (virtual %p)\n",
948 (unsigned long long)efx->membase_phys,
949 efx->type->mem_map_size, efx->membase);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100950
951 return 0;
952
953 fail4:
Ben Hutchingsdc803df2009-10-23 08:32:33 +0000954 pci_release_region(efx->pci_dev, EFX_MEM_BAR);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100955 fail3:
Ben Hutchings2c118e02008-05-16 21:15:29 +0100956 efx->membase_phys = 0;
Ben Hutchings8ceee662008-04-27 12:55:59 +0100957 fail2:
958 pci_disable_device(efx->pci_dev);
959 fail1:
960 return rc;
961}
962
963static void efx_fini_io(struct efx_nic *efx)
964{
Ben Hutchings62776d02010-06-23 11:30:07 +0000965 netif_dbg(efx, drv, efx->net_dev, "shutting down I/O\n");
Ben Hutchings8ceee662008-04-27 12:55:59 +0100966
967 if (efx->membase) {
968 iounmap(efx->membase);
969 efx->membase = NULL;
970 }
971
972 if (efx->membase_phys) {
Ben Hutchingsdc803df2009-10-23 08:32:33 +0000973 pci_release_region(efx->pci_dev, EFX_MEM_BAR);
Ben Hutchings2c118e02008-05-16 21:15:29 +0100974 efx->membase_phys = 0;
Ben Hutchings8ceee662008-04-27 12:55:59 +0100975 }
976
977 pci_disable_device(efx->pci_dev);
978}
979
Ben Hutchingsa4900ac2010-04-28 09:30:43 +0000980/* Get number of channels wanted. Each channel will have its own IRQ,
981 * 1 RX queue and/or 2 TX queues. */
982static int efx_wanted_channels(void)
Ben Hutchings46123d02008-09-01 12:47:33 +0100983{
Rusty Russell2f8975f2009-01-10 21:58:09 -0800984 cpumask_var_t core_mask;
Ben Hutchings46123d02008-09-01 12:47:33 +0100985 int count;
986 int cpu;
987
Li Zefan79f55992009-06-15 14:58:26 +0800988 if (unlikely(!zalloc_cpumask_var(&core_mask, GFP_KERNEL))) {
Rusty Russell2f8975f2009-01-10 21:58:09 -0800989 printk(KERN_WARNING
Mike Travis3977d032009-05-12 10:48:36 +0000990 "sfc: RSS disabled due to allocation failure\n");
Rusty Russell2f8975f2009-01-10 21:58:09 -0800991 return 1;
992 }
993
Ben Hutchings46123d02008-09-01 12:47:33 +0100994 count = 0;
995 for_each_online_cpu(cpu) {
Rusty Russell2f8975f2009-01-10 21:58:09 -0800996 if (!cpumask_test_cpu(cpu, core_mask)) {
Ben Hutchings46123d02008-09-01 12:47:33 +0100997 ++count;
Rusty Russell2f8975f2009-01-10 21:58:09 -0800998 cpumask_or(core_mask, core_mask,
Rusty Russellfbd59a82009-01-10 21:58:08 -0800999 topology_core_cpumask(cpu));
Ben Hutchings46123d02008-09-01 12:47:33 +01001000 }
1001 }
1002
Rusty Russell2f8975f2009-01-10 21:58:09 -08001003 free_cpumask_var(core_mask);
Ben Hutchings46123d02008-09-01 12:47:33 +01001004 return count;
1005}
1006
1007/* Probe the number and type of interrupts we are able to obtain, and
1008 * the resulting numbers of channels and RX queues.
1009 */
Ben Hutchings8ceee662008-04-27 12:55:59 +01001010static void efx_probe_interrupts(struct efx_nic *efx)
1011{
Ben Hutchings46123d02008-09-01 12:47:33 +01001012 int max_channels =
1013 min_t(int, efx->type->phys_addr_channels, EFX_MAX_CHANNELS);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001014 int rc, i;
1015
1016 if (efx->interrupt_mode == EFX_INT_MODE_MSIX) {
Ben Hutchings46123d02008-09-01 12:47:33 +01001017 struct msix_entry xentries[EFX_MAX_CHANNELS];
Ben Hutchingsa4900ac2010-04-28 09:30:43 +00001018 int n_channels;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001019
Ben Hutchingsa4900ac2010-04-28 09:30:43 +00001020 n_channels = efx_wanted_channels();
1021 if (separate_tx_channels)
1022 n_channels *= 2;
1023 n_channels = min(n_channels, max_channels);
Ben Hutchingsaa6ef272008-07-18 19:03:10 +01001024
Ben Hutchingsa4900ac2010-04-28 09:30:43 +00001025 for (i = 0; i < n_channels; i++)
Ben Hutchings8ceee662008-04-27 12:55:59 +01001026 xentries[i].entry = i;
Ben Hutchingsa4900ac2010-04-28 09:30:43 +00001027 rc = pci_enable_msix(efx->pci_dev, xentries, n_channels);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001028 if (rc > 0) {
Ben Hutchings62776d02010-06-23 11:30:07 +00001029 netif_err(efx, drv, efx->net_dev,
1030 "WARNING: Insufficient MSI-X vectors"
1031 " available (%d < %d).\n", rc, n_channels);
1032 netif_err(efx, drv, efx->net_dev,
1033 "WARNING: Performance may be reduced.\n");
Ben Hutchingsa4900ac2010-04-28 09:30:43 +00001034 EFX_BUG_ON_PARANOID(rc >= n_channels);
1035 n_channels = rc;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001036 rc = pci_enable_msix(efx->pci_dev, xentries,
Ben Hutchingsa4900ac2010-04-28 09:30:43 +00001037 n_channels);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001038 }
1039
1040 if (rc == 0) {
Ben Hutchingsa4900ac2010-04-28 09:30:43 +00001041 efx->n_channels = n_channels;
1042 if (separate_tx_channels) {
1043 efx->n_tx_channels =
1044 max(efx->n_channels / 2, 1U);
1045 efx->n_rx_channels =
1046 max(efx->n_channels -
1047 efx->n_tx_channels, 1U);
1048 } else {
1049 efx->n_tx_channels = efx->n_channels;
1050 efx->n_rx_channels = efx->n_channels;
1051 }
1052 for (i = 0; i < n_channels; i++)
Ben Hutchings8ceee662008-04-27 12:55:59 +01001053 efx->channel[i].irq = xentries[i].vector;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001054 } else {
1055 /* Fall back to single channel MSI */
1056 efx->interrupt_mode = EFX_INT_MODE_MSI;
Ben Hutchings62776d02010-06-23 11:30:07 +00001057 netif_err(efx, drv, efx->net_dev,
1058 "could not enable MSI-X\n");
Ben Hutchings8ceee662008-04-27 12:55:59 +01001059 }
1060 }
1061
1062 /* Try single interrupt MSI */
1063 if (efx->interrupt_mode == EFX_INT_MODE_MSI) {
Neil Turton28b581a2008-12-12 21:41:06 -08001064 efx->n_channels = 1;
Ben Hutchingsa4900ac2010-04-28 09:30:43 +00001065 efx->n_rx_channels = 1;
1066 efx->n_tx_channels = 1;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001067 rc = pci_enable_msi(efx->pci_dev);
1068 if (rc == 0) {
1069 efx->channel[0].irq = efx->pci_dev->irq;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001070 } else {
Ben Hutchings62776d02010-06-23 11:30:07 +00001071 netif_err(efx, drv, efx->net_dev,
1072 "could not enable MSI\n");
Ben Hutchings8ceee662008-04-27 12:55:59 +01001073 efx->interrupt_mode = EFX_INT_MODE_LEGACY;
1074 }
1075 }
1076
1077 /* Assume legacy interrupts */
1078 if (efx->interrupt_mode == EFX_INT_MODE_LEGACY) {
Neil Turton28b581a2008-12-12 21:41:06 -08001079 efx->n_channels = 1 + (separate_tx_channels ? 1 : 0);
Ben Hutchingsa4900ac2010-04-28 09:30:43 +00001080 efx->n_rx_channels = 1;
1081 efx->n_tx_channels = 1;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001082 efx->legacy_irq = efx->pci_dev->irq;
1083 }
1084}
1085
1086static void efx_remove_interrupts(struct efx_nic *efx)
1087{
1088 struct efx_channel *channel;
1089
1090 /* Remove MSI/MSI-X interrupts */
Ben Hutchings64ee3122008-09-01 12:47:38 +01001091 efx_for_each_channel(channel, efx)
Ben Hutchings8ceee662008-04-27 12:55:59 +01001092 channel->irq = 0;
1093 pci_disable_msi(efx->pci_dev);
1094 pci_disable_msix(efx->pci_dev);
1095
1096 /* Remove legacy interrupt */
1097 efx->legacy_irq = 0;
1098}
1099
Ben Hutchings8831da72008-09-01 12:47:48 +01001100static void efx_set_channels(struct efx_nic *efx)
Ben Hutchings8ceee662008-04-27 12:55:59 +01001101{
Ben Hutchingsa4900ac2010-04-28 09:30:43 +00001102 struct efx_channel *channel;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001103 struct efx_tx_queue *tx_queue;
1104 struct efx_rx_queue *rx_queue;
Ben Hutchingsa4900ac2010-04-28 09:30:43 +00001105 unsigned tx_channel_offset =
1106 separate_tx_channels ? efx->n_channels - efx->n_tx_channels : 0;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001107
Ben Hutchingsa4900ac2010-04-28 09:30:43 +00001108 efx_for_each_channel(channel, efx) {
1109 if (channel->channel - tx_channel_offset < efx->n_tx_channels) {
1110 channel->tx_queue = &efx->tx_queue[
1111 (channel->channel - tx_channel_offset) *
1112 EFX_TXQ_TYPES];
1113 efx_for_each_channel_tx_queue(tx_queue, channel)
1114 tx_queue->channel = channel;
1115 }
Ben Hutchings60ac1062008-09-01 12:44:59 +01001116 }
Ben Hutchings8ceee662008-04-27 12:55:59 +01001117
Ben Hutchingsa4900ac2010-04-28 09:30:43 +00001118 efx_for_each_rx_queue(rx_queue, efx)
Ben Hutchings8831da72008-09-01 12:47:48 +01001119 rx_queue->channel = &efx->channel[rx_queue->queue];
Ben Hutchings8ceee662008-04-27 12:55:59 +01001120}
1121
1122static int efx_probe_nic(struct efx_nic *efx)
1123{
1124 int rc;
1125
Ben Hutchings62776d02010-06-23 11:30:07 +00001126 netif_dbg(efx, probe, efx->net_dev, "creating NIC\n");
Ben Hutchings8ceee662008-04-27 12:55:59 +01001127
1128 /* Carry out hardware-type specific initialisation */
Ben Hutchingsef2b90e2009-11-29 03:42:31 +00001129 rc = efx->type->probe(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001130 if (rc)
1131 return rc;
1132
Ben Hutchingsa4900ac2010-04-28 09:30:43 +00001133 /* Determine the number of channels and queues by trying to hook
Ben Hutchings8ceee662008-04-27 12:55:59 +01001134 * in MSI-X interrupts. */
1135 efx_probe_interrupts(efx);
1136
Ben Hutchings8831da72008-09-01 12:47:48 +01001137 efx_set_channels(efx);
Ben Hutchingsa4900ac2010-04-28 09:30:43 +00001138 efx->net_dev->real_num_tx_queues = efx->n_tx_channels;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001139
1140 /* Initialise the interrupt moderation settings */
Ben Hutchings6fb70fd2009-03-20 13:30:37 +00001141 efx_init_irq_moderation(efx, tx_irq_mod_usec, rx_irq_mod_usec, true);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001142
1143 return 0;
1144}
1145
1146static void efx_remove_nic(struct efx_nic *efx)
1147{
Ben Hutchings62776d02010-06-23 11:30:07 +00001148 netif_dbg(efx, drv, efx->net_dev, "destroying NIC\n");
Ben Hutchings8ceee662008-04-27 12:55:59 +01001149
1150 efx_remove_interrupts(efx);
Ben Hutchingsef2b90e2009-11-29 03:42:31 +00001151 efx->type->remove(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001152}
1153
1154/**************************************************************************
1155 *
1156 * NIC startup/shutdown
1157 *
1158 *************************************************************************/
1159
1160static int efx_probe_all(struct efx_nic *efx)
1161{
1162 struct efx_channel *channel;
1163 int rc;
1164
1165 /* Create NIC */
1166 rc = efx_probe_nic(efx);
1167 if (rc) {
Ben Hutchings62776d02010-06-23 11:30:07 +00001168 netif_err(efx, probe, efx->net_dev, "failed to create NIC\n");
Ben Hutchings8ceee662008-04-27 12:55:59 +01001169 goto fail1;
1170 }
1171
1172 /* Create port */
1173 rc = efx_probe_port(efx);
1174 if (rc) {
Ben Hutchings62776d02010-06-23 11:30:07 +00001175 netif_err(efx, probe, efx->net_dev, "failed to create port\n");
Ben Hutchings8ceee662008-04-27 12:55:59 +01001176 goto fail2;
1177 }
1178
1179 /* Create channels */
1180 efx_for_each_channel(channel, efx) {
1181 rc = efx_probe_channel(channel);
1182 if (rc) {
Ben Hutchings62776d02010-06-23 11:30:07 +00001183 netif_err(efx, probe, efx->net_dev,
1184 "failed to create channel %d\n",
1185 channel->channel);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001186 goto fail3;
1187 }
1188 }
Ben Hutchings56536e92008-12-12 21:37:02 -08001189 efx_set_channel_names(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001190
1191 return 0;
1192
1193 fail3:
1194 efx_for_each_channel(channel, efx)
1195 efx_remove_channel(channel);
1196 efx_remove_port(efx);
1197 fail2:
1198 efx_remove_nic(efx);
1199 fail1:
1200 return rc;
1201}
1202
1203/* Called after previous invocation(s) of efx_stop_all, restarts the
1204 * port, kernel transmit queue, NAPI processing and hardware interrupts,
1205 * and ensures that the port is scheduled to be reconfigured.
1206 * This function is safe to call multiple times when the NIC is in any
1207 * state. */
1208static void efx_start_all(struct efx_nic *efx)
1209{
1210 struct efx_channel *channel;
1211
1212 EFX_ASSERT_RESET_SERIALISED(efx);
1213
1214 /* Check that it is appropriate to restart the interface. All
1215 * of these flags are safe to read under just the rtnl lock */
1216 if (efx->port_enabled)
1217 return;
1218 if ((efx->state != STATE_RUNNING) && (efx->state != STATE_INIT))
1219 return;
Ben Hutchings55668612008-05-16 21:16:10 +01001220 if (efx_dev_registered(efx) && !netif_running(efx->net_dev))
Ben Hutchings8ceee662008-04-27 12:55:59 +01001221 return;
1222
1223 /* Mark the port as enabled so port reconfigurations can start, then
1224 * restart the transmit interface early so the watchdog timer stops */
1225 efx_start_port(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001226
Ben Hutchingsa4900ac2010-04-28 09:30:43 +00001227 efx_for_each_channel(channel, efx) {
1228 if (efx_dev_registered(efx))
1229 efx_wake_queue(channel);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001230 efx_start_channel(channel);
Ben Hutchingsa4900ac2010-04-28 09:30:43 +00001231 }
Ben Hutchings8ceee662008-04-27 12:55:59 +01001232
Ben Hutchings152b6a62009-11-29 03:43:56 +00001233 efx_nic_enable_interrupts(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001234
Ben Hutchings8880f4e2009-11-29 15:15:41 +00001235 /* Switch to event based MCDI completions after enabling interrupts.
1236 * If a reset has been scheduled, then we need to stay in polled mode.
1237 * Rather than serialising efx_mcdi_mode_event() [which sleeps] and
1238 * reset_pending [modified from an atomic context], we instead guarantee
1239 * that efx_mcdi_mode_poll() isn't reverted erroneously */
1240 efx_mcdi_mode_event(efx);
1241 if (efx->reset_pending != RESET_TYPE_NONE)
1242 efx_mcdi_mode_poll(efx);
1243
Steve Hodgson78c1f0a2009-11-29 03:43:00 +00001244 /* Start the hardware monitor if there is one. Otherwise (we're link
1245 * event driven), we have to poll the PHY because after an event queue
1246 * flush, we could have a missed a link state change */
1247 if (efx->type->monitor != NULL) {
Ben Hutchings8ceee662008-04-27 12:55:59 +01001248 queue_delayed_work(efx->workqueue, &efx->monitor_work,
1249 efx_monitor_interval);
Steve Hodgson78c1f0a2009-11-29 03:43:00 +00001250 } else {
1251 mutex_lock(&efx->mac_lock);
1252 if (efx->phy_op->poll(efx))
1253 efx_link_status_changed(efx);
1254 mutex_unlock(&efx->mac_lock);
1255 }
Ben Hutchings55edc6e2009-11-25 16:11:35 +00001256
Ben Hutchingsef2b90e2009-11-29 03:42:31 +00001257 efx->type->start_stats(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001258}
1259
1260/* Flush all delayed work. Should only be called when no more delayed work
1261 * will be scheduled. This doesn't flush pending online resets (efx_reset),
1262 * since we're holding the rtnl_lock at this point. */
1263static void efx_flush_all(struct efx_nic *efx)
1264{
Ben Hutchings8ceee662008-04-27 12:55:59 +01001265 /* Make sure the hardware monitor is stopped */
1266 cancel_delayed_work_sync(&efx->monitor_work);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001267 /* Stop scheduled port reconfigurations */
Ben Hutchings766ca0f2008-12-12 21:59:24 -08001268 cancel_work_sync(&efx->mac_work);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001269}
1270
1271/* Quiesce hardware and software without bringing the link down.
1272 * Safe to call multiple times, when the nic and interface is in any
1273 * state. The caller is guaranteed to subsequently be in a position
1274 * to modify any hardware and software state they see fit without
1275 * taking locks. */
1276static void efx_stop_all(struct efx_nic *efx)
1277{
1278 struct efx_channel *channel;
1279
1280 EFX_ASSERT_RESET_SERIALISED(efx);
1281
1282 /* port_enabled can be read safely under the rtnl lock */
1283 if (!efx->port_enabled)
1284 return;
1285
Ben Hutchingsef2b90e2009-11-29 03:42:31 +00001286 efx->type->stop_stats(efx);
Ben Hutchings55edc6e2009-11-25 16:11:35 +00001287
Ben Hutchings8880f4e2009-11-29 15:15:41 +00001288 /* Switch to MCDI polling on Siena before disabling interrupts */
1289 efx_mcdi_mode_poll(efx);
1290
Ben Hutchings8ceee662008-04-27 12:55:59 +01001291 /* Disable interrupts and wait for ISR to complete */
Ben Hutchings152b6a62009-11-29 03:43:56 +00001292 efx_nic_disable_interrupts(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001293 if (efx->legacy_irq)
1294 synchronize_irq(efx->legacy_irq);
Ben Hutchings64ee3122008-09-01 12:47:38 +01001295 efx_for_each_channel(channel, efx) {
Ben Hutchings8ceee662008-04-27 12:55:59 +01001296 if (channel->irq)
1297 synchronize_irq(channel->irq);
Ben Hutchingsb3475642008-05-16 21:15:49 +01001298 }
Ben Hutchings8ceee662008-04-27 12:55:59 +01001299
1300 /* Stop all NAPI processing and synchronous rx refills */
1301 efx_for_each_channel(channel, efx)
1302 efx_stop_channel(channel);
1303
1304 /* Stop all asynchronous port reconfigurations. Since all
1305 * event processing has already been stopped, there is no
1306 * window to loose phy events */
1307 efx_stop_port(efx);
1308
Steve Hodgsonfdaa9ae2009-11-28 05:34:05 +00001309 /* Flush efx_mac_work(), refill_workqueue, monitor_work */
Ben Hutchings8ceee662008-04-27 12:55:59 +01001310 efx_flush_all(efx);
1311
Ben Hutchings8ceee662008-04-27 12:55:59 +01001312 /* Stop the kernel transmit interface late, so the watchdog
1313 * timer isn't ticking over the flush */
Ben Hutchings55668612008-05-16 21:16:10 +01001314 if (efx_dev_registered(efx)) {
Ben Hutchingsa4900ac2010-04-28 09:30:43 +00001315 struct efx_channel *channel;
1316 efx_for_each_channel(channel, efx)
1317 efx_stop_queue(channel);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001318 netif_tx_lock_bh(efx->net_dev);
1319 netif_tx_unlock_bh(efx->net_dev);
1320 }
1321}
1322
1323static void efx_remove_all(struct efx_nic *efx)
1324{
1325 struct efx_channel *channel;
1326
1327 efx_for_each_channel(channel, efx)
1328 efx_remove_channel(channel);
1329 efx_remove_port(efx);
1330 efx_remove_nic(efx);
1331}
1332
Ben Hutchings8ceee662008-04-27 12:55:59 +01001333/**************************************************************************
1334 *
1335 * Interrupt moderation
1336 *
1337 **************************************************************************/
1338
Ben Hutchings0d86ebd2009-10-23 08:32:13 +00001339static unsigned irq_mod_ticks(int usecs, int resolution)
1340{
1341 if (usecs <= 0)
1342 return 0; /* cannot receive interrupts ahead of time :-) */
1343 if (usecs < resolution)
1344 return 1; /* never round down to 0 */
1345 return usecs / resolution;
1346}
1347
Ben Hutchings8ceee662008-04-27 12:55:59 +01001348/* Set interrupt moderation parameters */
Ben Hutchings6fb70fd2009-03-20 13:30:37 +00001349void efx_init_irq_moderation(struct efx_nic *efx, int tx_usecs, int rx_usecs,
1350 bool rx_adaptive)
Ben Hutchings8ceee662008-04-27 12:55:59 +01001351{
1352 struct efx_tx_queue *tx_queue;
1353 struct efx_rx_queue *rx_queue;
Ben Hutchings152b6a62009-11-29 03:43:56 +00001354 unsigned tx_ticks = irq_mod_ticks(tx_usecs, EFX_IRQ_MOD_RESOLUTION);
1355 unsigned rx_ticks = irq_mod_ticks(rx_usecs, EFX_IRQ_MOD_RESOLUTION);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001356
1357 EFX_ASSERT_RESET_SERIALISED(efx);
1358
1359 efx_for_each_tx_queue(tx_queue, efx)
Ben Hutchings0d86ebd2009-10-23 08:32:13 +00001360 tx_queue->channel->irq_moderation = tx_ticks;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001361
Ben Hutchings6fb70fd2009-03-20 13:30:37 +00001362 efx->irq_rx_adaptive = rx_adaptive;
Ben Hutchings0d86ebd2009-10-23 08:32:13 +00001363 efx->irq_rx_moderation = rx_ticks;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001364 efx_for_each_rx_queue(rx_queue, efx)
Ben Hutchings0d86ebd2009-10-23 08:32:13 +00001365 rx_queue->channel->irq_moderation = rx_ticks;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001366}
1367
1368/**************************************************************************
1369 *
1370 * Hardware monitor
1371 *
1372 **************************************************************************/
1373
1374/* Run periodically off the general workqueue. Serialised against
1375 * efx_reconfigure_port via the mac_lock */
1376static void efx_monitor(struct work_struct *data)
1377{
1378 struct efx_nic *efx = container_of(data, struct efx_nic,
1379 monitor_work.work);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001380
Ben Hutchings62776d02010-06-23 11:30:07 +00001381 netif_vdbg(efx, timer, efx->net_dev,
1382 "hardware monitor executing on CPU %d\n",
1383 raw_smp_processor_id());
Ben Hutchingsef2b90e2009-11-29 03:42:31 +00001384 BUG_ON(efx->type->monitor == NULL);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001385
Ben Hutchings8ceee662008-04-27 12:55:59 +01001386 /* If the mac_lock is already held then it is likely a port
1387 * reconfiguration is already in place, which will likely do
1388 * most of the work of check_hw() anyway. */
Ben Hutchings766ca0f2008-12-12 21:59:24 -08001389 if (!mutex_trylock(&efx->mac_lock))
1390 goto out_requeue;
1391 if (!efx->port_enabled)
1392 goto out_unlock;
Ben Hutchingsef2b90e2009-11-29 03:42:31 +00001393 efx->type->monitor(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001394
Ben Hutchings766ca0f2008-12-12 21:59:24 -08001395out_unlock:
Ben Hutchings8ceee662008-04-27 12:55:59 +01001396 mutex_unlock(&efx->mac_lock);
Ben Hutchings766ca0f2008-12-12 21:59:24 -08001397out_requeue:
Ben Hutchings8ceee662008-04-27 12:55:59 +01001398 queue_delayed_work(efx->workqueue, &efx->monitor_work,
1399 efx_monitor_interval);
1400}
1401
1402/**************************************************************************
1403 *
1404 * ioctls
1405 *
1406 *************************************************************************/
1407
1408/* Net device ioctl
1409 * Context: process, rtnl_lock() held.
1410 */
1411static int efx_ioctl(struct net_device *net_dev, struct ifreq *ifr, int cmd)
1412{
Ben Hutchings767e4682008-09-01 12:43:14 +01001413 struct efx_nic *efx = netdev_priv(net_dev);
Ben Hutchings68e7f452009-04-29 08:05:08 +00001414 struct mii_ioctl_data *data = if_mii(ifr);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001415
1416 EFX_ASSERT_RESET_SERIALISED(efx);
1417
Ben Hutchings68e7f452009-04-29 08:05:08 +00001418 /* Convert phy_id from older PRTAD/DEVAD format */
1419 if ((cmd == SIOCGMIIREG || cmd == SIOCSMIIREG) &&
1420 (data->phy_id & 0xfc00) == 0x0400)
1421 data->phy_id ^= MDIO_PHY_ID_C45 | 0x0400;
1422
1423 return mdio_mii_ioctl(&efx->mdio, data, cmd);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001424}
1425
1426/**************************************************************************
1427 *
1428 * NAPI interface
1429 *
1430 **************************************************************************/
1431
1432static int efx_init_napi(struct efx_nic *efx)
1433{
1434 struct efx_channel *channel;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001435
1436 efx_for_each_channel(channel, efx) {
1437 channel->napi_dev = efx->net_dev;
Ben Hutchings718cff12009-04-14 19:47:46 -07001438 netif_napi_add(channel->napi_dev, &channel->napi_str,
1439 efx_poll, napi_weight);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001440 }
1441 return 0;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001442}
1443
1444static void efx_fini_napi(struct efx_nic *efx)
1445{
1446 struct efx_channel *channel;
1447
1448 efx_for_each_channel(channel, efx) {
Ben Hutchings718cff12009-04-14 19:47:46 -07001449 if (channel->napi_dev)
1450 netif_napi_del(&channel->napi_str);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001451 channel->napi_dev = NULL;
1452 }
1453}
1454
1455/**************************************************************************
1456 *
1457 * Kernel netpoll interface
1458 *
1459 *************************************************************************/
1460
1461#ifdef CONFIG_NET_POLL_CONTROLLER
1462
1463/* Although in the common case interrupts will be disabled, this is not
1464 * guaranteed. However, all our work happens inside the NAPI callback,
1465 * so no locking is required.
1466 */
1467static void efx_netpoll(struct net_device *net_dev)
1468{
Ben Hutchings767e4682008-09-01 12:43:14 +01001469 struct efx_nic *efx = netdev_priv(net_dev);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001470 struct efx_channel *channel;
1471
Ben Hutchings64ee3122008-09-01 12:47:38 +01001472 efx_for_each_channel(channel, efx)
Ben Hutchings8ceee662008-04-27 12:55:59 +01001473 efx_schedule_channel(channel);
1474}
1475
1476#endif
1477
1478/**************************************************************************
1479 *
1480 * Kernel net device interface
1481 *
1482 *************************************************************************/
1483
1484/* Context: process, rtnl_lock() held. */
1485static int efx_net_open(struct net_device *net_dev)
1486{
Ben Hutchings767e4682008-09-01 12:43:14 +01001487 struct efx_nic *efx = netdev_priv(net_dev);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001488 EFX_ASSERT_RESET_SERIALISED(efx);
1489
Ben Hutchings62776d02010-06-23 11:30:07 +00001490 netif_dbg(efx, ifup, efx->net_dev, "opening device on CPU %d\n",
1491 raw_smp_processor_id());
Ben Hutchings8ceee662008-04-27 12:55:59 +01001492
Ben Hutchingsf4bd9542008-12-26 13:48:51 -08001493 if (efx->state == STATE_DISABLED)
1494 return -EIO;
Ben Hutchingsf8b87c12008-09-01 12:48:17 +01001495 if (efx->phy_mode & PHY_MODE_SPECIAL)
1496 return -EBUSY;
Ben Hutchings8880f4e2009-11-29 15:15:41 +00001497 if (efx_mcdi_poll_reboot(efx) && efx_reset(efx, RESET_TYPE_ALL))
1498 return -EIO;
Ben Hutchingsf8b87c12008-09-01 12:48:17 +01001499
Steve Hodgson78c1f0a2009-11-29 03:43:00 +00001500 /* Notify the kernel of the link state polled during driver load,
1501 * before the monitor starts running */
1502 efx_link_status_changed(efx);
1503
Ben Hutchings8ceee662008-04-27 12:55:59 +01001504 efx_start_all(efx);
1505 return 0;
1506}
1507
1508/* Context: process, rtnl_lock() held.
1509 * Note that the kernel will ignore our return code; this method
1510 * should really be a void.
1511 */
1512static int efx_net_stop(struct net_device *net_dev)
1513{
Ben Hutchings767e4682008-09-01 12:43:14 +01001514 struct efx_nic *efx = netdev_priv(net_dev);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001515
Ben Hutchings62776d02010-06-23 11:30:07 +00001516 netif_dbg(efx, ifdown, efx->net_dev, "closing on CPU %d\n",
1517 raw_smp_processor_id());
Ben Hutchings8ceee662008-04-27 12:55:59 +01001518
Ben Hutchingsf4bd9542008-12-26 13:48:51 -08001519 if (efx->state != STATE_DISABLED) {
1520 /* Stop the device and flush all the channels */
1521 efx_stop_all(efx);
1522 efx_fini_channels(efx);
1523 efx_init_channels(efx);
1524 }
Ben Hutchings8ceee662008-04-27 12:55:59 +01001525
1526 return 0;
1527}
1528
Ben Hutchings5b9e2072008-05-16 21:18:14 +01001529/* Context: process, dev_base_lock or RTNL held, non-blocking. */
Ben Hutchings44727022010-06-08 07:21:12 +00001530static struct rtnl_link_stats64 *efx_net_stats(struct net_device *net_dev)
Ben Hutchings8ceee662008-04-27 12:55:59 +01001531{
Ben Hutchings767e4682008-09-01 12:43:14 +01001532 struct efx_nic *efx = netdev_priv(net_dev);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001533 struct efx_mac_stats *mac_stats = &efx->mac_stats;
Ben Hutchings44727022010-06-08 07:21:12 +00001534 struct rtnl_link_stats64 *stats = &net_dev->stats64;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001535
Ben Hutchings55edc6e2009-11-25 16:11:35 +00001536 spin_lock_bh(&efx->stats_lock);
Ben Hutchingsef2b90e2009-11-29 03:42:31 +00001537 efx->type->update_stats(efx);
Ben Hutchings55edc6e2009-11-25 16:11:35 +00001538 spin_unlock_bh(&efx->stats_lock);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001539
1540 stats->rx_packets = mac_stats->rx_packets;
1541 stats->tx_packets = mac_stats->tx_packets;
1542 stats->rx_bytes = mac_stats->rx_bytes;
1543 stats->tx_bytes = mac_stats->tx_bytes;
1544 stats->multicast = mac_stats->rx_multicast;
1545 stats->collisions = mac_stats->tx_collision;
1546 stats->rx_length_errors = (mac_stats->rx_gtjumbo +
1547 mac_stats->rx_length_error);
1548 stats->rx_over_errors = efx->n_rx_nodesc_drop_cnt;
1549 stats->rx_crc_errors = mac_stats->rx_bad;
1550 stats->rx_frame_errors = mac_stats->rx_align_error;
1551 stats->rx_fifo_errors = mac_stats->rx_overflow;
1552 stats->rx_missed_errors = mac_stats->rx_missed;
1553 stats->tx_window_errors = mac_stats->tx_late_collision;
1554
1555 stats->rx_errors = (stats->rx_length_errors +
Ben Hutchings8ceee662008-04-27 12:55:59 +01001556 stats->rx_crc_errors +
1557 stats->rx_frame_errors +
Ben Hutchings8ceee662008-04-27 12:55:59 +01001558 mac_stats->rx_symbol_error);
1559 stats->tx_errors = (stats->tx_window_errors +
1560 mac_stats->tx_bad);
1561
1562 return stats;
1563}
1564
1565/* Context: netif_tx_lock held, BHs disabled. */
1566static void efx_watchdog(struct net_device *net_dev)
1567{
Ben Hutchings767e4682008-09-01 12:43:14 +01001568 struct efx_nic *efx = netdev_priv(net_dev);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001569
Ben Hutchings62776d02010-06-23 11:30:07 +00001570 netif_err(efx, tx_err, efx->net_dev,
1571 "TX stuck with port_enabled=%d: resetting channels\n",
1572 efx->port_enabled);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001573
Ben Hutchings739bb23d2008-11-04 20:35:36 +00001574 efx_schedule_reset(efx, RESET_TYPE_TX_WATCHDOG);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001575}
1576
1577
1578/* Context: process, rtnl_lock() held. */
1579static int efx_change_mtu(struct net_device *net_dev, int new_mtu)
1580{
Ben Hutchings767e4682008-09-01 12:43:14 +01001581 struct efx_nic *efx = netdev_priv(net_dev);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001582 int rc = 0;
1583
1584 EFX_ASSERT_RESET_SERIALISED(efx);
1585
1586 if (new_mtu > EFX_MAX_MTU)
1587 return -EINVAL;
1588
1589 efx_stop_all(efx);
1590
Ben Hutchings62776d02010-06-23 11:30:07 +00001591 netif_dbg(efx, drv, efx->net_dev, "changing MTU to %d\n", new_mtu);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001592
1593 efx_fini_channels(efx);
Ben Hutchingsd3245b22009-11-29 03:42:41 +00001594
1595 mutex_lock(&efx->mac_lock);
1596 /* Reconfigure the MAC before enabling the dma queues so that
1597 * the RX buffers don't overflow */
Ben Hutchings8ceee662008-04-27 12:55:59 +01001598 net_dev->mtu = new_mtu;
Ben Hutchingsd3245b22009-11-29 03:42:41 +00001599 efx->mac_op->reconfigure(efx);
1600 mutex_unlock(&efx->mac_lock);
1601
Ben Hutchingsbc3c90a2008-09-01 12:48:46 +01001602 efx_init_channels(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001603
1604 efx_start_all(efx);
1605 return rc;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001606}
1607
1608static int efx_set_mac_address(struct net_device *net_dev, void *data)
1609{
Ben Hutchings767e4682008-09-01 12:43:14 +01001610 struct efx_nic *efx = netdev_priv(net_dev);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001611 struct sockaddr *addr = data;
1612 char *new_addr = addr->sa_data;
1613
1614 EFX_ASSERT_RESET_SERIALISED(efx);
1615
1616 if (!is_valid_ether_addr(new_addr)) {
Ben Hutchings62776d02010-06-23 11:30:07 +00001617 netif_err(efx, drv, efx->net_dev,
1618 "invalid ethernet MAC address requested: %pM\n",
1619 new_addr);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001620 return -EINVAL;
1621 }
1622
1623 memcpy(net_dev->dev_addr, new_addr, net_dev->addr_len);
1624
1625 /* Reconfigure the MAC */
Ben Hutchingsd3245b22009-11-29 03:42:41 +00001626 mutex_lock(&efx->mac_lock);
1627 efx->mac_op->reconfigure(efx);
1628 mutex_unlock(&efx->mac_lock);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001629
1630 return 0;
1631}
1632
Ben Hutchingsa816f752008-09-01 12:49:12 +01001633/* Context: netif_addr_lock held, BHs disabled. */
Ben Hutchings8ceee662008-04-27 12:55:59 +01001634static void efx_set_multicast_list(struct net_device *net_dev)
1635{
Ben Hutchings767e4682008-09-01 12:43:14 +01001636 struct efx_nic *efx = netdev_priv(net_dev);
Jiri Pirko22bedad32010-04-01 21:22:57 +00001637 struct netdev_hw_addr *ha;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001638 union efx_multicast_hash *mc_hash = &efx->multicast_hash;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001639 u32 crc;
1640 int bit;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001641
Ben Hutchings8be4f3e2009-11-25 16:12:16 +00001642 efx->promiscuous = !!(net_dev->flags & IFF_PROMISC);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001643
1644 /* Build multicast hash table */
Ben Hutchings8be4f3e2009-11-25 16:12:16 +00001645 if (efx->promiscuous || (net_dev->flags & IFF_ALLMULTI)) {
Ben Hutchings8ceee662008-04-27 12:55:59 +01001646 memset(mc_hash, 0xff, sizeof(*mc_hash));
1647 } else {
1648 memset(mc_hash, 0x00, sizeof(*mc_hash));
Jiri Pirko22bedad32010-04-01 21:22:57 +00001649 netdev_for_each_mc_addr(ha, net_dev) {
1650 crc = ether_crc_le(ETH_ALEN, ha->addr);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001651 bit = crc & (EFX_MCAST_HASH_ENTRIES - 1);
1652 set_bit_le(bit, mc_hash->byte);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001653 }
Ben Hutchings8be4f3e2009-11-25 16:12:16 +00001654
1655 /* Broadcast packets go through the multicast hash filter.
1656 * ether_crc_le() of the broadcast address is 0xbe2612ff
1657 * so we always add bit 0xff to the mask.
1658 */
1659 set_bit_le(0xff, mc_hash->byte);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001660 }
1661
Ben Hutchings8be4f3e2009-11-25 16:12:16 +00001662 if (efx->port_enabled)
1663 queue_work(efx->workqueue, &efx->mac_work);
1664 /* Otherwise efx_start_port() will do this */
Ben Hutchings8ceee662008-04-27 12:55:59 +01001665}
1666
Stephen Hemmingerc3ecb9f2008-11-21 17:32:54 -08001667static const struct net_device_ops efx_netdev_ops = {
1668 .ndo_open = efx_net_open,
1669 .ndo_stop = efx_net_stop,
Ben Hutchings44727022010-06-08 07:21:12 +00001670 .ndo_get_stats64 = efx_net_stats,
Stephen Hemmingerc3ecb9f2008-11-21 17:32:54 -08001671 .ndo_tx_timeout = efx_watchdog,
1672 .ndo_start_xmit = efx_hard_start_xmit,
1673 .ndo_validate_addr = eth_validate_addr,
1674 .ndo_do_ioctl = efx_ioctl,
1675 .ndo_change_mtu = efx_change_mtu,
1676 .ndo_set_mac_address = efx_set_mac_address,
1677 .ndo_set_multicast_list = efx_set_multicast_list,
1678#ifdef CONFIG_NET_POLL_CONTROLLER
1679 .ndo_poll_controller = efx_netpoll,
1680#endif
1681};
1682
Ben Hutchings7dde5962008-12-12 22:09:38 -08001683static void efx_update_name(struct efx_nic *efx)
1684{
1685 strcpy(efx->name, efx->net_dev->name);
1686 efx_mtd_rename(efx);
1687 efx_set_channel_names(efx);
1688}
1689
Ben Hutchings8ceee662008-04-27 12:55:59 +01001690static int efx_netdev_event(struct notifier_block *this,
1691 unsigned long event, void *ptr)
1692{
Ben Hutchingsd3208b52008-05-16 21:20:00 +01001693 struct net_device *net_dev = ptr;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001694
Ben Hutchings7dde5962008-12-12 22:09:38 -08001695 if (net_dev->netdev_ops == &efx_netdev_ops &&
1696 event == NETDEV_CHANGENAME)
1697 efx_update_name(netdev_priv(net_dev));
Ben Hutchings8ceee662008-04-27 12:55:59 +01001698
1699 return NOTIFY_DONE;
1700}
1701
1702static struct notifier_block efx_netdev_notifier = {
1703 .notifier_call = efx_netdev_event,
1704};
1705
Ben Hutchings06d5e192008-12-12 21:47:23 -08001706static ssize_t
1707show_phy_type(struct device *dev, struct device_attribute *attr, char *buf)
1708{
1709 struct efx_nic *efx = pci_get_drvdata(to_pci_dev(dev));
1710 return sprintf(buf, "%d\n", efx->phy_type);
1711}
1712static DEVICE_ATTR(phy_type, 0644, show_phy_type, NULL);
1713
Ben Hutchings8ceee662008-04-27 12:55:59 +01001714static int efx_register_netdev(struct efx_nic *efx)
1715{
1716 struct net_device *net_dev = efx->net_dev;
1717 int rc;
1718
1719 net_dev->watchdog_timeo = 5 * HZ;
1720 net_dev->irq = efx->pci_dev->irq;
Stephen Hemmingerc3ecb9f2008-11-21 17:32:54 -08001721 net_dev->netdev_ops = &efx_netdev_ops;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001722 SET_ETHTOOL_OPS(net_dev, &efx_ethtool_ops);
1723
Ben Hutchings8ceee662008-04-27 12:55:59 +01001724 /* Clear MAC statistics */
Ben Hutchings177dfcd2008-12-12 21:50:08 -08001725 efx->mac_op->update_stats(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001726 memset(&efx->mac_stats, 0, sizeof(efx->mac_stats));
1727
Ben Hutchings7dde5962008-12-12 22:09:38 -08001728 rtnl_lock();
Ben Hutchingsaed06282009-08-26 08:16:27 +00001729
1730 rc = dev_alloc_name(net_dev, net_dev->name);
1731 if (rc < 0)
1732 goto fail_locked;
Ben Hutchings7dde5962008-12-12 22:09:38 -08001733 efx_update_name(efx);
Ben Hutchingsaed06282009-08-26 08:16:27 +00001734
1735 rc = register_netdevice(net_dev);
1736 if (rc)
1737 goto fail_locked;
1738
1739 /* Always start with carrier off; PHY events will detect the link */
1740 netif_carrier_off(efx->net_dev);
1741
Ben Hutchings7dde5962008-12-12 22:09:38 -08001742 rtnl_unlock();
Ben Hutchings8ceee662008-04-27 12:55:59 +01001743
Ben Hutchings06d5e192008-12-12 21:47:23 -08001744 rc = device_create_file(&efx->pci_dev->dev, &dev_attr_phy_type);
1745 if (rc) {
Ben Hutchings62776d02010-06-23 11:30:07 +00001746 netif_err(efx, drv, efx->net_dev,
1747 "failed to init net dev attributes\n");
Ben Hutchings06d5e192008-12-12 21:47:23 -08001748 goto fail_registered;
1749 }
1750
Ben Hutchings8ceee662008-04-27 12:55:59 +01001751 return 0;
Ben Hutchings06d5e192008-12-12 21:47:23 -08001752
Ben Hutchingsaed06282009-08-26 08:16:27 +00001753fail_locked:
1754 rtnl_unlock();
Ben Hutchings62776d02010-06-23 11:30:07 +00001755 netif_err(efx, drv, efx->net_dev, "could not register net dev\n");
Ben Hutchingsaed06282009-08-26 08:16:27 +00001756 return rc;
1757
Ben Hutchings06d5e192008-12-12 21:47:23 -08001758fail_registered:
1759 unregister_netdev(net_dev);
1760 return rc;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001761}
1762
1763static void efx_unregister_netdev(struct efx_nic *efx)
1764{
1765 struct efx_tx_queue *tx_queue;
1766
1767 if (!efx->net_dev)
1768 return;
1769
Ben Hutchings767e4682008-09-01 12:43:14 +01001770 BUG_ON(netdev_priv(efx->net_dev) != efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001771
1772 /* Free up any skbs still remaining. This has to happen before
1773 * we try to unregister the netdev as running their destructors
1774 * may be needed to get the device ref. count to 0. */
1775 efx_for_each_tx_queue(tx_queue, efx)
1776 efx_release_tx_buffers(tx_queue);
1777
Ben Hutchings55668612008-05-16 21:16:10 +01001778 if (efx_dev_registered(efx)) {
Ben Hutchings8ceee662008-04-27 12:55:59 +01001779 strlcpy(efx->name, pci_name(efx->pci_dev), sizeof(efx->name));
Ben Hutchings06d5e192008-12-12 21:47:23 -08001780 device_remove_file(&efx->pci_dev->dev, &dev_attr_phy_type);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001781 unregister_netdev(efx->net_dev);
1782 }
1783}
1784
1785/**************************************************************************
1786 *
1787 * Device reset and suspend
1788 *
1789 **************************************************************************/
1790
Ben Hutchings2467ca42008-09-01 12:48:50 +01001791/* Tears down the entire software state and most of the hardware state
1792 * before reset. */
Ben Hutchingsd3245b22009-11-29 03:42:41 +00001793void efx_reset_down(struct efx_nic *efx, enum reset_type method)
Ben Hutchings8ceee662008-04-27 12:55:59 +01001794{
Ben Hutchings8ceee662008-04-27 12:55:59 +01001795 EFX_ASSERT_RESET_SERIALISED(efx);
1796
Ben Hutchings2467ca42008-09-01 12:48:50 +01001797 efx_stop_all(efx);
1798 mutex_lock(&efx->mac_lock);
Ben Hutchingsf4150722008-11-04 20:34:28 +00001799 mutex_lock(&efx->spi_lock);
Ben Hutchings2467ca42008-09-01 12:48:50 +01001800
Ben Hutchings8ceee662008-04-27 12:55:59 +01001801 efx_fini_channels(efx);
Steve Hodgson4b988282009-01-29 17:50:51 +00001802 if (efx->port_initialized && method != RESET_TYPE_INVISIBLE)
1803 efx->phy_op->fini(efx);
Ben Hutchingsef2b90e2009-11-29 03:42:31 +00001804 efx->type->fini(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001805}
1806
Ben Hutchings2467ca42008-09-01 12:48:50 +01001807/* This function will always ensure that the locks acquired in
1808 * efx_reset_down() are released. A failure return code indicates
1809 * that we were unable to reinitialise the hardware, and the
1810 * driver should be disabled. If ok is false, then the rx and tx
1811 * engines are not restarted, pending a RESET_DISABLE. */
Ben Hutchingsd3245b22009-11-29 03:42:41 +00001812int efx_reset_up(struct efx_nic *efx, enum reset_type method, bool ok)
Ben Hutchings8ceee662008-04-27 12:55:59 +01001813{
1814 int rc;
1815
Ben Hutchings2467ca42008-09-01 12:48:50 +01001816 EFX_ASSERT_RESET_SERIALISED(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001817
Ben Hutchingsef2b90e2009-11-29 03:42:31 +00001818 rc = efx->type->init(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001819 if (rc) {
Ben Hutchings62776d02010-06-23 11:30:07 +00001820 netif_err(efx, drv, efx->net_dev, "failed to initialise NIC\n");
Ben Hutchingseb9f6742009-11-29 03:43:15 +00001821 goto fail;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001822 }
1823
Ben Hutchingseb9f6742009-11-29 03:43:15 +00001824 if (!ok)
1825 goto fail;
1826
Steve Hodgson4b988282009-01-29 17:50:51 +00001827 if (efx->port_initialized && method != RESET_TYPE_INVISIBLE) {
Ben Hutchingseb9f6742009-11-29 03:43:15 +00001828 rc = efx->phy_op->init(efx);
1829 if (rc)
1830 goto fail;
1831 if (efx->phy_op->reconfigure(efx))
Ben Hutchings62776d02010-06-23 11:30:07 +00001832 netif_err(efx, drv, efx->net_dev,
1833 "could not restore PHY settings\n");
Steve Hodgson4b988282009-01-29 17:50:51 +00001834 }
1835
Ben Hutchingseb9f6742009-11-29 03:43:15 +00001836 efx->mac_op->reconfigure(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001837
Ben Hutchingseb9f6742009-11-29 03:43:15 +00001838 efx_init_channels(efx);
Ben Hutchings2467ca42008-09-01 12:48:50 +01001839
Ben Hutchingsf4150722008-11-04 20:34:28 +00001840 mutex_unlock(&efx->spi_lock);
Ben Hutchings2467ca42008-09-01 12:48:50 +01001841 mutex_unlock(&efx->mac_lock);
1842
Ben Hutchingseb9f6742009-11-29 03:43:15 +00001843 efx_start_all(efx);
1844
1845 return 0;
1846
1847fail:
1848 efx->port_initialized = false;
1849
1850 mutex_unlock(&efx->spi_lock);
1851 mutex_unlock(&efx->mac_lock);
1852
Ben Hutchings8ceee662008-04-27 12:55:59 +01001853 return rc;
1854}
1855
Ben Hutchingseb9f6742009-11-29 03:43:15 +00001856/* Reset the NIC using the specified method. Note that the reset may
1857 * fail, in which case the card will be left in an unusable state.
Ben Hutchings8ceee662008-04-27 12:55:59 +01001858 *
Ben Hutchingseb9f6742009-11-29 03:43:15 +00001859 * Caller must hold the rtnl_lock.
Ben Hutchings8ceee662008-04-27 12:55:59 +01001860 */
Ben Hutchingseb9f6742009-11-29 03:43:15 +00001861int efx_reset(struct efx_nic *efx, enum reset_type method)
Ben Hutchings8ceee662008-04-27 12:55:59 +01001862{
Ben Hutchingseb9f6742009-11-29 03:43:15 +00001863 int rc, rc2;
1864 bool disabled;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001865
Ben Hutchings62776d02010-06-23 11:30:07 +00001866 netif_info(efx, drv, efx->net_dev, "resetting (%s)\n",
1867 RESET_TYPE(method));
Ben Hutchings8ceee662008-04-27 12:55:59 +01001868
Ben Hutchingsd3245b22009-11-29 03:42:41 +00001869 efx_reset_down(efx, method);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001870
Ben Hutchingsef2b90e2009-11-29 03:42:31 +00001871 rc = efx->type->reset(efx, method);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001872 if (rc) {
Ben Hutchings62776d02010-06-23 11:30:07 +00001873 netif_err(efx, drv, efx->net_dev, "failed to reset hardware\n");
Ben Hutchingseb9f6742009-11-29 03:43:15 +00001874 goto out;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001875 }
1876
1877 /* Allow resets to be rescheduled. */
1878 efx->reset_pending = RESET_TYPE_NONE;
1879
1880 /* Reinitialise bus-mastering, which may have been turned off before
1881 * the reset was scheduled. This is still appropriate, even in the
1882 * RESET_TYPE_DISABLE since this driver generally assumes the hardware
1883 * can respond to requests. */
1884 pci_set_master(efx->pci_dev);
1885
Ben Hutchingseb9f6742009-11-29 03:43:15 +00001886out:
Ben Hutchings8ceee662008-04-27 12:55:59 +01001887 /* Leave device stopped if necessary */
Ben Hutchingseb9f6742009-11-29 03:43:15 +00001888 disabled = rc || method == RESET_TYPE_DISABLE;
1889 rc2 = efx_reset_up(efx, method, !disabled);
1890 if (rc2) {
1891 disabled = true;
1892 if (!rc)
1893 rc = rc2;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001894 }
1895
Ben Hutchingseb9f6742009-11-29 03:43:15 +00001896 if (disabled) {
Ben Hutchingsf49a4582010-04-28 09:01:33 +00001897 dev_close(efx->net_dev);
Ben Hutchings62776d02010-06-23 11:30:07 +00001898 netif_err(efx, drv, efx->net_dev, "has been disabled\n");
Ben Hutchingsf4bd9542008-12-26 13:48:51 -08001899 efx->state = STATE_DISABLED;
Ben Hutchingsf4bd9542008-12-26 13:48:51 -08001900 } else {
Ben Hutchings62776d02010-06-23 11:30:07 +00001901 netif_dbg(efx, drv, efx->net_dev, "reset complete\n");
Ben Hutchingsf4bd9542008-12-26 13:48:51 -08001902 }
Ben Hutchings8ceee662008-04-27 12:55:59 +01001903 return rc;
1904}
1905
1906/* The worker thread exists so that code that cannot sleep can
1907 * schedule a reset for later.
1908 */
1909static void efx_reset_work(struct work_struct *data)
1910{
Ben Hutchingseb9f6742009-11-29 03:43:15 +00001911 struct efx_nic *efx = container_of(data, struct efx_nic, reset_work);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001912
Steve Hodgson319ba642010-06-01 11:17:24 +00001913 if (efx->reset_pending == RESET_TYPE_NONE)
1914 return;
1915
Ben Hutchingseb9f6742009-11-29 03:43:15 +00001916 /* If we're not RUNNING then don't reset. Leave the reset_pending
1917 * flag set so that efx_pci_probe_main will be retried */
1918 if (efx->state != STATE_RUNNING) {
Ben Hutchings62776d02010-06-23 11:30:07 +00001919 netif_info(efx, drv, efx->net_dev,
1920 "scheduled reset quenched. NIC not RUNNING\n");
Ben Hutchingseb9f6742009-11-29 03:43:15 +00001921 return;
1922 }
1923
1924 rtnl_lock();
Ben Hutchingsf49a4582010-04-28 09:01:33 +00001925 (void)efx_reset(efx, efx->reset_pending);
Ben Hutchingseb9f6742009-11-29 03:43:15 +00001926 rtnl_unlock();
Ben Hutchings8ceee662008-04-27 12:55:59 +01001927}
1928
1929void efx_schedule_reset(struct efx_nic *efx, enum reset_type type)
1930{
1931 enum reset_type method;
1932
1933 if (efx->reset_pending != RESET_TYPE_NONE) {
Ben Hutchings62776d02010-06-23 11:30:07 +00001934 netif_info(efx, drv, efx->net_dev,
1935 "quenching already scheduled reset\n");
Ben Hutchings8ceee662008-04-27 12:55:59 +01001936 return;
1937 }
1938
1939 switch (type) {
1940 case RESET_TYPE_INVISIBLE:
1941 case RESET_TYPE_ALL:
1942 case RESET_TYPE_WORLD:
1943 case RESET_TYPE_DISABLE:
1944 method = type;
1945 break;
1946 case RESET_TYPE_RX_RECOVERY:
1947 case RESET_TYPE_RX_DESC_FETCH:
1948 case RESET_TYPE_TX_DESC_FETCH:
1949 case RESET_TYPE_TX_SKIP:
1950 method = RESET_TYPE_INVISIBLE;
1951 break;
Ben Hutchings8880f4e2009-11-29 15:15:41 +00001952 case RESET_TYPE_MC_FAILURE:
Ben Hutchings8ceee662008-04-27 12:55:59 +01001953 default:
1954 method = RESET_TYPE_ALL;
1955 break;
1956 }
1957
1958 if (method != type)
Ben Hutchings62776d02010-06-23 11:30:07 +00001959 netif_dbg(efx, drv, efx->net_dev,
1960 "scheduling %s reset for %s\n",
1961 RESET_TYPE(method), RESET_TYPE(type));
Ben Hutchings8ceee662008-04-27 12:55:59 +01001962 else
Ben Hutchings62776d02010-06-23 11:30:07 +00001963 netif_dbg(efx, drv, efx->net_dev, "scheduling %s reset\n",
1964 RESET_TYPE(method));
Ben Hutchings8ceee662008-04-27 12:55:59 +01001965
1966 efx->reset_pending = method;
1967
Ben Hutchings8880f4e2009-11-29 15:15:41 +00001968 /* efx_process_channel() will no longer read events once a
1969 * reset is scheduled. So switch back to poll'd MCDI completions. */
1970 efx_mcdi_mode_poll(efx);
1971
Steve Hodgson1ab00622008-12-12 21:33:02 -08001972 queue_work(reset_workqueue, &efx->reset_work);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001973}
1974
1975/**************************************************************************
1976 *
1977 * List of NICs we support
1978 *
1979 **************************************************************************/
1980
1981/* PCI device ID table */
Alexey Dobriyana3aa1882010-01-07 11:58:11 +00001982static DEFINE_PCI_DEVICE_TABLE(efx_pci_table) = {
Ben Hutchings8ceee662008-04-27 12:55:59 +01001983 {PCI_DEVICE(EFX_VENDID_SFC, FALCON_A_P_DEVID),
Ben Hutchingsdaeda632009-11-28 05:36:04 +00001984 .driver_data = (unsigned long) &falcon_a1_nic_type},
Ben Hutchings8ceee662008-04-27 12:55:59 +01001985 {PCI_DEVICE(EFX_VENDID_SFC, FALCON_B_P_DEVID),
Ben Hutchingsdaeda632009-11-28 05:36:04 +00001986 .driver_data = (unsigned long) &falcon_b0_nic_type},
Ben Hutchings8880f4e2009-11-29 15:15:41 +00001987 {PCI_DEVICE(EFX_VENDID_SFC, BETHPAGE_A_P_DEVID),
1988 .driver_data = (unsigned long) &siena_a0_nic_type},
1989 {PCI_DEVICE(EFX_VENDID_SFC, SIENA_A_P_DEVID),
1990 .driver_data = (unsigned long) &siena_a0_nic_type},
Ben Hutchings8ceee662008-04-27 12:55:59 +01001991 {0} /* end of list */
1992};
1993
1994/**************************************************************************
1995 *
Ben Hutchings37594332009-11-23 16:05:45 +00001996 * Dummy PHY/MAC operations
Ben Hutchings8ceee662008-04-27 12:55:59 +01001997 *
Ben Hutchings01aad7b2008-09-01 12:48:36 +01001998 * Can be used for some unimplemented operations
Ben Hutchings8ceee662008-04-27 12:55:59 +01001999 * Needed so all function pointers are valid and do not have to be tested
2000 * before use
2001 *
2002 **************************************************************************/
2003int efx_port_dummy_op_int(struct efx_nic *efx)
2004{
2005 return 0;
2006}
2007void efx_port_dummy_op_void(struct efx_nic *efx) {}
Ben Hutchings398468e2009-11-23 16:03:45 +00002008void efx_port_dummy_op_set_id_led(struct efx_nic *efx, enum efx_led_mode mode)
2009{
2010}
Steve Hodgsonfdaa9ae2009-11-28 05:34:05 +00002011bool efx_port_dummy_op_poll(struct efx_nic *efx)
2012{
2013 return false;
2014}
Ben Hutchings8ceee662008-04-27 12:55:59 +01002015
2016static struct efx_phy_operations efx_dummy_phy_operations = {
2017 .init = efx_port_dummy_op_int,
Ben Hutchingsd3245b22009-11-29 03:42:41 +00002018 .reconfigure = efx_port_dummy_op_int,
Steve Hodgsonfdaa9ae2009-11-28 05:34:05 +00002019 .poll = efx_port_dummy_op_poll,
Ben Hutchings8ceee662008-04-27 12:55:59 +01002020 .fini = efx_port_dummy_op_void,
Ben Hutchings8ceee662008-04-27 12:55:59 +01002021};
2022
Ben Hutchings8ceee662008-04-27 12:55:59 +01002023/**************************************************************************
2024 *
2025 * Data housekeeping
2026 *
2027 **************************************************************************/
2028
2029/* This zeroes out and then fills in the invariants in a struct
2030 * efx_nic (including all sub-structures).
2031 */
2032static int efx_init_struct(struct efx_nic *efx, struct efx_nic_type *type,
2033 struct pci_dev *pci_dev, struct net_device *net_dev)
2034{
2035 struct efx_channel *channel;
2036 struct efx_tx_queue *tx_queue;
2037 struct efx_rx_queue *rx_queue;
Steve Hodgson1ab00622008-12-12 21:33:02 -08002038 int i;
Ben Hutchings8ceee662008-04-27 12:55:59 +01002039
2040 /* Initialise common structures */
2041 memset(efx, 0, sizeof(*efx));
2042 spin_lock_init(&efx->biu_lock);
Steve Hodgsonab867462009-11-28 05:34:44 +00002043 mutex_init(&efx->mdio_lock);
Ben Hutchingsf4150722008-11-04 20:34:28 +00002044 mutex_init(&efx->spi_lock);
Ben Hutchings76884832009-11-29 15:10:44 +00002045#ifdef CONFIG_SFC_MTD
2046 INIT_LIST_HEAD(&efx->mtd_list);
2047#endif
Ben Hutchings8ceee662008-04-27 12:55:59 +01002048 INIT_WORK(&efx->reset_work, efx_reset_work);
2049 INIT_DELAYED_WORK(&efx->monitor_work, efx_monitor);
2050 efx->pci_dev = pci_dev;
Ben Hutchings62776d02010-06-23 11:30:07 +00002051 efx->msg_enable = debug;
Ben Hutchings8ceee662008-04-27 12:55:59 +01002052 efx->state = STATE_INIT;
2053 efx->reset_pending = RESET_TYPE_NONE;
2054 strlcpy(efx->name, pci_name(pci_dev), sizeof(efx->name));
Ben Hutchings8ceee662008-04-27 12:55:59 +01002055
2056 efx->net_dev = net_dev;
Ben Hutchingsdc8cfa52008-09-01 12:46:50 +01002057 efx->rx_checksum_enabled = true;
Ben Hutchings8ceee662008-04-27 12:55:59 +01002058 spin_lock_init(&efx->stats_lock);
2059 mutex_init(&efx->mac_lock);
Steve Hodgsonb895d732009-11-28 05:35:00 +00002060 efx->mac_op = type->default_mac_ops;
Ben Hutchings8ceee662008-04-27 12:55:59 +01002061 efx->phy_op = &efx_dummy_phy_operations;
Ben Hutchings68e7f452009-04-29 08:05:08 +00002062 efx->mdio.dev = net_dev;
Ben Hutchings766ca0f2008-12-12 21:59:24 -08002063 INIT_WORK(&efx->mac_work, efx_mac_work);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002064
2065 for (i = 0; i < EFX_MAX_CHANNELS; i++) {
2066 channel = &efx->channel[i];
2067 channel->efx = efx;
2068 channel->channel = i;
Ben Hutchingsdc8cfa52008-09-01 12:46:50 +01002069 channel->work_pending = false;
Ben Hutchingsa4900ac2010-04-28 09:30:43 +00002070 spin_lock_init(&channel->tx_stop_lock);
2071 atomic_set(&channel->tx_stop_count, 1);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002072 }
Ben Hutchingsa4900ac2010-04-28 09:30:43 +00002073 for (i = 0; i < EFX_MAX_TX_QUEUES; i++) {
Ben Hutchings8ceee662008-04-27 12:55:59 +01002074 tx_queue = &efx->tx_queue[i];
2075 tx_queue->efx = efx;
2076 tx_queue->queue = i;
2077 tx_queue->buffer = NULL;
2078 tx_queue->channel = &efx->channel[0]; /* for safety */
Ben Hutchingsb9b39b62008-05-07 12:51:12 +01002079 tx_queue->tso_headers_free = NULL;
Ben Hutchings8ceee662008-04-27 12:55:59 +01002080 }
2081 for (i = 0; i < EFX_MAX_RX_QUEUES; i++) {
2082 rx_queue = &efx->rx_queue[i];
2083 rx_queue->efx = efx;
2084 rx_queue->queue = i;
2085 rx_queue->channel = &efx->channel[0]; /* for safety */
2086 rx_queue->buffer = NULL;
Steve Hodgson90d683a2010-06-01 11:19:39 +00002087 setup_timer(&rx_queue->slow_fill, efx_rx_slow_fill,
2088 (unsigned long)rx_queue);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002089 }
2090
2091 efx->type = type;
2092
Ben Hutchings8ceee662008-04-27 12:55:59 +01002093 /* As close as we can get to guaranteeing that we don't overflow */
Ben Hutchings3ffeabd2009-10-23 08:30:58 +00002094 BUILD_BUG_ON(EFX_EVQ_SIZE < EFX_TXQ_SIZE + EFX_RXQ_SIZE);
2095
Ben Hutchings8ceee662008-04-27 12:55:59 +01002096 EFX_BUG_ON_PARANOID(efx->type->phys_addr_channels > EFX_MAX_CHANNELS);
2097
2098 /* Higher numbered interrupt modes are less capable! */
2099 efx->interrupt_mode = max(efx->type->max_interrupt_mode,
2100 interrupt_mode);
2101
Ben Hutchings6977dc62008-12-26 13:44:39 -08002102 /* Would be good to use the net_dev name, but we're too early */
2103 snprintf(efx->workqueue_name, sizeof(efx->workqueue_name), "sfc%s",
2104 pci_name(pci_dev));
2105 efx->workqueue = create_singlethread_workqueue(efx->workqueue_name);
Steve Hodgson1ab00622008-12-12 21:33:02 -08002106 if (!efx->workqueue)
2107 return -ENOMEM;
Ben Hutchings8d9853d2008-07-18 19:01:20 +01002108
Ben Hutchings8ceee662008-04-27 12:55:59 +01002109 return 0;
Ben Hutchings8ceee662008-04-27 12:55:59 +01002110}
2111
2112static void efx_fini_struct(struct efx_nic *efx)
2113{
2114 if (efx->workqueue) {
2115 destroy_workqueue(efx->workqueue);
2116 efx->workqueue = NULL;
2117 }
2118}
2119
2120/**************************************************************************
2121 *
2122 * PCI interface
2123 *
2124 **************************************************************************/
2125
2126/* Main body of final NIC shutdown code
2127 * This is called only at module unload (or hotplug removal).
2128 */
2129static void efx_pci_remove_main(struct efx_nic *efx)
2130{
Ben Hutchings152b6a62009-11-29 03:43:56 +00002131 efx_nic_fini_interrupt(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002132 efx_fini_channels(efx);
2133 efx_fini_port(efx);
Ben Hutchingsef2b90e2009-11-29 03:42:31 +00002134 efx->type->fini(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002135 efx_fini_napi(efx);
2136 efx_remove_all(efx);
2137}
2138
2139/* Final NIC shutdown
2140 * This is called only at module unload (or hotplug removal).
2141 */
2142static void efx_pci_remove(struct pci_dev *pci_dev)
2143{
2144 struct efx_nic *efx;
2145
2146 efx = pci_get_drvdata(pci_dev);
2147 if (!efx)
2148 return;
2149
2150 /* Mark the NIC as fini, then stop the interface */
2151 rtnl_lock();
2152 efx->state = STATE_FINI;
2153 dev_close(efx->net_dev);
2154
2155 /* Allow any queued efx_resets() to complete */
2156 rtnl_unlock();
2157
Ben Hutchings8ceee662008-04-27 12:55:59 +01002158 efx_unregister_netdev(efx);
2159
Ben Hutchings7dde5962008-12-12 22:09:38 -08002160 efx_mtd_remove(efx);
2161
Ben Hutchings8ceee662008-04-27 12:55:59 +01002162 /* Wait for any scheduled resets to complete. No more will be
2163 * scheduled from this point because efx_stop_all() has been
2164 * called, we are no longer registered with driverlink, and
2165 * the net_device's have been removed. */
Steve Hodgson1ab00622008-12-12 21:33:02 -08002166 cancel_work_sync(&efx->reset_work);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002167
2168 efx_pci_remove_main(efx);
2169
Ben Hutchings8ceee662008-04-27 12:55:59 +01002170 efx_fini_io(efx);
Ben Hutchings62776d02010-06-23 11:30:07 +00002171 netif_dbg(efx, drv, efx->net_dev, "shutdown successful\n");
Ben Hutchings8ceee662008-04-27 12:55:59 +01002172
2173 pci_set_drvdata(pci_dev, NULL);
2174 efx_fini_struct(efx);
2175 free_netdev(efx->net_dev);
2176};
2177
2178/* Main body of NIC initialisation
2179 * This is called at module load (or hotplug insertion, theoretically).
2180 */
2181static int efx_pci_probe_main(struct efx_nic *efx)
2182{
2183 int rc;
2184
2185 /* Do start-of-day initialisation */
2186 rc = efx_probe_all(efx);
2187 if (rc)
2188 goto fail1;
2189
2190 rc = efx_init_napi(efx);
2191 if (rc)
2192 goto fail2;
2193
Ben Hutchingsef2b90e2009-11-29 03:42:31 +00002194 rc = efx->type->init(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002195 if (rc) {
Ben Hutchings62776d02010-06-23 11:30:07 +00002196 netif_err(efx, probe, efx->net_dev,
2197 "failed to initialise NIC\n");
Ben Hutchings278c0622009-11-23 16:05:12 +00002198 goto fail3;
Ben Hutchings8ceee662008-04-27 12:55:59 +01002199 }
2200
2201 rc = efx_init_port(efx);
2202 if (rc) {
Ben Hutchings62776d02010-06-23 11:30:07 +00002203 netif_err(efx, probe, efx->net_dev,
2204 "failed to initialise port\n");
Ben Hutchings278c0622009-11-23 16:05:12 +00002205 goto fail4;
Ben Hutchings8ceee662008-04-27 12:55:59 +01002206 }
2207
Ben Hutchingsbc3c90a2008-09-01 12:48:46 +01002208 efx_init_channels(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002209
Ben Hutchings152b6a62009-11-29 03:43:56 +00002210 rc = efx_nic_init_interrupt(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002211 if (rc)
Ben Hutchings278c0622009-11-23 16:05:12 +00002212 goto fail5;
Ben Hutchings8ceee662008-04-27 12:55:59 +01002213
2214 return 0;
2215
Ben Hutchings278c0622009-11-23 16:05:12 +00002216 fail5:
Ben Hutchingsbc3c90a2008-09-01 12:48:46 +01002217 efx_fini_channels(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002218 efx_fini_port(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002219 fail4:
Ben Hutchingsef2b90e2009-11-29 03:42:31 +00002220 efx->type->fini(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002221 fail3:
2222 efx_fini_napi(efx);
2223 fail2:
2224 efx_remove_all(efx);
2225 fail1:
2226 return rc;
2227}
2228
2229/* NIC initialisation
2230 *
2231 * This is called at module load (or hotplug insertion,
2232 * theoretically). It sets up PCI mappings, tests and resets the NIC,
2233 * sets up and registers the network devices with the kernel and hooks
2234 * the interrupt service routine. It does not prepare the device for
2235 * transmission; this is left to the first time one of the network
2236 * interfaces is brought up (i.e. efx_net_open).
2237 */
2238static int __devinit efx_pci_probe(struct pci_dev *pci_dev,
2239 const struct pci_device_id *entry)
2240{
2241 struct efx_nic_type *type = (struct efx_nic_type *) entry->driver_data;
2242 struct net_device *net_dev;
2243 struct efx_nic *efx;
2244 int i, rc;
2245
2246 /* Allocate and initialise a struct net_device and struct efx_nic */
Ben Hutchingsa4900ac2010-04-28 09:30:43 +00002247 net_dev = alloc_etherdev_mq(sizeof(*efx), EFX_MAX_CORE_TX_QUEUES);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002248 if (!net_dev)
2249 return -ENOMEM;
Ben Hutchingsc383b532009-11-29 15:11:02 +00002250 net_dev->features |= (type->offload_features | NETIF_F_SG |
Ben Hutchings97bc5412009-05-19 16:19:08 -07002251 NETIF_F_HIGHDMA | NETIF_F_TSO |
2252 NETIF_F_GRO);
Ben Hutchings738a8f42009-11-29 15:16:05 +00002253 if (type->offload_features & NETIF_F_V6_CSUM)
2254 net_dev->features |= NETIF_F_TSO6;
Ben Hutchings285065632008-09-01 12:46:54 +01002255 /* Mask for features that also apply to VLAN devices */
2256 net_dev->vlan_features |= (NETIF_F_ALL_CSUM | NETIF_F_SG |
Ben Hutchings740847d2008-09-01 12:48:23 +01002257 NETIF_F_HIGHDMA | NETIF_F_TSO);
Ben Hutchings767e4682008-09-01 12:43:14 +01002258 efx = netdev_priv(net_dev);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002259 pci_set_drvdata(pci_dev, efx);
Ben Hutchings62776d02010-06-23 11:30:07 +00002260 SET_NETDEV_DEV(net_dev, &pci_dev->dev);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002261 rc = efx_init_struct(efx, type, pci_dev, net_dev);
2262 if (rc)
2263 goto fail1;
2264
Ben Hutchings62776d02010-06-23 11:30:07 +00002265 netif_info(efx, probe, efx->net_dev,
2266 "Solarflare Communications NIC detected\n");
Ben Hutchings8ceee662008-04-27 12:55:59 +01002267
2268 /* Set up basic I/O (BAR mappings etc) */
2269 rc = efx_init_io(efx);
2270 if (rc)
2271 goto fail2;
2272
2273 /* No serialisation is required with the reset path because
2274 * we're in STATE_INIT. */
2275 for (i = 0; i < 5; i++) {
2276 rc = efx_pci_probe_main(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002277
2278 /* Serialise against efx_reset(). No more resets will be
2279 * scheduled since efx_stop_all() has been called, and we
2280 * have not and never have been registered with either
2281 * the rtnetlink or driverlink layers. */
Steve Hodgson1ab00622008-12-12 21:33:02 -08002282 cancel_work_sync(&efx->reset_work);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002283
Steve Hodgsonfa402b22008-12-12 22:08:16 -08002284 if (rc == 0) {
2285 if (efx->reset_pending != RESET_TYPE_NONE) {
2286 /* If there was a scheduled reset during
2287 * probe, the NIC is probably hosed anyway */
2288 efx_pci_remove_main(efx);
2289 rc = -EIO;
2290 } else {
2291 break;
2292 }
2293 }
2294
Ben Hutchings8ceee662008-04-27 12:55:59 +01002295 /* Retry if a recoverably reset event has been scheduled */
2296 if ((efx->reset_pending != RESET_TYPE_INVISIBLE) &&
2297 (efx->reset_pending != RESET_TYPE_ALL))
2298 goto fail3;
2299
2300 efx->reset_pending = RESET_TYPE_NONE;
2301 }
2302
2303 if (rc) {
Ben Hutchings62776d02010-06-23 11:30:07 +00002304 netif_err(efx, probe, efx->net_dev, "Could not reset NIC\n");
Ben Hutchings8ceee662008-04-27 12:55:59 +01002305 goto fail4;
2306 }
2307
Ben Hutchings55edc6e2009-11-25 16:11:35 +00002308 /* Switch to the running state before we expose the device to the OS,
2309 * so that dev_open()|efx_start_all() will actually start the device */
Ben Hutchings8ceee662008-04-27 12:55:59 +01002310 efx->state = STATE_RUNNING;
Ben Hutchings7dde5962008-12-12 22:09:38 -08002311
Ben Hutchings8ceee662008-04-27 12:55:59 +01002312 rc = efx_register_netdev(efx);
2313 if (rc)
2314 goto fail5;
2315
Ben Hutchings62776d02010-06-23 11:30:07 +00002316 netif_dbg(efx, probe, efx->net_dev, "initialisation successful\n");
Ben Hutchingsa5211bb2009-10-23 08:33:09 +00002317
2318 rtnl_lock();
2319 efx_mtd_probe(efx); /* allowed to fail */
2320 rtnl_unlock();
Ben Hutchings8ceee662008-04-27 12:55:59 +01002321 return 0;
2322
2323 fail5:
2324 efx_pci_remove_main(efx);
2325 fail4:
2326 fail3:
2327 efx_fini_io(efx);
2328 fail2:
2329 efx_fini_struct(efx);
2330 fail1:
Steve Hodgson5e2a9112010-02-12 12:32:27 -08002331 WARN_ON(rc > 0);
Ben Hutchings62776d02010-06-23 11:30:07 +00002332 netif_dbg(efx, drv, efx->net_dev, "initialisation failed. rc=%d\n", rc);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002333 free_netdev(net_dev);
2334 return rc;
2335}
2336
Ben Hutchings89c758f2009-11-29 03:43:07 +00002337static int efx_pm_freeze(struct device *dev)
2338{
2339 struct efx_nic *efx = pci_get_drvdata(to_pci_dev(dev));
2340
2341 efx->state = STATE_FINI;
2342
2343 netif_device_detach(efx->net_dev);
2344
2345 efx_stop_all(efx);
2346 efx_fini_channels(efx);
2347
2348 return 0;
2349}
2350
2351static int efx_pm_thaw(struct device *dev)
2352{
2353 struct efx_nic *efx = pci_get_drvdata(to_pci_dev(dev));
2354
2355 efx->state = STATE_INIT;
2356
2357 efx_init_channels(efx);
2358
2359 mutex_lock(&efx->mac_lock);
2360 efx->phy_op->reconfigure(efx);
2361 mutex_unlock(&efx->mac_lock);
2362
2363 efx_start_all(efx);
2364
2365 netif_device_attach(efx->net_dev);
2366
2367 efx->state = STATE_RUNNING;
2368
2369 efx->type->resume_wol(efx);
2370
Steve Hodgson319ba642010-06-01 11:17:24 +00002371 /* Reschedule any quenched resets scheduled during efx_pm_freeze() */
2372 queue_work(reset_workqueue, &efx->reset_work);
2373
Ben Hutchings89c758f2009-11-29 03:43:07 +00002374 return 0;
2375}
2376
2377static int efx_pm_poweroff(struct device *dev)
2378{
2379 struct pci_dev *pci_dev = to_pci_dev(dev);
2380 struct efx_nic *efx = pci_get_drvdata(pci_dev);
2381
2382 efx->type->fini(efx);
2383
2384 efx->reset_pending = RESET_TYPE_NONE;
2385
2386 pci_save_state(pci_dev);
2387 return pci_set_power_state(pci_dev, PCI_D3hot);
2388}
2389
2390/* Used for both resume and restore */
2391static int efx_pm_resume(struct device *dev)
2392{
2393 struct pci_dev *pci_dev = to_pci_dev(dev);
2394 struct efx_nic *efx = pci_get_drvdata(pci_dev);
2395 int rc;
2396
2397 rc = pci_set_power_state(pci_dev, PCI_D0);
2398 if (rc)
2399 return rc;
2400 pci_restore_state(pci_dev);
2401 rc = pci_enable_device(pci_dev);
2402 if (rc)
2403 return rc;
2404 pci_set_master(efx->pci_dev);
2405 rc = efx->type->reset(efx, RESET_TYPE_ALL);
2406 if (rc)
2407 return rc;
2408 rc = efx->type->init(efx);
2409 if (rc)
2410 return rc;
2411 efx_pm_thaw(dev);
2412 return 0;
2413}
2414
2415static int efx_pm_suspend(struct device *dev)
2416{
2417 int rc;
2418
2419 efx_pm_freeze(dev);
2420 rc = efx_pm_poweroff(dev);
2421 if (rc)
2422 efx_pm_resume(dev);
2423 return rc;
2424}
2425
2426static struct dev_pm_ops efx_pm_ops = {
2427 .suspend = efx_pm_suspend,
2428 .resume = efx_pm_resume,
2429 .freeze = efx_pm_freeze,
2430 .thaw = efx_pm_thaw,
2431 .poweroff = efx_pm_poweroff,
2432 .restore = efx_pm_resume,
2433};
2434
Ben Hutchings8ceee662008-04-27 12:55:59 +01002435static struct pci_driver efx_pci_driver = {
Ben Hutchingsc5d5f5f2010-06-23 11:30:26 +00002436 .name = KBUILD_MODNAME,
Ben Hutchings8ceee662008-04-27 12:55:59 +01002437 .id_table = efx_pci_table,
2438 .probe = efx_pci_probe,
2439 .remove = efx_pci_remove,
Ben Hutchings89c758f2009-11-29 03:43:07 +00002440 .driver.pm = &efx_pm_ops,
Ben Hutchings8ceee662008-04-27 12:55:59 +01002441};
2442
2443/**************************************************************************
2444 *
2445 * Kernel module interface
2446 *
2447 *************************************************************************/
2448
2449module_param(interrupt_mode, uint, 0444);
2450MODULE_PARM_DESC(interrupt_mode,
2451 "Interrupt mode (0=>MSIX 1=>MSI 2=>legacy)");
2452
2453static int __init efx_init_module(void)
2454{
2455 int rc;
2456
2457 printk(KERN_INFO "Solarflare NET driver v" EFX_DRIVER_VERSION "\n");
2458
2459 rc = register_netdevice_notifier(&efx_netdev_notifier);
2460 if (rc)
2461 goto err_notifier;
2462
Steve Hodgson1ab00622008-12-12 21:33:02 -08002463 reset_workqueue = create_singlethread_workqueue("sfc_reset");
2464 if (!reset_workqueue) {
2465 rc = -ENOMEM;
2466 goto err_reset;
2467 }
Ben Hutchings8ceee662008-04-27 12:55:59 +01002468
2469 rc = pci_register_driver(&efx_pci_driver);
2470 if (rc < 0)
2471 goto err_pci;
2472
2473 return 0;
2474
2475 err_pci:
Steve Hodgson1ab00622008-12-12 21:33:02 -08002476 destroy_workqueue(reset_workqueue);
2477 err_reset:
Ben Hutchings8ceee662008-04-27 12:55:59 +01002478 unregister_netdevice_notifier(&efx_netdev_notifier);
2479 err_notifier:
2480 return rc;
2481}
2482
2483static void __exit efx_exit_module(void)
2484{
2485 printk(KERN_INFO "Solarflare NET driver unloading\n");
2486
2487 pci_unregister_driver(&efx_pci_driver);
Steve Hodgson1ab00622008-12-12 21:33:02 -08002488 destroy_workqueue(reset_workqueue);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002489 unregister_netdevice_notifier(&efx_netdev_notifier);
2490
2491}
2492
2493module_init(efx_init_module);
2494module_exit(efx_exit_module);
2495
Ben Hutchings906bb262009-11-29 15:16:19 +00002496MODULE_AUTHOR("Solarflare Communications and "
2497 "Michael Brown <mbrown@fensystems.co.uk>");
Ben Hutchings8ceee662008-04-27 12:55:59 +01002498MODULE_DESCRIPTION("Solarflare Communications network driver");
2499MODULE_LICENSE("GPL");
2500MODULE_DEVICE_TABLE(pci, efx_pci_table);