blob: ba674c5ca29e76a87da30259505b5fa7e0e43098 [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{
Ben Hutchings765c9f42010-06-30 05:06:28 +00001124 size_t i;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001125 int rc;
1126
Ben Hutchings62776d02010-06-23 11:30:07 +00001127 netif_dbg(efx, probe, efx->net_dev, "creating NIC\n");
Ben Hutchings8ceee662008-04-27 12:55:59 +01001128
1129 /* Carry out hardware-type specific initialisation */
Ben Hutchingsef2b90e2009-11-29 03:42:31 +00001130 rc = efx->type->probe(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001131 if (rc)
1132 return rc;
1133
Ben Hutchingsa4900ac2010-04-28 09:30:43 +00001134 /* Determine the number of channels and queues by trying to hook
Ben Hutchings8ceee662008-04-27 12:55:59 +01001135 * in MSI-X interrupts. */
1136 efx_probe_interrupts(efx);
1137
Ben Hutchings5d3a6fc2010-06-25 07:05:43 +00001138 if (efx->n_channels > 1)
1139 get_random_bytes(&efx->rx_hash_key, sizeof(efx->rx_hash_key));
Ben Hutchings765c9f42010-06-30 05:06:28 +00001140 for (i = 0; i < ARRAY_SIZE(efx->rx_indir_table); i++)
1141 efx->rx_indir_table[i] = i % efx->n_rx_channels;
Ben Hutchings5d3a6fc2010-06-25 07:05:43 +00001142
Ben Hutchings8831da72008-09-01 12:47:48 +01001143 efx_set_channels(efx);
Ben Hutchingsa4900ac2010-04-28 09:30:43 +00001144 efx->net_dev->real_num_tx_queues = efx->n_tx_channels;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001145
1146 /* Initialise the interrupt moderation settings */
Ben Hutchings6fb70fd2009-03-20 13:30:37 +00001147 efx_init_irq_moderation(efx, tx_irq_mod_usec, rx_irq_mod_usec, true);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001148
1149 return 0;
1150}
1151
1152static void efx_remove_nic(struct efx_nic *efx)
1153{
Ben Hutchings62776d02010-06-23 11:30:07 +00001154 netif_dbg(efx, drv, efx->net_dev, "destroying NIC\n");
Ben Hutchings8ceee662008-04-27 12:55:59 +01001155
1156 efx_remove_interrupts(efx);
Ben Hutchingsef2b90e2009-11-29 03:42:31 +00001157 efx->type->remove(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001158}
1159
1160/**************************************************************************
1161 *
1162 * NIC startup/shutdown
1163 *
1164 *************************************************************************/
1165
1166static int efx_probe_all(struct efx_nic *efx)
1167{
1168 struct efx_channel *channel;
1169 int rc;
1170
1171 /* Create NIC */
1172 rc = efx_probe_nic(efx);
1173 if (rc) {
Ben Hutchings62776d02010-06-23 11:30:07 +00001174 netif_err(efx, probe, efx->net_dev, "failed to create NIC\n");
Ben Hutchings8ceee662008-04-27 12:55:59 +01001175 goto fail1;
1176 }
1177
1178 /* Create port */
1179 rc = efx_probe_port(efx);
1180 if (rc) {
Ben Hutchings62776d02010-06-23 11:30:07 +00001181 netif_err(efx, probe, efx->net_dev, "failed to create port\n");
Ben Hutchings8ceee662008-04-27 12:55:59 +01001182 goto fail2;
1183 }
1184
1185 /* Create channels */
1186 efx_for_each_channel(channel, efx) {
1187 rc = efx_probe_channel(channel);
1188 if (rc) {
Ben Hutchings62776d02010-06-23 11:30:07 +00001189 netif_err(efx, probe, efx->net_dev,
1190 "failed to create channel %d\n",
1191 channel->channel);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001192 goto fail3;
1193 }
1194 }
Ben Hutchings56536e92008-12-12 21:37:02 -08001195 efx_set_channel_names(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001196
1197 return 0;
1198
1199 fail3:
1200 efx_for_each_channel(channel, efx)
1201 efx_remove_channel(channel);
1202 efx_remove_port(efx);
1203 fail2:
1204 efx_remove_nic(efx);
1205 fail1:
1206 return rc;
1207}
1208
1209/* Called after previous invocation(s) of efx_stop_all, restarts the
1210 * port, kernel transmit queue, NAPI processing and hardware interrupts,
1211 * and ensures that the port is scheduled to be reconfigured.
1212 * This function is safe to call multiple times when the NIC is in any
1213 * state. */
1214static void efx_start_all(struct efx_nic *efx)
1215{
1216 struct efx_channel *channel;
1217
1218 EFX_ASSERT_RESET_SERIALISED(efx);
1219
1220 /* Check that it is appropriate to restart the interface. All
1221 * of these flags are safe to read under just the rtnl lock */
1222 if (efx->port_enabled)
1223 return;
1224 if ((efx->state != STATE_RUNNING) && (efx->state != STATE_INIT))
1225 return;
Ben Hutchings55668612008-05-16 21:16:10 +01001226 if (efx_dev_registered(efx) && !netif_running(efx->net_dev))
Ben Hutchings8ceee662008-04-27 12:55:59 +01001227 return;
1228
1229 /* Mark the port as enabled so port reconfigurations can start, then
1230 * restart the transmit interface early so the watchdog timer stops */
1231 efx_start_port(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001232
Ben Hutchingsa4900ac2010-04-28 09:30:43 +00001233 efx_for_each_channel(channel, efx) {
1234 if (efx_dev_registered(efx))
1235 efx_wake_queue(channel);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001236 efx_start_channel(channel);
Ben Hutchingsa4900ac2010-04-28 09:30:43 +00001237 }
Ben Hutchings8ceee662008-04-27 12:55:59 +01001238
Ben Hutchings152b6a62009-11-29 03:43:56 +00001239 efx_nic_enable_interrupts(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001240
Ben Hutchings8880f4e2009-11-29 15:15:41 +00001241 /* Switch to event based MCDI completions after enabling interrupts.
1242 * If a reset has been scheduled, then we need to stay in polled mode.
1243 * Rather than serialising efx_mcdi_mode_event() [which sleeps] and
1244 * reset_pending [modified from an atomic context], we instead guarantee
1245 * that efx_mcdi_mode_poll() isn't reverted erroneously */
1246 efx_mcdi_mode_event(efx);
1247 if (efx->reset_pending != RESET_TYPE_NONE)
1248 efx_mcdi_mode_poll(efx);
1249
Steve Hodgson78c1f0a2009-11-29 03:43:00 +00001250 /* Start the hardware monitor if there is one. Otherwise (we're link
1251 * event driven), we have to poll the PHY because after an event queue
1252 * flush, we could have a missed a link state change */
1253 if (efx->type->monitor != NULL) {
Ben Hutchings8ceee662008-04-27 12:55:59 +01001254 queue_delayed_work(efx->workqueue, &efx->monitor_work,
1255 efx_monitor_interval);
Steve Hodgson78c1f0a2009-11-29 03:43:00 +00001256 } else {
1257 mutex_lock(&efx->mac_lock);
1258 if (efx->phy_op->poll(efx))
1259 efx_link_status_changed(efx);
1260 mutex_unlock(&efx->mac_lock);
1261 }
Ben Hutchings55edc6e2009-11-25 16:11:35 +00001262
Ben Hutchingsef2b90e2009-11-29 03:42:31 +00001263 efx->type->start_stats(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001264}
1265
1266/* Flush all delayed work. Should only be called when no more delayed work
1267 * will be scheduled. This doesn't flush pending online resets (efx_reset),
1268 * since we're holding the rtnl_lock at this point. */
1269static void efx_flush_all(struct efx_nic *efx)
1270{
Ben Hutchings8ceee662008-04-27 12:55:59 +01001271 /* Make sure the hardware monitor is stopped */
1272 cancel_delayed_work_sync(&efx->monitor_work);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001273 /* Stop scheduled port reconfigurations */
Ben Hutchings766ca0f2008-12-12 21:59:24 -08001274 cancel_work_sync(&efx->mac_work);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001275}
1276
1277/* Quiesce hardware and software without bringing the link down.
1278 * Safe to call multiple times, when the nic and interface is in any
1279 * state. The caller is guaranteed to subsequently be in a position
1280 * to modify any hardware and software state they see fit without
1281 * taking locks. */
1282static void efx_stop_all(struct efx_nic *efx)
1283{
1284 struct efx_channel *channel;
1285
1286 EFX_ASSERT_RESET_SERIALISED(efx);
1287
1288 /* port_enabled can be read safely under the rtnl lock */
1289 if (!efx->port_enabled)
1290 return;
1291
Ben Hutchingsef2b90e2009-11-29 03:42:31 +00001292 efx->type->stop_stats(efx);
Ben Hutchings55edc6e2009-11-25 16:11:35 +00001293
Ben Hutchings8880f4e2009-11-29 15:15:41 +00001294 /* Switch to MCDI polling on Siena before disabling interrupts */
1295 efx_mcdi_mode_poll(efx);
1296
Ben Hutchings8ceee662008-04-27 12:55:59 +01001297 /* Disable interrupts and wait for ISR to complete */
Ben Hutchings152b6a62009-11-29 03:43:56 +00001298 efx_nic_disable_interrupts(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001299 if (efx->legacy_irq)
1300 synchronize_irq(efx->legacy_irq);
Ben Hutchings64ee3122008-09-01 12:47:38 +01001301 efx_for_each_channel(channel, efx) {
Ben Hutchings8ceee662008-04-27 12:55:59 +01001302 if (channel->irq)
1303 synchronize_irq(channel->irq);
Ben Hutchingsb3475642008-05-16 21:15:49 +01001304 }
Ben Hutchings8ceee662008-04-27 12:55:59 +01001305
1306 /* Stop all NAPI processing and synchronous rx refills */
1307 efx_for_each_channel(channel, efx)
1308 efx_stop_channel(channel);
1309
1310 /* Stop all asynchronous port reconfigurations. Since all
1311 * event processing has already been stopped, there is no
1312 * window to loose phy events */
1313 efx_stop_port(efx);
1314
Steve Hodgsonfdaa9ae2009-11-28 05:34:05 +00001315 /* Flush efx_mac_work(), refill_workqueue, monitor_work */
Ben Hutchings8ceee662008-04-27 12:55:59 +01001316 efx_flush_all(efx);
1317
Ben Hutchings8ceee662008-04-27 12:55:59 +01001318 /* Stop the kernel transmit interface late, so the watchdog
1319 * timer isn't ticking over the flush */
Ben Hutchings55668612008-05-16 21:16:10 +01001320 if (efx_dev_registered(efx)) {
Ben Hutchingsa4900ac2010-04-28 09:30:43 +00001321 struct efx_channel *channel;
1322 efx_for_each_channel(channel, efx)
1323 efx_stop_queue(channel);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001324 netif_tx_lock_bh(efx->net_dev);
1325 netif_tx_unlock_bh(efx->net_dev);
1326 }
1327}
1328
1329static void efx_remove_all(struct efx_nic *efx)
1330{
1331 struct efx_channel *channel;
1332
1333 efx_for_each_channel(channel, efx)
1334 efx_remove_channel(channel);
1335 efx_remove_port(efx);
1336 efx_remove_nic(efx);
1337}
1338
Ben Hutchings8ceee662008-04-27 12:55:59 +01001339/**************************************************************************
1340 *
1341 * Interrupt moderation
1342 *
1343 **************************************************************************/
1344
Ben Hutchings0d86ebd2009-10-23 08:32:13 +00001345static unsigned irq_mod_ticks(int usecs, int resolution)
1346{
1347 if (usecs <= 0)
1348 return 0; /* cannot receive interrupts ahead of time :-) */
1349 if (usecs < resolution)
1350 return 1; /* never round down to 0 */
1351 return usecs / resolution;
1352}
1353
Ben Hutchings8ceee662008-04-27 12:55:59 +01001354/* Set interrupt moderation parameters */
Ben Hutchings6fb70fd2009-03-20 13:30:37 +00001355void efx_init_irq_moderation(struct efx_nic *efx, int tx_usecs, int rx_usecs,
1356 bool rx_adaptive)
Ben Hutchings8ceee662008-04-27 12:55:59 +01001357{
1358 struct efx_tx_queue *tx_queue;
1359 struct efx_rx_queue *rx_queue;
Ben Hutchings152b6a62009-11-29 03:43:56 +00001360 unsigned tx_ticks = irq_mod_ticks(tx_usecs, EFX_IRQ_MOD_RESOLUTION);
1361 unsigned rx_ticks = irq_mod_ticks(rx_usecs, EFX_IRQ_MOD_RESOLUTION);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001362
1363 EFX_ASSERT_RESET_SERIALISED(efx);
1364
1365 efx_for_each_tx_queue(tx_queue, efx)
Ben Hutchings0d86ebd2009-10-23 08:32:13 +00001366 tx_queue->channel->irq_moderation = tx_ticks;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001367
Ben Hutchings6fb70fd2009-03-20 13:30:37 +00001368 efx->irq_rx_adaptive = rx_adaptive;
Ben Hutchings0d86ebd2009-10-23 08:32:13 +00001369 efx->irq_rx_moderation = rx_ticks;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001370 efx_for_each_rx_queue(rx_queue, efx)
Ben Hutchings0d86ebd2009-10-23 08:32:13 +00001371 rx_queue->channel->irq_moderation = rx_ticks;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001372}
1373
1374/**************************************************************************
1375 *
1376 * Hardware monitor
1377 *
1378 **************************************************************************/
1379
1380/* Run periodically off the general workqueue. Serialised against
1381 * efx_reconfigure_port via the mac_lock */
1382static void efx_monitor(struct work_struct *data)
1383{
1384 struct efx_nic *efx = container_of(data, struct efx_nic,
1385 monitor_work.work);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001386
Ben Hutchings62776d02010-06-23 11:30:07 +00001387 netif_vdbg(efx, timer, efx->net_dev,
1388 "hardware monitor executing on CPU %d\n",
1389 raw_smp_processor_id());
Ben Hutchingsef2b90e2009-11-29 03:42:31 +00001390 BUG_ON(efx->type->monitor == NULL);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001391
Ben Hutchings8ceee662008-04-27 12:55:59 +01001392 /* If the mac_lock is already held then it is likely a port
1393 * reconfiguration is already in place, which will likely do
1394 * most of the work of check_hw() anyway. */
Ben Hutchings766ca0f2008-12-12 21:59:24 -08001395 if (!mutex_trylock(&efx->mac_lock))
1396 goto out_requeue;
1397 if (!efx->port_enabled)
1398 goto out_unlock;
Ben Hutchingsef2b90e2009-11-29 03:42:31 +00001399 efx->type->monitor(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001400
Ben Hutchings766ca0f2008-12-12 21:59:24 -08001401out_unlock:
Ben Hutchings8ceee662008-04-27 12:55:59 +01001402 mutex_unlock(&efx->mac_lock);
Ben Hutchings766ca0f2008-12-12 21:59:24 -08001403out_requeue:
Ben Hutchings8ceee662008-04-27 12:55:59 +01001404 queue_delayed_work(efx->workqueue, &efx->monitor_work,
1405 efx_monitor_interval);
1406}
1407
1408/**************************************************************************
1409 *
1410 * ioctls
1411 *
1412 *************************************************************************/
1413
1414/* Net device ioctl
1415 * Context: process, rtnl_lock() held.
1416 */
1417static int efx_ioctl(struct net_device *net_dev, struct ifreq *ifr, int cmd)
1418{
Ben Hutchings767e4682008-09-01 12:43:14 +01001419 struct efx_nic *efx = netdev_priv(net_dev);
Ben Hutchings68e7f452009-04-29 08:05:08 +00001420 struct mii_ioctl_data *data = if_mii(ifr);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001421
1422 EFX_ASSERT_RESET_SERIALISED(efx);
1423
Ben Hutchings68e7f452009-04-29 08:05:08 +00001424 /* Convert phy_id from older PRTAD/DEVAD format */
1425 if ((cmd == SIOCGMIIREG || cmd == SIOCSMIIREG) &&
1426 (data->phy_id & 0xfc00) == 0x0400)
1427 data->phy_id ^= MDIO_PHY_ID_C45 | 0x0400;
1428
1429 return mdio_mii_ioctl(&efx->mdio, data, cmd);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001430}
1431
1432/**************************************************************************
1433 *
1434 * NAPI interface
1435 *
1436 **************************************************************************/
1437
1438static int efx_init_napi(struct efx_nic *efx)
1439{
1440 struct efx_channel *channel;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001441
1442 efx_for_each_channel(channel, efx) {
1443 channel->napi_dev = efx->net_dev;
Ben Hutchings718cff12009-04-14 19:47:46 -07001444 netif_napi_add(channel->napi_dev, &channel->napi_str,
1445 efx_poll, napi_weight);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001446 }
1447 return 0;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001448}
1449
1450static void efx_fini_napi(struct efx_nic *efx)
1451{
1452 struct efx_channel *channel;
1453
1454 efx_for_each_channel(channel, efx) {
Ben Hutchings718cff12009-04-14 19:47:46 -07001455 if (channel->napi_dev)
1456 netif_napi_del(&channel->napi_str);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001457 channel->napi_dev = NULL;
1458 }
1459}
1460
1461/**************************************************************************
1462 *
1463 * Kernel netpoll interface
1464 *
1465 *************************************************************************/
1466
1467#ifdef CONFIG_NET_POLL_CONTROLLER
1468
1469/* Although in the common case interrupts will be disabled, this is not
1470 * guaranteed. However, all our work happens inside the NAPI callback,
1471 * so no locking is required.
1472 */
1473static void efx_netpoll(struct net_device *net_dev)
1474{
Ben Hutchings767e4682008-09-01 12:43:14 +01001475 struct efx_nic *efx = netdev_priv(net_dev);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001476 struct efx_channel *channel;
1477
Ben Hutchings64ee3122008-09-01 12:47:38 +01001478 efx_for_each_channel(channel, efx)
Ben Hutchings8ceee662008-04-27 12:55:59 +01001479 efx_schedule_channel(channel);
1480}
1481
1482#endif
1483
1484/**************************************************************************
1485 *
1486 * Kernel net device interface
1487 *
1488 *************************************************************************/
1489
1490/* Context: process, rtnl_lock() held. */
1491static int efx_net_open(struct net_device *net_dev)
1492{
Ben Hutchings767e4682008-09-01 12:43:14 +01001493 struct efx_nic *efx = netdev_priv(net_dev);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001494 EFX_ASSERT_RESET_SERIALISED(efx);
1495
Ben Hutchings62776d02010-06-23 11:30:07 +00001496 netif_dbg(efx, ifup, efx->net_dev, "opening device on CPU %d\n",
1497 raw_smp_processor_id());
Ben Hutchings8ceee662008-04-27 12:55:59 +01001498
Ben Hutchingsf4bd9542008-12-26 13:48:51 -08001499 if (efx->state == STATE_DISABLED)
1500 return -EIO;
Ben Hutchingsf8b87c12008-09-01 12:48:17 +01001501 if (efx->phy_mode & PHY_MODE_SPECIAL)
1502 return -EBUSY;
Ben Hutchings8880f4e2009-11-29 15:15:41 +00001503 if (efx_mcdi_poll_reboot(efx) && efx_reset(efx, RESET_TYPE_ALL))
1504 return -EIO;
Ben Hutchingsf8b87c12008-09-01 12:48:17 +01001505
Steve Hodgson78c1f0a2009-11-29 03:43:00 +00001506 /* Notify the kernel of the link state polled during driver load,
1507 * before the monitor starts running */
1508 efx_link_status_changed(efx);
1509
Ben Hutchings8ceee662008-04-27 12:55:59 +01001510 efx_start_all(efx);
1511 return 0;
1512}
1513
1514/* Context: process, rtnl_lock() held.
1515 * Note that the kernel will ignore our return code; this method
1516 * should really be a void.
1517 */
1518static int efx_net_stop(struct net_device *net_dev)
1519{
Ben Hutchings767e4682008-09-01 12:43:14 +01001520 struct efx_nic *efx = netdev_priv(net_dev);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001521
Ben Hutchings62776d02010-06-23 11:30:07 +00001522 netif_dbg(efx, ifdown, efx->net_dev, "closing on CPU %d\n",
1523 raw_smp_processor_id());
Ben Hutchings8ceee662008-04-27 12:55:59 +01001524
Ben Hutchingsf4bd9542008-12-26 13:48:51 -08001525 if (efx->state != STATE_DISABLED) {
1526 /* Stop the device and flush all the channels */
1527 efx_stop_all(efx);
1528 efx_fini_channels(efx);
1529 efx_init_channels(efx);
1530 }
Ben Hutchings8ceee662008-04-27 12:55:59 +01001531
1532 return 0;
1533}
1534
Ben Hutchings5b9e2072008-05-16 21:18:14 +01001535/* Context: process, dev_base_lock or RTNL held, non-blocking. */
Eric Dumazet28172732010-07-07 14:58:56 -07001536static struct rtnl_link_stats64 *efx_net_stats(struct net_device *net_dev, struct rtnl_link_stats64 *stats)
Ben Hutchings8ceee662008-04-27 12:55:59 +01001537{
Ben Hutchings767e4682008-09-01 12:43:14 +01001538 struct efx_nic *efx = netdev_priv(net_dev);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001539 struct efx_mac_stats *mac_stats = &efx->mac_stats;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001540
Ben Hutchings55edc6e2009-11-25 16:11:35 +00001541 spin_lock_bh(&efx->stats_lock);
Ben Hutchingsef2b90e2009-11-29 03:42:31 +00001542 efx->type->update_stats(efx);
Ben Hutchings55edc6e2009-11-25 16:11:35 +00001543 spin_unlock_bh(&efx->stats_lock);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001544
1545 stats->rx_packets = mac_stats->rx_packets;
1546 stats->tx_packets = mac_stats->tx_packets;
1547 stats->rx_bytes = mac_stats->rx_bytes;
1548 stats->tx_bytes = mac_stats->tx_bytes;
1549 stats->multicast = mac_stats->rx_multicast;
1550 stats->collisions = mac_stats->tx_collision;
1551 stats->rx_length_errors = (mac_stats->rx_gtjumbo +
1552 mac_stats->rx_length_error);
1553 stats->rx_over_errors = efx->n_rx_nodesc_drop_cnt;
1554 stats->rx_crc_errors = mac_stats->rx_bad;
1555 stats->rx_frame_errors = mac_stats->rx_align_error;
1556 stats->rx_fifo_errors = mac_stats->rx_overflow;
1557 stats->rx_missed_errors = mac_stats->rx_missed;
1558 stats->tx_window_errors = mac_stats->tx_late_collision;
1559
1560 stats->rx_errors = (stats->rx_length_errors +
Ben Hutchings8ceee662008-04-27 12:55:59 +01001561 stats->rx_crc_errors +
1562 stats->rx_frame_errors +
Ben Hutchings8ceee662008-04-27 12:55:59 +01001563 mac_stats->rx_symbol_error);
1564 stats->tx_errors = (stats->tx_window_errors +
1565 mac_stats->tx_bad);
1566
1567 return stats;
1568}
1569
1570/* Context: netif_tx_lock held, BHs disabled. */
1571static void efx_watchdog(struct net_device *net_dev)
1572{
Ben Hutchings767e4682008-09-01 12:43:14 +01001573 struct efx_nic *efx = netdev_priv(net_dev);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001574
Ben Hutchings62776d02010-06-23 11:30:07 +00001575 netif_err(efx, tx_err, efx->net_dev,
1576 "TX stuck with port_enabled=%d: resetting channels\n",
1577 efx->port_enabled);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001578
Ben Hutchings739bb23d2008-11-04 20:35:36 +00001579 efx_schedule_reset(efx, RESET_TYPE_TX_WATCHDOG);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001580}
1581
1582
1583/* Context: process, rtnl_lock() held. */
1584static int efx_change_mtu(struct net_device *net_dev, int new_mtu)
1585{
Ben Hutchings767e4682008-09-01 12:43:14 +01001586 struct efx_nic *efx = netdev_priv(net_dev);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001587 int rc = 0;
1588
1589 EFX_ASSERT_RESET_SERIALISED(efx);
1590
1591 if (new_mtu > EFX_MAX_MTU)
1592 return -EINVAL;
1593
1594 efx_stop_all(efx);
1595
Ben Hutchings62776d02010-06-23 11:30:07 +00001596 netif_dbg(efx, drv, efx->net_dev, "changing MTU to %d\n", new_mtu);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001597
1598 efx_fini_channels(efx);
Ben Hutchingsd3245b22009-11-29 03:42:41 +00001599
1600 mutex_lock(&efx->mac_lock);
1601 /* Reconfigure the MAC before enabling the dma queues so that
1602 * the RX buffers don't overflow */
Ben Hutchings8ceee662008-04-27 12:55:59 +01001603 net_dev->mtu = new_mtu;
Ben Hutchingsd3245b22009-11-29 03:42:41 +00001604 efx->mac_op->reconfigure(efx);
1605 mutex_unlock(&efx->mac_lock);
1606
Ben Hutchingsbc3c90a2008-09-01 12:48:46 +01001607 efx_init_channels(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001608
1609 efx_start_all(efx);
1610 return rc;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001611}
1612
1613static int efx_set_mac_address(struct net_device *net_dev, void *data)
1614{
Ben Hutchings767e4682008-09-01 12:43:14 +01001615 struct efx_nic *efx = netdev_priv(net_dev);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001616 struct sockaddr *addr = data;
1617 char *new_addr = addr->sa_data;
1618
1619 EFX_ASSERT_RESET_SERIALISED(efx);
1620
1621 if (!is_valid_ether_addr(new_addr)) {
Ben Hutchings62776d02010-06-23 11:30:07 +00001622 netif_err(efx, drv, efx->net_dev,
1623 "invalid ethernet MAC address requested: %pM\n",
1624 new_addr);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001625 return -EINVAL;
1626 }
1627
1628 memcpy(net_dev->dev_addr, new_addr, net_dev->addr_len);
1629
1630 /* Reconfigure the MAC */
Ben Hutchingsd3245b22009-11-29 03:42:41 +00001631 mutex_lock(&efx->mac_lock);
1632 efx->mac_op->reconfigure(efx);
1633 mutex_unlock(&efx->mac_lock);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001634
1635 return 0;
1636}
1637
Ben Hutchingsa816f752008-09-01 12:49:12 +01001638/* Context: netif_addr_lock held, BHs disabled. */
Ben Hutchings8ceee662008-04-27 12:55:59 +01001639static void efx_set_multicast_list(struct net_device *net_dev)
1640{
Ben Hutchings767e4682008-09-01 12:43:14 +01001641 struct efx_nic *efx = netdev_priv(net_dev);
Jiri Pirko22bedad32010-04-01 21:22:57 +00001642 struct netdev_hw_addr *ha;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001643 union efx_multicast_hash *mc_hash = &efx->multicast_hash;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001644 u32 crc;
1645 int bit;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001646
Ben Hutchings8be4f3e2009-11-25 16:12:16 +00001647 efx->promiscuous = !!(net_dev->flags & IFF_PROMISC);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001648
1649 /* Build multicast hash table */
Ben Hutchings8be4f3e2009-11-25 16:12:16 +00001650 if (efx->promiscuous || (net_dev->flags & IFF_ALLMULTI)) {
Ben Hutchings8ceee662008-04-27 12:55:59 +01001651 memset(mc_hash, 0xff, sizeof(*mc_hash));
1652 } else {
1653 memset(mc_hash, 0x00, sizeof(*mc_hash));
Jiri Pirko22bedad32010-04-01 21:22:57 +00001654 netdev_for_each_mc_addr(ha, net_dev) {
1655 crc = ether_crc_le(ETH_ALEN, ha->addr);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001656 bit = crc & (EFX_MCAST_HASH_ENTRIES - 1);
1657 set_bit_le(bit, mc_hash->byte);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001658 }
Ben Hutchings8be4f3e2009-11-25 16:12:16 +00001659
1660 /* Broadcast packets go through the multicast hash filter.
1661 * ether_crc_le() of the broadcast address is 0xbe2612ff
1662 * so we always add bit 0xff to the mask.
1663 */
1664 set_bit_le(0xff, mc_hash->byte);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001665 }
1666
Ben Hutchings8be4f3e2009-11-25 16:12:16 +00001667 if (efx->port_enabled)
1668 queue_work(efx->workqueue, &efx->mac_work);
1669 /* Otherwise efx_start_port() will do this */
Ben Hutchings8ceee662008-04-27 12:55:59 +01001670}
1671
Stephen Hemmingerc3ecb9f2008-11-21 17:32:54 -08001672static const struct net_device_ops efx_netdev_ops = {
1673 .ndo_open = efx_net_open,
1674 .ndo_stop = efx_net_stop,
Ben Hutchings44727022010-06-08 07:21:12 +00001675 .ndo_get_stats64 = efx_net_stats,
Stephen Hemmingerc3ecb9f2008-11-21 17:32:54 -08001676 .ndo_tx_timeout = efx_watchdog,
1677 .ndo_start_xmit = efx_hard_start_xmit,
1678 .ndo_validate_addr = eth_validate_addr,
1679 .ndo_do_ioctl = efx_ioctl,
1680 .ndo_change_mtu = efx_change_mtu,
1681 .ndo_set_mac_address = efx_set_mac_address,
1682 .ndo_set_multicast_list = efx_set_multicast_list,
1683#ifdef CONFIG_NET_POLL_CONTROLLER
1684 .ndo_poll_controller = efx_netpoll,
1685#endif
1686};
1687
Ben Hutchings7dde5962008-12-12 22:09:38 -08001688static void efx_update_name(struct efx_nic *efx)
1689{
1690 strcpy(efx->name, efx->net_dev->name);
1691 efx_mtd_rename(efx);
1692 efx_set_channel_names(efx);
1693}
1694
Ben Hutchings8ceee662008-04-27 12:55:59 +01001695static int efx_netdev_event(struct notifier_block *this,
1696 unsigned long event, void *ptr)
1697{
Ben Hutchingsd3208b52008-05-16 21:20:00 +01001698 struct net_device *net_dev = ptr;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001699
Ben Hutchings7dde5962008-12-12 22:09:38 -08001700 if (net_dev->netdev_ops == &efx_netdev_ops &&
1701 event == NETDEV_CHANGENAME)
1702 efx_update_name(netdev_priv(net_dev));
Ben Hutchings8ceee662008-04-27 12:55:59 +01001703
1704 return NOTIFY_DONE;
1705}
1706
1707static struct notifier_block efx_netdev_notifier = {
1708 .notifier_call = efx_netdev_event,
1709};
1710
Ben Hutchings06d5e192008-12-12 21:47:23 -08001711static ssize_t
1712show_phy_type(struct device *dev, struct device_attribute *attr, char *buf)
1713{
1714 struct efx_nic *efx = pci_get_drvdata(to_pci_dev(dev));
1715 return sprintf(buf, "%d\n", efx->phy_type);
1716}
1717static DEVICE_ATTR(phy_type, 0644, show_phy_type, NULL);
1718
Ben Hutchings8ceee662008-04-27 12:55:59 +01001719static int efx_register_netdev(struct efx_nic *efx)
1720{
1721 struct net_device *net_dev = efx->net_dev;
1722 int rc;
1723
1724 net_dev->watchdog_timeo = 5 * HZ;
1725 net_dev->irq = efx->pci_dev->irq;
Stephen Hemmingerc3ecb9f2008-11-21 17:32:54 -08001726 net_dev->netdev_ops = &efx_netdev_ops;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001727 SET_ETHTOOL_OPS(net_dev, &efx_ethtool_ops);
1728
Ben Hutchings8ceee662008-04-27 12:55:59 +01001729 /* Clear MAC statistics */
Ben Hutchings177dfcd2008-12-12 21:50:08 -08001730 efx->mac_op->update_stats(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001731 memset(&efx->mac_stats, 0, sizeof(efx->mac_stats));
1732
Ben Hutchings7dde5962008-12-12 22:09:38 -08001733 rtnl_lock();
Ben Hutchingsaed06282009-08-26 08:16:27 +00001734
1735 rc = dev_alloc_name(net_dev, net_dev->name);
1736 if (rc < 0)
1737 goto fail_locked;
Ben Hutchings7dde5962008-12-12 22:09:38 -08001738 efx_update_name(efx);
Ben Hutchingsaed06282009-08-26 08:16:27 +00001739
1740 rc = register_netdevice(net_dev);
1741 if (rc)
1742 goto fail_locked;
1743
1744 /* Always start with carrier off; PHY events will detect the link */
1745 netif_carrier_off(efx->net_dev);
1746
Ben Hutchings7dde5962008-12-12 22:09:38 -08001747 rtnl_unlock();
Ben Hutchings8ceee662008-04-27 12:55:59 +01001748
Ben Hutchings06d5e192008-12-12 21:47:23 -08001749 rc = device_create_file(&efx->pci_dev->dev, &dev_attr_phy_type);
1750 if (rc) {
Ben Hutchings62776d02010-06-23 11:30:07 +00001751 netif_err(efx, drv, efx->net_dev,
1752 "failed to init net dev attributes\n");
Ben Hutchings06d5e192008-12-12 21:47:23 -08001753 goto fail_registered;
1754 }
1755
Ben Hutchings8ceee662008-04-27 12:55:59 +01001756 return 0;
Ben Hutchings06d5e192008-12-12 21:47:23 -08001757
Ben Hutchingsaed06282009-08-26 08:16:27 +00001758fail_locked:
1759 rtnl_unlock();
Ben Hutchings62776d02010-06-23 11:30:07 +00001760 netif_err(efx, drv, efx->net_dev, "could not register net dev\n");
Ben Hutchingsaed06282009-08-26 08:16:27 +00001761 return rc;
1762
Ben Hutchings06d5e192008-12-12 21:47:23 -08001763fail_registered:
1764 unregister_netdev(net_dev);
1765 return rc;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001766}
1767
1768static void efx_unregister_netdev(struct efx_nic *efx)
1769{
1770 struct efx_tx_queue *tx_queue;
1771
1772 if (!efx->net_dev)
1773 return;
1774
Ben Hutchings767e4682008-09-01 12:43:14 +01001775 BUG_ON(netdev_priv(efx->net_dev) != efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001776
1777 /* Free up any skbs still remaining. This has to happen before
1778 * we try to unregister the netdev as running their destructors
1779 * may be needed to get the device ref. count to 0. */
1780 efx_for_each_tx_queue(tx_queue, efx)
1781 efx_release_tx_buffers(tx_queue);
1782
Ben Hutchings55668612008-05-16 21:16:10 +01001783 if (efx_dev_registered(efx)) {
Ben Hutchings8ceee662008-04-27 12:55:59 +01001784 strlcpy(efx->name, pci_name(efx->pci_dev), sizeof(efx->name));
Ben Hutchings06d5e192008-12-12 21:47:23 -08001785 device_remove_file(&efx->pci_dev->dev, &dev_attr_phy_type);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001786 unregister_netdev(efx->net_dev);
1787 }
1788}
1789
1790/**************************************************************************
1791 *
1792 * Device reset and suspend
1793 *
1794 **************************************************************************/
1795
Ben Hutchings2467ca42008-09-01 12:48:50 +01001796/* Tears down the entire software state and most of the hardware state
1797 * before reset. */
Ben Hutchingsd3245b22009-11-29 03:42:41 +00001798void efx_reset_down(struct efx_nic *efx, enum reset_type method)
Ben Hutchings8ceee662008-04-27 12:55:59 +01001799{
Ben Hutchings8ceee662008-04-27 12:55:59 +01001800 EFX_ASSERT_RESET_SERIALISED(efx);
1801
Ben Hutchings2467ca42008-09-01 12:48:50 +01001802 efx_stop_all(efx);
1803 mutex_lock(&efx->mac_lock);
Ben Hutchingsf4150722008-11-04 20:34:28 +00001804 mutex_lock(&efx->spi_lock);
Ben Hutchings2467ca42008-09-01 12:48:50 +01001805
Ben Hutchings8ceee662008-04-27 12:55:59 +01001806 efx_fini_channels(efx);
Steve Hodgson4b988282009-01-29 17:50:51 +00001807 if (efx->port_initialized && method != RESET_TYPE_INVISIBLE)
1808 efx->phy_op->fini(efx);
Ben Hutchingsef2b90e2009-11-29 03:42:31 +00001809 efx->type->fini(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001810}
1811
Ben Hutchings2467ca42008-09-01 12:48:50 +01001812/* This function will always ensure that the locks acquired in
1813 * efx_reset_down() are released. A failure return code indicates
1814 * that we were unable to reinitialise the hardware, and the
1815 * driver should be disabled. If ok is false, then the rx and tx
1816 * engines are not restarted, pending a RESET_DISABLE. */
Ben Hutchingsd3245b22009-11-29 03:42:41 +00001817int efx_reset_up(struct efx_nic *efx, enum reset_type method, bool ok)
Ben Hutchings8ceee662008-04-27 12:55:59 +01001818{
1819 int rc;
1820
Ben Hutchings2467ca42008-09-01 12:48:50 +01001821 EFX_ASSERT_RESET_SERIALISED(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001822
Ben Hutchingsef2b90e2009-11-29 03:42:31 +00001823 rc = efx->type->init(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001824 if (rc) {
Ben Hutchings62776d02010-06-23 11:30:07 +00001825 netif_err(efx, drv, efx->net_dev, "failed to initialise NIC\n");
Ben Hutchingseb9f6742009-11-29 03:43:15 +00001826 goto fail;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001827 }
1828
Ben Hutchingseb9f6742009-11-29 03:43:15 +00001829 if (!ok)
1830 goto fail;
1831
Steve Hodgson4b988282009-01-29 17:50:51 +00001832 if (efx->port_initialized && method != RESET_TYPE_INVISIBLE) {
Ben Hutchingseb9f6742009-11-29 03:43:15 +00001833 rc = efx->phy_op->init(efx);
1834 if (rc)
1835 goto fail;
1836 if (efx->phy_op->reconfigure(efx))
Ben Hutchings62776d02010-06-23 11:30:07 +00001837 netif_err(efx, drv, efx->net_dev,
1838 "could not restore PHY settings\n");
Steve Hodgson4b988282009-01-29 17:50:51 +00001839 }
1840
Ben Hutchingseb9f6742009-11-29 03:43:15 +00001841 efx->mac_op->reconfigure(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001842
Ben Hutchingseb9f6742009-11-29 03:43:15 +00001843 efx_init_channels(efx);
Ben Hutchings2467ca42008-09-01 12:48:50 +01001844
Ben Hutchingsf4150722008-11-04 20:34:28 +00001845 mutex_unlock(&efx->spi_lock);
Ben Hutchings2467ca42008-09-01 12:48:50 +01001846 mutex_unlock(&efx->mac_lock);
1847
Ben Hutchingseb9f6742009-11-29 03:43:15 +00001848 efx_start_all(efx);
1849
1850 return 0;
1851
1852fail:
1853 efx->port_initialized = false;
1854
1855 mutex_unlock(&efx->spi_lock);
1856 mutex_unlock(&efx->mac_lock);
1857
Ben Hutchings8ceee662008-04-27 12:55:59 +01001858 return rc;
1859}
1860
Ben Hutchingseb9f6742009-11-29 03:43:15 +00001861/* Reset the NIC using the specified method. Note that the reset may
1862 * fail, in which case the card will be left in an unusable state.
Ben Hutchings8ceee662008-04-27 12:55:59 +01001863 *
Ben Hutchingseb9f6742009-11-29 03:43:15 +00001864 * Caller must hold the rtnl_lock.
Ben Hutchings8ceee662008-04-27 12:55:59 +01001865 */
Ben Hutchingseb9f6742009-11-29 03:43:15 +00001866int efx_reset(struct efx_nic *efx, enum reset_type method)
Ben Hutchings8ceee662008-04-27 12:55:59 +01001867{
Ben Hutchingseb9f6742009-11-29 03:43:15 +00001868 int rc, rc2;
1869 bool disabled;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001870
Ben Hutchings62776d02010-06-23 11:30:07 +00001871 netif_info(efx, drv, efx->net_dev, "resetting (%s)\n",
1872 RESET_TYPE(method));
Ben Hutchings8ceee662008-04-27 12:55:59 +01001873
Ben Hutchingsd3245b22009-11-29 03:42:41 +00001874 efx_reset_down(efx, method);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001875
Ben Hutchingsef2b90e2009-11-29 03:42:31 +00001876 rc = efx->type->reset(efx, method);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001877 if (rc) {
Ben Hutchings62776d02010-06-23 11:30:07 +00001878 netif_err(efx, drv, efx->net_dev, "failed to reset hardware\n");
Ben Hutchingseb9f6742009-11-29 03:43:15 +00001879 goto out;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001880 }
1881
1882 /* Allow resets to be rescheduled. */
1883 efx->reset_pending = RESET_TYPE_NONE;
1884
1885 /* Reinitialise bus-mastering, which may have been turned off before
1886 * the reset was scheduled. This is still appropriate, even in the
1887 * RESET_TYPE_DISABLE since this driver generally assumes the hardware
1888 * can respond to requests. */
1889 pci_set_master(efx->pci_dev);
1890
Ben Hutchingseb9f6742009-11-29 03:43:15 +00001891out:
Ben Hutchings8ceee662008-04-27 12:55:59 +01001892 /* Leave device stopped if necessary */
Ben Hutchingseb9f6742009-11-29 03:43:15 +00001893 disabled = rc || method == RESET_TYPE_DISABLE;
1894 rc2 = efx_reset_up(efx, method, !disabled);
1895 if (rc2) {
1896 disabled = true;
1897 if (!rc)
1898 rc = rc2;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001899 }
1900
Ben Hutchingseb9f6742009-11-29 03:43:15 +00001901 if (disabled) {
Ben Hutchingsf49a4582010-04-28 09:01:33 +00001902 dev_close(efx->net_dev);
Ben Hutchings62776d02010-06-23 11:30:07 +00001903 netif_err(efx, drv, efx->net_dev, "has been disabled\n");
Ben Hutchingsf4bd9542008-12-26 13:48:51 -08001904 efx->state = STATE_DISABLED;
Ben Hutchingsf4bd9542008-12-26 13:48:51 -08001905 } else {
Ben Hutchings62776d02010-06-23 11:30:07 +00001906 netif_dbg(efx, drv, efx->net_dev, "reset complete\n");
Ben Hutchingsf4bd9542008-12-26 13:48:51 -08001907 }
Ben Hutchings8ceee662008-04-27 12:55:59 +01001908 return rc;
1909}
1910
1911/* The worker thread exists so that code that cannot sleep can
1912 * schedule a reset for later.
1913 */
1914static void efx_reset_work(struct work_struct *data)
1915{
Ben Hutchingseb9f6742009-11-29 03:43:15 +00001916 struct efx_nic *efx = container_of(data, struct efx_nic, reset_work);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001917
Steve Hodgson319ba642010-06-01 11:17:24 +00001918 if (efx->reset_pending == RESET_TYPE_NONE)
1919 return;
1920
Ben Hutchingseb9f6742009-11-29 03:43:15 +00001921 /* If we're not RUNNING then don't reset. Leave the reset_pending
1922 * flag set so that efx_pci_probe_main will be retried */
1923 if (efx->state != STATE_RUNNING) {
Ben Hutchings62776d02010-06-23 11:30:07 +00001924 netif_info(efx, drv, efx->net_dev,
1925 "scheduled reset quenched. NIC not RUNNING\n");
Ben Hutchingseb9f6742009-11-29 03:43:15 +00001926 return;
1927 }
1928
1929 rtnl_lock();
Ben Hutchingsf49a4582010-04-28 09:01:33 +00001930 (void)efx_reset(efx, efx->reset_pending);
Ben Hutchingseb9f6742009-11-29 03:43:15 +00001931 rtnl_unlock();
Ben Hutchings8ceee662008-04-27 12:55:59 +01001932}
1933
1934void efx_schedule_reset(struct efx_nic *efx, enum reset_type type)
1935{
1936 enum reset_type method;
1937
1938 if (efx->reset_pending != RESET_TYPE_NONE) {
Ben Hutchings62776d02010-06-23 11:30:07 +00001939 netif_info(efx, drv, efx->net_dev,
1940 "quenching already scheduled reset\n");
Ben Hutchings8ceee662008-04-27 12:55:59 +01001941 return;
1942 }
1943
1944 switch (type) {
1945 case RESET_TYPE_INVISIBLE:
1946 case RESET_TYPE_ALL:
1947 case RESET_TYPE_WORLD:
1948 case RESET_TYPE_DISABLE:
1949 method = type;
1950 break;
1951 case RESET_TYPE_RX_RECOVERY:
1952 case RESET_TYPE_RX_DESC_FETCH:
1953 case RESET_TYPE_TX_DESC_FETCH:
1954 case RESET_TYPE_TX_SKIP:
1955 method = RESET_TYPE_INVISIBLE;
1956 break;
Ben Hutchings8880f4e2009-11-29 15:15:41 +00001957 case RESET_TYPE_MC_FAILURE:
Ben Hutchings8ceee662008-04-27 12:55:59 +01001958 default:
1959 method = RESET_TYPE_ALL;
1960 break;
1961 }
1962
1963 if (method != type)
Ben Hutchings62776d02010-06-23 11:30:07 +00001964 netif_dbg(efx, drv, efx->net_dev,
1965 "scheduling %s reset for %s\n",
1966 RESET_TYPE(method), RESET_TYPE(type));
Ben Hutchings8ceee662008-04-27 12:55:59 +01001967 else
Ben Hutchings62776d02010-06-23 11:30:07 +00001968 netif_dbg(efx, drv, efx->net_dev, "scheduling %s reset\n",
1969 RESET_TYPE(method));
Ben Hutchings8ceee662008-04-27 12:55:59 +01001970
1971 efx->reset_pending = method;
1972
Ben Hutchings8880f4e2009-11-29 15:15:41 +00001973 /* efx_process_channel() will no longer read events once a
1974 * reset is scheduled. So switch back to poll'd MCDI completions. */
1975 efx_mcdi_mode_poll(efx);
1976
Steve Hodgson1ab00622008-12-12 21:33:02 -08001977 queue_work(reset_workqueue, &efx->reset_work);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001978}
1979
1980/**************************************************************************
1981 *
1982 * List of NICs we support
1983 *
1984 **************************************************************************/
1985
1986/* PCI device ID table */
Alexey Dobriyana3aa1882010-01-07 11:58:11 +00001987static DEFINE_PCI_DEVICE_TABLE(efx_pci_table) = {
Ben Hutchings8ceee662008-04-27 12:55:59 +01001988 {PCI_DEVICE(EFX_VENDID_SFC, FALCON_A_P_DEVID),
Ben Hutchingsdaeda632009-11-28 05:36:04 +00001989 .driver_data = (unsigned long) &falcon_a1_nic_type},
Ben Hutchings8ceee662008-04-27 12:55:59 +01001990 {PCI_DEVICE(EFX_VENDID_SFC, FALCON_B_P_DEVID),
Ben Hutchingsdaeda632009-11-28 05:36:04 +00001991 .driver_data = (unsigned long) &falcon_b0_nic_type},
Ben Hutchings8880f4e2009-11-29 15:15:41 +00001992 {PCI_DEVICE(EFX_VENDID_SFC, BETHPAGE_A_P_DEVID),
1993 .driver_data = (unsigned long) &siena_a0_nic_type},
1994 {PCI_DEVICE(EFX_VENDID_SFC, SIENA_A_P_DEVID),
1995 .driver_data = (unsigned long) &siena_a0_nic_type},
Ben Hutchings8ceee662008-04-27 12:55:59 +01001996 {0} /* end of list */
1997};
1998
1999/**************************************************************************
2000 *
Ben Hutchings37594332009-11-23 16:05:45 +00002001 * Dummy PHY/MAC operations
Ben Hutchings8ceee662008-04-27 12:55:59 +01002002 *
Ben Hutchings01aad7b2008-09-01 12:48:36 +01002003 * Can be used for some unimplemented operations
Ben Hutchings8ceee662008-04-27 12:55:59 +01002004 * Needed so all function pointers are valid and do not have to be tested
2005 * before use
2006 *
2007 **************************************************************************/
2008int efx_port_dummy_op_int(struct efx_nic *efx)
2009{
2010 return 0;
2011}
2012void efx_port_dummy_op_void(struct efx_nic *efx) {}
Ben Hutchings398468e2009-11-23 16:03:45 +00002013void efx_port_dummy_op_set_id_led(struct efx_nic *efx, enum efx_led_mode mode)
2014{
2015}
Steve Hodgsonfdaa9ae2009-11-28 05:34:05 +00002016bool efx_port_dummy_op_poll(struct efx_nic *efx)
2017{
2018 return false;
2019}
Ben Hutchings8ceee662008-04-27 12:55:59 +01002020
2021static struct efx_phy_operations efx_dummy_phy_operations = {
2022 .init = efx_port_dummy_op_int,
Ben Hutchingsd3245b22009-11-29 03:42:41 +00002023 .reconfigure = efx_port_dummy_op_int,
Steve Hodgsonfdaa9ae2009-11-28 05:34:05 +00002024 .poll = efx_port_dummy_op_poll,
Ben Hutchings8ceee662008-04-27 12:55:59 +01002025 .fini = efx_port_dummy_op_void,
Ben Hutchings8ceee662008-04-27 12:55:59 +01002026};
2027
Ben Hutchings8ceee662008-04-27 12:55:59 +01002028/**************************************************************************
2029 *
2030 * Data housekeeping
2031 *
2032 **************************************************************************/
2033
2034/* This zeroes out and then fills in the invariants in a struct
2035 * efx_nic (including all sub-structures).
2036 */
2037static int efx_init_struct(struct efx_nic *efx, struct efx_nic_type *type,
2038 struct pci_dev *pci_dev, struct net_device *net_dev)
2039{
2040 struct efx_channel *channel;
2041 struct efx_tx_queue *tx_queue;
2042 struct efx_rx_queue *rx_queue;
Steve Hodgson1ab00622008-12-12 21:33:02 -08002043 int i;
Ben Hutchings8ceee662008-04-27 12:55:59 +01002044
2045 /* Initialise common structures */
2046 memset(efx, 0, sizeof(*efx));
2047 spin_lock_init(&efx->biu_lock);
Steve Hodgsonab867462009-11-28 05:34:44 +00002048 mutex_init(&efx->mdio_lock);
Ben Hutchingsf4150722008-11-04 20:34:28 +00002049 mutex_init(&efx->spi_lock);
Ben Hutchings76884832009-11-29 15:10:44 +00002050#ifdef CONFIG_SFC_MTD
2051 INIT_LIST_HEAD(&efx->mtd_list);
2052#endif
Ben Hutchings8ceee662008-04-27 12:55:59 +01002053 INIT_WORK(&efx->reset_work, efx_reset_work);
2054 INIT_DELAYED_WORK(&efx->monitor_work, efx_monitor);
2055 efx->pci_dev = pci_dev;
Ben Hutchings62776d02010-06-23 11:30:07 +00002056 efx->msg_enable = debug;
Ben Hutchings8ceee662008-04-27 12:55:59 +01002057 efx->state = STATE_INIT;
2058 efx->reset_pending = RESET_TYPE_NONE;
2059 strlcpy(efx->name, pci_name(pci_dev), sizeof(efx->name));
Ben Hutchings8ceee662008-04-27 12:55:59 +01002060
2061 efx->net_dev = net_dev;
Ben Hutchingsdc8cfa52008-09-01 12:46:50 +01002062 efx->rx_checksum_enabled = true;
Ben Hutchings8ceee662008-04-27 12:55:59 +01002063 spin_lock_init(&efx->stats_lock);
2064 mutex_init(&efx->mac_lock);
Steve Hodgsonb895d732009-11-28 05:35:00 +00002065 efx->mac_op = type->default_mac_ops;
Ben Hutchings8ceee662008-04-27 12:55:59 +01002066 efx->phy_op = &efx_dummy_phy_operations;
Ben Hutchings68e7f452009-04-29 08:05:08 +00002067 efx->mdio.dev = net_dev;
Ben Hutchings766ca0f2008-12-12 21:59:24 -08002068 INIT_WORK(&efx->mac_work, efx_mac_work);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002069
2070 for (i = 0; i < EFX_MAX_CHANNELS; i++) {
2071 channel = &efx->channel[i];
2072 channel->efx = efx;
2073 channel->channel = i;
Ben Hutchingsdc8cfa52008-09-01 12:46:50 +01002074 channel->work_pending = false;
Ben Hutchingsa4900ac2010-04-28 09:30:43 +00002075 spin_lock_init(&channel->tx_stop_lock);
2076 atomic_set(&channel->tx_stop_count, 1);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002077 }
Ben Hutchingsa4900ac2010-04-28 09:30:43 +00002078 for (i = 0; i < EFX_MAX_TX_QUEUES; i++) {
Ben Hutchings8ceee662008-04-27 12:55:59 +01002079 tx_queue = &efx->tx_queue[i];
2080 tx_queue->efx = efx;
2081 tx_queue->queue = i;
2082 tx_queue->buffer = NULL;
2083 tx_queue->channel = &efx->channel[0]; /* for safety */
Ben Hutchingsb9b39b62008-05-07 12:51:12 +01002084 tx_queue->tso_headers_free = NULL;
Ben Hutchings8ceee662008-04-27 12:55:59 +01002085 }
2086 for (i = 0; i < EFX_MAX_RX_QUEUES; i++) {
2087 rx_queue = &efx->rx_queue[i];
2088 rx_queue->efx = efx;
2089 rx_queue->queue = i;
2090 rx_queue->channel = &efx->channel[0]; /* for safety */
2091 rx_queue->buffer = NULL;
Steve Hodgson90d683a2010-06-01 11:19:39 +00002092 setup_timer(&rx_queue->slow_fill, efx_rx_slow_fill,
2093 (unsigned long)rx_queue);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002094 }
2095
2096 efx->type = type;
2097
Ben Hutchings8ceee662008-04-27 12:55:59 +01002098 /* As close as we can get to guaranteeing that we don't overflow */
Ben Hutchings3ffeabd2009-10-23 08:30:58 +00002099 BUILD_BUG_ON(EFX_EVQ_SIZE < EFX_TXQ_SIZE + EFX_RXQ_SIZE);
2100
Ben Hutchings8ceee662008-04-27 12:55:59 +01002101 EFX_BUG_ON_PARANOID(efx->type->phys_addr_channels > EFX_MAX_CHANNELS);
2102
2103 /* Higher numbered interrupt modes are less capable! */
2104 efx->interrupt_mode = max(efx->type->max_interrupt_mode,
2105 interrupt_mode);
2106
Ben Hutchings6977dc62008-12-26 13:44:39 -08002107 /* Would be good to use the net_dev name, but we're too early */
2108 snprintf(efx->workqueue_name, sizeof(efx->workqueue_name), "sfc%s",
2109 pci_name(pci_dev));
2110 efx->workqueue = create_singlethread_workqueue(efx->workqueue_name);
Steve Hodgson1ab00622008-12-12 21:33:02 -08002111 if (!efx->workqueue)
2112 return -ENOMEM;
Ben Hutchings8d9853d2008-07-18 19:01:20 +01002113
Ben Hutchings8ceee662008-04-27 12:55:59 +01002114 return 0;
Ben Hutchings8ceee662008-04-27 12:55:59 +01002115}
2116
2117static void efx_fini_struct(struct efx_nic *efx)
2118{
2119 if (efx->workqueue) {
2120 destroy_workqueue(efx->workqueue);
2121 efx->workqueue = NULL;
2122 }
2123}
2124
2125/**************************************************************************
2126 *
2127 * PCI interface
2128 *
2129 **************************************************************************/
2130
2131/* Main body of final NIC shutdown code
2132 * This is called only at module unload (or hotplug removal).
2133 */
2134static void efx_pci_remove_main(struct efx_nic *efx)
2135{
Ben Hutchings152b6a62009-11-29 03:43:56 +00002136 efx_nic_fini_interrupt(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002137 efx_fini_channels(efx);
2138 efx_fini_port(efx);
Ben Hutchingsef2b90e2009-11-29 03:42:31 +00002139 efx->type->fini(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002140 efx_fini_napi(efx);
2141 efx_remove_all(efx);
2142}
2143
2144/* Final NIC shutdown
2145 * This is called only at module unload (or hotplug removal).
2146 */
2147static void efx_pci_remove(struct pci_dev *pci_dev)
2148{
2149 struct efx_nic *efx;
2150
2151 efx = pci_get_drvdata(pci_dev);
2152 if (!efx)
2153 return;
2154
2155 /* Mark the NIC as fini, then stop the interface */
2156 rtnl_lock();
2157 efx->state = STATE_FINI;
2158 dev_close(efx->net_dev);
2159
2160 /* Allow any queued efx_resets() to complete */
2161 rtnl_unlock();
2162
Ben Hutchings8ceee662008-04-27 12:55:59 +01002163 efx_unregister_netdev(efx);
2164
Ben Hutchings7dde5962008-12-12 22:09:38 -08002165 efx_mtd_remove(efx);
2166
Ben Hutchings8ceee662008-04-27 12:55:59 +01002167 /* Wait for any scheduled resets to complete. No more will be
2168 * scheduled from this point because efx_stop_all() has been
2169 * called, we are no longer registered with driverlink, and
2170 * the net_device's have been removed. */
Steve Hodgson1ab00622008-12-12 21:33:02 -08002171 cancel_work_sync(&efx->reset_work);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002172
2173 efx_pci_remove_main(efx);
2174
Ben Hutchings8ceee662008-04-27 12:55:59 +01002175 efx_fini_io(efx);
Ben Hutchings62776d02010-06-23 11:30:07 +00002176 netif_dbg(efx, drv, efx->net_dev, "shutdown successful\n");
Ben Hutchings8ceee662008-04-27 12:55:59 +01002177
2178 pci_set_drvdata(pci_dev, NULL);
2179 efx_fini_struct(efx);
2180 free_netdev(efx->net_dev);
2181};
2182
2183/* Main body of NIC initialisation
2184 * This is called at module load (or hotplug insertion, theoretically).
2185 */
2186static int efx_pci_probe_main(struct efx_nic *efx)
2187{
2188 int rc;
2189
2190 /* Do start-of-day initialisation */
2191 rc = efx_probe_all(efx);
2192 if (rc)
2193 goto fail1;
2194
2195 rc = efx_init_napi(efx);
2196 if (rc)
2197 goto fail2;
2198
Ben Hutchingsef2b90e2009-11-29 03:42:31 +00002199 rc = efx->type->init(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002200 if (rc) {
Ben Hutchings62776d02010-06-23 11:30:07 +00002201 netif_err(efx, probe, efx->net_dev,
2202 "failed to initialise NIC\n");
Ben Hutchings278c0622009-11-23 16:05:12 +00002203 goto fail3;
Ben Hutchings8ceee662008-04-27 12:55:59 +01002204 }
2205
2206 rc = efx_init_port(efx);
2207 if (rc) {
Ben Hutchings62776d02010-06-23 11:30:07 +00002208 netif_err(efx, probe, efx->net_dev,
2209 "failed to initialise port\n");
Ben Hutchings278c0622009-11-23 16:05:12 +00002210 goto fail4;
Ben Hutchings8ceee662008-04-27 12:55:59 +01002211 }
2212
Ben Hutchingsbc3c90a2008-09-01 12:48:46 +01002213 efx_init_channels(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002214
Ben Hutchings152b6a62009-11-29 03:43:56 +00002215 rc = efx_nic_init_interrupt(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002216 if (rc)
Ben Hutchings278c0622009-11-23 16:05:12 +00002217 goto fail5;
Ben Hutchings8ceee662008-04-27 12:55:59 +01002218
2219 return 0;
2220
Ben Hutchings278c0622009-11-23 16:05:12 +00002221 fail5:
Ben Hutchingsbc3c90a2008-09-01 12:48:46 +01002222 efx_fini_channels(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002223 efx_fini_port(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002224 fail4:
Ben Hutchingsef2b90e2009-11-29 03:42:31 +00002225 efx->type->fini(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002226 fail3:
2227 efx_fini_napi(efx);
2228 fail2:
2229 efx_remove_all(efx);
2230 fail1:
2231 return rc;
2232}
2233
2234/* NIC initialisation
2235 *
2236 * This is called at module load (or hotplug insertion,
2237 * theoretically). It sets up PCI mappings, tests and resets the NIC,
2238 * sets up and registers the network devices with the kernel and hooks
2239 * the interrupt service routine. It does not prepare the device for
2240 * transmission; this is left to the first time one of the network
2241 * interfaces is brought up (i.e. efx_net_open).
2242 */
2243static int __devinit efx_pci_probe(struct pci_dev *pci_dev,
2244 const struct pci_device_id *entry)
2245{
2246 struct efx_nic_type *type = (struct efx_nic_type *) entry->driver_data;
2247 struct net_device *net_dev;
2248 struct efx_nic *efx;
2249 int i, rc;
2250
2251 /* Allocate and initialise a struct net_device and struct efx_nic */
Ben Hutchingsa4900ac2010-04-28 09:30:43 +00002252 net_dev = alloc_etherdev_mq(sizeof(*efx), EFX_MAX_CORE_TX_QUEUES);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002253 if (!net_dev)
2254 return -ENOMEM;
Ben Hutchingsc383b532009-11-29 15:11:02 +00002255 net_dev->features |= (type->offload_features | NETIF_F_SG |
Ben Hutchings97bc5412009-05-19 16:19:08 -07002256 NETIF_F_HIGHDMA | NETIF_F_TSO |
2257 NETIF_F_GRO);
Ben Hutchings738a8f42009-11-29 15:16:05 +00002258 if (type->offload_features & NETIF_F_V6_CSUM)
2259 net_dev->features |= NETIF_F_TSO6;
Ben Hutchings285065632008-09-01 12:46:54 +01002260 /* Mask for features that also apply to VLAN devices */
2261 net_dev->vlan_features |= (NETIF_F_ALL_CSUM | NETIF_F_SG |
Ben Hutchings740847d2008-09-01 12:48:23 +01002262 NETIF_F_HIGHDMA | NETIF_F_TSO);
Ben Hutchings767e4682008-09-01 12:43:14 +01002263 efx = netdev_priv(net_dev);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002264 pci_set_drvdata(pci_dev, efx);
Ben Hutchings62776d02010-06-23 11:30:07 +00002265 SET_NETDEV_DEV(net_dev, &pci_dev->dev);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002266 rc = efx_init_struct(efx, type, pci_dev, net_dev);
2267 if (rc)
2268 goto fail1;
2269
Ben Hutchings62776d02010-06-23 11:30:07 +00002270 netif_info(efx, probe, efx->net_dev,
2271 "Solarflare Communications NIC detected\n");
Ben Hutchings8ceee662008-04-27 12:55:59 +01002272
2273 /* Set up basic I/O (BAR mappings etc) */
2274 rc = efx_init_io(efx);
2275 if (rc)
2276 goto fail2;
2277
2278 /* No serialisation is required with the reset path because
2279 * we're in STATE_INIT. */
2280 for (i = 0; i < 5; i++) {
2281 rc = efx_pci_probe_main(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002282
2283 /* Serialise against efx_reset(). No more resets will be
2284 * scheduled since efx_stop_all() has been called, and we
2285 * have not and never have been registered with either
2286 * the rtnetlink or driverlink layers. */
Steve Hodgson1ab00622008-12-12 21:33:02 -08002287 cancel_work_sync(&efx->reset_work);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002288
Steve Hodgsonfa402b22008-12-12 22:08:16 -08002289 if (rc == 0) {
2290 if (efx->reset_pending != RESET_TYPE_NONE) {
2291 /* If there was a scheduled reset during
2292 * probe, the NIC is probably hosed anyway */
2293 efx_pci_remove_main(efx);
2294 rc = -EIO;
2295 } else {
2296 break;
2297 }
2298 }
2299
Ben Hutchings8ceee662008-04-27 12:55:59 +01002300 /* Retry if a recoverably reset event has been scheduled */
2301 if ((efx->reset_pending != RESET_TYPE_INVISIBLE) &&
2302 (efx->reset_pending != RESET_TYPE_ALL))
2303 goto fail3;
2304
2305 efx->reset_pending = RESET_TYPE_NONE;
2306 }
2307
2308 if (rc) {
Ben Hutchings62776d02010-06-23 11:30:07 +00002309 netif_err(efx, probe, efx->net_dev, "Could not reset NIC\n");
Ben Hutchings8ceee662008-04-27 12:55:59 +01002310 goto fail4;
2311 }
2312
Ben Hutchings55edc6e2009-11-25 16:11:35 +00002313 /* Switch to the running state before we expose the device to the OS,
2314 * so that dev_open()|efx_start_all() will actually start the device */
Ben Hutchings8ceee662008-04-27 12:55:59 +01002315 efx->state = STATE_RUNNING;
Ben Hutchings7dde5962008-12-12 22:09:38 -08002316
Ben Hutchings8ceee662008-04-27 12:55:59 +01002317 rc = efx_register_netdev(efx);
2318 if (rc)
2319 goto fail5;
2320
Ben Hutchings62776d02010-06-23 11:30:07 +00002321 netif_dbg(efx, probe, efx->net_dev, "initialisation successful\n");
Ben Hutchingsa5211bb2009-10-23 08:33:09 +00002322
2323 rtnl_lock();
2324 efx_mtd_probe(efx); /* allowed to fail */
2325 rtnl_unlock();
Ben Hutchings8ceee662008-04-27 12:55:59 +01002326 return 0;
2327
2328 fail5:
2329 efx_pci_remove_main(efx);
2330 fail4:
2331 fail3:
2332 efx_fini_io(efx);
2333 fail2:
2334 efx_fini_struct(efx);
2335 fail1:
Steve Hodgson5e2a9112010-02-12 12:32:27 -08002336 WARN_ON(rc > 0);
Ben Hutchings62776d02010-06-23 11:30:07 +00002337 netif_dbg(efx, drv, efx->net_dev, "initialisation failed. rc=%d\n", rc);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002338 free_netdev(net_dev);
2339 return rc;
2340}
2341
Ben Hutchings89c758f2009-11-29 03:43:07 +00002342static int efx_pm_freeze(struct device *dev)
2343{
2344 struct efx_nic *efx = pci_get_drvdata(to_pci_dev(dev));
2345
2346 efx->state = STATE_FINI;
2347
2348 netif_device_detach(efx->net_dev);
2349
2350 efx_stop_all(efx);
2351 efx_fini_channels(efx);
2352
2353 return 0;
2354}
2355
2356static int efx_pm_thaw(struct device *dev)
2357{
2358 struct efx_nic *efx = pci_get_drvdata(to_pci_dev(dev));
2359
2360 efx->state = STATE_INIT;
2361
2362 efx_init_channels(efx);
2363
2364 mutex_lock(&efx->mac_lock);
2365 efx->phy_op->reconfigure(efx);
2366 mutex_unlock(&efx->mac_lock);
2367
2368 efx_start_all(efx);
2369
2370 netif_device_attach(efx->net_dev);
2371
2372 efx->state = STATE_RUNNING;
2373
2374 efx->type->resume_wol(efx);
2375
Steve Hodgson319ba642010-06-01 11:17:24 +00002376 /* Reschedule any quenched resets scheduled during efx_pm_freeze() */
2377 queue_work(reset_workqueue, &efx->reset_work);
2378
Ben Hutchings89c758f2009-11-29 03:43:07 +00002379 return 0;
2380}
2381
2382static int efx_pm_poweroff(struct device *dev)
2383{
2384 struct pci_dev *pci_dev = to_pci_dev(dev);
2385 struct efx_nic *efx = pci_get_drvdata(pci_dev);
2386
2387 efx->type->fini(efx);
2388
2389 efx->reset_pending = RESET_TYPE_NONE;
2390
2391 pci_save_state(pci_dev);
2392 return pci_set_power_state(pci_dev, PCI_D3hot);
2393}
2394
2395/* Used for both resume and restore */
2396static int efx_pm_resume(struct device *dev)
2397{
2398 struct pci_dev *pci_dev = to_pci_dev(dev);
2399 struct efx_nic *efx = pci_get_drvdata(pci_dev);
2400 int rc;
2401
2402 rc = pci_set_power_state(pci_dev, PCI_D0);
2403 if (rc)
2404 return rc;
2405 pci_restore_state(pci_dev);
2406 rc = pci_enable_device(pci_dev);
2407 if (rc)
2408 return rc;
2409 pci_set_master(efx->pci_dev);
2410 rc = efx->type->reset(efx, RESET_TYPE_ALL);
2411 if (rc)
2412 return rc;
2413 rc = efx->type->init(efx);
2414 if (rc)
2415 return rc;
2416 efx_pm_thaw(dev);
2417 return 0;
2418}
2419
2420static int efx_pm_suspend(struct device *dev)
2421{
2422 int rc;
2423
2424 efx_pm_freeze(dev);
2425 rc = efx_pm_poweroff(dev);
2426 if (rc)
2427 efx_pm_resume(dev);
2428 return rc;
2429}
2430
2431static struct dev_pm_ops efx_pm_ops = {
2432 .suspend = efx_pm_suspend,
2433 .resume = efx_pm_resume,
2434 .freeze = efx_pm_freeze,
2435 .thaw = efx_pm_thaw,
2436 .poweroff = efx_pm_poweroff,
2437 .restore = efx_pm_resume,
2438};
2439
Ben Hutchings8ceee662008-04-27 12:55:59 +01002440static struct pci_driver efx_pci_driver = {
Ben Hutchingsc5d5f5f2010-06-23 11:30:26 +00002441 .name = KBUILD_MODNAME,
Ben Hutchings8ceee662008-04-27 12:55:59 +01002442 .id_table = efx_pci_table,
2443 .probe = efx_pci_probe,
2444 .remove = efx_pci_remove,
Ben Hutchings89c758f2009-11-29 03:43:07 +00002445 .driver.pm = &efx_pm_ops,
Ben Hutchings8ceee662008-04-27 12:55:59 +01002446};
2447
2448/**************************************************************************
2449 *
2450 * Kernel module interface
2451 *
2452 *************************************************************************/
2453
2454module_param(interrupt_mode, uint, 0444);
2455MODULE_PARM_DESC(interrupt_mode,
2456 "Interrupt mode (0=>MSIX 1=>MSI 2=>legacy)");
2457
2458static int __init efx_init_module(void)
2459{
2460 int rc;
2461
2462 printk(KERN_INFO "Solarflare NET driver v" EFX_DRIVER_VERSION "\n");
2463
2464 rc = register_netdevice_notifier(&efx_netdev_notifier);
2465 if (rc)
2466 goto err_notifier;
2467
Steve Hodgson1ab00622008-12-12 21:33:02 -08002468 reset_workqueue = create_singlethread_workqueue("sfc_reset");
2469 if (!reset_workqueue) {
2470 rc = -ENOMEM;
2471 goto err_reset;
2472 }
Ben Hutchings8ceee662008-04-27 12:55:59 +01002473
2474 rc = pci_register_driver(&efx_pci_driver);
2475 if (rc < 0)
2476 goto err_pci;
2477
2478 return 0;
2479
2480 err_pci:
Steve Hodgson1ab00622008-12-12 21:33:02 -08002481 destroy_workqueue(reset_workqueue);
2482 err_reset:
Ben Hutchings8ceee662008-04-27 12:55:59 +01002483 unregister_netdevice_notifier(&efx_netdev_notifier);
2484 err_notifier:
2485 return rc;
2486}
2487
2488static void __exit efx_exit_module(void)
2489{
2490 printk(KERN_INFO "Solarflare NET driver unloading\n");
2491
2492 pci_unregister_driver(&efx_pci_driver);
Steve Hodgson1ab00622008-12-12 21:33:02 -08002493 destroy_workqueue(reset_workqueue);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002494 unregister_netdevice_notifier(&efx_netdev_notifier);
2495
2496}
2497
2498module_init(efx_init_module);
2499module_exit(efx_exit_module);
2500
Ben Hutchings906bb262009-11-29 15:16:19 +00002501MODULE_AUTHOR("Solarflare Communications and "
2502 "Michael Brown <mbrown@fensystems.co.uk>");
Ben Hutchings8ceee662008-04-27 12:55:59 +01002503MODULE_DESCRIPTION("Solarflare Communications network driver");
2504MODULE_LICENSE("GPL");
2505MODULE_DEVICE_TABLE(pci, efx_pci_table);