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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 Hutchings0a6f40c2011-02-25 00:01:34 +00004 * Copyright 2005-2011 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 Hutchings64d8ad62011-01-05 00:50:41 +000024#include <linux/cpu_rmap.h>
Ben Hutchings8ceee662008-04-27 12:55:59 +010025#include "net_driver.h"
Ben Hutchings8ceee662008-04-27 12:55:59 +010026#include "efx.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
Ben Hutchingsc4593022009-11-23 16:08:17 +000071const unsigned int efx_reset_type_max = RESET_TYPE_MAX;
72const char *efx_reset_type_names[] = {
73 [RESET_TYPE_INVISIBLE] = "INVISIBLE",
74 [RESET_TYPE_ALL] = "ALL",
75 [RESET_TYPE_WORLD] = "WORLD",
76 [RESET_TYPE_DISABLE] = "DISABLE",
77 [RESET_TYPE_TX_WATCHDOG] = "TX_WATCHDOG",
78 [RESET_TYPE_INT_ERROR] = "INT_ERROR",
79 [RESET_TYPE_RX_RECOVERY] = "RX_RECOVERY",
80 [RESET_TYPE_RX_DESC_FETCH] = "RX_DESC_FETCH",
81 [RESET_TYPE_TX_DESC_FETCH] = "TX_DESC_FETCH",
82 [RESET_TYPE_TX_SKIP] = "TX_SKIP",
Ben Hutchings8880f4e2009-11-29 15:15:41 +000083 [RESET_TYPE_MC_FAILURE] = "MC_FAILURE",
Ben Hutchingsc4593022009-11-23 16:08:17 +000084};
85
Ben Hutchings8ceee662008-04-27 12:55:59 +010086#define EFX_MAX_MTU (9 * 1024)
87
Steve Hodgson1ab00622008-12-12 21:33:02 -080088/* Reset workqueue. If any NIC has a hardware failure then a reset will be
89 * queued onto this work queue. This is not a per-nic work queue, because
90 * efx_reset_work() acquires the rtnl lock, so resets are naturally serialised.
91 */
92static struct workqueue_struct *reset_workqueue;
93
Ben Hutchings8ceee662008-04-27 12:55:59 +010094/**************************************************************************
95 *
96 * Configurable values
97 *
98 *************************************************************************/
99
100/*
Ben Hutchings8ceee662008-04-27 12:55:59 +0100101 * Use separate channels for TX and RX events
102 *
Neil Turton28b581a2008-12-12 21:41:06 -0800103 * Set this to 1 to use separate channels for TX and RX. It allows us
104 * to control interrupt affinity separately for TX and RX.
Ben Hutchings8ceee662008-04-27 12:55:59 +0100105 *
Neil Turton28b581a2008-12-12 21:41:06 -0800106 * This is only used in MSI-X interrupt mode
Ben Hutchings8ceee662008-04-27 12:55:59 +0100107 */
Neil Turton28b581a2008-12-12 21:41:06 -0800108static unsigned int separate_tx_channels;
Ben Hutchings8313aca2010-09-10 06:41:57 +0000109module_param(separate_tx_channels, uint, 0444);
Neil Turton28b581a2008-12-12 21:41:06 -0800110MODULE_PARM_DESC(separate_tx_channels,
111 "Use separate channels for TX and RX");
Ben Hutchings8ceee662008-04-27 12:55:59 +0100112
113/* This is the weight assigned to each of the (per-channel) virtual
114 * NAPI devices.
115 */
116static int napi_weight = 64;
117
118/* This is the time (in jiffies) between invocations of the hardware
Ben Hutchingse254c272010-09-20 08:44:10 +0000119 * monitor. On Falcon-based NICs, this will:
120 * - Check the on-board hardware monitor;
121 * - Poll the link state and reconfigure the hardware as necessary.
Ben Hutchings8ceee662008-04-27 12:55:59 +0100122 */
stephen hemmingerd2156972010-10-18 05:27:31 +0000123static unsigned int efx_monitor_interval = 1 * HZ;
Ben Hutchings8ceee662008-04-27 12:55:59 +0100124
Ben Hutchings8ceee662008-04-27 12:55:59 +0100125/* This controls whether or not the driver will initialise devices
126 * with invalid MAC addresses stored in the EEPROM or flash. If true,
127 * such devices will be initialised with a random locally-generated
128 * MAC address. This allows for loading the sfc_mtd driver to
129 * reprogram the flash, even if the flash contents (including the MAC
130 * address) have previously been erased.
131 */
132static unsigned int allow_bad_hwaddr;
133
134/* Initial interrupt moderation settings. They can be modified after
135 * module load with ethtool.
136 *
137 * The default for RX should strike a balance between increasing the
138 * round-trip latency and reducing overhead.
139 */
140static unsigned int rx_irq_mod_usec = 60;
141
142/* Initial interrupt moderation settings. They can be modified after
143 * module load with ethtool.
144 *
145 * This default is chosen to ensure that a 10G link does not go idle
146 * while a TX queue is stopped after it has become full. A queue is
147 * restarted when it drops below half full. The time this takes (assuming
148 * worst case 3 descriptors per packet and 1024 descriptors) is
149 * 512 / 3 * 1.2 = 205 usec.
150 */
151static unsigned int tx_irq_mod_usec = 150;
152
153/* This is the first interrupt mode to try out of:
154 * 0 => MSI-X
155 * 1 => MSI
156 * 2 => legacy
157 */
158static unsigned int interrupt_mode;
159
160/* This is the requested number of CPUs to use for Receive-Side Scaling (RSS),
161 * i.e. the number of CPUs among which we may distribute simultaneous
162 * interrupt handling.
163 *
164 * Cards without MSI-X will only target one CPU via legacy or MSI interrupt.
165 * The default (0) means to assign an interrupt to each package (level II cache)
166 */
167static unsigned int rss_cpus;
168module_param(rss_cpus, uint, 0444);
169MODULE_PARM_DESC(rss_cpus, "Number of CPUs to use for Receive-Side Scaling");
170
Ben Hutchings84ae48f2008-12-12 21:34:54 -0800171static int phy_flash_cfg;
172module_param(phy_flash_cfg, int, 0644);
173MODULE_PARM_DESC(phy_flash_cfg, "Set PHYs into reflash mode initially");
174
Ben Hutchings6fb70fd2009-03-20 13:30:37 +0000175static unsigned irq_adapt_low_thresh = 10000;
176module_param(irq_adapt_low_thresh, uint, 0644);
177MODULE_PARM_DESC(irq_adapt_low_thresh,
178 "Threshold score for reducing IRQ moderation");
179
180static unsigned irq_adapt_high_thresh = 20000;
181module_param(irq_adapt_high_thresh, uint, 0644);
182MODULE_PARM_DESC(irq_adapt_high_thresh,
183 "Threshold score for increasing IRQ moderation");
184
Ben Hutchings62776d02010-06-23 11:30:07 +0000185static unsigned debug = (NETIF_MSG_DRV | NETIF_MSG_PROBE |
186 NETIF_MSG_LINK | NETIF_MSG_IFDOWN |
187 NETIF_MSG_IFUP | NETIF_MSG_RX_ERR |
188 NETIF_MSG_TX_ERR | NETIF_MSG_HW);
189module_param(debug, uint, 0);
190MODULE_PARM_DESC(debug, "Bitmapped debugging message enable value");
191
Ben Hutchings8ceee662008-04-27 12:55:59 +0100192/**************************************************************************
193 *
194 * Utility functions and prototypes
195 *
196 *************************************************************************/
Ben Hutchings46426102010-09-10 06:42:33 +0000197
198static void efx_remove_channels(struct efx_nic *efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100199static void efx_remove_port(struct efx_nic *efx);
Ben Hutchingse8f14992010-12-07 19:47:34 +0000200static void efx_init_napi(struct efx_nic *efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100201static void efx_fini_napi(struct efx_nic *efx);
Ben Hutchingse8f14992010-12-07 19:47:34 +0000202static void efx_fini_napi_channel(struct efx_channel *channel);
Ben Hutchings46426102010-09-10 06:42:33 +0000203static void efx_fini_struct(struct efx_nic *efx);
204static void efx_start_all(struct efx_nic *efx);
205static void efx_stop_all(struct efx_nic *efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100206
207#define EFX_ASSERT_RESET_SERIALISED(efx) \
208 do { \
Ben Hutchings332c1ce2009-11-25 16:08:52 +0000209 if ((efx->state == STATE_RUNNING) || \
210 (efx->state == STATE_DISABLED)) \
Ben Hutchings8ceee662008-04-27 12:55:59 +0100211 ASSERT_RTNL(); \
212 } while (0)
213
214/**************************************************************************
215 *
216 * Event queue processing
217 *
218 *************************************************************************/
219
220/* Process channel's event queue
221 *
222 * This function is responsible for processing the event queue of a
223 * single channel. The caller must guarantee that this function will
224 * never be concurrently called more than once on the same channel,
225 * though different channels may be being processed concurrently.
226 */
Ben Hutchingsfa236e12010-04-28 09:29:42 +0000227static int efx_process_channel(struct efx_channel *channel, int budget)
Ben Hutchings8ceee662008-04-27 12:55:59 +0100228{
Ben Hutchings42cbe2d2008-09-01 12:48:08 +0100229 struct efx_nic *efx = channel->efx;
Ben Hutchingsfa236e12010-04-28 09:29:42 +0000230 int spent;
Ben Hutchings8ceee662008-04-27 12:55:59 +0100231
Ben Hutchings42cbe2d2008-09-01 12:48:08 +0100232 if (unlikely(efx->reset_pending != RESET_TYPE_NONE ||
Ben Hutchings8ceee662008-04-27 12:55:59 +0100233 !channel->enabled))
Ben Hutchings42cbe2d2008-09-01 12:48:08 +0100234 return 0;
Ben Hutchings8ceee662008-04-27 12:55:59 +0100235
Ben Hutchingsfa236e12010-04-28 09:29:42 +0000236 spent = efx_nic_process_eventq(channel, budget);
237 if (spent == 0)
Ben Hutchings42cbe2d2008-09-01 12:48:08 +0100238 return 0;
Ben Hutchings8ceee662008-04-27 12:55:59 +0100239
240 /* Deliver last RX packet. */
241 if (channel->rx_pkt) {
242 __efx_rx_packet(channel, channel->rx_pkt,
243 channel->rx_pkt_csummed);
244 channel->rx_pkt = NULL;
245 }
246
Ben Hutchings8ceee662008-04-27 12:55:59 +0100247 efx_rx_strategy(channel);
248
Ben Hutchingsf7d12cd2010-09-10 06:41:47 +0000249 efx_fast_push_rx_descriptors(efx_channel_get_rx_queue(channel));
Ben Hutchings8ceee662008-04-27 12:55:59 +0100250
Ben Hutchingsfa236e12010-04-28 09:29:42 +0000251 return spent;
Ben Hutchings8ceee662008-04-27 12:55:59 +0100252}
253
254/* Mark channel as finished processing
255 *
256 * Note that since we will not receive further interrupts for this
257 * channel before we finish processing and call the eventq_read_ack()
258 * method, there is no need to use the interrupt hold-off timers.
259 */
260static inline void efx_channel_processed(struct efx_channel *channel)
261{
Ben Hutchings5b9e2072008-05-16 21:18:14 +0100262 /* The interrupt handler for this channel may set work_pending
263 * as soon as we acknowledge the events we've seen. Make sure
264 * it's cleared before then. */
Ben Hutchingsdc8cfa52008-09-01 12:46:50 +0100265 channel->work_pending = false;
Ben Hutchings5b9e2072008-05-16 21:18:14 +0100266 smp_wmb();
267
Ben Hutchings152b6a62009-11-29 03:43:56 +0000268 efx_nic_eventq_read_ack(channel);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100269}
270
271/* NAPI poll handler
272 *
273 * NAPI guarantees serialisation of polls of the same device, which
274 * provides the guarantee required by efx_process_channel().
275 */
276static int efx_poll(struct napi_struct *napi, int budget)
277{
278 struct efx_channel *channel =
279 container_of(napi, struct efx_channel, napi_str);
Ben Hutchings62776d02010-06-23 11:30:07 +0000280 struct efx_nic *efx = channel->efx;
Ben Hutchingsfa236e12010-04-28 09:29:42 +0000281 int spent;
Ben Hutchings8ceee662008-04-27 12:55:59 +0100282
Ben Hutchings62776d02010-06-23 11:30:07 +0000283 netif_vdbg(efx, intr, efx->net_dev,
284 "channel %d NAPI poll executing on CPU %d\n",
285 channel->channel, raw_smp_processor_id());
Ben Hutchings8ceee662008-04-27 12:55:59 +0100286
Ben Hutchingsfa236e12010-04-28 09:29:42 +0000287 spent = efx_process_channel(channel, budget);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100288
Ben Hutchingsfa236e12010-04-28 09:29:42 +0000289 if (spent < budget) {
Ben Hutchingsa4900ac2010-04-28 09:30:43 +0000290 if (channel->channel < efx->n_rx_channels &&
Ben Hutchings6fb70fd2009-03-20 13:30:37 +0000291 efx->irq_rx_adaptive &&
292 unlikely(++channel->irq_count == 1000)) {
Ben Hutchings6fb70fd2009-03-20 13:30:37 +0000293 if (unlikely(channel->irq_mod_score <
294 irq_adapt_low_thresh)) {
Ben Hutchings0d86ebd2009-10-23 08:32:13 +0000295 if (channel->irq_moderation > 1) {
296 channel->irq_moderation -= 1;
Ben Hutchingsef2b90e2009-11-29 03:42:31 +0000297 efx->type->push_irq_moderation(channel);
Ben Hutchings0d86ebd2009-10-23 08:32:13 +0000298 }
Ben Hutchings6fb70fd2009-03-20 13:30:37 +0000299 } else if (unlikely(channel->irq_mod_score >
300 irq_adapt_high_thresh)) {
Ben Hutchings0d86ebd2009-10-23 08:32:13 +0000301 if (channel->irq_moderation <
302 efx->irq_rx_moderation) {
303 channel->irq_moderation += 1;
Ben Hutchingsef2b90e2009-11-29 03:42:31 +0000304 efx->type->push_irq_moderation(channel);
Ben Hutchings0d86ebd2009-10-23 08:32:13 +0000305 }
Ben Hutchings6fb70fd2009-03-20 13:30:37 +0000306 }
Ben Hutchings6fb70fd2009-03-20 13:30:37 +0000307 channel->irq_count = 0;
308 channel->irq_mod_score = 0;
309 }
310
Ben Hutchings64d8ad62011-01-05 00:50:41 +0000311 efx_filter_rfs_expire(channel);
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 Hutchings8313aca2010-09-10 06:41:57 +0000337 BUG_ON(channel->channel >= efx->n_channels);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100338 BUG_ON(!channel->enabled);
339
340 /* Disable interrupts and wait for ISRs to complete */
Ben Hutchings152b6a62009-11-29 03:43:56 +0000341 efx_nic_disable_interrupts(efx);
Ben Hutchings94dec6a2010-12-07 19:24:45 +0000342 if (efx->legacy_irq) {
Ben Hutchings8ceee662008-04-27 12:55:59 +0100343 synchronize_irq(efx->legacy_irq);
Ben Hutchings94dec6a2010-12-07 19:24:45 +0000344 efx->legacy_irq_enabled = false;
345 }
Ben Hutchings64ee3122008-09-01 12:47:38 +0100346 if (channel->irq)
Ben Hutchings8ceee662008-04-27 12:55:59 +0100347 synchronize_irq(channel->irq);
348
349 /* Wait for any NAPI processing to complete */
350 napi_disable(&channel->napi_str);
351
352 /* Poll the channel */
Steve Hodgsonecc910f2010-09-10 06:42:22 +0000353 efx_process_channel(channel, channel->eventq_mask + 1);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100354
355 /* Ack the eventq. This may cause an interrupt to be generated
356 * when they are reenabled */
357 efx_channel_processed(channel);
358
359 napi_enable(&channel->napi_str);
Ben Hutchings94dec6a2010-12-07 19:24:45 +0000360 if (efx->legacy_irq)
361 efx->legacy_irq_enabled = true;
Ben Hutchings152b6a62009-11-29 03:43:56 +0000362 efx_nic_enable_interrupts(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100363}
364
365/* Create event queue
366 * Event queue memory allocations are done only once. If the channel
367 * is reset, the memory buffer will be reused; this guards against
368 * errors during channel reset and also simplifies interrupt handling.
369 */
370static int efx_probe_eventq(struct efx_channel *channel)
371{
Steve Hodgsonecc910f2010-09-10 06:42:22 +0000372 struct efx_nic *efx = channel->efx;
373 unsigned long entries;
374
Ben Hutchings62776d02010-06-23 11:30:07 +0000375 netif_dbg(channel->efx, probe, channel->efx->net_dev,
376 "chan %d create event queue\n", channel->channel);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100377
Steve Hodgsonecc910f2010-09-10 06:42:22 +0000378 /* Build an event queue with room for one event per tx and rx buffer,
379 * plus some extra for link state events and MCDI completions. */
380 entries = roundup_pow_of_two(efx->rxq_entries + efx->txq_entries + 128);
381 EFX_BUG_ON_PARANOID(entries > EFX_MAX_EVQ_SIZE);
382 channel->eventq_mask = max(entries, EFX_MIN_EVQ_SIZE) - 1;
383
Ben Hutchings152b6a62009-11-29 03:43:56 +0000384 return efx_nic_probe_eventq(channel);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100385}
386
387/* Prepare channel's event queue */
Ben Hutchingsbc3c90a2008-09-01 12:48:46 +0100388static void efx_init_eventq(struct efx_channel *channel)
Ben Hutchings8ceee662008-04-27 12:55:59 +0100389{
Ben Hutchings62776d02010-06-23 11:30:07 +0000390 netif_dbg(channel->efx, drv, channel->efx->net_dev,
391 "chan %d init event queue\n", channel->channel);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100392
393 channel->eventq_read_ptr = 0;
394
Ben Hutchings152b6a62009-11-29 03:43:56 +0000395 efx_nic_init_eventq(channel);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100396}
397
398static void efx_fini_eventq(struct efx_channel *channel)
399{
Ben Hutchings62776d02010-06-23 11:30:07 +0000400 netif_dbg(channel->efx, drv, channel->efx->net_dev,
401 "chan %d fini event queue\n", channel->channel);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100402
Ben Hutchings152b6a62009-11-29 03:43:56 +0000403 efx_nic_fini_eventq(channel);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100404}
405
406static void efx_remove_eventq(struct efx_channel *channel)
407{
Ben Hutchings62776d02010-06-23 11:30:07 +0000408 netif_dbg(channel->efx, drv, channel->efx->net_dev,
409 "chan %d remove event queue\n", channel->channel);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100410
Ben Hutchings152b6a62009-11-29 03:43:56 +0000411 efx_nic_remove_eventq(channel);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100412}
413
414/**************************************************************************
415 *
416 * Channel handling
417 *
418 *************************************************************************/
419
Ben Hutchings46426102010-09-10 06:42:33 +0000420/* Allocate and initialise a channel structure, optionally copying
421 * parameters (but not resources) from an old channel structure. */
422static struct efx_channel *
423efx_alloc_channel(struct efx_nic *efx, int i, struct efx_channel *old_channel)
424{
425 struct efx_channel *channel;
426 struct efx_rx_queue *rx_queue;
427 struct efx_tx_queue *tx_queue;
428 int j;
429
430 if (old_channel) {
431 channel = kmalloc(sizeof(*channel), GFP_KERNEL);
432 if (!channel)
433 return NULL;
434
435 *channel = *old_channel;
436
Ben Hutchingse8f14992010-12-07 19:47:34 +0000437 channel->napi_dev = NULL;
Ben Hutchings46426102010-09-10 06:42:33 +0000438 memset(&channel->eventq, 0, sizeof(channel->eventq));
439
440 rx_queue = &channel->rx_queue;
441 rx_queue->buffer = NULL;
442 memset(&rx_queue->rxd, 0, sizeof(rx_queue->rxd));
443
444 for (j = 0; j < EFX_TXQ_TYPES; j++) {
445 tx_queue = &channel->tx_queue[j];
446 if (tx_queue->channel)
447 tx_queue->channel = channel;
448 tx_queue->buffer = NULL;
449 memset(&tx_queue->txd, 0, sizeof(tx_queue->txd));
450 }
451 } else {
452 channel = kzalloc(sizeof(*channel), GFP_KERNEL);
453 if (!channel)
454 return NULL;
455
456 channel->efx = efx;
457 channel->channel = i;
458
459 for (j = 0; j < EFX_TXQ_TYPES; j++) {
460 tx_queue = &channel->tx_queue[j];
461 tx_queue->efx = efx;
462 tx_queue->queue = i * EFX_TXQ_TYPES + j;
463 tx_queue->channel = channel;
464 }
465 }
466
Ben Hutchings46426102010-09-10 06:42:33 +0000467 rx_queue = &channel->rx_queue;
468 rx_queue->efx = efx;
469 setup_timer(&rx_queue->slow_fill, efx_rx_slow_fill,
470 (unsigned long)rx_queue);
471
472 return channel;
473}
474
Ben Hutchings8ceee662008-04-27 12:55:59 +0100475static int efx_probe_channel(struct efx_channel *channel)
476{
477 struct efx_tx_queue *tx_queue;
478 struct efx_rx_queue *rx_queue;
479 int rc;
480
Ben Hutchings62776d02010-06-23 11:30:07 +0000481 netif_dbg(channel->efx, probe, channel->efx->net_dev,
482 "creating channel %d\n", channel->channel);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100483
484 rc = efx_probe_eventq(channel);
485 if (rc)
486 goto fail1;
487
488 efx_for_each_channel_tx_queue(tx_queue, channel) {
489 rc = efx_probe_tx_queue(tx_queue);
490 if (rc)
491 goto fail2;
492 }
493
494 efx_for_each_channel_rx_queue(rx_queue, channel) {
495 rc = efx_probe_rx_queue(rx_queue);
496 if (rc)
497 goto fail3;
498 }
499
500 channel->n_rx_frm_trunc = 0;
501
502 return 0;
503
504 fail3:
505 efx_for_each_channel_rx_queue(rx_queue, channel)
506 efx_remove_rx_queue(rx_queue);
507 fail2:
508 efx_for_each_channel_tx_queue(tx_queue, channel)
509 efx_remove_tx_queue(tx_queue);
510 fail1:
511 return rc;
512}
513
514
Ben Hutchings56536e92008-12-12 21:37:02 -0800515static void efx_set_channel_names(struct efx_nic *efx)
516{
517 struct efx_channel *channel;
518 const char *type = "";
519 int number;
520
521 efx_for_each_channel(channel, efx) {
522 number = channel->channel;
Ben Hutchingsa4900ac2010-04-28 09:30:43 +0000523 if (efx->n_channels > efx->n_rx_channels) {
524 if (channel->channel < efx->n_rx_channels) {
Ben Hutchings56536e92008-12-12 21:37:02 -0800525 type = "-rx";
526 } else {
527 type = "-tx";
Ben Hutchingsa4900ac2010-04-28 09:30:43 +0000528 number -= efx->n_rx_channels;
Ben Hutchings56536e92008-12-12 21:37:02 -0800529 }
530 }
Ben Hutchings46426102010-09-10 06:42:33 +0000531 snprintf(efx->channel_name[channel->channel],
532 sizeof(efx->channel_name[0]),
Ben Hutchings56536e92008-12-12 21:37:02 -0800533 "%s%s-%d", efx->name, type, number);
534 }
535}
536
Ben Hutchings46426102010-09-10 06:42:33 +0000537static int efx_probe_channels(struct efx_nic *efx)
538{
539 struct efx_channel *channel;
540 int rc;
541
542 /* Restart special buffer allocation */
543 efx->next_buffer_table = 0;
544
545 efx_for_each_channel(channel, efx) {
546 rc = efx_probe_channel(channel);
547 if (rc) {
548 netif_err(efx, probe, efx->net_dev,
549 "failed to create channel %d\n",
550 channel->channel);
551 goto fail;
552 }
553 }
554 efx_set_channel_names(efx);
555
556 return 0;
557
558fail:
559 efx_remove_channels(efx);
560 return rc;
561}
562
Ben Hutchings8ceee662008-04-27 12:55:59 +0100563/* Channels are shutdown and reinitialised whilst the NIC is running
564 * to propagate configuration changes (mtu, checksum offload), or
565 * to clear hardware error conditions
566 */
Ben Hutchingsbc3c90a2008-09-01 12:48:46 +0100567static void efx_init_channels(struct efx_nic *efx)
Ben Hutchings8ceee662008-04-27 12:55:59 +0100568{
569 struct efx_tx_queue *tx_queue;
570 struct efx_rx_queue *rx_queue;
571 struct efx_channel *channel;
Ben Hutchings8ceee662008-04-27 12:55:59 +0100572
Ben Hutchingsf7f13b02008-05-16 21:15:06 +0100573 /* Calculate the rx buffer allocation parameters required to
574 * support the current MTU, including padding for header
575 * alignment and overruns.
576 */
577 efx->rx_buffer_len = (max(EFX_PAGE_IP_ALIGN, NET_IP_ALIGN) +
578 EFX_MAX_FRAME_LEN(efx->net_dev->mtu) +
Ben Hutchings39c9cf02010-06-23 11:31:28 +0000579 efx->type->rx_buffer_hash_size +
Ben Hutchingsf7f13b02008-05-16 21:15:06 +0100580 efx->type->rx_buffer_padding);
Steve Hodgson62b330b2010-06-01 11:20:53 +0000581 efx->rx_buffer_order = get_order(efx->rx_buffer_len +
582 sizeof(struct efx_rx_page_state));
Ben Hutchings8ceee662008-04-27 12:55:59 +0100583
584 /* Initialise the channels */
585 efx_for_each_channel(channel, efx) {
Ben Hutchings62776d02010-06-23 11:30:07 +0000586 netif_dbg(channel->efx, drv, channel->efx->net_dev,
587 "init chan %d\n", channel->channel);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100588
Ben Hutchingsbc3c90a2008-09-01 12:48:46 +0100589 efx_init_eventq(channel);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100590
Ben Hutchingsbc3c90a2008-09-01 12:48:46 +0100591 efx_for_each_channel_tx_queue(tx_queue, channel)
592 efx_init_tx_queue(tx_queue);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100593
594 /* The rx buffer allocation strategy is MTU dependent */
595 efx_rx_strategy(channel);
596
Ben Hutchingsbc3c90a2008-09-01 12:48:46 +0100597 efx_for_each_channel_rx_queue(rx_queue, channel)
598 efx_init_rx_queue(rx_queue);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100599
600 WARN_ON(channel->rx_pkt != NULL);
601 efx_rx_strategy(channel);
602 }
Ben Hutchings8ceee662008-04-27 12:55:59 +0100603}
604
605/* This enables event queue processing and packet transmission.
606 *
607 * Note that this function is not allowed to fail, since that would
608 * introduce too much complexity into the suspend/resume path.
609 */
610static void efx_start_channel(struct efx_channel *channel)
611{
612 struct efx_rx_queue *rx_queue;
613
Ben Hutchings62776d02010-06-23 11:30:07 +0000614 netif_dbg(channel->efx, ifup, channel->efx->net_dev,
615 "starting chan %d\n", channel->channel);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100616
Ben Hutchings5b9e2072008-05-16 21:18:14 +0100617 /* The interrupt handler for this channel may set work_pending
618 * as soon as we enable it. Make sure it's cleared before
619 * then. Similarly, make sure it sees the enabled flag set. */
Ben Hutchingsdc8cfa52008-09-01 12:46:50 +0100620 channel->work_pending = false;
621 channel->enabled = true;
Ben Hutchings5b9e2072008-05-16 21:18:14 +0100622 smp_wmb();
Ben Hutchings8ceee662008-04-27 12:55:59 +0100623
Steve Hodgson90d683a2010-06-01 11:19:39 +0000624 /* Fill the queues before enabling NAPI */
Ben Hutchings8ceee662008-04-27 12:55:59 +0100625 efx_for_each_channel_rx_queue(rx_queue, channel)
626 efx_fast_push_rx_descriptors(rx_queue);
Steve Hodgson90d683a2010-06-01 11:19:39 +0000627
628 napi_enable(&channel->napi_str);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100629}
630
631/* This disables event queue processing and packet transmission.
632 * This function does not guarantee that all queue processing
633 * (e.g. RX refill) is complete.
634 */
635static void efx_stop_channel(struct efx_channel *channel)
636{
Ben Hutchings8ceee662008-04-27 12:55:59 +0100637 if (!channel->enabled)
638 return;
639
Ben Hutchings62776d02010-06-23 11:30:07 +0000640 netif_dbg(channel->efx, ifdown, channel->efx->net_dev,
641 "stop chan %d\n", channel->channel);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100642
Ben Hutchingsdc8cfa52008-09-01 12:46:50 +0100643 channel->enabled = false;
Ben Hutchings8ceee662008-04-27 12:55:59 +0100644 napi_disable(&channel->napi_str);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100645}
646
647static void efx_fini_channels(struct efx_nic *efx)
648{
649 struct efx_channel *channel;
650 struct efx_tx_queue *tx_queue;
651 struct efx_rx_queue *rx_queue;
Ben Hutchings6bc5d3a2008-09-01 12:49:37 +0100652 int rc;
Ben Hutchings8ceee662008-04-27 12:55:59 +0100653
654 EFX_ASSERT_RESET_SERIALISED(efx);
655 BUG_ON(efx->port_enabled);
656
Ben Hutchings152b6a62009-11-29 03:43:56 +0000657 rc = efx_nic_flush_queues(efx);
Steve Hodgsonfd371e32010-06-01 11:17:51 +0000658 if (rc && EFX_WORKAROUND_7803(efx)) {
659 /* Schedule a reset to recover from the flush failure. The
660 * descriptor caches reference memory we're about to free,
661 * but falcon_reconfigure_mac_wrapper() won't reconnect
662 * the MACs because of the pending reset. */
Ben Hutchings62776d02010-06-23 11:30:07 +0000663 netif_err(efx, drv, efx->net_dev,
664 "Resetting to recover from flush failure\n");
Steve Hodgsonfd371e32010-06-01 11:17:51 +0000665 efx_schedule_reset(efx, RESET_TYPE_ALL);
666 } else if (rc) {
Ben Hutchings62776d02010-06-23 11:30:07 +0000667 netif_err(efx, drv, efx->net_dev, "failed to flush queues\n");
Steve Hodgsonfd371e32010-06-01 11:17:51 +0000668 } else {
Ben Hutchings62776d02010-06-23 11:30:07 +0000669 netif_dbg(efx, drv, efx->net_dev,
670 "successfully flushed all queues\n");
Steve Hodgsonfd371e32010-06-01 11:17:51 +0000671 }
Ben Hutchings6bc5d3a2008-09-01 12:49:37 +0100672
Ben Hutchings8ceee662008-04-27 12:55:59 +0100673 efx_for_each_channel(channel, efx) {
Ben Hutchings62776d02010-06-23 11:30:07 +0000674 netif_dbg(channel->efx, drv, channel->efx->net_dev,
675 "shut down chan %d\n", channel->channel);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100676
677 efx_for_each_channel_rx_queue(rx_queue, channel)
678 efx_fini_rx_queue(rx_queue);
Ben Hutchings94b274b2011-01-10 21:18:20 +0000679 efx_for_each_possible_channel_tx_queue(tx_queue, channel)
Ben Hutchings8ceee662008-04-27 12:55:59 +0100680 efx_fini_tx_queue(tx_queue);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100681 efx_fini_eventq(channel);
682 }
683}
684
685static void efx_remove_channel(struct efx_channel *channel)
686{
687 struct efx_tx_queue *tx_queue;
688 struct efx_rx_queue *rx_queue;
689
Ben Hutchings62776d02010-06-23 11:30:07 +0000690 netif_dbg(channel->efx, drv, channel->efx->net_dev,
691 "destroy chan %d\n", channel->channel);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100692
693 efx_for_each_channel_rx_queue(rx_queue, channel)
694 efx_remove_rx_queue(rx_queue);
Ben Hutchings94b274b2011-01-10 21:18:20 +0000695 efx_for_each_possible_channel_tx_queue(tx_queue, channel)
Ben Hutchings8ceee662008-04-27 12:55:59 +0100696 efx_remove_tx_queue(tx_queue);
697 efx_remove_eventq(channel);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100698}
699
Ben Hutchings46426102010-09-10 06:42:33 +0000700static void efx_remove_channels(struct efx_nic *efx)
701{
702 struct efx_channel *channel;
703
704 efx_for_each_channel(channel, efx)
705 efx_remove_channel(channel);
706}
707
708int
709efx_realloc_channels(struct efx_nic *efx, u32 rxq_entries, u32 txq_entries)
710{
711 struct efx_channel *other_channel[EFX_MAX_CHANNELS], *channel;
712 u32 old_rxq_entries, old_txq_entries;
713 unsigned i;
714 int rc;
715
716 efx_stop_all(efx);
717 efx_fini_channels(efx);
718
719 /* Clone channels */
720 memset(other_channel, 0, sizeof(other_channel));
721 for (i = 0; i < efx->n_channels; i++) {
722 channel = efx_alloc_channel(efx, i, efx->channel[i]);
723 if (!channel) {
724 rc = -ENOMEM;
725 goto out;
726 }
727 other_channel[i] = channel;
728 }
729
730 /* Swap entry counts and channel pointers */
731 old_rxq_entries = efx->rxq_entries;
732 old_txq_entries = efx->txq_entries;
733 efx->rxq_entries = rxq_entries;
734 efx->txq_entries = txq_entries;
735 for (i = 0; i < efx->n_channels; i++) {
736 channel = efx->channel[i];
737 efx->channel[i] = other_channel[i];
738 other_channel[i] = channel;
739 }
740
741 rc = efx_probe_channels(efx);
742 if (rc)
743 goto rollback;
744
Ben Hutchingse8f14992010-12-07 19:47:34 +0000745 efx_init_napi(efx);
746
Ben Hutchings46426102010-09-10 06:42:33 +0000747 /* Destroy old channels */
Ben Hutchingse8f14992010-12-07 19:47:34 +0000748 for (i = 0; i < efx->n_channels; i++) {
749 efx_fini_napi_channel(other_channel[i]);
Ben Hutchings46426102010-09-10 06:42:33 +0000750 efx_remove_channel(other_channel[i]);
Ben Hutchingse8f14992010-12-07 19:47:34 +0000751 }
Ben Hutchings46426102010-09-10 06:42:33 +0000752out:
753 /* Free unused channel structures */
754 for (i = 0; i < efx->n_channels; i++)
755 kfree(other_channel[i]);
756
757 efx_init_channels(efx);
758 efx_start_all(efx);
759 return rc;
760
761rollback:
762 /* Swap back */
763 efx->rxq_entries = old_rxq_entries;
764 efx->txq_entries = old_txq_entries;
765 for (i = 0; i < efx->n_channels; i++) {
766 channel = efx->channel[i];
767 efx->channel[i] = other_channel[i];
768 other_channel[i] = channel;
769 }
770 goto out;
771}
772
Steve Hodgson90d683a2010-06-01 11:19:39 +0000773void efx_schedule_slow_fill(struct efx_rx_queue *rx_queue)
Ben Hutchings8ceee662008-04-27 12:55:59 +0100774{
Steve Hodgson90d683a2010-06-01 11:19:39 +0000775 mod_timer(&rx_queue->slow_fill, jiffies + msecs_to_jiffies(100));
Ben Hutchings8ceee662008-04-27 12:55:59 +0100776}
777
778/**************************************************************************
779 *
780 * Port handling
781 *
782 **************************************************************************/
783
784/* This ensures that the kernel is kept informed (via
785 * netif_carrier_on/off) of the link status, and also maintains the
786 * link status's stop on the port's TX queue.
787 */
Steve Hodgsonfdaa9ae2009-11-28 05:34:05 +0000788void efx_link_status_changed(struct efx_nic *efx)
Ben Hutchings8ceee662008-04-27 12:55:59 +0100789{
Ben Hutchingseb50c0d2009-11-23 16:06:30 +0000790 struct efx_link_state *link_state = &efx->link_state;
791
Ben Hutchings8ceee662008-04-27 12:55:59 +0100792 /* SFC Bug 5356: A net_dev notifier is registered, so we must ensure
793 * that no events are triggered between unregister_netdev() and the
794 * driver unloading. A more general condition is that NETDEV_CHANGE
795 * can only be generated between NETDEV_UP and NETDEV_DOWN */
796 if (!netif_running(efx->net_dev))
797 return;
798
Ben Hutchings8c8661e2008-09-01 12:49:02 +0100799 if (efx->port_inhibited) {
800 netif_carrier_off(efx->net_dev);
801 return;
802 }
803
Ben Hutchingseb50c0d2009-11-23 16:06:30 +0000804 if (link_state->up != netif_carrier_ok(efx->net_dev)) {
Ben Hutchings8ceee662008-04-27 12:55:59 +0100805 efx->n_link_state_changes++;
806
Ben Hutchingseb50c0d2009-11-23 16:06:30 +0000807 if (link_state->up)
Ben Hutchings8ceee662008-04-27 12:55:59 +0100808 netif_carrier_on(efx->net_dev);
809 else
810 netif_carrier_off(efx->net_dev);
811 }
812
813 /* Status message for kernel log */
Ben Hutchingseb50c0d2009-11-23 16:06:30 +0000814 if (link_state->up) {
Ben Hutchings62776d02010-06-23 11:30:07 +0000815 netif_info(efx, link, efx->net_dev,
816 "link up at %uMbps %s-duplex (MTU %d)%s\n",
817 link_state->speed, link_state->fd ? "full" : "half",
818 efx->net_dev->mtu,
819 (efx->promiscuous ? " [PROMISC]" : ""));
Ben Hutchings8ceee662008-04-27 12:55:59 +0100820 } else {
Ben Hutchings62776d02010-06-23 11:30:07 +0000821 netif_info(efx, link, efx->net_dev, "link down\n");
Ben Hutchings8ceee662008-04-27 12:55:59 +0100822 }
823
824}
825
Ben Hutchingsd3245b22009-11-29 03:42:41 +0000826void efx_link_set_advertising(struct efx_nic *efx, u32 advertising)
827{
828 efx->link_advertising = advertising;
829 if (advertising) {
830 if (advertising & ADVERTISED_Pause)
831 efx->wanted_fc |= (EFX_FC_TX | EFX_FC_RX);
832 else
833 efx->wanted_fc &= ~(EFX_FC_TX | EFX_FC_RX);
834 if (advertising & ADVERTISED_Asym_Pause)
835 efx->wanted_fc ^= EFX_FC_TX;
836 }
837}
838
839void efx_link_set_wanted_fc(struct efx_nic *efx, enum efx_fc_type wanted_fc)
840{
841 efx->wanted_fc = wanted_fc;
842 if (efx->link_advertising) {
843 if (wanted_fc & EFX_FC_RX)
844 efx->link_advertising |= (ADVERTISED_Pause |
845 ADVERTISED_Asym_Pause);
846 else
847 efx->link_advertising &= ~(ADVERTISED_Pause |
848 ADVERTISED_Asym_Pause);
849 if (wanted_fc & EFX_FC_TX)
850 efx->link_advertising ^= ADVERTISED_Asym_Pause;
851 }
852}
853
Ben Hutchings115122a2009-03-04 09:52:52 +0000854static void efx_fini_port(struct efx_nic *efx);
855
Ben Hutchingsd3245b22009-11-29 03:42:41 +0000856/* Push loopback/power/transmit disable settings to the PHY, and reconfigure
857 * the MAC appropriately. All other PHY configuration changes are pushed
858 * through phy_op->set_settings(), and pushed asynchronously to the MAC
859 * through efx_monitor().
860 *
861 * Callers must hold the mac_lock
862 */
863int __efx_reconfigure_port(struct efx_nic *efx)
Ben Hutchings8ceee662008-04-27 12:55:59 +0100864{
Ben Hutchingsd3245b22009-11-29 03:42:41 +0000865 enum efx_phy_mode phy_mode;
866 int rc;
Ben Hutchings8ceee662008-04-27 12:55:59 +0100867
Ben Hutchingsd3245b22009-11-29 03:42:41 +0000868 WARN_ON(!mutex_is_locked(&efx->mac_lock));
Ben Hutchings8ceee662008-04-27 12:55:59 +0100869
Ben Hutchingsa816f752008-09-01 12:49:12 +0100870 /* Serialise the promiscuous flag with efx_set_multicast_list. */
871 if (efx_dev_registered(efx)) {
872 netif_addr_lock_bh(efx->net_dev);
873 netif_addr_unlock_bh(efx->net_dev);
874 }
875
Ben Hutchingsd3245b22009-11-29 03:42:41 +0000876 /* Disable PHY transmit in mac level loopbacks */
877 phy_mode = efx->phy_mode;
Ben Hutchings177dfcd2008-12-12 21:50:08 -0800878 if (LOOPBACK_INTERNAL(efx))
879 efx->phy_mode |= PHY_MODE_TX_DISABLED;
880 else
881 efx->phy_mode &= ~PHY_MODE_TX_DISABLED;
Ben Hutchings177dfcd2008-12-12 21:50:08 -0800882
Ben Hutchingsd3245b22009-11-29 03:42:41 +0000883 rc = efx->type->reconfigure_port(efx);
Ben Hutchings177dfcd2008-12-12 21:50:08 -0800884
Ben Hutchingsd3245b22009-11-29 03:42:41 +0000885 if (rc)
886 efx->phy_mode = phy_mode;
Ben Hutchings8ceee662008-04-27 12:55:59 +0100887
Ben Hutchingsd3245b22009-11-29 03:42:41 +0000888 return rc;
Ben Hutchings8ceee662008-04-27 12:55:59 +0100889}
890
891/* Reinitialise the MAC to pick up new PHY settings, even if the port is
892 * disabled. */
Ben Hutchingsd3245b22009-11-29 03:42:41 +0000893int efx_reconfigure_port(struct efx_nic *efx)
Ben Hutchings8ceee662008-04-27 12:55:59 +0100894{
Ben Hutchingsd3245b22009-11-29 03:42:41 +0000895 int rc;
896
Ben Hutchings8ceee662008-04-27 12:55:59 +0100897 EFX_ASSERT_RESET_SERIALISED(efx);
898
899 mutex_lock(&efx->mac_lock);
Ben Hutchingsd3245b22009-11-29 03:42:41 +0000900 rc = __efx_reconfigure_port(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100901 mutex_unlock(&efx->mac_lock);
Ben Hutchingsd3245b22009-11-29 03:42:41 +0000902
903 return rc;
Ben Hutchings8ceee662008-04-27 12:55:59 +0100904}
905
Ben Hutchings8be4f3e2009-11-25 16:12:16 +0000906/* Asynchronous work item for changing MAC promiscuity and multicast
907 * hash. Avoid a drain/rx_ingress enable by reconfiguring the current
908 * MAC directly. */
Ben Hutchings766ca0f2008-12-12 21:59:24 -0800909static void efx_mac_work(struct work_struct *data)
910{
911 struct efx_nic *efx = container_of(data, struct efx_nic, mac_work);
912
913 mutex_lock(&efx->mac_lock);
Ben Hutchings8be4f3e2009-11-25 16:12:16 +0000914 if (efx->port_enabled) {
Ben Hutchingsef2b90e2009-11-29 03:42:31 +0000915 efx->type->push_multicast_hash(efx);
Ben Hutchings8be4f3e2009-11-25 16:12:16 +0000916 efx->mac_op->reconfigure(efx);
917 }
Ben Hutchings766ca0f2008-12-12 21:59:24 -0800918 mutex_unlock(&efx->mac_lock);
919}
920
Ben Hutchings8ceee662008-04-27 12:55:59 +0100921static int efx_probe_port(struct efx_nic *efx)
922{
Ben Hutchings7e300bc2010-12-02 13:48:28 +0000923 unsigned char *perm_addr;
Ben Hutchings8ceee662008-04-27 12:55:59 +0100924 int rc;
925
Ben Hutchings62776d02010-06-23 11:30:07 +0000926 netif_dbg(efx, probe, efx->net_dev, "create port\n");
Ben Hutchings8ceee662008-04-27 12:55:59 +0100927
Steve Hodgsonff3b00a2009-12-23 13:46:36 +0000928 if (phy_flash_cfg)
929 efx->phy_mode = PHY_MODE_SPECIAL;
930
Ben Hutchingsef2b90e2009-11-29 03:42:31 +0000931 /* Connect up MAC/PHY operations table */
932 rc = efx->type->probe_port(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100933 if (rc)
Ben Hutchingse42de262010-09-10 06:41:19 +0000934 return rc;
Ben Hutchings8ceee662008-04-27 12:55:59 +0100935
936 /* Sanity check MAC address */
Ben Hutchings7e300bc2010-12-02 13:48:28 +0000937 perm_addr = efx->net_dev->perm_addr;
938 if (is_valid_ether_addr(perm_addr)) {
939 memcpy(efx->net_dev->dev_addr, perm_addr, ETH_ALEN);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100940 } else {
Ben Hutchings62776d02010-06-23 11:30:07 +0000941 netif_err(efx, probe, efx->net_dev, "invalid MAC address %pM\n",
Ben Hutchings7e300bc2010-12-02 13:48:28 +0000942 perm_addr);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100943 if (!allow_bad_hwaddr) {
944 rc = -EINVAL;
945 goto err;
946 }
947 random_ether_addr(efx->net_dev->dev_addr);
Ben Hutchings62776d02010-06-23 11:30:07 +0000948 netif_info(efx, probe, efx->net_dev,
949 "using locally-generated MAC %pM\n",
950 efx->net_dev->dev_addr);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100951 }
952
953 return 0;
954
955 err:
Ben Hutchingse42de262010-09-10 06:41:19 +0000956 efx->type->remove_port(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100957 return rc;
958}
959
960static int efx_init_port(struct efx_nic *efx)
961{
962 int rc;
963
Ben Hutchings62776d02010-06-23 11:30:07 +0000964 netif_dbg(efx, drv, efx->net_dev, "init port\n");
Ben Hutchings8ceee662008-04-27 12:55:59 +0100965
Ben Hutchings1dfc5ce2009-11-25 16:11:19 +0000966 mutex_lock(&efx->mac_lock);
967
Ben Hutchings177dfcd2008-12-12 21:50:08 -0800968 rc = efx->phy_op->init(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100969 if (rc)
Ben Hutchings1dfc5ce2009-11-25 16:11:19 +0000970 goto fail1;
Ben Hutchings8ceee662008-04-27 12:55:59 +0100971
Ben Hutchingsdc8cfa52008-09-01 12:46:50 +0100972 efx->port_initialized = true;
Ben Hutchings1dfc5ce2009-11-25 16:11:19 +0000973
Ben Hutchingsd3245b22009-11-29 03:42:41 +0000974 /* Reconfigure the MAC before creating dma queues (required for
975 * Falcon/A1 where RX_INGR_EN/TX_DRAIN_EN isn't supported) */
976 efx->mac_op->reconfigure(efx);
977
978 /* Ensure the PHY advertises the correct flow control settings */
979 rc = efx->phy_op->reconfigure(efx);
980 if (rc)
981 goto fail2;
982
Ben Hutchings1dfc5ce2009-11-25 16:11:19 +0000983 mutex_unlock(&efx->mac_lock);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100984 return 0;
Ben Hutchings177dfcd2008-12-12 21:50:08 -0800985
Ben Hutchings1dfc5ce2009-11-25 16:11:19 +0000986fail2:
Ben Hutchings177dfcd2008-12-12 21:50:08 -0800987 efx->phy_op->fini(efx);
Ben Hutchings1dfc5ce2009-11-25 16:11:19 +0000988fail1:
989 mutex_unlock(&efx->mac_lock);
Ben Hutchings177dfcd2008-12-12 21:50:08 -0800990 return rc;
Ben Hutchings8ceee662008-04-27 12:55:59 +0100991}
992
Ben Hutchings8ceee662008-04-27 12:55:59 +0100993static void efx_start_port(struct efx_nic *efx)
994{
Ben Hutchings62776d02010-06-23 11:30:07 +0000995 netif_dbg(efx, ifup, efx->net_dev, "start port\n");
Ben Hutchings8ceee662008-04-27 12:55:59 +0100996 BUG_ON(efx->port_enabled);
997
998 mutex_lock(&efx->mac_lock);
Ben Hutchingsdc8cfa52008-09-01 12:46:50 +0100999 efx->port_enabled = true;
Ben Hutchings8be4f3e2009-11-25 16:12:16 +00001000
1001 /* efx_mac_work() might have been scheduled after efx_stop_port(),
1002 * and then cancelled by efx_flush_all() */
Ben Hutchingsef2b90e2009-11-29 03:42:31 +00001003 efx->type->push_multicast_hash(efx);
Ben Hutchings8be4f3e2009-11-25 16:12:16 +00001004 efx->mac_op->reconfigure(efx);
1005
Ben Hutchings8ceee662008-04-27 12:55:59 +01001006 mutex_unlock(&efx->mac_lock);
1007}
1008
Steve Hodgsonfdaa9ae2009-11-28 05:34:05 +00001009/* Prevent efx_mac_work() and efx_monitor() from working */
Ben Hutchings8ceee662008-04-27 12:55:59 +01001010static void efx_stop_port(struct efx_nic *efx)
1011{
Ben Hutchings62776d02010-06-23 11:30:07 +00001012 netif_dbg(efx, ifdown, efx->net_dev, "stop port\n");
Ben Hutchings8ceee662008-04-27 12:55:59 +01001013
1014 mutex_lock(&efx->mac_lock);
Ben Hutchingsdc8cfa52008-09-01 12:46:50 +01001015 efx->port_enabled = false;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001016 mutex_unlock(&efx->mac_lock);
1017
1018 /* Serialise against efx_set_multicast_list() */
Ben Hutchings55668612008-05-16 21:16:10 +01001019 if (efx_dev_registered(efx)) {
David S. Millerb9e40852008-07-15 00:15:08 -07001020 netif_addr_lock_bh(efx->net_dev);
1021 netif_addr_unlock_bh(efx->net_dev);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001022 }
1023}
1024
1025static void efx_fini_port(struct efx_nic *efx)
1026{
Ben Hutchings62776d02010-06-23 11:30:07 +00001027 netif_dbg(efx, drv, efx->net_dev, "shut down port\n");
Ben Hutchings8ceee662008-04-27 12:55:59 +01001028
1029 if (!efx->port_initialized)
1030 return;
1031
Ben Hutchings177dfcd2008-12-12 21:50:08 -08001032 efx->phy_op->fini(efx);
Ben Hutchingsdc8cfa52008-09-01 12:46:50 +01001033 efx->port_initialized = false;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001034
Ben Hutchingseb50c0d2009-11-23 16:06:30 +00001035 efx->link_state.up = false;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001036 efx_link_status_changed(efx);
1037}
1038
1039static void efx_remove_port(struct efx_nic *efx)
1040{
Ben Hutchings62776d02010-06-23 11:30:07 +00001041 netif_dbg(efx, drv, efx->net_dev, "destroying port\n");
Ben Hutchings8ceee662008-04-27 12:55:59 +01001042
Ben Hutchingsef2b90e2009-11-29 03:42:31 +00001043 efx->type->remove_port(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001044}
1045
1046/**************************************************************************
1047 *
1048 * NIC handling
1049 *
1050 **************************************************************************/
1051
1052/* This configures the PCI device to enable I/O and DMA. */
1053static int efx_init_io(struct efx_nic *efx)
1054{
1055 struct pci_dev *pci_dev = efx->pci_dev;
1056 dma_addr_t dma_mask = efx->type->max_dma_mask;
Steve Hodgsond88d6b02011-03-22 19:46:43 +00001057 bool use_wc;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001058 int rc;
1059
Ben Hutchings62776d02010-06-23 11:30:07 +00001060 netif_dbg(efx, probe, efx->net_dev, "initialising I/O\n");
Ben Hutchings8ceee662008-04-27 12:55:59 +01001061
1062 rc = pci_enable_device(pci_dev);
1063 if (rc) {
Ben Hutchings62776d02010-06-23 11:30:07 +00001064 netif_err(efx, probe, efx->net_dev,
1065 "failed to enable PCI device\n");
Ben Hutchings8ceee662008-04-27 12:55:59 +01001066 goto fail1;
1067 }
1068
1069 pci_set_master(pci_dev);
1070
1071 /* Set the PCI DMA mask. Try all possibilities from our
1072 * genuine mask down to 32 bits, because some architectures
1073 * (e.g. x86_64 with iommu_sac_force set) will allow 40 bit
1074 * masks event though they reject 46 bit masks.
1075 */
1076 while (dma_mask > 0x7fffffffUL) {
1077 if (pci_dma_supported(pci_dev, dma_mask) &&
1078 ((rc = pci_set_dma_mask(pci_dev, dma_mask)) == 0))
1079 break;
1080 dma_mask >>= 1;
1081 }
1082 if (rc) {
Ben Hutchings62776d02010-06-23 11:30:07 +00001083 netif_err(efx, probe, efx->net_dev,
1084 "could not find a suitable DMA mask\n");
Ben Hutchings8ceee662008-04-27 12:55:59 +01001085 goto fail2;
1086 }
Ben Hutchings62776d02010-06-23 11:30:07 +00001087 netif_dbg(efx, probe, efx->net_dev,
1088 "using DMA mask %llx\n", (unsigned long long) dma_mask);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001089 rc = pci_set_consistent_dma_mask(pci_dev, dma_mask);
1090 if (rc) {
1091 /* pci_set_consistent_dma_mask() is not *allowed* to
1092 * fail with a mask that pci_set_dma_mask() accepted,
1093 * but just in case...
1094 */
Ben Hutchings62776d02010-06-23 11:30:07 +00001095 netif_err(efx, probe, efx->net_dev,
1096 "failed to set consistent DMA mask\n");
Ben Hutchings8ceee662008-04-27 12:55:59 +01001097 goto fail2;
1098 }
1099
Ben Hutchingsdc803df2009-10-23 08:32:33 +00001100 efx->membase_phys = pci_resource_start(efx->pci_dev, EFX_MEM_BAR);
1101 rc = pci_request_region(pci_dev, EFX_MEM_BAR, "sfc");
Ben Hutchings8ceee662008-04-27 12:55:59 +01001102 if (rc) {
Ben Hutchings62776d02010-06-23 11:30:07 +00001103 netif_err(efx, probe, efx->net_dev,
1104 "request for memory BAR failed\n");
Ben Hutchings8ceee662008-04-27 12:55:59 +01001105 rc = -EIO;
1106 goto fail3;
1107 }
Steve Hodgsond88d6b02011-03-22 19:46:43 +00001108
1109 /* bug22643: If SR-IOV is enabled then tx push over a write combined
1110 * mapping is unsafe. We need to disable write combining in this case.
1111 * MSI is unsupported when SR-IOV is enabled, and the firmware will
1112 * have removed the MSI capability. So write combining is safe if
1113 * there is an MSI capability.
1114 */
1115 use_wc = (!EFX_WORKAROUND_22643(efx) ||
1116 pci_find_capability(pci_dev, PCI_CAP_ID_MSI));
1117 if (use_wc)
1118 efx->membase = ioremap_wc(efx->membase_phys,
1119 efx->type->mem_map_size);
1120 else
1121 efx->membase = ioremap_nocache(efx->membase_phys,
1122 efx->type->mem_map_size);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001123 if (!efx->membase) {
Ben Hutchings62776d02010-06-23 11:30:07 +00001124 netif_err(efx, probe, efx->net_dev,
1125 "could not map memory BAR at %llx+%x\n",
1126 (unsigned long long)efx->membase_phys,
1127 efx->type->mem_map_size);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001128 rc = -ENOMEM;
1129 goto fail4;
1130 }
Ben Hutchings62776d02010-06-23 11:30:07 +00001131 netif_dbg(efx, probe, efx->net_dev,
1132 "memory BAR at %llx+%x (virtual %p)\n",
1133 (unsigned long long)efx->membase_phys,
1134 efx->type->mem_map_size, efx->membase);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001135
1136 return 0;
1137
1138 fail4:
Ben Hutchingsdc803df2009-10-23 08:32:33 +00001139 pci_release_region(efx->pci_dev, EFX_MEM_BAR);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001140 fail3:
Ben Hutchings2c118e02008-05-16 21:15:29 +01001141 efx->membase_phys = 0;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001142 fail2:
1143 pci_disable_device(efx->pci_dev);
1144 fail1:
1145 return rc;
1146}
1147
1148static void efx_fini_io(struct efx_nic *efx)
1149{
Ben Hutchings62776d02010-06-23 11:30:07 +00001150 netif_dbg(efx, drv, efx->net_dev, "shutting down I/O\n");
Ben Hutchings8ceee662008-04-27 12:55:59 +01001151
1152 if (efx->membase) {
1153 iounmap(efx->membase);
1154 efx->membase = NULL;
1155 }
1156
1157 if (efx->membase_phys) {
Ben Hutchingsdc803df2009-10-23 08:32:33 +00001158 pci_release_region(efx->pci_dev, EFX_MEM_BAR);
Ben Hutchings2c118e02008-05-16 21:15:29 +01001159 efx->membase_phys = 0;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001160 }
1161
1162 pci_disable_device(efx->pci_dev);
1163}
1164
Ben Hutchingsa4900ac2010-04-28 09:30:43 +00001165/* Get number of channels wanted. Each channel will have its own IRQ,
1166 * 1 RX queue and/or 2 TX queues. */
1167static int efx_wanted_channels(void)
Ben Hutchings46123d02008-09-01 12:47:33 +01001168{
Rusty Russell2f8975f2009-01-10 21:58:09 -08001169 cpumask_var_t core_mask;
Ben Hutchings46123d02008-09-01 12:47:33 +01001170 int count;
1171 int cpu;
1172
Ben Hutchings5b874e22011-01-12 19:11:05 +00001173 if (rss_cpus)
1174 return rss_cpus;
1175
Li Zefan79f55992009-06-15 14:58:26 +08001176 if (unlikely(!zalloc_cpumask_var(&core_mask, GFP_KERNEL))) {
Rusty Russell2f8975f2009-01-10 21:58:09 -08001177 printk(KERN_WARNING
Mike Travis3977d032009-05-12 10:48:36 +00001178 "sfc: RSS disabled due to allocation failure\n");
Rusty Russell2f8975f2009-01-10 21:58:09 -08001179 return 1;
1180 }
1181
Ben Hutchings46123d02008-09-01 12:47:33 +01001182 count = 0;
1183 for_each_online_cpu(cpu) {
Rusty Russell2f8975f2009-01-10 21:58:09 -08001184 if (!cpumask_test_cpu(cpu, core_mask)) {
Ben Hutchings46123d02008-09-01 12:47:33 +01001185 ++count;
Rusty Russell2f8975f2009-01-10 21:58:09 -08001186 cpumask_or(core_mask, core_mask,
Rusty Russellfbd59a82009-01-10 21:58:08 -08001187 topology_core_cpumask(cpu));
Ben Hutchings46123d02008-09-01 12:47:33 +01001188 }
1189 }
1190
Rusty Russell2f8975f2009-01-10 21:58:09 -08001191 free_cpumask_var(core_mask);
Ben Hutchings46123d02008-09-01 12:47:33 +01001192 return count;
1193}
1194
Ben Hutchings64d8ad62011-01-05 00:50:41 +00001195static int
1196efx_init_rx_cpu_rmap(struct efx_nic *efx, struct msix_entry *xentries)
1197{
1198#ifdef CONFIG_RFS_ACCEL
1199 int i, rc;
1200
1201 efx->net_dev->rx_cpu_rmap = alloc_irq_cpu_rmap(efx->n_rx_channels);
1202 if (!efx->net_dev->rx_cpu_rmap)
1203 return -ENOMEM;
1204 for (i = 0; i < efx->n_rx_channels; i++) {
1205 rc = irq_cpu_rmap_add(efx->net_dev->rx_cpu_rmap,
1206 xentries[i].vector);
1207 if (rc) {
1208 free_irq_cpu_rmap(efx->net_dev->rx_cpu_rmap);
1209 efx->net_dev->rx_cpu_rmap = NULL;
1210 return rc;
1211 }
1212 }
1213#endif
1214 return 0;
1215}
1216
Ben Hutchings46123d02008-09-01 12:47:33 +01001217/* Probe the number and type of interrupts we are able to obtain, and
1218 * the resulting numbers of channels and RX queues.
1219 */
Ben Hutchings64d8ad62011-01-05 00:50:41 +00001220static int efx_probe_interrupts(struct efx_nic *efx)
Ben Hutchings8ceee662008-04-27 12:55:59 +01001221{
Ben Hutchings46123d02008-09-01 12:47:33 +01001222 int max_channels =
1223 min_t(int, efx->type->phys_addr_channels, EFX_MAX_CHANNELS);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001224 int rc, i;
1225
1226 if (efx->interrupt_mode == EFX_INT_MODE_MSIX) {
Ben Hutchings46123d02008-09-01 12:47:33 +01001227 struct msix_entry xentries[EFX_MAX_CHANNELS];
Ben Hutchingsa4900ac2010-04-28 09:30:43 +00001228 int n_channels;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001229
Ben Hutchingsa4900ac2010-04-28 09:30:43 +00001230 n_channels = efx_wanted_channels();
1231 if (separate_tx_channels)
1232 n_channels *= 2;
1233 n_channels = min(n_channels, max_channels);
Ben Hutchingsaa6ef272008-07-18 19:03:10 +01001234
Ben Hutchingsa4900ac2010-04-28 09:30:43 +00001235 for (i = 0; i < n_channels; i++)
Ben Hutchings8ceee662008-04-27 12:55:59 +01001236 xentries[i].entry = i;
Ben Hutchingsa4900ac2010-04-28 09:30:43 +00001237 rc = pci_enable_msix(efx->pci_dev, xentries, n_channels);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001238 if (rc > 0) {
Ben Hutchings62776d02010-06-23 11:30:07 +00001239 netif_err(efx, drv, efx->net_dev,
1240 "WARNING: Insufficient MSI-X vectors"
1241 " available (%d < %d).\n", rc, n_channels);
1242 netif_err(efx, drv, efx->net_dev,
1243 "WARNING: Performance may be reduced.\n");
Ben Hutchingsa4900ac2010-04-28 09:30:43 +00001244 EFX_BUG_ON_PARANOID(rc >= n_channels);
1245 n_channels = rc;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001246 rc = pci_enable_msix(efx->pci_dev, xentries,
Ben Hutchingsa4900ac2010-04-28 09:30:43 +00001247 n_channels);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001248 }
1249
1250 if (rc == 0) {
Ben Hutchingsa4900ac2010-04-28 09:30:43 +00001251 efx->n_channels = n_channels;
1252 if (separate_tx_channels) {
1253 efx->n_tx_channels =
1254 max(efx->n_channels / 2, 1U);
1255 efx->n_rx_channels =
1256 max(efx->n_channels -
1257 efx->n_tx_channels, 1U);
1258 } else {
1259 efx->n_tx_channels = efx->n_channels;
1260 efx->n_rx_channels = efx->n_channels;
1261 }
Ben Hutchings64d8ad62011-01-05 00:50:41 +00001262 rc = efx_init_rx_cpu_rmap(efx, xentries);
1263 if (rc) {
1264 pci_disable_msix(efx->pci_dev);
1265 return rc;
1266 }
Ben Hutchingsa4900ac2010-04-28 09:30:43 +00001267 for (i = 0; i < n_channels; i++)
Ben Hutchingsf7d12cd2010-09-10 06:41:47 +00001268 efx_get_channel(efx, i)->irq =
1269 xentries[i].vector;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001270 } else {
1271 /* Fall back to single channel MSI */
1272 efx->interrupt_mode = EFX_INT_MODE_MSI;
Ben Hutchings62776d02010-06-23 11:30:07 +00001273 netif_err(efx, drv, efx->net_dev,
1274 "could not enable MSI-X\n");
Ben Hutchings8ceee662008-04-27 12:55:59 +01001275 }
1276 }
1277
1278 /* Try single interrupt MSI */
1279 if (efx->interrupt_mode == EFX_INT_MODE_MSI) {
Neil Turton28b581a2008-12-12 21:41:06 -08001280 efx->n_channels = 1;
Ben Hutchingsa4900ac2010-04-28 09:30:43 +00001281 efx->n_rx_channels = 1;
1282 efx->n_tx_channels = 1;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001283 rc = pci_enable_msi(efx->pci_dev);
1284 if (rc == 0) {
Ben Hutchingsf7d12cd2010-09-10 06:41:47 +00001285 efx_get_channel(efx, 0)->irq = efx->pci_dev->irq;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001286 } else {
Ben Hutchings62776d02010-06-23 11:30:07 +00001287 netif_err(efx, drv, efx->net_dev,
1288 "could not enable MSI\n");
Ben Hutchings8ceee662008-04-27 12:55:59 +01001289 efx->interrupt_mode = EFX_INT_MODE_LEGACY;
1290 }
1291 }
1292
1293 /* Assume legacy interrupts */
1294 if (efx->interrupt_mode == EFX_INT_MODE_LEGACY) {
Neil Turton28b581a2008-12-12 21:41:06 -08001295 efx->n_channels = 1 + (separate_tx_channels ? 1 : 0);
Ben Hutchingsa4900ac2010-04-28 09:30:43 +00001296 efx->n_rx_channels = 1;
1297 efx->n_tx_channels = 1;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001298 efx->legacy_irq = efx->pci_dev->irq;
1299 }
Ben Hutchings64d8ad62011-01-05 00:50:41 +00001300
1301 return 0;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001302}
1303
1304static void efx_remove_interrupts(struct efx_nic *efx)
1305{
1306 struct efx_channel *channel;
1307
1308 /* Remove MSI/MSI-X interrupts */
Ben Hutchings64ee3122008-09-01 12:47:38 +01001309 efx_for_each_channel(channel, efx)
Ben Hutchings8ceee662008-04-27 12:55:59 +01001310 channel->irq = 0;
1311 pci_disable_msi(efx->pci_dev);
1312 pci_disable_msix(efx->pci_dev);
1313
1314 /* Remove legacy interrupt */
1315 efx->legacy_irq = 0;
1316}
1317
Ben Hutchings8831da72008-09-01 12:47:48 +01001318static void efx_set_channels(struct efx_nic *efx)
Ben Hutchings8ceee662008-04-27 12:55:59 +01001319{
Ben Hutchings97653432011-01-12 18:26:56 +00001320 efx->tx_channel_offset =
Ben Hutchingsa4900ac2010-04-28 09:30:43 +00001321 separate_tx_channels ? efx->n_channels - efx->n_tx_channels : 0;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001322}
1323
1324static int efx_probe_nic(struct efx_nic *efx)
1325{
Ben Hutchings765c9f42010-06-30 05:06:28 +00001326 size_t i;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001327 int rc;
1328
Ben Hutchings62776d02010-06-23 11:30:07 +00001329 netif_dbg(efx, probe, efx->net_dev, "creating NIC\n");
Ben Hutchings8ceee662008-04-27 12:55:59 +01001330
1331 /* Carry out hardware-type specific initialisation */
Ben Hutchingsef2b90e2009-11-29 03:42:31 +00001332 rc = efx->type->probe(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001333 if (rc)
1334 return rc;
1335
Ben Hutchingsa4900ac2010-04-28 09:30:43 +00001336 /* Determine the number of channels and queues by trying to hook
Ben Hutchings8ceee662008-04-27 12:55:59 +01001337 * in MSI-X interrupts. */
Ben Hutchings64d8ad62011-01-05 00:50:41 +00001338 rc = efx_probe_interrupts(efx);
1339 if (rc)
1340 goto fail;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001341
Ben Hutchings5d3a6fc2010-06-25 07:05:43 +00001342 if (efx->n_channels > 1)
1343 get_random_bytes(&efx->rx_hash_key, sizeof(efx->rx_hash_key));
Ben Hutchings765c9f42010-06-30 05:06:28 +00001344 for (i = 0; i < ARRAY_SIZE(efx->rx_indir_table); i++)
1345 efx->rx_indir_table[i] = i % efx->n_rx_channels;
Ben Hutchings5d3a6fc2010-06-25 07:05:43 +00001346
Ben Hutchings8831da72008-09-01 12:47:48 +01001347 efx_set_channels(efx);
Ben Hutchingsc4f4adc2010-09-27 08:31:07 +00001348 netif_set_real_num_tx_queues(efx->net_dev, efx->n_tx_channels);
1349 netif_set_real_num_rx_queues(efx->net_dev, efx->n_rx_channels);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001350
1351 /* Initialise the interrupt moderation settings */
Ben Hutchings6fb70fd2009-03-20 13:30:37 +00001352 efx_init_irq_moderation(efx, tx_irq_mod_usec, rx_irq_mod_usec, true);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001353
1354 return 0;
Ben Hutchings64d8ad62011-01-05 00:50:41 +00001355
1356fail:
1357 efx->type->remove(efx);
1358 return rc;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001359}
1360
1361static void efx_remove_nic(struct efx_nic *efx)
1362{
Ben Hutchings62776d02010-06-23 11:30:07 +00001363 netif_dbg(efx, drv, efx->net_dev, "destroying NIC\n");
Ben Hutchings8ceee662008-04-27 12:55:59 +01001364
1365 efx_remove_interrupts(efx);
Ben Hutchingsef2b90e2009-11-29 03:42:31 +00001366 efx->type->remove(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001367}
1368
1369/**************************************************************************
1370 *
1371 * NIC startup/shutdown
1372 *
1373 *************************************************************************/
1374
1375static int efx_probe_all(struct efx_nic *efx)
1376{
Ben Hutchings8ceee662008-04-27 12:55:59 +01001377 int rc;
1378
Ben Hutchings8ceee662008-04-27 12:55:59 +01001379 rc = efx_probe_nic(efx);
1380 if (rc) {
Ben Hutchings62776d02010-06-23 11:30:07 +00001381 netif_err(efx, probe, efx->net_dev, "failed to create NIC\n");
Ben Hutchings8ceee662008-04-27 12:55:59 +01001382 goto fail1;
1383 }
1384
Ben Hutchings8ceee662008-04-27 12:55:59 +01001385 rc = efx_probe_port(efx);
1386 if (rc) {
Ben Hutchings62776d02010-06-23 11:30:07 +00001387 netif_err(efx, probe, efx->net_dev, "failed to create port\n");
Ben Hutchings8ceee662008-04-27 12:55:59 +01001388 goto fail2;
1389 }
1390
Steve Hodgsonecc910f2010-09-10 06:42:22 +00001391 efx->rxq_entries = efx->txq_entries = EFX_DEFAULT_DMAQ_SIZE;
Ben Hutchings46426102010-09-10 06:42:33 +00001392 rc = efx_probe_channels(efx);
1393 if (rc)
1394 goto fail3;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001395
Ben Hutchings64eebcf2010-09-20 08:43:07 +00001396 rc = efx_probe_filters(efx);
1397 if (rc) {
1398 netif_err(efx, probe, efx->net_dev,
1399 "failed to create filter tables\n");
1400 goto fail4;
1401 }
1402
Ben Hutchings8ceee662008-04-27 12:55:59 +01001403 return 0;
1404
Ben Hutchings64eebcf2010-09-20 08:43:07 +00001405 fail4:
1406 efx_remove_channels(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001407 fail3:
Ben Hutchings8ceee662008-04-27 12:55:59 +01001408 efx_remove_port(efx);
1409 fail2:
1410 efx_remove_nic(efx);
1411 fail1:
1412 return rc;
1413}
1414
1415/* Called after previous invocation(s) of efx_stop_all, restarts the
1416 * port, kernel transmit queue, NAPI processing and hardware interrupts,
1417 * and ensures that the port is scheduled to be reconfigured.
1418 * This function is safe to call multiple times when the NIC is in any
1419 * state. */
1420static void efx_start_all(struct efx_nic *efx)
1421{
1422 struct efx_channel *channel;
1423
1424 EFX_ASSERT_RESET_SERIALISED(efx);
1425
1426 /* Check that it is appropriate to restart the interface. All
1427 * of these flags are safe to read under just the rtnl lock */
1428 if (efx->port_enabled)
1429 return;
1430 if ((efx->state != STATE_RUNNING) && (efx->state != STATE_INIT))
1431 return;
Ben Hutchings55668612008-05-16 21:16:10 +01001432 if (efx_dev_registered(efx) && !netif_running(efx->net_dev))
Ben Hutchings8ceee662008-04-27 12:55:59 +01001433 return;
1434
1435 /* Mark the port as enabled so port reconfigurations can start, then
1436 * restart the transmit interface early so the watchdog timer stops */
1437 efx_start_port(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001438
Ben Hutchingsc04bfc62010-12-10 01:24:16 +00001439 if (efx_dev_registered(efx))
1440 netif_tx_wake_all_queues(efx->net_dev);
1441
1442 efx_for_each_channel(channel, efx)
Ben Hutchings8ceee662008-04-27 12:55:59 +01001443 efx_start_channel(channel);
1444
Ben Hutchings94dec6a2010-12-07 19:24:45 +00001445 if (efx->legacy_irq)
1446 efx->legacy_irq_enabled = true;
Ben Hutchings152b6a62009-11-29 03:43:56 +00001447 efx_nic_enable_interrupts(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001448
Ben Hutchings8880f4e2009-11-29 15:15:41 +00001449 /* Switch to event based MCDI completions after enabling interrupts.
1450 * If a reset has been scheduled, then we need to stay in polled mode.
1451 * Rather than serialising efx_mcdi_mode_event() [which sleeps] and
1452 * reset_pending [modified from an atomic context], we instead guarantee
1453 * that efx_mcdi_mode_poll() isn't reverted erroneously */
1454 efx_mcdi_mode_event(efx);
1455 if (efx->reset_pending != RESET_TYPE_NONE)
1456 efx_mcdi_mode_poll(efx);
1457
Steve Hodgson78c1f0a2009-11-29 03:43:00 +00001458 /* Start the hardware monitor if there is one. Otherwise (we're link
1459 * event driven), we have to poll the PHY because after an event queue
1460 * flush, we could have a missed a link state change */
1461 if (efx->type->monitor != NULL) {
Ben Hutchings8ceee662008-04-27 12:55:59 +01001462 queue_delayed_work(efx->workqueue, &efx->monitor_work,
1463 efx_monitor_interval);
Steve Hodgson78c1f0a2009-11-29 03:43:00 +00001464 } else {
1465 mutex_lock(&efx->mac_lock);
1466 if (efx->phy_op->poll(efx))
1467 efx_link_status_changed(efx);
1468 mutex_unlock(&efx->mac_lock);
1469 }
Ben Hutchings55edc6e2009-11-25 16:11:35 +00001470
Ben Hutchingsef2b90e2009-11-29 03:42:31 +00001471 efx->type->start_stats(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001472}
1473
1474/* Flush all delayed work. Should only be called when no more delayed work
1475 * will be scheduled. This doesn't flush pending online resets (efx_reset),
1476 * since we're holding the rtnl_lock at this point. */
1477static void efx_flush_all(struct efx_nic *efx)
1478{
Ben Hutchings8ceee662008-04-27 12:55:59 +01001479 /* Make sure the hardware monitor is stopped */
1480 cancel_delayed_work_sync(&efx->monitor_work);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001481 /* Stop scheduled port reconfigurations */
Ben Hutchings766ca0f2008-12-12 21:59:24 -08001482 cancel_work_sync(&efx->mac_work);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001483}
1484
1485/* Quiesce hardware and software without bringing the link down.
1486 * Safe to call multiple times, when the nic and interface is in any
1487 * state. The caller is guaranteed to subsequently be in a position
1488 * to modify any hardware and software state they see fit without
1489 * taking locks. */
1490static void efx_stop_all(struct efx_nic *efx)
1491{
1492 struct efx_channel *channel;
1493
1494 EFX_ASSERT_RESET_SERIALISED(efx);
1495
1496 /* port_enabled can be read safely under the rtnl lock */
1497 if (!efx->port_enabled)
1498 return;
1499
Ben Hutchingsef2b90e2009-11-29 03:42:31 +00001500 efx->type->stop_stats(efx);
Ben Hutchings55edc6e2009-11-25 16:11:35 +00001501
Ben Hutchings8880f4e2009-11-29 15:15:41 +00001502 /* Switch to MCDI polling on Siena before disabling interrupts */
1503 efx_mcdi_mode_poll(efx);
1504
Ben Hutchings8ceee662008-04-27 12:55:59 +01001505 /* Disable interrupts and wait for ISR to complete */
Ben Hutchings152b6a62009-11-29 03:43:56 +00001506 efx_nic_disable_interrupts(efx);
Ben Hutchings94dec6a2010-12-07 19:24:45 +00001507 if (efx->legacy_irq) {
Ben Hutchings8ceee662008-04-27 12:55:59 +01001508 synchronize_irq(efx->legacy_irq);
Ben Hutchings94dec6a2010-12-07 19:24:45 +00001509 efx->legacy_irq_enabled = false;
1510 }
Ben Hutchings64ee3122008-09-01 12:47:38 +01001511 efx_for_each_channel(channel, efx) {
Ben Hutchings8ceee662008-04-27 12:55:59 +01001512 if (channel->irq)
1513 synchronize_irq(channel->irq);
Ben Hutchingsb3475642008-05-16 21:15:49 +01001514 }
Ben Hutchings8ceee662008-04-27 12:55:59 +01001515
1516 /* Stop all NAPI processing and synchronous rx refills */
1517 efx_for_each_channel(channel, efx)
1518 efx_stop_channel(channel);
1519
1520 /* Stop all asynchronous port reconfigurations. Since all
1521 * event processing has already been stopped, there is no
1522 * window to loose phy events */
1523 efx_stop_port(efx);
1524
Steve Hodgsonfdaa9ae2009-11-28 05:34:05 +00001525 /* Flush efx_mac_work(), refill_workqueue, monitor_work */
Ben Hutchings8ceee662008-04-27 12:55:59 +01001526 efx_flush_all(efx);
1527
Ben Hutchings8ceee662008-04-27 12:55:59 +01001528 /* Stop the kernel transmit interface late, so the watchdog
1529 * timer isn't ticking over the flush */
Ben Hutchings55668612008-05-16 21:16:10 +01001530 if (efx_dev_registered(efx)) {
Ben Hutchingsc04bfc62010-12-10 01:24:16 +00001531 netif_tx_stop_all_queues(efx->net_dev);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001532 netif_tx_lock_bh(efx->net_dev);
1533 netif_tx_unlock_bh(efx->net_dev);
1534 }
1535}
1536
1537static void efx_remove_all(struct efx_nic *efx)
1538{
Ben Hutchings64eebcf2010-09-20 08:43:07 +00001539 efx_remove_filters(efx);
Ben Hutchings46426102010-09-10 06:42:33 +00001540 efx_remove_channels(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001541 efx_remove_port(efx);
1542 efx_remove_nic(efx);
1543}
1544
Ben Hutchings8ceee662008-04-27 12:55:59 +01001545/**************************************************************************
1546 *
1547 * Interrupt moderation
1548 *
1549 **************************************************************************/
1550
Ben Hutchings0d86ebd2009-10-23 08:32:13 +00001551static unsigned irq_mod_ticks(int usecs, int resolution)
1552{
1553 if (usecs <= 0)
1554 return 0; /* cannot receive interrupts ahead of time :-) */
1555 if (usecs < resolution)
1556 return 1; /* never round down to 0 */
1557 return usecs / resolution;
1558}
1559
Ben Hutchings8ceee662008-04-27 12:55:59 +01001560/* Set interrupt moderation parameters */
Ben Hutchings6fb70fd2009-03-20 13:30:37 +00001561void efx_init_irq_moderation(struct efx_nic *efx, int tx_usecs, int rx_usecs,
1562 bool rx_adaptive)
Ben Hutchings8ceee662008-04-27 12:55:59 +01001563{
Ben Hutchingsf7d12cd2010-09-10 06:41:47 +00001564 struct efx_channel *channel;
Ben Hutchings152b6a62009-11-29 03:43:56 +00001565 unsigned tx_ticks = irq_mod_ticks(tx_usecs, EFX_IRQ_MOD_RESOLUTION);
1566 unsigned rx_ticks = irq_mod_ticks(rx_usecs, EFX_IRQ_MOD_RESOLUTION);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001567
1568 EFX_ASSERT_RESET_SERIALISED(efx);
1569
Ben Hutchings6fb70fd2009-03-20 13:30:37 +00001570 efx->irq_rx_adaptive = rx_adaptive;
Ben Hutchings0d86ebd2009-10-23 08:32:13 +00001571 efx->irq_rx_moderation = rx_ticks;
Ben Hutchingsf7d12cd2010-09-10 06:41:47 +00001572 efx_for_each_channel(channel, efx) {
Ben Hutchings525da902011-02-07 23:04:38 +00001573 if (efx_channel_has_rx_queue(channel))
Ben Hutchingsf7d12cd2010-09-10 06:41:47 +00001574 channel->irq_moderation = rx_ticks;
Ben Hutchings525da902011-02-07 23:04:38 +00001575 else if (efx_channel_has_tx_queues(channel))
Ben Hutchingsf7d12cd2010-09-10 06:41:47 +00001576 channel->irq_moderation = tx_ticks;
1577 }
Ben Hutchings8ceee662008-04-27 12:55:59 +01001578}
1579
1580/**************************************************************************
1581 *
1582 * Hardware monitor
1583 *
1584 **************************************************************************/
1585
Ben Hutchingse254c272010-09-20 08:44:10 +00001586/* Run periodically off the general workqueue */
Ben Hutchings8ceee662008-04-27 12:55:59 +01001587static void efx_monitor(struct work_struct *data)
1588{
1589 struct efx_nic *efx = container_of(data, struct efx_nic,
1590 monitor_work.work);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001591
Ben Hutchings62776d02010-06-23 11:30:07 +00001592 netif_vdbg(efx, timer, efx->net_dev,
1593 "hardware monitor executing on CPU %d\n",
1594 raw_smp_processor_id());
Ben Hutchingsef2b90e2009-11-29 03:42:31 +00001595 BUG_ON(efx->type->monitor == NULL);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001596
Ben Hutchings8ceee662008-04-27 12:55:59 +01001597 /* If the mac_lock is already held then it is likely a port
1598 * reconfiguration is already in place, which will likely do
Ben Hutchingse254c272010-09-20 08:44:10 +00001599 * most of the work of monitor() anyway. */
1600 if (mutex_trylock(&efx->mac_lock)) {
1601 if (efx->port_enabled)
1602 efx->type->monitor(efx);
1603 mutex_unlock(&efx->mac_lock);
1604 }
Ben Hutchings8ceee662008-04-27 12:55:59 +01001605
Ben Hutchings8ceee662008-04-27 12:55:59 +01001606 queue_delayed_work(efx->workqueue, &efx->monitor_work,
1607 efx_monitor_interval);
1608}
1609
1610/**************************************************************************
1611 *
1612 * ioctls
1613 *
1614 *************************************************************************/
1615
1616/* Net device ioctl
1617 * Context: process, rtnl_lock() held.
1618 */
1619static int efx_ioctl(struct net_device *net_dev, struct ifreq *ifr, int cmd)
1620{
Ben Hutchings767e4682008-09-01 12:43:14 +01001621 struct efx_nic *efx = netdev_priv(net_dev);
Ben Hutchings68e7f452009-04-29 08:05:08 +00001622 struct mii_ioctl_data *data = if_mii(ifr);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001623
1624 EFX_ASSERT_RESET_SERIALISED(efx);
1625
Ben Hutchings68e7f452009-04-29 08:05:08 +00001626 /* Convert phy_id from older PRTAD/DEVAD format */
1627 if ((cmd == SIOCGMIIREG || cmd == SIOCSMIIREG) &&
1628 (data->phy_id & 0xfc00) == 0x0400)
1629 data->phy_id ^= MDIO_PHY_ID_C45 | 0x0400;
1630
1631 return mdio_mii_ioctl(&efx->mdio, data, cmd);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001632}
1633
1634/**************************************************************************
1635 *
1636 * NAPI interface
1637 *
1638 **************************************************************************/
1639
Ben Hutchingse8f14992010-12-07 19:47:34 +00001640static void efx_init_napi(struct efx_nic *efx)
Ben Hutchings8ceee662008-04-27 12:55:59 +01001641{
1642 struct efx_channel *channel;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001643
1644 efx_for_each_channel(channel, efx) {
1645 channel->napi_dev = efx->net_dev;
Ben Hutchings718cff12009-04-14 19:47:46 -07001646 netif_napi_add(channel->napi_dev, &channel->napi_str,
1647 efx_poll, napi_weight);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001648 }
Ben Hutchingse8f14992010-12-07 19:47:34 +00001649}
1650
1651static void efx_fini_napi_channel(struct efx_channel *channel)
1652{
1653 if (channel->napi_dev)
1654 netif_napi_del(&channel->napi_str);
1655 channel->napi_dev = NULL;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001656}
1657
1658static void efx_fini_napi(struct efx_nic *efx)
1659{
1660 struct efx_channel *channel;
1661
Ben Hutchingse8f14992010-12-07 19:47:34 +00001662 efx_for_each_channel(channel, efx)
1663 efx_fini_napi_channel(channel);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001664}
1665
1666/**************************************************************************
1667 *
1668 * Kernel netpoll interface
1669 *
1670 *************************************************************************/
1671
1672#ifdef CONFIG_NET_POLL_CONTROLLER
1673
1674/* Although in the common case interrupts will be disabled, this is not
1675 * guaranteed. However, all our work happens inside the NAPI callback,
1676 * so no locking is required.
1677 */
1678static void efx_netpoll(struct net_device *net_dev)
1679{
Ben Hutchings767e4682008-09-01 12:43:14 +01001680 struct efx_nic *efx = netdev_priv(net_dev);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001681 struct efx_channel *channel;
1682
Ben Hutchings64ee3122008-09-01 12:47:38 +01001683 efx_for_each_channel(channel, efx)
Ben Hutchings8ceee662008-04-27 12:55:59 +01001684 efx_schedule_channel(channel);
1685}
1686
1687#endif
1688
1689/**************************************************************************
1690 *
1691 * Kernel net device interface
1692 *
1693 *************************************************************************/
1694
1695/* Context: process, rtnl_lock() held. */
1696static int efx_net_open(struct net_device *net_dev)
1697{
Ben Hutchings767e4682008-09-01 12:43:14 +01001698 struct efx_nic *efx = netdev_priv(net_dev);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001699 EFX_ASSERT_RESET_SERIALISED(efx);
1700
Ben Hutchings62776d02010-06-23 11:30:07 +00001701 netif_dbg(efx, ifup, efx->net_dev, "opening device on CPU %d\n",
1702 raw_smp_processor_id());
Ben Hutchings8ceee662008-04-27 12:55:59 +01001703
Ben Hutchingsf4bd9542008-12-26 13:48:51 -08001704 if (efx->state == STATE_DISABLED)
1705 return -EIO;
Ben Hutchingsf8b87c12008-09-01 12:48:17 +01001706 if (efx->phy_mode & PHY_MODE_SPECIAL)
1707 return -EBUSY;
Ben Hutchings8880f4e2009-11-29 15:15:41 +00001708 if (efx_mcdi_poll_reboot(efx) && efx_reset(efx, RESET_TYPE_ALL))
1709 return -EIO;
Ben Hutchingsf8b87c12008-09-01 12:48:17 +01001710
Steve Hodgson78c1f0a2009-11-29 03:43:00 +00001711 /* Notify the kernel of the link state polled during driver load,
1712 * before the monitor starts running */
1713 efx_link_status_changed(efx);
1714
Ben Hutchings8ceee662008-04-27 12:55:59 +01001715 efx_start_all(efx);
1716 return 0;
1717}
1718
1719/* Context: process, rtnl_lock() held.
1720 * Note that the kernel will ignore our return code; this method
1721 * should really be a void.
1722 */
1723static int efx_net_stop(struct net_device *net_dev)
1724{
Ben Hutchings767e4682008-09-01 12:43:14 +01001725 struct efx_nic *efx = netdev_priv(net_dev);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001726
Ben Hutchings62776d02010-06-23 11:30:07 +00001727 netif_dbg(efx, ifdown, efx->net_dev, "closing on CPU %d\n",
1728 raw_smp_processor_id());
Ben Hutchings8ceee662008-04-27 12:55:59 +01001729
Ben Hutchingsf4bd9542008-12-26 13:48:51 -08001730 if (efx->state != STATE_DISABLED) {
1731 /* Stop the device and flush all the channels */
1732 efx_stop_all(efx);
1733 efx_fini_channels(efx);
1734 efx_init_channels(efx);
1735 }
Ben Hutchings8ceee662008-04-27 12:55:59 +01001736
1737 return 0;
1738}
1739
Ben Hutchings5b9e2072008-05-16 21:18:14 +01001740/* Context: process, dev_base_lock or RTNL held, non-blocking. */
Eric Dumazet28172732010-07-07 14:58:56 -07001741static struct rtnl_link_stats64 *efx_net_stats(struct net_device *net_dev, struct rtnl_link_stats64 *stats)
Ben Hutchings8ceee662008-04-27 12:55:59 +01001742{
Ben Hutchings767e4682008-09-01 12:43:14 +01001743 struct efx_nic *efx = netdev_priv(net_dev);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001744 struct efx_mac_stats *mac_stats = &efx->mac_stats;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001745
Ben Hutchings55edc6e2009-11-25 16:11:35 +00001746 spin_lock_bh(&efx->stats_lock);
Ben Hutchingsef2b90e2009-11-29 03:42:31 +00001747 efx->type->update_stats(efx);
Ben Hutchings55edc6e2009-11-25 16:11:35 +00001748 spin_unlock_bh(&efx->stats_lock);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001749
1750 stats->rx_packets = mac_stats->rx_packets;
1751 stats->tx_packets = mac_stats->tx_packets;
1752 stats->rx_bytes = mac_stats->rx_bytes;
1753 stats->tx_bytes = mac_stats->tx_bytes;
Ben Hutchings80485d32010-09-10 06:41:06 +00001754 stats->rx_dropped = efx->n_rx_nodesc_drop_cnt;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001755 stats->multicast = mac_stats->rx_multicast;
1756 stats->collisions = mac_stats->tx_collision;
1757 stats->rx_length_errors = (mac_stats->rx_gtjumbo +
1758 mac_stats->rx_length_error);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001759 stats->rx_crc_errors = mac_stats->rx_bad;
1760 stats->rx_frame_errors = mac_stats->rx_align_error;
1761 stats->rx_fifo_errors = mac_stats->rx_overflow;
1762 stats->rx_missed_errors = mac_stats->rx_missed;
1763 stats->tx_window_errors = mac_stats->tx_late_collision;
1764
1765 stats->rx_errors = (stats->rx_length_errors +
Ben Hutchings8ceee662008-04-27 12:55:59 +01001766 stats->rx_crc_errors +
1767 stats->rx_frame_errors +
Ben Hutchings8ceee662008-04-27 12:55:59 +01001768 mac_stats->rx_symbol_error);
1769 stats->tx_errors = (stats->tx_window_errors +
1770 mac_stats->tx_bad);
1771
1772 return stats;
1773}
1774
1775/* Context: netif_tx_lock held, BHs disabled. */
1776static void efx_watchdog(struct net_device *net_dev)
1777{
Ben Hutchings767e4682008-09-01 12:43:14 +01001778 struct efx_nic *efx = netdev_priv(net_dev);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001779
Ben Hutchings62776d02010-06-23 11:30:07 +00001780 netif_err(efx, tx_err, efx->net_dev,
1781 "TX stuck with port_enabled=%d: resetting channels\n",
1782 efx->port_enabled);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001783
Ben Hutchings739bb23d2008-11-04 20:35:36 +00001784 efx_schedule_reset(efx, RESET_TYPE_TX_WATCHDOG);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001785}
1786
1787
1788/* Context: process, rtnl_lock() held. */
1789static int efx_change_mtu(struct net_device *net_dev, int new_mtu)
1790{
Ben Hutchings767e4682008-09-01 12:43:14 +01001791 struct efx_nic *efx = netdev_priv(net_dev);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001792 int rc = 0;
1793
1794 EFX_ASSERT_RESET_SERIALISED(efx);
1795
1796 if (new_mtu > EFX_MAX_MTU)
1797 return -EINVAL;
1798
1799 efx_stop_all(efx);
1800
Ben Hutchings62776d02010-06-23 11:30:07 +00001801 netif_dbg(efx, drv, efx->net_dev, "changing MTU to %d\n", new_mtu);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001802
1803 efx_fini_channels(efx);
Ben Hutchingsd3245b22009-11-29 03:42:41 +00001804
1805 mutex_lock(&efx->mac_lock);
1806 /* Reconfigure the MAC before enabling the dma queues so that
1807 * the RX buffers don't overflow */
Ben Hutchings8ceee662008-04-27 12:55:59 +01001808 net_dev->mtu = new_mtu;
Ben Hutchingsd3245b22009-11-29 03:42:41 +00001809 efx->mac_op->reconfigure(efx);
1810 mutex_unlock(&efx->mac_lock);
1811
Ben Hutchingsbc3c90a2008-09-01 12:48:46 +01001812 efx_init_channels(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001813
1814 efx_start_all(efx);
1815 return rc;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001816}
1817
1818static int efx_set_mac_address(struct net_device *net_dev, void *data)
1819{
Ben Hutchings767e4682008-09-01 12:43:14 +01001820 struct efx_nic *efx = netdev_priv(net_dev);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001821 struct sockaddr *addr = data;
1822 char *new_addr = addr->sa_data;
1823
1824 EFX_ASSERT_RESET_SERIALISED(efx);
1825
1826 if (!is_valid_ether_addr(new_addr)) {
Ben Hutchings62776d02010-06-23 11:30:07 +00001827 netif_err(efx, drv, efx->net_dev,
1828 "invalid ethernet MAC address requested: %pM\n",
1829 new_addr);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001830 return -EINVAL;
1831 }
1832
1833 memcpy(net_dev->dev_addr, new_addr, net_dev->addr_len);
1834
1835 /* Reconfigure the MAC */
Ben Hutchingsd3245b22009-11-29 03:42:41 +00001836 mutex_lock(&efx->mac_lock);
1837 efx->mac_op->reconfigure(efx);
1838 mutex_unlock(&efx->mac_lock);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001839
1840 return 0;
1841}
1842
Ben Hutchingsa816f752008-09-01 12:49:12 +01001843/* Context: netif_addr_lock held, BHs disabled. */
Ben Hutchings8ceee662008-04-27 12:55:59 +01001844static void efx_set_multicast_list(struct net_device *net_dev)
1845{
Ben Hutchings767e4682008-09-01 12:43:14 +01001846 struct efx_nic *efx = netdev_priv(net_dev);
Jiri Pirko22bedad32010-04-01 21:22:57 +00001847 struct netdev_hw_addr *ha;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001848 union efx_multicast_hash *mc_hash = &efx->multicast_hash;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001849 u32 crc;
1850 int bit;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001851
Ben Hutchings8be4f3e2009-11-25 16:12:16 +00001852 efx->promiscuous = !!(net_dev->flags & IFF_PROMISC);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001853
1854 /* Build multicast hash table */
Ben Hutchings8be4f3e2009-11-25 16:12:16 +00001855 if (efx->promiscuous || (net_dev->flags & IFF_ALLMULTI)) {
Ben Hutchings8ceee662008-04-27 12:55:59 +01001856 memset(mc_hash, 0xff, sizeof(*mc_hash));
1857 } else {
1858 memset(mc_hash, 0x00, sizeof(*mc_hash));
Jiri Pirko22bedad32010-04-01 21:22:57 +00001859 netdev_for_each_mc_addr(ha, net_dev) {
1860 crc = ether_crc_le(ETH_ALEN, ha->addr);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001861 bit = crc & (EFX_MCAST_HASH_ENTRIES - 1);
1862 set_bit_le(bit, mc_hash->byte);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001863 }
Ben Hutchings8be4f3e2009-11-25 16:12:16 +00001864
1865 /* Broadcast packets go through the multicast hash filter.
1866 * ether_crc_le() of the broadcast address is 0xbe2612ff
1867 * so we always add bit 0xff to the mask.
1868 */
1869 set_bit_le(0xff, mc_hash->byte);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001870 }
1871
Ben Hutchings8be4f3e2009-11-25 16:12:16 +00001872 if (efx->port_enabled)
1873 queue_work(efx->workqueue, &efx->mac_work);
1874 /* Otherwise efx_start_port() will do this */
Ben Hutchings8ceee662008-04-27 12:55:59 +01001875}
1876
Stephen Hemmingerc3ecb9f2008-11-21 17:32:54 -08001877static const struct net_device_ops efx_netdev_ops = {
1878 .ndo_open = efx_net_open,
1879 .ndo_stop = efx_net_stop,
Ben Hutchings44727022010-06-08 07:21:12 +00001880 .ndo_get_stats64 = efx_net_stats,
Stephen Hemmingerc3ecb9f2008-11-21 17:32:54 -08001881 .ndo_tx_timeout = efx_watchdog,
1882 .ndo_start_xmit = efx_hard_start_xmit,
1883 .ndo_validate_addr = eth_validate_addr,
1884 .ndo_do_ioctl = efx_ioctl,
1885 .ndo_change_mtu = efx_change_mtu,
1886 .ndo_set_mac_address = efx_set_mac_address,
1887 .ndo_set_multicast_list = efx_set_multicast_list,
1888#ifdef CONFIG_NET_POLL_CONTROLLER
1889 .ndo_poll_controller = efx_netpoll,
1890#endif
Ben Hutchings94b274b2011-01-10 21:18:20 +00001891 .ndo_setup_tc = efx_setup_tc,
Ben Hutchings64d8ad62011-01-05 00:50:41 +00001892#ifdef CONFIG_RFS_ACCEL
1893 .ndo_rx_flow_steer = efx_filter_rfs,
1894#endif
Stephen Hemmingerc3ecb9f2008-11-21 17:32:54 -08001895};
1896
Ben Hutchings7dde5962008-12-12 22:09:38 -08001897static void efx_update_name(struct efx_nic *efx)
1898{
1899 strcpy(efx->name, efx->net_dev->name);
1900 efx_mtd_rename(efx);
1901 efx_set_channel_names(efx);
1902}
1903
Ben Hutchings8ceee662008-04-27 12:55:59 +01001904static int efx_netdev_event(struct notifier_block *this,
1905 unsigned long event, void *ptr)
1906{
Ben Hutchingsd3208b52008-05-16 21:20:00 +01001907 struct net_device *net_dev = ptr;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001908
Ben Hutchings7dde5962008-12-12 22:09:38 -08001909 if (net_dev->netdev_ops == &efx_netdev_ops &&
1910 event == NETDEV_CHANGENAME)
1911 efx_update_name(netdev_priv(net_dev));
Ben Hutchings8ceee662008-04-27 12:55:59 +01001912
1913 return NOTIFY_DONE;
1914}
1915
1916static struct notifier_block efx_netdev_notifier = {
1917 .notifier_call = efx_netdev_event,
1918};
1919
Ben Hutchings06d5e192008-12-12 21:47:23 -08001920static ssize_t
1921show_phy_type(struct device *dev, struct device_attribute *attr, char *buf)
1922{
1923 struct efx_nic *efx = pci_get_drvdata(to_pci_dev(dev));
1924 return sprintf(buf, "%d\n", efx->phy_type);
1925}
1926static DEVICE_ATTR(phy_type, 0644, show_phy_type, NULL);
1927
Ben Hutchings8ceee662008-04-27 12:55:59 +01001928static int efx_register_netdev(struct efx_nic *efx)
1929{
1930 struct net_device *net_dev = efx->net_dev;
Ben Hutchingsc04bfc62010-12-10 01:24:16 +00001931 struct efx_channel *channel;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001932 int rc;
1933
1934 net_dev->watchdog_timeo = 5 * HZ;
1935 net_dev->irq = efx->pci_dev->irq;
Stephen Hemmingerc3ecb9f2008-11-21 17:32:54 -08001936 net_dev->netdev_ops = &efx_netdev_ops;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001937 SET_ETHTOOL_OPS(net_dev, &efx_ethtool_ops);
1938
Ben Hutchings8ceee662008-04-27 12:55:59 +01001939 /* Clear MAC statistics */
Ben Hutchings177dfcd2008-12-12 21:50:08 -08001940 efx->mac_op->update_stats(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001941 memset(&efx->mac_stats, 0, sizeof(efx->mac_stats));
1942
Ben Hutchings7dde5962008-12-12 22:09:38 -08001943 rtnl_lock();
Ben Hutchingsaed06282009-08-26 08:16:27 +00001944
1945 rc = dev_alloc_name(net_dev, net_dev->name);
1946 if (rc < 0)
1947 goto fail_locked;
Ben Hutchings7dde5962008-12-12 22:09:38 -08001948 efx_update_name(efx);
Ben Hutchingsaed06282009-08-26 08:16:27 +00001949
1950 rc = register_netdevice(net_dev);
1951 if (rc)
1952 goto fail_locked;
1953
Ben Hutchingsc04bfc62010-12-10 01:24:16 +00001954 efx_for_each_channel(channel, efx) {
1955 struct efx_tx_queue *tx_queue;
Ben Hutchings60031fc2011-01-12 18:39:40 +00001956 efx_for_each_channel_tx_queue(tx_queue, channel)
1957 efx_init_tx_queue_core_txq(tx_queue);
Ben Hutchingsc04bfc62010-12-10 01:24:16 +00001958 }
1959
Ben Hutchingsaed06282009-08-26 08:16:27 +00001960 /* Always start with carrier off; PHY events will detect the link */
1961 netif_carrier_off(efx->net_dev);
1962
Ben Hutchings7dde5962008-12-12 22:09:38 -08001963 rtnl_unlock();
Ben Hutchings8ceee662008-04-27 12:55:59 +01001964
Ben Hutchings06d5e192008-12-12 21:47:23 -08001965 rc = device_create_file(&efx->pci_dev->dev, &dev_attr_phy_type);
1966 if (rc) {
Ben Hutchings62776d02010-06-23 11:30:07 +00001967 netif_err(efx, drv, efx->net_dev,
1968 "failed to init net dev attributes\n");
Ben Hutchings06d5e192008-12-12 21:47:23 -08001969 goto fail_registered;
1970 }
1971
Ben Hutchings8ceee662008-04-27 12:55:59 +01001972 return 0;
Ben Hutchings06d5e192008-12-12 21:47:23 -08001973
Ben Hutchingsaed06282009-08-26 08:16:27 +00001974fail_locked:
1975 rtnl_unlock();
Ben Hutchings62776d02010-06-23 11:30:07 +00001976 netif_err(efx, drv, efx->net_dev, "could not register net dev\n");
Ben Hutchingsaed06282009-08-26 08:16:27 +00001977 return rc;
1978
Ben Hutchings06d5e192008-12-12 21:47:23 -08001979fail_registered:
1980 unregister_netdev(net_dev);
1981 return rc;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001982}
1983
1984static void efx_unregister_netdev(struct efx_nic *efx)
1985{
Ben Hutchingsf7d12cd2010-09-10 06:41:47 +00001986 struct efx_channel *channel;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001987 struct efx_tx_queue *tx_queue;
1988
1989 if (!efx->net_dev)
1990 return;
1991
Ben Hutchings767e4682008-09-01 12:43:14 +01001992 BUG_ON(netdev_priv(efx->net_dev) != efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001993
1994 /* Free up any skbs still remaining. This has to happen before
1995 * we try to unregister the netdev as running their destructors
1996 * may be needed to get the device ref. count to 0. */
Ben Hutchingsf7d12cd2010-09-10 06:41:47 +00001997 efx_for_each_channel(channel, efx) {
1998 efx_for_each_channel_tx_queue(tx_queue, channel)
1999 efx_release_tx_buffers(tx_queue);
2000 }
Ben Hutchings8ceee662008-04-27 12:55:59 +01002001
Ben Hutchings55668612008-05-16 21:16:10 +01002002 if (efx_dev_registered(efx)) {
Ben Hutchings8ceee662008-04-27 12:55:59 +01002003 strlcpy(efx->name, pci_name(efx->pci_dev), sizeof(efx->name));
Ben Hutchings06d5e192008-12-12 21:47:23 -08002004 device_remove_file(&efx->pci_dev->dev, &dev_attr_phy_type);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002005 unregister_netdev(efx->net_dev);
2006 }
2007}
2008
2009/**************************************************************************
2010 *
2011 * Device reset and suspend
2012 *
2013 **************************************************************************/
2014
Ben Hutchings2467ca42008-09-01 12:48:50 +01002015/* Tears down the entire software state and most of the hardware state
2016 * before reset. */
Ben Hutchingsd3245b22009-11-29 03:42:41 +00002017void efx_reset_down(struct efx_nic *efx, enum reset_type method)
Ben Hutchings8ceee662008-04-27 12:55:59 +01002018{
Ben Hutchings8ceee662008-04-27 12:55:59 +01002019 EFX_ASSERT_RESET_SERIALISED(efx);
2020
Ben Hutchings2467ca42008-09-01 12:48:50 +01002021 efx_stop_all(efx);
2022 mutex_lock(&efx->mac_lock);
2023
Ben Hutchings8ceee662008-04-27 12:55:59 +01002024 efx_fini_channels(efx);
Steve Hodgson4b988282009-01-29 17:50:51 +00002025 if (efx->port_initialized && method != RESET_TYPE_INVISIBLE)
2026 efx->phy_op->fini(efx);
Ben Hutchingsef2b90e2009-11-29 03:42:31 +00002027 efx->type->fini(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002028}
2029
Ben Hutchings2467ca42008-09-01 12:48:50 +01002030/* This function will always ensure that the locks acquired in
2031 * efx_reset_down() are released. A failure return code indicates
2032 * that we were unable to reinitialise the hardware, and the
2033 * driver should be disabled. If ok is false, then the rx and tx
2034 * engines are not restarted, pending a RESET_DISABLE. */
Ben Hutchingsd3245b22009-11-29 03:42:41 +00002035int efx_reset_up(struct efx_nic *efx, enum reset_type method, bool ok)
Ben Hutchings8ceee662008-04-27 12:55:59 +01002036{
2037 int rc;
2038
Ben Hutchings2467ca42008-09-01 12:48:50 +01002039 EFX_ASSERT_RESET_SERIALISED(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002040
Ben Hutchingsef2b90e2009-11-29 03:42:31 +00002041 rc = efx->type->init(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002042 if (rc) {
Ben Hutchings62776d02010-06-23 11:30:07 +00002043 netif_err(efx, drv, efx->net_dev, "failed to initialise NIC\n");
Ben Hutchingseb9f6742009-11-29 03:43:15 +00002044 goto fail;
Ben Hutchings8ceee662008-04-27 12:55:59 +01002045 }
2046
Ben Hutchingseb9f6742009-11-29 03:43:15 +00002047 if (!ok)
2048 goto fail;
2049
Steve Hodgson4b988282009-01-29 17:50:51 +00002050 if (efx->port_initialized && method != RESET_TYPE_INVISIBLE) {
Ben Hutchingseb9f6742009-11-29 03:43:15 +00002051 rc = efx->phy_op->init(efx);
2052 if (rc)
2053 goto fail;
2054 if (efx->phy_op->reconfigure(efx))
Ben Hutchings62776d02010-06-23 11:30:07 +00002055 netif_err(efx, drv, efx->net_dev,
2056 "could not restore PHY settings\n");
Steve Hodgson4b988282009-01-29 17:50:51 +00002057 }
2058
Ben Hutchingseb9f6742009-11-29 03:43:15 +00002059 efx->mac_op->reconfigure(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002060
Ben Hutchingseb9f6742009-11-29 03:43:15 +00002061 efx_init_channels(efx);
Ben Hutchings64eebcf2010-09-20 08:43:07 +00002062 efx_restore_filters(efx);
Ben Hutchings2467ca42008-09-01 12:48:50 +01002063
2064 mutex_unlock(&efx->mac_lock);
2065
Ben Hutchingseb9f6742009-11-29 03:43:15 +00002066 efx_start_all(efx);
2067
2068 return 0;
2069
2070fail:
2071 efx->port_initialized = false;
2072
Ben Hutchingseb9f6742009-11-29 03:43:15 +00002073 mutex_unlock(&efx->mac_lock);
2074
Ben Hutchings8ceee662008-04-27 12:55:59 +01002075 return rc;
2076}
2077
Ben Hutchingseb9f6742009-11-29 03:43:15 +00002078/* Reset the NIC using the specified method. Note that the reset may
2079 * fail, in which case the card will be left in an unusable state.
Ben Hutchings8ceee662008-04-27 12:55:59 +01002080 *
Ben Hutchingseb9f6742009-11-29 03:43:15 +00002081 * Caller must hold the rtnl_lock.
Ben Hutchings8ceee662008-04-27 12:55:59 +01002082 */
Ben Hutchingseb9f6742009-11-29 03:43:15 +00002083int efx_reset(struct efx_nic *efx, enum reset_type method)
Ben Hutchings8ceee662008-04-27 12:55:59 +01002084{
Ben Hutchingseb9f6742009-11-29 03:43:15 +00002085 int rc, rc2;
2086 bool disabled;
Ben Hutchings8ceee662008-04-27 12:55:59 +01002087
Ben Hutchings62776d02010-06-23 11:30:07 +00002088 netif_info(efx, drv, efx->net_dev, "resetting (%s)\n",
2089 RESET_TYPE(method));
Ben Hutchings8ceee662008-04-27 12:55:59 +01002090
Ben Hutchingsd3245b22009-11-29 03:42:41 +00002091 efx_reset_down(efx, method);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002092
Ben Hutchingsef2b90e2009-11-29 03:42:31 +00002093 rc = efx->type->reset(efx, method);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002094 if (rc) {
Ben Hutchings62776d02010-06-23 11:30:07 +00002095 netif_err(efx, drv, efx->net_dev, "failed to reset hardware\n");
Ben Hutchingseb9f6742009-11-29 03:43:15 +00002096 goto out;
Ben Hutchings8ceee662008-04-27 12:55:59 +01002097 }
2098
2099 /* Allow resets to be rescheduled. */
2100 efx->reset_pending = RESET_TYPE_NONE;
2101
2102 /* Reinitialise bus-mastering, which may have been turned off before
2103 * the reset was scheduled. This is still appropriate, even in the
2104 * RESET_TYPE_DISABLE since this driver generally assumes the hardware
2105 * can respond to requests. */
2106 pci_set_master(efx->pci_dev);
2107
Ben Hutchingseb9f6742009-11-29 03:43:15 +00002108out:
Ben Hutchings8ceee662008-04-27 12:55:59 +01002109 /* Leave device stopped if necessary */
Ben Hutchingseb9f6742009-11-29 03:43:15 +00002110 disabled = rc || method == RESET_TYPE_DISABLE;
2111 rc2 = efx_reset_up(efx, method, !disabled);
2112 if (rc2) {
2113 disabled = true;
2114 if (!rc)
2115 rc = rc2;
Ben Hutchings8ceee662008-04-27 12:55:59 +01002116 }
2117
Ben Hutchingseb9f6742009-11-29 03:43:15 +00002118 if (disabled) {
Ben Hutchingsf49a4582010-04-28 09:01:33 +00002119 dev_close(efx->net_dev);
Ben Hutchings62776d02010-06-23 11:30:07 +00002120 netif_err(efx, drv, efx->net_dev, "has been disabled\n");
Ben Hutchingsf4bd9542008-12-26 13:48:51 -08002121 efx->state = STATE_DISABLED;
Ben Hutchingsf4bd9542008-12-26 13:48:51 -08002122 } else {
Ben Hutchings62776d02010-06-23 11:30:07 +00002123 netif_dbg(efx, drv, efx->net_dev, "reset complete\n");
Ben Hutchingsf4bd9542008-12-26 13:48:51 -08002124 }
Ben Hutchings8ceee662008-04-27 12:55:59 +01002125 return rc;
2126}
2127
2128/* The worker thread exists so that code that cannot sleep can
2129 * schedule a reset for later.
2130 */
2131static void efx_reset_work(struct work_struct *data)
2132{
Ben Hutchingseb9f6742009-11-29 03:43:15 +00002133 struct efx_nic *efx = container_of(data, struct efx_nic, reset_work);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002134
Steve Hodgson319ba642010-06-01 11:17:24 +00002135 if (efx->reset_pending == RESET_TYPE_NONE)
2136 return;
2137
Ben Hutchingseb9f6742009-11-29 03:43:15 +00002138 /* If we're not RUNNING then don't reset. Leave the reset_pending
2139 * flag set so that efx_pci_probe_main will be retried */
2140 if (efx->state != STATE_RUNNING) {
Ben Hutchings62776d02010-06-23 11:30:07 +00002141 netif_info(efx, drv, efx->net_dev,
2142 "scheduled reset quenched. NIC not RUNNING\n");
Ben Hutchingseb9f6742009-11-29 03:43:15 +00002143 return;
2144 }
2145
2146 rtnl_lock();
Ben Hutchingsf49a4582010-04-28 09:01:33 +00002147 (void)efx_reset(efx, efx->reset_pending);
Ben Hutchingseb9f6742009-11-29 03:43:15 +00002148 rtnl_unlock();
Ben Hutchings8ceee662008-04-27 12:55:59 +01002149}
2150
2151void efx_schedule_reset(struct efx_nic *efx, enum reset_type type)
2152{
2153 enum reset_type method;
2154
2155 if (efx->reset_pending != RESET_TYPE_NONE) {
Ben Hutchings62776d02010-06-23 11:30:07 +00002156 netif_info(efx, drv, efx->net_dev,
2157 "quenching already scheduled reset\n");
Ben Hutchings8ceee662008-04-27 12:55:59 +01002158 return;
2159 }
2160
2161 switch (type) {
2162 case RESET_TYPE_INVISIBLE:
2163 case RESET_TYPE_ALL:
2164 case RESET_TYPE_WORLD:
2165 case RESET_TYPE_DISABLE:
2166 method = type;
2167 break;
2168 case RESET_TYPE_RX_RECOVERY:
2169 case RESET_TYPE_RX_DESC_FETCH:
2170 case RESET_TYPE_TX_DESC_FETCH:
2171 case RESET_TYPE_TX_SKIP:
2172 method = RESET_TYPE_INVISIBLE;
2173 break;
Ben Hutchings8880f4e2009-11-29 15:15:41 +00002174 case RESET_TYPE_MC_FAILURE:
Ben Hutchings8ceee662008-04-27 12:55:59 +01002175 default:
2176 method = RESET_TYPE_ALL;
2177 break;
2178 }
2179
2180 if (method != type)
Ben Hutchings62776d02010-06-23 11:30:07 +00002181 netif_dbg(efx, drv, efx->net_dev,
2182 "scheduling %s reset for %s\n",
2183 RESET_TYPE(method), RESET_TYPE(type));
Ben Hutchings8ceee662008-04-27 12:55:59 +01002184 else
Ben Hutchings62776d02010-06-23 11:30:07 +00002185 netif_dbg(efx, drv, efx->net_dev, "scheduling %s reset\n",
2186 RESET_TYPE(method));
Ben Hutchings8ceee662008-04-27 12:55:59 +01002187
2188 efx->reset_pending = method;
2189
Ben Hutchings8880f4e2009-11-29 15:15:41 +00002190 /* efx_process_channel() will no longer read events once a
2191 * reset is scheduled. So switch back to poll'd MCDI completions. */
2192 efx_mcdi_mode_poll(efx);
2193
Steve Hodgson1ab00622008-12-12 21:33:02 -08002194 queue_work(reset_workqueue, &efx->reset_work);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002195}
2196
2197/**************************************************************************
2198 *
2199 * List of NICs we support
2200 *
2201 **************************************************************************/
2202
2203/* PCI device ID table */
Alexey Dobriyana3aa1882010-01-07 11:58:11 +00002204static DEFINE_PCI_DEVICE_TABLE(efx_pci_table) = {
Ben Hutchings8ceee662008-04-27 12:55:59 +01002205 {PCI_DEVICE(EFX_VENDID_SFC, FALCON_A_P_DEVID),
Ben Hutchingsdaeda632009-11-28 05:36:04 +00002206 .driver_data = (unsigned long) &falcon_a1_nic_type},
Ben Hutchings8ceee662008-04-27 12:55:59 +01002207 {PCI_DEVICE(EFX_VENDID_SFC, FALCON_B_P_DEVID),
Ben Hutchingsdaeda632009-11-28 05:36:04 +00002208 .driver_data = (unsigned long) &falcon_b0_nic_type},
Ben Hutchings8880f4e2009-11-29 15:15:41 +00002209 {PCI_DEVICE(EFX_VENDID_SFC, BETHPAGE_A_P_DEVID),
2210 .driver_data = (unsigned long) &siena_a0_nic_type},
2211 {PCI_DEVICE(EFX_VENDID_SFC, SIENA_A_P_DEVID),
2212 .driver_data = (unsigned long) &siena_a0_nic_type},
Ben Hutchings8ceee662008-04-27 12:55:59 +01002213 {0} /* end of list */
2214};
2215
2216/**************************************************************************
2217 *
Ben Hutchings37594332009-11-23 16:05:45 +00002218 * Dummy PHY/MAC operations
Ben Hutchings8ceee662008-04-27 12:55:59 +01002219 *
Ben Hutchings01aad7b2008-09-01 12:48:36 +01002220 * Can be used for some unimplemented operations
Ben Hutchings8ceee662008-04-27 12:55:59 +01002221 * Needed so all function pointers are valid and do not have to be tested
2222 * before use
2223 *
2224 **************************************************************************/
2225int efx_port_dummy_op_int(struct efx_nic *efx)
2226{
2227 return 0;
2228}
2229void efx_port_dummy_op_void(struct efx_nic *efx) {}
stephen hemmingerd2156972010-10-18 05:27:31 +00002230
2231static bool efx_port_dummy_op_poll(struct efx_nic *efx)
Steve Hodgsonfdaa9ae2009-11-28 05:34:05 +00002232{
2233 return false;
2234}
Ben Hutchings8ceee662008-04-27 12:55:59 +01002235
2236static struct efx_phy_operations efx_dummy_phy_operations = {
2237 .init = efx_port_dummy_op_int,
Ben Hutchingsd3245b22009-11-29 03:42:41 +00002238 .reconfigure = efx_port_dummy_op_int,
Steve Hodgsonfdaa9ae2009-11-28 05:34:05 +00002239 .poll = efx_port_dummy_op_poll,
Ben Hutchings8ceee662008-04-27 12:55:59 +01002240 .fini = efx_port_dummy_op_void,
Ben Hutchings8ceee662008-04-27 12:55:59 +01002241};
2242
Ben Hutchings8ceee662008-04-27 12:55:59 +01002243/**************************************************************************
2244 *
2245 * Data housekeeping
2246 *
2247 **************************************************************************/
2248
2249/* This zeroes out and then fills in the invariants in a struct
2250 * efx_nic (including all sub-structures).
2251 */
2252static int efx_init_struct(struct efx_nic *efx, struct efx_nic_type *type,
2253 struct pci_dev *pci_dev, struct net_device *net_dev)
2254{
Ben Hutchings46426102010-09-10 06:42:33 +00002255 int i;
Ben Hutchings8ceee662008-04-27 12:55:59 +01002256
2257 /* Initialise common structures */
2258 memset(efx, 0, sizeof(*efx));
2259 spin_lock_init(&efx->biu_lock);
Ben Hutchings76884832009-11-29 15:10:44 +00002260#ifdef CONFIG_SFC_MTD
2261 INIT_LIST_HEAD(&efx->mtd_list);
2262#endif
Ben Hutchings8ceee662008-04-27 12:55:59 +01002263 INIT_WORK(&efx->reset_work, efx_reset_work);
2264 INIT_DELAYED_WORK(&efx->monitor_work, efx_monitor);
2265 efx->pci_dev = pci_dev;
Ben Hutchings62776d02010-06-23 11:30:07 +00002266 efx->msg_enable = debug;
Ben Hutchings8ceee662008-04-27 12:55:59 +01002267 efx->state = STATE_INIT;
2268 efx->reset_pending = RESET_TYPE_NONE;
2269 strlcpy(efx->name, pci_name(pci_dev), sizeof(efx->name));
Ben Hutchings8ceee662008-04-27 12:55:59 +01002270
2271 efx->net_dev = net_dev;
Ben Hutchingsdc8cfa52008-09-01 12:46:50 +01002272 efx->rx_checksum_enabled = true;
Ben Hutchings8ceee662008-04-27 12:55:59 +01002273 spin_lock_init(&efx->stats_lock);
2274 mutex_init(&efx->mac_lock);
Steve Hodgsonb895d732009-11-28 05:35:00 +00002275 efx->mac_op = type->default_mac_ops;
Ben Hutchings8ceee662008-04-27 12:55:59 +01002276 efx->phy_op = &efx_dummy_phy_operations;
Ben Hutchings68e7f452009-04-29 08:05:08 +00002277 efx->mdio.dev = net_dev;
Ben Hutchings766ca0f2008-12-12 21:59:24 -08002278 INIT_WORK(&efx->mac_work, efx_mac_work);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002279
2280 for (i = 0; i < EFX_MAX_CHANNELS; i++) {
Ben Hutchings46426102010-09-10 06:42:33 +00002281 efx->channel[i] = efx_alloc_channel(efx, i, NULL);
2282 if (!efx->channel[i])
2283 goto fail;
Ben Hutchings8ceee662008-04-27 12:55:59 +01002284 }
2285
2286 efx->type = type;
2287
Ben Hutchings8ceee662008-04-27 12:55:59 +01002288 EFX_BUG_ON_PARANOID(efx->type->phys_addr_channels > EFX_MAX_CHANNELS);
2289
2290 /* Higher numbered interrupt modes are less capable! */
2291 efx->interrupt_mode = max(efx->type->max_interrupt_mode,
2292 interrupt_mode);
2293
Ben Hutchings6977dc62008-12-26 13:44:39 -08002294 /* Would be good to use the net_dev name, but we're too early */
2295 snprintf(efx->workqueue_name, sizeof(efx->workqueue_name), "sfc%s",
2296 pci_name(pci_dev));
2297 efx->workqueue = create_singlethread_workqueue(efx->workqueue_name);
Steve Hodgson1ab00622008-12-12 21:33:02 -08002298 if (!efx->workqueue)
Ben Hutchings46426102010-09-10 06:42:33 +00002299 goto fail;
Ben Hutchings8d9853d2008-07-18 19:01:20 +01002300
Ben Hutchings8ceee662008-04-27 12:55:59 +01002301 return 0;
Ben Hutchings46426102010-09-10 06:42:33 +00002302
2303fail:
2304 efx_fini_struct(efx);
2305 return -ENOMEM;
Ben Hutchings8ceee662008-04-27 12:55:59 +01002306}
2307
2308static void efx_fini_struct(struct efx_nic *efx)
2309{
Ben Hutchings8313aca2010-09-10 06:41:57 +00002310 int i;
2311
2312 for (i = 0; i < EFX_MAX_CHANNELS; i++)
2313 kfree(efx->channel[i]);
2314
Ben Hutchings8ceee662008-04-27 12:55:59 +01002315 if (efx->workqueue) {
2316 destroy_workqueue(efx->workqueue);
2317 efx->workqueue = NULL;
2318 }
2319}
2320
2321/**************************************************************************
2322 *
2323 * PCI interface
2324 *
2325 **************************************************************************/
2326
2327/* Main body of final NIC shutdown code
2328 * This is called only at module unload (or hotplug removal).
2329 */
2330static void efx_pci_remove_main(struct efx_nic *efx)
2331{
Ben Hutchings64d8ad62011-01-05 00:50:41 +00002332#ifdef CONFIG_RFS_ACCEL
2333 free_irq_cpu_rmap(efx->net_dev->rx_cpu_rmap);
2334 efx->net_dev->rx_cpu_rmap = NULL;
2335#endif
Ben Hutchings152b6a62009-11-29 03:43:56 +00002336 efx_nic_fini_interrupt(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002337 efx_fini_channels(efx);
2338 efx_fini_port(efx);
Ben Hutchingsef2b90e2009-11-29 03:42:31 +00002339 efx->type->fini(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002340 efx_fini_napi(efx);
2341 efx_remove_all(efx);
2342}
2343
2344/* Final NIC shutdown
2345 * This is called only at module unload (or hotplug removal).
2346 */
2347static void efx_pci_remove(struct pci_dev *pci_dev)
2348{
2349 struct efx_nic *efx;
2350
2351 efx = pci_get_drvdata(pci_dev);
2352 if (!efx)
2353 return;
2354
2355 /* Mark the NIC as fini, then stop the interface */
2356 rtnl_lock();
2357 efx->state = STATE_FINI;
2358 dev_close(efx->net_dev);
2359
2360 /* Allow any queued efx_resets() to complete */
2361 rtnl_unlock();
2362
Ben Hutchings8ceee662008-04-27 12:55:59 +01002363 efx_unregister_netdev(efx);
2364
Ben Hutchings7dde5962008-12-12 22:09:38 -08002365 efx_mtd_remove(efx);
2366
Ben Hutchings8ceee662008-04-27 12:55:59 +01002367 /* Wait for any scheduled resets to complete. No more will be
2368 * scheduled from this point because efx_stop_all() has been
2369 * called, we are no longer registered with driverlink, and
2370 * the net_device's have been removed. */
Steve Hodgson1ab00622008-12-12 21:33:02 -08002371 cancel_work_sync(&efx->reset_work);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002372
2373 efx_pci_remove_main(efx);
2374
Ben Hutchings8ceee662008-04-27 12:55:59 +01002375 efx_fini_io(efx);
Ben Hutchings62776d02010-06-23 11:30:07 +00002376 netif_dbg(efx, drv, efx->net_dev, "shutdown successful\n");
Ben Hutchings8ceee662008-04-27 12:55:59 +01002377
2378 pci_set_drvdata(pci_dev, NULL);
2379 efx_fini_struct(efx);
2380 free_netdev(efx->net_dev);
2381};
2382
2383/* Main body of NIC initialisation
2384 * This is called at module load (or hotplug insertion, theoretically).
2385 */
2386static int efx_pci_probe_main(struct efx_nic *efx)
2387{
2388 int rc;
2389
2390 /* Do start-of-day initialisation */
2391 rc = efx_probe_all(efx);
2392 if (rc)
2393 goto fail1;
2394
Ben Hutchingse8f14992010-12-07 19:47:34 +00002395 efx_init_napi(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002396
Ben Hutchingsef2b90e2009-11-29 03:42:31 +00002397 rc = efx->type->init(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002398 if (rc) {
Ben Hutchings62776d02010-06-23 11:30:07 +00002399 netif_err(efx, probe, efx->net_dev,
2400 "failed to initialise NIC\n");
Ben Hutchings278c0622009-11-23 16:05:12 +00002401 goto fail3;
Ben Hutchings8ceee662008-04-27 12:55:59 +01002402 }
2403
2404 rc = efx_init_port(efx);
2405 if (rc) {
Ben Hutchings62776d02010-06-23 11:30:07 +00002406 netif_err(efx, probe, efx->net_dev,
2407 "failed to initialise port\n");
Ben Hutchings278c0622009-11-23 16:05:12 +00002408 goto fail4;
Ben Hutchings8ceee662008-04-27 12:55:59 +01002409 }
2410
Ben Hutchingsbc3c90a2008-09-01 12:48:46 +01002411 efx_init_channels(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002412
Ben Hutchings152b6a62009-11-29 03:43:56 +00002413 rc = efx_nic_init_interrupt(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002414 if (rc)
Ben Hutchings278c0622009-11-23 16:05:12 +00002415 goto fail5;
Ben Hutchings8ceee662008-04-27 12:55:59 +01002416
2417 return 0;
2418
Ben Hutchings278c0622009-11-23 16:05:12 +00002419 fail5:
Ben Hutchingsbc3c90a2008-09-01 12:48:46 +01002420 efx_fini_channels(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002421 efx_fini_port(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002422 fail4:
Ben Hutchingsef2b90e2009-11-29 03:42:31 +00002423 efx->type->fini(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002424 fail3:
2425 efx_fini_napi(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002426 efx_remove_all(efx);
2427 fail1:
2428 return rc;
2429}
2430
2431/* NIC initialisation
2432 *
2433 * This is called at module load (or hotplug insertion,
2434 * theoretically). It sets up PCI mappings, tests and resets the NIC,
2435 * sets up and registers the network devices with the kernel and hooks
2436 * the interrupt service routine. It does not prepare the device for
2437 * transmission; this is left to the first time one of the network
2438 * interfaces is brought up (i.e. efx_net_open).
2439 */
2440static int __devinit efx_pci_probe(struct pci_dev *pci_dev,
2441 const struct pci_device_id *entry)
2442{
2443 struct efx_nic_type *type = (struct efx_nic_type *) entry->driver_data;
2444 struct net_device *net_dev;
2445 struct efx_nic *efx;
2446 int i, rc;
2447
2448 /* Allocate and initialise a struct net_device and struct efx_nic */
Ben Hutchings94b274b2011-01-10 21:18:20 +00002449 net_dev = alloc_etherdev_mqs(sizeof(*efx), EFX_MAX_CORE_TX_QUEUES,
2450 EFX_MAX_RX_QUEUES);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002451 if (!net_dev)
2452 return -ENOMEM;
Ben Hutchingsc383b532009-11-29 15:11:02 +00002453 net_dev->features |= (type->offload_features | NETIF_F_SG |
Ben Hutchings97bc5412009-05-19 16:19:08 -07002454 NETIF_F_HIGHDMA | NETIF_F_TSO |
2455 NETIF_F_GRO);
Ben Hutchings738a8f42009-11-29 15:16:05 +00002456 if (type->offload_features & NETIF_F_V6_CSUM)
2457 net_dev->features |= NETIF_F_TSO6;
Ben Hutchings285065632008-09-01 12:46:54 +01002458 /* Mask for features that also apply to VLAN devices */
2459 net_dev->vlan_features |= (NETIF_F_ALL_CSUM | NETIF_F_SG |
Ben Hutchings740847d2008-09-01 12:48:23 +01002460 NETIF_F_HIGHDMA | NETIF_F_TSO);
Ben Hutchings767e4682008-09-01 12:43:14 +01002461 efx = netdev_priv(net_dev);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002462 pci_set_drvdata(pci_dev, efx);
Ben Hutchings62776d02010-06-23 11:30:07 +00002463 SET_NETDEV_DEV(net_dev, &pci_dev->dev);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002464 rc = efx_init_struct(efx, type, pci_dev, net_dev);
2465 if (rc)
2466 goto fail1;
2467
Ben Hutchings62776d02010-06-23 11:30:07 +00002468 netif_info(efx, probe, efx->net_dev,
2469 "Solarflare Communications NIC detected\n");
Ben Hutchings8ceee662008-04-27 12:55:59 +01002470
2471 /* Set up basic I/O (BAR mappings etc) */
2472 rc = efx_init_io(efx);
2473 if (rc)
2474 goto fail2;
2475
2476 /* No serialisation is required with the reset path because
2477 * we're in STATE_INIT. */
2478 for (i = 0; i < 5; i++) {
2479 rc = efx_pci_probe_main(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002480
2481 /* Serialise against efx_reset(). No more resets will be
2482 * scheduled since efx_stop_all() has been called, and we
2483 * have not and never have been registered with either
2484 * the rtnetlink or driverlink layers. */
Steve Hodgson1ab00622008-12-12 21:33:02 -08002485 cancel_work_sync(&efx->reset_work);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002486
Steve Hodgsonfa402b22008-12-12 22:08:16 -08002487 if (rc == 0) {
2488 if (efx->reset_pending != RESET_TYPE_NONE) {
2489 /* If there was a scheduled reset during
2490 * probe, the NIC is probably hosed anyway */
2491 efx_pci_remove_main(efx);
2492 rc = -EIO;
2493 } else {
2494 break;
2495 }
2496 }
2497
Ben Hutchings8ceee662008-04-27 12:55:59 +01002498 /* Retry if a recoverably reset event has been scheduled */
2499 if ((efx->reset_pending != RESET_TYPE_INVISIBLE) &&
2500 (efx->reset_pending != RESET_TYPE_ALL))
2501 goto fail3;
2502
2503 efx->reset_pending = RESET_TYPE_NONE;
2504 }
2505
2506 if (rc) {
Ben Hutchings62776d02010-06-23 11:30:07 +00002507 netif_err(efx, probe, efx->net_dev, "Could not reset NIC\n");
Ben Hutchings8ceee662008-04-27 12:55:59 +01002508 goto fail4;
2509 }
2510
Ben Hutchings55edc6e2009-11-25 16:11:35 +00002511 /* Switch to the running state before we expose the device to the OS,
2512 * so that dev_open()|efx_start_all() will actually start the device */
Ben Hutchings8ceee662008-04-27 12:55:59 +01002513 efx->state = STATE_RUNNING;
Ben Hutchings7dde5962008-12-12 22:09:38 -08002514
Ben Hutchings8ceee662008-04-27 12:55:59 +01002515 rc = efx_register_netdev(efx);
2516 if (rc)
2517 goto fail5;
2518
Ben Hutchings62776d02010-06-23 11:30:07 +00002519 netif_dbg(efx, probe, efx->net_dev, "initialisation successful\n");
Ben Hutchingsa5211bb2009-10-23 08:33:09 +00002520
2521 rtnl_lock();
2522 efx_mtd_probe(efx); /* allowed to fail */
2523 rtnl_unlock();
Ben Hutchings8ceee662008-04-27 12:55:59 +01002524 return 0;
2525
2526 fail5:
2527 efx_pci_remove_main(efx);
2528 fail4:
2529 fail3:
2530 efx_fini_io(efx);
2531 fail2:
2532 efx_fini_struct(efx);
2533 fail1:
Steve Hodgson5e2a9112010-02-12 12:32:27 -08002534 WARN_ON(rc > 0);
Ben Hutchings62776d02010-06-23 11:30:07 +00002535 netif_dbg(efx, drv, efx->net_dev, "initialisation failed. rc=%d\n", rc);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002536 free_netdev(net_dev);
2537 return rc;
2538}
2539
Ben Hutchings89c758f2009-11-29 03:43:07 +00002540static int efx_pm_freeze(struct device *dev)
2541{
2542 struct efx_nic *efx = pci_get_drvdata(to_pci_dev(dev));
2543
2544 efx->state = STATE_FINI;
2545
2546 netif_device_detach(efx->net_dev);
2547
2548 efx_stop_all(efx);
2549 efx_fini_channels(efx);
2550
2551 return 0;
2552}
2553
2554static int efx_pm_thaw(struct device *dev)
2555{
2556 struct efx_nic *efx = pci_get_drvdata(to_pci_dev(dev));
2557
2558 efx->state = STATE_INIT;
2559
2560 efx_init_channels(efx);
2561
2562 mutex_lock(&efx->mac_lock);
2563 efx->phy_op->reconfigure(efx);
2564 mutex_unlock(&efx->mac_lock);
2565
2566 efx_start_all(efx);
2567
2568 netif_device_attach(efx->net_dev);
2569
2570 efx->state = STATE_RUNNING;
2571
2572 efx->type->resume_wol(efx);
2573
Steve Hodgson319ba642010-06-01 11:17:24 +00002574 /* Reschedule any quenched resets scheduled during efx_pm_freeze() */
2575 queue_work(reset_workqueue, &efx->reset_work);
2576
Ben Hutchings89c758f2009-11-29 03:43:07 +00002577 return 0;
2578}
2579
2580static int efx_pm_poweroff(struct device *dev)
2581{
2582 struct pci_dev *pci_dev = to_pci_dev(dev);
2583 struct efx_nic *efx = pci_get_drvdata(pci_dev);
2584
2585 efx->type->fini(efx);
2586
2587 efx->reset_pending = RESET_TYPE_NONE;
2588
2589 pci_save_state(pci_dev);
2590 return pci_set_power_state(pci_dev, PCI_D3hot);
2591}
2592
2593/* Used for both resume and restore */
2594static int efx_pm_resume(struct device *dev)
2595{
2596 struct pci_dev *pci_dev = to_pci_dev(dev);
2597 struct efx_nic *efx = pci_get_drvdata(pci_dev);
2598 int rc;
2599
2600 rc = pci_set_power_state(pci_dev, PCI_D0);
2601 if (rc)
2602 return rc;
2603 pci_restore_state(pci_dev);
2604 rc = pci_enable_device(pci_dev);
2605 if (rc)
2606 return rc;
2607 pci_set_master(efx->pci_dev);
2608 rc = efx->type->reset(efx, RESET_TYPE_ALL);
2609 if (rc)
2610 return rc;
2611 rc = efx->type->init(efx);
2612 if (rc)
2613 return rc;
2614 efx_pm_thaw(dev);
2615 return 0;
2616}
2617
2618static int efx_pm_suspend(struct device *dev)
2619{
2620 int rc;
2621
2622 efx_pm_freeze(dev);
2623 rc = efx_pm_poweroff(dev);
2624 if (rc)
2625 efx_pm_resume(dev);
2626 return rc;
2627}
2628
2629static struct dev_pm_ops efx_pm_ops = {
2630 .suspend = efx_pm_suspend,
2631 .resume = efx_pm_resume,
2632 .freeze = efx_pm_freeze,
2633 .thaw = efx_pm_thaw,
2634 .poweroff = efx_pm_poweroff,
2635 .restore = efx_pm_resume,
2636};
2637
Ben Hutchings8ceee662008-04-27 12:55:59 +01002638static struct pci_driver efx_pci_driver = {
Ben Hutchingsc5d5f5f2010-06-23 11:30:26 +00002639 .name = KBUILD_MODNAME,
Ben Hutchings8ceee662008-04-27 12:55:59 +01002640 .id_table = efx_pci_table,
2641 .probe = efx_pci_probe,
2642 .remove = efx_pci_remove,
Ben Hutchings89c758f2009-11-29 03:43:07 +00002643 .driver.pm = &efx_pm_ops,
Ben Hutchings8ceee662008-04-27 12:55:59 +01002644};
2645
2646/**************************************************************************
2647 *
2648 * Kernel module interface
2649 *
2650 *************************************************************************/
2651
2652module_param(interrupt_mode, uint, 0444);
2653MODULE_PARM_DESC(interrupt_mode,
2654 "Interrupt mode (0=>MSIX 1=>MSI 2=>legacy)");
2655
2656static int __init efx_init_module(void)
2657{
2658 int rc;
2659
2660 printk(KERN_INFO "Solarflare NET driver v" EFX_DRIVER_VERSION "\n");
2661
2662 rc = register_netdevice_notifier(&efx_netdev_notifier);
2663 if (rc)
2664 goto err_notifier;
2665
Steve Hodgson1ab00622008-12-12 21:33:02 -08002666 reset_workqueue = create_singlethread_workqueue("sfc_reset");
2667 if (!reset_workqueue) {
2668 rc = -ENOMEM;
2669 goto err_reset;
2670 }
Ben Hutchings8ceee662008-04-27 12:55:59 +01002671
2672 rc = pci_register_driver(&efx_pci_driver);
2673 if (rc < 0)
2674 goto err_pci;
2675
2676 return 0;
2677
2678 err_pci:
Steve Hodgson1ab00622008-12-12 21:33:02 -08002679 destroy_workqueue(reset_workqueue);
2680 err_reset:
Ben Hutchings8ceee662008-04-27 12:55:59 +01002681 unregister_netdevice_notifier(&efx_netdev_notifier);
2682 err_notifier:
2683 return rc;
2684}
2685
2686static void __exit efx_exit_module(void)
2687{
2688 printk(KERN_INFO "Solarflare NET driver unloading\n");
2689
2690 pci_unregister_driver(&efx_pci_driver);
Steve Hodgson1ab00622008-12-12 21:33:02 -08002691 destroy_workqueue(reset_workqueue);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002692 unregister_netdevice_notifier(&efx_netdev_notifier);
2693
2694}
2695
2696module_init(efx_init_module);
2697module_exit(efx_exit_module);
2698
Ben Hutchings906bb262009-11-29 15:16:19 +00002699MODULE_AUTHOR("Solarflare Communications and "
2700 "Michael Brown <mbrown@fensystems.co.uk>");
Ben Hutchings8ceee662008-04-27 12:55:59 +01002701MODULE_DESCRIPTION("Solarflare Communications network driver");
2702MODULE_LICENSE("GPL");
2703MODULE_DEVICE_TABLE(pci, efx_pci_table);