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Ben Hutchings8ceee662008-04-27 12:55:59 +01001/****************************************************************************
Ben Hutchingsf7a6d2c2013-08-29 23:32:48 +01002 * Driver for Solarflare network controllers and boards
Ben Hutchings8ceee662008-04-27 12:55:59 +01003 * Copyright 2005-2006 Fen Systems Ltd.
Ben Hutchingsf7a6d2c2013-08-29 23:32:48 +01004 * Copyright 2005-2013 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>
Ben Hutchings8ceee662008-04-27 12:55:59 +010020#include <linux/ethtool.h>
Ben Hutchingsaa6ef272008-07-18 19:03:10 +010021#include <linux/topology.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090022#include <linux/gfp.h>
Alexandre Rames626950d2013-01-14 17:20:22 +000023#include <linux/aer.h>
Alexandre Ramesb28405b2013-03-21 16:41:43 +000024#include <linux/interrupt.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 Hutchingsdd407812012-02-28 23:40:21 +000028#include "selftest.h"
Ben Hutchings8ceee662008-04-27 12:55:59 +010029
Ben Hutchings8880f4e2009-11-29 15:15:41 +000030#include "mcdi.h"
Steve Hodgsonfd371e32010-06-01 11:17:51 +000031#include "workarounds.h"
Ben Hutchings8880f4e2009-11-29 15:15:41 +000032
Ben Hutchingsc4593022009-11-23 16:08:17 +000033/**************************************************************************
34 *
35 * Type name strings
36 *
37 **************************************************************************
38 */
39
40/* Loopback mode names (see LOOPBACK_MODE()) */
41const unsigned int efx_loopback_mode_max = LOOPBACK_MAX;
Ben Hutchings18e83e42012-01-05 19:05:20 +000042const char *const efx_loopback_mode_names[] = {
Ben Hutchingsc4593022009-11-23 16:08:17 +000043 [LOOPBACK_NONE] = "NONE",
Ben Hutchingse58f69f2009-11-29 15:08:41 +000044 [LOOPBACK_DATA] = "DATAPATH",
Ben Hutchingsc4593022009-11-23 16:08:17 +000045 [LOOPBACK_GMAC] = "GMAC",
46 [LOOPBACK_XGMII] = "XGMII",
47 [LOOPBACK_XGXS] = "XGXS",
Ben Hutchings9c636ba2012-01-05 17:19:45 +000048 [LOOPBACK_XAUI] = "XAUI",
49 [LOOPBACK_GMII] = "GMII",
50 [LOOPBACK_SGMII] = "SGMII",
Ben Hutchingse58f69f2009-11-29 15:08:41 +000051 [LOOPBACK_XGBR] = "XGBR",
52 [LOOPBACK_XFI] = "XFI",
53 [LOOPBACK_XAUI_FAR] = "XAUI_FAR",
54 [LOOPBACK_GMII_FAR] = "GMII_FAR",
55 [LOOPBACK_SGMII_FAR] = "SGMII_FAR",
56 [LOOPBACK_XFI_FAR] = "XFI_FAR",
Ben Hutchingsc4593022009-11-23 16:08:17 +000057 [LOOPBACK_GPHY] = "GPHY",
58 [LOOPBACK_PHYXS] = "PHYXS",
Ben Hutchings9c636ba2012-01-05 17:19:45 +000059 [LOOPBACK_PCS] = "PCS",
60 [LOOPBACK_PMAPMD] = "PMA/PMD",
Ben Hutchingse58f69f2009-11-29 15:08:41 +000061 [LOOPBACK_XPORT] = "XPORT",
62 [LOOPBACK_XGMII_WS] = "XGMII_WS",
Ben Hutchings9c636ba2012-01-05 17:19:45 +000063 [LOOPBACK_XAUI_WS] = "XAUI_WS",
Ben Hutchingse58f69f2009-11-29 15:08:41 +000064 [LOOPBACK_XAUI_WS_FAR] = "XAUI_WS_FAR",
65 [LOOPBACK_XAUI_WS_NEAR] = "XAUI_WS_NEAR",
Ben Hutchings9c636ba2012-01-05 17:19:45 +000066 [LOOPBACK_GMII_WS] = "GMII_WS",
Ben Hutchingse58f69f2009-11-29 15:08:41 +000067 [LOOPBACK_XFI_WS] = "XFI_WS",
68 [LOOPBACK_XFI_WS_FAR] = "XFI_WS_FAR",
Ben Hutchings9c636ba2012-01-05 17:19:45 +000069 [LOOPBACK_PHYXS_WS] = "PHYXS_WS",
Ben Hutchingsc4593022009-11-23 16:08:17 +000070};
71
Ben Hutchingsc4593022009-11-23 16:08:17 +000072const unsigned int efx_reset_type_max = RESET_TYPE_MAX;
Ben Hutchings18e83e42012-01-05 19:05:20 +000073const char *const efx_reset_type_names[] = {
Alexandre Rames626950d2013-01-14 17:20:22 +000074 [RESET_TYPE_INVISIBLE] = "INVISIBLE",
75 [RESET_TYPE_ALL] = "ALL",
76 [RESET_TYPE_RECOVER_OR_ALL] = "RECOVER_OR_ALL",
77 [RESET_TYPE_WORLD] = "WORLD",
78 [RESET_TYPE_RECOVER_OR_DISABLE] = "RECOVER_OR_DISABLE",
Edward Creee2835462014-04-16 19:27:48 +010079 [RESET_TYPE_MC_BIST] = "MC_BIST",
Alexandre Rames626950d2013-01-14 17:20:22 +000080 [RESET_TYPE_DISABLE] = "DISABLE",
81 [RESET_TYPE_TX_WATCHDOG] = "TX_WATCHDOG",
82 [RESET_TYPE_INT_ERROR] = "INT_ERROR",
83 [RESET_TYPE_RX_RECOVERY] = "RX_RECOVERY",
Alexandre Rames3de82b92013-06-13 11:36:15 +010084 [RESET_TYPE_DMA_ERROR] = "DMA_ERROR",
Alexandre Rames626950d2013-01-14 17:20:22 +000085 [RESET_TYPE_TX_SKIP] = "TX_SKIP",
86 [RESET_TYPE_MC_FAILURE] = "MC_FAILURE",
Edward Creee2835462014-04-16 19:27:48 +010087 [RESET_TYPE_MCDI_TIMEOUT] = "MCDI_TIMEOUT (FLR)",
Ben Hutchingsc4593022009-11-23 16:08:17 +000088};
89
Steve Hodgson1ab00622008-12-12 21:33:02 -080090/* Reset workqueue. If any NIC has a hardware failure then a reset will be
91 * queued onto this work queue. This is not a per-nic work queue, because
92 * efx_reset_work() acquires the rtnl lock, so resets are naturally serialised.
93 */
94static struct workqueue_struct *reset_workqueue;
95
Jon Cooper74cd60a2013-09-16 14:18:51 +010096/* How often and how many times to poll for a reset while waiting for a
97 * BIST that another function started to complete.
98 */
99#define BIST_WAIT_DELAY_MS 100
100#define BIST_WAIT_DELAY_COUNT 100
101
Ben Hutchings8ceee662008-04-27 12:55:59 +0100102/**************************************************************************
103 *
104 * Configurable values
105 *
106 *************************************************************************/
107
108/*
Ben Hutchings8ceee662008-04-27 12:55:59 +0100109 * Use separate channels for TX and RX events
110 *
Neil Turton28b581a2008-12-12 21:41:06 -0800111 * Set this to 1 to use separate channels for TX and RX. It allows us
112 * to control interrupt affinity separately for TX and RX.
Ben Hutchings8ceee662008-04-27 12:55:59 +0100113 *
Neil Turton28b581a2008-12-12 21:41:06 -0800114 * This is only used in MSI-X interrupt mode
Ben Hutchings8ceee662008-04-27 12:55:59 +0100115 */
Ben Hutchingsb9cc9772012-11-28 04:12:41 +0000116static bool separate_tx_channels;
117module_param(separate_tx_channels, bool, 0444);
Neil Turton28b581a2008-12-12 21:41:06 -0800118MODULE_PARM_DESC(separate_tx_channels,
119 "Use separate channels for TX and RX");
Ben Hutchings8ceee662008-04-27 12:55:59 +0100120
121/* This is the weight assigned to each of the (per-channel) virtual
122 * NAPI devices.
123 */
124static int napi_weight = 64;
125
126/* This is the time (in jiffies) between invocations of the hardware
Alexandre Rames626950d2013-01-14 17:20:22 +0000127 * monitor.
128 * On Falcon-based NICs, this will:
Ben Hutchingse254c272010-09-20 08:44:10 +0000129 * - Check the on-board hardware monitor;
130 * - Poll the link state and reconfigure the hardware as necessary.
Alexandre Rames626950d2013-01-14 17:20:22 +0000131 * On Siena-based NICs for power systems with EEH support, this will give EEH a
132 * chance to start.
Ben Hutchings8ceee662008-04-27 12:55:59 +0100133 */
stephen hemmingerd2156972010-10-18 05:27:31 +0000134static unsigned int efx_monitor_interval = 1 * HZ;
Ben Hutchings8ceee662008-04-27 12:55:59 +0100135
Ben Hutchings8ceee662008-04-27 12:55:59 +0100136/* Initial interrupt moderation settings. They can be modified after
137 * module load with ethtool.
138 *
139 * The default for RX should strike a balance between increasing the
140 * round-trip latency and reducing overhead.
141 */
142static unsigned int rx_irq_mod_usec = 60;
143
144/* Initial interrupt moderation settings. They can be modified after
145 * module load with ethtool.
146 *
147 * This default is chosen to ensure that a 10G link does not go idle
148 * while a TX queue is stopped after it has become full. A queue is
149 * restarted when it drops below half full. The time this takes (assuming
150 * worst case 3 descriptors per packet and 1024 descriptors) is
151 * 512 / 3 * 1.2 = 205 usec.
152 */
153static unsigned int tx_irq_mod_usec = 150;
154
155/* This is the first interrupt mode to try out of:
156 * 0 => MSI-X
157 * 1 => MSI
158 * 2 => legacy
159 */
160static unsigned int interrupt_mode;
161
162/* This is the requested number of CPUs to use for Receive-Side Scaling (RSS),
163 * i.e. the number of CPUs among which we may distribute simultaneous
164 * interrupt handling.
165 *
166 * Cards without MSI-X will only target one CPU via legacy or MSI interrupt.
Ben Hutchingscdb08f82011-12-20 01:08:05 +0000167 * The default (0) means to assign an interrupt to each core.
Ben Hutchings8ceee662008-04-27 12:55:59 +0100168 */
169static unsigned int rss_cpus;
170module_param(rss_cpus, uint, 0444);
171MODULE_PARM_DESC(rss_cpus, "Number of CPUs to use for Receive-Side Scaling");
172
Ben Hutchingsb9cc9772012-11-28 04:12:41 +0000173static bool phy_flash_cfg;
174module_param(phy_flash_cfg, bool, 0644);
Ben Hutchings84ae48f2008-12-12 21:34:54 -0800175MODULE_PARM_DESC(phy_flash_cfg, "Set PHYs into reflash mode initially");
176
Ben Hutchingse7bed9c2012-02-28 18:44:13 +0000177static unsigned irq_adapt_low_thresh = 8000;
Ben Hutchings6fb70fd2009-03-20 13:30:37 +0000178module_param(irq_adapt_low_thresh, uint, 0644);
179MODULE_PARM_DESC(irq_adapt_low_thresh,
180 "Threshold score for reducing IRQ moderation");
181
Ben Hutchingse7bed9c2012-02-28 18:44:13 +0000182static unsigned irq_adapt_high_thresh = 16000;
Ben Hutchings6fb70fd2009-03-20 13:30:37 +0000183module_param(irq_adapt_high_thresh, uint, 0644);
184MODULE_PARM_DESC(irq_adapt_high_thresh,
185 "Threshold score for increasing IRQ moderation");
186
Ben Hutchings62776d02010-06-23 11:30:07 +0000187static unsigned debug = (NETIF_MSG_DRV | NETIF_MSG_PROBE |
188 NETIF_MSG_LINK | NETIF_MSG_IFDOWN |
189 NETIF_MSG_IFUP | NETIF_MSG_RX_ERR |
190 NETIF_MSG_TX_ERR | NETIF_MSG_HW);
191module_param(debug, uint, 0);
192MODULE_PARM_DESC(debug, "Bitmapped debugging message enable value");
193
Ben Hutchings8ceee662008-04-27 12:55:59 +0100194/**************************************************************************
195 *
196 * Utility functions and prototypes
197 *
198 *************************************************************************/
Ben Hutchings46426102010-09-10 06:42:33 +0000199
Jon Cooper261e4d92013-04-15 18:51:54 +0100200static int efx_soft_enable_interrupts(struct efx_nic *efx);
Ben Hutchingsd8291182012-10-05 23:35:41 +0100201static void efx_soft_disable_interrupts(struct efx_nic *efx);
Ben Hutchings7f967c02012-02-13 23:45:02 +0000202static void efx_remove_channel(struct efx_channel *channel);
Ben Hutchings46426102010-09-10 06:42:33 +0000203static void efx_remove_channels(struct efx_nic *efx);
Ben Hutchings7f967c02012-02-13 23:45:02 +0000204static const struct efx_channel_type efx_default_channel_type;
Ben Hutchings8ceee662008-04-27 12:55:59 +0100205static void efx_remove_port(struct efx_nic *efx);
Ben Hutchings7f967c02012-02-13 23:45:02 +0000206static void efx_init_napi_channel(struct efx_channel *channel);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100207static void efx_fini_napi(struct efx_nic *efx);
Ben Hutchingse8f14992010-12-07 19:47:34 +0000208static void efx_fini_napi_channel(struct efx_channel *channel);
Ben Hutchings46426102010-09-10 06:42:33 +0000209static void efx_fini_struct(struct efx_nic *efx);
210static void efx_start_all(struct efx_nic *efx);
211static void efx_stop_all(struct efx_nic *efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100212
213#define EFX_ASSERT_RESET_SERIALISED(efx) \
214 do { \
Ben Hutchingsf16aeea2012-07-27 19:31:16 +0100215 if ((efx->state == STATE_READY) || \
Alexandre Rames626950d2013-01-14 17:20:22 +0000216 (efx->state == STATE_RECOVERY) || \
Ben Hutchings332c1ce2009-11-25 16:08:52 +0000217 (efx->state == STATE_DISABLED)) \
Ben Hutchings8ceee662008-04-27 12:55:59 +0100218 ASSERT_RTNL(); \
219 } while (0)
220
Ben Hutchings8b7325b2012-07-27 20:46:41 +0100221static int efx_check_disabled(struct efx_nic *efx)
222{
Alexandre Rames626950d2013-01-14 17:20:22 +0000223 if (efx->state == STATE_DISABLED || efx->state == STATE_RECOVERY) {
Ben Hutchings8b7325b2012-07-27 20:46:41 +0100224 netif_err(efx, drv, efx->net_dev,
225 "device is disabled due to earlier errors\n");
226 return -EIO;
227 }
228 return 0;
229}
230
Ben Hutchings8ceee662008-04-27 12:55:59 +0100231/**************************************************************************
232 *
233 * Event queue processing
234 *
235 *************************************************************************/
236
237/* Process channel's event queue
238 *
239 * This function is responsible for processing the event queue of a
240 * single channel. The caller must guarantee that this function will
241 * never be concurrently called more than once on the same channel,
242 * though different channels may be being processed concurrently.
243 */
Ben Hutchingsfa236e12010-04-28 09:29:42 +0000244static int efx_process_channel(struct efx_channel *channel, int budget)
Ben Hutchings8ceee662008-04-27 12:55:59 +0100245{
Ben Hutchingsfa236e12010-04-28 09:29:42 +0000246 int spent;
Ben Hutchings8ceee662008-04-27 12:55:59 +0100247
Ben Hutchings9f2cb712012-02-08 00:11:20 +0000248 if (unlikely(!channel->enabled))
Ben Hutchings42cbe2d2008-09-01 12:48:08 +0100249 return 0;
Ben Hutchings8ceee662008-04-27 12:55:59 +0100250
Ben Hutchingsfa236e12010-04-28 09:29:42 +0000251 spent = efx_nic_process_eventq(channel, budget);
Ben Hutchingsd9ab7002012-02-13 23:29:16 +0000252 if (spent && efx_channel_has_rx_queue(channel)) {
253 struct efx_rx_queue *rx_queue =
254 efx_channel_get_rx_queue(channel);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100255
Ben Hutchingsff734ef2013-01-29 23:33:14 +0000256 efx_rx_flush_packet(channel);
Jon Coopercce28792013-10-02 11:04:14 +0100257 efx_fast_push_rx_descriptors(rx_queue, true);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100258 }
259
Ben Hutchingsfa236e12010-04-28 09:29:42 +0000260 return spent;
Ben Hutchings8ceee662008-04-27 12:55:59 +0100261}
262
Ben Hutchings8ceee662008-04-27 12:55:59 +0100263/* NAPI poll handler
264 *
265 * NAPI guarantees serialisation of polls of the same device, which
266 * provides the guarantee required by efx_process_channel().
267 */
268static int efx_poll(struct napi_struct *napi, int budget)
269{
270 struct efx_channel *channel =
271 container_of(napi, struct efx_channel, napi_str);
Ben Hutchings62776d02010-06-23 11:30:07 +0000272 struct efx_nic *efx = channel->efx;
Ben Hutchingsfa236e12010-04-28 09:29:42 +0000273 int spent;
Ben Hutchings8ceee662008-04-27 12:55:59 +0100274
Alexandre Rames36763262014-07-22 14:03:25 +0100275 if (!efx_channel_lock_napi(channel))
276 return budget;
277
Ben Hutchings62776d02010-06-23 11:30:07 +0000278 netif_vdbg(efx, intr, efx->net_dev,
279 "channel %d NAPI poll executing on CPU %d\n",
280 channel->channel, raw_smp_processor_id());
Ben Hutchings8ceee662008-04-27 12:55:59 +0100281
Ben Hutchingsfa236e12010-04-28 09:29:42 +0000282 spent = efx_process_channel(channel, budget);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100283
Ben Hutchingsfa236e12010-04-28 09:29:42 +0000284 if (spent < budget) {
Ben Hutchings9d9a6972012-02-10 23:01:48 +0000285 if (efx_channel_has_rx_queue(channel) &&
Ben Hutchings6fb70fd2009-03-20 13:30:37 +0000286 efx->irq_rx_adaptive &&
287 unlikely(++channel->irq_count == 1000)) {
Ben Hutchings6fb70fd2009-03-20 13:30:37 +0000288 if (unlikely(channel->irq_mod_score <
289 irq_adapt_low_thresh)) {
Ben Hutchings0d86ebd2009-10-23 08:32:13 +0000290 if (channel->irq_moderation > 1) {
291 channel->irq_moderation -= 1;
Ben Hutchingsef2b90e2009-11-29 03:42:31 +0000292 efx->type->push_irq_moderation(channel);
Ben Hutchings0d86ebd2009-10-23 08:32:13 +0000293 }
Ben Hutchings6fb70fd2009-03-20 13:30:37 +0000294 } else if (unlikely(channel->irq_mod_score >
295 irq_adapt_high_thresh)) {
Ben Hutchings0d86ebd2009-10-23 08:32:13 +0000296 if (channel->irq_moderation <
297 efx->irq_rx_moderation) {
298 channel->irq_moderation += 1;
Ben Hutchingsef2b90e2009-11-29 03:42:31 +0000299 efx->type->push_irq_moderation(channel);
Ben Hutchings0d86ebd2009-10-23 08:32:13 +0000300 }
Ben Hutchings6fb70fd2009-03-20 13:30:37 +0000301 }
Ben Hutchings6fb70fd2009-03-20 13:30:37 +0000302 channel->irq_count = 0;
303 channel->irq_mod_score = 0;
304 }
305
Ben Hutchings64d8ad62011-01-05 00:50:41 +0000306 efx_filter_rfs_expire(channel);
307
Ben Hutchings8ceee662008-04-27 12:55:59 +0100308 /* There is no race here; although napi_disable() will
Ben Hutchings288379f2009-01-19 16:43:59 -0800309 * only wait for napi_complete(), this isn't a problem
Ben Hutchings514bedb2012-10-05 19:30:16 +0100310 * since efx_nic_eventq_read_ack() will have no effect if
Ben Hutchings8ceee662008-04-27 12:55:59 +0100311 * interrupts have already been disabled.
312 */
Ben Hutchings288379f2009-01-19 16:43:59 -0800313 napi_complete(napi);
Ben Hutchings514bedb2012-10-05 19:30:16 +0100314 efx_nic_eventq_read_ack(channel);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100315 }
316
Alexandre Rames36763262014-07-22 14:03:25 +0100317 efx_channel_unlock_napi(channel);
Ben Hutchingsfa236e12010-04-28 09:29:42 +0000318 return spent;
Ben Hutchings8ceee662008-04-27 12:55:59 +0100319}
320
Ben Hutchings8ceee662008-04-27 12:55:59 +0100321/* Create event queue
322 * Event queue memory allocations are done only once. If the channel
323 * is reset, the memory buffer will be reused; this guards against
324 * errors during channel reset and also simplifies interrupt handling.
325 */
326static int efx_probe_eventq(struct efx_channel *channel)
327{
Steve Hodgsonecc910f2010-09-10 06:42:22 +0000328 struct efx_nic *efx = channel->efx;
329 unsigned long entries;
330
Ben Hutchings86ee5302012-01-09 19:51:22 +0000331 netif_dbg(efx, probe, efx->net_dev,
Ben Hutchings62776d02010-06-23 11:30:07 +0000332 "chan %d create event queue\n", channel->channel);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100333
Steve Hodgsonecc910f2010-09-10 06:42:22 +0000334 /* Build an event queue with room for one event per tx and rx buffer,
335 * plus some extra for link state events and MCDI completions. */
336 entries = roundup_pow_of_two(efx->rxq_entries + efx->txq_entries + 128);
337 EFX_BUG_ON_PARANOID(entries > EFX_MAX_EVQ_SIZE);
338 channel->eventq_mask = max(entries, EFX_MIN_EVQ_SIZE) - 1;
339
Ben Hutchings152b6a62009-11-29 03:43:56 +0000340 return efx_nic_probe_eventq(channel);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100341}
342
343/* Prepare channel's event queue */
Jon Cooper261e4d92013-04-15 18:51:54 +0100344static int efx_init_eventq(struct efx_channel *channel)
Ben Hutchings8ceee662008-04-27 12:55:59 +0100345{
Ben Hutchings15acb1c2013-05-01 16:30:17 +0100346 struct efx_nic *efx = channel->efx;
Jon Cooper261e4d92013-04-15 18:51:54 +0100347 int rc;
348
349 EFX_WARN_ON_PARANOID(channel->eventq_init);
350
Ben Hutchings15acb1c2013-05-01 16:30:17 +0100351 netif_dbg(efx, drv, efx->net_dev,
Ben Hutchings62776d02010-06-23 11:30:07 +0000352 "chan %d init event queue\n", channel->channel);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100353
Jon Cooper261e4d92013-04-15 18:51:54 +0100354 rc = efx_nic_init_eventq(channel);
355 if (rc == 0) {
Ben Hutchings15acb1c2013-05-01 16:30:17 +0100356 efx->type->push_irq_moderation(channel);
Jon Cooper261e4d92013-04-15 18:51:54 +0100357 channel->eventq_read_ptr = 0;
358 channel->eventq_init = true;
359 }
360 return rc;
Ben Hutchings8ceee662008-04-27 12:55:59 +0100361}
362
Ben Hutchings9f2cb712012-02-08 00:11:20 +0000363/* Enable event queue processing and NAPI */
Alexandre Rames36763262014-07-22 14:03:25 +0100364void efx_start_eventq(struct efx_channel *channel)
Ben Hutchings9f2cb712012-02-08 00:11:20 +0000365{
366 netif_dbg(channel->efx, ifup, channel->efx->net_dev,
367 "chan %d start event queue\n", channel->channel);
368
Ben Hutchings514bedb2012-10-05 19:30:16 +0100369 /* Make sure the NAPI handler sees the enabled flag set */
Ben Hutchings9f2cb712012-02-08 00:11:20 +0000370 channel->enabled = true;
371 smp_wmb();
372
Alexandre Rames36763262014-07-22 14:03:25 +0100373 efx_channel_enable(channel);
Ben Hutchings9f2cb712012-02-08 00:11:20 +0000374 napi_enable(&channel->napi_str);
375 efx_nic_eventq_read_ack(channel);
376}
377
378/* Disable event queue processing and NAPI */
Alexandre Rames36763262014-07-22 14:03:25 +0100379void efx_stop_eventq(struct efx_channel *channel)
Ben Hutchings9f2cb712012-02-08 00:11:20 +0000380{
381 if (!channel->enabled)
382 return;
383
384 napi_disable(&channel->napi_str);
Alexandre Rames36763262014-07-22 14:03:25 +0100385 while (!efx_channel_disable(channel))
386 usleep_range(1000, 20000);
Ben Hutchings9f2cb712012-02-08 00:11:20 +0000387 channel->enabled = false;
388}
389
Ben Hutchings8ceee662008-04-27 12:55:59 +0100390static void efx_fini_eventq(struct efx_channel *channel)
391{
Ben Hutchingsbe3fc092012-10-08 18:21:51 +0100392 if (!channel->eventq_init)
393 return;
394
Ben Hutchings62776d02010-06-23 11:30:07 +0000395 netif_dbg(channel->efx, drv, channel->efx->net_dev,
396 "chan %d fini event queue\n", channel->channel);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100397
Ben Hutchings152b6a62009-11-29 03:43:56 +0000398 efx_nic_fini_eventq(channel);
Ben Hutchingsbe3fc092012-10-08 18:21:51 +0100399 channel->eventq_init = false;
Ben Hutchings8ceee662008-04-27 12:55:59 +0100400}
401
402static void efx_remove_eventq(struct efx_channel *channel)
403{
Ben Hutchings62776d02010-06-23 11:30:07 +0000404 netif_dbg(channel->efx, drv, channel->efx->net_dev,
405 "chan %d remove event queue\n", channel->channel);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100406
Ben Hutchings152b6a62009-11-29 03:43:56 +0000407 efx_nic_remove_eventq(channel);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100408}
409
410/**************************************************************************
411 *
412 * Channel handling
413 *
414 *************************************************************************/
415
Ben Hutchings7f967c02012-02-13 23:45:02 +0000416/* Allocate and initialise a channel structure. */
Ben Hutchings46426102010-09-10 06:42:33 +0000417static struct efx_channel *
418efx_alloc_channel(struct efx_nic *efx, int i, struct efx_channel *old_channel)
419{
420 struct efx_channel *channel;
421 struct efx_rx_queue *rx_queue;
422 struct efx_tx_queue *tx_queue;
423 int j;
424
Ben Hutchings7f967c02012-02-13 23:45:02 +0000425 channel = kzalloc(sizeof(*channel), GFP_KERNEL);
426 if (!channel)
427 return NULL;
Ben Hutchings46426102010-09-10 06:42:33 +0000428
Ben Hutchings7f967c02012-02-13 23:45:02 +0000429 channel->efx = efx;
430 channel->channel = i;
431 channel->type = &efx_default_channel_type;
Ben Hutchings46426102010-09-10 06:42:33 +0000432
Ben Hutchings7f967c02012-02-13 23:45:02 +0000433 for (j = 0; j < EFX_TXQ_TYPES; j++) {
434 tx_queue = &channel->tx_queue[j];
435 tx_queue->efx = efx;
436 tx_queue->queue = i * EFX_TXQ_TYPES + j;
437 tx_queue->channel = channel;
Ben Hutchings46426102010-09-10 06:42:33 +0000438 }
439
Ben Hutchings46426102010-09-10 06:42:33 +0000440 rx_queue = &channel->rx_queue;
441 rx_queue->efx = efx;
442 setup_timer(&rx_queue->slow_fill, efx_rx_slow_fill,
443 (unsigned long)rx_queue);
444
445 return channel;
446}
447
Ben Hutchings7f967c02012-02-13 23:45:02 +0000448/* Allocate and initialise a channel structure, copying parameters
449 * (but not resources) from an old channel structure.
450 */
451static struct efx_channel *
452efx_copy_channel(const struct efx_channel *old_channel)
453{
454 struct efx_channel *channel;
455 struct efx_rx_queue *rx_queue;
456 struct efx_tx_queue *tx_queue;
457 int j;
458
459 channel = kmalloc(sizeof(*channel), GFP_KERNEL);
460 if (!channel)
461 return NULL;
462
463 *channel = *old_channel;
464
465 channel->napi_dev = NULL;
466 memset(&channel->eventq, 0, sizeof(channel->eventq));
467
468 for (j = 0; j < EFX_TXQ_TYPES; j++) {
469 tx_queue = &channel->tx_queue[j];
470 if (tx_queue->channel)
471 tx_queue->channel = channel;
472 tx_queue->buffer = NULL;
473 memset(&tx_queue->txd, 0, sizeof(tx_queue->txd));
474 }
475
476 rx_queue = &channel->rx_queue;
477 rx_queue->buffer = NULL;
478 memset(&rx_queue->rxd, 0, sizeof(rx_queue->rxd));
479 setup_timer(&rx_queue->slow_fill, efx_rx_slow_fill,
480 (unsigned long)rx_queue);
481
482 return channel;
483}
484
Ben Hutchings8ceee662008-04-27 12:55:59 +0100485static int efx_probe_channel(struct efx_channel *channel)
486{
487 struct efx_tx_queue *tx_queue;
488 struct efx_rx_queue *rx_queue;
489 int rc;
490
Ben Hutchings62776d02010-06-23 11:30:07 +0000491 netif_dbg(channel->efx, probe, channel->efx->net_dev,
492 "creating channel %d\n", channel->channel);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100493
Ben Hutchings7f967c02012-02-13 23:45:02 +0000494 rc = channel->type->pre_probe(channel);
495 if (rc)
496 goto fail;
497
Ben Hutchings8ceee662008-04-27 12:55:59 +0100498 rc = efx_probe_eventq(channel);
499 if (rc)
Ben Hutchings7f967c02012-02-13 23:45:02 +0000500 goto fail;
Ben Hutchings8ceee662008-04-27 12:55:59 +0100501
502 efx_for_each_channel_tx_queue(tx_queue, channel) {
503 rc = efx_probe_tx_queue(tx_queue);
504 if (rc)
Ben Hutchings7f967c02012-02-13 23:45:02 +0000505 goto fail;
Ben Hutchings8ceee662008-04-27 12:55:59 +0100506 }
507
508 efx_for_each_channel_rx_queue(rx_queue, channel) {
509 rc = efx_probe_rx_queue(rx_queue);
510 if (rc)
Ben Hutchings7f967c02012-02-13 23:45:02 +0000511 goto fail;
Ben Hutchings8ceee662008-04-27 12:55:59 +0100512 }
513
Ben Hutchings8ceee662008-04-27 12:55:59 +0100514 return 0;
515
Ben Hutchings7f967c02012-02-13 23:45:02 +0000516fail:
517 efx_remove_channel(channel);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100518 return rc;
519}
520
Ben Hutchings7f967c02012-02-13 23:45:02 +0000521static void
522efx_get_channel_name(struct efx_channel *channel, char *buf, size_t len)
523{
524 struct efx_nic *efx = channel->efx;
525 const char *type;
526 int number;
527
528 number = channel->channel;
529 if (efx->tx_channel_offset == 0) {
530 type = "";
531 } else if (channel->channel < efx->tx_channel_offset) {
532 type = "-rx";
533 } else {
534 type = "-tx";
535 number -= efx->tx_channel_offset;
536 }
537 snprintf(buf, len, "%s%s-%d", efx->name, type, number);
538}
Ben Hutchings8ceee662008-04-27 12:55:59 +0100539
Ben Hutchings56536e92008-12-12 21:37:02 -0800540static void efx_set_channel_names(struct efx_nic *efx)
541{
542 struct efx_channel *channel;
Ben Hutchings56536e92008-12-12 21:37:02 -0800543
Ben Hutchings7f967c02012-02-13 23:45:02 +0000544 efx_for_each_channel(channel, efx)
545 channel->type->get_name(channel,
Ben Hutchingsd8291182012-10-05 23:35:41 +0100546 efx->msi_context[channel->channel].name,
547 sizeof(efx->msi_context[0].name));
Ben Hutchings56536e92008-12-12 21:37:02 -0800548}
549
Ben Hutchings46426102010-09-10 06:42:33 +0000550static int efx_probe_channels(struct efx_nic *efx)
551{
552 struct efx_channel *channel;
553 int rc;
554
555 /* Restart special buffer allocation */
556 efx->next_buffer_table = 0;
557
Ben Hutchingsc92aaff2012-02-21 23:22:00 +0000558 /* Probe channels in reverse, so that any 'extra' channels
559 * use the start of the buffer table. This allows the traffic
560 * channels to be resized without moving them or wasting the
561 * entries before them.
562 */
563 efx_for_each_channel_rev(channel, efx) {
Ben Hutchings46426102010-09-10 06:42:33 +0000564 rc = efx_probe_channel(channel);
565 if (rc) {
566 netif_err(efx, probe, efx->net_dev,
567 "failed to create channel %d\n",
568 channel->channel);
569 goto fail;
570 }
571 }
572 efx_set_channel_names(efx);
573
574 return 0;
575
576fail:
577 efx_remove_channels(efx);
578 return rc;
579}
580
Ben Hutchings8ceee662008-04-27 12:55:59 +0100581/* Channels are shutdown and reinitialised whilst the NIC is running
582 * to propagate configuration changes (mtu, checksum offload), or
583 * to clear hardware error conditions
584 */
Ben Hutchings9f2cb712012-02-08 00:11:20 +0000585static void efx_start_datapath(struct efx_nic *efx)
Ben Hutchings8ceee662008-04-27 12:55:59 +0100586{
Ben Hutchings85740cdf2013-01-29 23:33:15 +0000587 bool old_rx_scatter = efx->rx_scatter;
Ben Hutchings8ceee662008-04-27 12:55:59 +0100588 struct efx_tx_queue *tx_queue;
589 struct efx_rx_queue *rx_queue;
590 struct efx_channel *channel;
Ben Hutchings85740cdf2013-01-29 23:33:15 +0000591 size_t rx_buf_len;
Ben Hutchings8ceee662008-04-27 12:55:59 +0100592
Ben Hutchingsf7f13b02008-05-16 21:15:06 +0100593 /* Calculate the rx buffer allocation parameters required to
594 * support the current MTU, including padding for header
595 * alignment and overruns.
596 */
Jon Cooper43a37392012-10-18 15:49:54 +0100597 efx->rx_dma_len = (efx->rx_prefix_size +
Ben Hutchings272baee2013-01-29 23:33:14 +0000598 EFX_MAX_FRAME_LEN(efx->net_dev->mtu) +
599 efx->type->rx_buffer_padding);
Ben Hutchings85740cdf2013-01-29 23:33:15 +0000600 rx_buf_len = (sizeof(struct efx_rx_page_state) +
Andrew Rybchenko2ec03012013-11-16 11:02:27 +0400601 efx->rx_ip_align + efx->rx_dma_len);
Ben Hutchings85740cdf2013-01-29 23:33:15 +0000602 if (rx_buf_len <= PAGE_SIZE) {
Jon Coopere8c68c02013-03-08 10:18:28 +0000603 efx->rx_scatter = efx->type->always_rx_scatter;
Ben Hutchings85740cdf2013-01-29 23:33:15 +0000604 efx->rx_buffer_order = 0;
Ben Hutchings85740cdf2013-01-29 23:33:15 +0000605 } else if (efx->type->can_rx_scatter) {
Ben Hutchings950c54d2013-05-13 12:01:22 +0000606 BUILD_BUG_ON(EFX_RX_USR_BUF_SIZE % L1_CACHE_BYTES);
Ben Hutchings85740cdf2013-01-29 23:33:15 +0000607 BUILD_BUG_ON(sizeof(struct efx_rx_page_state) +
Ben Hutchings950c54d2013-05-13 12:01:22 +0000608 2 * ALIGN(NET_IP_ALIGN + EFX_RX_USR_BUF_SIZE,
609 EFX_RX_BUF_ALIGNMENT) >
610 PAGE_SIZE);
Ben Hutchings85740cdf2013-01-29 23:33:15 +0000611 efx->rx_scatter = true;
612 efx->rx_dma_len = EFX_RX_USR_BUF_SIZE;
613 efx->rx_buffer_order = 0;
Ben Hutchings85740cdf2013-01-29 23:33:15 +0000614 } else {
615 efx->rx_scatter = false;
616 efx->rx_buffer_order = get_order(rx_buf_len);
Ben Hutchings85740cdf2013-01-29 23:33:15 +0000617 }
618
Daniel Pieczko1648a232013-02-13 10:54:41 +0000619 efx_rx_config_page_split(efx);
620 if (efx->rx_buffer_order)
621 netif_dbg(efx, drv, efx->net_dev,
622 "RX buf len=%u; page order=%u batch=%u\n",
623 efx->rx_dma_len, efx->rx_buffer_order,
624 efx->rx_pages_per_batch);
625 else
626 netif_dbg(efx, drv, efx->net_dev,
627 "RX buf len=%u step=%u bpp=%u; page batch=%u\n",
628 efx->rx_dma_len, efx->rx_page_buf_step,
629 efx->rx_bufs_per_page, efx->rx_pages_per_batch);
Daniel Pieczko27689352013-02-13 10:54:41 +0000630
Jon Coopere8c68c02013-03-08 10:18:28 +0000631 /* RX filters may also have scatter-enabled flags */
Ben Hutchings85740cdf2013-01-29 23:33:15 +0000632 if (efx->rx_scatter != old_rx_scatter)
Ben Hutchingsadd72472012-11-08 01:46:53 +0000633 efx->type->filter_update_rx_scatter(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100634
Ben Hutchings14bf7182012-05-22 01:27:58 +0100635 /* We must keep at least one descriptor in a TX ring empty.
636 * We could avoid this when the queue size does not exactly
637 * match the hardware ring size, but it's not that important.
638 * Therefore we stop the queue when one more skb might fill
639 * the ring completely. We wake it when half way back to
640 * empty.
641 */
642 efx->txq_stop_thresh = efx->txq_entries - efx_tx_max_skb_descs(efx);
643 efx->txq_wake_thresh = efx->txq_stop_thresh / 2;
644
Ben Hutchings8ceee662008-04-27 12:55:59 +0100645 /* Initialise the channels */
646 efx_for_each_channel(channel, efx) {
Alexandre Rames3881d8a2013-06-10 11:03:21 +0100647 efx_for_each_channel_tx_queue(tx_queue, channel) {
Ben Hutchingsbc3c90a2008-09-01 12:48:46 +0100648 efx_init_tx_queue(tx_queue);
Alexandre Rames3881d8a2013-06-10 11:03:21 +0100649 atomic_inc(&efx->active_queues);
650 }
Ben Hutchings8ceee662008-04-27 12:55:59 +0100651
Ben Hutchings9f2cb712012-02-08 00:11:20 +0000652 efx_for_each_channel_rx_queue(rx_queue, channel) {
Ben Hutchingsbc3c90a2008-09-01 12:48:46 +0100653 efx_init_rx_queue(rx_queue);
Alexandre Rames3881d8a2013-06-10 11:03:21 +0100654 atomic_inc(&efx->active_queues);
Jon Coopercce28792013-10-02 11:04:14 +0100655 efx_stop_eventq(channel);
656 efx_fast_push_rx_descriptors(rx_queue, false);
657 efx_start_eventq(channel);
Ben Hutchings9f2cb712012-02-08 00:11:20 +0000658 }
Ben Hutchings8ceee662008-04-27 12:55:59 +0100659
Ben Hutchings85740cdf2013-01-29 23:33:15 +0000660 WARN_ON(channel->rx_pkt_n_frags);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100661 }
Ben Hutchings9f2cb712012-02-08 00:11:20 +0000662
Alexandre Rames2ea4dc22013-11-08 10:20:31 +0000663 efx_ptp_start_datapath(efx);
664
Ben Hutchings9f2cb712012-02-08 00:11:20 +0000665 if (netif_device_present(efx->net_dev))
666 netif_tx_wake_all_queues(efx->net_dev);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100667}
668
Ben Hutchings9f2cb712012-02-08 00:11:20 +0000669static void efx_stop_datapath(struct efx_nic *efx)
Ben Hutchings8ceee662008-04-27 12:55:59 +0100670{
671 struct efx_channel *channel;
672 struct efx_tx_queue *tx_queue;
673 struct efx_rx_queue *rx_queue;
Ben Hutchings6bc5d3a2008-09-01 12:49:37 +0100674 int rc;
Ben Hutchings8ceee662008-04-27 12:55:59 +0100675
676 EFX_ASSERT_RESET_SERIALISED(efx);
677 BUG_ON(efx->port_enabled);
678
Alexandre Rames2ea4dc22013-11-08 10:20:31 +0000679 efx_ptp_stop_datapath(efx);
680
Ben Hutchingsd8aec742013-05-27 16:52:54 +0100681 /* Stop RX refill */
682 efx_for_each_channel(channel, efx) {
683 efx_for_each_channel_rx_queue(rx_queue, channel)
684 rx_queue->refill_enabled = false;
685 }
686
Ben Hutchings8ceee662008-04-27 12:55:59 +0100687 efx_for_each_channel(channel, efx) {
Ben Hutchings9f2cb712012-02-08 00:11:20 +0000688 /* RX packet processing is pipelined, so wait for the
689 * NAPI handler to complete. At least event queue 0
690 * might be kept active by non-data events, so don't
691 * use napi_synchronize() but actually disable NAPI
692 * temporarily.
693 */
694 if (efx_channel_has_rx_queue(channel)) {
695 efx_stop_eventq(channel);
696 efx_start_eventq(channel);
697 }
Ben Hutchingse42c3d82013-05-27 16:52:54 +0100698 }
Ben Hutchings8ceee662008-04-27 12:55:59 +0100699
Ben Hutchingse42c3d82013-05-27 16:52:54 +0100700 rc = efx->type->fini_dmaq(efx);
701 if (rc && EFX_WORKAROUND_7803(efx)) {
702 /* Schedule a reset to recover from the flush failure. The
703 * descriptor caches reference memory we're about to free,
704 * but falcon_reconfigure_mac_wrapper() won't reconnect
705 * the MACs because of the pending reset.
706 */
707 netif_err(efx, drv, efx->net_dev,
708 "Resetting to recover from flush failure\n");
709 efx_schedule_reset(efx, RESET_TYPE_ALL);
710 } else if (rc) {
711 netif_err(efx, drv, efx->net_dev, "failed to flush queues\n");
712 } else {
713 netif_dbg(efx, drv, efx->net_dev,
714 "successfully flushed all queues\n");
715 }
716
717 efx_for_each_channel(channel, efx) {
Ben Hutchings8ceee662008-04-27 12:55:59 +0100718 efx_for_each_channel_rx_queue(rx_queue, channel)
719 efx_fini_rx_queue(rx_queue);
Ben Hutchings94b274b2011-01-10 21:18:20 +0000720 efx_for_each_possible_channel_tx_queue(tx_queue, channel)
Ben Hutchings8ceee662008-04-27 12:55:59 +0100721 efx_fini_tx_queue(tx_queue);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100722 }
723}
724
725static void efx_remove_channel(struct efx_channel *channel)
726{
727 struct efx_tx_queue *tx_queue;
728 struct efx_rx_queue *rx_queue;
729
Ben Hutchings62776d02010-06-23 11:30:07 +0000730 netif_dbg(channel->efx, drv, channel->efx->net_dev,
731 "destroy chan %d\n", channel->channel);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100732
733 efx_for_each_channel_rx_queue(rx_queue, channel)
734 efx_remove_rx_queue(rx_queue);
Ben Hutchings94b274b2011-01-10 21:18:20 +0000735 efx_for_each_possible_channel_tx_queue(tx_queue, channel)
Ben Hutchings8ceee662008-04-27 12:55:59 +0100736 efx_remove_tx_queue(tx_queue);
737 efx_remove_eventq(channel);
Stuart Hodgsonc31e5f92012-07-18 09:52:11 +0100738 channel->type->post_remove(channel);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100739}
740
Ben Hutchings46426102010-09-10 06:42:33 +0000741static void efx_remove_channels(struct efx_nic *efx)
742{
743 struct efx_channel *channel;
744
745 efx_for_each_channel(channel, efx)
746 efx_remove_channel(channel);
747}
748
749int
750efx_realloc_channels(struct efx_nic *efx, u32 rxq_entries, u32 txq_entries)
751{
752 struct efx_channel *other_channel[EFX_MAX_CHANNELS], *channel;
753 u32 old_rxq_entries, old_txq_entries;
Ben Hutchings7f967c02012-02-13 23:45:02 +0000754 unsigned i, next_buffer_table = 0;
Jon Cooper261e4d92013-04-15 18:51:54 +0100755 int rc, rc2;
Ben Hutchings8b7325b2012-07-27 20:46:41 +0100756
757 rc = efx_check_disabled(efx);
758 if (rc)
759 return rc;
Ben Hutchings7f967c02012-02-13 23:45:02 +0000760
761 /* Not all channels should be reallocated. We must avoid
762 * reallocating their buffer table entries.
763 */
764 efx_for_each_channel(channel, efx) {
765 struct efx_rx_queue *rx_queue;
766 struct efx_tx_queue *tx_queue;
767
768 if (channel->type->copy)
769 continue;
770 next_buffer_table = max(next_buffer_table,
771 channel->eventq.index +
772 channel->eventq.entries);
773 efx_for_each_channel_rx_queue(rx_queue, channel)
774 next_buffer_table = max(next_buffer_table,
775 rx_queue->rxd.index +
776 rx_queue->rxd.entries);
777 efx_for_each_channel_tx_queue(tx_queue, channel)
778 next_buffer_table = max(next_buffer_table,
779 tx_queue->txd.index +
780 tx_queue->txd.entries);
781 }
Ben Hutchings46426102010-09-10 06:42:33 +0000782
Ben Hutchings29c69a42013-01-28 19:01:06 +0000783 efx_device_detach_sync(efx);
Ben Hutchings46426102010-09-10 06:42:33 +0000784 efx_stop_all(efx);
Ben Hutchingsd8291182012-10-05 23:35:41 +0100785 efx_soft_disable_interrupts(efx);
Ben Hutchings46426102010-09-10 06:42:33 +0000786
Ben Hutchings7f967c02012-02-13 23:45:02 +0000787 /* Clone channels (where possible) */
Ben Hutchings46426102010-09-10 06:42:33 +0000788 memset(other_channel, 0, sizeof(other_channel));
789 for (i = 0; i < efx->n_channels; i++) {
Ben Hutchings7f967c02012-02-13 23:45:02 +0000790 channel = efx->channel[i];
791 if (channel->type->copy)
792 channel = channel->type->copy(channel);
Ben Hutchings46426102010-09-10 06:42:33 +0000793 if (!channel) {
794 rc = -ENOMEM;
795 goto out;
796 }
797 other_channel[i] = channel;
798 }
799
800 /* Swap entry counts and channel pointers */
801 old_rxq_entries = efx->rxq_entries;
802 old_txq_entries = efx->txq_entries;
803 efx->rxq_entries = rxq_entries;
804 efx->txq_entries = txq_entries;
805 for (i = 0; i < efx->n_channels; i++) {
806 channel = efx->channel[i];
807 efx->channel[i] = other_channel[i];
808 other_channel[i] = channel;
809 }
810
Ben Hutchings7f967c02012-02-13 23:45:02 +0000811 /* Restart buffer table allocation */
812 efx->next_buffer_table = next_buffer_table;
Ben Hutchings46426102010-09-10 06:42:33 +0000813
Ben Hutchingse8f14992010-12-07 19:47:34 +0000814 for (i = 0; i < efx->n_channels; i++) {
Ben Hutchings7f967c02012-02-13 23:45:02 +0000815 channel = efx->channel[i];
816 if (!channel->type->copy)
817 continue;
818 rc = efx_probe_channel(channel);
819 if (rc)
820 goto rollback;
821 efx_init_napi_channel(efx->channel[i]);
Ben Hutchingse8f14992010-12-07 19:47:34 +0000822 }
Ben Hutchings46426102010-09-10 06:42:33 +0000823
Ben Hutchings7f967c02012-02-13 23:45:02 +0000824out:
825 /* Destroy unused channel structures */
826 for (i = 0; i < efx->n_channels; i++) {
827 channel = other_channel[i];
828 if (channel && channel->type->copy) {
829 efx_fini_napi_channel(channel);
830 efx_remove_channel(channel);
831 kfree(channel);
832 }
833 }
834
Jon Cooper261e4d92013-04-15 18:51:54 +0100835 rc2 = efx_soft_enable_interrupts(efx);
836 if (rc2) {
837 rc = rc ? rc : rc2;
838 netif_err(efx, drv, efx->net_dev,
839 "unable to restart interrupts on channel reallocation\n");
840 efx_schedule_reset(efx, RESET_TYPE_DISABLE);
841 } else {
842 efx_start_all(efx);
843 netif_device_attach(efx->net_dev);
844 }
Ben Hutchings46426102010-09-10 06:42:33 +0000845 return rc;
846
847rollback:
848 /* Swap back */
849 efx->rxq_entries = old_rxq_entries;
850 efx->txq_entries = old_txq_entries;
851 for (i = 0; i < efx->n_channels; i++) {
852 channel = efx->channel[i];
853 efx->channel[i] = other_channel[i];
854 other_channel[i] = channel;
855 }
856 goto out;
857}
858
Steve Hodgson90d683a2010-06-01 11:19:39 +0000859void efx_schedule_slow_fill(struct efx_rx_queue *rx_queue)
Ben Hutchings8ceee662008-04-27 12:55:59 +0100860{
Steve Hodgson90d683a2010-06-01 11:19:39 +0000861 mod_timer(&rx_queue->slow_fill, jiffies + msecs_to_jiffies(100));
Ben Hutchings8ceee662008-04-27 12:55:59 +0100862}
863
Ben Hutchings7f967c02012-02-13 23:45:02 +0000864static const struct efx_channel_type efx_default_channel_type = {
865 .pre_probe = efx_channel_dummy_op_int,
Stuart Hodgsonc31e5f92012-07-18 09:52:11 +0100866 .post_remove = efx_channel_dummy_op_void,
Ben Hutchings7f967c02012-02-13 23:45:02 +0000867 .get_name = efx_get_channel_name,
868 .copy = efx_copy_channel,
869 .keep_eventq = false,
870};
871
872int efx_channel_dummy_op_int(struct efx_channel *channel)
873{
874 return 0;
875}
876
Stuart Hodgsonc31e5f92012-07-18 09:52:11 +0100877void efx_channel_dummy_op_void(struct efx_channel *channel)
878{
879}
880
Ben Hutchings8ceee662008-04-27 12:55:59 +0100881/**************************************************************************
882 *
883 * Port handling
884 *
885 **************************************************************************/
886
887/* This ensures that the kernel is kept informed (via
888 * netif_carrier_on/off) of the link status, and also maintains the
889 * link status's stop on the port's TX queue.
890 */
Steve Hodgsonfdaa9ae2009-11-28 05:34:05 +0000891void efx_link_status_changed(struct efx_nic *efx)
Ben Hutchings8ceee662008-04-27 12:55:59 +0100892{
Ben Hutchingseb50c0d2009-11-23 16:06:30 +0000893 struct efx_link_state *link_state = &efx->link_state;
894
Ben Hutchings8ceee662008-04-27 12:55:59 +0100895 /* SFC Bug 5356: A net_dev notifier is registered, so we must ensure
896 * that no events are triggered between unregister_netdev() and the
897 * driver unloading. A more general condition is that NETDEV_CHANGE
898 * can only be generated between NETDEV_UP and NETDEV_DOWN */
899 if (!netif_running(efx->net_dev))
900 return;
901
Ben Hutchingseb50c0d2009-11-23 16:06:30 +0000902 if (link_state->up != netif_carrier_ok(efx->net_dev)) {
Ben Hutchings8ceee662008-04-27 12:55:59 +0100903 efx->n_link_state_changes++;
904
Ben Hutchingseb50c0d2009-11-23 16:06:30 +0000905 if (link_state->up)
Ben Hutchings8ceee662008-04-27 12:55:59 +0100906 netif_carrier_on(efx->net_dev);
907 else
908 netif_carrier_off(efx->net_dev);
909 }
910
911 /* Status message for kernel log */
Ben Hutchings2aa9ef12012-01-09 19:53:41 +0000912 if (link_state->up)
Ben Hutchings62776d02010-06-23 11:30:07 +0000913 netif_info(efx, link, efx->net_dev,
Ben Hutchings964e6132012-11-19 23:08:22 +0000914 "link up at %uMbps %s-duplex (MTU %d)\n",
Ben Hutchings62776d02010-06-23 11:30:07 +0000915 link_state->speed, link_state->fd ? "full" : "half",
Ben Hutchings964e6132012-11-19 23:08:22 +0000916 efx->net_dev->mtu);
Ben Hutchings2aa9ef12012-01-09 19:53:41 +0000917 else
Ben Hutchings62776d02010-06-23 11:30:07 +0000918 netif_info(efx, link, efx->net_dev, "link down\n");
Ben Hutchings8ceee662008-04-27 12:55:59 +0100919}
920
Ben Hutchingsd3245b22009-11-29 03:42:41 +0000921void efx_link_set_advertising(struct efx_nic *efx, u32 advertising)
922{
923 efx->link_advertising = advertising;
924 if (advertising) {
925 if (advertising & ADVERTISED_Pause)
926 efx->wanted_fc |= (EFX_FC_TX | EFX_FC_RX);
927 else
928 efx->wanted_fc &= ~(EFX_FC_TX | EFX_FC_RX);
929 if (advertising & ADVERTISED_Asym_Pause)
930 efx->wanted_fc ^= EFX_FC_TX;
931 }
932}
933
David S. Millerb56269462011-05-17 17:53:22 -0400934void efx_link_set_wanted_fc(struct efx_nic *efx, u8 wanted_fc)
Ben Hutchingsd3245b22009-11-29 03:42:41 +0000935{
936 efx->wanted_fc = wanted_fc;
937 if (efx->link_advertising) {
938 if (wanted_fc & EFX_FC_RX)
939 efx->link_advertising |= (ADVERTISED_Pause |
940 ADVERTISED_Asym_Pause);
941 else
942 efx->link_advertising &= ~(ADVERTISED_Pause |
943 ADVERTISED_Asym_Pause);
944 if (wanted_fc & EFX_FC_TX)
945 efx->link_advertising ^= ADVERTISED_Asym_Pause;
946 }
947}
948
Ben Hutchings115122a2009-03-04 09:52:52 +0000949static void efx_fini_port(struct efx_nic *efx);
950
Ben Hutchingsd3245b22009-11-29 03:42:41 +0000951/* Push loopback/power/transmit disable settings to the PHY, and reconfigure
952 * the MAC appropriately. All other PHY configuration changes are pushed
953 * through phy_op->set_settings(), and pushed asynchronously to the MAC
954 * through efx_monitor().
955 *
956 * Callers must hold the mac_lock
957 */
958int __efx_reconfigure_port(struct efx_nic *efx)
Ben Hutchings8ceee662008-04-27 12:55:59 +0100959{
Ben Hutchingsd3245b22009-11-29 03:42:41 +0000960 enum efx_phy_mode phy_mode;
961 int rc;
Ben Hutchings8ceee662008-04-27 12:55:59 +0100962
Ben Hutchingsd3245b22009-11-29 03:42:41 +0000963 WARN_ON(!mutex_is_locked(&efx->mac_lock));
Ben Hutchings8ceee662008-04-27 12:55:59 +0100964
Ben Hutchingsd3245b22009-11-29 03:42:41 +0000965 /* Disable PHY transmit in mac level loopbacks */
966 phy_mode = efx->phy_mode;
Ben Hutchings177dfcd2008-12-12 21:50:08 -0800967 if (LOOPBACK_INTERNAL(efx))
968 efx->phy_mode |= PHY_MODE_TX_DISABLED;
969 else
970 efx->phy_mode &= ~PHY_MODE_TX_DISABLED;
Ben Hutchings177dfcd2008-12-12 21:50:08 -0800971
Ben Hutchingsd3245b22009-11-29 03:42:41 +0000972 rc = efx->type->reconfigure_port(efx);
Ben Hutchings177dfcd2008-12-12 21:50:08 -0800973
Ben Hutchingsd3245b22009-11-29 03:42:41 +0000974 if (rc)
975 efx->phy_mode = phy_mode;
Ben Hutchings8ceee662008-04-27 12:55:59 +0100976
Ben Hutchingsd3245b22009-11-29 03:42:41 +0000977 return rc;
Ben Hutchings8ceee662008-04-27 12:55:59 +0100978}
979
980/* Reinitialise the MAC to pick up new PHY settings, even if the port is
981 * disabled. */
Ben Hutchingsd3245b22009-11-29 03:42:41 +0000982int efx_reconfigure_port(struct efx_nic *efx)
Ben Hutchings8ceee662008-04-27 12:55:59 +0100983{
Ben Hutchingsd3245b22009-11-29 03:42:41 +0000984 int rc;
985
Ben Hutchings8ceee662008-04-27 12:55:59 +0100986 EFX_ASSERT_RESET_SERIALISED(efx);
987
988 mutex_lock(&efx->mac_lock);
Ben Hutchingsd3245b22009-11-29 03:42:41 +0000989 rc = __efx_reconfigure_port(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100990 mutex_unlock(&efx->mac_lock);
Ben Hutchingsd3245b22009-11-29 03:42:41 +0000991
992 return rc;
Ben Hutchings8ceee662008-04-27 12:55:59 +0100993}
994
Ben Hutchings8be4f3e2009-11-25 16:12:16 +0000995/* Asynchronous work item for changing MAC promiscuity and multicast
996 * hash. Avoid a drain/rx_ingress enable by reconfiguring the current
997 * MAC directly. */
Ben Hutchings766ca0f2008-12-12 21:59:24 -0800998static void efx_mac_work(struct work_struct *data)
999{
1000 struct efx_nic *efx = container_of(data, struct efx_nic, mac_work);
1001
1002 mutex_lock(&efx->mac_lock);
Ben Hutchings30b81cd2011-09-13 19:47:48 +01001003 if (efx->port_enabled)
Ben Hutchings710b2082011-09-03 00:15:00 +01001004 efx->type->reconfigure_mac(efx);
Ben Hutchings766ca0f2008-12-12 21:59:24 -08001005 mutex_unlock(&efx->mac_lock);
1006}
1007
Ben Hutchings8ceee662008-04-27 12:55:59 +01001008static int efx_probe_port(struct efx_nic *efx)
1009{
1010 int rc;
1011
Ben Hutchings62776d02010-06-23 11:30:07 +00001012 netif_dbg(efx, probe, efx->net_dev, "create port\n");
Ben Hutchings8ceee662008-04-27 12:55:59 +01001013
Steve Hodgsonff3b00a2009-12-23 13:46:36 +00001014 if (phy_flash_cfg)
1015 efx->phy_mode = PHY_MODE_SPECIAL;
1016
Ben Hutchingsef2b90e2009-11-29 03:42:31 +00001017 /* Connect up MAC/PHY operations table */
1018 rc = efx->type->probe_port(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001019 if (rc)
Ben Hutchingse42de262010-09-10 06:41:19 +00001020 return rc;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001021
Ben Hutchingse332bcb2011-12-20 01:22:51 +00001022 /* Initialise MAC address to permanent address */
Edward Creecd84ff42014-03-07 18:27:41 +00001023 ether_addr_copy(efx->net_dev->dev_addr, efx->net_dev->perm_addr);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001024
1025 return 0;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001026}
1027
1028static int efx_init_port(struct efx_nic *efx)
1029{
1030 int rc;
1031
Ben Hutchings62776d02010-06-23 11:30:07 +00001032 netif_dbg(efx, drv, efx->net_dev, "init port\n");
Ben Hutchings8ceee662008-04-27 12:55:59 +01001033
Ben Hutchings1dfc5ce2009-11-25 16:11:19 +00001034 mutex_lock(&efx->mac_lock);
1035
Ben Hutchings177dfcd2008-12-12 21:50:08 -08001036 rc = efx->phy_op->init(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001037 if (rc)
Ben Hutchings1dfc5ce2009-11-25 16:11:19 +00001038 goto fail1;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001039
Ben Hutchingsdc8cfa52008-09-01 12:46:50 +01001040 efx->port_initialized = true;
Ben Hutchings1dfc5ce2009-11-25 16:11:19 +00001041
Ben Hutchingsd3245b22009-11-29 03:42:41 +00001042 /* Reconfigure the MAC before creating dma queues (required for
1043 * Falcon/A1 where RX_INGR_EN/TX_DRAIN_EN isn't supported) */
Ben Hutchings710b2082011-09-03 00:15:00 +01001044 efx->type->reconfigure_mac(efx);
Ben Hutchingsd3245b22009-11-29 03:42:41 +00001045
1046 /* Ensure the PHY advertises the correct flow control settings */
1047 rc = efx->phy_op->reconfigure(efx);
1048 if (rc)
1049 goto fail2;
1050
Ben Hutchings1dfc5ce2009-11-25 16:11:19 +00001051 mutex_unlock(&efx->mac_lock);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001052 return 0;
Ben Hutchings177dfcd2008-12-12 21:50:08 -08001053
Ben Hutchings1dfc5ce2009-11-25 16:11:19 +00001054fail2:
Ben Hutchings177dfcd2008-12-12 21:50:08 -08001055 efx->phy_op->fini(efx);
Ben Hutchings1dfc5ce2009-11-25 16:11:19 +00001056fail1:
1057 mutex_unlock(&efx->mac_lock);
Ben Hutchings177dfcd2008-12-12 21:50:08 -08001058 return rc;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001059}
1060
Ben Hutchings8ceee662008-04-27 12:55:59 +01001061static void efx_start_port(struct efx_nic *efx)
1062{
Ben Hutchings62776d02010-06-23 11:30:07 +00001063 netif_dbg(efx, ifup, efx->net_dev, "start port\n");
Ben Hutchings8ceee662008-04-27 12:55:59 +01001064 BUG_ON(efx->port_enabled);
1065
1066 mutex_lock(&efx->mac_lock);
Ben Hutchingsdc8cfa52008-09-01 12:46:50 +01001067 efx->port_enabled = true;
Ben Hutchings8be4f3e2009-11-25 16:12:16 +00001068
Ben Hutchingsd615c032013-10-08 17:33:20 +01001069 /* Ensure MAC ingress/egress is enabled */
Ben Hutchings710b2082011-09-03 00:15:00 +01001070 efx->type->reconfigure_mac(efx);
Ben Hutchings8be4f3e2009-11-25 16:12:16 +00001071
Ben Hutchings8ceee662008-04-27 12:55:59 +01001072 mutex_unlock(&efx->mac_lock);
1073}
1074
Ben Hutchingsd615c032013-10-08 17:33:20 +01001075/* Cancel work for MAC reconfiguration, periodic hardware monitoring
1076 * and the async self-test, wait for them to finish and prevent them
1077 * being scheduled again. This doesn't cover online resets, which
1078 * should only be cancelled when removing the device.
1079 */
Ben Hutchings8ceee662008-04-27 12:55:59 +01001080static void efx_stop_port(struct efx_nic *efx)
1081{
Ben Hutchings62776d02010-06-23 11:30:07 +00001082 netif_dbg(efx, ifdown, efx->net_dev, "stop port\n");
Ben Hutchings8ceee662008-04-27 12:55:59 +01001083
Ben Hutchingsd615c032013-10-08 17:33:20 +01001084 EFX_ASSERT_RESET_SERIALISED(efx);
1085
Ben Hutchings8ceee662008-04-27 12:55:59 +01001086 mutex_lock(&efx->mac_lock);
Ben Hutchingsdc8cfa52008-09-01 12:46:50 +01001087 efx->port_enabled = false;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001088 mutex_unlock(&efx->mac_lock);
1089
1090 /* Serialise against efx_set_multicast_list() */
Ben Hutchings73ba7b62012-01-09 19:47:08 +00001091 netif_addr_lock_bh(efx->net_dev);
1092 netif_addr_unlock_bh(efx->net_dev);
Ben Hutchingsd615c032013-10-08 17:33:20 +01001093
1094 cancel_delayed_work_sync(&efx->monitor_work);
1095 efx_selftest_async_cancel(efx);
1096 cancel_work_sync(&efx->mac_work);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001097}
1098
1099static void efx_fini_port(struct efx_nic *efx)
1100{
Ben Hutchings62776d02010-06-23 11:30:07 +00001101 netif_dbg(efx, drv, efx->net_dev, "shut down port\n");
Ben Hutchings8ceee662008-04-27 12:55:59 +01001102
1103 if (!efx->port_initialized)
1104 return;
1105
Ben Hutchings177dfcd2008-12-12 21:50:08 -08001106 efx->phy_op->fini(efx);
Ben Hutchingsdc8cfa52008-09-01 12:46:50 +01001107 efx->port_initialized = false;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001108
Ben Hutchingseb50c0d2009-11-23 16:06:30 +00001109 efx->link_state.up = false;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001110 efx_link_status_changed(efx);
1111}
1112
1113static void efx_remove_port(struct efx_nic *efx)
1114{
Ben Hutchings62776d02010-06-23 11:30:07 +00001115 netif_dbg(efx, drv, efx->net_dev, "destroying port\n");
Ben Hutchings8ceee662008-04-27 12:55:59 +01001116
Ben Hutchingsef2b90e2009-11-29 03:42:31 +00001117 efx->type->remove_port(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001118}
1119
1120/**************************************************************************
1121 *
1122 * NIC handling
1123 *
1124 **************************************************************************/
1125
Ben Hutchings0bcf4a62013-10-18 19:21:45 +01001126static LIST_HEAD(efx_primary_list);
1127static LIST_HEAD(efx_unassociated_list);
1128
1129static bool efx_same_controller(struct efx_nic *left, struct efx_nic *right)
1130{
1131 return left->type == right->type &&
1132 left->vpd_sn && right->vpd_sn &&
1133 !strcmp(left->vpd_sn, right->vpd_sn);
1134}
1135
1136static void efx_associate(struct efx_nic *efx)
1137{
1138 struct efx_nic *other, *next;
1139
1140 if (efx->primary == efx) {
1141 /* Adding primary function; look for secondaries */
1142
1143 netif_dbg(efx, probe, efx->net_dev, "adding to primary list\n");
1144 list_add_tail(&efx->node, &efx_primary_list);
1145
1146 list_for_each_entry_safe(other, next, &efx_unassociated_list,
1147 node) {
1148 if (efx_same_controller(efx, other)) {
1149 list_del(&other->node);
1150 netif_dbg(other, probe, other->net_dev,
1151 "moving to secondary list of %s %s\n",
1152 pci_name(efx->pci_dev),
1153 efx->net_dev->name);
1154 list_add_tail(&other->node,
1155 &efx->secondary_list);
1156 other->primary = efx;
1157 }
1158 }
1159 } else {
1160 /* Adding secondary function; look for primary */
1161
1162 list_for_each_entry(other, &efx_primary_list, node) {
1163 if (efx_same_controller(efx, other)) {
1164 netif_dbg(efx, probe, efx->net_dev,
1165 "adding to secondary list of %s %s\n",
1166 pci_name(other->pci_dev),
1167 other->net_dev->name);
1168 list_add_tail(&efx->node,
1169 &other->secondary_list);
1170 efx->primary = other;
1171 return;
1172 }
1173 }
1174
1175 netif_dbg(efx, probe, efx->net_dev,
1176 "adding to unassociated list\n");
1177 list_add_tail(&efx->node, &efx_unassociated_list);
1178 }
1179}
1180
1181static void efx_dissociate(struct efx_nic *efx)
1182{
1183 struct efx_nic *other, *next;
1184
1185 list_del(&efx->node);
1186 efx->primary = NULL;
1187
1188 list_for_each_entry_safe(other, next, &efx->secondary_list, node) {
1189 list_del(&other->node);
1190 netif_dbg(other, probe, other->net_dev,
1191 "moving to unassociated list\n");
1192 list_add_tail(&other->node, &efx_unassociated_list);
1193 other->primary = NULL;
1194 }
1195}
1196
Ben Hutchings8ceee662008-04-27 12:55:59 +01001197/* This configures the PCI device to enable I/O and DMA. */
1198static int efx_init_io(struct efx_nic *efx)
1199{
1200 struct pci_dev *pci_dev = efx->pci_dev;
1201 dma_addr_t dma_mask = efx->type->max_dma_mask;
Ben Hutchingsb1057982012-09-19 00:56:47 +01001202 unsigned int mem_map_size = efx->type->mem_map_size(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001203 int rc;
1204
Ben Hutchings62776d02010-06-23 11:30:07 +00001205 netif_dbg(efx, probe, efx->net_dev, "initialising I/O\n");
Ben Hutchings8ceee662008-04-27 12:55:59 +01001206
1207 rc = pci_enable_device(pci_dev);
1208 if (rc) {
Ben Hutchings62776d02010-06-23 11:30:07 +00001209 netif_err(efx, probe, efx->net_dev,
1210 "failed to enable PCI device\n");
Ben Hutchings8ceee662008-04-27 12:55:59 +01001211 goto fail1;
1212 }
1213
1214 pci_set_master(pci_dev);
1215
1216 /* Set the PCI DMA mask. Try all possibilities from our
1217 * genuine mask down to 32 bits, because some architectures
1218 * (e.g. x86_64 with iommu_sac_force set) will allow 40 bit
1219 * masks event though they reject 46 bit masks.
1220 */
1221 while (dma_mask > 0x7fffffffUL) {
Ben Hutchings0e33d872012-05-17 17:46:55 +01001222 if (dma_supported(&pci_dev->dev, dma_mask)) {
Russell King9663ded2013-06-26 23:49:11 +01001223 rc = dma_set_mask_and_coherent(&pci_dev->dev, dma_mask);
Ben Hutchingse9e01842012-01-05 18:50:29 +00001224 if (rc == 0)
1225 break;
1226 }
Ben Hutchings8ceee662008-04-27 12:55:59 +01001227 dma_mask >>= 1;
1228 }
1229 if (rc) {
Ben Hutchings62776d02010-06-23 11:30:07 +00001230 netif_err(efx, probe, efx->net_dev,
1231 "could not find a suitable DMA mask\n");
Ben Hutchings8ceee662008-04-27 12:55:59 +01001232 goto fail2;
1233 }
Ben Hutchings62776d02010-06-23 11:30:07 +00001234 netif_dbg(efx, probe, efx->net_dev,
1235 "using DMA mask %llx\n", (unsigned long long) dma_mask);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001236
Ben Hutchingsdc803df2009-10-23 08:32:33 +00001237 efx->membase_phys = pci_resource_start(efx->pci_dev, EFX_MEM_BAR);
1238 rc = pci_request_region(pci_dev, EFX_MEM_BAR, "sfc");
Ben Hutchings8ceee662008-04-27 12:55:59 +01001239 if (rc) {
Ben Hutchings62776d02010-06-23 11:30:07 +00001240 netif_err(efx, probe, efx->net_dev,
1241 "request for memory BAR failed\n");
Ben Hutchings8ceee662008-04-27 12:55:59 +01001242 rc = -EIO;
1243 goto fail3;
1244 }
Ben Hutchingsb1057982012-09-19 00:56:47 +01001245 efx->membase = ioremap_nocache(efx->membase_phys, mem_map_size);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001246 if (!efx->membase) {
Ben Hutchings62776d02010-06-23 11:30:07 +00001247 netif_err(efx, probe, efx->net_dev,
1248 "could not map memory BAR at %llx+%x\n",
Ben Hutchingsb1057982012-09-19 00:56:47 +01001249 (unsigned long long)efx->membase_phys, mem_map_size);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001250 rc = -ENOMEM;
1251 goto fail4;
1252 }
Ben Hutchings62776d02010-06-23 11:30:07 +00001253 netif_dbg(efx, probe, efx->net_dev,
1254 "memory BAR at %llx+%x (virtual %p)\n",
Ben Hutchingsb1057982012-09-19 00:56:47 +01001255 (unsigned long long)efx->membase_phys, mem_map_size,
1256 efx->membase);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001257
1258 return 0;
1259
1260 fail4:
Ben Hutchingsdc803df2009-10-23 08:32:33 +00001261 pci_release_region(efx->pci_dev, EFX_MEM_BAR);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001262 fail3:
Ben Hutchings2c118e02008-05-16 21:15:29 +01001263 efx->membase_phys = 0;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001264 fail2:
1265 pci_disable_device(efx->pci_dev);
1266 fail1:
1267 return rc;
1268}
1269
1270static void efx_fini_io(struct efx_nic *efx)
1271{
Ben Hutchings62776d02010-06-23 11:30:07 +00001272 netif_dbg(efx, drv, efx->net_dev, "shutting down I/O\n");
Ben Hutchings8ceee662008-04-27 12:55:59 +01001273
1274 if (efx->membase) {
1275 iounmap(efx->membase);
1276 efx->membase = NULL;
1277 }
1278
1279 if (efx->membase_phys) {
Ben Hutchingsdc803df2009-10-23 08:32:33 +00001280 pci_release_region(efx->pci_dev, EFX_MEM_BAR);
Ben Hutchings2c118e02008-05-16 21:15:29 +01001281 efx->membase_phys = 0;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001282 }
1283
1284 pci_disable_device(efx->pci_dev);
1285}
1286
Ben Hutchingsa9a525062012-02-14 20:15:57 +00001287static unsigned int efx_wanted_parallelism(struct efx_nic *efx)
Ben Hutchings46123d02008-09-01 12:47:33 +01001288{
Ben Hutchingscdb08f82011-12-20 01:08:05 +00001289 cpumask_var_t thread_mask;
Ben Hutchingsa16e5b22012-02-14 00:40:12 +00001290 unsigned int count;
Ben Hutchings46123d02008-09-01 12:47:33 +01001291 int cpu;
1292
Ben Hutchingscd2d5b52012-02-14 00:48:07 +00001293 if (rss_cpus) {
1294 count = rss_cpus;
1295 } else {
1296 if (unlikely(!zalloc_cpumask_var(&thread_mask, GFP_KERNEL))) {
1297 netif_warn(efx, probe, efx->net_dev,
1298 "RSS disabled due to allocation failure\n");
1299 return 1;
Ben Hutchings46123d02008-09-01 12:47:33 +01001300 }
Ben Hutchingscd2d5b52012-02-14 00:48:07 +00001301
1302 count = 0;
1303 for_each_online_cpu(cpu) {
1304 if (!cpumask_test_cpu(cpu, thread_mask)) {
1305 ++count;
1306 cpumask_or(thread_mask, thread_mask,
1307 topology_thread_cpumask(cpu));
1308 }
1309 }
1310
1311 free_cpumask_var(thread_mask);
Ben Hutchings46123d02008-09-01 12:47:33 +01001312 }
1313
Ben Hutchingscd2d5b52012-02-14 00:48:07 +00001314 /* If RSS is requested for the PF *and* VFs then we can't write RSS
1315 * table entries that are inaccessible to VFs
1316 */
Shradha Shahd98a4ff2014-11-05 12:16:46 +00001317 if (efx->type->sriov_wanted(efx) && efx_vf_size(efx) > 1 &&
Ben Hutchingscd2d5b52012-02-14 00:48:07 +00001318 count > efx_vf_size(efx)) {
1319 netif_warn(efx, probe, efx->net_dev,
1320 "Reducing number of RSS channels from %u to %u for "
1321 "VF support. Increase vf-msix-limit to use more "
1322 "channels on the PF.\n",
1323 count, efx_vf_size(efx));
1324 count = efx_vf_size(efx);
1325 }
1326
Ben Hutchings46123d02008-09-01 12:47:33 +01001327 return count;
1328}
1329
1330/* Probe the number and type of interrupts we are able to obtain, and
1331 * the resulting numbers of channels and RX queues.
1332 */
Ben Hutchings64d8ad62011-01-05 00:50:41 +00001333static int efx_probe_interrupts(struct efx_nic *efx)
Ben Hutchings8ceee662008-04-27 12:55:59 +01001334{
Ben Hutchings7f967c02012-02-13 23:45:02 +00001335 unsigned int extra_channels = 0;
1336 unsigned int i, j;
Ben Hutchingsa16e5b22012-02-14 00:40:12 +00001337 int rc;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001338
Ben Hutchings7f967c02012-02-13 23:45:02 +00001339 for (i = 0; i < EFX_MAX_EXTRA_CHANNELS; i++)
1340 if (efx->extra_channel_type[i])
1341 ++extra_channels;
1342
Ben Hutchings8ceee662008-04-27 12:55:59 +01001343 if (efx->interrupt_mode == EFX_INT_MODE_MSIX) {
Ben Hutchings46123d02008-09-01 12:47:33 +01001344 struct msix_entry xentries[EFX_MAX_CHANNELS];
Ben Hutchingsa16e5b22012-02-14 00:40:12 +00001345 unsigned int n_channels;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001346
Ben Hutchingsa9a525062012-02-14 20:15:57 +00001347 n_channels = efx_wanted_parallelism(efx);
Ben Hutchingsa4900ac2010-04-28 09:30:43 +00001348 if (separate_tx_channels)
1349 n_channels *= 2;
Ben Hutchings7f967c02012-02-13 23:45:02 +00001350 n_channels += extra_channels;
Ben Hutchingsb1057982012-09-19 00:56:47 +01001351 n_channels = min(n_channels, efx->max_channels);
Ben Hutchingsaa6ef272008-07-18 19:03:10 +01001352
Ben Hutchingsa4900ac2010-04-28 09:30:43 +00001353 for (i = 0; i < n_channels; i++)
Ben Hutchings8ceee662008-04-27 12:55:59 +01001354 xentries[i].entry = i;
Alexander Gordeev184603d2014-02-18 11:12:00 +01001355 rc = pci_enable_msix_range(efx->pci_dev,
1356 xentries, 1, n_channels);
1357 if (rc < 0) {
1358 /* Fall back to single channel MSI */
1359 efx->interrupt_mode = EFX_INT_MODE_MSI;
1360 netif_err(efx, drv, efx->net_dev,
1361 "could not enable MSI-X\n");
1362 } else if (rc < n_channels) {
Ben Hutchings62776d02010-06-23 11:30:07 +00001363 netif_err(efx, drv, efx->net_dev,
1364 "WARNING: Insufficient MSI-X vectors"
Ben Hutchingsa16e5b22012-02-14 00:40:12 +00001365 " available (%d < %u).\n", rc, n_channels);
Ben Hutchings62776d02010-06-23 11:30:07 +00001366 netif_err(efx, drv, efx->net_dev,
1367 "WARNING: Performance may be reduced.\n");
Ben Hutchingsa4900ac2010-04-28 09:30:43 +00001368 n_channels = rc;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001369 }
1370
Alexander Gordeev184603d2014-02-18 11:12:00 +01001371 if (rc > 0) {
Ben Hutchingsa4900ac2010-04-28 09:30:43 +00001372 efx->n_channels = n_channels;
Ben Hutchings7f967c02012-02-13 23:45:02 +00001373 if (n_channels > extra_channels)
1374 n_channels -= extra_channels;
Ben Hutchingsa4900ac2010-04-28 09:30:43 +00001375 if (separate_tx_channels) {
Ben Hutchings7f967c02012-02-13 23:45:02 +00001376 efx->n_tx_channels = max(n_channels / 2, 1U);
1377 efx->n_rx_channels = max(n_channels -
1378 efx->n_tx_channels,
1379 1U);
Ben Hutchingsa4900ac2010-04-28 09:30:43 +00001380 } else {
Ben Hutchings7f967c02012-02-13 23:45:02 +00001381 efx->n_tx_channels = n_channels;
1382 efx->n_rx_channels = n_channels;
Ben Hutchingsa4900ac2010-04-28 09:30:43 +00001383 }
Ben Hutchings7f967c02012-02-13 23:45:02 +00001384 for (i = 0; i < efx->n_channels; i++)
Ben Hutchingsf7d12cd2010-09-10 06:41:47 +00001385 efx_get_channel(efx, i)->irq =
1386 xentries[i].vector;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001387 }
1388 }
1389
1390 /* Try single interrupt MSI */
1391 if (efx->interrupt_mode == EFX_INT_MODE_MSI) {
Neil Turton28b581a2008-12-12 21:41:06 -08001392 efx->n_channels = 1;
Ben Hutchingsa4900ac2010-04-28 09:30:43 +00001393 efx->n_rx_channels = 1;
1394 efx->n_tx_channels = 1;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001395 rc = pci_enable_msi(efx->pci_dev);
1396 if (rc == 0) {
Ben Hutchingsf7d12cd2010-09-10 06:41:47 +00001397 efx_get_channel(efx, 0)->irq = efx->pci_dev->irq;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001398 } else {
Ben Hutchings62776d02010-06-23 11:30:07 +00001399 netif_err(efx, drv, efx->net_dev,
1400 "could not enable MSI\n");
Ben Hutchings8ceee662008-04-27 12:55:59 +01001401 efx->interrupt_mode = EFX_INT_MODE_LEGACY;
1402 }
1403 }
1404
1405 /* Assume legacy interrupts */
1406 if (efx->interrupt_mode == EFX_INT_MODE_LEGACY) {
Neil Turton28b581a2008-12-12 21:41:06 -08001407 efx->n_channels = 1 + (separate_tx_channels ? 1 : 0);
Ben Hutchingsa4900ac2010-04-28 09:30:43 +00001408 efx->n_rx_channels = 1;
1409 efx->n_tx_channels = 1;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001410 efx->legacy_irq = efx->pci_dev->irq;
1411 }
Ben Hutchings64d8ad62011-01-05 00:50:41 +00001412
Ben Hutchings7f967c02012-02-13 23:45:02 +00001413 /* Assign extra channels if possible */
1414 j = efx->n_channels;
1415 for (i = 0; i < EFX_MAX_EXTRA_CHANNELS; i++) {
1416 if (!efx->extra_channel_type[i])
1417 continue;
1418 if (efx->interrupt_mode != EFX_INT_MODE_MSIX ||
1419 efx->n_channels <= extra_channels) {
1420 efx->extra_channel_type[i]->handle_no_channel(efx);
1421 } else {
1422 --j;
1423 efx_get_channel(efx, j)->type =
1424 efx->extra_channel_type[i];
1425 }
1426 }
1427
Ben Hutchingscd2d5b52012-02-14 00:48:07 +00001428 /* RSS might be usable on VFs even if it is disabled on the PF */
Shradha Shahd98a4ff2014-11-05 12:16:46 +00001429
Shradha Shah327c6852014-11-05 12:16:32 +00001430 efx->rss_spread = ((efx->n_rx_channels > 1 ||
Shradha Shahd98a4ff2014-11-05 12:16:46 +00001431 !efx->type->sriov_wanted(efx)) ?
Ben Hutchingscd2d5b52012-02-14 00:48:07 +00001432 efx->n_rx_channels : efx_vf_size(efx));
1433
Ben Hutchings64d8ad62011-01-05 00:50:41 +00001434 return 0;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001435}
1436
Jon Cooper261e4d92013-04-15 18:51:54 +01001437static int efx_soft_enable_interrupts(struct efx_nic *efx)
Ben Hutchingsd8291182012-10-05 23:35:41 +01001438{
Jon Cooper261e4d92013-04-15 18:51:54 +01001439 struct efx_channel *channel, *end_channel;
1440 int rc;
Ben Hutchingsd8291182012-10-05 23:35:41 +01001441
1442 BUG_ON(efx->state == STATE_DISABLED);
1443
1444 efx->irq_soft_enabled = true;
1445 smp_wmb();
1446
1447 efx_for_each_channel(channel, efx) {
Jon Cooper261e4d92013-04-15 18:51:54 +01001448 if (!channel->type->keep_eventq) {
1449 rc = efx_init_eventq(channel);
1450 if (rc)
1451 goto fail;
1452 }
Ben Hutchingsd8291182012-10-05 23:35:41 +01001453 efx_start_eventq(channel);
1454 }
1455
1456 efx_mcdi_mode_event(efx);
Jon Cooper261e4d92013-04-15 18:51:54 +01001457
1458 return 0;
1459fail:
1460 end_channel = channel;
1461 efx_for_each_channel(channel, efx) {
1462 if (channel == end_channel)
1463 break;
1464 efx_stop_eventq(channel);
1465 if (!channel->type->keep_eventq)
1466 efx_fini_eventq(channel);
1467 }
1468
1469 return rc;
Ben Hutchingsd8291182012-10-05 23:35:41 +01001470}
1471
1472static void efx_soft_disable_interrupts(struct efx_nic *efx)
1473{
1474 struct efx_channel *channel;
1475
1476 if (efx->state == STATE_DISABLED)
1477 return;
1478
1479 efx_mcdi_mode_poll(efx);
1480
1481 efx->irq_soft_enabled = false;
1482 smp_wmb();
1483
1484 if (efx->legacy_irq)
1485 synchronize_irq(efx->legacy_irq);
1486
1487 efx_for_each_channel(channel, efx) {
1488 if (channel->irq)
1489 synchronize_irq(channel->irq);
1490
1491 efx_stop_eventq(channel);
1492 if (!channel->type->keep_eventq)
1493 efx_fini_eventq(channel);
1494 }
Ben Hutchingscade7152013-08-27 23:12:31 +01001495
1496 /* Flush the asynchronous MCDI request queue */
1497 efx_mcdi_flush_async(efx);
Ben Hutchingsd8291182012-10-05 23:35:41 +01001498}
1499
Jon Cooper261e4d92013-04-15 18:51:54 +01001500static int efx_enable_interrupts(struct efx_nic *efx)
Ben Hutchings9f2cb712012-02-08 00:11:20 +00001501{
Jon Cooper261e4d92013-04-15 18:51:54 +01001502 struct efx_channel *channel, *end_channel;
1503 int rc;
Ben Hutchings9f2cb712012-02-08 00:11:20 +00001504
Ben Hutchings8b7325b2012-07-27 20:46:41 +01001505 BUG_ON(efx->state == STATE_DISABLED);
1506
Alexandre Ramesb28405b2013-03-21 16:41:43 +00001507 if (efx->eeh_disabled_legacy_irq) {
1508 enable_irq(efx->legacy_irq);
1509 efx->eeh_disabled_legacy_irq = false;
1510 }
Ben Hutchingsd8291182012-10-05 23:35:41 +01001511
Ben Hutchings86094f72013-08-21 19:51:04 +01001512 efx->type->irq_enable_master(efx);
Ben Hutchings9f2cb712012-02-08 00:11:20 +00001513
1514 efx_for_each_channel(channel, efx) {
Jon Cooper261e4d92013-04-15 18:51:54 +01001515 if (channel->type->keep_eventq) {
1516 rc = efx_init_eventq(channel);
1517 if (rc)
1518 goto fail;
1519 }
Ben Hutchings9f2cb712012-02-08 00:11:20 +00001520 }
1521
Jon Cooper261e4d92013-04-15 18:51:54 +01001522 rc = efx_soft_enable_interrupts(efx);
1523 if (rc)
1524 goto fail;
1525
1526 return 0;
1527
1528fail:
1529 end_channel = channel;
1530 efx_for_each_channel(channel, efx) {
1531 if (channel == end_channel)
1532 break;
1533 if (channel->type->keep_eventq)
1534 efx_fini_eventq(channel);
1535 }
1536
1537 efx->type->irq_disable_non_ev(efx);
1538
1539 return rc;
Ben Hutchings9f2cb712012-02-08 00:11:20 +00001540}
1541
Ben Hutchingsd8291182012-10-05 23:35:41 +01001542static void efx_disable_interrupts(struct efx_nic *efx)
Ben Hutchings9f2cb712012-02-08 00:11:20 +00001543{
1544 struct efx_channel *channel;
1545
Ben Hutchingsd8291182012-10-05 23:35:41 +01001546 efx_soft_disable_interrupts(efx);
Ben Hutchings9f2cb712012-02-08 00:11:20 +00001547
1548 efx_for_each_channel(channel, efx) {
Ben Hutchingsd8291182012-10-05 23:35:41 +01001549 if (channel->type->keep_eventq)
Ben Hutchings7f967c02012-02-13 23:45:02 +00001550 efx_fini_eventq(channel);
Ben Hutchings9f2cb712012-02-08 00:11:20 +00001551 }
Ben Hutchingsd8291182012-10-05 23:35:41 +01001552
Ben Hutchings86094f72013-08-21 19:51:04 +01001553 efx->type->irq_disable_non_ev(efx);
Ben Hutchings9f2cb712012-02-08 00:11:20 +00001554}
1555
Ben Hutchings8ceee662008-04-27 12:55:59 +01001556static void efx_remove_interrupts(struct efx_nic *efx)
1557{
1558 struct efx_channel *channel;
1559
1560 /* Remove MSI/MSI-X interrupts */
Ben Hutchings64ee3122008-09-01 12:47:38 +01001561 efx_for_each_channel(channel, efx)
Ben Hutchings8ceee662008-04-27 12:55:59 +01001562 channel->irq = 0;
1563 pci_disable_msi(efx->pci_dev);
1564 pci_disable_msix(efx->pci_dev);
1565
1566 /* Remove legacy interrupt */
1567 efx->legacy_irq = 0;
1568}
1569
Ben Hutchings8831da72008-09-01 12:47:48 +01001570static void efx_set_channels(struct efx_nic *efx)
Ben Hutchings8ceee662008-04-27 12:55:59 +01001571{
Ben Hutchings602a5322011-05-16 17:32:39 +01001572 struct efx_channel *channel;
1573 struct efx_tx_queue *tx_queue;
1574
Ben Hutchings97653432011-01-12 18:26:56 +00001575 efx->tx_channel_offset =
Ben Hutchingsa4900ac2010-04-28 09:30:43 +00001576 separate_tx_channels ? efx->n_channels - efx->n_tx_channels : 0;
Ben Hutchings602a5322011-05-16 17:32:39 +01001577
Stuart Hodgson79d68b32012-07-16 17:08:33 +01001578 /* We need to mark which channels really have RX and TX
1579 * queues, and adjust the TX queue numbers if we have separate
Ben Hutchings602a5322011-05-16 17:32:39 +01001580 * RX-only and TX-only channels.
1581 */
1582 efx_for_each_channel(channel, efx) {
Stuart Hodgson79d68b32012-07-16 17:08:33 +01001583 if (channel->channel < efx->n_rx_channels)
1584 channel->rx_queue.core_index = channel->channel;
1585 else
1586 channel->rx_queue.core_index = -1;
1587
Ben Hutchings602a5322011-05-16 17:32:39 +01001588 efx_for_each_channel_tx_queue(tx_queue, channel)
1589 tx_queue->queue -= (efx->tx_channel_offset *
1590 EFX_TXQ_TYPES);
1591 }
Ben Hutchings8ceee662008-04-27 12:55:59 +01001592}
1593
1594static int efx_probe_nic(struct efx_nic *efx)
1595{
Ben Hutchings765c9f42010-06-30 05:06:28 +00001596 size_t i;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001597 int rc;
1598
Ben Hutchings62776d02010-06-23 11:30:07 +00001599 netif_dbg(efx, probe, efx->net_dev, "creating NIC\n");
Ben Hutchings8ceee662008-04-27 12:55:59 +01001600
1601 /* Carry out hardware-type specific initialisation */
Ben Hutchingsef2b90e2009-11-29 03:42:31 +00001602 rc = efx->type->probe(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001603 if (rc)
1604 return rc;
1605
Ben Hutchingsa4900ac2010-04-28 09:30:43 +00001606 /* Determine the number of channels and queues by trying to hook
Ben Hutchings8ceee662008-04-27 12:55:59 +01001607 * in MSI-X interrupts. */
Ben Hutchings64d8ad62011-01-05 00:50:41 +00001608 rc = efx_probe_interrupts(efx);
1609 if (rc)
Ben Hutchingsc15eed22013-08-29 00:45:48 +01001610 goto fail1;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001611
Daniel Pieczko52ad7622014-04-01 13:10:34 +01001612 efx_set_channels(efx);
1613
Ben Hutchingsc15eed22013-08-29 00:45:48 +01001614 rc = efx->type->dimension_resources(efx);
1615 if (rc)
1616 goto fail2;
Ben Hutchings28e47c42012-02-15 01:58:49 +00001617
Ben Hutchings5d3a6fc2010-06-25 07:05:43 +00001618 if (efx->n_channels > 1)
Eric Dumazet7a20db32014-11-16 06:23:17 -08001619 netdev_rss_key_fill(&efx->rx_hash_key, sizeof(efx->rx_hash_key));
Ben Hutchings765c9f42010-06-30 05:06:28 +00001620 for (i = 0; i < ARRAY_SIZE(efx->rx_indir_table); i++)
Ben Hutchings278bc422011-12-15 13:56:49 +00001621 efx->rx_indir_table[i] =
Ben Hutchingscd2d5b52012-02-14 00:48:07 +00001622 ethtool_rxfh_indir_default(i, efx->rss_spread);
Ben Hutchings5d3a6fc2010-06-25 07:05:43 +00001623
Ben Hutchingsc4f4adc2010-09-27 08:31:07 +00001624 netif_set_real_num_tx_queues(efx->net_dev, efx->n_tx_channels);
1625 netif_set_real_num_rx_queues(efx->net_dev, efx->n_rx_channels);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001626
1627 /* Initialise the interrupt moderation settings */
Ben Hutchings9e393b32011-09-05 07:43:04 +00001628 efx_init_irq_moderation(efx, tx_irq_mod_usec, rx_irq_mod_usec, true,
1629 true);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001630
1631 return 0;
Ben Hutchings64d8ad62011-01-05 00:50:41 +00001632
Ben Hutchingsc15eed22013-08-29 00:45:48 +01001633fail2:
1634 efx_remove_interrupts(efx);
1635fail1:
Ben Hutchings64d8ad62011-01-05 00:50:41 +00001636 efx->type->remove(efx);
1637 return rc;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001638}
1639
1640static void efx_remove_nic(struct efx_nic *efx)
1641{
Ben Hutchings62776d02010-06-23 11:30:07 +00001642 netif_dbg(efx, drv, efx->net_dev, "destroying NIC\n");
Ben Hutchings8ceee662008-04-27 12:55:59 +01001643
1644 efx_remove_interrupts(efx);
Ben Hutchingsef2b90e2009-11-29 03:42:31 +00001645 efx->type->remove(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001646}
1647
Ben Hutchingsadd72472012-11-08 01:46:53 +00001648static int efx_probe_filters(struct efx_nic *efx)
1649{
1650 int rc;
1651
1652 spin_lock_init(&efx->filter_lock);
1653
1654 rc = efx->type->filter_table_probe(efx);
1655 if (rc)
1656 return rc;
1657
1658#ifdef CONFIG_RFS_ACCEL
1659 if (efx->type->offload_features & NETIF_F_NTUPLE) {
1660 efx->rps_flow_id = kcalloc(efx->type->max_rx_ip_filters,
1661 sizeof(*efx->rps_flow_id),
1662 GFP_KERNEL);
1663 if (!efx->rps_flow_id) {
1664 efx->type->filter_table_remove(efx);
1665 return -ENOMEM;
1666 }
1667 }
1668#endif
1669
1670 return 0;
1671}
1672
1673static void efx_remove_filters(struct efx_nic *efx)
1674{
1675#ifdef CONFIG_RFS_ACCEL
1676 kfree(efx->rps_flow_id);
1677#endif
1678 efx->type->filter_table_remove(efx);
1679}
1680
1681static void efx_restore_filters(struct efx_nic *efx)
1682{
1683 efx->type->filter_table_restore(efx);
1684}
1685
Ben Hutchings8ceee662008-04-27 12:55:59 +01001686/**************************************************************************
1687 *
1688 * NIC startup/shutdown
1689 *
1690 *************************************************************************/
1691
1692static int efx_probe_all(struct efx_nic *efx)
1693{
Ben Hutchings8ceee662008-04-27 12:55:59 +01001694 int rc;
1695
Ben Hutchings8ceee662008-04-27 12:55:59 +01001696 rc = efx_probe_nic(efx);
1697 if (rc) {
Ben Hutchings62776d02010-06-23 11:30:07 +00001698 netif_err(efx, probe, efx->net_dev, "failed to create NIC\n");
Ben Hutchings8ceee662008-04-27 12:55:59 +01001699 goto fail1;
1700 }
1701
Ben Hutchings8ceee662008-04-27 12:55:59 +01001702 rc = efx_probe_port(efx);
1703 if (rc) {
Ben Hutchings62776d02010-06-23 11:30:07 +00001704 netif_err(efx, probe, efx->net_dev, "failed to create port\n");
Ben Hutchings8ceee662008-04-27 12:55:59 +01001705 goto fail2;
1706 }
1707
Ben Hutchings7e6d06f2012-07-30 15:57:44 +00001708 BUILD_BUG_ON(EFX_DEFAULT_DMAQ_SIZE < EFX_RXQ_MIN_ENT);
1709 if (WARN_ON(EFX_DEFAULT_DMAQ_SIZE < EFX_TXQ_MIN_ENT(efx))) {
1710 rc = -EINVAL;
1711 goto fail3;
1712 }
Steve Hodgsonecc910f2010-09-10 06:42:22 +00001713 efx->rxq_entries = efx->txq_entries = EFX_DEFAULT_DMAQ_SIZE;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001714
Ben Hutchings64eebcf2010-09-20 08:43:07 +00001715 rc = efx_probe_filters(efx);
1716 if (rc) {
1717 netif_err(efx, probe, efx->net_dev,
1718 "failed to create filter tables\n");
Ben Hutchings7f967c02012-02-13 23:45:02 +00001719 goto fail3;
Ben Hutchings64eebcf2010-09-20 08:43:07 +00001720 }
1721
Ben Hutchings7f967c02012-02-13 23:45:02 +00001722 rc = efx_probe_channels(efx);
1723 if (rc)
1724 goto fail4;
1725
Ben Hutchings8ceee662008-04-27 12:55:59 +01001726 return 0;
1727
Ben Hutchings64eebcf2010-09-20 08:43:07 +00001728 fail4:
Ben Hutchings7f967c02012-02-13 23:45:02 +00001729 efx_remove_filters(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001730 fail3:
Ben Hutchings8ceee662008-04-27 12:55:59 +01001731 efx_remove_port(efx);
1732 fail2:
1733 efx_remove_nic(efx);
1734 fail1:
1735 return rc;
1736}
1737
Ben Hutchings8b7325b2012-07-27 20:46:41 +01001738/* If the interface is supposed to be running but is not, start
1739 * the hardware and software data path, regular activity for the port
1740 * (MAC statistics, link polling, etc.) and schedule the port to be
1741 * reconfigured. Interrupts must already be enabled. This function
1742 * is safe to call multiple times, so long as the NIC is not disabled.
1743 * Requires the RTNL lock.
Ben Hutchings9f2cb712012-02-08 00:11:20 +00001744 */
Ben Hutchings8ceee662008-04-27 12:55:59 +01001745static void efx_start_all(struct efx_nic *efx)
1746{
Ben Hutchings8ceee662008-04-27 12:55:59 +01001747 EFX_ASSERT_RESET_SERIALISED(efx);
Ben Hutchings8b7325b2012-07-27 20:46:41 +01001748 BUG_ON(efx->state == STATE_DISABLED);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001749
1750 /* Check that it is appropriate to restart the interface. All
1751 * of these flags are safe to read under just the rtnl lock */
Edward Creee2835462014-04-16 19:27:48 +01001752 if (efx->port_enabled || !netif_running(efx->net_dev) ||
1753 efx->reset_pending)
Ben Hutchings8ceee662008-04-27 12:55:59 +01001754 return;
1755
Ben Hutchings8ceee662008-04-27 12:55:59 +01001756 efx_start_port(efx);
Ben Hutchings9f2cb712012-02-08 00:11:20 +00001757 efx_start_datapath(efx);
Ben Hutchings8880f4e2009-11-29 15:15:41 +00001758
Alexandre Rames626950d2013-01-14 17:20:22 +00001759 /* Start the hardware monitor if there is one */
1760 if (efx->type->monitor != NULL)
Ben Hutchings8ceee662008-04-27 12:55:59 +01001761 queue_delayed_work(efx->workqueue, &efx->monitor_work,
1762 efx_monitor_interval);
Alexandre Rames626950d2013-01-14 17:20:22 +00001763
1764 /* If link state detection is normally event-driven, we have
1765 * to poll now because we could have missed a change
1766 */
1767 if (efx_nic_rev(efx) >= EFX_REV_SIENA_A0) {
Steve Hodgson78c1f0a2009-11-29 03:43:00 +00001768 mutex_lock(&efx->mac_lock);
1769 if (efx->phy_op->poll(efx))
1770 efx_link_status_changed(efx);
1771 mutex_unlock(&efx->mac_lock);
1772 }
Ben Hutchings55edc6e2009-11-25 16:11:35 +00001773
Ben Hutchingsef2b90e2009-11-29 03:42:31 +00001774 efx->type->start_stats(efx);
Jon Cooperf8f3b5a2013-09-30 17:36:50 +01001775 efx->type->pull_stats(efx);
1776 spin_lock_bh(&efx->stats_lock);
1777 efx->type->update_stats(efx, NULL, NULL);
1778 spin_unlock_bh(&efx->stats_lock);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001779}
1780
Ben Hutchings8b7325b2012-07-27 20:46:41 +01001781/* Quiesce the hardware and software data path, and regular activity
1782 * for the port without bringing the link down. Safe to call multiple
1783 * times with the NIC in almost any state, but interrupts should be
1784 * enabled. Requires the RTNL lock.
1785 */
Ben Hutchings8ceee662008-04-27 12:55:59 +01001786static void efx_stop_all(struct efx_nic *efx)
1787{
Ben Hutchings8ceee662008-04-27 12:55:59 +01001788 EFX_ASSERT_RESET_SERIALISED(efx);
1789
1790 /* port_enabled can be read safely under the rtnl lock */
1791 if (!efx->port_enabled)
1792 return;
1793
Jon Cooperf8f3b5a2013-09-30 17:36:50 +01001794 /* update stats before we go down so we can accurately count
1795 * rx_nodesc_drops
1796 */
1797 efx->type->pull_stats(efx);
1798 spin_lock_bh(&efx->stats_lock);
1799 efx->type->update_stats(efx, NULL, NULL);
1800 spin_unlock_bh(&efx->stats_lock);
Ben Hutchingsef2b90e2009-11-29 03:42:31 +00001801 efx->type->stop_stats(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001802 efx_stop_port(efx);
1803
Ben Hutchings29c69a42013-01-28 19:01:06 +00001804 /* Stop the kernel transmit interface. This is only valid if
1805 * the device is stopped or detached; otherwise the watchdog
1806 * may fire immediately.
1807 */
1808 WARN_ON(netif_running(efx->net_dev) &&
1809 netif_device_present(efx->net_dev));
Ben Hutchings9f2cb712012-02-08 00:11:20 +00001810 netif_tx_disable(efx->net_dev);
1811
1812 efx_stop_datapath(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001813}
1814
1815static void efx_remove_all(struct efx_nic *efx)
1816{
Ben Hutchings46426102010-09-10 06:42:33 +00001817 efx_remove_channels(efx);
Ben Hutchings7f967c02012-02-13 23:45:02 +00001818 efx_remove_filters(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001819 efx_remove_port(efx);
1820 efx_remove_nic(efx);
1821}
1822
Ben Hutchings8ceee662008-04-27 12:55:59 +01001823/**************************************************************************
1824 *
1825 * Interrupt moderation
1826 *
1827 **************************************************************************/
1828
Ben Hutchingscc180b62011-12-08 19:51:47 +00001829static unsigned int irq_mod_ticks(unsigned int usecs, unsigned int quantum_ns)
Ben Hutchings0d86ebd2009-10-23 08:32:13 +00001830{
Ben Hutchingsb548f972011-09-05 07:41:44 +00001831 if (usecs == 0)
1832 return 0;
Ben Hutchingscc180b62011-12-08 19:51:47 +00001833 if (usecs * 1000 < quantum_ns)
Ben Hutchings0d86ebd2009-10-23 08:32:13 +00001834 return 1; /* never round down to 0 */
Ben Hutchingscc180b62011-12-08 19:51:47 +00001835 return usecs * 1000 / quantum_ns;
Ben Hutchings0d86ebd2009-10-23 08:32:13 +00001836}
1837
Ben Hutchings8ceee662008-04-27 12:55:59 +01001838/* Set interrupt moderation parameters */
Ben Hutchings9e393b32011-09-05 07:43:04 +00001839int efx_init_irq_moderation(struct efx_nic *efx, unsigned int tx_usecs,
1840 unsigned int rx_usecs, bool rx_adaptive,
1841 bool rx_may_override_tx)
Ben Hutchings8ceee662008-04-27 12:55:59 +01001842{
Ben Hutchingsf7d12cd2010-09-10 06:41:47 +00001843 struct efx_channel *channel;
Ben Hutchingscc180b62011-12-08 19:51:47 +00001844 unsigned int irq_mod_max = DIV_ROUND_UP(efx->type->timer_period_max *
1845 efx->timer_quantum_ns,
1846 1000);
1847 unsigned int tx_ticks;
1848 unsigned int rx_ticks;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001849
1850 EFX_ASSERT_RESET_SERIALISED(efx);
1851
Ben Hutchingscc180b62011-12-08 19:51:47 +00001852 if (tx_usecs > irq_mod_max || rx_usecs > irq_mod_max)
Ben Hutchings9e393b32011-09-05 07:43:04 +00001853 return -EINVAL;
1854
Ben Hutchingscc180b62011-12-08 19:51:47 +00001855 tx_ticks = irq_mod_ticks(tx_usecs, efx->timer_quantum_ns);
1856 rx_ticks = irq_mod_ticks(rx_usecs, efx->timer_quantum_ns);
1857
Ben Hutchings9e393b32011-09-05 07:43:04 +00001858 if (tx_ticks != rx_ticks && efx->tx_channel_offset == 0 &&
1859 !rx_may_override_tx) {
1860 netif_err(efx, drv, efx->net_dev, "Channels are shared. "
1861 "RX and TX IRQ moderation must be equal\n");
1862 return -EINVAL;
1863 }
1864
Ben Hutchings6fb70fd2009-03-20 13:30:37 +00001865 efx->irq_rx_adaptive = rx_adaptive;
Ben Hutchings0d86ebd2009-10-23 08:32:13 +00001866 efx->irq_rx_moderation = rx_ticks;
Ben Hutchingsf7d12cd2010-09-10 06:41:47 +00001867 efx_for_each_channel(channel, efx) {
Ben Hutchings525da902011-02-07 23:04:38 +00001868 if (efx_channel_has_rx_queue(channel))
Ben Hutchingsf7d12cd2010-09-10 06:41:47 +00001869 channel->irq_moderation = rx_ticks;
Ben Hutchings525da902011-02-07 23:04:38 +00001870 else if (efx_channel_has_tx_queues(channel))
Ben Hutchingsf7d12cd2010-09-10 06:41:47 +00001871 channel->irq_moderation = tx_ticks;
1872 }
Ben Hutchings9e393b32011-09-05 07:43:04 +00001873
1874 return 0;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001875}
1876
Ben Hutchingsa0c4faf2011-09-05 07:42:25 +00001877void efx_get_irq_moderation(struct efx_nic *efx, unsigned int *tx_usecs,
1878 unsigned int *rx_usecs, bool *rx_adaptive)
1879{
Ben Hutchingscc180b62011-12-08 19:51:47 +00001880 /* We must round up when converting ticks to microseconds
1881 * because we round down when converting the other way.
1882 */
1883
Ben Hutchingsa0c4faf2011-09-05 07:42:25 +00001884 *rx_adaptive = efx->irq_rx_adaptive;
Ben Hutchingscc180b62011-12-08 19:51:47 +00001885 *rx_usecs = DIV_ROUND_UP(efx->irq_rx_moderation *
1886 efx->timer_quantum_ns,
1887 1000);
Ben Hutchingsa0c4faf2011-09-05 07:42:25 +00001888
1889 /* If channels are shared between RX and TX, so is IRQ
1890 * moderation. Otherwise, IRQ moderation is the same for all
1891 * TX channels and is not adaptive.
1892 */
1893 if (efx->tx_channel_offset == 0)
1894 *tx_usecs = *rx_usecs;
1895 else
Ben Hutchingscc180b62011-12-08 19:51:47 +00001896 *tx_usecs = DIV_ROUND_UP(
Ben Hutchingsa0c4faf2011-09-05 07:42:25 +00001897 efx->channel[efx->tx_channel_offset]->irq_moderation *
Ben Hutchingscc180b62011-12-08 19:51:47 +00001898 efx->timer_quantum_ns,
1899 1000);
Ben Hutchingsa0c4faf2011-09-05 07:42:25 +00001900}
1901
Ben Hutchings8ceee662008-04-27 12:55:59 +01001902/**************************************************************************
1903 *
1904 * Hardware monitor
1905 *
1906 **************************************************************************/
1907
Ben Hutchingse254c272010-09-20 08:44:10 +00001908/* Run periodically off the general workqueue */
Ben Hutchings8ceee662008-04-27 12:55:59 +01001909static void efx_monitor(struct work_struct *data)
1910{
1911 struct efx_nic *efx = container_of(data, struct efx_nic,
1912 monitor_work.work);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001913
Ben Hutchings62776d02010-06-23 11:30:07 +00001914 netif_vdbg(efx, timer, efx->net_dev,
1915 "hardware monitor executing on CPU %d\n",
1916 raw_smp_processor_id());
Ben Hutchingsef2b90e2009-11-29 03:42:31 +00001917 BUG_ON(efx->type->monitor == NULL);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001918
Ben Hutchings8ceee662008-04-27 12:55:59 +01001919 /* If the mac_lock is already held then it is likely a port
1920 * reconfiguration is already in place, which will likely do
Ben Hutchingse254c272010-09-20 08:44:10 +00001921 * most of the work of monitor() anyway. */
1922 if (mutex_trylock(&efx->mac_lock)) {
1923 if (efx->port_enabled)
1924 efx->type->monitor(efx);
1925 mutex_unlock(&efx->mac_lock);
1926 }
Ben Hutchings8ceee662008-04-27 12:55:59 +01001927
Ben Hutchings8ceee662008-04-27 12:55:59 +01001928 queue_delayed_work(efx->workqueue, &efx->monitor_work,
1929 efx_monitor_interval);
1930}
1931
1932/**************************************************************************
1933 *
1934 * ioctls
1935 *
1936 *************************************************************************/
1937
1938/* Net device ioctl
1939 * Context: process, rtnl_lock() held.
1940 */
1941static int efx_ioctl(struct net_device *net_dev, struct ifreq *ifr, int cmd)
1942{
Ben Hutchings767e4682008-09-01 12:43:14 +01001943 struct efx_nic *efx = netdev_priv(net_dev);
Ben Hutchings68e7f452009-04-29 08:05:08 +00001944 struct mii_ioctl_data *data = if_mii(ifr);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001945
Stuart Hodgson7c236c42012-09-03 11:09:36 +01001946 if (cmd == SIOCSHWTSTAMP)
Ben Hutchings433dc9b2013-11-14 01:26:21 +00001947 return efx_ptp_set_ts_config(efx, ifr);
1948 if (cmd == SIOCGHWTSTAMP)
1949 return efx_ptp_get_ts_config(efx, ifr);
Stuart Hodgson7c236c42012-09-03 11:09:36 +01001950
Ben Hutchings68e7f452009-04-29 08:05:08 +00001951 /* Convert phy_id from older PRTAD/DEVAD format */
1952 if ((cmd == SIOCGMIIREG || cmd == SIOCSMIIREG) &&
1953 (data->phy_id & 0xfc00) == 0x0400)
1954 data->phy_id ^= MDIO_PHY_ID_C45 | 0x0400;
1955
1956 return mdio_mii_ioctl(&efx->mdio, data, cmd);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001957}
1958
1959/**************************************************************************
1960 *
1961 * NAPI interface
1962 *
1963 **************************************************************************/
1964
Ben Hutchings7f967c02012-02-13 23:45:02 +00001965static void efx_init_napi_channel(struct efx_channel *channel)
1966{
1967 struct efx_nic *efx = channel->efx;
1968
1969 channel->napi_dev = efx->net_dev;
1970 netif_napi_add(channel->napi_dev, &channel->napi_str,
1971 efx_poll, napi_weight);
Alexandre Rames36763262014-07-22 14:03:25 +01001972 napi_hash_add(&channel->napi_str);
1973 efx_channel_init_lock(channel);
Ben Hutchings7f967c02012-02-13 23:45:02 +00001974}
1975
Ben Hutchingse8f14992010-12-07 19:47:34 +00001976static void efx_init_napi(struct efx_nic *efx)
Ben Hutchings8ceee662008-04-27 12:55:59 +01001977{
1978 struct efx_channel *channel;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001979
Ben Hutchings7f967c02012-02-13 23:45:02 +00001980 efx_for_each_channel(channel, efx)
1981 efx_init_napi_channel(channel);
Ben Hutchingse8f14992010-12-07 19:47:34 +00001982}
1983
1984static void efx_fini_napi_channel(struct efx_channel *channel)
1985{
Alexandre Rames36763262014-07-22 14:03:25 +01001986 if (channel->napi_dev) {
Ben Hutchingse8f14992010-12-07 19:47:34 +00001987 netif_napi_del(&channel->napi_str);
Alexandre Rames36763262014-07-22 14:03:25 +01001988 napi_hash_del(&channel->napi_str);
1989 }
Ben Hutchingse8f14992010-12-07 19:47:34 +00001990 channel->napi_dev = NULL;
Ben Hutchings8ceee662008-04-27 12:55:59 +01001991}
1992
1993static void efx_fini_napi(struct efx_nic *efx)
1994{
1995 struct efx_channel *channel;
1996
Ben Hutchingse8f14992010-12-07 19:47:34 +00001997 efx_for_each_channel(channel, efx)
1998 efx_fini_napi_channel(channel);
Ben Hutchings8ceee662008-04-27 12:55:59 +01001999}
2000
2001/**************************************************************************
2002 *
2003 * Kernel netpoll interface
2004 *
2005 *************************************************************************/
2006
2007#ifdef CONFIG_NET_POLL_CONTROLLER
2008
2009/* Although in the common case interrupts will be disabled, this is not
2010 * guaranteed. However, all our work happens inside the NAPI callback,
2011 * so no locking is required.
2012 */
2013static void efx_netpoll(struct net_device *net_dev)
2014{
Ben Hutchings767e4682008-09-01 12:43:14 +01002015 struct efx_nic *efx = netdev_priv(net_dev);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002016 struct efx_channel *channel;
2017
Ben Hutchings64ee3122008-09-01 12:47:38 +01002018 efx_for_each_channel(channel, efx)
Ben Hutchings8ceee662008-04-27 12:55:59 +01002019 efx_schedule_channel(channel);
2020}
2021
2022#endif
2023
Alexandre Rames36763262014-07-22 14:03:25 +01002024#ifdef CONFIG_NET_RX_BUSY_POLL
2025static int efx_busy_poll(struct napi_struct *napi)
2026{
2027 struct efx_channel *channel =
2028 container_of(napi, struct efx_channel, napi_str);
2029 struct efx_nic *efx = channel->efx;
2030 int budget = 4;
2031 int old_rx_packets, rx_packets;
2032
2033 if (!netif_running(efx->net_dev))
2034 return LL_FLUSH_FAILED;
2035
2036 if (!efx_channel_lock_poll(channel))
2037 return LL_FLUSH_BUSY;
2038
2039 old_rx_packets = channel->rx_queue.rx_packets;
2040 efx_process_channel(channel, budget);
2041
2042 rx_packets = channel->rx_queue.rx_packets - old_rx_packets;
2043
2044 /* There is no race condition with NAPI here.
2045 * NAPI will automatically be rescheduled if it yielded during busy
2046 * polling, because it was not able to take the lock and thus returned
2047 * the full budget.
2048 */
2049 efx_channel_unlock_poll(channel);
2050
2051 return rx_packets;
2052}
2053#endif
2054
Ben Hutchings8ceee662008-04-27 12:55:59 +01002055/**************************************************************************
2056 *
2057 * Kernel net device interface
2058 *
2059 *************************************************************************/
2060
2061/* Context: process, rtnl_lock() held. */
2062static int efx_net_open(struct net_device *net_dev)
2063{
Ben Hutchings767e4682008-09-01 12:43:14 +01002064 struct efx_nic *efx = netdev_priv(net_dev);
Ben Hutchings8b7325b2012-07-27 20:46:41 +01002065 int rc;
2066
Ben Hutchings62776d02010-06-23 11:30:07 +00002067 netif_dbg(efx, ifup, efx->net_dev, "opening device on CPU %d\n",
2068 raw_smp_processor_id());
Ben Hutchings8ceee662008-04-27 12:55:59 +01002069
Ben Hutchings8b7325b2012-07-27 20:46:41 +01002070 rc = efx_check_disabled(efx);
2071 if (rc)
2072 return rc;
Ben Hutchingsf8b87c12008-09-01 12:48:17 +01002073 if (efx->phy_mode & PHY_MODE_SPECIAL)
2074 return -EBUSY;
Ben Hutchings8880f4e2009-11-29 15:15:41 +00002075 if (efx_mcdi_poll_reboot(efx) && efx_reset(efx, RESET_TYPE_ALL))
2076 return -EIO;
Ben Hutchingsf8b87c12008-09-01 12:48:17 +01002077
Steve Hodgson78c1f0a2009-11-29 03:43:00 +00002078 /* Notify the kernel of the link state polled during driver load,
2079 * before the monitor starts running */
2080 efx_link_status_changed(efx);
2081
Ben Hutchings8ceee662008-04-27 12:55:59 +01002082 efx_start_all(efx);
Ben Hutchingsdd407812012-02-28 23:40:21 +00002083 efx_selftest_async_start(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002084 return 0;
2085}
2086
2087/* Context: process, rtnl_lock() held.
2088 * Note that the kernel will ignore our return code; this method
2089 * should really be a void.
2090 */
2091static int efx_net_stop(struct net_device *net_dev)
2092{
Ben Hutchings767e4682008-09-01 12:43:14 +01002093 struct efx_nic *efx = netdev_priv(net_dev);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002094
Ben Hutchings62776d02010-06-23 11:30:07 +00002095 netif_dbg(efx, ifdown, efx->net_dev, "closing on CPU %d\n",
2096 raw_smp_processor_id());
Ben Hutchings8ceee662008-04-27 12:55:59 +01002097
Ben Hutchings8b7325b2012-07-27 20:46:41 +01002098 /* Stop the device and flush all the channels */
2099 efx_stop_all(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002100
2101 return 0;
2102}
2103
Ben Hutchings5b9e2072008-05-16 21:18:14 +01002104/* Context: process, dev_base_lock or RTNL held, non-blocking. */
Ben Hutchings2aa9ef12012-01-09 19:53:41 +00002105static struct rtnl_link_stats64 *efx_net_stats(struct net_device *net_dev,
2106 struct rtnl_link_stats64 *stats)
Ben Hutchings8ceee662008-04-27 12:55:59 +01002107{
Ben Hutchings767e4682008-09-01 12:43:14 +01002108 struct efx_nic *efx = netdev_priv(net_dev);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002109
Ben Hutchings55edc6e2009-11-25 16:11:35 +00002110 spin_lock_bh(&efx->stats_lock);
Ben Hutchingscd0ecc92012-12-14 21:52:56 +00002111 efx->type->update_stats(efx, NULL, stats);
Ben Hutchings1cb34522011-09-02 23:23:00 +01002112 spin_unlock_bh(&efx->stats_lock);
2113
Ben Hutchings8ceee662008-04-27 12:55:59 +01002114 return stats;
2115}
2116
2117/* Context: netif_tx_lock held, BHs disabled. */
2118static void efx_watchdog(struct net_device *net_dev)
2119{
Ben Hutchings767e4682008-09-01 12:43:14 +01002120 struct efx_nic *efx = netdev_priv(net_dev);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002121
Ben Hutchings62776d02010-06-23 11:30:07 +00002122 netif_err(efx, tx_err, efx->net_dev,
2123 "TX stuck with port_enabled=%d: resetting channels\n",
2124 efx->port_enabled);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002125
Ben Hutchings739bb23d2008-11-04 20:35:36 +00002126 efx_schedule_reset(efx, RESET_TYPE_TX_WATCHDOG);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002127}
2128
2129
2130/* Context: process, rtnl_lock() held. */
2131static int efx_change_mtu(struct net_device *net_dev, int new_mtu)
2132{
Ben Hutchings767e4682008-09-01 12:43:14 +01002133 struct efx_nic *efx = netdev_priv(net_dev);
Ben Hutchings8b7325b2012-07-27 20:46:41 +01002134 int rc;
Ben Hutchings8ceee662008-04-27 12:55:59 +01002135
Ben Hutchings8b7325b2012-07-27 20:46:41 +01002136 rc = efx_check_disabled(efx);
2137 if (rc)
2138 return rc;
Ben Hutchings8ceee662008-04-27 12:55:59 +01002139 if (new_mtu > EFX_MAX_MTU)
2140 return -EINVAL;
2141
Ben Hutchings62776d02010-06-23 11:30:07 +00002142 netif_dbg(efx, drv, efx->net_dev, "changing MTU to %d\n", new_mtu);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002143
Ben Hutchings29c69a42013-01-28 19:01:06 +00002144 efx_device_detach_sync(efx);
2145 efx_stop_all(efx);
2146
Ben Hutchingsd3245b22009-11-29 03:42:41 +00002147 mutex_lock(&efx->mac_lock);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002148 net_dev->mtu = new_mtu;
Ben Hutchings710b2082011-09-03 00:15:00 +01002149 efx->type->reconfigure_mac(efx);
Ben Hutchingsd3245b22009-11-29 03:42:41 +00002150 mutex_unlock(&efx->mac_lock);
2151
Ben Hutchings8ceee662008-04-27 12:55:59 +01002152 efx_start_all(efx);
Ben Hutchings29c69a42013-01-28 19:01:06 +00002153 netif_device_attach(efx->net_dev);
Ben Hutchings6c8eef42012-01-09 19:54:16 +00002154 return 0;
Ben Hutchings8ceee662008-04-27 12:55:59 +01002155}
2156
2157static int efx_set_mac_address(struct net_device *net_dev, void *data)
2158{
Ben Hutchings767e4682008-09-01 12:43:14 +01002159 struct efx_nic *efx = netdev_priv(net_dev);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002160 struct sockaddr *addr = data;
Ben Hutchingse0b3ae32014-02-12 18:59:54 +00002161 u8 *new_addr = addr->sa_data;
Ben Hutchings8ceee662008-04-27 12:55:59 +01002162
Ben Hutchings8ceee662008-04-27 12:55:59 +01002163 if (!is_valid_ether_addr(new_addr)) {
Ben Hutchings62776d02010-06-23 11:30:07 +00002164 netif_err(efx, drv, efx->net_dev,
2165 "invalid ethernet MAC address requested: %pM\n",
2166 new_addr);
Danny Kukawka504f9b52012-02-21 02:07:49 +00002167 return -EADDRNOTAVAIL;
Ben Hutchings8ceee662008-04-27 12:55:59 +01002168 }
2169
Edward Creecd84ff42014-03-07 18:27:41 +00002170 ether_addr_copy(net_dev->dev_addr, new_addr);
Shradha Shahd98a4ff2014-11-05 12:16:46 +00002171 efx->type->sriov_mac_address_changed(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002172
2173 /* Reconfigure the MAC */
Ben Hutchingsd3245b22009-11-29 03:42:41 +00002174 mutex_lock(&efx->mac_lock);
Ben Hutchings710b2082011-09-03 00:15:00 +01002175 efx->type->reconfigure_mac(efx);
Ben Hutchingsd3245b22009-11-29 03:42:41 +00002176 mutex_unlock(&efx->mac_lock);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002177
2178 return 0;
2179}
2180
Ben Hutchingsa816f752008-09-01 12:49:12 +01002181/* Context: netif_addr_lock held, BHs disabled. */
Ben Hutchings0fca8c92012-01-09 19:54:44 +00002182static void efx_set_rx_mode(struct net_device *net_dev)
Ben Hutchings8ceee662008-04-27 12:55:59 +01002183{
Ben Hutchings767e4682008-09-01 12:43:14 +01002184 struct efx_nic *efx = netdev_priv(net_dev);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002185
Ben Hutchings8be4f3e2009-11-25 16:12:16 +00002186 if (efx->port_enabled)
2187 queue_work(efx->workqueue, &efx->mac_work);
2188 /* Otherwise efx_start_port() will do this */
Ben Hutchings8ceee662008-04-27 12:55:59 +01002189}
2190
Michał Mirosławc8f44af2011-11-15 15:29:55 +00002191static int efx_set_features(struct net_device *net_dev, netdev_features_t data)
Ben Hutchingsabfe9032011-04-05 15:00:02 +01002192{
2193 struct efx_nic *efx = netdev_priv(net_dev);
2194
2195 /* If disabling RX n-tuple filtering, clear existing filters */
2196 if (net_dev->features & ~data & NETIF_F_NTUPLE)
Ben Hutchingsfbd79122013-11-21 19:15:03 +00002197 return efx->type->filter_clear_rx(efx, EFX_FILTER_PRI_MANUAL);
Ben Hutchingsabfe9032011-04-05 15:00:02 +01002198
2199 return 0;
2200}
2201
Ben Hutchings8127d662013-08-29 19:19:29 +01002202static const struct net_device_ops efx_farch_netdev_ops = {
Stephen Hemmingerc3ecb9f2008-11-21 17:32:54 -08002203 .ndo_open = efx_net_open,
2204 .ndo_stop = efx_net_stop,
Ben Hutchings44727022010-06-08 07:21:12 +00002205 .ndo_get_stats64 = efx_net_stats,
Stephen Hemmingerc3ecb9f2008-11-21 17:32:54 -08002206 .ndo_tx_timeout = efx_watchdog,
2207 .ndo_start_xmit = efx_hard_start_xmit,
2208 .ndo_validate_addr = eth_validate_addr,
2209 .ndo_do_ioctl = efx_ioctl,
2210 .ndo_change_mtu = efx_change_mtu,
2211 .ndo_set_mac_address = efx_set_mac_address,
Ben Hutchings0fca8c92012-01-09 19:54:44 +00002212 .ndo_set_rx_mode = efx_set_rx_mode,
Ben Hutchingsabfe9032011-04-05 15:00:02 +01002213 .ndo_set_features = efx_set_features,
Ben Hutchingscd2d5b52012-02-14 00:48:07 +00002214#ifdef CONFIG_SFC_SRIOV
Shradha Shah327c6852014-11-05 12:16:32 +00002215 .ndo_set_vf_mac = efx_siena_sriov_set_vf_mac,
2216 .ndo_set_vf_vlan = efx_siena_sriov_set_vf_vlan,
2217 .ndo_set_vf_spoofchk = efx_siena_sriov_set_vf_spoofchk,
2218 .ndo_get_vf_config = efx_siena_sriov_get_vf_config,
Ben Hutchingscd2d5b52012-02-14 00:48:07 +00002219#endif
Stephen Hemmingerc3ecb9f2008-11-21 17:32:54 -08002220#ifdef CONFIG_NET_POLL_CONTROLLER
2221 .ndo_poll_controller = efx_netpoll,
2222#endif
Ben Hutchings94b274b2011-01-10 21:18:20 +00002223 .ndo_setup_tc = efx_setup_tc,
Alexandre Rames36763262014-07-22 14:03:25 +01002224#ifdef CONFIG_NET_RX_BUSY_POLL
2225 .ndo_busy_poll = efx_busy_poll,
2226#endif
Ben Hutchings64d8ad62011-01-05 00:50:41 +00002227#ifdef CONFIG_RFS_ACCEL
2228 .ndo_rx_flow_steer = efx_filter_rfs,
2229#endif
Stephen Hemmingerc3ecb9f2008-11-21 17:32:54 -08002230};
2231
Ben Hutchings8127d662013-08-29 19:19:29 +01002232static const struct net_device_ops efx_ef10_netdev_ops = {
2233 .ndo_open = efx_net_open,
2234 .ndo_stop = efx_net_stop,
2235 .ndo_get_stats64 = efx_net_stats,
2236 .ndo_tx_timeout = efx_watchdog,
2237 .ndo_start_xmit = efx_hard_start_xmit,
2238 .ndo_validate_addr = eth_validate_addr,
2239 .ndo_do_ioctl = efx_ioctl,
2240 .ndo_change_mtu = efx_change_mtu,
2241 .ndo_set_mac_address = efx_set_mac_address,
2242 .ndo_set_rx_mode = efx_set_rx_mode,
2243 .ndo_set_features = efx_set_features,
2244#ifdef CONFIG_NET_POLL_CONTROLLER
2245 .ndo_poll_controller = efx_netpoll,
2246#endif
Alexandre Rames36763262014-07-22 14:03:25 +01002247#ifdef CONFIG_NET_RX_BUSY_POLL
2248 .ndo_busy_poll = efx_busy_poll,
2249#endif
Ben Hutchings8127d662013-08-29 19:19:29 +01002250#ifdef CONFIG_RFS_ACCEL
2251 .ndo_rx_flow_steer = efx_filter_rfs,
2252#endif
2253};
2254
Ben Hutchings7dde5962008-12-12 22:09:38 -08002255static void efx_update_name(struct efx_nic *efx)
2256{
2257 strcpy(efx->name, efx->net_dev->name);
2258 efx_mtd_rename(efx);
2259 efx_set_channel_names(efx);
2260}
2261
Ben Hutchings8ceee662008-04-27 12:55:59 +01002262static int efx_netdev_event(struct notifier_block *this,
2263 unsigned long event, void *ptr)
2264{
Jiri Pirko351638e2013-05-28 01:30:21 +00002265 struct net_device *net_dev = netdev_notifier_info_to_dev(ptr);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002266
Ben Hutchings8127d662013-08-29 19:19:29 +01002267 if ((net_dev->netdev_ops == &efx_farch_netdev_ops ||
2268 net_dev->netdev_ops == &efx_ef10_netdev_ops) &&
Ben Hutchings7dde5962008-12-12 22:09:38 -08002269 event == NETDEV_CHANGENAME)
2270 efx_update_name(netdev_priv(net_dev));
Ben Hutchings8ceee662008-04-27 12:55:59 +01002271
2272 return NOTIFY_DONE;
2273}
2274
2275static struct notifier_block efx_netdev_notifier = {
2276 .notifier_call = efx_netdev_event,
2277};
2278
Ben Hutchings06d5e192008-12-12 21:47:23 -08002279static ssize_t
2280show_phy_type(struct device *dev, struct device_attribute *attr, char *buf)
2281{
2282 struct efx_nic *efx = pci_get_drvdata(to_pci_dev(dev));
2283 return sprintf(buf, "%d\n", efx->phy_type);
2284}
Ben Hutchings776fbcc2013-06-18 17:45:40 +01002285static DEVICE_ATTR(phy_type, 0444, show_phy_type, NULL);
Ben Hutchings06d5e192008-12-12 21:47:23 -08002286
Ben Hutchings8ceee662008-04-27 12:55:59 +01002287static int efx_register_netdev(struct efx_nic *efx)
2288{
2289 struct net_device *net_dev = efx->net_dev;
Ben Hutchingsc04bfc62010-12-10 01:24:16 +00002290 struct efx_channel *channel;
Ben Hutchings8ceee662008-04-27 12:55:59 +01002291 int rc;
2292
2293 net_dev->watchdog_timeo = 5 * HZ;
2294 net_dev->irq = efx->pci_dev->irq;
Ben Hutchings8127d662013-08-29 19:19:29 +01002295 if (efx_nic_rev(efx) >= EFX_REV_HUNT_A0) {
2296 net_dev->netdev_ops = &efx_ef10_netdev_ops;
2297 net_dev->priv_flags |= IFF_UNICAST_FLT;
2298 } else {
2299 net_dev->netdev_ops = &efx_farch_netdev_ops;
2300 }
Wilfried Klaebe7ad24ea2014-05-11 00:12:32 +00002301 net_dev->ethtool_ops = &efx_ethtool_ops;
Ben Hutchings7e6d06f2012-07-30 15:57:44 +00002302 net_dev->gso_max_segs = EFX_TSO_MAX_SEGS;
Ben Hutchings8ceee662008-04-27 12:55:59 +01002303
Ben Hutchings7dde5962008-12-12 22:09:38 -08002304 rtnl_lock();
Ben Hutchingsaed06282009-08-26 08:16:27 +00002305
Ben Hutchings7153f622012-07-27 20:50:52 +01002306 /* Enable resets to be scheduled and check whether any were
2307 * already requested. If so, the NIC is probably hosed so we
2308 * abort.
2309 */
2310 efx->state = STATE_READY;
2311 smp_mb(); /* ensure we change state before checking reset_pending */
2312 if (efx->reset_pending) {
2313 netif_err(efx, probe, efx->net_dev,
2314 "aborting probe due to scheduled reset\n");
2315 rc = -EIO;
2316 goto fail_locked;
2317 }
2318
Ben Hutchingsaed06282009-08-26 08:16:27 +00002319 rc = dev_alloc_name(net_dev, net_dev->name);
2320 if (rc < 0)
2321 goto fail_locked;
Ben Hutchings7dde5962008-12-12 22:09:38 -08002322 efx_update_name(efx);
Ben Hutchingsaed06282009-08-26 08:16:27 +00002323
Ben Hutchings8f8b3d52012-08-24 18:04:38 +01002324 /* Always start with carrier off; PHY events will detect the link */
2325 netif_carrier_off(net_dev);
2326
Ben Hutchingsaed06282009-08-26 08:16:27 +00002327 rc = register_netdevice(net_dev);
2328 if (rc)
2329 goto fail_locked;
2330
Ben Hutchingsc04bfc62010-12-10 01:24:16 +00002331 efx_for_each_channel(channel, efx) {
2332 struct efx_tx_queue *tx_queue;
Ben Hutchings60031fc2011-01-12 18:39:40 +00002333 efx_for_each_channel_tx_queue(tx_queue, channel)
2334 efx_init_tx_queue_core_txq(tx_queue);
Ben Hutchingsc04bfc62010-12-10 01:24:16 +00002335 }
2336
Ben Hutchings0bcf4a62013-10-18 19:21:45 +01002337 efx_associate(efx);
2338
Ben Hutchings7dde5962008-12-12 22:09:38 -08002339 rtnl_unlock();
Ben Hutchings8ceee662008-04-27 12:55:59 +01002340
Ben Hutchings06d5e192008-12-12 21:47:23 -08002341 rc = device_create_file(&efx->pci_dev->dev, &dev_attr_phy_type);
2342 if (rc) {
Ben Hutchings62776d02010-06-23 11:30:07 +00002343 netif_err(efx, drv, efx->net_dev,
2344 "failed to init net dev attributes\n");
Ben Hutchings06d5e192008-12-12 21:47:23 -08002345 goto fail_registered;
2346 }
2347
Ben Hutchings8ceee662008-04-27 12:55:59 +01002348 return 0;
Ben Hutchings06d5e192008-12-12 21:47:23 -08002349
Ben Hutchings7153f622012-07-27 20:50:52 +01002350fail_registered:
2351 rtnl_lock();
Ben Hutchings0bcf4a62013-10-18 19:21:45 +01002352 efx_dissociate(efx);
Ben Hutchings7153f622012-07-27 20:50:52 +01002353 unregister_netdevice(net_dev);
Ben Hutchingsaed06282009-08-26 08:16:27 +00002354fail_locked:
Ben Hutchings7153f622012-07-27 20:50:52 +01002355 efx->state = STATE_UNINIT;
Ben Hutchingsaed06282009-08-26 08:16:27 +00002356 rtnl_unlock();
Ben Hutchings62776d02010-06-23 11:30:07 +00002357 netif_err(efx, drv, efx->net_dev, "could not register net dev\n");
Ben Hutchingsaed06282009-08-26 08:16:27 +00002358 return rc;
Ben Hutchings8ceee662008-04-27 12:55:59 +01002359}
2360
2361static void efx_unregister_netdev(struct efx_nic *efx)
2362{
Ben Hutchings8ceee662008-04-27 12:55:59 +01002363 if (!efx->net_dev)
2364 return;
2365
Ben Hutchings767e4682008-09-01 12:43:14 +01002366 BUG_ON(netdev_priv(efx->net_dev) != efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002367
Ben Hutchings73ba7b62012-01-09 19:47:08 +00002368 strlcpy(efx->name, pci_name(efx->pci_dev), sizeof(efx->name));
2369 device_remove_file(&efx->pci_dev->dev, &dev_attr_phy_type);
Ben Hutchings7153f622012-07-27 20:50:52 +01002370
2371 rtnl_lock();
2372 unregister_netdevice(efx->net_dev);
2373 efx->state = STATE_UNINIT;
2374 rtnl_unlock();
Ben Hutchings8ceee662008-04-27 12:55:59 +01002375}
2376
2377/**************************************************************************
2378 *
2379 * Device reset and suspend
2380 *
2381 **************************************************************************/
2382
Ben Hutchings2467ca42008-09-01 12:48:50 +01002383/* Tears down the entire software state and most of the hardware state
2384 * before reset. */
Ben Hutchingsd3245b22009-11-29 03:42:41 +00002385void efx_reset_down(struct efx_nic *efx, enum reset_type method)
Ben Hutchings8ceee662008-04-27 12:55:59 +01002386{
Ben Hutchings8ceee662008-04-27 12:55:59 +01002387 EFX_ASSERT_RESET_SERIALISED(efx);
2388
Edward Creee2835462014-04-16 19:27:48 +01002389 if (method == RESET_TYPE_MCDI_TIMEOUT)
2390 efx->type->prepare_flr(efx);
2391
Ben Hutchings2467ca42008-09-01 12:48:50 +01002392 efx_stop_all(efx);
Ben Hutchingsd8291182012-10-05 23:35:41 +01002393 efx_disable_interrupts(efx);
Ben Hutchings5642cee2012-07-27 19:35:52 +01002394
2395 mutex_lock(&efx->mac_lock);
Steve Hodgson4b988282009-01-29 17:50:51 +00002396 if (efx->port_initialized && method != RESET_TYPE_INVISIBLE)
2397 efx->phy_op->fini(efx);
Ben Hutchingsef2b90e2009-11-29 03:42:31 +00002398 efx->type->fini(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002399}
2400
Ben Hutchings2467ca42008-09-01 12:48:50 +01002401/* This function will always ensure that the locks acquired in
2402 * efx_reset_down() are released. A failure return code indicates
2403 * that we were unable to reinitialise the hardware, and the
2404 * driver should be disabled. If ok is false, then the rx and tx
2405 * engines are not restarted, pending a RESET_DISABLE. */
Ben Hutchingsd3245b22009-11-29 03:42:41 +00002406int efx_reset_up(struct efx_nic *efx, enum reset_type method, bool ok)
Ben Hutchings8ceee662008-04-27 12:55:59 +01002407{
2408 int rc;
2409
Ben Hutchings2467ca42008-09-01 12:48:50 +01002410 EFX_ASSERT_RESET_SERIALISED(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002411
Edward Creee2835462014-04-16 19:27:48 +01002412 if (method == RESET_TYPE_MCDI_TIMEOUT)
2413 efx->type->finish_flr(efx);
2414
2415 /* Ensure that SRAM is initialised even if we're disabling the device */
Ben Hutchingsef2b90e2009-11-29 03:42:31 +00002416 rc = efx->type->init(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002417 if (rc) {
Ben Hutchings62776d02010-06-23 11:30:07 +00002418 netif_err(efx, drv, efx->net_dev, "failed to initialise NIC\n");
Ben Hutchingseb9f6742009-11-29 03:43:15 +00002419 goto fail;
Ben Hutchings8ceee662008-04-27 12:55:59 +01002420 }
2421
Ben Hutchingseb9f6742009-11-29 03:43:15 +00002422 if (!ok)
2423 goto fail;
2424
Steve Hodgson4b988282009-01-29 17:50:51 +00002425 if (efx->port_initialized && method != RESET_TYPE_INVISIBLE) {
Ben Hutchingseb9f6742009-11-29 03:43:15 +00002426 rc = efx->phy_op->init(efx);
2427 if (rc)
2428 goto fail;
2429 if (efx->phy_op->reconfigure(efx))
Ben Hutchings62776d02010-06-23 11:30:07 +00002430 netif_err(efx, drv, efx->net_dev,
2431 "could not restore PHY settings\n");
Steve Hodgson4b988282009-01-29 17:50:51 +00002432 }
2433
Jon Cooper261e4d92013-04-15 18:51:54 +01002434 rc = efx_enable_interrupts(efx);
2435 if (rc)
2436 goto fail;
Ben Hutchings64eebcf2010-09-20 08:43:07 +00002437 efx_restore_filters(efx);
Shradha Shahd98a4ff2014-11-05 12:16:46 +00002438 efx->type->sriov_reset(efx);
Ben Hutchings2467ca42008-09-01 12:48:50 +01002439
2440 mutex_unlock(&efx->mac_lock);
2441
Ben Hutchingseb9f6742009-11-29 03:43:15 +00002442 efx_start_all(efx);
2443
2444 return 0;
2445
2446fail:
2447 efx->port_initialized = false;
2448
Ben Hutchingseb9f6742009-11-29 03:43:15 +00002449 mutex_unlock(&efx->mac_lock);
2450
Ben Hutchings8ceee662008-04-27 12:55:59 +01002451 return rc;
2452}
2453
Ben Hutchingseb9f6742009-11-29 03:43:15 +00002454/* Reset the NIC using the specified method. Note that the reset may
2455 * fail, in which case the card will be left in an unusable state.
Ben Hutchings8ceee662008-04-27 12:55:59 +01002456 *
Ben Hutchingseb9f6742009-11-29 03:43:15 +00002457 * Caller must hold the rtnl_lock.
Ben Hutchings8ceee662008-04-27 12:55:59 +01002458 */
Ben Hutchingseb9f6742009-11-29 03:43:15 +00002459int efx_reset(struct efx_nic *efx, enum reset_type method)
Ben Hutchings8ceee662008-04-27 12:55:59 +01002460{
Ben Hutchingseb9f6742009-11-29 03:43:15 +00002461 int rc, rc2;
2462 bool disabled;
Ben Hutchings8ceee662008-04-27 12:55:59 +01002463
Ben Hutchings62776d02010-06-23 11:30:07 +00002464 netif_info(efx, drv, efx->net_dev, "resetting (%s)\n",
2465 RESET_TYPE(method));
Ben Hutchings8ceee662008-04-27 12:55:59 +01002466
Daniel Pieczkoc2f3b8e2012-10-17 13:21:23 +01002467 efx_device_detach_sync(efx);
Ben Hutchingsd3245b22009-11-29 03:42:41 +00002468 efx_reset_down(efx, method);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002469
Ben Hutchingsef2b90e2009-11-29 03:42:31 +00002470 rc = efx->type->reset(efx, method);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002471 if (rc) {
Ben Hutchings62776d02010-06-23 11:30:07 +00002472 netif_err(efx, drv, efx->net_dev, "failed to reset hardware\n");
Ben Hutchingseb9f6742009-11-29 03:43:15 +00002473 goto out;
Ben Hutchings8ceee662008-04-27 12:55:59 +01002474 }
2475
Ben Hutchingsa7d529a2011-06-24 20:46:31 +01002476 /* Clear flags for the scopes we covered. We assume the NIC and
2477 * driver are now quiescent so that there is no race here.
2478 */
Edward Creee2835462014-04-16 19:27:48 +01002479 if (method < RESET_TYPE_MAX_METHOD)
2480 efx->reset_pending &= -(1 << (method + 1));
2481 else /* it doesn't fit into the well-ordered scope hierarchy */
2482 __clear_bit(method, &efx->reset_pending);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002483
2484 /* Reinitialise bus-mastering, which may have been turned off before
2485 * the reset was scheduled. This is still appropriate, even in the
2486 * RESET_TYPE_DISABLE since this driver generally assumes the hardware
2487 * can respond to requests. */
2488 pci_set_master(efx->pci_dev);
2489
Ben Hutchingseb9f6742009-11-29 03:43:15 +00002490out:
Ben Hutchings8ceee662008-04-27 12:55:59 +01002491 /* Leave device stopped if necessary */
Alexandre Rames626950d2013-01-14 17:20:22 +00002492 disabled = rc ||
2493 method == RESET_TYPE_DISABLE ||
2494 method == RESET_TYPE_RECOVER_OR_DISABLE;
Ben Hutchingseb9f6742009-11-29 03:43:15 +00002495 rc2 = efx_reset_up(efx, method, !disabled);
2496 if (rc2) {
2497 disabled = true;
2498 if (!rc)
2499 rc = rc2;
Ben Hutchings8ceee662008-04-27 12:55:59 +01002500 }
2501
Ben Hutchingseb9f6742009-11-29 03:43:15 +00002502 if (disabled) {
Ben Hutchingsf49a4582010-04-28 09:01:33 +00002503 dev_close(efx->net_dev);
Ben Hutchings62776d02010-06-23 11:30:07 +00002504 netif_err(efx, drv, efx->net_dev, "has been disabled\n");
Ben Hutchingsf4bd9542008-12-26 13:48:51 -08002505 efx->state = STATE_DISABLED;
Ben Hutchingsf4bd9542008-12-26 13:48:51 -08002506 } else {
Ben Hutchings62776d02010-06-23 11:30:07 +00002507 netif_dbg(efx, drv, efx->net_dev, "reset complete\n");
Ben Hutchingse4abce82011-05-16 18:51:24 +01002508 netif_device_attach(efx->net_dev);
Ben Hutchingsf4bd9542008-12-26 13:48:51 -08002509 }
Ben Hutchings8ceee662008-04-27 12:55:59 +01002510 return rc;
2511}
2512
Alexandre Rames626950d2013-01-14 17:20:22 +00002513/* Try recovery mechanisms.
2514 * For now only EEH is supported.
2515 * Returns 0 if the recovery mechanisms are unsuccessful.
2516 * Returns a non-zero value otherwise.
2517 */
Alexandre Ramesb28405b2013-03-21 16:41:43 +00002518int efx_try_recovery(struct efx_nic *efx)
Alexandre Rames626950d2013-01-14 17:20:22 +00002519{
2520#ifdef CONFIG_EEH
2521 /* A PCI error can occur and not be seen by EEH because nothing
2522 * happens on the PCI bus. In this case the driver may fail and
2523 * schedule a 'recover or reset', leading to this recovery handler.
2524 * Manually call the eeh failure check function.
2525 */
2526 struct eeh_dev *eehdev =
2527 of_node_to_eeh_dev(pci_device_to_OF_node(efx->pci_dev));
2528
2529 if (eeh_dev_check_failure(eehdev)) {
2530 /* The EEH mechanisms will handle the error and reset the
2531 * device if necessary.
2532 */
2533 return 1;
2534 }
2535#endif
2536 return 0;
2537}
2538
Jon Cooper74cd60a2013-09-16 14:18:51 +01002539static void efx_wait_for_bist_end(struct efx_nic *efx)
2540{
2541 int i;
2542
2543 for (i = 0; i < BIST_WAIT_DELAY_COUNT; ++i) {
2544 if (efx_mcdi_poll_reboot(efx))
2545 goto out;
2546 msleep(BIST_WAIT_DELAY_MS);
2547 }
2548
2549 netif_err(efx, drv, efx->net_dev, "Warning: No MC reboot after BIST mode\n");
2550out:
2551 /* Either way unset the BIST flag. If we found no reboot we probably
2552 * won't recover, but we should try.
2553 */
2554 efx->mc_bist_for_other_fn = false;
2555}
2556
Ben Hutchings8ceee662008-04-27 12:55:59 +01002557/* The worker thread exists so that code that cannot sleep can
2558 * schedule a reset for later.
2559 */
2560static void efx_reset_work(struct work_struct *data)
2561{
Ben Hutchingseb9f6742009-11-29 03:43:15 +00002562 struct efx_nic *efx = container_of(data, struct efx_nic, reset_work);
Alexandre Rames626950d2013-01-14 17:20:22 +00002563 unsigned long pending;
2564 enum reset_type method;
2565
2566 pending = ACCESS_ONCE(efx->reset_pending);
2567 method = fls(pending) - 1;
2568
Jon Cooper74cd60a2013-09-16 14:18:51 +01002569 if (method == RESET_TYPE_MC_BIST)
2570 efx_wait_for_bist_end(efx);
2571
Alexandre Rames626950d2013-01-14 17:20:22 +00002572 if ((method == RESET_TYPE_RECOVER_OR_DISABLE ||
2573 method == RESET_TYPE_RECOVER_OR_ALL) &&
2574 efx_try_recovery(efx))
2575 return;
Ben Hutchings8ceee662008-04-27 12:55:59 +01002576
Ben Hutchingsa7d529a2011-06-24 20:46:31 +01002577 if (!pending)
Steve Hodgson319ba642010-06-01 11:17:24 +00002578 return;
2579
Ben Hutchingseb9f6742009-11-29 03:43:15 +00002580 rtnl_lock();
Ben Hutchings7153f622012-07-27 20:50:52 +01002581
2582 /* We checked the state in efx_schedule_reset() but it may
2583 * have changed by now. Now that we have the RTNL lock,
2584 * it cannot change again.
2585 */
2586 if (efx->state == STATE_READY)
Alexandre Rames626950d2013-01-14 17:20:22 +00002587 (void)efx_reset(efx, method);
Ben Hutchings7153f622012-07-27 20:50:52 +01002588
Ben Hutchingseb9f6742009-11-29 03:43:15 +00002589 rtnl_unlock();
Ben Hutchings8ceee662008-04-27 12:55:59 +01002590}
2591
2592void efx_schedule_reset(struct efx_nic *efx, enum reset_type type)
2593{
2594 enum reset_type method;
2595
Alexandre Rames626950d2013-01-14 17:20:22 +00002596 if (efx->state == STATE_RECOVERY) {
2597 netif_dbg(efx, drv, efx->net_dev,
2598 "recovering: skip scheduling %s reset\n",
2599 RESET_TYPE(type));
2600 return;
2601 }
2602
Ben Hutchings8ceee662008-04-27 12:55:59 +01002603 switch (type) {
2604 case RESET_TYPE_INVISIBLE:
2605 case RESET_TYPE_ALL:
Alexandre Rames626950d2013-01-14 17:20:22 +00002606 case RESET_TYPE_RECOVER_OR_ALL:
Ben Hutchings8ceee662008-04-27 12:55:59 +01002607 case RESET_TYPE_WORLD:
2608 case RESET_TYPE_DISABLE:
Alexandre Rames626950d2013-01-14 17:20:22 +00002609 case RESET_TYPE_RECOVER_OR_DISABLE:
Jon Cooper74cd60a2013-09-16 14:18:51 +01002610 case RESET_TYPE_MC_BIST:
Edward Creee2835462014-04-16 19:27:48 +01002611 case RESET_TYPE_MCDI_TIMEOUT:
Ben Hutchings8ceee662008-04-27 12:55:59 +01002612 method = type;
Ben Hutchings0e2a9c72011-06-24 20:50:07 +01002613 netif_dbg(efx, drv, efx->net_dev, "scheduling %s reset\n",
2614 RESET_TYPE(method));
Ben Hutchings8ceee662008-04-27 12:55:59 +01002615 break;
Ben Hutchings8ceee662008-04-27 12:55:59 +01002616 default:
Ben Hutchings0e2a9c72011-06-24 20:50:07 +01002617 method = efx->type->map_reset_reason(type);
Ben Hutchings62776d02010-06-23 11:30:07 +00002618 netif_dbg(efx, drv, efx->net_dev,
2619 "scheduling %s reset for %s\n",
2620 RESET_TYPE(method), RESET_TYPE(type));
Ben Hutchings0e2a9c72011-06-24 20:50:07 +01002621 break;
2622 }
Ben Hutchings8ceee662008-04-27 12:55:59 +01002623
Ben Hutchingsa7d529a2011-06-24 20:46:31 +01002624 set_bit(method, &efx->reset_pending);
Ben Hutchings7153f622012-07-27 20:50:52 +01002625 smp_mb(); /* ensure we change reset_pending before checking state */
2626
2627 /* If we're not READY then just leave the flags set as the cue
2628 * to abort probing or reschedule the reset later.
2629 */
2630 if (ACCESS_ONCE(efx->state) != STATE_READY)
2631 return;
Ben Hutchings8ceee662008-04-27 12:55:59 +01002632
Ben Hutchings8880f4e2009-11-29 15:15:41 +00002633 /* efx_process_channel() will no longer read events once a
2634 * reset is scheduled. So switch back to poll'd MCDI completions. */
2635 efx_mcdi_mode_poll(efx);
2636
Steve Hodgson1ab00622008-12-12 21:33:02 -08002637 queue_work(reset_workqueue, &efx->reset_work);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002638}
2639
2640/**************************************************************************
2641 *
2642 * List of NICs we support
2643 *
2644 **************************************************************************/
2645
2646/* PCI device ID table */
Benoit Taine9baa3c32014-08-08 15:56:03 +02002647static const struct pci_device_id efx_pci_table[] = {
Linus Torvalds0e59e7e72011-10-28 14:20:44 -07002648 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE,
2649 PCI_DEVICE_ID_SOLARFLARE_SFC4000A_0),
Ben Hutchingsdaeda632009-11-28 05:36:04 +00002650 .driver_data = (unsigned long) &falcon_a1_nic_type},
Linus Torvalds0e59e7e72011-10-28 14:20:44 -07002651 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE,
2652 PCI_DEVICE_ID_SOLARFLARE_SFC4000B),
Ben Hutchingsdaeda632009-11-28 05:36:04 +00002653 .driver_data = (unsigned long) &falcon_b0_nic_type},
Ben Hutchings547c4742011-12-02 18:23:56 +00002654 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0803), /* SFC9020 */
Ben Hutchings8880f4e2009-11-29 15:15:41 +00002655 .driver_data = (unsigned long) &siena_a0_nic_type},
Ben Hutchings547c4742011-12-02 18:23:56 +00002656 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0813), /* SFL9021 */
Ben Hutchings8880f4e2009-11-29 15:15:41 +00002657 .driver_data = (unsigned long) &siena_a0_nic_type},
Ben Hutchings8127d662013-08-29 19:19:29 +01002658 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0903), /* SFC9120 PF */
2659 .driver_data = (unsigned long) &efx_hunt_a0_nic_type},
Mateusz Wrzesinski3b06a002014-07-14 08:38:49 +01002660 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0923), /* SFC9140 PF */
2661 .driver_data = (unsigned long) &efx_hunt_a0_nic_type},
Ben Hutchings8ceee662008-04-27 12:55:59 +01002662 {0} /* end of list */
2663};
2664
2665/**************************************************************************
2666 *
Ben Hutchings37594332009-11-23 16:05:45 +00002667 * Dummy PHY/MAC operations
Ben Hutchings8ceee662008-04-27 12:55:59 +01002668 *
Ben Hutchings01aad7b2008-09-01 12:48:36 +01002669 * Can be used for some unimplemented operations
Ben Hutchings8ceee662008-04-27 12:55:59 +01002670 * Needed so all function pointers are valid and do not have to be tested
2671 * before use
2672 *
2673 **************************************************************************/
2674int efx_port_dummy_op_int(struct efx_nic *efx)
2675{
2676 return 0;
2677}
2678void efx_port_dummy_op_void(struct efx_nic *efx) {}
stephen hemmingerd2156972010-10-18 05:27:31 +00002679
2680static bool efx_port_dummy_op_poll(struct efx_nic *efx)
Steve Hodgsonfdaa9ae2009-11-28 05:34:05 +00002681{
2682 return false;
2683}
Ben Hutchings8ceee662008-04-27 12:55:59 +01002684
stephen hemminger6c8c2512011-04-14 05:50:12 +00002685static const struct efx_phy_operations efx_dummy_phy_operations = {
Ben Hutchings8ceee662008-04-27 12:55:59 +01002686 .init = efx_port_dummy_op_int,
Ben Hutchingsd3245b22009-11-29 03:42:41 +00002687 .reconfigure = efx_port_dummy_op_int,
Steve Hodgsonfdaa9ae2009-11-28 05:34:05 +00002688 .poll = efx_port_dummy_op_poll,
Ben Hutchings8ceee662008-04-27 12:55:59 +01002689 .fini = efx_port_dummy_op_void,
Ben Hutchings8ceee662008-04-27 12:55:59 +01002690};
2691
Ben Hutchings8ceee662008-04-27 12:55:59 +01002692/**************************************************************************
2693 *
2694 * Data housekeeping
2695 *
2696 **************************************************************************/
2697
2698/* This zeroes out and then fills in the invariants in a struct
2699 * efx_nic (including all sub-structures).
2700 */
Ben Hutchingsadeb15a2012-08-02 01:39:38 +01002701static int efx_init_struct(struct efx_nic *efx,
Ben Hutchings8ceee662008-04-27 12:55:59 +01002702 struct pci_dev *pci_dev, struct net_device *net_dev)
2703{
Ben Hutchings46426102010-09-10 06:42:33 +00002704 int i;
Ben Hutchings8ceee662008-04-27 12:55:59 +01002705
2706 /* Initialise common structures */
Ben Hutchings0bcf4a62013-10-18 19:21:45 +01002707 INIT_LIST_HEAD(&efx->node);
2708 INIT_LIST_HEAD(&efx->secondary_list);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002709 spin_lock_init(&efx->biu_lock);
Ben Hutchings76884832009-11-29 15:10:44 +00002710#ifdef CONFIG_SFC_MTD
2711 INIT_LIST_HEAD(&efx->mtd_list);
2712#endif
Ben Hutchings8ceee662008-04-27 12:55:59 +01002713 INIT_WORK(&efx->reset_work, efx_reset_work);
2714 INIT_DELAYED_WORK(&efx->monitor_work, efx_monitor);
Ben Hutchingsdd407812012-02-28 23:40:21 +00002715 INIT_DELAYED_WORK(&efx->selftest_work, efx_selftest_async_work);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002716 efx->pci_dev = pci_dev;
Ben Hutchings62776d02010-06-23 11:30:07 +00002717 efx->msg_enable = debug;
Ben Hutchingsf16aeea2012-07-27 19:31:16 +01002718 efx->state = STATE_UNINIT;
Ben Hutchings8ceee662008-04-27 12:55:59 +01002719 strlcpy(efx->name, pci_name(pci_dev), sizeof(efx->name));
Ben Hutchings8ceee662008-04-27 12:55:59 +01002720
2721 efx->net_dev = net_dev;
Jon Cooper43a37392012-10-18 15:49:54 +01002722 efx->rx_prefix_size = efx->type->rx_prefix_size;
Andrew Rybchenko2ec03012013-11-16 11:02:27 +04002723 efx->rx_ip_align =
2724 NET_IP_ALIGN ? (efx->rx_prefix_size + NET_IP_ALIGN) % 4 : 0;
Jon Cooper43a37392012-10-18 15:49:54 +01002725 efx->rx_packet_hash_offset =
2726 efx->type->rx_hash_offset - efx->type->rx_prefix_size;
Jon Cooperbd9a2652013-11-18 12:54:41 +00002727 efx->rx_packet_ts_offset =
2728 efx->type->rx_ts_offset - efx->type->rx_prefix_size;
Ben Hutchings8ceee662008-04-27 12:55:59 +01002729 spin_lock_init(&efx->stats_lock);
2730 mutex_init(&efx->mac_lock);
2731 efx->phy_op = &efx_dummy_phy_operations;
Ben Hutchings68e7f452009-04-29 08:05:08 +00002732 efx->mdio.dev = net_dev;
Ben Hutchings766ca0f2008-12-12 21:59:24 -08002733 INIT_WORK(&efx->mac_work, efx_mac_work);
Ben Hutchings9f2cb712012-02-08 00:11:20 +00002734 init_waitqueue_head(&efx->flush_wq);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002735
2736 for (i = 0; i < EFX_MAX_CHANNELS; i++) {
Ben Hutchings46426102010-09-10 06:42:33 +00002737 efx->channel[i] = efx_alloc_channel(efx, i, NULL);
2738 if (!efx->channel[i])
2739 goto fail;
Ben Hutchingsd8291182012-10-05 23:35:41 +01002740 efx->msi_context[i].efx = efx;
2741 efx->msi_context[i].index = i;
Ben Hutchings8ceee662008-04-27 12:55:59 +01002742 }
2743
Ben Hutchings8ceee662008-04-27 12:55:59 +01002744 /* Higher numbered interrupt modes are less capable! */
2745 efx->interrupt_mode = max(efx->type->max_interrupt_mode,
2746 interrupt_mode);
2747
Ben Hutchings6977dc62008-12-26 13:44:39 -08002748 /* Would be good to use the net_dev name, but we're too early */
2749 snprintf(efx->workqueue_name, sizeof(efx->workqueue_name), "sfc%s",
2750 pci_name(pci_dev));
2751 efx->workqueue = create_singlethread_workqueue(efx->workqueue_name);
Steve Hodgson1ab00622008-12-12 21:33:02 -08002752 if (!efx->workqueue)
Ben Hutchings46426102010-09-10 06:42:33 +00002753 goto fail;
Ben Hutchings8d9853d2008-07-18 19:01:20 +01002754
Ben Hutchings8ceee662008-04-27 12:55:59 +01002755 return 0;
Ben Hutchings46426102010-09-10 06:42:33 +00002756
2757fail:
2758 efx_fini_struct(efx);
2759 return -ENOMEM;
Ben Hutchings8ceee662008-04-27 12:55:59 +01002760}
2761
2762static void efx_fini_struct(struct efx_nic *efx)
2763{
Ben Hutchings8313aca2010-09-10 06:41:57 +00002764 int i;
2765
2766 for (i = 0; i < EFX_MAX_CHANNELS; i++)
2767 kfree(efx->channel[i]);
2768
Ben Hutchingsef215e62013-12-05 20:13:22 +00002769 kfree(efx->vpd_sn);
2770
Ben Hutchings8ceee662008-04-27 12:55:59 +01002771 if (efx->workqueue) {
2772 destroy_workqueue(efx->workqueue);
2773 efx->workqueue = NULL;
2774 }
2775}
2776
Edward Creee4d112e2014-07-15 11:58:12 +01002777void efx_update_sw_stats(struct efx_nic *efx, u64 *stats)
2778{
2779 u64 n_rx_nodesc_trunc = 0;
2780 struct efx_channel *channel;
2781
2782 efx_for_each_channel(channel, efx)
2783 n_rx_nodesc_trunc += channel->n_rx_nodesc_trunc;
2784 stats[GENERIC_STAT_rx_nodesc_trunc] = n_rx_nodesc_trunc;
2785 stats[GENERIC_STAT_rx_noskb_drops] = atomic_read(&efx->n_rx_noskb_drops);
2786}
2787
Ben Hutchings8ceee662008-04-27 12:55:59 +01002788/**************************************************************************
2789 *
2790 * PCI interface
2791 *
2792 **************************************************************************/
2793
2794/* Main body of final NIC shutdown code
2795 * This is called only at module unload (or hotplug removal).
2796 */
2797static void efx_pci_remove_main(struct efx_nic *efx)
2798{
Ben Hutchings7153f622012-07-27 20:50:52 +01002799 /* Flush reset_work. It can no longer be scheduled since we
2800 * are not READY.
2801 */
2802 BUG_ON(efx->state == STATE_READY);
2803 cancel_work_sync(&efx->reset_work);
2804
Ben Hutchingsd8291182012-10-05 23:35:41 +01002805 efx_disable_interrupts(efx);
Ben Hutchings152b6a62009-11-29 03:43:56 +00002806 efx_nic_fini_interrupt(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002807 efx_fini_port(efx);
Ben Hutchingsef2b90e2009-11-29 03:42:31 +00002808 efx->type->fini(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002809 efx_fini_napi(efx);
2810 efx_remove_all(efx);
2811}
2812
2813/* Final NIC shutdown
2814 * This is called only at module unload (or hotplug removal).
2815 */
2816static void efx_pci_remove(struct pci_dev *pci_dev)
2817{
2818 struct efx_nic *efx;
2819
2820 efx = pci_get_drvdata(pci_dev);
2821 if (!efx)
2822 return;
2823
2824 /* Mark the NIC as fini, then stop the interface */
2825 rtnl_lock();
Ben Hutchings0bcf4a62013-10-18 19:21:45 +01002826 efx_dissociate(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002827 dev_close(efx->net_dev);
Ben Hutchingsd8291182012-10-05 23:35:41 +01002828 efx_disable_interrupts(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002829 rtnl_unlock();
2830
Shradha Shahd98a4ff2014-11-05 12:16:46 +00002831 efx->type->sriov_fini(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002832 efx_unregister_netdev(efx);
2833
Ben Hutchings7dde5962008-12-12 22:09:38 -08002834 efx_mtd_remove(efx);
2835
Ben Hutchings8ceee662008-04-27 12:55:59 +01002836 efx_pci_remove_main(efx);
2837
Ben Hutchings8ceee662008-04-27 12:55:59 +01002838 efx_fini_io(efx);
Ben Hutchings62776d02010-06-23 11:30:07 +00002839 netif_dbg(efx, drv, efx->net_dev, "shutdown successful\n");
Ben Hutchings8ceee662008-04-27 12:55:59 +01002840
Ben Hutchings8ceee662008-04-27 12:55:59 +01002841 efx_fini_struct(efx);
2842 free_netdev(efx->net_dev);
Alexandre Rames626950d2013-01-14 17:20:22 +00002843
2844 pci_disable_pcie_error_reporting(pci_dev);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002845};
2846
Ben Hutchings460eeaa2012-03-05 15:35:39 +00002847/* NIC VPD information
2848 * Called during probe to display the part number of the
2849 * installed NIC. VPD is potentially very large but this should
2850 * always appear within the first 512 bytes.
2851 */
2852#define SFC_VPD_LEN 512
Ben Hutchingsef215e62013-12-05 20:13:22 +00002853static void efx_probe_vpd_strings(struct efx_nic *efx)
Ben Hutchings460eeaa2012-03-05 15:35:39 +00002854{
2855 struct pci_dev *dev = efx->pci_dev;
2856 char vpd_data[SFC_VPD_LEN];
2857 ssize_t vpd_size;
Ben Hutchingsef215e62013-12-05 20:13:22 +00002858 int ro_start, ro_size, i, j;
Ben Hutchings460eeaa2012-03-05 15:35:39 +00002859
2860 /* Get the vpd data from the device */
2861 vpd_size = pci_read_vpd(dev, 0, sizeof(vpd_data), vpd_data);
2862 if (vpd_size <= 0) {
2863 netif_err(efx, drv, efx->net_dev, "Unable to read VPD\n");
2864 return;
2865 }
2866
2867 /* Get the Read only section */
Ben Hutchingsef215e62013-12-05 20:13:22 +00002868 ro_start = pci_vpd_find_tag(vpd_data, 0, vpd_size, PCI_VPD_LRDT_RO_DATA);
2869 if (ro_start < 0) {
Ben Hutchings460eeaa2012-03-05 15:35:39 +00002870 netif_err(efx, drv, efx->net_dev, "VPD Read-only not found\n");
2871 return;
2872 }
2873
Ben Hutchingsef215e62013-12-05 20:13:22 +00002874 ro_size = pci_vpd_lrdt_size(&vpd_data[ro_start]);
2875 j = ro_size;
2876 i = ro_start + PCI_VPD_LRDT_TAG_SIZE;
Ben Hutchings460eeaa2012-03-05 15:35:39 +00002877 if (i + j > vpd_size)
2878 j = vpd_size - i;
2879
2880 /* Get the Part number */
2881 i = pci_vpd_find_info_keyword(vpd_data, i, j, "PN");
2882 if (i < 0) {
2883 netif_err(efx, drv, efx->net_dev, "Part number not found\n");
2884 return;
2885 }
2886
2887 j = pci_vpd_info_field_size(&vpd_data[i]);
2888 i += PCI_VPD_INFO_FLD_HDR_SIZE;
2889 if (i + j > vpd_size) {
2890 netif_err(efx, drv, efx->net_dev, "Incomplete part number\n");
2891 return;
2892 }
2893
2894 netif_info(efx, drv, efx->net_dev,
2895 "Part Number : %.*s\n", j, &vpd_data[i]);
Ben Hutchingsef215e62013-12-05 20:13:22 +00002896
2897 i = ro_start + PCI_VPD_LRDT_TAG_SIZE;
2898 j = ro_size;
2899 i = pci_vpd_find_info_keyword(vpd_data, i, j, "SN");
2900 if (i < 0) {
2901 netif_err(efx, drv, efx->net_dev, "Serial number not found\n");
2902 return;
2903 }
2904
2905 j = pci_vpd_info_field_size(&vpd_data[i]);
2906 i += PCI_VPD_INFO_FLD_HDR_SIZE;
2907 if (i + j > vpd_size) {
2908 netif_err(efx, drv, efx->net_dev, "Incomplete serial number\n");
2909 return;
2910 }
2911
2912 efx->vpd_sn = kmalloc(j + 1, GFP_KERNEL);
2913 if (!efx->vpd_sn)
2914 return;
2915
2916 snprintf(efx->vpd_sn, j + 1, "%s", &vpd_data[i]);
Ben Hutchings460eeaa2012-03-05 15:35:39 +00002917}
2918
2919
Ben Hutchings8ceee662008-04-27 12:55:59 +01002920/* Main body of NIC initialisation
2921 * This is called at module load (or hotplug insertion, theoretically).
2922 */
2923static int efx_pci_probe_main(struct efx_nic *efx)
2924{
2925 int rc;
2926
2927 /* Do start-of-day initialisation */
2928 rc = efx_probe_all(efx);
2929 if (rc)
2930 goto fail1;
2931
Ben Hutchingse8f14992010-12-07 19:47:34 +00002932 efx_init_napi(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002933
Ben Hutchingsef2b90e2009-11-29 03:42:31 +00002934 rc = efx->type->init(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002935 if (rc) {
Ben Hutchings62776d02010-06-23 11:30:07 +00002936 netif_err(efx, probe, efx->net_dev,
2937 "failed to initialise NIC\n");
Ben Hutchings278c0622009-11-23 16:05:12 +00002938 goto fail3;
Ben Hutchings8ceee662008-04-27 12:55:59 +01002939 }
2940
2941 rc = efx_init_port(efx);
2942 if (rc) {
Ben Hutchings62776d02010-06-23 11:30:07 +00002943 netif_err(efx, probe, efx->net_dev,
2944 "failed to initialise port\n");
Ben Hutchings278c0622009-11-23 16:05:12 +00002945 goto fail4;
Ben Hutchings8ceee662008-04-27 12:55:59 +01002946 }
2947
Ben Hutchings152b6a62009-11-29 03:43:56 +00002948 rc = efx_nic_init_interrupt(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002949 if (rc)
Ben Hutchings278c0622009-11-23 16:05:12 +00002950 goto fail5;
Jon Cooper261e4d92013-04-15 18:51:54 +01002951 rc = efx_enable_interrupts(efx);
2952 if (rc)
2953 goto fail6;
Ben Hutchings8ceee662008-04-27 12:55:59 +01002954
2955 return 0;
2956
Jon Cooper261e4d92013-04-15 18:51:54 +01002957 fail6:
2958 efx_nic_fini_interrupt(efx);
Ben Hutchings278c0622009-11-23 16:05:12 +00002959 fail5:
Ben Hutchings8ceee662008-04-27 12:55:59 +01002960 efx_fini_port(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002961 fail4:
Ben Hutchingsef2b90e2009-11-29 03:42:31 +00002962 efx->type->fini(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002963 fail3:
2964 efx_fini_napi(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002965 efx_remove_all(efx);
2966 fail1:
2967 return rc;
2968}
2969
2970/* NIC initialisation
2971 *
2972 * This is called at module load (or hotplug insertion,
Ben Hutchings73ba7b62012-01-09 19:47:08 +00002973 * theoretically). It sets up PCI mappings, resets the NIC,
Ben Hutchings8ceee662008-04-27 12:55:59 +01002974 * sets up and registers the network devices with the kernel and hooks
2975 * the interrupt service routine. It does not prepare the device for
2976 * transmission; this is left to the first time one of the network
2977 * interfaces is brought up (i.e. efx_net_open).
2978 */
Bill Pemberton87d1fc12012-12-03 09:23:32 -05002979static int efx_pci_probe(struct pci_dev *pci_dev,
Greg Kroah-Hartman1dd06ae2012-12-06 14:30:56 +00002980 const struct pci_device_id *entry)
Ben Hutchings8ceee662008-04-27 12:55:59 +01002981{
Ben Hutchings8ceee662008-04-27 12:55:59 +01002982 struct net_device *net_dev;
2983 struct efx_nic *efx;
Ben Hutchingsfadac6a2011-11-19 00:35:47 +00002984 int rc;
Ben Hutchings8ceee662008-04-27 12:55:59 +01002985
2986 /* Allocate and initialise a struct net_device and struct efx_nic */
Ben Hutchings94b274b2011-01-10 21:18:20 +00002987 net_dev = alloc_etherdev_mqs(sizeof(*efx), EFX_MAX_CORE_TX_QUEUES,
2988 EFX_MAX_RX_QUEUES);
Ben Hutchings8ceee662008-04-27 12:55:59 +01002989 if (!net_dev)
2990 return -ENOMEM;
Ben Hutchingsadeb15a2012-08-02 01:39:38 +01002991 efx = netdev_priv(net_dev);
2992 efx->type = (const struct efx_nic_type *) entry->driver_data;
2993 net_dev->features |= (efx->type->offload_features | NETIF_F_SG |
Ben Hutchings97bc5412009-05-19 16:19:08 -07002994 NETIF_F_HIGHDMA | NETIF_F_TSO |
Ben Hutchingsabfe9032011-04-05 15:00:02 +01002995 NETIF_F_RXCSUM);
Ben Hutchingsadeb15a2012-08-02 01:39:38 +01002996 if (efx->type->offload_features & NETIF_F_V6_CSUM)
Ben Hutchings738a8f42009-11-29 15:16:05 +00002997 net_dev->features |= NETIF_F_TSO6;
Ben Hutchings285065632008-09-01 12:46:54 +01002998 /* Mask for features that also apply to VLAN devices */
2999 net_dev->vlan_features |= (NETIF_F_ALL_CSUM | NETIF_F_SG |
Ben Hutchingsabfe9032011-04-05 15:00:02 +01003000 NETIF_F_HIGHDMA | NETIF_F_ALL_TSO |
3001 NETIF_F_RXCSUM);
3002 /* All offloads can be toggled */
3003 net_dev->hw_features = net_dev->features & ~NETIF_F_HIGHDMA;
Ben Hutchings8ceee662008-04-27 12:55:59 +01003004 pci_set_drvdata(pci_dev, efx);
Ben Hutchings62776d02010-06-23 11:30:07 +00003005 SET_NETDEV_DEV(net_dev, &pci_dev->dev);
Ben Hutchingsadeb15a2012-08-02 01:39:38 +01003006 rc = efx_init_struct(efx, pci_dev, net_dev);
Ben Hutchings8ceee662008-04-27 12:55:59 +01003007 if (rc)
3008 goto fail1;
3009
Ben Hutchings62776d02010-06-23 11:30:07 +00003010 netif_info(efx, probe, efx->net_dev,
Ben Hutchingsff79c8a2011-07-13 16:21:24 +01003011 "Solarflare NIC detected\n");
Ben Hutchings8ceee662008-04-27 12:55:59 +01003012
Ben Hutchingsef215e62013-12-05 20:13:22 +00003013 efx_probe_vpd_strings(efx);
Ben Hutchings460eeaa2012-03-05 15:35:39 +00003014
Ben Hutchings8ceee662008-04-27 12:55:59 +01003015 /* Set up basic I/O (BAR mappings etc) */
3016 rc = efx_init_io(efx);
3017 if (rc)
3018 goto fail2;
3019
Ben Hutchingsfadac6a2011-11-19 00:35:47 +00003020 rc = efx_pci_probe_main(efx);
Ben Hutchingsfadac6a2011-11-19 00:35:47 +00003021 if (rc)
3022 goto fail3;
Steve Hodgsonfa402b22008-12-12 22:08:16 -08003023
Ben Hutchings8ceee662008-04-27 12:55:59 +01003024 rc = efx_register_netdev(efx);
3025 if (rc)
Ben Hutchingsfadac6a2011-11-19 00:35:47 +00003026 goto fail4;
Ben Hutchings8ceee662008-04-27 12:55:59 +01003027
Shradha Shahd98a4ff2014-11-05 12:16:46 +00003028 rc = efx->type->sriov_init(efx);
Ben Hutchingscd2d5b52012-02-14 00:48:07 +00003029 if (rc)
3030 netif_err(efx, probe, efx->net_dev,
3031 "SR-IOV can't be enabled rc %d\n", rc);
3032
Ben Hutchings62776d02010-06-23 11:30:07 +00003033 netif_dbg(efx, probe, efx->net_dev, "initialisation successful\n");
Ben Hutchingsa5211bb2009-10-23 08:33:09 +00003034
Ben Hutchings7c431612012-01-27 17:23:58 +00003035 /* Try to create MTDs, but allow this to fail */
Ben Hutchingsa5211bb2009-10-23 08:33:09 +00003036 rtnl_lock();
Ben Hutchings7c431612012-01-27 17:23:58 +00003037 rc = efx_mtd_probe(efx);
Ben Hutchingsa5211bb2009-10-23 08:33:09 +00003038 rtnl_unlock();
Ben Hutchings7c431612012-01-27 17:23:58 +00003039 if (rc)
3040 netif_warn(efx, probe, efx->net_dev,
3041 "failed to create MTDs (%d)\n", rc);
3042
Alexandre Rames626950d2013-01-14 17:20:22 +00003043 rc = pci_enable_pcie_error_reporting(pci_dev);
3044 if (rc && rc != -EINVAL)
3045 netif_warn(efx, probe, efx->net_dev,
3046 "pci_enable_pcie_error_reporting failed (%d)\n", rc);
3047
Ben Hutchings8ceee662008-04-27 12:55:59 +01003048 return 0;
3049
Ben Hutchings8ceee662008-04-27 12:55:59 +01003050 fail4:
Ben Hutchingsfadac6a2011-11-19 00:35:47 +00003051 efx_pci_remove_main(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +01003052 fail3:
3053 efx_fini_io(efx);
3054 fail2:
3055 efx_fini_struct(efx);
3056 fail1:
Steve Hodgson5e2a9112010-02-12 12:32:27 -08003057 WARN_ON(rc > 0);
Ben Hutchings62776d02010-06-23 11:30:07 +00003058 netif_dbg(efx, drv, efx->net_dev, "initialisation failed. rc=%d\n", rc);
Ben Hutchings8ceee662008-04-27 12:55:59 +01003059 free_netdev(net_dev);
3060 return rc;
3061}
3062
Ben Hutchings89c758f2009-11-29 03:43:07 +00003063static int efx_pm_freeze(struct device *dev)
3064{
3065 struct efx_nic *efx = pci_get_drvdata(to_pci_dev(dev));
3066
Ben Hutchings61da0262012-07-27 19:35:39 +01003067 rtnl_lock();
3068
Ben Hutchings6032fb52012-07-27 19:35:47 +01003069 if (efx->state != STATE_DISABLED) {
3070 efx->state = STATE_UNINIT;
Ben Hutchings89c758f2009-11-29 03:43:07 +00003071
Daniel Pieczkoc2f3b8e2012-10-17 13:21:23 +01003072 efx_device_detach_sync(efx);
Ben Hutchings89c758f2009-11-29 03:43:07 +00003073
Ben Hutchings6032fb52012-07-27 19:35:47 +01003074 efx_stop_all(efx);
Ben Hutchingsd8291182012-10-05 23:35:41 +01003075 efx_disable_interrupts(efx);
Ben Hutchings6032fb52012-07-27 19:35:47 +01003076 }
Ben Hutchings89c758f2009-11-29 03:43:07 +00003077
Ben Hutchings61da0262012-07-27 19:35:39 +01003078 rtnl_unlock();
3079
Ben Hutchings89c758f2009-11-29 03:43:07 +00003080 return 0;
3081}
3082
3083static int efx_pm_thaw(struct device *dev)
3084{
Jon Cooper261e4d92013-04-15 18:51:54 +01003085 int rc;
Ben Hutchings89c758f2009-11-29 03:43:07 +00003086 struct efx_nic *efx = pci_get_drvdata(to_pci_dev(dev));
3087
Ben Hutchings61da0262012-07-27 19:35:39 +01003088 rtnl_lock();
3089
Ben Hutchings6032fb52012-07-27 19:35:47 +01003090 if (efx->state != STATE_DISABLED) {
Jon Cooper261e4d92013-04-15 18:51:54 +01003091 rc = efx_enable_interrupts(efx);
3092 if (rc)
3093 goto fail;
Ben Hutchings89c758f2009-11-29 03:43:07 +00003094
Ben Hutchings6032fb52012-07-27 19:35:47 +01003095 mutex_lock(&efx->mac_lock);
3096 efx->phy_op->reconfigure(efx);
3097 mutex_unlock(&efx->mac_lock);
Ben Hutchings89c758f2009-11-29 03:43:07 +00003098
Ben Hutchings6032fb52012-07-27 19:35:47 +01003099 efx_start_all(efx);
Ben Hutchings89c758f2009-11-29 03:43:07 +00003100
Ben Hutchings6032fb52012-07-27 19:35:47 +01003101 netif_device_attach(efx->net_dev);
Ben Hutchings89c758f2009-11-29 03:43:07 +00003102
Ben Hutchings6032fb52012-07-27 19:35:47 +01003103 efx->state = STATE_READY;
Ben Hutchings89c758f2009-11-29 03:43:07 +00003104
Ben Hutchings6032fb52012-07-27 19:35:47 +01003105 efx->type->resume_wol(efx);
3106 }
Ben Hutchings89c758f2009-11-29 03:43:07 +00003107
Ben Hutchings61da0262012-07-27 19:35:39 +01003108 rtnl_unlock();
3109
Steve Hodgson319ba642010-06-01 11:17:24 +00003110 /* Reschedule any quenched resets scheduled during efx_pm_freeze() */
3111 queue_work(reset_workqueue, &efx->reset_work);
3112
Ben Hutchings89c758f2009-11-29 03:43:07 +00003113 return 0;
Jon Cooper261e4d92013-04-15 18:51:54 +01003114
3115fail:
3116 rtnl_unlock();
3117
3118 return rc;
Ben Hutchings89c758f2009-11-29 03:43:07 +00003119}
3120
3121static int efx_pm_poweroff(struct device *dev)
3122{
3123 struct pci_dev *pci_dev = to_pci_dev(dev);
3124 struct efx_nic *efx = pci_get_drvdata(pci_dev);
3125
3126 efx->type->fini(efx);
3127
Ben Hutchingsa7d529a2011-06-24 20:46:31 +01003128 efx->reset_pending = 0;
Ben Hutchings89c758f2009-11-29 03:43:07 +00003129
3130 pci_save_state(pci_dev);
3131 return pci_set_power_state(pci_dev, PCI_D3hot);
3132}
3133
3134/* Used for both resume and restore */
3135static int efx_pm_resume(struct device *dev)
3136{
3137 struct pci_dev *pci_dev = to_pci_dev(dev);
3138 struct efx_nic *efx = pci_get_drvdata(pci_dev);
3139 int rc;
3140
3141 rc = pci_set_power_state(pci_dev, PCI_D0);
3142 if (rc)
3143 return rc;
3144 pci_restore_state(pci_dev);
3145 rc = pci_enable_device(pci_dev);
3146 if (rc)
3147 return rc;
3148 pci_set_master(efx->pci_dev);
3149 rc = efx->type->reset(efx, RESET_TYPE_ALL);
3150 if (rc)
3151 return rc;
3152 rc = efx->type->init(efx);
3153 if (rc)
3154 return rc;
Jon Cooper261e4d92013-04-15 18:51:54 +01003155 rc = efx_pm_thaw(dev);
3156 return rc;
Ben Hutchings89c758f2009-11-29 03:43:07 +00003157}
3158
3159static int efx_pm_suspend(struct device *dev)
3160{
3161 int rc;
3162
3163 efx_pm_freeze(dev);
3164 rc = efx_pm_poweroff(dev);
3165 if (rc)
3166 efx_pm_resume(dev);
3167 return rc;
3168}
3169
Ben Hutchings18e83e42012-01-05 19:05:20 +00003170static const struct dev_pm_ops efx_pm_ops = {
Ben Hutchings89c758f2009-11-29 03:43:07 +00003171 .suspend = efx_pm_suspend,
3172 .resume = efx_pm_resume,
3173 .freeze = efx_pm_freeze,
3174 .thaw = efx_pm_thaw,
3175 .poweroff = efx_pm_poweroff,
3176 .restore = efx_pm_resume,
3177};
3178
Alexandre Rames626950d2013-01-14 17:20:22 +00003179/* A PCI error affecting this device was detected.
3180 * At this point MMIO and DMA may be disabled.
3181 * Stop the software path and request a slot reset.
3182 */
stephen hemmingerdebd0032013-03-16 06:57:51 +00003183static pci_ers_result_t efx_io_error_detected(struct pci_dev *pdev,
3184 enum pci_channel_state state)
Alexandre Rames626950d2013-01-14 17:20:22 +00003185{
3186 pci_ers_result_t status = PCI_ERS_RESULT_RECOVERED;
3187 struct efx_nic *efx = pci_get_drvdata(pdev);
3188
3189 if (state == pci_channel_io_perm_failure)
3190 return PCI_ERS_RESULT_DISCONNECT;
3191
3192 rtnl_lock();
3193
3194 if (efx->state != STATE_DISABLED) {
3195 efx->state = STATE_RECOVERY;
3196 efx->reset_pending = 0;
3197
3198 efx_device_detach_sync(efx);
3199
3200 efx_stop_all(efx);
Ben Hutchingsd8291182012-10-05 23:35:41 +01003201 efx_disable_interrupts(efx);
Alexandre Rames626950d2013-01-14 17:20:22 +00003202
3203 status = PCI_ERS_RESULT_NEED_RESET;
3204 } else {
3205 /* If the interface is disabled we don't want to do anything
3206 * with it.
3207 */
3208 status = PCI_ERS_RESULT_RECOVERED;
3209 }
3210
3211 rtnl_unlock();
3212
3213 pci_disable_device(pdev);
3214
3215 return status;
3216}
3217
3218/* Fake a successfull reset, which will be performed later in efx_io_resume. */
stephen hemmingerdebd0032013-03-16 06:57:51 +00003219static pci_ers_result_t efx_io_slot_reset(struct pci_dev *pdev)
Alexandre Rames626950d2013-01-14 17:20:22 +00003220{
3221 struct efx_nic *efx = pci_get_drvdata(pdev);
3222 pci_ers_result_t status = PCI_ERS_RESULT_RECOVERED;
3223 int rc;
3224
3225 if (pci_enable_device(pdev)) {
3226 netif_err(efx, hw, efx->net_dev,
3227 "Cannot re-enable PCI device after reset.\n");
3228 status = PCI_ERS_RESULT_DISCONNECT;
3229 }
3230
3231 rc = pci_cleanup_aer_uncorrect_error_status(pdev);
3232 if (rc) {
3233 netif_err(efx, hw, efx->net_dev,
3234 "pci_cleanup_aer_uncorrect_error_status failed (%d)\n", rc);
3235 /* Non-fatal error. Continue. */
3236 }
3237
3238 return status;
3239}
3240
3241/* Perform the actual reset and resume I/O operations. */
3242static void efx_io_resume(struct pci_dev *pdev)
3243{
3244 struct efx_nic *efx = pci_get_drvdata(pdev);
3245 int rc;
3246
3247 rtnl_lock();
3248
3249 if (efx->state == STATE_DISABLED)
3250 goto out;
3251
3252 rc = efx_reset(efx, RESET_TYPE_ALL);
3253 if (rc) {
3254 netif_err(efx, hw, efx->net_dev,
3255 "efx_reset failed after PCI error (%d)\n", rc);
3256 } else {
3257 efx->state = STATE_READY;
3258 netif_dbg(efx, hw, efx->net_dev,
3259 "Done resetting and resuming IO after PCI error.\n");
3260 }
3261
3262out:
3263 rtnl_unlock();
3264}
3265
3266/* For simplicity and reliability, we always require a slot reset and try to
3267 * reset the hardware when a pci error affecting the device is detected.
3268 * We leave both the link_reset and mmio_enabled callback unimplemented:
3269 * with our request for slot reset the mmio_enabled callback will never be
3270 * called, and the link_reset callback is not used by AER or EEH mechanisms.
3271 */
3272static struct pci_error_handlers efx_err_handlers = {
3273 .error_detected = efx_io_error_detected,
3274 .slot_reset = efx_io_slot_reset,
3275 .resume = efx_io_resume,
3276};
3277
Ben Hutchings8ceee662008-04-27 12:55:59 +01003278static struct pci_driver efx_pci_driver = {
Ben Hutchingsc5d5f5f2010-06-23 11:30:26 +00003279 .name = KBUILD_MODNAME,
Ben Hutchings8ceee662008-04-27 12:55:59 +01003280 .id_table = efx_pci_table,
3281 .probe = efx_pci_probe,
3282 .remove = efx_pci_remove,
Ben Hutchings89c758f2009-11-29 03:43:07 +00003283 .driver.pm = &efx_pm_ops,
Alexandre Rames626950d2013-01-14 17:20:22 +00003284 .err_handler = &efx_err_handlers,
Ben Hutchings8ceee662008-04-27 12:55:59 +01003285};
3286
3287/**************************************************************************
3288 *
3289 * Kernel module interface
3290 *
3291 *************************************************************************/
3292
3293module_param(interrupt_mode, uint, 0444);
3294MODULE_PARM_DESC(interrupt_mode,
3295 "Interrupt mode (0=>MSIX 1=>MSI 2=>legacy)");
3296
3297static int __init efx_init_module(void)
3298{
3299 int rc;
3300
3301 printk(KERN_INFO "Solarflare NET driver v" EFX_DRIVER_VERSION "\n");
3302
3303 rc = register_netdevice_notifier(&efx_netdev_notifier);
3304 if (rc)
3305 goto err_notifier;
3306
Ben Hutchingscd2d5b52012-02-14 00:48:07 +00003307 rc = efx_init_sriov();
3308 if (rc)
3309 goto err_sriov;
3310
Steve Hodgson1ab00622008-12-12 21:33:02 -08003311 reset_workqueue = create_singlethread_workqueue("sfc_reset");
3312 if (!reset_workqueue) {
3313 rc = -ENOMEM;
3314 goto err_reset;
3315 }
Ben Hutchings8ceee662008-04-27 12:55:59 +01003316
3317 rc = pci_register_driver(&efx_pci_driver);
3318 if (rc < 0)
3319 goto err_pci;
3320
3321 return 0;
3322
3323 err_pci:
Steve Hodgson1ab00622008-12-12 21:33:02 -08003324 destroy_workqueue(reset_workqueue);
3325 err_reset:
Ben Hutchingscd2d5b52012-02-14 00:48:07 +00003326 efx_fini_sriov();
3327 err_sriov:
Ben Hutchings8ceee662008-04-27 12:55:59 +01003328 unregister_netdevice_notifier(&efx_netdev_notifier);
3329 err_notifier:
3330 return rc;
3331}
3332
3333static void __exit efx_exit_module(void)
3334{
3335 printk(KERN_INFO "Solarflare NET driver unloading\n");
3336
3337 pci_unregister_driver(&efx_pci_driver);
Steve Hodgson1ab00622008-12-12 21:33:02 -08003338 destroy_workqueue(reset_workqueue);
Ben Hutchingscd2d5b52012-02-14 00:48:07 +00003339 efx_fini_sriov();
Ben Hutchings8ceee662008-04-27 12:55:59 +01003340 unregister_netdevice_notifier(&efx_netdev_notifier);
3341
3342}
3343
3344module_init(efx_init_module);
3345module_exit(efx_exit_module);
3346
Ben Hutchings906bb262009-11-29 15:16:19 +00003347MODULE_AUTHOR("Solarflare Communications and "
3348 "Michael Brown <mbrown@fensystems.co.uk>");
Ben Hutchings6a350fd2014-02-12 19:00:07 +00003349MODULE_DESCRIPTION("Solarflare network driver");
Ben Hutchings8ceee662008-04-27 12:55:59 +01003350MODULE_LICENSE("GPL");
3351MODULE_DEVICE_TABLE(pci, efx_pci_table);