Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1 | /**************************************************************************** |
| 2 | * Driver for Solarflare Solarstorm network controllers and boards |
| 3 | * Copyright 2005-2006 Fen Systems Ltd. |
Ben Hutchings | 906bb26 | 2009-11-29 15:16:19 +0000 | [diff] [blame] | 4 | * Copyright 2005-2009 Solarflare Communications Inc. |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify it |
| 7 | * under the terms of the GNU General Public License version 2 as published |
| 8 | * by the Free Software Foundation, incorporated herein by reference. |
| 9 | */ |
| 10 | |
| 11 | #include <linux/module.h> |
| 12 | #include <linux/pci.h> |
| 13 | #include <linux/netdevice.h> |
| 14 | #include <linux/etherdevice.h> |
| 15 | #include <linux/delay.h> |
| 16 | #include <linux/notifier.h> |
| 17 | #include <linux/ip.h> |
| 18 | #include <linux/tcp.h> |
| 19 | #include <linux/in.h> |
| 20 | #include <linux/crc32.h> |
| 21 | #include <linux/ethtool.h> |
Ben Hutchings | aa6ef27 | 2008-07-18 19:03:10 +0100 | [diff] [blame] | 22 | #include <linux/topology.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 23 | #include <linux/gfp.h> |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 24 | #include "net_driver.h" |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 25 | #include "efx.h" |
| 26 | #include "mdio_10g.h" |
Ben Hutchings | 744093c | 2009-11-29 15:12:08 +0000 | [diff] [blame] | 27 | #include "nic.h" |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 28 | |
Ben Hutchings | 8880f4e | 2009-11-29 15:15:41 +0000 | [diff] [blame] | 29 | #include "mcdi.h" |
Steve Hodgson | fd371e3 | 2010-06-01 11:17:51 +0000 | [diff] [blame] | 30 | #include "workarounds.h" |
Ben Hutchings | 8880f4e | 2009-11-29 15:15:41 +0000 | [diff] [blame] | 31 | |
Ben Hutchings | c459302 | 2009-11-23 16:08:17 +0000 | [diff] [blame] | 32 | /************************************************************************** |
| 33 | * |
| 34 | * Type name strings |
| 35 | * |
| 36 | ************************************************************************** |
| 37 | */ |
| 38 | |
| 39 | /* Loopback mode names (see LOOPBACK_MODE()) */ |
| 40 | const unsigned int efx_loopback_mode_max = LOOPBACK_MAX; |
| 41 | const char *efx_loopback_mode_names[] = { |
| 42 | [LOOPBACK_NONE] = "NONE", |
Ben Hutchings | e58f69f | 2009-11-29 15:08:41 +0000 | [diff] [blame] | 43 | [LOOPBACK_DATA] = "DATAPATH", |
Ben Hutchings | c459302 | 2009-11-23 16:08:17 +0000 | [diff] [blame] | 44 | [LOOPBACK_GMAC] = "GMAC", |
| 45 | [LOOPBACK_XGMII] = "XGMII", |
| 46 | [LOOPBACK_XGXS] = "XGXS", |
| 47 | [LOOPBACK_XAUI] = "XAUI", |
Ben Hutchings | e58f69f | 2009-11-29 15:08:41 +0000 | [diff] [blame] | 48 | [LOOPBACK_GMII] = "GMII", |
| 49 | [LOOPBACK_SGMII] = "SGMII", |
| 50 | [LOOPBACK_XGBR] = "XGBR", |
| 51 | [LOOPBACK_XFI] = "XFI", |
| 52 | [LOOPBACK_XAUI_FAR] = "XAUI_FAR", |
| 53 | [LOOPBACK_GMII_FAR] = "GMII_FAR", |
| 54 | [LOOPBACK_SGMII_FAR] = "SGMII_FAR", |
| 55 | [LOOPBACK_XFI_FAR] = "XFI_FAR", |
Ben Hutchings | c459302 | 2009-11-23 16:08:17 +0000 | [diff] [blame] | 56 | [LOOPBACK_GPHY] = "GPHY", |
| 57 | [LOOPBACK_PHYXS] = "PHYXS", |
| 58 | [LOOPBACK_PCS] = "PCS", |
| 59 | [LOOPBACK_PMAPMD] = "PMA/PMD", |
Ben Hutchings | e58f69f | 2009-11-29 15:08:41 +0000 | [diff] [blame] | 60 | [LOOPBACK_XPORT] = "XPORT", |
| 61 | [LOOPBACK_XGMII_WS] = "XGMII_WS", |
| 62 | [LOOPBACK_XAUI_WS] = "XAUI_WS", |
| 63 | [LOOPBACK_XAUI_WS_FAR] = "XAUI_WS_FAR", |
| 64 | [LOOPBACK_XAUI_WS_NEAR] = "XAUI_WS_NEAR", |
| 65 | [LOOPBACK_GMII_WS] = "GMII_WS", |
| 66 | [LOOPBACK_XFI_WS] = "XFI_WS", |
| 67 | [LOOPBACK_XFI_WS_FAR] = "XFI_WS_FAR", |
| 68 | [LOOPBACK_PHYXS_WS] = "PHYXS_WS", |
Ben Hutchings | c459302 | 2009-11-23 16:08:17 +0000 | [diff] [blame] | 69 | }; |
| 70 | |
| 71 | /* Interrupt mode names (see INT_MODE())) */ |
| 72 | const unsigned int efx_interrupt_mode_max = EFX_INT_MODE_MAX; |
| 73 | const char *efx_interrupt_mode_names[] = { |
| 74 | [EFX_INT_MODE_MSIX] = "MSI-X", |
| 75 | [EFX_INT_MODE_MSI] = "MSI", |
| 76 | [EFX_INT_MODE_LEGACY] = "legacy", |
| 77 | }; |
| 78 | |
| 79 | const unsigned int efx_reset_type_max = RESET_TYPE_MAX; |
| 80 | const char *efx_reset_type_names[] = { |
| 81 | [RESET_TYPE_INVISIBLE] = "INVISIBLE", |
| 82 | [RESET_TYPE_ALL] = "ALL", |
| 83 | [RESET_TYPE_WORLD] = "WORLD", |
| 84 | [RESET_TYPE_DISABLE] = "DISABLE", |
| 85 | [RESET_TYPE_TX_WATCHDOG] = "TX_WATCHDOG", |
| 86 | [RESET_TYPE_INT_ERROR] = "INT_ERROR", |
| 87 | [RESET_TYPE_RX_RECOVERY] = "RX_RECOVERY", |
| 88 | [RESET_TYPE_RX_DESC_FETCH] = "RX_DESC_FETCH", |
| 89 | [RESET_TYPE_TX_DESC_FETCH] = "TX_DESC_FETCH", |
| 90 | [RESET_TYPE_TX_SKIP] = "TX_SKIP", |
Ben Hutchings | 8880f4e | 2009-11-29 15:15:41 +0000 | [diff] [blame] | 91 | [RESET_TYPE_MC_FAILURE] = "MC_FAILURE", |
Ben Hutchings | c459302 | 2009-11-23 16:08:17 +0000 | [diff] [blame] | 92 | }; |
| 93 | |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 94 | #define EFX_MAX_MTU (9 * 1024) |
| 95 | |
Steve Hodgson | 1ab0062 | 2008-12-12 21:33:02 -0800 | [diff] [blame] | 96 | /* Reset workqueue. If any NIC has a hardware failure then a reset will be |
| 97 | * queued onto this work queue. This is not a per-nic work queue, because |
| 98 | * efx_reset_work() acquires the rtnl lock, so resets are naturally serialised. |
| 99 | */ |
| 100 | static struct workqueue_struct *reset_workqueue; |
| 101 | |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 102 | /************************************************************************** |
| 103 | * |
| 104 | * Configurable values |
| 105 | * |
| 106 | *************************************************************************/ |
| 107 | |
| 108 | /* |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 109 | * Use separate channels for TX and RX events |
| 110 | * |
Neil Turton | 28b581a | 2008-12-12 21:41:06 -0800 | [diff] [blame] | 111 | * 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 Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 113 | * |
Neil Turton | 28b581a | 2008-12-12 21:41:06 -0800 | [diff] [blame] | 114 | * This is only used in MSI-X interrupt mode |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 115 | */ |
Neil Turton | 28b581a | 2008-12-12 21:41:06 -0800 | [diff] [blame] | 116 | static unsigned int separate_tx_channels; |
| 117 | module_param(separate_tx_channels, uint, 0644); |
| 118 | MODULE_PARM_DESC(separate_tx_channels, |
| 119 | "Use separate channels for TX and RX"); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 120 | |
| 121 | /* This is the weight assigned to each of the (per-channel) virtual |
| 122 | * NAPI devices. |
| 123 | */ |
| 124 | static int napi_weight = 64; |
| 125 | |
| 126 | /* This is the time (in jiffies) between invocations of the hardware |
| 127 | * monitor, which checks for known hardware bugs and resets the |
| 128 | * hardware and driver as necessary. |
| 129 | */ |
| 130 | unsigned int efx_monitor_interval = 1 * HZ; |
| 131 | |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 132 | /* This controls whether or not the driver will initialise devices |
| 133 | * with invalid MAC addresses stored in the EEPROM or flash. If true, |
| 134 | * such devices will be initialised with a random locally-generated |
| 135 | * MAC address. This allows for loading the sfc_mtd driver to |
| 136 | * reprogram the flash, even if the flash contents (including the MAC |
| 137 | * address) have previously been erased. |
| 138 | */ |
| 139 | static unsigned int allow_bad_hwaddr; |
| 140 | |
| 141 | /* Initial interrupt moderation settings. They can be modified after |
| 142 | * module load with ethtool. |
| 143 | * |
| 144 | * The default for RX should strike a balance between increasing the |
| 145 | * round-trip latency and reducing overhead. |
| 146 | */ |
| 147 | static unsigned int rx_irq_mod_usec = 60; |
| 148 | |
| 149 | /* Initial interrupt moderation settings. They can be modified after |
| 150 | * module load with ethtool. |
| 151 | * |
| 152 | * This default is chosen to ensure that a 10G link does not go idle |
| 153 | * while a TX queue is stopped after it has become full. A queue is |
| 154 | * restarted when it drops below half full. The time this takes (assuming |
| 155 | * worst case 3 descriptors per packet and 1024 descriptors) is |
| 156 | * 512 / 3 * 1.2 = 205 usec. |
| 157 | */ |
| 158 | static unsigned int tx_irq_mod_usec = 150; |
| 159 | |
| 160 | /* This is the first interrupt mode to try out of: |
| 161 | * 0 => MSI-X |
| 162 | * 1 => MSI |
| 163 | * 2 => legacy |
| 164 | */ |
| 165 | static unsigned int interrupt_mode; |
| 166 | |
| 167 | /* This is the requested number of CPUs to use for Receive-Side Scaling (RSS), |
| 168 | * i.e. the number of CPUs among which we may distribute simultaneous |
| 169 | * interrupt handling. |
| 170 | * |
| 171 | * Cards without MSI-X will only target one CPU via legacy or MSI interrupt. |
| 172 | * The default (0) means to assign an interrupt to each package (level II cache) |
| 173 | */ |
| 174 | static unsigned int rss_cpus; |
| 175 | module_param(rss_cpus, uint, 0444); |
| 176 | MODULE_PARM_DESC(rss_cpus, "Number of CPUs to use for Receive-Side Scaling"); |
| 177 | |
Ben Hutchings | 84ae48f | 2008-12-12 21:34:54 -0800 | [diff] [blame] | 178 | static int phy_flash_cfg; |
| 179 | module_param(phy_flash_cfg, int, 0644); |
| 180 | MODULE_PARM_DESC(phy_flash_cfg, "Set PHYs into reflash mode initially"); |
| 181 | |
Ben Hutchings | 6fb70fd | 2009-03-20 13:30:37 +0000 | [diff] [blame] | 182 | static unsigned irq_adapt_low_thresh = 10000; |
| 183 | module_param(irq_adapt_low_thresh, uint, 0644); |
| 184 | MODULE_PARM_DESC(irq_adapt_low_thresh, |
| 185 | "Threshold score for reducing IRQ moderation"); |
| 186 | |
| 187 | static unsigned irq_adapt_high_thresh = 20000; |
| 188 | module_param(irq_adapt_high_thresh, uint, 0644); |
| 189 | MODULE_PARM_DESC(irq_adapt_high_thresh, |
| 190 | "Threshold score for increasing IRQ moderation"); |
| 191 | |
Ben Hutchings | 62776d0 | 2010-06-23 11:30:07 +0000 | [diff] [blame] | 192 | static unsigned debug = (NETIF_MSG_DRV | NETIF_MSG_PROBE | |
| 193 | NETIF_MSG_LINK | NETIF_MSG_IFDOWN | |
| 194 | NETIF_MSG_IFUP | NETIF_MSG_RX_ERR | |
| 195 | NETIF_MSG_TX_ERR | NETIF_MSG_HW); |
| 196 | module_param(debug, uint, 0); |
| 197 | MODULE_PARM_DESC(debug, "Bitmapped debugging message enable value"); |
| 198 | |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 199 | /************************************************************************** |
| 200 | * |
| 201 | * Utility functions and prototypes |
| 202 | * |
| 203 | *************************************************************************/ |
| 204 | static void efx_remove_channel(struct efx_channel *channel); |
| 205 | static void efx_remove_port(struct efx_nic *efx); |
| 206 | static void efx_fini_napi(struct efx_nic *efx); |
| 207 | static void efx_fini_channels(struct efx_nic *efx); |
| 208 | |
| 209 | #define EFX_ASSERT_RESET_SERIALISED(efx) \ |
| 210 | do { \ |
Ben Hutchings | 332c1ce | 2009-11-25 16:08:52 +0000 | [diff] [blame] | 211 | if ((efx->state == STATE_RUNNING) || \ |
| 212 | (efx->state == STATE_DISABLED)) \ |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 213 | ASSERT_RTNL(); \ |
| 214 | } while (0) |
| 215 | |
| 216 | /************************************************************************** |
| 217 | * |
| 218 | * Event queue processing |
| 219 | * |
| 220 | *************************************************************************/ |
| 221 | |
| 222 | /* Process channel's event queue |
| 223 | * |
| 224 | * This function is responsible for processing the event queue of a |
| 225 | * single channel. The caller must guarantee that this function will |
| 226 | * never be concurrently called more than once on the same channel, |
| 227 | * though different channels may be being processed concurrently. |
| 228 | */ |
Ben Hutchings | fa236e1 | 2010-04-28 09:29:42 +0000 | [diff] [blame] | 229 | static int efx_process_channel(struct efx_channel *channel, int budget) |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 230 | { |
Ben Hutchings | 42cbe2d | 2008-09-01 12:48:08 +0100 | [diff] [blame] | 231 | struct efx_nic *efx = channel->efx; |
Ben Hutchings | fa236e1 | 2010-04-28 09:29:42 +0000 | [diff] [blame] | 232 | int spent; |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 233 | |
Ben Hutchings | 42cbe2d | 2008-09-01 12:48:08 +0100 | [diff] [blame] | 234 | if (unlikely(efx->reset_pending != RESET_TYPE_NONE || |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 235 | !channel->enabled)) |
Ben Hutchings | 42cbe2d | 2008-09-01 12:48:08 +0100 | [diff] [blame] | 236 | return 0; |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 237 | |
Ben Hutchings | fa236e1 | 2010-04-28 09:29:42 +0000 | [diff] [blame] | 238 | spent = efx_nic_process_eventq(channel, budget); |
| 239 | if (spent == 0) |
Ben Hutchings | 42cbe2d | 2008-09-01 12:48:08 +0100 | [diff] [blame] | 240 | return 0; |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 241 | |
| 242 | /* Deliver last RX packet. */ |
| 243 | if (channel->rx_pkt) { |
| 244 | __efx_rx_packet(channel, channel->rx_pkt, |
| 245 | channel->rx_pkt_csummed); |
| 246 | channel->rx_pkt = NULL; |
| 247 | } |
| 248 | |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 249 | efx_rx_strategy(channel); |
| 250 | |
Ben Hutchings | 42cbe2d | 2008-09-01 12:48:08 +0100 | [diff] [blame] | 251 | efx_fast_push_rx_descriptors(&efx->rx_queue[channel->channel]); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 252 | |
Ben Hutchings | fa236e1 | 2010-04-28 09:29:42 +0000 | [diff] [blame] | 253 | return spent; |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 254 | } |
| 255 | |
| 256 | /* Mark channel as finished processing |
| 257 | * |
| 258 | * Note that since we will not receive further interrupts for this |
| 259 | * channel before we finish processing and call the eventq_read_ack() |
| 260 | * method, there is no need to use the interrupt hold-off timers. |
| 261 | */ |
| 262 | static inline void efx_channel_processed(struct efx_channel *channel) |
| 263 | { |
Ben Hutchings | 5b9e207 | 2008-05-16 21:18:14 +0100 | [diff] [blame] | 264 | /* The interrupt handler for this channel may set work_pending |
| 265 | * as soon as we acknowledge the events we've seen. Make sure |
| 266 | * it's cleared before then. */ |
Ben Hutchings | dc8cfa5 | 2008-09-01 12:46:50 +0100 | [diff] [blame] | 267 | channel->work_pending = false; |
Ben Hutchings | 5b9e207 | 2008-05-16 21:18:14 +0100 | [diff] [blame] | 268 | smp_wmb(); |
| 269 | |
Ben Hutchings | 152b6a6 | 2009-11-29 03:43:56 +0000 | [diff] [blame] | 270 | efx_nic_eventq_read_ack(channel); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 271 | } |
| 272 | |
| 273 | /* NAPI poll handler |
| 274 | * |
| 275 | * NAPI guarantees serialisation of polls of the same device, which |
| 276 | * provides the guarantee required by efx_process_channel(). |
| 277 | */ |
| 278 | static int efx_poll(struct napi_struct *napi, int budget) |
| 279 | { |
| 280 | struct efx_channel *channel = |
| 281 | container_of(napi, struct efx_channel, napi_str); |
Ben Hutchings | 62776d0 | 2010-06-23 11:30:07 +0000 | [diff] [blame] | 282 | struct efx_nic *efx = channel->efx; |
Ben Hutchings | fa236e1 | 2010-04-28 09:29:42 +0000 | [diff] [blame] | 283 | int spent; |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 284 | |
Ben Hutchings | 62776d0 | 2010-06-23 11:30:07 +0000 | [diff] [blame] | 285 | netif_vdbg(efx, intr, efx->net_dev, |
| 286 | "channel %d NAPI poll executing on CPU %d\n", |
| 287 | channel->channel, raw_smp_processor_id()); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 288 | |
Ben Hutchings | fa236e1 | 2010-04-28 09:29:42 +0000 | [diff] [blame] | 289 | spent = efx_process_channel(channel, budget); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 290 | |
Ben Hutchings | fa236e1 | 2010-04-28 09:29:42 +0000 | [diff] [blame] | 291 | if (spent < budget) { |
Ben Hutchings | a4900ac | 2010-04-28 09:30:43 +0000 | [diff] [blame] | 292 | if (channel->channel < efx->n_rx_channels && |
Ben Hutchings | 6fb70fd | 2009-03-20 13:30:37 +0000 | [diff] [blame] | 293 | efx->irq_rx_adaptive && |
| 294 | unlikely(++channel->irq_count == 1000)) { |
Ben Hutchings | 6fb70fd | 2009-03-20 13:30:37 +0000 | [diff] [blame] | 295 | if (unlikely(channel->irq_mod_score < |
| 296 | irq_adapt_low_thresh)) { |
Ben Hutchings | 0d86ebd | 2009-10-23 08:32:13 +0000 | [diff] [blame] | 297 | if (channel->irq_moderation > 1) { |
| 298 | channel->irq_moderation -= 1; |
Ben Hutchings | ef2b90e | 2009-11-29 03:42:31 +0000 | [diff] [blame] | 299 | efx->type->push_irq_moderation(channel); |
Ben Hutchings | 0d86ebd | 2009-10-23 08:32:13 +0000 | [diff] [blame] | 300 | } |
Ben Hutchings | 6fb70fd | 2009-03-20 13:30:37 +0000 | [diff] [blame] | 301 | } else if (unlikely(channel->irq_mod_score > |
| 302 | irq_adapt_high_thresh)) { |
Ben Hutchings | 0d86ebd | 2009-10-23 08:32:13 +0000 | [diff] [blame] | 303 | if (channel->irq_moderation < |
| 304 | efx->irq_rx_moderation) { |
| 305 | channel->irq_moderation += 1; |
Ben Hutchings | ef2b90e | 2009-11-29 03:42:31 +0000 | [diff] [blame] | 306 | efx->type->push_irq_moderation(channel); |
Ben Hutchings | 0d86ebd | 2009-10-23 08:32:13 +0000 | [diff] [blame] | 307 | } |
Ben Hutchings | 6fb70fd | 2009-03-20 13:30:37 +0000 | [diff] [blame] | 308 | } |
Ben Hutchings | 6fb70fd | 2009-03-20 13:30:37 +0000 | [diff] [blame] | 309 | channel->irq_count = 0; |
| 310 | channel->irq_mod_score = 0; |
| 311 | } |
| 312 | |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 313 | /* There is no race here; although napi_disable() will |
Ben Hutchings | 288379f | 2009-01-19 16:43:59 -0800 | [diff] [blame] | 314 | * only wait for napi_complete(), this isn't a problem |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 315 | * since efx_channel_processed() will have no effect if |
| 316 | * interrupts have already been disabled. |
| 317 | */ |
Ben Hutchings | 288379f | 2009-01-19 16:43:59 -0800 | [diff] [blame] | 318 | napi_complete(napi); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 319 | efx_channel_processed(channel); |
| 320 | } |
| 321 | |
Ben Hutchings | fa236e1 | 2010-04-28 09:29:42 +0000 | [diff] [blame] | 322 | return spent; |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 323 | } |
| 324 | |
| 325 | /* Process the eventq of the specified channel immediately on this CPU |
| 326 | * |
| 327 | * Disable hardware generated interrupts, wait for any existing |
| 328 | * processing to finish, then directly poll (and ack ) the eventq. |
| 329 | * Finally reenable NAPI and interrupts. |
| 330 | * |
| 331 | * Since we are touching interrupts the caller should hold the suspend lock |
| 332 | */ |
| 333 | void efx_process_channel_now(struct efx_channel *channel) |
| 334 | { |
| 335 | struct efx_nic *efx = channel->efx; |
| 336 | |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 337 | BUG_ON(!channel->enabled); |
| 338 | |
| 339 | /* Disable interrupts and wait for ISRs to complete */ |
Ben Hutchings | 152b6a6 | 2009-11-29 03:43:56 +0000 | [diff] [blame] | 340 | efx_nic_disable_interrupts(efx); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 341 | if (efx->legacy_irq) |
| 342 | synchronize_irq(efx->legacy_irq); |
Ben Hutchings | 64ee312 | 2008-09-01 12:47:38 +0100 | [diff] [blame] | 343 | if (channel->irq) |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 344 | synchronize_irq(channel->irq); |
| 345 | |
| 346 | /* Wait for any NAPI processing to complete */ |
| 347 | napi_disable(&channel->napi_str); |
| 348 | |
| 349 | /* Poll the channel */ |
Ben Hutchings | 3ffeabd | 2009-10-23 08:30:58 +0000 | [diff] [blame] | 350 | efx_process_channel(channel, EFX_EVQ_SIZE); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 351 | |
| 352 | /* Ack the eventq. This may cause an interrupt to be generated |
| 353 | * when they are reenabled */ |
| 354 | efx_channel_processed(channel); |
| 355 | |
| 356 | napi_enable(&channel->napi_str); |
Ben Hutchings | 152b6a6 | 2009-11-29 03:43:56 +0000 | [diff] [blame] | 357 | efx_nic_enable_interrupts(efx); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 358 | } |
| 359 | |
| 360 | /* Create event queue |
| 361 | * Event queue memory allocations are done only once. If the channel |
| 362 | * is reset, the memory buffer will be reused; this guards against |
| 363 | * errors during channel reset and also simplifies interrupt handling. |
| 364 | */ |
| 365 | static int efx_probe_eventq(struct efx_channel *channel) |
| 366 | { |
Ben Hutchings | 62776d0 | 2010-06-23 11:30:07 +0000 | [diff] [blame] | 367 | netif_dbg(channel->efx, probe, channel->efx->net_dev, |
| 368 | "chan %d create event queue\n", channel->channel); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 369 | |
Ben Hutchings | 152b6a6 | 2009-11-29 03:43:56 +0000 | [diff] [blame] | 370 | return efx_nic_probe_eventq(channel); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 371 | } |
| 372 | |
| 373 | /* Prepare channel's event queue */ |
Ben Hutchings | bc3c90a | 2008-09-01 12:48:46 +0100 | [diff] [blame] | 374 | static void efx_init_eventq(struct efx_channel *channel) |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 375 | { |
Ben Hutchings | 62776d0 | 2010-06-23 11:30:07 +0000 | [diff] [blame] | 376 | netif_dbg(channel->efx, drv, channel->efx->net_dev, |
| 377 | "chan %d init event queue\n", channel->channel); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 378 | |
| 379 | channel->eventq_read_ptr = 0; |
| 380 | |
Ben Hutchings | 152b6a6 | 2009-11-29 03:43:56 +0000 | [diff] [blame] | 381 | efx_nic_init_eventq(channel); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 382 | } |
| 383 | |
| 384 | static void efx_fini_eventq(struct efx_channel *channel) |
| 385 | { |
Ben Hutchings | 62776d0 | 2010-06-23 11:30:07 +0000 | [diff] [blame] | 386 | netif_dbg(channel->efx, drv, channel->efx->net_dev, |
| 387 | "chan %d fini event queue\n", channel->channel); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 388 | |
Ben Hutchings | 152b6a6 | 2009-11-29 03:43:56 +0000 | [diff] [blame] | 389 | efx_nic_fini_eventq(channel); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 390 | } |
| 391 | |
| 392 | static void efx_remove_eventq(struct efx_channel *channel) |
| 393 | { |
Ben Hutchings | 62776d0 | 2010-06-23 11:30:07 +0000 | [diff] [blame] | 394 | netif_dbg(channel->efx, drv, channel->efx->net_dev, |
| 395 | "chan %d remove event queue\n", channel->channel); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 396 | |
Ben Hutchings | 152b6a6 | 2009-11-29 03:43:56 +0000 | [diff] [blame] | 397 | efx_nic_remove_eventq(channel); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 398 | } |
| 399 | |
| 400 | /************************************************************************** |
| 401 | * |
| 402 | * Channel handling |
| 403 | * |
| 404 | *************************************************************************/ |
| 405 | |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 406 | static int efx_probe_channel(struct efx_channel *channel) |
| 407 | { |
| 408 | struct efx_tx_queue *tx_queue; |
| 409 | struct efx_rx_queue *rx_queue; |
| 410 | int rc; |
| 411 | |
Ben Hutchings | 62776d0 | 2010-06-23 11:30:07 +0000 | [diff] [blame] | 412 | netif_dbg(channel->efx, probe, channel->efx->net_dev, |
| 413 | "creating channel %d\n", channel->channel); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 414 | |
| 415 | rc = efx_probe_eventq(channel); |
| 416 | if (rc) |
| 417 | goto fail1; |
| 418 | |
| 419 | efx_for_each_channel_tx_queue(tx_queue, channel) { |
| 420 | rc = efx_probe_tx_queue(tx_queue); |
| 421 | if (rc) |
| 422 | goto fail2; |
| 423 | } |
| 424 | |
| 425 | efx_for_each_channel_rx_queue(rx_queue, channel) { |
| 426 | rc = efx_probe_rx_queue(rx_queue); |
| 427 | if (rc) |
| 428 | goto fail3; |
| 429 | } |
| 430 | |
| 431 | channel->n_rx_frm_trunc = 0; |
| 432 | |
| 433 | return 0; |
| 434 | |
| 435 | fail3: |
| 436 | efx_for_each_channel_rx_queue(rx_queue, channel) |
| 437 | efx_remove_rx_queue(rx_queue); |
| 438 | fail2: |
| 439 | efx_for_each_channel_tx_queue(tx_queue, channel) |
| 440 | efx_remove_tx_queue(tx_queue); |
| 441 | fail1: |
| 442 | return rc; |
| 443 | } |
| 444 | |
| 445 | |
Ben Hutchings | 56536e9 | 2008-12-12 21:37:02 -0800 | [diff] [blame] | 446 | static void efx_set_channel_names(struct efx_nic *efx) |
| 447 | { |
| 448 | struct efx_channel *channel; |
| 449 | const char *type = ""; |
| 450 | int number; |
| 451 | |
| 452 | efx_for_each_channel(channel, efx) { |
| 453 | number = channel->channel; |
Ben Hutchings | a4900ac | 2010-04-28 09:30:43 +0000 | [diff] [blame] | 454 | if (efx->n_channels > efx->n_rx_channels) { |
| 455 | if (channel->channel < efx->n_rx_channels) { |
Ben Hutchings | 56536e9 | 2008-12-12 21:37:02 -0800 | [diff] [blame] | 456 | type = "-rx"; |
| 457 | } else { |
| 458 | type = "-tx"; |
Ben Hutchings | a4900ac | 2010-04-28 09:30:43 +0000 | [diff] [blame] | 459 | number -= efx->n_rx_channels; |
Ben Hutchings | 56536e9 | 2008-12-12 21:37:02 -0800 | [diff] [blame] | 460 | } |
| 461 | } |
| 462 | snprintf(channel->name, sizeof(channel->name), |
| 463 | "%s%s-%d", efx->name, type, number); |
| 464 | } |
| 465 | } |
| 466 | |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 467 | /* Channels are shutdown and reinitialised whilst the NIC is running |
| 468 | * to propagate configuration changes (mtu, checksum offload), or |
| 469 | * to clear hardware error conditions |
| 470 | */ |
Ben Hutchings | bc3c90a | 2008-09-01 12:48:46 +0100 | [diff] [blame] | 471 | static void efx_init_channels(struct efx_nic *efx) |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 472 | { |
| 473 | struct efx_tx_queue *tx_queue; |
| 474 | struct efx_rx_queue *rx_queue; |
| 475 | struct efx_channel *channel; |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 476 | |
Ben Hutchings | f7f13b0 | 2008-05-16 21:15:06 +0100 | [diff] [blame] | 477 | /* Calculate the rx buffer allocation parameters required to |
| 478 | * support the current MTU, including padding for header |
| 479 | * alignment and overruns. |
| 480 | */ |
| 481 | efx->rx_buffer_len = (max(EFX_PAGE_IP_ALIGN, NET_IP_ALIGN) + |
| 482 | EFX_MAX_FRAME_LEN(efx->net_dev->mtu) + |
Ben Hutchings | 39c9cf0 | 2010-06-23 11:31:28 +0000 | [diff] [blame] | 483 | efx->type->rx_buffer_hash_size + |
Ben Hutchings | f7f13b0 | 2008-05-16 21:15:06 +0100 | [diff] [blame] | 484 | efx->type->rx_buffer_padding); |
Steve Hodgson | 62b330b | 2010-06-01 11:20:53 +0000 | [diff] [blame] | 485 | efx->rx_buffer_order = get_order(efx->rx_buffer_len + |
| 486 | sizeof(struct efx_rx_page_state)); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 487 | |
| 488 | /* Initialise the channels */ |
| 489 | efx_for_each_channel(channel, efx) { |
Ben Hutchings | 62776d0 | 2010-06-23 11:30:07 +0000 | [diff] [blame] | 490 | netif_dbg(channel->efx, drv, channel->efx->net_dev, |
| 491 | "init chan %d\n", channel->channel); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 492 | |
Ben Hutchings | bc3c90a | 2008-09-01 12:48:46 +0100 | [diff] [blame] | 493 | efx_init_eventq(channel); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 494 | |
Ben Hutchings | bc3c90a | 2008-09-01 12:48:46 +0100 | [diff] [blame] | 495 | efx_for_each_channel_tx_queue(tx_queue, channel) |
| 496 | efx_init_tx_queue(tx_queue); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 497 | |
| 498 | /* The rx buffer allocation strategy is MTU dependent */ |
| 499 | efx_rx_strategy(channel); |
| 500 | |
Ben Hutchings | bc3c90a | 2008-09-01 12:48:46 +0100 | [diff] [blame] | 501 | efx_for_each_channel_rx_queue(rx_queue, channel) |
| 502 | efx_init_rx_queue(rx_queue); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 503 | |
| 504 | WARN_ON(channel->rx_pkt != NULL); |
| 505 | efx_rx_strategy(channel); |
| 506 | } |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 507 | } |
| 508 | |
| 509 | /* This enables event queue processing and packet transmission. |
| 510 | * |
| 511 | * Note that this function is not allowed to fail, since that would |
| 512 | * introduce too much complexity into the suspend/resume path. |
| 513 | */ |
| 514 | static void efx_start_channel(struct efx_channel *channel) |
| 515 | { |
| 516 | struct efx_rx_queue *rx_queue; |
| 517 | |
Ben Hutchings | 62776d0 | 2010-06-23 11:30:07 +0000 | [diff] [blame] | 518 | netif_dbg(channel->efx, ifup, channel->efx->net_dev, |
| 519 | "starting chan %d\n", channel->channel); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 520 | |
Ben Hutchings | 5b9e207 | 2008-05-16 21:18:14 +0100 | [diff] [blame] | 521 | /* The interrupt handler for this channel may set work_pending |
| 522 | * as soon as we enable it. Make sure it's cleared before |
| 523 | * then. Similarly, make sure it sees the enabled flag set. */ |
Ben Hutchings | dc8cfa5 | 2008-09-01 12:46:50 +0100 | [diff] [blame] | 524 | channel->work_pending = false; |
| 525 | channel->enabled = true; |
Ben Hutchings | 5b9e207 | 2008-05-16 21:18:14 +0100 | [diff] [blame] | 526 | smp_wmb(); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 527 | |
Steve Hodgson | 90d683a | 2010-06-01 11:19:39 +0000 | [diff] [blame] | 528 | /* Fill the queues before enabling NAPI */ |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 529 | efx_for_each_channel_rx_queue(rx_queue, channel) |
| 530 | efx_fast_push_rx_descriptors(rx_queue); |
Steve Hodgson | 90d683a | 2010-06-01 11:19:39 +0000 | [diff] [blame] | 531 | |
| 532 | napi_enable(&channel->napi_str); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 533 | } |
| 534 | |
| 535 | /* This disables event queue processing and packet transmission. |
| 536 | * This function does not guarantee that all queue processing |
| 537 | * (e.g. RX refill) is complete. |
| 538 | */ |
| 539 | static void efx_stop_channel(struct efx_channel *channel) |
| 540 | { |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 541 | if (!channel->enabled) |
| 542 | return; |
| 543 | |
Ben Hutchings | 62776d0 | 2010-06-23 11:30:07 +0000 | [diff] [blame] | 544 | netif_dbg(channel->efx, ifdown, channel->efx->net_dev, |
| 545 | "stop chan %d\n", channel->channel); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 546 | |
Ben Hutchings | dc8cfa5 | 2008-09-01 12:46:50 +0100 | [diff] [blame] | 547 | channel->enabled = false; |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 548 | napi_disable(&channel->napi_str); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 549 | } |
| 550 | |
| 551 | static void efx_fini_channels(struct efx_nic *efx) |
| 552 | { |
| 553 | struct efx_channel *channel; |
| 554 | struct efx_tx_queue *tx_queue; |
| 555 | struct efx_rx_queue *rx_queue; |
Ben Hutchings | 6bc5d3a | 2008-09-01 12:49:37 +0100 | [diff] [blame] | 556 | int rc; |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 557 | |
| 558 | EFX_ASSERT_RESET_SERIALISED(efx); |
| 559 | BUG_ON(efx->port_enabled); |
| 560 | |
Ben Hutchings | 152b6a6 | 2009-11-29 03:43:56 +0000 | [diff] [blame] | 561 | rc = efx_nic_flush_queues(efx); |
Steve Hodgson | fd371e3 | 2010-06-01 11:17:51 +0000 | [diff] [blame] | 562 | if (rc && EFX_WORKAROUND_7803(efx)) { |
| 563 | /* Schedule a reset to recover from the flush failure. The |
| 564 | * descriptor caches reference memory we're about to free, |
| 565 | * but falcon_reconfigure_mac_wrapper() won't reconnect |
| 566 | * the MACs because of the pending reset. */ |
Ben Hutchings | 62776d0 | 2010-06-23 11:30:07 +0000 | [diff] [blame] | 567 | netif_err(efx, drv, efx->net_dev, |
| 568 | "Resetting to recover from flush failure\n"); |
Steve Hodgson | fd371e3 | 2010-06-01 11:17:51 +0000 | [diff] [blame] | 569 | efx_schedule_reset(efx, RESET_TYPE_ALL); |
| 570 | } else if (rc) { |
Ben Hutchings | 62776d0 | 2010-06-23 11:30:07 +0000 | [diff] [blame] | 571 | netif_err(efx, drv, efx->net_dev, "failed to flush queues\n"); |
Steve Hodgson | fd371e3 | 2010-06-01 11:17:51 +0000 | [diff] [blame] | 572 | } else { |
Ben Hutchings | 62776d0 | 2010-06-23 11:30:07 +0000 | [diff] [blame] | 573 | netif_dbg(efx, drv, efx->net_dev, |
| 574 | "successfully flushed all queues\n"); |
Steve Hodgson | fd371e3 | 2010-06-01 11:17:51 +0000 | [diff] [blame] | 575 | } |
Ben Hutchings | 6bc5d3a | 2008-09-01 12:49:37 +0100 | [diff] [blame] | 576 | |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 577 | efx_for_each_channel(channel, efx) { |
Ben Hutchings | 62776d0 | 2010-06-23 11:30:07 +0000 | [diff] [blame] | 578 | netif_dbg(channel->efx, drv, channel->efx->net_dev, |
| 579 | "shut down chan %d\n", channel->channel); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 580 | |
| 581 | efx_for_each_channel_rx_queue(rx_queue, channel) |
| 582 | efx_fini_rx_queue(rx_queue); |
| 583 | efx_for_each_channel_tx_queue(tx_queue, channel) |
| 584 | efx_fini_tx_queue(tx_queue); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 585 | efx_fini_eventq(channel); |
| 586 | } |
| 587 | } |
| 588 | |
| 589 | static void efx_remove_channel(struct efx_channel *channel) |
| 590 | { |
| 591 | struct efx_tx_queue *tx_queue; |
| 592 | struct efx_rx_queue *rx_queue; |
| 593 | |
Ben Hutchings | 62776d0 | 2010-06-23 11:30:07 +0000 | [diff] [blame] | 594 | netif_dbg(channel->efx, drv, channel->efx->net_dev, |
| 595 | "destroy chan %d\n", channel->channel); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 596 | |
| 597 | efx_for_each_channel_rx_queue(rx_queue, channel) |
| 598 | efx_remove_rx_queue(rx_queue); |
| 599 | efx_for_each_channel_tx_queue(tx_queue, channel) |
| 600 | efx_remove_tx_queue(tx_queue); |
| 601 | efx_remove_eventq(channel); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 602 | } |
| 603 | |
Steve Hodgson | 90d683a | 2010-06-01 11:19:39 +0000 | [diff] [blame] | 604 | void efx_schedule_slow_fill(struct efx_rx_queue *rx_queue) |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 605 | { |
Steve Hodgson | 90d683a | 2010-06-01 11:19:39 +0000 | [diff] [blame] | 606 | mod_timer(&rx_queue->slow_fill, jiffies + msecs_to_jiffies(100)); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 607 | } |
| 608 | |
| 609 | /************************************************************************** |
| 610 | * |
| 611 | * Port handling |
| 612 | * |
| 613 | **************************************************************************/ |
| 614 | |
| 615 | /* This ensures that the kernel is kept informed (via |
| 616 | * netif_carrier_on/off) of the link status, and also maintains the |
| 617 | * link status's stop on the port's TX queue. |
| 618 | */ |
Steve Hodgson | fdaa9ae | 2009-11-28 05:34:05 +0000 | [diff] [blame] | 619 | void efx_link_status_changed(struct efx_nic *efx) |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 620 | { |
Ben Hutchings | eb50c0d | 2009-11-23 16:06:30 +0000 | [diff] [blame] | 621 | struct efx_link_state *link_state = &efx->link_state; |
| 622 | |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 623 | /* SFC Bug 5356: A net_dev notifier is registered, so we must ensure |
| 624 | * that no events are triggered between unregister_netdev() and the |
| 625 | * driver unloading. A more general condition is that NETDEV_CHANGE |
| 626 | * can only be generated between NETDEV_UP and NETDEV_DOWN */ |
| 627 | if (!netif_running(efx->net_dev)) |
| 628 | return; |
| 629 | |
Ben Hutchings | 8c8661e | 2008-09-01 12:49:02 +0100 | [diff] [blame] | 630 | if (efx->port_inhibited) { |
| 631 | netif_carrier_off(efx->net_dev); |
| 632 | return; |
| 633 | } |
| 634 | |
Ben Hutchings | eb50c0d | 2009-11-23 16:06:30 +0000 | [diff] [blame] | 635 | if (link_state->up != netif_carrier_ok(efx->net_dev)) { |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 636 | efx->n_link_state_changes++; |
| 637 | |
Ben Hutchings | eb50c0d | 2009-11-23 16:06:30 +0000 | [diff] [blame] | 638 | if (link_state->up) |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 639 | netif_carrier_on(efx->net_dev); |
| 640 | else |
| 641 | netif_carrier_off(efx->net_dev); |
| 642 | } |
| 643 | |
| 644 | /* Status message for kernel log */ |
Ben Hutchings | eb50c0d | 2009-11-23 16:06:30 +0000 | [diff] [blame] | 645 | if (link_state->up) { |
Ben Hutchings | 62776d0 | 2010-06-23 11:30:07 +0000 | [diff] [blame] | 646 | netif_info(efx, link, efx->net_dev, |
| 647 | "link up at %uMbps %s-duplex (MTU %d)%s\n", |
| 648 | link_state->speed, link_state->fd ? "full" : "half", |
| 649 | efx->net_dev->mtu, |
| 650 | (efx->promiscuous ? " [PROMISC]" : "")); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 651 | } else { |
Ben Hutchings | 62776d0 | 2010-06-23 11:30:07 +0000 | [diff] [blame] | 652 | netif_info(efx, link, efx->net_dev, "link down\n"); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 653 | } |
| 654 | |
| 655 | } |
| 656 | |
Ben Hutchings | d3245b2 | 2009-11-29 03:42:41 +0000 | [diff] [blame] | 657 | void efx_link_set_advertising(struct efx_nic *efx, u32 advertising) |
| 658 | { |
| 659 | efx->link_advertising = advertising; |
| 660 | if (advertising) { |
| 661 | if (advertising & ADVERTISED_Pause) |
| 662 | efx->wanted_fc |= (EFX_FC_TX | EFX_FC_RX); |
| 663 | else |
| 664 | efx->wanted_fc &= ~(EFX_FC_TX | EFX_FC_RX); |
| 665 | if (advertising & ADVERTISED_Asym_Pause) |
| 666 | efx->wanted_fc ^= EFX_FC_TX; |
| 667 | } |
| 668 | } |
| 669 | |
| 670 | void efx_link_set_wanted_fc(struct efx_nic *efx, enum efx_fc_type wanted_fc) |
| 671 | { |
| 672 | efx->wanted_fc = wanted_fc; |
| 673 | if (efx->link_advertising) { |
| 674 | if (wanted_fc & EFX_FC_RX) |
| 675 | efx->link_advertising |= (ADVERTISED_Pause | |
| 676 | ADVERTISED_Asym_Pause); |
| 677 | else |
| 678 | efx->link_advertising &= ~(ADVERTISED_Pause | |
| 679 | ADVERTISED_Asym_Pause); |
| 680 | if (wanted_fc & EFX_FC_TX) |
| 681 | efx->link_advertising ^= ADVERTISED_Asym_Pause; |
| 682 | } |
| 683 | } |
| 684 | |
Ben Hutchings | 115122a | 2009-03-04 09:52:52 +0000 | [diff] [blame] | 685 | static void efx_fini_port(struct efx_nic *efx); |
| 686 | |
Ben Hutchings | d3245b2 | 2009-11-29 03:42:41 +0000 | [diff] [blame] | 687 | /* Push loopback/power/transmit disable settings to the PHY, and reconfigure |
| 688 | * the MAC appropriately. All other PHY configuration changes are pushed |
| 689 | * through phy_op->set_settings(), and pushed asynchronously to the MAC |
| 690 | * through efx_monitor(). |
| 691 | * |
| 692 | * Callers must hold the mac_lock |
| 693 | */ |
| 694 | int __efx_reconfigure_port(struct efx_nic *efx) |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 695 | { |
Ben Hutchings | d3245b2 | 2009-11-29 03:42:41 +0000 | [diff] [blame] | 696 | enum efx_phy_mode phy_mode; |
| 697 | int rc; |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 698 | |
Ben Hutchings | d3245b2 | 2009-11-29 03:42:41 +0000 | [diff] [blame] | 699 | WARN_ON(!mutex_is_locked(&efx->mac_lock)); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 700 | |
Ben Hutchings | a816f75 | 2008-09-01 12:49:12 +0100 | [diff] [blame] | 701 | /* Serialise the promiscuous flag with efx_set_multicast_list. */ |
| 702 | if (efx_dev_registered(efx)) { |
| 703 | netif_addr_lock_bh(efx->net_dev); |
| 704 | netif_addr_unlock_bh(efx->net_dev); |
| 705 | } |
| 706 | |
Ben Hutchings | d3245b2 | 2009-11-29 03:42:41 +0000 | [diff] [blame] | 707 | /* Disable PHY transmit in mac level loopbacks */ |
| 708 | phy_mode = efx->phy_mode; |
Ben Hutchings | 177dfcd | 2008-12-12 21:50:08 -0800 | [diff] [blame] | 709 | if (LOOPBACK_INTERNAL(efx)) |
| 710 | efx->phy_mode |= PHY_MODE_TX_DISABLED; |
| 711 | else |
| 712 | efx->phy_mode &= ~PHY_MODE_TX_DISABLED; |
Ben Hutchings | 177dfcd | 2008-12-12 21:50:08 -0800 | [diff] [blame] | 713 | |
Ben Hutchings | d3245b2 | 2009-11-29 03:42:41 +0000 | [diff] [blame] | 714 | rc = efx->type->reconfigure_port(efx); |
Ben Hutchings | 177dfcd | 2008-12-12 21:50:08 -0800 | [diff] [blame] | 715 | |
Ben Hutchings | d3245b2 | 2009-11-29 03:42:41 +0000 | [diff] [blame] | 716 | if (rc) |
| 717 | efx->phy_mode = phy_mode; |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 718 | |
Ben Hutchings | d3245b2 | 2009-11-29 03:42:41 +0000 | [diff] [blame] | 719 | return rc; |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 720 | } |
| 721 | |
| 722 | /* Reinitialise the MAC to pick up new PHY settings, even if the port is |
| 723 | * disabled. */ |
Ben Hutchings | d3245b2 | 2009-11-29 03:42:41 +0000 | [diff] [blame] | 724 | int efx_reconfigure_port(struct efx_nic *efx) |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 725 | { |
Ben Hutchings | d3245b2 | 2009-11-29 03:42:41 +0000 | [diff] [blame] | 726 | int rc; |
| 727 | |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 728 | EFX_ASSERT_RESET_SERIALISED(efx); |
| 729 | |
| 730 | mutex_lock(&efx->mac_lock); |
Ben Hutchings | d3245b2 | 2009-11-29 03:42:41 +0000 | [diff] [blame] | 731 | rc = __efx_reconfigure_port(efx); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 732 | mutex_unlock(&efx->mac_lock); |
Ben Hutchings | d3245b2 | 2009-11-29 03:42:41 +0000 | [diff] [blame] | 733 | |
| 734 | return rc; |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 735 | } |
| 736 | |
Ben Hutchings | 8be4f3e | 2009-11-25 16:12:16 +0000 | [diff] [blame] | 737 | /* Asynchronous work item for changing MAC promiscuity and multicast |
| 738 | * hash. Avoid a drain/rx_ingress enable by reconfiguring the current |
| 739 | * MAC directly. */ |
Ben Hutchings | 766ca0f | 2008-12-12 21:59:24 -0800 | [diff] [blame] | 740 | static void efx_mac_work(struct work_struct *data) |
| 741 | { |
| 742 | struct efx_nic *efx = container_of(data, struct efx_nic, mac_work); |
| 743 | |
| 744 | mutex_lock(&efx->mac_lock); |
Ben Hutchings | 8be4f3e | 2009-11-25 16:12:16 +0000 | [diff] [blame] | 745 | if (efx->port_enabled) { |
Ben Hutchings | ef2b90e | 2009-11-29 03:42:31 +0000 | [diff] [blame] | 746 | efx->type->push_multicast_hash(efx); |
Ben Hutchings | 8be4f3e | 2009-11-25 16:12:16 +0000 | [diff] [blame] | 747 | efx->mac_op->reconfigure(efx); |
| 748 | } |
Ben Hutchings | 766ca0f | 2008-12-12 21:59:24 -0800 | [diff] [blame] | 749 | mutex_unlock(&efx->mac_lock); |
| 750 | } |
| 751 | |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 752 | static int efx_probe_port(struct efx_nic *efx) |
| 753 | { |
| 754 | int rc; |
| 755 | |
Ben Hutchings | 62776d0 | 2010-06-23 11:30:07 +0000 | [diff] [blame] | 756 | netif_dbg(efx, probe, efx->net_dev, "create port\n"); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 757 | |
Steve Hodgson | ff3b00a | 2009-12-23 13:46:36 +0000 | [diff] [blame] | 758 | if (phy_flash_cfg) |
| 759 | efx->phy_mode = PHY_MODE_SPECIAL; |
| 760 | |
Ben Hutchings | ef2b90e | 2009-11-29 03:42:31 +0000 | [diff] [blame] | 761 | /* Connect up MAC/PHY operations table */ |
| 762 | rc = efx->type->probe_port(efx); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 763 | if (rc) |
| 764 | goto err; |
| 765 | |
| 766 | /* Sanity check MAC address */ |
| 767 | if (is_valid_ether_addr(efx->mac_address)) { |
| 768 | memcpy(efx->net_dev->dev_addr, efx->mac_address, ETH_ALEN); |
| 769 | } else { |
Ben Hutchings | 62776d0 | 2010-06-23 11:30:07 +0000 | [diff] [blame] | 770 | netif_err(efx, probe, efx->net_dev, "invalid MAC address %pM\n", |
| 771 | efx->mac_address); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 772 | if (!allow_bad_hwaddr) { |
| 773 | rc = -EINVAL; |
| 774 | goto err; |
| 775 | } |
| 776 | random_ether_addr(efx->net_dev->dev_addr); |
Ben Hutchings | 62776d0 | 2010-06-23 11:30:07 +0000 | [diff] [blame] | 777 | netif_info(efx, probe, efx->net_dev, |
| 778 | "using locally-generated MAC %pM\n", |
| 779 | efx->net_dev->dev_addr); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 780 | } |
| 781 | |
| 782 | return 0; |
| 783 | |
| 784 | err: |
| 785 | efx_remove_port(efx); |
| 786 | return rc; |
| 787 | } |
| 788 | |
| 789 | static int efx_init_port(struct efx_nic *efx) |
| 790 | { |
| 791 | int rc; |
| 792 | |
Ben Hutchings | 62776d0 | 2010-06-23 11:30:07 +0000 | [diff] [blame] | 793 | netif_dbg(efx, drv, efx->net_dev, "init port\n"); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 794 | |
Ben Hutchings | 1dfc5ce | 2009-11-25 16:11:19 +0000 | [diff] [blame] | 795 | mutex_lock(&efx->mac_lock); |
| 796 | |
Ben Hutchings | 177dfcd | 2008-12-12 21:50:08 -0800 | [diff] [blame] | 797 | rc = efx->phy_op->init(efx); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 798 | if (rc) |
Ben Hutchings | 1dfc5ce | 2009-11-25 16:11:19 +0000 | [diff] [blame] | 799 | goto fail1; |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 800 | |
Ben Hutchings | dc8cfa5 | 2008-09-01 12:46:50 +0100 | [diff] [blame] | 801 | efx->port_initialized = true; |
Ben Hutchings | 1dfc5ce | 2009-11-25 16:11:19 +0000 | [diff] [blame] | 802 | |
Ben Hutchings | d3245b2 | 2009-11-29 03:42:41 +0000 | [diff] [blame] | 803 | /* Reconfigure the MAC before creating dma queues (required for |
| 804 | * Falcon/A1 where RX_INGR_EN/TX_DRAIN_EN isn't supported) */ |
| 805 | efx->mac_op->reconfigure(efx); |
| 806 | |
| 807 | /* Ensure the PHY advertises the correct flow control settings */ |
| 808 | rc = efx->phy_op->reconfigure(efx); |
| 809 | if (rc) |
| 810 | goto fail2; |
| 811 | |
Ben Hutchings | 1dfc5ce | 2009-11-25 16:11:19 +0000 | [diff] [blame] | 812 | mutex_unlock(&efx->mac_lock); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 813 | return 0; |
Ben Hutchings | 177dfcd | 2008-12-12 21:50:08 -0800 | [diff] [blame] | 814 | |
Ben Hutchings | 1dfc5ce | 2009-11-25 16:11:19 +0000 | [diff] [blame] | 815 | fail2: |
Ben Hutchings | 177dfcd | 2008-12-12 21:50:08 -0800 | [diff] [blame] | 816 | efx->phy_op->fini(efx); |
Ben Hutchings | 1dfc5ce | 2009-11-25 16:11:19 +0000 | [diff] [blame] | 817 | fail1: |
| 818 | mutex_unlock(&efx->mac_lock); |
Ben Hutchings | 177dfcd | 2008-12-12 21:50:08 -0800 | [diff] [blame] | 819 | return rc; |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 820 | } |
| 821 | |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 822 | static void efx_start_port(struct efx_nic *efx) |
| 823 | { |
Ben Hutchings | 62776d0 | 2010-06-23 11:30:07 +0000 | [diff] [blame] | 824 | netif_dbg(efx, ifup, efx->net_dev, "start port\n"); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 825 | BUG_ON(efx->port_enabled); |
| 826 | |
| 827 | mutex_lock(&efx->mac_lock); |
Ben Hutchings | dc8cfa5 | 2008-09-01 12:46:50 +0100 | [diff] [blame] | 828 | efx->port_enabled = true; |
Ben Hutchings | 8be4f3e | 2009-11-25 16:12:16 +0000 | [diff] [blame] | 829 | |
| 830 | /* efx_mac_work() might have been scheduled after efx_stop_port(), |
| 831 | * and then cancelled by efx_flush_all() */ |
Ben Hutchings | ef2b90e | 2009-11-29 03:42:31 +0000 | [diff] [blame] | 832 | efx->type->push_multicast_hash(efx); |
Ben Hutchings | 8be4f3e | 2009-11-25 16:12:16 +0000 | [diff] [blame] | 833 | efx->mac_op->reconfigure(efx); |
| 834 | |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 835 | mutex_unlock(&efx->mac_lock); |
| 836 | } |
| 837 | |
Steve Hodgson | fdaa9ae | 2009-11-28 05:34:05 +0000 | [diff] [blame] | 838 | /* Prevent efx_mac_work() and efx_monitor() from working */ |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 839 | static void efx_stop_port(struct efx_nic *efx) |
| 840 | { |
Ben Hutchings | 62776d0 | 2010-06-23 11:30:07 +0000 | [diff] [blame] | 841 | netif_dbg(efx, ifdown, efx->net_dev, "stop port\n"); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 842 | |
| 843 | mutex_lock(&efx->mac_lock); |
Ben Hutchings | dc8cfa5 | 2008-09-01 12:46:50 +0100 | [diff] [blame] | 844 | efx->port_enabled = false; |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 845 | mutex_unlock(&efx->mac_lock); |
| 846 | |
| 847 | /* Serialise against efx_set_multicast_list() */ |
Ben Hutchings | 5566861 | 2008-05-16 21:16:10 +0100 | [diff] [blame] | 848 | if (efx_dev_registered(efx)) { |
David S. Miller | b9e4085 | 2008-07-15 00:15:08 -0700 | [diff] [blame] | 849 | netif_addr_lock_bh(efx->net_dev); |
| 850 | netif_addr_unlock_bh(efx->net_dev); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 851 | } |
| 852 | } |
| 853 | |
| 854 | static void efx_fini_port(struct efx_nic *efx) |
| 855 | { |
Ben Hutchings | 62776d0 | 2010-06-23 11:30:07 +0000 | [diff] [blame] | 856 | netif_dbg(efx, drv, efx->net_dev, "shut down port\n"); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 857 | |
| 858 | if (!efx->port_initialized) |
| 859 | return; |
| 860 | |
Ben Hutchings | 177dfcd | 2008-12-12 21:50:08 -0800 | [diff] [blame] | 861 | efx->phy_op->fini(efx); |
Ben Hutchings | dc8cfa5 | 2008-09-01 12:46:50 +0100 | [diff] [blame] | 862 | efx->port_initialized = false; |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 863 | |
Ben Hutchings | eb50c0d | 2009-11-23 16:06:30 +0000 | [diff] [blame] | 864 | efx->link_state.up = false; |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 865 | efx_link_status_changed(efx); |
| 866 | } |
| 867 | |
| 868 | static void efx_remove_port(struct efx_nic *efx) |
| 869 | { |
Ben Hutchings | 62776d0 | 2010-06-23 11:30:07 +0000 | [diff] [blame] | 870 | netif_dbg(efx, drv, efx->net_dev, "destroying port\n"); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 871 | |
Ben Hutchings | ef2b90e | 2009-11-29 03:42:31 +0000 | [diff] [blame] | 872 | efx->type->remove_port(efx); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 873 | } |
| 874 | |
| 875 | /************************************************************************** |
| 876 | * |
| 877 | * NIC handling |
| 878 | * |
| 879 | **************************************************************************/ |
| 880 | |
| 881 | /* This configures the PCI device to enable I/O and DMA. */ |
| 882 | static int efx_init_io(struct efx_nic *efx) |
| 883 | { |
| 884 | struct pci_dev *pci_dev = efx->pci_dev; |
| 885 | dma_addr_t dma_mask = efx->type->max_dma_mask; |
| 886 | int rc; |
| 887 | |
Ben Hutchings | 62776d0 | 2010-06-23 11:30:07 +0000 | [diff] [blame] | 888 | netif_dbg(efx, probe, efx->net_dev, "initialising I/O\n"); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 889 | |
| 890 | rc = pci_enable_device(pci_dev); |
| 891 | if (rc) { |
Ben Hutchings | 62776d0 | 2010-06-23 11:30:07 +0000 | [diff] [blame] | 892 | netif_err(efx, probe, efx->net_dev, |
| 893 | "failed to enable PCI device\n"); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 894 | goto fail1; |
| 895 | } |
| 896 | |
| 897 | pci_set_master(pci_dev); |
| 898 | |
| 899 | /* Set the PCI DMA mask. Try all possibilities from our |
| 900 | * genuine mask down to 32 bits, because some architectures |
| 901 | * (e.g. x86_64 with iommu_sac_force set) will allow 40 bit |
| 902 | * masks event though they reject 46 bit masks. |
| 903 | */ |
| 904 | while (dma_mask > 0x7fffffffUL) { |
| 905 | if (pci_dma_supported(pci_dev, dma_mask) && |
| 906 | ((rc = pci_set_dma_mask(pci_dev, dma_mask)) == 0)) |
| 907 | break; |
| 908 | dma_mask >>= 1; |
| 909 | } |
| 910 | if (rc) { |
Ben Hutchings | 62776d0 | 2010-06-23 11:30:07 +0000 | [diff] [blame] | 911 | netif_err(efx, probe, efx->net_dev, |
| 912 | "could not find a suitable DMA mask\n"); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 913 | goto fail2; |
| 914 | } |
Ben Hutchings | 62776d0 | 2010-06-23 11:30:07 +0000 | [diff] [blame] | 915 | netif_dbg(efx, probe, efx->net_dev, |
| 916 | "using DMA mask %llx\n", (unsigned long long) dma_mask); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 917 | rc = pci_set_consistent_dma_mask(pci_dev, dma_mask); |
| 918 | if (rc) { |
| 919 | /* pci_set_consistent_dma_mask() is not *allowed* to |
| 920 | * fail with a mask that pci_set_dma_mask() accepted, |
| 921 | * but just in case... |
| 922 | */ |
Ben Hutchings | 62776d0 | 2010-06-23 11:30:07 +0000 | [diff] [blame] | 923 | netif_err(efx, probe, efx->net_dev, |
| 924 | "failed to set consistent DMA mask\n"); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 925 | goto fail2; |
| 926 | } |
| 927 | |
Ben Hutchings | dc803df | 2009-10-23 08:32:33 +0000 | [diff] [blame] | 928 | efx->membase_phys = pci_resource_start(efx->pci_dev, EFX_MEM_BAR); |
| 929 | rc = pci_request_region(pci_dev, EFX_MEM_BAR, "sfc"); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 930 | if (rc) { |
Ben Hutchings | 62776d0 | 2010-06-23 11:30:07 +0000 | [diff] [blame] | 931 | netif_err(efx, probe, efx->net_dev, |
| 932 | "request for memory BAR failed\n"); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 933 | rc = -EIO; |
| 934 | goto fail3; |
| 935 | } |
| 936 | efx->membase = ioremap_nocache(efx->membase_phys, |
| 937 | efx->type->mem_map_size); |
| 938 | if (!efx->membase) { |
Ben Hutchings | 62776d0 | 2010-06-23 11:30:07 +0000 | [diff] [blame] | 939 | netif_err(efx, probe, efx->net_dev, |
| 940 | "could not map memory BAR at %llx+%x\n", |
| 941 | (unsigned long long)efx->membase_phys, |
| 942 | efx->type->mem_map_size); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 943 | rc = -ENOMEM; |
| 944 | goto fail4; |
| 945 | } |
Ben Hutchings | 62776d0 | 2010-06-23 11:30:07 +0000 | [diff] [blame] | 946 | netif_dbg(efx, probe, efx->net_dev, |
| 947 | "memory BAR at %llx+%x (virtual %p)\n", |
| 948 | (unsigned long long)efx->membase_phys, |
| 949 | efx->type->mem_map_size, efx->membase); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 950 | |
| 951 | return 0; |
| 952 | |
| 953 | fail4: |
Ben Hutchings | dc803df | 2009-10-23 08:32:33 +0000 | [diff] [blame] | 954 | pci_release_region(efx->pci_dev, EFX_MEM_BAR); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 955 | fail3: |
Ben Hutchings | 2c118e0 | 2008-05-16 21:15:29 +0100 | [diff] [blame] | 956 | efx->membase_phys = 0; |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 957 | fail2: |
| 958 | pci_disable_device(efx->pci_dev); |
| 959 | fail1: |
| 960 | return rc; |
| 961 | } |
| 962 | |
| 963 | static void efx_fini_io(struct efx_nic *efx) |
| 964 | { |
Ben Hutchings | 62776d0 | 2010-06-23 11:30:07 +0000 | [diff] [blame] | 965 | netif_dbg(efx, drv, efx->net_dev, "shutting down I/O\n"); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 966 | |
| 967 | if (efx->membase) { |
| 968 | iounmap(efx->membase); |
| 969 | efx->membase = NULL; |
| 970 | } |
| 971 | |
| 972 | if (efx->membase_phys) { |
Ben Hutchings | dc803df | 2009-10-23 08:32:33 +0000 | [diff] [blame] | 973 | pci_release_region(efx->pci_dev, EFX_MEM_BAR); |
Ben Hutchings | 2c118e0 | 2008-05-16 21:15:29 +0100 | [diff] [blame] | 974 | efx->membase_phys = 0; |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 975 | } |
| 976 | |
| 977 | pci_disable_device(efx->pci_dev); |
| 978 | } |
| 979 | |
Ben Hutchings | a4900ac | 2010-04-28 09:30:43 +0000 | [diff] [blame] | 980 | /* Get number of channels wanted. Each channel will have its own IRQ, |
| 981 | * 1 RX queue and/or 2 TX queues. */ |
| 982 | static int efx_wanted_channels(void) |
Ben Hutchings | 46123d0 | 2008-09-01 12:47:33 +0100 | [diff] [blame] | 983 | { |
Rusty Russell | 2f8975f | 2009-01-10 21:58:09 -0800 | [diff] [blame] | 984 | cpumask_var_t core_mask; |
Ben Hutchings | 46123d0 | 2008-09-01 12:47:33 +0100 | [diff] [blame] | 985 | int count; |
| 986 | int cpu; |
| 987 | |
Li Zefan | 79f5599 | 2009-06-15 14:58:26 +0800 | [diff] [blame] | 988 | if (unlikely(!zalloc_cpumask_var(&core_mask, GFP_KERNEL))) { |
Rusty Russell | 2f8975f | 2009-01-10 21:58:09 -0800 | [diff] [blame] | 989 | printk(KERN_WARNING |
Mike Travis | 3977d03 | 2009-05-12 10:48:36 +0000 | [diff] [blame] | 990 | "sfc: RSS disabled due to allocation failure\n"); |
Rusty Russell | 2f8975f | 2009-01-10 21:58:09 -0800 | [diff] [blame] | 991 | return 1; |
| 992 | } |
| 993 | |
Ben Hutchings | 46123d0 | 2008-09-01 12:47:33 +0100 | [diff] [blame] | 994 | count = 0; |
| 995 | for_each_online_cpu(cpu) { |
Rusty Russell | 2f8975f | 2009-01-10 21:58:09 -0800 | [diff] [blame] | 996 | if (!cpumask_test_cpu(cpu, core_mask)) { |
Ben Hutchings | 46123d0 | 2008-09-01 12:47:33 +0100 | [diff] [blame] | 997 | ++count; |
Rusty Russell | 2f8975f | 2009-01-10 21:58:09 -0800 | [diff] [blame] | 998 | cpumask_or(core_mask, core_mask, |
Rusty Russell | fbd59a8 | 2009-01-10 21:58:08 -0800 | [diff] [blame] | 999 | topology_core_cpumask(cpu)); |
Ben Hutchings | 46123d0 | 2008-09-01 12:47:33 +0100 | [diff] [blame] | 1000 | } |
| 1001 | } |
| 1002 | |
Rusty Russell | 2f8975f | 2009-01-10 21:58:09 -0800 | [diff] [blame] | 1003 | free_cpumask_var(core_mask); |
Ben Hutchings | 46123d0 | 2008-09-01 12:47:33 +0100 | [diff] [blame] | 1004 | return count; |
| 1005 | } |
| 1006 | |
| 1007 | /* Probe the number and type of interrupts we are able to obtain, and |
| 1008 | * the resulting numbers of channels and RX queues. |
| 1009 | */ |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1010 | static void efx_probe_interrupts(struct efx_nic *efx) |
| 1011 | { |
Ben Hutchings | 46123d0 | 2008-09-01 12:47:33 +0100 | [diff] [blame] | 1012 | int max_channels = |
| 1013 | min_t(int, efx->type->phys_addr_channels, EFX_MAX_CHANNELS); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1014 | int rc, i; |
| 1015 | |
| 1016 | if (efx->interrupt_mode == EFX_INT_MODE_MSIX) { |
Ben Hutchings | 46123d0 | 2008-09-01 12:47:33 +0100 | [diff] [blame] | 1017 | struct msix_entry xentries[EFX_MAX_CHANNELS]; |
Ben Hutchings | a4900ac | 2010-04-28 09:30:43 +0000 | [diff] [blame] | 1018 | int n_channels; |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1019 | |
Ben Hutchings | a4900ac | 2010-04-28 09:30:43 +0000 | [diff] [blame] | 1020 | n_channels = efx_wanted_channels(); |
| 1021 | if (separate_tx_channels) |
| 1022 | n_channels *= 2; |
| 1023 | n_channels = min(n_channels, max_channels); |
Ben Hutchings | aa6ef27 | 2008-07-18 19:03:10 +0100 | [diff] [blame] | 1024 | |
Ben Hutchings | a4900ac | 2010-04-28 09:30:43 +0000 | [diff] [blame] | 1025 | for (i = 0; i < n_channels; i++) |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1026 | xentries[i].entry = i; |
Ben Hutchings | a4900ac | 2010-04-28 09:30:43 +0000 | [diff] [blame] | 1027 | rc = pci_enable_msix(efx->pci_dev, xentries, n_channels); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1028 | if (rc > 0) { |
Ben Hutchings | 62776d0 | 2010-06-23 11:30:07 +0000 | [diff] [blame] | 1029 | netif_err(efx, drv, efx->net_dev, |
| 1030 | "WARNING: Insufficient MSI-X vectors" |
| 1031 | " available (%d < %d).\n", rc, n_channels); |
| 1032 | netif_err(efx, drv, efx->net_dev, |
| 1033 | "WARNING: Performance may be reduced.\n"); |
Ben Hutchings | a4900ac | 2010-04-28 09:30:43 +0000 | [diff] [blame] | 1034 | EFX_BUG_ON_PARANOID(rc >= n_channels); |
| 1035 | n_channels = rc; |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1036 | rc = pci_enable_msix(efx->pci_dev, xentries, |
Ben Hutchings | a4900ac | 2010-04-28 09:30:43 +0000 | [diff] [blame] | 1037 | n_channels); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1038 | } |
| 1039 | |
| 1040 | if (rc == 0) { |
Ben Hutchings | a4900ac | 2010-04-28 09:30:43 +0000 | [diff] [blame] | 1041 | efx->n_channels = n_channels; |
| 1042 | if (separate_tx_channels) { |
| 1043 | efx->n_tx_channels = |
| 1044 | max(efx->n_channels / 2, 1U); |
| 1045 | efx->n_rx_channels = |
| 1046 | max(efx->n_channels - |
| 1047 | efx->n_tx_channels, 1U); |
| 1048 | } else { |
| 1049 | efx->n_tx_channels = efx->n_channels; |
| 1050 | efx->n_rx_channels = efx->n_channels; |
| 1051 | } |
| 1052 | for (i = 0; i < n_channels; i++) |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1053 | efx->channel[i].irq = xentries[i].vector; |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1054 | } else { |
| 1055 | /* Fall back to single channel MSI */ |
| 1056 | efx->interrupt_mode = EFX_INT_MODE_MSI; |
Ben Hutchings | 62776d0 | 2010-06-23 11:30:07 +0000 | [diff] [blame] | 1057 | netif_err(efx, drv, efx->net_dev, |
| 1058 | "could not enable MSI-X\n"); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1059 | } |
| 1060 | } |
| 1061 | |
| 1062 | /* Try single interrupt MSI */ |
| 1063 | if (efx->interrupt_mode == EFX_INT_MODE_MSI) { |
Neil Turton | 28b581a | 2008-12-12 21:41:06 -0800 | [diff] [blame] | 1064 | efx->n_channels = 1; |
Ben Hutchings | a4900ac | 2010-04-28 09:30:43 +0000 | [diff] [blame] | 1065 | efx->n_rx_channels = 1; |
| 1066 | efx->n_tx_channels = 1; |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1067 | rc = pci_enable_msi(efx->pci_dev); |
| 1068 | if (rc == 0) { |
| 1069 | efx->channel[0].irq = efx->pci_dev->irq; |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1070 | } else { |
Ben Hutchings | 62776d0 | 2010-06-23 11:30:07 +0000 | [diff] [blame] | 1071 | netif_err(efx, drv, efx->net_dev, |
| 1072 | "could not enable MSI\n"); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1073 | efx->interrupt_mode = EFX_INT_MODE_LEGACY; |
| 1074 | } |
| 1075 | } |
| 1076 | |
| 1077 | /* Assume legacy interrupts */ |
| 1078 | if (efx->interrupt_mode == EFX_INT_MODE_LEGACY) { |
Neil Turton | 28b581a | 2008-12-12 21:41:06 -0800 | [diff] [blame] | 1079 | efx->n_channels = 1 + (separate_tx_channels ? 1 : 0); |
Ben Hutchings | a4900ac | 2010-04-28 09:30:43 +0000 | [diff] [blame] | 1080 | efx->n_rx_channels = 1; |
| 1081 | efx->n_tx_channels = 1; |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1082 | efx->legacy_irq = efx->pci_dev->irq; |
| 1083 | } |
| 1084 | } |
| 1085 | |
| 1086 | static void efx_remove_interrupts(struct efx_nic *efx) |
| 1087 | { |
| 1088 | struct efx_channel *channel; |
| 1089 | |
| 1090 | /* Remove MSI/MSI-X interrupts */ |
Ben Hutchings | 64ee312 | 2008-09-01 12:47:38 +0100 | [diff] [blame] | 1091 | efx_for_each_channel(channel, efx) |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1092 | channel->irq = 0; |
| 1093 | pci_disable_msi(efx->pci_dev); |
| 1094 | pci_disable_msix(efx->pci_dev); |
| 1095 | |
| 1096 | /* Remove legacy interrupt */ |
| 1097 | efx->legacy_irq = 0; |
| 1098 | } |
| 1099 | |
Ben Hutchings | 8831da7 | 2008-09-01 12:47:48 +0100 | [diff] [blame] | 1100 | static void efx_set_channels(struct efx_nic *efx) |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1101 | { |
Ben Hutchings | a4900ac | 2010-04-28 09:30:43 +0000 | [diff] [blame] | 1102 | struct efx_channel *channel; |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1103 | struct efx_tx_queue *tx_queue; |
| 1104 | struct efx_rx_queue *rx_queue; |
Ben Hutchings | a4900ac | 2010-04-28 09:30:43 +0000 | [diff] [blame] | 1105 | unsigned tx_channel_offset = |
| 1106 | separate_tx_channels ? efx->n_channels - efx->n_tx_channels : 0; |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1107 | |
Ben Hutchings | a4900ac | 2010-04-28 09:30:43 +0000 | [diff] [blame] | 1108 | efx_for_each_channel(channel, efx) { |
| 1109 | if (channel->channel - tx_channel_offset < efx->n_tx_channels) { |
| 1110 | channel->tx_queue = &efx->tx_queue[ |
| 1111 | (channel->channel - tx_channel_offset) * |
| 1112 | EFX_TXQ_TYPES]; |
| 1113 | efx_for_each_channel_tx_queue(tx_queue, channel) |
| 1114 | tx_queue->channel = channel; |
| 1115 | } |
Ben Hutchings | 60ac106 | 2008-09-01 12:44:59 +0100 | [diff] [blame] | 1116 | } |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1117 | |
Ben Hutchings | a4900ac | 2010-04-28 09:30:43 +0000 | [diff] [blame] | 1118 | efx_for_each_rx_queue(rx_queue, efx) |
Ben Hutchings | 8831da7 | 2008-09-01 12:47:48 +0100 | [diff] [blame] | 1119 | rx_queue->channel = &efx->channel[rx_queue->queue]; |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1120 | } |
| 1121 | |
| 1122 | static int efx_probe_nic(struct efx_nic *efx) |
| 1123 | { |
Ben Hutchings | 765c9f4 | 2010-06-30 05:06:28 +0000 | [diff] [blame] | 1124 | size_t i; |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1125 | int rc; |
| 1126 | |
Ben Hutchings | 62776d0 | 2010-06-23 11:30:07 +0000 | [diff] [blame] | 1127 | netif_dbg(efx, probe, efx->net_dev, "creating NIC\n"); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1128 | |
| 1129 | /* Carry out hardware-type specific initialisation */ |
Ben Hutchings | ef2b90e | 2009-11-29 03:42:31 +0000 | [diff] [blame] | 1130 | rc = efx->type->probe(efx); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1131 | if (rc) |
| 1132 | return rc; |
| 1133 | |
Ben Hutchings | a4900ac | 2010-04-28 09:30:43 +0000 | [diff] [blame] | 1134 | /* Determine the number of channels and queues by trying to hook |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1135 | * in MSI-X interrupts. */ |
| 1136 | efx_probe_interrupts(efx); |
| 1137 | |
Ben Hutchings | 5d3a6fc | 2010-06-25 07:05:43 +0000 | [diff] [blame] | 1138 | if (efx->n_channels > 1) |
| 1139 | get_random_bytes(&efx->rx_hash_key, sizeof(efx->rx_hash_key)); |
Ben Hutchings | 765c9f4 | 2010-06-30 05:06:28 +0000 | [diff] [blame] | 1140 | for (i = 0; i < ARRAY_SIZE(efx->rx_indir_table); i++) |
| 1141 | efx->rx_indir_table[i] = i % efx->n_rx_channels; |
Ben Hutchings | 5d3a6fc | 2010-06-25 07:05:43 +0000 | [diff] [blame] | 1142 | |
Ben Hutchings | 8831da7 | 2008-09-01 12:47:48 +0100 | [diff] [blame] | 1143 | efx_set_channels(efx); |
Ben Hutchings | a4900ac | 2010-04-28 09:30:43 +0000 | [diff] [blame] | 1144 | efx->net_dev->real_num_tx_queues = efx->n_tx_channels; |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1145 | |
| 1146 | /* Initialise the interrupt moderation settings */ |
Ben Hutchings | 6fb70fd | 2009-03-20 13:30:37 +0000 | [diff] [blame] | 1147 | efx_init_irq_moderation(efx, tx_irq_mod_usec, rx_irq_mod_usec, true); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1148 | |
| 1149 | return 0; |
| 1150 | } |
| 1151 | |
| 1152 | static void efx_remove_nic(struct efx_nic *efx) |
| 1153 | { |
Ben Hutchings | 62776d0 | 2010-06-23 11:30:07 +0000 | [diff] [blame] | 1154 | netif_dbg(efx, drv, efx->net_dev, "destroying NIC\n"); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1155 | |
| 1156 | efx_remove_interrupts(efx); |
Ben Hutchings | ef2b90e | 2009-11-29 03:42:31 +0000 | [diff] [blame] | 1157 | efx->type->remove(efx); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1158 | } |
| 1159 | |
| 1160 | /************************************************************************** |
| 1161 | * |
| 1162 | * NIC startup/shutdown |
| 1163 | * |
| 1164 | *************************************************************************/ |
| 1165 | |
| 1166 | static int efx_probe_all(struct efx_nic *efx) |
| 1167 | { |
| 1168 | struct efx_channel *channel; |
| 1169 | int rc; |
| 1170 | |
| 1171 | /* Create NIC */ |
| 1172 | rc = efx_probe_nic(efx); |
| 1173 | if (rc) { |
Ben Hutchings | 62776d0 | 2010-06-23 11:30:07 +0000 | [diff] [blame] | 1174 | netif_err(efx, probe, efx->net_dev, "failed to create NIC\n"); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1175 | goto fail1; |
| 1176 | } |
| 1177 | |
| 1178 | /* Create port */ |
| 1179 | rc = efx_probe_port(efx); |
| 1180 | if (rc) { |
Ben Hutchings | 62776d0 | 2010-06-23 11:30:07 +0000 | [diff] [blame] | 1181 | netif_err(efx, probe, efx->net_dev, "failed to create port\n"); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1182 | goto fail2; |
| 1183 | } |
| 1184 | |
| 1185 | /* Create channels */ |
| 1186 | efx_for_each_channel(channel, efx) { |
| 1187 | rc = efx_probe_channel(channel); |
| 1188 | if (rc) { |
Ben Hutchings | 62776d0 | 2010-06-23 11:30:07 +0000 | [diff] [blame] | 1189 | netif_err(efx, probe, efx->net_dev, |
| 1190 | "failed to create channel %d\n", |
| 1191 | channel->channel); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1192 | goto fail3; |
| 1193 | } |
| 1194 | } |
Ben Hutchings | 56536e9 | 2008-12-12 21:37:02 -0800 | [diff] [blame] | 1195 | efx_set_channel_names(efx); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1196 | |
| 1197 | return 0; |
| 1198 | |
| 1199 | fail3: |
| 1200 | efx_for_each_channel(channel, efx) |
| 1201 | efx_remove_channel(channel); |
| 1202 | efx_remove_port(efx); |
| 1203 | fail2: |
| 1204 | efx_remove_nic(efx); |
| 1205 | fail1: |
| 1206 | return rc; |
| 1207 | } |
| 1208 | |
| 1209 | /* Called after previous invocation(s) of efx_stop_all, restarts the |
| 1210 | * port, kernel transmit queue, NAPI processing and hardware interrupts, |
| 1211 | * and ensures that the port is scheduled to be reconfigured. |
| 1212 | * This function is safe to call multiple times when the NIC is in any |
| 1213 | * state. */ |
| 1214 | static void efx_start_all(struct efx_nic *efx) |
| 1215 | { |
| 1216 | struct efx_channel *channel; |
| 1217 | |
| 1218 | EFX_ASSERT_RESET_SERIALISED(efx); |
| 1219 | |
| 1220 | /* Check that it is appropriate to restart the interface. All |
| 1221 | * of these flags are safe to read under just the rtnl lock */ |
| 1222 | if (efx->port_enabled) |
| 1223 | return; |
| 1224 | if ((efx->state != STATE_RUNNING) && (efx->state != STATE_INIT)) |
| 1225 | return; |
Ben Hutchings | 5566861 | 2008-05-16 21:16:10 +0100 | [diff] [blame] | 1226 | if (efx_dev_registered(efx) && !netif_running(efx->net_dev)) |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1227 | return; |
| 1228 | |
| 1229 | /* Mark the port as enabled so port reconfigurations can start, then |
| 1230 | * restart the transmit interface early so the watchdog timer stops */ |
| 1231 | efx_start_port(efx); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1232 | |
Ben Hutchings | a4900ac | 2010-04-28 09:30:43 +0000 | [diff] [blame] | 1233 | efx_for_each_channel(channel, efx) { |
| 1234 | if (efx_dev_registered(efx)) |
| 1235 | efx_wake_queue(channel); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1236 | efx_start_channel(channel); |
Ben Hutchings | a4900ac | 2010-04-28 09:30:43 +0000 | [diff] [blame] | 1237 | } |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1238 | |
Ben Hutchings | 152b6a6 | 2009-11-29 03:43:56 +0000 | [diff] [blame] | 1239 | efx_nic_enable_interrupts(efx); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1240 | |
Ben Hutchings | 8880f4e | 2009-11-29 15:15:41 +0000 | [diff] [blame] | 1241 | /* Switch to event based MCDI completions after enabling interrupts. |
| 1242 | * If a reset has been scheduled, then we need to stay in polled mode. |
| 1243 | * Rather than serialising efx_mcdi_mode_event() [which sleeps] and |
| 1244 | * reset_pending [modified from an atomic context], we instead guarantee |
| 1245 | * that efx_mcdi_mode_poll() isn't reverted erroneously */ |
| 1246 | efx_mcdi_mode_event(efx); |
| 1247 | if (efx->reset_pending != RESET_TYPE_NONE) |
| 1248 | efx_mcdi_mode_poll(efx); |
| 1249 | |
Steve Hodgson | 78c1f0a | 2009-11-29 03:43:00 +0000 | [diff] [blame] | 1250 | /* Start the hardware monitor if there is one. Otherwise (we're link |
| 1251 | * event driven), we have to poll the PHY because after an event queue |
| 1252 | * flush, we could have a missed a link state change */ |
| 1253 | if (efx->type->monitor != NULL) { |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1254 | queue_delayed_work(efx->workqueue, &efx->monitor_work, |
| 1255 | efx_monitor_interval); |
Steve Hodgson | 78c1f0a | 2009-11-29 03:43:00 +0000 | [diff] [blame] | 1256 | } else { |
| 1257 | mutex_lock(&efx->mac_lock); |
| 1258 | if (efx->phy_op->poll(efx)) |
| 1259 | efx_link_status_changed(efx); |
| 1260 | mutex_unlock(&efx->mac_lock); |
| 1261 | } |
Ben Hutchings | 55edc6e | 2009-11-25 16:11:35 +0000 | [diff] [blame] | 1262 | |
Ben Hutchings | ef2b90e | 2009-11-29 03:42:31 +0000 | [diff] [blame] | 1263 | efx->type->start_stats(efx); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1264 | } |
| 1265 | |
| 1266 | /* Flush all delayed work. Should only be called when no more delayed work |
| 1267 | * will be scheduled. This doesn't flush pending online resets (efx_reset), |
| 1268 | * since we're holding the rtnl_lock at this point. */ |
| 1269 | static void efx_flush_all(struct efx_nic *efx) |
| 1270 | { |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1271 | /* Make sure the hardware monitor is stopped */ |
| 1272 | cancel_delayed_work_sync(&efx->monitor_work); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1273 | /* Stop scheduled port reconfigurations */ |
Ben Hutchings | 766ca0f | 2008-12-12 21:59:24 -0800 | [diff] [blame] | 1274 | cancel_work_sync(&efx->mac_work); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1275 | } |
| 1276 | |
| 1277 | /* Quiesce hardware and software without bringing the link down. |
| 1278 | * Safe to call multiple times, when the nic and interface is in any |
| 1279 | * state. The caller is guaranteed to subsequently be in a position |
| 1280 | * to modify any hardware and software state they see fit without |
| 1281 | * taking locks. */ |
| 1282 | static void efx_stop_all(struct efx_nic *efx) |
| 1283 | { |
| 1284 | struct efx_channel *channel; |
| 1285 | |
| 1286 | EFX_ASSERT_RESET_SERIALISED(efx); |
| 1287 | |
| 1288 | /* port_enabled can be read safely under the rtnl lock */ |
| 1289 | if (!efx->port_enabled) |
| 1290 | return; |
| 1291 | |
Ben Hutchings | ef2b90e | 2009-11-29 03:42:31 +0000 | [diff] [blame] | 1292 | efx->type->stop_stats(efx); |
Ben Hutchings | 55edc6e | 2009-11-25 16:11:35 +0000 | [diff] [blame] | 1293 | |
Ben Hutchings | 8880f4e | 2009-11-29 15:15:41 +0000 | [diff] [blame] | 1294 | /* Switch to MCDI polling on Siena before disabling interrupts */ |
| 1295 | efx_mcdi_mode_poll(efx); |
| 1296 | |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1297 | /* Disable interrupts and wait for ISR to complete */ |
Ben Hutchings | 152b6a6 | 2009-11-29 03:43:56 +0000 | [diff] [blame] | 1298 | efx_nic_disable_interrupts(efx); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1299 | if (efx->legacy_irq) |
| 1300 | synchronize_irq(efx->legacy_irq); |
Ben Hutchings | 64ee312 | 2008-09-01 12:47:38 +0100 | [diff] [blame] | 1301 | efx_for_each_channel(channel, efx) { |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1302 | if (channel->irq) |
| 1303 | synchronize_irq(channel->irq); |
Ben Hutchings | b347564 | 2008-05-16 21:15:49 +0100 | [diff] [blame] | 1304 | } |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1305 | |
| 1306 | /* Stop all NAPI processing and synchronous rx refills */ |
| 1307 | efx_for_each_channel(channel, efx) |
| 1308 | efx_stop_channel(channel); |
| 1309 | |
| 1310 | /* Stop all asynchronous port reconfigurations. Since all |
| 1311 | * event processing has already been stopped, there is no |
| 1312 | * window to loose phy events */ |
| 1313 | efx_stop_port(efx); |
| 1314 | |
Steve Hodgson | fdaa9ae | 2009-11-28 05:34:05 +0000 | [diff] [blame] | 1315 | /* Flush efx_mac_work(), refill_workqueue, monitor_work */ |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1316 | efx_flush_all(efx); |
| 1317 | |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1318 | /* Stop the kernel transmit interface late, so the watchdog |
| 1319 | * timer isn't ticking over the flush */ |
Ben Hutchings | 5566861 | 2008-05-16 21:16:10 +0100 | [diff] [blame] | 1320 | if (efx_dev_registered(efx)) { |
Ben Hutchings | a4900ac | 2010-04-28 09:30:43 +0000 | [diff] [blame] | 1321 | struct efx_channel *channel; |
| 1322 | efx_for_each_channel(channel, efx) |
| 1323 | efx_stop_queue(channel); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1324 | netif_tx_lock_bh(efx->net_dev); |
| 1325 | netif_tx_unlock_bh(efx->net_dev); |
| 1326 | } |
| 1327 | } |
| 1328 | |
| 1329 | static void efx_remove_all(struct efx_nic *efx) |
| 1330 | { |
| 1331 | struct efx_channel *channel; |
| 1332 | |
| 1333 | efx_for_each_channel(channel, efx) |
| 1334 | efx_remove_channel(channel); |
| 1335 | efx_remove_port(efx); |
| 1336 | efx_remove_nic(efx); |
| 1337 | } |
| 1338 | |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1339 | /************************************************************************** |
| 1340 | * |
| 1341 | * Interrupt moderation |
| 1342 | * |
| 1343 | **************************************************************************/ |
| 1344 | |
Ben Hutchings | 0d86ebd | 2009-10-23 08:32:13 +0000 | [diff] [blame] | 1345 | static unsigned irq_mod_ticks(int usecs, int resolution) |
| 1346 | { |
| 1347 | if (usecs <= 0) |
| 1348 | return 0; /* cannot receive interrupts ahead of time :-) */ |
| 1349 | if (usecs < resolution) |
| 1350 | return 1; /* never round down to 0 */ |
| 1351 | return usecs / resolution; |
| 1352 | } |
| 1353 | |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1354 | /* Set interrupt moderation parameters */ |
Ben Hutchings | 6fb70fd | 2009-03-20 13:30:37 +0000 | [diff] [blame] | 1355 | void efx_init_irq_moderation(struct efx_nic *efx, int tx_usecs, int rx_usecs, |
| 1356 | bool rx_adaptive) |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1357 | { |
| 1358 | struct efx_tx_queue *tx_queue; |
| 1359 | struct efx_rx_queue *rx_queue; |
Ben Hutchings | 152b6a6 | 2009-11-29 03:43:56 +0000 | [diff] [blame] | 1360 | unsigned tx_ticks = irq_mod_ticks(tx_usecs, EFX_IRQ_MOD_RESOLUTION); |
| 1361 | unsigned rx_ticks = irq_mod_ticks(rx_usecs, EFX_IRQ_MOD_RESOLUTION); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1362 | |
| 1363 | EFX_ASSERT_RESET_SERIALISED(efx); |
| 1364 | |
| 1365 | efx_for_each_tx_queue(tx_queue, efx) |
Ben Hutchings | 0d86ebd | 2009-10-23 08:32:13 +0000 | [diff] [blame] | 1366 | tx_queue->channel->irq_moderation = tx_ticks; |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1367 | |
Ben Hutchings | 6fb70fd | 2009-03-20 13:30:37 +0000 | [diff] [blame] | 1368 | efx->irq_rx_adaptive = rx_adaptive; |
Ben Hutchings | 0d86ebd | 2009-10-23 08:32:13 +0000 | [diff] [blame] | 1369 | efx->irq_rx_moderation = rx_ticks; |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1370 | efx_for_each_rx_queue(rx_queue, efx) |
Ben Hutchings | 0d86ebd | 2009-10-23 08:32:13 +0000 | [diff] [blame] | 1371 | rx_queue->channel->irq_moderation = rx_ticks; |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1372 | } |
| 1373 | |
| 1374 | /************************************************************************** |
| 1375 | * |
| 1376 | * Hardware monitor |
| 1377 | * |
| 1378 | **************************************************************************/ |
| 1379 | |
| 1380 | /* Run periodically off the general workqueue. Serialised against |
| 1381 | * efx_reconfigure_port via the mac_lock */ |
| 1382 | static void efx_monitor(struct work_struct *data) |
| 1383 | { |
| 1384 | struct efx_nic *efx = container_of(data, struct efx_nic, |
| 1385 | monitor_work.work); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1386 | |
Ben Hutchings | 62776d0 | 2010-06-23 11:30:07 +0000 | [diff] [blame] | 1387 | netif_vdbg(efx, timer, efx->net_dev, |
| 1388 | "hardware monitor executing on CPU %d\n", |
| 1389 | raw_smp_processor_id()); |
Ben Hutchings | ef2b90e | 2009-11-29 03:42:31 +0000 | [diff] [blame] | 1390 | BUG_ON(efx->type->monitor == NULL); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1391 | |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1392 | /* If the mac_lock is already held then it is likely a port |
| 1393 | * reconfiguration is already in place, which will likely do |
| 1394 | * most of the work of check_hw() anyway. */ |
Ben Hutchings | 766ca0f | 2008-12-12 21:59:24 -0800 | [diff] [blame] | 1395 | if (!mutex_trylock(&efx->mac_lock)) |
| 1396 | goto out_requeue; |
| 1397 | if (!efx->port_enabled) |
| 1398 | goto out_unlock; |
Ben Hutchings | ef2b90e | 2009-11-29 03:42:31 +0000 | [diff] [blame] | 1399 | efx->type->monitor(efx); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1400 | |
Ben Hutchings | 766ca0f | 2008-12-12 21:59:24 -0800 | [diff] [blame] | 1401 | out_unlock: |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1402 | mutex_unlock(&efx->mac_lock); |
Ben Hutchings | 766ca0f | 2008-12-12 21:59:24 -0800 | [diff] [blame] | 1403 | out_requeue: |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1404 | queue_delayed_work(efx->workqueue, &efx->monitor_work, |
| 1405 | efx_monitor_interval); |
| 1406 | } |
| 1407 | |
| 1408 | /************************************************************************** |
| 1409 | * |
| 1410 | * ioctls |
| 1411 | * |
| 1412 | *************************************************************************/ |
| 1413 | |
| 1414 | /* Net device ioctl |
| 1415 | * Context: process, rtnl_lock() held. |
| 1416 | */ |
| 1417 | static int efx_ioctl(struct net_device *net_dev, struct ifreq *ifr, int cmd) |
| 1418 | { |
Ben Hutchings | 767e468 | 2008-09-01 12:43:14 +0100 | [diff] [blame] | 1419 | struct efx_nic *efx = netdev_priv(net_dev); |
Ben Hutchings | 68e7f45 | 2009-04-29 08:05:08 +0000 | [diff] [blame] | 1420 | struct mii_ioctl_data *data = if_mii(ifr); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1421 | |
| 1422 | EFX_ASSERT_RESET_SERIALISED(efx); |
| 1423 | |
Ben Hutchings | 68e7f45 | 2009-04-29 08:05:08 +0000 | [diff] [blame] | 1424 | /* Convert phy_id from older PRTAD/DEVAD format */ |
| 1425 | if ((cmd == SIOCGMIIREG || cmd == SIOCSMIIREG) && |
| 1426 | (data->phy_id & 0xfc00) == 0x0400) |
| 1427 | data->phy_id ^= MDIO_PHY_ID_C45 | 0x0400; |
| 1428 | |
| 1429 | return mdio_mii_ioctl(&efx->mdio, data, cmd); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1430 | } |
| 1431 | |
| 1432 | /************************************************************************** |
| 1433 | * |
| 1434 | * NAPI interface |
| 1435 | * |
| 1436 | **************************************************************************/ |
| 1437 | |
| 1438 | static int efx_init_napi(struct efx_nic *efx) |
| 1439 | { |
| 1440 | struct efx_channel *channel; |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1441 | |
| 1442 | efx_for_each_channel(channel, efx) { |
| 1443 | channel->napi_dev = efx->net_dev; |
Ben Hutchings | 718cff1 | 2009-04-14 19:47:46 -0700 | [diff] [blame] | 1444 | netif_napi_add(channel->napi_dev, &channel->napi_str, |
| 1445 | efx_poll, napi_weight); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1446 | } |
| 1447 | return 0; |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1448 | } |
| 1449 | |
| 1450 | static void efx_fini_napi(struct efx_nic *efx) |
| 1451 | { |
| 1452 | struct efx_channel *channel; |
| 1453 | |
| 1454 | efx_for_each_channel(channel, efx) { |
Ben Hutchings | 718cff1 | 2009-04-14 19:47:46 -0700 | [diff] [blame] | 1455 | if (channel->napi_dev) |
| 1456 | netif_napi_del(&channel->napi_str); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1457 | channel->napi_dev = NULL; |
| 1458 | } |
| 1459 | } |
| 1460 | |
| 1461 | /************************************************************************** |
| 1462 | * |
| 1463 | * Kernel netpoll interface |
| 1464 | * |
| 1465 | *************************************************************************/ |
| 1466 | |
| 1467 | #ifdef CONFIG_NET_POLL_CONTROLLER |
| 1468 | |
| 1469 | /* Although in the common case interrupts will be disabled, this is not |
| 1470 | * guaranteed. However, all our work happens inside the NAPI callback, |
| 1471 | * so no locking is required. |
| 1472 | */ |
| 1473 | static void efx_netpoll(struct net_device *net_dev) |
| 1474 | { |
Ben Hutchings | 767e468 | 2008-09-01 12:43:14 +0100 | [diff] [blame] | 1475 | struct efx_nic *efx = netdev_priv(net_dev); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1476 | struct efx_channel *channel; |
| 1477 | |
Ben Hutchings | 64ee312 | 2008-09-01 12:47:38 +0100 | [diff] [blame] | 1478 | efx_for_each_channel(channel, efx) |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1479 | efx_schedule_channel(channel); |
| 1480 | } |
| 1481 | |
| 1482 | #endif |
| 1483 | |
| 1484 | /************************************************************************** |
| 1485 | * |
| 1486 | * Kernel net device interface |
| 1487 | * |
| 1488 | *************************************************************************/ |
| 1489 | |
| 1490 | /* Context: process, rtnl_lock() held. */ |
| 1491 | static int efx_net_open(struct net_device *net_dev) |
| 1492 | { |
Ben Hutchings | 767e468 | 2008-09-01 12:43:14 +0100 | [diff] [blame] | 1493 | struct efx_nic *efx = netdev_priv(net_dev); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1494 | EFX_ASSERT_RESET_SERIALISED(efx); |
| 1495 | |
Ben Hutchings | 62776d0 | 2010-06-23 11:30:07 +0000 | [diff] [blame] | 1496 | netif_dbg(efx, ifup, efx->net_dev, "opening device on CPU %d\n", |
| 1497 | raw_smp_processor_id()); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1498 | |
Ben Hutchings | f4bd954 | 2008-12-26 13:48:51 -0800 | [diff] [blame] | 1499 | if (efx->state == STATE_DISABLED) |
| 1500 | return -EIO; |
Ben Hutchings | f8b87c1 | 2008-09-01 12:48:17 +0100 | [diff] [blame] | 1501 | if (efx->phy_mode & PHY_MODE_SPECIAL) |
| 1502 | return -EBUSY; |
Ben Hutchings | 8880f4e | 2009-11-29 15:15:41 +0000 | [diff] [blame] | 1503 | if (efx_mcdi_poll_reboot(efx) && efx_reset(efx, RESET_TYPE_ALL)) |
| 1504 | return -EIO; |
Ben Hutchings | f8b87c1 | 2008-09-01 12:48:17 +0100 | [diff] [blame] | 1505 | |
Steve Hodgson | 78c1f0a | 2009-11-29 03:43:00 +0000 | [diff] [blame] | 1506 | /* Notify the kernel of the link state polled during driver load, |
| 1507 | * before the monitor starts running */ |
| 1508 | efx_link_status_changed(efx); |
| 1509 | |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1510 | efx_start_all(efx); |
| 1511 | return 0; |
| 1512 | } |
| 1513 | |
| 1514 | /* Context: process, rtnl_lock() held. |
| 1515 | * Note that the kernel will ignore our return code; this method |
| 1516 | * should really be a void. |
| 1517 | */ |
| 1518 | static int efx_net_stop(struct net_device *net_dev) |
| 1519 | { |
Ben Hutchings | 767e468 | 2008-09-01 12:43:14 +0100 | [diff] [blame] | 1520 | struct efx_nic *efx = netdev_priv(net_dev); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1521 | |
Ben Hutchings | 62776d0 | 2010-06-23 11:30:07 +0000 | [diff] [blame] | 1522 | netif_dbg(efx, ifdown, efx->net_dev, "closing on CPU %d\n", |
| 1523 | raw_smp_processor_id()); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1524 | |
Ben Hutchings | f4bd954 | 2008-12-26 13:48:51 -0800 | [diff] [blame] | 1525 | if (efx->state != STATE_DISABLED) { |
| 1526 | /* Stop the device and flush all the channels */ |
| 1527 | efx_stop_all(efx); |
| 1528 | efx_fini_channels(efx); |
| 1529 | efx_init_channels(efx); |
| 1530 | } |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1531 | |
| 1532 | return 0; |
| 1533 | } |
| 1534 | |
Ben Hutchings | 5b9e207 | 2008-05-16 21:18:14 +0100 | [diff] [blame] | 1535 | /* Context: process, dev_base_lock or RTNL held, non-blocking. */ |
Ben Hutchings | 4472702 | 2010-06-08 07:21:12 +0000 | [diff] [blame] | 1536 | static struct rtnl_link_stats64 *efx_net_stats(struct net_device *net_dev) |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1537 | { |
Ben Hutchings | 767e468 | 2008-09-01 12:43:14 +0100 | [diff] [blame] | 1538 | struct efx_nic *efx = netdev_priv(net_dev); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1539 | struct efx_mac_stats *mac_stats = &efx->mac_stats; |
Ben Hutchings | 4472702 | 2010-06-08 07:21:12 +0000 | [diff] [blame] | 1540 | struct rtnl_link_stats64 *stats = &net_dev->stats64; |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1541 | |
Ben Hutchings | 55edc6e | 2009-11-25 16:11:35 +0000 | [diff] [blame] | 1542 | spin_lock_bh(&efx->stats_lock); |
Ben Hutchings | ef2b90e | 2009-11-29 03:42:31 +0000 | [diff] [blame] | 1543 | efx->type->update_stats(efx); |
Ben Hutchings | 55edc6e | 2009-11-25 16:11:35 +0000 | [diff] [blame] | 1544 | spin_unlock_bh(&efx->stats_lock); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1545 | |
| 1546 | stats->rx_packets = mac_stats->rx_packets; |
| 1547 | stats->tx_packets = mac_stats->tx_packets; |
| 1548 | stats->rx_bytes = mac_stats->rx_bytes; |
| 1549 | stats->tx_bytes = mac_stats->tx_bytes; |
| 1550 | stats->multicast = mac_stats->rx_multicast; |
| 1551 | stats->collisions = mac_stats->tx_collision; |
| 1552 | stats->rx_length_errors = (mac_stats->rx_gtjumbo + |
| 1553 | mac_stats->rx_length_error); |
| 1554 | stats->rx_over_errors = efx->n_rx_nodesc_drop_cnt; |
| 1555 | stats->rx_crc_errors = mac_stats->rx_bad; |
| 1556 | stats->rx_frame_errors = mac_stats->rx_align_error; |
| 1557 | stats->rx_fifo_errors = mac_stats->rx_overflow; |
| 1558 | stats->rx_missed_errors = mac_stats->rx_missed; |
| 1559 | stats->tx_window_errors = mac_stats->tx_late_collision; |
| 1560 | |
| 1561 | stats->rx_errors = (stats->rx_length_errors + |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1562 | stats->rx_crc_errors + |
| 1563 | stats->rx_frame_errors + |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1564 | mac_stats->rx_symbol_error); |
| 1565 | stats->tx_errors = (stats->tx_window_errors + |
| 1566 | mac_stats->tx_bad); |
| 1567 | |
| 1568 | return stats; |
| 1569 | } |
| 1570 | |
| 1571 | /* Context: netif_tx_lock held, BHs disabled. */ |
| 1572 | static void efx_watchdog(struct net_device *net_dev) |
| 1573 | { |
Ben Hutchings | 767e468 | 2008-09-01 12:43:14 +0100 | [diff] [blame] | 1574 | struct efx_nic *efx = netdev_priv(net_dev); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1575 | |
Ben Hutchings | 62776d0 | 2010-06-23 11:30:07 +0000 | [diff] [blame] | 1576 | netif_err(efx, tx_err, efx->net_dev, |
| 1577 | "TX stuck with port_enabled=%d: resetting channels\n", |
| 1578 | efx->port_enabled); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1579 | |
Ben Hutchings | 739bb23d | 2008-11-04 20:35:36 +0000 | [diff] [blame] | 1580 | efx_schedule_reset(efx, RESET_TYPE_TX_WATCHDOG); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1581 | } |
| 1582 | |
| 1583 | |
| 1584 | /* Context: process, rtnl_lock() held. */ |
| 1585 | static int efx_change_mtu(struct net_device *net_dev, int new_mtu) |
| 1586 | { |
Ben Hutchings | 767e468 | 2008-09-01 12:43:14 +0100 | [diff] [blame] | 1587 | struct efx_nic *efx = netdev_priv(net_dev); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1588 | int rc = 0; |
| 1589 | |
| 1590 | EFX_ASSERT_RESET_SERIALISED(efx); |
| 1591 | |
| 1592 | if (new_mtu > EFX_MAX_MTU) |
| 1593 | return -EINVAL; |
| 1594 | |
| 1595 | efx_stop_all(efx); |
| 1596 | |
Ben Hutchings | 62776d0 | 2010-06-23 11:30:07 +0000 | [diff] [blame] | 1597 | netif_dbg(efx, drv, efx->net_dev, "changing MTU to %d\n", new_mtu); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1598 | |
| 1599 | efx_fini_channels(efx); |
Ben Hutchings | d3245b2 | 2009-11-29 03:42:41 +0000 | [diff] [blame] | 1600 | |
| 1601 | mutex_lock(&efx->mac_lock); |
| 1602 | /* Reconfigure the MAC before enabling the dma queues so that |
| 1603 | * the RX buffers don't overflow */ |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1604 | net_dev->mtu = new_mtu; |
Ben Hutchings | d3245b2 | 2009-11-29 03:42:41 +0000 | [diff] [blame] | 1605 | efx->mac_op->reconfigure(efx); |
| 1606 | mutex_unlock(&efx->mac_lock); |
| 1607 | |
Ben Hutchings | bc3c90a | 2008-09-01 12:48:46 +0100 | [diff] [blame] | 1608 | efx_init_channels(efx); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1609 | |
| 1610 | efx_start_all(efx); |
| 1611 | return rc; |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1612 | } |
| 1613 | |
| 1614 | static int efx_set_mac_address(struct net_device *net_dev, void *data) |
| 1615 | { |
Ben Hutchings | 767e468 | 2008-09-01 12:43:14 +0100 | [diff] [blame] | 1616 | struct efx_nic *efx = netdev_priv(net_dev); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1617 | struct sockaddr *addr = data; |
| 1618 | char *new_addr = addr->sa_data; |
| 1619 | |
| 1620 | EFX_ASSERT_RESET_SERIALISED(efx); |
| 1621 | |
| 1622 | if (!is_valid_ether_addr(new_addr)) { |
Ben Hutchings | 62776d0 | 2010-06-23 11:30:07 +0000 | [diff] [blame] | 1623 | netif_err(efx, drv, efx->net_dev, |
| 1624 | "invalid ethernet MAC address requested: %pM\n", |
| 1625 | new_addr); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1626 | return -EINVAL; |
| 1627 | } |
| 1628 | |
| 1629 | memcpy(net_dev->dev_addr, new_addr, net_dev->addr_len); |
| 1630 | |
| 1631 | /* Reconfigure the MAC */ |
Ben Hutchings | d3245b2 | 2009-11-29 03:42:41 +0000 | [diff] [blame] | 1632 | mutex_lock(&efx->mac_lock); |
| 1633 | efx->mac_op->reconfigure(efx); |
| 1634 | mutex_unlock(&efx->mac_lock); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1635 | |
| 1636 | return 0; |
| 1637 | } |
| 1638 | |
Ben Hutchings | a816f75 | 2008-09-01 12:49:12 +0100 | [diff] [blame] | 1639 | /* Context: netif_addr_lock held, BHs disabled. */ |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1640 | static void efx_set_multicast_list(struct net_device *net_dev) |
| 1641 | { |
Ben Hutchings | 767e468 | 2008-09-01 12:43:14 +0100 | [diff] [blame] | 1642 | struct efx_nic *efx = netdev_priv(net_dev); |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 1643 | struct netdev_hw_addr *ha; |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1644 | union efx_multicast_hash *mc_hash = &efx->multicast_hash; |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1645 | u32 crc; |
| 1646 | int bit; |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1647 | |
Ben Hutchings | 8be4f3e | 2009-11-25 16:12:16 +0000 | [diff] [blame] | 1648 | efx->promiscuous = !!(net_dev->flags & IFF_PROMISC); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1649 | |
| 1650 | /* Build multicast hash table */ |
Ben Hutchings | 8be4f3e | 2009-11-25 16:12:16 +0000 | [diff] [blame] | 1651 | if (efx->promiscuous || (net_dev->flags & IFF_ALLMULTI)) { |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1652 | memset(mc_hash, 0xff, sizeof(*mc_hash)); |
| 1653 | } else { |
| 1654 | memset(mc_hash, 0x00, sizeof(*mc_hash)); |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 1655 | netdev_for_each_mc_addr(ha, net_dev) { |
| 1656 | crc = ether_crc_le(ETH_ALEN, ha->addr); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1657 | bit = crc & (EFX_MCAST_HASH_ENTRIES - 1); |
| 1658 | set_bit_le(bit, mc_hash->byte); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1659 | } |
Ben Hutchings | 8be4f3e | 2009-11-25 16:12:16 +0000 | [diff] [blame] | 1660 | |
| 1661 | /* Broadcast packets go through the multicast hash filter. |
| 1662 | * ether_crc_le() of the broadcast address is 0xbe2612ff |
| 1663 | * so we always add bit 0xff to the mask. |
| 1664 | */ |
| 1665 | set_bit_le(0xff, mc_hash->byte); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1666 | } |
| 1667 | |
Ben Hutchings | 8be4f3e | 2009-11-25 16:12:16 +0000 | [diff] [blame] | 1668 | if (efx->port_enabled) |
| 1669 | queue_work(efx->workqueue, &efx->mac_work); |
| 1670 | /* Otherwise efx_start_port() will do this */ |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1671 | } |
| 1672 | |
Stephen Hemminger | c3ecb9f | 2008-11-21 17:32:54 -0800 | [diff] [blame] | 1673 | static const struct net_device_ops efx_netdev_ops = { |
| 1674 | .ndo_open = efx_net_open, |
| 1675 | .ndo_stop = efx_net_stop, |
Ben Hutchings | 4472702 | 2010-06-08 07:21:12 +0000 | [diff] [blame] | 1676 | .ndo_get_stats64 = efx_net_stats, |
Stephen Hemminger | c3ecb9f | 2008-11-21 17:32:54 -0800 | [diff] [blame] | 1677 | .ndo_tx_timeout = efx_watchdog, |
| 1678 | .ndo_start_xmit = efx_hard_start_xmit, |
| 1679 | .ndo_validate_addr = eth_validate_addr, |
| 1680 | .ndo_do_ioctl = efx_ioctl, |
| 1681 | .ndo_change_mtu = efx_change_mtu, |
| 1682 | .ndo_set_mac_address = efx_set_mac_address, |
| 1683 | .ndo_set_multicast_list = efx_set_multicast_list, |
| 1684 | #ifdef CONFIG_NET_POLL_CONTROLLER |
| 1685 | .ndo_poll_controller = efx_netpoll, |
| 1686 | #endif |
| 1687 | }; |
| 1688 | |
Ben Hutchings | 7dde596 | 2008-12-12 22:09:38 -0800 | [diff] [blame] | 1689 | static void efx_update_name(struct efx_nic *efx) |
| 1690 | { |
| 1691 | strcpy(efx->name, efx->net_dev->name); |
| 1692 | efx_mtd_rename(efx); |
| 1693 | efx_set_channel_names(efx); |
| 1694 | } |
| 1695 | |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1696 | static int efx_netdev_event(struct notifier_block *this, |
| 1697 | unsigned long event, void *ptr) |
| 1698 | { |
Ben Hutchings | d3208b5 | 2008-05-16 21:20:00 +0100 | [diff] [blame] | 1699 | struct net_device *net_dev = ptr; |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1700 | |
Ben Hutchings | 7dde596 | 2008-12-12 22:09:38 -0800 | [diff] [blame] | 1701 | if (net_dev->netdev_ops == &efx_netdev_ops && |
| 1702 | event == NETDEV_CHANGENAME) |
| 1703 | efx_update_name(netdev_priv(net_dev)); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1704 | |
| 1705 | return NOTIFY_DONE; |
| 1706 | } |
| 1707 | |
| 1708 | static struct notifier_block efx_netdev_notifier = { |
| 1709 | .notifier_call = efx_netdev_event, |
| 1710 | }; |
| 1711 | |
Ben Hutchings | 06d5e19 | 2008-12-12 21:47:23 -0800 | [diff] [blame] | 1712 | static ssize_t |
| 1713 | show_phy_type(struct device *dev, struct device_attribute *attr, char *buf) |
| 1714 | { |
| 1715 | struct efx_nic *efx = pci_get_drvdata(to_pci_dev(dev)); |
| 1716 | return sprintf(buf, "%d\n", efx->phy_type); |
| 1717 | } |
| 1718 | static DEVICE_ATTR(phy_type, 0644, show_phy_type, NULL); |
| 1719 | |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1720 | static int efx_register_netdev(struct efx_nic *efx) |
| 1721 | { |
| 1722 | struct net_device *net_dev = efx->net_dev; |
| 1723 | int rc; |
| 1724 | |
| 1725 | net_dev->watchdog_timeo = 5 * HZ; |
| 1726 | net_dev->irq = efx->pci_dev->irq; |
Stephen Hemminger | c3ecb9f | 2008-11-21 17:32:54 -0800 | [diff] [blame] | 1727 | net_dev->netdev_ops = &efx_netdev_ops; |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1728 | SET_ETHTOOL_OPS(net_dev, &efx_ethtool_ops); |
| 1729 | |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1730 | /* Clear MAC statistics */ |
Ben Hutchings | 177dfcd | 2008-12-12 21:50:08 -0800 | [diff] [blame] | 1731 | efx->mac_op->update_stats(efx); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1732 | memset(&efx->mac_stats, 0, sizeof(efx->mac_stats)); |
| 1733 | |
Ben Hutchings | 7dde596 | 2008-12-12 22:09:38 -0800 | [diff] [blame] | 1734 | rtnl_lock(); |
Ben Hutchings | aed0628 | 2009-08-26 08:16:27 +0000 | [diff] [blame] | 1735 | |
| 1736 | rc = dev_alloc_name(net_dev, net_dev->name); |
| 1737 | if (rc < 0) |
| 1738 | goto fail_locked; |
Ben Hutchings | 7dde596 | 2008-12-12 22:09:38 -0800 | [diff] [blame] | 1739 | efx_update_name(efx); |
Ben Hutchings | aed0628 | 2009-08-26 08:16:27 +0000 | [diff] [blame] | 1740 | |
| 1741 | rc = register_netdevice(net_dev); |
| 1742 | if (rc) |
| 1743 | goto fail_locked; |
| 1744 | |
| 1745 | /* Always start with carrier off; PHY events will detect the link */ |
| 1746 | netif_carrier_off(efx->net_dev); |
| 1747 | |
Ben Hutchings | 7dde596 | 2008-12-12 22:09:38 -0800 | [diff] [blame] | 1748 | rtnl_unlock(); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1749 | |
Ben Hutchings | 06d5e19 | 2008-12-12 21:47:23 -0800 | [diff] [blame] | 1750 | rc = device_create_file(&efx->pci_dev->dev, &dev_attr_phy_type); |
| 1751 | if (rc) { |
Ben Hutchings | 62776d0 | 2010-06-23 11:30:07 +0000 | [diff] [blame] | 1752 | netif_err(efx, drv, efx->net_dev, |
| 1753 | "failed to init net dev attributes\n"); |
Ben Hutchings | 06d5e19 | 2008-12-12 21:47:23 -0800 | [diff] [blame] | 1754 | goto fail_registered; |
| 1755 | } |
| 1756 | |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1757 | return 0; |
Ben Hutchings | 06d5e19 | 2008-12-12 21:47:23 -0800 | [diff] [blame] | 1758 | |
Ben Hutchings | aed0628 | 2009-08-26 08:16:27 +0000 | [diff] [blame] | 1759 | fail_locked: |
| 1760 | rtnl_unlock(); |
Ben Hutchings | 62776d0 | 2010-06-23 11:30:07 +0000 | [diff] [blame] | 1761 | netif_err(efx, drv, efx->net_dev, "could not register net dev\n"); |
Ben Hutchings | aed0628 | 2009-08-26 08:16:27 +0000 | [diff] [blame] | 1762 | return rc; |
| 1763 | |
Ben Hutchings | 06d5e19 | 2008-12-12 21:47:23 -0800 | [diff] [blame] | 1764 | fail_registered: |
| 1765 | unregister_netdev(net_dev); |
| 1766 | return rc; |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1767 | } |
| 1768 | |
| 1769 | static void efx_unregister_netdev(struct efx_nic *efx) |
| 1770 | { |
| 1771 | struct efx_tx_queue *tx_queue; |
| 1772 | |
| 1773 | if (!efx->net_dev) |
| 1774 | return; |
| 1775 | |
Ben Hutchings | 767e468 | 2008-09-01 12:43:14 +0100 | [diff] [blame] | 1776 | BUG_ON(netdev_priv(efx->net_dev) != efx); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1777 | |
| 1778 | /* Free up any skbs still remaining. This has to happen before |
| 1779 | * we try to unregister the netdev as running their destructors |
| 1780 | * may be needed to get the device ref. count to 0. */ |
| 1781 | efx_for_each_tx_queue(tx_queue, efx) |
| 1782 | efx_release_tx_buffers(tx_queue); |
| 1783 | |
Ben Hutchings | 5566861 | 2008-05-16 21:16:10 +0100 | [diff] [blame] | 1784 | if (efx_dev_registered(efx)) { |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1785 | strlcpy(efx->name, pci_name(efx->pci_dev), sizeof(efx->name)); |
Ben Hutchings | 06d5e19 | 2008-12-12 21:47:23 -0800 | [diff] [blame] | 1786 | device_remove_file(&efx->pci_dev->dev, &dev_attr_phy_type); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1787 | unregister_netdev(efx->net_dev); |
| 1788 | } |
| 1789 | } |
| 1790 | |
| 1791 | /************************************************************************** |
| 1792 | * |
| 1793 | * Device reset and suspend |
| 1794 | * |
| 1795 | **************************************************************************/ |
| 1796 | |
Ben Hutchings | 2467ca4 | 2008-09-01 12:48:50 +0100 | [diff] [blame] | 1797 | /* Tears down the entire software state and most of the hardware state |
| 1798 | * before reset. */ |
Ben Hutchings | d3245b2 | 2009-11-29 03:42:41 +0000 | [diff] [blame] | 1799 | void efx_reset_down(struct efx_nic *efx, enum reset_type method) |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1800 | { |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1801 | EFX_ASSERT_RESET_SERIALISED(efx); |
| 1802 | |
Ben Hutchings | 2467ca4 | 2008-09-01 12:48:50 +0100 | [diff] [blame] | 1803 | efx_stop_all(efx); |
| 1804 | mutex_lock(&efx->mac_lock); |
Ben Hutchings | f415072 | 2008-11-04 20:34:28 +0000 | [diff] [blame] | 1805 | mutex_lock(&efx->spi_lock); |
Ben Hutchings | 2467ca4 | 2008-09-01 12:48:50 +0100 | [diff] [blame] | 1806 | |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1807 | efx_fini_channels(efx); |
Steve Hodgson | 4b98828 | 2009-01-29 17:50:51 +0000 | [diff] [blame] | 1808 | if (efx->port_initialized && method != RESET_TYPE_INVISIBLE) |
| 1809 | efx->phy_op->fini(efx); |
Ben Hutchings | ef2b90e | 2009-11-29 03:42:31 +0000 | [diff] [blame] | 1810 | efx->type->fini(efx); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1811 | } |
| 1812 | |
Ben Hutchings | 2467ca4 | 2008-09-01 12:48:50 +0100 | [diff] [blame] | 1813 | /* This function will always ensure that the locks acquired in |
| 1814 | * efx_reset_down() are released. A failure return code indicates |
| 1815 | * that we were unable to reinitialise the hardware, and the |
| 1816 | * driver should be disabled. If ok is false, then the rx and tx |
| 1817 | * engines are not restarted, pending a RESET_DISABLE. */ |
Ben Hutchings | d3245b2 | 2009-11-29 03:42:41 +0000 | [diff] [blame] | 1818 | int efx_reset_up(struct efx_nic *efx, enum reset_type method, bool ok) |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1819 | { |
| 1820 | int rc; |
| 1821 | |
Ben Hutchings | 2467ca4 | 2008-09-01 12:48:50 +0100 | [diff] [blame] | 1822 | EFX_ASSERT_RESET_SERIALISED(efx); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1823 | |
Ben Hutchings | ef2b90e | 2009-11-29 03:42:31 +0000 | [diff] [blame] | 1824 | rc = efx->type->init(efx); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1825 | if (rc) { |
Ben Hutchings | 62776d0 | 2010-06-23 11:30:07 +0000 | [diff] [blame] | 1826 | netif_err(efx, drv, efx->net_dev, "failed to initialise NIC\n"); |
Ben Hutchings | eb9f674 | 2009-11-29 03:43:15 +0000 | [diff] [blame] | 1827 | goto fail; |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1828 | } |
| 1829 | |
Ben Hutchings | eb9f674 | 2009-11-29 03:43:15 +0000 | [diff] [blame] | 1830 | if (!ok) |
| 1831 | goto fail; |
| 1832 | |
Steve Hodgson | 4b98828 | 2009-01-29 17:50:51 +0000 | [diff] [blame] | 1833 | if (efx->port_initialized && method != RESET_TYPE_INVISIBLE) { |
Ben Hutchings | eb9f674 | 2009-11-29 03:43:15 +0000 | [diff] [blame] | 1834 | rc = efx->phy_op->init(efx); |
| 1835 | if (rc) |
| 1836 | goto fail; |
| 1837 | if (efx->phy_op->reconfigure(efx)) |
Ben Hutchings | 62776d0 | 2010-06-23 11:30:07 +0000 | [diff] [blame] | 1838 | netif_err(efx, drv, efx->net_dev, |
| 1839 | "could not restore PHY settings\n"); |
Steve Hodgson | 4b98828 | 2009-01-29 17:50:51 +0000 | [diff] [blame] | 1840 | } |
| 1841 | |
Ben Hutchings | eb9f674 | 2009-11-29 03:43:15 +0000 | [diff] [blame] | 1842 | efx->mac_op->reconfigure(efx); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1843 | |
Ben Hutchings | eb9f674 | 2009-11-29 03:43:15 +0000 | [diff] [blame] | 1844 | efx_init_channels(efx); |
Ben Hutchings | 2467ca4 | 2008-09-01 12:48:50 +0100 | [diff] [blame] | 1845 | |
Ben Hutchings | f415072 | 2008-11-04 20:34:28 +0000 | [diff] [blame] | 1846 | mutex_unlock(&efx->spi_lock); |
Ben Hutchings | 2467ca4 | 2008-09-01 12:48:50 +0100 | [diff] [blame] | 1847 | mutex_unlock(&efx->mac_lock); |
| 1848 | |
Ben Hutchings | eb9f674 | 2009-11-29 03:43:15 +0000 | [diff] [blame] | 1849 | efx_start_all(efx); |
| 1850 | |
| 1851 | return 0; |
| 1852 | |
| 1853 | fail: |
| 1854 | efx->port_initialized = false; |
| 1855 | |
| 1856 | mutex_unlock(&efx->spi_lock); |
| 1857 | mutex_unlock(&efx->mac_lock); |
| 1858 | |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1859 | return rc; |
| 1860 | } |
| 1861 | |
Ben Hutchings | eb9f674 | 2009-11-29 03:43:15 +0000 | [diff] [blame] | 1862 | /* Reset the NIC using the specified method. Note that the reset may |
| 1863 | * fail, in which case the card will be left in an unusable state. |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1864 | * |
Ben Hutchings | eb9f674 | 2009-11-29 03:43:15 +0000 | [diff] [blame] | 1865 | * Caller must hold the rtnl_lock. |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1866 | */ |
Ben Hutchings | eb9f674 | 2009-11-29 03:43:15 +0000 | [diff] [blame] | 1867 | int efx_reset(struct efx_nic *efx, enum reset_type method) |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1868 | { |
Ben Hutchings | eb9f674 | 2009-11-29 03:43:15 +0000 | [diff] [blame] | 1869 | int rc, rc2; |
| 1870 | bool disabled; |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1871 | |
Ben Hutchings | 62776d0 | 2010-06-23 11:30:07 +0000 | [diff] [blame] | 1872 | netif_info(efx, drv, efx->net_dev, "resetting (%s)\n", |
| 1873 | RESET_TYPE(method)); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1874 | |
Ben Hutchings | d3245b2 | 2009-11-29 03:42:41 +0000 | [diff] [blame] | 1875 | efx_reset_down(efx, method); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1876 | |
Ben Hutchings | ef2b90e | 2009-11-29 03:42:31 +0000 | [diff] [blame] | 1877 | rc = efx->type->reset(efx, method); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1878 | if (rc) { |
Ben Hutchings | 62776d0 | 2010-06-23 11:30:07 +0000 | [diff] [blame] | 1879 | netif_err(efx, drv, efx->net_dev, "failed to reset hardware\n"); |
Ben Hutchings | eb9f674 | 2009-11-29 03:43:15 +0000 | [diff] [blame] | 1880 | goto out; |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1881 | } |
| 1882 | |
| 1883 | /* Allow resets to be rescheduled. */ |
| 1884 | efx->reset_pending = RESET_TYPE_NONE; |
| 1885 | |
| 1886 | /* Reinitialise bus-mastering, which may have been turned off before |
| 1887 | * the reset was scheduled. This is still appropriate, even in the |
| 1888 | * RESET_TYPE_DISABLE since this driver generally assumes the hardware |
| 1889 | * can respond to requests. */ |
| 1890 | pci_set_master(efx->pci_dev); |
| 1891 | |
Ben Hutchings | eb9f674 | 2009-11-29 03:43:15 +0000 | [diff] [blame] | 1892 | out: |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1893 | /* Leave device stopped if necessary */ |
Ben Hutchings | eb9f674 | 2009-11-29 03:43:15 +0000 | [diff] [blame] | 1894 | disabled = rc || method == RESET_TYPE_DISABLE; |
| 1895 | rc2 = efx_reset_up(efx, method, !disabled); |
| 1896 | if (rc2) { |
| 1897 | disabled = true; |
| 1898 | if (!rc) |
| 1899 | rc = rc2; |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1900 | } |
| 1901 | |
Ben Hutchings | eb9f674 | 2009-11-29 03:43:15 +0000 | [diff] [blame] | 1902 | if (disabled) { |
Ben Hutchings | f49a458 | 2010-04-28 09:01:33 +0000 | [diff] [blame] | 1903 | dev_close(efx->net_dev); |
Ben Hutchings | 62776d0 | 2010-06-23 11:30:07 +0000 | [diff] [blame] | 1904 | netif_err(efx, drv, efx->net_dev, "has been disabled\n"); |
Ben Hutchings | f4bd954 | 2008-12-26 13:48:51 -0800 | [diff] [blame] | 1905 | efx->state = STATE_DISABLED; |
Ben Hutchings | f4bd954 | 2008-12-26 13:48:51 -0800 | [diff] [blame] | 1906 | } else { |
Ben Hutchings | 62776d0 | 2010-06-23 11:30:07 +0000 | [diff] [blame] | 1907 | netif_dbg(efx, drv, efx->net_dev, "reset complete\n"); |
Ben Hutchings | f4bd954 | 2008-12-26 13:48:51 -0800 | [diff] [blame] | 1908 | } |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1909 | return rc; |
| 1910 | } |
| 1911 | |
| 1912 | /* The worker thread exists so that code that cannot sleep can |
| 1913 | * schedule a reset for later. |
| 1914 | */ |
| 1915 | static void efx_reset_work(struct work_struct *data) |
| 1916 | { |
Ben Hutchings | eb9f674 | 2009-11-29 03:43:15 +0000 | [diff] [blame] | 1917 | struct efx_nic *efx = container_of(data, struct efx_nic, reset_work); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1918 | |
Steve Hodgson | 319ba64 | 2010-06-01 11:17:24 +0000 | [diff] [blame] | 1919 | if (efx->reset_pending == RESET_TYPE_NONE) |
| 1920 | return; |
| 1921 | |
Ben Hutchings | eb9f674 | 2009-11-29 03:43:15 +0000 | [diff] [blame] | 1922 | /* If we're not RUNNING then don't reset. Leave the reset_pending |
| 1923 | * flag set so that efx_pci_probe_main will be retried */ |
| 1924 | if (efx->state != STATE_RUNNING) { |
Ben Hutchings | 62776d0 | 2010-06-23 11:30:07 +0000 | [diff] [blame] | 1925 | netif_info(efx, drv, efx->net_dev, |
| 1926 | "scheduled reset quenched. NIC not RUNNING\n"); |
Ben Hutchings | eb9f674 | 2009-11-29 03:43:15 +0000 | [diff] [blame] | 1927 | return; |
| 1928 | } |
| 1929 | |
| 1930 | rtnl_lock(); |
Ben Hutchings | f49a458 | 2010-04-28 09:01:33 +0000 | [diff] [blame] | 1931 | (void)efx_reset(efx, efx->reset_pending); |
Ben Hutchings | eb9f674 | 2009-11-29 03:43:15 +0000 | [diff] [blame] | 1932 | rtnl_unlock(); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1933 | } |
| 1934 | |
| 1935 | void efx_schedule_reset(struct efx_nic *efx, enum reset_type type) |
| 1936 | { |
| 1937 | enum reset_type method; |
| 1938 | |
| 1939 | if (efx->reset_pending != RESET_TYPE_NONE) { |
Ben Hutchings | 62776d0 | 2010-06-23 11:30:07 +0000 | [diff] [blame] | 1940 | netif_info(efx, drv, efx->net_dev, |
| 1941 | "quenching already scheduled reset\n"); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1942 | return; |
| 1943 | } |
| 1944 | |
| 1945 | switch (type) { |
| 1946 | case RESET_TYPE_INVISIBLE: |
| 1947 | case RESET_TYPE_ALL: |
| 1948 | case RESET_TYPE_WORLD: |
| 1949 | case RESET_TYPE_DISABLE: |
| 1950 | method = type; |
| 1951 | break; |
| 1952 | case RESET_TYPE_RX_RECOVERY: |
| 1953 | case RESET_TYPE_RX_DESC_FETCH: |
| 1954 | case RESET_TYPE_TX_DESC_FETCH: |
| 1955 | case RESET_TYPE_TX_SKIP: |
| 1956 | method = RESET_TYPE_INVISIBLE; |
| 1957 | break; |
Ben Hutchings | 8880f4e | 2009-11-29 15:15:41 +0000 | [diff] [blame] | 1958 | case RESET_TYPE_MC_FAILURE: |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1959 | default: |
| 1960 | method = RESET_TYPE_ALL; |
| 1961 | break; |
| 1962 | } |
| 1963 | |
| 1964 | if (method != type) |
Ben Hutchings | 62776d0 | 2010-06-23 11:30:07 +0000 | [diff] [blame] | 1965 | netif_dbg(efx, drv, efx->net_dev, |
| 1966 | "scheduling %s reset for %s\n", |
| 1967 | RESET_TYPE(method), RESET_TYPE(type)); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1968 | else |
Ben Hutchings | 62776d0 | 2010-06-23 11:30:07 +0000 | [diff] [blame] | 1969 | netif_dbg(efx, drv, efx->net_dev, "scheduling %s reset\n", |
| 1970 | RESET_TYPE(method)); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1971 | |
| 1972 | efx->reset_pending = method; |
| 1973 | |
Ben Hutchings | 8880f4e | 2009-11-29 15:15:41 +0000 | [diff] [blame] | 1974 | /* efx_process_channel() will no longer read events once a |
| 1975 | * reset is scheduled. So switch back to poll'd MCDI completions. */ |
| 1976 | efx_mcdi_mode_poll(efx); |
| 1977 | |
Steve Hodgson | 1ab0062 | 2008-12-12 21:33:02 -0800 | [diff] [blame] | 1978 | queue_work(reset_workqueue, &efx->reset_work); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1979 | } |
| 1980 | |
| 1981 | /************************************************************************** |
| 1982 | * |
| 1983 | * List of NICs we support |
| 1984 | * |
| 1985 | **************************************************************************/ |
| 1986 | |
| 1987 | /* PCI device ID table */ |
Alexey Dobriyan | a3aa188 | 2010-01-07 11:58:11 +0000 | [diff] [blame] | 1988 | static DEFINE_PCI_DEVICE_TABLE(efx_pci_table) = { |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1989 | {PCI_DEVICE(EFX_VENDID_SFC, FALCON_A_P_DEVID), |
Ben Hutchings | daeda63 | 2009-11-28 05:36:04 +0000 | [diff] [blame] | 1990 | .driver_data = (unsigned long) &falcon_a1_nic_type}, |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1991 | {PCI_DEVICE(EFX_VENDID_SFC, FALCON_B_P_DEVID), |
Ben Hutchings | daeda63 | 2009-11-28 05:36:04 +0000 | [diff] [blame] | 1992 | .driver_data = (unsigned long) &falcon_b0_nic_type}, |
Ben Hutchings | 8880f4e | 2009-11-29 15:15:41 +0000 | [diff] [blame] | 1993 | {PCI_DEVICE(EFX_VENDID_SFC, BETHPAGE_A_P_DEVID), |
| 1994 | .driver_data = (unsigned long) &siena_a0_nic_type}, |
| 1995 | {PCI_DEVICE(EFX_VENDID_SFC, SIENA_A_P_DEVID), |
| 1996 | .driver_data = (unsigned long) &siena_a0_nic_type}, |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1997 | {0} /* end of list */ |
| 1998 | }; |
| 1999 | |
| 2000 | /************************************************************************** |
| 2001 | * |
Ben Hutchings | 3759433 | 2009-11-23 16:05:45 +0000 | [diff] [blame] | 2002 | * Dummy PHY/MAC operations |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 2003 | * |
Ben Hutchings | 01aad7b | 2008-09-01 12:48:36 +0100 | [diff] [blame] | 2004 | * Can be used for some unimplemented operations |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 2005 | * Needed so all function pointers are valid and do not have to be tested |
| 2006 | * before use |
| 2007 | * |
| 2008 | **************************************************************************/ |
| 2009 | int efx_port_dummy_op_int(struct efx_nic *efx) |
| 2010 | { |
| 2011 | return 0; |
| 2012 | } |
| 2013 | void efx_port_dummy_op_void(struct efx_nic *efx) {} |
Ben Hutchings | 398468e | 2009-11-23 16:03:45 +0000 | [diff] [blame] | 2014 | void efx_port_dummy_op_set_id_led(struct efx_nic *efx, enum efx_led_mode mode) |
| 2015 | { |
| 2016 | } |
Steve Hodgson | fdaa9ae | 2009-11-28 05:34:05 +0000 | [diff] [blame] | 2017 | bool efx_port_dummy_op_poll(struct efx_nic *efx) |
| 2018 | { |
| 2019 | return false; |
| 2020 | } |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 2021 | |
| 2022 | static struct efx_phy_operations efx_dummy_phy_operations = { |
| 2023 | .init = efx_port_dummy_op_int, |
Ben Hutchings | d3245b2 | 2009-11-29 03:42:41 +0000 | [diff] [blame] | 2024 | .reconfigure = efx_port_dummy_op_int, |
Steve Hodgson | fdaa9ae | 2009-11-28 05:34:05 +0000 | [diff] [blame] | 2025 | .poll = efx_port_dummy_op_poll, |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 2026 | .fini = efx_port_dummy_op_void, |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 2027 | }; |
| 2028 | |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 2029 | /************************************************************************** |
| 2030 | * |
| 2031 | * Data housekeeping |
| 2032 | * |
| 2033 | **************************************************************************/ |
| 2034 | |
| 2035 | /* This zeroes out and then fills in the invariants in a struct |
| 2036 | * efx_nic (including all sub-structures). |
| 2037 | */ |
| 2038 | static int efx_init_struct(struct efx_nic *efx, struct efx_nic_type *type, |
| 2039 | struct pci_dev *pci_dev, struct net_device *net_dev) |
| 2040 | { |
| 2041 | struct efx_channel *channel; |
| 2042 | struct efx_tx_queue *tx_queue; |
| 2043 | struct efx_rx_queue *rx_queue; |
Steve Hodgson | 1ab0062 | 2008-12-12 21:33:02 -0800 | [diff] [blame] | 2044 | int i; |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 2045 | |
| 2046 | /* Initialise common structures */ |
| 2047 | memset(efx, 0, sizeof(*efx)); |
| 2048 | spin_lock_init(&efx->biu_lock); |
Steve Hodgson | ab86746 | 2009-11-28 05:34:44 +0000 | [diff] [blame] | 2049 | mutex_init(&efx->mdio_lock); |
Ben Hutchings | f415072 | 2008-11-04 20:34:28 +0000 | [diff] [blame] | 2050 | mutex_init(&efx->spi_lock); |
Ben Hutchings | 7688483 | 2009-11-29 15:10:44 +0000 | [diff] [blame] | 2051 | #ifdef CONFIG_SFC_MTD |
| 2052 | INIT_LIST_HEAD(&efx->mtd_list); |
| 2053 | #endif |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 2054 | INIT_WORK(&efx->reset_work, efx_reset_work); |
| 2055 | INIT_DELAYED_WORK(&efx->monitor_work, efx_monitor); |
| 2056 | efx->pci_dev = pci_dev; |
Ben Hutchings | 62776d0 | 2010-06-23 11:30:07 +0000 | [diff] [blame] | 2057 | efx->msg_enable = debug; |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 2058 | efx->state = STATE_INIT; |
| 2059 | efx->reset_pending = RESET_TYPE_NONE; |
| 2060 | strlcpy(efx->name, pci_name(pci_dev), sizeof(efx->name)); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 2061 | |
| 2062 | efx->net_dev = net_dev; |
Ben Hutchings | dc8cfa5 | 2008-09-01 12:46:50 +0100 | [diff] [blame] | 2063 | efx->rx_checksum_enabled = true; |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 2064 | spin_lock_init(&efx->stats_lock); |
| 2065 | mutex_init(&efx->mac_lock); |
Steve Hodgson | b895d73 | 2009-11-28 05:35:00 +0000 | [diff] [blame] | 2066 | efx->mac_op = type->default_mac_ops; |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 2067 | efx->phy_op = &efx_dummy_phy_operations; |
Ben Hutchings | 68e7f45 | 2009-04-29 08:05:08 +0000 | [diff] [blame] | 2068 | efx->mdio.dev = net_dev; |
Ben Hutchings | 766ca0f | 2008-12-12 21:59:24 -0800 | [diff] [blame] | 2069 | INIT_WORK(&efx->mac_work, efx_mac_work); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 2070 | |
| 2071 | for (i = 0; i < EFX_MAX_CHANNELS; i++) { |
| 2072 | channel = &efx->channel[i]; |
| 2073 | channel->efx = efx; |
| 2074 | channel->channel = i; |
Ben Hutchings | dc8cfa5 | 2008-09-01 12:46:50 +0100 | [diff] [blame] | 2075 | channel->work_pending = false; |
Ben Hutchings | a4900ac | 2010-04-28 09:30:43 +0000 | [diff] [blame] | 2076 | spin_lock_init(&channel->tx_stop_lock); |
| 2077 | atomic_set(&channel->tx_stop_count, 1); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 2078 | } |
Ben Hutchings | a4900ac | 2010-04-28 09:30:43 +0000 | [diff] [blame] | 2079 | for (i = 0; i < EFX_MAX_TX_QUEUES; i++) { |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 2080 | tx_queue = &efx->tx_queue[i]; |
| 2081 | tx_queue->efx = efx; |
| 2082 | tx_queue->queue = i; |
| 2083 | tx_queue->buffer = NULL; |
| 2084 | tx_queue->channel = &efx->channel[0]; /* for safety */ |
Ben Hutchings | b9b39b6 | 2008-05-07 12:51:12 +0100 | [diff] [blame] | 2085 | tx_queue->tso_headers_free = NULL; |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 2086 | } |
| 2087 | for (i = 0; i < EFX_MAX_RX_QUEUES; i++) { |
| 2088 | rx_queue = &efx->rx_queue[i]; |
| 2089 | rx_queue->efx = efx; |
| 2090 | rx_queue->queue = i; |
| 2091 | rx_queue->channel = &efx->channel[0]; /* for safety */ |
| 2092 | rx_queue->buffer = NULL; |
Steve Hodgson | 90d683a | 2010-06-01 11:19:39 +0000 | [diff] [blame] | 2093 | setup_timer(&rx_queue->slow_fill, efx_rx_slow_fill, |
| 2094 | (unsigned long)rx_queue); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 2095 | } |
| 2096 | |
| 2097 | efx->type = type; |
| 2098 | |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 2099 | /* As close as we can get to guaranteeing that we don't overflow */ |
Ben Hutchings | 3ffeabd | 2009-10-23 08:30:58 +0000 | [diff] [blame] | 2100 | BUILD_BUG_ON(EFX_EVQ_SIZE < EFX_TXQ_SIZE + EFX_RXQ_SIZE); |
| 2101 | |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 2102 | EFX_BUG_ON_PARANOID(efx->type->phys_addr_channels > EFX_MAX_CHANNELS); |
| 2103 | |
| 2104 | /* Higher numbered interrupt modes are less capable! */ |
| 2105 | efx->interrupt_mode = max(efx->type->max_interrupt_mode, |
| 2106 | interrupt_mode); |
| 2107 | |
Ben Hutchings | 6977dc6 | 2008-12-26 13:44:39 -0800 | [diff] [blame] | 2108 | /* Would be good to use the net_dev name, but we're too early */ |
| 2109 | snprintf(efx->workqueue_name, sizeof(efx->workqueue_name), "sfc%s", |
| 2110 | pci_name(pci_dev)); |
| 2111 | efx->workqueue = create_singlethread_workqueue(efx->workqueue_name); |
Steve Hodgson | 1ab0062 | 2008-12-12 21:33:02 -0800 | [diff] [blame] | 2112 | if (!efx->workqueue) |
| 2113 | return -ENOMEM; |
Ben Hutchings | 8d9853d | 2008-07-18 19:01:20 +0100 | [diff] [blame] | 2114 | |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 2115 | return 0; |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 2116 | } |
| 2117 | |
| 2118 | static void efx_fini_struct(struct efx_nic *efx) |
| 2119 | { |
| 2120 | if (efx->workqueue) { |
| 2121 | destroy_workqueue(efx->workqueue); |
| 2122 | efx->workqueue = NULL; |
| 2123 | } |
| 2124 | } |
| 2125 | |
| 2126 | /************************************************************************** |
| 2127 | * |
| 2128 | * PCI interface |
| 2129 | * |
| 2130 | **************************************************************************/ |
| 2131 | |
| 2132 | /* Main body of final NIC shutdown code |
| 2133 | * This is called only at module unload (or hotplug removal). |
| 2134 | */ |
| 2135 | static void efx_pci_remove_main(struct efx_nic *efx) |
| 2136 | { |
Ben Hutchings | 152b6a6 | 2009-11-29 03:43:56 +0000 | [diff] [blame] | 2137 | efx_nic_fini_interrupt(efx); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 2138 | efx_fini_channels(efx); |
| 2139 | efx_fini_port(efx); |
Ben Hutchings | ef2b90e | 2009-11-29 03:42:31 +0000 | [diff] [blame] | 2140 | efx->type->fini(efx); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 2141 | efx_fini_napi(efx); |
| 2142 | efx_remove_all(efx); |
| 2143 | } |
| 2144 | |
| 2145 | /* Final NIC shutdown |
| 2146 | * This is called only at module unload (or hotplug removal). |
| 2147 | */ |
| 2148 | static void efx_pci_remove(struct pci_dev *pci_dev) |
| 2149 | { |
| 2150 | struct efx_nic *efx; |
| 2151 | |
| 2152 | efx = pci_get_drvdata(pci_dev); |
| 2153 | if (!efx) |
| 2154 | return; |
| 2155 | |
| 2156 | /* Mark the NIC as fini, then stop the interface */ |
| 2157 | rtnl_lock(); |
| 2158 | efx->state = STATE_FINI; |
| 2159 | dev_close(efx->net_dev); |
| 2160 | |
| 2161 | /* Allow any queued efx_resets() to complete */ |
| 2162 | rtnl_unlock(); |
| 2163 | |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 2164 | efx_unregister_netdev(efx); |
| 2165 | |
Ben Hutchings | 7dde596 | 2008-12-12 22:09:38 -0800 | [diff] [blame] | 2166 | efx_mtd_remove(efx); |
| 2167 | |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 2168 | /* Wait for any scheduled resets to complete. No more will be |
| 2169 | * scheduled from this point because efx_stop_all() has been |
| 2170 | * called, we are no longer registered with driverlink, and |
| 2171 | * the net_device's have been removed. */ |
Steve Hodgson | 1ab0062 | 2008-12-12 21:33:02 -0800 | [diff] [blame] | 2172 | cancel_work_sync(&efx->reset_work); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 2173 | |
| 2174 | efx_pci_remove_main(efx); |
| 2175 | |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 2176 | efx_fini_io(efx); |
Ben Hutchings | 62776d0 | 2010-06-23 11:30:07 +0000 | [diff] [blame] | 2177 | netif_dbg(efx, drv, efx->net_dev, "shutdown successful\n"); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 2178 | |
| 2179 | pci_set_drvdata(pci_dev, NULL); |
| 2180 | efx_fini_struct(efx); |
| 2181 | free_netdev(efx->net_dev); |
| 2182 | }; |
| 2183 | |
| 2184 | /* Main body of NIC initialisation |
| 2185 | * This is called at module load (or hotplug insertion, theoretically). |
| 2186 | */ |
| 2187 | static int efx_pci_probe_main(struct efx_nic *efx) |
| 2188 | { |
| 2189 | int rc; |
| 2190 | |
| 2191 | /* Do start-of-day initialisation */ |
| 2192 | rc = efx_probe_all(efx); |
| 2193 | if (rc) |
| 2194 | goto fail1; |
| 2195 | |
| 2196 | rc = efx_init_napi(efx); |
| 2197 | if (rc) |
| 2198 | goto fail2; |
| 2199 | |
Ben Hutchings | ef2b90e | 2009-11-29 03:42:31 +0000 | [diff] [blame] | 2200 | rc = efx->type->init(efx); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 2201 | if (rc) { |
Ben Hutchings | 62776d0 | 2010-06-23 11:30:07 +0000 | [diff] [blame] | 2202 | netif_err(efx, probe, efx->net_dev, |
| 2203 | "failed to initialise NIC\n"); |
Ben Hutchings | 278c062 | 2009-11-23 16:05:12 +0000 | [diff] [blame] | 2204 | goto fail3; |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 2205 | } |
| 2206 | |
| 2207 | rc = efx_init_port(efx); |
| 2208 | if (rc) { |
Ben Hutchings | 62776d0 | 2010-06-23 11:30:07 +0000 | [diff] [blame] | 2209 | netif_err(efx, probe, efx->net_dev, |
| 2210 | "failed to initialise port\n"); |
Ben Hutchings | 278c062 | 2009-11-23 16:05:12 +0000 | [diff] [blame] | 2211 | goto fail4; |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 2212 | } |
| 2213 | |
Ben Hutchings | bc3c90a | 2008-09-01 12:48:46 +0100 | [diff] [blame] | 2214 | efx_init_channels(efx); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 2215 | |
Ben Hutchings | 152b6a6 | 2009-11-29 03:43:56 +0000 | [diff] [blame] | 2216 | rc = efx_nic_init_interrupt(efx); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 2217 | if (rc) |
Ben Hutchings | 278c062 | 2009-11-23 16:05:12 +0000 | [diff] [blame] | 2218 | goto fail5; |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 2219 | |
| 2220 | return 0; |
| 2221 | |
Ben Hutchings | 278c062 | 2009-11-23 16:05:12 +0000 | [diff] [blame] | 2222 | fail5: |
Ben Hutchings | bc3c90a | 2008-09-01 12:48:46 +0100 | [diff] [blame] | 2223 | efx_fini_channels(efx); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 2224 | efx_fini_port(efx); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 2225 | fail4: |
Ben Hutchings | ef2b90e | 2009-11-29 03:42:31 +0000 | [diff] [blame] | 2226 | efx->type->fini(efx); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 2227 | fail3: |
| 2228 | efx_fini_napi(efx); |
| 2229 | fail2: |
| 2230 | efx_remove_all(efx); |
| 2231 | fail1: |
| 2232 | return rc; |
| 2233 | } |
| 2234 | |
| 2235 | /* NIC initialisation |
| 2236 | * |
| 2237 | * This is called at module load (or hotplug insertion, |
| 2238 | * theoretically). It sets up PCI mappings, tests and resets the NIC, |
| 2239 | * sets up and registers the network devices with the kernel and hooks |
| 2240 | * the interrupt service routine. It does not prepare the device for |
| 2241 | * transmission; this is left to the first time one of the network |
| 2242 | * interfaces is brought up (i.e. efx_net_open). |
| 2243 | */ |
| 2244 | static int __devinit efx_pci_probe(struct pci_dev *pci_dev, |
| 2245 | const struct pci_device_id *entry) |
| 2246 | { |
| 2247 | struct efx_nic_type *type = (struct efx_nic_type *) entry->driver_data; |
| 2248 | struct net_device *net_dev; |
| 2249 | struct efx_nic *efx; |
| 2250 | int i, rc; |
| 2251 | |
| 2252 | /* Allocate and initialise a struct net_device and struct efx_nic */ |
Ben Hutchings | a4900ac | 2010-04-28 09:30:43 +0000 | [diff] [blame] | 2253 | net_dev = alloc_etherdev_mq(sizeof(*efx), EFX_MAX_CORE_TX_QUEUES); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 2254 | if (!net_dev) |
| 2255 | return -ENOMEM; |
Ben Hutchings | c383b53 | 2009-11-29 15:11:02 +0000 | [diff] [blame] | 2256 | net_dev->features |= (type->offload_features | NETIF_F_SG | |
Ben Hutchings | 97bc541 | 2009-05-19 16:19:08 -0700 | [diff] [blame] | 2257 | NETIF_F_HIGHDMA | NETIF_F_TSO | |
| 2258 | NETIF_F_GRO); |
Ben Hutchings | 738a8f4 | 2009-11-29 15:16:05 +0000 | [diff] [blame] | 2259 | if (type->offload_features & NETIF_F_V6_CSUM) |
| 2260 | net_dev->features |= NETIF_F_TSO6; |
Ben Hutchings | 28506563 | 2008-09-01 12:46:54 +0100 | [diff] [blame] | 2261 | /* Mask for features that also apply to VLAN devices */ |
| 2262 | net_dev->vlan_features |= (NETIF_F_ALL_CSUM | NETIF_F_SG | |
Ben Hutchings | 740847d | 2008-09-01 12:48:23 +0100 | [diff] [blame] | 2263 | NETIF_F_HIGHDMA | NETIF_F_TSO); |
Ben Hutchings | 767e468 | 2008-09-01 12:43:14 +0100 | [diff] [blame] | 2264 | efx = netdev_priv(net_dev); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 2265 | pci_set_drvdata(pci_dev, efx); |
Ben Hutchings | 62776d0 | 2010-06-23 11:30:07 +0000 | [diff] [blame] | 2266 | SET_NETDEV_DEV(net_dev, &pci_dev->dev); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 2267 | rc = efx_init_struct(efx, type, pci_dev, net_dev); |
| 2268 | if (rc) |
| 2269 | goto fail1; |
| 2270 | |
Ben Hutchings | 62776d0 | 2010-06-23 11:30:07 +0000 | [diff] [blame] | 2271 | netif_info(efx, probe, efx->net_dev, |
| 2272 | "Solarflare Communications NIC detected\n"); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 2273 | |
| 2274 | /* Set up basic I/O (BAR mappings etc) */ |
| 2275 | rc = efx_init_io(efx); |
| 2276 | if (rc) |
| 2277 | goto fail2; |
| 2278 | |
| 2279 | /* No serialisation is required with the reset path because |
| 2280 | * we're in STATE_INIT. */ |
| 2281 | for (i = 0; i < 5; i++) { |
| 2282 | rc = efx_pci_probe_main(efx); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 2283 | |
| 2284 | /* Serialise against efx_reset(). No more resets will be |
| 2285 | * scheduled since efx_stop_all() has been called, and we |
| 2286 | * have not and never have been registered with either |
| 2287 | * the rtnetlink or driverlink layers. */ |
Steve Hodgson | 1ab0062 | 2008-12-12 21:33:02 -0800 | [diff] [blame] | 2288 | cancel_work_sync(&efx->reset_work); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 2289 | |
Steve Hodgson | fa402b2 | 2008-12-12 22:08:16 -0800 | [diff] [blame] | 2290 | if (rc == 0) { |
| 2291 | if (efx->reset_pending != RESET_TYPE_NONE) { |
| 2292 | /* If there was a scheduled reset during |
| 2293 | * probe, the NIC is probably hosed anyway */ |
| 2294 | efx_pci_remove_main(efx); |
| 2295 | rc = -EIO; |
| 2296 | } else { |
| 2297 | break; |
| 2298 | } |
| 2299 | } |
| 2300 | |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 2301 | /* Retry if a recoverably reset event has been scheduled */ |
| 2302 | if ((efx->reset_pending != RESET_TYPE_INVISIBLE) && |
| 2303 | (efx->reset_pending != RESET_TYPE_ALL)) |
| 2304 | goto fail3; |
| 2305 | |
| 2306 | efx->reset_pending = RESET_TYPE_NONE; |
| 2307 | } |
| 2308 | |
| 2309 | if (rc) { |
Ben Hutchings | 62776d0 | 2010-06-23 11:30:07 +0000 | [diff] [blame] | 2310 | netif_err(efx, probe, efx->net_dev, "Could not reset NIC\n"); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 2311 | goto fail4; |
| 2312 | } |
| 2313 | |
Ben Hutchings | 55edc6e | 2009-11-25 16:11:35 +0000 | [diff] [blame] | 2314 | /* Switch to the running state before we expose the device to the OS, |
| 2315 | * so that dev_open()|efx_start_all() will actually start the device */ |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 2316 | efx->state = STATE_RUNNING; |
Ben Hutchings | 7dde596 | 2008-12-12 22:09:38 -0800 | [diff] [blame] | 2317 | |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 2318 | rc = efx_register_netdev(efx); |
| 2319 | if (rc) |
| 2320 | goto fail5; |
| 2321 | |
Ben Hutchings | 62776d0 | 2010-06-23 11:30:07 +0000 | [diff] [blame] | 2322 | netif_dbg(efx, probe, efx->net_dev, "initialisation successful\n"); |
Ben Hutchings | a5211bb | 2009-10-23 08:33:09 +0000 | [diff] [blame] | 2323 | |
| 2324 | rtnl_lock(); |
| 2325 | efx_mtd_probe(efx); /* allowed to fail */ |
| 2326 | rtnl_unlock(); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 2327 | return 0; |
| 2328 | |
| 2329 | fail5: |
| 2330 | efx_pci_remove_main(efx); |
| 2331 | fail4: |
| 2332 | fail3: |
| 2333 | efx_fini_io(efx); |
| 2334 | fail2: |
| 2335 | efx_fini_struct(efx); |
| 2336 | fail1: |
Steve Hodgson | 5e2a911 | 2010-02-12 12:32:27 -0800 | [diff] [blame] | 2337 | WARN_ON(rc > 0); |
Ben Hutchings | 62776d0 | 2010-06-23 11:30:07 +0000 | [diff] [blame] | 2338 | netif_dbg(efx, drv, efx->net_dev, "initialisation failed. rc=%d\n", rc); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 2339 | free_netdev(net_dev); |
| 2340 | return rc; |
| 2341 | } |
| 2342 | |
Ben Hutchings | 89c758f | 2009-11-29 03:43:07 +0000 | [diff] [blame] | 2343 | static int efx_pm_freeze(struct device *dev) |
| 2344 | { |
| 2345 | struct efx_nic *efx = pci_get_drvdata(to_pci_dev(dev)); |
| 2346 | |
| 2347 | efx->state = STATE_FINI; |
| 2348 | |
| 2349 | netif_device_detach(efx->net_dev); |
| 2350 | |
| 2351 | efx_stop_all(efx); |
| 2352 | efx_fini_channels(efx); |
| 2353 | |
| 2354 | return 0; |
| 2355 | } |
| 2356 | |
| 2357 | static int efx_pm_thaw(struct device *dev) |
| 2358 | { |
| 2359 | struct efx_nic *efx = pci_get_drvdata(to_pci_dev(dev)); |
| 2360 | |
| 2361 | efx->state = STATE_INIT; |
| 2362 | |
| 2363 | efx_init_channels(efx); |
| 2364 | |
| 2365 | mutex_lock(&efx->mac_lock); |
| 2366 | efx->phy_op->reconfigure(efx); |
| 2367 | mutex_unlock(&efx->mac_lock); |
| 2368 | |
| 2369 | efx_start_all(efx); |
| 2370 | |
| 2371 | netif_device_attach(efx->net_dev); |
| 2372 | |
| 2373 | efx->state = STATE_RUNNING; |
| 2374 | |
| 2375 | efx->type->resume_wol(efx); |
| 2376 | |
Steve Hodgson | 319ba64 | 2010-06-01 11:17:24 +0000 | [diff] [blame] | 2377 | /* Reschedule any quenched resets scheduled during efx_pm_freeze() */ |
| 2378 | queue_work(reset_workqueue, &efx->reset_work); |
| 2379 | |
Ben Hutchings | 89c758f | 2009-11-29 03:43:07 +0000 | [diff] [blame] | 2380 | return 0; |
| 2381 | } |
| 2382 | |
| 2383 | static int efx_pm_poweroff(struct device *dev) |
| 2384 | { |
| 2385 | struct pci_dev *pci_dev = to_pci_dev(dev); |
| 2386 | struct efx_nic *efx = pci_get_drvdata(pci_dev); |
| 2387 | |
| 2388 | efx->type->fini(efx); |
| 2389 | |
| 2390 | efx->reset_pending = RESET_TYPE_NONE; |
| 2391 | |
| 2392 | pci_save_state(pci_dev); |
| 2393 | return pci_set_power_state(pci_dev, PCI_D3hot); |
| 2394 | } |
| 2395 | |
| 2396 | /* Used for both resume and restore */ |
| 2397 | static int efx_pm_resume(struct device *dev) |
| 2398 | { |
| 2399 | struct pci_dev *pci_dev = to_pci_dev(dev); |
| 2400 | struct efx_nic *efx = pci_get_drvdata(pci_dev); |
| 2401 | int rc; |
| 2402 | |
| 2403 | rc = pci_set_power_state(pci_dev, PCI_D0); |
| 2404 | if (rc) |
| 2405 | return rc; |
| 2406 | pci_restore_state(pci_dev); |
| 2407 | rc = pci_enable_device(pci_dev); |
| 2408 | if (rc) |
| 2409 | return rc; |
| 2410 | pci_set_master(efx->pci_dev); |
| 2411 | rc = efx->type->reset(efx, RESET_TYPE_ALL); |
| 2412 | if (rc) |
| 2413 | return rc; |
| 2414 | rc = efx->type->init(efx); |
| 2415 | if (rc) |
| 2416 | return rc; |
| 2417 | efx_pm_thaw(dev); |
| 2418 | return 0; |
| 2419 | } |
| 2420 | |
| 2421 | static int efx_pm_suspend(struct device *dev) |
| 2422 | { |
| 2423 | int rc; |
| 2424 | |
| 2425 | efx_pm_freeze(dev); |
| 2426 | rc = efx_pm_poweroff(dev); |
| 2427 | if (rc) |
| 2428 | efx_pm_resume(dev); |
| 2429 | return rc; |
| 2430 | } |
| 2431 | |
| 2432 | static struct dev_pm_ops efx_pm_ops = { |
| 2433 | .suspend = efx_pm_suspend, |
| 2434 | .resume = efx_pm_resume, |
| 2435 | .freeze = efx_pm_freeze, |
| 2436 | .thaw = efx_pm_thaw, |
| 2437 | .poweroff = efx_pm_poweroff, |
| 2438 | .restore = efx_pm_resume, |
| 2439 | }; |
| 2440 | |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 2441 | static struct pci_driver efx_pci_driver = { |
Ben Hutchings | c5d5f5f | 2010-06-23 11:30:26 +0000 | [diff] [blame] | 2442 | .name = KBUILD_MODNAME, |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 2443 | .id_table = efx_pci_table, |
| 2444 | .probe = efx_pci_probe, |
| 2445 | .remove = efx_pci_remove, |
Ben Hutchings | 89c758f | 2009-11-29 03:43:07 +0000 | [diff] [blame] | 2446 | .driver.pm = &efx_pm_ops, |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 2447 | }; |
| 2448 | |
| 2449 | /************************************************************************** |
| 2450 | * |
| 2451 | * Kernel module interface |
| 2452 | * |
| 2453 | *************************************************************************/ |
| 2454 | |
| 2455 | module_param(interrupt_mode, uint, 0444); |
| 2456 | MODULE_PARM_DESC(interrupt_mode, |
| 2457 | "Interrupt mode (0=>MSIX 1=>MSI 2=>legacy)"); |
| 2458 | |
| 2459 | static int __init efx_init_module(void) |
| 2460 | { |
| 2461 | int rc; |
| 2462 | |
| 2463 | printk(KERN_INFO "Solarflare NET driver v" EFX_DRIVER_VERSION "\n"); |
| 2464 | |
| 2465 | rc = register_netdevice_notifier(&efx_netdev_notifier); |
| 2466 | if (rc) |
| 2467 | goto err_notifier; |
| 2468 | |
Steve Hodgson | 1ab0062 | 2008-12-12 21:33:02 -0800 | [diff] [blame] | 2469 | reset_workqueue = create_singlethread_workqueue("sfc_reset"); |
| 2470 | if (!reset_workqueue) { |
| 2471 | rc = -ENOMEM; |
| 2472 | goto err_reset; |
| 2473 | } |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 2474 | |
| 2475 | rc = pci_register_driver(&efx_pci_driver); |
| 2476 | if (rc < 0) |
| 2477 | goto err_pci; |
| 2478 | |
| 2479 | return 0; |
| 2480 | |
| 2481 | err_pci: |
Steve Hodgson | 1ab0062 | 2008-12-12 21:33:02 -0800 | [diff] [blame] | 2482 | destroy_workqueue(reset_workqueue); |
| 2483 | err_reset: |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 2484 | unregister_netdevice_notifier(&efx_netdev_notifier); |
| 2485 | err_notifier: |
| 2486 | return rc; |
| 2487 | } |
| 2488 | |
| 2489 | static void __exit efx_exit_module(void) |
| 2490 | { |
| 2491 | printk(KERN_INFO "Solarflare NET driver unloading\n"); |
| 2492 | |
| 2493 | pci_unregister_driver(&efx_pci_driver); |
Steve Hodgson | 1ab0062 | 2008-12-12 21:33:02 -0800 | [diff] [blame] | 2494 | destroy_workqueue(reset_workqueue); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 2495 | unregister_netdevice_notifier(&efx_netdev_notifier); |
| 2496 | |
| 2497 | } |
| 2498 | |
| 2499 | module_init(efx_init_module); |
| 2500 | module_exit(efx_exit_module); |
| 2501 | |
Ben Hutchings | 906bb26 | 2009-11-29 15:16:19 +0000 | [diff] [blame] | 2502 | MODULE_AUTHOR("Solarflare Communications and " |
| 2503 | "Michael Brown <mbrown@fensystems.co.uk>"); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 2504 | MODULE_DESCRIPTION("Solarflare Communications network driver"); |
| 2505 | MODULE_LICENSE("GPL"); |
| 2506 | MODULE_DEVICE_TABLE(pci, efx_pci_table); |