1874aeea5SJeff Kirsher /**************************************************************************** 2f7a6d2c4SBen Hutchings * Driver for Solarflare network controllers and boards 3874aeea5SJeff Kirsher * Copyright 2005-2006 Fen Systems Ltd. 4f7a6d2c4SBen Hutchings * Copyright 2005-2013 Solarflare Communications Inc. 5874aeea5SJeff Kirsher * 6874aeea5SJeff Kirsher * This program is free software; you can redistribute it and/or modify it 7874aeea5SJeff Kirsher * under the terms of the GNU General Public License version 2 as published 8874aeea5SJeff Kirsher * by the Free Software Foundation, incorporated herein by reference. 9874aeea5SJeff Kirsher */ 10874aeea5SJeff Kirsher 11874aeea5SJeff Kirsher #include <linux/module.h> 12874aeea5SJeff Kirsher #include <linux/pci.h> 13874aeea5SJeff Kirsher #include <linux/netdevice.h> 14874aeea5SJeff Kirsher #include <linux/etherdevice.h> 15874aeea5SJeff Kirsher #include <linux/delay.h> 16874aeea5SJeff Kirsher #include <linux/notifier.h> 17874aeea5SJeff Kirsher #include <linux/ip.h> 18874aeea5SJeff Kirsher #include <linux/tcp.h> 19874aeea5SJeff Kirsher #include <linux/in.h> 20874aeea5SJeff Kirsher #include <linux/ethtool.h> 21874aeea5SJeff Kirsher #include <linux/topology.h> 22874aeea5SJeff Kirsher #include <linux/gfp.h> 23626950dbSAlexandre Rames #include <linux/aer.h> 24b28405b0SAlexandre Rames #include <linux/interrupt.h> 25874aeea5SJeff Kirsher #include "net_driver.h" 26874aeea5SJeff Kirsher #include "efx.h" 27874aeea5SJeff Kirsher #include "nic.h" 28dd40781eSBen Hutchings #include "selftest.h" 297fa8d547SShradha Shah #include "sriov.h" 30874aeea5SJeff Kirsher 31874aeea5SJeff Kirsher #include "mcdi.h" 32874aeea5SJeff Kirsher #include "workarounds.h" 33874aeea5SJeff Kirsher 34874aeea5SJeff Kirsher /************************************************************************** 35874aeea5SJeff Kirsher * 36874aeea5SJeff Kirsher * Type name strings 37874aeea5SJeff Kirsher * 38874aeea5SJeff Kirsher ************************************************************************** 39874aeea5SJeff Kirsher */ 40874aeea5SJeff Kirsher 41874aeea5SJeff Kirsher /* Loopback mode names (see LOOPBACK_MODE()) */ 42874aeea5SJeff Kirsher const unsigned int efx_loopback_mode_max = LOOPBACK_MAX; 4318e83e4cSBen Hutchings const char *const efx_loopback_mode_names[] = { 44874aeea5SJeff Kirsher [LOOPBACK_NONE] = "NONE", 45874aeea5SJeff Kirsher [LOOPBACK_DATA] = "DATAPATH", 46874aeea5SJeff Kirsher [LOOPBACK_GMAC] = "GMAC", 47874aeea5SJeff Kirsher [LOOPBACK_XGMII] = "XGMII", 48874aeea5SJeff Kirsher [LOOPBACK_XGXS] = "XGXS", 49874aeea5SJeff Kirsher [LOOPBACK_XAUI] = "XAUI", 50874aeea5SJeff Kirsher [LOOPBACK_GMII] = "GMII", 51874aeea5SJeff Kirsher [LOOPBACK_SGMII] = "SGMII", 52874aeea5SJeff Kirsher [LOOPBACK_XGBR] = "XGBR", 53874aeea5SJeff Kirsher [LOOPBACK_XFI] = "XFI", 54874aeea5SJeff Kirsher [LOOPBACK_XAUI_FAR] = "XAUI_FAR", 55874aeea5SJeff Kirsher [LOOPBACK_GMII_FAR] = "GMII_FAR", 56874aeea5SJeff Kirsher [LOOPBACK_SGMII_FAR] = "SGMII_FAR", 57874aeea5SJeff Kirsher [LOOPBACK_XFI_FAR] = "XFI_FAR", 58874aeea5SJeff Kirsher [LOOPBACK_GPHY] = "GPHY", 59874aeea5SJeff Kirsher [LOOPBACK_PHYXS] = "PHYXS", 60874aeea5SJeff Kirsher [LOOPBACK_PCS] = "PCS", 61874aeea5SJeff Kirsher [LOOPBACK_PMAPMD] = "PMA/PMD", 62874aeea5SJeff Kirsher [LOOPBACK_XPORT] = "XPORT", 63874aeea5SJeff Kirsher [LOOPBACK_XGMII_WS] = "XGMII_WS", 64874aeea5SJeff Kirsher [LOOPBACK_XAUI_WS] = "XAUI_WS", 65874aeea5SJeff Kirsher [LOOPBACK_XAUI_WS_FAR] = "XAUI_WS_FAR", 66874aeea5SJeff Kirsher [LOOPBACK_XAUI_WS_NEAR] = "XAUI_WS_NEAR", 67874aeea5SJeff Kirsher [LOOPBACK_GMII_WS] = "GMII_WS", 68874aeea5SJeff Kirsher [LOOPBACK_XFI_WS] = "XFI_WS", 69874aeea5SJeff Kirsher [LOOPBACK_XFI_WS_FAR] = "XFI_WS_FAR", 70874aeea5SJeff Kirsher [LOOPBACK_PHYXS_WS] = "PHYXS_WS", 71874aeea5SJeff Kirsher }; 72874aeea5SJeff Kirsher 73874aeea5SJeff Kirsher const unsigned int efx_reset_type_max = RESET_TYPE_MAX; 7418e83e4cSBen Hutchings const char *const efx_reset_type_names[] = { 75874aeea5SJeff Kirsher [RESET_TYPE_INVISIBLE] = "INVISIBLE", 76874aeea5SJeff Kirsher [RESET_TYPE_ALL] = "ALL", 77626950dbSAlexandre Rames [RESET_TYPE_RECOVER_OR_ALL] = "RECOVER_OR_ALL", 78874aeea5SJeff Kirsher [RESET_TYPE_WORLD] = "WORLD", 79626950dbSAlexandre Rames [RESET_TYPE_RECOVER_OR_DISABLE] = "RECOVER_OR_DISABLE", 80e283546cSEdward Cree [RESET_TYPE_MC_BIST] = "MC_BIST", 81874aeea5SJeff Kirsher [RESET_TYPE_DISABLE] = "DISABLE", 82874aeea5SJeff Kirsher [RESET_TYPE_TX_WATCHDOG] = "TX_WATCHDOG", 83874aeea5SJeff Kirsher [RESET_TYPE_INT_ERROR] = "INT_ERROR", 84874aeea5SJeff Kirsher [RESET_TYPE_RX_RECOVERY] = "RX_RECOVERY", 853de82b91SAlexandre Rames [RESET_TYPE_DMA_ERROR] = "DMA_ERROR", 86874aeea5SJeff Kirsher [RESET_TYPE_TX_SKIP] = "TX_SKIP", 87874aeea5SJeff Kirsher [RESET_TYPE_MC_FAILURE] = "MC_FAILURE", 88e283546cSEdward Cree [RESET_TYPE_MCDI_TIMEOUT] = "MCDI_TIMEOUT (FLR)", 89874aeea5SJeff Kirsher }; 90874aeea5SJeff Kirsher 91874aeea5SJeff Kirsher /* Reset workqueue. If any NIC has a hardware failure then a reset will be 92874aeea5SJeff Kirsher * queued onto this work queue. This is not a per-nic work queue, because 93874aeea5SJeff Kirsher * efx_reset_work() acquires the rtnl lock, so resets are naturally serialised. 94874aeea5SJeff Kirsher */ 95874aeea5SJeff Kirsher static struct workqueue_struct *reset_workqueue; 96874aeea5SJeff Kirsher 9774cd60a4SJon Cooper /* How often and how many times to poll for a reset while waiting for a 9874cd60a4SJon Cooper * BIST that another function started to complete. 9974cd60a4SJon Cooper */ 10074cd60a4SJon Cooper #define BIST_WAIT_DELAY_MS 100 10174cd60a4SJon Cooper #define BIST_WAIT_DELAY_COUNT 100 10274cd60a4SJon Cooper 103874aeea5SJeff Kirsher /************************************************************************** 104874aeea5SJeff Kirsher * 105874aeea5SJeff Kirsher * Configurable values 106874aeea5SJeff Kirsher * 107874aeea5SJeff Kirsher *************************************************************************/ 108874aeea5SJeff Kirsher 109874aeea5SJeff Kirsher /* 110874aeea5SJeff Kirsher * Use separate channels for TX and RX events 111874aeea5SJeff Kirsher * 112874aeea5SJeff Kirsher * Set this to 1 to use separate channels for TX and RX. It allows us 113874aeea5SJeff Kirsher * to control interrupt affinity separately for TX and RX. 114874aeea5SJeff Kirsher * 115874aeea5SJeff Kirsher * This is only used in MSI-X interrupt mode 116874aeea5SJeff Kirsher */ 117b9cc977dSBen Hutchings static bool separate_tx_channels; 118b9cc977dSBen Hutchings module_param(separate_tx_channels, bool, 0444); 119874aeea5SJeff Kirsher MODULE_PARM_DESC(separate_tx_channels, 120874aeea5SJeff Kirsher "Use separate channels for TX and RX"); 121874aeea5SJeff Kirsher 122874aeea5SJeff Kirsher /* This is the weight assigned to each of the (per-channel) virtual 123874aeea5SJeff Kirsher * NAPI devices. 124874aeea5SJeff Kirsher */ 125874aeea5SJeff Kirsher static int napi_weight = 64; 126874aeea5SJeff Kirsher 127874aeea5SJeff Kirsher /* This is the time (in jiffies) between invocations of the hardware 128626950dbSAlexandre Rames * monitor. 129626950dbSAlexandre Rames * On Falcon-based NICs, this will: 130874aeea5SJeff Kirsher * - Check the on-board hardware monitor; 131874aeea5SJeff Kirsher * - Poll the link state and reconfigure the hardware as necessary. 132626950dbSAlexandre Rames * On Siena-based NICs for power systems with EEH support, this will give EEH a 133626950dbSAlexandre Rames * chance to start. 134874aeea5SJeff Kirsher */ 135874aeea5SJeff Kirsher static unsigned int efx_monitor_interval = 1 * HZ; 136874aeea5SJeff Kirsher 137874aeea5SJeff Kirsher /* Initial interrupt moderation settings. They can be modified after 138874aeea5SJeff Kirsher * module load with ethtool. 139874aeea5SJeff Kirsher * 140874aeea5SJeff Kirsher * The default for RX should strike a balance between increasing the 141874aeea5SJeff Kirsher * round-trip latency and reducing overhead. 142874aeea5SJeff Kirsher */ 143874aeea5SJeff Kirsher static unsigned int rx_irq_mod_usec = 60; 144874aeea5SJeff Kirsher 145874aeea5SJeff Kirsher /* Initial interrupt moderation settings. They can be modified after 146874aeea5SJeff Kirsher * module load with ethtool. 147874aeea5SJeff Kirsher * 148874aeea5SJeff Kirsher * This default is chosen to ensure that a 10G link does not go idle 149874aeea5SJeff Kirsher * while a TX queue is stopped after it has become full. A queue is 150874aeea5SJeff Kirsher * restarted when it drops below half full. The time this takes (assuming 151874aeea5SJeff Kirsher * worst case 3 descriptors per packet and 1024 descriptors) is 152874aeea5SJeff Kirsher * 512 / 3 * 1.2 = 205 usec. 153874aeea5SJeff Kirsher */ 154874aeea5SJeff Kirsher static unsigned int tx_irq_mod_usec = 150; 155874aeea5SJeff Kirsher 156874aeea5SJeff Kirsher /* This is the first interrupt mode to try out of: 157874aeea5SJeff Kirsher * 0 => MSI-X 158874aeea5SJeff Kirsher * 1 => MSI 159874aeea5SJeff Kirsher * 2 => legacy 160874aeea5SJeff Kirsher */ 161874aeea5SJeff Kirsher static unsigned int interrupt_mode; 162874aeea5SJeff Kirsher 163874aeea5SJeff Kirsher /* This is the requested number of CPUs to use for Receive-Side Scaling (RSS), 164874aeea5SJeff Kirsher * i.e. the number of CPUs among which we may distribute simultaneous 165874aeea5SJeff Kirsher * interrupt handling. 166874aeea5SJeff Kirsher * 167874aeea5SJeff Kirsher * Cards without MSI-X will only target one CPU via legacy or MSI interrupt. 168cdb08f8fSBen Hutchings * The default (0) means to assign an interrupt to each core. 169874aeea5SJeff Kirsher */ 170874aeea5SJeff Kirsher static unsigned int rss_cpus; 171874aeea5SJeff Kirsher module_param(rss_cpus, uint, 0444); 172874aeea5SJeff Kirsher MODULE_PARM_DESC(rss_cpus, "Number of CPUs to use for Receive-Side Scaling"); 173874aeea5SJeff Kirsher 174b9cc977dSBen Hutchings static bool phy_flash_cfg; 175b9cc977dSBen Hutchings module_param(phy_flash_cfg, bool, 0644); 176874aeea5SJeff Kirsher MODULE_PARM_DESC(phy_flash_cfg, "Set PHYs into reflash mode initially"); 177874aeea5SJeff Kirsher 178e7bed9c8SBen Hutchings static unsigned irq_adapt_low_thresh = 8000; 179874aeea5SJeff Kirsher module_param(irq_adapt_low_thresh, uint, 0644); 180874aeea5SJeff Kirsher MODULE_PARM_DESC(irq_adapt_low_thresh, 181874aeea5SJeff Kirsher "Threshold score for reducing IRQ moderation"); 182874aeea5SJeff Kirsher 183e7bed9c8SBen Hutchings static unsigned irq_adapt_high_thresh = 16000; 184874aeea5SJeff Kirsher module_param(irq_adapt_high_thresh, uint, 0644); 185874aeea5SJeff Kirsher MODULE_PARM_DESC(irq_adapt_high_thresh, 186874aeea5SJeff Kirsher "Threshold score for increasing IRQ moderation"); 187874aeea5SJeff Kirsher 188874aeea5SJeff Kirsher static unsigned debug = (NETIF_MSG_DRV | NETIF_MSG_PROBE | 189874aeea5SJeff Kirsher NETIF_MSG_LINK | NETIF_MSG_IFDOWN | 190874aeea5SJeff Kirsher NETIF_MSG_IFUP | NETIF_MSG_RX_ERR | 191874aeea5SJeff Kirsher NETIF_MSG_TX_ERR | NETIF_MSG_HW); 192874aeea5SJeff Kirsher module_param(debug, uint, 0); 193874aeea5SJeff Kirsher MODULE_PARM_DESC(debug, "Bitmapped debugging message enable value"); 194874aeea5SJeff Kirsher 195874aeea5SJeff Kirsher /************************************************************************** 196874aeea5SJeff Kirsher * 197874aeea5SJeff Kirsher * Utility functions and prototypes 198874aeea5SJeff Kirsher * 199874aeea5SJeff Kirsher *************************************************************************/ 200874aeea5SJeff Kirsher 201261e4d96SJon Cooper static int efx_soft_enable_interrupts(struct efx_nic *efx); 202d8291187SBen Hutchings static void efx_soft_disable_interrupts(struct efx_nic *efx); 2037f967c01SBen Hutchings static void efx_remove_channel(struct efx_channel *channel); 204874aeea5SJeff Kirsher static void efx_remove_channels(struct efx_nic *efx); 2057f967c01SBen Hutchings static const struct efx_channel_type efx_default_channel_type; 206874aeea5SJeff Kirsher static void efx_remove_port(struct efx_nic *efx); 2077f967c01SBen Hutchings static void efx_init_napi_channel(struct efx_channel *channel); 208874aeea5SJeff Kirsher static void efx_fini_napi(struct efx_nic *efx); 209874aeea5SJeff Kirsher static void efx_fini_napi_channel(struct efx_channel *channel); 210874aeea5SJeff Kirsher static void efx_fini_struct(struct efx_nic *efx); 211874aeea5SJeff Kirsher static void efx_start_all(struct efx_nic *efx); 212874aeea5SJeff Kirsher static void efx_stop_all(struct efx_nic *efx); 213874aeea5SJeff Kirsher 214874aeea5SJeff Kirsher #define EFX_ASSERT_RESET_SERIALISED(efx) \ 215874aeea5SJeff Kirsher do { \ 216f16aeea0SBen Hutchings if ((efx->state == STATE_READY) || \ 217626950dbSAlexandre Rames (efx->state == STATE_RECOVERY) || \ 218874aeea5SJeff Kirsher (efx->state == STATE_DISABLED)) \ 219874aeea5SJeff Kirsher ASSERT_RTNL(); \ 220874aeea5SJeff Kirsher } while (0) 221874aeea5SJeff Kirsher 2228b7325b4SBen Hutchings static int efx_check_disabled(struct efx_nic *efx) 2238b7325b4SBen Hutchings { 224626950dbSAlexandre Rames if (efx->state == STATE_DISABLED || efx->state == STATE_RECOVERY) { 2258b7325b4SBen Hutchings netif_err(efx, drv, efx->net_dev, 2268b7325b4SBen Hutchings "device is disabled due to earlier errors\n"); 2278b7325b4SBen Hutchings return -EIO; 2288b7325b4SBen Hutchings } 2298b7325b4SBen Hutchings return 0; 2308b7325b4SBen Hutchings } 2318b7325b4SBen Hutchings 232874aeea5SJeff Kirsher /************************************************************************** 233874aeea5SJeff Kirsher * 234874aeea5SJeff Kirsher * Event queue processing 235874aeea5SJeff Kirsher * 236874aeea5SJeff Kirsher *************************************************************************/ 237874aeea5SJeff Kirsher 238874aeea5SJeff Kirsher /* Process channel's event queue 239874aeea5SJeff Kirsher * 240874aeea5SJeff Kirsher * This function is responsible for processing the event queue of a 241874aeea5SJeff Kirsher * single channel. The caller must guarantee that this function will 242874aeea5SJeff Kirsher * never be concurrently called more than once on the same channel, 243874aeea5SJeff Kirsher * though different channels may be being processed concurrently. 244874aeea5SJeff Kirsher */ 245874aeea5SJeff Kirsher static int efx_process_channel(struct efx_channel *channel, int budget) 246874aeea5SJeff Kirsher { 247874aeea5SJeff Kirsher int spent; 248874aeea5SJeff Kirsher 2499f2cb71cSBen Hutchings if (unlikely(!channel->enabled)) 250874aeea5SJeff Kirsher return 0; 251874aeea5SJeff Kirsher 252874aeea5SJeff Kirsher spent = efx_nic_process_eventq(channel, budget); 253d9ab7007SBen Hutchings if (spent && efx_channel_has_rx_queue(channel)) { 254d9ab7007SBen Hutchings struct efx_rx_queue *rx_queue = 255d9ab7007SBen Hutchings efx_channel_get_rx_queue(channel); 256874aeea5SJeff Kirsher 257ff734ef4SBen Hutchings efx_rx_flush_packet(channel); 258cce28794SJon Cooper efx_fast_push_rx_descriptors(rx_queue, true); 259d9ab7007SBen Hutchings } 260874aeea5SJeff Kirsher 261874aeea5SJeff Kirsher return spent; 262874aeea5SJeff Kirsher } 263874aeea5SJeff Kirsher 264874aeea5SJeff Kirsher /* NAPI poll handler 265874aeea5SJeff Kirsher * 266874aeea5SJeff Kirsher * NAPI guarantees serialisation of polls of the same device, which 267874aeea5SJeff Kirsher * provides the guarantee required by efx_process_channel(). 268874aeea5SJeff Kirsher */ 269874aeea5SJeff Kirsher static int efx_poll(struct napi_struct *napi, int budget) 270874aeea5SJeff Kirsher { 271874aeea5SJeff Kirsher struct efx_channel *channel = 272874aeea5SJeff Kirsher container_of(napi, struct efx_channel, napi_str); 273874aeea5SJeff Kirsher struct efx_nic *efx = channel->efx; 274874aeea5SJeff Kirsher int spent; 275874aeea5SJeff Kirsher 27636763266SAlexandre Rames if (!efx_channel_lock_napi(channel)) 27736763266SAlexandre Rames return budget; 27836763266SAlexandre Rames 279874aeea5SJeff Kirsher netif_vdbg(efx, intr, efx->net_dev, 280874aeea5SJeff Kirsher "channel %d NAPI poll executing on CPU %d\n", 281874aeea5SJeff Kirsher channel->channel, raw_smp_processor_id()); 282874aeea5SJeff Kirsher 283874aeea5SJeff Kirsher spent = efx_process_channel(channel, budget); 284874aeea5SJeff Kirsher 285874aeea5SJeff Kirsher if (spent < budget) { 2869d9a6973SBen Hutchings if (efx_channel_has_rx_queue(channel) && 287874aeea5SJeff Kirsher efx->irq_rx_adaptive && 288874aeea5SJeff Kirsher unlikely(++channel->irq_count == 1000)) { 289874aeea5SJeff Kirsher if (unlikely(channel->irq_mod_score < 290874aeea5SJeff Kirsher irq_adapt_low_thresh)) { 291874aeea5SJeff Kirsher if (channel->irq_moderation > 1) { 292874aeea5SJeff Kirsher channel->irq_moderation -= 1; 293874aeea5SJeff Kirsher efx->type->push_irq_moderation(channel); 294874aeea5SJeff Kirsher } 295874aeea5SJeff Kirsher } else if (unlikely(channel->irq_mod_score > 296874aeea5SJeff Kirsher irq_adapt_high_thresh)) { 297874aeea5SJeff Kirsher if (channel->irq_moderation < 298874aeea5SJeff Kirsher efx->irq_rx_moderation) { 299874aeea5SJeff Kirsher channel->irq_moderation += 1; 300874aeea5SJeff Kirsher efx->type->push_irq_moderation(channel); 301874aeea5SJeff Kirsher } 302874aeea5SJeff Kirsher } 303874aeea5SJeff Kirsher channel->irq_count = 0; 304874aeea5SJeff Kirsher channel->irq_mod_score = 0; 305874aeea5SJeff Kirsher } 306874aeea5SJeff Kirsher 307874aeea5SJeff Kirsher efx_filter_rfs_expire(channel); 308874aeea5SJeff Kirsher 309874aeea5SJeff Kirsher /* There is no race here; although napi_disable() will 310874aeea5SJeff Kirsher * only wait for napi_complete(), this isn't a problem 311514bedbcSBen Hutchings * since efx_nic_eventq_read_ack() will have no effect if 312874aeea5SJeff Kirsher * interrupts have already been disabled. 313874aeea5SJeff Kirsher */ 314874aeea5SJeff Kirsher napi_complete(napi); 315514bedbcSBen Hutchings efx_nic_eventq_read_ack(channel); 316874aeea5SJeff Kirsher } 317874aeea5SJeff Kirsher 31836763266SAlexandre Rames efx_channel_unlock_napi(channel); 319874aeea5SJeff Kirsher return spent; 320874aeea5SJeff Kirsher } 321874aeea5SJeff Kirsher 322874aeea5SJeff Kirsher /* Create event queue 323874aeea5SJeff Kirsher * Event queue memory allocations are done only once. If the channel 324874aeea5SJeff Kirsher * is reset, the memory buffer will be reused; this guards against 325874aeea5SJeff Kirsher * errors during channel reset and also simplifies interrupt handling. 326874aeea5SJeff Kirsher */ 327874aeea5SJeff Kirsher static int efx_probe_eventq(struct efx_channel *channel) 328874aeea5SJeff Kirsher { 329874aeea5SJeff Kirsher struct efx_nic *efx = channel->efx; 330874aeea5SJeff Kirsher unsigned long entries; 331874aeea5SJeff Kirsher 33286ee5302SBen Hutchings netif_dbg(efx, probe, efx->net_dev, 333874aeea5SJeff Kirsher "chan %d create event queue\n", channel->channel); 334874aeea5SJeff Kirsher 335874aeea5SJeff Kirsher /* Build an event queue with room for one event per tx and rx buffer, 336874aeea5SJeff Kirsher * plus some extra for link state events and MCDI completions. */ 337874aeea5SJeff Kirsher entries = roundup_pow_of_two(efx->rxq_entries + efx->txq_entries + 128); 338874aeea5SJeff Kirsher EFX_BUG_ON_PARANOID(entries > EFX_MAX_EVQ_SIZE); 339874aeea5SJeff Kirsher channel->eventq_mask = max(entries, EFX_MIN_EVQ_SIZE) - 1; 340874aeea5SJeff Kirsher 341874aeea5SJeff Kirsher return efx_nic_probe_eventq(channel); 342874aeea5SJeff Kirsher } 343874aeea5SJeff Kirsher 344874aeea5SJeff Kirsher /* Prepare channel's event queue */ 345261e4d96SJon Cooper static int efx_init_eventq(struct efx_channel *channel) 346874aeea5SJeff Kirsher { 34715acb1ceSBen Hutchings struct efx_nic *efx = channel->efx; 348261e4d96SJon Cooper int rc; 349261e4d96SJon Cooper 350261e4d96SJon Cooper EFX_WARN_ON_PARANOID(channel->eventq_init); 351261e4d96SJon Cooper 35215acb1ceSBen Hutchings netif_dbg(efx, drv, efx->net_dev, 353874aeea5SJeff Kirsher "chan %d init event queue\n", channel->channel); 354874aeea5SJeff Kirsher 355261e4d96SJon Cooper rc = efx_nic_init_eventq(channel); 356261e4d96SJon Cooper if (rc == 0) { 35715acb1ceSBen Hutchings efx->type->push_irq_moderation(channel); 358874aeea5SJeff Kirsher channel->eventq_read_ptr = 0; 359be3fc09cSBen Hutchings channel->eventq_init = true; 360874aeea5SJeff Kirsher } 361261e4d96SJon Cooper return rc; 362261e4d96SJon Cooper } 363874aeea5SJeff Kirsher 3649f2cb71cSBen Hutchings /* Enable event queue processing and NAPI */ 36536763266SAlexandre Rames void efx_start_eventq(struct efx_channel *channel) 3669f2cb71cSBen Hutchings { 3679f2cb71cSBen Hutchings netif_dbg(channel->efx, ifup, channel->efx->net_dev, 3689f2cb71cSBen Hutchings "chan %d start event queue\n", channel->channel); 3699f2cb71cSBen Hutchings 370514bedbcSBen Hutchings /* Make sure the NAPI handler sees the enabled flag set */ 3719f2cb71cSBen Hutchings channel->enabled = true; 3729f2cb71cSBen Hutchings smp_wmb(); 3739f2cb71cSBen Hutchings 37436763266SAlexandre Rames efx_channel_enable(channel); 3759f2cb71cSBen Hutchings napi_enable(&channel->napi_str); 3769f2cb71cSBen Hutchings efx_nic_eventq_read_ack(channel); 3779f2cb71cSBen Hutchings } 3789f2cb71cSBen Hutchings 3799f2cb71cSBen Hutchings /* Disable event queue processing and NAPI */ 38036763266SAlexandre Rames void efx_stop_eventq(struct efx_channel *channel) 3819f2cb71cSBen Hutchings { 3829f2cb71cSBen Hutchings if (!channel->enabled) 3839f2cb71cSBen Hutchings return; 3849f2cb71cSBen Hutchings 3859f2cb71cSBen Hutchings napi_disable(&channel->napi_str); 38636763266SAlexandre Rames while (!efx_channel_disable(channel)) 38736763266SAlexandre Rames usleep_range(1000, 20000); 3889f2cb71cSBen Hutchings channel->enabled = false; 3899f2cb71cSBen Hutchings } 3909f2cb71cSBen Hutchings 391874aeea5SJeff Kirsher static void efx_fini_eventq(struct efx_channel *channel) 392874aeea5SJeff Kirsher { 393be3fc09cSBen Hutchings if (!channel->eventq_init) 394be3fc09cSBen Hutchings return; 395be3fc09cSBen Hutchings 396874aeea5SJeff Kirsher netif_dbg(channel->efx, drv, channel->efx->net_dev, 397874aeea5SJeff Kirsher "chan %d fini event queue\n", channel->channel); 398874aeea5SJeff Kirsher 399874aeea5SJeff Kirsher efx_nic_fini_eventq(channel); 400be3fc09cSBen Hutchings channel->eventq_init = false; 401874aeea5SJeff Kirsher } 402874aeea5SJeff Kirsher 403874aeea5SJeff Kirsher static void efx_remove_eventq(struct efx_channel *channel) 404874aeea5SJeff Kirsher { 405874aeea5SJeff Kirsher netif_dbg(channel->efx, drv, channel->efx->net_dev, 406874aeea5SJeff Kirsher "chan %d remove event queue\n", channel->channel); 407874aeea5SJeff Kirsher 408874aeea5SJeff Kirsher efx_nic_remove_eventq(channel); 409874aeea5SJeff Kirsher } 410874aeea5SJeff Kirsher 411874aeea5SJeff Kirsher /************************************************************************** 412874aeea5SJeff Kirsher * 413874aeea5SJeff Kirsher * Channel handling 414874aeea5SJeff Kirsher * 415874aeea5SJeff Kirsher *************************************************************************/ 416874aeea5SJeff Kirsher 4177f967c01SBen Hutchings /* Allocate and initialise a channel structure. */ 418874aeea5SJeff Kirsher static struct efx_channel * 419874aeea5SJeff Kirsher efx_alloc_channel(struct efx_nic *efx, int i, struct efx_channel *old_channel) 420874aeea5SJeff Kirsher { 421874aeea5SJeff Kirsher struct efx_channel *channel; 422874aeea5SJeff Kirsher struct efx_rx_queue *rx_queue; 423874aeea5SJeff Kirsher struct efx_tx_queue *tx_queue; 424874aeea5SJeff Kirsher int j; 425874aeea5SJeff Kirsher 4267f967c01SBen Hutchings channel = kzalloc(sizeof(*channel), GFP_KERNEL); 4277f967c01SBen Hutchings if (!channel) 4287f967c01SBen Hutchings return NULL; 4297f967c01SBen Hutchings 4307f967c01SBen Hutchings channel->efx = efx; 4317f967c01SBen Hutchings channel->channel = i; 4327f967c01SBen Hutchings channel->type = &efx_default_channel_type; 4337f967c01SBen Hutchings 4347f967c01SBen Hutchings for (j = 0; j < EFX_TXQ_TYPES; j++) { 4357f967c01SBen Hutchings tx_queue = &channel->tx_queue[j]; 4367f967c01SBen Hutchings tx_queue->efx = efx; 4377f967c01SBen Hutchings tx_queue->queue = i * EFX_TXQ_TYPES + j; 4387f967c01SBen Hutchings tx_queue->channel = channel; 4397f967c01SBen Hutchings } 4407f967c01SBen Hutchings 4417f967c01SBen Hutchings rx_queue = &channel->rx_queue; 4427f967c01SBen Hutchings rx_queue->efx = efx; 4437f967c01SBen Hutchings setup_timer(&rx_queue->slow_fill, efx_rx_slow_fill, 4447f967c01SBen Hutchings (unsigned long)rx_queue); 4457f967c01SBen Hutchings 4467f967c01SBen Hutchings return channel; 4477f967c01SBen Hutchings } 4487f967c01SBen Hutchings 4497f967c01SBen Hutchings /* Allocate and initialise a channel structure, copying parameters 4507f967c01SBen Hutchings * (but not resources) from an old channel structure. 4517f967c01SBen Hutchings */ 4527f967c01SBen Hutchings static struct efx_channel * 4537f967c01SBen Hutchings efx_copy_channel(const struct efx_channel *old_channel) 4547f967c01SBen Hutchings { 4557f967c01SBen Hutchings struct efx_channel *channel; 4567f967c01SBen Hutchings struct efx_rx_queue *rx_queue; 4577f967c01SBen Hutchings struct efx_tx_queue *tx_queue; 4587f967c01SBen Hutchings int j; 4597f967c01SBen Hutchings 460874aeea5SJeff Kirsher channel = kmalloc(sizeof(*channel), GFP_KERNEL); 461874aeea5SJeff Kirsher if (!channel) 462874aeea5SJeff Kirsher return NULL; 463874aeea5SJeff Kirsher 464874aeea5SJeff Kirsher *channel = *old_channel; 465874aeea5SJeff Kirsher 466874aeea5SJeff Kirsher channel->napi_dev = NULL; 467874aeea5SJeff Kirsher memset(&channel->eventq, 0, sizeof(channel->eventq)); 468874aeea5SJeff Kirsher 469874aeea5SJeff Kirsher for (j = 0; j < EFX_TXQ_TYPES; j++) { 470874aeea5SJeff Kirsher tx_queue = &channel->tx_queue[j]; 471874aeea5SJeff Kirsher if (tx_queue->channel) 472874aeea5SJeff Kirsher tx_queue->channel = channel; 473874aeea5SJeff Kirsher tx_queue->buffer = NULL; 474874aeea5SJeff Kirsher memset(&tx_queue->txd, 0, sizeof(tx_queue->txd)); 475874aeea5SJeff Kirsher } 476874aeea5SJeff Kirsher 477874aeea5SJeff Kirsher rx_queue = &channel->rx_queue; 4787f967c01SBen Hutchings rx_queue->buffer = NULL; 4797f967c01SBen Hutchings memset(&rx_queue->rxd, 0, sizeof(rx_queue->rxd)); 480874aeea5SJeff Kirsher setup_timer(&rx_queue->slow_fill, efx_rx_slow_fill, 481874aeea5SJeff Kirsher (unsigned long)rx_queue); 482874aeea5SJeff Kirsher 483874aeea5SJeff Kirsher return channel; 484874aeea5SJeff Kirsher } 485874aeea5SJeff Kirsher 486874aeea5SJeff Kirsher static int efx_probe_channel(struct efx_channel *channel) 487874aeea5SJeff Kirsher { 488874aeea5SJeff Kirsher struct efx_tx_queue *tx_queue; 489874aeea5SJeff Kirsher struct efx_rx_queue *rx_queue; 490874aeea5SJeff Kirsher int rc; 491874aeea5SJeff Kirsher 492874aeea5SJeff Kirsher netif_dbg(channel->efx, probe, channel->efx->net_dev, 493874aeea5SJeff Kirsher "creating channel %d\n", channel->channel); 494874aeea5SJeff Kirsher 4957f967c01SBen Hutchings rc = channel->type->pre_probe(channel); 4967f967c01SBen Hutchings if (rc) 4977f967c01SBen Hutchings goto fail; 4987f967c01SBen Hutchings 499874aeea5SJeff Kirsher rc = efx_probe_eventq(channel); 500874aeea5SJeff Kirsher if (rc) 5017f967c01SBen Hutchings goto fail; 502874aeea5SJeff Kirsher 503874aeea5SJeff Kirsher efx_for_each_channel_tx_queue(tx_queue, channel) { 504874aeea5SJeff Kirsher rc = efx_probe_tx_queue(tx_queue); 505874aeea5SJeff Kirsher if (rc) 5067f967c01SBen Hutchings goto fail; 507874aeea5SJeff Kirsher } 508874aeea5SJeff Kirsher 509874aeea5SJeff Kirsher efx_for_each_channel_rx_queue(rx_queue, channel) { 510874aeea5SJeff Kirsher rc = efx_probe_rx_queue(rx_queue); 511874aeea5SJeff Kirsher if (rc) 5127f967c01SBen Hutchings goto fail; 513874aeea5SJeff Kirsher } 514874aeea5SJeff Kirsher 515874aeea5SJeff Kirsher return 0; 516874aeea5SJeff Kirsher 5177f967c01SBen Hutchings fail: 5187f967c01SBen Hutchings efx_remove_channel(channel); 519874aeea5SJeff Kirsher return rc; 520874aeea5SJeff Kirsher } 521874aeea5SJeff Kirsher 5227f967c01SBen Hutchings static void 5237f967c01SBen Hutchings efx_get_channel_name(struct efx_channel *channel, char *buf, size_t len) 5247f967c01SBen Hutchings { 5257f967c01SBen Hutchings struct efx_nic *efx = channel->efx; 5267f967c01SBen Hutchings const char *type; 5277f967c01SBen Hutchings int number; 5287f967c01SBen Hutchings 5297f967c01SBen Hutchings number = channel->channel; 5307f967c01SBen Hutchings if (efx->tx_channel_offset == 0) { 5317f967c01SBen Hutchings type = ""; 5327f967c01SBen Hutchings } else if (channel->channel < efx->tx_channel_offset) { 5337f967c01SBen Hutchings type = "-rx"; 5347f967c01SBen Hutchings } else { 5357f967c01SBen Hutchings type = "-tx"; 5367f967c01SBen Hutchings number -= efx->tx_channel_offset; 5377f967c01SBen Hutchings } 5387f967c01SBen Hutchings snprintf(buf, len, "%s%s-%d", efx->name, type, number); 5397f967c01SBen Hutchings } 540874aeea5SJeff Kirsher 541874aeea5SJeff Kirsher static void efx_set_channel_names(struct efx_nic *efx) 542874aeea5SJeff Kirsher { 543874aeea5SJeff Kirsher struct efx_channel *channel; 544874aeea5SJeff Kirsher 5457f967c01SBen Hutchings efx_for_each_channel(channel, efx) 5467f967c01SBen Hutchings channel->type->get_name(channel, 547d8291187SBen Hutchings efx->msi_context[channel->channel].name, 548d8291187SBen Hutchings sizeof(efx->msi_context[0].name)); 549874aeea5SJeff Kirsher } 550874aeea5SJeff Kirsher 551874aeea5SJeff Kirsher static int efx_probe_channels(struct efx_nic *efx) 552874aeea5SJeff Kirsher { 553874aeea5SJeff Kirsher struct efx_channel *channel; 554874aeea5SJeff Kirsher int rc; 555874aeea5SJeff Kirsher 556874aeea5SJeff Kirsher /* Restart special buffer allocation */ 557874aeea5SJeff Kirsher efx->next_buffer_table = 0; 558874aeea5SJeff Kirsher 559c92aaff1SBen Hutchings /* Probe channels in reverse, so that any 'extra' channels 560c92aaff1SBen Hutchings * use the start of the buffer table. This allows the traffic 561c92aaff1SBen Hutchings * channels to be resized without moving them or wasting the 562c92aaff1SBen Hutchings * entries before them. 563c92aaff1SBen Hutchings */ 564c92aaff1SBen Hutchings efx_for_each_channel_rev(channel, efx) { 565874aeea5SJeff Kirsher rc = efx_probe_channel(channel); 566874aeea5SJeff Kirsher if (rc) { 567874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 568874aeea5SJeff Kirsher "failed to create channel %d\n", 569874aeea5SJeff Kirsher channel->channel); 570874aeea5SJeff Kirsher goto fail; 571874aeea5SJeff Kirsher } 572874aeea5SJeff Kirsher } 573874aeea5SJeff Kirsher efx_set_channel_names(efx); 574874aeea5SJeff Kirsher 575874aeea5SJeff Kirsher return 0; 576874aeea5SJeff Kirsher 577874aeea5SJeff Kirsher fail: 578874aeea5SJeff Kirsher efx_remove_channels(efx); 579874aeea5SJeff Kirsher return rc; 580874aeea5SJeff Kirsher } 581874aeea5SJeff Kirsher 582874aeea5SJeff Kirsher /* Channels are shutdown and reinitialised whilst the NIC is running 583874aeea5SJeff Kirsher * to propagate configuration changes (mtu, checksum offload), or 584874aeea5SJeff Kirsher * to clear hardware error conditions 585874aeea5SJeff Kirsher */ 5869f2cb71cSBen Hutchings static void efx_start_datapath(struct efx_nic *efx) 587874aeea5SJeff Kirsher { 58885740cdfSBen Hutchings bool old_rx_scatter = efx->rx_scatter; 589874aeea5SJeff Kirsher struct efx_tx_queue *tx_queue; 590874aeea5SJeff Kirsher struct efx_rx_queue *rx_queue; 591874aeea5SJeff Kirsher struct efx_channel *channel; 59285740cdfSBen Hutchings size_t rx_buf_len; 593874aeea5SJeff Kirsher 594874aeea5SJeff Kirsher /* Calculate the rx buffer allocation parameters required to 595874aeea5SJeff Kirsher * support the current MTU, including padding for header 596874aeea5SJeff Kirsher * alignment and overruns. 597874aeea5SJeff Kirsher */ 59843a3739dSJon Cooper efx->rx_dma_len = (efx->rx_prefix_size + 599874aeea5SJeff Kirsher EFX_MAX_FRAME_LEN(efx->net_dev->mtu) + 600874aeea5SJeff Kirsher efx->type->rx_buffer_padding); 60185740cdfSBen Hutchings rx_buf_len = (sizeof(struct efx_rx_page_state) + 6022ec03014SAndrew Rybchenko efx->rx_ip_align + efx->rx_dma_len); 60385740cdfSBen Hutchings if (rx_buf_len <= PAGE_SIZE) { 604e8c68c0aSJon Cooper efx->rx_scatter = efx->type->always_rx_scatter; 60585740cdfSBen Hutchings efx->rx_buffer_order = 0; 60685740cdfSBen Hutchings } else if (efx->type->can_rx_scatter) { 607950c54dfSBen Hutchings BUILD_BUG_ON(EFX_RX_USR_BUF_SIZE % L1_CACHE_BYTES); 60885740cdfSBen Hutchings BUILD_BUG_ON(sizeof(struct efx_rx_page_state) + 609950c54dfSBen Hutchings 2 * ALIGN(NET_IP_ALIGN + EFX_RX_USR_BUF_SIZE, 610950c54dfSBen Hutchings EFX_RX_BUF_ALIGNMENT) > 611950c54dfSBen Hutchings PAGE_SIZE); 61285740cdfSBen Hutchings efx->rx_scatter = true; 61385740cdfSBen Hutchings efx->rx_dma_len = EFX_RX_USR_BUF_SIZE; 61485740cdfSBen Hutchings efx->rx_buffer_order = 0; 61585740cdfSBen Hutchings } else { 61685740cdfSBen Hutchings efx->rx_scatter = false; 61785740cdfSBen Hutchings efx->rx_buffer_order = get_order(rx_buf_len); 61885740cdfSBen Hutchings } 61985740cdfSBen Hutchings 6201648a23fSDaniel Pieczko efx_rx_config_page_split(efx); 6211648a23fSDaniel Pieczko if (efx->rx_buffer_order) 6221648a23fSDaniel Pieczko netif_dbg(efx, drv, efx->net_dev, 6231648a23fSDaniel Pieczko "RX buf len=%u; page order=%u batch=%u\n", 6241648a23fSDaniel Pieczko efx->rx_dma_len, efx->rx_buffer_order, 6251648a23fSDaniel Pieczko efx->rx_pages_per_batch); 6261648a23fSDaniel Pieczko else 6271648a23fSDaniel Pieczko netif_dbg(efx, drv, efx->net_dev, 6281648a23fSDaniel Pieczko "RX buf len=%u step=%u bpp=%u; page batch=%u\n", 6291648a23fSDaniel Pieczko efx->rx_dma_len, efx->rx_page_buf_step, 6301648a23fSDaniel Pieczko efx->rx_bufs_per_page, efx->rx_pages_per_batch); 6312768935aSDaniel Pieczko 632e8c68c0aSJon Cooper /* RX filters may also have scatter-enabled flags */ 63385740cdfSBen Hutchings if (efx->rx_scatter != old_rx_scatter) 634add72477SBen Hutchings efx->type->filter_update_rx_scatter(efx); 635874aeea5SJeff Kirsher 63614bf718fSBen Hutchings /* We must keep at least one descriptor in a TX ring empty. 63714bf718fSBen Hutchings * We could avoid this when the queue size does not exactly 63814bf718fSBen Hutchings * match the hardware ring size, but it's not that important. 63914bf718fSBen Hutchings * Therefore we stop the queue when one more skb might fill 64014bf718fSBen Hutchings * the ring completely. We wake it when half way back to 64114bf718fSBen Hutchings * empty. 64214bf718fSBen Hutchings */ 64314bf718fSBen Hutchings efx->txq_stop_thresh = efx->txq_entries - efx_tx_max_skb_descs(efx); 64414bf718fSBen Hutchings efx->txq_wake_thresh = efx->txq_stop_thresh / 2; 64514bf718fSBen Hutchings 646874aeea5SJeff Kirsher /* Initialise the channels */ 647874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) { 6483881d8abSAlexandre Rames efx_for_each_channel_tx_queue(tx_queue, channel) { 649874aeea5SJeff Kirsher efx_init_tx_queue(tx_queue); 6503881d8abSAlexandre Rames atomic_inc(&efx->active_queues); 6513881d8abSAlexandre Rames } 652874aeea5SJeff Kirsher 6539f2cb71cSBen Hutchings efx_for_each_channel_rx_queue(rx_queue, channel) { 654874aeea5SJeff Kirsher efx_init_rx_queue(rx_queue); 6553881d8abSAlexandre Rames atomic_inc(&efx->active_queues); 656cce28794SJon Cooper efx_stop_eventq(channel); 657cce28794SJon Cooper efx_fast_push_rx_descriptors(rx_queue, false); 658cce28794SJon Cooper efx_start_eventq(channel); 6599f2cb71cSBen Hutchings } 660874aeea5SJeff Kirsher 66185740cdfSBen Hutchings WARN_ON(channel->rx_pkt_n_frags); 662874aeea5SJeff Kirsher } 6639f2cb71cSBen Hutchings 6642ea4dc28SAlexandre Rames efx_ptp_start_datapath(efx); 6652ea4dc28SAlexandre Rames 6669f2cb71cSBen Hutchings if (netif_device_present(efx->net_dev)) 6679f2cb71cSBen Hutchings netif_tx_wake_all_queues(efx->net_dev); 668874aeea5SJeff Kirsher } 669874aeea5SJeff Kirsher 6709f2cb71cSBen Hutchings static void efx_stop_datapath(struct efx_nic *efx) 671874aeea5SJeff Kirsher { 672874aeea5SJeff Kirsher struct efx_channel *channel; 673874aeea5SJeff Kirsher struct efx_tx_queue *tx_queue; 674874aeea5SJeff Kirsher struct efx_rx_queue *rx_queue; 675874aeea5SJeff Kirsher int rc; 676874aeea5SJeff Kirsher 677874aeea5SJeff Kirsher EFX_ASSERT_RESET_SERIALISED(efx); 678874aeea5SJeff Kirsher BUG_ON(efx->port_enabled); 679874aeea5SJeff Kirsher 6802ea4dc28SAlexandre Rames efx_ptp_stop_datapath(efx); 6812ea4dc28SAlexandre Rames 682d8aec745SBen Hutchings /* Stop RX refill */ 683d8aec745SBen Hutchings efx_for_each_channel(channel, efx) { 684d8aec745SBen Hutchings efx_for_each_channel_rx_queue(rx_queue, channel) 685d8aec745SBen Hutchings rx_queue->refill_enabled = false; 686d8aec745SBen Hutchings } 687d8aec745SBen Hutchings 688874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) { 6899f2cb71cSBen Hutchings /* RX packet processing is pipelined, so wait for the 6909f2cb71cSBen Hutchings * NAPI handler to complete. At least event queue 0 6919f2cb71cSBen Hutchings * might be kept active by non-data events, so don't 6929f2cb71cSBen Hutchings * use napi_synchronize() but actually disable NAPI 6939f2cb71cSBen Hutchings * temporarily. 6949f2cb71cSBen Hutchings */ 6959f2cb71cSBen Hutchings if (efx_channel_has_rx_queue(channel)) { 6969f2cb71cSBen Hutchings efx_stop_eventq(channel); 6979f2cb71cSBen Hutchings efx_start_eventq(channel); 6989f2cb71cSBen Hutchings } 699e42c3d85SBen Hutchings } 700874aeea5SJeff Kirsher 701e42c3d85SBen Hutchings rc = efx->type->fini_dmaq(efx); 702e42c3d85SBen Hutchings if (rc && EFX_WORKAROUND_7803(efx)) { 703e42c3d85SBen Hutchings /* Schedule a reset to recover from the flush failure. The 704e42c3d85SBen Hutchings * descriptor caches reference memory we're about to free, 705e42c3d85SBen Hutchings * but falcon_reconfigure_mac_wrapper() won't reconnect 706e42c3d85SBen Hutchings * the MACs because of the pending reset. 707e42c3d85SBen Hutchings */ 708e42c3d85SBen Hutchings netif_err(efx, drv, efx->net_dev, 709e42c3d85SBen Hutchings "Resetting to recover from flush failure\n"); 710e42c3d85SBen Hutchings efx_schedule_reset(efx, RESET_TYPE_ALL); 711e42c3d85SBen Hutchings } else if (rc) { 712e42c3d85SBen Hutchings netif_err(efx, drv, efx->net_dev, "failed to flush queues\n"); 713e42c3d85SBen Hutchings } else { 714e42c3d85SBen Hutchings netif_dbg(efx, drv, efx->net_dev, 715e42c3d85SBen Hutchings "successfully flushed all queues\n"); 716e42c3d85SBen Hutchings } 717e42c3d85SBen Hutchings 718e42c3d85SBen Hutchings efx_for_each_channel(channel, efx) { 719874aeea5SJeff Kirsher efx_for_each_channel_rx_queue(rx_queue, channel) 720874aeea5SJeff Kirsher efx_fini_rx_queue(rx_queue); 721874aeea5SJeff Kirsher efx_for_each_possible_channel_tx_queue(tx_queue, channel) 722874aeea5SJeff Kirsher efx_fini_tx_queue(tx_queue); 723874aeea5SJeff Kirsher } 724874aeea5SJeff Kirsher } 725874aeea5SJeff Kirsher 726874aeea5SJeff Kirsher static void efx_remove_channel(struct efx_channel *channel) 727874aeea5SJeff Kirsher { 728874aeea5SJeff Kirsher struct efx_tx_queue *tx_queue; 729874aeea5SJeff Kirsher struct efx_rx_queue *rx_queue; 730874aeea5SJeff Kirsher 731874aeea5SJeff Kirsher netif_dbg(channel->efx, drv, channel->efx->net_dev, 732874aeea5SJeff Kirsher "destroy chan %d\n", channel->channel); 733874aeea5SJeff Kirsher 734874aeea5SJeff Kirsher efx_for_each_channel_rx_queue(rx_queue, channel) 735874aeea5SJeff Kirsher efx_remove_rx_queue(rx_queue); 736874aeea5SJeff Kirsher efx_for_each_possible_channel_tx_queue(tx_queue, channel) 737874aeea5SJeff Kirsher efx_remove_tx_queue(tx_queue); 738874aeea5SJeff Kirsher efx_remove_eventq(channel); 739c31e5f9fSStuart Hodgson channel->type->post_remove(channel); 740874aeea5SJeff Kirsher } 741874aeea5SJeff Kirsher 742874aeea5SJeff Kirsher static void efx_remove_channels(struct efx_nic *efx) 743874aeea5SJeff Kirsher { 744874aeea5SJeff Kirsher struct efx_channel *channel; 745874aeea5SJeff Kirsher 746874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) 747874aeea5SJeff Kirsher efx_remove_channel(channel); 748874aeea5SJeff Kirsher } 749874aeea5SJeff Kirsher 750874aeea5SJeff Kirsher int 751874aeea5SJeff Kirsher efx_realloc_channels(struct efx_nic *efx, u32 rxq_entries, u32 txq_entries) 752874aeea5SJeff Kirsher { 753874aeea5SJeff Kirsher struct efx_channel *other_channel[EFX_MAX_CHANNELS], *channel; 754874aeea5SJeff Kirsher u32 old_rxq_entries, old_txq_entries; 7557f967c01SBen Hutchings unsigned i, next_buffer_table = 0; 756261e4d96SJon Cooper int rc, rc2; 7578b7325b4SBen Hutchings 7588b7325b4SBen Hutchings rc = efx_check_disabled(efx); 7598b7325b4SBen Hutchings if (rc) 7608b7325b4SBen Hutchings return rc; 7617f967c01SBen Hutchings 7627f967c01SBen Hutchings /* Not all channels should be reallocated. We must avoid 7637f967c01SBen Hutchings * reallocating their buffer table entries. 7647f967c01SBen Hutchings */ 7657f967c01SBen Hutchings efx_for_each_channel(channel, efx) { 7667f967c01SBen Hutchings struct efx_rx_queue *rx_queue; 7677f967c01SBen Hutchings struct efx_tx_queue *tx_queue; 7687f967c01SBen Hutchings 7697f967c01SBen Hutchings if (channel->type->copy) 7707f967c01SBen Hutchings continue; 7717f967c01SBen Hutchings next_buffer_table = max(next_buffer_table, 7727f967c01SBen Hutchings channel->eventq.index + 7737f967c01SBen Hutchings channel->eventq.entries); 7747f967c01SBen Hutchings efx_for_each_channel_rx_queue(rx_queue, channel) 7757f967c01SBen Hutchings next_buffer_table = max(next_buffer_table, 7767f967c01SBen Hutchings rx_queue->rxd.index + 7777f967c01SBen Hutchings rx_queue->rxd.entries); 7787f967c01SBen Hutchings efx_for_each_channel_tx_queue(tx_queue, channel) 7797f967c01SBen Hutchings next_buffer_table = max(next_buffer_table, 7807f967c01SBen Hutchings tx_queue->txd.index + 7817f967c01SBen Hutchings tx_queue->txd.entries); 7827f967c01SBen Hutchings } 783874aeea5SJeff Kirsher 78429c69a48SBen Hutchings efx_device_detach_sync(efx); 785874aeea5SJeff Kirsher efx_stop_all(efx); 786d8291187SBen Hutchings efx_soft_disable_interrupts(efx); 787874aeea5SJeff Kirsher 7887f967c01SBen Hutchings /* Clone channels (where possible) */ 789874aeea5SJeff Kirsher memset(other_channel, 0, sizeof(other_channel)); 790874aeea5SJeff Kirsher for (i = 0; i < efx->n_channels; i++) { 7917f967c01SBen Hutchings channel = efx->channel[i]; 7927f967c01SBen Hutchings if (channel->type->copy) 7937f967c01SBen Hutchings channel = channel->type->copy(channel); 794874aeea5SJeff Kirsher if (!channel) { 795874aeea5SJeff Kirsher rc = -ENOMEM; 796874aeea5SJeff Kirsher goto out; 797874aeea5SJeff Kirsher } 798874aeea5SJeff Kirsher other_channel[i] = channel; 799874aeea5SJeff Kirsher } 800874aeea5SJeff Kirsher 801874aeea5SJeff Kirsher /* Swap entry counts and channel pointers */ 802874aeea5SJeff Kirsher old_rxq_entries = efx->rxq_entries; 803874aeea5SJeff Kirsher old_txq_entries = efx->txq_entries; 804874aeea5SJeff Kirsher efx->rxq_entries = rxq_entries; 805874aeea5SJeff Kirsher efx->txq_entries = txq_entries; 806874aeea5SJeff Kirsher for (i = 0; i < efx->n_channels; i++) { 807874aeea5SJeff Kirsher channel = efx->channel[i]; 808874aeea5SJeff Kirsher efx->channel[i] = other_channel[i]; 809874aeea5SJeff Kirsher other_channel[i] = channel; 810874aeea5SJeff Kirsher } 811874aeea5SJeff Kirsher 8127f967c01SBen Hutchings /* Restart buffer table allocation */ 8137f967c01SBen Hutchings efx->next_buffer_table = next_buffer_table; 8147f967c01SBen Hutchings 8157f967c01SBen Hutchings for (i = 0; i < efx->n_channels; i++) { 8167f967c01SBen Hutchings channel = efx->channel[i]; 8177f967c01SBen Hutchings if (!channel->type->copy) 8187f967c01SBen Hutchings continue; 8197f967c01SBen Hutchings rc = efx_probe_channel(channel); 820874aeea5SJeff Kirsher if (rc) 821874aeea5SJeff Kirsher goto rollback; 8227f967c01SBen Hutchings efx_init_napi_channel(efx->channel[i]); 823874aeea5SJeff Kirsher } 824874aeea5SJeff Kirsher 8257f967c01SBen Hutchings out: 8267f967c01SBen Hutchings /* Destroy unused channel structures */ 8277f967c01SBen Hutchings for (i = 0; i < efx->n_channels; i++) { 8287f967c01SBen Hutchings channel = other_channel[i]; 8297f967c01SBen Hutchings if (channel && channel->type->copy) { 8307f967c01SBen Hutchings efx_fini_napi_channel(channel); 8317f967c01SBen Hutchings efx_remove_channel(channel); 8327f967c01SBen Hutchings kfree(channel); 8337f967c01SBen Hutchings } 8347f967c01SBen Hutchings } 8357f967c01SBen Hutchings 836261e4d96SJon Cooper rc2 = efx_soft_enable_interrupts(efx); 837261e4d96SJon Cooper if (rc2) { 838261e4d96SJon Cooper rc = rc ? rc : rc2; 839261e4d96SJon Cooper netif_err(efx, drv, efx->net_dev, 840261e4d96SJon Cooper "unable to restart interrupts on channel reallocation\n"); 841261e4d96SJon Cooper efx_schedule_reset(efx, RESET_TYPE_DISABLE); 842261e4d96SJon Cooper } else { 843874aeea5SJeff Kirsher efx_start_all(efx); 84429c69a48SBen Hutchings netif_device_attach(efx->net_dev); 845261e4d96SJon Cooper } 846874aeea5SJeff Kirsher return rc; 847874aeea5SJeff Kirsher 848874aeea5SJeff Kirsher rollback: 849874aeea5SJeff Kirsher /* Swap back */ 850874aeea5SJeff Kirsher efx->rxq_entries = old_rxq_entries; 851874aeea5SJeff Kirsher efx->txq_entries = old_txq_entries; 852874aeea5SJeff Kirsher for (i = 0; i < efx->n_channels; i++) { 853874aeea5SJeff Kirsher channel = efx->channel[i]; 854874aeea5SJeff Kirsher efx->channel[i] = other_channel[i]; 855874aeea5SJeff Kirsher other_channel[i] = channel; 856874aeea5SJeff Kirsher } 857874aeea5SJeff Kirsher goto out; 858874aeea5SJeff Kirsher } 859874aeea5SJeff Kirsher 860874aeea5SJeff Kirsher void efx_schedule_slow_fill(struct efx_rx_queue *rx_queue) 861874aeea5SJeff Kirsher { 862874aeea5SJeff Kirsher mod_timer(&rx_queue->slow_fill, jiffies + msecs_to_jiffies(100)); 863874aeea5SJeff Kirsher } 864874aeea5SJeff Kirsher 8657f967c01SBen Hutchings static const struct efx_channel_type efx_default_channel_type = { 8667f967c01SBen Hutchings .pre_probe = efx_channel_dummy_op_int, 867c31e5f9fSStuart Hodgson .post_remove = efx_channel_dummy_op_void, 8687f967c01SBen Hutchings .get_name = efx_get_channel_name, 8697f967c01SBen Hutchings .copy = efx_copy_channel, 8707f967c01SBen Hutchings .keep_eventq = false, 8717f967c01SBen Hutchings }; 8727f967c01SBen Hutchings 8737f967c01SBen Hutchings int efx_channel_dummy_op_int(struct efx_channel *channel) 8747f967c01SBen Hutchings { 8757f967c01SBen Hutchings return 0; 8767f967c01SBen Hutchings } 8777f967c01SBen Hutchings 878c31e5f9fSStuart Hodgson void efx_channel_dummy_op_void(struct efx_channel *channel) 879c31e5f9fSStuart Hodgson { 880c31e5f9fSStuart Hodgson } 881c31e5f9fSStuart Hodgson 882874aeea5SJeff Kirsher /************************************************************************** 883874aeea5SJeff Kirsher * 884874aeea5SJeff Kirsher * Port handling 885874aeea5SJeff Kirsher * 886874aeea5SJeff Kirsher **************************************************************************/ 887874aeea5SJeff Kirsher 888874aeea5SJeff Kirsher /* This ensures that the kernel is kept informed (via 889874aeea5SJeff Kirsher * netif_carrier_on/off) of the link status, and also maintains the 890874aeea5SJeff Kirsher * link status's stop on the port's TX queue. 891874aeea5SJeff Kirsher */ 892874aeea5SJeff Kirsher void efx_link_status_changed(struct efx_nic *efx) 893874aeea5SJeff Kirsher { 894874aeea5SJeff Kirsher struct efx_link_state *link_state = &efx->link_state; 895874aeea5SJeff Kirsher 896874aeea5SJeff Kirsher /* SFC Bug 5356: A net_dev notifier is registered, so we must ensure 897874aeea5SJeff Kirsher * that no events are triggered between unregister_netdev() and the 898874aeea5SJeff Kirsher * driver unloading. A more general condition is that NETDEV_CHANGE 899874aeea5SJeff Kirsher * can only be generated between NETDEV_UP and NETDEV_DOWN */ 900874aeea5SJeff Kirsher if (!netif_running(efx->net_dev)) 901874aeea5SJeff Kirsher return; 902874aeea5SJeff Kirsher 903874aeea5SJeff Kirsher if (link_state->up != netif_carrier_ok(efx->net_dev)) { 904874aeea5SJeff Kirsher efx->n_link_state_changes++; 905874aeea5SJeff Kirsher 906874aeea5SJeff Kirsher if (link_state->up) 907874aeea5SJeff Kirsher netif_carrier_on(efx->net_dev); 908874aeea5SJeff Kirsher else 909874aeea5SJeff Kirsher netif_carrier_off(efx->net_dev); 910874aeea5SJeff Kirsher } 911874aeea5SJeff Kirsher 912874aeea5SJeff Kirsher /* Status message for kernel log */ 9132aa9ef11SBen Hutchings if (link_state->up) 914874aeea5SJeff Kirsher netif_info(efx, link, efx->net_dev, 915964e6135SBen Hutchings "link up at %uMbps %s-duplex (MTU %d)\n", 916874aeea5SJeff Kirsher link_state->speed, link_state->fd ? "full" : "half", 917964e6135SBen Hutchings efx->net_dev->mtu); 9182aa9ef11SBen Hutchings else 919874aeea5SJeff Kirsher netif_info(efx, link, efx->net_dev, "link down\n"); 920874aeea5SJeff Kirsher } 921874aeea5SJeff Kirsher 922874aeea5SJeff Kirsher void efx_link_set_advertising(struct efx_nic *efx, u32 advertising) 923874aeea5SJeff Kirsher { 924874aeea5SJeff Kirsher efx->link_advertising = advertising; 925874aeea5SJeff Kirsher if (advertising) { 926874aeea5SJeff Kirsher if (advertising & ADVERTISED_Pause) 927874aeea5SJeff Kirsher efx->wanted_fc |= (EFX_FC_TX | EFX_FC_RX); 928874aeea5SJeff Kirsher else 929874aeea5SJeff Kirsher efx->wanted_fc &= ~(EFX_FC_TX | EFX_FC_RX); 930874aeea5SJeff Kirsher if (advertising & ADVERTISED_Asym_Pause) 931874aeea5SJeff Kirsher efx->wanted_fc ^= EFX_FC_TX; 932874aeea5SJeff Kirsher } 933874aeea5SJeff Kirsher } 934874aeea5SJeff Kirsher 935874aeea5SJeff Kirsher void efx_link_set_wanted_fc(struct efx_nic *efx, u8 wanted_fc) 936874aeea5SJeff Kirsher { 937874aeea5SJeff Kirsher efx->wanted_fc = wanted_fc; 938874aeea5SJeff Kirsher if (efx->link_advertising) { 939874aeea5SJeff Kirsher if (wanted_fc & EFX_FC_RX) 940874aeea5SJeff Kirsher efx->link_advertising |= (ADVERTISED_Pause | 941874aeea5SJeff Kirsher ADVERTISED_Asym_Pause); 942874aeea5SJeff Kirsher else 943874aeea5SJeff Kirsher efx->link_advertising &= ~(ADVERTISED_Pause | 944874aeea5SJeff Kirsher ADVERTISED_Asym_Pause); 945874aeea5SJeff Kirsher if (wanted_fc & EFX_FC_TX) 946874aeea5SJeff Kirsher efx->link_advertising ^= ADVERTISED_Asym_Pause; 947874aeea5SJeff Kirsher } 948874aeea5SJeff Kirsher } 949874aeea5SJeff Kirsher 950874aeea5SJeff Kirsher static void efx_fini_port(struct efx_nic *efx); 951874aeea5SJeff Kirsher 952874aeea5SJeff Kirsher /* Push loopback/power/transmit disable settings to the PHY, and reconfigure 953874aeea5SJeff Kirsher * the MAC appropriately. All other PHY configuration changes are pushed 954874aeea5SJeff Kirsher * through phy_op->set_settings(), and pushed asynchronously to the MAC 955874aeea5SJeff Kirsher * through efx_monitor(). 956874aeea5SJeff Kirsher * 957874aeea5SJeff Kirsher * Callers must hold the mac_lock 958874aeea5SJeff Kirsher */ 959874aeea5SJeff Kirsher int __efx_reconfigure_port(struct efx_nic *efx) 960874aeea5SJeff Kirsher { 961874aeea5SJeff Kirsher enum efx_phy_mode phy_mode; 962874aeea5SJeff Kirsher int rc; 963874aeea5SJeff Kirsher 964874aeea5SJeff Kirsher WARN_ON(!mutex_is_locked(&efx->mac_lock)); 965874aeea5SJeff Kirsher 966874aeea5SJeff Kirsher /* Disable PHY transmit in mac level loopbacks */ 967874aeea5SJeff Kirsher phy_mode = efx->phy_mode; 968874aeea5SJeff Kirsher if (LOOPBACK_INTERNAL(efx)) 969874aeea5SJeff Kirsher efx->phy_mode |= PHY_MODE_TX_DISABLED; 970874aeea5SJeff Kirsher else 971874aeea5SJeff Kirsher efx->phy_mode &= ~PHY_MODE_TX_DISABLED; 972874aeea5SJeff Kirsher 973874aeea5SJeff Kirsher rc = efx->type->reconfigure_port(efx); 974874aeea5SJeff Kirsher 975874aeea5SJeff Kirsher if (rc) 976874aeea5SJeff Kirsher efx->phy_mode = phy_mode; 977874aeea5SJeff Kirsher 978874aeea5SJeff Kirsher return rc; 979874aeea5SJeff Kirsher } 980874aeea5SJeff Kirsher 981874aeea5SJeff Kirsher /* Reinitialise the MAC to pick up new PHY settings, even if the port is 982874aeea5SJeff Kirsher * disabled. */ 983874aeea5SJeff Kirsher int efx_reconfigure_port(struct efx_nic *efx) 984874aeea5SJeff Kirsher { 985874aeea5SJeff Kirsher int rc; 986874aeea5SJeff Kirsher 987874aeea5SJeff Kirsher EFX_ASSERT_RESET_SERIALISED(efx); 988874aeea5SJeff Kirsher 989874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 990874aeea5SJeff Kirsher rc = __efx_reconfigure_port(efx); 991874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 992874aeea5SJeff Kirsher 993874aeea5SJeff Kirsher return rc; 994874aeea5SJeff Kirsher } 995874aeea5SJeff Kirsher 996874aeea5SJeff Kirsher /* Asynchronous work item for changing MAC promiscuity and multicast 997874aeea5SJeff Kirsher * hash. Avoid a drain/rx_ingress enable by reconfiguring the current 998874aeea5SJeff Kirsher * MAC directly. */ 999874aeea5SJeff Kirsher static void efx_mac_work(struct work_struct *data) 1000874aeea5SJeff Kirsher { 1001874aeea5SJeff Kirsher struct efx_nic *efx = container_of(data, struct efx_nic, mac_work); 1002874aeea5SJeff Kirsher 1003874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 100430b81cdaSBen Hutchings if (efx->port_enabled) 1005710b208dSBen Hutchings efx->type->reconfigure_mac(efx); 1006874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 1007874aeea5SJeff Kirsher } 1008874aeea5SJeff Kirsher 1009874aeea5SJeff Kirsher static int efx_probe_port(struct efx_nic *efx) 1010874aeea5SJeff Kirsher { 1011874aeea5SJeff Kirsher int rc; 1012874aeea5SJeff Kirsher 1013874aeea5SJeff Kirsher netif_dbg(efx, probe, efx->net_dev, "create port\n"); 1014874aeea5SJeff Kirsher 1015874aeea5SJeff Kirsher if (phy_flash_cfg) 1016874aeea5SJeff Kirsher efx->phy_mode = PHY_MODE_SPECIAL; 1017874aeea5SJeff Kirsher 1018874aeea5SJeff Kirsher /* Connect up MAC/PHY operations table */ 1019874aeea5SJeff Kirsher rc = efx->type->probe_port(efx); 1020874aeea5SJeff Kirsher if (rc) 1021874aeea5SJeff Kirsher return rc; 1022874aeea5SJeff Kirsher 1023e332bcb3SBen Hutchings /* Initialise MAC address to permanent address */ 1024cd84ff4dSEdward Cree ether_addr_copy(efx->net_dev->dev_addr, efx->net_dev->perm_addr); 1025874aeea5SJeff Kirsher 1026874aeea5SJeff Kirsher return 0; 1027874aeea5SJeff Kirsher } 1028874aeea5SJeff Kirsher 1029874aeea5SJeff Kirsher static int efx_init_port(struct efx_nic *efx) 1030874aeea5SJeff Kirsher { 1031874aeea5SJeff Kirsher int rc; 1032874aeea5SJeff Kirsher 1033874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "init port\n"); 1034874aeea5SJeff Kirsher 1035874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 1036874aeea5SJeff Kirsher 1037874aeea5SJeff Kirsher rc = efx->phy_op->init(efx); 1038874aeea5SJeff Kirsher if (rc) 1039874aeea5SJeff Kirsher goto fail1; 1040874aeea5SJeff Kirsher 1041874aeea5SJeff Kirsher efx->port_initialized = true; 1042874aeea5SJeff Kirsher 1043874aeea5SJeff Kirsher /* Reconfigure the MAC before creating dma queues (required for 1044874aeea5SJeff Kirsher * Falcon/A1 where RX_INGR_EN/TX_DRAIN_EN isn't supported) */ 1045710b208dSBen Hutchings efx->type->reconfigure_mac(efx); 1046874aeea5SJeff Kirsher 1047874aeea5SJeff Kirsher /* Ensure the PHY advertises the correct flow control settings */ 1048874aeea5SJeff Kirsher rc = efx->phy_op->reconfigure(efx); 1049874aeea5SJeff Kirsher if (rc) 1050874aeea5SJeff Kirsher goto fail2; 1051874aeea5SJeff Kirsher 1052874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 1053874aeea5SJeff Kirsher return 0; 1054874aeea5SJeff Kirsher 1055874aeea5SJeff Kirsher fail2: 1056874aeea5SJeff Kirsher efx->phy_op->fini(efx); 1057874aeea5SJeff Kirsher fail1: 1058874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 1059874aeea5SJeff Kirsher return rc; 1060874aeea5SJeff Kirsher } 1061874aeea5SJeff Kirsher 1062874aeea5SJeff Kirsher static void efx_start_port(struct efx_nic *efx) 1063874aeea5SJeff Kirsher { 1064874aeea5SJeff Kirsher netif_dbg(efx, ifup, efx->net_dev, "start port\n"); 1065874aeea5SJeff Kirsher BUG_ON(efx->port_enabled); 1066874aeea5SJeff Kirsher 1067874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 1068874aeea5SJeff Kirsher efx->port_enabled = true; 1069874aeea5SJeff Kirsher 1070d615c039SBen Hutchings /* Ensure MAC ingress/egress is enabled */ 1071710b208dSBen Hutchings efx->type->reconfigure_mac(efx); 1072874aeea5SJeff Kirsher 1073874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 1074874aeea5SJeff Kirsher } 1075874aeea5SJeff Kirsher 1076d615c039SBen Hutchings /* Cancel work for MAC reconfiguration, periodic hardware monitoring 1077d615c039SBen Hutchings * and the async self-test, wait for them to finish and prevent them 1078d615c039SBen Hutchings * being scheduled again. This doesn't cover online resets, which 1079d615c039SBen Hutchings * should only be cancelled when removing the device. 1080d615c039SBen Hutchings */ 1081874aeea5SJeff Kirsher static void efx_stop_port(struct efx_nic *efx) 1082874aeea5SJeff Kirsher { 1083874aeea5SJeff Kirsher netif_dbg(efx, ifdown, efx->net_dev, "stop port\n"); 1084874aeea5SJeff Kirsher 1085d615c039SBen Hutchings EFX_ASSERT_RESET_SERIALISED(efx); 1086d615c039SBen Hutchings 1087874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 1088874aeea5SJeff Kirsher efx->port_enabled = false; 1089874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 1090874aeea5SJeff Kirsher 1091874aeea5SJeff Kirsher /* Serialise against efx_set_multicast_list() */ 1092874aeea5SJeff Kirsher netif_addr_lock_bh(efx->net_dev); 1093874aeea5SJeff Kirsher netif_addr_unlock_bh(efx->net_dev); 1094d615c039SBen Hutchings 1095d615c039SBen Hutchings cancel_delayed_work_sync(&efx->monitor_work); 1096d615c039SBen Hutchings efx_selftest_async_cancel(efx); 1097d615c039SBen Hutchings cancel_work_sync(&efx->mac_work); 1098874aeea5SJeff Kirsher } 1099874aeea5SJeff Kirsher 1100874aeea5SJeff Kirsher static void efx_fini_port(struct efx_nic *efx) 1101874aeea5SJeff Kirsher { 1102874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "shut down port\n"); 1103874aeea5SJeff Kirsher 1104874aeea5SJeff Kirsher if (!efx->port_initialized) 1105874aeea5SJeff Kirsher return; 1106874aeea5SJeff Kirsher 1107874aeea5SJeff Kirsher efx->phy_op->fini(efx); 1108874aeea5SJeff Kirsher efx->port_initialized = false; 1109874aeea5SJeff Kirsher 1110874aeea5SJeff Kirsher efx->link_state.up = false; 1111874aeea5SJeff Kirsher efx_link_status_changed(efx); 1112874aeea5SJeff Kirsher } 1113874aeea5SJeff Kirsher 1114874aeea5SJeff Kirsher static void efx_remove_port(struct efx_nic *efx) 1115874aeea5SJeff Kirsher { 1116874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "destroying port\n"); 1117874aeea5SJeff Kirsher 1118874aeea5SJeff Kirsher efx->type->remove_port(efx); 1119874aeea5SJeff Kirsher } 1120874aeea5SJeff Kirsher 1121874aeea5SJeff Kirsher /************************************************************************** 1122874aeea5SJeff Kirsher * 1123874aeea5SJeff Kirsher * NIC handling 1124874aeea5SJeff Kirsher * 1125874aeea5SJeff Kirsher **************************************************************************/ 1126874aeea5SJeff Kirsher 11270bcf4a64SBen Hutchings static LIST_HEAD(efx_primary_list); 11280bcf4a64SBen Hutchings static LIST_HEAD(efx_unassociated_list); 11290bcf4a64SBen Hutchings 11300bcf4a64SBen Hutchings static bool efx_same_controller(struct efx_nic *left, struct efx_nic *right) 11310bcf4a64SBen Hutchings { 11320bcf4a64SBen Hutchings return left->type == right->type && 11330bcf4a64SBen Hutchings left->vpd_sn && right->vpd_sn && 11340bcf4a64SBen Hutchings !strcmp(left->vpd_sn, right->vpd_sn); 11350bcf4a64SBen Hutchings } 11360bcf4a64SBen Hutchings 11370bcf4a64SBen Hutchings static void efx_associate(struct efx_nic *efx) 11380bcf4a64SBen Hutchings { 11390bcf4a64SBen Hutchings struct efx_nic *other, *next; 11400bcf4a64SBen Hutchings 11410bcf4a64SBen Hutchings if (efx->primary == efx) { 11420bcf4a64SBen Hutchings /* Adding primary function; look for secondaries */ 11430bcf4a64SBen Hutchings 11440bcf4a64SBen Hutchings netif_dbg(efx, probe, efx->net_dev, "adding to primary list\n"); 11450bcf4a64SBen Hutchings list_add_tail(&efx->node, &efx_primary_list); 11460bcf4a64SBen Hutchings 11470bcf4a64SBen Hutchings list_for_each_entry_safe(other, next, &efx_unassociated_list, 11480bcf4a64SBen Hutchings node) { 11490bcf4a64SBen Hutchings if (efx_same_controller(efx, other)) { 11500bcf4a64SBen Hutchings list_del(&other->node); 11510bcf4a64SBen Hutchings netif_dbg(other, probe, other->net_dev, 11520bcf4a64SBen Hutchings "moving to secondary list of %s %s\n", 11530bcf4a64SBen Hutchings pci_name(efx->pci_dev), 11540bcf4a64SBen Hutchings efx->net_dev->name); 11550bcf4a64SBen Hutchings list_add_tail(&other->node, 11560bcf4a64SBen Hutchings &efx->secondary_list); 11570bcf4a64SBen Hutchings other->primary = efx; 11580bcf4a64SBen Hutchings } 11590bcf4a64SBen Hutchings } 11600bcf4a64SBen Hutchings } else { 11610bcf4a64SBen Hutchings /* Adding secondary function; look for primary */ 11620bcf4a64SBen Hutchings 11630bcf4a64SBen Hutchings list_for_each_entry(other, &efx_primary_list, node) { 11640bcf4a64SBen Hutchings if (efx_same_controller(efx, other)) { 11650bcf4a64SBen Hutchings netif_dbg(efx, probe, efx->net_dev, 11660bcf4a64SBen Hutchings "adding to secondary list of %s %s\n", 11670bcf4a64SBen Hutchings pci_name(other->pci_dev), 11680bcf4a64SBen Hutchings other->net_dev->name); 11690bcf4a64SBen Hutchings list_add_tail(&efx->node, 11700bcf4a64SBen Hutchings &other->secondary_list); 11710bcf4a64SBen Hutchings efx->primary = other; 11720bcf4a64SBen Hutchings return; 11730bcf4a64SBen Hutchings } 11740bcf4a64SBen Hutchings } 11750bcf4a64SBen Hutchings 11760bcf4a64SBen Hutchings netif_dbg(efx, probe, efx->net_dev, 11770bcf4a64SBen Hutchings "adding to unassociated list\n"); 11780bcf4a64SBen Hutchings list_add_tail(&efx->node, &efx_unassociated_list); 11790bcf4a64SBen Hutchings } 11800bcf4a64SBen Hutchings } 11810bcf4a64SBen Hutchings 11820bcf4a64SBen Hutchings static void efx_dissociate(struct efx_nic *efx) 11830bcf4a64SBen Hutchings { 11840bcf4a64SBen Hutchings struct efx_nic *other, *next; 11850bcf4a64SBen Hutchings 11860bcf4a64SBen Hutchings list_del(&efx->node); 11870bcf4a64SBen Hutchings efx->primary = NULL; 11880bcf4a64SBen Hutchings 11890bcf4a64SBen Hutchings list_for_each_entry_safe(other, next, &efx->secondary_list, node) { 11900bcf4a64SBen Hutchings list_del(&other->node); 11910bcf4a64SBen Hutchings netif_dbg(other, probe, other->net_dev, 11920bcf4a64SBen Hutchings "moving to unassociated list\n"); 11930bcf4a64SBen Hutchings list_add_tail(&other->node, &efx_unassociated_list); 11940bcf4a64SBen Hutchings other->primary = NULL; 11950bcf4a64SBen Hutchings } 11960bcf4a64SBen Hutchings } 11970bcf4a64SBen Hutchings 1198874aeea5SJeff Kirsher /* This configures the PCI device to enable I/O and DMA. */ 1199874aeea5SJeff Kirsher static int efx_init_io(struct efx_nic *efx) 1200874aeea5SJeff Kirsher { 1201874aeea5SJeff Kirsher struct pci_dev *pci_dev = efx->pci_dev; 1202874aeea5SJeff Kirsher dma_addr_t dma_mask = efx->type->max_dma_mask; 1203b105798fSBen Hutchings unsigned int mem_map_size = efx->type->mem_map_size(efx); 1204874aeea5SJeff Kirsher int rc; 1205874aeea5SJeff Kirsher 1206874aeea5SJeff Kirsher netif_dbg(efx, probe, efx->net_dev, "initialising I/O\n"); 1207874aeea5SJeff Kirsher 1208874aeea5SJeff Kirsher rc = pci_enable_device(pci_dev); 1209874aeea5SJeff Kirsher if (rc) { 1210874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 1211874aeea5SJeff Kirsher "failed to enable PCI device\n"); 1212874aeea5SJeff Kirsher goto fail1; 1213874aeea5SJeff Kirsher } 1214874aeea5SJeff Kirsher 1215874aeea5SJeff Kirsher pci_set_master(pci_dev); 1216874aeea5SJeff Kirsher 1217874aeea5SJeff Kirsher /* Set the PCI DMA mask. Try all possibilities from our 1218874aeea5SJeff Kirsher * genuine mask down to 32 bits, because some architectures 1219874aeea5SJeff Kirsher * (e.g. x86_64 with iommu_sac_force set) will allow 40 bit 1220874aeea5SJeff Kirsher * masks event though they reject 46 bit masks. 1221874aeea5SJeff Kirsher */ 1222874aeea5SJeff Kirsher while (dma_mask > 0x7fffffffUL) { 12230e33d870SBen Hutchings if (dma_supported(&pci_dev->dev, dma_mask)) { 12249663dedaSRussell King rc = dma_set_mask_and_coherent(&pci_dev->dev, dma_mask); 1225e9e01846SBen Hutchings if (rc == 0) 1226874aeea5SJeff Kirsher break; 1227e9e01846SBen Hutchings } 1228874aeea5SJeff Kirsher dma_mask >>= 1; 1229874aeea5SJeff Kirsher } 1230874aeea5SJeff Kirsher if (rc) { 1231874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 1232874aeea5SJeff Kirsher "could not find a suitable DMA mask\n"); 1233874aeea5SJeff Kirsher goto fail2; 1234874aeea5SJeff Kirsher } 1235874aeea5SJeff Kirsher netif_dbg(efx, probe, efx->net_dev, 1236874aeea5SJeff Kirsher "using DMA mask %llx\n", (unsigned long long) dma_mask); 1237874aeea5SJeff Kirsher 1238874aeea5SJeff Kirsher efx->membase_phys = pci_resource_start(efx->pci_dev, EFX_MEM_BAR); 1239874aeea5SJeff Kirsher rc = pci_request_region(pci_dev, EFX_MEM_BAR, "sfc"); 1240874aeea5SJeff Kirsher if (rc) { 1241874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 1242874aeea5SJeff Kirsher "request for memory BAR failed\n"); 1243874aeea5SJeff Kirsher rc = -EIO; 1244874aeea5SJeff Kirsher goto fail3; 1245874aeea5SJeff Kirsher } 1246b105798fSBen Hutchings efx->membase = ioremap_nocache(efx->membase_phys, mem_map_size); 1247874aeea5SJeff Kirsher if (!efx->membase) { 1248874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 1249874aeea5SJeff Kirsher "could not map memory BAR at %llx+%x\n", 1250b105798fSBen Hutchings (unsigned long long)efx->membase_phys, mem_map_size); 1251874aeea5SJeff Kirsher rc = -ENOMEM; 1252874aeea5SJeff Kirsher goto fail4; 1253874aeea5SJeff Kirsher } 1254874aeea5SJeff Kirsher netif_dbg(efx, probe, efx->net_dev, 1255874aeea5SJeff Kirsher "memory BAR at %llx+%x (virtual %p)\n", 1256b105798fSBen Hutchings (unsigned long long)efx->membase_phys, mem_map_size, 1257b105798fSBen Hutchings efx->membase); 1258874aeea5SJeff Kirsher 1259874aeea5SJeff Kirsher return 0; 1260874aeea5SJeff Kirsher 1261874aeea5SJeff Kirsher fail4: 1262874aeea5SJeff Kirsher pci_release_region(efx->pci_dev, EFX_MEM_BAR); 1263874aeea5SJeff Kirsher fail3: 1264874aeea5SJeff Kirsher efx->membase_phys = 0; 1265874aeea5SJeff Kirsher fail2: 1266874aeea5SJeff Kirsher pci_disable_device(efx->pci_dev); 1267874aeea5SJeff Kirsher fail1: 1268874aeea5SJeff Kirsher return rc; 1269874aeea5SJeff Kirsher } 1270874aeea5SJeff Kirsher 1271874aeea5SJeff Kirsher static void efx_fini_io(struct efx_nic *efx) 1272874aeea5SJeff Kirsher { 1273874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "shutting down I/O\n"); 1274874aeea5SJeff Kirsher 1275874aeea5SJeff Kirsher if (efx->membase) { 1276874aeea5SJeff Kirsher iounmap(efx->membase); 1277874aeea5SJeff Kirsher efx->membase = NULL; 1278874aeea5SJeff Kirsher } 1279874aeea5SJeff Kirsher 1280874aeea5SJeff Kirsher if (efx->membase_phys) { 1281874aeea5SJeff Kirsher pci_release_region(efx->pci_dev, EFX_MEM_BAR); 1282874aeea5SJeff Kirsher efx->membase_phys = 0; 1283874aeea5SJeff Kirsher } 1284874aeea5SJeff Kirsher 1285874aeea5SJeff Kirsher pci_disable_device(efx->pci_dev); 1286874aeea5SJeff Kirsher } 1287874aeea5SJeff Kirsher 1288a9a52506SBen Hutchings static unsigned int efx_wanted_parallelism(struct efx_nic *efx) 1289874aeea5SJeff Kirsher { 1290cdb08f8fSBen Hutchings cpumask_var_t thread_mask; 1291a16e5b24SBen Hutchings unsigned int count; 1292874aeea5SJeff Kirsher int cpu; 1293874aeea5SJeff Kirsher 1294cd2d5b52SBen Hutchings if (rss_cpus) { 1295cd2d5b52SBen Hutchings count = rss_cpus; 1296cd2d5b52SBen Hutchings } else { 1297cdb08f8fSBen Hutchings if (unlikely(!zalloc_cpumask_var(&thread_mask, GFP_KERNEL))) { 1298a9a52506SBen Hutchings netif_warn(efx, probe, efx->net_dev, 1299a9a52506SBen Hutchings "RSS disabled due to allocation failure\n"); 1300874aeea5SJeff Kirsher return 1; 1301874aeea5SJeff Kirsher } 1302874aeea5SJeff Kirsher 1303874aeea5SJeff Kirsher count = 0; 1304874aeea5SJeff Kirsher for_each_online_cpu(cpu) { 1305cdb08f8fSBen Hutchings if (!cpumask_test_cpu(cpu, thread_mask)) { 1306874aeea5SJeff Kirsher ++count; 1307cdb08f8fSBen Hutchings cpumask_or(thread_mask, thread_mask, 1308cdb08f8fSBen Hutchings topology_thread_cpumask(cpu)); 1309874aeea5SJeff Kirsher } 1310874aeea5SJeff Kirsher } 1311874aeea5SJeff Kirsher 1312cdb08f8fSBen Hutchings free_cpumask_var(thread_mask); 1313cd2d5b52SBen Hutchings } 1314cd2d5b52SBen Hutchings 1315cd2d5b52SBen Hutchings /* If RSS is requested for the PF *and* VFs then we can't write RSS 1316cd2d5b52SBen Hutchings * table entries that are inaccessible to VFs 1317cd2d5b52SBen Hutchings */ 13187fa8d547SShradha Shah #ifdef CONFIG_SFC_SRIOV 13197fa8d547SShradha Shah if (efx->type->sriov_wanted) { 1320d98a4ffeSShradha Shah if (efx->type->sriov_wanted(efx) && efx_vf_size(efx) > 1 && 1321cd2d5b52SBen Hutchings count > efx_vf_size(efx)) { 1322cd2d5b52SBen Hutchings netif_warn(efx, probe, efx->net_dev, 1323cd2d5b52SBen Hutchings "Reducing number of RSS channels from %u to %u for " 1324cd2d5b52SBen Hutchings "VF support. Increase vf-msix-limit to use more " 1325cd2d5b52SBen Hutchings "channels on the PF.\n", 1326cd2d5b52SBen Hutchings count, efx_vf_size(efx)); 1327cd2d5b52SBen Hutchings count = efx_vf_size(efx); 1328cd2d5b52SBen Hutchings } 13297fa8d547SShradha Shah } 13307fa8d547SShradha Shah #endif 1331cd2d5b52SBen Hutchings 1332874aeea5SJeff Kirsher return count; 1333874aeea5SJeff Kirsher } 1334874aeea5SJeff Kirsher 1335874aeea5SJeff Kirsher /* Probe the number and type of interrupts we are able to obtain, and 1336874aeea5SJeff Kirsher * the resulting numbers of channels and RX queues. 1337874aeea5SJeff Kirsher */ 1338874aeea5SJeff Kirsher static int efx_probe_interrupts(struct efx_nic *efx) 1339874aeea5SJeff Kirsher { 13407f967c01SBen Hutchings unsigned int extra_channels = 0; 13417f967c01SBen Hutchings unsigned int i, j; 1342a16e5b24SBen Hutchings int rc; 1343874aeea5SJeff Kirsher 13447f967c01SBen Hutchings for (i = 0; i < EFX_MAX_EXTRA_CHANNELS; i++) 13457f967c01SBen Hutchings if (efx->extra_channel_type[i]) 13467f967c01SBen Hutchings ++extra_channels; 13477f967c01SBen Hutchings 1348874aeea5SJeff Kirsher if (efx->interrupt_mode == EFX_INT_MODE_MSIX) { 1349874aeea5SJeff Kirsher struct msix_entry xentries[EFX_MAX_CHANNELS]; 1350a16e5b24SBen Hutchings unsigned int n_channels; 1351874aeea5SJeff Kirsher 1352a9a52506SBen Hutchings n_channels = efx_wanted_parallelism(efx); 1353874aeea5SJeff Kirsher if (separate_tx_channels) 1354874aeea5SJeff Kirsher n_channels *= 2; 13557f967c01SBen Hutchings n_channels += extra_channels; 1356b105798fSBen Hutchings n_channels = min(n_channels, efx->max_channels); 1357874aeea5SJeff Kirsher 1358874aeea5SJeff Kirsher for (i = 0; i < n_channels; i++) 1359874aeea5SJeff Kirsher xentries[i].entry = i; 1360184603d8SAlexander Gordeev rc = pci_enable_msix_range(efx->pci_dev, 1361184603d8SAlexander Gordeev xentries, 1, n_channels); 1362184603d8SAlexander Gordeev if (rc < 0) { 1363184603d8SAlexander Gordeev /* Fall back to single channel MSI */ 1364184603d8SAlexander Gordeev efx->interrupt_mode = EFX_INT_MODE_MSI; 1365184603d8SAlexander Gordeev netif_err(efx, drv, efx->net_dev, 1366184603d8SAlexander Gordeev "could not enable MSI-X\n"); 1367184603d8SAlexander Gordeev } else if (rc < n_channels) { 1368874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, 1369874aeea5SJeff Kirsher "WARNING: Insufficient MSI-X vectors" 1370a16e5b24SBen Hutchings " available (%d < %u).\n", rc, n_channels); 1371874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, 1372874aeea5SJeff Kirsher "WARNING: Performance may be reduced.\n"); 1373874aeea5SJeff Kirsher n_channels = rc; 1374874aeea5SJeff Kirsher } 1375874aeea5SJeff Kirsher 1376184603d8SAlexander Gordeev if (rc > 0) { 1377874aeea5SJeff Kirsher efx->n_channels = n_channels; 13787f967c01SBen Hutchings if (n_channels > extra_channels) 13797f967c01SBen Hutchings n_channels -= extra_channels; 1380874aeea5SJeff Kirsher if (separate_tx_channels) { 13817f967c01SBen Hutchings efx->n_tx_channels = max(n_channels / 2, 1U); 13827f967c01SBen Hutchings efx->n_rx_channels = max(n_channels - 13837f967c01SBen Hutchings efx->n_tx_channels, 13847f967c01SBen Hutchings 1U); 1385874aeea5SJeff Kirsher } else { 13867f967c01SBen Hutchings efx->n_tx_channels = n_channels; 13877f967c01SBen Hutchings efx->n_rx_channels = n_channels; 1388874aeea5SJeff Kirsher } 13897f967c01SBen Hutchings for (i = 0; i < efx->n_channels; i++) 1390874aeea5SJeff Kirsher efx_get_channel(efx, i)->irq = 1391874aeea5SJeff Kirsher xentries[i].vector; 1392874aeea5SJeff Kirsher } 1393874aeea5SJeff Kirsher } 1394874aeea5SJeff Kirsher 1395874aeea5SJeff Kirsher /* Try single interrupt MSI */ 1396874aeea5SJeff Kirsher if (efx->interrupt_mode == EFX_INT_MODE_MSI) { 1397874aeea5SJeff Kirsher efx->n_channels = 1; 1398874aeea5SJeff Kirsher efx->n_rx_channels = 1; 1399874aeea5SJeff Kirsher efx->n_tx_channels = 1; 1400874aeea5SJeff Kirsher rc = pci_enable_msi(efx->pci_dev); 1401874aeea5SJeff Kirsher if (rc == 0) { 1402874aeea5SJeff Kirsher efx_get_channel(efx, 0)->irq = efx->pci_dev->irq; 1403874aeea5SJeff Kirsher } else { 1404874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, 1405874aeea5SJeff Kirsher "could not enable MSI\n"); 1406874aeea5SJeff Kirsher efx->interrupt_mode = EFX_INT_MODE_LEGACY; 1407874aeea5SJeff Kirsher } 1408874aeea5SJeff Kirsher } 1409874aeea5SJeff Kirsher 1410874aeea5SJeff Kirsher /* Assume legacy interrupts */ 1411874aeea5SJeff Kirsher if (efx->interrupt_mode == EFX_INT_MODE_LEGACY) { 1412874aeea5SJeff Kirsher efx->n_channels = 1 + (separate_tx_channels ? 1 : 0); 1413874aeea5SJeff Kirsher efx->n_rx_channels = 1; 1414874aeea5SJeff Kirsher efx->n_tx_channels = 1; 1415874aeea5SJeff Kirsher efx->legacy_irq = efx->pci_dev->irq; 1416874aeea5SJeff Kirsher } 1417874aeea5SJeff Kirsher 14187f967c01SBen Hutchings /* Assign extra channels if possible */ 14197f967c01SBen Hutchings j = efx->n_channels; 14207f967c01SBen Hutchings for (i = 0; i < EFX_MAX_EXTRA_CHANNELS; i++) { 14217f967c01SBen Hutchings if (!efx->extra_channel_type[i]) 14227f967c01SBen Hutchings continue; 14237f967c01SBen Hutchings if (efx->interrupt_mode != EFX_INT_MODE_MSIX || 14247f967c01SBen Hutchings efx->n_channels <= extra_channels) { 14257f967c01SBen Hutchings efx->extra_channel_type[i]->handle_no_channel(efx); 14267f967c01SBen Hutchings } else { 14277f967c01SBen Hutchings --j; 14287f967c01SBen Hutchings efx_get_channel(efx, j)->type = 14297f967c01SBen Hutchings efx->extra_channel_type[i]; 14307f967c01SBen Hutchings } 14317f967c01SBen Hutchings } 14327f967c01SBen Hutchings 1433cd2d5b52SBen Hutchings /* RSS might be usable on VFs even if it is disabled on the PF */ 14347fa8d547SShradha Shah #ifdef CONFIG_SFC_SRIOV 14357fa8d547SShradha Shah if (efx->type->sriov_wanted) { 1436327c685eSShradha Shah efx->rss_spread = ((efx->n_rx_channels > 1 || 1437d98a4ffeSShradha Shah !efx->type->sriov_wanted(efx)) ? 1438cd2d5b52SBen Hutchings efx->n_rx_channels : efx_vf_size(efx)); 14397fa8d547SShradha Shah return 0; 14407fa8d547SShradha Shah } 14417fa8d547SShradha Shah #endif 14427fa8d547SShradha Shah efx->rss_spread = efx->n_rx_channels; 1443874aeea5SJeff Kirsher return 0; 1444874aeea5SJeff Kirsher } 1445874aeea5SJeff Kirsher 1446261e4d96SJon Cooper static int efx_soft_enable_interrupts(struct efx_nic *efx) 1447d8291187SBen Hutchings { 1448261e4d96SJon Cooper struct efx_channel *channel, *end_channel; 1449261e4d96SJon Cooper int rc; 1450d8291187SBen Hutchings 1451d8291187SBen Hutchings BUG_ON(efx->state == STATE_DISABLED); 1452d8291187SBen Hutchings 1453d8291187SBen Hutchings efx->irq_soft_enabled = true; 1454d8291187SBen Hutchings smp_wmb(); 1455d8291187SBen Hutchings 1456d8291187SBen Hutchings efx_for_each_channel(channel, efx) { 1457261e4d96SJon Cooper if (!channel->type->keep_eventq) { 1458261e4d96SJon Cooper rc = efx_init_eventq(channel); 1459261e4d96SJon Cooper if (rc) 1460261e4d96SJon Cooper goto fail; 1461261e4d96SJon Cooper } 1462d8291187SBen Hutchings efx_start_eventq(channel); 1463d8291187SBen Hutchings } 1464d8291187SBen Hutchings 1465d8291187SBen Hutchings efx_mcdi_mode_event(efx); 1466261e4d96SJon Cooper 1467261e4d96SJon Cooper return 0; 1468261e4d96SJon Cooper fail: 1469261e4d96SJon Cooper end_channel = channel; 1470261e4d96SJon Cooper efx_for_each_channel(channel, efx) { 1471261e4d96SJon Cooper if (channel == end_channel) 1472261e4d96SJon Cooper break; 1473261e4d96SJon Cooper efx_stop_eventq(channel); 1474261e4d96SJon Cooper if (!channel->type->keep_eventq) 1475261e4d96SJon Cooper efx_fini_eventq(channel); 1476261e4d96SJon Cooper } 1477261e4d96SJon Cooper 1478261e4d96SJon Cooper return rc; 1479d8291187SBen Hutchings } 1480d8291187SBen Hutchings 1481d8291187SBen Hutchings static void efx_soft_disable_interrupts(struct efx_nic *efx) 1482d8291187SBen Hutchings { 1483d8291187SBen Hutchings struct efx_channel *channel; 1484d8291187SBen Hutchings 1485d8291187SBen Hutchings if (efx->state == STATE_DISABLED) 1486d8291187SBen Hutchings return; 1487d8291187SBen Hutchings 1488d8291187SBen Hutchings efx_mcdi_mode_poll(efx); 1489d8291187SBen Hutchings 1490d8291187SBen Hutchings efx->irq_soft_enabled = false; 1491d8291187SBen Hutchings smp_wmb(); 1492d8291187SBen Hutchings 1493d8291187SBen Hutchings if (efx->legacy_irq) 1494d8291187SBen Hutchings synchronize_irq(efx->legacy_irq); 1495d8291187SBen Hutchings 1496d8291187SBen Hutchings efx_for_each_channel(channel, efx) { 1497d8291187SBen Hutchings if (channel->irq) 1498d8291187SBen Hutchings synchronize_irq(channel->irq); 1499d8291187SBen Hutchings 1500d8291187SBen Hutchings efx_stop_eventq(channel); 1501d8291187SBen Hutchings if (!channel->type->keep_eventq) 1502d8291187SBen Hutchings efx_fini_eventq(channel); 1503d8291187SBen Hutchings } 1504cade715fSBen Hutchings 1505cade715fSBen Hutchings /* Flush the asynchronous MCDI request queue */ 1506cade715fSBen Hutchings efx_mcdi_flush_async(efx); 1507d8291187SBen Hutchings } 1508d8291187SBen Hutchings 1509261e4d96SJon Cooper static int efx_enable_interrupts(struct efx_nic *efx) 15109f2cb71cSBen Hutchings { 1511261e4d96SJon Cooper struct efx_channel *channel, *end_channel; 1512261e4d96SJon Cooper int rc; 15139f2cb71cSBen Hutchings 15148b7325b4SBen Hutchings BUG_ON(efx->state == STATE_DISABLED); 15158b7325b4SBen Hutchings 1516b28405b0SAlexandre Rames if (efx->eeh_disabled_legacy_irq) { 1517b28405b0SAlexandre Rames enable_irq(efx->legacy_irq); 1518b28405b0SAlexandre Rames efx->eeh_disabled_legacy_irq = false; 1519b28405b0SAlexandre Rames } 1520d8291187SBen Hutchings 152186094f7fSBen Hutchings efx->type->irq_enable_master(efx); 15229f2cb71cSBen Hutchings 15239f2cb71cSBen Hutchings efx_for_each_channel(channel, efx) { 1524261e4d96SJon Cooper if (channel->type->keep_eventq) { 1525261e4d96SJon Cooper rc = efx_init_eventq(channel); 1526261e4d96SJon Cooper if (rc) 1527261e4d96SJon Cooper goto fail; 1528261e4d96SJon Cooper } 15299f2cb71cSBen Hutchings } 15309f2cb71cSBen Hutchings 1531261e4d96SJon Cooper rc = efx_soft_enable_interrupts(efx); 1532261e4d96SJon Cooper if (rc) 1533261e4d96SJon Cooper goto fail; 1534261e4d96SJon Cooper 1535261e4d96SJon Cooper return 0; 1536261e4d96SJon Cooper 1537261e4d96SJon Cooper fail: 1538261e4d96SJon Cooper end_channel = channel; 1539261e4d96SJon Cooper efx_for_each_channel(channel, efx) { 1540261e4d96SJon Cooper if (channel == end_channel) 1541261e4d96SJon Cooper break; 1542261e4d96SJon Cooper if (channel->type->keep_eventq) 1543261e4d96SJon Cooper efx_fini_eventq(channel); 1544261e4d96SJon Cooper } 1545261e4d96SJon Cooper 1546261e4d96SJon Cooper efx->type->irq_disable_non_ev(efx); 1547261e4d96SJon Cooper 1548261e4d96SJon Cooper return rc; 15499f2cb71cSBen Hutchings } 15509f2cb71cSBen Hutchings 1551d8291187SBen Hutchings static void efx_disable_interrupts(struct efx_nic *efx) 15529f2cb71cSBen Hutchings { 15539f2cb71cSBen Hutchings struct efx_channel *channel; 15549f2cb71cSBen Hutchings 1555d8291187SBen Hutchings efx_soft_disable_interrupts(efx); 15569f2cb71cSBen Hutchings 15579f2cb71cSBen Hutchings efx_for_each_channel(channel, efx) { 1558d8291187SBen Hutchings if (channel->type->keep_eventq) 15599f2cb71cSBen Hutchings efx_fini_eventq(channel); 15609f2cb71cSBen Hutchings } 1561d8291187SBen Hutchings 156286094f7fSBen Hutchings efx->type->irq_disable_non_ev(efx); 15639f2cb71cSBen Hutchings } 15649f2cb71cSBen Hutchings 1565874aeea5SJeff Kirsher static void efx_remove_interrupts(struct efx_nic *efx) 1566874aeea5SJeff Kirsher { 1567874aeea5SJeff Kirsher struct efx_channel *channel; 1568874aeea5SJeff Kirsher 1569874aeea5SJeff Kirsher /* Remove MSI/MSI-X interrupts */ 1570874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) 1571874aeea5SJeff Kirsher channel->irq = 0; 1572874aeea5SJeff Kirsher pci_disable_msi(efx->pci_dev); 1573874aeea5SJeff Kirsher pci_disable_msix(efx->pci_dev); 1574874aeea5SJeff Kirsher 1575874aeea5SJeff Kirsher /* Remove legacy interrupt */ 1576874aeea5SJeff Kirsher efx->legacy_irq = 0; 1577874aeea5SJeff Kirsher } 1578874aeea5SJeff Kirsher 1579874aeea5SJeff Kirsher static void efx_set_channels(struct efx_nic *efx) 1580874aeea5SJeff Kirsher { 1581874aeea5SJeff Kirsher struct efx_channel *channel; 1582874aeea5SJeff Kirsher struct efx_tx_queue *tx_queue; 1583874aeea5SJeff Kirsher 1584874aeea5SJeff Kirsher efx->tx_channel_offset = 1585874aeea5SJeff Kirsher separate_tx_channels ? efx->n_channels - efx->n_tx_channels : 0; 1586874aeea5SJeff Kirsher 158779d68b37SStuart Hodgson /* We need to mark which channels really have RX and TX 158879d68b37SStuart Hodgson * queues, and adjust the TX queue numbers if we have separate 1589874aeea5SJeff Kirsher * RX-only and TX-only channels. 1590874aeea5SJeff Kirsher */ 1591874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) { 159279d68b37SStuart Hodgson if (channel->channel < efx->n_rx_channels) 159379d68b37SStuart Hodgson channel->rx_queue.core_index = channel->channel; 159479d68b37SStuart Hodgson else 159579d68b37SStuart Hodgson channel->rx_queue.core_index = -1; 159679d68b37SStuart Hodgson 1597874aeea5SJeff Kirsher efx_for_each_channel_tx_queue(tx_queue, channel) 1598874aeea5SJeff Kirsher tx_queue->queue -= (efx->tx_channel_offset * 1599874aeea5SJeff Kirsher EFX_TXQ_TYPES); 1600874aeea5SJeff Kirsher } 1601874aeea5SJeff Kirsher } 1602874aeea5SJeff Kirsher 1603874aeea5SJeff Kirsher static int efx_probe_nic(struct efx_nic *efx) 1604874aeea5SJeff Kirsher { 1605874aeea5SJeff Kirsher size_t i; 1606874aeea5SJeff Kirsher int rc; 1607874aeea5SJeff Kirsher 1608874aeea5SJeff Kirsher netif_dbg(efx, probe, efx->net_dev, "creating NIC\n"); 1609874aeea5SJeff Kirsher 1610874aeea5SJeff Kirsher /* Carry out hardware-type specific initialisation */ 1611874aeea5SJeff Kirsher rc = efx->type->probe(efx); 1612874aeea5SJeff Kirsher if (rc) 1613874aeea5SJeff Kirsher return rc; 1614874aeea5SJeff Kirsher 1615874aeea5SJeff Kirsher /* Determine the number of channels and queues by trying to hook 1616874aeea5SJeff Kirsher * in MSI-X interrupts. */ 1617874aeea5SJeff Kirsher rc = efx_probe_interrupts(efx); 1618874aeea5SJeff Kirsher if (rc) 1619c15eed22SBen Hutchings goto fail1; 1620874aeea5SJeff Kirsher 162152ad762bSDaniel Pieczko efx_set_channels(efx); 162252ad762bSDaniel Pieczko 1623c15eed22SBen Hutchings rc = efx->type->dimension_resources(efx); 1624c15eed22SBen Hutchings if (rc) 1625c15eed22SBen Hutchings goto fail2; 162628e47c49SBen Hutchings 1627874aeea5SJeff Kirsher if (efx->n_channels > 1) 16287a20db37SEric Dumazet netdev_rss_key_fill(&efx->rx_hash_key, sizeof(efx->rx_hash_key)); 1629874aeea5SJeff Kirsher for (i = 0; i < ARRAY_SIZE(efx->rx_indir_table); i++) 1630278bc429SBen Hutchings efx->rx_indir_table[i] = 1631cd2d5b52SBen Hutchings ethtool_rxfh_indir_default(i, efx->rss_spread); 1632874aeea5SJeff Kirsher 1633874aeea5SJeff Kirsher netif_set_real_num_tx_queues(efx->net_dev, efx->n_tx_channels); 1634874aeea5SJeff Kirsher netif_set_real_num_rx_queues(efx->net_dev, efx->n_rx_channels); 1635874aeea5SJeff Kirsher 1636874aeea5SJeff Kirsher /* Initialise the interrupt moderation settings */ 16379e393b30SBen Hutchings efx_init_irq_moderation(efx, tx_irq_mod_usec, rx_irq_mod_usec, true, 16389e393b30SBen Hutchings true); 1639874aeea5SJeff Kirsher 1640874aeea5SJeff Kirsher return 0; 1641874aeea5SJeff Kirsher 1642c15eed22SBen Hutchings fail2: 1643c15eed22SBen Hutchings efx_remove_interrupts(efx); 1644c15eed22SBen Hutchings fail1: 1645874aeea5SJeff Kirsher efx->type->remove(efx); 1646874aeea5SJeff Kirsher return rc; 1647874aeea5SJeff Kirsher } 1648874aeea5SJeff Kirsher 1649874aeea5SJeff Kirsher static void efx_remove_nic(struct efx_nic *efx) 1650874aeea5SJeff Kirsher { 1651874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "destroying NIC\n"); 1652874aeea5SJeff Kirsher 1653874aeea5SJeff Kirsher efx_remove_interrupts(efx); 1654874aeea5SJeff Kirsher efx->type->remove(efx); 1655874aeea5SJeff Kirsher } 1656874aeea5SJeff Kirsher 1657add72477SBen Hutchings static int efx_probe_filters(struct efx_nic *efx) 1658add72477SBen Hutchings { 1659add72477SBen Hutchings int rc; 1660add72477SBen Hutchings 1661add72477SBen Hutchings spin_lock_init(&efx->filter_lock); 1662add72477SBen Hutchings 1663add72477SBen Hutchings rc = efx->type->filter_table_probe(efx); 1664add72477SBen Hutchings if (rc) 1665add72477SBen Hutchings return rc; 1666add72477SBen Hutchings 1667add72477SBen Hutchings #ifdef CONFIG_RFS_ACCEL 1668add72477SBen Hutchings if (efx->type->offload_features & NETIF_F_NTUPLE) { 1669add72477SBen Hutchings efx->rps_flow_id = kcalloc(efx->type->max_rx_ip_filters, 1670add72477SBen Hutchings sizeof(*efx->rps_flow_id), 1671add72477SBen Hutchings GFP_KERNEL); 1672add72477SBen Hutchings if (!efx->rps_flow_id) { 1673add72477SBen Hutchings efx->type->filter_table_remove(efx); 1674add72477SBen Hutchings return -ENOMEM; 1675add72477SBen Hutchings } 1676add72477SBen Hutchings } 1677add72477SBen Hutchings #endif 1678add72477SBen Hutchings 1679add72477SBen Hutchings return 0; 1680add72477SBen Hutchings } 1681add72477SBen Hutchings 1682add72477SBen Hutchings static void efx_remove_filters(struct efx_nic *efx) 1683add72477SBen Hutchings { 1684add72477SBen Hutchings #ifdef CONFIG_RFS_ACCEL 1685add72477SBen Hutchings kfree(efx->rps_flow_id); 1686add72477SBen Hutchings #endif 1687add72477SBen Hutchings efx->type->filter_table_remove(efx); 1688add72477SBen Hutchings } 1689add72477SBen Hutchings 1690add72477SBen Hutchings static void efx_restore_filters(struct efx_nic *efx) 1691add72477SBen Hutchings { 1692add72477SBen Hutchings efx->type->filter_table_restore(efx); 1693add72477SBen Hutchings } 1694add72477SBen Hutchings 1695874aeea5SJeff Kirsher /************************************************************************** 1696874aeea5SJeff Kirsher * 1697874aeea5SJeff Kirsher * NIC startup/shutdown 1698874aeea5SJeff Kirsher * 1699874aeea5SJeff Kirsher *************************************************************************/ 1700874aeea5SJeff Kirsher 1701874aeea5SJeff Kirsher static int efx_probe_all(struct efx_nic *efx) 1702874aeea5SJeff Kirsher { 1703874aeea5SJeff Kirsher int rc; 1704874aeea5SJeff Kirsher 1705874aeea5SJeff Kirsher rc = efx_probe_nic(efx); 1706874aeea5SJeff Kirsher if (rc) { 1707874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, "failed to create NIC\n"); 1708874aeea5SJeff Kirsher goto fail1; 1709874aeea5SJeff Kirsher } 1710874aeea5SJeff Kirsher 1711874aeea5SJeff Kirsher rc = efx_probe_port(efx); 1712874aeea5SJeff Kirsher if (rc) { 1713874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, "failed to create port\n"); 1714874aeea5SJeff Kirsher goto fail2; 1715874aeea5SJeff Kirsher } 1716874aeea5SJeff Kirsher 17177e6d06f0SBen Hutchings BUILD_BUG_ON(EFX_DEFAULT_DMAQ_SIZE < EFX_RXQ_MIN_ENT); 17187e6d06f0SBen Hutchings if (WARN_ON(EFX_DEFAULT_DMAQ_SIZE < EFX_TXQ_MIN_ENT(efx))) { 17197e6d06f0SBen Hutchings rc = -EINVAL; 17207e6d06f0SBen Hutchings goto fail3; 17217e6d06f0SBen Hutchings } 1722874aeea5SJeff Kirsher efx->rxq_entries = efx->txq_entries = EFX_DEFAULT_DMAQ_SIZE; 1723874aeea5SJeff Kirsher 1724874aeea5SJeff Kirsher rc = efx_probe_filters(efx); 1725874aeea5SJeff Kirsher if (rc) { 1726874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 1727874aeea5SJeff Kirsher "failed to create filter tables\n"); 17287f967c01SBen Hutchings goto fail3; 1729874aeea5SJeff Kirsher } 1730874aeea5SJeff Kirsher 17317f967c01SBen Hutchings rc = efx_probe_channels(efx); 17327f967c01SBen Hutchings if (rc) 17337f967c01SBen Hutchings goto fail4; 17347f967c01SBen Hutchings 1735874aeea5SJeff Kirsher return 0; 1736874aeea5SJeff Kirsher 1737874aeea5SJeff Kirsher fail4: 17387f967c01SBen Hutchings efx_remove_filters(efx); 1739874aeea5SJeff Kirsher fail3: 1740874aeea5SJeff Kirsher efx_remove_port(efx); 1741874aeea5SJeff Kirsher fail2: 1742874aeea5SJeff Kirsher efx_remove_nic(efx); 1743874aeea5SJeff Kirsher fail1: 1744874aeea5SJeff Kirsher return rc; 1745874aeea5SJeff Kirsher } 1746874aeea5SJeff Kirsher 17478b7325b4SBen Hutchings /* If the interface is supposed to be running but is not, start 17488b7325b4SBen Hutchings * the hardware and software data path, regular activity for the port 17498b7325b4SBen Hutchings * (MAC statistics, link polling, etc.) and schedule the port to be 17508b7325b4SBen Hutchings * reconfigured. Interrupts must already be enabled. This function 17518b7325b4SBen Hutchings * is safe to call multiple times, so long as the NIC is not disabled. 17528b7325b4SBen Hutchings * Requires the RTNL lock. 17539f2cb71cSBen Hutchings */ 1754874aeea5SJeff Kirsher static void efx_start_all(struct efx_nic *efx) 1755874aeea5SJeff Kirsher { 1756874aeea5SJeff Kirsher EFX_ASSERT_RESET_SERIALISED(efx); 17578b7325b4SBen Hutchings BUG_ON(efx->state == STATE_DISABLED); 1758874aeea5SJeff Kirsher 1759874aeea5SJeff Kirsher /* Check that it is appropriate to restart the interface. All 1760874aeea5SJeff Kirsher * of these flags are safe to read under just the rtnl lock */ 1761e283546cSEdward Cree if (efx->port_enabled || !netif_running(efx->net_dev) || 1762e283546cSEdward Cree efx->reset_pending) 1763874aeea5SJeff Kirsher return; 1764874aeea5SJeff Kirsher 1765874aeea5SJeff Kirsher efx_start_port(efx); 17669f2cb71cSBen Hutchings efx_start_datapath(efx); 1767874aeea5SJeff Kirsher 1768626950dbSAlexandre Rames /* Start the hardware monitor if there is one */ 1769626950dbSAlexandre Rames if (efx->type->monitor != NULL) 1770874aeea5SJeff Kirsher queue_delayed_work(efx->workqueue, &efx->monitor_work, 1771874aeea5SJeff Kirsher efx_monitor_interval); 1772626950dbSAlexandre Rames 1773626950dbSAlexandre Rames /* If link state detection is normally event-driven, we have 1774626950dbSAlexandre Rames * to poll now because we could have missed a change 1775626950dbSAlexandre Rames */ 1776626950dbSAlexandre Rames if (efx_nic_rev(efx) >= EFX_REV_SIENA_A0) { 1777874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 1778874aeea5SJeff Kirsher if (efx->phy_op->poll(efx)) 1779874aeea5SJeff Kirsher efx_link_status_changed(efx); 1780874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 1781874aeea5SJeff Kirsher } 1782874aeea5SJeff Kirsher 1783874aeea5SJeff Kirsher efx->type->start_stats(efx); 1784f8f3b5aeSJon Cooper efx->type->pull_stats(efx); 1785f8f3b5aeSJon Cooper spin_lock_bh(&efx->stats_lock); 1786f8f3b5aeSJon Cooper efx->type->update_stats(efx, NULL, NULL); 1787f8f3b5aeSJon Cooper spin_unlock_bh(&efx->stats_lock); 1788874aeea5SJeff Kirsher } 1789874aeea5SJeff Kirsher 17908b7325b4SBen Hutchings /* Quiesce the hardware and software data path, and regular activity 17918b7325b4SBen Hutchings * for the port without bringing the link down. Safe to call multiple 17928b7325b4SBen Hutchings * times with the NIC in almost any state, but interrupts should be 17938b7325b4SBen Hutchings * enabled. Requires the RTNL lock. 17948b7325b4SBen Hutchings */ 1795874aeea5SJeff Kirsher static void efx_stop_all(struct efx_nic *efx) 1796874aeea5SJeff Kirsher { 1797874aeea5SJeff Kirsher EFX_ASSERT_RESET_SERIALISED(efx); 1798874aeea5SJeff Kirsher 1799874aeea5SJeff Kirsher /* port_enabled can be read safely under the rtnl lock */ 1800874aeea5SJeff Kirsher if (!efx->port_enabled) 1801874aeea5SJeff Kirsher return; 1802874aeea5SJeff Kirsher 1803f8f3b5aeSJon Cooper /* update stats before we go down so we can accurately count 1804f8f3b5aeSJon Cooper * rx_nodesc_drops 1805f8f3b5aeSJon Cooper */ 1806f8f3b5aeSJon Cooper efx->type->pull_stats(efx); 1807f8f3b5aeSJon Cooper spin_lock_bh(&efx->stats_lock); 1808f8f3b5aeSJon Cooper efx->type->update_stats(efx, NULL, NULL); 1809f8f3b5aeSJon Cooper spin_unlock_bh(&efx->stats_lock); 1810874aeea5SJeff Kirsher efx->type->stop_stats(efx); 1811874aeea5SJeff Kirsher efx_stop_port(efx); 1812874aeea5SJeff Kirsher 181329c69a48SBen Hutchings /* Stop the kernel transmit interface. This is only valid if 181429c69a48SBen Hutchings * the device is stopped or detached; otherwise the watchdog 181529c69a48SBen Hutchings * may fire immediately. 181629c69a48SBen Hutchings */ 181729c69a48SBen Hutchings WARN_ON(netif_running(efx->net_dev) && 181829c69a48SBen Hutchings netif_device_present(efx->net_dev)); 18199f2cb71cSBen Hutchings netif_tx_disable(efx->net_dev); 18209f2cb71cSBen Hutchings 18219f2cb71cSBen Hutchings efx_stop_datapath(efx); 1822874aeea5SJeff Kirsher } 1823874aeea5SJeff Kirsher 1824874aeea5SJeff Kirsher static void efx_remove_all(struct efx_nic *efx) 1825874aeea5SJeff Kirsher { 1826874aeea5SJeff Kirsher efx_remove_channels(efx); 18277f967c01SBen Hutchings efx_remove_filters(efx); 1828874aeea5SJeff Kirsher efx_remove_port(efx); 1829874aeea5SJeff Kirsher efx_remove_nic(efx); 1830874aeea5SJeff Kirsher } 1831874aeea5SJeff Kirsher 1832874aeea5SJeff Kirsher /************************************************************************** 1833874aeea5SJeff Kirsher * 1834874aeea5SJeff Kirsher * Interrupt moderation 1835874aeea5SJeff Kirsher * 1836874aeea5SJeff Kirsher **************************************************************************/ 1837874aeea5SJeff Kirsher 1838cc180b69SBen Hutchings static unsigned int irq_mod_ticks(unsigned int usecs, unsigned int quantum_ns) 1839874aeea5SJeff Kirsher { 1840b548f976SBen Hutchings if (usecs == 0) 1841b548f976SBen Hutchings return 0; 1842cc180b69SBen Hutchings if (usecs * 1000 < quantum_ns) 1843874aeea5SJeff Kirsher return 1; /* never round down to 0 */ 1844cc180b69SBen Hutchings return usecs * 1000 / quantum_ns; 1845874aeea5SJeff Kirsher } 1846874aeea5SJeff Kirsher 1847874aeea5SJeff Kirsher /* Set interrupt moderation parameters */ 18489e393b30SBen Hutchings int efx_init_irq_moderation(struct efx_nic *efx, unsigned int tx_usecs, 18499e393b30SBen Hutchings unsigned int rx_usecs, bool rx_adaptive, 18509e393b30SBen Hutchings bool rx_may_override_tx) 1851874aeea5SJeff Kirsher { 1852874aeea5SJeff Kirsher struct efx_channel *channel; 1853cc180b69SBen Hutchings unsigned int irq_mod_max = DIV_ROUND_UP(efx->type->timer_period_max * 1854cc180b69SBen Hutchings efx->timer_quantum_ns, 1855cc180b69SBen Hutchings 1000); 1856cc180b69SBen Hutchings unsigned int tx_ticks; 1857cc180b69SBen Hutchings unsigned int rx_ticks; 1858874aeea5SJeff Kirsher 1859874aeea5SJeff Kirsher EFX_ASSERT_RESET_SERIALISED(efx); 1860874aeea5SJeff Kirsher 1861cc180b69SBen Hutchings if (tx_usecs > irq_mod_max || rx_usecs > irq_mod_max) 18629e393b30SBen Hutchings return -EINVAL; 18639e393b30SBen Hutchings 1864cc180b69SBen Hutchings tx_ticks = irq_mod_ticks(tx_usecs, efx->timer_quantum_ns); 1865cc180b69SBen Hutchings rx_ticks = irq_mod_ticks(rx_usecs, efx->timer_quantum_ns); 1866cc180b69SBen Hutchings 18679e393b30SBen Hutchings if (tx_ticks != rx_ticks && efx->tx_channel_offset == 0 && 18689e393b30SBen Hutchings !rx_may_override_tx) { 18699e393b30SBen Hutchings netif_err(efx, drv, efx->net_dev, "Channels are shared. " 18709e393b30SBen Hutchings "RX and TX IRQ moderation must be equal\n"); 18719e393b30SBen Hutchings return -EINVAL; 18729e393b30SBen Hutchings } 18739e393b30SBen Hutchings 1874874aeea5SJeff Kirsher efx->irq_rx_adaptive = rx_adaptive; 1875874aeea5SJeff Kirsher efx->irq_rx_moderation = rx_ticks; 1876874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) { 1877874aeea5SJeff Kirsher if (efx_channel_has_rx_queue(channel)) 1878874aeea5SJeff Kirsher channel->irq_moderation = rx_ticks; 1879874aeea5SJeff Kirsher else if (efx_channel_has_tx_queues(channel)) 1880874aeea5SJeff Kirsher channel->irq_moderation = tx_ticks; 1881874aeea5SJeff Kirsher } 18829e393b30SBen Hutchings 18839e393b30SBen Hutchings return 0; 1884874aeea5SJeff Kirsher } 1885874aeea5SJeff Kirsher 1886a0c4faf5SBen Hutchings void efx_get_irq_moderation(struct efx_nic *efx, unsigned int *tx_usecs, 1887a0c4faf5SBen Hutchings unsigned int *rx_usecs, bool *rx_adaptive) 1888a0c4faf5SBen Hutchings { 1889cc180b69SBen Hutchings /* We must round up when converting ticks to microseconds 1890cc180b69SBen Hutchings * because we round down when converting the other way. 1891cc180b69SBen Hutchings */ 1892cc180b69SBen Hutchings 1893a0c4faf5SBen Hutchings *rx_adaptive = efx->irq_rx_adaptive; 1894cc180b69SBen Hutchings *rx_usecs = DIV_ROUND_UP(efx->irq_rx_moderation * 1895cc180b69SBen Hutchings efx->timer_quantum_ns, 1896cc180b69SBen Hutchings 1000); 1897a0c4faf5SBen Hutchings 1898a0c4faf5SBen Hutchings /* If channels are shared between RX and TX, so is IRQ 1899a0c4faf5SBen Hutchings * moderation. Otherwise, IRQ moderation is the same for all 1900a0c4faf5SBen Hutchings * TX channels and is not adaptive. 1901a0c4faf5SBen Hutchings */ 1902a0c4faf5SBen Hutchings if (efx->tx_channel_offset == 0) 1903a0c4faf5SBen Hutchings *tx_usecs = *rx_usecs; 1904a0c4faf5SBen Hutchings else 1905cc180b69SBen Hutchings *tx_usecs = DIV_ROUND_UP( 1906a0c4faf5SBen Hutchings efx->channel[efx->tx_channel_offset]->irq_moderation * 1907cc180b69SBen Hutchings efx->timer_quantum_ns, 1908cc180b69SBen Hutchings 1000); 1909a0c4faf5SBen Hutchings } 1910a0c4faf5SBen Hutchings 1911874aeea5SJeff Kirsher /************************************************************************** 1912874aeea5SJeff Kirsher * 1913874aeea5SJeff Kirsher * Hardware monitor 1914874aeea5SJeff Kirsher * 1915874aeea5SJeff Kirsher **************************************************************************/ 1916874aeea5SJeff Kirsher 1917874aeea5SJeff Kirsher /* Run periodically off the general workqueue */ 1918874aeea5SJeff Kirsher static void efx_monitor(struct work_struct *data) 1919874aeea5SJeff Kirsher { 1920874aeea5SJeff Kirsher struct efx_nic *efx = container_of(data, struct efx_nic, 1921874aeea5SJeff Kirsher monitor_work.work); 1922874aeea5SJeff Kirsher 1923874aeea5SJeff Kirsher netif_vdbg(efx, timer, efx->net_dev, 1924874aeea5SJeff Kirsher "hardware monitor executing on CPU %d\n", 1925874aeea5SJeff Kirsher raw_smp_processor_id()); 1926874aeea5SJeff Kirsher BUG_ON(efx->type->monitor == NULL); 1927874aeea5SJeff Kirsher 1928874aeea5SJeff Kirsher /* If the mac_lock is already held then it is likely a port 1929874aeea5SJeff Kirsher * reconfiguration is already in place, which will likely do 1930874aeea5SJeff Kirsher * most of the work of monitor() anyway. */ 1931874aeea5SJeff Kirsher if (mutex_trylock(&efx->mac_lock)) { 1932874aeea5SJeff Kirsher if (efx->port_enabled) 1933874aeea5SJeff Kirsher efx->type->monitor(efx); 1934874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 1935874aeea5SJeff Kirsher } 1936874aeea5SJeff Kirsher 1937874aeea5SJeff Kirsher queue_delayed_work(efx->workqueue, &efx->monitor_work, 1938874aeea5SJeff Kirsher efx_monitor_interval); 1939874aeea5SJeff Kirsher } 1940874aeea5SJeff Kirsher 1941874aeea5SJeff Kirsher /************************************************************************** 1942874aeea5SJeff Kirsher * 1943874aeea5SJeff Kirsher * ioctls 1944874aeea5SJeff Kirsher * 1945874aeea5SJeff Kirsher *************************************************************************/ 1946874aeea5SJeff Kirsher 1947874aeea5SJeff Kirsher /* Net device ioctl 1948874aeea5SJeff Kirsher * Context: process, rtnl_lock() held. 1949874aeea5SJeff Kirsher */ 1950874aeea5SJeff Kirsher static int efx_ioctl(struct net_device *net_dev, struct ifreq *ifr, int cmd) 1951874aeea5SJeff Kirsher { 1952874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 1953874aeea5SJeff Kirsher struct mii_ioctl_data *data = if_mii(ifr); 1954874aeea5SJeff Kirsher 19557c236c43SStuart Hodgson if (cmd == SIOCSHWTSTAMP) 1956433dc9b3SBen Hutchings return efx_ptp_set_ts_config(efx, ifr); 1957433dc9b3SBen Hutchings if (cmd == SIOCGHWTSTAMP) 1958433dc9b3SBen Hutchings return efx_ptp_get_ts_config(efx, ifr); 19597c236c43SStuart Hodgson 1960874aeea5SJeff Kirsher /* Convert phy_id from older PRTAD/DEVAD format */ 1961874aeea5SJeff Kirsher if ((cmd == SIOCGMIIREG || cmd == SIOCSMIIREG) && 1962874aeea5SJeff Kirsher (data->phy_id & 0xfc00) == 0x0400) 1963874aeea5SJeff Kirsher data->phy_id ^= MDIO_PHY_ID_C45 | 0x0400; 1964874aeea5SJeff Kirsher 1965874aeea5SJeff Kirsher return mdio_mii_ioctl(&efx->mdio, data, cmd); 1966874aeea5SJeff Kirsher } 1967874aeea5SJeff Kirsher 1968874aeea5SJeff Kirsher /************************************************************************** 1969874aeea5SJeff Kirsher * 1970874aeea5SJeff Kirsher * NAPI interface 1971874aeea5SJeff Kirsher * 1972874aeea5SJeff Kirsher **************************************************************************/ 1973874aeea5SJeff Kirsher 19747f967c01SBen Hutchings static void efx_init_napi_channel(struct efx_channel *channel) 1975874aeea5SJeff Kirsher { 19767f967c01SBen Hutchings struct efx_nic *efx = channel->efx; 1977874aeea5SJeff Kirsher 1978874aeea5SJeff Kirsher channel->napi_dev = efx->net_dev; 1979874aeea5SJeff Kirsher netif_napi_add(channel->napi_dev, &channel->napi_str, 1980874aeea5SJeff Kirsher efx_poll, napi_weight); 198136763266SAlexandre Rames napi_hash_add(&channel->napi_str); 198236763266SAlexandre Rames efx_channel_init_lock(channel); 1983874aeea5SJeff Kirsher } 19847f967c01SBen Hutchings 19857f967c01SBen Hutchings static void efx_init_napi(struct efx_nic *efx) 19867f967c01SBen Hutchings { 19877f967c01SBen Hutchings struct efx_channel *channel; 19887f967c01SBen Hutchings 19897f967c01SBen Hutchings efx_for_each_channel(channel, efx) 19907f967c01SBen Hutchings efx_init_napi_channel(channel); 1991874aeea5SJeff Kirsher } 1992874aeea5SJeff Kirsher 1993874aeea5SJeff Kirsher static void efx_fini_napi_channel(struct efx_channel *channel) 1994874aeea5SJeff Kirsher { 199536763266SAlexandre Rames if (channel->napi_dev) { 1996874aeea5SJeff Kirsher netif_napi_del(&channel->napi_str); 199736763266SAlexandre Rames napi_hash_del(&channel->napi_str); 199836763266SAlexandre Rames } 1999874aeea5SJeff Kirsher channel->napi_dev = NULL; 2000874aeea5SJeff Kirsher } 2001874aeea5SJeff Kirsher 2002874aeea5SJeff Kirsher static void efx_fini_napi(struct efx_nic *efx) 2003874aeea5SJeff Kirsher { 2004874aeea5SJeff Kirsher struct efx_channel *channel; 2005874aeea5SJeff Kirsher 2006874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) 2007874aeea5SJeff Kirsher efx_fini_napi_channel(channel); 2008874aeea5SJeff Kirsher } 2009874aeea5SJeff Kirsher 2010874aeea5SJeff Kirsher /************************************************************************** 2011874aeea5SJeff Kirsher * 2012874aeea5SJeff Kirsher * Kernel netpoll interface 2013874aeea5SJeff Kirsher * 2014874aeea5SJeff Kirsher *************************************************************************/ 2015874aeea5SJeff Kirsher 2016874aeea5SJeff Kirsher #ifdef CONFIG_NET_POLL_CONTROLLER 2017874aeea5SJeff Kirsher 2018874aeea5SJeff Kirsher /* Although in the common case interrupts will be disabled, this is not 2019874aeea5SJeff Kirsher * guaranteed. However, all our work happens inside the NAPI callback, 2020874aeea5SJeff Kirsher * so no locking is required. 2021874aeea5SJeff Kirsher */ 2022874aeea5SJeff Kirsher static void efx_netpoll(struct net_device *net_dev) 2023874aeea5SJeff Kirsher { 2024874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 2025874aeea5SJeff Kirsher struct efx_channel *channel; 2026874aeea5SJeff Kirsher 2027874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) 2028874aeea5SJeff Kirsher efx_schedule_channel(channel); 2029874aeea5SJeff Kirsher } 2030874aeea5SJeff Kirsher 2031874aeea5SJeff Kirsher #endif 2032874aeea5SJeff Kirsher 203336763266SAlexandre Rames #ifdef CONFIG_NET_RX_BUSY_POLL 203436763266SAlexandre Rames static int efx_busy_poll(struct napi_struct *napi) 203536763266SAlexandre Rames { 203636763266SAlexandre Rames struct efx_channel *channel = 203736763266SAlexandre Rames container_of(napi, struct efx_channel, napi_str); 203836763266SAlexandre Rames struct efx_nic *efx = channel->efx; 203936763266SAlexandre Rames int budget = 4; 204036763266SAlexandre Rames int old_rx_packets, rx_packets; 204136763266SAlexandre Rames 204236763266SAlexandre Rames if (!netif_running(efx->net_dev)) 204336763266SAlexandre Rames return LL_FLUSH_FAILED; 204436763266SAlexandre Rames 204536763266SAlexandre Rames if (!efx_channel_lock_poll(channel)) 204636763266SAlexandre Rames return LL_FLUSH_BUSY; 204736763266SAlexandre Rames 204836763266SAlexandre Rames old_rx_packets = channel->rx_queue.rx_packets; 204936763266SAlexandre Rames efx_process_channel(channel, budget); 205036763266SAlexandre Rames 205136763266SAlexandre Rames rx_packets = channel->rx_queue.rx_packets - old_rx_packets; 205236763266SAlexandre Rames 205336763266SAlexandre Rames /* There is no race condition with NAPI here. 205436763266SAlexandre Rames * NAPI will automatically be rescheduled if it yielded during busy 205536763266SAlexandre Rames * polling, because it was not able to take the lock and thus returned 205636763266SAlexandre Rames * the full budget. 205736763266SAlexandre Rames */ 205836763266SAlexandre Rames efx_channel_unlock_poll(channel); 205936763266SAlexandre Rames 206036763266SAlexandre Rames return rx_packets; 206136763266SAlexandre Rames } 206236763266SAlexandre Rames #endif 206336763266SAlexandre Rames 2064874aeea5SJeff Kirsher /************************************************************************** 2065874aeea5SJeff Kirsher * 2066874aeea5SJeff Kirsher * Kernel net device interface 2067874aeea5SJeff Kirsher * 2068874aeea5SJeff Kirsher *************************************************************************/ 2069874aeea5SJeff Kirsher 2070874aeea5SJeff Kirsher /* Context: process, rtnl_lock() held. */ 2071874aeea5SJeff Kirsher static int efx_net_open(struct net_device *net_dev) 2072874aeea5SJeff Kirsher { 2073874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 20748b7325b4SBen Hutchings int rc; 20758b7325b4SBen Hutchings 2076874aeea5SJeff Kirsher netif_dbg(efx, ifup, efx->net_dev, "opening device on CPU %d\n", 2077874aeea5SJeff Kirsher raw_smp_processor_id()); 2078874aeea5SJeff Kirsher 20798b7325b4SBen Hutchings rc = efx_check_disabled(efx); 20808b7325b4SBen Hutchings if (rc) 20818b7325b4SBen Hutchings return rc; 2082874aeea5SJeff Kirsher if (efx->phy_mode & PHY_MODE_SPECIAL) 2083874aeea5SJeff Kirsher return -EBUSY; 2084874aeea5SJeff Kirsher if (efx_mcdi_poll_reboot(efx) && efx_reset(efx, RESET_TYPE_ALL)) 2085874aeea5SJeff Kirsher return -EIO; 2086874aeea5SJeff Kirsher 2087874aeea5SJeff Kirsher /* Notify the kernel of the link state polled during driver load, 2088874aeea5SJeff Kirsher * before the monitor starts running */ 2089874aeea5SJeff Kirsher efx_link_status_changed(efx); 2090874aeea5SJeff Kirsher 2091874aeea5SJeff Kirsher efx_start_all(efx); 2092dd40781eSBen Hutchings efx_selftest_async_start(efx); 2093874aeea5SJeff Kirsher return 0; 2094874aeea5SJeff Kirsher } 2095874aeea5SJeff Kirsher 2096874aeea5SJeff Kirsher /* Context: process, rtnl_lock() held. 2097874aeea5SJeff Kirsher * Note that the kernel will ignore our return code; this method 2098874aeea5SJeff Kirsher * should really be a void. 2099874aeea5SJeff Kirsher */ 2100874aeea5SJeff Kirsher static int efx_net_stop(struct net_device *net_dev) 2101874aeea5SJeff Kirsher { 2102874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 2103874aeea5SJeff Kirsher 2104874aeea5SJeff Kirsher netif_dbg(efx, ifdown, efx->net_dev, "closing on CPU %d\n", 2105874aeea5SJeff Kirsher raw_smp_processor_id()); 2106874aeea5SJeff Kirsher 2107874aeea5SJeff Kirsher /* Stop the device and flush all the channels */ 2108874aeea5SJeff Kirsher efx_stop_all(efx); 2109874aeea5SJeff Kirsher 2110874aeea5SJeff Kirsher return 0; 2111874aeea5SJeff Kirsher } 2112874aeea5SJeff Kirsher 2113874aeea5SJeff Kirsher /* Context: process, dev_base_lock or RTNL held, non-blocking. */ 21142aa9ef11SBen Hutchings static struct rtnl_link_stats64 *efx_net_stats(struct net_device *net_dev, 21152aa9ef11SBen Hutchings struct rtnl_link_stats64 *stats) 2116874aeea5SJeff Kirsher { 2117874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 2118874aeea5SJeff Kirsher 2119874aeea5SJeff Kirsher spin_lock_bh(&efx->stats_lock); 2120cd0ecc9aSBen Hutchings efx->type->update_stats(efx, NULL, stats); 21211cb34522SBen Hutchings spin_unlock_bh(&efx->stats_lock); 21221cb34522SBen Hutchings 2123874aeea5SJeff Kirsher return stats; 2124874aeea5SJeff Kirsher } 2125874aeea5SJeff Kirsher 2126874aeea5SJeff Kirsher /* Context: netif_tx_lock held, BHs disabled. */ 2127874aeea5SJeff Kirsher static void efx_watchdog(struct net_device *net_dev) 2128874aeea5SJeff Kirsher { 2129874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 2130874aeea5SJeff Kirsher 2131874aeea5SJeff Kirsher netif_err(efx, tx_err, efx->net_dev, 2132874aeea5SJeff Kirsher "TX stuck with port_enabled=%d: resetting channels\n", 2133874aeea5SJeff Kirsher efx->port_enabled); 2134874aeea5SJeff Kirsher 2135874aeea5SJeff Kirsher efx_schedule_reset(efx, RESET_TYPE_TX_WATCHDOG); 2136874aeea5SJeff Kirsher } 2137874aeea5SJeff Kirsher 2138874aeea5SJeff Kirsher 2139874aeea5SJeff Kirsher /* Context: process, rtnl_lock() held. */ 2140874aeea5SJeff Kirsher static int efx_change_mtu(struct net_device *net_dev, int new_mtu) 2141874aeea5SJeff Kirsher { 2142874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 21438b7325b4SBen Hutchings int rc; 2144874aeea5SJeff Kirsher 21458b7325b4SBen Hutchings rc = efx_check_disabled(efx); 21468b7325b4SBen Hutchings if (rc) 21478b7325b4SBen Hutchings return rc; 2148874aeea5SJeff Kirsher if (new_mtu > EFX_MAX_MTU) 2149874aeea5SJeff Kirsher return -EINVAL; 2150874aeea5SJeff Kirsher 2151874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "changing MTU to %d\n", new_mtu); 2152874aeea5SJeff Kirsher 215329c69a48SBen Hutchings efx_device_detach_sync(efx); 215429c69a48SBen Hutchings efx_stop_all(efx); 215529c69a48SBen Hutchings 2156874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 2157874aeea5SJeff Kirsher net_dev->mtu = new_mtu; 2158710b208dSBen Hutchings efx->type->reconfigure_mac(efx); 2159874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 2160874aeea5SJeff Kirsher 2161874aeea5SJeff Kirsher efx_start_all(efx); 216229c69a48SBen Hutchings netif_device_attach(efx->net_dev); 21636c8eef4aSBen Hutchings return 0; 2164874aeea5SJeff Kirsher } 2165874aeea5SJeff Kirsher 2166874aeea5SJeff Kirsher static int efx_set_mac_address(struct net_device *net_dev, void *data) 2167874aeea5SJeff Kirsher { 2168874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 2169874aeea5SJeff Kirsher struct sockaddr *addr = data; 2170e0b3ae30SBen Hutchings u8 *new_addr = addr->sa_data; 2171874aeea5SJeff Kirsher 2172874aeea5SJeff Kirsher if (!is_valid_ether_addr(new_addr)) { 2173874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, 2174874aeea5SJeff Kirsher "invalid ethernet MAC address requested: %pM\n", 2175874aeea5SJeff Kirsher new_addr); 2176504f9b5aSDanny Kukawka return -EADDRNOTAVAIL; 2177874aeea5SJeff Kirsher } 2178874aeea5SJeff Kirsher 2179cd84ff4dSEdward Cree ether_addr_copy(net_dev->dev_addr, new_addr); 21807fa8d547SShradha Shah if (efx->type->sriov_mac_address_changed) 2181d98a4ffeSShradha Shah efx->type->sriov_mac_address_changed(efx); 2182874aeea5SJeff Kirsher 2183874aeea5SJeff Kirsher /* Reconfigure the MAC */ 2184874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 2185710b208dSBen Hutchings efx->type->reconfigure_mac(efx); 2186874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 2187874aeea5SJeff Kirsher 2188874aeea5SJeff Kirsher return 0; 2189874aeea5SJeff Kirsher } 2190874aeea5SJeff Kirsher 2191874aeea5SJeff Kirsher /* Context: netif_addr_lock held, BHs disabled. */ 21920fca8c97SBen Hutchings static void efx_set_rx_mode(struct net_device *net_dev) 2193874aeea5SJeff Kirsher { 2194874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 2195874aeea5SJeff Kirsher 2196874aeea5SJeff Kirsher if (efx->port_enabled) 2197874aeea5SJeff Kirsher queue_work(efx->workqueue, &efx->mac_work); 2198874aeea5SJeff Kirsher /* Otherwise efx_start_port() will do this */ 2199874aeea5SJeff Kirsher } 2200874aeea5SJeff Kirsher 2201c8f44affSMichał Mirosław static int efx_set_features(struct net_device *net_dev, netdev_features_t data) 2202874aeea5SJeff Kirsher { 2203874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 2204874aeea5SJeff Kirsher 2205874aeea5SJeff Kirsher /* If disabling RX n-tuple filtering, clear existing filters */ 2206874aeea5SJeff Kirsher if (net_dev->features & ~data & NETIF_F_NTUPLE) 2207fbd79120SBen Hutchings return efx->type->filter_clear_rx(efx, EFX_FILTER_PRI_MANUAL); 2208874aeea5SJeff Kirsher 2209874aeea5SJeff Kirsher return 0; 2210874aeea5SJeff Kirsher } 2211874aeea5SJeff Kirsher 22127fa8d547SShradha Shah static const struct net_device_ops efx_netdev_ops = { 2213874aeea5SJeff Kirsher .ndo_open = efx_net_open, 2214874aeea5SJeff Kirsher .ndo_stop = efx_net_stop, 2215874aeea5SJeff Kirsher .ndo_get_stats64 = efx_net_stats, 2216874aeea5SJeff Kirsher .ndo_tx_timeout = efx_watchdog, 2217874aeea5SJeff Kirsher .ndo_start_xmit = efx_hard_start_xmit, 2218874aeea5SJeff Kirsher .ndo_validate_addr = eth_validate_addr, 2219874aeea5SJeff Kirsher .ndo_do_ioctl = efx_ioctl, 2220874aeea5SJeff Kirsher .ndo_change_mtu = efx_change_mtu, 2221874aeea5SJeff Kirsher .ndo_set_mac_address = efx_set_mac_address, 22220fca8c97SBen Hutchings .ndo_set_rx_mode = efx_set_rx_mode, 2223874aeea5SJeff Kirsher .ndo_set_features = efx_set_features, 2224cd2d5b52SBen Hutchings #ifdef CONFIG_SFC_SRIOV 22257fa8d547SShradha Shah .ndo_set_vf_mac = efx_sriov_set_vf_mac, 22267fa8d547SShradha Shah .ndo_set_vf_vlan = efx_sriov_set_vf_vlan, 22277fa8d547SShradha Shah .ndo_set_vf_spoofchk = efx_sriov_set_vf_spoofchk, 22287fa8d547SShradha Shah .ndo_get_vf_config = efx_sriov_get_vf_config, 2229cd2d5b52SBen Hutchings #endif 2230874aeea5SJeff Kirsher #ifdef CONFIG_NET_POLL_CONTROLLER 2231874aeea5SJeff Kirsher .ndo_poll_controller = efx_netpoll, 2232874aeea5SJeff Kirsher #endif 2233874aeea5SJeff Kirsher .ndo_setup_tc = efx_setup_tc, 223436763266SAlexandre Rames #ifdef CONFIG_NET_RX_BUSY_POLL 223536763266SAlexandre Rames .ndo_busy_poll = efx_busy_poll, 223636763266SAlexandre Rames #endif 2237874aeea5SJeff Kirsher #ifdef CONFIG_RFS_ACCEL 2238874aeea5SJeff Kirsher .ndo_rx_flow_steer = efx_filter_rfs, 2239874aeea5SJeff Kirsher #endif 2240874aeea5SJeff Kirsher }; 2241874aeea5SJeff Kirsher 2242874aeea5SJeff Kirsher static void efx_update_name(struct efx_nic *efx) 2243874aeea5SJeff Kirsher { 2244874aeea5SJeff Kirsher strcpy(efx->name, efx->net_dev->name); 2245874aeea5SJeff Kirsher efx_mtd_rename(efx); 2246874aeea5SJeff Kirsher efx_set_channel_names(efx); 2247874aeea5SJeff Kirsher } 2248874aeea5SJeff Kirsher 2249874aeea5SJeff Kirsher static int efx_netdev_event(struct notifier_block *this, 2250874aeea5SJeff Kirsher unsigned long event, void *ptr) 2251874aeea5SJeff Kirsher { 2252351638e7SJiri Pirko struct net_device *net_dev = netdev_notifier_info_to_dev(ptr); 2253874aeea5SJeff Kirsher 22547fa8d547SShradha Shah if ((net_dev->netdev_ops == &efx_netdev_ops) && 2255874aeea5SJeff Kirsher event == NETDEV_CHANGENAME) 2256874aeea5SJeff Kirsher efx_update_name(netdev_priv(net_dev)); 2257874aeea5SJeff Kirsher 2258874aeea5SJeff Kirsher return NOTIFY_DONE; 2259874aeea5SJeff Kirsher } 2260874aeea5SJeff Kirsher 2261874aeea5SJeff Kirsher static struct notifier_block efx_netdev_notifier = { 2262874aeea5SJeff Kirsher .notifier_call = efx_netdev_event, 2263874aeea5SJeff Kirsher }; 2264874aeea5SJeff Kirsher 2265874aeea5SJeff Kirsher static ssize_t 2266874aeea5SJeff Kirsher show_phy_type(struct device *dev, struct device_attribute *attr, char *buf) 2267874aeea5SJeff Kirsher { 2268874aeea5SJeff Kirsher struct efx_nic *efx = pci_get_drvdata(to_pci_dev(dev)); 2269874aeea5SJeff Kirsher return sprintf(buf, "%d\n", efx->phy_type); 2270874aeea5SJeff Kirsher } 2271776fbcc9SBen Hutchings static DEVICE_ATTR(phy_type, 0444, show_phy_type, NULL); 2272874aeea5SJeff Kirsher 2273874aeea5SJeff Kirsher static int efx_register_netdev(struct efx_nic *efx) 2274874aeea5SJeff Kirsher { 2275874aeea5SJeff Kirsher struct net_device *net_dev = efx->net_dev; 2276874aeea5SJeff Kirsher struct efx_channel *channel; 2277874aeea5SJeff Kirsher int rc; 2278874aeea5SJeff Kirsher 2279874aeea5SJeff Kirsher net_dev->watchdog_timeo = 5 * HZ; 2280874aeea5SJeff Kirsher net_dev->irq = efx->pci_dev->irq; 22817fa8d547SShradha Shah net_dev->netdev_ops = &efx_netdev_ops; 22827fa8d547SShradha Shah if (efx_nic_rev(efx) >= EFX_REV_HUNT_A0) 22838127d661SBen Hutchings net_dev->priv_flags |= IFF_UNICAST_FLT; 22847ad24ea4SWilfried Klaebe net_dev->ethtool_ops = &efx_ethtool_ops; 22857e6d06f0SBen Hutchings net_dev->gso_max_segs = EFX_TSO_MAX_SEGS; 2286874aeea5SJeff Kirsher 2287874aeea5SJeff Kirsher rtnl_lock(); 2288874aeea5SJeff Kirsher 22897153f623SBen Hutchings /* Enable resets to be scheduled and check whether any were 22907153f623SBen Hutchings * already requested. If so, the NIC is probably hosed so we 22917153f623SBen Hutchings * abort. 22927153f623SBen Hutchings */ 22937153f623SBen Hutchings efx->state = STATE_READY; 22947153f623SBen Hutchings smp_mb(); /* ensure we change state before checking reset_pending */ 22957153f623SBen Hutchings if (efx->reset_pending) { 22967153f623SBen Hutchings netif_err(efx, probe, efx->net_dev, 22977153f623SBen Hutchings "aborting probe due to scheduled reset\n"); 22987153f623SBen Hutchings rc = -EIO; 22997153f623SBen Hutchings goto fail_locked; 23007153f623SBen Hutchings } 23017153f623SBen Hutchings 2302874aeea5SJeff Kirsher rc = dev_alloc_name(net_dev, net_dev->name); 2303874aeea5SJeff Kirsher if (rc < 0) 2304874aeea5SJeff Kirsher goto fail_locked; 2305874aeea5SJeff Kirsher efx_update_name(efx); 2306874aeea5SJeff Kirsher 23078f8b3d51SBen Hutchings /* Always start with carrier off; PHY events will detect the link */ 23088f8b3d51SBen Hutchings netif_carrier_off(net_dev); 23098f8b3d51SBen Hutchings 2310874aeea5SJeff Kirsher rc = register_netdevice(net_dev); 2311874aeea5SJeff Kirsher if (rc) 2312874aeea5SJeff Kirsher goto fail_locked; 2313874aeea5SJeff Kirsher 2314874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) { 2315874aeea5SJeff Kirsher struct efx_tx_queue *tx_queue; 2316874aeea5SJeff Kirsher efx_for_each_channel_tx_queue(tx_queue, channel) 2317874aeea5SJeff Kirsher efx_init_tx_queue_core_txq(tx_queue); 2318874aeea5SJeff Kirsher } 2319874aeea5SJeff Kirsher 23200bcf4a64SBen Hutchings efx_associate(efx); 23210bcf4a64SBen Hutchings 2322874aeea5SJeff Kirsher rtnl_unlock(); 2323874aeea5SJeff Kirsher 2324874aeea5SJeff Kirsher rc = device_create_file(&efx->pci_dev->dev, &dev_attr_phy_type); 2325874aeea5SJeff Kirsher if (rc) { 2326874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, 2327874aeea5SJeff Kirsher "failed to init net dev attributes\n"); 2328874aeea5SJeff Kirsher goto fail_registered; 2329874aeea5SJeff Kirsher } 2330874aeea5SJeff Kirsher 2331874aeea5SJeff Kirsher return 0; 2332874aeea5SJeff Kirsher 23337153f623SBen Hutchings fail_registered: 23347153f623SBen Hutchings rtnl_lock(); 23350bcf4a64SBen Hutchings efx_dissociate(efx); 23367153f623SBen Hutchings unregister_netdevice(net_dev); 2337874aeea5SJeff Kirsher fail_locked: 23387153f623SBen Hutchings efx->state = STATE_UNINIT; 2339874aeea5SJeff Kirsher rtnl_unlock(); 2340874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, "could not register net dev\n"); 2341874aeea5SJeff Kirsher return rc; 2342874aeea5SJeff Kirsher } 2343874aeea5SJeff Kirsher 2344874aeea5SJeff Kirsher static void efx_unregister_netdev(struct efx_nic *efx) 2345874aeea5SJeff Kirsher { 2346874aeea5SJeff Kirsher if (!efx->net_dev) 2347874aeea5SJeff Kirsher return; 2348874aeea5SJeff Kirsher 2349874aeea5SJeff Kirsher BUG_ON(netdev_priv(efx->net_dev) != efx); 2350874aeea5SJeff Kirsher 2351874aeea5SJeff Kirsher strlcpy(efx->name, pci_name(efx->pci_dev), sizeof(efx->name)); 2352874aeea5SJeff Kirsher device_remove_file(&efx->pci_dev->dev, &dev_attr_phy_type); 23537153f623SBen Hutchings 23547153f623SBen Hutchings rtnl_lock(); 23557153f623SBen Hutchings unregister_netdevice(efx->net_dev); 23567153f623SBen Hutchings efx->state = STATE_UNINIT; 23577153f623SBen Hutchings rtnl_unlock(); 2358874aeea5SJeff Kirsher } 2359874aeea5SJeff Kirsher 2360874aeea5SJeff Kirsher /************************************************************************** 2361874aeea5SJeff Kirsher * 2362874aeea5SJeff Kirsher * Device reset and suspend 2363874aeea5SJeff Kirsher * 2364874aeea5SJeff Kirsher **************************************************************************/ 2365874aeea5SJeff Kirsher 2366874aeea5SJeff Kirsher /* Tears down the entire software state and most of the hardware state 2367874aeea5SJeff Kirsher * before reset. */ 2368874aeea5SJeff Kirsher void efx_reset_down(struct efx_nic *efx, enum reset_type method) 2369874aeea5SJeff Kirsher { 2370874aeea5SJeff Kirsher EFX_ASSERT_RESET_SERIALISED(efx); 2371874aeea5SJeff Kirsher 2372e283546cSEdward Cree if (method == RESET_TYPE_MCDI_TIMEOUT) 2373e283546cSEdward Cree efx->type->prepare_flr(efx); 2374e283546cSEdward Cree 2375874aeea5SJeff Kirsher efx_stop_all(efx); 2376d8291187SBen Hutchings efx_disable_interrupts(efx); 23775642ceefSBen Hutchings 23785642ceefSBen Hutchings mutex_lock(&efx->mac_lock); 2379874aeea5SJeff Kirsher if (efx->port_initialized && method != RESET_TYPE_INVISIBLE) 2380874aeea5SJeff Kirsher efx->phy_op->fini(efx); 2381874aeea5SJeff Kirsher efx->type->fini(efx); 2382874aeea5SJeff Kirsher } 2383874aeea5SJeff Kirsher 2384874aeea5SJeff Kirsher /* This function will always ensure that the locks acquired in 2385874aeea5SJeff Kirsher * efx_reset_down() are released. A failure return code indicates 2386874aeea5SJeff Kirsher * that we were unable to reinitialise the hardware, and the 2387874aeea5SJeff Kirsher * driver should be disabled. If ok is false, then the rx and tx 2388874aeea5SJeff Kirsher * engines are not restarted, pending a RESET_DISABLE. */ 2389874aeea5SJeff Kirsher int efx_reset_up(struct efx_nic *efx, enum reset_type method, bool ok) 2390874aeea5SJeff Kirsher { 2391874aeea5SJeff Kirsher int rc; 2392874aeea5SJeff Kirsher 2393874aeea5SJeff Kirsher EFX_ASSERT_RESET_SERIALISED(efx); 2394874aeea5SJeff Kirsher 2395e283546cSEdward Cree if (method == RESET_TYPE_MCDI_TIMEOUT) 2396e283546cSEdward Cree efx->type->finish_flr(efx); 2397e283546cSEdward Cree 2398e283546cSEdward Cree /* Ensure that SRAM is initialised even if we're disabling the device */ 2399874aeea5SJeff Kirsher rc = efx->type->init(efx); 2400874aeea5SJeff Kirsher if (rc) { 2401874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, "failed to initialise NIC\n"); 2402874aeea5SJeff Kirsher goto fail; 2403874aeea5SJeff Kirsher } 2404874aeea5SJeff Kirsher 2405874aeea5SJeff Kirsher if (!ok) 2406874aeea5SJeff Kirsher goto fail; 2407874aeea5SJeff Kirsher 2408874aeea5SJeff Kirsher if (efx->port_initialized && method != RESET_TYPE_INVISIBLE) { 2409874aeea5SJeff Kirsher rc = efx->phy_op->init(efx); 2410874aeea5SJeff Kirsher if (rc) 2411874aeea5SJeff Kirsher goto fail; 2412874aeea5SJeff Kirsher if (efx->phy_op->reconfigure(efx)) 2413874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, 2414874aeea5SJeff Kirsher "could not restore PHY settings\n"); 2415874aeea5SJeff Kirsher } 2416874aeea5SJeff Kirsher 2417261e4d96SJon Cooper rc = efx_enable_interrupts(efx); 2418261e4d96SJon Cooper if (rc) 2419261e4d96SJon Cooper goto fail; 2420874aeea5SJeff Kirsher efx_restore_filters(efx); 24217fa8d547SShradha Shah if (efx->type->sriov_reset) 2422d98a4ffeSShradha Shah efx->type->sriov_reset(efx); 2423874aeea5SJeff Kirsher 2424874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 2425874aeea5SJeff Kirsher 2426874aeea5SJeff Kirsher efx_start_all(efx); 2427874aeea5SJeff Kirsher 2428874aeea5SJeff Kirsher return 0; 2429874aeea5SJeff Kirsher 2430874aeea5SJeff Kirsher fail: 2431874aeea5SJeff Kirsher efx->port_initialized = false; 2432874aeea5SJeff Kirsher 2433874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 2434874aeea5SJeff Kirsher 2435874aeea5SJeff Kirsher return rc; 2436874aeea5SJeff Kirsher } 2437874aeea5SJeff Kirsher 2438874aeea5SJeff Kirsher /* Reset the NIC using the specified method. Note that the reset may 2439874aeea5SJeff Kirsher * fail, in which case the card will be left in an unusable state. 2440874aeea5SJeff Kirsher * 2441874aeea5SJeff Kirsher * Caller must hold the rtnl_lock. 2442874aeea5SJeff Kirsher */ 2443874aeea5SJeff Kirsher int efx_reset(struct efx_nic *efx, enum reset_type method) 2444874aeea5SJeff Kirsher { 2445874aeea5SJeff Kirsher int rc, rc2; 2446874aeea5SJeff Kirsher bool disabled; 2447874aeea5SJeff Kirsher 2448874aeea5SJeff Kirsher netif_info(efx, drv, efx->net_dev, "resetting (%s)\n", 2449874aeea5SJeff Kirsher RESET_TYPE(method)); 2450874aeea5SJeff Kirsher 2451c2f3b8e3SDaniel Pieczko efx_device_detach_sync(efx); 2452874aeea5SJeff Kirsher efx_reset_down(efx, method); 2453874aeea5SJeff Kirsher 2454874aeea5SJeff Kirsher rc = efx->type->reset(efx, method); 2455874aeea5SJeff Kirsher if (rc) { 2456874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, "failed to reset hardware\n"); 2457874aeea5SJeff Kirsher goto out; 2458874aeea5SJeff Kirsher } 2459874aeea5SJeff Kirsher 2460874aeea5SJeff Kirsher /* Clear flags for the scopes we covered. We assume the NIC and 2461874aeea5SJeff Kirsher * driver are now quiescent so that there is no race here. 2462874aeea5SJeff Kirsher */ 2463e283546cSEdward Cree if (method < RESET_TYPE_MAX_METHOD) 2464874aeea5SJeff Kirsher efx->reset_pending &= -(1 << (method + 1)); 2465e283546cSEdward Cree else /* it doesn't fit into the well-ordered scope hierarchy */ 2466e283546cSEdward Cree __clear_bit(method, &efx->reset_pending); 2467874aeea5SJeff Kirsher 2468874aeea5SJeff Kirsher /* Reinitialise bus-mastering, which may have been turned off before 2469874aeea5SJeff Kirsher * the reset was scheduled. This is still appropriate, even in the 2470874aeea5SJeff Kirsher * RESET_TYPE_DISABLE since this driver generally assumes the hardware 2471874aeea5SJeff Kirsher * can respond to requests. */ 2472874aeea5SJeff Kirsher pci_set_master(efx->pci_dev); 2473874aeea5SJeff Kirsher 2474874aeea5SJeff Kirsher out: 2475874aeea5SJeff Kirsher /* Leave device stopped if necessary */ 2476626950dbSAlexandre Rames disabled = rc || 2477626950dbSAlexandre Rames method == RESET_TYPE_DISABLE || 2478626950dbSAlexandre Rames method == RESET_TYPE_RECOVER_OR_DISABLE; 2479874aeea5SJeff Kirsher rc2 = efx_reset_up(efx, method, !disabled); 2480874aeea5SJeff Kirsher if (rc2) { 2481874aeea5SJeff Kirsher disabled = true; 2482874aeea5SJeff Kirsher if (!rc) 2483874aeea5SJeff Kirsher rc = rc2; 2484874aeea5SJeff Kirsher } 2485874aeea5SJeff Kirsher 2486874aeea5SJeff Kirsher if (disabled) { 2487874aeea5SJeff Kirsher dev_close(efx->net_dev); 2488874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, "has been disabled\n"); 2489874aeea5SJeff Kirsher efx->state = STATE_DISABLED; 2490874aeea5SJeff Kirsher } else { 2491874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "reset complete\n"); 2492874aeea5SJeff Kirsher netif_device_attach(efx->net_dev); 2493874aeea5SJeff Kirsher } 2494874aeea5SJeff Kirsher return rc; 2495874aeea5SJeff Kirsher } 2496874aeea5SJeff Kirsher 2497626950dbSAlexandre Rames /* Try recovery mechanisms. 2498626950dbSAlexandre Rames * For now only EEH is supported. 2499626950dbSAlexandre Rames * Returns 0 if the recovery mechanisms are unsuccessful. 2500626950dbSAlexandre Rames * Returns a non-zero value otherwise. 2501626950dbSAlexandre Rames */ 2502b28405b0SAlexandre Rames int efx_try_recovery(struct efx_nic *efx) 2503626950dbSAlexandre Rames { 2504626950dbSAlexandre Rames #ifdef CONFIG_EEH 2505626950dbSAlexandre Rames /* A PCI error can occur and not be seen by EEH because nothing 2506626950dbSAlexandre Rames * happens on the PCI bus. In this case the driver may fail and 2507626950dbSAlexandre Rames * schedule a 'recover or reset', leading to this recovery handler. 2508626950dbSAlexandre Rames * Manually call the eeh failure check function. 2509626950dbSAlexandre Rames */ 251012a89dbaSBenjamin Herrenschmidt struct eeh_dev *eehdev = pci_dev_to_eeh_dev(efx->pci_dev); 2511626950dbSAlexandre Rames if (eeh_dev_check_failure(eehdev)) { 2512626950dbSAlexandre Rames /* The EEH mechanisms will handle the error and reset the 2513626950dbSAlexandre Rames * device if necessary. 2514626950dbSAlexandre Rames */ 2515626950dbSAlexandre Rames return 1; 2516626950dbSAlexandre Rames } 2517626950dbSAlexandre Rames #endif 2518626950dbSAlexandre Rames return 0; 2519626950dbSAlexandre Rames } 2520626950dbSAlexandre Rames 252174cd60a4SJon Cooper static void efx_wait_for_bist_end(struct efx_nic *efx) 252274cd60a4SJon Cooper { 252374cd60a4SJon Cooper int i; 252474cd60a4SJon Cooper 252574cd60a4SJon Cooper for (i = 0; i < BIST_WAIT_DELAY_COUNT; ++i) { 252674cd60a4SJon Cooper if (efx_mcdi_poll_reboot(efx)) 252774cd60a4SJon Cooper goto out; 252874cd60a4SJon Cooper msleep(BIST_WAIT_DELAY_MS); 252974cd60a4SJon Cooper } 253074cd60a4SJon Cooper 253174cd60a4SJon Cooper netif_err(efx, drv, efx->net_dev, "Warning: No MC reboot after BIST mode\n"); 253274cd60a4SJon Cooper out: 253374cd60a4SJon Cooper /* Either way unset the BIST flag. If we found no reboot we probably 253474cd60a4SJon Cooper * won't recover, but we should try. 253574cd60a4SJon Cooper */ 253674cd60a4SJon Cooper efx->mc_bist_for_other_fn = false; 253774cd60a4SJon Cooper } 253874cd60a4SJon Cooper 2539874aeea5SJeff Kirsher /* The worker thread exists so that code that cannot sleep can 2540874aeea5SJeff Kirsher * schedule a reset for later. 2541874aeea5SJeff Kirsher */ 2542874aeea5SJeff Kirsher static void efx_reset_work(struct work_struct *data) 2543874aeea5SJeff Kirsher { 2544874aeea5SJeff Kirsher struct efx_nic *efx = container_of(data, struct efx_nic, reset_work); 2545626950dbSAlexandre Rames unsigned long pending; 2546626950dbSAlexandre Rames enum reset_type method; 2547626950dbSAlexandre Rames 2548626950dbSAlexandre Rames pending = ACCESS_ONCE(efx->reset_pending); 2549626950dbSAlexandre Rames method = fls(pending) - 1; 2550626950dbSAlexandre Rames 255174cd60a4SJon Cooper if (method == RESET_TYPE_MC_BIST) 255274cd60a4SJon Cooper efx_wait_for_bist_end(efx); 255374cd60a4SJon Cooper 2554626950dbSAlexandre Rames if ((method == RESET_TYPE_RECOVER_OR_DISABLE || 2555626950dbSAlexandre Rames method == RESET_TYPE_RECOVER_OR_ALL) && 2556626950dbSAlexandre Rames efx_try_recovery(efx)) 2557626950dbSAlexandre Rames return; 2558874aeea5SJeff Kirsher 2559874aeea5SJeff Kirsher if (!pending) 2560874aeea5SJeff Kirsher return; 2561874aeea5SJeff Kirsher 2562874aeea5SJeff Kirsher rtnl_lock(); 25637153f623SBen Hutchings 25647153f623SBen Hutchings /* We checked the state in efx_schedule_reset() but it may 25657153f623SBen Hutchings * have changed by now. Now that we have the RTNL lock, 25667153f623SBen Hutchings * it cannot change again. 25677153f623SBen Hutchings */ 25687153f623SBen Hutchings if (efx->state == STATE_READY) 2569626950dbSAlexandre Rames (void)efx_reset(efx, method); 25707153f623SBen Hutchings 2571874aeea5SJeff Kirsher rtnl_unlock(); 2572874aeea5SJeff Kirsher } 2573874aeea5SJeff Kirsher 2574874aeea5SJeff Kirsher void efx_schedule_reset(struct efx_nic *efx, enum reset_type type) 2575874aeea5SJeff Kirsher { 2576874aeea5SJeff Kirsher enum reset_type method; 2577874aeea5SJeff Kirsher 2578626950dbSAlexandre Rames if (efx->state == STATE_RECOVERY) { 2579626950dbSAlexandre Rames netif_dbg(efx, drv, efx->net_dev, 2580626950dbSAlexandre Rames "recovering: skip scheduling %s reset\n", 2581626950dbSAlexandre Rames RESET_TYPE(type)); 2582626950dbSAlexandre Rames return; 2583626950dbSAlexandre Rames } 2584626950dbSAlexandre Rames 2585874aeea5SJeff Kirsher switch (type) { 2586874aeea5SJeff Kirsher case RESET_TYPE_INVISIBLE: 2587874aeea5SJeff Kirsher case RESET_TYPE_ALL: 2588626950dbSAlexandre Rames case RESET_TYPE_RECOVER_OR_ALL: 2589874aeea5SJeff Kirsher case RESET_TYPE_WORLD: 2590874aeea5SJeff Kirsher case RESET_TYPE_DISABLE: 2591626950dbSAlexandre Rames case RESET_TYPE_RECOVER_OR_DISABLE: 259274cd60a4SJon Cooper case RESET_TYPE_MC_BIST: 2593e283546cSEdward Cree case RESET_TYPE_MCDI_TIMEOUT: 2594874aeea5SJeff Kirsher method = type; 2595874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "scheduling %s reset\n", 2596874aeea5SJeff Kirsher RESET_TYPE(method)); 2597874aeea5SJeff Kirsher break; 2598874aeea5SJeff Kirsher default: 2599874aeea5SJeff Kirsher method = efx->type->map_reset_reason(type); 2600874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, 2601874aeea5SJeff Kirsher "scheduling %s reset for %s\n", 2602874aeea5SJeff Kirsher RESET_TYPE(method), RESET_TYPE(type)); 2603874aeea5SJeff Kirsher break; 2604874aeea5SJeff Kirsher } 2605874aeea5SJeff Kirsher 2606874aeea5SJeff Kirsher set_bit(method, &efx->reset_pending); 26077153f623SBen Hutchings smp_mb(); /* ensure we change reset_pending before checking state */ 26087153f623SBen Hutchings 26097153f623SBen Hutchings /* If we're not READY then just leave the flags set as the cue 26107153f623SBen Hutchings * to abort probing or reschedule the reset later. 26117153f623SBen Hutchings */ 26127153f623SBen Hutchings if (ACCESS_ONCE(efx->state) != STATE_READY) 26137153f623SBen Hutchings return; 2614874aeea5SJeff Kirsher 2615874aeea5SJeff Kirsher /* efx_process_channel() will no longer read events once a 2616874aeea5SJeff Kirsher * reset is scheduled. So switch back to poll'd MCDI completions. */ 2617874aeea5SJeff Kirsher efx_mcdi_mode_poll(efx); 2618874aeea5SJeff Kirsher 2619874aeea5SJeff Kirsher queue_work(reset_workqueue, &efx->reset_work); 2620874aeea5SJeff Kirsher } 2621874aeea5SJeff Kirsher 2622874aeea5SJeff Kirsher /************************************************************************** 2623874aeea5SJeff Kirsher * 2624874aeea5SJeff Kirsher * List of NICs we support 2625874aeea5SJeff Kirsher * 2626874aeea5SJeff Kirsher **************************************************************************/ 2627874aeea5SJeff Kirsher 2628874aeea5SJeff Kirsher /* PCI device ID table */ 26299baa3c34SBenoit Taine static const struct pci_device_id efx_pci_table[] = { 26300e59e7e7SLinus Torvalds {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 26310e59e7e7SLinus Torvalds PCI_DEVICE_ID_SOLARFLARE_SFC4000A_0), 2632874aeea5SJeff Kirsher .driver_data = (unsigned long) &falcon_a1_nic_type}, 26330e59e7e7SLinus Torvalds {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 26340e59e7e7SLinus Torvalds PCI_DEVICE_ID_SOLARFLARE_SFC4000B), 2635874aeea5SJeff Kirsher .driver_data = (unsigned long) &falcon_b0_nic_type}, 2636547c474fSBen Hutchings {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0803), /* SFC9020 */ 2637874aeea5SJeff Kirsher .driver_data = (unsigned long) &siena_a0_nic_type}, 2638547c474fSBen Hutchings {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0813), /* SFL9021 */ 2639874aeea5SJeff Kirsher .driver_data = (unsigned long) &siena_a0_nic_type}, 26408127d661SBen Hutchings {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0903), /* SFC9120 PF */ 26418127d661SBen Hutchings .driver_data = (unsigned long) &efx_hunt_a0_nic_type}, 26423b06a00eSMateusz Wrzesinski {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0923), /* SFC9140 PF */ 26433b06a00eSMateusz Wrzesinski .driver_data = (unsigned long) &efx_hunt_a0_nic_type}, 2644874aeea5SJeff Kirsher {0} /* end of list */ 2645874aeea5SJeff Kirsher }; 2646874aeea5SJeff Kirsher 2647874aeea5SJeff Kirsher /************************************************************************** 2648874aeea5SJeff Kirsher * 2649874aeea5SJeff Kirsher * Dummy PHY/MAC operations 2650874aeea5SJeff Kirsher * 2651874aeea5SJeff Kirsher * Can be used for some unimplemented operations 2652874aeea5SJeff Kirsher * Needed so all function pointers are valid and do not have to be tested 2653874aeea5SJeff Kirsher * before use 2654874aeea5SJeff Kirsher * 2655874aeea5SJeff Kirsher **************************************************************************/ 2656874aeea5SJeff Kirsher int efx_port_dummy_op_int(struct efx_nic *efx) 2657874aeea5SJeff Kirsher { 2658874aeea5SJeff Kirsher return 0; 2659874aeea5SJeff Kirsher } 2660874aeea5SJeff Kirsher void efx_port_dummy_op_void(struct efx_nic *efx) {} 2661874aeea5SJeff Kirsher 2662874aeea5SJeff Kirsher static bool efx_port_dummy_op_poll(struct efx_nic *efx) 2663874aeea5SJeff Kirsher { 2664874aeea5SJeff Kirsher return false; 2665874aeea5SJeff Kirsher } 2666874aeea5SJeff Kirsher 2667874aeea5SJeff Kirsher static const struct efx_phy_operations efx_dummy_phy_operations = { 2668874aeea5SJeff Kirsher .init = efx_port_dummy_op_int, 2669874aeea5SJeff Kirsher .reconfigure = efx_port_dummy_op_int, 2670874aeea5SJeff Kirsher .poll = efx_port_dummy_op_poll, 2671874aeea5SJeff Kirsher .fini = efx_port_dummy_op_void, 2672874aeea5SJeff Kirsher }; 2673874aeea5SJeff Kirsher 2674874aeea5SJeff Kirsher /************************************************************************** 2675874aeea5SJeff Kirsher * 2676874aeea5SJeff Kirsher * Data housekeeping 2677874aeea5SJeff Kirsher * 2678874aeea5SJeff Kirsher **************************************************************************/ 2679874aeea5SJeff Kirsher 2680874aeea5SJeff Kirsher /* This zeroes out and then fills in the invariants in a struct 2681874aeea5SJeff Kirsher * efx_nic (including all sub-structures). 2682874aeea5SJeff Kirsher */ 2683adeb15aaSBen Hutchings static int efx_init_struct(struct efx_nic *efx, 2684874aeea5SJeff Kirsher struct pci_dev *pci_dev, struct net_device *net_dev) 2685874aeea5SJeff Kirsher { 2686874aeea5SJeff Kirsher int i; 2687874aeea5SJeff Kirsher 2688874aeea5SJeff Kirsher /* Initialise common structures */ 26890bcf4a64SBen Hutchings INIT_LIST_HEAD(&efx->node); 26900bcf4a64SBen Hutchings INIT_LIST_HEAD(&efx->secondary_list); 2691874aeea5SJeff Kirsher spin_lock_init(&efx->biu_lock); 2692874aeea5SJeff Kirsher #ifdef CONFIG_SFC_MTD 2693874aeea5SJeff Kirsher INIT_LIST_HEAD(&efx->mtd_list); 2694874aeea5SJeff Kirsher #endif 2695874aeea5SJeff Kirsher INIT_WORK(&efx->reset_work, efx_reset_work); 2696874aeea5SJeff Kirsher INIT_DELAYED_WORK(&efx->monitor_work, efx_monitor); 2697dd40781eSBen Hutchings INIT_DELAYED_WORK(&efx->selftest_work, efx_selftest_async_work); 2698874aeea5SJeff Kirsher efx->pci_dev = pci_dev; 2699874aeea5SJeff Kirsher efx->msg_enable = debug; 2700f16aeea0SBen Hutchings efx->state = STATE_UNINIT; 2701874aeea5SJeff Kirsher strlcpy(efx->name, pci_name(pci_dev), sizeof(efx->name)); 2702874aeea5SJeff Kirsher 2703874aeea5SJeff Kirsher efx->net_dev = net_dev; 270443a3739dSJon Cooper efx->rx_prefix_size = efx->type->rx_prefix_size; 27052ec03014SAndrew Rybchenko efx->rx_ip_align = 27062ec03014SAndrew Rybchenko NET_IP_ALIGN ? (efx->rx_prefix_size + NET_IP_ALIGN) % 4 : 0; 270743a3739dSJon Cooper efx->rx_packet_hash_offset = 270843a3739dSJon Cooper efx->type->rx_hash_offset - efx->type->rx_prefix_size; 2709bd9a265dSJon Cooper efx->rx_packet_ts_offset = 2710bd9a265dSJon Cooper efx->type->rx_ts_offset - efx->type->rx_prefix_size; 2711874aeea5SJeff Kirsher spin_lock_init(&efx->stats_lock); 2712874aeea5SJeff Kirsher mutex_init(&efx->mac_lock); 2713874aeea5SJeff Kirsher efx->phy_op = &efx_dummy_phy_operations; 2714874aeea5SJeff Kirsher efx->mdio.dev = net_dev; 2715874aeea5SJeff Kirsher INIT_WORK(&efx->mac_work, efx_mac_work); 27169f2cb71cSBen Hutchings init_waitqueue_head(&efx->flush_wq); 2717874aeea5SJeff Kirsher 2718874aeea5SJeff Kirsher for (i = 0; i < EFX_MAX_CHANNELS; i++) { 2719874aeea5SJeff Kirsher efx->channel[i] = efx_alloc_channel(efx, i, NULL); 2720874aeea5SJeff Kirsher if (!efx->channel[i]) 2721874aeea5SJeff Kirsher goto fail; 2722d8291187SBen Hutchings efx->msi_context[i].efx = efx; 2723d8291187SBen Hutchings efx->msi_context[i].index = i; 2724874aeea5SJeff Kirsher } 2725874aeea5SJeff Kirsher 2726874aeea5SJeff Kirsher /* Higher numbered interrupt modes are less capable! */ 2727874aeea5SJeff Kirsher efx->interrupt_mode = max(efx->type->max_interrupt_mode, 2728874aeea5SJeff Kirsher interrupt_mode); 2729874aeea5SJeff Kirsher 2730874aeea5SJeff Kirsher /* Would be good to use the net_dev name, but we're too early */ 2731874aeea5SJeff Kirsher snprintf(efx->workqueue_name, sizeof(efx->workqueue_name), "sfc%s", 2732874aeea5SJeff Kirsher pci_name(pci_dev)); 2733874aeea5SJeff Kirsher efx->workqueue = create_singlethread_workqueue(efx->workqueue_name); 2734874aeea5SJeff Kirsher if (!efx->workqueue) 2735874aeea5SJeff Kirsher goto fail; 2736874aeea5SJeff Kirsher 2737874aeea5SJeff Kirsher return 0; 2738874aeea5SJeff Kirsher 2739874aeea5SJeff Kirsher fail: 2740874aeea5SJeff Kirsher efx_fini_struct(efx); 2741874aeea5SJeff Kirsher return -ENOMEM; 2742874aeea5SJeff Kirsher } 2743874aeea5SJeff Kirsher 2744874aeea5SJeff Kirsher static void efx_fini_struct(struct efx_nic *efx) 2745874aeea5SJeff Kirsher { 2746874aeea5SJeff Kirsher int i; 2747874aeea5SJeff Kirsher 2748874aeea5SJeff Kirsher for (i = 0; i < EFX_MAX_CHANNELS; i++) 2749874aeea5SJeff Kirsher kfree(efx->channel[i]); 2750874aeea5SJeff Kirsher 2751ef215e64SBen Hutchings kfree(efx->vpd_sn); 2752ef215e64SBen Hutchings 2753874aeea5SJeff Kirsher if (efx->workqueue) { 2754874aeea5SJeff Kirsher destroy_workqueue(efx->workqueue); 2755874aeea5SJeff Kirsher efx->workqueue = NULL; 2756874aeea5SJeff Kirsher } 2757874aeea5SJeff Kirsher } 2758874aeea5SJeff Kirsher 2759e4d112e4SEdward Cree void efx_update_sw_stats(struct efx_nic *efx, u64 *stats) 2760e4d112e4SEdward Cree { 2761e4d112e4SEdward Cree u64 n_rx_nodesc_trunc = 0; 2762e4d112e4SEdward Cree struct efx_channel *channel; 2763e4d112e4SEdward Cree 2764e4d112e4SEdward Cree efx_for_each_channel(channel, efx) 2765e4d112e4SEdward Cree n_rx_nodesc_trunc += channel->n_rx_nodesc_trunc; 2766e4d112e4SEdward Cree stats[GENERIC_STAT_rx_nodesc_trunc] = n_rx_nodesc_trunc; 2767e4d112e4SEdward Cree stats[GENERIC_STAT_rx_noskb_drops] = atomic_read(&efx->n_rx_noskb_drops); 2768e4d112e4SEdward Cree } 2769e4d112e4SEdward Cree 2770874aeea5SJeff Kirsher /************************************************************************** 2771874aeea5SJeff Kirsher * 2772874aeea5SJeff Kirsher * PCI interface 2773874aeea5SJeff Kirsher * 2774874aeea5SJeff Kirsher **************************************************************************/ 2775874aeea5SJeff Kirsher 2776874aeea5SJeff Kirsher /* Main body of final NIC shutdown code 2777874aeea5SJeff Kirsher * This is called only at module unload (or hotplug removal). 2778874aeea5SJeff Kirsher */ 2779874aeea5SJeff Kirsher static void efx_pci_remove_main(struct efx_nic *efx) 2780874aeea5SJeff Kirsher { 27817153f623SBen Hutchings /* Flush reset_work. It can no longer be scheduled since we 27827153f623SBen Hutchings * are not READY. 27837153f623SBen Hutchings */ 27847153f623SBen Hutchings BUG_ON(efx->state == STATE_READY); 27857153f623SBen Hutchings cancel_work_sync(&efx->reset_work); 27867153f623SBen Hutchings 2787d8291187SBen Hutchings efx_disable_interrupts(efx); 2788874aeea5SJeff Kirsher efx_nic_fini_interrupt(efx); 2789874aeea5SJeff Kirsher efx_fini_port(efx); 2790874aeea5SJeff Kirsher efx->type->fini(efx); 2791874aeea5SJeff Kirsher efx_fini_napi(efx); 2792874aeea5SJeff Kirsher efx_remove_all(efx); 2793874aeea5SJeff Kirsher } 2794874aeea5SJeff Kirsher 2795874aeea5SJeff Kirsher /* Final NIC shutdown 2796874aeea5SJeff Kirsher * This is called only at module unload (or hotplug removal). 2797874aeea5SJeff Kirsher */ 2798874aeea5SJeff Kirsher static void efx_pci_remove(struct pci_dev *pci_dev) 2799874aeea5SJeff Kirsher { 2800874aeea5SJeff Kirsher struct efx_nic *efx; 2801874aeea5SJeff Kirsher 2802874aeea5SJeff Kirsher efx = pci_get_drvdata(pci_dev); 2803874aeea5SJeff Kirsher if (!efx) 2804874aeea5SJeff Kirsher return; 2805874aeea5SJeff Kirsher 2806874aeea5SJeff Kirsher /* Mark the NIC as fini, then stop the interface */ 2807874aeea5SJeff Kirsher rtnl_lock(); 28080bcf4a64SBen Hutchings efx_dissociate(efx); 2809874aeea5SJeff Kirsher dev_close(efx->net_dev); 2810d8291187SBen Hutchings efx_disable_interrupts(efx); 2811874aeea5SJeff Kirsher rtnl_unlock(); 2812874aeea5SJeff Kirsher 28137fa8d547SShradha Shah if (efx->type->sriov_fini) 2814d98a4ffeSShradha Shah efx->type->sriov_fini(efx); 28157fa8d547SShradha Shah 2816874aeea5SJeff Kirsher efx_unregister_netdev(efx); 2817874aeea5SJeff Kirsher 2818874aeea5SJeff Kirsher efx_mtd_remove(efx); 2819874aeea5SJeff Kirsher 2820874aeea5SJeff Kirsher efx_pci_remove_main(efx); 2821874aeea5SJeff Kirsher 2822874aeea5SJeff Kirsher efx_fini_io(efx); 2823874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "shutdown successful\n"); 2824874aeea5SJeff Kirsher 2825874aeea5SJeff Kirsher efx_fini_struct(efx); 2826874aeea5SJeff Kirsher free_netdev(efx->net_dev); 2827626950dbSAlexandre Rames 2828626950dbSAlexandre Rames pci_disable_pcie_error_reporting(pci_dev); 2829874aeea5SJeff Kirsher }; 2830874aeea5SJeff Kirsher 2831460eeaa0SBen Hutchings /* NIC VPD information 2832460eeaa0SBen Hutchings * Called during probe to display the part number of the 2833460eeaa0SBen Hutchings * installed NIC. VPD is potentially very large but this should 2834460eeaa0SBen Hutchings * always appear within the first 512 bytes. 2835460eeaa0SBen Hutchings */ 2836460eeaa0SBen Hutchings #define SFC_VPD_LEN 512 2837ef215e64SBen Hutchings static void efx_probe_vpd_strings(struct efx_nic *efx) 2838460eeaa0SBen Hutchings { 2839460eeaa0SBen Hutchings struct pci_dev *dev = efx->pci_dev; 2840460eeaa0SBen Hutchings char vpd_data[SFC_VPD_LEN]; 2841460eeaa0SBen Hutchings ssize_t vpd_size; 2842ef215e64SBen Hutchings int ro_start, ro_size, i, j; 2843460eeaa0SBen Hutchings 2844460eeaa0SBen Hutchings /* Get the vpd data from the device */ 2845460eeaa0SBen Hutchings vpd_size = pci_read_vpd(dev, 0, sizeof(vpd_data), vpd_data); 2846460eeaa0SBen Hutchings if (vpd_size <= 0) { 2847460eeaa0SBen Hutchings netif_err(efx, drv, efx->net_dev, "Unable to read VPD\n"); 2848460eeaa0SBen Hutchings return; 2849460eeaa0SBen Hutchings } 2850460eeaa0SBen Hutchings 2851460eeaa0SBen Hutchings /* Get the Read only section */ 2852ef215e64SBen Hutchings ro_start = pci_vpd_find_tag(vpd_data, 0, vpd_size, PCI_VPD_LRDT_RO_DATA); 2853ef215e64SBen Hutchings if (ro_start < 0) { 2854460eeaa0SBen Hutchings netif_err(efx, drv, efx->net_dev, "VPD Read-only not found\n"); 2855460eeaa0SBen Hutchings return; 2856460eeaa0SBen Hutchings } 2857460eeaa0SBen Hutchings 2858ef215e64SBen Hutchings ro_size = pci_vpd_lrdt_size(&vpd_data[ro_start]); 2859ef215e64SBen Hutchings j = ro_size; 2860ef215e64SBen Hutchings i = ro_start + PCI_VPD_LRDT_TAG_SIZE; 2861460eeaa0SBen Hutchings if (i + j > vpd_size) 2862460eeaa0SBen Hutchings j = vpd_size - i; 2863460eeaa0SBen Hutchings 2864460eeaa0SBen Hutchings /* Get the Part number */ 2865460eeaa0SBen Hutchings i = pci_vpd_find_info_keyword(vpd_data, i, j, "PN"); 2866460eeaa0SBen Hutchings if (i < 0) { 2867460eeaa0SBen Hutchings netif_err(efx, drv, efx->net_dev, "Part number not found\n"); 2868460eeaa0SBen Hutchings return; 2869460eeaa0SBen Hutchings } 2870460eeaa0SBen Hutchings 2871460eeaa0SBen Hutchings j = pci_vpd_info_field_size(&vpd_data[i]); 2872460eeaa0SBen Hutchings i += PCI_VPD_INFO_FLD_HDR_SIZE; 2873460eeaa0SBen Hutchings if (i + j > vpd_size) { 2874460eeaa0SBen Hutchings netif_err(efx, drv, efx->net_dev, "Incomplete part number\n"); 2875460eeaa0SBen Hutchings return; 2876460eeaa0SBen Hutchings } 2877460eeaa0SBen Hutchings 2878460eeaa0SBen Hutchings netif_info(efx, drv, efx->net_dev, 2879460eeaa0SBen Hutchings "Part Number : %.*s\n", j, &vpd_data[i]); 2880ef215e64SBen Hutchings 2881ef215e64SBen Hutchings i = ro_start + PCI_VPD_LRDT_TAG_SIZE; 2882ef215e64SBen Hutchings j = ro_size; 2883ef215e64SBen Hutchings i = pci_vpd_find_info_keyword(vpd_data, i, j, "SN"); 2884ef215e64SBen Hutchings if (i < 0) { 2885ef215e64SBen Hutchings netif_err(efx, drv, efx->net_dev, "Serial number not found\n"); 2886ef215e64SBen Hutchings return; 2887ef215e64SBen Hutchings } 2888ef215e64SBen Hutchings 2889ef215e64SBen Hutchings j = pci_vpd_info_field_size(&vpd_data[i]); 2890ef215e64SBen Hutchings i += PCI_VPD_INFO_FLD_HDR_SIZE; 2891ef215e64SBen Hutchings if (i + j > vpd_size) { 2892ef215e64SBen Hutchings netif_err(efx, drv, efx->net_dev, "Incomplete serial number\n"); 2893ef215e64SBen Hutchings return; 2894ef215e64SBen Hutchings } 2895ef215e64SBen Hutchings 2896ef215e64SBen Hutchings efx->vpd_sn = kmalloc(j + 1, GFP_KERNEL); 2897ef215e64SBen Hutchings if (!efx->vpd_sn) 2898ef215e64SBen Hutchings return; 2899ef215e64SBen Hutchings 2900ef215e64SBen Hutchings snprintf(efx->vpd_sn, j + 1, "%s", &vpd_data[i]); 2901460eeaa0SBen Hutchings } 2902460eeaa0SBen Hutchings 2903460eeaa0SBen Hutchings 2904874aeea5SJeff Kirsher /* Main body of NIC initialisation 2905874aeea5SJeff Kirsher * This is called at module load (or hotplug insertion, theoretically). 2906874aeea5SJeff Kirsher */ 2907874aeea5SJeff Kirsher static int efx_pci_probe_main(struct efx_nic *efx) 2908874aeea5SJeff Kirsher { 2909874aeea5SJeff Kirsher int rc; 2910874aeea5SJeff Kirsher 2911874aeea5SJeff Kirsher /* Do start-of-day initialisation */ 2912874aeea5SJeff Kirsher rc = efx_probe_all(efx); 2913874aeea5SJeff Kirsher if (rc) 2914874aeea5SJeff Kirsher goto fail1; 2915874aeea5SJeff Kirsher 2916874aeea5SJeff Kirsher efx_init_napi(efx); 2917874aeea5SJeff Kirsher 2918874aeea5SJeff Kirsher rc = efx->type->init(efx); 2919874aeea5SJeff Kirsher if (rc) { 2920874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 2921874aeea5SJeff Kirsher "failed to initialise NIC\n"); 2922874aeea5SJeff Kirsher goto fail3; 2923874aeea5SJeff Kirsher } 2924874aeea5SJeff Kirsher 2925874aeea5SJeff Kirsher rc = efx_init_port(efx); 2926874aeea5SJeff Kirsher if (rc) { 2927874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 2928874aeea5SJeff Kirsher "failed to initialise port\n"); 2929874aeea5SJeff Kirsher goto fail4; 2930874aeea5SJeff Kirsher } 2931874aeea5SJeff Kirsher 2932874aeea5SJeff Kirsher rc = efx_nic_init_interrupt(efx); 2933874aeea5SJeff Kirsher if (rc) 2934874aeea5SJeff Kirsher goto fail5; 2935261e4d96SJon Cooper rc = efx_enable_interrupts(efx); 2936261e4d96SJon Cooper if (rc) 2937261e4d96SJon Cooper goto fail6; 2938874aeea5SJeff Kirsher 2939874aeea5SJeff Kirsher return 0; 2940874aeea5SJeff Kirsher 2941261e4d96SJon Cooper fail6: 2942261e4d96SJon Cooper efx_nic_fini_interrupt(efx); 2943874aeea5SJeff Kirsher fail5: 2944874aeea5SJeff Kirsher efx_fini_port(efx); 2945874aeea5SJeff Kirsher fail4: 2946874aeea5SJeff Kirsher efx->type->fini(efx); 2947874aeea5SJeff Kirsher fail3: 2948874aeea5SJeff Kirsher efx_fini_napi(efx); 2949874aeea5SJeff Kirsher efx_remove_all(efx); 2950874aeea5SJeff Kirsher fail1: 2951874aeea5SJeff Kirsher return rc; 2952874aeea5SJeff Kirsher } 2953874aeea5SJeff Kirsher 2954874aeea5SJeff Kirsher /* NIC initialisation 2955874aeea5SJeff Kirsher * 2956874aeea5SJeff Kirsher * This is called at module load (or hotplug insertion, 295773ba7b68SBen Hutchings * theoretically). It sets up PCI mappings, resets the NIC, 2958874aeea5SJeff Kirsher * sets up and registers the network devices with the kernel and hooks 2959874aeea5SJeff Kirsher * the interrupt service routine. It does not prepare the device for 2960874aeea5SJeff Kirsher * transmission; this is left to the first time one of the network 2961874aeea5SJeff Kirsher * interfaces is brought up (i.e. efx_net_open). 2962874aeea5SJeff Kirsher */ 296387d1fc11SBill Pemberton static int efx_pci_probe(struct pci_dev *pci_dev, 2964874aeea5SJeff Kirsher const struct pci_device_id *entry) 2965874aeea5SJeff Kirsher { 2966874aeea5SJeff Kirsher struct net_device *net_dev; 2967874aeea5SJeff Kirsher struct efx_nic *efx; 2968fadac6aaSBen Hutchings int rc; 2969874aeea5SJeff Kirsher 2970874aeea5SJeff Kirsher /* Allocate and initialise a struct net_device and struct efx_nic */ 2971874aeea5SJeff Kirsher net_dev = alloc_etherdev_mqs(sizeof(*efx), EFX_MAX_CORE_TX_QUEUES, 2972874aeea5SJeff Kirsher EFX_MAX_RX_QUEUES); 2973874aeea5SJeff Kirsher if (!net_dev) 2974874aeea5SJeff Kirsher return -ENOMEM; 2975adeb15aaSBen Hutchings efx = netdev_priv(net_dev); 2976adeb15aaSBen Hutchings efx->type = (const struct efx_nic_type *) entry->driver_data; 2977adeb15aaSBen Hutchings net_dev->features |= (efx->type->offload_features | NETIF_F_SG | 2978874aeea5SJeff Kirsher NETIF_F_HIGHDMA | NETIF_F_TSO | 2979874aeea5SJeff Kirsher NETIF_F_RXCSUM); 2980adeb15aaSBen Hutchings if (efx->type->offload_features & NETIF_F_V6_CSUM) 2981874aeea5SJeff Kirsher net_dev->features |= NETIF_F_TSO6; 2982874aeea5SJeff Kirsher /* Mask for features that also apply to VLAN devices */ 2983874aeea5SJeff Kirsher net_dev->vlan_features |= (NETIF_F_ALL_CSUM | NETIF_F_SG | 2984874aeea5SJeff Kirsher NETIF_F_HIGHDMA | NETIF_F_ALL_TSO | 2985874aeea5SJeff Kirsher NETIF_F_RXCSUM); 2986874aeea5SJeff Kirsher /* All offloads can be toggled */ 2987874aeea5SJeff Kirsher net_dev->hw_features = net_dev->features & ~NETIF_F_HIGHDMA; 2988874aeea5SJeff Kirsher pci_set_drvdata(pci_dev, efx); 2989874aeea5SJeff Kirsher SET_NETDEV_DEV(net_dev, &pci_dev->dev); 2990adeb15aaSBen Hutchings rc = efx_init_struct(efx, pci_dev, net_dev); 2991874aeea5SJeff Kirsher if (rc) 2992874aeea5SJeff Kirsher goto fail1; 2993874aeea5SJeff Kirsher 2994874aeea5SJeff Kirsher netif_info(efx, probe, efx->net_dev, 2995874aeea5SJeff Kirsher "Solarflare NIC detected\n"); 2996874aeea5SJeff Kirsher 2997ef215e64SBen Hutchings efx_probe_vpd_strings(efx); 2998460eeaa0SBen Hutchings 2999874aeea5SJeff Kirsher /* Set up basic I/O (BAR mappings etc) */ 3000874aeea5SJeff Kirsher rc = efx_init_io(efx); 3001874aeea5SJeff Kirsher if (rc) 3002874aeea5SJeff Kirsher goto fail2; 3003874aeea5SJeff Kirsher 3004874aeea5SJeff Kirsher rc = efx_pci_probe_main(efx); 3005fadac6aaSBen Hutchings if (rc) 3006874aeea5SJeff Kirsher goto fail3; 3007874aeea5SJeff Kirsher 3008874aeea5SJeff Kirsher rc = efx_register_netdev(efx); 3009874aeea5SJeff Kirsher if (rc) 3010fadac6aaSBen Hutchings goto fail4; 3011874aeea5SJeff Kirsher 30127fa8d547SShradha Shah if (efx->type->sriov_init) { 3013d98a4ffeSShradha Shah rc = efx->type->sriov_init(efx); 3014cd2d5b52SBen Hutchings if (rc) 3015cd2d5b52SBen Hutchings netif_err(efx, probe, efx->net_dev, 3016cd2d5b52SBen Hutchings "SR-IOV can't be enabled rc %d\n", rc); 30177fa8d547SShradha Shah } 3018cd2d5b52SBen Hutchings 3019874aeea5SJeff Kirsher netif_dbg(efx, probe, efx->net_dev, "initialisation successful\n"); 3020874aeea5SJeff Kirsher 30217c43161cSBen Hutchings /* Try to create MTDs, but allow this to fail */ 3022874aeea5SJeff Kirsher rtnl_lock(); 30237c43161cSBen Hutchings rc = efx_mtd_probe(efx); 3024874aeea5SJeff Kirsher rtnl_unlock(); 30257c43161cSBen Hutchings if (rc) 30267c43161cSBen Hutchings netif_warn(efx, probe, efx->net_dev, 30277c43161cSBen Hutchings "failed to create MTDs (%d)\n", rc); 30287c43161cSBen Hutchings 3029626950dbSAlexandre Rames rc = pci_enable_pcie_error_reporting(pci_dev); 3030626950dbSAlexandre Rames if (rc && rc != -EINVAL) 3031626950dbSAlexandre Rames netif_warn(efx, probe, efx->net_dev, 3032626950dbSAlexandre Rames "pci_enable_pcie_error_reporting failed (%d)\n", rc); 3033626950dbSAlexandre Rames 3034874aeea5SJeff Kirsher return 0; 3035874aeea5SJeff Kirsher 3036874aeea5SJeff Kirsher fail4: 3037fadac6aaSBen Hutchings efx_pci_remove_main(efx); 3038874aeea5SJeff Kirsher fail3: 3039874aeea5SJeff Kirsher efx_fini_io(efx); 3040874aeea5SJeff Kirsher fail2: 3041874aeea5SJeff Kirsher efx_fini_struct(efx); 3042874aeea5SJeff Kirsher fail1: 3043874aeea5SJeff Kirsher WARN_ON(rc > 0); 3044874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "initialisation failed. rc=%d\n", rc); 3045874aeea5SJeff Kirsher free_netdev(net_dev); 3046874aeea5SJeff Kirsher return rc; 3047874aeea5SJeff Kirsher } 3048874aeea5SJeff Kirsher 3049834e23ddSShradha Shah /* efx_pci_sriov_configure returns the actual number of Virtual Functions 3050834e23ddSShradha Shah * enabled on success 3051834e23ddSShradha Shah */ 3052834e23ddSShradha Shah #ifdef CONFIG_SFC_SRIOV 3053834e23ddSShradha Shah static int efx_pci_sriov_configure(struct pci_dev *dev, int num_vfs) 3054834e23ddSShradha Shah { 3055834e23ddSShradha Shah int rc; 3056834e23ddSShradha Shah struct efx_nic *efx = pci_get_drvdata(dev); 3057834e23ddSShradha Shah 3058834e23ddSShradha Shah if (efx->type->sriov_configure) { 3059834e23ddSShradha Shah rc = efx->type->sriov_configure(efx, num_vfs); 3060834e23ddSShradha Shah if (rc) 3061834e23ddSShradha Shah return rc; 3062834e23ddSShradha Shah else 3063834e23ddSShradha Shah return num_vfs; 3064834e23ddSShradha Shah } else 3065834e23ddSShradha Shah return -EOPNOTSUPP; 3066834e23ddSShradha Shah } 3067834e23ddSShradha Shah #endif 3068834e23ddSShradha Shah 3069874aeea5SJeff Kirsher static int efx_pm_freeze(struct device *dev) 3070874aeea5SJeff Kirsher { 3071874aeea5SJeff Kirsher struct efx_nic *efx = pci_get_drvdata(to_pci_dev(dev)); 3072874aeea5SJeff Kirsher 307361da026dSBen Hutchings rtnl_lock(); 307461da026dSBen Hutchings 30756032fb56SBen Hutchings if (efx->state != STATE_DISABLED) { 3076f16aeea0SBen Hutchings efx->state = STATE_UNINIT; 3077874aeea5SJeff Kirsher 3078c2f3b8e3SDaniel Pieczko efx_device_detach_sync(efx); 3079874aeea5SJeff Kirsher 3080874aeea5SJeff Kirsher efx_stop_all(efx); 3081d8291187SBen Hutchings efx_disable_interrupts(efx); 30826032fb56SBen Hutchings } 3083874aeea5SJeff Kirsher 308461da026dSBen Hutchings rtnl_unlock(); 308561da026dSBen Hutchings 3086874aeea5SJeff Kirsher return 0; 3087874aeea5SJeff Kirsher } 3088874aeea5SJeff Kirsher 3089874aeea5SJeff Kirsher static int efx_pm_thaw(struct device *dev) 3090874aeea5SJeff Kirsher { 3091261e4d96SJon Cooper int rc; 3092874aeea5SJeff Kirsher struct efx_nic *efx = pci_get_drvdata(to_pci_dev(dev)); 3093874aeea5SJeff Kirsher 309461da026dSBen Hutchings rtnl_lock(); 309561da026dSBen Hutchings 30966032fb56SBen Hutchings if (efx->state != STATE_DISABLED) { 3097261e4d96SJon Cooper rc = efx_enable_interrupts(efx); 3098261e4d96SJon Cooper if (rc) 3099261e4d96SJon Cooper goto fail; 3100874aeea5SJeff Kirsher 3101874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 3102874aeea5SJeff Kirsher efx->phy_op->reconfigure(efx); 3103874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 3104874aeea5SJeff Kirsher 3105874aeea5SJeff Kirsher efx_start_all(efx); 3106874aeea5SJeff Kirsher 3107874aeea5SJeff Kirsher netif_device_attach(efx->net_dev); 3108874aeea5SJeff Kirsher 3109f16aeea0SBen Hutchings efx->state = STATE_READY; 3110874aeea5SJeff Kirsher 3111874aeea5SJeff Kirsher efx->type->resume_wol(efx); 31126032fb56SBen Hutchings } 3113874aeea5SJeff Kirsher 311461da026dSBen Hutchings rtnl_unlock(); 311561da026dSBen Hutchings 3116874aeea5SJeff Kirsher /* Reschedule any quenched resets scheduled during efx_pm_freeze() */ 3117874aeea5SJeff Kirsher queue_work(reset_workqueue, &efx->reset_work); 3118874aeea5SJeff Kirsher 3119874aeea5SJeff Kirsher return 0; 3120261e4d96SJon Cooper 3121261e4d96SJon Cooper fail: 3122261e4d96SJon Cooper rtnl_unlock(); 3123261e4d96SJon Cooper 3124261e4d96SJon Cooper return rc; 3125874aeea5SJeff Kirsher } 3126874aeea5SJeff Kirsher 3127874aeea5SJeff Kirsher static int efx_pm_poweroff(struct device *dev) 3128874aeea5SJeff Kirsher { 3129874aeea5SJeff Kirsher struct pci_dev *pci_dev = to_pci_dev(dev); 3130874aeea5SJeff Kirsher struct efx_nic *efx = pci_get_drvdata(pci_dev); 3131874aeea5SJeff Kirsher 3132874aeea5SJeff Kirsher efx->type->fini(efx); 3133874aeea5SJeff Kirsher 3134874aeea5SJeff Kirsher efx->reset_pending = 0; 3135874aeea5SJeff Kirsher 3136874aeea5SJeff Kirsher pci_save_state(pci_dev); 3137874aeea5SJeff Kirsher return pci_set_power_state(pci_dev, PCI_D3hot); 3138874aeea5SJeff Kirsher } 3139874aeea5SJeff Kirsher 3140874aeea5SJeff Kirsher /* Used for both resume and restore */ 3141874aeea5SJeff Kirsher static int efx_pm_resume(struct device *dev) 3142874aeea5SJeff Kirsher { 3143874aeea5SJeff Kirsher struct pci_dev *pci_dev = to_pci_dev(dev); 3144874aeea5SJeff Kirsher struct efx_nic *efx = pci_get_drvdata(pci_dev); 3145874aeea5SJeff Kirsher int rc; 3146874aeea5SJeff Kirsher 3147874aeea5SJeff Kirsher rc = pci_set_power_state(pci_dev, PCI_D0); 3148874aeea5SJeff Kirsher if (rc) 3149874aeea5SJeff Kirsher return rc; 3150874aeea5SJeff Kirsher pci_restore_state(pci_dev); 3151874aeea5SJeff Kirsher rc = pci_enable_device(pci_dev); 3152874aeea5SJeff Kirsher if (rc) 3153874aeea5SJeff Kirsher return rc; 3154874aeea5SJeff Kirsher pci_set_master(efx->pci_dev); 3155874aeea5SJeff Kirsher rc = efx->type->reset(efx, RESET_TYPE_ALL); 3156874aeea5SJeff Kirsher if (rc) 3157874aeea5SJeff Kirsher return rc; 3158874aeea5SJeff Kirsher rc = efx->type->init(efx); 3159874aeea5SJeff Kirsher if (rc) 3160874aeea5SJeff Kirsher return rc; 3161261e4d96SJon Cooper rc = efx_pm_thaw(dev); 3162261e4d96SJon Cooper return rc; 3163874aeea5SJeff Kirsher } 3164874aeea5SJeff Kirsher 3165874aeea5SJeff Kirsher static int efx_pm_suspend(struct device *dev) 3166874aeea5SJeff Kirsher { 3167874aeea5SJeff Kirsher int rc; 3168874aeea5SJeff Kirsher 3169874aeea5SJeff Kirsher efx_pm_freeze(dev); 3170874aeea5SJeff Kirsher rc = efx_pm_poweroff(dev); 3171874aeea5SJeff Kirsher if (rc) 3172874aeea5SJeff Kirsher efx_pm_resume(dev); 3173874aeea5SJeff Kirsher return rc; 3174874aeea5SJeff Kirsher } 3175874aeea5SJeff Kirsher 317618e83e4cSBen Hutchings static const struct dev_pm_ops efx_pm_ops = { 3177874aeea5SJeff Kirsher .suspend = efx_pm_suspend, 3178874aeea5SJeff Kirsher .resume = efx_pm_resume, 3179874aeea5SJeff Kirsher .freeze = efx_pm_freeze, 3180874aeea5SJeff Kirsher .thaw = efx_pm_thaw, 3181874aeea5SJeff Kirsher .poweroff = efx_pm_poweroff, 3182874aeea5SJeff Kirsher .restore = efx_pm_resume, 3183874aeea5SJeff Kirsher }; 3184874aeea5SJeff Kirsher 3185626950dbSAlexandre Rames /* A PCI error affecting this device was detected. 3186626950dbSAlexandre Rames * At this point MMIO and DMA may be disabled. 3187626950dbSAlexandre Rames * Stop the software path and request a slot reset. 3188626950dbSAlexandre Rames */ 3189debd0034Sstephen hemminger static pci_ers_result_t efx_io_error_detected(struct pci_dev *pdev, 3190626950dbSAlexandre Rames enum pci_channel_state state) 3191626950dbSAlexandre Rames { 3192626950dbSAlexandre Rames pci_ers_result_t status = PCI_ERS_RESULT_RECOVERED; 3193626950dbSAlexandre Rames struct efx_nic *efx = pci_get_drvdata(pdev); 3194626950dbSAlexandre Rames 3195626950dbSAlexandre Rames if (state == pci_channel_io_perm_failure) 3196626950dbSAlexandre Rames return PCI_ERS_RESULT_DISCONNECT; 3197626950dbSAlexandre Rames 3198626950dbSAlexandre Rames rtnl_lock(); 3199626950dbSAlexandre Rames 3200626950dbSAlexandre Rames if (efx->state != STATE_DISABLED) { 3201626950dbSAlexandre Rames efx->state = STATE_RECOVERY; 3202626950dbSAlexandre Rames efx->reset_pending = 0; 3203626950dbSAlexandre Rames 3204626950dbSAlexandre Rames efx_device_detach_sync(efx); 3205626950dbSAlexandre Rames 3206626950dbSAlexandre Rames efx_stop_all(efx); 3207d8291187SBen Hutchings efx_disable_interrupts(efx); 3208626950dbSAlexandre Rames 3209626950dbSAlexandre Rames status = PCI_ERS_RESULT_NEED_RESET; 3210626950dbSAlexandre Rames } else { 3211626950dbSAlexandre Rames /* If the interface is disabled we don't want to do anything 3212626950dbSAlexandre Rames * with it. 3213626950dbSAlexandre Rames */ 3214626950dbSAlexandre Rames status = PCI_ERS_RESULT_RECOVERED; 3215626950dbSAlexandre Rames } 3216626950dbSAlexandre Rames 3217626950dbSAlexandre Rames rtnl_unlock(); 3218626950dbSAlexandre Rames 3219626950dbSAlexandre Rames pci_disable_device(pdev); 3220626950dbSAlexandre Rames 3221626950dbSAlexandre Rames return status; 3222626950dbSAlexandre Rames } 3223626950dbSAlexandre Rames 3224dbedd44eSJoe Perches /* Fake a successful reset, which will be performed later in efx_io_resume. */ 3225debd0034Sstephen hemminger static pci_ers_result_t efx_io_slot_reset(struct pci_dev *pdev) 3226626950dbSAlexandre Rames { 3227626950dbSAlexandre Rames struct efx_nic *efx = pci_get_drvdata(pdev); 3228626950dbSAlexandre Rames pci_ers_result_t status = PCI_ERS_RESULT_RECOVERED; 3229626950dbSAlexandre Rames int rc; 3230626950dbSAlexandre Rames 3231626950dbSAlexandre Rames if (pci_enable_device(pdev)) { 3232626950dbSAlexandre Rames netif_err(efx, hw, efx->net_dev, 3233626950dbSAlexandre Rames "Cannot re-enable PCI device after reset.\n"); 3234626950dbSAlexandre Rames status = PCI_ERS_RESULT_DISCONNECT; 3235626950dbSAlexandre Rames } 3236626950dbSAlexandre Rames 3237626950dbSAlexandre Rames rc = pci_cleanup_aer_uncorrect_error_status(pdev); 3238626950dbSAlexandre Rames if (rc) { 3239626950dbSAlexandre Rames netif_err(efx, hw, efx->net_dev, 3240626950dbSAlexandre Rames "pci_cleanup_aer_uncorrect_error_status failed (%d)\n", rc); 3241626950dbSAlexandre Rames /* Non-fatal error. Continue. */ 3242626950dbSAlexandre Rames } 3243626950dbSAlexandre Rames 3244626950dbSAlexandre Rames return status; 3245626950dbSAlexandre Rames } 3246626950dbSAlexandre Rames 3247626950dbSAlexandre Rames /* Perform the actual reset and resume I/O operations. */ 3248626950dbSAlexandre Rames static void efx_io_resume(struct pci_dev *pdev) 3249626950dbSAlexandre Rames { 3250626950dbSAlexandre Rames struct efx_nic *efx = pci_get_drvdata(pdev); 3251626950dbSAlexandre Rames int rc; 3252626950dbSAlexandre Rames 3253626950dbSAlexandre Rames rtnl_lock(); 3254626950dbSAlexandre Rames 3255626950dbSAlexandre Rames if (efx->state == STATE_DISABLED) 3256626950dbSAlexandre Rames goto out; 3257626950dbSAlexandre Rames 3258626950dbSAlexandre Rames rc = efx_reset(efx, RESET_TYPE_ALL); 3259626950dbSAlexandre Rames if (rc) { 3260626950dbSAlexandre Rames netif_err(efx, hw, efx->net_dev, 3261626950dbSAlexandre Rames "efx_reset failed after PCI error (%d)\n", rc); 3262626950dbSAlexandre Rames } else { 3263626950dbSAlexandre Rames efx->state = STATE_READY; 3264626950dbSAlexandre Rames netif_dbg(efx, hw, efx->net_dev, 3265626950dbSAlexandre Rames "Done resetting and resuming IO after PCI error.\n"); 3266626950dbSAlexandre Rames } 3267626950dbSAlexandre Rames 3268626950dbSAlexandre Rames out: 3269626950dbSAlexandre Rames rtnl_unlock(); 3270626950dbSAlexandre Rames } 3271626950dbSAlexandre Rames 3272626950dbSAlexandre Rames /* For simplicity and reliability, we always require a slot reset and try to 3273626950dbSAlexandre Rames * reset the hardware when a pci error affecting the device is detected. 3274626950dbSAlexandre Rames * We leave both the link_reset and mmio_enabled callback unimplemented: 3275626950dbSAlexandre Rames * with our request for slot reset the mmio_enabled callback will never be 3276626950dbSAlexandre Rames * called, and the link_reset callback is not used by AER or EEH mechanisms. 3277626950dbSAlexandre Rames */ 3278626950dbSAlexandre Rames static struct pci_error_handlers efx_err_handlers = { 3279626950dbSAlexandre Rames .error_detected = efx_io_error_detected, 3280626950dbSAlexandre Rames .slot_reset = efx_io_slot_reset, 3281626950dbSAlexandre Rames .resume = efx_io_resume, 3282626950dbSAlexandre Rames }; 3283626950dbSAlexandre Rames 3284874aeea5SJeff Kirsher static struct pci_driver efx_pci_driver = { 3285874aeea5SJeff Kirsher .name = KBUILD_MODNAME, 3286874aeea5SJeff Kirsher .id_table = efx_pci_table, 3287874aeea5SJeff Kirsher .probe = efx_pci_probe, 3288874aeea5SJeff Kirsher .remove = efx_pci_remove, 3289874aeea5SJeff Kirsher .driver.pm = &efx_pm_ops, 3290626950dbSAlexandre Rames .err_handler = &efx_err_handlers, 3291834e23ddSShradha Shah #ifdef CONFIG_SFC_SRIOV 3292834e23ddSShradha Shah .sriov_configure = efx_pci_sriov_configure, 3293834e23ddSShradha Shah #endif 3294874aeea5SJeff Kirsher }; 3295874aeea5SJeff Kirsher 3296874aeea5SJeff Kirsher /************************************************************************** 3297874aeea5SJeff Kirsher * 3298874aeea5SJeff Kirsher * Kernel module interface 3299874aeea5SJeff Kirsher * 3300874aeea5SJeff Kirsher *************************************************************************/ 3301874aeea5SJeff Kirsher 3302874aeea5SJeff Kirsher module_param(interrupt_mode, uint, 0444); 3303874aeea5SJeff Kirsher MODULE_PARM_DESC(interrupt_mode, 3304874aeea5SJeff Kirsher "Interrupt mode (0=>MSIX 1=>MSI 2=>legacy)"); 3305874aeea5SJeff Kirsher 3306874aeea5SJeff Kirsher static int __init efx_init_module(void) 3307874aeea5SJeff Kirsher { 3308874aeea5SJeff Kirsher int rc; 3309874aeea5SJeff Kirsher 3310874aeea5SJeff Kirsher printk(KERN_INFO "Solarflare NET driver v" EFX_DRIVER_VERSION "\n"); 3311874aeea5SJeff Kirsher 3312874aeea5SJeff Kirsher rc = register_netdevice_notifier(&efx_netdev_notifier); 3313874aeea5SJeff Kirsher if (rc) 3314874aeea5SJeff Kirsher goto err_notifier; 3315874aeea5SJeff Kirsher 33167fa8d547SShradha Shah #ifdef CONFIG_SFC_SRIOV 3317cd2d5b52SBen Hutchings rc = efx_init_sriov(); 3318cd2d5b52SBen Hutchings if (rc) 3319cd2d5b52SBen Hutchings goto err_sriov; 33207fa8d547SShradha Shah #endif 3321cd2d5b52SBen Hutchings 3322874aeea5SJeff Kirsher reset_workqueue = create_singlethread_workqueue("sfc_reset"); 3323874aeea5SJeff Kirsher if (!reset_workqueue) { 3324874aeea5SJeff Kirsher rc = -ENOMEM; 3325874aeea5SJeff Kirsher goto err_reset; 3326874aeea5SJeff Kirsher } 3327874aeea5SJeff Kirsher 3328874aeea5SJeff Kirsher rc = pci_register_driver(&efx_pci_driver); 3329874aeea5SJeff Kirsher if (rc < 0) 3330874aeea5SJeff Kirsher goto err_pci; 3331874aeea5SJeff Kirsher 3332874aeea5SJeff Kirsher return 0; 3333874aeea5SJeff Kirsher 3334874aeea5SJeff Kirsher err_pci: 3335874aeea5SJeff Kirsher destroy_workqueue(reset_workqueue); 3336874aeea5SJeff Kirsher err_reset: 33377fa8d547SShradha Shah #ifdef CONFIG_SFC_SRIOV 3338cd2d5b52SBen Hutchings efx_fini_sriov(); 3339cd2d5b52SBen Hutchings err_sriov: 33407fa8d547SShradha Shah #endif 3341874aeea5SJeff Kirsher unregister_netdevice_notifier(&efx_netdev_notifier); 3342874aeea5SJeff Kirsher err_notifier: 3343874aeea5SJeff Kirsher return rc; 3344874aeea5SJeff Kirsher } 3345874aeea5SJeff Kirsher 3346874aeea5SJeff Kirsher static void __exit efx_exit_module(void) 3347874aeea5SJeff Kirsher { 3348874aeea5SJeff Kirsher printk(KERN_INFO "Solarflare NET driver unloading\n"); 3349874aeea5SJeff Kirsher 3350874aeea5SJeff Kirsher pci_unregister_driver(&efx_pci_driver); 3351874aeea5SJeff Kirsher destroy_workqueue(reset_workqueue); 33527fa8d547SShradha Shah #ifdef CONFIG_SFC_SRIOV 3353cd2d5b52SBen Hutchings efx_fini_sriov(); 33547fa8d547SShradha Shah #endif 3355874aeea5SJeff Kirsher unregister_netdevice_notifier(&efx_netdev_notifier); 3356874aeea5SJeff Kirsher 3357874aeea5SJeff Kirsher } 3358874aeea5SJeff Kirsher 3359874aeea5SJeff Kirsher module_init(efx_init_module); 3360874aeea5SJeff Kirsher module_exit(efx_exit_module); 3361874aeea5SJeff Kirsher 3362874aeea5SJeff Kirsher MODULE_AUTHOR("Solarflare Communications and " 3363874aeea5SJeff Kirsher "Michael Brown <mbrown@fensystems.co.uk>"); 33646a350fdbSBen Hutchings MODULE_DESCRIPTION("Solarflare network driver"); 3365874aeea5SJeff Kirsher MODULE_LICENSE("GPL"); 3366874aeea5SJeff Kirsher MODULE_DEVICE_TABLE(pci, efx_pci_table); 3367