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", 80087e9025SJon Cooper [RESET_TYPE_DATAPATH] = "DATAPATH", 81e283546cSEdward Cree [RESET_TYPE_MC_BIST] = "MC_BIST", 82874aeea5SJeff Kirsher [RESET_TYPE_DISABLE] = "DISABLE", 83874aeea5SJeff Kirsher [RESET_TYPE_TX_WATCHDOG] = "TX_WATCHDOG", 84874aeea5SJeff Kirsher [RESET_TYPE_INT_ERROR] = "INT_ERROR", 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 */ 117b0fbdae1SShradha Shah bool efx_separate_tx_channels; 118b0fbdae1SShradha Shah module_param(efx_separate_tx_channels, bool, 0444); 119b0fbdae1SShradha Shah MODULE_PARM_DESC(efx_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 { 247c936835cSPeter Dunning struct efx_tx_queue *tx_queue; 248874aeea5SJeff Kirsher int spent; 249874aeea5SJeff Kirsher 2509f2cb71cSBen Hutchings if (unlikely(!channel->enabled)) 251874aeea5SJeff Kirsher return 0; 252874aeea5SJeff Kirsher 253c936835cSPeter Dunning efx_for_each_channel_tx_queue(tx_queue, channel) { 254c936835cSPeter Dunning tx_queue->pkts_compl = 0; 255c936835cSPeter Dunning tx_queue->bytes_compl = 0; 256c936835cSPeter Dunning } 257c936835cSPeter Dunning 258874aeea5SJeff Kirsher spent = efx_nic_process_eventq(channel, budget); 259d9ab7007SBen Hutchings if (spent && efx_channel_has_rx_queue(channel)) { 260d9ab7007SBen Hutchings struct efx_rx_queue *rx_queue = 261d9ab7007SBen Hutchings efx_channel_get_rx_queue(channel); 262874aeea5SJeff Kirsher 263ff734ef4SBen Hutchings efx_rx_flush_packet(channel); 264cce28794SJon Cooper efx_fast_push_rx_descriptors(rx_queue, true); 265d9ab7007SBen Hutchings } 266874aeea5SJeff Kirsher 267c936835cSPeter Dunning /* Update BQL */ 268c936835cSPeter Dunning efx_for_each_channel_tx_queue(tx_queue, channel) { 269c936835cSPeter Dunning if (tx_queue->bytes_compl) { 270c936835cSPeter Dunning netdev_tx_completed_queue(tx_queue->core_txq, 271c936835cSPeter Dunning tx_queue->pkts_compl, tx_queue->bytes_compl); 272c936835cSPeter Dunning } 273c936835cSPeter Dunning } 274c936835cSPeter Dunning 275874aeea5SJeff Kirsher return spent; 276874aeea5SJeff Kirsher } 277874aeea5SJeff Kirsher 278874aeea5SJeff Kirsher /* NAPI poll handler 279874aeea5SJeff Kirsher * 280874aeea5SJeff Kirsher * NAPI guarantees serialisation of polls of the same device, which 281874aeea5SJeff Kirsher * provides the guarantee required by efx_process_channel(). 282874aeea5SJeff Kirsher */ 283539de7c5SBert Kenward static void efx_update_irq_mod(struct efx_nic *efx, struct efx_channel *channel) 284539de7c5SBert Kenward { 285539de7c5SBert Kenward int step = efx->irq_mod_step_us; 286539de7c5SBert Kenward 287539de7c5SBert Kenward if (channel->irq_mod_score < irq_adapt_low_thresh) { 288539de7c5SBert Kenward if (channel->irq_moderation_us > step) { 289539de7c5SBert Kenward channel->irq_moderation_us -= step; 290539de7c5SBert Kenward efx->type->push_irq_moderation(channel); 291539de7c5SBert Kenward } 292539de7c5SBert Kenward } else if (channel->irq_mod_score > irq_adapt_high_thresh) { 293539de7c5SBert Kenward if (channel->irq_moderation_us < 294539de7c5SBert Kenward efx->irq_rx_moderation_us) { 295539de7c5SBert Kenward channel->irq_moderation_us += step; 296539de7c5SBert Kenward efx->type->push_irq_moderation(channel); 297539de7c5SBert Kenward } 298539de7c5SBert Kenward } 299539de7c5SBert Kenward 300539de7c5SBert Kenward channel->irq_count = 0; 301539de7c5SBert Kenward channel->irq_mod_score = 0; 302539de7c5SBert Kenward } 303539de7c5SBert Kenward 304874aeea5SJeff Kirsher static int efx_poll(struct napi_struct *napi, int budget) 305874aeea5SJeff Kirsher { 306874aeea5SJeff Kirsher struct efx_channel *channel = 307874aeea5SJeff Kirsher container_of(napi, struct efx_channel, napi_str); 308874aeea5SJeff Kirsher struct efx_nic *efx = channel->efx; 309874aeea5SJeff Kirsher int spent; 310874aeea5SJeff Kirsher 311874aeea5SJeff Kirsher netif_vdbg(efx, intr, efx->net_dev, 312874aeea5SJeff Kirsher "channel %d NAPI poll executing on CPU %d\n", 313874aeea5SJeff Kirsher channel->channel, raw_smp_processor_id()); 314874aeea5SJeff Kirsher 315874aeea5SJeff Kirsher spent = efx_process_channel(channel, budget); 316874aeea5SJeff Kirsher 317874aeea5SJeff Kirsher if (spent < budget) { 3189d9a6973SBen Hutchings if (efx_channel_has_rx_queue(channel) && 319874aeea5SJeff Kirsher efx->irq_rx_adaptive && 320874aeea5SJeff Kirsher unlikely(++channel->irq_count == 1000)) { 321539de7c5SBert Kenward efx_update_irq_mod(efx, channel); 322874aeea5SJeff Kirsher } 323874aeea5SJeff Kirsher 324874aeea5SJeff Kirsher efx_filter_rfs_expire(channel); 325874aeea5SJeff Kirsher 326874aeea5SJeff Kirsher /* There is no race here; although napi_disable() will 327874aeea5SJeff Kirsher * only wait for napi_complete(), this isn't a problem 328514bedbcSBen Hutchings * since efx_nic_eventq_read_ack() will have no effect if 329874aeea5SJeff Kirsher * interrupts have already been disabled. 330874aeea5SJeff Kirsher */ 331f820c0acSBert Kenward if (napi_complete_done(napi, spent)) 332514bedbcSBen Hutchings efx_nic_eventq_read_ack(channel); 333874aeea5SJeff Kirsher } 334874aeea5SJeff Kirsher 335874aeea5SJeff Kirsher return spent; 336874aeea5SJeff Kirsher } 337874aeea5SJeff Kirsher 338874aeea5SJeff Kirsher /* Create event queue 339874aeea5SJeff Kirsher * Event queue memory allocations are done only once. If the channel 340874aeea5SJeff Kirsher * is reset, the memory buffer will be reused; this guards against 341874aeea5SJeff Kirsher * errors during channel reset and also simplifies interrupt handling. 342874aeea5SJeff Kirsher */ 343874aeea5SJeff Kirsher static int efx_probe_eventq(struct efx_channel *channel) 344874aeea5SJeff Kirsher { 345874aeea5SJeff Kirsher struct efx_nic *efx = channel->efx; 346874aeea5SJeff Kirsher unsigned long entries; 347874aeea5SJeff Kirsher 34886ee5302SBen Hutchings netif_dbg(efx, probe, efx->net_dev, 349874aeea5SJeff Kirsher "chan %d create event queue\n", channel->channel); 350874aeea5SJeff Kirsher 351874aeea5SJeff Kirsher /* Build an event queue with room for one event per tx and rx buffer, 352874aeea5SJeff Kirsher * plus some extra for link state events and MCDI completions. */ 353874aeea5SJeff Kirsher entries = roundup_pow_of_two(efx->rxq_entries + efx->txq_entries + 128); 354e01b16a7SEdward Cree EFX_WARN_ON_PARANOID(entries > EFX_MAX_EVQ_SIZE); 355874aeea5SJeff Kirsher channel->eventq_mask = max(entries, EFX_MIN_EVQ_SIZE) - 1; 356874aeea5SJeff Kirsher 357874aeea5SJeff Kirsher return efx_nic_probe_eventq(channel); 358874aeea5SJeff Kirsher } 359874aeea5SJeff Kirsher 360874aeea5SJeff Kirsher /* Prepare channel's event queue */ 361261e4d96SJon Cooper static int efx_init_eventq(struct efx_channel *channel) 362874aeea5SJeff Kirsher { 36315acb1ceSBen Hutchings struct efx_nic *efx = channel->efx; 364261e4d96SJon Cooper int rc; 365261e4d96SJon Cooper 366261e4d96SJon Cooper EFX_WARN_ON_PARANOID(channel->eventq_init); 367261e4d96SJon Cooper 36815acb1ceSBen Hutchings netif_dbg(efx, drv, efx->net_dev, 369874aeea5SJeff Kirsher "chan %d init event queue\n", channel->channel); 370874aeea5SJeff Kirsher 371261e4d96SJon Cooper rc = efx_nic_init_eventq(channel); 372261e4d96SJon Cooper if (rc == 0) { 37315acb1ceSBen Hutchings efx->type->push_irq_moderation(channel); 374874aeea5SJeff Kirsher channel->eventq_read_ptr = 0; 375be3fc09cSBen Hutchings channel->eventq_init = true; 376874aeea5SJeff Kirsher } 377261e4d96SJon Cooper return rc; 378261e4d96SJon Cooper } 379874aeea5SJeff Kirsher 3809f2cb71cSBen Hutchings /* Enable event queue processing and NAPI */ 38136763266SAlexandre Rames void efx_start_eventq(struct efx_channel *channel) 3829f2cb71cSBen Hutchings { 3839f2cb71cSBen Hutchings netif_dbg(channel->efx, ifup, channel->efx->net_dev, 3849f2cb71cSBen Hutchings "chan %d start event queue\n", channel->channel); 3859f2cb71cSBen Hutchings 386514bedbcSBen Hutchings /* Make sure the NAPI handler sees the enabled flag set */ 3879f2cb71cSBen Hutchings channel->enabled = true; 3889f2cb71cSBen Hutchings smp_wmb(); 3899f2cb71cSBen Hutchings 3909f2cb71cSBen Hutchings napi_enable(&channel->napi_str); 3919f2cb71cSBen Hutchings efx_nic_eventq_read_ack(channel); 3929f2cb71cSBen Hutchings } 3939f2cb71cSBen Hutchings 3949f2cb71cSBen Hutchings /* Disable event queue processing and NAPI */ 39536763266SAlexandre Rames void efx_stop_eventq(struct efx_channel *channel) 3969f2cb71cSBen Hutchings { 3979f2cb71cSBen Hutchings if (!channel->enabled) 3989f2cb71cSBen Hutchings return; 3999f2cb71cSBen Hutchings 4009f2cb71cSBen Hutchings napi_disable(&channel->napi_str); 4019f2cb71cSBen Hutchings channel->enabled = false; 4029f2cb71cSBen Hutchings } 4039f2cb71cSBen Hutchings 404874aeea5SJeff Kirsher static void efx_fini_eventq(struct efx_channel *channel) 405874aeea5SJeff Kirsher { 406be3fc09cSBen Hutchings if (!channel->eventq_init) 407be3fc09cSBen Hutchings return; 408be3fc09cSBen Hutchings 409874aeea5SJeff Kirsher netif_dbg(channel->efx, drv, channel->efx->net_dev, 410874aeea5SJeff Kirsher "chan %d fini event queue\n", channel->channel); 411874aeea5SJeff Kirsher 412874aeea5SJeff Kirsher efx_nic_fini_eventq(channel); 413be3fc09cSBen Hutchings channel->eventq_init = false; 414874aeea5SJeff Kirsher } 415874aeea5SJeff Kirsher 416874aeea5SJeff Kirsher static void efx_remove_eventq(struct efx_channel *channel) 417874aeea5SJeff Kirsher { 418874aeea5SJeff Kirsher netif_dbg(channel->efx, drv, channel->efx->net_dev, 419874aeea5SJeff Kirsher "chan %d remove event queue\n", channel->channel); 420874aeea5SJeff Kirsher 421874aeea5SJeff Kirsher efx_nic_remove_eventq(channel); 422874aeea5SJeff Kirsher } 423874aeea5SJeff Kirsher 424874aeea5SJeff Kirsher /************************************************************************** 425874aeea5SJeff Kirsher * 426874aeea5SJeff Kirsher * Channel handling 427874aeea5SJeff Kirsher * 428874aeea5SJeff Kirsher *************************************************************************/ 429874aeea5SJeff Kirsher 4307f967c01SBen Hutchings /* Allocate and initialise a channel structure. */ 431874aeea5SJeff Kirsher static struct efx_channel * 432874aeea5SJeff Kirsher efx_alloc_channel(struct efx_nic *efx, int i, struct efx_channel *old_channel) 433874aeea5SJeff Kirsher { 434874aeea5SJeff Kirsher struct efx_channel *channel; 435874aeea5SJeff Kirsher struct efx_rx_queue *rx_queue; 436874aeea5SJeff Kirsher struct efx_tx_queue *tx_queue; 437874aeea5SJeff Kirsher int j; 438874aeea5SJeff Kirsher 4397f967c01SBen Hutchings channel = kzalloc(sizeof(*channel), GFP_KERNEL); 4407f967c01SBen Hutchings if (!channel) 4417f967c01SBen Hutchings return NULL; 4427f967c01SBen Hutchings 4437f967c01SBen Hutchings channel->efx = efx; 4447f967c01SBen Hutchings channel->channel = i; 4457f967c01SBen Hutchings channel->type = &efx_default_channel_type; 4467f967c01SBen Hutchings 4477f967c01SBen Hutchings for (j = 0; j < EFX_TXQ_TYPES; j++) { 4487f967c01SBen Hutchings tx_queue = &channel->tx_queue[j]; 4497f967c01SBen Hutchings tx_queue->efx = efx; 4507f967c01SBen Hutchings tx_queue->queue = i * EFX_TXQ_TYPES + j; 4517f967c01SBen Hutchings tx_queue->channel = channel; 4527f967c01SBen Hutchings } 4537f967c01SBen Hutchings 4547f967c01SBen Hutchings rx_queue = &channel->rx_queue; 4557f967c01SBen Hutchings rx_queue->efx = efx; 4567f967c01SBen Hutchings setup_timer(&rx_queue->slow_fill, efx_rx_slow_fill, 4577f967c01SBen Hutchings (unsigned long)rx_queue); 4587f967c01SBen Hutchings 4597f967c01SBen Hutchings return channel; 4607f967c01SBen Hutchings } 4617f967c01SBen Hutchings 4627f967c01SBen Hutchings /* Allocate and initialise a channel structure, copying parameters 4637f967c01SBen Hutchings * (but not resources) from an old channel structure. 4647f967c01SBen Hutchings */ 4657f967c01SBen Hutchings static struct efx_channel * 4667f967c01SBen Hutchings efx_copy_channel(const struct efx_channel *old_channel) 4677f967c01SBen Hutchings { 4687f967c01SBen Hutchings struct efx_channel *channel; 4697f967c01SBen Hutchings struct efx_rx_queue *rx_queue; 4707f967c01SBen Hutchings struct efx_tx_queue *tx_queue; 4717f967c01SBen Hutchings int j; 4727f967c01SBen Hutchings 473874aeea5SJeff Kirsher channel = kmalloc(sizeof(*channel), GFP_KERNEL); 474874aeea5SJeff Kirsher if (!channel) 475874aeea5SJeff Kirsher return NULL; 476874aeea5SJeff Kirsher 477874aeea5SJeff Kirsher *channel = *old_channel; 478874aeea5SJeff Kirsher 479874aeea5SJeff Kirsher channel->napi_dev = NULL; 48046d054f8SBert Kenward INIT_HLIST_NODE(&channel->napi_str.napi_hash_node); 48146d054f8SBert Kenward channel->napi_str.napi_id = 0; 48246d054f8SBert Kenward channel->napi_str.state = 0; 483874aeea5SJeff Kirsher memset(&channel->eventq, 0, sizeof(channel->eventq)); 484874aeea5SJeff Kirsher 485874aeea5SJeff Kirsher for (j = 0; j < EFX_TXQ_TYPES; j++) { 486874aeea5SJeff Kirsher tx_queue = &channel->tx_queue[j]; 487874aeea5SJeff Kirsher if (tx_queue->channel) 488874aeea5SJeff Kirsher tx_queue->channel = channel; 489874aeea5SJeff Kirsher tx_queue->buffer = NULL; 490874aeea5SJeff Kirsher memset(&tx_queue->txd, 0, sizeof(tx_queue->txd)); 491874aeea5SJeff Kirsher } 492874aeea5SJeff Kirsher 493874aeea5SJeff Kirsher rx_queue = &channel->rx_queue; 4947f967c01SBen Hutchings rx_queue->buffer = NULL; 4957f967c01SBen Hutchings memset(&rx_queue->rxd, 0, sizeof(rx_queue->rxd)); 496874aeea5SJeff Kirsher setup_timer(&rx_queue->slow_fill, efx_rx_slow_fill, 497874aeea5SJeff Kirsher (unsigned long)rx_queue); 498874aeea5SJeff Kirsher 499874aeea5SJeff Kirsher return channel; 500874aeea5SJeff Kirsher } 501874aeea5SJeff Kirsher 502874aeea5SJeff Kirsher static int efx_probe_channel(struct efx_channel *channel) 503874aeea5SJeff Kirsher { 504874aeea5SJeff Kirsher struct efx_tx_queue *tx_queue; 505874aeea5SJeff Kirsher struct efx_rx_queue *rx_queue; 506874aeea5SJeff Kirsher int rc; 507874aeea5SJeff Kirsher 508874aeea5SJeff Kirsher netif_dbg(channel->efx, probe, channel->efx->net_dev, 509874aeea5SJeff Kirsher "creating channel %d\n", channel->channel); 510874aeea5SJeff Kirsher 5117f967c01SBen Hutchings rc = channel->type->pre_probe(channel); 5127f967c01SBen Hutchings if (rc) 5137f967c01SBen Hutchings goto fail; 5147f967c01SBen Hutchings 515874aeea5SJeff Kirsher rc = efx_probe_eventq(channel); 516874aeea5SJeff Kirsher if (rc) 5177f967c01SBen Hutchings goto fail; 518874aeea5SJeff Kirsher 519874aeea5SJeff Kirsher efx_for_each_channel_tx_queue(tx_queue, channel) { 520874aeea5SJeff Kirsher rc = efx_probe_tx_queue(tx_queue); 521874aeea5SJeff Kirsher if (rc) 5227f967c01SBen Hutchings goto fail; 523874aeea5SJeff Kirsher } 524874aeea5SJeff Kirsher 525874aeea5SJeff Kirsher efx_for_each_channel_rx_queue(rx_queue, channel) { 526874aeea5SJeff Kirsher rc = efx_probe_rx_queue(rx_queue); 527874aeea5SJeff Kirsher if (rc) 5287f967c01SBen Hutchings goto fail; 529874aeea5SJeff Kirsher } 530874aeea5SJeff Kirsher 531874aeea5SJeff Kirsher return 0; 532874aeea5SJeff Kirsher 5337f967c01SBen Hutchings fail: 5347f967c01SBen Hutchings efx_remove_channel(channel); 535874aeea5SJeff Kirsher return rc; 536874aeea5SJeff Kirsher } 537874aeea5SJeff Kirsher 5387f967c01SBen Hutchings static void 5397f967c01SBen Hutchings efx_get_channel_name(struct efx_channel *channel, char *buf, size_t len) 5407f967c01SBen Hutchings { 5417f967c01SBen Hutchings struct efx_nic *efx = channel->efx; 5427f967c01SBen Hutchings const char *type; 5437f967c01SBen Hutchings int number; 5447f967c01SBen Hutchings 5457f967c01SBen Hutchings number = channel->channel; 5467f967c01SBen Hutchings if (efx->tx_channel_offset == 0) { 5477f967c01SBen Hutchings type = ""; 5487f967c01SBen Hutchings } else if (channel->channel < efx->tx_channel_offset) { 5497f967c01SBen Hutchings type = "-rx"; 5507f967c01SBen Hutchings } else { 5517f967c01SBen Hutchings type = "-tx"; 5527f967c01SBen Hutchings number -= efx->tx_channel_offset; 5537f967c01SBen Hutchings } 5547f967c01SBen Hutchings snprintf(buf, len, "%s%s-%d", efx->name, type, number); 5557f967c01SBen Hutchings } 556874aeea5SJeff Kirsher 557874aeea5SJeff Kirsher static void efx_set_channel_names(struct efx_nic *efx) 558874aeea5SJeff Kirsher { 559874aeea5SJeff Kirsher struct efx_channel *channel; 560874aeea5SJeff Kirsher 5617f967c01SBen Hutchings efx_for_each_channel(channel, efx) 5627f967c01SBen Hutchings channel->type->get_name(channel, 563d8291187SBen Hutchings efx->msi_context[channel->channel].name, 564d8291187SBen Hutchings sizeof(efx->msi_context[0].name)); 565874aeea5SJeff Kirsher } 566874aeea5SJeff Kirsher 567874aeea5SJeff Kirsher static int efx_probe_channels(struct efx_nic *efx) 568874aeea5SJeff Kirsher { 569874aeea5SJeff Kirsher struct efx_channel *channel; 570874aeea5SJeff Kirsher int rc; 571874aeea5SJeff Kirsher 572874aeea5SJeff Kirsher /* Restart special buffer allocation */ 573874aeea5SJeff Kirsher efx->next_buffer_table = 0; 574874aeea5SJeff Kirsher 575c92aaff1SBen Hutchings /* Probe channels in reverse, so that any 'extra' channels 576c92aaff1SBen Hutchings * use the start of the buffer table. This allows the traffic 577c92aaff1SBen Hutchings * channels to be resized without moving them or wasting the 578c92aaff1SBen Hutchings * entries before them. 579c92aaff1SBen Hutchings */ 580c92aaff1SBen Hutchings efx_for_each_channel_rev(channel, efx) { 581874aeea5SJeff Kirsher rc = efx_probe_channel(channel); 582874aeea5SJeff Kirsher if (rc) { 583874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 584874aeea5SJeff Kirsher "failed to create channel %d\n", 585874aeea5SJeff Kirsher channel->channel); 586874aeea5SJeff Kirsher goto fail; 587874aeea5SJeff Kirsher } 588874aeea5SJeff Kirsher } 589874aeea5SJeff Kirsher efx_set_channel_names(efx); 590874aeea5SJeff Kirsher 591874aeea5SJeff Kirsher return 0; 592874aeea5SJeff Kirsher 593874aeea5SJeff Kirsher fail: 594874aeea5SJeff Kirsher efx_remove_channels(efx); 595874aeea5SJeff Kirsher return rc; 596874aeea5SJeff Kirsher } 597874aeea5SJeff Kirsher 598874aeea5SJeff Kirsher /* Channels are shutdown and reinitialised whilst the NIC is running 599874aeea5SJeff Kirsher * to propagate configuration changes (mtu, checksum offload), or 600874aeea5SJeff Kirsher * to clear hardware error conditions 601874aeea5SJeff Kirsher */ 6029f2cb71cSBen Hutchings static void efx_start_datapath(struct efx_nic *efx) 603874aeea5SJeff Kirsher { 604ebfcd0fdSAndrew Rybchenko netdev_features_t old_features = efx->net_dev->features; 60585740cdfSBen Hutchings bool old_rx_scatter = efx->rx_scatter; 606874aeea5SJeff Kirsher struct efx_tx_queue *tx_queue; 607874aeea5SJeff Kirsher struct efx_rx_queue *rx_queue; 608874aeea5SJeff Kirsher struct efx_channel *channel; 60985740cdfSBen Hutchings size_t rx_buf_len; 610874aeea5SJeff Kirsher 611874aeea5SJeff Kirsher /* Calculate the rx buffer allocation parameters required to 612874aeea5SJeff Kirsher * support the current MTU, including padding for header 613874aeea5SJeff Kirsher * alignment and overruns. 614874aeea5SJeff Kirsher */ 61543a3739dSJon Cooper efx->rx_dma_len = (efx->rx_prefix_size + 616874aeea5SJeff Kirsher EFX_MAX_FRAME_LEN(efx->net_dev->mtu) + 617874aeea5SJeff Kirsher efx->type->rx_buffer_padding); 61885740cdfSBen Hutchings rx_buf_len = (sizeof(struct efx_rx_page_state) + 6192ec03014SAndrew Rybchenko efx->rx_ip_align + efx->rx_dma_len); 62085740cdfSBen Hutchings if (rx_buf_len <= PAGE_SIZE) { 621e8c68c0aSJon Cooper efx->rx_scatter = efx->type->always_rx_scatter; 62285740cdfSBen Hutchings efx->rx_buffer_order = 0; 62385740cdfSBen Hutchings } else if (efx->type->can_rx_scatter) { 624950c54dfSBen Hutchings BUILD_BUG_ON(EFX_RX_USR_BUF_SIZE % L1_CACHE_BYTES); 62585740cdfSBen Hutchings BUILD_BUG_ON(sizeof(struct efx_rx_page_state) + 626950c54dfSBen Hutchings 2 * ALIGN(NET_IP_ALIGN + EFX_RX_USR_BUF_SIZE, 627950c54dfSBen Hutchings EFX_RX_BUF_ALIGNMENT) > 628950c54dfSBen Hutchings PAGE_SIZE); 62985740cdfSBen Hutchings efx->rx_scatter = true; 63085740cdfSBen Hutchings efx->rx_dma_len = EFX_RX_USR_BUF_SIZE; 63185740cdfSBen Hutchings efx->rx_buffer_order = 0; 63285740cdfSBen Hutchings } else { 63385740cdfSBen Hutchings efx->rx_scatter = false; 63485740cdfSBen Hutchings efx->rx_buffer_order = get_order(rx_buf_len); 63585740cdfSBen Hutchings } 63685740cdfSBen Hutchings 6371648a23fSDaniel Pieczko efx_rx_config_page_split(efx); 6381648a23fSDaniel Pieczko if (efx->rx_buffer_order) 6391648a23fSDaniel Pieczko netif_dbg(efx, drv, efx->net_dev, 6401648a23fSDaniel Pieczko "RX buf len=%u; page order=%u batch=%u\n", 6411648a23fSDaniel Pieczko efx->rx_dma_len, efx->rx_buffer_order, 6421648a23fSDaniel Pieczko efx->rx_pages_per_batch); 6431648a23fSDaniel Pieczko else 6441648a23fSDaniel Pieczko netif_dbg(efx, drv, efx->net_dev, 6451648a23fSDaniel Pieczko "RX buf len=%u step=%u bpp=%u; page batch=%u\n", 6461648a23fSDaniel Pieczko efx->rx_dma_len, efx->rx_page_buf_step, 6471648a23fSDaniel Pieczko efx->rx_bufs_per_page, efx->rx_pages_per_batch); 6482768935aSDaniel Pieczko 649ebfcd0fdSAndrew Rybchenko /* Restore previously fixed features in hw_features and remove 650ebfcd0fdSAndrew Rybchenko * features which are fixed now 651ebfcd0fdSAndrew Rybchenko */ 652ebfcd0fdSAndrew Rybchenko efx->net_dev->hw_features |= efx->net_dev->features; 653ebfcd0fdSAndrew Rybchenko efx->net_dev->hw_features &= ~efx->fixed_features; 654ebfcd0fdSAndrew Rybchenko efx->net_dev->features |= efx->fixed_features; 655ebfcd0fdSAndrew Rybchenko if (efx->net_dev->features != old_features) 656ebfcd0fdSAndrew Rybchenko netdev_features_change(efx->net_dev); 657ebfcd0fdSAndrew Rybchenko 658e8c68c0aSJon Cooper /* RX filters may also have scatter-enabled flags */ 65985740cdfSBen Hutchings if (efx->rx_scatter != old_rx_scatter) 660add72477SBen Hutchings efx->type->filter_update_rx_scatter(efx); 661874aeea5SJeff Kirsher 66214bf718fSBen Hutchings /* We must keep at least one descriptor in a TX ring empty. 66314bf718fSBen Hutchings * We could avoid this when the queue size does not exactly 66414bf718fSBen Hutchings * match the hardware ring size, but it's not that important. 66514bf718fSBen Hutchings * Therefore we stop the queue when one more skb might fill 66614bf718fSBen Hutchings * the ring completely. We wake it when half way back to 66714bf718fSBen Hutchings * empty. 66814bf718fSBen Hutchings */ 66914bf718fSBen Hutchings efx->txq_stop_thresh = efx->txq_entries - efx_tx_max_skb_descs(efx); 67014bf718fSBen Hutchings efx->txq_wake_thresh = efx->txq_stop_thresh / 2; 67114bf718fSBen Hutchings 672874aeea5SJeff Kirsher /* Initialise the channels */ 673874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) { 6743881d8abSAlexandre Rames efx_for_each_channel_tx_queue(tx_queue, channel) { 675874aeea5SJeff Kirsher efx_init_tx_queue(tx_queue); 6763881d8abSAlexandre Rames atomic_inc(&efx->active_queues); 6773881d8abSAlexandre Rames } 678874aeea5SJeff Kirsher 6799f2cb71cSBen Hutchings efx_for_each_channel_rx_queue(rx_queue, channel) { 680874aeea5SJeff Kirsher efx_init_rx_queue(rx_queue); 6813881d8abSAlexandre Rames atomic_inc(&efx->active_queues); 682cce28794SJon Cooper efx_stop_eventq(channel); 683cce28794SJon Cooper efx_fast_push_rx_descriptors(rx_queue, false); 684cce28794SJon Cooper efx_start_eventq(channel); 6859f2cb71cSBen Hutchings } 686874aeea5SJeff Kirsher 68785740cdfSBen Hutchings WARN_ON(channel->rx_pkt_n_frags); 688874aeea5SJeff Kirsher } 6899f2cb71cSBen Hutchings 6902ea4dc28SAlexandre Rames efx_ptp_start_datapath(efx); 6912ea4dc28SAlexandre Rames 6929f2cb71cSBen Hutchings if (netif_device_present(efx->net_dev)) 6939f2cb71cSBen Hutchings netif_tx_wake_all_queues(efx->net_dev); 694874aeea5SJeff Kirsher } 695874aeea5SJeff Kirsher 6969f2cb71cSBen Hutchings static void efx_stop_datapath(struct efx_nic *efx) 697874aeea5SJeff Kirsher { 698874aeea5SJeff Kirsher struct efx_channel *channel; 699874aeea5SJeff Kirsher struct efx_tx_queue *tx_queue; 700874aeea5SJeff Kirsher struct efx_rx_queue *rx_queue; 701874aeea5SJeff Kirsher int rc; 702874aeea5SJeff Kirsher 703874aeea5SJeff Kirsher EFX_ASSERT_RESET_SERIALISED(efx); 704874aeea5SJeff Kirsher BUG_ON(efx->port_enabled); 705874aeea5SJeff Kirsher 7062ea4dc28SAlexandre Rames efx_ptp_stop_datapath(efx); 7072ea4dc28SAlexandre Rames 708d8aec745SBen Hutchings /* Stop RX refill */ 709d8aec745SBen Hutchings efx_for_each_channel(channel, efx) { 710d8aec745SBen Hutchings efx_for_each_channel_rx_queue(rx_queue, channel) 711d8aec745SBen Hutchings rx_queue->refill_enabled = false; 712d8aec745SBen Hutchings } 713d8aec745SBen Hutchings 714874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) { 7159f2cb71cSBen Hutchings /* RX packet processing is pipelined, so wait for the 7169f2cb71cSBen Hutchings * NAPI handler to complete. At least event queue 0 7179f2cb71cSBen Hutchings * might be kept active by non-data events, so don't 7189f2cb71cSBen Hutchings * use napi_synchronize() but actually disable NAPI 7199f2cb71cSBen Hutchings * temporarily. 7209f2cb71cSBen Hutchings */ 7219f2cb71cSBen Hutchings if (efx_channel_has_rx_queue(channel)) { 7229f2cb71cSBen Hutchings efx_stop_eventq(channel); 7239f2cb71cSBen Hutchings efx_start_eventq(channel); 7249f2cb71cSBen Hutchings } 725e42c3d85SBen Hutchings } 726874aeea5SJeff Kirsher 727e42c3d85SBen Hutchings rc = efx->type->fini_dmaq(efx); 7285a6681e2SEdward Cree if (rc) { 729e42c3d85SBen Hutchings netif_err(efx, drv, efx->net_dev, "failed to flush queues\n"); 730e42c3d85SBen Hutchings } else { 731e42c3d85SBen Hutchings netif_dbg(efx, drv, efx->net_dev, 732e42c3d85SBen Hutchings "successfully flushed all queues\n"); 733e42c3d85SBen Hutchings } 734e42c3d85SBen Hutchings 735e42c3d85SBen Hutchings efx_for_each_channel(channel, efx) { 736874aeea5SJeff Kirsher efx_for_each_channel_rx_queue(rx_queue, channel) 737874aeea5SJeff Kirsher efx_fini_rx_queue(rx_queue); 738874aeea5SJeff Kirsher efx_for_each_possible_channel_tx_queue(tx_queue, channel) 739874aeea5SJeff Kirsher efx_fini_tx_queue(tx_queue); 740874aeea5SJeff Kirsher } 741874aeea5SJeff Kirsher } 742874aeea5SJeff Kirsher 743874aeea5SJeff Kirsher static void efx_remove_channel(struct efx_channel *channel) 744874aeea5SJeff Kirsher { 745874aeea5SJeff Kirsher struct efx_tx_queue *tx_queue; 746874aeea5SJeff Kirsher struct efx_rx_queue *rx_queue; 747874aeea5SJeff Kirsher 748874aeea5SJeff Kirsher netif_dbg(channel->efx, drv, channel->efx->net_dev, 749874aeea5SJeff Kirsher "destroy chan %d\n", channel->channel); 750874aeea5SJeff Kirsher 751874aeea5SJeff Kirsher efx_for_each_channel_rx_queue(rx_queue, channel) 752874aeea5SJeff Kirsher efx_remove_rx_queue(rx_queue); 753874aeea5SJeff Kirsher efx_for_each_possible_channel_tx_queue(tx_queue, channel) 754874aeea5SJeff Kirsher efx_remove_tx_queue(tx_queue); 755874aeea5SJeff Kirsher efx_remove_eventq(channel); 756c31e5f9fSStuart Hodgson channel->type->post_remove(channel); 757874aeea5SJeff Kirsher } 758874aeea5SJeff Kirsher 759874aeea5SJeff Kirsher static void efx_remove_channels(struct efx_nic *efx) 760874aeea5SJeff Kirsher { 761874aeea5SJeff Kirsher struct efx_channel *channel; 762874aeea5SJeff Kirsher 763874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) 764874aeea5SJeff Kirsher efx_remove_channel(channel); 765874aeea5SJeff Kirsher } 766874aeea5SJeff Kirsher 767874aeea5SJeff Kirsher int 768874aeea5SJeff Kirsher efx_realloc_channels(struct efx_nic *efx, u32 rxq_entries, u32 txq_entries) 769874aeea5SJeff Kirsher { 770874aeea5SJeff Kirsher struct efx_channel *other_channel[EFX_MAX_CHANNELS], *channel; 771874aeea5SJeff Kirsher u32 old_rxq_entries, old_txq_entries; 7727f967c01SBen Hutchings unsigned i, next_buffer_table = 0; 773261e4d96SJon Cooper int rc, rc2; 7748b7325b4SBen Hutchings 7758b7325b4SBen Hutchings rc = efx_check_disabled(efx); 7768b7325b4SBen Hutchings if (rc) 7778b7325b4SBen Hutchings return rc; 7787f967c01SBen Hutchings 7797f967c01SBen Hutchings /* Not all channels should be reallocated. We must avoid 7807f967c01SBen Hutchings * reallocating their buffer table entries. 7817f967c01SBen Hutchings */ 7827f967c01SBen Hutchings efx_for_each_channel(channel, efx) { 7837f967c01SBen Hutchings struct efx_rx_queue *rx_queue; 7847f967c01SBen Hutchings struct efx_tx_queue *tx_queue; 7857f967c01SBen Hutchings 7867f967c01SBen Hutchings if (channel->type->copy) 7877f967c01SBen Hutchings continue; 7887f967c01SBen Hutchings next_buffer_table = max(next_buffer_table, 7897f967c01SBen Hutchings channel->eventq.index + 7907f967c01SBen Hutchings channel->eventq.entries); 7917f967c01SBen Hutchings efx_for_each_channel_rx_queue(rx_queue, channel) 7927f967c01SBen Hutchings next_buffer_table = max(next_buffer_table, 7937f967c01SBen Hutchings rx_queue->rxd.index + 7947f967c01SBen Hutchings rx_queue->rxd.entries); 7957f967c01SBen Hutchings efx_for_each_channel_tx_queue(tx_queue, channel) 7967f967c01SBen Hutchings next_buffer_table = max(next_buffer_table, 7977f967c01SBen Hutchings tx_queue->txd.index + 7987f967c01SBen Hutchings tx_queue->txd.entries); 7997f967c01SBen Hutchings } 800874aeea5SJeff Kirsher 80129c69a48SBen Hutchings efx_device_detach_sync(efx); 802874aeea5SJeff Kirsher efx_stop_all(efx); 803d8291187SBen Hutchings efx_soft_disable_interrupts(efx); 804874aeea5SJeff Kirsher 8057f967c01SBen Hutchings /* Clone channels (where possible) */ 806874aeea5SJeff Kirsher memset(other_channel, 0, sizeof(other_channel)); 807874aeea5SJeff Kirsher for (i = 0; i < efx->n_channels; i++) { 8087f967c01SBen Hutchings channel = efx->channel[i]; 8097f967c01SBen Hutchings if (channel->type->copy) 8107f967c01SBen Hutchings channel = channel->type->copy(channel); 811874aeea5SJeff Kirsher if (!channel) { 812874aeea5SJeff Kirsher rc = -ENOMEM; 813874aeea5SJeff Kirsher goto out; 814874aeea5SJeff Kirsher } 815874aeea5SJeff Kirsher other_channel[i] = channel; 816874aeea5SJeff Kirsher } 817874aeea5SJeff Kirsher 818874aeea5SJeff Kirsher /* Swap entry counts and channel pointers */ 819874aeea5SJeff Kirsher old_rxq_entries = efx->rxq_entries; 820874aeea5SJeff Kirsher old_txq_entries = efx->txq_entries; 821874aeea5SJeff Kirsher efx->rxq_entries = rxq_entries; 822874aeea5SJeff Kirsher efx->txq_entries = txq_entries; 823874aeea5SJeff Kirsher for (i = 0; i < efx->n_channels; i++) { 824874aeea5SJeff Kirsher channel = efx->channel[i]; 825874aeea5SJeff Kirsher efx->channel[i] = other_channel[i]; 826874aeea5SJeff Kirsher other_channel[i] = channel; 827874aeea5SJeff Kirsher } 828874aeea5SJeff Kirsher 8297f967c01SBen Hutchings /* Restart buffer table allocation */ 8307f967c01SBen Hutchings efx->next_buffer_table = next_buffer_table; 8317f967c01SBen Hutchings 8327f967c01SBen Hutchings for (i = 0; i < efx->n_channels; i++) { 8337f967c01SBen Hutchings channel = efx->channel[i]; 8347f967c01SBen Hutchings if (!channel->type->copy) 8357f967c01SBen Hutchings continue; 8367f967c01SBen Hutchings rc = efx_probe_channel(channel); 837874aeea5SJeff Kirsher if (rc) 838874aeea5SJeff Kirsher goto rollback; 8397f967c01SBen Hutchings efx_init_napi_channel(efx->channel[i]); 840874aeea5SJeff Kirsher } 841874aeea5SJeff Kirsher 8427f967c01SBen Hutchings out: 8437f967c01SBen Hutchings /* Destroy unused channel structures */ 8447f967c01SBen Hutchings for (i = 0; i < efx->n_channels; i++) { 8457f967c01SBen Hutchings channel = other_channel[i]; 8467f967c01SBen Hutchings if (channel && channel->type->copy) { 8477f967c01SBen Hutchings efx_fini_napi_channel(channel); 8487f967c01SBen Hutchings efx_remove_channel(channel); 8497f967c01SBen Hutchings kfree(channel); 8507f967c01SBen Hutchings } 8517f967c01SBen Hutchings } 8527f967c01SBen Hutchings 853261e4d96SJon Cooper rc2 = efx_soft_enable_interrupts(efx); 854261e4d96SJon Cooper if (rc2) { 855261e4d96SJon Cooper rc = rc ? rc : rc2; 856261e4d96SJon Cooper netif_err(efx, drv, efx->net_dev, 857261e4d96SJon Cooper "unable to restart interrupts on channel reallocation\n"); 858261e4d96SJon Cooper efx_schedule_reset(efx, RESET_TYPE_DISABLE); 859261e4d96SJon Cooper } else { 860874aeea5SJeff Kirsher efx_start_all(efx); 86129c69a48SBen Hutchings netif_device_attach(efx->net_dev); 862261e4d96SJon Cooper } 863874aeea5SJeff Kirsher return rc; 864874aeea5SJeff Kirsher 865874aeea5SJeff Kirsher rollback: 866874aeea5SJeff Kirsher /* Swap back */ 867874aeea5SJeff Kirsher efx->rxq_entries = old_rxq_entries; 868874aeea5SJeff Kirsher efx->txq_entries = old_txq_entries; 869874aeea5SJeff Kirsher for (i = 0; i < efx->n_channels; i++) { 870874aeea5SJeff Kirsher channel = efx->channel[i]; 871874aeea5SJeff Kirsher efx->channel[i] = other_channel[i]; 872874aeea5SJeff Kirsher other_channel[i] = channel; 873874aeea5SJeff Kirsher } 874874aeea5SJeff Kirsher goto out; 875874aeea5SJeff Kirsher } 876874aeea5SJeff Kirsher 877874aeea5SJeff Kirsher void efx_schedule_slow_fill(struct efx_rx_queue *rx_queue) 878874aeea5SJeff Kirsher { 879874aeea5SJeff Kirsher mod_timer(&rx_queue->slow_fill, jiffies + msecs_to_jiffies(100)); 880874aeea5SJeff Kirsher } 881874aeea5SJeff Kirsher 8827f967c01SBen Hutchings static const struct efx_channel_type efx_default_channel_type = { 8837f967c01SBen Hutchings .pre_probe = efx_channel_dummy_op_int, 884c31e5f9fSStuart Hodgson .post_remove = efx_channel_dummy_op_void, 8857f967c01SBen Hutchings .get_name = efx_get_channel_name, 8867f967c01SBen Hutchings .copy = efx_copy_channel, 8877f967c01SBen Hutchings .keep_eventq = false, 8887f967c01SBen Hutchings }; 8897f967c01SBen Hutchings 8907f967c01SBen Hutchings int efx_channel_dummy_op_int(struct efx_channel *channel) 8917f967c01SBen Hutchings { 8927f967c01SBen Hutchings return 0; 8937f967c01SBen Hutchings } 8947f967c01SBen Hutchings 895c31e5f9fSStuart Hodgson void efx_channel_dummy_op_void(struct efx_channel *channel) 896c31e5f9fSStuart Hodgson { 897c31e5f9fSStuart Hodgson } 898c31e5f9fSStuart Hodgson 899874aeea5SJeff Kirsher /************************************************************************** 900874aeea5SJeff Kirsher * 901874aeea5SJeff Kirsher * Port handling 902874aeea5SJeff Kirsher * 903874aeea5SJeff Kirsher **************************************************************************/ 904874aeea5SJeff Kirsher 905874aeea5SJeff Kirsher /* This ensures that the kernel is kept informed (via 906874aeea5SJeff Kirsher * netif_carrier_on/off) of the link status, and also maintains the 907874aeea5SJeff Kirsher * link status's stop on the port's TX queue. 908874aeea5SJeff Kirsher */ 909874aeea5SJeff Kirsher void efx_link_status_changed(struct efx_nic *efx) 910874aeea5SJeff Kirsher { 911874aeea5SJeff Kirsher struct efx_link_state *link_state = &efx->link_state; 912874aeea5SJeff Kirsher 913874aeea5SJeff Kirsher /* SFC Bug 5356: A net_dev notifier is registered, so we must ensure 914874aeea5SJeff Kirsher * that no events are triggered between unregister_netdev() and the 915874aeea5SJeff Kirsher * driver unloading. A more general condition is that NETDEV_CHANGE 916874aeea5SJeff Kirsher * can only be generated between NETDEV_UP and NETDEV_DOWN */ 917874aeea5SJeff Kirsher if (!netif_running(efx->net_dev)) 918874aeea5SJeff Kirsher return; 919874aeea5SJeff Kirsher 920874aeea5SJeff Kirsher if (link_state->up != netif_carrier_ok(efx->net_dev)) { 921874aeea5SJeff Kirsher efx->n_link_state_changes++; 922874aeea5SJeff Kirsher 923874aeea5SJeff Kirsher if (link_state->up) 924874aeea5SJeff Kirsher netif_carrier_on(efx->net_dev); 925874aeea5SJeff Kirsher else 926874aeea5SJeff Kirsher netif_carrier_off(efx->net_dev); 927874aeea5SJeff Kirsher } 928874aeea5SJeff Kirsher 929874aeea5SJeff Kirsher /* Status message for kernel log */ 9302aa9ef11SBen Hutchings if (link_state->up) 931874aeea5SJeff Kirsher netif_info(efx, link, efx->net_dev, 932964e6135SBen Hutchings "link up at %uMbps %s-duplex (MTU %d)\n", 933874aeea5SJeff Kirsher link_state->speed, link_state->fd ? "full" : "half", 934964e6135SBen Hutchings efx->net_dev->mtu); 9352aa9ef11SBen Hutchings else 936874aeea5SJeff Kirsher netif_info(efx, link, efx->net_dev, "link down\n"); 937874aeea5SJeff Kirsher } 938874aeea5SJeff Kirsher 939874aeea5SJeff Kirsher void efx_link_set_advertising(struct efx_nic *efx, u32 advertising) 940874aeea5SJeff Kirsher { 941874aeea5SJeff Kirsher efx->link_advertising = advertising; 942874aeea5SJeff Kirsher if (advertising) { 943874aeea5SJeff Kirsher if (advertising & ADVERTISED_Pause) 944874aeea5SJeff Kirsher efx->wanted_fc |= (EFX_FC_TX | EFX_FC_RX); 945874aeea5SJeff Kirsher else 946874aeea5SJeff Kirsher efx->wanted_fc &= ~(EFX_FC_TX | EFX_FC_RX); 947874aeea5SJeff Kirsher if (advertising & ADVERTISED_Asym_Pause) 948874aeea5SJeff Kirsher efx->wanted_fc ^= EFX_FC_TX; 949874aeea5SJeff Kirsher } 950874aeea5SJeff Kirsher } 951874aeea5SJeff Kirsher 952874aeea5SJeff Kirsher void efx_link_set_wanted_fc(struct efx_nic *efx, u8 wanted_fc) 953874aeea5SJeff Kirsher { 954874aeea5SJeff Kirsher efx->wanted_fc = wanted_fc; 955874aeea5SJeff Kirsher if (efx->link_advertising) { 956874aeea5SJeff Kirsher if (wanted_fc & EFX_FC_RX) 957874aeea5SJeff Kirsher efx->link_advertising |= (ADVERTISED_Pause | 958874aeea5SJeff Kirsher ADVERTISED_Asym_Pause); 959874aeea5SJeff Kirsher else 960874aeea5SJeff Kirsher efx->link_advertising &= ~(ADVERTISED_Pause | 961874aeea5SJeff Kirsher ADVERTISED_Asym_Pause); 962874aeea5SJeff Kirsher if (wanted_fc & EFX_FC_TX) 963874aeea5SJeff Kirsher efx->link_advertising ^= ADVERTISED_Asym_Pause; 964874aeea5SJeff Kirsher } 965874aeea5SJeff Kirsher } 966874aeea5SJeff Kirsher 967874aeea5SJeff Kirsher static void efx_fini_port(struct efx_nic *efx); 968874aeea5SJeff Kirsher 9690d322413SEdward Cree /* We assume that efx->type->reconfigure_mac will always try to sync RX 9700d322413SEdward Cree * filters and therefore needs to read-lock the filter table against freeing 9710d322413SEdward Cree */ 9720d322413SEdward Cree void efx_mac_reconfigure(struct efx_nic *efx) 9730d322413SEdward Cree { 9740d322413SEdward Cree down_read(&efx->filter_sem); 9750d322413SEdward Cree efx->type->reconfigure_mac(efx); 9760d322413SEdward Cree up_read(&efx->filter_sem); 9770d322413SEdward Cree } 9780d322413SEdward Cree 979874aeea5SJeff Kirsher /* Push loopback/power/transmit disable settings to the PHY, and reconfigure 980874aeea5SJeff Kirsher * the MAC appropriately. All other PHY configuration changes are pushed 981874aeea5SJeff Kirsher * through phy_op->set_settings(), and pushed asynchronously to the MAC 982874aeea5SJeff Kirsher * through efx_monitor(). 983874aeea5SJeff Kirsher * 984874aeea5SJeff Kirsher * Callers must hold the mac_lock 985874aeea5SJeff Kirsher */ 986874aeea5SJeff Kirsher int __efx_reconfigure_port(struct efx_nic *efx) 987874aeea5SJeff Kirsher { 988874aeea5SJeff Kirsher enum efx_phy_mode phy_mode; 989874aeea5SJeff Kirsher int rc; 990874aeea5SJeff Kirsher 991874aeea5SJeff Kirsher WARN_ON(!mutex_is_locked(&efx->mac_lock)); 992874aeea5SJeff Kirsher 993874aeea5SJeff Kirsher /* Disable PHY transmit in mac level loopbacks */ 994874aeea5SJeff Kirsher phy_mode = efx->phy_mode; 995874aeea5SJeff Kirsher if (LOOPBACK_INTERNAL(efx)) 996874aeea5SJeff Kirsher efx->phy_mode |= PHY_MODE_TX_DISABLED; 997874aeea5SJeff Kirsher else 998874aeea5SJeff Kirsher efx->phy_mode &= ~PHY_MODE_TX_DISABLED; 999874aeea5SJeff Kirsher 1000874aeea5SJeff Kirsher rc = efx->type->reconfigure_port(efx); 1001874aeea5SJeff Kirsher 1002874aeea5SJeff Kirsher if (rc) 1003874aeea5SJeff Kirsher efx->phy_mode = phy_mode; 1004874aeea5SJeff Kirsher 1005874aeea5SJeff Kirsher return rc; 1006874aeea5SJeff Kirsher } 1007874aeea5SJeff Kirsher 1008874aeea5SJeff Kirsher /* Reinitialise the MAC to pick up new PHY settings, even if the port is 1009874aeea5SJeff Kirsher * disabled. */ 1010874aeea5SJeff Kirsher int efx_reconfigure_port(struct efx_nic *efx) 1011874aeea5SJeff Kirsher { 1012874aeea5SJeff Kirsher int rc; 1013874aeea5SJeff Kirsher 1014874aeea5SJeff Kirsher EFX_ASSERT_RESET_SERIALISED(efx); 1015874aeea5SJeff Kirsher 1016874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 1017874aeea5SJeff Kirsher rc = __efx_reconfigure_port(efx); 1018874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 1019874aeea5SJeff Kirsher 1020874aeea5SJeff Kirsher return rc; 1021874aeea5SJeff Kirsher } 1022874aeea5SJeff Kirsher 1023874aeea5SJeff Kirsher /* Asynchronous work item for changing MAC promiscuity and multicast 1024874aeea5SJeff Kirsher * hash. Avoid a drain/rx_ingress enable by reconfiguring the current 1025874aeea5SJeff Kirsher * MAC directly. */ 1026874aeea5SJeff Kirsher static void efx_mac_work(struct work_struct *data) 1027874aeea5SJeff Kirsher { 1028874aeea5SJeff Kirsher struct efx_nic *efx = container_of(data, struct efx_nic, mac_work); 1029874aeea5SJeff Kirsher 1030874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 103130b81cdaSBen Hutchings if (efx->port_enabled) 10320d322413SEdward Cree efx_mac_reconfigure(efx); 1033874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 1034874aeea5SJeff Kirsher } 1035874aeea5SJeff Kirsher 1036874aeea5SJeff Kirsher static int efx_probe_port(struct efx_nic *efx) 1037874aeea5SJeff Kirsher { 1038874aeea5SJeff Kirsher int rc; 1039874aeea5SJeff Kirsher 1040874aeea5SJeff Kirsher netif_dbg(efx, probe, efx->net_dev, "create port\n"); 1041874aeea5SJeff Kirsher 1042874aeea5SJeff Kirsher if (phy_flash_cfg) 1043874aeea5SJeff Kirsher efx->phy_mode = PHY_MODE_SPECIAL; 1044874aeea5SJeff Kirsher 1045874aeea5SJeff Kirsher /* Connect up MAC/PHY operations table */ 1046874aeea5SJeff Kirsher rc = efx->type->probe_port(efx); 1047874aeea5SJeff Kirsher if (rc) 1048874aeea5SJeff Kirsher return rc; 1049874aeea5SJeff Kirsher 1050e332bcb3SBen Hutchings /* Initialise MAC address to permanent address */ 1051cd84ff4dSEdward Cree ether_addr_copy(efx->net_dev->dev_addr, efx->net_dev->perm_addr); 1052874aeea5SJeff Kirsher 1053874aeea5SJeff Kirsher return 0; 1054874aeea5SJeff Kirsher } 1055874aeea5SJeff Kirsher 1056874aeea5SJeff Kirsher static int efx_init_port(struct efx_nic *efx) 1057874aeea5SJeff Kirsher { 1058874aeea5SJeff Kirsher int rc; 1059874aeea5SJeff Kirsher 1060874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "init port\n"); 1061874aeea5SJeff Kirsher 1062874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 1063874aeea5SJeff Kirsher 1064874aeea5SJeff Kirsher rc = efx->phy_op->init(efx); 1065874aeea5SJeff Kirsher if (rc) 1066874aeea5SJeff Kirsher goto fail1; 1067874aeea5SJeff Kirsher 1068874aeea5SJeff Kirsher efx->port_initialized = true; 1069874aeea5SJeff Kirsher 1070874aeea5SJeff Kirsher /* Reconfigure the MAC before creating dma queues (required for 1071874aeea5SJeff Kirsher * Falcon/A1 where RX_INGR_EN/TX_DRAIN_EN isn't supported) */ 10720d322413SEdward Cree efx_mac_reconfigure(efx); 1073874aeea5SJeff Kirsher 1074874aeea5SJeff Kirsher /* Ensure the PHY advertises the correct flow control settings */ 1075874aeea5SJeff Kirsher rc = efx->phy_op->reconfigure(efx); 1076267d9d73SEdward Cree if (rc && rc != -EPERM) 1077874aeea5SJeff Kirsher goto fail2; 1078874aeea5SJeff Kirsher 1079874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 1080874aeea5SJeff Kirsher return 0; 1081874aeea5SJeff Kirsher 1082874aeea5SJeff Kirsher fail2: 1083874aeea5SJeff Kirsher efx->phy_op->fini(efx); 1084874aeea5SJeff Kirsher fail1: 1085874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 1086874aeea5SJeff Kirsher return rc; 1087874aeea5SJeff Kirsher } 1088874aeea5SJeff Kirsher 1089874aeea5SJeff Kirsher static void efx_start_port(struct efx_nic *efx) 1090874aeea5SJeff Kirsher { 1091874aeea5SJeff Kirsher netif_dbg(efx, ifup, efx->net_dev, "start port\n"); 1092874aeea5SJeff Kirsher BUG_ON(efx->port_enabled); 1093874aeea5SJeff Kirsher 1094874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 1095874aeea5SJeff Kirsher efx->port_enabled = true; 1096874aeea5SJeff Kirsher 1097d615c039SBen Hutchings /* Ensure MAC ingress/egress is enabled */ 10980d322413SEdward Cree efx_mac_reconfigure(efx); 1099874aeea5SJeff Kirsher 1100874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 1101874aeea5SJeff Kirsher } 1102874aeea5SJeff Kirsher 1103d615c039SBen Hutchings /* Cancel work for MAC reconfiguration, periodic hardware monitoring 1104d615c039SBen Hutchings * and the async self-test, wait for them to finish and prevent them 1105d615c039SBen Hutchings * being scheduled again. This doesn't cover online resets, which 1106d615c039SBen Hutchings * should only be cancelled when removing the device. 1107d615c039SBen Hutchings */ 1108874aeea5SJeff Kirsher static void efx_stop_port(struct efx_nic *efx) 1109874aeea5SJeff Kirsher { 1110874aeea5SJeff Kirsher netif_dbg(efx, ifdown, efx->net_dev, "stop port\n"); 1111874aeea5SJeff Kirsher 1112d615c039SBen Hutchings EFX_ASSERT_RESET_SERIALISED(efx); 1113d615c039SBen Hutchings 1114874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 1115874aeea5SJeff Kirsher efx->port_enabled = false; 1116874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 1117874aeea5SJeff Kirsher 1118874aeea5SJeff Kirsher /* Serialise against efx_set_multicast_list() */ 1119874aeea5SJeff Kirsher netif_addr_lock_bh(efx->net_dev); 1120874aeea5SJeff Kirsher netif_addr_unlock_bh(efx->net_dev); 1121d615c039SBen Hutchings 1122d615c039SBen Hutchings cancel_delayed_work_sync(&efx->monitor_work); 1123d615c039SBen Hutchings efx_selftest_async_cancel(efx); 1124d615c039SBen Hutchings cancel_work_sync(&efx->mac_work); 1125874aeea5SJeff Kirsher } 1126874aeea5SJeff Kirsher 1127874aeea5SJeff Kirsher static void efx_fini_port(struct efx_nic *efx) 1128874aeea5SJeff Kirsher { 1129874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "shut down port\n"); 1130874aeea5SJeff Kirsher 1131874aeea5SJeff Kirsher if (!efx->port_initialized) 1132874aeea5SJeff Kirsher return; 1133874aeea5SJeff Kirsher 1134874aeea5SJeff Kirsher efx->phy_op->fini(efx); 1135874aeea5SJeff Kirsher efx->port_initialized = false; 1136874aeea5SJeff Kirsher 1137874aeea5SJeff Kirsher efx->link_state.up = false; 1138874aeea5SJeff Kirsher efx_link_status_changed(efx); 1139874aeea5SJeff Kirsher } 1140874aeea5SJeff Kirsher 1141874aeea5SJeff Kirsher static void efx_remove_port(struct efx_nic *efx) 1142874aeea5SJeff Kirsher { 1143874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "destroying port\n"); 1144874aeea5SJeff Kirsher 1145874aeea5SJeff Kirsher efx->type->remove_port(efx); 1146874aeea5SJeff Kirsher } 1147874aeea5SJeff Kirsher 1148874aeea5SJeff Kirsher /************************************************************************** 1149874aeea5SJeff Kirsher * 1150874aeea5SJeff Kirsher * NIC handling 1151874aeea5SJeff Kirsher * 1152874aeea5SJeff Kirsher **************************************************************************/ 1153874aeea5SJeff Kirsher 11540bcf4a64SBen Hutchings static LIST_HEAD(efx_primary_list); 11550bcf4a64SBen Hutchings static LIST_HEAD(efx_unassociated_list); 11560bcf4a64SBen Hutchings 11570bcf4a64SBen Hutchings static bool efx_same_controller(struct efx_nic *left, struct efx_nic *right) 11580bcf4a64SBen Hutchings { 11590bcf4a64SBen Hutchings return left->type == right->type && 11600bcf4a64SBen Hutchings left->vpd_sn && right->vpd_sn && 11610bcf4a64SBen Hutchings !strcmp(left->vpd_sn, right->vpd_sn); 11620bcf4a64SBen Hutchings } 11630bcf4a64SBen Hutchings 11640bcf4a64SBen Hutchings static void efx_associate(struct efx_nic *efx) 11650bcf4a64SBen Hutchings { 11660bcf4a64SBen Hutchings struct efx_nic *other, *next; 11670bcf4a64SBen Hutchings 11680bcf4a64SBen Hutchings if (efx->primary == efx) { 11690bcf4a64SBen Hutchings /* Adding primary function; look for secondaries */ 11700bcf4a64SBen Hutchings 11710bcf4a64SBen Hutchings netif_dbg(efx, probe, efx->net_dev, "adding to primary list\n"); 11720bcf4a64SBen Hutchings list_add_tail(&efx->node, &efx_primary_list); 11730bcf4a64SBen Hutchings 11740bcf4a64SBen Hutchings list_for_each_entry_safe(other, next, &efx_unassociated_list, 11750bcf4a64SBen Hutchings node) { 11760bcf4a64SBen Hutchings if (efx_same_controller(efx, other)) { 11770bcf4a64SBen Hutchings list_del(&other->node); 11780bcf4a64SBen Hutchings netif_dbg(other, probe, other->net_dev, 11790bcf4a64SBen Hutchings "moving to secondary list of %s %s\n", 11800bcf4a64SBen Hutchings pci_name(efx->pci_dev), 11810bcf4a64SBen Hutchings efx->net_dev->name); 11820bcf4a64SBen Hutchings list_add_tail(&other->node, 11830bcf4a64SBen Hutchings &efx->secondary_list); 11840bcf4a64SBen Hutchings other->primary = efx; 11850bcf4a64SBen Hutchings } 11860bcf4a64SBen Hutchings } 11870bcf4a64SBen Hutchings } else { 11880bcf4a64SBen Hutchings /* Adding secondary function; look for primary */ 11890bcf4a64SBen Hutchings 11900bcf4a64SBen Hutchings list_for_each_entry(other, &efx_primary_list, node) { 11910bcf4a64SBen Hutchings if (efx_same_controller(efx, other)) { 11920bcf4a64SBen Hutchings netif_dbg(efx, probe, efx->net_dev, 11930bcf4a64SBen Hutchings "adding to secondary list of %s %s\n", 11940bcf4a64SBen Hutchings pci_name(other->pci_dev), 11950bcf4a64SBen Hutchings other->net_dev->name); 11960bcf4a64SBen Hutchings list_add_tail(&efx->node, 11970bcf4a64SBen Hutchings &other->secondary_list); 11980bcf4a64SBen Hutchings efx->primary = other; 11990bcf4a64SBen Hutchings return; 12000bcf4a64SBen Hutchings } 12010bcf4a64SBen Hutchings } 12020bcf4a64SBen Hutchings 12030bcf4a64SBen Hutchings netif_dbg(efx, probe, efx->net_dev, 12040bcf4a64SBen Hutchings "adding to unassociated list\n"); 12050bcf4a64SBen Hutchings list_add_tail(&efx->node, &efx_unassociated_list); 12060bcf4a64SBen Hutchings } 12070bcf4a64SBen Hutchings } 12080bcf4a64SBen Hutchings 12090bcf4a64SBen Hutchings static void efx_dissociate(struct efx_nic *efx) 12100bcf4a64SBen Hutchings { 12110bcf4a64SBen Hutchings struct efx_nic *other, *next; 12120bcf4a64SBen Hutchings 12130bcf4a64SBen Hutchings list_del(&efx->node); 12140bcf4a64SBen Hutchings efx->primary = NULL; 12150bcf4a64SBen Hutchings 12160bcf4a64SBen Hutchings list_for_each_entry_safe(other, next, &efx->secondary_list, node) { 12170bcf4a64SBen Hutchings list_del(&other->node); 12180bcf4a64SBen Hutchings netif_dbg(other, probe, other->net_dev, 12190bcf4a64SBen Hutchings "moving to unassociated list\n"); 12200bcf4a64SBen Hutchings list_add_tail(&other->node, &efx_unassociated_list); 12210bcf4a64SBen Hutchings other->primary = NULL; 12220bcf4a64SBen Hutchings } 12230bcf4a64SBen Hutchings } 12240bcf4a64SBen Hutchings 1225874aeea5SJeff Kirsher /* This configures the PCI device to enable I/O and DMA. */ 1226874aeea5SJeff Kirsher static int efx_init_io(struct efx_nic *efx) 1227874aeea5SJeff Kirsher { 1228874aeea5SJeff Kirsher struct pci_dev *pci_dev = efx->pci_dev; 1229874aeea5SJeff Kirsher dma_addr_t dma_mask = efx->type->max_dma_mask; 1230b105798fSBen Hutchings unsigned int mem_map_size = efx->type->mem_map_size(efx); 123102246a7fSShradha Shah int rc, bar; 1232874aeea5SJeff Kirsher 1233874aeea5SJeff Kirsher netif_dbg(efx, probe, efx->net_dev, "initialising I/O\n"); 1234874aeea5SJeff Kirsher 123502246a7fSShradha Shah bar = efx->type->mem_bar; 123602246a7fSShradha Shah 1237874aeea5SJeff Kirsher rc = pci_enable_device(pci_dev); 1238874aeea5SJeff Kirsher if (rc) { 1239874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 1240874aeea5SJeff Kirsher "failed to enable PCI device\n"); 1241874aeea5SJeff Kirsher goto fail1; 1242874aeea5SJeff Kirsher } 1243874aeea5SJeff Kirsher 1244874aeea5SJeff Kirsher pci_set_master(pci_dev); 1245874aeea5SJeff Kirsher 1246874aeea5SJeff Kirsher /* Set the PCI DMA mask. Try all possibilities from our 1247874aeea5SJeff Kirsher * genuine mask down to 32 bits, because some architectures 1248874aeea5SJeff Kirsher * (e.g. x86_64 with iommu_sac_force set) will allow 40 bit 1249874aeea5SJeff Kirsher * masks event though they reject 46 bit masks. 1250874aeea5SJeff Kirsher */ 1251874aeea5SJeff Kirsher while (dma_mask > 0x7fffffffUL) { 12529663dedaSRussell King rc = dma_set_mask_and_coherent(&pci_dev->dev, dma_mask); 1253e9e01846SBen Hutchings if (rc == 0) 1254874aeea5SJeff Kirsher break; 1255874aeea5SJeff Kirsher dma_mask >>= 1; 1256874aeea5SJeff Kirsher } 1257874aeea5SJeff Kirsher if (rc) { 1258874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 1259874aeea5SJeff Kirsher "could not find a suitable DMA mask\n"); 1260874aeea5SJeff Kirsher goto fail2; 1261874aeea5SJeff Kirsher } 1262874aeea5SJeff Kirsher netif_dbg(efx, probe, efx->net_dev, 1263874aeea5SJeff Kirsher "using DMA mask %llx\n", (unsigned long long) dma_mask); 1264874aeea5SJeff Kirsher 126502246a7fSShradha Shah efx->membase_phys = pci_resource_start(efx->pci_dev, bar); 126602246a7fSShradha Shah rc = pci_request_region(pci_dev, bar, "sfc"); 1267874aeea5SJeff Kirsher if (rc) { 1268874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 1269874aeea5SJeff Kirsher "request for memory BAR failed\n"); 1270874aeea5SJeff Kirsher rc = -EIO; 1271874aeea5SJeff Kirsher goto fail3; 1272874aeea5SJeff Kirsher } 1273b105798fSBen Hutchings efx->membase = ioremap_nocache(efx->membase_phys, mem_map_size); 1274874aeea5SJeff Kirsher if (!efx->membase) { 1275874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 1276874aeea5SJeff Kirsher "could not map memory BAR at %llx+%x\n", 1277b105798fSBen Hutchings (unsigned long long)efx->membase_phys, mem_map_size); 1278874aeea5SJeff Kirsher rc = -ENOMEM; 1279874aeea5SJeff Kirsher goto fail4; 1280874aeea5SJeff Kirsher } 1281874aeea5SJeff Kirsher netif_dbg(efx, probe, efx->net_dev, 1282874aeea5SJeff Kirsher "memory BAR at %llx+%x (virtual %p)\n", 1283b105798fSBen Hutchings (unsigned long long)efx->membase_phys, mem_map_size, 1284b105798fSBen Hutchings efx->membase); 1285874aeea5SJeff Kirsher 1286874aeea5SJeff Kirsher return 0; 1287874aeea5SJeff Kirsher 1288874aeea5SJeff Kirsher fail4: 128902246a7fSShradha Shah pci_release_region(efx->pci_dev, bar); 1290874aeea5SJeff Kirsher fail3: 1291874aeea5SJeff Kirsher efx->membase_phys = 0; 1292874aeea5SJeff Kirsher fail2: 1293874aeea5SJeff Kirsher pci_disable_device(efx->pci_dev); 1294874aeea5SJeff Kirsher fail1: 1295874aeea5SJeff Kirsher return rc; 1296874aeea5SJeff Kirsher } 1297874aeea5SJeff Kirsher 1298874aeea5SJeff Kirsher static void efx_fini_io(struct efx_nic *efx) 1299874aeea5SJeff Kirsher { 130002246a7fSShradha Shah int bar; 130102246a7fSShradha Shah 1302874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "shutting down I/O\n"); 1303874aeea5SJeff Kirsher 1304874aeea5SJeff Kirsher if (efx->membase) { 1305874aeea5SJeff Kirsher iounmap(efx->membase); 1306874aeea5SJeff Kirsher efx->membase = NULL; 1307874aeea5SJeff Kirsher } 1308874aeea5SJeff Kirsher 1309874aeea5SJeff Kirsher if (efx->membase_phys) { 131002246a7fSShradha Shah bar = efx->type->mem_bar; 131102246a7fSShradha Shah pci_release_region(efx->pci_dev, bar); 1312874aeea5SJeff Kirsher efx->membase_phys = 0; 1313874aeea5SJeff Kirsher } 1314874aeea5SJeff Kirsher 13156598dad2SDaniel Pieczko /* Don't disable bus-mastering if VFs are assigned */ 13166598dad2SDaniel Pieczko if (!pci_vfs_assigned(efx->pci_dev)) 1317874aeea5SJeff Kirsher pci_disable_device(efx->pci_dev); 1318874aeea5SJeff Kirsher } 1319874aeea5SJeff Kirsher 1320267c0157SJon Cooper void efx_set_default_rx_indir_table(struct efx_nic *efx) 1321267c0157SJon Cooper { 1322267c0157SJon Cooper size_t i; 1323267c0157SJon Cooper 1324267c0157SJon Cooper for (i = 0; i < ARRAY_SIZE(efx->rx_indir_table); i++) 1325267c0157SJon Cooper efx->rx_indir_table[i] = 1326267c0157SJon Cooper ethtool_rxfh_indir_default(i, efx->rss_spread); 1327267c0157SJon Cooper } 1328267c0157SJon Cooper 1329a9a52506SBen Hutchings static unsigned int efx_wanted_parallelism(struct efx_nic *efx) 1330874aeea5SJeff Kirsher { 1331cdb08f8fSBen Hutchings cpumask_var_t thread_mask; 1332a16e5b24SBen Hutchings unsigned int count; 1333874aeea5SJeff Kirsher int cpu; 1334874aeea5SJeff Kirsher 1335cd2d5b52SBen Hutchings if (rss_cpus) { 1336cd2d5b52SBen Hutchings count = rss_cpus; 1337cd2d5b52SBen Hutchings } else { 1338cdb08f8fSBen Hutchings if (unlikely(!zalloc_cpumask_var(&thread_mask, GFP_KERNEL))) { 1339a9a52506SBen Hutchings netif_warn(efx, probe, efx->net_dev, 1340a9a52506SBen Hutchings "RSS disabled due to allocation failure\n"); 1341874aeea5SJeff Kirsher return 1; 1342874aeea5SJeff Kirsher } 1343874aeea5SJeff Kirsher 1344874aeea5SJeff Kirsher count = 0; 1345874aeea5SJeff Kirsher for_each_online_cpu(cpu) { 1346cdb08f8fSBen Hutchings if (!cpumask_test_cpu(cpu, thread_mask)) { 1347874aeea5SJeff Kirsher ++count; 1348cdb08f8fSBen Hutchings cpumask_or(thread_mask, thread_mask, 134906931e62SBartosz Golaszewski topology_sibling_cpumask(cpu)); 1350874aeea5SJeff Kirsher } 1351874aeea5SJeff Kirsher } 1352874aeea5SJeff Kirsher 1353cdb08f8fSBen Hutchings free_cpumask_var(thread_mask); 1354cd2d5b52SBen Hutchings } 1355cd2d5b52SBen Hutchings 1356cd2d5b52SBen Hutchings /* If RSS is requested for the PF *and* VFs then we can't write RSS 1357cd2d5b52SBen Hutchings * table entries that are inaccessible to VFs 1358cd2d5b52SBen Hutchings */ 13597fa8d547SShradha Shah #ifdef CONFIG_SFC_SRIOV 13607fa8d547SShradha Shah if (efx->type->sriov_wanted) { 1361d98a4ffeSShradha Shah if (efx->type->sriov_wanted(efx) && efx_vf_size(efx) > 1 && 1362cd2d5b52SBen Hutchings count > efx_vf_size(efx)) { 1363cd2d5b52SBen Hutchings netif_warn(efx, probe, efx->net_dev, 1364cd2d5b52SBen Hutchings "Reducing number of RSS channels from %u to %u for " 1365cd2d5b52SBen Hutchings "VF support. Increase vf-msix-limit to use more " 1366cd2d5b52SBen Hutchings "channels on the PF.\n", 1367cd2d5b52SBen Hutchings count, efx_vf_size(efx)); 1368cd2d5b52SBen Hutchings count = efx_vf_size(efx); 1369cd2d5b52SBen Hutchings } 13707fa8d547SShradha Shah } 13717fa8d547SShradha Shah #endif 1372cd2d5b52SBen Hutchings 1373874aeea5SJeff Kirsher return count; 1374874aeea5SJeff Kirsher } 1375874aeea5SJeff Kirsher 1376874aeea5SJeff Kirsher /* Probe the number and type of interrupts we are able to obtain, and 1377874aeea5SJeff Kirsher * the resulting numbers of channels and RX queues. 1378874aeea5SJeff Kirsher */ 1379874aeea5SJeff Kirsher static int efx_probe_interrupts(struct efx_nic *efx) 1380874aeea5SJeff Kirsher { 13817f967c01SBen Hutchings unsigned int extra_channels = 0; 13827f967c01SBen Hutchings unsigned int i, j; 1383a16e5b24SBen Hutchings int rc; 1384874aeea5SJeff Kirsher 13857f967c01SBen Hutchings for (i = 0; i < EFX_MAX_EXTRA_CHANNELS; i++) 13867f967c01SBen Hutchings if (efx->extra_channel_type[i]) 13877f967c01SBen Hutchings ++extra_channels; 13887f967c01SBen Hutchings 1389874aeea5SJeff Kirsher if (efx->interrupt_mode == EFX_INT_MODE_MSIX) { 1390874aeea5SJeff Kirsher struct msix_entry xentries[EFX_MAX_CHANNELS]; 1391a16e5b24SBen Hutchings unsigned int n_channels; 1392874aeea5SJeff Kirsher 1393a9a52506SBen Hutchings n_channels = efx_wanted_parallelism(efx); 1394b0fbdae1SShradha Shah if (efx_separate_tx_channels) 1395874aeea5SJeff Kirsher n_channels *= 2; 13967f967c01SBen Hutchings n_channels += extra_channels; 1397b105798fSBen Hutchings n_channels = min(n_channels, efx->max_channels); 1398874aeea5SJeff Kirsher 1399874aeea5SJeff Kirsher for (i = 0; i < n_channels; i++) 1400874aeea5SJeff Kirsher xentries[i].entry = i; 1401184603d8SAlexander Gordeev rc = pci_enable_msix_range(efx->pci_dev, 1402184603d8SAlexander Gordeev xentries, 1, n_channels); 1403184603d8SAlexander Gordeev if (rc < 0) { 1404184603d8SAlexander Gordeev /* Fall back to single channel MSI */ 1405184603d8SAlexander Gordeev efx->interrupt_mode = EFX_INT_MODE_MSI; 1406184603d8SAlexander Gordeev netif_err(efx, drv, efx->net_dev, 1407184603d8SAlexander Gordeev "could not enable MSI-X\n"); 1408184603d8SAlexander Gordeev } else if (rc < n_channels) { 1409874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, 1410874aeea5SJeff Kirsher "WARNING: Insufficient MSI-X vectors" 1411a16e5b24SBen Hutchings " available (%d < %u).\n", rc, n_channels); 1412874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, 1413874aeea5SJeff Kirsher "WARNING: Performance may be reduced.\n"); 1414874aeea5SJeff Kirsher n_channels = rc; 1415874aeea5SJeff Kirsher } 1416874aeea5SJeff Kirsher 1417184603d8SAlexander Gordeev if (rc > 0) { 1418874aeea5SJeff Kirsher efx->n_channels = n_channels; 14197f967c01SBen Hutchings if (n_channels > extra_channels) 14207f967c01SBen Hutchings n_channels -= extra_channels; 1421b0fbdae1SShradha Shah if (efx_separate_tx_channels) { 1422b0fbdae1SShradha Shah efx->n_tx_channels = min(max(n_channels / 2, 1423b0fbdae1SShradha Shah 1U), 1424b0fbdae1SShradha Shah efx->max_tx_channels); 14257f967c01SBen Hutchings efx->n_rx_channels = max(n_channels - 14267f967c01SBen Hutchings efx->n_tx_channels, 14277f967c01SBen Hutchings 1U); 1428874aeea5SJeff Kirsher } else { 1429b0fbdae1SShradha Shah efx->n_tx_channels = min(n_channels, 1430b0fbdae1SShradha Shah efx->max_tx_channels); 14317f967c01SBen Hutchings efx->n_rx_channels = n_channels; 1432874aeea5SJeff Kirsher } 14337f967c01SBen Hutchings for (i = 0; i < efx->n_channels; i++) 1434874aeea5SJeff Kirsher efx_get_channel(efx, i)->irq = 1435874aeea5SJeff Kirsher xentries[i].vector; 1436874aeea5SJeff Kirsher } 1437874aeea5SJeff Kirsher } 1438874aeea5SJeff Kirsher 1439874aeea5SJeff Kirsher /* Try single interrupt MSI */ 1440874aeea5SJeff Kirsher if (efx->interrupt_mode == EFX_INT_MODE_MSI) { 1441874aeea5SJeff Kirsher efx->n_channels = 1; 1442874aeea5SJeff Kirsher efx->n_rx_channels = 1; 1443874aeea5SJeff Kirsher efx->n_tx_channels = 1; 1444874aeea5SJeff Kirsher rc = pci_enable_msi(efx->pci_dev); 1445874aeea5SJeff Kirsher if (rc == 0) { 1446874aeea5SJeff Kirsher efx_get_channel(efx, 0)->irq = efx->pci_dev->irq; 1447874aeea5SJeff Kirsher } else { 1448874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, 1449874aeea5SJeff Kirsher "could not enable MSI\n"); 1450874aeea5SJeff Kirsher efx->interrupt_mode = EFX_INT_MODE_LEGACY; 1451874aeea5SJeff Kirsher } 1452874aeea5SJeff Kirsher } 1453874aeea5SJeff Kirsher 1454874aeea5SJeff Kirsher /* Assume legacy interrupts */ 1455874aeea5SJeff Kirsher if (efx->interrupt_mode == EFX_INT_MODE_LEGACY) { 1456b0fbdae1SShradha Shah efx->n_channels = 1 + (efx_separate_tx_channels ? 1 : 0); 1457874aeea5SJeff Kirsher efx->n_rx_channels = 1; 1458874aeea5SJeff Kirsher efx->n_tx_channels = 1; 1459874aeea5SJeff Kirsher efx->legacy_irq = efx->pci_dev->irq; 1460874aeea5SJeff Kirsher } 1461874aeea5SJeff Kirsher 14627f967c01SBen Hutchings /* Assign extra channels if possible */ 14637f967c01SBen Hutchings j = efx->n_channels; 14647f967c01SBen Hutchings for (i = 0; i < EFX_MAX_EXTRA_CHANNELS; i++) { 14657f967c01SBen Hutchings if (!efx->extra_channel_type[i]) 14667f967c01SBen Hutchings continue; 14677f967c01SBen Hutchings if (efx->interrupt_mode != EFX_INT_MODE_MSIX || 14687f967c01SBen Hutchings efx->n_channels <= extra_channels) { 14697f967c01SBen Hutchings efx->extra_channel_type[i]->handle_no_channel(efx); 14707f967c01SBen Hutchings } else { 14717f967c01SBen Hutchings --j; 14727f967c01SBen Hutchings efx_get_channel(efx, j)->type = 14737f967c01SBen Hutchings efx->extra_channel_type[i]; 14747f967c01SBen Hutchings } 14757f967c01SBen Hutchings } 14767f967c01SBen Hutchings 1477cd2d5b52SBen Hutchings /* RSS might be usable on VFs even if it is disabled on the PF */ 14787fa8d547SShradha Shah #ifdef CONFIG_SFC_SRIOV 14797fa8d547SShradha Shah if (efx->type->sriov_wanted) { 1480327c685eSShradha Shah efx->rss_spread = ((efx->n_rx_channels > 1 || 1481d98a4ffeSShradha Shah !efx->type->sriov_wanted(efx)) ? 1482cd2d5b52SBen Hutchings efx->n_rx_channels : efx_vf_size(efx)); 14837fa8d547SShradha Shah return 0; 14847fa8d547SShradha Shah } 14857fa8d547SShradha Shah #endif 14867fa8d547SShradha Shah efx->rss_spread = efx->n_rx_channels; 1487cd2d5b52SBen Hutchings 1488874aeea5SJeff Kirsher return 0; 1489874aeea5SJeff Kirsher } 1490874aeea5SJeff Kirsher 1491261e4d96SJon Cooper static int efx_soft_enable_interrupts(struct efx_nic *efx) 1492d8291187SBen Hutchings { 1493261e4d96SJon Cooper struct efx_channel *channel, *end_channel; 1494261e4d96SJon Cooper int rc; 1495d8291187SBen Hutchings 1496d8291187SBen Hutchings BUG_ON(efx->state == STATE_DISABLED); 1497d8291187SBen Hutchings 1498d8291187SBen Hutchings efx->irq_soft_enabled = true; 1499d8291187SBen Hutchings smp_wmb(); 1500d8291187SBen Hutchings 1501d8291187SBen Hutchings efx_for_each_channel(channel, efx) { 1502261e4d96SJon Cooper if (!channel->type->keep_eventq) { 1503261e4d96SJon Cooper rc = efx_init_eventq(channel); 1504261e4d96SJon Cooper if (rc) 1505261e4d96SJon Cooper goto fail; 1506261e4d96SJon Cooper } 1507d8291187SBen Hutchings efx_start_eventq(channel); 1508d8291187SBen Hutchings } 1509d8291187SBen Hutchings 1510d8291187SBen Hutchings efx_mcdi_mode_event(efx); 1511261e4d96SJon Cooper 1512261e4d96SJon Cooper return 0; 1513261e4d96SJon Cooper fail: 1514261e4d96SJon Cooper end_channel = channel; 1515261e4d96SJon Cooper efx_for_each_channel(channel, efx) { 1516261e4d96SJon Cooper if (channel == end_channel) 1517261e4d96SJon Cooper break; 1518261e4d96SJon Cooper efx_stop_eventq(channel); 1519261e4d96SJon Cooper if (!channel->type->keep_eventq) 1520261e4d96SJon Cooper efx_fini_eventq(channel); 1521261e4d96SJon Cooper } 1522261e4d96SJon Cooper 1523261e4d96SJon Cooper return rc; 1524d8291187SBen Hutchings } 1525d8291187SBen Hutchings 1526d8291187SBen Hutchings static void efx_soft_disable_interrupts(struct efx_nic *efx) 1527d8291187SBen Hutchings { 1528d8291187SBen Hutchings struct efx_channel *channel; 1529d8291187SBen Hutchings 1530d8291187SBen Hutchings if (efx->state == STATE_DISABLED) 1531d8291187SBen Hutchings return; 1532d8291187SBen Hutchings 1533d8291187SBen Hutchings efx_mcdi_mode_poll(efx); 1534d8291187SBen Hutchings 1535d8291187SBen Hutchings efx->irq_soft_enabled = false; 1536d8291187SBen Hutchings smp_wmb(); 1537d8291187SBen Hutchings 1538d8291187SBen Hutchings if (efx->legacy_irq) 1539d8291187SBen Hutchings synchronize_irq(efx->legacy_irq); 1540d8291187SBen Hutchings 1541d8291187SBen Hutchings efx_for_each_channel(channel, efx) { 1542d8291187SBen Hutchings if (channel->irq) 1543d8291187SBen Hutchings synchronize_irq(channel->irq); 1544d8291187SBen Hutchings 1545d8291187SBen Hutchings efx_stop_eventq(channel); 1546d8291187SBen Hutchings if (!channel->type->keep_eventq) 1547d8291187SBen Hutchings efx_fini_eventq(channel); 1548d8291187SBen Hutchings } 1549cade715fSBen Hutchings 1550cade715fSBen Hutchings /* Flush the asynchronous MCDI request queue */ 1551cade715fSBen Hutchings efx_mcdi_flush_async(efx); 1552d8291187SBen Hutchings } 1553d8291187SBen Hutchings 1554261e4d96SJon Cooper static int efx_enable_interrupts(struct efx_nic *efx) 15559f2cb71cSBen Hutchings { 1556261e4d96SJon Cooper struct efx_channel *channel, *end_channel; 1557261e4d96SJon Cooper int rc; 15589f2cb71cSBen Hutchings 15598b7325b4SBen Hutchings BUG_ON(efx->state == STATE_DISABLED); 15608b7325b4SBen Hutchings 1561b28405b0SAlexandre Rames if (efx->eeh_disabled_legacy_irq) { 1562b28405b0SAlexandre Rames enable_irq(efx->legacy_irq); 1563b28405b0SAlexandre Rames efx->eeh_disabled_legacy_irq = false; 1564b28405b0SAlexandre Rames } 1565d8291187SBen Hutchings 156686094f7fSBen Hutchings efx->type->irq_enable_master(efx); 15679f2cb71cSBen Hutchings 15689f2cb71cSBen Hutchings efx_for_each_channel(channel, efx) { 1569261e4d96SJon Cooper if (channel->type->keep_eventq) { 1570261e4d96SJon Cooper rc = efx_init_eventq(channel); 1571261e4d96SJon Cooper if (rc) 1572261e4d96SJon Cooper goto fail; 1573261e4d96SJon Cooper } 15749f2cb71cSBen Hutchings } 15759f2cb71cSBen Hutchings 1576261e4d96SJon Cooper rc = efx_soft_enable_interrupts(efx); 1577261e4d96SJon Cooper if (rc) 1578261e4d96SJon Cooper goto fail; 1579261e4d96SJon Cooper 1580261e4d96SJon Cooper return 0; 1581261e4d96SJon Cooper 1582261e4d96SJon Cooper fail: 1583261e4d96SJon Cooper end_channel = channel; 1584261e4d96SJon Cooper efx_for_each_channel(channel, efx) { 1585261e4d96SJon Cooper if (channel == end_channel) 1586261e4d96SJon Cooper break; 1587261e4d96SJon Cooper if (channel->type->keep_eventq) 1588261e4d96SJon Cooper efx_fini_eventq(channel); 1589261e4d96SJon Cooper } 1590261e4d96SJon Cooper 1591261e4d96SJon Cooper efx->type->irq_disable_non_ev(efx); 1592261e4d96SJon Cooper 1593261e4d96SJon Cooper return rc; 15949f2cb71cSBen Hutchings } 15959f2cb71cSBen Hutchings 1596d8291187SBen Hutchings static void efx_disable_interrupts(struct efx_nic *efx) 15979f2cb71cSBen Hutchings { 15989f2cb71cSBen Hutchings struct efx_channel *channel; 15999f2cb71cSBen Hutchings 1600d8291187SBen Hutchings efx_soft_disable_interrupts(efx); 16019f2cb71cSBen Hutchings 16029f2cb71cSBen Hutchings efx_for_each_channel(channel, efx) { 1603d8291187SBen Hutchings if (channel->type->keep_eventq) 16049f2cb71cSBen Hutchings efx_fini_eventq(channel); 16059f2cb71cSBen Hutchings } 1606d8291187SBen Hutchings 160786094f7fSBen Hutchings efx->type->irq_disable_non_ev(efx); 16089f2cb71cSBen Hutchings } 16099f2cb71cSBen Hutchings 1610874aeea5SJeff Kirsher static void efx_remove_interrupts(struct efx_nic *efx) 1611874aeea5SJeff Kirsher { 1612874aeea5SJeff Kirsher struct efx_channel *channel; 1613874aeea5SJeff Kirsher 1614874aeea5SJeff Kirsher /* Remove MSI/MSI-X interrupts */ 1615874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) 1616874aeea5SJeff Kirsher channel->irq = 0; 1617874aeea5SJeff Kirsher pci_disable_msi(efx->pci_dev); 1618874aeea5SJeff Kirsher pci_disable_msix(efx->pci_dev); 1619874aeea5SJeff Kirsher 1620874aeea5SJeff Kirsher /* Remove legacy interrupt */ 1621874aeea5SJeff Kirsher efx->legacy_irq = 0; 1622874aeea5SJeff Kirsher } 1623874aeea5SJeff Kirsher 1624874aeea5SJeff Kirsher static void efx_set_channels(struct efx_nic *efx) 1625874aeea5SJeff Kirsher { 1626874aeea5SJeff Kirsher struct efx_channel *channel; 1627874aeea5SJeff Kirsher struct efx_tx_queue *tx_queue; 1628874aeea5SJeff Kirsher 1629874aeea5SJeff Kirsher efx->tx_channel_offset = 1630b0fbdae1SShradha Shah efx_separate_tx_channels ? 1631b0fbdae1SShradha Shah efx->n_channels - efx->n_tx_channels : 0; 1632874aeea5SJeff Kirsher 163379d68b37SStuart Hodgson /* We need to mark which channels really have RX and TX 163479d68b37SStuart Hodgson * queues, and adjust the TX queue numbers if we have separate 1635874aeea5SJeff Kirsher * RX-only and TX-only channels. 1636874aeea5SJeff Kirsher */ 1637874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) { 163879d68b37SStuart Hodgson if (channel->channel < efx->n_rx_channels) 163979d68b37SStuart Hodgson channel->rx_queue.core_index = channel->channel; 164079d68b37SStuart Hodgson else 164179d68b37SStuart Hodgson channel->rx_queue.core_index = -1; 164279d68b37SStuart Hodgson 1643874aeea5SJeff Kirsher efx_for_each_channel_tx_queue(tx_queue, channel) 1644874aeea5SJeff Kirsher tx_queue->queue -= (efx->tx_channel_offset * 1645874aeea5SJeff Kirsher EFX_TXQ_TYPES); 1646874aeea5SJeff Kirsher } 1647874aeea5SJeff Kirsher } 1648874aeea5SJeff Kirsher 1649874aeea5SJeff Kirsher static int efx_probe_nic(struct efx_nic *efx) 1650874aeea5SJeff Kirsher { 1651874aeea5SJeff Kirsher int rc; 1652874aeea5SJeff Kirsher 1653874aeea5SJeff Kirsher netif_dbg(efx, probe, efx->net_dev, "creating NIC\n"); 1654874aeea5SJeff Kirsher 1655874aeea5SJeff Kirsher /* Carry out hardware-type specific initialisation */ 1656874aeea5SJeff Kirsher rc = efx->type->probe(efx); 1657874aeea5SJeff Kirsher if (rc) 1658874aeea5SJeff Kirsher return rc; 1659874aeea5SJeff Kirsher 1660b0fbdae1SShradha Shah do { 1661b0fbdae1SShradha Shah if (!efx->max_channels || !efx->max_tx_channels) { 1662b0fbdae1SShradha Shah netif_err(efx, drv, efx->net_dev, 1663b0fbdae1SShradha Shah "Insufficient resources to allocate" 1664b0fbdae1SShradha Shah " any channels\n"); 1665b0fbdae1SShradha Shah rc = -ENOSPC; 1666b0fbdae1SShradha Shah goto fail1; 1667b0fbdae1SShradha Shah } 1668b0fbdae1SShradha Shah 1669b0fbdae1SShradha Shah /* Determine the number of channels and queues by trying 1670b0fbdae1SShradha Shah * to hook in MSI-X interrupts. 1671b0fbdae1SShradha Shah */ 1672874aeea5SJeff Kirsher rc = efx_probe_interrupts(efx); 1673874aeea5SJeff Kirsher if (rc) 1674c15eed22SBen Hutchings goto fail1; 1675874aeea5SJeff Kirsher 167652ad762bSDaniel Pieczko efx_set_channels(efx); 167752ad762bSDaniel Pieczko 1678b0fbdae1SShradha Shah /* dimension_resources can fail with EAGAIN */ 1679c15eed22SBen Hutchings rc = efx->type->dimension_resources(efx); 1680b0fbdae1SShradha Shah if (rc != 0 && rc != -EAGAIN) 1681c15eed22SBen Hutchings goto fail2; 168228e47c49SBen Hutchings 1683b0fbdae1SShradha Shah if (rc == -EAGAIN) 1684b0fbdae1SShradha Shah /* try again with new max_channels */ 1685b0fbdae1SShradha Shah efx_remove_interrupts(efx); 1686b0fbdae1SShradha Shah 1687b0fbdae1SShradha Shah } while (rc == -EAGAIN); 1688b0fbdae1SShradha Shah 1689874aeea5SJeff Kirsher if (efx->n_channels > 1) 1690267c0157SJon Cooper netdev_rss_key_fill(&efx->rx_hash_key, 1691267c0157SJon Cooper sizeof(efx->rx_hash_key)); 1692267c0157SJon Cooper efx_set_default_rx_indir_table(efx); 1693874aeea5SJeff Kirsher 1694874aeea5SJeff Kirsher netif_set_real_num_tx_queues(efx->net_dev, efx->n_tx_channels); 1695874aeea5SJeff Kirsher netif_set_real_num_rx_queues(efx->net_dev, efx->n_rx_channels); 1696874aeea5SJeff Kirsher 1697874aeea5SJeff Kirsher /* Initialise the interrupt moderation settings */ 1698539de7c5SBert Kenward efx->irq_mod_step_us = DIV_ROUND_UP(efx->timer_quantum_ns, 1000); 16999e393b30SBen Hutchings efx_init_irq_moderation(efx, tx_irq_mod_usec, rx_irq_mod_usec, true, 17009e393b30SBen Hutchings true); 1701874aeea5SJeff Kirsher 1702874aeea5SJeff Kirsher return 0; 1703874aeea5SJeff Kirsher 1704c15eed22SBen Hutchings fail2: 1705c15eed22SBen Hutchings efx_remove_interrupts(efx); 1706c15eed22SBen Hutchings fail1: 1707874aeea5SJeff Kirsher efx->type->remove(efx); 1708874aeea5SJeff Kirsher return rc; 1709874aeea5SJeff Kirsher } 1710874aeea5SJeff Kirsher 1711874aeea5SJeff Kirsher static void efx_remove_nic(struct efx_nic *efx) 1712874aeea5SJeff Kirsher { 1713874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "destroying NIC\n"); 1714874aeea5SJeff Kirsher 1715874aeea5SJeff Kirsher efx_remove_interrupts(efx); 1716874aeea5SJeff Kirsher efx->type->remove(efx); 1717874aeea5SJeff Kirsher } 1718874aeea5SJeff Kirsher 1719add72477SBen Hutchings static int efx_probe_filters(struct efx_nic *efx) 1720add72477SBen Hutchings { 1721add72477SBen Hutchings int rc; 1722add72477SBen Hutchings 1723add72477SBen Hutchings spin_lock_init(&efx->filter_lock); 17240d322413SEdward Cree init_rwsem(&efx->filter_sem); 1725d248953aSMartin Habets mutex_lock(&efx->mac_lock); 17260d322413SEdward Cree down_write(&efx->filter_sem); 1727add72477SBen Hutchings rc = efx->type->filter_table_probe(efx); 1728add72477SBen Hutchings if (rc) 17290d322413SEdward Cree goto out_unlock; 1730add72477SBen Hutchings 1731add72477SBen Hutchings #ifdef CONFIG_RFS_ACCEL 1732add72477SBen Hutchings if (efx->type->offload_features & NETIF_F_NTUPLE) { 1733faf8dcc1SJon Cooper struct efx_channel *channel; 1734faf8dcc1SJon Cooper int i, success = 1; 1735faf8dcc1SJon Cooper 1736faf8dcc1SJon Cooper efx_for_each_channel(channel, efx) { 1737faf8dcc1SJon Cooper channel->rps_flow_id = 1738faf8dcc1SJon Cooper kcalloc(efx->type->max_rx_ip_filters, 1739faf8dcc1SJon Cooper sizeof(*channel->rps_flow_id), 1740add72477SBen Hutchings GFP_KERNEL); 1741faf8dcc1SJon Cooper if (!channel->rps_flow_id) 1742faf8dcc1SJon Cooper success = 0; 1743faf8dcc1SJon Cooper else 1744faf8dcc1SJon Cooper for (i = 0; 1745faf8dcc1SJon Cooper i < efx->type->max_rx_ip_filters; 1746faf8dcc1SJon Cooper ++i) 1747faf8dcc1SJon Cooper channel->rps_flow_id[i] = 1748faf8dcc1SJon Cooper RPS_FLOW_ID_INVALID; 1749faf8dcc1SJon Cooper } 1750faf8dcc1SJon Cooper 1751faf8dcc1SJon Cooper if (!success) { 1752faf8dcc1SJon Cooper efx_for_each_channel(channel, efx) 1753faf8dcc1SJon Cooper kfree(channel->rps_flow_id); 1754add72477SBen Hutchings efx->type->filter_table_remove(efx); 17550d322413SEdward Cree rc = -ENOMEM; 17560d322413SEdward Cree goto out_unlock; 1757add72477SBen Hutchings } 1758faf8dcc1SJon Cooper 1759faf8dcc1SJon Cooper efx->rps_expire_index = efx->rps_expire_channel = 0; 1760add72477SBen Hutchings } 1761add72477SBen Hutchings #endif 17620d322413SEdward Cree out_unlock: 17630d322413SEdward Cree up_write(&efx->filter_sem); 1764d248953aSMartin Habets mutex_unlock(&efx->mac_lock); 17650d322413SEdward Cree return rc; 1766add72477SBen Hutchings } 1767add72477SBen Hutchings 1768add72477SBen Hutchings static void efx_remove_filters(struct efx_nic *efx) 1769add72477SBen Hutchings { 1770add72477SBen Hutchings #ifdef CONFIG_RFS_ACCEL 1771faf8dcc1SJon Cooper struct efx_channel *channel; 1772faf8dcc1SJon Cooper 1773faf8dcc1SJon Cooper efx_for_each_channel(channel, efx) 1774faf8dcc1SJon Cooper kfree(channel->rps_flow_id); 1775add72477SBen Hutchings #endif 17760d322413SEdward Cree down_write(&efx->filter_sem); 1777add72477SBen Hutchings efx->type->filter_table_remove(efx); 17780d322413SEdward Cree up_write(&efx->filter_sem); 1779add72477SBen Hutchings } 1780add72477SBen Hutchings 1781add72477SBen Hutchings static void efx_restore_filters(struct efx_nic *efx) 1782add72477SBen Hutchings { 17830d322413SEdward Cree down_read(&efx->filter_sem); 1784add72477SBen Hutchings efx->type->filter_table_restore(efx); 17850d322413SEdward Cree up_read(&efx->filter_sem); 1786add72477SBen Hutchings } 1787add72477SBen Hutchings 1788874aeea5SJeff Kirsher /************************************************************************** 1789874aeea5SJeff Kirsher * 1790874aeea5SJeff Kirsher * NIC startup/shutdown 1791874aeea5SJeff Kirsher * 1792874aeea5SJeff Kirsher *************************************************************************/ 1793874aeea5SJeff Kirsher 1794874aeea5SJeff Kirsher static int efx_probe_all(struct efx_nic *efx) 1795874aeea5SJeff Kirsher { 1796874aeea5SJeff Kirsher int rc; 1797874aeea5SJeff Kirsher 1798874aeea5SJeff Kirsher rc = efx_probe_nic(efx); 1799874aeea5SJeff Kirsher if (rc) { 1800874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, "failed to create NIC\n"); 1801874aeea5SJeff Kirsher goto fail1; 1802874aeea5SJeff Kirsher } 1803874aeea5SJeff Kirsher 1804874aeea5SJeff Kirsher rc = efx_probe_port(efx); 1805874aeea5SJeff Kirsher if (rc) { 1806874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, "failed to create port\n"); 1807874aeea5SJeff Kirsher goto fail2; 1808874aeea5SJeff Kirsher } 1809874aeea5SJeff Kirsher 18107e6d06f0SBen Hutchings BUILD_BUG_ON(EFX_DEFAULT_DMAQ_SIZE < EFX_RXQ_MIN_ENT); 18117e6d06f0SBen Hutchings if (WARN_ON(EFX_DEFAULT_DMAQ_SIZE < EFX_TXQ_MIN_ENT(efx))) { 18127e6d06f0SBen Hutchings rc = -EINVAL; 18137e6d06f0SBen Hutchings goto fail3; 18147e6d06f0SBen Hutchings } 1815874aeea5SJeff Kirsher efx->rxq_entries = efx->txq_entries = EFX_DEFAULT_DMAQ_SIZE; 1816874aeea5SJeff Kirsher 18176d8aaaf6SDaniel Pieczko #ifdef CONFIG_SFC_SRIOV 18186d8aaaf6SDaniel Pieczko rc = efx->type->vswitching_probe(efx); 18196d8aaaf6SDaniel Pieczko if (rc) /* not fatal; the PF will still work fine */ 18206d8aaaf6SDaniel Pieczko netif_warn(efx, probe, efx->net_dev, 18216d8aaaf6SDaniel Pieczko "failed to setup vswitching rc=%d;" 18226d8aaaf6SDaniel Pieczko " VFs may not function\n", rc); 18236d8aaaf6SDaniel Pieczko #endif 18246d8aaaf6SDaniel Pieczko 1825874aeea5SJeff Kirsher rc = efx_probe_filters(efx); 1826874aeea5SJeff Kirsher if (rc) { 1827874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 1828874aeea5SJeff Kirsher "failed to create filter tables\n"); 18296d8aaaf6SDaniel Pieczko goto fail4; 1830874aeea5SJeff Kirsher } 1831874aeea5SJeff Kirsher 18327f967c01SBen Hutchings rc = efx_probe_channels(efx); 18337f967c01SBen Hutchings if (rc) 18346d8aaaf6SDaniel Pieczko goto fail5; 18357f967c01SBen Hutchings 1836874aeea5SJeff Kirsher return 0; 1837874aeea5SJeff Kirsher 18386d8aaaf6SDaniel Pieczko fail5: 18397f967c01SBen Hutchings efx_remove_filters(efx); 18406d8aaaf6SDaniel Pieczko fail4: 18416d8aaaf6SDaniel Pieczko #ifdef CONFIG_SFC_SRIOV 18426d8aaaf6SDaniel Pieczko efx->type->vswitching_remove(efx); 18436d8aaaf6SDaniel Pieczko #endif 1844874aeea5SJeff Kirsher fail3: 1845874aeea5SJeff Kirsher efx_remove_port(efx); 1846874aeea5SJeff Kirsher fail2: 1847874aeea5SJeff Kirsher efx_remove_nic(efx); 1848874aeea5SJeff Kirsher fail1: 1849874aeea5SJeff Kirsher return rc; 1850874aeea5SJeff Kirsher } 1851874aeea5SJeff Kirsher 18528b7325b4SBen Hutchings /* If the interface is supposed to be running but is not, start 18538b7325b4SBen Hutchings * the hardware and software data path, regular activity for the port 18548b7325b4SBen Hutchings * (MAC statistics, link polling, etc.) and schedule the port to be 18558b7325b4SBen Hutchings * reconfigured. Interrupts must already be enabled. This function 18568b7325b4SBen Hutchings * is safe to call multiple times, so long as the NIC is not disabled. 18578b7325b4SBen Hutchings * Requires the RTNL lock. 18589f2cb71cSBen Hutchings */ 1859874aeea5SJeff Kirsher static void efx_start_all(struct efx_nic *efx) 1860874aeea5SJeff Kirsher { 1861874aeea5SJeff Kirsher EFX_ASSERT_RESET_SERIALISED(efx); 18628b7325b4SBen Hutchings BUG_ON(efx->state == STATE_DISABLED); 1863874aeea5SJeff Kirsher 1864874aeea5SJeff Kirsher /* Check that it is appropriate to restart the interface. All 1865874aeea5SJeff Kirsher * of these flags are safe to read under just the rtnl lock */ 1866e283546cSEdward Cree if (efx->port_enabled || !netif_running(efx->net_dev) || 1867e283546cSEdward Cree efx->reset_pending) 1868874aeea5SJeff Kirsher return; 1869874aeea5SJeff Kirsher 1870874aeea5SJeff Kirsher efx_start_port(efx); 18719f2cb71cSBen Hutchings efx_start_datapath(efx); 1872874aeea5SJeff Kirsher 1873626950dbSAlexandre Rames /* Start the hardware monitor if there is one */ 1874626950dbSAlexandre Rames if (efx->type->monitor != NULL) 1875874aeea5SJeff Kirsher queue_delayed_work(efx->workqueue, &efx->monitor_work, 1876874aeea5SJeff Kirsher efx_monitor_interval); 1877626950dbSAlexandre Rames 18785a6681e2SEdward Cree /* Link state detection is normally event-driven; we have 1879626950dbSAlexandre Rames * to poll now because we could have missed a change 1880626950dbSAlexandre Rames */ 1881874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 1882874aeea5SJeff Kirsher if (efx->phy_op->poll(efx)) 1883874aeea5SJeff Kirsher efx_link_status_changed(efx); 1884874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 1885874aeea5SJeff Kirsher 1886874aeea5SJeff Kirsher efx->type->start_stats(efx); 1887f8f3b5aeSJon Cooper efx->type->pull_stats(efx); 1888f8f3b5aeSJon Cooper spin_lock_bh(&efx->stats_lock); 1889f8f3b5aeSJon Cooper efx->type->update_stats(efx, NULL, NULL); 1890f8f3b5aeSJon Cooper spin_unlock_bh(&efx->stats_lock); 1891874aeea5SJeff Kirsher } 1892874aeea5SJeff Kirsher 18938b7325b4SBen Hutchings /* Quiesce the hardware and software data path, and regular activity 18948b7325b4SBen Hutchings * for the port without bringing the link down. Safe to call multiple 18958b7325b4SBen Hutchings * times with the NIC in almost any state, but interrupts should be 18968b7325b4SBen Hutchings * enabled. Requires the RTNL lock. 18978b7325b4SBen Hutchings */ 1898874aeea5SJeff Kirsher static void efx_stop_all(struct efx_nic *efx) 1899874aeea5SJeff Kirsher { 1900874aeea5SJeff Kirsher EFX_ASSERT_RESET_SERIALISED(efx); 1901874aeea5SJeff Kirsher 1902874aeea5SJeff Kirsher /* port_enabled can be read safely under the rtnl lock */ 1903874aeea5SJeff Kirsher if (!efx->port_enabled) 1904874aeea5SJeff Kirsher return; 1905874aeea5SJeff Kirsher 1906f8f3b5aeSJon Cooper /* update stats before we go down so we can accurately count 1907f8f3b5aeSJon Cooper * rx_nodesc_drops 1908f8f3b5aeSJon Cooper */ 1909f8f3b5aeSJon Cooper efx->type->pull_stats(efx); 1910f8f3b5aeSJon Cooper spin_lock_bh(&efx->stats_lock); 1911f8f3b5aeSJon Cooper efx->type->update_stats(efx, NULL, NULL); 1912f8f3b5aeSJon Cooper spin_unlock_bh(&efx->stats_lock); 1913874aeea5SJeff Kirsher efx->type->stop_stats(efx); 1914874aeea5SJeff Kirsher efx_stop_port(efx); 1915874aeea5SJeff Kirsher 191629c69a48SBen Hutchings /* Stop the kernel transmit interface. This is only valid if 191729c69a48SBen Hutchings * the device is stopped or detached; otherwise the watchdog 191829c69a48SBen Hutchings * may fire immediately. 191929c69a48SBen Hutchings */ 192029c69a48SBen Hutchings WARN_ON(netif_running(efx->net_dev) && 192129c69a48SBen Hutchings netif_device_present(efx->net_dev)); 19229f2cb71cSBen Hutchings netif_tx_disable(efx->net_dev); 19239f2cb71cSBen Hutchings 19249f2cb71cSBen Hutchings efx_stop_datapath(efx); 1925874aeea5SJeff Kirsher } 1926874aeea5SJeff Kirsher 1927874aeea5SJeff Kirsher static void efx_remove_all(struct efx_nic *efx) 1928874aeea5SJeff Kirsher { 1929874aeea5SJeff Kirsher efx_remove_channels(efx); 19307f967c01SBen Hutchings efx_remove_filters(efx); 19316d8aaaf6SDaniel Pieczko #ifdef CONFIG_SFC_SRIOV 19326d8aaaf6SDaniel Pieczko efx->type->vswitching_remove(efx); 19336d8aaaf6SDaniel Pieczko #endif 1934874aeea5SJeff Kirsher efx_remove_port(efx); 1935874aeea5SJeff Kirsher efx_remove_nic(efx); 1936874aeea5SJeff Kirsher } 1937874aeea5SJeff Kirsher 1938874aeea5SJeff Kirsher /************************************************************************** 1939874aeea5SJeff Kirsher * 1940874aeea5SJeff Kirsher * Interrupt moderation 1941874aeea5SJeff Kirsher * 1942874aeea5SJeff Kirsher **************************************************************************/ 1943539de7c5SBert Kenward unsigned int efx_usecs_to_ticks(struct efx_nic *efx, unsigned int usecs) 1944874aeea5SJeff Kirsher { 1945b548f976SBen Hutchings if (usecs == 0) 1946b548f976SBen Hutchings return 0; 1947539de7c5SBert Kenward if (usecs * 1000 < efx->timer_quantum_ns) 1948874aeea5SJeff Kirsher return 1; /* never round down to 0 */ 1949539de7c5SBert Kenward return usecs * 1000 / efx->timer_quantum_ns; 1950539de7c5SBert Kenward } 1951539de7c5SBert Kenward 1952539de7c5SBert Kenward unsigned int efx_ticks_to_usecs(struct efx_nic *efx, unsigned int ticks) 1953539de7c5SBert Kenward { 1954539de7c5SBert Kenward /* We must round up when converting ticks to microseconds 1955539de7c5SBert Kenward * because we round down when converting the other way. 1956539de7c5SBert Kenward */ 1957539de7c5SBert Kenward return DIV_ROUND_UP(ticks * efx->timer_quantum_ns, 1000); 1958874aeea5SJeff Kirsher } 1959874aeea5SJeff Kirsher 1960874aeea5SJeff Kirsher /* Set interrupt moderation parameters */ 19619e393b30SBen Hutchings int efx_init_irq_moderation(struct efx_nic *efx, unsigned int tx_usecs, 19629e393b30SBen Hutchings unsigned int rx_usecs, bool rx_adaptive, 19639e393b30SBen Hutchings bool rx_may_override_tx) 1964874aeea5SJeff Kirsher { 1965874aeea5SJeff Kirsher struct efx_channel *channel; 1966d95e329aSBert Kenward unsigned int timer_max_us; 1967d95e329aSBert Kenward 1968874aeea5SJeff Kirsher EFX_ASSERT_RESET_SERIALISED(efx); 1969874aeea5SJeff Kirsher 1970d95e329aSBert Kenward timer_max_us = efx->timer_max_ns / 1000; 1971d95e329aSBert Kenward 1972d95e329aSBert Kenward if (tx_usecs > timer_max_us || rx_usecs > timer_max_us) 19739e393b30SBen Hutchings return -EINVAL; 19749e393b30SBen Hutchings 1975539de7c5SBert Kenward if (tx_usecs != rx_usecs && efx->tx_channel_offset == 0 && 19769e393b30SBen Hutchings !rx_may_override_tx) { 19779e393b30SBen Hutchings netif_err(efx, drv, efx->net_dev, "Channels are shared. " 19789e393b30SBen Hutchings "RX and TX IRQ moderation must be equal\n"); 19799e393b30SBen Hutchings return -EINVAL; 19809e393b30SBen Hutchings } 19819e393b30SBen Hutchings 1982874aeea5SJeff Kirsher efx->irq_rx_adaptive = rx_adaptive; 1983539de7c5SBert Kenward efx->irq_rx_moderation_us = rx_usecs; 1984874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) { 1985874aeea5SJeff Kirsher if (efx_channel_has_rx_queue(channel)) 1986539de7c5SBert Kenward channel->irq_moderation_us = rx_usecs; 1987874aeea5SJeff Kirsher else if (efx_channel_has_tx_queues(channel)) 1988539de7c5SBert Kenward channel->irq_moderation_us = tx_usecs; 1989874aeea5SJeff Kirsher } 19909e393b30SBen Hutchings 19919e393b30SBen Hutchings return 0; 1992874aeea5SJeff Kirsher } 1993874aeea5SJeff Kirsher 1994a0c4faf5SBen Hutchings void efx_get_irq_moderation(struct efx_nic *efx, unsigned int *tx_usecs, 1995a0c4faf5SBen Hutchings unsigned int *rx_usecs, bool *rx_adaptive) 1996a0c4faf5SBen Hutchings { 1997a0c4faf5SBen Hutchings *rx_adaptive = efx->irq_rx_adaptive; 1998539de7c5SBert Kenward *rx_usecs = efx->irq_rx_moderation_us; 1999a0c4faf5SBen Hutchings 2000a0c4faf5SBen Hutchings /* If channels are shared between RX and TX, so is IRQ 2001a0c4faf5SBen Hutchings * moderation. Otherwise, IRQ moderation is the same for all 2002a0c4faf5SBen Hutchings * TX channels and is not adaptive. 2003a0c4faf5SBen Hutchings */ 2004539de7c5SBert Kenward if (efx->tx_channel_offset == 0) { 2005a0c4faf5SBen Hutchings *tx_usecs = *rx_usecs; 2006539de7c5SBert Kenward } else { 2007539de7c5SBert Kenward struct efx_channel *tx_channel; 2008539de7c5SBert Kenward 2009539de7c5SBert Kenward tx_channel = efx->channel[efx->tx_channel_offset]; 2010539de7c5SBert Kenward *tx_usecs = tx_channel->irq_moderation_us; 2011539de7c5SBert Kenward } 2012a0c4faf5SBen Hutchings } 2013a0c4faf5SBen Hutchings 2014874aeea5SJeff Kirsher /************************************************************************** 2015874aeea5SJeff Kirsher * 2016874aeea5SJeff Kirsher * Hardware monitor 2017874aeea5SJeff Kirsher * 2018874aeea5SJeff Kirsher **************************************************************************/ 2019874aeea5SJeff Kirsher 2020874aeea5SJeff Kirsher /* Run periodically off the general workqueue */ 2021874aeea5SJeff Kirsher static void efx_monitor(struct work_struct *data) 2022874aeea5SJeff Kirsher { 2023874aeea5SJeff Kirsher struct efx_nic *efx = container_of(data, struct efx_nic, 2024874aeea5SJeff Kirsher monitor_work.work); 2025874aeea5SJeff Kirsher 2026874aeea5SJeff Kirsher netif_vdbg(efx, timer, efx->net_dev, 2027874aeea5SJeff Kirsher "hardware monitor executing on CPU %d\n", 2028874aeea5SJeff Kirsher raw_smp_processor_id()); 2029874aeea5SJeff Kirsher BUG_ON(efx->type->monitor == NULL); 2030874aeea5SJeff Kirsher 2031874aeea5SJeff Kirsher /* If the mac_lock is already held then it is likely a port 2032874aeea5SJeff Kirsher * reconfiguration is already in place, which will likely do 2033874aeea5SJeff Kirsher * most of the work of monitor() anyway. */ 2034874aeea5SJeff Kirsher if (mutex_trylock(&efx->mac_lock)) { 2035874aeea5SJeff Kirsher if (efx->port_enabled) 2036874aeea5SJeff Kirsher efx->type->monitor(efx); 2037874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 2038874aeea5SJeff Kirsher } 2039874aeea5SJeff Kirsher 2040874aeea5SJeff Kirsher queue_delayed_work(efx->workqueue, &efx->monitor_work, 2041874aeea5SJeff Kirsher efx_monitor_interval); 2042874aeea5SJeff Kirsher } 2043874aeea5SJeff Kirsher 2044874aeea5SJeff Kirsher /************************************************************************** 2045874aeea5SJeff Kirsher * 2046874aeea5SJeff Kirsher * ioctls 2047874aeea5SJeff Kirsher * 2048874aeea5SJeff Kirsher *************************************************************************/ 2049874aeea5SJeff Kirsher 2050874aeea5SJeff Kirsher /* Net device ioctl 2051874aeea5SJeff Kirsher * Context: process, rtnl_lock() held. 2052874aeea5SJeff Kirsher */ 2053874aeea5SJeff Kirsher static int efx_ioctl(struct net_device *net_dev, struct ifreq *ifr, int cmd) 2054874aeea5SJeff Kirsher { 2055874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 2056874aeea5SJeff Kirsher struct mii_ioctl_data *data = if_mii(ifr); 2057874aeea5SJeff Kirsher 20587c236c43SStuart Hodgson if (cmd == SIOCSHWTSTAMP) 2059433dc9b3SBen Hutchings return efx_ptp_set_ts_config(efx, ifr); 2060433dc9b3SBen Hutchings if (cmd == SIOCGHWTSTAMP) 2061433dc9b3SBen Hutchings return efx_ptp_get_ts_config(efx, ifr); 20627c236c43SStuart Hodgson 2063874aeea5SJeff Kirsher /* Convert phy_id from older PRTAD/DEVAD format */ 2064874aeea5SJeff Kirsher if ((cmd == SIOCGMIIREG || cmd == SIOCSMIIREG) && 2065874aeea5SJeff Kirsher (data->phy_id & 0xfc00) == 0x0400) 2066874aeea5SJeff Kirsher data->phy_id ^= MDIO_PHY_ID_C45 | 0x0400; 2067874aeea5SJeff Kirsher 2068874aeea5SJeff Kirsher return mdio_mii_ioctl(&efx->mdio, data, cmd); 2069874aeea5SJeff Kirsher } 2070874aeea5SJeff Kirsher 2071874aeea5SJeff Kirsher /************************************************************************** 2072874aeea5SJeff Kirsher * 2073874aeea5SJeff Kirsher * NAPI interface 2074874aeea5SJeff Kirsher * 2075874aeea5SJeff Kirsher **************************************************************************/ 2076874aeea5SJeff Kirsher 20777f967c01SBen Hutchings static void efx_init_napi_channel(struct efx_channel *channel) 2078874aeea5SJeff Kirsher { 20797f967c01SBen Hutchings struct efx_nic *efx = channel->efx; 2080874aeea5SJeff Kirsher 2081874aeea5SJeff Kirsher channel->napi_dev = efx->net_dev; 2082874aeea5SJeff Kirsher netif_napi_add(channel->napi_dev, &channel->napi_str, 2083874aeea5SJeff Kirsher efx_poll, napi_weight); 2084874aeea5SJeff Kirsher } 20857f967c01SBen Hutchings 20867f967c01SBen Hutchings static void efx_init_napi(struct efx_nic *efx) 20877f967c01SBen Hutchings { 20887f967c01SBen Hutchings struct efx_channel *channel; 20897f967c01SBen Hutchings 20907f967c01SBen Hutchings efx_for_each_channel(channel, efx) 20917f967c01SBen Hutchings efx_init_napi_channel(channel); 2092874aeea5SJeff Kirsher } 2093874aeea5SJeff Kirsher 2094874aeea5SJeff Kirsher static void efx_fini_napi_channel(struct efx_channel *channel) 2095874aeea5SJeff Kirsher { 2096973334a1SEric Dumazet if (channel->napi_dev) 2097874aeea5SJeff Kirsher netif_napi_del(&channel->napi_str); 2098973334a1SEric Dumazet 2099874aeea5SJeff Kirsher channel->napi_dev = NULL; 2100874aeea5SJeff Kirsher } 2101874aeea5SJeff Kirsher 2102874aeea5SJeff Kirsher static void efx_fini_napi(struct efx_nic *efx) 2103874aeea5SJeff Kirsher { 2104874aeea5SJeff Kirsher struct efx_channel *channel; 2105874aeea5SJeff Kirsher 2106874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) 2107874aeea5SJeff Kirsher efx_fini_napi_channel(channel); 2108874aeea5SJeff Kirsher } 2109874aeea5SJeff Kirsher 2110874aeea5SJeff Kirsher /************************************************************************** 2111874aeea5SJeff Kirsher * 2112874aeea5SJeff Kirsher * Kernel netpoll interface 2113874aeea5SJeff Kirsher * 2114874aeea5SJeff Kirsher *************************************************************************/ 2115874aeea5SJeff Kirsher 2116874aeea5SJeff Kirsher #ifdef CONFIG_NET_POLL_CONTROLLER 2117874aeea5SJeff Kirsher 2118874aeea5SJeff Kirsher /* Although in the common case interrupts will be disabled, this is not 2119874aeea5SJeff Kirsher * guaranteed. However, all our work happens inside the NAPI callback, 2120874aeea5SJeff Kirsher * so no locking is required. 2121874aeea5SJeff Kirsher */ 2122874aeea5SJeff Kirsher static void efx_netpoll(struct net_device *net_dev) 2123874aeea5SJeff Kirsher { 2124874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 2125874aeea5SJeff Kirsher struct efx_channel *channel; 2126874aeea5SJeff Kirsher 2127874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) 2128874aeea5SJeff Kirsher efx_schedule_channel(channel); 2129874aeea5SJeff Kirsher } 2130874aeea5SJeff Kirsher 2131874aeea5SJeff Kirsher #endif 2132874aeea5SJeff Kirsher 2133874aeea5SJeff Kirsher /************************************************************************** 2134874aeea5SJeff Kirsher * 2135874aeea5SJeff Kirsher * Kernel net device interface 2136874aeea5SJeff Kirsher * 2137874aeea5SJeff Kirsher *************************************************************************/ 2138874aeea5SJeff Kirsher 2139874aeea5SJeff Kirsher /* Context: process, rtnl_lock() held. */ 2140e340be92SShradha Shah int efx_net_open(struct net_device *net_dev) 2141874aeea5SJeff Kirsher { 2142874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 21438b7325b4SBen Hutchings int rc; 21448b7325b4SBen Hutchings 2145874aeea5SJeff Kirsher netif_dbg(efx, ifup, efx->net_dev, "opening device on CPU %d\n", 2146874aeea5SJeff Kirsher raw_smp_processor_id()); 2147874aeea5SJeff Kirsher 21488b7325b4SBen Hutchings rc = efx_check_disabled(efx); 21498b7325b4SBen Hutchings if (rc) 21508b7325b4SBen Hutchings return rc; 2151874aeea5SJeff Kirsher if (efx->phy_mode & PHY_MODE_SPECIAL) 2152874aeea5SJeff Kirsher return -EBUSY; 2153874aeea5SJeff Kirsher if (efx_mcdi_poll_reboot(efx) && efx_reset(efx, RESET_TYPE_ALL)) 2154874aeea5SJeff Kirsher return -EIO; 2155874aeea5SJeff Kirsher 2156874aeea5SJeff Kirsher /* Notify the kernel of the link state polled during driver load, 2157874aeea5SJeff Kirsher * before the monitor starts running */ 2158874aeea5SJeff Kirsher efx_link_status_changed(efx); 2159874aeea5SJeff Kirsher 2160874aeea5SJeff Kirsher efx_start_all(efx); 2161dd40781eSBen Hutchings efx_selftest_async_start(efx); 2162874aeea5SJeff Kirsher return 0; 2163874aeea5SJeff Kirsher } 2164874aeea5SJeff Kirsher 2165874aeea5SJeff Kirsher /* Context: process, rtnl_lock() held. 2166874aeea5SJeff Kirsher * Note that the kernel will ignore our return code; this method 2167874aeea5SJeff Kirsher * should really be a void. 2168874aeea5SJeff Kirsher */ 2169e340be92SShradha Shah int efx_net_stop(struct net_device *net_dev) 2170874aeea5SJeff Kirsher { 2171874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 2172874aeea5SJeff Kirsher 2173874aeea5SJeff Kirsher netif_dbg(efx, ifdown, efx->net_dev, "closing on CPU %d\n", 2174874aeea5SJeff Kirsher raw_smp_processor_id()); 2175874aeea5SJeff Kirsher 2176874aeea5SJeff Kirsher /* Stop the device and flush all the channels */ 2177874aeea5SJeff Kirsher efx_stop_all(efx); 2178874aeea5SJeff Kirsher 2179874aeea5SJeff Kirsher return 0; 2180874aeea5SJeff Kirsher } 2181874aeea5SJeff Kirsher 2182874aeea5SJeff Kirsher /* Context: process, dev_base_lock or RTNL held, non-blocking. */ 2183bc1f4470Sstephen hemminger static void efx_net_stats(struct net_device *net_dev, 21842aa9ef11SBen Hutchings struct rtnl_link_stats64 *stats) 2185874aeea5SJeff Kirsher { 2186874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 2187874aeea5SJeff Kirsher 2188874aeea5SJeff Kirsher spin_lock_bh(&efx->stats_lock); 2189cd0ecc9aSBen Hutchings efx->type->update_stats(efx, NULL, stats); 21901cb34522SBen Hutchings spin_unlock_bh(&efx->stats_lock); 2191874aeea5SJeff Kirsher } 2192874aeea5SJeff Kirsher 2193874aeea5SJeff Kirsher /* Context: netif_tx_lock held, BHs disabled. */ 2194874aeea5SJeff Kirsher static void efx_watchdog(struct net_device *net_dev) 2195874aeea5SJeff Kirsher { 2196874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 2197874aeea5SJeff Kirsher 2198874aeea5SJeff Kirsher netif_err(efx, tx_err, efx->net_dev, 2199874aeea5SJeff Kirsher "TX stuck with port_enabled=%d: resetting channels\n", 2200874aeea5SJeff Kirsher efx->port_enabled); 2201874aeea5SJeff Kirsher 2202874aeea5SJeff Kirsher efx_schedule_reset(efx, RESET_TYPE_TX_WATCHDOG); 2203874aeea5SJeff Kirsher } 2204874aeea5SJeff Kirsher 2205874aeea5SJeff Kirsher 2206874aeea5SJeff Kirsher /* Context: process, rtnl_lock() held. */ 2207874aeea5SJeff Kirsher static int efx_change_mtu(struct net_device *net_dev, int new_mtu) 2208874aeea5SJeff Kirsher { 2209874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 22108b7325b4SBen Hutchings int rc; 2211874aeea5SJeff Kirsher 22128b7325b4SBen Hutchings rc = efx_check_disabled(efx); 22138b7325b4SBen Hutchings if (rc) 22148b7325b4SBen Hutchings return rc; 2215874aeea5SJeff Kirsher 2216874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "changing MTU to %d\n", new_mtu); 2217874aeea5SJeff Kirsher 221829c69a48SBen Hutchings efx_device_detach_sync(efx); 221929c69a48SBen Hutchings efx_stop_all(efx); 222029c69a48SBen Hutchings 2221874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 2222874aeea5SJeff Kirsher net_dev->mtu = new_mtu; 22230d322413SEdward Cree efx_mac_reconfigure(efx); 2224874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 2225874aeea5SJeff Kirsher 2226874aeea5SJeff Kirsher efx_start_all(efx); 222729c69a48SBen Hutchings netif_device_attach(efx->net_dev); 22286c8eef4aSBen Hutchings return 0; 2229874aeea5SJeff Kirsher } 2230874aeea5SJeff Kirsher 2231874aeea5SJeff Kirsher static int efx_set_mac_address(struct net_device *net_dev, void *data) 2232874aeea5SJeff Kirsher { 2233874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 2234874aeea5SJeff Kirsher struct sockaddr *addr = data; 2235e0b3ae30SBen Hutchings u8 *new_addr = addr->sa_data; 2236cfc77c2fSShradha Shah u8 old_addr[6]; 2237cfc77c2fSShradha Shah int rc; 2238874aeea5SJeff Kirsher 2239874aeea5SJeff Kirsher if (!is_valid_ether_addr(new_addr)) { 2240874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, 2241874aeea5SJeff Kirsher "invalid ethernet MAC address requested: %pM\n", 2242874aeea5SJeff Kirsher new_addr); 2243504f9b5aSDanny Kukawka return -EADDRNOTAVAIL; 2244874aeea5SJeff Kirsher } 2245874aeea5SJeff Kirsher 2246cfc77c2fSShradha Shah /* save old address */ 2247cfc77c2fSShradha Shah ether_addr_copy(old_addr, net_dev->dev_addr); 2248cd84ff4dSEdward Cree ether_addr_copy(net_dev->dev_addr, new_addr); 2249910c8789SShradha Shah if (efx->type->set_mac_address) { 2250910c8789SShradha Shah rc = efx->type->set_mac_address(efx); 2251cfc77c2fSShradha Shah if (rc) { 2252cfc77c2fSShradha Shah ether_addr_copy(net_dev->dev_addr, old_addr); 2253cfc77c2fSShradha Shah return rc; 2254cfc77c2fSShradha Shah } 2255cfc77c2fSShradha Shah } 2256874aeea5SJeff Kirsher 2257874aeea5SJeff Kirsher /* Reconfigure the MAC */ 2258874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 22590d322413SEdward Cree efx_mac_reconfigure(efx); 2260874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 2261874aeea5SJeff Kirsher 2262874aeea5SJeff Kirsher return 0; 2263874aeea5SJeff Kirsher } 2264874aeea5SJeff Kirsher 2265874aeea5SJeff Kirsher /* Context: netif_addr_lock held, BHs disabled. */ 22660fca8c97SBen Hutchings static void efx_set_rx_mode(struct net_device *net_dev) 2267874aeea5SJeff Kirsher { 2268874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 2269874aeea5SJeff Kirsher 2270874aeea5SJeff Kirsher if (efx->port_enabled) 2271874aeea5SJeff Kirsher queue_work(efx->workqueue, &efx->mac_work); 2272874aeea5SJeff Kirsher /* Otherwise efx_start_port() will do this */ 2273874aeea5SJeff Kirsher } 2274874aeea5SJeff Kirsher 2275c8f44affSMichał Mirosław static int efx_set_features(struct net_device *net_dev, netdev_features_t data) 2276874aeea5SJeff Kirsher { 2277874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 22784a53ea8aSAndrew Rybchenko int rc; 2279874aeea5SJeff Kirsher 2280874aeea5SJeff Kirsher /* If disabling RX n-tuple filtering, clear existing filters */ 22814a53ea8aSAndrew Rybchenko if (net_dev->features & ~data & NETIF_F_NTUPLE) { 22824a53ea8aSAndrew Rybchenko rc = efx->type->filter_clear_rx(efx, EFX_FILTER_PRI_MANUAL); 22834a53ea8aSAndrew Rybchenko if (rc) 22844a53ea8aSAndrew Rybchenko return rc; 22854a53ea8aSAndrew Rybchenko } 22864a53ea8aSAndrew Rybchenko 22874a53ea8aSAndrew Rybchenko /* If Rx VLAN filter is changed, update filters via mac_reconfigure */ 22884a53ea8aSAndrew Rybchenko if ((net_dev->features ^ data) & NETIF_F_HW_VLAN_CTAG_FILTER) { 22894a53ea8aSAndrew Rybchenko /* efx_set_rx_mode() will schedule MAC work to update filters 22904a53ea8aSAndrew Rybchenko * when a new features are finally set in net_dev. 22914a53ea8aSAndrew Rybchenko */ 22924a53ea8aSAndrew Rybchenko efx_set_rx_mode(net_dev); 22934a53ea8aSAndrew Rybchenko } 2294874aeea5SJeff Kirsher 2295874aeea5SJeff Kirsher return 0; 2296874aeea5SJeff Kirsher } 2297874aeea5SJeff Kirsher 2298b40296fcSWei Yongjun static int efx_get_phys_port_id(struct net_device *net_dev, 229908a7b29bSBert Kenward struct netdev_phys_item_id *ppid) 230008a7b29bSBert Kenward { 230108a7b29bSBert Kenward struct efx_nic *efx = netdev_priv(net_dev); 230208a7b29bSBert Kenward 230308a7b29bSBert Kenward if (efx->type->get_phys_port_id) 230408a7b29bSBert Kenward return efx->type->get_phys_port_id(efx, ppid); 230508a7b29bSBert Kenward else 230608a7b29bSBert Kenward return -EOPNOTSUPP; 230708a7b29bSBert Kenward } 230808a7b29bSBert Kenward 2309ac019f08SBert Kenward static int efx_get_phys_port_name(struct net_device *net_dev, 2310ac019f08SBert Kenward char *name, size_t len) 2311ac019f08SBert Kenward { 2312ac019f08SBert Kenward struct efx_nic *efx = netdev_priv(net_dev); 2313ac019f08SBert Kenward 2314ac019f08SBert Kenward if (snprintf(name, len, "p%u", efx->port_num) >= len) 2315ac019f08SBert Kenward return -EINVAL; 2316ac019f08SBert Kenward return 0; 2317ac019f08SBert Kenward } 2318ac019f08SBert Kenward 23194a53ea8aSAndrew Rybchenko static int efx_vlan_rx_add_vid(struct net_device *net_dev, __be16 proto, u16 vid) 23204a53ea8aSAndrew Rybchenko { 23214a53ea8aSAndrew Rybchenko struct efx_nic *efx = netdev_priv(net_dev); 23224a53ea8aSAndrew Rybchenko 23234a53ea8aSAndrew Rybchenko if (efx->type->vlan_rx_add_vid) 23244a53ea8aSAndrew Rybchenko return efx->type->vlan_rx_add_vid(efx, proto, vid); 23254a53ea8aSAndrew Rybchenko else 23264a53ea8aSAndrew Rybchenko return -EOPNOTSUPP; 23274a53ea8aSAndrew Rybchenko } 23284a53ea8aSAndrew Rybchenko 23294a53ea8aSAndrew Rybchenko static int efx_vlan_rx_kill_vid(struct net_device *net_dev, __be16 proto, u16 vid) 23304a53ea8aSAndrew Rybchenko { 23314a53ea8aSAndrew Rybchenko struct efx_nic *efx = netdev_priv(net_dev); 23324a53ea8aSAndrew Rybchenko 23334a53ea8aSAndrew Rybchenko if (efx->type->vlan_rx_kill_vid) 23344a53ea8aSAndrew Rybchenko return efx->type->vlan_rx_kill_vid(efx, proto, vid); 23354a53ea8aSAndrew Rybchenko else 23364a53ea8aSAndrew Rybchenko return -EOPNOTSUPP; 23374a53ea8aSAndrew Rybchenko } 23384a53ea8aSAndrew Rybchenko 23397fa8d547SShradha Shah static const struct net_device_ops efx_netdev_ops = { 2340874aeea5SJeff Kirsher .ndo_open = efx_net_open, 2341874aeea5SJeff Kirsher .ndo_stop = efx_net_stop, 2342874aeea5SJeff Kirsher .ndo_get_stats64 = efx_net_stats, 2343874aeea5SJeff Kirsher .ndo_tx_timeout = efx_watchdog, 2344874aeea5SJeff Kirsher .ndo_start_xmit = efx_hard_start_xmit, 2345874aeea5SJeff Kirsher .ndo_validate_addr = eth_validate_addr, 2346874aeea5SJeff Kirsher .ndo_do_ioctl = efx_ioctl, 2347874aeea5SJeff Kirsher .ndo_change_mtu = efx_change_mtu, 2348874aeea5SJeff Kirsher .ndo_set_mac_address = efx_set_mac_address, 23490fca8c97SBen Hutchings .ndo_set_rx_mode = efx_set_rx_mode, 2350874aeea5SJeff Kirsher .ndo_set_features = efx_set_features, 23514a53ea8aSAndrew Rybchenko .ndo_vlan_rx_add_vid = efx_vlan_rx_add_vid, 23524a53ea8aSAndrew Rybchenko .ndo_vlan_rx_kill_vid = efx_vlan_rx_kill_vid, 2353cd2d5b52SBen Hutchings #ifdef CONFIG_SFC_SRIOV 23547fa8d547SShradha Shah .ndo_set_vf_mac = efx_sriov_set_vf_mac, 23557fa8d547SShradha Shah .ndo_set_vf_vlan = efx_sriov_set_vf_vlan, 23567fa8d547SShradha Shah .ndo_set_vf_spoofchk = efx_sriov_set_vf_spoofchk, 23577fa8d547SShradha Shah .ndo_get_vf_config = efx_sriov_get_vf_config, 23584392dc69SEdward Cree .ndo_set_vf_link_state = efx_sriov_set_vf_link_state, 2359cd2d5b52SBen Hutchings #endif 236008a7b29bSBert Kenward .ndo_get_phys_port_id = efx_get_phys_port_id, 2361ac019f08SBert Kenward .ndo_get_phys_port_name = efx_get_phys_port_name, 2362874aeea5SJeff Kirsher #ifdef CONFIG_NET_POLL_CONTROLLER 2363874aeea5SJeff Kirsher .ndo_poll_controller = efx_netpoll, 2364874aeea5SJeff Kirsher #endif 2365874aeea5SJeff Kirsher .ndo_setup_tc = efx_setup_tc, 2366874aeea5SJeff Kirsher #ifdef CONFIG_RFS_ACCEL 2367874aeea5SJeff Kirsher .ndo_rx_flow_steer = efx_filter_rfs, 2368874aeea5SJeff Kirsher #endif 2369874aeea5SJeff Kirsher }; 2370874aeea5SJeff Kirsher 2371874aeea5SJeff Kirsher static void efx_update_name(struct efx_nic *efx) 2372874aeea5SJeff Kirsher { 2373874aeea5SJeff Kirsher strcpy(efx->name, efx->net_dev->name); 2374874aeea5SJeff Kirsher efx_mtd_rename(efx); 2375874aeea5SJeff Kirsher efx_set_channel_names(efx); 2376874aeea5SJeff Kirsher } 2377874aeea5SJeff Kirsher 2378874aeea5SJeff Kirsher static int efx_netdev_event(struct notifier_block *this, 2379874aeea5SJeff Kirsher unsigned long event, void *ptr) 2380874aeea5SJeff Kirsher { 2381351638e7SJiri Pirko struct net_device *net_dev = netdev_notifier_info_to_dev(ptr); 2382874aeea5SJeff Kirsher 23837fa8d547SShradha Shah if ((net_dev->netdev_ops == &efx_netdev_ops) && 2384874aeea5SJeff Kirsher event == NETDEV_CHANGENAME) 2385874aeea5SJeff Kirsher efx_update_name(netdev_priv(net_dev)); 2386874aeea5SJeff Kirsher 2387874aeea5SJeff Kirsher return NOTIFY_DONE; 2388874aeea5SJeff Kirsher } 2389874aeea5SJeff Kirsher 2390874aeea5SJeff Kirsher static struct notifier_block efx_netdev_notifier = { 2391874aeea5SJeff Kirsher .notifier_call = efx_netdev_event, 2392874aeea5SJeff Kirsher }; 2393874aeea5SJeff Kirsher 2394874aeea5SJeff Kirsher static ssize_t 2395874aeea5SJeff Kirsher show_phy_type(struct device *dev, struct device_attribute *attr, char *buf) 2396874aeea5SJeff Kirsher { 2397874aeea5SJeff Kirsher struct efx_nic *efx = pci_get_drvdata(to_pci_dev(dev)); 2398874aeea5SJeff Kirsher return sprintf(buf, "%d\n", efx->phy_type); 2399874aeea5SJeff Kirsher } 2400776fbcc9SBen Hutchings static DEVICE_ATTR(phy_type, 0444, show_phy_type, NULL); 2401874aeea5SJeff Kirsher 2402e7fef9b4SEdward Cree #ifdef CONFIG_SFC_MCDI_LOGGING 2403e7fef9b4SEdward Cree static ssize_t show_mcdi_log(struct device *dev, struct device_attribute *attr, 2404e7fef9b4SEdward Cree char *buf) 2405e7fef9b4SEdward Cree { 2406e7fef9b4SEdward Cree struct efx_nic *efx = pci_get_drvdata(to_pci_dev(dev)); 2407e7fef9b4SEdward Cree struct efx_mcdi_iface *mcdi = efx_mcdi(efx); 2408e7fef9b4SEdward Cree 2409e7fef9b4SEdward Cree return scnprintf(buf, PAGE_SIZE, "%d\n", mcdi->logging_enabled); 2410e7fef9b4SEdward Cree } 2411e7fef9b4SEdward Cree static ssize_t set_mcdi_log(struct device *dev, struct device_attribute *attr, 2412e7fef9b4SEdward Cree const char *buf, size_t count) 2413e7fef9b4SEdward Cree { 2414e7fef9b4SEdward Cree struct efx_nic *efx = pci_get_drvdata(to_pci_dev(dev)); 2415e7fef9b4SEdward Cree struct efx_mcdi_iface *mcdi = efx_mcdi(efx); 2416e7fef9b4SEdward Cree bool enable = count > 0 && *buf != '0'; 2417e7fef9b4SEdward Cree 2418e7fef9b4SEdward Cree mcdi->logging_enabled = enable; 2419e7fef9b4SEdward Cree return count; 2420e7fef9b4SEdward Cree } 2421e7fef9b4SEdward Cree static DEVICE_ATTR(mcdi_logging, 0644, show_mcdi_log, set_mcdi_log); 2422e7fef9b4SEdward Cree #endif 2423e7fef9b4SEdward Cree 2424874aeea5SJeff Kirsher static int efx_register_netdev(struct efx_nic *efx) 2425874aeea5SJeff Kirsher { 2426874aeea5SJeff Kirsher struct net_device *net_dev = efx->net_dev; 2427874aeea5SJeff Kirsher struct efx_channel *channel; 2428874aeea5SJeff Kirsher int rc; 2429874aeea5SJeff Kirsher 2430874aeea5SJeff Kirsher net_dev->watchdog_timeo = 5 * HZ; 2431874aeea5SJeff Kirsher net_dev->irq = efx->pci_dev->irq; 24327fa8d547SShradha Shah net_dev->netdev_ops = &efx_netdev_ops; 24337fa8d547SShradha Shah if (efx_nic_rev(efx) >= EFX_REV_HUNT_A0) 24348127d661SBen Hutchings net_dev->priv_flags |= IFF_UNICAST_FLT; 24357ad24ea4SWilfried Klaebe net_dev->ethtool_ops = &efx_ethtool_ops; 24367e6d06f0SBen Hutchings net_dev->gso_max_segs = EFX_TSO_MAX_SEGS; 2437cd94e519SBert Kenward net_dev->min_mtu = EFX_MIN_MTU; 2438cd94e519SBert Kenward net_dev->max_mtu = EFX_MAX_MTU; 2439874aeea5SJeff Kirsher 2440874aeea5SJeff Kirsher rtnl_lock(); 2441874aeea5SJeff Kirsher 24427153f623SBen Hutchings /* Enable resets to be scheduled and check whether any were 24437153f623SBen Hutchings * already requested. If so, the NIC is probably hosed so we 24447153f623SBen Hutchings * abort. 24457153f623SBen Hutchings */ 24467153f623SBen Hutchings efx->state = STATE_READY; 24477153f623SBen Hutchings smp_mb(); /* ensure we change state before checking reset_pending */ 24487153f623SBen Hutchings if (efx->reset_pending) { 24497153f623SBen Hutchings netif_err(efx, probe, efx->net_dev, 24507153f623SBen Hutchings "aborting probe due to scheduled reset\n"); 24517153f623SBen Hutchings rc = -EIO; 24527153f623SBen Hutchings goto fail_locked; 24537153f623SBen Hutchings } 24547153f623SBen Hutchings 2455874aeea5SJeff Kirsher rc = dev_alloc_name(net_dev, net_dev->name); 2456874aeea5SJeff Kirsher if (rc < 0) 2457874aeea5SJeff Kirsher goto fail_locked; 2458874aeea5SJeff Kirsher efx_update_name(efx); 2459874aeea5SJeff Kirsher 24608f8b3d51SBen Hutchings /* Always start with carrier off; PHY events will detect the link */ 24618f8b3d51SBen Hutchings netif_carrier_off(net_dev); 24628f8b3d51SBen Hutchings 2463874aeea5SJeff Kirsher rc = register_netdevice(net_dev); 2464874aeea5SJeff Kirsher if (rc) 2465874aeea5SJeff Kirsher goto fail_locked; 2466874aeea5SJeff Kirsher 2467874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) { 2468874aeea5SJeff Kirsher struct efx_tx_queue *tx_queue; 2469874aeea5SJeff Kirsher efx_for_each_channel_tx_queue(tx_queue, channel) 2470874aeea5SJeff Kirsher efx_init_tx_queue_core_txq(tx_queue); 2471874aeea5SJeff Kirsher } 2472874aeea5SJeff Kirsher 24730bcf4a64SBen Hutchings efx_associate(efx); 24740bcf4a64SBen Hutchings 2475874aeea5SJeff Kirsher rtnl_unlock(); 2476874aeea5SJeff Kirsher 2477874aeea5SJeff Kirsher rc = device_create_file(&efx->pci_dev->dev, &dev_attr_phy_type); 2478874aeea5SJeff Kirsher if (rc) { 2479874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, 2480874aeea5SJeff Kirsher "failed to init net dev attributes\n"); 2481874aeea5SJeff Kirsher goto fail_registered; 2482874aeea5SJeff Kirsher } 2483e7fef9b4SEdward Cree #ifdef CONFIG_SFC_MCDI_LOGGING 2484e7fef9b4SEdward Cree rc = device_create_file(&efx->pci_dev->dev, &dev_attr_mcdi_logging); 2485e7fef9b4SEdward Cree if (rc) { 2486e7fef9b4SEdward Cree netif_err(efx, drv, efx->net_dev, 2487e7fef9b4SEdward Cree "failed to init net dev attributes\n"); 2488e7fef9b4SEdward Cree goto fail_attr_mcdi_logging; 2489e7fef9b4SEdward Cree } 2490e7fef9b4SEdward Cree #endif 2491874aeea5SJeff Kirsher 2492874aeea5SJeff Kirsher return 0; 2493874aeea5SJeff Kirsher 2494e7fef9b4SEdward Cree #ifdef CONFIG_SFC_MCDI_LOGGING 2495e7fef9b4SEdward Cree fail_attr_mcdi_logging: 2496e7fef9b4SEdward Cree device_remove_file(&efx->pci_dev->dev, &dev_attr_phy_type); 2497e7fef9b4SEdward Cree #endif 24987153f623SBen Hutchings fail_registered: 24997153f623SBen Hutchings rtnl_lock(); 25000bcf4a64SBen Hutchings efx_dissociate(efx); 25017153f623SBen Hutchings unregister_netdevice(net_dev); 2502874aeea5SJeff Kirsher fail_locked: 25037153f623SBen Hutchings efx->state = STATE_UNINIT; 2504874aeea5SJeff Kirsher rtnl_unlock(); 2505874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, "could not register net dev\n"); 2506874aeea5SJeff Kirsher return rc; 2507874aeea5SJeff Kirsher } 2508874aeea5SJeff Kirsher 2509874aeea5SJeff Kirsher static void efx_unregister_netdev(struct efx_nic *efx) 2510874aeea5SJeff Kirsher { 2511874aeea5SJeff Kirsher if (!efx->net_dev) 2512874aeea5SJeff Kirsher return; 2513874aeea5SJeff Kirsher 2514874aeea5SJeff Kirsher BUG_ON(netdev_priv(efx->net_dev) != efx); 2515874aeea5SJeff Kirsher 2516e7fef9b4SEdward Cree if (efx_dev_registered(efx)) { 2517874aeea5SJeff Kirsher strlcpy(efx->name, pci_name(efx->pci_dev), sizeof(efx->name)); 2518e7fef9b4SEdward Cree #ifdef CONFIG_SFC_MCDI_LOGGING 2519e7fef9b4SEdward Cree device_remove_file(&efx->pci_dev->dev, &dev_attr_mcdi_logging); 2520e7fef9b4SEdward Cree #endif 2521874aeea5SJeff Kirsher device_remove_file(&efx->pci_dev->dev, &dev_attr_phy_type); 2522e7fef9b4SEdward Cree unregister_netdev(efx->net_dev); 2523e7fef9b4SEdward Cree } 2524874aeea5SJeff Kirsher } 2525874aeea5SJeff Kirsher 2526874aeea5SJeff Kirsher /************************************************************************** 2527874aeea5SJeff Kirsher * 2528874aeea5SJeff Kirsher * Device reset and suspend 2529874aeea5SJeff Kirsher * 2530874aeea5SJeff Kirsher **************************************************************************/ 2531874aeea5SJeff Kirsher 2532874aeea5SJeff Kirsher /* Tears down the entire software state and most of the hardware state 2533874aeea5SJeff Kirsher * before reset. */ 2534874aeea5SJeff Kirsher void efx_reset_down(struct efx_nic *efx, enum reset_type method) 2535874aeea5SJeff Kirsher { 2536874aeea5SJeff Kirsher EFX_ASSERT_RESET_SERIALISED(efx); 2537874aeea5SJeff Kirsher 2538e283546cSEdward Cree if (method == RESET_TYPE_MCDI_TIMEOUT) 2539e283546cSEdward Cree efx->type->prepare_flr(efx); 2540e283546cSEdward Cree 2541874aeea5SJeff Kirsher efx_stop_all(efx); 2542d8291187SBen Hutchings efx_disable_interrupts(efx); 25435642ceefSBen Hutchings 25445642ceefSBen Hutchings mutex_lock(&efx->mac_lock); 2545087e9025SJon Cooper if (efx->port_initialized && method != RESET_TYPE_INVISIBLE && 2546087e9025SJon Cooper method != RESET_TYPE_DATAPATH) 2547874aeea5SJeff Kirsher efx->phy_op->fini(efx); 2548874aeea5SJeff Kirsher efx->type->fini(efx); 2549874aeea5SJeff Kirsher } 2550874aeea5SJeff Kirsher 2551874aeea5SJeff Kirsher /* This function will always ensure that the locks acquired in 2552874aeea5SJeff Kirsher * efx_reset_down() are released. A failure return code indicates 2553874aeea5SJeff Kirsher * that we were unable to reinitialise the hardware, and the 2554874aeea5SJeff Kirsher * driver should be disabled. If ok is false, then the rx and tx 2555874aeea5SJeff Kirsher * engines are not restarted, pending a RESET_DISABLE. */ 2556874aeea5SJeff Kirsher int efx_reset_up(struct efx_nic *efx, enum reset_type method, bool ok) 2557874aeea5SJeff Kirsher { 2558874aeea5SJeff Kirsher int rc; 2559874aeea5SJeff Kirsher 2560874aeea5SJeff Kirsher EFX_ASSERT_RESET_SERIALISED(efx); 2561874aeea5SJeff Kirsher 2562e283546cSEdward Cree if (method == RESET_TYPE_MCDI_TIMEOUT) 2563e283546cSEdward Cree efx->type->finish_flr(efx); 2564e283546cSEdward Cree 2565e283546cSEdward Cree /* Ensure that SRAM is initialised even if we're disabling the device */ 2566874aeea5SJeff Kirsher rc = efx->type->init(efx); 2567874aeea5SJeff Kirsher if (rc) { 2568874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, "failed to initialise NIC\n"); 2569874aeea5SJeff Kirsher goto fail; 2570874aeea5SJeff Kirsher } 2571874aeea5SJeff Kirsher 2572874aeea5SJeff Kirsher if (!ok) 2573874aeea5SJeff Kirsher goto fail; 2574874aeea5SJeff Kirsher 2575087e9025SJon Cooper if (efx->port_initialized && method != RESET_TYPE_INVISIBLE && 2576087e9025SJon Cooper method != RESET_TYPE_DATAPATH) { 2577874aeea5SJeff Kirsher rc = efx->phy_op->init(efx); 2578874aeea5SJeff Kirsher if (rc) 2579874aeea5SJeff Kirsher goto fail; 2580267d9d73SEdward Cree rc = efx->phy_op->reconfigure(efx); 2581267d9d73SEdward Cree if (rc && rc != -EPERM) 2582874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, 2583874aeea5SJeff Kirsher "could not restore PHY settings\n"); 2584874aeea5SJeff Kirsher } 2585874aeea5SJeff Kirsher 2586261e4d96SJon Cooper rc = efx_enable_interrupts(efx); 2587261e4d96SJon Cooper if (rc) 2588261e4d96SJon Cooper goto fail; 25896d8aaaf6SDaniel Pieczko 25906d8aaaf6SDaniel Pieczko #ifdef CONFIG_SFC_SRIOV 25916d8aaaf6SDaniel Pieczko rc = efx->type->vswitching_restore(efx); 25926d8aaaf6SDaniel Pieczko if (rc) /* not fatal; the PF will still work fine */ 25936d8aaaf6SDaniel Pieczko netif_warn(efx, probe, efx->net_dev, 25946d8aaaf6SDaniel Pieczko "failed to restore vswitching rc=%d;" 25956d8aaaf6SDaniel Pieczko " VFs may not function\n", rc); 25966d8aaaf6SDaniel Pieczko #endif 25976d8aaaf6SDaniel Pieczko 25980d322413SEdward Cree down_read(&efx->filter_sem); 2599874aeea5SJeff Kirsher efx_restore_filters(efx); 26000d322413SEdward Cree up_read(&efx->filter_sem); 26017fa8d547SShradha Shah if (efx->type->sriov_reset) 2602d98a4ffeSShradha Shah efx->type->sriov_reset(efx); 2603874aeea5SJeff Kirsher 2604874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 2605874aeea5SJeff Kirsher 2606874aeea5SJeff Kirsher efx_start_all(efx); 2607874aeea5SJeff Kirsher 2608874aeea5SJeff Kirsher return 0; 2609874aeea5SJeff Kirsher 2610874aeea5SJeff Kirsher fail: 2611874aeea5SJeff Kirsher efx->port_initialized = false; 2612874aeea5SJeff Kirsher 2613874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 2614874aeea5SJeff Kirsher 2615874aeea5SJeff Kirsher return rc; 2616874aeea5SJeff Kirsher } 2617874aeea5SJeff Kirsher 2618874aeea5SJeff Kirsher /* Reset the NIC using the specified method. Note that the reset may 2619874aeea5SJeff Kirsher * fail, in which case the card will be left in an unusable state. 2620874aeea5SJeff Kirsher * 2621874aeea5SJeff Kirsher * Caller must hold the rtnl_lock. 2622874aeea5SJeff Kirsher */ 2623874aeea5SJeff Kirsher int efx_reset(struct efx_nic *efx, enum reset_type method) 2624874aeea5SJeff Kirsher { 2625874aeea5SJeff Kirsher int rc, rc2; 2626874aeea5SJeff Kirsher bool disabled; 2627874aeea5SJeff Kirsher 2628874aeea5SJeff Kirsher netif_info(efx, drv, efx->net_dev, "resetting (%s)\n", 2629874aeea5SJeff Kirsher RESET_TYPE(method)); 2630874aeea5SJeff Kirsher 2631c2f3b8e3SDaniel Pieczko efx_device_detach_sync(efx); 2632874aeea5SJeff Kirsher efx_reset_down(efx, method); 2633874aeea5SJeff Kirsher 2634874aeea5SJeff Kirsher rc = efx->type->reset(efx, method); 2635874aeea5SJeff Kirsher if (rc) { 2636874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, "failed to reset hardware\n"); 2637874aeea5SJeff Kirsher goto out; 2638874aeea5SJeff Kirsher } 2639874aeea5SJeff Kirsher 2640874aeea5SJeff Kirsher /* Clear flags for the scopes we covered. We assume the NIC and 2641874aeea5SJeff Kirsher * driver are now quiescent so that there is no race here. 2642874aeea5SJeff Kirsher */ 2643e283546cSEdward Cree if (method < RESET_TYPE_MAX_METHOD) 2644874aeea5SJeff Kirsher efx->reset_pending &= -(1 << (method + 1)); 2645e283546cSEdward Cree else /* it doesn't fit into the well-ordered scope hierarchy */ 2646e283546cSEdward Cree __clear_bit(method, &efx->reset_pending); 2647874aeea5SJeff Kirsher 2648874aeea5SJeff Kirsher /* Reinitialise bus-mastering, which may have been turned off before 2649874aeea5SJeff Kirsher * the reset was scheduled. This is still appropriate, even in the 2650874aeea5SJeff Kirsher * RESET_TYPE_DISABLE since this driver generally assumes the hardware 2651874aeea5SJeff Kirsher * can respond to requests. */ 2652874aeea5SJeff Kirsher pci_set_master(efx->pci_dev); 2653874aeea5SJeff Kirsher 2654874aeea5SJeff Kirsher out: 2655874aeea5SJeff Kirsher /* Leave device stopped if necessary */ 2656626950dbSAlexandre Rames disabled = rc || 2657626950dbSAlexandre Rames method == RESET_TYPE_DISABLE || 2658626950dbSAlexandre Rames method == RESET_TYPE_RECOVER_OR_DISABLE; 2659874aeea5SJeff Kirsher rc2 = efx_reset_up(efx, method, !disabled); 2660874aeea5SJeff Kirsher if (rc2) { 2661874aeea5SJeff Kirsher disabled = true; 2662874aeea5SJeff Kirsher if (!rc) 2663874aeea5SJeff Kirsher rc = rc2; 2664874aeea5SJeff Kirsher } 2665874aeea5SJeff Kirsher 2666874aeea5SJeff Kirsher if (disabled) { 2667874aeea5SJeff Kirsher dev_close(efx->net_dev); 2668874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, "has been disabled\n"); 2669874aeea5SJeff Kirsher efx->state = STATE_DISABLED; 2670874aeea5SJeff Kirsher } else { 2671874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "reset complete\n"); 2672874aeea5SJeff Kirsher netif_device_attach(efx->net_dev); 2673874aeea5SJeff Kirsher } 2674874aeea5SJeff Kirsher return rc; 2675874aeea5SJeff Kirsher } 2676874aeea5SJeff Kirsher 2677626950dbSAlexandre Rames /* Try recovery mechanisms. 2678626950dbSAlexandre Rames * For now only EEH is supported. 2679626950dbSAlexandre Rames * Returns 0 if the recovery mechanisms are unsuccessful. 2680626950dbSAlexandre Rames * Returns a non-zero value otherwise. 2681626950dbSAlexandre Rames */ 2682b28405b0SAlexandre Rames int efx_try_recovery(struct efx_nic *efx) 2683626950dbSAlexandre Rames { 2684626950dbSAlexandre Rames #ifdef CONFIG_EEH 2685626950dbSAlexandre Rames /* A PCI error can occur and not be seen by EEH because nothing 2686626950dbSAlexandre Rames * happens on the PCI bus. In this case the driver may fail and 2687626950dbSAlexandre Rames * schedule a 'recover or reset', leading to this recovery handler. 2688626950dbSAlexandre Rames * Manually call the eeh failure check function. 2689626950dbSAlexandre Rames */ 269012a89dbaSBenjamin Herrenschmidt struct eeh_dev *eehdev = pci_dev_to_eeh_dev(efx->pci_dev); 2691626950dbSAlexandre Rames if (eeh_dev_check_failure(eehdev)) { 2692626950dbSAlexandre Rames /* The EEH mechanisms will handle the error and reset the 2693626950dbSAlexandre Rames * device if necessary. 2694626950dbSAlexandre Rames */ 2695626950dbSAlexandre Rames return 1; 2696626950dbSAlexandre Rames } 2697626950dbSAlexandre Rames #endif 2698626950dbSAlexandre Rames return 0; 2699626950dbSAlexandre Rames } 2700626950dbSAlexandre Rames 270174cd60a4SJon Cooper static void efx_wait_for_bist_end(struct efx_nic *efx) 270274cd60a4SJon Cooper { 270374cd60a4SJon Cooper int i; 270474cd60a4SJon Cooper 270574cd60a4SJon Cooper for (i = 0; i < BIST_WAIT_DELAY_COUNT; ++i) { 270674cd60a4SJon Cooper if (efx_mcdi_poll_reboot(efx)) 270774cd60a4SJon Cooper goto out; 270874cd60a4SJon Cooper msleep(BIST_WAIT_DELAY_MS); 270974cd60a4SJon Cooper } 271074cd60a4SJon Cooper 271174cd60a4SJon Cooper netif_err(efx, drv, efx->net_dev, "Warning: No MC reboot after BIST mode\n"); 271274cd60a4SJon Cooper out: 271374cd60a4SJon Cooper /* Either way unset the BIST flag. If we found no reboot we probably 271474cd60a4SJon Cooper * won't recover, but we should try. 271574cd60a4SJon Cooper */ 271674cd60a4SJon Cooper efx->mc_bist_for_other_fn = false; 271774cd60a4SJon Cooper } 271874cd60a4SJon Cooper 2719874aeea5SJeff Kirsher /* The worker thread exists so that code that cannot sleep can 2720874aeea5SJeff Kirsher * schedule a reset for later. 2721874aeea5SJeff Kirsher */ 2722874aeea5SJeff Kirsher static void efx_reset_work(struct work_struct *data) 2723874aeea5SJeff Kirsher { 2724874aeea5SJeff Kirsher struct efx_nic *efx = container_of(data, struct efx_nic, reset_work); 2725626950dbSAlexandre Rames unsigned long pending; 2726626950dbSAlexandre Rames enum reset_type method; 2727626950dbSAlexandre Rames 2728626950dbSAlexandre Rames pending = ACCESS_ONCE(efx->reset_pending); 2729626950dbSAlexandre Rames method = fls(pending) - 1; 2730626950dbSAlexandre Rames 273174cd60a4SJon Cooper if (method == RESET_TYPE_MC_BIST) 273274cd60a4SJon Cooper efx_wait_for_bist_end(efx); 273374cd60a4SJon Cooper 2734626950dbSAlexandre Rames if ((method == RESET_TYPE_RECOVER_OR_DISABLE || 2735626950dbSAlexandre Rames method == RESET_TYPE_RECOVER_OR_ALL) && 2736626950dbSAlexandre Rames efx_try_recovery(efx)) 2737626950dbSAlexandre Rames return; 2738874aeea5SJeff Kirsher 2739874aeea5SJeff Kirsher if (!pending) 2740874aeea5SJeff Kirsher return; 2741874aeea5SJeff Kirsher 2742874aeea5SJeff Kirsher rtnl_lock(); 27437153f623SBen Hutchings 27447153f623SBen Hutchings /* We checked the state in efx_schedule_reset() but it may 27457153f623SBen Hutchings * have changed by now. Now that we have the RTNL lock, 27467153f623SBen Hutchings * it cannot change again. 27477153f623SBen Hutchings */ 27487153f623SBen Hutchings if (efx->state == STATE_READY) 2749626950dbSAlexandre Rames (void)efx_reset(efx, method); 27507153f623SBen Hutchings 2751874aeea5SJeff Kirsher rtnl_unlock(); 2752874aeea5SJeff Kirsher } 2753874aeea5SJeff Kirsher 2754874aeea5SJeff Kirsher void efx_schedule_reset(struct efx_nic *efx, enum reset_type type) 2755874aeea5SJeff Kirsher { 2756874aeea5SJeff Kirsher enum reset_type method; 2757874aeea5SJeff Kirsher 2758626950dbSAlexandre Rames if (efx->state == STATE_RECOVERY) { 2759626950dbSAlexandre Rames netif_dbg(efx, drv, efx->net_dev, 2760626950dbSAlexandre Rames "recovering: skip scheduling %s reset\n", 2761626950dbSAlexandre Rames RESET_TYPE(type)); 2762626950dbSAlexandre Rames return; 2763626950dbSAlexandre Rames } 2764626950dbSAlexandre Rames 2765874aeea5SJeff Kirsher switch (type) { 2766874aeea5SJeff Kirsher case RESET_TYPE_INVISIBLE: 2767874aeea5SJeff Kirsher case RESET_TYPE_ALL: 2768626950dbSAlexandre Rames case RESET_TYPE_RECOVER_OR_ALL: 2769874aeea5SJeff Kirsher case RESET_TYPE_WORLD: 2770874aeea5SJeff Kirsher case RESET_TYPE_DISABLE: 2771626950dbSAlexandre Rames case RESET_TYPE_RECOVER_OR_DISABLE: 2772087e9025SJon Cooper case RESET_TYPE_DATAPATH: 277374cd60a4SJon Cooper case RESET_TYPE_MC_BIST: 2774e283546cSEdward Cree case RESET_TYPE_MCDI_TIMEOUT: 2775874aeea5SJeff Kirsher method = type; 2776874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "scheduling %s reset\n", 2777874aeea5SJeff Kirsher RESET_TYPE(method)); 2778874aeea5SJeff Kirsher break; 2779874aeea5SJeff Kirsher default: 2780874aeea5SJeff Kirsher method = efx->type->map_reset_reason(type); 2781874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, 2782874aeea5SJeff Kirsher "scheduling %s reset for %s\n", 2783874aeea5SJeff Kirsher RESET_TYPE(method), RESET_TYPE(type)); 2784874aeea5SJeff Kirsher break; 2785874aeea5SJeff Kirsher } 2786874aeea5SJeff Kirsher 2787874aeea5SJeff Kirsher set_bit(method, &efx->reset_pending); 27887153f623SBen Hutchings smp_mb(); /* ensure we change reset_pending before checking state */ 27897153f623SBen Hutchings 27907153f623SBen Hutchings /* If we're not READY then just leave the flags set as the cue 27917153f623SBen Hutchings * to abort probing or reschedule the reset later. 27927153f623SBen Hutchings */ 27937153f623SBen Hutchings if (ACCESS_ONCE(efx->state) != STATE_READY) 27947153f623SBen Hutchings return; 2795874aeea5SJeff Kirsher 2796874aeea5SJeff Kirsher /* efx_process_channel() will no longer read events once a 2797874aeea5SJeff Kirsher * reset is scheduled. So switch back to poll'd MCDI completions. */ 2798874aeea5SJeff Kirsher efx_mcdi_mode_poll(efx); 2799874aeea5SJeff Kirsher 2800874aeea5SJeff Kirsher queue_work(reset_workqueue, &efx->reset_work); 2801874aeea5SJeff Kirsher } 2802874aeea5SJeff Kirsher 2803874aeea5SJeff Kirsher /************************************************************************** 2804874aeea5SJeff Kirsher * 2805874aeea5SJeff Kirsher * List of NICs we support 2806874aeea5SJeff Kirsher * 2807874aeea5SJeff Kirsher **************************************************************************/ 2808874aeea5SJeff Kirsher 2809874aeea5SJeff Kirsher /* PCI device ID table */ 28109baa3c34SBenoit Taine static const struct pci_device_id efx_pci_table[] = { 2811547c474fSBen Hutchings {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0803), /* SFC9020 */ 2812874aeea5SJeff Kirsher .driver_data = (unsigned long) &siena_a0_nic_type}, 2813547c474fSBen Hutchings {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0813), /* SFL9021 */ 2814874aeea5SJeff Kirsher .driver_data = (unsigned long) &siena_a0_nic_type}, 28158127d661SBen Hutchings {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0903), /* SFC9120 PF */ 28168127d661SBen Hutchings .driver_data = (unsigned long) &efx_hunt_a0_nic_type}, 28176f7f8aa6SShradha Shah {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x1903), /* SFC9120 VF */ 28186f7f8aa6SShradha Shah .driver_data = (unsigned long) &efx_hunt_a0_vf_nic_type}, 28193b06a00eSMateusz Wrzesinski {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0923), /* SFC9140 PF */ 28203b06a00eSMateusz Wrzesinski .driver_data = (unsigned long) &efx_hunt_a0_nic_type}, 2821dd248f1bSBert Kenward {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x1923), /* SFC9140 VF */ 2822dd248f1bSBert Kenward .driver_data = (unsigned long) &efx_hunt_a0_vf_nic_type}, 2823dd248f1bSBert Kenward {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0a03), /* SFC9220 PF */ 2824dd248f1bSBert Kenward .driver_data = (unsigned long) &efx_hunt_a0_nic_type}, 2825dd248f1bSBert Kenward {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x1a03), /* SFC9220 VF */ 2826dd248f1bSBert Kenward .driver_data = (unsigned long) &efx_hunt_a0_vf_nic_type}, 2827874aeea5SJeff Kirsher {0} /* end of list */ 2828874aeea5SJeff Kirsher }; 2829874aeea5SJeff Kirsher 2830874aeea5SJeff Kirsher /************************************************************************** 2831874aeea5SJeff Kirsher * 2832874aeea5SJeff Kirsher * Dummy PHY/MAC operations 2833874aeea5SJeff Kirsher * 2834874aeea5SJeff Kirsher * Can be used for some unimplemented operations 2835874aeea5SJeff Kirsher * Needed so all function pointers are valid and do not have to be tested 2836874aeea5SJeff Kirsher * before use 2837874aeea5SJeff Kirsher * 2838874aeea5SJeff Kirsher **************************************************************************/ 2839874aeea5SJeff Kirsher int efx_port_dummy_op_int(struct efx_nic *efx) 2840874aeea5SJeff Kirsher { 2841874aeea5SJeff Kirsher return 0; 2842874aeea5SJeff Kirsher } 2843874aeea5SJeff Kirsher void efx_port_dummy_op_void(struct efx_nic *efx) {} 2844874aeea5SJeff Kirsher 2845874aeea5SJeff Kirsher static bool efx_port_dummy_op_poll(struct efx_nic *efx) 2846874aeea5SJeff Kirsher { 2847874aeea5SJeff Kirsher return false; 2848874aeea5SJeff Kirsher } 2849874aeea5SJeff Kirsher 2850874aeea5SJeff Kirsher static const struct efx_phy_operations efx_dummy_phy_operations = { 2851874aeea5SJeff Kirsher .init = efx_port_dummy_op_int, 2852874aeea5SJeff Kirsher .reconfigure = efx_port_dummy_op_int, 2853874aeea5SJeff Kirsher .poll = efx_port_dummy_op_poll, 2854874aeea5SJeff Kirsher .fini = efx_port_dummy_op_void, 2855874aeea5SJeff Kirsher }; 2856874aeea5SJeff Kirsher 2857874aeea5SJeff Kirsher /************************************************************************** 2858874aeea5SJeff Kirsher * 2859874aeea5SJeff Kirsher * Data housekeeping 2860874aeea5SJeff Kirsher * 2861874aeea5SJeff Kirsher **************************************************************************/ 2862874aeea5SJeff Kirsher 2863874aeea5SJeff Kirsher /* This zeroes out and then fills in the invariants in a struct 2864874aeea5SJeff Kirsher * efx_nic (including all sub-structures). 2865874aeea5SJeff Kirsher */ 2866adeb15aaSBen Hutchings static int efx_init_struct(struct efx_nic *efx, 2867874aeea5SJeff Kirsher struct pci_dev *pci_dev, struct net_device *net_dev) 2868874aeea5SJeff Kirsher { 2869874aeea5SJeff Kirsher int i; 2870874aeea5SJeff Kirsher 2871874aeea5SJeff Kirsher /* Initialise common structures */ 28720bcf4a64SBen Hutchings INIT_LIST_HEAD(&efx->node); 28730bcf4a64SBen Hutchings INIT_LIST_HEAD(&efx->secondary_list); 2874874aeea5SJeff Kirsher spin_lock_init(&efx->biu_lock); 2875874aeea5SJeff Kirsher #ifdef CONFIG_SFC_MTD 2876874aeea5SJeff Kirsher INIT_LIST_HEAD(&efx->mtd_list); 2877874aeea5SJeff Kirsher #endif 2878874aeea5SJeff Kirsher INIT_WORK(&efx->reset_work, efx_reset_work); 2879874aeea5SJeff Kirsher INIT_DELAYED_WORK(&efx->monitor_work, efx_monitor); 2880dd40781eSBen Hutchings INIT_DELAYED_WORK(&efx->selftest_work, efx_selftest_async_work); 2881874aeea5SJeff Kirsher efx->pci_dev = pci_dev; 2882874aeea5SJeff Kirsher efx->msg_enable = debug; 2883f16aeea0SBen Hutchings efx->state = STATE_UNINIT; 2884874aeea5SJeff Kirsher strlcpy(efx->name, pci_name(pci_dev), sizeof(efx->name)); 2885874aeea5SJeff Kirsher 2886874aeea5SJeff Kirsher efx->net_dev = net_dev; 288743a3739dSJon Cooper efx->rx_prefix_size = efx->type->rx_prefix_size; 28882ec03014SAndrew Rybchenko efx->rx_ip_align = 28892ec03014SAndrew Rybchenko NET_IP_ALIGN ? (efx->rx_prefix_size + NET_IP_ALIGN) % 4 : 0; 289043a3739dSJon Cooper efx->rx_packet_hash_offset = 289143a3739dSJon Cooper efx->type->rx_hash_offset - efx->type->rx_prefix_size; 2892bd9a265dSJon Cooper efx->rx_packet_ts_offset = 2893bd9a265dSJon Cooper efx->type->rx_ts_offset - efx->type->rx_prefix_size; 2894874aeea5SJeff Kirsher spin_lock_init(&efx->stats_lock); 2895874aeea5SJeff Kirsher mutex_init(&efx->mac_lock); 2896874aeea5SJeff Kirsher efx->phy_op = &efx_dummy_phy_operations; 2897874aeea5SJeff Kirsher efx->mdio.dev = net_dev; 2898874aeea5SJeff Kirsher INIT_WORK(&efx->mac_work, efx_mac_work); 28999f2cb71cSBen Hutchings init_waitqueue_head(&efx->flush_wq); 2900874aeea5SJeff Kirsher 2901874aeea5SJeff Kirsher for (i = 0; i < EFX_MAX_CHANNELS; i++) { 2902874aeea5SJeff Kirsher efx->channel[i] = efx_alloc_channel(efx, i, NULL); 2903874aeea5SJeff Kirsher if (!efx->channel[i]) 2904874aeea5SJeff Kirsher goto fail; 2905d8291187SBen Hutchings efx->msi_context[i].efx = efx; 2906d8291187SBen Hutchings efx->msi_context[i].index = i; 2907874aeea5SJeff Kirsher } 2908874aeea5SJeff Kirsher 2909874aeea5SJeff Kirsher /* Higher numbered interrupt modes are less capable! */ 2910874aeea5SJeff Kirsher efx->interrupt_mode = max(efx->type->max_interrupt_mode, 2911874aeea5SJeff Kirsher interrupt_mode); 2912874aeea5SJeff Kirsher 2913874aeea5SJeff Kirsher /* Would be good to use the net_dev name, but we're too early */ 2914874aeea5SJeff Kirsher snprintf(efx->workqueue_name, sizeof(efx->workqueue_name), "sfc%s", 2915874aeea5SJeff Kirsher pci_name(pci_dev)); 2916874aeea5SJeff Kirsher efx->workqueue = create_singlethread_workqueue(efx->workqueue_name); 2917874aeea5SJeff Kirsher if (!efx->workqueue) 2918874aeea5SJeff Kirsher goto fail; 2919874aeea5SJeff Kirsher 2920874aeea5SJeff Kirsher return 0; 2921874aeea5SJeff Kirsher 2922874aeea5SJeff Kirsher fail: 2923874aeea5SJeff Kirsher efx_fini_struct(efx); 2924874aeea5SJeff Kirsher return -ENOMEM; 2925874aeea5SJeff Kirsher } 2926874aeea5SJeff Kirsher 2927874aeea5SJeff Kirsher static void efx_fini_struct(struct efx_nic *efx) 2928874aeea5SJeff Kirsher { 2929874aeea5SJeff Kirsher int i; 2930874aeea5SJeff Kirsher 2931874aeea5SJeff Kirsher for (i = 0; i < EFX_MAX_CHANNELS; i++) 2932874aeea5SJeff Kirsher kfree(efx->channel[i]); 2933874aeea5SJeff Kirsher 2934ef215e64SBen Hutchings kfree(efx->vpd_sn); 2935ef215e64SBen Hutchings 2936874aeea5SJeff Kirsher if (efx->workqueue) { 2937874aeea5SJeff Kirsher destroy_workqueue(efx->workqueue); 2938874aeea5SJeff Kirsher efx->workqueue = NULL; 2939874aeea5SJeff Kirsher } 2940874aeea5SJeff Kirsher } 2941874aeea5SJeff Kirsher 2942e4d112e4SEdward Cree void efx_update_sw_stats(struct efx_nic *efx, u64 *stats) 2943e4d112e4SEdward Cree { 2944e4d112e4SEdward Cree u64 n_rx_nodesc_trunc = 0; 2945e4d112e4SEdward Cree struct efx_channel *channel; 2946e4d112e4SEdward Cree 2947e4d112e4SEdward Cree efx_for_each_channel(channel, efx) 2948e4d112e4SEdward Cree n_rx_nodesc_trunc += channel->n_rx_nodesc_trunc; 2949e4d112e4SEdward Cree stats[GENERIC_STAT_rx_nodesc_trunc] = n_rx_nodesc_trunc; 2950e4d112e4SEdward Cree stats[GENERIC_STAT_rx_noskb_drops] = atomic_read(&efx->n_rx_noskb_drops); 2951e4d112e4SEdward Cree } 2952e4d112e4SEdward Cree 2953874aeea5SJeff Kirsher /************************************************************************** 2954874aeea5SJeff Kirsher * 2955874aeea5SJeff Kirsher * PCI interface 2956874aeea5SJeff Kirsher * 2957874aeea5SJeff Kirsher **************************************************************************/ 2958874aeea5SJeff Kirsher 2959874aeea5SJeff Kirsher /* Main body of final NIC shutdown code 2960874aeea5SJeff Kirsher * This is called only at module unload (or hotplug removal). 2961874aeea5SJeff Kirsher */ 2962874aeea5SJeff Kirsher static void efx_pci_remove_main(struct efx_nic *efx) 2963874aeea5SJeff Kirsher { 29647153f623SBen Hutchings /* Flush reset_work. It can no longer be scheduled since we 29657153f623SBen Hutchings * are not READY. 29667153f623SBen Hutchings */ 29677153f623SBen Hutchings BUG_ON(efx->state == STATE_READY); 29687153f623SBen Hutchings cancel_work_sync(&efx->reset_work); 29697153f623SBen Hutchings 2970d8291187SBen Hutchings efx_disable_interrupts(efx); 2971874aeea5SJeff Kirsher efx_nic_fini_interrupt(efx); 2972874aeea5SJeff Kirsher efx_fini_port(efx); 2973874aeea5SJeff Kirsher efx->type->fini(efx); 2974874aeea5SJeff Kirsher efx_fini_napi(efx); 2975874aeea5SJeff Kirsher efx_remove_all(efx); 2976874aeea5SJeff Kirsher } 2977874aeea5SJeff Kirsher 2978874aeea5SJeff Kirsher /* Final NIC shutdown 29792a3fc311SDaniel Pieczko * This is called only at module unload (or hotplug removal). A PF can call 29802a3fc311SDaniel Pieczko * this on its VFs to ensure they are unbound first. 2981874aeea5SJeff Kirsher */ 2982874aeea5SJeff Kirsher static void efx_pci_remove(struct pci_dev *pci_dev) 2983874aeea5SJeff Kirsher { 2984874aeea5SJeff Kirsher struct efx_nic *efx; 2985874aeea5SJeff Kirsher 2986874aeea5SJeff Kirsher efx = pci_get_drvdata(pci_dev); 2987874aeea5SJeff Kirsher if (!efx) 2988874aeea5SJeff Kirsher return; 2989874aeea5SJeff Kirsher 2990874aeea5SJeff Kirsher /* Mark the NIC as fini, then stop the interface */ 2991874aeea5SJeff Kirsher rtnl_lock(); 29920bcf4a64SBen Hutchings efx_dissociate(efx); 2993874aeea5SJeff Kirsher dev_close(efx->net_dev); 2994d8291187SBen Hutchings efx_disable_interrupts(efx); 2995ea6bb99eSEdward Cree efx->state = STATE_UNINIT; 2996874aeea5SJeff Kirsher rtnl_unlock(); 2997874aeea5SJeff Kirsher 29987fa8d547SShradha Shah if (efx->type->sriov_fini) 2999d98a4ffeSShradha Shah efx->type->sriov_fini(efx); 30007fa8d547SShradha Shah 3001874aeea5SJeff Kirsher efx_unregister_netdev(efx); 3002874aeea5SJeff Kirsher 3003874aeea5SJeff Kirsher efx_mtd_remove(efx); 3004874aeea5SJeff Kirsher 3005874aeea5SJeff Kirsher efx_pci_remove_main(efx); 3006874aeea5SJeff Kirsher 3007874aeea5SJeff Kirsher efx_fini_io(efx); 3008874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "shutdown successful\n"); 3009874aeea5SJeff Kirsher 3010874aeea5SJeff Kirsher efx_fini_struct(efx); 3011874aeea5SJeff Kirsher free_netdev(efx->net_dev); 3012626950dbSAlexandre Rames 3013626950dbSAlexandre Rames pci_disable_pcie_error_reporting(pci_dev); 3014874aeea5SJeff Kirsher }; 3015874aeea5SJeff Kirsher 3016460eeaa0SBen Hutchings /* NIC VPD information 3017460eeaa0SBen Hutchings * Called during probe to display the part number of the 3018460eeaa0SBen Hutchings * installed NIC. VPD is potentially very large but this should 3019460eeaa0SBen Hutchings * always appear within the first 512 bytes. 3020460eeaa0SBen Hutchings */ 3021460eeaa0SBen Hutchings #define SFC_VPD_LEN 512 3022ef215e64SBen Hutchings static void efx_probe_vpd_strings(struct efx_nic *efx) 3023460eeaa0SBen Hutchings { 3024460eeaa0SBen Hutchings struct pci_dev *dev = efx->pci_dev; 3025460eeaa0SBen Hutchings char vpd_data[SFC_VPD_LEN]; 3026460eeaa0SBen Hutchings ssize_t vpd_size; 3027ef215e64SBen Hutchings int ro_start, ro_size, i, j; 3028460eeaa0SBen Hutchings 3029460eeaa0SBen Hutchings /* Get the vpd data from the device */ 3030460eeaa0SBen Hutchings vpd_size = pci_read_vpd(dev, 0, sizeof(vpd_data), vpd_data); 3031460eeaa0SBen Hutchings if (vpd_size <= 0) { 3032460eeaa0SBen Hutchings netif_err(efx, drv, efx->net_dev, "Unable to read VPD\n"); 3033460eeaa0SBen Hutchings return; 3034460eeaa0SBen Hutchings } 3035460eeaa0SBen Hutchings 3036460eeaa0SBen Hutchings /* Get the Read only section */ 3037ef215e64SBen Hutchings ro_start = pci_vpd_find_tag(vpd_data, 0, vpd_size, PCI_VPD_LRDT_RO_DATA); 3038ef215e64SBen Hutchings if (ro_start < 0) { 3039460eeaa0SBen Hutchings netif_err(efx, drv, efx->net_dev, "VPD Read-only not found\n"); 3040460eeaa0SBen Hutchings return; 3041460eeaa0SBen Hutchings } 3042460eeaa0SBen Hutchings 3043ef215e64SBen Hutchings ro_size = pci_vpd_lrdt_size(&vpd_data[ro_start]); 3044ef215e64SBen Hutchings j = ro_size; 3045ef215e64SBen Hutchings i = ro_start + PCI_VPD_LRDT_TAG_SIZE; 3046460eeaa0SBen Hutchings if (i + j > vpd_size) 3047460eeaa0SBen Hutchings j = vpd_size - i; 3048460eeaa0SBen Hutchings 3049460eeaa0SBen Hutchings /* Get the Part number */ 3050460eeaa0SBen Hutchings i = pci_vpd_find_info_keyword(vpd_data, i, j, "PN"); 3051460eeaa0SBen Hutchings if (i < 0) { 3052460eeaa0SBen Hutchings netif_err(efx, drv, efx->net_dev, "Part number not found\n"); 3053460eeaa0SBen Hutchings return; 3054460eeaa0SBen Hutchings } 3055460eeaa0SBen Hutchings 3056460eeaa0SBen Hutchings j = pci_vpd_info_field_size(&vpd_data[i]); 3057460eeaa0SBen Hutchings i += PCI_VPD_INFO_FLD_HDR_SIZE; 3058460eeaa0SBen Hutchings if (i + j > vpd_size) { 3059460eeaa0SBen Hutchings netif_err(efx, drv, efx->net_dev, "Incomplete part number\n"); 3060460eeaa0SBen Hutchings return; 3061460eeaa0SBen Hutchings } 3062460eeaa0SBen Hutchings 3063460eeaa0SBen Hutchings netif_info(efx, drv, efx->net_dev, 3064460eeaa0SBen Hutchings "Part Number : %.*s\n", j, &vpd_data[i]); 3065ef215e64SBen Hutchings 3066ef215e64SBen Hutchings i = ro_start + PCI_VPD_LRDT_TAG_SIZE; 3067ef215e64SBen Hutchings j = ro_size; 3068ef215e64SBen Hutchings i = pci_vpd_find_info_keyword(vpd_data, i, j, "SN"); 3069ef215e64SBen Hutchings if (i < 0) { 3070ef215e64SBen Hutchings netif_err(efx, drv, efx->net_dev, "Serial number not found\n"); 3071ef215e64SBen Hutchings return; 3072ef215e64SBen Hutchings } 3073ef215e64SBen Hutchings 3074ef215e64SBen Hutchings j = pci_vpd_info_field_size(&vpd_data[i]); 3075ef215e64SBen Hutchings i += PCI_VPD_INFO_FLD_HDR_SIZE; 3076ef215e64SBen Hutchings if (i + j > vpd_size) { 3077ef215e64SBen Hutchings netif_err(efx, drv, efx->net_dev, "Incomplete serial number\n"); 3078ef215e64SBen Hutchings return; 3079ef215e64SBen Hutchings } 3080ef215e64SBen Hutchings 3081ef215e64SBen Hutchings efx->vpd_sn = kmalloc(j + 1, GFP_KERNEL); 3082ef215e64SBen Hutchings if (!efx->vpd_sn) 3083ef215e64SBen Hutchings return; 3084ef215e64SBen Hutchings 3085ef215e64SBen Hutchings snprintf(efx->vpd_sn, j + 1, "%s", &vpd_data[i]); 3086460eeaa0SBen Hutchings } 3087460eeaa0SBen Hutchings 3088460eeaa0SBen Hutchings 3089874aeea5SJeff Kirsher /* Main body of NIC initialisation 3090874aeea5SJeff Kirsher * This is called at module load (or hotplug insertion, theoretically). 3091874aeea5SJeff Kirsher */ 3092874aeea5SJeff Kirsher static int efx_pci_probe_main(struct efx_nic *efx) 3093874aeea5SJeff Kirsher { 3094874aeea5SJeff Kirsher int rc; 3095874aeea5SJeff Kirsher 3096874aeea5SJeff Kirsher /* Do start-of-day initialisation */ 3097874aeea5SJeff Kirsher rc = efx_probe_all(efx); 3098874aeea5SJeff Kirsher if (rc) 3099874aeea5SJeff Kirsher goto fail1; 3100874aeea5SJeff Kirsher 3101874aeea5SJeff Kirsher efx_init_napi(efx); 3102874aeea5SJeff Kirsher 3103874aeea5SJeff Kirsher rc = efx->type->init(efx); 3104874aeea5SJeff Kirsher if (rc) { 3105874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 3106874aeea5SJeff Kirsher "failed to initialise NIC\n"); 3107874aeea5SJeff Kirsher goto fail3; 3108874aeea5SJeff Kirsher } 3109874aeea5SJeff Kirsher 3110874aeea5SJeff Kirsher rc = efx_init_port(efx); 3111874aeea5SJeff Kirsher if (rc) { 3112874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 3113874aeea5SJeff Kirsher "failed to initialise port\n"); 3114874aeea5SJeff Kirsher goto fail4; 3115874aeea5SJeff Kirsher } 3116874aeea5SJeff Kirsher 3117874aeea5SJeff Kirsher rc = efx_nic_init_interrupt(efx); 3118874aeea5SJeff Kirsher if (rc) 3119874aeea5SJeff Kirsher goto fail5; 3120261e4d96SJon Cooper rc = efx_enable_interrupts(efx); 3121261e4d96SJon Cooper if (rc) 3122261e4d96SJon Cooper goto fail6; 3123874aeea5SJeff Kirsher 3124874aeea5SJeff Kirsher return 0; 3125874aeea5SJeff Kirsher 3126261e4d96SJon Cooper fail6: 3127261e4d96SJon Cooper efx_nic_fini_interrupt(efx); 3128874aeea5SJeff Kirsher fail5: 3129874aeea5SJeff Kirsher efx_fini_port(efx); 3130874aeea5SJeff Kirsher fail4: 3131874aeea5SJeff Kirsher efx->type->fini(efx); 3132874aeea5SJeff Kirsher fail3: 3133874aeea5SJeff Kirsher efx_fini_napi(efx); 3134874aeea5SJeff Kirsher efx_remove_all(efx); 3135874aeea5SJeff Kirsher fail1: 3136874aeea5SJeff Kirsher return rc; 3137874aeea5SJeff Kirsher } 3138874aeea5SJeff Kirsher 3139874aeea5SJeff Kirsher /* NIC initialisation 3140874aeea5SJeff Kirsher * 3141874aeea5SJeff Kirsher * This is called at module load (or hotplug insertion, 314273ba7b68SBen Hutchings * theoretically). It sets up PCI mappings, resets the NIC, 3143874aeea5SJeff Kirsher * sets up and registers the network devices with the kernel and hooks 3144874aeea5SJeff Kirsher * the interrupt service routine. It does not prepare the device for 3145874aeea5SJeff Kirsher * transmission; this is left to the first time one of the network 3146874aeea5SJeff Kirsher * interfaces is brought up (i.e. efx_net_open). 3147874aeea5SJeff Kirsher */ 314887d1fc11SBill Pemberton static int efx_pci_probe(struct pci_dev *pci_dev, 3149874aeea5SJeff Kirsher const struct pci_device_id *entry) 3150874aeea5SJeff Kirsher { 3151874aeea5SJeff Kirsher struct net_device *net_dev; 3152874aeea5SJeff Kirsher struct efx_nic *efx; 3153fadac6aaSBen Hutchings int rc; 3154874aeea5SJeff Kirsher 3155874aeea5SJeff Kirsher /* Allocate and initialise a struct net_device and struct efx_nic */ 3156874aeea5SJeff Kirsher net_dev = alloc_etherdev_mqs(sizeof(*efx), EFX_MAX_CORE_TX_QUEUES, 3157874aeea5SJeff Kirsher EFX_MAX_RX_QUEUES); 3158874aeea5SJeff Kirsher if (!net_dev) 3159874aeea5SJeff Kirsher return -ENOMEM; 3160adeb15aaSBen Hutchings efx = netdev_priv(net_dev); 3161adeb15aaSBen Hutchings efx->type = (const struct efx_nic_type *) entry->driver_data; 3162ebfcd0fdSAndrew Rybchenko efx->fixed_features |= NETIF_F_HIGHDMA; 3163eb7cfd8cSAndrew Rybchenko 3164874aeea5SJeff Kirsher pci_set_drvdata(pci_dev, efx); 3165874aeea5SJeff Kirsher SET_NETDEV_DEV(net_dev, &pci_dev->dev); 3166adeb15aaSBen Hutchings rc = efx_init_struct(efx, pci_dev, net_dev); 3167874aeea5SJeff Kirsher if (rc) 3168874aeea5SJeff Kirsher goto fail1; 3169874aeea5SJeff Kirsher 3170874aeea5SJeff Kirsher netif_info(efx, probe, efx->net_dev, 3171874aeea5SJeff Kirsher "Solarflare NIC detected\n"); 3172874aeea5SJeff Kirsher 31736f7f8aa6SShradha Shah if (!efx->type->is_vf) 3174ef215e64SBen Hutchings efx_probe_vpd_strings(efx); 3175460eeaa0SBen Hutchings 3176874aeea5SJeff Kirsher /* Set up basic I/O (BAR mappings etc) */ 3177874aeea5SJeff Kirsher rc = efx_init_io(efx); 3178874aeea5SJeff Kirsher if (rc) 3179874aeea5SJeff Kirsher goto fail2; 3180874aeea5SJeff Kirsher 3181874aeea5SJeff Kirsher rc = efx_pci_probe_main(efx); 3182fadac6aaSBen Hutchings if (rc) 3183874aeea5SJeff Kirsher goto fail3; 3184874aeea5SJeff Kirsher 318546d1efd8SEdward Cree net_dev->features |= (efx->type->offload_features | NETIF_F_SG | 318646d1efd8SEdward Cree NETIF_F_TSO | NETIF_F_RXCSUM); 318746d1efd8SEdward Cree if (efx->type->offload_features & (NETIF_F_IPV6_CSUM | NETIF_F_HW_CSUM)) 318846d1efd8SEdward Cree net_dev->features |= NETIF_F_TSO6; 318946d1efd8SEdward Cree /* Check whether device supports TSO */ 319046d1efd8SEdward Cree if (!efx->type->tso_versions || !efx->type->tso_versions(efx)) 319146d1efd8SEdward Cree net_dev->features &= ~NETIF_F_ALL_TSO; 319246d1efd8SEdward Cree /* Mask for features that also apply to VLAN devices */ 319346d1efd8SEdward Cree net_dev->vlan_features |= (NETIF_F_HW_CSUM | NETIF_F_SG | 319446d1efd8SEdward Cree NETIF_F_HIGHDMA | NETIF_F_ALL_TSO | 319546d1efd8SEdward Cree NETIF_F_RXCSUM); 319646d1efd8SEdward Cree 319746d1efd8SEdward Cree net_dev->hw_features = net_dev->features & ~efx->fixed_features; 319846d1efd8SEdward Cree 319946d1efd8SEdward Cree /* Disable VLAN filtering by default. It may be enforced if 320046d1efd8SEdward Cree * the feature is fixed (i.e. VLAN filters are required to 320146d1efd8SEdward Cree * receive VLAN tagged packets due to vPort restrictions). 320246d1efd8SEdward Cree */ 320346d1efd8SEdward Cree net_dev->features &= ~NETIF_F_HW_VLAN_CTAG_FILTER; 320446d1efd8SEdward Cree net_dev->features |= efx->fixed_features; 320546d1efd8SEdward Cree 3206874aeea5SJeff Kirsher rc = efx_register_netdev(efx); 3207874aeea5SJeff Kirsher if (rc) 3208fadac6aaSBen Hutchings goto fail4; 3209874aeea5SJeff Kirsher 32107fa8d547SShradha Shah if (efx->type->sriov_init) { 3211d98a4ffeSShradha Shah rc = efx->type->sriov_init(efx); 3212cd2d5b52SBen Hutchings if (rc) 3213cd2d5b52SBen Hutchings netif_err(efx, probe, efx->net_dev, 3214cd2d5b52SBen Hutchings "SR-IOV can't be enabled rc %d\n", rc); 32157fa8d547SShradha Shah } 3216cd2d5b52SBen Hutchings 3217874aeea5SJeff Kirsher netif_dbg(efx, probe, efx->net_dev, "initialisation successful\n"); 3218874aeea5SJeff Kirsher 32197c43161cSBen Hutchings /* Try to create MTDs, but allow this to fail */ 3220874aeea5SJeff Kirsher rtnl_lock(); 32217c43161cSBen Hutchings rc = efx_mtd_probe(efx); 3222874aeea5SJeff Kirsher rtnl_unlock(); 322309a04204SBert Kenward if (rc && rc != -EPERM) 32247c43161cSBen Hutchings netif_warn(efx, probe, efx->net_dev, 32257c43161cSBen Hutchings "failed to create MTDs (%d)\n", rc); 32267c43161cSBen Hutchings 3227626950dbSAlexandre Rames rc = pci_enable_pcie_error_reporting(pci_dev); 3228626950dbSAlexandre Rames if (rc && rc != -EINVAL) 322909a04204SBert Kenward netif_notice(efx, probe, efx->net_dev, 323009a04204SBert Kenward "PCIE error reporting unavailable (%d).\n", 323109a04204SBert Kenward rc); 3232626950dbSAlexandre Rames 3233874aeea5SJeff Kirsher return 0; 3234874aeea5SJeff Kirsher 3235874aeea5SJeff Kirsher fail4: 3236fadac6aaSBen Hutchings efx_pci_remove_main(efx); 3237874aeea5SJeff Kirsher fail3: 3238874aeea5SJeff Kirsher efx_fini_io(efx); 3239874aeea5SJeff Kirsher fail2: 3240874aeea5SJeff Kirsher efx_fini_struct(efx); 3241874aeea5SJeff Kirsher fail1: 3242874aeea5SJeff Kirsher WARN_ON(rc > 0); 3243874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "initialisation failed. rc=%d\n", rc); 3244874aeea5SJeff Kirsher free_netdev(net_dev); 3245874aeea5SJeff Kirsher return rc; 3246874aeea5SJeff Kirsher } 3247874aeea5SJeff Kirsher 3248834e23ddSShradha Shah /* efx_pci_sriov_configure returns the actual number of Virtual Functions 3249834e23ddSShradha Shah * enabled on success 3250834e23ddSShradha Shah */ 3251834e23ddSShradha Shah #ifdef CONFIG_SFC_SRIOV 3252834e23ddSShradha Shah static int efx_pci_sriov_configure(struct pci_dev *dev, int num_vfs) 3253834e23ddSShradha Shah { 3254834e23ddSShradha Shah int rc; 3255834e23ddSShradha Shah struct efx_nic *efx = pci_get_drvdata(dev); 3256834e23ddSShradha Shah 3257834e23ddSShradha Shah if (efx->type->sriov_configure) { 3258834e23ddSShradha Shah rc = efx->type->sriov_configure(efx, num_vfs); 3259834e23ddSShradha Shah if (rc) 3260834e23ddSShradha Shah return rc; 3261834e23ddSShradha Shah else 3262834e23ddSShradha Shah return num_vfs; 3263834e23ddSShradha Shah } else 3264834e23ddSShradha Shah return -EOPNOTSUPP; 3265834e23ddSShradha Shah } 3266834e23ddSShradha Shah #endif 3267834e23ddSShradha Shah 3268874aeea5SJeff Kirsher static int efx_pm_freeze(struct device *dev) 3269874aeea5SJeff Kirsher { 3270874aeea5SJeff Kirsher struct efx_nic *efx = pci_get_drvdata(to_pci_dev(dev)); 3271874aeea5SJeff Kirsher 327261da026dSBen Hutchings rtnl_lock(); 327361da026dSBen Hutchings 32746032fb56SBen Hutchings if (efx->state != STATE_DISABLED) { 3275f16aeea0SBen Hutchings efx->state = STATE_UNINIT; 3276874aeea5SJeff Kirsher 3277c2f3b8e3SDaniel Pieczko efx_device_detach_sync(efx); 3278874aeea5SJeff Kirsher 3279874aeea5SJeff Kirsher efx_stop_all(efx); 3280d8291187SBen Hutchings efx_disable_interrupts(efx); 32816032fb56SBen Hutchings } 3282874aeea5SJeff Kirsher 328361da026dSBen Hutchings rtnl_unlock(); 328461da026dSBen Hutchings 3285874aeea5SJeff Kirsher return 0; 3286874aeea5SJeff Kirsher } 3287874aeea5SJeff Kirsher 3288874aeea5SJeff Kirsher static int efx_pm_thaw(struct device *dev) 3289874aeea5SJeff Kirsher { 3290261e4d96SJon Cooper int rc; 3291874aeea5SJeff Kirsher struct efx_nic *efx = pci_get_drvdata(to_pci_dev(dev)); 3292874aeea5SJeff Kirsher 329361da026dSBen Hutchings rtnl_lock(); 329461da026dSBen Hutchings 32956032fb56SBen Hutchings if (efx->state != STATE_DISABLED) { 3296261e4d96SJon Cooper rc = efx_enable_interrupts(efx); 3297261e4d96SJon Cooper if (rc) 3298261e4d96SJon Cooper goto fail; 3299874aeea5SJeff Kirsher 3300874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 3301874aeea5SJeff Kirsher efx->phy_op->reconfigure(efx); 3302874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 3303874aeea5SJeff Kirsher 3304874aeea5SJeff Kirsher efx_start_all(efx); 3305874aeea5SJeff Kirsher 3306874aeea5SJeff Kirsher netif_device_attach(efx->net_dev); 3307874aeea5SJeff Kirsher 3308f16aeea0SBen Hutchings efx->state = STATE_READY; 3309874aeea5SJeff Kirsher 3310874aeea5SJeff Kirsher efx->type->resume_wol(efx); 33116032fb56SBen Hutchings } 3312874aeea5SJeff Kirsher 331361da026dSBen Hutchings rtnl_unlock(); 331461da026dSBen Hutchings 3315874aeea5SJeff Kirsher /* Reschedule any quenched resets scheduled during efx_pm_freeze() */ 3316874aeea5SJeff Kirsher queue_work(reset_workqueue, &efx->reset_work); 3317874aeea5SJeff Kirsher 3318874aeea5SJeff Kirsher return 0; 3319261e4d96SJon Cooper 3320261e4d96SJon Cooper fail: 3321261e4d96SJon Cooper rtnl_unlock(); 3322261e4d96SJon Cooper 3323261e4d96SJon Cooper return rc; 3324874aeea5SJeff Kirsher } 3325874aeea5SJeff Kirsher 3326874aeea5SJeff Kirsher static int efx_pm_poweroff(struct device *dev) 3327874aeea5SJeff Kirsher { 3328874aeea5SJeff Kirsher struct pci_dev *pci_dev = to_pci_dev(dev); 3329874aeea5SJeff Kirsher struct efx_nic *efx = pci_get_drvdata(pci_dev); 3330874aeea5SJeff Kirsher 3331874aeea5SJeff Kirsher efx->type->fini(efx); 3332874aeea5SJeff Kirsher 3333874aeea5SJeff Kirsher efx->reset_pending = 0; 3334874aeea5SJeff Kirsher 3335874aeea5SJeff Kirsher pci_save_state(pci_dev); 3336874aeea5SJeff Kirsher return pci_set_power_state(pci_dev, PCI_D3hot); 3337874aeea5SJeff Kirsher } 3338874aeea5SJeff Kirsher 3339874aeea5SJeff Kirsher /* Used for both resume and restore */ 3340874aeea5SJeff Kirsher static int efx_pm_resume(struct device *dev) 3341874aeea5SJeff Kirsher { 3342874aeea5SJeff Kirsher struct pci_dev *pci_dev = to_pci_dev(dev); 3343874aeea5SJeff Kirsher struct efx_nic *efx = pci_get_drvdata(pci_dev); 3344874aeea5SJeff Kirsher int rc; 3345874aeea5SJeff Kirsher 3346874aeea5SJeff Kirsher rc = pci_set_power_state(pci_dev, PCI_D0); 3347874aeea5SJeff Kirsher if (rc) 3348874aeea5SJeff Kirsher return rc; 3349874aeea5SJeff Kirsher pci_restore_state(pci_dev); 3350874aeea5SJeff Kirsher rc = pci_enable_device(pci_dev); 3351874aeea5SJeff Kirsher if (rc) 3352874aeea5SJeff Kirsher return rc; 3353874aeea5SJeff Kirsher pci_set_master(efx->pci_dev); 3354874aeea5SJeff Kirsher rc = efx->type->reset(efx, RESET_TYPE_ALL); 3355874aeea5SJeff Kirsher if (rc) 3356874aeea5SJeff Kirsher return rc; 3357874aeea5SJeff Kirsher rc = efx->type->init(efx); 3358874aeea5SJeff Kirsher if (rc) 3359874aeea5SJeff Kirsher return rc; 3360261e4d96SJon Cooper rc = efx_pm_thaw(dev); 3361261e4d96SJon Cooper return rc; 3362874aeea5SJeff Kirsher } 3363874aeea5SJeff Kirsher 3364874aeea5SJeff Kirsher static int efx_pm_suspend(struct device *dev) 3365874aeea5SJeff Kirsher { 3366874aeea5SJeff Kirsher int rc; 3367874aeea5SJeff Kirsher 3368874aeea5SJeff Kirsher efx_pm_freeze(dev); 3369874aeea5SJeff Kirsher rc = efx_pm_poweroff(dev); 3370874aeea5SJeff Kirsher if (rc) 3371874aeea5SJeff Kirsher efx_pm_resume(dev); 3372874aeea5SJeff Kirsher return rc; 3373874aeea5SJeff Kirsher } 3374874aeea5SJeff Kirsher 337518e83e4cSBen Hutchings static const struct dev_pm_ops efx_pm_ops = { 3376874aeea5SJeff Kirsher .suspend = efx_pm_suspend, 3377874aeea5SJeff Kirsher .resume = efx_pm_resume, 3378874aeea5SJeff Kirsher .freeze = efx_pm_freeze, 3379874aeea5SJeff Kirsher .thaw = efx_pm_thaw, 3380874aeea5SJeff Kirsher .poweroff = efx_pm_poweroff, 3381874aeea5SJeff Kirsher .restore = efx_pm_resume, 3382874aeea5SJeff Kirsher }; 3383874aeea5SJeff Kirsher 3384626950dbSAlexandre Rames /* A PCI error affecting this device was detected. 3385626950dbSAlexandre Rames * At this point MMIO and DMA may be disabled. 3386626950dbSAlexandre Rames * Stop the software path and request a slot reset. 3387626950dbSAlexandre Rames */ 3388debd0034Sstephen hemminger static pci_ers_result_t efx_io_error_detected(struct pci_dev *pdev, 3389626950dbSAlexandre Rames enum pci_channel_state state) 3390626950dbSAlexandre Rames { 3391626950dbSAlexandre Rames pci_ers_result_t status = PCI_ERS_RESULT_RECOVERED; 3392626950dbSAlexandre Rames struct efx_nic *efx = pci_get_drvdata(pdev); 3393626950dbSAlexandre Rames 3394626950dbSAlexandre Rames if (state == pci_channel_io_perm_failure) 3395626950dbSAlexandre Rames return PCI_ERS_RESULT_DISCONNECT; 3396626950dbSAlexandre Rames 3397626950dbSAlexandre Rames rtnl_lock(); 3398626950dbSAlexandre Rames 3399626950dbSAlexandre Rames if (efx->state != STATE_DISABLED) { 3400626950dbSAlexandre Rames efx->state = STATE_RECOVERY; 3401626950dbSAlexandre Rames efx->reset_pending = 0; 3402626950dbSAlexandre Rames 3403626950dbSAlexandre Rames efx_device_detach_sync(efx); 3404626950dbSAlexandre Rames 3405626950dbSAlexandre Rames efx_stop_all(efx); 3406d8291187SBen Hutchings efx_disable_interrupts(efx); 3407626950dbSAlexandre Rames 3408626950dbSAlexandre Rames status = PCI_ERS_RESULT_NEED_RESET; 3409626950dbSAlexandre Rames } else { 3410626950dbSAlexandre Rames /* If the interface is disabled we don't want to do anything 3411626950dbSAlexandre Rames * with it. 3412626950dbSAlexandre Rames */ 3413626950dbSAlexandre Rames status = PCI_ERS_RESULT_RECOVERED; 3414626950dbSAlexandre Rames } 3415626950dbSAlexandre Rames 3416626950dbSAlexandre Rames rtnl_unlock(); 3417626950dbSAlexandre Rames 3418626950dbSAlexandre Rames pci_disable_device(pdev); 3419626950dbSAlexandre Rames 3420626950dbSAlexandre Rames return status; 3421626950dbSAlexandre Rames } 3422626950dbSAlexandre Rames 3423dbedd44eSJoe Perches /* Fake a successful reset, which will be performed later in efx_io_resume. */ 3424debd0034Sstephen hemminger static pci_ers_result_t efx_io_slot_reset(struct pci_dev *pdev) 3425626950dbSAlexandre Rames { 3426626950dbSAlexandre Rames struct efx_nic *efx = pci_get_drvdata(pdev); 3427626950dbSAlexandre Rames pci_ers_result_t status = PCI_ERS_RESULT_RECOVERED; 3428626950dbSAlexandre Rames int rc; 3429626950dbSAlexandre Rames 3430626950dbSAlexandre Rames if (pci_enable_device(pdev)) { 3431626950dbSAlexandre Rames netif_err(efx, hw, efx->net_dev, 3432626950dbSAlexandre Rames "Cannot re-enable PCI device after reset.\n"); 3433626950dbSAlexandre Rames status = PCI_ERS_RESULT_DISCONNECT; 3434626950dbSAlexandre Rames } 3435626950dbSAlexandre Rames 3436626950dbSAlexandre Rames rc = pci_cleanup_aer_uncorrect_error_status(pdev); 3437626950dbSAlexandre Rames if (rc) { 3438626950dbSAlexandre Rames netif_err(efx, hw, efx->net_dev, 3439626950dbSAlexandre Rames "pci_cleanup_aer_uncorrect_error_status failed (%d)\n", rc); 3440626950dbSAlexandre Rames /* Non-fatal error. Continue. */ 3441626950dbSAlexandre Rames } 3442626950dbSAlexandre Rames 3443626950dbSAlexandre Rames return status; 3444626950dbSAlexandre Rames } 3445626950dbSAlexandre Rames 3446626950dbSAlexandre Rames /* Perform the actual reset and resume I/O operations. */ 3447626950dbSAlexandre Rames static void efx_io_resume(struct pci_dev *pdev) 3448626950dbSAlexandre Rames { 3449626950dbSAlexandre Rames struct efx_nic *efx = pci_get_drvdata(pdev); 3450626950dbSAlexandre Rames int rc; 3451626950dbSAlexandre Rames 3452626950dbSAlexandre Rames rtnl_lock(); 3453626950dbSAlexandre Rames 3454626950dbSAlexandre Rames if (efx->state == STATE_DISABLED) 3455626950dbSAlexandre Rames goto out; 3456626950dbSAlexandre Rames 3457626950dbSAlexandre Rames rc = efx_reset(efx, RESET_TYPE_ALL); 3458626950dbSAlexandre Rames if (rc) { 3459626950dbSAlexandre Rames netif_err(efx, hw, efx->net_dev, 3460626950dbSAlexandre Rames "efx_reset failed after PCI error (%d)\n", rc); 3461626950dbSAlexandre Rames } else { 3462626950dbSAlexandre Rames efx->state = STATE_READY; 3463626950dbSAlexandre Rames netif_dbg(efx, hw, efx->net_dev, 3464626950dbSAlexandre Rames "Done resetting and resuming IO after PCI error.\n"); 3465626950dbSAlexandre Rames } 3466626950dbSAlexandre Rames 3467626950dbSAlexandre Rames out: 3468626950dbSAlexandre Rames rtnl_unlock(); 3469626950dbSAlexandre Rames } 3470626950dbSAlexandre Rames 3471626950dbSAlexandre Rames /* For simplicity and reliability, we always require a slot reset and try to 3472626950dbSAlexandre Rames * reset the hardware when a pci error affecting the device is detected. 3473626950dbSAlexandre Rames * We leave both the link_reset and mmio_enabled callback unimplemented: 3474626950dbSAlexandre Rames * with our request for slot reset the mmio_enabled callback will never be 3475626950dbSAlexandre Rames * called, and the link_reset callback is not used by AER or EEH mechanisms. 3476626950dbSAlexandre Rames */ 3477c300366bSJulia Lawall static const struct pci_error_handlers efx_err_handlers = { 3478626950dbSAlexandre Rames .error_detected = efx_io_error_detected, 3479626950dbSAlexandre Rames .slot_reset = efx_io_slot_reset, 3480626950dbSAlexandre Rames .resume = efx_io_resume, 3481626950dbSAlexandre Rames }; 3482626950dbSAlexandre Rames 3483874aeea5SJeff Kirsher static struct pci_driver efx_pci_driver = { 3484874aeea5SJeff Kirsher .name = KBUILD_MODNAME, 3485874aeea5SJeff Kirsher .id_table = efx_pci_table, 3486874aeea5SJeff Kirsher .probe = efx_pci_probe, 3487874aeea5SJeff Kirsher .remove = efx_pci_remove, 3488874aeea5SJeff Kirsher .driver.pm = &efx_pm_ops, 3489626950dbSAlexandre Rames .err_handler = &efx_err_handlers, 3490834e23ddSShradha Shah #ifdef CONFIG_SFC_SRIOV 3491834e23ddSShradha Shah .sriov_configure = efx_pci_sriov_configure, 3492834e23ddSShradha Shah #endif 3493874aeea5SJeff Kirsher }; 3494874aeea5SJeff Kirsher 3495874aeea5SJeff Kirsher /************************************************************************** 3496874aeea5SJeff Kirsher * 3497874aeea5SJeff Kirsher * Kernel module interface 3498874aeea5SJeff Kirsher * 3499874aeea5SJeff Kirsher *************************************************************************/ 3500874aeea5SJeff Kirsher 3501874aeea5SJeff Kirsher module_param(interrupt_mode, uint, 0444); 3502874aeea5SJeff Kirsher MODULE_PARM_DESC(interrupt_mode, 3503874aeea5SJeff Kirsher "Interrupt mode (0=>MSIX 1=>MSI 2=>legacy)"); 3504874aeea5SJeff Kirsher 3505874aeea5SJeff Kirsher static int __init efx_init_module(void) 3506874aeea5SJeff Kirsher { 3507874aeea5SJeff Kirsher int rc; 3508874aeea5SJeff Kirsher 3509874aeea5SJeff Kirsher printk(KERN_INFO "Solarflare NET driver v" EFX_DRIVER_VERSION "\n"); 3510874aeea5SJeff Kirsher 3511874aeea5SJeff Kirsher rc = register_netdevice_notifier(&efx_netdev_notifier); 3512874aeea5SJeff Kirsher if (rc) 3513874aeea5SJeff Kirsher goto err_notifier; 3514874aeea5SJeff Kirsher 35157fa8d547SShradha Shah #ifdef CONFIG_SFC_SRIOV 3516cd2d5b52SBen Hutchings rc = efx_init_sriov(); 3517cd2d5b52SBen Hutchings if (rc) 3518cd2d5b52SBen Hutchings goto err_sriov; 35197fa8d547SShradha Shah #endif 3520cd2d5b52SBen Hutchings 3521874aeea5SJeff Kirsher reset_workqueue = create_singlethread_workqueue("sfc_reset"); 3522874aeea5SJeff Kirsher if (!reset_workqueue) { 3523874aeea5SJeff Kirsher rc = -ENOMEM; 3524874aeea5SJeff Kirsher goto err_reset; 3525874aeea5SJeff Kirsher } 3526874aeea5SJeff Kirsher 3527874aeea5SJeff Kirsher rc = pci_register_driver(&efx_pci_driver); 3528874aeea5SJeff Kirsher if (rc < 0) 3529874aeea5SJeff Kirsher goto err_pci; 3530874aeea5SJeff Kirsher 3531874aeea5SJeff Kirsher return 0; 3532874aeea5SJeff Kirsher 3533874aeea5SJeff Kirsher err_pci: 3534874aeea5SJeff Kirsher destroy_workqueue(reset_workqueue); 3535874aeea5SJeff Kirsher err_reset: 35367fa8d547SShradha Shah #ifdef CONFIG_SFC_SRIOV 3537cd2d5b52SBen Hutchings efx_fini_sriov(); 3538cd2d5b52SBen Hutchings err_sriov: 35397fa8d547SShradha Shah #endif 3540874aeea5SJeff Kirsher unregister_netdevice_notifier(&efx_netdev_notifier); 3541874aeea5SJeff Kirsher err_notifier: 3542874aeea5SJeff Kirsher return rc; 3543874aeea5SJeff Kirsher } 3544874aeea5SJeff Kirsher 3545874aeea5SJeff Kirsher static void __exit efx_exit_module(void) 3546874aeea5SJeff Kirsher { 3547874aeea5SJeff Kirsher printk(KERN_INFO "Solarflare NET driver unloading\n"); 3548874aeea5SJeff Kirsher 3549874aeea5SJeff Kirsher pci_unregister_driver(&efx_pci_driver); 3550874aeea5SJeff Kirsher destroy_workqueue(reset_workqueue); 35517fa8d547SShradha Shah #ifdef CONFIG_SFC_SRIOV 3552cd2d5b52SBen Hutchings efx_fini_sriov(); 35537fa8d547SShradha Shah #endif 3554874aeea5SJeff Kirsher unregister_netdevice_notifier(&efx_netdev_notifier); 3555874aeea5SJeff Kirsher 3556874aeea5SJeff Kirsher } 3557874aeea5SJeff Kirsher 3558874aeea5SJeff Kirsher module_init(efx_init_module); 3559874aeea5SJeff Kirsher module_exit(efx_exit_module); 3560874aeea5SJeff Kirsher 3561874aeea5SJeff Kirsher MODULE_AUTHOR("Solarflare Communications and " 3562874aeea5SJeff Kirsher "Michael Brown <mbrown@fensystems.co.uk>"); 35636a350fdbSBen Hutchings MODULE_DESCRIPTION("Solarflare network driver"); 3564874aeea5SJeff Kirsher MODULE_LICENSE("GPL"); 3565874aeea5SJeff Kirsher MODULE_DEVICE_TABLE(pci, efx_pci_table); 356614077e9eSEdward Cree MODULE_VERSION(EFX_DRIVER_VERSION); 3567