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" 26e5fbd977SJon Cooper #include <net/gre.h> 27e5fbd977SJon Cooper #include <net/udp_tunnel.h> 28874aeea5SJeff Kirsher #include "efx.h" 29874aeea5SJeff Kirsher #include "nic.h" 3071827443SEdward Cree #include "io.h" 31dd40781eSBen Hutchings #include "selftest.h" 327fa8d547SShradha Shah #include "sriov.h" 33874aeea5SJeff Kirsher 34874aeea5SJeff Kirsher #include "mcdi.h" 35e5fbd977SJon Cooper #include "mcdi_pcol.h" 36874aeea5SJeff Kirsher #include "workarounds.h" 37874aeea5SJeff Kirsher 38874aeea5SJeff Kirsher /************************************************************************** 39874aeea5SJeff Kirsher * 40874aeea5SJeff Kirsher * Type name strings 41874aeea5SJeff Kirsher * 42874aeea5SJeff Kirsher ************************************************************************** 43874aeea5SJeff Kirsher */ 44874aeea5SJeff Kirsher 45874aeea5SJeff Kirsher /* Loopback mode names (see LOOPBACK_MODE()) */ 46874aeea5SJeff Kirsher const unsigned int efx_loopback_mode_max = LOOPBACK_MAX; 4718e83e4cSBen Hutchings const char *const efx_loopback_mode_names[] = { 48874aeea5SJeff Kirsher [LOOPBACK_NONE] = "NONE", 49874aeea5SJeff Kirsher [LOOPBACK_DATA] = "DATAPATH", 50874aeea5SJeff Kirsher [LOOPBACK_GMAC] = "GMAC", 51874aeea5SJeff Kirsher [LOOPBACK_XGMII] = "XGMII", 52874aeea5SJeff Kirsher [LOOPBACK_XGXS] = "XGXS", 53874aeea5SJeff Kirsher [LOOPBACK_XAUI] = "XAUI", 54874aeea5SJeff Kirsher [LOOPBACK_GMII] = "GMII", 55874aeea5SJeff Kirsher [LOOPBACK_SGMII] = "SGMII", 56874aeea5SJeff Kirsher [LOOPBACK_XGBR] = "XGBR", 57874aeea5SJeff Kirsher [LOOPBACK_XFI] = "XFI", 58874aeea5SJeff Kirsher [LOOPBACK_XAUI_FAR] = "XAUI_FAR", 59874aeea5SJeff Kirsher [LOOPBACK_GMII_FAR] = "GMII_FAR", 60874aeea5SJeff Kirsher [LOOPBACK_SGMII_FAR] = "SGMII_FAR", 61874aeea5SJeff Kirsher [LOOPBACK_XFI_FAR] = "XFI_FAR", 62874aeea5SJeff Kirsher [LOOPBACK_GPHY] = "GPHY", 63874aeea5SJeff Kirsher [LOOPBACK_PHYXS] = "PHYXS", 64874aeea5SJeff Kirsher [LOOPBACK_PCS] = "PCS", 65874aeea5SJeff Kirsher [LOOPBACK_PMAPMD] = "PMA/PMD", 66874aeea5SJeff Kirsher [LOOPBACK_XPORT] = "XPORT", 67874aeea5SJeff Kirsher [LOOPBACK_XGMII_WS] = "XGMII_WS", 68874aeea5SJeff Kirsher [LOOPBACK_XAUI_WS] = "XAUI_WS", 69874aeea5SJeff Kirsher [LOOPBACK_XAUI_WS_FAR] = "XAUI_WS_FAR", 70874aeea5SJeff Kirsher [LOOPBACK_XAUI_WS_NEAR] = "XAUI_WS_NEAR", 71874aeea5SJeff Kirsher [LOOPBACK_GMII_WS] = "GMII_WS", 72874aeea5SJeff Kirsher [LOOPBACK_XFI_WS] = "XFI_WS", 73874aeea5SJeff Kirsher [LOOPBACK_XFI_WS_FAR] = "XFI_WS_FAR", 74874aeea5SJeff Kirsher [LOOPBACK_PHYXS_WS] = "PHYXS_WS", 75874aeea5SJeff Kirsher }; 76874aeea5SJeff Kirsher 77874aeea5SJeff Kirsher const unsigned int efx_reset_type_max = RESET_TYPE_MAX; 7818e83e4cSBen Hutchings const char *const efx_reset_type_names[] = { 79874aeea5SJeff Kirsher [RESET_TYPE_INVISIBLE] = "INVISIBLE", 80874aeea5SJeff Kirsher [RESET_TYPE_ALL] = "ALL", 81626950dbSAlexandre Rames [RESET_TYPE_RECOVER_OR_ALL] = "RECOVER_OR_ALL", 82874aeea5SJeff Kirsher [RESET_TYPE_WORLD] = "WORLD", 83626950dbSAlexandre Rames [RESET_TYPE_RECOVER_OR_DISABLE] = "RECOVER_OR_DISABLE", 84087e9025SJon Cooper [RESET_TYPE_DATAPATH] = "DATAPATH", 85e283546cSEdward Cree [RESET_TYPE_MC_BIST] = "MC_BIST", 86874aeea5SJeff Kirsher [RESET_TYPE_DISABLE] = "DISABLE", 87874aeea5SJeff Kirsher [RESET_TYPE_TX_WATCHDOG] = "TX_WATCHDOG", 88874aeea5SJeff Kirsher [RESET_TYPE_INT_ERROR] = "INT_ERROR", 893de82b91SAlexandre Rames [RESET_TYPE_DMA_ERROR] = "DMA_ERROR", 90874aeea5SJeff Kirsher [RESET_TYPE_TX_SKIP] = "TX_SKIP", 91874aeea5SJeff Kirsher [RESET_TYPE_MC_FAILURE] = "MC_FAILURE", 92e283546cSEdward Cree [RESET_TYPE_MCDI_TIMEOUT] = "MCDI_TIMEOUT (FLR)", 93874aeea5SJeff Kirsher }; 94874aeea5SJeff Kirsher 95e5fbd977SJon Cooper /* UDP tunnel type names */ 96e5fbd977SJon Cooper static const char *const efx_udp_tunnel_type_names[] = { 97e5fbd977SJon Cooper [TUNNEL_ENCAP_UDP_PORT_ENTRY_VXLAN] = "vxlan", 98e5fbd977SJon Cooper [TUNNEL_ENCAP_UDP_PORT_ENTRY_GENEVE] = "geneve", 99e5fbd977SJon Cooper }; 100e5fbd977SJon Cooper 101e5fbd977SJon Cooper void efx_get_udp_tunnel_type_name(u16 type, char *buf, size_t buflen) 102e5fbd977SJon Cooper { 103e5fbd977SJon Cooper if (type < ARRAY_SIZE(efx_udp_tunnel_type_names) && 104e5fbd977SJon Cooper efx_udp_tunnel_type_names[type] != NULL) 105e5fbd977SJon Cooper snprintf(buf, buflen, "%s", efx_udp_tunnel_type_names[type]); 106e5fbd977SJon Cooper else 107e5fbd977SJon Cooper snprintf(buf, buflen, "type %d", type); 108e5fbd977SJon Cooper } 109e5fbd977SJon Cooper 110874aeea5SJeff Kirsher /* Reset workqueue. If any NIC has a hardware failure then a reset will be 111874aeea5SJeff Kirsher * queued onto this work queue. This is not a per-nic work queue, because 112874aeea5SJeff Kirsher * efx_reset_work() acquires the rtnl lock, so resets are naturally serialised. 113874aeea5SJeff Kirsher */ 114874aeea5SJeff Kirsher static struct workqueue_struct *reset_workqueue; 115874aeea5SJeff Kirsher 11674cd60a4SJon Cooper /* How often and how many times to poll for a reset while waiting for a 11774cd60a4SJon Cooper * BIST that another function started to complete. 11874cd60a4SJon Cooper */ 11974cd60a4SJon Cooper #define BIST_WAIT_DELAY_MS 100 12074cd60a4SJon Cooper #define BIST_WAIT_DELAY_COUNT 100 12174cd60a4SJon Cooper 122874aeea5SJeff Kirsher /************************************************************************** 123874aeea5SJeff Kirsher * 124874aeea5SJeff Kirsher * Configurable values 125874aeea5SJeff Kirsher * 126874aeea5SJeff Kirsher *************************************************************************/ 127874aeea5SJeff Kirsher 128874aeea5SJeff Kirsher /* 129874aeea5SJeff Kirsher * Use separate channels for TX and RX events 130874aeea5SJeff Kirsher * 131874aeea5SJeff Kirsher * Set this to 1 to use separate channels for TX and RX. It allows us 132874aeea5SJeff Kirsher * to control interrupt affinity separately for TX and RX. 133874aeea5SJeff Kirsher * 134874aeea5SJeff Kirsher * This is only used in MSI-X interrupt mode 135874aeea5SJeff Kirsher */ 136b0fbdae1SShradha Shah bool efx_separate_tx_channels; 137b0fbdae1SShradha Shah module_param(efx_separate_tx_channels, bool, 0444); 138b0fbdae1SShradha Shah MODULE_PARM_DESC(efx_separate_tx_channels, 139874aeea5SJeff Kirsher "Use separate channels for TX and RX"); 140874aeea5SJeff Kirsher 141874aeea5SJeff Kirsher /* This is the weight assigned to each of the (per-channel) virtual 142874aeea5SJeff Kirsher * NAPI devices. 143874aeea5SJeff Kirsher */ 144874aeea5SJeff Kirsher static int napi_weight = 64; 145874aeea5SJeff Kirsher 146874aeea5SJeff Kirsher /* This is the time (in jiffies) between invocations of the hardware 147626950dbSAlexandre Rames * monitor. 148626950dbSAlexandre Rames * On Falcon-based NICs, this will: 149874aeea5SJeff Kirsher * - Check the on-board hardware monitor; 150874aeea5SJeff Kirsher * - Poll the link state and reconfigure the hardware as necessary. 151626950dbSAlexandre Rames * On Siena-based NICs for power systems with EEH support, this will give EEH a 152626950dbSAlexandre Rames * chance to start. 153874aeea5SJeff Kirsher */ 154874aeea5SJeff Kirsher static unsigned int efx_monitor_interval = 1 * HZ; 155874aeea5SJeff Kirsher 156874aeea5SJeff Kirsher /* Initial interrupt moderation settings. They can be modified after 157874aeea5SJeff Kirsher * module load with ethtool. 158874aeea5SJeff Kirsher * 159874aeea5SJeff Kirsher * The default for RX should strike a balance between increasing the 160874aeea5SJeff Kirsher * round-trip latency and reducing overhead. 161874aeea5SJeff Kirsher */ 162874aeea5SJeff Kirsher static unsigned int rx_irq_mod_usec = 60; 163874aeea5SJeff Kirsher 164874aeea5SJeff Kirsher /* Initial interrupt moderation settings. They can be modified after 165874aeea5SJeff Kirsher * module load with ethtool. 166874aeea5SJeff Kirsher * 167874aeea5SJeff Kirsher * This default is chosen to ensure that a 10G link does not go idle 168874aeea5SJeff Kirsher * while a TX queue is stopped after it has become full. A queue is 169874aeea5SJeff Kirsher * restarted when it drops below half full. The time this takes (assuming 170874aeea5SJeff Kirsher * worst case 3 descriptors per packet and 1024 descriptors) is 171874aeea5SJeff Kirsher * 512 / 3 * 1.2 = 205 usec. 172874aeea5SJeff Kirsher */ 173874aeea5SJeff Kirsher static unsigned int tx_irq_mod_usec = 150; 174874aeea5SJeff Kirsher 175874aeea5SJeff Kirsher /* This is the first interrupt mode to try out of: 176874aeea5SJeff Kirsher * 0 => MSI-X 177874aeea5SJeff Kirsher * 1 => MSI 178874aeea5SJeff Kirsher * 2 => legacy 179874aeea5SJeff Kirsher */ 180874aeea5SJeff Kirsher static unsigned int interrupt_mode; 181874aeea5SJeff Kirsher 182874aeea5SJeff Kirsher /* This is the requested number of CPUs to use for Receive-Side Scaling (RSS), 183874aeea5SJeff Kirsher * i.e. the number of CPUs among which we may distribute simultaneous 184874aeea5SJeff Kirsher * interrupt handling. 185874aeea5SJeff Kirsher * 186874aeea5SJeff Kirsher * Cards without MSI-X will only target one CPU via legacy or MSI interrupt. 187cdb08f8fSBen Hutchings * The default (0) means to assign an interrupt to each core. 188874aeea5SJeff Kirsher */ 189874aeea5SJeff Kirsher static unsigned int rss_cpus; 190874aeea5SJeff Kirsher module_param(rss_cpus, uint, 0444); 191874aeea5SJeff Kirsher MODULE_PARM_DESC(rss_cpus, "Number of CPUs to use for Receive-Side Scaling"); 192874aeea5SJeff Kirsher 193b9cc977dSBen Hutchings static bool phy_flash_cfg; 194b9cc977dSBen Hutchings module_param(phy_flash_cfg, bool, 0644); 195874aeea5SJeff Kirsher MODULE_PARM_DESC(phy_flash_cfg, "Set PHYs into reflash mode initially"); 196874aeea5SJeff Kirsher 197e7bed9c8SBen Hutchings static unsigned irq_adapt_low_thresh = 8000; 198874aeea5SJeff Kirsher module_param(irq_adapt_low_thresh, uint, 0644); 199874aeea5SJeff Kirsher MODULE_PARM_DESC(irq_adapt_low_thresh, 200874aeea5SJeff Kirsher "Threshold score for reducing IRQ moderation"); 201874aeea5SJeff Kirsher 202e7bed9c8SBen Hutchings static unsigned irq_adapt_high_thresh = 16000; 203874aeea5SJeff Kirsher module_param(irq_adapt_high_thresh, uint, 0644); 204874aeea5SJeff Kirsher MODULE_PARM_DESC(irq_adapt_high_thresh, 205874aeea5SJeff Kirsher "Threshold score for increasing IRQ moderation"); 206874aeea5SJeff Kirsher 207874aeea5SJeff Kirsher static unsigned debug = (NETIF_MSG_DRV | NETIF_MSG_PROBE | 208874aeea5SJeff Kirsher NETIF_MSG_LINK | NETIF_MSG_IFDOWN | 209874aeea5SJeff Kirsher NETIF_MSG_IFUP | NETIF_MSG_RX_ERR | 210874aeea5SJeff Kirsher NETIF_MSG_TX_ERR | NETIF_MSG_HW); 211874aeea5SJeff Kirsher module_param(debug, uint, 0); 212874aeea5SJeff Kirsher MODULE_PARM_DESC(debug, "Bitmapped debugging message enable value"); 213874aeea5SJeff Kirsher 214874aeea5SJeff Kirsher /************************************************************************** 215874aeea5SJeff Kirsher * 216874aeea5SJeff Kirsher * Utility functions and prototypes 217874aeea5SJeff Kirsher * 218874aeea5SJeff Kirsher *************************************************************************/ 219874aeea5SJeff Kirsher 220261e4d96SJon Cooper static int efx_soft_enable_interrupts(struct efx_nic *efx); 221d8291187SBen Hutchings static void efx_soft_disable_interrupts(struct efx_nic *efx); 2227f967c01SBen Hutchings static void efx_remove_channel(struct efx_channel *channel); 223874aeea5SJeff Kirsher static void efx_remove_channels(struct efx_nic *efx); 2247f967c01SBen Hutchings static const struct efx_channel_type efx_default_channel_type; 225874aeea5SJeff Kirsher static void efx_remove_port(struct efx_nic *efx); 2267f967c01SBen Hutchings static void efx_init_napi_channel(struct efx_channel *channel); 227874aeea5SJeff Kirsher static void efx_fini_napi(struct efx_nic *efx); 228874aeea5SJeff Kirsher static void efx_fini_napi_channel(struct efx_channel *channel); 229874aeea5SJeff Kirsher static void efx_fini_struct(struct efx_nic *efx); 230874aeea5SJeff Kirsher static void efx_start_all(struct efx_nic *efx); 231874aeea5SJeff Kirsher static void efx_stop_all(struct efx_nic *efx); 232874aeea5SJeff Kirsher 233874aeea5SJeff Kirsher #define EFX_ASSERT_RESET_SERIALISED(efx) \ 234874aeea5SJeff Kirsher do { \ 235f16aeea0SBen Hutchings if ((efx->state == STATE_READY) || \ 236626950dbSAlexandre Rames (efx->state == STATE_RECOVERY) || \ 237874aeea5SJeff Kirsher (efx->state == STATE_DISABLED)) \ 238874aeea5SJeff Kirsher ASSERT_RTNL(); \ 239874aeea5SJeff Kirsher } while (0) 240874aeea5SJeff Kirsher 2418b7325b4SBen Hutchings static int efx_check_disabled(struct efx_nic *efx) 2428b7325b4SBen Hutchings { 243626950dbSAlexandre Rames if (efx->state == STATE_DISABLED || efx->state == STATE_RECOVERY) { 2448b7325b4SBen Hutchings netif_err(efx, drv, efx->net_dev, 2458b7325b4SBen Hutchings "device is disabled due to earlier errors\n"); 2468b7325b4SBen Hutchings return -EIO; 2478b7325b4SBen Hutchings } 2488b7325b4SBen Hutchings return 0; 2498b7325b4SBen Hutchings } 2508b7325b4SBen Hutchings 251874aeea5SJeff Kirsher /************************************************************************** 252874aeea5SJeff Kirsher * 253874aeea5SJeff Kirsher * Event queue processing 254874aeea5SJeff Kirsher * 255874aeea5SJeff Kirsher *************************************************************************/ 256874aeea5SJeff Kirsher 257874aeea5SJeff Kirsher /* Process channel's event queue 258874aeea5SJeff Kirsher * 259874aeea5SJeff Kirsher * This function is responsible for processing the event queue of a 260874aeea5SJeff Kirsher * single channel. The caller must guarantee that this function will 261874aeea5SJeff Kirsher * never be concurrently called more than once on the same channel, 262874aeea5SJeff Kirsher * though different channels may be being processed concurrently. 263874aeea5SJeff Kirsher */ 264874aeea5SJeff Kirsher static int efx_process_channel(struct efx_channel *channel, int budget) 265874aeea5SJeff Kirsher { 266c936835cSPeter Dunning struct efx_tx_queue *tx_queue; 267874aeea5SJeff Kirsher int spent; 268874aeea5SJeff Kirsher 2699f2cb71cSBen Hutchings if (unlikely(!channel->enabled)) 270874aeea5SJeff Kirsher return 0; 271874aeea5SJeff Kirsher 272c936835cSPeter Dunning efx_for_each_channel_tx_queue(tx_queue, channel) { 273c936835cSPeter Dunning tx_queue->pkts_compl = 0; 274c936835cSPeter Dunning tx_queue->bytes_compl = 0; 275c936835cSPeter Dunning } 276c936835cSPeter Dunning 277874aeea5SJeff Kirsher spent = efx_nic_process_eventq(channel, budget); 278d9ab7007SBen Hutchings if (spent && efx_channel_has_rx_queue(channel)) { 279d9ab7007SBen Hutchings struct efx_rx_queue *rx_queue = 280d9ab7007SBen Hutchings efx_channel_get_rx_queue(channel); 281874aeea5SJeff Kirsher 282ff734ef4SBen Hutchings efx_rx_flush_packet(channel); 283cce28794SJon Cooper efx_fast_push_rx_descriptors(rx_queue, true); 284d9ab7007SBen Hutchings } 285874aeea5SJeff Kirsher 286c936835cSPeter Dunning /* Update BQL */ 287c936835cSPeter Dunning efx_for_each_channel_tx_queue(tx_queue, channel) { 288c936835cSPeter Dunning if (tx_queue->bytes_compl) { 289c936835cSPeter Dunning netdev_tx_completed_queue(tx_queue->core_txq, 290c936835cSPeter Dunning tx_queue->pkts_compl, tx_queue->bytes_compl); 291c936835cSPeter Dunning } 292c936835cSPeter Dunning } 293c936835cSPeter Dunning 294874aeea5SJeff Kirsher return spent; 295874aeea5SJeff Kirsher } 296874aeea5SJeff Kirsher 297874aeea5SJeff Kirsher /* NAPI poll handler 298874aeea5SJeff Kirsher * 299874aeea5SJeff Kirsher * NAPI guarantees serialisation of polls of the same device, which 300874aeea5SJeff Kirsher * provides the guarantee required by efx_process_channel(). 301874aeea5SJeff Kirsher */ 302539de7c5SBert Kenward static void efx_update_irq_mod(struct efx_nic *efx, struct efx_channel *channel) 303539de7c5SBert Kenward { 304539de7c5SBert Kenward int step = efx->irq_mod_step_us; 305539de7c5SBert Kenward 306539de7c5SBert Kenward if (channel->irq_mod_score < irq_adapt_low_thresh) { 307539de7c5SBert Kenward if (channel->irq_moderation_us > step) { 308539de7c5SBert Kenward channel->irq_moderation_us -= step; 309539de7c5SBert Kenward efx->type->push_irq_moderation(channel); 310539de7c5SBert Kenward } 311539de7c5SBert Kenward } else if (channel->irq_mod_score > irq_adapt_high_thresh) { 312539de7c5SBert Kenward if (channel->irq_moderation_us < 313539de7c5SBert Kenward efx->irq_rx_moderation_us) { 314539de7c5SBert Kenward channel->irq_moderation_us += step; 315539de7c5SBert Kenward efx->type->push_irq_moderation(channel); 316539de7c5SBert Kenward } 317539de7c5SBert Kenward } 318539de7c5SBert Kenward 319539de7c5SBert Kenward channel->irq_count = 0; 320539de7c5SBert Kenward channel->irq_mod_score = 0; 321539de7c5SBert Kenward } 322539de7c5SBert Kenward 323874aeea5SJeff Kirsher static int efx_poll(struct napi_struct *napi, int budget) 324874aeea5SJeff Kirsher { 325874aeea5SJeff Kirsher struct efx_channel *channel = 326874aeea5SJeff Kirsher container_of(napi, struct efx_channel, napi_str); 327874aeea5SJeff Kirsher struct efx_nic *efx = channel->efx; 328874aeea5SJeff Kirsher int spent; 329874aeea5SJeff Kirsher 330874aeea5SJeff Kirsher netif_vdbg(efx, intr, efx->net_dev, 331874aeea5SJeff Kirsher "channel %d NAPI poll executing on CPU %d\n", 332874aeea5SJeff Kirsher channel->channel, raw_smp_processor_id()); 333874aeea5SJeff Kirsher 334874aeea5SJeff Kirsher spent = efx_process_channel(channel, budget); 335874aeea5SJeff Kirsher 336874aeea5SJeff Kirsher if (spent < budget) { 3379d9a6973SBen Hutchings if (efx_channel_has_rx_queue(channel) && 338874aeea5SJeff Kirsher efx->irq_rx_adaptive && 339874aeea5SJeff Kirsher unlikely(++channel->irq_count == 1000)) { 340539de7c5SBert Kenward efx_update_irq_mod(efx, channel); 341874aeea5SJeff Kirsher } 342874aeea5SJeff Kirsher 343874aeea5SJeff Kirsher efx_filter_rfs_expire(channel); 344874aeea5SJeff Kirsher 345874aeea5SJeff Kirsher /* There is no race here; although napi_disable() will 346874aeea5SJeff Kirsher * only wait for napi_complete(), this isn't a problem 347514bedbcSBen Hutchings * since efx_nic_eventq_read_ack() will have no effect if 348874aeea5SJeff Kirsher * interrupts have already been disabled. 349874aeea5SJeff Kirsher */ 350f820c0acSBert Kenward if (napi_complete_done(napi, spent)) 351514bedbcSBen Hutchings efx_nic_eventq_read_ack(channel); 352874aeea5SJeff Kirsher } 353874aeea5SJeff Kirsher 354874aeea5SJeff Kirsher return spent; 355874aeea5SJeff Kirsher } 356874aeea5SJeff Kirsher 357874aeea5SJeff Kirsher /* Create event queue 358874aeea5SJeff Kirsher * Event queue memory allocations are done only once. If the channel 359874aeea5SJeff Kirsher * is reset, the memory buffer will be reused; this guards against 360874aeea5SJeff Kirsher * errors during channel reset and also simplifies interrupt handling. 361874aeea5SJeff Kirsher */ 362874aeea5SJeff Kirsher static int efx_probe_eventq(struct efx_channel *channel) 363874aeea5SJeff Kirsher { 364874aeea5SJeff Kirsher struct efx_nic *efx = channel->efx; 365874aeea5SJeff Kirsher unsigned long entries; 366874aeea5SJeff Kirsher 36786ee5302SBen Hutchings netif_dbg(efx, probe, efx->net_dev, 368874aeea5SJeff Kirsher "chan %d create event queue\n", channel->channel); 369874aeea5SJeff Kirsher 370874aeea5SJeff Kirsher /* Build an event queue with room for one event per tx and rx buffer, 371874aeea5SJeff Kirsher * plus some extra for link state events and MCDI completions. */ 372874aeea5SJeff Kirsher entries = roundup_pow_of_two(efx->rxq_entries + efx->txq_entries + 128); 373e01b16a7SEdward Cree EFX_WARN_ON_PARANOID(entries > EFX_MAX_EVQ_SIZE); 374874aeea5SJeff Kirsher channel->eventq_mask = max(entries, EFX_MIN_EVQ_SIZE) - 1; 375874aeea5SJeff Kirsher 376874aeea5SJeff Kirsher return efx_nic_probe_eventq(channel); 377874aeea5SJeff Kirsher } 378874aeea5SJeff Kirsher 379874aeea5SJeff Kirsher /* Prepare channel's event queue */ 380261e4d96SJon Cooper static int efx_init_eventq(struct efx_channel *channel) 381874aeea5SJeff Kirsher { 38215acb1ceSBen Hutchings struct efx_nic *efx = channel->efx; 383261e4d96SJon Cooper int rc; 384261e4d96SJon Cooper 385261e4d96SJon Cooper EFX_WARN_ON_PARANOID(channel->eventq_init); 386261e4d96SJon Cooper 38715acb1ceSBen Hutchings netif_dbg(efx, drv, efx->net_dev, 388874aeea5SJeff Kirsher "chan %d init event queue\n", channel->channel); 389874aeea5SJeff Kirsher 390261e4d96SJon Cooper rc = efx_nic_init_eventq(channel); 391261e4d96SJon Cooper if (rc == 0) { 39215acb1ceSBen Hutchings efx->type->push_irq_moderation(channel); 393874aeea5SJeff Kirsher channel->eventq_read_ptr = 0; 394be3fc09cSBen Hutchings channel->eventq_init = true; 395874aeea5SJeff Kirsher } 396261e4d96SJon Cooper return rc; 397261e4d96SJon Cooper } 398874aeea5SJeff Kirsher 3999f2cb71cSBen Hutchings /* Enable event queue processing and NAPI */ 40036763266SAlexandre Rames void efx_start_eventq(struct efx_channel *channel) 4019f2cb71cSBen Hutchings { 4029f2cb71cSBen Hutchings netif_dbg(channel->efx, ifup, channel->efx->net_dev, 4039f2cb71cSBen Hutchings "chan %d start event queue\n", channel->channel); 4049f2cb71cSBen Hutchings 405514bedbcSBen Hutchings /* Make sure the NAPI handler sees the enabled flag set */ 4069f2cb71cSBen Hutchings channel->enabled = true; 4079f2cb71cSBen Hutchings smp_wmb(); 4089f2cb71cSBen Hutchings 4099f2cb71cSBen Hutchings napi_enable(&channel->napi_str); 4109f2cb71cSBen Hutchings efx_nic_eventq_read_ack(channel); 4119f2cb71cSBen Hutchings } 4129f2cb71cSBen Hutchings 4139f2cb71cSBen Hutchings /* Disable event queue processing and NAPI */ 41436763266SAlexandre Rames void efx_stop_eventq(struct efx_channel *channel) 4159f2cb71cSBen Hutchings { 4169f2cb71cSBen Hutchings if (!channel->enabled) 4179f2cb71cSBen Hutchings return; 4189f2cb71cSBen Hutchings 4199f2cb71cSBen Hutchings napi_disable(&channel->napi_str); 4209f2cb71cSBen Hutchings channel->enabled = false; 4219f2cb71cSBen Hutchings } 4229f2cb71cSBen Hutchings 423874aeea5SJeff Kirsher static void efx_fini_eventq(struct efx_channel *channel) 424874aeea5SJeff Kirsher { 425be3fc09cSBen Hutchings if (!channel->eventq_init) 426be3fc09cSBen Hutchings return; 427be3fc09cSBen Hutchings 428874aeea5SJeff Kirsher netif_dbg(channel->efx, drv, channel->efx->net_dev, 429874aeea5SJeff Kirsher "chan %d fini event queue\n", channel->channel); 430874aeea5SJeff Kirsher 431874aeea5SJeff Kirsher efx_nic_fini_eventq(channel); 432be3fc09cSBen Hutchings channel->eventq_init = false; 433874aeea5SJeff Kirsher } 434874aeea5SJeff Kirsher 435874aeea5SJeff Kirsher static void efx_remove_eventq(struct efx_channel *channel) 436874aeea5SJeff Kirsher { 437874aeea5SJeff Kirsher netif_dbg(channel->efx, drv, channel->efx->net_dev, 438874aeea5SJeff Kirsher "chan %d remove event queue\n", channel->channel); 439874aeea5SJeff Kirsher 440874aeea5SJeff Kirsher efx_nic_remove_eventq(channel); 441874aeea5SJeff Kirsher } 442874aeea5SJeff Kirsher 443874aeea5SJeff Kirsher /************************************************************************** 444874aeea5SJeff Kirsher * 445874aeea5SJeff Kirsher * Channel handling 446874aeea5SJeff Kirsher * 447874aeea5SJeff Kirsher *************************************************************************/ 448874aeea5SJeff Kirsher 4497f967c01SBen Hutchings /* Allocate and initialise a channel structure. */ 450874aeea5SJeff Kirsher static struct efx_channel * 451874aeea5SJeff Kirsher efx_alloc_channel(struct efx_nic *efx, int i, struct efx_channel *old_channel) 452874aeea5SJeff Kirsher { 453874aeea5SJeff Kirsher struct efx_channel *channel; 454874aeea5SJeff Kirsher struct efx_rx_queue *rx_queue; 455874aeea5SJeff Kirsher struct efx_tx_queue *tx_queue; 456874aeea5SJeff Kirsher int j; 457874aeea5SJeff Kirsher 4587f967c01SBen Hutchings channel = kzalloc(sizeof(*channel), GFP_KERNEL); 4597f967c01SBen Hutchings if (!channel) 4607f967c01SBen Hutchings return NULL; 4617f967c01SBen Hutchings 4627f967c01SBen Hutchings channel->efx = efx; 4637f967c01SBen Hutchings channel->channel = i; 4647f967c01SBen Hutchings channel->type = &efx_default_channel_type; 4657f967c01SBen Hutchings 4667f967c01SBen Hutchings for (j = 0; j < EFX_TXQ_TYPES; j++) { 4677f967c01SBen Hutchings tx_queue = &channel->tx_queue[j]; 4687f967c01SBen Hutchings tx_queue->efx = efx; 4697f967c01SBen Hutchings tx_queue->queue = i * EFX_TXQ_TYPES + j; 4707f967c01SBen Hutchings tx_queue->channel = channel; 4717f967c01SBen Hutchings } 4727f967c01SBen Hutchings 4737f967c01SBen Hutchings rx_queue = &channel->rx_queue; 4747f967c01SBen Hutchings rx_queue->efx = efx; 4757aa1402eSKees Cook timer_setup(&rx_queue->slow_fill, efx_rx_slow_fill, 0); 4767f967c01SBen Hutchings 4777f967c01SBen Hutchings return channel; 4787f967c01SBen Hutchings } 4797f967c01SBen Hutchings 4807f967c01SBen Hutchings /* Allocate and initialise a channel structure, copying parameters 4817f967c01SBen Hutchings * (but not resources) from an old channel structure. 4827f967c01SBen Hutchings */ 4837f967c01SBen Hutchings static struct efx_channel * 4847f967c01SBen Hutchings efx_copy_channel(const struct efx_channel *old_channel) 4857f967c01SBen Hutchings { 4867f967c01SBen Hutchings struct efx_channel *channel; 4877f967c01SBen Hutchings struct efx_rx_queue *rx_queue; 4887f967c01SBen Hutchings struct efx_tx_queue *tx_queue; 4897f967c01SBen Hutchings int j; 4907f967c01SBen Hutchings 491874aeea5SJeff Kirsher channel = kmalloc(sizeof(*channel), GFP_KERNEL); 492874aeea5SJeff Kirsher if (!channel) 493874aeea5SJeff Kirsher return NULL; 494874aeea5SJeff Kirsher 495874aeea5SJeff Kirsher *channel = *old_channel; 496874aeea5SJeff Kirsher 497874aeea5SJeff Kirsher channel->napi_dev = NULL; 49846d054f8SBert Kenward INIT_HLIST_NODE(&channel->napi_str.napi_hash_node); 49946d054f8SBert Kenward channel->napi_str.napi_id = 0; 50046d054f8SBert Kenward channel->napi_str.state = 0; 501874aeea5SJeff Kirsher memset(&channel->eventq, 0, sizeof(channel->eventq)); 502874aeea5SJeff Kirsher 503874aeea5SJeff Kirsher for (j = 0; j < EFX_TXQ_TYPES; j++) { 504874aeea5SJeff Kirsher tx_queue = &channel->tx_queue[j]; 505874aeea5SJeff Kirsher if (tx_queue->channel) 506874aeea5SJeff Kirsher tx_queue->channel = channel; 507874aeea5SJeff Kirsher tx_queue->buffer = NULL; 508874aeea5SJeff Kirsher memset(&tx_queue->txd, 0, sizeof(tx_queue->txd)); 509874aeea5SJeff Kirsher } 510874aeea5SJeff Kirsher 511874aeea5SJeff Kirsher rx_queue = &channel->rx_queue; 5127f967c01SBen Hutchings rx_queue->buffer = NULL; 5137f967c01SBen Hutchings memset(&rx_queue->rxd, 0, sizeof(rx_queue->rxd)); 5147aa1402eSKees Cook timer_setup(&rx_queue->slow_fill, efx_rx_slow_fill, 0); 515874aeea5SJeff Kirsher 516874aeea5SJeff Kirsher return channel; 517874aeea5SJeff Kirsher } 518874aeea5SJeff Kirsher 519874aeea5SJeff Kirsher static int efx_probe_channel(struct efx_channel *channel) 520874aeea5SJeff Kirsher { 521874aeea5SJeff Kirsher struct efx_tx_queue *tx_queue; 522874aeea5SJeff Kirsher struct efx_rx_queue *rx_queue; 523874aeea5SJeff Kirsher int rc; 524874aeea5SJeff Kirsher 525874aeea5SJeff Kirsher netif_dbg(channel->efx, probe, channel->efx->net_dev, 526874aeea5SJeff Kirsher "creating channel %d\n", channel->channel); 527874aeea5SJeff Kirsher 5287f967c01SBen Hutchings rc = channel->type->pre_probe(channel); 5297f967c01SBen Hutchings if (rc) 5307f967c01SBen Hutchings goto fail; 5317f967c01SBen Hutchings 532874aeea5SJeff Kirsher rc = efx_probe_eventq(channel); 533874aeea5SJeff Kirsher if (rc) 5347f967c01SBen Hutchings goto fail; 535874aeea5SJeff Kirsher 536874aeea5SJeff Kirsher efx_for_each_channel_tx_queue(tx_queue, channel) { 537874aeea5SJeff Kirsher rc = efx_probe_tx_queue(tx_queue); 538874aeea5SJeff Kirsher if (rc) 5397f967c01SBen Hutchings goto fail; 540874aeea5SJeff Kirsher } 541874aeea5SJeff Kirsher 542874aeea5SJeff Kirsher efx_for_each_channel_rx_queue(rx_queue, channel) { 543874aeea5SJeff Kirsher rc = efx_probe_rx_queue(rx_queue); 544874aeea5SJeff Kirsher if (rc) 5457f967c01SBen Hutchings goto fail; 546874aeea5SJeff Kirsher } 547874aeea5SJeff Kirsher 548874aeea5SJeff Kirsher return 0; 549874aeea5SJeff Kirsher 5507f967c01SBen Hutchings fail: 5517f967c01SBen Hutchings efx_remove_channel(channel); 552874aeea5SJeff Kirsher return rc; 553874aeea5SJeff Kirsher } 554874aeea5SJeff Kirsher 5557f967c01SBen Hutchings static void 5567f967c01SBen Hutchings efx_get_channel_name(struct efx_channel *channel, char *buf, size_t len) 5577f967c01SBen Hutchings { 5587f967c01SBen Hutchings struct efx_nic *efx = channel->efx; 5597f967c01SBen Hutchings const char *type; 5607f967c01SBen Hutchings int number; 5617f967c01SBen Hutchings 5627f967c01SBen Hutchings number = channel->channel; 5637f967c01SBen Hutchings if (efx->tx_channel_offset == 0) { 5647f967c01SBen Hutchings type = ""; 5657f967c01SBen Hutchings } else if (channel->channel < efx->tx_channel_offset) { 5667f967c01SBen Hutchings type = "-rx"; 5677f967c01SBen Hutchings } else { 5687f967c01SBen Hutchings type = "-tx"; 5697f967c01SBen Hutchings number -= efx->tx_channel_offset; 5707f967c01SBen Hutchings } 5717f967c01SBen Hutchings snprintf(buf, len, "%s%s-%d", efx->name, type, number); 5727f967c01SBen Hutchings } 573874aeea5SJeff Kirsher 574874aeea5SJeff Kirsher static void efx_set_channel_names(struct efx_nic *efx) 575874aeea5SJeff Kirsher { 576874aeea5SJeff Kirsher struct efx_channel *channel; 577874aeea5SJeff Kirsher 5787f967c01SBen Hutchings efx_for_each_channel(channel, efx) 5797f967c01SBen Hutchings channel->type->get_name(channel, 580d8291187SBen Hutchings efx->msi_context[channel->channel].name, 581d8291187SBen Hutchings sizeof(efx->msi_context[0].name)); 582874aeea5SJeff Kirsher } 583874aeea5SJeff Kirsher 584874aeea5SJeff Kirsher static int efx_probe_channels(struct efx_nic *efx) 585874aeea5SJeff Kirsher { 586874aeea5SJeff Kirsher struct efx_channel *channel; 587874aeea5SJeff Kirsher int rc; 588874aeea5SJeff Kirsher 589874aeea5SJeff Kirsher /* Restart special buffer allocation */ 590874aeea5SJeff Kirsher efx->next_buffer_table = 0; 591874aeea5SJeff Kirsher 592c92aaff1SBen Hutchings /* Probe channels in reverse, so that any 'extra' channels 593c92aaff1SBen Hutchings * use the start of the buffer table. This allows the traffic 594c92aaff1SBen Hutchings * channels to be resized without moving them or wasting the 595c92aaff1SBen Hutchings * entries before them. 596c92aaff1SBen Hutchings */ 597c92aaff1SBen Hutchings efx_for_each_channel_rev(channel, efx) { 598874aeea5SJeff Kirsher rc = efx_probe_channel(channel); 599874aeea5SJeff Kirsher if (rc) { 600874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 601874aeea5SJeff Kirsher "failed to create channel %d\n", 602874aeea5SJeff Kirsher channel->channel); 603874aeea5SJeff Kirsher goto fail; 604874aeea5SJeff Kirsher } 605874aeea5SJeff Kirsher } 606874aeea5SJeff Kirsher efx_set_channel_names(efx); 607874aeea5SJeff Kirsher 608874aeea5SJeff Kirsher return 0; 609874aeea5SJeff Kirsher 610874aeea5SJeff Kirsher fail: 611874aeea5SJeff Kirsher efx_remove_channels(efx); 612874aeea5SJeff Kirsher return rc; 613874aeea5SJeff Kirsher } 614874aeea5SJeff Kirsher 615874aeea5SJeff Kirsher /* Channels are shutdown and reinitialised whilst the NIC is running 616874aeea5SJeff Kirsher * to propagate configuration changes (mtu, checksum offload), or 617874aeea5SJeff Kirsher * to clear hardware error conditions 618874aeea5SJeff Kirsher */ 6199f2cb71cSBen Hutchings static void efx_start_datapath(struct efx_nic *efx) 620874aeea5SJeff Kirsher { 621ebfcd0fdSAndrew Rybchenko netdev_features_t old_features = efx->net_dev->features; 62285740cdfSBen Hutchings bool old_rx_scatter = efx->rx_scatter; 623874aeea5SJeff Kirsher struct efx_tx_queue *tx_queue; 624874aeea5SJeff Kirsher struct efx_rx_queue *rx_queue; 625874aeea5SJeff Kirsher struct efx_channel *channel; 62685740cdfSBen Hutchings size_t rx_buf_len; 627874aeea5SJeff Kirsher 628874aeea5SJeff Kirsher /* Calculate the rx buffer allocation parameters required to 629874aeea5SJeff Kirsher * support the current MTU, including padding for header 630874aeea5SJeff Kirsher * alignment and overruns. 631874aeea5SJeff Kirsher */ 63243a3739dSJon Cooper efx->rx_dma_len = (efx->rx_prefix_size + 633874aeea5SJeff Kirsher EFX_MAX_FRAME_LEN(efx->net_dev->mtu) + 634874aeea5SJeff Kirsher efx->type->rx_buffer_padding); 63585740cdfSBen Hutchings rx_buf_len = (sizeof(struct efx_rx_page_state) + 6362ec03014SAndrew Rybchenko efx->rx_ip_align + efx->rx_dma_len); 63785740cdfSBen Hutchings if (rx_buf_len <= PAGE_SIZE) { 638e8c68c0aSJon Cooper efx->rx_scatter = efx->type->always_rx_scatter; 63985740cdfSBen Hutchings efx->rx_buffer_order = 0; 64085740cdfSBen Hutchings } else if (efx->type->can_rx_scatter) { 641950c54dfSBen Hutchings BUILD_BUG_ON(EFX_RX_USR_BUF_SIZE % L1_CACHE_BYTES); 64285740cdfSBen Hutchings BUILD_BUG_ON(sizeof(struct efx_rx_page_state) + 643950c54dfSBen Hutchings 2 * ALIGN(NET_IP_ALIGN + EFX_RX_USR_BUF_SIZE, 644950c54dfSBen Hutchings EFX_RX_BUF_ALIGNMENT) > 645950c54dfSBen Hutchings PAGE_SIZE); 64685740cdfSBen Hutchings efx->rx_scatter = true; 64785740cdfSBen Hutchings efx->rx_dma_len = EFX_RX_USR_BUF_SIZE; 64885740cdfSBen Hutchings efx->rx_buffer_order = 0; 64985740cdfSBen Hutchings } else { 65085740cdfSBen Hutchings efx->rx_scatter = false; 65185740cdfSBen Hutchings efx->rx_buffer_order = get_order(rx_buf_len); 65285740cdfSBen Hutchings } 65385740cdfSBen Hutchings 6541648a23fSDaniel Pieczko efx_rx_config_page_split(efx); 6551648a23fSDaniel Pieczko if (efx->rx_buffer_order) 6561648a23fSDaniel Pieczko netif_dbg(efx, drv, efx->net_dev, 6571648a23fSDaniel Pieczko "RX buf len=%u; page order=%u batch=%u\n", 6581648a23fSDaniel Pieczko efx->rx_dma_len, efx->rx_buffer_order, 6591648a23fSDaniel Pieczko efx->rx_pages_per_batch); 6601648a23fSDaniel Pieczko else 6611648a23fSDaniel Pieczko netif_dbg(efx, drv, efx->net_dev, 6621648a23fSDaniel Pieczko "RX buf len=%u step=%u bpp=%u; page batch=%u\n", 6631648a23fSDaniel Pieczko efx->rx_dma_len, efx->rx_page_buf_step, 6641648a23fSDaniel Pieczko efx->rx_bufs_per_page, efx->rx_pages_per_batch); 6652768935aSDaniel Pieczko 666ebfcd0fdSAndrew Rybchenko /* Restore previously fixed features in hw_features and remove 667ebfcd0fdSAndrew Rybchenko * features which are fixed now 668ebfcd0fdSAndrew Rybchenko */ 669ebfcd0fdSAndrew Rybchenko efx->net_dev->hw_features |= efx->net_dev->features; 670ebfcd0fdSAndrew Rybchenko efx->net_dev->hw_features &= ~efx->fixed_features; 671ebfcd0fdSAndrew Rybchenko efx->net_dev->features |= efx->fixed_features; 672ebfcd0fdSAndrew Rybchenko if (efx->net_dev->features != old_features) 673ebfcd0fdSAndrew Rybchenko netdev_features_change(efx->net_dev); 674ebfcd0fdSAndrew Rybchenko 675e8c68c0aSJon Cooper /* RX filters may also have scatter-enabled flags */ 67685740cdfSBen Hutchings if (efx->rx_scatter != old_rx_scatter) 677add72477SBen Hutchings efx->type->filter_update_rx_scatter(efx); 678874aeea5SJeff Kirsher 67914bf718fSBen Hutchings /* We must keep at least one descriptor in a TX ring empty. 68014bf718fSBen Hutchings * We could avoid this when the queue size does not exactly 68114bf718fSBen Hutchings * match the hardware ring size, but it's not that important. 68214bf718fSBen Hutchings * Therefore we stop the queue when one more skb might fill 68314bf718fSBen Hutchings * the ring completely. We wake it when half way back to 68414bf718fSBen Hutchings * empty. 68514bf718fSBen Hutchings */ 68614bf718fSBen Hutchings efx->txq_stop_thresh = efx->txq_entries - efx_tx_max_skb_descs(efx); 68714bf718fSBen Hutchings efx->txq_wake_thresh = efx->txq_stop_thresh / 2; 68814bf718fSBen Hutchings 689874aeea5SJeff Kirsher /* Initialise the channels */ 690874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) { 6913881d8abSAlexandre Rames efx_for_each_channel_tx_queue(tx_queue, channel) { 692874aeea5SJeff Kirsher efx_init_tx_queue(tx_queue); 6933881d8abSAlexandre Rames atomic_inc(&efx->active_queues); 6943881d8abSAlexandre Rames } 695874aeea5SJeff Kirsher 6969f2cb71cSBen Hutchings efx_for_each_channel_rx_queue(rx_queue, channel) { 697874aeea5SJeff Kirsher efx_init_rx_queue(rx_queue); 6983881d8abSAlexandre Rames atomic_inc(&efx->active_queues); 699cce28794SJon Cooper efx_stop_eventq(channel); 700cce28794SJon Cooper efx_fast_push_rx_descriptors(rx_queue, false); 701cce28794SJon Cooper efx_start_eventq(channel); 7029f2cb71cSBen Hutchings } 703874aeea5SJeff Kirsher 70485740cdfSBen Hutchings WARN_ON(channel->rx_pkt_n_frags); 705874aeea5SJeff Kirsher } 7069f2cb71cSBen Hutchings 7072ea4dc28SAlexandre Rames efx_ptp_start_datapath(efx); 7082ea4dc28SAlexandre Rames 7099f2cb71cSBen Hutchings if (netif_device_present(efx->net_dev)) 7109f2cb71cSBen Hutchings netif_tx_wake_all_queues(efx->net_dev); 711874aeea5SJeff Kirsher } 712874aeea5SJeff Kirsher 7139f2cb71cSBen Hutchings static void efx_stop_datapath(struct efx_nic *efx) 714874aeea5SJeff Kirsher { 715874aeea5SJeff Kirsher struct efx_channel *channel; 716874aeea5SJeff Kirsher struct efx_tx_queue *tx_queue; 717874aeea5SJeff Kirsher struct efx_rx_queue *rx_queue; 718874aeea5SJeff Kirsher int rc; 719874aeea5SJeff Kirsher 720874aeea5SJeff Kirsher EFX_ASSERT_RESET_SERIALISED(efx); 721874aeea5SJeff Kirsher BUG_ON(efx->port_enabled); 722874aeea5SJeff Kirsher 7232ea4dc28SAlexandre Rames efx_ptp_stop_datapath(efx); 7242ea4dc28SAlexandre Rames 725d8aec745SBen Hutchings /* Stop RX refill */ 726d8aec745SBen Hutchings efx_for_each_channel(channel, efx) { 727d8aec745SBen Hutchings efx_for_each_channel_rx_queue(rx_queue, channel) 728d8aec745SBen Hutchings rx_queue->refill_enabled = false; 729d8aec745SBen Hutchings } 730d8aec745SBen Hutchings 731874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) { 7329f2cb71cSBen Hutchings /* RX packet processing is pipelined, so wait for the 7339f2cb71cSBen Hutchings * NAPI handler to complete. At least event queue 0 7349f2cb71cSBen Hutchings * might be kept active by non-data events, so don't 7359f2cb71cSBen Hutchings * use napi_synchronize() but actually disable NAPI 7369f2cb71cSBen Hutchings * temporarily. 7379f2cb71cSBen Hutchings */ 7389f2cb71cSBen Hutchings if (efx_channel_has_rx_queue(channel)) { 7399f2cb71cSBen Hutchings efx_stop_eventq(channel); 7409f2cb71cSBen Hutchings efx_start_eventq(channel); 7419f2cb71cSBen Hutchings } 742e42c3d85SBen Hutchings } 743874aeea5SJeff Kirsher 744e42c3d85SBen Hutchings rc = efx->type->fini_dmaq(efx); 7455a6681e2SEdward Cree if (rc) { 746e42c3d85SBen Hutchings netif_err(efx, drv, efx->net_dev, "failed to flush queues\n"); 747e42c3d85SBen Hutchings } else { 748e42c3d85SBen Hutchings netif_dbg(efx, drv, efx->net_dev, 749e42c3d85SBen Hutchings "successfully flushed all queues\n"); 750e42c3d85SBen Hutchings } 751e42c3d85SBen Hutchings 752e42c3d85SBen Hutchings efx_for_each_channel(channel, efx) { 753874aeea5SJeff Kirsher efx_for_each_channel_rx_queue(rx_queue, channel) 754874aeea5SJeff Kirsher efx_fini_rx_queue(rx_queue); 755874aeea5SJeff Kirsher efx_for_each_possible_channel_tx_queue(tx_queue, channel) 756874aeea5SJeff Kirsher efx_fini_tx_queue(tx_queue); 757874aeea5SJeff Kirsher } 758874aeea5SJeff Kirsher } 759874aeea5SJeff Kirsher 760874aeea5SJeff Kirsher static void efx_remove_channel(struct efx_channel *channel) 761874aeea5SJeff Kirsher { 762874aeea5SJeff Kirsher struct efx_tx_queue *tx_queue; 763874aeea5SJeff Kirsher struct efx_rx_queue *rx_queue; 764874aeea5SJeff Kirsher 765874aeea5SJeff Kirsher netif_dbg(channel->efx, drv, channel->efx->net_dev, 766874aeea5SJeff Kirsher "destroy chan %d\n", channel->channel); 767874aeea5SJeff Kirsher 768874aeea5SJeff Kirsher efx_for_each_channel_rx_queue(rx_queue, channel) 769874aeea5SJeff Kirsher efx_remove_rx_queue(rx_queue); 770874aeea5SJeff Kirsher efx_for_each_possible_channel_tx_queue(tx_queue, channel) 771874aeea5SJeff Kirsher efx_remove_tx_queue(tx_queue); 772874aeea5SJeff Kirsher efx_remove_eventq(channel); 773c31e5f9fSStuart Hodgson channel->type->post_remove(channel); 774874aeea5SJeff Kirsher } 775874aeea5SJeff Kirsher 776874aeea5SJeff Kirsher static void efx_remove_channels(struct efx_nic *efx) 777874aeea5SJeff Kirsher { 778874aeea5SJeff Kirsher struct efx_channel *channel; 779874aeea5SJeff Kirsher 780874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) 781874aeea5SJeff Kirsher efx_remove_channel(channel); 782874aeea5SJeff Kirsher } 783874aeea5SJeff Kirsher 784874aeea5SJeff Kirsher int 785874aeea5SJeff Kirsher efx_realloc_channels(struct efx_nic *efx, u32 rxq_entries, u32 txq_entries) 786874aeea5SJeff Kirsher { 787874aeea5SJeff Kirsher struct efx_channel *other_channel[EFX_MAX_CHANNELS], *channel; 788874aeea5SJeff Kirsher u32 old_rxq_entries, old_txq_entries; 7897f967c01SBen Hutchings unsigned i, next_buffer_table = 0; 790261e4d96SJon Cooper int rc, rc2; 7918b7325b4SBen Hutchings 7928b7325b4SBen Hutchings rc = efx_check_disabled(efx); 7938b7325b4SBen Hutchings if (rc) 7948b7325b4SBen Hutchings return rc; 7957f967c01SBen Hutchings 7967f967c01SBen Hutchings /* Not all channels should be reallocated. We must avoid 7977f967c01SBen Hutchings * reallocating their buffer table entries. 7987f967c01SBen Hutchings */ 7997f967c01SBen Hutchings efx_for_each_channel(channel, efx) { 8007f967c01SBen Hutchings struct efx_rx_queue *rx_queue; 8017f967c01SBen Hutchings struct efx_tx_queue *tx_queue; 8027f967c01SBen Hutchings 8037f967c01SBen Hutchings if (channel->type->copy) 8047f967c01SBen Hutchings continue; 8057f967c01SBen Hutchings next_buffer_table = max(next_buffer_table, 8067f967c01SBen Hutchings channel->eventq.index + 8077f967c01SBen Hutchings channel->eventq.entries); 8087f967c01SBen Hutchings efx_for_each_channel_rx_queue(rx_queue, channel) 8097f967c01SBen Hutchings next_buffer_table = max(next_buffer_table, 8107f967c01SBen Hutchings rx_queue->rxd.index + 8117f967c01SBen Hutchings rx_queue->rxd.entries); 8127f967c01SBen Hutchings efx_for_each_channel_tx_queue(tx_queue, channel) 8137f967c01SBen Hutchings next_buffer_table = max(next_buffer_table, 8147f967c01SBen Hutchings tx_queue->txd.index + 8157f967c01SBen Hutchings tx_queue->txd.entries); 8167f967c01SBen Hutchings } 817874aeea5SJeff Kirsher 81829c69a48SBen Hutchings efx_device_detach_sync(efx); 819874aeea5SJeff Kirsher efx_stop_all(efx); 820d8291187SBen Hutchings efx_soft_disable_interrupts(efx); 821874aeea5SJeff Kirsher 8227f967c01SBen Hutchings /* Clone channels (where possible) */ 823874aeea5SJeff Kirsher memset(other_channel, 0, sizeof(other_channel)); 824874aeea5SJeff Kirsher for (i = 0; i < efx->n_channels; i++) { 8257f967c01SBen Hutchings channel = efx->channel[i]; 8267f967c01SBen Hutchings if (channel->type->copy) 8277f967c01SBen Hutchings channel = channel->type->copy(channel); 828874aeea5SJeff Kirsher if (!channel) { 829874aeea5SJeff Kirsher rc = -ENOMEM; 830874aeea5SJeff Kirsher goto out; 831874aeea5SJeff Kirsher } 832874aeea5SJeff Kirsher other_channel[i] = channel; 833874aeea5SJeff Kirsher } 834874aeea5SJeff Kirsher 835874aeea5SJeff Kirsher /* Swap entry counts and channel pointers */ 836874aeea5SJeff Kirsher old_rxq_entries = efx->rxq_entries; 837874aeea5SJeff Kirsher old_txq_entries = efx->txq_entries; 838874aeea5SJeff Kirsher efx->rxq_entries = rxq_entries; 839874aeea5SJeff Kirsher efx->txq_entries = txq_entries; 840874aeea5SJeff Kirsher for (i = 0; i < efx->n_channels; i++) { 841874aeea5SJeff Kirsher channel = efx->channel[i]; 842874aeea5SJeff Kirsher efx->channel[i] = other_channel[i]; 843874aeea5SJeff Kirsher other_channel[i] = channel; 844874aeea5SJeff Kirsher } 845874aeea5SJeff Kirsher 8467f967c01SBen Hutchings /* Restart buffer table allocation */ 8477f967c01SBen Hutchings efx->next_buffer_table = next_buffer_table; 8487f967c01SBen Hutchings 8497f967c01SBen Hutchings for (i = 0; i < efx->n_channels; i++) { 8507f967c01SBen Hutchings channel = efx->channel[i]; 8517f967c01SBen Hutchings if (!channel->type->copy) 8527f967c01SBen Hutchings continue; 8537f967c01SBen Hutchings rc = efx_probe_channel(channel); 854874aeea5SJeff Kirsher if (rc) 855874aeea5SJeff Kirsher goto rollback; 8567f967c01SBen Hutchings efx_init_napi_channel(efx->channel[i]); 857874aeea5SJeff Kirsher } 858874aeea5SJeff Kirsher 8597f967c01SBen Hutchings out: 8607f967c01SBen Hutchings /* Destroy unused channel structures */ 8617f967c01SBen Hutchings for (i = 0; i < efx->n_channels; i++) { 8627f967c01SBen Hutchings channel = other_channel[i]; 8637f967c01SBen Hutchings if (channel && channel->type->copy) { 8647f967c01SBen Hutchings efx_fini_napi_channel(channel); 8657f967c01SBen Hutchings efx_remove_channel(channel); 8667f967c01SBen Hutchings kfree(channel); 8677f967c01SBen Hutchings } 8687f967c01SBen Hutchings } 8697f967c01SBen Hutchings 870261e4d96SJon Cooper rc2 = efx_soft_enable_interrupts(efx); 871261e4d96SJon Cooper if (rc2) { 872261e4d96SJon Cooper rc = rc ? rc : rc2; 873261e4d96SJon Cooper netif_err(efx, drv, efx->net_dev, 874261e4d96SJon Cooper "unable to restart interrupts on channel reallocation\n"); 875261e4d96SJon Cooper efx_schedule_reset(efx, RESET_TYPE_DISABLE); 876261e4d96SJon Cooper } else { 877874aeea5SJeff Kirsher efx_start_all(efx); 8789c568fd8SPeter Dunning efx_device_attach_if_not_resetting(efx); 879261e4d96SJon Cooper } 880874aeea5SJeff Kirsher return rc; 881874aeea5SJeff Kirsher 882874aeea5SJeff Kirsher rollback: 883874aeea5SJeff Kirsher /* Swap back */ 884874aeea5SJeff Kirsher efx->rxq_entries = old_rxq_entries; 885874aeea5SJeff Kirsher efx->txq_entries = old_txq_entries; 886874aeea5SJeff Kirsher for (i = 0; i < efx->n_channels; i++) { 887874aeea5SJeff Kirsher channel = efx->channel[i]; 888874aeea5SJeff Kirsher efx->channel[i] = other_channel[i]; 889874aeea5SJeff Kirsher other_channel[i] = channel; 890874aeea5SJeff Kirsher } 891874aeea5SJeff Kirsher goto out; 892874aeea5SJeff Kirsher } 893874aeea5SJeff Kirsher 894874aeea5SJeff Kirsher void efx_schedule_slow_fill(struct efx_rx_queue *rx_queue) 895874aeea5SJeff Kirsher { 896874aeea5SJeff Kirsher mod_timer(&rx_queue->slow_fill, jiffies + msecs_to_jiffies(100)); 897874aeea5SJeff Kirsher } 898874aeea5SJeff Kirsher 8997f967c01SBen Hutchings static const struct efx_channel_type efx_default_channel_type = { 9007f967c01SBen Hutchings .pre_probe = efx_channel_dummy_op_int, 901c31e5f9fSStuart Hodgson .post_remove = efx_channel_dummy_op_void, 9027f967c01SBen Hutchings .get_name = efx_get_channel_name, 9037f967c01SBen Hutchings .copy = efx_copy_channel, 9047f967c01SBen Hutchings .keep_eventq = false, 9057f967c01SBen Hutchings }; 9067f967c01SBen Hutchings 9077f967c01SBen Hutchings int efx_channel_dummy_op_int(struct efx_channel *channel) 9087f967c01SBen Hutchings { 9097f967c01SBen Hutchings return 0; 9107f967c01SBen Hutchings } 9117f967c01SBen Hutchings 912c31e5f9fSStuart Hodgson void efx_channel_dummy_op_void(struct efx_channel *channel) 913c31e5f9fSStuart Hodgson { 914c31e5f9fSStuart Hodgson } 915c31e5f9fSStuart Hodgson 916874aeea5SJeff Kirsher /************************************************************************** 917874aeea5SJeff Kirsher * 918874aeea5SJeff Kirsher * Port handling 919874aeea5SJeff Kirsher * 920874aeea5SJeff Kirsher **************************************************************************/ 921874aeea5SJeff Kirsher 922874aeea5SJeff Kirsher /* This ensures that the kernel is kept informed (via 923874aeea5SJeff Kirsher * netif_carrier_on/off) of the link status, and also maintains the 924874aeea5SJeff Kirsher * link status's stop on the port's TX queue. 925874aeea5SJeff Kirsher */ 926874aeea5SJeff Kirsher void efx_link_status_changed(struct efx_nic *efx) 927874aeea5SJeff Kirsher { 928874aeea5SJeff Kirsher struct efx_link_state *link_state = &efx->link_state; 929874aeea5SJeff Kirsher 930874aeea5SJeff Kirsher /* SFC Bug 5356: A net_dev notifier is registered, so we must ensure 931874aeea5SJeff Kirsher * that no events are triggered between unregister_netdev() and the 932874aeea5SJeff Kirsher * driver unloading. A more general condition is that NETDEV_CHANGE 933874aeea5SJeff Kirsher * can only be generated between NETDEV_UP and NETDEV_DOWN */ 934874aeea5SJeff Kirsher if (!netif_running(efx->net_dev)) 935874aeea5SJeff Kirsher return; 936874aeea5SJeff Kirsher 937874aeea5SJeff Kirsher if (link_state->up != netif_carrier_ok(efx->net_dev)) { 938874aeea5SJeff Kirsher efx->n_link_state_changes++; 939874aeea5SJeff Kirsher 940874aeea5SJeff Kirsher if (link_state->up) 941874aeea5SJeff Kirsher netif_carrier_on(efx->net_dev); 942874aeea5SJeff Kirsher else 943874aeea5SJeff Kirsher netif_carrier_off(efx->net_dev); 944874aeea5SJeff Kirsher } 945874aeea5SJeff Kirsher 946874aeea5SJeff Kirsher /* Status message for kernel log */ 9472aa9ef11SBen Hutchings if (link_state->up) 948874aeea5SJeff Kirsher netif_info(efx, link, efx->net_dev, 949964e6135SBen Hutchings "link up at %uMbps %s-duplex (MTU %d)\n", 950874aeea5SJeff Kirsher link_state->speed, link_state->fd ? "full" : "half", 951964e6135SBen Hutchings efx->net_dev->mtu); 9522aa9ef11SBen Hutchings else 953874aeea5SJeff Kirsher netif_info(efx, link, efx->net_dev, "link down\n"); 954874aeea5SJeff Kirsher } 955874aeea5SJeff Kirsher 956874aeea5SJeff Kirsher void efx_link_set_advertising(struct efx_nic *efx, u32 advertising) 957874aeea5SJeff Kirsher { 958874aeea5SJeff Kirsher efx->link_advertising = advertising; 959874aeea5SJeff Kirsher if (advertising) { 960874aeea5SJeff Kirsher if (advertising & ADVERTISED_Pause) 961874aeea5SJeff Kirsher efx->wanted_fc |= (EFX_FC_TX | EFX_FC_RX); 962874aeea5SJeff Kirsher else 963874aeea5SJeff Kirsher efx->wanted_fc &= ~(EFX_FC_TX | EFX_FC_RX); 964874aeea5SJeff Kirsher if (advertising & ADVERTISED_Asym_Pause) 965874aeea5SJeff Kirsher efx->wanted_fc ^= EFX_FC_TX; 966874aeea5SJeff Kirsher } 967874aeea5SJeff Kirsher } 968874aeea5SJeff Kirsher 969874aeea5SJeff Kirsher void efx_link_set_wanted_fc(struct efx_nic *efx, u8 wanted_fc) 970874aeea5SJeff Kirsher { 971874aeea5SJeff Kirsher efx->wanted_fc = wanted_fc; 972874aeea5SJeff Kirsher if (efx->link_advertising) { 973874aeea5SJeff Kirsher if (wanted_fc & EFX_FC_RX) 974874aeea5SJeff Kirsher efx->link_advertising |= (ADVERTISED_Pause | 975874aeea5SJeff Kirsher ADVERTISED_Asym_Pause); 976874aeea5SJeff Kirsher else 977874aeea5SJeff Kirsher efx->link_advertising &= ~(ADVERTISED_Pause | 978874aeea5SJeff Kirsher ADVERTISED_Asym_Pause); 979874aeea5SJeff Kirsher if (wanted_fc & EFX_FC_TX) 980874aeea5SJeff Kirsher efx->link_advertising ^= ADVERTISED_Asym_Pause; 981874aeea5SJeff Kirsher } 982874aeea5SJeff Kirsher } 983874aeea5SJeff Kirsher 984874aeea5SJeff Kirsher static void efx_fini_port(struct efx_nic *efx); 985874aeea5SJeff Kirsher 9860d322413SEdward Cree /* We assume that efx->type->reconfigure_mac will always try to sync RX 9870d322413SEdward Cree * filters and therefore needs to read-lock the filter table against freeing 9880d322413SEdward Cree */ 9890d322413SEdward Cree void efx_mac_reconfigure(struct efx_nic *efx) 9900d322413SEdward Cree { 9910d322413SEdward Cree down_read(&efx->filter_sem); 9920d322413SEdward Cree efx->type->reconfigure_mac(efx); 9930d322413SEdward Cree up_read(&efx->filter_sem); 9940d322413SEdward Cree } 9950d322413SEdward Cree 996874aeea5SJeff Kirsher /* Push loopback/power/transmit disable settings to the PHY, and reconfigure 997874aeea5SJeff Kirsher * the MAC appropriately. All other PHY configuration changes are pushed 998874aeea5SJeff Kirsher * through phy_op->set_settings(), and pushed asynchronously to the MAC 999874aeea5SJeff Kirsher * through efx_monitor(). 1000874aeea5SJeff Kirsher * 1001874aeea5SJeff Kirsher * Callers must hold the mac_lock 1002874aeea5SJeff Kirsher */ 1003874aeea5SJeff Kirsher int __efx_reconfigure_port(struct efx_nic *efx) 1004874aeea5SJeff Kirsher { 1005874aeea5SJeff Kirsher enum efx_phy_mode phy_mode; 1006874aeea5SJeff Kirsher int rc; 1007874aeea5SJeff Kirsher 1008874aeea5SJeff Kirsher WARN_ON(!mutex_is_locked(&efx->mac_lock)); 1009874aeea5SJeff Kirsher 1010874aeea5SJeff Kirsher /* Disable PHY transmit in mac level loopbacks */ 1011874aeea5SJeff Kirsher phy_mode = efx->phy_mode; 1012874aeea5SJeff Kirsher if (LOOPBACK_INTERNAL(efx)) 1013874aeea5SJeff Kirsher efx->phy_mode |= PHY_MODE_TX_DISABLED; 1014874aeea5SJeff Kirsher else 1015874aeea5SJeff Kirsher efx->phy_mode &= ~PHY_MODE_TX_DISABLED; 1016874aeea5SJeff Kirsher 1017874aeea5SJeff Kirsher rc = efx->type->reconfigure_port(efx); 1018874aeea5SJeff Kirsher 1019874aeea5SJeff Kirsher if (rc) 1020874aeea5SJeff Kirsher efx->phy_mode = phy_mode; 1021874aeea5SJeff Kirsher 1022874aeea5SJeff Kirsher return rc; 1023874aeea5SJeff Kirsher } 1024874aeea5SJeff Kirsher 1025874aeea5SJeff Kirsher /* Reinitialise the MAC to pick up new PHY settings, even if the port is 1026874aeea5SJeff Kirsher * disabled. */ 1027874aeea5SJeff Kirsher int efx_reconfigure_port(struct efx_nic *efx) 1028874aeea5SJeff Kirsher { 1029874aeea5SJeff Kirsher int rc; 1030874aeea5SJeff Kirsher 1031874aeea5SJeff Kirsher EFX_ASSERT_RESET_SERIALISED(efx); 1032874aeea5SJeff Kirsher 1033874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 1034874aeea5SJeff Kirsher rc = __efx_reconfigure_port(efx); 1035874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 1036874aeea5SJeff Kirsher 1037874aeea5SJeff Kirsher return rc; 1038874aeea5SJeff Kirsher } 1039874aeea5SJeff Kirsher 1040874aeea5SJeff Kirsher /* Asynchronous work item for changing MAC promiscuity and multicast 1041874aeea5SJeff Kirsher * hash. Avoid a drain/rx_ingress enable by reconfiguring the current 1042874aeea5SJeff Kirsher * MAC directly. */ 1043874aeea5SJeff Kirsher static void efx_mac_work(struct work_struct *data) 1044874aeea5SJeff Kirsher { 1045874aeea5SJeff Kirsher struct efx_nic *efx = container_of(data, struct efx_nic, mac_work); 1046874aeea5SJeff Kirsher 1047874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 104830b81cdaSBen Hutchings if (efx->port_enabled) 10490d322413SEdward Cree efx_mac_reconfigure(efx); 1050874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 1051874aeea5SJeff Kirsher } 1052874aeea5SJeff Kirsher 1053874aeea5SJeff Kirsher static int efx_probe_port(struct efx_nic *efx) 1054874aeea5SJeff Kirsher { 1055874aeea5SJeff Kirsher int rc; 1056874aeea5SJeff Kirsher 1057874aeea5SJeff Kirsher netif_dbg(efx, probe, efx->net_dev, "create port\n"); 1058874aeea5SJeff Kirsher 1059874aeea5SJeff Kirsher if (phy_flash_cfg) 1060874aeea5SJeff Kirsher efx->phy_mode = PHY_MODE_SPECIAL; 1061874aeea5SJeff Kirsher 1062874aeea5SJeff Kirsher /* Connect up MAC/PHY operations table */ 1063874aeea5SJeff Kirsher rc = efx->type->probe_port(efx); 1064874aeea5SJeff Kirsher if (rc) 1065874aeea5SJeff Kirsher return rc; 1066874aeea5SJeff Kirsher 1067e332bcb3SBen Hutchings /* Initialise MAC address to permanent address */ 1068cd84ff4dSEdward Cree ether_addr_copy(efx->net_dev->dev_addr, efx->net_dev->perm_addr); 1069874aeea5SJeff Kirsher 1070874aeea5SJeff Kirsher return 0; 1071874aeea5SJeff Kirsher } 1072874aeea5SJeff Kirsher 1073874aeea5SJeff Kirsher static int efx_init_port(struct efx_nic *efx) 1074874aeea5SJeff Kirsher { 1075874aeea5SJeff Kirsher int rc; 1076874aeea5SJeff Kirsher 1077874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "init port\n"); 1078874aeea5SJeff Kirsher 1079874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 1080874aeea5SJeff Kirsher 1081874aeea5SJeff Kirsher rc = efx->phy_op->init(efx); 1082874aeea5SJeff Kirsher if (rc) 1083874aeea5SJeff Kirsher goto fail1; 1084874aeea5SJeff Kirsher 1085874aeea5SJeff Kirsher efx->port_initialized = true; 1086874aeea5SJeff Kirsher 1087874aeea5SJeff Kirsher /* Reconfigure the MAC before creating dma queues (required for 1088874aeea5SJeff Kirsher * Falcon/A1 where RX_INGR_EN/TX_DRAIN_EN isn't supported) */ 10890d322413SEdward Cree efx_mac_reconfigure(efx); 1090874aeea5SJeff Kirsher 1091874aeea5SJeff Kirsher /* Ensure the PHY advertises the correct flow control settings */ 1092874aeea5SJeff Kirsher rc = efx->phy_op->reconfigure(efx); 1093267d9d73SEdward Cree if (rc && rc != -EPERM) 1094874aeea5SJeff Kirsher goto fail2; 1095874aeea5SJeff Kirsher 1096874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 1097874aeea5SJeff Kirsher return 0; 1098874aeea5SJeff Kirsher 1099874aeea5SJeff Kirsher fail2: 1100874aeea5SJeff Kirsher efx->phy_op->fini(efx); 1101874aeea5SJeff Kirsher fail1: 1102874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 1103874aeea5SJeff Kirsher return rc; 1104874aeea5SJeff Kirsher } 1105874aeea5SJeff Kirsher 1106874aeea5SJeff Kirsher static void efx_start_port(struct efx_nic *efx) 1107874aeea5SJeff Kirsher { 1108874aeea5SJeff Kirsher netif_dbg(efx, ifup, efx->net_dev, "start port\n"); 1109874aeea5SJeff Kirsher BUG_ON(efx->port_enabled); 1110874aeea5SJeff Kirsher 1111874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 1112874aeea5SJeff Kirsher efx->port_enabled = true; 1113874aeea5SJeff Kirsher 1114d615c039SBen Hutchings /* Ensure MAC ingress/egress is enabled */ 11150d322413SEdward Cree efx_mac_reconfigure(efx); 1116874aeea5SJeff Kirsher 1117874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 1118874aeea5SJeff Kirsher } 1119874aeea5SJeff Kirsher 1120d615c039SBen Hutchings /* Cancel work for MAC reconfiguration, periodic hardware monitoring 1121d615c039SBen Hutchings * and the async self-test, wait for them to finish and prevent them 1122d615c039SBen Hutchings * being scheduled again. This doesn't cover online resets, which 1123d615c039SBen Hutchings * should only be cancelled when removing the device. 1124d615c039SBen Hutchings */ 1125874aeea5SJeff Kirsher static void efx_stop_port(struct efx_nic *efx) 1126874aeea5SJeff Kirsher { 1127874aeea5SJeff Kirsher netif_dbg(efx, ifdown, efx->net_dev, "stop port\n"); 1128874aeea5SJeff Kirsher 1129d615c039SBen Hutchings EFX_ASSERT_RESET_SERIALISED(efx); 1130d615c039SBen Hutchings 1131874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 1132874aeea5SJeff Kirsher efx->port_enabled = false; 1133874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 1134874aeea5SJeff Kirsher 1135874aeea5SJeff Kirsher /* Serialise against efx_set_multicast_list() */ 1136874aeea5SJeff Kirsher netif_addr_lock_bh(efx->net_dev); 1137874aeea5SJeff Kirsher netif_addr_unlock_bh(efx->net_dev); 1138d615c039SBen Hutchings 1139d615c039SBen Hutchings cancel_delayed_work_sync(&efx->monitor_work); 1140d615c039SBen Hutchings efx_selftest_async_cancel(efx); 1141d615c039SBen Hutchings cancel_work_sync(&efx->mac_work); 1142874aeea5SJeff Kirsher } 1143874aeea5SJeff Kirsher 1144874aeea5SJeff Kirsher static void efx_fini_port(struct efx_nic *efx) 1145874aeea5SJeff Kirsher { 1146874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "shut down port\n"); 1147874aeea5SJeff Kirsher 1148874aeea5SJeff Kirsher if (!efx->port_initialized) 1149874aeea5SJeff Kirsher return; 1150874aeea5SJeff Kirsher 1151874aeea5SJeff Kirsher efx->phy_op->fini(efx); 1152874aeea5SJeff Kirsher efx->port_initialized = false; 1153874aeea5SJeff Kirsher 1154874aeea5SJeff Kirsher efx->link_state.up = false; 1155874aeea5SJeff Kirsher efx_link_status_changed(efx); 1156874aeea5SJeff Kirsher } 1157874aeea5SJeff Kirsher 1158874aeea5SJeff Kirsher static void efx_remove_port(struct efx_nic *efx) 1159874aeea5SJeff Kirsher { 1160874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "destroying port\n"); 1161874aeea5SJeff Kirsher 1162874aeea5SJeff Kirsher efx->type->remove_port(efx); 1163874aeea5SJeff Kirsher } 1164874aeea5SJeff Kirsher 1165874aeea5SJeff Kirsher /************************************************************************** 1166874aeea5SJeff Kirsher * 1167874aeea5SJeff Kirsher * NIC handling 1168874aeea5SJeff Kirsher * 1169874aeea5SJeff Kirsher **************************************************************************/ 1170874aeea5SJeff Kirsher 11710bcf4a64SBen Hutchings static LIST_HEAD(efx_primary_list); 11720bcf4a64SBen Hutchings static LIST_HEAD(efx_unassociated_list); 11730bcf4a64SBen Hutchings 11740bcf4a64SBen Hutchings static bool efx_same_controller(struct efx_nic *left, struct efx_nic *right) 11750bcf4a64SBen Hutchings { 11760bcf4a64SBen Hutchings return left->type == right->type && 11770bcf4a64SBen Hutchings left->vpd_sn && right->vpd_sn && 11780bcf4a64SBen Hutchings !strcmp(left->vpd_sn, right->vpd_sn); 11790bcf4a64SBen Hutchings } 11800bcf4a64SBen Hutchings 11810bcf4a64SBen Hutchings static void efx_associate(struct efx_nic *efx) 11820bcf4a64SBen Hutchings { 11830bcf4a64SBen Hutchings struct efx_nic *other, *next; 11840bcf4a64SBen Hutchings 11850bcf4a64SBen Hutchings if (efx->primary == efx) { 11860bcf4a64SBen Hutchings /* Adding primary function; look for secondaries */ 11870bcf4a64SBen Hutchings 11880bcf4a64SBen Hutchings netif_dbg(efx, probe, efx->net_dev, "adding to primary list\n"); 11890bcf4a64SBen Hutchings list_add_tail(&efx->node, &efx_primary_list); 11900bcf4a64SBen Hutchings 11910bcf4a64SBen Hutchings list_for_each_entry_safe(other, next, &efx_unassociated_list, 11920bcf4a64SBen Hutchings node) { 11930bcf4a64SBen Hutchings if (efx_same_controller(efx, other)) { 11940bcf4a64SBen Hutchings list_del(&other->node); 11950bcf4a64SBen Hutchings netif_dbg(other, probe, other->net_dev, 11960bcf4a64SBen Hutchings "moving to secondary list of %s %s\n", 11970bcf4a64SBen Hutchings pci_name(efx->pci_dev), 11980bcf4a64SBen Hutchings efx->net_dev->name); 11990bcf4a64SBen Hutchings list_add_tail(&other->node, 12000bcf4a64SBen Hutchings &efx->secondary_list); 12010bcf4a64SBen Hutchings other->primary = efx; 12020bcf4a64SBen Hutchings } 12030bcf4a64SBen Hutchings } 12040bcf4a64SBen Hutchings } else { 12050bcf4a64SBen Hutchings /* Adding secondary function; look for primary */ 12060bcf4a64SBen Hutchings 12070bcf4a64SBen Hutchings list_for_each_entry(other, &efx_primary_list, node) { 12080bcf4a64SBen Hutchings if (efx_same_controller(efx, other)) { 12090bcf4a64SBen Hutchings netif_dbg(efx, probe, efx->net_dev, 12100bcf4a64SBen Hutchings "adding to secondary list of %s %s\n", 12110bcf4a64SBen Hutchings pci_name(other->pci_dev), 12120bcf4a64SBen Hutchings other->net_dev->name); 12130bcf4a64SBen Hutchings list_add_tail(&efx->node, 12140bcf4a64SBen Hutchings &other->secondary_list); 12150bcf4a64SBen Hutchings efx->primary = other; 12160bcf4a64SBen Hutchings return; 12170bcf4a64SBen Hutchings } 12180bcf4a64SBen Hutchings } 12190bcf4a64SBen Hutchings 12200bcf4a64SBen Hutchings netif_dbg(efx, probe, efx->net_dev, 12210bcf4a64SBen Hutchings "adding to unassociated list\n"); 12220bcf4a64SBen Hutchings list_add_tail(&efx->node, &efx_unassociated_list); 12230bcf4a64SBen Hutchings } 12240bcf4a64SBen Hutchings } 12250bcf4a64SBen Hutchings 12260bcf4a64SBen Hutchings static void efx_dissociate(struct efx_nic *efx) 12270bcf4a64SBen Hutchings { 12280bcf4a64SBen Hutchings struct efx_nic *other, *next; 12290bcf4a64SBen Hutchings 12300bcf4a64SBen Hutchings list_del(&efx->node); 12310bcf4a64SBen Hutchings efx->primary = NULL; 12320bcf4a64SBen Hutchings 12330bcf4a64SBen Hutchings list_for_each_entry_safe(other, next, &efx->secondary_list, node) { 12340bcf4a64SBen Hutchings list_del(&other->node); 12350bcf4a64SBen Hutchings netif_dbg(other, probe, other->net_dev, 12360bcf4a64SBen Hutchings "moving to unassociated list\n"); 12370bcf4a64SBen Hutchings list_add_tail(&other->node, &efx_unassociated_list); 12380bcf4a64SBen Hutchings other->primary = NULL; 12390bcf4a64SBen Hutchings } 12400bcf4a64SBen Hutchings } 12410bcf4a64SBen Hutchings 1242874aeea5SJeff Kirsher /* This configures the PCI device to enable I/O and DMA. */ 1243874aeea5SJeff Kirsher static int efx_init_io(struct efx_nic *efx) 1244874aeea5SJeff Kirsher { 1245874aeea5SJeff Kirsher struct pci_dev *pci_dev = efx->pci_dev; 1246874aeea5SJeff Kirsher dma_addr_t dma_mask = efx->type->max_dma_mask; 1247b105798fSBen Hutchings unsigned int mem_map_size = efx->type->mem_map_size(efx); 124802246a7fSShradha Shah int rc, bar; 1249874aeea5SJeff Kirsher 1250874aeea5SJeff Kirsher netif_dbg(efx, probe, efx->net_dev, "initialising I/O\n"); 1251874aeea5SJeff Kirsher 125203714bbbSEdward Cree bar = efx->type->mem_bar(efx); 125302246a7fSShradha Shah 1254874aeea5SJeff Kirsher rc = pci_enable_device(pci_dev); 1255874aeea5SJeff Kirsher if (rc) { 1256874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 1257874aeea5SJeff Kirsher "failed to enable PCI device\n"); 1258874aeea5SJeff Kirsher goto fail1; 1259874aeea5SJeff Kirsher } 1260874aeea5SJeff Kirsher 1261874aeea5SJeff Kirsher pci_set_master(pci_dev); 1262874aeea5SJeff Kirsher 1263874aeea5SJeff Kirsher /* Set the PCI DMA mask. Try all possibilities from our 1264874aeea5SJeff Kirsher * genuine mask down to 32 bits, because some architectures 1265874aeea5SJeff Kirsher * (e.g. x86_64 with iommu_sac_force set) will allow 40 bit 1266874aeea5SJeff Kirsher * masks event though they reject 46 bit masks. 1267874aeea5SJeff Kirsher */ 1268874aeea5SJeff Kirsher while (dma_mask > 0x7fffffffUL) { 12699663dedaSRussell King rc = dma_set_mask_and_coherent(&pci_dev->dev, dma_mask); 1270e9e01846SBen Hutchings if (rc == 0) 1271874aeea5SJeff Kirsher break; 1272874aeea5SJeff Kirsher dma_mask >>= 1; 1273874aeea5SJeff Kirsher } 1274874aeea5SJeff Kirsher if (rc) { 1275874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 1276874aeea5SJeff Kirsher "could not find a suitable DMA mask\n"); 1277874aeea5SJeff Kirsher goto fail2; 1278874aeea5SJeff Kirsher } 1279874aeea5SJeff Kirsher netif_dbg(efx, probe, efx->net_dev, 1280874aeea5SJeff Kirsher "using DMA mask %llx\n", (unsigned long long) dma_mask); 1281874aeea5SJeff Kirsher 128202246a7fSShradha Shah efx->membase_phys = pci_resource_start(efx->pci_dev, bar); 128302246a7fSShradha Shah rc = pci_request_region(pci_dev, bar, "sfc"); 1284874aeea5SJeff Kirsher if (rc) { 1285874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 1286874aeea5SJeff Kirsher "request for memory BAR failed\n"); 1287874aeea5SJeff Kirsher rc = -EIO; 1288874aeea5SJeff Kirsher goto fail3; 1289874aeea5SJeff Kirsher } 1290b105798fSBen Hutchings efx->membase = ioremap_nocache(efx->membase_phys, mem_map_size); 1291874aeea5SJeff Kirsher if (!efx->membase) { 1292874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 1293874aeea5SJeff Kirsher "could not map memory BAR at %llx+%x\n", 1294b105798fSBen Hutchings (unsigned long long)efx->membase_phys, mem_map_size); 1295874aeea5SJeff Kirsher rc = -ENOMEM; 1296874aeea5SJeff Kirsher goto fail4; 1297874aeea5SJeff Kirsher } 1298874aeea5SJeff Kirsher netif_dbg(efx, probe, efx->net_dev, 1299874aeea5SJeff Kirsher "memory BAR at %llx+%x (virtual %p)\n", 1300b105798fSBen Hutchings (unsigned long long)efx->membase_phys, mem_map_size, 1301b105798fSBen Hutchings efx->membase); 1302874aeea5SJeff Kirsher 1303874aeea5SJeff Kirsher return 0; 1304874aeea5SJeff Kirsher 1305874aeea5SJeff Kirsher fail4: 130602246a7fSShradha Shah pci_release_region(efx->pci_dev, bar); 1307874aeea5SJeff Kirsher fail3: 1308874aeea5SJeff Kirsher efx->membase_phys = 0; 1309874aeea5SJeff Kirsher fail2: 1310874aeea5SJeff Kirsher pci_disable_device(efx->pci_dev); 1311874aeea5SJeff Kirsher fail1: 1312874aeea5SJeff Kirsher return rc; 1313874aeea5SJeff Kirsher } 1314874aeea5SJeff Kirsher 1315874aeea5SJeff Kirsher static void efx_fini_io(struct efx_nic *efx) 1316874aeea5SJeff Kirsher { 131702246a7fSShradha Shah int bar; 131802246a7fSShradha Shah 1319874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "shutting down I/O\n"); 1320874aeea5SJeff Kirsher 1321874aeea5SJeff Kirsher if (efx->membase) { 1322874aeea5SJeff Kirsher iounmap(efx->membase); 1323874aeea5SJeff Kirsher efx->membase = NULL; 1324874aeea5SJeff Kirsher } 1325874aeea5SJeff Kirsher 1326874aeea5SJeff Kirsher if (efx->membase_phys) { 132703714bbbSEdward Cree bar = efx->type->mem_bar(efx); 132802246a7fSShradha Shah pci_release_region(efx->pci_dev, bar); 1329874aeea5SJeff Kirsher efx->membase_phys = 0; 1330874aeea5SJeff Kirsher } 1331874aeea5SJeff Kirsher 13326598dad2SDaniel Pieczko /* Don't disable bus-mastering if VFs are assigned */ 13336598dad2SDaniel Pieczko if (!pci_vfs_assigned(efx->pci_dev)) 1334874aeea5SJeff Kirsher pci_disable_device(efx->pci_dev); 1335874aeea5SJeff Kirsher } 1336874aeea5SJeff Kirsher 1337267c0157SJon Cooper void efx_set_default_rx_indir_table(struct efx_nic *efx) 1338267c0157SJon Cooper { 1339267c0157SJon Cooper size_t i; 1340267c0157SJon Cooper 1341267c0157SJon Cooper for (i = 0; i < ARRAY_SIZE(efx->rx_indir_table); i++) 1342267c0157SJon Cooper efx->rx_indir_table[i] = 1343267c0157SJon Cooper ethtool_rxfh_indir_default(i, efx->rss_spread); 1344267c0157SJon Cooper } 1345267c0157SJon Cooper 1346a9a52506SBen Hutchings static unsigned int efx_wanted_parallelism(struct efx_nic *efx) 1347874aeea5SJeff Kirsher { 1348cdb08f8fSBen Hutchings cpumask_var_t thread_mask; 1349a16e5b24SBen Hutchings unsigned int count; 1350874aeea5SJeff Kirsher int cpu; 1351874aeea5SJeff Kirsher 1352cd2d5b52SBen Hutchings if (rss_cpus) { 1353cd2d5b52SBen Hutchings count = rss_cpus; 1354cd2d5b52SBen Hutchings } else { 1355cdb08f8fSBen Hutchings if (unlikely(!zalloc_cpumask_var(&thread_mask, GFP_KERNEL))) { 1356a9a52506SBen Hutchings netif_warn(efx, probe, efx->net_dev, 1357a9a52506SBen Hutchings "RSS disabled due to allocation failure\n"); 1358874aeea5SJeff Kirsher return 1; 1359874aeea5SJeff Kirsher } 1360874aeea5SJeff Kirsher 1361874aeea5SJeff Kirsher count = 0; 1362874aeea5SJeff Kirsher for_each_online_cpu(cpu) { 1363cdb08f8fSBen Hutchings if (!cpumask_test_cpu(cpu, thread_mask)) { 1364874aeea5SJeff Kirsher ++count; 1365cdb08f8fSBen Hutchings cpumask_or(thread_mask, thread_mask, 136606931e62SBartosz Golaszewski topology_sibling_cpumask(cpu)); 1367874aeea5SJeff Kirsher } 1368874aeea5SJeff Kirsher } 1369874aeea5SJeff Kirsher 1370cdb08f8fSBen Hutchings free_cpumask_var(thread_mask); 1371cd2d5b52SBen Hutchings } 1372cd2d5b52SBen Hutchings 1373271a8b42SBert Kenward if (count > EFX_MAX_RX_QUEUES) { 1374271a8b42SBert Kenward netif_cond_dbg(efx, probe, efx->net_dev, !rss_cpus, warn, 1375271a8b42SBert Kenward "Reducing number of rx queues from %u to %u.\n", 1376271a8b42SBert Kenward count, EFX_MAX_RX_QUEUES); 1377271a8b42SBert Kenward count = EFX_MAX_RX_QUEUES; 1378271a8b42SBert Kenward } 1379271a8b42SBert Kenward 1380cd2d5b52SBen Hutchings /* If RSS is requested for the PF *and* VFs then we can't write RSS 1381cd2d5b52SBen Hutchings * table entries that are inaccessible to VFs 1382cd2d5b52SBen Hutchings */ 13837fa8d547SShradha Shah #ifdef CONFIG_SFC_SRIOV 13847fa8d547SShradha Shah if (efx->type->sriov_wanted) { 1385d98a4ffeSShradha Shah if (efx->type->sriov_wanted(efx) && efx_vf_size(efx) > 1 && 1386cd2d5b52SBen Hutchings count > efx_vf_size(efx)) { 1387cd2d5b52SBen Hutchings netif_warn(efx, probe, efx->net_dev, 1388cd2d5b52SBen Hutchings "Reducing number of RSS channels from %u to %u for " 1389cd2d5b52SBen Hutchings "VF support. Increase vf-msix-limit to use more " 1390cd2d5b52SBen Hutchings "channels on the PF.\n", 1391cd2d5b52SBen Hutchings count, efx_vf_size(efx)); 1392cd2d5b52SBen Hutchings count = efx_vf_size(efx); 1393cd2d5b52SBen Hutchings } 13947fa8d547SShradha Shah } 13957fa8d547SShradha Shah #endif 1396cd2d5b52SBen Hutchings 1397874aeea5SJeff Kirsher return count; 1398874aeea5SJeff Kirsher } 1399874aeea5SJeff Kirsher 1400874aeea5SJeff Kirsher /* Probe the number and type of interrupts we are able to obtain, and 1401874aeea5SJeff Kirsher * the resulting numbers of channels and RX queues. 1402874aeea5SJeff Kirsher */ 1403874aeea5SJeff Kirsher static int efx_probe_interrupts(struct efx_nic *efx) 1404874aeea5SJeff Kirsher { 14057f967c01SBen Hutchings unsigned int extra_channels = 0; 14067f967c01SBen Hutchings unsigned int i, j; 1407a16e5b24SBen Hutchings int rc; 1408874aeea5SJeff Kirsher 14097f967c01SBen Hutchings for (i = 0; i < EFX_MAX_EXTRA_CHANNELS; i++) 14107f967c01SBen Hutchings if (efx->extra_channel_type[i]) 14117f967c01SBen Hutchings ++extra_channels; 14127f967c01SBen Hutchings 1413874aeea5SJeff Kirsher if (efx->interrupt_mode == EFX_INT_MODE_MSIX) { 1414874aeea5SJeff Kirsher struct msix_entry xentries[EFX_MAX_CHANNELS]; 1415a16e5b24SBen Hutchings unsigned int n_channels; 1416874aeea5SJeff Kirsher 1417a9a52506SBen Hutchings n_channels = efx_wanted_parallelism(efx); 1418b0fbdae1SShradha Shah if (efx_separate_tx_channels) 1419874aeea5SJeff Kirsher n_channels *= 2; 14207f967c01SBen Hutchings n_channels += extra_channels; 1421b105798fSBen Hutchings n_channels = min(n_channels, efx->max_channels); 1422874aeea5SJeff Kirsher 1423874aeea5SJeff Kirsher for (i = 0; i < n_channels; i++) 1424874aeea5SJeff Kirsher xentries[i].entry = i; 1425184603d8SAlexander Gordeev rc = pci_enable_msix_range(efx->pci_dev, 1426184603d8SAlexander Gordeev xentries, 1, n_channels); 1427184603d8SAlexander Gordeev if (rc < 0) { 1428184603d8SAlexander Gordeev /* Fall back to single channel MSI */ 1429184603d8SAlexander Gordeev netif_err(efx, drv, efx->net_dev, 1430184603d8SAlexander Gordeev "could not enable MSI-X\n"); 143162980cb6SAndrew Rybchenko if (efx->type->min_interrupt_mode >= EFX_INT_MODE_MSI) 143262980cb6SAndrew Rybchenko efx->interrupt_mode = EFX_INT_MODE_MSI; 143362980cb6SAndrew Rybchenko else 143462980cb6SAndrew Rybchenko return rc; 1435184603d8SAlexander Gordeev } else if (rc < n_channels) { 1436874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, 1437874aeea5SJeff Kirsher "WARNING: Insufficient MSI-X vectors" 1438a16e5b24SBen Hutchings " available (%d < %u).\n", rc, n_channels); 1439874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, 1440874aeea5SJeff Kirsher "WARNING: Performance may be reduced.\n"); 1441874aeea5SJeff Kirsher n_channels = rc; 1442874aeea5SJeff Kirsher } 1443874aeea5SJeff Kirsher 1444184603d8SAlexander Gordeev if (rc > 0) { 1445874aeea5SJeff Kirsher efx->n_channels = n_channels; 14467f967c01SBen Hutchings if (n_channels > extra_channels) 14477f967c01SBen Hutchings n_channels -= extra_channels; 1448b0fbdae1SShradha Shah if (efx_separate_tx_channels) { 1449b0fbdae1SShradha Shah efx->n_tx_channels = min(max(n_channels / 2, 1450b0fbdae1SShradha Shah 1U), 1451b0fbdae1SShradha Shah efx->max_tx_channels); 14527f967c01SBen Hutchings efx->n_rx_channels = max(n_channels - 14537f967c01SBen Hutchings efx->n_tx_channels, 14547f967c01SBen Hutchings 1U); 1455874aeea5SJeff Kirsher } else { 1456b0fbdae1SShradha Shah efx->n_tx_channels = min(n_channels, 1457b0fbdae1SShradha Shah efx->max_tx_channels); 14587f967c01SBen Hutchings efx->n_rx_channels = n_channels; 1459874aeea5SJeff Kirsher } 14607f967c01SBen Hutchings for (i = 0; i < efx->n_channels; i++) 1461874aeea5SJeff Kirsher efx_get_channel(efx, i)->irq = 1462874aeea5SJeff Kirsher xentries[i].vector; 1463874aeea5SJeff Kirsher } 1464874aeea5SJeff Kirsher } 1465874aeea5SJeff Kirsher 1466874aeea5SJeff Kirsher /* Try single interrupt MSI */ 1467874aeea5SJeff Kirsher if (efx->interrupt_mode == EFX_INT_MODE_MSI) { 1468874aeea5SJeff Kirsher efx->n_channels = 1; 1469874aeea5SJeff Kirsher efx->n_rx_channels = 1; 1470874aeea5SJeff Kirsher efx->n_tx_channels = 1; 1471874aeea5SJeff Kirsher rc = pci_enable_msi(efx->pci_dev); 1472874aeea5SJeff Kirsher if (rc == 0) { 1473874aeea5SJeff Kirsher efx_get_channel(efx, 0)->irq = efx->pci_dev->irq; 1474874aeea5SJeff Kirsher } else { 1475874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, 1476874aeea5SJeff Kirsher "could not enable MSI\n"); 147762980cb6SAndrew Rybchenko if (efx->type->min_interrupt_mode >= EFX_INT_MODE_LEGACY) 1478874aeea5SJeff Kirsher efx->interrupt_mode = EFX_INT_MODE_LEGACY; 147962980cb6SAndrew Rybchenko else 148062980cb6SAndrew Rybchenko return rc; 1481874aeea5SJeff Kirsher } 1482874aeea5SJeff Kirsher } 1483874aeea5SJeff Kirsher 1484874aeea5SJeff Kirsher /* Assume legacy interrupts */ 1485874aeea5SJeff Kirsher if (efx->interrupt_mode == EFX_INT_MODE_LEGACY) { 1486b0fbdae1SShradha Shah efx->n_channels = 1 + (efx_separate_tx_channels ? 1 : 0); 1487874aeea5SJeff Kirsher efx->n_rx_channels = 1; 1488874aeea5SJeff Kirsher efx->n_tx_channels = 1; 1489874aeea5SJeff Kirsher efx->legacy_irq = efx->pci_dev->irq; 1490874aeea5SJeff Kirsher } 1491874aeea5SJeff Kirsher 14927f967c01SBen Hutchings /* Assign extra channels if possible */ 14937f967c01SBen Hutchings j = efx->n_channels; 14947f967c01SBen Hutchings for (i = 0; i < EFX_MAX_EXTRA_CHANNELS; i++) { 14957f967c01SBen Hutchings if (!efx->extra_channel_type[i]) 14967f967c01SBen Hutchings continue; 14977f967c01SBen Hutchings if (efx->interrupt_mode != EFX_INT_MODE_MSIX || 14987f967c01SBen Hutchings efx->n_channels <= extra_channels) { 14997f967c01SBen Hutchings efx->extra_channel_type[i]->handle_no_channel(efx); 15007f967c01SBen Hutchings } else { 15017f967c01SBen Hutchings --j; 15027f967c01SBen Hutchings efx_get_channel(efx, j)->type = 15037f967c01SBen Hutchings efx->extra_channel_type[i]; 15047f967c01SBen Hutchings } 15057f967c01SBen Hutchings } 15067f967c01SBen Hutchings 1507cd2d5b52SBen Hutchings /* RSS might be usable on VFs even if it is disabled on the PF */ 15087fa8d547SShradha Shah #ifdef CONFIG_SFC_SRIOV 15097fa8d547SShradha Shah if (efx->type->sriov_wanted) { 1510327c685eSShradha Shah efx->rss_spread = ((efx->n_rx_channels > 1 || 1511d98a4ffeSShradha Shah !efx->type->sriov_wanted(efx)) ? 1512cd2d5b52SBen Hutchings efx->n_rx_channels : efx_vf_size(efx)); 15137fa8d547SShradha Shah return 0; 15147fa8d547SShradha Shah } 15157fa8d547SShradha Shah #endif 15167fa8d547SShradha Shah efx->rss_spread = efx->n_rx_channels; 1517cd2d5b52SBen Hutchings 1518874aeea5SJeff Kirsher return 0; 1519874aeea5SJeff Kirsher } 1520874aeea5SJeff Kirsher 1521261e4d96SJon Cooper static int efx_soft_enable_interrupts(struct efx_nic *efx) 1522d8291187SBen Hutchings { 1523261e4d96SJon Cooper struct efx_channel *channel, *end_channel; 1524261e4d96SJon Cooper int rc; 1525d8291187SBen Hutchings 1526d8291187SBen Hutchings BUG_ON(efx->state == STATE_DISABLED); 1527d8291187SBen Hutchings 1528d8291187SBen Hutchings efx->irq_soft_enabled = true; 1529d8291187SBen Hutchings smp_wmb(); 1530d8291187SBen Hutchings 1531d8291187SBen Hutchings efx_for_each_channel(channel, efx) { 1532261e4d96SJon Cooper if (!channel->type->keep_eventq) { 1533261e4d96SJon Cooper rc = efx_init_eventq(channel); 1534261e4d96SJon Cooper if (rc) 1535261e4d96SJon Cooper goto fail; 1536261e4d96SJon Cooper } 1537d8291187SBen Hutchings efx_start_eventq(channel); 1538d8291187SBen Hutchings } 1539d8291187SBen Hutchings 1540d8291187SBen Hutchings efx_mcdi_mode_event(efx); 1541261e4d96SJon Cooper 1542261e4d96SJon Cooper return 0; 1543261e4d96SJon Cooper fail: 1544261e4d96SJon Cooper end_channel = channel; 1545261e4d96SJon Cooper efx_for_each_channel(channel, efx) { 1546261e4d96SJon Cooper if (channel == end_channel) 1547261e4d96SJon Cooper break; 1548261e4d96SJon Cooper efx_stop_eventq(channel); 1549261e4d96SJon Cooper if (!channel->type->keep_eventq) 1550261e4d96SJon Cooper efx_fini_eventq(channel); 1551261e4d96SJon Cooper } 1552261e4d96SJon Cooper 1553261e4d96SJon Cooper return rc; 1554d8291187SBen Hutchings } 1555d8291187SBen Hutchings 1556d8291187SBen Hutchings static void efx_soft_disable_interrupts(struct efx_nic *efx) 1557d8291187SBen Hutchings { 1558d8291187SBen Hutchings struct efx_channel *channel; 1559d8291187SBen Hutchings 1560d8291187SBen Hutchings if (efx->state == STATE_DISABLED) 1561d8291187SBen Hutchings return; 1562d8291187SBen Hutchings 1563d8291187SBen Hutchings efx_mcdi_mode_poll(efx); 1564d8291187SBen Hutchings 1565d8291187SBen Hutchings efx->irq_soft_enabled = false; 1566d8291187SBen Hutchings smp_wmb(); 1567d8291187SBen Hutchings 1568d8291187SBen Hutchings if (efx->legacy_irq) 1569d8291187SBen Hutchings synchronize_irq(efx->legacy_irq); 1570d8291187SBen Hutchings 1571d8291187SBen Hutchings efx_for_each_channel(channel, efx) { 1572d8291187SBen Hutchings if (channel->irq) 1573d8291187SBen Hutchings synchronize_irq(channel->irq); 1574d8291187SBen Hutchings 1575d8291187SBen Hutchings efx_stop_eventq(channel); 1576d8291187SBen Hutchings if (!channel->type->keep_eventq) 1577d8291187SBen Hutchings efx_fini_eventq(channel); 1578d8291187SBen Hutchings } 1579cade715fSBen Hutchings 1580cade715fSBen Hutchings /* Flush the asynchronous MCDI request queue */ 1581cade715fSBen Hutchings efx_mcdi_flush_async(efx); 1582d8291187SBen Hutchings } 1583d8291187SBen Hutchings 1584261e4d96SJon Cooper static int efx_enable_interrupts(struct efx_nic *efx) 15859f2cb71cSBen Hutchings { 1586261e4d96SJon Cooper struct efx_channel *channel, *end_channel; 1587261e4d96SJon Cooper int rc; 15889f2cb71cSBen Hutchings 15898b7325b4SBen Hutchings BUG_ON(efx->state == STATE_DISABLED); 15908b7325b4SBen Hutchings 1591b28405b0SAlexandre Rames if (efx->eeh_disabled_legacy_irq) { 1592b28405b0SAlexandre Rames enable_irq(efx->legacy_irq); 1593b28405b0SAlexandre Rames efx->eeh_disabled_legacy_irq = false; 1594b28405b0SAlexandre Rames } 1595d8291187SBen Hutchings 159686094f7fSBen Hutchings efx->type->irq_enable_master(efx); 15979f2cb71cSBen Hutchings 15989f2cb71cSBen Hutchings efx_for_each_channel(channel, efx) { 1599261e4d96SJon Cooper if (channel->type->keep_eventq) { 1600261e4d96SJon Cooper rc = efx_init_eventq(channel); 1601261e4d96SJon Cooper if (rc) 1602261e4d96SJon Cooper goto fail; 1603261e4d96SJon Cooper } 16049f2cb71cSBen Hutchings } 16059f2cb71cSBen Hutchings 1606261e4d96SJon Cooper rc = efx_soft_enable_interrupts(efx); 1607261e4d96SJon Cooper if (rc) 1608261e4d96SJon Cooper goto fail; 1609261e4d96SJon Cooper 1610261e4d96SJon Cooper return 0; 1611261e4d96SJon Cooper 1612261e4d96SJon Cooper fail: 1613261e4d96SJon Cooper end_channel = channel; 1614261e4d96SJon Cooper efx_for_each_channel(channel, efx) { 1615261e4d96SJon Cooper if (channel == end_channel) 1616261e4d96SJon Cooper break; 1617261e4d96SJon Cooper if (channel->type->keep_eventq) 1618261e4d96SJon Cooper efx_fini_eventq(channel); 1619261e4d96SJon Cooper } 1620261e4d96SJon Cooper 1621261e4d96SJon Cooper efx->type->irq_disable_non_ev(efx); 1622261e4d96SJon Cooper 1623261e4d96SJon Cooper return rc; 16249f2cb71cSBen Hutchings } 16259f2cb71cSBen Hutchings 1626d8291187SBen Hutchings static void efx_disable_interrupts(struct efx_nic *efx) 16279f2cb71cSBen Hutchings { 16289f2cb71cSBen Hutchings struct efx_channel *channel; 16299f2cb71cSBen Hutchings 1630d8291187SBen Hutchings efx_soft_disable_interrupts(efx); 16319f2cb71cSBen Hutchings 16329f2cb71cSBen Hutchings efx_for_each_channel(channel, efx) { 1633d8291187SBen Hutchings if (channel->type->keep_eventq) 16349f2cb71cSBen Hutchings efx_fini_eventq(channel); 16359f2cb71cSBen Hutchings } 1636d8291187SBen Hutchings 163786094f7fSBen Hutchings efx->type->irq_disable_non_ev(efx); 16389f2cb71cSBen Hutchings } 16399f2cb71cSBen Hutchings 1640874aeea5SJeff Kirsher static void efx_remove_interrupts(struct efx_nic *efx) 1641874aeea5SJeff Kirsher { 1642874aeea5SJeff Kirsher struct efx_channel *channel; 1643874aeea5SJeff Kirsher 1644874aeea5SJeff Kirsher /* Remove MSI/MSI-X interrupts */ 1645874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) 1646874aeea5SJeff Kirsher channel->irq = 0; 1647874aeea5SJeff Kirsher pci_disable_msi(efx->pci_dev); 1648874aeea5SJeff Kirsher pci_disable_msix(efx->pci_dev); 1649874aeea5SJeff Kirsher 1650874aeea5SJeff Kirsher /* Remove legacy interrupt */ 1651874aeea5SJeff Kirsher efx->legacy_irq = 0; 1652874aeea5SJeff Kirsher } 1653874aeea5SJeff Kirsher 1654874aeea5SJeff Kirsher static void efx_set_channels(struct efx_nic *efx) 1655874aeea5SJeff Kirsher { 1656874aeea5SJeff Kirsher struct efx_channel *channel; 1657874aeea5SJeff Kirsher struct efx_tx_queue *tx_queue; 1658874aeea5SJeff Kirsher 1659874aeea5SJeff Kirsher efx->tx_channel_offset = 1660b0fbdae1SShradha Shah efx_separate_tx_channels ? 1661b0fbdae1SShradha Shah efx->n_channels - efx->n_tx_channels : 0; 1662874aeea5SJeff Kirsher 166379d68b37SStuart Hodgson /* We need to mark which channels really have RX and TX 166479d68b37SStuart Hodgson * queues, and adjust the TX queue numbers if we have separate 1665874aeea5SJeff Kirsher * RX-only and TX-only channels. 1666874aeea5SJeff Kirsher */ 1667874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) { 166879d68b37SStuart Hodgson if (channel->channel < efx->n_rx_channels) 166979d68b37SStuart Hodgson channel->rx_queue.core_index = channel->channel; 167079d68b37SStuart Hodgson else 167179d68b37SStuart Hodgson channel->rx_queue.core_index = -1; 167279d68b37SStuart Hodgson 1673874aeea5SJeff Kirsher efx_for_each_channel_tx_queue(tx_queue, channel) 1674874aeea5SJeff Kirsher tx_queue->queue -= (efx->tx_channel_offset * 1675874aeea5SJeff Kirsher EFX_TXQ_TYPES); 1676874aeea5SJeff Kirsher } 1677874aeea5SJeff Kirsher } 1678874aeea5SJeff Kirsher 1679874aeea5SJeff Kirsher static int efx_probe_nic(struct efx_nic *efx) 1680874aeea5SJeff Kirsher { 1681874aeea5SJeff Kirsher int rc; 1682874aeea5SJeff Kirsher 1683874aeea5SJeff Kirsher netif_dbg(efx, probe, efx->net_dev, "creating NIC\n"); 1684874aeea5SJeff Kirsher 1685874aeea5SJeff Kirsher /* Carry out hardware-type specific initialisation */ 1686874aeea5SJeff Kirsher rc = efx->type->probe(efx); 1687874aeea5SJeff Kirsher if (rc) 1688874aeea5SJeff Kirsher return rc; 1689874aeea5SJeff Kirsher 1690b0fbdae1SShradha Shah do { 1691b0fbdae1SShradha Shah if (!efx->max_channels || !efx->max_tx_channels) { 1692b0fbdae1SShradha Shah netif_err(efx, drv, efx->net_dev, 1693b0fbdae1SShradha Shah "Insufficient resources to allocate" 1694b0fbdae1SShradha Shah " any channels\n"); 1695b0fbdae1SShradha Shah rc = -ENOSPC; 1696b0fbdae1SShradha Shah goto fail1; 1697b0fbdae1SShradha Shah } 1698b0fbdae1SShradha Shah 1699b0fbdae1SShradha Shah /* Determine the number of channels and queues by trying 1700b0fbdae1SShradha Shah * to hook in MSI-X interrupts. 1701b0fbdae1SShradha Shah */ 1702874aeea5SJeff Kirsher rc = efx_probe_interrupts(efx); 1703874aeea5SJeff Kirsher if (rc) 1704c15eed22SBen Hutchings goto fail1; 1705874aeea5SJeff Kirsher 170652ad762bSDaniel Pieczko efx_set_channels(efx); 170752ad762bSDaniel Pieczko 1708b0fbdae1SShradha Shah /* dimension_resources can fail with EAGAIN */ 1709c15eed22SBen Hutchings rc = efx->type->dimension_resources(efx); 1710b0fbdae1SShradha Shah if (rc != 0 && rc != -EAGAIN) 1711c15eed22SBen Hutchings goto fail2; 171228e47c49SBen Hutchings 1713b0fbdae1SShradha Shah if (rc == -EAGAIN) 1714b0fbdae1SShradha Shah /* try again with new max_channels */ 1715b0fbdae1SShradha Shah efx_remove_interrupts(efx); 1716b0fbdae1SShradha Shah 1717b0fbdae1SShradha Shah } while (rc == -EAGAIN); 1718b0fbdae1SShradha Shah 1719874aeea5SJeff Kirsher if (efx->n_channels > 1) 1720267c0157SJon Cooper netdev_rss_key_fill(&efx->rx_hash_key, 1721267c0157SJon Cooper sizeof(efx->rx_hash_key)); 1722267c0157SJon Cooper efx_set_default_rx_indir_table(efx); 1723874aeea5SJeff Kirsher 1724874aeea5SJeff Kirsher netif_set_real_num_tx_queues(efx->net_dev, efx->n_tx_channels); 1725874aeea5SJeff Kirsher netif_set_real_num_rx_queues(efx->net_dev, efx->n_rx_channels); 1726874aeea5SJeff Kirsher 1727874aeea5SJeff Kirsher /* Initialise the interrupt moderation settings */ 1728539de7c5SBert Kenward efx->irq_mod_step_us = DIV_ROUND_UP(efx->timer_quantum_ns, 1000); 17299e393b30SBen Hutchings efx_init_irq_moderation(efx, tx_irq_mod_usec, rx_irq_mod_usec, true, 17309e393b30SBen Hutchings true); 1731874aeea5SJeff Kirsher 1732874aeea5SJeff Kirsher return 0; 1733874aeea5SJeff Kirsher 1734c15eed22SBen Hutchings fail2: 1735c15eed22SBen Hutchings efx_remove_interrupts(efx); 1736c15eed22SBen Hutchings fail1: 1737874aeea5SJeff Kirsher efx->type->remove(efx); 1738874aeea5SJeff Kirsher return rc; 1739874aeea5SJeff Kirsher } 1740874aeea5SJeff Kirsher 1741874aeea5SJeff Kirsher static void efx_remove_nic(struct efx_nic *efx) 1742874aeea5SJeff Kirsher { 1743874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "destroying NIC\n"); 1744874aeea5SJeff Kirsher 1745874aeea5SJeff Kirsher efx_remove_interrupts(efx); 1746874aeea5SJeff Kirsher efx->type->remove(efx); 1747874aeea5SJeff Kirsher } 1748874aeea5SJeff Kirsher 1749add72477SBen Hutchings static int efx_probe_filters(struct efx_nic *efx) 1750add72477SBen Hutchings { 1751add72477SBen Hutchings int rc; 1752add72477SBen Hutchings 1753add72477SBen Hutchings spin_lock_init(&efx->filter_lock); 17540d322413SEdward Cree init_rwsem(&efx->filter_sem); 1755d248953aSMartin Habets mutex_lock(&efx->mac_lock); 17560d322413SEdward Cree down_write(&efx->filter_sem); 1757add72477SBen Hutchings rc = efx->type->filter_table_probe(efx); 1758add72477SBen Hutchings if (rc) 17590d322413SEdward Cree goto out_unlock; 1760add72477SBen Hutchings 1761add72477SBen Hutchings #ifdef CONFIG_RFS_ACCEL 1762add72477SBen Hutchings if (efx->type->offload_features & NETIF_F_NTUPLE) { 1763faf8dcc1SJon Cooper struct efx_channel *channel; 1764faf8dcc1SJon Cooper int i, success = 1; 1765faf8dcc1SJon Cooper 1766faf8dcc1SJon Cooper efx_for_each_channel(channel, efx) { 1767faf8dcc1SJon Cooper channel->rps_flow_id = 1768faf8dcc1SJon Cooper kcalloc(efx->type->max_rx_ip_filters, 1769faf8dcc1SJon Cooper sizeof(*channel->rps_flow_id), 1770add72477SBen Hutchings GFP_KERNEL); 1771faf8dcc1SJon Cooper if (!channel->rps_flow_id) 1772faf8dcc1SJon Cooper success = 0; 1773faf8dcc1SJon Cooper else 1774faf8dcc1SJon Cooper for (i = 0; 1775faf8dcc1SJon Cooper i < efx->type->max_rx_ip_filters; 1776faf8dcc1SJon Cooper ++i) 1777faf8dcc1SJon Cooper channel->rps_flow_id[i] = 1778faf8dcc1SJon Cooper RPS_FLOW_ID_INVALID; 1779faf8dcc1SJon Cooper } 1780faf8dcc1SJon Cooper 1781faf8dcc1SJon Cooper if (!success) { 1782faf8dcc1SJon Cooper efx_for_each_channel(channel, efx) 1783faf8dcc1SJon Cooper kfree(channel->rps_flow_id); 1784add72477SBen Hutchings efx->type->filter_table_remove(efx); 17850d322413SEdward Cree rc = -ENOMEM; 17860d322413SEdward Cree goto out_unlock; 1787add72477SBen Hutchings } 1788faf8dcc1SJon Cooper 1789faf8dcc1SJon Cooper efx->rps_expire_index = efx->rps_expire_channel = 0; 1790add72477SBen Hutchings } 1791add72477SBen Hutchings #endif 17920d322413SEdward Cree out_unlock: 17930d322413SEdward Cree up_write(&efx->filter_sem); 1794d248953aSMartin Habets mutex_unlock(&efx->mac_lock); 17950d322413SEdward Cree return rc; 1796add72477SBen Hutchings } 1797add72477SBen Hutchings 1798add72477SBen Hutchings static void efx_remove_filters(struct efx_nic *efx) 1799add72477SBen Hutchings { 1800add72477SBen Hutchings #ifdef CONFIG_RFS_ACCEL 1801faf8dcc1SJon Cooper struct efx_channel *channel; 1802faf8dcc1SJon Cooper 1803faf8dcc1SJon Cooper efx_for_each_channel(channel, efx) 1804faf8dcc1SJon Cooper kfree(channel->rps_flow_id); 1805add72477SBen Hutchings #endif 18060d322413SEdward Cree down_write(&efx->filter_sem); 1807add72477SBen Hutchings efx->type->filter_table_remove(efx); 18080d322413SEdward Cree up_write(&efx->filter_sem); 1809add72477SBen Hutchings } 1810add72477SBen Hutchings 1811add72477SBen Hutchings static void efx_restore_filters(struct efx_nic *efx) 1812add72477SBen Hutchings { 18130d322413SEdward Cree down_read(&efx->filter_sem); 1814add72477SBen Hutchings efx->type->filter_table_restore(efx); 18150d322413SEdward Cree up_read(&efx->filter_sem); 1816add72477SBen Hutchings } 1817add72477SBen Hutchings 1818874aeea5SJeff Kirsher /************************************************************************** 1819874aeea5SJeff Kirsher * 1820874aeea5SJeff Kirsher * NIC startup/shutdown 1821874aeea5SJeff Kirsher * 1822874aeea5SJeff Kirsher *************************************************************************/ 1823874aeea5SJeff Kirsher 1824874aeea5SJeff Kirsher static int efx_probe_all(struct efx_nic *efx) 1825874aeea5SJeff Kirsher { 1826874aeea5SJeff Kirsher int rc; 1827874aeea5SJeff Kirsher 1828874aeea5SJeff Kirsher rc = efx_probe_nic(efx); 1829874aeea5SJeff Kirsher if (rc) { 1830874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, "failed to create NIC\n"); 1831874aeea5SJeff Kirsher goto fail1; 1832874aeea5SJeff Kirsher } 1833874aeea5SJeff Kirsher 1834874aeea5SJeff Kirsher rc = efx_probe_port(efx); 1835874aeea5SJeff Kirsher if (rc) { 1836874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, "failed to create port\n"); 1837874aeea5SJeff Kirsher goto fail2; 1838874aeea5SJeff Kirsher } 1839874aeea5SJeff Kirsher 18407e6d06f0SBen Hutchings BUILD_BUG_ON(EFX_DEFAULT_DMAQ_SIZE < EFX_RXQ_MIN_ENT); 18417e6d06f0SBen Hutchings if (WARN_ON(EFX_DEFAULT_DMAQ_SIZE < EFX_TXQ_MIN_ENT(efx))) { 18427e6d06f0SBen Hutchings rc = -EINVAL; 18437e6d06f0SBen Hutchings goto fail3; 18447e6d06f0SBen Hutchings } 1845874aeea5SJeff Kirsher efx->rxq_entries = efx->txq_entries = EFX_DEFAULT_DMAQ_SIZE; 1846874aeea5SJeff Kirsher 18476d8aaaf6SDaniel Pieczko #ifdef CONFIG_SFC_SRIOV 18486d8aaaf6SDaniel Pieczko rc = efx->type->vswitching_probe(efx); 18496d8aaaf6SDaniel Pieczko if (rc) /* not fatal; the PF will still work fine */ 18506d8aaaf6SDaniel Pieczko netif_warn(efx, probe, efx->net_dev, 18516d8aaaf6SDaniel Pieczko "failed to setup vswitching rc=%d;" 18526d8aaaf6SDaniel Pieczko " VFs may not function\n", rc); 18536d8aaaf6SDaniel Pieczko #endif 18546d8aaaf6SDaniel Pieczko 1855874aeea5SJeff Kirsher rc = efx_probe_filters(efx); 1856874aeea5SJeff Kirsher if (rc) { 1857874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 1858874aeea5SJeff Kirsher "failed to create filter tables\n"); 18596d8aaaf6SDaniel Pieczko goto fail4; 1860874aeea5SJeff Kirsher } 1861874aeea5SJeff Kirsher 18627f967c01SBen Hutchings rc = efx_probe_channels(efx); 18637f967c01SBen Hutchings if (rc) 18646d8aaaf6SDaniel Pieczko goto fail5; 18657f967c01SBen Hutchings 1866874aeea5SJeff Kirsher return 0; 1867874aeea5SJeff Kirsher 18686d8aaaf6SDaniel Pieczko fail5: 18697f967c01SBen Hutchings efx_remove_filters(efx); 18706d8aaaf6SDaniel Pieczko fail4: 18716d8aaaf6SDaniel Pieczko #ifdef CONFIG_SFC_SRIOV 18726d8aaaf6SDaniel Pieczko efx->type->vswitching_remove(efx); 18736d8aaaf6SDaniel Pieczko #endif 1874874aeea5SJeff Kirsher fail3: 1875874aeea5SJeff Kirsher efx_remove_port(efx); 1876874aeea5SJeff Kirsher fail2: 1877874aeea5SJeff Kirsher efx_remove_nic(efx); 1878874aeea5SJeff Kirsher fail1: 1879874aeea5SJeff Kirsher return rc; 1880874aeea5SJeff Kirsher } 1881874aeea5SJeff Kirsher 18828b7325b4SBen Hutchings /* If the interface is supposed to be running but is not, start 18838b7325b4SBen Hutchings * the hardware and software data path, regular activity for the port 18848b7325b4SBen Hutchings * (MAC statistics, link polling, etc.) and schedule the port to be 18858b7325b4SBen Hutchings * reconfigured. Interrupts must already be enabled. This function 18868b7325b4SBen Hutchings * is safe to call multiple times, so long as the NIC is not disabled. 18878b7325b4SBen Hutchings * Requires the RTNL lock. 18889f2cb71cSBen Hutchings */ 1889874aeea5SJeff Kirsher static void efx_start_all(struct efx_nic *efx) 1890874aeea5SJeff Kirsher { 1891874aeea5SJeff Kirsher EFX_ASSERT_RESET_SERIALISED(efx); 18928b7325b4SBen Hutchings BUG_ON(efx->state == STATE_DISABLED); 1893874aeea5SJeff Kirsher 1894874aeea5SJeff Kirsher /* Check that it is appropriate to restart the interface. All 1895874aeea5SJeff Kirsher * of these flags are safe to read under just the rtnl lock */ 1896e283546cSEdward Cree if (efx->port_enabled || !netif_running(efx->net_dev) || 1897e283546cSEdward Cree efx->reset_pending) 1898874aeea5SJeff Kirsher return; 1899874aeea5SJeff Kirsher 1900874aeea5SJeff Kirsher efx_start_port(efx); 19019f2cb71cSBen Hutchings efx_start_datapath(efx); 1902874aeea5SJeff Kirsher 1903626950dbSAlexandre Rames /* Start the hardware monitor if there is one */ 1904626950dbSAlexandre Rames if (efx->type->monitor != NULL) 1905874aeea5SJeff Kirsher queue_delayed_work(efx->workqueue, &efx->monitor_work, 1906874aeea5SJeff Kirsher efx_monitor_interval); 1907626950dbSAlexandre Rames 19085a6681e2SEdward Cree /* Link state detection is normally event-driven; we have 1909626950dbSAlexandre Rames * to poll now because we could have missed a change 1910626950dbSAlexandre Rames */ 1911874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 1912874aeea5SJeff Kirsher if (efx->phy_op->poll(efx)) 1913874aeea5SJeff Kirsher efx_link_status_changed(efx); 1914874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 1915874aeea5SJeff Kirsher 1916874aeea5SJeff Kirsher efx->type->start_stats(efx); 1917f8f3b5aeSJon Cooper efx->type->pull_stats(efx); 1918f8f3b5aeSJon Cooper spin_lock_bh(&efx->stats_lock); 1919f8f3b5aeSJon Cooper efx->type->update_stats(efx, NULL, NULL); 1920f8f3b5aeSJon Cooper spin_unlock_bh(&efx->stats_lock); 1921874aeea5SJeff Kirsher } 1922874aeea5SJeff Kirsher 19238b7325b4SBen Hutchings /* Quiesce the hardware and software data path, and regular activity 19248b7325b4SBen Hutchings * for the port without bringing the link down. Safe to call multiple 19258b7325b4SBen Hutchings * times with the NIC in almost any state, but interrupts should be 19268b7325b4SBen Hutchings * enabled. Requires the RTNL lock. 19278b7325b4SBen Hutchings */ 1928874aeea5SJeff Kirsher static void efx_stop_all(struct efx_nic *efx) 1929874aeea5SJeff Kirsher { 1930874aeea5SJeff Kirsher EFX_ASSERT_RESET_SERIALISED(efx); 1931874aeea5SJeff Kirsher 1932874aeea5SJeff Kirsher /* port_enabled can be read safely under the rtnl lock */ 1933874aeea5SJeff Kirsher if (!efx->port_enabled) 1934874aeea5SJeff Kirsher return; 1935874aeea5SJeff Kirsher 1936f8f3b5aeSJon Cooper /* update stats before we go down so we can accurately count 1937f8f3b5aeSJon Cooper * rx_nodesc_drops 1938f8f3b5aeSJon Cooper */ 1939f8f3b5aeSJon Cooper efx->type->pull_stats(efx); 1940f8f3b5aeSJon Cooper spin_lock_bh(&efx->stats_lock); 1941f8f3b5aeSJon Cooper efx->type->update_stats(efx, NULL, NULL); 1942f8f3b5aeSJon Cooper spin_unlock_bh(&efx->stats_lock); 1943874aeea5SJeff Kirsher efx->type->stop_stats(efx); 1944874aeea5SJeff Kirsher efx_stop_port(efx); 1945874aeea5SJeff Kirsher 194629c69a48SBen Hutchings /* Stop the kernel transmit interface. This is only valid if 194729c69a48SBen Hutchings * the device is stopped or detached; otherwise the watchdog 194829c69a48SBen Hutchings * may fire immediately. 194929c69a48SBen Hutchings */ 195029c69a48SBen Hutchings WARN_ON(netif_running(efx->net_dev) && 195129c69a48SBen Hutchings netif_device_present(efx->net_dev)); 19529f2cb71cSBen Hutchings netif_tx_disable(efx->net_dev); 19539f2cb71cSBen Hutchings 19549f2cb71cSBen Hutchings efx_stop_datapath(efx); 1955874aeea5SJeff Kirsher } 1956874aeea5SJeff Kirsher 1957874aeea5SJeff Kirsher static void efx_remove_all(struct efx_nic *efx) 1958874aeea5SJeff Kirsher { 1959874aeea5SJeff Kirsher efx_remove_channels(efx); 19607f967c01SBen Hutchings efx_remove_filters(efx); 19616d8aaaf6SDaniel Pieczko #ifdef CONFIG_SFC_SRIOV 19626d8aaaf6SDaniel Pieczko efx->type->vswitching_remove(efx); 19636d8aaaf6SDaniel Pieczko #endif 1964874aeea5SJeff Kirsher efx_remove_port(efx); 1965874aeea5SJeff Kirsher efx_remove_nic(efx); 1966874aeea5SJeff Kirsher } 1967874aeea5SJeff Kirsher 1968874aeea5SJeff Kirsher /************************************************************************** 1969874aeea5SJeff Kirsher * 1970874aeea5SJeff Kirsher * Interrupt moderation 1971874aeea5SJeff Kirsher * 1972874aeea5SJeff Kirsher **************************************************************************/ 1973539de7c5SBert Kenward unsigned int efx_usecs_to_ticks(struct efx_nic *efx, unsigned int usecs) 1974874aeea5SJeff Kirsher { 1975b548f976SBen Hutchings if (usecs == 0) 1976b548f976SBen Hutchings return 0; 1977539de7c5SBert Kenward if (usecs * 1000 < efx->timer_quantum_ns) 1978874aeea5SJeff Kirsher return 1; /* never round down to 0 */ 1979539de7c5SBert Kenward return usecs * 1000 / efx->timer_quantum_ns; 1980539de7c5SBert Kenward } 1981539de7c5SBert Kenward 1982539de7c5SBert Kenward unsigned int efx_ticks_to_usecs(struct efx_nic *efx, unsigned int ticks) 1983539de7c5SBert Kenward { 1984539de7c5SBert Kenward /* We must round up when converting ticks to microseconds 1985539de7c5SBert Kenward * because we round down when converting the other way. 1986539de7c5SBert Kenward */ 1987539de7c5SBert Kenward return DIV_ROUND_UP(ticks * efx->timer_quantum_ns, 1000); 1988874aeea5SJeff Kirsher } 1989874aeea5SJeff Kirsher 1990874aeea5SJeff Kirsher /* Set interrupt moderation parameters */ 19919e393b30SBen Hutchings int efx_init_irq_moderation(struct efx_nic *efx, unsigned int tx_usecs, 19929e393b30SBen Hutchings unsigned int rx_usecs, bool rx_adaptive, 19939e393b30SBen Hutchings bool rx_may_override_tx) 1994874aeea5SJeff Kirsher { 1995874aeea5SJeff Kirsher struct efx_channel *channel; 1996d95e329aSBert Kenward unsigned int timer_max_us; 1997d95e329aSBert Kenward 1998874aeea5SJeff Kirsher EFX_ASSERT_RESET_SERIALISED(efx); 1999874aeea5SJeff Kirsher 2000d95e329aSBert Kenward timer_max_us = efx->timer_max_ns / 1000; 2001d95e329aSBert Kenward 2002d95e329aSBert Kenward if (tx_usecs > timer_max_us || rx_usecs > timer_max_us) 20039e393b30SBen Hutchings return -EINVAL; 20049e393b30SBen Hutchings 2005539de7c5SBert Kenward if (tx_usecs != rx_usecs && efx->tx_channel_offset == 0 && 20069e393b30SBen Hutchings !rx_may_override_tx) { 20079e393b30SBen Hutchings netif_err(efx, drv, efx->net_dev, "Channels are shared. " 20089e393b30SBen Hutchings "RX and TX IRQ moderation must be equal\n"); 20099e393b30SBen Hutchings return -EINVAL; 20109e393b30SBen Hutchings } 20119e393b30SBen Hutchings 2012874aeea5SJeff Kirsher efx->irq_rx_adaptive = rx_adaptive; 2013539de7c5SBert Kenward efx->irq_rx_moderation_us = rx_usecs; 2014874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) { 2015874aeea5SJeff Kirsher if (efx_channel_has_rx_queue(channel)) 2016539de7c5SBert Kenward channel->irq_moderation_us = rx_usecs; 2017874aeea5SJeff Kirsher else if (efx_channel_has_tx_queues(channel)) 2018539de7c5SBert Kenward channel->irq_moderation_us = tx_usecs; 2019874aeea5SJeff Kirsher } 20209e393b30SBen Hutchings 20219e393b30SBen Hutchings return 0; 2022874aeea5SJeff Kirsher } 2023874aeea5SJeff Kirsher 2024a0c4faf5SBen Hutchings void efx_get_irq_moderation(struct efx_nic *efx, unsigned int *tx_usecs, 2025a0c4faf5SBen Hutchings unsigned int *rx_usecs, bool *rx_adaptive) 2026a0c4faf5SBen Hutchings { 2027a0c4faf5SBen Hutchings *rx_adaptive = efx->irq_rx_adaptive; 2028539de7c5SBert Kenward *rx_usecs = efx->irq_rx_moderation_us; 2029a0c4faf5SBen Hutchings 2030a0c4faf5SBen Hutchings /* If channels are shared between RX and TX, so is IRQ 2031a0c4faf5SBen Hutchings * moderation. Otherwise, IRQ moderation is the same for all 2032a0c4faf5SBen Hutchings * TX channels and is not adaptive. 2033a0c4faf5SBen Hutchings */ 2034539de7c5SBert Kenward if (efx->tx_channel_offset == 0) { 2035a0c4faf5SBen Hutchings *tx_usecs = *rx_usecs; 2036539de7c5SBert Kenward } else { 2037539de7c5SBert Kenward struct efx_channel *tx_channel; 2038539de7c5SBert Kenward 2039539de7c5SBert Kenward tx_channel = efx->channel[efx->tx_channel_offset]; 2040539de7c5SBert Kenward *tx_usecs = tx_channel->irq_moderation_us; 2041539de7c5SBert Kenward } 2042a0c4faf5SBen Hutchings } 2043a0c4faf5SBen Hutchings 2044874aeea5SJeff Kirsher /************************************************************************** 2045874aeea5SJeff Kirsher * 2046874aeea5SJeff Kirsher * Hardware monitor 2047874aeea5SJeff Kirsher * 2048874aeea5SJeff Kirsher **************************************************************************/ 2049874aeea5SJeff Kirsher 2050874aeea5SJeff Kirsher /* Run periodically off the general workqueue */ 2051874aeea5SJeff Kirsher static void efx_monitor(struct work_struct *data) 2052874aeea5SJeff Kirsher { 2053874aeea5SJeff Kirsher struct efx_nic *efx = container_of(data, struct efx_nic, 2054874aeea5SJeff Kirsher monitor_work.work); 2055874aeea5SJeff Kirsher 2056874aeea5SJeff Kirsher netif_vdbg(efx, timer, efx->net_dev, 2057874aeea5SJeff Kirsher "hardware monitor executing on CPU %d\n", 2058874aeea5SJeff Kirsher raw_smp_processor_id()); 2059874aeea5SJeff Kirsher BUG_ON(efx->type->monitor == NULL); 2060874aeea5SJeff Kirsher 2061874aeea5SJeff Kirsher /* If the mac_lock is already held then it is likely a port 2062874aeea5SJeff Kirsher * reconfiguration is already in place, which will likely do 2063874aeea5SJeff Kirsher * most of the work of monitor() anyway. */ 2064874aeea5SJeff Kirsher if (mutex_trylock(&efx->mac_lock)) { 2065874aeea5SJeff Kirsher if (efx->port_enabled) 2066874aeea5SJeff Kirsher efx->type->monitor(efx); 2067874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 2068874aeea5SJeff Kirsher } 2069874aeea5SJeff Kirsher 2070874aeea5SJeff Kirsher queue_delayed_work(efx->workqueue, &efx->monitor_work, 2071874aeea5SJeff Kirsher efx_monitor_interval); 2072874aeea5SJeff Kirsher } 2073874aeea5SJeff Kirsher 2074874aeea5SJeff Kirsher /************************************************************************** 2075874aeea5SJeff Kirsher * 2076874aeea5SJeff Kirsher * ioctls 2077874aeea5SJeff Kirsher * 2078874aeea5SJeff Kirsher *************************************************************************/ 2079874aeea5SJeff Kirsher 2080874aeea5SJeff Kirsher /* Net device ioctl 2081874aeea5SJeff Kirsher * Context: process, rtnl_lock() held. 2082874aeea5SJeff Kirsher */ 2083874aeea5SJeff Kirsher static int efx_ioctl(struct net_device *net_dev, struct ifreq *ifr, int cmd) 2084874aeea5SJeff Kirsher { 2085874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 2086874aeea5SJeff Kirsher struct mii_ioctl_data *data = if_mii(ifr); 2087874aeea5SJeff Kirsher 20887c236c43SStuart Hodgson if (cmd == SIOCSHWTSTAMP) 2089433dc9b3SBen Hutchings return efx_ptp_set_ts_config(efx, ifr); 2090433dc9b3SBen Hutchings if (cmd == SIOCGHWTSTAMP) 2091433dc9b3SBen Hutchings return efx_ptp_get_ts_config(efx, ifr); 20927c236c43SStuart Hodgson 2093874aeea5SJeff Kirsher /* Convert phy_id from older PRTAD/DEVAD format */ 2094874aeea5SJeff Kirsher if ((cmd == SIOCGMIIREG || cmd == SIOCSMIIREG) && 2095874aeea5SJeff Kirsher (data->phy_id & 0xfc00) == 0x0400) 2096874aeea5SJeff Kirsher data->phy_id ^= MDIO_PHY_ID_C45 | 0x0400; 2097874aeea5SJeff Kirsher 2098874aeea5SJeff Kirsher return mdio_mii_ioctl(&efx->mdio, data, cmd); 2099874aeea5SJeff Kirsher } 2100874aeea5SJeff Kirsher 2101874aeea5SJeff Kirsher /************************************************************************** 2102874aeea5SJeff Kirsher * 2103874aeea5SJeff Kirsher * NAPI interface 2104874aeea5SJeff Kirsher * 2105874aeea5SJeff Kirsher **************************************************************************/ 2106874aeea5SJeff Kirsher 21077f967c01SBen Hutchings static void efx_init_napi_channel(struct efx_channel *channel) 2108874aeea5SJeff Kirsher { 21097f967c01SBen Hutchings struct efx_nic *efx = channel->efx; 2110874aeea5SJeff Kirsher 2111874aeea5SJeff Kirsher channel->napi_dev = efx->net_dev; 2112874aeea5SJeff Kirsher netif_napi_add(channel->napi_dev, &channel->napi_str, 2113874aeea5SJeff Kirsher efx_poll, napi_weight); 2114874aeea5SJeff Kirsher } 21157f967c01SBen Hutchings 21167f967c01SBen Hutchings static void efx_init_napi(struct efx_nic *efx) 21177f967c01SBen Hutchings { 21187f967c01SBen Hutchings struct efx_channel *channel; 21197f967c01SBen Hutchings 21207f967c01SBen Hutchings efx_for_each_channel(channel, efx) 21217f967c01SBen Hutchings efx_init_napi_channel(channel); 2122874aeea5SJeff Kirsher } 2123874aeea5SJeff Kirsher 2124874aeea5SJeff Kirsher static void efx_fini_napi_channel(struct efx_channel *channel) 2125874aeea5SJeff Kirsher { 2126973334a1SEric Dumazet if (channel->napi_dev) 2127874aeea5SJeff Kirsher netif_napi_del(&channel->napi_str); 2128973334a1SEric Dumazet 2129874aeea5SJeff Kirsher channel->napi_dev = NULL; 2130874aeea5SJeff Kirsher } 2131874aeea5SJeff Kirsher 2132874aeea5SJeff Kirsher static void efx_fini_napi(struct efx_nic *efx) 2133874aeea5SJeff Kirsher { 2134874aeea5SJeff Kirsher struct efx_channel *channel; 2135874aeea5SJeff Kirsher 2136874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) 2137874aeea5SJeff Kirsher efx_fini_napi_channel(channel); 2138874aeea5SJeff Kirsher } 2139874aeea5SJeff Kirsher 2140874aeea5SJeff Kirsher /************************************************************************** 2141874aeea5SJeff Kirsher * 2142874aeea5SJeff Kirsher * Kernel netpoll interface 2143874aeea5SJeff Kirsher * 2144874aeea5SJeff Kirsher *************************************************************************/ 2145874aeea5SJeff Kirsher 2146874aeea5SJeff Kirsher #ifdef CONFIG_NET_POLL_CONTROLLER 2147874aeea5SJeff Kirsher 2148874aeea5SJeff Kirsher /* Although in the common case interrupts will be disabled, this is not 2149874aeea5SJeff Kirsher * guaranteed. However, all our work happens inside the NAPI callback, 2150874aeea5SJeff Kirsher * so no locking is required. 2151874aeea5SJeff Kirsher */ 2152874aeea5SJeff Kirsher static void efx_netpoll(struct net_device *net_dev) 2153874aeea5SJeff Kirsher { 2154874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 2155874aeea5SJeff Kirsher struct efx_channel *channel; 2156874aeea5SJeff Kirsher 2157874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) 2158874aeea5SJeff Kirsher efx_schedule_channel(channel); 2159874aeea5SJeff Kirsher } 2160874aeea5SJeff Kirsher 2161874aeea5SJeff Kirsher #endif 2162874aeea5SJeff Kirsher 2163874aeea5SJeff Kirsher /************************************************************************** 2164874aeea5SJeff Kirsher * 2165874aeea5SJeff Kirsher * Kernel net device interface 2166874aeea5SJeff Kirsher * 2167874aeea5SJeff Kirsher *************************************************************************/ 2168874aeea5SJeff Kirsher 2169874aeea5SJeff Kirsher /* Context: process, rtnl_lock() held. */ 2170e340be92SShradha Shah int efx_net_open(struct net_device *net_dev) 2171874aeea5SJeff Kirsher { 2172874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 21738b7325b4SBen Hutchings int rc; 21748b7325b4SBen Hutchings 2175874aeea5SJeff Kirsher netif_dbg(efx, ifup, efx->net_dev, "opening device on CPU %d\n", 2176874aeea5SJeff Kirsher raw_smp_processor_id()); 2177874aeea5SJeff Kirsher 21788b7325b4SBen Hutchings rc = efx_check_disabled(efx); 21798b7325b4SBen Hutchings if (rc) 21808b7325b4SBen Hutchings return rc; 2181874aeea5SJeff Kirsher if (efx->phy_mode & PHY_MODE_SPECIAL) 2182874aeea5SJeff Kirsher return -EBUSY; 2183874aeea5SJeff Kirsher if (efx_mcdi_poll_reboot(efx) && efx_reset(efx, RESET_TYPE_ALL)) 2184874aeea5SJeff Kirsher return -EIO; 2185874aeea5SJeff Kirsher 2186874aeea5SJeff Kirsher /* Notify the kernel of the link state polled during driver load, 2187874aeea5SJeff Kirsher * before the monitor starts running */ 2188874aeea5SJeff Kirsher efx_link_status_changed(efx); 2189874aeea5SJeff Kirsher 2190874aeea5SJeff Kirsher efx_start_all(efx); 21919c568fd8SPeter Dunning if (efx->state == STATE_DISABLED || efx->reset_pending) 21929c568fd8SPeter Dunning netif_device_detach(efx->net_dev); 2193dd40781eSBen Hutchings efx_selftest_async_start(efx); 2194874aeea5SJeff Kirsher return 0; 2195874aeea5SJeff Kirsher } 2196874aeea5SJeff Kirsher 2197874aeea5SJeff Kirsher /* Context: process, rtnl_lock() held. 2198874aeea5SJeff Kirsher * Note that the kernel will ignore our return code; this method 2199874aeea5SJeff Kirsher * should really be a void. 2200874aeea5SJeff Kirsher */ 2201e340be92SShradha Shah int efx_net_stop(struct net_device *net_dev) 2202874aeea5SJeff Kirsher { 2203874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 2204874aeea5SJeff Kirsher 2205874aeea5SJeff Kirsher netif_dbg(efx, ifdown, efx->net_dev, "closing on CPU %d\n", 2206874aeea5SJeff Kirsher raw_smp_processor_id()); 2207874aeea5SJeff Kirsher 2208874aeea5SJeff Kirsher /* Stop the device and flush all the channels */ 2209874aeea5SJeff Kirsher efx_stop_all(efx); 2210874aeea5SJeff Kirsher 2211874aeea5SJeff Kirsher return 0; 2212874aeea5SJeff Kirsher } 2213874aeea5SJeff Kirsher 2214874aeea5SJeff Kirsher /* Context: process, dev_base_lock or RTNL held, non-blocking. */ 2215bc1f4470Sstephen hemminger static void efx_net_stats(struct net_device *net_dev, 22162aa9ef11SBen Hutchings struct rtnl_link_stats64 *stats) 2217874aeea5SJeff Kirsher { 2218874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 2219874aeea5SJeff Kirsher 2220874aeea5SJeff Kirsher spin_lock_bh(&efx->stats_lock); 2221cd0ecc9aSBen Hutchings efx->type->update_stats(efx, NULL, stats); 22221cb34522SBen Hutchings spin_unlock_bh(&efx->stats_lock); 2223874aeea5SJeff Kirsher } 2224874aeea5SJeff Kirsher 2225874aeea5SJeff Kirsher /* Context: netif_tx_lock held, BHs disabled. */ 2226874aeea5SJeff Kirsher static void efx_watchdog(struct net_device *net_dev) 2227874aeea5SJeff Kirsher { 2228874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 2229874aeea5SJeff Kirsher 2230874aeea5SJeff Kirsher netif_err(efx, tx_err, efx->net_dev, 2231874aeea5SJeff Kirsher "TX stuck with port_enabled=%d: resetting channels\n", 2232874aeea5SJeff Kirsher efx->port_enabled); 2233874aeea5SJeff Kirsher 2234874aeea5SJeff Kirsher efx_schedule_reset(efx, RESET_TYPE_TX_WATCHDOG); 2235874aeea5SJeff Kirsher } 2236874aeea5SJeff Kirsher 2237874aeea5SJeff Kirsher 2238874aeea5SJeff Kirsher /* Context: process, rtnl_lock() held. */ 2239874aeea5SJeff Kirsher static int efx_change_mtu(struct net_device *net_dev, int new_mtu) 2240874aeea5SJeff Kirsher { 2241874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 22428b7325b4SBen Hutchings int rc; 2243874aeea5SJeff Kirsher 22448b7325b4SBen Hutchings rc = efx_check_disabled(efx); 22458b7325b4SBen Hutchings if (rc) 22468b7325b4SBen Hutchings return rc; 2247874aeea5SJeff Kirsher 2248874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "changing MTU to %d\n", new_mtu); 2249874aeea5SJeff Kirsher 225029c69a48SBen Hutchings efx_device_detach_sync(efx); 225129c69a48SBen Hutchings efx_stop_all(efx); 225229c69a48SBen Hutchings 2253874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 2254874aeea5SJeff Kirsher net_dev->mtu = new_mtu; 22550d322413SEdward Cree efx_mac_reconfigure(efx); 2256874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 2257874aeea5SJeff Kirsher 2258874aeea5SJeff Kirsher efx_start_all(efx); 22599c568fd8SPeter Dunning efx_device_attach_if_not_resetting(efx); 22606c8eef4aSBen Hutchings return 0; 2261874aeea5SJeff Kirsher } 2262874aeea5SJeff Kirsher 2263874aeea5SJeff Kirsher static int efx_set_mac_address(struct net_device *net_dev, void *data) 2264874aeea5SJeff Kirsher { 2265874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 2266874aeea5SJeff Kirsher struct sockaddr *addr = data; 2267e0b3ae30SBen Hutchings u8 *new_addr = addr->sa_data; 2268cfc77c2fSShradha Shah u8 old_addr[6]; 2269cfc77c2fSShradha Shah int rc; 2270874aeea5SJeff Kirsher 2271874aeea5SJeff Kirsher if (!is_valid_ether_addr(new_addr)) { 2272874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, 2273874aeea5SJeff Kirsher "invalid ethernet MAC address requested: %pM\n", 2274874aeea5SJeff Kirsher new_addr); 2275504f9b5aSDanny Kukawka return -EADDRNOTAVAIL; 2276874aeea5SJeff Kirsher } 2277874aeea5SJeff Kirsher 2278cfc77c2fSShradha Shah /* save old address */ 2279cfc77c2fSShradha Shah ether_addr_copy(old_addr, net_dev->dev_addr); 2280cd84ff4dSEdward Cree ether_addr_copy(net_dev->dev_addr, new_addr); 2281910c8789SShradha Shah if (efx->type->set_mac_address) { 2282910c8789SShradha Shah rc = efx->type->set_mac_address(efx); 2283cfc77c2fSShradha Shah if (rc) { 2284cfc77c2fSShradha Shah ether_addr_copy(net_dev->dev_addr, old_addr); 2285cfc77c2fSShradha Shah return rc; 2286cfc77c2fSShradha Shah } 2287cfc77c2fSShradha Shah } 2288874aeea5SJeff Kirsher 2289874aeea5SJeff Kirsher /* Reconfigure the MAC */ 2290874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 22910d322413SEdward Cree efx_mac_reconfigure(efx); 2292874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 2293874aeea5SJeff Kirsher 2294874aeea5SJeff Kirsher return 0; 2295874aeea5SJeff Kirsher } 2296874aeea5SJeff Kirsher 2297874aeea5SJeff Kirsher /* Context: netif_addr_lock held, BHs disabled. */ 22980fca8c97SBen Hutchings static void efx_set_rx_mode(struct net_device *net_dev) 2299874aeea5SJeff Kirsher { 2300874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 2301874aeea5SJeff Kirsher 2302874aeea5SJeff Kirsher if (efx->port_enabled) 2303874aeea5SJeff Kirsher queue_work(efx->workqueue, &efx->mac_work); 2304874aeea5SJeff Kirsher /* Otherwise efx_start_port() will do this */ 2305874aeea5SJeff Kirsher } 2306874aeea5SJeff Kirsher 2307c8f44affSMichał Mirosław static int efx_set_features(struct net_device *net_dev, netdev_features_t data) 2308874aeea5SJeff Kirsher { 2309874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 23104a53ea8aSAndrew Rybchenko int rc; 2311874aeea5SJeff Kirsher 2312874aeea5SJeff Kirsher /* If disabling RX n-tuple filtering, clear existing filters */ 23134a53ea8aSAndrew Rybchenko if (net_dev->features & ~data & NETIF_F_NTUPLE) { 23144a53ea8aSAndrew Rybchenko rc = efx->type->filter_clear_rx(efx, EFX_FILTER_PRI_MANUAL); 23154a53ea8aSAndrew Rybchenko if (rc) 23164a53ea8aSAndrew Rybchenko return rc; 23174a53ea8aSAndrew Rybchenko } 23184a53ea8aSAndrew Rybchenko 23196978729fSEdward Cree /* If Rx VLAN filter is changed, update filters via mac_reconfigure. 23206978729fSEdward Cree * If rx-fcs is changed, mac_reconfigure updates that too. 23216978729fSEdward Cree */ 23226978729fSEdward Cree if ((net_dev->features ^ data) & (NETIF_F_HW_VLAN_CTAG_FILTER | 23236978729fSEdward Cree NETIF_F_RXFCS)) { 23244a53ea8aSAndrew Rybchenko /* efx_set_rx_mode() will schedule MAC work to update filters 23254a53ea8aSAndrew Rybchenko * when a new features are finally set in net_dev. 23264a53ea8aSAndrew Rybchenko */ 23274a53ea8aSAndrew Rybchenko efx_set_rx_mode(net_dev); 23284a53ea8aSAndrew Rybchenko } 2329874aeea5SJeff Kirsher 2330874aeea5SJeff Kirsher return 0; 2331874aeea5SJeff Kirsher } 2332874aeea5SJeff Kirsher 2333b40296fcSWei Yongjun static int efx_get_phys_port_id(struct net_device *net_dev, 233408a7b29bSBert Kenward struct netdev_phys_item_id *ppid) 233508a7b29bSBert Kenward { 233608a7b29bSBert Kenward struct efx_nic *efx = netdev_priv(net_dev); 233708a7b29bSBert Kenward 233808a7b29bSBert Kenward if (efx->type->get_phys_port_id) 233908a7b29bSBert Kenward return efx->type->get_phys_port_id(efx, ppid); 234008a7b29bSBert Kenward else 234108a7b29bSBert Kenward return -EOPNOTSUPP; 234208a7b29bSBert Kenward } 234308a7b29bSBert Kenward 2344ac019f08SBert Kenward static int efx_get_phys_port_name(struct net_device *net_dev, 2345ac019f08SBert Kenward char *name, size_t len) 2346ac019f08SBert Kenward { 2347ac019f08SBert Kenward struct efx_nic *efx = netdev_priv(net_dev); 2348ac019f08SBert Kenward 2349ac019f08SBert Kenward if (snprintf(name, len, "p%u", efx->port_num) >= len) 2350ac019f08SBert Kenward return -EINVAL; 2351ac019f08SBert Kenward return 0; 2352ac019f08SBert Kenward } 2353ac019f08SBert Kenward 23544a53ea8aSAndrew Rybchenko static int efx_vlan_rx_add_vid(struct net_device *net_dev, __be16 proto, u16 vid) 23554a53ea8aSAndrew Rybchenko { 23564a53ea8aSAndrew Rybchenko struct efx_nic *efx = netdev_priv(net_dev); 23574a53ea8aSAndrew Rybchenko 23584a53ea8aSAndrew Rybchenko if (efx->type->vlan_rx_add_vid) 23594a53ea8aSAndrew Rybchenko return efx->type->vlan_rx_add_vid(efx, proto, vid); 23604a53ea8aSAndrew Rybchenko else 23614a53ea8aSAndrew Rybchenko return -EOPNOTSUPP; 23624a53ea8aSAndrew Rybchenko } 23634a53ea8aSAndrew Rybchenko 23644a53ea8aSAndrew Rybchenko static int efx_vlan_rx_kill_vid(struct net_device *net_dev, __be16 proto, u16 vid) 23654a53ea8aSAndrew Rybchenko { 23664a53ea8aSAndrew Rybchenko struct efx_nic *efx = netdev_priv(net_dev); 23674a53ea8aSAndrew Rybchenko 23684a53ea8aSAndrew Rybchenko if (efx->type->vlan_rx_kill_vid) 23694a53ea8aSAndrew Rybchenko return efx->type->vlan_rx_kill_vid(efx, proto, vid); 23704a53ea8aSAndrew Rybchenko else 23714a53ea8aSAndrew Rybchenko return -EOPNOTSUPP; 23724a53ea8aSAndrew Rybchenko } 23734a53ea8aSAndrew Rybchenko 2374e5fbd977SJon Cooper static int efx_udp_tunnel_type_map(enum udp_parsable_tunnel_type in) 2375e5fbd977SJon Cooper { 2376e5fbd977SJon Cooper switch (in) { 2377e5fbd977SJon Cooper case UDP_TUNNEL_TYPE_VXLAN: 2378e5fbd977SJon Cooper return TUNNEL_ENCAP_UDP_PORT_ENTRY_VXLAN; 2379e5fbd977SJon Cooper case UDP_TUNNEL_TYPE_GENEVE: 2380e5fbd977SJon Cooper return TUNNEL_ENCAP_UDP_PORT_ENTRY_GENEVE; 2381e5fbd977SJon Cooper default: 2382e5fbd977SJon Cooper return -1; 2383e5fbd977SJon Cooper } 2384e5fbd977SJon Cooper } 2385e5fbd977SJon Cooper 2386e5fbd977SJon Cooper static void efx_udp_tunnel_add(struct net_device *dev, struct udp_tunnel_info *ti) 2387e5fbd977SJon Cooper { 2388e5fbd977SJon Cooper struct efx_nic *efx = netdev_priv(dev); 2389e5fbd977SJon Cooper struct efx_udp_tunnel tnl; 2390e5fbd977SJon Cooper int efx_tunnel_type; 2391e5fbd977SJon Cooper 2392e5fbd977SJon Cooper efx_tunnel_type = efx_udp_tunnel_type_map(ti->type); 2393e5fbd977SJon Cooper if (efx_tunnel_type < 0) 2394e5fbd977SJon Cooper return; 2395e5fbd977SJon Cooper 2396e5fbd977SJon Cooper tnl.type = (u16)efx_tunnel_type; 2397e5fbd977SJon Cooper tnl.port = ti->port; 2398e5fbd977SJon Cooper 2399e5fbd977SJon Cooper if (efx->type->udp_tnl_add_port) 2400e5fbd977SJon Cooper (void)efx->type->udp_tnl_add_port(efx, tnl); 2401e5fbd977SJon Cooper } 2402e5fbd977SJon Cooper 2403e5fbd977SJon Cooper static void efx_udp_tunnel_del(struct net_device *dev, struct udp_tunnel_info *ti) 2404e5fbd977SJon Cooper { 2405e5fbd977SJon Cooper struct efx_nic *efx = netdev_priv(dev); 2406e5fbd977SJon Cooper struct efx_udp_tunnel tnl; 2407e5fbd977SJon Cooper int efx_tunnel_type; 2408e5fbd977SJon Cooper 2409e5fbd977SJon Cooper efx_tunnel_type = efx_udp_tunnel_type_map(ti->type); 2410e5fbd977SJon Cooper if (efx_tunnel_type < 0) 2411e5fbd977SJon Cooper return; 2412e5fbd977SJon Cooper 2413e5fbd977SJon Cooper tnl.type = (u16)efx_tunnel_type; 2414e5fbd977SJon Cooper tnl.port = ti->port; 2415e5fbd977SJon Cooper 2416c04ca616SDan Carpenter if (efx->type->udp_tnl_del_port) 2417e5fbd977SJon Cooper (void)efx->type->udp_tnl_del_port(efx, tnl); 2418e5fbd977SJon Cooper } 2419e5fbd977SJon Cooper 24207fa8d547SShradha Shah static const struct net_device_ops efx_netdev_ops = { 2421874aeea5SJeff Kirsher .ndo_open = efx_net_open, 2422874aeea5SJeff Kirsher .ndo_stop = efx_net_stop, 2423874aeea5SJeff Kirsher .ndo_get_stats64 = efx_net_stats, 2424874aeea5SJeff Kirsher .ndo_tx_timeout = efx_watchdog, 2425874aeea5SJeff Kirsher .ndo_start_xmit = efx_hard_start_xmit, 2426874aeea5SJeff Kirsher .ndo_validate_addr = eth_validate_addr, 2427874aeea5SJeff Kirsher .ndo_do_ioctl = efx_ioctl, 2428874aeea5SJeff Kirsher .ndo_change_mtu = efx_change_mtu, 2429874aeea5SJeff Kirsher .ndo_set_mac_address = efx_set_mac_address, 24300fca8c97SBen Hutchings .ndo_set_rx_mode = efx_set_rx_mode, 2431874aeea5SJeff Kirsher .ndo_set_features = efx_set_features, 24324a53ea8aSAndrew Rybchenko .ndo_vlan_rx_add_vid = efx_vlan_rx_add_vid, 24334a53ea8aSAndrew Rybchenko .ndo_vlan_rx_kill_vid = efx_vlan_rx_kill_vid, 2434cd2d5b52SBen Hutchings #ifdef CONFIG_SFC_SRIOV 24357fa8d547SShradha Shah .ndo_set_vf_mac = efx_sriov_set_vf_mac, 24367fa8d547SShradha Shah .ndo_set_vf_vlan = efx_sriov_set_vf_vlan, 24377fa8d547SShradha Shah .ndo_set_vf_spoofchk = efx_sriov_set_vf_spoofchk, 24387fa8d547SShradha Shah .ndo_get_vf_config = efx_sriov_get_vf_config, 24394392dc69SEdward Cree .ndo_set_vf_link_state = efx_sriov_set_vf_link_state, 2440cd2d5b52SBen Hutchings #endif 244108a7b29bSBert Kenward .ndo_get_phys_port_id = efx_get_phys_port_id, 2442ac019f08SBert Kenward .ndo_get_phys_port_name = efx_get_phys_port_name, 2443874aeea5SJeff Kirsher #ifdef CONFIG_NET_POLL_CONTROLLER 2444874aeea5SJeff Kirsher .ndo_poll_controller = efx_netpoll, 2445874aeea5SJeff Kirsher #endif 2446874aeea5SJeff Kirsher .ndo_setup_tc = efx_setup_tc, 2447874aeea5SJeff Kirsher #ifdef CONFIG_RFS_ACCEL 2448874aeea5SJeff Kirsher .ndo_rx_flow_steer = efx_filter_rfs, 2449874aeea5SJeff Kirsher #endif 2450e5fbd977SJon Cooper .ndo_udp_tunnel_add = efx_udp_tunnel_add, 2451e5fbd977SJon Cooper .ndo_udp_tunnel_del = efx_udp_tunnel_del, 2452874aeea5SJeff Kirsher }; 2453874aeea5SJeff Kirsher 2454874aeea5SJeff Kirsher static void efx_update_name(struct efx_nic *efx) 2455874aeea5SJeff Kirsher { 2456874aeea5SJeff Kirsher strcpy(efx->name, efx->net_dev->name); 2457874aeea5SJeff Kirsher efx_mtd_rename(efx); 2458874aeea5SJeff Kirsher efx_set_channel_names(efx); 2459874aeea5SJeff Kirsher } 2460874aeea5SJeff Kirsher 2461874aeea5SJeff Kirsher static int efx_netdev_event(struct notifier_block *this, 2462874aeea5SJeff Kirsher unsigned long event, void *ptr) 2463874aeea5SJeff Kirsher { 2464351638e7SJiri Pirko struct net_device *net_dev = netdev_notifier_info_to_dev(ptr); 2465874aeea5SJeff Kirsher 24667fa8d547SShradha Shah if ((net_dev->netdev_ops == &efx_netdev_ops) && 2467874aeea5SJeff Kirsher event == NETDEV_CHANGENAME) 2468874aeea5SJeff Kirsher efx_update_name(netdev_priv(net_dev)); 2469874aeea5SJeff Kirsher 2470874aeea5SJeff Kirsher return NOTIFY_DONE; 2471874aeea5SJeff Kirsher } 2472874aeea5SJeff Kirsher 2473874aeea5SJeff Kirsher static struct notifier_block efx_netdev_notifier = { 2474874aeea5SJeff Kirsher .notifier_call = efx_netdev_event, 2475874aeea5SJeff Kirsher }; 2476874aeea5SJeff Kirsher 2477874aeea5SJeff Kirsher static ssize_t 2478874aeea5SJeff Kirsher show_phy_type(struct device *dev, struct device_attribute *attr, char *buf) 2479874aeea5SJeff Kirsher { 2480874aeea5SJeff Kirsher struct efx_nic *efx = pci_get_drvdata(to_pci_dev(dev)); 2481874aeea5SJeff Kirsher return sprintf(buf, "%d\n", efx->phy_type); 2482874aeea5SJeff Kirsher } 2483776fbcc9SBen Hutchings static DEVICE_ATTR(phy_type, 0444, show_phy_type, NULL); 2484874aeea5SJeff Kirsher 2485e7fef9b4SEdward Cree #ifdef CONFIG_SFC_MCDI_LOGGING 2486e7fef9b4SEdward Cree static ssize_t show_mcdi_log(struct device *dev, struct device_attribute *attr, 2487e7fef9b4SEdward Cree char *buf) 2488e7fef9b4SEdward Cree { 2489e7fef9b4SEdward Cree struct efx_nic *efx = pci_get_drvdata(to_pci_dev(dev)); 2490e7fef9b4SEdward Cree struct efx_mcdi_iface *mcdi = efx_mcdi(efx); 2491e7fef9b4SEdward Cree 2492e7fef9b4SEdward Cree return scnprintf(buf, PAGE_SIZE, "%d\n", mcdi->logging_enabled); 2493e7fef9b4SEdward Cree } 2494e7fef9b4SEdward Cree static ssize_t set_mcdi_log(struct device *dev, struct device_attribute *attr, 2495e7fef9b4SEdward Cree const char *buf, size_t count) 2496e7fef9b4SEdward Cree { 2497e7fef9b4SEdward Cree struct efx_nic *efx = pci_get_drvdata(to_pci_dev(dev)); 2498e7fef9b4SEdward Cree struct efx_mcdi_iface *mcdi = efx_mcdi(efx); 2499e7fef9b4SEdward Cree bool enable = count > 0 && *buf != '0'; 2500e7fef9b4SEdward Cree 2501e7fef9b4SEdward Cree mcdi->logging_enabled = enable; 2502e7fef9b4SEdward Cree return count; 2503e7fef9b4SEdward Cree } 2504e7fef9b4SEdward Cree static DEVICE_ATTR(mcdi_logging, 0644, show_mcdi_log, set_mcdi_log); 2505e7fef9b4SEdward Cree #endif 2506e7fef9b4SEdward Cree 2507874aeea5SJeff Kirsher static int efx_register_netdev(struct efx_nic *efx) 2508874aeea5SJeff Kirsher { 2509874aeea5SJeff Kirsher struct net_device *net_dev = efx->net_dev; 2510874aeea5SJeff Kirsher struct efx_channel *channel; 2511874aeea5SJeff Kirsher int rc; 2512874aeea5SJeff Kirsher 2513874aeea5SJeff Kirsher net_dev->watchdog_timeo = 5 * HZ; 2514874aeea5SJeff Kirsher net_dev->irq = efx->pci_dev->irq; 25157fa8d547SShradha Shah net_dev->netdev_ops = &efx_netdev_ops; 25167fa8d547SShradha Shah if (efx_nic_rev(efx) >= EFX_REV_HUNT_A0) 25178127d661SBen Hutchings net_dev->priv_flags |= IFF_UNICAST_FLT; 25187ad24ea4SWilfried Klaebe net_dev->ethtool_ops = &efx_ethtool_ops; 25197e6d06f0SBen Hutchings net_dev->gso_max_segs = EFX_TSO_MAX_SEGS; 2520cd94e519SBert Kenward net_dev->min_mtu = EFX_MIN_MTU; 2521cd94e519SBert Kenward net_dev->max_mtu = EFX_MAX_MTU; 2522874aeea5SJeff Kirsher 2523874aeea5SJeff Kirsher rtnl_lock(); 2524874aeea5SJeff Kirsher 25257153f623SBen Hutchings /* Enable resets to be scheduled and check whether any were 25267153f623SBen Hutchings * already requested. If so, the NIC is probably hosed so we 25277153f623SBen Hutchings * abort. 25287153f623SBen Hutchings */ 25297153f623SBen Hutchings efx->state = STATE_READY; 25307153f623SBen Hutchings smp_mb(); /* ensure we change state before checking reset_pending */ 25317153f623SBen Hutchings if (efx->reset_pending) { 25327153f623SBen Hutchings netif_err(efx, probe, efx->net_dev, 25337153f623SBen Hutchings "aborting probe due to scheduled reset\n"); 25347153f623SBen Hutchings rc = -EIO; 25357153f623SBen Hutchings goto fail_locked; 25367153f623SBen Hutchings } 25377153f623SBen Hutchings 2538874aeea5SJeff Kirsher rc = dev_alloc_name(net_dev, net_dev->name); 2539874aeea5SJeff Kirsher if (rc < 0) 2540874aeea5SJeff Kirsher goto fail_locked; 2541874aeea5SJeff Kirsher efx_update_name(efx); 2542874aeea5SJeff Kirsher 25438f8b3d51SBen Hutchings /* Always start with carrier off; PHY events will detect the link */ 25448f8b3d51SBen Hutchings netif_carrier_off(net_dev); 25458f8b3d51SBen Hutchings 2546874aeea5SJeff Kirsher rc = register_netdevice(net_dev); 2547874aeea5SJeff Kirsher if (rc) 2548874aeea5SJeff Kirsher goto fail_locked; 2549874aeea5SJeff Kirsher 2550874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) { 2551874aeea5SJeff Kirsher struct efx_tx_queue *tx_queue; 2552874aeea5SJeff Kirsher efx_for_each_channel_tx_queue(tx_queue, channel) 2553874aeea5SJeff Kirsher efx_init_tx_queue_core_txq(tx_queue); 2554874aeea5SJeff Kirsher } 2555874aeea5SJeff Kirsher 25560bcf4a64SBen Hutchings efx_associate(efx); 25570bcf4a64SBen Hutchings 2558874aeea5SJeff Kirsher rtnl_unlock(); 2559874aeea5SJeff Kirsher 2560874aeea5SJeff Kirsher rc = device_create_file(&efx->pci_dev->dev, &dev_attr_phy_type); 2561874aeea5SJeff Kirsher if (rc) { 2562874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, 2563874aeea5SJeff Kirsher "failed to init net dev attributes\n"); 2564874aeea5SJeff Kirsher goto fail_registered; 2565874aeea5SJeff Kirsher } 2566e7fef9b4SEdward Cree #ifdef CONFIG_SFC_MCDI_LOGGING 2567e7fef9b4SEdward Cree rc = device_create_file(&efx->pci_dev->dev, &dev_attr_mcdi_logging); 2568e7fef9b4SEdward Cree if (rc) { 2569e7fef9b4SEdward Cree netif_err(efx, drv, efx->net_dev, 2570e7fef9b4SEdward Cree "failed to init net dev attributes\n"); 2571e7fef9b4SEdward Cree goto fail_attr_mcdi_logging; 2572e7fef9b4SEdward Cree } 2573e7fef9b4SEdward Cree #endif 2574874aeea5SJeff Kirsher 2575874aeea5SJeff Kirsher return 0; 2576874aeea5SJeff Kirsher 2577e7fef9b4SEdward Cree #ifdef CONFIG_SFC_MCDI_LOGGING 2578e7fef9b4SEdward Cree fail_attr_mcdi_logging: 2579e7fef9b4SEdward Cree device_remove_file(&efx->pci_dev->dev, &dev_attr_phy_type); 2580e7fef9b4SEdward Cree #endif 25817153f623SBen Hutchings fail_registered: 25827153f623SBen Hutchings rtnl_lock(); 25830bcf4a64SBen Hutchings efx_dissociate(efx); 25847153f623SBen Hutchings unregister_netdevice(net_dev); 2585874aeea5SJeff Kirsher fail_locked: 25867153f623SBen Hutchings efx->state = STATE_UNINIT; 2587874aeea5SJeff Kirsher rtnl_unlock(); 2588874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, "could not register net dev\n"); 2589874aeea5SJeff Kirsher return rc; 2590874aeea5SJeff Kirsher } 2591874aeea5SJeff Kirsher 2592874aeea5SJeff Kirsher static void efx_unregister_netdev(struct efx_nic *efx) 2593874aeea5SJeff Kirsher { 2594874aeea5SJeff Kirsher if (!efx->net_dev) 2595874aeea5SJeff Kirsher return; 2596874aeea5SJeff Kirsher 2597874aeea5SJeff Kirsher BUG_ON(netdev_priv(efx->net_dev) != efx); 2598874aeea5SJeff Kirsher 2599e7fef9b4SEdward Cree if (efx_dev_registered(efx)) { 2600874aeea5SJeff Kirsher strlcpy(efx->name, pci_name(efx->pci_dev), sizeof(efx->name)); 2601e7fef9b4SEdward Cree #ifdef CONFIG_SFC_MCDI_LOGGING 2602e7fef9b4SEdward Cree device_remove_file(&efx->pci_dev->dev, &dev_attr_mcdi_logging); 2603e7fef9b4SEdward Cree #endif 2604874aeea5SJeff Kirsher device_remove_file(&efx->pci_dev->dev, &dev_attr_phy_type); 2605e7fef9b4SEdward Cree unregister_netdev(efx->net_dev); 2606e7fef9b4SEdward Cree } 2607874aeea5SJeff Kirsher } 2608874aeea5SJeff Kirsher 2609874aeea5SJeff Kirsher /************************************************************************** 2610874aeea5SJeff Kirsher * 2611874aeea5SJeff Kirsher * Device reset and suspend 2612874aeea5SJeff Kirsher * 2613874aeea5SJeff Kirsher **************************************************************************/ 2614874aeea5SJeff Kirsher 2615874aeea5SJeff Kirsher /* Tears down the entire software state and most of the hardware state 2616874aeea5SJeff Kirsher * before reset. */ 2617874aeea5SJeff Kirsher void efx_reset_down(struct efx_nic *efx, enum reset_type method) 2618874aeea5SJeff Kirsher { 2619874aeea5SJeff Kirsher EFX_ASSERT_RESET_SERIALISED(efx); 2620874aeea5SJeff Kirsher 2621e283546cSEdward Cree if (method == RESET_TYPE_MCDI_TIMEOUT) 2622e283546cSEdward Cree efx->type->prepare_flr(efx); 2623e283546cSEdward Cree 2624874aeea5SJeff Kirsher efx_stop_all(efx); 2625d8291187SBen Hutchings efx_disable_interrupts(efx); 26265642ceefSBen Hutchings 26275642ceefSBen Hutchings mutex_lock(&efx->mac_lock); 2628087e9025SJon Cooper if (efx->port_initialized && method != RESET_TYPE_INVISIBLE && 2629087e9025SJon Cooper method != RESET_TYPE_DATAPATH) 2630874aeea5SJeff Kirsher efx->phy_op->fini(efx); 2631874aeea5SJeff Kirsher efx->type->fini(efx); 2632874aeea5SJeff Kirsher } 2633874aeea5SJeff Kirsher 2634874aeea5SJeff Kirsher /* This function will always ensure that the locks acquired in 2635874aeea5SJeff Kirsher * efx_reset_down() are released. A failure return code indicates 2636874aeea5SJeff Kirsher * that we were unable to reinitialise the hardware, and the 2637874aeea5SJeff Kirsher * driver should be disabled. If ok is false, then the rx and tx 2638874aeea5SJeff Kirsher * engines are not restarted, pending a RESET_DISABLE. */ 2639874aeea5SJeff Kirsher int efx_reset_up(struct efx_nic *efx, enum reset_type method, bool ok) 2640874aeea5SJeff Kirsher { 2641874aeea5SJeff Kirsher int rc; 2642874aeea5SJeff Kirsher 2643874aeea5SJeff Kirsher EFX_ASSERT_RESET_SERIALISED(efx); 2644874aeea5SJeff Kirsher 2645e283546cSEdward Cree if (method == RESET_TYPE_MCDI_TIMEOUT) 2646e283546cSEdward Cree efx->type->finish_flr(efx); 2647e283546cSEdward Cree 2648e283546cSEdward Cree /* Ensure that SRAM is initialised even if we're disabling the device */ 2649874aeea5SJeff Kirsher rc = efx->type->init(efx); 2650874aeea5SJeff Kirsher if (rc) { 2651874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, "failed to initialise NIC\n"); 2652874aeea5SJeff Kirsher goto fail; 2653874aeea5SJeff Kirsher } 2654874aeea5SJeff Kirsher 2655874aeea5SJeff Kirsher if (!ok) 2656874aeea5SJeff Kirsher goto fail; 2657874aeea5SJeff Kirsher 2658087e9025SJon Cooper if (efx->port_initialized && method != RESET_TYPE_INVISIBLE && 2659087e9025SJon Cooper method != RESET_TYPE_DATAPATH) { 2660874aeea5SJeff Kirsher rc = efx->phy_op->init(efx); 2661874aeea5SJeff Kirsher if (rc) 2662874aeea5SJeff Kirsher goto fail; 2663267d9d73SEdward Cree rc = efx->phy_op->reconfigure(efx); 2664267d9d73SEdward Cree if (rc && rc != -EPERM) 2665874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, 2666874aeea5SJeff Kirsher "could not restore PHY settings\n"); 2667874aeea5SJeff Kirsher } 2668874aeea5SJeff Kirsher 2669261e4d96SJon Cooper rc = efx_enable_interrupts(efx); 2670261e4d96SJon Cooper if (rc) 2671261e4d96SJon Cooper goto fail; 26726d8aaaf6SDaniel Pieczko 26736d8aaaf6SDaniel Pieczko #ifdef CONFIG_SFC_SRIOV 26746d8aaaf6SDaniel Pieczko rc = efx->type->vswitching_restore(efx); 26756d8aaaf6SDaniel Pieczko if (rc) /* not fatal; the PF will still work fine */ 26766d8aaaf6SDaniel Pieczko netif_warn(efx, probe, efx->net_dev, 26776d8aaaf6SDaniel Pieczko "failed to restore vswitching rc=%d;" 26786d8aaaf6SDaniel Pieczko " VFs may not function\n", rc); 26796d8aaaf6SDaniel Pieczko #endif 26806d8aaaf6SDaniel Pieczko 26810d322413SEdward Cree down_read(&efx->filter_sem); 2682874aeea5SJeff Kirsher efx_restore_filters(efx); 26830d322413SEdward Cree up_read(&efx->filter_sem); 26847fa8d547SShradha Shah if (efx->type->sriov_reset) 2685d98a4ffeSShradha Shah efx->type->sriov_reset(efx); 2686874aeea5SJeff Kirsher 2687874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 2688874aeea5SJeff Kirsher 2689874aeea5SJeff Kirsher efx_start_all(efx); 2690874aeea5SJeff Kirsher 2691e5fbd977SJon Cooper if (efx->type->udp_tnl_push_ports) 2692e5fbd977SJon Cooper efx->type->udp_tnl_push_ports(efx); 2693e5fbd977SJon Cooper 2694874aeea5SJeff Kirsher return 0; 2695874aeea5SJeff Kirsher 2696874aeea5SJeff Kirsher fail: 2697874aeea5SJeff Kirsher efx->port_initialized = false; 2698874aeea5SJeff Kirsher 2699874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 2700874aeea5SJeff Kirsher 2701874aeea5SJeff Kirsher return rc; 2702874aeea5SJeff Kirsher } 2703874aeea5SJeff Kirsher 2704874aeea5SJeff Kirsher /* Reset the NIC using the specified method. Note that the reset may 2705874aeea5SJeff Kirsher * fail, in which case the card will be left in an unusable state. 2706874aeea5SJeff Kirsher * 2707874aeea5SJeff Kirsher * Caller must hold the rtnl_lock. 2708874aeea5SJeff Kirsher */ 2709874aeea5SJeff Kirsher int efx_reset(struct efx_nic *efx, enum reset_type method) 2710874aeea5SJeff Kirsher { 2711874aeea5SJeff Kirsher int rc, rc2; 2712874aeea5SJeff Kirsher bool disabled; 2713874aeea5SJeff Kirsher 2714874aeea5SJeff Kirsher netif_info(efx, drv, efx->net_dev, "resetting (%s)\n", 2715874aeea5SJeff Kirsher RESET_TYPE(method)); 2716874aeea5SJeff Kirsher 2717c2f3b8e3SDaniel Pieczko efx_device_detach_sync(efx); 2718874aeea5SJeff Kirsher efx_reset_down(efx, method); 2719874aeea5SJeff Kirsher 2720874aeea5SJeff Kirsher rc = efx->type->reset(efx, method); 2721874aeea5SJeff Kirsher if (rc) { 2722874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, "failed to reset hardware\n"); 2723874aeea5SJeff Kirsher goto out; 2724874aeea5SJeff Kirsher } 2725874aeea5SJeff Kirsher 2726874aeea5SJeff Kirsher /* Clear flags for the scopes we covered. We assume the NIC and 2727874aeea5SJeff Kirsher * driver are now quiescent so that there is no race here. 2728874aeea5SJeff Kirsher */ 2729e283546cSEdward Cree if (method < RESET_TYPE_MAX_METHOD) 2730874aeea5SJeff Kirsher efx->reset_pending &= -(1 << (method + 1)); 2731e283546cSEdward Cree else /* it doesn't fit into the well-ordered scope hierarchy */ 2732e283546cSEdward Cree __clear_bit(method, &efx->reset_pending); 2733874aeea5SJeff Kirsher 2734874aeea5SJeff Kirsher /* Reinitialise bus-mastering, which may have been turned off before 2735874aeea5SJeff Kirsher * the reset was scheduled. This is still appropriate, even in the 2736874aeea5SJeff Kirsher * RESET_TYPE_DISABLE since this driver generally assumes the hardware 2737874aeea5SJeff Kirsher * can respond to requests. */ 2738874aeea5SJeff Kirsher pci_set_master(efx->pci_dev); 2739874aeea5SJeff Kirsher 2740874aeea5SJeff Kirsher out: 2741874aeea5SJeff Kirsher /* Leave device stopped if necessary */ 2742626950dbSAlexandre Rames disabled = rc || 2743626950dbSAlexandre Rames method == RESET_TYPE_DISABLE || 2744626950dbSAlexandre Rames method == RESET_TYPE_RECOVER_OR_DISABLE; 2745874aeea5SJeff Kirsher rc2 = efx_reset_up(efx, method, !disabled); 2746874aeea5SJeff Kirsher if (rc2) { 2747874aeea5SJeff Kirsher disabled = true; 2748874aeea5SJeff Kirsher if (!rc) 2749874aeea5SJeff Kirsher rc = rc2; 2750874aeea5SJeff Kirsher } 2751874aeea5SJeff Kirsher 2752874aeea5SJeff Kirsher if (disabled) { 2753874aeea5SJeff Kirsher dev_close(efx->net_dev); 2754874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, "has been disabled\n"); 2755874aeea5SJeff Kirsher efx->state = STATE_DISABLED; 2756874aeea5SJeff Kirsher } else { 2757874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "reset complete\n"); 27589c568fd8SPeter Dunning efx_device_attach_if_not_resetting(efx); 2759874aeea5SJeff Kirsher } 2760874aeea5SJeff Kirsher return rc; 2761874aeea5SJeff Kirsher } 2762874aeea5SJeff Kirsher 2763626950dbSAlexandre Rames /* Try recovery mechanisms. 2764626950dbSAlexandre Rames * For now only EEH is supported. 2765626950dbSAlexandre Rames * Returns 0 if the recovery mechanisms are unsuccessful. 2766626950dbSAlexandre Rames * Returns a non-zero value otherwise. 2767626950dbSAlexandre Rames */ 2768b28405b0SAlexandre Rames int efx_try_recovery(struct efx_nic *efx) 2769626950dbSAlexandre Rames { 2770626950dbSAlexandre Rames #ifdef CONFIG_EEH 2771626950dbSAlexandre Rames /* A PCI error can occur and not be seen by EEH because nothing 2772626950dbSAlexandre Rames * happens on the PCI bus. In this case the driver may fail and 2773626950dbSAlexandre Rames * schedule a 'recover or reset', leading to this recovery handler. 2774626950dbSAlexandre Rames * Manually call the eeh failure check function. 2775626950dbSAlexandre Rames */ 277612a89dbaSBenjamin Herrenschmidt struct eeh_dev *eehdev = pci_dev_to_eeh_dev(efx->pci_dev); 2777626950dbSAlexandre Rames if (eeh_dev_check_failure(eehdev)) { 2778626950dbSAlexandre Rames /* The EEH mechanisms will handle the error and reset the 2779626950dbSAlexandre Rames * device if necessary. 2780626950dbSAlexandre Rames */ 2781626950dbSAlexandre Rames return 1; 2782626950dbSAlexandre Rames } 2783626950dbSAlexandre Rames #endif 2784626950dbSAlexandre Rames return 0; 2785626950dbSAlexandre Rames } 2786626950dbSAlexandre Rames 278774cd60a4SJon Cooper static void efx_wait_for_bist_end(struct efx_nic *efx) 278874cd60a4SJon Cooper { 278974cd60a4SJon Cooper int i; 279074cd60a4SJon Cooper 279174cd60a4SJon Cooper for (i = 0; i < BIST_WAIT_DELAY_COUNT; ++i) { 279274cd60a4SJon Cooper if (efx_mcdi_poll_reboot(efx)) 279374cd60a4SJon Cooper goto out; 279474cd60a4SJon Cooper msleep(BIST_WAIT_DELAY_MS); 279574cd60a4SJon Cooper } 279674cd60a4SJon Cooper 279774cd60a4SJon Cooper netif_err(efx, drv, efx->net_dev, "Warning: No MC reboot after BIST mode\n"); 279874cd60a4SJon Cooper out: 279974cd60a4SJon Cooper /* Either way unset the BIST flag. If we found no reboot we probably 280074cd60a4SJon Cooper * won't recover, but we should try. 280174cd60a4SJon Cooper */ 280274cd60a4SJon Cooper efx->mc_bist_for_other_fn = false; 280374cd60a4SJon Cooper } 280474cd60a4SJon Cooper 2805874aeea5SJeff Kirsher /* The worker thread exists so that code that cannot sleep can 2806874aeea5SJeff Kirsher * schedule a reset for later. 2807874aeea5SJeff Kirsher */ 2808874aeea5SJeff Kirsher static void efx_reset_work(struct work_struct *data) 2809874aeea5SJeff Kirsher { 2810874aeea5SJeff Kirsher struct efx_nic *efx = container_of(data, struct efx_nic, reset_work); 2811626950dbSAlexandre Rames unsigned long pending; 2812626950dbSAlexandre Rames enum reset_type method; 2813626950dbSAlexandre Rames 28146aa7de05SMark Rutland pending = READ_ONCE(efx->reset_pending); 2815626950dbSAlexandre Rames method = fls(pending) - 1; 2816626950dbSAlexandre Rames 281774cd60a4SJon Cooper if (method == RESET_TYPE_MC_BIST) 281874cd60a4SJon Cooper efx_wait_for_bist_end(efx); 281974cd60a4SJon Cooper 2820626950dbSAlexandre Rames if ((method == RESET_TYPE_RECOVER_OR_DISABLE || 2821626950dbSAlexandre Rames method == RESET_TYPE_RECOVER_OR_ALL) && 2822626950dbSAlexandre Rames efx_try_recovery(efx)) 2823626950dbSAlexandre Rames return; 2824874aeea5SJeff Kirsher 2825874aeea5SJeff Kirsher if (!pending) 2826874aeea5SJeff Kirsher return; 2827874aeea5SJeff Kirsher 2828874aeea5SJeff Kirsher rtnl_lock(); 28297153f623SBen Hutchings 28307153f623SBen Hutchings /* We checked the state in efx_schedule_reset() but it may 28317153f623SBen Hutchings * have changed by now. Now that we have the RTNL lock, 28327153f623SBen Hutchings * it cannot change again. 28337153f623SBen Hutchings */ 28347153f623SBen Hutchings if (efx->state == STATE_READY) 2835626950dbSAlexandre Rames (void)efx_reset(efx, method); 28367153f623SBen Hutchings 2837874aeea5SJeff Kirsher rtnl_unlock(); 2838874aeea5SJeff Kirsher } 2839874aeea5SJeff Kirsher 2840874aeea5SJeff Kirsher void efx_schedule_reset(struct efx_nic *efx, enum reset_type type) 2841874aeea5SJeff Kirsher { 2842874aeea5SJeff Kirsher enum reset_type method; 2843874aeea5SJeff Kirsher 2844626950dbSAlexandre Rames if (efx->state == STATE_RECOVERY) { 2845626950dbSAlexandre Rames netif_dbg(efx, drv, efx->net_dev, 2846626950dbSAlexandre Rames "recovering: skip scheduling %s reset\n", 2847626950dbSAlexandre Rames RESET_TYPE(type)); 2848626950dbSAlexandre Rames return; 2849626950dbSAlexandre Rames } 2850626950dbSAlexandre Rames 2851874aeea5SJeff Kirsher switch (type) { 2852874aeea5SJeff Kirsher case RESET_TYPE_INVISIBLE: 2853874aeea5SJeff Kirsher case RESET_TYPE_ALL: 2854626950dbSAlexandre Rames case RESET_TYPE_RECOVER_OR_ALL: 2855874aeea5SJeff Kirsher case RESET_TYPE_WORLD: 2856874aeea5SJeff Kirsher case RESET_TYPE_DISABLE: 2857626950dbSAlexandre Rames case RESET_TYPE_RECOVER_OR_DISABLE: 2858087e9025SJon Cooper case RESET_TYPE_DATAPATH: 285974cd60a4SJon Cooper case RESET_TYPE_MC_BIST: 2860e283546cSEdward Cree case RESET_TYPE_MCDI_TIMEOUT: 2861874aeea5SJeff Kirsher method = type; 2862874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "scheduling %s reset\n", 2863874aeea5SJeff Kirsher RESET_TYPE(method)); 2864874aeea5SJeff Kirsher break; 2865874aeea5SJeff Kirsher default: 2866874aeea5SJeff Kirsher method = efx->type->map_reset_reason(type); 2867874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, 2868874aeea5SJeff Kirsher "scheduling %s reset for %s\n", 2869874aeea5SJeff Kirsher RESET_TYPE(method), RESET_TYPE(type)); 2870874aeea5SJeff Kirsher break; 2871874aeea5SJeff Kirsher } 2872874aeea5SJeff Kirsher 2873874aeea5SJeff Kirsher set_bit(method, &efx->reset_pending); 28747153f623SBen Hutchings smp_mb(); /* ensure we change reset_pending before checking state */ 28757153f623SBen Hutchings 28767153f623SBen Hutchings /* If we're not READY then just leave the flags set as the cue 28777153f623SBen Hutchings * to abort probing or reschedule the reset later. 28787153f623SBen Hutchings */ 28796aa7de05SMark Rutland if (READ_ONCE(efx->state) != STATE_READY) 28807153f623SBen Hutchings return; 2881874aeea5SJeff Kirsher 2882874aeea5SJeff Kirsher /* efx_process_channel() will no longer read events once a 2883874aeea5SJeff Kirsher * reset is scheduled. So switch back to poll'd MCDI completions. */ 2884874aeea5SJeff Kirsher efx_mcdi_mode_poll(efx); 2885874aeea5SJeff Kirsher 2886874aeea5SJeff Kirsher queue_work(reset_workqueue, &efx->reset_work); 2887874aeea5SJeff Kirsher } 2888874aeea5SJeff Kirsher 2889874aeea5SJeff Kirsher /************************************************************************** 2890874aeea5SJeff Kirsher * 2891874aeea5SJeff Kirsher * List of NICs we support 2892874aeea5SJeff Kirsher * 2893874aeea5SJeff Kirsher **************************************************************************/ 2894874aeea5SJeff Kirsher 2895874aeea5SJeff Kirsher /* PCI device ID table */ 28969baa3c34SBenoit Taine static const struct pci_device_id efx_pci_table[] = { 2897547c474fSBen Hutchings {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0803), /* SFC9020 */ 2898874aeea5SJeff Kirsher .driver_data = (unsigned long) &siena_a0_nic_type}, 2899547c474fSBen Hutchings {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0813), /* SFL9021 */ 2900874aeea5SJeff Kirsher .driver_data = (unsigned long) &siena_a0_nic_type}, 29018127d661SBen Hutchings {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0903), /* SFC9120 PF */ 29028127d661SBen Hutchings .driver_data = (unsigned long) &efx_hunt_a0_nic_type}, 29036f7f8aa6SShradha Shah {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x1903), /* SFC9120 VF */ 29046f7f8aa6SShradha Shah .driver_data = (unsigned long) &efx_hunt_a0_vf_nic_type}, 29053b06a00eSMateusz Wrzesinski {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0923), /* SFC9140 PF */ 29063b06a00eSMateusz Wrzesinski .driver_data = (unsigned long) &efx_hunt_a0_nic_type}, 2907dd248f1bSBert Kenward {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x1923), /* SFC9140 VF */ 2908dd248f1bSBert Kenward .driver_data = (unsigned long) &efx_hunt_a0_vf_nic_type}, 2909dd248f1bSBert Kenward {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0a03), /* SFC9220 PF */ 2910dd248f1bSBert Kenward .driver_data = (unsigned long) &efx_hunt_a0_nic_type}, 2911dd248f1bSBert Kenward {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x1a03), /* SFC9220 VF */ 2912dd248f1bSBert Kenward .driver_data = (unsigned long) &efx_hunt_a0_vf_nic_type}, 2913874aeea5SJeff Kirsher {0} /* end of list */ 2914874aeea5SJeff Kirsher }; 2915874aeea5SJeff Kirsher 2916874aeea5SJeff Kirsher /************************************************************************** 2917874aeea5SJeff Kirsher * 2918874aeea5SJeff Kirsher * Dummy PHY/MAC operations 2919874aeea5SJeff Kirsher * 2920874aeea5SJeff Kirsher * Can be used for some unimplemented operations 2921874aeea5SJeff Kirsher * Needed so all function pointers are valid and do not have to be tested 2922874aeea5SJeff Kirsher * before use 2923874aeea5SJeff Kirsher * 2924874aeea5SJeff Kirsher **************************************************************************/ 2925874aeea5SJeff Kirsher int efx_port_dummy_op_int(struct efx_nic *efx) 2926874aeea5SJeff Kirsher { 2927874aeea5SJeff Kirsher return 0; 2928874aeea5SJeff Kirsher } 2929874aeea5SJeff Kirsher void efx_port_dummy_op_void(struct efx_nic *efx) {} 2930874aeea5SJeff Kirsher 2931874aeea5SJeff Kirsher static bool efx_port_dummy_op_poll(struct efx_nic *efx) 2932874aeea5SJeff Kirsher { 2933874aeea5SJeff Kirsher return false; 2934874aeea5SJeff Kirsher } 2935874aeea5SJeff Kirsher 2936874aeea5SJeff Kirsher static const struct efx_phy_operations efx_dummy_phy_operations = { 2937874aeea5SJeff Kirsher .init = efx_port_dummy_op_int, 2938874aeea5SJeff Kirsher .reconfigure = efx_port_dummy_op_int, 2939874aeea5SJeff Kirsher .poll = efx_port_dummy_op_poll, 2940874aeea5SJeff Kirsher .fini = efx_port_dummy_op_void, 2941874aeea5SJeff Kirsher }; 2942874aeea5SJeff Kirsher 2943874aeea5SJeff Kirsher /************************************************************************** 2944874aeea5SJeff Kirsher * 2945874aeea5SJeff Kirsher * Data housekeeping 2946874aeea5SJeff Kirsher * 2947874aeea5SJeff Kirsher **************************************************************************/ 2948874aeea5SJeff Kirsher 2949874aeea5SJeff Kirsher /* This zeroes out and then fills in the invariants in a struct 2950874aeea5SJeff Kirsher * efx_nic (including all sub-structures). 2951874aeea5SJeff Kirsher */ 2952adeb15aaSBen Hutchings static int efx_init_struct(struct efx_nic *efx, 2953874aeea5SJeff Kirsher struct pci_dev *pci_dev, struct net_device *net_dev) 2954874aeea5SJeff Kirsher { 29556f9f6ec2SAndrew Rybchenko int rc = -ENOMEM, i; 2956874aeea5SJeff Kirsher 2957874aeea5SJeff Kirsher /* Initialise common structures */ 29580bcf4a64SBen Hutchings INIT_LIST_HEAD(&efx->node); 29590bcf4a64SBen Hutchings INIT_LIST_HEAD(&efx->secondary_list); 2960874aeea5SJeff Kirsher spin_lock_init(&efx->biu_lock); 2961874aeea5SJeff Kirsher #ifdef CONFIG_SFC_MTD 2962874aeea5SJeff Kirsher INIT_LIST_HEAD(&efx->mtd_list); 2963874aeea5SJeff Kirsher #endif 2964874aeea5SJeff Kirsher INIT_WORK(&efx->reset_work, efx_reset_work); 2965874aeea5SJeff Kirsher INIT_DELAYED_WORK(&efx->monitor_work, efx_monitor); 2966dd40781eSBen Hutchings INIT_DELAYED_WORK(&efx->selftest_work, efx_selftest_async_work); 2967874aeea5SJeff Kirsher efx->pci_dev = pci_dev; 2968874aeea5SJeff Kirsher efx->msg_enable = debug; 2969f16aeea0SBen Hutchings efx->state = STATE_UNINIT; 2970874aeea5SJeff Kirsher strlcpy(efx->name, pci_name(pci_dev), sizeof(efx->name)); 2971874aeea5SJeff Kirsher 2972874aeea5SJeff Kirsher efx->net_dev = net_dev; 297343a3739dSJon Cooper efx->rx_prefix_size = efx->type->rx_prefix_size; 29742ec03014SAndrew Rybchenko efx->rx_ip_align = 29752ec03014SAndrew Rybchenko NET_IP_ALIGN ? (efx->rx_prefix_size + NET_IP_ALIGN) % 4 : 0; 297643a3739dSJon Cooper efx->rx_packet_hash_offset = 297743a3739dSJon Cooper efx->type->rx_hash_offset - efx->type->rx_prefix_size; 2978bd9a265dSJon Cooper efx->rx_packet_ts_offset = 2979bd9a265dSJon Cooper efx->type->rx_ts_offset - efx->type->rx_prefix_size; 2980874aeea5SJeff Kirsher spin_lock_init(&efx->stats_lock); 298171827443SEdward Cree efx->vi_stride = EFX_DEFAULT_VI_STRIDE; 2982874aeea5SJeff Kirsher mutex_init(&efx->mac_lock); 2983874aeea5SJeff Kirsher efx->phy_op = &efx_dummy_phy_operations; 2984874aeea5SJeff Kirsher efx->mdio.dev = net_dev; 2985874aeea5SJeff Kirsher INIT_WORK(&efx->mac_work, efx_mac_work); 29869f2cb71cSBen Hutchings init_waitqueue_head(&efx->flush_wq); 2987874aeea5SJeff Kirsher 2988874aeea5SJeff Kirsher for (i = 0; i < EFX_MAX_CHANNELS; i++) { 2989874aeea5SJeff Kirsher efx->channel[i] = efx_alloc_channel(efx, i, NULL); 2990874aeea5SJeff Kirsher if (!efx->channel[i]) 2991874aeea5SJeff Kirsher goto fail; 2992d8291187SBen Hutchings efx->msi_context[i].efx = efx; 2993d8291187SBen Hutchings efx->msi_context[i].index = i; 2994874aeea5SJeff Kirsher } 2995874aeea5SJeff Kirsher 2996874aeea5SJeff Kirsher /* Higher numbered interrupt modes are less capable! */ 29976f9f6ec2SAndrew Rybchenko if (WARN_ON_ONCE(efx->type->max_interrupt_mode > 29986f9f6ec2SAndrew Rybchenko efx->type->min_interrupt_mode)) { 29996f9f6ec2SAndrew Rybchenko rc = -EIO; 30006f9f6ec2SAndrew Rybchenko goto fail; 30016f9f6ec2SAndrew Rybchenko } 3002874aeea5SJeff Kirsher efx->interrupt_mode = max(efx->type->max_interrupt_mode, 3003874aeea5SJeff Kirsher interrupt_mode); 30046f9f6ec2SAndrew Rybchenko efx->interrupt_mode = min(efx->type->min_interrupt_mode, 30056f9f6ec2SAndrew Rybchenko interrupt_mode); 3006874aeea5SJeff Kirsher 3007874aeea5SJeff Kirsher /* Would be good to use the net_dev name, but we're too early */ 3008874aeea5SJeff Kirsher snprintf(efx->workqueue_name, sizeof(efx->workqueue_name), "sfc%s", 3009874aeea5SJeff Kirsher pci_name(pci_dev)); 3010874aeea5SJeff Kirsher efx->workqueue = create_singlethread_workqueue(efx->workqueue_name); 3011874aeea5SJeff Kirsher if (!efx->workqueue) 3012874aeea5SJeff Kirsher goto fail; 3013874aeea5SJeff Kirsher 3014874aeea5SJeff Kirsher return 0; 3015874aeea5SJeff Kirsher 3016874aeea5SJeff Kirsher fail: 3017874aeea5SJeff Kirsher efx_fini_struct(efx); 30186f9f6ec2SAndrew Rybchenko return rc; 3019874aeea5SJeff Kirsher } 3020874aeea5SJeff Kirsher 3021874aeea5SJeff Kirsher static void efx_fini_struct(struct efx_nic *efx) 3022874aeea5SJeff Kirsher { 3023874aeea5SJeff Kirsher int i; 3024874aeea5SJeff Kirsher 3025874aeea5SJeff Kirsher for (i = 0; i < EFX_MAX_CHANNELS; i++) 3026874aeea5SJeff Kirsher kfree(efx->channel[i]); 3027874aeea5SJeff Kirsher 3028ef215e64SBen Hutchings kfree(efx->vpd_sn); 3029ef215e64SBen Hutchings 3030874aeea5SJeff Kirsher if (efx->workqueue) { 3031874aeea5SJeff Kirsher destroy_workqueue(efx->workqueue); 3032874aeea5SJeff Kirsher efx->workqueue = NULL; 3033874aeea5SJeff Kirsher } 3034874aeea5SJeff Kirsher } 3035874aeea5SJeff Kirsher 3036e4d112e4SEdward Cree void efx_update_sw_stats(struct efx_nic *efx, u64 *stats) 3037e4d112e4SEdward Cree { 3038e4d112e4SEdward Cree u64 n_rx_nodesc_trunc = 0; 3039e4d112e4SEdward Cree struct efx_channel *channel; 3040e4d112e4SEdward Cree 3041e4d112e4SEdward Cree efx_for_each_channel(channel, efx) 3042e4d112e4SEdward Cree n_rx_nodesc_trunc += channel->n_rx_nodesc_trunc; 3043e4d112e4SEdward Cree stats[GENERIC_STAT_rx_nodesc_trunc] = n_rx_nodesc_trunc; 3044e4d112e4SEdward Cree stats[GENERIC_STAT_rx_noskb_drops] = atomic_read(&efx->n_rx_noskb_drops); 3045e4d112e4SEdward Cree } 3046e4d112e4SEdward Cree 3047874aeea5SJeff Kirsher /************************************************************************** 3048874aeea5SJeff Kirsher * 3049874aeea5SJeff Kirsher * PCI interface 3050874aeea5SJeff Kirsher * 3051874aeea5SJeff Kirsher **************************************************************************/ 3052874aeea5SJeff Kirsher 3053874aeea5SJeff Kirsher /* Main body of final NIC shutdown code 3054874aeea5SJeff Kirsher * This is called only at module unload (or hotplug removal). 3055874aeea5SJeff Kirsher */ 3056874aeea5SJeff Kirsher static void efx_pci_remove_main(struct efx_nic *efx) 3057874aeea5SJeff Kirsher { 30587153f623SBen Hutchings /* Flush reset_work. It can no longer be scheduled since we 30597153f623SBen Hutchings * are not READY. 30607153f623SBen Hutchings */ 30617153f623SBen Hutchings BUG_ON(efx->state == STATE_READY); 30627153f623SBen Hutchings cancel_work_sync(&efx->reset_work); 30637153f623SBen Hutchings 3064d8291187SBen Hutchings efx_disable_interrupts(efx); 3065874aeea5SJeff Kirsher efx_nic_fini_interrupt(efx); 3066874aeea5SJeff Kirsher efx_fini_port(efx); 3067874aeea5SJeff Kirsher efx->type->fini(efx); 3068874aeea5SJeff Kirsher efx_fini_napi(efx); 3069874aeea5SJeff Kirsher efx_remove_all(efx); 3070874aeea5SJeff Kirsher } 3071874aeea5SJeff Kirsher 3072874aeea5SJeff Kirsher /* Final NIC shutdown 30732a3fc311SDaniel Pieczko * This is called only at module unload (or hotplug removal). A PF can call 30742a3fc311SDaniel Pieczko * this on its VFs to ensure they are unbound first. 3075874aeea5SJeff Kirsher */ 3076874aeea5SJeff Kirsher static void efx_pci_remove(struct pci_dev *pci_dev) 3077874aeea5SJeff Kirsher { 3078874aeea5SJeff Kirsher struct efx_nic *efx; 3079874aeea5SJeff Kirsher 3080874aeea5SJeff Kirsher efx = pci_get_drvdata(pci_dev); 3081874aeea5SJeff Kirsher if (!efx) 3082874aeea5SJeff Kirsher return; 3083874aeea5SJeff Kirsher 3084874aeea5SJeff Kirsher /* Mark the NIC as fini, then stop the interface */ 3085874aeea5SJeff Kirsher rtnl_lock(); 30860bcf4a64SBen Hutchings efx_dissociate(efx); 3087874aeea5SJeff Kirsher dev_close(efx->net_dev); 3088d8291187SBen Hutchings efx_disable_interrupts(efx); 3089ea6bb99eSEdward Cree efx->state = STATE_UNINIT; 3090874aeea5SJeff Kirsher rtnl_unlock(); 3091874aeea5SJeff Kirsher 30927fa8d547SShradha Shah if (efx->type->sriov_fini) 3093d98a4ffeSShradha Shah efx->type->sriov_fini(efx); 30947fa8d547SShradha Shah 3095874aeea5SJeff Kirsher efx_unregister_netdev(efx); 3096874aeea5SJeff Kirsher 3097874aeea5SJeff Kirsher efx_mtd_remove(efx); 3098874aeea5SJeff Kirsher 3099874aeea5SJeff Kirsher efx_pci_remove_main(efx); 3100874aeea5SJeff Kirsher 3101874aeea5SJeff Kirsher efx_fini_io(efx); 3102874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "shutdown successful\n"); 3103874aeea5SJeff Kirsher 3104874aeea5SJeff Kirsher efx_fini_struct(efx); 3105874aeea5SJeff Kirsher free_netdev(efx->net_dev); 3106626950dbSAlexandre Rames 3107626950dbSAlexandre Rames pci_disable_pcie_error_reporting(pci_dev); 3108874aeea5SJeff Kirsher }; 3109874aeea5SJeff Kirsher 3110460eeaa0SBen Hutchings /* NIC VPD information 3111460eeaa0SBen Hutchings * Called during probe to display the part number of the 3112460eeaa0SBen Hutchings * installed NIC. VPD is potentially very large but this should 3113460eeaa0SBen Hutchings * always appear within the first 512 bytes. 3114460eeaa0SBen Hutchings */ 3115460eeaa0SBen Hutchings #define SFC_VPD_LEN 512 3116ef215e64SBen Hutchings static void efx_probe_vpd_strings(struct efx_nic *efx) 3117460eeaa0SBen Hutchings { 3118460eeaa0SBen Hutchings struct pci_dev *dev = efx->pci_dev; 3119460eeaa0SBen Hutchings char vpd_data[SFC_VPD_LEN]; 3120460eeaa0SBen Hutchings ssize_t vpd_size; 3121ef215e64SBen Hutchings int ro_start, ro_size, i, j; 3122460eeaa0SBen Hutchings 3123460eeaa0SBen Hutchings /* Get the vpd data from the device */ 3124460eeaa0SBen Hutchings vpd_size = pci_read_vpd(dev, 0, sizeof(vpd_data), vpd_data); 3125460eeaa0SBen Hutchings if (vpd_size <= 0) { 3126460eeaa0SBen Hutchings netif_err(efx, drv, efx->net_dev, "Unable to read VPD\n"); 3127460eeaa0SBen Hutchings return; 3128460eeaa0SBen Hutchings } 3129460eeaa0SBen Hutchings 3130460eeaa0SBen Hutchings /* Get the Read only section */ 3131ef215e64SBen Hutchings ro_start = pci_vpd_find_tag(vpd_data, 0, vpd_size, PCI_VPD_LRDT_RO_DATA); 3132ef215e64SBen Hutchings if (ro_start < 0) { 3133460eeaa0SBen Hutchings netif_err(efx, drv, efx->net_dev, "VPD Read-only not found\n"); 3134460eeaa0SBen Hutchings return; 3135460eeaa0SBen Hutchings } 3136460eeaa0SBen Hutchings 3137ef215e64SBen Hutchings ro_size = pci_vpd_lrdt_size(&vpd_data[ro_start]); 3138ef215e64SBen Hutchings j = ro_size; 3139ef215e64SBen Hutchings i = ro_start + PCI_VPD_LRDT_TAG_SIZE; 3140460eeaa0SBen Hutchings if (i + j > vpd_size) 3141460eeaa0SBen Hutchings j = vpd_size - i; 3142460eeaa0SBen Hutchings 3143460eeaa0SBen Hutchings /* Get the Part number */ 3144460eeaa0SBen Hutchings i = pci_vpd_find_info_keyword(vpd_data, i, j, "PN"); 3145460eeaa0SBen Hutchings if (i < 0) { 3146460eeaa0SBen Hutchings netif_err(efx, drv, efx->net_dev, "Part number not found\n"); 3147460eeaa0SBen Hutchings return; 3148460eeaa0SBen Hutchings } 3149460eeaa0SBen Hutchings 3150460eeaa0SBen Hutchings j = pci_vpd_info_field_size(&vpd_data[i]); 3151460eeaa0SBen Hutchings i += PCI_VPD_INFO_FLD_HDR_SIZE; 3152460eeaa0SBen Hutchings if (i + j > vpd_size) { 3153460eeaa0SBen Hutchings netif_err(efx, drv, efx->net_dev, "Incomplete part number\n"); 3154460eeaa0SBen Hutchings return; 3155460eeaa0SBen Hutchings } 3156460eeaa0SBen Hutchings 3157460eeaa0SBen Hutchings netif_info(efx, drv, efx->net_dev, 3158460eeaa0SBen Hutchings "Part Number : %.*s\n", j, &vpd_data[i]); 3159ef215e64SBen Hutchings 3160ef215e64SBen Hutchings i = ro_start + PCI_VPD_LRDT_TAG_SIZE; 3161ef215e64SBen Hutchings j = ro_size; 3162ef215e64SBen Hutchings i = pci_vpd_find_info_keyword(vpd_data, i, j, "SN"); 3163ef215e64SBen Hutchings if (i < 0) { 3164ef215e64SBen Hutchings netif_err(efx, drv, efx->net_dev, "Serial number not found\n"); 3165ef215e64SBen Hutchings return; 3166ef215e64SBen Hutchings } 3167ef215e64SBen Hutchings 3168ef215e64SBen Hutchings j = pci_vpd_info_field_size(&vpd_data[i]); 3169ef215e64SBen Hutchings i += PCI_VPD_INFO_FLD_HDR_SIZE; 3170ef215e64SBen Hutchings if (i + j > vpd_size) { 3171ef215e64SBen Hutchings netif_err(efx, drv, efx->net_dev, "Incomplete serial number\n"); 3172ef215e64SBen Hutchings return; 3173ef215e64SBen Hutchings } 3174ef215e64SBen Hutchings 3175ef215e64SBen Hutchings efx->vpd_sn = kmalloc(j + 1, GFP_KERNEL); 3176ef215e64SBen Hutchings if (!efx->vpd_sn) 3177ef215e64SBen Hutchings return; 3178ef215e64SBen Hutchings 3179ef215e64SBen Hutchings snprintf(efx->vpd_sn, j + 1, "%s", &vpd_data[i]); 3180460eeaa0SBen Hutchings } 3181460eeaa0SBen Hutchings 3182460eeaa0SBen Hutchings 3183874aeea5SJeff Kirsher /* Main body of NIC initialisation 3184874aeea5SJeff Kirsher * This is called at module load (or hotplug insertion, theoretically). 3185874aeea5SJeff Kirsher */ 3186874aeea5SJeff Kirsher static int efx_pci_probe_main(struct efx_nic *efx) 3187874aeea5SJeff Kirsher { 3188874aeea5SJeff Kirsher int rc; 3189874aeea5SJeff Kirsher 3190874aeea5SJeff Kirsher /* Do start-of-day initialisation */ 3191874aeea5SJeff Kirsher rc = efx_probe_all(efx); 3192874aeea5SJeff Kirsher if (rc) 3193874aeea5SJeff Kirsher goto fail1; 3194874aeea5SJeff Kirsher 3195874aeea5SJeff Kirsher efx_init_napi(efx); 3196874aeea5SJeff Kirsher 3197874aeea5SJeff Kirsher rc = efx->type->init(efx); 3198874aeea5SJeff Kirsher if (rc) { 3199874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 3200874aeea5SJeff Kirsher "failed to initialise NIC\n"); 3201874aeea5SJeff Kirsher goto fail3; 3202874aeea5SJeff Kirsher } 3203874aeea5SJeff Kirsher 3204874aeea5SJeff Kirsher rc = efx_init_port(efx); 3205874aeea5SJeff Kirsher if (rc) { 3206874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 3207874aeea5SJeff Kirsher "failed to initialise port\n"); 3208874aeea5SJeff Kirsher goto fail4; 3209874aeea5SJeff Kirsher } 3210874aeea5SJeff Kirsher 3211874aeea5SJeff Kirsher rc = efx_nic_init_interrupt(efx); 3212874aeea5SJeff Kirsher if (rc) 3213874aeea5SJeff Kirsher goto fail5; 3214261e4d96SJon Cooper rc = efx_enable_interrupts(efx); 3215261e4d96SJon Cooper if (rc) 3216261e4d96SJon Cooper goto fail6; 3217874aeea5SJeff Kirsher 3218874aeea5SJeff Kirsher return 0; 3219874aeea5SJeff Kirsher 3220261e4d96SJon Cooper fail6: 3221261e4d96SJon Cooper efx_nic_fini_interrupt(efx); 3222874aeea5SJeff Kirsher fail5: 3223874aeea5SJeff Kirsher efx_fini_port(efx); 3224874aeea5SJeff Kirsher fail4: 3225874aeea5SJeff Kirsher efx->type->fini(efx); 3226874aeea5SJeff Kirsher fail3: 3227874aeea5SJeff Kirsher efx_fini_napi(efx); 3228874aeea5SJeff Kirsher efx_remove_all(efx); 3229874aeea5SJeff Kirsher fail1: 3230874aeea5SJeff Kirsher return rc; 3231874aeea5SJeff Kirsher } 3232874aeea5SJeff Kirsher 32338a531400SJon Cooper static int efx_pci_probe_post_io(struct efx_nic *efx) 32348a531400SJon Cooper { 32358a531400SJon Cooper struct net_device *net_dev = efx->net_dev; 32368a531400SJon Cooper int rc = efx_pci_probe_main(efx); 32378a531400SJon Cooper 32388a531400SJon Cooper if (rc) 32398a531400SJon Cooper return rc; 32408a531400SJon Cooper 32418a531400SJon Cooper if (efx->type->sriov_init) { 32428a531400SJon Cooper rc = efx->type->sriov_init(efx); 32438a531400SJon Cooper if (rc) 32448a531400SJon Cooper netif_err(efx, probe, efx->net_dev, 32458a531400SJon Cooper "SR-IOV can't be enabled rc %d\n", rc); 32468a531400SJon Cooper } 32478a531400SJon Cooper 32488a531400SJon Cooper /* Determine netdevice features */ 32498a531400SJon Cooper net_dev->features |= (efx->type->offload_features | NETIF_F_SG | 32506978729fSEdward Cree NETIF_F_TSO | NETIF_F_RXCSUM | NETIF_F_RXALL); 32518a531400SJon Cooper if (efx->type->offload_features & (NETIF_F_IPV6_CSUM | NETIF_F_HW_CSUM)) 32528a531400SJon Cooper net_dev->features |= NETIF_F_TSO6; 32538a531400SJon Cooper /* Check whether device supports TSO */ 32548a531400SJon Cooper if (!efx->type->tso_versions || !efx->type->tso_versions(efx)) 32558a531400SJon Cooper net_dev->features &= ~NETIF_F_ALL_TSO; 32568a531400SJon Cooper /* Mask for features that also apply to VLAN devices */ 32578a531400SJon Cooper net_dev->vlan_features |= (NETIF_F_HW_CSUM | NETIF_F_SG | 32588a531400SJon Cooper NETIF_F_HIGHDMA | NETIF_F_ALL_TSO | 32598a531400SJon Cooper NETIF_F_RXCSUM); 32608a531400SJon Cooper 32616978729fSEdward Cree net_dev->hw_features |= net_dev->features & ~efx->fixed_features; 32626978729fSEdward Cree 32636978729fSEdward Cree /* Disable receiving frames with bad FCS, by default. */ 32646978729fSEdward Cree net_dev->features &= ~NETIF_F_RXALL; 32658a531400SJon Cooper 32668a531400SJon Cooper /* Disable VLAN filtering by default. It may be enforced if 32678a531400SJon Cooper * the feature is fixed (i.e. VLAN filters are required to 32688a531400SJon Cooper * receive VLAN tagged packets due to vPort restrictions). 32698a531400SJon Cooper */ 32708a531400SJon Cooper net_dev->features &= ~NETIF_F_HW_VLAN_CTAG_FILTER; 32718a531400SJon Cooper net_dev->features |= efx->fixed_features; 32728a531400SJon Cooper 32738a531400SJon Cooper rc = efx_register_netdev(efx); 32748a531400SJon Cooper if (!rc) 32758a531400SJon Cooper return 0; 32768a531400SJon Cooper 32778a531400SJon Cooper efx_pci_remove_main(efx); 32788a531400SJon Cooper return rc; 32798a531400SJon Cooper } 32808a531400SJon Cooper 3281874aeea5SJeff Kirsher /* NIC initialisation 3282874aeea5SJeff Kirsher * 3283874aeea5SJeff Kirsher * This is called at module load (or hotplug insertion, 328473ba7b68SBen Hutchings * theoretically). It sets up PCI mappings, resets the NIC, 3285874aeea5SJeff Kirsher * sets up and registers the network devices with the kernel and hooks 3286874aeea5SJeff Kirsher * the interrupt service routine. It does not prepare the device for 3287874aeea5SJeff Kirsher * transmission; this is left to the first time one of the network 3288874aeea5SJeff Kirsher * interfaces is brought up (i.e. efx_net_open). 3289874aeea5SJeff Kirsher */ 329087d1fc11SBill Pemberton static int efx_pci_probe(struct pci_dev *pci_dev, 3291874aeea5SJeff Kirsher const struct pci_device_id *entry) 3292874aeea5SJeff Kirsher { 3293874aeea5SJeff Kirsher struct net_device *net_dev; 3294874aeea5SJeff Kirsher struct efx_nic *efx; 3295fadac6aaSBen Hutchings int rc; 3296874aeea5SJeff Kirsher 3297874aeea5SJeff Kirsher /* Allocate and initialise a struct net_device and struct efx_nic */ 3298874aeea5SJeff Kirsher net_dev = alloc_etherdev_mqs(sizeof(*efx), EFX_MAX_CORE_TX_QUEUES, 3299874aeea5SJeff Kirsher EFX_MAX_RX_QUEUES); 3300874aeea5SJeff Kirsher if (!net_dev) 3301874aeea5SJeff Kirsher return -ENOMEM; 3302adeb15aaSBen Hutchings efx = netdev_priv(net_dev); 3303adeb15aaSBen Hutchings efx->type = (const struct efx_nic_type *) entry->driver_data; 3304ebfcd0fdSAndrew Rybchenko efx->fixed_features |= NETIF_F_HIGHDMA; 3305eb7cfd8cSAndrew Rybchenko 3306874aeea5SJeff Kirsher pci_set_drvdata(pci_dev, efx); 3307874aeea5SJeff Kirsher SET_NETDEV_DEV(net_dev, &pci_dev->dev); 3308adeb15aaSBen Hutchings rc = efx_init_struct(efx, pci_dev, net_dev); 3309874aeea5SJeff Kirsher if (rc) 3310874aeea5SJeff Kirsher goto fail1; 3311874aeea5SJeff Kirsher 3312874aeea5SJeff Kirsher netif_info(efx, probe, efx->net_dev, 3313874aeea5SJeff Kirsher "Solarflare NIC detected\n"); 3314874aeea5SJeff Kirsher 33156f7f8aa6SShradha Shah if (!efx->type->is_vf) 3316ef215e64SBen Hutchings efx_probe_vpd_strings(efx); 3317460eeaa0SBen Hutchings 3318874aeea5SJeff Kirsher /* Set up basic I/O (BAR mappings etc) */ 3319874aeea5SJeff Kirsher rc = efx_init_io(efx); 3320874aeea5SJeff Kirsher if (rc) 3321874aeea5SJeff Kirsher goto fail2; 3322874aeea5SJeff Kirsher 33238a531400SJon Cooper rc = efx_pci_probe_post_io(efx); 33248a531400SJon Cooper if (rc) { 33258a531400SJon Cooper /* On failure, retry once immediately. 33268a531400SJon Cooper * If we aborted probe due to a scheduled reset, dismiss it. 33278a531400SJon Cooper */ 33288a531400SJon Cooper efx->reset_pending = 0; 33298a531400SJon Cooper rc = efx_pci_probe_post_io(efx); 33308a531400SJon Cooper if (rc) { 33318a531400SJon Cooper /* On another failure, retry once more 33328a531400SJon Cooper * after a 50-305ms delay. 33338a531400SJon Cooper */ 33348a531400SJon Cooper unsigned char r; 33358a531400SJon Cooper 33368a531400SJon Cooper get_random_bytes(&r, 1); 33378a531400SJon Cooper msleep((unsigned int)r + 50); 33388a531400SJon Cooper efx->reset_pending = 0; 33398a531400SJon Cooper rc = efx_pci_probe_post_io(efx); 33408a531400SJon Cooper } 33418a531400SJon Cooper } 3342fadac6aaSBen Hutchings if (rc) 3343874aeea5SJeff Kirsher goto fail3; 3344874aeea5SJeff Kirsher 3345874aeea5SJeff Kirsher netif_dbg(efx, probe, efx->net_dev, "initialisation successful\n"); 3346874aeea5SJeff Kirsher 33477c43161cSBen Hutchings /* Try to create MTDs, but allow this to fail */ 3348874aeea5SJeff Kirsher rtnl_lock(); 33497c43161cSBen Hutchings rc = efx_mtd_probe(efx); 3350874aeea5SJeff Kirsher rtnl_unlock(); 335109a04204SBert Kenward if (rc && rc != -EPERM) 33527c43161cSBen Hutchings netif_warn(efx, probe, efx->net_dev, 33537c43161cSBen Hutchings "failed to create MTDs (%d)\n", rc); 33547c43161cSBen Hutchings 3355626950dbSAlexandre Rames rc = pci_enable_pcie_error_reporting(pci_dev); 3356626950dbSAlexandre Rames if (rc && rc != -EINVAL) 335709a04204SBert Kenward netif_notice(efx, probe, efx->net_dev, 335809a04204SBert Kenward "PCIE error reporting unavailable (%d).\n", 335909a04204SBert Kenward rc); 3360626950dbSAlexandre Rames 3361e5fbd977SJon Cooper if (efx->type->udp_tnl_push_ports) 3362e5fbd977SJon Cooper efx->type->udp_tnl_push_ports(efx); 3363e5fbd977SJon Cooper 3364874aeea5SJeff Kirsher return 0; 3365874aeea5SJeff Kirsher 3366874aeea5SJeff Kirsher fail3: 3367874aeea5SJeff Kirsher efx_fini_io(efx); 3368874aeea5SJeff Kirsher fail2: 3369874aeea5SJeff Kirsher efx_fini_struct(efx); 3370874aeea5SJeff Kirsher fail1: 3371874aeea5SJeff Kirsher WARN_ON(rc > 0); 3372874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "initialisation failed. rc=%d\n", rc); 3373874aeea5SJeff Kirsher free_netdev(net_dev); 3374874aeea5SJeff Kirsher return rc; 3375874aeea5SJeff Kirsher } 3376874aeea5SJeff Kirsher 3377834e23ddSShradha Shah /* efx_pci_sriov_configure returns the actual number of Virtual Functions 3378834e23ddSShradha Shah * enabled on success 3379834e23ddSShradha Shah */ 3380834e23ddSShradha Shah #ifdef CONFIG_SFC_SRIOV 3381834e23ddSShradha Shah static int efx_pci_sriov_configure(struct pci_dev *dev, int num_vfs) 3382834e23ddSShradha Shah { 3383834e23ddSShradha Shah int rc; 3384834e23ddSShradha Shah struct efx_nic *efx = pci_get_drvdata(dev); 3385834e23ddSShradha Shah 3386834e23ddSShradha Shah if (efx->type->sriov_configure) { 3387834e23ddSShradha Shah rc = efx->type->sriov_configure(efx, num_vfs); 3388834e23ddSShradha Shah if (rc) 3389834e23ddSShradha Shah return rc; 3390834e23ddSShradha Shah else 3391834e23ddSShradha Shah return num_vfs; 3392834e23ddSShradha Shah } else 3393834e23ddSShradha Shah return -EOPNOTSUPP; 3394834e23ddSShradha Shah } 3395834e23ddSShradha Shah #endif 3396834e23ddSShradha Shah 3397874aeea5SJeff Kirsher static int efx_pm_freeze(struct device *dev) 3398874aeea5SJeff Kirsher { 3399874aeea5SJeff Kirsher struct efx_nic *efx = pci_get_drvdata(to_pci_dev(dev)); 3400874aeea5SJeff Kirsher 340161da026dSBen Hutchings rtnl_lock(); 340261da026dSBen Hutchings 34036032fb56SBen Hutchings if (efx->state != STATE_DISABLED) { 3404f16aeea0SBen Hutchings efx->state = STATE_UNINIT; 3405874aeea5SJeff Kirsher 3406c2f3b8e3SDaniel Pieczko efx_device_detach_sync(efx); 3407874aeea5SJeff Kirsher 3408874aeea5SJeff Kirsher efx_stop_all(efx); 3409d8291187SBen Hutchings efx_disable_interrupts(efx); 34106032fb56SBen Hutchings } 3411874aeea5SJeff Kirsher 341261da026dSBen Hutchings rtnl_unlock(); 341361da026dSBen Hutchings 3414874aeea5SJeff Kirsher return 0; 3415874aeea5SJeff Kirsher } 3416874aeea5SJeff Kirsher 3417874aeea5SJeff Kirsher static int efx_pm_thaw(struct device *dev) 3418874aeea5SJeff Kirsher { 3419261e4d96SJon Cooper int rc; 3420874aeea5SJeff Kirsher struct efx_nic *efx = pci_get_drvdata(to_pci_dev(dev)); 3421874aeea5SJeff Kirsher 342261da026dSBen Hutchings rtnl_lock(); 342361da026dSBen Hutchings 34246032fb56SBen Hutchings if (efx->state != STATE_DISABLED) { 3425261e4d96SJon Cooper rc = efx_enable_interrupts(efx); 3426261e4d96SJon Cooper if (rc) 3427261e4d96SJon Cooper goto fail; 3428874aeea5SJeff Kirsher 3429874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 3430874aeea5SJeff Kirsher efx->phy_op->reconfigure(efx); 3431874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 3432874aeea5SJeff Kirsher 3433874aeea5SJeff Kirsher efx_start_all(efx); 3434874aeea5SJeff Kirsher 34359c568fd8SPeter Dunning efx_device_attach_if_not_resetting(efx); 3436874aeea5SJeff Kirsher 3437f16aeea0SBen Hutchings efx->state = STATE_READY; 3438874aeea5SJeff Kirsher 3439874aeea5SJeff Kirsher efx->type->resume_wol(efx); 34406032fb56SBen Hutchings } 3441874aeea5SJeff Kirsher 344261da026dSBen Hutchings rtnl_unlock(); 344361da026dSBen Hutchings 3444874aeea5SJeff Kirsher /* Reschedule any quenched resets scheduled during efx_pm_freeze() */ 3445874aeea5SJeff Kirsher queue_work(reset_workqueue, &efx->reset_work); 3446874aeea5SJeff Kirsher 3447874aeea5SJeff Kirsher return 0; 3448261e4d96SJon Cooper 3449261e4d96SJon Cooper fail: 3450261e4d96SJon Cooper rtnl_unlock(); 3451261e4d96SJon Cooper 3452261e4d96SJon Cooper return rc; 3453874aeea5SJeff Kirsher } 3454874aeea5SJeff Kirsher 3455874aeea5SJeff Kirsher static int efx_pm_poweroff(struct device *dev) 3456874aeea5SJeff Kirsher { 3457874aeea5SJeff Kirsher struct pci_dev *pci_dev = to_pci_dev(dev); 3458874aeea5SJeff Kirsher struct efx_nic *efx = pci_get_drvdata(pci_dev); 3459874aeea5SJeff Kirsher 3460874aeea5SJeff Kirsher efx->type->fini(efx); 3461874aeea5SJeff Kirsher 3462874aeea5SJeff Kirsher efx->reset_pending = 0; 3463874aeea5SJeff Kirsher 3464874aeea5SJeff Kirsher pci_save_state(pci_dev); 3465874aeea5SJeff Kirsher return pci_set_power_state(pci_dev, PCI_D3hot); 3466874aeea5SJeff Kirsher } 3467874aeea5SJeff Kirsher 3468874aeea5SJeff Kirsher /* Used for both resume and restore */ 3469874aeea5SJeff Kirsher static int efx_pm_resume(struct device *dev) 3470874aeea5SJeff Kirsher { 3471874aeea5SJeff Kirsher struct pci_dev *pci_dev = to_pci_dev(dev); 3472874aeea5SJeff Kirsher struct efx_nic *efx = pci_get_drvdata(pci_dev); 3473874aeea5SJeff Kirsher int rc; 3474874aeea5SJeff Kirsher 3475874aeea5SJeff Kirsher rc = pci_set_power_state(pci_dev, PCI_D0); 3476874aeea5SJeff Kirsher if (rc) 3477874aeea5SJeff Kirsher return rc; 3478874aeea5SJeff Kirsher pci_restore_state(pci_dev); 3479874aeea5SJeff Kirsher rc = pci_enable_device(pci_dev); 3480874aeea5SJeff Kirsher if (rc) 3481874aeea5SJeff Kirsher return rc; 3482874aeea5SJeff Kirsher pci_set_master(efx->pci_dev); 3483874aeea5SJeff Kirsher rc = efx->type->reset(efx, RESET_TYPE_ALL); 3484874aeea5SJeff Kirsher if (rc) 3485874aeea5SJeff Kirsher return rc; 3486874aeea5SJeff Kirsher rc = efx->type->init(efx); 3487874aeea5SJeff Kirsher if (rc) 3488874aeea5SJeff Kirsher return rc; 3489261e4d96SJon Cooper rc = efx_pm_thaw(dev); 3490261e4d96SJon Cooper return rc; 3491874aeea5SJeff Kirsher } 3492874aeea5SJeff Kirsher 3493874aeea5SJeff Kirsher static int efx_pm_suspend(struct device *dev) 3494874aeea5SJeff Kirsher { 3495874aeea5SJeff Kirsher int rc; 3496874aeea5SJeff Kirsher 3497874aeea5SJeff Kirsher efx_pm_freeze(dev); 3498874aeea5SJeff Kirsher rc = efx_pm_poweroff(dev); 3499874aeea5SJeff Kirsher if (rc) 3500874aeea5SJeff Kirsher efx_pm_resume(dev); 3501874aeea5SJeff Kirsher return rc; 3502874aeea5SJeff Kirsher } 3503874aeea5SJeff Kirsher 350418e83e4cSBen Hutchings static const struct dev_pm_ops efx_pm_ops = { 3505874aeea5SJeff Kirsher .suspend = efx_pm_suspend, 3506874aeea5SJeff Kirsher .resume = efx_pm_resume, 3507874aeea5SJeff Kirsher .freeze = efx_pm_freeze, 3508874aeea5SJeff Kirsher .thaw = efx_pm_thaw, 3509874aeea5SJeff Kirsher .poweroff = efx_pm_poweroff, 3510874aeea5SJeff Kirsher .restore = efx_pm_resume, 3511874aeea5SJeff Kirsher }; 3512874aeea5SJeff Kirsher 3513626950dbSAlexandre Rames /* A PCI error affecting this device was detected. 3514626950dbSAlexandre Rames * At this point MMIO and DMA may be disabled. 3515626950dbSAlexandre Rames * Stop the software path and request a slot reset. 3516626950dbSAlexandre Rames */ 3517debd0034Sstephen hemminger static pci_ers_result_t efx_io_error_detected(struct pci_dev *pdev, 3518626950dbSAlexandre Rames enum pci_channel_state state) 3519626950dbSAlexandre Rames { 3520626950dbSAlexandre Rames pci_ers_result_t status = PCI_ERS_RESULT_RECOVERED; 3521626950dbSAlexandre Rames struct efx_nic *efx = pci_get_drvdata(pdev); 3522626950dbSAlexandre Rames 3523626950dbSAlexandre Rames if (state == pci_channel_io_perm_failure) 3524626950dbSAlexandre Rames return PCI_ERS_RESULT_DISCONNECT; 3525626950dbSAlexandre Rames 3526626950dbSAlexandre Rames rtnl_lock(); 3527626950dbSAlexandre Rames 3528626950dbSAlexandre Rames if (efx->state != STATE_DISABLED) { 3529626950dbSAlexandre Rames efx->state = STATE_RECOVERY; 3530626950dbSAlexandre Rames efx->reset_pending = 0; 3531626950dbSAlexandre Rames 3532626950dbSAlexandre Rames efx_device_detach_sync(efx); 3533626950dbSAlexandre Rames 3534626950dbSAlexandre Rames efx_stop_all(efx); 3535d8291187SBen Hutchings efx_disable_interrupts(efx); 3536626950dbSAlexandre Rames 3537626950dbSAlexandre Rames status = PCI_ERS_RESULT_NEED_RESET; 3538626950dbSAlexandre Rames } else { 3539626950dbSAlexandre Rames /* If the interface is disabled we don't want to do anything 3540626950dbSAlexandre Rames * with it. 3541626950dbSAlexandre Rames */ 3542626950dbSAlexandre Rames status = PCI_ERS_RESULT_RECOVERED; 3543626950dbSAlexandre Rames } 3544626950dbSAlexandre Rames 3545626950dbSAlexandre Rames rtnl_unlock(); 3546626950dbSAlexandre Rames 3547626950dbSAlexandre Rames pci_disable_device(pdev); 3548626950dbSAlexandre Rames 3549626950dbSAlexandre Rames return status; 3550626950dbSAlexandre Rames } 3551626950dbSAlexandre Rames 3552dbedd44eSJoe Perches /* Fake a successful reset, which will be performed later in efx_io_resume. */ 3553debd0034Sstephen hemminger static pci_ers_result_t efx_io_slot_reset(struct pci_dev *pdev) 3554626950dbSAlexandre Rames { 3555626950dbSAlexandre Rames struct efx_nic *efx = pci_get_drvdata(pdev); 3556626950dbSAlexandre Rames pci_ers_result_t status = PCI_ERS_RESULT_RECOVERED; 3557626950dbSAlexandre Rames int rc; 3558626950dbSAlexandre Rames 3559626950dbSAlexandre Rames if (pci_enable_device(pdev)) { 3560626950dbSAlexandre Rames netif_err(efx, hw, efx->net_dev, 3561626950dbSAlexandre Rames "Cannot re-enable PCI device after reset.\n"); 3562626950dbSAlexandre Rames status = PCI_ERS_RESULT_DISCONNECT; 3563626950dbSAlexandre Rames } 3564626950dbSAlexandre Rames 3565626950dbSAlexandre Rames rc = pci_cleanup_aer_uncorrect_error_status(pdev); 3566626950dbSAlexandre Rames if (rc) { 3567626950dbSAlexandre Rames netif_err(efx, hw, efx->net_dev, 3568626950dbSAlexandre Rames "pci_cleanup_aer_uncorrect_error_status failed (%d)\n", rc); 3569626950dbSAlexandre Rames /* Non-fatal error. Continue. */ 3570626950dbSAlexandre Rames } 3571626950dbSAlexandre Rames 3572626950dbSAlexandre Rames return status; 3573626950dbSAlexandre Rames } 3574626950dbSAlexandre Rames 3575626950dbSAlexandre Rames /* Perform the actual reset and resume I/O operations. */ 3576626950dbSAlexandre Rames static void efx_io_resume(struct pci_dev *pdev) 3577626950dbSAlexandre Rames { 3578626950dbSAlexandre Rames struct efx_nic *efx = pci_get_drvdata(pdev); 3579626950dbSAlexandre Rames int rc; 3580626950dbSAlexandre Rames 3581626950dbSAlexandre Rames rtnl_lock(); 3582626950dbSAlexandre Rames 3583626950dbSAlexandre Rames if (efx->state == STATE_DISABLED) 3584626950dbSAlexandre Rames goto out; 3585626950dbSAlexandre Rames 3586626950dbSAlexandre Rames rc = efx_reset(efx, RESET_TYPE_ALL); 3587626950dbSAlexandre Rames if (rc) { 3588626950dbSAlexandre Rames netif_err(efx, hw, efx->net_dev, 3589626950dbSAlexandre Rames "efx_reset failed after PCI error (%d)\n", rc); 3590626950dbSAlexandre Rames } else { 3591626950dbSAlexandre Rames efx->state = STATE_READY; 3592626950dbSAlexandre Rames netif_dbg(efx, hw, efx->net_dev, 3593626950dbSAlexandre Rames "Done resetting and resuming IO after PCI error.\n"); 3594626950dbSAlexandre Rames } 3595626950dbSAlexandre Rames 3596626950dbSAlexandre Rames out: 3597626950dbSAlexandre Rames rtnl_unlock(); 3598626950dbSAlexandre Rames } 3599626950dbSAlexandre Rames 3600626950dbSAlexandre Rames /* For simplicity and reliability, we always require a slot reset and try to 3601626950dbSAlexandre Rames * reset the hardware when a pci error affecting the device is detected. 3602626950dbSAlexandre Rames * We leave both the link_reset and mmio_enabled callback unimplemented: 3603626950dbSAlexandre Rames * with our request for slot reset the mmio_enabled callback will never be 3604626950dbSAlexandre Rames * called, and the link_reset callback is not used by AER or EEH mechanisms. 3605626950dbSAlexandre Rames */ 3606c300366bSJulia Lawall static const struct pci_error_handlers efx_err_handlers = { 3607626950dbSAlexandre Rames .error_detected = efx_io_error_detected, 3608626950dbSAlexandre Rames .slot_reset = efx_io_slot_reset, 3609626950dbSAlexandre Rames .resume = efx_io_resume, 3610626950dbSAlexandre Rames }; 3611626950dbSAlexandre Rames 3612874aeea5SJeff Kirsher static struct pci_driver efx_pci_driver = { 3613874aeea5SJeff Kirsher .name = KBUILD_MODNAME, 3614874aeea5SJeff Kirsher .id_table = efx_pci_table, 3615874aeea5SJeff Kirsher .probe = efx_pci_probe, 3616874aeea5SJeff Kirsher .remove = efx_pci_remove, 3617874aeea5SJeff Kirsher .driver.pm = &efx_pm_ops, 3618626950dbSAlexandre Rames .err_handler = &efx_err_handlers, 3619834e23ddSShradha Shah #ifdef CONFIG_SFC_SRIOV 3620834e23ddSShradha Shah .sriov_configure = efx_pci_sriov_configure, 3621834e23ddSShradha Shah #endif 3622874aeea5SJeff Kirsher }; 3623874aeea5SJeff Kirsher 3624874aeea5SJeff Kirsher /************************************************************************** 3625874aeea5SJeff Kirsher * 3626874aeea5SJeff Kirsher * Kernel module interface 3627874aeea5SJeff Kirsher * 3628874aeea5SJeff Kirsher *************************************************************************/ 3629874aeea5SJeff Kirsher 3630874aeea5SJeff Kirsher module_param(interrupt_mode, uint, 0444); 3631874aeea5SJeff Kirsher MODULE_PARM_DESC(interrupt_mode, 3632874aeea5SJeff Kirsher "Interrupt mode (0=>MSIX 1=>MSI 2=>legacy)"); 3633874aeea5SJeff Kirsher 3634874aeea5SJeff Kirsher static int __init efx_init_module(void) 3635874aeea5SJeff Kirsher { 3636874aeea5SJeff Kirsher int rc; 3637874aeea5SJeff Kirsher 3638874aeea5SJeff Kirsher printk(KERN_INFO "Solarflare NET driver v" EFX_DRIVER_VERSION "\n"); 3639874aeea5SJeff Kirsher 3640874aeea5SJeff Kirsher rc = register_netdevice_notifier(&efx_netdev_notifier); 3641874aeea5SJeff Kirsher if (rc) 3642874aeea5SJeff Kirsher goto err_notifier; 3643874aeea5SJeff Kirsher 36447fa8d547SShradha Shah #ifdef CONFIG_SFC_SRIOV 3645cd2d5b52SBen Hutchings rc = efx_init_sriov(); 3646cd2d5b52SBen Hutchings if (rc) 3647cd2d5b52SBen Hutchings goto err_sriov; 36487fa8d547SShradha Shah #endif 3649cd2d5b52SBen Hutchings 3650874aeea5SJeff Kirsher reset_workqueue = create_singlethread_workqueue("sfc_reset"); 3651874aeea5SJeff Kirsher if (!reset_workqueue) { 3652874aeea5SJeff Kirsher rc = -ENOMEM; 3653874aeea5SJeff Kirsher goto err_reset; 3654874aeea5SJeff Kirsher } 3655874aeea5SJeff Kirsher 3656874aeea5SJeff Kirsher rc = pci_register_driver(&efx_pci_driver); 3657874aeea5SJeff Kirsher if (rc < 0) 3658874aeea5SJeff Kirsher goto err_pci; 3659874aeea5SJeff Kirsher 3660874aeea5SJeff Kirsher return 0; 3661874aeea5SJeff Kirsher 3662874aeea5SJeff Kirsher err_pci: 3663874aeea5SJeff Kirsher destroy_workqueue(reset_workqueue); 3664874aeea5SJeff Kirsher err_reset: 36657fa8d547SShradha Shah #ifdef CONFIG_SFC_SRIOV 3666cd2d5b52SBen Hutchings efx_fini_sriov(); 3667cd2d5b52SBen Hutchings err_sriov: 36687fa8d547SShradha Shah #endif 3669874aeea5SJeff Kirsher unregister_netdevice_notifier(&efx_netdev_notifier); 3670874aeea5SJeff Kirsher err_notifier: 3671874aeea5SJeff Kirsher return rc; 3672874aeea5SJeff Kirsher } 3673874aeea5SJeff Kirsher 3674874aeea5SJeff Kirsher static void __exit efx_exit_module(void) 3675874aeea5SJeff Kirsher { 3676874aeea5SJeff Kirsher printk(KERN_INFO "Solarflare NET driver unloading\n"); 3677874aeea5SJeff Kirsher 3678874aeea5SJeff Kirsher pci_unregister_driver(&efx_pci_driver); 3679874aeea5SJeff Kirsher destroy_workqueue(reset_workqueue); 36807fa8d547SShradha Shah #ifdef CONFIG_SFC_SRIOV 3681cd2d5b52SBen Hutchings efx_fini_sriov(); 36827fa8d547SShradha Shah #endif 3683874aeea5SJeff Kirsher unregister_netdevice_notifier(&efx_netdev_notifier); 3684874aeea5SJeff Kirsher 3685874aeea5SJeff Kirsher } 3686874aeea5SJeff Kirsher 3687874aeea5SJeff Kirsher module_init(efx_init_module); 3688874aeea5SJeff Kirsher module_exit(efx_exit_module); 3689874aeea5SJeff Kirsher 3690874aeea5SJeff Kirsher MODULE_AUTHOR("Solarflare Communications and " 3691874aeea5SJeff Kirsher "Michael Brown <mbrown@fensystems.co.uk>"); 36926a350fdbSBen Hutchings MODULE_DESCRIPTION("Solarflare network driver"); 3693874aeea5SJeff Kirsher MODULE_LICENSE("GPL"); 3694874aeea5SJeff Kirsher MODULE_DEVICE_TABLE(pci, efx_pci_table); 369514077e9eSEdward Cree MODULE_VERSION(EFX_DRIVER_VERSION); 3696