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" 30dd40781eSBen Hutchings #include "selftest.h" 317fa8d547SShradha Shah #include "sriov.h" 32874aeea5SJeff Kirsher 33874aeea5SJeff Kirsher #include "mcdi.h" 34e5fbd977SJon Cooper #include "mcdi_pcol.h" 35874aeea5SJeff Kirsher #include "workarounds.h" 36874aeea5SJeff Kirsher 37874aeea5SJeff Kirsher /************************************************************************** 38874aeea5SJeff Kirsher * 39874aeea5SJeff Kirsher * Type name strings 40874aeea5SJeff Kirsher * 41874aeea5SJeff Kirsher ************************************************************************** 42874aeea5SJeff Kirsher */ 43874aeea5SJeff Kirsher 44874aeea5SJeff Kirsher /* Loopback mode names (see LOOPBACK_MODE()) */ 45874aeea5SJeff Kirsher const unsigned int efx_loopback_mode_max = LOOPBACK_MAX; 4618e83e4cSBen Hutchings const char *const efx_loopback_mode_names[] = { 47874aeea5SJeff Kirsher [LOOPBACK_NONE] = "NONE", 48874aeea5SJeff Kirsher [LOOPBACK_DATA] = "DATAPATH", 49874aeea5SJeff Kirsher [LOOPBACK_GMAC] = "GMAC", 50874aeea5SJeff Kirsher [LOOPBACK_XGMII] = "XGMII", 51874aeea5SJeff Kirsher [LOOPBACK_XGXS] = "XGXS", 52874aeea5SJeff Kirsher [LOOPBACK_XAUI] = "XAUI", 53874aeea5SJeff Kirsher [LOOPBACK_GMII] = "GMII", 54874aeea5SJeff Kirsher [LOOPBACK_SGMII] = "SGMII", 55874aeea5SJeff Kirsher [LOOPBACK_XGBR] = "XGBR", 56874aeea5SJeff Kirsher [LOOPBACK_XFI] = "XFI", 57874aeea5SJeff Kirsher [LOOPBACK_XAUI_FAR] = "XAUI_FAR", 58874aeea5SJeff Kirsher [LOOPBACK_GMII_FAR] = "GMII_FAR", 59874aeea5SJeff Kirsher [LOOPBACK_SGMII_FAR] = "SGMII_FAR", 60874aeea5SJeff Kirsher [LOOPBACK_XFI_FAR] = "XFI_FAR", 61874aeea5SJeff Kirsher [LOOPBACK_GPHY] = "GPHY", 62874aeea5SJeff Kirsher [LOOPBACK_PHYXS] = "PHYXS", 63874aeea5SJeff Kirsher [LOOPBACK_PCS] = "PCS", 64874aeea5SJeff Kirsher [LOOPBACK_PMAPMD] = "PMA/PMD", 65874aeea5SJeff Kirsher [LOOPBACK_XPORT] = "XPORT", 66874aeea5SJeff Kirsher [LOOPBACK_XGMII_WS] = "XGMII_WS", 67874aeea5SJeff Kirsher [LOOPBACK_XAUI_WS] = "XAUI_WS", 68874aeea5SJeff Kirsher [LOOPBACK_XAUI_WS_FAR] = "XAUI_WS_FAR", 69874aeea5SJeff Kirsher [LOOPBACK_XAUI_WS_NEAR] = "XAUI_WS_NEAR", 70874aeea5SJeff Kirsher [LOOPBACK_GMII_WS] = "GMII_WS", 71874aeea5SJeff Kirsher [LOOPBACK_XFI_WS] = "XFI_WS", 72874aeea5SJeff Kirsher [LOOPBACK_XFI_WS_FAR] = "XFI_WS_FAR", 73874aeea5SJeff Kirsher [LOOPBACK_PHYXS_WS] = "PHYXS_WS", 74874aeea5SJeff Kirsher }; 75874aeea5SJeff Kirsher 76874aeea5SJeff Kirsher const unsigned int efx_reset_type_max = RESET_TYPE_MAX; 7718e83e4cSBen Hutchings const char *const efx_reset_type_names[] = { 78874aeea5SJeff Kirsher [RESET_TYPE_INVISIBLE] = "INVISIBLE", 79874aeea5SJeff Kirsher [RESET_TYPE_ALL] = "ALL", 80626950dbSAlexandre Rames [RESET_TYPE_RECOVER_OR_ALL] = "RECOVER_OR_ALL", 81874aeea5SJeff Kirsher [RESET_TYPE_WORLD] = "WORLD", 82626950dbSAlexandre Rames [RESET_TYPE_RECOVER_OR_DISABLE] = "RECOVER_OR_DISABLE", 83087e9025SJon Cooper [RESET_TYPE_DATAPATH] = "DATAPATH", 84e283546cSEdward Cree [RESET_TYPE_MC_BIST] = "MC_BIST", 85874aeea5SJeff Kirsher [RESET_TYPE_DISABLE] = "DISABLE", 86874aeea5SJeff Kirsher [RESET_TYPE_TX_WATCHDOG] = "TX_WATCHDOG", 87874aeea5SJeff Kirsher [RESET_TYPE_INT_ERROR] = "INT_ERROR", 883de82b91SAlexandre Rames [RESET_TYPE_DMA_ERROR] = "DMA_ERROR", 89874aeea5SJeff Kirsher [RESET_TYPE_TX_SKIP] = "TX_SKIP", 90874aeea5SJeff Kirsher [RESET_TYPE_MC_FAILURE] = "MC_FAILURE", 91e283546cSEdward Cree [RESET_TYPE_MCDI_TIMEOUT] = "MCDI_TIMEOUT (FLR)", 92874aeea5SJeff Kirsher }; 93874aeea5SJeff Kirsher 94e5fbd977SJon Cooper /* UDP tunnel type names */ 95e5fbd977SJon Cooper static const char *const efx_udp_tunnel_type_names[] = { 96e5fbd977SJon Cooper [TUNNEL_ENCAP_UDP_PORT_ENTRY_VXLAN] = "vxlan", 97e5fbd977SJon Cooper [TUNNEL_ENCAP_UDP_PORT_ENTRY_GENEVE] = "geneve", 98e5fbd977SJon Cooper }; 99e5fbd977SJon Cooper 100e5fbd977SJon Cooper void efx_get_udp_tunnel_type_name(u16 type, char *buf, size_t buflen) 101e5fbd977SJon Cooper { 102e5fbd977SJon Cooper if (type < ARRAY_SIZE(efx_udp_tunnel_type_names) && 103e5fbd977SJon Cooper efx_udp_tunnel_type_names[type] != NULL) 104e5fbd977SJon Cooper snprintf(buf, buflen, "%s", efx_udp_tunnel_type_names[type]); 105e5fbd977SJon Cooper else 106e5fbd977SJon Cooper snprintf(buf, buflen, "type %d", type); 107e5fbd977SJon Cooper } 108e5fbd977SJon Cooper 109874aeea5SJeff Kirsher /* Reset workqueue. If any NIC has a hardware failure then a reset will be 110874aeea5SJeff Kirsher * queued onto this work queue. This is not a per-nic work queue, because 111874aeea5SJeff Kirsher * efx_reset_work() acquires the rtnl lock, so resets are naturally serialised. 112874aeea5SJeff Kirsher */ 113874aeea5SJeff Kirsher static struct workqueue_struct *reset_workqueue; 114874aeea5SJeff Kirsher 11574cd60a4SJon Cooper /* How often and how many times to poll for a reset while waiting for a 11674cd60a4SJon Cooper * BIST that another function started to complete. 11774cd60a4SJon Cooper */ 11874cd60a4SJon Cooper #define BIST_WAIT_DELAY_MS 100 11974cd60a4SJon Cooper #define BIST_WAIT_DELAY_COUNT 100 12074cd60a4SJon Cooper 121874aeea5SJeff Kirsher /************************************************************************** 122874aeea5SJeff Kirsher * 123874aeea5SJeff Kirsher * Configurable values 124874aeea5SJeff Kirsher * 125874aeea5SJeff Kirsher *************************************************************************/ 126874aeea5SJeff Kirsher 127874aeea5SJeff Kirsher /* 128874aeea5SJeff Kirsher * Use separate channels for TX and RX events 129874aeea5SJeff Kirsher * 130874aeea5SJeff Kirsher * Set this to 1 to use separate channels for TX and RX. It allows us 131874aeea5SJeff Kirsher * to control interrupt affinity separately for TX and RX. 132874aeea5SJeff Kirsher * 133874aeea5SJeff Kirsher * This is only used in MSI-X interrupt mode 134874aeea5SJeff Kirsher */ 135b0fbdae1SShradha Shah bool efx_separate_tx_channels; 136b0fbdae1SShradha Shah module_param(efx_separate_tx_channels, bool, 0444); 137b0fbdae1SShradha Shah MODULE_PARM_DESC(efx_separate_tx_channels, 138874aeea5SJeff Kirsher "Use separate channels for TX and RX"); 139874aeea5SJeff Kirsher 140874aeea5SJeff Kirsher /* This is the weight assigned to each of the (per-channel) virtual 141874aeea5SJeff Kirsher * NAPI devices. 142874aeea5SJeff Kirsher */ 143874aeea5SJeff Kirsher static int napi_weight = 64; 144874aeea5SJeff Kirsher 145874aeea5SJeff Kirsher /* This is the time (in jiffies) between invocations of the hardware 146626950dbSAlexandre Rames * monitor. 147626950dbSAlexandre Rames * On Falcon-based NICs, this will: 148874aeea5SJeff Kirsher * - Check the on-board hardware monitor; 149874aeea5SJeff Kirsher * - Poll the link state and reconfigure the hardware as necessary. 150626950dbSAlexandre Rames * On Siena-based NICs for power systems with EEH support, this will give EEH a 151626950dbSAlexandre Rames * chance to start. 152874aeea5SJeff Kirsher */ 153874aeea5SJeff Kirsher static unsigned int efx_monitor_interval = 1 * HZ; 154874aeea5SJeff Kirsher 155874aeea5SJeff Kirsher /* Initial interrupt moderation settings. They can be modified after 156874aeea5SJeff Kirsher * module load with ethtool. 157874aeea5SJeff Kirsher * 158874aeea5SJeff Kirsher * The default for RX should strike a balance between increasing the 159874aeea5SJeff Kirsher * round-trip latency and reducing overhead. 160874aeea5SJeff Kirsher */ 161874aeea5SJeff Kirsher static unsigned int rx_irq_mod_usec = 60; 162874aeea5SJeff Kirsher 163874aeea5SJeff Kirsher /* Initial interrupt moderation settings. They can be modified after 164874aeea5SJeff Kirsher * module load with ethtool. 165874aeea5SJeff Kirsher * 166874aeea5SJeff Kirsher * This default is chosen to ensure that a 10G link does not go idle 167874aeea5SJeff Kirsher * while a TX queue is stopped after it has become full. A queue is 168874aeea5SJeff Kirsher * restarted when it drops below half full. The time this takes (assuming 169874aeea5SJeff Kirsher * worst case 3 descriptors per packet and 1024 descriptors) is 170874aeea5SJeff Kirsher * 512 / 3 * 1.2 = 205 usec. 171874aeea5SJeff Kirsher */ 172874aeea5SJeff Kirsher static unsigned int tx_irq_mod_usec = 150; 173874aeea5SJeff Kirsher 174874aeea5SJeff Kirsher /* This is the first interrupt mode to try out of: 175874aeea5SJeff Kirsher * 0 => MSI-X 176874aeea5SJeff Kirsher * 1 => MSI 177874aeea5SJeff Kirsher * 2 => legacy 178874aeea5SJeff Kirsher */ 179874aeea5SJeff Kirsher static unsigned int interrupt_mode; 180874aeea5SJeff Kirsher 181874aeea5SJeff Kirsher /* This is the requested number of CPUs to use for Receive-Side Scaling (RSS), 182874aeea5SJeff Kirsher * i.e. the number of CPUs among which we may distribute simultaneous 183874aeea5SJeff Kirsher * interrupt handling. 184874aeea5SJeff Kirsher * 185874aeea5SJeff Kirsher * Cards without MSI-X will only target one CPU via legacy or MSI interrupt. 186cdb08f8fSBen Hutchings * The default (0) means to assign an interrupt to each core. 187874aeea5SJeff Kirsher */ 188874aeea5SJeff Kirsher static unsigned int rss_cpus; 189874aeea5SJeff Kirsher module_param(rss_cpus, uint, 0444); 190874aeea5SJeff Kirsher MODULE_PARM_DESC(rss_cpus, "Number of CPUs to use for Receive-Side Scaling"); 191874aeea5SJeff Kirsher 192b9cc977dSBen Hutchings static bool phy_flash_cfg; 193b9cc977dSBen Hutchings module_param(phy_flash_cfg, bool, 0644); 194874aeea5SJeff Kirsher MODULE_PARM_DESC(phy_flash_cfg, "Set PHYs into reflash mode initially"); 195874aeea5SJeff Kirsher 196e7bed9c8SBen Hutchings static unsigned irq_adapt_low_thresh = 8000; 197874aeea5SJeff Kirsher module_param(irq_adapt_low_thresh, uint, 0644); 198874aeea5SJeff Kirsher MODULE_PARM_DESC(irq_adapt_low_thresh, 199874aeea5SJeff Kirsher "Threshold score for reducing IRQ moderation"); 200874aeea5SJeff Kirsher 201e7bed9c8SBen Hutchings static unsigned irq_adapt_high_thresh = 16000; 202874aeea5SJeff Kirsher module_param(irq_adapt_high_thresh, uint, 0644); 203874aeea5SJeff Kirsher MODULE_PARM_DESC(irq_adapt_high_thresh, 204874aeea5SJeff Kirsher "Threshold score for increasing IRQ moderation"); 205874aeea5SJeff Kirsher 206874aeea5SJeff Kirsher static unsigned debug = (NETIF_MSG_DRV | NETIF_MSG_PROBE | 207874aeea5SJeff Kirsher NETIF_MSG_LINK | NETIF_MSG_IFDOWN | 208874aeea5SJeff Kirsher NETIF_MSG_IFUP | NETIF_MSG_RX_ERR | 209874aeea5SJeff Kirsher NETIF_MSG_TX_ERR | NETIF_MSG_HW); 210874aeea5SJeff Kirsher module_param(debug, uint, 0); 211874aeea5SJeff Kirsher MODULE_PARM_DESC(debug, "Bitmapped debugging message enable value"); 212874aeea5SJeff Kirsher 213874aeea5SJeff Kirsher /************************************************************************** 214874aeea5SJeff Kirsher * 215874aeea5SJeff Kirsher * Utility functions and prototypes 216874aeea5SJeff Kirsher * 217874aeea5SJeff Kirsher *************************************************************************/ 218874aeea5SJeff Kirsher 219261e4d96SJon Cooper static int efx_soft_enable_interrupts(struct efx_nic *efx); 220d8291187SBen Hutchings static void efx_soft_disable_interrupts(struct efx_nic *efx); 2217f967c01SBen Hutchings static void efx_remove_channel(struct efx_channel *channel); 222874aeea5SJeff Kirsher static void efx_remove_channels(struct efx_nic *efx); 2237f967c01SBen Hutchings static const struct efx_channel_type efx_default_channel_type; 224874aeea5SJeff Kirsher static void efx_remove_port(struct efx_nic *efx); 2257f967c01SBen Hutchings static void efx_init_napi_channel(struct efx_channel *channel); 226874aeea5SJeff Kirsher static void efx_fini_napi(struct efx_nic *efx); 227874aeea5SJeff Kirsher static void efx_fini_napi_channel(struct efx_channel *channel); 228874aeea5SJeff Kirsher static void efx_fini_struct(struct efx_nic *efx); 229874aeea5SJeff Kirsher static void efx_start_all(struct efx_nic *efx); 230874aeea5SJeff Kirsher static void efx_stop_all(struct efx_nic *efx); 231874aeea5SJeff Kirsher 232874aeea5SJeff Kirsher #define EFX_ASSERT_RESET_SERIALISED(efx) \ 233874aeea5SJeff Kirsher do { \ 234f16aeea0SBen Hutchings if ((efx->state == STATE_READY) || \ 235626950dbSAlexandre Rames (efx->state == STATE_RECOVERY) || \ 236874aeea5SJeff Kirsher (efx->state == STATE_DISABLED)) \ 237874aeea5SJeff Kirsher ASSERT_RTNL(); \ 238874aeea5SJeff Kirsher } while (0) 239874aeea5SJeff Kirsher 2408b7325b4SBen Hutchings static int efx_check_disabled(struct efx_nic *efx) 2418b7325b4SBen Hutchings { 242626950dbSAlexandre Rames if (efx->state == STATE_DISABLED || efx->state == STATE_RECOVERY) { 2438b7325b4SBen Hutchings netif_err(efx, drv, efx->net_dev, 2448b7325b4SBen Hutchings "device is disabled due to earlier errors\n"); 2458b7325b4SBen Hutchings return -EIO; 2468b7325b4SBen Hutchings } 2478b7325b4SBen Hutchings return 0; 2488b7325b4SBen Hutchings } 2498b7325b4SBen Hutchings 250874aeea5SJeff Kirsher /************************************************************************** 251874aeea5SJeff Kirsher * 252874aeea5SJeff Kirsher * Event queue processing 253874aeea5SJeff Kirsher * 254874aeea5SJeff Kirsher *************************************************************************/ 255874aeea5SJeff Kirsher 256874aeea5SJeff Kirsher /* Process channel's event queue 257874aeea5SJeff Kirsher * 258874aeea5SJeff Kirsher * This function is responsible for processing the event queue of a 259874aeea5SJeff Kirsher * single channel. The caller must guarantee that this function will 260874aeea5SJeff Kirsher * never be concurrently called more than once on the same channel, 261874aeea5SJeff Kirsher * though different channels may be being processed concurrently. 262874aeea5SJeff Kirsher */ 263874aeea5SJeff Kirsher static int efx_process_channel(struct efx_channel *channel, int budget) 264874aeea5SJeff Kirsher { 265c936835cSPeter Dunning struct efx_tx_queue *tx_queue; 266874aeea5SJeff Kirsher int spent; 267874aeea5SJeff Kirsher 2689f2cb71cSBen Hutchings if (unlikely(!channel->enabled)) 269874aeea5SJeff Kirsher return 0; 270874aeea5SJeff Kirsher 271c936835cSPeter Dunning efx_for_each_channel_tx_queue(tx_queue, channel) { 272c936835cSPeter Dunning tx_queue->pkts_compl = 0; 273c936835cSPeter Dunning tx_queue->bytes_compl = 0; 274c936835cSPeter Dunning } 275c936835cSPeter Dunning 276874aeea5SJeff Kirsher spent = efx_nic_process_eventq(channel, budget); 277d9ab7007SBen Hutchings if (spent && efx_channel_has_rx_queue(channel)) { 278d9ab7007SBen Hutchings struct efx_rx_queue *rx_queue = 279d9ab7007SBen Hutchings efx_channel_get_rx_queue(channel); 280874aeea5SJeff Kirsher 281ff734ef4SBen Hutchings efx_rx_flush_packet(channel); 282cce28794SJon Cooper efx_fast_push_rx_descriptors(rx_queue, true); 283d9ab7007SBen Hutchings } 284874aeea5SJeff Kirsher 285c936835cSPeter Dunning /* Update BQL */ 286c936835cSPeter Dunning efx_for_each_channel_tx_queue(tx_queue, channel) { 287c936835cSPeter Dunning if (tx_queue->bytes_compl) { 288c936835cSPeter Dunning netdev_tx_completed_queue(tx_queue->core_txq, 289c936835cSPeter Dunning tx_queue->pkts_compl, tx_queue->bytes_compl); 290c936835cSPeter Dunning } 291c936835cSPeter Dunning } 292c936835cSPeter Dunning 293874aeea5SJeff Kirsher return spent; 294874aeea5SJeff Kirsher } 295874aeea5SJeff Kirsher 296874aeea5SJeff Kirsher /* NAPI poll handler 297874aeea5SJeff Kirsher * 298874aeea5SJeff Kirsher * NAPI guarantees serialisation of polls of the same device, which 299874aeea5SJeff Kirsher * provides the guarantee required by efx_process_channel(). 300874aeea5SJeff Kirsher */ 301539de7c5SBert Kenward static void efx_update_irq_mod(struct efx_nic *efx, struct efx_channel *channel) 302539de7c5SBert Kenward { 303539de7c5SBert Kenward int step = efx->irq_mod_step_us; 304539de7c5SBert Kenward 305539de7c5SBert Kenward if (channel->irq_mod_score < irq_adapt_low_thresh) { 306539de7c5SBert Kenward if (channel->irq_moderation_us > step) { 307539de7c5SBert Kenward channel->irq_moderation_us -= step; 308539de7c5SBert Kenward efx->type->push_irq_moderation(channel); 309539de7c5SBert Kenward } 310539de7c5SBert Kenward } else if (channel->irq_mod_score > irq_adapt_high_thresh) { 311539de7c5SBert Kenward if (channel->irq_moderation_us < 312539de7c5SBert Kenward efx->irq_rx_moderation_us) { 313539de7c5SBert Kenward channel->irq_moderation_us += step; 314539de7c5SBert Kenward efx->type->push_irq_moderation(channel); 315539de7c5SBert Kenward } 316539de7c5SBert Kenward } 317539de7c5SBert Kenward 318539de7c5SBert Kenward channel->irq_count = 0; 319539de7c5SBert Kenward channel->irq_mod_score = 0; 320539de7c5SBert Kenward } 321539de7c5SBert Kenward 322874aeea5SJeff Kirsher static int efx_poll(struct napi_struct *napi, int budget) 323874aeea5SJeff Kirsher { 324874aeea5SJeff Kirsher struct efx_channel *channel = 325874aeea5SJeff Kirsher container_of(napi, struct efx_channel, napi_str); 326874aeea5SJeff Kirsher struct efx_nic *efx = channel->efx; 327874aeea5SJeff Kirsher int spent; 328874aeea5SJeff Kirsher 329874aeea5SJeff Kirsher netif_vdbg(efx, intr, efx->net_dev, 330874aeea5SJeff Kirsher "channel %d NAPI poll executing on CPU %d\n", 331874aeea5SJeff Kirsher channel->channel, raw_smp_processor_id()); 332874aeea5SJeff Kirsher 333874aeea5SJeff Kirsher spent = efx_process_channel(channel, budget); 334874aeea5SJeff Kirsher 335874aeea5SJeff Kirsher if (spent < budget) { 3369d9a6973SBen Hutchings if (efx_channel_has_rx_queue(channel) && 337874aeea5SJeff Kirsher efx->irq_rx_adaptive && 338874aeea5SJeff Kirsher unlikely(++channel->irq_count == 1000)) { 339539de7c5SBert Kenward efx_update_irq_mod(efx, channel); 340874aeea5SJeff Kirsher } 341874aeea5SJeff Kirsher 342874aeea5SJeff Kirsher efx_filter_rfs_expire(channel); 343874aeea5SJeff Kirsher 344874aeea5SJeff Kirsher /* There is no race here; although napi_disable() will 345874aeea5SJeff Kirsher * only wait for napi_complete(), this isn't a problem 346514bedbcSBen Hutchings * since efx_nic_eventq_read_ack() will have no effect if 347874aeea5SJeff Kirsher * interrupts have already been disabled. 348874aeea5SJeff Kirsher */ 349f820c0acSBert Kenward if (napi_complete_done(napi, spent)) 350514bedbcSBen Hutchings efx_nic_eventq_read_ack(channel); 351874aeea5SJeff Kirsher } 352874aeea5SJeff Kirsher 353874aeea5SJeff Kirsher return spent; 354874aeea5SJeff Kirsher } 355874aeea5SJeff Kirsher 356874aeea5SJeff Kirsher /* Create event queue 357874aeea5SJeff Kirsher * Event queue memory allocations are done only once. If the channel 358874aeea5SJeff Kirsher * is reset, the memory buffer will be reused; this guards against 359874aeea5SJeff Kirsher * errors during channel reset and also simplifies interrupt handling. 360874aeea5SJeff Kirsher */ 361874aeea5SJeff Kirsher static int efx_probe_eventq(struct efx_channel *channel) 362874aeea5SJeff Kirsher { 363874aeea5SJeff Kirsher struct efx_nic *efx = channel->efx; 364874aeea5SJeff Kirsher unsigned long entries; 365874aeea5SJeff Kirsher 36686ee5302SBen Hutchings netif_dbg(efx, probe, efx->net_dev, 367874aeea5SJeff Kirsher "chan %d create event queue\n", channel->channel); 368874aeea5SJeff Kirsher 369874aeea5SJeff Kirsher /* Build an event queue with room for one event per tx and rx buffer, 370874aeea5SJeff Kirsher * plus some extra for link state events and MCDI completions. */ 371874aeea5SJeff Kirsher entries = roundup_pow_of_two(efx->rxq_entries + efx->txq_entries + 128); 372e01b16a7SEdward Cree EFX_WARN_ON_PARANOID(entries > EFX_MAX_EVQ_SIZE); 373874aeea5SJeff Kirsher channel->eventq_mask = max(entries, EFX_MIN_EVQ_SIZE) - 1; 374874aeea5SJeff Kirsher 375874aeea5SJeff Kirsher return efx_nic_probe_eventq(channel); 376874aeea5SJeff Kirsher } 377874aeea5SJeff Kirsher 378874aeea5SJeff Kirsher /* Prepare channel's event queue */ 379261e4d96SJon Cooper static int efx_init_eventq(struct efx_channel *channel) 380874aeea5SJeff Kirsher { 38115acb1ceSBen Hutchings struct efx_nic *efx = channel->efx; 382261e4d96SJon Cooper int rc; 383261e4d96SJon Cooper 384261e4d96SJon Cooper EFX_WARN_ON_PARANOID(channel->eventq_init); 385261e4d96SJon Cooper 38615acb1ceSBen Hutchings netif_dbg(efx, drv, efx->net_dev, 387874aeea5SJeff Kirsher "chan %d init event queue\n", channel->channel); 388874aeea5SJeff Kirsher 389261e4d96SJon Cooper rc = efx_nic_init_eventq(channel); 390261e4d96SJon Cooper if (rc == 0) { 39115acb1ceSBen Hutchings efx->type->push_irq_moderation(channel); 392874aeea5SJeff Kirsher channel->eventq_read_ptr = 0; 393be3fc09cSBen Hutchings channel->eventq_init = true; 394874aeea5SJeff Kirsher } 395261e4d96SJon Cooper return rc; 396261e4d96SJon Cooper } 397874aeea5SJeff Kirsher 3989f2cb71cSBen Hutchings /* Enable event queue processing and NAPI */ 39936763266SAlexandre Rames void efx_start_eventq(struct efx_channel *channel) 4009f2cb71cSBen Hutchings { 4019f2cb71cSBen Hutchings netif_dbg(channel->efx, ifup, channel->efx->net_dev, 4029f2cb71cSBen Hutchings "chan %d start event queue\n", channel->channel); 4039f2cb71cSBen Hutchings 404514bedbcSBen Hutchings /* Make sure the NAPI handler sees the enabled flag set */ 4059f2cb71cSBen Hutchings channel->enabled = true; 4069f2cb71cSBen Hutchings smp_wmb(); 4079f2cb71cSBen Hutchings 4089f2cb71cSBen Hutchings napi_enable(&channel->napi_str); 4099f2cb71cSBen Hutchings efx_nic_eventq_read_ack(channel); 4109f2cb71cSBen Hutchings } 4119f2cb71cSBen Hutchings 4129f2cb71cSBen Hutchings /* Disable event queue processing and NAPI */ 41336763266SAlexandre Rames void efx_stop_eventq(struct efx_channel *channel) 4149f2cb71cSBen Hutchings { 4159f2cb71cSBen Hutchings if (!channel->enabled) 4169f2cb71cSBen Hutchings return; 4179f2cb71cSBen Hutchings 4189f2cb71cSBen Hutchings napi_disable(&channel->napi_str); 4199f2cb71cSBen Hutchings channel->enabled = false; 4209f2cb71cSBen Hutchings } 4219f2cb71cSBen Hutchings 422874aeea5SJeff Kirsher static void efx_fini_eventq(struct efx_channel *channel) 423874aeea5SJeff Kirsher { 424be3fc09cSBen Hutchings if (!channel->eventq_init) 425be3fc09cSBen Hutchings return; 426be3fc09cSBen Hutchings 427874aeea5SJeff Kirsher netif_dbg(channel->efx, drv, channel->efx->net_dev, 428874aeea5SJeff Kirsher "chan %d fini event queue\n", channel->channel); 429874aeea5SJeff Kirsher 430874aeea5SJeff Kirsher efx_nic_fini_eventq(channel); 431be3fc09cSBen Hutchings channel->eventq_init = false; 432874aeea5SJeff Kirsher } 433874aeea5SJeff Kirsher 434874aeea5SJeff Kirsher static void efx_remove_eventq(struct efx_channel *channel) 435874aeea5SJeff Kirsher { 436874aeea5SJeff Kirsher netif_dbg(channel->efx, drv, channel->efx->net_dev, 437874aeea5SJeff Kirsher "chan %d remove event queue\n", channel->channel); 438874aeea5SJeff Kirsher 439874aeea5SJeff Kirsher efx_nic_remove_eventq(channel); 440874aeea5SJeff Kirsher } 441874aeea5SJeff Kirsher 442874aeea5SJeff Kirsher /************************************************************************** 443874aeea5SJeff Kirsher * 444874aeea5SJeff Kirsher * Channel handling 445874aeea5SJeff Kirsher * 446874aeea5SJeff Kirsher *************************************************************************/ 447874aeea5SJeff Kirsher 4487f967c01SBen Hutchings /* Allocate and initialise a channel structure. */ 449874aeea5SJeff Kirsher static struct efx_channel * 450874aeea5SJeff Kirsher efx_alloc_channel(struct efx_nic *efx, int i, struct efx_channel *old_channel) 451874aeea5SJeff Kirsher { 452874aeea5SJeff Kirsher struct efx_channel *channel; 453874aeea5SJeff Kirsher struct efx_rx_queue *rx_queue; 454874aeea5SJeff Kirsher struct efx_tx_queue *tx_queue; 455874aeea5SJeff Kirsher int j; 456874aeea5SJeff Kirsher 4577f967c01SBen Hutchings channel = kzalloc(sizeof(*channel), GFP_KERNEL); 4587f967c01SBen Hutchings if (!channel) 4597f967c01SBen Hutchings return NULL; 4607f967c01SBen Hutchings 4617f967c01SBen Hutchings channel->efx = efx; 4627f967c01SBen Hutchings channel->channel = i; 4637f967c01SBen Hutchings channel->type = &efx_default_channel_type; 4647f967c01SBen Hutchings 4657f967c01SBen Hutchings for (j = 0; j < EFX_TXQ_TYPES; j++) { 4667f967c01SBen Hutchings tx_queue = &channel->tx_queue[j]; 4677f967c01SBen Hutchings tx_queue->efx = efx; 4687f967c01SBen Hutchings tx_queue->queue = i * EFX_TXQ_TYPES + j; 4697f967c01SBen Hutchings tx_queue->channel = channel; 4707f967c01SBen Hutchings } 4717f967c01SBen Hutchings 4727f967c01SBen Hutchings rx_queue = &channel->rx_queue; 4737f967c01SBen Hutchings rx_queue->efx = efx; 4747f967c01SBen Hutchings setup_timer(&rx_queue->slow_fill, efx_rx_slow_fill, 4757f967c01SBen Hutchings (unsigned long)rx_queue); 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)); 514874aeea5SJeff Kirsher setup_timer(&rx_queue->slow_fill, efx_rx_slow_fill, 515874aeea5SJeff Kirsher (unsigned long)rx_queue); 516874aeea5SJeff Kirsher 517874aeea5SJeff Kirsher return channel; 518874aeea5SJeff Kirsher } 519874aeea5SJeff Kirsher 520874aeea5SJeff Kirsher static int efx_probe_channel(struct efx_channel *channel) 521874aeea5SJeff Kirsher { 522874aeea5SJeff Kirsher struct efx_tx_queue *tx_queue; 523874aeea5SJeff Kirsher struct efx_rx_queue *rx_queue; 524874aeea5SJeff Kirsher int rc; 525874aeea5SJeff Kirsher 526874aeea5SJeff Kirsher netif_dbg(channel->efx, probe, channel->efx->net_dev, 527874aeea5SJeff Kirsher "creating channel %d\n", channel->channel); 528874aeea5SJeff Kirsher 5297f967c01SBen Hutchings rc = channel->type->pre_probe(channel); 5307f967c01SBen Hutchings if (rc) 5317f967c01SBen Hutchings goto fail; 5327f967c01SBen Hutchings 533874aeea5SJeff Kirsher rc = efx_probe_eventq(channel); 534874aeea5SJeff Kirsher if (rc) 5357f967c01SBen Hutchings goto fail; 536874aeea5SJeff Kirsher 537874aeea5SJeff Kirsher efx_for_each_channel_tx_queue(tx_queue, channel) { 538874aeea5SJeff Kirsher rc = efx_probe_tx_queue(tx_queue); 539874aeea5SJeff Kirsher if (rc) 5407f967c01SBen Hutchings goto fail; 541874aeea5SJeff Kirsher } 542874aeea5SJeff Kirsher 543874aeea5SJeff Kirsher efx_for_each_channel_rx_queue(rx_queue, channel) { 544874aeea5SJeff Kirsher rc = efx_probe_rx_queue(rx_queue); 545874aeea5SJeff Kirsher if (rc) 5467f967c01SBen Hutchings goto fail; 547874aeea5SJeff Kirsher } 548874aeea5SJeff Kirsher 549874aeea5SJeff Kirsher return 0; 550874aeea5SJeff Kirsher 5517f967c01SBen Hutchings fail: 5527f967c01SBen Hutchings efx_remove_channel(channel); 553874aeea5SJeff Kirsher return rc; 554874aeea5SJeff Kirsher } 555874aeea5SJeff Kirsher 5567f967c01SBen Hutchings static void 5577f967c01SBen Hutchings efx_get_channel_name(struct efx_channel *channel, char *buf, size_t len) 5587f967c01SBen Hutchings { 5597f967c01SBen Hutchings struct efx_nic *efx = channel->efx; 5607f967c01SBen Hutchings const char *type; 5617f967c01SBen Hutchings int number; 5627f967c01SBen Hutchings 5637f967c01SBen Hutchings number = channel->channel; 5647f967c01SBen Hutchings if (efx->tx_channel_offset == 0) { 5657f967c01SBen Hutchings type = ""; 5667f967c01SBen Hutchings } else if (channel->channel < efx->tx_channel_offset) { 5677f967c01SBen Hutchings type = "-rx"; 5687f967c01SBen Hutchings } else { 5697f967c01SBen Hutchings type = "-tx"; 5707f967c01SBen Hutchings number -= efx->tx_channel_offset; 5717f967c01SBen Hutchings } 5727f967c01SBen Hutchings snprintf(buf, len, "%s%s-%d", efx->name, type, number); 5737f967c01SBen Hutchings } 574874aeea5SJeff Kirsher 575874aeea5SJeff Kirsher static void efx_set_channel_names(struct efx_nic *efx) 576874aeea5SJeff Kirsher { 577874aeea5SJeff Kirsher struct efx_channel *channel; 578874aeea5SJeff Kirsher 5797f967c01SBen Hutchings efx_for_each_channel(channel, efx) 5807f967c01SBen Hutchings channel->type->get_name(channel, 581d8291187SBen Hutchings efx->msi_context[channel->channel].name, 582d8291187SBen Hutchings sizeof(efx->msi_context[0].name)); 583874aeea5SJeff Kirsher } 584874aeea5SJeff Kirsher 585874aeea5SJeff Kirsher static int efx_probe_channels(struct efx_nic *efx) 586874aeea5SJeff Kirsher { 587874aeea5SJeff Kirsher struct efx_channel *channel; 588874aeea5SJeff Kirsher int rc; 589874aeea5SJeff Kirsher 590874aeea5SJeff Kirsher /* Restart special buffer allocation */ 591874aeea5SJeff Kirsher efx->next_buffer_table = 0; 592874aeea5SJeff Kirsher 593c92aaff1SBen Hutchings /* Probe channels in reverse, so that any 'extra' channels 594c92aaff1SBen Hutchings * use the start of the buffer table. This allows the traffic 595c92aaff1SBen Hutchings * channels to be resized without moving them or wasting the 596c92aaff1SBen Hutchings * entries before them. 597c92aaff1SBen Hutchings */ 598c92aaff1SBen Hutchings efx_for_each_channel_rev(channel, efx) { 599874aeea5SJeff Kirsher rc = efx_probe_channel(channel); 600874aeea5SJeff Kirsher if (rc) { 601874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 602874aeea5SJeff Kirsher "failed to create channel %d\n", 603874aeea5SJeff Kirsher channel->channel); 604874aeea5SJeff Kirsher goto fail; 605874aeea5SJeff Kirsher } 606874aeea5SJeff Kirsher } 607874aeea5SJeff Kirsher efx_set_channel_names(efx); 608874aeea5SJeff Kirsher 609874aeea5SJeff Kirsher return 0; 610874aeea5SJeff Kirsher 611874aeea5SJeff Kirsher fail: 612874aeea5SJeff Kirsher efx_remove_channels(efx); 613874aeea5SJeff Kirsher return rc; 614874aeea5SJeff Kirsher } 615874aeea5SJeff Kirsher 616874aeea5SJeff Kirsher /* Channels are shutdown and reinitialised whilst the NIC is running 617874aeea5SJeff Kirsher * to propagate configuration changes (mtu, checksum offload), or 618874aeea5SJeff Kirsher * to clear hardware error conditions 619874aeea5SJeff Kirsher */ 6209f2cb71cSBen Hutchings static void efx_start_datapath(struct efx_nic *efx) 621874aeea5SJeff Kirsher { 622ebfcd0fdSAndrew Rybchenko netdev_features_t old_features = efx->net_dev->features; 62385740cdfSBen Hutchings bool old_rx_scatter = efx->rx_scatter; 624874aeea5SJeff Kirsher struct efx_tx_queue *tx_queue; 625874aeea5SJeff Kirsher struct efx_rx_queue *rx_queue; 626874aeea5SJeff Kirsher struct efx_channel *channel; 62785740cdfSBen Hutchings size_t rx_buf_len; 628874aeea5SJeff Kirsher 629874aeea5SJeff Kirsher /* Calculate the rx buffer allocation parameters required to 630874aeea5SJeff Kirsher * support the current MTU, including padding for header 631874aeea5SJeff Kirsher * alignment and overruns. 632874aeea5SJeff Kirsher */ 63343a3739dSJon Cooper efx->rx_dma_len = (efx->rx_prefix_size + 634874aeea5SJeff Kirsher EFX_MAX_FRAME_LEN(efx->net_dev->mtu) + 635874aeea5SJeff Kirsher efx->type->rx_buffer_padding); 63685740cdfSBen Hutchings rx_buf_len = (sizeof(struct efx_rx_page_state) + 6372ec03014SAndrew Rybchenko efx->rx_ip_align + efx->rx_dma_len); 63885740cdfSBen Hutchings if (rx_buf_len <= PAGE_SIZE) { 639e8c68c0aSJon Cooper efx->rx_scatter = efx->type->always_rx_scatter; 64085740cdfSBen Hutchings efx->rx_buffer_order = 0; 64185740cdfSBen Hutchings } else if (efx->type->can_rx_scatter) { 642950c54dfSBen Hutchings BUILD_BUG_ON(EFX_RX_USR_BUF_SIZE % L1_CACHE_BYTES); 64385740cdfSBen Hutchings BUILD_BUG_ON(sizeof(struct efx_rx_page_state) + 644950c54dfSBen Hutchings 2 * ALIGN(NET_IP_ALIGN + EFX_RX_USR_BUF_SIZE, 645950c54dfSBen Hutchings EFX_RX_BUF_ALIGNMENT) > 646950c54dfSBen Hutchings PAGE_SIZE); 64785740cdfSBen Hutchings efx->rx_scatter = true; 64885740cdfSBen Hutchings efx->rx_dma_len = EFX_RX_USR_BUF_SIZE; 64985740cdfSBen Hutchings efx->rx_buffer_order = 0; 65085740cdfSBen Hutchings } else { 65185740cdfSBen Hutchings efx->rx_scatter = false; 65285740cdfSBen Hutchings efx->rx_buffer_order = get_order(rx_buf_len); 65385740cdfSBen Hutchings } 65485740cdfSBen Hutchings 6551648a23fSDaniel Pieczko efx_rx_config_page_split(efx); 6561648a23fSDaniel Pieczko if (efx->rx_buffer_order) 6571648a23fSDaniel Pieczko netif_dbg(efx, drv, efx->net_dev, 6581648a23fSDaniel Pieczko "RX buf len=%u; page order=%u batch=%u\n", 6591648a23fSDaniel Pieczko efx->rx_dma_len, efx->rx_buffer_order, 6601648a23fSDaniel Pieczko efx->rx_pages_per_batch); 6611648a23fSDaniel Pieczko else 6621648a23fSDaniel Pieczko netif_dbg(efx, drv, efx->net_dev, 6631648a23fSDaniel Pieczko "RX buf len=%u step=%u bpp=%u; page batch=%u\n", 6641648a23fSDaniel Pieczko efx->rx_dma_len, efx->rx_page_buf_step, 6651648a23fSDaniel Pieczko efx->rx_bufs_per_page, efx->rx_pages_per_batch); 6662768935aSDaniel Pieczko 667ebfcd0fdSAndrew Rybchenko /* Restore previously fixed features in hw_features and remove 668ebfcd0fdSAndrew Rybchenko * features which are fixed now 669ebfcd0fdSAndrew Rybchenko */ 670ebfcd0fdSAndrew Rybchenko efx->net_dev->hw_features |= efx->net_dev->features; 671ebfcd0fdSAndrew Rybchenko efx->net_dev->hw_features &= ~efx->fixed_features; 672ebfcd0fdSAndrew Rybchenko efx->net_dev->features |= efx->fixed_features; 673ebfcd0fdSAndrew Rybchenko if (efx->net_dev->features != old_features) 674ebfcd0fdSAndrew Rybchenko netdev_features_change(efx->net_dev); 675ebfcd0fdSAndrew Rybchenko 676e8c68c0aSJon Cooper /* RX filters may also have scatter-enabled flags */ 67785740cdfSBen Hutchings if (efx->rx_scatter != old_rx_scatter) 678add72477SBen Hutchings efx->type->filter_update_rx_scatter(efx); 679874aeea5SJeff Kirsher 68014bf718fSBen Hutchings /* We must keep at least one descriptor in a TX ring empty. 68114bf718fSBen Hutchings * We could avoid this when the queue size does not exactly 68214bf718fSBen Hutchings * match the hardware ring size, but it's not that important. 68314bf718fSBen Hutchings * Therefore we stop the queue when one more skb might fill 68414bf718fSBen Hutchings * the ring completely. We wake it when half way back to 68514bf718fSBen Hutchings * empty. 68614bf718fSBen Hutchings */ 68714bf718fSBen Hutchings efx->txq_stop_thresh = efx->txq_entries - efx_tx_max_skb_descs(efx); 68814bf718fSBen Hutchings efx->txq_wake_thresh = efx->txq_stop_thresh / 2; 68914bf718fSBen Hutchings 690874aeea5SJeff Kirsher /* Initialise the channels */ 691874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) { 6923881d8abSAlexandre Rames efx_for_each_channel_tx_queue(tx_queue, channel) { 693874aeea5SJeff Kirsher efx_init_tx_queue(tx_queue); 6943881d8abSAlexandre Rames atomic_inc(&efx->active_queues); 6953881d8abSAlexandre Rames } 696874aeea5SJeff Kirsher 6979f2cb71cSBen Hutchings efx_for_each_channel_rx_queue(rx_queue, channel) { 698874aeea5SJeff Kirsher efx_init_rx_queue(rx_queue); 6993881d8abSAlexandre Rames atomic_inc(&efx->active_queues); 700cce28794SJon Cooper efx_stop_eventq(channel); 701cce28794SJon Cooper efx_fast_push_rx_descriptors(rx_queue, false); 702cce28794SJon Cooper efx_start_eventq(channel); 7039f2cb71cSBen Hutchings } 704874aeea5SJeff Kirsher 70585740cdfSBen Hutchings WARN_ON(channel->rx_pkt_n_frags); 706874aeea5SJeff Kirsher } 7079f2cb71cSBen Hutchings 7082ea4dc28SAlexandre Rames efx_ptp_start_datapath(efx); 7092ea4dc28SAlexandre Rames 7109f2cb71cSBen Hutchings if (netif_device_present(efx->net_dev)) 7119f2cb71cSBen Hutchings netif_tx_wake_all_queues(efx->net_dev); 712874aeea5SJeff Kirsher } 713874aeea5SJeff Kirsher 7149f2cb71cSBen Hutchings static void efx_stop_datapath(struct efx_nic *efx) 715874aeea5SJeff Kirsher { 716874aeea5SJeff Kirsher struct efx_channel *channel; 717874aeea5SJeff Kirsher struct efx_tx_queue *tx_queue; 718874aeea5SJeff Kirsher struct efx_rx_queue *rx_queue; 719874aeea5SJeff Kirsher int rc; 720874aeea5SJeff Kirsher 721874aeea5SJeff Kirsher EFX_ASSERT_RESET_SERIALISED(efx); 722874aeea5SJeff Kirsher BUG_ON(efx->port_enabled); 723874aeea5SJeff Kirsher 7242ea4dc28SAlexandre Rames efx_ptp_stop_datapath(efx); 7252ea4dc28SAlexandre Rames 726d8aec745SBen Hutchings /* Stop RX refill */ 727d8aec745SBen Hutchings efx_for_each_channel(channel, efx) { 728d8aec745SBen Hutchings efx_for_each_channel_rx_queue(rx_queue, channel) 729d8aec745SBen Hutchings rx_queue->refill_enabled = false; 730d8aec745SBen Hutchings } 731d8aec745SBen Hutchings 732874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) { 7339f2cb71cSBen Hutchings /* RX packet processing is pipelined, so wait for the 7349f2cb71cSBen Hutchings * NAPI handler to complete. At least event queue 0 7359f2cb71cSBen Hutchings * might be kept active by non-data events, so don't 7369f2cb71cSBen Hutchings * use napi_synchronize() but actually disable NAPI 7379f2cb71cSBen Hutchings * temporarily. 7389f2cb71cSBen Hutchings */ 7399f2cb71cSBen Hutchings if (efx_channel_has_rx_queue(channel)) { 7409f2cb71cSBen Hutchings efx_stop_eventq(channel); 7419f2cb71cSBen Hutchings efx_start_eventq(channel); 7429f2cb71cSBen Hutchings } 743e42c3d85SBen Hutchings } 744874aeea5SJeff Kirsher 745e42c3d85SBen Hutchings rc = efx->type->fini_dmaq(efx); 7465a6681e2SEdward Cree if (rc) { 747e42c3d85SBen Hutchings netif_err(efx, drv, efx->net_dev, "failed to flush queues\n"); 748e42c3d85SBen Hutchings } else { 749e42c3d85SBen Hutchings netif_dbg(efx, drv, efx->net_dev, 750e42c3d85SBen Hutchings "successfully flushed all queues\n"); 751e42c3d85SBen Hutchings } 752e42c3d85SBen Hutchings 753e42c3d85SBen Hutchings efx_for_each_channel(channel, efx) { 754874aeea5SJeff Kirsher efx_for_each_channel_rx_queue(rx_queue, channel) 755874aeea5SJeff Kirsher efx_fini_rx_queue(rx_queue); 756874aeea5SJeff Kirsher efx_for_each_possible_channel_tx_queue(tx_queue, channel) 757874aeea5SJeff Kirsher efx_fini_tx_queue(tx_queue); 758874aeea5SJeff Kirsher } 759874aeea5SJeff Kirsher } 760874aeea5SJeff Kirsher 761874aeea5SJeff Kirsher static void efx_remove_channel(struct efx_channel *channel) 762874aeea5SJeff Kirsher { 763874aeea5SJeff Kirsher struct efx_tx_queue *tx_queue; 764874aeea5SJeff Kirsher struct efx_rx_queue *rx_queue; 765874aeea5SJeff Kirsher 766874aeea5SJeff Kirsher netif_dbg(channel->efx, drv, channel->efx->net_dev, 767874aeea5SJeff Kirsher "destroy chan %d\n", channel->channel); 768874aeea5SJeff Kirsher 769874aeea5SJeff Kirsher efx_for_each_channel_rx_queue(rx_queue, channel) 770874aeea5SJeff Kirsher efx_remove_rx_queue(rx_queue); 771874aeea5SJeff Kirsher efx_for_each_possible_channel_tx_queue(tx_queue, channel) 772874aeea5SJeff Kirsher efx_remove_tx_queue(tx_queue); 773874aeea5SJeff Kirsher efx_remove_eventq(channel); 774c31e5f9fSStuart Hodgson channel->type->post_remove(channel); 775874aeea5SJeff Kirsher } 776874aeea5SJeff Kirsher 777874aeea5SJeff Kirsher static void efx_remove_channels(struct efx_nic *efx) 778874aeea5SJeff Kirsher { 779874aeea5SJeff Kirsher struct efx_channel *channel; 780874aeea5SJeff Kirsher 781874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) 782874aeea5SJeff Kirsher efx_remove_channel(channel); 783874aeea5SJeff Kirsher } 784874aeea5SJeff Kirsher 785874aeea5SJeff Kirsher int 786874aeea5SJeff Kirsher efx_realloc_channels(struct efx_nic *efx, u32 rxq_entries, u32 txq_entries) 787874aeea5SJeff Kirsher { 788874aeea5SJeff Kirsher struct efx_channel *other_channel[EFX_MAX_CHANNELS], *channel; 789874aeea5SJeff Kirsher u32 old_rxq_entries, old_txq_entries; 7907f967c01SBen Hutchings unsigned i, next_buffer_table = 0; 791261e4d96SJon Cooper int rc, rc2; 7928b7325b4SBen Hutchings 7938b7325b4SBen Hutchings rc = efx_check_disabled(efx); 7948b7325b4SBen Hutchings if (rc) 7958b7325b4SBen Hutchings return rc; 7967f967c01SBen Hutchings 7977f967c01SBen Hutchings /* Not all channels should be reallocated. We must avoid 7987f967c01SBen Hutchings * reallocating their buffer table entries. 7997f967c01SBen Hutchings */ 8007f967c01SBen Hutchings efx_for_each_channel(channel, efx) { 8017f967c01SBen Hutchings struct efx_rx_queue *rx_queue; 8027f967c01SBen Hutchings struct efx_tx_queue *tx_queue; 8037f967c01SBen Hutchings 8047f967c01SBen Hutchings if (channel->type->copy) 8057f967c01SBen Hutchings continue; 8067f967c01SBen Hutchings next_buffer_table = max(next_buffer_table, 8077f967c01SBen Hutchings channel->eventq.index + 8087f967c01SBen Hutchings channel->eventq.entries); 8097f967c01SBen Hutchings efx_for_each_channel_rx_queue(rx_queue, channel) 8107f967c01SBen Hutchings next_buffer_table = max(next_buffer_table, 8117f967c01SBen Hutchings rx_queue->rxd.index + 8127f967c01SBen Hutchings rx_queue->rxd.entries); 8137f967c01SBen Hutchings efx_for_each_channel_tx_queue(tx_queue, channel) 8147f967c01SBen Hutchings next_buffer_table = max(next_buffer_table, 8157f967c01SBen Hutchings tx_queue->txd.index + 8167f967c01SBen Hutchings tx_queue->txd.entries); 8177f967c01SBen Hutchings } 818874aeea5SJeff Kirsher 81929c69a48SBen Hutchings efx_device_detach_sync(efx); 820874aeea5SJeff Kirsher efx_stop_all(efx); 821d8291187SBen Hutchings efx_soft_disable_interrupts(efx); 822874aeea5SJeff Kirsher 8237f967c01SBen Hutchings /* Clone channels (where possible) */ 824874aeea5SJeff Kirsher memset(other_channel, 0, sizeof(other_channel)); 825874aeea5SJeff Kirsher for (i = 0; i < efx->n_channels; i++) { 8267f967c01SBen Hutchings channel = efx->channel[i]; 8277f967c01SBen Hutchings if (channel->type->copy) 8287f967c01SBen Hutchings channel = channel->type->copy(channel); 829874aeea5SJeff Kirsher if (!channel) { 830874aeea5SJeff Kirsher rc = -ENOMEM; 831874aeea5SJeff Kirsher goto out; 832874aeea5SJeff Kirsher } 833874aeea5SJeff Kirsher other_channel[i] = channel; 834874aeea5SJeff Kirsher } 835874aeea5SJeff Kirsher 836874aeea5SJeff Kirsher /* Swap entry counts and channel pointers */ 837874aeea5SJeff Kirsher old_rxq_entries = efx->rxq_entries; 838874aeea5SJeff Kirsher old_txq_entries = efx->txq_entries; 839874aeea5SJeff Kirsher efx->rxq_entries = rxq_entries; 840874aeea5SJeff Kirsher efx->txq_entries = txq_entries; 841874aeea5SJeff Kirsher for (i = 0; i < efx->n_channels; i++) { 842874aeea5SJeff Kirsher channel = efx->channel[i]; 843874aeea5SJeff Kirsher efx->channel[i] = other_channel[i]; 844874aeea5SJeff Kirsher other_channel[i] = channel; 845874aeea5SJeff Kirsher } 846874aeea5SJeff Kirsher 8477f967c01SBen Hutchings /* Restart buffer table allocation */ 8487f967c01SBen Hutchings efx->next_buffer_table = next_buffer_table; 8497f967c01SBen Hutchings 8507f967c01SBen Hutchings for (i = 0; i < efx->n_channels; i++) { 8517f967c01SBen Hutchings channel = efx->channel[i]; 8527f967c01SBen Hutchings if (!channel->type->copy) 8537f967c01SBen Hutchings continue; 8547f967c01SBen Hutchings rc = efx_probe_channel(channel); 855874aeea5SJeff Kirsher if (rc) 856874aeea5SJeff Kirsher goto rollback; 8577f967c01SBen Hutchings efx_init_napi_channel(efx->channel[i]); 858874aeea5SJeff Kirsher } 859874aeea5SJeff Kirsher 8607f967c01SBen Hutchings out: 8617f967c01SBen Hutchings /* Destroy unused channel structures */ 8627f967c01SBen Hutchings for (i = 0; i < efx->n_channels; i++) { 8637f967c01SBen Hutchings channel = other_channel[i]; 8647f967c01SBen Hutchings if (channel && channel->type->copy) { 8657f967c01SBen Hutchings efx_fini_napi_channel(channel); 8667f967c01SBen Hutchings efx_remove_channel(channel); 8677f967c01SBen Hutchings kfree(channel); 8687f967c01SBen Hutchings } 8697f967c01SBen Hutchings } 8707f967c01SBen Hutchings 871261e4d96SJon Cooper rc2 = efx_soft_enable_interrupts(efx); 872261e4d96SJon Cooper if (rc2) { 873261e4d96SJon Cooper rc = rc ? rc : rc2; 874261e4d96SJon Cooper netif_err(efx, drv, efx->net_dev, 875261e4d96SJon Cooper "unable to restart interrupts on channel reallocation\n"); 876261e4d96SJon Cooper efx_schedule_reset(efx, RESET_TYPE_DISABLE); 877261e4d96SJon Cooper } else { 878874aeea5SJeff Kirsher efx_start_all(efx); 8799c568fd8SPeter Dunning efx_device_attach_if_not_resetting(efx); 880261e4d96SJon Cooper } 881874aeea5SJeff Kirsher return rc; 882874aeea5SJeff Kirsher 883874aeea5SJeff Kirsher rollback: 884874aeea5SJeff Kirsher /* Swap back */ 885874aeea5SJeff Kirsher efx->rxq_entries = old_rxq_entries; 886874aeea5SJeff Kirsher efx->txq_entries = old_txq_entries; 887874aeea5SJeff Kirsher for (i = 0; i < efx->n_channels; i++) { 888874aeea5SJeff Kirsher channel = efx->channel[i]; 889874aeea5SJeff Kirsher efx->channel[i] = other_channel[i]; 890874aeea5SJeff Kirsher other_channel[i] = channel; 891874aeea5SJeff Kirsher } 892874aeea5SJeff Kirsher goto out; 893874aeea5SJeff Kirsher } 894874aeea5SJeff Kirsher 895874aeea5SJeff Kirsher void efx_schedule_slow_fill(struct efx_rx_queue *rx_queue) 896874aeea5SJeff Kirsher { 897874aeea5SJeff Kirsher mod_timer(&rx_queue->slow_fill, jiffies + msecs_to_jiffies(100)); 898874aeea5SJeff Kirsher } 899874aeea5SJeff Kirsher 9007f967c01SBen Hutchings static const struct efx_channel_type efx_default_channel_type = { 9017f967c01SBen Hutchings .pre_probe = efx_channel_dummy_op_int, 902c31e5f9fSStuart Hodgson .post_remove = efx_channel_dummy_op_void, 9037f967c01SBen Hutchings .get_name = efx_get_channel_name, 9047f967c01SBen Hutchings .copy = efx_copy_channel, 9057f967c01SBen Hutchings .keep_eventq = false, 9067f967c01SBen Hutchings }; 9077f967c01SBen Hutchings 9087f967c01SBen Hutchings int efx_channel_dummy_op_int(struct efx_channel *channel) 9097f967c01SBen Hutchings { 9107f967c01SBen Hutchings return 0; 9117f967c01SBen Hutchings } 9127f967c01SBen Hutchings 913c31e5f9fSStuart Hodgson void efx_channel_dummy_op_void(struct efx_channel *channel) 914c31e5f9fSStuart Hodgson { 915c31e5f9fSStuart Hodgson } 916c31e5f9fSStuart Hodgson 917874aeea5SJeff Kirsher /************************************************************************** 918874aeea5SJeff Kirsher * 919874aeea5SJeff Kirsher * Port handling 920874aeea5SJeff Kirsher * 921874aeea5SJeff Kirsher **************************************************************************/ 922874aeea5SJeff Kirsher 923874aeea5SJeff Kirsher /* This ensures that the kernel is kept informed (via 924874aeea5SJeff Kirsher * netif_carrier_on/off) of the link status, and also maintains the 925874aeea5SJeff Kirsher * link status's stop on the port's TX queue. 926874aeea5SJeff Kirsher */ 927874aeea5SJeff Kirsher void efx_link_status_changed(struct efx_nic *efx) 928874aeea5SJeff Kirsher { 929874aeea5SJeff Kirsher struct efx_link_state *link_state = &efx->link_state; 930874aeea5SJeff Kirsher 931874aeea5SJeff Kirsher /* SFC Bug 5356: A net_dev notifier is registered, so we must ensure 932874aeea5SJeff Kirsher * that no events are triggered between unregister_netdev() and the 933874aeea5SJeff Kirsher * driver unloading. A more general condition is that NETDEV_CHANGE 934874aeea5SJeff Kirsher * can only be generated between NETDEV_UP and NETDEV_DOWN */ 935874aeea5SJeff Kirsher if (!netif_running(efx->net_dev)) 936874aeea5SJeff Kirsher return; 937874aeea5SJeff Kirsher 938874aeea5SJeff Kirsher if (link_state->up != netif_carrier_ok(efx->net_dev)) { 939874aeea5SJeff Kirsher efx->n_link_state_changes++; 940874aeea5SJeff Kirsher 941874aeea5SJeff Kirsher if (link_state->up) 942874aeea5SJeff Kirsher netif_carrier_on(efx->net_dev); 943874aeea5SJeff Kirsher else 944874aeea5SJeff Kirsher netif_carrier_off(efx->net_dev); 945874aeea5SJeff Kirsher } 946874aeea5SJeff Kirsher 947874aeea5SJeff Kirsher /* Status message for kernel log */ 9482aa9ef11SBen Hutchings if (link_state->up) 949874aeea5SJeff Kirsher netif_info(efx, link, efx->net_dev, 950964e6135SBen Hutchings "link up at %uMbps %s-duplex (MTU %d)\n", 951874aeea5SJeff Kirsher link_state->speed, link_state->fd ? "full" : "half", 952964e6135SBen Hutchings efx->net_dev->mtu); 9532aa9ef11SBen Hutchings else 954874aeea5SJeff Kirsher netif_info(efx, link, efx->net_dev, "link down\n"); 955874aeea5SJeff Kirsher } 956874aeea5SJeff Kirsher 957874aeea5SJeff Kirsher void efx_link_set_advertising(struct efx_nic *efx, u32 advertising) 958874aeea5SJeff Kirsher { 959874aeea5SJeff Kirsher efx->link_advertising = advertising; 960874aeea5SJeff Kirsher if (advertising) { 961874aeea5SJeff Kirsher if (advertising & ADVERTISED_Pause) 962874aeea5SJeff Kirsher efx->wanted_fc |= (EFX_FC_TX | EFX_FC_RX); 963874aeea5SJeff Kirsher else 964874aeea5SJeff Kirsher efx->wanted_fc &= ~(EFX_FC_TX | EFX_FC_RX); 965874aeea5SJeff Kirsher if (advertising & ADVERTISED_Asym_Pause) 966874aeea5SJeff Kirsher efx->wanted_fc ^= EFX_FC_TX; 967874aeea5SJeff Kirsher } 968874aeea5SJeff Kirsher } 969874aeea5SJeff Kirsher 970874aeea5SJeff Kirsher void efx_link_set_wanted_fc(struct efx_nic *efx, u8 wanted_fc) 971874aeea5SJeff Kirsher { 972874aeea5SJeff Kirsher efx->wanted_fc = wanted_fc; 973874aeea5SJeff Kirsher if (efx->link_advertising) { 974874aeea5SJeff Kirsher if (wanted_fc & EFX_FC_RX) 975874aeea5SJeff Kirsher efx->link_advertising |= (ADVERTISED_Pause | 976874aeea5SJeff Kirsher ADVERTISED_Asym_Pause); 977874aeea5SJeff Kirsher else 978874aeea5SJeff Kirsher efx->link_advertising &= ~(ADVERTISED_Pause | 979874aeea5SJeff Kirsher ADVERTISED_Asym_Pause); 980874aeea5SJeff Kirsher if (wanted_fc & EFX_FC_TX) 981874aeea5SJeff Kirsher efx->link_advertising ^= ADVERTISED_Asym_Pause; 982874aeea5SJeff Kirsher } 983874aeea5SJeff Kirsher } 984874aeea5SJeff Kirsher 985874aeea5SJeff Kirsher static void efx_fini_port(struct efx_nic *efx); 986874aeea5SJeff Kirsher 9870d322413SEdward Cree /* We assume that efx->type->reconfigure_mac will always try to sync RX 9880d322413SEdward Cree * filters and therefore needs to read-lock the filter table against freeing 9890d322413SEdward Cree */ 9900d322413SEdward Cree void efx_mac_reconfigure(struct efx_nic *efx) 9910d322413SEdward Cree { 9920d322413SEdward Cree down_read(&efx->filter_sem); 9930d322413SEdward Cree efx->type->reconfigure_mac(efx); 9940d322413SEdward Cree up_read(&efx->filter_sem); 9950d322413SEdward Cree } 9960d322413SEdward Cree 997874aeea5SJeff Kirsher /* Push loopback/power/transmit disable settings to the PHY, and reconfigure 998874aeea5SJeff Kirsher * the MAC appropriately. All other PHY configuration changes are pushed 999874aeea5SJeff Kirsher * through phy_op->set_settings(), and pushed asynchronously to the MAC 1000874aeea5SJeff Kirsher * through efx_monitor(). 1001874aeea5SJeff Kirsher * 1002874aeea5SJeff Kirsher * Callers must hold the mac_lock 1003874aeea5SJeff Kirsher */ 1004874aeea5SJeff Kirsher int __efx_reconfigure_port(struct efx_nic *efx) 1005874aeea5SJeff Kirsher { 1006874aeea5SJeff Kirsher enum efx_phy_mode phy_mode; 1007874aeea5SJeff Kirsher int rc; 1008874aeea5SJeff Kirsher 1009874aeea5SJeff Kirsher WARN_ON(!mutex_is_locked(&efx->mac_lock)); 1010874aeea5SJeff Kirsher 1011874aeea5SJeff Kirsher /* Disable PHY transmit in mac level loopbacks */ 1012874aeea5SJeff Kirsher phy_mode = efx->phy_mode; 1013874aeea5SJeff Kirsher if (LOOPBACK_INTERNAL(efx)) 1014874aeea5SJeff Kirsher efx->phy_mode |= PHY_MODE_TX_DISABLED; 1015874aeea5SJeff Kirsher else 1016874aeea5SJeff Kirsher efx->phy_mode &= ~PHY_MODE_TX_DISABLED; 1017874aeea5SJeff Kirsher 1018874aeea5SJeff Kirsher rc = efx->type->reconfigure_port(efx); 1019874aeea5SJeff Kirsher 1020874aeea5SJeff Kirsher if (rc) 1021874aeea5SJeff Kirsher efx->phy_mode = phy_mode; 1022874aeea5SJeff Kirsher 1023874aeea5SJeff Kirsher return rc; 1024874aeea5SJeff Kirsher } 1025874aeea5SJeff Kirsher 1026874aeea5SJeff Kirsher /* Reinitialise the MAC to pick up new PHY settings, even if the port is 1027874aeea5SJeff Kirsher * disabled. */ 1028874aeea5SJeff Kirsher int efx_reconfigure_port(struct efx_nic *efx) 1029874aeea5SJeff Kirsher { 1030874aeea5SJeff Kirsher int rc; 1031874aeea5SJeff Kirsher 1032874aeea5SJeff Kirsher EFX_ASSERT_RESET_SERIALISED(efx); 1033874aeea5SJeff Kirsher 1034874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 1035874aeea5SJeff Kirsher rc = __efx_reconfigure_port(efx); 1036874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 1037874aeea5SJeff Kirsher 1038874aeea5SJeff Kirsher return rc; 1039874aeea5SJeff Kirsher } 1040874aeea5SJeff Kirsher 1041874aeea5SJeff Kirsher /* Asynchronous work item for changing MAC promiscuity and multicast 1042874aeea5SJeff Kirsher * hash. Avoid a drain/rx_ingress enable by reconfiguring the current 1043874aeea5SJeff Kirsher * MAC directly. */ 1044874aeea5SJeff Kirsher static void efx_mac_work(struct work_struct *data) 1045874aeea5SJeff Kirsher { 1046874aeea5SJeff Kirsher struct efx_nic *efx = container_of(data, struct efx_nic, mac_work); 1047874aeea5SJeff Kirsher 1048874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 104930b81cdaSBen Hutchings if (efx->port_enabled) 10500d322413SEdward Cree efx_mac_reconfigure(efx); 1051874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 1052874aeea5SJeff Kirsher } 1053874aeea5SJeff Kirsher 1054874aeea5SJeff Kirsher static int efx_probe_port(struct efx_nic *efx) 1055874aeea5SJeff Kirsher { 1056874aeea5SJeff Kirsher int rc; 1057874aeea5SJeff Kirsher 1058874aeea5SJeff Kirsher netif_dbg(efx, probe, efx->net_dev, "create port\n"); 1059874aeea5SJeff Kirsher 1060874aeea5SJeff Kirsher if (phy_flash_cfg) 1061874aeea5SJeff Kirsher efx->phy_mode = PHY_MODE_SPECIAL; 1062874aeea5SJeff Kirsher 1063874aeea5SJeff Kirsher /* Connect up MAC/PHY operations table */ 1064874aeea5SJeff Kirsher rc = efx->type->probe_port(efx); 1065874aeea5SJeff Kirsher if (rc) 1066874aeea5SJeff Kirsher return rc; 1067874aeea5SJeff Kirsher 1068e332bcb3SBen Hutchings /* Initialise MAC address to permanent address */ 1069cd84ff4dSEdward Cree ether_addr_copy(efx->net_dev->dev_addr, efx->net_dev->perm_addr); 1070874aeea5SJeff Kirsher 1071874aeea5SJeff Kirsher return 0; 1072874aeea5SJeff Kirsher } 1073874aeea5SJeff Kirsher 1074874aeea5SJeff Kirsher static int efx_init_port(struct efx_nic *efx) 1075874aeea5SJeff Kirsher { 1076874aeea5SJeff Kirsher int rc; 1077874aeea5SJeff Kirsher 1078874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "init port\n"); 1079874aeea5SJeff Kirsher 1080874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 1081874aeea5SJeff Kirsher 1082874aeea5SJeff Kirsher rc = efx->phy_op->init(efx); 1083874aeea5SJeff Kirsher if (rc) 1084874aeea5SJeff Kirsher goto fail1; 1085874aeea5SJeff Kirsher 1086874aeea5SJeff Kirsher efx->port_initialized = true; 1087874aeea5SJeff Kirsher 1088874aeea5SJeff Kirsher /* Reconfigure the MAC before creating dma queues (required for 1089874aeea5SJeff Kirsher * Falcon/A1 where RX_INGR_EN/TX_DRAIN_EN isn't supported) */ 10900d322413SEdward Cree efx_mac_reconfigure(efx); 1091874aeea5SJeff Kirsher 1092874aeea5SJeff Kirsher /* Ensure the PHY advertises the correct flow control settings */ 1093874aeea5SJeff Kirsher rc = efx->phy_op->reconfigure(efx); 1094267d9d73SEdward Cree if (rc && rc != -EPERM) 1095874aeea5SJeff Kirsher goto fail2; 1096874aeea5SJeff Kirsher 1097874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 1098874aeea5SJeff Kirsher return 0; 1099874aeea5SJeff Kirsher 1100874aeea5SJeff Kirsher fail2: 1101874aeea5SJeff Kirsher efx->phy_op->fini(efx); 1102874aeea5SJeff Kirsher fail1: 1103874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 1104874aeea5SJeff Kirsher return rc; 1105874aeea5SJeff Kirsher } 1106874aeea5SJeff Kirsher 1107874aeea5SJeff Kirsher static void efx_start_port(struct efx_nic *efx) 1108874aeea5SJeff Kirsher { 1109874aeea5SJeff Kirsher netif_dbg(efx, ifup, efx->net_dev, "start port\n"); 1110874aeea5SJeff Kirsher BUG_ON(efx->port_enabled); 1111874aeea5SJeff Kirsher 1112874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 1113874aeea5SJeff Kirsher efx->port_enabled = true; 1114874aeea5SJeff Kirsher 1115d615c039SBen Hutchings /* Ensure MAC ingress/egress is enabled */ 11160d322413SEdward Cree efx_mac_reconfigure(efx); 1117874aeea5SJeff Kirsher 1118874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 1119874aeea5SJeff Kirsher } 1120874aeea5SJeff Kirsher 1121d615c039SBen Hutchings /* Cancel work for MAC reconfiguration, periodic hardware monitoring 1122d615c039SBen Hutchings * and the async self-test, wait for them to finish and prevent them 1123d615c039SBen Hutchings * being scheduled again. This doesn't cover online resets, which 1124d615c039SBen Hutchings * should only be cancelled when removing the device. 1125d615c039SBen Hutchings */ 1126874aeea5SJeff Kirsher static void efx_stop_port(struct efx_nic *efx) 1127874aeea5SJeff Kirsher { 1128874aeea5SJeff Kirsher netif_dbg(efx, ifdown, efx->net_dev, "stop port\n"); 1129874aeea5SJeff Kirsher 1130d615c039SBen Hutchings EFX_ASSERT_RESET_SERIALISED(efx); 1131d615c039SBen Hutchings 1132874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 1133874aeea5SJeff Kirsher efx->port_enabled = false; 1134874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 1135874aeea5SJeff Kirsher 1136874aeea5SJeff Kirsher /* Serialise against efx_set_multicast_list() */ 1137874aeea5SJeff Kirsher netif_addr_lock_bh(efx->net_dev); 1138874aeea5SJeff Kirsher netif_addr_unlock_bh(efx->net_dev); 1139d615c039SBen Hutchings 1140d615c039SBen Hutchings cancel_delayed_work_sync(&efx->monitor_work); 1141d615c039SBen Hutchings efx_selftest_async_cancel(efx); 1142d615c039SBen Hutchings cancel_work_sync(&efx->mac_work); 1143874aeea5SJeff Kirsher } 1144874aeea5SJeff Kirsher 1145874aeea5SJeff Kirsher static void efx_fini_port(struct efx_nic *efx) 1146874aeea5SJeff Kirsher { 1147874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "shut down port\n"); 1148874aeea5SJeff Kirsher 1149874aeea5SJeff Kirsher if (!efx->port_initialized) 1150874aeea5SJeff Kirsher return; 1151874aeea5SJeff Kirsher 1152874aeea5SJeff Kirsher efx->phy_op->fini(efx); 1153874aeea5SJeff Kirsher efx->port_initialized = false; 1154874aeea5SJeff Kirsher 1155874aeea5SJeff Kirsher efx->link_state.up = false; 1156874aeea5SJeff Kirsher efx_link_status_changed(efx); 1157874aeea5SJeff Kirsher } 1158874aeea5SJeff Kirsher 1159874aeea5SJeff Kirsher static void efx_remove_port(struct efx_nic *efx) 1160874aeea5SJeff Kirsher { 1161874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "destroying port\n"); 1162874aeea5SJeff Kirsher 1163874aeea5SJeff Kirsher efx->type->remove_port(efx); 1164874aeea5SJeff Kirsher } 1165874aeea5SJeff Kirsher 1166874aeea5SJeff Kirsher /************************************************************************** 1167874aeea5SJeff Kirsher * 1168874aeea5SJeff Kirsher * NIC handling 1169874aeea5SJeff Kirsher * 1170874aeea5SJeff Kirsher **************************************************************************/ 1171874aeea5SJeff Kirsher 11720bcf4a64SBen Hutchings static LIST_HEAD(efx_primary_list); 11730bcf4a64SBen Hutchings static LIST_HEAD(efx_unassociated_list); 11740bcf4a64SBen Hutchings 11750bcf4a64SBen Hutchings static bool efx_same_controller(struct efx_nic *left, struct efx_nic *right) 11760bcf4a64SBen Hutchings { 11770bcf4a64SBen Hutchings return left->type == right->type && 11780bcf4a64SBen Hutchings left->vpd_sn && right->vpd_sn && 11790bcf4a64SBen Hutchings !strcmp(left->vpd_sn, right->vpd_sn); 11800bcf4a64SBen Hutchings } 11810bcf4a64SBen Hutchings 11820bcf4a64SBen Hutchings static void efx_associate(struct efx_nic *efx) 11830bcf4a64SBen Hutchings { 11840bcf4a64SBen Hutchings struct efx_nic *other, *next; 11850bcf4a64SBen Hutchings 11860bcf4a64SBen Hutchings if (efx->primary == efx) { 11870bcf4a64SBen Hutchings /* Adding primary function; look for secondaries */ 11880bcf4a64SBen Hutchings 11890bcf4a64SBen Hutchings netif_dbg(efx, probe, efx->net_dev, "adding to primary list\n"); 11900bcf4a64SBen Hutchings list_add_tail(&efx->node, &efx_primary_list); 11910bcf4a64SBen Hutchings 11920bcf4a64SBen Hutchings list_for_each_entry_safe(other, next, &efx_unassociated_list, 11930bcf4a64SBen Hutchings node) { 11940bcf4a64SBen Hutchings if (efx_same_controller(efx, other)) { 11950bcf4a64SBen Hutchings list_del(&other->node); 11960bcf4a64SBen Hutchings netif_dbg(other, probe, other->net_dev, 11970bcf4a64SBen Hutchings "moving to secondary list of %s %s\n", 11980bcf4a64SBen Hutchings pci_name(efx->pci_dev), 11990bcf4a64SBen Hutchings efx->net_dev->name); 12000bcf4a64SBen Hutchings list_add_tail(&other->node, 12010bcf4a64SBen Hutchings &efx->secondary_list); 12020bcf4a64SBen Hutchings other->primary = efx; 12030bcf4a64SBen Hutchings } 12040bcf4a64SBen Hutchings } 12050bcf4a64SBen Hutchings } else { 12060bcf4a64SBen Hutchings /* Adding secondary function; look for primary */ 12070bcf4a64SBen Hutchings 12080bcf4a64SBen Hutchings list_for_each_entry(other, &efx_primary_list, node) { 12090bcf4a64SBen Hutchings if (efx_same_controller(efx, other)) { 12100bcf4a64SBen Hutchings netif_dbg(efx, probe, efx->net_dev, 12110bcf4a64SBen Hutchings "adding to secondary list of %s %s\n", 12120bcf4a64SBen Hutchings pci_name(other->pci_dev), 12130bcf4a64SBen Hutchings other->net_dev->name); 12140bcf4a64SBen Hutchings list_add_tail(&efx->node, 12150bcf4a64SBen Hutchings &other->secondary_list); 12160bcf4a64SBen Hutchings efx->primary = other; 12170bcf4a64SBen Hutchings return; 12180bcf4a64SBen Hutchings } 12190bcf4a64SBen Hutchings } 12200bcf4a64SBen Hutchings 12210bcf4a64SBen Hutchings netif_dbg(efx, probe, efx->net_dev, 12220bcf4a64SBen Hutchings "adding to unassociated list\n"); 12230bcf4a64SBen Hutchings list_add_tail(&efx->node, &efx_unassociated_list); 12240bcf4a64SBen Hutchings } 12250bcf4a64SBen Hutchings } 12260bcf4a64SBen Hutchings 12270bcf4a64SBen Hutchings static void efx_dissociate(struct efx_nic *efx) 12280bcf4a64SBen Hutchings { 12290bcf4a64SBen Hutchings struct efx_nic *other, *next; 12300bcf4a64SBen Hutchings 12310bcf4a64SBen Hutchings list_del(&efx->node); 12320bcf4a64SBen Hutchings efx->primary = NULL; 12330bcf4a64SBen Hutchings 12340bcf4a64SBen Hutchings list_for_each_entry_safe(other, next, &efx->secondary_list, node) { 12350bcf4a64SBen Hutchings list_del(&other->node); 12360bcf4a64SBen Hutchings netif_dbg(other, probe, other->net_dev, 12370bcf4a64SBen Hutchings "moving to unassociated list\n"); 12380bcf4a64SBen Hutchings list_add_tail(&other->node, &efx_unassociated_list); 12390bcf4a64SBen Hutchings other->primary = NULL; 12400bcf4a64SBen Hutchings } 12410bcf4a64SBen Hutchings } 12420bcf4a64SBen Hutchings 1243874aeea5SJeff Kirsher /* This configures the PCI device to enable I/O and DMA. */ 1244874aeea5SJeff Kirsher static int efx_init_io(struct efx_nic *efx) 1245874aeea5SJeff Kirsher { 1246874aeea5SJeff Kirsher struct pci_dev *pci_dev = efx->pci_dev; 1247874aeea5SJeff Kirsher dma_addr_t dma_mask = efx->type->max_dma_mask; 1248b105798fSBen Hutchings unsigned int mem_map_size = efx->type->mem_map_size(efx); 124902246a7fSShradha Shah int rc, bar; 1250874aeea5SJeff Kirsher 1251874aeea5SJeff Kirsher netif_dbg(efx, probe, efx->net_dev, "initialising I/O\n"); 1252874aeea5SJeff Kirsher 125302246a7fSShradha Shah bar = efx->type->mem_bar; 125402246a7fSShradha Shah 1255874aeea5SJeff Kirsher rc = pci_enable_device(pci_dev); 1256874aeea5SJeff Kirsher if (rc) { 1257874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 1258874aeea5SJeff Kirsher "failed to enable PCI device\n"); 1259874aeea5SJeff Kirsher goto fail1; 1260874aeea5SJeff Kirsher } 1261874aeea5SJeff Kirsher 1262874aeea5SJeff Kirsher pci_set_master(pci_dev); 1263874aeea5SJeff Kirsher 1264874aeea5SJeff Kirsher /* Set the PCI DMA mask. Try all possibilities from our 1265874aeea5SJeff Kirsher * genuine mask down to 32 bits, because some architectures 1266874aeea5SJeff Kirsher * (e.g. x86_64 with iommu_sac_force set) will allow 40 bit 1267874aeea5SJeff Kirsher * masks event though they reject 46 bit masks. 1268874aeea5SJeff Kirsher */ 1269874aeea5SJeff Kirsher while (dma_mask > 0x7fffffffUL) { 12709663dedaSRussell King rc = dma_set_mask_and_coherent(&pci_dev->dev, dma_mask); 1271e9e01846SBen Hutchings if (rc == 0) 1272874aeea5SJeff Kirsher break; 1273874aeea5SJeff Kirsher dma_mask >>= 1; 1274874aeea5SJeff Kirsher } 1275874aeea5SJeff Kirsher if (rc) { 1276874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 1277874aeea5SJeff Kirsher "could not find a suitable DMA mask\n"); 1278874aeea5SJeff Kirsher goto fail2; 1279874aeea5SJeff Kirsher } 1280874aeea5SJeff Kirsher netif_dbg(efx, probe, efx->net_dev, 1281874aeea5SJeff Kirsher "using DMA mask %llx\n", (unsigned long long) dma_mask); 1282874aeea5SJeff Kirsher 128302246a7fSShradha Shah efx->membase_phys = pci_resource_start(efx->pci_dev, bar); 128402246a7fSShradha Shah rc = pci_request_region(pci_dev, bar, "sfc"); 1285874aeea5SJeff Kirsher if (rc) { 1286874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 1287874aeea5SJeff Kirsher "request for memory BAR failed\n"); 1288874aeea5SJeff Kirsher rc = -EIO; 1289874aeea5SJeff Kirsher goto fail3; 1290874aeea5SJeff Kirsher } 1291b105798fSBen Hutchings efx->membase = ioremap_nocache(efx->membase_phys, mem_map_size); 1292874aeea5SJeff Kirsher if (!efx->membase) { 1293874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 1294874aeea5SJeff Kirsher "could not map memory BAR at %llx+%x\n", 1295b105798fSBen Hutchings (unsigned long long)efx->membase_phys, mem_map_size); 1296874aeea5SJeff Kirsher rc = -ENOMEM; 1297874aeea5SJeff Kirsher goto fail4; 1298874aeea5SJeff Kirsher } 1299874aeea5SJeff Kirsher netif_dbg(efx, probe, efx->net_dev, 1300874aeea5SJeff Kirsher "memory BAR at %llx+%x (virtual %p)\n", 1301b105798fSBen Hutchings (unsigned long long)efx->membase_phys, mem_map_size, 1302b105798fSBen Hutchings efx->membase); 1303874aeea5SJeff Kirsher 1304874aeea5SJeff Kirsher return 0; 1305874aeea5SJeff Kirsher 1306874aeea5SJeff Kirsher fail4: 130702246a7fSShradha Shah pci_release_region(efx->pci_dev, bar); 1308874aeea5SJeff Kirsher fail3: 1309874aeea5SJeff Kirsher efx->membase_phys = 0; 1310874aeea5SJeff Kirsher fail2: 1311874aeea5SJeff Kirsher pci_disable_device(efx->pci_dev); 1312874aeea5SJeff Kirsher fail1: 1313874aeea5SJeff Kirsher return rc; 1314874aeea5SJeff Kirsher } 1315874aeea5SJeff Kirsher 1316874aeea5SJeff Kirsher static void efx_fini_io(struct efx_nic *efx) 1317874aeea5SJeff Kirsher { 131802246a7fSShradha Shah int bar; 131902246a7fSShradha Shah 1320874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "shutting down I/O\n"); 1321874aeea5SJeff Kirsher 1322874aeea5SJeff Kirsher if (efx->membase) { 1323874aeea5SJeff Kirsher iounmap(efx->membase); 1324874aeea5SJeff Kirsher efx->membase = NULL; 1325874aeea5SJeff Kirsher } 1326874aeea5SJeff Kirsher 1327874aeea5SJeff Kirsher if (efx->membase_phys) { 132802246a7fSShradha Shah bar = efx->type->mem_bar; 132902246a7fSShradha Shah pci_release_region(efx->pci_dev, bar); 1330874aeea5SJeff Kirsher efx->membase_phys = 0; 1331874aeea5SJeff Kirsher } 1332874aeea5SJeff Kirsher 13336598dad2SDaniel Pieczko /* Don't disable bus-mastering if VFs are assigned */ 13346598dad2SDaniel Pieczko if (!pci_vfs_assigned(efx->pci_dev)) 1335874aeea5SJeff Kirsher pci_disable_device(efx->pci_dev); 1336874aeea5SJeff Kirsher } 1337874aeea5SJeff Kirsher 1338267c0157SJon Cooper void efx_set_default_rx_indir_table(struct efx_nic *efx) 1339267c0157SJon Cooper { 1340267c0157SJon Cooper size_t i; 1341267c0157SJon Cooper 1342267c0157SJon Cooper for (i = 0; i < ARRAY_SIZE(efx->rx_indir_table); i++) 1343267c0157SJon Cooper efx->rx_indir_table[i] = 1344267c0157SJon Cooper ethtool_rxfh_indir_default(i, efx->rss_spread); 1345267c0157SJon Cooper } 1346267c0157SJon Cooper 1347a9a52506SBen Hutchings static unsigned int efx_wanted_parallelism(struct efx_nic *efx) 1348874aeea5SJeff Kirsher { 1349cdb08f8fSBen Hutchings cpumask_var_t thread_mask; 1350a16e5b24SBen Hutchings unsigned int count; 1351874aeea5SJeff Kirsher int cpu; 1352874aeea5SJeff Kirsher 1353cd2d5b52SBen Hutchings if (rss_cpus) { 1354cd2d5b52SBen Hutchings count = rss_cpus; 1355cd2d5b52SBen Hutchings } else { 1356cdb08f8fSBen Hutchings if (unlikely(!zalloc_cpumask_var(&thread_mask, GFP_KERNEL))) { 1357a9a52506SBen Hutchings netif_warn(efx, probe, efx->net_dev, 1358a9a52506SBen Hutchings "RSS disabled due to allocation failure\n"); 1359874aeea5SJeff Kirsher return 1; 1360874aeea5SJeff Kirsher } 1361874aeea5SJeff Kirsher 1362874aeea5SJeff Kirsher count = 0; 1363874aeea5SJeff Kirsher for_each_online_cpu(cpu) { 1364cdb08f8fSBen Hutchings if (!cpumask_test_cpu(cpu, thread_mask)) { 1365874aeea5SJeff Kirsher ++count; 1366cdb08f8fSBen Hutchings cpumask_or(thread_mask, thread_mask, 136706931e62SBartosz Golaszewski topology_sibling_cpumask(cpu)); 1368874aeea5SJeff Kirsher } 1369874aeea5SJeff Kirsher } 1370874aeea5SJeff Kirsher 1371cdb08f8fSBen Hutchings free_cpumask_var(thread_mask); 1372cd2d5b52SBen Hutchings } 1373cd2d5b52SBen Hutchings 1374cd2d5b52SBen Hutchings /* If RSS is requested for the PF *and* VFs then we can't write RSS 1375cd2d5b52SBen Hutchings * table entries that are inaccessible to VFs 1376cd2d5b52SBen Hutchings */ 13777fa8d547SShradha Shah #ifdef CONFIG_SFC_SRIOV 13787fa8d547SShradha Shah if (efx->type->sriov_wanted) { 1379d98a4ffeSShradha Shah if (efx->type->sriov_wanted(efx) && efx_vf_size(efx) > 1 && 1380cd2d5b52SBen Hutchings count > efx_vf_size(efx)) { 1381cd2d5b52SBen Hutchings netif_warn(efx, probe, efx->net_dev, 1382cd2d5b52SBen Hutchings "Reducing number of RSS channels from %u to %u for " 1383cd2d5b52SBen Hutchings "VF support. Increase vf-msix-limit to use more " 1384cd2d5b52SBen Hutchings "channels on the PF.\n", 1385cd2d5b52SBen Hutchings count, efx_vf_size(efx)); 1386cd2d5b52SBen Hutchings count = efx_vf_size(efx); 1387cd2d5b52SBen Hutchings } 13887fa8d547SShradha Shah } 13897fa8d547SShradha Shah #endif 1390cd2d5b52SBen Hutchings 1391874aeea5SJeff Kirsher return count; 1392874aeea5SJeff Kirsher } 1393874aeea5SJeff Kirsher 1394874aeea5SJeff Kirsher /* Probe the number and type of interrupts we are able to obtain, and 1395874aeea5SJeff Kirsher * the resulting numbers of channels and RX queues. 1396874aeea5SJeff Kirsher */ 1397874aeea5SJeff Kirsher static int efx_probe_interrupts(struct efx_nic *efx) 1398874aeea5SJeff Kirsher { 13997f967c01SBen Hutchings unsigned int extra_channels = 0; 14007f967c01SBen Hutchings unsigned int i, j; 1401a16e5b24SBen Hutchings int rc; 1402874aeea5SJeff Kirsher 14037f967c01SBen Hutchings for (i = 0; i < EFX_MAX_EXTRA_CHANNELS; i++) 14047f967c01SBen Hutchings if (efx->extra_channel_type[i]) 14057f967c01SBen Hutchings ++extra_channels; 14067f967c01SBen Hutchings 1407874aeea5SJeff Kirsher if (efx->interrupt_mode == EFX_INT_MODE_MSIX) { 1408874aeea5SJeff Kirsher struct msix_entry xentries[EFX_MAX_CHANNELS]; 1409a16e5b24SBen Hutchings unsigned int n_channels; 1410874aeea5SJeff Kirsher 1411a9a52506SBen Hutchings n_channels = efx_wanted_parallelism(efx); 1412b0fbdae1SShradha Shah if (efx_separate_tx_channels) 1413874aeea5SJeff Kirsher n_channels *= 2; 14147f967c01SBen Hutchings n_channels += extra_channels; 1415b105798fSBen Hutchings n_channels = min(n_channels, efx->max_channels); 1416874aeea5SJeff Kirsher 1417874aeea5SJeff Kirsher for (i = 0; i < n_channels; i++) 1418874aeea5SJeff Kirsher xentries[i].entry = i; 1419184603d8SAlexander Gordeev rc = pci_enable_msix_range(efx->pci_dev, 1420184603d8SAlexander Gordeev xentries, 1, n_channels); 1421184603d8SAlexander Gordeev if (rc < 0) { 1422184603d8SAlexander Gordeev /* Fall back to single channel MSI */ 1423184603d8SAlexander Gordeev netif_err(efx, drv, efx->net_dev, 1424184603d8SAlexander Gordeev "could not enable MSI-X\n"); 142562980cb6SAndrew Rybchenko if (efx->type->min_interrupt_mode >= EFX_INT_MODE_MSI) 142662980cb6SAndrew Rybchenko efx->interrupt_mode = EFX_INT_MODE_MSI; 142762980cb6SAndrew Rybchenko else 142862980cb6SAndrew Rybchenko return rc; 1429184603d8SAlexander Gordeev } else if (rc < n_channels) { 1430874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, 1431874aeea5SJeff Kirsher "WARNING: Insufficient MSI-X vectors" 1432a16e5b24SBen Hutchings " available (%d < %u).\n", rc, n_channels); 1433874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, 1434874aeea5SJeff Kirsher "WARNING: Performance may be reduced.\n"); 1435874aeea5SJeff Kirsher n_channels = rc; 1436874aeea5SJeff Kirsher } 1437874aeea5SJeff Kirsher 1438184603d8SAlexander Gordeev if (rc > 0) { 1439874aeea5SJeff Kirsher efx->n_channels = n_channels; 14407f967c01SBen Hutchings if (n_channels > extra_channels) 14417f967c01SBen Hutchings n_channels -= extra_channels; 1442b0fbdae1SShradha Shah if (efx_separate_tx_channels) { 1443b0fbdae1SShradha Shah efx->n_tx_channels = min(max(n_channels / 2, 1444b0fbdae1SShradha Shah 1U), 1445b0fbdae1SShradha Shah efx->max_tx_channels); 14467f967c01SBen Hutchings efx->n_rx_channels = max(n_channels - 14477f967c01SBen Hutchings efx->n_tx_channels, 14487f967c01SBen Hutchings 1U); 1449874aeea5SJeff Kirsher } else { 1450b0fbdae1SShradha Shah efx->n_tx_channels = min(n_channels, 1451b0fbdae1SShradha Shah efx->max_tx_channels); 14527f967c01SBen Hutchings efx->n_rx_channels = n_channels; 1453874aeea5SJeff Kirsher } 14547f967c01SBen Hutchings for (i = 0; i < efx->n_channels; i++) 1455874aeea5SJeff Kirsher efx_get_channel(efx, i)->irq = 1456874aeea5SJeff Kirsher xentries[i].vector; 1457874aeea5SJeff Kirsher } 1458874aeea5SJeff Kirsher } 1459874aeea5SJeff Kirsher 1460874aeea5SJeff Kirsher /* Try single interrupt MSI */ 1461874aeea5SJeff Kirsher if (efx->interrupt_mode == EFX_INT_MODE_MSI) { 1462874aeea5SJeff Kirsher efx->n_channels = 1; 1463874aeea5SJeff Kirsher efx->n_rx_channels = 1; 1464874aeea5SJeff Kirsher efx->n_tx_channels = 1; 1465874aeea5SJeff Kirsher rc = pci_enable_msi(efx->pci_dev); 1466874aeea5SJeff Kirsher if (rc == 0) { 1467874aeea5SJeff Kirsher efx_get_channel(efx, 0)->irq = efx->pci_dev->irq; 1468874aeea5SJeff Kirsher } else { 1469874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, 1470874aeea5SJeff Kirsher "could not enable MSI\n"); 147162980cb6SAndrew Rybchenko if (efx->type->min_interrupt_mode >= EFX_INT_MODE_LEGACY) 1472874aeea5SJeff Kirsher efx->interrupt_mode = EFX_INT_MODE_LEGACY; 147362980cb6SAndrew Rybchenko else 147462980cb6SAndrew Rybchenko return rc; 1475874aeea5SJeff Kirsher } 1476874aeea5SJeff Kirsher } 1477874aeea5SJeff Kirsher 1478874aeea5SJeff Kirsher /* Assume legacy interrupts */ 1479874aeea5SJeff Kirsher if (efx->interrupt_mode == EFX_INT_MODE_LEGACY) { 1480b0fbdae1SShradha Shah efx->n_channels = 1 + (efx_separate_tx_channels ? 1 : 0); 1481874aeea5SJeff Kirsher efx->n_rx_channels = 1; 1482874aeea5SJeff Kirsher efx->n_tx_channels = 1; 1483874aeea5SJeff Kirsher efx->legacy_irq = efx->pci_dev->irq; 1484874aeea5SJeff Kirsher } 1485874aeea5SJeff Kirsher 14867f967c01SBen Hutchings /* Assign extra channels if possible */ 14877f967c01SBen Hutchings j = efx->n_channels; 14887f967c01SBen Hutchings for (i = 0; i < EFX_MAX_EXTRA_CHANNELS; i++) { 14897f967c01SBen Hutchings if (!efx->extra_channel_type[i]) 14907f967c01SBen Hutchings continue; 14917f967c01SBen Hutchings if (efx->interrupt_mode != EFX_INT_MODE_MSIX || 14927f967c01SBen Hutchings efx->n_channels <= extra_channels) { 14937f967c01SBen Hutchings efx->extra_channel_type[i]->handle_no_channel(efx); 14947f967c01SBen Hutchings } else { 14957f967c01SBen Hutchings --j; 14967f967c01SBen Hutchings efx_get_channel(efx, j)->type = 14977f967c01SBen Hutchings efx->extra_channel_type[i]; 14987f967c01SBen Hutchings } 14997f967c01SBen Hutchings } 15007f967c01SBen Hutchings 1501cd2d5b52SBen Hutchings /* RSS might be usable on VFs even if it is disabled on the PF */ 15027fa8d547SShradha Shah #ifdef CONFIG_SFC_SRIOV 15037fa8d547SShradha Shah if (efx->type->sriov_wanted) { 1504327c685eSShradha Shah efx->rss_spread = ((efx->n_rx_channels > 1 || 1505d98a4ffeSShradha Shah !efx->type->sriov_wanted(efx)) ? 1506cd2d5b52SBen Hutchings efx->n_rx_channels : efx_vf_size(efx)); 15077fa8d547SShradha Shah return 0; 15087fa8d547SShradha Shah } 15097fa8d547SShradha Shah #endif 15107fa8d547SShradha Shah efx->rss_spread = efx->n_rx_channels; 1511cd2d5b52SBen Hutchings 1512874aeea5SJeff Kirsher return 0; 1513874aeea5SJeff Kirsher } 1514874aeea5SJeff Kirsher 1515261e4d96SJon Cooper static int efx_soft_enable_interrupts(struct efx_nic *efx) 1516d8291187SBen Hutchings { 1517261e4d96SJon Cooper struct efx_channel *channel, *end_channel; 1518261e4d96SJon Cooper int rc; 1519d8291187SBen Hutchings 1520d8291187SBen Hutchings BUG_ON(efx->state == STATE_DISABLED); 1521d8291187SBen Hutchings 1522d8291187SBen Hutchings efx->irq_soft_enabled = true; 1523d8291187SBen Hutchings smp_wmb(); 1524d8291187SBen Hutchings 1525d8291187SBen Hutchings efx_for_each_channel(channel, efx) { 1526261e4d96SJon Cooper if (!channel->type->keep_eventq) { 1527261e4d96SJon Cooper rc = efx_init_eventq(channel); 1528261e4d96SJon Cooper if (rc) 1529261e4d96SJon Cooper goto fail; 1530261e4d96SJon Cooper } 1531d8291187SBen Hutchings efx_start_eventq(channel); 1532d8291187SBen Hutchings } 1533d8291187SBen Hutchings 1534d8291187SBen Hutchings efx_mcdi_mode_event(efx); 1535261e4d96SJon Cooper 1536261e4d96SJon Cooper return 0; 1537261e4d96SJon Cooper fail: 1538261e4d96SJon Cooper end_channel = channel; 1539261e4d96SJon Cooper efx_for_each_channel(channel, efx) { 1540261e4d96SJon Cooper if (channel == end_channel) 1541261e4d96SJon Cooper break; 1542261e4d96SJon Cooper efx_stop_eventq(channel); 1543261e4d96SJon Cooper if (!channel->type->keep_eventq) 1544261e4d96SJon Cooper efx_fini_eventq(channel); 1545261e4d96SJon Cooper } 1546261e4d96SJon Cooper 1547261e4d96SJon Cooper return rc; 1548d8291187SBen Hutchings } 1549d8291187SBen Hutchings 1550d8291187SBen Hutchings static void efx_soft_disable_interrupts(struct efx_nic *efx) 1551d8291187SBen Hutchings { 1552d8291187SBen Hutchings struct efx_channel *channel; 1553d8291187SBen Hutchings 1554d8291187SBen Hutchings if (efx->state == STATE_DISABLED) 1555d8291187SBen Hutchings return; 1556d8291187SBen Hutchings 1557d8291187SBen Hutchings efx_mcdi_mode_poll(efx); 1558d8291187SBen Hutchings 1559d8291187SBen Hutchings efx->irq_soft_enabled = false; 1560d8291187SBen Hutchings smp_wmb(); 1561d8291187SBen Hutchings 1562d8291187SBen Hutchings if (efx->legacy_irq) 1563d8291187SBen Hutchings synchronize_irq(efx->legacy_irq); 1564d8291187SBen Hutchings 1565d8291187SBen Hutchings efx_for_each_channel(channel, efx) { 1566d8291187SBen Hutchings if (channel->irq) 1567d8291187SBen Hutchings synchronize_irq(channel->irq); 1568d8291187SBen Hutchings 1569d8291187SBen Hutchings efx_stop_eventq(channel); 1570d8291187SBen Hutchings if (!channel->type->keep_eventq) 1571d8291187SBen Hutchings efx_fini_eventq(channel); 1572d8291187SBen Hutchings } 1573cade715fSBen Hutchings 1574cade715fSBen Hutchings /* Flush the asynchronous MCDI request queue */ 1575cade715fSBen Hutchings efx_mcdi_flush_async(efx); 1576d8291187SBen Hutchings } 1577d8291187SBen Hutchings 1578261e4d96SJon Cooper static int efx_enable_interrupts(struct efx_nic *efx) 15799f2cb71cSBen Hutchings { 1580261e4d96SJon Cooper struct efx_channel *channel, *end_channel; 1581261e4d96SJon Cooper int rc; 15829f2cb71cSBen Hutchings 15838b7325b4SBen Hutchings BUG_ON(efx->state == STATE_DISABLED); 15848b7325b4SBen Hutchings 1585b28405b0SAlexandre Rames if (efx->eeh_disabled_legacy_irq) { 1586b28405b0SAlexandre Rames enable_irq(efx->legacy_irq); 1587b28405b0SAlexandre Rames efx->eeh_disabled_legacy_irq = false; 1588b28405b0SAlexandre Rames } 1589d8291187SBen Hutchings 159086094f7fSBen Hutchings efx->type->irq_enable_master(efx); 15919f2cb71cSBen Hutchings 15929f2cb71cSBen Hutchings efx_for_each_channel(channel, efx) { 1593261e4d96SJon Cooper if (channel->type->keep_eventq) { 1594261e4d96SJon Cooper rc = efx_init_eventq(channel); 1595261e4d96SJon Cooper if (rc) 1596261e4d96SJon Cooper goto fail; 1597261e4d96SJon Cooper } 15989f2cb71cSBen Hutchings } 15999f2cb71cSBen Hutchings 1600261e4d96SJon Cooper rc = efx_soft_enable_interrupts(efx); 1601261e4d96SJon Cooper if (rc) 1602261e4d96SJon Cooper goto fail; 1603261e4d96SJon Cooper 1604261e4d96SJon Cooper return 0; 1605261e4d96SJon Cooper 1606261e4d96SJon Cooper fail: 1607261e4d96SJon Cooper end_channel = channel; 1608261e4d96SJon Cooper efx_for_each_channel(channel, efx) { 1609261e4d96SJon Cooper if (channel == end_channel) 1610261e4d96SJon Cooper break; 1611261e4d96SJon Cooper if (channel->type->keep_eventq) 1612261e4d96SJon Cooper efx_fini_eventq(channel); 1613261e4d96SJon Cooper } 1614261e4d96SJon Cooper 1615261e4d96SJon Cooper efx->type->irq_disable_non_ev(efx); 1616261e4d96SJon Cooper 1617261e4d96SJon Cooper return rc; 16189f2cb71cSBen Hutchings } 16199f2cb71cSBen Hutchings 1620d8291187SBen Hutchings static void efx_disable_interrupts(struct efx_nic *efx) 16219f2cb71cSBen Hutchings { 16229f2cb71cSBen Hutchings struct efx_channel *channel; 16239f2cb71cSBen Hutchings 1624d8291187SBen Hutchings efx_soft_disable_interrupts(efx); 16259f2cb71cSBen Hutchings 16269f2cb71cSBen Hutchings efx_for_each_channel(channel, efx) { 1627d8291187SBen Hutchings if (channel->type->keep_eventq) 16289f2cb71cSBen Hutchings efx_fini_eventq(channel); 16299f2cb71cSBen Hutchings } 1630d8291187SBen Hutchings 163186094f7fSBen Hutchings efx->type->irq_disable_non_ev(efx); 16329f2cb71cSBen Hutchings } 16339f2cb71cSBen Hutchings 1634874aeea5SJeff Kirsher static void efx_remove_interrupts(struct efx_nic *efx) 1635874aeea5SJeff Kirsher { 1636874aeea5SJeff Kirsher struct efx_channel *channel; 1637874aeea5SJeff Kirsher 1638874aeea5SJeff Kirsher /* Remove MSI/MSI-X interrupts */ 1639874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) 1640874aeea5SJeff Kirsher channel->irq = 0; 1641874aeea5SJeff Kirsher pci_disable_msi(efx->pci_dev); 1642874aeea5SJeff Kirsher pci_disable_msix(efx->pci_dev); 1643874aeea5SJeff Kirsher 1644874aeea5SJeff Kirsher /* Remove legacy interrupt */ 1645874aeea5SJeff Kirsher efx->legacy_irq = 0; 1646874aeea5SJeff Kirsher } 1647874aeea5SJeff Kirsher 1648874aeea5SJeff Kirsher static void efx_set_channels(struct efx_nic *efx) 1649874aeea5SJeff Kirsher { 1650874aeea5SJeff Kirsher struct efx_channel *channel; 1651874aeea5SJeff Kirsher struct efx_tx_queue *tx_queue; 1652874aeea5SJeff Kirsher 1653874aeea5SJeff Kirsher efx->tx_channel_offset = 1654b0fbdae1SShradha Shah efx_separate_tx_channels ? 1655b0fbdae1SShradha Shah efx->n_channels - efx->n_tx_channels : 0; 1656874aeea5SJeff Kirsher 165779d68b37SStuart Hodgson /* We need to mark which channels really have RX and TX 165879d68b37SStuart Hodgson * queues, and adjust the TX queue numbers if we have separate 1659874aeea5SJeff Kirsher * RX-only and TX-only channels. 1660874aeea5SJeff Kirsher */ 1661874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) { 166279d68b37SStuart Hodgson if (channel->channel < efx->n_rx_channels) 166379d68b37SStuart Hodgson channel->rx_queue.core_index = channel->channel; 166479d68b37SStuart Hodgson else 166579d68b37SStuart Hodgson channel->rx_queue.core_index = -1; 166679d68b37SStuart Hodgson 1667874aeea5SJeff Kirsher efx_for_each_channel_tx_queue(tx_queue, channel) 1668874aeea5SJeff Kirsher tx_queue->queue -= (efx->tx_channel_offset * 1669874aeea5SJeff Kirsher EFX_TXQ_TYPES); 1670874aeea5SJeff Kirsher } 1671874aeea5SJeff Kirsher } 1672874aeea5SJeff Kirsher 1673874aeea5SJeff Kirsher static int efx_probe_nic(struct efx_nic *efx) 1674874aeea5SJeff Kirsher { 1675874aeea5SJeff Kirsher int rc; 1676874aeea5SJeff Kirsher 1677874aeea5SJeff Kirsher netif_dbg(efx, probe, efx->net_dev, "creating NIC\n"); 1678874aeea5SJeff Kirsher 1679874aeea5SJeff Kirsher /* Carry out hardware-type specific initialisation */ 1680874aeea5SJeff Kirsher rc = efx->type->probe(efx); 1681874aeea5SJeff Kirsher if (rc) 1682874aeea5SJeff Kirsher return rc; 1683874aeea5SJeff Kirsher 1684b0fbdae1SShradha Shah do { 1685b0fbdae1SShradha Shah if (!efx->max_channels || !efx->max_tx_channels) { 1686b0fbdae1SShradha Shah netif_err(efx, drv, efx->net_dev, 1687b0fbdae1SShradha Shah "Insufficient resources to allocate" 1688b0fbdae1SShradha Shah " any channels\n"); 1689b0fbdae1SShradha Shah rc = -ENOSPC; 1690b0fbdae1SShradha Shah goto fail1; 1691b0fbdae1SShradha Shah } 1692b0fbdae1SShradha Shah 1693b0fbdae1SShradha Shah /* Determine the number of channels and queues by trying 1694b0fbdae1SShradha Shah * to hook in MSI-X interrupts. 1695b0fbdae1SShradha Shah */ 1696874aeea5SJeff Kirsher rc = efx_probe_interrupts(efx); 1697874aeea5SJeff Kirsher if (rc) 1698c15eed22SBen Hutchings goto fail1; 1699874aeea5SJeff Kirsher 170052ad762bSDaniel Pieczko efx_set_channels(efx); 170152ad762bSDaniel Pieczko 1702b0fbdae1SShradha Shah /* dimension_resources can fail with EAGAIN */ 1703c15eed22SBen Hutchings rc = efx->type->dimension_resources(efx); 1704b0fbdae1SShradha Shah if (rc != 0 && rc != -EAGAIN) 1705c15eed22SBen Hutchings goto fail2; 170628e47c49SBen Hutchings 1707b0fbdae1SShradha Shah if (rc == -EAGAIN) 1708b0fbdae1SShradha Shah /* try again with new max_channels */ 1709b0fbdae1SShradha Shah efx_remove_interrupts(efx); 1710b0fbdae1SShradha Shah 1711b0fbdae1SShradha Shah } while (rc == -EAGAIN); 1712b0fbdae1SShradha Shah 1713874aeea5SJeff Kirsher if (efx->n_channels > 1) 1714267c0157SJon Cooper netdev_rss_key_fill(&efx->rx_hash_key, 1715267c0157SJon Cooper sizeof(efx->rx_hash_key)); 1716267c0157SJon Cooper efx_set_default_rx_indir_table(efx); 1717874aeea5SJeff Kirsher 1718874aeea5SJeff Kirsher netif_set_real_num_tx_queues(efx->net_dev, efx->n_tx_channels); 1719874aeea5SJeff Kirsher netif_set_real_num_rx_queues(efx->net_dev, efx->n_rx_channels); 1720874aeea5SJeff Kirsher 1721874aeea5SJeff Kirsher /* Initialise the interrupt moderation settings */ 1722539de7c5SBert Kenward efx->irq_mod_step_us = DIV_ROUND_UP(efx->timer_quantum_ns, 1000); 17239e393b30SBen Hutchings efx_init_irq_moderation(efx, tx_irq_mod_usec, rx_irq_mod_usec, true, 17249e393b30SBen Hutchings true); 1725874aeea5SJeff Kirsher 1726874aeea5SJeff Kirsher return 0; 1727874aeea5SJeff Kirsher 1728c15eed22SBen Hutchings fail2: 1729c15eed22SBen Hutchings efx_remove_interrupts(efx); 1730c15eed22SBen Hutchings fail1: 1731874aeea5SJeff Kirsher efx->type->remove(efx); 1732874aeea5SJeff Kirsher return rc; 1733874aeea5SJeff Kirsher } 1734874aeea5SJeff Kirsher 1735874aeea5SJeff Kirsher static void efx_remove_nic(struct efx_nic *efx) 1736874aeea5SJeff Kirsher { 1737874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "destroying NIC\n"); 1738874aeea5SJeff Kirsher 1739874aeea5SJeff Kirsher efx_remove_interrupts(efx); 1740874aeea5SJeff Kirsher efx->type->remove(efx); 1741874aeea5SJeff Kirsher } 1742874aeea5SJeff Kirsher 1743add72477SBen Hutchings static int efx_probe_filters(struct efx_nic *efx) 1744add72477SBen Hutchings { 1745add72477SBen Hutchings int rc; 1746add72477SBen Hutchings 1747add72477SBen Hutchings spin_lock_init(&efx->filter_lock); 17480d322413SEdward Cree init_rwsem(&efx->filter_sem); 1749d248953aSMartin Habets mutex_lock(&efx->mac_lock); 17500d322413SEdward Cree down_write(&efx->filter_sem); 1751add72477SBen Hutchings rc = efx->type->filter_table_probe(efx); 1752add72477SBen Hutchings if (rc) 17530d322413SEdward Cree goto out_unlock; 1754add72477SBen Hutchings 1755add72477SBen Hutchings #ifdef CONFIG_RFS_ACCEL 1756add72477SBen Hutchings if (efx->type->offload_features & NETIF_F_NTUPLE) { 1757faf8dcc1SJon Cooper struct efx_channel *channel; 1758faf8dcc1SJon Cooper int i, success = 1; 1759faf8dcc1SJon Cooper 1760faf8dcc1SJon Cooper efx_for_each_channel(channel, efx) { 1761faf8dcc1SJon Cooper channel->rps_flow_id = 1762faf8dcc1SJon Cooper kcalloc(efx->type->max_rx_ip_filters, 1763faf8dcc1SJon Cooper sizeof(*channel->rps_flow_id), 1764add72477SBen Hutchings GFP_KERNEL); 1765faf8dcc1SJon Cooper if (!channel->rps_flow_id) 1766faf8dcc1SJon Cooper success = 0; 1767faf8dcc1SJon Cooper else 1768faf8dcc1SJon Cooper for (i = 0; 1769faf8dcc1SJon Cooper i < efx->type->max_rx_ip_filters; 1770faf8dcc1SJon Cooper ++i) 1771faf8dcc1SJon Cooper channel->rps_flow_id[i] = 1772faf8dcc1SJon Cooper RPS_FLOW_ID_INVALID; 1773faf8dcc1SJon Cooper } 1774faf8dcc1SJon Cooper 1775faf8dcc1SJon Cooper if (!success) { 1776faf8dcc1SJon Cooper efx_for_each_channel(channel, efx) 1777faf8dcc1SJon Cooper kfree(channel->rps_flow_id); 1778add72477SBen Hutchings efx->type->filter_table_remove(efx); 17790d322413SEdward Cree rc = -ENOMEM; 17800d322413SEdward Cree goto out_unlock; 1781add72477SBen Hutchings } 1782faf8dcc1SJon Cooper 1783faf8dcc1SJon Cooper efx->rps_expire_index = efx->rps_expire_channel = 0; 1784add72477SBen Hutchings } 1785add72477SBen Hutchings #endif 17860d322413SEdward Cree out_unlock: 17870d322413SEdward Cree up_write(&efx->filter_sem); 1788d248953aSMartin Habets mutex_unlock(&efx->mac_lock); 17890d322413SEdward Cree return rc; 1790add72477SBen Hutchings } 1791add72477SBen Hutchings 1792add72477SBen Hutchings static void efx_remove_filters(struct efx_nic *efx) 1793add72477SBen Hutchings { 1794add72477SBen Hutchings #ifdef CONFIG_RFS_ACCEL 1795faf8dcc1SJon Cooper struct efx_channel *channel; 1796faf8dcc1SJon Cooper 1797faf8dcc1SJon Cooper efx_for_each_channel(channel, efx) 1798faf8dcc1SJon Cooper kfree(channel->rps_flow_id); 1799add72477SBen Hutchings #endif 18000d322413SEdward Cree down_write(&efx->filter_sem); 1801add72477SBen Hutchings efx->type->filter_table_remove(efx); 18020d322413SEdward Cree up_write(&efx->filter_sem); 1803add72477SBen Hutchings } 1804add72477SBen Hutchings 1805add72477SBen Hutchings static void efx_restore_filters(struct efx_nic *efx) 1806add72477SBen Hutchings { 18070d322413SEdward Cree down_read(&efx->filter_sem); 1808add72477SBen Hutchings efx->type->filter_table_restore(efx); 18090d322413SEdward Cree up_read(&efx->filter_sem); 1810add72477SBen Hutchings } 1811add72477SBen Hutchings 1812874aeea5SJeff Kirsher /************************************************************************** 1813874aeea5SJeff Kirsher * 1814874aeea5SJeff Kirsher * NIC startup/shutdown 1815874aeea5SJeff Kirsher * 1816874aeea5SJeff Kirsher *************************************************************************/ 1817874aeea5SJeff Kirsher 1818874aeea5SJeff Kirsher static int efx_probe_all(struct efx_nic *efx) 1819874aeea5SJeff Kirsher { 1820874aeea5SJeff Kirsher int rc; 1821874aeea5SJeff Kirsher 1822874aeea5SJeff Kirsher rc = efx_probe_nic(efx); 1823874aeea5SJeff Kirsher if (rc) { 1824874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, "failed to create NIC\n"); 1825874aeea5SJeff Kirsher goto fail1; 1826874aeea5SJeff Kirsher } 1827874aeea5SJeff Kirsher 1828874aeea5SJeff Kirsher rc = efx_probe_port(efx); 1829874aeea5SJeff Kirsher if (rc) { 1830874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, "failed to create port\n"); 1831874aeea5SJeff Kirsher goto fail2; 1832874aeea5SJeff Kirsher } 1833874aeea5SJeff Kirsher 18347e6d06f0SBen Hutchings BUILD_BUG_ON(EFX_DEFAULT_DMAQ_SIZE < EFX_RXQ_MIN_ENT); 18357e6d06f0SBen Hutchings if (WARN_ON(EFX_DEFAULT_DMAQ_SIZE < EFX_TXQ_MIN_ENT(efx))) { 18367e6d06f0SBen Hutchings rc = -EINVAL; 18377e6d06f0SBen Hutchings goto fail3; 18387e6d06f0SBen Hutchings } 1839874aeea5SJeff Kirsher efx->rxq_entries = efx->txq_entries = EFX_DEFAULT_DMAQ_SIZE; 1840874aeea5SJeff Kirsher 18416d8aaaf6SDaniel Pieczko #ifdef CONFIG_SFC_SRIOV 18426d8aaaf6SDaniel Pieczko rc = efx->type->vswitching_probe(efx); 18436d8aaaf6SDaniel Pieczko if (rc) /* not fatal; the PF will still work fine */ 18446d8aaaf6SDaniel Pieczko netif_warn(efx, probe, efx->net_dev, 18456d8aaaf6SDaniel Pieczko "failed to setup vswitching rc=%d;" 18466d8aaaf6SDaniel Pieczko " VFs may not function\n", rc); 18476d8aaaf6SDaniel Pieczko #endif 18486d8aaaf6SDaniel Pieczko 1849874aeea5SJeff Kirsher rc = efx_probe_filters(efx); 1850874aeea5SJeff Kirsher if (rc) { 1851874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 1852874aeea5SJeff Kirsher "failed to create filter tables\n"); 18536d8aaaf6SDaniel Pieczko goto fail4; 1854874aeea5SJeff Kirsher } 1855874aeea5SJeff Kirsher 18567f967c01SBen Hutchings rc = efx_probe_channels(efx); 18577f967c01SBen Hutchings if (rc) 18586d8aaaf6SDaniel Pieczko goto fail5; 18597f967c01SBen Hutchings 1860874aeea5SJeff Kirsher return 0; 1861874aeea5SJeff Kirsher 18626d8aaaf6SDaniel Pieczko fail5: 18637f967c01SBen Hutchings efx_remove_filters(efx); 18646d8aaaf6SDaniel Pieczko fail4: 18656d8aaaf6SDaniel Pieczko #ifdef CONFIG_SFC_SRIOV 18666d8aaaf6SDaniel Pieczko efx->type->vswitching_remove(efx); 18676d8aaaf6SDaniel Pieczko #endif 1868874aeea5SJeff Kirsher fail3: 1869874aeea5SJeff Kirsher efx_remove_port(efx); 1870874aeea5SJeff Kirsher fail2: 1871874aeea5SJeff Kirsher efx_remove_nic(efx); 1872874aeea5SJeff Kirsher fail1: 1873874aeea5SJeff Kirsher return rc; 1874874aeea5SJeff Kirsher } 1875874aeea5SJeff Kirsher 18768b7325b4SBen Hutchings /* If the interface is supposed to be running but is not, start 18778b7325b4SBen Hutchings * the hardware and software data path, regular activity for the port 18788b7325b4SBen Hutchings * (MAC statistics, link polling, etc.) and schedule the port to be 18798b7325b4SBen Hutchings * reconfigured. Interrupts must already be enabled. This function 18808b7325b4SBen Hutchings * is safe to call multiple times, so long as the NIC is not disabled. 18818b7325b4SBen Hutchings * Requires the RTNL lock. 18829f2cb71cSBen Hutchings */ 1883874aeea5SJeff Kirsher static void efx_start_all(struct efx_nic *efx) 1884874aeea5SJeff Kirsher { 1885874aeea5SJeff Kirsher EFX_ASSERT_RESET_SERIALISED(efx); 18868b7325b4SBen Hutchings BUG_ON(efx->state == STATE_DISABLED); 1887874aeea5SJeff Kirsher 1888874aeea5SJeff Kirsher /* Check that it is appropriate to restart the interface. All 1889874aeea5SJeff Kirsher * of these flags are safe to read under just the rtnl lock */ 1890e283546cSEdward Cree if (efx->port_enabled || !netif_running(efx->net_dev) || 1891e283546cSEdward Cree efx->reset_pending) 1892874aeea5SJeff Kirsher return; 1893874aeea5SJeff Kirsher 1894874aeea5SJeff Kirsher efx_start_port(efx); 18959f2cb71cSBen Hutchings efx_start_datapath(efx); 1896874aeea5SJeff Kirsher 1897626950dbSAlexandre Rames /* Start the hardware monitor if there is one */ 1898626950dbSAlexandre Rames if (efx->type->monitor != NULL) 1899874aeea5SJeff Kirsher queue_delayed_work(efx->workqueue, &efx->monitor_work, 1900874aeea5SJeff Kirsher efx_monitor_interval); 1901626950dbSAlexandre Rames 19025a6681e2SEdward Cree /* Link state detection is normally event-driven; we have 1903626950dbSAlexandre Rames * to poll now because we could have missed a change 1904626950dbSAlexandre Rames */ 1905874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 1906874aeea5SJeff Kirsher if (efx->phy_op->poll(efx)) 1907874aeea5SJeff Kirsher efx_link_status_changed(efx); 1908874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 1909874aeea5SJeff Kirsher 1910874aeea5SJeff Kirsher efx->type->start_stats(efx); 1911f8f3b5aeSJon Cooper efx->type->pull_stats(efx); 1912f8f3b5aeSJon Cooper spin_lock_bh(&efx->stats_lock); 1913f8f3b5aeSJon Cooper efx->type->update_stats(efx, NULL, NULL); 1914f8f3b5aeSJon Cooper spin_unlock_bh(&efx->stats_lock); 1915874aeea5SJeff Kirsher } 1916874aeea5SJeff Kirsher 19178b7325b4SBen Hutchings /* Quiesce the hardware and software data path, and regular activity 19188b7325b4SBen Hutchings * for the port without bringing the link down. Safe to call multiple 19198b7325b4SBen Hutchings * times with the NIC in almost any state, but interrupts should be 19208b7325b4SBen Hutchings * enabled. Requires the RTNL lock. 19218b7325b4SBen Hutchings */ 1922874aeea5SJeff Kirsher static void efx_stop_all(struct efx_nic *efx) 1923874aeea5SJeff Kirsher { 1924874aeea5SJeff Kirsher EFX_ASSERT_RESET_SERIALISED(efx); 1925874aeea5SJeff Kirsher 1926874aeea5SJeff Kirsher /* port_enabled can be read safely under the rtnl lock */ 1927874aeea5SJeff Kirsher if (!efx->port_enabled) 1928874aeea5SJeff Kirsher return; 1929874aeea5SJeff Kirsher 1930f8f3b5aeSJon Cooper /* update stats before we go down so we can accurately count 1931f8f3b5aeSJon Cooper * rx_nodesc_drops 1932f8f3b5aeSJon Cooper */ 1933f8f3b5aeSJon Cooper efx->type->pull_stats(efx); 1934f8f3b5aeSJon Cooper spin_lock_bh(&efx->stats_lock); 1935f8f3b5aeSJon Cooper efx->type->update_stats(efx, NULL, NULL); 1936f8f3b5aeSJon Cooper spin_unlock_bh(&efx->stats_lock); 1937874aeea5SJeff Kirsher efx->type->stop_stats(efx); 1938874aeea5SJeff Kirsher efx_stop_port(efx); 1939874aeea5SJeff Kirsher 194029c69a48SBen Hutchings /* Stop the kernel transmit interface. This is only valid if 194129c69a48SBen Hutchings * the device is stopped or detached; otherwise the watchdog 194229c69a48SBen Hutchings * may fire immediately. 194329c69a48SBen Hutchings */ 194429c69a48SBen Hutchings WARN_ON(netif_running(efx->net_dev) && 194529c69a48SBen Hutchings netif_device_present(efx->net_dev)); 19469f2cb71cSBen Hutchings netif_tx_disable(efx->net_dev); 19479f2cb71cSBen Hutchings 19489f2cb71cSBen Hutchings efx_stop_datapath(efx); 1949874aeea5SJeff Kirsher } 1950874aeea5SJeff Kirsher 1951874aeea5SJeff Kirsher static void efx_remove_all(struct efx_nic *efx) 1952874aeea5SJeff Kirsher { 1953874aeea5SJeff Kirsher efx_remove_channels(efx); 19547f967c01SBen Hutchings efx_remove_filters(efx); 19556d8aaaf6SDaniel Pieczko #ifdef CONFIG_SFC_SRIOV 19566d8aaaf6SDaniel Pieczko efx->type->vswitching_remove(efx); 19576d8aaaf6SDaniel Pieczko #endif 1958874aeea5SJeff Kirsher efx_remove_port(efx); 1959874aeea5SJeff Kirsher efx_remove_nic(efx); 1960874aeea5SJeff Kirsher } 1961874aeea5SJeff Kirsher 1962874aeea5SJeff Kirsher /************************************************************************** 1963874aeea5SJeff Kirsher * 1964874aeea5SJeff Kirsher * Interrupt moderation 1965874aeea5SJeff Kirsher * 1966874aeea5SJeff Kirsher **************************************************************************/ 1967539de7c5SBert Kenward unsigned int efx_usecs_to_ticks(struct efx_nic *efx, unsigned int usecs) 1968874aeea5SJeff Kirsher { 1969b548f976SBen Hutchings if (usecs == 0) 1970b548f976SBen Hutchings return 0; 1971539de7c5SBert Kenward if (usecs * 1000 < efx->timer_quantum_ns) 1972874aeea5SJeff Kirsher return 1; /* never round down to 0 */ 1973539de7c5SBert Kenward return usecs * 1000 / efx->timer_quantum_ns; 1974539de7c5SBert Kenward } 1975539de7c5SBert Kenward 1976539de7c5SBert Kenward unsigned int efx_ticks_to_usecs(struct efx_nic *efx, unsigned int ticks) 1977539de7c5SBert Kenward { 1978539de7c5SBert Kenward /* We must round up when converting ticks to microseconds 1979539de7c5SBert Kenward * because we round down when converting the other way. 1980539de7c5SBert Kenward */ 1981539de7c5SBert Kenward return DIV_ROUND_UP(ticks * efx->timer_quantum_ns, 1000); 1982874aeea5SJeff Kirsher } 1983874aeea5SJeff Kirsher 1984874aeea5SJeff Kirsher /* Set interrupt moderation parameters */ 19859e393b30SBen Hutchings int efx_init_irq_moderation(struct efx_nic *efx, unsigned int tx_usecs, 19869e393b30SBen Hutchings unsigned int rx_usecs, bool rx_adaptive, 19879e393b30SBen Hutchings bool rx_may_override_tx) 1988874aeea5SJeff Kirsher { 1989874aeea5SJeff Kirsher struct efx_channel *channel; 1990d95e329aSBert Kenward unsigned int timer_max_us; 1991d95e329aSBert Kenward 1992874aeea5SJeff Kirsher EFX_ASSERT_RESET_SERIALISED(efx); 1993874aeea5SJeff Kirsher 1994d95e329aSBert Kenward timer_max_us = efx->timer_max_ns / 1000; 1995d95e329aSBert Kenward 1996d95e329aSBert Kenward if (tx_usecs > timer_max_us || rx_usecs > timer_max_us) 19979e393b30SBen Hutchings return -EINVAL; 19989e393b30SBen Hutchings 1999539de7c5SBert Kenward if (tx_usecs != rx_usecs && efx->tx_channel_offset == 0 && 20009e393b30SBen Hutchings !rx_may_override_tx) { 20019e393b30SBen Hutchings netif_err(efx, drv, efx->net_dev, "Channels are shared. " 20029e393b30SBen Hutchings "RX and TX IRQ moderation must be equal\n"); 20039e393b30SBen Hutchings return -EINVAL; 20049e393b30SBen Hutchings } 20059e393b30SBen Hutchings 2006874aeea5SJeff Kirsher efx->irq_rx_adaptive = rx_adaptive; 2007539de7c5SBert Kenward efx->irq_rx_moderation_us = rx_usecs; 2008874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) { 2009874aeea5SJeff Kirsher if (efx_channel_has_rx_queue(channel)) 2010539de7c5SBert Kenward channel->irq_moderation_us = rx_usecs; 2011874aeea5SJeff Kirsher else if (efx_channel_has_tx_queues(channel)) 2012539de7c5SBert Kenward channel->irq_moderation_us = tx_usecs; 2013874aeea5SJeff Kirsher } 20149e393b30SBen Hutchings 20159e393b30SBen Hutchings return 0; 2016874aeea5SJeff Kirsher } 2017874aeea5SJeff Kirsher 2018a0c4faf5SBen Hutchings void efx_get_irq_moderation(struct efx_nic *efx, unsigned int *tx_usecs, 2019a0c4faf5SBen Hutchings unsigned int *rx_usecs, bool *rx_adaptive) 2020a0c4faf5SBen Hutchings { 2021a0c4faf5SBen Hutchings *rx_adaptive = efx->irq_rx_adaptive; 2022539de7c5SBert Kenward *rx_usecs = efx->irq_rx_moderation_us; 2023a0c4faf5SBen Hutchings 2024a0c4faf5SBen Hutchings /* If channels are shared between RX and TX, so is IRQ 2025a0c4faf5SBen Hutchings * moderation. Otherwise, IRQ moderation is the same for all 2026a0c4faf5SBen Hutchings * TX channels and is not adaptive. 2027a0c4faf5SBen Hutchings */ 2028539de7c5SBert Kenward if (efx->tx_channel_offset == 0) { 2029a0c4faf5SBen Hutchings *tx_usecs = *rx_usecs; 2030539de7c5SBert Kenward } else { 2031539de7c5SBert Kenward struct efx_channel *tx_channel; 2032539de7c5SBert Kenward 2033539de7c5SBert Kenward tx_channel = efx->channel[efx->tx_channel_offset]; 2034539de7c5SBert Kenward *tx_usecs = tx_channel->irq_moderation_us; 2035539de7c5SBert Kenward } 2036a0c4faf5SBen Hutchings } 2037a0c4faf5SBen Hutchings 2038874aeea5SJeff Kirsher /************************************************************************** 2039874aeea5SJeff Kirsher * 2040874aeea5SJeff Kirsher * Hardware monitor 2041874aeea5SJeff Kirsher * 2042874aeea5SJeff Kirsher **************************************************************************/ 2043874aeea5SJeff Kirsher 2044874aeea5SJeff Kirsher /* Run periodically off the general workqueue */ 2045874aeea5SJeff Kirsher static void efx_monitor(struct work_struct *data) 2046874aeea5SJeff Kirsher { 2047874aeea5SJeff Kirsher struct efx_nic *efx = container_of(data, struct efx_nic, 2048874aeea5SJeff Kirsher monitor_work.work); 2049874aeea5SJeff Kirsher 2050874aeea5SJeff Kirsher netif_vdbg(efx, timer, efx->net_dev, 2051874aeea5SJeff Kirsher "hardware monitor executing on CPU %d\n", 2052874aeea5SJeff Kirsher raw_smp_processor_id()); 2053874aeea5SJeff Kirsher BUG_ON(efx->type->monitor == NULL); 2054874aeea5SJeff Kirsher 2055874aeea5SJeff Kirsher /* If the mac_lock is already held then it is likely a port 2056874aeea5SJeff Kirsher * reconfiguration is already in place, which will likely do 2057874aeea5SJeff Kirsher * most of the work of monitor() anyway. */ 2058874aeea5SJeff Kirsher if (mutex_trylock(&efx->mac_lock)) { 2059874aeea5SJeff Kirsher if (efx->port_enabled) 2060874aeea5SJeff Kirsher efx->type->monitor(efx); 2061874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 2062874aeea5SJeff Kirsher } 2063874aeea5SJeff Kirsher 2064874aeea5SJeff Kirsher queue_delayed_work(efx->workqueue, &efx->monitor_work, 2065874aeea5SJeff Kirsher efx_monitor_interval); 2066874aeea5SJeff Kirsher } 2067874aeea5SJeff Kirsher 2068874aeea5SJeff Kirsher /************************************************************************** 2069874aeea5SJeff Kirsher * 2070874aeea5SJeff Kirsher * ioctls 2071874aeea5SJeff Kirsher * 2072874aeea5SJeff Kirsher *************************************************************************/ 2073874aeea5SJeff Kirsher 2074874aeea5SJeff Kirsher /* Net device ioctl 2075874aeea5SJeff Kirsher * Context: process, rtnl_lock() held. 2076874aeea5SJeff Kirsher */ 2077874aeea5SJeff Kirsher static int efx_ioctl(struct net_device *net_dev, struct ifreq *ifr, int cmd) 2078874aeea5SJeff Kirsher { 2079874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 2080874aeea5SJeff Kirsher struct mii_ioctl_data *data = if_mii(ifr); 2081874aeea5SJeff Kirsher 20827c236c43SStuart Hodgson if (cmd == SIOCSHWTSTAMP) 2083433dc9b3SBen Hutchings return efx_ptp_set_ts_config(efx, ifr); 2084433dc9b3SBen Hutchings if (cmd == SIOCGHWTSTAMP) 2085433dc9b3SBen Hutchings return efx_ptp_get_ts_config(efx, ifr); 20867c236c43SStuart Hodgson 2087874aeea5SJeff Kirsher /* Convert phy_id from older PRTAD/DEVAD format */ 2088874aeea5SJeff Kirsher if ((cmd == SIOCGMIIREG || cmd == SIOCSMIIREG) && 2089874aeea5SJeff Kirsher (data->phy_id & 0xfc00) == 0x0400) 2090874aeea5SJeff Kirsher data->phy_id ^= MDIO_PHY_ID_C45 | 0x0400; 2091874aeea5SJeff Kirsher 2092874aeea5SJeff Kirsher return mdio_mii_ioctl(&efx->mdio, data, cmd); 2093874aeea5SJeff Kirsher } 2094874aeea5SJeff Kirsher 2095874aeea5SJeff Kirsher /************************************************************************** 2096874aeea5SJeff Kirsher * 2097874aeea5SJeff Kirsher * NAPI interface 2098874aeea5SJeff Kirsher * 2099874aeea5SJeff Kirsher **************************************************************************/ 2100874aeea5SJeff Kirsher 21017f967c01SBen Hutchings static void efx_init_napi_channel(struct efx_channel *channel) 2102874aeea5SJeff Kirsher { 21037f967c01SBen Hutchings struct efx_nic *efx = channel->efx; 2104874aeea5SJeff Kirsher 2105874aeea5SJeff Kirsher channel->napi_dev = efx->net_dev; 2106874aeea5SJeff Kirsher netif_napi_add(channel->napi_dev, &channel->napi_str, 2107874aeea5SJeff Kirsher efx_poll, napi_weight); 2108874aeea5SJeff Kirsher } 21097f967c01SBen Hutchings 21107f967c01SBen Hutchings static void efx_init_napi(struct efx_nic *efx) 21117f967c01SBen Hutchings { 21127f967c01SBen Hutchings struct efx_channel *channel; 21137f967c01SBen Hutchings 21147f967c01SBen Hutchings efx_for_each_channel(channel, efx) 21157f967c01SBen Hutchings efx_init_napi_channel(channel); 2116874aeea5SJeff Kirsher } 2117874aeea5SJeff Kirsher 2118874aeea5SJeff Kirsher static void efx_fini_napi_channel(struct efx_channel *channel) 2119874aeea5SJeff Kirsher { 2120973334a1SEric Dumazet if (channel->napi_dev) 2121874aeea5SJeff Kirsher netif_napi_del(&channel->napi_str); 2122973334a1SEric Dumazet 2123874aeea5SJeff Kirsher channel->napi_dev = NULL; 2124874aeea5SJeff Kirsher } 2125874aeea5SJeff Kirsher 2126874aeea5SJeff Kirsher static void efx_fini_napi(struct efx_nic *efx) 2127874aeea5SJeff Kirsher { 2128874aeea5SJeff Kirsher struct efx_channel *channel; 2129874aeea5SJeff Kirsher 2130874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) 2131874aeea5SJeff Kirsher efx_fini_napi_channel(channel); 2132874aeea5SJeff Kirsher } 2133874aeea5SJeff Kirsher 2134874aeea5SJeff Kirsher /************************************************************************** 2135874aeea5SJeff Kirsher * 2136874aeea5SJeff Kirsher * Kernel netpoll interface 2137874aeea5SJeff Kirsher * 2138874aeea5SJeff Kirsher *************************************************************************/ 2139874aeea5SJeff Kirsher 2140874aeea5SJeff Kirsher #ifdef CONFIG_NET_POLL_CONTROLLER 2141874aeea5SJeff Kirsher 2142874aeea5SJeff Kirsher /* Although in the common case interrupts will be disabled, this is not 2143874aeea5SJeff Kirsher * guaranteed. However, all our work happens inside the NAPI callback, 2144874aeea5SJeff Kirsher * so no locking is required. 2145874aeea5SJeff Kirsher */ 2146874aeea5SJeff Kirsher static void efx_netpoll(struct net_device *net_dev) 2147874aeea5SJeff Kirsher { 2148874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 2149874aeea5SJeff Kirsher struct efx_channel *channel; 2150874aeea5SJeff Kirsher 2151874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) 2152874aeea5SJeff Kirsher efx_schedule_channel(channel); 2153874aeea5SJeff Kirsher } 2154874aeea5SJeff Kirsher 2155874aeea5SJeff Kirsher #endif 2156874aeea5SJeff Kirsher 2157874aeea5SJeff Kirsher /************************************************************************** 2158874aeea5SJeff Kirsher * 2159874aeea5SJeff Kirsher * Kernel net device interface 2160874aeea5SJeff Kirsher * 2161874aeea5SJeff Kirsher *************************************************************************/ 2162874aeea5SJeff Kirsher 2163874aeea5SJeff Kirsher /* Context: process, rtnl_lock() held. */ 2164e340be92SShradha Shah int efx_net_open(struct net_device *net_dev) 2165874aeea5SJeff Kirsher { 2166874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 21678b7325b4SBen Hutchings int rc; 21688b7325b4SBen Hutchings 2169874aeea5SJeff Kirsher netif_dbg(efx, ifup, efx->net_dev, "opening device on CPU %d\n", 2170874aeea5SJeff Kirsher raw_smp_processor_id()); 2171874aeea5SJeff Kirsher 21728b7325b4SBen Hutchings rc = efx_check_disabled(efx); 21738b7325b4SBen Hutchings if (rc) 21748b7325b4SBen Hutchings return rc; 2175874aeea5SJeff Kirsher if (efx->phy_mode & PHY_MODE_SPECIAL) 2176874aeea5SJeff Kirsher return -EBUSY; 2177874aeea5SJeff Kirsher if (efx_mcdi_poll_reboot(efx) && efx_reset(efx, RESET_TYPE_ALL)) 2178874aeea5SJeff Kirsher return -EIO; 2179874aeea5SJeff Kirsher 2180874aeea5SJeff Kirsher /* Notify the kernel of the link state polled during driver load, 2181874aeea5SJeff Kirsher * before the monitor starts running */ 2182874aeea5SJeff Kirsher efx_link_status_changed(efx); 2183874aeea5SJeff Kirsher 2184874aeea5SJeff Kirsher efx_start_all(efx); 21859c568fd8SPeter Dunning if (efx->state == STATE_DISABLED || efx->reset_pending) 21869c568fd8SPeter Dunning netif_device_detach(efx->net_dev); 2187dd40781eSBen Hutchings efx_selftest_async_start(efx); 2188874aeea5SJeff Kirsher return 0; 2189874aeea5SJeff Kirsher } 2190874aeea5SJeff Kirsher 2191874aeea5SJeff Kirsher /* Context: process, rtnl_lock() held. 2192874aeea5SJeff Kirsher * Note that the kernel will ignore our return code; this method 2193874aeea5SJeff Kirsher * should really be a void. 2194874aeea5SJeff Kirsher */ 2195e340be92SShradha Shah int efx_net_stop(struct net_device *net_dev) 2196874aeea5SJeff Kirsher { 2197874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 2198874aeea5SJeff Kirsher 2199874aeea5SJeff Kirsher netif_dbg(efx, ifdown, efx->net_dev, "closing on CPU %d\n", 2200874aeea5SJeff Kirsher raw_smp_processor_id()); 2201874aeea5SJeff Kirsher 2202874aeea5SJeff Kirsher /* Stop the device and flush all the channels */ 2203874aeea5SJeff Kirsher efx_stop_all(efx); 2204874aeea5SJeff Kirsher 2205874aeea5SJeff Kirsher return 0; 2206874aeea5SJeff Kirsher } 2207874aeea5SJeff Kirsher 2208874aeea5SJeff Kirsher /* Context: process, dev_base_lock or RTNL held, non-blocking. */ 2209bc1f4470Sstephen hemminger static void efx_net_stats(struct net_device *net_dev, 22102aa9ef11SBen Hutchings struct rtnl_link_stats64 *stats) 2211874aeea5SJeff Kirsher { 2212874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 2213874aeea5SJeff Kirsher 2214874aeea5SJeff Kirsher spin_lock_bh(&efx->stats_lock); 2215cd0ecc9aSBen Hutchings efx->type->update_stats(efx, NULL, stats); 22161cb34522SBen Hutchings spin_unlock_bh(&efx->stats_lock); 2217874aeea5SJeff Kirsher } 2218874aeea5SJeff Kirsher 2219874aeea5SJeff Kirsher /* Context: netif_tx_lock held, BHs disabled. */ 2220874aeea5SJeff Kirsher static void efx_watchdog(struct net_device *net_dev) 2221874aeea5SJeff Kirsher { 2222874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 2223874aeea5SJeff Kirsher 2224874aeea5SJeff Kirsher netif_err(efx, tx_err, efx->net_dev, 2225874aeea5SJeff Kirsher "TX stuck with port_enabled=%d: resetting channels\n", 2226874aeea5SJeff Kirsher efx->port_enabled); 2227874aeea5SJeff Kirsher 2228874aeea5SJeff Kirsher efx_schedule_reset(efx, RESET_TYPE_TX_WATCHDOG); 2229874aeea5SJeff Kirsher } 2230874aeea5SJeff Kirsher 2231874aeea5SJeff Kirsher 2232874aeea5SJeff Kirsher /* Context: process, rtnl_lock() held. */ 2233874aeea5SJeff Kirsher static int efx_change_mtu(struct net_device *net_dev, int new_mtu) 2234874aeea5SJeff Kirsher { 2235874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 22368b7325b4SBen Hutchings int rc; 2237874aeea5SJeff Kirsher 22388b7325b4SBen Hutchings rc = efx_check_disabled(efx); 22398b7325b4SBen Hutchings if (rc) 22408b7325b4SBen Hutchings return rc; 2241874aeea5SJeff Kirsher 2242874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "changing MTU to %d\n", new_mtu); 2243874aeea5SJeff Kirsher 224429c69a48SBen Hutchings efx_device_detach_sync(efx); 224529c69a48SBen Hutchings efx_stop_all(efx); 224629c69a48SBen Hutchings 2247874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 2248874aeea5SJeff Kirsher net_dev->mtu = new_mtu; 22490d322413SEdward Cree efx_mac_reconfigure(efx); 2250874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 2251874aeea5SJeff Kirsher 2252874aeea5SJeff Kirsher efx_start_all(efx); 22539c568fd8SPeter Dunning efx_device_attach_if_not_resetting(efx); 22546c8eef4aSBen Hutchings return 0; 2255874aeea5SJeff Kirsher } 2256874aeea5SJeff Kirsher 2257874aeea5SJeff Kirsher static int efx_set_mac_address(struct net_device *net_dev, void *data) 2258874aeea5SJeff Kirsher { 2259874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 2260874aeea5SJeff Kirsher struct sockaddr *addr = data; 2261e0b3ae30SBen Hutchings u8 *new_addr = addr->sa_data; 2262cfc77c2fSShradha Shah u8 old_addr[6]; 2263cfc77c2fSShradha Shah int rc; 2264874aeea5SJeff Kirsher 2265874aeea5SJeff Kirsher if (!is_valid_ether_addr(new_addr)) { 2266874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, 2267874aeea5SJeff Kirsher "invalid ethernet MAC address requested: %pM\n", 2268874aeea5SJeff Kirsher new_addr); 2269504f9b5aSDanny Kukawka return -EADDRNOTAVAIL; 2270874aeea5SJeff Kirsher } 2271874aeea5SJeff Kirsher 2272cfc77c2fSShradha Shah /* save old address */ 2273cfc77c2fSShradha Shah ether_addr_copy(old_addr, net_dev->dev_addr); 2274cd84ff4dSEdward Cree ether_addr_copy(net_dev->dev_addr, new_addr); 2275910c8789SShradha Shah if (efx->type->set_mac_address) { 2276910c8789SShradha Shah rc = efx->type->set_mac_address(efx); 2277cfc77c2fSShradha Shah if (rc) { 2278cfc77c2fSShradha Shah ether_addr_copy(net_dev->dev_addr, old_addr); 2279cfc77c2fSShradha Shah return rc; 2280cfc77c2fSShradha Shah } 2281cfc77c2fSShradha Shah } 2282874aeea5SJeff Kirsher 2283874aeea5SJeff Kirsher /* Reconfigure the MAC */ 2284874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 22850d322413SEdward Cree efx_mac_reconfigure(efx); 2286874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 2287874aeea5SJeff Kirsher 2288874aeea5SJeff Kirsher return 0; 2289874aeea5SJeff Kirsher } 2290874aeea5SJeff Kirsher 2291874aeea5SJeff Kirsher /* Context: netif_addr_lock held, BHs disabled. */ 22920fca8c97SBen Hutchings static void efx_set_rx_mode(struct net_device *net_dev) 2293874aeea5SJeff Kirsher { 2294874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 2295874aeea5SJeff Kirsher 2296874aeea5SJeff Kirsher if (efx->port_enabled) 2297874aeea5SJeff Kirsher queue_work(efx->workqueue, &efx->mac_work); 2298874aeea5SJeff Kirsher /* Otherwise efx_start_port() will do this */ 2299874aeea5SJeff Kirsher } 2300874aeea5SJeff Kirsher 2301c8f44affSMichał Mirosław static int efx_set_features(struct net_device *net_dev, netdev_features_t data) 2302874aeea5SJeff Kirsher { 2303874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 23044a53ea8aSAndrew Rybchenko int rc; 2305874aeea5SJeff Kirsher 2306874aeea5SJeff Kirsher /* If disabling RX n-tuple filtering, clear existing filters */ 23074a53ea8aSAndrew Rybchenko if (net_dev->features & ~data & NETIF_F_NTUPLE) { 23084a53ea8aSAndrew Rybchenko rc = efx->type->filter_clear_rx(efx, EFX_FILTER_PRI_MANUAL); 23094a53ea8aSAndrew Rybchenko if (rc) 23104a53ea8aSAndrew Rybchenko return rc; 23114a53ea8aSAndrew Rybchenko } 23124a53ea8aSAndrew Rybchenko 23134a53ea8aSAndrew Rybchenko /* If Rx VLAN filter is changed, update filters via mac_reconfigure */ 23144a53ea8aSAndrew Rybchenko if ((net_dev->features ^ data) & NETIF_F_HW_VLAN_CTAG_FILTER) { 23154a53ea8aSAndrew Rybchenko /* efx_set_rx_mode() will schedule MAC work to update filters 23164a53ea8aSAndrew Rybchenko * when a new features are finally set in net_dev. 23174a53ea8aSAndrew Rybchenko */ 23184a53ea8aSAndrew Rybchenko efx_set_rx_mode(net_dev); 23194a53ea8aSAndrew Rybchenko } 2320874aeea5SJeff Kirsher 2321874aeea5SJeff Kirsher return 0; 2322874aeea5SJeff Kirsher } 2323874aeea5SJeff Kirsher 2324b40296fcSWei Yongjun static int efx_get_phys_port_id(struct net_device *net_dev, 232508a7b29bSBert Kenward struct netdev_phys_item_id *ppid) 232608a7b29bSBert Kenward { 232708a7b29bSBert Kenward struct efx_nic *efx = netdev_priv(net_dev); 232808a7b29bSBert Kenward 232908a7b29bSBert Kenward if (efx->type->get_phys_port_id) 233008a7b29bSBert Kenward return efx->type->get_phys_port_id(efx, ppid); 233108a7b29bSBert Kenward else 233208a7b29bSBert Kenward return -EOPNOTSUPP; 233308a7b29bSBert Kenward } 233408a7b29bSBert Kenward 2335ac019f08SBert Kenward static int efx_get_phys_port_name(struct net_device *net_dev, 2336ac019f08SBert Kenward char *name, size_t len) 2337ac019f08SBert Kenward { 2338ac019f08SBert Kenward struct efx_nic *efx = netdev_priv(net_dev); 2339ac019f08SBert Kenward 2340ac019f08SBert Kenward if (snprintf(name, len, "p%u", efx->port_num) >= len) 2341ac019f08SBert Kenward return -EINVAL; 2342ac019f08SBert Kenward return 0; 2343ac019f08SBert Kenward } 2344ac019f08SBert Kenward 23454a53ea8aSAndrew Rybchenko static int efx_vlan_rx_add_vid(struct net_device *net_dev, __be16 proto, u16 vid) 23464a53ea8aSAndrew Rybchenko { 23474a53ea8aSAndrew Rybchenko struct efx_nic *efx = netdev_priv(net_dev); 23484a53ea8aSAndrew Rybchenko 23494a53ea8aSAndrew Rybchenko if (efx->type->vlan_rx_add_vid) 23504a53ea8aSAndrew Rybchenko return efx->type->vlan_rx_add_vid(efx, proto, vid); 23514a53ea8aSAndrew Rybchenko else 23524a53ea8aSAndrew Rybchenko return -EOPNOTSUPP; 23534a53ea8aSAndrew Rybchenko } 23544a53ea8aSAndrew Rybchenko 23554a53ea8aSAndrew Rybchenko static int efx_vlan_rx_kill_vid(struct net_device *net_dev, __be16 proto, u16 vid) 23564a53ea8aSAndrew Rybchenko { 23574a53ea8aSAndrew Rybchenko struct efx_nic *efx = netdev_priv(net_dev); 23584a53ea8aSAndrew Rybchenko 23594a53ea8aSAndrew Rybchenko if (efx->type->vlan_rx_kill_vid) 23604a53ea8aSAndrew Rybchenko return efx->type->vlan_rx_kill_vid(efx, proto, vid); 23614a53ea8aSAndrew Rybchenko else 23624a53ea8aSAndrew Rybchenko return -EOPNOTSUPP; 23634a53ea8aSAndrew Rybchenko } 23644a53ea8aSAndrew Rybchenko 2365e5fbd977SJon Cooper static int efx_udp_tunnel_type_map(enum udp_parsable_tunnel_type in) 2366e5fbd977SJon Cooper { 2367e5fbd977SJon Cooper switch (in) { 2368e5fbd977SJon Cooper case UDP_TUNNEL_TYPE_VXLAN: 2369e5fbd977SJon Cooper return TUNNEL_ENCAP_UDP_PORT_ENTRY_VXLAN; 2370e5fbd977SJon Cooper case UDP_TUNNEL_TYPE_GENEVE: 2371e5fbd977SJon Cooper return TUNNEL_ENCAP_UDP_PORT_ENTRY_GENEVE; 2372e5fbd977SJon Cooper default: 2373e5fbd977SJon Cooper return -1; 2374e5fbd977SJon Cooper } 2375e5fbd977SJon Cooper } 2376e5fbd977SJon Cooper 2377e5fbd977SJon Cooper static void efx_udp_tunnel_add(struct net_device *dev, struct udp_tunnel_info *ti) 2378e5fbd977SJon Cooper { 2379e5fbd977SJon Cooper struct efx_nic *efx = netdev_priv(dev); 2380e5fbd977SJon Cooper struct efx_udp_tunnel tnl; 2381e5fbd977SJon Cooper int efx_tunnel_type; 2382e5fbd977SJon Cooper 2383e5fbd977SJon Cooper efx_tunnel_type = efx_udp_tunnel_type_map(ti->type); 2384e5fbd977SJon Cooper if (efx_tunnel_type < 0) 2385e5fbd977SJon Cooper return; 2386e5fbd977SJon Cooper 2387e5fbd977SJon Cooper tnl.type = (u16)efx_tunnel_type; 2388e5fbd977SJon Cooper tnl.port = ti->port; 2389e5fbd977SJon Cooper 2390e5fbd977SJon Cooper if (efx->type->udp_tnl_add_port) 2391e5fbd977SJon Cooper (void)efx->type->udp_tnl_add_port(efx, tnl); 2392e5fbd977SJon Cooper } 2393e5fbd977SJon Cooper 2394e5fbd977SJon Cooper static void efx_udp_tunnel_del(struct net_device *dev, struct udp_tunnel_info *ti) 2395e5fbd977SJon Cooper { 2396e5fbd977SJon Cooper struct efx_nic *efx = netdev_priv(dev); 2397e5fbd977SJon Cooper struct efx_udp_tunnel tnl; 2398e5fbd977SJon Cooper int efx_tunnel_type; 2399e5fbd977SJon Cooper 2400e5fbd977SJon Cooper efx_tunnel_type = efx_udp_tunnel_type_map(ti->type); 2401e5fbd977SJon Cooper if (efx_tunnel_type < 0) 2402e5fbd977SJon Cooper return; 2403e5fbd977SJon Cooper 2404e5fbd977SJon Cooper tnl.type = (u16)efx_tunnel_type; 2405e5fbd977SJon Cooper tnl.port = ti->port; 2406e5fbd977SJon Cooper 2407c04ca616SDan Carpenter if (efx->type->udp_tnl_del_port) 2408e5fbd977SJon Cooper (void)efx->type->udp_tnl_del_port(efx, tnl); 2409e5fbd977SJon Cooper } 2410e5fbd977SJon Cooper 24117fa8d547SShradha Shah static const struct net_device_ops efx_netdev_ops = { 2412874aeea5SJeff Kirsher .ndo_open = efx_net_open, 2413874aeea5SJeff Kirsher .ndo_stop = efx_net_stop, 2414874aeea5SJeff Kirsher .ndo_get_stats64 = efx_net_stats, 2415874aeea5SJeff Kirsher .ndo_tx_timeout = efx_watchdog, 2416874aeea5SJeff Kirsher .ndo_start_xmit = efx_hard_start_xmit, 2417874aeea5SJeff Kirsher .ndo_validate_addr = eth_validate_addr, 2418874aeea5SJeff Kirsher .ndo_do_ioctl = efx_ioctl, 2419874aeea5SJeff Kirsher .ndo_change_mtu = efx_change_mtu, 2420874aeea5SJeff Kirsher .ndo_set_mac_address = efx_set_mac_address, 24210fca8c97SBen Hutchings .ndo_set_rx_mode = efx_set_rx_mode, 2422874aeea5SJeff Kirsher .ndo_set_features = efx_set_features, 24234a53ea8aSAndrew Rybchenko .ndo_vlan_rx_add_vid = efx_vlan_rx_add_vid, 24244a53ea8aSAndrew Rybchenko .ndo_vlan_rx_kill_vid = efx_vlan_rx_kill_vid, 2425cd2d5b52SBen Hutchings #ifdef CONFIG_SFC_SRIOV 24267fa8d547SShradha Shah .ndo_set_vf_mac = efx_sriov_set_vf_mac, 24277fa8d547SShradha Shah .ndo_set_vf_vlan = efx_sriov_set_vf_vlan, 24287fa8d547SShradha Shah .ndo_set_vf_spoofchk = efx_sriov_set_vf_spoofchk, 24297fa8d547SShradha Shah .ndo_get_vf_config = efx_sriov_get_vf_config, 24304392dc69SEdward Cree .ndo_set_vf_link_state = efx_sriov_set_vf_link_state, 2431cd2d5b52SBen Hutchings #endif 243208a7b29bSBert Kenward .ndo_get_phys_port_id = efx_get_phys_port_id, 2433ac019f08SBert Kenward .ndo_get_phys_port_name = efx_get_phys_port_name, 2434874aeea5SJeff Kirsher #ifdef CONFIG_NET_POLL_CONTROLLER 2435874aeea5SJeff Kirsher .ndo_poll_controller = efx_netpoll, 2436874aeea5SJeff Kirsher #endif 2437874aeea5SJeff Kirsher .ndo_setup_tc = efx_setup_tc, 2438874aeea5SJeff Kirsher #ifdef CONFIG_RFS_ACCEL 2439874aeea5SJeff Kirsher .ndo_rx_flow_steer = efx_filter_rfs, 2440874aeea5SJeff Kirsher #endif 2441e5fbd977SJon Cooper .ndo_udp_tunnel_add = efx_udp_tunnel_add, 2442e5fbd977SJon Cooper .ndo_udp_tunnel_del = efx_udp_tunnel_del, 2443874aeea5SJeff Kirsher }; 2444874aeea5SJeff Kirsher 2445874aeea5SJeff Kirsher static void efx_update_name(struct efx_nic *efx) 2446874aeea5SJeff Kirsher { 2447874aeea5SJeff Kirsher strcpy(efx->name, efx->net_dev->name); 2448874aeea5SJeff Kirsher efx_mtd_rename(efx); 2449874aeea5SJeff Kirsher efx_set_channel_names(efx); 2450874aeea5SJeff Kirsher } 2451874aeea5SJeff Kirsher 2452874aeea5SJeff Kirsher static int efx_netdev_event(struct notifier_block *this, 2453874aeea5SJeff Kirsher unsigned long event, void *ptr) 2454874aeea5SJeff Kirsher { 2455351638e7SJiri Pirko struct net_device *net_dev = netdev_notifier_info_to_dev(ptr); 2456874aeea5SJeff Kirsher 24577fa8d547SShradha Shah if ((net_dev->netdev_ops == &efx_netdev_ops) && 2458874aeea5SJeff Kirsher event == NETDEV_CHANGENAME) 2459874aeea5SJeff Kirsher efx_update_name(netdev_priv(net_dev)); 2460874aeea5SJeff Kirsher 2461874aeea5SJeff Kirsher return NOTIFY_DONE; 2462874aeea5SJeff Kirsher } 2463874aeea5SJeff Kirsher 2464874aeea5SJeff Kirsher static struct notifier_block efx_netdev_notifier = { 2465874aeea5SJeff Kirsher .notifier_call = efx_netdev_event, 2466874aeea5SJeff Kirsher }; 2467874aeea5SJeff Kirsher 2468874aeea5SJeff Kirsher static ssize_t 2469874aeea5SJeff Kirsher show_phy_type(struct device *dev, struct device_attribute *attr, char *buf) 2470874aeea5SJeff Kirsher { 2471874aeea5SJeff Kirsher struct efx_nic *efx = pci_get_drvdata(to_pci_dev(dev)); 2472874aeea5SJeff Kirsher return sprintf(buf, "%d\n", efx->phy_type); 2473874aeea5SJeff Kirsher } 2474776fbcc9SBen Hutchings static DEVICE_ATTR(phy_type, 0444, show_phy_type, NULL); 2475874aeea5SJeff Kirsher 2476e7fef9b4SEdward Cree #ifdef CONFIG_SFC_MCDI_LOGGING 2477e7fef9b4SEdward Cree static ssize_t show_mcdi_log(struct device *dev, struct device_attribute *attr, 2478e7fef9b4SEdward Cree char *buf) 2479e7fef9b4SEdward Cree { 2480e7fef9b4SEdward Cree struct efx_nic *efx = pci_get_drvdata(to_pci_dev(dev)); 2481e7fef9b4SEdward Cree struct efx_mcdi_iface *mcdi = efx_mcdi(efx); 2482e7fef9b4SEdward Cree 2483e7fef9b4SEdward Cree return scnprintf(buf, PAGE_SIZE, "%d\n", mcdi->logging_enabled); 2484e7fef9b4SEdward Cree } 2485e7fef9b4SEdward Cree static ssize_t set_mcdi_log(struct device *dev, struct device_attribute *attr, 2486e7fef9b4SEdward Cree const char *buf, size_t count) 2487e7fef9b4SEdward Cree { 2488e7fef9b4SEdward Cree struct efx_nic *efx = pci_get_drvdata(to_pci_dev(dev)); 2489e7fef9b4SEdward Cree struct efx_mcdi_iface *mcdi = efx_mcdi(efx); 2490e7fef9b4SEdward Cree bool enable = count > 0 && *buf != '0'; 2491e7fef9b4SEdward Cree 2492e7fef9b4SEdward Cree mcdi->logging_enabled = enable; 2493e7fef9b4SEdward Cree return count; 2494e7fef9b4SEdward Cree } 2495e7fef9b4SEdward Cree static DEVICE_ATTR(mcdi_logging, 0644, show_mcdi_log, set_mcdi_log); 2496e7fef9b4SEdward Cree #endif 2497e7fef9b4SEdward Cree 2498874aeea5SJeff Kirsher static int efx_register_netdev(struct efx_nic *efx) 2499874aeea5SJeff Kirsher { 2500874aeea5SJeff Kirsher struct net_device *net_dev = efx->net_dev; 2501874aeea5SJeff Kirsher struct efx_channel *channel; 2502874aeea5SJeff Kirsher int rc; 2503874aeea5SJeff Kirsher 2504874aeea5SJeff Kirsher net_dev->watchdog_timeo = 5 * HZ; 2505874aeea5SJeff Kirsher net_dev->irq = efx->pci_dev->irq; 25067fa8d547SShradha Shah net_dev->netdev_ops = &efx_netdev_ops; 25077fa8d547SShradha Shah if (efx_nic_rev(efx) >= EFX_REV_HUNT_A0) 25088127d661SBen Hutchings net_dev->priv_flags |= IFF_UNICAST_FLT; 25097ad24ea4SWilfried Klaebe net_dev->ethtool_ops = &efx_ethtool_ops; 25107e6d06f0SBen Hutchings net_dev->gso_max_segs = EFX_TSO_MAX_SEGS; 2511cd94e519SBert Kenward net_dev->min_mtu = EFX_MIN_MTU; 2512cd94e519SBert Kenward net_dev->max_mtu = EFX_MAX_MTU; 2513874aeea5SJeff Kirsher 2514874aeea5SJeff Kirsher rtnl_lock(); 2515874aeea5SJeff Kirsher 25167153f623SBen Hutchings /* Enable resets to be scheduled and check whether any were 25177153f623SBen Hutchings * already requested. If so, the NIC is probably hosed so we 25187153f623SBen Hutchings * abort. 25197153f623SBen Hutchings */ 25207153f623SBen Hutchings efx->state = STATE_READY; 25217153f623SBen Hutchings smp_mb(); /* ensure we change state before checking reset_pending */ 25227153f623SBen Hutchings if (efx->reset_pending) { 25237153f623SBen Hutchings netif_err(efx, probe, efx->net_dev, 25247153f623SBen Hutchings "aborting probe due to scheduled reset\n"); 25257153f623SBen Hutchings rc = -EIO; 25267153f623SBen Hutchings goto fail_locked; 25277153f623SBen Hutchings } 25287153f623SBen Hutchings 2529874aeea5SJeff Kirsher rc = dev_alloc_name(net_dev, net_dev->name); 2530874aeea5SJeff Kirsher if (rc < 0) 2531874aeea5SJeff Kirsher goto fail_locked; 2532874aeea5SJeff Kirsher efx_update_name(efx); 2533874aeea5SJeff Kirsher 25348f8b3d51SBen Hutchings /* Always start with carrier off; PHY events will detect the link */ 25358f8b3d51SBen Hutchings netif_carrier_off(net_dev); 25368f8b3d51SBen Hutchings 2537874aeea5SJeff Kirsher rc = register_netdevice(net_dev); 2538874aeea5SJeff Kirsher if (rc) 2539874aeea5SJeff Kirsher goto fail_locked; 2540874aeea5SJeff Kirsher 2541874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) { 2542874aeea5SJeff Kirsher struct efx_tx_queue *tx_queue; 2543874aeea5SJeff Kirsher efx_for_each_channel_tx_queue(tx_queue, channel) 2544874aeea5SJeff Kirsher efx_init_tx_queue_core_txq(tx_queue); 2545874aeea5SJeff Kirsher } 2546874aeea5SJeff Kirsher 25470bcf4a64SBen Hutchings efx_associate(efx); 25480bcf4a64SBen Hutchings 2549874aeea5SJeff Kirsher rtnl_unlock(); 2550874aeea5SJeff Kirsher 2551874aeea5SJeff Kirsher rc = device_create_file(&efx->pci_dev->dev, &dev_attr_phy_type); 2552874aeea5SJeff Kirsher if (rc) { 2553874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, 2554874aeea5SJeff Kirsher "failed to init net dev attributes\n"); 2555874aeea5SJeff Kirsher goto fail_registered; 2556874aeea5SJeff Kirsher } 2557e7fef9b4SEdward Cree #ifdef CONFIG_SFC_MCDI_LOGGING 2558e7fef9b4SEdward Cree rc = device_create_file(&efx->pci_dev->dev, &dev_attr_mcdi_logging); 2559e7fef9b4SEdward Cree if (rc) { 2560e7fef9b4SEdward Cree netif_err(efx, drv, efx->net_dev, 2561e7fef9b4SEdward Cree "failed to init net dev attributes\n"); 2562e7fef9b4SEdward Cree goto fail_attr_mcdi_logging; 2563e7fef9b4SEdward Cree } 2564e7fef9b4SEdward Cree #endif 2565874aeea5SJeff Kirsher 2566874aeea5SJeff Kirsher return 0; 2567874aeea5SJeff Kirsher 2568e7fef9b4SEdward Cree #ifdef CONFIG_SFC_MCDI_LOGGING 2569e7fef9b4SEdward Cree fail_attr_mcdi_logging: 2570e7fef9b4SEdward Cree device_remove_file(&efx->pci_dev->dev, &dev_attr_phy_type); 2571e7fef9b4SEdward Cree #endif 25727153f623SBen Hutchings fail_registered: 25737153f623SBen Hutchings rtnl_lock(); 25740bcf4a64SBen Hutchings efx_dissociate(efx); 25757153f623SBen Hutchings unregister_netdevice(net_dev); 2576874aeea5SJeff Kirsher fail_locked: 25777153f623SBen Hutchings efx->state = STATE_UNINIT; 2578874aeea5SJeff Kirsher rtnl_unlock(); 2579874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, "could not register net dev\n"); 2580874aeea5SJeff Kirsher return rc; 2581874aeea5SJeff Kirsher } 2582874aeea5SJeff Kirsher 2583874aeea5SJeff Kirsher static void efx_unregister_netdev(struct efx_nic *efx) 2584874aeea5SJeff Kirsher { 2585874aeea5SJeff Kirsher if (!efx->net_dev) 2586874aeea5SJeff Kirsher return; 2587874aeea5SJeff Kirsher 2588874aeea5SJeff Kirsher BUG_ON(netdev_priv(efx->net_dev) != efx); 2589874aeea5SJeff Kirsher 2590e7fef9b4SEdward Cree if (efx_dev_registered(efx)) { 2591874aeea5SJeff Kirsher strlcpy(efx->name, pci_name(efx->pci_dev), sizeof(efx->name)); 2592e7fef9b4SEdward Cree #ifdef CONFIG_SFC_MCDI_LOGGING 2593e7fef9b4SEdward Cree device_remove_file(&efx->pci_dev->dev, &dev_attr_mcdi_logging); 2594e7fef9b4SEdward Cree #endif 2595874aeea5SJeff Kirsher device_remove_file(&efx->pci_dev->dev, &dev_attr_phy_type); 2596e7fef9b4SEdward Cree unregister_netdev(efx->net_dev); 2597e7fef9b4SEdward Cree } 2598874aeea5SJeff Kirsher } 2599874aeea5SJeff Kirsher 2600874aeea5SJeff Kirsher /************************************************************************** 2601874aeea5SJeff Kirsher * 2602874aeea5SJeff Kirsher * Device reset and suspend 2603874aeea5SJeff Kirsher * 2604874aeea5SJeff Kirsher **************************************************************************/ 2605874aeea5SJeff Kirsher 2606874aeea5SJeff Kirsher /* Tears down the entire software state and most of the hardware state 2607874aeea5SJeff Kirsher * before reset. */ 2608874aeea5SJeff Kirsher void efx_reset_down(struct efx_nic *efx, enum reset_type method) 2609874aeea5SJeff Kirsher { 2610874aeea5SJeff Kirsher EFX_ASSERT_RESET_SERIALISED(efx); 2611874aeea5SJeff Kirsher 2612e283546cSEdward Cree if (method == RESET_TYPE_MCDI_TIMEOUT) 2613e283546cSEdward Cree efx->type->prepare_flr(efx); 2614e283546cSEdward Cree 2615874aeea5SJeff Kirsher efx_stop_all(efx); 2616d8291187SBen Hutchings efx_disable_interrupts(efx); 26175642ceefSBen Hutchings 26185642ceefSBen Hutchings mutex_lock(&efx->mac_lock); 2619087e9025SJon Cooper if (efx->port_initialized && method != RESET_TYPE_INVISIBLE && 2620087e9025SJon Cooper method != RESET_TYPE_DATAPATH) 2621874aeea5SJeff Kirsher efx->phy_op->fini(efx); 2622874aeea5SJeff Kirsher efx->type->fini(efx); 2623874aeea5SJeff Kirsher } 2624874aeea5SJeff Kirsher 2625874aeea5SJeff Kirsher /* This function will always ensure that the locks acquired in 2626874aeea5SJeff Kirsher * efx_reset_down() are released. A failure return code indicates 2627874aeea5SJeff Kirsher * that we were unable to reinitialise the hardware, and the 2628874aeea5SJeff Kirsher * driver should be disabled. If ok is false, then the rx and tx 2629874aeea5SJeff Kirsher * engines are not restarted, pending a RESET_DISABLE. */ 2630874aeea5SJeff Kirsher int efx_reset_up(struct efx_nic *efx, enum reset_type method, bool ok) 2631874aeea5SJeff Kirsher { 2632874aeea5SJeff Kirsher int rc; 2633874aeea5SJeff Kirsher 2634874aeea5SJeff Kirsher EFX_ASSERT_RESET_SERIALISED(efx); 2635874aeea5SJeff Kirsher 2636e283546cSEdward Cree if (method == RESET_TYPE_MCDI_TIMEOUT) 2637e283546cSEdward Cree efx->type->finish_flr(efx); 2638e283546cSEdward Cree 2639e283546cSEdward Cree /* Ensure that SRAM is initialised even if we're disabling the device */ 2640874aeea5SJeff Kirsher rc = efx->type->init(efx); 2641874aeea5SJeff Kirsher if (rc) { 2642874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, "failed to initialise NIC\n"); 2643874aeea5SJeff Kirsher goto fail; 2644874aeea5SJeff Kirsher } 2645874aeea5SJeff Kirsher 2646874aeea5SJeff Kirsher if (!ok) 2647874aeea5SJeff Kirsher goto fail; 2648874aeea5SJeff Kirsher 2649087e9025SJon Cooper if (efx->port_initialized && method != RESET_TYPE_INVISIBLE && 2650087e9025SJon Cooper method != RESET_TYPE_DATAPATH) { 2651874aeea5SJeff Kirsher rc = efx->phy_op->init(efx); 2652874aeea5SJeff Kirsher if (rc) 2653874aeea5SJeff Kirsher goto fail; 2654267d9d73SEdward Cree rc = efx->phy_op->reconfigure(efx); 2655267d9d73SEdward Cree if (rc && rc != -EPERM) 2656874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, 2657874aeea5SJeff Kirsher "could not restore PHY settings\n"); 2658874aeea5SJeff Kirsher } 2659874aeea5SJeff Kirsher 2660261e4d96SJon Cooper rc = efx_enable_interrupts(efx); 2661261e4d96SJon Cooper if (rc) 2662261e4d96SJon Cooper goto fail; 26636d8aaaf6SDaniel Pieczko 26646d8aaaf6SDaniel Pieczko #ifdef CONFIG_SFC_SRIOV 26656d8aaaf6SDaniel Pieczko rc = efx->type->vswitching_restore(efx); 26666d8aaaf6SDaniel Pieczko if (rc) /* not fatal; the PF will still work fine */ 26676d8aaaf6SDaniel Pieczko netif_warn(efx, probe, efx->net_dev, 26686d8aaaf6SDaniel Pieczko "failed to restore vswitching rc=%d;" 26696d8aaaf6SDaniel Pieczko " VFs may not function\n", rc); 26706d8aaaf6SDaniel Pieczko #endif 26716d8aaaf6SDaniel Pieczko 26720d322413SEdward Cree down_read(&efx->filter_sem); 2673874aeea5SJeff Kirsher efx_restore_filters(efx); 26740d322413SEdward Cree up_read(&efx->filter_sem); 26757fa8d547SShradha Shah if (efx->type->sriov_reset) 2676d98a4ffeSShradha Shah efx->type->sriov_reset(efx); 2677874aeea5SJeff Kirsher 2678874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 2679874aeea5SJeff Kirsher 2680874aeea5SJeff Kirsher efx_start_all(efx); 2681874aeea5SJeff Kirsher 2682e5fbd977SJon Cooper if (efx->type->udp_tnl_push_ports) 2683e5fbd977SJon Cooper efx->type->udp_tnl_push_ports(efx); 2684e5fbd977SJon Cooper 2685874aeea5SJeff Kirsher return 0; 2686874aeea5SJeff Kirsher 2687874aeea5SJeff Kirsher fail: 2688874aeea5SJeff Kirsher efx->port_initialized = false; 2689874aeea5SJeff Kirsher 2690874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 2691874aeea5SJeff Kirsher 2692874aeea5SJeff Kirsher return rc; 2693874aeea5SJeff Kirsher } 2694874aeea5SJeff Kirsher 2695874aeea5SJeff Kirsher /* Reset the NIC using the specified method. Note that the reset may 2696874aeea5SJeff Kirsher * fail, in which case the card will be left in an unusable state. 2697874aeea5SJeff Kirsher * 2698874aeea5SJeff Kirsher * Caller must hold the rtnl_lock. 2699874aeea5SJeff Kirsher */ 2700874aeea5SJeff Kirsher int efx_reset(struct efx_nic *efx, enum reset_type method) 2701874aeea5SJeff Kirsher { 2702874aeea5SJeff Kirsher int rc, rc2; 2703874aeea5SJeff Kirsher bool disabled; 2704874aeea5SJeff Kirsher 2705874aeea5SJeff Kirsher netif_info(efx, drv, efx->net_dev, "resetting (%s)\n", 2706874aeea5SJeff Kirsher RESET_TYPE(method)); 2707874aeea5SJeff Kirsher 2708c2f3b8e3SDaniel Pieczko efx_device_detach_sync(efx); 2709874aeea5SJeff Kirsher efx_reset_down(efx, method); 2710874aeea5SJeff Kirsher 2711874aeea5SJeff Kirsher rc = efx->type->reset(efx, method); 2712874aeea5SJeff Kirsher if (rc) { 2713874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, "failed to reset hardware\n"); 2714874aeea5SJeff Kirsher goto out; 2715874aeea5SJeff Kirsher } 2716874aeea5SJeff Kirsher 2717874aeea5SJeff Kirsher /* Clear flags for the scopes we covered. We assume the NIC and 2718874aeea5SJeff Kirsher * driver are now quiescent so that there is no race here. 2719874aeea5SJeff Kirsher */ 2720e283546cSEdward Cree if (method < RESET_TYPE_MAX_METHOD) 2721874aeea5SJeff Kirsher efx->reset_pending &= -(1 << (method + 1)); 2722e283546cSEdward Cree else /* it doesn't fit into the well-ordered scope hierarchy */ 2723e283546cSEdward Cree __clear_bit(method, &efx->reset_pending); 2724874aeea5SJeff Kirsher 2725874aeea5SJeff Kirsher /* Reinitialise bus-mastering, which may have been turned off before 2726874aeea5SJeff Kirsher * the reset was scheduled. This is still appropriate, even in the 2727874aeea5SJeff Kirsher * RESET_TYPE_DISABLE since this driver generally assumes the hardware 2728874aeea5SJeff Kirsher * can respond to requests. */ 2729874aeea5SJeff Kirsher pci_set_master(efx->pci_dev); 2730874aeea5SJeff Kirsher 2731874aeea5SJeff Kirsher out: 2732874aeea5SJeff Kirsher /* Leave device stopped if necessary */ 2733626950dbSAlexandre Rames disabled = rc || 2734626950dbSAlexandre Rames method == RESET_TYPE_DISABLE || 2735626950dbSAlexandre Rames method == RESET_TYPE_RECOVER_OR_DISABLE; 2736874aeea5SJeff Kirsher rc2 = efx_reset_up(efx, method, !disabled); 2737874aeea5SJeff Kirsher if (rc2) { 2738874aeea5SJeff Kirsher disabled = true; 2739874aeea5SJeff Kirsher if (!rc) 2740874aeea5SJeff Kirsher rc = rc2; 2741874aeea5SJeff Kirsher } 2742874aeea5SJeff Kirsher 2743874aeea5SJeff Kirsher if (disabled) { 2744874aeea5SJeff Kirsher dev_close(efx->net_dev); 2745874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, "has been disabled\n"); 2746874aeea5SJeff Kirsher efx->state = STATE_DISABLED; 2747874aeea5SJeff Kirsher } else { 2748874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "reset complete\n"); 27499c568fd8SPeter Dunning efx_device_attach_if_not_resetting(efx); 2750874aeea5SJeff Kirsher } 2751874aeea5SJeff Kirsher return rc; 2752874aeea5SJeff Kirsher } 2753874aeea5SJeff Kirsher 2754626950dbSAlexandre Rames /* Try recovery mechanisms. 2755626950dbSAlexandre Rames * For now only EEH is supported. 2756626950dbSAlexandre Rames * Returns 0 if the recovery mechanisms are unsuccessful. 2757626950dbSAlexandre Rames * Returns a non-zero value otherwise. 2758626950dbSAlexandre Rames */ 2759b28405b0SAlexandre Rames int efx_try_recovery(struct efx_nic *efx) 2760626950dbSAlexandre Rames { 2761626950dbSAlexandre Rames #ifdef CONFIG_EEH 2762626950dbSAlexandre Rames /* A PCI error can occur and not be seen by EEH because nothing 2763626950dbSAlexandre Rames * happens on the PCI bus. In this case the driver may fail and 2764626950dbSAlexandre Rames * schedule a 'recover or reset', leading to this recovery handler. 2765626950dbSAlexandre Rames * Manually call the eeh failure check function. 2766626950dbSAlexandre Rames */ 276712a89dbaSBenjamin Herrenschmidt struct eeh_dev *eehdev = pci_dev_to_eeh_dev(efx->pci_dev); 2768626950dbSAlexandre Rames if (eeh_dev_check_failure(eehdev)) { 2769626950dbSAlexandre Rames /* The EEH mechanisms will handle the error and reset the 2770626950dbSAlexandre Rames * device if necessary. 2771626950dbSAlexandre Rames */ 2772626950dbSAlexandre Rames return 1; 2773626950dbSAlexandre Rames } 2774626950dbSAlexandre Rames #endif 2775626950dbSAlexandre Rames return 0; 2776626950dbSAlexandre Rames } 2777626950dbSAlexandre Rames 277874cd60a4SJon Cooper static void efx_wait_for_bist_end(struct efx_nic *efx) 277974cd60a4SJon Cooper { 278074cd60a4SJon Cooper int i; 278174cd60a4SJon Cooper 278274cd60a4SJon Cooper for (i = 0; i < BIST_WAIT_DELAY_COUNT; ++i) { 278374cd60a4SJon Cooper if (efx_mcdi_poll_reboot(efx)) 278474cd60a4SJon Cooper goto out; 278574cd60a4SJon Cooper msleep(BIST_WAIT_DELAY_MS); 278674cd60a4SJon Cooper } 278774cd60a4SJon Cooper 278874cd60a4SJon Cooper netif_err(efx, drv, efx->net_dev, "Warning: No MC reboot after BIST mode\n"); 278974cd60a4SJon Cooper out: 279074cd60a4SJon Cooper /* Either way unset the BIST flag. If we found no reboot we probably 279174cd60a4SJon Cooper * won't recover, but we should try. 279274cd60a4SJon Cooper */ 279374cd60a4SJon Cooper efx->mc_bist_for_other_fn = false; 279474cd60a4SJon Cooper } 279574cd60a4SJon Cooper 2796874aeea5SJeff Kirsher /* The worker thread exists so that code that cannot sleep can 2797874aeea5SJeff Kirsher * schedule a reset for later. 2798874aeea5SJeff Kirsher */ 2799874aeea5SJeff Kirsher static void efx_reset_work(struct work_struct *data) 2800874aeea5SJeff Kirsher { 2801874aeea5SJeff Kirsher struct efx_nic *efx = container_of(data, struct efx_nic, reset_work); 2802626950dbSAlexandre Rames unsigned long pending; 2803626950dbSAlexandre Rames enum reset_type method; 2804626950dbSAlexandre Rames 2805626950dbSAlexandre Rames pending = ACCESS_ONCE(efx->reset_pending); 2806626950dbSAlexandre Rames method = fls(pending) - 1; 2807626950dbSAlexandre Rames 280874cd60a4SJon Cooper if (method == RESET_TYPE_MC_BIST) 280974cd60a4SJon Cooper efx_wait_for_bist_end(efx); 281074cd60a4SJon Cooper 2811626950dbSAlexandre Rames if ((method == RESET_TYPE_RECOVER_OR_DISABLE || 2812626950dbSAlexandre Rames method == RESET_TYPE_RECOVER_OR_ALL) && 2813626950dbSAlexandre Rames efx_try_recovery(efx)) 2814626950dbSAlexandre Rames return; 2815874aeea5SJeff Kirsher 2816874aeea5SJeff Kirsher if (!pending) 2817874aeea5SJeff Kirsher return; 2818874aeea5SJeff Kirsher 2819874aeea5SJeff Kirsher rtnl_lock(); 28207153f623SBen Hutchings 28217153f623SBen Hutchings /* We checked the state in efx_schedule_reset() but it may 28227153f623SBen Hutchings * have changed by now. Now that we have the RTNL lock, 28237153f623SBen Hutchings * it cannot change again. 28247153f623SBen Hutchings */ 28257153f623SBen Hutchings if (efx->state == STATE_READY) 2826626950dbSAlexandre Rames (void)efx_reset(efx, method); 28277153f623SBen Hutchings 2828874aeea5SJeff Kirsher rtnl_unlock(); 2829874aeea5SJeff Kirsher } 2830874aeea5SJeff Kirsher 2831874aeea5SJeff Kirsher void efx_schedule_reset(struct efx_nic *efx, enum reset_type type) 2832874aeea5SJeff Kirsher { 2833874aeea5SJeff Kirsher enum reset_type method; 2834874aeea5SJeff Kirsher 2835626950dbSAlexandre Rames if (efx->state == STATE_RECOVERY) { 2836626950dbSAlexandre Rames netif_dbg(efx, drv, efx->net_dev, 2837626950dbSAlexandre Rames "recovering: skip scheduling %s reset\n", 2838626950dbSAlexandre Rames RESET_TYPE(type)); 2839626950dbSAlexandre Rames return; 2840626950dbSAlexandre Rames } 2841626950dbSAlexandre Rames 2842874aeea5SJeff Kirsher switch (type) { 2843874aeea5SJeff Kirsher case RESET_TYPE_INVISIBLE: 2844874aeea5SJeff Kirsher case RESET_TYPE_ALL: 2845626950dbSAlexandre Rames case RESET_TYPE_RECOVER_OR_ALL: 2846874aeea5SJeff Kirsher case RESET_TYPE_WORLD: 2847874aeea5SJeff Kirsher case RESET_TYPE_DISABLE: 2848626950dbSAlexandre Rames case RESET_TYPE_RECOVER_OR_DISABLE: 2849087e9025SJon Cooper case RESET_TYPE_DATAPATH: 285074cd60a4SJon Cooper case RESET_TYPE_MC_BIST: 2851e283546cSEdward Cree case RESET_TYPE_MCDI_TIMEOUT: 2852874aeea5SJeff Kirsher method = type; 2853874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "scheduling %s reset\n", 2854874aeea5SJeff Kirsher RESET_TYPE(method)); 2855874aeea5SJeff Kirsher break; 2856874aeea5SJeff Kirsher default: 2857874aeea5SJeff Kirsher method = efx->type->map_reset_reason(type); 2858874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, 2859874aeea5SJeff Kirsher "scheduling %s reset for %s\n", 2860874aeea5SJeff Kirsher RESET_TYPE(method), RESET_TYPE(type)); 2861874aeea5SJeff Kirsher break; 2862874aeea5SJeff Kirsher } 2863874aeea5SJeff Kirsher 2864874aeea5SJeff Kirsher set_bit(method, &efx->reset_pending); 28657153f623SBen Hutchings smp_mb(); /* ensure we change reset_pending before checking state */ 28667153f623SBen Hutchings 28677153f623SBen Hutchings /* If we're not READY then just leave the flags set as the cue 28687153f623SBen Hutchings * to abort probing or reschedule the reset later. 28697153f623SBen Hutchings */ 28707153f623SBen Hutchings if (ACCESS_ONCE(efx->state) != STATE_READY) 28717153f623SBen Hutchings return; 2872874aeea5SJeff Kirsher 2873874aeea5SJeff Kirsher /* efx_process_channel() will no longer read events once a 2874874aeea5SJeff Kirsher * reset is scheduled. So switch back to poll'd MCDI completions. */ 2875874aeea5SJeff Kirsher efx_mcdi_mode_poll(efx); 2876874aeea5SJeff Kirsher 2877874aeea5SJeff Kirsher queue_work(reset_workqueue, &efx->reset_work); 2878874aeea5SJeff Kirsher } 2879874aeea5SJeff Kirsher 2880874aeea5SJeff Kirsher /************************************************************************** 2881874aeea5SJeff Kirsher * 2882874aeea5SJeff Kirsher * List of NICs we support 2883874aeea5SJeff Kirsher * 2884874aeea5SJeff Kirsher **************************************************************************/ 2885874aeea5SJeff Kirsher 2886874aeea5SJeff Kirsher /* PCI device ID table */ 28879baa3c34SBenoit Taine static const struct pci_device_id efx_pci_table[] = { 2888547c474fSBen Hutchings {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0803), /* SFC9020 */ 2889874aeea5SJeff Kirsher .driver_data = (unsigned long) &siena_a0_nic_type}, 2890547c474fSBen Hutchings {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0813), /* SFL9021 */ 2891874aeea5SJeff Kirsher .driver_data = (unsigned long) &siena_a0_nic_type}, 28928127d661SBen Hutchings {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0903), /* SFC9120 PF */ 28938127d661SBen Hutchings .driver_data = (unsigned long) &efx_hunt_a0_nic_type}, 28946f7f8aa6SShradha Shah {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x1903), /* SFC9120 VF */ 28956f7f8aa6SShradha Shah .driver_data = (unsigned long) &efx_hunt_a0_vf_nic_type}, 28963b06a00eSMateusz Wrzesinski {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0923), /* SFC9140 PF */ 28973b06a00eSMateusz Wrzesinski .driver_data = (unsigned long) &efx_hunt_a0_nic_type}, 2898dd248f1bSBert Kenward {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x1923), /* SFC9140 VF */ 2899dd248f1bSBert Kenward .driver_data = (unsigned long) &efx_hunt_a0_vf_nic_type}, 2900dd248f1bSBert Kenward {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0a03), /* SFC9220 PF */ 2901dd248f1bSBert Kenward .driver_data = (unsigned long) &efx_hunt_a0_nic_type}, 2902dd248f1bSBert Kenward {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x1a03), /* SFC9220 VF */ 2903dd248f1bSBert Kenward .driver_data = (unsigned long) &efx_hunt_a0_vf_nic_type}, 2904874aeea5SJeff Kirsher {0} /* end of list */ 2905874aeea5SJeff Kirsher }; 2906874aeea5SJeff Kirsher 2907874aeea5SJeff Kirsher /************************************************************************** 2908874aeea5SJeff Kirsher * 2909874aeea5SJeff Kirsher * Dummy PHY/MAC operations 2910874aeea5SJeff Kirsher * 2911874aeea5SJeff Kirsher * Can be used for some unimplemented operations 2912874aeea5SJeff Kirsher * Needed so all function pointers are valid and do not have to be tested 2913874aeea5SJeff Kirsher * before use 2914874aeea5SJeff Kirsher * 2915874aeea5SJeff Kirsher **************************************************************************/ 2916874aeea5SJeff Kirsher int efx_port_dummy_op_int(struct efx_nic *efx) 2917874aeea5SJeff Kirsher { 2918874aeea5SJeff Kirsher return 0; 2919874aeea5SJeff Kirsher } 2920874aeea5SJeff Kirsher void efx_port_dummy_op_void(struct efx_nic *efx) {} 2921874aeea5SJeff Kirsher 2922874aeea5SJeff Kirsher static bool efx_port_dummy_op_poll(struct efx_nic *efx) 2923874aeea5SJeff Kirsher { 2924874aeea5SJeff Kirsher return false; 2925874aeea5SJeff Kirsher } 2926874aeea5SJeff Kirsher 2927874aeea5SJeff Kirsher static const struct efx_phy_operations efx_dummy_phy_operations = { 2928874aeea5SJeff Kirsher .init = efx_port_dummy_op_int, 2929874aeea5SJeff Kirsher .reconfigure = efx_port_dummy_op_int, 2930874aeea5SJeff Kirsher .poll = efx_port_dummy_op_poll, 2931874aeea5SJeff Kirsher .fini = efx_port_dummy_op_void, 2932874aeea5SJeff Kirsher }; 2933874aeea5SJeff Kirsher 2934874aeea5SJeff Kirsher /************************************************************************** 2935874aeea5SJeff Kirsher * 2936874aeea5SJeff Kirsher * Data housekeeping 2937874aeea5SJeff Kirsher * 2938874aeea5SJeff Kirsher **************************************************************************/ 2939874aeea5SJeff Kirsher 2940874aeea5SJeff Kirsher /* This zeroes out and then fills in the invariants in a struct 2941874aeea5SJeff Kirsher * efx_nic (including all sub-structures). 2942874aeea5SJeff Kirsher */ 2943adeb15aaSBen Hutchings static int efx_init_struct(struct efx_nic *efx, 2944874aeea5SJeff Kirsher struct pci_dev *pci_dev, struct net_device *net_dev) 2945874aeea5SJeff Kirsher { 29466f9f6ec2SAndrew Rybchenko int rc = -ENOMEM, i; 2947874aeea5SJeff Kirsher 2948874aeea5SJeff Kirsher /* Initialise common structures */ 29490bcf4a64SBen Hutchings INIT_LIST_HEAD(&efx->node); 29500bcf4a64SBen Hutchings INIT_LIST_HEAD(&efx->secondary_list); 2951874aeea5SJeff Kirsher spin_lock_init(&efx->biu_lock); 2952874aeea5SJeff Kirsher #ifdef CONFIG_SFC_MTD 2953874aeea5SJeff Kirsher INIT_LIST_HEAD(&efx->mtd_list); 2954874aeea5SJeff Kirsher #endif 2955874aeea5SJeff Kirsher INIT_WORK(&efx->reset_work, efx_reset_work); 2956874aeea5SJeff Kirsher INIT_DELAYED_WORK(&efx->monitor_work, efx_monitor); 2957dd40781eSBen Hutchings INIT_DELAYED_WORK(&efx->selftest_work, efx_selftest_async_work); 2958874aeea5SJeff Kirsher efx->pci_dev = pci_dev; 2959874aeea5SJeff Kirsher efx->msg_enable = debug; 2960f16aeea0SBen Hutchings efx->state = STATE_UNINIT; 2961874aeea5SJeff Kirsher strlcpy(efx->name, pci_name(pci_dev), sizeof(efx->name)); 2962874aeea5SJeff Kirsher 2963874aeea5SJeff Kirsher efx->net_dev = net_dev; 296443a3739dSJon Cooper efx->rx_prefix_size = efx->type->rx_prefix_size; 29652ec03014SAndrew Rybchenko efx->rx_ip_align = 29662ec03014SAndrew Rybchenko NET_IP_ALIGN ? (efx->rx_prefix_size + NET_IP_ALIGN) % 4 : 0; 296743a3739dSJon Cooper efx->rx_packet_hash_offset = 296843a3739dSJon Cooper efx->type->rx_hash_offset - efx->type->rx_prefix_size; 2969bd9a265dSJon Cooper efx->rx_packet_ts_offset = 2970bd9a265dSJon Cooper efx->type->rx_ts_offset - efx->type->rx_prefix_size; 2971874aeea5SJeff Kirsher spin_lock_init(&efx->stats_lock); 2972874aeea5SJeff Kirsher mutex_init(&efx->mac_lock); 2973874aeea5SJeff Kirsher efx->phy_op = &efx_dummy_phy_operations; 2974874aeea5SJeff Kirsher efx->mdio.dev = net_dev; 2975874aeea5SJeff Kirsher INIT_WORK(&efx->mac_work, efx_mac_work); 29769f2cb71cSBen Hutchings init_waitqueue_head(&efx->flush_wq); 2977874aeea5SJeff Kirsher 2978874aeea5SJeff Kirsher for (i = 0; i < EFX_MAX_CHANNELS; i++) { 2979874aeea5SJeff Kirsher efx->channel[i] = efx_alloc_channel(efx, i, NULL); 2980874aeea5SJeff Kirsher if (!efx->channel[i]) 2981874aeea5SJeff Kirsher goto fail; 2982d8291187SBen Hutchings efx->msi_context[i].efx = efx; 2983d8291187SBen Hutchings efx->msi_context[i].index = i; 2984874aeea5SJeff Kirsher } 2985874aeea5SJeff Kirsher 2986874aeea5SJeff Kirsher /* Higher numbered interrupt modes are less capable! */ 29876f9f6ec2SAndrew Rybchenko if (WARN_ON_ONCE(efx->type->max_interrupt_mode > 29886f9f6ec2SAndrew Rybchenko efx->type->min_interrupt_mode)) { 29896f9f6ec2SAndrew Rybchenko rc = -EIO; 29906f9f6ec2SAndrew Rybchenko goto fail; 29916f9f6ec2SAndrew Rybchenko } 2992874aeea5SJeff Kirsher efx->interrupt_mode = max(efx->type->max_interrupt_mode, 2993874aeea5SJeff Kirsher interrupt_mode); 29946f9f6ec2SAndrew Rybchenko efx->interrupt_mode = min(efx->type->min_interrupt_mode, 29956f9f6ec2SAndrew Rybchenko interrupt_mode); 2996874aeea5SJeff Kirsher 2997874aeea5SJeff Kirsher /* Would be good to use the net_dev name, but we're too early */ 2998874aeea5SJeff Kirsher snprintf(efx->workqueue_name, sizeof(efx->workqueue_name), "sfc%s", 2999874aeea5SJeff Kirsher pci_name(pci_dev)); 3000874aeea5SJeff Kirsher efx->workqueue = create_singlethread_workqueue(efx->workqueue_name); 3001874aeea5SJeff Kirsher if (!efx->workqueue) 3002874aeea5SJeff Kirsher goto fail; 3003874aeea5SJeff Kirsher 3004874aeea5SJeff Kirsher return 0; 3005874aeea5SJeff Kirsher 3006874aeea5SJeff Kirsher fail: 3007874aeea5SJeff Kirsher efx_fini_struct(efx); 30086f9f6ec2SAndrew Rybchenko return rc; 3009874aeea5SJeff Kirsher } 3010874aeea5SJeff Kirsher 3011874aeea5SJeff Kirsher static void efx_fini_struct(struct efx_nic *efx) 3012874aeea5SJeff Kirsher { 3013874aeea5SJeff Kirsher int i; 3014874aeea5SJeff Kirsher 3015874aeea5SJeff Kirsher for (i = 0; i < EFX_MAX_CHANNELS; i++) 3016874aeea5SJeff Kirsher kfree(efx->channel[i]); 3017874aeea5SJeff Kirsher 3018ef215e64SBen Hutchings kfree(efx->vpd_sn); 3019ef215e64SBen Hutchings 3020874aeea5SJeff Kirsher if (efx->workqueue) { 3021874aeea5SJeff Kirsher destroy_workqueue(efx->workqueue); 3022874aeea5SJeff Kirsher efx->workqueue = NULL; 3023874aeea5SJeff Kirsher } 3024874aeea5SJeff Kirsher } 3025874aeea5SJeff Kirsher 3026e4d112e4SEdward Cree void efx_update_sw_stats(struct efx_nic *efx, u64 *stats) 3027e4d112e4SEdward Cree { 3028e4d112e4SEdward Cree u64 n_rx_nodesc_trunc = 0; 3029e4d112e4SEdward Cree struct efx_channel *channel; 3030e4d112e4SEdward Cree 3031e4d112e4SEdward Cree efx_for_each_channel(channel, efx) 3032e4d112e4SEdward Cree n_rx_nodesc_trunc += channel->n_rx_nodesc_trunc; 3033e4d112e4SEdward Cree stats[GENERIC_STAT_rx_nodesc_trunc] = n_rx_nodesc_trunc; 3034e4d112e4SEdward Cree stats[GENERIC_STAT_rx_noskb_drops] = atomic_read(&efx->n_rx_noskb_drops); 3035e4d112e4SEdward Cree } 3036e4d112e4SEdward Cree 3037874aeea5SJeff Kirsher /************************************************************************** 3038874aeea5SJeff Kirsher * 3039874aeea5SJeff Kirsher * PCI interface 3040874aeea5SJeff Kirsher * 3041874aeea5SJeff Kirsher **************************************************************************/ 3042874aeea5SJeff Kirsher 3043874aeea5SJeff Kirsher /* Main body of final NIC shutdown code 3044874aeea5SJeff Kirsher * This is called only at module unload (or hotplug removal). 3045874aeea5SJeff Kirsher */ 3046874aeea5SJeff Kirsher static void efx_pci_remove_main(struct efx_nic *efx) 3047874aeea5SJeff Kirsher { 30487153f623SBen Hutchings /* Flush reset_work. It can no longer be scheduled since we 30497153f623SBen Hutchings * are not READY. 30507153f623SBen Hutchings */ 30517153f623SBen Hutchings BUG_ON(efx->state == STATE_READY); 30527153f623SBen Hutchings cancel_work_sync(&efx->reset_work); 30537153f623SBen Hutchings 3054d8291187SBen Hutchings efx_disable_interrupts(efx); 3055874aeea5SJeff Kirsher efx_nic_fini_interrupt(efx); 3056874aeea5SJeff Kirsher efx_fini_port(efx); 3057874aeea5SJeff Kirsher efx->type->fini(efx); 3058874aeea5SJeff Kirsher efx_fini_napi(efx); 3059874aeea5SJeff Kirsher efx_remove_all(efx); 3060874aeea5SJeff Kirsher } 3061874aeea5SJeff Kirsher 3062874aeea5SJeff Kirsher /* Final NIC shutdown 30632a3fc311SDaniel Pieczko * This is called only at module unload (or hotplug removal). A PF can call 30642a3fc311SDaniel Pieczko * this on its VFs to ensure they are unbound first. 3065874aeea5SJeff Kirsher */ 3066874aeea5SJeff Kirsher static void efx_pci_remove(struct pci_dev *pci_dev) 3067874aeea5SJeff Kirsher { 3068874aeea5SJeff Kirsher struct efx_nic *efx; 3069874aeea5SJeff Kirsher 3070874aeea5SJeff Kirsher efx = pci_get_drvdata(pci_dev); 3071874aeea5SJeff Kirsher if (!efx) 3072874aeea5SJeff Kirsher return; 3073874aeea5SJeff Kirsher 3074874aeea5SJeff Kirsher /* Mark the NIC as fini, then stop the interface */ 3075874aeea5SJeff Kirsher rtnl_lock(); 30760bcf4a64SBen Hutchings efx_dissociate(efx); 3077874aeea5SJeff Kirsher dev_close(efx->net_dev); 3078d8291187SBen Hutchings efx_disable_interrupts(efx); 3079ea6bb99eSEdward Cree efx->state = STATE_UNINIT; 3080874aeea5SJeff Kirsher rtnl_unlock(); 3081874aeea5SJeff Kirsher 30827fa8d547SShradha Shah if (efx->type->sriov_fini) 3083d98a4ffeSShradha Shah efx->type->sriov_fini(efx); 30847fa8d547SShradha Shah 3085874aeea5SJeff Kirsher efx_unregister_netdev(efx); 3086874aeea5SJeff Kirsher 3087874aeea5SJeff Kirsher efx_mtd_remove(efx); 3088874aeea5SJeff Kirsher 3089874aeea5SJeff Kirsher efx_pci_remove_main(efx); 3090874aeea5SJeff Kirsher 3091874aeea5SJeff Kirsher efx_fini_io(efx); 3092874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "shutdown successful\n"); 3093874aeea5SJeff Kirsher 3094874aeea5SJeff Kirsher efx_fini_struct(efx); 3095874aeea5SJeff Kirsher free_netdev(efx->net_dev); 3096626950dbSAlexandre Rames 3097626950dbSAlexandre Rames pci_disable_pcie_error_reporting(pci_dev); 3098874aeea5SJeff Kirsher }; 3099874aeea5SJeff Kirsher 3100460eeaa0SBen Hutchings /* NIC VPD information 3101460eeaa0SBen Hutchings * Called during probe to display the part number of the 3102460eeaa0SBen Hutchings * installed NIC. VPD is potentially very large but this should 3103460eeaa0SBen Hutchings * always appear within the first 512 bytes. 3104460eeaa0SBen Hutchings */ 3105460eeaa0SBen Hutchings #define SFC_VPD_LEN 512 3106ef215e64SBen Hutchings static void efx_probe_vpd_strings(struct efx_nic *efx) 3107460eeaa0SBen Hutchings { 3108460eeaa0SBen Hutchings struct pci_dev *dev = efx->pci_dev; 3109460eeaa0SBen Hutchings char vpd_data[SFC_VPD_LEN]; 3110460eeaa0SBen Hutchings ssize_t vpd_size; 3111ef215e64SBen Hutchings int ro_start, ro_size, i, j; 3112460eeaa0SBen Hutchings 3113460eeaa0SBen Hutchings /* Get the vpd data from the device */ 3114460eeaa0SBen Hutchings vpd_size = pci_read_vpd(dev, 0, sizeof(vpd_data), vpd_data); 3115460eeaa0SBen Hutchings if (vpd_size <= 0) { 3116460eeaa0SBen Hutchings netif_err(efx, drv, efx->net_dev, "Unable to read VPD\n"); 3117460eeaa0SBen Hutchings return; 3118460eeaa0SBen Hutchings } 3119460eeaa0SBen Hutchings 3120460eeaa0SBen Hutchings /* Get the Read only section */ 3121ef215e64SBen Hutchings ro_start = pci_vpd_find_tag(vpd_data, 0, vpd_size, PCI_VPD_LRDT_RO_DATA); 3122ef215e64SBen Hutchings if (ro_start < 0) { 3123460eeaa0SBen Hutchings netif_err(efx, drv, efx->net_dev, "VPD Read-only not found\n"); 3124460eeaa0SBen Hutchings return; 3125460eeaa0SBen Hutchings } 3126460eeaa0SBen Hutchings 3127ef215e64SBen Hutchings ro_size = pci_vpd_lrdt_size(&vpd_data[ro_start]); 3128ef215e64SBen Hutchings j = ro_size; 3129ef215e64SBen Hutchings i = ro_start + PCI_VPD_LRDT_TAG_SIZE; 3130460eeaa0SBen Hutchings if (i + j > vpd_size) 3131460eeaa0SBen Hutchings j = vpd_size - i; 3132460eeaa0SBen Hutchings 3133460eeaa0SBen Hutchings /* Get the Part number */ 3134460eeaa0SBen Hutchings i = pci_vpd_find_info_keyword(vpd_data, i, j, "PN"); 3135460eeaa0SBen Hutchings if (i < 0) { 3136460eeaa0SBen Hutchings netif_err(efx, drv, efx->net_dev, "Part number not found\n"); 3137460eeaa0SBen Hutchings return; 3138460eeaa0SBen Hutchings } 3139460eeaa0SBen Hutchings 3140460eeaa0SBen Hutchings j = pci_vpd_info_field_size(&vpd_data[i]); 3141460eeaa0SBen Hutchings i += PCI_VPD_INFO_FLD_HDR_SIZE; 3142460eeaa0SBen Hutchings if (i + j > vpd_size) { 3143460eeaa0SBen Hutchings netif_err(efx, drv, efx->net_dev, "Incomplete part number\n"); 3144460eeaa0SBen Hutchings return; 3145460eeaa0SBen Hutchings } 3146460eeaa0SBen Hutchings 3147460eeaa0SBen Hutchings netif_info(efx, drv, efx->net_dev, 3148460eeaa0SBen Hutchings "Part Number : %.*s\n", j, &vpd_data[i]); 3149ef215e64SBen Hutchings 3150ef215e64SBen Hutchings i = ro_start + PCI_VPD_LRDT_TAG_SIZE; 3151ef215e64SBen Hutchings j = ro_size; 3152ef215e64SBen Hutchings i = pci_vpd_find_info_keyword(vpd_data, i, j, "SN"); 3153ef215e64SBen Hutchings if (i < 0) { 3154ef215e64SBen Hutchings netif_err(efx, drv, efx->net_dev, "Serial number not found\n"); 3155ef215e64SBen Hutchings return; 3156ef215e64SBen Hutchings } 3157ef215e64SBen Hutchings 3158ef215e64SBen Hutchings j = pci_vpd_info_field_size(&vpd_data[i]); 3159ef215e64SBen Hutchings i += PCI_VPD_INFO_FLD_HDR_SIZE; 3160ef215e64SBen Hutchings if (i + j > vpd_size) { 3161ef215e64SBen Hutchings netif_err(efx, drv, efx->net_dev, "Incomplete serial number\n"); 3162ef215e64SBen Hutchings return; 3163ef215e64SBen Hutchings } 3164ef215e64SBen Hutchings 3165ef215e64SBen Hutchings efx->vpd_sn = kmalloc(j + 1, GFP_KERNEL); 3166ef215e64SBen Hutchings if (!efx->vpd_sn) 3167ef215e64SBen Hutchings return; 3168ef215e64SBen Hutchings 3169ef215e64SBen Hutchings snprintf(efx->vpd_sn, j + 1, "%s", &vpd_data[i]); 3170460eeaa0SBen Hutchings } 3171460eeaa0SBen Hutchings 3172460eeaa0SBen Hutchings 3173874aeea5SJeff Kirsher /* Main body of NIC initialisation 3174874aeea5SJeff Kirsher * This is called at module load (or hotplug insertion, theoretically). 3175874aeea5SJeff Kirsher */ 3176874aeea5SJeff Kirsher static int efx_pci_probe_main(struct efx_nic *efx) 3177874aeea5SJeff Kirsher { 3178874aeea5SJeff Kirsher int rc; 3179874aeea5SJeff Kirsher 3180874aeea5SJeff Kirsher /* Do start-of-day initialisation */ 3181874aeea5SJeff Kirsher rc = efx_probe_all(efx); 3182874aeea5SJeff Kirsher if (rc) 3183874aeea5SJeff Kirsher goto fail1; 3184874aeea5SJeff Kirsher 3185874aeea5SJeff Kirsher efx_init_napi(efx); 3186874aeea5SJeff Kirsher 3187874aeea5SJeff Kirsher rc = efx->type->init(efx); 3188874aeea5SJeff Kirsher if (rc) { 3189874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 3190874aeea5SJeff Kirsher "failed to initialise NIC\n"); 3191874aeea5SJeff Kirsher goto fail3; 3192874aeea5SJeff Kirsher } 3193874aeea5SJeff Kirsher 3194874aeea5SJeff Kirsher rc = efx_init_port(efx); 3195874aeea5SJeff Kirsher if (rc) { 3196874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 3197874aeea5SJeff Kirsher "failed to initialise port\n"); 3198874aeea5SJeff Kirsher goto fail4; 3199874aeea5SJeff Kirsher } 3200874aeea5SJeff Kirsher 3201874aeea5SJeff Kirsher rc = efx_nic_init_interrupt(efx); 3202874aeea5SJeff Kirsher if (rc) 3203874aeea5SJeff Kirsher goto fail5; 3204261e4d96SJon Cooper rc = efx_enable_interrupts(efx); 3205261e4d96SJon Cooper if (rc) 3206261e4d96SJon Cooper goto fail6; 3207874aeea5SJeff Kirsher 3208874aeea5SJeff Kirsher return 0; 3209874aeea5SJeff Kirsher 3210261e4d96SJon Cooper fail6: 3211261e4d96SJon Cooper efx_nic_fini_interrupt(efx); 3212874aeea5SJeff Kirsher fail5: 3213874aeea5SJeff Kirsher efx_fini_port(efx); 3214874aeea5SJeff Kirsher fail4: 3215874aeea5SJeff Kirsher efx->type->fini(efx); 3216874aeea5SJeff Kirsher fail3: 3217874aeea5SJeff Kirsher efx_fini_napi(efx); 3218874aeea5SJeff Kirsher efx_remove_all(efx); 3219874aeea5SJeff Kirsher fail1: 3220874aeea5SJeff Kirsher return rc; 3221874aeea5SJeff Kirsher } 3222874aeea5SJeff Kirsher 32238a531400SJon Cooper static int efx_pci_probe_post_io(struct efx_nic *efx) 32248a531400SJon Cooper { 32258a531400SJon Cooper struct net_device *net_dev = efx->net_dev; 32268a531400SJon Cooper int rc = efx_pci_probe_main(efx); 32278a531400SJon Cooper 32288a531400SJon Cooper if (rc) 32298a531400SJon Cooper return rc; 32308a531400SJon Cooper 32318a531400SJon Cooper if (efx->type->sriov_init) { 32328a531400SJon Cooper rc = efx->type->sriov_init(efx); 32338a531400SJon Cooper if (rc) 32348a531400SJon Cooper netif_err(efx, probe, efx->net_dev, 32358a531400SJon Cooper "SR-IOV can't be enabled rc %d\n", rc); 32368a531400SJon Cooper } 32378a531400SJon Cooper 32388a531400SJon Cooper /* Determine netdevice features */ 32398a531400SJon Cooper net_dev->features |= (efx->type->offload_features | NETIF_F_SG | 32408a531400SJon Cooper NETIF_F_TSO | NETIF_F_RXCSUM); 32418a531400SJon Cooper if (efx->type->offload_features & (NETIF_F_IPV6_CSUM | NETIF_F_HW_CSUM)) 32428a531400SJon Cooper net_dev->features |= NETIF_F_TSO6; 32438a531400SJon Cooper /* Check whether device supports TSO */ 32448a531400SJon Cooper if (!efx->type->tso_versions || !efx->type->tso_versions(efx)) 32458a531400SJon Cooper net_dev->features &= ~NETIF_F_ALL_TSO; 32468a531400SJon Cooper /* Mask for features that also apply to VLAN devices */ 32478a531400SJon Cooper net_dev->vlan_features |= (NETIF_F_HW_CSUM | NETIF_F_SG | 32488a531400SJon Cooper NETIF_F_HIGHDMA | NETIF_F_ALL_TSO | 32498a531400SJon Cooper NETIF_F_RXCSUM); 32508a531400SJon Cooper 32518a531400SJon Cooper net_dev->hw_features = net_dev->features & ~efx->fixed_features; 32528a531400SJon Cooper 32538a531400SJon Cooper /* Disable VLAN filtering by default. It may be enforced if 32548a531400SJon Cooper * the feature is fixed (i.e. VLAN filters are required to 32558a531400SJon Cooper * receive VLAN tagged packets due to vPort restrictions). 32568a531400SJon Cooper */ 32578a531400SJon Cooper net_dev->features &= ~NETIF_F_HW_VLAN_CTAG_FILTER; 32588a531400SJon Cooper net_dev->features |= efx->fixed_features; 32598a531400SJon Cooper 32608a531400SJon Cooper rc = efx_register_netdev(efx); 32618a531400SJon Cooper if (!rc) 32628a531400SJon Cooper return 0; 32638a531400SJon Cooper 32648a531400SJon Cooper efx_pci_remove_main(efx); 32658a531400SJon Cooper return rc; 32668a531400SJon Cooper } 32678a531400SJon Cooper 3268874aeea5SJeff Kirsher /* NIC initialisation 3269874aeea5SJeff Kirsher * 3270874aeea5SJeff Kirsher * This is called at module load (or hotplug insertion, 327173ba7b68SBen Hutchings * theoretically). It sets up PCI mappings, resets the NIC, 3272874aeea5SJeff Kirsher * sets up and registers the network devices with the kernel and hooks 3273874aeea5SJeff Kirsher * the interrupt service routine. It does not prepare the device for 3274874aeea5SJeff Kirsher * transmission; this is left to the first time one of the network 3275874aeea5SJeff Kirsher * interfaces is brought up (i.e. efx_net_open). 3276874aeea5SJeff Kirsher */ 327787d1fc11SBill Pemberton static int efx_pci_probe(struct pci_dev *pci_dev, 3278874aeea5SJeff Kirsher const struct pci_device_id *entry) 3279874aeea5SJeff Kirsher { 3280874aeea5SJeff Kirsher struct net_device *net_dev; 3281874aeea5SJeff Kirsher struct efx_nic *efx; 3282fadac6aaSBen Hutchings int rc; 3283874aeea5SJeff Kirsher 3284874aeea5SJeff Kirsher /* Allocate and initialise a struct net_device and struct efx_nic */ 3285874aeea5SJeff Kirsher net_dev = alloc_etherdev_mqs(sizeof(*efx), EFX_MAX_CORE_TX_QUEUES, 3286874aeea5SJeff Kirsher EFX_MAX_RX_QUEUES); 3287874aeea5SJeff Kirsher if (!net_dev) 3288874aeea5SJeff Kirsher return -ENOMEM; 3289adeb15aaSBen Hutchings efx = netdev_priv(net_dev); 3290adeb15aaSBen Hutchings efx->type = (const struct efx_nic_type *) entry->driver_data; 3291ebfcd0fdSAndrew Rybchenko efx->fixed_features |= NETIF_F_HIGHDMA; 3292eb7cfd8cSAndrew Rybchenko 3293874aeea5SJeff Kirsher pci_set_drvdata(pci_dev, efx); 3294874aeea5SJeff Kirsher SET_NETDEV_DEV(net_dev, &pci_dev->dev); 3295adeb15aaSBen Hutchings rc = efx_init_struct(efx, pci_dev, net_dev); 3296874aeea5SJeff Kirsher if (rc) 3297874aeea5SJeff Kirsher goto fail1; 3298874aeea5SJeff Kirsher 3299874aeea5SJeff Kirsher netif_info(efx, probe, efx->net_dev, 3300874aeea5SJeff Kirsher "Solarflare NIC detected\n"); 3301874aeea5SJeff Kirsher 33026f7f8aa6SShradha Shah if (!efx->type->is_vf) 3303ef215e64SBen Hutchings efx_probe_vpd_strings(efx); 3304460eeaa0SBen Hutchings 3305874aeea5SJeff Kirsher /* Set up basic I/O (BAR mappings etc) */ 3306874aeea5SJeff Kirsher rc = efx_init_io(efx); 3307874aeea5SJeff Kirsher if (rc) 3308874aeea5SJeff Kirsher goto fail2; 3309874aeea5SJeff Kirsher 33108a531400SJon Cooper rc = efx_pci_probe_post_io(efx); 33118a531400SJon Cooper if (rc) { 33128a531400SJon Cooper /* On failure, retry once immediately. 33138a531400SJon Cooper * If we aborted probe due to a scheduled reset, dismiss it. 33148a531400SJon Cooper */ 33158a531400SJon Cooper efx->reset_pending = 0; 33168a531400SJon Cooper rc = efx_pci_probe_post_io(efx); 33178a531400SJon Cooper if (rc) { 33188a531400SJon Cooper /* On another failure, retry once more 33198a531400SJon Cooper * after a 50-305ms delay. 33208a531400SJon Cooper */ 33218a531400SJon Cooper unsigned char r; 33228a531400SJon Cooper 33238a531400SJon Cooper get_random_bytes(&r, 1); 33248a531400SJon Cooper msleep((unsigned int)r + 50); 33258a531400SJon Cooper efx->reset_pending = 0; 33268a531400SJon Cooper rc = efx_pci_probe_post_io(efx); 33278a531400SJon Cooper } 33288a531400SJon Cooper } 3329fadac6aaSBen Hutchings if (rc) 3330874aeea5SJeff Kirsher goto fail3; 3331874aeea5SJeff Kirsher 3332874aeea5SJeff Kirsher netif_dbg(efx, probe, efx->net_dev, "initialisation successful\n"); 3333874aeea5SJeff Kirsher 33347c43161cSBen Hutchings /* Try to create MTDs, but allow this to fail */ 3335874aeea5SJeff Kirsher rtnl_lock(); 33367c43161cSBen Hutchings rc = efx_mtd_probe(efx); 3337874aeea5SJeff Kirsher rtnl_unlock(); 333809a04204SBert Kenward if (rc && rc != -EPERM) 33397c43161cSBen Hutchings netif_warn(efx, probe, efx->net_dev, 33407c43161cSBen Hutchings "failed to create MTDs (%d)\n", rc); 33417c43161cSBen Hutchings 3342626950dbSAlexandre Rames rc = pci_enable_pcie_error_reporting(pci_dev); 3343626950dbSAlexandre Rames if (rc && rc != -EINVAL) 334409a04204SBert Kenward netif_notice(efx, probe, efx->net_dev, 334509a04204SBert Kenward "PCIE error reporting unavailable (%d).\n", 334609a04204SBert Kenward rc); 3347626950dbSAlexandre Rames 3348e5fbd977SJon Cooper if (efx->type->udp_tnl_push_ports) 3349e5fbd977SJon Cooper efx->type->udp_tnl_push_ports(efx); 3350e5fbd977SJon Cooper 3351874aeea5SJeff Kirsher return 0; 3352874aeea5SJeff Kirsher 3353874aeea5SJeff Kirsher fail3: 3354874aeea5SJeff Kirsher efx_fini_io(efx); 3355874aeea5SJeff Kirsher fail2: 3356874aeea5SJeff Kirsher efx_fini_struct(efx); 3357874aeea5SJeff Kirsher fail1: 3358874aeea5SJeff Kirsher WARN_ON(rc > 0); 3359874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "initialisation failed. rc=%d\n", rc); 3360874aeea5SJeff Kirsher free_netdev(net_dev); 3361874aeea5SJeff Kirsher return rc; 3362874aeea5SJeff Kirsher } 3363874aeea5SJeff Kirsher 3364834e23ddSShradha Shah /* efx_pci_sriov_configure returns the actual number of Virtual Functions 3365834e23ddSShradha Shah * enabled on success 3366834e23ddSShradha Shah */ 3367834e23ddSShradha Shah #ifdef CONFIG_SFC_SRIOV 3368834e23ddSShradha Shah static int efx_pci_sriov_configure(struct pci_dev *dev, int num_vfs) 3369834e23ddSShradha Shah { 3370834e23ddSShradha Shah int rc; 3371834e23ddSShradha Shah struct efx_nic *efx = pci_get_drvdata(dev); 3372834e23ddSShradha Shah 3373834e23ddSShradha Shah if (efx->type->sriov_configure) { 3374834e23ddSShradha Shah rc = efx->type->sriov_configure(efx, num_vfs); 3375834e23ddSShradha Shah if (rc) 3376834e23ddSShradha Shah return rc; 3377834e23ddSShradha Shah else 3378834e23ddSShradha Shah return num_vfs; 3379834e23ddSShradha Shah } else 3380834e23ddSShradha Shah return -EOPNOTSUPP; 3381834e23ddSShradha Shah } 3382834e23ddSShradha Shah #endif 3383834e23ddSShradha Shah 3384874aeea5SJeff Kirsher static int efx_pm_freeze(struct device *dev) 3385874aeea5SJeff Kirsher { 3386874aeea5SJeff Kirsher struct efx_nic *efx = pci_get_drvdata(to_pci_dev(dev)); 3387874aeea5SJeff Kirsher 338861da026dSBen Hutchings rtnl_lock(); 338961da026dSBen Hutchings 33906032fb56SBen Hutchings if (efx->state != STATE_DISABLED) { 3391f16aeea0SBen Hutchings efx->state = STATE_UNINIT; 3392874aeea5SJeff Kirsher 3393c2f3b8e3SDaniel Pieczko efx_device_detach_sync(efx); 3394874aeea5SJeff Kirsher 3395874aeea5SJeff Kirsher efx_stop_all(efx); 3396d8291187SBen Hutchings efx_disable_interrupts(efx); 33976032fb56SBen Hutchings } 3398874aeea5SJeff Kirsher 339961da026dSBen Hutchings rtnl_unlock(); 340061da026dSBen Hutchings 3401874aeea5SJeff Kirsher return 0; 3402874aeea5SJeff Kirsher } 3403874aeea5SJeff Kirsher 3404874aeea5SJeff Kirsher static int efx_pm_thaw(struct device *dev) 3405874aeea5SJeff Kirsher { 3406261e4d96SJon Cooper int rc; 3407874aeea5SJeff Kirsher struct efx_nic *efx = pci_get_drvdata(to_pci_dev(dev)); 3408874aeea5SJeff Kirsher 340961da026dSBen Hutchings rtnl_lock(); 341061da026dSBen Hutchings 34116032fb56SBen Hutchings if (efx->state != STATE_DISABLED) { 3412261e4d96SJon Cooper rc = efx_enable_interrupts(efx); 3413261e4d96SJon Cooper if (rc) 3414261e4d96SJon Cooper goto fail; 3415874aeea5SJeff Kirsher 3416874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 3417874aeea5SJeff Kirsher efx->phy_op->reconfigure(efx); 3418874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 3419874aeea5SJeff Kirsher 3420874aeea5SJeff Kirsher efx_start_all(efx); 3421874aeea5SJeff Kirsher 34229c568fd8SPeter Dunning efx_device_attach_if_not_resetting(efx); 3423874aeea5SJeff Kirsher 3424f16aeea0SBen Hutchings efx->state = STATE_READY; 3425874aeea5SJeff Kirsher 3426874aeea5SJeff Kirsher efx->type->resume_wol(efx); 34276032fb56SBen Hutchings } 3428874aeea5SJeff Kirsher 342961da026dSBen Hutchings rtnl_unlock(); 343061da026dSBen Hutchings 3431874aeea5SJeff Kirsher /* Reschedule any quenched resets scheduled during efx_pm_freeze() */ 3432874aeea5SJeff Kirsher queue_work(reset_workqueue, &efx->reset_work); 3433874aeea5SJeff Kirsher 3434874aeea5SJeff Kirsher return 0; 3435261e4d96SJon Cooper 3436261e4d96SJon Cooper fail: 3437261e4d96SJon Cooper rtnl_unlock(); 3438261e4d96SJon Cooper 3439261e4d96SJon Cooper return rc; 3440874aeea5SJeff Kirsher } 3441874aeea5SJeff Kirsher 3442874aeea5SJeff Kirsher static int efx_pm_poweroff(struct device *dev) 3443874aeea5SJeff Kirsher { 3444874aeea5SJeff Kirsher struct pci_dev *pci_dev = to_pci_dev(dev); 3445874aeea5SJeff Kirsher struct efx_nic *efx = pci_get_drvdata(pci_dev); 3446874aeea5SJeff Kirsher 3447874aeea5SJeff Kirsher efx->type->fini(efx); 3448874aeea5SJeff Kirsher 3449874aeea5SJeff Kirsher efx->reset_pending = 0; 3450874aeea5SJeff Kirsher 3451874aeea5SJeff Kirsher pci_save_state(pci_dev); 3452874aeea5SJeff Kirsher return pci_set_power_state(pci_dev, PCI_D3hot); 3453874aeea5SJeff Kirsher } 3454874aeea5SJeff Kirsher 3455874aeea5SJeff Kirsher /* Used for both resume and restore */ 3456874aeea5SJeff Kirsher static int efx_pm_resume(struct device *dev) 3457874aeea5SJeff Kirsher { 3458874aeea5SJeff Kirsher struct pci_dev *pci_dev = to_pci_dev(dev); 3459874aeea5SJeff Kirsher struct efx_nic *efx = pci_get_drvdata(pci_dev); 3460874aeea5SJeff Kirsher int rc; 3461874aeea5SJeff Kirsher 3462874aeea5SJeff Kirsher rc = pci_set_power_state(pci_dev, PCI_D0); 3463874aeea5SJeff Kirsher if (rc) 3464874aeea5SJeff Kirsher return rc; 3465874aeea5SJeff Kirsher pci_restore_state(pci_dev); 3466874aeea5SJeff Kirsher rc = pci_enable_device(pci_dev); 3467874aeea5SJeff Kirsher if (rc) 3468874aeea5SJeff Kirsher return rc; 3469874aeea5SJeff Kirsher pci_set_master(efx->pci_dev); 3470874aeea5SJeff Kirsher rc = efx->type->reset(efx, RESET_TYPE_ALL); 3471874aeea5SJeff Kirsher if (rc) 3472874aeea5SJeff Kirsher return rc; 3473874aeea5SJeff Kirsher rc = efx->type->init(efx); 3474874aeea5SJeff Kirsher if (rc) 3475874aeea5SJeff Kirsher return rc; 3476261e4d96SJon Cooper rc = efx_pm_thaw(dev); 3477261e4d96SJon Cooper return rc; 3478874aeea5SJeff Kirsher } 3479874aeea5SJeff Kirsher 3480874aeea5SJeff Kirsher static int efx_pm_suspend(struct device *dev) 3481874aeea5SJeff Kirsher { 3482874aeea5SJeff Kirsher int rc; 3483874aeea5SJeff Kirsher 3484874aeea5SJeff Kirsher efx_pm_freeze(dev); 3485874aeea5SJeff Kirsher rc = efx_pm_poweroff(dev); 3486874aeea5SJeff Kirsher if (rc) 3487874aeea5SJeff Kirsher efx_pm_resume(dev); 3488874aeea5SJeff Kirsher return rc; 3489874aeea5SJeff Kirsher } 3490874aeea5SJeff Kirsher 349118e83e4cSBen Hutchings static const struct dev_pm_ops efx_pm_ops = { 3492874aeea5SJeff Kirsher .suspend = efx_pm_suspend, 3493874aeea5SJeff Kirsher .resume = efx_pm_resume, 3494874aeea5SJeff Kirsher .freeze = efx_pm_freeze, 3495874aeea5SJeff Kirsher .thaw = efx_pm_thaw, 3496874aeea5SJeff Kirsher .poweroff = efx_pm_poweroff, 3497874aeea5SJeff Kirsher .restore = efx_pm_resume, 3498874aeea5SJeff Kirsher }; 3499874aeea5SJeff Kirsher 3500626950dbSAlexandre Rames /* A PCI error affecting this device was detected. 3501626950dbSAlexandre Rames * At this point MMIO and DMA may be disabled. 3502626950dbSAlexandre Rames * Stop the software path and request a slot reset. 3503626950dbSAlexandre Rames */ 3504debd0034Sstephen hemminger static pci_ers_result_t efx_io_error_detected(struct pci_dev *pdev, 3505626950dbSAlexandre Rames enum pci_channel_state state) 3506626950dbSAlexandre Rames { 3507626950dbSAlexandre Rames pci_ers_result_t status = PCI_ERS_RESULT_RECOVERED; 3508626950dbSAlexandre Rames struct efx_nic *efx = pci_get_drvdata(pdev); 3509626950dbSAlexandre Rames 3510626950dbSAlexandre Rames if (state == pci_channel_io_perm_failure) 3511626950dbSAlexandre Rames return PCI_ERS_RESULT_DISCONNECT; 3512626950dbSAlexandre Rames 3513626950dbSAlexandre Rames rtnl_lock(); 3514626950dbSAlexandre Rames 3515626950dbSAlexandre Rames if (efx->state != STATE_DISABLED) { 3516626950dbSAlexandre Rames efx->state = STATE_RECOVERY; 3517626950dbSAlexandre Rames efx->reset_pending = 0; 3518626950dbSAlexandre Rames 3519626950dbSAlexandre Rames efx_device_detach_sync(efx); 3520626950dbSAlexandre Rames 3521626950dbSAlexandre Rames efx_stop_all(efx); 3522d8291187SBen Hutchings efx_disable_interrupts(efx); 3523626950dbSAlexandre Rames 3524626950dbSAlexandre Rames status = PCI_ERS_RESULT_NEED_RESET; 3525626950dbSAlexandre Rames } else { 3526626950dbSAlexandre Rames /* If the interface is disabled we don't want to do anything 3527626950dbSAlexandre Rames * with it. 3528626950dbSAlexandre Rames */ 3529626950dbSAlexandre Rames status = PCI_ERS_RESULT_RECOVERED; 3530626950dbSAlexandre Rames } 3531626950dbSAlexandre Rames 3532626950dbSAlexandre Rames rtnl_unlock(); 3533626950dbSAlexandre Rames 3534626950dbSAlexandre Rames pci_disable_device(pdev); 3535626950dbSAlexandre Rames 3536626950dbSAlexandre Rames return status; 3537626950dbSAlexandre Rames } 3538626950dbSAlexandre Rames 3539dbedd44eSJoe Perches /* Fake a successful reset, which will be performed later in efx_io_resume. */ 3540debd0034Sstephen hemminger static pci_ers_result_t efx_io_slot_reset(struct pci_dev *pdev) 3541626950dbSAlexandre Rames { 3542626950dbSAlexandre Rames struct efx_nic *efx = pci_get_drvdata(pdev); 3543626950dbSAlexandre Rames pci_ers_result_t status = PCI_ERS_RESULT_RECOVERED; 3544626950dbSAlexandre Rames int rc; 3545626950dbSAlexandre Rames 3546626950dbSAlexandre Rames if (pci_enable_device(pdev)) { 3547626950dbSAlexandre Rames netif_err(efx, hw, efx->net_dev, 3548626950dbSAlexandre Rames "Cannot re-enable PCI device after reset.\n"); 3549626950dbSAlexandre Rames status = PCI_ERS_RESULT_DISCONNECT; 3550626950dbSAlexandre Rames } 3551626950dbSAlexandre Rames 3552626950dbSAlexandre Rames rc = pci_cleanup_aer_uncorrect_error_status(pdev); 3553626950dbSAlexandre Rames if (rc) { 3554626950dbSAlexandre Rames netif_err(efx, hw, efx->net_dev, 3555626950dbSAlexandre Rames "pci_cleanup_aer_uncorrect_error_status failed (%d)\n", rc); 3556626950dbSAlexandre Rames /* Non-fatal error. Continue. */ 3557626950dbSAlexandre Rames } 3558626950dbSAlexandre Rames 3559626950dbSAlexandre Rames return status; 3560626950dbSAlexandre Rames } 3561626950dbSAlexandre Rames 3562626950dbSAlexandre Rames /* Perform the actual reset and resume I/O operations. */ 3563626950dbSAlexandre Rames static void efx_io_resume(struct pci_dev *pdev) 3564626950dbSAlexandre Rames { 3565626950dbSAlexandre Rames struct efx_nic *efx = pci_get_drvdata(pdev); 3566626950dbSAlexandre Rames int rc; 3567626950dbSAlexandre Rames 3568626950dbSAlexandre Rames rtnl_lock(); 3569626950dbSAlexandre Rames 3570626950dbSAlexandre Rames if (efx->state == STATE_DISABLED) 3571626950dbSAlexandre Rames goto out; 3572626950dbSAlexandre Rames 3573626950dbSAlexandre Rames rc = efx_reset(efx, RESET_TYPE_ALL); 3574626950dbSAlexandre Rames if (rc) { 3575626950dbSAlexandre Rames netif_err(efx, hw, efx->net_dev, 3576626950dbSAlexandre Rames "efx_reset failed after PCI error (%d)\n", rc); 3577626950dbSAlexandre Rames } else { 3578626950dbSAlexandre Rames efx->state = STATE_READY; 3579626950dbSAlexandre Rames netif_dbg(efx, hw, efx->net_dev, 3580626950dbSAlexandre Rames "Done resetting and resuming IO after PCI error.\n"); 3581626950dbSAlexandre Rames } 3582626950dbSAlexandre Rames 3583626950dbSAlexandre Rames out: 3584626950dbSAlexandre Rames rtnl_unlock(); 3585626950dbSAlexandre Rames } 3586626950dbSAlexandre Rames 3587626950dbSAlexandre Rames /* For simplicity and reliability, we always require a slot reset and try to 3588626950dbSAlexandre Rames * reset the hardware when a pci error affecting the device is detected. 3589626950dbSAlexandre Rames * We leave both the link_reset and mmio_enabled callback unimplemented: 3590626950dbSAlexandre Rames * with our request for slot reset the mmio_enabled callback will never be 3591626950dbSAlexandre Rames * called, and the link_reset callback is not used by AER or EEH mechanisms. 3592626950dbSAlexandre Rames */ 3593c300366bSJulia Lawall static const struct pci_error_handlers efx_err_handlers = { 3594626950dbSAlexandre Rames .error_detected = efx_io_error_detected, 3595626950dbSAlexandre Rames .slot_reset = efx_io_slot_reset, 3596626950dbSAlexandre Rames .resume = efx_io_resume, 3597626950dbSAlexandre Rames }; 3598626950dbSAlexandre Rames 3599874aeea5SJeff Kirsher static struct pci_driver efx_pci_driver = { 3600874aeea5SJeff Kirsher .name = KBUILD_MODNAME, 3601874aeea5SJeff Kirsher .id_table = efx_pci_table, 3602874aeea5SJeff Kirsher .probe = efx_pci_probe, 3603874aeea5SJeff Kirsher .remove = efx_pci_remove, 3604874aeea5SJeff Kirsher .driver.pm = &efx_pm_ops, 3605626950dbSAlexandre Rames .err_handler = &efx_err_handlers, 3606834e23ddSShradha Shah #ifdef CONFIG_SFC_SRIOV 3607834e23ddSShradha Shah .sriov_configure = efx_pci_sriov_configure, 3608834e23ddSShradha Shah #endif 3609874aeea5SJeff Kirsher }; 3610874aeea5SJeff Kirsher 3611874aeea5SJeff Kirsher /************************************************************************** 3612874aeea5SJeff Kirsher * 3613874aeea5SJeff Kirsher * Kernel module interface 3614874aeea5SJeff Kirsher * 3615874aeea5SJeff Kirsher *************************************************************************/ 3616874aeea5SJeff Kirsher 3617874aeea5SJeff Kirsher module_param(interrupt_mode, uint, 0444); 3618874aeea5SJeff Kirsher MODULE_PARM_DESC(interrupt_mode, 3619874aeea5SJeff Kirsher "Interrupt mode (0=>MSIX 1=>MSI 2=>legacy)"); 3620874aeea5SJeff Kirsher 3621874aeea5SJeff Kirsher static int __init efx_init_module(void) 3622874aeea5SJeff Kirsher { 3623874aeea5SJeff Kirsher int rc; 3624874aeea5SJeff Kirsher 3625874aeea5SJeff Kirsher printk(KERN_INFO "Solarflare NET driver v" EFX_DRIVER_VERSION "\n"); 3626874aeea5SJeff Kirsher 3627874aeea5SJeff Kirsher rc = register_netdevice_notifier(&efx_netdev_notifier); 3628874aeea5SJeff Kirsher if (rc) 3629874aeea5SJeff Kirsher goto err_notifier; 3630874aeea5SJeff Kirsher 36317fa8d547SShradha Shah #ifdef CONFIG_SFC_SRIOV 3632cd2d5b52SBen Hutchings rc = efx_init_sriov(); 3633cd2d5b52SBen Hutchings if (rc) 3634cd2d5b52SBen Hutchings goto err_sriov; 36357fa8d547SShradha Shah #endif 3636cd2d5b52SBen Hutchings 3637874aeea5SJeff Kirsher reset_workqueue = create_singlethread_workqueue("sfc_reset"); 3638874aeea5SJeff Kirsher if (!reset_workqueue) { 3639874aeea5SJeff Kirsher rc = -ENOMEM; 3640874aeea5SJeff Kirsher goto err_reset; 3641874aeea5SJeff Kirsher } 3642874aeea5SJeff Kirsher 3643874aeea5SJeff Kirsher rc = pci_register_driver(&efx_pci_driver); 3644874aeea5SJeff Kirsher if (rc < 0) 3645874aeea5SJeff Kirsher goto err_pci; 3646874aeea5SJeff Kirsher 3647874aeea5SJeff Kirsher return 0; 3648874aeea5SJeff Kirsher 3649874aeea5SJeff Kirsher err_pci: 3650874aeea5SJeff Kirsher destroy_workqueue(reset_workqueue); 3651874aeea5SJeff Kirsher err_reset: 36527fa8d547SShradha Shah #ifdef CONFIG_SFC_SRIOV 3653cd2d5b52SBen Hutchings efx_fini_sriov(); 3654cd2d5b52SBen Hutchings err_sriov: 36557fa8d547SShradha Shah #endif 3656874aeea5SJeff Kirsher unregister_netdevice_notifier(&efx_netdev_notifier); 3657874aeea5SJeff Kirsher err_notifier: 3658874aeea5SJeff Kirsher return rc; 3659874aeea5SJeff Kirsher } 3660874aeea5SJeff Kirsher 3661874aeea5SJeff Kirsher static void __exit efx_exit_module(void) 3662874aeea5SJeff Kirsher { 3663874aeea5SJeff Kirsher printk(KERN_INFO "Solarflare NET driver unloading\n"); 3664874aeea5SJeff Kirsher 3665874aeea5SJeff Kirsher pci_unregister_driver(&efx_pci_driver); 3666874aeea5SJeff Kirsher destroy_workqueue(reset_workqueue); 36677fa8d547SShradha Shah #ifdef CONFIG_SFC_SRIOV 3668cd2d5b52SBen Hutchings efx_fini_sriov(); 36697fa8d547SShradha Shah #endif 3670874aeea5SJeff Kirsher unregister_netdevice_notifier(&efx_netdev_notifier); 3671874aeea5SJeff Kirsher 3672874aeea5SJeff Kirsher } 3673874aeea5SJeff Kirsher 3674874aeea5SJeff Kirsher module_init(efx_init_module); 3675874aeea5SJeff Kirsher module_exit(efx_exit_module); 3676874aeea5SJeff Kirsher 3677874aeea5SJeff Kirsher MODULE_AUTHOR("Solarflare Communications and " 3678874aeea5SJeff Kirsher "Michael Brown <mbrown@fensystems.co.uk>"); 36796a350fdbSBen Hutchings MODULE_DESCRIPTION("Solarflare network driver"); 3680874aeea5SJeff Kirsher MODULE_LICENSE("GPL"); 3681874aeea5SJeff Kirsher MODULE_DEVICE_TABLE(pci, efx_pci_table); 368214077e9eSEdward Cree MODULE_VERSION(EFX_DRIVER_VERSION); 3683