1874aeea5SJeff Kirsher /**************************************************************************** 2f7a6d2c4SBen Hutchings * Driver for Solarflare network controllers and boards 3874aeea5SJeff Kirsher * Copyright 2005-2006 Fen Systems Ltd. 4f7a6d2c4SBen Hutchings * Copyright 2005-2013 Solarflare Communications Inc. 5874aeea5SJeff Kirsher * 6874aeea5SJeff Kirsher * This program is free software; you can redistribute it and/or modify it 7874aeea5SJeff Kirsher * under the terms of the GNU General Public License version 2 as published 8874aeea5SJeff Kirsher * by the Free Software Foundation, incorporated herein by reference. 9874aeea5SJeff Kirsher */ 10874aeea5SJeff Kirsher 11874aeea5SJeff Kirsher #include <linux/module.h> 12874aeea5SJeff Kirsher #include <linux/pci.h> 13874aeea5SJeff Kirsher #include <linux/netdevice.h> 14874aeea5SJeff Kirsher #include <linux/etherdevice.h> 15874aeea5SJeff Kirsher #include <linux/delay.h> 16874aeea5SJeff Kirsher #include <linux/notifier.h> 17874aeea5SJeff Kirsher #include <linux/ip.h> 18874aeea5SJeff Kirsher #include <linux/tcp.h> 19874aeea5SJeff Kirsher #include <linux/in.h> 20874aeea5SJeff Kirsher #include <linux/ethtool.h> 21874aeea5SJeff Kirsher #include <linux/topology.h> 22874aeea5SJeff Kirsher #include <linux/gfp.h> 23626950dbSAlexandre Rames #include <linux/aer.h> 24b28405b0SAlexandre Rames #include <linux/interrupt.h> 25874aeea5SJeff Kirsher #include "net_driver.h" 26e5fbd977SJon Cooper #include <net/gre.h> 27e5fbd977SJon Cooper #include <net/udp_tunnel.h> 28874aeea5SJeff Kirsher #include "efx.h" 29874aeea5SJeff Kirsher #include "nic.h" 3071827443SEdward Cree #include "io.h" 31dd40781eSBen Hutchings #include "selftest.h" 327fa8d547SShradha Shah #include "sriov.h" 33874aeea5SJeff Kirsher 34874aeea5SJeff Kirsher #include "mcdi.h" 35e5fbd977SJon Cooper #include "mcdi_pcol.h" 36874aeea5SJeff Kirsher #include "workarounds.h" 37874aeea5SJeff Kirsher 38874aeea5SJeff Kirsher /************************************************************************** 39874aeea5SJeff Kirsher * 40874aeea5SJeff Kirsher * Type name strings 41874aeea5SJeff Kirsher * 42874aeea5SJeff Kirsher ************************************************************************** 43874aeea5SJeff Kirsher */ 44874aeea5SJeff Kirsher 45874aeea5SJeff Kirsher /* Loopback mode names (see LOOPBACK_MODE()) */ 46874aeea5SJeff Kirsher const unsigned int efx_loopback_mode_max = LOOPBACK_MAX; 4718e83e4cSBen Hutchings const char *const efx_loopback_mode_names[] = { 48874aeea5SJeff Kirsher [LOOPBACK_NONE] = "NONE", 49874aeea5SJeff Kirsher [LOOPBACK_DATA] = "DATAPATH", 50874aeea5SJeff Kirsher [LOOPBACK_GMAC] = "GMAC", 51874aeea5SJeff Kirsher [LOOPBACK_XGMII] = "XGMII", 52874aeea5SJeff Kirsher [LOOPBACK_XGXS] = "XGXS", 53874aeea5SJeff Kirsher [LOOPBACK_XAUI] = "XAUI", 54874aeea5SJeff Kirsher [LOOPBACK_GMII] = "GMII", 55874aeea5SJeff Kirsher [LOOPBACK_SGMII] = "SGMII", 56874aeea5SJeff Kirsher [LOOPBACK_XGBR] = "XGBR", 57874aeea5SJeff Kirsher [LOOPBACK_XFI] = "XFI", 58874aeea5SJeff Kirsher [LOOPBACK_XAUI_FAR] = "XAUI_FAR", 59874aeea5SJeff Kirsher [LOOPBACK_GMII_FAR] = "GMII_FAR", 60874aeea5SJeff Kirsher [LOOPBACK_SGMII_FAR] = "SGMII_FAR", 61874aeea5SJeff Kirsher [LOOPBACK_XFI_FAR] = "XFI_FAR", 62874aeea5SJeff Kirsher [LOOPBACK_GPHY] = "GPHY", 63874aeea5SJeff Kirsher [LOOPBACK_PHYXS] = "PHYXS", 64874aeea5SJeff Kirsher [LOOPBACK_PCS] = "PCS", 65874aeea5SJeff Kirsher [LOOPBACK_PMAPMD] = "PMA/PMD", 66874aeea5SJeff Kirsher [LOOPBACK_XPORT] = "XPORT", 67874aeea5SJeff Kirsher [LOOPBACK_XGMII_WS] = "XGMII_WS", 68874aeea5SJeff Kirsher [LOOPBACK_XAUI_WS] = "XAUI_WS", 69874aeea5SJeff Kirsher [LOOPBACK_XAUI_WS_FAR] = "XAUI_WS_FAR", 70874aeea5SJeff Kirsher [LOOPBACK_XAUI_WS_NEAR] = "XAUI_WS_NEAR", 71874aeea5SJeff Kirsher [LOOPBACK_GMII_WS] = "GMII_WS", 72874aeea5SJeff Kirsher [LOOPBACK_XFI_WS] = "XFI_WS", 73874aeea5SJeff Kirsher [LOOPBACK_XFI_WS_FAR] = "XFI_WS_FAR", 74874aeea5SJeff Kirsher [LOOPBACK_PHYXS_WS] = "PHYXS_WS", 75874aeea5SJeff Kirsher }; 76874aeea5SJeff Kirsher 77874aeea5SJeff Kirsher const unsigned int efx_reset_type_max = RESET_TYPE_MAX; 7818e83e4cSBen Hutchings const char *const efx_reset_type_names[] = { 79874aeea5SJeff Kirsher [RESET_TYPE_INVISIBLE] = "INVISIBLE", 80874aeea5SJeff Kirsher [RESET_TYPE_ALL] = "ALL", 81626950dbSAlexandre Rames [RESET_TYPE_RECOVER_OR_ALL] = "RECOVER_OR_ALL", 82874aeea5SJeff Kirsher [RESET_TYPE_WORLD] = "WORLD", 83626950dbSAlexandre Rames [RESET_TYPE_RECOVER_OR_DISABLE] = "RECOVER_OR_DISABLE", 84087e9025SJon Cooper [RESET_TYPE_DATAPATH] = "DATAPATH", 85e283546cSEdward Cree [RESET_TYPE_MC_BIST] = "MC_BIST", 86874aeea5SJeff Kirsher [RESET_TYPE_DISABLE] = "DISABLE", 87874aeea5SJeff Kirsher [RESET_TYPE_TX_WATCHDOG] = "TX_WATCHDOG", 88874aeea5SJeff Kirsher [RESET_TYPE_INT_ERROR] = "INT_ERROR", 893de82b91SAlexandre Rames [RESET_TYPE_DMA_ERROR] = "DMA_ERROR", 90874aeea5SJeff Kirsher [RESET_TYPE_TX_SKIP] = "TX_SKIP", 91874aeea5SJeff Kirsher [RESET_TYPE_MC_FAILURE] = "MC_FAILURE", 92e283546cSEdward Cree [RESET_TYPE_MCDI_TIMEOUT] = "MCDI_TIMEOUT (FLR)", 93874aeea5SJeff Kirsher }; 94874aeea5SJeff Kirsher 95e5fbd977SJon Cooper /* UDP tunnel type names */ 96e5fbd977SJon Cooper static const char *const efx_udp_tunnel_type_names[] = { 97e5fbd977SJon Cooper [TUNNEL_ENCAP_UDP_PORT_ENTRY_VXLAN] = "vxlan", 98e5fbd977SJon Cooper [TUNNEL_ENCAP_UDP_PORT_ENTRY_GENEVE] = "geneve", 99e5fbd977SJon Cooper }; 100e5fbd977SJon Cooper 101e5fbd977SJon Cooper void efx_get_udp_tunnel_type_name(u16 type, char *buf, size_t buflen) 102e5fbd977SJon Cooper { 103e5fbd977SJon Cooper if (type < ARRAY_SIZE(efx_udp_tunnel_type_names) && 104e5fbd977SJon Cooper efx_udp_tunnel_type_names[type] != NULL) 105e5fbd977SJon Cooper snprintf(buf, buflen, "%s", efx_udp_tunnel_type_names[type]); 106e5fbd977SJon Cooper else 107e5fbd977SJon Cooper snprintf(buf, buflen, "type %d", type); 108e5fbd977SJon Cooper } 109e5fbd977SJon Cooper 110874aeea5SJeff Kirsher /* Reset workqueue. If any NIC has a hardware failure then a reset will be 111874aeea5SJeff Kirsher * queued onto this work queue. This is not a per-nic work queue, because 112874aeea5SJeff Kirsher * efx_reset_work() acquires the rtnl lock, so resets are naturally serialised. 113874aeea5SJeff Kirsher */ 114874aeea5SJeff Kirsher static struct workqueue_struct *reset_workqueue; 115874aeea5SJeff Kirsher 11674cd60a4SJon Cooper /* How often and how many times to poll for a reset while waiting for a 11774cd60a4SJon Cooper * BIST that another function started to complete. 11874cd60a4SJon Cooper */ 11974cd60a4SJon Cooper #define BIST_WAIT_DELAY_MS 100 12074cd60a4SJon Cooper #define BIST_WAIT_DELAY_COUNT 100 12174cd60a4SJon Cooper 122874aeea5SJeff Kirsher /************************************************************************** 123874aeea5SJeff Kirsher * 124874aeea5SJeff Kirsher * Configurable values 125874aeea5SJeff Kirsher * 126874aeea5SJeff Kirsher *************************************************************************/ 127874aeea5SJeff Kirsher 128874aeea5SJeff Kirsher /* 129874aeea5SJeff Kirsher * Use separate channels for TX and RX events 130874aeea5SJeff Kirsher * 131874aeea5SJeff Kirsher * Set this to 1 to use separate channels for TX and RX. It allows us 132874aeea5SJeff Kirsher * to control interrupt affinity separately for TX and RX. 133874aeea5SJeff Kirsher * 134874aeea5SJeff Kirsher * This is only used in MSI-X interrupt mode 135874aeea5SJeff Kirsher */ 136b0fbdae1SShradha Shah bool efx_separate_tx_channels; 137b0fbdae1SShradha Shah module_param(efx_separate_tx_channels, bool, 0444); 138b0fbdae1SShradha Shah MODULE_PARM_DESC(efx_separate_tx_channels, 139874aeea5SJeff Kirsher "Use separate channels for TX and RX"); 140874aeea5SJeff Kirsher 141874aeea5SJeff Kirsher /* This is the weight assigned to each of the (per-channel) virtual 142874aeea5SJeff Kirsher * NAPI devices. 143874aeea5SJeff Kirsher */ 144874aeea5SJeff Kirsher static int napi_weight = 64; 145874aeea5SJeff Kirsher 146874aeea5SJeff Kirsher /* This is the time (in jiffies) between invocations of the hardware 147626950dbSAlexandre Rames * monitor. 148626950dbSAlexandre Rames * On Falcon-based NICs, this will: 149874aeea5SJeff Kirsher * - Check the on-board hardware monitor; 150874aeea5SJeff Kirsher * - Poll the link state and reconfigure the hardware as necessary. 151626950dbSAlexandre Rames * On Siena-based NICs for power systems with EEH support, this will give EEH a 152626950dbSAlexandre Rames * chance to start. 153874aeea5SJeff Kirsher */ 154874aeea5SJeff Kirsher static unsigned int efx_monitor_interval = 1 * HZ; 155874aeea5SJeff Kirsher 156874aeea5SJeff Kirsher /* Initial interrupt moderation settings. They can be modified after 157874aeea5SJeff Kirsher * module load with ethtool. 158874aeea5SJeff Kirsher * 159874aeea5SJeff Kirsher * The default for RX should strike a balance between increasing the 160874aeea5SJeff Kirsher * round-trip latency and reducing overhead. 161874aeea5SJeff Kirsher */ 162874aeea5SJeff Kirsher static unsigned int rx_irq_mod_usec = 60; 163874aeea5SJeff Kirsher 164874aeea5SJeff Kirsher /* Initial interrupt moderation settings. They can be modified after 165874aeea5SJeff Kirsher * module load with ethtool. 166874aeea5SJeff Kirsher * 167874aeea5SJeff Kirsher * This default is chosen to ensure that a 10G link does not go idle 168874aeea5SJeff Kirsher * while a TX queue is stopped after it has become full. A queue is 169874aeea5SJeff Kirsher * restarted when it drops below half full. The time this takes (assuming 170874aeea5SJeff Kirsher * worst case 3 descriptors per packet and 1024 descriptors) is 171874aeea5SJeff Kirsher * 512 / 3 * 1.2 = 205 usec. 172874aeea5SJeff Kirsher */ 173874aeea5SJeff Kirsher static unsigned int tx_irq_mod_usec = 150; 174874aeea5SJeff Kirsher 175874aeea5SJeff Kirsher /* This is the first interrupt mode to try out of: 176874aeea5SJeff Kirsher * 0 => MSI-X 177874aeea5SJeff Kirsher * 1 => MSI 178874aeea5SJeff Kirsher * 2 => legacy 179874aeea5SJeff Kirsher */ 180874aeea5SJeff Kirsher static unsigned int interrupt_mode; 181874aeea5SJeff Kirsher 182874aeea5SJeff Kirsher /* This is the requested number of CPUs to use for Receive-Side Scaling (RSS), 183874aeea5SJeff Kirsher * i.e. the number of CPUs among which we may distribute simultaneous 184874aeea5SJeff Kirsher * interrupt handling. 185874aeea5SJeff Kirsher * 186874aeea5SJeff Kirsher * Cards without MSI-X will only target one CPU via legacy or MSI interrupt. 187cdb08f8fSBen Hutchings * The default (0) means to assign an interrupt to each core. 188874aeea5SJeff Kirsher */ 189874aeea5SJeff Kirsher static unsigned int rss_cpus; 190874aeea5SJeff Kirsher module_param(rss_cpus, uint, 0444); 191874aeea5SJeff Kirsher MODULE_PARM_DESC(rss_cpus, "Number of CPUs to use for Receive-Side Scaling"); 192874aeea5SJeff Kirsher 193b9cc977dSBen Hutchings static bool phy_flash_cfg; 194b9cc977dSBen Hutchings module_param(phy_flash_cfg, bool, 0644); 195874aeea5SJeff Kirsher MODULE_PARM_DESC(phy_flash_cfg, "Set PHYs into reflash mode initially"); 196874aeea5SJeff Kirsher 197e7bed9c8SBen Hutchings static unsigned irq_adapt_low_thresh = 8000; 198874aeea5SJeff Kirsher module_param(irq_adapt_low_thresh, uint, 0644); 199874aeea5SJeff Kirsher MODULE_PARM_DESC(irq_adapt_low_thresh, 200874aeea5SJeff Kirsher "Threshold score for reducing IRQ moderation"); 201874aeea5SJeff Kirsher 202e7bed9c8SBen Hutchings static unsigned irq_adapt_high_thresh = 16000; 203874aeea5SJeff Kirsher module_param(irq_adapt_high_thresh, uint, 0644); 204874aeea5SJeff Kirsher MODULE_PARM_DESC(irq_adapt_high_thresh, 205874aeea5SJeff Kirsher "Threshold score for increasing IRQ moderation"); 206874aeea5SJeff Kirsher 207874aeea5SJeff Kirsher static unsigned debug = (NETIF_MSG_DRV | NETIF_MSG_PROBE | 208874aeea5SJeff Kirsher NETIF_MSG_LINK | NETIF_MSG_IFDOWN | 209874aeea5SJeff Kirsher NETIF_MSG_IFUP | NETIF_MSG_RX_ERR | 210874aeea5SJeff Kirsher NETIF_MSG_TX_ERR | NETIF_MSG_HW); 211874aeea5SJeff Kirsher module_param(debug, uint, 0); 212874aeea5SJeff Kirsher MODULE_PARM_DESC(debug, "Bitmapped debugging message enable value"); 213874aeea5SJeff Kirsher 214874aeea5SJeff Kirsher /************************************************************************** 215874aeea5SJeff Kirsher * 216874aeea5SJeff Kirsher * Utility functions and prototypes 217874aeea5SJeff Kirsher * 218874aeea5SJeff Kirsher *************************************************************************/ 219874aeea5SJeff Kirsher 220261e4d96SJon Cooper static int efx_soft_enable_interrupts(struct efx_nic *efx); 221d8291187SBen Hutchings static void efx_soft_disable_interrupts(struct efx_nic *efx); 2227f967c01SBen Hutchings static void efx_remove_channel(struct efx_channel *channel); 223874aeea5SJeff Kirsher static void efx_remove_channels(struct efx_nic *efx); 2247f967c01SBen Hutchings static const struct efx_channel_type efx_default_channel_type; 225874aeea5SJeff Kirsher static void efx_remove_port(struct efx_nic *efx); 2267f967c01SBen Hutchings static void efx_init_napi_channel(struct efx_channel *channel); 227874aeea5SJeff Kirsher static void efx_fini_napi(struct efx_nic *efx); 228874aeea5SJeff Kirsher static void efx_fini_napi_channel(struct efx_channel *channel); 229874aeea5SJeff Kirsher static void efx_fini_struct(struct efx_nic *efx); 230874aeea5SJeff Kirsher static void efx_start_all(struct efx_nic *efx); 231874aeea5SJeff Kirsher static void efx_stop_all(struct efx_nic *efx); 232874aeea5SJeff Kirsher 233874aeea5SJeff Kirsher #define EFX_ASSERT_RESET_SERIALISED(efx) \ 234874aeea5SJeff Kirsher do { \ 235f16aeea0SBen Hutchings if ((efx->state == STATE_READY) || \ 236626950dbSAlexandre Rames (efx->state == STATE_RECOVERY) || \ 237874aeea5SJeff Kirsher (efx->state == STATE_DISABLED)) \ 238874aeea5SJeff Kirsher ASSERT_RTNL(); \ 239874aeea5SJeff Kirsher } while (0) 240874aeea5SJeff Kirsher 2418b7325b4SBen Hutchings static int efx_check_disabled(struct efx_nic *efx) 2428b7325b4SBen Hutchings { 243626950dbSAlexandre Rames if (efx->state == STATE_DISABLED || efx->state == STATE_RECOVERY) { 2448b7325b4SBen Hutchings netif_err(efx, drv, efx->net_dev, 2458b7325b4SBen Hutchings "device is disabled due to earlier errors\n"); 2468b7325b4SBen Hutchings return -EIO; 2478b7325b4SBen Hutchings } 2488b7325b4SBen Hutchings return 0; 2498b7325b4SBen Hutchings } 2508b7325b4SBen Hutchings 251874aeea5SJeff Kirsher /************************************************************************** 252874aeea5SJeff Kirsher * 253874aeea5SJeff Kirsher * Event queue processing 254874aeea5SJeff Kirsher * 255874aeea5SJeff Kirsher *************************************************************************/ 256874aeea5SJeff Kirsher 257874aeea5SJeff Kirsher /* Process channel's event queue 258874aeea5SJeff Kirsher * 259874aeea5SJeff Kirsher * This function is responsible for processing the event queue of a 260874aeea5SJeff Kirsher * single channel. The caller must guarantee that this function will 261874aeea5SJeff Kirsher * never be concurrently called more than once on the same channel, 262874aeea5SJeff Kirsher * though different channels may be being processed concurrently. 263874aeea5SJeff Kirsher */ 264874aeea5SJeff Kirsher static int efx_process_channel(struct efx_channel *channel, int budget) 265874aeea5SJeff Kirsher { 266c936835cSPeter Dunning struct efx_tx_queue *tx_queue; 267874aeea5SJeff Kirsher int spent; 268874aeea5SJeff Kirsher 2699f2cb71cSBen Hutchings if (unlikely(!channel->enabled)) 270874aeea5SJeff Kirsher return 0; 271874aeea5SJeff Kirsher 272c936835cSPeter Dunning efx_for_each_channel_tx_queue(tx_queue, channel) { 273c936835cSPeter Dunning tx_queue->pkts_compl = 0; 274c936835cSPeter Dunning tx_queue->bytes_compl = 0; 275c936835cSPeter Dunning } 276c936835cSPeter Dunning 277874aeea5SJeff Kirsher spent = efx_nic_process_eventq(channel, budget); 278d9ab7007SBen Hutchings if (spent && efx_channel_has_rx_queue(channel)) { 279d9ab7007SBen Hutchings struct efx_rx_queue *rx_queue = 280d9ab7007SBen Hutchings efx_channel_get_rx_queue(channel); 281874aeea5SJeff Kirsher 282ff734ef4SBen Hutchings efx_rx_flush_packet(channel); 283cce28794SJon Cooper efx_fast_push_rx_descriptors(rx_queue, true); 284d9ab7007SBen Hutchings } 285874aeea5SJeff Kirsher 286c936835cSPeter Dunning /* Update BQL */ 287c936835cSPeter Dunning efx_for_each_channel_tx_queue(tx_queue, channel) { 288c936835cSPeter Dunning if (tx_queue->bytes_compl) { 289c936835cSPeter Dunning netdev_tx_completed_queue(tx_queue->core_txq, 290c936835cSPeter Dunning tx_queue->pkts_compl, tx_queue->bytes_compl); 291c936835cSPeter Dunning } 292c936835cSPeter Dunning } 293c936835cSPeter Dunning 294874aeea5SJeff Kirsher return spent; 295874aeea5SJeff Kirsher } 296874aeea5SJeff Kirsher 297874aeea5SJeff Kirsher /* NAPI poll handler 298874aeea5SJeff Kirsher * 299874aeea5SJeff Kirsher * NAPI guarantees serialisation of polls of the same device, which 300874aeea5SJeff Kirsher * provides the guarantee required by efx_process_channel(). 301874aeea5SJeff Kirsher */ 302539de7c5SBert Kenward static void efx_update_irq_mod(struct efx_nic *efx, struct efx_channel *channel) 303539de7c5SBert Kenward { 304539de7c5SBert Kenward int step = efx->irq_mod_step_us; 305539de7c5SBert Kenward 306539de7c5SBert Kenward if (channel->irq_mod_score < irq_adapt_low_thresh) { 307539de7c5SBert Kenward if (channel->irq_moderation_us > step) { 308539de7c5SBert Kenward channel->irq_moderation_us -= step; 309539de7c5SBert Kenward efx->type->push_irq_moderation(channel); 310539de7c5SBert Kenward } 311539de7c5SBert Kenward } else if (channel->irq_mod_score > irq_adapt_high_thresh) { 312539de7c5SBert Kenward if (channel->irq_moderation_us < 313539de7c5SBert Kenward efx->irq_rx_moderation_us) { 314539de7c5SBert Kenward channel->irq_moderation_us += step; 315539de7c5SBert Kenward efx->type->push_irq_moderation(channel); 316539de7c5SBert Kenward } 317539de7c5SBert Kenward } 318539de7c5SBert Kenward 319539de7c5SBert Kenward channel->irq_count = 0; 320539de7c5SBert Kenward channel->irq_mod_score = 0; 321539de7c5SBert Kenward } 322539de7c5SBert Kenward 323874aeea5SJeff Kirsher static int efx_poll(struct napi_struct *napi, int budget) 324874aeea5SJeff Kirsher { 325874aeea5SJeff Kirsher struct efx_channel *channel = 326874aeea5SJeff Kirsher container_of(napi, struct efx_channel, napi_str); 327874aeea5SJeff Kirsher struct efx_nic *efx = channel->efx; 328874aeea5SJeff Kirsher int spent; 329874aeea5SJeff Kirsher 330874aeea5SJeff Kirsher netif_vdbg(efx, intr, efx->net_dev, 331874aeea5SJeff Kirsher "channel %d NAPI poll executing on CPU %d\n", 332874aeea5SJeff Kirsher channel->channel, raw_smp_processor_id()); 333874aeea5SJeff Kirsher 334874aeea5SJeff Kirsher spent = efx_process_channel(channel, budget); 335874aeea5SJeff Kirsher 336874aeea5SJeff Kirsher if (spent < budget) { 3379d9a6973SBen Hutchings if (efx_channel_has_rx_queue(channel) && 338874aeea5SJeff Kirsher efx->irq_rx_adaptive && 339874aeea5SJeff Kirsher unlikely(++channel->irq_count == 1000)) { 340539de7c5SBert Kenward efx_update_irq_mod(efx, channel); 341874aeea5SJeff Kirsher } 342874aeea5SJeff Kirsher 3433af0f342SEdward Cree #ifdef CONFIG_RFS_ACCEL 3443af0f342SEdward Cree /* Perhaps expire some ARFS filters */ 3453af0f342SEdward Cree schedule_work(&channel->filter_work); 3463af0f342SEdward Cree #endif 347874aeea5SJeff Kirsher 348874aeea5SJeff Kirsher /* There is no race here; although napi_disable() will 349874aeea5SJeff Kirsher * only wait for napi_complete(), this isn't a problem 350514bedbcSBen Hutchings * since efx_nic_eventq_read_ack() will have no effect if 351874aeea5SJeff Kirsher * interrupts have already been disabled. 352874aeea5SJeff Kirsher */ 353f820c0acSBert Kenward if (napi_complete_done(napi, spent)) 354514bedbcSBen Hutchings efx_nic_eventq_read_ack(channel); 355874aeea5SJeff Kirsher } 356874aeea5SJeff Kirsher 357874aeea5SJeff Kirsher return spent; 358874aeea5SJeff Kirsher } 359874aeea5SJeff Kirsher 360874aeea5SJeff Kirsher /* Create event queue 361874aeea5SJeff Kirsher * Event queue memory allocations are done only once. If the channel 362874aeea5SJeff Kirsher * is reset, the memory buffer will be reused; this guards against 363874aeea5SJeff Kirsher * errors during channel reset and also simplifies interrupt handling. 364874aeea5SJeff Kirsher */ 365874aeea5SJeff Kirsher static int efx_probe_eventq(struct efx_channel *channel) 366874aeea5SJeff Kirsher { 367874aeea5SJeff Kirsher struct efx_nic *efx = channel->efx; 368874aeea5SJeff Kirsher unsigned long entries; 369874aeea5SJeff Kirsher 37086ee5302SBen Hutchings netif_dbg(efx, probe, efx->net_dev, 371874aeea5SJeff Kirsher "chan %d create event queue\n", channel->channel); 372874aeea5SJeff Kirsher 373874aeea5SJeff Kirsher /* Build an event queue with room for one event per tx and rx buffer, 374874aeea5SJeff Kirsher * plus some extra for link state events and MCDI completions. */ 375874aeea5SJeff Kirsher entries = roundup_pow_of_two(efx->rxq_entries + efx->txq_entries + 128); 376e01b16a7SEdward Cree EFX_WARN_ON_PARANOID(entries > EFX_MAX_EVQ_SIZE); 377874aeea5SJeff Kirsher channel->eventq_mask = max(entries, EFX_MIN_EVQ_SIZE) - 1; 378874aeea5SJeff Kirsher 379874aeea5SJeff Kirsher return efx_nic_probe_eventq(channel); 380874aeea5SJeff Kirsher } 381874aeea5SJeff Kirsher 382874aeea5SJeff Kirsher /* Prepare channel's event queue */ 383261e4d96SJon Cooper static int efx_init_eventq(struct efx_channel *channel) 384874aeea5SJeff Kirsher { 38515acb1ceSBen Hutchings struct efx_nic *efx = channel->efx; 386261e4d96SJon Cooper int rc; 387261e4d96SJon Cooper 388261e4d96SJon Cooper EFX_WARN_ON_PARANOID(channel->eventq_init); 389261e4d96SJon Cooper 39015acb1ceSBen Hutchings netif_dbg(efx, drv, efx->net_dev, 391874aeea5SJeff Kirsher "chan %d init event queue\n", channel->channel); 392874aeea5SJeff Kirsher 393261e4d96SJon Cooper rc = efx_nic_init_eventq(channel); 394261e4d96SJon Cooper if (rc == 0) { 39515acb1ceSBen Hutchings efx->type->push_irq_moderation(channel); 396874aeea5SJeff Kirsher channel->eventq_read_ptr = 0; 397be3fc09cSBen Hutchings channel->eventq_init = true; 398874aeea5SJeff Kirsher } 399261e4d96SJon Cooper return rc; 400261e4d96SJon Cooper } 401874aeea5SJeff Kirsher 4029f2cb71cSBen Hutchings /* Enable event queue processing and NAPI */ 40336763266SAlexandre Rames void efx_start_eventq(struct efx_channel *channel) 4049f2cb71cSBen Hutchings { 4059f2cb71cSBen Hutchings netif_dbg(channel->efx, ifup, channel->efx->net_dev, 4069f2cb71cSBen Hutchings "chan %d start event queue\n", channel->channel); 4079f2cb71cSBen Hutchings 408514bedbcSBen Hutchings /* Make sure the NAPI handler sees the enabled flag set */ 4099f2cb71cSBen Hutchings channel->enabled = true; 4109f2cb71cSBen Hutchings smp_wmb(); 4119f2cb71cSBen Hutchings 4129f2cb71cSBen Hutchings napi_enable(&channel->napi_str); 4139f2cb71cSBen Hutchings efx_nic_eventq_read_ack(channel); 4149f2cb71cSBen Hutchings } 4159f2cb71cSBen Hutchings 4169f2cb71cSBen Hutchings /* Disable event queue processing and NAPI */ 41736763266SAlexandre Rames void efx_stop_eventq(struct efx_channel *channel) 4189f2cb71cSBen Hutchings { 4199f2cb71cSBen Hutchings if (!channel->enabled) 4209f2cb71cSBen Hutchings return; 4219f2cb71cSBen Hutchings 4229f2cb71cSBen Hutchings napi_disable(&channel->napi_str); 4239f2cb71cSBen Hutchings channel->enabled = false; 4249f2cb71cSBen Hutchings } 4259f2cb71cSBen Hutchings 426874aeea5SJeff Kirsher static void efx_fini_eventq(struct efx_channel *channel) 427874aeea5SJeff Kirsher { 428be3fc09cSBen Hutchings if (!channel->eventq_init) 429be3fc09cSBen Hutchings return; 430be3fc09cSBen Hutchings 431874aeea5SJeff Kirsher netif_dbg(channel->efx, drv, channel->efx->net_dev, 432874aeea5SJeff Kirsher "chan %d fini event queue\n", channel->channel); 433874aeea5SJeff Kirsher 434874aeea5SJeff Kirsher efx_nic_fini_eventq(channel); 435be3fc09cSBen Hutchings channel->eventq_init = false; 436874aeea5SJeff Kirsher } 437874aeea5SJeff Kirsher 438874aeea5SJeff Kirsher static void efx_remove_eventq(struct efx_channel *channel) 439874aeea5SJeff Kirsher { 440874aeea5SJeff Kirsher netif_dbg(channel->efx, drv, channel->efx->net_dev, 441874aeea5SJeff Kirsher "chan %d remove event queue\n", channel->channel); 442874aeea5SJeff Kirsher 443874aeea5SJeff Kirsher efx_nic_remove_eventq(channel); 444874aeea5SJeff Kirsher } 445874aeea5SJeff Kirsher 446874aeea5SJeff Kirsher /************************************************************************** 447874aeea5SJeff Kirsher * 448874aeea5SJeff Kirsher * Channel handling 449874aeea5SJeff Kirsher * 450874aeea5SJeff Kirsher *************************************************************************/ 451874aeea5SJeff Kirsher 4527f967c01SBen Hutchings /* Allocate and initialise a channel structure. */ 453874aeea5SJeff Kirsher static struct efx_channel * 454874aeea5SJeff Kirsher efx_alloc_channel(struct efx_nic *efx, int i, struct efx_channel *old_channel) 455874aeea5SJeff Kirsher { 456874aeea5SJeff Kirsher struct efx_channel *channel; 457874aeea5SJeff Kirsher struct efx_rx_queue *rx_queue; 458874aeea5SJeff Kirsher struct efx_tx_queue *tx_queue; 459874aeea5SJeff Kirsher int j; 460874aeea5SJeff Kirsher 4617f967c01SBen Hutchings channel = kzalloc(sizeof(*channel), GFP_KERNEL); 4627f967c01SBen Hutchings if (!channel) 4637f967c01SBen Hutchings return NULL; 4647f967c01SBen Hutchings 4657f967c01SBen Hutchings channel->efx = efx; 4667f967c01SBen Hutchings channel->channel = i; 4677f967c01SBen Hutchings channel->type = &efx_default_channel_type; 4687f967c01SBen Hutchings 4697f967c01SBen Hutchings for (j = 0; j < EFX_TXQ_TYPES; j++) { 4707f967c01SBen Hutchings tx_queue = &channel->tx_queue[j]; 4717f967c01SBen Hutchings tx_queue->efx = efx; 4727f967c01SBen Hutchings tx_queue->queue = i * EFX_TXQ_TYPES + j; 4737f967c01SBen Hutchings tx_queue->channel = channel; 4747f967c01SBen Hutchings } 4757f967c01SBen Hutchings 4763af0f342SEdward Cree #ifdef CONFIG_RFS_ACCEL 4773af0f342SEdward Cree INIT_WORK(&channel->filter_work, efx_filter_rfs_expire); 4783af0f342SEdward Cree #endif 4793af0f342SEdward Cree 4807f967c01SBen Hutchings rx_queue = &channel->rx_queue; 4817f967c01SBen Hutchings rx_queue->efx = efx; 4827aa1402eSKees Cook timer_setup(&rx_queue->slow_fill, efx_rx_slow_fill, 0); 4837f967c01SBen Hutchings 4847f967c01SBen Hutchings return channel; 4857f967c01SBen Hutchings } 4867f967c01SBen Hutchings 4877f967c01SBen Hutchings /* Allocate and initialise a channel structure, copying parameters 4887f967c01SBen Hutchings * (but not resources) from an old channel structure. 4897f967c01SBen Hutchings */ 4907f967c01SBen Hutchings static struct efx_channel * 4917f967c01SBen Hutchings efx_copy_channel(const struct efx_channel *old_channel) 4927f967c01SBen Hutchings { 4937f967c01SBen Hutchings struct efx_channel *channel; 4947f967c01SBen Hutchings struct efx_rx_queue *rx_queue; 4957f967c01SBen Hutchings struct efx_tx_queue *tx_queue; 4967f967c01SBen Hutchings int j; 4977f967c01SBen Hutchings 498874aeea5SJeff Kirsher channel = kmalloc(sizeof(*channel), GFP_KERNEL); 499874aeea5SJeff Kirsher if (!channel) 500874aeea5SJeff Kirsher return NULL; 501874aeea5SJeff Kirsher 502874aeea5SJeff Kirsher *channel = *old_channel; 503874aeea5SJeff Kirsher 504874aeea5SJeff Kirsher channel->napi_dev = NULL; 50546d054f8SBert Kenward INIT_HLIST_NODE(&channel->napi_str.napi_hash_node); 50646d054f8SBert Kenward channel->napi_str.napi_id = 0; 50746d054f8SBert Kenward channel->napi_str.state = 0; 508874aeea5SJeff Kirsher memset(&channel->eventq, 0, sizeof(channel->eventq)); 509874aeea5SJeff Kirsher 510874aeea5SJeff Kirsher for (j = 0; j < EFX_TXQ_TYPES; j++) { 511874aeea5SJeff Kirsher tx_queue = &channel->tx_queue[j]; 512874aeea5SJeff Kirsher if (tx_queue->channel) 513874aeea5SJeff Kirsher tx_queue->channel = channel; 514874aeea5SJeff Kirsher tx_queue->buffer = NULL; 515874aeea5SJeff Kirsher memset(&tx_queue->txd, 0, sizeof(tx_queue->txd)); 516874aeea5SJeff Kirsher } 517874aeea5SJeff Kirsher 518874aeea5SJeff Kirsher rx_queue = &channel->rx_queue; 5197f967c01SBen Hutchings rx_queue->buffer = NULL; 5207f967c01SBen Hutchings memset(&rx_queue->rxd, 0, sizeof(rx_queue->rxd)); 5217aa1402eSKees Cook timer_setup(&rx_queue->slow_fill, efx_rx_slow_fill, 0); 5223af0f342SEdward Cree #ifdef CONFIG_RFS_ACCEL 5233af0f342SEdward Cree INIT_WORK(&channel->filter_work, efx_filter_rfs_expire); 5243af0f342SEdward Cree #endif 525874aeea5SJeff Kirsher 526874aeea5SJeff Kirsher return channel; 527874aeea5SJeff Kirsher } 528874aeea5SJeff Kirsher 529874aeea5SJeff Kirsher static int efx_probe_channel(struct efx_channel *channel) 530874aeea5SJeff Kirsher { 531874aeea5SJeff Kirsher struct efx_tx_queue *tx_queue; 532874aeea5SJeff Kirsher struct efx_rx_queue *rx_queue; 533874aeea5SJeff Kirsher int rc; 534874aeea5SJeff Kirsher 535874aeea5SJeff Kirsher netif_dbg(channel->efx, probe, channel->efx->net_dev, 536874aeea5SJeff Kirsher "creating channel %d\n", channel->channel); 537874aeea5SJeff Kirsher 5387f967c01SBen Hutchings rc = channel->type->pre_probe(channel); 5397f967c01SBen Hutchings if (rc) 5407f967c01SBen Hutchings goto fail; 5417f967c01SBen Hutchings 542874aeea5SJeff Kirsher rc = efx_probe_eventq(channel); 543874aeea5SJeff Kirsher if (rc) 5447f967c01SBen Hutchings goto fail; 545874aeea5SJeff Kirsher 546874aeea5SJeff Kirsher efx_for_each_channel_tx_queue(tx_queue, channel) { 547874aeea5SJeff Kirsher rc = efx_probe_tx_queue(tx_queue); 548874aeea5SJeff Kirsher if (rc) 5497f967c01SBen Hutchings goto fail; 550874aeea5SJeff Kirsher } 551874aeea5SJeff Kirsher 552874aeea5SJeff Kirsher efx_for_each_channel_rx_queue(rx_queue, channel) { 553874aeea5SJeff Kirsher rc = efx_probe_rx_queue(rx_queue); 554874aeea5SJeff Kirsher if (rc) 5557f967c01SBen Hutchings goto fail; 556874aeea5SJeff Kirsher } 557874aeea5SJeff Kirsher 558874aeea5SJeff Kirsher return 0; 559874aeea5SJeff Kirsher 5607f967c01SBen Hutchings fail: 5617f967c01SBen Hutchings efx_remove_channel(channel); 562874aeea5SJeff Kirsher return rc; 563874aeea5SJeff Kirsher } 564874aeea5SJeff Kirsher 5657f967c01SBen Hutchings static void 5667f967c01SBen Hutchings efx_get_channel_name(struct efx_channel *channel, char *buf, size_t len) 5677f967c01SBen Hutchings { 5687f967c01SBen Hutchings struct efx_nic *efx = channel->efx; 5697f967c01SBen Hutchings const char *type; 5707f967c01SBen Hutchings int number; 5717f967c01SBen Hutchings 5727f967c01SBen Hutchings number = channel->channel; 5737f967c01SBen Hutchings if (efx->tx_channel_offset == 0) { 5747f967c01SBen Hutchings type = ""; 5757f967c01SBen Hutchings } else if (channel->channel < efx->tx_channel_offset) { 5767f967c01SBen Hutchings type = "-rx"; 5777f967c01SBen Hutchings } else { 5787f967c01SBen Hutchings type = "-tx"; 5797f967c01SBen Hutchings number -= efx->tx_channel_offset; 5807f967c01SBen Hutchings } 5817f967c01SBen Hutchings snprintf(buf, len, "%s%s-%d", efx->name, type, number); 5827f967c01SBen Hutchings } 583874aeea5SJeff Kirsher 584874aeea5SJeff Kirsher static void efx_set_channel_names(struct efx_nic *efx) 585874aeea5SJeff Kirsher { 586874aeea5SJeff Kirsher struct efx_channel *channel; 587874aeea5SJeff Kirsher 5887f967c01SBen Hutchings efx_for_each_channel(channel, efx) 5897f967c01SBen Hutchings channel->type->get_name(channel, 590d8291187SBen Hutchings efx->msi_context[channel->channel].name, 591d8291187SBen Hutchings sizeof(efx->msi_context[0].name)); 592874aeea5SJeff Kirsher } 593874aeea5SJeff Kirsher 594874aeea5SJeff Kirsher static int efx_probe_channels(struct efx_nic *efx) 595874aeea5SJeff Kirsher { 596874aeea5SJeff Kirsher struct efx_channel *channel; 597874aeea5SJeff Kirsher int rc; 598874aeea5SJeff Kirsher 599874aeea5SJeff Kirsher /* Restart special buffer allocation */ 600874aeea5SJeff Kirsher efx->next_buffer_table = 0; 601874aeea5SJeff Kirsher 602c92aaff1SBen Hutchings /* Probe channels in reverse, so that any 'extra' channels 603c92aaff1SBen Hutchings * use the start of the buffer table. This allows the traffic 604c92aaff1SBen Hutchings * channels to be resized without moving them or wasting the 605c92aaff1SBen Hutchings * entries before them. 606c92aaff1SBen Hutchings */ 607c92aaff1SBen Hutchings efx_for_each_channel_rev(channel, efx) { 608874aeea5SJeff Kirsher rc = efx_probe_channel(channel); 609874aeea5SJeff Kirsher if (rc) { 610874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 611874aeea5SJeff Kirsher "failed to create channel %d\n", 612874aeea5SJeff Kirsher channel->channel); 613874aeea5SJeff Kirsher goto fail; 614874aeea5SJeff Kirsher } 615874aeea5SJeff Kirsher } 616874aeea5SJeff Kirsher efx_set_channel_names(efx); 617874aeea5SJeff Kirsher 618874aeea5SJeff Kirsher return 0; 619874aeea5SJeff Kirsher 620874aeea5SJeff Kirsher fail: 621874aeea5SJeff Kirsher efx_remove_channels(efx); 622874aeea5SJeff Kirsher return rc; 623874aeea5SJeff Kirsher } 624874aeea5SJeff Kirsher 625874aeea5SJeff Kirsher /* Channels are shutdown and reinitialised whilst the NIC is running 626874aeea5SJeff Kirsher * to propagate configuration changes (mtu, checksum offload), or 627874aeea5SJeff Kirsher * to clear hardware error conditions 628874aeea5SJeff Kirsher */ 6299f2cb71cSBen Hutchings static void efx_start_datapath(struct efx_nic *efx) 630874aeea5SJeff Kirsher { 631ebfcd0fdSAndrew Rybchenko netdev_features_t old_features = efx->net_dev->features; 63285740cdfSBen Hutchings bool old_rx_scatter = efx->rx_scatter; 633874aeea5SJeff Kirsher struct efx_tx_queue *tx_queue; 634874aeea5SJeff Kirsher struct efx_rx_queue *rx_queue; 635874aeea5SJeff Kirsher struct efx_channel *channel; 63685740cdfSBen Hutchings size_t rx_buf_len; 637874aeea5SJeff Kirsher 638874aeea5SJeff Kirsher /* Calculate the rx buffer allocation parameters required to 639874aeea5SJeff Kirsher * support the current MTU, including padding for header 640874aeea5SJeff Kirsher * alignment and overruns. 641874aeea5SJeff Kirsher */ 64243a3739dSJon Cooper efx->rx_dma_len = (efx->rx_prefix_size + 643874aeea5SJeff Kirsher EFX_MAX_FRAME_LEN(efx->net_dev->mtu) + 644874aeea5SJeff Kirsher efx->type->rx_buffer_padding); 64585740cdfSBen Hutchings rx_buf_len = (sizeof(struct efx_rx_page_state) + 6462ec03014SAndrew Rybchenko efx->rx_ip_align + efx->rx_dma_len); 64785740cdfSBen Hutchings if (rx_buf_len <= PAGE_SIZE) { 648e8c68c0aSJon Cooper efx->rx_scatter = efx->type->always_rx_scatter; 64985740cdfSBen Hutchings efx->rx_buffer_order = 0; 65085740cdfSBen Hutchings } else if (efx->type->can_rx_scatter) { 651950c54dfSBen Hutchings BUILD_BUG_ON(EFX_RX_USR_BUF_SIZE % L1_CACHE_BYTES); 65285740cdfSBen Hutchings BUILD_BUG_ON(sizeof(struct efx_rx_page_state) + 653950c54dfSBen Hutchings 2 * ALIGN(NET_IP_ALIGN + EFX_RX_USR_BUF_SIZE, 654950c54dfSBen Hutchings EFX_RX_BUF_ALIGNMENT) > 655950c54dfSBen Hutchings PAGE_SIZE); 65685740cdfSBen Hutchings efx->rx_scatter = true; 65785740cdfSBen Hutchings efx->rx_dma_len = EFX_RX_USR_BUF_SIZE; 65885740cdfSBen Hutchings efx->rx_buffer_order = 0; 65985740cdfSBen Hutchings } else { 66085740cdfSBen Hutchings efx->rx_scatter = false; 66185740cdfSBen Hutchings efx->rx_buffer_order = get_order(rx_buf_len); 66285740cdfSBen Hutchings } 66385740cdfSBen Hutchings 6641648a23fSDaniel Pieczko efx_rx_config_page_split(efx); 6651648a23fSDaniel Pieczko if (efx->rx_buffer_order) 6661648a23fSDaniel Pieczko netif_dbg(efx, drv, efx->net_dev, 6671648a23fSDaniel Pieczko "RX buf len=%u; page order=%u batch=%u\n", 6681648a23fSDaniel Pieczko efx->rx_dma_len, efx->rx_buffer_order, 6691648a23fSDaniel Pieczko efx->rx_pages_per_batch); 6701648a23fSDaniel Pieczko else 6711648a23fSDaniel Pieczko netif_dbg(efx, drv, efx->net_dev, 6721648a23fSDaniel Pieczko "RX buf len=%u step=%u bpp=%u; page batch=%u\n", 6731648a23fSDaniel Pieczko efx->rx_dma_len, efx->rx_page_buf_step, 6741648a23fSDaniel Pieczko efx->rx_bufs_per_page, efx->rx_pages_per_batch); 6752768935aSDaniel Pieczko 676ebfcd0fdSAndrew Rybchenko /* Restore previously fixed features in hw_features and remove 677ebfcd0fdSAndrew Rybchenko * features which are fixed now 678ebfcd0fdSAndrew Rybchenko */ 679ebfcd0fdSAndrew Rybchenko efx->net_dev->hw_features |= efx->net_dev->features; 680ebfcd0fdSAndrew Rybchenko efx->net_dev->hw_features &= ~efx->fixed_features; 681ebfcd0fdSAndrew Rybchenko efx->net_dev->features |= efx->fixed_features; 682ebfcd0fdSAndrew Rybchenko if (efx->net_dev->features != old_features) 683ebfcd0fdSAndrew Rybchenko netdev_features_change(efx->net_dev); 684ebfcd0fdSAndrew Rybchenko 685e8c68c0aSJon Cooper /* RX filters may also have scatter-enabled flags */ 68685740cdfSBen Hutchings if (efx->rx_scatter != old_rx_scatter) 687add72477SBen Hutchings efx->type->filter_update_rx_scatter(efx); 688874aeea5SJeff Kirsher 68914bf718fSBen Hutchings /* We must keep at least one descriptor in a TX ring empty. 69014bf718fSBen Hutchings * We could avoid this when the queue size does not exactly 69114bf718fSBen Hutchings * match the hardware ring size, but it's not that important. 69214bf718fSBen Hutchings * Therefore we stop the queue when one more skb might fill 69314bf718fSBen Hutchings * the ring completely. We wake it when half way back to 69414bf718fSBen Hutchings * empty. 69514bf718fSBen Hutchings */ 69614bf718fSBen Hutchings efx->txq_stop_thresh = efx->txq_entries - efx_tx_max_skb_descs(efx); 69714bf718fSBen Hutchings efx->txq_wake_thresh = efx->txq_stop_thresh / 2; 69814bf718fSBen Hutchings 699874aeea5SJeff Kirsher /* Initialise the channels */ 700874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) { 7013881d8abSAlexandre Rames efx_for_each_channel_tx_queue(tx_queue, channel) { 702874aeea5SJeff Kirsher efx_init_tx_queue(tx_queue); 7033881d8abSAlexandre Rames atomic_inc(&efx->active_queues); 7043881d8abSAlexandre Rames } 705874aeea5SJeff Kirsher 7069f2cb71cSBen Hutchings efx_for_each_channel_rx_queue(rx_queue, channel) { 707874aeea5SJeff Kirsher efx_init_rx_queue(rx_queue); 7083881d8abSAlexandre Rames atomic_inc(&efx->active_queues); 709cce28794SJon Cooper efx_stop_eventq(channel); 710cce28794SJon Cooper efx_fast_push_rx_descriptors(rx_queue, false); 711cce28794SJon Cooper efx_start_eventq(channel); 7129f2cb71cSBen Hutchings } 713874aeea5SJeff Kirsher 71485740cdfSBen Hutchings WARN_ON(channel->rx_pkt_n_frags); 715874aeea5SJeff Kirsher } 7169f2cb71cSBen Hutchings 7172ea4dc28SAlexandre Rames efx_ptp_start_datapath(efx); 7182ea4dc28SAlexandre Rames 7199f2cb71cSBen Hutchings if (netif_device_present(efx->net_dev)) 7209f2cb71cSBen Hutchings netif_tx_wake_all_queues(efx->net_dev); 721874aeea5SJeff Kirsher } 722874aeea5SJeff Kirsher 7239f2cb71cSBen Hutchings static void efx_stop_datapath(struct efx_nic *efx) 724874aeea5SJeff Kirsher { 725874aeea5SJeff Kirsher struct efx_channel *channel; 726874aeea5SJeff Kirsher struct efx_tx_queue *tx_queue; 727874aeea5SJeff Kirsher struct efx_rx_queue *rx_queue; 728874aeea5SJeff Kirsher int rc; 729874aeea5SJeff Kirsher 730874aeea5SJeff Kirsher EFX_ASSERT_RESET_SERIALISED(efx); 731874aeea5SJeff Kirsher BUG_ON(efx->port_enabled); 732874aeea5SJeff Kirsher 7332ea4dc28SAlexandre Rames efx_ptp_stop_datapath(efx); 7342ea4dc28SAlexandre Rames 735d8aec745SBen Hutchings /* Stop RX refill */ 736d8aec745SBen Hutchings efx_for_each_channel(channel, efx) { 737d8aec745SBen Hutchings efx_for_each_channel_rx_queue(rx_queue, channel) 738d8aec745SBen Hutchings rx_queue->refill_enabled = false; 739d8aec745SBen Hutchings } 740d8aec745SBen Hutchings 741874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) { 7429f2cb71cSBen Hutchings /* RX packet processing is pipelined, so wait for the 7439f2cb71cSBen Hutchings * NAPI handler to complete. At least event queue 0 7449f2cb71cSBen Hutchings * might be kept active by non-data events, so don't 7459f2cb71cSBen Hutchings * use napi_synchronize() but actually disable NAPI 7469f2cb71cSBen Hutchings * temporarily. 7479f2cb71cSBen Hutchings */ 7489f2cb71cSBen Hutchings if (efx_channel_has_rx_queue(channel)) { 7499f2cb71cSBen Hutchings efx_stop_eventq(channel); 7509f2cb71cSBen Hutchings efx_start_eventq(channel); 7519f2cb71cSBen Hutchings } 752e42c3d85SBen Hutchings } 753874aeea5SJeff Kirsher 754e42c3d85SBen Hutchings rc = efx->type->fini_dmaq(efx); 7555a6681e2SEdward Cree if (rc) { 756e42c3d85SBen Hutchings netif_err(efx, drv, efx->net_dev, "failed to flush queues\n"); 757e42c3d85SBen Hutchings } else { 758e42c3d85SBen Hutchings netif_dbg(efx, drv, efx->net_dev, 759e42c3d85SBen Hutchings "successfully flushed all queues\n"); 760e42c3d85SBen Hutchings } 761e42c3d85SBen Hutchings 762e42c3d85SBen Hutchings efx_for_each_channel(channel, efx) { 763874aeea5SJeff Kirsher efx_for_each_channel_rx_queue(rx_queue, channel) 764874aeea5SJeff Kirsher efx_fini_rx_queue(rx_queue); 765874aeea5SJeff Kirsher efx_for_each_possible_channel_tx_queue(tx_queue, channel) 766874aeea5SJeff Kirsher efx_fini_tx_queue(tx_queue); 767874aeea5SJeff Kirsher } 768874aeea5SJeff Kirsher } 769874aeea5SJeff Kirsher 770874aeea5SJeff Kirsher static void efx_remove_channel(struct efx_channel *channel) 771874aeea5SJeff Kirsher { 772874aeea5SJeff Kirsher struct efx_tx_queue *tx_queue; 773874aeea5SJeff Kirsher struct efx_rx_queue *rx_queue; 774874aeea5SJeff Kirsher 775874aeea5SJeff Kirsher netif_dbg(channel->efx, drv, channel->efx->net_dev, 776874aeea5SJeff Kirsher "destroy chan %d\n", channel->channel); 777874aeea5SJeff Kirsher 778874aeea5SJeff Kirsher efx_for_each_channel_rx_queue(rx_queue, channel) 779874aeea5SJeff Kirsher efx_remove_rx_queue(rx_queue); 780874aeea5SJeff Kirsher efx_for_each_possible_channel_tx_queue(tx_queue, channel) 781874aeea5SJeff Kirsher efx_remove_tx_queue(tx_queue); 782874aeea5SJeff Kirsher efx_remove_eventq(channel); 783c31e5f9fSStuart Hodgson channel->type->post_remove(channel); 784874aeea5SJeff Kirsher } 785874aeea5SJeff Kirsher 786874aeea5SJeff Kirsher static void efx_remove_channels(struct efx_nic *efx) 787874aeea5SJeff Kirsher { 788874aeea5SJeff Kirsher struct efx_channel *channel; 789874aeea5SJeff Kirsher 790874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) 791874aeea5SJeff Kirsher efx_remove_channel(channel); 792874aeea5SJeff Kirsher } 793874aeea5SJeff Kirsher 794874aeea5SJeff Kirsher int 795874aeea5SJeff Kirsher efx_realloc_channels(struct efx_nic *efx, u32 rxq_entries, u32 txq_entries) 796874aeea5SJeff Kirsher { 797874aeea5SJeff Kirsher struct efx_channel *other_channel[EFX_MAX_CHANNELS], *channel; 798874aeea5SJeff Kirsher u32 old_rxq_entries, old_txq_entries; 7997f967c01SBen Hutchings unsigned i, next_buffer_table = 0; 800261e4d96SJon Cooper int rc, rc2; 8018b7325b4SBen Hutchings 8028b7325b4SBen Hutchings rc = efx_check_disabled(efx); 8038b7325b4SBen Hutchings if (rc) 8048b7325b4SBen Hutchings return rc; 8057f967c01SBen Hutchings 8067f967c01SBen Hutchings /* Not all channels should be reallocated. We must avoid 8077f967c01SBen Hutchings * reallocating their buffer table entries. 8087f967c01SBen Hutchings */ 8097f967c01SBen Hutchings efx_for_each_channel(channel, efx) { 8107f967c01SBen Hutchings struct efx_rx_queue *rx_queue; 8117f967c01SBen Hutchings struct efx_tx_queue *tx_queue; 8127f967c01SBen Hutchings 8137f967c01SBen Hutchings if (channel->type->copy) 8147f967c01SBen Hutchings continue; 8157f967c01SBen Hutchings next_buffer_table = max(next_buffer_table, 8167f967c01SBen Hutchings channel->eventq.index + 8177f967c01SBen Hutchings channel->eventq.entries); 8187f967c01SBen Hutchings efx_for_each_channel_rx_queue(rx_queue, channel) 8197f967c01SBen Hutchings next_buffer_table = max(next_buffer_table, 8207f967c01SBen Hutchings rx_queue->rxd.index + 8217f967c01SBen Hutchings rx_queue->rxd.entries); 8227f967c01SBen Hutchings efx_for_each_channel_tx_queue(tx_queue, channel) 8237f967c01SBen Hutchings next_buffer_table = max(next_buffer_table, 8247f967c01SBen Hutchings tx_queue->txd.index + 8257f967c01SBen Hutchings tx_queue->txd.entries); 8267f967c01SBen Hutchings } 827874aeea5SJeff Kirsher 82829c69a48SBen Hutchings efx_device_detach_sync(efx); 829874aeea5SJeff Kirsher efx_stop_all(efx); 830d8291187SBen Hutchings efx_soft_disable_interrupts(efx); 831874aeea5SJeff Kirsher 8327f967c01SBen Hutchings /* Clone channels (where possible) */ 833874aeea5SJeff Kirsher memset(other_channel, 0, sizeof(other_channel)); 834874aeea5SJeff Kirsher for (i = 0; i < efx->n_channels; i++) { 8357f967c01SBen Hutchings channel = efx->channel[i]; 8367f967c01SBen Hutchings if (channel->type->copy) 8377f967c01SBen Hutchings channel = channel->type->copy(channel); 838874aeea5SJeff Kirsher if (!channel) { 839874aeea5SJeff Kirsher rc = -ENOMEM; 840874aeea5SJeff Kirsher goto out; 841874aeea5SJeff Kirsher } 842874aeea5SJeff Kirsher other_channel[i] = channel; 843874aeea5SJeff Kirsher } 844874aeea5SJeff Kirsher 845874aeea5SJeff Kirsher /* Swap entry counts and channel pointers */ 846874aeea5SJeff Kirsher old_rxq_entries = efx->rxq_entries; 847874aeea5SJeff Kirsher old_txq_entries = efx->txq_entries; 848874aeea5SJeff Kirsher efx->rxq_entries = rxq_entries; 849874aeea5SJeff Kirsher efx->txq_entries = txq_entries; 850874aeea5SJeff Kirsher for (i = 0; i < efx->n_channels; i++) { 851874aeea5SJeff Kirsher channel = efx->channel[i]; 852874aeea5SJeff Kirsher efx->channel[i] = other_channel[i]; 853874aeea5SJeff Kirsher other_channel[i] = channel; 854874aeea5SJeff Kirsher } 855874aeea5SJeff Kirsher 8567f967c01SBen Hutchings /* Restart buffer table allocation */ 8577f967c01SBen Hutchings efx->next_buffer_table = next_buffer_table; 8587f967c01SBen Hutchings 8597f967c01SBen Hutchings for (i = 0; i < efx->n_channels; i++) { 8607f967c01SBen Hutchings channel = efx->channel[i]; 8617f967c01SBen Hutchings if (!channel->type->copy) 8627f967c01SBen Hutchings continue; 8637f967c01SBen Hutchings rc = efx_probe_channel(channel); 864874aeea5SJeff Kirsher if (rc) 865874aeea5SJeff Kirsher goto rollback; 8667f967c01SBen Hutchings efx_init_napi_channel(efx->channel[i]); 867874aeea5SJeff Kirsher } 868874aeea5SJeff Kirsher 8697f967c01SBen Hutchings out: 8707f967c01SBen Hutchings /* Destroy unused channel structures */ 8717f967c01SBen Hutchings for (i = 0; i < efx->n_channels; i++) { 8727f967c01SBen Hutchings channel = other_channel[i]; 8737f967c01SBen Hutchings if (channel && channel->type->copy) { 8747f967c01SBen Hutchings efx_fini_napi_channel(channel); 8757f967c01SBen Hutchings efx_remove_channel(channel); 8767f967c01SBen Hutchings kfree(channel); 8777f967c01SBen Hutchings } 8787f967c01SBen Hutchings } 8797f967c01SBen Hutchings 880261e4d96SJon Cooper rc2 = efx_soft_enable_interrupts(efx); 881261e4d96SJon Cooper if (rc2) { 882261e4d96SJon Cooper rc = rc ? rc : rc2; 883261e4d96SJon Cooper netif_err(efx, drv, efx->net_dev, 884261e4d96SJon Cooper "unable to restart interrupts on channel reallocation\n"); 885261e4d96SJon Cooper efx_schedule_reset(efx, RESET_TYPE_DISABLE); 886261e4d96SJon Cooper } else { 887874aeea5SJeff Kirsher efx_start_all(efx); 8889c568fd8SPeter Dunning efx_device_attach_if_not_resetting(efx); 889261e4d96SJon Cooper } 890874aeea5SJeff Kirsher return rc; 891874aeea5SJeff Kirsher 892874aeea5SJeff Kirsher rollback: 893874aeea5SJeff Kirsher /* Swap back */ 894874aeea5SJeff Kirsher efx->rxq_entries = old_rxq_entries; 895874aeea5SJeff Kirsher efx->txq_entries = old_txq_entries; 896874aeea5SJeff Kirsher for (i = 0; i < efx->n_channels; i++) { 897874aeea5SJeff Kirsher channel = efx->channel[i]; 898874aeea5SJeff Kirsher efx->channel[i] = other_channel[i]; 899874aeea5SJeff Kirsher other_channel[i] = channel; 900874aeea5SJeff Kirsher } 901874aeea5SJeff Kirsher goto out; 902874aeea5SJeff Kirsher } 903874aeea5SJeff Kirsher 904874aeea5SJeff Kirsher void efx_schedule_slow_fill(struct efx_rx_queue *rx_queue) 905874aeea5SJeff Kirsher { 906874aeea5SJeff Kirsher mod_timer(&rx_queue->slow_fill, jiffies + msecs_to_jiffies(100)); 907874aeea5SJeff Kirsher } 908874aeea5SJeff Kirsher 909e7345ba3Skbuild test robot static bool efx_default_channel_want_txqs(struct efx_channel *channel) 9102935e3c3SEdward Cree { 9112935e3c3SEdward Cree return channel->channel - channel->efx->tx_channel_offset < 9122935e3c3SEdward Cree channel->efx->n_tx_channels; 9132935e3c3SEdward Cree } 9142935e3c3SEdward Cree 9157f967c01SBen Hutchings static const struct efx_channel_type efx_default_channel_type = { 9167f967c01SBen Hutchings .pre_probe = efx_channel_dummy_op_int, 917c31e5f9fSStuart Hodgson .post_remove = efx_channel_dummy_op_void, 9187f967c01SBen Hutchings .get_name = efx_get_channel_name, 9197f967c01SBen Hutchings .copy = efx_copy_channel, 9202935e3c3SEdward Cree .want_txqs = efx_default_channel_want_txqs, 9217f967c01SBen Hutchings .keep_eventq = false, 9222935e3c3SEdward Cree .want_pio = true, 9237f967c01SBen Hutchings }; 9247f967c01SBen Hutchings 9257f967c01SBen Hutchings int efx_channel_dummy_op_int(struct efx_channel *channel) 9267f967c01SBen Hutchings { 9277f967c01SBen Hutchings return 0; 9287f967c01SBen Hutchings } 9297f967c01SBen Hutchings 930c31e5f9fSStuart Hodgson void efx_channel_dummy_op_void(struct efx_channel *channel) 931c31e5f9fSStuart Hodgson { 932c31e5f9fSStuart Hodgson } 933c31e5f9fSStuart Hodgson 934874aeea5SJeff Kirsher /************************************************************************** 935874aeea5SJeff Kirsher * 936874aeea5SJeff Kirsher * Port handling 937874aeea5SJeff Kirsher * 938874aeea5SJeff Kirsher **************************************************************************/ 939874aeea5SJeff Kirsher 940874aeea5SJeff Kirsher /* This ensures that the kernel is kept informed (via 941874aeea5SJeff Kirsher * netif_carrier_on/off) of the link status, and also maintains the 942874aeea5SJeff Kirsher * link status's stop on the port's TX queue. 943874aeea5SJeff Kirsher */ 944874aeea5SJeff Kirsher void efx_link_status_changed(struct efx_nic *efx) 945874aeea5SJeff Kirsher { 946874aeea5SJeff Kirsher struct efx_link_state *link_state = &efx->link_state; 947874aeea5SJeff Kirsher 948874aeea5SJeff Kirsher /* SFC Bug 5356: A net_dev notifier is registered, so we must ensure 949874aeea5SJeff Kirsher * that no events are triggered between unregister_netdev() and the 950874aeea5SJeff Kirsher * driver unloading. A more general condition is that NETDEV_CHANGE 951874aeea5SJeff Kirsher * can only be generated between NETDEV_UP and NETDEV_DOWN */ 952874aeea5SJeff Kirsher if (!netif_running(efx->net_dev)) 953874aeea5SJeff Kirsher return; 954874aeea5SJeff Kirsher 955874aeea5SJeff Kirsher if (link_state->up != netif_carrier_ok(efx->net_dev)) { 956874aeea5SJeff Kirsher efx->n_link_state_changes++; 957874aeea5SJeff Kirsher 958874aeea5SJeff Kirsher if (link_state->up) 959874aeea5SJeff Kirsher netif_carrier_on(efx->net_dev); 960874aeea5SJeff Kirsher else 961874aeea5SJeff Kirsher netif_carrier_off(efx->net_dev); 962874aeea5SJeff Kirsher } 963874aeea5SJeff Kirsher 964874aeea5SJeff Kirsher /* Status message for kernel log */ 9652aa9ef11SBen Hutchings if (link_state->up) 966874aeea5SJeff Kirsher netif_info(efx, link, efx->net_dev, 967964e6135SBen Hutchings "link up at %uMbps %s-duplex (MTU %d)\n", 968874aeea5SJeff Kirsher link_state->speed, link_state->fd ? "full" : "half", 969964e6135SBen Hutchings efx->net_dev->mtu); 9702aa9ef11SBen Hutchings else 971874aeea5SJeff Kirsher netif_info(efx, link, efx->net_dev, "link down\n"); 972874aeea5SJeff Kirsher } 973874aeea5SJeff Kirsher 974c2ab85d2SEdward Cree void efx_link_set_advertising(struct efx_nic *efx, 975c2ab85d2SEdward Cree const unsigned long *advertising) 976874aeea5SJeff Kirsher { 977c2ab85d2SEdward Cree memcpy(efx->link_advertising, advertising, 978c2ab85d2SEdward Cree sizeof(__ETHTOOL_DECLARE_LINK_MODE_MASK())); 979c2ab85d2SEdward Cree 980c2ab85d2SEdward Cree efx->link_advertising[0] |= ADVERTISED_Autoneg; 981c2ab85d2SEdward Cree if (advertising[0] & ADVERTISED_Pause) 982874aeea5SJeff Kirsher efx->wanted_fc |= (EFX_FC_TX | EFX_FC_RX); 983874aeea5SJeff Kirsher else 984874aeea5SJeff Kirsher efx->wanted_fc &= ~(EFX_FC_TX | EFX_FC_RX); 985c2ab85d2SEdward Cree if (advertising[0] & ADVERTISED_Asym_Pause) 986874aeea5SJeff Kirsher efx->wanted_fc ^= EFX_FC_TX; 987874aeea5SJeff Kirsher } 988c2ab85d2SEdward Cree 989c2ab85d2SEdward Cree /* Equivalent to efx_link_set_advertising with all-zeroes, except does not 990c2ab85d2SEdward Cree * force the Autoneg bit on. 991c2ab85d2SEdward Cree */ 992c2ab85d2SEdward Cree void efx_link_clear_advertising(struct efx_nic *efx) 993c2ab85d2SEdward Cree { 994c2ab85d2SEdward Cree bitmap_zero(efx->link_advertising, __ETHTOOL_LINK_MODE_MASK_NBITS); 995c2ab85d2SEdward Cree efx->wanted_fc &= ~(EFX_FC_TX | EFX_FC_RX); 996874aeea5SJeff Kirsher } 997874aeea5SJeff Kirsher 998874aeea5SJeff Kirsher void efx_link_set_wanted_fc(struct efx_nic *efx, u8 wanted_fc) 999874aeea5SJeff Kirsher { 1000874aeea5SJeff Kirsher efx->wanted_fc = wanted_fc; 1001c2ab85d2SEdward Cree if (efx->link_advertising[0]) { 1002874aeea5SJeff Kirsher if (wanted_fc & EFX_FC_RX) 1003c2ab85d2SEdward Cree efx->link_advertising[0] |= (ADVERTISED_Pause | 1004874aeea5SJeff Kirsher ADVERTISED_Asym_Pause); 1005874aeea5SJeff Kirsher else 1006c2ab85d2SEdward Cree efx->link_advertising[0] &= ~(ADVERTISED_Pause | 1007874aeea5SJeff Kirsher ADVERTISED_Asym_Pause); 1008874aeea5SJeff Kirsher if (wanted_fc & EFX_FC_TX) 1009c2ab85d2SEdward Cree efx->link_advertising[0] ^= ADVERTISED_Asym_Pause; 1010874aeea5SJeff Kirsher } 1011874aeea5SJeff Kirsher } 1012874aeea5SJeff Kirsher 1013874aeea5SJeff Kirsher static void efx_fini_port(struct efx_nic *efx); 1014874aeea5SJeff Kirsher 10150d322413SEdward Cree /* We assume that efx->type->reconfigure_mac will always try to sync RX 10160d322413SEdward Cree * filters and therefore needs to read-lock the filter table against freeing 10170d322413SEdward Cree */ 10180d322413SEdward Cree void efx_mac_reconfigure(struct efx_nic *efx) 10190d322413SEdward Cree { 10200d322413SEdward Cree down_read(&efx->filter_sem); 10210d322413SEdward Cree efx->type->reconfigure_mac(efx); 10220d322413SEdward Cree up_read(&efx->filter_sem); 10230d322413SEdward Cree } 10240d322413SEdward Cree 1025874aeea5SJeff Kirsher /* Push loopback/power/transmit disable settings to the PHY, and reconfigure 1026874aeea5SJeff Kirsher * the MAC appropriately. All other PHY configuration changes are pushed 1027874aeea5SJeff Kirsher * through phy_op->set_settings(), and pushed asynchronously to the MAC 1028874aeea5SJeff Kirsher * through efx_monitor(). 1029874aeea5SJeff Kirsher * 1030874aeea5SJeff Kirsher * Callers must hold the mac_lock 1031874aeea5SJeff Kirsher */ 1032874aeea5SJeff Kirsher int __efx_reconfigure_port(struct efx_nic *efx) 1033874aeea5SJeff Kirsher { 1034874aeea5SJeff Kirsher enum efx_phy_mode phy_mode; 1035874aeea5SJeff Kirsher int rc; 1036874aeea5SJeff Kirsher 1037874aeea5SJeff Kirsher WARN_ON(!mutex_is_locked(&efx->mac_lock)); 1038874aeea5SJeff Kirsher 1039874aeea5SJeff Kirsher /* Disable PHY transmit in mac level loopbacks */ 1040874aeea5SJeff Kirsher phy_mode = efx->phy_mode; 1041874aeea5SJeff Kirsher if (LOOPBACK_INTERNAL(efx)) 1042874aeea5SJeff Kirsher efx->phy_mode |= PHY_MODE_TX_DISABLED; 1043874aeea5SJeff Kirsher else 1044874aeea5SJeff Kirsher efx->phy_mode &= ~PHY_MODE_TX_DISABLED; 1045874aeea5SJeff Kirsher 1046874aeea5SJeff Kirsher rc = efx->type->reconfigure_port(efx); 1047874aeea5SJeff Kirsher 1048874aeea5SJeff Kirsher if (rc) 1049874aeea5SJeff Kirsher efx->phy_mode = phy_mode; 1050874aeea5SJeff Kirsher 1051874aeea5SJeff Kirsher return rc; 1052874aeea5SJeff Kirsher } 1053874aeea5SJeff Kirsher 1054874aeea5SJeff Kirsher /* Reinitialise the MAC to pick up new PHY settings, even if the port is 1055874aeea5SJeff Kirsher * disabled. */ 1056874aeea5SJeff Kirsher int efx_reconfigure_port(struct efx_nic *efx) 1057874aeea5SJeff Kirsher { 1058874aeea5SJeff Kirsher int rc; 1059874aeea5SJeff Kirsher 1060874aeea5SJeff Kirsher EFX_ASSERT_RESET_SERIALISED(efx); 1061874aeea5SJeff Kirsher 1062874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 1063874aeea5SJeff Kirsher rc = __efx_reconfigure_port(efx); 1064874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 1065874aeea5SJeff Kirsher 1066874aeea5SJeff Kirsher return rc; 1067874aeea5SJeff Kirsher } 1068874aeea5SJeff Kirsher 1069874aeea5SJeff Kirsher /* Asynchronous work item for changing MAC promiscuity and multicast 1070874aeea5SJeff Kirsher * hash. Avoid a drain/rx_ingress enable by reconfiguring the current 1071874aeea5SJeff Kirsher * MAC directly. */ 1072874aeea5SJeff Kirsher static void efx_mac_work(struct work_struct *data) 1073874aeea5SJeff Kirsher { 1074874aeea5SJeff Kirsher struct efx_nic *efx = container_of(data, struct efx_nic, mac_work); 1075874aeea5SJeff Kirsher 1076874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 107730b81cdaSBen Hutchings if (efx->port_enabled) 10780d322413SEdward Cree efx_mac_reconfigure(efx); 1079874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 1080874aeea5SJeff Kirsher } 1081874aeea5SJeff Kirsher 1082874aeea5SJeff Kirsher static int efx_probe_port(struct efx_nic *efx) 1083874aeea5SJeff Kirsher { 1084874aeea5SJeff Kirsher int rc; 1085874aeea5SJeff Kirsher 1086874aeea5SJeff Kirsher netif_dbg(efx, probe, efx->net_dev, "create port\n"); 1087874aeea5SJeff Kirsher 1088874aeea5SJeff Kirsher if (phy_flash_cfg) 1089874aeea5SJeff Kirsher efx->phy_mode = PHY_MODE_SPECIAL; 1090874aeea5SJeff Kirsher 1091874aeea5SJeff Kirsher /* Connect up MAC/PHY operations table */ 1092874aeea5SJeff Kirsher rc = efx->type->probe_port(efx); 1093874aeea5SJeff Kirsher if (rc) 1094874aeea5SJeff Kirsher return rc; 1095874aeea5SJeff Kirsher 1096e332bcb3SBen Hutchings /* Initialise MAC address to permanent address */ 1097cd84ff4dSEdward Cree ether_addr_copy(efx->net_dev->dev_addr, efx->net_dev->perm_addr); 1098874aeea5SJeff Kirsher 1099874aeea5SJeff Kirsher return 0; 1100874aeea5SJeff Kirsher } 1101874aeea5SJeff Kirsher 1102874aeea5SJeff Kirsher static int efx_init_port(struct efx_nic *efx) 1103874aeea5SJeff Kirsher { 1104874aeea5SJeff Kirsher int rc; 1105874aeea5SJeff Kirsher 1106874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "init port\n"); 1107874aeea5SJeff Kirsher 1108874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 1109874aeea5SJeff Kirsher 1110874aeea5SJeff Kirsher rc = efx->phy_op->init(efx); 1111874aeea5SJeff Kirsher if (rc) 1112874aeea5SJeff Kirsher goto fail1; 1113874aeea5SJeff Kirsher 1114874aeea5SJeff Kirsher efx->port_initialized = true; 1115874aeea5SJeff Kirsher 1116874aeea5SJeff Kirsher /* Reconfigure the MAC before creating dma queues (required for 1117874aeea5SJeff Kirsher * Falcon/A1 where RX_INGR_EN/TX_DRAIN_EN isn't supported) */ 11180d322413SEdward Cree efx_mac_reconfigure(efx); 1119874aeea5SJeff Kirsher 1120874aeea5SJeff Kirsher /* Ensure the PHY advertises the correct flow control settings */ 1121874aeea5SJeff Kirsher rc = efx->phy_op->reconfigure(efx); 1122267d9d73SEdward Cree if (rc && rc != -EPERM) 1123874aeea5SJeff Kirsher goto fail2; 1124874aeea5SJeff Kirsher 1125874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 1126874aeea5SJeff Kirsher return 0; 1127874aeea5SJeff Kirsher 1128874aeea5SJeff Kirsher fail2: 1129874aeea5SJeff Kirsher efx->phy_op->fini(efx); 1130874aeea5SJeff Kirsher fail1: 1131874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 1132874aeea5SJeff Kirsher return rc; 1133874aeea5SJeff Kirsher } 1134874aeea5SJeff Kirsher 1135874aeea5SJeff Kirsher static void efx_start_port(struct efx_nic *efx) 1136874aeea5SJeff Kirsher { 1137874aeea5SJeff Kirsher netif_dbg(efx, ifup, efx->net_dev, "start port\n"); 1138874aeea5SJeff Kirsher BUG_ON(efx->port_enabled); 1139874aeea5SJeff Kirsher 1140874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 1141874aeea5SJeff Kirsher efx->port_enabled = true; 1142874aeea5SJeff Kirsher 1143d615c039SBen Hutchings /* Ensure MAC ingress/egress is enabled */ 11440d322413SEdward Cree efx_mac_reconfigure(efx); 1145874aeea5SJeff Kirsher 1146874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 1147874aeea5SJeff Kirsher } 1148874aeea5SJeff Kirsher 1149d615c039SBen Hutchings /* Cancel work for MAC reconfiguration, periodic hardware monitoring 1150d615c039SBen Hutchings * and the async self-test, wait for them to finish and prevent them 1151d615c039SBen Hutchings * being scheduled again. This doesn't cover online resets, which 1152d615c039SBen Hutchings * should only be cancelled when removing the device. 1153d615c039SBen Hutchings */ 1154874aeea5SJeff Kirsher static void efx_stop_port(struct efx_nic *efx) 1155874aeea5SJeff Kirsher { 1156874aeea5SJeff Kirsher netif_dbg(efx, ifdown, efx->net_dev, "stop port\n"); 1157874aeea5SJeff Kirsher 1158d615c039SBen Hutchings EFX_ASSERT_RESET_SERIALISED(efx); 1159d615c039SBen Hutchings 1160874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 1161874aeea5SJeff Kirsher efx->port_enabled = false; 1162874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 1163874aeea5SJeff Kirsher 1164874aeea5SJeff Kirsher /* Serialise against efx_set_multicast_list() */ 1165874aeea5SJeff Kirsher netif_addr_lock_bh(efx->net_dev); 1166874aeea5SJeff Kirsher netif_addr_unlock_bh(efx->net_dev); 1167d615c039SBen Hutchings 1168d615c039SBen Hutchings cancel_delayed_work_sync(&efx->monitor_work); 1169d615c039SBen Hutchings efx_selftest_async_cancel(efx); 1170d615c039SBen Hutchings cancel_work_sync(&efx->mac_work); 1171874aeea5SJeff Kirsher } 1172874aeea5SJeff Kirsher 1173874aeea5SJeff Kirsher static void efx_fini_port(struct efx_nic *efx) 1174874aeea5SJeff Kirsher { 1175874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "shut down port\n"); 1176874aeea5SJeff Kirsher 1177874aeea5SJeff Kirsher if (!efx->port_initialized) 1178874aeea5SJeff Kirsher return; 1179874aeea5SJeff Kirsher 1180874aeea5SJeff Kirsher efx->phy_op->fini(efx); 1181874aeea5SJeff Kirsher efx->port_initialized = false; 1182874aeea5SJeff Kirsher 1183874aeea5SJeff Kirsher efx->link_state.up = false; 1184874aeea5SJeff Kirsher efx_link_status_changed(efx); 1185874aeea5SJeff Kirsher } 1186874aeea5SJeff Kirsher 1187874aeea5SJeff Kirsher static void efx_remove_port(struct efx_nic *efx) 1188874aeea5SJeff Kirsher { 1189874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "destroying port\n"); 1190874aeea5SJeff Kirsher 1191874aeea5SJeff Kirsher efx->type->remove_port(efx); 1192874aeea5SJeff Kirsher } 1193874aeea5SJeff Kirsher 1194874aeea5SJeff Kirsher /************************************************************************** 1195874aeea5SJeff Kirsher * 1196874aeea5SJeff Kirsher * NIC handling 1197874aeea5SJeff Kirsher * 1198874aeea5SJeff Kirsher **************************************************************************/ 1199874aeea5SJeff Kirsher 12000bcf4a64SBen Hutchings static LIST_HEAD(efx_primary_list); 12010bcf4a64SBen Hutchings static LIST_HEAD(efx_unassociated_list); 12020bcf4a64SBen Hutchings 12030bcf4a64SBen Hutchings static bool efx_same_controller(struct efx_nic *left, struct efx_nic *right) 12040bcf4a64SBen Hutchings { 12050bcf4a64SBen Hutchings return left->type == right->type && 12060bcf4a64SBen Hutchings left->vpd_sn && right->vpd_sn && 12070bcf4a64SBen Hutchings !strcmp(left->vpd_sn, right->vpd_sn); 12080bcf4a64SBen Hutchings } 12090bcf4a64SBen Hutchings 12100bcf4a64SBen Hutchings static void efx_associate(struct efx_nic *efx) 12110bcf4a64SBen Hutchings { 12120bcf4a64SBen Hutchings struct efx_nic *other, *next; 12130bcf4a64SBen Hutchings 12140bcf4a64SBen Hutchings if (efx->primary == efx) { 12150bcf4a64SBen Hutchings /* Adding primary function; look for secondaries */ 12160bcf4a64SBen Hutchings 12170bcf4a64SBen Hutchings netif_dbg(efx, probe, efx->net_dev, "adding to primary list\n"); 12180bcf4a64SBen Hutchings list_add_tail(&efx->node, &efx_primary_list); 12190bcf4a64SBen Hutchings 12200bcf4a64SBen Hutchings list_for_each_entry_safe(other, next, &efx_unassociated_list, 12210bcf4a64SBen Hutchings node) { 12220bcf4a64SBen Hutchings if (efx_same_controller(efx, other)) { 12230bcf4a64SBen Hutchings list_del(&other->node); 12240bcf4a64SBen Hutchings netif_dbg(other, probe, other->net_dev, 12250bcf4a64SBen Hutchings "moving to secondary list of %s %s\n", 12260bcf4a64SBen Hutchings pci_name(efx->pci_dev), 12270bcf4a64SBen Hutchings efx->net_dev->name); 12280bcf4a64SBen Hutchings list_add_tail(&other->node, 12290bcf4a64SBen Hutchings &efx->secondary_list); 12300bcf4a64SBen Hutchings other->primary = efx; 12310bcf4a64SBen Hutchings } 12320bcf4a64SBen Hutchings } 12330bcf4a64SBen Hutchings } else { 12340bcf4a64SBen Hutchings /* Adding secondary function; look for primary */ 12350bcf4a64SBen Hutchings 12360bcf4a64SBen Hutchings list_for_each_entry(other, &efx_primary_list, node) { 12370bcf4a64SBen Hutchings if (efx_same_controller(efx, other)) { 12380bcf4a64SBen Hutchings netif_dbg(efx, probe, efx->net_dev, 12390bcf4a64SBen Hutchings "adding to secondary list of %s %s\n", 12400bcf4a64SBen Hutchings pci_name(other->pci_dev), 12410bcf4a64SBen Hutchings other->net_dev->name); 12420bcf4a64SBen Hutchings list_add_tail(&efx->node, 12430bcf4a64SBen Hutchings &other->secondary_list); 12440bcf4a64SBen Hutchings efx->primary = other; 12450bcf4a64SBen Hutchings return; 12460bcf4a64SBen Hutchings } 12470bcf4a64SBen Hutchings } 12480bcf4a64SBen Hutchings 12490bcf4a64SBen Hutchings netif_dbg(efx, probe, efx->net_dev, 12500bcf4a64SBen Hutchings "adding to unassociated list\n"); 12510bcf4a64SBen Hutchings list_add_tail(&efx->node, &efx_unassociated_list); 12520bcf4a64SBen Hutchings } 12530bcf4a64SBen Hutchings } 12540bcf4a64SBen Hutchings 12550bcf4a64SBen Hutchings static void efx_dissociate(struct efx_nic *efx) 12560bcf4a64SBen Hutchings { 12570bcf4a64SBen Hutchings struct efx_nic *other, *next; 12580bcf4a64SBen Hutchings 12590bcf4a64SBen Hutchings list_del(&efx->node); 12600bcf4a64SBen Hutchings efx->primary = NULL; 12610bcf4a64SBen Hutchings 12620bcf4a64SBen Hutchings list_for_each_entry_safe(other, next, &efx->secondary_list, node) { 12630bcf4a64SBen Hutchings list_del(&other->node); 12640bcf4a64SBen Hutchings netif_dbg(other, probe, other->net_dev, 12650bcf4a64SBen Hutchings "moving to unassociated list\n"); 12660bcf4a64SBen Hutchings list_add_tail(&other->node, &efx_unassociated_list); 12670bcf4a64SBen Hutchings other->primary = NULL; 12680bcf4a64SBen Hutchings } 12690bcf4a64SBen Hutchings } 12700bcf4a64SBen Hutchings 1271874aeea5SJeff Kirsher /* This configures the PCI device to enable I/O and DMA. */ 1272874aeea5SJeff Kirsher static int efx_init_io(struct efx_nic *efx) 1273874aeea5SJeff Kirsher { 1274874aeea5SJeff Kirsher struct pci_dev *pci_dev = efx->pci_dev; 1275874aeea5SJeff Kirsher dma_addr_t dma_mask = efx->type->max_dma_mask; 1276b105798fSBen Hutchings unsigned int mem_map_size = efx->type->mem_map_size(efx); 127702246a7fSShradha Shah int rc, bar; 1278874aeea5SJeff Kirsher 1279874aeea5SJeff Kirsher netif_dbg(efx, probe, efx->net_dev, "initialising I/O\n"); 1280874aeea5SJeff Kirsher 128103714bbbSEdward Cree bar = efx->type->mem_bar(efx); 128202246a7fSShradha Shah 1283874aeea5SJeff Kirsher rc = pci_enable_device(pci_dev); 1284874aeea5SJeff Kirsher if (rc) { 1285874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 1286874aeea5SJeff Kirsher "failed to enable PCI device\n"); 1287874aeea5SJeff Kirsher goto fail1; 1288874aeea5SJeff Kirsher } 1289874aeea5SJeff Kirsher 1290874aeea5SJeff Kirsher pci_set_master(pci_dev); 1291874aeea5SJeff Kirsher 1292874aeea5SJeff Kirsher /* Set the PCI DMA mask. Try all possibilities from our 1293874aeea5SJeff Kirsher * genuine mask down to 32 bits, because some architectures 1294874aeea5SJeff Kirsher * (e.g. x86_64 with iommu_sac_force set) will allow 40 bit 1295874aeea5SJeff Kirsher * masks event though they reject 46 bit masks. 1296874aeea5SJeff Kirsher */ 1297874aeea5SJeff Kirsher while (dma_mask > 0x7fffffffUL) { 12989663dedaSRussell King rc = dma_set_mask_and_coherent(&pci_dev->dev, dma_mask); 1299e9e01846SBen Hutchings if (rc == 0) 1300874aeea5SJeff Kirsher break; 1301874aeea5SJeff Kirsher dma_mask >>= 1; 1302874aeea5SJeff Kirsher } 1303874aeea5SJeff Kirsher if (rc) { 1304874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 1305874aeea5SJeff Kirsher "could not find a suitable DMA mask\n"); 1306874aeea5SJeff Kirsher goto fail2; 1307874aeea5SJeff Kirsher } 1308874aeea5SJeff Kirsher netif_dbg(efx, probe, efx->net_dev, 1309874aeea5SJeff Kirsher "using DMA mask %llx\n", (unsigned long long) dma_mask); 1310874aeea5SJeff Kirsher 131102246a7fSShradha Shah efx->membase_phys = pci_resource_start(efx->pci_dev, bar); 131202246a7fSShradha Shah rc = pci_request_region(pci_dev, bar, "sfc"); 1313874aeea5SJeff Kirsher if (rc) { 1314874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 1315874aeea5SJeff Kirsher "request for memory BAR failed\n"); 1316874aeea5SJeff Kirsher rc = -EIO; 1317874aeea5SJeff Kirsher goto fail3; 1318874aeea5SJeff Kirsher } 1319b105798fSBen Hutchings efx->membase = ioremap_nocache(efx->membase_phys, mem_map_size); 1320874aeea5SJeff Kirsher if (!efx->membase) { 1321874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 1322874aeea5SJeff Kirsher "could not map memory BAR at %llx+%x\n", 1323b105798fSBen Hutchings (unsigned long long)efx->membase_phys, mem_map_size); 1324874aeea5SJeff Kirsher rc = -ENOMEM; 1325874aeea5SJeff Kirsher goto fail4; 1326874aeea5SJeff Kirsher } 1327874aeea5SJeff Kirsher netif_dbg(efx, probe, efx->net_dev, 1328874aeea5SJeff Kirsher "memory BAR at %llx+%x (virtual %p)\n", 1329b105798fSBen Hutchings (unsigned long long)efx->membase_phys, mem_map_size, 1330b105798fSBen Hutchings efx->membase); 1331874aeea5SJeff Kirsher 1332874aeea5SJeff Kirsher return 0; 1333874aeea5SJeff Kirsher 1334874aeea5SJeff Kirsher fail4: 133502246a7fSShradha Shah pci_release_region(efx->pci_dev, bar); 1336874aeea5SJeff Kirsher fail3: 1337874aeea5SJeff Kirsher efx->membase_phys = 0; 1338874aeea5SJeff Kirsher fail2: 1339874aeea5SJeff Kirsher pci_disable_device(efx->pci_dev); 1340874aeea5SJeff Kirsher fail1: 1341874aeea5SJeff Kirsher return rc; 1342874aeea5SJeff Kirsher } 1343874aeea5SJeff Kirsher 1344874aeea5SJeff Kirsher static void efx_fini_io(struct efx_nic *efx) 1345874aeea5SJeff Kirsher { 134602246a7fSShradha Shah int bar; 134702246a7fSShradha Shah 1348874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "shutting down I/O\n"); 1349874aeea5SJeff Kirsher 1350874aeea5SJeff Kirsher if (efx->membase) { 1351874aeea5SJeff Kirsher iounmap(efx->membase); 1352874aeea5SJeff Kirsher efx->membase = NULL; 1353874aeea5SJeff Kirsher } 1354874aeea5SJeff Kirsher 1355874aeea5SJeff Kirsher if (efx->membase_phys) { 135603714bbbSEdward Cree bar = efx->type->mem_bar(efx); 135702246a7fSShradha Shah pci_release_region(efx->pci_dev, bar); 1358874aeea5SJeff Kirsher efx->membase_phys = 0; 1359874aeea5SJeff Kirsher } 1360874aeea5SJeff Kirsher 13616598dad2SDaniel Pieczko /* Don't disable bus-mastering if VFs are assigned */ 13626598dad2SDaniel Pieczko if (!pci_vfs_assigned(efx->pci_dev)) 1363874aeea5SJeff Kirsher pci_disable_device(efx->pci_dev); 1364874aeea5SJeff Kirsher } 1365874aeea5SJeff Kirsher 136642356d9aSEdward Cree void efx_set_default_rx_indir_table(struct efx_nic *efx, 136742356d9aSEdward Cree struct efx_rss_context *ctx) 1368267c0157SJon Cooper { 1369267c0157SJon Cooper size_t i; 1370267c0157SJon Cooper 137142356d9aSEdward Cree for (i = 0; i < ARRAY_SIZE(ctx->rx_indir_table); i++) 137242356d9aSEdward Cree ctx->rx_indir_table[i] = 1373267c0157SJon Cooper ethtool_rxfh_indir_default(i, efx->rss_spread); 1374267c0157SJon Cooper } 1375267c0157SJon Cooper 1376a9a52506SBen Hutchings static unsigned int efx_wanted_parallelism(struct efx_nic *efx) 1377874aeea5SJeff Kirsher { 1378cdb08f8fSBen Hutchings cpumask_var_t thread_mask; 1379a16e5b24SBen Hutchings unsigned int count; 1380874aeea5SJeff Kirsher int cpu; 1381874aeea5SJeff Kirsher 1382cd2d5b52SBen Hutchings if (rss_cpus) { 1383cd2d5b52SBen Hutchings count = rss_cpus; 1384cd2d5b52SBen Hutchings } else { 1385cdb08f8fSBen Hutchings if (unlikely(!zalloc_cpumask_var(&thread_mask, GFP_KERNEL))) { 1386a9a52506SBen Hutchings netif_warn(efx, probe, efx->net_dev, 1387a9a52506SBen Hutchings "RSS disabled due to allocation failure\n"); 1388874aeea5SJeff Kirsher return 1; 1389874aeea5SJeff Kirsher } 1390874aeea5SJeff Kirsher 1391874aeea5SJeff Kirsher count = 0; 1392874aeea5SJeff Kirsher for_each_online_cpu(cpu) { 1393cdb08f8fSBen Hutchings if (!cpumask_test_cpu(cpu, thread_mask)) { 1394874aeea5SJeff Kirsher ++count; 1395cdb08f8fSBen Hutchings cpumask_or(thread_mask, thread_mask, 139606931e62SBartosz Golaszewski topology_sibling_cpumask(cpu)); 1397874aeea5SJeff Kirsher } 1398874aeea5SJeff Kirsher } 1399874aeea5SJeff Kirsher 1400cdb08f8fSBen Hutchings free_cpumask_var(thread_mask); 1401cd2d5b52SBen Hutchings } 1402cd2d5b52SBen Hutchings 1403271a8b42SBert Kenward if (count > EFX_MAX_RX_QUEUES) { 1404271a8b42SBert Kenward netif_cond_dbg(efx, probe, efx->net_dev, !rss_cpus, warn, 1405271a8b42SBert Kenward "Reducing number of rx queues from %u to %u.\n", 1406271a8b42SBert Kenward count, EFX_MAX_RX_QUEUES); 1407271a8b42SBert Kenward count = EFX_MAX_RX_QUEUES; 1408271a8b42SBert Kenward } 1409271a8b42SBert Kenward 1410cd2d5b52SBen Hutchings /* If RSS is requested for the PF *and* VFs then we can't write RSS 1411cd2d5b52SBen Hutchings * table entries that are inaccessible to VFs 1412cd2d5b52SBen Hutchings */ 14137fa8d547SShradha Shah #ifdef CONFIG_SFC_SRIOV 14147fa8d547SShradha Shah if (efx->type->sriov_wanted) { 1415d98a4ffeSShradha Shah if (efx->type->sriov_wanted(efx) && efx_vf_size(efx) > 1 && 1416cd2d5b52SBen Hutchings count > efx_vf_size(efx)) { 1417cd2d5b52SBen Hutchings netif_warn(efx, probe, efx->net_dev, 1418cd2d5b52SBen Hutchings "Reducing number of RSS channels from %u to %u for " 1419cd2d5b52SBen Hutchings "VF support. Increase vf-msix-limit to use more " 1420cd2d5b52SBen Hutchings "channels on the PF.\n", 1421cd2d5b52SBen Hutchings count, efx_vf_size(efx)); 1422cd2d5b52SBen Hutchings count = efx_vf_size(efx); 1423cd2d5b52SBen Hutchings } 14247fa8d547SShradha Shah } 14257fa8d547SShradha Shah #endif 1426cd2d5b52SBen Hutchings 1427874aeea5SJeff Kirsher return count; 1428874aeea5SJeff Kirsher } 1429874aeea5SJeff Kirsher 1430874aeea5SJeff Kirsher /* Probe the number and type of interrupts we are able to obtain, and 1431874aeea5SJeff Kirsher * the resulting numbers of channels and RX queues. 1432874aeea5SJeff Kirsher */ 1433874aeea5SJeff Kirsher static int efx_probe_interrupts(struct efx_nic *efx) 1434874aeea5SJeff Kirsher { 14357f967c01SBen Hutchings unsigned int extra_channels = 0; 14367f967c01SBen Hutchings unsigned int i, j; 1437a16e5b24SBen Hutchings int rc; 1438874aeea5SJeff Kirsher 14397f967c01SBen Hutchings for (i = 0; i < EFX_MAX_EXTRA_CHANNELS; i++) 14407f967c01SBen Hutchings if (efx->extra_channel_type[i]) 14417f967c01SBen Hutchings ++extra_channels; 14427f967c01SBen Hutchings 1443874aeea5SJeff Kirsher if (efx->interrupt_mode == EFX_INT_MODE_MSIX) { 1444874aeea5SJeff Kirsher struct msix_entry xentries[EFX_MAX_CHANNELS]; 1445a16e5b24SBen Hutchings unsigned int n_channels; 1446874aeea5SJeff Kirsher 1447a9a52506SBen Hutchings n_channels = efx_wanted_parallelism(efx); 1448b0fbdae1SShradha Shah if (efx_separate_tx_channels) 1449874aeea5SJeff Kirsher n_channels *= 2; 14507f967c01SBen Hutchings n_channels += extra_channels; 1451b105798fSBen Hutchings n_channels = min(n_channels, efx->max_channels); 1452874aeea5SJeff Kirsher 1453874aeea5SJeff Kirsher for (i = 0; i < n_channels; i++) 1454874aeea5SJeff Kirsher xentries[i].entry = i; 1455184603d8SAlexander Gordeev rc = pci_enable_msix_range(efx->pci_dev, 1456184603d8SAlexander Gordeev xentries, 1, n_channels); 1457184603d8SAlexander Gordeev if (rc < 0) { 1458184603d8SAlexander Gordeev /* Fall back to single channel MSI */ 1459184603d8SAlexander Gordeev netif_err(efx, drv, efx->net_dev, 1460184603d8SAlexander Gordeev "could not enable MSI-X\n"); 146162980cb6SAndrew Rybchenko if (efx->type->min_interrupt_mode >= EFX_INT_MODE_MSI) 146262980cb6SAndrew Rybchenko efx->interrupt_mode = EFX_INT_MODE_MSI; 146362980cb6SAndrew Rybchenko else 146462980cb6SAndrew Rybchenko return rc; 1465184603d8SAlexander Gordeev } else if (rc < n_channels) { 1466874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, 1467874aeea5SJeff Kirsher "WARNING: Insufficient MSI-X vectors" 1468a16e5b24SBen Hutchings " available (%d < %u).\n", rc, n_channels); 1469874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, 1470874aeea5SJeff Kirsher "WARNING: Performance may be reduced.\n"); 1471874aeea5SJeff Kirsher n_channels = rc; 1472874aeea5SJeff Kirsher } 1473874aeea5SJeff Kirsher 1474184603d8SAlexander Gordeev if (rc > 0) { 1475874aeea5SJeff Kirsher efx->n_channels = n_channels; 14767f967c01SBen Hutchings if (n_channels > extra_channels) 14777f967c01SBen Hutchings n_channels -= extra_channels; 1478b0fbdae1SShradha Shah if (efx_separate_tx_channels) { 1479b0fbdae1SShradha Shah efx->n_tx_channels = min(max(n_channels / 2, 1480b0fbdae1SShradha Shah 1U), 1481b0fbdae1SShradha Shah efx->max_tx_channels); 14827f967c01SBen Hutchings efx->n_rx_channels = max(n_channels - 14837f967c01SBen Hutchings efx->n_tx_channels, 14847f967c01SBen Hutchings 1U); 1485874aeea5SJeff Kirsher } else { 1486b0fbdae1SShradha Shah efx->n_tx_channels = min(n_channels, 1487b0fbdae1SShradha Shah efx->max_tx_channels); 14887f967c01SBen Hutchings efx->n_rx_channels = n_channels; 1489874aeea5SJeff Kirsher } 14907f967c01SBen Hutchings for (i = 0; i < efx->n_channels; i++) 1491874aeea5SJeff Kirsher efx_get_channel(efx, i)->irq = 1492874aeea5SJeff Kirsher xentries[i].vector; 1493874aeea5SJeff Kirsher } 1494874aeea5SJeff Kirsher } 1495874aeea5SJeff Kirsher 1496874aeea5SJeff Kirsher /* Try single interrupt MSI */ 1497874aeea5SJeff Kirsher if (efx->interrupt_mode == EFX_INT_MODE_MSI) { 1498874aeea5SJeff Kirsher efx->n_channels = 1; 1499874aeea5SJeff Kirsher efx->n_rx_channels = 1; 1500874aeea5SJeff Kirsher efx->n_tx_channels = 1; 1501874aeea5SJeff Kirsher rc = pci_enable_msi(efx->pci_dev); 1502874aeea5SJeff Kirsher if (rc == 0) { 1503874aeea5SJeff Kirsher efx_get_channel(efx, 0)->irq = efx->pci_dev->irq; 1504874aeea5SJeff Kirsher } else { 1505874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, 1506874aeea5SJeff Kirsher "could not enable MSI\n"); 150762980cb6SAndrew Rybchenko if (efx->type->min_interrupt_mode >= EFX_INT_MODE_LEGACY) 1508874aeea5SJeff Kirsher efx->interrupt_mode = EFX_INT_MODE_LEGACY; 150962980cb6SAndrew Rybchenko else 151062980cb6SAndrew Rybchenko return rc; 1511874aeea5SJeff Kirsher } 1512874aeea5SJeff Kirsher } 1513874aeea5SJeff Kirsher 1514874aeea5SJeff Kirsher /* Assume legacy interrupts */ 1515874aeea5SJeff Kirsher if (efx->interrupt_mode == EFX_INT_MODE_LEGACY) { 1516b0fbdae1SShradha Shah efx->n_channels = 1 + (efx_separate_tx_channels ? 1 : 0); 1517874aeea5SJeff Kirsher efx->n_rx_channels = 1; 1518874aeea5SJeff Kirsher efx->n_tx_channels = 1; 1519874aeea5SJeff Kirsher efx->legacy_irq = efx->pci_dev->irq; 1520874aeea5SJeff Kirsher } 1521874aeea5SJeff Kirsher 15227f967c01SBen Hutchings /* Assign extra channels if possible */ 15232935e3c3SEdward Cree efx->n_extra_tx_channels = 0; 15247f967c01SBen Hutchings j = efx->n_channels; 15257f967c01SBen Hutchings for (i = 0; i < EFX_MAX_EXTRA_CHANNELS; i++) { 15267f967c01SBen Hutchings if (!efx->extra_channel_type[i]) 15277f967c01SBen Hutchings continue; 15287f967c01SBen Hutchings if (efx->interrupt_mode != EFX_INT_MODE_MSIX || 15297f967c01SBen Hutchings efx->n_channels <= extra_channels) { 15307f967c01SBen Hutchings efx->extra_channel_type[i]->handle_no_channel(efx); 15317f967c01SBen Hutchings } else { 15327f967c01SBen Hutchings --j; 15337f967c01SBen Hutchings efx_get_channel(efx, j)->type = 15347f967c01SBen Hutchings efx->extra_channel_type[i]; 15352935e3c3SEdward Cree if (efx_channel_has_tx_queues(efx_get_channel(efx, j))) 15362935e3c3SEdward Cree efx->n_extra_tx_channels++; 15377f967c01SBen Hutchings } 15387f967c01SBen Hutchings } 15397f967c01SBen Hutchings 1540cd2d5b52SBen Hutchings /* RSS might be usable on VFs even if it is disabled on the PF */ 15417fa8d547SShradha Shah #ifdef CONFIG_SFC_SRIOV 15427fa8d547SShradha Shah if (efx->type->sriov_wanted) { 1543327c685eSShradha Shah efx->rss_spread = ((efx->n_rx_channels > 1 || 1544d98a4ffeSShradha Shah !efx->type->sriov_wanted(efx)) ? 1545cd2d5b52SBen Hutchings efx->n_rx_channels : efx_vf_size(efx)); 15467fa8d547SShradha Shah return 0; 15477fa8d547SShradha Shah } 15487fa8d547SShradha Shah #endif 15497fa8d547SShradha Shah efx->rss_spread = efx->n_rx_channels; 1550cd2d5b52SBen Hutchings 1551874aeea5SJeff Kirsher return 0; 1552874aeea5SJeff Kirsher } 1553874aeea5SJeff Kirsher 1554a83762d9SBert Kenward #if defined(CONFIG_SMP) 1555a83762d9SBert Kenward static void efx_set_interrupt_affinity(struct efx_nic *efx) 1556a83762d9SBert Kenward { 1557a83762d9SBert Kenward struct efx_channel *channel; 1558a83762d9SBert Kenward unsigned int cpu; 1559a83762d9SBert Kenward 1560a83762d9SBert Kenward efx_for_each_channel(channel, efx) { 1561a83762d9SBert Kenward cpu = cpumask_local_spread(channel->channel, 1562a83762d9SBert Kenward pcibus_to_node(efx->pci_dev->bus)); 1563a83762d9SBert Kenward irq_set_affinity_hint(channel->irq, cpumask_of(cpu)); 1564a83762d9SBert Kenward } 1565a83762d9SBert Kenward } 1566a83762d9SBert Kenward 1567a83762d9SBert Kenward static void efx_clear_interrupt_affinity(struct efx_nic *efx) 1568a83762d9SBert Kenward { 1569a83762d9SBert Kenward struct efx_channel *channel; 1570a83762d9SBert Kenward 1571a83762d9SBert Kenward efx_for_each_channel(channel, efx) 1572a83762d9SBert Kenward irq_set_affinity_hint(channel->irq, NULL); 1573a83762d9SBert Kenward } 1574a83762d9SBert Kenward #else 1575a83762d9SBert Kenward static void 1576a83762d9SBert Kenward efx_set_interrupt_affinity(struct efx_nic *efx __attribute__ ((unused))) 1577a83762d9SBert Kenward { 1578a83762d9SBert Kenward } 1579a83762d9SBert Kenward 1580a83762d9SBert Kenward static void 1581a83762d9SBert Kenward efx_clear_interrupt_affinity(struct efx_nic *efx __attribute__ ((unused))) 1582a83762d9SBert Kenward { 1583a83762d9SBert Kenward } 1584a83762d9SBert Kenward #endif /* CONFIG_SMP */ 1585a83762d9SBert Kenward 1586261e4d96SJon Cooper static int efx_soft_enable_interrupts(struct efx_nic *efx) 1587d8291187SBen Hutchings { 1588261e4d96SJon Cooper struct efx_channel *channel, *end_channel; 1589261e4d96SJon Cooper int rc; 1590d8291187SBen Hutchings 1591d8291187SBen Hutchings BUG_ON(efx->state == STATE_DISABLED); 1592d8291187SBen Hutchings 1593d8291187SBen Hutchings efx->irq_soft_enabled = true; 1594d8291187SBen Hutchings smp_wmb(); 1595d8291187SBen Hutchings 1596d8291187SBen Hutchings efx_for_each_channel(channel, efx) { 1597261e4d96SJon Cooper if (!channel->type->keep_eventq) { 1598261e4d96SJon Cooper rc = efx_init_eventq(channel); 1599261e4d96SJon Cooper if (rc) 1600261e4d96SJon Cooper goto fail; 1601261e4d96SJon Cooper } 1602d8291187SBen Hutchings efx_start_eventq(channel); 1603d8291187SBen Hutchings } 1604d8291187SBen Hutchings 1605d8291187SBen Hutchings efx_mcdi_mode_event(efx); 1606261e4d96SJon Cooper 1607261e4d96SJon Cooper return 0; 1608261e4d96SJon Cooper fail: 1609261e4d96SJon Cooper end_channel = channel; 1610261e4d96SJon Cooper efx_for_each_channel(channel, efx) { 1611261e4d96SJon Cooper if (channel == end_channel) 1612261e4d96SJon Cooper break; 1613261e4d96SJon Cooper efx_stop_eventq(channel); 1614261e4d96SJon Cooper if (!channel->type->keep_eventq) 1615261e4d96SJon Cooper efx_fini_eventq(channel); 1616261e4d96SJon Cooper } 1617261e4d96SJon Cooper 1618261e4d96SJon Cooper return rc; 1619d8291187SBen Hutchings } 1620d8291187SBen Hutchings 1621d8291187SBen Hutchings static void efx_soft_disable_interrupts(struct efx_nic *efx) 1622d8291187SBen Hutchings { 1623d8291187SBen Hutchings struct efx_channel *channel; 1624d8291187SBen Hutchings 1625d8291187SBen Hutchings if (efx->state == STATE_DISABLED) 1626d8291187SBen Hutchings return; 1627d8291187SBen Hutchings 1628d8291187SBen Hutchings efx_mcdi_mode_poll(efx); 1629d8291187SBen Hutchings 1630d8291187SBen Hutchings efx->irq_soft_enabled = false; 1631d8291187SBen Hutchings smp_wmb(); 1632d8291187SBen Hutchings 1633d8291187SBen Hutchings if (efx->legacy_irq) 1634d8291187SBen Hutchings synchronize_irq(efx->legacy_irq); 1635d8291187SBen Hutchings 1636d8291187SBen Hutchings efx_for_each_channel(channel, efx) { 1637d8291187SBen Hutchings if (channel->irq) 1638d8291187SBen Hutchings synchronize_irq(channel->irq); 1639d8291187SBen Hutchings 1640d8291187SBen Hutchings efx_stop_eventq(channel); 1641d8291187SBen Hutchings if (!channel->type->keep_eventq) 1642d8291187SBen Hutchings efx_fini_eventq(channel); 1643d8291187SBen Hutchings } 1644cade715fSBen Hutchings 1645cade715fSBen Hutchings /* Flush the asynchronous MCDI request queue */ 1646cade715fSBen Hutchings efx_mcdi_flush_async(efx); 1647d8291187SBen Hutchings } 1648d8291187SBen Hutchings 1649261e4d96SJon Cooper static int efx_enable_interrupts(struct efx_nic *efx) 16509f2cb71cSBen Hutchings { 1651261e4d96SJon Cooper struct efx_channel *channel, *end_channel; 1652261e4d96SJon Cooper int rc; 16539f2cb71cSBen Hutchings 16548b7325b4SBen Hutchings BUG_ON(efx->state == STATE_DISABLED); 16558b7325b4SBen Hutchings 1656b28405b0SAlexandre Rames if (efx->eeh_disabled_legacy_irq) { 1657b28405b0SAlexandre Rames enable_irq(efx->legacy_irq); 1658b28405b0SAlexandre Rames efx->eeh_disabled_legacy_irq = false; 1659b28405b0SAlexandre Rames } 1660d8291187SBen Hutchings 166186094f7fSBen Hutchings efx->type->irq_enable_master(efx); 16629f2cb71cSBen Hutchings 16639f2cb71cSBen Hutchings efx_for_each_channel(channel, efx) { 1664261e4d96SJon Cooper if (channel->type->keep_eventq) { 1665261e4d96SJon Cooper rc = efx_init_eventq(channel); 1666261e4d96SJon Cooper if (rc) 1667261e4d96SJon Cooper goto fail; 1668261e4d96SJon Cooper } 16699f2cb71cSBen Hutchings } 16709f2cb71cSBen Hutchings 1671261e4d96SJon Cooper rc = efx_soft_enable_interrupts(efx); 1672261e4d96SJon Cooper if (rc) 1673261e4d96SJon Cooper goto fail; 1674261e4d96SJon Cooper 1675261e4d96SJon Cooper return 0; 1676261e4d96SJon Cooper 1677261e4d96SJon Cooper fail: 1678261e4d96SJon Cooper end_channel = channel; 1679261e4d96SJon Cooper efx_for_each_channel(channel, efx) { 1680261e4d96SJon Cooper if (channel == end_channel) 1681261e4d96SJon Cooper break; 1682261e4d96SJon Cooper if (channel->type->keep_eventq) 1683261e4d96SJon Cooper efx_fini_eventq(channel); 1684261e4d96SJon Cooper } 1685261e4d96SJon Cooper 1686261e4d96SJon Cooper efx->type->irq_disable_non_ev(efx); 1687261e4d96SJon Cooper 1688261e4d96SJon Cooper return rc; 16899f2cb71cSBen Hutchings } 16909f2cb71cSBen Hutchings 1691d8291187SBen Hutchings static void efx_disable_interrupts(struct efx_nic *efx) 16929f2cb71cSBen Hutchings { 16939f2cb71cSBen Hutchings struct efx_channel *channel; 16949f2cb71cSBen Hutchings 1695d8291187SBen Hutchings efx_soft_disable_interrupts(efx); 16969f2cb71cSBen Hutchings 16979f2cb71cSBen Hutchings efx_for_each_channel(channel, efx) { 1698d8291187SBen Hutchings if (channel->type->keep_eventq) 16999f2cb71cSBen Hutchings efx_fini_eventq(channel); 17009f2cb71cSBen Hutchings } 1701d8291187SBen Hutchings 170286094f7fSBen Hutchings efx->type->irq_disable_non_ev(efx); 17039f2cb71cSBen Hutchings } 17049f2cb71cSBen Hutchings 1705874aeea5SJeff Kirsher static void efx_remove_interrupts(struct efx_nic *efx) 1706874aeea5SJeff Kirsher { 1707874aeea5SJeff Kirsher struct efx_channel *channel; 1708874aeea5SJeff Kirsher 1709874aeea5SJeff Kirsher /* Remove MSI/MSI-X interrupts */ 1710874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) 1711874aeea5SJeff Kirsher channel->irq = 0; 1712874aeea5SJeff Kirsher pci_disable_msi(efx->pci_dev); 1713874aeea5SJeff Kirsher pci_disable_msix(efx->pci_dev); 1714874aeea5SJeff Kirsher 1715874aeea5SJeff Kirsher /* Remove legacy interrupt */ 1716874aeea5SJeff Kirsher efx->legacy_irq = 0; 1717874aeea5SJeff Kirsher } 1718874aeea5SJeff Kirsher 1719874aeea5SJeff Kirsher static void efx_set_channels(struct efx_nic *efx) 1720874aeea5SJeff Kirsher { 1721874aeea5SJeff Kirsher struct efx_channel *channel; 1722874aeea5SJeff Kirsher struct efx_tx_queue *tx_queue; 1723874aeea5SJeff Kirsher 1724874aeea5SJeff Kirsher efx->tx_channel_offset = 1725b0fbdae1SShradha Shah efx_separate_tx_channels ? 1726b0fbdae1SShradha Shah efx->n_channels - efx->n_tx_channels : 0; 1727874aeea5SJeff Kirsher 172879d68b37SStuart Hodgson /* We need to mark which channels really have RX and TX 172979d68b37SStuart Hodgson * queues, and adjust the TX queue numbers if we have separate 1730874aeea5SJeff Kirsher * RX-only and TX-only channels. 1731874aeea5SJeff Kirsher */ 1732874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) { 173379d68b37SStuart Hodgson if (channel->channel < efx->n_rx_channels) 173479d68b37SStuart Hodgson channel->rx_queue.core_index = channel->channel; 173579d68b37SStuart Hodgson else 173679d68b37SStuart Hodgson channel->rx_queue.core_index = -1; 173779d68b37SStuart Hodgson 1738874aeea5SJeff Kirsher efx_for_each_channel_tx_queue(tx_queue, channel) 1739874aeea5SJeff Kirsher tx_queue->queue -= (efx->tx_channel_offset * 1740874aeea5SJeff Kirsher EFX_TXQ_TYPES); 1741874aeea5SJeff Kirsher } 1742874aeea5SJeff Kirsher } 1743874aeea5SJeff Kirsher 1744874aeea5SJeff Kirsher static int efx_probe_nic(struct efx_nic *efx) 1745874aeea5SJeff Kirsher { 1746874aeea5SJeff Kirsher int rc; 1747874aeea5SJeff Kirsher 1748874aeea5SJeff Kirsher netif_dbg(efx, probe, efx->net_dev, "creating NIC\n"); 1749874aeea5SJeff Kirsher 1750874aeea5SJeff Kirsher /* Carry out hardware-type specific initialisation */ 1751874aeea5SJeff Kirsher rc = efx->type->probe(efx); 1752874aeea5SJeff Kirsher if (rc) 1753874aeea5SJeff Kirsher return rc; 1754874aeea5SJeff Kirsher 1755b0fbdae1SShradha Shah do { 1756b0fbdae1SShradha Shah if (!efx->max_channels || !efx->max_tx_channels) { 1757b0fbdae1SShradha Shah netif_err(efx, drv, efx->net_dev, 1758b0fbdae1SShradha Shah "Insufficient resources to allocate" 1759b0fbdae1SShradha Shah " any channels\n"); 1760b0fbdae1SShradha Shah rc = -ENOSPC; 1761b0fbdae1SShradha Shah goto fail1; 1762b0fbdae1SShradha Shah } 1763b0fbdae1SShradha Shah 1764b0fbdae1SShradha Shah /* Determine the number of channels and queues by trying 1765b0fbdae1SShradha Shah * to hook in MSI-X interrupts. 1766b0fbdae1SShradha Shah */ 1767874aeea5SJeff Kirsher rc = efx_probe_interrupts(efx); 1768874aeea5SJeff Kirsher if (rc) 1769c15eed22SBen Hutchings goto fail1; 1770874aeea5SJeff Kirsher 177152ad762bSDaniel Pieczko efx_set_channels(efx); 177252ad762bSDaniel Pieczko 1773b0fbdae1SShradha Shah /* dimension_resources can fail with EAGAIN */ 1774c15eed22SBen Hutchings rc = efx->type->dimension_resources(efx); 1775b0fbdae1SShradha Shah if (rc != 0 && rc != -EAGAIN) 1776c15eed22SBen Hutchings goto fail2; 177728e47c49SBen Hutchings 1778b0fbdae1SShradha Shah if (rc == -EAGAIN) 1779b0fbdae1SShradha Shah /* try again with new max_channels */ 1780b0fbdae1SShradha Shah efx_remove_interrupts(efx); 1781b0fbdae1SShradha Shah 1782b0fbdae1SShradha Shah } while (rc == -EAGAIN); 1783b0fbdae1SShradha Shah 1784874aeea5SJeff Kirsher if (efx->n_channels > 1) 178542356d9aSEdward Cree netdev_rss_key_fill(efx->rss_context.rx_hash_key, 178642356d9aSEdward Cree sizeof(efx->rss_context.rx_hash_key)); 178742356d9aSEdward Cree efx_set_default_rx_indir_table(efx, &efx->rss_context); 1788874aeea5SJeff Kirsher 1789874aeea5SJeff Kirsher netif_set_real_num_tx_queues(efx->net_dev, efx->n_tx_channels); 1790874aeea5SJeff Kirsher netif_set_real_num_rx_queues(efx->net_dev, efx->n_rx_channels); 1791874aeea5SJeff Kirsher 1792874aeea5SJeff Kirsher /* Initialise the interrupt moderation settings */ 1793539de7c5SBert Kenward efx->irq_mod_step_us = DIV_ROUND_UP(efx->timer_quantum_ns, 1000); 17949e393b30SBen Hutchings efx_init_irq_moderation(efx, tx_irq_mod_usec, rx_irq_mod_usec, true, 17959e393b30SBen Hutchings true); 1796874aeea5SJeff Kirsher 1797874aeea5SJeff Kirsher return 0; 1798874aeea5SJeff Kirsher 1799c15eed22SBen Hutchings fail2: 1800c15eed22SBen Hutchings efx_remove_interrupts(efx); 1801c15eed22SBen Hutchings fail1: 1802874aeea5SJeff Kirsher efx->type->remove(efx); 1803874aeea5SJeff Kirsher return rc; 1804874aeea5SJeff Kirsher } 1805874aeea5SJeff Kirsher 1806874aeea5SJeff Kirsher static void efx_remove_nic(struct efx_nic *efx) 1807874aeea5SJeff Kirsher { 1808874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "destroying NIC\n"); 1809874aeea5SJeff Kirsher 1810874aeea5SJeff Kirsher efx_remove_interrupts(efx); 1811874aeea5SJeff Kirsher efx->type->remove(efx); 1812874aeea5SJeff Kirsher } 1813874aeea5SJeff Kirsher 1814add72477SBen Hutchings static int efx_probe_filters(struct efx_nic *efx) 1815add72477SBen Hutchings { 1816add72477SBen Hutchings int rc; 1817add72477SBen Hutchings 18180d322413SEdward Cree init_rwsem(&efx->filter_sem); 1819d248953aSMartin Habets mutex_lock(&efx->mac_lock); 18200d322413SEdward Cree down_write(&efx->filter_sem); 1821add72477SBen Hutchings rc = efx->type->filter_table_probe(efx); 1822add72477SBen Hutchings if (rc) 18230d322413SEdward Cree goto out_unlock; 1824add72477SBen Hutchings 1825add72477SBen Hutchings #ifdef CONFIG_RFS_ACCEL 1826add72477SBen Hutchings if (efx->type->offload_features & NETIF_F_NTUPLE) { 1827faf8dcc1SJon Cooper struct efx_channel *channel; 1828faf8dcc1SJon Cooper int i, success = 1; 1829faf8dcc1SJon Cooper 1830faf8dcc1SJon Cooper efx_for_each_channel(channel, efx) { 1831faf8dcc1SJon Cooper channel->rps_flow_id = 1832faf8dcc1SJon Cooper kcalloc(efx->type->max_rx_ip_filters, 1833faf8dcc1SJon Cooper sizeof(*channel->rps_flow_id), 1834add72477SBen Hutchings GFP_KERNEL); 1835faf8dcc1SJon Cooper if (!channel->rps_flow_id) 1836faf8dcc1SJon Cooper success = 0; 1837faf8dcc1SJon Cooper else 1838faf8dcc1SJon Cooper for (i = 0; 1839faf8dcc1SJon Cooper i < efx->type->max_rx_ip_filters; 1840faf8dcc1SJon Cooper ++i) 1841faf8dcc1SJon Cooper channel->rps_flow_id[i] = 1842faf8dcc1SJon Cooper RPS_FLOW_ID_INVALID; 1843faf8dcc1SJon Cooper } 1844faf8dcc1SJon Cooper 1845faf8dcc1SJon Cooper if (!success) { 1846faf8dcc1SJon Cooper efx_for_each_channel(channel, efx) 1847faf8dcc1SJon Cooper kfree(channel->rps_flow_id); 1848add72477SBen Hutchings efx->type->filter_table_remove(efx); 18490d322413SEdward Cree rc = -ENOMEM; 18500d322413SEdward Cree goto out_unlock; 1851add72477SBen Hutchings } 1852faf8dcc1SJon Cooper 1853faf8dcc1SJon Cooper efx->rps_expire_index = efx->rps_expire_channel = 0; 1854add72477SBen Hutchings } 1855add72477SBen Hutchings #endif 18560d322413SEdward Cree out_unlock: 18570d322413SEdward Cree up_write(&efx->filter_sem); 1858d248953aSMartin Habets mutex_unlock(&efx->mac_lock); 18590d322413SEdward Cree return rc; 1860add72477SBen Hutchings } 1861add72477SBen Hutchings 1862add72477SBen Hutchings static void efx_remove_filters(struct efx_nic *efx) 1863add72477SBen Hutchings { 1864add72477SBen Hutchings #ifdef CONFIG_RFS_ACCEL 1865faf8dcc1SJon Cooper struct efx_channel *channel; 1866faf8dcc1SJon Cooper 1867faf8dcc1SJon Cooper efx_for_each_channel(channel, efx) 1868faf8dcc1SJon Cooper kfree(channel->rps_flow_id); 1869add72477SBen Hutchings #endif 18700d322413SEdward Cree down_write(&efx->filter_sem); 1871add72477SBen Hutchings efx->type->filter_table_remove(efx); 18720d322413SEdward Cree up_write(&efx->filter_sem); 1873add72477SBen Hutchings } 1874add72477SBen Hutchings 1875add72477SBen Hutchings static void efx_restore_filters(struct efx_nic *efx) 1876add72477SBen Hutchings { 18770d322413SEdward Cree down_read(&efx->filter_sem); 1878add72477SBen Hutchings efx->type->filter_table_restore(efx); 18790d322413SEdward Cree up_read(&efx->filter_sem); 1880add72477SBen Hutchings } 1881add72477SBen Hutchings 1882874aeea5SJeff Kirsher /************************************************************************** 1883874aeea5SJeff Kirsher * 1884874aeea5SJeff Kirsher * NIC startup/shutdown 1885874aeea5SJeff Kirsher * 1886874aeea5SJeff Kirsher *************************************************************************/ 1887874aeea5SJeff Kirsher 1888874aeea5SJeff Kirsher static int efx_probe_all(struct efx_nic *efx) 1889874aeea5SJeff Kirsher { 1890874aeea5SJeff Kirsher int rc; 1891874aeea5SJeff Kirsher 1892874aeea5SJeff Kirsher rc = efx_probe_nic(efx); 1893874aeea5SJeff Kirsher if (rc) { 1894874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, "failed to create NIC\n"); 1895874aeea5SJeff Kirsher goto fail1; 1896874aeea5SJeff Kirsher } 1897874aeea5SJeff Kirsher 1898874aeea5SJeff Kirsher rc = efx_probe_port(efx); 1899874aeea5SJeff Kirsher if (rc) { 1900874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, "failed to create port\n"); 1901874aeea5SJeff Kirsher goto fail2; 1902874aeea5SJeff Kirsher } 1903874aeea5SJeff Kirsher 19047e6d06f0SBen Hutchings BUILD_BUG_ON(EFX_DEFAULT_DMAQ_SIZE < EFX_RXQ_MIN_ENT); 19057e6d06f0SBen Hutchings if (WARN_ON(EFX_DEFAULT_DMAQ_SIZE < EFX_TXQ_MIN_ENT(efx))) { 19067e6d06f0SBen Hutchings rc = -EINVAL; 19077e6d06f0SBen Hutchings goto fail3; 19087e6d06f0SBen Hutchings } 1909874aeea5SJeff Kirsher efx->rxq_entries = efx->txq_entries = EFX_DEFAULT_DMAQ_SIZE; 1910874aeea5SJeff Kirsher 19116d8aaaf6SDaniel Pieczko #ifdef CONFIG_SFC_SRIOV 19126d8aaaf6SDaniel Pieczko rc = efx->type->vswitching_probe(efx); 19136d8aaaf6SDaniel Pieczko if (rc) /* not fatal; the PF will still work fine */ 19146d8aaaf6SDaniel Pieczko netif_warn(efx, probe, efx->net_dev, 19156d8aaaf6SDaniel Pieczko "failed to setup vswitching rc=%d;" 19166d8aaaf6SDaniel Pieczko " VFs may not function\n", rc); 19176d8aaaf6SDaniel Pieczko #endif 19186d8aaaf6SDaniel Pieczko 1919874aeea5SJeff Kirsher rc = efx_probe_filters(efx); 1920874aeea5SJeff Kirsher if (rc) { 1921874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 1922874aeea5SJeff Kirsher "failed to create filter tables\n"); 19236d8aaaf6SDaniel Pieczko goto fail4; 1924874aeea5SJeff Kirsher } 1925874aeea5SJeff Kirsher 19267f967c01SBen Hutchings rc = efx_probe_channels(efx); 19277f967c01SBen Hutchings if (rc) 19286d8aaaf6SDaniel Pieczko goto fail5; 19297f967c01SBen Hutchings 1930874aeea5SJeff Kirsher return 0; 1931874aeea5SJeff Kirsher 19326d8aaaf6SDaniel Pieczko fail5: 19337f967c01SBen Hutchings efx_remove_filters(efx); 19346d8aaaf6SDaniel Pieczko fail4: 19356d8aaaf6SDaniel Pieczko #ifdef CONFIG_SFC_SRIOV 19366d8aaaf6SDaniel Pieczko efx->type->vswitching_remove(efx); 19376d8aaaf6SDaniel Pieczko #endif 1938874aeea5SJeff Kirsher fail3: 1939874aeea5SJeff Kirsher efx_remove_port(efx); 1940874aeea5SJeff Kirsher fail2: 1941874aeea5SJeff Kirsher efx_remove_nic(efx); 1942874aeea5SJeff Kirsher fail1: 1943874aeea5SJeff Kirsher return rc; 1944874aeea5SJeff Kirsher } 1945874aeea5SJeff Kirsher 19468b7325b4SBen Hutchings /* If the interface is supposed to be running but is not, start 19478b7325b4SBen Hutchings * the hardware and software data path, regular activity for the port 19488b7325b4SBen Hutchings * (MAC statistics, link polling, etc.) and schedule the port to be 19498b7325b4SBen Hutchings * reconfigured. Interrupts must already be enabled. This function 19508b7325b4SBen Hutchings * is safe to call multiple times, so long as the NIC is not disabled. 19518b7325b4SBen Hutchings * Requires the RTNL lock. 19529f2cb71cSBen Hutchings */ 1953874aeea5SJeff Kirsher static void efx_start_all(struct efx_nic *efx) 1954874aeea5SJeff Kirsher { 1955874aeea5SJeff Kirsher EFX_ASSERT_RESET_SERIALISED(efx); 19568b7325b4SBen Hutchings BUG_ON(efx->state == STATE_DISABLED); 1957874aeea5SJeff Kirsher 1958874aeea5SJeff Kirsher /* Check that it is appropriate to restart the interface. All 1959874aeea5SJeff Kirsher * of these flags are safe to read under just the rtnl lock */ 1960e283546cSEdward Cree if (efx->port_enabled || !netif_running(efx->net_dev) || 1961e283546cSEdward Cree efx->reset_pending) 1962874aeea5SJeff Kirsher return; 1963874aeea5SJeff Kirsher 1964874aeea5SJeff Kirsher efx_start_port(efx); 19659f2cb71cSBen Hutchings efx_start_datapath(efx); 1966874aeea5SJeff Kirsher 1967626950dbSAlexandre Rames /* Start the hardware monitor if there is one */ 1968626950dbSAlexandre Rames if (efx->type->monitor != NULL) 1969874aeea5SJeff Kirsher queue_delayed_work(efx->workqueue, &efx->monitor_work, 1970874aeea5SJeff Kirsher efx_monitor_interval); 1971626950dbSAlexandre Rames 19725a6681e2SEdward Cree /* Link state detection is normally event-driven; we have 1973626950dbSAlexandre Rames * to poll now because we could have missed a change 1974626950dbSAlexandre Rames */ 1975874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 1976874aeea5SJeff Kirsher if (efx->phy_op->poll(efx)) 1977874aeea5SJeff Kirsher efx_link_status_changed(efx); 1978874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 1979874aeea5SJeff Kirsher 1980874aeea5SJeff Kirsher efx->type->start_stats(efx); 1981f8f3b5aeSJon Cooper efx->type->pull_stats(efx); 1982f8f3b5aeSJon Cooper spin_lock_bh(&efx->stats_lock); 1983f8f3b5aeSJon Cooper efx->type->update_stats(efx, NULL, NULL); 1984f8f3b5aeSJon Cooper spin_unlock_bh(&efx->stats_lock); 1985874aeea5SJeff Kirsher } 1986874aeea5SJeff Kirsher 19878b7325b4SBen Hutchings /* Quiesce the hardware and software data path, and regular activity 19888b7325b4SBen Hutchings * for the port without bringing the link down. Safe to call multiple 19898b7325b4SBen Hutchings * times with the NIC in almost any state, but interrupts should be 19908b7325b4SBen Hutchings * enabled. Requires the RTNL lock. 19918b7325b4SBen Hutchings */ 1992874aeea5SJeff Kirsher static void efx_stop_all(struct efx_nic *efx) 1993874aeea5SJeff Kirsher { 1994874aeea5SJeff Kirsher EFX_ASSERT_RESET_SERIALISED(efx); 1995874aeea5SJeff Kirsher 1996874aeea5SJeff Kirsher /* port_enabled can be read safely under the rtnl lock */ 1997874aeea5SJeff Kirsher if (!efx->port_enabled) 1998874aeea5SJeff Kirsher return; 1999874aeea5SJeff Kirsher 2000f8f3b5aeSJon Cooper /* update stats before we go down so we can accurately count 2001f8f3b5aeSJon Cooper * rx_nodesc_drops 2002f8f3b5aeSJon Cooper */ 2003f8f3b5aeSJon Cooper efx->type->pull_stats(efx); 2004f8f3b5aeSJon Cooper spin_lock_bh(&efx->stats_lock); 2005f8f3b5aeSJon Cooper efx->type->update_stats(efx, NULL, NULL); 2006f8f3b5aeSJon Cooper spin_unlock_bh(&efx->stats_lock); 2007874aeea5SJeff Kirsher efx->type->stop_stats(efx); 2008874aeea5SJeff Kirsher efx_stop_port(efx); 2009874aeea5SJeff Kirsher 201029c69a48SBen Hutchings /* Stop the kernel transmit interface. This is only valid if 201129c69a48SBen Hutchings * the device is stopped or detached; otherwise the watchdog 201229c69a48SBen Hutchings * may fire immediately. 201329c69a48SBen Hutchings */ 201429c69a48SBen Hutchings WARN_ON(netif_running(efx->net_dev) && 201529c69a48SBen Hutchings netif_device_present(efx->net_dev)); 20169f2cb71cSBen Hutchings netif_tx_disable(efx->net_dev); 20179f2cb71cSBen Hutchings 20189f2cb71cSBen Hutchings efx_stop_datapath(efx); 2019874aeea5SJeff Kirsher } 2020874aeea5SJeff Kirsher 2021874aeea5SJeff Kirsher static void efx_remove_all(struct efx_nic *efx) 2022874aeea5SJeff Kirsher { 2023874aeea5SJeff Kirsher efx_remove_channels(efx); 20247f967c01SBen Hutchings efx_remove_filters(efx); 20256d8aaaf6SDaniel Pieczko #ifdef CONFIG_SFC_SRIOV 20266d8aaaf6SDaniel Pieczko efx->type->vswitching_remove(efx); 20276d8aaaf6SDaniel Pieczko #endif 2028874aeea5SJeff Kirsher efx_remove_port(efx); 2029874aeea5SJeff Kirsher efx_remove_nic(efx); 2030874aeea5SJeff Kirsher } 2031874aeea5SJeff Kirsher 2032874aeea5SJeff Kirsher /************************************************************************** 2033874aeea5SJeff Kirsher * 2034874aeea5SJeff Kirsher * Interrupt moderation 2035874aeea5SJeff Kirsher * 2036874aeea5SJeff Kirsher **************************************************************************/ 2037539de7c5SBert Kenward unsigned int efx_usecs_to_ticks(struct efx_nic *efx, unsigned int usecs) 2038874aeea5SJeff Kirsher { 2039b548f976SBen Hutchings if (usecs == 0) 2040b548f976SBen Hutchings return 0; 2041539de7c5SBert Kenward if (usecs * 1000 < efx->timer_quantum_ns) 2042874aeea5SJeff Kirsher return 1; /* never round down to 0 */ 2043539de7c5SBert Kenward return usecs * 1000 / efx->timer_quantum_ns; 2044539de7c5SBert Kenward } 2045539de7c5SBert Kenward 2046539de7c5SBert Kenward unsigned int efx_ticks_to_usecs(struct efx_nic *efx, unsigned int ticks) 2047539de7c5SBert Kenward { 2048539de7c5SBert Kenward /* We must round up when converting ticks to microseconds 2049539de7c5SBert Kenward * because we round down when converting the other way. 2050539de7c5SBert Kenward */ 2051539de7c5SBert Kenward return DIV_ROUND_UP(ticks * efx->timer_quantum_ns, 1000); 2052874aeea5SJeff Kirsher } 2053874aeea5SJeff Kirsher 2054874aeea5SJeff Kirsher /* Set interrupt moderation parameters */ 20559e393b30SBen Hutchings int efx_init_irq_moderation(struct efx_nic *efx, unsigned int tx_usecs, 20569e393b30SBen Hutchings unsigned int rx_usecs, bool rx_adaptive, 20579e393b30SBen Hutchings bool rx_may_override_tx) 2058874aeea5SJeff Kirsher { 2059874aeea5SJeff Kirsher struct efx_channel *channel; 2060d95e329aSBert Kenward unsigned int timer_max_us; 2061d95e329aSBert Kenward 2062874aeea5SJeff Kirsher EFX_ASSERT_RESET_SERIALISED(efx); 2063874aeea5SJeff Kirsher 2064d95e329aSBert Kenward timer_max_us = efx->timer_max_ns / 1000; 2065d95e329aSBert Kenward 2066d95e329aSBert Kenward if (tx_usecs > timer_max_us || rx_usecs > timer_max_us) 20679e393b30SBen Hutchings return -EINVAL; 20689e393b30SBen Hutchings 2069539de7c5SBert Kenward if (tx_usecs != rx_usecs && efx->tx_channel_offset == 0 && 20709e393b30SBen Hutchings !rx_may_override_tx) { 20719e393b30SBen Hutchings netif_err(efx, drv, efx->net_dev, "Channels are shared. " 20729e393b30SBen Hutchings "RX and TX IRQ moderation must be equal\n"); 20739e393b30SBen Hutchings return -EINVAL; 20749e393b30SBen Hutchings } 20759e393b30SBen Hutchings 2076874aeea5SJeff Kirsher efx->irq_rx_adaptive = rx_adaptive; 2077539de7c5SBert Kenward efx->irq_rx_moderation_us = rx_usecs; 2078874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) { 2079874aeea5SJeff Kirsher if (efx_channel_has_rx_queue(channel)) 2080539de7c5SBert Kenward channel->irq_moderation_us = rx_usecs; 2081874aeea5SJeff Kirsher else if (efx_channel_has_tx_queues(channel)) 2082539de7c5SBert Kenward channel->irq_moderation_us = tx_usecs; 2083874aeea5SJeff Kirsher } 20849e393b30SBen Hutchings 20859e393b30SBen Hutchings return 0; 2086874aeea5SJeff Kirsher } 2087874aeea5SJeff Kirsher 2088a0c4faf5SBen Hutchings void efx_get_irq_moderation(struct efx_nic *efx, unsigned int *tx_usecs, 2089a0c4faf5SBen Hutchings unsigned int *rx_usecs, bool *rx_adaptive) 2090a0c4faf5SBen Hutchings { 2091a0c4faf5SBen Hutchings *rx_adaptive = efx->irq_rx_adaptive; 2092539de7c5SBert Kenward *rx_usecs = efx->irq_rx_moderation_us; 2093a0c4faf5SBen Hutchings 2094a0c4faf5SBen Hutchings /* If channels are shared between RX and TX, so is IRQ 2095a0c4faf5SBen Hutchings * moderation. Otherwise, IRQ moderation is the same for all 2096a0c4faf5SBen Hutchings * TX channels and is not adaptive. 2097a0c4faf5SBen Hutchings */ 2098539de7c5SBert Kenward if (efx->tx_channel_offset == 0) { 2099a0c4faf5SBen Hutchings *tx_usecs = *rx_usecs; 2100539de7c5SBert Kenward } else { 2101539de7c5SBert Kenward struct efx_channel *tx_channel; 2102539de7c5SBert Kenward 2103539de7c5SBert Kenward tx_channel = efx->channel[efx->tx_channel_offset]; 2104539de7c5SBert Kenward *tx_usecs = tx_channel->irq_moderation_us; 2105539de7c5SBert Kenward } 2106a0c4faf5SBen Hutchings } 2107a0c4faf5SBen Hutchings 2108874aeea5SJeff Kirsher /************************************************************************** 2109874aeea5SJeff Kirsher * 2110874aeea5SJeff Kirsher * Hardware monitor 2111874aeea5SJeff Kirsher * 2112874aeea5SJeff Kirsher **************************************************************************/ 2113874aeea5SJeff Kirsher 2114874aeea5SJeff Kirsher /* Run periodically off the general workqueue */ 2115874aeea5SJeff Kirsher static void efx_monitor(struct work_struct *data) 2116874aeea5SJeff Kirsher { 2117874aeea5SJeff Kirsher struct efx_nic *efx = container_of(data, struct efx_nic, 2118874aeea5SJeff Kirsher monitor_work.work); 2119874aeea5SJeff Kirsher 2120874aeea5SJeff Kirsher netif_vdbg(efx, timer, efx->net_dev, 2121874aeea5SJeff Kirsher "hardware monitor executing on CPU %d\n", 2122874aeea5SJeff Kirsher raw_smp_processor_id()); 2123874aeea5SJeff Kirsher BUG_ON(efx->type->monitor == NULL); 2124874aeea5SJeff Kirsher 2125874aeea5SJeff Kirsher /* If the mac_lock is already held then it is likely a port 2126874aeea5SJeff Kirsher * reconfiguration is already in place, which will likely do 2127874aeea5SJeff Kirsher * most of the work of monitor() anyway. */ 2128874aeea5SJeff Kirsher if (mutex_trylock(&efx->mac_lock)) { 2129874aeea5SJeff Kirsher if (efx->port_enabled) 2130874aeea5SJeff Kirsher efx->type->monitor(efx); 2131874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 2132874aeea5SJeff Kirsher } 2133874aeea5SJeff Kirsher 2134874aeea5SJeff Kirsher queue_delayed_work(efx->workqueue, &efx->monitor_work, 2135874aeea5SJeff Kirsher efx_monitor_interval); 2136874aeea5SJeff Kirsher } 2137874aeea5SJeff Kirsher 2138874aeea5SJeff Kirsher /************************************************************************** 2139874aeea5SJeff Kirsher * 2140874aeea5SJeff Kirsher * ioctls 2141874aeea5SJeff Kirsher * 2142874aeea5SJeff Kirsher *************************************************************************/ 2143874aeea5SJeff Kirsher 2144874aeea5SJeff Kirsher /* Net device ioctl 2145874aeea5SJeff Kirsher * Context: process, rtnl_lock() held. 2146874aeea5SJeff Kirsher */ 2147874aeea5SJeff Kirsher static int efx_ioctl(struct net_device *net_dev, struct ifreq *ifr, int cmd) 2148874aeea5SJeff Kirsher { 2149874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 2150874aeea5SJeff Kirsher struct mii_ioctl_data *data = if_mii(ifr); 2151874aeea5SJeff Kirsher 21527c236c43SStuart Hodgson if (cmd == SIOCSHWTSTAMP) 2153433dc9b3SBen Hutchings return efx_ptp_set_ts_config(efx, ifr); 2154433dc9b3SBen Hutchings if (cmd == SIOCGHWTSTAMP) 2155433dc9b3SBen Hutchings return efx_ptp_get_ts_config(efx, ifr); 21567c236c43SStuart Hodgson 2157874aeea5SJeff Kirsher /* Convert phy_id from older PRTAD/DEVAD format */ 2158874aeea5SJeff Kirsher if ((cmd == SIOCGMIIREG || cmd == SIOCSMIIREG) && 2159874aeea5SJeff Kirsher (data->phy_id & 0xfc00) == 0x0400) 2160874aeea5SJeff Kirsher data->phy_id ^= MDIO_PHY_ID_C45 | 0x0400; 2161874aeea5SJeff Kirsher 2162874aeea5SJeff Kirsher return mdio_mii_ioctl(&efx->mdio, data, cmd); 2163874aeea5SJeff Kirsher } 2164874aeea5SJeff Kirsher 2165874aeea5SJeff Kirsher /************************************************************************** 2166874aeea5SJeff Kirsher * 2167874aeea5SJeff Kirsher * NAPI interface 2168874aeea5SJeff Kirsher * 2169874aeea5SJeff Kirsher **************************************************************************/ 2170874aeea5SJeff Kirsher 21717f967c01SBen Hutchings static void efx_init_napi_channel(struct efx_channel *channel) 2172874aeea5SJeff Kirsher { 21737f967c01SBen Hutchings struct efx_nic *efx = channel->efx; 2174874aeea5SJeff Kirsher 2175874aeea5SJeff Kirsher channel->napi_dev = efx->net_dev; 2176874aeea5SJeff Kirsher netif_napi_add(channel->napi_dev, &channel->napi_str, 2177874aeea5SJeff Kirsher efx_poll, napi_weight); 2178874aeea5SJeff Kirsher } 21797f967c01SBen Hutchings 21807f967c01SBen Hutchings static void efx_init_napi(struct efx_nic *efx) 21817f967c01SBen Hutchings { 21827f967c01SBen Hutchings struct efx_channel *channel; 21837f967c01SBen Hutchings 21847f967c01SBen Hutchings efx_for_each_channel(channel, efx) 21857f967c01SBen Hutchings efx_init_napi_channel(channel); 2186874aeea5SJeff Kirsher } 2187874aeea5SJeff Kirsher 2188874aeea5SJeff Kirsher static void efx_fini_napi_channel(struct efx_channel *channel) 2189874aeea5SJeff Kirsher { 2190973334a1SEric Dumazet if (channel->napi_dev) 2191874aeea5SJeff Kirsher netif_napi_del(&channel->napi_str); 2192973334a1SEric Dumazet 2193874aeea5SJeff Kirsher channel->napi_dev = NULL; 2194874aeea5SJeff Kirsher } 2195874aeea5SJeff Kirsher 2196874aeea5SJeff Kirsher static void efx_fini_napi(struct efx_nic *efx) 2197874aeea5SJeff Kirsher { 2198874aeea5SJeff Kirsher struct efx_channel *channel; 2199874aeea5SJeff Kirsher 2200874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) 2201874aeea5SJeff Kirsher efx_fini_napi_channel(channel); 2202874aeea5SJeff Kirsher } 2203874aeea5SJeff Kirsher 2204874aeea5SJeff Kirsher /************************************************************************** 2205874aeea5SJeff Kirsher * 2206874aeea5SJeff Kirsher * Kernel netpoll interface 2207874aeea5SJeff Kirsher * 2208874aeea5SJeff Kirsher *************************************************************************/ 2209874aeea5SJeff Kirsher 2210874aeea5SJeff Kirsher #ifdef CONFIG_NET_POLL_CONTROLLER 2211874aeea5SJeff Kirsher 2212874aeea5SJeff Kirsher /* Although in the common case interrupts will be disabled, this is not 2213874aeea5SJeff Kirsher * guaranteed. However, all our work happens inside the NAPI callback, 2214874aeea5SJeff Kirsher * so no locking is required. 2215874aeea5SJeff Kirsher */ 2216874aeea5SJeff Kirsher static void efx_netpoll(struct net_device *net_dev) 2217874aeea5SJeff Kirsher { 2218874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 2219874aeea5SJeff Kirsher struct efx_channel *channel; 2220874aeea5SJeff Kirsher 2221874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) 2222874aeea5SJeff Kirsher efx_schedule_channel(channel); 2223874aeea5SJeff Kirsher } 2224874aeea5SJeff Kirsher 2225874aeea5SJeff Kirsher #endif 2226874aeea5SJeff Kirsher 2227874aeea5SJeff Kirsher /************************************************************************** 2228874aeea5SJeff Kirsher * 2229874aeea5SJeff Kirsher * Kernel net device interface 2230874aeea5SJeff Kirsher * 2231874aeea5SJeff Kirsher *************************************************************************/ 2232874aeea5SJeff Kirsher 2233874aeea5SJeff Kirsher /* Context: process, rtnl_lock() held. */ 2234e340be92SShradha Shah int efx_net_open(struct net_device *net_dev) 2235874aeea5SJeff Kirsher { 2236874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 22378b7325b4SBen Hutchings int rc; 22388b7325b4SBen Hutchings 2239874aeea5SJeff Kirsher netif_dbg(efx, ifup, efx->net_dev, "opening device on CPU %d\n", 2240874aeea5SJeff Kirsher raw_smp_processor_id()); 2241874aeea5SJeff Kirsher 22428b7325b4SBen Hutchings rc = efx_check_disabled(efx); 22438b7325b4SBen Hutchings if (rc) 22448b7325b4SBen Hutchings return rc; 2245874aeea5SJeff Kirsher if (efx->phy_mode & PHY_MODE_SPECIAL) 2246874aeea5SJeff Kirsher return -EBUSY; 2247874aeea5SJeff Kirsher if (efx_mcdi_poll_reboot(efx) && efx_reset(efx, RESET_TYPE_ALL)) 2248874aeea5SJeff Kirsher return -EIO; 2249874aeea5SJeff Kirsher 2250874aeea5SJeff Kirsher /* Notify the kernel of the link state polled during driver load, 2251874aeea5SJeff Kirsher * before the monitor starts running */ 2252874aeea5SJeff Kirsher efx_link_status_changed(efx); 2253874aeea5SJeff Kirsher 2254874aeea5SJeff Kirsher efx_start_all(efx); 22559c568fd8SPeter Dunning if (efx->state == STATE_DISABLED || efx->reset_pending) 22569c568fd8SPeter Dunning netif_device_detach(efx->net_dev); 2257dd40781eSBen Hutchings efx_selftest_async_start(efx); 2258874aeea5SJeff Kirsher return 0; 2259874aeea5SJeff Kirsher } 2260874aeea5SJeff Kirsher 2261874aeea5SJeff Kirsher /* Context: process, rtnl_lock() held. 2262874aeea5SJeff Kirsher * Note that the kernel will ignore our return code; this method 2263874aeea5SJeff Kirsher * should really be a void. 2264874aeea5SJeff Kirsher */ 2265e340be92SShradha Shah int efx_net_stop(struct net_device *net_dev) 2266874aeea5SJeff Kirsher { 2267874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 2268874aeea5SJeff Kirsher 2269874aeea5SJeff Kirsher netif_dbg(efx, ifdown, efx->net_dev, "closing on CPU %d\n", 2270874aeea5SJeff Kirsher raw_smp_processor_id()); 2271874aeea5SJeff Kirsher 2272874aeea5SJeff Kirsher /* Stop the device and flush all the channels */ 2273874aeea5SJeff Kirsher efx_stop_all(efx); 2274874aeea5SJeff Kirsher 2275874aeea5SJeff Kirsher return 0; 2276874aeea5SJeff Kirsher } 2277874aeea5SJeff Kirsher 2278874aeea5SJeff Kirsher /* Context: process, dev_base_lock or RTNL held, non-blocking. */ 2279bc1f4470Sstephen hemminger static void efx_net_stats(struct net_device *net_dev, 22802aa9ef11SBen Hutchings struct rtnl_link_stats64 *stats) 2281874aeea5SJeff Kirsher { 2282874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 2283874aeea5SJeff Kirsher 2284874aeea5SJeff Kirsher spin_lock_bh(&efx->stats_lock); 2285cd0ecc9aSBen Hutchings efx->type->update_stats(efx, NULL, stats); 22861cb34522SBen Hutchings spin_unlock_bh(&efx->stats_lock); 2287874aeea5SJeff Kirsher } 2288874aeea5SJeff Kirsher 2289874aeea5SJeff Kirsher /* Context: netif_tx_lock held, BHs disabled. */ 2290874aeea5SJeff Kirsher static void efx_watchdog(struct net_device *net_dev) 2291874aeea5SJeff Kirsher { 2292874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 2293874aeea5SJeff Kirsher 2294874aeea5SJeff Kirsher netif_err(efx, tx_err, efx->net_dev, 2295874aeea5SJeff Kirsher "TX stuck with port_enabled=%d: resetting channels\n", 2296874aeea5SJeff Kirsher efx->port_enabled); 2297874aeea5SJeff Kirsher 2298874aeea5SJeff Kirsher efx_schedule_reset(efx, RESET_TYPE_TX_WATCHDOG); 2299874aeea5SJeff Kirsher } 2300874aeea5SJeff Kirsher 2301874aeea5SJeff Kirsher 2302874aeea5SJeff Kirsher /* Context: process, rtnl_lock() held. */ 2303874aeea5SJeff Kirsher static int efx_change_mtu(struct net_device *net_dev, int new_mtu) 2304874aeea5SJeff Kirsher { 2305874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 23068b7325b4SBen Hutchings int rc; 2307874aeea5SJeff Kirsher 23088b7325b4SBen Hutchings rc = efx_check_disabled(efx); 23098b7325b4SBen Hutchings if (rc) 23108b7325b4SBen Hutchings return rc; 2311874aeea5SJeff Kirsher 2312874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "changing MTU to %d\n", new_mtu); 2313874aeea5SJeff Kirsher 231429c69a48SBen Hutchings efx_device_detach_sync(efx); 231529c69a48SBen Hutchings efx_stop_all(efx); 231629c69a48SBen Hutchings 2317874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 2318874aeea5SJeff Kirsher net_dev->mtu = new_mtu; 23190d322413SEdward Cree efx_mac_reconfigure(efx); 2320874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 2321874aeea5SJeff Kirsher 2322874aeea5SJeff Kirsher efx_start_all(efx); 23239c568fd8SPeter Dunning efx_device_attach_if_not_resetting(efx); 23246c8eef4aSBen Hutchings return 0; 2325874aeea5SJeff Kirsher } 2326874aeea5SJeff Kirsher 2327874aeea5SJeff Kirsher static int efx_set_mac_address(struct net_device *net_dev, void *data) 2328874aeea5SJeff Kirsher { 2329874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 2330874aeea5SJeff Kirsher struct sockaddr *addr = data; 2331e0b3ae30SBen Hutchings u8 *new_addr = addr->sa_data; 2332cfc77c2fSShradha Shah u8 old_addr[6]; 2333cfc77c2fSShradha Shah int rc; 2334874aeea5SJeff Kirsher 2335874aeea5SJeff Kirsher if (!is_valid_ether_addr(new_addr)) { 2336874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, 2337874aeea5SJeff Kirsher "invalid ethernet MAC address requested: %pM\n", 2338874aeea5SJeff Kirsher new_addr); 2339504f9b5aSDanny Kukawka return -EADDRNOTAVAIL; 2340874aeea5SJeff Kirsher } 2341874aeea5SJeff Kirsher 2342cfc77c2fSShradha Shah /* save old address */ 2343cfc77c2fSShradha Shah ether_addr_copy(old_addr, net_dev->dev_addr); 2344cd84ff4dSEdward Cree ether_addr_copy(net_dev->dev_addr, new_addr); 2345910c8789SShradha Shah if (efx->type->set_mac_address) { 2346910c8789SShradha Shah rc = efx->type->set_mac_address(efx); 2347cfc77c2fSShradha Shah if (rc) { 2348cfc77c2fSShradha Shah ether_addr_copy(net_dev->dev_addr, old_addr); 2349cfc77c2fSShradha Shah return rc; 2350cfc77c2fSShradha Shah } 2351cfc77c2fSShradha Shah } 2352874aeea5SJeff Kirsher 2353874aeea5SJeff Kirsher /* Reconfigure the MAC */ 2354874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 23550d322413SEdward Cree efx_mac_reconfigure(efx); 2356874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 2357874aeea5SJeff Kirsher 2358874aeea5SJeff Kirsher return 0; 2359874aeea5SJeff Kirsher } 2360874aeea5SJeff Kirsher 2361874aeea5SJeff Kirsher /* Context: netif_addr_lock held, BHs disabled. */ 23620fca8c97SBen Hutchings static void efx_set_rx_mode(struct net_device *net_dev) 2363874aeea5SJeff Kirsher { 2364874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 2365874aeea5SJeff Kirsher 2366874aeea5SJeff Kirsher if (efx->port_enabled) 2367874aeea5SJeff Kirsher queue_work(efx->workqueue, &efx->mac_work); 2368874aeea5SJeff Kirsher /* Otherwise efx_start_port() will do this */ 2369874aeea5SJeff Kirsher } 2370874aeea5SJeff Kirsher 2371c8f44affSMichał Mirosław static int efx_set_features(struct net_device *net_dev, netdev_features_t data) 2372874aeea5SJeff Kirsher { 2373874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 23744a53ea8aSAndrew Rybchenko int rc; 2375874aeea5SJeff Kirsher 2376874aeea5SJeff Kirsher /* If disabling RX n-tuple filtering, clear existing filters */ 23774a53ea8aSAndrew Rybchenko if (net_dev->features & ~data & NETIF_F_NTUPLE) { 23784a53ea8aSAndrew Rybchenko rc = efx->type->filter_clear_rx(efx, EFX_FILTER_PRI_MANUAL); 23794a53ea8aSAndrew Rybchenko if (rc) 23804a53ea8aSAndrew Rybchenko return rc; 23814a53ea8aSAndrew Rybchenko } 23824a53ea8aSAndrew Rybchenko 23836978729fSEdward Cree /* If Rx VLAN filter is changed, update filters via mac_reconfigure. 23846978729fSEdward Cree * If rx-fcs is changed, mac_reconfigure updates that too. 23856978729fSEdward Cree */ 23866978729fSEdward Cree if ((net_dev->features ^ data) & (NETIF_F_HW_VLAN_CTAG_FILTER | 23876978729fSEdward Cree NETIF_F_RXFCS)) { 23884a53ea8aSAndrew Rybchenko /* efx_set_rx_mode() will schedule MAC work to update filters 23894a53ea8aSAndrew Rybchenko * when a new features are finally set in net_dev. 23904a53ea8aSAndrew Rybchenko */ 23914a53ea8aSAndrew Rybchenko efx_set_rx_mode(net_dev); 23924a53ea8aSAndrew Rybchenko } 2393874aeea5SJeff Kirsher 2394874aeea5SJeff Kirsher return 0; 2395874aeea5SJeff Kirsher } 2396874aeea5SJeff Kirsher 2397b40296fcSWei Yongjun static int efx_get_phys_port_id(struct net_device *net_dev, 239808a7b29bSBert Kenward struct netdev_phys_item_id *ppid) 239908a7b29bSBert Kenward { 240008a7b29bSBert Kenward struct efx_nic *efx = netdev_priv(net_dev); 240108a7b29bSBert Kenward 240208a7b29bSBert Kenward if (efx->type->get_phys_port_id) 240308a7b29bSBert Kenward return efx->type->get_phys_port_id(efx, ppid); 240408a7b29bSBert Kenward else 240508a7b29bSBert Kenward return -EOPNOTSUPP; 240608a7b29bSBert Kenward } 240708a7b29bSBert Kenward 2408ac019f08SBert Kenward static int efx_get_phys_port_name(struct net_device *net_dev, 2409ac019f08SBert Kenward char *name, size_t len) 2410ac019f08SBert Kenward { 2411ac019f08SBert Kenward struct efx_nic *efx = netdev_priv(net_dev); 2412ac019f08SBert Kenward 2413ac019f08SBert Kenward if (snprintf(name, len, "p%u", efx->port_num) >= len) 2414ac019f08SBert Kenward return -EINVAL; 2415ac019f08SBert Kenward return 0; 2416ac019f08SBert Kenward } 2417ac019f08SBert Kenward 24184a53ea8aSAndrew Rybchenko static int efx_vlan_rx_add_vid(struct net_device *net_dev, __be16 proto, u16 vid) 24194a53ea8aSAndrew Rybchenko { 24204a53ea8aSAndrew Rybchenko struct efx_nic *efx = netdev_priv(net_dev); 24214a53ea8aSAndrew Rybchenko 24224a53ea8aSAndrew Rybchenko if (efx->type->vlan_rx_add_vid) 24234a53ea8aSAndrew Rybchenko return efx->type->vlan_rx_add_vid(efx, proto, vid); 24244a53ea8aSAndrew Rybchenko else 24254a53ea8aSAndrew Rybchenko return -EOPNOTSUPP; 24264a53ea8aSAndrew Rybchenko } 24274a53ea8aSAndrew Rybchenko 24284a53ea8aSAndrew Rybchenko static int efx_vlan_rx_kill_vid(struct net_device *net_dev, __be16 proto, u16 vid) 24294a53ea8aSAndrew Rybchenko { 24304a53ea8aSAndrew Rybchenko struct efx_nic *efx = netdev_priv(net_dev); 24314a53ea8aSAndrew Rybchenko 24324a53ea8aSAndrew Rybchenko if (efx->type->vlan_rx_kill_vid) 24334a53ea8aSAndrew Rybchenko return efx->type->vlan_rx_kill_vid(efx, proto, vid); 24344a53ea8aSAndrew Rybchenko else 24354a53ea8aSAndrew Rybchenko return -EOPNOTSUPP; 24364a53ea8aSAndrew Rybchenko } 24374a53ea8aSAndrew Rybchenko 2438e5fbd977SJon Cooper static int efx_udp_tunnel_type_map(enum udp_parsable_tunnel_type in) 2439e5fbd977SJon Cooper { 2440e5fbd977SJon Cooper switch (in) { 2441e5fbd977SJon Cooper case UDP_TUNNEL_TYPE_VXLAN: 2442e5fbd977SJon Cooper return TUNNEL_ENCAP_UDP_PORT_ENTRY_VXLAN; 2443e5fbd977SJon Cooper case UDP_TUNNEL_TYPE_GENEVE: 2444e5fbd977SJon Cooper return TUNNEL_ENCAP_UDP_PORT_ENTRY_GENEVE; 2445e5fbd977SJon Cooper default: 2446e5fbd977SJon Cooper return -1; 2447e5fbd977SJon Cooper } 2448e5fbd977SJon Cooper } 2449e5fbd977SJon Cooper 2450e5fbd977SJon Cooper static void efx_udp_tunnel_add(struct net_device *dev, struct udp_tunnel_info *ti) 2451e5fbd977SJon Cooper { 2452e5fbd977SJon Cooper struct efx_nic *efx = netdev_priv(dev); 2453e5fbd977SJon Cooper struct efx_udp_tunnel tnl; 2454e5fbd977SJon Cooper int efx_tunnel_type; 2455e5fbd977SJon Cooper 2456e5fbd977SJon Cooper efx_tunnel_type = efx_udp_tunnel_type_map(ti->type); 2457e5fbd977SJon Cooper if (efx_tunnel_type < 0) 2458e5fbd977SJon Cooper return; 2459e5fbd977SJon Cooper 2460e5fbd977SJon Cooper tnl.type = (u16)efx_tunnel_type; 2461e5fbd977SJon Cooper tnl.port = ti->port; 2462e5fbd977SJon Cooper 2463e5fbd977SJon Cooper if (efx->type->udp_tnl_add_port) 2464e5fbd977SJon Cooper (void)efx->type->udp_tnl_add_port(efx, tnl); 2465e5fbd977SJon Cooper } 2466e5fbd977SJon Cooper 2467e5fbd977SJon Cooper static void efx_udp_tunnel_del(struct net_device *dev, struct udp_tunnel_info *ti) 2468e5fbd977SJon Cooper { 2469e5fbd977SJon Cooper struct efx_nic *efx = netdev_priv(dev); 2470e5fbd977SJon Cooper struct efx_udp_tunnel tnl; 2471e5fbd977SJon Cooper int efx_tunnel_type; 2472e5fbd977SJon Cooper 2473e5fbd977SJon Cooper efx_tunnel_type = efx_udp_tunnel_type_map(ti->type); 2474e5fbd977SJon Cooper if (efx_tunnel_type < 0) 2475e5fbd977SJon Cooper return; 2476e5fbd977SJon Cooper 2477e5fbd977SJon Cooper tnl.type = (u16)efx_tunnel_type; 2478e5fbd977SJon Cooper tnl.port = ti->port; 2479e5fbd977SJon Cooper 2480c04ca616SDan Carpenter if (efx->type->udp_tnl_del_port) 2481e5fbd977SJon Cooper (void)efx->type->udp_tnl_del_port(efx, tnl); 2482e5fbd977SJon Cooper } 2483e5fbd977SJon Cooper 24847fa8d547SShradha Shah static const struct net_device_ops efx_netdev_ops = { 2485874aeea5SJeff Kirsher .ndo_open = efx_net_open, 2486874aeea5SJeff Kirsher .ndo_stop = efx_net_stop, 2487874aeea5SJeff Kirsher .ndo_get_stats64 = efx_net_stats, 2488874aeea5SJeff Kirsher .ndo_tx_timeout = efx_watchdog, 2489874aeea5SJeff Kirsher .ndo_start_xmit = efx_hard_start_xmit, 2490874aeea5SJeff Kirsher .ndo_validate_addr = eth_validate_addr, 2491874aeea5SJeff Kirsher .ndo_do_ioctl = efx_ioctl, 2492874aeea5SJeff Kirsher .ndo_change_mtu = efx_change_mtu, 2493874aeea5SJeff Kirsher .ndo_set_mac_address = efx_set_mac_address, 24940fca8c97SBen Hutchings .ndo_set_rx_mode = efx_set_rx_mode, 2495874aeea5SJeff Kirsher .ndo_set_features = efx_set_features, 24964a53ea8aSAndrew Rybchenko .ndo_vlan_rx_add_vid = efx_vlan_rx_add_vid, 24974a53ea8aSAndrew Rybchenko .ndo_vlan_rx_kill_vid = efx_vlan_rx_kill_vid, 2498cd2d5b52SBen Hutchings #ifdef CONFIG_SFC_SRIOV 24997fa8d547SShradha Shah .ndo_set_vf_mac = efx_sriov_set_vf_mac, 25007fa8d547SShradha Shah .ndo_set_vf_vlan = efx_sriov_set_vf_vlan, 25017fa8d547SShradha Shah .ndo_set_vf_spoofchk = efx_sriov_set_vf_spoofchk, 25027fa8d547SShradha Shah .ndo_get_vf_config = efx_sriov_get_vf_config, 25034392dc69SEdward Cree .ndo_set_vf_link_state = efx_sriov_set_vf_link_state, 2504cd2d5b52SBen Hutchings #endif 250508a7b29bSBert Kenward .ndo_get_phys_port_id = efx_get_phys_port_id, 2506ac019f08SBert Kenward .ndo_get_phys_port_name = efx_get_phys_port_name, 2507874aeea5SJeff Kirsher #ifdef CONFIG_NET_POLL_CONTROLLER 2508874aeea5SJeff Kirsher .ndo_poll_controller = efx_netpoll, 2509874aeea5SJeff Kirsher #endif 2510874aeea5SJeff Kirsher .ndo_setup_tc = efx_setup_tc, 2511874aeea5SJeff Kirsher #ifdef CONFIG_RFS_ACCEL 2512874aeea5SJeff Kirsher .ndo_rx_flow_steer = efx_filter_rfs, 2513874aeea5SJeff Kirsher #endif 2514e5fbd977SJon Cooper .ndo_udp_tunnel_add = efx_udp_tunnel_add, 2515e5fbd977SJon Cooper .ndo_udp_tunnel_del = efx_udp_tunnel_del, 2516874aeea5SJeff Kirsher }; 2517874aeea5SJeff Kirsher 2518874aeea5SJeff Kirsher static void efx_update_name(struct efx_nic *efx) 2519874aeea5SJeff Kirsher { 2520874aeea5SJeff Kirsher strcpy(efx->name, efx->net_dev->name); 2521874aeea5SJeff Kirsher efx_mtd_rename(efx); 2522874aeea5SJeff Kirsher efx_set_channel_names(efx); 2523874aeea5SJeff Kirsher } 2524874aeea5SJeff Kirsher 2525874aeea5SJeff Kirsher static int efx_netdev_event(struct notifier_block *this, 2526874aeea5SJeff Kirsher unsigned long event, void *ptr) 2527874aeea5SJeff Kirsher { 2528351638e7SJiri Pirko struct net_device *net_dev = netdev_notifier_info_to_dev(ptr); 2529874aeea5SJeff Kirsher 25307fa8d547SShradha Shah if ((net_dev->netdev_ops == &efx_netdev_ops) && 2531874aeea5SJeff Kirsher event == NETDEV_CHANGENAME) 2532874aeea5SJeff Kirsher efx_update_name(netdev_priv(net_dev)); 2533874aeea5SJeff Kirsher 2534874aeea5SJeff Kirsher return NOTIFY_DONE; 2535874aeea5SJeff Kirsher } 2536874aeea5SJeff Kirsher 2537874aeea5SJeff Kirsher static struct notifier_block efx_netdev_notifier = { 2538874aeea5SJeff Kirsher .notifier_call = efx_netdev_event, 2539874aeea5SJeff Kirsher }; 2540874aeea5SJeff Kirsher 2541874aeea5SJeff Kirsher static ssize_t 2542874aeea5SJeff Kirsher show_phy_type(struct device *dev, struct device_attribute *attr, char *buf) 2543874aeea5SJeff Kirsher { 2544874aeea5SJeff Kirsher struct efx_nic *efx = pci_get_drvdata(to_pci_dev(dev)); 2545874aeea5SJeff Kirsher return sprintf(buf, "%d\n", efx->phy_type); 2546874aeea5SJeff Kirsher } 2547776fbcc9SBen Hutchings static DEVICE_ATTR(phy_type, 0444, show_phy_type, NULL); 2548874aeea5SJeff Kirsher 2549e7fef9b4SEdward Cree #ifdef CONFIG_SFC_MCDI_LOGGING 2550e7fef9b4SEdward Cree static ssize_t show_mcdi_log(struct device *dev, struct device_attribute *attr, 2551e7fef9b4SEdward Cree char *buf) 2552e7fef9b4SEdward Cree { 2553e7fef9b4SEdward Cree struct efx_nic *efx = pci_get_drvdata(to_pci_dev(dev)); 2554e7fef9b4SEdward Cree struct efx_mcdi_iface *mcdi = efx_mcdi(efx); 2555e7fef9b4SEdward Cree 2556e7fef9b4SEdward Cree return scnprintf(buf, PAGE_SIZE, "%d\n", mcdi->logging_enabled); 2557e7fef9b4SEdward Cree } 2558e7fef9b4SEdward Cree static ssize_t set_mcdi_log(struct device *dev, struct device_attribute *attr, 2559e7fef9b4SEdward Cree const char *buf, size_t count) 2560e7fef9b4SEdward Cree { 2561e7fef9b4SEdward Cree struct efx_nic *efx = pci_get_drvdata(to_pci_dev(dev)); 2562e7fef9b4SEdward Cree struct efx_mcdi_iface *mcdi = efx_mcdi(efx); 2563e7fef9b4SEdward Cree bool enable = count > 0 && *buf != '0'; 2564e7fef9b4SEdward Cree 2565e7fef9b4SEdward Cree mcdi->logging_enabled = enable; 2566e7fef9b4SEdward Cree return count; 2567e7fef9b4SEdward Cree } 2568e7fef9b4SEdward Cree static DEVICE_ATTR(mcdi_logging, 0644, show_mcdi_log, set_mcdi_log); 2569e7fef9b4SEdward Cree #endif 2570e7fef9b4SEdward Cree 2571874aeea5SJeff Kirsher static int efx_register_netdev(struct efx_nic *efx) 2572874aeea5SJeff Kirsher { 2573874aeea5SJeff Kirsher struct net_device *net_dev = efx->net_dev; 2574874aeea5SJeff Kirsher struct efx_channel *channel; 2575874aeea5SJeff Kirsher int rc; 2576874aeea5SJeff Kirsher 2577874aeea5SJeff Kirsher net_dev->watchdog_timeo = 5 * HZ; 2578874aeea5SJeff Kirsher net_dev->irq = efx->pci_dev->irq; 25797fa8d547SShradha Shah net_dev->netdev_ops = &efx_netdev_ops; 25807fa8d547SShradha Shah if (efx_nic_rev(efx) >= EFX_REV_HUNT_A0) 25818127d661SBen Hutchings net_dev->priv_flags |= IFF_UNICAST_FLT; 25827ad24ea4SWilfried Klaebe net_dev->ethtool_ops = &efx_ethtool_ops; 25837e6d06f0SBen Hutchings net_dev->gso_max_segs = EFX_TSO_MAX_SEGS; 2584cd94e519SBert Kenward net_dev->min_mtu = EFX_MIN_MTU; 2585cd94e519SBert Kenward net_dev->max_mtu = EFX_MAX_MTU; 2586874aeea5SJeff Kirsher 2587874aeea5SJeff Kirsher rtnl_lock(); 2588874aeea5SJeff Kirsher 25897153f623SBen Hutchings /* Enable resets to be scheduled and check whether any were 25907153f623SBen Hutchings * already requested. If so, the NIC is probably hosed so we 25917153f623SBen Hutchings * abort. 25927153f623SBen Hutchings */ 25937153f623SBen Hutchings efx->state = STATE_READY; 25947153f623SBen Hutchings smp_mb(); /* ensure we change state before checking reset_pending */ 25957153f623SBen Hutchings if (efx->reset_pending) { 25967153f623SBen Hutchings netif_err(efx, probe, efx->net_dev, 25977153f623SBen Hutchings "aborting probe due to scheduled reset\n"); 25987153f623SBen Hutchings rc = -EIO; 25997153f623SBen Hutchings goto fail_locked; 26007153f623SBen Hutchings } 26017153f623SBen Hutchings 2602874aeea5SJeff Kirsher rc = dev_alloc_name(net_dev, net_dev->name); 2603874aeea5SJeff Kirsher if (rc < 0) 2604874aeea5SJeff Kirsher goto fail_locked; 2605874aeea5SJeff Kirsher efx_update_name(efx); 2606874aeea5SJeff Kirsher 26078f8b3d51SBen Hutchings /* Always start with carrier off; PHY events will detect the link */ 26088f8b3d51SBen Hutchings netif_carrier_off(net_dev); 26098f8b3d51SBen Hutchings 2610874aeea5SJeff Kirsher rc = register_netdevice(net_dev); 2611874aeea5SJeff Kirsher if (rc) 2612874aeea5SJeff Kirsher goto fail_locked; 2613874aeea5SJeff Kirsher 2614874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) { 2615874aeea5SJeff Kirsher struct efx_tx_queue *tx_queue; 2616874aeea5SJeff Kirsher efx_for_each_channel_tx_queue(tx_queue, channel) 2617874aeea5SJeff Kirsher efx_init_tx_queue_core_txq(tx_queue); 2618874aeea5SJeff Kirsher } 2619874aeea5SJeff Kirsher 26200bcf4a64SBen Hutchings efx_associate(efx); 26210bcf4a64SBen Hutchings 2622874aeea5SJeff Kirsher rtnl_unlock(); 2623874aeea5SJeff Kirsher 2624874aeea5SJeff Kirsher rc = device_create_file(&efx->pci_dev->dev, &dev_attr_phy_type); 2625874aeea5SJeff Kirsher if (rc) { 2626874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, 2627874aeea5SJeff Kirsher "failed to init net dev attributes\n"); 2628874aeea5SJeff Kirsher goto fail_registered; 2629874aeea5SJeff Kirsher } 2630e7fef9b4SEdward Cree #ifdef CONFIG_SFC_MCDI_LOGGING 2631e7fef9b4SEdward Cree rc = device_create_file(&efx->pci_dev->dev, &dev_attr_mcdi_logging); 2632e7fef9b4SEdward Cree if (rc) { 2633e7fef9b4SEdward Cree netif_err(efx, drv, efx->net_dev, 2634e7fef9b4SEdward Cree "failed to init net dev attributes\n"); 2635e7fef9b4SEdward Cree goto fail_attr_mcdi_logging; 2636e7fef9b4SEdward Cree } 2637e7fef9b4SEdward Cree #endif 2638874aeea5SJeff Kirsher 2639874aeea5SJeff Kirsher return 0; 2640874aeea5SJeff Kirsher 2641e7fef9b4SEdward Cree #ifdef CONFIG_SFC_MCDI_LOGGING 2642e7fef9b4SEdward Cree fail_attr_mcdi_logging: 2643e7fef9b4SEdward Cree device_remove_file(&efx->pci_dev->dev, &dev_attr_phy_type); 2644e7fef9b4SEdward Cree #endif 26457153f623SBen Hutchings fail_registered: 26467153f623SBen Hutchings rtnl_lock(); 26470bcf4a64SBen Hutchings efx_dissociate(efx); 26487153f623SBen Hutchings unregister_netdevice(net_dev); 2649874aeea5SJeff Kirsher fail_locked: 26507153f623SBen Hutchings efx->state = STATE_UNINIT; 2651874aeea5SJeff Kirsher rtnl_unlock(); 2652874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, "could not register net dev\n"); 2653874aeea5SJeff Kirsher return rc; 2654874aeea5SJeff Kirsher } 2655874aeea5SJeff Kirsher 2656874aeea5SJeff Kirsher static void efx_unregister_netdev(struct efx_nic *efx) 2657874aeea5SJeff Kirsher { 2658874aeea5SJeff Kirsher if (!efx->net_dev) 2659874aeea5SJeff Kirsher return; 2660874aeea5SJeff Kirsher 2661874aeea5SJeff Kirsher BUG_ON(netdev_priv(efx->net_dev) != efx); 2662874aeea5SJeff Kirsher 2663e7fef9b4SEdward Cree if (efx_dev_registered(efx)) { 2664874aeea5SJeff Kirsher strlcpy(efx->name, pci_name(efx->pci_dev), sizeof(efx->name)); 2665e7fef9b4SEdward Cree #ifdef CONFIG_SFC_MCDI_LOGGING 2666e7fef9b4SEdward Cree device_remove_file(&efx->pci_dev->dev, &dev_attr_mcdi_logging); 2667e7fef9b4SEdward Cree #endif 2668874aeea5SJeff Kirsher device_remove_file(&efx->pci_dev->dev, &dev_attr_phy_type); 2669e7fef9b4SEdward Cree unregister_netdev(efx->net_dev); 2670e7fef9b4SEdward Cree } 2671874aeea5SJeff Kirsher } 2672874aeea5SJeff Kirsher 2673874aeea5SJeff Kirsher /************************************************************************** 2674874aeea5SJeff Kirsher * 2675874aeea5SJeff Kirsher * Device reset and suspend 2676874aeea5SJeff Kirsher * 2677874aeea5SJeff Kirsher **************************************************************************/ 2678874aeea5SJeff Kirsher 2679874aeea5SJeff Kirsher /* Tears down the entire software state and most of the hardware state 2680874aeea5SJeff Kirsher * before reset. */ 2681874aeea5SJeff Kirsher void efx_reset_down(struct efx_nic *efx, enum reset_type method) 2682874aeea5SJeff Kirsher { 2683874aeea5SJeff Kirsher EFX_ASSERT_RESET_SERIALISED(efx); 2684874aeea5SJeff Kirsher 2685e283546cSEdward Cree if (method == RESET_TYPE_MCDI_TIMEOUT) 2686e283546cSEdward Cree efx->type->prepare_flr(efx); 2687e283546cSEdward Cree 2688874aeea5SJeff Kirsher efx_stop_all(efx); 2689d8291187SBen Hutchings efx_disable_interrupts(efx); 26905642ceefSBen Hutchings 26915642ceefSBen Hutchings mutex_lock(&efx->mac_lock); 2692e0a65e3cSEdward Cree mutex_lock(&efx->rss_lock); 2693087e9025SJon Cooper if (efx->port_initialized && method != RESET_TYPE_INVISIBLE && 2694087e9025SJon Cooper method != RESET_TYPE_DATAPATH) 2695874aeea5SJeff Kirsher efx->phy_op->fini(efx); 2696874aeea5SJeff Kirsher efx->type->fini(efx); 2697874aeea5SJeff Kirsher } 2698874aeea5SJeff Kirsher 2699874aeea5SJeff Kirsher /* This function will always ensure that the locks acquired in 2700874aeea5SJeff Kirsher * efx_reset_down() are released. A failure return code indicates 2701874aeea5SJeff Kirsher * that we were unable to reinitialise the hardware, and the 2702874aeea5SJeff Kirsher * driver should be disabled. If ok is false, then the rx and tx 2703874aeea5SJeff Kirsher * engines are not restarted, pending a RESET_DISABLE. */ 2704874aeea5SJeff Kirsher int efx_reset_up(struct efx_nic *efx, enum reset_type method, bool ok) 2705874aeea5SJeff Kirsher { 2706874aeea5SJeff Kirsher int rc; 2707874aeea5SJeff Kirsher 2708874aeea5SJeff Kirsher EFX_ASSERT_RESET_SERIALISED(efx); 2709874aeea5SJeff Kirsher 2710e283546cSEdward Cree if (method == RESET_TYPE_MCDI_TIMEOUT) 2711e283546cSEdward Cree efx->type->finish_flr(efx); 2712e283546cSEdward Cree 2713e283546cSEdward Cree /* Ensure that SRAM is initialised even if we're disabling the device */ 2714874aeea5SJeff Kirsher rc = efx->type->init(efx); 2715874aeea5SJeff Kirsher if (rc) { 2716874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, "failed to initialise NIC\n"); 2717874aeea5SJeff Kirsher goto fail; 2718874aeea5SJeff Kirsher } 2719874aeea5SJeff Kirsher 2720874aeea5SJeff Kirsher if (!ok) 2721874aeea5SJeff Kirsher goto fail; 2722874aeea5SJeff Kirsher 2723087e9025SJon Cooper if (efx->port_initialized && method != RESET_TYPE_INVISIBLE && 2724087e9025SJon Cooper method != RESET_TYPE_DATAPATH) { 2725874aeea5SJeff Kirsher rc = efx->phy_op->init(efx); 2726874aeea5SJeff Kirsher if (rc) 2727874aeea5SJeff Kirsher goto fail; 2728267d9d73SEdward Cree rc = efx->phy_op->reconfigure(efx); 2729267d9d73SEdward Cree if (rc && rc != -EPERM) 2730874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, 2731874aeea5SJeff Kirsher "could not restore PHY settings\n"); 2732874aeea5SJeff Kirsher } 2733874aeea5SJeff Kirsher 2734261e4d96SJon Cooper rc = efx_enable_interrupts(efx); 2735261e4d96SJon Cooper if (rc) 2736261e4d96SJon Cooper goto fail; 27376d8aaaf6SDaniel Pieczko 27386d8aaaf6SDaniel Pieczko #ifdef CONFIG_SFC_SRIOV 27396d8aaaf6SDaniel Pieczko rc = efx->type->vswitching_restore(efx); 27406d8aaaf6SDaniel Pieczko if (rc) /* not fatal; the PF will still work fine */ 27416d8aaaf6SDaniel Pieczko netif_warn(efx, probe, efx->net_dev, 27426d8aaaf6SDaniel Pieczko "failed to restore vswitching rc=%d;" 27436d8aaaf6SDaniel Pieczko " VFs may not function\n", rc); 27446d8aaaf6SDaniel Pieczko #endif 27456d8aaaf6SDaniel Pieczko 274642356d9aSEdward Cree if (efx->type->rx_restore_rss_contexts) 274742356d9aSEdward Cree efx->type->rx_restore_rss_contexts(efx); 2748e0a65e3cSEdward Cree mutex_unlock(&efx->rss_lock); 27490d322413SEdward Cree down_read(&efx->filter_sem); 2750874aeea5SJeff Kirsher efx_restore_filters(efx); 27510d322413SEdward Cree up_read(&efx->filter_sem); 27527fa8d547SShradha Shah if (efx->type->sriov_reset) 2753d98a4ffeSShradha Shah efx->type->sriov_reset(efx); 2754874aeea5SJeff Kirsher 2755874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 2756874aeea5SJeff Kirsher 2757874aeea5SJeff Kirsher efx_start_all(efx); 2758874aeea5SJeff Kirsher 2759e5fbd977SJon Cooper if (efx->type->udp_tnl_push_ports) 2760e5fbd977SJon Cooper efx->type->udp_tnl_push_ports(efx); 2761e5fbd977SJon Cooper 2762874aeea5SJeff Kirsher return 0; 2763874aeea5SJeff Kirsher 2764874aeea5SJeff Kirsher fail: 2765874aeea5SJeff Kirsher efx->port_initialized = false; 2766874aeea5SJeff Kirsher 2767e0a65e3cSEdward Cree mutex_unlock(&efx->rss_lock); 2768874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 2769874aeea5SJeff Kirsher 2770874aeea5SJeff Kirsher return rc; 2771874aeea5SJeff Kirsher } 2772874aeea5SJeff Kirsher 2773874aeea5SJeff Kirsher /* Reset the NIC using the specified method. Note that the reset may 2774874aeea5SJeff Kirsher * fail, in which case the card will be left in an unusable state. 2775874aeea5SJeff Kirsher * 2776874aeea5SJeff Kirsher * Caller must hold the rtnl_lock. 2777874aeea5SJeff Kirsher */ 2778874aeea5SJeff Kirsher int efx_reset(struct efx_nic *efx, enum reset_type method) 2779874aeea5SJeff Kirsher { 2780874aeea5SJeff Kirsher int rc, rc2; 2781874aeea5SJeff Kirsher bool disabled; 2782874aeea5SJeff Kirsher 2783874aeea5SJeff Kirsher netif_info(efx, drv, efx->net_dev, "resetting (%s)\n", 2784874aeea5SJeff Kirsher RESET_TYPE(method)); 2785874aeea5SJeff Kirsher 2786c2f3b8e3SDaniel Pieczko efx_device_detach_sync(efx); 2787874aeea5SJeff Kirsher efx_reset_down(efx, method); 2788874aeea5SJeff Kirsher 2789874aeea5SJeff Kirsher rc = efx->type->reset(efx, method); 2790874aeea5SJeff Kirsher if (rc) { 2791874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, "failed to reset hardware\n"); 2792874aeea5SJeff Kirsher goto out; 2793874aeea5SJeff Kirsher } 2794874aeea5SJeff Kirsher 2795874aeea5SJeff Kirsher /* Clear flags for the scopes we covered. We assume the NIC and 2796874aeea5SJeff Kirsher * driver are now quiescent so that there is no race here. 2797874aeea5SJeff Kirsher */ 2798e283546cSEdward Cree if (method < RESET_TYPE_MAX_METHOD) 2799874aeea5SJeff Kirsher efx->reset_pending &= -(1 << (method + 1)); 2800e283546cSEdward Cree else /* it doesn't fit into the well-ordered scope hierarchy */ 2801e283546cSEdward Cree __clear_bit(method, &efx->reset_pending); 2802874aeea5SJeff Kirsher 2803874aeea5SJeff Kirsher /* Reinitialise bus-mastering, which may have been turned off before 2804874aeea5SJeff Kirsher * the reset was scheduled. This is still appropriate, even in the 2805874aeea5SJeff Kirsher * RESET_TYPE_DISABLE since this driver generally assumes the hardware 2806874aeea5SJeff Kirsher * can respond to requests. */ 2807874aeea5SJeff Kirsher pci_set_master(efx->pci_dev); 2808874aeea5SJeff Kirsher 2809874aeea5SJeff Kirsher out: 2810874aeea5SJeff Kirsher /* Leave device stopped if necessary */ 2811626950dbSAlexandre Rames disabled = rc || 2812626950dbSAlexandre Rames method == RESET_TYPE_DISABLE || 2813626950dbSAlexandre Rames method == RESET_TYPE_RECOVER_OR_DISABLE; 2814874aeea5SJeff Kirsher rc2 = efx_reset_up(efx, method, !disabled); 2815874aeea5SJeff Kirsher if (rc2) { 2816874aeea5SJeff Kirsher disabled = true; 2817874aeea5SJeff Kirsher if (!rc) 2818874aeea5SJeff Kirsher rc = rc2; 2819874aeea5SJeff Kirsher } 2820874aeea5SJeff Kirsher 2821874aeea5SJeff Kirsher if (disabled) { 2822874aeea5SJeff Kirsher dev_close(efx->net_dev); 2823874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, "has been disabled\n"); 2824874aeea5SJeff Kirsher efx->state = STATE_DISABLED; 2825874aeea5SJeff Kirsher } else { 2826874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "reset complete\n"); 28279c568fd8SPeter Dunning efx_device_attach_if_not_resetting(efx); 2828874aeea5SJeff Kirsher } 2829874aeea5SJeff Kirsher return rc; 2830874aeea5SJeff Kirsher } 2831874aeea5SJeff Kirsher 2832626950dbSAlexandre Rames /* Try recovery mechanisms. 2833626950dbSAlexandre Rames * For now only EEH is supported. 2834626950dbSAlexandre Rames * Returns 0 if the recovery mechanisms are unsuccessful. 2835626950dbSAlexandre Rames * Returns a non-zero value otherwise. 2836626950dbSAlexandre Rames */ 2837b28405b0SAlexandre Rames int efx_try_recovery(struct efx_nic *efx) 2838626950dbSAlexandre Rames { 2839626950dbSAlexandre Rames #ifdef CONFIG_EEH 2840626950dbSAlexandre Rames /* A PCI error can occur and not be seen by EEH because nothing 2841626950dbSAlexandre Rames * happens on the PCI bus. In this case the driver may fail and 2842626950dbSAlexandre Rames * schedule a 'recover or reset', leading to this recovery handler. 2843626950dbSAlexandre Rames * Manually call the eeh failure check function. 2844626950dbSAlexandre Rames */ 284512a89dbaSBenjamin Herrenschmidt struct eeh_dev *eehdev = pci_dev_to_eeh_dev(efx->pci_dev); 2846626950dbSAlexandre Rames if (eeh_dev_check_failure(eehdev)) { 2847626950dbSAlexandre Rames /* The EEH mechanisms will handle the error and reset the 2848626950dbSAlexandre Rames * device if necessary. 2849626950dbSAlexandre Rames */ 2850626950dbSAlexandre Rames return 1; 2851626950dbSAlexandre Rames } 2852626950dbSAlexandre Rames #endif 2853626950dbSAlexandre Rames return 0; 2854626950dbSAlexandre Rames } 2855626950dbSAlexandre Rames 285674cd60a4SJon Cooper static void efx_wait_for_bist_end(struct efx_nic *efx) 285774cd60a4SJon Cooper { 285874cd60a4SJon Cooper int i; 285974cd60a4SJon Cooper 286074cd60a4SJon Cooper for (i = 0; i < BIST_WAIT_DELAY_COUNT; ++i) { 286174cd60a4SJon Cooper if (efx_mcdi_poll_reboot(efx)) 286274cd60a4SJon Cooper goto out; 286374cd60a4SJon Cooper msleep(BIST_WAIT_DELAY_MS); 286474cd60a4SJon Cooper } 286574cd60a4SJon Cooper 286674cd60a4SJon Cooper netif_err(efx, drv, efx->net_dev, "Warning: No MC reboot after BIST mode\n"); 286774cd60a4SJon Cooper out: 286874cd60a4SJon Cooper /* Either way unset the BIST flag. If we found no reboot we probably 286974cd60a4SJon Cooper * won't recover, but we should try. 287074cd60a4SJon Cooper */ 287174cd60a4SJon Cooper efx->mc_bist_for_other_fn = false; 287274cd60a4SJon Cooper } 287374cd60a4SJon Cooper 2874874aeea5SJeff Kirsher /* The worker thread exists so that code that cannot sleep can 2875874aeea5SJeff Kirsher * schedule a reset for later. 2876874aeea5SJeff Kirsher */ 2877874aeea5SJeff Kirsher static void efx_reset_work(struct work_struct *data) 2878874aeea5SJeff Kirsher { 2879874aeea5SJeff Kirsher struct efx_nic *efx = container_of(data, struct efx_nic, reset_work); 2880626950dbSAlexandre Rames unsigned long pending; 2881626950dbSAlexandre Rames enum reset_type method; 2882626950dbSAlexandre Rames 28836aa7de05SMark Rutland pending = READ_ONCE(efx->reset_pending); 2884626950dbSAlexandre Rames method = fls(pending) - 1; 2885626950dbSAlexandre Rames 288674cd60a4SJon Cooper if (method == RESET_TYPE_MC_BIST) 288774cd60a4SJon Cooper efx_wait_for_bist_end(efx); 288874cd60a4SJon Cooper 2889626950dbSAlexandre Rames if ((method == RESET_TYPE_RECOVER_OR_DISABLE || 2890626950dbSAlexandre Rames method == RESET_TYPE_RECOVER_OR_ALL) && 2891626950dbSAlexandre Rames efx_try_recovery(efx)) 2892626950dbSAlexandre Rames return; 2893874aeea5SJeff Kirsher 2894874aeea5SJeff Kirsher if (!pending) 2895874aeea5SJeff Kirsher return; 2896874aeea5SJeff Kirsher 2897874aeea5SJeff Kirsher rtnl_lock(); 28987153f623SBen Hutchings 28997153f623SBen Hutchings /* We checked the state in efx_schedule_reset() but it may 29007153f623SBen Hutchings * have changed by now. Now that we have the RTNL lock, 29017153f623SBen Hutchings * it cannot change again. 29027153f623SBen Hutchings */ 29037153f623SBen Hutchings if (efx->state == STATE_READY) 2904626950dbSAlexandre Rames (void)efx_reset(efx, method); 29057153f623SBen Hutchings 2906874aeea5SJeff Kirsher rtnl_unlock(); 2907874aeea5SJeff Kirsher } 2908874aeea5SJeff Kirsher 2909874aeea5SJeff Kirsher void efx_schedule_reset(struct efx_nic *efx, enum reset_type type) 2910874aeea5SJeff Kirsher { 2911874aeea5SJeff Kirsher enum reset_type method; 2912874aeea5SJeff Kirsher 2913626950dbSAlexandre Rames if (efx->state == STATE_RECOVERY) { 2914626950dbSAlexandre Rames netif_dbg(efx, drv, efx->net_dev, 2915626950dbSAlexandre Rames "recovering: skip scheduling %s reset\n", 2916626950dbSAlexandre Rames RESET_TYPE(type)); 2917626950dbSAlexandre Rames return; 2918626950dbSAlexandre Rames } 2919626950dbSAlexandre Rames 2920874aeea5SJeff Kirsher switch (type) { 2921874aeea5SJeff Kirsher case RESET_TYPE_INVISIBLE: 2922874aeea5SJeff Kirsher case RESET_TYPE_ALL: 2923626950dbSAlexandre Rames case RESET_TYPE_RECOVER_OR_ALL: 2924874aeea5SJeff Kirsher case RESET_TYPE_WORLD: 2925874aeea5SJeff Kirsher case RESET_TYPE_DISABLE: 2926626950dbSAlexandre Rames case RESET_TYPE_RECOVER_OR_DISABLE: 2927087e9025SJon Cooper case RESET_TYPE_DATAPATH: 292874cd60a4SJon Cooper case RESET_TYPE_MC_BIST: 2929e283546cSEdward Cree case RESET_TYPE_MCDI_TIMEOUT: 2930874aeea5SJeff Kirsher method = type; 2931874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "scheduling %s reset\n", 2932874aeea5SJeff Kirsher RESET_TYPE(method)); 2933874aeea5SJeff Kirsher break; 2934874aeea5SJeff Kirsher default: 2935874aeea5SJeff Kirsher method = efx->type->map_reset_reason(type); 2936874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, 2937874aeea5SJeff Kirsher "scheduling %s reset for %s\n", 2938874aeea5SJeff Kirsher RESET_TYPE(method), RESET_TYPE(type)); 2939874aeea5SJeff Kirsher break; 2940874aeea5SJeff Kirsher } 2941874aeea5SJeff Kirsher 2942874aeea5SJeff Kirsher set_bit(method, &efx->reset_pending); 29437153f623SBen Hutchings smp_mb(); /* ensure we change reset_pending before checking state */ 29447153f623SBen Hutchings 29457153f623SBen Hutchings /* If we're not READY then just leave the flags set as the cue 29467153f623SBen Hutchings * to abort probing or reschedule the reset later. 29477153f623SBen Hutchings */ 29486aa7de05SMark Rutland if (READ_ONCE(efx->state) != STATE_READY) 29497153f623SBen Hutchings return; 2950874aeea5SJeff Kirsher 2951874aeea5SJeff Kirsher /* efx_process_channel() will no longer read events once a 2952874aeea5SJeff Kirsher * reset is scheduled. So switch back to poll'd MCDI completions. */ 2953874aeea5SJeff Kirsher efx_mcdi_mode_poll(efx); 2954874aeea5SJeff Kirsher 2955874aeea5SJeff Kirsher queue_work(reset_workqueue, &efx->reset_work); 2956874aeea5SJeff Kirsher } 2957874aeea5SJeff Kirsher 2958874aeea5SJeff Kirsher /************************************************************************** 2959874aeea5SJeff Kirsher * 2960874aeea5SJeff Kirsher * List of NICs we support 2961874aeea5SJeff Kirsher * 2962874aeea5SJeff Kirsher **************************************************************************/ 2963874aeea5SJeff Kirsher 2964874aeea5SJeff Kirsher /* PCI device ID table */ 29659baa3c34SBenoit Taine static const struct pci_device_id efx_pci_table[] = { 2966547c474fSBen Hutchings {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0803), /* SFC9020 */ 2967874aeea5SJeff Kirsher .driver_data = (unsigned long) &siena_a0_nic_type}, 2968547c474fSBen Hutchings {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0813), /* SFL9021 */ 2969874aeea5SJeff Kirsher .driver_data = (unsigned long) &siena_a0_nic_type}, 29708127d661SBen Hutchings {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0903), /* SFC9120 PF */ 29718127d661SBen Hutchings .driver_data = (unsigned long) &efx_hunt_a0_nic_type}, 29726f7f8aa6SShradha Shah {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x1903), /* SFC9120 VF */ 29736f7f8aa6SShradha Shah .driver_data = (unsigned long) &efx_hunt_a0_vf_nic_type}, 29743b06a00eSMateusz Wrzesinski {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0923), /* SFC9140 PF */ 29753b06a00eSMateusz Wrzesinski .driver_data = (unsigned long) &efx_hunt_a0_nic_type}, 2976dd248f1bSBert Kenward {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x1923), /* SFC9140 VF */ 2977dd248f1bSBert Kenward .driver_data = (unsigned long) &efx_hunt_a0_vf_nic_type}, 2978dd248f1bSBert Kenward {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0a03), /* SFC9220 PF */ 2979dd248f1bSBert Kenward .driver_data = (unsigned long) &efx_hunt_a0_nic_type}, 2980dd248f1bSBert Kenward {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x1a03), /* SFC9220 VF */ 2981dd248f1bSBert Kenward .driver_data = (unsigned long) &efx_hunt_a0_vf_nic_type}, 2982aae5a316SEdward Cree {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0b03), /* SFC9250 PF */ 2983aae5a316SEdward Cree .driver_data = (unsigned long) &efx_hunt_a0_nic_type}, 2984aae5a316SEdward Cree {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x1b03), /* SFC9250 VF */ 2985aae5a316SEdward Cree .driver_data = (unsigned long) &efx_hunt_a0_vf_nic_type}, 2986874aeea5SJeff Kirsher {0} /* end of list */ 2987874aeea5SJeff Kirsher }; 2988874aeea5SJeff Kirsher 2989874aeea5SJeff Kirsher /************************************************************************** 2990874aeea5SJeff Kirsher * 2991874aeea5SJeff Kirsher * Dummy PHY/MAC operations 2992874aeea5SJeff Kirsher * 2993874aeea5SJeff Kirsher * Can be used for some unimplemented operations 2994874aeea5SJeff Kirsher * Needed so all function pointers are valid and do not have to be tested 2995874aeea5SJeff Kirsher * before use 2996874aeea5SJeff Kirsher * 2997874aeea5SJeff Kirsher **************************************************************************/ 2998874aeea5SJeff Kirsher int efx_port_dummy_op_int(struct efx_nic *efx) 2999874aeea5SJeff Kirsher { 3000874aeea5SJeff Kirsher return 0; 3001874aeea5SJeff Kirsher } 3002874aeea5SJeff Kirsher void efx_port_dummy_op_void(struct efx_nic *efx) {} 3003874aeea5SJeff Kirsher 3004874aeea5SJeff Kirsher static bool efx_port_dummy_op_poll(struct efx_nic *efx) 3005874aeea5SJeff Kirsher { 3006874aeea5SJeff Kirsher return false; 3007874aeea5SJeff Kirsher } 3008874aeea5SJeff Kirsher 3009874aeea5SJeff Kirsher static const struct efx_phy_operations efx_dummy_phy_operations = { 3010874aeea5SJeff Kirsher .init = efx_port_dummy_op_int, 3011874aeea5SJeff Kirsher .reconfigure = efx_port_dummy_op_int, 3012874aeea5SJeff Kirsher .poll = efx_port_dummy_op_poll, 3013874aeea5SJeff Kirsher .fini = efx_port_dummy_op_void, 3014874aeea5SJeff Kirsher }; 3015874aeea5SJeff Kirsher 3016874aeea5SJeff Kirsher /************************************************************************** 3017874aeea5SJeff Kirsher * 3018874aeea5SJeff Kirsher * Data housekeeping 3019874aeea5SJeff Kirsher * 3020874aeea5SJeff Kirsher **************************************************************************/ 3021874aeea5SJeff Kirsher 3022874aeea5SJeff Kirsher /* This zeroes out and then fills in the invariants in a struct 3023874aeea5SJeff Kirsher * efx_nic (including all sub-structures). 3024874aeea5SJeff Kirsher */ 3025adeb15aaSBen Hutchings static int efx_init_struct(struct efx_nic *efx, 3026874aeea5SJeff Kirsher struct pci_dev *pci_dev, struct net_device *net_dev) 3027874aeea5SJeff Kirsher { 30286f9f6ec2SAndrew Rybchenko int rc = -ENOMEM, i; 3029874aeea5SJeff Kirsher 3030874aeea5SJeff Kirsher /* Initialise common structures */ 30310bcf4a64SBen Hutchings INIT_LIST_HEAD(&efx->node); 30320bcf4a64SBen Hutchings INIT_LIST_HEAD(&efx->secondary_list); 3033874aeea5SJeff Kirsher spin_lock_init(&efx->biu_lock); 3034874aeea5SJeff Kirsher #ifdef CONFIG_SFC_MTD 3035874aeea5SJeff Kirsher INIT_LIST_HEAD(&efx->mtd_list); 3036874aeea5SJeff Kirsher #endif 3037874aeea5SJeff Kirsher INIT_WORK(&efx->reset_work, efx_reset_work); 3038874aeea5SJeff Kirsher INIT_DELAYED_WORK(&efx->monitor_work, efx_monitor); 3039dd40781eSBen Hutchings INIT_DELAYED_WORK(&efx->selftest_work, efx_selftest_async_work); 3040874aeea5SJeff Kirsher efx->pci_dev = pci_dev; 3041874aeea5SJeff Kirsher efx->msg_enable = debug; 3042f16aeea0SBen Hutchings efx->state = STATE_UNINIT; 3043874aeea5SJeff Kirsher strlcpy(efx->name, pci_name(pci_dev), sizeof(efx->name)); 3044874aeea5SJeff Kirsher 3045874aeea5SJeff Kirsher efx->net_dev = net_dev; 304643a3739dSJon Cooper efx->rx_prefix_size = efx->type->rx_prefix_size; 30472ec03014SAndrew Rybchenko efx->rx_ip_align = 30482ec03014SAndrew Rybchenko NET_IP_ALIGN ? (efx->rx_prefix_size + NET_IP_ALIGN) % 4 : 0; 304943a3739dSJon Cooper efx->rx_packet_hash_offset = 305043a3739dSJon Cooper efx->type->rx_hash_offset - efx->type->rx_prefix_size; 3051bd9a265dSJon Cooper efx->rx_packet_ts_offset = 3052bd9a265dSJon Cooper efx->type->rx_ts_offset - efx->type->rx_prefix_size; 305342356d9aSEdward Cree INIT_LIST_HEAD(&efx->rss_context.list); 3054e0a65e3cSEdward Cree mutex_init(&efx->rss_lock); 3055874aeea5SJeff Kirsher spin_lock_init(&efx->stats_lock); 305671827443SEdward Cree efx->vi_stride = EFX_DEFAULT_VI_STRIDE; 3057c1be4821SEdward Cree efx->num_mac_stats = MC_CMD_MAC_NSTATS; 3058c1be4821SEdward Cree BUILD_BUG_ON(MC_CMD_MAC_NSTATS - 1 != MC_CMD_MAC_GENERATION_END); 3059874aeea5SJeff Kirsher mutex_init(&efx->mac_lock); 30603af0f342SEdward Cree #ifdef CONFIG_RFS_ACCEL 30613af0f342SEdward Cree mutex_init(&efx->rps_mutex); 30623af0f342SEdward Cree #endif 3063874aeea5SJeff Kirsher efx->phy_op = &efx_dummy_phy_operations; 3064874aeea5SJeff Kirsher efx->mdio.dev = net_dev; 3065874aeea5SJeff Kirsher INIT_WORK(&efx->mac_work, efx_mac_work); 30669f2cb71cSBen Hutchings init_waitqueue_head(&efx->flush_wq); 3067874aeea5SJeff Kirsher 3068874aeea5SJeff Kirsher for (i = 0; i < EFX_MAX_CHANNELS; i++) { 3069874aeea5SJeff Kirsher efx->channel[i] = efx_alloc_channel(efx, i, NULL); 3070874aeea5SJeff Kirsher if (!efx->channel[i]) 3071874aeea5SJeff Kirsher goto fail; 3072d8291187SBen Hutchings efx->msi_context[i].efx = efx; 3073d8291187SBen Hutchings efx->msi_context[i].index = i; 3074874aeea5SJeff Kirsher } 3075874aeea5SJeff Kirsher 3076874aeea5SJeff Kirsher /* Higher numbered interrupt modes are less capable! */ 30776f9f6ec2SAndrew Rybchenko if (WARN_ON_ONCE(efx->type->max_interrupt_mode > 30786f9f6ec2SAndrew Rybchenko efx->type->min_interrupt_mode)) { 30796f9f6ec2SAndrew Rybchenko rc = -EIO; 30806f9f6ec2SAndrew Rybchenko goto fail; 30816f9f6ec2SAndrew Rybchenko } 3082874aeea5SJeff Kirsher efx->interrupt_mode = max(efx->type->max_interrupt_mode, 3083874aeea5SJeff Kirsher interrupt_mode); 30846f9f6ec2SAndrew Rybchenko efx->interrupt_mode = min(efx->type->min_interrupt_mode, 30856f9f6ec2SAndrew Rybchenko interrupt_mode); 3086874aeea5SJeff Kirsher 3087874aeea5SJeff Kirsher /* Would be good to use the net_dev name, but we're too early */ 3088874aeea5SJeff Kirsher snprintf(efx->workqueue_name, sizeof(efx->workqueue_name), "sfc%s", 3089874aeea5SJeff Kirsher pci_name(pci_dev)); 3090874aeea5SJeff Kirsher efx->workqueue = create_singlethread_workqueue(efx->workqueue_name); 3091874aeea5SJeff Kirsher if (!efx->workqueue) 3092874aeea5SJeff Kirsher goto fail; 3093874aeea5SJeff Kirsher 3094874aeea5SJeff Kirsher return 0; 3095874aeea5SJeff Kirsher 3096874aeea5SJeff Kirsher fail: 3097874aeea5SJeff Kirsher efx_fini_struct(efx); 30986f9f6ec2SAndrew Rybchenko return rc; 3099874aeea5SJeff Kirsher } 3100874aeea5SJeff Kirsher 3101874aeea5SJeff Kirsher static void efx_fini_struct(struct efx_nic *efx) 3102874aeea5SJeff Kirsher { 3103874aeea5SJeff Kirsher int i; 3104874aeea5SJeff Kirsher 3105874aeea5SJeff Kirsher for (i = 0; i < EFX_MAX_CHANNELS; i++) 3106874aeea5SJeff Kirsher kfree(efx->channel[i]); 3107874aeea5SJeff Kirsher 3108ef215e64SBen Hutchings kfree(efx->vpd_sn); 3109ef215e64SBen Hutchings 3110874aeea5SJeff Kirsher if (efx->workqueue) { 3111874aeea5SJeff Kirsher destroy_workqueue(efx->workqueue); 3112874aeea5SJeff Kirsher efx->workqueue = NULL; 3113874aeea5SJeff Kirsher } 3114874aeea5SJeff Kirsher } 3115874aeea5SJeff Kirsher 3116e4d112e4SEdward Cree void efx_update_sw_stats(struct efx_nic *efx, u64 *stats) 3117e4d112e4SEdward Cree { 3118e4d112e4SEdward Cree u64 n_rx_nodesc_trunc = 0; 3119e4d112e4SEdward Cree struct efx_channel *channel; 3120e4d112e4SEdward Cree 3121e4d112e4SEdward Cree efx_for_each_channel(channel, efx) 3122e4d112e4SEdward Cree n_rx_nodesc_trunc += channel->n_rx_nodesc_trunc; 3123e4d112e4SEdward Cree stats[GENERIC_STAT_rx_nodesc_trunc] = n_rx_nodesc_trunc; 3124e4d112e4SEdward Cree stats[GENERIC_STAT_rx_noskb_drops] = atomic_read(&efx->n_rx_noskb_drops); 3125e4d112e4SEdward Cree } 3126e4d112e4SEdward Cree 312742356d9aSEdward Cree /* RSS contexts. We're using linked lists and crappy O(n) algorithms, because 312842356d9aSEdward Cree * (a) this is an infrequent control-plane operation and (b) n is small (max 64) 312942356d9aSEdward Cree */ 3130e0a65e3cSEdward Cree struct efx_rss_context *efx_alloc_rss_context_entry(struct efx_nic *efx) 313142356d9aSEdward Cree { 3132e0a65e3cSEdward Cree struct list_head *head = &efx->rss_context.list; 313342356d9aSEdward Cree struct efx_rss_context *ctx, *new; 313442356d9aSEdward Cree u32 id = 1; /* Don't use zero, that refers to the master RSS context */ 313542356d9aSEdward Cree 3136e0a65e3cSEdward Cree WARN_ON(!mutex_is_locked(&efx->rss_lock)); 3137e0a65e3cSEdward Cree 313842356d9aSEdward Cree /* Search for first gap in the numbering */ 313942356d9aSEdward Cree list_for_each_entry(ctx, head, list) { 314042356d9aSEdward Cree if (ctx->user_id != id) 314142356d9aSEdward Cree break; 314242356d9aSEdward Cree id++; 314342356d9aSEdward Cree /* Check for wrap. If this happens, we have nearly 2^32 314442356d9aSEdward Cree * allocated RSS contexts, which seems unlikely. 314542356d9aSEdward Cree */ 314642356d9aSEdward Cree if (WARN_ON_ONCE(!id)) 314742356d9aSEdward Cree return NULL; 314842356d9aSEdward Cree } 314942356d9aSEdward Cree 315042356d9aSEdward Cree /* Create the new entry */ 315142356d9aSEdward Cree new = kmalloc(sizeof(struct efx_rss_context), GFP_KERNEL); 315242356d9aSEdward Cree if (!new) 315342356d9aSEdward Cree return NULL; 315442356d9aSEdward Cree new->context_id = EFX_EF10_RSS_CONTEXT_INVALID; 315542356d9aSEdward Cree new->rx_hash_udp_4tuple = false; 315642356d9aSEdward Cree 315742356d9aSEdward Cree /* Insert the new entry into the gap */ 315842356d9aSEdward Cree new->user_id = id; 315942356d9aSEdward Cree list_add_tail(&new->list, &ctx->list); 316042356d9aSEdward Cree return new; 316142356d9aSEdward Cree } 316242356d9aSEdward Cree 3163e0a65e3cSEdward Cree struct efx_rss_context *efx_find_rss_context_entry(struct efx_nic *efx, u32 id) 316442356d9aSEdward Cree { 3165e0a65e3cSEdward Cree struct list_head *head = &efx->rss_context.list; 316642356d9aSEdward Cree struct efx_rss_context *ctx; 316742356d9aSEdward Cree 3168e0a65e3cSEdward Cree WARN_ON(!mutex_is_locked(&efx->rss_lock)); 3169e0a65e3cSEdward Cree 317042356d9aSEdward Cree list_for_each_entry(ctx, head, list) 317142356d9aSEdward Cree if (ctx->user_id == id) 317242356d9aSEdward Cree return ctx; 317342356d9aSEdward Cree return NULL; 317442356d9aSEdward Cree } 317542356d9aSEdward Cree 317642356d9aSEdward Cree void efx_free_rss_context_entry(struct efx_rss_context *ctx) 317742356d9aSEdward Cree { 317842356d9aSEdward Cree list_del(&ctx->list); 317942356d9aSEdward Cree kfree(ctx); 318042356d9aSEdward Cree } 318142356d9aSEdward Cree 3182874aeea5SJeff Kirsher /************************************************************************** 3183874aeea5SJeff Kirsher * 3184874aeea5SJeff Kirsher * PCI interface 3185874aeea5SJeff Kirsher * 3186874aeea5SJeff Kirsher **************************************************************************/ 3187874aeea5SJeff Kirsher 3188874aeea5SJeff Kirsher /* Main body of final NIC shutdown code 3189874aeea5SJeff Kirsher * This is called only at module unload (or hotplug removal). 3190874aeea5SJeff Kirsher */ 3191874aeea5SJeff Kirsher static void efx_pci_remove_main(struct efx_nic *efx) 3192874aeea5SJeff Kirsher { 31937153f623SBen Hutchings /* Flush reset_work. It can no longer be scheduled since we 31947153f623SBen Hutchings * are not READY. 31957153f623SBen Hutchings */ 31967153f623SBen Hutchings BUG_ON(efx->state == STATE_READY); 31977153f623SBen Hutchings cancel_work_sync(&efx->reset_work); 31987153f623SBen Hutchings 3199d8291187SBen Hutchings efx_disable_interrupts(efx); 3200a83762d9SBert Kenward efx_clear_interrupt_affinity(efx); 3201874aeea5SJeff Kirsher efx_nic_fini_interrupt(efx); 3202874aeea5SJeff Kirsher efx_fini_port(efx); 3203874aeea5SJeff Kirsher efx->type->fini(efx); 3204874aeea5SJeff Kirsher efx_fini_napi(efx); 3205874aeea5SJeff Kirsher efx_remove_all(efx); 3206874aeea5SJeff Kirsher } 3207874aeea5SJeff Kirsher 3208874aeea5SJeff Kirsher /* Final NIC shutdown 32092a3fc311SDaniel Pieczko * This is called only at module unload (or hotplug removal). A PF can call 32102a3fc311SDaniel Pieczko * this on its VFs to ensure they are unbound first. 3211874aeea5SJeff Kirsher */ 3212874aeea5SJeff Kirsher static void efx_pci_remove(struct pci_dev *pci_dev) 3213874aeea5SJeff Kirsher { 3214874aeea5SJeff Kirsher struct efx_nic *efx; 3215874aeea5SJeff Kirsher 3216874aeea5SJeff Kirsher efx = pci_get_drvdata(pci_dev); 3217874aeea5SJeff Kirsher if (!efx) 3218874aeea5SJeff Kirsher return; 3219874aeea5SJeff Kirsher 3220874aeea5SJeff Kirsher /* Mark the NIC as fini, then stop the interface */ 3221874aeea5SJeff Kirsher rtnl_lock(); 32220bcf4a64SBen Hutchings efx_dissociate(efx); 3223874aeea5SJeff Kirsher dev_close(efx->net_dev); 3224d8291187SBen Hutchings efx_disable_interrupts(efx); 3225ea6bb99eSEdward Cree efx->state = STATE_UNINIT; 3226874aeea5SJeff Kirsher rtnl_unlock(); 3227874aeea5SJeff Kirsher 32287fa8d547SShradha Shah if (efx->type->sriov_fini) 3229d98a4ffeSShradha Shah efx->type->sriov_fini(efx); 32307fa8d547SShradha Shah 3231874aeea5SJeff Kirsher efx_unregister_netdev(efx); 3232874aeea5SJeff Kirsher 3233874aeea5SJeff Kirsher efx_mtd_remove(efx); 3234874aeea5SJeff Kirsher 3235874aeea5SJeff Kirsher efx_pci_remove_main(efx); 3236874aeea5SJeff Kirsher 3237874aeea5SJeff Kirsher efx_fini_io(efx); 3238874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "shutdown successful\n"); 3239874aeea5SJeff Kirsher 3240874aeea5SJeff Kirsher efx_fini_struct(efx); 3241874aeea5SJeff Kirsher free_netdev(efx->net_dev); 3242626950dbSAlexandre Rames 3243626950dbSAlexandre Rames pci_disable_pcie_error_reporting(pci_dev); 3244874aeea5SJeff Kirsher }; 3245874aeea5SJeff Kirsher 3246460eeaa0SBen Hutchings /* NIC VPD information 3247460eeaa0SBen Hutchings * Called during probe to display the part number of the 3248460eeaa0SBen Hutchings * installed NIC. VPD is potentially very large but this should 3249460eeaa0SBen Hutchings * always appear within the first 512 bytes. 3250460eeaa0SBen Hutchings */ 3251460eeaa0SBen Hutchings #define SFC_VPD_LEN 512 3252ef215e64SBen Hutchings static void efx_probe_vpd_strings(struct efx_nic *efx) 3253460eeaa0SBen Hutchings { 3254460eeaa0SBen Hutchings struct pci_dev *dev = efx->pci_dev; 3255460eeaa0SBen Hutchings char vpd_data[SFC_VPD_LEN]; 3256460eeaa0SBen Hutchings ssize_t vpd_size; 3257ef215e64SBen Hutchings int ro_start, ro_size, i, j; 3258460eeaa0SBen Hutchings 3259460eeaa0SBen Hutchings /* Get the vpd data from the device */ 3260460eeaa0SBen Hutchings vpd_size = pci_read_vpd(dev, 0, sizeof(vpd_data), vpd_data); 3261460eeaa0SBen Hutchings if (vpd_size <= 0) { 3262460eeaa0SBen Hutchings netif_err(efx, drv, efx->net_dev, "Unable to read VPD\n"); 3263460eeaa0SBen Hutchings return; 3264460eeaa0SBen Hutchings } 3265460eeaa0SBen Hutchings 3266460eeaa0SBen Hutchings /* Get the Read only section */ 3267ef215e64SBen Hutchings ro_start = pci_vpd_find_tag(vpd_data, 0, vpd_size, PCI_VPD_LRDT_RO_DATA); 3268ef215e64SBen Hutchings if (ro_start < 0) { 3269460eeaa0SBen Hutchings netif_err(efx, drv, efx->net_dev, "VPD Read-only not found\n"); 3270460eeaa0SBen Hutchings return; 3271460eeaa0SBen Hutchings } 3272460eeaa0SBen Hutchings 3273ef215e64SBen Hutchings ro_size = pci_vpd_lrdt_size(&vpd_data[ro_start]); 3274ef215e64SBen Hutchings j = ro_size; 3275ef215e64SBen Hutchings i = ro_start + PCI_VPD_LRDT_TAG_SIZE; 3276460eeaa0SBen Hutchings if (i + j > vpd_size) 3277460eeaa0SBen Hutchings j = vpd_size - i; 3278460eeaa0SBen Hutchings 3279460eeaa0SBen Hutchings /* Get the Part number */ 3280460eeaa0SBen Hutchings i = pci_vpd_find_info_keyword(vpd_data, i, j, "PN"); 3281460eeaa0SBen Hutchings if (i < 0) { 3282460eeaa0SBen Hutchings netif_err(efx, drv, efx->net_dev, "Part number not found\n"); 3283460eeaa0SBen Hutchings return; 3284460eeaa0SBen Hutchings } 3285460eeaa0SBen Hutchings 3286460eeaa0SBen Hutchings j = pci_vpd_info_field_size(&vpd_data[i]); 3287460eeaa0SBen Hutchings i += PCI_VPD_INFO_FLD_HDR_SIZE; 3288460eeaa0SBen Hutchings if (i + j > vpd_size) { 3289460eeaa0SBen Hutchings netif_err(efx, drv, efx->net_dev, "Incomplete part number\n"); 3290460eeaa0SBen Hutchings return; 3291460eeaa0SBen Hutchings } 3292460eeaa0SBen Hutchings 3293460eeaa0SBen Hutchings netif_info(efx, drv, efx->net_dev, 3294460eeaa0SBen Hutchings "Part Number : %.*s\n", j, &vpd_data[i]); 3295ef215e64SBen Hutchings 3296ef215e64SBen Hutchings i = ro_start + PCI_VPD_LRDT_TAG_SIZE; 3297ef215e64SBen Hutchings j = ro_size; 3298ef215e64SBen Hutchings i = pci_vpd_find_info_keyword(vpd_data, i, j, "SN"); 3299ef215e64SBen Hutchings if (i < 0) { 3300ef215e64SBen Hutchings netif_err(efx, drv, efx->net_dev, "Serial number not found\n"); 3301ef215e64SBen Hutchings return; 3302ef215e64SBen Hutchings } 3303ef215e64SBen Hutchings 3304ef215e64SBen Hutchings j = pci_vpd_info_field_size(&vpd_data[i]); 3305ef215e64SBen Hutchings i += PCI_VPD_INFO_FLD_HDR_SIZE; 3306ef215e64SBen Hutchings if (i + j > vpd_size) { 3307ef215e64SBen Hutchings netif_err(efx, drv, efx->net_dev, "Incomplete serial number\n"); 3308ef215e64SBen Hutchings return; 3309ef215e64SBen Hutchings } 3310ef215e64SBen Hutchings 3311ef215e64SBen Hutchings efx->vpd_sn = kmalloc(j + 1, GFP_KERNEL); 3312ef215e64SBen Hutchings if (!efx->vpd_sn) 3313ef215e64SBen Hutchings return; 3314ef215e64SBen Hutchings 3315ef215e64SBen Hutchings snprintf(efx->vpd_sn, j + 1, "%s", &vpd_data[i]); 3316460eeaa0SBen Hutchings } 3317460eeaa0SBen Hutchings 3318460eeaa0SBen Hutchings 3319874aeea5SJeff Kirsher /* Main body of NIC initialisation 3320874aeea5SJeff Kirsher * This is called at module load (or hotplug insertion, theoretically). 3321874aeea5SJeff Kirsher */ 3322874aeea5SJeff Kirsher static int efx_pci_probe_main(struct efx_nic *efx) 3323874aeea5SJeff Kirsher { 3324874aeea5SJeff Kirsher int rc; 3325874aeea5SJeff Kirsher 3326874aeea5SJeff Kirsher /* Do start-of-day initialisation */ 3327874aeea5SJeff Kirsher rc = efx_probe_all(efx); 3328874aeea5SJeff Kirsher if (rc) 3329874aeea5SJeff Kirsher goto fail1; 3330874aeea5SJeff Kirsher 3331874aeea5SJeff Kirsher efx_init_napi(efx); 3332874aeea5SJeff Kirsher 3333874aeea5SJeff Kirsher rc = efx->type->init(efx); 3334874aeea5SJeff Kirsher if (rc) { 3335874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 3336874aeea5SJeff Kirsher "failed to initialise NIC\n"); 3337874aeea5SJeff Kirsher goto fail3; 3338874aeea5SJeff Kirsher } 3339874aeea5SJeff Kirsher 3340874aeea5SJeff Kirsher rc = efx_init_port(efx); 3341874aeea5SJeff Kirsher if (rc) { 3342874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 3343874aeea5SJeff Kirsher "failed to initialise port\n"); 3344874aeea5SJeff Kirsher goto fail4; 3345874aeea5SJeff Kirsher } 3346874aeea5SJeff Kirsher 3347874aeea5SJeff Kirsher rc = efx_nic_init_interrupt(efx); 3348874aeea5SJeff Kirsher if (rc) 3349874aeea5SJeff Kirsher goto fail5; 3350a83762d9SBert Kenward 3351a83762d9SBert Kenward efx_set_interrupt_affinity(efx); 3352261e4d96SJon Cooper rc = efx_enable_interrupts(efx); 3353261e4d96SJon Cooper if (rc) 3354261e4d96SJon Cooper goto fail6; 3355874aeea5SJeff Kirsher 3356874aeea5SJeff Kirsher return 0; 3357874aeea5SJeff Kirsher 3358261e4d96SJon Cooper fail6: 3359a83762d9SBert Kenward efx_clear_interrupt_affinity(efx); 3360261e4d96SJon Cooper efx_nic_fini_interrupt(efx); 3361874aeea5SJeff Kirsher fail5: 3362874aeea5SJeff Kirsher efx_fini_port(efx); 3363874aeea5SJeff Kirsher fail4: 3364874aeea5SJeff Kirsher efx->type->fini(efx); 3365874aeea5SJeff Kirsher fail3: 3366874aeea5SJeff Kirsher efx_fini_napi(efx); 3367874aeea5SJeff Kirsher efx_remove_all(efx); 3368874aeea5SJeff Kirsher fail1: 3369874aeea5SJeff Kirsher return rc; 3370874aeea5SJeff Kirsher } 3371874aeea5SJeff Kirsher 33728a531400SJon Cooper static int efx_pci_probe_post_io(struct efx_nic *efx) 33738a531400SJon Cooper { 33748a531400SJon Cooper struct net_device *net_dev = efx->net_dev; 33758a531400SJon Cooper int rc = efx_pci_probe_main(efx); 33768a531400SJon Cooper 33778a531400SJon Cooper if (rc) 33788a531400SJon Cooper return rc; 33798a531400SJon Cooper 33808a531400SJon Cooper if (efx->type->sriov_init) { 33818a531400SJon Cooper rc = efx->type->sriov_init(efx); 33828a531400SJon Cooper if (rc) 33838a531400SJon Cooper netif_err(efx, probe, efx->net_dev, 33848a531400SJon Cooper "SR-IOV can't be enabled rc %d\n", rc); 33858a531400SJon Cooper } 33868a531400SJon Cooper 33878a531400SJon Cooper /* Determine netdevice features */ 33888a531400SJon Cooper net_dev->features |= (efx->type->offload_features | NETIF_F_SG | 33896978729fSEdward Cree NETIF_F_TSO | NETIF_F_RXCSUM | NETIF_F_RXALL); 33908a531400SJon Cooper if (efx->type->offload_features & (NETIF_F_IPV6_CSUM | NETIF_F_HW_CSUM)) 33918a531400SJon Cooper net_dev->features |= NETIF_F_TSO6; 33928a531400SJon Cooper /* Check whether device supports TSO */ 33938a531400SJon Cooper if (!efx->type->tso_versions || !efx->type->tso_versions(efx)) 33948a531400SJon Cooper net_dev->features &= ~NETIF_F_ALL_TSO; 33958a531400SJon Cooper /* Mask for features that also apply to VLAN devices */ 33968a531400SJon Cooper net_dev->vlan_features |= (NETIF_F_HW_CSUM | NETIF_F_SG | 33978a531400SJon Cooper NETIF_F_HIGHDMA | NETIF_F_ALL_TSO | 33988a531400SJon Cooper NETIF_F_RXCSUM); 33998a531400SJon Cooper 34006978729fSEdward Cree net_dev->hw_features |= net_dev->features & ~efx->fixed_features; 34016978729fSEdward Cree 34026978729fSEdward Cree /* Disable receiving frames with bad FCS, by default. */ 34036978729fSEdward Cree net_dev->features &= ~NETIF_F_RXALL; 34048a531400SJon Cooper 34058a531400SJon Cooper /* Disable VLAN filtering by default. It may be enforced if 34068a531400SJon Cooper * the feature is fixed (i.e. VLAN filters are required to 34078a531400SJon Cooper * receive VLAN tagged packets due to vPort restrictions). 34088a531400SJon Cooper */ 34098a531400SJon Cooper net_dev->features &= ~NETIF_F_HW_VLAN_CTAG_FILTER; 34108a531400SJon Cooper net_dev->features |= efx->fixed_features; 34118a531400SJon Cooper 34128a531400SJon Cooper rc = efx_register_netdev(efx); 34138a531400SJon Cooper if (!rc) 34148a531400SJon Cooper return 0; 34158a531400SJon Cooper 34168a531400SJon Cooper efx_pci_remove_main(efx); 34178a531400SJon Cooper return rc; 34188a531400SJon Cooper } 34198a531400SJon Cooper 3420874aeea5SJeff Kirsher /* NIC initialisation 3421874aeea5SJeff Kirsher * 3422874aeea5SJeff Kirsher * This is called at module load (or hotplug insertion, 342373ba7b68SBen Hutchings * theoretically). It sets up PCI mappings, resets the NIC, 3424874aeea5SJeff Kirsher * sets up and registers the network devices with the kernel and hooks 3425874aeea5SJeff Kirsher * the interrupt service routine. It does not prepare the device for 3426874aeea5SJeff Kirsher * transmission; this is left to the first time one of the network 3427874aeea5SJeff Kirsher * interfaces is brought up (i.e. efx_net_open). 3428874aeea5SJeff Kirsher */ 342987d1fc11SBill Pemberton static int efx_pci_probe(struct pci_dev *pci_dev, 3430874aeea5SJeff Kirsher const struct pci_device_id *entry) 3431874aeea5SJeff Kirsher { 3432874aeea5SJeff Kirsher struct net_device *net_dev; 3433874aeea5SJeff Kirsher struct efx_nic *efx; 3434fadac6aaSBen Hutchings int rc; 3435874aeea5SJeff Kirsher 3436874aeea5SJeff Kirsher /* Allocate and initialise a struct net_device and struct efx_nic */ 3437874aeea5SJeff Kirsher net_dev = alloc_etherdev_mqs(sizeof(*efx), EFX_MAX_CORE_TX_QUEUES, 3438874aeea5SJeff Kirsher EFX_MAX_RX_QUEUES); 3439874aeea5SJeff Kirsher if (!net_dev) 3440874aeea5SJeff Kirsher return -ENOMEM; 3441adeb15aaSBen Hutchings efx = netdev_priv(net_dev); 3442adeb15aaSBen Hutchings efx->type = (const struct efx_nic_type *) entry->driver_data; 3443ebfcd0fdSAndrew Rybchenko efx->fixed_features |= NETIF_F_HIGHDMA; 3444eb7cfd8cSAndrew Rybchenko 3445874aeea5SJeff Kirsher pci_set_drvdata(pci_dev, efx); 3446874aeea5SJeff Kirsher SET_NETDEV_DEV(net_dev, &pci_dev->dev); 3447adeb15aaSBen Hutchings rc = efx_init_struct(efx, pci_dev, net_dev); 3448874aeea5SJeff Kirsher if (rc) 3449874aeea5SJeff Kirsher goto fail1; 3450874aeea5SJeff Kirsher 3451874aeea5SJeff Kirsher netif_info(efx, probe, efx->net_dev, 3452874aeea5SJeff Kirsher "Solarflare NIC detected\n"); 3453874aeea5SJeff Kirsher 34546f7f8aa6SShradha Shah if (!efx->type->is_vf) 3455ef215e64SBen Hutchings efx_probe_vpd_strings(efx); 3456460eeaa0SBen Hutchings 3457874aeea5SJeff Kirsher /* Set up basic I/O (BAR mappings etc) */ 3458874aeea5SJeff Kirsher rc = efx_init_io(efx); 3459874aeea5SJeff Kirsher if (rc) 3460874aeea5SJeff Kirsher goto fail2; 3461874aeea5SJeff Kirsher 34628a531400SJon Cooper rc = efx_pci_probe_post_io(efx); 34638a531400SJon Cooper if (rc) { 34648a531400SJon Cooper /* On failure, retry once immediately. 34658a531400SJon Cooper * If we aborted probe due to a scheduled reset, dismiss it. 34668a531400SJon Cooper */ 34678a531400SJon Cooper efx->reset_pending = 0; 34688a531400SJon Cooper rc = efx_pci_probe_post_io(efx); 34698a531400SJon Cooper if (rc) { 34708a531400SJon Cooper /* On another failure, retry once more 34718a531400SJon Cooper * after a 50-305ms delay. 34728a531400SJon Cooper */ 34738a531400SJon Cooper unsigned char r; 34748a531400SJon Cooper 34758a531400SJon Cooper get_random_bytes(&r, 1); 34768a531400SJon Cooper msleep((unsigned int)r + 50); 34778a531400SJon Cooper efx->reset_pending = 0; 34788a531400SJon Cooper rc = efx_pci_probe_post_io(efx); 34798a531400SJon Cooper } 34808a531400SJon Cooper } 3481fadac6aaSBen Hutchings if (rc) 3482874aeea5SJeff Kirsher goto fail3; 3483874aeea5SJeff Kirsher 3484874aeea5SJeff Kirsher netif_dbg(efx, probe, efx->net_dev, "initialisation successful\n"); 3485874aeea5SJeff Kirsher 34867c43161cSBen Hutchings /* Try to create MTDs, but allow this to fail */ 3487874aeea5SJeff Kirsher rtnl_lock(); 34887c43161cSBen Hutchings rc = efx_mtd_probe(efx); 3489874aeea5SJeff Kirsher rtnl_unlock(); 349009a04204SBert Kenward if (rc && rc != -EPERM) 34917c43161cSBen Hutchings netif_warn(efx, probe, efx->net_dev, 34927c43161cSBen Hutchings "failed to create MTDs (%d)\n", rc); 34937c43161cSBen Hutchings 3494626950dbSAlexandre Rames rc = pci_enable_pcie_error_reporting(pci_dev); 3495626950dbSAlexandre Rames if (rc && rc != -EINVAL) 349609a04204SBert Kenward netif_notice(efx, probe, efx->net_dev, 349709a04204SBert Kenward "PCIE error reporting unavailable (%d).\n", 349809a04204SBert Kenward rc); 3499626950dbSAlexandre Rames 3500e5fbd977SJon Cooper if (efx->type->udp_tnl_push_ports) 3501e5fbd977SJon Cooper efx->type->udp_tnl_push_ports(efx); 3502e5fbd977SJon Cooper 3503874aeea5SJeff Kirsher return 0; 3504874aeea5SJeff Kirsher 3505874aeea5SJeff Kirsher fail3: 3506874aeea5SJeff Kirsher efx_fini_io(efx); 3507874aeea5SJeff Kirsher fail2: 3508874aeea5SJeff Kirsher efx_fini_struct(efx); 3509874aeea5SJeff Kirsher fail1: 3510874aeea5SJeff Kirsher WARN_ON(rc > 0); 3511874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "initialisation failed. rc=%d\n", rc); 3512874aeea5SJeff Kirsher free_netdev(net_dev); 3513874aeea5SJeff Kirsher return rc; 3514874aeea5SJeff Kirsher } 3515874aeea5SJeff Kirsher 3516834e23ddSShradha Shah /* efx_pci_sriov_configure returns the actual number of Virtual Functions 3517834e23ddSShradha Shah * enabled on success 3518834e23ddSShradha Shah */ 3519834e23ddSShradha Shah #ifdef CONFIG_SFC_SRIOV 3520834e23ddSShradha Shah static int efx_pci_sriov_configure(struct pci_dev *dev, int num_vfs) 3521834e23ddSShradha Shah { 3522834e23ddSShradha Shah int rc; 3523834e23ddSShradha Shah struct efx_nic *efx = pci_get_drvdata(dev); 3524834e23ddSShradha Shah 3525834e23ddSShradha Shah if (efx->type->sriov_configure) { 3526834e23ddSShradha Shah rc = efx->type->sriov_configure(efx, num_vfs); 3527834e23ddSShradha Shah if (rc) 3528834e23ddSShradha Shah return rc; 3529834e23ddSShradha Shah else 3530834e23ddSShradha Shah return num_vfs; 3531834e23ddSShradha Shah } else 3532834e23ddSShradha Shah return -EOPNOTSUPP; 3533834e23ddSShradha Shah } 3534834e23ddSShradha Shah #endif 3535834e23ddSShradha Shah 3536874aeea5SJeff Kirsher static int efx_pm_freeze(struct device *dev) 3537874aeea5SJeff Kirsher { 3538874aeea5SJeff Kirsher struct efx_nic *efx = pci_get_drvdata(to_pci_dev(dev)); 3539874aeea5SJeff Kirsher 354061da026dSBen Hutchings rtnl_lock(); 354161da026dSBen Hutchings 35426032fb56SBen Hutchings if (efx->state != STATE_DISABLED) { 3543f16aeea0SBen Hutchings efx->state = STATE_UNINIT; 3544874aeea5SJeff Kirsher 3545c2f3b8e3SDaniel Pieczko efx_device_detach_sync(efx); 3546874aeea5SJeff Kirsher 3547874aeea5SJeff Kirsher efx_stop_all(efx); 3548d8291187SBen Hutchings efx_disable_interrupts(efx); 35496032fb56SBen Hutchings } 3550874aeea5SJeff Kirsher 355161da026dSBen Hutchings rtnl_unlock(); 355261da026dSBen Hutchings 3553874aeea5SJeff Kirsher return 0; 3554874aeea5SJeff Kirsher } 3555874aeea5SJeff Kirsher 3556874aeea5SJeff Kirsher static int efx_pm_thaw(struct device *dev) 3557874aeea5SJeff Kirsher { 3558261e4d96SJon Cooper int rc; 3559874aeea5SJeff Kirsher struct efx_nic *efx = pci_get_drvdata(to_pci_dev(dev)); 3560874aeea5SJeff Kirsher 356161da026dSBen Hutchings rtnl_lock(); 356261da026dSBen Hutchings 35636032fb56SBen Hutchings if (efx->state != STATE_DISABLED) { 3564261e4d96SJon Cooper rc = efx_enable_interrupts(efx); 3565261e4d96SJon Cooper if (rc) 3566261e4d96SJon Cooper goto fail; 3567874aeea5SJeff Kirsher 3568874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 3569874aeea5SJeff Kirsher efx->phy_op->reconfigure(efx); 3570874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 3571874aeea5SJeff Kirsher 3572874aeea5SJeff Kirsher efx_start_all(efx); 3573874aeea5SJeff Kirsher 35749c568fd8SPeter Dunning efx_device_attach_if_not_resetting(efx); 3575874aeea5SJeff Kirsher 3576f16aeea0SBen Hutchings efx->state = STATE_READY; 3577874aeea5SJeff Kirsher 3578874aeea5SJeff Kirsher efx->type->resume_wol(efx); 35796032fb56SBen Hutchings } 3580874aeea5SJeff Kirsher 358161da026dSBen Hutchings rtnl_unlock(); 358261da026dSBen Hutchings 3583874aeea5SJeff Kirsher /* Reschedule any quenched resets scheduled during efx_pm_freeze() */ 3584874aeea5SJeff Kirsher queue_work(reset_workqueue, &efx->reset_work); 3585874aeea5SJeff Kirsher 3586874aeea5SJeff Kirsher return 0; 3587261e4d96SJon Cooper 3588261e4d96SJon Cooper fail: 3589261e4d96SJon Cooper rtnl_unlock(); 3590261e4d96SJon Cooper 3591261e4d96SJon Cooper return rc; 3592874aeea5SJeff Kirsher } 3593874aeea5SJeff Kirsher 3594874aeea5SJeff Kirsher static int efx_pm_poweroff(struct device *dev) 3595874aeea5SJeff Kirsher { 3596874aeea5SJeff Kirsher struct pci_dev *pci_dev = to_pci_dev(dev); 3597874aeea5SJeff Kirsher struct efx_nic *efx = pci_get_drvdata(pci_dev); 3598874aeea5SJeff Kirsher 3599874aeea5SJeff Kirsher efx->type->fini(efx); 3600874aeea5SJeff Kirsher 3601874aeea5SJeff Kirsher efx->reset_pending = 0; 3602874aeea5SJeff Kirsher 3603874aeea5SJeff Kirsher pci_save_state(pci_dev); 3604874aeea5SJeff Kirsher return pci_set_power_state(pci_dev, PCI_D3hot); 3605874aeea5SJeff Kirsher } 3606874aeea5SJeff Kirsher 3607874aeea5SJeff Kirsher /* Used for both resume and restore */ 3608874aeea5SJeff Kirsher static int efx_pm_resume(struct device *dev) 3609874aeea5SJeff Kirsher { 3610874aeea5SJeff Kirsher struct pci_dev *pci_dev = to_pci_dev(dev); 3611874aeea5SJeff Kirsher struct efx_nic *efx = pci_get_drvdata(pci_dev); 3612874aeea5SJeff Kirsher int rc; 3613874aeea5SJeff Kirsher 3614874aeea5SJeff Kirsher rc = pci_set_power_state(pci_dev, PCI_D0); 3615874aeea5SJeff Kirsher if (rc) 3616874aeea5SJeff Kirsher return rc; 3617874aeea5SJeff Kirsher pci_restore_state(pci_dev); 3618874aeea5SJeff Kirsher rc = pci_enable_device(pci_dev); 3619874aeea5SJeff Kirsher if (rc) 3620874aeea5SJeff Kirsher return rc; 3621874aeea5SJeff Kirsher pci_set_master(efx->pci_dev); 3622874aeea5SJeff Kirsher rc = efx->type->reset(efx, RESET_TYPE_ALL); 3623874aeea5SJeff Kirsher if (rc) 3624874aeea5SJeff Kirsher return rc; 3625874aeea5SJeff Kirsher rc = efx->type->init(efx); 3626874aeea5SJeff Kirsher if (rc) 3627874aeea5SJeff Kirsher return rc; 3628261e4d96SJon Cooper rc = efx_pm_thaw(dev); 3629261e4d96SJon Cooper return rc; 3630874aeea5SJeff Kirsher } 3631874aeea5SJeff Kirsher 3632874aeea5SJeff Kirsher static int efx_pm_suspend(struct device *dev) 3633874aeea5SJeff Kirsher { 3634874aeea5SJeff Kirsher int rc; 3635874aeea5SJeff Kirsher 3636874aeea5SJeff Kirsher efx_pm_freeze(dev); 3637874aeea5SJeff Kirsher rc = efx_pm_poweroff(dev); 3638874aeea5SJeff Kirsher if (rc) 3639874aeea5SJeff Kirsher efx_pm_resume(dev); 3640874aeea5SJeff Kirsher return rc; 3641874aeea5SJeff Kirsher } 3642874aeea5SJeff Kirsher 364318e83e4cSBen Hutchings static const struct dev_pm_ops efx_pm_ops = { 3644874aeea5SJeff Kirsher .suspend = efx_pm_suspend, 3645874aeea5SJeff Kirsher .resume = efx_pm_resume, 3646874aeea5SJeff Kirsher .freeze = efx_pm_freeze, 3647874aeea5SJeff Kirsher .thaw = efx_pm_thaw, 3648874aeea5SJeff Kirsher .poweroff = efx_pm_poweroff, 3649874aeea5SJeff Kirsher .restore = efx_pm_resume, 3650874aeea5SJeff Kirsher }; 3651874aeea5SJeff Kirsher 3652626950dbSAlexandre Rames /* A PCI error affecting this device was detected. 3653626950dbSAlexandre Rames * At this point MMIO and DMA may be disabled. 3654626950dbSAlexandre Rames * Stop the software path and request a slot reset. 3655626950dbSAlexandre Rames */ 3656debd0034Sstephen hemminger static pci_ers_result_t efx_io_error_detected(struct pci_dev *pdev, 3657626950dbSAlexandre Rames enum pci_channel_state state) 3658626950dbSAlexandre Rames { 3659626950dbSAlexandre Rames pci_ers_result_t status = PCI_ERS_RESULT_RECOVERED; 3660626950dbSAlexandre Rames struct efx_nic *efx = pci_get_drvdata(pdev); 3661626950dbSAlexandre Rames 3662626950dbSAlexandre Rames if (state == pci_channel_io_perm_failure) 3663626950dbSAlexandre Rames return PCI_ERS_RESULT_DISCONNECT; 3664626950dbSAlexandre Rames 3665626950dbSAlexandre Rames rtnl_lock(); 3666626950dbSAlexandre Rames 3667626950dbSAlexandre Rames if (efx->state != STATE_DISABLED) { 3668626950dbSAlexandre Rames efx->state = STATE_RECOVERY; 3669626950dbSAlexandre Rames efx->reset_pending = 0; 3670626950dbSAlexandre Rames 3671626950dbSAlexandre Rames efx_device_detach_sync(efx); 3672626950dbSAlexandre Rames 3673626950dbSAlexandre Rames efx_stop_all(efx); 3674d8291187SBen Hutchings efx_disable_interrupts(efx); 3675626950dbSAlexandre Rames 3676626950dbSAlexandre Rames status = PCI_ERS_RESULT_NEED_RESET; 3677626950dbSAlexandre Rames } else { 3678626950dbSAlexandre Rames /* If the interface is disabled we don't want to do anything 3679626950dbSAlexandre Rames * with it. 3680626950dbSAlexandre Rames */ 3681626950dbSAlexandre Rames status = PCI_ERS_RESULT_RECOVERED; 3682626950dbSAlexandre Rames } 3683626950dbSAlexandre Rames 3684626950dbSAlexandre Rames rtnl_unlock(); 3685626950dbSAlexandre Rames 3686626950dbSAlexandre Rames pci_disable_device(pdev); 3687626950dbSAlexandre Rames 3688626950dbSAlexandre Rames return status; 3689626950dbSAlexandre Rames } 3690626950dbSAlexandre Rames 3691dbedd44eSJoe Perches /* Fake a successful reset, which will be performed later in efx_io_resume. */ 3692debd0034Sstephen hemminger static pci_ers_result_t efx_io_slot_reset(struct pci_dev *pdev) 3693626950dbSAlexandre Rames { 3694626950dbSAlexandre Rames struct efx_nic *efx = pci_get_drvdata(pdev); 3695626950dbSAlexandre Rames pci_ers_result_t status = PCI_ERS_RESULT_RECOVERED; 3696626950dbSAlexandre Rames int rc; 3697626950dbSAlexandre Rames 3698626950dbSAlexandre Rames if (pci_enable_device(pdev)) { 3699626950dbSAlexandre Rames netif_err(efx, hw, efx->net_dev, 3700626950dbSAlexandre Rames "Cannot re-enable PCI device after reset.\n"); 3701626950dbSAlexandre Rames status = PCI_ERS_RESULT_DISCONNECT; 3702626950dbSAlexandre Rames } 3703626950dbSAlexandre Rames 3704626950dbSAlexandre Rames rc = pci_cleanup_aer_uncorrect_error_status(pdev); 3705626950dbSAlexandre Rames if (rc) { 3706626950dbSAlexandre Rames netif_err(efx, hw, efx->net_dev, 3707626950dbSAlexandre Rames "pci_cleanup_aer_uncorrect_error_status failed (%d)\n", rc); 3708626950dbSAlexandre Rames /* Non-fatal error. Continue. */ 3709626950dbSAlexandre Rames } 3710626950dbSAlexandre Rames 3711626950dbSAlexandre Rames return status; 3712626950dbSAlexandre Rames } 3713626950dbSAlexandre Rames 3714626950dbSAlexandre Rames /* Perform the actual reset and resume I/O operations. */ 3715626950dbSAlexandre Rames static void efx_io_resume(struct pci_dev *pdev) 3716626950dbSAlexandre Rames { 3717626950dbSAlexandre Rames struct efx_nic *efx = pci_get_drvdata(pdev); 3718626950dbSAlexandre Rames int rc; 3719626950dbSAlexandre Rames 3720626950dbSAlexandre Rames rtnl_lock(); 3721626950dbSAlexandre Rames 3722626950dbSAlexandre Rames if (efx->state == STATE_DISABLED) 3723626950dbSAlexandre Rames goto out; 3724626950dbSAlexandre Rames 3725626950dbSAlexandre Rames rc = efx_reset(efx, RESET_TYPE_ALL); 3726626950dbSAlexandre Rames if (rc) { 3727626950dbSAlexandre Rames netif_err(efx, hw, efx->net_dev, 3728626950dbSAlexandre Rames "efx_reset failed after PCI error (%d)\n", rc); 3729626950dbSAlexandre Rames } else { 3730626950dbSAlexandre Rames efx->state = STATE_READY; 3731626950dbSAlexandre Rames netif_dbg(efx, hw, efx->net_dev, 3732626950dbSAlexandre Rames "Done resetting and resuming IO after PCI error.\n"); 3733626950dbSAlexandre Rames } 3734626950dbSAlexandre Rames 3735626950dbSAlexandre Rames out: 3736626950dbSAlexandre Rames rtnl_unlock(); 3737626950dbSAlexandre Rames } 3738626950dbSAlexandre Rames 3739626950dbSAlexandre Rames /* For simplicity and reliability, we always require a slot reset and try to 3740626950dbSAlexandre Rames * reset the hardware when a pci error affecting the device is detected. 3741626950dbSAlexandre Rames * We leave both the link_reset and mmio_enabled callback unimplemented: 3742626950dbSAlexandre Rames * with our request for slot reset the mmio_enabled callback will never be 3743626950dbSAlexandre Rames * called, and the link_reset callback is not used by AER or EEH mechanisms. 3744626950dbSAlexandre Rames */ 3745c300366bSJulia Lawall static const struct pci_error_handlers efx_err_handlers = { 3746626950dbSAlexandre Rames .error_detected = efx_io_error_detected, 3747626950dbSAlexandre Rames .slot_reset = efx_io_slot_reset, 3748626950dbSAlexandre Rames .resume = efx_io_resume, 3749626950dbSAlexandre Rames }; 3750626950dbSAlexandre Rames 3751874aeea5SJeff Kirsher static struct pci_driver efx_pci_driver = { 3752874aeea5SJeff Kirsher .name = KBUILD_MODNAME, 3753874aeea5SJeff Kirsher .id_table = efx_pci_table, 3754874aeea5SJeff Kirsher .probe = efx_pci_probe, 3755874aeea5SJeff Kirsher .remove = efx_pci_remove, 3756874aeea5SJeff Kirsher .driver.pm = &efx_pm_ops, 3757626950dbSAlexandre Rames .err_handler = &efx_err_handlers, 3758834e23ddSShradha Shah #ifdef CONFIG_SFC_SRIOV 3759834e23ddSShradha Shah .sriov_configure = efx_pci_sriov_configure, 3760834e23ddSShradha Shah #endif 3761874aeea5SJeff Kirsher }; 3762874aeea5SJeff Kirsher 3763874aeea5SJeff Kirsher /************************************************************************** 3764874aeea5SJeff Kirsher * 3765874aeea5SJeff Kirsher * Kernel module interface 3766874aeea5SJeff Kirsher * 3767874aeea5SJeff Kirsher *************************************************************************/ 3768874aeea5SJeff Kirsher 3769874aeea5SJeff Kirsher module_param(interrupt_mode, uint, 0444); 3770874aeea5SJeff Kirsher MODULE_PARM_DESC(interrupt_mode, 3771874aeea5SJeff Kirsher "Interrupt mode (0=>MSIX 1=>MSI 2=>legacy)"); 3772874aeea5SJeff Kirsher 3773874aeea5SJeff Kirsher static int __init efx_init_module(void) 3774874aeea5SJeff Kirsher { 3775874aeea5SJeff Kirsher int rc; 3776874aeea5SJeff Kirsher 3777874aeea5SJeff Kirsher printk(KERN_INFO "Solarflare NET driver v" EFX_DRIVER_VERSION "\n"); 3778874aeea5SJeff Kirsher 3779874aeea5SJeff Kirsher rc = register_netdevice_notifier(&efx_netdev_notifier); 3780874aeea5SJeff Kirsher if (rc) 3781874aeea5SJeff Kirsher goto err_notifier; 3782874aeea5SJeff Kirsher 37837fa8d547SShradha Shah #ifdef CONFIG_SFC_SRIOV 3784cd2d5b52SBen Hutchings rc = efx_init_sriov(); 3785cd2d5b52SBen Hutchings if (rc) 3786cd2d5b52SBen Hutchings goto err_sriov; 37877fa8d547SShradha Shah #endif 3788cd2d5b52SBen Hutchings 3789874aeea5SJeff Kirsher reset_workqueue = create_singlethread_workqueue("sfc_reset"); 3790874aeea5SJeff Kirsher if (!reset_workqueue) { 3791874aeea5SJeff Kirsher rc = -ENOMEM; 3792874aeea5SJeff Kirsher goto err_reset; 3793874aeea5SJeff Kirsher } 3794874aeea5SJeff Kirsher 3795874aeea5SJeff Kirsher rc = pci_register_driver(&efx_pci_driver); 3796874aeea5SJeff Kirsher if (rc < 0) 3797874aeea5SJeff Kirsher goto err_pci; 3798874aeea5SJeff Kirsher 3799874aeea5SJeff Kirsher return 0; 3800874aeea5SJeff Kirsher 3801874aeea5SJeff Kirsher err_pci: 3802874aeea5SJeff Kirsher destroy_workqueue(reset_workqueue); 3803874aeea5SJeff Kirsher err_reset: 38047fa8d547SShradha Shah #ifdef CONFIG_SFC_SRIOV 3805cd2d5b52SBen Hutchings efx_fini_sriov(); 3806cd2d5b52SBen Hutchings err_sriov: 38077fa8d547SShradha Shah #endif 3808874aeea5SJeff Kirsher unregister_netdevice_notifier(&efx_netdev_notifier); 3809874aeea5SJeff Kirsher err_notifier: 3810874aeea5SJeff Kirsher return rc; 3811874aeea5SJeff Kirsher } 3812874aeea5SJeff Kirsher 3813874aeea5SJeff Kirsher static void __exit efx_exit_module(void) 3814874aeea5SJeff Kirsher { 3815874aeea5SJeff Kirsher printk(KERN_INFO "Solarflare NET driver unloading\n"); 3816874aeea5SJeff Kirsher 3817874aeea5SJeff Kirsher pci_unregister_driver(&efx_pci_driver); 3818874aeea5SJeff Kirsher destroy_workqueue(reset_workqueue); 38197fa8d547SShradha Shah #ifdef CONFIG_SFC_SRIOV 3820cd2d5b52SBen Hutchings efx_fini_sriov(); 38217fa8d547SShradha Shah #endif 3822874aeea5SJeff Kirsher unregister_netdevice_notifier(&efx_netdev_notifier); 3823874aeea5SJeff Kirsher 3824874aeea5SJeff Kirsher } 3825874aeea5SJeff Kirsher 3826874aeea5SJeff Kirsher module_init(efx_init_module); 3827874aeea5SJeff Kirsher module_exit(efx_exit_module); 3828874aeea5SJeff Kirsher 3829874aeea5SJeff Kirsher MODULE_AUTHOR("Solarflare Communications and " 3830874aeea5SJeff Kirsher "Michael Brown <mbrown@fensystems.co.uk>"); 38316a350fdbSBen Hutchings MODULE_DESCRIPTION("Solarflare network driver"); 3832874aeea5SJeff Kirsher MODULE_LICENSE("GPL"); 3833874aeea5SJeff Kirsher MODULE_DEVICE_TABLE(pci, efx_pci_table); 383414077e9eSEdward Cree MODULE_VERSION(EFX_DRIVER_VERSION); 3835