1d2912cb1SThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only 2874aeea5SJeff Kirsher /**************************************************************************** 3f7a6d2c4SBen Hutchings * Driver for Solarflare network controllers and boards 4874aeea5SJeff Kirsher * Copyright 2005-2006 Fen Systems Ltd. 5f7a6d2c4SBen Hutchings * Copyright 2005-2013 Solarflare Communications Inc. 6874aeea5SJeff Kirsher */ 7874aeea5SJeff Kirsher 8874aeea5SJeff Kirsher #include <linux/module.h> 9874aeea5SJeff Kirsher #include <linux/pci.h> 10874aeea5SJeff Kirsher #include <linux/netdevice.h> 11874aeea5SJeff Kirsher #include <linux/etherdevice.h> 12874aeea5SJeff Kirsher #include <linux/delay.h> 13874aeea5SJeff Kirsher #include <linux/notifier.h> 14874aeea5SJeff Kirsher #include <linux/ip.h> 15874aeea5SJeff Kirsher #include <linux/tcp.h> 16874aeea5SJeff Kirsher #include <linux/in.h> 17874aeea5SJeff Kirsher #include <linux/ethtool.h> 18874aeea5SJeff Kirsher #include <linux/topology.h> 19874aeea5SJeff Kirsher #include <linux/gfp.h> 20626950dbSAlexandre Rames #include <linux/aer.h> 21b28405b0SAlexandre Rames #include <linux/interrupt.h> 22874aeea5SJeff Kirsher #include "net_driver.h" 23e5fbd977SJon Cooper #include <net/gre.h> 24e5fbd977SJon Cooper #include <net/udp_tunnel.h> 25874aeea5SJeff Kirsher #include "efx.h" 26874aeea5SJeff Kirsher #include "nic.h" 2771827443SEdward Cree #include "io.h" 28dd40781eSBen Hutchings #include "selftest.h" 297fa8d547SShradha Shah #include "sriov.h" 30874aeea5SJeff Kirsher 31874aeea5SJeff Kirsher #include "mcdi.h" 32e5fbd977SJon Cooper #include "mcdi_pcol.h" 33874aeea5SJeff Kirsher #include "workarounds.h" 34874aeea5SJeff Kirsher 35874aeea5SJeff Kirsher /************************************************************************** 36874aeea5SJeff Kirsher * 37874aeea5SJeff Kirsher * Type name strings 38874aeea5SJeff Kirsher * 39874aeea5SJeff Kirsher ************************************************************************** 40874aeea5SJeff Kirsher */ 41874aeea5SJeff Kirsher 42874aeea5SJeff Kirsher /* Loopback mode names (see LOOPBACK_MODE()) */ 43874aeea5SJeff Kirsher const unsigned int efx_loopback_mode_max = LOOPBACK_MAX; 4418e83e4cSBen Hutchings const char *const efx_loopback_mode_names[] = { 45874aeea5SJeff Kirsher [LOOPBACK_NONE] = "NONE", 46874aeea5SJeff Kirsher [LOOPBACK_DATA] = "DATAPATH", 47874aeea5SJeff Kirsher [LOOPBACK_GMAC] = "GMAC", 48874aeea5SJeff Kirsher [LOOPBACK_XGMII] = "XGMII", 49874aeea5SJeff Kirsher [LOOPBACK_XGXS] = "XGXS", 50874aeea5SJeff Kirsher [LOOPBACK_XAUI] = "XAUI", 51874aeea5SJeff Kirsher [LOOPBACK_GMII] = "GMII", 52874aeea5SJeff Kirsher [LOOPBACK_SGMII] = "SGMII", 53874aeea5SJeff Kirsher [LOOPBACK_XGBR] = "XGBR", 54874aeea5SJeff Kirsher [LOOPBACK_XFI] = "XFI", 55874aeea5SJeff Kirsher [LOOPBACK_XAUI_FAR] = "XAUI_FAR", 56874aeea5SJeff Kirsher [LOOPBACK_GMII_FAR] = "GMII_FAR", 57874aeea5SJeff Kirsher [LOOPBACK_SGMII_FAR] = "SGMII_FAR", 58874aeea5SJeff Kirsher [LOOPBACK_XFI_FAR] = "XFI_FAR", 59874aeea5SJeff Kirsher [LOOPBACK_GPHY] = "GPHY", 60874aeea5SJeff Kirsher [LOOPBACK_PHYXS] = "PHYXS", 61874aeea5SJeff Kirsher [LOOPBACK_PCS] = "PCS", 62874aeea5SJeff Kirsher [LOOPBACK_PMAPMD] = "PMA/PMD", 63874aeea5SJeff Kirsher [LOOPBACK_XPORT] = "XPORT", 64874aeea5SJeff Kirsher [LOOPBACK_XGMII_WS] = "XGMII_WS", 65874aeea5SJeff Kirsher [LOOPBACK_XAUI_WS] = "XAUI_WS", 66874aeea5SJeff Kirsher [LOOPBACK_XAUI_WS_FAR] = "XAUI_WS_FAR", 67874aeea5SJeff Kirsher [LOOPBACK_XAUI_WS_NEAR] = "XAUI_WS_NEAR", 68874aeea5SJeff Kirsher [LOOPBACK_GMII_WS] = "GMII_WS", 69874aeea5SJeff Kirsher [LOOPBACK_XFI_WS] = "XFI_WS", 70874aeea5SJeff Kirsher [LOOPBACK_XFI_WS_FAR] = "XFI_WS_FAR", 71874aeea5SJeff Kirsher [LOOPBACK_PHYXS_WS] = "PHYXS_WS", 72874aeea5SJeff Kirsher }; 73874aeea5SJeff Kirsher 74874aeea5SJeff Kirsher const unsigned int efx_reset_type_max = RESET_TYPE_MAX; 7518e83e4cSBen Hutchings const char *const efx_reset_type_names[] = { 76874aeea5SJeff Kirsher [RESET_TYPE_INVISIBLE] = "INVISIBLE", 77874aeea5SJeff Kirsher [RESET_TYPE_ALL] = "ALL", 78626950dbSAlexandre Rames [RESET_TYPE_RECOVER_OR_ALL] = "RECOVER_OR_ALL", 79874aeea5SJeff Kirsher [RESET_TYPE_WORLD] = "WORLD", 80626950dbSAlexandre Rames [RESET_TYPE_RECOVER_OR_DISABLE] = "RECOVER_OR_DISABLE", 81087e9025SJon Cooper [RESET_TYPE_DATAPATH] = "DATAPATH", 82e283546cSEdward Cree [RESET_TYPE_MC_BIST] = "MC_BIST", 83874aeea5SJeff Kirsher [RESET_TYPE_DISABLE] = "DISABLE", 84874aeea5SJeff Kirsher [RESET_TYPE_TX_WATCHDOG] = "TX_WATCHDOG", 85874aeea5SJeff Kirsher [RESET_TYPE_INT_ERROR] = "INT_ERROR", 863de82b91SAlexandre Rames [RESET_TYPE_DMA_ERROR] = "DMA_ERROR", 87874aeea5SJeff Kirsher [RESET_TYPE_TX_SKIP] = "TX_SKIP", 88874aeea5SJeff Kirsher [RESET_TYPE_MC_FAILURE] = "MC_FAILURE", 89e283546cSEdward Cree [RESET_TYPE_MCDI_TIMEOUT] = "MCDI_TIMEOUT (FLR)", 90874aeea5SJeff Kirsher }; 91874aeea5SJeff Kirsher 92e5fbd977SJon Cooper /* UDP tunnel type names */ 93e5fbd977SJon Cooper static const char *const efx_udp_tunnel_type_names[] = { 94e5fbd977SJon Cooper [TUNNEL_ENCAP_UDP_PORT_ENTRY_VXLAN] = "vxlan", 95e5fbd977SJon Cooper [TUNNEL_ENCAP_UDP_PORT_ENTRY_GENEVE] = "geneve", 96e5fbd977SJon Cooper }; 97e5fbd977SJon Cooper 98e5fbd977SJon Cooper void efx_get_udp_tunnel_type_name(u16 type, char *buf, size_t buflen) 99e5fbd977SJon Cooper { 100e5fbd977SJon Cooper if (type < ARRAY_SIZE(efx_udp_tunnel_type_names) && 101e5fbd977SJon Cooper efx_udp_tunnel_type_names[type] != NULL) 102e5fbd977SJon Cooper snprintf(buf, buflen, "%s", efx_udp_tunnel_type_names[type]); 103e5fbd977SJon Cooper else 104e5fbd977SJon Cooper snprintf(buf, buflen, "type %d", type); 105e5fbd977SJon Cooper } 106e5fbd977SJon Cooper 107874aeea5SJeff Kirsher /* Reset workqueue. If any NIC has a hardware failure then a reset will be 108874aeea5SJeff Kirsher * queued onto this work queue. This is not a per-nic work queue, because 109874aeea5SJeff Kirsher * efx_reset_work() acquires the rtnl lock, so resets are naturally serialised. 110874aeea5SJeff Kirsher */ 111874aeea5SJeff Kirsher static struct workqueue_struct *reset_workqueue; 112874aeea5SJeff Kirsher 11374cd60a4SJon Cooper /* How often and how many times to poll for a reset while waiting for a 11474cd60a4SJon Cooper * BIST that another function started to complete. 11574cd60a4SJon Cooper */ 11674cd60a4SJon Cooper #define BIST_WAIT_DELAY_MS 100 11774cd60a4SJon Cooper #define BIST_WAIT_DELAY_COUNT 100 11874cd60a4SJon Cooper 119874aeea5SJeff Kirsher /************************************************************************** 120874aeea5SJeff Kirsher * 121874aeea5SJeff Kirsher * Configurable values 122874aeea5SJeff Kirsher * 123874aeea5SJeff Kirsher *************************************************************************/ 124874aeea5SJeff Kirsher 125874aeea5SJeff Kirsher /* 126874aeea5SJeff Kirsher * Use separate channels for TX and RX events 127874aeea5SJeff Kirsher * 128874aeea5SJeff Kirsher * Set this to 1 to use separate channels for TX and RX. It allows us 129874aeea5SJeff Kirsher * to control interrupt affinity separately for TX and RX. 130874aeea5SJeff Kirsher * 131874aeea5SJeff Kirsher * This is only used in MSI-X interrupt mode 132874aeea5SJeff Kirsher */ 133b0fbdae1SShradha Shah bool efx_separate_tx_channels; 134b0fbdae1SShradha Shah module_param(efx_separate_tx_channels, bool, 0444); 135b0fbdae1SShradha Shah MODULE_PARM_DESC(efx_separate_tx_channels, 136874aeea5SJeff Kirsher "Use separate channels for TX and RX"); 137874aeea5SJeff Kirsher 138874aeea5SJeff Kirsher /* This is the weight assigned to each of the (per-channel) virtual 139874aeea5SJeff Kirsher * NAPI devices. 140874aeea5SJeff Kirsher */ 141874aeea5SJeff Kirsher static int napi_weight = 64; 142874aeea5SJeff Kirsher 143874aeea5SJeff Kirsher /* This is the time (in jiffies) between invocations of the hardware 144626950dbSAlexandre Rames * monitor. 145626950dbSAlexandre Rames * On Falcon-based NICs, this will: 146874aeea5SJeff Kirsher * - Check the on-board hardware monitor; 147874aeea5SJeff Kirsher * - Poll the link state and reconfigure the hardware as necessary. 148626950dbSAlexandre Rames * On Siena-based NICs for power systems with EEH support, this will give EEH a 149626950dbSAlexandre Rames * chance to start. 150874aeea5SJeff Kirsher */ 151874aeea5SJeff Kirsher static unsigned int efx_monitor_interval = 1 * HZ; 152874aeea5SJeff Kirsher 153874aeea5SJeff Kirsher /* Initial interrupt moderation settings. They can be modified after 154874aeea5SJeff Kirsher * module load with ethtool. 155874aeea5SJeff Kirsher * 156874aeea5SJeff Kirsher * The default for RX should strike a balance between increasing the 157874aeea5SJeff Kirsher * round-trip latency and reducing overhead. 158874aeea5SJeff Kirsher */ 159874aeea5SJeff Kirsher static unsigned int rx_irq_mod_usec = 60; 160874aeea5SJeff Kirsher 161874aeea5SJeff Kirsher /* Initial interrupt moderation settings. They can be modified after 162874aeea5SJeff Kirsher * module load with ethtool. 163874aeea5SJeff Kirsher * 164874aeea5SJeff Kirsher * This default is chosen to ensure that a 10G link does not go idle 165874aeea5SJeff Kirsher * while a TX queue is stopped after it has become full. A queue is 166874aeea5SJeff Kirsher * restarted when it drops below half full. The time this takes (assuming 167874aeea5SJeff Kirsher * worst case 3 descriptors per packet and 1024 descriptors) is 168874aeea5SJeff Kirsher * 512 / 3 * 1.2 = 205 usec. 169874aeea5SJeff Kirsher */ 170874aeea5SJeff Kirsher static unsigned int tx_irq_mod_usec = 150; 171874aeea5SJeff Kirsher 172874aeea5SJeff Kirsher /* This is the first interrupt mode to try out of: 173874aeea5SJeff Kirsher * 0 => MSI-X 174874aeea5SJeff Kirsher * 1 => MSI 175874aeea5SJeff Kirsher * 2 => legacy 176874aeea5SJeff Kirsher */ 177874aeea5SJeff Kirsher static unsigned int interrupt_mode; 178874aeea5SJeff Kirsher 179874aeea5SJeff Kirsher /* This is the requested number of CPUs to use for Receive-Side Scaling (RSS), 180874aeea5SJeff Kirsher * i.e. the number of CPUs among which we may distribute simultaneous 181874aeea5SJeff Kirsher * interrupt handling. 182874aeea5SJeff Kirsher * 183874aeea5SJeff Kirsher * Cards without MSI-X will only target one CPU via legacy or MSI interrupt. 184cdb08f8fSBen Hutchings * The default (0) means to assign an interrupt to each core. 185874aeea5SJeff Kirsher */ 186874aeea5SJeff Kirsher static unsigned int rss_cpus; 187874aeea5SJeff Kirsher module_param(rss_cpus, uint, 0444); 188874aeea5SJeff Kirsher MODULE_PARM_DESC(rss_cpus, "Number of CPUs to use for Receive-Side Scaling"); 189874aeea5SJeff Kirsher 190b9cc977dSBen Hutchings static bool phy_flash_cfg; 191b9cc977dSBen Hutchings module_param(phy_flash_cfg, bool, 0644); 192874aeea5SJeff Kirsher MODULE_PARM_DESC(phy_flash_cfg, "Set PHYs into reflash mode initially"); 193874aeea5SJeff Kirsher 194e7bed9c8SBen Hutchings static unsigned irq_adapt_low_thresh = 8000; 195874aeea5SJeff Kirsher module_param(irq_adapt_low_thresh, uint, 0644); 196874aeea5SJeff Kirsher MODULE_PARM_DESC(irq_adapt_low_thresh, 197874aeea5SJeff Kirsher "Threshold score for reducing IRQ moderation"); 198874aeea5SJeff Kirsher 199e7bed9c8SBen Hutchings static unsigned irq_adapt_high_thresh = 16000; 200874aeea5SJeff Kirsher module_param(irq_adapt_high_thresh, uint, 0644); 201874aeea5SJeff Kirsher MODULE_PARM_DESC(irq_adapt_high_thresh, 202874aeea5SJeff Kirsher "Threshold score for increasing IRQ moderation"); 203874aeea5SJeff Kirsher 204874aeea5SJeff Kirsher static unsigned debug = (NETIF_MSG_DRV | NETIF_MSG_PROBE | 205874aeea5SJeff Kirsher NETIF_MSG_LINK | NETIF_MSG_IFDOWN | 206874aeea5SJeff Kirsher NETIF_MSG_IFUP | NETIF_MSG_RX_ERR | 207874aeea5SJeff Kirsher NETIF_MSG_TX_ERR | NETIF_MSG_HW); 208874aeea5SJeff Kirsher module_param(debug, uint, 0); 209874aeea5SJeff Kirsher MODULE_PARM_DESC(debug, "Bitmapped debugging message enable value"); 210874aeea5SJeff Kirsher 211874aeea5SJeff Kirsher /************************************************************************** 212874aeea5SJeff Kirsher * 213874aeea5SJeff Kirsher * Utility functions and prototypes 214874aeea5SJeff Kirsher * 215874aeea5SJeff Kirsher *************************************************************************/ 216874aeea5SJeff Kirsher 217261e4d96SJon Cooper static int efx_soft_enable_interrupts(struct efx_nic *efx); 218d8291187SBen Hutchings static void efx_soft_disable_interrupts(struct efx_nic *efx); 2197f967c01SBen Hutchings static void efx_remove_channel(struct efx_channel *channel); 220874aeea5SJeff Kirsher static void efx_remove_channels(struct efx_nic *efx); 2217f967c01SBen Hutchings static const struct efx_channel_type efx_default_channel_type; 222874aeea5SJeff Kirsher static void efx_remove_port(struct efx_nic *efx); 2237f967c01SBen Hutchings static void efx_init_napi_channel(struct efx_channel *channel); 224874aeea5SJeff Kirsher static void efx_fini_napi(struct efx_nic *efx); 225874aeea5SJeff Kirsher static void efx_fini_napi_channel(struct efx_channel *channel); 226874aeea5SJeff Kirsher static void efx_fini_struct(struct efx_nic *efx); 227874aeea5SJeff Kirsher static void efx_start_all(struct efx_nic *efx); 228874aeea5SJeff Kirsher static void efx_stop_all(struct efx_nic *efx); 229e45a4fedSCharles McLachlan static int efx_xdp_setup_prog(struct efx_nic *efx, struct bpf_prog *prog); 230e45a4fedSCharles McLachlan static int efx_xdp(struct net_device *dev, struct netdev_bpf *xdp); 231874aeea5SJeff Kirsher 232874aeea5SJeff Kirsher #define EFX_ASSERT_RESET_SERIALISED(efx) \ 233874aeea5SJeff Kirsher do { \ 234f16aeea0SBen Hutchings if ((efx->state == STATE_READY) || \ 235626950dbSAlexandre Rames (efx->state == STATE_RECOVERY) || \ 236874aeea5SJeff Kirsher (efx->state == STATE_DISABLED)) \ 237874aeea5SJeff Kirsher ASSERT_RTNL(); \ 238874aeea5SJeff Kirsher } while (0) 239874aeea5SJeff Kirsher 2408b7325b4SBen Hutchings static int efx_check_disabled(struct efx_nic *efx) 2418b7325b4SBen Hutchings { 242626950dbSAlexandre Rames if (efx->state == STATE_DISABLED || efx->state == STATE_RECOVERY) { 2438b7325b4SBen Hutchings netif_err(efx, drv, efx->net_dev, 2448b7325b4SBen Hutchings "device is disabled due to earlier errors\n"); 2458b7325b4SBen Hutchings return -EIO; 2468b7325b4SBen Hutchings } 2478b7325b4SBen Hutchings return 0; 2488b7325b4SBen Hutchings } 2498b7325b4SBen Hutchings 250874aeea5SJeff Kirsher /************************************************************************** 251874aeea5SJeff Kirsher * 252874aeea5SJeff Kirsher * Event queue processing 253874aeea5SJeff Kirsher * 254874aeea5SJeff Kirsher *************************************************************************/ 255874aeea5SJeff Kirsher 256874aeea5SJeff Kirsher /* Process channel's event queue 257874aeea5SJeff Kirsher * 258874aeea5SJeff Kirsher * This function is responsible for processing the event queue of a 259874aeea5SJeff Kirsher * single channel. The caller must guarantee that this function will 260874aeea5SJeff Kirsher * never be concurrently called more than once on the same channel, 261874aeea5SJeff Kirsher * though different channels may be being processed concurrently. 262874aeea5SJeff Kirsher */ 263874aeea5SJeff Kirsher static int efx_process_channel(struct efx_channel *channel, int budget) 264874aeea5SJeff Kirsher { 265c936835cSPeter Dunning struct efx_tx_queue *tx_queue; 266e090bfb9SEdward Cree struct list_head rx_list; 267874aeea5SJeff Kirsher int spent; 268874aeea5SJeff Kirsher 2699f2cb71cSBen Hutchings if (unlikely(!channel->enabled)) 270874aeea5SJeff Kirsher return 0; 271874aeea5SJeff Kirsher 272e090bfb9SEdward Cree /* Prepare the batch receive list */ 273e090bfb9SEdward Cree EFX_WARN_ON_PARANOID(channel->rx_list != NULL); 274e090bfb9SEdward Cree INIT_LIST_HEAD(&rx_list); 275e090bfb9SEdward Cree channel->rx_list = &rx_list; 276e090bfb9SEdward Cree 277c936835cSPeter Dunning efx_for_each_channel_tx_queue(tx_queue, channel) { 278c936835cSPeter Dunning tx_queue->pkts_compl = 0; 279c936835cSPeter Dunning tx_queue->bytes_compl = 0; 280c936835cSPeter Dunning } 281c936835cSPeter Dunning 282874aeea5SJeff Kirsher spent = efx_nic_process_eventq(channel, budget); 283d9ab7007SBen Hutchings if (spent && efx_channel_has_rx_queue(channel)) { 284d9ab7007SBen Hutchings struct efx_rx_queue *rx_queue = 285d9ab7007SBen Hutchings efx_channel_get_rx_queue(channel); 286874aeea5SJeff Kirsher 287ff734ef4SBen Hutchings efx_rx_flush_packet(channel); 288cce28794SJon Cooper efx_fast_push_rx_descriptors(rx_queue, true); 289d9ab7007SBen Hutchings } 290874aeea5SJeff Kirsher 291c936835cSPeter Dunning /* Update BQL */ 292c936835cSPeter Dunning efx_for_each_channel_tx_queue(tx_queue, channel) { 293c936835cSPeter Dunning if (tx_queue->bytes_compl) { 294c936835cSPeter Dunning netdev_tx_completed_queue(tx_queue->core_txq, 295c936835cSPeter Dunning tx_queue->pkts_compl, tx_queue->bytes_compl); 296c936835cSPeter Dunning } 297c936835cSPeter Dunning } 298c936835cSPeter Dunning 299e090bfb9SEdward Cree /* Receive any packets we queued up */ 300e090bfb9SEdward Cree netif_receive_skb_list(channel->rx_list); 301e090bfb9SEdward Cree channel->rx_list = NULL; 302e090bfb9SEdward Cree 303874aeea5SJeff Kirsher return spent; 304874aeea5SJeff Kirsher } 305874aeea5SJeff Kirsher 306874aeea5SJeff Kirsher /* NAPI poll handler 307874aeea5SJeff Kirsher * 308874aeea5SJeff Kirsher * NAPI guarantees serialisation of polls of the same device, which 309874aeea5SJeff Kirsher * provides the guarantee required by efx_process_channel(). 310874aeea5SJeff Kirsher */ 311539de7c5SBert Kenward static void efx_update_irq_mod(struct efx_nic *efx, struct efx_channel *channel) 312539de7c5SBert Kenward { 313539de7c5SBert Kenward int step = efx->irq_mod_step_us; 314539de7c5SBert Kenward 315539de7c5SBert Kenward if (channel->irq_mod_score < irq_adapt_low_thresh) { 316539de7c5SBert Kenward if (channel->irq_moderation_us > step) { 317539de7c5SBert Kenward channel->irq_moderation_us -= step; 318539de7c5SBert Kenward efx->type->push_irq_moderation(channel); 319539de7c5SBert Kenward } 320539de7c5SBert Kenward } else if (channel->irq_mod_score > irq_adapt_high_thresh) { 321539de7c5SBert Kenward if (channel->irq_moderation_us < 322539de7c5SBert Kenward efx->irq_rx_moderation_us) { 323539de7c5SBert Kenward channel->irq_moderation_us += step; 324539de7c5SBert Kenward efx->type->push_irq_moderation(channel); 325539de7c5SBert Kenward } 326539de7c5SBert Kenward } 327539de7c5SBert Kenward 328539de7c5SBert Kenward channel->irq_count = 0; 329539de7c5SBert Kenward channel->irq_mod_score = 0; 330539de7c5SBert Kenward } 331539de7c5SBert Kenward 332874aeea5SJeff Kirsher static int efx_poll(struct napi_struct *napi, int budget) 333874aeea5SJeff Kirsher { 334874aeea5SJeff Kirsher struct efx_channel *channel = 335874aeea5SJeff Kirsher container_of(napi, struct efx_channel, napi_str); 336874aeea5SJeff Kirsher struct efx_nic *efx = channel->efx; 337874aeea5SJeff Kirsher int spent; 338874aeea5SJeff Kirsher 339874aeea5SJeff Kirsher netif_vdbg(efx, intr, efx->net_dev, 340874aeea5SJeff Kirsher "channel %d NAPI poll executing on CPU %d\n", 341874aeea5SJeff Kirsher channel->channel, raw_smp_processor_id()); 342874aeea5SJeff Kirsher 343874aeea5SJeff Kirsher spent = efx_process_channel(channel, budget); 344874aeea5SJeff Kirsher 345eb9a36beSCharles McLachlan xdp_do_flush_map(); 346eb9a36beSCharles McLachlan 347874aeea5SJeff Kirsher if (spent < budget) { 3489d9a6973SBen Hutchings if (efx_channel_has_rx_queue(channel) && 349874aeea5SJeff Kirsher efx->irq_rx_adaptive && 350874aeea5SJeff Kirsher unlikely(++channel->irq_count == 1000)) { 351539de7c5SBert Kenward efx_update_irq_mod(efx, channel); 352874aeea5SJeff Kirsher } 353874aeea5SJeff Kirsher 3543af0f342SEdward Cree #ifdef CONFIG_RFS_ACCEL 3553af0f342SEdward Cree /* Perhaps expire some ARFS filters */ 3563af0f342SEdward Cree schedule_work(&channel->filter_work); 3573af0f342SEdward Cree #endif 358874aeea5SJeff Kirsher 359874aeea5SJeff Kirsher /* There is no race here; although napi_disable() will 360874aeea5SJeff Kirsher * only wait for napi_complete(), this isn't a problem 361514bedbcSBen Hutchings * since efx_nic_eventq_read_ack() will have no effect if 362874aeea5SJeff Kirsher * interrupts have already been disabled. 363874aeea5SJeff Kirsher */ 364f820c0acSBert Kenward if (napi_complete_done(napi, spent)) 365514bedbcSBen Hutchings efx_nic_eventq_read_ack(channel); 366874aeea5SJeff Kirsher } 367874aeea5SJeff Kirsher 368874aeea5SJeff Kirsher return spent; 369874aeea5SJeff Kirsher } 370874aeea5SJeff Kirsher 371874aeea5SJeff Kirsher /* Create event queue 372874aeea5SJeff Kirsher * Event queue memory allocations are done only once. If the channel 373874aeea5SJeff Kirsher * is reset, the memory buffer will be reused; this guards against 374874aeea5SJeff Kirsher * errors during channel reset and also simplifies interrupt handling. 375874aeea5SJeff Kirsher */ 376874aeea5SJeff Kirsher static int efx_probe_eventq(struct efx_channel *channel) 377874aeea5SJeff Kirsher { 378874aeea5SJeff Kirsher struct efx_nic *efx = channel->efx; 379874aeea5SJeff Kirsher unsigned long entries; 380874aeea5SJeff Kirsher 38186ee5302SBen Hutchings netif_dbg(efx, probe, efx->net_dev, 382874aeea5SJeff Kirsher "chan %d create event queue\n", channel->channel); 383874aeea5SJeff Kirsher 384874aeea5SJeff Kirsher /* Build an event queue with room for one event per tx and rx buffer, 385874aeea5SJeff Kirsher * plus some extra for link state events and MCDI completions. */ 386874aeea5SJeff Kirsher entries = roundup_pow_of_two(efx->rxq_entries + efx->txq_entries + 128); 387e01b16a7SEdward Cree EFX_WARN_ON_PARANOID(entries > EFX_MAX_EVQ_SIZE); 388874aeea5SJeff Kirsher channel->eventq_mask = max(entries, EFX_MIN_EVQ_SIZE) - 1; 389874aeea5SJeff Kirsher 390874aeea5SJeff Kirsher return efx_nic_probe_eventq(channel); 391874aeea5SJeff Kirsher } 392874aeea5SJeff Kirsher 393874aeea5SJeff Kirsher /* Prepare channel's event queue */ 394261e4d96SJon Cooper static int efx_init_eventq(struct efx_channel *channel) 395874aeea5SJeff Kirsher { 39615acb1ceSBen Hutchings struct efx_nic *efx = channel->efx; 397261e4d96SJon Cooper int rc; 398261e4d96SJon Cooper 399261e4d96SJon Cooper EFX_WARN_ON_PARANOID(channel->eventq_init); 400261e4d96SJon Cooper 40115acb1ceSBen Hutchings netif_dbg(efx, drv, efx->net_dev, 402874aeea5SJeff Kirsher "chan %d init event queue\n", channel->channel); 403874aeea5SJeff Kirsher 404261e4d96SJon Cooper rc = efx_nic_init_eventq(channel); 405261e4d96SJon Cooper if (rc == 0) { 40615acb1ceSBen Hutchings efx->type->push_irq_moderation(channel); 407874aeea5SJeff Kirsher channel->eventq_read_ptr = 0; 408be3fc09cSBen Hutchings channel->eventq_init = true; 409874aeea5SJeff Kirsher } 410261e4d96SJon Cooper return rc; 411261e4d96SJon Cooper } 412874aeea5SJeff Kirsher 4139f2cb71cSBen Hutchings /* Enable event queue processing and NAPI */ 41436763266SAlexandre Rames void efx_start_eventq(struct efx_channel *channel) 4159f2cb71cSBen Hutchings { 4169f2cb71cSBen Hutchings netif_dbg(channel->efx, ifup, channel->efx->net_dev, 4179f2cb71cSBen Hutchings "chan %d start event queue\n", channel->channel); 4189f2cb71cSBen Hutchings 419514bedbcSBen Hutchings /* Make sure the NAPI handler sees the enabled flag set */ 4209f2cb71cSBen Hutchings channel->enabled = true; 4219f2cb71cSBen Hutchings smp_wmb(); 4229f2cb71cSBen Hutchings 4239f2cb71cSBen Hutchings napi_enable(&channel->napi_str); 4249f2cb71cSBen Hutchings efx_nic_eventq_read_ack(channel); 4259f2cb71cSBen Hutchings } 4269f2cb71cSBen Hutchings 4279f2cb71cSBen Hutchings /* Disable event queue processing and NAPI */ 42836763266SAlexandre Rames void efx_stop_eventq(struct efx_channel *channel) 4299f2cb71cSBen Hutchings { 4309f2cb71cSBen Hutchings if (!channel->enabled) 4319f2cb71cSBen Hutchings return; 4329f2cb71cSBen Hutchings 4339f2cb71cSBen Hutchings napi_disable(&channel->napi_str); 4349f2cb71cSBen Hutchings channel->enabled = false; 4359f2cb71cSBen Hutchings } 4369f2cb71cSBen Hutchings 437874aeea5SJeff Kirsher static void efx_fini_eventq(struct efx_channel *channel) 438874aeea5SJeff Kirsher { 439be3fc09cSBen Hutchings if (!channel->eventq_init) 440be3fc09cSBen Hutchings return; 441be3fc09cSBen Hutchings 442874aeea5SJeff Kirsher netif_dbg(channel->efx, drv, channel->efx->net_dev, 443874aeea5SJeff Kirsher "chan %d fini event queue\n", channel->channel); 444874aeea5SJeff Kirsher 445874aeea5SJeff Kirsher efx_nic_fini_eventq(channel); 446be3fc09cSBen Hutchings channel->eventq_init = false; 447874aeea5SJeff Kirsher } 448874aeea5SJeff Kirsher 449874aeea5SJeff Kirsher static void efx_remove_eventq(struct efx_channel *channel) 450874aeea5SJeff Kirsher { 451874aeea5SJeff Kirsher netif_dbg(channel->efx, drv, channel->efx->net_dev, 452874aeea5SJeff Kirsher "chan %d remove event queue\n", channel->channel); 453874aeea5SJeff Kirsher 454874aeea5SJeff Kirsher efx_nic_remove_eventq(channel); 455874aeea5SJeff Kirsher } 456874aeea5SJeff Kirsher 457874aeea5SJeff Kirsher /************************************************************************** 458874aeea5SJeff Kirsher * 459874aeea5SJeff Kirsher * Channel handling 460874aeea5SJeff Kirsher * 461874aeea5SJeff Kirsher *************************************************************************/ 462874aeea5SJeff Kirsher 4637f967c01SBen Hutchings /* Allocate and initialise a channel structure. */ 464874aeea5SJeff Kirsher static struct efx_channel * 465874aeea5SJeff Kirsher efx_alloc_channel(struct efx_nic *efx, int i, struct efx_channel *old_channel) 466874aeea5SJeff Kirsher { 467874aeea5SJeff Kirsher struct efx_channel *channel; 468874aeea5SJeff Kirsher struct efx_rx_queue *rx_queue; 469874aeea5SJeff Kirsher struct efx_tx_queue *tx_queue; 470874aeea5SJeff Kirsher int j; 471874aeea5SJeff Kirsher 4727f967c01SBen Hutchings channel = kzalloc(sizeof(*channel), GFP_KERNEL); 4737f967c01SBen Hutchings if (!channel) 4747f967c01SBen Hutchings return NULL; 4757f967c01SBen Hutchings 4767f967c01SBen Hutchings channel->efx = efx; 4777f967c01SBen Hutchings channel->channel = i; 4787f967c01SBen Hutchings channel->type = &efx_default_channel_type; 4797f967c01SBen Hutchings 4807f967c01SBen Hutchings for (j = 0; j < EFX_TXQ_TYPES; j++) { 4817f967c01SBen Hutchings tx_queue = &channel->tx_queue[j]; 4827f967c01SBen Hutchings tx_queue->efx = efx; 4837f967c01SBen Hutchings tx_queue->queue = i * EFX_TXQ_TYPES + j; 4847f967c01SBen Hutchings tx_queue->channel = channel; 4857f967c01SBen Hutchings } 4867f967c01SBen Hutchings 4873af0f342SEdward Cree #ifdef CONFIG_RFS_ACCEL 4883af0f342SEdward Cree INIT_WORK(&channel->filter_work, efx_filter_rfs_expire); 4893af0f342SEdward Cree #endif 4903af0f342SEdward Cree 4917f967c01SBen Hutchings rx_queue = &channel->rx_queue; 4927f967c01SBen Hutchings rx_queue->efx = efx; 4937aa1402eSKees Cook timer_setup(&rx_queue->slow_fill, efx_rx_slow_fill, 0); 4947f967c01SBen Hutchings 4957f967c01SBen Hutchings return channel; 4967f967c01SBen Hutchings } 4977f967c01SBen Hutchings 4987f967c01SBen Hutchings /* Allocate and initialise a channel structure, copying parameters 4997f967c01SBen Hutchings * (but not resources) from an old channel structure. 5007f967c01SBen Hutchings */ 5017f967c01SBen Hutchings static struct efx_channel * 5027f967c01SBen Hutchings efx_copy_channel(const struct efx_channel *old_channel) 5037f967c01SBen Hutchings { 5047f967c01SBen Hutchings struct efx_channel *channel; 5057f967c01SBen Hutchings struct efx_rx_queue *rx_queue; 5067f967c01SBen Hutchings struct efx_tx_queue *tx_queue; 5077f967c01SBen Hutchings int j; 5087f967c01SBen Hutchings 509874aeea5SJeff Kirsher channel = kmalloc(sizeof(*channel), GFP_KERNEL); 510874aeea5SJeff Kirsher if (!channel) 511874aeea5SJeff Kirsher return NULL; 512874aeea5SJeff Kirsher 513874aeea5SJeff Kirsher *channel = *old_channel; 514874aeea5SJeff Kirsher 515874aeea5SJeff Kirsher channel->napi_dev = NULL; 51646d054f8SBert Kenward INIT_HLIST_NODE(&channel->napi_str.napi_hash_node); 51746d054f8SBert Kenward channel->napi_str.napi_id = 0; 51846d054f8SBert Kenward channel->napi_str.state = 0; 519874aeea5SJeff Kirsher memset(&channel->eventq, 0, sizeof(channel->eventq)); 520874aeea5SJeff Kirsher 521874aeea5SJeff Kirsher for (j = 0; j < EFX_TXQ_TYPES; j++) { 522874aeea5SJeff Kirsher tx_queue = &channel->tx_queue[j]; 523874aeea5SJeff Kirsher if (tx_queue->channel) 524874aeea5SJeff Kirsher tx_queue->channel = channel; 525874aeea5SJeff Kirsher tx_queue->buffer = NULL; 526874aeea5SJeff Kirsher memset(&tx_queue->txd, 0, sizeof(tx_queue->txd)); 527874aeea5SJeff Kirsher } 528874aeea5SJeff Kirsher 529874aeea5SJeff Kirsher rx_queue = &channel->rx_queue; 5307f967c01SBen Hutchings rx_queue->buffer = NULL; 5317f967c01SBen Hutchings memset(&rx_queue->rxd, 0, sizeof(rx_queue->rxd)); 5327aa1402eSKees Cook timer_setup(&rx_queue->slow_fill, efx_rx_slow_fill, 0); 5333af0f342SEdward Cree #ifdef CONFIG_RFS_ACCEL 5343af0f342SEdward Cree INIT_WORK(&channel->filter_work, efx_filter_rfs_expire); 5353af0f342SEdward Cree #endif 536874aeea5SJeff Kirsher 537874aeea5SJeff Kirsher return channel; 538874aeea5SJeff Kirsher } 539874aeea5SJeff Kirsher 540874aeea5SJeff Kirsher static int efx_probe_channel(struct efx_channel *channel) 541874aeea5SJeff Kirsher { 542874aeea5SJeff Kirsher struct efx_tx_queue *tx_queue; 543874aeea5SJeff Kirsher struct efx_rx_queue *rx_queue; 544874aeea5SJeff Kirsher int rc; 545874aeea5SJeff Kirsher 546874aeea5SJeff Kirsher netif_dbg(channel->efx, probe, channel->efx->net_dev, 547874aeea5SJeff Kirsher "creating channel %d\n", channel->channel); 548874aeea5SJeff Kirsher 5497f967c01SBen Hutchings rc = channel->type->pre_probe(channel); 5507f967c01SBen Hutchings if (rc) 5517f967c01SBen Hutchings goto fail; 5527f967c01SBen Hutchings 553874aeea5SJeff Kirsher rc = efx_probe_eventq(channel); 554874aeea5SJeff Kirsher if (rc) 5557f967c01SBen Hutchings goto fail; 556874aeea5SJeff Kirsher 557874aeea5SJeff Kirsher efx_for_each_channel_tx_queue(tx_queue, channel) { 558874aeea5SJeff Kirsher rc = efx_probe_tx_queue(tx_queue); 559874aeea5SJeff Kirsher if (rc) 5607f967c01SBen Hutchings goto fail; 561874aeea5SJeff Kirsher } 562874aeea5SJeff Kirsher 563874aeea5SJeff Kirsher efx_for_each_channel_rx_queue(rx_queue, channel) { 564874aeea5SJeff Kirsher rc = efx_probe_rx_queue(rx_queue); 565874aeea5SJeff Kirsher if (rc) 5667f967c01SBen Hutchings goto fail; 567874aeea5SJeff Kirsher } 568874aeea5SJeff Kirsher 569e090bfb9SEdward Cree channel->rx_list = NULL; 570e090bfb9SEdward Cree 571874aeea5SJeff Kirsher return 0; 572874aeea5SJeff Kirsher 5737f967c01SBen Hutchings fail: 5747f967c01SBen Hutchings efx_remove_channel(channel); 575874aeea5SJeff Kirsher return rc; 576874aeea5SJeff Kirsher } 577874aeea5SJeff Kirsher 5787f967c01SBen Hutchings static void 5797f967c01SBen Hutchings efx_get_channel_name(struct efx_channel *channel, char *buf, size_t len) 5807f967c01SBen Hutchings { 5817f967c01SBen Hutchings struct efx_nic *efx = channel->efx; 5827f967c01SBen Hutchings const char *type; 5837f967c01SBen Hutchings int number; 5847f967c01SBen Hutchings 5857f967c01SBen Hutchings number = channel->channel; 5867f967c01SBen Hutchings if (efx->tx_channel_offset == 0) { 5877f967c01SBen Hutchings type = ""; 5887f967c01SBen Hutchings } else if (channel->channel < efx->tx_channel_offset) { 5897f967c01SBen Hutchings type = "-rx"; 5907f967c01SBen Hutchings } else { 5917f967c01SBen Hutchings type = "-tx"; 5927f967c01SBen Hutchings number -= efx->tx_channel_offset; 5937f967c01SBen Hutchings } 5947f967c01SBen Hutchings snprintf(buf, len, "%s%s-%d", efx->name, type, number); 5957f967c01SBen Hutchings } 596874aeea5SJeff Kirsher 597874aeea5SJeff Kirsher static void efx_set_channel_names(struct efx_nic *efx) 598874aeea5SJeff Kirsher { 599874aeea5SJeff Kirsher struct efx_channel *channel; 600874aeea5SJeff Kirsher 6017f967c01SBen Hutchings efx_for_each_channel(channel, efx) 6027f967c01SBen Hutchings channel->type->get_name(channel, 603d8291187SBen Hutchings efx->msi_context[channel->channel].name, 604d8291187SBen Hutchings sizeof(efx->msi_context[0].name)); 605874aeea5SJeff Kirsher } 606874aeea5SJeff Kirsher 607874aeea5SJeff Kirsher static int efx_probe_channels(struct efx_nic *efx) 608874aeea5SJeff Kirsher { 609874aeea5SJeff Kirsher struct efx_channel *channel; 610874aeea5SJeff Kirsher int rc; 611874aeea5SJeff Kirsher 612874aeea5SJeff Kirsher /* Restart special buffer allocation */ 613874aeea5SJeff Kirsher efx->next_buffer_table = 0; 614874aeea5SJeff Kirsher 615c92aaff1SBen Hutchings /* Probe channels in reverse, so that any 'extra' channels 616c92aaff1SBen Hutchings * use the start of the buffer table. This allows the traffic 617c92aaff1SBen Hutchings * channels to be resized without moving them or wasting the 618c92aaff1SBen Hutchings * entries before them. 619c92aaff1SBen Hutchings */ 620c92aaff1SBen Hutchings efx_for_each_channel_rev(channel, efx) { 621874aeea5SJeff Kirsher rc = efx_probe_channel(channel); 622874aeea5SJeff Kirsher if (rc) { 623874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 624874aeea5SJeff Kirsher "failed to create channel %d\n", 625874aeea5SJeff Kirsher channel->channel); 626874aeea5SJeff Kirsher goto fail; 627874aeea5SJeff Kirsher } 628874aeea5SJeff Kirsher } 629874aeea5SJeff Kirsher efx_set_channel_names(efx); 630874aeea5SJeff Kirsher 631874aeea5SJeff Kirsher return 0; 632874aeea5SJeff Kirsher 633874aeea5SJeff Kirsher fail: 634874aeea5SJeff Kirsher efx_remove_channels(efx); 635874aeea5SJeff Kirsher return rc; 636874aeea5SJeff Kirsher } 637874aeea5SJeff Kirsher 638874aeea5SJeff Kirsher /* Channels are shutdown and reinitialised whilst the NIC is running 639874aeea5SJeff Kirsher * to propagate configuration changes (mtu, checksum offload), or 640874aeea5SJeff Kirsher * to clear hardware error conditions 641874aeea5SJeff Kirsher */ 6429f2cb71cSBen Hutchings static void efx_start_datapath(struct efx_nic *efx) 643874aeea5SJeff Kirsher { 644ebfcd0fdSAndrew Rybchenko netdev_features_t old_features = efx->net_dev->features; 64585740cdfSBen Hutchings bool old_rx_scatter = efx->rx_scatter; 646874aeea5SJeff Kirsher struct efx_tx_queue *tx_queue; 647874aeea5SJeff Kirsher struct efx_rx_queue *rx_queue; 648874aeea5SJeff Kirsher struct efx_channel *channel; 64985740cdfSBen Hutchings size_t rx_buf_len; 650874aeea5SJeff Kirsher 651874aeea5SJeff Kirsher /* Calculate the rx buffer allocation parameters required to 652874aeea5SJeff Kirsher * support the current MTU, including padding for header 653874aeea5SJeff Kirsher * alignment and overruns. 654874aeea5SJeff Kirsher */ 65543a3739dSJon Cooper efx->rx_dma_len = (efx->rx_prefix_size + 656874aeea5SJeff Kirsher EFX_MAX_FRAME_LEN(efx->net_dev->mtu) + 657874aeea5SJeff Kirsher efx->type->rx_buffer_padding); 658eb9a36beSCharles McLachlan rx_buf_len = (sizeof(struct efx_rx_page_state) + XDP_PACKET_HEADROOM + 6592ec03014SAndrew Rybchenko efx->rx_ip_align + efx->rx_dma_len); 66085740cdfSBen Hutchings if (rx_buf_len <= PAGE_SIZE) { 661e8c68c0aSJon Cooper efx->rx_scatter = efx->type->always_rx_scatter; 66285740cdfSBen Hutchings efx->rx_buffer_order = 0; 66385740cdfSBen Hutchings } else if (efx->type->can_rx_scatter) { 664950c54dfSBen Hutchings BUILD_BUG_ON(EFX_RX_USR_BUF_SIZE % L1_CACHE_BYTES); 66585740cdfSBen Hutchings BUILD_BUG_ON(sizeof(struct efx_rx_page_state) + 666950c54dfSBen Hutchings 2 * ALIGN(NET_IP_ALIGN + EFX_RX_USR_BUF_SIZE, 667950c54dfSBen Hutchings EFX_RX_BUF_ALIGNMENT) > 668950c54dfSBen Hutchings PAGE_SIZE); 66985740cdfSBen Hutchings efx->rx_scatter = true; 67085740cdfSBen Hutchings efx->rx_dma_len = EFX_RX_USR_BUF_SIZE; 67185740cdfSBen Hutchings efx->rx_buffer_order = 0; 67285740cdfSBen Hutchings } else { 67385740cdfSBen Hutchings efx->rx_scatter = false; 67485740cdfSBen Hutchings efx->rx_buffer_order = get_order(rx_buf_len); 67585740cdfSBen Hutchings } 67685740cdfSBen Hutchings 6771648a23fSDaniel Pieczko efx_rx_config_page_split(efx); 6781648a23fSDaniel Pieczko if (efx->rx_buffer_order) 6791648a23fSDaniel Pieczko netif_dbg(efx, drv, efx->net_dev, 6801648a23fSDaniel Pieczko "RX buf len=%u; page order=%u batch=%u\n", 6811648a23fSDaniel Pieczko efx->rx_dma_len, efx->rx_buffer_order, 6821648a23fSDaniel Pieczko efx->rx_pages_per_batch); 6831648a23fSDaniel Pieczko else 6841648a23fSDaniel Pieczko netif_dbg(efx, drv, efx->net_dev, 6851648a23fSDaniel Pieczko "RX buf len=%u step=%u bpp=%u; page batch=%u\n", 6861648a23fSDaniel Pieczko efx->rx_dma_len, efx->rx_page_buf_step, 6871648a23fSDaniel Pieczko efx->rx_bufs_per_page, efx->rx_pages_per_batch); 6882768935aSDaniel Pieczko 689ebfcd0fdSAndrew Rybchenko /* Restore previously fixed features in hw_features and remove 690ebfcd0fdSAndrew Rybchenko * features which are fixed now 691ebfcd0fdSAndrew Rybchenko */ 692ebfcd0fdSAndrew Rybchenko efx->net_dev->hw_features |= efx->net_dev->features; 693ebfcd0fdSAndrew Rybchenko efx->net_dev->hw_features &= ~efx->fixed_features; 694ebfcd0fdSAndrew Rybchenko efx->net_dev->features |= efx->fixed_features; 695ebfcd0fdSAndrew Rybchenko if (efx->net_dev->features != old_features) 696ebfcd0fdSAndrew Rybchenko netdev_features_change(efx->net_dev); 697ebfcd0fdSAndrew Rybchenko 698e8c68c0aSJon Cooper /* RX filters may also have scatter-enabled flags */ 69985740cdfSBen Hutchings if (efx->rx_scatter != old_rx_scatter) 700add72477SBen Hutchings efx->type->filter_update_rx_scatter(efx); 701874aeea5SJeff Kirsher 70214bf718fSBen Hutchings /* We must keep at least one descriptor in a TX ring empty. 70314bf718fSBen Hutchings * We could avoid this when the queue size does not exactly 70414bf718fSBen Hutchings * match the hardware ring size, but it's not that important. 70514bf718fSBen Hutchings * Therefore we stop the queue when one more skb might fill 70614bf718fSBen Hutchings * the ring completely. We wake it when half way back to 70714bf718fSBen Hutchings * empty. 70814bf718fSBen Hutchings */ 70914bf718fSBen Hutchings efx->txq_stop_thresh = efx->txq_entries - efx_tx_max_skb_descs(efx); 71014bf718fSBen Hutchings efx->txq_wake_thresh = efx->txq_stop_thresh / 2; 71114bf718fSBen Hutchings 712874aeea5SJeff Kirsher /* Initialise the channels */ 713874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) { 7143881d8abSAlexandre Rames efx_for_each_channel_tx_queue(tx_queue, channel) { 715874aeea5SJeff Kirsher efx_init_tx_queue(tx_queue); 7163881d8abSAlexandre Rames atomic_inc(&efx->active_queues); 7173881d8abSAlexandre Rames } 718874aeea5SJeff Kirsher 7199f2cb71cSBen Hutchings efx_for_each_channel_rx_queue(rx_queue, channel) { 720874aeea5SJeff Kirsher efx_init_rx_queue(rx_queue); 7213881d8abSAlexandre Rames atomic_inc(&efx->active_queues); 722cce28794SJon Cooper efx_stop_eventq(channel); 723cce28794SJon Cooper efx_fast_push_rx_descriptors(rx_queue, false); 724cce28794SJon Cooper efx_start_eventq(channel); 7259f2cb71cSBen Hutchings } 726874aeea5SJeff Kirsher 72785740cdfSBen Hutchings WARN_ON(channel->rx_pkt_n_frags); 728874aeea5SJeff Kirsher } 7299f2cb71cSBen Hutchings 7302ea4dc28SAlexandre Rames efx_ptp_start_datapath(efx); 7312ea4dc28SAlexandre Rames 7329f2cb71cSBen Hutchings if (netif_device_present(efx->net_dev)) 7339f2cb71cSBen Hutchings netif_tx_wake_all_queues(efx->net_dev); 734874aeea5SJeff Kirsher } 735874aeea5SJeff Kirsher 7369f2cb71cSBen Hutchings static void efx_stop_datapath(struct efx_nic *efx) 737874aeea5SJeff Kirsher { 738874aeea5SJeff Kirsher struct efx_channel *channel; 739874aeea5SJeff Kirsher struct efx_tx_queue *tx_queue; 740874aeea5SJeff Kirsher struct efx_rx_queue *rx_queue; 741874aeea5SJeff Kirsher int rc; 742874aeea5SJeff Kirsher 743874aeea5SJeff Kirsher EFX_ASSERT_RESET_SERIALISED(efx); 744874aeea5SJeff Kirsher BUG_ON(efx->port_enabled); 745874aeea5SJeff Kirsher 7462ea4dc28SAlexandre Rames efx_ptp_stop_datapath(efx); 7472ea4dc28SAlexandre Rames 748d8aec745SBen Hutchings /* Stop RX refill */ 749d8aec745SBen Hutchings efx_for_each_channel(channel, efx) { 750d8aec745SBen Hutchings efx_for_each_channel_rx_queue(rx_queue, channel) 751d8aec745SBen Hutchings rx_queue->refill_enabled = false; 752d8aec745SBen Hutchings } 753d8aec745SBen Hutchings 754874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) { 7559f2cb71cSBen Hutchings /* RX packet processing is pipelined, so wait for the 7569f2cb71cSBen Hutchings * NAPI handler to complete. At least event queue 0 7579f2cb71cSBen Hutchings * might be kept active by non-data events, so don't 7589f2cb71cSBen Hutchings * use napi_synchronize() but actually disable NAPI 7599f2cb71cSBen Hutchings * temporarily. 7609f2cb71cSBen Hutchings */ 7619f2cb71cSBen Hutchings if (efx_channel_has_rx_queue(channel)) { 7629f2cb71cSBen Hutchings efx_stop_eventq(channel); 7639f2cb71cSBen Hutchings efx_start_eventq(channel); 7649f2cb71cSBen Hutchings } 765e42c3d85SBen Hutchings } 766874aeea5SJeff Kirsher 767e42c3d85SBen Hutchings rc = efx->type->fini_dmaq(efx); 7685a6681e2SEdward Cree if (rc) { 769e42c3d85SBen Hutchings netif_err(efx, drv, efx->net_dev, "failed to flush queues\n"); 770e42c3d85SBen Hutchings } else { 771e42c3d85SBen Hutchings netif_dbg(efx, drv, efx->net_dev, 772e42c3d85SBen Hutchings "successfully flushed all queues\n"); 773e42c3d85SBen Hutchings } 774e42c3d85SBen Hutchings 775e42c3d85SBen Hutchings efx_for_each_channel(channel, efx) { 776874aeea5SJeff Kirsher efx_for_each_channel_rx_queue(rx_queue, channel) 777874aeea5SJeff Kirsher efx_fini_rx_queue(rx_queue); 778874aeea5SJeff Kirsher efx_for_each_possible_channel_tx_queue(tx_queue, channel) 779874aeea5SJeff Kirsher efx_fini_tx_queue(tx_queue); 780874aeea5SJeff Kirsher } 781eb9a36beSCharles McLachlan efx->xdp_rxq_info_failed = false; 782874aeea5SJeff Kirsher } 783874aeea5SJeff Kirsher 784874aeea5SJeff Kirsher static void efx_remove_channel(struct efx_channel *channel) 785874aeea5SJeff Kirsher { 786874aeea5SJeff Kirsher struct efx_tx_queue *tx_queue; 787874aeea5SJeff Kirsher struct efx_rx_queue *rx_queue; 788874aeea5SJeff Kirsher 789874aeea5SJeff Kirsher netif_dbg(channel->efx, drv, channel->efx->net_dev, 790874aeea5SJeff Kirsher "destroy chan %d\n", channel->channel); 791874aeea5SJeff Kirsher 792874aeea5SJeff Kirsher efx_for_each_channel_rx_queue(rx_queue, channel) 793874aeea5SJeff Kirsher efx_remove_rx_queue(rx_queue); 794874aeea5SJeff Kirsher efx_for_each_possible_channel_tx_queue(tx_queue, channel) 795874aeea5SJeff Kirsher efx_remove_tx_queue(tx_queue); 796874aeea5SJeff Kirsher efx_remove_eventq(channel); 797c31e5f9fSStuart Hodgson channel->type->post_remove(channel); 798874aeea5SJeff Kirsher } 799874aeea5SJeff Kirsher 800874aeea5SJeff Kirsher static void efx_remove_channels(struct efx_nic *efx) 801874aeea5SJeff Kirsher { 802874aeea5SJeff Kirsher struct efx_channel *channel; 803874aeea5SJeff Kirsher 804874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) 805874aeea5SJeff Kirsher efx_remove_channel(channel); 806874aeea5SJeff Kirsher } 807874aeea5SJeff Kirsher 808874aeea5SJeff Kirsher int 809874aeea5SJeff Kirsher efx_realloc_channels(struct efx_nic *efx, u32 rxq_entries, u32 txq_entries) 810874aeea5SJeff Kirsher { 811874aeea5SJeff Kirsher struct efx_channel *other_channel[EFX_MAX_CHANNELS], *channel; 812874aeea5SJeff Kirsher u32 old_rxq_entries, old_txq_entries; 8137f967c01SBen Hutchings unsigned i, next_buffer_table = 0; 814261e4d96SJon Cooper int rc, rc2; 8158b7325b4SBen Hutchings 8168b7325b4SBen Hutchings rc = efx_check_disabled(efx); 8178b7325b4SBen Hutchings if (rc) 8188b7325b4SBen Hutchings return rc; 8197f967c01SBen Hutchings 8207f967c01SBen Hutchings /* Not all channels should be reallocated. We must avoid 8217f967c01SBen Hutchings * reallocating their buffer table entries. 8227f967c01SBen Hutchings */ 8237f967c01SBen Hutchings efx_for_each_channel(channel, efx) { 8247f967c01SBen Hutchings struct efx_rx_queue *rx_queue; 8257f967c01SBen Hutchings struct efx_tx_queue *tx_queue; 8267f967c01SBen Hutchings 8277f967c01SBen Hutchings if (channel->type->copy) 8287f967c01SBen Hutchings continue; 8297f967c01SBen Hutchings next_buffer_table = max(next_buffer_table, 8307f967c01SBen Hutchings channel->eventq.index + 8317f967c01SBen Hutchings channel->eventq.entries); 8327f967c01SBen Hutchings efx_for_each_channel_rx_queue(rx_queue, channel) 8337f967c01SBen Hutchings next_buffer_table = max(next_buffer_table, 8347f967c01SBen Hutchings rx_queue->rxd.index + 8357f967c01SBen Hutchings rx_queue->rxd.entries); 8367f967c01SBen Hutchings efx_for_each_channel_tx_queue(tx_queue, channel) 8377f967c01SBen Hutchings next_buffer_table = max(next_buffer_table, 8387f967c01SBen Hutchings tx_queue->txd.index + 8397f967c01SBen Hutchings tx_queue->txd.entries); 8407f967c01SBen Hutchings } 841874aeea5SJeff Kirsher 84229c69a48SBen Hutchings efx_device_detach_sync(efx); 843874aeea5SJeff Kirsher efx_stop_all(efx); 844d8291187SBen Hutchings efx_soft_disable_interrupts(efx); 845874aeea5SJeff Kirsher 8467f967c01SBen Hutchings /* Clone channels (where possible) */ 847874aeea5SJeff Kirsher memset(other_channel, 0, sizeof(other_channel)); 848874aeea5SJeff Kirsher for (i = 0; i < efx->n_channels; i++) { 8497f967c01SBen Hutchings channel = efx->channel[i]; 8507f967c01SBen Hutchings if (channel->type->copy) 8517f967c01SBen Hutchings channel = channel->type->copy(channel); 852874aeea5SJeff Kirsher if (!channel) { 853874aeea5SJeff Kirsher rc = -ENOMEM; 854874aeea5SJeff Kirsher goto out; 855874aeea5SJeff Kirsher } 856874aeea5SJeff Kirsher other_channel[i] = channel; 857874aeea5SJeff Kirsher } 858874aeea5SJeff Kirsher 859874aeea5SJeff Kirsher /* Swap entry counts and channel pointers */ 860874aeea5SJeff Kirsher old_rxq_entries = efx->rxq_entries; 861874aeea5SJeff Kirsher old_txq_entries = efx->txq_entries; 862874aeea5SJeff Kirsher efx->rxq_entries = rxq_entries; 863874aeea5SJeff Kirsher efx->txq_entries = txq_entries; 864874aeea5SJeff Kirsher for (i = 0; i < efx->n_channels; i++) { 865874aeea5SJeff Kirsher channel = efx->channel[i]; 866874aeea5SJeff Kirsher efx->channel[i] = other_channel[i]; 867874aeea5SJeff Kirsher other_channel[i] = channel; 868874aeea5SJeff Kirsher } 869874aeea5SJeff Kirsher 8707f967c01SBen Hutchings /* Restart buffer table allocation */ 8717f967c01SBen Hutchings efx->next_buffer_table = next_buffer_table; 8727f967c01SBen Hutchings 8737f967c01SBen Hutchings for (i = 0; i < efx->n_channels; i++) { 8747f967c01SBen Hutchings channel = efx->channel[i]; 8757f967c01SBen Hutchings if (!channel->type->copy) 8767f967c01SBen Hutchings continue; 8777f967c01SBen Hutchings rc = efx_probe_channel(channel); 878874aeea5SJeff Kirsher if (rc) 879874aeea5SJeff Kirsher goto rollback; 8807f967c01SBen Hutchings efx_init_napi_channel(efx->channel[i]); 881874aeea5SJeff Kirsher } 882874aeea5SJeff Kirsher 8837f967c01SBen Hutchings out: 8847f967c01SBen Hutchings /* Destroy unused channel structures */ 8857f967c01SBen Hutchings for (i = 0; i < efx->n_channels; i++) { 8867f967c01SBen Hutchings channel = other_channel[i]; 8877f967c01SBen Hutchings if (channel && channel->type->copy) { 8887f967c01SBen Hutchings efx_fini_napi_channel(channel); 8897f967c01SBen Hutchings efx_remove_channel(channel); 8907f967c01SBen Hutchings kfree(channel); 8917f967c01SBen Hutchings } 8927f967c01SBen Hutchings } 8937f967c01SBen Hutchings 894261e4d96SJon Cooper rc2 = efx_soft_enable_interrupts(efx); 895261e4d96SJon Cooper if (rc2) { 896261e4d96SJon Cooper rc = rc ? rc : rc2; 897261e4d96SJon Cooper netif_err(efx, drv, efx->net_dev, 898261e4d96SJon Cooper "unable to restart interrupts on channel reallocation\n"); 899261e4d96SJon Cooper efx_schedule_reset(efx, RESET_TYPE_DISABLE); 900261e4d96SJon Cooper } else { 901874aeea5SJeff Kirsher efx_start_all(efx); 9029c568fd8SPeter Dunning efx_device_attach_if_not_resetting(efx); 903261e4d96SJon Cooper } 904874aeea5SJeff Kirsher return rc; 905874aeea5SJeff Kirsher 906874aeea5SJeff Kirsher rollback: 907874aeea5SJeff Kirsher /* Swap back */ 908874aeea5SJeff Kirsher efx->rxq_entries = old_rxq_entries; 909874aeea5SJeff Kirsher efx->txq_entries = old_txq_entries; 910874aeea5SJeff Kirsher for (i = 0; i < efx->n_channels; i++) { 911874aeea5SJeff Kirsher channel = efx->channel[i]; 912874aeea5SJeff Kirsher efx->channel[i] = other_channel[i]; 913874aeea5SJeff Kirsher other_channel[i] = channel; 914874aeea5SJeff Kirsher } 915874aeea5SJeff Kirsher goto out; 916874aeea5SJeff Kirsher } 917874aeea5SJeff Kirsher 918874aeea5SJeff Kirsher void efx_schedule_slow_fill(struct efx_rx_queue *rx_queue) 919874aeea5SJeff Kirsher { 92050f444aaSRobert Stonehouse mod_timer(&rx_queue->slow_fill, jiffies + msecs_to_jiffies(10)); 921874aeea5SJeff Kirsher } 922874aeea5SJeff Kirsher 923e7345ba3Skbuild test robot static bool efx_default_channel_want_txqs(struct efx_channel *channel) 9242935e3c3SEdward Cree { 9252935e3c3SEdward Cree return channel->channel - channel->efx->tx_channel_offset < 9262935e3c3SEdward Cree channel->efx->n_tx_channels; 9272935e3c3SEdward Cree } 9282935e3c3SEdward Cree 9297f967c01SBen Hutchings static const struct efx_channel_type efx_default_channel_type = { 9307f967c01SBen Hutchings .pre_probe = efx_channel_dummy_op_int, 931c31e5f9fSStuart Hodgson .post_remove = efx_channel_dummy_op_void, 9327f967c01SBen Hutchings .get_name = efx_get_channel_name, 9337f967c01SBen Hutchings .copy = efx_copy_channel, 9342935e3c3SEdward Cree .want_txqs = efx_default_channel_want_txqs, 9357f967c01SBen Hutchings .keep_eventq = false, 9362935e3c3SEdward Cree .want_pio = true, 9377f967c01SBen Hutchings }; 9387f967c01SBen Hutchings 9397f967c01SBen Hutchings int efx_channel_dummy_op_int(struct efx_channel *channel) 9407f967c01SBen Hutchings { 9417f967c01SBen Hutchings return 0; 9427f967c01SBen Hutchings } 9437f967c01SBen Hutchings 944c31e5f9fSStuart Hodgson void efx_channel_dummy_op_void(struct efx_channel *channel) 945c31e5f9fSStuart Hodgson { 946c31e5f9fSStuart Hodgson } 947c31e5f9fSStuart Hodgson 948874aeea5SJeff Kirsher /************************************************************************** 949874aeea5SJeff Kirsher * 950874aeea5SJeff Kirsher * Port handling 951874aeea5SJeff Kirsher * 952874aeea5SJeff Kirsher **************************************************************************/ 953874aeea5SJeff Kirsher 954874aeea5SJeff Kirsher /* This ensures that the kernel is kept informed (via 955874aeea5SJeff Kirsher * netif_carrier_on/off) of the link status, and also maintains the 956874aeea5SJeff Kirsher * link status's stop on the port's TX queue. 957874aeea5SJeff Kirsher */ 958874aeea5SJeff Kirsher void efx_link_status_changed(struct efx_nic *efx) 959874aeea5SJeff Kirsher { 960874aeea5SJeff Kirsher struct efx_link_state *link_state = &efx->link_state; 961874aeea5SJeff Kirsher 962874aeea5SJeff Kirsher /* SFC Bug 5356: A net_dev notifier is registered, so we must ensure 963874aeea5SJeff Kirsher * that no events are triggered between unregister_netdev() and the 964874aeea5SJeff Kirsher * driver unloading. A more general condition is that NETDEV_CHANGE 965874aeea5SJeff Kirsher * can only be generated between NETDEV_UP and NETDEV_DOWN */ 966874aeea5SJeff Kirsher if (!netif_running(efx->net_dev)) 967874aeea5SJeff Kirsher return; 968874aeea5SJeff Kirsher 969874aeea5SJeff Kirsher if (link_state->up != netif_carrier_ok(efx->net_dev)) { 970874aeea5SJeff Kirsher efx->n_link_state_changes++; 971874aeea5SJeff Kirsher 972874aeea5SJeff Kirsher if (link_state->up) 973874aeea5SJeff Kirsher netif_carrier_on(efx->net_dev); 974874aeea5SJeff Kirsher else 975874aeea5SJeff Kirsher netif_carrier_off(efx->net_dev); 976874aeea5SJeff Kirsher } 977874aeea5SJeff Kirsher 978874aeea5SJeff Kirsher /* Status message for kernel log */ 9792aa9ef11SBen Hutchings if (link_state->up) 980874aeea5SJeff Kirsher netif_info(efx, link, efx->net_dev, 981964e6135SBen Hutchings "link up at %uMbps %s-duplex (MTU %d)\n", 982874aeea5SJeff Kirsher link_state->speed, link_state->fd ? "full" : "half", 983964e6135SBen Hutchings efx->net_dev->mtu); 9842aa9ef11SBen Hutchings else 985874aeea5SJeff Kirsher netif_info(efx, link, efx->net_dev, "link down\n"); 986874aeea5SJeff Kirsher } 987874aeea5SJeff Kirsher 988c2ab85d2SEdward Cree void efx_link_set_advertising(struct efx_nic *efx, 989c2ab85d2SEdward Cree const unsigned long *advertising) 990874aeea5SJeff Kirsher { 991c2ab85d2SEdward Cree memcpy(efx->link_advertising, advertising, 992c2ab85d2SEdward Cree sizeof(__ETHTOOL_DECLARE_LINK_MODE_MASK())); 993c2ab85d2SEdward Cree 994c2ab85d2SEdward Cree efx->link_advertising[0] |= ADVERTISED_Autoneg; 995c2ab85d2SEdward Cree if (advertising[0] & ADVERTISED_Pause) 996874aeea5SJeff Kirsher efx->wanted_fc |= (EFX_FC_TX | EFX_FC_RX); 997874aeea5SJeff Kirsher else 998874aeea5SJeff Kirsher efx->wanted_fc &= ~(EFX_FC_TX | EFX_FC_RX); 999c2ab85d2SEdward Cree if (advertising[0] & ADVERTISED_Asym_Pause) 1000874aeea5SJeff Kirsher efx->wanted_fc ^= EFX_FC_TX; 1001874aeea5SJeff Kirsher } 1002c2ab85d2SEdward Cree 1003c2ab85d2SEdward Cree /* Equivalent to efx_link_set_advertising with all-zeroes, except does not 1004c2ab85d2SEdward Cree * force the Autoneg bit on. 1005c2ab85d2SEdward Cree */ 1006c2ab85d2SEdward Cree void efx_link_clear_advertising(struct efx_nic *efx) 1007c2ab85d2SEdward Cree { 1008c2ab85d2SEdward Cree bitmap_zero(efx->link_advertising, __ETHTOOL_LINK_MODE_MASK_NBITS); 1009c2ab85d2SEdward Cree efx->wanted_fc &= ~(EFX_FC_TX | EFX_FC_RX); 1010874aeea5SJeff Kirsher } 1011874aeea5SJeff Kirsher 1012874aeea5SJeff Kirsher void efx_link_set_wanted_fc(struct efx_nic *efx, u8 wanted_fc) 1013874aeea5SJeff Kirsher { 1014874aeea5SJeff Kirsher efx->wanted_fc = wanted_fc; 1015c2ab85d2SEdward Cree if (efx->link_advertising[0]) { 1016874aeea5SJeff Kirsher if (wanted_fc & EFX_FC_RX) 1017c2ab85d2SEdward Cree efx->link_advertising[0] |= (ADVERTISED_Pause | 1018874aeea5SJeff Kirsher ADVERTISED_Asym_Pause); 1019874aeea5SJeff Kirsher else 1020c2ab85d2SEdward Cree efx->link_advertising[0] &= ~(ADVERTISED_Pause | 1021874aeea5SJeff Kirsher ADVERTISED_Asym_Pause); 1022874aeea5SJeff Kirsher if (wanted_fc & EFX_FC_TX) 1023c2ab85d2SEdward Cree efx->link_advertising[0] ^= ADVERTISED_Asym_Pause; 1024874aeea5SJeff Kirsher } 1025874aeea5SJeff Kirsher } 1026874aeea5SJeff Kirsher 1027874aeea5SJeff Kirsher static void efx_fini_port(struct efx_nic *efx); 1028874aeea5SJeff Kirsher 10290d322413SEdward Cree /* We assume that efx->type->reconfigure_mac will always try to sync RX 10300d322413SEdward Cree * filters and therefore needs to read-lock the filter table against freeing 10310d322413SEdward Cree */ 10320d322413SEdward Cree void efx_mac_reconfigure(struct efx_nic *efx) 10330d322413SEdward Cree { 10340d322413SEdward Cree down_read(&efx->filter_sem); 10350d322413SEdward Cree efx->type->reconfigure_mac(efx); 10360d322413SEdward Cree up_read(&efx->filter_sem); 10370d322413SEdward Cree } 10380d322413SEdward Cree 1039874aeea5SJeff Kirsher /* Push loopback/power/transmit disable settings to the PHY, and reconfigure 1040874aeea5SJeff Kirsher * the MAC appropriately. All other PHY configuration changes are pushed 1041874aeea5SJeff Kirsher * through phy_op->set_settings(), and pushed asynchronously to the MAC 1042874aeea5SJeff Kirsher * through efx_monitor(). 1043874aeea5SJeff Kirsher * 1044874aeea5SJeff Kirsher * Callers must hold the mac_lock 1045874aeea5SJeff Kirsher */ 1046874aeea5SJeff Kirsher int __efx_reconfigure_port(struct efx_nic *efx) 1047874aeea5SJeff Kirsher { 1048874aeea5SJeff Kirsher enum efx_phy_mode phy_mode; 1049874aeea5SJeff Kirsher int rc; 1050874aeea5SJeff Kirsher 1051874aeea5SJeff Kirsher WARN_ON(!mutex_is_locked(&efx->mac_lock)); 1052874aeea5SJeff Kirsher 1053874aeea5SJeff Kirsher /* Disable PHY transmit in mac level loopbacks */ 1054874aeea5SJeff Kirsher phy_mode = efx->phy_mode; 1055874aeea5SJeff Kirsher if (LOOPBACK_INTERNAL(efx)) 1056874aeea5SJeff Kirsher efx->phy_mode |= PHY_MODE_TX_DISABLED; 1057874aeea5SJeff Kirsher else 1058874aeea5SJeff Kirsher efx->phy_mode &= ~PHY_MODE_TX_DISABLED; 1059874aeea5SJeff Kirsher 1060874aeea5SJeff Kirsher rc = efx->type->reconfigure_port(efx); 1061874aeea5SJeff Kirsher 1062874aeea5SJeff Kirsher if (rc) 1063874aeea5SJeff Kirsher efx->phy_mode = phy_mode; 1064874aeea5SJeff Kirsher 1065874aeea5SJeff Kirsher return rc; 1066874aeea5SJeff Kirsher } 1067874aeea5SJeff Kirsher 1068874aeea5SJeff Kirsher /* Reinitialise the MAC to pick up new PHY settings, even if the port is 1069874aeea5SJeff Kirsher * disabled. */ 1070874aeea5SJeff Kirsher int efx_reconfigure_port(struct efx_nic *efx) 1071874aeea5SJeff Kirsher { 1072874aeea5SJeff Kirsher int rc; 1073874aeea5SJeff Kirsher 1074874aeea5SJeff Kirsher EFX_ASSERT_RESET_SERIALISED(efx); 1075874aeea5SJeff Kirsher 1076874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 1077874aeea5SJeff Kirsher rc = __efx_reconfigure_port(efx); 1078874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 1079874aeea5SJeff Kirsher 1080874aeea5SJeff Kirsher return rc; 1081874aeea5SJeff Kirsher } 1082874aeea5SJeff Kirsher 1083874aeea5SJeff Kirsher /* Asynchronous work item for changing MAC promiscuity and multicast 1084874aeea5SJeff Kirsher * hash. Avoid a drain/rx_ingress enable by reconfiguring the current 1085874aeea5SJeff Kirsher * MAC directly. */ 1086874aeea5SJeff Kirsher static void efx_mac_work(struct work_struct *data) 1087874aeea5SJeff Kirsher { 1088874aeea5SJeff Kirsher struct efx_nic *efx = container_of(data, struct efx_nic, mac_work); 1089874aeea5SJeff Kirsher 1090874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 109130b81cdaSBen Hutchings if (efx->port_enabled) 10920d322413SEdward Cree efx_mac_reconfigure(efx); 1093874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 1094874aeea5SJeff Kirsher } 1095874aeea5SJeff Kirsher 1096874aeea5SJeff Kirsher static int efx_probe_port(struct efx_nic *efx) 1097874aeea5SJeff Kirsher { 1098874aeea5SJeff Kirsher int rc; 1099874aeea5SJeff Kirsher 1100874aeea5SJeff Kirsher netif_dbg(efx, probe, efx->net_dev, "create port\n"); 1101874aeea5SJeff Kirsher 1102874aeea5SJeff Kirsher if (phy_flash_cfg) 1103874aeea5SJeff Kirsher efx->phy_mode = PHY_MODE_SPECIAL; 1104874aeea5SJeff Kirsher 1105874aeea5SJeff Kirsher /* Connect up MAC/PHY operations table */ 1106874aeea5SJeff Kirsher rc = efx->type->probe_port(efx); 1107874aeea5SJeff Kirsher if (rc) 1108874aeea5SJeff Kirsher return rc; 1109874aeea5SJeff Kirsher 1110e332bcb3SBen Hutchings /* Initialise MAC address to permanent address */ 1111cd84ff4dSEdward Cree ether_addr_copy(efx->net_dev->dev_addr, efx->net_dev->perm_addr); 1112874aeea5SJeff Kirsher 1113874aeea5SJeff Kirsher return 0; 1114874aeea5SJeff Kirsher } 1115874aeea5SJeff Kirsher 1116874aeea5SJeff Kirsher static int efx_init_port(struct efx_nic *efx) 1117874aeea5SJeff Kirsher { 1118874aeea5SJeff Kirsher int rc; 1119874aeea5SJeff Kirsher 1120874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "init port\n"); 1121874aeea5SJeff Kirsher 1122874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 1123874aeea5SJeff Kirsher 1124874aeea5SJeff Kirsher rc = efx->phy_op->init(efx); 1125874aeea5SJeff Kirsher if (rc) 1126874aeea5SJeff Kirsher goto fail1; 1127874aeea5SJeff Kirsher 1128874aeea5SJeff Kirsher efx->port_initialized = true; 1129874aeea5SJeff Kirsher 1130874aeea5SJeff Kirsher /* Reconfigure the MAC before creating dma queues (required for 1131874aeea5SJeff Kirsher * Falcon/A1 where RX_INGR_EN/TX_DRAIN_EN isn't supported) */ 11320d322413SEdward Cree efx_mac_reconfigure(efx); 1133874aeea5SJeff Kirsher 1134874aeea5SJeff Kirsher /* Ensure the PHY advertises the correct flow control settings */ 1135874aeea5SJeff Kirsher rc = efx->phy_op->reconfigure(efx); 1136267d9d73SEdward Cree if (rc && rc != -EPERM) 1137874aeea5SJeff Kirsher goto fail2; 1138874aeea5SJeff Kirsher 1139874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 1140874aeea5SJeff Kirsher return 0; 1141874aeea5SJeff Kirsher 1142874aeea5SJeff Kirsher fail2: 1143874aeea5SJeff Kirsher efx->phy_op->fini(efx); 1144874aeea5SJeff Kirsher fail1: 1145874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 1146874aeea5SJeff Kirsher return rc; 1147874aeea5SJeff Kirsher } 1148874aeea5SJeff Kirsher 1149874aeea5SJeff Kirsher static void efx_start_port(struct efx_nic *efx) 1150874aeea5SJeff Kirsher { 1151874aeea5SJeff Kirsher netif_dbg(efx, ifup, efx->net_dev, "start port\n"); 1152874aeea5SJeff Kirsher BUG_ON(efx->port_enabled); 1153874aeea5SJeff Kirsher 1154874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 1155874aeea5SJeff Kirsher efx->port_enabled = true; 1156874aeea5SJeff Kirsher 1157d615c039SBen Hutchings /* Ensure MAC ingress/egress is enabled */ 11580d322413SEdward Cree efx_mac_reconfigure(efx); 1159874aeea5SJeff Kirsher 1160874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 1161874aeea5SJeff Kirsher } 1162874aeea5SJeff Kirsher 1163d615c039SBen Hutchings /* Cancel work for MAC reconfiguration, periodic hardware monitoring 1164d615c039SBen Hutchings * and the async self-test, wait for them to finish and prevent them 1165d615c039SBen Hutchings * being scheduled again. This doesn't cover online resets, which 1166d615c039SBen Hutchings * should only be cancelled when removing the device. 1167d615c039SBen Hutchings */ 1168874aeea5SJeff Kirsher static void efx_stop_port(struct efx_nic *efx) 1169874aeea5SJeff Kirsher { 1170874aeea5SJeff Kirsher netif_dbg(efx, ifdown, efx->net_dev, "stop port\n"); 1171874aeea5SJeff Kirsher 1172d615c039SBen Hutchings EFX_ASSERT_RESET_SERIALISED(efx); 1173d615c039SBen Hutchings 1174874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 1175874aeea5SJeff Kirsher efx->port_enabled = false; 1176874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 1177874aeea5SJeff Kirsher 1178874aeea5SJeff Kirsher /* Serialise against efx_set_multicast_list() */ 1179874aeea5SJeff Kirsher netif_addr_lock_bh(efx->net_dev); 1180874aeea5SJeff Kirsher netif_addr_unlock_bh(efx->net_dev); 1181d615c039SBen Hutchings 1182d615c039SBen Hutchings cancel_delayed_work_sync(&efx->monitor_work); 1183d615c039SBen Hutchings efx_selftest_async_cancel(efx); 1184d615c039SBen Hutchings cancel_work_sync(&efx->mac_work); 1185874aeea5SJeff Kirsher } 1186874aeea5SJeff Kirsher 1187874aeea5SJeff Kirsher static void efx_fini_port(struct efx_nic *efx) 1188874aeea5SJeff Kirsher { 1189874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "shut down port\n"); 1190874aeea5SJeff Kirsher 1191874aeea5SJeff Kirsher if (!efx->port_initialized) 1192874aeea5SJeff Kirsher return; 1193874aeea5SJeff Kirsher 1194874aeea5SJeff Kirsher efx->phy_op->fini(efx); 1195874aeea5SJeff Kirsher efx->port_initialized = false; 1196874aeea5SJeff Kirsher 1197874aeea5SJeff Kirsher efx->link_state.up = false; 1198874aeea5SJeff Kirsher efx_link_status_changed(efx); 1199874aeea5SJeff Kirsher } 1200874aeea5SJeff Kirsher 1201874aeea5SJeff Kirsher static void efx_remove_port(struct efx_nic *efx) 1202874aeea5SJeff Kirsher { 1203874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "destroying port\n"); 1204874aeea5SJeff Kirsher 1205874aeea5SJeff Kirsher efx->type->remove_port(efx); 1206874aeea5SJeff Kirsher } 1207874aeea5SJeff Kirsher 1208874aeea5SJeff Kirsher /************************************************************************** 1209874aeea5SJeff Kirsher * 1210874aeea5SJeff Kirsher * NIC handling 1211874aeea5SJeff Kirsher * 1212874aeea5SJeff Kirsher **************************************************************************/ 1213874aeea5SJeff Kirsher 12140bcf4a64SBen Hutchings static LIST_HEAD(efx_primary_list); 12150bcf4a64SBen Hutchings static LIST_HEAD(efx_unassociated_list); 12160bcf4a64SBen Hutchings 12170bcf4a64SBen Hutchings static bool efx_same_controller(struct efx_nic *left, struct efx_nic *right) 12180bcf4a64SBen Hutchings { 12190bcf4a64SBen Hutchings return left->type == right->type && 12200bcf4a64SBen Hutchings left->vpd_sn && right->vpd_sn && 12210bcf4a64SBen Hutchings !strcmp(left->vpd_sn, right->vpd_sn); 12220bcf4a64SBen Hutchings } 12230bcf4a64SBen Hutchings 12240bcf4a64SBen Hutchings static void efx_associate(struct efx_nic *efx) 12250bcf4a64SBen Hutchings { 12260bcf4a64SBen Hutchings struct efx_nic *other, *next; 12270bcf4a64SBen Hutchings 12280bcf4a64SBen Hutchings if (efx->primary == efx) { 12290bcf4a64SBen Hutchings /* Adding primary function; look for secondaries */ 12300bcf4a64SBen Hutchings 12310bcf4a64SBen Hutchings netif_dbg(efx, probe, efx->net_dev, "adding to primary list\n"); 12320bcf4a64SBen Hutchings list_add_tail(&efx->node, &efx_primary_list); 12330bcf4a64SBen Hutchings 12340bcf4a64SBen Hutchings list_for_each_entry_safe(other, next, &efx_unassociated_list, 12350bcf4a64SBen Hutchings node) { 12360bcf4a64SBen Hutchings if (efx_same_controller(efx, other)) { 12370bcf4a64SBen Hutchings list_del(&other->node); 12380bcf4a64SBen Hutchings netif_dbg(other, probe, other->net_dev, 12390bcf4a64SBen Hutchings "moving to secondary list of %s %s\n", 12400bcf4a64SBen Hutchings pci_name(efx->pci_dev), 12410bcf4a64SBen Hutchings efx->net_dev->name); 12420bcf4a64SBen Hutchings list_add_tail(&other->node, 12430bcf4a64SBen Hutchings &efx->secondary_list); 12440bcf4a64SBen Hutchings other->primary = efx; 12450bcf4a64SBen Hutchings } 12460bcf4a64SBen Hutchings } 12470bcf4a64SBen Hutchings } else { 12480bcf4a64SBen Hutchings /* Adding secondary function; look for primary */ 12490bcf4a64SBen Hutchings 12500bcf4a64SBen Hutchings list_for_each_entry(other, &efx_primary_list, node) { 12510bcf4a64SBen Hutchings if (efx_same_controller(efx, other)) { 12520bcf4a64SBen Hutchings netif_dbg(efx, probe, efx->net_dev, 12530bcf4a64SBen Hutchings "adding to secondary list of %s %s\n", 12540bcf4a64SBen Hutchings pci_name(other->pci_dev), 12550bcf4a64SBen Hutchings other->net_dev->name); 12560bcf4a64SBen Hutchings list_add_tail(&efx->node, 12570bcf4a64SBen Hutchings &other->secondary_list); 12580bcf4a64SBen Hutchings efx->primary = other; 12590bcf4a64SBen Hutchings return; 12600bcf4a64SBen Hutchings } 12610bcf4a64SBen Hutchings } 12620bcf4a64SBen Hutchings 12630bcf4a64SBen Hutchings netif_dbg(efx, probe, efx->net_dev, 12640bcf4a64SBen Hutchings "adding to unassociated list\n"); 12650bcf4a64SBen Hutchings list_add_tail(&efx->node, &efx_unassociated_list); 12660bcf4a64SBen Hutchings } 12670bcf4a64SBen Hutchings } 12680bcf4a64SBen Hutchings 12690bcf4a64SBen Hutchings static void efx_dissociate(struct efx_nic *efx) 12700bcf4a64SBen Hutchings { 12710bcf4a64SBen Hutchings struct efx_nic *other, *next; 12720bcf4a64SBen Hutchings 12730bcf4a64SBen Hutchings list_del(&efx->node); 12740bcf4a64SBen Hutchings efx->primary = NULL; 12750bcf4a64SBen Hutchings 12760bcf4a64SBen Hutchings list_for_each_entry_safe(other, next, &efx->secondary_list, node) { 12770bcf4a64SBen Hutchings list_del(&other->node); 12780bcf4a64SBen Hutchings netif_dbg(other, probe, other->net_dev, 12790bcf4a64SBen Hutchings "moving to unassociated list\n"); 12800bcf4a64SBen Hutchings list_add_tail(&other->node, &efx_unassociated_list); 12810bcf4a64SBen Hutchings other->primary = NULL; 12820bcf4a64SBen Hutchings } 12830bcf4a64SBen Hutchings } 12840bcf4a64SBen Hutchings 1285874aeea5SJeff Kirsher /* This configures the PCI device to enable I/O and DMA. */ 1286874aeea5SJeff Kirsher static int efx_init_io(struct efx_nic *efx) 1287874aeea5SJeff Kirsher { 1288874aeea5SJeff Kirsher struct pci_dev *pci_dev = efx->pci_dev; 1289874aeea5SJeff Kirsher dma_addr_t dma_mask = efx->type->max_dma_mask; 1290b105798fSBen Hutchings unsigned int mem_map_size = efx->type->mem_map_size(efx); 129102246a7fSShradha Shah int rc, bar; 1292874aeea5SJeff Kirsher 1293874aeea5SJeff Kirsher netif_dbg(efx, probe, efx->net_dev, "initialising I/O\n"); 1294874aeea5SJeff Kirsher 129503714bbbSEdward Cree bar = efx->type->mem_bar(efx); 129602246a7fSShradha Shah 1297874aeea5SJeff Kirsher rc = pci_enable_device(pci_dev); 1298874aeea5SJeff Kirsher if (rc) { 1299874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 1300874aeea5SJeff Kirsher "failed to enable PCI device\n"); 1301874aeea5SJeff Kirsher goto fail1; 1302874aeea5SJeff Kirsher } 1303874aeea5SJeff Kirsher 1304874aeea5SJeff Kirsher pci_set_master(pci_dev); 1305874aeea5SJeff Kirsher 130606e9552fSChristoph Hellwig /* Set the PCI DMA mask. Try all possibilities from our genuine mask 130706e9552fSChristoph Hellwig * down to 32 bits, because some architectures will allow 40 bit 1308874aeea5SJeff Kirsher * masks event though they reject 46 bit masks. 1309874aeea5SJeff Kirsher */ 1310874aeea5SJeff Kirsher while (dma_mask > 0x7fffffffUL) { 13119663dedaSRussell King rc = dma_set_mask_and_coherent(&pci_dev->dev, dma_mask); 1312e9e01846SBen Hutchings if (rc == 0) 1313874aeea5SJeff Kirsher break; 1314874aeea5SJeff Kirsher dma_mask >>= 1; 1315874aeea5SJeff Kirsher } 1316874aeea5SJeff Kirsher if (rc) { 1317874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 1318874aeea5SJeff Kirsher "could not find a suitable DMA mask\n"); 1319874aeea5SJeff Kirsher goto fail2; 1320874aeea5SJeff Kirsher } 1321874aeea5SJeff Kirsher netif_dbg(efx, probe, efx->net_dev, 1322874aeea5SJeff Kirsher "using DMA mask %llx\n", (unsigned long long) dma_mask); 1323874aeea5SJeff Kirsher 132402246a7fSShradha Shah efx->membase_phys = pci_resource_start(efx->pci_dev, bar); 132502246a7fSShradha Shah rc = pci_request_region(pci_dev, bar, "sfc"); 1326874aeea5SJeff Kirsher if (rc) { 1327874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 1328874aeea5SJeff Kirsher "request for memory BAR failed\n"); 1329874aeea5SJeff Kirsher rc = -EIO; 1330874aeea5SJeff Kirsher goto fail3; 1331874aeea5SJeff Kirsher } 1332b105798fSBen Hutchings efx->membase = ioremap_nocache(efx->membase_phys, mem_map_size); 1333874aeea5SJeff Kirsher if (!efx->membase) { 1334874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 1335874aeea5SJeff Kirsher "could not map memory BAR at %llx+%x\n", 1336b105798fSBen Hutchings (unsigned long long)efx->membase_phys, mem_map_size); 1337874aeea5SJeff Kirsher rc = -ENOMEM; 1338874aeea5SJeff Kirsher goto fail4; 1339874aeea5SJeff Kirsher } 1340874aeea5SJeff Kirsher netif_dbg(efx, probe, efx->net_dev, 1341874aeea5SJeff Kirsher "memory BAR at %llx+%x (virtual %p)\n", 1342b105798fSBen Hutchings (unsigned long long)efx->membase_phys, mem_map_size, 1343b105798fSBen Hutchings efx->membase); 1344874aeea5SJeff Kirsher 1345874aeea5SJeff Kirsher return 0; 1346874aeea5SJeff Kirsher 1347874aeea5SJeff Kirsher fail4: 134802246a7fSShradha Shah pci_release_region(efx->pci_dev, bar); 1349874aeea5SJeff Kirsher fail3: 1350874aeea5SJeff Kirsher efx->membase_phys = 0; 1351874aeea5SJeff Kirsher fail2: 1352874aeea5SJeff Kirsher pci_disable_device(efx->pci_dev); 1353874aeea5SJeff Kirsher fail1: 1354874aeea5SJeff Kirsher return rc; 1355874aeea5SJeff Kirsher } 1356874aeea5SJeff Kirsher 1357874aeea5SJeff Kirsher static void efx_fini_io(struct efx_nic *efx) 1358874aeea5SJeff Kirsher { 135902246a7fSShradha Shah int bar; 136002246a7fSShradha Shah 1361874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "shutting down I/O\n"); 1362874aeea5SJeff Kirsher 1363874aeea5SJeff Kirsher if (efx->membase) { 1364874aeea5SJeff Kirsher iounmap(efx->membase); 1365874aeea5SJeff Kirsher efx->membase = NULL; 1366874aeea5SJeff Kirsher } 1367874aeea5SJeff Kirsher 1368874aeea5SJeff Kirsher if (efx->membase_phys) { 136903714bbbSEdward Cree bar = efx->type->mem_bar(efx); 137002246a7fSShradha Shah pci_release_region(efx->pci_dev, bar); 1371874aeea5SJeff Kirsher efx->membase_phys = 0; 1372874aeea5SJeff Kirsher } 1373874aeea5SJeff Kirsher 13746598dad2SDaniel Pieczko /* Don't disable bus-mastering if VFs are assigned */ 13756598dad2SDaniel Pieczko if (!pci_vfs_assigned(efx->pci_dev)) 1376874aeea5SJeff Kirsher pci_disable_device(efx->pci_dev); 1377874aeea5SJeff Kirsher } 1378874aeea5SJeff Kirsher 137942356d9aSEdward Cree void efx_set_default_rx_indir_table(struct efx_nic *efx, 138042356d9aSEdward Cree struct efx_rss_context *ctx) 1381267c0157SJon Cooper { 1382267c0157SJon Cooper size_t i; 1383267c0157SJon Cooper 138442356d9aSEdward Cree for (i = 0; i < ARRAY_SIZE(ctx->rx_indir_table); i++) 138542356d9aSEdward Cree ctx->rx_indir_table[i] = 1386267c0157SJon Cooper ethtool_rxfh_indir_default(i, efx->rss_spread); 1387267c0157SJon Cooper } 1388267c0157SJon Cooper 1389a9a52506SBen Hutchings static unsigned int efx_wanted_parallelism(struct efx_nic *efx) 1390874aeea5SJeff Kirsher { 1391cdb08f8fSBen Hutchings cpumask_var_t thread_mask; 1392a16e5b24SBen Hutchings unsigned int count; 1393874aeea5SJeff Kirsher int cpu; 1394874aeea5SJeff Kirsher 1395cd2d5b52SBen Hutchings if (rss_cpus) { 1396cd2d5b52SBen Hutchings count = rss_cpus; 1397cd2d5b52SBen Hutchings } else { 1398cdb08f8fSBen Hutchings if (unlikely(!zalloc_cpumask_var(&thread_mask, GFP_KERNEL))) { 1399a9a52506SBen Hutchings netif_warn(efx, probe, efx->net_dev, 1400a9a52506SBen Hutchings "RSS disabled due to allocation failure\n"); 1401874aeea5SJeff Kirsher return 1; 1402874aeea5SJeff Kirsher } 1403874aeea5SJeff Kirsher 1404874aeea5SJeff Kirsher count = 0; 1405874aeea5SJeff Kirsher for_each_online_cpu(cpu) { 1406cdb08f8fSBen Hutchings if (!cpumask_test_cpu(cpu, thread_mask)) { 1407874aeea5SJeff Kirsher ++count; 1408cdb08f8fSBen Hutchings cpumask_or(thread_mask, thread_mask, 140906931e62SBartosz Golaszewski topology_sibling_cpumask(cpu)); 1410874aeea5SJeff Kirsher } 1411874aeea5SJeff Kirsher } 1412874aeea5SJeff Kirsher 1413cdb08f8fSBen Hutchings free_cpumask_var(thread_mask); 1414cd2d5b52SBen Hutchings } 1415cd2d5b52SBen Hutchings 1416271a8b42SBert Kenward if (count > EFX_MAX_RX_QUEUES) { 1417271a8b42SBert Kenward netif_cond_dbg(efx, probe, efx->net_dev, !rss_cpus, warn, 1418271a8b42SBert Kenward "Reducing number of rx queues from %u to %u.\n", 1419271a8b42SBert Kenward count, EFX_MAX_RX_QUEUES); 1420271a8b42SBert Kenward count = EFX_MAX_RX_QUEUES; 1421271a8b42SBert Kenward } 1422271a8b42SBert Kenward 1423cd2d5b52SBen Hutchings /* If RSS is requested for the PF *and* VFs then we can't write RSS 1424cd2d5b52SBen Hutchings * table entries that are inaccessible to VFs 1425cd2d5b52SBen Hutchings */ 14267fa8d547SShradha Shah #ifdef CONFIG_SFC_SRIOV 14277fa8d547SShradha Shah if (efx->type->sriov_wanted) { 1428d98a4ffeSShradha Shah if (efx->type->sriov_wanted(efx) && efx_vf_size(efx) > 1 && 1429cd2d5b52SBen Hutchings count > efx_vf_size(efx)) { 1430cd2d5b52SBen Hutchings netif_warn(efx, probe, efx->net_dev, 1431cd2d5b52SBen Hutchings "Reducing number of RSS channels from %u to %u for " 1432cd2d5b52SBen Hutchings "VF support. Increase vf-msix-limit to use more " 1433cd2d5b52SBen Hutchings "channels on the PF.\n", 1434cd2d5b52SBen Hutchings count, efx_vf_size(efx)); 1435cd2d5b52SBen Hutchings count = efx_vf_size(efx); 1436cd2d5b52SBen Hutchings } 14377fa8d547SShradha Shah } 14387fa8d547SShradha Shah #endif 1439cd2d5b52SBen Hutchings 1440874aeea5SJeff Kirsher return count; 1441874aeea5SJeff Kirsher } 1442874aeea5SJeff Kirsher 1443874aeea5SJeff Kirsher /* Probe the number and type of interrupts we are able to obtain, and 1444874aeea5SJeff Kirsher * the resulting numbers of channels and RX queues. 1445874aeea5SJeff Kirsher */ 1446874aeea5SJeff Kirsher static int efx_probe_interrupts(struct efx_nic *efx) 1447874aeea5SJeff Kirsher { 14487f967c01SBen Hutchings unsigned int extra_channels = 0; 14497f967c01SBen Hutchings unsigned int i, j; 1450a16e5b24SBen Hutchings int rc; 1451874aeea5SJeff Kirsher 14527f967c01SBen Hutchings for (i = 0; i < EFX_MAX_EXTRA_CHANNELS; i++) 14537f967c01SBen Hutchings if (efx->extra_channel_type[i]) 14547f967c01SBen Hutchings ++extra_channels; 14557f967c01SBen Hutchings 1456874aeea5SJeff Kirsher if (efx->interrupt_mode == EFX_INT_MODE_MSIX) { 1457874aeea5SJeff Kirsher struct msix_entry xentries[EFX_MAX_CHANNELS]; 1458a16e5b24SBen Hutchings unsigned int n_channels; 1459874aeea5SJeff Kirsher 1460a9a52506SBen Hutchings n_channels = efx_wanted_parallelism(efx); 1461b0fbdae1SShradha Shah if (efx_separate_tx_channels) 1462874aeea5SJeff Kirsher n_channels *= 2; 14637f967c01SBen Hutchings n_channels += extra_channels; 1464b105798fSBen Hutchings n_channels = min(n_channels, efx->max_channels); 1465874aeea5SJeff Kirsher 1466874aeea5SJeff Kirsher for (i = 0; i < n_channels; i++) 1467874aeea5SJeff Kirsher xentries[i].entry = i; 1468184603d8SAlexander Gordeev rc = pci_enable_msix_range(efx->pci_dev, 1469184603d8SAlexander Gordeev xentries, 1, n_channels); 1470184603d8SAlexander Gordeev if (rc < 0) { 1471184603d8SAlexander Gordeev /* Fall back to single channel MSI */ 1472184603d8SAlexander Gordeev netif_err(efx, drv, efx->net_dev, 1473184603d8SAlexander Gordeev "could not enable MSI-X\n"); 147462980cb6SAndrew Rybchenko if (efx->type->min_interrupt_mode >= EFX_INT_MODE_MSI) 147562980cb6SAndrew Rybchenko efx->interrupt_mode = EFX_INT_MODE_MSI; 147662980cb6SAndrew Rybchenko else 147762980cb6SAndrew Rybchenko return rc; 1478184603d8SAlexander Gordeev } else if (rc < n_channels) { 1479874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, 1480874aeea5SJeff Kirsher "WARNING: Insufficient MSI-X vectors" 1481a16e5b24SBen Hutchings " available (%d < %u).\n", rc, n_channels); 1482874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, 1483874aeea5SJeff Kirsher "WARNING: Performance may be reduced.\n"); 1484874aeea5SJeff Kirsher n_channels = rc; 1485874aeea5SJeff Kirsher } 1486874aeea5SJeff Kirsher 1487184603d8SAlexander Gordeev if (rc > 0) { 1488874aeea5SJeff Kirsher efx->n_channels = n_channels; 14897f967c01SBen Hutchings if (n_channels > extra_channels) 14907f967c01SBen Hutchings n_channels -= extra_channels; 1491b0fbdae1SShradha Shah if (efx_separate_tx_channels) { 1492b0fbdae1SShradha Shah efx->n_tx_channels = min(max(n_channels / 2, 1493b0fbdae1SShradha Shah 1U), 1494b0fbdae1SShradha Shah efx->max_tx_channels); 14957f967c01SBen Hutchings efx->n_rx_channels = max(n_channels - 14967f967c01SBen Hutchings efx->n_tx_channels, 14977f967c01SBen Hutchings 1U); 1498874aeea5SJeff Kirsher } else { 1499b0fbdae1SShradha Shah efx->n_tx_channels = min(n_channels, 1500b0fbdae1SShradha Shah efx->max_tx_channels); 15017f967c01SBen Hutchings efx->n_rx_channels = n_channels; 1502874aeea5SJeff Kirsher } 15037f967c01SBen Hutchings for (i = 0; i < efx->n_channels; i++) 1504874aeea5SJeff Kirsher efx_get_channel(efx, i)->irq = 1505874aeea5SJeff Kirsher xentries[i].vector; 1506874aeea5SJeff Kirsher } 1507874aeea5SJeff Kirsher } 1508874aeea5SJeff Kirsher 1509874aeea5SJeff Kirsher /* Try single interrupt MSI */ 1510874aeea5SJeff Kirsher if (efx->interrupt_mode == EFX_INT_MODE_MSI) { 1511874aeea5SJeff Kirsher efx->n_channels = 1; 1512874aeea5SJeff Kirsher efx->n_rx_channels = 1; 1513874aeea5SJeff Kirsher efx->n_tx_channels = 1; 1514874aeea5SJeff Kirsher rc = pci_enable_msi(efx->pci_dev); 1515874aeea5SJeff Kirsher if (rc == 0) { 1516874aeea5SJeff Kirsher efx_get_channel(efx, 0)->irq = efx->pci_dev->irq; 1517874aeea5SJeff Kirsher } else { 1518874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, 1519874aeea5SJeff Kirsher "could not enable MSI\n"); 152062980cb6SAndrew Rybchenko if (efx->type->min_interrupt_mode >= EFX_INT_MODE_LEGACY) 1521874aeea5SJeff Kirsher efx->interrupt_mode = EFX_INT_MODE_LEGACY; 152262980cb6SAndrew Rybchenko else 152362980cb6SAndrew Rybchenko return rc; 1524874aeea5SJeff Kirsher } 1525874aeea5SJeff Kirsher } 1526874aeea5SJeff Kirsher 1527874aeea5SJeff Kirsher /* Assume legacy interrupts */ 1528874aeea5SJeff Kirsher if (efx->interrupt_mode == EFX_INT_MODE_LEGACY) { 1529b0fbdae1SShradha Shah efx->n_channels = 1 + (efx_separate_tx_channels ? 1 : 0); 1530874aeea5SJeff Kirsher efx->n_rx_channels = 1; 1531874aeea5SJeff Kirsher efx->n_tx_channels = 1; 1532874aeea5SJeff Kirsher efx->legacy_irq = efx->pci_dev->irq; 1533874aeea5SJeff Kirsher } 1534874aeea5SJeff Kirsher 15357f967c01SBen Hutchings /* Assign extra channels if possible */ 15362935e3c3SEdward Cree efx->n_extra_tx_channels = 0; 15377f967c01SBen Hutchings j = efx->n_channels; 15387f967c01SBen Hutchings for (i = 0; i < EFX_MAX_EXTRA_CHANNELS; i++) { 15397f967c01SBen Hutchings if (!efx->extra_channel_type[i]) 15407f967c01SBen Hutchings continue; 15417f967c01SBen Hutchings if (efx->interrupt_mode != EFX_INT_MODE_MSIX || 15427f967c01SBen Hutchings efx->n_channels <= extra_channels) { 15437f967c01SBen Hutchings efx->extra_channel_type[i]->handle_no_channel(efx); 15447f967c01SBen Hutchings } else { 15457f967c01SBen Hutchings --j; 15467f967c01SBen Hutchings efx_get_channel(efx, j)->type = 15477f967c01SBen Hutchings efx->extra_channel_type[i]; 15482935e3c3SEdward Cree if (efx_channel_has_tx_queues(efx_get_channel(efx, j))) 15492935e3c3SEdward Cree efx->n_extra_tx_channels++; 15507f967c01SBen Hutchings } 15517f967c01SBen Hutchings } 15527f967c01SBen Hutchings 1553cd2d5b52SBen Hutchings /* RSS might be usable on VFs even if it is disabled on the PF */ 15547fa8d547SShradha Shah #ifdef CONFIG_SFC_SRIOV 15557fa8d547SShradha Shah if (efx->type->sriov_wanted) { 1556327c685eSShradha Shah efx->rss_spread = ((efx->n_rx_channels > 1 || 1557d98a4ffeSShradha Shah !efx->type->sriov_wanted(efx)) ? 1558cd2d5b52SBen Hutchings efx->n_rx_channels : efx_vf_size(efx)); 15597fa8d547SShradha Shah return 0; 15607fa8d547SShradha Shah } 15617fa8d547SShradha Shah #endif 15627fa8d547SShradha Shah efx->rss_spread = efx->n_rx_channels; 1563cd2d5b52SBen Hutchings 1564874aeea5SJeff Kirsher return 0; 1565874aeea5SJeff Kirsher } 1566874aeea5SJeff Kirsher 1567a83762d9SBert Kenward #if defined(CONFIG_SMP) 1568a83762d9SBert Kenward static void efx_set_interrupt_affinity(struct efx_nic *efx) 1569a83762d9SBert Kenward { 1570a83762d9SBert Kenward struct efx_channel *channel; 1571a83762d9SBert Kenward unsigned int cpu; 1572a83762d9SBert Kenward 1573a83762d9SBert Kenward efx_for_each_channel(channel, efx) { 1574a83762d9SBert Kenward cpu = cpumask_local_spread(channel->channel, 1575a83762d9SBert Kenward pcibus_to_node(efx->pci_dev->bus)); 1576a83762d9SBert Kenward irq_set_affinity_hint(channel->irq, cpumask_of(cpu)); 1577a83762d9SBert Kenward } 1578a83762d9SBert Kenward } 1579a83762d9SBert Kenward 1580a83762d9SBert Kenward static void efx_clear_interrupt_affinity(struct efx_nic *efx) 1581a83762d9SBert Kenward { 1582a83762d9SBert Kenward struct efx_channel *channel; 1583a83762d9SBert Kenward 1584a83762d9SBert Kenward efx_for_each_channel(channel, efx) 1585a83762d9SBert Kenward irq_set_affinity_hint(channel->irq, NULL); 1586a83762d9SBert Kenward } 1587a83762d9SBert Kenward #else 1588a83762d9SBert Kenward static void 1589a83762d9SBert Kenward efx_set_interrupt_affinity(struct efx_nic *efx __attribute__ ((unused))) 1590a83762d9SBert Kenward { 1591a83762d9SBert Kenward } 1592a83762d9SBert Kenward 1593a83762d9SBert Kenward static void 1594a83762d9SBert Kenward efx_clear_interrupt_affinity(struct efx_nic *efx __attribute__ ((unused))) 1595a83762d9SBert Kenward { 1596a83762d9SBert Kenward } 1597a83762d9SBert Kenward #endif /* CONFIG_SMP */ 1598a83762d9SBert Kenward 1599261e4d96SJon Cooper static int efx_soft_enable_interrupts(struct efx_nic *efx) 1600d8291187SBen Hutchings { 1601261e4d96SJon Cooper struct efx_channel *channel, *end_channel; 1602261e4d96SJon Cooper int rc; 1603d8291187SBen Hutchings 1604d8291187SBen Hutchings BUG_ON(efx->state == STATE_DISABLED); 1605d8291187SBen Hutchings 1606d8291187SBen Hutchings efx->irq_soft_enabled = true; 1607d8291187SBen Hutchings smp_wmb(); 1608d8291187SBen Hutchings 1609d8291187SBen Hutchings efx_for_each_channel(channel, efx) { 1610261e4d96SJon Cooper if (!channel->type->keep_eventq) { 1611261e4d96SJon Cooper rc = efx_init_eventq(channel); 1612261e4d96SJon Cooper if (rc) 1613261e4d96SJon Cooper goto fail; 1614261e4d96SJon Cooper } 1615d8291187SBen Hutchings efx_start_eventq(channel); 1616d8291187SBen Hutchings } 1617d8291187SBen Hutchings 1618d8291187SBen Hutchings efx_mcdi_mode_event(efx); 1619261e4d96SJon Cooper 1620261e4d96SJon Cooper return 0; 1621261e4d96SJon Cooper fail: 1622261e4d96SJon Cooper end_channel = channel; 1623261e4d96SJon Cooper efx_for_each_channel(channel, efx) { 1624261e4d96SJon Cooper if (channel == end_channel) 1625261e4d96SJon Cooper break; 1626261e4d96SJon Cooper efx_stop_eventq(channel); 1627261e4d96SJon Cooper if (!channel->type->keep_eventq) 1628261e4d96SJon Cooper efx_fini_eventq(channel); 1629261e4d96SJon Cooper } 1630261e4d96SJon Cooper 1631261e4d96SJon Cooper return rc; 1632d8291187SBen Hutchings } 1633d8291187SBen Hutchings 1634d8291187SBen Hutchings static void efx_soft_disable_interrupts(struct efx_nic *efx) 1635d8291187SBen Hutchings { 1636d8291187SBen Hutchings struct efx_channel *channel; 1637d8291187SBen Hutchings 1638d8291187SBen Hutchings if (efx->state == STATE_DISABLED) 1639d8291187SBen Hutchings return; 1640d8291187SBen Hutchings 1641d8291187SBen Hutchings efx_mcdi_mode_poll(efx); 1642d8291187SBen Hutchings 1643d8291187SBen Hutchings efx->irq_soft_enabled = false; 1644d8291187SBen Hutchings smp_wmb(); 1645d8291187SBen Hutchings 1646d8291187SBen Hutchings if (efx->legacy_irq) 1647d8291187SBen Hutchings synchronize_irq(efx->legacy_irq); 1648d8291187SBen Hutchings 1649d8291187SBen Hutchings efx_for_each_channel(channel, efx) { 1650d8291187SBen Hutchings if (channel->irq) 1651d8291187SBen Hutchings synchronize_irq(channel->irq); 1652d8291187SBen Hutchings 1653d8291187SBen Hutchings efx_stop_eventq(channel); 1654d8291187SBen Hutchings if (!channel->type->keep_eventq) 1655d8291187SBen Hutchings efx_fini_eventq(channel); 1656d8291187SBen Hutchings } 1657cade715fSBen Hutchings 1658cade715fSBen Hutchings /* Flush the asynchronous MCDI request queue */ 1659cade715fSBen Hutchings efx_mcdi_flush_async(efx); 1660d8291187SBen Hutchings } 1661d8291187SBen Hutchings 1662261e4d96SJon Cooper static int efx_enable_interrupts(struct efx_nic *efx) 16639f2cb71cSBen Hutchings { 1664261e4d96SJon Cooper struct efx_channel *channel, *end_channel; 1665261e4d96SJon Cooper int rc; 16669f2cb71cSBen Hutchings 16678b7325b4SBen Hutchings BUG_ON(efx->state == STATE_DISABLED); 16688b7325b4SBen Hutchings 1669b28405b0SAlexandre Rames if (efx->eeh_disabled_legacy_irq) { 1670b28405b0SAlexandre Rames enable_irq(efx->legacy_irq); 1671b28405b0SAlexandre Rames efx->eeh_disabled_legacy_irq = false; 1672b28405b0SAlexandre Rames } 1673d8291187SBen Hutchings 167486094f7fSBen Hutchings efx->type->irq_enable_master(efx); 16759f2cb71cSBen Hutchings 16769f2cb71cSBen Hutchings efx_for_each_channel(channel, efx) { 1677261e4d96SJon Cooper if (channel->type->keep_eventq) { 1678261e4d96SJon Cooper rc = efx_init_eventq(channel); 1679261e4d96SJon Cooper if (rc) 1680261e4d96SJon Cooper goto fail; 1681261e4d96SJon Cooper } 16829f2cb71cSBen Hutchings } 16839f2cb71cSBen Hutchings 1684261e4d96SJon Cooper rc = efx_soft_enable_interrupts(efx); 1685261e4d96SJon Cooper if (rc) 1686261e4d96SJon Cooper goto fail; 1687261e4d96SJon Cooper 1688261e4d96SJon Cooper return 0; 1689261e4d96SJon Cooper 1690261e4d96SJon Cooper fail: 1691261e4d96SJon Cooper end_channel = channel; 1692261e4d96SJon Cooper efx_for_each_channel(channel, efx) { 1693261e4d96SJon Cooper if (channel == end_channel) 1694261e4d96SJon Cooper break; 1695261e4d96SJon Cooper if (channel->type->keep_eventq) 1696261e4d96SJon Cooper efx_fini_eventq(channel); 1697261e4d96SJon Cooper } 1698261e4d96SJon Cooper 1699261e4d96SJon Cooper efx->type->irq_disable_non_ev(efx); 1700261e4d96SJon Cooper 1701261e4d96SJon Cooper return rc; 17029f2cb71cSBen Hutchings } 17039f2cb71cSBen Hutchings 1704d8291187SBen Hutchings static void efx_disable_interrupts(struct efx_nic *efx) 17059f2cb71cSBen Hutchings { 17069f2cb71cSBen Hutchings struct efx_channel *channel; 17079f2cb71cSBen Hutchings 1708d8291187SBen Hutchings efx_soft_disable_interrupts(efx); 17099f2cb71cSBen Hutchings 17109f2cb71cSBen Hutchings efx_for_each_channel(channel, efx) { 1711d8291187SBen Hutchings if (channel->type->keep_eventq) 17129f2cb71cSBen Hutchings efx_fini_eventq(channel); 17139f2cb71cSBen Hutchings } 1714d8291187SBen Hutchings 171586094f7fSBen Hutchings efx->type->irq_disable_non_ev(efx); 17169f2cb71cSBen Hutchings } 17179f2cb71cSBen Hutchings 1718874aeea5SJeff Kirsher static void efx_remove_interrupts(struct efx_nic *efx) 1719874aeea5SJeff Kirsher { 1720874aeea5SJeff Kirsher struct efx_channel *channel; 1721874aeea5SJeff Kirsher 1722874aeea5SJeff Kirsher /* Remove MSI/MSI-X interrupts */ 1723874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) 1724874aeea5SJeff Kirsher channel->irq = 0; 1725874aeea5SJeff Kirsher pci_disable_msi(efx->pci_dev); 1726874aeea5SJeff Kirsher pci_disable_msix(efx->pci_dev); 1727874aeea5SJeff Kirsher 1728874aeea5SJeff Kirsher /* Remove legacy interrupt */ 1729874aeea5SJeff Kirsher efx->legacy_irq = 0; 1730874aeea5SJeff Kirsher } 1731874aeea5SJeff Kirsher 1732874aeea5SJeff Kirsher static void efx_set_channels(struct efx_nic *efx) 1733874aeea5SJeff Kirsher { 1734874aeea5SJeff Kirsher struct efx_channel *channel; 1735874aeea5SJeff Kirsher struct efx_tx_queue *tx_queue; 1736874aeea5SJeff Kirsher 1737874aeea5SJeff Kirsher efx->tx_channel_offset = 1738b0fbdae1SShradha Shah efx_separate_tx_channels ? 1739b0fbdae1SShradha Shah efx->n_channels - efx->n_tx_channels : 0; 1740874aeea5SJeff Kirsher 174179d68b37SStuart Hodgson /* We need to mark which channels really have RX and TX 174279d68b37SStuart Hodgson * queues, and adjust the TX queue numbers if we have separate 1743874aeea5SJeff Kirsher * RX-only and TX-only channels. 1744874aeea5SJeff Kirsher */ 1745874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) { 174679d68b37SStuart Hodgson if (channel->channel < efx->n_rx_channels) 174779d68b37SStuart Hodgson channel->rx_queue.core_index = channel->channel; 174879d68b37SStuart Hodgson else 174979d68b37SStuart Hodgson channel->rx_queue.core_index = -1; 175079d68b37SStuart Hodgson 1751874aeea5SJeff Kirsher efx_for_each_channel_tx_queue(tx_queue, channel) 1752874aeea5SJeff Kirsher tx_queue->queue -= (efx->tx_channel_offset * 1753874aeea5SJeff Kirsher EFX_TXQ_TYPES); 1754874aeea5SJeff Kirsher } 1755874aeea5SJeff Kirsher } 1756874aeea5SJeff Kirsher 1757874aeea5SJeff Kirsher static int efx_probe_nic(struct efx_nic *efx) 1758874aeea5SJeff Kirsher { 1759874aeea5SJeff Kirsher int rc; 1760874aeea5SJeff Kirsher 1761874aeea5SJeff Kirsher netif_dbg(efx, probe, efx->net_dev, "creating NIC\n"); 1762874aeea5SJeff Kirsher 1763874aeea5SJeff Kirsher /* Carry out hardware-type specific initialisation */ 1764874aeea5SJeff Kirsher rc = efx->type->probe(efx); 1765874aeea5SJeff Kirsher if (rc) 1766874aeea5SJeff Kirsher return rc; 1767874aeea5SJeff Kirsher 1768b0fbdae1SShradha Shah do { 1769b0fbdae1SShradha Shah if (!efx->max_channels || !efx->max_tx_channels) { 1770b0fbdae1SShradha Shah netif_err(efx, drv, efx->net_dev, 1771b0fbdae1SShradha Shah "Insufficient resources to allocate" 1772b0fbdae1SShradha Shah " any channels\n"); 1773b0fbdae1SShradha Shah rc = -ENOSPC; 1774b0fbdae1SShradha Shah goto fail1; 1775b0fbdae1SShradha Shah } 1776b0fbdae1SShradha Shah 1777b0fbdae1SShradha Shah /* Determine the number of channels and queues by trying 1778b0fbdae1SShradha Shah * to hook in MSI-X interrupts. 1779b0fbdae1SShradha Shah */ 1780874aeea5SJeff Kirsher rc = efx_probe_interrupts(efx); 1781874aeea5SJeff Kirsher if (rc) 1782c15eed22SBen Hutchings goto fail1; 1783874aeea5SJeff Kirsher 178452ad762bSDaniel Pieczko efx_set_channels(efx); 178552ad762bSDaniel Pieczko 1786b0fbdae1SShradha Shah /* dimension_resources can fail with EAGAIN */ 1787c15eed22SBen Hutchings rc = efx->type->dimension_resources(efx); 1788b0fbdae1SShradha Shah if (rc != 0 && rc != -EAGAIN) 1789c15eed22SBen Hutchings goto fail2; 179028e47c49SBen Hutchings 1791b0fbdae1SShradha Shah if (rc == -EAGAIN) 1792b0fbdae1SShradha Shah /* try again with new max_channels */ 1793b0fbdae1SShradha Shah efx_remove_interrupts(efx); 1794b0fbdae1SShradha Shah 1795b0fbdae1SShradha Shah } while (rc == -EAGAIN); 1796b0fbdae1SShradha Shah 1797874aeea5SJeff Kirsher if (efx->n_channels > 1) 179842356d9aSEdward Cree netdev_rss_key_fill(efx->rss_context.rx_hash_key, 179942356d9aSEdward Cree sizeof(efx->rss_context.rx_hash_key)); 180042356d9aSEdward Cree efx_set_default_rx_indir_table(efx, &efx->rss_context); 1801874aeea5SJeff Kirsher 1802874aeea5SJeff Kirsher netif_set_real_num_tx_queues(efx->net_dev, efx->n_tx_channels); 1803874aeea5SJeff Kirsher netif_set_real_num_rx_queues(efx->net_dev, efx->n_rx_channels); 1804874aeea5SJeff Kirsher 1805874aeea5SJeff Kirsher /* Initialise the interrupt moderation settings */ 1806539de7c5SBert Kenward efx->irq_mod_step_us = DIV_ROUND_UP(efx->timer_quantum_ns, 1000); 18079e393b30SBen Hutchings efx_init_irq_moderation(efx, tx_irq_mod_usec, rx_irq_mod_usec, true, 18089e393b30SBen Hutchings true); 1809874aeea5SJeff Kirsher 1810874aeea5SJeff Kirsher return 0; 1811874aeea5SJeff Kirsher 1812c15eed22SBen Hutchings fail2: 1813c15eed22SBen Hutchings efx_remove_interrupts(efx); 1814c15eed22SBen Hutchings fail1: 1815874aeea5SJeff Kirsher efx->type->remove(efx); 1816874aeea5SJeff Kirsher return rc; 1817874aeea5SJeff Kirsher } 1818874aeea5SJeff Kirsher 1819874aeea5SJeff Kirsher static void efx_remove_nic(struct efx_nic *efx) 1820874aeea5SJeff Kirsher { 1821874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "destroying NIC\n"); 1822874aeea5SJeff Kirsher 1823874aeea5SJeff Kirsher efx_remove_interrupts(efx); 1824874aeea5SJeff Kirsher efx->type->remove(efx); 1825874aeea5SJeff Kirsher } 1826874aeea5SJeff Kirsher 1827add72477SBen Hutchings static int efx_probe_filters(struct efx_nic *efx) 1828add72477SBen Hutchings { 1829add72477SBen Hutchings int rc; 1830add72477SBen Hutchings 18310d322413SEdward Cree init_rwsem(&efx->filter_sem); 1832d248953aSMartin Habets mutex_lock(&efx->mac_lock); 18330d322413SEdward Cree down_write(&efx->filter_sem); 1834add72477SBen Hutchings rc = efx->type->filter_table_probe(efx); 1835add72477SBen Hutchings if (rc) 18360d322413SEdward Cree goto out_unlock; 1837add72477SBen Hutchings 1838add72477SBen Hutchings #ifdef CONFIG_RFS_ACCEL 1839add72477SBen Hutchings if (efx->type->offload_features & NETIF_F_NTUPLE) { 1840faf8dcc1SJon Cooper struct efx_channel *channel; 1841faf8dcc1SJon Cooper int i, success = 1; 1842faf8dcc1SJon Cooper 1843faf8dcc1SJon Cooper efx_for_each_channel(channel, efx) { 1844faf8dcc1SJon Cooper channel->rps_flow_id = 1845faf8dcc1SJon Cooper kcalloc(efx->type->max_rx_ip_filters, 1846faf8dcc1SJon Cooper sizeof(*channel->rps_flow_id), 1847add72477SBen Hutchings GFP_KERNEL); 1848faf8dcc1SJon Cooper if (!channel->rps_flow_id) 1849faf8dcc1SJon Cooper success = 0; 1850faf8dcc1SJon Cooper else 1851faf8dcc1SJon Cooper for (i = 0; 1852faf8dcc1SJon Cooper i < efx->type->max_rx_ip_filters; 1853faf8dcc1SJon Cooper ++i) 1854faf8dcc1SJon Cooper channel->rps_flow_id[i] = 1855faf8dcc1SJon Cooper RPS_FLOW_ID_INVALID; 1856faf8dcc1SJon Cooper } 1857faf8dcc1SJon Cooper 1858faf8dcc1SJon Cooper if (!success) { 1859faf8dcc1SJon Cooper efx_for_each_channel(channel, efx) 1860faf8dcc1SJon Cooper kfree(channel->rps_flow_id); 1861add72477SBen Hutchings efx->type->filter_table_remove(efx); 18620d322413SEdward Cree rc = -ENOMEM; 18630d322413SEdward Cree goto out_unlock; 1864add72477SBen Hutchings } 1865faf8dcc1SJon Cooper 1866faf8dcc1SJon Cooper efx->rps_expire_index = efx->rps_expire_channel = 0; 1867add72477SBen Hutchings } 1868add72477SBen Hutchings #endif 18690d322413SEdward Cree out_unlock: 18700d322413SEdward Cree up_write(&efx->filter_sem); 1871d248953aSMartin Habets mutex_unlock(&efx->mac_lock); 18720d322413SEdward Cree return rc; 1873add72477SBen Hutchings } 1874add72477SBen Hutchings 1875add72477SBen Hutchings static void efx_remove_filters(struct efx_nic *efx) 1876add72477SBen Hutchings { 1877add72477SBen Hutchings #ifdef CONFIG_RFS_ACCEL 1878faf8dcc1SJon Cooper struct efx_channel *channel; 1879faf8dcc1SJon Cooper 1880faf8dcc1SJon Cooper efx_for_each_channel(channel, efx) 1881faf8dcc1SJon Cooper kfree(channel->rps_flow_id); 1882add72477SBen Hutchings #endif 18830d322413SEdward Cree down_write(&efx->filter_sem); 1884add72477SBen Hutchings efx->type->filter_table_remove(efx); 18850d322413SEdward Cree up_write(&efx->filter_sem); 1886add72477SBen Hutchings } 1887add72477SBen Hutchings 1888add72477SBen Hutchings 1889874aeea5SJeff Kirsher /************************************************************************** 1890874aeea5SJeff Kirsher * 1891874aeea5SJeff Kirsher * NIC startup/shutdown 1892874aeea5SJeff Kirsher * 1893874aeea5SJeff Kirsher *************************************************************************/ 1894874aeea5SJeff Kirsher 1895874aeea5SJeff Kirsher static int efx_probe_all(struct efx_nic *efx) 1896874aeea5SJeff Kirsher { 1897874aeea5SJeff Kirsher int rc; 1898874aeea5SJeff Kirsher 1899874aeea5SJeff Kirsher rc = efx_probe_nic(efx); 1900874aeea5SJeff Kirsher if (rc) { 1901874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, "failed to create NIC\n"); 1902874aeea5SJeff Kirsher goto fail1; 1903874aeea5SJeff Kirsher } 1904874aeea5SJeff Kirsher 1905874aeea5SJeff Kirsher rc = efx_probe_port(efx); 1906874aeea5SJeff Kirsher if (rc) { 1907874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, "failed to create port\n"); 1908874aeea5SJeff Kirsher goto fail2; 1909874aeea5SJeff Kirsher } 1910874aeea5SJeff Kirsher 19117e6d06f0SBen Hutchings BUILD_BUG_ON(EFX_DEFAULT_DMAQ_SIZE < EFX_RXQ_MIN_ENT); 19127e6d06f0SBen Hutchings if (WARN_ON(EFX_DEFAULT_DMAQ_SIZE < EFX_TXQ_MIN_ENT(efx))) { 19137e6d06f0SBen Hutchings rc = -EINVAL; 19147e6d06f0SBen Hutchings goto fail3; 19157e6d06f0SBen Hutchings } 1916874aeea5SJeff Kirsher efx->rxq_entries = efx->txq_entries = EFX_DEFAULT_DMAQ_SIZE; 1917874aeea5SJeff Kirsher 19186d8aaaf6SDaniel Pieczko #ifdef CONFIG_SFC_SRIOV 19196d8aaaf6SDaniel Pieczko rc = efx->type->vswitching_probe(efx); 19206d8aaaf6SDaniel Pieczko if (rc) /* not fatal; the PF will still work fine */ 19216d8aaaf6SDaniel Pieczko netif_warn(efx, probe, efx->net_dev, 19226d8aaaf6SDaniel Pieczko "failed to setup vswitching rc=%d;" 19236d8aaaf6SDaniel Pieczko " VFs may not function\n", rc); 19246d8aaaf6SDaniel Pieczko #endif 19256d8aaaf6SDaniel Pieczko 1926874aeea5SJeff Kirsher rc = efx_probe_filters(efx); 1927874aeea5SJeff Kirsher if (rc) { 1928874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 1929874aeea5SJeff Kirsher "failed to create filter tables\n"); 19306d8aaaf6SDaniel Pieczko goto fail4; 1931874aeea5SJeff Kirsher } 1932874aeea5SJeff Kirsher 19337f967c01SBen Hutchings rc = efx_probe_channels(efx); 19347f967c01SBen Hutchings if (rc) 19356d8aaaf6SDaniel Pieczko goto fail5; 19367f967c01SBen Hutchings 1937874aeea5SJeff Kirsher return 0; 1938874aeea5SJeff Kirsher 19396d8aaaf6SDaniel Pieczko fail5: 19407f967c01SBen Hutchings efx_remove_filters(efx); 19416d8aaaf6SDaniel Pieczko fail4: 19426d8aaaf6SDaniel Pieczko #ifdef CONFIG_SFC_SRIOV 19436d8aaaf6SDaniel Pieczko efx->type->vswitching_remove(efx); 19446d8aaaf6SDaniel Pieczko #endif 1945874aeea5SJeff Kirsher fail3: 1946874aeea5SJeff Kirsher efx_remove_port(efx); 1947874aeea5SJeff Kirsher fail2: 1948874aeea5SJeff Kirsher efx_remove_nic(efx); 1949874aeea5SJeff Kirsher fail1: 1950874aeea5SJeff Kirsher return rc; 1951874aeea5SJeff Kirsher } 1952874aeea5SJeff Kirsher 19538b7325b4SBen Hutchings /* If the interface is supposed to be running but is not, start 19548b7325b4SBen Hutchings * the hardware and software data path, regular activity for the port 19558b7325b4SBen Hutchings * (MAC statistics, link polling, etc.) and schedule the port to be 19568b7325b4SBen Hutchings * reconfigured. Interrupts must already be enabled. This function 19578b7325b4SBen Hutchings * is safe to call multiple times, so long as the NIC is not disabled. 19588b7325b4SBen Hutchings * Requires the RTNL lock. 19599f2cb71cSBen Hutchings */ 1960874aeea5SJeff Kirsher static void efx_start_all(struct efx_nic *efx) 1961874aeea5SJeff Kirsher { 1962874aeea5SJeff Kirsher EFX_ASSERT_RESET_SERIALISED(efx); 19638b7325b4SBen Hutchings BUG_ON(efx->state == STATE_DISABLED); 1964874aeea5SJeff Kirsher 1965874aeea5SJeff Kirsher /* Check that it is appropriate to restart the interface. All 1966874aeea5SJeff Kirsher * of these flags are safe to read under just the rtnl lock */ 1967e283546cSEdward Cree if (efx->port_enabled || !netif_running(efx->net_dev) || 1968e283546cSEdward Cree efx->reset_pending) 1969874aeea5SJeff Kirsher return; 1970874aeea5SJeff Kirsher 1971874aeea5SJeff Kirsher efx_start_port(efx); 19729f2cb71cSBen Hutchings efx_start_datapath(efx); 1973874aeea5SJeff Kirsher 1974626950dbSAlexandre Rames /* Start the hardware monitor if there is one */ 1975626950dbSAlexandre Rames if (efx->type->monitor != NULL) 1976874aeea5SJeff Kirsher queue_delayed_work(efx->workqueue, &efx->monitor_work, 1977874aeea5SJeff Kirsher efx_monitor_interval); 1978626950dbSAlexandre Rames 19795a6681e2SEdward Cree /* Link state detection is normally event-driven; we have 1980626950dbSAlexandre Rames * to poll now because we could have missed a change 1981626950dbSAlexandre Rames */ 1982874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 1983874aeea5SJeff Kirsher if (efx->phy_op->poll(efx)) 1984874aeea5SJeff Kirsher efx_link_status_changed(efx); 1985874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 1986874aeea5SJeff Kirsher 1987874aeea5SJeff Kirsher efx->type->start_stats(efx); 1988f8f3b5aeSJon Cooper efx->type->pull_stats(efx); 1989f8f3b5aeSJon Cooper spin_lock_bh(&efx->stats_lock); 1990f8f3b5aeSJon Cooper efx->type->update_stats(efx, NULL, NULL); 1991f8f3b5aeSJon Cooper spin_unlock_bh(&efx->stats_lock); 1992874aeea5SJeff Kirsher } 1993874aeea5SJeff Kirsher 19948b7325b4SBen Hutchings /* Quiesce the hardware and software data path, and regular activity 19958b7325b4SBen Hutchings * for the port without bringing the link down. Safe to call multiple 19968b7325b4SBen Hutchings * times with the NIC in almost any state, but interrupts should be 19978b7325b4SBen Hutchings * enabled. Requires the RTNL lock. 19988b7325b4SBen Hutchings */ 1999874aeea5SJeff Kirsher static void efx_stop_all(struct efx_nic *efx) 2000874aeea5SJeff Kirsher { 2001874aeea5SJeff Kirsher EFX_ASSERT_RESET_SERIALISED(efx); 2002874aeea5SJeff Kirsher 2003874aeea5SJeff Kirsher /* port_enabled can be read safely under the rtnl lock */ 2004874aeea5SJeff Kirsher if (!efx->port_enabled) 2005874aeea5SJeff Kirsher return; 2006874aeea5SJeff Kirsher 2007f8f3b5aeSJon Cooper /* update stats before we go down so we can accurately count 2008f8f3b5aeSJon Cooper * rx_nodesc_drops 2009f8f3b5aeSJon Cooper */ 2010f8f3b5aeSJon Cooper efx->type->pull_stats(efx); 2011f8f3b5aeSJon Cooper spin_lock_bh(&efx->stats_lock); 2012f8f3b5aeSJon Cooper efx->type->update_stats(efx, NULL, NULL); 2013f8f3b5aeSJon Cooper spin_unlock_bh(&efx->stats_lock); 2014874aeea5SJeff Kirsher efx->type->stop_stats(efx); 2015874aeea5SJeff Kirsher efx_stop_port(efx); 2016874aeea5SJeff Kirsher 201729c69a48SBen Hutchings /* Stop the kernel transmit interface. This is only valid if 201829c69a48SBen Hutchings * the device is stopped or detached; otherwise the watchdog 201929c69a48SBen Hutchings * may fire immediately. 202029c69a48SBen Hutchings */ 202129c69a48SBen Hutchings WARN_ON(netif_running(efx->net_dev) && 202229c69a48SBen Hutchings netif_device_present(efx->net_dev)); 20239f2cb71cSBen Hutchings netif_tx_disable(efx->net_dev); 20249f2cb71cSBen Hutchings 20259f2cb71cSBen Hutchings efx_stop_datapath(efx); 2026874aeea5SJeff Kirsher } 2027874aeea5SJeff Kirsher 2028874aeea5SJeff Kirsher static void efx_remove_all(struct efx_nic *efx) 2029874aeea5SJeff Kirsher { 2030e45a4fedSCharles McLachlan rtnl_lock(); 2031e45a4fedSCharles McLachlan efx_xdp_setup_prog(efx, NULL); 2032e45a4fedSCharles McLachlan rtnl_unlock(); 2033e45a4fedSCharles McLachlan 2034874aeea5SJeff Kirsher efx_remove_channels(efx); 20357f967c01SBen Hutchings efx_remove_filters(efx); 20366d8aaaf6SDaniel Pieczko #ifdef CONFIG_SFC_SRIOV 20376d8aaaf6SDaniel Pieczko efx->type->vswitching_remove(efx); 20386d8aaaf6SDaniel Pieczko #endif 2039874aeea5SJeff Kirsher efx_remove_port(efx); 2040874aeea5SJeff Kirsher efx_remove_nic(efx); 2041874aeea5SJeff Kirsher } 2042874aeea5SJeff Kirsher 2043874aeea5SJeff Kirsher /************************************************************************** 2044874aeea5SJeff Kirsher * 2045874aeea5SJeff Kirsher * Interrupt moderation 2046874aeea5SJeff Kirsher * 2047874aeea5SJeff Kirsher **************************************************************************/ 2048539de7c5SBert Kenward unsigned int efx_usecs_to_ticks(struct efx_nic *efx, unsigned int usecs) 2049874aeea5SJeff Kirsher { 2050b548f976SBen Hutchings if (usecs == 0) 2051b548f976SBen Hutchings return 0; 2052539de7c5SBert Kenward if (usecs * 1000 < efx->timer_quantum_ns) 2053874aeea5SJeff Kirsher return 1; /* never round down to 0 */ 2054539de7c5SBert Kenward return usecs * 1000 / efx->timer_quantum_ns; 2055539de7c5SBert Kenward } 2056539de7c5SBert Kenward 2057539de7c5SBert Kenward unsigned int efx_ticks_to_usecs(struct efx_nic *efx, unsigned int ticks) 2058539de7c5SBert Kenward { 2059539de7c5SBert Kenward /* We must round up when converting ticks to microseconds 2060539de7c5SBert Kenward * because we round down when converting the other way. 2061539de7c5SBert Kenward */ 2062539de7c5SBert Kenward return DIV_ROUND_UP(ticks * efx->timer_quantum_ns, 1000); 2063874aeea5SJeff Kirsher } 2064874aeea5SJeff Kirsher 2065874aeea5SJeff Kirsher /* Set interrupt moderation parameters */ 20669e393b30SBen Hutchings int efx_init_irq_moderation(struct efx_nic *efx, unsigned int tx_usecs, 20679e393b30SBen Hutchings unsigned int rx_usecs, bool rx_adaptive, 20689e393b30SBen Hutchings bool rx_may_override_tx) 2069874aeea5SJeff Kirsher { 2070874aeea5SJeff Kirsher struct efx_channel *channel; 2071d95e329aSBert Kenward unsigned int timer_max_us; 2072d95e329aSBert Kenward 2073874aeea5SJeff Kirsher EFX_ASSERT_RESET_SERIALISED(efx); 2074874aeea5SJeff Kirsher 2075d95e329aSBert Kenward timer_max_us = efx->timer_max_ns / 1000; 2076d95e329aSBert Kenward 2077d95e329aSBert Kenward if (tx_usecs > timer_max_us || rx_usecs > timer_max_us) 20789e393b30SBen Hutchings return -EINVAL; 20799e393b30SBen Hutchings 2080539de7c5SBert Kenward if (tx_usecs != rx_usecs && efx->tx_channel_offset == 0 && 20819e393b30SBen Hutchings !rx_may_override_tx) { 20829e393b30SBen Hutchings netif_err(efx, drv, efx->net_dev, "Channels are shared. " 20839e393b30SBen Hutchings "RX and TX IRQ moderation must be equal\n"); 20849e393b30SBen Hutchings return -EINVAL; 20859e393b30SBen Hutchings } 20869e393b30SBen Hutchings 2087874aeea5SJeff Kirsher efx->irq_rx_adaptive = rx_adaptive; 2088539de7c5SBert Kenward efx->irq_rx_moderation_us = rx_usecs; 2089874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) { 2090874aeea5SJeff Kirsher if (efx_channel_has_rx_queue(channel)) 2091539de7c5SBert Kenward channel->irq_moderation_us = rx_usecs; 2092874aeea5SJeff Kirsher else if (efx_channel_has_tx_queues(channel)) 2093539de7c5SBert Kenward channel->irq_moderation_us = tx_usecs; 2094874aeea5SJeff Kirsher } 20959e393b30SBen Hutchings 20969e393b30SBen Hutchings return 0; 2097874aeea5SJeff Kirsher } 2098874aeea5SJeff Kirsher 2099a0c4faf5SBen Hutchings void efx_get_irq_moderation(struct efx_nic *efx, unsigned int *tx_usecs, 2100a0c4faf5SBen Hutchings unsigned int *rx_usecs, bool *rx_adaptive) 2101a0c4faf5SBen Hutchings { 2102a0c4faf5SBen Hutchings *rx_adaptive = efx->irq_rx_adaptive; 2103539de7c5SBert Kenward *rx_usecs = efx->irq_rx_moderation_us; 2104a0c4faf5SBen Hutchings 2105a0c4faf5SBen Hutchings /* If channels are shared between RX and TX, so is IRQ 2106a0c4faf5SBen Hutchings * moderation. Otherwise, IRQ moderation is the same for all 2107a0c4faf5SBen Hutchings * TX channels and is not adaptive. 2108a0c4faf5SBen Hutchings */ 2109539de7c5SBert Kenward if (efx->tx_channel_offset == 0) { 2110a0c4faf5SBen Hutchings *tx_usecs = *rx_usecs; 2111539de7c5SBert Kenward } else { 2112539de7c5SBert Kenward struct efx_channel *tx_channel; 2113539de7c5SBert Kenward 2114539de7c5SBert Kenward tx_channel = efx->channel[efx->tx_channel_offset]; 2115539de7c5SBert Kenward *tx_usecs = tx_channel->irq_moderation_us; 2116539de7c5SBert Kenward } 2117a0c4faf5SBen Hutchings } 2118a0c4faf5SBen Hutchings 2119874aeea5SJeff Kirsher /************************************************************************** 2120874aeea5SJeff Kirsher * 2121874aeea5SJeff Kirsher * Hardware monitor 2122874aeea5SJeff Kirsher * 2123874aeea5SJeff Kirsher **************************************************************************/ 2124874aeea5SJeff Kirsher 2125874aeea5SJeff Kirsher /* Run periodically off the general workqueue */ 2126874aeea5SJeff Kirsher static void efx_monitor(struct work_struct *data) 2127874aeea5SJeff Kirsher { 2128874aeea5SJeff Kirsher struct efx_nic *efx = container_of(data, struct efx_nic, 2129874aeea5SJeff Kirsher monitor_work.work); 2130874aeea5SJeff Kirsher 2131874aeea5SJeff Kirsher netif_vdbg(efx, timer, efx->net_dev, 2132874aeea5SJeff Kirsher "hardware monitor executing on CPU %d\n", 2133874aeea5SJeff Kirsher raw_smp_processor_id()); 2134874aeea5SJeff Kirsher BUG_ON(efx->type->monitor == NULL); 2135874aeea5SJeff Kirsher 2136874aeea5SJeff Kirsher /* If the mac_lock is already held then it is likely a port 2137874aeea5SJeff Kirsher * reconfiguration is already in place, which will likely do 2138874aeea5SJeff Kirsher * most of the work of monitor() anyway. */ 2139874aeea5SJeff Kirsher if (mutex_trylock(&efx->mac_lock)) { 2140874aeea5SJeff Kirsher if (efx->port_enabled) 2141874aeea5SJeff Kirsher efx->type->monitor(efx); 2142874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 2143874aeea5SJeff Kirsher } 2144874aeea5SJeff Kirsher 2145874aeea5SJeff Kirsher queue_delayed_work(efx->workqueue, &efx->monitor_work, 2146874aeea5SJeff Kirsher efx_monitor_interval); 2147874aeea5SJeff Kirsher } 2148874aeea5SJeff Kirsher 2149874aeea5SJeff Kirsher /************************************************************************** 2150874aeea5SJeff Kirsher * 2151874aeea5SJeff Kirsher * ioctls 2152874aeea5SJeff Kirsher * 2153874aeea5SJeff Kirsher *************************************************************************/ 2154874aeea5SJeff Kirsher 2155874aeea5SJeff Kirsher /* Net device ioctl 2156874aeea5SJeff Kirsher * Context: process, rtnl_lock() held. 2157874aeea5SJeff Kirsher */ 2158874aeea5SJeff Kirsher static int efx_ioctl(struct net_device *net_dev, struct ifreq *ifr, int cmd) 2159874aeea5SJeff Kirsher { 2160874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 2161874aeea5SJeff Kirsher struct mii_ioctl_data *data = if_mii(ifr); 2162874aeea5SJeff Kirsher 21637c236c43SStuart Hodgson if (cmd == SIOCSHWTSTAMP) 2164433dc9b3SBen Hutchings return efx_ptp_set_ts_config(efx, ifr); 2165433dc9b3SBen Hutchings if (cmd == SIOCGHWTSTAMP) 2166433dc9b3SBen Hutchings return efx_ptp_get_ts_config(efx, ifr); 21677c236c43SStuart Hodgson 2168874aeea5SJeff Kirsher /* Convert phy_id from older PRTAD/DEVAD format */ 2169874aeea5SJeff Kirsher if ((cmd == SIOCGMIIREG || cmd == SIOCSMIIREG) && 2170874aeea5SJeff Kirsher (data->phy_id & 0xfc00) == 0x0400) 2171874aeea5SJeff Kirsher data->phy_id ^= MDIO_PHY_ID_C45 | 0x0400; 2172874aeea5SJeff Kirsher 2173874aeea5SJeff Kirsher return mdio_mii_ioctl(&efx->mdio, data, cmd); 2174874aeea5SJeff Kirsher } 2175874aeea5SJeff Kirsher 2176874aeea5SJeff Kirsher /************************************************************************** 2177874aeea5SJeff Kirsher * 2178874aeea5SJeff Kirsher * NAPI interface 2179874aeea5SJeff Kirsher * 2180874aeea5SJeff Kirsher **************************************************************************/ 2181874aeea5SJeff Kirsher 21827f967c01SBen Hutchings static void efx_init_napi_channel(struct efx_channel *channel) 2183874aeea5SJeff Kirsher { 21847f967c01SBen Hutchings struct efx_nic *efx = channel->efx; 2185874aeea5SJeff Kirsher 2186874aeea5SJeff Kirsher channel->napi_dev = efx->net_dev; 2187874aeea5SJeff Kirsher netif_napi_add(channel->napi_dev, &channel->napi_str, 2188874aeea5SJeff Kirsher efx_poll, napi_weight); 2189874aeea5SJeff Kirsher } 21907f967c01SBen Hutchings 21917f967c01SBen Hutchings static void efx_init_napi(struct efx_nic *efx) 21927f967c01SBen Hutchings { 21937f967c01SBen Hutchings struct efx_channel *channel; 21947f967c01SBen Hutchings 21957f967c01SBen Hutchings efx_for_each_channel(channel, efx) 21967f967c01SBen Hutchings efx_init_napi_channel(channel); 2197874aeea5SJeff Kirsher } 2198874aeea5SJeff Kirsher 2199874aeea5SJeff Kirsher static void efx_fini_napi_channel(struct efx_channel *channel) 2200874aeea5SJeff Kirsher { 2201973334a1SEric Dumazet if (channel->napi_dev) 2202874aeea5SJeff Kirsher netif_napi_del(&channel->napi_str); 2203973334a1SEric Dumazet 2204874aeea5SJeff Kirsher channel->napi_dev = NULL; 2205874aeea5SJeff Kirsher } 2206874aeea5SJeff Kirsher 2207874aeea5SJeff Kirsher static void efx_fini_napi(struct efx_nic *efx) 2208874aeea5SJeff Kirsher { 2209874aeea5SJeff Kirsher struct efx_channel *channel; 2210874aeea5SJeff Kirsher 2211874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) 2212874aeea5SJeff Kirsher efx_fini_napi_channel(channel); 2213874aeea5SJeff Kirsher } 2214874aeea5SJeff Kirsher 2215874aeea5SJeff Kirsher /************************************************************************** 2216874aeea5SJeff Kirsher * 2217874aeea5SJeff Kirsher * Kernel net device interface 2218874aeea5SJeff Kirsher * 2219874aeea5SJeff Kirsher *************************************************************************/ 2220874aeea5SJeff Kirsher 2221874aeea5SJeff Kirsher /* Context: process, rtnl_lock() held. */ 2222e340be92SShradha Shah int efx_net_open(struct net_device *net_dev) 2223874aeea5SJeff Kirsher { 2224874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 22258b7325b4SBen Hutchings int rc; 22268b7325b4SBen Hutchings 2227874aeea5SJeff Kirsher netif_dbg(efx, ifup, efx->net_dev, "opening device on CPU %d\n", 2228874aeea5SJeff Kirsher raw_smp_processor_id()); 2229874aeea5SJeff Kirsher 22308b7325b4SBen Hutchings rc = efx_check_disabled(efx); 22318b7325b4SBen Hutchings if (rc) 22328b7325b4SBen Hutchings return rc; 2233874aeea5SJeff Kirsher if (efx->phy_mode & PHY_MODE_SPECIAL) 2234874aeea5SJeff Kirsher return -EBUSY; 2235874aeea5SJeff Kirsher if (efx_mcdi_poll_reboot(efx) && efx_reset(efx, RESET_TYPE_ALL)) 2236874aeea5SJeff Kirsher return -EIO; 2237874aeea5SJeff Kirsher 2238874aeea5SJeff Kirsher /* Notify the kernel of the link state polled during driver load, 2239874aeea5SJeff Kirsher * before the monitor starts running */ 2240874aeea5SJeff Kirsher efx_link_status_changed(efx); 2241874aeea5SJeff Kirsher 2242874aeea5SJeff Kirsher efx_start_all(efx); 22439c568fd8SPeter Dunning if (efx->state == STATE_DISABLED || efx->reset_pending) 22449c568fd8SPeter Dunning netif_device_detach(efx->net_dev); 2245dd40781eSBen Hutchings efx_selftest_async_start(efx); 2246874aeea5SJeff Kirsher return 0; 2247874aeea5SJeff Kirsher } 2248874aeea5SJeff Kirsher 2249874aeea5SJeff Kirsher /* Context: process, rtnl_lock() held. 2250874aeea5SJeff Kirsher * Note that the kernel will ignore our return code; this method 2251874aeea5SJeff Kirsher * should really be a void. 2252874aeea5SJeff Kirsher */ 2253e340be92SShradha Shah int efx_net_stop(struct net_device *net_dev) 2254874aeea5SJeff Kirsher { 2255874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 2256874aeea5SJeff Kirsher 2257874aeea5SJeff Kirsher netif_dbg(efx, ifdown, efx->net_dev, "closing on CPU %d\n", 2258874aeea5SJeff Kirsher raw_smp_processor_id()); 2259874aeea5SJeff Kirsher 2260874aeea5SJeff Kirsher /* Stop the device and flush all the channels */ 2261874aeea5SJeff Kirsher efx_stop_all(efx); 2262874aeea5SJeff Kirsher 2263874aeea5SJeff Kirsher return 0; 2264874aeea5SJeff Kirsher } 2265874aeea5SJeff Kirsher 2266874aeea5SJeff Kirsher /* Context: process, dev_base_lock or RTNL held, non-blocking. */ 2267bc1f4470Sstephen hemminger static void efx_net_stats(struct net_device *net_dev, 22682aa9ef11SBen Hutchings struct rtnl_link_stats64 *stats) 2269874aeea5SJeff Kirsher { 2270874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 2271874aeea5SJeff Kirsher 2272874aeea5SJeff Kirsher spin_lock_bh(&efx->stats_lock); 2273cd0ecc9aSBen Hutchings efx->type->update_stats(efx, NULL, stats); 22741cb34522SBen Hutchings spin_unlock_bh(&efx->stats_lock); 2275874aeea5SJeff Kirsher } 2276874aeea5SJeff Kirsher 2277874aeea5SJeff Kirsher /* Context: netif_tx_lock held, BHs disabled. */ 2278874aeea5SJeff Kirsher static void efx_watchdog(struct net_device *net_dev) 2279874aeea5SJeff Kirsher { 2280874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 2281874aeea5SJeff Kirsher 2282874aeea5SJeff Kirsher netif_err(efx, tx_err, efx->net_dev, 2283874aeea5SJeff Kirsher "TX stuck with port_enabled=%d: resetting channels\n", 2284874aeea5SJeff Kirsher efx->port_enabled); 2285874aeea5SJeff Kirsher 2286874aeea5SJeff Kirsher efx_schedule_reset(efx, RESET_TYPE_TX_WATCHDOG); 2287874aeea5SJeff Kirsher } 2288874aeea5SJeff Kirsher 2289e45a4fedSCharles McLachlan static unsigned int efx_xdp_max_mtu(struct efx_nic *efx) 2290e45a4fedSCharles McLachlan { 2291e45a4fedSCharles McLachlan /* The maximum MTU that we can fit in a single page, allowing for 2292e45a4fedSCharles McLachlan * framing, overhead and XDP headroom. 2293e45a4fedSCharles McLachlan */ 2294e45a4fedSCharles McLachlan int overhead = EFX_MAX_FRAME_LEN(0) + sizeof(struct efx_rx_page_state) + 2295e45a4fedSCharles McLachlan efx->rx_prefix_size + efx->type->rx_buffer_padding + 2296e45a4fedSCharles McLachlan efx->rx_ip_align + XDP_PACKET_HEADROOM; 2297e45a4fedSCharles McLachlan 2298e45a4fedSCharles McLachlan return PAGE_SIZE - overhead; 2299e45a4fedSCharles McLachlan } 2300874aeea5SJeff Kirsher 2301874aeea5SJeff Kirsher /* Context: process, rtnl_lock() held. */ 2302874aeea5SJeff Kirsher static int efx_change_mtu(struct net_device *net_dev, int new_mtu) 2303874aeea5SJeff Kirsher { 2304874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 23058b7325b4SBen Hutchings int rc; 2306874aeea5SJeff Kirsher 23078b7325b4SBen Hutchings rc = efx_check_disabled(efx); 23088b7325b4SBen Hutchings if (rc) 23098b7325b4SBen Hutchings return rc; 2310874aeea5SJeff Kirsher 2311e45a4fedSCharles McLachlan if (rtnl_dereference(efx->xdp_prog) && 2312e45a4fedSCharles McLachlan new_mtu > efx_xdp_max_mtu(efx)) { 2313e45a4fedSCharles McLachlan netif_err(efx, drv, efx->net_dev, 2314e45a4fedSCharles McLachlan "Requested MTU of %d too big for XDP (max: %d)\n", 2315e45a4fedSCharles McLachlan new_mtu, efx_xdp_max_mtu(efx)); 2316e45a4fedSCharles McLachlan return -EINVAL; 2317e45a4fedSCharles McLachlan } 2318e45a4fedSCharles McLachlan 2319874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "changing MTU to %d\n", new_mtu); 2320874aeea5SJeff Kirsher 232129c69a48SBen Hutchings efx_device_detach_sync(efx); 232229c69a48SBen Hutchings efx_stop_all(efx); 232329c69a48SBen Hutchings 2324874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 2325874aeea5SJeff Kirsher net_dev->mtu = new_mtu; 23260d322413SEdward Cree efx_mac_reconfigure(efx); 2327874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 2328874aeea5SJeff Kirsher 2329874aeea5SJeff Kirsher efx_start_all(efx); 23309c568fd8SPeter Dunning efx_device_attach_if_not_resetting(efx); 23316c8eef4aSBen Hutchings return 0; 2332874aeea5SJeff Kirsher } 2333874aeea5SJeff Kirsher 2334874aeea5SJeff Kirsher static int efx_set_mac_address(struct net_device *net_dev, void *data) 2335874aeea5SJeff Kirsher { 2336874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 2337874aeea5SJeff Kirsher struct sockaddr *addr = data; 2338e0b3ae30SBen Hutchings u8 *new_addr = addr->sa_data; 2339cfc77c2fSShradha Shah u8 old_addr[6]; 2340cfc77c2fSShradha Shah int rc; 2341874aeea5SJeff Kirsher 2342874aeea5SJeff Kirsher if (!is_valid_ether_addr(new_addr)) { 2343874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, 2344874aeea5SJeff Kirsher "invalid ethernet MAC address requested: %pM\n", 2345874aeea5SJeff Kirsher new_addr); 2346504f9b5aSDanny Kukawka return -EADDRNOTAVAIL; 2347874aeea5SJeff Kirsher } 2348874aeea5SJeff Kirsher 2349cfc77c2fSShradha Shah /* save old address */ 2350cfc77c2fSShradha Shah ether_addr_copy(old_addr, net_dev->dev_addr); 2351cd84ff4dSEdward Cree ether_addr_copy(net_dev->dev_addr, new_addr); 2352910c8789SShradha Shah if (efx->type->set_mac_address) { 2353910c8789SShradha Shah rc = efx->type->set_mac_address(efx); 2354cfc77c2fSShradha Shah if (rc) { 2355cfc77c2fSShradha Shah ether_addr_copy(net_dev->dev_addr, old_addr); 2356cfc77c2fSShradha Shah return rc; 2357cfc77c2fSShradha Shah } 2358cfc77c2fSShradha Shah } 2359874aeea5SJeff Kirsher 2360874aeea5SJeff Kirsher /* Reconfigure the MAC */ 2361874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 23620d322413SEdward Cree efx_mac_reconfigure(efx); 2363874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 2364874aeea5SJeff Kirsher 2365874aeea5SJeff Kirsher return 0; 2366874aeea5SJeff Kirsher } 2367874aeea5SJeff Kirsher 2368874aeea5SJeff Kirsher /* Context: netif_addr_lock held, BHs disabled. */ 23690fca8c97SBen Hutchings static void efx_set_rx_mode(struct net_device *net_dev) 2370874aeea5SJeff Kirsher { 2371874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 2372874aeea5SJeff Kirsher 2373874aeea5SJeff Kirsher if (efx->port_enabled) 2374874aeea5SJeff Kirsher queue_work(efx->workqueue, &efx->mac_work); 2375874aeea5SJeff Kirsher /* Otherwise efx_start_port() will do this */ 2376874aeea5SJeff Kirsher } 2377874aeea5SJeff Kirsher 2378c8f44affSMichał Mirosław static int efx_set_features(struct net_device *net_dev, netdev_features_t data) 2379874aeea5SJeff Kirsher { 2380874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 23814a53ea8aSAndrew Rybchenko int rc; 2382874aeea5SJeff Kirsher 2383874aeea5SJeff Kirsher /* If disabling RX n-tuple filtering, clear existing filters */ 23844a53ea8aSAndrew Rybchenko if (net_dev->features & ~data & NETIF_F_NTUPLE) { 23854a53ea8aSAndrew Rybchenko rc = efx->type->filter_clear_rx(efx, EFX_FILTER_PRI_MANUAL); 23864a53ea8aSAndrew Rybchenko if (rc) 23874a53ea8aSAndrew Rybchenko return rc; 23884a53ea8aSAndrew Rybchenko } 23894a53ea8aSAndrew Rybchenko 23906978729fSEdward Cree /* If Rx VLAN filter is changed, update filters via mac_reconfigure. 23916978729fSEdward Cree * If rx-fcs is changed, mac_reconfigure updates that too. 23926978729fSEdward Cree */ 23936978729fSEdward Cree if ((net_dev->features ^ data) & (NETIF_F_HW_VLAN_CTAG_FILTER | 23946978729fSEdward Cree NETIF_F_RXFCS)) { 23954a53ea8aSAndrew Rybchenko /* efx_set_rx_mode() will schedule MAC work to update filters 23964a53ea8aSAndrew Rybchenko * when a new features are finally set in net_dev. 23974a53ea8aSAndrew Rybchenko */ 23984a53ea8aSAndrew Rybchenko efx_set_rx_mode(net_dev); 23994a53ea8aSAndrew Rybchenko } 2400874aeea5SJeff Kirsher 2401874aeea5SJeff Kirsher return 0; 2402874aeea5SJeff Kirsher } 2403874aeea5SJeff Kirsher 2404b40296fcSWei Yongjun static int efx_get_phys_port_id(struct net_device *net_dev, 240508a7b29bSBert Kenward struct netdev_phys_item_id *ppid) 240608a7b29bSBert Kenward { 240708a7b29bSBert Kenward struct efx_nic *efx = netdev_priv(net_dev); 240808a7b29bSBert Kenward 240908a7b29bSBert Kenward if (efx->type->get_phys_port_id) 241008a7b29bSBert Kenward return efx->type->get_phys_port_id(efx, ppid); 241108a7b29bSBert Kenward else 241208a7b29bSBert Kenward return -EOPNOTSUPP; 241308a7b29bSBert Kenward } 241408a7b29bSBert Kenward 2415ac019f08SBert Kenward static int efx_get_phys_port_name(struct net_device *net_dev, 2416ac019f08SBert Kenward char *name, size_t len) 2417ac019f08SBert Kenward { 2418ac019f08SBert Kenward struct efx_nic *efx = netdev_priv(net_dev); 2419ac019f08SBert Kenward 2420ac019f08SBert Kenward if (snprintf(name, len, "p%u", efx->port_num) >= len) 2421ac019f08SBert Kenward return -EINVAL; 2422ac019f08SBert Kenward return 0; 2423ac019f08SBert Kenward } 2424ac019f08SBert Kenward 24254a53ea8aSAndrew Rybchenko static int efx_vlan_rx_add_vid(struct net_device *net_dev, __be16 proto, u16 vid) 24264a53ea8aSAndrew Rybchenko { 24274a53ea8aSAndrew Rybchenko struct efx_nic *efx = netdev_priv(net_dev); 24284a53ea8aSAndrew Rybchenko 24294a53ea8aSAndrew Rybchenko if (efx->type->vlan_rx_add_vid) 24304a53ea8aSAndrew Rybchenko return efx->type->vlan_rx_add_vid(efx, proto, vid); 24314a53ea8aSAndrew Rybchenko else 24324a53ea8aSAndrew Rybchenko return -EOPNOTSUPP; 24334a53ea8aSAndrew Rybchenko } 24344a53ea8aSAndrew Rybchenko 24354a53ea8aSAndrew Rybchenko static int efx_vlan_rx_kill_vid(struct net_device *net_dev, __be16 proto, u16 vid) 24364a53ea8aSAndrew Rybchenko { 24374a53ea8aSAndrew Rybchenko struct efx_nic *efx = netdev_priv(net_dev); 24384a53ea8aSAndrew Rybchenko 24394a53ea8aSAndrew Rybchenko if (efx->type->vlan_rx_kill_vid) 24404a53ea8aSAndrew Rybchenko return efx->type->vlan_rx_kill_vid(efx, proto, vid); 24414a53ea8aSAndrew Rybchenko else 24424a53ea8aSAndrew Rybchenko return -EOPNOTSUPP; 24434a53ea8aSAndrew Rybchenko } 24444a53ea8aSAndrew Rybchenko 2445e5fbd977SJon Cooper static int efx_udp_tunnel_type_map(enum udp_parsable_tunnel_type in) 2446e5fbd977SJon Cooper { 2447e5fbd977SJon Cooper switch (in) { 2448e5fbd977SJon Cooper case UDP_TUNNEL_TYPE_VXLAN: 2449e5fbd977SJon Cooper return TUNNEL_ENCAP_UDP_PORT_ENTRY_VXLAN; 2450e5fbd977SJon Cooper case UDP_TUNNEL_TYPE_GENEVE: 2451e5fbd977SJon Cooper return TUNNEL_ENCAP_UDP_PORT_ENTRY_GENEVE; 2452e5fbd977SJon Cooper default: 2453e5fbd977SJon Cooper return -1; 2454e5fbd977SJon Cooper } 2455e5fbd977SJon Cooper } 2456e5fbd977SJon Cooper 2457e5fbd977SJon Cooper static void efx_udp_tunnel_add(struct net_device *dev, struct udp_tunnel_info *ti) 2458e5fbd977SJon Cooper { 2459e5fbd977SJon Cooper struct efx_nic *efx = netdev_priv(dev); 2460e5fbd977SJon Cooper struct efx_udp_tunnel tnl; 2461e5fbd977SJon Cooper int efx_tunnel_type; 2462e5fbd977SJon Cooper 2463e5fbd977SJon Cooper efx_tunnel_type = efx_udp_tunnel_type_map(ti->type); 2464e5fbd977SJon Cooper if (efx_tunnel_type < 0) 2465e5fbd977SJon Cooper return; 2466e5fbd977SJon Cooper 2467e5fbd977SJon Cooper tnl.type = (u16)efx_tunnel_type; 2468e5fbd977SJon Cooper tnl.port = ti->port; 2469e5fbd977SJon Cooper 2470e5fbd977SJon Cooper if (efx->type->udp_tnl_add_port) 2471e5fbd977SJon Cooper (void)efx->type->udp_tnl_add_port(efx, tnl); 2472e5fbd977SJon Cooper } 2473e5fbd977SJon Cooper 2474e5fbd977SJon Cooper static void efx_udp_tunnel_del(struct net_device *dev, struct udp_tunnel_info *ti) 2475e5fbd977SJon Cooper { 2476e5fbd977SJon Cooper struct efx_nic *efx = netdev_priv(dev); 2477e5fbd977SJon Cooper struct efx_udp_tunnel tnl; 2478e5fbd977SJon Cooper int efx_tunnel_type; 2479e5fbd977SJon Cooper 2480e5fbd977SJon Cooper efx_tunnel_type = efx_udp_tunnel_type_map(ti->type); 2481e5fbd977SJon Cooper if (efx_tunnel_type < 0) 2482e5fbd977SJon Cooper return; 2483e5fbd977SJon Cooper 2484e5fbd977SJon Cooper tnl.type = (u16)efx_tunnel_type; 2485e5fbd977SJon Cooper tnl.port = ti->port; 2486e5fbd977SJon Cooper 2487c04ca616SDan Carpenter if (efx->type->udp_tnl_del_port) 2488e5fbd977SJon Cooper (void)efx->type->udp_tnl_del_port(efx, tnl); 2489e5fbd977SJon Cooper } 2490e5fbd977SJon Cooper 24917fa8d547SShradha Shah static const struct net_device_ops efx_netdev_ops = { 2492874aeea5SJeff Kirsher .ndo_open = efx_net_open, 2493874aeea5SJeff Kirsher .ndo_stop = efx_net_stop, 2494874aeea5SJeff Kirsher .ndo_get_stats64 = efx_net_stats, 2495874aeea5SJeff Kirsher .ndo_tx_timeout = efx_watchdog, 2496874aeea5SJeff Kirsher .ndo_start_xmit = efx_hard_start_xmit, 2497874aeea5SJeff Kirsher .ndo_validate_addr = eth_validate_addr, 2498874aeea5SJeff Kirsher .ndo_do_ioctl = efx_ioctl, 2499874aeea5SJeff Kirsher .ndo_change_mtu = efx_change_mtu, 2500874aeea5SJeff Kirsher .ndo_set_mac_address = efx_set_mac_address, 25010fca8c97SBen Hutchings .ndo_set_rx_mode = efx_set_rx_mode, 2502874aeea5SJeff Kirsher .ndo_set_features = efx_set_features, 25034a53ea8aSAndrew Rybchenko .ndo_vlan_rx_add_vid = efx_vlan_rx_add_vid, 25044a53ea8aSAndrew Rybchenko .ndo_vlan_rx_kill_vid = efx_vlan_rx_kill_vid, 2505cd2d5b52SBen Hutchings #ifdef CONFIG_SFC_SRIOV 25067fa8d547SShradha Shah .ndo_set_vf_mac = efx_sriov_set_vf_mac, 25077fa8d547SShradha Shah .ndo_set_vf_vlan = efx_sriov_set_vf_vlan, 25087fa8d547SShradha Shah .ndo_set_vf_spoofchk = efx_sriov_set_vf_spoofchk, 25097fa8d547SShradha Shah .ndo_get_vf_config = efx_sriov_get_vf_config, 25104392dc69SEdward Cree .ndo_set_vf_link_state = efx_sriov_set_vf_link_state, 2511cd2d5b52SBen Hutchings #endif 251208a7b29bSBert Kenward .ndo_get_phys_port_id = efx_get_phys_port_id, 2513ac019f08SBert Kenward .ndo_get_phys_port_name = efx_get_phys_port_name, 2514874aeea5SJeff Kirsher .ndo_setup_tc = efx_setup_tc, 2515874aeea5SJeff Kirsher #ifdef CONFIG_RFS_ACCEL 2516874aeea5SJeff Kirsher .ndo_rx_flow_steer = efx_filter_rfs, 2517874aeea5SJeff Kirsher #endif 2518e5fbd977SJon Cooper .ndo_udp_tunnel_add = efx_udp_tunnel_add, 2519e5fbd977SJon Cooper .ndo_udp_tunnel_del = efx_udp_tunnel_del, 2520e45a4fedSCharles McLachlan .ndo_bpf = efx_xdp 2521874aeea5SJeff Kirsher }; 2522874aeea5SJeff Kirsher 2523e45a4fedSCharles McLachlan static int efx_xdp_setup_prog(struct efx_nic *efx, struct bpf_prog *prog) 2524e45a4fedSCharles McLachlan { 2525e45a4fedSCharles McLachlan struct bpf_prog *old_prog; 2526e45a4fedSCharles McLachlan 2527e45a4fedSCharles McLachlan if (efx->xdp_rxq_info_failed) { 2528e45a4fedSCharles McLachlan netif_err(efx, drv, efx->net_dev, 2529e45a4fedSCharles McLachlan "Unable to bind XDP program due to previous failure of rxq_info\n"); 2530e45a4fedSCharles McLachlan return -EINVAL; 2531e45a4fedSCharles McLachlan } 2532e45a4fedSCharles McLachlan 2533e45a4fedSCharles McLachlan if (prog && efx->net_dev->mtu > efx_xdp_max_mtu(efx)) { 2534e45a4fedSCharles McLachlan netif_err(efx, drv, efx->net_dev, 2535e45a4fedSCharles McLachlan "Unable to configure XDP with MTU of %d (max: %d)\n", 2536e45a4fedSCharles McLachlan efx->net_dev->mtu, efx_xdp_max_mtu(efx)); 2537e45a4fedSCharles McLachlan return -EINVAL; 2538e45a4fedSCharles McLachlan } 2539e45a4fedSCharles McLachlan 2540e45a4fedSCharles McLachlan old_prog = rtnl_dereference(efx->xdp_prog); 2541e45a4fedSCharles McLachlan rcu_assign_pointer(efx->xdp_prog, prog); 2542e45a4fedSCharles McLachlan /* Release the reference that was originally passed by the caller. */ 2543e45a4fedSCharles McLachlan if (old_prog) 2544e45a4fedSCharles McLachlan bpf_prog_put(old_prog); 2545e45a4fedSCharles McLachlan 2546e45a4fedSCharles McLachlan return 0; 2547e45a4fedSCharles McLachlan } 2548e45a4fedSCharles McLachlan 2549e45a4fedSCharles McLachlan /* Context: process, rtnl_lock() held. */ 2550e45a4fedSCharles McLachlan static int efx_xdp(struct net_device *dev, struct netdev_bpf *xdp) 2551e45a4fedSCharles McLachlan { 2552e45a4fedSCharles McLachlan struct efx_nic *efx = netdev_priv(dev); 2553e45a4fedSCharles McLachlan struct bpf_prog *xdp_prog; 2554e45a4fedSCharles McLachlan 2555e45a4fedSCharles McLachlan switch (xdp->command) { 2556e45a4fedSCharles McLachlan case XDP_SETUP_PROG: 2557e45a4fedSCharles McLachlan return efx_xdp_setup_prog(efx, xdp->prog); 2558e45a4fedSCharles McLachlan case XDP_QUERY_PROG: 2559e45a4fedSCharles McLachlan xdp_prog = rtnl_dereference(efx->xdp_prog); 2560e45a4fedSCharles McLachlan xdp->prog_id = xdp_prog ? xdp_prog->aux->id : 0; 2561e45a4fedSCharles McLachlan return 0; 2562e45a4fedSCharles McLachlan default: 2563e45a4fedSCharles McLachlan return -EINVAL; 2564e45a4fedSCharles McLachlan } 2565e45a4fedSCharles McLachlan } 2566e45a4fedSCharles McLachlan 2567874aeea5SJeff Kirsher static void efx_update_name(struct efx_nic *efx) 2568874aeea5SJeff Kirsher { 2569874aeea5SJeff Kirsher strcpy(efx->name, efx->net_dev->name); 2570874aeea5SJeff Kirsher efx_mtd_rename(efx); 2571874aeea5SJeff Kirsher efx_set_channel_names(efx); 2572874aeea5SJeff Kirsher } 2573874aeea5SJeff Kirsher 2574874aeea5SJeff Kirsher static int efx_netdev_event(struct notifier_block *this, 2575874aeea5SJeff Kirsher unsigned long event, void *ptr) 2576874aeea5SJeff Kirsher { 2577351638e7SJiri Pirko struct net_device *net_dev = netdev_notifier_info_to_dev(ptr); 2578874aeea5SJeff Kirsher 25797fa8d547SShradha Shah if ((net_dev->netdev_ops == &efx_netdev_ops) && 2580874aeea5SJeff Kirsher event == NETDEV_CHANGENAME) 2581874aeea5SJeff Kirsher efx_update_name(netdev_priv(net_dev)); 2582874aeea5SJeff Kirsher 2583874aeea5SJeff Kirsher return NOTIFY_DONE; 2584874aeea5SJeff Kirsher } 2585874aeea5SJeff Kirsher 2586874aeea5SJeff Kirsher static struct notifier_block efx_netdev_notifier = { 2587874aeea5SJeff Kirsher .notifier_call = efx_netdev_event, 2588874aeea5SJeff Kirsher }; 2589874aeea5SJeff Kirsher 2590874aeea5SJeff Kirsher static ssize_t 2591874aeea5SJeff Kirsher show_phy_type(struct device *dev, struct device_attribute *attr, char *buf) 2592874aeea5SJeff Kirsher { 25933e03a8baSChuhong Yuan struct efx_nic *efx = dev_get_drvdata(dev); 2594874aeea5SJeff Kirsher return sprintf(buf, "%d\n", efx->phy_type); 2595874aeea5SJeff Kirsher } 2596776fbcc9SBen Hutchings static DEVICE_ATTR(phy_type, 0444, show_phy_type, NULL); 2597874aeea5SJeff Kirsher 2598e7fef9b4SEdward Cree #ifdef CONFIG_SFC_MCDI_LOGGING 2599e7fef9b4SEdward Cree static ssize_t show_mcdi_log(struct device *dev, struct device_attribute *attr, 2600e7fef9b4SEdward Cree char *buf) 2601e7fef9b4SEdward Cree { 26023e03a8baSChuhong Yuan struct efx_nic *efx = dev_get_drvdata(dev); 2603e7fef9b4SEdward Cree struct efx_mcdi_iface *mcdi = efx_mcdi(efx); 2604e7fef9b4SEdward Cree 2605e7fef9b4SEdward Cree return scnprintf(buf, PAGE_SIZE, "%d\n", mcdi->logging_enabled); 2606e7fef9b4SEdward Cree } 2607e7fef9b4SEdward Cree static ssize_t set_mcdi_log(struct device *dev, struct device_attribute *attr, 2608e7fef9b4SEdward Cree const char *buf, size_t count) 2609e7fef9b4SEdward Cree { 26103e03a8baSChuhong Yuan struct efx_nic *efx = dev_get_drvdata(dev); 2611e7fef9b4SEdward Cree struct efx_mcdi_iface *mcdi = efx_mcdi(efx); 2612e7fef9b4SEdward Cree bool enable = count > 0 && *buf != '0'; 2613e7fef9b4SEdward Cree 2614e7fef9b4SEdward Cree mcdi->logging_enabled = enable; 2615e7fef9b4SEdward Cree return count; 2616e7fef9b4SEdward Cree } 2617e7fef9b4SEdward Cree static DEVICE_ATTR(mcdi_logging, 0644, show_mcdi_log, set_mcdi_log); 2618e7fef9b4SEdward Cree #endif 2619e7fef9b4SEdward Cree 2620874aeea5SJeff Kirsher static int efx_register_netdev(struct efx_nic *efx) 2621874aeea5SJeff Kirsher { 2622874aeea5SJeff Kirsher struct net_device *net_dev = efx->net_dev; 2623874aeea5SJeff Kirsher struct efx_channel *channel; 2624874aeea5SJeff Kirsher int rc; 2625874aeea5SJeff Kirsher 2626874aeea5SJeff Kirsher net_dev->watchdog_timeo = 5 * HZ; 2627874aeea5SJeff Kirsher net_dev->irq = efx->pci_dev->irq; 26287fa8d547SShradha Shah net_dev->netdev_ops = &efx_netdev_ops; 26297fa8d547SShradha Shah if (efx_nic_rev(efx) >= EFX_REV_HUNT_A0) 26308127d661SBen Hutchings net_dev->priv_flags |= IFF_UNICAST_FLT; 26317ad24ea4SWilfried Klaebe net_dev->ethtool_ops = &efx_ethtool_ops; 26327e6d06f0SBen Hutchings net_dev->gso_max_segs = EFX_TSO_MAX_SEGS; 2633cd94e519SBert Kenward net_dev->min_mtu = EFX_MIN_MTU; 2634cd94e519SBert Kenward net_dev->max_mtu = EFX_MAX_MTU; 2635874aeea5SJeff Kirsher 2636874aeea5SJeff Kirsher rtnl_lock(); 2637874aeea5SJeff Kirsher 26387153f623SBen Hutchings /* Enable resets to be scheduled and check whether any were 26397153f623SBen Hutchings * already requested. If so, the NIC is probably hosed so we 26407153f623SBen Hutchings * abort. 26417153f623SBen Hutchings */ 26427153f623SBen Hutchings efx->state = STATE_READY; 26437153f623SBen Hutchings smp_mb(); /* ensure we change state before checking reset_pending */ 26447153f623SBen Hutchings if (efx->reset_pending) { 26457153f623SBen Hutchings netif_err(efx, probe, efx->net_dev, 26467153f623SBen Hutchings "aborting probe due to scheduled reset\n"); 26477153f623SBen Hutchings rc = -EIO; 26487153f623SBen Hutchings goto fail_locked; 26497153f623SBen Hutchings } 26507153f623SBen Hutchings 2651874aeea5SJeff Kirsher rc = dev_alloc_name(net_dev, net_dev->name); 2652874aeea5SJeff Kirsher if (rc < 0) 2653874aeea5SJeff Kirsher goto fail_locked; 2654874aeea5SJeff Kirsher efx_update_name(efx); 2655874aeea5SJeff Kirsher 26568f8b3d51SBen Hutchings /* Always start with carrier off; PHY events will detect the link */ 26578f8b3d51SBen Hutchings netif_carrier_off(net_dev); 26588f8b3d51SBen Hutchings 2659874aeea5SJeff Kirsher rc = register_netdevice(net_dev); 2660874aeea5SJeff Kirsher if (rc) 2661874aeea5SJeff Kirsher goto fail_locked; 2662874aeea5SJeff Kirsher 2663874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) { 2664874aeea5SJeff Kirsher struct efx_tx_queue *tx_queue; 2665874aeea5SJeff Kirsher efx_for_each_channel_tx_queue(tx_queue, channel) 2666874aeea5SJeff Kirsher efx_init_tx_queue_core_txq(tx_queue); 2667874aeea5SJeff Kirsher } 2668874aeea5SJeff Kirsher 26690bcf4a64SBen Hutchings efx_associate(efx); 26700bcf4a64SBen Hutchings 2671874aeea5SJeff Kirsher rtnl_unlock(); 2672874aeea5SJeff Kirsher 2673874aeea5SJeff Kirsher rc = device_create_file(&efx->pci_dev->dev, &dev_attr_phy_type); 2674874aeea5SJeff Kirsher if (rc) { 2675874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, 2676874aeea5SJeff Kirsher "failed to init net dev attributes\n"); 2677874aeea5SJeff Kirsher goto fail_registered; 2678874aeea5SJeff Kirsher } 2679e7fef9b4SEdward Cree #ifdef CONFIG_SFC_MCDI_LOGGING 2680e7fef9b4SEdward Cree rc = device_create_file(&efx->pci_dev->dev, &dev_attr_mcdi_logging); 2681e7fef9b4SEdward Cree if (rc) { 2682e7fef9b4SEdward Cree netif_err(efx, drv, efx->net_dev, 2683e7fef9b4SEdward Cree "failed to init net dev attributes\n"); 2684e7fef9b4SEdward Cree goto fail_attr_mcdi_logging; 2685e7fef9b4SEdward Cree } 2686e7fef9b4SEdward Cree #endif 2687874aeea5SJeff Kirsher 2688874aeea5SJeff Kirsher return 0; 2689874aeea5SJeff Kirsher 2690e7fef9b4SEdward Cree #ifdef CONFIG_SFC_MCDI_LOGGING 2691e7fef9b4SEdward Cree fail_attr_mcdi_logging: 2692e7fef9b4SEdward Cree device_remove_file(&efx->pci_dev->dev, &dev_attr_phy_type); 2693e7fef9b4SEdward Cree #endif 26947153f623SBen Hutchings fail_registered: 26957153f623SBen Hutchings rtnl_lock(); 26960bcf4a64SBen Hutchings efx_dissociate(efx); 26977153f623SBen Hutchings unregister_netdevice(net_dev); 2698874aeea5SJeff Kirsher fail_locked: 26997153f623SBen Hutchings efx->state = STATE_UNINIT; 2700874aeea5SJeff Kirsher rtnl_unlock(); 2701874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, "could not register net dev\n"); 2702874aeea5SJeff Kirsher return rc; 2703874aeea5SJeff Kirsher } 2704874aeea5SJeff Kirsher 2705874aeea5SJeff Kirsher static void efx_unregister_netdev(struct efx_nic *efx) 2706874aeea5SJeff Kirsher { 2707874aeea5SJeff Kirsher if (!efx->net_dev) 2708874aeea5SJeff Kirsher return; 2709874aeea5SJeff Kirsher 2710874aeea5SJeff Kirsher BUG_ON(netdev_priv(efx->net_dev) != efx); 2711874aeea5SJeff Kirsher 2712e7fef9b4SEdward Cree if (efx_dev_registered(efx)) { 2713874aeea5SJeff Kirsher strlcpy(efx->name, pci_name(efx->pci_dev), sizeof(efx->name)); 2714e7fef9b4SEdward Cree #ifdef CONFIG_SFC_MCDI_LOGGING 2715e7fef9b4SEdward Cree device_remove_file(&efx->pci_dev->dev, &dev_attr_mcdi_logging); 2716e7fef9b4SEdward Cree #endif 2717874aeea5SJeff Kirsher device_remove_file(&efx->pci_dev->dev, &dev_attr_phy_type); 2718e7fef9b4SEdward Cree unregister_netdev(efx->net_dev); 2719e7fef9b4SEdward Cree } 2720874aeea5SJeff Kirsher } 2721874aeea5SJeff Kirsher 2722874aeea5SJeff Kirsher /************************************************************************** 2723874aeea5SJeff Kirsher * 2724874aeea5SJeff Kirsher * Device reset and suspend 2725874aeea5SJeff Kirsher * 2726874aeea5SJeff Kirsher **************************************************************************/ 2727874aeea5SJeff Kirsher 2728874aeea5SJeff Kirsher /* Tears down the entire software state and most of the hardware state 2729874aeea5SJeff Kirsher * before reset. */ 2730874aeea5SJeff Kirsher void efx_reset_down(struct efx_nic *efx, enum reset_type method) 2731874aeea5SJeff Kirsher { 2732874aeea5SJeff Kirsher EFX_ASSERT_RESET_SERIALISED(efx); 2733874aeea5SJeff Kirsher 2734e283546cSEdward Cree if (method == RESET_TYPE_MCDI_TIMEOUT) 2735e283546cSEdward Cree efx->type->prepare_flr(efx); 2736e283546cSEdward Cree 2737874aeea5SJeff Kirsher efx_stop_all(efx); 2738d8291187SBen Hutchings efx_disable_interrupts(efx); 27395642ceefSBen Hutchings 27405642ceefSBen Hutchings mutex_lock(&efx->mac_lock); 2741193f2003SBert Kenward down_write(&efx->filter_sem); 2742e0a65e3cSEdward Cree mutex_lock(&efx->rss_lock); 2743087e9025SJon Cooper if (efx->port_initialized && method != RESET_TYPE_INVISIBLE && 2744087e9025SJon Cooper method != RESET_TYPE_DATAPATH) 2745874aeea5SJeff Kirsher efx->phy_op->fini(efx); 2746874aeea5SJeff Kirsher efx->type->fini(efx); 2747874aeea5SJeff Kirsher } 2748874aeea5SJeff Kirsher 2749874aeea5SJeff Kirsher /* This function will always ensure that the locks acquired in 2750874aeea5SJeff Kirsher * efx_reset_down() are released. A failure return code indicates 2751874aeea5SJeff Kirsher * that we were unable to reinitialise the hardware, and the 2752874aeea5SJeff Kirsher * driver should be disabled. If ok is false, then the rx and tx 2753874aeea5SJeff Kirsher * engines are not restarted, pending a RESET_DISABLE. */ 2754874aeea5SJeff Kirsher int efx_reset_up(struct efx_nic *efx, enum reset_type method, bool ok) 2755874aeea5SJeff Kirsher { 2756874aeea5SJeff Kirsher int rc; 2757874aeea5SJeff Kirsher 2758874aeea5SJeff Kirsher EFX_ASSERT_RESET_SERIALISED(efx); 2759874aeea5SJeff Kirsher 2760e283546cSEdward Cree if (method == RESET_TYPE_MCDI_TIMEOUT) 2761e283546cSEdward Cree efx->type->finish_flr(efx); 2762e283546cSEdward Cree 2763e283546cSEdward Cree /* Ensure that SRAM is initialised even if we're disabling the device */ 2764874aeea5SJeff Kirsher rc = efx->type->init(efx); 2765874aeea5SJeff Kirsher if (rc) { 2766874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, "failed to initialise NIC\n"); 2767874aeea5SJeff Kirsher goto fail; 2768874aeea5SJeff Kirsher } 2769874aeea5SJeff Kirsher 2770874aeea5SJeff Kirsher if (!ok) 2771874aeea5SJeff Kirsher goto fail; 2772874aeea5SJeff Kirsher 2773087e9025SJon Cooper if (efx->port_initialized && method != RESET_TYPE_INVISIBLE && 2774087e9025SJon Cooper method != RESET_TYPE_DATAPATH) { 2775874aeea5SJeff Kirsher rc = efx->phy_op->init(efx); 2776874aeea5SJeff Kirsher if (rc) 2777874aeea5SJeff Kirsher goto fail; 2778267d9d73SEdward Cree rc = efx->phy_op->reconfigure(efx); 2779267d9d73SEdward Cree if (rc && rc != -EPERM) 2780874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, 2781874aeea5SJeff Kirsher "could not restore PHY settings\n"); 2782874aeea5SJeff Kirsher } 2783874aeea5SJeff Kirsher 2784261e4d96SJon Cooper rc = efx_enable_interrupts(efx); 2785261e4d96SJon Cooper if (rc) 2786261e4d96SJon Cooper goto fail; 27876d8aaaf6SDaniel Pieczko 27886d8aaaf6SDaniel Pieczko #ifdef CONFIG_SFC_SRIOV 27896d8aaaf6SDaniel Pieczko rc = efx->type->vswitching_restore(efx); 27906d8aaaf6SDaniel Pieczko if (rc) /* not fatal; the PF will still work fine */ 27916d8aaaf6SDaniel Pieczko netif_warn(efx, probe, efx->net_dev, 27926d8aaaf6SDaniel Pieczko "failed to restore vswitching rc=%d;" 27936d8aaaf6SDaniel Pieczko " VFs may not function\n", rc); 27946d8aaaf6SDaniel Pieczko #endif 27956d8aaaf6SDaniel Pieczko 279642356d9aSEdward Cree if (efx->type->rx_restore_rss_contexts) 279742356d9aSEdward Cree efx->type->rx_restore_rss_contexts(efx); 2798e0a65e3cSEdward Cree mutex_unlock(&efx->rss_lock); 2799193f2003SBert Kenward efx->type->filter_table_restore(efx); 2800193f2003SBert Kenward up_write(&efx->filter_sem); 28017fa8d547SShradha Shah if (efx->type->sriov_reset) 2802d98a4ffeSShradha Shah efx->type->sriov_reset(efx); 2803874aeea5SJeff Kirsher 2804874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 2805874aeea5SJeff Kirsher 2806874aeea5SJeff Kirsher efx_start_all(efx); 2807874aeea5SJeff Kirsher 2808e5fbd977SJon Cooper if (efx->type->udp_tnl_push_ports) 2809e5fbd977SJon Cooper efx->type->udp_tnl_push_ports(efx); 2810e5fbd977SJon Cooper 2811874aeea5SJeff Kirsher return 0; 2812874aeea5SJeff Kirsher 2813874aeea5SJeff Kirsher fail: 2814874aeea5SJeff Kirsher efx->port_initialized = false; 2815874aeea5SJeff Kirsher 2816e0a65e3cSEdward Cree mutex_unlock(&efx->rss_lock); 2817193f2003SBert Kenward up_write(&efx->filter_sem); 2818874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 2819874aeea5SJeff Kirsher 2820874aeea5SJeff Kirsher return rc; 2821874aeea5SJeff Kirsher } 2822874aeea5SJeff Kirsher 2823874aeea5SJeff Kirsher /* Reset the NIC using the specified method. Note that the reset may 2824874aeea5SJeff Kirsher * fail, in which case the card will be left in an unusable state. 2825874aeea5SJeff Kirsher * 2826874aeea5SJeff Kirsher * Caller must hold the rtnl_lock. 2827874aeea5SJeff Kirsher */ 2828874aeea5SJeff Kirsher int efx_reset(struct efx_nic *efx, enum reset_type method) 2829874aeea5SJeff Kirsher { 2830874aeea5SJeff Kirsher int rc, rc2; 2831874aeea5SJeff Kirsher bool disabled; 2832874aeea5SJeff Kirsher 2833874aeea5SJeff Kirsher netif_info(efx, drv, efx->net_dev, "resetting (%s)\n", 2834874aeea5SJeff Kirsher RESET_TYPE(method)); 2835874aeea5SJeff Kirsher 2836c2f3b8e3SDaniel Pieczko efx_device_detach_sync(efx); 2837874aeea5SJeff Kirsher efx_reset_down(efx, method); 2838874aeea5SJeff Kirsher 2839874aeea5SJeff Kirsher rc = efx->type->reset(efx, method); 2840874aeea5SJeff Kirsher if (rc) { 2841874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, "failed to reset hardware\n"); 2842874aeea5SJeff Kirsher goto out; 2843874aeea5SJeff Kirsher } 2844874aeea5SJeff Kirsher 2845874aeea5SJeff Kirsher /* Clear flags for the scopes we covered. We assume the NIC and 2846874aeea5SJeff Kirsher * driver are now quiescent so that there is no race here. 2847874aeea5SJeff Kirsher */ 2848e283546cSEdward Cree if (method < RESET_TYPE_MAX_METHOD) 2849874aeea5SJeff Kirsher efx->reset_pending &= -(1 << (method + 1)); 2850e283546cSEdward Cree else /* it doesn't fit into the well-ordered scope hierarchy */ 2851e283546cSEdward Cree __clear_bit(method, &efx->reset_pending); 2852874aeea5SJeff Kirsher 2853874aeea5SJeff Kirsher /* Reinitialise bus-mastering, which may have been turned off before 2854874aeea5SJeff Kirsher * the reset was scheduled. This is still appropriate, even in the 2855874aeea5SJeff Kirsher * RESET_TYPE_DISABLE since this driver generally assumes the hardware 2856874aeea5SJeff Kirsher * can respond to requests. */ 2857874aeea5SJeff Kirsher pci_set_master(efx->pci_dev); 2858874aeea5SJeff Kirsher 2859874aeea5SJeff Kirsher out: 2860874aeea5SJeff Kirsher /* Leave device stopped if necessary */ 2861626950dbSAlexandre Rames disabled = rc || 2862626950dbSAlexandre Rames method == RESET_TYPE_DISABLE || 2863626950dbSAlexandre Rames method == RESET_TYPE_RECOVER_OR_DISABLE; 2864874aeea5SJeff Kirsher rc2 = efx_reset_up(efx, method, !disabled); 2865874aeea5SJeff Kirsher if (rc2) { 2866874aeea5SJeff Kirsher disabled = true; 2867874aeea5SJeff Kirsher if (!rc) 2868874aeea5SJeff Kirsher rc = rc2; 2869874aeea5SJeff Kirsher } 2870874aeea5SJeff Kirsher 2871874aeea5SJeff Kirsher if (disabled) { 2872874aeea5SJeff Kirsher dev_close(efx->net_dev); 2873874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, "has been disabled\n"); 2874874aeea5SJeff Kirsher efx->state = STATE_DISABLED; 2875874aeea5SJeff Kirsher } else { 2876874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "reset complete\n"); 28779c568fd8SPeter Dunning efx_device_attach_if_not_resetting(efx); 2878874aeea5SJeff Kirsher } 2879874aeea5SJeff Kirsher return rc; 2880874aeea5SJeff Kirsher } 2881874aeea5SJeff Kirsher 2882626950dbSAlexandre Rames /* Try recovery mechanisms. 2883626950dbSAlexandre Rames * For now only EEH is supported. 2884626950dbSAlexandre Rames * Returns 0 if the recovery mechanisms are unsuccessful. 2885626950dbSAlexandre Rames * Returns a non-zero value otherwise. 2886626950dbSAlexandre Rames */ 2887b28405b0SAlexandre Rames int efx_try_recovery(struct efx_nic *efx) 2888626950dbSAlexandre Rames { 2889626950dbSAlexandre Rames #ifdef CONFIG_EEH 2890626950dbSAlexandre Rames /* A PCI error can occur and not be seen by EEH because nothing 2891626950dbSAlexandre Rames * happens on the PCI bus. In this case the driver may fail and 2892626950dbSAlexandre Rames * schedule a 'recover or reset', leading to this recovery handler. 2893626950dbSAlexandre Rames * Manually call the eeh failure check function. 2894626950dbSAlexandre Rames */ 289512a89dbaSBenjamin Herrenschmidt struct eeh_dev *eehdev = pci_dev_to_eeh_dev(efx->pci_dev); 2896626950dbSAlexandre Rames if (eeh_dev_check_failure(eehdev)) { 2897626950dbSAlexandre Rames /* The EEH mechanisms will handle the error and reset the 2898626950dbSAlexandre Rames * device if necessary. 2899626950dbSAlexandre Rames */ 2900626950dbSAlexandre Rames return 1; 2901626950dbSAlexandre Rames } 2902626950dbSAlexandre Rames #endif 2903626950dbSAlexandre Rames return 0; 2904626950dbSAlexandre Rames } 2905626950dbSAlexandre Rames 290674cd60a4SJon Cooper static void efx_wait_for_bist_end(struct efx_nic *efx) 290774cd60a4SJon Cooper { 290874cd60a4SJon Cooper int i; 290974cd60a4SJon Cooper 291074cd60a4SJon Cooper for (i = 0; i < BIST_WAIT_DELAY_COUNT; ++i) { 291174cd60a4SJon Cooper if (efx_mcdi_poll_reboot(efx)) 291274cd60a4SJon Cooper goto out; 291374cd60a4SJon Cooper msleep(BIST_WAIT_DELAY_MS); 291474cd60a4SJon Cooper } 291574cd60a4SJon Cooper 291674cd60a4SJon Cooper netif_err(efx, drv, efx->net_dev, "Warning: No MC reboot after BIST mode\n"); 291774cd60a4SJon Cooper out: 291874cd60a4SJon Cooper /* Either way unset the BIST flag. If we found no reboot we probably 291974cd60a4SJon Cooper * won't recover, but we should try. 292074cd60a4SJon Cooper */ 292174cd60a4SJon Cooper efx->mc_bist_for_other_fn = false; 292274cd60a4SJon Cooper } 292374cd60a4SJon Cooper 2924874aeea5SJeff Kirsher /* The worker thread exists so that code that cannot sleep can 2925874aeea5SJeff Kirsher * schedule a reset for later. 2926874aeea5SJeff Kirsher */ 2927874aeea5SJeff Kirsher static void efx_reset_work(struct work_struct *data) 2928874aeea5SJeff Kirsher { 2929874aeea5SJeff Kirsher struct efx_nic *efx = container_of(data, struct efx_nic, reset_work); 2930626950dbSAlexandre Rames unsigned long pending; 2931626950dbSAlexandre Rames enum reset_type method; 2932626950dbSAlexandre Rames 29336aa7de05SMark Rutland pending = READ_ONCE(efx->reset_pending); 2934626950dbSAlexandre Rames method = fls(pending) - 1; 2935626950dbSAlexandre Rames 293674cd60a4SJon Cooper if (method == RESET_TYPE_MC_BIST) 293774cd60a4SJon Cooper efx_wait_for_bist_end(efx); 293874cd60a4SJon Cooper 2939626950dbSAlexandre Rames if ((method == RESET_TYPE_RECOVER_OR_DISABLE || 2940626950dbSAlexandre Rames method == RESET_TYPE_RECOVER_OR_ALL) && 2941626950dbSAlexandre Rames efx_try_recovery(efx)) 2942626950dbSAlexandre Rames return; 2943874aeea5SJeff Kirsher 2944874aeea5SJeff Kirsher if (!pending) 2945874aeea5SJeff Kirsher return; 2946874aeea5SJeff Kirsher 2947874aeea5SJeff Kirsher rtnl_lock(); 29487153f623SBen Hutchings 29497153f623SBen Hutchings /* We checked the state in efx_schedule_reset() but it may 29507153f623SBen Hutchings * have changed by now. Now that we have the RTNL lock, 29517153f623SBen Hutchings * it cannot change again. 29527153f623SBen Hutchings */ 29537153f623SBen Hutchings if (efx->state == STATE_READY) 2954626950dbSAlexandre Rames (void)efx_reset(efx, method); 29557153f623SBen Hutchings 2956874aeea5SJeff Kirsher rtnl_unlock(); 2957874aeea5SJeff Kirsher } 2958874aeea5SJeff Kirsher 2959874aeea5SJeff Kirsher void efx_schedule_reset(struct efx_nic *efx, enum reset_type type) 2960874aeea5SJeff Kirsher { 2961874aeea5SJeff Kirsher enum reset_type method; 2962874aeea5SJeff Kirsher 2963626950dbSAlexandre Rames if (efx->state == STATE_RECOVERY) { 2964626950dbSAlexandre Rames netif_dbg(efx, drv, efx->net_dev, 2965626950dbSAlexandre Rames "recovering: skip scheduling %s reset\n", 2966626950dbSAlexandre Rames RESET_TYPE(type)); 2967626950dbSAlexandre Rames return; 2968626950dbSAlexandre Rames } 2969626950dbSAlexandre Rames 2970874aeea5SJeff Kirsher switch (type) { 2971874aeea5SJeff Kirsher case RESET_TYPE_INVISIBLE: 2972874aeea5SJeff Kirsher case RESET_TYPE_ALL: 2973626950dbSAlexandre Rames case RESET_TYPE_RECOVER_OR_ALL: 2974874aeea5SJeff Kirsher case RESET_TYPE_WORLD: 2975874aeea5SJeff Kirsher case RESET_TYPE_DISABLE: 2976626950dbSAlexandre Rames case RESET_TYPE_RECOVER_OR_DISABLE: 2977087e9025SJon Cooper case RESET_TYPE_DATAPATH: 297874cd60a4SJon Cooper case RESET_TYPE_MC_BIST: 2979e283546cSEdward Cree case RESET_TYPE_MCDI_TIMEOUT: 2980874aeea5SJeff Kirsher method = type; 2981874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "scheduling %s reset\n", 2982874aeea5SJeff Kirsher RESET_TYPE(method)); 2983874aeea5SJeff Kirsher break; 2984874aeea5SJeff Kirsher default: 2985874aeea5SJeff Kirsher method = efx->type->map_reset_reason(type); 2986874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, 2987874aeea5SJeff Kirsher "scheduling %s reset for %s\n", 2988874aeea5SJeff Kirsher RESET_TYPE(method), RESET_TYPE(type)); 2989874aeea5SJeff Kirsher break; 2990874aeea5SJeff Kirsher } 2991874aeea5SJeff Kirsher 2992874aeea5SJeff Kirsher set_bit(method, &efx->reset_pending); 29937153f623SBen Hutchings smp_mb(); /* ensure we change reset_pending before checking state */ 29947153f623SBen Hutchings 29957153f623SBen Hutchings /* If we're not READY then just leave the flags set as the cue 29967153f623SBen Hutchings * to abort probing or reschedule the reset later. 29977153f623SBen Hutchings */ 29986aa7de05SMark Rutland if (READ_ONCE(efx->state) != STATE_READY) 29997153f623SBen Hutchings return; 3000874aeea5SJeff Kirsher 3001874aeea5SJeff Kirsher /* efx_process_channel() will no longer read events once a 3002874aeea5SJeff Kirsher * reset is scheduled. So switch back to poll'd MCDI completions. */ 3003874aeea5SJeff Kirsher efx_mcdi_mode_poll(efx); 3004874aeea5SJeff Kirsher 3005874aeea5SJeff Kirsher queue_work(reset_workqueue, &efx->reset_work); 3006874aeea5SJeff Kirsher } 3007874aeea5SJeff Kirsher 3008874aeea5SJeff Kirsher /************************************************************************** 3009874aeea5SJeff Kirsher * 3010874aeea5SJeff Kirsher * List of NICs we support 3011874aeea5SJeff Kirsher * 3012874aeea5SJeff Kirsher **************************************************************************/ 3013874aeea5SJeff Kirsher 3014874aeea5SJeff Kirsher /* PCI device ID table */ 30159baa3c34SBenoit Taine static const struct pci_device_id efx_pci_table[] = { 3016547c474fSBen Hutchings {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0803), /* SFC9020 */ 3017874aeea5SJeff Kirsher .driver_data = (unsigned long) &siena_a0_nic_type}, 3018547c474fSBen Hutchings {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0813), /* SFL9021 */ 3019874aeea5SJeff Kirsher .driver_data = (unsigned long) &siena_a0_nic_type}, 30208127d661SBen Hutchings {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0903), /* SFC9120 PF */ 30218127d661SBen Hutchings .driver_data = (unsigned long) &efx_hunt_a0_nic_type}, 30226f7f8aa6SShradha Shah {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x1903), /* SFC9120 VF */ 30236f7f8aa6SShradha Shah .driver_data = (unsigned long) &efx_hunt_a0_vf_nic_type}, 30243b06a00eSMateusz Wrzesinski {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0923), /* SFC9140 PF */ 30253b06a00eSMateusz Wrzesinski .driver_data = (unsigned long) &efx_hunt_a0_nic_type}, 3026dd248f1bSBert Kenward {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x1923), /* SFC9140 VF */ 3027dd248f1bSBert Kenward .driver_data = (unsigned long) &efx_hunt_a0_vf_nic_type}, 3028dd248f1bSBert Kenward {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0a03), /* SFC9220 PF */ 3029dd248f1bSBert Kenward .driver_data = (unsigned long) &efx_hunt_a0_nic_type}, 3030dd248f1bSBert Kenward {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x1a03), /* SFC9220 VF */ 3031dd248f1bSBert Kenward .driver_data = (unsigned long) &efx_hunt_a0_vf_nic_type}, 3032aae5a316SEdward Cree {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0b03), /* SFC9250 PF */ 3033aae5a316SEdward Cree .driver_data = (unsigned long) &efx_hunt_a0_nic_type}, 3034aae5a316SEdward Cree {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x1b03), /* SFC9250 VF */ 3035aae5a316SEdward Cree .driver_data = (unsigned long) &efx_hunt_a0_vf_nic_type}, 3036874aeea5SJeff Kirsher {0} /* end of list */ 3037874aeea5SJeff Kirsher }; 3038874aeea5SJeff Kirsher 3039874aeea5SJeff Kirsher /************************************************************************** 3040874aeea5SJeff Kirsher * 3041874aeea5SJeff Kirsher * Dummy PHY/MAC operations 3042874aeea5SJeff Kirsher * 3043874aeea5SJeff Kirsher * Can be used for some unimplemented operations 3044874aeea5SJeff Kirsher * Needed so all function pointers are valid and do not have to be tested 3045874aeea5SJeff Kirsher * before use 3046874aeea5SJeff Kirsher * 3047874aeea5SJeff Kirsher **************************************************************************/ 3048874aeea5SJeff Kirsher int efx_port_dummy_op_int(struct efx_nic *efx) 3049874aeea5SJeff Kirsher { 3050874aeea5SJeff Kirsher return 0; 3051874aeea5SJeff Kirsher } 3052874aeea5SJeff Kirsher void efx_port_dummy_op_void(struct efx_nic *efx) {} 3053874aeea5SJeff Kirsher 3054874aeea5SJeff Kirsher static bool efx_port_dummy_op_poll(struct efx_nic *efx) 3055874aeea5SJeff Kirsher { 3056874aeea5SJeff Kirsher return false; 3057874aeea5SJeff Kirsher } 3058874aeea5SJeff Kirsher 3059874aeea5SJeff Kirsher static const struct efx_phy_operations efx_dummy_phy_operations = { 3060874aeea5SJeff Kirsher .init = efx_port_dummy_op_int, 3061874aeea5SJeff Kirsher .reconfigure = efx_port_dummy_op_int, 3062874aeea5SJeff Kirsher .poll = efx_port_dummy_op_poll, 3063874aeea5SJeff Kirsher .fini = efx_port_dummy_op_void, 3064874aeea5SJeff Kirsher }; 3065874aeea5SJeff Kirsher 3066874aeea5SJeff Kirsher /************************************************************************** 3067874aeea5SJeff Kirsher * 3068874aeea5SJeff Kirsher * Data housekeeping 3069874aeea5SJeff Kirsher * 3070874aeea5SJeff Kirsher **************************************************************************/ 3071874aeea5SJeff Kirsher 3072874aeea5SJeff Kirsher /* This zeroes out and then fills in the invariants in a struct 3073874aeea5SJeff Kirsher * efx_nic (including all sub-structures). 3074874aeea5SJeff Kirsher */ 3075adeb15aaSBen Hutchings static int efx_init_struct(struct efx_nic *efx, 3076874aeea5SJeff Kirsher struct pci_dev *pci_dev, struct net_device *net_dev) 3077874aeea5SJeff Kirsher { 30786f9f6ec2SAndrew Rybchenko int rc = -ENOMEM, i; 3079874aeea5SJeff Kirsher 3080874aeea5SJeff Kirsher /* Initialise common structures */ 30810bcf4a64SBen Hutchings INIT_LIST_HEAD(&efx->node); 30820bcf4a64SBen Hutchings INIT_LIST_HEAD(&efx->secondary_list); 3083874aeea5SJeff Kirsher spin_lock_init(&efx->biu_lock); 3084874aeea5SJeff Kirsher #ifdef CONFIG_SFC_MTD 3085874aeea5SJeff Kirsher INIT_LIST_HEAD(&efx->mtd_list); 3086874aeea5SJeff Kirsher #endif 3087874aeea5SJeff Kirsher INIT_WORK(&efx->reset_work, efx_reset_work); 3088874aeea5SJeff Kirsher INIT_DELAYED_WORK(&efx->monitor_work, efx_monitor); 3089dd40781eSBen Hutchings INIT_DELAYED_WORK(&efx->selftest_work, efx_selftest_async_work); 3090874aeea5SJeff Kirsher efx->pci_dev = pci_dev; 3091874aeea5SJeff Kirsher efx->msg_enable = debug; 3092f16aeea0SBen Hutchings efx->state = STATE_UNINIT; 3093874aeea5SJeff Kirsher strlcpy(efx->name, pci_name(pci_dev), sizeof(efx->name)); 3094874aeea5SJeff Kirsher 3095874aeea5SJeff Kirsher efx->net_dev = net_dev; 309643a3739dSJon Cooper efx->rx_prefix_size = efx->type->rx_prefix_size; 30972ec03014SAndrew Rybchenko efx->rx_ip_align = 30982ec03014SAndrew Rybchenko NET_IP_ALIGN ? (efx->rx_prefix_size + NET_IP_ALIGN) % 4 : 0; 309943a3739dSJon Cooper efx->rx_packet_hash_offset = 310043a3739dSJon Cooper efx->type->rx_hash_offset - efx->type->rx_prefix_size; 3101bd9a265dSJon Cooper efx->rx_packet_ts_offset = 3102bd9a265dSJon Cooper efx->type->rx_ts_offset - efx->type->rx_prefix_size; 310342356d9aSEdward Cree INIT_LIST_HEAD(&efx->rss_context.list); 3104e0a65e3cSEdward Cree mutex_init(&efx->rss_lock); 3105874aeea5SJeff Kirsher spin_lock_init(&efx->stats_lock); 310671827443SEdward Cree efx->vi_stride = EFX_DEFAULT_VI_STRIDE; 3107c1be4821SEdward Cree efx->num_mac_stats = MC_CMD_MAC_NSTATS; 3108c1be4821SEdward Cree BUILD_BUG_ON(MC_CMD_MAC_NSTATS - 1 != MC_CMD_MAC_GENERATION_END); 3109874aeea5SJeff Kirsher mutex_init(&efx->mac_lock); 31103af0f342SEdward Cree #ifdef CONFIG_RFS_ACCEL 31113af0f342SEdward Cree mutex_init(&efx->rps_mutex); 3112f8d62037SEdward Cree spin_lock_init(&efx->rps_hash_lock); 3113f8d62037SEdward Cree /* Failure to allocate is not fatal, but may degrade ARFS performance */ 3114f8d62037SEdward Cree efx->rps_hash_table = kcalloc(EFX_ARFS_HASH_TABLE_SIZE, 3115f8d62037SEdward Cree sizeof(*efx->rps_hash_table), GFP_KERNEL); 31163af0f342SEdward Cree #endif 3117874aeea5SJeff Kirsher efx->phy_op = &efx_dummy_phy_operations; 3118874aeea5SJeff Kirsher efx->mdio.dev = net_dev; 3119874aeea5SJeff Kirsher INIT_WORK(&efx->mac_work, efx_mac_work); 31209f2cb71cSBen Hutchings init_waitqueue_head(&efx->flush_wq); 3121874aeea5SJeff Kirsher 3122874aeea5SJeff Kirsher for (i = 0; i < EFX_MAX_CHANNELS; i++) { 3123874aeea5SJeff Kirsher efx->channel[i] = efx_alloc_channel(efx, i, NULL); 3124874aeea5SJeff Kirsher if (!efx->channel[i]) 3125874aeea5SJeff Kirsher goto fail; 3126d8291187SBen Hutchings efx->msi_context[i].efx = efx; 3127d8291187SBen Hutchings efx->msi_context[i].index = i; 3128874aeea5SJeff Kirsher } 3129874aeea5SJeff Kirsher 3130874aeea5SJeff Kirsher /* Higher numbered interrupt modes are less capable! */ 31316f9f6ec2SAndrew Rybchenko if (WARN_ON_ONCE(efx->type->max_interrupt_mode > 31326f9f6ec2SAndrew Rybchenko efx->type->min_interrupt_mode)) { 31336f9f6ec2SAndrew Rybchenko rc = -EIO; 31346f9f6ec2SAndrew Rybchenko goto fail; 31356f9f6ec2SAndrew Rybchenko } 3136874aeea5SJeff Kirsher efx->interrupt_mode = max(efx->type->max_interrupt_mode, 3137874aeea5SJeff Kirsher interrupt_mode); 31386f9f6ec2SAndrew Rybchenko efx->interrupt_mode = min(efx->type->min_interrupt_mode, 31396f9f6ec2SAndrew Rybchenko interrupt_mode); 3140874aeea5SJeff Kirsher 3141874aeea5SJeff Kirsher /* Would be good to use the net_dev name, but we're too early */ 3142874aeea5SJeff Kirsher snprintf(efx->workqueue_name, sizeof(efx->workqueue_name), "sfc%s", 3143874aeea5SJeff Kirsher pci_name(pci_dev)); 3144874aeea5SJeff Kirsher efx->workqueue = create_singlethread_workqueue(efx->workqueue_name); 3145874aeea5SJeff Kirsher if (!efx->workqueue) 3146874aeea5SJeff Kirsher goto fail; 3147874aeea5SJeff Kirsher 3148874aeea5SJeff Kirsher return 0; 3149874aeea5SJeff Kirsher 3150874aeea5SJeff Kirsher fail: 3151874aeea5SJeff Kirsher efx_fini_struct(efx); 31526f9f6ec2SAndrew Rybchenko return rc; 3153874aeea5SJeff Kirsher } 3154874aeea5SJeff Kirsher 3155874aeea5SJeff Kirsher static void efx_fini_struct(struct efx_nic *efx) 3156874aeea5SJeff Kirsher { 3157874aeea5SJeff Kirsher int i; 3158874aeea5SJeff Kirsher 3159f8d62037SEdward Cree #ifdef CONFIG_RFS_ACCEL 3160f8d62037SEdward Cree kfree(efx->rps_hash_table); 3161f8d62037SEdward Cree #endif 3162f8d62037SEdward Cree 3163874aeea5SJeff Kirsher for (i = 0; i < EFX_MAX_CHANNELS; i++) 3164874aeea5SJeff Kirsher kfree(efx->channel[i]); 3165874aeea5SJeff Kirsher 3166ef215e64SBen Hutchings kfree(efx->vpd_sn); 3167ef215e64SBen Hutchings 3168874aeea5SJeff Kirsher if (efx->workqueue) { 3169874aeea5SJeff Kirsher destroy_workqueue(efx->workqueue); 3170874aeea5SJeff Kirsher efx->workqueue = NULL; 3171874aeea5SJeff Kirsher } 3172874aeea5SJeff Kirsher } 3173874aeea5SJeff Kirsher 3174e4d112e4SEdward Cree void efx_update_sw_stats(struct efx_nic *efx, u64 *stats) 3175e4d112e4SEdward Cree { 3176e4d112e4SEdward Cree u64 n_rx_nodesc_trunc = 0; 3177e4d112e4SEdward Cree struct efx_channel *channel; 3178e4d112e4SEdward Cree 3179e4d112e4SEdward Cree efx_for_each_channel(channel, efx) 3180e4d112e4SEdward Cree n_rx_nodesc_trunc += channel->n_rx_nodesc_trunc; 3181e4d112e4SEdward Cree stats[GENERIC_STAT_rx_nodesc_trunc] = n_rx_nodesc_trunc; 3182e4d112e4SEdward Cree stats[GENERIC_STAT_rx_noskb_drops] = atomic_read(&efx->n_rx_noskb_drops); 3183e4d112e4SEdward Cree } 3184e4d112e4SEdward Cree 3185f8d62037SEdward Cree bool efx_filter_spec_equal(const struct efx_filter_spec *left, 3186f8d62037SEdward Cree const struct efx_filter_spec *right) 3187f8d62037SEdward Cree { 3188f8d62037SEdward Cree if ((left->match_flags ^ right->match_flags) | 3189f8d62037SEdward Cree ((left->flags ^ right->flags) & 3190f8d62037SEdward Cree (EFX_FILTER_FLAG_RX | EFX_FILTER_FLAG_TX))) 3191f8d62037SEdward Cree return false; 3192f8d62037SEdward Cree 3193f8d62037SEdward Cree return memcmp(&left->outer_vid, &right->outer_vid, 3194f8d62037SEdward Cree sizeof(struct efx_filter_spec) - 3195f8d62037SEdward Cree offsetof(struct efx_filter_spec, outer_vid)) == 0; 3196f8d62037SEdward Cree } 3197f8d62037SEdward Cree 3198f8d62037SEdward Cree u32 efx_filter_spec_hash(const struct efx_filter_spec *spec) 3199f8d62037SEdward Cree { 3200f8d62037SEdward Cree BUILD_BUG_ON(offsetof(struct efx_filter_spec, outer_vid) & 3); 3201f8d62037SEdward Cree return jhash2((const u32 *)&spec->outer_vid, 3202f8d62037SEdward Cree (sizeof(struct efx_filter_spec) - 3203f8d62037SEdward Cree offsetof(struct efx_filter_spec, outer_vid)) / 4, 3204f8d62037SEdward Cree 0); 3205f8d62037SEdward Cree } 3206f8d62037SEdward Cree 3207f8d62037SEdward Cree #ifdef CONFIG_RFS_ACCEL 3208f8d62037SEdward Cree bool efx_rps_check_rule(struct efx_arfs_rule *rule, unsigned int filter_idx, 3209f8d62037SEdward Cree bool *force) 3210f8d62037SEdward Cree { 3211f8d62037SEdward Cree if (rule->filter_id == EFX_ARFS_FILTER_ID_PENDING) { 3212f8d62037SEdward Cree /* ARFS is currently updating this entry, leave it */ 3213f8d62037SEdward Cree return false; 3214f8d62037SEdward Cree } 3215f8d62037SEdward Cree if (rule->filter_id == EFX_ARFS_FILTER_ID_ERROR) { 3216f8d62037SEdward Cree /* ARFS tried and failed to update this, so it's probably out 3217f8d62037SEdward Cree * of date. Remove the filter and the ARFS rule entry. 3218f8d62037SEdward Cree */ 3219f8d62037SEdward Cree rule->filter_id = EFX_ARFS_FILTER_ID_REMOVING; 3220f8d62037SEdward Cree *force = true; 3221f8d62037SEdward Cree return true; 3222f8d62037SEdward Cree } else if (WARN_ON(rule->filter_id != filter_idx)) { /* can't happen */ 3223f8d62037SEdward Cree /* ARFS has moved on, so old filter is not needed. Since we did 3224f8d62037SEdward Cree * not mark the rule with EFX_ARFS_FILTER_ID_REMOVING, it will 3225f8d62037SEdward Cree * not be removed by efx_rps_hash_del() subsequently. 3226f8d62037SEdward Cree */ 3227f8d62037SEdward Cree *force = true; 3228f8d62037SEdward Cree return true; 3229f8d62037SEdward Cree } 3230f8d62037SEdward Cree /* Remove it iff ARFS wants to. */ 3231f8d62037SEdward Cree return true; 3232f8d62037SEdward Cree } 3233f8d62037SEdward Cree 3234829eb053SColin Ian King static 3235f8d62037SEdward Cree struct hlist_head *efx_rps_hash_bucket(struct efx_nic *efx, 3236f8d62037SEdward Cree const struct efx_filter_spec *spec) 3237f8d62037SEdward Cree { 3238f8d62037SEdward Cree u32 hash = efx_filter_spec_hash(spec); 3239f8d62037SEdward Cree 3240013ff4a6SLance Roy lockdep_assert_held(&efx->rps_hash_lock); 3241f8d62037SEdward Cree if (!efx->rps_hash_table) 3242f8d62037SEdward Cree return NULL; 3243f8d62037SEdward Cree return &efx->rps_hash_table[hash % EFX_ARFS_HASH_TABLE_SIZE]; 3244f8d62037SEdward Cree } 3245f8d62037SEdward Cree 3246f8d62037SEdward Cree struct efx_arfs_rule *efx_rps_hash_find(struct efx_nic *efx, 3247f8d62037SEdward Cree const struct efx_filter_spec *spec) 3248f8d62037SEdward Cree { 3249f8d62037SEdward Cree struct efx_arfs_rule *rule; 3250f8d62037SEdward Cree struct hlist_head *head; 3251f8d62037SEdward Cree struct hlist_node *node; 3252f8d62037SEdward Cree 3253f8d62037SEdward Cree head = efx_rps_hash_bucket(efx, spec); 3254f8d62037SEdward Cree if (!head) 3255f8d62037SEdward Cree return NULL; 3256f8d62037SEdward Cree hlist_for_each(node, head) { 3257f8d62037SEdward Cree rule = container_of(node, struct efx_arfs_rule, node); 3258f8d62037SEdward Cree if (efx_filter_spec_equal(spec, &rule->spec)) 3259f8d62037SEdward Cree return rule; 3260f8d62037SEdward Cree } 3261f8d62037SEdward Cree return NULL; 3262f8d62037SEdward Cree } 3263f8d62037SEdward Cree 3264f8d62037SEdward Cree struct efx_arfs_rule *efx_rps_hash_add(struct efx_nic *efx, 3265f8d62037SEdward Cree const struct efx_filter_spec *spec, 3266f8d62037SEdward Cree bool *new) 3267f8d62037SEdward Cree { 3268f8d62037SEdward Cree struct efx_arfs_rule *rule; 3269f8d62037SEdward Cree struct hlist_head *head; 3270f8d62037SEdward Cree struct hlist_node *node; 3271f8d62037SEdward Cree 3272f8d62037SEdward Cree head = efx_rps_hash_bucket(efx, spec); 3273f8d62037SEdward Cree if (!head) 3274f8d62037SEdward Cree return NULL; 3275f8d62037SEdward Cree hlist_for_each(node, head) { 3276f8d62037SEdward Cree rule = container_of(node, struct efx_arfs_rule, node); 3277f8d62037SEdward Cree if (efx_filter_spec_equal(spec, &rule->spec)) { 3278f8d62037SEdward Cree *new = false; 3279f8d62037SEdward Cree return rule; 3280f8d62037SEdward Cree } 3281f8d62037SEdward Cree } 3282f8d62037SEdward Cree rule = kmalloc(sizeof(*rule), GFP_ATOMIC); 3283f8d62037SEdward Cree *new = true; 3284f8d62037SEdward Cree if (rule) { 3285f8d62037SEdward Cree memcpy(&rule->spec, spec, sizeof(rule->spec)); 3286f8d62037SEdward Cree hlist_add_head(&rule->node, head); 3287f8d62037SEdward Cree } 3288f8d62037SEdward Cree return rule; 3289f8d62037SEdward Cree } 3290f8d62037SEdward Cree 3291f8d62037SEdward Cree void efx_rps_hash_del(struct efx_nic *efx, const struct efx_filter_spec *spec) 3292f8d62037SEdward Cree { 3293f8d62037SEdward Cree struct efx_arfs_rule *rule; 3294f8d62037SEdward Cree struct hlist_head *head; 3295f8d62037SEdward Cree struct hlist_node *node; 3296f8d62037SEdward Cree 3297f8d62037SEdward Cree head = efx_rps_hash_bucket(efx, spec); 3298f8d62037SEdward Cree if (WARN_ON(!head)) 3299f8d62037SEdward Cree return; 3300f8d62037SEdward Cree hlist_for_each(node, head) { 3301f8d62037SEdward Cree rule = container_of(node, struct efx_arfs_rule, node); 3302f8d62037SEdward Cree if (efx_filter_spec_equal(spec, &rule->spec)) { 3303f8d62037SEdward Cree /* Someone already reused the entry. We know that if 3304f8d62037SEdward Cree * this check doesn't fire (i.e. filter_id == REMOVING) 3305f8d62037SEdward Cree * then the REMOVING mark was put there by our caller, 3306f8d62037SEdward Cree * because caller is holding a lock on filter table and 3307f8d62037SEdward Cree * only holders of that lock set REMOVING. 3308f8d62037SEdward Cree */ 3309f8d62037SEdward Cree if (rule->filter_id != EFX_ARFS_FILTER_ID_REMOVING) 3310f8d62037SEdward Cree return; 3311f8d62037SEdward Cree hlist_del(node); 3312f8d62037SEdward Cree kfree(rule); 3313f8d62037SEdward Cree return; 3314f8d62037SEdward Cree } 3315f8d62037SEdward Cree } 3316f8d62037SEdward Cree /* We didn't find it. */ 3317f8d62037SEdward Cree WARN_ON(1); 3318f8d62037SEdward Cree } 3319f8d62037SEdward Cree #endif 3320f8d62037SEdward Cree 332142356d9aSEdward Cree /* RSS contexts. We're using linked lists and crappy O(n) algorithms, because 332242356d9aSEdward Cree * (a) this is an infrequent control-plane operation and (b) n is small (max 64) 332342356d9aSEdward Cree */ 3324e0a65e3cSEdward Cree struct efx_rss_context *efx_alloc_rss_context_entry(struct efx_nic *efx) 332542356d9aSEdward Cree { 3326e0a65e3cSEdward Cree struct list_head *head = &efx->rss_context.list; 332742356d9aSEdward Cree struct efx_rss_context *ctx, *new; 332842356d9aSEdward Cree u32 id = 1; /* Don't use zero, that refers to the master RSS context */ 332942356d9aSEdward Cree 3330e0a65e3cSEdward Cree WARN_ON(!mutex_is_locked(&efx->rss_lock)); 3331e0a65e3cSEdward Cree 333242356d9aSEdward Cree /* Search for first gap in the numbering */ 333342356d9aSEdward Cree list_for_each_entry(ctx, head, list) { 333442356d9aSEdward Cree if (ctx->user_id != id) 333542356d9aSEdward Cree break; 333642356d9aSEdward Cree id++; 333742356d9aSEdward Cree /* Check for wrap. If this happens, we have nearly 2^32 333842356d9aSEdward Cree * allocated RSS contexts, which seems unlikely. 333942356d9aSEdward Cree */ 334042356d9aSEdward Cree if (WARN_ON_ONCE(!id)) 334142356d9aSEdward Cree return NULL; 334242356d9aSEdward Cree } 334342356d9aSEdward Cree 334442356d9aSEdward Cree /* Create the new entry */ 334542356d9aSEdward Cree new = kmalloc(sizeof(struct efx_rss_context), GFP_KERNEL); 334642356d9aSEdward Cree if (!new) 334742356d9aSEdward Cree return NULL; 334842356d9aSEdward Cree new->context_id = EFX_EF10_RSS_CONTEXT_INVALID; 334942356d9aSEdward Cree new->rx_hash_udp_4tuple = false; 335042356d9aSEdward Cree 335142356d9aSEdward Cree /* Insert the new entry into the gap */ 335242356d9aSEdward Cree new->user_id = id; 335342356d9aSEdward Cree list_add_tail(&new->list, &ctx->list); 335442356d9aSEdward Cree return new; 335542356d9aSEdward Cree } 335642356d9aSEdward Cree 3357e0a65e3cSEdward Cree struct efx_rss_context *efx_find_rss_context_entry(struct efx_nic *efx, u32 id) 335842356d9aSEdward Cree { 3359e0a65e3cSEdward Cree struct list_head *head = &efx->rss_context.list; 336042356d9aSEdward Cree struct efx_rss_context *ctx; 336142356d9aSEdward Cree 3362e0a65e3cSEdward Cree WARN_ON(!mutex_is_locked(&efx->rss_lock)); 3363e0a65e3cSEdward Cree 336442356d9aSEdward Cree list_for_each_entry(ctx, head, list) 336542356d9aSEdward Cree if (ctx->user_id == id) 336642356d9aSEdward Cree return ctx; 336742356d9aSEdward Cree return NULL; 336842356d9aSEdward Cree } 336942356d9aSEdward Cree 337042356d9aSEdward Cree void efx_free_rss_context_entry(struct efx_rss_context *ctx) 337142356d9aSEdward Cree { 337242356d9aSEdward Cree list_del(&ctx->list); 337342356d9aSEdward Cree kfree(ctx); 337442356d9aSEdward Cree } 337542356d9aSEdward Cree 3376874aeea5SJeff Kirsher /************************************************************************** 3377874aeea5SJeff Kirsher * 3378874aeea5SJeff Kirsher * PCI interface 3379874aeea5SJeff Kirsher * 3380874aeea5SJeff Kirsher **************************************************************************/ 3381874aeea5SJeff Kirsher 3382874aeea5SJeff Kirsher /* Main body of final NIC shutdown code 3383874aeea5SJeff Kirsher * This is called only at module unload (or hotplug removal). 3384874aeea5SJeff Kirsher */ 3385874aeea5SJeff Kirsher static void efx_pci_remove_main(struct efx_nic *efx) 3386874aeea5SJeff Kirsher { 33877153f623SBen Hutchings /* Flush reset_work. It can no longer be scheduled since we 33887153f623SBen Hutchings * are not READY. 33897153f623SBen Hutchings */ 33907153f623SBen Hutchings BUG_ON(efx->state == STATE_READY); 33917153f623SBen Hutchings cancel_work_sync(&efx->reset_work); 33927153f623SBen Hutchings 3393d8291187SBen Hutchings efx_disable_interrupts(efx); 3394a83762d9SBert Kenward efx_clear_interrupt_affinity(efx); 3395874aeea5SJeff Kirsher efx_nic_fini_interrupt(efx); 3396874aeea5SJeff Kirsher efx_fini_port(efx); 3397874aeea5SJeff Kirsher efx->type->fini(efx); 3398874aeea5SJeff Kirsher efx_fini_napi(efx); 3399874aeea5SJeff Kirsher efx_remove_all(efx); 3400874aeea5SJeff Kirsher } 3401874aeea5SJeff Kirsher 3402874aeea5SJeff Kirsher /* Final NIC shutdown 34032a3fc311SDaniel Pieczko * This is called only at module unload (or hotplug removal). A PF can call 34042a3fc311SDaniel Pieczko * this on its VFs to ensure they are unbound first. 3405874aeea5SJeff Kirsher */ 3406874aeea5SJeff Kirsher static void efx_pci_remove(struct pci_dev *pci_dev) 3407874aeea5SJeff Kirsher { 3408874aeea5SJeff Kirsher struct efx_nic *efx; 3409874aeea5SJeff Kirsher 3410874aeea5SJeff Kirsher efx = pci_get_drvdata(pci_dev); 3411874aeea5SJeff Kirsher if (!efx) 3412874aeea5SJeff Kirsher return; 3413874aeea5SJeff Kirsher 3414874aeea5SJeff Kirsher /* Mark the NIC as fini, then stop the interface */ 3415874aeea5SJeff Kirsher rtnl_lock(); 34160bcf4a64SBen Hutchings efx_dissociate(efx); 3417874aeea5SJeff Kirsher dev_close(efx->net_dev); 3418d8291187SBen Hutchings efx_disable_interrupts(efx); 3419ea6bb99eSEdward Cree efx->state = STATE_UNINIT; 3420874aeea5SJeff Kirsher rtnl_unlock(); 3421874aeea5SJeff Kirsher 34227fa8d547SShradha Shah if (efx->type->sriov_fini) 3423d98a4ffeSShradha Shah efx->type->sriov_fini(efx); 34247fa8d547SShradha Shah 3425874aeea5SJeff Kirsher efx_unregister_netdev(efx); 3426874aeea5SJeff Kirsher 3427874aeea5SJeff Kirsher efx_mtd_remove(efx); 3428874aeea5SJeff Kirsher 3429874aeea5SJeff Kirsher efx_pci_remove_main(efx); 3430874aeea5SJeff Kirsher 3431874aeea5SJeff Kirsher efx_fini_io(efx); 3432874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "shutdown successful\n"); 3433874aeea5SJeff Kirsher 3434874aeea5SJeff Kirsher efx_fini_struct(efx); 3435874aeea5SJeff Kirsher free_netdev(efx->net_dev); 3436626950dbSAlexandre Rames 3437626950dbSAlexandre Rames pci_disable_pcie_error_reporting(pci_dev); 3438874aeea5SJeff Kirsher }; 3439874aeea5SJeff Kirsher 3440460eeaa0SBen Hutchings /* NIC VPD information 3441460eeaa0SBen Hutchings * Called during probe to display the part number of the 3442460eeaa0SBen Hutchings * installed NIC. VPD is potentially very large but this should 3443460eeaa0SBen Hutchings * always appear within the first 512 bytes. 3444460eeaa0SBen Hutchings */ 3445460eeaa0SBen Hutchings #define SFC_VPD_LEN 512 3446ef215e64SBen Hutchings static void efx_probe_vpd_strings(struct efx_nic *efx) 3447460eeaa0SBen Hutchings { 3448460eeaa0SBen Hutchings struct pci_dev *dev = efx->pci_dev; 3449460eeaa0SBen Hutchings char vpd_data[SFC_VPD_LEN]; 3450460eeaa0SBen Hutchings ssize_t vpd_size; 3451ef215e64SBen Hutchings int ro_start, ro_size, i, j; 3452460eeaa0SBen Hutchings 3453460eeaa0SBen Hutchings /* Get the vpd data from the device */ 3454460eeaa0SBen Hutchings vpd_size = pci_read_vpd(dev, 0, sizeof(vpd_data), vpd_data); 3455460eeaa0SBen Hutchings if (vpd_size <= 0) { 3456460eeaa0SBen Hutchings netif_err(efx, drv, efx->net_dev, "Unable to read VPD\n"); 3457460eeaa0SBen Hutchings return; 3458460eeaa0SBen Hutchings } 3459460eeaa0SBen Hutchings 3460460eeaa0SBen Hutchings /* Get the Read only section */ 3461ef215e64SBen Hutchings ro_start = pci_vpd_find_tag(vpd_data, 0, vpd_size, PCI_VPD_LRDT_RO_DATA); 3462ef215e64SBen Hutchings if (ro_start < 0) { 3463460eeaa0SBen Hutchings netif_err(efx, drv, efx->net_dev, "VPD Read-only not found\n"); 3464460eeaa0SBen Hutchings return; 3465460eeaa0SBen Hutchings } 3466460eeaa0SBen Hutchings 3467ef215e64SBen Hutchings ro_size = pci_vpd_lrdt_size(&vpd_data[ro_start]); 3468ef215e64SBen Hutchings j = ro_size; 3469ef215e64SBen Hutchings i = ro_start + PCI_VPD_LRDT_TAG_SIZE; 3470460eeaa0SBen Hutchings if (i + j > vpd_size) 3471460eeaa0SBen Hutchings j = vpd_size - i; 3472460eeaa0SBen Hutchings 3473460eeaa0SBen Hutchings /* Get the Part number */ 3474460eeaa0SBen Hutchings i = pci_vpd_find_info_keyword(vpd_data, i, j, "PN"); 3475460eeaa0SBen Hutchings if (i < 0) { 3476460eeaa0SBen Hutchings netif_err(efx, drv, efx->net_dev, "Part number not found\n"); 3477460eeaa0SBen Hutchings return; 3478460eeaa0SBen Hutchings } 3479460eeaa0SBen Hutchings 3480460eeaa0SBen Hutchings j = pci_vpd_info_field_size(&vpd_data[i]); 3481460eeaa0SBen Hutchings i += PCI_VPD_INFO_FLD_HDR_SIZE; 3482460eeaa0SBen Hutchings if (i + j > vpd_size) { 3483460eeaa0SBen Hutchings netif_err(efx, drv, efx->net_dev, "Incomplete part number\n"); 3484460eeaa0SBen Hutchings return; 3485460eeaa0SBen Hutchings } 3486460eeaa0SBen Hutchings 3487460eeaa0SBen Hutchings netif_info(efx, drv, efx->net_dev, 3488460eeaa0SBen Hutchings "Part Number : %.*s\n", j, &vpd_data[i]); 3489ef215e64SBen Hutchings 3490ef215e64SBen Hutchings i = ro_start + PCI_VPD_LRDT_TAG_SIZE; 3491ef215e64SBen Hutchings j = ro_size; 3492ef215e64SBen Hutchings i = pci_vpd_find_info_keyword(vpd_data, i, j, "SN"); 3493ef215e64SBen Hutchings if (i < 0) { 3494ef215e64SBen Hutchings netif_err(efx, drv, efx->net_dev, "Serial number not found\n"); 3495ef215e64SBen Hutchings return; 3496ef215e64SBen Hutchings } 3497ef215e64SBen Hutchings 3498ef215e64SBen Hutchings j = pci_vpd_info_field_size(&vpd_data[i]); 3499ef215e64SBen Hutchings i += PCI_VPD_INFO_FLD_HDR_SIZE; 3500ef215e64SBen Hutchings if (i + j > vpd_size) { 3501ef215e64SBen Hutchings netif_err(efx, drv, efx->net_dev, "Incomplete serial number\n"); 3502ef215e64SBen Hutchings return; 3503ef215e64SBen Hutchings } 3504ef215e64SBen Hutchings 3505ef215e64SBen Hutchings efx->vpd_sn = kmalloc(j + 1, GFP_KERNEL); 3506ef215e64SBen Hutchings if (!efx->vpd_sn) 3507ef215e64SBen Hutchings return; 3508ef215e64SBen Hutchings 3509ef215e64SBen Hutchings snprintf(efx->vpd_sn, j + 1, "%s", &vpd_data[i]); 3510460eeaa0SBen Hutchings } 3511460eeaa0SBen Hutchings 3512460eeaa0SBen Hutchings 3513874aeea5SJeff Kirsher /* Main body of NIC initialisation 3514874aeea5SJeff Kirsher * This is called at module load (or hotplug insertion, theoretically). 3515874aeea5SJeff Kirsher */ 3516874aeea5SJeff Kirsher static int efx_pci_probe_main(struct efx_nic *efx) 3517874aeea5SJeff Kirsher { 3518874aeea5SJeff Kirsher int rc; 3519874aeea5SJeff Kirsher 3520874aeea5SJeff Kirsher /* Do start-of-day initialisation */ 3521874aeea5SJeff Kirsher rc = efx_probe_all(efx); 3522874aeea5SJeff Kirsher if (rc) 3523874aeea5SJeff Kirsher goto fail1; 3524874aeea5SJeff Kirsher 3525874aeea5SJeff Kirsher efx_init_napi(efx); 3526874aeea5SJeff Kirsher 3527193f2003SBert Kenward down_write(&efx->filter_sem); 3528874aeea5SJeff Kirsher rc = efx->type->init(efx); 3529193f2003SBert Kenward up_write(&efx->filter_sem); 3530874aeea5SJeff Kirsher if (rc) { 3531874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 3532874aeea5SJeff Kirsher "failed to initialise NIC\n"); 3533874aeea5SJeff Kirsher goto fail3; 3534874aeea5SJeff Kirsher } 3535874aeea5SJeff Kirsher 3536874aeea5SJeff Kirsher rc = efx_init_port(efx); 3537874aeea5SJeff Kirsher if (rc) { 3538874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 3539874aeea5SJeff Kirsher "failed to initialise port\n"); 3540874aeea5SJeff Kirsher goto fail4; 3541874aeea5SJeff Kirsher } 3542874aeea5SJeff Kirsher 3543874aeea5SJeff Kirsher rc = efx_nic_init_interrupt(efx); 3544874aeea5SJeff Kirsher if (rc) 3545874aeea5SJeff Kirsher goto fail5; 3546a83762d9SBert Kenward 3547a83762d9SBert Kenward efx_set_interrupt_affinity(efx); 3548261e4d96SJon Cooper rc = efx_enable_interrupts(efx); 3549261e4d96SJon Cooper if (rc) 3550261e4d96SJon Cooper goto fail6; 3551874aeea5SJeff Kirsher 3552874aeea5SJeff Kirsher return 0; 3553874aeea5SJeff Kirsher 3554261e4d96SJon Cooper fail6: 3555a83762d9SBert Kenward efx_clear_interrupt_affinity(efx); 3556261e4d96SJon Cooper efx_nic_fini_interrupt(efx); 3557874aeea5SJeff Kirsher fail5: 3558874aeea5SJeff Kirsher efx_fini_port(efx); 3559874aeea5SJeff Kirsher fail4: 3560874aeea5SJeff Kirsher efx->type->fini(efx); 3561874aeea5SJeff Kirsher fail3: 3562874aeea5SJeff Kirsher efx_fini_napi(efx); 3563874aeea5SJeff Kirsher efx_remove_all(efx); 3564874aeea5SJeff Kirsher fail1: 3565874aeea5SJeff Kirsher return rc; 3566874aeea5SJeff Kirsher } 3567874aeea5SJeff Kirsher 35688a531400SJon Cooper static int efx_pci_probe_post_io(struct efx_nic *efx) 35698a531400SJon Cooper { 35708a531400SJon Cooper struct net_device *net_dev = efx->net_dev; 35718a531400SJon Cooper int rc = efx_pci_probe_main(efx); 35728a531400SJon Cooper 35738a531400SJon Cooper if (rc) 35748a531400SJon Cooper return rc; 35758a531400SJon Cooper 35768a531400SJon Cooper if (efx->type->sriov_init) { 35778a531400SJon Cooper rc = efx->type->sriov_init(efx); 35788a531400SJon Cooper if (rc) 35798a531400SJon Cooper netif_err(efx, probe, efx->net_dev, 35808a531400SJon Cooper "SR-IOV can't be enabled rc %d\n", rc); 35818a531400SJon Cooper } 35828a531400SJon Cooper 35838a531400SJon Cooper /* Determine netdevice features */ 35848a531400SJon Cooper net_dev->features |= (efx->type->offload_features | NETIF_F_SG | 35856978729fSEdward Cree NETIF_F_TSO | NETIF_F_RXCSUM | NETIF_F_RXALL); 35868a531400SJon Cooper if (efx->type->offload_features & (NETIF_F_IPV6_CSUM | NETIF_F_HW_CSUM)) 35878a531400SJon Cooper net_dev->features |= NETIF_F_TSO6; 35888a531400SJon Cooper /* Check whether device supports TSO */ 35898a531400SJon Cooper if (!efx->type->tso_versions || !efx->type->tso_versions(efx)) 35908a531400SJon Cooper net_dev->features &= ~NETIF_F_ALL_TSO; 35918a531400SJon Cooper /* Mask for features that also apply to VLAN devices */ 35928a531400SJon Cooper net_dev->vlan_features |= (NETIF_F_HW_CSUM | NETIF_F_SG | 35938a531400SJon Cooper NETIF_F_HIGHDMA | NETIF_F_ALL_TSO | 35948a531400SJon Cooper NETIF_F_RXCSUM); 35958a531400SJon Cooper 35966978729fSEdward Cree net_dev->hw_features |= net_dev->features & ~efx->fixed_features; 35976978729fSEdward Cree 35986978729fSEdward Cree /* Disable receiving frames with bad FCS, by default. */ 35996978729fSEdward Cree net_dev->features &= ~NETIF_F_RXALL; 36008a531400SJon Cooper 36018a531400SJon Cooper /* Disable VLAN filtering by default. It may be enforced if 36028a531400SJon Cooper * the feature is fixed (i.e. VLAN filters are required to 36038a531400SJon Cooper * receive VLAN tagged packets due to vPort restrictions). 36048a531400SJon Cooper */ 36058a531400SJon Cooper net_dev->features &= ~NETIF_F_HW_VLAN_CTAG_FILTER; 36068a531400SJon Cooper net_dev->features |= efx->fixed_features; 36078a531400SJon Cooper 36088a531400SJon Cooper rc = efx_register_netdev(efx); 36098a531400SJon Cooper if (!rc) 36108a531400SJon Cooper return 0; 36118a531400SJon Cooper 36128a531400SJon Cooper efx_pci_remove_main(efx); 36138a531400SJon Cooper return rc; 36148a531400SJon Cooper } 36158a531400SJon Cooper 3616874aeea5SJeff Kirsher /* NIC initialisation 3617874aeea5SJeff Kirsher * 3618874aeea5SJeff Kirsher * This is called at module load (or hotplug insertion, 361973ba7b68SBen Hutchings * theoretically). It sets up PCI mappings, resets the NIC, 3620874aeea5SJeff Kirsher * sets up and registers the network devices with the kernel and hooks 3621874aeea5SJeff Kirsher * the interrupt service routine. It does not prepare the device for 3622874aeea5SJeff Kirsher * transmission; this is left to the first time one of the network 3623874aeea5SJeff Kirsher * interfaces is brought up (i.e. efx_net_open). 3624874aeea5SJeff Kirsher */ 362587d1fc11SBill Pemberton static int efx_pci_probe(struct pci_dev *pci_dev, 3626874aeea5SJeff Kirsher const struct pci_device_id *entry) 3627874aeea5SJeff Kirsher { 3628874aeea5SJeff Kirsher struct net_device *net_dev; 3629874aeea5SJeff Kirsher struct efx_nic *efx; 3630fadac6aaSBen Hutchings int rc; 3631874aeea5SJeff Kirsher 3632874aeea5SJeff Kirsher /* Allocate and initialise a struct net_device and struct efx_nic */ 3633874aeea5SJeff Kirsher net_dev = alloc_etherdev_mqs(sizeof(*efx), EFX_MAX_CORE_TX_QUEUES, 3634874aeea5SJeff Kirsher EFX_MAX_RX_QUEUES); 3635874aeea5SJeff Kirsher if (!net_dev) 3636874aeea5SJeff Kirsher return -ENOMEM; 3637adeb15aaSBen Hutchings efx = netdev_priv(net_dev); 3638adeb15aaSBen Hutchings efx->type = (const struct efx_nic_type *) entry->driver_data; 3639ebfcd0fdSAndrew Rybchenko efx->fixed_features |= NETIF_F_HIGHDMA; 3640eb7cfd8cSAndrew Rybchenko 3641874aeea5SJeff Kirsher pci_set_drvdata(pci_dev, efx); 3642874aeea5SJeff Kirsher SET_NETDEV_DEV(net_dev, &pci_dev->dev); 3643adeb15aaSBen Hutchings rc = efx_init_struct(efx, pci_dev, net_dev); 3644874aeea5SJeff Kirsher if (rc) 3645874aeea5SJeff Kirsher goto fail1; 3646874aeea5SJeff Kirsher 3647874aeea5SJeff Kirsher netif_info(efx, probe, efx->net_dev, 3648874aeea5SJeff Kirsher "Solarflare NIC detected\n"); 3649874aeea5SJeff Kirsher 36506f7f8aa6SShradha Shah if (!efx->type->is_vf) 3651ef215e64SBen Hutchings efx_probe_vpd_strings(efx); 3652460eeaa0SBen Hutchings 3653874aeea5SJeff Kirsher /* Set up basic I/O (BAR mappings etc) */ 3654874aeea5SJeff Kirsher rc = efx_init_io(efx); 3655874aeea5SJeff Kirsher if (rc) 3656874aeea5SJeff Kirsher goto fail2; 3657874aeea5SJeff Kirsher 36588a531400SJon Cooper rc = efx_pci_probe_post_io(efx); 36598a531400SJon Cooper if (rc) { 36608a531400SJon Cooper /* On failure, retry once immediately. 36618a531400SJon Cooper * If we aborted probe due to a scheduled reset, dismiss it. 36628a531400SJon Cooper */ 36638a531400SJon Cooper efx->reset_pending = 0; 36648a531400SJon Cooper rc = efx_pci_probe_post_io(efx); 36658a531400SJon Cooper if (rc) { 36668a531400SJon Cooper /* On another failure, retry once more 36678a531400SJon Cooper * after a 50-305ms delay. 36688a531400SJon Cooper */ 36698a531400SJon Cooper unsigned char r; 36708a531400SJon Cooper 36718a531400SJon Cooper get_random_bytes(&r, 1); 36728a531400SJon Cooper msleep((unsigned int)r + 50); 36738a531400SJon Cooper efx->reset_pending = 0; 36748a531400SJon Cooper rc = efx_pci_probe_post_io(efx); 36758a531400SJon Cooper } 36768a531400SJon Cooper } 3677fadac6aaSBen Hutchings if (rc) 3678874aeea5SJeff Kirsher goto fail3; 3679874aeea5SJeff Kirsher 3680874aeea5SJeff Kirsher netif_dbg(efx, probe, efx->net_dev, "initialisation successful\n"); 3681874aeea5SJeff Kirsher 36827c43161cSBen Hutchings /* Try to create MTDs, but allow this to fail */ 3683874aeea5SJeff Kirsher rtnl_lock(); 36847c43161cSBen Hutchings rc = efx_mtd_probe(efx); 3685874aeea5SJeff Kirsher rtnl_unlock(); 368609a04204SBert Kenward if (rc && rc != -EPERM) 36877c43161cSBen Hutchings netif_warn(efx, probe, efx->net_dev, 36887c43161cSBen Hutchings "failed to create MTDs (%d)\n", rc); 36897c43161cSBen Hutchings 369005cfee98SMartin Habets (void)pci_enable_pcie_error_reporting(pci_dev); 3691626950dbSAlexandre Rames 3692e5fbd977SJon Cooper if (efx->type->udp_tnl_push_ports) 3693e5fbd977SJon Cooper efx->type->udp_tnl_push_ports(efx); 3694e5fbd977SJon Cooper 3695874aeea5SJeff Kirsher return 0; 3696874aeea5SJeff Kirsher 3697874aeea5SJeff Kirsher fail3: 3698874aeea5SJeff Kirsher efx_fini_io(efx); 3699874aeea5SJeff Kirsher fail2: 3700874aeea5SJeff Kirsher efx_fini_struct(efx); 3701874aeea5SJeff Kirsher fail1: 3702874aeea5SJeff Kirsher WARN_ON(rc > 0); 3703874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "initialisation failed. rc=%d\n", rc); 3704874aeea5SJeff Kirsher free_netdev(net_dev); 3705874aeea5SJeff Kirsher return rc; 3706874aeea5SJeff Kirsher } 3707874aeea5SJeff Kirsher 3708834e23ddSShradha Shah /* efx_pci_sriov_configure returns the actual number of Virtual Functions 3709834e23ddSShradha Shah * enabled on success 3710834e23ddSShradha Shah */ 3711834e23ddSShradha Shah #ifdef CONFIG_SFC_SRIOV 3712834e23ddSShradha Shah static int efx_pci_sriov_configure(struct pci_dev *dev, int num_vfs) 3713834e23ddSShradha Shah { 3714834e23ddSShradha Shah int rc; 3715834e23ddSShradha Shah struct efx_nic *efx = pci_get_drvdata(dev); 3716834e23ddSShradha Shah 3717834e23ddSShradha Shah if (efx->type->sriov_configure) { 3718834e23ddSShradha Shah rc = efx->type->sriov_configure(efx, num_vfs); 3719834e23ddSShradha Shah if (rc) 3720834e23ddSShradha Shah return rc; 3721834e23ddSShradha Shah else 3722834e23ddSShradha Shah return num_vfs; 3723834e23ddSShradha Shah } else 3724834e23ddSShradha Shah return -EOPNOTSUPP; 3725834e23ddSShradha Shah } 3726834e23ddSShradha Shah #endif 3727834e23ddSShradha Shah 3728874aeea5SJeff Kirsher static int efx_pm_freeze(struct device *dev) 3729874aeea5SJeff Kirsher { 37303e03a8baSChuhong Yuan struct efx_nic *efx = dev_get_drvdata(dev); 3731874aeea5SJeff Kirsher 373261da026dSBen Hutchings rtnl_lock(); 373361da026dSBen Hutchings 37346032fb56SBen Hutchings if (efx->state != STATE_DISABLED) { 3735f16aeea0SBen Hutchings efx->state = STATE_UNINIT; 3736874aeea5SJeff Kirsher 3737c2f3b8e3SDaniel Pieczko efx_device_detach_sync(efx); 3738874aeea5SJeff Kirsher 3739874aeea5SJeff Kirsher efx_stop_all(efx); 3740d8291187SBen Hutchings efx_disable_interrupts(efx); 37416032fb56SBen Hutchings } 3742874aeea5SJeff Kirsher 374361da026dSBen Hutchings rtnl_unlock(); 374461da026dSBen Hutchings 3745874aeea5SJeff Kirsher return 0; 3746874aeea5SJeff Kirsher } 3747874aeea5SJeff Kirsher 3748874aeea5SJeff Kirsher static int efx_pm_thaw(struct device *dev) 3749874aeea5SJeff Kirsher { 3750261e4d96SJon Cooper int rc; 37513e03a8baSChuhong Yuan struct efx_nic *efx = dev_get_drvdata(dev); 3752874aeea5SJeff Kirsher 375361da026dSBen Hutchings rtnl_lock(); 375461da026dSBen Hutchings 37556032fb56SBen Hutchings if (efx->state != STATE_DISABLED) { 3756261e4d96SJon Cooper rc = efx_enable_interrupts(efx); 3757261e4d96SJon Cooper if (rc) 3758261e4d96SJon Cooper goto fail; 3759874aeea5SJeff Kirsher 3760874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 3761874aeea5SJeff Kirsher efx->phy_op->reconfigure(efx); 3762874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 3763874aeea5SJeff Kirsher 3764874aeea5SJeff Kirsher efx_start_all(efx); 3765874aeea5SJeff Kirsher 37669c568fd8SPeter Dunning efx_device_attach_if_not_resetting(efx); 3767874aeea5SJeff Kirsher 3768f16aeea0SBen Hutchings efx->state = STATE_READY; 3769874aeea5SJeff Kirsher 3770874aeea5SJeff Kirsher efx->type->resume_wol(efx); 37716032fb56SBen Hutchings } 3772874aeea5SJeff Kirsher 377361da026dSBen Hutchings rtnl_unlock(); 377461da026dSBen Hutchings 3775874aeea5SJeff Kirsher /* Reschedule any quenched resets scheduled during efx_pm_freeze() */ 3776874aeea5SJeff Kirsher queue_work(reset_workqueue, &efx->reset_work); 3777874aeea5SJeff Kirsher 3778874aeea5SJeff Kirsher return 0; 3779261e4d96SJon Cooper 3780261e4d96SJon Cooper fail: 3781261e4d96SJon Cooper rtnl_unlock(); 3782261e4d96SJon Cooper 3783261e4d96SJon Cooper return rc; 3784874aeea5SJeff Kirsher } 3785874aeea5SJeff Kirsher 3786874aeea5SJeff Kirsher static int efx_pm_poweroff(struct device *dev) 3787874aeea5SJeff Kirsher { 3788874aeea5SJeff Kirsher struct pci_dev *pci_dev = to_pci_dev(dev); 3789874aeea5SJeff Kirsher struct efx_nic *efx = pci_get_drvdata(pci_dev); 3790874aeea5SJeff Kirsher 3791874aeea5SJeff Kirsher efx->type->fini(efx); 3792874aeea5SJeff Kirsher 3793874aeea5SJeff Kirsher efx->reset_pending = 0; 3794874aeea5SJeff Kirsher 3795874aeea5SJeff Kirsher pci_save_state(pci_dev); 3796874aeea5SJeff Kirsher return pci_set_power_state(pci_dev, PCI_D3hot); 3797874aeea5SJeff Kirsher } 3798874aeea5SJeff Kirsher 3799874aeea5SJeff Kirsher /* Used for both resume and restore */ 3800874aeea5SJeff Kirsher static int efx_pm_resume(struct device *dev) 3801874aeea5SJeff Kirsher { 3802874aeea5SJeff Kirsher struct pci_dev *pci_dev = to_pci_dev(dev); 3803874aeea5SJeff Kirsher struct efx_nic *efx = pci_get_drvdata(pci_dev); 3804874aeea5SJeff Kirsher int rc; 3805874aeea5SJeff Kirsher 3806874aeea5SJeff Kirsher rc = pci_set_power_state(pci_dev, PCI_D0); 3807874aeea5SJeff Kirsher if (rc) 3808874aeea5SJeff Kirsher return rc; 3809874aeea5SJeff Kirsher pci_restore_state(pci_dev); 3810874aeea5SJeff Kirsher rc = pci_enable_device(pci_dev); 3811874aeea5SJeff Kirsher if (rc) 3812874aeea5SJeff Kirsher return rc; 3813874aeea5SJeff Kirsher pci_set_master(efx->pci_dev); 3814874aeea5SJeff Kirsher rc = efx->type->reset(efx, RESET_TYPE_ALL); 3815874aeea5SJeff Kirsher if (rc) 3816874aeea5SJeff Kirsher return rc; 3817193f2003SBert Kenward down_write(&efx->filter_sem); 3818874aeea5SJeff Kirsher rc = efx->type->init(efx); 3819193f2003SBert Kenward up_write(&efx->filter_sem); 3820874aeea5SJeff Kirsher if (rc) 3821874aeea5SJeff Kirsher return rc; 3822261e4d96SJon Cooper rc = efx_pm_thaw(dev); 3823261e4d96SJon Cooper return rc; 3824874aeea5SJeff Kirsher } 3825874aeea5SJeff Kirsher 3826874aeea5SJeff Kirsher static int efx_pm_suspend(struct device *dev) 3827874aeea5SJeff Kirsher { 3828874aeea5SJeff Kirsher int rc; 3829874aeea5SJeff Kirsher 3830874aeea5SJeff Kirsher efx_pm_freeze(dev); 3831874aeea5SJeff Kirsher rc = efx_pm_poweroff(dev); 3832874aeea5SJeff Kirsher if (rc) 3833874aeea5SJeff Kirsher efx_pm_resume(dev); 3834874aeea5SJeff Kirsher return rc; 3835874aeea5SJeff Kirsher } 3836874aeea5SJeff Kirsher 383718e83e4cSBen Hutchings static const struct dev_pm_ops efx_pm_ops = { 3838874aeea5SJeff Kirsher .suspend = efx_pm_suspend, 3839874aeea5SJeff Kirsher .resume = efx_pm_resume, 3840874aeea5SJeff Kirsher .freeze = efx_pm_freeze, 3841874aeea5SJeff Kirsher .thaw = efx_pm_thaw, 3842874aeea5SJeff Kirsher .poweroff = efx_pm_poweroff, 3843874aeea5SJeff Kirsher .restore = efx_pm_resume, 3844874aeea5SJeff Kirsher }; 3845874aeea5SJeff Kirsher 3846626950dbSAlexandre Rames /* A PCI error affecting this device was detected. 3847626950dbSAlexandre Rames * At this point MMIO and DMA may be disabled. 3848626950dbSAlexandre Rames * Stop the software path and request a slot reset. 3849626950dbSAlexandre Rames */ 3850debd0034Sstephen hemminger static pci_ers_result_t efx_io_error_detected(struct pci_dev *pdev, 3851626950dbSAlexandre Rames enum pci_channel_state state) 3852626950dbSAlexandre Rames { 3853626950dbSAlexandre Rames pci_ers_result_t status = PCI_ERS_RESULT_RECOVERED; 3854626950dbSAlexandre Rames struct efx_nic *efx = pci_get_drvdata(pdev); 3855626950dbSAlexandre Rames 3856626950dbSAlexandre Rames if (state == pci_channel_io_perm_failure) 3857626950dbSAlexandre Rames return PCI_ERS_RESULT_DISCONNECT; 3858626950dbSAlexandre Rames 3859626950dbSAlexandre Rames rtnl_lock(); 3860626950dbSAlexandre Rames 3861626950dbSAlexandre Rames if (efx->state != STATE_DISABLED) { 3862626950dbSAlexandre Rames efx->state = STATE_RECOVERY; 3863626950dbSAlexandre Rames efx->reset_pending = 0; 3864626950dbSAlexandre Rames 3865626950dbSAlexandre Rames efx_device_detach_sync(efx); 3866626950dbSAlexandre Rames 3867626950dbSAlexandre Rames efx_stop_all(efx); 3868d8291187SBen Hutchings efx_disable_interrupts(efx); 3869626950dbSAlexandre Rames 3870626950dbSAlexandre Rames status = PCI_ERS_RESULT_NEED_RESET; 3871626950dbSAlexandre Rames } else { 3872626950dbSAlexandre Rames /* If the interface is disabled we don't want to do anything 3873626950dbSAlexandre Rames * with it. 3874626950dbSAlexandre Rames */ 3875626950dbSAlexandre Rames status = PCI_ERS_RESULT_RECOVERED; 3876626950dbSAlexandre Rames } 3877626950dbSAlexandre Rames 3878626950dbSAlexandre Rames rtnl_unlock(); 3879626950dbSAlexandre Rames 3880626950dbSAlexandre Rames pci_disable_device(pdev); 3881626950dbSAlexandre Rames 3882626950dbSAlexandre Rames return status; 3883626950dbSAlexandre Rames } 3884626950dbSAlexandre Rames 3885dbedd44eSJoe Perches /* Fake a successful reset, which will be performed later in efx_io_resume. */ 3886debd0034Sstephen hemminger static pci_ers_result_t efx_io_slot_reset(struct pci_dev *pdev) 3887626950dbSAlexandre Rames { 3888626950dbSAlexandre Rames struct efx_nic *efx = pci_get_drvdata(pdev); 3889626950dbSAlexandre Rames pci_ers_result_t status = PCI_ERS_RESULT_RECOVERED; 3890626950dbSAlexandre Rames 3891626950dbSAlexandre Rames if (pci_enable_device(pdev)) { 3892626950dbSAlexandre Rames netif_err(efx, hw, efx->net_dev, 3893626950dbSAlexandre Rames "Cannot re-enable PCI device after reset.\n"); 3894626950dbSAlexandre Rames status = PCI_ERS_RESULT_DISCONNECT; 3895626950dbSAlexandre Rames } 3896626950dbSAlexandre Rames 3897626950dbSAlexandre Rames return status; 3898626950dbSAlexandre Rames } 3899626950dbSAlexandre Rames 3900626950dbSAlexandre Rames /* Perform the actual reset and resume I/O operations. */ 3901626950dbSAlexandre Rames static void efx_io_resume(struct pci_dev *pdev) 3902626950dbSAlexandre Rames { 3903626950dbSAlexandre Rames struct efx_nic *efx = pci_get_drvdata(pdev); 3904626950dbSAlexandre Rames int rc; 3905626950dbSAlexandre Rames 3906626950dbSAlexandre Rames rtnl_lock(); 3907626950dbSAlexandre Rames 3908626950dbSAlexandre Rames if (efx->state == STATE_DISABLED) 3909626950dbSAlexandre Rames goto out; 3910626950dbSAlexandre Rames 3911626950dbSAlexandre Rames rc = efx_reset(efx, RESET_TYPE_ALL); 3912626950dbSAlexandre Rames if (rc) { 3913626950dbSAlexandre Rames netif_err(efx, hw, efx->net_dev, 3914626950dbSAlexandre Rames "efx_reset failed after PCI error (%d)\n", rc); 3915626950dbSAlexandre Rames } else { 3916626950dbSAlexandre Rames efx->state = STATE_READY; 3917626950dbSAlexandre Rames netif_dbg(efx, hw, efx->net_dev, 3918626950dbSAlexandre Rames "Done resetting and resuming IO after PCI error.\n"); 3919626950dbSAlexandre Rames } 3920626950dbSAlexandre Rames 3921626950dbSAlexandre Rames out: 3922626950dbSAlexandre Rames rtnl_unlock(); 3923626950dbSAlexandre Rames } 3924626950dbSAlexandre Rames 3925626950dbSAlexandre Rames /* For simplicity and reliability, we always require a slot reset and try to 3926626950dbSAlexandre Rames * reset the hardware when a pci error affecting the device is detected. 3927626950dbSAlexandre Rames * We leave both the link_reset and mmio_enabled callback unimplemented: 3928626950dbSAlexandre Rames * with our request for slot reset the mmio_enabled callback will never be 3929626950dbSAlexandre Rames * called, and the link_reset callback is not used by AER or EEH mechanisms. 3930626950dbSAlexandre Rames */ 3931c300366bSJulia Lawall static const struct pci_error_handlers efx_err_handlers = { 3932626950dbSAlexandre Rames .error_detected = efx_io_error_detected, 3933626950dbSAlexandre Rames .slot_reset = efx_io_slot_reset, 3934626950dbSAlexandre Rames .resume = efx_io_resume, 3935626950dbSAlexandre Rames }; 3936626950dbSAlexandre Rames 3937874aeea5SJeff Kirsher static struct pci_driver efx_pci_driver = { 3938874aeea5SJeff Kirsher .name = KBUILD_MODNAME, 3939874aeea5SJeff Kirsher .id_table = efx_pci_table, 3940874aeea5SJeff Kirsher .probe = efx_pci_probe, 3941874aeea5SJeff Kirsher .remove = efx_pci_remove, 3942874aeea5SJeff Kirsher .driver.pm = &efx_pm_ops, 3943626950dbSAlexandre Rames .err_handler = &efx_err_handlers, 3944834e23ddSShradha Shah #ifdef CONFIG_SFC_SRIOV 3945834e23ddSShradha Shah .sriov_configure = efx_pci_sriov_configure, 3946834e23ddSShradha Shah #endif 3947874aeea5SJeff Kirsher }; 3948874aeea5SJeff Kirsher 3949874aeea5SJeff Kirsher /************************************************************************** 3950874aeea5SJeff Kirsher * 3951874aeea5SJeff Kirsher * Kernel module interface 3952874aeea5SJeff Kirsher * 3953874aeea5SJeff Kirsher *************************************************************************/ 3954874aeea5SJeff Kirsher 3955874aeea5SJeff Kirsher module_param(interrupt_mode, uint, 0444); 3956874aeea5SJeff Kirsher MODULE_PARM_DESC(interrupt_mode, 3957874aeea5SJeff Kirsher "Interrupt mode (0=>MSIX 1=>MSI 2=>legacy)"); 3958874aeea5SJeff Kirsher 3959874aeea5SJeff Kirsher static int __init efx_init_module(void) 3960874aeea5SJeff Kirsher { 3961874aeea5SJeff Kirsher int rc; 3962874aeea5SJeff Kirsher 3963874aeea5SJeff Kirsher printk(KERN_INFO "Solarflare NET driver v" EFX_DRIVER_VERSION "\n"); 3964874aeea5SJeff Kirsher 3965874aeea5SJeff Kirsher rc = register_netdevice_notifier(&efx_netdev_notifier); 3966874aeea5SJeff Kirsher if (rc) 3967874aeea5SJeff Kirsher goto err_notifier; 3968874aeea5SJeff Kirsher 39697fa8d547SShradha Shah #ifdef CONFIG_SFC_SRIOV 3970cd2d5b52SBen Hutchings rc = efx_init_sriov(); 3971cd2d5b52SBen Hutchings if (rc) 3972cd2d5b52SBen Hutchings goto err_sriov; 39737fa8d547SShradha Shah #endif 3974cd2d5b52SBen Hutchings 3975874aeea5SJeff Kirsher reset_workqueue = create_singlethread_workqueue("sfc_reset"); 3976874aeea5SJeff Kirsher if (!reset_workqueue) { 3977874aeea5SJeff Kirsher rc = -ENOMEM; 3978874aeea5SJeff Kirsher goto err_reset; 3979874aeea5SJeff Kirsher } 3980874aeea5SJeff Kirsher 3981874aeea5SJeff Kirsher rc = pci_register_driver(&efx_pci_driver); 3982874aeea5SJeff Kirsher if (rc < 0) 3983874aeea5SJeff Kirsher goto err_pci; 3984874aeea5SJeff Kirsher 3985874aeea5SJeff Kirsher return 0; 3986874aeea5SJeff Kirsher 3987874aeea5SJeff Kirsher err_pci: 3988874aeea5SJeff Kirsher destroy_workqueue(reset_workqueue); 3989874aeea5SJeff Kirsher err_reset: 39907fa8d547SShradha Shah #ifdef CONFIG_SFC_SRIOV 3991cd2d5b52SBen Hutchings efx_fini_sriov(); 3992cd2d5b52SBen Hutchings err_sriov: 39937fa8d547SShradha Shah #endif 3994874aeea5SJeff Kirsher unregister_netdevice_notifier(&efx_netdev_notifier); 3995874aeea5SJeff Kirsher err_notifier: 3996874aeea5SJeff Kirsher return rc; 3997874aeea5SJeff Kirsher } 3998874aeea5SJeff Kirsher 3999874aeea5SJeff Kirsher static void __exit efx_exit_module(void) 4000874aeea5SJeff Kirsher { 4001874aeea5SJeff Kirsher printk(KERN_INFO "Solarflare NET driver unloading\n"); 4002874aeea5SJeff Kirsher 4003874aeea5SJeff Kirsher pci_unregister_driver(&efx_pci_driver); 4004874aeea5SJeff Kirsher destroy_workqueue(reset_workqueue); 40057fa8d547SShradha Shah #ifdef CONFIG_SFC_SRIOV 4006cd2d5b52SBen Hutchings efx_fini_sriov(); 40077fa8d547SShradha Shah #endif 4008874aeea5SJeff Kirsher unregister_netdevice_notifier(&efx_netdev_notifier); 4009874aeea5SJeff Kirsher 4010874aeea5SJeff Kirsher } 4011874aeea5SJeff Kirsher 4012874aeea5SJeff Kirsher module_init(efx_init_module); 4013874aeea5SJeff Kirsher module_exit(efx_exit_module); 4014874aeea5SJeff Kirsher 4015874aeea5SJeff Kirsher MODULE_AUTHOR("Solarflare Communications and " 4016874aeea5SJeff Kirsher "Michael Brown <mbrown@fensystems.co.uk>"); 40176a350fdbSBen Hutchings MODULE_DESCRIPTION("Solarflare network driver"); 4018874aeea5SJeff Kirsher MODULE_LICENSE("GPL"); 4019874aeea5SJeff Kirsher MODULE_DEVICE_TABLE(pci, efx_pci_table); 402014077e9eSEdward Cree MODULE_VERSION(EFX_DRIVER_VERSION); 4021