1874aeea5SJeff Kirsher /**************************************************************************** 2874aeea5SJeff Kirsher * Driver for Solarflare Solarstorm network controllers and boards 3874aeea5SJeff Kirsher * Copyright 2005-2006 Fen Systems Ltd. 4874aeea5SJeff Kirsher * Copyright 2005-2011 Solarflare Communications Inc. 5874aeea5SJeff Kirsher * 6874aeea5SJeff Kirsher * This program is free software; you can redistribute it and/or modify it 7874aeea5SJeff Kirsher * under the terms of the GNU General Public License version 2 as published 8874aeea5SJeff Kirsher * by the Free Software Foundation, incorporated herein by reference. 9874aeea5SJeff Kirsher */ 10874aeea5SJeff Kirsher 11874aeea5SJeff Kirsher #include <linux/module.h> 12874aeea5SJeff Kirsher #include <linux/pci.h> 13874aeea5SJeff Kirsher #include <linux/netdevice.h> 14874aeea5SJeff Kirsher #include <linux/etherdevice.h> 15874aeea5SJeff Kirsher #include <linux/delay.h> 16874aeea5SJeff Kirsher #include <linux/notifier.h> 17874aeea5SJeff Kirsher #include <linux/ip.h> 18874aeea5SJeff Kirsher #include <linux/tcp.h> 19874aeea5SJeff Kirsher #include <linux/in.h> 20874aeea5SJeff Kirsher #include <linux/ethtool.h> 21874aeea5SJeff Kirsher #include <linux/topology.h> 22874aeea5SJeff Kirsher #include <linux/gfp.h> 23626950dbSAlexandre Rames #include <linux/aer.h> 24b28405b0SAlexandre Rames #include <linux/interrupt.h> 25874aeea5SJeff Kirsher #include "net_driver.h" 26874aeea5SJeff Kirsher #include "efx.h" 27874aeea5SJeff Kirsher #include "nic.h" 28dd40781eSBen Hutchings #include "selftest.h" 29874aeea5SJeff Kirsher 30874aeea5SJeff Kirsher #include "mcdi.h" 31874aeea5SJeff Kirsher #include "workarounds.h" 32874aeea5SJeff Kirsher 33874aeea5SJeff Kirsher /************************************************************************** 34874aeea5SJeff Kirsher * 35874aeea5SJeff Kirsher * Type name strings 36874aeea5SJeff Kirsher * 37874aeea5SJeff Kirsher ************************************************************************** 38874aeea5SJeff Kirsher */ 39874aeea5SJeff Kirsher 40874aeea5SJeff Kirsher /* Loopback mode names (see LOOPBACK_MODE()) */ 41874aeea5SJeff Kirsher const unsigned int efx_loopback_mode_max = LOOPBACK_MAX; 4218e83e4cSBen Hutchings const char *const efx_loopback_mode_names[] = { 43874aeea5SJeff Kirsher [LOOPBACK_NONE] = "NONE", 44874aeea5SJeff Kirsher [LOOPBACK_DATA] = "DATAPATH", 45874aeea5SJeff Kirsher [LOOPBACK_GMAC] = "GMAC", 46874aeea5SJeff Kirsher [LOOPBACK_XGMII] = "XGMII", 47874aeea5SJeff Kirsher [LOOPBACK_XGXS] = "XGXS", 48874aeea5SJeff Kirsher [LOOPBACK_XAUI] = "XAUI", 49874aeea5SJeff Kirsher [LOOPBACK_GMII] = "GMII", 50874aeea5SJeff Kirsher [LOOPBACK_SGMII] = "SGMII", 51874aeea5SJeff Kirsher [LOOPBACK_XGBR] = "XGBR", 52874aeea5SJeff Kirsher [LOOPBACK_XFI] = "XFI", 53874aeea5SJeff Kirsher [LOOPBACK_XAUI_FAR] = "XAUI_FAR", 54874aeea5SJeff Kirsher [LOOPBACK_GMII_FAR] = "GMII_FAR", 55874aeea5SJeff Kirsher [LOOPBACK_SGMII_FAR] = "SGMII_FAR", 56874aeea5SJeff Kirsher [LOOPBACK_XFI_FAR] = "XFI_FAR", 57874aeea5SJeff Kirsher [LOOPBACK_GPHY] = "GPHY", 58874aeea5SJeff Kirsher [LOOPBACK_PHYXS] = "PHYXS", 59874aeea5SJeff Kirsher [LOOPBACK_PCS] = "PCS", 60874aeea5SJeff Kirsher [LOOPBACK_PMAPMD] = "PMA/PMD", 61874aeea5SJeff Kirsher [LOOPBACK_XPORT] = "XPORT", 62874aeea5SJeff Kirsher [LOOPBACK_XGMII_WS] = "XGMII_WS", 63874aeea5SJeff Kirsher [LOOPBACK_XAUI_WS] = "XAUI_WS", 64874aeea5SJeff Kirsher [LOOPBACK_XAUI_WS_FAR] = "XAUI_WS_FAR", 65874aeea5SJeff Kirsher [LOOPBACK_XAUI_WS_NEAR] = "XAUI_WS_NEAR", 66874aeea5SJeff Kirsher [LOOPBACK_GMII_WS] = "GMII_WS", 67874aeea5SJeff Kirsher [LOOPBACK_XFI_WS] = "XFI_WS", 68874aeea5SJeff Kirsher [LOOPBACK_XFI_WS_FAR] = "XFI_WS_FAR", 69874aeea5SJeff Kirsher [LOOPBACK_PHYXS_WS] = "PHYXS_WS", 70874aeea5SJeff Kirsher }; 71874aeea5SJeff Kirsher 72874aeea5SJeff Kirsher const unsigned int efx_reset_type_max = RESET_TYPE_MAX; 7318e83e4cSBen Hutchings const char *const efx_reset_type_names[] = { 74874aeea5SJeff Kirsher [RESET_TYPE_INVISIBLE] = "INVISIBLE", 75874aeea5SJeff Kirsher [RESET_TYPE_ALL] = "ALL", 76626950dbSAlexandre Rames [RESET_TYPE_RECOVER_OR_ALL] = "RECOVER_OR_ALL", 77874aeea5SJeff Kirsher [RESET_TYPE_WORLD] = "WORLD", 78626950dbSAlexandre Rames [RESET_TYPE_RECOVER_OR_DISABLE] = "RECOVER_OR_DISABLE", 79874aeea5SJeff Kirsher [RESET_TYPE_DISABLE] = "DISABLE", 80874aeea5SJeff Kirsher [RESET_TYPE_TX_WATCHDOG] = "TX_WATCHDOG", 81874aeea5SJeff Kirsher [RESET_TYPE_INT_ERROR] = "INT_ERROR", 82874aeea5SJeff Kirsher [RESET_TYPE_RX_RECOVERY] = "RX_RECOVERY", 833de82b91SAlexandre Rames [RESET_TYPE_DMA_ERROR] = "DMA_ERROR", 84874aeea5SJeff Kirsher [RESET_TYPE_TX_SKIP] = "TX_SKIP", 85874aeea5SJeff Kirsher [RESET_TYPE_MC_FAILURE] = "MC_FAILURE", 86874aeea5SJeff Kirsher }; 87874aeea5SJeff Kirsher 88874aeea5SJeff Kirsher /* Reset workqueue. If any NIC has a hardware failure then a reset will be 89874aeea5SJeff Kirsher * queued onto this work queue. This is not a per-nic work queue, because 90874aeea5SJeff Kirsher * efx_reset_work() acquires the rtnl lock, so resets are naturally serialised. 91874aeea5SJeff Kirsher */ 92874aeea5SJeff Kirsher static struct workqueue_struct *reset_workqueue; 93874aeea5SJeff Kirsher 94874aeea5SJeff Kirsher /************************************************************************** 95874aeea5SJeff Kirsher * 96874aeea5SJeff Kirsher * Configurable values 97874aeea5SJeff Kirsher * 98874aeea5SJeff Kirsher *************************************************************************/ 99874aeea5SJeff Kirsher 100874aeea5SJeff Kirsher /* 101874aeea5SJeff Kirsher * Use separate channels for TX and RX events 102874aeea5SJeff Kirsher * 103874aeea5SJeff Kirsher * Set this to 1 to use separate channels for TX and RX. It allows us 104874aeea5SJeff Kirsher * to control interrupt affinity separately for TX and RX. 105874aeea5SJeff Kirsher * 106874aeea5SJeff Kirsher * This is only used in MSI-X interrupt mode 107874aeea5SJeff Kirsher */ 108b9cc977dSBen Hutchings static bool separate_tx_channels; 109b9cc977dSBen Hutchings module_param(separate_tx_channels, bool, 0444); 110874aeea5SJeff Kirsher MODULE_PARM_DESC(separate_tx_channels, 111874aeea5SJeff Kirsher "Use separate channels for TX and RX"); 112874aeea5SJeff Kirsher 113874aeea5SJeff Kirsher /* This is the weight assigned to each of the (per-channel) virtual 114874aeea5SJeff Kirsher * NAPI devices. 115874aeea5SJeff Kirsher */ 116874aeea5SJeff Kirsher static int napi_weight = 64; 117874aeea5SJeff Kirsher 118874aeea5SJeff Kirsher /* This is the time (in jiffies) between invocations of the hardware 119626950dbSAlexandre Rames * monitor. 120626950dbSAlexandre Rames * On Falcon-based NICs, this will: 121874aeea5SJeff Kirsher * - Check the on-board hardware monitor; 122874aeea5SJeff Kirsher * - Poll the link state and reconfigure the hardware as necessary. 123626950dbSAlexandre Rames * On Siena-based NICs for power systems with EEH support, this will give EEH a 124626950dbSAlexandre Rames * chance to start. 125874aeea5SJeff Kirsher */ 126874aeea5SJeff Kirsher static unsigned int efx_monitor_interval = 1 * HZ; 127874aeea5SJeff Kirsher 128874aeea5SJeff Kirsher /* Initial interrupt moderation settings. They can be modified after 129874aeea5SJeff Kirsher * module load with ethtool. 130874aeea5SJeff Kirsher * 131874aeea5SJeff Kirsher * The default for RX should strike a balance between increasing the 132874aeea5SJeff Kirsher * round-trip latency and reducing overhead. 133874aeea5SJeff Kirsher */ 134874aeea5SJeff Kirsher static unsigned int rx_irq_mod_usec = 60; 135874aeea5SJeff Kirsher 136874aeea5SJeff Kirsher /* Initial interrupt moderation settings. They can be modified after 137874aeea5SJeff Kirsher * module load with ethtool. 138874aeea5SJeff Kirsher * 139874aeea5SJeff Kirsher * This default is chosen to ensure that a 10G link does not go idle 140874aeea5SJeff Kirsher * while a TX queue is stopped after it has become full. A queue is 141874aeea5SJeff Kirsher * restarted when it drops below half full. The time this takes (assuming 142874aeea5SJeff Kirsher * worst case 3 descriptors per packet and 1024 descriptors) is 143874aeea5SJeff Kirsher * 512 / 3 * 1.2 = 205 usec. 144874aeea5SJeff Kirsher */ 145874aeea5SJeff Kirsher static unsigned int tx_irq_mod_usec = 150; 146874aeea5SJeff Kirsher 147874aeea5SJeff Kirsher /* This is the first interrupt mode to try out of: 148874aeea5SJeff Kirsher * 0 => MSI-X 149874aeea5SJeff Kirsher * 1 => MSI 150874aeea5SJeff Kirsher * 2 => legacy 151874aeea5SJeff Kirsher */ 152874aeea5SJeff Kirsher static unsigned int interrupt_mode; 153874aeea5SJeff Kirsher 154874aeea5SJeff Kirsher /* This is the requested number of CPUs to use for Receive-Side Scaling (RSS), 155874aeea5SJeff Kirsher * i.e. the number of CPUs among which we may distribute simultaneous 156874aeea5SJeff Kirsher * interrupt handling. 157874aeea5SJeff Kirsher * 158874aeea5SJeff Kirsher * Cards without MSI-X will only target one CPU via legacy or MSI interrupt. 159cdb08f8fSBen Hutchings * The default (0) means to assign an interrupt to each core. 160874aeea5SJeff Kirsher */ 161874aeea5SJeff Kirsher static unsigned int rss_cpus; 162874aeea5SJeff Kirsher module_param(rss_cpus, uint, 0444); 163874aeea5SJeff Kirsher MODULE_PARM_DESC(rss_cpus, "Number of CPUs to use for Receive-Side Scaling"); 164874aeea5SJeff Kirsher 165b9cc977dSBen Hutchings static bool phy_flash_cfg; 166b9cc977dSBen Hutchings module_param(phy_flash_cfg, bool, 0644); 167874aeea5SJeff Kirsher MODULE_PARM_DESC(phy_flash_cfg, "Set PHYs into reflash mode initially"); 168874aeea5SJeff Kirsher 169e7bed9c8SBen Hutchings static unsigned irq_adapt_low_thresh = 8000; 170874aeea5SJeff Kirsher module_param(irq_adapt_low_thresh, uint, 0644); 171874aeea5SJeff Kirsher MODULE_PARM_DESC(irq_adapt_low_thresh, 172874aeea5SJeff Kirsher "Threshold score for reducing IRQ moderation"); 173874aeea5SJeff Kirsher 174e7bed9c8SBen Hutchings static unsigned irq_adapt_high_thresh = 16000; 175874aeea5SJeff Kirsher module_param(irq_adapt_high_thresh, uint, 0644); 176874aeea5SJeff Kirsher MODULE_PARM_DESC(irq_adapt_high_thresh, 177874aeea5SJeff Kirsher "Threshold score for increasing IRQ moderation"); 178874aeea5SJeff Kirsher 179874aeea5SJeff Kirsher static unsigned debug = (NETIF_MSG_DRV | NETIF_MSG_PROBE | 180874aeea5SJeff Kirsher NETIF_MSG_LINK | NETIF_MSG_IFDOWN | 181874aeea5SJeff Kirsher NETIF_MSG_IFUP | NETIF_MSG_RX_ERR | 182874aeea5SJeff Kirsher NETIF_MSG_TX_ERR | NETIF_MSG_HW); 183874aeea5SJeff Kirsher module_param(debug, uint, 0); 184874aeea5SJeff Kirsher MODULE_PARM_DESC(debug, "Bitmapped debugging message enable value"); 185874aeea5SJeff Kirsher 186874aeea5SJeff Kirsher /************************************************************************** 187874aeea5SJeff Kirsher * 188874aeea5SJeff Kirsher * Utility functions and prototypes 189874aeea5SJeff Kirsher * 190874aeea5SJeff Kirsher *************************************************************************/ 191874aeea5SJeff Kirsher 192d8291187SBen Hutchings static void efx_soft_enable_interrupts(struct efx_nic *efx); 193d8291187SBen Hutchings static void efx_soft_disable_interrupts(struct efx_nic *efx); 1947f967c01SBen Hutchings static void efx_remove_channel(struct efx_channel *channel); 195874aeea5SJeff Kirsher static void efx_remove_channels(struct efx_nic *efx); 1967f967c01SBen Hutchings static const struct efx_channel_type efx_default_channel_type; 197874aeea5SJeff Kirsher static void efx_remove_port(struct efx_nic *efx); 1987f967c01SBen Hutchings static void efx_init_napi_channel(struct efx_channel *channel); 199874aeea5SJeff Kirsher static void efx_fini_napi(struct efx_nic *efx); 200874aeea5SJeff Kirsher static void efx_fini_napi_channel(struct efx_channel *channel); 201874aeea5SJeff Kirsher static void efx_fini_struct(struct efx_nic *efx); 202874aeea5SJeff Kirsher static void efx_start_all(struct efx_nic *efx); 203874aeea5SJeff Kirsher static void efx_stop_all(struct efx_nic *efx); 204874aeea5SJeff Kirsher 205874aeea5SJeff Kirsher #define EFX_ASSERT_RESET_SERIALISED(efx) \ 206874aeea5SJeff Kirsher do { \ 207f16aeea0SBen Hutchings if ((efx->state == STATE_READY) || \ 208626950dbSAlexandre Rames (efx->state == STATE_RECOVERY) || \ 209874aeea5SJeff Kirsher (efx->state == STATE_DISABLED)) \ 210874aeea5SJeff Kirsher ASSERT_RTNL(); \ 211874aeea5SJeff Kirsher } while (0) 212874aeea5SJeff Kirsher 2138b7325b4SBen Hutchings static int efx_check_disabled(struct efx_nic *efx) 2148b7325b4SBen Hutchings { 215626950dbSAlexandre Rames if (efx->state == STATE_DISABLED || efx->state == STATE_RECOVERY) { 2168b7325b4SBen Hutchings netif_err(efx, drv, efx->net_dev, 2178b7325b4SBen Hutchings "device is disabled due to earlier errors\n"); 2188b7325b4SBen Hutchings return -EIO; 2198b7325b4SBen Hutchings } 2208b7325b4SBen Hutchings return 0; 2218b7325b4SBen Hutchings } 2228b7325b4SBen Hutchings 223874aeea5SJeff Kirsher /************************************************************************** 224874aeea5SJeff Kirsher * 225874aeea5SJeff Kirsher * Event queue processing 226874aeea5SJeff Kirsher * 227874aeea5SJeff Kirsher *************************************************************************/ 228874aeea5SJeff Kirsher 229874aeea5SJeff Kirsher /* Process channel's event queue 230874aeea5SJeff Kirsher * 231874aeea5SJeff Kirsher * This function is responsible for processing the event queue of a 232874aeea5SJeff Kirsher * single channel. The caller must guarantee that this function will 233874aeea5SJeff Kirsher * never be concurrently called more than once on the same channel, 234874aeea5SJeff Kirsher * though different channels may be being processed concurrently. 235874aeea5SJeff Kirsher */ 236874aeea5SJeff Kirsher static int efx_process_channel(struct efx_channel *channel, int budget) 237874aeea5SJeff Kirsher { 238874aeea5SJeff Kirsher int spent; 239874aeea5SJeff Kirsher 2409f2cb71cSBen Hutchings if (unlikely(!channel->enabled)) 241874aeea5SJeff Kirsher return 0; 242874aeea5SJeff Kirsher 243874aeea5SJeff Kirsher spent = efx_nic_process_eventq(channel, budget); 244d9ab7007SBen Hutchings if (spent && efx_channel_has_rx_queue(channel)) { 245d9ab7007SBen Hutchings struct efx_rx_queue *rx_queue = 246d9ab7007SBen Hutchings efx_channel_get_rx_queue(channel); 247874aeea5SJeff Kirsher 248ff734ef4SBen Hutchings efx_rx_flush_packet(channel); 249d9ab7007SBen Hutchings efx_fast_push_rx_descriptors(rx_queue); 250d9ab7007SBen Hutchings } 251874aeea5SJeff Kirsher 252874aeea5SJeff Kirsher return spent; 253874aeea5SJeff Kirsher } 254874aeea5SJeff Kirsher 255874aeea5SJeff Kirsher /* NAPI poll handler 256874aeea5SJeff Kirsher * 257874aeea5SJeff Kirsher * NAPI guarantees serialisation of polls of the same device, which 258874aeea5SJeff Kirsher * provides the guarantee required by efx_process_channel(). 259874aeea5SJeff Kirsher */ 260874aeea5SJeff Kirsher static int efx_poll(struct napi_struct *napi, int budget) 261874aeea5SJeff Kirsher { 262874aeea5SJeff Kirsher struct efx_channel *channel = 263874aeea5SJeff Kirsher container_of(napi, struct efx_channel, napi_str); 264874aeea5SJeff Kirsher struct efx_nic *efx = channel->efx; 265874aeea5SJeff Kirsher int spent; 266874aeea5SJeff Kirsher 267874aeea5SJeff Kirsher netif_vdbg(efx, intr, efx->net_dev, 268874aeea5SJeff Kirsher "channel %d NAPI poll executing on CPU %d\n", 269874aeea5SJeff Kirsher channel->channel, raw_smp_processor_id()); 270874aeea5SJeff Kirsher 271874aeea5SJeff Kirsher spent = efx_process_channel(channel, budget); 272874aeea5SJeff Kirsher 273874aeea5SJeff Kirsher if (spent < budget) { 2749d9a6973SBen Hutchings if (efx_channel_has_rx_queue(channel) && 275874aeea5SJeff Kirsher efx->irq_rx_adaptive && 276874aeea5SJeff Kirsher unlikely(++channel->irq_count == 1000)) { 277874aeea5SJeff Kirsher if (unlikely(channel->irq_mod_score < 278874aeea5SJeff Kirsher irq_adapt_low_thresh)) { 279874aeea5SJeff Kirsher if (channel->irq_moderation > 1) { 280874aeea5SJeff Kirsher channel->irq_moderation -= 1; 281874aeea5SJeff Kirsher efx->type->push_irq_moderation(channel); 282874aeea5SJeff Kirsher } 283874aeea5SJeff Kirsher } else if (unlikely(channel->irq_mod_score > 284874aeea5SJeff Kirsher irq_adapt_high_thresh)) { 285874aeea5SJeff Kirsher if (channel->irq_moderation < 286874aeea5SJeff Kirsher efx->irq_rx_moderation) { 287874aeea5SJeff Kirsher channel->irq_moderation += 1; 288874aeea5SJeff Kirsher efx->type->push_irq_moderation(channel); 289874aeea5SJeff Kirsher } 290874aeea5SJeff Kirsher } 291874aeea5SJeff Kirsher channel->irq_count = 0; 292874aeea5SJeff Kirsher channel->irq_mod_score = 0; 293874aeea5SJeff Kirsher } 294874aeea5SJeff Kirsher 295874aeea5SJeff Kirsher efx_filter_rfs_expire(channel); 296874aeea5SJeff Kirsher 297874aeea5SJeff Kirsher /* There is no race here; although napi_disable() will 298874aeea5SJeff Kirsher * only wait for napi_complete(), this isn't a problem 299514bedbcSBen Hutchings * since efx_nic_eventq_read_ack() will have no effect if 300874aeea5SJeff Kirsher * interrupts have already been disabled. 301874aeea5SJeff Kirsher */ 302874aeea5SJeff Kirsher napi_complete(napi); 303514bedbcSBen Hutchings efx_nic_eventq_read_ack(channel); 304874aeea5SJeff Kirsher } 305874aeea5SJeff Kirsher 306874aeea5SJeff Kirsher return spent; 307874aeea5SJeff Kirsher } 308874aeea5SJeff Kirsher 309874aeea5SJeff Kirsher /* Create event queue 310874aeea5SJeff Kirsher * Event queue memory allocations are done only once. If the channel 311874aeea5SJeff Kirsher * is reset, the memory buffer will be reused; this guards against 312874aeea5SJeff Kirsher * errors during channel reset and also simplifies interrupt handling. 313874aeea5SJeff Kirsher */ 314874aeea5SJeff Kirsher static int efx_probe_eventq(struct efx_channel *channel) 315874aeea5SJeff Kirsher { 316874aeea5SJeff Kirsher struct efx_nic *efx = channel->efx; 317874aeea5SJeff Kirsher unsigned long entries; 318874aeea5SJeff Kirsher 31986ee5302SBen Hutchings netif_dbg(efx, probe, efx->net_dev, 320874aeea5SJeff Kirsher "chan %d create event queue\n", channel->channel); 321874aeea5SJeff Kirsher 322874aeea5SJeff Kirsher /* Build an event queue with room for one event per tx and rx buffer, 323874aeea5SJeff Kirsher * plus some extra for link state events and MCDI completions. */ 324874aeea5SJeff Kirsher entries = roundup_pow_of_two(efx->rxq_entries + efx->txq_entries + 128); 325874aeea5SJeff Kirsher EFX_BUG_ON_PARANOID(entries > EFX_MAX_EVQ_SIZE); 326874aeea5SJeff Kirsher channel->eventq_mask = max(entries, EFX_MIN_EVQ_SIZE) - 1; 327874aeea5SJeff Kirsher 328874aeea5SJeff Kirsher return efx_nic_probe_eventq(channel); 329874aeea5SJeff Kirsher } 330874aeea5SJeff Kirsher 331874aeea5SJeff Kirsher /* Prepare channel's event queue */ 332874aeea5SJeff Kirsher static void efx_init_eventq(struct efx_channel *channel) 333874aeea5SJeff Kirsher { 334874aeea5SJeff Kirsher netif_dbg(channel->efx, drv, channel->efx->net_dev, 335874aeea5SJeff Kirsher "chan %d init event queue\n", channel->channel); 336874aeea5SJeff Kirsher 337874aeea5SJeff Kirsher channel->eventq_read_ptr = 0; 338874aeea5SJeff Kirsher 339874aeea5SJeff Kirsher efx_nic_init_eventq(channel); 340be3fc09cSBen Hutchings channel->eventq_init = true; 341874aeea5SJeff Kirsher } 342874aeea5SJeff Kirsher 3439f2cb71cSBen Hutchings /* Enable event queue processing and NAPI */ 3449f2cb71cSBen Hutchings static void efx_start_eventq(struct efx_channel *channel) 3459f2cb71cSBen Hutchings { 3469f2cb71cSBen Hutchings netif_dbg(channel->efx, ifup, channel->efx->net_dev, 3479f2cb71cSBen Hutchings "chan %d start event queue\n", channel->channel); 3489f2cb71cSBen Hutchings 349514bedbcSBen Hutchings /* Make sure the NAPI handler sees the enabled flag set */ 3509f2cb71cSBen Hutchings channel->enabled = true; 3519f2cb71cSBen Hutchings smp_wmb(); 3529f2cb71cSBen Hutchings 3539f2cb71cSBen Hutchings napi_enable(&channel->napi_str); 3549f2cb71cSBen Hutchings efx_nic_eventq_read_ack(channel); 3559f2cb71cSBen Hutchings } 3569f2cb71cSBen Hutchings 3579f2cb71cSBen Hutchings /* Disable event queue processing and NAPI */ 3589f2cb71cSBen Hutchings static void efx_stop_eventq(struct efx_channel *channel) 3599f2cb71cSBen Hutchings { 3609f2cb71cSBen Hutchings if (!channel->enabled) 3619f2cb71cSBen Hutchings return; 3629f2cb71cSBen Hutchings 3639f2cb71cSBen Hutchings napi_disable(&channel->napi_str); 3649f2cb71cSBen Hutchings channel->enabled = false; 3659f2cb71cSBen Hutchings } 3669f2cb71cSBen Hutchings 367874aeea5SJeff Kirsher static void efx_fini_eventq(struct efx_channel *channel) 368874aeea5SJeff Kirsher { 369be3fc09cSBen Hutchings if (!channel->eventq_init) 370be3fc09cSBen Hutchings return; 371be3fc09cSBen Hutchings 372874aeea5SJeff Kirsher netif_dbg(channel->efx, drv, channel->efx->net_dev, 373874aeea5SJeff Kirsher "chan %d fini event queue\n", channel->channel); 374874aeea5SJeff Kirsher 375874aeea5SJeff Kirsher efx_nic_fini_eventq(channel); 376be3fc09cSBen Hutchings channel->eventq_init = false; 377874aeea5SJeff Kirsher } 378874aeea5SJeff Kirsher 379874aeea5SJeff Kirsher static void efx_remove_eventq(struct efx_channel *channel) 380874aeea5SJeff Kirsher { 381874aeea5SJeff Kirsher netif_dbg(channel->efx, drv, channel->efx->net_dev, 382874aeea5SJeff Kirsher "chan %d remove event queue\n", channel->channel); 383874aeea5SJeff Kirsher 384874aeea5SJeff Kirsher efx_nic_remove_eventq(channel); 385874aeea5SJeff Kirsher } 386874aeea5SJeff Kirsher 387874aeea5SJeff Kirsher /************************************************************************** 388874aeea5SJeff Kirsher * 389874aeea5SJeff Kirsher * Channel handling 390874aeea5SJeff Kirsher * 391874aeea5SJeff Kirsher *************************************************************************/ 392874aeea5SJeff Kirsher 3937f967c01SBen Hutchings /* Allocate and initialise a channel structure. */ 394874aeea5SJeff Kirsher static struct efx_channel * 395874aeea5SJeff Kirsher efx_alloc_channel(struct efx_nic *efx, int i, struct efx_channel *old_channel) 396874aeea5SJeff Kirsher { 397874aeea5SJeff Kirsher struct efx_channel *channel; 398874aeea5SJeff Kirsher struct efx_rx_queue *rx_queue; 399874aeea5SJeff Kirsher struct efx_tx_queue *tx_queue; 400874aeea5SJeff Kirsher int j; 401874aeea5SJeff Kirsher 4027f967c01SBen Hutchings channel = kzalloc(sizeof(*channel), GFP_KERNEL); 4037f967c01SBen Hutchings if (!channel) 4047f967c01SBen Hutchings return NULL; 4057f967c01SBen Hutchings 4067f967c01SBen Hutchings channel->efx = efx; 4077f967c01SBen Hutchings channel->channel = i; 4087f967c01SBen Hutchings channel->type = &efx_default_channel_type; 4097f967c01SBen Hutchings 4107f967c01SBen Hutchings for (j = 0; j < EFX_TXQ_TYPES; j++) { 4117f967c01SBen Hutchings tx_queue = &channel->tx_queue[j]; 4127f967c01SBen Hutchings tx_queue->efx = efx; 4137f967c01SBen Hutchings tx_queue->queue = i * EFX_TXQ_TYPES + j; 4147f967c01SBen Hutchings tx_queue->channel = channel; 4157f967c01SBen Hutchings } 4167f967c01SBen Hutchings 4177f967c01SBen Hutchings rx_queue = &channel->rx_queue; 4187f967c01SBen Hutchings rx_queue->efx = efx; 4197f967c01SBen Hutchings setup_timer(&rx_queue->slow_fill, efx_rx_slow_fill, 4207f967c01SBen Hutchings (unsigned long)rx_queue); 4217f967c01SBen Hutchings 4227f967c01SBen Hutchings return channel; 4237f967c01SBen Hutchings } 4247f967c01SBen Hutchings 4257f967c01SBen Hutchings /* Allocate and initialise a channel structure, copying parameters 4267f967c01SBen Hutchings * (but not resources) from an old channel structure. 4277f967c01SBen Hutchings */ 4287f967c01SBen Hutchings static struct efx_channel * 4297f967c01SBen Hutchings efx_copy_channel(const struct efx_channel *old_channel) 4307f967c01SBen Hutchings { 4317f967c01SBen Hutchings struct efx_channel *channel; 4327f967c01SBen Hutchings struct efx_rx_queue *rx_queue; 4337f967c01SBen Hutchings struct efx_tx_queue *tx_queue; 4347f967c01SBen Hutchings int j; 4357f967c01SBen Hutchings 436874aeea5SJeff Kirsher channel = kmalloc(sizeof(*channel), GFP_KERNEL); 437874aeea5SJeff Kirsher if (!channel) 438874aeea5SJeff Kirsher return NULL; 439874aeea5SJeff Kirsher 440874aeea5SJeff Kirsher *channel = *old_channel; 441874aeea5SJeff Kirsher 442874aeea5SJeff Kirsher channel->napi_dev = NULL; 443874aeea5SJeff Kirsher memset(&channel->eventq, 0, sizeof(channel->eventq)); 444874aeea5SJeff Kirsher 445874aeea5SJeff Kirsher for (j = 0; j < EFX_TXQ_TYPES; j++) { 446874aeea5SJeff Kirsher tx_queue = &channel->tx_queue[j]; 447874aeea5SJeff Kirsher if (tx_queue->channel) 448874aeea5SJeff Kirsher tx_queue->channel = channel; 449874aeea5SJeff Kirsher tx_queue->buffer = NULL; 450874aeea5SJeff Kirsher memset(&tx_queue->txd, 0, sizeof(tx_queue->txd)); 451874aeea5SJeff Kirsher } 452874aeea5SJeff Kirsher 453874aeea5SJeff Kirsher rx_queue = &channel->rx_queue; 4547f967c01SBen Hutchings rx_queue->buffer = NULL; 4557f967c01SBen Hutchings memset(&rx_queue->rxd, 0, sizeof(rx_queue->rxd)); 456874aeea5SJeff Kirsher setup_timer(&rx_queue->slow_fill, efx_rx_slow_fill, 457874aeea5SJeff Kirsher (unsigned long)rx_queue); 458874aeea5SJeff Kirsher 459874aeea5SJeff Kirsher return channel; 460874aeea5SJeff Kirsher } 461874aeea5SJeff Kirsher 462874aeea5SJeff Kirsher static int efx_probe_channel(struct efx_channel *channel) 463874aeea5SJeff Kirsher { 464874aeea5SJeff Kirsher struct efx_tx_queue *tx_queue; 465874aeea5SJeff Kirsher struct efx_rx_queue *rx_queue; 466874aeea5SJeff Kirsher int rc; 467874aeea5SJeff Kirsher 468874aeea5SJeff Kirsher netif_dbg(channel->efx, probe, channel->efx->net_dev, 469874aeea5SJeff Kirsher "creating channel %d\n", channel->channel); 470874aeea5SJeff Kirsher 4717f967c01SBen Hutchings rc = channel->type->pre_probe(channel); 4727f967c01SBen Hutchings if (rc) 4737f967c01SBen Hutchings goto fail; 4747f967c01SBen Hutchings 475874aeea5SJeff Kirsher rc = efx_probe_eventq(channel); 476874aeea5SJeff Kirsher if (rc) 4777f967c01SBen Hutchings goto fail; 478874aeea5SJeff Kirsher 479874aeea5SJeff Kirsher efx_for_each_channel_tx_queue(tx_queue, channel) { 480874aeea5SJeff Kirsher rc = efx_probe_tx_queue(tx_queue); 481874aeea5SJeff Kirsher if (rc) 4827f967c01SBen Hutchings goto fail; 483874aeea5SJeff Kirsher } 484874aeea5SJeff Kirsher 485874aeea5SJeff Kirsher efx_for_each_channel_rx_queue(rx_queue, channel) { 486874aeea5SJeff Kirsher rc = efx_probe_rx_queue(rx_queue); 487874aeea5SJeff Kirsher if (rc) 4887f967c01SBen Hutchings goto fail; 489874aeea5SJeff Kirsher } 490874aeea5SJeff Kirsher 491874aeea5SJeff Kirsher channel->n_rx_frm_trunc = 0; 492874aeea5SJeff Kirsher 493874aeea5SJeff Kirsher return 0; 494874aeea5SJeff Kirsher 4957f967c01SBen Hutchings fail: 4967f967c01SBen Hutchings efx_remove_channel(channel); 497874aeea5SJeff Kirsher return rc; 498874aeea5SJeff Kirsher } 499874aeea5SJeff Kirsher 5007f967c01SBen Hutchings static void 5017f967c01SBen Hutchings efx_get_channel_name(struct efx_channel *channel, char *buf, size_t len) 5027f967c01SBen Hutchings { 5037f967c01SBen Hutchings struct efx_nic *efx = channel->efx; 5047f967c01SBen Hutchings const char *type; 5057f967c01SBen Hutchings int number; 5067f967c01SBen Hutchings 5077f967c01SBen Hutchings number = channel->channel; 5087f967c01SBen Hutchings if (efx->tx_channel_offset == 0) { 5097f967c01SBen Hutchings type = ""; 5107f967c01SBen Hutchings } else if (channel->channel < efx->tx_channel_offset) { 5117f967c01SBen Hutchings type = "-rx"; 5127f967c01SBen Hutchings } else { 5137f967c01SBen Hutchings type = "-tx"; 5147f967c01SBen Hutchings number -= efx->tx_channel_offset; 5157f967c01SBen Hutchings } 5167f967c01SBen Hutchings snprintf(buf, len, "%s%s-%d", efx->name, type, number); 5177f967c01SBen Hutchings } 518874aeea5SJeff Kirsher 519874aeea5SJeff Kirsher static void efx_set_channel_names(struct efx_nic *efx) 520874aeea5SJeff Kirsher { 521874aeea5SJeff Kirsher struct efx_channel *channel; 522874aeea5SJeff Kirsher 5237f967c01SBen Hutchings efx_for_each_channel(channel, efx) 5247f967c01SBen Hutchings channel->type->get_name(channel, 525d8291187SBen Hutchings efx->msi_context[channel->channel].name, 526d8291187SBen Hutchings sizeof(efx->msi_context[0].name)); 527874aeea5SJeff Kirsher } 528874aeea5SJeff Kirsher 529874aeea5SJeff Kirsher static int efx_probe_channels(struct efx_nic *efx) 530874aeea5SJeff Kirsher { 531874aeea5SJeff Kirsher struct efx_channel *channel; 532874aeea5SJeff Kirsher int rc; 533874aeea5SJeff Kirsher 534874aeea5SJeff Kirsher /* Restart special buffer allocation */ 535874aeea5SJeff Kirsher efx->next_buffer_table = 0; 536874aeea5SJeff Kirsher 537c92aaff1SBen Hutchings /* Probe channels in reverse, so that any 'extra' channels 538c92aaff1SBen Hutchings * use the start of the buffer table. This allows the traffic 539c92aaff1SBen Hutchings * channels to be resized without moving them or wasting the 540c92aaff1SBen Hutchings * entries before them. 541c92aaff1SBen Hutchings */ 542c92aaff1SBen Hutchings efx_for_each_channel_rev(channel, efx) { 543874aeea5SJeff Kirsher rc = efx_probe_channel(channel); 544874aeea5SJeff Kirsher if (rc) { 545874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 546874aeea5SJeff Kirsher "failed to create channel %d\n", 547874aeea5SJeff Kirsher channel->channel); 548874aeea5SJeff Kirsher goto fail; 549874aeea5SJeff Kirsher } 550874aeea5SJeff Kirsher } 551874aeea5SJeff Kirsher efx_set_channel_names(efx); 552874aeea5SJeff Kirsher 553874aeea5SJeff Kirsher return 0; 554874aeea5SJeff Kirsher 555874aeea5SJeff Kirsher fail: 556874aeea5SJeff Kirsher efx_remove_channels(efx); 557874aeea5SJeff Kirsher return rc; 558874aeea5SJeff Kirsher } 559874aeea5SJeff Kirsher 560874aeea5SJeff Kirsher /* Channels are shutdown and reinitialised whilst the NIC is running 561874aeea5SJeff Kirsher * to propagate configuration changes (mtu, checksum offload), or 562874aeea5SJeff Kirsher * to clear hardware error conditions 563874aeea5SJeff Kirsher */ 5649f2cb71cSBen Hutchings static void efx_start_datapath(struct efx_nic *efx) 565874aeea5SJeff Kirsher { 56685740cdfSBen Hutchings bool old_rx_scatter = efx->rx_scatter; 567874aeea5SJeff Kirsher struct efx_tx_queue *tx_queue; 568874aeea5SJeff Kirsher struct efx_rx_queue *rx_queue; 569874aeea5SJeff Kirsher struct efx_channel *channel; 57085740cdfSBen Hutchings size_t rx_buf_len; 571874aeea5SJeff Kirsher 572874aeea5SJeff Kirsher /* Calculate the rx buffer allocation parameters required to 573874aeea5SJeff Kirsher * support the current MTU, including padding for header 574874aeea5SJeff Kirsher * alignment and overruns. 575874aeea5SJeff Kirsher */ 57643a3739dSJon Cooper efx->rx_dma_len = (efx->rx_prefix_size + 577874aeea5SJeff Kirsher EFX_MAX_FRAME_LEN(efx->net_dev->mtu) + 578874aeea5SJeff Kirsher efx->type->rx_buffer_padding); 57985740cdfSBen Hutchings rx_buf_len = (sizeof(struct efx_rx_page_state) + 580c14ff2eaSBen Hutchings NET_IP_ALIGN + efx->rx_dma_len); 58185740cdfSBen Hutchings if (rx_buf_len <= PAGE_SIZE) { 58285740cdfSBen Hutchings efx->rx_scatter = false; 58385740cdfSBen Hutchings efx->rx_buffer_order = 0; 58485740cdfSBen Hutchings } else if (efx->type->can_rx_scatter) { 585950c54dfSBen Hutchings BUILD_BUG_ON(EFX_RX_USR_BUF_SIZE % L1_CACHE_BYTES); 58685740cdfSBen Hutchings BUILD_BUG_ON(sizeof(struct efx_rx_page_state) + 587950c54dfSBen Hutchings 2 * ALIGN(NET_IP_ALIGN + EFX_RX_USR_BUF_SIZE, 588950c54dfSBen Hutchings EFX_RX_BUF_ALIGNMENT) > 589950c54dfSBen Hutchings PAGE_SIZE); 59085740cdfSBen Hutchings efx->rx_scatter = true; 59185740cdfSBen Hutchings efx->rx_dma_len = EFX_RX_USR_BUF_SIZE; 59285740cdfSBen Hutchings efx->rx_buffer_order = 0; 59385740cdfSBen Hutchings } else { 59485740cdfSBen Hutchings efx->rx_scatter = false; 59585740cdfSBen Hutchings efx->rx_buffer_order = get_order(rx_buf_len); 59685740cdfSBen Hutchings } 59785740cdfSBen Hutchings 5981648a23fSDaniel Pieczko efx_rx_config_page_split(efx); 5991648a23fSDaniel Pieczko if (efx->rx_buffer_order) 6001648a23fSDaniel Pieczko netif_dbg(efx, drv, efx->net_dev, 6011648a23fSDaniel Pieczko "RX buf len=%u; page order=%u batch=%u\n", 6021648a23fSDaniel Pieczko efx->rx_dma_len, efx->rx_buffer_order, 6031648a23fSDaniel Pieczko efx->rx_pages_per_batch); 6041648a23fSDaniel Pieczko else 6051648a23fSDaniel Pieczko netif_dbg(efx, drv, efx->net_dev, 6061648a23fSDaniel Pieczko "RX buf len=%u step=%u bpp=%u; page batch=%u\n", 6071648a23fSDaniel Pieczko efx->rx_dma_len, efx->rx_page_buf_step, 6081648a23fSDaniel Pieczko efx->rx_bufs_per_page, efx->rx_pages_per_batch); 6092768935aSDaniel Pieczko 61085740cdfSBen Hutchings /* RX filters also have scatter-enabled flags */ 61185740cdfSBen Hutchings if (efx->rx_scatter != old_rx_scatter) 612add72477SBen Hutchings efx->type->filter_update_rx_scatter(efx); 613874aeea5SJeff Kirsher 61414bf718fSBen Hutchings /* We must keep at least one descriptor in a TX ring empty. 61514bf718fSBen Hutchings * We could avoid this when the queue size does not exactly 61614bf718fSBen Hutchings * match the hardware ring size, but it's not that important. 61714bf718fSBen Hutchings * Therefore we stop the queue when one more skb might fill 61814bf718fSBen Hutchings * the ring completely. We wake it when half way back to 61914bf718fSBen Hutchings * empty. 62014bf718fSBen Hutchings */ 62114bf718fSBen Hutchings efx->txq_stop_thresh = efx->txq_entries - efx_tx_max_skb_descs(efx); 62214bf718fSBen Hutchings efx->txq_wake_thresh = efx->txq_stop_thresh / 2; 62314bf718fSBen Hutchings 624874aeea5SJeff Kirsher /* Initialise the channels */ 625874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) { 626874aeea5SJeff Kirsher efx_for_each_channel_tx_queue(tx_queue, channel) 627874aeea5SJeff Kirsher efx_init_tx_queue(tx_queue); 628874aeea5SJeff Kirsher 6299f2cb71cSBen Hutchings efx_for_each_channel_rx_queue(rx_queue, channel) { 630874aeea5SJeff Kirsher efx_init_rx_queue(rx_queue); 6319f2cb71cSBen Hutchings efx_nic_generate_fill_event(rx_queue); 6329f2cb71cSBen Hutchings } 633874aeea5SJeff Kirsher 63485740cdfSBen Hutchings WARN_ON(channel->rx_pkt_n_frags); 635874aeea5SJeff Kirsher } 6369f2cb71cSBen Hutchings 6379f2cb71cSBen Hutchings if (netif_device_present(efx->net_dev)) 6389f2cb71cSBen Hutchings netif_tx_wake_all_queues(efx->net_dev); 639874aeea5SJeff Kirsher } 640874aeea5SJeff Kirsher 6419f2cb71cSBen Hutchings static void efx_stop_datapath(struct efx_nic *efx) 642874aeea5SJeff Kirsher { 643874aeea5SJeff Kirsher struct efx_channel *channel; 644874aeea5SJeff Kirsher struct efx_tx_queue *tx_queue; 645874aeea5SJeff Kirsher struct efx_rx_queue *rx_queue; 646874aeea5SJeff Kirsher int rc; 647874aeea5SJeff Kirsher 648874aeea5SJeff Kirsher EFX_ASSERT_RESET_SERIALISED(efx); 649874aeea5SJeff Kirsher BUG_ON(efx->port_enabled); 650874aeea5SJeff Kirsher 651d8aec745SBen Hutchings /* Stop RX refill */ 652d8aec745SBen Hutchings efx_for_each_channel(channel, efx) { 653d8aec745SBen Hutchings efx_for_each_channel_rx_queue(rx_queue, channel) 654d8aec745SBen Hutchings rx_queue->refill_enabled = false; 655d8aec745SBen Hutchings } 656d8aec745SBen Hutchings 657874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) { 6589f2cb71cSBen Hutchings /* RX packet processing is pipelined, so wait for the 6599f2cb71cSBen Hutchings * NAPI handler to complete. At least event queue 0 6609f2cb71cSBen Hutchings * might be kept active by non-data events, so don't 6619f2cb71cSBen Hutchings * use napi_synchronize() but actually disable NAPI 6629f2cb71cSBen Hutchings * temporarily. 6639f2cb71cSBen Hutchings */ 6649f2cb71cSBen Hutchings if (efx_channel_has_rx_queue(channel)) { 6659f2cb71cSBen Hutchings efx_stop_eventq(channel); 6669f2cb71cSBen Hutchings efx_start_eventq(channel); 6679f2cb71cSBen Hutchings } 668e42c3d85SBen Hutchings } 669874aeea5SJeff Kirsher 670e42c3d85SBen Hutchings rc = efx->type->fini_dmaq(efx); 671e42c3d85SBen Hutchings if (rc && EFX_WORKAROUND_7803(efx)) { 672e42c3d85SBen Hutchings /* Schedule a reset to recover from the flush failure. The 673e42c3d85SBen Hutchings * descriptor caches reference memory we're about to free, 674e42c3d85SBen Hutchings * but falcon_reconfigure_mac_wrapper() won't reconnect 675e42c3d85SBen Hutchings * the MACs because of the pending reset. 676e42c3d85SBen Hutchings */ 677e42c3d85SBen Hutchings netif_err(efx, drv, efx->net_dev, 678e42c3d85SBen Hutchings "Resetting to recover from flush failure\n"); 679e42c3d85SBen Hutchings efx_schedule_reset(efx, RESET_TYPE_ALL); 680e42c3d85SBen Hutchings } else if (rc) { 681e42c3d85SBen Hutchings netif_err(efx, drv, efx->net_dev, "failed to flush queues\n"); 682e42c3d85SBen Hutchings } else { 683e42c3d85SBen Hutchings netif_dbg(efx, drv, efx->net_dev, 684e42c3d85SBen Hutchings "successfully flushed all queues\n"); 685e42c3d85SBen Hutchings } 686e42c3d85SBen Hutchings 687e42c3d85SBen Hutchings efx_for_each_channel(channel, efx) { 688874aeea5SJeff Kirsher efx_for_each_channel_rx_queue(rx_queue, channel) 689874aeea5SJeff Kirsher efx_fini_rx_queue(rx_queue); 690874aeea5SJeff Kirsher efx_for_each_possible_channel_tx_queue(tx_queue, channel) 691874aeea5SJeff Kirsher efx_fini_tx_queue(tx_queue); 692874aeea5SJeff Kirsher } 693874aeea5SJeff Kirsher } 694874aeea5SJeff Kirsher 695874aeea5SJeff Kirsher static void efx_remove_channel(struct efx_channel *channel) 696874aeea5SJeff Kirsher { 697874aeea5SJeff Kirsher struct efx_tx_queue *tx_queue; 698874aeea5SJeff Kirsher struct efx_rx_queue *rx_queue; 699874aeea5SJeff Kirsher 700874aeea5SJeff Kirsher netif_dbg(channel->efx, drv, channel->efx->net_dev, 701874aeea5SJeff Kirsher "destroy chan %d\n", channel->channel); 702874aeea5SJeff Kirsher 703874aeea5SJeff Kirsher efx_for_each_channel_rx_queue(rx_queue, channel) 704874aeea5SJeff Kirsher efx_remove_rx_queue(rx_queue); 705874aeea5SJeff Kirsher efx_for_each_possible_channel_tx_queue(tx_queue, channel) 706874aeea5SJeff Kirsher efx_remove_tx_queue(tx_queue); 707874aeea5SJeff Kirsher efx_remove_eventq(channel); 708c31e5f9fSStuart Hodgson channel->type->post_remove(channel); 709874aeea5SJeff Kirsher } 710874aeea5SJeff Kirsher 711874aeea5SJeff Kirsher static void efx_remove_channels(struct efx_nic *efx) 712874aeea5SJeff Kirsher { 713874aeea5SJeff Kirsher struct efx_channel *channel; 714874aeea5SJeff Kirsher 715874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) 716874aeea5SJeff Kirsher efx_remove_channel(channel); 717874aeea5SJeff Kirsher } 718874aeea5SJeff Kirsher 719874aeea5SJeff Kirsher int 720874aeea5SJeff Kirsher efx_realloc_channels(struct efx_nic *efx, u32 rxq_entries, u32 txq_entries) 721874aeea5SJeff Kirsher { 722874aeea5SJeff Kirsher struct efx_channel *other_channel[EFX_MAX_CHANNELS], *channel; 723874aeea5SJeff Kirsher u32 old_rxq_entries, old_txq_entries; 7247f967c01SBen Hutchings unsigned i, next_buffer_table = 0; 7258b7325b4SBen Hutchings int rc; 7268b7325b4SBen Hutchings 7278b7325b4SBen Hutchings rc = efx_check_disabled(efx); 7288b7325b4SBen Hutchings if (rc) 7298b7325b4SBen Hutchings return rc; 7307f967c01SBen Hutchings 7317f967c01SBen Hutchings /* Not all channels should be reallocated. We must avoid 7327f967c01SBen Hutchings * reallocating their buffer table entries. 7337f967c01SBen Hutchings */ 7347f967c01SBen Hutchings efx_for_each_channel(channel, efx) { 7357f967c01SBen Hutchings struct efx_rx_queue *rx_queue; 7367f967c01SBen Hutchings struct efx_tx_queue *tx_queue; 7377f967c01SBen Hutchings 7387f967c01SBen Hutchings if (channel->type->copy) 7397f967c01SBen Hutchings continue; 7407f967c01SBen Hutchings next_buffer_table = max(next_buffer_table, 7417f967c01SBen Hutchings channel->eventq.index + 7427f967c01SBen Hutchings channel->eventq.entries); 7437f967c01SBen Hutchings efx_for_each_channel_rx_queue(rx_queue, channel) 7447f967c01SBen Hutchings next_buffer_table = max(next_buffer_table, 7457f967c01SBen Hutchings rx_queue->rxd.index + 7467f967c01SBen Hutchings rx_queue->rxd.entries); 7477f967c01SBen Hutchings efx_for_each_channel_tx_queue(tx_queue, channel) 7487f967c01SBen Hutchings next_buffer_table = max(next_buffer_table, 7497f967c01SBen Hutchings tx_queue->txd.index + 7507f967c01SBen Hutchings tx_queue->txd.entries); 7517f967c01SBen Hutchings } 752874aeea5SJeff Kirsher 75329c69a48SBen Hutchings efx_device_detach_sync(efx); 754874aeea5SJeff Kirsher efx_stop_all(efx); 755d8291187SBen Hutchings efx_soft_disable_interrupts(efx); 756874aeea5SJeff Kirsher 7577f967c01SBen Hutchings /* Clone channels (where possible) */ 758874aeea5SJeff Kirsher memset(other_channel, 0, sizeof(other_channel)); 759874aeea5SJeff Kirsher for (i = 0; i < efx->n_channels; i++) { 7607f967c01SBen Hutchings channel = efx->channel[i]; 7617f967c01SBen Hutchings if (channel->type->copy) 7627f967c01SBen Hutchings channel = channel->type->copy(channel); 763874aeea5SJeff Kirsher if (!channel) { 764874aeea5SJeff Kirsher rc = -ENOMEM; 765874aeea5SJeff Kirsher goto out; 766874aeea5SJeff Kirsher } 767874aeea5SJeff Kirsher other_channel[i] = channel; 768874aeea5SJeff Kirsher } 769874aeea5SJeff Kirsher 770874aeea5SJeff Kirsher /* Swap entry counts and channel pointers */ 771874aeea5SJeff Kirsher old_rxq_entries = efx->rxq_entries; 772874aeea5SJeff Kirsher old_txq_entries = efx->txq_entries; 773874aeea5SJeff Kirsher efx->rxq_entries = rxq_entries; 774874aeea5SJeff Kirsher efx->txq_entries = txq_entries; 775874aeea5SJeff Kirsher for (i = 0; i < efx->n_channels; i++) { 776874aeea5SJeff Kirsher channel = efx->channel[i]; 777874aeea5SJeff Kirsher efx->channel[i] = other_channel[i]; 778874aeea5SJeff Kirsher other_channel[i] = channel; 779874aeea5SJeff Kirsher } 780874aeea5SJeff Kirsher 7817f967c01SBen Hutchings /* Restart buffer table allocation */ 7827f967c01SBen Hutchings efx->next_buffer_table = next_buffer_table; 7837f967c01SBen Hutchings 7847f967c01SBen Hutchings for (i = 0; i < efx->n_channels; i++) { 7857f967c01SBen Hutchings channel = efx->channel[i]; 7867f967c01SBen Hutchings if (!channel->type->copy) 7877f967c01SBen Hutchings continue; 7887f967c01SBen Hutchings rc = efx_probe_channel(channel); 789874aeea5SJeff Kirsher if (rc) 790874aeea5SJeff Kirsher goto rollback; 7917f967c01SBen Hutchings efx_init_napi_channel(efx->channel[i]); 792874aeea5SJeff Kirsher } 793874aeea5SJeff Kirsher 7947f967c01SBen Hutchings out: 7957f967c01SBen Hutchings /* Destroy unused channel structures */ 7967f967c01SBen Hutchings for (i = 0; i < efx->n_channels; i++) { 7977f967c01SBen Hutchings channel = other_channel[i]; 7987f967c01SBen Hutchings if (channel && channel->type->copy) { 7997f967c01SBen Hutchings efx_fini_napi_channel(channel); 8007f967c01SBen Hutchings efx_remove_channel(channel); 8017f967c01SBen Hutchings kfree(channel); 8027f967c01SBen Hutchings } 8037f967c01SBen Hutchings } 8047f967c01SBen Hutchings 805d8291187SBen Hutchings efx_soft_enable_interrupts(efx); 806874aeea5SJeff Kirsher efx_start_all(efx); 80729c69a48SBen Hutchings netif_device_attach(efx->net_dev); 808874aeea5SJeff Kirsher return rc; 809874aeea5SJeff Kirsher 810874aeea5SJeff Kirsher rollback: 811874aeea5SJeff Kirsher /* Swap back */ 812874aeea5SJeff Kirsher efx->rxq_entries = old_rxq_entries; 813874aeea5SJeff Kirsher efx->txq_entries = old_txq_entries; 814874aeea5SJeff Kirsher for (i = 0; i < efx->n_channels; i++) { 815874aeea5SJeff Kirsher channel = efx->channel[i]; 816874aeea5SJeff Kirsher efx->channel[i] = other_channel[i]; 817874aeea5SJeff Kirsher other_channel[i] = channel; 818874aeea5SJeff Kirsher } 819874aeea5SJeff Kirsher goto out; 820874aeea5SJeff Kirsher } 821874aeea5SJeff Kirsher 822874aeea5SJeff Kirsher void efx_schedule_slow_fill(struct efx_rx_queue *rx_queue) 823874aeea5SJeff Kirsher { 824874aeea5SJeff Kirsher mod_timer(&rx_queue->slow_fill, jiffies + msecs_to_jiffies(100)); 825874aeea5SJeff Kirsher } 826874aeea5SJeff Kirsher 8277f967c01SBen Hutchings static const struct efx_channel_type efx_default_channel_type = { 8287f967c01SBen Hutchings .pre_probe = efx_channel_dummy_op_int, 829c31e5f9fSStuart Hodgson .post_remove = efx_channel_dummy_op_void, 8307f967c01SBen Hutchings .get_name = efx_get_channel_name, 8317f967c01SBen Hutchings .copy = efx_copy_channel, 8327f967c01SBen Hutchings .keep_eventq = false, 8337f967c01SBen Hutchings }; 8347f967c01SBen Hutchings 8357f967c01SBen Hutchings int efx_channel_dummy_op_int(struct efx_channel *channel) 8367f967c01SBen Hutchings { 8377f967c01SBen Hutchings return 0; 8387f967c01SBen Hutchings } 8397f967c01SBen Hutchings 840c31e5f9fSStuart Hodgson void efx_channel_dummy_op_void(struct efx_channel *channel) 841c31e5f9fSStuart Hodgson { 842c31e5f9fSStuart Hodgson } 843c31e5f9fSStuart Hodgson 844874aeea5SJeff Kirsher /************************************************************************** 845874aeea5SJeff Kirsher * 846874aeea5SJeff Kirsher * Port handling 847874aeea5SJeff Kirsher * 848874aeea5SJeff Kirsher **************************************************************************/ 849874aeea5SJeff Kirsher 850874aeea5SJeff Kirsher /* This ensures that the kernel is kept informed (via 851874aeea5SJeff Kirsher * netif_carrier_on/off) of the link status, and also maintains the 852874aeea5SJeff Kirsher * link status's stop on the port's TX queue. 853874aeea5SJeff Kirsher */ 854874aeea5SJeff Kirsher void efx_link_status_changed(struct efx_nic *efx) 855874aeea5SJeff Kirsher { 856874aeea5SJeff Kirsher struct efx_link_state *link_state = &efx->link_state; 857874aeea5SJeff Kirsher 858874aeea5SJeff Kirsher /* SFC Bug 5356: A net_dev notifier is registered, so we must ensure 859874aeea5SJeff Kirsher * that no events are triggered between unregister_netdev() and the 860874aeea5SJeff Kirsher * driver unloading. A more general condition is that NETDEV_CHANGE 861874aeea5SJeff Kirsher * can only be generated between NETDEV_UP and NETDEV_DOWN */ 862874aeea5SJeff Kirsher if (!netif_running(efx->net_dev)) 863874aeea5SJeff Kirsher return; 864874aeea5SJeff Kirsher 865874aeea5SJeff Kirsher if (link_state->up != netif_carrier_ok(efx->net_dev)) { 866874aeea5SJeff Kirsher efx->n_link_state_changes++; 867874aeea5SJeff Kirsher 868874aeea5SJeff Kirsher if (link_state->up) 869874aeea5SJeff Kirsher netif_carrier_on(efx->net_dev); 870874aeea5SJeff Kirsher else 871874aeea5SJeff Kirsher netif_carrier_off(efx->net_dev); 872874aeea5SJeff Kirsher } 873874aeea5SJeff Kirsher 874874aeea5SJeff Kirsher /* Status message for kernel log */ 8752aa9ef11SBen Hutchings if (link_state->up) 876874aeea5SJeff Kirsher netif_info(efx, link, efx->net_dev, 877964e6135SBen Hutchings "link up at %uMbps %s-duplex (MTU %d)\n", 878874aeea5SJeff Kirsher link_state->speed, link_state->fd ? "full" : "half", 879964e6135SBen Hutchings efx->net_dev->mtu); 8802aa9ef11SBen Hutchings else 881874aeea5SJeff Kirsher netif_info(efx, link, efx->net_dev, "link down\n"); 882874aeea5SJeff Kirsher } 883874aeea5SJeff Kirsher 884874aeea5SJeff Kirsher void efx_link_set_advertising(struct efx_nic *efx, u32 advertising) 885874aeea5SJeff Kirsher { 886874aeea5SJeff Kirsher efx->link_advertising = advertising; 887874aeea5SJeff Kirsher if (advertising) { 888874aeea5SJeff Kirsher if (advertising & ADVERTISED_Pause) 889874aeea5SJeff Kirsher efx->wanted_fc |= (EFX_FC_TX | EFX_FC_RX); 890874aeea5SJeff Kirsher else 891874aeea5SJeff Kirsher efx->wanted_fc &= ~(EFX_FC_TX | EFX_FC_RX); 892874aeea5SJeff Kirsher if (advertising & ADVERTISED_Asym_Pause) 893874aeea5SJeff Kirsher efx->wanted_fc ^= EFX_FC_TX; 894874aeea5SJeff Kirsher } 895874aeea5SJeff Kirsher } 896874aeea5SJeff Kirsher 897874aeea5SJeff Kirsher void efx_link_set_wanted_fc(struct efx_nic *efx, u8 wanted_fc) 898874aeea5SJeff Kirsher { 899874aeea5SJeff Kirsher efx->wanted_fc = wanted_fc; 900874aeea5SJeff Kirsher if (efx->link_advertising) { 901874aeea5SJeff Kirsher if (wanted_fc & EFX_FC_RX) 902874aeea5SJeff Kirsher efx->link_advertising |= (ADVERTISED_Pause | 903874aeea5SJeff Kirsher ADVERTISED_Asym_Pause); 904874aeea5SJeff Kirsher else 905874aeea5SJeff Kirsher efx->link_advertising &= ~(ADVERTISED_Pause | 906874aeea5SJeff Kirsher ADVERTISED_Asym_Pause); 907874aeea5SJeff Kirsher if (wanted_fc & EFX_FC_TX) 908874aeea5SJeff Kirsher efx->link_advertising ^= ADVERTISED_Asym_Pause; 909874aeea5SJeff Kirsher } 910874aeea5SJeff Kirsher } 911874aeea5SJeff Kirsher 912874aeea5SJeff Kirsher static void efx_fini_port(struct efx_nic *efx); 913874aeea5SJeff Kirsher 914874aeea5SJeff Kirsher /* Push loopback/power/transmit disable settings to the PHY, and reconfigure 915874aeea5SJeff Kirsher * the MAC appropriately. All other PHY configuration changes are pushed 916874aeea5SJeff Kirsher * through phy_op->set_settings(), and pushed asynchronously to the MAC 917874aeea5SJeff Kirsher * through efx_monitor(). 918874aeea5SJeff Kirsher * 919874aeea5SJeff Kirsher * Callers must hold the mac_lock 920874aeea5SJeff Kirsher */ 921874aeea5SJeff Kirsher int __efx_reconfigure_port(struct efx_nic *efx) 922874aeea5SJeff Kirsher { 923874aeea5SJeff Kirsher enum efx_phy_mode phy_mode; 924874aeea5SJeff Kirsher int rc; 925874aeea5SJeff Kirsher 926874aeea5SJeff Kirsher WARN_ON(!mutex_is_locked(&efx->mac_lock)); 927874aeea5SJeff Kirsher 928874aeea5SJeff Kirsher /* Disable PHY transmit in mac level loopbacks */ 929874aeea5SJeff Kirsher phy_mode = efx->phy_mode; 930874aeea5SJeff Kirsher if (LOOPBACK_INTERNAL(efx)) 931874aeea5SJeff Kirsher efx->phy_mode |= PHY_MODE_TX_DISABLED; 932874aeea5SJeff Kirsher else 933874aeea5SJeff Kirsher efx->phy_mode &= ~PHY_MODE_TX_DISABLED; 934874aeea5SJeff Kirsher 935874aeea5SJeff Kirsher rc = efx->type->reconfigure_port(efx); 936874aeea5SJeff Kirsher 937874aeea5SJeff Kirsher if (rc) 938874aeea5SJeff Kirsher efx->phy_mode = phy_mode; 939874aeea5SJeff Kirsher 940874aeea5SJeff Kirsher return rc; 941874aeea5SJeff Kirsher } 942874aeea5SJeff Kirsher 943874aeea5SJeff Kirsher /* Reinitialise the MAC to pick up new PHY settings, even if the port is 944874aeea5SJeff Kirsher * disabled. */ 945874aeea5SJeff Kirsher int efx_reconfigure_port(struct efx_nic *efx) 946874aeea5SJeff Kirsher { 947874aeea5SJeff Kirsher int rc; 948874aeea5SJeff Kirsher 949874aeea5SJeff Kirsher EFX_ASSERT_RESET_SERIALISED(efx); 950874aeea5SJeff Kirsher 951874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 952874aeea5SJeff Kirsher rc = __efx_reconfigure_port(efx); 953874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 954874aeea5SJeff Kirsher 955874aeea5SJeff Kirsher return rc; 956874aeea5SJeff Kirsher } 957874aeea5SJeff Kirsher 958874aeea5SJeff Kirsher /* Asynchronous work item for changing MAC promiscuity and multicast 959874aeea5SJeff Kirsher * hash. Avoid a drain/rx_ingress enable by reconfiguring the current 960874aeea5SJeff Kirsher * MAC directly. */ 961874aeea5SJeff Kirsher static void efx_mac_work(struct work_struct *data) 962874aeea5SJeff Kirsher { 963874aeea5SJeff Kirsher struct efx_nic *efx = container_of(data, struct efx_nic, mac_work); 964874aeea5SJeff Kirsher 965874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 96630b81cdaSBen Hutchings if (efx->port_enabled) 967710b208dSBen Hutchings efx->type->reconfigure_mac(efx); 968874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 969874aeea5SJeff Kirsher } 970874aeea5SJeff Kirsher 971874aeea5SJeff Kirsher static int efx_probe_port(struct efx_nic *efx) 972874aeea5SJeff Kirsher { 973874aeea5SJeff Kirsher int rc; 974874aeea5SJeff Kirsher 975874aeea5SJeff Kirsher netif_dbg(efx, probe, efx->net_dev, "create port\n"); 976874aeea5SJeff Kirsher 977874aeea5SJeff Kirsher if (phy_flash_cfg) 978874aeea5SJeff Kirsher efx->phy_mode = PHY_MODE_SPECIAL; 979874aeea5SJeff Kirsher 980874aeea5SJeff Kirsher /* Connect up MAC/PHY operations table */ 981874aeea5SJeff Kirsher rc = efx->type->probe_port(efx); 982874aeea5SJeff Kirsher if (rc) 983874aeea5SJeff Kirsher return rc; 984874aeea5SJeff Kirsher 985e332bcb3SBen Hutchings /* Initialise MAC address to permanent address */ 986e332bcb3SBen Hutchings memcpy(efx->net_dev->dev_addr, efx->net_dev->perm_addr, ETH_ALEN); 987874aeea5SJeff Kirsher 988874aeea5SJeff Kirsher return 0; 989874aeea5SJeff Kirsher } 990874aeea5SJeff Kirsher 991874aeea5SJeff Kirsher static int efx_init_port(struct efx_nic *efx) 992874aeea5SJeff Kirsher { 993874aeea5SJeff Kirsher int rc; 994874aeea5SJeff Kirsher 995874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "init port\n"); 996874aeea5SJeff Kirsher 997874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 998874aeea5SJeff Kirsher 999874aeea5SJeff Kirsher rc = efx->phy_op->init(efx); 1000874aeea5SJeff Kirsher if (rc) 1001874aeea5SJeff Kirsher goto fail1; 1002874aeea5SJeff Kirsher 1003874aeea5SJeff Kirsher efx->port_initialized = true; 1004874aeea5SJeff Kirsher 1005874aeea5SJeff Kirsher /* Reconfigure the MAC before creating dma queues (required for 1006874aeea5SJeff Kirsher * Falcon/A1 where RX_INGR_EN/TX_DRAIN_EN isn't supported) */ 1007710b208dSBen Hutchings efx->type->reconfigure_mac(efx); 1008874aeea5SJeff Kirsher 1009874aeea5SJeff Kirsher /* Ensure the PHY advertises the correct flow control settings */ 1010874aeea5SJeff Kirsher rc = efx->phy_op->reconfigure(efx); 1011874aeea5SJeff Kirsher if (rc) 1012874aeea5SJeff Kirsher goto fail2; 1013874aeea5SJeff Kirsher 1014874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 1015874aeea5SJeff Kirsher return 0; 1016874aeea5SJeff Kirsher 1017874aeea5SJeff Kirsher fail2: 1018874aeea5SJeff Kirsher efx->phy_op->fini(efx); 1019874aeea5SJeff Kirsher fail1: 1020874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 1021874aeea5SJeff Kirsher return rc; 1022874aeea5SJeff Kirsher } 1023874aeea5SJeff Kirsher 1024874aeea5SJeff Kirsher static void efx_start_port(struct efx_nic *efx) 1025874aeea5SJeff Kirsher { 1026874aeea5SJeff Kirsher netif_dbg(efx, ifup, efx->net_dev, "start port\n"); 1027874aeea5SJeff Kirsher BUG_ON(efx->port_enabled); 1028874aeea5SJeff Kirsher 1029874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 1030874aeea5SJeff Kirsher efx->port_enabled = true; 1031874aeea5SJeff Kirsher 1032874aeea5SJeff Kirsher /* efx_mac_work() might have been scheduled after efx_stop_port(), 1033874aeea5SJeff Kirsher * and then cancelled by efx_flush_all() */ 1034710b208dSBen Hutchings efx->type->reconfigure_mac(efx); 1035874aeea5SJeff Kirsher 1036874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 1037874aeea5SJeff Kirsher } 1038874aeea5SJeff Kirsher 1039874aeea5SJeff Kirsher /* Prevent efx_mac_work() and efx_monitor() from working */ 1040874aeea5SJeff Kirsher static void efx_stop_port(struct efx_nic *efx) 1041874aeea5SJeff Kirsher { 1042874aeea5SJeff Kirsher netif_dbg(efx, ifdown, efx->net_dev, "stop port\n"); 1043874aeea5SJeff Kirsher 1044874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 1045874aeea5SJeff Kirsher efx->port_enabled = false; 1046874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 1047874aeea5SJeff Kirsher 1048874aeea5SJeff Kirsher /* Serialise against efx_set_multicast_list() */ 1049874aeea5SJeff Kirsher netif_addr_lock_bh(efx->net_dev); 1050874aeea5SJeff Kirsher netif_addr_unlock_bh(efx->net_dev); 1051874aeea5SJeff Kirsher } 1052874aeea5SJeff Kirsher 1053874aeea5SJeff Kirsher static void efx_fini_port(struct efx_nic *efx) 1054874aeea5SJeff Kirsher { 1055874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "shut down port\n"); 1056874aeea5SJeff Kirsher 1057874aeea5SJeff Kirsher if (!efx->port_initialized) 1058874aeea5SJeff Kirsher return; 1059874aeea5SJeff Kirsher 1060874aeea5SJeff Kirsher efx->phy_op->fini(efx); 1061874aeea5SJeff Kirsher efx->port_initialized = false; 1062874aeea5SJeff Kirsher 1063874aeea5SJeff Kirsher efx->link_state.up = false; 1064874aeea5SJeff Kirsher efx_link_status_changed(efx); 1065874aeea5SJeff Kirsher } 1066874aeea5SJeff Kirsher 1067874aeea5SJeff Kirsher static void efx_remove_port(struct efx_nic *efx) 1068874aeea5SJeff Kirsher { 1069874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "destroying port\n"); 1070874aeea5SJeff Kirsher 1071874aeea5SJeff Kirsher efx->type->remove_port(efx); 1072874aeea5SJeff Kirsher } 1073874aeea5SJeff Kirsher 1074874aeea5SJeff Kirsher /************************************************************************** 1075874aeea5SJeff Kirsher * 1076874aeea5SJeff Kirsher * NIC handling 1077874aeea5SJeff Kirsher * 1078874aeea5SJeff Kirsher **************************************************************************/ 1079874aeea5SJeff Kirsher 1080874aeea5SJeff Kirsher /* This configures the PCI device to enable I/O and DMA. */ 1081874aeea5SJeff Kirsher static int efx_init_io(struct efx_nic *efx) 1082874aeea5SJeff Kirsher { 1083874aeea5SJeff Kirsher struct pci_dev *pci_dev = efx->pci_dev; 1084874aeea5SJeff Kirsher dma_addr_t dma_mask = efx->type->max_dma_mask; 1085b105798fSBen Hutchings unsigned int mem_map_size = efx->type->mem_map_size(efx); 1086874aeea5SJeff Kirsher int rc; 1087874aeea5SJeff Kirsher 1088874aeea5SJeff Kirsher netif_dbg(efx, probe, efx->net_dev, "initialising I/O\n"); 1089874aeea5SJeff Kirsher 1090874aeea5SJeff Kirsher rc = pci_enable_device(pci_dev); 1091874aeea5SJeff Kirsher if (rc) { 1092874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 1093874aeea5SJeff Kirsher "failed to enable PCI device\n"); 1094874aeea5SJeff Kirsher goto fail1; 1095874aeea5SJeff Kirsher } 1096874aeea5SJeff Kirsher 1097874aeea5SJeff Kirsher pci_set_master(pci_dev); 1098874aeea5SJeff Kirsher 1099874aeea5SJeff Kirsher /* Set the PCI DMA mask. Try all possibilities from our 1100874aeea5SJeff Kirsher * genuine mask down to 32 bits, because some architectures 1101874aeea5SJeff Kirsher * (e.g. x86_64 with iommu_sac_force set) will allow 40 bit 1102874aeea5SJeff Kirsher * masks event though they reject 46 bit masks. 1103874aeea5SJeff Kirsher */ 1104874aeea5SJeff Kirsher while (dma_mask > 0x7fffffffUL) { 11050e33d870SBen Hutchings if (dma_supported(&pci_dev->dev, dma_mask)) { 11060e33d870SBen Hutchings rc = dma_set_mask(&pci_dev->dev, dma_mask); 1107e9e01846SBen Hutchings if (rc == 0) 1108874aeea5SJeff Kirsher break; 1109e9e01846SBen Hutchings } 1110874aeea5SJeff Kirsher dma_mask >>= 1; 1111874aeea5SJeff Kirsher } 1112874aeea5SJeff Kirsher if (rc) { 1113874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 1114874aeea5SJeff Kirsher "could not find a suitable DMA mask\n"); 1115874aeea5SJeff Kirsher goto fail2; 1116874aeea5SJeff Kirsher } 1117874aeea5SJeff Kirsher netif_dbg(efx, probe, efx->net_dev, 1118874aeea5SJeff Kirsher "using DMA mask %llx\n", (unsigned long long) dma_mask); 11190e33d870SBen Hutchings rc = dma_set_coherent_mask(&pci_dev->dev, dma_mask); 1120874aeea5SJeff Kirsher if (rc) { 11210e33d870SBen Hutchings /* dma_set_coherent_mask() is not *allowed* to 11220e33d870SBen Hutchings * fail with a mask that dma_set_mask() accepted, 1123874aeea5SJeff Kirsher * but just in case... 1124874aeea5SJeff Kirsher */ 1125874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 1126874aeea5SJeff Kirsher "failed to set consistent DMA mask\n"); 1127874aeea5SJeff Kirsher goto fail2; 1128874aeea5SJeff Kirsher } 1129874aeea5SJeff Kirsher 1130874aeea5SJeff Kirsher efx->membase_phys = pci_resource_start(efx->pci_dev, EFX_MEM_BAR); 1131874aeea5SJeff Kirsher rc = pci_request_region(pci_dev, EFX_MEM_BAR, "sfc"); 1132874aeea5SJeff Kirsher if (rc) { 1133874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 1134874aeea5SJeff Kirsher "request for memory BAR failed\n"); 1135874aeea5SJeff Kirsher rc = -EIO; 1136874aeea5SJeff Kirsher goto fail3; 1137874aeea5SJeff Kirsher } 1138b105798fSBen Hutchings efx->membase = ioremap_nocache(efx->membase_phys, mem_map_size); 1139874aeea5SJeff Kirsher if (!efx->membase) { 1140874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 1141874aeea5SJeff Kirsher "could not map memory BAR at %llx+%x\n", 1142b105798fSBen Hutchings (unsigned long long)efx->membase_phys, mem_map_size); 1143874aeea5SJeff Kirsher rc = -ENOMEM; 1144874aeea5SJeff Kirsher goto fail4; 1145874aeea5SJeff Kirsher } 1146874aeea5SJeff Kirsher netif_dbg(efx, probe, efx->net_dev, 1147874aeea5SJeff Kirsher "memory BAR at %llx+%x (virtual %p)\n", 1148b105798fSBen Hutchings (unsigned long long)efx->membase_phys, mem_map_size, 1149b105798fSBen Hutchings efx->membase); 1150874aeea5SJeff Kirsher 1151874aeea5SJeff Kirsher return 0; 1152874aeea5SJeff Kirsher 1153874aeea5SJeff Kirsher fail4: 1154874aeea5SJeff Kirsher pci_release_region(efx->pci_dev, EFX_MEM_BAR); 1155874aeea5SJeff Kirsher fail3: 1156874aeea5SJeff Kirsher efx->membase_phys = 0; 1157874aeea5SJeff Kirsher fail2: 1158874aeea5SJeff Kirsher pci_disable_device(efx->pci_dev); 1159874aeea5SJeff Kirsher fail1: 1160874aeea5SJeff Kirsher return rc; 1161874aeea5SJeff Kirsher } 1162874aeea5SJeff Kirsher 1163874aeea5SJeff Kirsher static void efx_fini_io(struct efx_nic *efx) 1164874aeea5SJeff Kirsher { 1165874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "shutting down I/O\n"); 1166874aeea5SJeff Kirsher 1167874aeea5SJeff Kirsher if (efx->membase) { 1168874aeea5SJeff Kirsher iounmap(efx->membase); 1169874aeea5SJeff Kirsher efx->membase = NULL; 1170874aeea5SJeff Kirsher } 1171874aeea5SJeff Kirsher 1172874aeea5SJeff Kirsher if (efx->membase_phys) { 1173874aeea5SJeff Kirsher pci_release_region(efx->pci_dev, EFX_MEM_BAR); 1174874aeea5SJeff Kirsher efx->membase_phys = 0; 1175874aeea5SJeff Kirsher } 1176874aeea5SJeff Kirsher 1177874aeea5SJeff Kirsher pci_disable_device(efx->pci_dev); 1178874aeea5SJeff Kirsher } 1179874aeea5SJeff Kirsher 1180a9a52506SBen Hutchings static unsigned int efx_wanted_parallelism(struct efx_nic *efx) 1181874aeea5SJeff Kirsher { 1182cdb08f8fSBen Hutchings cpumask_var_t thread_mask; 1183a16e5b24SBen Hutchings unsigned int count; 1184874aeea5SJeff Kirsher int cpu; 1185874aeea5SJeff Kirsher 1186cd2d5b52SBen Hutchings if (rss_cpus) { 1187cd2d5b52SBen Hutchings count = rss_cpus; 1188cd2d5b52SBen Hutchings } else { 1189cdb08f8fSBen Hutchings if (unlikely(!zalloc_cpumask_var(&thread_mask, GFP_KERNEL))) { 1190a9a52506SBen Hutchings netif_warn(efx, probe, efx->net_dev, 1191a9a52506SBen Hutchings "RSS disabled due to allocation failure\n"); 1192874aeea5SJeff Kirsher return 1; 1193874aeea5SJeff Kirsher } 1194874aeea5SJeff Kirsher 1195874aeea5SJeff Kirsher count = 0; 1196874aeea5SJeff Kirsher for_each_online_cpu(cpu) { 1197cdb08f8fSBen Hutchings if (!cpumask_test_cpu(cpu, thread_mask)) { 1198874aeea5SJeff Kirsher ++count; 1199cdb08f8fSBen Hutchings cpumask_or(thread_mask, thread_mask, 1200cdb08f8fSBen Hutchings topology_thread_cpumask(cpu)); 1201874aeea5SJeff Kirsher } 1202874aeea5SJeff Kirsher } 1203874aeea5SJeff Kirsher 1204cdb08f8fSBen Hutchings free_cpumask_var(thread_mask); 1205cd2d5b52SBen Hutchings } 1206cd2d5b52SBen Hutchings 1207cd2d5b52SBen Hutchings /* If RSS is requested for the PF *and* VFs then we can't write RSS 1208cd2d5b52SBen Hutchings * table entries that are inaccessible to VFs 1209cd2d5b52SBen Hutchings */ 1210cd2d5b52SBen Hutchings if (efx_sriov_wanted(efx) && efx_vf_size(efx) > 1 && 1211cd2d5b52SBen Hutchings count > efx_vf_size(efx)) { 1212cd2d5b52SBen Hutchings netif_warn(efx, probe, efx->net_dev, 1213cd2d5b52SBen Hutchings "Reducing number of RSS channels from %u to %u for " 1214cd2d5b52SBen Hutchings "VF support. Increase vf-msix-limit to use more " 1215cd2d5b52SBen Hutchings "channels on the PF.\n", 1216cd2d5b52SBen Hutchings count, efx_vf_size(efx)); 1217cd2d5b52SBen Hutchings count = efx_vf_size(efx); 1218cd2d5b52SBen Hutchings } 1219cd2d5b52SBen Hutchings 1220874aeea5SJeff Kirsher return count; 1221874aeea5SJeff Kirsher } 1222874aeea5SJeff Kirsher 1223874aeea5SJeff Kirsher /* Probe the number and type of interrupts we are able to obtain, and 1224874aeea5SJeff Kirsher * the resulting numbers of channels and RX queues. 1225874aeea5SJeff Kirsher */ 1226874aeea5SJeff Kirsher static int efx_probe_interrupts(struct efx_nic *efx) 1227874aeea5SJeff Kirsher { 12287f967c01SBen Hutchings unsigned int extra_channels = 0; 12297f967c01SBen Hutchings unsigned int i, j; 1230a16e5b24SBen Hutchings int rc; 1231874aeea5SJeff Kirsher 12327f967c01SBen Hutchings for (i = 0; i < EFX_MAX_EXTRA_CHANNELS; i++) 12337f967c01SBen Hutchings if (efx->extra_channel_type[i]) 12347f967c01SBen Hutchings ++extra_channels; 12357f967c01SBen Hutchings 1236874aeea5SJeff Kirsher if (efx->interrupt_mode == EFX_INT_MODE_MSIX) { 1237874aeea5SJeff Kirsher struct msix_entry xentries[EFX_MAX_CHANNELS]; 1238a16e5b24SBen Hutchings unsigned int n_channels; 1239874aeea5SJeff Kirsher 1240a9a52506SBen Hutchings n_channels = efx_wanted_parallelism(efx); 1241874aeea5SJeff Kirsher if (separate_tx_channels) 1242874aeea5SJeff Kirsher n_channels *= 2; 12437f967c01SBen Hutchings n_channels += extra_channels; 1244b105798fSBen Hutchings n_channels = min(n_channels, efx->max_channels); 1245874aeea5SJeff Kirsher 1246874aeea5SJeff Kirsher for (i = 0; i < n_channels; i++) 1247874aeea5SJeff Kirsher xentries[i].entry = i; 1248874aeea5SJeff Kirsher rc = pci_enable_msix(efx->pci_dev, xentries, n_channels); 1249874aeea5SJeff Kirsher if (rc > 0) { 1250874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, 1251874aeea5SJeff Kirsher "WARNING: Insufficient MSI-X vectors" 1252a16e5b24SBen Hutchings " available (%d < %u).\n", rc, n_channels); 1253874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, 1254874aeea5SJeff Kirsher "WARNING: Performance may be reduced.\n"); 1255874aeea5SJeff Kirsher EFX_BUG_ON_PARANOID(rc >= n_channels); 1256874aeea5SJeff Kirsher n_channels = rc; 1257874aeea5SJeff Kirsher rc = pci_enable_msix(efx->pci_dev, xentries, 1258874aeea5SJeff Kirsher n_channels); 1259874aeea5SJeff Kirsher } 1260874aeea5SJeff Kirsher 1261874aeea5SJeff Kirsher if (rc == 0) { 1262874aeea5SJeff Kirsher efx->n_channels = n_channels; 12637f967c01SBen Hutchings if (n_channels > extra_channels) 12647f967c01SBen Hutchings n_channels -= extra_channels; 1265874aeea5SJeff Kirsher if (separate_tx_channels) { 12667f967c01SBen Hutchings efx->n_tx_channels = max(n_channels / 2, 1U); 12677f967c01SBen Hutchings efx->n_rx_channels = max(n_channels - 12687f967c01SBen Hutchings efx->n_tx_channels, 12697f967c01SBen Hutchings 1U); 1270874aeea5SJeff Kirsher } else { 12717f967c01SBen Hutchings efx->n_tx_channels = n_channels; 12727f967c01SBen Hutchings efx->n_rx_channels = n_channels; 1273874aeea5SJeff Kirsher } 12747f967c01SBen Hutchings for (i = 0; i < efx->n_channels; i++) 1275874aeea5SJeff Kirsher efx_get_channel(efx, i)->irq = 1276874aeea5SJeff Kirsher xentries[i].vector; 1277874aeea5SJeff Kirsher } else { 1278874aeea5SJeff Kirsher /* Fall back to single channel MSI */ 1279874aeea5SJeff Kirsher efx->interrupt_mode = EFX_INT_MODE_MSI; 1280874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, 1281874aeea5SJeff Kirsher "could not enable MSI-X\n"); 1282874aeea5SJeff Kirsher } 1283874aeea5SJeff Kirsher } 1284874aeea5SJeff Kirsher 1285874aeea5SJeff Kirsher /* Try single interrupt MSI */ 1286874aeea5SJeff Kirsher if (efx->interrupt_mode == EFX_INT_MODE_MSI) { 1287874aeea5SJeff Kirsher efx->n_channels = 1; 1288874aeea5SJeff Kirsher efx->n_rx_channels = 1; 1289874aeea5SJeff Kirsher efx->n_tx_channels = 1; 1290874aeea5SJeff Kirsher rc = pci_enable_msi(efx->pci_dev); 1291874aeea5SJeff Kirsher if (rc == 0) { 1292874aeea5SJeff Kirsher efx_get_channel(efx, 0)->irq = efx->pci_dev->irq; 1293874aeea5SJeff Kirsher } else { 1294874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, 1295874aeea5SJeff Kirsher "could not enable MSI\n"); 1296874aeea5SJeff Kirsher efx->interrupt_mode = EFX_INT_MODE_LEGACY; 1297874aeea5SJeff Kirsher } 1298874aeea5SJeff Kirsher } 1299874aeea5SJeff Kirsher 1300874aeea5SJeff Kirsher /* Assume legacy interrupts */ 1301874aeea5SJeff Kirsher if (efx->interrupt_mode == EFX_INT_MODE_LEGACY) { 1302874aeea5SJeff Kirsher efx->n_channels = 1 + (separate_tx_channels ? 1 : 0); 1303874aeea5SJeff Kirsher efx->n_rx_channels = 1; 1304874aeea5SJeff Kirsher efx->n_tx_channels = 1; 1305874aeea5SJeff Kirsher efx->legacy_irq = efx->pci_dev->irq; 1306874aeea5SJeff Kirsher } 1307874aeea5SJeff Kirsher 13087f967c01SBen Hutchings /* Assign extra channels if possible */ 13097f967c01SBen Hutchings j = efx->n_channels; 13107f967c01SBen Hutchings for (i = 0; i < EFX_MAX_EXTRA_CHANNELS; i++) { 13117f967c01SBen Hutchings if (!efx->extra_channel_type[i]) 13127f967c01SBen Hutchings continue; 13137f967c01SBen Hutchings if (efx->interrupt_mode != EFX_INT_MODE_MSIX || 13147f967c01SBen Hutchings efx->n_channels <= extra_channels) { 13157f967c01SBen Hutchings efx->extra_channel_type[i]->handle_no_channel(efx); 13167f967c01SBen Hutchings } else { 13177f967c01SBen Hutchings --j; 13187f967c01SBen Hutchings efx_get_channel(efx, j)->type = 13197f967c01SBen Hutchings efx->extra_channel_type[i]; 13207f967c01SBen Hutchings } 13217f967c01SBen Hutchings } 13227f967c01SBen Hutchings 1323cd2d5b52SBen Hutchings /* RSS might be usable on VFs even if it is disabled on the PF */ 13243132d282SBen Hutchings efx->rss_spread = ((efx->n_rx_channels > 1 || !efx_sriov_wanted(efx)) ? 1325cd2d5b52SBen Hutchings efx->n_rx_channels : efx_vf_size(efx)); 1326cd2d5b52SBen Hutchings 1327874aeea5SJeff Kirsher return 0; 1328874aeea5SJeff Kirsher } 1329874aeea5SJeff Kirsher 1330d8291187SBen Hutchings static void efx_soft_enable_interrupts(struct efx_nic *efx) 1331d8291187SBen Hutchings { 1332d8291187SBen Hutchings struct efx_channel *channel; 1333d8291187SBen Hutchings 1334d8291187SBen Hutchings BUG_ON(efx->state == STATE_DISABLED); 1335d8291187SBen Hutchings 1336d8291187SBen Hutchings efx->irq_soft_enabled = true; 1337d8291187SBen Hutchings smp_wmb(); 1338d8291187SBen Hutchings 1339d8291187SBen Hutchings efx_for_each_channel(channel, efx) { 1340d8291187SBen Hutchings if (!channel->type->keep_eventq) 1341d8291187SBen Hutchings efx_init_eventq(channel); 1342d8291187SBen Hutchings efx_start_eventq(channel); 1343d8291187SBen Hutchings } 1344d8291187SBen Hutchings 1345d8291187SBen Hutchings efx_mcdi_mode_event(efx); 1346d8291187SBen Hutchings } 1347d8291187SBen Hutchings 1348d8291187SBen Hutchings static void efx_soft_disable_interrupts(struct efx_nic *efx) 1349d8291187SBen Hutchings { 1350d8291187SBen Hutchings struct efx_channel *channel; 1351d8291187SBen Hutchings 1352d8291187SBen Hutchings if (efx->state == STATE_DISABLED) 1353d8291187SBen Hutchings return; 1354d8291187SBen Hutchings 1355d8291187SBen Hutchings efx_mcdi_mode_poll(efx); 1356d8291187SBen Hutchings 1357d8291187SBen Hutchings efx->irq_soft_enabled = false; 1358d8291187SBen Hutchings smp_wmb(); 1359d8291187SBen Hutchings 1360d8291187SBen Hutchings if (efx->legacy_irq) 1361d8291187SBen Hutchings synchronize_irq(efx->legacy_irq); 1362d8291187SBen Hutchings 1363d8291187SBen Hutchings efx_for_each_channel(channel, efx) { 1364d8291187SBen Hutchings if (channel->irq) 1365d8291187SBen Hutchings synchronize_irq(channel->irq); 1366d8291187SBen Hutchings 1367d8291187SBen Hutchings efx_stop_eventq(channel); 1368d8291187SBen Hutchings if (!channel->type->keep_eventq) 1369d8291187SBen Hutchings efx_fini_eventq(channel); 1370d8291187SBen Hutchings } 1371cade715fSBen Hutchings 1372cade715fSBen Hutchings /* Flush the asynchronous MCDI request queue */ 1373cade715fSBen Hutchings efx_mcdi_flush_async(efx); 1374d8291187SBen Hutchings } 1375d8291187SBen Hutchings 1376d8291187SBen Hutchings static void efx_enable_interrupts(struct efx_nic *efx) 13779f2cb71cSBen Hutchings { 13789f2cb71cSBen Hutchings struct efx_channel *channel; 13799f2cb71cSBen Hutchings 13808b7325b4SBen Hutchings BUG_ON(efx->state == STATE_DISABLED); 13818b7325b4SBen Hutchings 1382b28405b0SAlexandre Rames if (efx->eeh_disabled_legacy_irq) { 1383b28405b0SAlexandre Rames enable_irq(efx->legacy_irq); 1384b28405b0SAlexandre Rames efx->eeh_disabled_legacy_irq = false; 1385b28405b0SAlexandre Rames } 1386d8291187SBen Hutchings 138786094f7fSBen Hutchings efx->type->irq_enable_master(efx); 13889f2cb71cSBen Hutchings 13899f2cb71cSBen Hutchings efx_for_each_channel(channel, efx) { 1390d8291187SBen Hutchings if (channel->type->keep_eventq) 13919f2cb71cSBen Hutchings efx_init_eventq(channel); 13929f2cb71cSBen Hutchings } 13939f2cb71cSBen Hutchings 1394d8291187SBen Hutchings efx_soft_enable_interrupts(efx); 13959f2cb71cSBen Hutchings } 13969f2cb71cSBen Hutchings 1397d8291187SBen Hutchings static void efx_disable_interrupts(struct efx_nic *efx) 13989f2cb71cSBen Hutchings { 13999f2cb71cSBen Hutchings struct efx_channel *channel; 14009f2cb71cSBen Hutchings 1401d8291187SBen Hutchings efx_soft_disable_interrupts(efx); 14029f2cb71cSBen Hutchings 14039f2cb71cSBen Hutchings efx_for_each_channel(channel, efx) { 1404d8291187SBen Hutchings if (channel->type->keep_eventq) 14059f2cb71cSBen Hutchings efx_fini_eventq(channel); 14069f2cb71cSBen Hutchings } 1407d8291187SBen Hutchings 140886094f7fSBen Hutchings efx->type->irq_disable_non_ev(efx); 14099f2cb71cSBen Hutchings } 14109f2cb71cSBen Hutchings 1411874aeea5SJeff Kirsher static void efx_remove_interrupts(struct efx_nic *efx) 1412874aeea5SJeff Kirsher { 1413874aeea5SJeff Kirsher struct efx_channel *channel; 1414874aeea5SJeff Kirsher 1415874aeea5SJeff Kirsher /* Remove MSI/MSI-X interrupts */ 1416874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) 1417874aeea5SJeff Kirsher channel->irq = 0; 1418874aeea5SJeff Kirsher pci_disable_msi(efx->pci_dev); 1419874aeea5SJeff Kirsher pci_disable_msix(efx->pci_dev); 1420874aeea5SJeff Kirsher 1421874aeea5SJeff Kirsher /* Remove legacy interrupt */ 1422874aeea5SJeff Kirsher efx->legacy_irq = 0; 1423874aeea5SJeff Kirsher } 1424874aeea5SJeff Kirsher 1425874aeea5SJeff Kirsher static void efx_set_channels(struct efx_nic *efx) 1426874aeea5SJeff Kirsher { 1427874aeea5SJeff Kirsher struct efx_channel *channel; 1428874aeea5SJeff Kirsher struct efx_tx_queue *tx_queue; 1429874aeea5SJeff Kirsher 1430874aeea5SJeff Kirsher efx->tx_channel_offset = 1431874aeea5SJeff Kirsher separate_tx_channels ? efx->n_channels - efx->n_tx_channels : 0; 1432874aeea5SJeff Kirsher 143379d68b37SStuart Hodgson /* We need to mark which channels really have RX and TX 143479d68b37SStuart Hodgson * queues, and adjust the TX queue numbers if we have separate 1435874aeea5SJeff Kirsher * RX-only and TX-only channels. 1436874aeea5SJeff Kirsher */ 1437874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) { 143879d68b37SStuart Hodgson if (channel->channel < efx->n_rx_channels) 143979d68b37SStuart Hodgson channel->rx_queue.core_index = channel->channel; 144079d68b37SStuart Hodgson else 144179d68b37SStuart Hodgson channel->rx_queue.core_index = -1; 144279d68b37SStuart Hodgson 1443874aeea5SJeff Kirsher efx_for_each_channel_tx_queue(tx_queue, channel) 1444874aeea5SJeff Kirsher tx_queue->queue -= (efx->tx_channel_offset * 1445874aeea5SJeff Kirsher EFX_TXQ_TYPES); 1446874aeea5SJeff Kirsher } 1447874aeea5SJeff Kirsher } 1448874aeea5SJeff Kirsher 1449874aeea5SJeff Kirsher static int efx_probe_nic(struct efx_nic *efx) 1450874aeea5SJeff Kirsher { 1451874aeea5SJeff Kirsher size_t i; 1452874aeea5SJeff Kirsher int rc; 1453874aeea5SJeff Kirsher 1454874aeea5SJeff Kirsher netif_dbg(efx, probe, efx->net_dev, "creating NIC\n"); 1455874aeea5SJeff Kirsher 1456874aeea5SJeff Kirsher /* Carry out hardware-type specific initialisation */ 1457874aeea5SJeff Kirsher rc = efx->type->probe(efx); 1458874aeea5SJeff Kirsher if (rc) 1459874aeea5SJeff Kirsher return rc; 1460874aeea5SJeff Kirsher 1461874aeea5SJeff Kirsher /* Determine the number of channels and queues by trying to hook 1462874aeea5SJeff Kirsher * in MSI-X interrupts. */ 1463874aeea5SJeff Kirsher rc = efx_probe_interrupts(efx); 1464874aeea5SJeff Kirsher if (rc) 1465874aeea5SJeff Kirsher goto fail; 1466874aeea5SJeff Kirsher 146728e47c49SBen Hutchings efx->type->dimension_resources(efx); 146828e47c49SBen Hutchings 1469874aeea5SJeff Kirsher if (efx->n_channels > 1) 1470874aeea5SJeff Kirsher get_random_bytes(&efx->rx_hash_key, sizeof(efx->rx_hash_key)); 1471874aeea5SJeff Kirsher for (i = 0; i < ARRAY_SIZE(efx->rx_indir_table); i++) 1472278bc429SBen Hutchings efx->rx_indir_table[i] = 1473cd2d5b52SBen Hutchings ethtool_rxfh_indir_default(i, efx->rss_spread); 1474874aeea5SJeff Kirsher 1475874aeea5SJeff Kirsher efx_set_channels(efx); 1476874aeea5SJeff Kirsher netif_set_real_num_tx_queues(efx->net_dev, efx->n_tx_channels); 1477874aeea5SJeff Kirsher netif_set_real_num_rx_queues(efx->net_dev, efx->n_rx_channels); 1478874aeea5SJeff Kirsher 1479874aeea5SJeff Kirsher /* Initialise the interrupt moderation settings */ 14809e393b30SBen Hutchings efx_init_irq_moderation(efx, tx_irq_mod_usec, rx_irq_mod_usec, true, 14819e393b30SBen Hutchings true); 1482874aeea5SJeff Kirsher 1483874aeea5SJeff Kirsher return 0; 1484874aeea5SJeff Kirsher 1485874aeea5SJeff Kirsher fail: 1486874aeea5SJeff Kirsher efx->type->remove(efx); 1487874aeea5SJeff Kirsher return rc; 1488874aeea5SJeff Kirsher } 1489874aeea5SJeff Kirsher 1490874aeea5SJeff Kirsher static void efx_remove_nic(struct efx_nic *efx) 1491874aeea5SJeff Kirsher { 1492874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "destroying NIC\n"); 1493874aeea5SJeff Kirsher 1494874aeea5SJeff Kirsher efx_remove_interrupts(efx); 1495874aeea5SJeff Kirsher efx->type->remove(efx); 1496874aeea5SJeff Kirsher } 1497874aeea5SJeff Kirsher 1498add72477SBen Hutchings static int efx_probe_filters(struct efx_nic *efx) 1499add72477SBen Hutchings { 1500add72477SBen Hutchings int rc; 1501add72477SBen Hutchings 1502add72477SBen Hutchings spin_lock_init(&efx->filter_lock); 1503add72477SBen Hutchings 1504add72477SBen Hutchings rc = efx->type->filter_table_probe(efx); 1505add72477SBen Hutchings if (rc) 1506add72477SBen Hutchings return rc; 1507add72477SBen Hutchings 1508add72477SBen Hutchings #ifdef CONFIG_RFS_ACCEL 1509add72477SBen Hutchings if (efx->type->offload_features & NETIF_F_NTUPLE) { 1510add72477SBen Hutchings efx->rps_flow_id = kcalloc(efx->type->max_rx_ip_filters, 1511add72477SBen Hutchings sizeof(*efx->rps_flow_id), 1512add72477SBen Hutchings GFP_KERNEL); 1513add72477SBen Hutchings if (!efx->rps_flow_id) { 1514add72477SBen Hutchings efx->type->filter_table_remove(efx); 1515add72477SBen Hutchings return -ENOMEM; 1516add72477SBen Hutchings } 1517add72477SBen Hutchings } 1518add72477SBen Hutchings #endif 1519add72477SBen Hutchings 1520add72477SBen Hutchings return 0; 1521add72477SBen Hutchings } 1522add72477SBen Hutchings 1523add72477SBen Hutchings static void efx_remove_filters(struct efx_nic *efx) 1524add72477SBen Hutchings { 1525add72477SBen Hutchings #ifdef CONFIG_RFS_ACCEL 1526add72477SBen Hutchings kfree(efx->rps_flow_id); 1527add72477SBen Hutchings #endif 1528add72477SBen Hutchings efx->type->filter_table_remove(efx); 1529add72477SBen Hutchings } 1530add72477SBen Hutchings 1531add72477SBen Hutchings static void efx_restore_filters(struct efx_nic *efx) 1532add72477SBen Hutchings { 1533add72477SBen Hutchings efx->type->filter_table_restore(efx); 1534add72477SBen Hutchings } 1535add72477SBen Hutchings 1536874aeea5SJeff Kirsher /************************************************************************** 1537874aeea5SJeff Kirsher * 1538874aeea5SJeff Kirsher * NIC startup/shutdown 1539874aeea5SJeff Kirsher * 1540874aeea5SJeff Kirsher *************************************************************************/ 1541874aeea5SJeff Kirsher 1542874aeea5SJeff Kirsher static int efx_probe_all(struct efx_nic *efx) 1543874aeea5SJeff Kirsher { 1544874aeea5SJeff Kirsher int rc; 1545874aeea5SJeff Kirsher 1546874aeea5SJeff Kirsher rc = efx_probe_nic(efx); 1547874aeea5SJeff Kirsher if (rc) { 1548874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, "failed to create NIC\n"); 1549874aeea5SJeff Kirsher goto fail1; 1550874aeea5SJeff Kirsher } 1551874aeea5SJeff Kirsher 1552874aeea5SJeff Kirsher rc = efx_probe_port(efx); 1553874aeea5SJeff Kirsher if (rc) { 1554874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, "failed to create port\n"); 1555874aeea5SJeff Kirsher goto fail2; 1556874aeea5SJeff Kirsher } 1557874aeea5SJeff Kirsher 15587e6d06f0SBen Hutchings BUILD_BUG_ON(EFX_DEFAULT_DMAQ_SIZE < EFX_RXQ_MIN_ENT); 15597e6d06f0SBen Hutchings if (WARN_ON(EFX_DEFAULT_DMAQ_SIZE < EFX_TXQ_MIN_ENT(efx))) { 15607e6d06f0SBen Hutchings rc = -EINVAL; 15617e6d06f0SBen Hutchings goto fail3; 15627e6d06f0SBen Hutchings } 1563874aeea5SJeff Kirsher efx->rxq_entries = efx->txq_entries = EFX_DEFAULT_DMAQ_SIZE; 1564874aeea5SJeff Kirsher 1565874aeea5SJeff Kirsher rc = efx_probe_filters(efx); 1566874aeea5SJeff Kirsher if (rc) { 1567874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 1568874aeea5SJeff Kirsher "failed to create filter tables\n"); 15697f967c01SBen Hutchings goto fail3; 1570874aeea5SJeff Kirsher } 1571874aeea5SJeff Kirsher 15727f967c01SBen Hutchings rc = efx_probe_channels(efx); 15737f967c01SBen Hutchings if (rc) 15747f967c01SBen Hutchings goto fail4; 15757f967c01SBen Hutchings 1576874aeea5SJeff Kirsher return 0; 1577874aeea5SJeff Kirsher 1578874aeea5SJeff Kirsher fail4: 15797f967c01SBen Hutchings efx_remove_filters(efx); 1580874aeea5SJeff Kirsher fail3: 1581874aeea5SJeff Kirsher efx_remove_port(efx); 1582874aeea5SJeff Kirsher fail2: 1583874aeea5SJeff Kirsher efx_remove_nic(efx); 1584874aeea5SJeff Kirsher fail1: 1585874aeea5SJeff Kirsher return rc; 1586874aeea5SJeff Kirsher } 1587874aeea5SJeff Kirsher 15888b7325b4SBen Hutchings /* If the interface is supposed to be running but is not, start 15898b7325b4SBen Hutchings * the hardware and software data path, regular activity for the port 15908b7325b4SBen Hutchings * (MAC statistics, link polling, etc.) and schedule the port to be 15918b7325b4SBen Hutchings * reconfigured. Interrupts must already be enabled. This function 15928b7325b4SBen Hutchings * is safe to call multiple times, so long as the NIC is not disabled. 15938b7325b4SBen Hutchings * Requires the RTNL lock. 15949f2cb71cSBen Hutchings */ 1595874aeea5SJeff Kirsher static void efx_start_all(struct efx_nic *efx) 1596874aeea5SJeff Kirsher { 1597874aeea5SJeff Kirsher EFX_ASSERT_RESET_SERIALISED(efx); 15988b7325b4SBen Hutchings BUG_ON(efx->state == STATE_DISABLED); 1599874aeea5SJeff Kirsher 1600874aeea5SJeff Kirsher /* Check that it is appropriate to restart the interface. All 1601874aeea5SJeff Kirsher * of these flags are safe to read under just the rtnl lock */ 16028b7325b4SBen Hutchings if (efx->port_enabled || !netif_running(efx->net_dev)) 1603874aeea5SJeff Kirsher return; 1604874aeea5SJeff Kirsher 1605874aeea5SJeff Kirsher efx_start_port(efx); 16069f2cb71cSBen Hutchings efx_start_datapath(efx); 1607874aeea5SJeff Kirsher 1608626950dbSAlexandre Rames /* Start the hardware monitor if there is one */ 1609626950dbSAlexandre Rames if (efx->type->monitor != NULL) 1610874aeea5SJeff Kirsher queue_delayed_work(efx->workqueue, &efx->monitor_work, 1611874aeea5SJeff Kirsher efx_monitor_interval); 1612626950dbSAlexandre Rames 1613626950dbSAlexandre Rames /* If link state detection is normally event-driven, we have 1614626950dbSAlexandre Rames * to poll now because we could have missed a change 1615626950dbSAlexandre Rames */ 1616626950dbSAlexandre Rames if (efx_nic_rev(efx) >= EFX_REV_SIENA_A0) { 1617874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 1618874aeea5SJeff Kirsher if (efx->phy_op->poll(efx)) 1619874aeea5SJeff Kirsher efx_link_status_changed(efx); 1620874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 1621874aeea5SJeff Kirsher } 1622874aeea5SJeff Kirsher 1623874aeea5SJeff Kirsher efx->type->start_stats(efx); 1624874aeea5SJeff Kirsher } 1625874aeea5SJeff Kirsher 1626874aeea5SJeff Kirsher /* Flush all delayed work. Should only be called when no more delayed work 1627874aeea5SJeff Kirsher * will be scheduled. This doesn't flush pending online resets (efx_reset), 1628874aeea5SJeff Kirsher * since we're holding the rtnl_lock at this point. */ 1629874aeea5SJeff Kirsher static void efx_flush_all(struct efx_nic *efx) 1630874aeea5SJeff Kirsher { 1631dd40781eSBen Hutchings /* Make sure the hardware monitor and event self-test are stopped */ 1632874aeea5SJeff Kirsher cancel_delayed_work_sync(&efx->monitor_work); 1633dd40781eSBen Hutchings efx_selftest_async_cancel(efx); 1634874aeea5SJeff Kirsher /* Stop scheduled port reconfigurations */ 1635874aeea5SJeff Kirsher cancel_work_sync(&efx->mac_work); 1636874aeea5SJeff Kirsher } 1637874aeea5SJeff Kirsher 16388b7325b4SBen Hutchings /* Quiesce the hardware and software data path, and regular activity 16398b7325b4SBen Hutchings * for the port without bringing the link down. Safe to call multiple 16408b7325b4SBen Hutchings * times with the NIC in almost any state, but interrupts should be 16418b7325b4SBen Hutchings * enabled. Requires the RTNL lock. 16428b7325b4SBen Hutchings */ 1643874aeea5SJeff Kirsher static void efx_stop_all(struct efx_nic *efx) 1644874aeea5SJeff Kirsher { 1645874aeea5SJeff Kirsher EFX_ASSERT_RESET_SERIALISED(efx); 1646874aeea5SJeff Kirsher 1647874aeea5SJeff Kirsher /* port_enabled can be read safely under the rtnl lock */ 1648874aeea5SJeff Kirsher if (!efx->port_enabled) 1649874aeea5SJeff Kirsher return; 1650874aeea5SJeff Kirsher 1651874aeea5SJeff Kirsher efx->type->stop_stats(efx); 1652874aeea5SJeff Kirsher efx_stop_port(efx); 1653874aeea5SJeff Kirsher 1654874aeea5SJeff Kirsher /* Flush efx_mac_work(), refill_workqueue, monitor_work */ 1655874aeea5SJeff Kirsher efx_flush_all(efx); 1656874aeea5SJeff Kirsher 165729c69a48SBen Hutchings /* Stop the kernel transmit interface. This is only valid if 165829c69a48SBen Hutchings * the device is stopped or detached; otherwise the watchdog 165929c69a48SBen Hutchings * may fire immediately. 166029c69a48SBen Hutchings */ 166129c69a48SBen Hutchings WARN_ON(netif_running(efx->net_dev) && 166229c69a48SBen Hutchings netif_device_present(efx->net_dev)); 16639f2cb71cSBen Hutchings netif_tx_disable(efx->net_dev); 16649f2cb71cSBen Hutchings 16659f2cb71cSBen Hutchings efx_stop_datapath(efx); 1666874aeea5SJeff Kirsher } 1667874aeea5SJeff Kirsher 1668874aeea5SJeff Kirsher static void efx_remove_all(struct efx_nic *efx) 1669874aeea5SJeff Kirsher { 1670874aeea5SJeff Kirsher efx_remove_channels(efx); 16717f967c01SBen Hutchings efx_remove_filters(efx); 1672874aeea5SJeff Kirsher efx_remove_port(efx); 1673874aeea5SJeff Kirsher efx_remove_nic(efx); 1674874aeea5SJeff Kirsher } 1675874aeea5SJeff Kirsher 1676874aeea5SJeff Kirsher /************************************************************************** 1677874aeea5SJeff Kirsher * 1678874aeea5SJeff Kirsher * Interrupt moderation 1679874aeea5SJeff Kirsher * 1680874aeea5SJeff Kirsher **************************************************************************/ 1681874aeea5SJeff Kirsher 1682cc180b69SBen Hutchings static unsigned int irq_mod_ticks(unsigned int usecs, unsigned int quantum_ns) 1683874aeea5SJeff Kirsher { 1684b548f976SBen Hutchings if (usecs == 0) 1685b548f976SBen Hutchings return 0; 1686cc180b69SBen Hutchings if (usecs * 1000 < quantum_ns) 1687874aeea5SJeff Kirsher return 1; /* never round down to 0 */ 1688cc180b69SBen Hutchings return usecs * 1000 / quantum_ns; 1689874aeea5SJeff Kirsher } 1690874aeea5SJeff Kirsher 1691874aeea5SJeff Kirsher /* Set interrupt moderation parameters */ 16929e393b30SBen Hutchings int efx_init_irq_moderation(struct efx_nic *efx, unsigned int tx_usecs, 16939e393b30SBen Hutchings unsigned int rx_usecs, bool rx_adaptive, 16949e393b30SBen Hutchings bool rx_may_override_tx) 1695874aeea5SJeff Kirsher { 1696874aeea5SJeff Kirsher struct efx_channel *channel; 1697cc180b69SBen Hutchings unsigned int irq_mod_max = DIV_ROUND_UP(efx->type->timer_period_max * 1698cc180b69SBen Hutchings efx->timer_quantum_ns, 1699cc180b69SBen Hutchings 1000); 1700cc180b69SBen Hutchings unsigned int tx_ticks; 1701cc180b69SBen Hutchings unsigned int rx_ticks; 1702874aeea5SJeff Kirsher 1703874aeea5SJeff Kirsher EFX_ASSERT_RESET_SERIALISED(efx); 1704874aeea5SJeff Kirsher 1705cc180b69SBen Hutchings if (tx_usecs > irq_mod_max || rx_usecs > irq_mod_max) 17069e393b30SBen Hutchings return -EINVAL; 17079e393b30SBen Hutchings 1708cc180b69SBen Hutchings tx_ticks = irq_mod_ticks(tx_usecs, efx->timer_quantum_ns); 1709cc180b69SBen Hutchings rx_ticks = irq_mod_ticks(rx_usecs, efx->timer_quantum_ns); 1710cc180b69SBen Hutchings 17119e393b30SBen Hutchings if (tx_ticks != rx_ticks && efx->tx_channel_offset == 0 && 17129e393b30SBen Hutchings !rx_may_override_tx) { 17139e393b30SBen Hutchings netif_err(efx, drv, efx->net_dev, "Channels are shared. " 17149e393b30SBen Hutchings "RX and TX IRQ moderation must be equal\n"); 17159e393b30SBen Hutchings return -EINVAL; 17169e393b30SBen Hutchings } 17179e393b30SBen Hutchings 1718874aeea5SJeff Kirsher efx->irq_rx_adaptive = rx_adaptive; 1719874aeea5SJeff Kirsher efx->irq_rx_moderation = rx_ticks; 1720874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) { 1721874aeea5SJeff Kirsher if (efx_channel_has_rx_queue(channel)) 1722874aeea5SJeff Kirsher channel->irq_moderation = rx_ticks; 1723874aeea5SJeff Kirsher else if (efx_channel_has_tx_queues(channel)) 1724874aeea5SJeff Kirsher channel->irq_moderation = tx_ticks; 1725874aeea5SJeff Kirsher } 17269e393b30SBen Hutchings 17279e393b30SBen Hutchings return 0; 1728874aeea5SJeff Kirsher } 1729874aeea5SJeff Kirsher 1730a0c4faf5SBen Hutchings void efx_get_irq_moderation(struct efx_nic *efx, unsigned int *tx_usecs, 1731a0c4faf5SBen Hutchings unsigned int *rx_usecs, bool *rx_adaptive) 1732a0c4faf5SBen Hutchings { 1733cc180b69SBen Hutchings /* We must round up when converting ticks to microseconds 1734cc180b69SBen Hutchings * because we round down when converting the other way. 1735cc180b69SBen Hutchings */ 1736cc180b69SBen Hutchings 1737a0c4faf5SBen Hutchings *rx_adaptive = efx->irq_rx_adaptive; 1738cc180b69SBen Hutchings *rx_usecs = DIV_ROUND_UP(efx->irq_rx_moderation * 1739cc180b69SBen Hutchings efx->timer_quantum_ns, 1740cc180b69SBen Hutchings 1000); 1741a0c4faf5SBen Hutchings 1742a0c4faf5SBen Hutchings /* If channels are shared between RX and TX, so is IRQ 1743a0c4faf5SBen Hutchings * moderation. Otherwise, IRQ moderation is the same for all 1744a0c4faf5SBen Hutchings * TX channels and is not adaptive. 1745a0c4faf5SBen Hutchings */ 1746a0c4faf5SBen Hutchings if (efx->tx_channel_offset == 0) 1747a0c4faf5SBen Hutchings *tx_usecs = *rx_usecs; 1748a0c4faf5SBen Hutchings else 1749cc180b69SBen Hutchings *tx_usecs = DIV_ROUND_UP( 1750a0c4faf5SBen Hutchings efx->channel[efx->tx_channel_offset]->irq_moderation * 1751cc180b69SBen Hutchings efx->timer_quantum_ns, 1752cc180b69SBen Hutchings 1000); 1753a0c4faf5SBen Hutchings } 1754a0c4faf5SBen Hutchings 1755874aeea5SJeff Kirsher /************************************************************************** 1756874aeea5SJeff Kirsher * 1757874aeea5SJeff Kirsher * Hardware monitor 1758874aeea5SJeff Kirsher * 1759874aeea5SJeff Kirsher **************************************************************************/ 1760874aeea5SJeff Kirsher 1761874aeea5SJeff Kirsher /* Run periodically off the general workqueue */ 1762874aeea5SJeff Kirsher static void efx_monitor(struct work_struct *data) 1763874aeea5SJeff Kirsher { 1764874aeea5SJeff Kirsher struct efx_nic *efx = container_of(data, struct efx_nic, 1765874aeea5SJeff Kirsher monitor_work.work); 1766874aeea5SJeff Kirsher 1767874aeea5SJeff Kirsher netif_vdbg(efx, timer, efx->net_dev, 1768874aeea5SJeff Kirsher "hardware monitor executing on CPU %d\n", 1769874aeea5SJeff Kirsher raw_smp_processor_id()); 1770874aeea5SJeff Kirsher BUG_ON(efx->type->monitor == NULL); 1771874aeea5SJeff Kirsher 1772874aeea5SJeff Kirsher /* If the mac_lock is already held then it is likely a port 1773874aeea5SJeff Kirsher * reconfiguration is already in place, which will likely do 1774874aeea5SJeff Kirsher * most of the work of monitor() anyway. */ 1775874aeea5SJeff Kirsher if (mutex_trylock(&efx->mac_lock)) { 1776874aeea5SJeff Kirsher if (efx->port_enabled) 1777874aeea5SJeff Kirsher efx->type->monitor(efx); 1778874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 1779874aeea5SJeff Kirsher } 1780874aeea5SJeff Kirsher 1781874aeea5SJeff Kirsher queue_delayed_work(efx->workqueue, &efx->monitor_work, 1782874aeea5SJeff Kirsher efx_monitor_interval); 1783874aeea5SJeff Kirsher } 1784874aeea5SJeff Kirsher 1785874aeea5SJeff Kirsher /************************************************************************** 1786874aeea5SJeff Kirsher * 1787874aeea5SJeff Kirsher * ioctls 1788874aeea5SJeff Kirsher * 1789874aeea5SJeff Kirsher *************************************************************************/ 1790874aeea5SJeff Kirsher 1791874aeea5SJeff Kirsher /* Net device ioctl 1792874aeea5SJeff Kirsher * Context: process, rtnl_lock() held. 1793874aeea5SJeff Kirsher */ 1794874aeea5SJeff Kirsher static int efx_ioctl(struct net_device *net_dev, struct ifreq *ifr, int cmd) 1795874aeea5SJeff Kirsher { 1796874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 1797874aeea5SJeff Kirsher struct mii_ioctl_data *data = if_mii(ifr); 1798874aeea5SJeff Kirsher 17997c236c43SStuart Hodgson if (cmd == SIOCSHWTSTAMP) 18007c236c43SStuart Hodgson return efx_ptp_ioctl(efx, ifr, cmd); 18017c236c43SStuart Hodgson 1802874aeea5SJeff Kirsher /* Convert phy_id from older PRTAD/DEVAD format */ 1803874aeea5SJeff Kirsher if ((cmd == SIOCGMIIREG || cmd == SIOCSMIIREG) && 1804874aeea5SJeff Kirsher (data->phy_id & 0xfc00) == 0x0400) 1805874aeea5SJeff Kirsher data->phy_id ^= MDIO_PHY_ID_C45 | 0x0400; 1806874aeea5SJeff Kirsher 1807874aeea5SJeff Kirsher return mdio_mii_ioctl(&efx->mdio, data, cmd); 1808874aeea5SJeff Kirsher } 1809874aeea5SJeff Kirsher 1810874aeea5SJeff Kirsher /************************************************************************** 1811874aeea5SJeff Kirsher * 1812874aeea5SJeff Kirsher * NAPI interface 1813874aeea5SJeff Kirsher * 1814874aeea5SJeff Kirsher **************************************************************************/ 1815874aeea5SJeff Kirsher 18167f967c01SBen Hutchings static void efx_init_napi_channel(struct efx_channel *channel) 1817874aeea5SJeff Kirsher { 18187f967c01SBen Hutchings struct efx_nic *efx = channel->efx; 1819874aeea5SJeff Kirsher 1820874aeea5SJeff Kirsher channel->napi_dev = efx->net_dev; 1821874aeea5SJeff Kirsher netif_napi_add(channel->napi_dev, &channel->napi_str, 1822874aeea5SJeff Kirsher efx_poll, napi_weight); 1823874aeea5SJeff Kirsher } 18247f967c01SBen Hutchings 18257f967c01SBen Hutchings static void efx_init_napi(struct efx_nic *efx) 18267f967c01SBen Hutchings { 18277f967c01SBen Hutchings struct efx_channel *channel; 18287f967c01SBen Hutchings 18297f967c01SBen Hutchings efx_for_each_channel(channel, efx) 18307f967c01SBen Hutchings efx_init_napi_channel(channel); 1831874aeea5SJeff Kirsher } 1832874aeea5SJeff Kirsher 1833874aeea5SJeff Kirsher static void efx_fini_napi_channel(struct efx_channel *channel) 1834874aeea5SJeff Kirsher { 1835874aeea5SJeff Kirsher if (channel->napi_dev) 1836874aeea5SJeff Kirsher netif_napi_del(&channel->napi_str); 1837874aeea5SJeff Kirsher channel->napi_dev = NULL; 1838874aeea5SJeff Kirsher } 1839874aeea5SJeff Kirsher 1840874aeea5SJeff Kirsher static void efx_fini_napi(struct efx_nic *efx) 1841874aeea5SJeff Kirsher { 1842874aeea5SJeff Kirsher struct efx_channel *channel; 1843874aeea5SJeff Kirsher 1844874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) 1845874aeea5SJeff Kirsher efx_fini_napi_channel(channel); 1846874aeea5SJeff Kirsher } 1847874aeea5SJeff Kirsher 1848874aeea5SJeff Kirsher /************************************************************************** 1849874aeea5SJeff Kirsher * 1850874aeea5SJeff Kirsher * Kernel netpoll interface 1851874aeea5SJeff Kirsher * 1852874aeea5SJeff Kirsher *************************************************************************/ 1853874aeea5SJeff Kirsher 1854874aeea5SJeff Kirsher #ifdef CONFIG_NET_POLL_CONTROLLER 1855874aeea5SJeff Kirsher 1856874aeea5SJeff Kirsher /* Although in the common case interrupts will be disabled, this is not 1857874aeea5SJeff Kirsher * guaranteed. However, all our work happens inside the NAPI callback, 1858874aeea5SJeff Kirsher * so no locking is required. 1859874aeea5SJeff Kirsher */ 1860874aeea5SJeff Kirsher static void efx_netpoll(struct net_device *net_dev) 1861874aeea5SJeff Kirsher { 1862874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 1863874aeea5SJeff Kirsher struct efx_channel *channel; 1864874aeea5SJeff Kirsher 1865874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) 1866874aeea5SJeff Kirsher efx_schedule_channel(channel); 1867874aeea5SJeff Kirsher } 1868874aeea5SJeff Kirsher 1869874aeea5SJeff Kirsher #endif 1870874aeea5SJeff Kirsher 1871874aeea5SJeff Kirsher /************************************************************************** 1872874aeea5SJeff Kirsher * 1873874aeea5SJeff Kirsher * Kernel net device interface 1874874aeea5SJeff Kirsher * 1875874aeea5SJeff Kirsher *************************************************************************/ 1876874aeea5SJeff Kirsher 1877874aeea5SJeff Kirsher /* Context: process, rtnl_lock() held. */ 1878874aeea5SJeff Kirsher static int efx_net_open(struct net_device *net_dev) 1879874aeea5SJeff Kirsher { 1880874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 18818b7325b4SBen Hutchings int rc; 18828b7325b4SBen Hutchings 1883874aeea5SJeff Kirsher netif_dbg(efx, ifup, efx->net_dev, "opening device on CPU %d\n", 1884874aeea5SJeff Kirsher raw_smp_processor_id()); 1885874aeea5SJeff Kirsher 18868b7325b4SBen Hutchings rc = efx_check_disabled(efx); 18878b7325b4SBen Hutchings if (rc) 18888b7325b4SBen Hutchings return rc; 1889874aeea5SJeff Kirsher if (efx->phy_mode & PHY_MODE_SPECIAL) 1890874aeea5SJeff Kirsher return -EBUSY; 1891874aeea5SJeff Kirsher if (efx_mcdi_poll_reboot(efx) && efx_reset(efx, RESET_TYPE_ALL)) 1892874aeea5SJeff Kirsher return -EIO; 1893874aeea5SJeff Kirsher 1894874aeea5SJeff Kirsher /* Notify the kernel of the link state polled during driver load, 1895874aeea5SJeff Kirsher * before the monitor starts running */ 1896874aeea5SJeff Kirsher efx_link_status_changed(efx); 1897874aeea5SJeff Kirsher 1898874aeea5SJeff Kirsher efx_start_all(efx); 1899dd40781eSBen Hutchings efx_selftest_async_start(efx); 1900874aeea5SJeff Kirsher return 0; 1901874aeea5SJeff Kirsher } 1902874aeea5SJeff Kirsher 1903874aeea5SJeff Kirsher /* Context: process, rtnl_lock() held. 1904874aeea5SJeff Kirsher * Note that the kernel will ignore our return code; this method 1905874aeea5SJeff Kirsher * should really be a void. 1906874aeea5SJeff Kirsher */ 1907874aeea5SJeff Kirsher static int efx_net_stop(struct net_device *net_dev) 1908874aeea5SJeff Kirsher { 1909874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 1910874aeea5SJeff Kirsher 1911874aeea5SJeff Kirsher netif_dbg(efx, ifdown, efx->net_dev, "closing on CPU %d\n", 1912874aeea5SJeff Kirsher raw_smp_processor_id()); 1913874aeea5SJeff Kirsher 1914874aeea5SJeff Kirsher /* Stop the device and flush all the channels */ 1915874aeea5SJeff Kirsher efx_stop_all(efx); 1916874aeea5SJeff Kirsher 1917874aeea5SJeff Kirsher return 0; 1918874aeea5SJeff Kirsher } 1919874aeea5SJeff Kirsher 1920874aeea5SJeff Kirsher /* Context: process, dev_base_lock or RTNL held, non-blocking. */ 19212aa9ef11SBen Hutchings static struct rtnl_link_stats64 *efx_net_stats(struct net_device *net_dev, 19222aa9ef11SBen Hutchings struct rtnl_link_stats64 *stats) 1923874aeea5SJeff Kirsher { 1924874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 1925874aeea5SJeff Kirsher 1926874aeea5SJeff Kirsher spin_lock_bh(&efx->stats_lock); 1927cd0ecc9aSBen Hutchings efx->type->update_stats(efx, NULL, stats); 19281cb34522SBen Hutchings spin_unlock_bh(&efx->stats_lock); 19291cb34522SBen Hutchings 1930874aeea5SJeff Kirsher return stats; 1931874aeea5SJeff Kirsher } 1932874aeea5SJeff Kirsher 1933874aeea5SJeff Kirsher /* Context: netif_tx_lock held, BHs disabled. */ 1934874aeea5SJeff Kirsher static void efx_watchdog(struct net_device *net_dev) 1935874aeea5SJeff Kirsher { 1936874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 1937874aeea5SJeff Kirsher 1938874aeea5SJeff Kirsher netif_err(efx, tx_err, efx->net_dev, 1939874aeea5SJeff Kirsher "TX stuck with port_enabled=%d: resetting channels\n", 1940874aeea5SJeff Kirsher efx->port_enabled); 1941874aeea5SJeff Kirsher 1942874aeea5SJeff Kirsher efx_schedule_reset(efx, RESET_TYPE_TX_WATCHDOG); 1943874aeea5SJeff Kirsher } 1944874aeea5SJeff Kirsher 1945874aeea5SJeff Kirsher 1946874aeea5SJeff Kirsher /* Context: process, rtnl_lock() held. */ 1947874aeea5SJeff Kirsher static int efx_change_mtu(struct net_device *net_dev, int new_mtu) 1948874aeea5SJeff Kirsher { 1949874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 19508b7325b4SBen Hutchings int rc; 1951874aeea5SJeff Kirsher 19528b7325b4SBen Hutchings rc = efx_check_disabled(efx); 19538b7325b4SBen Hutchings if (rc) 19548b7325b4SBen Hutchings return rc; 1955874aeea5SJeff Kirsher if (new_mtu > EFX_MAX_MTU) 1956874aeea5SJeff Kirsher return -EINVAL; 1957874aeea5SJeff Kirsher 1958874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "changing MTU to %d\n", new_mtu); 1959874aeea5SJeff Kirsher 196029c69a48SBen Hutchings efx_device_detach_sync(efx); 196129c69a48SBen Hutchings efx_stop_all(efx); 196229c69a48SBen Hutchings 1963874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 1964874aeea5SJeff Kirsher net_dev->mtu = new_mtu; 1965710b208dSBen Hutchings efx->type->reconfigure_mac(efx); 1966874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 1967874aeea5SJeff Kirsher 1968874aeea5SJeff Kirsher efx_start_all(efx); 196929c69a48SBen Hutchings netif_device_attach(efx->net_dev); 19706c8eef4aSBen Hutchings return 0; 1971874aeea5SJeff Kirsher } 1972874aeea5SJeff Kirsher 1973874aeea5SJeff Kirsher static int efx_set_mac_address(struct net_device *net_dev, void *data) 1974874aeea5SJeff Kirsher { 1975874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 1976874aeea5SJeff Kirsher struct sockaddr *addr = data; 1977874aeea5SJeff Kirsher char *new_addr = addr->sa_data; 1978874aeea5SJeff Kirsher 1979874aeea5SJeff Kirsher if (!is_valid_ether_addr(new_addr)) { 1980874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, 1981874aeea5SJeff Kirsher "invalid ethernet MAC address requested: %pM\n", 1982874aeea5SJeff Kirsher new_addr); 1983504f9b5aSDanny Kukawka return -EADDRNOTAVAIL; 1984874aeea5SJeff Kirsher } 1985874aeea5SJeff Kirsher 1986874aeea5SJeff Kirsher memcpy(net_dev->dev_addr, new_addr, net_dev->addr_len); 1987cd2d5b52SBen Hutchings efx_sriov_mac_address_changed(efx); 1988874aeea5SJeff Kirsher 1989874aeea5SJeff Kirsher /* Reconfigure the MAC */ 1990874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 1991710b208dSBen Hutchings efx->type->reconfigure_mac(efx); 1992874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 1993874aeea5SJeff Kirsher 1994874aeea5SJeff Kirsher return 0; 1995874aeea5SJeff Kirsher } 1996874aeea5SJeff Kirsher 1997874aeea5SJeff Kirsher /* Context: netif_addr_lock held, BHs disabled. */ 19980fca8c97SBen Hutchings static void efx_set_rx_mode(struct net_device *net_dev) 1999874aeea5SJeff Kirsher { 2000874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 2001874aeea5SJeff Kirsher 2002874aeea5SJeff Kirsher if (efx->port_enabled) 2003874aeea5SJeff Kirsher queue_work(efx->workqueue, &efx->mac_work); 2004874aeea5SJeff Kirsher /* Otherwise efx_start_port() will do this */ 2005874aeea5SJeff Kirsher } 2006874aeea5SJeff Kirsher 2007c8f44affSMichał Mirosław static int efx_set_features(struct net_device *net_dev, netdev_features_t data) 2008874aeea5SJeff Kirsher { 2009874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 2010874aeea5SJeff Kirsher 2011874aeea5SJeff Kirsher /* If disabling RX n-tuple filtering, clear existing filters */ 2012874aeea5SJeff Kirsher if (net_dev->features & ~data & NETIF_F_NTUPLE) 2013874aeea5SJeff Kirsher efx_filter_clear_rx(efx, EFX_FILTER_PRI_MANUAL); 2014874aeea5SJeff Kirsher 2015874aeea5SJeff Kirsher return 0; 2016874aeea5SJeff Kirsher } 2017874aeea5SJeff Kirsher 2018874aeea5SJeff Kirsher static const struct net_device_ops efx_netdev_ops = { 2019874aeea5SJeff Kirsher .ndo_open = efx_net_open, 2020874aeea5SJeff Kirsher .ndo_stop = efx_net_stop, 2021874aeea5SJeff Kirsher .ndo_get_stats64 = efx_net_stats, 2022874aeea5SJeff Kirsher .ndo_tx_timeout = efx_watchdog, 2023874aeea5SJeff Kirsher .ndo_start_xmit = efx_hard_start_xmit, 2024874aeea5SJeff Kirsher .ndo_validate_addr = eth_validate_addr, 2025874aeea5SJeff Kirsher .ndo_do_ioctl = efx_ioctl, 2026874aeea5SJeff Kirsher .ndo_change_mtu = efx_change_mtu, 2027874aeea5SJeff Kirsher .ndo_set_mac_address = efx_set_mac_address, 20280fca8c97SBen Hutchings .ndo_set_rx_mode = efx_set_rx_mode, 2029874aeea5SJeff Kirsher .ndo_set_features = efx_set_features, 2030cd2d5b52SBen Hutchings #ifdef CONFIG_SFC_SRIOV 2031cd2d5b52SBen Hutchings .ndo_set_vf_mac = efx_sriov_set_vf_mac, 2032cd2d5b52SBen Hutchings .ndo_set_vf_vlan = efx_sriov_set_vf_vlan, 2033cd2d5b52SBen Hutchings .ndo_set_vf_spoofchk = efx_sriov_set_vf_spoofchk, 2034cd2d5b52SBen Hutchings .ndo_get_vf_config = efx_sriov_get_vf_config, 2035cd2d5b52SBen Hutchings #endif 2036874aeea5SJeff Kirsher #ifdef CONFIG_NET_POLL_CONTROLLER 2037874aeea5SJeff Kirsher .ndo_poll_controller = efx_netpoll, 2038874aeea5SJeff Kirsher #endif 2039874aeea5SJeff Kirsher .ndo_setup_tc = efx_setup_tc, 2040874aeea5SJeff Kirsher #ifdef CONFIG_RFS_ACCEL 2041874aeea5SJeff Kirsher .ndo_rx_flow_steer = efx_filter_rfs, 2042874aeea5SJeff Kirsher #endif 2043874aeea5SJeff Kirsher }; 2044874aeea5SJeff Kirsher 2045874aeea5SJeff Kirsher static void efx_update_name(struct efx_nic *efx) 2046874aeea5SJeff Kirsher { 2047874aeea5SJeff Kirsher strcpy(efx->name, efx->net_dev->name); 2048874aeea5SJeff Kirsher efx_mtd_rename(efx); 2049874aeea5SJeff Kirsher efx_set_channel_names(efx); 2050874aeea5SJeff Kirsher } 2051874aeea5SJeff Kirsher 2052874aeea5SJeff Kirsher static int efx_netdev_event(struct notifier_block *this, 2053874aeea5SJeff Kirsher unsigned long event, void *ptr) 2054874aeea5SJeff Kirsher { 2055351638e7SJiri Pirko struct net_device *net_dev = netdev_notifier_info_to_dev(ptr); 2056874aeea5SJeff Kirsher 2057874aeea5SJeff Kirsher if (net_dev->netdev_ops == &efx_netdev_ops && 2058874aeea5SJeff Kirsher event == NETDEV_CHANGENAME) 2059874aeea5SJeff Kirsher efx_update_name(netdev_priv(net_dev)); 2060874aeea5SJeff Kirsher 2061874aeea5SJeff Kirsher return NOTIFY_DONE; 2062874aeea5SJeff Kirsher } 2063874aeea5SJeff Kirsher 2064874aeea5SJeff Kirsher static struct notifier_block efx_netdev_notifier = { 2065874aeea5SJeff Kirsher .notifier_call = efx_netdev_event, 2066874aeea5SJeff Kirsher }; 2067874aeea5SJeff Kirsher 2068874aeea5SJeff Kirsher static ssize_t 2069874aeea5SJeff Kirsher show_phy_type(struct device *dev, struct device_attribute *attr, char *buf) 2070874aeea5SJeff Kirsher { 2071874aeea5SJeff Kirsher struct efx_nic *efx = pci_get_drvdata(to_pci_dev(dev)); 2072874aeea5SJeff Kirsher return sprintf(buf, "%d\n", efx->phy_type); 2073874aeea5SJeff Kirsher } 2074776fbcc9SBen Hutchings static DEVICE_ATTR(phy_type, 0444, show_phy_type, NULL); 2075874aeea5SJeff Kirsher 2076874aeea5SJeff Kirsher static int efx_register_netdev(struct efx_nic *efx) 2077874aeea5SJeff Kirsher { 2078874aeea5SJeff Kirsher struct net_device *net_dev = efx->net_dev; 2079874aeea5SJeff Kirsher struct efx_channel *channel; 2080874aeea5SJeff Kirsher int rc; 2081874aeea5SJeff Kirsher 2082874aeea5SJeff Kirsher net_dev->watchdog_timeo = 5 * HZ; 2083874aeea5SJeff Kirsher net_dev->irq = efx->pci_dev->irq; 2084874aeea5SJeff Kirsher net_dev->netdev_ops = &efx_netdev_ops; 2085874aeea5SJeff Kirsher SET_ETHTOOL_OPS(net_dev, &efx_ethtool_ops); 20867e6d06f0SBen Hutchings net_dev->gso_max_segs = EFX_TSO_MAX_SEGS; 2087874aeea5SJeff Kirsher 2088874aeea5SJeff Kirsher rtnl_lock(); 2089874aeea5SJeff Kirsher 20907153f623SBen Hutchings /* Enable resets to be scheduled and check whether any were 20917153f623SBen Hutchings * already requested. If so, the NIC is probably hosed so we 20927153f623SBen Hutchings * abort. 20937153f623SBen Hutchings */ 20947153f623SBen Hutchings efx->state = STATE_READY; 20957153f623SBen Hutchings smp_mb(); /* ensure we change state before checking reset_pending */ 20967153f623SBen Hutchings if (efx->reset_pending) { 20977153f623SBen Hutchings netif_err(efx, probe, efx->net_dev, 20987153f623SBen Hutchings "aborting probe due to scheduled reset\n"); 20997153f623SBen Hutchings rc = -EIO; 21007153f623SBen Hutchings goto fail_locked; 21017153f623SBen Hutchings } 21027153f623SBen Hutchings 2103874aeea5SJeff Kirsher rc = dev_alloc_name(net_dev, net_dev->name); 2104874aeea5SJeff Kirsher if (rc < 0) 2105874aeea5SJeff Kirsher goto fail_locked; 2106874aeea5SJeff Kirsher efx_update_name(efx); 2107874aeea5SJeff Kirsher 21088f8b3d51SBen Hutchings /* Always start with carrier off; PHY events will detect the link */ 21098f8b3d51SBen Hutchings netif_carrier_off(net_dev); 21108f8b3d51SBen Hutchings 2111874aeea5SJeff Kirsher rc = register_netdevice(net_dev); 2112874aeea5SJeff Kirsher if (rc) 2113874aeea5SJeff Kirsher goto fail_locked; 2114874aeea5SJeff Kirsher 2115874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) { 2116874aeea5SJeff Kirsher struct efx_tx_queue *tx_queue; 2117874aeea5SJeff Kirsher efx_for_each_channel_tx_queue(tx_queue, channel) 2118874aeea5SJeff Kirsher efx_init_tx_queue_core_txq(tx_queue); 2119874aeea5SJeff Kirsher } 2120874aeea5SJeff Kirsher 2121874aeea5SJeff Kirsher rtnl_unlock(); 2122874aeea5SJeff Kirsher 2123874aeea5SJeff Kirsher rc = device_create_file(&efx->pci_dev->dev, &dev_attr_phy_type); 2124874aeea5SJeff Kirsher if (rc) { 2125874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, 2126874aeea5SJeff Kirsher "failed to init net dev attributes\n"); 2127874aeea5SJeff Kirsher goto fail_registered; 2128874aeea5SJeff Kirsher } 2129874aeea5SJeff Kirsher 2130874aeea5SJeff Kirsher return 0; 2131874aeea5SJeff Kirsher 21327153f623SBen Hutchings fail_registered: 21337153f623SBen Hutchings rtnl_lock(); 21347153f623SBen Hutchings unregister_netdevice(net_dev); 2135874aeea5SJeff Kirsher fail_locked: 21367153f623SBen Hutchings efx->state = STATE_UNINIT; 2137874aeea5SJeff Kirsher rtnl_unlock(); 2138874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, "could not register net dev\n"); 2139874aeea5SJeff Kirsher return rc; 2140874aeea5SJeff Kirsher } 2141874aeea5SJeff Kirsher 2142874aeea5SJeff Kirsher static void efx_unregister_netdev(struct efx_nic *efx) 2143874aeea5SJeff Kirsher { 2144874aeea5SJeff Kirsher if (!efx->net_dev) 2145874aeea5SJeff Kirsher return; 2146874aeea5SJeff Kirsher 2147874aeea5SJeff Kirsher BUG_ON(netdev_priv(efx->net_dev) != efx); 2148874aeea5SJeff Kirsher 2149874aeea5SJeff Kirsher strlcpy(efx->name, pci_name(efx->pci_dev), sizeof(efx->name)); 2150874aeea5SJeff Kirsher device_remove_file(&efx->pci_dev->dev, &dev_attr_phy_type); 21517153f623SBen Hutchings 21527153f623SBen Hutchings rtnl_lock(); 21537153f623SBen Hutchings unregister_netdevice(efx->net_dev); 21547153f623SBen Hutchings efx->state = STATE_UNINIT; 21557153f623SBen Hutchings rtnl_unlock(); 2156874aeea5SJeff Kirsher } 2157874aeea5SJeff Kirsher 2158874aeea5SJeff Kirsher /************************************************************************** 2159874aeea5SJeff Kirsher * 2160874aeea5SJeff Kirsher * Device reset and suspend 2161874aeea5SJeff Kirsher * 2162874aeea5SJeff Kirsher **************************************************************************/ 2163874aeea5SJeff Kirsher 2164874aeea5SJeff Kirsher /* Tears down the entire software state and most of the hardware state 2165874aeea5SJeff Kirsher * before reset. */ 2166874aeea5SJeff Kirsher void efx_reset_down(struct efx_nic *efx, enum reset_type method) 2167874aeea5SJeff Kirsher { 2168874aeea5SJeff Kirsher EFX_ASSERT_RESET_SERIALISED(efx); 2169874aeea5SJeff Kirsher 2170874aeea5SJeff Kirsher efx_stop_all(efx); 2171d8291187SBen Hutchings efx_disable_interrupts(efx); 21725642ceefSBen Hutchings 21735642ceefSBen Hutchings mutex_lock(&efx->mac_lock); 2174874aeea5SJeff Kirsher if (efx->port_initialized && method != RESET_TYPE_INVISIBLE) 2175874aeea5SJeff Kirsher efx->phy_op->fini(efx); 2176874aeea5SJeff Kirsher efx->type->fini(efx); 2177874aeea5SJeff Kirsher } 2178874aeea5SJeff Kirsher 2179874aeea5SJeff Kirsher /* This function will always ensure that the locks acquired in 2180874aeea5SJeff Kirsher * efx_reset_down() are released. A failure return code indicates 2181874aeea5SJeff Kirsher * that we were unable to reinitialise the hardware, and the 2182874aeea5SJeff Kirsher * driver should be disabled. If ok is false, then the rx and tx 2183874aeea5SJeff Kirsher * engines are not restarted, pending a RESET_DISABLE. */ 2184874aeea5SJeff Kirsher int efx_reset_up(struct efx_nic *efx, enum reset_type method, bool ok) 2185874aeea5SJeff Kirsher { 2186874aeea5SJeff Kirsher int rc; 2187874aeea5SJeff Kirsher 2188874aeea5SJeff Kirsher EFX_ASSERT_RESET_SERIALISED(efx); 2189874aeea5SJeff Kirsher 2190874aeea5SJeff Kirsher rc = efx->type->init(efx); 2191874aeea5SJeff Kirsher if (rc) { 2192874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, "failed to initialise NIC\n"); 2193874aeea5SJeff Kirsher goto fail; 2194874aeea5SJeff Kirsher } 2195874aeea5SJeff Kirsher 2196874aeea5SJeff Kirsher if (!ok) 2197874aeea5SJeff Kirsher goto fail; 2198874aeea5SJeff Kirsher 2199874aeea5SJeff Kirsher if (efx->port_initialized && method != RESET_TYPE_INVISIBLE) { 2200874aeea5SJeff Kirsher rc = efx->phy_op->init(efx); 2201874aeea5SJeff Kirsher if (rc) 2202874aeea5SJeff Kirsher goto fail; 2203874aeea5SJeff Kirsher if (efx->phy_op->reconfigure(efx)) 2204874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, 2205874aeea5SJeff Kirsher "could not restore PHY settings\n"); 2206874aeea5SJeff Kirsher } 2207874aeea5SJeff Kirsher 2208d8291187SBen Hutchings efx_enable_interrupts(efx); 2209874aeea5SJeff Kirsher efx_restore_filters(efx); 2210cd2d5b52SBen Hutchings efx_sriov_reset(efx); 2211874aeea5SJeff Kirsher 2212874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 2213874aeea5SJeff Kirsher 2214874aeea5SJeff Kirsher efx_start_all(efx); 2215874aeea5SJeff Kirsher 2216874aeea5SJeff Kirsher return 0; 2217874aeea5SJeff Kirsher 2218874aeea5SJeff Kirsher fail: 2219874aeea5SJeff Kirsher efx->port_initialized = false; 2220874aeea5SJeff Kirsher 2221874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 2222874aeea5SJeff Kirsher 2223874aeea5SJeff Kirsher return rc; 2224874aeea5SJeff Kirsher } 2225874aeea5SJeff Kirsher 2226874aeea5SJeff Kirsher /* Reset the NIC using the specified method. Note that the reset may 2227874aeea5SJeff Kirsher * fail, in which case the card will be left in an unusable state. 2228874aeea5SJeff Kirsher * 2229874aeea5SJeff Kirsher * Caller must hold the rtnl_lock. 2230874aeea5SJeff Kirsher */ 2231874aeea5SJeff Kirsher int efx_reset(struct efx_nic *efx, enum reset_type method) 2232874aeea5SJeff Kirsher { 2233874aeea5SJeff Kirsher int rc, rc2; 2234874aeea5SJeff Kirsher bool disabled; 2235874aeea5SJeff Kirsher 2236874aeea5SJeff Kirsher netif_info(efx, drv, efx->net_dev, "resetting (%s)\n", 2237874aeea5SJeff Kirsher RESET_TYPE(method)); 2238874aeea5SJeff Kirsher 2239c2f3b8e3SDaniel Pieczko efx_device_detach_sync(efx); 2240874aeea5SJeff Kirsher efx_reset_down(efx, method); 2241874aeea5SJeff Kirsher 2242874aeea5SJeff Kirsher rc = efx->type->reset(efx, method); 2243874aeea5SJeff Kirsher if (rc) { 2244874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, "failed to reset hardware\n"); 2245874aeea5SJeff Kirsher goto out; 2246874aeea5SJeff Kirsher } 2247874aeea5SJeff Kirsher 2248874aeea5SJeff Kirsher /* Clear flags for the scopes we covered. We assume the NIC and 2249874aeea5SJeff Kirsher * driver are now quiescent so that there is no race here. 2250874aeea5SJeff Kirsher */ 2251874aeea5SJeff Kirsher efx->reset_pending &= -(1 << (method + 1)); 2252874aeea5SJeff Kirsher 2253874aeea5SJeff Kirsher /* Reinitialise bus-mastering, which may have been turned off before 2254874aeea5SJeff Kirsher * the reset was scheduled. This is still appropriate, even in the 2255874aeea5SJeff Kirsher * RESET_TYPE_DISABLE since this driver generally assumes the hardware 2256874aeea5SJeff Kirsher * can respond to requests. */ 2257874aeea5SJeff Kirsher pci_set_master(efx->pci_dev); 2258874aeea5SJeff Kirsher 2259874aeea5SJeff Kirsher out: 2260874aeea5SJeff Kirsher /* Leave device stopped if necessary */ 2261626950dbSAlexandre Rames disabled = rc || 2262626950dbSAlexandre Rames method == RESET_TYPE_DISABLE || 2263626950dbSAlexandre Rames method == RESET_TYPE_RECOVER_OR_DISABLE; 2264874aeea5SJeff Kirsher rc2 = efx_reset_up(efx, method, !disabled); 2265874aeea5SJeff Kirsher if (rc2) { 2266874aeea5SJeff Kirsher disabled = true; 2267874aeea5SJeff Kirsher if (!rc) 2268874aeea5SJeff Kirsher rc = rc2; 2269874aeea5SJeff Kirsher } 2270874aeea5SJeff Kirsher 2271874aeea5SJeff Kirsher if (disabled) { 2272874aeea5SJeff Kirsher dev_close(efx->net_dev); 2273874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, "has been disabled\n"); 2274874aeea5SJeff Kirsher efx->state = STATE_DISABLED; 2275874aeea5SJeff Kirsher } else { 2276874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "reset complete\n"); 2277874aeea5SJeff Kirsher netif_device_attach(efx->net_dev); 2278874aeea5SJeff Kirsher } 2279874aeea5SJeff Kirsher return rc; 2280874aeea5SJeff Kirsher } 2281874aeea5SJeff Kirsher 2282626950dbSAlexandre Rames /* Try recovery mechanisms. 2283626950dbSAlexandre Rames * For now only EEH is supported. 2284626950dbSAlexandre Rames * Returns 0 if the recovery mechanisms are unsuccessful. 2285626950dbSAlexandre Rames * Returns a non-zero value otherwise. 2286626950dbSAlexandre Rames */ 2287b28405b0SAlexandre Rames int efx_try_recovery(struct efx_nic *efx) 2288626950dbSAlexandre Rames { 2289626950dbSAlexandre Rames #ifdef CONFIG_EEH 2290626950dbSAlexandre Rames /* A PCI error can occur and not be seen by EEH because nothing 2291626950dbSAlexandre Rames * happens on the PCI bus. In this case the driver may fail and 2292626950dbSAlexandre Rames * schedule a 'recover or reset', leading to this recovery handler. 2293626950dbSAlexandre Rames * Manually call the eeh failure check function. 2294626950dbSAlexandre Rames */ 2295626950dbSAlexandre Rames struct eeh_dev *eehdev = 2296626950dbSAlexandre Rames of_node_to_eeh_dev(pci_device_to_OF_node(efx->pci_dev)); 2297626950dbSAlexandre Rames 2298626950dbSAlexandre Rames if (eeh_dev_check_failure(eehdev)) { 2299626950dbSAlexandre Rames /* The EEH mechanisms will handle the error and reset the 2300626950dbSAlexandre Rames * device if necessary. 2301626950dbSAlexandre Rames */ 2302626950dbSAlexandre Rames return 1; 2303626950dbSAlexandre Rames } 2304626950dbSAlexandre Rames #endif 2305626950dbSAlexandre Rames return 0; 2306626950dbSAlexandre Rames } 2307626950dbSAlexandre Rames 2308874aeea5SJeff Kirsher /* The worker thread exists so that code that cannot sleep can 2309874aeea5SJeff Kirsher * schedule a reset for later. 2310874aeea5SJeff Kirsher */ 2311874aeea5SJeff Kirsher static void efx_reset_work(struct work_struct *data) 2312874aeea5SJeff Kirsher { 2313874aeea5SJeff Kirsher struct efx_nic *efx = container_of(data, struct efx_nic, reset_work); 2314626950dbSAlexandre Rames unsigned long pending; 2315626950dbSAlexandre Rames enum reset_type method; 2316626950dbSAlexandre Rames 2317626950dbSAlexandre Rames pending = ACCESS_ONCE(efx->reset_pending); 2318626950dbSAlexandre Rames method = fls(pending) - 1; 2319626950dbSAlexandre Rames 2320626950dbSAlexandre Rames if ((method == RESET_TYPE_RECOVER_OR_DISABLE || 2321626950dbSAlexandre Rames method == RESET_TYPE_RECOVER_OR_ALL) && 2322626950dbSAlexandre Rames efx_try_recovery(efx)) 2323626950dbSAlexandre Rames return; 2324874aeea5SJeff Kirsher 2325874aeea5SJeff Kirsher if (!pending) 2326874aeea5SJeff Kirsher return; 2327874aeea5SJeff Kirsher 2328874aeea5SJeff Kirsher rtnl_lock(); 23297153f623SBen Hutchings 23307153f623SBen Hutchings /* We checked the state in efx_schedule_reset() but it may 23317153f623SBen Hutchings * have changed by now. Now that we have the RTNL lock, 23327153f623SBen Hutchings * it cannot change again. 23337153f623SBen Hutchings */ 23347153f623SBen Hutchings if (efx->state == STATE_READY) 2335626950dbSAlexandre Rames (void)efx_reset(efx, method); 23367153f623SBen Hutchings 2337874aeea5SJeff Kirsher rtnl_unlock(); 2338874aeea5SJeff Kirsher } 2339874aeea5SJeff Kirsher 2340874aeea5SJeff Kirsher void efx_schedule_reset(struct efx_nic *efx, enum reset_type type) 2341874aeea5SJeff Kirsher { 2342874aeea5SJeff Kirsher enum reset_type method; 2343874aeea5SJeff Kirsher 2344626950dbSAlexandre Rames if (efx->state == STATE_RECOVERY) { 2345626950dbSAlexandre Rames netif_dbg(efx, drv, efx->net_dev, 2346626950dbSAlexandre Rames "recovering: skip scheduling %s reset\n", 2347626950dbSAlexandre Rames RESET_TYPE(type)); 2348626950dbSAlexandre Rames return; 2349626950dbSAlexandre Rames } 2350626950dbSAlexandre Rames 2351874aeea5SJeff Kirsher switch (type) { 2352874aeea5SJeff Kirsher case RESET_TYPE_INVISIBLE: 2353874aeea5SJeff Kirsher case RESET_TYPE_ALL: 2354626950dbSAlexandre Rames case RESET_TYPE_RECOVER_OR_ALL: 2355874aeea5SJeff Kirsher case RESET_TYPE_WORLD: 2356874aeea5SJeff Kirsher case RESET_TYPE_DISABLE: 2357626950dbSAlexandre Rames case RESET_TYPE_RECOVER_OR_DISABLE: 2358874aeea5SJeff Kirsher method = type; 2359874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "scheduling %s reset\n", 2360874aeea5SJeff Kirsher RESET_TYPE(method)); 2361874aeea5SJeff Kirsher break; 2362874aeea5SJeff Kirsher default: 2363874aeea5SJeff Kirsher method = efx->type->map_reset_reason(type); 2364874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, 2365874aeea5SJeff Kirsher "scheduling %s reset for %s\n", 2366874aeea5SJeff Kirsher RESET_TYPE(method), RESET_TYPE(type)); 2367874aeea5SJeff Kirsher break; 2368874aeea5SJeff Kirsher } 2369874aeea5SJeff Kirsher 2370874aeea5SJeff Kirsher set_bit(method, &efx->reset_pending); 23717153f623SBen Hutchings smp_mb(); /* ensure we change reset_pending before checking state */ 23727153f623SBen Hutchings 23737153f623SBen Hutchings /* If we're not READY then just leave the flags set as the cue 23747153f623SBen Hutchings * to abort probing or reschedule the reset later. 23757153f623SBen Hutchings */ 23767153f623SBen Hutchings if (ACCESS_ONCE(efx->state) != STATE_READY) 23777153f623SBen Hutchings return; 2378874aeea5SJeff Kirsher 2379874aeea5SJeff Kirsher /* efx_process_channel() will no longer read events once a 2380874aeea5SJeff Kirsher * reset is scheduled. So switch back to poll'd MCDI completions. */ 2381874aeea5SJeff Kirsher efx_mcdi_mode_poll(efx); 2382874aeea5SJeff Kirsher 2383874aeea5SJeff Kirsher queue_work(reset_workqueue, &efx->reset_work); 2384874aeea5SJeff Kirsher } 2385874aeea5SJeff Kirsher 2386874aeea5SJeff Kirsher /************************************************************************** 2387874aeea5SJeff Kirsher * 2388874aeea5SJeff Kirsher * List of NICs we support 2389874aeea5SJeff Kirsher * 2390874aeea5SJeff Kirsher **************************************************************************/ 2391874aeea5SJeff Kirsher 2392874aeea5SJeff Kirsher /* PCI device ID table */ 2393874aeea5SJeff Kirsher static DEFINE_PCI_DEVICE_TABLE(efx_pci_table) = { 23940e59e7e7SLinus Torvalds {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 23950e59e7e7SLinus Torvalds PCI_DEVICE_ID_SOLARFLARE_SFC4000A_0), 2396874aeea5SJeff Kirsher .driver_data = (unsigned long) &falcon_a1_nic_type}, 23970e59e7e7SLinus Torvalds {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 23980e59e7e7SLinus Torvalds PCI_DEVICE_ID_SOLARFLARE_SFC4000B), 2399874aeea5SJeff Kirsher .driver_data = (unsigned long) &falcon_b0_nic_type}, 2400547c474fSBen Hutchings {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0803), /* SFC9020 */ 2401874aeea5SJeff Kirsher .driver_data = (unsigned long) &siena_a0_nic_type}, 2402547c474fSBen Hutchings {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0813), /* SFL9021 */ 2403874aeea5SJeff Kirsher .driver_data = (unsigned long) &siena_a0_nic_type}, 2404874aeea5SJeff Kirsher {0} /* end of list */ 2405874aeea5SJeff Kirsher }; 2406874aeea5SJeff Kirsher 2407874aeea5SJeff Kirsher /************************************************************************** 2408874aeea5SJeff Kirsher * 2409874aeea5SJeff Kirsher * Dummy PHY/MAC operations 2410874aeea5SJeff Kirsher * 2411874aeea5SJeff Kirsher * Can be used for some unimplemented operations 2412874aeea5SJeff Kirsher * Needed so all function pointers are valid and do not have to be tested 2413874aeea5SJeff Kirsher * before use 2414874aeea5SJeff Kirsher * 2415874aeea5SJeff Kirsher **************************************************************************/ 2416874aeea5SJeff Kirsher int efx_port_dummy_op_int(struct efx_nic *efx) 2417874aeea5SJeff Kirsher { 2418874aeea5SJeff Kirsher return 0; 2419874aeea5SJeff Kirsher } 2420874aeea5SJeff Kirsher void efx_port_dummy_op_void(struct efx_nic *efx) {} 2421874aeea5SJeff Kirsher 2422874aeea5SJeff Kirsher static bool efx_port_dummy_op_poll(struct efx_nic *efx) 2423874aeea5SJeff Kirsher { 2424874aeea5SJeff Kirsher return false; 2425874aeea5SJeff Kirsher } 2426874aeea5SJeff Kirsher 2427874aeea5SJeff Kirsher static const struct efx_phy_operations efx_dummy_phy_operations = { 2428874aeea5SJeff Kirsher .init = efx_port_dummy_op_int, 2429874aeea5SJeff Kirsher .reconfigure = efx_port_dummy_op_int, 2430874aeea5SJeff Kirsher .poll = efx_port_dummy_op_poll, 2431874aeea5SJeff Kirsher .fini = efx_port_dummy_op_void, 2432874aeea5SJeff Kirsher }; 2433874aeea5SJeff Kirsher 2434874aeea5SJeff Kirsher /************************************************************************** 2435874aeea5SJeff Kirsher * 2436874aeea5SJeff Kirsher * Data housekeeping 2437874aeea5SJeff Kirsher * 2438874aeea5SJeff Kirsher **************************************************************************/ 2439874aeea5SJeff Kirsher 2440874aeea5SJeff Kirsher /* This zeroes out and then fills in the invariants in a struct 2441874aeea5SJeff Kirsher * efx_nic (including all sub-structures). 2442874aeea5SJeff Kirsher */ 2443adeb15aaSBen Hutchings static int efx_init_struct(struct efx_nic *efx, 2444874aeea5SJeff Kirsher struct pci_dev *pci_dev, struct net_device *net_dev) 2445874aeea5SJeff Kirsher { 2446874aeea5SJeff Kirsher int i; 2447874aeea5SJeff Kirsher 2448874aeea5SJeff Kirsher /* Initialise common structures */ 2449874aeea5SJeff Kirsher spin_lock_init(&efx->biu_lock); 2450874aeea5SJeff Kirsher #ifdef CONFIG_SFC_MTD 2451874aeea5SJeff Kirsher INIT_LIST_HEAD(&efx->mtd_list); 2452874aeea5SJeff Kirsher #endif 2453874aeea5SJeff Kirsher INIT_WORK(&efx->reset_work, efx_reset_work); 2454874aeea5SJeff Kirsher INIT_DELAYED_WORK(&efx->monitor_work, efx_monitor); 2455dd40781eSBen Hutchings INIT_DELAYED_WORK(&efx->selftest_work, efx_selftest_async_work); 2456874aeea5SJeff Kirsher efx->pci_dev = pci_dev; 2457874aeea5SJeff Kirsher efx->msg_enable = debug; 2458f16aeea0SBen Hutchings efx->state = STATE_UNINIT; 2459874aeea5SJeff Kirsher strlcpy(efx->name, pci_name(pci_dev), sizeof(efx->name)); 2460874aeea5SJeff Kirsher 2461874aeea5SJeff Kirsher efx->net_dev = net_dev; 246243a3739dSJon Cooper efx->rx_prefix_size = efx->type->rx_prefix_size; 246343a3739dSJon Cooper efx->rx_packet_hash_offset = 246443a3739dSJon Cooper efx->type->rx_hash_offset - efx->type->rx_prefix_size; 2465874aeea5SJeff Kirsher spin_lock_init(&efx->stats_lock); 2466874aeea5SJeff Kirsher mutex_init(&efx->mac_lock); 2467874aeea5SJeff Kirsher efx->phy_op = &efx_dummy_phy_operations; 2468874aeea5SJeff Kirsher efx->mdio.dev = net_dev; 2469874aeea5SJeff Kirsher INIT_WORK(&efx->mac_work, efx_mac_work); 24709f2cb71cSBen Hutchings init_waitqueue_head(&efx->flush_wq); 2471874aeea5SJeff Kirsher 2472874aeea5SJeff Kirsher for (i = 0; i < EFX_MAX_CHANNELS; i++) { 2473874aeea5SJeff Kirsher efx->channel[i] = efx_alloc_channel(efx, i, NULL); 2474874aeea5SJeff Kirsher if (!efx->channel[i]) 2475874aeea5SJeff Kirsher goto fail; 2476d8291187SBen Hutchings efx->msi_context[i].efx = efx; 2477d8291187SBen Hutchings efx->msi_context[i].index = i; 2478874aeea5SJeff Kirsher } 2479874aeea5SJeff Kirsher 2480874aeea5SJeff Kirsher /* Higher numbered interrupt modes are less capable! */ 2481874aeea5SJeff Kirsher efx->interrupt_mode = max(efx->type->max_interrupt_mode, 2482874aeea5SJeff Kirsher interrupt_mode); 2483874aeea5SJeff Kirsher 2484874aeea5SJeff Kirsher /* Would be good to use the net_dev name, but we're too early */ 2485874aeea5SJeff Kirsher snprintf(efx->workqueue_name, sizeof(efx->workqueue_name), "sfc%s", 2486874aeea5SJeff Kirsher pci_name(pci_dev)); 2487874aeea5SJeff Kirsher efx->workqueue = create_singlethread_workqueue(efx->workqueue_name); 2488874aeea5SJeff Kirsher if (!efx->workqueue) 2489874aeea5SJeff Kirsher goto fail; 2490874aeea5SJeff Kirsher 2491874aeea5SJeff Kirsher return 0; 2492874aeea5SJeff Kirsher 2493874aeea5SJeff Kirsher fail: 2494874aeea5SJeff Kirsher efx_fini_struct(efx); 2495874aeea5SJeff Kirsher return -ENOMEM; 2496874aeea5SJeff Kirsher } 2497874aeea5SJeff Kirsher 2498874aeea5SJeff Kirsher static void efx_fini_struct(struct efx_nic *efx) 2499874aeea5SJeff Kirsher { 2500874aeea5SJeff Kirsher int i; 2501874aeea5SJeff Kirsher 2502874aeea5SJeff Kirsher for (i = 0; i < EFX_MAX_CHANNELS; i++) 2503874aeea5SJeff Kirsher kfree(efx->channel[i]); 2504874aeea5SJeff Kirsher 2505874aeea5SJeff Kirsher if (efx->workqueue) { 2506874aeea5SJeff Kirsher destroy_workqueue(efx->workqueue); 2507874aeea5SJeff Kirsher efx->workqueue = NULL; 2508874aeea5SJeff Kirsher } 2509874aeea5SJeff Kirsher } 2510874aeea5SJeff Kirsher 2511874aeea5SJeff Kirsher /************************************************************************** 2512874aeea5SJeff Kirsher * 2513874aeea5SJeff Kirsher * PCI interface 2514874aeea5SJeff Kirsher * 2515874aeea5SJeff Kirsher **************************************************************************/ 2516874aeea5SJeff Kirsher 2517874aeea5SJeff Kirsher /* Main body of final NIC shutdown code 2518874aeea5SJeff Kirsher * This is called only at module unload (or hotplug removal). 2519874aeea5SJeff Kirsher */ 2520874aeea5SJeff Kirsher static void efx_pci_remove_main(struct efx_nic *efx) 2521874aeea5SJeff Kirsher { 25227153f623SBen Hutchings /* Flush reset_work. It can no longer be scheduled since we 25237153f623SBen Hutchings * are not READY. 25247153f623SBen Hutchings */ 25257153f623SBen Hutchings BUG_ON(efx->state == STATE_READY); 25267153f623SBen Hutchings cancel_work_sync(&efx->reset_work); 25277153f623SBen Hutchings 2528d8291187SBen Hutchings efx_disable_interrupts(efx); 2529874aeea5SJeff Kirsher efx_nic_fini_interrupt(efx); 2530874aeea5SJeff Kirsher efx_fini_port(efx); 2531874aeea5SJeff Kirsher efx->type->fini(efx); 2532874aeea5SJeff Kirsher efx_fini_napi(efx); 2533874aeea5SJeff Kirsher efx_remove_all(efx); 2534874aeea5SJeff Kirsher } 2535874aeea5SJeff Kirsher 2536874aeea5SJeff Kirsher /* Final NIC shutdown 2537874aeea5SJeff Kirsher * This is called only at module unload (or hotplug removal). 2538874aeea5SJeff Kirsher */ 2539874aeea5SJeff Kirsher static void efx_pci_remove(struct pci_dev *pci_dev) 2540874aeea5SJeff Kirsher { 2541874aeea5SJeff Kirsher struct efx_nic *efx; 2542874aeea5SJeff Kirsher 2543874aeea5SJeff Kirsher efx = pci_get_drvdata(pci_dev); 2544874aeea5SJeff Kirsher if (!efx) 2545874aeea5SJeff Kirsher return; 2546874aeea5SJeff Kirsher 2547874aeea5SJeff Kirsher /* Mark the NIC as fini, then stop the interface */ 2548874aeea5SJeff Kirsher rtnl_lock(); 2549874aeea5SJeff Kirsher dev_close(efx->net_dev); 2550d8291187SBen Hutchings efx_disable_interrupts(efx); 2551874aeea5SJeff Kirsher rtnl_unlock(); 2552874aeea5SJeff Kirsher 2553cd2d5b52SBen Hutchings efx_sriov_fini(efx); 2554874aeea5SJeff Kirsher efx_unregister_netdev(efx); 2555874aeea5SJeff Kirsher 2556874aeea5SJeff Kirsher efx_mtd_remove(efx); 2557874aeea5SJeff Kirsher 2558874aeea5SJeff Kirsher efx_pci_remove_main(efx); 2559874aeea5SJeff Kirsher 2560874aeea5SJeff Kirsher efx_fini_io(efx); 2561874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "shutdown successful\n"); 2562874aeea5SJeff Kirsher 2563874aeea5SJeff Kirsher efx_fini_struct(efx); 25643de4e301SBen Hutchings pci_set_drvdata(pci_dev, NULL); 2565874aeea5SJeff Kirsher free_netdev(efx->net_dev); 2566626950dbSAlexandre Rames 2567626950dbSAlexandre Rames pci_disable_pcie_error_reporting(pci_dev); 2568874aeea5SJeff Kirsher }; 2569874aeea5SJeff Kirsher 2570460eeaa0SBen Hutchings /* NIC VPD information 2571460eeaa0SBen Hutchings * Called during probe to display the part number of the 2572460eeaa0SBen Hutchings * installed NIC. VPD is potentially very large but this should 2573460eeaa0SBen Hutchings * always appear within the first 512 bytes. 2574460eeaa0SBen Hutchings */ 2575460eeaa0SBen Hutchings #define SFC_VPD_LEN 512 2576460eeaa0SBen Hutchings static void efx_print_product_vpd(struct efx_nic *efx) 2577460eeaa0SBen Hutchings { 2578460eeaa0SBen Hutchings struct pci_dev *dev = efx->pci_dev; 2579460eeaa0SBen Hutchings char vpd_data[SFC_VPD_LEN]; 2580460eeaa0SBen Hutchings ssize_t vpd_size; 2581460eeaa0SBen Hutchings int i, j; 2582460eeaa0SBen Hutchings 2583460eeaa0SBen Hutchings /* Get the vpd data from the device */ 2584460eeaa0SBen Hutchings vpd_size = pci_read_vpd(dev, 0, sizeof(vpd_data), vpd_data); 2585460eeaa0SBen Hutchings if (vpd_size <= 0) { 2586460eeaa0SBen Hutchings netif_err(efx, drv, efx->net_dev, "Unable to read VPD\n"); 2587460eeaa0SBen Hutchings return; 2588460eeaa0SBen Hutchings } 2589460eeaa0SBen Hutchings 2590460eeaa0SBen Hutchings /* Get the Read only section */ 2591460eeaa0SBen Hutchings i = pci_vpd_find_tag(vpd_data, 0, vpd_size, PCI_VPD_LRDT_RO_DATA); 2592460eeaa0SBen Hutchings if (i < 0) { 2593460eeaa0SBen Hutchings netif_err(efx, drv, efx->net_dev, "VPD Read-only not found\n"); 2594460eeaa0SBen Hutchings return; 2595460eeaa0SBen Hutchings } 2596460eeaa0SBen Hutchings 2597460eeaa0SBen Hutchings j = pci_vpd_lrdt_size(&vpd_data[i]); 2598460eeaa0SBen Hutchings i += PCI_VPD_LRDT_TAG_SIZE; 2599460eeaa0SBen Hutchings if (i + j > vpd_size) 2600460eeaa0SBen Hutchings j = vpd_size - i; 2601460eeaa0SBen Hutchings 2602460eeaa0SBen Hutchings /* Get the Part number */ 2603460eeaa0SBen Hutchings i = pci_vpd_find_info_keyword(vpd_data, i, j, "PN"); 2604460eeaa0SBen Hutchings if (i < 0) { 2605460eeaa0SBen Hutchings netif_err(efx, drv, efx->net_dev, "Part number not found\n"); 2606460eeaa0SBen Hutchings return; 2607460eeaa0SBen Hutchings } 2608460eeaa0SBen Hutchings 2609460eeaa0SBen Hutchings j = pci_vpd_info_field_size(&vpd_data[i]); 2610460eeaa0SBen Hutchings i += PCI_VPD_INFO_FLD_HDR_SIZE; 2611460eeaa0SBen Hutchings if (i + j > vpd_size) { 2612460eeaa0SBen Hutchings netif_err(efx, drv, efx->net_dev, "Incomplete part number\n"); 2613460eeaa0SBen Hutchings return; 2614460eeaa0SBen Hutchings } 2615460eeaa0SBen Hutchings 2616460eeaa0SBen Hutchings netif_info(efx, drv, efx->net_dev, 2617460eeaa0SBen Hutchings "Part Number : %.*s\n", j, &vpd_data[i]); 2618460eeaa0SBen Hutchings } 2619460eeaa0SBen Hutchings 2620460eeaa0SBen Hutchings 2621874aeea5SJeff Kirsher /* Main body of NIC initialisation 2622874aeea5SJeff Kirsher * This is called at module load (or hotplug insertion, theoretically). 2623874aeea5SJeff Kirsher */ 2624874aeea5SJeff Kirsher static int efx_pci_probe_main(struct efx_nic *efx) 2625874aeea5SJeff Kirsher { 2626874aeea5SJeff Kirsher int rc; 2627874aeea5SJeff Kirsher 2628874aeea5SJeff Kirsher /* Do start-of-day initialisation */ 2629874aeea5SJeff Kirsher rc = efx_probe_all(efx); 2630874aeea5SJeff Kirsher if (rc) 2631874aeea5SJeff Kirsher goto fail1; 2632874aeea5SJeff Kirsher 2633874aeea5SJeff Kirsher efx_init_napi(efx); 2634874aeea5SJeff Kirsher 2635874aeea5SJeff Kirsher rc = efx->type->init(efx); 2636874aeea5SJeff Kirsher if (rc) { 2637874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 2638874aeea5SJeff Kirsher "failed to initialise NIC\n"); 2639874aeea5SJeff Kirsher goto fail3; 2640874aeea5SJeff Kirsher } 2641874aeea5SJeff Kirsher 2642874aeea5SJeff Kirsher rc = efx_init_port(efx); 2643874aeea5SJeff Kirsher if (rc) { 2644874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 2645874aeea5SJeff Kirsher "failed to initialise port\n"); 2646874aeea5SJeff Kirsher goto fail4; 2647874aeea5SJeff Kirsher } 2648874aeea5SJeff Kirsher 2649874aeea5SJeff Kirsher rc = efx_nic_init_interrupt(efx); 2650874aeea5SJeff Kirsher if (rc) 2651874aeea5SJeff Kirsher goto fail5; 2652d8291187SBen Hutchings efx_enable_interrupts(efx); 2653874aeea5SJeff Kirsher 2654874aeea5SJeff Kirsher return 0; 2655874aeea5SJeff Kirsher 2656874aeea5SJeff Kirsher fail5: 2657874aeea5SJeff Kirsher efx_fini_port(efx); 2658874aeea5SJeff Kirsher fail4: 2659874aeea5SJeff Kirsher efx->type->fini(efx); 2660874aeea5SJeff Kirsher fail3: 2661874aeea5SJeff Kirsher efx_fini_napi(efx); 2662874aeea5SJeff Kirsher efx_remove_all(efx); 2663874aeea5SJeff Kirsher fail1: 2664874aeea5SJeff Kirsher return rc; 2665874aeea5SJeff Kirsher } 2666874aeea5SJeff Kirsher 2667874aeea5SJeff Kirsher /* NIC initialisation 2668874aeea5SJeff Kirsher * 2669874aeea5SJeff Kirsher * This is called at module load (or hotplug insertion, 267073ba7b68SBen Hutchings * theoretically). It sets up PCI mappings, resets the NIC, 2671874aeea5SJeff Kirsher * sets up and registers the network devices with the kernel and hooks 2672874aeea5SJeff Kirsher * the interrupt service routine. It does not prepare the device for 2673874aeea5SJeff Kirsher * transmission; this is left to the first time one of the network 2674874aeea5SJeff Kirsher * interfaces is brought up (i.e. efx_net_open). 2675874aeea5SJeff Kirsher */ 267687d1fc11SBill Pemberton static int efx_pci_probe(struct pci_dev *pci_dev, 2677874aeea5SJeff Kirsher const struct pci_device_id *entry) 2678874aeea5SJeff Kirsher { 2679874aeea5SJeff Kirsher struct net_device *net_dev; 2680874aeea5SJeff Kirsher struct efx_nic *efx; 2681fadac6aaSBen Hutchings int rc; 2682874aeea5SJeff Kirsher 2683874aeea5SJeff Kirsher /* Allocate and initialise a struct net_device and struct efx_nic */ 2684874aeea5SJeff Kirsher net_dev = alloc_etherdev_mqs(sizeof(*efx), EFX_MAX_CORE_TX_QUEUES, 2685874aeea5SJeff Kirsher EFX_MAX_RX_QUEUES); 2686874aeea5SJeff Kirsher if (!net_dev) 2687874aeea5SJeff Kirsher return -ENOMEM; 2688adeb15aaSBen Hutchings efx = netdev_priv(net_dev); 2689adeb15aaSBen Hutchings efx->type = (const struct efx_nic_type *) entry->driver_data; 2690adeb15aaSBen Hutchings net_dev->features |= (efx->type->offload_features | NETIF_F_SG | 2691874aeea5SJeff Kirsher NETIF_F_HIGHDMA | NETIF_F_TSO | 2692874aeea5SJeff Kirsher NETIF_F_RXCSUM); 2693adeb15aaSBen Hutchings if (efx->type->offload_features & NETIF_F_V6_CSUM) 2694874aeea5SJeff Kirsher net_dev->features |= NETIF_F_TSO6; 2695874aeea5SJeff Kirsher /* Mask for features that also apply to VLAN devices */ 2696874aeea5SJeff Kirsher net_dev->vlan_features |= (NETIF_F_ALL_CSUM | NETIF_F_SG | 2697874aeea5SJeff Kirsher NETIF_F_HIGHDMA | NETIF_F_ALL_TSO | 2698874aeea5SJeff Kirsher NETIF_F_RXCSUM); 2699874aeea5SJeff Kirsher /* All offloads can be toggled */ 2700874aeea5SJeff Kirsher net_dev->hw_features = net_dev->features & ~NETIF_F_HIGHDMA; 2701874aeea5SJeff Kirsher pci_set_drvdata(pci_dev, efx); 2702874aeea5SJeff Kirsher SET_NETDEV_DEV(net_dev, &pci_dev->dev); 2703adeb15aaSBen Hutchings rc = efx_init_struct(efx, pci_dev, net_dev); 2704874aeea5SJeff Kirsher if (rc) 2705874aeea5SJeff Kirsher goto fail1; 2706874aeea5SJeff Kirsher 2707874aeea5SJeff Kirsher netif_info(efx, probe, efx->net_dev, 2708874aeea5SJeff Kirsher "Solarflare NIC detected\n"); 2709874aeea5SJeff Kirsher 2710460eeaa0SBen Hutchings efx_print_product_vpd(efx); 2711460eeaa0SBen Hutchings 2712874aeea5SJeff Kirsher /* Set up basic I/O (BAR mappings etc) */ 2713874aeea5SJeff Kirsher rc = efx_init_io(efx); 2714874aeea5SJeff Kirsher if (rc) 2715874aeea5SJeff Kirsher goto fail2; 2716874aeea5SJeff Kirsher 2717874aeea5SJeff Kirsher rc = efx_pci_probe_main(efx); 2718fadac6aaSBen Hutchings if (rc) 2719874aeea5SJeff Kirsher goto fail3; 2720874aeea5SJeff Kirsher 2721874aeea5SJeff Kirsher rc = efx_register_netdev(efx); 2722874aeea5SJeff Kirsher if (rc) 2723fadac6aaSBen Hutchings goto fail4; 2724874aeea5SJeff Kirsher 2725cd2d5b52SBen Hutchings rc = efx_sriov_init(efx); 2726cd2d5b52SBen Hutchings if (rc) 2727cd2d5b52SBen Hutchings netif_err(efx, probe, efx->net_dev, 2728cd2d5b52SBen Hutchings "SR-IOV can't be enabled rc %d\n", rc); 2729cd2d5b52SBen Hutchings 2730874aeea5SJeff Kirsher netif_dbg(efx, probe, efx->net_dev, "initialisation successful\n"); 2731874aeea5SJeff Kirsher 27327c43161cSBen Hutchings /* Try to create MTDs, but allow this to fail */ 2733874aeea5SJeff Kirsher rtnl_lock(); 27347c43161cSBen Hutchings rc = efx_mtd_probe(efx); 2735874aeea5SJeff Kirsher rtnl_unlock(); 27367c43161cSBen Hutchings if (rc) 27377c43161cSBen Hutchings netif_warn(efx, probe, efx->net_dev, 27387c43161cSBen Hutchings "failed to create MTDs (%d)\n", rc); 27397c43161cSBen Hutchings 2740626950dbSAlexandre Rames rc = pci_enable_pcie_error_reporting(pci_dev); 2741626950dbSAlexandre Rames if (rc && rc != -EINVAL) 2742626950dbSAlexandre Rames netif_warn(efx, probe, efx->net_dev, 2743626950dbSAlexandre Rames "pci_enable_pcie_error_reporting failed (%d)\n", rc); 2744626950dbSAlexandre Rames 2745874aeea5SJeff Kirsher return 0; 2746874aeea5SJeff Kirsher 2747874aeea5SJeff Kirsher fail4: 2748fadac6aaSBen Hutchings efx_pci_remove_main(efx); 2749874aeea5SJeff Kirsher fail3: 2750874aeea5SJeff Kirsher efx_fini_io(efx); 2751874aeea5SJeff Kirsher fail2: 2752874aeea5SJeff Kirsher efx_fini_struct(efx); 2753874aeea5SJeff Kirsher fail1: 27543de4e301SBen Hutchings pci_set_drvdata(pci_dev, NULL); 2755874aeea5SJeff Kirsher WARN_ON(rc > 0); 2756874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "initialisation failed. rc=%d\n", rc); 2757874aeea5SJeff Kirsher free_netdev(net_dev); 2758874aeea5SJeff Kirsher return rc; 2759874aeea5SJeff Kirsher } 2760874aeea5SJeff Kirsher 2761874aeea5SJeff Kirsher static int efx_pm_freeze(struct device *dev) 2762874aeea5SJeff Kirsher { 2763874aeea5SJeff Kirsher struct efx_nic *efx = pci_get_drvdata(to_pci_dev(dev)); 2764874aeea5SJeff Kirsher 276561da026dSBen Hutchings rtnl_lock(); 276661da026dSBen Hutchings 27676032fb56SBen Hutchings if (efx->state != STATE_DISABLED) { 2768f16aeea0SBen Hutchings efx->state = STATE_UNINIT; 2769874aeea5SJeff Kirsher 2770c2f3b8e3SDaniel Pieczko efx_device_detach_sync(efx); 2771874aeea5SJeff Kirsher 2772874aeea5SJeff Kirsher efx_stop_all(efx); 2773d8291187SBen Hutchings efx_disable_interrupts(efx); 27746032fb56SBen Hutchings } 2775874aeea5SJeff Kirsher 277661da026dSBen Hutchings rtnl_unlock(); 277761da026dSBen Hutchings 2778874aeea5SJeff Kirsher return 0; 2779874aeea5SJeff Kirsher } 2780874aeea5SJeff Kirsher 2781874aeea5SJeff Kirsher static int efx_pm_thaw(struct device *dev) 2782874aeea5SJeff Kirsher { 2783874aeea5SJeff Kirsher struct efx_nic *efx = pci_get_drvdata(to_pci_dev(dev)); 2784874aeea5SJeff Kirsher 278561da026dSBen Hutchings rtnl_lock(); 278661da026dSBen Hutchings 27876032fb56SBen Hutchings if (efx->state != STATE_DISABLED) { 2788d8291187SBen Hutchings efx_enable_interrupts(efx); 2789874aeea5SJeff Kirsher 2790874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 2791874aeea5SJeff Kirsher efx->phy_op->reconfigure(efx); 2792874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 2793874aeea5SJeff Kirsher 2794874aeea5SJeff Kirsher efx_start_all(efx); 2795874aeea5SJeff Kirsher 2796874aeea5SJeff Kirsher netif_device_attach(efx->net_dev); 2797874aeea5SJeff Kirsher 2798f16aeea0SBen Hutchings efx->state = STATE_READY; 2799874aeea5SJeff Kirsher 2800874aeea5SJeff Kirsher efx->type->resume_wol(efx); 28016032fb56SBen Hutchings } 2802874aeea5SJeff Kirsher 280361da026dSBen Hutchings rtnl_unlock(); 280461da026dSBen Hutchings 2805874aeea5SJeff Kirsher /* Reschedule any quenched resets scheduled during efx_pm_freeze() */ 2806874aeea5SJeff Kirsher queue_work(reset_workqueue, &efx->reset_work); 2807874aeea5SJeff Kirsher 2808874aeea5SJeff Kirsher return 0; 2809874aeea5SJeff Kirsher } 2810874aeea5SJeff Kirsher 2811874aeea5SJeff Kirsher static int efx_pm_poweroff(struct device *dev) 2812874aeea5SJeff Kirsher { 2813874aeea5SJeff Kirsher struct pci_dev *pci_dev = to_pci_dev(dev); 2814874aeea5SJeff Kirsher struct efx_nic *efx = pci_get_drvdata(pci_dev); 2815874aeea5SJeff Kirsher 2816874aeea5SJeff Kirsher efx->type->fini(efx); 2817874aeea5SJeff Kirsher 2818874aeea5SJeff Kirsher efx->reset_pending = 0; 2819874aeea5SJeff Kirsher 2820874aeea5SJeff Kirsher pci_save_state(pci_dev); 2821874aeea5SJeff Kirsher return pci_set_power_state(pci_dev, PCI_D3hot); 2822874aeea5SJeff Kirsher } 2823874aeea5SJeff Kirsher 2824874aeea5SJeff Kirsher /* Used for both resume and restore */ 2825874aeea5SJeff Kirsher static int efx_pm_resume(struct device *dev) 2826874aeea5SJeff Kirsher { 2827874aeea5SJeff Kirsher struct pci_dev *pci_dev = to_pci_dev(dev); 2828874aeea5SJeff Kirsher struct efx_nic *efx = pci_get_drvdata(pci_dev); 2829874aeea5SJeff Kirsher int rc; 2830874aeea5SJeff Kirsher 2831874aeea5SJeff Kirsher rc = pci_set_power_state(pci_dev, PCI_D0); 2832874aeea5SJeff Kirsher if (rc) 2833874aeea5SJeff Kirsher return rc; 2834874aeea5SJeff Kirsher pci_restore_state(pci_dev); 2835874aeea5SJeff Kirsher rc = pci_enable_device(pci_dev); 2836874aeea5SJeff Kirsher if (rc) 2837874aeea5SJeff Kirsher return rc; 2838874aeea5SJeff Kirsher pci_set_master(efx->pci_dev); 2839874aeea5SJeff Kirsher rc = efx->type->reset(efx, RESET_TYPE_ALL); 2840874aeea5SJeff Kirsher if (rc) 2841874aeea5SJeff Kirsher return rc; 2842874aeea5SJeff Kirsher rc = efx->type->init(efx); 2843874aeea5SJeff Kirsher if (rc) 2844874aeea5SJeff Kirsher return rc; 2845874aeea5SJeff Kirsher efx_pm_thaw(dev); 2846874aeea5SJeff Kirsher return 0; 2847874aeea5SJeff Kirsher } 2848874aeea5SJeff Kirsher 2849874aeea5SJeff Kirsher static int efx_pm_suspend(struct device *dev) 2850874aeea5SJeff Kirsher { 2851874aeea5SJeff Kirsher int rc; 2852874aeea5SJeff Kirsher 2853874aeea5SJeff Kirsher efx_pm_freeze(dev); 2854874aeea5SJeff Kirsher rc = efx_pm_poweroff(dev); 2855874aeea5SJeff Kirsher if (rc) 2856874aeea5SJeff Kirsher efx_pm_resume(dev); 2857874aeea5SJeff Kirsher return rc; 2858874aeea5SJeff Kirsher } 2859874aeea5SJeff Kirsher 286018e83e4cSBen Hutchings static const struct dev_pm_ops efx_pm_ops = { 2861874aeea5SJeff Kirsher .suspend = efx_pm_suspend, 2862874aeea5SJeff Kirsher .resume = efx_pm_resume, 2863874aeea5SJeff Kirsher .freeze = efx_pm_freeze, 2864874aeea5SJeff Kirsher .thaw = efx_pm_thaw, 2865874aeea5SJeff Kirsher .poweroff = efx_pm_poweroff, 2866874aeea5SJeff Kirsher .restore = efx_pm_resume, 2867874aeea5SJeff Kirsher }; 2868874aeea5SJeff Kirsher 2869626950dbSAlexandre Rames /* A PCI error affecting this device was detected. 2870626950dbSAlexandre Rames * At this point MMIO and DMA may be disabled. 2871626950dbSAlexandre Rames * Stop the software path and request a slot reset. 2872626950dbSAlexandre Rames */ 2873debd0034Sstephen hemminger static pci_ers_result_t efx_io_error_detected(struct pci_dev *pdev, 2874626950dbSAlexandre Rames enum pci_channel_state state) 2875626950dbSAlexandre Rames { 2876626950dbSAlexandre Rames pci_ers_result_t status = PCI_ERS_RESULT_RECOVERED; 2877626950dbSAlexandre Rames struct efx_nic *efx = pci_get_drvdata(pdev); 2878626950dbSAlexandre Rames 2879626950dbSAlexandre Rames if (state == pci_channel_io_perm_failure) 2880626950dbSAlexandre Rames return PCI_ERS_RESULT_DISCONNECT; 2881626950dbSAlexandre Rames 2882626950dbSAlexandre Rames rtnl_lock(); 2883626950dbSAlexandre Rames 2884626950dbSAlexandre Rames if (efx->state != STATE_DISABLED) { 2885626950dbSAlexandre Rames efx->state = STATE_RECOVERY; 2886626950dbSAlexandre Rames efx->reset_pending = 0; 2887626950dbSAlexandre Rames 2888626950dbSAlexandre Rames efx_device_detach_sync(efx); 2889626950dbSAlexandre Rames 2890626950dbSAlexandre Rames efx_stop_all(efx); 2891d8291187SBen Hutchings efx_disable_interrupts(efx); 2892626950dbSAlexandre Rames 2893626950dbSAlexandre Rames status = PCI_ERS_RESULT_NEED_RESET; 2894626950dbSAlexandre Rames } else { 2895626950dbSAlexandre Rames /* If the interface is disabled we don't want to do anything 2896626950dbSAlexandre Rames * with it. 2897626950dbSAlexandre Rames */ 2898626950dbSAlexandre Rames status = PCI_ERS_RESULT_RECOVERED; 2899626950dbSAlexandre Rames } 2900626950dbSAlexandre Rames 2901626950dbSAlexandre Rames rtnl_unlock(); 2902626950dbSAlexandre Rames 2903626950dbSAlexandre Rames pci_disable_device(pdev); 2904626950dbSAlexandre Rames 2905626950dbSAlexandre Rames return status; 2906626950dbSAlexandre Rames } 2907626950dbSAlexandre Rames 2908626950dbSAlexandre Rames /* Fake a successfull reset, which will be performed later in efx_io_resume. */ 2909debd0034Sstephen hemminger static pci_ers_result_t efx_io_slot_reset(struct pci_dev *pdev) 2910626950dbSAlexandre Rames { 2911626950dbSAlexandre Rames struct efx_nic *efx = pci_get_drvdata(pdev); 2912626950dbSAlexandre Rames pci_ers_result_t status = PCI_ERS_RESULT_RECOVERED; 2913626950dbSAlexandre Rames int rc; 2914626950dbSAlexandre Rames 2915626950dbSAlexandre Rames if (pci_enable_device(pdev)) { 2916626950dbSAlexandre Rames netif_err(efx, hw, efx->net_dev, 2917626950dbSAlexandre Rames "Cannot re-enable PCI device after reset.\n"); 2918626950dbSAlexandre Rames status = PCI_ERS_RESULT_DISCONNECT; 2919626950dbSAlexandre Rames } 2920626950dbSAlexandre Rames 2921626950dbSAlexandre Rames rc = pci_cleanup_aer_uncorrect_error_status(pdev); 2922626950dbSAlexandre Rames if (rc) { 2923626950dbSAlexandre Rames netif_err(efx, hw, efx->net_dev, 2924626950dbSAlexandre Rames "pci_cleanup_aer_uncorrect_error_status failed (%d)\n", rc); 2925626950dbSAlexandre Rames /* Non-fatal error. Continue. */ 2926626950dbSAlexandre Rames } 2927626950dbSAlexandre Rames 2928626950dbSAlexandre Rames return status; 2929626950dbSAlexandre Rames } 2930626950dbSAlexandre Rames 2931626950dbSAlexandre Rames /* Perform the actual reset and resume I/O operations. */ 2932626950dbSAlexandre Rames static void efx_io_resume(struct pci_dev *pdev) 2933626950dbSAlexandre Rames { 2934626950dbSAlexandre Rames struct efx_nic *efx = pci_get_drvdata(pdev); 2935626950dbSAlexandre Rames int rc; 2936626950dbSAlexandre Rames 2937626950dbSAlexandre Rames rtnl_lock(); 2938626950dbSAlexandre Rames 2939626950dbSAlexandre Rames if (efx->state == STATE_DISABLED) 2940626950dbSAlexandre Rames goto out; 2941626950dbSAlexandre Rames 2942626950dbSAlexandre Rames rc = efx_reset(efx, RESET_TYPE_ALL); 2943626950dbSAlexandre Rames if (rc) { 2944626950dbSAlexandre Rames netif_err(efx, hw, efx->net_dev, 2945626950dbSAlexandre Rames "efx_reset failed after PCI error (%d)\n", rc); 2946626950dbSAlexandre Rames } else { 2947626950dbSAlexandre Rames efx->state = STATE_READY; 2948626950dbSAlexandre Rames netif_dbg(efx, hw, efx->net_dev, 2949626950dbSAlexandre Rames "Done resetting and resuming IO after PCI error.\n"); 2950626950dbSAlexandre Rames } 2951626950dbSAlexandre Rames 2952626950dbSAlexandre Rames out: 2953626950dbSAlexandre Rames rtnl_unlock(); 2954626950dbSAlexandre Rames } 2955626950dbSAlexandre Rames 2956626950dbSAlexandre Rames /* For simplicity and reliability, we always require a slot reset and try to 2957626950dbSAlexandre Rames * reset the hardware when a pci error affecting the device is detected. 2958626950dbSAlexandre Rames * We leave both the link_reset and mmio_enabled callback unimplemented: 2959626950dbSAlexandre Rames * with our request for slot reset the mmio_enabled callback will never be 2960626950dbSAlexandre Rames * called, and the link_reset callback is not used by AER or EEH mechanisms. 2961626950dbSAlexandre Rames */ 2962626950dbSAlexandre Rames static struct pci_error_handlers efx_err_handlers = { 2963626950dbSAlexandre Rames .error_detected = efx_io_error_detected, 2964626950dbSAlexandre Rames .slot_reset = efx_io_slot_reset, 2965626950dbSAlexandre Rames .resume = efx_io_resume, 2966626950dbSAlexandre Rames }; 2967626950dbSAlexandre Rames 2968874aeea5SJeff Kirsher static struct pci_driver efx_pci_driver = { 2969874aeea5SJeff Kirsher .name = KBUILD_MODNAME, 2970874aeea5SJeff Kirsher .id_table = efx_pci_table, 2971874aeea5SJeff Kirsher .probe = efx_pci_probe, 2972874aeea5SJeff Kirsher .remove = efx_pci_remove, 2973874aeea5SJeff Kirsher .driver.pm = &efx_pm_ops, 2974626950dbSAlexandre Rames .err_handler = &efx_err_handlers, 2975874aeea5SJeff Kirsher }; 2976874aeea5SJeff Kirsher 2977874aeea5SJeff Kirsher /************************************************************************** 2978874aeea5SJeff Kirsher * 2979874aeea5SJeff Kirsher * Kernel module interface 2980874aeea5SJeff Kirsher * 2981874aeea5SJeff Kirsher *************************************************************************/ 2982874aeea5SJeff Kirsher 2983874aeea5SJeff Kirsher module_param(interrupt_mode, uint, 0444); 2984874aeea5SJeff Kirsher MODULE_PARM_DESC(interrupt_mode, 2985874aeea5SJeff Kirsher "Interrupt mode (0=>MSIX 1=>MSI 2=>legacy)"); 2986874aeea5SJeff Kirsher 2987874aeea5SJeff Kirsher static int __init efx_init_module(void) 2988874aeea5SJeff Kirsher { 2989874aeea5SJeff Kirsher int rc; 2990874aeea5SJeff Kirsher 2991874aeea5SJeff Kirsher printk(KERN_INFO "Solarflare NET driver v" EFX_DRIVER_VERSION "\n"); 2992874aeea5SJeff Kirsher 2993874aeea5SJeff Kirsher rc = register_netdevice_notifier(&efx_netdev_notifier); 2994874aeea5SJeff Kirsher if (rc) 2995874aeea5SJeff Kirsher goto err_notifier; 2996874aeea5SJeff Kirsher 2997cd2d5b52SBen Hutchings rc = efx_init_sriov(); 2998cd2d5b52SBen Hutchings if (rc) 2999cd2d5b52SBen Hutchings goto err_sriov; 3000cd2d5b52SBen Hutchings 3001874aeea5SJeff Kirsher reset_workqueue = create_singlethread_workqueue("sfc_reset"); 3002874aeea5SJeff Kirsher if (!reset_workqueue) { 3003874aeea5SJeff Kirsher rc = -ENOMEM; 3004874aeea5SJeff Kirsher goto err_reset; 3005874aeea5SJeff Kirsher } 3006874aeea5SJeff Kirsher 3007874aeea5SJeff Kirsher rc = pci_register_driver(&efx_pci_driver); 3008874aeea5SJeff Kirsher if (rc < 0) 3009874aeea5SJeff Kirsher goto err_pci; 3010874aeea5SJeff Kirsher 3011874aeea5SJeff Kirsher return 0; 3012874aeea5SJeff Kirsher 3013874aeea5SJeff Kirsher err_pci: 3014874aeea5SJeff Kirsher destroy_workqueue(reset_workqueue); 3015874aeea5SJeff Kirsher err_reset: 3016cd2d5b52SBen Hutchings efx_fini_sriov(); 3017cd2d5b52SBen Hutchings err_sriov: 3018874aeea5SJeff Kirsher unregister_netdevice_notifier(&efx_netdev_notifier); 3019874aeea5SJeff Kirsher err_notifier: 3020874aeea5SJeff Kirsher return rc; 3021874aeea5SJeff Kirsher } 3022874aeea5SJeff Kirsher 3023874aeea5SJeff Kirsher static void __exit efx_exit_module(void) 3024874aeea5SJeff Kirsher { 3025874aeea5SJeff Kirsher printk(KERN_INFO "Solarflare NET driver unloading\n"); 3026874aeea5SJeff Kirsher 3027874aeea5SJeff Kirsher pci_unregister_driver(&efx_pci_driver); 3028874aeea5SJeff Kirsher destroy_workqueue(reset_workqueue); 3029cd2d5b52SBen Hutchings efx_fini_sriov(); 3030874aeea5SJeff Kirsher unregister_netdevice_notifier(&efx_netdev_notifier); 3031874aeea5SJeff Kirsher 3032874aeea5SJeff Kirsher } 3033874aeea5SJeff Kirsher 3034874aeea5SJeff Kirsher module_init(efx_init_module); 3035874aeea5SJeff Kirsher module_exit(efx_exit_module); 3036874aeea5SJeff Kirsher 3037874aeea5SJeff Kirsher MODULE_AUTHOR("Solarflare Communications and " 3038874aeea5SJeff Kirsher "Michael Brown <mbrown@fensystems.co.uk>"); 3039874aeea5SJeff Kirsher MODULE_DESCRIPTION("Solarflare Communications network driver"); 3040874aeea5SJeff Kirsher MODULE_LICENSE("GPL"); 3041874aeea5SJeff Kirsher MODULE_DEVICE_TABLE(pci, efx_pci_table); 3042