1874aeea5SJeff Kirsher /**************************************************************************** 2f7a6d2c4SBen Hutchings * Driver for Solarflare network controllers and boards 3874aeea5SJeff Kirsher * Copyright 2005-2006 Fen Systems Ltd. 4f7a6d2c4SBen Hutchings * Copyright 2005-2013 Solarflare Communications Inc. 5874aeea5SJeff Kirsher * 6874aeea5SJeff Kirsher * This program is free software; you can redistribute it and/or modify it 7874aeea5SJeff Kirsher * under the terms of the GNU General Public License version 2 as published 8874aeea5SJeff Kirsher * by the Free Software Foundation, incorporated herein by reference. 9874aeea5SJeff Kirsher */ 10874aeea5SJeff Kirsher 11874aeea5SJeff Kirsher #include <linux/module.h> 12874aeea5SJeff Kirsher #include <linux/pci.h> 13874aeea5SJeff Kirsher #include <linux/netdevice.h> 14874aeea5SJeff Kirsher #include <linux/etherdevice.h> 15874aeea5SJeff Kirsher #include <linux/delay.h> 16874aeea5SJeff Kirsher #include <linux/notifier.h> 17874aeea5SJeff Kirsher #include <linux/ip.h> 18874aeea5SJeff Kirsher #include <linux/tcp.h> 19874aeea5SJeff Kirsher #include <linux/in.h> 20874aeea5SJeff Kirsher #include <linux/ethtool.h> 21874aeea5SJeff Kirsher #include <linux/topology.h> 22874aeea5SJeff Kirsher #include <linux/gfp.h> 23626950dbSAlexandre Rames #include <linux/aer.h> 24b28405b0SAlexandre Rames #include <linux/interrupt.h> 25874aeea5SJeff Kirsher #include "net_driver.h" 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", 8674cd60a4SJon Cooper [RESET_TYPE_MC_BIST] = "MC_BIST", 87874aeea5SJeff Kirsher }; 88874aeea5SJeff Kirsher 89874aeea5SJeff Kirsher /* Reset workqueue. If any NIC has a hardware failure then a reset will be 90874aeea5SJeff Kirsher * queued onto this work queue. This is not a per-nic work queue, because 91874aeea5SJeff Kirsher * efx_reset_work() acquires the rtnl lock, so resets are naturally serialised. 92874aeea5SJeff Kirsher */ 93874aeea5SJeff Kirsher static struct workqueue_struct *reset_workqueue; 94874aeea5SJeff Kirsher 9574cd60a4SJon Cooper /* How often and how many times to poll for a reset while waiting for a 9674cd60a4SJon Cooper * BIST that another function started to complete. 9774cd60a4SJon Cooper */ 9874cd60a4SJon Cooper #define BIST_WAIT_DELAY_MS 100 9974cd60a4SJon Cooper #define BIST_WAIT_DELAY_COUNT 100 10074cd60a4SJon Cooper 101874aeea5SJeff Kirsher /************************************************************************** 102874aeea5SJeff Kirsher * 103874aeea5SJeff Kirsher * Configurable values 104874aeea5SJeff Kirsher * 105874aeea5SJeff Kirsher *************************************************************************/ 106874aeea5SJeff Kirsher 107874aeea5SJeff Kirsher /* 108874aeea5SJeff Kirsher * Use separate channels for TX and RX events 109874aeea5SJeff Kirsher * 110874aeea5SJeff Kirsher * Set this to 1 to use separate channels for TX and RX. It allows us 111874aeea5SJeff Kirsher * to control interrupt affinity separately for TX and RX. 112874aeea5SJeff Kirsher * 113874aeea5SJeff Kirsher * This is only used in MSI-X interrupt mode 114874aeea5SJeff Kirsher */ 115b9cc977dSBen Hutchings static bool separate_tx_channels; 116b9cc977dSBen Hutchings module_param(separate_tx_channels, bool, 0444); 117874aeea5SJeff Kirsher MODULE_PARM_DESC(separate_tx_channels, 118874aeea5SJeff Kirsher "Use separate channels for TX and RX"); 119874aeea5SJeff Kirsher 120874aeea5SJeff Kirsher /* This is the weight assigned to each of the (per-channel) virtual 121874aeea5SJeff Kirsher * NAPI devices. 122874aeea5SJeff Kirsher */ 123874aeea5SJeff Kirsher static int napi_weight = 64; 124874aeea5SJeff Kirsher 125874aeea5SJeff Kirsher /* This is the time (in jiffies) between invocations of the hardware 126626950dbSAlexandre Rames * monitor. 127626950dbSAlexandre Rames * On Falcon-based NICs, this will: 128874aeea5SJeff Kirsher * - Check the on-board hardware monitor; 129874aeea5SJeff Kirsher * - Poll the link state and reconfigure the hardware as necessary. 130626950dbSAlexandre Rames * On Siena-based NICs for power systems with EEH support, this will give EEH a 131626950dbSAlexandre Rames * chance to start. 132874aeea5SJeff Kirsher */ 133874aeea5SJeff Kirsher static unsigned int efx_monitor_interval = 1 * HZ; 134874aeea5SJeff Kirsher 135874aeea5SJeff Kirsher /* Initial interrupt moderation settings. They can be modified after 136874aeea5SJeff Kirsher * module load with ethtool. 137874aeea5SJeff Kirsher * 138874aeea5SJeff Kirsher * The default for RX should strike a balance between increasing the 139874aeea5SJeff Kirsher * round-trip latency and reducing overhead. 140874aeea5SJeff Kirsher */ 141874aeea5SJeff Kirsher static unsigned int rx_irq_mod_usec = 60; 142874aeea5SJeff Kirsher 143874aeea5SJeff Kirsher /* Initial interrupt moderation settings. They can be modified after 144874aeea5SJeff Kirsher * module load with ethtool. 145874aeea5SJeff Kirsher * 146874aeea5SJeff Kirsher * This default is chosen to ensure that a 10G link does not go idle 147874aeea5SJeff Kirsher * while a TX queue is stopped after it has become full. A queue is 148874aeea5SJeff Kirsher * restarted when it drops below half full. The time this takes (assuming 149874aeea5SJeff Kirsher * worst case 3 descriptors per packet and 1024 descriptors) is 150874aeea5SJeff Kirsher * 512 / 3 * 1.2 = 205 usec. 151874aeea5SJeff Kirsher */ 152874aeea5SJeff Kirsher static unsigned int tx_irq_mod_usec = 150; 153874aeea5SJeff Kirsher 154874aeea5SJeff Kirsher /* This is the first interrupt mode to try out of: 155874aeea5SJeff Kirsher * 0 => MSI-X 156874aeea5SJeff Kirsher * 1 => MSI 157874aeea5SJeff Kirsher * 2 => legacy 158874aeea5SJeff Kirsher */ 159874aeea5SJeff Kirsher static unsigned int interrupt_mode; 160874aeea5SJeff Kirsher 161874aeea5SJeff Kirsher /* This is the requested number of CPUs to use for Receive-Side Scaling (RSS), 162874aeea5SJeff Kirsher * i.e. the number of CPUs among which we may distribute simultaneous 163874aeea5SJeff Kirsher * interrupt handling. 164874aeea5SJeff Kirsher * 165874aeea5SJeff Kirsher * Cards without MSI-X will only target one CPU via legacy or MSI interrupt. 166cdb08f8fSBen Hutchings * The default (0) means to assign an interrupt to each core. 167874aeea5SJeff Kirsher */ 168874aeea5SJeff Kirsher static unsigned int rss_cpus; 169874aeea5SJeff Kirsher module_param(rss_cpus, uint, 0444); 170874aeea5SJeff Kirsher MODULE_PARM_DESC(rss_cpus, "Number of CPUs to use for Receive-Side Scaling"); 171874aeea5SJeff Kirsher 172b9cc977dSBen Hutchings static bool phy_flash_cfg; 173b9cc977dSBen Hutchings module_param(phy_flash_cfg, bool, 0644); 174874aeea5SJeff Kirsher MODULE_PARM_DESC(phy_flash_cfg, "Set PHYs into reflash mode initially"); 175874aeea5SJeff Kirsher 176e7bed9c8SBen Hutchings static unsigned irq_adapt_low_thresh = 8000; 177874aeea5SJeff Kirsher module_param(irq_adapt_low_thresh, uint, 0644); 178874aeea5SJeff Kirsher MODULE_PARM_DESC(irq_adapt_low_thresh, 179874aeea5SJeff Kirsher "Threshold score for reducing IRQ moderation"); 180874aeea5SJeff Kirsher 181e7bed9c8SBen Hutchings static unsigned irq_adapt_high_thresh = 16000; 182874aeea5SJeff Kirsher module_param(irq_adapt_high_thresh, uint, 0644); 183874aeea5SJeff Kirsher MODULE_PARM_DESC(irq_adapt_high_thresh, 184874aeea5SJeff Kirsher "Threshold score for increasing IRQ moderation"); 185874aeea5SJeff Kirsher 186874aeea5SJeff Kirsher static unsigned debug = (NETIF_MSG_DRV | NETIF_MSG_PROBE | 187874aeea5SJeff Kirsher NETIF_MSG_LINK | NETIF_MSG_IFDOWN | 188874aeea5SJeff Kirsher NETIF_MSG_IFUP | NETIF_MSG_RX_ERR | 189874aeea5SJeff Kirsher NETIF_MSG_TX_ERR | NETIF_MSG_HW); 190874aeea5SJeff Kirsher module_param(debug, uint, 0); 191874aeea5SJeff Kirsher MODULE_PARM_DESC(debug, "Bitmapped debugging message enable value"); 192874aeea5SJeff Kirsher 193874aeea5SJeff Kirsher /************************************************************************** 194874aeea5SJeff Kirsher * 195874aeea5SJeff Kirsher * Utility functions and prototypes 196874aeea5SJeff Kirsher * 197874aeea5SJeff Kirsher *************************************************************************/ 198874aeea5SJeff Kirsher 199261e4d96SJon Cooper static int efx_soft_enable_interrupts(struct efx_nic *efx); 200d8291187SBen Hutchings static void efx_soft_disable_interrupts(struct efx_nic *efx); 2017f967c01SBen Hutchings static void efx_remove_channel(struct efx_channel *channel); 202874aeea5SJeff Kirsher static void efx_remove_channels(struct efx_nic *efx); 2037f967c01SBen Hutchings static const struct efx_channel_type efx_default_channel_type; 204874aeea5SJeff Kirsher static void efx_remove_port(struct efx_nic *efx); 2057f967c01SBen Hutchings static void efx_init_napi_channel(struct efx_channel *channel); 206874aeea5SJeff Kirsher static void efx_fini_napi(struct efx_nic *efx); 207874aeea5SJeff Kirsher static void efx_fini_napi_channel(struct efx_channel *channel); 208874aeea5SJeff Kirsher static void efx_fini_struct(struct efx_nic *efx); 209874aeea5SJeff Kirsher static void efx_start_all(struct efx_nic *efx); 210874aeea5SJeff Kirsher static void efx_stop_all(struct efx_nic *efx); 211874aeea5SJeff Kirsher 212874aeea5SJeff Kirsher #define EFX_ASSERT_RESET_SERIALISED(efx) \ 213874aeea5SJeff Kirsher do { \ 214f16aeea0SBen Hutchings if ((efx->state == STATE_READY) || \ 215626950dbSAlexandre Rames (efx->state == STATE_RECOVERY) || \ 216874aeea5SJeff Kirsher (efx->state == STATE_DISABLED)) \ 217874aeea5SJeff Kirsher ASSERT_RTNL(); \ 218874aeea5SJeff Kirsher } while (0) 219874aeea5SJeff Kirsher 2208b7325b4SBen Hutchings static int efx_check_disabled(struct efx_nic *efx) 2218b7325b4SBen Hutchings { 222626950dbSAlexandre Rames if (efx->state == STATE_DISABLED || efx->state == STATE_RECOVERY) { 2238b7325b4SBen Hutchings netif_err(efx, drv, efx->net_dev, 2248b7325b4SBen Hutchings "device is disabled due to earlier errors\n"); 2258b7325b4SBen Hutchings return -EIO; 2268b7325b4SBen Hutchings } 2278b7325b4SBen Hutchings return 0; 2288b7325b4SBen Hutchings } 2298b7325b4SBen Hutchings 230874aeea5SJeff Kirsher /************************************************************************** 231874aeea5SJeff Kirsher * 232874aeea5SJeff Kirsher * Event queue processing 233874aeea5SJeff Kirsher * 234874aeea5SJeff Kirsher *************************************************************************/ 235874aeea5SJeff Kirsher 236874aeea5SJeff Kirsher /* Process channel's event queue 237874aeea5SJeff Kirsher * 238874aeea5SJeff Kirsher * This function is responsible for processing the event queue of a 239874aeea5SJeff Kirsher * single channel. The caller must guarantee that this function will 240874aeea5SJeff Kirsher * never be concurrently called more than once on the same channel, 241874aeea5SJeff Kirsher * though different channels may be being processed concurrently. 242874aeea5SJeff Kirsher */ 243874aeea5SJeff Kirsher static int efx_process_channel(struct efx_channel *channel, int budget) 244874aeea5SJeff Kirsher { 245874aeea5SJeff Kirsher int spent; 246874aeea5SJeff Kirsher 2479f2cb71cSBen Hutchings if (unlikely(!channel->enabled)) 248874aeea5SJeff Kirsher return 0; 249874aeea5SJeff Kirsher 250874aeea5SJeff Kirsher spent = efx_nic_process_eventq(channel, budget); 251d9ab7007SBen Hutchings if (spent && efx_channel_has_rx_queue(channel)) { 252d9ab7007SBen Hutchings struct efx_rx_queue *rx_queue = 253d9ab7007SBen Hutchings efx_channel_get_rx_queue(channel); 254874aeea5SJeff Kirsher 255ff734ef4SBen Hutchings efx_rx_flush_packet(channel); 256cce28794SJon Cooper efx_fast_push_rx_descriptors(rx_queue, true); 257d9ab7007SBen Hutchings } 258874aeea5SJeff Kirsher 259874aeea5SJeff Kirsher return spent; 260874aeea5SJeff Kirsher } 261874aeea5SJeff Kirsher 262874aeea5SJeff Kirsher /* NAPI poll handler 263874aeea5SJeff Kirsher * 264874aeea5SJeff Kirsher * NAPI guarantees serialisation of polls of the same device, which 265874aeea5SJeff Kirsher * provides the guarantee required by efx_process_channel(). 266874aeea5SJeff Kirsher */ 267874aeea5SJeff Kirsher static int efx_poll(struct napi_struct *napi, int budget) 268874aeea5SJeff Kirsher { 269874aeea5SJeff Kirsher struct efx_channel *channel = 270874aeea5SJeff Kirsher container_of(napi, struct efx_channel, napi_str); 271874aeea5SJeff Kirsher struct efx_nic *efx = channel->efx; 272874aeea5SJeff Kirsher int spent; 273874aeea5SJeff Kirsher 274874aeea5SJeff Kirsher netif_vdbg(efx, intr, efx->net_dev, 275874aeea5SJeff Kirsher "channel %d NAPI poll executing on CPU %d\n", 276874aeea5SJeff Kirsher channel->channel, raw_smp_processor_id()); 277874aeea5SJeff Kirsher 278874aeea5SJeff Kirsher spent = efx_process_channel(channel, budget); 279874aeea5SJeff Kirsher 280874aeea5SJeff Kirsher if (spent < budget) { 2819d9a6973SBen Hutchings if (efx_channel_has_rx_queue(channel) && 282874aeea5SJeff Kirsher efx->irq_rx_adaptive && 283874aeea5SJeff Kirsher unlikely(++channel->irq_count == 1000)) { 284874aeea5SJeff Kirsher if (unlikely(channel->irq_mod_score < 285874aeea5SJeff Kirsher irq_adapt_low_thresh)) { 286874aeea5SJeff Kirsher if (channel->irq_moderation > 1) { 287874aeea5SJeff Kirsher channel->irq_moderation -= 1; 288874aeea5SJeff Kirsher efx->type->push_irq_moderation(channel); 289874aeea5SJeff Kirsher } 290874aeea5SJeff Kirsher } else if (unlikely(channel->irq_mod_score > 291874aeea5SJeff Kirsher irq_adapt_high_thresh)) { 292874aeea5SJeff Kirsher if (channel->irq_moderation < 293874aeea5SJeff Kirsher efx->irq_rx_moderation) { 294874aeea5SJeff Kirsher channel->irq_moderation += 1; 295874aeea5SJeff Kirsher efx->type->push_irq_moderation(channel); 296874aeea5SJeff Kirsher } 297874aeea5SJeff Kirsher } 298874aeea5SJeff Kirsher channel->irq_count = 0; 299874aeea5SJeff Kirsher channel->irq_mod_score = 0; 300874aeea5SJeff Kirsher } 301874aeea5SJeff Kirsher 302874aeea5SJeff Kirsher efx_filter_rfs_expire(channel); 303874aeea5SJeff Kirsher 304874aeea5SJeff Kirsher /* There is no race here; although napi_disable() will 305874aeea5SJeff Kirsher * only wait for napi_complete(), this isn't a problem 306514bedbcSBen Hutchings * since efx_nic_eventq_read_ack() will have no effect if 307874aeea5SJeff Kirsher * interrupts have already been disabled. 308874aeea5SJeff Kirsher */ 309874aeea5SJeff Kirsher napi_complete(napi); 310514bedbcSBen Hutchings efx_nic_eventq_read_ack(channel); 311874aeea5SJeff Kirsher } 312874aeea5SJeff Kirsher 313874aeea5SJeff Kirsher return spent; 314874aeea5SJeff Kirsher } 315874aeea5SJeff Kirsher 316874aeea5SJeff Kirsher /* Create event queue 317874aeea5SJeff Kirsher * Event queue memory allocations are done only once. If the channel 318874aeea5SJeff Kirsher * is reset, the memory buffer will be reused; this guards against 319874aeea5SJeff Kirsher * errors during channel reset and also simplifies interrupt handling. 320874aeea5SJeff Kirsher */ 321874aeea5SJeff Kirsher static int efx_probe_eventq(struct efx_channel *channel) 322874aeea5SJeff Kirsher { 323874aeea5SJeff Kirsher struct efx_nic *efx = channel->efx; 324874aeea5SJeff Kirsher unsigned long entries; 325874aeea5SJeff Kirsher 32686ee5302SBen Hutchings netif_dbg(efx, probe, efx->net_dev, 327874aeea5SJeff Kirsher "chan %d create event queue\n", channel->channel); 328874aeea5SJeff Kirsher 329874aeea5SJeff Kirsher /* Build an event queue with room for one event per tx and rx buffer, 330874aeea5SJeff Kirsher * plus some extra for link state events and MCDI completions. */ 331874aeea5SJeff Kirsher entries = roundup_pow_of_two(efx->rxq_entries + efx->txq_entries + 128); 332874aeea5SJeff Kirsher EFX_BUG_ON_PARANOID(entries > EFX_MAX_EVQ_SIZE); 333874aeea5SJeff Kirsher channel->eventq_mask = max(entries, EFX_MIN_EVQ_SIZE) - 1; 334874aeea5SJeff Kirsher 335874aeea5SJeff Kirsher return efx_nic_probe_eventq(channel); 336874aeea5SJeff Kirsher } 337874aeea5SJeff Kirsher 338874aeea5SJeff Kirsher /* Prepare channel's event queue */ 339261e4d96SJon Cooper static int efx_init_eventq(struct efx_channel *channel) 340874aeea5SJeff Kirsher { 34115acb1ceSBen Hutchings struct efx_nic *efx = channel->efx; 342261e4d96SJon Cooper int rc; 343261e4d96SJon Cooper 344261e4d96SJon Cooper EFX_WARN_ON_PARANOID(channel->eventq_init); 345261e4d96SJon Cooper 34615acb1ceSBen Hutchings netif_dbg(efx, drv, efx->net_dev, 347874aeea5SJeff Kirsher "chan %d init event queue\n", channel->channel); 348874aeea5SJeff Kirsher 349261e4d96SJon Cooper rc = efx_nic_init_eventq(channel); 350261e4d96SJon Cooper if (rc == 0) { 35115acb1ceSBen Hutchings efx->type->push_irq_moderation(channel); 352874aeea5SJeff Kirsher channel->eventq_read_ptr = 0; 353be3fc09cSBen Hutchings channel->eventq_init = true; 354874aeea5SJeff Kirsher } 355261e4d96SJon Cooper return rc; 356261e4d96SJon Cooper } 357874aeea5SJeff Kirsher 3589f2cb71cSBen Hutchings /* Enable event queue processing and NAPI */ 3599f2cb71cSBen Hutchings static void efx_start_eventq(struct efx_channel *channel) 3609f2cb71cSBen Hutchings { 3619f2cb71cSBen Hutchings netif_dbg(channel->efx, ifup, channel->efx->net_dev, 3629f2cb71cSBen Hutchings "chan %d start event queue\n", channel->channel); 3639f2cb71cSBen Hutchings 364514bedbcSBen Hutchings /* Make sure the NAPI handler sees the enabled flag set */ 3659f2cb71cSBen Hutchings channel->enabled = true; 3669f2cb71cSBen Hutchings smp_wmb(); 3679f2cb71cSBen Hutchings 3689f2cb71cSBen Hutchings napi_enable(&channel->napi_str); 3699f2cb71cSBen Hutchings efx_nic_eventq_read_ack(channel); 3709f2cb71cSBen Hutchings } 3719f2cb71cSBen Hutchings 3729f2cb71cSBen Hutchings /* Disable event queue processing and NAPI */ 3739f2cb71cSBen Hutchings static void efx_stop_eventq(struct efx_channel *channel) 3749f2cb71cSBen Hutchings { 3759f2cb71cSBen Hutchings if (!channel->enabled) 3769f2cb71cSBen Hutchings return; 3779f2cb71cSBen Hutchings 3789f2cb71cSBen Hutchings napi_disable(&channel->napi_str); 3799f2cb71cSBen Hutchings channel->enabled = false; 3809f2cb71cSBen Hutchings } 3819f2cb71cSBen Hutchings 382874aeea5SJeff Kirsher static void efx_fini_eventq(struct efx_channel *channel) 383874aeea5SJeff Kirsher { 384be3fc09cSBen Hutchings if (!channel->eventq_init) 385be3fc09cSBen Hutchings return; 386be3fc09cSBen Hutchings 387874aeea5SJeff Kirsher netif_dbg(channel->efx, drv, channel->efx->net_dev, 388874aeea5SJeff Kirsher "chan %d fini event queue\n", channel->channel); 389874aeea5SJeff Kirsher 390874aeea5SJeff Kirsher efx_nic_fini_eventq(channel); 391be3fc09cSBen Hutchings channel->eventq_init = false; 392874aeea5SJeff Kirsher } 393874aeea5SJeff Kirsher 394874aeea5SJeff Kirsher static void efx_remove_eventq(struct efx_channel *channel) 395874aeea5SJeff Kirsher { 396874aeea5SJeff Kirsher netif_dbg(channel->efx, drv, channel->efx->net_dev, 397874aeea5SJeff Kirsher "chan %d remove event queue\n", channel->channel); 398874aeea5SJeff Kirsher 399874aeea5SJeff Kirsher efx_nic_remove_eventq(channel); 400874aeea5SJeff Kirsher } 401874aeea5SJeff Kirsher 402874aeea5SJeff Kirsher /************************************************************************** 403874aeea5SJeff Kirsher * 404874aeea5SJeff Kirsher * Channel handling 405874aeea5SJeff Kirsher * 406874aeea5SJeff Kirsher *************************************************************************/ 407874aeea5SJeff Kirsher 4087f967c01SBen Hutchings /* Allocate and initialise a channel structure. */ 409874aeea5SJeff Kirsher static struct efx_channel * 410874aeea5SJeff Kirsher efx_alloc_channel(struct efx_nic *efx, int i, struct efx_channel *old_channel) 411874aeea5SJeff Kirsher { 412874aeea5SJeff Kirsher struct efx_channel *channel; 413874aeea5SJeff Kirsher struct efx_rx_queue *rx_queue; 414874aeea5SJeff Kirsher struct efx_tx_queue *tx_queue; 415874aeea5SJeff Kirsher int j; 416874aeea5SJeff Kirsher 4177f967c01SBen Hutchings channel = kzalloc(sizeof(*channel), GFP_KERNEL); 4187f967c01SBen Hutchings if (!channel) 4197f967c01SBen Hutchings return NULL; 4207f967c01SBen Hutchings 4217f967c01SBen Hutchings channel->efx = efx; 4227f967c01SBen Hutchings channel->channel = i; 4237f967c01SBen Hutchings channel->type = &efx_default_channel_type; 4247f967c01SBen Hutchings 4257f967c01SBen Hutchings for (j = 0; j < EFX_TXQ_TYPES; j++) { 4267f967c01SBen Hutchings tx_queue = &channel->tx_queue[j]; 4277f967c01SBen Hutchings tx_queue->efx = efx; 4287f967c01SBen Hutchings tx_queue->queue = i * EFX_TXQ_TYPES + j; 4297f967c01SBen Hutchings tx_queue->channel = channel; 4307f967c01SBen Hutchings } 4317f967c01SBen Hutchings 4327f967c01SBen Hutchings rx_queue = &channel->rx_queue; 4337f967c01SBen Hutchings rx_queue->efx = efx; 4347f967c01SBen Hutchings setup_timer(&rx_queue->slow_fill, efx_rx_slow_fill, 4357f967c01SBen Hutchings (unsigned long)rx_queue); 4367f967c01SBen Hutchings 4377f967c01SBen Hutchings return channel; 4387f967c01SBen Hutchings } 4397f967c01SBen Hutchings 4407f967c01SBen Hutchings /* Allocate and initialise a channel structure, copying parameters 4417f967c01SBen Hutchings * (but not resources) from an old channel structure. 4427f967c01SBen Hutchings */ 4437f967c01SBen Hutchings static struct efx_channel * 4447f967c01SBen Hutchings efx_copy_channel(const struct efx_channel *old_channel) 4457f967c01SBen Hutchings { 4467f967c01SBen Hutchings struct efx_channel *channel; 4477f967c01SBen Hutchings struct efx_rx_queue *rx_queue; 4487f967c01SBen Hutchings struct efx_tx_queue *tx_queue; 4497f967c01SBen Hutchings int j; 4507f967c01SBen Hutchings 451874aeea5SJeff Kirsher channel = kmalloc(sizeof(*channel), GFP_KERNEL); 452874aeea5SJeff Kirsher if (!channel) 453874aeea5SJeff Kirsher return NULL; 454874aeea5SJeff Kirsher 455874aeea5SJeff Kirsher *channel = *old_channel; 456874aeea5SJeff Kirsher 457874aeea5SJeff Kirsher channel->napi_dev = NULL; 458874aeea5SJeff Kirsher memset(&channel->eventq, 0, sizeof(channel->eventq)); 459874aeea5SJeff Kirsher 460874aeea5SJeff Kirsher for (j = 0; j < EFX_TXQ_TYPES; j++) { 461874aeea5SJeff Kirsher tx_queue = &channel->tx_queue[j]; 462874aeea5SJeff Kirsher if (tx_queue->channel) 463874aeea5SJeff Kirsher tx_queue->channel = channel; 464874aeea5SJeff Kirsher tx_queue->buffer = NULL; 465874aeea5SJeff Kirsher memset(&tx_queue->txd, 0, sizeof(tx_queue->txd)); 466874aeea5SJeff Kirsher } 467874aeea5SJeff Kirsher 468874aeea5SJeff Kirsher rx_queue = &channel->rx_queue; 4697f967c01SBen Hutchings rx_queue->buffer = NULL; 4707f967c01SBen Hutchings memset(&rx_queue->rxd, 0, sizeof(rx_queue->rxd)); 471874aeea5SJeff Kirsher setup_timer(&rx_queue->slow_fill, efx_rx_slow_fill, 472874aeea5SJeff Kirsher (unsigned long)rx_queue); 473874aeea5SJeff Kirsher 474874aeea5SJeff Kirsher return channel; 475874aeea5SJeff Kirsher } 476874aeea5SJeff Kirsher 477874aeea5SJeff Kirsher static int efx_probe_channel(struct efx_channel *channel) 478874aeea5SJeff Kirsher { 479874aeea5SJeff Kirsher struct efx_tx_queue *tx_queue; 480874aeea5SJeff Kirsher struct efx_rx_queue *rx_queue; 481874aeea5SJeff Kirsher int rc; 482874aeea5SJeff Kirsher 483874aeea5SJeff Kirsher netif_dbg(channel->efx, probe, channel->efx->net_dev, 484874aeea5SJeff Kirsher "creating channel %d\n", channel->channel); 485874aeea5SJeff Kirsher 4867f967c01SBen Hutchings rc = channel->type->pre_probe(channel); 4877f967c01SBen Hutchings if (rc) 4887f967c01SBen Hutchings goto fail; 4897f967c01SBen Hutchings 490874aeea5SJeff Kirsher rc = efx_probe_eventq(channel); 491874aeea5SJeff Kirsher if (rc) 4927f967c01SBen Hutchings goto fail; 493874aeea5SJeff Kirsher 494874aeea5SJeff Kirsher efx_for_each_channel_tx_queue(tx_queue, channel) { 495874aeea5SJeff Kirsher rc = efx_probe_tx_queue(tx_queue); 496874aeea5SJeff Kirsher if (rc) 4977f967c01SBen Hutchings goto fail; 498874aeea5SJeff Kirsher } 499874aeea5SJeff Kirsher 500874aeea5SJeff Kirsher efx_for_each_channel_rx_queue(rx_queue, channel) { 501874aeea5SJeff Kirsher rc = efx_probe_rx_queue(rx_queue); 502874aeea5SJeff Kirsher if (rc) 5037f967c01SBen Hutchings goto fail; 504874aeea5SJeff Kirsher } 505874aeea5SJeff Kirsher 506874aeea5SJeff Kirsher channel->n_rx_frm_trunc = 0; 507874aeea5SJeff Kirsher 508874aeea5SJeff Kirsher return 0; 509874aeea5SJeff Kirsher 5107f967c01SBen Hutchings fail: 5117f967c01SBen Hutchings efx_remove_channel(channel); 512874aeea5SJeff Kirsher return rc; 513874aeea5SJeff Kirsher } 514874aeea5SJeff Kirsher 5157f967c01SBen Hutchings static void 5167f967c01SBen Hutchings efx_get_channel_name(struct efx_channel *channel, char *buf, size_t len) 5177f967c01SBen Hutchings { 5187f967c01SBen Hutchings struct efx_nic *efx = channel->efx; 5197f967c01SBen Hutchings const char *type; 5207f967c01SBen Hutchings int number; 5217f967c01SBen Hutchings 5227f967c01SBen Hutchings number = channel->channel; 5237f967c01SBen Hutchings if (efx->tx_channel_offset == 0) { 5247f967c01SBen Hutchings type = ""; 5257f967c01SBen Hutchings } else if (channel->channel < efx->tx_channel_offset) { 5267f967c01SBen Hutchings type = "-rx"; 5277f967c01SBen Hutchings } else { 5287f967c01SBen Hutchings type = "-tx"; 5297f967c01SBen Hutchings number -= efx->tx_channel_offset; 5307f967c01SBen Hutchings } 5317f967c01SBen Hutchings snprintf(buf, len, "%s%s-%d", efx->name, type, number); 5327f967c01SBen Hutchings } 533874aeea5SJeff Kirsher 534874aeea5SJeff Kirsher static void efx_set_channel_names(struct efx_nic *efx) 535874aeea5SJeff Kirsher { 536874aeea5SJeff Kirsher struct efx_channel *channel; 537874aeea5SJeff Kirsher 5387f967c01SBen Hutchings efx_for_each_channel(channel, efx) 5397f967c01SBen Hutchings channel->type->get_name(channel, 540d8291187SBen Hutchings efx->msi_context[channel->channel].name, 541d8291187SBen Hutchings sizeof(efx->msi_context[0].name)); 542874aeea5SJeff Kirsher } 543874aeea5SJeff Kirsher 544874aeea5SJeff Kirsher static int efx_probe_channels(struct efx_nic *efx) 545874aeea5SJeff Kirsher { 546874aeea5SJeff Kirsher struct efx_channel *channel; 547874aeea5SJeff Kirsher int rc; 548874aeea5SJeff Kirsher 549874aeea5SJeff Kirsher /* Restart special buffer allocation */ 550874aeea5SJeff Kirsher efx->next_buffer_table = 0; 551874aeea5SJeff Kirsher 552c92aaff1SBen Hutchings /* Probe channels in reverse, so that any 'extra' channels 553c92aaff1SBen Hutchings * use the start of the buffer table. This allows the traffic 554c92aaff1SBen Hutchings * channels to be resized without moving them or wasting the 555c92aaff1SBen Hutchings * entries before them. 556c92aaff1SBen Hutchings */ 557c92aaff1SBen Hutchings efx_for_each_channel_rev(channel, efx) { 558874aeea5SJeff Kirsher rc = efx_probe_channel(channel); 559874aeea5SJeff Kirsher if (rc) { 560874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 561874aeea5SJeff Kirsher "failed to create channel %d\n", 562874aeea5SJeff Kirsher channel->channel); 563874aeea5SJeff Kirsher goto fail; 564874aeea5SJeff Kirsher } 565874aeea5SJeff Kirsher } 566874aeea5SJeff Kirsher efx_set_channel_names(efx); 567874aeea5SJeff Kirsher 568874aeea5SJeff Kirsher return 0; 569874aeea5SJeff Kirsher 570874aeea5SJeff Kirsher fail: 571874aeea5SJeff Kirsher efx_remove_channels(efx); 572874aeea5SJeff Kirsher return rc; 573874aeea5SJeff Kirsher } 574874aeea5SJeff Kirsher 575874aeea5SJeff Kirsher /* Channels are shutdown and reinitialised whilst the NIC is running 576874aeea5SJeff Kirsher * to propagate configuration changes (mtu, checksum offload), or 577874aeea5SJeff Kirsher * to clear hardware error conditions 578874aeea5SJeff Kirsher */ 5799f2cb71cSBen Hutchings static void efx_start_datapath(struct efx_nic *efx) 580874aeea5SJeff Kirsher { 58185740cdfSBen Hutchings bool old_rx_scatter = efx->rx_scatter; 582874aeea5SJeff Kirsher struct efx_tx_queue *tx_queue; 583874aeea5SJeff Kirsher struct efx_rx_queue *rx_queue; 584874aeea5SJeff Kirsher struct efx_channel *channel; 58585740cdfSBen Hutchings size_t rx_buf_len; 586874aeea5SJeff Kirsher 587874aeea5SJeff Kirsher /* Calculate the rx buffer allocation parameters required to 588874aeea5SJeff Kirsher * support the current MTU, including padding for header 589874aeea5SJeff Kirsher * alignment and overruns. 590874aeea5SJeff Kirsher */ 59143a3739dSJon Cooper efx->rx_dma_len = (efx->rx_prefix_size + 592874aeea5SJeff Kirsher EFX_MAX_FRAME_LEN(efx->net_dev->mtu) + 593874aeea5SJeff Kirsher efx->type->rx_buffer_padding); 59485740cdfSBen Hutchings rx_buf_len = (sizeof(struct efx_rx_page_state) + 5952ec03014SAndrew Rybchenko efx->rx_ip_align + efx->rx_dma_len); 59685740cdfSBen Hutchings if (rx_buf_len <= PAGE_SIZE) { 597e8c68c0aSJon Cooper efx->rx_scatter = efx->type->always_rx_scatter; 59885740cdfSBen Hutchings efx->rx_buffer_order = 0; 59985740cdfSBen Hutchings } else if (efx->type->can_rx_scatter) { 600950c54dfSBen Hutchings BUILD_BUG_ON(EFX_RX_USR_BUF_SIZE % L1_CACHE_BYTES); 60185740cdfSBen Hutchings BUILD_BUG_ON(sizeof(struct efx_rx_page_state) + 602950c54dfSBen Hutchings 2 * ALIGN(NET_IP_ALIGN + EFX_RX_USR_BUF_SIZE, 603950c54dfSBen Hutchings EFX_RX_BUF_ALIGNMENT) > 604950c54dfSBen Hutchings PAGE_SIZE); 60585740cdfSBen Hutchings efx->rx_scatter = true; 60685740cdfSBen Hutchings efx->rx_dma_len = EFX_RX_USR_BUF_SIZE; 60785740cdfSBen Hutchings efx->rx_buffer_order = 0; 60885740cdfSBen Hutchings } else { 60985740cdfSBen Hutchings efx->rx_scatter = false; 61085740cdfSBen Hutchings efx->rx_buffer_order = get_order(rx_buf_len); 61185740cdfSBen Hutchings } 61285740cdfSBen Hutchings 6131648a23fSDaniel Pieczko efx_rx_config_page_split(efx); 6141648a23fSDaniel Pieczko if (efx->rx_buffer_order) 6151648a23fSDaniel Pieczko netif_dbg(efx, drv, efx->net_dev, 6161648a23fSDaniel Pieczko "RX buf len=%u; page order=%u batch=%u\n", 6171648a23fSDaniel Pieczko efx->rx_dma_len, efx->rx_buffer_order, 6181648a23fSDaniel Pieczko efx->rx_pages_per_batch); 6191648a23fSDaniel Pieczko else 6201648a23fSDaniel Pieczko netif_dbg(efx, drv, efx->net_dev, 6211648a23fSDaniel Pieczko "RX buf len=%u step=%u bpp=%u; page batch=%u\n", 6221648a23fSDaniel Pieczko efx->rx_dma_len, efx->rx_page_buf_step, 6231648a23fSDaniel Pieczko efx->rx_bufs_per_page, efx->rx_pages_per_batch); 6242768935aSDaniel Pieczko 625e8c68c0aSJon Cooper /* RX filters may also have scatter-enabled flags */ 62685740cdfSBen Hutchings if (efx->rx_scatter != old_rx_scatter) 627add72477SBen Hutchings efx->type->filter_update_rx_scatter(efx); 628874aeea5SJeff Kirsher 62914bf718fSBen Hutchings /* We must keep at least one descriptor in a TX ring empty. 63014bf718fSBen Hutchings * We could avoid this when the queue size does not exactly 63114bf718fSBen Hutchings * match the hardware ring size, but it's not that important. 63214bf718fSBen Hutchings * Therefore we stop the queue when one more skb might fill 63314bf718fSBen Hutchings * the ring completely. We wake it when half way back to 63414bf718fSBen Hutchings * empty. 63514bf718fSBen Hutchings */ 63614bf718fSBen Hutchings efx->txq_stop_thresh = efx->txq_entries - efx_tx_max_skb_descs(efx); 63714bf718fSBen Hutchings efx->txq_wake_thresh = efx->txq_stop_thresh / 2; 63814bf718fSBen Hutchings 639874aeea5SJeff Kirsher /* Initialise the channels */ 640874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) { 6413881d8abSAlexandre Rames efx_for_each_channel_tx_queue(tx_queue, channel) { 642874aeea5SJeff Kirsher efx_init_tx_queue(tx_queue); 6433881d8abSAlexandre Rames atomic_inc(&efx->active_queues); 6443881d8abSAlexandre Rames } 645874aeea5SJeff Kirsher 6469f2cb71cSBen Hutchings efx_for_each_channel_rx_queue(rx_queue, channel) { 647874aeea5SJeff Kirsher efx_init_rx_queue(rx_queue); 6483881d8abSAlexandre Rames atomic_inc(&efx->active_queues); 649cce28794SJon Cooper efx_stop_eventq(channel); 650cce28794SJon Cooper efx_fast_push_rx_descriptors(rx_queue, false); 651cce28794SJon Cooper efx_start_eventq(channel); 6529f2cb71cSBen Hutchings } 653874aeea5SJeff Kirsher 65485740cdfSBen Hutchings WARN_ON(channel->rx_pkt_n_frags); 655874aeea5SJeff Kirsher } 6569f2cb71cSBen Hutchings 6572ea4dc28SAlexandre Rames efx_ptp_start_datapath(efx); 6582ea4dc28SAlexandre Rames 6599f2cb71cSBen Hutchings if (netif_device_present(efx->net_dev)) 6609f2cb71cSBen Hutchings netif_tx_wake_all_queues(efx->net_dev); 661874aeea5SJeff Kirsher } 662874aeea5SJeff Kirsher 6639f2cb71cSBen Hutchings static void efx_stop_datapath(struct efx_nic *efx) 664874aeea5SJeff Kirsher { 665874aeea5SJeff Kirsher struct efx_channel *channel; 666874aeea5SJeff Kirsher struct efx_tx_queue *tx_queue; 667874aeea5SJeff Kirsher struct efx_rx_queue *rx_queue; 668874aeea5SJeff Kirsher int rc; 669874aeea5SJeff Kirsher 670874aeea5SJeff Kirsher EFX_ASSERT_RESET_SERIALISED(efx); 671874aeea5SJeff Kirsher BUG_ON(efx->port_enabled); 672874aeea5SJeff Kirsher 6732ea4dc28SAlexandre Rames efx_ptp_stop_datapath(efx); 6742ea4dc28SAlexandre Rames 675d8aec745SBen Hutchings /* Stop RX refill */ 676d8aec745SBen Hutchings efx_for_each_channel(channel, efx) { 677d8aec745SBen Hutchings efx_for_each_channel_rx_queue(rx_queue, channel) 678d8aec745SBen Hutchings rx_queue->refill_enabled = false; 679d8aec745SBen Hutchings } 680d8aec745SBen Hutchings 681874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) { 6829f2cb71cSBen Hutchings /* RX packet processing is pipelined, so wait for the 6839f2cb71cSBen Hutchings * NAPI handler to complete. At least event queue 0 6849f2cb71cSBen Hutchings * might be kept active by non-data events, so don't 6859f2cb71cSBen Hutchings * use napi_synchronize() but actually disable NAPI 6869f2cb71cSBen Hutchings * temporarily. 6879f2cb71cSBen Hutchings */ 6889f2cb71cSBen Hutchings if (efx_channel_has_rx_queue(channel)) { 6899f2cb71cSBen Hutchings efx_stop_eventq(channel); 6909f2cb71cSBen Hutchings efx_start_eventq(channel); 6919f2cb71cSBen Hutchings } 692e42c3d85SBen Hutchings } 693874aeea5SJeff Kirsher 694e42c3d85SBen Hutchings rc = efx->type->fini_dmaq(efx); 695e42c3d85SBen Hutchings if (rc && EFX_WORKAROUND_7803(efx)) { 696e42c3d85SBen Hutchings /* Schedule a reset to recover from the flush failure. The 697e42c3d85SBen Hutchings * descriptor caches reference memory we're about to free, 698e42c3d85SBen Hutchings * but falcon_reconfigure_mac_wrapper() won't reconnect 699e42c3d85SBen Hutchings * the MACs because of the pending reset. 700e42c3d85SBen Hutchings */ 701e42c3d85SBen Hutchings netif_err(efx, drv, efx->net_dev, 702e42c3d85SBen Hutchings "Resetting to recover from flush failure\n"); 703e42c3d85SBen Hutchings efx_schedule_reset(efx, RESET_TYPE_ALL); 704e42c3d85SBen Hutchings } else if (rc) { 705e42c3d85SBen Hutchings netif_err(efx, drv, efx->net_dev, "failed to flush queues\n"); 706e42c3d85SBen Hutchings } else { 707e42c3d85SBen Hutchings netif_dbg(efx, drv, efx->net_dev, 708e42c3d85SBen Hutchings "successfully flushed all queues\n"); 709e42c3d85SBen Hutchings } 710e42c3d85SBen Hutchings 711e42c3d85SBen Hutchings efx_for_each_channel(channel, efx) { 712874aeea5SJeff Kirsher efx_for_each_channel_rx_queue(rx_queue, channel) 713874aeea5SJeff Kirsher efx_fini_rx_queue(rx_queue); 714874aeea5SJeff Kirsher efx_for_each_possible_channel_tx_queue(tx_queue, channel) 715874aeea5SJeff Kirsher efx_fini_tx_queue(tx_queue); 716874aeea5SJeff Kirsher } 717874aeea5SJeff Kirsher } 718874aeea5SJeff Kirsher 719874aeea5SJeff Kirsher static void efx_remove_channel(struct efx_channel *channel) 720874aeea5SJeff Kirsher { 721874aeea5SJeff Kirsher struct efx_tx_queue *tx_queue; 722874aeea5SJeff Kirsher struct efx_rx_queue *rx_queue; 723874aeea5SJeff Kirsher 724874aeea5SJeff Kirsher netif_dbg(channel->efx, drv, channel->efx->net_dev, 725874aeea5SJeff Kirsher "destroy chan %d\n", channel->channel); 726874aeea5SJeff Kirsher 727874aeea5SJeff Kirsher efx_for_each_channel_rx_queue(rx_queue, channel) 728874aeea5SJeff Kirsher efx_remove_rx_queue(rx_queue); 729874aeea5SJeff Kirsher efx_for_each_possible_channel_tx_queue(tx_queue, channel) 730874aeea5SJeff Kirsher efx_remove_tx_queue(tx_queue); 731874aeea5SJeff Kirsher efx_remove_eventq(channel); 732c31e5f9fSStuart Hodgson channel->type->post_remove(channel); 733874aeea5SJeff Kirsher } 734874aeea5SJeff Kirsher 735874aeea5SJeff Kirsher static void efx_remove_channels(struct efx_nic *efx) 736874aeea5SJeff Kirsher { 737874aeea5SJeff Kirsher struct efx_channel *channel; 738874aeea5SJeff Kirsher 739874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) 740874aeea5SJeff Kirsher efx_remove_channel(channel); 741874aeea5SJeff Kirsher } 742874aeea5SJeff Kirsher 743874aeea5SJeff Kirsher int 744874aeea5SJeff Kirsher efx_realloc_channels(struct efx_nic *efx, u32 rxq_entries, u32 txq_entries) 745874aeea5SJeff Kirsher { 746874aeea5SJeff Kirsher struct efx_channel *other_channel[EFX_MAX_CHANNELS], *channel; 747874aeea5SJeff Kirsher u32 old_rxq_entries, old_txq_entries; 7487f967c01SBen Hutchings unsigned i, next_buffer_table = 0; 749261e4d96SJon Cooper int rc, rc2; 7508b7325b4SBen Hutchings 7518b7325b4SBen Hutchings rc = efx_check_disabled(efx); 7528b7325b4SBen Hutchings if (rc) 7538b7325b4SBen Hutchings return rc; 7547f967c01SBen Hutchings 7557f967c01SBen Hutchings /* Not all channels should be reallocated. We must avoid 7567f967c01SBen Hutchings * reallocating their buffer table entries. 7577f967c01SBen Hutchings */ 7587f967c01SBen Hutchings efx_for_each_channel(channel, efx) { 7597f967c01SBen Hutchings struct efx_rx_queue *rx_queue; 7607f967c01SBen Hutchings struct efx_tx_queue *tx_queue; 7617f967c01SBen Hutchings 7627f967c01SBen Hutchings if (channel->type->copy) 7637f967c01SBen Hutchings continue; 7647f967c01SBen Hutchings next_buffer_table = max(next_buffer_table, 7657f967c01SBen Hutchings channel->eventq.index + 7667f967c01SBen Hutchings channel->eventq.entries); 7677f967c01SBen Hutchings efx_for_each_channel_rx_queue(rx_queue, channel) 7687f967c01SBen Hutchings next_buffer_table = max(next_buffer_table, 7697f967c01SBen Hutchings rx_queue->rxd.index + 7707f967c01SBen Hutchings rx_queue->rxd.entries); 7717f967c01SBen Hutchings efx_for_each_channel_tx_queue(tx_queue, channel) 7727f967c01SBen Hutchings next_buffer_table = max(next_buffer_table, 7737f967c01SBen Hutchings tx_queue->txd.index + 7747f967c01SBen Hutchings tx_queue->txd.entries); 7757f967c01SBen Hutchings } 776874aeea5SJeff Kirsher 77729c69a48SBen Hutchings efx_device_detach_sync(efx); 778874aeea5SJeff Kirsher efx_stop_all(efx); 779d8291187SBen Hutchings efx_soft_disable_interrupts(efx); 780874aeea5SJeff Kirsher 7817f967c01SBen Hutchings /* Clone channels (where possible) */ 782874aeea5SJeff Kirsher memset(other_channel, 0, sizeof(other_channel)); 783874aeea5SJeff Kirsher for (i = 0; i < efx->n_channels; i++) { 7847f967c01SBen Hutchings channel = efx->channel[i]; 7857f967c01SBen Hutchings if (channel->type->copy) 7867f967c01SBen Hutchings channel = channel->type->copy(channel); 787874aeea5SJeff Kirsher if (!channel) { 788874aeea5SJeff Kirsher rc = -ENOMEM; 789874aeea5SJeff Kirsher goto out; 790874aeea5SJeff Kirsher } 791874aeea5SJeff Kirsher other_channel[i] = channel; 792874aeea5SJeff Kirsher } 793874aeea5SJeff Kirsher 794874aeea5SJeff Kirsher /* Swap entry counts and channel pointers */ 795874aeea5SJeff Kirsher old_rxq_entries = efx->rxq_entries; 796874aeea5SJeff Kirsher old_txq_entries = efx->txq_entries; 797874aeea5SJeff Kirsher efx->rxq_entries = rxq_entries; 798874aeea5SJeff Kirsher efx->txq_entries = txq_entries; 799874aeea5SJeff Kirsher for (i = 0; i < efx->n_channels; i++) { 800874aeea5SJeff Kirsher channel = efx->channel[i]; 801874aeea5SJeff Kirsher efx->channel[i] = other_channel[i]; 802874aeea5SJeff Kirsher other_channel[i] = channel; 803874aeea5SJeff Kirsher } 804874aeea5SJeff Kirsher 8057f967c01SBen Hutchings /* Restart buffer table allocation */ 8067f967c01SBen Hutchings efx->next_buffer_table = next_buffer_table; 8077f967c01SBen Hutchings 8087f967c01SBen Hutchings for (i = 0; i < efx->n_channels; i++) { 8097f967c01SBen Hutchings channel = efx->channel[i]; 8107f967c01SBen Hutchings if (!channel->type->copy) 8117f967c01SBen Hutchings continue; 8127f967c01SBen Hutchings rc = efx_probe_channel(channel); 813874aeea5SJeff Kirsher if (rc) 814874aeea5SJeff Kirsher goto rollback; 8157f967c01SBen Hutchings efx_init_napi_channel(efx->channel[i]); 816874aeea5SJeff Kirsher } 817874aeea5SJeff Kirsher 8187f967c01SBen Hutchings out: 8197f967c01SBen Hutchings /* Destroy unused channel structures */ 8207f967c01SBen Hutchings for (i = 0; i < efx->n_channels; i++) { 8217f967c01SBen Hutchings channel = other_channel[i]; 8227f967c01SBen Hutchings if (channel && channel->type->copy) { 8237f967c01SBen Hutchings efx_fini_napi_channel(channel); 8247f967c01SBen Hutchings efx_remove_channel(channel); 8257f967c01SBen Hutchings kfree(channel); 8267f967c01SBen Hutchings } 8277f967c01SBen Hutchings } 8287f967c01SBen Hutchings 829261e4d96SJon Cooper rc2 = efx_soft_enable_interrupts(efx); 830261e4d96SJon Cooper if (rc2) { 831261e4d96SJon Cooper rc = rc ? rc : rc2; 832261e4d96SJon Cooper netif_err(efx, drv, efx->net_dev, 833261e4d96SJon Cooper "unable to restart interrupts on channel reallocation\n"); 834261e4d96SJon Cooper efx_schedule_reset(efx, RESET_TYPE_DISABLE); 835261e4d96SJon Cooper } else { 836874aeea5SJeff Kirsher efx_start_all(efx); 83729c69a48SBen Hutchings netif_device_attach(efx->net_dev); 838261e4d96SJon Cooper } 839874aeea5SJeff Kirsher return rc; 840874aeea5SJeff Kirsher 841874aeea5SJeff Kirsher rollback: 842874aeea5SJeff Kirsher /* Swap back */ 843874aeea5SJeff Kirsher efx->rxq_entries = old_rxq_entries; 844874aeea5SJeff Kirsher efx->txq_entries = old_txq_entries; 845874aeea5SJeff Kirsher for (i = 0; i < efx->n_channels; i++) { 846874aeea5SJeff Kirsher channel = efx->channel[i]; 847874aeea5SJeff Kirsher efx->channel[i] = other_channel[i]; 848874aeea5SJeff Kirsher other_channel[i] = channel; 849874aeea5SJeff Kirsher } 850874aeea5SJeff Kirsher goto out; 851874aeea5SJeff Kirsher } 852874aeea5SJeff Kirsher 853874aeea5SJeff Kirsher void efx_schedule_slow_fill(struct efx_rx_queue *rx_queue) 854874aeea5SJeff Kirsher { 855874aeea5SJeff Kirsher mod_timer(&rx_queue->slow_fill, jiffies + msecs_to_jiffies(100)); 856874aeea5SJeff Kirsher } 857874aeea5SJeff Kirsher 8587f967c01SBen Hutchings static const struct efx_channel_type efx_default_channel_type = { 8597f967c01SBen Hutchings .pre_probe = efx_channel_dummy_op_int, 860c31e5f9fSStuart Hodgson .post_remove = efx_channel_dummy_op_void, 8617f967c01SBen Hutchings .get_name = efx_get_channel_name, 8627f967c01SBen Hutchings .copy = efx_copy_channel, 8637f967c01SBen Hutchings .keep_eventq = false, 8647f967c01SBen Hutchings }; 8657f967c01SBen Hutchings 8667f967c01SBen Hutchings int efx_channel_dummy_op_int(struct efx_channel *channel) 8677f967c01SBen Hutchings { 8687f967c01SBen Hutchings return 0; 8697f967c01SBen Hutchings } 8707f967c01SBen Hutchings 871c31e5f9fSStuart Hodgson void efx_channel_dummy_op_void(struct efx_channel *channel) 872c31e5f9fSStuart Hodgson { 873c31e5f9fSStuart Hodgson } 874c31e5f9fSStuart Hodgson 875874aeea5SJeff Kirsher /************************************************************************** 876874aeea5SJeff Kirsher * 877874aeea5SJeff Kirsher * Port handling 878874aeea5SJeff Kirsher * 879874aeea5SJeff Kirsher **************************************************************************/ 880874aeea5SJeff Kirsher 881874aeea5SJeff Kirsher /* This ensures that the kernel is kept informed (via 882874aeea5SJeff Kirsher * netif_carrier_on/off) of the link status, and also maintains the 883874aeea5SJeff Kirsher * link status's stop on the port's TX queue. 884874aeea5SJeff Kirsher */ 885874aeea5SJeff Kirsher void efx_link_status_changed(struct efx_nic *efx) 886874aeea5SJeff Kirsher { 887874aeea5SJeff Kirsher struct efx_link_state *link_state = &efx->link_state; 888874aeea5SJeff Kirsher 889874aeea5SJeff Kirsher /* SFC Bug 5356: A net_dev notifier is registered, so we must ensure 890874aeea5SJeff Kirsher * that no events are triggered between unregister_netdev() and the 891874aeea5SJeff Kirsher * driver unloading. A more general condition is that NETDEV_CHANGE 892874aeea5SJeff Kirsher * can only be generated between NETDEV_UP and NETDEV_DOWN */ 893874aeea5SJeff Kirsher if (!netif_running(efx->net_dev)) 894874aeea5SJeff Kirsher return; 895874aeea5SJeff Kirsher 896874aeea5SJeff Kirsher if (link_state->up != netif_carrier_ok(efx->net_dev)) { 897874aeea5SJeff Kirsher efx->n_link_state_changes++; 898874aeea5SJeff Kirsher 899874aeea5SJeff Kirsher if (link_state->up) 900874aeea5SJeff Kirsher netif_carrier_on(efx->net_dev); 901874aeea5SJeff Kirsher else 902874aeea5SJeff Kirsher netif_carrier_off(efx->net_dev); 903874aeea5SJeff Kirsher } 904874aeea5SJeff Kirsher 905874aeea5SJeff Kirsher /* Status message for kernel log */ 9062aa9ef11SBen Hutchings if (link_state->up) 907874aeea5SJeff Kirsher netif_info(efx, link, efx->net_dev, 908964e6135SBen Hutchings "link up at %uMbps %s-duplex (MTU %d)\n", 909874aeea5SJeff Kirsher link_state->speed, link_state->fd ? "full" : "half", 910964e6135SBen Hutchings efx->net_dev->mtu); 9112aa9ef11SBen Hutchings else 912874aeea5SJeff Kirsher netif_info(efx, link, efx->net_dev, "link down\n"); 913874aeea5SJeff Kirsher } 914874aeea5SJeff Kirsher 915874aeea5SJeff Kirsher void efx_link_set_advertising(struct efx_nic *efx, u32 advertising) 916874aeea5SJeff Kirsher { 917874aeea5SJeff Kirsher efx->link_advertising = advertising; 918874aeea5SJeff Kirsher if (advertising) { 919874aeea5SJeff Kirsher if (advertising & ADVERTISED_Pause) 920874aeea5SJeff Kirsher efx->wanted_fc |= (EFX_FC_TX | EFX_FC_RX); 921874aeea5SJeff Kirsher else 922874aeea5SJeff Kirsher efx->wanted_fc &= ~(EFX_FC_TX | EFX_FC_RX); 923874aeea5SJeff Kirsher if (advertising & ADVERTISED_Asym_Pause) 924874aeea5SJeff Kirsher efx->wanted_fc ^= EFX_FC_TX; 925874aeea5SJeff Kirsher } 926874aeea5SJeff Kirsher } 927874aeea5SJeff Kirsher 928874aeea5SJeff Kirsher void efx_link_set_wanted_fc(struct efx_nic *efx, u8 wanted_fc) 929874aeea5SJeff Kirsher { 930874aeea5SJeff Kirsher efx->wanted_fc = wanted_fc; 931874aeea5SJeff Kirsher if (efx->link_advertising) { 932874aeea5SJeff Kirsher if (wanted_fc & EFX_FC_RX) 933874aeea5SJeff Kirsher efx->link_advertising |= (ADVERTISED_Pause | 934874aeea5SJeff Kirsher ADVERTISED_Asym_Pause); 935874aeea5SJeff Kirsher else 936874aeea5SJeff Kirsher efx->link_advertising &= ~(ADVERTISED_Pause | 937874aeea5SJeff Kirsher ADVERTISED_Asym_Pause); 938874aeea5SJeff Kirsher if (wanted_fc & EFX_FC_TX) 939874aeea5SJeff Kirsher efx->link_advertising ^= ADVERTISED_Asym_Pause; 940874aeea5SJeff Kirsher } 941874aeea5SJeff Kirsher } 942874aeea5SJeff Kirsher 943874aeea5SJeff Kirsher static void efx_fini_port(struct efx_nic *efx); 944874aeea5SJeff Kirsher 945874aeea5SJeff Kirsher /* Push loopback/power/transmit disable settings to the PHY, and reconfigure 946874aeea5SJeff Kirsher * the MAC appropriately. All other PHY configuration changes are pushed 947874aeea5SJeff Kirsher * through phy_op->set_settings(), and pushed asynchronously to the MAC 948874aeea5SJeff Kirsher * through efx_monitor(). 949874aeea5SJeff Kirsher * 950874aeea5SJeff Kirsher * Callers must hold the mac_lock 951874aeea5SJeff Kirsher */ 952874aeea5SJeff Kirsher int __efx_reconfigure_port(struct efx_nic *efx) 953874aeea5SJeff Kirsher { 954874aeea5SJeff Kirsher enum efx_phy_mode phy_mode; 955874aeea5SJeff Kirsher int rc; 956874aeea5SJeff Kirsher 957874aeea5SJeff Kirsher WARN_ON(!mutex_is_locked(&efx->mac_lock)); 958874aeea5SJeff Kirsher 959874aeea5SJeff Kirsher /* Disable PHY transmit in mac level loopbacks */ 960874aeea5SJeff Kirsher phy_mode = efx->phy_mode; 961874aeea5SJeff Kirsher if (LOOPBACK_INTERNAL(efx)) 962874aeea5SJeff Kirsher efx->phy_mode |= PHY_MODE_TX_DISABLED; 963874aeea5SJeff Kirsher else 964874aeea5SJeff Kirsher efx->phy_mode &= ~PHY_MODE_TX_DISABLED; 965874aeea5SJeff Kirsher 966874aeea5SJeff Kirsher rc = efx->type->reconfigure_port(efx); 967874aeea5SJeff Kirsher 968874aeea5SJeff Kirsher if (rc) 969874aeea5SJeff Kirsher efx->phy_mode = phy_mode; 970874aeea5SJeff Kirsher 971874aeea5SJeff Kirsher return rc; 972874aeea5SJeff Kirsher } 973874aeea5SJeff Kirsher 974874aeea5SJeff Kirsher /* Reinitialise the MAC to pick up new PHY settings, even if the port is 975874aeea5SJeff Kirsher * disabled. */ 976874aeea5SJeff Kirsher int efx_reconfigure_port(struct efx_nic *efx) 977874aeea5SJeff Kirsher { 978874aeea5SJeff Kirsher int rc; 979874aeea5SJeff Kirsher 980874aeea5SJeff Kirsher EFX_ASSERT_RESET_SERIALISED(efx); 981874aeea5SJeff Kirsher 982874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 983874aeea5SJeff Kirsher rc = __efx_reconfigure_port(efx); 984874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 985874aeea5SJeff Kirsher 986874aeea5SJeff Kirsher return rc; 987874aeea5SJeff Kirsher } 988874aeea5SJeff Kirsher 989874aeea5SJeff Kirsher /* Asynchronous work item for changing MAC promiscuity and multicast 990874aeea5SJeff Kirsher * hash. Avoid a drain/rx_ingress enable by reconfiguring the current 991874aeea5SJeff Kirsher * MAC directly. */ 992874aeea5SJeff Kirsher static void efx_mac_work(struct work_struct *data) 993874aeea5SJeff Kirsher { 994874aeea5SJeff Kirsher struct efx_nic *efx = container_of(data, struct efx_nic, mac_work); 995874aeea5SJeff Kirsher 996874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 99730b81cdaSBen Hutchings if (efx->port_enabled) 998710b208dSBen Hutchings efx->type->reconfigure_mac(efx); 999874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 1000874aeea5SJeff Kirsher } 1001874aeea5SJeff Kirsher 1002874aeea5SJeff Kirsher static int efx_probe_port(struct efx_nic *efx) 1003874aeea5SJeff Kirsher { 1004874aeea5SJeff Kirsher int rc; 1005874aeea5SJeff Kirsher 1006874aeea5SJeff Kirsher netif_dbg(efx, probe, efx->net_dev, "create port\n"); 1007874aeea5SJeff Kirsher 1008874aeea5SJeff Kirsher if (phy_flash_cfg) 1009874aeea5SJeff Kirsher efx->phy_mode = PHY_MODE_SPECIAL; 1010874aeea5SJeff Kirsher 1011874aeea5SJeff Kirsher /* Connect up MAC/PHY operations table */ 1012874aeea5SJeff Kirsher rc = efx->type->probe_port(efx); 1013874aeea5SJeff Kirsher if (rc) 1014874aeea5SJeff Kirsher return rc; 1015874aeea5SJeff Kirsher 1016e332bcb3SBen Hutchings /* Initialise MAC address to permanent address */ 1017e332bcb3SBen Hutchings memcpy(efx->net_dev->dev_addr, efx->net_dev->perm_addr, ETH_ALEN); 1018874aeea5SJeff Kirsher 1019874aeea5SJeff Kirsher return 0; 1020874aeea5SJeff Kirsher } 1021874aeea5SJeff Kirsher 1022874aeea5SJeff Kirsher static int efx_init_port(struct efx_nic *efx) 1023874aeea5SJeff Kirsher { 1024874aeea5SJeff Kirsher int rc; 1025874aeea5SJeff Kirsher 1026874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "init port\n"); 1027874aeea5SJeff Kirsher 1028874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 1029874aeea5SJeff Kirsher 1030874aeea5SJeff Kirsher rc = efx->phy_op->init(efx); 1031874aeea5SJeff Kirsher if (rc) 1032874aeea5SJeff Kirsher goto fail1; 1033874aeea5SJeff Kirsher 1034874aeea5SJeff Kirsher efx->port_initialized = true; 1035874aeea5SJeff Kirsher 1036874aeea5SJeff Kirsher /* Reconfigure the MAC before creating dma queues (required for 1037874aeea5SJeff Kirsher * Falcon/A1 where RX_INGR_EN/TX_DRAIN_EN isn't supported) */ 1038710b208dSBen Hutchings efx->type->reconfigure_mac(efx); 1039874aeea5SJeff Kirsher 1040874aeea5SJeff Kirsher /* Ensure the PHY advertises the correct flow control settings */ 1041874aeea5SJeff Kirsher rc = efx->phy_op->reconfigure(efx); 1042874aeea5SJeff Kirsher if (rc) 1043874aeea5SJeff Kirsher goto fail2; 1044874aeea5SJeff Kirsher 1045874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 1046874aeea5SJeff Kirsher return 0; 1047874aeea5SJeff Kirsher 1048874aeea5SJeff Kirsher fail2: 1049874aeea5SJeff Kirsher efx->phy_op->fini(efx); 1050874aeea5SJeff Kirsher fail1: 1051874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 1052874aeea5SJeff Kirsher return rc; 1053874aeea5SJeff Kirsher } 1054874aeea5SJeff Kirsher 1055874aeea5SJeff Kirsher static void efx_start_port(struct efx_nic *efx) 1056874aeea5SJeff Kirsher { 1057874aeea5SJeff Kirsher netif_dbg(efx, ifup, efx->net_dev, "start port\n"); 1058874aeea5SJeff Kirsher BUG_ON(efx->port_enabled); 1059874aeea5SJeff Kirsher 1060874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 1061874aeea5SJeff Kirsher efx->port_enabled = true; 1062874aeea5SJeff Kirsher 1063d615c039SBen Hutchings /* Ensure MAC ingress/egress is enabled */ 1064710b208dSBen Hutchings efx->type->reconfigure_mac(efx); 1065874aeea5SJeff Kirsher 1066874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 1067874aeea5SJeff Kirsher } 1068874aeea5SJeff Kirsher 1069d615c039SBen Hutchings /* Cancel work for MAC reconfiguration, periodic hardware monitoring 1070d615c039SBen Hutchings * and the async self-test, wait for them to finish and prevent them 1071d615c039SBen Hutchings * being scheduled again. This doesn't cover online resets, which 1072d615c039SBen Hutchings * should only be cancelled when removing the device. 1073d615c039SBen Hutchings */ 1074874aeea5SJeff Kirsher static void efx_stop_port(struct efx_nic *efx) 1075874aeea5SJeff Kirsher { 1076874aeea5SJeff Kirsher netif_dbg(efx, ifdown, efx->net_dev, "stop port\n"); 1077874aeea5SJeff Kirsher 1078d615c039SBen Hutchings EFX_ASSERT_RESET_SERIALISED(efx); 1079d615c039SBen Hutchings 1080874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 1081874aeea5SJeff Kirsher efx->port_enabled = false; 1082874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 1083874aeea5SJeff Kirsher 1084874aeea5SJeff Kirsher /* Serialise against efx_set_multicast_list() */ 1085874aeea5SJeff Kirsher netif_addr_lock_bh(efx->net_dev); 1086874aeea5SJeff Kirsher netif_addr_unlock_bh(efx->net_dev); 1087d615c039SBen Hutchings 1088d615c039SBen Hutchings cancel_delayed_work_sync(&efx->monitor_work); 1089d615c039SBen Hutchings efx_selftest_async_cancel(efx); 1090d615c039SBen Hutchings cancel_work_sync(&efx->mac_work); 1091874aeea5SJeff Kirsher } 1092874aeea5SJeff Kirsher 1093874aeea5SJeff Kirsher static void efx_fini_port(struct efx_nic *efx) 1094874aeea5SJeff Kirsher { 1095874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "shut down port\n"); 1096874aeea5SJeff Kirsher 1097874aeea5SJeff Kirsher if (!efx->port_initialized) 1098874aeea5SJeff Kirsher return; 1099874aeea5SJeff Kirsher 1100874aeea5SJeff Kirsher efx->phy_op->fini(efx); 1101874aeea5SJeff Kirsher efx->port_initialized = false; 1102874aeea5SJeff Kirsher 1103874aeea5SJeff Kirsher efx->link_state.up = false; 1104874aeea5SJeff Kirsher efx_link_status_changed(efx); 1105874aeea5SJeff Kirsher } 1106874aeea5SJeff Kirsher 1107874aeea5SJeff Kirsher static void efx_remove_port(struct efx_nic *efx) 1108874aeea5SJeff Kirsher { 1109874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "destroying port\n"); 1110874aeea5SJeff Kirsher 1111874aeea5SJeff Kirsher efx->type->remove_port(efx); 1112874aeea5SJeff Kirsher } 1113874aeea5SJeff Kirsher 1114874aeea5SJeff Kirsher /************************************************************************** 1115874aeea5SJeff Kirsher * 1116874aeea5SJeff Kirsher * NIC handling 1117874aeea5SJeff Kirsher * 1118874aeea5SJeff Kirsher **************************************************************************/ 1119874aeea5SJeff Kirsher 11200bcf4a64SBen Hutchings static LIST_HEAD(efx_primary_list); 11210bcf4a64SBen Hutchings static LIST_HEAD(efx_unassociated_list); 11220bcf4a64SBen Hutchings 11230bcf4a64SBen Hutchings static bool efx_same_controller(struct efx_nic *left, struct efx_nic *right) 11240bcf4a64SBen Hutchings { 11250bcf4a64SBen Hutchings return left->type == right->type && 11260bcf4a64SBen Hutchings left->vpd_sn && right->vpd_sn && 11270bcf4a64SBen Hutchings !strcmp(left->vpd_sn, right->vpd_sn); 11280bcf4a64SBen Hutchings } 11290bcf4a64SBen Hutchings 11300bcf4a64SBen Hutchings static void efx_associate(struct efx_nic *efx) 11310bcf4a64SBen Hutchings { 11320bcf4a64SBen Hutchings struct efx_nic *other, *next; 11330bcf4a64SBen Hutchings 11340bcf4a64SBen Hutchings if (efx->primary == efx) { 11350bcf4a64SBen Hutchings /* Adding primary function; look for secondaries */ 11360bcf4a64SBen Hutchings 11370bcf4a64SBen Hutchings netif_dbg(efx, probe, efx->net_dev, "adding to primary list\n"); 11380bcf4a64SBen Hutchings list_add_tail(&efx->node, &efx_primary_list); 11390bcf4a64SBen Hutchings 11400bcf4a64SBen Hutchings list_for_each_entry_safe(other, next, &efx_unassociated_list, 11410bcf4a64SBen Hutchings node) { 11420bcf4a64SBen Hutchings if (efx_same_controller(efx, other)) { 11430bcf4a64SBen Hutchings list_del(&other->node); 11440bcf4a64SBen Hutchings netif_dbg(other, probe, other->net_dev, 11450bcf4a64SBen Hutchings "moving to secondary list of %s %s\n", 11460bcf4a64SBen Hutchings pci_name(efx->pci_dev), 11470bcf4a64SBen Hutchings efx->net_dev->name); 11480bcf4a64SBen Hutchings list_add_tail(&other->node, 11490bcf4a64SBen Hutchings &efx->secondary_list); 11500bcf4a64SBen Hutchings other->primary = efx; 11510bcf4a64SBen Hutchings } 11520bcf4a64SBen Hutchings } 11530bcf4a64SBen Hutchings } else { 11540bcf4a64SBen Hutchings /* Adding secondary function; look for primary */ 11550bcf4a64SBen Hutchings 11560bcf4a64SBen Hutchings list_for_each_entry(other, &efx_primary_list, node) { 11570bcf4a64SBen Hutchings if (efx_same_controller(efx, other)) { 11580bcf4a64SBen Hutchings netif_dbg(efx, probe, efx->net_dev, 11590bcf4a64SBen Hutchings "adding to secondary list of %s %s\n", 11600bcf4a64SBen Hutchings pci_name(other->pci_dev), 11610bcf4a64SBen Hutchings other->net_dev->name); 11620bcf4a64SBen Hutchings list_add_tail(&efx->node, 11630bcf4a64SBen Hutchings &other->secondary_list); 11640bcf4a64SBen Hutchings efx->primary = other; 11650bcf4a64SBen Hutchings return; 11660bcf4a64SBen Hutchings } 11670bcf4a64SBen Hutchings } 11680bcf4a64SBen Hutchings 11690bcf4a64SBen Hutchings netif_dbg(efx, probe, efx->net_dev, 11700bcf4a64SBen Hutchings "adding to unassociated list\n"); 11710bcf4a64SBen Hutchings list_add_tail(&efx->node, &efx_unassociated_list); 11720bcf4a64SBen Hutchings } 11730bcf4a64SBen Hutchings } 11740bcf4a64SBen Hutchings 11750bcf4a64SBen Hutchings static void efx_dissociate(struct efx_nic *efx) 11760bcf4a64SBen Hutchings { 11770bcf4a64SBen Hutchings struct efx_nic *other, *next; 11780bcf4a64SBen Hutchings 11790bcf4a64SBen Hutchings list_del(&efx->node); 11800bcf4a64SBen Hutchings efx->primary = NULL; 11810bcf4a64SBen Hutchings 11820bcf4a64SBen Hutchings list_for_each_entry_safe(other, next, &efx->secondary_list, node) { 11830bcf4a64SBen Hutchings list_del(&other->node); 11840bcf4a64SBen Hutchings netif_dbg(other, probe, other->net_dev, 11850bcf4a64SBen Hutchings "moving to unassociated list\n"); 11860bcf4a64SBen Hutchings list_add_tail(&other->node, &efx_unassociated_list); 11870bcf4a64SBen Hutchings other->primary = NULL; 11880bcf4a64SBen Hutchings } 11890bcf4a64SBen Hutchings } 11900bcf4a64SBen Hutchings 1191874aeea5SJeff Kirsher /* This configures the PCI device to enable I/O and DMA. */ 1192874aeea5SJeff Kirsher static int efx_init_io(struct efx_nic *efx) 1193874aeea5SJeff Kirsher { 1194874aeea5SJeff Kirsher struct pci_dev *pci_dev = efx->pci_dev; 1195874aeea5SJeff Kirsher dma_addr_t dma_mask = efx->type->max_dma_mask; 1196b105798fSBen Hutchings unsigned int mem_map_size = efx->type->mem_map_size(efx); 1197874aeea5SJeff Kirsher int rc; 1198874aeea5SJeff Kirsher 1199874aeea5SJeff Kirsher netif_dbg(efx, probe, efx->net_dev, "initialising I/O\n"); 1200874aeea5SJeff Kirsher 1201874aeea5SJeff Kirsher rc = pci_enable_device(pci_dev); 1202874aeea5SJeff Kirsher if (rc) { 1203874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 1204874aeea5SJeff Kirsher "failed to enable PCI device\n"); 1205874aeea5SJeff Kirsher goto fail1; 1206874aeea5SJeff Kirsher } 1207874aeea5SJeff Kirsher 1208874aeea5SJeff Kirsher pci_set_master(pci_dev); 1209874aeea5SJeff Kirsher 1210874aeea5SJeff Kirsher /* Set the PCI DMA mask. Try all possibilities from our 1211874aeea5SJeff Kirsher * genuine mask down to 32 bits, because some architectures 1212874aeea5SJeff Kirsher * (e.g. x86_64 with iommu_sac_force set) will allow 40 bit 1213874aeea5SJeff Kirsher * masks event though they reject 46 bit masks. 1214874aeea5SJeff Kirsher */ 1215874aeea5SJeff Kirsher while (dma_mask > 0x7fffffffUL) { 12160e33d870SBen Hutchings if (dma_supported(&pci_dev->dev, dma_mask)) { 12179663dedaSRussell King rc = dma_set_mask_and_coherent(&pci_dev->dev, dma_mask); 1218e9e01846SBen Hutchings if (rc == 0) 1219874aeea5SJeff Kirsher break; 1220e9e01846SBen Hutchings } 1221874aeea5SJeff Kirsher dma_mask >>= 1; 1222874aeea5SJeff Kirsher } 1223874aeea5SJeff Kirsher if (rc) { 1224874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 1225874aeea5SJeff Kirsher "could not find a suitable DMA mask\n"); 1226874aeea5SJeff Kirsher goto fail2; 1227874aeea5SJeff Kirsher } 1228874aeea5SJeff Kirsher netif_dbg(efx, probe, efx->net_dev, 1229874aeea5SJeff Kirsher "using DMA mask %llx\n", (unsigned long long) dma_mask); 1230874aeea5SJeff Kirsher 1231874aeea5SJeff Kirsher efx->membase_phys = pci_resource_start(efx->pci_dev, EFX_MEM_BAR); 1232874aeea5SJeff Kirsher rc = pci_request_region(pci_dev, EFX_MEM_BAR, "sfc"); 1233874aeea5SJeff Kirsher if (rc) { 1234874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 1235874aeea5SJeff Kirsher "request for memory BAR failed\n"); 1236874aeea5SJeff Kirsher rc = -EIO; 1237874aeea5SJeff Kirsher goto fail3; 1238874aeea5SJeff Kirsher } 1239b105798fSBen Hutchings efx->membase = ioremap_nocache(efx->membase_phys, mem_map_size); 1240874aeea5SJeff Kirsher if (!efx->membase) { 1241874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 1242874aeea5SJeff Kirsher "could not map memory BAR at %llx+%x\n", 1243b105798fSBen Hutchings (unsigned long long)efx->membase_phys, mem_map_size); 1244874aeea5SJeff Kirsher rc = -ENOMEM; 1245874aeea5SJeff Kirsher goto fail4; 1246874aeea5SJeff Kirsher } 1247874aeea5SJeff Kirsher netif_dbg(efx, probe, efx->net_dev, 1248874aeea5SJeff Kirsher "memory BAR at %llx+%x (virtual %p)\n", 1249b105798fSBen Hutchings (unsigned long long)efx->membase_phys, mem_map_size, 1250b105798fSBen Hutchings efx->membase); 1251874aeea5SJeff Kirsher 1252874aeea5SJeff Kirsher return 0; 1253874aeea5SJeff Kirsher 1254874aeea5SJeff Kirsher fail4: 1255874aeea5SJeff Kirsher pci_release_region(efx->pci_dev, EFX_MEM_BAR); 1256874aeea5SJeff Kirsher fail3: 1257874aeea5SJeff Kirsher efx->membase_phys = 0; 1258874aeea5SJeff Kirsher fail2: 1259874aeea5SJeff Kirsher pci_disable_device(efx->pci_dev); 1260874aeea5SJeff Kirsher fail1: 1261874aeea5SJeff Kirsher return rc; 1262874aeea5SJeff Kirsher } 1263874aeea5SJeff Kirsher 1264874aeea5SJeff Kirsher static void efx_fini_io(struct efx_nic *efx) 1265874aeea5SJeff Kirsher { 1266874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "shutting down I/O\n"); 1267874aeea5SJeff Kirsher 1268874aeea5SJeff Kirsher if (efx->membase) { 1269874aeea5SJeff Kirsher iounmap(efx->membase); 1270874aeea5SJeff Kirsher efx->membase = NULL; 1271874aeea5SJeff Kirsher } 1272874aeea5SJeff Kirsher 1273874aeea5SJeff Kirsher if (efx->membase_phys) { 1274874aeea5SJeff Kirsher pci_release_region(efx->pci_dev, EFX_MEM_BAR); 1275874aeea5SJeff Kirsher efx->membase_phys = 0; 1276874aeea5SJeff Kirsher } 1277874aeea5SJeff Kirsher 1278874aeea5SJeff Kirsher pci_disable_device(efx->pci_dev); 1279874aeea5SJeff Kirsher } 1280874aeea5SJeff Kirsher 1281a9a52506SBen Hutchings static unsigned int efx_wanted_parallelism(struct efx_nic *efx) 1282874aeea5SJeff Kirsher { 1283cdb08f8fSBen Hutchings cpumask_var_t thread_mask; 1284a16e5b24SBen Hutchings unsigned int count; 1285874aeea5SJeff Kirsher int cpu; 1286874aeea5SJeff Kirsher 1287cd2d5b52SBen Hutchings if (rss_cpus) { 1288cd2d5b52SBen Hutchings count = rss_cpus; 1289cd2d5b52SBen Hutchings } else { 1290cdb08f8fSBen Hutchings if (unlikely(!zalloc_cpumask_var(&thread_mask, GFP_KERNEL))) { 1291a9a52506SBen Hutchings netif_warn(efx, probe, efx->net_dev, 1292a9a52506SBen Hutchings "RSS disabled due to allocation failure\n"); 1293874aeea5SJeff Kirsher return 1; 1294874aeea5SJeff Kirsher } 1295874aeea5SJeff Kirsher 1296874aeea5SJeff Kirsher count = 0; 1297874aeea5SJeff Kirsher for_each_online_cpu(cpu) { 1298cdb08f8fSBen Hutchings if (!cpumask_test_cpu(cpu, thread_mask)) { 1299874aeea5SJeff Kirsher ++count; 1300cdb08f8fSBen Hutchings cpumask_or(thread_mask, thread_mask, 1301cdb08f8fSBen Hutchings topology_thread_cpumask(cpu)); 1302874aeea5SJeff Kirsher } 1303874aeea5SJeff Kirsher } 1304874aeea5SJeff Kirsher 1305cdb08f8fSBen Hutchings free_cpumask_var(thread_mask); 1306cd2d5b52SBen Hutchings } 1307cd2d5b52SBen Hutchings 1308cd2d5b52SBen Hutchings /* If RSS is requested for the PF *and* VFs then we can't write RSS 1309cd2d5b52SBen Hutchings * table entries that are inaccessible to VFs 1310cd2d5b52SBen Hutchings */ 1311cd2d5b52SBen Hutchings if (efx_sriov_wanted(efx) && efx_vf_size(efx) > 1 && 1312cd2d5b52SBen Hutchings count > efx_vf_size(efx)) { 1313cd2d5b52SBen Hutchings netif_warn(efx, probe, efx->net_dev, 1314cd2d5b52SBen Hutchings "Reducing number of RSS channels from %u to %u for " 1315cd2d5b52SBen Hutchings "VF support. Increase vf-msix-limit to use more " 1316cd2d5b52SBen Hutchings "channels on the PF.\n", 1317cd2d5b52SBen Hutchings count, efx_vf_size(efx)); 1318cd2d5b52SBen Hutchings count = efx_vf_size(efx); 1319cd2d5b52SBen Hutchings } 1320cd2d5b52SBen Hutchings 1321874aeea5SJeff Kirsher return count; 1322874aeea5SJeff Kirsher } 1323874aeea5SJeff Kirsher 1324874aeea5SJeff Kirsher /* Probe the number and type of interrupts we are able to obtain, and 1325874aeea5SJeff Kirsher * the resulting numbers of channels and RX queues. 1326874aeea5SJeff Kirsher */ 1327874aeea5SJeff Kirsher static int efx_probe_interrupts(struct efx_nic *efx) 1328874aeea5SJeff Kirsher { 13297f967c01SBen Hutchings unsigned int extra_channels = 0; 13307f967c01SBen Hutchings unsigned int i, j; 1331a16e5b24SBen Hutchings int rc; 1332874aeea5SJeff Kirsher 13337f967c01SBen Hutchings for (i = 0; i < EFX_MAX_EXTRA_CHANNELS; i++) 13347f967c01SBen Hutchings if (efx->extra_channel_type[i]) 13357f967c01SBen Hutchings ++extra_channels; 13367f967c01SBen Hutchings 1337874aeea5SJeff Kirsher if (efx->interrupt_mode == EFX_INT_MODE_MSIX) { 1338874aeea5SJeff Kirsher struct msix_entry xentries[EFX_MAX_CHANNELS]; 1339a16e5b24SBen Hutchings unsigned int n_channels; 1340874aeea5SJeff Kirsher 1341a9a52506SBen Hutchings n_channels = efx_wanted_parallelism(efx); 1342874aeea5SJeff Kirsher if (separate_tx_channels) 1343874aeea5SJeff Kirsher n_channels *= 2; 13447f967c01SBen Hutchings n_channels += extra_channels; 1345b105798fSBen Hutchings n_channels = min(n_channels, efx->max_channels); 1346874aeea5SJeff Kirsher 1347874aeea5SJeff Kirsher for (i = 0; i < n_channels; i++) 1348874aeea5SJeff Kirsher xentries[i].entry = i; 1349874aeea5SJeff Kirsher rc = pci_enable_msix(efx->pci_dev, xentries, n_channels); 1350874aeea5SJeff Kirsher if (rc > 0) { 1351874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, 1352874aeea5SJeff Kirsher "WARNING: Insufficient MSI-X vectors" 1353a16e5b24SBen Hutchings " available (%d < %u).\n", rc, n_channels); 1354874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, 1355874aeea5SJeff Kirsher "WARNING: Performance may be reduced.\n"); 1356874aeea5SJeff Kirsher EFX_BUG_ON_PARANOID(rc >= n_channels); 1357874aeea5SJeff Kirsher n_channels = rc; 1358874aeea5SJeff Kirsher rc = pci_enable_msix(efx->pci_dev, xentries, 1359874aeea5SJeff Kirsher n_channels); 1360874aeea5SJeff Kirsher } 1361874aeea5SJeff Kirsher 1362874aeea5SJeff Kirsher if (rc == 0) { 1363874aeea5SJeff Kirsher efx->n_channels = n_channels; 13647f967c01SBen Hutchings if (n_channels > extra_channels) 13657f967c01SBen Hutchings n_channels -= extra_channels; 1366874aeea5SJeff Kirsher if (separate_tx_channels) { 13677f967c01SBen Hutchings efx->n_tx_channels = max(n_channels / 2, 1U); 13687f967c01SBen Hutchings efx->n_rx_channels = max(n_channels - 13697f967c01SBen Hutchings efx->n_tx_channels, 13707f967c01SBen Hutchings 1U); 1371874aeea5SJeff Kirsher } else { 13727f967c01SBen Hutchings efx->n_tx_channels = n_channels; 13737f967c01SBen Hutchings efx->n_rx_channels = n_channels; 1374874aeea5SJeff Kirsher } 13757f967c01SBen Hutchings for (i = 0; i < efx->n_channels; i++) 1376874aeea5SJeff Kirsher efx_get_channel(efx, i)->irq = 1377874aeea5SJeff Kirsher xentries[i].vector; 1378874aeea5SJeff Kirsher } else { 1379874aeea5SJeff Kirsher /* Fall back to single channel MSI */ 1380874aeea5SJeff Kirsher efx->interrupt_mode = EFX_INT_MODE_MSI; 1381874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, 1382874aeea5SJeff Kirsher "could not enable MSI-X\n"); 1383874aeea5SJeff Kirsher } 1384874aeea5SJeff Kirsher } 1385874aeea5SJeff Kirsher 1386874aeea5SJeff Kirsher /* Try single interrupt MSI */ 1387874aeea5SJeff Kirsher if (efx->interrupt_mode == EFX_INT_MODE_MSI) { 1388874aeea5SJeff Kirsher efx->n_channels = 1; 1389874aeea5SJeff Kirsher efx->n_rx_channels = 1; 1390874aeea5SJeff Kirsher efx->n_tx_channels = 1; 1391874aeea5SJeff Kirsher rc = pci_enable_msi(efx->pci_dev); 1392874aeea5SJeff Kirsher if (rc == 0) { 1393874aeea5SJeff Kirsher efx_get_channel(efx, 0)->irq = efx->pci_dev->irq; 1394874aeea5SJeff Kirsher } else { 1395874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, 1396874aeea5SJeff Kirsher "could not enable MSI\n"); 1397874aeea5SJeff Kirsher efx->interrupt_mode = EFX_INT_MODE_LEGACY; 1398874aeea5SJeff Kirsher } 1399874aeea5SJeff Kirsher } 1400874aeea5SJeff Kirsher 1401874aeea5SJeff Kirsher /* Assume legacy interrupts */ 1402874aeea5SJeff Kirsher if (efx->interrupt_mode == EFX_INT_MODE_LEGACY) { 1403874aeea5SJeff Kirsher efx->n_channels = 1 + (separate_tx_channels ? 1 : 0); 1404874aeea5SJeff Kirsher efx->n_rx_channels = 1; 1405874aeea5SJeff Kirsher efx->n_tx_channels = 1; 1406874aeea5SJeff Kirsher efx->legacy_irq = efx->pci_dev->irq; 1407874aeea5SJeff Kirsher } 1408874aeea5SJeff Kirsher 14097f967c01SBen Hutchings /* Assign extra channels if possible */ 14107f967c01SBen Hutchings j = efx->n_channels; 14117f967c01SBen Hutchings for (i = 0; i < EFX_MAX_EXTRA_CHANNELS; i++) { 14127f967c01SBen Hutchings if (!efx->extra_channel_type[i]) 14137f967c01SBen Hutchings continue; 14147f967c01SBen Hutchings if (efx->interrupt_mode != EFX_INT_MODE_MSIX || 14157f967c01SBen Hutchings efx->n_channels <= extra_channels) { 14167f967c01SBen Hutchings efx->extra_channel_type[i]->handle_no_channel(efx); 14177f967c01SBen Hutchings } else { 14187f967c01SBen Hutchings --j; 14197f967c01SBen Hutchings efx_get_channel(efx, j)->type = 14207f967c01SBen Hutchings efx->extra_channel_type[i]; 14217f967c01SBen Hutchings } 14227f967c01SBen Hutchings } 14237f967c01SBen Hutchings 1424cd2d5b52SBen Hutchings /* RSS might be usable on VFs even if it is disabled on the PF */ 14253132d282SBen Hutchings efx->rss_spread = ((efx->n_rx_channels > 1 || !efx_sriov_wanted(efx)) ? 1426cd2d5b52SBen Hutchings efx->n_rx_channels : efx_vf_size(efx)); 1427cd2d5b52SBen Hutchings 1428874aeea5SJeff Kirsher return 0; 1429874aeea5SJeff Kirsher } 1430874aeea5SJeff Kirsher 1431261e4d96SJon Cooper static int efx_soft_enable_interrupts(struct efx_nic *efx) 1432d8291187SBen Hutchings { 1433261e4d96SJon Cooper struct efx_channel *channel, *end_channel; 1434261e4d96SJon Cooper int rc; 1435d8291187SBen Hutchings 1436d8291187SBen Hutchings BUG_ON(efx->state == STATE_DISABLED); 1437d8291187SBen Hutchings 1438d8291187SBen Hutchings efx->irq_soft_enabled = true; 1439d8291187SBen Hutchings smp_wmb(); 1440d8291187SBen Hutchings 1441d8291187SBen Hutchings efx_for_each_channel(channel, efx) { 1442261e4d96SJon Cooper if (!channel->type->keep_eventq) { 1443261e4d96SJon Cooper rc = efx_init_eventq(channel); 1444261e4d96SJon Cooper if (rc) 1445261e4d96SJon Cooper goto fail; 1446261e4d96SJon Cooper } 1447d8291187SBen Hutchings efx_start_eventq(channel); 1448d8291187SBen Hutchings } 1449d8291187SBen Hutchings 1450d8291187SBen Hutchings efx_mcdi_mode_event(efx); 1451261e4d96SJon Cooper 1452261e4d96SJon Cooper return 0; 1453261e4d96SJon Cooper fail: 1454261e4d96SJon Cooper end_channel = channel; 1455261e4d96SJon Cooper efx_for_each_channel(channel, efx) { 1456261e4d96SJon Cooper if (channel == end_channel) 1457261e4d96SJon Cooper break; 1458261e4d96SJon Cooper efx_stop_eventq(channel); 1459261e4d96SJon Cooper if (!channel->type->keep_eventq) 1460261e4d96SJon Cooper efx_fini_eventq(channel); 1461261e4d96SJon Cooper } 1462261e4d96SJon Cooper 1463261e4d96SJon Cooper return rc; 1464d8291187SBen Hutchings } 1465d8291187SBen Hutchings 1466d8291187SBen Hutchings static void efx_soft_disable_interrupts(struct efx_nic *efx) 1467d8291187SBen Hutchings { 1468d8291187SBen Hutchings struct efx_channel *channel; 1469d8291187SBen Hutchings 1470d8291187SBen Hutchings if (efx->state == STATE_DISABLED) 1471d8291187SBen Hutchings return; 1472d8291187SBen Hutchings 1473d8291187SBen Hutchings efx_mcdi_mode_poll(efx); 1474d8291187SBen Hutchings 1475d8291187SBen Hutchings efx->irq_soft_enabled = false; 1476d8291187SBen Hutchings smp_wmb(); 1477d8291187SBen Hutchings 1478d8291187SBen Hutchings if (efx->legacy_irq) 1479d8291187SBen Hutchings synchronize_irq(efx->legacy_irq); 1480d8291187SBen Hutchings 1481d8291187SBen Hutchings efx_for_each_channel(channel, efx) { 1482d8291187SBen Hutchings if (channel->irq) 1483d8291187SBen Hutchings synchronize_irq(channel->irq); 1484d8291187SBen Hutchings 1485d8291187SBen Hutchings efx_stop_eventq(channel); 1486d8291187SBen Hutchings if (!channel->type->keep_eventq) 1487d8291187SBen Hutchings efx_fini_eventq(channel); 1488d8291187SBen Hutchings } 1489cade715fSBen Hutchings 1490cade715fSBen Hutchings /* Flush the asynchronous MCDI request queue */ 1491cade715fSBen Hutchings efx_mcdi_flush_async(efx); 1492d8291187SBen Hutchings } 1493d8291187SBen Hutchings 1494261e4d96SJon Cooper static int efx_enable_interrupts(struct efx_nic *efx) 14959f2cb71cSBen Hutchings { 1496261e4d96SJon Cooper struct efx_channel *channel, *end_channel; 1497261e4d96SJon Cooper int rc; 14989f2cb71cSBen Hutchings 14998b7325b4SBen Hutchings BUG_ON(efx->state == STATE_DISABLED); 15008b7325b4SBen Hutchings 1501b28405b0SAlexandre Rames if (efx->eeh_disabled_legacy_irq) { 1502b28405b0SAlexandre Rames enable_irq(efx->legacy_irq); 1503b28405b0SAlexandre Rames efx->eeh_disabled_legacy_irq = false; 1504b28405b0SAlexandre Rames } 1505d8291187SBen Hutchings 150686094f7fSBen Hutchings efx->type->irq_enable_master(efx); 15079f2cb71cSBen Hutchings 15089f2cb71cSBen Hutchings efx_for_each_channel(channel, efx) { 1509261e4d96SJon Cooper if (channel->type->keep_eventq) { 1510261e4d96SJon Cooper rc = efx_init_eventq(channel); 1511261e4d96SJon Cooper if (rc) 1512261e4d96SJon Cooper goto fail; 1513261e4d96SJon Cooper } 15149f2cb71cSBen Hutchings } 15159f2cb71cSBen Hutchings 1516261e4d96SJon Cooper rc = efx_soft_enable_interrupts(efx); 1517261e4d96SJon Cooper if (rc) 1518261e4d96SJon Cooper goto fail; 1519261e4d96SJon Cooper 1520261e4d96SJon Cooper return 0; 1521261e4d96SJon Cooper 1522261e4d96SJon Cooper fail: 1523261e4d96SJon Cooper end_channel = channel; 1524261e4d96SJon Cooper efx_for_each_channel(channel, efx) { 1525261e4d96SJon Cooper if (channel == end_channel) 1526261e4d96SJon Cooper break; 1527261e4d96SJon Cooper if (channel->type->keep_eventq) 1528261e4d96SJon Cooper efx_fini_eventq(channel); 1529261e4d96SJon Cooper } 1530261e4d96SJon Cooper 1531261e4d96SJon Cooper efx->type->irq_disable_non_ev(efx); 1532261e4d96SJon Cooper 1533261e4d96SJon Cooper return rc; 15349f2cb71cSBen Hutchings } 15359f2cb71cSBen Hutchings 1536d8291187SBen Hutchings static void efx_disable_interrupts(struct efx_nic *efx) 15379f2cb71cSBen Hutchings { 15389f2cb71cSBen Hutchings struct efx_channel *channel; 15399f2cb71cSBen Hutchings 1540d8291187SBen Hutchings efx_soft_disable_interrupts(efx); 15419f2cb71cSBen Hutchings 15429f2cb71cSBen Hutchings efx_for_each_channel(channel, efx) { 1543d8291187SBen Hutchings if (channel->type->keep_eventq) 15449f2cb71cSBen Hutchings efx_fini_eventq(channel); 15459f2cb71cSBen Hutchings } 1546d8291187SBen Hutchings 154786094f7fSBen Hutchings efx->type->irq_disable_non_ev(efx); 15489f2cb71cSBen Hutchings } 15499f2cb71cSBen Hutchings 1550874aeea5SJeff Kirsher static void efx_remove_interrupts(struct efx_nic *efx) 1551874aeea5SJeff Kirsher { 1552874aeea5SJeff Kirsher struct efx_channel *channel; 1553874aeea5SJeff Kirsher 1554874aeea5SJeff Kirsher /* Remove MSI/MSI-X interrupts */ 1555874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) 1556874aeea5SJeff Kirsher channel->irq = 0; 1557874aeea5SJeff Kirsher pci_disable_msi(efx->pci_dev); 1558874aeea5SJeff Kirsher pci_disable_msix(efx->pci_dev); 1559874aeea5SJeff Kirsher 1560874aeea5SJeff Kirsher /* Remove legacy interrupt */ 1561874aeea5SJeff Kirsher efx->legacy_irq = 0; 1562874aeea5SJeff Kirsher } 1563874aeea5SJeff Kirsher 1564874aeea5SJeff Kirsher static void efx_set_channels(struct efx_nic *efx) 1565874aeea5SJeff Kirsher { 1566874aeea5SJeff Kirsher struct efx_channel *channel; 1567874aeea5SJeff Kirsher struct efx_tx_queue *tx_queue; 1568874aeea5SJeff Kirsher 1569874aeea5SJeff Kirsher efx->tx_channel_offset = 1570874aeea5SJeff Kirsher separate_tx_channels ? efx->n_channels - efx->n_tx_channels : 0; 1571874aeea5SJeff Kirsher 157279d68b37SStuart Hodgson /* We need to mark which channels really have RX and TX 157379d68b37SStuart Hodgson * queues, and adjust the TX queue numbers if we have separate 1574874aeea5SJeff Kirsher * RX-only and TX-only channels. 1575874aeea5SJeff Kirsher */ 1576874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) { 157779d68b37SStuart Hodgson if (channel->channel < efx->n_rx_channels) 157879d68b37SStuart Hodgson channel->rx_queue.core_index = channel->channel; 157979d68b37SStuart Hodgson else 158079d68b37SStuart Hodgson channel->rx_queue.core_index = -1; 158179d68b37SStuart Hodgson 1582874aeea5SJeff Kirsher efx_for_each_channel_tx_queue(tx_queue, channel) 1583874aeea5SJeff Kirsher tx_queue->queue -= (efx->tx_channel_offset * 1584874aeea5SJeff Kirsher EFX_TXQ_TYPES); 1585874aeea5SJeff Kirsher } 1586874aeea5SJeff Kirsher } 1587874aeea5SJeff Kirsher 1588874aeea5SJeff Kirsher static int efx_probe_nic(struct efx_nic *efx) 1589874aeea5SJeff Kirsher { 1590874aeea5SJeff Kirsher size_t i; 1591874aeea5SJeff Kirsher int rc; 1592874aeea5SJeff Kirsher 1593874aeea5SJeff Kirsher netif_dbg(efx, probe, efx->net_dev, "creating NIC\n"); 1594874aeea5SJeff Kirsher 1595874aeea5SJeff Kirsher /* Carry out hardware-type specific initialisation */ 1596874aeea5SJeff Kirsher rc = efx->type->probe(efx); 1597874aeea5SJeff Kirsher if (rc) 1598874aeea5SJeff Kirsher return rc; 1599874aeea5SJeff Kirsher 1600874aeea5SJeff Kirsher /* Determine the number of channels and queues by trying to hook 1601874aeea5SJeff Kirsher * in MSI-X interrupts. */ 1602874aeea5SJeff Kirsher rc = efx_probe_interrupts(efx); 1603874aeea5SJeff Kirsher if (rc) 1604c15eed22SBen Hutchings goto fail1; 1605874aeea5SJeff Kirsher 1606c15eed22SBen Hutchings rc = efx->type->dimension_resources(efx); 1607c15eed22SBen Hutchings if (rc) 1608c15eed22SBen Hutchings goto fail2; 160928e47c49SBen Hutchings 1610874aeea5SJeff Kirsher if (efx->n_channels > 1) 1611874aeea5SJeff Kirsher get_random_bytes(&efx->rx_hash_key, sizeof(efx->rx_hash_key)); 1612874aeea5SJeff Kirsher for (i = 0; i < ARRAY_SIZE(efx->rx_indir_table); i++) 1613278bc429SBen Hutchings efx->rx_indir_table[i] = 1614cd2d5b52SBen Hutchings ethtool_rxfh_indir_default(i, efx->rss_spread); 1615874aeea5SJeff Kirsher 1616874aeea5SJeff Kirsher efx_set_channels(efx); 1617874aeea5SJeff Kirsher netif_set_real_num_tx_queues(efx->net_dev, efx->n_tx_channels); 1618874aeea5SJeff Kirsher netif_set_real_num_rx_queues(efx->net_dev, efx->n_rx_channels); 1619874aeea5SJeff Kirsher 1620874aeea5SJeff Kirsher /* Initialise the interrupt moderation settings */ 16219e393b30SBen Hutchings efx_init_irq_moderation(efx, tx_irq_mod_usec, rx_irq_mod_usec, true, 16229e393b30SBen Hutchings true); 1623874aeea5SJeff Kirsher 1624874aeea5SJeff Kirsher return 0; 1625874aeea5SJeff Kirsher 1626c15eed22SBen Hutchings fail2: 1627c15eed22SBen Hutchings efx_remove_interrupts(efx); 1628c15eed22SBen Hutchings fail1: 1629874aeea5SJeff Kirsher efx->type->remove(efx); 1630874aeea5SJeff Kirsher return rc; 1631874aeea5SJeff Kirsher } 1632874aeea5SJeff Kirsher 1633874aeea5SJeff Kirsher static void efx_remove_nic(struct efx_nic *efx) 1634874aeea5SJeff Kirsher { 1635874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "destroying NIC\n"); 1636874aeea5SJeff Kirsher 1637874aeea5SJeff Kirsher efx_remove_interrupts(efx); 1638874aeea5SJeff Kirsher efx->type->remove(efx); 1639874aeea5SJeff Kirsher } 1640874aeea5SJeff Kirsher 1641add72477SBen Hutchings static int efx_probe_filters(struct efx_nic *efx) 1642add72477SBen Hutchings { 1643add72477SBen Hutchings int rc; 1644add72477SBen Hutchings 1645add72477SBen Hutchings spin_lock_init(&efx->filter_lock); 1646add72477SBen Hutchings 1647add72477SBen Hutchings rc = efx->type->filter_table_probe(efx); 1648add72477SBen Hutchings if (rc) 1649add72477SBen Hutchings return rc; 1650add72477SBen Hutchings 1651add72477SBen Hutchings #ifdef CONFIG_RFS_ACCEL 1652add72477SBen Hutchings if (efx->type->offload_features & NETIF_F_NTUPLE) { 1653add72477SBen Hutchings efx->rps_flow_id = kcalloc(efx->type->max_rx_ip_filters, 1654add72477SBen Hutchings sizeof(*efx->rps_flow_id), 1655add72477SBen Hutchings GFP_KERNEL); 1656add72477SBen Hutchings if (!efx->rps_flow_id) { 1657add72477SBen Hutchings efx->type->filter_table_remove(efx); 1658add72477SBen Hutchings return -ENOMEM; 1659add72477SBen Hutchings } 1660add72477SBen Hutchings } 1661add72477SBen Hutchings #endif 1662add72477SBen Hutchings 1663add72477SBen Hutchings return 0; 1664add72477SBen Hutchings } 1665add72477SBen Hutchings 1666add72477SBen Hutchings static void efx_remove_filters(struct efx_nic *efx) 1667add72477SBen Hutchings { 1668add72477SBen Hutchings #ifdef CONFIG_RFS_ACCEL 1669add72477SBen Hutchings kfree(efx->rps_flow_id); 1670add72477SBen Hutchings #endif 1671add72477SBen Hutchings efx->type->filter_table_remove(efx); 1672add72477SBen Hutchings } 1673add72477SBen Hutchings 1674add72477SBen Hutchings static void efx_restore_filters(struct efx_nic *efx) 1675add72477SBen Hutchings { 1676add72477SBen Hutchings efx->type->filter_table_restore(efx); 1677add72477SBen Hutchings } 1678add72477SBen Hutchings 1679874aeea5SJeff Kirsher /************************************************************************** 1680874aeea5SJeff Kirsher * 1681874aeea5SJeff Kirsher * NIC startup/shutdown 1682874aeea5SJeff Kirsher * 1683874aeea5SJeff Kirsher *************************************************************************/ 1684874aeea5SJeff Kirsher 1685874aeea5SJeff Kirsher static int efx_probe_all(struct efx_nic *efx) 1686874aeea5SJeff Kirsher { 1687874aeea5SJeff Kirsher int rc; 1688874aeea5SJeff Kirsher 1689874aeea5SJeff Kirsher rc = efx_probe_nic(efx); 1690874aeea5SJeff Kirsher if (rc) { 1691874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, "failed to create NIC\n"); 1692874aeea5SJeff Kirsher goto fail1; 1693874aeea5SJeff Kirsher } 1694874aeea5SJeff Kirsher 1695874aeea5SJeff Kirsher rc = efx_probe_port(efx); 1696874aeea5SJeff Kirsher if (rc) { 1697874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, "failed to create port\n"); 1698874aeea5SJeff Kirsher goto fail2; 1699874aeea5SJeff Kirsher } 1700874aeea5SJeff Kirsher 17017e6d06f0SBen Hutchings BUILD_BUG_ON(EFX_DEFAULT_DMAQ_SIZE < EFX_RXQ_MIN_ENT); 17027e6d06f0SBen Hutchings if (WARN_ON(EFX_DEFAULT_DMAQ_SIZE < EFX_TXQ_MIN_ENT(efx))) { 17037e6d06f0SBen Hutchings rc = -EINVAL; 17047e6d06f0SBen Hutchings goto fail3; 17057e6d06f0SBen Hutchings } 1706874aeea5SJeff Kirsher efx->rxq_entries = efx->txq_entries = EFX_DEFAULT_DMAQ_SIZE; 1707874aeea5SJeff Kirsher 1708874aeea5SJeff Kirsher rc = efx_probe_filters(efx); 1709874aeea5SJeff Kirsher if (rc) { 1710874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 1711874aeea5SJeff Kirsher "failed to create filter tables\n"); 17127f967c01SBen Hutchings goto fail3; 1713874aeea5SJeff Kirsher } 1714874aeea5SJeff Kirsher 17157f967c01SBen Hutchings rc = efx_probe_channels(efx); 17167f967c01SBen Hutchings if (rc) 17177f967c01SBen Hutchings goto fail4; 17187f967c01SBen Hutchings 1719874aeea5SJeff Kirsher return 0; 1720874aeea5SJeff Kirsher 1721874aeea5SJeff Kirsher fail4: 17227f967c01SBen Hutchings efx_remove_filters(efx); 1723874aeea5SJeff Kirsher fail3: 1724874aeea5SJeff Kirsher efx_remove_port(efx); 1725874aeea5SJeff Kirsher fail2: 1726874aeea5SJeff Kirsher efx_remove_nic(efx); 1727874aeea5SJeff Kirsher fail1: 1728874aeea5SJeff Kirsher return rc; 1729874aeea5SJeff Kirsher } 1730874aeea5SJeff Kirsher 17318b7325b4SBen Hutchings /* If the interface is supposed to be running but is not, start 17328b7325b4SBen Hutchings * the hardware and software data path, regular activity for the port 17338b7325b4SBen Hutchings * (MAC statistics, link polling, etc.) and schedule the port to be 17348b7325b4SBen Hutchings * reconfigured. Interrupts must already be enabled. This function 17358b7325b4SBen Hutchings * is safe to call multiple times, so long as the NIC is not disabled. 17368b7325b4SBen Hutchings * Requires the RTNL lock. 17379f2cb71cSBen Hutchings */ 1738874aeea5SJeff Kirsher static void efx_start_all(struct efx_nic *efx) 1739874aeea5SJeff Kirsher { 1740874aeea5SJeff Kirsher EFX_ASSERT_RESET_SERIALISED(efx); 17418b7325b4SBen Hutchings BUG_ON(efx->state == STATE_DISABLED); 1742874aeea5SJeff Kirsher 1743874aeea5SJeff Kirsher /* Check that it is appropriate to restart the interface. All 1744874aeea5SJeff Kirsher * of these flags are safe to read under just the rtnl lock */ 17458b7325b4SBen Hutchings if (efx->port_enabled || !netif_running(efx->net_dev)) 1746874aeea5SJeff Kirsher return; 1747874aeea5SJeff Kirsher 1748874aeea5SJeff Kirsher efx_start_port(efx); 17499f2cb71cSBen Hutchings efx_start_datapath(efx); 1750874aeea5SJeff Kirsher 1751626950dbSAlexandre Rames /* Start the hardware monitor if there is one */ 1752626950dbSAlexandre Rames if (efx->type->monitor != NULL) 1753874aeea5SJeff Kirsher queue_delayed_work(efx->workqueue, &efx->monitor_work, 1754874aeea5SJeff Kirsher efx_monitor_interval); 1755626950dbSAlexandre Rames 1756626950dbSAlexandre Rames /* If link state detection is normally event-driven, we have 1757626950dbSAlexandre Rames * to poll now because we could have missed a change 1758626950dbSAlexandre Rames */ 1759626950dbSAlexandre Rames if (efx_nic_rev(efx) >= EFX_REV_SIENA_A0) { 1760874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 1761874aeea5SJeff Kirsher if (efx->phy_op->poll(efx)) 1762874aeea5SJeff Kirsher efx_link_status_changed(efx); 1763874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 1764874aeea5SJeff Kirsher } 1765874aeea5SJeff Kirsher 1766874aeea5SJeff Kirsher efx->type->start_stats(efx); 1767f8f3b5aeSJon Cooper efx->type->pull_stats(efx); 1768f8f3b5aeSJon Cooper spin_lock_bh(&efx->stats_lock); 1769f8f3b5aeSJon Cooper efx->type->update_stats(efx, NULL, NULL); 1770f8f3b5aeSJon Cooper spin_unlock_bh(&efx->stats_lock); 1771874aeea5SJeff Kirsher } 1772874aeea5SJeff Kirsher 17738b7325b4SBen Hutchings /* Quiesce the hardware and software data path, and regular activity 17748b7325b4SBen Hutchings * for the port without bringing the link down. Safe to call multiple 17758b7325b4SBen Hutchings * times with the NIC in almost any state, but interrupts should be 17768b7325b4SBen Hutchings * enabled. Requires the RTNL lock. 17778b7325b4SBen Hutchings */ 1778874aeea5SJeff Kirsher static void efx_stop_all(struct efx_nic *efx) 1779874aeea5SJeff Kirsher { 1780874aeea5SJeff Kirsher EFX_ASSERT_RESET_SERIALISED(efx); 1781874aeea5SJeff Kirsher 1782874aeea5SJeff Kirsher /* port_enabled can be read safely under the rtnl lock */ 1783874aeea5SJeff Kirsher if (!efx->port_enabled) 1784874aeea5SJeff Kirsher return; 1785874aeea5SJeff Kirsher 1786f8f3b5aeSJon Cooper /* update stats before we go down so we can accurately count 1787f8f3b5aeSJon Cooper * rx_nodesc_drops 1788f8f3b5aeSJon Cooper */ 1789f8f3b5aeSJon Cooper efx->type->pull_stats(efx); 1790f8f3b5aeSJon Cooper spin_lock_bh(&efx->stats_lock); 1791f8f3b5aeSJon Cooper efx->type->update_stats(efx, NULL, NULL); 1792f8f3b5aeSJon Cooper spin_unlock_bh(&efx->stats_lock); 1793874aeea5SJeff Kirsher efx->type->stop_stats(efx); 1794874aeea5SJeff Kirsher efx_stop_port(efx); 1795874aeea5SJeff Kirsher 179629c69a48SBen Hutchings /* Stop the kernel transmit interface. This is only valid if 179729c69a48SBen Hutchings * the device is stopped or detached; otherwise the watchdog 179829c69a48SBen Hutchings * may fire immediately. 179929c69a48SBen Hutchings */ 180029c69a48SBen Hutchings WARN_ON(netif_running(efx->net_dev) && 180129c69a48SBen Hutchings netif_device_present(efx->net_dev)); 18029f2cb71cSBen Hutchings netif_tx_disable(efx->net_dev); 18039f2cb71cSBen Hutchings 18049f2cb71cSBen Hutchings efx_stop_datapath(efx); 1805874aeea5SJeff Kirsher } 1806874aeea5SJeff Kirsher 1807874aeea5SJeff Kirsher static void efx_remove_all(struct efx_nic *efx) 1808874aeea5SJeff Kirsher { 1809874aeea5SJeff Kirsher efx_remove_channels(efx); 18107f967c01SBen Hutchings efx_remove_filters(efx); 1811874aeea5SJeff Kirsher efx_remove_port(efx); 1812874aeea5SJeff Kirsher efx_remove_nic(efx); 1813874aeea5SJeff Kirsher } 1814874aeea5SJeff Kirsher 1815874aeea5SJeff Kirsher /************************************************************************** 1816874aeea5SJeff Kirsher * 1817874aeea5SJeff Kirsher * Interrupt moderation 1818874aeea5SJeff Kirsher * 1819874aeea5SJeff Kirsher **************************************************************************/ 1820874aeea5SJeff Kirsher 1821cc180b69SBen Hutchings static unsigned int irq_mod_ticks(unsigned int usecs, unsigned int quantum_ns) 1822874aeea5SJeff Kirsher { 1823b548f976SBen Hutchings if (usecs == 0) 1824b548f976SBen Hutchings return 0; 1825cc180b69SBen Hutchings if (usecs * 1000 < quantum_ns) 1826874aeea5SJeff Kirsher return 1; /* never round down to 0 */ 1827cc180b69SBen Hutchings return usecs * 1000 / quantum_ns; 1828874aeea5SJeff Kirsher } 1829874aeea5SJeff Kirsher 1830874aeea5SJeff Kirsher /* Set interrupt moderation parameters */ 18319e393b30SBen Hutchings int efx_init_irq_moderation(struct efx_nic *efx, unsigned int tx_usecs, 18329e393b30SBen Hutchings unsigned int rx_usecs, bool rx_adaptive, 18339e393b30SBen Hutchings bool rx_may_override_tx) 1834874aeea5SJeff Kirsher { 1835874aeea5SJeff Kirsher struct efx_channel *channel; 1836cc180b69SBen Hutchings unsigned int irq_mod_max = DIV_ROUND_UP(efx->type->timer_period_max * 1837cc180b69SBen Hutchings efx->timer_quantum_ns, 1838cc180b69SBen Hutchings 1000); 1839cc180b69SBen Hutchings unsigned int tx_ticks; 1840cc180b69SBen Hutchings unsigned int rx_ticks; 1841874aeea5SJeff Kirsher 1842874aeea5SJeff Kirsher EFX_ASSERT_RESET_SERIALISED(efx); 1843874aeea5SJeff Kirsher 1844cc180b69SBen Hutchings if (tx_usecs > irq_mod_max || rx_usecs > irq_mod_max) 18459e393b30SBen Hutchings return -EINVAL; 18469e393b30SBen Hutchings 1847cc180b69SBen Hutchings tx_ticks = irq_mod_ticks(tx_usecs, efx->timer_quantum_ns); 1848cc180b69SBen Hutchings rx_ticks = irq_mod_ticks(rx_usecs, efx->timer_quantum_ns); 1849cc180b69SBen Hutchings 18509e393b30SBen Hutchings if (tx_ticks != rx_ticks && efx->tx_channel_offset == 0 && 18519e393b30SBen Hutchings !rx_may_override_tx) { 18529e393b30SBen Hutchings netif_err(efx, drv, efx->net_dev, "Channels are shared. " 18539e393b30SBen Hutchings "RX and TX IRQ moderation must be equal\n"); 18549e393b30SBen Hutchings return -EINVAL; 18559e393b30SBen Hutchings } 18569e393b30SBen Hutchings 1857874aeea5SJeff Kirsher efx->irq_rx_adaptive = rx_adaptive; 1858874aeea5SJeff Kirsher efx->irq_rx_moderation = rx_ticks; 1859874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) { 1860874aeea5SJeff Kirsher if (efx_channel_has_rx_queue(channel)) 1861874aeea5SJeff Kirsher channel->irq_moderation = rx_ticks; 1862874aeea5SJeff Kirsher else if (efx_channel_has_tx_queues(channel)) 1863874aeea5SJeff Kirsher channel->irq_moderation = tx_ticks; 1864874aeea5SJeff Kirsher } 18659e393b30SBen Hutchings 18669e393b30SBen Hutchings return 0; 1867874aeea5SJeff Kirsher } 1868874aeea5SJeff Kirsher 1869a0c4faf5SBen Hutchings void efx_get_irq_moderation(struct efx_nic *efx, unsigned int *tx_usecs, 1870a0c4faf5SBen Hutchings unsigned int *rx_usecs, bool *rx_adaptive) 1871a0c4faf5SBen Hutchings { 1872cc180b69SBen Hutchings /* We must round up when converting ticks to microseconds 1873cc180b69SBen Hutchings * because we round down when converting the other way. 1874cc180b69SBen Hutchings */ 1875cc180b69SBen Hutchings 1876a0c4faf5SBen Hutchings *rx_adaptive = efx->irq_rx_adaptive; 1877cc180b69SBen Hutchings *rx_usecs = DIV_ROUND_UP(efx->irq_rx_moderation * 1878cc180b69SBen Hutchings efx->timer_quantum_ns, 1879cc180b69SBen Hutchings 1000); 1880a0c4faf5SBen Hutchings 1881a0c4faf5SBen Hutchings /* If channels are shared between RX and TX, so is IRQ 1882a0c4faf5SBen Hutchings * moderation. Otherwise, IRQ moderation is the same for all 1883a0c4faf5SBen Hutchings * TX channels and is not adaptive. 1884a0c4faf5SBen Hutchings */ 1885a0c4faf5SBen Hutchings if (efx->tx_channel_offset == 0) 1886a0c4faf5SBen Hutchings *tx_usecs = *rx_usecs; 1887a0c4faf5SBen Hutchings else 1888cc180b69SBen Hutchings *tx_usecs = DIV_ROUND_UP( 1889a0c4faf5SBen Hutchings efx->channel[efx->tx_channel_offset]->irq_moderation * 1890cc180b69SBen Hutchings efx->timer_quantum_ns, 1891cc180b69SBen Hutchings 1000); 1892a0c4faf5SBen Hutchings } 1893a0c4faf5SBen Hutchings 1894874aeea5SJeff Kirsher /************************************************************************** 1895874aeea5SJeff Kirsher * 1896874aeea5SJeff Kirsher * Hardware monitor 1897874aeea5SJeff Kirsher * 1898874aeea5SJeff Kirsher **************************************************************************/ 1899874aeea5SJeff Kirsher 1900874aeea5SJeff Kirsher /* Run periodically off the general workqueue */ 1901874aeea5SJeff Kirsher static void efx_monitor(struct work_struct *data) 1902874aeea5SJeff Kirsher { 1903874aeea5SJeff Kirsher struct efx_nic *efx = container_of(data, struct efx_nic, 1904874aeea5SJeff Kirsher monitor_work.work); 1905874aeea5SJeff Kirsher 1906874aeea5SJeff Kirsher netif_vdbg(efx, timer, efx->net_dev, 1907874aeea5SJeff Kirsher "hardware monitor executing on CPU %d\n", 1908874aeea5SJeff Kirsher raw_smp_processor_id()); 1909874aeea5SJeff Kirsher BUG_ON(efx->type->monitor == NULL); 1910874aeea5SJeff Kirsher 1911874aeea5SJeff Kirsher /* If the mac_lock is already held then it is likely a port 1912874aeea5SJeff Kirsher * reconfiguration is already in place, which will likely do 1913874aeea5SJeff Kirsher * most of the work of monitor() anyway. */ 1914874aeea5SJeff Kirsher if (mutex_trylock(&efx->mac_lock)) { 1915874aeea5SJeff Kirsher if (efx->port_enabled) 1916874aeea5SJeff Kirsher efx->type->monitor(efx); 1917874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 1918874aeea5SJeff Kirsher } 1919874aeea5SJeff Kirsher 1920874aeea5SJeff Kirsher queue_delayed_work(efx->workqueue, &efx->monitor_work, 1921874aeea5SJeff Kirsher efx_monitor_interval); 1922874aeea5SJeff Kirsher } 1923874aeea5SJeff Kirsher 1924874aeea5SJeff Kirsher /************************************************************************** 1925874aeea5SJeff Kirsher * 1926874aeea5SJeff Kirsher * ioctls 1927874aeea5SJeff Kirsher * 1928874aeea5SJeff Kirsher *************************************************************************/ 1929874aeea5SJeff Kirsher 1930874aeea5SJeff Kirsher /* Net device ioctl 1931874aeea5SJeff Kirsher * Context: process, rtnl_lock() held. 1932874aeea5SJeff Kirsher */ 1933874aeea5SJeff Kirsher static int efx_ioctl(struct net_device *net_dev, struct ifreq *ifr, int cmd) 1934874aeea5SJeff Kirsher { 1935874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 1936874aeea5SJeff Kirsher struct mii_ioctl_data *data = if_mii(ifr); 1937874aeea5SJeff Kirsher 19387c236c43SStuart Hodgson if (cmd == SIOCSHWTSTAMP) 1939433dc9b3SBen Hutchings return efx_ptp_set_ts_config(efx, ifr); 1940433dc9b3SBen Hutchings if (cmd == SIOCGHWTSTAMP) 1941433dc9b3SBen Hutchings return efx_ptp_get_ts_config(efx, ifr); 19427c236c43SStuart Hodgson 1943874aeea5SJeff Kirsher /* Convert phy_id from older PRTAD/DEVAD format */ 1944874aeea5SJeff Kirsher if ((cmd == SIOCGMIIREG || cmd == SIOCSMIIREG) && 1945874aeea5SJeff Kirsher (data->phy_id & 0xfc00) == 0x0400) 1946874aeea5SJeff Kirsher data->phy_id ^= MDIO_PHY_ID_C45 | 0x0400; 1947874aeea5SJeff Kirsher 1948874aeea5SJeff Kirsher return mdio_mii_ioctl(&efx->mdio, data, cmd); 1949874aeea5SJeff Kirsher } 1950874aeea5SJeff Kirsher 1951874aeea5SJeff Kirsher /************************************************************************** 1952874aeea5SJeff Kirsher * 1953874aeea5SJeff Kirsher * NAPI interface 1954874aeea5SJeff Kirsher * 1955874aeea5SJeff Kirsher **************************************************************************/ 1956874aeea5SJeff Kirsher 19577f967c01SBen Hutchings static void efx_init_napi_channel(struct efx_channel *channel) 1958874aeea5SJeff Kirsher { 19597f967c01SBen Hutchings struct efx_nic *efx = channel->efx; 1960874aeea5SJeff Kirsher 1961874aeea5SJeff Kirsher channel->napi_dev = efx->net_dev; 1962874aeea5SJeff Kirsher netif_napi_add(channel->napi_dev, &channel->napi_str, 1963874aeea5SJeff Kirsher efx_poll, napi_weight); 1964874aeea5SJeff Kirsher } 19657f967c01SBen Hutchings 19667f967c01SBen Hutchings static void efx_init_napi(struct efx_nic *efx) 19677f967c01SBen Hutchings { 19687f967c01SBen Hutchings struct efx_channel *channel; 19697f967c01SBen Hutchings 19707f967c01SBen Hutchings efx_for_each_channel(channel, efx) 19717f967c01SBen Hutchings efx_init_napi_channel(channel); 1972874aeea5SJeff Kirsher } 1973874aeea5SJeff Kirsher 1974874aeea5SJeff Kirsher static void efx_fini_napi_channel(struct efx_channel *channel) 1975874aeea5SJeff Kirsher { 1976874aeea5SJeff Kirsher if (channel->napi_dev) 1977874aeea5SJeff Kirsher netif_napi_del(&channel->napi_str); 1978874aeea5SJeff Kirsher channel->napi_dev = NULL; 1979874aeea5SJeff Kirsher } 1980874aeea5SJeff Kirsher 1981874aeea5SJeff Kirsher static void efx_fini_napi(struct efx_nic *efx) 1982874aeea5SJeff Kirsher { 1983874aeea5SJeff Kirsher struct efx_channel *channel; 1984874aeea5SJeff Kirsher 1985874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) 1986874aeea5SJeff Kirsher efx_fini_napi_channel(channel); 1987874aeea5SJeff Kirsher } 1988874aeea5SJeff Kirsher 1989874aeea5SJeff Kirsher /************************************************************************** 1990874aeea5SJeff Kirsher * 1991874aeea5SJeff Kirsher * Kernel netpoll interface 1992874aeea5SJeff Kirsher * 1993874aeea5SJeff Kirsher *************************************************************************/ 1994874aeea5SJeff Kirsher 1995874aeea5SJeff Kirsher #ifdef CONFIG_NET_POLL_CONTROLLER 1996874aeea5SJeff Kirsher 1997874aeea5SJeff Kirsher /* Although in the common case interrupts will be disabled, this is not 1998874aeea5SJeff Kirsher * guaranteed. However, all our work happens inside the NAPI callback, 1999874aeea5SJeff Kirsher * so no locking is required. 2000874aeea5SJeff Kirsher */ 2001874aeea5SJeff Kirsher static void efx_netpoll(struct net_device *net_dev) 2002874aeea5SJeff Kirsher { 2003874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 2004874aeea5SJeff Kirsher struct efx_channel *channel; 2005874aeea5SJeff Kirsher 2006874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) 2007874aeea5SJeff Kirsher efx_schedule_channel(channel); 2008874aeea5SJeff Kirsher } 2009874aeea5SJeff Kirsher 2010874aeea5SJeff Kirsher #endif 2011874aeea5SJeff Kirsher 2012874aeea5SJeff Kirsher /************************************************************************** 2013874aeea5SJeff Kirsher * 2014874aeea5SJeff Kirsher * Kernel net device interface 2015874aeea5SJeff Kirsher * 2016874aeea5SJeff Kirsher *************************************************************************/ 2017874aeea5SJeff Kirsher 2018874aeea5SJeff Kirsher /* Context: process, rtnl_lock() held. */ 2019874aeea5SJeff Kirsher static int efx_net_open(struct net_device *net_dev) 2020874aeea5SJeff Kirsher { 2021874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 20228b7325b4SBen Hutchings int rc; 20238b7325b4SBen Hutchings 2024874aeea5SJeff Kirsher netif_dbg(efx, ifup, efx->net_dev, "opening device on CPU %d\n", 2025874aeea5SJeff Kirsher raw_smp_processor_id()); 2026874aeea5SJeff Kirsher 20278b7325b4SBen Hutchings rc = efx_check_disabled(efx); 20288b7325b4SBen Hutchings if (rc) 20298b7325b4SBen Hutchings return rc; 2030874aeea5SJeff Kirsher if (efx->phy_mode & PHY_MODE_SPECIAL) 2031874aeea5SJeff Kirsher return -EBUSY; 2032874aeea5SJeff Kirsher if (efx_mcdi_poll_reboot(efx) && efx_reset(efx, RESET_TYPE_ALL)) 2033874aeea5SJeff Kirsher return -EIO; 2034874aeea5SJeff Kirsher 2035874aeea5SJeff Kirsher /* Notify the kernel of the link state polled during driver load, 2036874aeea5SJeff Kirsher * before the monitor starts running */ 2037874aeea5SJeff Kirsher efx_link_status_changed(efx); 2038874aeea5SJeff Kirsher 2039874aeea5SJeff Kirsher efx_start_all(efx); 2040dd40781eSBen Hutchings efx_selftest_async_start(efx); 2041874aeea5SJeff Kirsher return 0; 2042874aeea5SJeff Kirsher } 2043874aeea5SJeff Kirsher 2044874aeea5SJeff Kirsher /* Context: process, rtnl_lock() held. 2045874aeea5SJeff Kirsher * Note that the kernel will ignore our return code; this method 2046874aeea5SJeff Kirsher * should really be a void. 2047874aeea5SJeff Kirsher */ 2048874aeea5SJeff Kirsher static int efx_net_stop(struct net_device *net_dev) 2049874aeea5SJeff Kirsher { 2050874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 2051874aeea5SJeff Kirsher 2052874aeea5SJeff Kirsher netif_dbg(efx, ifdown, efx->net_dev, "closing on CPU %d\n", 2053874aeea5SJeff Kirsher raw_smp_processor_id()); 2054874aeea5SJeff Kirsher 2055874aeea5SJeff Kirsher /* Stop the device and flush all the channels */ 2056874aeea5SJeff Kirsher efx_stop_all(efx); 2057874aeea5SJeff Kirsher 2058874aeea5SJeff Kirsher return 0; 2059874aeea5SJeff Kirsher } 2060874aeea5SJeff Kirsher 2061874aeea5SJeff Kirsher /* Context: process, dev_base_lock or RTNL held, non-blocking. */ 20622aa9ef11SBen Hutchings static struct rtnl_link_stats64 *efx_net_stats(struct net_device *net_dev, 20632aa9ef11SBen Hutchings struct rtnl_link_stats64 *stats) 2064874aeea5SJeff Kirsher { 2065874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 2066874aeea5SJeff Kirsher 2067874aeea5SJeff Kirsher spin_lock_bh(&efx->stats_lock); 2068cd0ecc9aSBen Hutchings efx->type->update_stats(efx, NULL, stats); 20691cb34522SBen Hutchings spin_unlock_bh(&efx->stats_lock); 20701cb34522SBen Hutchings 2071874aeea5SJeff Kirsher return stats; 2072874aeea5SJeff Kirsher } 2073874aeea5SJeff Kirsher 2074874aeea5SJeff Kirsher /* Context: netif_tx_lock held, BHs disabled. */ 2075874aeea5SJeff Kirsher static void efx_watchdog(struct net_device *net_dev) 2076874aeea5SJeff Kirsher { 2077874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 2078874aeea5SJeff Kirsher 2079874aeea5SJeff Kirsher netif_err(efx, tx_err, efx->net_dev, 2080874aeea5SJeff Kirsher "TX stuck with port_enabled=%d: resetting channels\n", 2081874aeea5SJeff Kirsher efx->port_enabled); 2082874aeea5SJeff Kirsher 2083874aeea5SJeff Kirsher efx_schedule_reset(efx, RESET_TYPE_TX_WATCHDOG); 2084874aeea5SJeff Kirsher } 2085874aeea5SJeff Kirsher 2086874aeea5SJeff Kirsher 2087874aeea5SJeff Kirsher /* Context: process, rtnl_lock() held. */ 2088874aeea5SJeff Kirsher static int efx_change_mtu(struct net_device *net_dev, int new_mtu) 2089874aeea5SJeff Kirsher { 2090874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 20918b7325b4SBen Hutchings int rc; 2092874aeea5SJeff Kirsher 20938b7325b4SBen Hutchings rc = efx_check_disabled(efx); 20948b7325b4SBen Hutchings if (rc) 20958b7325b4SBen Hutchings return rc; 2096874aeea5SJeff Kirsher if (new_mtu > EFX_MAX_MTU) 2097874aeea5SJeff Kirsher return -EINVAL; 2098874aeea5SJeff Kirsher 2099874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "changing MTU to %d\n", new_mtu); 2100874aeea5SJeff Kirsher 210129c69a48SBen Hutchings efx_device_detach_sync(efx); 210229c69a48SBen Hutchings efx_stop_all(efx); 210329c69a48SBen Hutchings 2104874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 2105874aeea5SJeff Kirsher net_dev->mtu = new_mtu; 2106710b208dSBen Hutchings efx->type->reconfigure_mac(efx); 2107874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 2108874aeea5SJeff Kirsher 2109874aeea5SJeff Kirsher efx_start_all(efx); 211029c69a48SBen Hutchings netif_device_attach(efx->net_dev); 21116c8eef4aSBen Hutchings return 0; 2112874aeea5SJeff Kirsher } 2113874aeea5SJeff Kirsher 2114874aeea5SJeff Kirsher static int efx_set_mac_address(struct net_device *net_dev, void *data) 2115874aeea5SJeff Kirsher { 2116874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 2117874aeea5SJeff Kirsher struct sockaddr *addr = data; 2118874aeea5SJeff Kirsher char *new_addr = addr->sa_data; 2119874aeea5SJeff Kirsher 2120874aeea5SJeff Kirsher if (!is_valid_ether_addr(new_addr)) { 2121874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, 2122874aeea5SJeff Kirsher "invalid ethernet MAC address requested: %pM\n", 2123874aeea5SJeff Kirsher new_addr); 2124504f9b5aSDanny Kukawka return -EADDRNOTAVAIL; 2125874aeea5SJeff Kirsher } 2126874aeea5SJeff Kirsher 2127874aeea5SJeff Kirsher memcpy(net_dev->dev_addr, new_addr, net_dev->addr_len); 2128cd2d5b52SBen Hutchings efx_sriov_mac_address_changed(efx); 2129874aeea5SJeff Kirsher 2130874aeea5SJeff Kirsher /* Reconfigure the MAC */ 2131874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 2132710b208dSBen Hutchings efx->type->reconfigure_mac(efx); 2133874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 2134874aeea5SJeff Kirsher 2135874aeea5SJeff Kirsher return 0; 2136874aeea5SJeff Kirsher } 2137874aeea5SJeff Kirsher 2138874aeea5SJeff Kirsher /* Context: netif_addr_lock held, BHs disabled. */ 21390fca8c97SBen Hutchings static void efx_set_rx_mode(struct net_device *net_dev) 2140874aeea5SJeff Kirsher { 2141874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 2142874aeea5SJeff Kirsher 2143874aeea5SJeff Kirsher if (efx->port_enabled) 2144874aeea5SJeff Kirsher queue_work(efx->workqueue, &efx->mac_work); 2145874aeea5SJeff Kirsher /* Otherwise efx_start_port() will do this */ 2146874aeea5SJeff Kirsher } 2147874aeea5SJeff Kirsher 2148c8f44affSMichał Mirosław static int efx_set_features(struct net_device *net_dev, netdev_features_t data) 2149874aeea5SJeff Kirsher { 2150874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 2151874aeea5SJeff Kirsher 2152874aeea5SJeff Kirsher /* If disabling RX n-tuple filtering, clear existing filters */ 2153874aeea5SJeff Kirsher if (net_dev->features & ~data & NETIF_F_NTUPLE) 2154fbd79120SBen Hutchings return efx->type->filter_clear_rx(efx, EFX_FILTER_PRI_MANUAL); 2155874aeea5SJeff Kirsher 2156874aeea5SJeff Kirsher return 0; 2157874aeea5SJeff Kirsher } 2158874aeea5SJeff Kirsher 21598127d661SBen Hutchings static const struct net_device_ops efx_farch_netdev_ops = { 2160874aeea5SJeff Kirsher .ndo_open = efx_net_open, 2161874aeea5SJeff Kirsher .ndo_stop = efx_net_stop, 2162874aeea5SJeff Kirsher .ndo_get_stats64 = efx_net_stats, 2163874aeea5SJeff Kirsher .ndo_tx_timeout = efx_watchdog, 2164874aeea5SJeff Kirsher .ndo_start_xmit = efx_hard_start_xmit, 2165874aeea5SJeff Kirsher .ndo_validate_addr = eth_validate_addr, 2166874aeea5SJeff Kirsher .ndo_do_ioctl = efx_ioctl, 2167874aeea5SJeff Kirsher .ndo_change_mtu = efx_change_mtu, 2168874aeea5SJeff Kirsher .ndo_set_mac_address = efx_set_mac_address, 21690fca8c97SBen Hutchings .ndo_set_rx_mode = efx_set_rx_mode, 2170874aeea5SJeff Kirsher .ndo_set_features = efx_set_features, 2171cd2d5b52SBen Hutchings #ifdef CONFIG_SFC_SRIOV 2172cd2d5b52SBen Hutchings .ndo_set_vf_mac = efx_sriov_set_vf_mac, 2173cd2d5b52SBen Hutchings .ndo_set_vf_vlan = efx_sriov_set_vf_vlan, 2174cd2d5b52SBen Hutchings .ndo_set_vf_spoofchk = efx_sriov_set_vf_spoofchk, 2175cd2d5b52SBen Hutchings .ndo_get_vf_config = efx_sriov_get_vf_config, 2176cd2d5b52SBen Hutchings #endif 2177874aeea5SJeff Kirsher #ifdef CONFIG_NET_POLL_CONTROLLER 2178874aeea5SJeff Kirsher .ndo_poll_controller = efx_netpoll, 2179874aeea5SJeff Kirsher #endif 2180874aeea5SJeff Kirsher .ndo_setup_tc = efx_setup_tc, 2181874aeea5SJeff Kirsher #ifdef CONFIG_RFS_ACCEL 2182874aeea5SJeff Kirsher .ndo_rx_flow_steer = efx_filter_rfs, 2183874aeea5SJeff Kirsher #endif 2184874aeea5SJeff Kirsher }; 2185874aeea5SJeff Kirsher 21868127d661SBen Hutchings static const struct net_device_ops efx_ef10_netdev_ops = { 21878127d661SBen Hutchings .ndo_open = efx_net_open, 21888127d661SBen Hutchings .ndo_stop = efx_net_stop, 21898127d661SBen Hutchings .ndo_get_stats64 = efx_net_stats, 21908127d661SBen Hutchings .ndo_tx_timeout = efx_watchdog, 21918127d661SBen Hutchings .ndo_start_xmit = efx_hard_start_xmit, 21928127d661SBen Hutchings .ndo_validate_addr = eth_validate_addr, 21938127d661SBen Hutchings .ndo_do_ioctl = efx_ioctl, 21948127d661SBen Hutchings .ndo_change_mtu = efx_change_mtu, 21958127d661SBen Hutchings .ndo_set_mac_address = efx_set_mac_address, 21968127d661SBen Hutchings .ndo_set_rx_mode = efx_set_rx_mode, 21978127d661SBen Hutchings .ndo_set_features = efx_set_features, 21988127d661SBen Hutchings #ifdef CONFIG_NET_POLL_CONTROLLER 21998127d661SBen Hutchings .ndo_poll_controller = efx_netpoll, 22008127d661SBen Hutchings #endif 22018127d661SBen Hutchings #ifdef CONFIG_RFS_ACCEL 22028127d661SBen Hutchings .ndo_rx_flow_steer = efx_filter_rfs, 22038127d661SBen Hutchings #endif 22048127d661SBen Hutchings }; 22058127d661SBen Hutchings 2206874aeea5SJeff Kirsher static void efx_update_name(struct efx_nic *efx) 2207874aeea5SJeff Kirsher { 2208874aeea5SJeff Kirsher strcpy(efx->name, efx->net_dev->name); 2209874aeea5SJeff Kirsher efx_mtd_rename(efx); 2210874aeea5SJeff Kirsher efx_set_channel_names(efx); 2211874aeea5SJeff Kirsher } 2212874aeea5SJeff Kirsher 2213874aeea5SJeff Kirsher static int efx_netdev_event(struct notifier_block *this, 2214874aeea5SJeff Kirsher unsigned long event, void *ptr) 2215874aeea5SJeff Kirsher { 2216351638e7SJiri Pirko struct net_device *net_dev = netdev_notifier_info_to_dev(ptr); 2217874aeea5SJeff Kirsher 22188127d661SBen Hutchings if ((net_dev->netdev_ops == &efx_farch_netdev_ops || 22198127d661SBen Hutchings net_dev->netdev_ops == &efx_ef10_netdev_ops) && 2220874aeea5SJeff Kirsher event == NETDEV_CHANGENAME) 2221874aeea5SJeff Kirsher efx_update_name(netdev_priv(net_dev)); 2222874aeea5SJeff Kirsher 2223874aeea5SJeff Kirsher return NOTIFY_DONE; 2224874aeea5SJeff Kirsher } 2225874aeea5SJeff Kirsher 2226874aeea5SJeff Kirsher static struct notifier_block efx_netdev_notifier = { 2227874aeea5SJeff Kirsher .notifier_call = efx_netdev_event, 2228874aeea5SJeff Kirsher }; 2229874aeea5SJeff Kirsher 2230874aeea5SJeff Kirsher static ssize_t 2231874aeea5SJeff Kirsher show_phy_type(struct device *dev, struct device_attribute *attr, char *buf) 2232874aeea5SJeff Kirsher { 2233874aeea5SJeff Kirsher struct efx_nic *efx = pci_get_drvdata(to_pci_dev(dev)); 2234874aeea5SJeff Kirsher return sprintf(buf, "%d\n", efx->phy_type); 2235874aeea5SJeff Kirsher } 2236776fbcc9SBen Hutchings static DEVICE_ATTR(phy_type, 0444, show_phy_type, NULL); 2237874aeea5SJeff Kirsher 2238874aeea5SJeff Kirsher static int efx_register_netdev(struct efx_nic *efx) 2239874aeea5SJeff Kirsher { 2240874aeea5SJeff Kirsher struct net_device *net_dev = efx->net_dev; 2241874aeea5SJeff Kirsher struct efx_channel *channel; 2242874aeea5SJeff Kirsher int rc; 2243874aeea5SJeff Kirsher 2244874aeea5SJeff Kirsher net_dev->watchdog_timeo = 5 * HZ; 2245874aeea5SJeff Kirsher net_dev->irq = efx->pci_dev->irq; 22468127d661SBen Hutchings if (efx_nic_rev(efx) >= EFX_REV_HUNT_A0) { 22478127d661SBen Hutchings net_dev->netdev_ops = &efx_ef10_netdev_ops; 22488127d661SBen Hutchings net_dev->priv_flags |= IFF_UNICAST_FLT; 22498127d661SBen Hutchings } else { 22508127d661SBen Hutchings net_dev->netdev_ops = &efx_farch_netdev_ops; 22518127d661SBen Hutchings } 2252874aeea5SJeff Kirsher SET_ETHTOOL_OPS(net_dev, &efx_ethtool_ops); 22537e6d06f0SBen Hutchings net_dev->gso_max_segs = EFX_TSO_MAX_SEGS; 2254874aeea5SJeff Kirsher 2255874aeea5SJeff Kirsher rtnl_lock(); 2256874aeea5SJeff Kirsher 22577153f623SBen Hutchings /* Enable resets to be scheduled and check whether any were 22587153f623SBen Hutchings * already requested. If so, the NIC is probably hosed so we 22597153f623SBen Hutchings * abort. 22607153f623SBen Hutchings */ 22617153f623SBen Hutchings efx->state = STATE_READY; 22627153f623SBen Hutchings smp_mb(); /* ensure we change state before checking reset_pending */ 22637153f623SBen Hutchings if (efx->reset_pending) { 22647153f623SBen Hutchings netif_err(efx, probe, efx->net_dev, 22657153f623SBen Hutchings "aborting probe due to scheduled reset\n"); 22667153f623SBen Hutchings rc = -EIO; 22677153f623SBen Hutchings goto fail_locked; 22687153f623SBen Hutchings } 22697153f623SBen Hutchings 2270874aeea5SJeff Kirsher rc = dev_alloc_name(net_dev, net_dev->name); 2271874aeea5SJeff Kirsher if (rc < 0) 2272874aeea5SJeff Kirsher goto fail_locked; 2273874aeea5SJeff Kirsher efx_update_name(efx); 2274874aeea5SJeff Kirsher 22758f8b3d51SBen Hutchings /* Always start with carrier off; PHY events will detect the link */ 22768f8b3d51SBen Hutchings netif_carrier_off(net_dev); 22778f8b3d51SBen Hutchings 2278874aeea5SJeff Kirsher rc = register_netdevice(net_dev); 2279874aeea5SJeff Kirsher if (rc) 2280874aeea5SJeff Kirsher goto fail_locked; 2281874aeea5SJeff Kirsher 2282874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) { 2283874aeea5SJeff Kirsher struct efx_tx_queue *tx_queue; 2284874aeea5SJeff Kirsher efx_for_each_channel_tx_queue(tx_queue, channel) 2285874aeea5SJeff Kirsher efx_init_tx_queue_core_txq(tx_queue); 2286874aeea5SJeff Kirsher } 2287874aeea5SJeff Kirsher 22880bcf4a64SBen Hutchings efx_associate(efx); 22890bcf4a64SBen Hutchings 2290874aeea5SJeff Kirsher rtnl_unlock(); 2291874aeea5SJeff Kirsher 2292874aeea5SJeff Kirsher rc = device_create_file(&efx->pci_dev->dev, &dev_attr_phy_type); 2293874aeea5SJeff Kirsher if (rc) { 2294874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, 2295874aeea5SJeff Kirsher "failed to init net dev attributes\n"); 2296874aeea5SJeff Kirsher goto fail_registered; 2297874aeea5SJeff Kirsher } 2298874aeea5SJeff Kirsher 2299874aeea5SJeff Kirsher return 0; 2300874aeea5SJeff Kirsher 23017153f623SBen Hutchings fail_registered: 23027153f623SBen Hutchings rtnl_lock(); 23030bcf4a64SBen Hutchings efx_dissociate(efx); 23047153f623SBen Hutchings unregister_netdevice(net_dev); 2305874aeea5SJeff Kirsher fail_locked: 23067153f623SBen Hutchings efx->state = STATE_UNINIT; 2307874aeea5SJeff Kirsher rtnl_unlock(); 2308874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, "could not register net dev\n"); 2309874aeea5SJeff Kirsher return rc; 2310874aeea5SJeff Kirsher } 2311874aeea5SJeff Kirsher 2312874aeea5SJeff Kirsher static void efx_unregister_netdev(struct efx_nic *efx) 2313874aeea5SJeff Kirsher { 2314874aeea5SJeff Kirsher if (!efx->net_dev) 2315874aeea5SJeff Kirsher return; 2316874aeea5SJeff Kirsher 2317874aeea5SJeff Kirsher BUG_ON(netdev_priv(efx->net_dev) != efx); 2318874aeea5SJeff Kirsher 2319874aeea5SJeff Kirsher strlcpy(efx->name, pci_name(efx->pci_dev), sizeof(efx->name)); 2320874aeea5SJeff Kirsher device_remove_file(&efx->pci_dev->dev, &dev_attr_phy_type); 23217153f623SBen Hutchings 23227153f623SBen Hutchings rtnl_lock(); 23237153f623SBen Hutchings unregister_netdevice(efx->net_dev); 23247153f623SBen Hutchings efx->state = STATE_UNINIT; 23257153f623SBen Hutchings rtnl_unlock(); 2326874aeea5SJeff Kirsher } 2327874aeea5SJeff Kirsher 2328874aeea5SJeff Kirsher /************************************************************************** 2329874aeea5SJeff Kirsher * 2330874aeea5SJeff Kirsher * Device reset and suspend 2331874aeea5SJeff Kirsher * 2332874aeea5SJeff Kirsher **************************************************************************/ 2333874aeea5SJeff Kirsher 2334874aeea5SJeff Kirsher /* Tears down the entire software state and most of the hardware state 2335874aeea5SJeff Kirsher * before reset. */ 2336874aeea5SJeff Kirsher void efx_reset_down(struct efx_nic *efx, enum reset_type method) 2337874aeea5SJeff Kirsher { 2338874aeea5SJeff Kirsher EFX_ASSERT_RESET_SERIALISED(efx); 2339874aeea5SJeff Kirsher 2340874aeea5SJeff Kirsher efx_stop_all(efx); 2341d8291187SBen Hutchings efx_disable_interrupts(efx); 23425642ceefSBen Hutchings 23435642ceefSBen Hutchings mutex_lock(&efx->mac_lock); 2344874aeea5SJeff Kirsher if (efx->port_initialized && method != RESET_TYPE_INVISIBLE) 2345874aeea5SJeff Kirsher efx->phy_op->fini(efx); 2346874aeea5SJeff Kirsher efx->type->fini(efx); 2347874aeea5SJeff Kirsher } 2348874aeea5SJeff Kirsher 2349874aeea5SJeff Kirsher /* This function will always ensure that the locks acquired in 2350874aeea5SJeff Kirsher * efx_reset_down() are released. A failure return code indicates 2351874aeea5SJeff Kirsher * that we were unable to reinitialise the hardware, and the 2352874aeea5SJeff Kirsher * driver should be disabled. If ok is false, then the rx and tx 2353874aeea5SJeff Kirsher * engines are not restarted, pending a RESET_DISABLE. */ 2354874aeea5SJeff Kirsher int efx_reset_up(struct efx_nic *efx, enum reset_type method, bool ok) 2355874aeea5SJeff Kirsher { 2356874aeea5SJeff Kirsher int rc; 2357874aeea5SJeff Kirsher 2358874aeea5SJeff Kirsher EFX_ASSERT_RESET_SERIALISED(efx); 2359874aeea5SJeff Kirsher 2360874aeea5SJeff Kirsher rc = efx->type->init(efx); 2361874aeea5SJeff Kirsher if (rc) { 2362874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, "failed to initialise NIC\n"); 2363874aeea5SJeff Kirsher goto fail; 2364874aeea5SJeff Kirsher } 2365874aeea5SJeff Kirsher 2366874aeea5SJeff Kirsher if (!ok) 2367874aeea5SJeff Kirsher goto fail; 2368874aeea5SJeff Kirsher 2369874aeea5SJeff Kirsher if (efx->port_initialized && method != RESET_TYPE_INVISIBLE) { 2370874aeea5SJeff Kirsher rc = efx->phy_op->init(efx); 2371874aeea5SJeff Kirsher if (rc) 2372874aeea5SJeff Kirsher goto fail; 2373874aeea5SJeff Kirsher if (efx->phy_op->reconfigure(efx)) 2374874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, 2375874aeea5SJeff Kirsher "could not restore PHY settings\n"); 2376874aeea5SJeff Kirsher } 2377874aeea5SJeff Kirsher 2378261e4d96SJon Cooper rc = efx_enable_interrupts(efx); 2379261e4d96SJon Cooper if (rc) 2380261e4d96SJon Cooper goto fail; 2381874aeea5SJeff Kirsher efx_restore_filters(efx); 2382cd2d5b52SBen Hutchings efx_sriov_reset(efx); 2383874aeea5SJeff Kirsher 2384874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 2385874aeea5SJeff Kirsher 2386874aeea5SJeff Kirsher efx_start_all(efx); 2387874aeea5SJeff Kirsher 2388874aeea5SJeff Kirsher return 0; 2389874aeea5SJeff Kirsher 2390874aeea5SJeff Kirsher fail: 2391874aeea5SJeff Kirsher efx->port_initialized = false; 2392874aeea5SJeff Kirsher 2393874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 2394874aeea5SJeff Kirsher 2395874aeea5SJeff Kirsher return rc; 2396874aeea5SJeff Kirsher } 2397874aeea5SJeff Kirsher 2398874aeea5SJeff Kirsher /* Reset the NIC using the specified method. Note that the reset may 2399874aeea5SJeff Kirsher * fail, in which case the card will be left in an unusable state. 2400874aeea5SJeff Kirsher * 2401874aeea5SJeff Kirsher * Caller must hold the rtnl_lock. 2402874aeea5SJeff Kirsher */ 2403874aeea5SJeff Kirsher int efx_reset(struct efx_nic *efx, enum reset_type method) 2404874aeea5SJeff Kirsher { 2405874aeea5SJeff Kirsher int rc, rc2; 2406874aeea5SJeff Kirsher bool disabled; 2407874aeea5SJeff Kirsher 2408874aeea5SJeff Kirsher netif_info(efx, drv, efx->net_dev, "resetting (%s)\n", 2409874aeea5SJeff Kirsher RESET_TYPE(method)); 2410874aeea5SJeff Kirsher 2411c2f3b8e3SDaniel Pieczko efx_device_detach_sync(efx); 2412874aeea5SJeff Kirsher efx_reset_down(efx, method); 2413874aeea5SJeff Kirsher 2414874aeea5SJeff Kirsher rc = efx->type->reset(efx, method); 2415874aeea5SJeff Kirsher if (rc) { 2416874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, "failed to reset hardware\n"); 2417874aeea5SJeff Kirsher goto out; 2418874aeea5SJeff Kirsher } 2419874aeea5SJeff Kirsher 2420874aeea5SJeff Kirsher /* Clear flags for the scopes we covered. We assume the NIC and 2421874aeea5SJeff Kirsher * driver are now quiescent so that there is no race here. 2422874aeea5SJeff Kirsher */ 2423874aeea5SJeff Kirsher efx->reset_pending &= -(1 << (method + 1)); 2424874aeea5SJeff Kirsher 2425874aeea5SJeff Kirsher /* Reinitialise bus-mastering, which may have been turned off before 2426874aeea5SJeff Kirsher * the reset was scheduled. This is still appropriate, even in the 2427874aeea5SJeff Kirsher * RESET_TYPE_DISABLE since this driver generally assumes the hardware 2428874aeea5SJeff Kirsher * can respond to requests. */ 2429874aeea5SJeff Kirsher pci_set_master(efx->pci_dev); 2430874aeea5SJeff Kirsher 2431874aeea5SJeff Kirsher out: 2432874aeea5SJeff Kirsher /* Leave device stopped if necessary */ 2433626950dbSAlexandre Rames disabled = rc || 2434626950dbSAlexandre Rames method == RESET_TYPE_DISABLE || 2435626950dbSAlexandre Rames method == RESET_TYPE_RECOVER_OR_DISABLE; 2436874aeea5SJeff Kirsher rc2 = efx_reset_up(efx, method, !disabled); 2437874aeea5SJeff Kirsher if (rc2) { 2438874aeea5SJeff Kirsher disabled = true; 2439874aeea5SJeff Kirsher if (!rc) 2440874aeea5SJeff Kirsher rc = rc2; 2441874aeea5SJeff Kirsher } 2442874aeea5SJeff Kirsher 2443874aeea5SJeff Kirsher if (disabled) { 2444874aeea5SJeff Kirsher dev_close(efx->net_dev); 2445874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, "has been disabled\n"); 2446874aeea5SJeff Kirsher efx->state = STATE_DISABLED; 2447874aeea5SJeff Kirsher } else { 2448874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "reset complete\n"); 2449874aeea5SJeff Kirsher netif_device_attach(efx->net_dev); 2450874aeea5SJeff Kirsher } 2451874aeea5SJeff Kirsher return rc; 2452874aeea5SJeff Kirsher } 2453874aeea5SJeff Kirsher 2454626950dbSAlexandre Rames /* Try recovery mechanisms. 2455626950dbSAlexandre Rames * For now only EEH is supported. 2456626950dbSAlexandre Rames * Returns 0 if the recovery mechanisms are unsuccessful. 2457626950dbSAlexandre Rames * Returns a non-zero value otherwise. 2458626950dbSAlexandre Rames */ 2459b28405b0SAlexandre Rames int efx_try_recovery(struct efx_nic *efx) 2460626950dbSAlexandre Rames { 2461626950dbSAlexandre Rames #ifdef CONFIG_EEH 2462626950dbSAlexandre Rames /* A PCI error can occur and not be seen by EEH because nothing 2463626950dbSAlexandre Rames * happens on the PCI bus. In this case the driver may fail and 2464626950dbSAlexandre Rames * schedule a 'recover or reset', leading to this recovery handler. 2465626950dbSAlexandre Rames * Manually call the eeh failure check function. 2466626950dbSAlexandre Rames */ 2467626950dbSAlexandre Rames struct eeh_dev *eehdev = 2468626950dbSAlexandre Rames of_node_to_eeh_dev(pci_device_to_OF_node(efx->pci_dev)); 2469626950dbSAlexandre Rames 2470626950dbSAlexandre Rames if (eeh_dev_check_failure(eehdev)) { 2471626950dbSAlexandre Rames /* The EEH mechanisms will handle the error and reset the 2472626950dbSAlexandre Rames * device if necessary. 2473626950dbSAlexandre Rames */ 2474626950dbSAlexandre Rames return 1; 2475626950dbSAlexandre Rames } 2476626950dbSAlexandre Rames #endif 2477626950dbSAlexandre Rames return 0; 2478626950dbSAlexandre Rames } 2479626950dbSAlexandre Rames 248074cd60a4SJon Cooper static void efx_wait_for_bist_end(struct efx_nic *efx) 248174cd60a4SJon Cooper { 248274cd60a4SJon Cooper int i; 248374cd60a4SJon Cooper 248474cd60a4SJon Cooper for (i = 0; i < BIST_WAIT_DELAY_COUNT; ++i) { 248574cd60a4SJon Cooper if (efx_mcdi_poll_reboot(efx)) 248674cd60a4SJon Cooper goto out; 248774cd60a4SJon Cooper msleep(BIST_WAIT_DELAY_MS); 248874cd60a4SJon Cooper } 248974cd60a4SJon Cooper 249074cd60a4SJon Cooper netif_err(efx, drv, efx->net_dev, "Warning: No MC reboot after BIST mode\n"); 249174cd60a4SJon Cooper out: 249274cd60a4SJon Cooper /* Either way unset the BIST flag. If we found no reboot we probably 249374cd60a4SJon Cooper * won't recover, but we should try. 249474cd60a4SJon Cooper */ 249574cd60a4SJon Cooper efx->mc_bist_for_other_fn = false; 249674cd60a4SJon Cooper } 249774cd60a4SJon Cooper 2498874aeea5SJeff Kirsher /* The worker thread exists so that code that cannot sleep can 2499874aeea5SJeff Kirsher * schedule a reset for later. 2500874aeea5SJeff Kirsher */ 2501874aeea5SJeff Kirsher static void efx_reset_work(struct work_struct *data) 2502874aeea5SJeff Kirsher { 2503874aeea5SJeff Kirsher struct efx_nic *efx = container_of(data, struct efx_nic, reset_work); 2504626950dbSAlexandre Rames unsigned long pending; 2505626950dbSAlexandre Rames enum reset_type method; 2506626950dbSAlexandre Rames 2507626950dbSAlexandre Rames pending = ACCESS_ONCE(efx->reset_pending); 2508626950dbSAlexandre Rames method = fls(pending) - 1; 2509626950dbSAlexandre Rames 251074cd60a4SJon Cooper if (method == RESET_TYPE_MC_BIST) 251174cd60a4SJon Cooper efx_wait_for_bist_end(efx); 251274cd60a4SJon Cooper 2513626950dbSAlexandre Rames if ((method == RESET_TYPE_RECOVER_OR_DISABLE || 2514626950dbSAlexandre Rames method == RESET_TYPE_RECOVER_OR_ALL) && 2515626950dbSAlexandre Rames efx_try_recovery(efx)) 2516626950dbSAlexandre Rames return; 2517874aeea5SJeff Kirsher 2518874aeea5SJeff Kirsher if (!pending) 2519874aeea5SJeff Kirsher return; 2520874aeea5SJeff Kirsher 2521874aeea5SJeff Kirsher rtnl_lock(); 25227153f623SBen Hutchings 25237153f623SBen Hutchings /* We checked the state in efx_schedule_reset() but it may 25247153f623SBen Hutchings * have changed by now. Now that we have the RTNL lock, 25257153f623SBen Hutchings * it cannot change again. 25267153f623SBen Hutchings */ 25277153f623SBen Hutchings if (efx->state == STATE_READY) 2528626950dbSAlexandre Rames (void)efx_reset(efx, method); 25297153f623SBen Hutchings 2530874aeea5SJeff Kirsher rtnl_unlock(); 2531874aeea5SJeff Kirsher } 2532874aeea5SJeff Kirsher 2533874aeea5SJeff Kirsher void efx_schedule_reset(struct efx_nic *efx, enum reset_type type) 2534874aeea5SJeff Kirsher { 2535874aeea5SJeff Kirsher enum reset_type method; 2536874aeea5SJeff Kirsher 2537626950dbSAlexandre Rames if (efx->state == STATE_RECOVERY) { 2538626950dbSAlexandre Rames netif_dbg(efx, drv, efx->net_dev, 2539626950dbSAlexandre Rames "recovering: skip scheduling %s reset\n", 2540626950dbSAlexandre Rames RESET_TYPE(type)); 2541626950dbSAlexandre Rames return; 2542626950dbSAlexandre Rames } 2543626950dbSAlexandre Rames 2544874aeea5SJeff Kirsher switch (type) { 2545874aeea5SJeff Kirsher case RESET_TYPE_INVISIBLE: 2546874aeea5SJeff Kirsher case RESET_TYPE_ALL: 2547626950dbSAlexandre Rames case RESET_TYPE_RECOVER_OR_ALL: 2548874aeea5SJeff Kirsher case RESET_TYPE_WORLD: 2549874aeea5SJeff Kirsher case RESET_TYPE_DISABLE: 2550626950dbSAlexandre Rames case RESET_TYPE_RECOVER_OR_DISABLE: 255174cd60a4SJon Cooper case RESET_TYPE_MC_BIST: 2552874aeea5SJeff Kirsher method = type; 2553874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "scheduling %s reset\n", 2554874aeea5SJeff Kirsher RESET_TYPE(method)); 2555874aeea5SJeff Kirsher break; 2556874aeea5SJeff Kirsher default: 2557874aeea5SJeff Kirsher method = efx->type->map_reset_reason(type); 2558874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, 2559874aeea5SJeff Kirsher "scheduling %s reset for %s\n", 2560874aeea5SJeff Kirsher RESET_TYPE(method), RESET_TYPE(type)); 2561874aeea5SJeff Kirsher break; 2562874aeea5SJeff Kirsher } 2563874aeea5SJeff Kirsher 2564874aeea5SJeff Kirsher set_bit(method, &efx->reset_pending); 25657153f623SBen Hutchings smp_mb(); /* ensure we change reset_pending before checking state */ 25667153f623SBen Hutchings 25677153f623SBen Hutchings /* If we're not READY then just leave the flags set as the cue 25687153f623SBen Hutchings * to abort probing or reschedule the reset later. 25697153f623SBen Hutchings */ 25707153f623SBen Hutchings if (ACCESS_ONCE(efx->state) != STATE_READY) 25717153f623SBen Hutchings return; 2572874aeea5SJeff Kirsher 2573874aeea5SJeff Kirsher /* efx_process_channel() will no longer read events once a 2574874aeea5SJeff Kirsher * reset is scheduled. So switch back to poll'd MCDI completions. */ 2575874aeea5SJeff Kirsher efx_mcdi_mode_poll(efx); 2576874aeea5SJeff Kirsher 2577874aeea5SJeff Kirsher queue_work(reset_workqueue, &efx->reset_work); 2578874aeea5SJeff Kirsher } 2579874aeea5SJeff Kirsher 2580874aeea5SJeff Kirsher /************************************************************************** 2581874aeea5SJeff Kirsher * 2582874aeea5SJeff Kirsher * List of NICs we support 2583874aeea5SJeff Kirsher * 2584874aeea5SJeff Kirsher **************************************************************************/ 2585874aeea5SJeff Kirsher 2586874aeea5SJeff Kirsher /* PCI device ID table */ 2587874aeea5SJeff Kirsher static DEFINE_PCI_DEVICE_TABLE(efx_pci_table) = { 25880e59e7e7SLinus Torvalds {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 25890e59e7e7SLinus Torvalds PCI_DEVICE_ID_SOLARFLARE_SFC4000A_0), 2590874aeea5SJeff Kirsher .driver_data = (unsigned long) &falcon_a1_nic_type}, 25910e59e7e7SLinus Torvalds {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 25920e59e7e7SLinus Torvalds PCI_DEVICE_ID_SOLARFLARE_SFC4000B), 2593874aeea5SJeff Kirsher .driver_data = (unsigned long) &falcon_b0_nic_type}, 2594547c474fSBen Hutchings {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0803), /* SFC9020 */ 2595874aeea5SJeff Kirsher .driver_data = (unsigned long) &siena_a0_nic_type}, 2596547c474fSBen Hutchings {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0813), /* SFL9021 */ 2597874aeea5SJeff Kirsher .driver_data = (unsigned long) &siena_a0_nic_type}, 25988127d661SBen Hutchings {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0903), /* SFC9120 PF */ 25998127d661SBen Hutchings .driver_data = (unsigned long) &efx_hunt_a0_nic_type}, 2600874aeea5SJeff Kirsher {0} /* end of list */ 2601874aeea5SJeff Kirsher }; 2602874aeea5SJeff Kirsher 2603874aeea5SJeff Kirsher /************************************************************************** 2604874aeea5SJeff Kirsher * 2605874aeea5SJeff Kirsher * Dummy PHY/MAC operations 2606874aeea5SJeff Kirsher * 2607874aeea5SJeff Kirsher * Can be used for some unimplemented operations 2608874aeea5SJeff Kirsher * Needed so all function pointers are valid and do not have to be tested 2609874aeea5SJeff Kirsher * before use 2610874aeea5SJeff Kirsher * 2611874aeea5SJeff Kirsher **************************************************************************/ 2612874aeea5SJeff Kirsher int efx_port_dummy_op_int(struct efx_nic *efx) 2613874aeea5SJeff Kirsher { 2614874aeea5SJeff Kirsher return 0; 2615874aeea5SJeff Kirsher } 2616874aeea5SJeff Kirsher void efx_port_dummy_op_void(struct efx_nic *efx) {} 2617874aeea5SJeff Kirsher 2618874aeea5SJeff Kirsher static bool efx_port_dummy_op_poll(struct efx_nic *efx) 2619874aeea5SJeff Kirsher { 2620874aeea5SJeff Kirsher return false; 2621874aeea5SJeff Kirsher } 2622874aeea5SJeff Kirsher 2623874aeea5SJeff Kirsher static const struct efx_phy_operations efx_dummy_phy_operations = { 2624874aeea5SJeff Kirsher .init = efx_port_dummy_op_int, 2625874aeea5SJeff Kirsher .reconfigure = efx_port_dummy_op_int, 2626874aeea5SJeff Kirsher .poll = efx_port_dummy_op_poll, 2627874aeea5SJeff Kirsher .fini = efx_port_dummy_op_void, 2628874aeea5SJeff Kirsher }; 2629874aeea5SJeff Kirsher 2630874aeea5SJeff Kirsher /************************************************************************** 2631874aeea5SJeff Kirsher * 2632874aeea5SJeff Kirsher * Data housekeeping 2633874aeea5SJeff Kirsher * 2634874aeea5SJeff Kirsher **************************************************************************/ 2635874aeea5SJeff Kirsher 2636874aeea5SJeff Kirsher /* This zeroes out and then fills in the invariants in a struct 2637874aeea5SJeff Kirsher * efx_nic (including all sub-structures). 2638874aeea5SJeff Kirsher */ 2639adeb15aaSBen Hutchings static int efx_init_struct(struct efx_nic *efx, 2640874aeea5SJeff Kirsher struct pci_dev *pci_dev, struct net_device *net_dev) 2641874aeea5SJeff Kirsher { 2642874aeea5SJeff Kirsher int i; 2643874aeea5SJeff Kirsher 2644874aeea5SJeff Kirsher /* Initialise common structures */ 26450bcf4a64SBen Hutchings INIT_LIST_HEAD(&efx->node); 26460bcf4a64SBen Hutchings INIT_LIST_HEAD(&efx->secondary_list); 2647874aeea5SJeff Kirsher spin_lock_init(&efx->biu_lock); 2648874aeea5SJeff Kirsher #ifdef CONFIG_SFC_MTD 2649874aeea5SJeff Kirsher INIT_LIST_HEAD(&efx->mtd_list); 2650874aeea5SJeff Kirsher #endif 2651874aeea5SJeff Kirsher INIT_WORK(&efx->reset_work, efx_reset_work); 2652874aeea5SJeff Kirsher INIT_DELAYED_WORK(&efx->monitor_work, efx_monitor); 2653dd40781eSBen Hutchings INIT_DELAYED_WORK(&efx->selftest_work, efx_selftest_async_work); 2654874aeea5SJeff Kirsher efx->pci_dev = pci_dev; 2655874aeea5SJeff Kirsher efx->msg_enable = debug; 2656f16aeea0SBen Hutchings efx->state = STATE_UNINIT; 2657874aeea5SJeff Kirsher strlcpy(efx->name, pci_name(pci_dev), sizeof(efx->name)); 2658874aeea5SJeff Kirsher 2659874aeea5SJeff Kirsher efx->net_dev = net_dev; 266043a3739dSJon Cooper efx->rx_prefix_size = efx->type->rx_prefix_size; 26612ec03014SAndrew Rybchenko efx->rx_ip_align = 26622ec03014SAndrew Rybchenko NET_IP_ALIGN ? (efx->rx_prefix_size + NET_IP_ALIGN) % 4 : 0; 266343a3739dSJon Cooper efx->rx_packet_hash_offset = 266443a3739dSJon Cooper efx->type->rx_hash_offset - efx->type->rx_prefix_size; 2665bd9a265dSJon Cooper efx->rx_packet_ts_offset = 2666bd9a265dSJon Cooper efx->type->rx_ts_offset - efx->type->rx_prefix_size; 2667874aeea5SJeff Kirsher spin_lock_init(&efx->stats_lock); 2668874aeea5SJeff Kirsher mutex_init(&efx->mac_lock); 2669874aeea5SJeff Kirsher efx->phy_op = &efx_dummy_phy_operations; 2670874aeea5SJeff Kirsher efx->mdio.dev = net_dev; 2671874aeea5SJeff Kirsher INIT_WORK(&efx->mac_work, efx_mac_work); 26729f2cb71cSBen Hutchings init_waitqueue_head(&efx->flush_wq); 2673874aeea5SJeff Kirsher 2674874aeea5SJeff Kirsher for (i = 0; i < EFX_MAX_CHANNELS; i++) { 2675874aeea5SJeff Kirsher efx->channel[i] = efx_alloc_channel(efx, i, NULL); 2676874aeea5SJeff Kirsher if (!efx->channel[i]) 2677874aeea5SJeff Kirsher goto fail; 2678d8291187SBen Hutchings efx->msi_context[i].efx = efx; 2679d8291187SBen Hutchings efx->msi_context[i].index = i; 2680874aeea5SJeff Kirsher } 2681874aeea5SJeff Kirsher 2682874aeea5SJeff Kirsher /* Higher numbered interrupt modes are less capable! */ 2683874aeea5SJeff Kirsher efx->interrupt_mode = max(efx->type->max_interrupt_mode, 2684874aeea5SJeff Kirsher interrupt_mode); 2685874aeea5SJeff Kirsher 2686874aeea5SJeff Kirsher /* Would be good to use the net_dev name, but we're too early */ 2687874aeea5SJeff Kirsher snprintf(efx->workqueue_name, sizeof(efx->workqueue_name), "sfc%s", 2688874aeea5SJeff Kirsher pci_name(pci_dev)); 2689874aeea5SJeff Kirsher efx->workqueue = create_singlethread_workqueue(efx->workqueue_name); 2690874aeea5SJeff Kirsher if (!efx->workqueue) 2691874aeea5SJeff Kirsher goto fail; 2692874aeea5SJeff Kirsher 2693874aeea5SJeff Kirsher return 0; 2694874aeea5SJeff Kirsher 2695874aeea5SJeff Kirsher fail: 2696874aeea5SJeff Kirsher efx_fini_struct(efx); 2697874aeea5SJeff Kirsher return -ENOMEM; 2698874aeea5SJeff Kirsher } 2699874aeea5SJeff Kirsher 2700874aeea5SJeff Kirsher static void efx_fini_struct(struct efx_nic *efx) 2701874aeea5SJeff Kirsher { 2702874aeea5SJeff Kirsher int i; 2703874aeea5SJeff Kirsher 2704874aeea5SJeff Kirsher for (i = 0; i < EFX_MAX_CHANNELS; i++) 2705874aeea5SJeff Kirsher kfree(efx->channel[i]); 2706874aeea5SJeff Kirsher 2707ef215e64SBen Hutchings kfree(efx->vpd_sn); 2708ef215e64SBen Hutchings 2709874aeea5SJeff Kirsher if (efx->workqueue) { 2710874aeea5SJeff Kirsher destroy_workqueue(efx->workqueue); 2711874aeea5SJeff Kirsher efx->workqueue = NULL; 2712874aeea5SJeff Kirsher } 2713874aeea5SJeff Kirsher } 2714874aeea5SJeff Kirsher 2715874aeea5SJeff Kirsher /************************************************************************** 2716874aeea5SJeff Kirsher * 2717874aeea5SJeff Kirsher * PCI interface 2718874aeea5SJeff Kirsher * 2719874aeea5SJeff Kirsher **************************************************************************/ 2720874aeea5SJeff Kirsher 2721874aeea5SJeff Kirsher /* Main body of final NIC shutdown code 2722874aeea5SJeff Kirsher * This is called only at module unload (or hotplug removal). 2723874aeea5SJeff Kirsher */ 2724874aeea5SJeff Kirsher static void efx_pci_remove_main(struct efx_nic *efx) 2725874aeea5SJeff Kirsher { 27267153f623SBen Hutchings /* Flush reset_work. It can no longer be scheduled since we 27277153f623SBen Hutchings * are not READY. 27287153f623SBen Hutchings */ 27297153f623SBen Hutchings BUG_ON(efx->state == STATE_READY); 27307153f623SBen Hutchings cancel_work_sync(&efx->reset_work); 27317153f623SBen Hutchings 2732d8291187SBen Hutchings efx_disable_interrupts(efx); 2733874aeea5SJeff Kirsher efx_nic_fini_interrupt(efx); 2734874aeea5SJeff Kirsher efx_fini_port(efx); 2735874aeea5SJeff Kirsher efx->type->fini(efx); 2736874aeea5SJeff Kirsher efx_fini_napi(efx); 2737874aeea5SJeff Kirsher efx_remove_all(efx); 2738874aeea5SJeff Kirsher } 2739874aeea5SJeff Kirsher 2740874aeea5SJeff Kirsher /* Final NIC shutdown 2741874aeea5SJeff Kirsher * This is called only at module unload (or hotplug removal). 2742874aeea5SJeff Kirsher */ 2743874aeea5SJeff Kirsher static void efx_pci_remove(struct pci_dev *pci_dev) 2744874aeea5SJeff Kirsher { 2745874aeea5SJeff Kirsher struct efx_nic *efx; 2746874aeea5SJeff Kirsher 2747874aeea5SJeff Kirsher efx = pci_get_drvdata(pci_dev); 2748874aeea5SJeff Kirsher if (!efx) 2749874aeea5SJeff Kirsher return; 2750874aeea5SJeff Kirsher 2751874aeea5SJeff Kirsher /* Mark the NIC as fini, then stop the interface */ 2752874aeea5SJeff Kirsher rtnl_lock(); 27530bcf4a64SBen Hutchings efx_dissociate(efx); 2754874aeea5SJeff Kirsher dev_close(efx->net_dev); 2755d8291187SBen Hutchings efx_disable_interrupts(efx); 2756874aeea5SJeff Kirsher rtnl_unlock(); 2757874aeea5SJeff Kirsher 2758cd2d5b52SBen Hutchings efx_sriov_fini(efx); 2759874aeea5SJeff Kirsher efx_unregister_netdev(efx); 2760874aeea5SJeff Kirsher 2761874aeea5SJeff Kirsher efx_mtd_remove(efx); 2762874aeea5SJeff Kirsher 2763874aeea5SJeff Kirsher efx_pci_remove_main(efx); 2764874aeea5SJeff Kirsher 2765874aeea5SJeff Kirsher efx_fini_io(efx); 2766874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "shutdown successful\n"); 2767874aeea5SJeff Kirsher 2768874aeea5SJeff Kirsher efx_fini_struct(efx); 27693de4e301SBen Hutchings pci_set_drvdata(pci_dev, NULL); 2770874aeea5SJeff Kirsher free_netdev(efx->net_dev); 2771626950dbSAlexandre Rames 2772626950dbSAlexandre Rames pci_disable_pcie_error_reporting(pci_dev); 2773874aeea5SJeff Kirsher }; 2774874aeea5SJeff Kirsher 2775460eeaa0SBen Hutchings /* NIC VPD information 2776460eeaa0SBen Hutchings * Called during probe to display the part number of the 2777460eeaa0SBen Hutchings * installed NIC. VPD is potentially very large but this should 2778460eeaa0SBen Hutchings * always appear within the first 512 bytes. 2779460eeaa0SBen Hutchings */ 2780460eeaa0SBen Hutchings #define SFC_VPD_LEN 512 2781ef215e64SBen Hutchings static void efx_probe_vpd_strings(struct efx_nic *efx) 2782460eeaa0SBen Hutchings { 2783460eeaa0SBen Hutchings struct pci_dev *dev = efx->pci_dev; 2784460eeaa0SBen Hutchings char vpd_data[SFC_VPD_LEN]; 2785460eeaa0SBen Hutchings ssize_t vpd_size; 2786ef215e64SBen Hutchings int ro_start, ro_size, i, j; 2787460eeaa0SBen Hutchings 2788460eeaa0SBen Hutchings /* Get the vpd data from the device */ 2789460eeaa0SBen Hutchings vpd_size = pci_read_vpd(dev, 0, sizeof(vpd_data), vpd_data); 2790460eeaa0SBen Hutchings if (vpd_size <= 0) { 2791460eeaa0SBen Hutchings netif_err(efx, drv, efx->net_dev, "Unable to read VPD\n"); 2792460eeaa0SBen Hutchings return; 2793460eeaa0SBen Hutchings } 2794460eeaa0SBen Hutchings 2795460eeaa0SBen Hutchings /* Get the Read only section */ 2796ef215e64SBen Hutchings ro_start = pci_vpd_find_tag(vpd_data, 0, vpd_size, PCI_VPD_LRDT_RO_DATA); 2797ef215e64SBen Hutchings if (ro_start < 0) { 2798460eeaa0SBen Hutchings netif_err(efx, drv, efx->net_dev, "VPD Read-only not found\n"); 2799460eeaa0SBen Hutchings return; 2800460eeaa0SBen Hutchings } 2801460eeaa0SBen Hutchings 2802ef215e64SBen Hutchings ro_size = pci_vpd_lrdt_size(&vpd_data[ro_start]); 2803ef215e64SBen Hutchings j = ro_size; 2804ef215e64SBen Hutchings i = ro_start + PCI_VPD_LRDT_TAG_SIZE; 2805460eeaa0SBen Hutchings if (i + j > vpd_size) 2806460eeaa0SBen Hutchings j = vpd_size - i; 2807460eeaa0SBen Hutchings 2808460eeaa0SBen Hutchings /* Get the Part number */ 2809460eeaa0SBen Hutchings i = pci_vpd_find_info_keyword(vpd_data, i, j, "PN"); 2810460eeaa0SBen Hutchings if (i < 0) { 2811460eeaa0SBen Hutchings netif_err(efx, drv, efx->net_dev, "Part number not found\n"); 2812460eeaa0SBen Hutchings return; 2813460eeaa0SBen Hutchings } 2814460eeaa0SBen Hutchings 2815460eeaa0SBen Hutchings j = pci_vpd_info_field_size(&vpd_data[i]); 2816460eeaa0SBen Hutchings i += PCI_VPD_INFO_FLD_HDR_SIZE; 2817460eeaa0SBen Hutchings if (i + j > vpd_size) { 2818460eeaa0SBen Hutchings netif_err(efx, drv, efx->net_dev, "Incomplete part number\n"); 2819460eeaa0SBen Hutchings return; 2820460eeaa0SBen Hutchings } 2821460eeaa0SBen Hutchings 2822460eeaa0SBen Hutchings netif_info(efx, drv, efx->net_dev, 2823460eeaa0SBen Hutchings "Part Number : %.*s\n", j, &vpd_data[i]); 2824ef215e64SBen Hutchings 2825ef215e64SBen Hutchings i = ro_start + PCI_VPD_LRDT_TAG_SIZE; 2826ef215e64SBen Hutchings j = ro_size; 2827ef215e64SBen Hutchings i = pci_vpd_find_info_keyword(vpd_data, i, j, "SN"); 2828ef215e64SBen Hutchings if (i < 0) { 2829ef215e64SBen Hutchings netif_err(efx, drv, efx->net_dev, "Serial number not found\n"); 2830ef215e64SBen Hutchings return; 2831ef215e64SBen Hutchings } 2832ef215e64SBen Hutchings 2833ef215e64SBen Hutchings j = pci_vpd_info_field_size(&vpd_data[i]); 2834ef215e64SBen Hutchings i += PCI_VPD_INFO_FLD_HDR_SIZE; 2835ef215e64SBen Hutchings if (i + j > vpd_size) { 2836ef215e64SBen Hutchings netif_err(efx, drv, efx->net_dev, "Incomplete serial number\n"); 2837ef215e64SBen Hutchings return; 2838ef215e64SBen Hutchings } 2839ef215e64SBen Hutchings 2840ef215e64SBen Hutchings efx->vpd_sn = kmalloc(j + 1, GFP_KERNEL); 2841ef215e64SBen Hutchings if (!efx->vpd_sn) 2842ef215e64SBen Hutchings return; 2843ef215e64SBen Hutchings 2844ef215e64SBen Hutchings snprintf(efx->vpd_sn, j + 1, "%s", &vpd_data[i]); 2845460eeaa0SBen Hutchings } 2846460eeaa0SBen Hutchings 2847460eeaa0SBen Hutchings 2848874aeea5SJeff Kirsher /* Main body of NIC initialisation 2849874aeea5SJeff Kirsher * This is called at module load (or hotplug insertion, theoretically). 2850874aeea5SJeff Kirsher */ 2851874aeea5SJeff Kirsher static int efx_pci_probe_main(struct efx_nic *efx) 2852874aeea5SJeff Kirsher { 2853874aeea5SJeff Kirsher int rc; 2854874aeea5SJeff Kirsher 2855874aeea5SJeff Kirsher /* Do start-of-day initialisation */ 2856874aeea5SJeff Kirsher rc = efx_probe_all(efx); 2857874aeea5SJeff Kirsher if (rc) 2858874aeea5SJeff Kirsher goto fail1; 2859874aeea5SJeff Kirsher 2860874aeea5SJeff Kirsher efx_init_napi(efx); 2861874aeea5SJeff Kirsher 2862874aeea5SJeff Kirsher rc = efx->type->init(efx); 2863874aeea5SJeff Kirsher if (rc) { 2864874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 2865874aeea5SJeff Kirsher "failed to initialise NIC\n"); 2866874aeea5SJeff Kirsher goto fail3; 2867874aeea5SJeff Kirsher } 2868874aeea5SJeff Kirsher 2869874aeea5SJeff Kirsher rc = efx_init_port(efx); 2870874aeea5SJeff Kirsher if (rc) { 2871874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 2872874aeea5SJeff Kirsher "failed to initialise port\n"); 2873874aeea5SJeff Kirsher goto fail4; 2874874aeea5SJeff Kirsher } 2875874aeea5SJeff Kirsher 2876874aeea5SJeff Kirsher rc = efx_nic_init_interrupt(efx); 2877874aeea5SJeff Kirsher if (rc) 2878874aeea5SJeff Kirsher goto fail5; 2879261e4d96SJon Cooper rc = efx_enable_interrupts(efx); 2880261e4d96SJon Cooper if (rc) 2881261e4d96SJon Cooper goto fail6; 2882874aeea5SJeff Kirsher 2883874aeea5SJeff Kirsher return 0; 2884874aeea5SJeff Kirsher 2885261e4d96SJon Cooper fail6: 2886261e4d96SJon Cooper efx_nic_fini_interrupt(efx); 2887874aeea5SJeff Kirsher fail5: 2888874aeea5SJeff Kirsher efx_fini_port(efx); 2889874aeea5SJeff Kirsher fail4: 2890874aeea5SJeff Kirsher efx->type->fini(efx); 2891874aeea5SJeff Kirsher fail3: 2892874aeea5SJeff Kirsher efx_fini_napi(efx); 2893874aeea5SJeff Kirsher efx_remove_all(efx); 2894874aeea5SJeff Kirsher fail1: 2895874aeea5SJeff Kirsher return rc; 2896874aeea5SJeff Kirsher } 2897874aeea5SJeff Kirsher 2898874aeea5SJeff Kirsher /* NIC initialisation 2899874aeea5SJeff Kirsher * 2900874aeea5SJeff Kirsher * This is called at module load (or hotplug insertion, 290173ba7b68SBen Hutchings * theoretically). It sets up PCI mappings, resets the NIC, 2902874aeea5SJeff Kirsher * sets up and registers the network devices with the kernel and hooks 2903874aeea5SJeff Kirsher * the interrupt service routine. It does not prepare the device for 2904874aeea5SJeff Kirsher * transmission; this is left to the first time one of the network 2905874aeea5SJeff Kirsher * interfaces is brought up (i.e. efx_net_open). 2906874aeea5SJeff Kirsher */ 290787d1fc11SBill Pemberton static int efx_pci_probe(struct pci_dev *pci_dev, 2908874aeea5SJeff Kirsher const struct pci_device_id *entry) 2909874aeea5SJeff Kirsher { 2910874aeea5SJeff Kirsher struct net_device *net_dev; 2911874aeea5SJeff Kirsher struct efx_nic *efx; 2912fadac6aaSBen Hutchings int rc; 2913874aeea5SJeff Kirsher 2914874aeea5SJeff Kirsher /* Allocate and initialise a struct net_device and struct efx_nic */ 2915874aeea5SJeff Kirsher net_dev = alloc_etherdev_mqs(sizeof(*efx), EFX_MAX_CORE_TX_QUEUES, 2916874aeea5SJeff Kirsher EFX_MAX_RX_QUEUES); 2917874aeea5SJeff Kirsher if (!net_dev) 2918874aeea5SJeff Kirsher return -ENOMEM; 2919adeb15aaSBen Hutchings efx = netdev_priv(net_dev); 2920adeb15aaSBen Hutchings efx->type = (const struct efx_nic_type *) entry->driver_data; 2921adeb15aaSBen Hutchings net_dev->features |= (efx->type->offload_features | NETIF_F_SG | 2922874aeea5SJeff Kirsher NETIF_F_HIGHDMA | NETIF_F_TSO | 2923874aeea5SJeff Kirsher NETIF_F_RXCSUM); 2924adeb15aaSBen Hutchings if (efx->type->offload_features & NETIF_F_V6_CSUM) 2925874aeea5SJeff Kirsher net_dev->features |= NETIF_F_TSO6; 2926874aeea5SJeff Kirsher /* Mask for features that also apply to VLAN devices */ 2927874aeea5SJeff Kirsher net_dev->vlan_features |= (NETIF_F_ALL_CSUM | NETIF_F_SG | 2928874aeea5SJeff Kirsher NETIF_F_HIGHDMA | NETIF_F_ALL_TSO | 2929874aeea5SJeff Kirsher NETIF_F_RXCSUM); 2930874aeea5SJeff Kirsher /* All offloads can be toggled */ 2931874aeea5SJeff Kirsher net_dev->hw_features = net_dev->features & ~NETIF_F_HIGHDMA; 2932874aeea5SJeff Kirsher pci_set_drvdata(pci_dev, efx); 2933874aeea5SJeff Kirsher SET_NETDEV_DEV(net_dev, &pci_dev->dev); 2934adeb15aaSBen Hutchings rc = efx_init_struct(efx, pci_dev, net_dev); 2935874aeea5SJeff Kirsher if (rc) 2936874aeea5SJeff Kirsher goto fail1; 2937874aeea5SJeff Kirsher 2938874aeea5SJeff Kirsher netif_info(efx, probe, efx->net_dev, 2939874aeea5SJeff Kirsher "Solarflare NIC detected\n"); 2940874aeea5SJeff Kirsher 2941ef215e64SBen Hutchings efx_probe_vpd_strings(efx); 2942460eeaa0SBen Hutchings 2943874aeea5SJeff Kirsher /* Set up basic I/O (BAR mappings etc) */ 2944874aeea5SJeff Kirsher rc = efx_init_io(efx); 2945874aeea5SJeff Kirsher if (rc) 2946874aeea5SJeff Kirsher goto fail2; 2947874aeea5SJeff Kirsher 2948874aeea5SJeff Kirsher rc = efx_pci_probe_main(efx); 2949fadac6aaSBen Hutchings if (rc) 2950874aeea5SJeff Kirsher goto fail3; 2951874aeea5SJeff Kirsher 2952874aeea5SJeff Kirsher rc = efx_register_netdev(efx); 2953874aeea5SJeff Kirsher if (rc) 2954fadac6aaSBen Hutchings goto fail4; 2955874aeea5SJeff Kirsher 2956cd2d5b52SBen Hutchings rc = efx_sriov_init(efx); 2957cd2d5b52SBen Hutchings if (rc) 2958cd2d5b52SBen Hutchings netif_err(efx, probe, efx->net_dev, 2959cd2d5b52SBen Hutchings "SR-IOV can't be enabled rc %d\n", rc); 2960cd2d5b52SBen Hutchings 2961874aeea5SJeff Kirsher netif_dbg(efx, probe, efx->net_dev, "initialisation successful\n"); 2962874aeea5SJeff Kirsher 29637c43161cSBen Hutchings /* Try to create MTDs, but allow this to fail */ 2964874aeea5SJeff Kirsher rtnl_lock(); 29657c43161cSBen Hutchings rc = efx_mtd_probe(efx); 2966874aeea5SJeff Kirsher rtnl_unlock(); 29677c43161cSBen Hutchings if (rc) 29687c43161cSBen Hutchings netif_warn(efx, probe, efx->net_dev, 29697c43161cSBen Hutchings "failed to create MTDs (%d)\n", rc); 29707c43161cSBen Hutchings 2971626950dbSAlexandre Rames rc = pci_enable_pcie_error_reporting(pci_dev); 2972626950dbSAlexandre Rames if (rc && rc != -EINVAL) 2973626950dbSAlexandre Rames netif_warn(efx, probe, efx->net_dev, 2974626950dbSAlexandre Rames "pci_enable_pcie_error_reporting failed (%d)\n", rc); 2975626950dbSAlexandre Rames 2976874aeea5SJeff Kirsher return 0; 2977874aeea5SJeff Kirsher 2978874aeea5SJeff Kirsher fail4: 2979fadac6aaSBen Hutchings efx_pci_remove_main(efx); 2980874aeea5SJeff Kirsher fail3: 2981874aeea5SJeff Kirsher efx_fini_io(efx); 2982874aeea5SJeff Kirsher fail2: 2983874aeea5SJeff Kirsher efx_fini_struct(efx); 2984874aeea5SJeff Kirsher fail1: 29853de4e301SBen Hutchings pci_set_drvdata(pci_dev, NULL); 2986874aeea5SJeff Kirsher WARN_ON(rc > 0); 2987874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "initialisation failed. rc=%d\n", rc); 2988874aeea5SJeff Kirsher free_netdev(net_dev); 2989874aeea5SJeff Kirsher return rc; 2990874aeea5SJeff Kirsher } 2991874aeea5SJeff Kirsher 2992874aeea5SJeff Kirsher static int efx_pm_freeze(struct device *dev) 2993874aeea5SJeff Kirsher { 2994874aeea5SJeff Kirsher struct efx_nic *efx = pci_get_drvdata(to_pci_dev(dev)); 2995874aeea5SJeff Kirsher 299661da026dSBen Hutchings rtnl_lock(); 299761da026dSBen Hutchings 29986032fb56SBen Hutchings if (efx->state != STATE_DISABLED) { 2999f16aeea0SBen Hutchings efx->state = STATE_UNINIT; 3000874aeea5SJeff Kirsher 3001c2f3b8e3SDaniel Pieczko efx_device_detach_sync(efx); 3002874aeea5SJeff Kirsher 3003874aeea5SJeff Kirsher efx_stop_all(efx); 3004d8291187SBen Hutchings efx_disable_interrupts(efx); 30056032fb56SBen Hutchings } 3006874aeea5SJeff Kirsher 300761da026dSBen Hutchings rtnl_unlock(); 300861da026dSBen Hutchings 3009874aeea5SJeff Kirsher return 0; 3010874aeea5SJeff Kirsher } 3011874aeea5SJeff Kirsher 3012874aeea5SJeff Kirsher static int efx_pm_thaw(struct device *dev) 3013874aeea5SJeff Kirsher { 3014261e4d96SJon Cooper int rc; 3015874aeea5SJeff Kirsher struct efx_nic *efx = pci_get_drvdata(to_pci_dev(dev)); 3016874aeea5SJeff Kirsher 301761da026dSBen Hutchings rtnl_lock(); 301861da026dSBen Hutchings 30196032fb56SBen Hutchings if (efx->state != STATE_DISABLED) { 3020261e4d96SJon Cooper rc = efx_enable_interrupts(efx); 3021261e4d96SJon Cooper if (rc) 3022261e4d96SJon Cooper goto fail; 3023874aeea5SJeff Kirsher 3024874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 3025874aeea5SJeff Kirsher efx->phy_op->reconfigure(efx); 3026874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 3027874aeea5SJeff Kirsher 3028874aeea5SJeff Kirsher efx_start_all(efx); 3029874aeea5SJeff Kirsher 3030874aeea5SJeff Kirsher netif_device_attach(efx->net_dev); 3031874aeea5SJeff Kirsher 3032f16aeea0SBen Hutchings efx->state = STATE_READY; 3033874aeea5SJeff Kirsher 3034874aeea5SJeff Kirsher efx->type->resume_wol(efx); 30356032fb56SBen Hutchings } 3036874aeea5SJeff Kirsher 303761da026dSBen Hutchings rtnl_unlock(); 303861da026dSBen Hutchings 3039874aeea5SJeff Kirsher /* Reschedule any quenched resets scheduled during efx_pm_freeze() */ 3040874aeea5SJeff Kirsher queue_work(reset_workqueue, &efx->reset_work); 3041874aeea5SJeff Kirsher 3042874aeea5SJeff Kirsher return 0; 3043261e4d96SJon Cooper 3044261e4d96SJon Cooper fail: 3045261e4d96SJon Cooper rtnl_unlock(); 3046261e4d96SJon Cooper 3047261e4d96SJon Cooper return rc; 3048874aeea5SJeff Kirsher } 3049874aeea5SJeff Kirsher 3050874aeea5SJeff Kirsher static int efx_pm_poweroff(struct device *dev) 3051874aeea5SJeff Kirsher { 3052874aeea5SJeff Kirsher struct pci_dev *pci_dev = to_pci_dev(dev); 3053874aeea5SJeff Kirsher struct efx_nic *efx = pci_get_drvdata(pci_dev); 3054874aeea5SJeff Kirsher 3055874aeea5SJeff Kirsher efx->type->fini(efx); 3056874aeea5SJeff Kirsher 3057874aeea5SJeff Kirsher efx->reset_pending = 0; 3058874aeea5SJeff Kirsher 3059874aeea5SJeff Kirsher pci_save_state(pci_dev); 3060874aeea5SJeff Kirsher return pci_set_power_state(pci_dev, PCI_D3hot); 3061874aeea5SJeff Kirsher } 3062874aeea5SJeff Kirsher 3063874aeea5SJeff Kirsher /* Used for both resume and restore */ 3064874aeea5SJeff Kirsher static int efx_pm_resume(struct device *dev) 3065874aeea5SJeff Kirsher { 3066874aeea5SJeff Kirsher struct pci_dev *pci_dev = to_pci_dev(dev); 3067874aeea5SJeff Kirsher struct efx_nic *efx = pci_get_drvdata(pci_dev); 3068874aeea5SJeff Kirsher int rc; 3069874aeea5SJeff Kirsher 3070874aeea5SJeff Kirsher rc = pci_set_power_state(pci_dev, PCI_D0); 3071874aeea5SJeff Kirsher if (rc) 3072874aeea5SJeff Kirsher return rc; 3073874aeea5SJeff Kirsher pci_restore_state(pci_dev); 3074874aeea5SJeff Kirsher rc = pci_enable_device(pci_dev); 3075874aeea5SJeff Kirsher if (rc) 3076874aeea5SJeff Kirsher return rc; 3077874aeea5SJeff Kirsher pci_set_master(efx->pci_dev); 3078874aeea5SJeff Kirsher rc = efx->type->reset(efx, RESET_TYPE_ALL); 3079874aeea5SJeff Kirsher if (rc) 3080874aeea5SJeff Kirsher return rc; 3081874aeea5SJeff Kirsher rc = efx->type->init(efx); 3082874aeea5SJeff Kirsher if (rc) 3083874aeea5SJeff Kirsher return rc; 3084261e4d96SJon Cooper rc = efx_pm_thaw(dev); 3085261e4d96SJon Cooper return rc; 3086874aeea5SJeff Kirsher } 3087874aeea5SJeff Kirsher 3088874aeea5SJeff Kirsher static int efx_pm_suspend(struct device *dev) 3089874aeea5SJeff Kirsher { 3090874aeea5SJeff Kirsher int rc; 3091874aeea5SJeff Kirsher 3092874aeea5SJeff Kirsher efx_pm_freeze(dev); 3093874aeea5SJeff Kirsher rc = efx_pm_poweroff(dev); 3094874aeea5SJeff Kirsher if (rc) 3095874aeea5SJeff Kirsher efx_pm_resume(dev); 3096874aeea5SJeff Kirsher return rc; 3097874aeea5SJeff Kirsher } 3098874aeea5SJeff Kirsher 309918e83e4cSBen Hutchings static const struct dev_pm_ops efx_pm_ops = { 3100874aeea5SJeff Kirsher .suspend = efx_pm_suspend, 3101874aeea5SJeff Kirsher .resume = efx_pm_resume, 3102874aeea5SJeff Kirsher .freeze = efx_pm_freeze, 3103874aeea5SJeff Kirsher .thaw = efx_pm_thaw, 3104874aeea5SJeff Kirsher .poweroff = efx_pm_poweroff, 3105874aeea5SJeff Kirsher .restore = efx_pm_resume, 3106874aeea5SJeff Kirsher }; 3107874aeea5SJeff Kirsher 3108626950dbSAlexandre Rames /* A PCI error affecting this device was detected. 3109626950dbSAlexandre Rames * At this point MMIO and DMA may be disabled. 3110626950dbSAlexandre Rames * Stop the software path and request a slot reset. 3111626950dbSAlexandre Rames */ 3112debd0034Sstephen hemminger static pci_ers_result_t efx_io_error_detected(struct pci_dev *pdev, 3113626950dbSAlexandre Rames enum pci_channel_state state) 3114626950dbSAlexandre Rames { 3115626950dbSAlexandre Rames pci_ers_result_t status = PCI_ERS_RESULT_RECOVERED; 3116626950dbSAlexandre Rames struct efx_nic *efx = pci_get_drvdata(pdev); 3117626950dbSAlexandre Rames 3118626950dbSAlexandre Rames if (state == pci_channel_io_perm_failure) 3119626950dbSAlexandre Rames return PCI_ERS_RESULT_DISCONNECT; 3120626950dbSAlexandre Rames 3121626950dbSAlexandre Rames rtnl_lock(); 3122626950dbSAlexandre Rames 3123626950dbSAlexandre Rames if (efx->state != STATE_DISABLED) { 3124626950dbSAlexandre Rames efx->state = STATE_RECOVERY; 3125626950dbSAlexandre Rames efx->reset_pending = 0; 3126626950dbSAlexandre Rames 3127626950dbSAlexandre Rames efx_device_detach_sync(efx); 3128626950dbSAlexandre Rames 3129626950dbSAlexandre Rames efx_stop_all(efx); 3130d8291187SBen Hutchings efx_disable_interrupts(efx); 3131626950dbSAlexandre Rames 3132626950dbSAlexandre Rames status = PCI_ERS_RESULT_NEED_RESET; 3133626950dbSAlexandre Rames } else { 3134626950dbSAlexandre Rames /* If the interface is disabled we don't want to do anything 3135626950dbSAlexandre Rames * with it. 3136626950dbSAlexandre Rames */ 3137626950dbSAlexandre Rames status = PCI_ERS_RESULT_RECOVERED; 3138626950dbSAlexandre Rames } 3139626950dbSAlexandre Rames 3140626950dbSAlexandre Rames rtnl_unlock(); 3141626950dbSAlexandre Rames 3142626950dbSAlexandre Rames pci_disable_device(pdev); 3143626950dbSAlexandre Rames 3144626950dbSAlexandre Rames return status; 3145626950dbSAlexandre Rames } 3146626950dbSAlexandre Rames 3147626950dbSAlexandre Rames /* Fake a successfull reset, which will be performed later in efx_io_resume. */ 3148debd0034Sstephen hemminger static pci_ers_result_t efx_io_slot_reset(struct pci_dev *pdev) 3149626950dbSAlexandre Rames { 3150626950dbSAlexandre Rames struct efx_nic *efx = pci_get_drvdata(pdev); 3151626950dbSAlexandre Rames pci_ers_result_t status = PCI_ERS_RESULT_RECOVERED; 3152626950dbSAlexandre Rames int rc; 3153626950dbSAlexandre Rames 3154626950dbSAlexandre Rames if (pci_enable_device(pdev)) { 3155626950dbSAlexandre Rames netif_err(efx, hw, efx->net_dev, 3156626950dbSAlexandre Rames "Cannot re-enable PCI device after reset.\n"); 3157626950dbSAlexandre Rames status = PCI_ERS_RESULT_DISCONNECT; 3158626950dbSAlexandre Rames } 3159626950dbSAlexandre Rames 3160626950dbSAlexandre Rames rc = pci_cleanup_aer_uncorrect_error_status(pdev); 3161626950dbSAlexandre Rames if (rc) { 3162626950dbSAlexandre Rames netif_err(efx, hw, efx->net_dev, 3163626950dbSAlexandre Rames "pci_cleanup_aer_uncorrect_error_status failed (%d)\n", rc); 3164626950dbSAlexandre Rames /* Non-fatal error. Continue. */ 3165626950dbSAlexandre Rames } 3166626950dbSAlexandre Rames 3167626950dbSAlexandre Rames return status; 3168626950dbSAlexandre Rames } 3169626950dbSAlexandre Rames 3170626950dbSAlexandre Rames /* Perform the actual reset and resume I/O operations. */ 3171626950dbSAlexandre Rames static void efx_io_resume(struct pci_dev *pdev) 3172626950dbSAlexandre Rames { 3173626950dbSAlexandre Rames struct efx_nic *efx = pci_get_drvdata(pdev); 3174626950dbSAlexandre Rames int rc; 3175626950dbSAlexandre Rames 3176626950dbSAlexandre Rames rtnl_lock(); 3177626950dbSAlexandre Rames 3178626950dbSAlexandre Rames if (efx->state == STATE_DISABLED) 3179626950dbSAlexandre Rames goto out; 3180626950dbSAlexandre Rames 3181626950dbSAlexandre Rames rc = efx_reset(efx, RESET_TYPE_ALL); 3182626950dbSAlexandre Rames if (rc) { 3183626950dbSAlexandre Rames netif_err(efx, hw, efx->net_dev, 3184626950dbSAlexandre Rames "efx_reset failed after PCI error (%d)\n", rc); 3185626950dbSAlexandre Rames } else { 3186626950dbSAlexandre Rames efx->state = STATE_READY; 3187626950dbSAlexandre Rames netif_dbg(efx, hw, efx->net_dev, 3188626950dbSAlexandre Rames "Done resetting and resuming IO after PCI error.\n"); 3189626950dbSAlexandre Rames } 3190626950dbSAlexandre Rames 3191626950dbSAlexandre Rames out: 3192626950dbSAlexandre Rames rtnl_unlock(); 3193626950dbSAlexandre Rames } 3194626950dbSAlexandre Rames 3195626950dbSAlexandre Rames /* For simplicity and reliability, we always require a slot reset and try to 3196626950dbSAlexandre Rames * reset the hardware when a pci error affecting the device is detected. 3197626950dbSAlexandre Rames * We leave both the link_reset and mmio_enabled callback unimplemented: 3198626950dbSAlexandre Rames * with our request for slot reset the mmio_enabled callback will never be 3199626950dbSAlexandre Rames * called, and the link_reset callback is not used by AER or EEH mechanisms. 3200626950dbSAlexandre Rames */ 3201626950dbSAlexandre Rames static struct pci_error_handlers efx_err_handlers = { 3202626950dbSAlexandre Rames .error_detected = efx_io_error_detected, 3203626950dbSAlexandre Rames .slot_reset = efx_io_slot_reset, 3204626950dbSAlexandre Rames .resume = efx_io_resume, 3205626950dbSAlexandre Rames }; 3206626950dbSAlexandre Rames 3207874aeea5SJeff Kirsher static struct pci_driver efx_pci_driver = { 3208874aeea5SJeff Kirsher .name = KBUILD_MODNAME, 3209874aeea5SJeff Kirsher .id_table = efx_pci_table, 3210874aeea5SJeff Kirsher .probe = efx_pci_probe, 3211874aeea5SJeff Kirsher .remove = efx_pci_remove, 3212874aeea5SJeff Kirsher .driver.pm = &efx_pm_ops, 3213626950dbSAlexandre Rames .err_handler = &efx_err_handlers, 3214874aeea5SJeff Kirsher }; 3215874aeea5SJeff Kirsher 3216874aeea5SJeff Kirsher /************************************************************************** 3217874aeea5SJeff Kirsher * 3218874aeea5SJeff Kirsher * Kernel module interface 3219874aeea5SJeff Kirsher * 3220874aeea5SJeff Kirsher *************************************************************************/ 3221874aeea5SJeff Kirsher 3222874aeea5SJeff Kirsher module_param(interrupt_mode, uint, 0444); 3223874aeea5SJeff Kirsher MODULE_PARM_DESC(interrupt_mode, 3224874aeea5SJeff Kirsher "Interrupt mode (0=>MSIX 1=>MSI 2=>legacy)"); 3225874aeea5SJeff Kirsher 3226874aeea5SJeff Kirsher static int __init efx_init_module(void) 3227874aeea5SJeff Kirsher { 3228874aeea5SJeff Kirsher int rc; 3229874aeea5SJeff Kirsher 3230874aeea5SJeff Kirsher printk(KERN_INFO "Solarflare NET driver v" EFX_DRIVER_VERSION "\n"); 3231874aeea5SJeff Kirsher 3232874aeea5SJeff Kirsher rc = register_netdevice_notifier(&efx_netdev_notifier); 3233874aeea5SJeff Kirsher if (rc) 3234874aeea5SJeff Kirsher goto err_notifier; 3235874aeea5SJeff Kirsher 3236cd2d5b52SBen Hutchings rc = efx_init_sriov(); 3237cd2d5b52SBen Hutchings if (rc) 3238cd2d5b52SBen Hutchings goto err_sriov; 3239cd2d5b52SBen Hutchings 3240874aeea5SJeff Kirsher reset_workqueue = create_singlethread_workqueue("sfc_reset"); 3241874aeea5SJeff Kirsher if (!reset_workqueue) { 3242874aeea5SJeff Kirsher rc = -ENOMEM; 3243874aeea5SJeff Kirsher goto err_reset; 3244874aeea5SJeff Kirsher } 3245874aeea5SJeff Kirsher 3246874aeea5SJeff Kirsher rc = pci_register_driver(&efx_pci_driver); 3247874aeea5SJeff Kirsher if (rc < 0) 3248874aeea5SJeff Kirsher goto err_pci; 3249874aeea5SJeff Kirsher 3250874aeea5SJeff Kirsher return 0; 3251874aeea5SJeff Kirsher 3252874aeea5SJeff Kirsher err_pci: 3253874aeea5SJeff Kirsher destroy_workqueue(reset_workqueue); 3254874aeea5SJeff Kirsher err_reset: 3255cd2d5b52SBen Hutchings efx_fini_sriov(); 3256cd2d5b52SBen Hutchings err_sriov: 3257874aeea5SJeff Kirsher unregister_netdevice_notifier(&efx_netdev_notifier); 3258874aeea5SJeff Kirsher err_notifier: 3259874aeea5SJeff Kirsher return rc; 3260874aeea5SJeff Kirsher } 3261874aeea5SJeff Kirsher 3262874aeea5SJeff Kirsher static void __exit efx_exit_module(void) 3263874aeea5SJeff Kirsher { 3264874aeea5SJeff Kirsher printk(KERN_INFO "Solarflare NET driver unloading\n"); 3265874aeea5SJeff Kirsher 3266874aeea5SJeff Kirsher pci_unregister_driver(&efx_pci_driver); 3267874aeea5SJeff Kirsher destroy_workqueue(reset_workqueue); 3268cd2d5b52SBen Hutchings efx_fini_sriov(); 3269874aeea5SJeff Kirsher unregister_netdevice_notifier(&efx_netdev_notifier); 3270874aeea5SJeff Kirsher 3271874aeea5SJeff Kirsher } 3272874aeea5SJeff Kirsher 3273874aeea5SJeff Kirsher module_init(efx_init_module); 3274874aeea5SJeff Kirsher module_exit(efx_exit_module); 3275874aeea5SJeff Kirsher 3276874aeea5SJeff Kirsher MODULE_AUTHOR("Solarflare Communications and " 3277874aeea5SJeff Kirsher "Michael Brown <mbrown@fensystems.co.uk>"); 3278874aeea5SJeff Kirsher MODULE_DESCRIPTION("Solarflare Communications network driver"); 3279874aeea5SJeff Kirsher MODULE_LICENSE("GPL"); 3280874aeea5SJeff Kirsher MODULE_DEVICE_TABLE(pci, efx_pci_table); 3281