1874aeea5SJeff Kirsher /**************************************************************************** 2874aeea5SJeff Kirsher * Driver for Solarflare Solarstorm network controllers and boards 3874aeea5SJeff Kirsher * Copyright 2005-2006 Fen Systems Ltd. 4874aeea5SJeff Kirsher * Copyright 2005-2011 Solarflare Communications Inc. 5874aeea5SJeff Kirsher * 6874aeea5SJeff Kirsher * This program is free software; you can redistribute it and/or modify it 7874aeea5SJeff Kirsher * under the terms of the GNU General Public License version 2 as published 8874aeea5SJeff Kirsher * by the Free Software Foundation, incorporated herein by reference. 9874aeea5SJeff Kirsher */ 10874aeea5SJeff Kirsher 11874aeea5SJeff Kirsher #include <linux/module.h> 12874aeea5SJeff Kirsher #include <linux/pci.h> 13874aeea5SJeff Kirsher #include <linux/netdevice.h> 14874aeea5SJeff Kirsher #include <linux/etherdevice.h> 15874aeea5SJeff Kirsher #include <linux/delay.h> 16874aeea5SJeff Kirsher #include <linux/notifier.h> 17874aeea5SJeff Kirsher #include <linux/ip.h> 18874aeea5SJeff Kirsher #include <linux/tcp.h> 19874aeea5SJeff Kirsher #include <linux/in.h> 20874aeea5SJeff Kirsher #include <linux/crc32.h> 21874aeea5SJeff Kirsher #include <linux/ethtool.h> 22874aeea5SJeff Kirsher #include <linux/topology.h> 23874aeea5SJeff Kirsher #include <linux/gfp.h> 24874aeea5SJeff Kirsher #include <linux/cpu_rmap.h> 25626950dbSAlexandre Rames #include <linux/aer.h> 26874aeea5SJeff Kirsher #include "net_driver.h" 27874aeea5SJeff Kirsher #include "efx.h" 28874aeea5SJeff Kirsher #include "nic.h" 29dd40781eSBen Hutchings #include "selftest.h" 30874aeea5SJeff Kirsher 31874aeea5SJeff Kirsher #include "mcdi.h" 32874aeea5SJeff Kirsher #include "workarounds.h" 33874aeea5SJeff Kirsher 34874aeea5SJeff Kirsher /************************************************************************** 35874aeea5SJeff Kirsher * 36874aeea5SJeff Kirsher * Type name strings 37874aeea5SJeff Kirsher * 38874aeea5SJeff Kirsher ************************************************************************** 39874aeea5SJeff Kirsher */ 40874aeea5SJeff Kirsher 41874aeea5SJeff Kirsher /* Loopback mode names (see LOOPBACK_MODE()) */ 42874aeea5SJeff Kirsher const unsigned int efx_loopback_mode_max = LOOPBACK_MAX; 4318e83e4cSBen Hutchings const char *const efx_loopback_mode_names[] = { 44874aeea5SJeff Kirsher [LOOPBACK_NONE] = "NONE", 45874aeea5SJeff Kirsher [LOOPBACK_DATA] = "DATAPATH", 46874aeea5SJeff Kirsher [LOOPBACK_GMAC] = "GMAC", 47874aeea5SJeff Kirsher [LOOPBACK_XGMII] = "XGMII", 48874aeea5SJeff Kirsher [LOOPBACK_XGXS] = "XGXS", 49874aeea5SJeff Kirsher [LOOPBACK_XAUI] = "XAUI", 50874aeea5SJeff Kirsher [LOOPBACK_GMII] = "GMII", 51874aeea5SJeff Kirsher [LOOPBACK_SGMII] = "SGMII", 52874aeea5SJeff Kirsher [LOOPBACK_XGBR] = "XGBR", 53874aeea5SJeff Kirsher [LOOPBACK_XFI] = "XFI", 54874aeea5SJeff Kirsher [LOOPBACK_XAUI_FAR] = "XAUI_FAR", 55874aeea5SJeff Kirsher [LOOPBACK_GMII_FAR] = "GMII_FAR", 56874aeea5SJeff Kirsher [LOOPBACK_SGMII_FAR] = "SGMII_FAR", 57874aeea5SJeff Kirsher [LOOPBACK_XFI_FAR] = "XFI_FAR", 58874aeea5SJeff Kirsher [LOOPBACK_GPHY] = "GPHY", 59874aeea5SJeff Kirsher [LOOPBACK_PHYXS] = "PHYXS", 60874aeea5SJeff Kirsher [LOOPBACK_PCS] = "PCS", 61874aeea5SJeff Kirsher [LOOPBACK_PMAPMD] = "PMA/PMD", 62874aeea5SJeff Kirsher [LOOPBACK_XPORT] = "XPORT", 63874aeea5SJeff Kirsher [LOOPBACK_XGMII_WS] = "XGMII_WS", 64874aeea5SJeff Kirsher [LOOPBACK_XAUI_WS] = "XAUI_WS", 65874aeea5SJeff Kirsher [LOOPBACK_XAUI_WS_FAR] = "XAUI_WS_FAR", 66874aeea5SJeff Kirsher [LOOPBACK_XAUI_WS_NEAR] = "XAUI_WS_NEAR", 67874aeea5SJeff Kirsher [LOOPBACK_GMII_WS] = "GMII_WS", 68874aeea5SJeff Kirsher [LOOPBACK_XFI_WS] = "XFI_WS", 69874aeea5SJeff Kirsher [LOOPBACK_XFI_WS_FAR] = "XFI_WS_FAR", 70874aeea5SJeff Kirsher [LOOPBACK_PHYXS_WS] = "PHYXS_WS", 71874aeea5SJeff Kirsher }; 72874aeea5SJeff Kirsher 73874aeea5SJeff Kirsher const unsigned int efx_reset_type_max = RESET_TYPE_MAX; 7418e83e4cSBen Hutchings const char *const efx_reset_type_names[] = { 75874aeea5SJeff Kirsher [RESET_TYPE_INVISIBLE] = "INVISIBLE", 76874aeea5SJeff Kirsher [RESET_TYPE_ALL] = "ALL", 77626950dbSAlexandre Rames [RESET_TYPE_RECOVER_OR_ALL] = "RECOVER_OR_ALL", 78874aeea5SJeff Kirsher [RESET_TYPE_WORLD] = "WORLD", 79626950dbSAlexandre Rames [RESET_TYPE_RECOVER_OR_DISABLE] = "RECOVER_OR_DISABLE", 80874aeea5SJeff Kirsher [RESET_TYPE_DISABLE] = "DISABLE", 81874aeea5SJeff Kirsher [RESET_TYPE_TX_WATCHDOG] = "TX_WATCHDOG", 82874aeea5SJeff Kirsher [RESET_TYPE_INT_ERROR] = "INT_ERROR", 83874aeea5SJeff Kirsher [RESET_TYPE_RX_RECOVERY] = "RX_RECOVERY", 84874aeea5SJeff Kirsher [RESET_TYPE_RX_DESC_FETCH] = "RX_DESC_FETCH", 85874aeea5SJeff Kirsher [RESET_TYPE_TX_DESC_FETCH] = "TX_DESC_FETCH", 86874aeea5SJeff Kirsher [RESET_TYPE_TX_SKIP] = "TX_SKIP", 87874aeea5SJeff Kirsher [RESET_TYPE_MC_FAILURE] = "MC_FAILURE", 88874aeea5SJeff Kirsher }; 89874aeea5SJeff Kirsher 90874aeea5SJeff Kirsher /* Reset workqueue. If any NIC has a hardware failure then a reset will be 91874aeea5SJeff Kirsher * queued onto this work queue. This is not a per-nic work queue, because 92874aeea5SJeff Kirsher * efx_reset_work() acquires the rtnl lock, so resets are naturally serialised. 93874aeea5SJeff Kirsher */ 94874aeea5SJeff Kirsher static struct workqueue_struct *reset_workqueue; 95874aeea5SJeff Kirsher 96874aeea5SJeff Kirsher /************************************************************************** 97874aeea5SJeff Kirsher * 98874aeea5SJeff Kirsher * Configurable values 99874aeea5SJeff Kirsher * 100874aeea5SJeff Kirsher *************************************************************************/ 101874aeea5SJeff Kirsher 102874aeea5SJeff Kirsher /* 103874aeea5SJeff Kirsher * Use separate channels for TX and RX events 104874aeea5SJeff Kirsher * 105874aeea5SJeff Kirsher * Set this to 1 to use separate channels for TX and RX. It allows us 106874aeea5SJeff Kirsher * to control interrupt affinity separately for TX and RX. 107874aeea5SJeff Kirsher * 108874aeea5SJeff Kirsher * This is only used in MSI-X interrupt mode 109874aeea5SJeff Kirsher */ 110b9cc977dSBen Hutchings static bool separate_tx_channels; 111b9cc977dSBen Hutchings module_param(separate_tx_channels, bool, 0444); 112874aeea5SJeff Kirsher MODULE_PARM_DESC(separate_tx_channels, 113874aeea5SJeff Kirsher "Use separate channels for TX and RX"); 114874aeea5SJeff Kirsher 115874aeea5SJeff Kirsher /* This is the weight assigned to each of the (per-channel) virtual 116874aeea5SJeff Kirsher * NAPI devices. 117874aeea5SJeff Kirsher */ 118874aeea5SJeff Kirsher static int napi_weight = 64; 119874aeea5SJeff Kirsher 120874aeea5SJeff Kirsher /* This is the time (in jiffies) between invocations of the hardware 121626950dbSAlexandre Rames * monitor. 122626950dbSAlexandre Rames * On Falcon-based NICs, this will: 123874aeea5SJeff Kirsher * - Check the on-board hardware monitor; 124874aeea5SJeff Kirsher * - Poll the link state and reconfigure the hardware as necessary. 125626950dbSAlexandre Rames * On Siena-based NICs for power systems with EEH support, this will give EEH a 126626950dbSAlexandre Rames * chance to start. 127874aeea5SJeff Kirsher */ 128874aeea5SJeff Kirsher static unsigned int efx_monitor_interval = 1 * HZ; 129874aeea5SJeff Kirsher 130874aeea5SJeff Kirsher /* Initial interrupt moderation settings. They can be modified after 131874aeea5SJeff Kirsher * module load with ethtool. 132874aeea5SJeff Kirsher * 133874aeea5SJeff Kirsher * The default for RX should strike a balance between increasing the 134874aeea5SJeff Kirsher * round-trip latency and reducing overhead. 135874aeea5SJeff Kirsher */ 136874aeea5SJeff Kirsher static unsigned int rx_irq_mod_usec = 60; 137874aeea5SJeff Kirsher 138874aeea5SJeff Kirsher /* Initial interrupt moderation settings. They can be modified after 139874aeea5SJeff Kirsher * module load with ethtool. 140874aeea5SJeff Kirsher * 141874aeea5SJeff Kirsher * This default is chosen to ensure that a 10G link does not go idle 142874aeea5SJeff Kirsher * while a TX queue is stopped after it has become full. A queue is 143874aeea5SJeff Kirsher * restarted when it drops below half full. The time this takes (assuming 144874aeea5SJeff Kirsher * worst case 3 descriptors per packet and 1024 descriptors) is 145874aeea5SJeff Kirsher * 512 / 3 * 1.2 = 205 usec. 146874aeea5SJeff Kirsher */ 147874aeea5SJeff Kirsher static unsigned int tx_irq_mod_usec = 150; 148874aeea5SJeff Kirsher 149874aeea5SJeff Kirsher /* This is the first interrupt mode to try out of: 150874aeea5SJeff Kirsher * 0 => MSI-X 151874aeea5SJeff Kirsher * 1 => MSI 152874aeea5SJeff Kirsher * 2 => legacy 153874aeea5SJeff Kirsher */ 154874aeea5SJeff Kirsher static unsigned int interrupt_mode; 155874aeea5SJeff Kirsher 156874aeea5SJeff Kirsher /* This is the requested number of CPUs to use for Receive-Side Scaling (RSS), 157874aeea5SJeff Kirsher * i.e. the number of CPUs among which we may distribute simultaneous 158874aeea5SJeff Kirsher * interrupt handling. 159874aeea5SJeff Kirsher * 160874aeea5SJeff Kirsher * Cards without MSI-X will only target one CPU via legacy or MSI interrupt. 161cdb08f8fSBen Hutchings * The default (0) means to assign an interrupt to each core. 162874aeea5SJeff Kirsher */ 163874aeea5SJeff Kirsher static unsigned int rss_cpus; 164874aeea5SJeff Kirsher module_param(rss_cpus, uint, 0444); 165874aeea5SJeff Kirsher MODULE_PARM_DESC(rss_cpus, "Number of CPUs to use for Receive-Side Scaling"); 166874aeea5SJeff Kirsher 167b9cc977dSBen Hutchings static bool phy_flash_cfg; 168b9cc977dSBen Hutchings module_param(phy_flash_cfg, bool, 0644); 169874aeea5SJeff Kirsher MODULE_PARM_DESC(phy_flash_cfg, "Set PHYs into reflash mode initially"); 170874aeea5SJeff Kirsher 171e7bed9c8SBen Hutchings static unsigned irq_adapt_low_thresh = 8000; 172874aeea5SJeff Kirsher module_param(irq_adapt_low_thresh, uint, 0644); 173874aeea5SJeff Kirsher MODULE_PARM_DESC(irq_adapt_low_thresh, 174874aeea5SJeff Kirsher "Threshold score for reducing IRQ moderation"); 175874aeea5SJeff Kirsher 176e7bed9c8SBen Hutchings static unsigned irq_adapt_high_thresh = 16000; 177874aeea5SJeff Kirsher module_param(irq_adapt_high_thresh, uint, 0644); 178874aeea5SJeff Kirsher MODULE_PARM_DESC(irq_adapt_high_thresh, 179874aeea5SJeff Kirsher "Threshold score for increasing IRQ moderation"); 180874aeea5SJeff Kirsher 181874aeea5SJeff Kirsher static unsigned debug = (NETIF_MSG_DRV | NETIF_MSG_PROBE | 182874aeea5SJeff Kirsher NETIF_MSG_LINK | NETIF_MSG_IFDOWN | 183874aeea5SJeff Kirsher NETIF_MSG_IFUP | NETIF_MSG_RX_ERR | 184874aeea5SJeff Kirsher NETIF_MSG_TX_ERR | NETIF_MSG_HW); 185874aeea5SJeff Kirsher module_param(debug, uint, 0); 186874aeea5SJeff Kirsher MODULE_PARM_DESC(debug, "Bitmapped debugging message enable value"); 187874aeea5SJeff Kirsher 188874aeea5SJeff Kirsher /************************************************************************** 189874aeea5SJeff Kirsher * 190874aeea5SJeff Kirsher * Utility functions and prototypes 191874aeea5SJeff Kirsher * 192874aeea5SJeff Kirsher *************************************************************************/ 193874aeea5SJeff Kirsher 1947f967c01SBen Hutchings static void efx_start_interrupts(struct efx_nic *efx, bool may_keep_eventq); 1957f967c01SBen Hutchings static void efx_stop_interrupts(struct efx_nic *efx, bool may_keep_eventq); 1967f967c01SBen Hutchings static void efx_remove_channel(struct efx_channel *channel); 197874aeea5SJeff Kirsher static void efx_remove_channels(struct efx_nic *efx); 1987f967c01SBen Hutchings static const struct efx_channel_type efx_default_channel_type; 199874aeea5SJeff Kirsher static void efx_remove_port(struct efx_nic *efx); 2007f967c01SBen Hutchings static void efx_init_napi_channel(struct efx_channel *channel); 201874aeea5SJeff Kirsher static void efx_fini_napi(struct efx_nic *efx); 202874aeea5SJeff Kirsher static void efx_fini_napi_channel(struct efx_channel *channel); 203874aeea5SJeff Kirsher static void efx_fini_struct(struct efx_nic *efx); 204874aeea5SJeff Kirsher static void efx_start_all(struct efx_nic *efx); 205874aeea5SJeff Kirsher static void efx_stop_all(struct efx_nic *efx); 206874aeea5SJeff Kirsher 207874aeea5SJeff Kirsher #define EFX_ASSERT_RESET_SERIALISED(efx) \ 208874aeea5SJeff Kirsher do { \ 209f16aeea0SBen Hutchings if ((efx->state == STATE_READY) || \ 210626950dbSAlexandre Rames (efx->state == STATE_RECOVERY) || \ 211874aeea5SJeff Kirsher (efx->state == STATE_DISABLED)) \ 212874aeea5SJeff Kirsher ASSERT_RTNL(); \ 213874aeea5SJeff Kirsher } while (0) 214874aeea5SJeff Kirsher 2158b7325b4SBen Hutchings static int efx_check_disabled(struct efx_nic *efx) 2168b7325b4SBen Hutchings { 217626950dbSAlexandre Rames if (efx->state == STATE_DISABLED || efx->state == STATE_RECOVERY) { 2188b7325b4SBen Hutchings netif_err(efx, drv, efx->net_dev, 2198b7325b4SBen Hutchings "device is disabled due to earlier errors\n"); 2208b7325b4SBen Hutchings return -EIO; 2218b7325b4SBen Hutchings } 2228b7325b4SBen Hutchings return 0; 2238b7325b4SBen Hutchings } 2248b7325b4SBen Hutchings 225874aeea5SJeff Kirsher /************************************************************************** 226874aeea5SJeff Kirsher * 227874aeea5SJeff Kirsher * Event queue processing 228874aeea5SJeff Kirsher * 229874aeea5SJeff Kirsher *************************************************************************/ 230874aeea5SJeff Kirsher 231874aeea5SJeff Kirsher /* Process channel's event queue 232874aeea5SJeff Kirsher * 233874aeea5SJeff Kirsher * This function is responsible for processing the event queue of a 234874aeea5SJeff Kirsher * single channel. The caller must guarantee that this function will 235874aeea5SJeff Kirsher * never be concurrently called more than once on the same channel, 236874aeea5SJeff Kirsher * though different channels may be being processed concurrently. 237874aeea5SJeff Kirsher */ 238874aeea5SJeff Kirsher static int efx_process_channel(struct efx_channel *channel, int budget) 239874aeea5SJeff Kirsher { 240874aeea5SJeff Kirsher int spent; 241874aeea5SJeff Kirsher 2429f2cb71cSBen Hutchings if (unlikely(!channel->enabled)) 243874aeea5SJeff Kirsher return 0; 244874aeea5SJeff Kirsher 245874aeea5SJeff Kirsher spent = efx_nic_process_eventq(channel, budget); 246d9ab7007SBen Hutchings if (spent && efx_channel_has_rx_queue(channel)) { 247d9ab7007SBen Hutchings struct efx_rx_queue *rx_queue = 248d9ab7007SBen Hutchings efx_channel_get_rx_queue(channel); 249874aeea5SJeff Kirsher 250ff734ef4SBen Hutchings efx_rx_flush_packet(channel); 25197d48a10SAlexandre Rames if (rx_queue->enabled) 252d9ab7007SBen Hutchings efx_fast_push_rx_descriptors(rx_queue); 253d9ab7007SBen Hutchings } 254874aeea5SJeff Kirsher 255874aeea5SJeff Kirsher return spent; 256874aeea5SJeff Kirsher } 257874aeea5SJeff Kirsher 258874aeea5SJeff Kirsher /* Mark channel as finished processing 259874aeea5SJeff Kirsher * 260874aeea5SJeff Kirsher * Note that since we will not receive further interrupts for this 261874aeea5SJeff Kirsher * channel before we finish processing and call the eventq_read_ack() 262874aeea5SJeff Kirsher * method, there is no need to use the interrupt hold-off timers. 263874aeea5SJeff Kirsher */ 264874aeea5SJeff Kirsher static inline void efx_channel_processed(struct efx_channel *channel) 265874aeea5SJeff Kirsher { 266874aeea5SJeff Kirsher /* The interrupt handler for this channel may set work_pending 267874aeea5SJeff Kirsher * as soon as we acknowledge the events we've seen. Make sure 268874aeea5SJeff Kirsher * it's cleared before then. */ 269874aeea5SJeff Kirsher channel->work_pending = false; 270874aeea5SJeff Kirsher smp_wmb(); 271874aeea5SJeff Kirsher 272874aeea5SJeff Kirsher efx_nic_eventq_read_ack(channel); 273874aeea5SJeff Kirsher } 274874aeea5SJeff Kirsher 275874aeea5SJeff Kirsher /* NAPI poll handler 276874aeea5SJeff Kirsher * 277874aeea5SJeff Kirsher * NAPI guarantees serialisation of polls of the same device, which 278874aeea5SJeff Kirsher * provides the guarantee required by efx_process_channel(). 279874aeea5SJeff Kirsher */ 280874aeea5SJeff Kirsher static int efx_poll(struct napi_struct *napi, int budget) 281874aeea5SJeff Kirsher { 282874aeea5SJeff Kirsher struct efx_channel *channel = 283874aeea5SJeff Kirsher container_of(napi, struct efx_channel, napi_str); 284874aeea5SJeff Kirsher struct efx_nic *efx = channel->efx; 285874aeea5SJeff Kirsher int spent; 286874aeea5SJeff Kirsher 287874aeea5SJeff Kirsher netif_vdbg(efx, intr, efx->net_dev, 288874aeea5SJeff Kirsher "channel %d NAPI poll executing on CPU %d\n", 289874aeea5SJeff Kirsher channel->channel, raw_smp_processor_id()); 290874aeea5SJeff Kirsher 291874aeea5SJeff Kirsher spent = efx_process_channel(channel, budget); 292874aeea5SJeff Kirsher 293874aeea5SJeff Kirsher if (spent < budget) { 2949d9a6973SBen Hutchings if (efx_channel_has_rx_queue(channel) && 295874aeea5SJeff Kirsher efx->irq_rx_adaptive && 296874aeea5SJeff Kirsher unlikely(++channel->irq_count == 1000)) { 297874aeea5SJeff Kirsher if (unlikely(channel->irq_mod_score < 298874aeea5SJeff Kirsher irq_adapt_low_thresh)) { 299874aeea5SJeff Kirsher if (channel->irq_moderation > 1) { 300874aeea5SJeff Kirsher channel->irq_moderation -= 1; 301874aeea5SJeff Kirsher efx->type->push_irq_moderation(channel); 302874aeea5SJeff Kirsher } 303874aeea5SJeff Kirsher } else if (unlikely(channel->irq_mod_score > 304874aeea5SJeff Kirsher irq_adapt_high_thresh)) { 305874aeea5SJeff Kirsher if (channel->irq_moderation < 306874aeea5SJeff Kirsher efx->irq_rx_moderation) { 307874aeea5SJeff Kirsher channel->irq_moderation += 1; 308874aeea5SJeff Kirsher efx->type->push_irq_moderation(channel); 309874aeea5SJeff Kirsher } 310874aeea5SJeff Kirsher } 311874aeea5SJeff Kirsher channel->irq_count = 0; 312874aeea5SJeff Kirsher channel->irq_mod_score = 0; 313874aeea5SJeff Kirsher } 314874aeea5SJeff Kirsher 315874aeea5SJeff Kirsher efx_filter_rfs_expire(channel); 316874aeea5SJeff Kirsher 317874aeea5SJeff Kirsher /* There is no race here; although napi_disable() will 318874aeea5SJeff Kirsher * only wait for napi_complete(), this isn't a problem 319874aeea5SJeff Kirsher * since efx_channel_processed() will have no effect if 320874aeea5SJeff Kirsher * interrupts have already been disabled. 321874aeea5SJeff Kirsher */ 322874aeea5SJeff Kirsher napi_complete(napi); 323874aeea5SJeff Kirsher efx_channel_processed(channel); 324874aeea5SJeff Kirsher } 325874aeea5SJeff Kirsher 326874aeea5SJeff Kirsher return spent; 327874aeea5SJeff Kirsher } 328874aeea5SJeff Kirsher 329874aeea5SJeff Kirsher /* Process the eventq of the specified channel immediately on this CPU 330874aeea5SJeff Kirsher * 331874aeea5SJeff Kirsher * Disable hardware generated interrupts, wait for any existing 332874aeea5SJeff Kirsher * processing to finish, then directly poll (and ack ) the eventq. 333874aeea5SJeff Kirsher * Finally reenable NAPI and interrupts. 334874aeea5SJeff Kirsher * 335874aeea5SJeff Kirsher * This is for use only during a loopback self-test. It must not 336874aeea5SJeff Kirsher * deliver any packets up the stack as this can result in deadlock. 337874aeea5SJeff Kirsher */ 338874aeea5SJeff Kirsher void efx_process_channel_now(struct efx_channel *channel) 339874aeea5SJeff Kirsher { 340874aeea5SJeff Kirsher struct efx_nic *efx = channel->efx; 341874aeea5SJeff Kirsher 342874aeea5SJeff Kirsher BUG_ON(channel->channel >= efx->n_channels); 343874aeea5SJeff Kirsher BUG_ON(!channel->enabled); 344874aeea5SJeff Kirsher BUG_ON(!efx->loopback_selftest); 345874aeea5SJeff Kirsher 346874aeea5SJeff Kirsher /* Disable interrupts and wait for ISRs to complete */ 347874aeea5SJeff Kirsher efx_nic_disable_interrupts(efx); 348874aeea5SJeff Kirsher if (efx->legacy_irq) { 349874aeea5SJeff Kirsher synchronize_irq(efx->legacy_irq); 350874aeea5SJeff Kirsher efx->legacy_irq_enabled = false; 351874aeea5SJeff Kirsher } 352874aeea5SJeff Kirsher if (channel->irq) 353874aeea5SJeff Kirsher synchronize_irq(channel->irq); 354874aeea5SJeff Kirsher 355874aeea5SJeff Kirsher /* Wait for any NAPI processing to complete */ 356874aeea5SJeff Kirsher napi_disable(&channel->napi_str); 357874aeea5SJeff Kirsher 358874aeea5SJeff Kirsher /* Poll the channel */ 359874aeea5SJeff Kirsher efx_process_channel(channel, channel->eventq_mask + 1); 360874aeea5SJeff Kirsher 361874aeea5SJeff Kirsher /* Ack the eventq. This may cause an interrupt to be generated 362874aeea5SJeff Kirsher * when they are reenabled */ 363874aeea5SJeff Kirsher efx_channel_processed(channel); 364874aeea5SJeff Kirsher 365874aeea5SJeff Kirsher napi_enable(&channel->napi_str); 366874aeea5SJeff Kirsher if (efx->legacy_irq) 367874aeea5SJeff Kirsher efx->legacy_irq_enabled = true; 368874aeea5SJeff Kirsher efx_nic_enable_interrupts(efx); 369874aeea5SJeff Kirsher } 370874aeea5SJeff Kirsher 371874aeea5SJeff Kirsher /* Create event queue 372874aeea5SJeff Kirsher * Event queue memory allocations are done only once. If the channel 373874aeea5SJeff Kirsher * is reset, the memory buffer will be reused; this guards against 374874aeea5SJeff Kirsher * errors during channel reset and also simplifies interrupt handling. 375874aeea5SJeff Kirsher */ 376874aeea5SJeff Kirsher static int efx_probe_eventq(struct efx_channel *channel) 377874aeea5SJeff Kirsher { 378874aeea5SJeff Kirsher struct efx_nic *efx = channel->efx; 379874aeea5SJeff Kirsher unsigned long entries; 380874aeea5SJeff Kirsher 38186ee5302SBen Hutchings netif_dbg(efx, probe, efx->net_dev, 382874aeea5SJeff Kirsher "chan %d create event queue\n", channel->channel); 383874aeea5SJeff Kirsher 384874aeea5SJeff Kirsher /* Build an event queue with room for one event per tx and rx buffer, 385874aeea5SJeff Kirsher * plus some extra for link state events and MCDI completions. */ 386874aeea5SJeff Kirsher entries = roundup_pow_of_two(efx->rxq_entries + efx->txq_entries + 128); 387874aeea5SJeff Kirsher EFX_BUG_ON_PARANOID(entries > EFX_MAX_EVQ_SIZE); 388874aeea5SJeff Kirsher channel->eventq_mask = max(entries, EFX_MIN_EVQ_SIZE) - 1; 389874aeea5SJeff Kirsher 390874aeea5SJeff Kirsher return efx_nic_probe_eventq(channel); 391874aeea5SJeff Kirsher } 392874aeea5SJeff Kirsher 393874aeea5SJeff Kirsher /* Prepare channel's event queue */ 394874aeea5SJeff Kirsher static void efx_init_eventq(struct efx_channel *channel) 395874aeea5SJeff Kirsher { 396874aeea5SJeff Kirsher netif_dbg(channel->efx, drv, channel->efx->net_dev, 397874aeea5SJeff Kirsher "chan %d init event queue\n", channel->channel); 398874aeea5SJeff Kirsher 399874aeea5SJeff Kirsher channel->eventq_read_ptr = 0; 400874aeea5SJeff Kirsher 401874aeea5SJeff Kirsher efx_nic_init_eventq(channel); 402874aeea5SJeff Kirsher } 403874aeea5SJeff Kirsher 4049f2cb71cSBen Hutchings /* Enable event queue processing and NAPI */ 4059f2cb71cSBen Hutchings static void efx_start_eventq(struct efx_channel *channel) 4069f2cb71cSBen Hutchings { 4079f2cb71cSBen Hutchings netif_dbg(channel->efx, ifup, channel->efx->net_dev, 4089f2cb71cSBen Hutchings "chan %d start event queue\n", channel->channel); 4099f2cb71cSBen Hutchings 4109f2cb71cSBen Hutchings /* The interrupt handler for this channel may set work_pending 4119f2cb71cSBen Hutchings * as soon as we enable it. Make sure it's cleared before 4129f2cb71cSBen Hutchings * then. Similarly, make sure it sees the enabled flag set. 4139f2cb71cSBen Hutchings */ 4149f2cb71cSBen Hutchings channel->work_pending = false; 4159f2cb71cSBen Hutchings channel->enabled = true; 4169f2cb71cSBen Hutchings smp_wmb(); 4179f2cb71cSBen Hutchings 4189f2cb71cSBen Hutchings napi_enable(&channel->napi_str); 4199f2cb71cSBen Hutchings efx_nic_eventq_read_ack(channel); 4209f2cb71cSBen Hutchings } 4219f2cb71cSBen Hutchings 4229f2cb71cSBen Hutchings /* Disable event queue processing and NAPI */ 4239f2cb71cSBen Hutchings static void efx_stop_eventq(struct efx_channel *channel) 4249f2cb71cSBen Hutchings { 4259f2cb71cSBen Hutchings if (!channel->enabled) 4269f2cb71cSBen Hutchings return; 4279f2cb71cSBen Hutchings 4289f2cb71cSBen Hutchings napi_disable(&channel->napi_str); 4299f2cb71cSBen Hutchings channel->enabled = false; 4309f2cb71cSBen Hutchings } 4319f2cb71cSBen Hutchings 432874aeea5SJeff Kirsher static void efx_fini_eventq(struct efx_channel *channel) 433874aeea5SJeff Kirsher { 434874aeea5SJeff Kirsher netif_dbg(channel->efx, drv, channel->efx->net_dev, 435874aeea5SJeff Kirsher "chan %d fini event queue\n", channel->channel); 436874aeea5SJeff Kirsher 437874aeea5SJeff Kirsher efx_nic_fini_eventq(channel); 438874aeea5SJeff Kirsher } 439874aeea5SJeff Kirsher 440874aeea5SJeff Kirsher static void efx_remove_eventq(struct efx_channel *channel) 441874aeea5SJeff Kirsher { 442874aeea5SJeff Kirsher netif_dbg(channel->efx, drv, channel->efx->net_dev, 443874aeea5SJeff Kirsher "chan %d remove event queue\n", channel->channel); 444874aeea5SJeff Kirsher 445874aeea5SJeff Kirsher efx_nic_remove_eventq(channel); 446874aeea5SJeff Kirsher } 447874aeea5SJeff Kirsher 448874aeea5SJeff Kirsher /************************************************************************** 449874aeea5SJeff Kirsher * 450874aeea5SJeff Kirsher * Channel handling 451874aeea5SJeff Kirsher * 452874aeea5SJeff Kirsher *************************************************************************/ 453874aeea5SJeff Kirsher 4547f967c01SBen Hutchings /* Allocate and initialise a channel structure. */ 455874aeea5SJeff Kirsher static struct efx_channel * 456874aeea5SJeff Kirsher efx_alloc_channel(struct efx_nic *efx, int i, struct efx_channel *old_channel) 457874aeea5SJeff Kirsher { 458874aeea5SJeff Kirsher struct efx_channel *channel; 459874aeea5SJeff Kirsher struct efx_rx_queue *rx_queue; 460874aeea5SJeff Kirsher struct efx_tx_queue *tx_queue; 461874aeea5SJeff Kirsher int j; 462874aeea5SJeff Kirsher 4637f967c01SBen Hutchings channel = kzalloc(sizeof(*channel), GFP_KERNEL); 4647f967c01SBen Hutchings if (!channel) 4657f967c01SBen Hutchings return NULL; 4667f967c01SBen Hutchings 4677f967c01SBen Hutchings channel->efx = efx; 4687f967c01SBen Hutchings channel->channel = i; 4697f967c01SBen Hutchings channel->type = &efx_default_channel_type; 4707f967c01SBen Hutchings 4717f967c01SBen Hutchings for (j = 0; j < EFX_TXQ_TYPES; j++) { 4727f967c01SBen Hutchings tx_queue = &channel->tx_queue[j]; 4737f967c01SBen Hutchings tx_queue->efx = efx; 4747f967c01SBen Hutchings tx_queue->queue = i * EFX_TXQ_TYPES + j; 4757f967c01SBen Hutchings tx_queue->channel = channel; 4767f967c01SBen Hutchings } 4777f967c01SBen Hutchings 4787f967c01SBen Hutchings rx_queue = &channel->rx_queue; 4797f967c01SBen Hutchings rx_queue->efx = efx; 4807f967c01SBen Hutchings setup_timer(&rx_queue->slow_fill, efx_rx_slow_fill, 4817f967c01SBen Hutchings (unsigned long)rx_queue); 4827f967c01SBen Hutchings 4837f967c01SBen Hutchings return channel; 4847f967c01SBen Hutchings } 4857f967c01SBen Hutchings 4867f967c01SBen Hutchings /* Allocate and initialise a channel structure, copying parameters 4877f967c01SBen Hutchings * (but not resources) from an old channel structure. 4887f967c01SBen Hutchings */ 4897f967c01SBen Hutchings static struct efx_channel * 4907f967c01SBen Hutchings efx_copy_channel(const struct efx_channel *old_channel) 4917f967c01SBen Hutchings { 4927f967c01SBen Hutchings struct efx_channel *channel; 4937f967c01SBen Hutchings struct efx_rx_queue *rx_queue; 4947f967c01SBen Hutchings struct efx_tx_queue *tx_queue; 4957f967c01SBen Hutchings int j; 4967f967c01SBen Hutchings 497874aeea5SJeff Kirsher channel = kmalloc(sizeof(*channel), GFP_KERNEL); 498874aeea5SJeff Kirsher if (!channel) 499874aeea5SJeff Kirsher return NULL; 500874aeea5SJeff Kirsher 501874aeea5SJeff Kirsher *channel = *old_channel; 502874aeea5SJeff Kirsher 503874aeea5SJeff Kirsher channel->napi_dev = NULL; 504874aeea5SJeff Kirsher memset(&channel->eventq, 0, sizeof(channel->eventq)); 505874aeea5SJeff Kirsher 506874aeea5SJeff Kirsher for (j = 0; j < EFX_TXQ_TYPES; j++) { 507874aeea5SJeff Kirsher tx_queue = &channel->tx_queue[j]; 508874aeea5SJeff Kirsher if (tx_queue->channel) 509874aeea5SJeff Kirsher tx_queue->channel = channel; 510874aeea5SJeff Kirsher tx_queue->buffer = NULL; 511874aeea5SJeff Kirsher memset(&tx_queue->txd, 0, sizeof(tx_queue->txd)); 512874aeea5SJeff Kirsher } 513874aeea5SJeff Kirsher 514874aeea5SJeff Kirsher rx_queue = &channel->rx_queue; 5157f967c01SBen Hutchings rx_queue->buffer = NULL; 5167f967c01SBen Hutchings memset(&rx_queue->rxd, 0, sizeof(rx_queue->rxd)); 517874aeea5SJeff Kirsher setup_timer(&rx_queue->slow_fill, efx_rx_slow_fill, 518874aeea5SJeff Kirsher (unsigned long)rx_queue); 519874aeea5SJeff Kirsher 520874aeea5SJeff Kirsher return channel; 521874aeea5SJeff Kirsher } 522874aeea5SJeff Kirsher 523874aeea5SJeff Kirsher static int efx_probe_channel(struct efx_channel *channel) 524874aeea5SJeff Kirsher { 525874aeea5SJeff Kirsher struct efx_tx_queue *tx_queue; 526874aeea5SJeff Kirsher struct efx_rx_queue *rx_queue; 527874aeea5SJeff Kirsher int rc; 528874aeea5SJeff Kirsher 529874aeea5SJeff Kirsher netif_dbg(channel->efx, probe, channel->efx->net_dev, 530874aeea5SJeff Kirsher "creating channel %d\n", channel->channel); 531874aeea5SJeff Kirsher 5327f967c01SBen Hutchings rc = channel->type->pre_probe(channel); 5337f967c01SBen Hutchings if (rc) 5347f967c01SBen Hutchings goto fail; 5357f967c01SBen Hutchings 536874aeea5SJeff Kirsher rc = efx_probe_eventq(channel); 537874aeea5SJeff Kirsher if (rc) 5387f967c01SBen Hutchings goto fail; 539874aeea5SJeff Kirsher 540874aeea5SJeff Kirsher efx_for_each_channel_tx_queue(tx_queue, channel) { 541874aeea5SJeff Kirsher rc = efx_probe_tx_queue(tx_queue); 542874aeea5SJeff Kirsher if (rc) 5437f967c01SBen Hutchings goto fail; 544874aeea5SJeff Kirsher } 545874aeea5SJeff Kirsher 546874aeea5SJeff Kirsher efx_for_each_channel_rx_queue(rx_queue, channel) { 547874aeea5SJeff Kirsher rc = efx_probe_rx_queue(rx_queue); 548874aeea5SJeff Kirsher if (rc) 5497f967c01SBen Hutchings goto fail; 550874aeea5SJeff Kirsher } 551874aeea5SJeff Kirsher 552874aeea5SJeff Kirsher channel->n_rx_frm_trunc = 0; 553874aeea5SJeff Kirsher 554874aeea5SJeff Kirsher return 0; 555874aeea5SJeff Kirsher 5567f967c01SBen Hutchings fail: 5577f967c01SBen Hutchings efx_remove_channel(channel); 558874aeea5SJeff Kirsher return rc; 559874aeea5SJeff Kirsher } 560874aeea5SJeff Kirsher 5617f967c01SBen Hutchings static void 5627f967c01SBen Hutchings efx_get_channel_name(struct efx_channel *channel, char *buf, size_t len) 5637f967c01SBen Hutchings { 5647f967c01SBen Hutchings struct efx_nic *efx = channel->efx; 5657f967c01SBen Hutchings const char *type; 5667f967c01SBen Hutchings int number; 5677f967c01SBen Hutchings 5687f967c01SBen Hutchings number = channel->channel; 5697f967c01SBen Hutchings if (efx->tx_channel_offset == 0) { 5707f967c01SBen Hutchings type = ""; 5717f967c01SBen Hutchings } else if (channel->channel < efx->tx_channel_offset) { 5727f967c01SBen Hutchings type = "-rx"; 5737f967c01SBen Hutchings } else { 5747f967c01SBen Hutchings type = "-tx"; 5757f967c01SBen Hutchings number -= efx->tx_channel_offset; 5767f967c01SBen Hutchings } 5777f967c01SBen Hutchings snprintf(buf, len, "%s%s-%d", efx->name, type, number); 5787f967c01SBen Hutchings } 579874aeea5SJeff Kirsher 580874aeea5SJeff Kirsher static void efx_set_channel_names(struct efx_nic *efx) 581874aeea5SJeff Kirsher { 582874aeea5SJeff Kirsher struct efx_channel *channel; 583874aeea5SJeff Kirsher 5847f967c01SBen Hutchings efx_for_each_channel(channel, efx) 5857f967c01SBen Hutchings channel->type->get_name(channel, 5867f967c01SBen Hutchings efx->channel_name[channel->channel], 5877f967c01SBen Hutchings sizeof(efx->channel_name[0])); 588874aeea5SJeff Kirsher } 589874aeea5SJeff Kirsher 590874aeea5SJeff Kirsher static int efx_probe_channels(struct efx_nic *efx) 591874aeea5SJeff Kirsher { 592874aeea5SJeff Kirsher struct efx_channel *channel; 593874aeea5SJeff Kirsher int rc; 594874aeea5SJeff Kirsher 595874aeea5SJeff Kirsher /* Restart special buffer allocation */ 596874aeea5SJeff Kirsher efx->next_buffer_table = 0; 597874aeea5SJeff Kirsher 598c92aaff1SBen Hutchings /* Probe channels in reverse, so that any 'extra' channels 599c92aaff1SBen Hutchings * use the start of the buffer table. This allows the traffic 600c92aaff1SBen Hutchings * channels to be resized without moving them or wasting the 601c92aaff1SBen Hutchings * entries before them. 602c92aaff1SBen Hutchings */ 603c92aaff1SBen Hutchings efx_for_each_channel_rev(channel, efx) { 604874aeea5SJeff Kirsher rc = efx_probe_channel(channel); 605874aeea5SJeff Kirsher if (rc) { 606874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 607874aeea5SJeff Kirsher "failed to create channel %d\n", 608874aeea5SJeff Kirsher channel->channel); 609874aeea5SJeff Kirsher goto fail; 610874aeea5SJeff Kirsher } 611874aeea5SJeff Kirsher } 612874aeea5SJeff Kirsher efx_set_channel_names(efx); 613874aeea5SJeff Kirsher 614874aeea5SJeff Kirsher return 0; 615874aeea5SJeff Kirsher 616874aeea5SJeff Kirsher fail: 617874aeea5SJeff Kirsher efx_remove_channels(efx); 618874aeea5SJeff Kirsher return rc; 619874aeea5SJeff Kirsher } 620874aeea5SJeff Kirsher 621874aeea5SJeff Kirsher /* Channels are shutdown and reinitialised whilst the NIC is running 622874aeea5SJeff Kirsher * to propagate configuration changes (mtu, checksum offload), or 623874aeea5SJeff Kirsher * to clear hardware error conditions 624874aeea5SJeff Kirsher */ 6259f2cb71cSBen Hutchings static void efx_start_datapath(struct efx_nic *efx) 626874aeea5SJeff Kirsher { 62785740cdfSBen Hutchings bool old_rx_scatter = efx->rx_scatter; 628874aeea5SJeff Kirsher struct efx_tx_queue *tx_queue; 629874aeea5SJeff Kirsher struct efx_rx_queue *rx_queue; 630874aeea5SJeff Kirsher struct efx_channel *channel; 63185740cdfSBen Hutchings size_t rx_buf_len; 632874aeea5SJeff Kirsher 633874aeea5SJeff Kirsher /* Calculate the rx buffer allocation parameters required to 634874aeea5SJeff Kirsher * support the current MTU, including padding for header 635874aeea5SJeff Kirsher * alignment and overruns. 636874aeea5SJeff Kirsher */ 637272baeebSBen Hutchings efx->rx_dma_len = (efx->type->rx_buffer_hash_size + 638874aeea5SJeff Kirsher EFX_MAX_FRAME_LEN(efx->net_dev->mtu) + 639874aeea5SJeff Kirsher efx->type->rx_buffer_padding); 64085740cdfSBen Hutchings rx_buf_len = (sizeof(struct efx_rx_page_state) + 641c14ff2eaSBen Hutchings NET_IP_ALIGN + efx->rx_dma_len); 64285740cdfSBen Hutchings if (rx_buf_len <= PAGE_SIZE) { 64385740cdfSBen Hutchings efx->rx_scatter = false; 64485740cdfSBen Hutchings efx->rx_buffer_order = 0; 64585740cdfSBen Hutchings } else if (efx->type->can_rx_scatter) { 64685740cdfSBen Hutchings BUILD_BUG_ON(sizeof(struct efx_rx_page_state) + 647c14ff2eaSBen Hutchings NET_IP_ALIGN + EFX_RX_USR_BUF_SIZE > 64885740cdfSBen Hutchings PAGE_SIZE / 2); 64985740cdfSBen Hutchings efx->rx_scatter = true; 65085740cdfSBen Hutchings efx->rx_dma_len = EFX_RX_USR_BUF_SIZE; 65185740cdfSBen Hutchings efx->rx_buffer_order = 0; 65285740cdfSBen Hutchings } else { 65385740cdfSBen Hutchings efx->rx_scatter = false; 65485740cdfSBen Hutchings efx->rx_buffer_order = get_order(rx_buf_len); 65585740cdfSBen Hutchings } 65685740cdfSBen Hutchings 6571648a23fSDaniel Pieczko efx_rx_config_page_split(efx); 6581648a23fSDaniel Pieczko if (efx->rx_buffer_order) 6591648a23fSDaniel Pieczko netif_dbg(efx, drv, efx->net_dev, 6601648a23fSDaniel Pieczko "RX buf len=%u; page order=%u batch=%u\n", 6611648a23fSDaniel Pieczko efx->rx_dma_len, efx->rx_buffer_order, 6621648a23fSDaniel Pieczko efx->rx_pages_per_batch); 6631648a23fSDaniel Pieczko else 6641648a23fSDaniel Pieczko netif_dbg(efx, drv, efx->net_dev, 6651648a23fSDaniel Pieczko "RX buf len=%u step=%u bpp=%u; page batch=%u\n", 6661648a23fSDaniel Pieczko efx->rx_dma_len, efx->rx_page_buf_step, 6671648a23fSDaniel Pieczko efx->rx_bufs_per_page, efx->rx_pages_per_batch); 6682768935aSDaniel Pieczko 66985740cdfSBen Hutchings /* RX filters also have scatter-enabled flags */ 67085740cdfSBen Hutchings if (efx->rx_scatter != old_rx_scatter) 67185740cdfSBen Hutchings efx_filter_update_rx_scatter(efx); 672874aeea5SJeff Kirsher 67314bf718fSBen Hutchings /* We must keep at least one descriptor in a TX ring empty. 67414bf718fSBen Hutchings * We could avoid this when the queue size does not exactly 67514bf718fSBen Hutchings * match the hardware ring size, but it's not that important. 67614bf718fSBen Hutchings * Therefore we stop the queue when one more skb might fill 67714bf718fSBen Hutchings * the ring completely. We wake it when half way back to 67814bf718fSBen Hutchings * empty. 67914bf718fSBen Hutchings */ 68014bf718fSBen Hutchings efx->txq_stop_thresh = efx->txq_entries - efx_tx_max_skb_descs(efx); 68114bf718fSBen Hutchings efx->txq_wake_thresh = efx->txq_stop_thresh / 2; 68214bf718fSBen Hutchings 683874aeea5SJeff Kirsher /* Initialise the channels */ 684874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) { 685874aeea5SJeff Kirsher efx_for_each_channel_tx_queue(tx_queue, channel) 686874aeea5SJeff Kirsher efx_init_tx_queue(tx_queue); 687874aeea5SJeff Kirsher 6889f2cb71cSBen Hutchings efx_for_each_channel_rx_queue(rx_queue, channel) { 689874aeea5SJeff Kirsher efx_init_rx_queue(rx_queue); 6909f2cb71cSBen Hutchings efx_nic_generate_fill_event(rx_queue); 6919f2cb71cSBen Hutchings } 692874aeea5SJeff Kirsher 69385740cdfSBen Hutchings WARN_ON(channel->rx_pkt_n_frags); 694874aeea5SJeff Kirsher } 6959f2cb71cSBen Hutchings 6969f2cb71cSBen Hutchings if (netif_device_present(efx->net_dev)) 6979f2cb71cSBen Hutchings netif_tx_wake_all_queues(efx->net_dev); 698874aeea5SJeff Kirsher } 699874aeea5SJeff Kirsher 7009f2cb71cSBen Hutchings static void efx_stop_datapath(struct efx_nic *efx) 701874aeea5SJeff Kirsher { 702874aeea5SJeff Kirsher struct efx_channel *channel; 703874aeea5SJeff Kirsher struct efx_tx_queue *tx_queue; 704874aeea5SJeff Kirsher struct efx_rx_queue *rx_queue; 7053dca9d2dSStuart Hodgson struct pci_dev *dev = efx->pci_dev; 706874aeea5SJeff Kirsher int rc; 707874aeea5SJeff Kirsher 708874aeea5SJeff Kirsher EFX_ASSERT_RESET_SERIALISED(efx); 709874aeea5SJeff Kirsher BUG_ON(efx->port_enabled); 710874aeea5SJeff Kirsher 7113dca9d2dSStuart Hodgson /* Only perform flush if dma is enabled */ 712626950dbSAlexandre Rames if (dev->is_busmaster && efx->state != STATE_RECOVERY) { 713874aeea5SJeff Kirsher rc = efx_nic_flush_queues(efx); 7143dca9d2dSStuart Hodgson 715874aeea5SJeff Kirsher if (rc && EFX_WORKAROUND_7803(efx)) { 716874aeea5SJeff Kirsher /* Schedule a reset to recover from the flush failure. The 717874aeea5SJeff Kirsher * descriptor caches reference memory we're about to free, 718874aeea5SJeff Kirsher * but falcon_reconfigure_mac_wrapper() won't reconnect 719874aeea5SJeff Kirsher * the MACs because of the pending reset. */ 720874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, 721874aeea5SJeff Kirsher "Resetting to recover from flush failure\n"); 722874aeea5SJeff Kirsher efx_schedule_reset(efx, RESET_TYPE_ALL); 723874aeea5SJeff Kirsher } else if (rc) { 724874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, "failed to flush queues\n"); 725874aeea5SJeff Kirsher } else { 726874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, 727874aeea5SJeff Kirsher "successfully flushed all queues\n"); 728874aeea5SJeff Kirsher } 7293dca9d2dSStuart Hodgson } 730874aeea5SJeff Kirsher 731874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) { 7329f2cb71cSBen Hutchings /* RX packet processing is pipelined, so wait for the 7339f2cb71cSBen Hutchings * NAPI handler to complete. At least event queue 0 7349f2cb71cSBen Hutchings * might be kept active by non-data events, so don't 7359f2cb71cSBen Hutchings * use napi_synchronize() but actually disable NAPI 7369f2cb71cSBen Hutchings * temporarily. 7379f2cb71cSBen Hutchings */ 7389f2cb71cSBen Hutchings if (efx_channel_has_rx_queue(channel)) { 7399f2cb71cSBen Hutchings efx_stop_eventq(channel); 7409f2cb71cSBen Hutchings efx_start_eventq(channel); 7419f2cb71cSBen Hutchings } 742874aeea5SJeff Kirsher 743874aeea5SJeff Kirsher efx_for_each_channel_rx_queue(rx_queue, channel) 744874aeea5SJeff Kirsher efx_fini_rx_queue(rx_queue); 745874aeea5SJeff Kirsher efx_for_each_possible_channel_tx_queue(tx_queue, channel) 746874aeea5SJeff Kirsher efx_fini_tx_queue(tx_queue); 747874aeea5SJeff Kirsher } 748874aeea5SJeff Kirsher } 749874aeea5SJeff Kirsher 750874aeea5SJeff Kirsher static void efx_remove_channel(struct efx_channel *channel) 751874aeea5SJeff Kirsher { 752874aeea5SJeff Kirsher struct efx_tx_queue *tx_queue; 753874aeea5SJeff Kirsher struct efx_rx_queue *rx_queue; 754874aeea5SJeff Kirsher 755874aeea5SJeff Kirsher netif_dbg(channel->efx, drv, channel->efx->net_dev, 756874aeea5SJeff Kirsher "destroy chan %d\n", channel->channel); 757874aeea5SJeff Kirsher 758874aeea5SJeff Kirsher efx_for_each_channel_rx_queue(rx_queue, channel) 759874aeea5SJeff Kirsher efx_remove_rx_queue(rx_queue); 760874aeea5SJeff Kirsher efx_for_each_possible_channel_tx_queue(tx_queue, channel) 761874aeea5SJeff Kirsher efx_remove_tx_queue(tx_queue); 762874aeea5SJeff Kirsher efx_remove_eventq(channel); 763c31e5f9fSStuart Hodgson channel->type->post_remove(channel); 764874aeea5SJeff Kirsher } 765874aeea5SJeff Kirsher 766874aeea5SJeff Kirsher static void efx_remove_channels(struct efx_nic *efx) 767874aeea5SJeff Kirsher { 768874aeea5SJeff Kirsher struct efx_channel *channel; 769874aeea5SJeff Kirsher 770874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) 771874aeea5SJeff Kirsher efx_remove_channel(channel); 772874aeea5SJeff Kirsher } 773874aeea5SJeff Kirsher 774874aeea5SJeff Kirsher int 775874aeea5SJeff Kirsher efx_realloc_channels(struct efx_nic *efx, u32 rxq_entries, u32 txq_entries) 776874aeea5SJeff Kirsher { 777874aeea5SJeff Kirsher struct efx_channel *other_channel[EFX_MAX_CHANNELS], *channel; 778874aeea5SJeff Kirsher u32 old_rxq_entries, old_txq_entries; 7797f967c01SBen Hutchings unsigned i, next_buffer_table = 0; 7808b7325b4SBen Hutchings int rc; 7818b7325b4SBen Hutchings 7828b7325b4SBen Hutchings rc = efx_check_disabled(efx); 7838b7325b4SBen Hutchings if (rc) 7848b7325b4SBen Hutchings return rc; 7857f967c01SBen Hutchings 7867f967c01SBen Hutchings /* Not all channels should be reallocated. We must avoid 7877f967c01SBen Hutchings * reallocating their buffer table entries. 7887f967c01SBen Hutchings */ 7897f967c01SBen Hutchings efx_for_each_channel(channel, efx) { 7907f967c01SBen Hutchings struct efx_rx_queue *rx_queue; 7917f967c01SBen Hutchings struct efx_tx_queue *tx_queue; 7927f967c01SBen Hutchings 7937f967c01SBen Hutchings if (channel->type->copy) 7947f967c01SBen Hutchings continue; 7957f967c01SBen Hutchings next_buffer_table = max(next_buffer_table, 7967f967c01SBen Hutchings channel->eventq.index + 7977f967c01SBen Hutchings channel->eventq.entries); 7987f967c01SBen Hutchings efx_for_each_channel_rx_queue(rx_queue, channel) 7997f967c01SBen Hutchings next_buffer_table = max(next_buffer_table, 8007f967c01SBen Hutchings rx_queue->rxd.index + 8017f967c01SBen Hutchings rx_queue->rxd.entries); 8027f967c01SBen Hutchings efx_for_each_channel_tx_queue(tx_queue, channel) 8037f967c01SBen Hutchings next_buffer_table = max(next_buffer_table, 8047f967c01SBen Hutchings tx_queue->txd.index + 8057f967c01SBen Hutchings tx_queue->txd.entries); 8067f967c01SBen Hutchings } 807874aeea5SJeff Kirsher 80829c69a48SBen Hutchings efx_device_detach_sync(efx); 809874aeea5SJeff Kirsher efx_stop_all(efx); 8107f967c01SBen Hutchings efx_stop_interrupts(efx, true); 811874aeea5SJeff Kirsher 8127f967c01SBen Hutchings /* Clone channels (where possible) */ 813874aeea5SJeff Kirsher memset(other_channel, 0, sizeof(other_channel)); 814874aeea5SJeff Kirsher for (i = 0; i < efx->n_channels; i++) { 8157f967c01SBen Hutchings channel = efx->channel[i]; 8167f967c01SBen Hutchings if (channel->type->copy) 8177f967c01SBen Hutchings channel = channel->type->copy(channel); 818874aeea5SJeff Kirsher if (!channel) { 819874aeea5SJeff Kirsher rc = -ENOMEM; 820874aeea5SJeff Kirsher goto out; 821874aeea5SJeff Kirsher } 822874aeea5SJeff Kirsher other_channel[i] = channel; 823874aeea5SJeff Kirsher } 824874aeea5SJeff Kirsher 825874aeea5SJeff Kirsher /* Swap entry counts and channel pointers */ 826874aeea5SJeff Kirsher old_rxq_entries = efx->rxq_entries; 827874aeea5SJeff Kirsher old_txq_entries = efx->txq_entries; 828874aeea5SJeff Kirsher efx->rxq_entries = rxq_entries; 829874aeea5SJeff Kirsher efx->txq_entries = txq_entries; 830874aeea5SJeff Kirsher for (i = 0; i < efx->n_channels; i++) { 831874aeea5SJeff Kirsher channel = efx->channel[i]; 832874aeea5SJeff Kirsher efx->channel[i] = other_channel[i]; 833874aeea5SJeff Kirsher other_channel[i] = channel; 834874aeea5SJeff Kirsher } 835874aeea5SJeff Kirsher 8367f967c01SBen Hutchings /* Restart buffer table allocation */ 8377f967c01SBen Hutchings efx->next_buffer_table = next_buffer_table; 8387f967c01SBen Hutchings 8397f967c01SBen Hutchings for (i = 0; i < efx->n_channels; i++) { 8407f967c01SBen Hutchings channel = efx->channel[i]; 8417f967c01SBen Hutchings if (!channel->type->copy) 8427f967c01SBen Hutchings continue; 8437f967c01SBen Hutchings rc = efx_probe_channel(channel); 844874aeea5SJeff Kirsher if (rc) 845874aeea5SJeff Kirsher goto rollback; 8467f967c01SBen Hutchings efx_init_napi_channel(efx->channel[i]); 847874aeea5SJeff Kirsher } 848874aeea5SJeff Kirsher 8497f967c01SBen Hutchings out: 8507f967c01SBen Hutchings /* Destroy unused channel structures */ 8517f967c01SBen Hutchings for (i = 0; i < efx->n_channels; i++) { 8527f967c01SBen Hutchings channel = other_channel[i]; 8537f967c01SBen Hutchings if (channel && channel->type->copy) { 8547f967c01SBen Hutchings efx_fini_napi_channel(channel); 8557f967c01SBen Hutchings efx_remove_channel(channel); 8567f967c01SBen Hutchings kfree(channel); 8577f967c01SBen Hutchings } 8587f967c01SBen Hutchings } 8597f967c01SBen Hutchings 8607f967c01SBen Hutchings efx_start_interrupts(efx, true); 861874aeea5SJeff Kirsher efx_start_all(efx); 86229c69a48SBen Hutchings netif_device_attach(efx->net_dev); 863874aeea5SJeff Kirsher return rc; 864874aeea5SJeff Kirsher 865874aeea5SJeff Kirsher rollback: 866874aeea5SJeff Kirsher /* Swap back */ 867874aeea5SJeff Kirsher efx->rxq_entries = old_rxq_entries; 868874aeea5SJeff Kirsher efx->txq_entries = old_txq_entries; 869874aeea5SJeff Kirsher for (i = 0; i < efx->n_channels; i++) { 870874aeea5SJeff Kirsher channel = efx->channel[i]; 871874aeea5SJeff Kirsher efx->channel[i] = other_channel[i]; 872874aeea5SJeff Kirsher other_channel[i] = channel; 873874aeea5SJeff Kirsher } 874874aeea5SJeff Kirsher goto out; 875874aeea5SJeff Kirsher } 876874aeea5SJeff Kirsher 877874aeea5SJeff Kirsher void efx_schedule_slow_fill(struct efx_rx_queue *rx_queue) 878874aeea5SJeff Kirsher { 879874aeea5SJeff Kirsher mod_timer(&rx_queue->slow_fill, jiffies + msecs_to_jiffies(100)); 880874aeea5SJeff Kirsher } 881874aeea5SJeff Kirsher 8827f967c01SBen Hutchings static const struct efx_channel_type efx_default_channel_type = { 8837f967c01SBen Hutchings .pre_probe = efx_channel_dummy_op_int, 884c31e5f9fSStuart Hodgson .post_remove = efx_channel_dummy_op_void, 8857f967c01SBen Hutchings .get_name = efx_get_channel_name, 8867f967c01SBen Hutchings .copy = efx_copy_channel, 8877f967c01SBen Hutchings .keep_eventq = false, 8887f967c01SBen Hutchings }; 8897f967c01SBen Hutchings 8907f967c01SBen Hutchings int efx_channel_dummy_op_int(struct efx_channel *channel) 8917f967c01SBen Hutchings { 8927f967c01SBen Hutchings return 0; 8937f967c01SBen Hutchings } 8947f967c01SBen Hutchings 895c31e5f9fSStuart Hodgson void efx_channel_dummy_op_void(struct efx_channel *channel) 896c31e5f9fSStuart Hodgson { 897c31e5f9fSStuart Hodgson } 898c31e5f9fSStuart Hodgson 899874aeea5SJeff Kirsher /************************************************************************** 900874aeea5SJeff Kirsher * 901874aeea5SJeff Kirsher * Port handling 902874aeea5SJeff Kirsher * 903874aeea5SJeff Kirsher **************************************************************************/ 904874aeea5SJeff Kirsher 905874aeea5SJeff Kirsher /* This ensures that the kernel is kept informed (via 906874aeea5SJeff Kirsher * netif_carrier_on/off) of the link status, and also maintains the 907874aeea5SJeff Kirsher * link status's stop on the port's TX queue. 908874aeea5SJeff Kirsher */ 909874aeea5SJeff Kirsher void efx_link_status_changed(struct efx_nic *efx) 910874aeea5SJeff Kirsher { 911874aeea5SJeff Kirsher struct efx_link_state *link_state = &efx->link_state; 912874aeea5SJeff Kirsher 913874aeea5SJeff Kirsher /* SFC Bug 5356: A net_dev notifier is registered, so we must ensure 914874aeea5SJeff Kirsher * that no events are triggered between unregister_netdev() and the 915874aeea5SJeff Kirsher * driver unloading. A more general condition is that NETDEV_CHANGE 916874aeea5SJeff Kirsher * can only be generated between NETDEV_UP and NETDEV_DOWN */ 917874aeea5SJeff Kirsher if (!netif_running(efx->net_dev)) 918874aeea5SJeff Kirsher return; 919874aeea5SJeff Kirsher 920874aeea5SJeff Kirsher if (link_state->up != netif_carrier_ok(efx->net_dev)) { 921874aeea5SJeff Kirsher efx->n_link_state_changes++; 922874aeea5SJeff Kirsher 923874aeea5SJeff Kirsher if (link_state->up) 924874aeea5SJeff Kirsher netif_carrier_on(efx->net_dev); 925874aeea5SJeff Kirsher else 926874aeea5SJeff Kirsher netif_carrier_off(efx->net_dev); 927874aeea5SJeff Kirsher } 928874aeea5SJeff Kirsher 929874aeea5SJeff Kirsher /* Status message for kernel log */ 9302aa9ef11SBen Hutchings if (link_state->up) 931874aeea5SJeff Kirsher netif_info(efx, link, efx->net_dev, 932874aeea5SJeff Kirsher "link up at %uMbps %s-duplex (MTU %d)%s\n", 933874aeea5SJeff Kirsher link_state->speed, link_state->fd ? "full" : "half", 934874aeea5SJeff Kirsher efx->net_dev->mtu, 935874aeea5SJeff Kirsher (efx->promiscuous ? " [PROMISC]" : "")); 9362aa9ef11SBen Hutchings else 937874aeea5SJeff Kirsher netif_info(efx, link, efx->net_dev, "link down\n"); 938874aeea5SJeff Kirsher } 939874aeea5SJeff Kirsher 940874aeea5SJeff Kirsher void efx_link_set_advertising(struct efx_nic *efx, u32 advertising) 941874aeea5SJeff Kirsher { 942874aeea5SJeff Kirsher efx->link_advertising = advertising; 943874aeea5SJeff Kirsher if (advertising) { 944874aeea5SJeff Kirsher if (advertising & ADVERTISED_Pause) 945874aeea5SJeff Kirsher efx->wanted_fc |= (EFX_FC_TX | EFX_FC_RX); 946874aeea5SJeff Kirsher else 947874aeea5SJeff Kirsher efx->wanted_fc &= ~(EFX_FC_TX | EFX_FC_RX); 948874aeea5SJeff Kirsher if (advertising & ADVERTISED_Asym_Pause) 949874aeea5SJeff Kirsher efx->wanted_fc ^= EFX_FC_TX; 950874aeea5SJeff Kirsher } 951874aeea5SJeff Kirsher } 952874aeea5SJeff Kirsher 953874aeea5SJeff Kirsher void efx_link_set_wanted_fc(struct efx_nic *efx, u8 wanted_fc) 954874aeea5SJeff Kirsher { 955874aeea5SJeff Kirsher efx->wanted_fc = wanted_fc; 956874aeea5SJeff Kirsher if (efx->link_advertising) { 957874aeea5SJeff Kirsher if (wanted_fc & EFX_FC_RX) 958874aeea5SJeff Kirsher efx->link_advertising |= (ADVERTISED_Pause | 959874aeea5SJeff Kirsher ADVERTISED_Asym_Pause); 960874aeea5SJeff Kirsher else 961874aeea5SJeff Kirsher efx->link_advertising &= ~(ADVERTISED_Pause | 962874aeea5SJeff Kirsher ADVERTISED_Asym_Pause); 963874aeea5SJeff Kirsher if (wanted_fc & EFX_FC_TX) 964874aeea5SJeff Kirsher efx->link_advertising ^= ADVERTISED_Asym_Pause; 965874aeea5SJeff Kirsher } 966874aeea5SJeff Kirsher } 967874aeea5SJeff Kirsher 968874aeea5SJeff Kirsher static void efx_fini_port(struct efx_nic *efx); 969874aeea5SJeff Kirsher 970874aeea5SJeff Kirsher /* Push loopback/power/transmit disable settings to the PHY, and reconfigure 971874aeea5SJeff Kirsher * the MAC appropriately. All other PHY configuration changes are pushed 972874aeea5SJeff Kirsher * through phy_op->set_settings(), and pushed asynchronously to the MAC 973874aeea5SJeff Kirsher * through efx_monitor(). 974874aeea5SJeff Kirsher * 975874aeea5SJeff Kirsher * Callers must hold the mac_lock 976874aeea5SJeff Kirsher */ 977874aeea5SJeff Kirsher int __efx_reconfigure_port(struct efx_nic *efx) 978874aeea5SJeff Kirsher { 979874aeea5SJeff Kirsher enum efx_phy_mode phy_mode; 980874aeea5SJeff Kirsher int rc; 981874aeea5SJeff Kirsher 982874aeea5SJeff Kirsher WARN_ON(!mutex_is_locked(&efx->mac_lock)); 983874aeea5SJeff Kirsher 9840fca8c97SBen Hutchings /* Serialise the promiscuous flag with efx_set_rx_mode. */ 985874aeea5SJeff Kirsher netif_addr_lock_bh(efx->net_dev); 986874aeea5SJeff Kirsher netif_addr_unlock_bh(efx->net_dev); 987874aeea5SJeff Kirsher 988874aeea5SJeff Kirsher /* Disable PHY transmit in mac level loopbacks */ 989874aeea5SJeff Kirsher phy_mode = efx->phy_mode; 990874aeea5SJeff Kirsher if (LOOPBACK_INTERNAL(efx)) 991874aeea5SJeff Kirsher efx->phy_mode |= PHY_MODE_TX_DISABLED; 992874aeea5SJeff Kirsher else 993874aeea5SJeff Kirsher efx->phy_mode &= ~PHY_MODE_TX_DISABLED; 994874aeea5SJeff Kirsher 995874aeea5SJeff Kirsher rc = efx->type->reconfigure_port(efx); 996874aeea5SJeff Kirsher 997874aeea5SJeff Kirsher if (rc) 998874aeea5SJeff Kirsher efx->phy_mode = phy_mode; 999874aeea5SJeff Kirsher 1000874aeea5SJeff Kirsher return rc; 1001874aeea5SJeff Kirsher } 1002874aeea5SJeff Kirsher 1003874aeea5SJeff Kirsher /* Reinitialise the MAC to pick up new PHY settings, even if the port is 1004874aeea5SJeff Kirsher * disabled. */ 1005874aeea5SJeff Kirsher int efx_reconfigure_port(struct efx_nic *efx) 1006874aeea5SJeff Kirsher { 1007874aeea5SJeff Kirsher int rc; 1008874aeea5SJeff Kirsher 1009874aeea5SJeff Kirsher EFX_ASSERT_RESET_SERIALISED(efx); 1010874aeea5SJeff Kirsher 1011874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 1012874aeea5SJeff Kirsher rc = __efx_reconfigure_port(efx); 1013874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 1014874aeea5SJeff Kirsher 1015874aeea5SJeff Kirsher return rc; 1016874aeea5SJeff Kirsher } 1017874aeea5SJeff Kirsher 1018874aeea5SJeff Kirsher /* Asynchronous work item for changing MAC promiscuity and multicast 1019874aeea5SJeff Kirsher * hash. Avoid a drain/rx_ingress enable by reconfiguring the current 1020874aeea5SJeff Kirsher * MAC directly. */ 1021874aeea5SJeff Kirsher static void efx_mac_work(struct work_struct *data) 1022874aeea5SJeff Kirsher { 1023874aeea5SJeff Kirsher struct efx_nic *efx = container_of(data, struct efx_nic, mac_work); 1024874aeea5SJeff Kirsher 1025874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 102630b81cdaSBen Hutchings if (efx->port_enabled) 1027710b208dSBen Hutchings efx->type->reconfigure_mac(efx); 1028874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 1029874aeea5SJeff Kirsher } 1030874aeea5SJeff Kirsher 1031874aeea5SJeff Kirsher static int efx_probe_port(struct efx_nic *efx) 1032874aeea5SJeff Kirsher { 1033874aeea5SJeff Kirsher int rc; 1034874aeea5SJeff Kirsher 1035874aeea5SJeff Kirsher netif_dbg(efx, probe, efx->net_dev, "create port\n"); 1036874aeea5SJeff Kirsher 1037874aeea5SJeff Kirsher if (phy_flash_cfg) 1038874aeea5SJeff Kirsher efx->phy_mode = PHY_MODE_SPECIAL; 1039874aeea5SJeff Kirsher 1040874aeea5SJeff Kirsher /* Connect up MAC/PHY operations table */ 1041874aeea5SJeff Kirsher rc = efx->type->probe_port(efx); 1042874aeea5SJeff Kirsher if (rc) 1043874aeea5SJeff Kirsher return rc; 1044874aeea5SJeff Kirsher 1045e332bcb3SBen Hutchings /* Initialise MAC address to permanent address */ 1046e332bcb3SBen Hutchings memcpy(efx->net_dev->dev_addr, efx->net_dev->perm_addr, ETH_ALEN); 1047874aeea5SJeff Kirsher 1048874aeea5SJeff Kirsher return 0; 1049874aeea5SJeff Kirsher } 1050874aeea5SJeff Kirsher 1051874aeea5SJeff Kirsher static int efx_init_port(struct efx_nic *efx) 1052874aeea5SJeff Kirsher { 1053874aeea5SJeff Kirsher int rc; 1054874aeea5SJeff Kirsher 1055874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "init port\n"); 1056874aeea5SJeff Kirsher 1057874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 1058874aeea5SJeff Kirsher 1059874aeea5SJeff Kirsher rc = efx->phy_op->init(efx); 1060874aeea5SJeff Kirsher if (rc) 1061874aeea5SJeff Kirsher goto fail1; 1062874aeea5SJeff Kirsher 1063874aeea5SJeff Kirsher efx->port_initialized = true; 1064874aeea5SJeff Kirsher 1065874aeea5SJeff Kirsher /* Reconfigure the MAC before creating dma queues (required for 1066874aeea5SJeff Kirsher * Falcon/A1 where RX_INGR_EN/TX_DRAIN_EN isn't supported) */ 1067710b208dSBen Hutchings efx->type->reconfigure_mac(efx); 1068874aeea5SJeff Kirsher 1069874aeea5SJeff Kirsher /* Ensure the PHY advertises the correct flow control settings */ 1070874aeea5SJeff Kirsher rc = efx->phy_op->reconfigure(efx); 1071874aeea5SJeff Kirsher if (rc) 1072874aeea5SJeff Kirsher goto fail2; 1073874aeea5SJeff Kirsher 1074874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 1075874aeea5SJeff Kirsher return 0; 1076874aeea5SJeff Kirsher 1077874aeea5SJeff Kirsher fail2: 1078874aeea5SJeff Kirsher efx->phy_op->fini(efx); 1079874aeea5SJeff Kirsher fail1: 1080874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 1081874aeea5SJeff Kirsher return rc; 1082874aeea5SJeff Kirsher } 1083874aeea5SJeff Kirsher 1084874aeea5SJeff Kirsher static void efx_start_port(struct efx_nic *efx) 1085874aeea5SJeff Kirsher { 1086874aeea5SJeff Kirsher netif_dbg(efx, ifup, efx->net_dev, "start port\n"); 1087874aeea5SJeff Kirsher BUG_ON(efx->port_enabled); 1088874aeea5SJeff Kirsher 1089874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 1090874aeea5SJeff Kirsher efx->port_enabled = true; 1091874aeea5SJeff Kirsher 1092874aeea5SJeff Kirsher /* efx_mac_work() might have been scheduled after efx_stop_port(), 1093874aeea5SJeff Kirsher * and then cancelled by efx_flush_all() */ 1094710b208dSBen Hutchings efx->type->reconfigure_mac(efx); 1095874aeea5SJeff Kirsher 1096874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 1097874aeea5SJeff Kirsher } 1098874aeea5SJeff Kirsher 1099874aeea5SJeff Kirsher /* Prevent efx_mac_work() and efx_monitor() from working */ 1100874aeea5SJeff Kirsher static void efx_stop_port(struct efx_nic *efx) 1101874aeea5SJeff Kirsher { 1102874aeea5SJeff Kirsher netif_dbg(efx, ifdown, efx->net_dev, "stop port\n"); 1103874aeea5SJeff Kirsher 1104874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 1105874aeea5SJeff Kirsher efx->port_enabled = false; 1106874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 1107874aeea5SJeff Kirsher 1108874aeea5SJeff Kirsher /* Serialise against efx_set_multicast_list() */ 1109874aeea5SJeff Kirsher netif_addr_lock_bh(efx->net_dev); 1110874aeea5SJeff Kirsher netif_addr_unlock_bh(efx->net_dev); 1111874aeea5SJeff Kirsher } 1112874aeea5SJeff Kirsher 1113874aeea5SJeff Kirsher static void efx_fini_port(struct efx_nic *efx) 1114874aeea5SJeff Kirsher { 1115874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "shut down port\n"); 1116874aeea5SJeff Kirsher 1117874aeea5SJeff Kirsher if (!efx->port_initialized) 1118874aeea5SJeff Kirsher return; 1119874aeea5SJeff Kirsher 1120874aeea5SJeff Kirsher efx->phy_op->fini(efx); 1121874aeea5SJeff Kirsher efx->port_initialized = false; 1122874aeea5SJeff Kirsher 1123874aeea5SJeff Kirsher efx->link_state.up = false; 1124874aeea5SJeff Kirsher efx_link_status_changed(efx); 1125874aeea5SJeff Kirsher } 1126874aeea5SJeff Kirsher 1127874aeea5SJeff Kirsher static void efx_remove_port(struct efx_nic *efx) 1128874aeea5SJeff Kirsher { 1129874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "destroying port\n"); 1130874aeea5SJeff Kirsher 1131874aeea5SJeff Kirsher efx->type->remove_port(efx); 1132874aeea5SJeff Kirsher } 1133874aeea5SJeff Kirsher 1134874aeea5SJeff Kirsher /************************************************************************** 1135874aeea5SJeff Kirsher * 1136874aeea5SJeff Kirsher * NIC handling 1137874aeea5SJeff Kirsher * 1138874aeea5SJeff Kirsher **************************************************************************/ 1139874aeea5SJeff Kirsher 1140874aeea5SJeff Kirsher /* This configures the PCI device to enable I/O and DMA. */ 1141874aeea5SJeff Kirsher static int efx_init_io(struct efx_nic *efx) 1142874aeea5SJeff Kirsher { 1143874aeea5SJeff Kirsher struct pci_dev *pci_dev = efx->pci_dev; 1144874aeea5SJeff Kirsher dma_addr_t dma_mask = efx->type->max_dma_mask; 1145874aeea5SJeff Kirsher int rc; 1146874aeea5SJeff Kirsher 1147874aeea5SJeff Kirsher netif_dbg(efx, probe, efx->net_dev, "initialising I/O\n"); 1148874aeea5SJeff Kirsher 1149874aeea5SJeff Kirsher rc = pci_enable_device(pci_dev); 1150874aeea5SJeff Kirsher if (rc) { 1151874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 1152874aeea5SJeff Kirsher "failed to enable PCI device\n"); 1153874aeea5SJeff Kirsher goto fail1; 1154874aeea5SJeff Kirsher } 1155874aeea5SJeff Kirsher 1156874aeea5SJeff Kirsher pci_set_master(pci_dev); 1157874aeea5SJeff Kirsher 1158874aeea5SJeff Kirsher /* Set the PCI DMA mask. Try all possibilities from our 1159874aeea5SJeff Kirsher * genuine mask down to 32 bits, because some architectures 1160874aeea5SJeff Kirsher * (e.g. x86_64 with iommu_sac_force set) will allow 40 bit 1161874aeea5SJeff Kirsher * masks event though they reject 46 bit masks. 1162874aeea5SJeff Kirsher */ 1163874aeea5SJeff Kirsher while (dma_mask > 0x7fffffffUL) { 11640e33d870SBen Hutchings if (dma_supported(&pci_dev->dev, dma_mask)) { 11650e33d870SBen Hutchings rc = dma_set_mask(&pci_dev->dev, dma_mask); 1166e9e01846SBen Hutchings if (rc == 0) 1167874aeea5SJeff Kirsher break; 1168e9e01846SBen Hutchings } 1169874aeea5SJeff Kirsher dma_mask >>= 1; 1170874aeea5SJeff Kirsher } 1171874aeea5SJeff Kirsher if (rc) { 1172874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 1173874aeea5SJeff Kirsher "could not find a suitable DMA mask\n"); 1174874aeea5SJeff Kirsher goto fail2; 1175874aeea5SJeff Kirsher } 1176874aeea5SJeff Kirsher netif_dbg(efx, probe, efx->net_dev, 1177874aeea5SJeff Kirsher "using DMA mask %llx\n", (unsigned long long) dma_mask); 11780e33d870SBen Hutchings rc = dma_set_coherent_mask(&pci_dev->dev, dma_mask); 1179874aeea5SJeff Kirsher if (rc) { 11800e33d870SBen Hutchings /* dma_set_coherent_mask() is not *allowed* to 11810e33d870SBen Hutchings * fail with a mask that dma_set_mask() accepted, 1182874aeea5SJeff Kirsher * but just in case... 1183874aeea5SJeff Kirsher */ 1184874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 1185874aeea5SJeff Kirsher "failed to set consistent DMA mask\n"); 1186874aeea5SJeff Kirsher goto fail2; 1187874aeea5SJeff Kirsher } 1188874aeea5SJeff Kirsher 1189874aeea5SJeff Kirsher efx->membase_phys = pci_resource_start(efx->pci_dev, EFX_MEM_BAR); 1190874aeea5SJeff Kirsher rc = pci_request_region(pci_dev, EFX_MEM_BAR, "sfc"); 1191874aeea5SJeff Kirsher if (rc) { 1192874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 1193874aeea5SJeff Kirsher "request for memory BAR failed\n"); 1194874aeea5SJeff Kirsher rc = -EIO; 1195874aeea5SJeff Kirsher goto fail3; 1196874aeea5SJeff Kirsher } 1197874aeea5SJeff Kirsher efx->membase = ioremap_nocache(efx->membase_phys, 1198874aeea5SJeff Kirsher efx->type->mem_map_size); 1199874aeea5SJeff Kirsher if (!efx->membase) { 1200874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 1201874aeea5SJeff Kirsher "could not map memory BAR at %llx+%x\n", 1202874aeea5SJeff Kirsher (unsigned long long)efx->membase_phys, 1203874aeea5SJeff Kirsher efx->type->mem_map_size); 1204874aeea5SJeff Kirsher rc = -ENOMEM; 1205874aeea5SJeff Kirsher goto fail4; 1206874aeea5SJeff Kirsher } 1207874aeea5SJeff Kirsher netif_dbg(efx, probe, efx->net_dev, 1208874aeea5SJeff Kirsher "memory BAR at %llx+%x (virtual %p)\n", 1209874aeea5SJeff Kirsher (unsigned long long)efx->membase_phys, 1210874aeea5SJeff Kirsher efx->type->mem_map_size, efx->membase); 1211874aeea5SJeff Kirsher 1212874aeea5SJeff Kirsher return 0; 1213874aeea5SJeff Kirsher 1214874aeea5SJeff Kirsher fail4: 1215874aeea5SJeff Kirsher pci_release_region(efx->pci_dev, EFX_MEM_BAR); 1216874aeea5SJeff Kirsher fail3: 1217874aeea5SJeff Kirsher efx->membase_phys = 0; 1218874aeea5SJeff Kirsher fail2: 1219874aeea5SJeff Kirsher pci_disable_device(efx->pci_dev); 1220874aeea5SJeff Kirsher fail1: 1221874aeea5SJeff Kirsher return rc; 1222874aeea5SJeff Kirsher } 1223874aeea5SJeff Kirsher 1224874aeea5SJeff Kirsher static void efx_fini_io(struct efx_nic *efx) 1225874aeea5SJeff Kirsher { 1226874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "shutting down I/O\n"); 1227874aeea5SJeff Kirsher 1228874aeea5SJeff Kirsher if (efx->membase) { 1229874aeea5SJeff Kirsher iounmap(efx->membase); 1230874aeea5SJeff Kirsher efx->membase = NULL; 1231874aeea5SJeff Kirsher } 1232874aeea5SJeff Kirsher 1233874aeea5SJeff Kirsher if (efx->membase_phys) { 1234874aeea5SJeff Kirsher pci_release_region(efx->pci_dev, EFX_MEM_BAR); 1235874aeea5SJeff Kirsher efx->membase_phys = 0; 1236874aeea5SJeff Kirsher } 1237874aeea5SJeff Kirsher 1238874aeea5SJeff Kirsher pci_disable_device(efx->pci_dev); 1239874aeea5SJeff Kirsher } 1240874aeea5SJeff Kirsher 1241a9a52506SBen Hutchings static unsigned int efx_wanted_parallelism(struct efx_nic *efx) 1242874aeea5SJeff Kirsher { 1243cdb08f8fSBen Hutchings cpumask_var_t thread_mask; 1244a16e5b24SBen Hutchings unsigned int count; 1245874aeea5SJeff Kirsher int cpu; 1246874aeea5SJeff Kirsher 1247cd2d5b52SBen Hutchings if (rss_cpus) { 1248cd2d5b52SBen Hutchings count = rss_cpus; 1249cd2d5b52SBen Hutchings } else { 1250cdb08f8fSBen Hutchings if (unlikely(!zalloc_cpumask_var(&thread_mask, GFP_KERNEL))) { 1251a9a52506SBen Hutchings netif_warn(efx, probe, efx->net_dev, 1252a9a52506SBen Hutchings "RSS disabled due to allocation failure\n"); 1253874aeea5SJeff Kirsher return 1; 1254874aeea5SJeff Kirsher } 1255874aeea5SJeff Kirsher 1256874aeea5SJeff Kirsher count = 0; 1257874aeea5SJeff Kirsher for_each_online_cpu(cpu) { 1258cdb08f8fSBen Hutchings if (!cpumask_test_cpu(cpu, thread_mask)) { 1259874aeea5SJeff Kirsher ++count; 1260cdb08f8fSBen Hutchings cpumask_or(thread_mask, thread_mask, 1261cdb08f8fSBen Hutchings topology_thread_cpumask(cpu)); 1262874aeea5SJeff Kirsher } 1263874aeea5SJeff Kirsher } 1264874aeea5SJeff Kirsher 1265cdb08f8fSBen Hutchings free_cpumask_var(thread_mask); 1266cd2d5b52SBen Hutchings } 1267cd2d5b52SBen Hutchings 1268cd2d5b52SBen Hutchings /* If RSS is requested for the PF *and* VFs then we can't write RSS 1269cd2d5b52SBen Hutchings * table entries that are inaccessible to VFs 1270cd2d5b52SBen Hutchings */ 1271cd2d5b52SBen Hutchings if (efx_sriov_wanted(efx) && efx_vf_size(efx) > 1 && 1272cd2d5b52SBen Hutchings count > efx_vf_size(efx)) { 1273cd2d5b52SBen Hutchings netif_warn(efx, probe, efx->net_dev, 1274cd2d5b52SBen Hutchings "Reducing number of RSS channels from %u to %u for " 1275cd2d5b52SBen Hutchings "VF support. Increase vf-msix-limit to use more " 1276cd2d5b52SBen Hutchings "channels on the PF.\n", 1277cd2d5b52SBen Hutchings count, efx_vf_size(efx)); 1278cd2d5b52SBen Hutchings count = efx_vf_size(efx); 1279cd2d5b52SBen Hutchings } 1280cd2d5b52SBen Hutchings 1281874aeea5SJeff Kirsher return count; 1282874aeea5SJeff Kirsher } 1283874aeea5SJeff Kirsher 1284874aeea5SJeff Kirsher static int 1285874aeea5SJeff Kirsher efx_init_rx_cpu_rmap(struct efx_nic *efx, struct msix_entry *xentries) 1286874aeea5SJeff Kirsher { 1287874aeea5SJeff Kirsher #ifdef CONFIG_RFS_ACCEL 1288a16e5b24SBen Hutchings unsigned int i; 1289a16e5b24SBen Hutchings int rc; 1290874aeea5SJeff Kirsher 1291874aeea5SJeff Kirsher efx->net_dev->rx_cpu_rmap = alloc_irq_cpu_rmap(efx->n_rx_channels); 1292874aeea5SJeff Kirsher if (!efx->net_dev->rx_cpu_rmap) 1293874aeea5SJeff Kirsher return -ENOMEM; 1294874aeea5SJeff Kirsher for (i = 0; i < efx->n_rx_channels; i++) { 1295874aeea5SJeff Kirsher rc = irq_cpu_rmap_add(efx->net_dev->rx_cpu_rmap, 1296874aeea5SJeff Kirsher xentries[i].vector); 1297874aeea5SJeff Kirsher if (rc) { 1298874aeea5SJeff Kirsher free_irq_cpu_rmap(efx->net_dev->rx_cpu_rmap); 1299874aeea5SJeff Kirsher efx->net_dev->rx_cpu_rmap = NULL; 1300874aeea5SJeff Kirsher return rc; 1301874aeea5SJeff Kirsher } 1302874aeea5SJeff Kirsher } 1303874aeea5SJeff Kirsher #endif 1304874aeea5SJeff Kirsher return 0; 1305874aeea5SJeff Kirsher } 1306874aeea5SJeff Kirsher 1307874aeea5SJeff Kirsher /* Probe the number and type of interrupts we are able to obtain, and 1308874aeea5SJeff Kirsher * the resulting numbers of channels and RX queues. 1309874aeea5SJeff Kirsher */ 1310874aeea5SJeff Kirsher static int efx_probe_interrupts(struct efx_nic *efx) 1311874aeea5SJeff Kirsher { 1312a16e5b24SBen Hutchings unsigned int max_channels = 1313a16e5b24SBen Hutchings min(efx->type->phys_addr_channels, EFX_MAX_CHANNELS); 13147f967c01SBen Hutchings unsigned int extra_channels = 0; 13157f967c01SBen Hutchings unsigned int i, j; 1316a16e5b24SBen Hutchings int rc; 1317874aeea5SJeff Kirsher 13187f967c01SBen Hutchings for (i = 0; i < EFX_MAX_EXTRA_CHANNELS; i++) 13197f967c01SBen Hutchings if (efx->extra_channel_type[i]) 13207f967c01SBen Hutchings ++extra_channels; 13217f967c01SBen Hutchings 1322874aeea5SJeff Kirsher if (efx->interrupt_mode == EFX_INT_MODE_MSIX) { 1323874aeea5SJeff Kirsher struct msix_entry xentries[EFX_MAX_CHANNELS]; 1324a16e5b24SBen Hutchings unsigned int n_channels; 1325874aeea5SJeff Kirsher 1326a9a52506SBen Hutchings n_channels = efx_wanted_parallelism(efx); 1327874aeea5SJeff Kirsher if (separate_tx_channels) 1328874aeea5SJeff Kirsher n_channels *= 2; 13297f967c01SBen Hutchings n_channels += extra_channels; 1330874aeea5SJeff Kirsher n_channels = min(n_channels, max_channels); 1331874aeea5SJeff Kirsher 1332874aeea5SJeff Kirsher for (i = 0; i < n_channels; i++) 1333874aeea5SJeff Kirsher xentries[i].entry = i; 1334874aeea5SJeff Kirsher rc = pci_enable_msix(efx->pci_dev, xentries, n_channels); 1335874aeea5SJeff Kirsher if (rc > 0) { 1336874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, 1337874aeea5SJeff Kirsher "WARNING: Insufficient MSI-X vectors" 1338a16e5b24SBen Hutchings " available (%d < %u).\n", rc, n_channels); 1339874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, 1340874aeea5SJeff Kirsher "WARNING: Performance may be reduced.\n"); 1341874aeea5SJeff Kirsher EFX_BUG_ON_PARANOID(rc >= n_channels); 1342874aeea5SJeff Kirsher n_channels = rc; 1343874aeea5SJeff Kirsher rc = pci_enable_msix(efx->pci_dev, xentries, 1344874aeea5SJeff Kirsher n_channels); 1345874aeea5SJeff Kirsher } 1346874aeea5SJeff Kirsher 1347874aeea5SJeff Kirsher if (rc == 0) { 1348874aeea5SJeff Kirsher efx->n_channels = n_channels; 13497f967c01SBen Hutchings if (n_channels > extra_channels) 13507f967c01SBen Hutchings n_channels -= extra_channels; 1351874aeea5SJeff Kirsher if (separate_tx_channels) { 13527f967c01SBen Hutchings efx->n_tx_channels = max(n_channels / 2, 1U); 13537f967c01SBen Hutchings efx->n_rx_channels = max(n_channels - 13547f967c01SBen Hutchings efx->n_tx_channels, 13557f967c01SBen Hutchings 1U); 1356874aeea5SJeff Kirsher } else { 13577f967c01SBen Hutchings efx->n_tx_channels = n_channels; 13587f967c01SBen Hutchings efx->n_rx_channels = n_channels; 1359874aeea5SJeff Kirsher } 1360874aeea5SJeff Kirsher rc = efx_init_rx_cpu_rmap(efx, xentries); 1361874aeea5SJeff Kirsher if (rc) { 1362874aeea5SJeff Kirsher pci_disable_msix(efx->pci_dev); 1363874aeea5SJeff Kirsher return rc; 1364874aeea5SJeff Kirsher } 13657f967c01SBen Hutchings for (i = 0; i < efx->n_channels; i++) 1366874aeea5SJeff Kirsher efx_get_channel(efx, i)->irq = 1367874aeea5SJeff Kirsher xentries[i].vector; 1368874aeea5SJeff Kirsher } else { 1369874aeea5SJeff Kirsher /* Fall back to single channel MSI */ 1370874aeea5SJeff Kirsher efx->interrupt_mode = EFX_INT_MODE_MSI; 1371874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, 1372874aeea5SJeff Kirsher "could not enable MSI-X\n"); 1373874aeea5SJeff Kirsher } 1374874aeea5SJeff Kirsher } 1375874aeea5SJeff Kirsher 1376874aeea5SJeff Kirsher /* Try single interrupt MSI */ 1377874aeea5SJeff Kirsher if (efx->interrupt_mode == EFX_INT_MODE_MSI) { 1378874aeea5SJeff Kirsher efx->n_channels = 1; 1379874aeea5SJeff Kirsher efx->n_rx_channels = 1; 1380874aeea5SJeff Kirsher efx->n_tx_channels = 1; 1381874aeea5SJeff Kirsher rc = pci_enable_msi(efx->pci_dev); 1382874aeea5SJeff Kirsher if (rc == 0) { 1383874aeea5SJeff Kirsher efx_get_channel(efx, 0)->irq = efx->pci_dev->irq; 1384874aeea5SJeff Kirsher } else { 1385874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, 1386874aeea5SJeff Kirsher "could not enable MSI\n"); 1387874aeea5SJeff Kirsher efx->interrupt_mode = EFX_INT_MODE_LEGACY; 1388874aeea5SJeff Kirsher } 1389874aeea5SJeff Kirsher } 1390874aeea5SJeff Kirsher 1391874aeea5SJeff Kirsher /* Assume legacy interrupts */ 1392874aeea5SJeff Kirsher if (efx->interrupt_mode == EFX_INT_MODE_LEGACY) { 1393874aeea5SJeff Kirsher efx->n_channels = 1 + (separate_tx_channels ? 1 : 0); 1394874aeea5SJeff Kirsher efx->n_rx_channels = 1; 1395874aeea5SJeff Kirsher efx->n_tx_channels = 1; 1396874aeea5SJeff Kirsher efx->legacy_irq = efx->pci_dev->irq; 1397874aeea5SJeff Kirsher } 1398874aeea5SJeff Kirsher 13997f967c01SBen Hutchings /* Assign extra channels if possible */ 14007f967c01SBen Hutchings j = efx->n_channels; 14017f967c01SBen Hutchings for (i = 0; i < EFX_MAX_EXTRA_CHANNELS; i++) { 14027f967c01SBen Hutchings if (!efx->extra_channel_type[i]) 14037f967c01SBen Hutchings continue; 14047f967c01SBen Hutchings if (efx->interrupt_mode != EFX_INT_MODE_MSIX || 14057f967c01SBen Hutchings efx->n_channels <= extra_channels) { 14067f967c01SBen Hutchings efx->extra_channel_type[i]->handle_no_channel(efx); 14077f967c01SBen Hutchings } else { 14087f967c01SBen Hutchings --j; 14097f967c01SBen Hutchings efx_get_channel(efx, j)->type = 14107f967c01SBen Hutchings efx->extra_channel_type[i]; 14117f967c01SBen Hutchings } 14127f967c01SBen Hutchings } 14137f967c01SBen Hutchings 1414cd2d5b52SBen Hutchings /* RSS might be usable on VFs even if it is disabled on the PF */ 14153132d282SBen Hutchings efx->rss_spread = ((efx->n_rx_channels > 1 || !efx_sriov_wanted(efx)) ? 1416cd2d5b52SBen Hutchings efx->n_rx_channels : efx_vf_size(efx)); 1417cd2d5b52SBen Hutchings 1418874aeea5SJeff Kirsher return 0; 1419874aeea5SJeff Kirsher } 1420874aeea5SJeff Kirsher 14219f2cb71cSBen Hutchings /* Enable interrupts, then probe and start the event queues */ 14227f967c01SBen Hutchings static void efx_start_interrupts(struct efx_nic *efx, bool may_keep_eventq) 14239f2cb71cSBen Hutchings { 14249f2cb71cSBen Hutchings struct efx_channel *channel; 14259f2cb71cSBen Hutchings 14268b7325b4SBen Hutchings BUG_ON(efx->state == STATE_DISABLED); 14278b7325b4SBen Hutchings 14289f2cb71cSBen Hutchings if (efx->legacy_irq) 14299f2cb71cSBen Hutchings efx->legacy_irq_enabled = true; 14309f2cb71cSBen Hutchings efx_nic_enable_interrupts(efx); 14319f2cb71cSBen Hutchings 14329f2cb71cSBen Hutchings efx_for_each_channel(channel, efx) { 14337f967c01SBen Hutchings if (!channel->type->keep_eventq || !may_keep_eventq) 14349f2cb71cSBen Hutchings efx_init_eventq(channel); 14359f2cb71cSBen Hutchings efx_start_eventq(channel); 14369f2cb71cSBen Hutchings } 14379f2cb71cSBen Hutchings 14389f2cb71cSBen Hutchings efx_mcdi_mode_event(efx); 14399f2cb71cSBen Hutchings } 14409f2cb71cSBen Hutchings 14417f967c01SBen Hutchings static void efx_stop_interrupts(struct efx_nic *efx, bool may_keep_eventq) 14429f2cb71cSBen Hutchings { 14439f2cb71cSBen Hutchings struct efx_channel *channel; 14449f2cb71cSBen Hutchings 14458b7325b4SBen Hutchings if (efx->state == STATE_DISABLED) 14468b7325b4SBen Hutchings return; 14478b7325b4SBen Hutchings 14489f2cb71cSBen Hutchings efx_mcdi_mode_poll(efx); 14499f2cb71cSBen Hutchings 14509f2cb71cSBen Hutchings efx_nic_disable_interrupts(efx); 14519f2cb71cSBen Hutchings if (efx->legacy_irq) { 14529f2cb71cSBen Hutchings synchronize_irq(efx->legacy_irq); 14539f2cb71cSBen Hutchings efx->legacy_irq_enabled = false; 14549f2cb71cSBen Hutchings } 14559f2cb71cSBen Hutchings 14569f2cb71cSBen Hutchings efx_for_each_channel(channel, efx) { 14579f2cb71cSBen Hutchings if (channel->irq) 14589f2cb71cSBen Hutchings synchronize_irq(channel->irq); 14599f2cb71cSBen Hutchings 14609f2cb71cSBen Hutchings efx_stop_eventq(channel); 14617f967c01SBen Hutchings if (!channel->type->keep_eventq || !may_keep_eventq) 14629f2cb71cSBen Hutchings efx_fini_eventq(channel); 14639f2cb71cSBen Hutchings } 14649f2cb71cSBen Hutchings } 14659f2cb71cSBen Hutchings 1466874aeea5SJeff Kirsher static void efx_remove_interrupts(struct efx_nic *efx) 1467874aeea5SJeff Kirsher { 1468874aeea5SJeff Kirsher struct efx_channel *channel; 1469874aeea5SJeff Kirsher 1470874aeea5SJeff Kirsher /* Remove MSI/MSI-X interrupts */ 1471874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) 1472874aeea5SJeff Kirsher channel->irq = 0; 1473874aeea5SJeff Kirsher pci_disable_msi(efx->pci_dev); 1474874aeea5SJeff Kirsher pci_disable_msix(efx->pci_dev); 1475874aeea5SJeff Kirsher 1476874aeea5SJeff Kirsher /* Remove legacy interrupt */ 1477874aeea5SJeff Kirsher efx->legacy_irq = 0; 1478874aeea5SJeff Kirsher } 1479874aeea5SJeff Kirsher 1480874aeea5SJeff Kirsher static void efx_set_channels(struct efx_nic *efx) 1481874aeea5SJeff Kirsher { 1482874aeea5SJeff Kirsher struct efx_channel *channel; 1483874aeea5SJeff Kirsher struct efx_tx_queue *tx_queue; 1484874aeea5SJeff Kirsher 1485874aeea5SJeff Kirsher efx->tx_channel_offset = 1486874aeea5SJeff Kirsher separate_tx_channels ? efx->n_channels - efx->n_tx_channels : 0; 1487874aeea5SJeff Kirsher 148879d68b37SStuart Hodgson /* We need to mark which channels really have RX and TX 148979d68b37SStuart Hodgson * queues, and adjust the TX queue numbers if we have separate 1490874aeea5SJeff Kirsher * RX-only and TX-only channels. 1491874aeea5SJeff Kirsher */ 1492874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) { 149379d68b37SStuart Hodgson if (channel->channel < efx->n_rx_channels) 149479d68b37SStuart Hodgson channel->rx_queue.core_index = channel->channel; 149579d68b37SStuart Hodgson else 149679d68b37SStuart Hodgson channel->rx_queue.core_index = -1; 149779d68b37SStuart Hodgson 1498874aeea5SJeff Kirsher efx_for_each_channel_tx_queue(tx_queue, channel) 1499874aeea5SJeff Kirsher tx_queue->queue -= (efx->tx_channel_offset * 1500874aeea5SJeff Kirsher EFX_TXQ_TYPES); 1501874aeea5SJeff Kirsher } 1502874aeea5SJeff Kirsher } 1503874aeea5SJeff Kirsher 1504874aeea5SJeff Kirsher static int efx_probe_nic(struct efx_nic *efx) 1505874aeea5SJeff Kirsher { 1506874aeea5SJeff Kirsher size_t i; 1507874aeea5SJeff Kirsher int rc; 1508874aeea5SJeff Kirsher 1509874aeea5SJeff Kirsher netif_dbg(efx, probe, efx->net_dev, "creating NIC\n"); 1510874aeea5SJeff Kirsher 1511874aeea5SJeff Kirsher /* Carry out hardware-type specific initialisation */ 1512874aeea5SJeff Kirsher rc = efx->type->probe(efx); 1513874aeea5SJeff Kirsher if (rc) 1514874aeea5SJeff Kirsher return rc; 1515874aeea5SJeff Kirsher 1516874aeea5SJeff Kirsher /* Determine the number of channels and queues by trying to hook 1517874aeea5SJeff Kirsher * in MSI-X interrupts. */ 1518874aeea5SJeff Kirsher rc = efx_probe_interrupts(efx); 1519874aeea5SJeff Kirsher if (rc) 1520874aeea5SJeff Kirsher goto fail; 1521874aeea5SJeff Kirsher 152228e47c49SBen Hutchings efx->type->dimension_resources(efx); 152328e47c49SBen Hutchings 1524874aeea5SJeff Kirsher if (efx->n_channels > 1) 1525874aeea5SJeff Kirsher get_random_bytes(&efx->rx_hash_key, sizeof(efx->rx_hash_key)); 1526874aeea5SJeff Kirsher for (i = 0; i < ARRAY_SIZE(efx->rx_indir_table); i++) 1527278bc429SBen Hutchings efx->rx_indir_table[i] = 1528cd2d5b52SBen Hutchings ethtool_rxfh_indir_default(i, efx->rss_spread); 1529874aeea5SJeff Kirsher 1530874aeea5SJeff Kirsher efx_set_channels(efx); 1531874aeea5SJeff Kirsher netif_set_real_num_tx_queues(efx->net_dev, efx->n_tx_channels); 1532874aeea5SJeff Kirsher netif_set_real_num_rx_queues(efx->net_dev, efx->n_rx_channels); 1533874aeea5SJeff Kirsher 1534874aeea5SJeff Kirsher /* Initialise the interrupt moderation settings */ 15359e393b30SBen Hutchings efx_init_irq_moderation(efx, tx_irq_mod_usec, rx_irq_mod_usec, true, 15369e393b30SBen Hutchings true); 1537874aeea5SJeff Kirsher 1538874aeea5SJeff Kirsher return 0; 1539874aeea5SJeff Kirsher 1540874aeea5SJeff Kirsher fail: 1541874aeea5SJeff Kirsher efx->type->remove(efx); 1542874aeea5SJeff Kirsher return rc; 1543874aeea5SJeff Kirsher } 1544874aeea5SJeff Kirsher 1545874aeea5SJeff Kirsher static void efx_remove_nic(struct efx_nic *efx) 1546874aeea5SJeff Kirsher { 1547874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "destroying NIC\n"); 1548874aeea5SJeff Kirsher 1549874aeea5SJeff Kirsher efx_remove_interrupts(efx); 1550874aeea5SJeff Kirsher efx->type->remove(efx); 1551874aeea5SJeff Kirsher } 1552874aeea5SJeff Kirsher 1553874aeea5SJeff Kirsher /************************************************************************** 1554874aeea5SJeff Kirsher * 1555874aeea5SJeff Kirsher * NIC startup/shutdown 1556874aeea5SJeff Kirsher * 1557874aeea5SJeff Kirsher *************************************************************************/ 1558874aeea5SJeff Kirsher 1559874aeea5SJeff Kirsher static int efx_probe_all(struct efx_nic *efx) 1560874aeea5SJeff Kirsher { 1561874aeea5SJeff Kirsher int rc; 1562874aeea5SJeff Kirsher 1563874aeea5SJeff Kirsher rc = efx_probe_nic(efx); 1564874aeea5SJeff Kirsher if (rc) { 1565874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, "failed to create NIC\n"); 1566874aeea5SJeff Kirsher goto fail1; 1567874aeea5SJeff Kirsher } 1568874aeea5SJeff Kirsher 1569874aeea5SJeff Kirsher rc = efx_probe_port(efx); 1570874aeea5SJeff Kirsher if (rc) { 1571874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, "failed to create port\n"); 1572874aeea5SJeff Kirsher goto fail2; 1573874aeea5SJeff Kirsher } 1574874aeea5SJeff Kirsher 15757e6d06f0SBen Hutchings BUILD_BUG_ON(EFX_DEFAULT_DMAQ_SIZE < EFX_RXQ_MIN_ENT); 15767e6d06f0SBen Hutchings if (WARN_ON(EFX_DEFAULT_DMAQ_SIZE < EFX_TXQ_MIN_ENT(efx))) { 15777e6d06f0SBen Hutchings rc = -EINVAL; 15787e6d06f0SBen Hutchings goto fail3; 15797e6d06f0SBen Hutchings } 1580874aeea5SJeff Kirsher efx->rxq_entries = efx->txq_entries = EFX_DEFAULT_DMAQ_SIZE; 1581874aeea5SJeff Kirsher 1582874aeea5SJeff Kirsher rc = efx_probe_filters(efx); 1583874aeea5SJeff Kirsher if (rc) { 1584874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 1585874aeea5SJeff Kirsher "failed to create filter tables\n"); 15867f967c01SBen Hutchings goto fail3; 1587874aeea5SJeff Kirsher } 1588874aeea5SJeff Kirsher 15897f967c01SBen Hutchings rc = efx_probe_channels(efx); 15907f967c01SBen Hutchings if (rc) 15917f967c01SBen Hutchings goto fail4; 15927f967c01SBen Hutchings 1593874aeea5SJeff Kirsher return 0; 1594874aeea5SJeff Kirsher 1595874aeea5SJeff Kirsher fail4: 15967f967c01SBen Hutchings efx_remove_filters(efx); 1597874aeea5SJeff Kirsher fail3: 1598874aeea5SJeff Kirsher efx_remove_port(efx); 1599874aeea5SJeff Kirsher fail2: 1600874aeea5SJeff Kirsher efx_remove_nic(efx); 1601874aeea5SJeff Kirsher fail1: 1602874aeea5SJeff Kirsher return rc; 1603874aeea5SJeff Kirsher } 1604874aeea5SJeff Kirsher 16058b7325b4SBen Hutchings /* If the interface is supposed to be running but is not, start 16068b7325b4SBen Hutchings * the hardware and software data path, regular activity for the port 16078b7325b4SBen Hutchings * (MAC statistics, link polling, etc.) and schedule the port to be 16088b7325b4SBen Hutchings * reconfigured. Interrupts must already be enabled. This function 16098b7325b4SBen Hutchings * is safe to call multiple times, so long as the NIC is not disabled. 16108b7325b4SBen Hutchings * Requires the RTNL lock. 16119f2cb71cSBen Hutchings */ 1612874aeea5SJeff Kirsher static void efx_start_all(struct efx_nic *efx) 1613874aeea5SJeff Kirsher { 1614874aeea5SJeff Kirsher EFX_ASSERT_RESET_SERIALISED(efx); 16158b7325b4SBen Hutchings BUG_ON(efx->state == STATE_DISABLED); 1616874aeea5SJeff Kirsher 1617874aeea5SJeff Kirsher /* Check that it is appropriate to restart the interface. All 1618874aeea5SJeff Kirsher * of these flags are safe to read under just the rtnl lock */ 16198b7325b4SBen Hutchings if (efx->port_enabled || !netif_running(efx->net_dev)) 1620874aeea5SJeff Kirsher return; 1621874aeea5SJeff Kirsher 1622874aeea5SJeff Kirsher efx_start_port(efx); 16239f2cb71cSBen Hutchings efx_start_datapath(efx); 1624874aeea5SJeff Kirsher 1625626950dbSAlexandre Rames /* Start the hardware monitor if there is one */ 1626626950dbSAlexandre Rames if (efx->type->monitor != NULL) 1627874aeea5SJeff Kirsher queue_delayed_work(efx->workqueue, &efx->monitor_work, 1628874aeea5SJeff Kirsher efx_monitor_interval); 1629626950dbSAlexandre Rames 1630626950dbSAlexandre Rames /* If link state detection is normally event-driven, we have 1631626950dbSAlexandre Rames * to poll now because we could have missed a change 1632626950dbSAlexandre Rames */ 1633626950dbSAlexandre Rames if (efx_nic_rev(efx) >= EFX_REV_SIENA_A0) { 1634874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 1635874aeea5SJeff Kirsher if (efx->phy_op->poll(efx)) 1636874aeea5SJeff Kirsher efx_link_status_changed(efx); 1637874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 1638874aeea5SJeff Kirsher } 1639874aeea5SJeff Kirsher 1640874aeea5SJeff Kirsher efx->type->start_stats(efx); 1641874aeea5SJeff Kirsher } 1642874aeea5SJeff Kirsher 1643874aeea5SJeff Kirsher /* Flush all delayed work. Should only be called when no more delayed work 1644874aeea5SJeff Kirsher * will be scheduled. This doesn't flush pending online resets (efx_reset), 1645874aeea5SJeff Kirsher * since we're holding the rtnl_lock at this point. */ 1646874aeea5SJeff Kirsher static void efx_flush_all(struct efx_nic *efx) 1647874aeea5SJeff Kirsher { 1648dd40781eSBen Hutchings /* Make sure the hardware monitor and event self-test are stopped */ 1649874aeea5SJeff Kirsher cancel_delayed_work_sync(&efx->monitor_work); 1650dd40781eSBen Hutchings efx_selftest_async_cancel(efx); 1651874aeea5SJeff Kirsher /* Stop scheduled port reconfigurations */ 1652874aeea5SJeff Kirsher cancel_work_sync(&efx->mac_work); 1653874aeea5SJeff Kirsher } 1654874aeea5SJeff Kirsher 16558b7325b4SBen Hutchings /* Quiesce the hardware and software data path, and regular activity 16568b7325b4SBen Hutchings * for the port without bringing the link down. Safe to call multiple 16578b7325b4SBen Hutchings * times with the NIC in almost any state, but interrupts should be 16588b7325b4SBen Hutchings * enabled. Requires the RTNL lock. 16598b7325b4SBen Hutchings */ 1660874aeea5SJeff Kirsher static void efx_stop_all(struct efx_nic *efx) 1661874aeea5SJeff Kirsher { 1662874aeea5SJeff Kirsher EFX_ASSERT_RESET_SERIALISED(efx); 1663874aeea5SJeff Kirsher 1664874aeea5SJeff Kirsher /* port_enabled can be read safely under the rtnl lock */ 1665874aeea5SJeff Kirsher if (!efx->port_enabled) 1666874aeea5SJeff Kirsher return; 1667874aeea5SJeff Kirsher 1668874aeea5SJeff Kirsher efx->type->stop_stats(efx); 1669874aeea5SJeff Kirsher efx_stop_port(efx); 1670874aeea5SJeff Kirsher 1671874aeea5SJeff Kirsher /* Flush efx_mac_work(), refill_workqueue, monitor_work */ 1672874aeea5SJeff Kirsher efx_flush_all(efx); 1673874aeea5SJeff Kirsher 167429c69a48SBen Hutchings /* Stop the kernel transmit interface. This is only valid if 167529c69a48SBen Hutchings * the device is stopped or detached; otherwise the watchdog 167629c69a48SBen Hutchings * may fire immediately. 167729c69a48SBen Hutchings */ 167829c69a48SBen Hutchings WARN_ON(netif_running(efx->net_dev) && 167929c69a48SBen Hutchings netif_device_present(efx->net_dev)); 16809f2cb71cSBen Hutchings netif_tx_disable(efx->net_dev); 16819f2cb71cSBen Hutchings 16829f2cb71cSBen Hutchings efx_stop_datapath(efx); 1683874aeea5SJeff Kirsher } 1684874aeea5SJeff Kirsher 1685874aeea5SJeff Kirsher static void efx_remove_all(struct efx_nic *efx) 1686874aeea5SJeff Kirsher { 1687874aeea5SJeff Kirsher efx_remove_channels(efx); 16887f967c01SBen Hutchings efx_remove_filters(efx); 1689874aeea5SJeff Kirsher efx_remove_port(efx); 1690874aeea5SJeff Kirsher efx_remove_nic(efx); 1691874aeea5SJeff Kirsher } 1692874aeea5SJeff Kirsher 1693874aeea5SJeff Kirsher /************************************************************************** 1694874aeea5SJeff Kirsher * 1695874aeea5SJeff Kirsher * Interrupt moderation 1696874aeea5SJeff Kirsher * 1697874aeea5SJeff Kirsher **************************************************************************/ 1698874aeea5SJeff Kirsher 1699cc180b69SBen Hutchings static unsigned int irq_mod_ticks(unsigned int usecs, unsigned int quantum_ns) 1700874aeea5SJeff Kirsher { 1701b548f976SBen Hutchings if (usecs == 0) 1702b548f976SBen Hutchings return 0; 1703cc180b69SBen Hutchings if (usecs * 1000 < quantum_ns) 1704874aeea5SJeff Kirsher return 1; /* never round down to 0 */ 1705cc180b69SBen Hutchings return usecs * 1000 / quantum_ns; 1706874aeea5SJeff Kirsher } 1707874aeea5SJeff Kirsher 1708874aeea5SJeff Kirsher /* Set interrupt moderation parameters */ 17099e393b30SBen Hutchings int efx_init_irq_moderation(struct efx_nic *efx, unsigned int tx_usecs, 17109e393b30SBen Hutchings unsigned int rx_usecs, bool rx_adaptive, 17119e393b30SBen Hutchings bool rx_may_override_tx) 1712874aeea5SJeff Kirsher { 1713874aeea5SJeff Kirsher struct efx_channel *channel; 1714cc180b69SBen Hutchings unsigned int irq_mod_max = DIV_ROUND_UP(efx->type->timer_period_max * 1715cc180b69SBen Hutchings efx->timer_quantum_ns, 1716cc180b69SBen Hutchings 1000); 1717cc180b69SBen Hutchings unsigned int tx_ticks; 1718cc180b69SBen Hutchings unsigned int rx_ticks; 1719874aeea5SJeff Kirsher 1720874aeea5SJeff Kirsher EFX_ASSERT_RESET_SERIALISED(efx); 1721874aeea5SJeff Kirsher 1722cc180b69SBen Hutchings if (tx_usecs > irq_mod_max || rx_usecs > irq_mod_max) 17239e393b30SBen Hutchings return -EINVAL; 17249e393b30SBen Hutchings 1725cc180b69SBen Hutchings tx_ticks = irq_mod_ticks(tx_usecs, efx->timer_quantum_ns); 1726cc180b69SBen Hutchings rx_ticks = irq_mod_ticks(rx_usecs, efx->timer_quantum_ns); 1727cc180b69SBen Hutchings 17289e393b30SBen Hutchings if (tx_ticks != rx_ticks && efx->tx_channel_offset == 0 && 17299e393b30SBen Hutchings !rx_may_override_tx) { 17309e393b30SBen Hutchings netif_err(efx, drv, efx->net_dev, "Channels are shared. " 17319e393b30SBen Hutchings "RX and TX IRQ moderation must be equal\n"); 17329e393b30SBen Hutchings return -EINVAL; 17339e393b30SBen Hutchings } 17349e393b30SBen Hutchings 1735874aeea5SJeff Kirsher efx->irq_rx_adaptive = rx_adaptive; 1736874aeea5SJeff Kirsher efx->irq_rx_moderation = rx_ticks; 1737874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) { 1738874aeea5SJeff Kirsher if (efx_channel_has_rx_queue(channel)) 1739874aeea5SJeff Kirsher channel->irq_moderation = rx_ticks; 1740874aeea5SJeff Kirsher else if (efx_channel_has_tx_queues(channel)) 1741874aeea5SJeff Kirsher channel->irq_moderation = tx_ticks; 1742874aeea5SJeff Kirsher } 17439e393b30SBen Hutchings 17449e393b30SBen Hutchings return 0; 1745874aeea5SJeff Kirsher } 1746874aeea5SJeff Kirsher 1747a0c4faf5SBen Hutchings void efx_get_irq_moderation(struct efx_nic *efx, unsigned int *tx_usecs, 1748a0c4faf5SBen Hutchings unsigned int *rx_usecs, bool *rx_adaptive) 1749a0c4faf5SBen Hutchings { 1750cc180b69SBen Hutchings /* We must round up when converting ticks to microseconds 1751cc180b69SBen Hutchings * because we round down when converting the other way. 1752cc180b69SBen Hutchings */ 1753cc180b69SBen Hutchings 1754a0c4faf5SBen Hutchings *rx_adaptive = efx->irq_rx_adaptive; 1755cc180b69SBen Hutchings *rx_usecs = DIV_ROUND_UP(efx->irq_rx_moderation * 1756cc180b69SBen Hutchings efx->timer_quantum_ns, 1757cc180b69SBen Hutchings 1000); 1758a0c4faf5SBen Hutchings 1759a0c4faf5SBen Hutchings /* If channels are shared between RX and TX, so is IRQ 1760a0c4faf5SBen Hutchings * moderation. Otherwise, IRQ moderation is the same for all 1761a0c4faf5SBen Hutchings * TX channels and is not adaptive. 1762a0c4faf5SBen Hutchings */ 1763a0c4faf5SBen Hutchings if (efx->tx_channel_offset == 0) 1764a0c4faf5SBen Hutchings *tx_usecs = *rx_usecs; 1765a0c4faf5SBen Hutchings else 1766cc180b69SBen Hutchings *tx_usecs = DIV_ROUND_UP( 1767a0c4faf5SBen Hutchings efx->channel[efx->tx_channel_offset]->irq_moderation * 1768cc180b69SBen Hutchings efx->timer_quantum_ns, 1769cc180b69SBen Hutchings 1000); 1770a0c4faf5SBen Hutchings } 1771a0c4faf5SBen Hutchings 1772874aeea5SJeff Kirsher /************************************************************************** 1773874aeea5SJeff Kirsher * 1774874aeea5SJeff Kirsher * Hardware monitor 1775874aeea5SJeff Kirsher * 1776874aeea5SJeff Kirsher **************************************************************************/ 1777874aeea5SJeff Kirsher 1778874aeea5SJeff Kirsher /* Run periodically off the general workqueue */ 1779874aeea5SJeff Kirsher static void efx_monitor(struct work_struct *data) 1780874aeea5SJeff Kirsher { 1781874aeea5SJeff Kirsher struct efx_nic *efx = container_of(data, struct efx_nic, 1782874aeea5SJeff Kirsher monitor_work.work); 1783874aeea5SJeff Kirsher 1784874aeea5SJeff Kirsher netif_vdbg(efx, timer, efx->net_dev, 1785874aeea5SJeff Kirsher "hardware monitor executing on CPU %d\n", 1786874aeea5SJeff Kirsher raw_smp_processor_id()); 1787874aeea5SJeff Kirsher BUG_ON(efx->type->monitor == NULL); 1788874aeea5SJeff Kirsher 1789874aeea5SJeff Kirsher /* If the mac_lock is already held then it is likely a port 1790874aeea5SJeff Kirsher * reconfiguration is already in place, which will likely do 1791874aeea5SJeff Kirsher * most of the work of monitor() anyway. */ 1792874aeea5SJeff Kirsher if (mutex_trylock(&efx->mac_lock)) { 1793874aeea5SJeff Kirsher if (efx->port_enabled) 1794874aeea5SJeff Kirsher efx->type->monitor(efx); 1795874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 1796874aeea5SJeff Kirsher } 1797874aeea5SJeff Kirsher 1798874aeea5SJeff Kirsher queue_delayed_work(efx->workqueue, &efx->monitor_work, 1799874aeea5SJeff Kirsher efx_monitor_interval); 1800874aeea5SJeff Kirsher } 1801874aeea5SJeff Kirsher 1802874aeea5SJeff Kirsher /************************************************************************** 1803874aeea5SJeff Kirsher * 1804874aeea5SJeff Kirsher * ioctls 1805874aeea5SJeff Kirsher * 1806874aeea5SJeff Kirsher *************************************************************************/ 1807874aeea5SJeff Kirsher 1808874aeea5SJeff Kirsher /* Net device ioctl 1809874aeea5SJeff Kirsher * Context: process, rtnl_lock() held. 1810874aeea5SJeff Kirsher */ 1811874aeea5SJeff Kirsher static int efx_ioctl(struct net_device *net_dev, struct ifreq *ifr, int cmd) 1812874aeea5SJeff Kirsher { 1813874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 1814874aeea5SJeff Kirsher struct mii_ioctl_data *data = if_mii(ifr); 1815874aeea5SJeff Kirsher 18167c236c43SStuart Hodgson if (cmd == SIOCSHWTSTAMP) 18177c236c43SStuart Hodgson return efx_ptp_ioctl(efx, ifr, cmd); 18187c236c43SStuart Hodgson 1819874aeea5SJeff Kirsher /* Convert phy_id from older PRTAD/DEVAD format */ 1820874aeea5SJeff Kirsher if ((cmd == SIOCGMIIREG || cmd == SIOCSMIIREG) && 1821874aeea5SJeff Kirsher (data->phy_id & 0xfc00) == 0x0400) 1822874aeea5SJeff Kirsher data->phy_id ^= MDIO_PHY_ID_C45 | 0x0400; 1823874aeea5SJeff Kirsher 1824874aeea5SJeff Kirsher return mdio_mii_ioctl(&efx->mdio, data, cmd); 1825874aeea5SJeff Kirsher } 1826874aeea5SJeff Kirsher 1827874aeea5SJeff Kirsher /************************************************************************** 1828874aeea5SJeff Kirsher * 1829874aeea5SJeff Kirsher * NAPI interface 1830874aeea5SJeff Kirsher * 1831874aeea5SJeff Kirsher **************************************************************************/ 1832874aeea5SJeff Kirsher 18337f967c01SBen Hutchings static void efx_init_napi_channel(struct efx_channel *channel) 1834874aeea5SJeff Kirsher { 18357f967c01SBen Hutchings struct efx_nic *efx = channel->efx; 1836874aeea5SJeff Kirsher 1837874aeea5SJeff Kirsher channel->napi_dev = efx->net_dev; 1838874aeea5SJeff Kirsher netif_napi_add(channel->napi_dev, &channel->napi_str, 1839874aeea5SJeff Kirsher efx_poll, napi_weight); 1840874aeea5SJeff Kirsher } 18417f967c01SBen Hutchings 18427f967c01SBen Hutchings static void efx_init_napi(struct efx_nic *efx) 18437f967c01SBen Hutchings { 18447f967c01SBen Hutchings struct efx_channel *channel; 18457f967c01SBen Hutchings 18467f967c01SBen Hutchings efx_for_each_channel(channel, efx) 18477f967c01SBen Hutchings efx_init_napi_channel(channel); 1848874aeea5SJeff Kirsher } 1849874aeea5SJeff Kirsher 1850874aeea5SJeff Kirsher static void efx_fini_napi_channel(struct efx_channel *channel) 1851874aeea5SJeff Kirsher { 1852874aeea5SJeff Kirsher if (channel->napi_dev) 1853874aeea5SJeff Kirsher netif_napi_del(&channel->napi_str); 1854874aeea5SJeff Kirsher channel->napi_dev = NULL; 1855874aeea5SJeff Kirsher } 1856874aeea5SJeff Kirsher 1857874aeea5SJeff Kirsher static void efx_fini_napi(struct efx_nic *efx) 1858874aeea5SJeff Kirsher { 1859874aeea5SJeff Kirsher struct efx_channel *channel; 1860874aeea5SJeff Kirsher 1861874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) 1862874aeea5SJeff Kirsher efx_fini_napi_channel(channel); 1863874aeea5SJeff Kirsher } 1864874aeea5SJeff Kirsher 1865874aeea5SJeff Kirsher /************************************************************************** 1866874aeea5SJeff Kirsher * 1867874aeea5SJeff Kirsher * Kernel netpoll interface 1868874aeea5SJeff Kirsher * 1869874aeea5SJeff Kirsher *************************************************************************/ 1870874aeea5SJeff Kirsher 1871874aeea5SJeff Kirsher #ifdef CONFIG_NET_POLL_CONTROLLER 1872874aeea5SJeff Kirsher 1873874aeea5SJeff Kirsher /* Although in the common case interrupts will be disabled, this is not 1874874aeea5SJeff Kirsher * guaranteed. However, all our work happens inside the NAPI callback, 1875874aeea5SJeff Kirsher * so no locking is required. 1876874aeea5SJeff Kirsher */ 1877874aeea5SJeff Kirsher static void efx_netpoll(struct net_device *net_dev) 1878874aeea5SJeff Kirsher { 1879874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 1880874aeea5SJeff Kirsher struct efx_channel *channel; 1881874aeea5SJeff Kirsher 1882874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) 1883874aeea5SJeff Kirsher efx_schedule_channel(channel); 1884874aeea5SJeff Kirsher } 1885874aeea5SJeff Kirsher 1886874aeea5SJeff Kirsher #endif 1887874aeea5SJeff Kirsher 1888874aeea5SJeff Kirsher /************************************************************************** 1889874aeea5SJeff Kirsher * 1890874aeea5SJeff Kirsher * Kernel net device interface 1891874aeea5SJeff Kirsher * 1892874aeea5SJeff Kirsher *************************************************************************/ 1893874aeea5SJeff Kirsher 1894874aeea5SJeff Kirsher /* Context: process, rtnl_lock() held. */ 1895874aeea5SJeff Kirsher static int efx_net_open(struct net_device *net_dev) 1896874aeea5SJeff Kirsher { 1897874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 18988b7325b4SBen Hutchings int rc; 18998b7325b4SBen Hutchings 1900874aeea5SJeff Kirsher netif_dbg(efx, ifup, efx->net_dev, "opening device on CPU %d\n", 1901874aeea5SJeff Kirsher raw_smp_processor_id()); 1902874aeea5SJeff Kirsher 19038b7325b4SBen Hutchings rc = efx_check_disabled(efx); 19048b7325b4SBen Hutchings if (rc) 19058b7325b4SBen Hutchings return rc; 1906874aeea5SJeff Kirsher if (efx->phy_mode & PHY_MODE_SPECIAL) 1907874aeea5SJeff Kirsher return -EBUSY; 1908874aeea5SJeff Kirsher if (efx_mcdi_poll_reboot(efx) && efx_reset(efx, RESET_TYPE_ALL)) 1909874aeea5SJeff Kirsher return -EIO; 1910874aeea5SJeff Kirsher 1911874aeea5SJeff Kirsher /* Notify the kernel of the link state polled during driver load, 1912874aeea5SJeff Kirsher * before the monitor starts running */ 1913874aeea5SJeff Kirsher efx_link_status_changed(efx); 1914874aeea5SJeff Kirsher 1915874aeea5SJeff Kirsher efx_start_all(efx); 1916dd40781eSBen Hutchings efx_selftest_async_start(efx); 1917874aeea5SJeff Kirsher return 0; 1918874aeea5SJeff Kirsher } 1919874aeea5SJeff Kirsher 1920874aeea5SJeff Kirsher /* Context: process, rtnl_lock() held. 1921874aeea5SJeff Kirsher * Note that the kernel will ignore our return code; this method 1922874aeea5SJeff Kirsher * should really be a void. 1923874aeea5SJeff Kirsher */ 1924874aeea5SJeff Kirsher static int efx_net_stop(struct net_device *net_dev) 1925874aeea5SJeff Kirsher { 1926874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 1927874aeea5SJeff Kirsher 1928874aeea5SJeff Kirsher netif_dbg(efx, ifdown, efx->net_dev, "closing on CPU %d\n", 1929874aeea5SJeff Kirsher raw_smp_processor_id()); 1930874aeea5SJeff Kirsher 1931874aeea5SJeff Kirsher /* Stop the device and flush all the channels */ 1932874aeea5SJeff Kirsher efx_stop_all(efx); 1933874aeea5SJeff Kirsher 1934874aeea5SJeff Kirsher return 0; 1935874aeea5SJeff Kirsher } 1936874aeea5SJeff Kirsher 1937874aeea5SJeff Kirsher /* Context: process, dev_base_lock or RTNL held, non-blocking. */ 19382aa9ef11SBen Hutchings static struct rtnl_link_stats64 *efx_net_stats(struct net_device *net_dev, 19392aa9ef11SBen Hutchings struct rtnl_link_stats64 *stats) 1940874aeea5SJeff Kirsher { 1941874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 1942874aeea5SJeff Kirsher struct efx_mac_stats *mac_stats = &efx->mac_stats; 1943874aeea5SJeff Kirsher 1944874aeea5SJeff Kirsher spin_lock_bh(&efx->stats_lock); 19451cb34522SBen Hutchings 1946874aeea5SJeff Kirsher efx->type->update_stats(efx); 1947874aeea5SJeff Kirsher 1948874aeea5SJeff Kirsher stats->rx_packets = mac_stats->rx_packets; 1949874aeea5SJeff Kirsher stats->tx_packets = mac_stats->tx_packets; 1950874aeea5SJeff Kirsher stats->rx_bytes = mac_stats->rx_bytes; 1951874aeea5SJeff Kirsher stats->tx_bytes = mac_stats->tx_bytes; 1952874aeea5SJeff Kirsher stats->rx_dropped = efx->n_rx_nodesc_drop_cnt; 1953874aeea5SJeff Kirsher stats->multicast = mac_stats->rx_multicast; 1954874aeea5SJeff Kirsher stats->collisions = mac_stats->tx_collision; 1955874aeea5SJeff Kirsher stats->rx_length_errors = (mac_stats->rx_gtjumbo + 1956874aeea5SJeff Kirsher mac_stats->rx_length_error); 1957874aeea5SJeff Kirsher stats->rx_crc_errors = mac_stats->rx_bad; 1958874aeea5SJeff Kirsher stats->rx_frame_errors = mac_stats->rx_align_error; 1959874aeea5SJeff Kirsher stats->rx_fifo_errors = mac_stats->rx_overflow; 1960874aeea5SJeff Kirsher stats->rx_missed_errors = mac_stats->rx_missed; 1961874aeea5SJeff Kirsher stats->tx_window_errors = mac_stats->tx_late_collision; 1962874aeea5SJeff Kirsher 1963874aeea5SJeff Kirsher stats->rx_errors = (stats->rx_length_errors + 1964874aeea5SJeff Kirsher stats->rx_crc_errors + 1965874aeea5SJeff Kirsher stats->rx_frame_errors + 1966874aeea5SJeff Kirsher mac_stats->rx_symbol_error); 1967874aeea5SJeff Kirsher stats->tx_errors = (stats->tx_window_errors + 1968874aeea5SJeff Kirsher mac_stats->tx_bad); 1969874aeea5SJeff Kirsher 19701cb34522SBen Hutchings spin_unlock_bh(&efx->stats_lock); 19711cb34522SBen Hutchings 1972874aeea5SJeff Kirsher return stats; 1973874aeea5SJeff Kirsher } 1974874aeea5SJeff Kirsher 1975874aeea5SJeff Kirsher /* Context: netif_tx_lock held, BHs disabled. */ 1976874aeea5SJeff Kirsher static void efx_watchdog(struct net_device *net_dev) 1977874aeea5SJeff Kirsher { 1978874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 1979874aeea5SJeff Kirsher 1980874aeea5SJeff Kirsher netif_err(efx, tx_err, efx->net_dev, 1981874aeea5SJeff Kirsher "TX stuck with port_enabled=%d: resetting channels\n", 1982874aeea5SJeff Kirsher efx->port_enabled); 1983874aeea5SJeff Kirsher 1984874aeea5SJeff Kirsher efx_schedule_reset(efx, RESET_TYPE_TX_WATCHDOG); 1985874aeea5SJeff Kirsher } 1986874aeea5SJeff Kirsher 1987874aeea5SJeff Kirsher 1988874aeea5SJeff Kirsher /* Context: process, rtnl_lock() held. */ 1989874aeea5SJeff Kirsher static int efx_change_mtu(struct net_device *net_dev, int new_mtu) 1990874aeea5SJeff Kirsher { 1991874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 19928b7325b4SBen Hutchings int rc; 1993874aeea5SJeff Kirsher 19948b7325b4SBen Hutchings rc = efx_check_disabled(efx); 19958b7325b4SBen Hutchings if (rc) 19968b7325b4SBen Hutchings return rc; 1997874aeea5SJeff Kirsher if (new_mtu > EFX_MAX_MTU) 1998874aeea5SJeff Kirsher return -EINVAL; 1999874aeea5SJeff Kirsher 2000874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "changing MTU to %d\n", new_mtu); 2001874aeea5SJeff Kirsher 200229c69a48SBen Hutchings efx_device_detach_sync(efx); 200329c69a48SBen Hutchings efx_stop_all(efx); 200429c69a48SBen Hutchings 2005874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 2006874aeea5SJeff Kirsher net_dev->mtu = new_mtu; 2007710b208dSBen Hutchings efx->type->reconfigure_mac(efx); 2008874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 2009874aeea5SJeff Kirsher 2010874aeea5SJeff Kirsher efx_start_all(efx); 201129c69a48SBen Hutchings netif_device_attach(efx->net_dev); 20126c8eef4aSBen Hutchings return 0; 2013874aeea5SJeff Kirsher } 2014874aeea5SJeff Kirsher 2015874aeea5SJeff Kirsher static int efx_set_mac_address(struct net_device *net_dev, void *data) 2016874aeea5SJeff Kirsher { 2017874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 2018874aeea5SJeff Kirsher struct sockaddr *addr = data; 2019874aeea5SJeff Kirsher char *new_addr = addr->sa_data; 2020874aeea5SJeff Kirsher 2021874aeea5SJeff Kirsher if (!is_valid_ether_addr(new_addr)) { 2022874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, 2023874aeea5SJeff Kirsher "invalid ethernet MAC address requested: %pM\n", 2024874aeea5SJeff Kirsher new_addr); 2025504f9b5aSDanny Kukawka return -EADDRNOTAVAIL; 2026874aeea5SJeff Kirsher } 2027874aeea5SJeff Kirsher 2028874aeea5SJeff Kirsher memcpy(net_dev->dev_addr, new_addr, net_dev->addr_len); 2029cd2d5b52SBen Hutchings efx_sriov_mac_address_changed(efx); 2030874aeea5SJeff Kirsher 2031874aeea5SJeff Kirsher /* Reconfigure the MAC */ 2032874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 2033710b208dSBen Hutchings efx->type->reconfigure_mac(efx); 2034874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 2035874aeea5SJeff Kirsher 2036874aeea5SJeff Kirsher return 0; 2037874aeea5SJeff Kirsher } 2038874aeea5SJeff Kirsher 2039874aeea5SJeff Kirsher /* Context: netif_addr_lock held, BHs disabled. */ 20400fca8c97SBen Hutchings static void efx_set_rx_mode(struct net_device *net_dev) 2041874aeea5SJeff Kirsher { 2042874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 2043874aeea5SJeff Kirsher struct netdev_hw_addr *ha; 2044874aeea5SJeff Kirsher union efx_multicast_hash *mc_hash = &efx->multicast_hash; 2045874aeea5SJeff Kirsher u32 crc; 2046874aeea5SJeff Kirsher int bit; 2047874aeea5SJeff Kirsher 2048874aeea5SJeff Kirsher efx->promiscuous = !!(net_dev->flags & IFF_PROMISC); 2049874aeea5SJeff Kirsher 2050874aeea5SJeff Kirsher /* Build multicast hash table */ 2051874aeea5SJeff Kirsher if (efx->promiscuous || (net_dev->flags & IFF_ALLMULTI)) { 2052874aeea5SJeff Kirsher memset(mc_hash, 0xff, sizeof(*mc_hash)); 2053874aeea5SJeff Kirsher } else { 2054874aeea5SJeff Kirsher memset(mc_hash, 0x00, sizeof(*mc_hash)); 2055874aeea5SJeff Kirsher netdev_for_each_mc_addr(ha, net_dev) { 2056874aeea5SJeff Kirsher crc = ether_crc_le(ETH_ALEN, ha->addr); 2057874aeea5SJeff Kirsher bit = crc & (EFX_MCAST_HASH_ENTRIES - 1); 205832766ec8SBen Hutchings __set_bit_le(bit, mc_hash); 2059874aeea5SJeff Kirsher } 2060874aeea5SJeff Kirsher 2061874aeea5SJeff Kirsher /* Broadcast packets go through the multicast hash filter. 2062874aeea5SJeff Kirsher * ether_crc_le() of the broadcast address is 0xbe2612ff 2063874aeea5SJeff Kirsher * so we always add bit 0xff to the mask. 2064874aeea5SJeff Kirsher */ 206532766ec8SBen Hutchings __set_bit_le(0xff, mc_hash); 2066874aeea5SJeff Kirsher } 2067874aeea5SJeff Kirsher 2068874aeea5SJeff Kirsher if (efx->port_enabled) 2069874aeea5SJeff Kirsher queue_work(efx->workqueue, &efx->mac_work); 2070874aeea5SJeff Kirsher /* Otherwise efx_start_port() will do this */ 2071874aeea5SJeff Kirsher } 2072874aeea5SJeff Kirsher 2073c8f44affSMichał Mirosław static int efx_set_features(struct net_device *net_dev, netdev_features_t data) 2074874aeea5SJeff Kirsher { 2075874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 2076874aeea5SJeff Kirsher 2077874aeea5SJeff Kirsher /* If disabling RX n-tuple filtering, clear existing filters */ 2078874aeea5SJeff Kirsher if (net_dev->features & ~data & NETIF_F_NTUPLE) 2079874aeea5SJeff Kirsher efx_filter_clear_rx(efx, EFX_FILTER_PRI_MANUAL); 2080874aeea5SJeff Kirsher 2081874aeea5SJeff Kirsher return 0; 2082874aeea5SJeff Kirsher } 2083874aeea5SJeff Kirsher 2084874aeea5SJeff Kirsher static const struct net_device_ops efx_netdev_ops = { 2085874aeea5SJeff Kirsher .ndo_open = efx_net_open, 2086874aeea5SJeff Kirsher .ndo_stop = efx_net_stop, 2087874aeea5SJeff Kirsher .ndo_get_stats64 = efx_net_stats, 2088874aeea5SJeff Kirsher .ndo_tx_timeout = efx_watchdog, 2089874aeea5SJeff Kirsher .ndo_start_xmit = efx_hard_start_xmit, 2090874aeea5SJeff Kirsher .ndo_validate_addr = eth_validate_addr, 2091874aeea5SJeff Kirsher .ndo_do_ioctl = efx_ioctl, 2092874aeea5SJeff Kirsher .ndo_change_mtu = efx_change_mtu, 2093874aeea5SJeff Kirsher .ndo_set_mac_address = efx_set_mac_address, 20940fca8c97SBen Hutchings .ndo_set_rx_mode = efx_set_rx_mode, 2095874aeea5SJeff Kirsher .ndo_set_features = efx_set_features, 2096cd2d5b52SBen Hutchings #ifdef CONFIG_SFC_SRIOV 2097cd2d5b52SBen Hutchings .ndo_set_vf_mac = efx_sriov_set_vf_mac, 2098cd2d5b52SBen Hutchings .ndo_set_vf_vlan = efx_sriov_set_vf_vlan, 2099cd2d5b52SBen Hutchings .ndo_set_vf_spoofchk = efx_sriov_set_vf_spoofchk, 2100cd2d5b52SBen Hutchings .ndo_get_vf_config = efx_sriov_get_vf_config, 2101cd2d5b52SBen Hutchings #endif 2102874aeea5SJeff Kirsher #ifdef CONFIG_NET_POLL_CONTROLLER 2103874aeea5SJeff Kirsher .ndo_poll_controller = efx_netpoll, 2104874aeea5SJeff Kirsher #endif 2105874aeea5SJeff Kirsher .ndo_setup_tc = efx_setup_tc, 2106874aeea5SJeff Kirsher #ifdef CONFIG_RFS_ACCEL 2107874aeea5SJeff Kirsher .ndo_rx_flow_steer = efx_filter_rfs, 2108874aeea5SJeff Kirsher #endif 2109874aeea5SJeff Kirsher }; 2110874aeea5SJeff Kirsher 2111874aeea5SJeff Kirsher static void efx_update_name(struct efx_nic *efx) 2112874aeea5SJeff Kirsher { 2113874aeea5SJeff Kirsher strcpy(efx->name, efx->net_dev->name); 2114874aeea5SJeff Kirsher efx_mtd_rename(efx); 2115874aeea5SJeff Kirsher efx_set_channel_names(efx); 2116874aeea5SJeff Kirsher } 2117874aeea5SJeff Kirsher 2118874aeea5SJeff Kirsher static int efx_netdev_event(struct notifier_block *this, 2119874aeea5SJeff Kirsher unsigned long event, void *ptr) 2120874aeea5SJeff Kirsher { 2121874aeea5SJeff Kirsher struct net_device *net_dev = ptr; 2122874aeea5SJeff Kirsher 2123874aeea5SJeff Kirsher if (net_dev->netdev_ops == &efx_netdev_ops && 2124874aeea5SJeff Kirsher event == NETDEV_CHANGENAME) 2125874aeea5SJeff Kirsher efx_update_name(netdev_priv(net_dev)); 2126874aeea5SJeff Kirsher 2127874aeea5SJeff Kirsher return NOTIFY_DONE; 2128874aeea5SJeff Kirsher } 2129874aeea5SJeff Kirsher 2130874aeea5SJeff Kirsher static struct notifier_block efx_netdev_notifier = { 2131874aeea5SJeff Kirsher .notifier_call = efx_netdev_event, 2132874aeea5SJeff Kirsher }; 2133874aeea5SJeff Kirsher 2134874aeea5SJeff Kirsher static ssize_t 2135874aeea5SJeff Kirsher show_phy_type(struct device *dev, struct device_attribute *attr, char *buf) 2136874aeea5SJeff Kirsher { 2137874aeea5SJeff Kirsher struct efx_nic *efx = pci_get_drvdata(to_pci_dev(dev)); 2138874aeea5SJeff Kirsher return sprintf(buf, "%d\n", efx->phy_type); 2139874aeea5SJeff Kirsher } 2140874aeea5SJeff Kirsher static DEVICE_ATTR(phy_type, 0644, show_phy_type, NULL); 2141874aeea5SJeff Kirsher 2142874aeea5SJeff Kirsher static int efx_register_netdev(struct efx_nic *efx) 2143874aeea5SJeff Kirsher { 2144874aeea5SJeff Kirsher struct net_device *net_dev = efx->net_dev; 2145874aeea5SJeff Kirsher struct efx_channel *channel; 2146874aeea5SJeff Kirsher int rc; 2147874aeea5SJeff Kirsher 2148874aeea5SJeff Kirsher net_dev->watchdog_timeo = 5 * HZ; 2149874aeea5SJeff Kirsher net_dev->irq = efx->pci_dev->irq; 2150874aeea5SJeff Kirsher net_dev->netdev_ops = &efx_netdev_ops; 2151874aeea5SJeff Kirsher SET_ETHTOOL_OPS(net_dev, &efx_ethtool_ops); 21527e6d06f0SBen Hutchings net_dev->gso_max_segs = EFX_TSO_MAX_SEGS; 2153874aeea5SJeff Kirsher 2154874aeea5SJeff Kirsher rtnl_lock(); 2155874aeea5SJeff Kirsher 21567153f623SBen Hutchings /* Enable resets to be scheduled and check whether any were 21577153f623SBen Hutchings * already requested. If so, the NIC is probably hosed so we 21587153f623SBen Hutchings * abort. 21597153f623SBen Hutchings */ 21607153f623SBen Hutchings efx->state = STATE_READY; 21617153f623SBen Hutchings smp_mb(); /* ensure we change state before checking reset_pending */ 21627153f623SBen Hutchings if (efx->reset_pending) { 21637153f623SBen Hutchings netif_err(efx, probe, efx->net_dev, 21647153f623SBen Hutchings "aborting probe due to scheduled reset\n"); 21657153f623SBen Hutchings rc = -EIO; 21667153f623SBen Hutchings goto fail_locked; 21677153f623SBen Hutchings } 21687153f623SBen Hutchings 2169874aeea5SJeff Kirsher rc = dev_alloc_name(net_dev, net_dev->name); 2170874aeea5SJeff Kirsher if (rc < 0) 2171874aeea5SJeff Kirsher goto fail_locked; 2172874aeea5SJeff Kirsher efx_update_name(efx); 2173874aeea5SJeff Kirsher 21748f8b3d51SBen Hutchings /* Always start with carrier off; PHY events will detect the link */ 21758f8b3d51SBen Hutchings netif_carrier_off(net_dev); 21768f8b3d51SBen Hutchings 2177874aeea5SJeff Kirsher rc = register_netdevice(net_dev); 2178874aeea5SJeff Kirsher if (rc) 2179874aeea5SJeff Kirsher goto fail_locked; 2180874aeea5SJeff Kirsher 2181874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) { 2182874aeea5SJeff Kirsher struct efx_tx_queue *tx_queue; 2183874aeea5SJeff Kirsher efx_for_each_channel_tx_queue(tx_queue, channel) 2184874aeea5SJeff Kirsher efx_init_tx_queue_core_txq(tx_queue); 2185874aeea5SJeff Kirsher } 2186874aeea5SJeff Kirsher 2187874aeea5SJeff Kirsher rtnl_unlock(); 2188874aeea5SJeff Kirsher 2189874aeea5SJeff Kirsher rc = device_create_file(&efx->pci_dev->dev, &dev_attr_phy_type); 2190874aeea5SJeff Kirsher if (rc) { 2191874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, 2192874aeea5SJeff Kirsher "failed to init net dev attributes\n"); 2193874aeea5SJeff Kirsher goto fail_registered; 2194874aeea5SJeff Kirsher } 2195874aeea5SJeff Kirsher 2196874aeea5SJeff Kirsher return 0; 2197874aeea5SJeff Kirsher 21987153f623SBen Hutchings fail_registered: 21997153f623SBen Hutchings rtnl_lock(); 22007153f623SBen Hutchings unregister_netdevice(net_dev); 2201874aeea5SJeff Kirsher fail_locked: 22027153f623SBen Hutchings efx->state = STATE_UNINIT; 2203874aeea5SJeff Kirsher rtnl_unlock(); 2204874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, "could not register net dev\n"); 2205874aeea5SJeff Kirsher return rc; 2206874aeea5SJeff Kirsher } 2207874aeea5SJeff Kirsher 2208874aeea5SJeff Kirsher static void efx_unregister_netdev(struct efx_nic *efx) 2209874aeea5SJeff Kirsher { 2210874aeea5SJeff Kirsher struct efx_channel *channel; 2211874aeea5SJeff Kirsher struct efx_tx_queue *tx_queue; 2212874aeea5SJeff Kirsher 2213874aeea5SJeff Kirsher if (!efx->net_dev) 2214874aeea5SJeff Kirsher return; 2215874aeea5SJeff Kirsher 2216874aeea5SJeff Kirsher BUG_ON(netdev_priv(efx->net_dev) != efx); 2217874aeea5SJeff Kirsher 2218874aeea5SJeff Kirsher /* Free up any skbs still remaining. This has to happen before 2219874aeea5SJeff Kirsher * we try to unregister the netdev as running their destructors 2220874aeea5SJeff Kirsher * may be needed to get the device ref. count to 0. */ 2221874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) { 2222874aeea5SJeff Kirsher efx_for_each_channel_tx_queue(tx_queue, channel) 2223874aeea5SJeff Kirsher efx_release_tx_buffers(tx_queue); 2224874aeea5SJeff Kirsher } 2225874aeea5SJeff Kirsher 2226874aeea5SJeff Kirsher strlcpy(efx->name, pci_name(efx->pci_dev), sizeof(efx->name)); 2227874aeea5SJeff Kirsher device_remove_file(&efx->pci_dev->dev, &dev_attr_phy_type); 22287153f623SBen Hutchings 22297153f623SBen Hutchings rtnl_lock(); 22307153f623SBen Hutchings unregister_netdevice(efx->net_dev); 22317153f623SBen Hutchings efx->state = STATE_UNINIT; 22327153f623SBen Hutchings rtnl_unlock(); 2233874aeea5SJeff Kirsher } 2234874aeea5SJeff Kirsher 2235874aeea5SJeff Kirsher /************************************************************************** 2236874aeea5SJeff Kirsher * 2237874aeea5SJeff Kirsher * Device reset and suspend 2238874aeea5SJeff Kirsher * 2239874aeea5SJeff Kirsher **************************************************************************/ 2240874aeea5SJeff Kirsher 2241874aeea5SJeff Kirsher /* Tears down the entire software state and most of the hardware state 2242874aeea5SJeff Kirsher * before reset. */ 2243874aeea5SJeff Kirsher void efx_reset_down(struct efx_nic *efx, enum reset_type method) 2244874aeea5SJeff Kirsher { 2245874aeea5SJeff Kirsher EFX_ASSERT_RESET_SERIALISED(efx); 2246874aeea5SJeff Kirsher 2247874aeea5SJeff Kirsher efx_stop_all(efx); 22487f967c01SBen Hutchings efx_stop_interrupts(efx, false); 22495642ceefSBen Hutchings 22505642ceefSBen Hutchings mutex_lock(&efx->mac_lock); 2251874aeea5SJeff Kirsher if (efx->port_initialized && method != RESET_TYPE_INVISIBLE) 2252874aeea5SJeff Kirsher efx->phy_op->fini(efx); 2253874aeea5SJeff Kirsher efx->type->fini(efx); 2254874aeea5SJeff Kirsher } 2255874aeea5SJeff Kirsher 2256874aeea5SJeff Kirsher /* This function will always ensure that the locks acquired in 2257874aeea5SJeff Kirsher * efx_reset_down() are released. A failure return code indicates 2258874aeea5SJeff Kirsher * that we were unable to reinitialise the hardware, and the 2259874aeea5SJeff Kirsher * driver should be disabled. If ok is false, then the rx and tx 2260874aeea5SJeff Kirsher * engines are not restarted, pending a RESET_DISABLE. */ 2261874aeea5SJeff Kirsher int efx_reset_up(struct efx_nic *efx, enum reset_type method, bool ok) 2262874aeea5SJeff Kirsher { 2263874aeea5SJeff Kirsher int rc; 2264874aeea5SJeff Kirsher 2265874aeea5SJeff Kirsher EFX_ASSERT_RESET_SERIALISED(efx); 2266874aeea5SJeff Kirsher 2267874aeea5SJeff Kirsher rc = efx->type->init(efx); 2268874aeea5SJeff Kirsher if (rc) { 2269874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, "failed to initialise NIC\n"); 2270874aeea5SJeff Kirsher goto fail; 2271874aeea5SJeff Kirsher } 2272874aeea5SJeff Kirsher 2273874aeea5SJeff Kirsher if (!ok) 2274874aeea5SJeff Kirsher goto fail; 2275874aeea5SJeff Kirsher 2276874aeea5SJeff Kirsher if (efx->port_initialized && method != RESET_TYPE_INVISIBLE) { 2277874aeea5SJeff Kirsher rc = efx->phy_op->init(efx); 2278874aeea5SJeff Kirsher if (rc) 2279874aeea5SJeff Kirsher goto fail; 2280874aeea5SJeff Kirsher if (efx->phy_op->reconfigure(efx)) 2281874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, 2282874aeea5SJeff Kirsher "could not restore PHY settings\n"); 2283874aeea5SJeff Kirsher } 2284874aeea5SJeff Kirsher 2285710b208dSBen Hutchings efx->type->reconfigure_mac(efx); 2286874aeea5SJeff Kirsher 22877f967c01SBen Hutchings efx_start_interrupts(efx, false); 2288874aeea5SJeff Kirsher efx_restore_filters(efx); 2289cd2d5b52SBen Hutchings efx_sriov_reset(efx); 2290874aeea5SJeff Kirsher 2291874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 2292874aeea5SJeff Kirsher 2293874aeea5SJeff Kirsher efx_start_all(efx); 2294874aeea5SJeff Kirsher 2295874aeea5SJeff Kirsher return 0; 2296874aeea5SJeff Kirsher 2297874aeea5SJeff Kirsher fail: 2298874aeea5SJeff Kirsher efx->port_initialized = false; 2299874aeea5SJeff Kirsher 2300874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 2301874aeea5SJeff Kirsher 2302874aeea5SJeff Kirsher return rc; 2303874aeea5SJeff Kirsher } 2304874aeea5SJeff Kirsher 2305874aeea5SJeff Kirsher /* Reset the NIC using the specified method. Note that the reset may 2306874aeea5SJeff Kirsher * fail, in which case the card will be left in an unusable state. 2307874aeea5SJeff Kirsher * 2308874aeea5SJeff Kirsher * Caller must hold the rtnl_lock. 2309874aeea5SJeff Kirsher */ 2310874aeea5SJeff Kirsher int efx_reset(struct efx_nic *efx, enum reset_type method) 2311874aeea5SJeff Kirsher { 2312874aeea5SJeff Kirsher int rc, rc2; 2313874aeea5SJeff Kirsher bool disabled; 2314874aeea5SJeff Kirsher 2315874aeea5SJeff Kirsher netif_info(efx, drv, efx->net_dev, "resetting (%s)\n", 2316874aeea5SJeff Kirsher RESET_TYPE(method)); 2317874aeea5SJeff Kirsher 2318c2f3b8e3SDaniel Pieczko efx_device_detach_sync(efx); 2319874aeea5SJeff Kirsher efx_reset_down(efx, method); 2320874aeea5SJeff Kirsher 2321874aeea5SJeff Kirsher rc = efx->type->reset(efx, method); 2322874aeea5SJeff Kirsher if (rc) { 2323874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, "failed to reset hardware\n"); 2324874aeea5SJeff Kirsher goto out; 2325874aeea5SJeff Kirsher } 2326874aeea5SJeff Kirsher 2327874aeea5SJeff Kirsher /* Clear flags for the scopes we covered. We assume the NIC and 2328874aeea5SJeff Kirsher * driver are now quiescent so that there is no race here. 2329874aeea5SJeff Kirsher */ 2330874aeea5SJeff Kirsher efx->reset_pending &= -(1 << (method + 1)); 2331874aeea5SJeff Kirsher 2332874aeea5SJeff Kirsher /* Reinitialise bus-mastering, which may have been turned off before 2333874aeea5SJeff Kirsher * the reset was scheduled. This is still appropriate, even in the 2334874aeea5SJeff Kirsher * RESET_TYPE_DISABLE since this driver generally assumes the hardware 2335874aeea5SJeff Kirsher * can respond to requests. */ 2336874aeea5SJeff Kirsher pci_set_master(efx->pci_dev); 2337874aeea5SJeff Kirsher 2338874aeea5SJeff Kirsher out: 2339874aeea5SJeff Kirsher /* Leave device stopped if necessary */ 2340626950dbSAlexandre Rames disabled = rc || 2341626950dbSAlexandre Rames method == RESET_TYPE_DISABLE || 2342626950dbSAlexandre Rames method == RESET_TYPE_RECOVER_OR_DISABLE; 2343874aeea5SJeff Kirsher rc2 = efx_reset_up(efx, method, !disabled); 2344874aeea5SJeff Kirsher if (rc2) { 2345874aeea5SJeff Kirsher disabled = true; 2346874aeea5SJeff Kirsher if (!rc) 2347874aeea5SJeff Kirsher rc = rc2; 2348874aeea5SJeff Kirsher } 2349874aeea5SJeff Kirsher 2350874aeea5SJeff Kirsher if (disabled) { 2351874aeea5SJeff Kirsher dev_close(efx->net_dev); 2352874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, "has been disabled\n"); 2353874aeea5SJeff Kirsher efx->state = STATE_DISABLED; 2354874aeea5SJeff Kirsher } else { 2355874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "reset complete\n"); 2356874aeea5SJeff Kirsher netif_device_attach(efx->net_dev); 2357874aeea5SJeff Kirsher } 2358874aeea5SJeff Kirsher return rc; 2359874aeea5SJeff Kirsher } 2360874aeea5SJeff Kirsher 2361626950dbSAlexandre Rames /* Try recovery mechanisms. 2362626950dbSAlexandre Rames * For now only EEH is supported. 2363626950dbSAlexandre Rames * Returns 0 if the recovery mechanisms are unsuccessful. 2364626950dbSAlexandre Rames * Returns a non-zero value otherwise. 2365626950dbSAlexandre Rames */ 2366626950dbSAlexandre Rames static int efx_try_recovery(struct efx_nic *efx) 2367626950dbSAlexandre Rames { 2368626950dbSAlexandre Rames #ifdef CONFIG_EEH 2369626950dbSAlexandre Rames /* A PCI error can occur and not be seen by EEH because nothing 2370626950dbSAlexandre Rames * happens on the PCI bus. In this case the driver may fail and 2371626950dbSAlexandre Rames * schedule a 'recover or reset', leading to this recovery handler. 2372626950dbSAlexandre Rames * Manually call the eeh failure check function. 2373626950dbSAlexandre Rames */ 2374626950dbSAlexandre Rames struct eeh_dev *eehdev = 2375626950dbSAlexandre Rames of_node_to_eeh_dev(pci_device_to_OF_node(efx->pci_dev)); 2376626950dbSAlexandre Rames 2377626950dbSAlexandre Rames if (eeh_dev_check_failure(eehdev)) { 2378626950dbSAlexandre Rames /* The EEH mechanisms will handle the error and reset the 2379626950dbSAlexandre Rames * device if necessary. 2380626950dbSAlexandre Rames */ 2381626950dbSAlexandre Rames return 1; 2382626950dbSAlexandre Rames } 2383626950dbSAlexandre Rames #endif 2384626950dbSAlexandre Rames return 0; 2385626950dbSAlexandre Rames } 2386626950dbSAlexandre Rames 2387874aeea5SJeff Kirsher /* The worker thread exists so that code that cannot sleep can 2388874aeea5SJeff Kirsher * schedule a reset for later. 2389874aeea5SJeff Kirsher */ 2390874aeea5SJeff Kirsher static void efx_reset_work(struct work_struct *data) 2391874aeea5SJeff Kirsher { 2392874aeea5SJeff Kirsher struct efx_nic *efx = container_of(data, struct efx_nic, reset_work); 2393626950dbSAlexandre Rames unsigned long pending; 2394626950dbSAlexandre Rames enum reset_type method; 2395626950dbSAlexandre Rames 2396626950dbSAlexandre Rames pending = ACCESS_ONCE(efx->reset_pending); 2397626950dbSAlexandre Rames method = fls(pending) - 1; 2398626950dbSAlexandre Rames 2399626950dbSAlexandre Rames if ((method == RESET_TYPE_RECOVER_OR_DISABLE || 2400626950dbSAlexandre Rames method == RESET_TYPE_RECOVER_OR_ALL) && 2401626950dbSAlexandre Rames efx_try_recovery(efx)) 2402626950dbSAlexandre Rames return; 2403874aeea5SJeff Kirsher 2404874aeea5SJeff Kirsher if (!pending) 2405874aeea5SJeff Kirsher return; 2406874aeea5SJeff Kirsher 2407874aeea5SJeff Kirsher rtnl_lock(); 24087153f623SBen Hutchings 24097153f623SBen Hutchings /* We checked the state in efx_schedule_reset() but it may 24107153f623SBen Hutchings * have changed by now. Now that we have the RTNL lock, 24117153f623SBen Hutchings * it cannot change again. 24127153f623SBen Hutchings */ 24137153f623SBen Hutchings if (efx->state == STATE_READY) 2414626950dbSAlexandre Rames (void)efx_reset(efx, method); 24157153f623SBen Hutchings 2416874aeea5SJeff Kirsher rtnl_unlock(); 2417874aeea5SJeff Kirsher } 2418874aeea5SJeff Kirsher 2419874aeea5SJeff Kirsher void efx_schedule_reset(struct efx_nic *efx, enum reset_type type) 2420874aeea5SJeff Kirsher { 2421874aeea5SJeff Kirsher enum reset_type method; 2422874aeea5SJeff Kirsher 2423626950dbSAlexandre Rames if (efx->state == STATE_RECOVERY) { 2424626950dbSAlexandre Rames netif_dbg(efx, drv, efx->net_dev, 2425626950dbSAlexandre Rames "recovering: skip scheduling %s reset\n", 2426626950dbSAlexandre Rames RESET_TYPE(type)); 2427626950dbSAlexandre Rames return; 2428626950dbSAlexandre Rames } 2429626950dbSAlexandre Rames 2430874aeea5SJeff Kirsher switch (type) { 2431874aeea5SJeff Kirsher case RESET_TYPE_INVISIBLE: 2432874aeea5SJeff Kirsher case RESET_TYPE_ALL: 2433626950dbSAlexandre Rames case RESET_TYPE_RECOVER_OR_ALL: 2434874aeea5SJeff Kirsher case RESET_TYPE_WORLD: 2435874aeea5SJeff Kirsher case RESET_TYPE_DISABLE: 2436626950dbSAlexandre Rames case RESET_TYPE_RECOVER_OR_DISABLE: 2437874aeea5SJeff Kirsher method = type; 2438874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "scheduling %s reset\n", 2439874aeea5SJeff Kirsher RESET_TYPE(method)); 2440874aeea5SJeff Kirsher break; 2441874aeea5SJeff Kirsher default: 2442874aeea5SJeff Kirsher method = efx->type->map_reset_reason(type); 2443874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, 2444874aeea5SJeff Kirsher "scheduling %s reset for %s\n", 2445874aeea5SJeff Kirsher RESET_TYPE(method), RESET_TYPE(type)); 2446874aeea5SJeff Kirsher break; 2447874aeea5SJeff Kirsher } 2448874aeea5SJeff Kirsher 2449874aeea5SJeff Kirsher set_bit(method, &efx->reset_pending); 24507153f623SBen Hutchings smp_mb(); /* ensure we change reset_pending before checking state */ 24517153f623SBen Hutchings 24527153f623SBen Hutchings /* If we're not READY then just leave the flags set as the cue 24537153f623SBen Hutchings * to abort probing or reschedule the reset later. 24547153f623SBen Hutchings */ 24557153f623SBen Hutchings if (ACCESS_ONCE(efx->state) != STATE_READY) 24567153f623SBen Hutchings return; 2457874aeea5SJeff Kirsher 2458874aeea5SJeff Kirsher /* efx_process_channel() will no longer read events once a 2459874aeea5SJeff Kirsher * reset is scheduled. So switch back to poll'd MCDI completions. */ 2460874aeea5SJeff Kirsher efx_mcdi_mode_poll(efx); 2461874aeea5SJeff Kirsher 2462874aeea5SJeff Kirsher queue_work(reset_workqueue, &efx->reset_work); 2463874aeea5SJeff Kirsher } 2464874aeea5SJeff Kirsher 2465874aeea5SJeff Kirsher /************************************************************************** 2466874aeea5SJeff Kirsher * 2467874aeea5SJeff Kirsher * List of NICs we support 2468874aeea5SJeff Kirsher * 2469874aeea5SJeff Kirsher **************************************************************************/ 2470874aeea5SJeff Kirsher 2471874aeea5SJeff Kirsher /* PCI device ID table */ 2472874aeea5SJeff Kirsher static DEFINE_PCI_DEVICE_TABLE(efx_pci_table) = { 24730e59e7e7SLinus Torvalds {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 24740e59e7e7SLinus Torvalds PCI_DEVICE_ID_SOLARFLARE_SFC4000A_0), 2475874aeea5SJeff Kirsher .driver_data = (unsigned long) &falcon_a1_nic_type}, 24760e59e7e7SLinus Torvalds {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 24770e59e7e7SLinus Torvalds PCI_DEVICE_ID_SOLARFLARE_SFC4000B), 2478874aeea5SJeff Kirsher .driver_data = (unsigned long) &falcon_b0_nic_type}, 2479547c474fSBen Hutchings {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0803), /* SFC9020 */ 2480874aeea5SJeff Kirsher .driver_data = (unsigned long) &siena_a0_nic_type}, 2481547c474fSBen Hutchings {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0813), /* SFL9021 */ 2482874aeea5SJeff Kirsher .driver_data = (unsigned long) &siena_a0_nic_type}, 2483874aeea5SJeff Kirsher {0} /* end of list */ 2484874aeea5SJeff Kirsher }; 2485874aeea5SJeff Kirsher 2486874aeea5SJeff Kirsher /************************************************************************** 2487874aeea5SJeff Kirsher * 2488874aeea5SJeff Kirsher * Dummy PHY/MAC operations 2489874aeea5SJeff Kirsher * 2490874aeea5SJeff Kirsher * Can be used for some unimplemented operations 2491874aeea5SJeff Kirsher * Needed so all function pointers are valid and do not have to be tested 2492874aeea5SJeff Kirsher * before use 2493874aeea5SJeff Kirsher * 2494874aeea5SJeff Kirsher **************************************************************************/ 2495874aeea5SJeff Kirsher int efx_port_dummy_op_int(struct efx_nic *efx) 2496874aeea5SJeff Kirsher { 2497874aeea5SJeff Kirsher return 0; 2498874aeea5SJeff Kirsher } 2499874aeea5SJeff Kirsher void efx_port_dummy_op_void(struct efx_nic *efx) {} 2500874aeea5SJeff Kirsher 2501874aeea5SJeff Kirsher static bool efx_port_dummy_op_poll(struct efx_nic *efx) 2502874aeea5SJeff Kirsher { 2503874aeea5SJeff Kirsher return false; 2504874aeea5SJeff Kirsher } 2505874aeea5SJeff Kirsher 2506874aeea5SJeff Kirsher static const struct efx_phy_operations efx_dummy_phy_operations = { 2507874aeea5SJeff Kirsher .init = efx_port_dummy_op_int, 2508874aeea5SJeff Kirsher .reconfigure = efx_port_dummy_op_int, 2509874aeea5SJeff Kirsher .poll = efx_port_dummy_op_poll, 2510874aeea5SJeff Kirsher .fini = efx_port_dummy_op_void, 2511874aeea5SJeff Kirsher }; 2512874aeea5SJeff Kirsher 2513874aeea5SJeff Kirsher /************************************************************************** 2514874aeea5SJeff Kirsher * 2515874aeea5SJeff Kirsher * Data housekeeping 2516874aeea5SJeff Kirsher * 2517874aeea5SJeff Kirsher **************************************************************************/ 2518874aeea5SJeff Kirsher 2519874aeea5SJeff Kirsher /* This zeroes out and then fills in the invariants in a struct 2520874aeea5SJeff Kirsher * efx_nic (including all sub-structures). 2521874aeea5SJeff Kirsher */ 2522adeb15aaSBen Hutchings static int efx_init_struct(struct efx_nic *efx, 2523874aeea5SJeff Kirsher struct pci_dev *pci_dev, struct net_device *net_dev) 2524874aeea5SJeff Kirsher { 2525874aeea5SJeff Kirsher int i; 2526874aeea5SJeff Kirsher 2527874aeea5SJeff Kirsher /* Initialise common structures */ 2528874aeea5SJeff Kirsher spin_lock_init(&efx->biu_lock); 2529874aeea5SJeff Kirsher #ifdef CONFIG_SFC_MTD 2530874aeea5SJeff Kirsher INIT_LIST_HEAD(&efx->mtd_list); 2531874aeea5SJeff Kirsher #endif 2532874aeea5SJeff Kirsher INIT_WORK(&efx->reset_work, efx_reset_work); 2533874aeea5SJeff Kirsher INIT_DELAYED_WORK(&efx->monitor_work, efx_monitor); 2534dd40781eSBen Hutchings INIT_DELAYED_WORK(&efx->selftest_work, efx_selftest_async_work); 2535874aeea5SJeff Kirsher efx->pci_dev = pci_dev; 2536874aeea5SJeff Kirsher efx->msg_enable = debug; 2537f16aeea0SBen Hutchings efx->state = STATE_UNINIT; 2538874aeea5SJeff Kirsher strlcpy(efx->name, pci_name(pci_dev), sizeof(efx->name)); 2539874aeea5SJeff Kirsher 2540874aeea5SJeff Kirsher efx->net_dev = net_dev; 2541874aeea5SJeff Kirsher spin_lock_init(&efx->stats_lock); 2542874aeea5SJeff Kirsher mutex_init(&efx->mac_lock); 2543874aeea5SJeff Kirsher efx->phy_op = &efx_dummy_phy_operations; 2544874aeea5SJeff Kirsher efx->mdio.dev = net_dev; 2545874aeea5SJeff Kirsher INIT_WORK(&efx->mac_work, efx_mac_work); 25469f2cb71cSBen Hutchings init_waitqueue_head(&efx->flush_wq); 2547874aeea5SJeff Kirsher 2548874aeea5SJeff Kirsher for (i = 0; i < EFX_MAX_CHANNELS; i++) { 2549874aeea5SJeff Kirsher efx->channel[i] = efx_alloc_channel(efx, i, NULL); 2550874aeea5SJeff Kirsher if (!efx->channel[i]) 2551874aeea5SJeff Kirsher goto fail; 2552874aeea5SJeff Kirsher } 2553874aeea5SJeff Kirsher 2554874aeea5SJeff Kirsher EFX_BUG_ON_PARANOID(efx->type->phys_addr_channels > EFX_MAX_CHANNELS); 2555874aeea5SJeff Kirsher 2556874aeea5SJeff Kirsher /* Higher numbered interrupt modes are less capable! */ 2557874aeea5SJeff Kirsher efx->interrupt_mode = max(efx->type->max_interrupt_mode, 2558874aeea5SJeff Kirsher interrupt_mode); 2559874aeea5SJeff Kirsher 2560874aeea5SJeff Kirsher /* Would be good to use the net_dev name, but we're too early */ 2561874aeea5SJeff Kirsher snprintf(efx->workqueue_name, sizeof(efx->workqueue_name), "sfc%s", 2562874aeea5SJeff Kirsher pci_name(pci_dev)); 2563874aeea5SJeff Kirsher efx->workqueue = create_singlethread_workqueue(efx->workqueue_name); 2564874aeea5SJeff Kirsher if (!efx->workqueue) 2565874aeea5SJeff Kirsher goto fail; 2566874aeea5SJeff Kirsher 2567874aeea5SJeff Kirsher return 0; 2568874aeea5SJeff Kirsher 2569874aeea5SJeff Kirsher fail: 2570874aeea5SJeff Kirsher efx_fini_struct(efx); 2571874aeea5SJeff Kirsher return -ENOMEM; 2572874aeea5SJeff Kirsher } 2573874aeea5SJeff Kirsher 2574874aeea5SJeff Kirsher static void efx_fini_struct(struct efx_nic *efx) 2575874aeea5SJeff Kirsher { 2576874aeea5SJeff Kirsher int i; 2577874aeea5SJeff Kirsher 2578874aeea5SJeff Kirsher for (i = 0; i < EFX_MAX_CHANNELS; i++) 2579874aeea5SJeff Kirsher kfree(efx->channel[i]); 2580874aeea5SJeff Kirsher 2581874aeea5SJeff Kirsher if (efx->workqueue) { 2582874aeea5SJeff Kirsher destroy_workqueue(efx->workqueue); 2583874aeea5SJeff Kirsher efx->workqueue = NULL; 2584874aeea5SJeff Kirsher } 2585874aeea5SJeff Kirsher } 2586874aeea5SJeff Kirsher 2587874aeea5SJeff Kirsher /************************************************************************** 2588874aeea5SJeff Kirsher * 2589874aeea5SJeff Kirsher * PCI interface 2590874aeea5SJeff Kirsher * 2591874aeea5SJeff Kirsher **************************************************************************/ 2592874aeea5SJeff Kirsher 2593874aeea5SJeff Kirsher /* Main body of final NIC shutdown code 2594874aeea5SJeff Kirsher * This is called only at module unload (or hotplug removal). 2595874aeea5SJeff Kirsher */ 2596874aeea5SJeff Kirsher static void efx_pci_remove_main(struct efx_nic *efx) 2597874aeea5SJeff Kirsher { 25987153f623SBen Hutchings /* Flush reset_work. It can no longer be scheduled since we 25997153f623SBen Hutchings * are not READY. 26007153f623SBen Hutchings */ 26017153f623SBen Hutchings BUG_ON(efx->state == STATE_READY); 26027153f623SBen Hutchings cancel_work_sync(&efx->reset_work); 26037153f623SBen Hutchings 2604874aeea5SJeff Kirsher #ifdef CONFIG_RFS_ACCEL 2605874aeea5SJeff Kirsher free_irq_cpu_rmap(efx->net_dev->rx_cpu_rmap); 2606874aeea5SJeff Kirsher efx->net_dev->rx_cpu_rmap = NULL; 2607874aeea5SJeff Kirsher #endif 26087f967c01SBen Hutchings efx_stop_interrupts(efx, false); 2609874aeea5SJeff Kirsher efx_nic_fini_interrupt(efx); 2610874aeea5SJeff Kirsher efx_fini_port(efx); 2611874aeea5SJeff Kirsher efx->type->fini(efx); 2612874aeea5SJeff Kirsher efx_fini_napi(efx); 2613874aeea5SJeff Kirsher efx_remove_all(efx); 2614874aeea5SJeff Kirsher } 2615874aeea5SJeff Kirsher 2616874aeea5SJeff Kirsher /* Final NIC shutdown 2617874aeea5SJeff Kirsher * This is called only at module unload (or hotplug removal). 2618874aeea5SJeff Kirsher */ 2619874aeea5SJeff Kirsher static void efx_pci_remove(struct pci_dev *pci_dev) 2620874aeea5SJeff Kirsher { 2621874aeea5SJeff Kirsher struct efx_nic *efx; 2622874aeea5SJeff Kirsher 2623874aeea5SJeff Kirsher efx = pci_get_drvdata(pci_dev); 2624874aeea5SJeff Kirsher if (!efx) 2625874aeea5SJeff Kirsher return; 2626874aeea5SJeff Kirsher 2627874aeea5SJeff Kirsher /* Mark the NIC as fini, then stop the interface */ 2628874aeea5SJeff Kirsher rtnl_lock(); 2629874aeea5SJeff Kirsher dev_close(efx->net_dev); 26305642ceefSBen Hutchings efx_stop_interrupts(efx, false); 2631874aeea5SJeff Kirsher rtnl_unlock(); 2632874aeea5SJeff Kirsher 2633cd2d5b52SBen Hutchings efx_sriov_fini(efx); 2634874aeea5SJeff Kirsher efx_unregister_netdev(efx); 2635874aeea5SJeff Kirsher 2636874aeea5SJeff Kirsher efx_mtd_remove(efx); 2637874aeea5SJeff Kirsher 2638874aeea5SJeff Kirsher efx_pci_remove_main(efx); 2639874aeea5SJeff Kirsher 2640874aeea5SJeff Kirsher efx_fini_io(efx); 2641874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "shutdown successful\n"); 2642874aeea5SJeff Kirsher 2643874aeea5SJeff Kirsher efx_fini_struct(efx); 26443de4e301SBen Hutchings pci_set_drvdata(pci_dev, NULL); 2645874aeea5SJeff Kirsher free_netdev(efx->net_dev); 2646626950dbSAlexandre Rames 2647626950dbSAlexandre Rames pci_disable_pcie_error_reporting(pci_dev); 2648874aeea5SJeff Kirsher }; 2649874aeea5SJeff Kirsher 2650460eeaa0SBen Hutchings /* NIC VPD information 2651460eeaa0SBen Hutchings * Called during probe to display the part number of the 2652460eeaa0SBen Hutchings * installed NIC. VPD is potentially very large but this should 2653460eeaa0SBen Hutchings * always appear within the first 512 bytes. 2654460eeaa0SBen Hutchings */ 2655460eeaa0SBen Hutchings #define SFC_VPD_LEN 512 2656460eeaa0SBen Hutchings static void efx_print_product_vpd(struct efx_nic *efx) 2657460eeaa0SBen Hutchings { 2658460eeaa0SBen Hutchings struct pci_dev *dev = efx->pci_dev; 2659460eeaa0SBen Hutchings char vpd_data[SFC_VPD_LEN]; 2660460eeaa0SBen Hutchings ssize_t vpd_size; 2661460eeaa0SBen Hutchings int i, j; 2662460eeaa0SBen Hutchings 2663460eeaa0SBen Hutchings /* Get the vpd data from the device */ 2664460eeaa0SBen Hutchings vpd_size = pci_read_vpd(dev, 0, sizeof(vpd_data), vpd_data); 2665460eeaa0SBen Hutchings if (vpd_size <= 0) { 2666460eeaa0SBen Hutchings netif_err(efx, drv, efx->net_dev, "Unable to read VPD\n"); 2667460eeaa0SBen Hutchings return; 2668460eeaa0SBen Hutchings } 2669460eeaa0SBen Hutchings 2670460eeaa0SBen Hutchings /* Get the Read only section */ 2671460eeaa0SBen Hutchings i = pci_vpd_find_tag(vpd_data, 0, vpd_size, PCI_VPD_LRDT_RO_DATA); 2672460eeaa0SBen Hutchings if (i < 0) { 2673460eeaa0SBen Hutchings netif_err(efx, drv, efx->net_dev, "VPD Read-only not found\n"); 2674460eeaa0SBen Hutchings return; 2675460eeaa0SBen Hutchings } 2676460eeaa0SBen Hutchings 2677460eeaa0SBen Hutchings j = pci_vpd_lrdt_size(&vpd_data[i]); 2678460eeaa0SBen Hutchings i += PCI_VPD_LRDT_TAG_SIZE; 2679460eeaa0SBen Hutchings if (i + j > vpd_size) 2680460eeaa0SBen Hutchings j = vpd_size - i; 2681460eeaa0SBen Hutchings 2682460eeaa0SBen Hutchings /* Get the Part number */ 2683460eeaa0SBen Hutchings i = pci_vpd_find_info_keyword(vpd_data, i, j, "PN"); 2684460eeaa0SBen Hutchings if (i < 0) { 2685460eeaa0SBen Hutchings netif_err(efx, drv, efx->net_dev, "Part number not found\n"); 2686460eeaa0SBen Hutchings return; 2687460eeaa0SBen Hutchings } 2688460eeaa0SBen Hutchings 2689460eeaa0SBen Hutchings j = pci_vpd_info_field_size(&vpd_data[i]); 2690460eeaa0SBen Hutchings i += PCI_VPD_INFO_FLD_HDR_SIZE; 2691460eeaa0SBen Hutchings if (i + j > vpd_size) { 2692460eeaa0SBen Hutchings netif_err(efx, drv, efx->net_dev, "Incomplete part number\n"); 2693460eeaa0SBen Hutchings return; 2694460eeaa0SBen Hutchings } 2695460eeaa0SBen Hutchings 2696460eeaa0SBen Hutchings netif_info(efx, drv, efx->net_dev, 2697460eeaa0SBen Hutchings "Part Number : %.*s\n", j, &vpd_data[i]); 2698460eeaa0SBen Hutchings } 2699460eeaa0SBen Hutchings 2700460eeaa0SBen Hutchings 2701874aeea5SJeff Kirsher /* Main body of NIC initialisation 2702874aeea5SJeff Kirsher * This is called at module load (or hotplug insertion, theoretically). 2703874aeea5SJeff Kirsher */ 2704874aeea5SJeff Kirsher static int efx_pci_probe_main(struct efx_nic *efx) 2705874aeea5SJeff Kirsher { 2706874aeea5SJeff Kirsher int rc; 2707874aeea5SJeff Kirsher 2708874aeea5SJeff Kirsher /* Do start-of-day initialisation */ 2709874aeea5SJeff Kirsher rc = efx_probe_all(efx); 2710874aeea5SJeff Kirsher if (rc) 2711874aeea5SJeff Kirsher goto fail1; 2712874aeea5SJeff Kirsher 2713874aeea5SJeff Kirsher efx_init_napi(efx); 2714874aeea5SJeff Kirsher 2715874aeea5SJeff Kirsher rc = efx->type->init(efx); 2716874aeea5SJeff Kirsher if (rc) { 2717874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 2718874aeea5SJeff Kirsher "failed to initialise NIC\n"); 2719874aeea5SJeff Kirsher goto fail3; 2720874aeea5SJeff Kirsher } 2721874aeea5SJeff Kirsher 2722874aeea5SJeff Kirsher rc = efx_init_port(efx); 2723874aeea5SJeff Kirsher if (rc) { 2724874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 2725874aeea5SJeff Kirsher "failed to initialise port\n"); 2726874aeea5SJeff Kirsher goto fail4; 2727874aeea5SJeff Kirsher } 2728874aeea5SJeff Kirsher 2729874aeea5SJeff Kirsher rc = efx_nic_init_interrupt(efx); 2730874aeea5SJeff Kirsher if (rc) 2731874aeea5SJeff Kirsher goto fail5; 27327f967c01SBen Hutchings efx_start_interrupts(efx, false); 2733874aeea5SJeff Kirsher 2734874aeea5SJeff Kirsher return 0; 2735874aeea5SJeff Kirsher 2736874aeea5SJeff Kirsher fail5: 2737874aeea5SJeff Kirsher efx_fini_port(efx); 2738874aeea5SJeff Kirsher fail4: 2739874aeea5SJeff Kirsher efx->type->fini(efx); 2740874aeea5SJeff Kirsher fail3: 2741874aeea5SJeff Kirsher efx_fini_napi(efx); 2742874aeea5SJeff Kirsher efx_remove_all(efx); 2743874aeea5SJeff Kirsher fail1: 2744874aeea5SJeff Kirsher return rc; 2745874aeea5SJeff Kirsher } 2746874aeea5SJeff Kirsher 2747874aeea5SJeff Kirsher /* NIC initialisation 2748874aeea5SJeff Kirsher * 2749874aeea5SJeff Kirsher * This is called at module load (or hotplug insertion, 275073ba7b68SBen Hutchings * theoretically). It sets up PCI mappings, resets the NIC, 2751874aeea5SJeff Kirsher * sets up and registers the network devices with the kernel and hooks 2752874aeea5SJeff Kirsher * the interrupt service routine. It does not prepare the device for 2753874aeea5SJeff Kirsher * transmission; this is left to the first time one of the network 2754874aeea5SJeff Kirsher * interfaces is brought up (i.e. efx_net_open). 2755874aeea5SJeff Kirsher */ 275687d1fc11SBill Pemberton static int efx_pci_probe(struct pci_dev *pci_dev, 2757874aeea5SJeff Kirsher const struct pci_device_id *entry) 2758874aeea5SJeff Kirsher { 2759874aeea5SJeff Kirsher struct net_device *net_dev; 2760874aeea5SJeff Kirsher struct efx_nic *efx; 2761fadac6aaSBen Hutchings int rc; 2762874aeea5SJeff Kirsher 2763874aeea5SJeff Kirsher /* Allocate and initialise a struct net_device and struct efx_nic */ 2764874aeea5SJeff Kirsher net_dev = alloc_etherdev_mqs(sizeof(*efx), EFX_MAX_CORE_TX_QUEUES, 2765874aeea5SJeff Kirsher EFX_MAX_RX_QUEUES); 2766874aeea5SJeff Kirsher if (!net_dev) 2767874aeea5SJeff Kirsher return -ENOMEM; 2768adeb15aaSBen Hutchings efx = netdev_priv(net_dev); 2769adeb15aaSBen Hutchings efx->type = (const struct efx_nic_type *) entry->driver_data; 2770adeb15aaSBen Hutchings net_dev->features |= (efx->type->offload_features | NETIF_F_SG | 2771874aeea5SJeff Kirsher NETIF_F_HIGHDMA | NETIF_F_TSO | 2772874aeea5SJeff Kirsher NETIF_F_RXCSUM); 2773adeb15aaSBen Hutchings if (efx->type->offload_features & NETIF_F_V6_CSUM) 2774874aeea5SJeff Kirsher net_dev->features |= NETIF_F_TSO6; 2775874aeea5SJeff Kirsher /* Mask for features that also apply to VLAN devices */ 2776874aeea5SJeff Kirsher net_dev->vlan_features |= (NETIF_F_ALL_CSUM | NETIF_F_SG | 2777874aeea5SJeff Kirsher NETIF_F_HIGHDMA | NETIF_F_ALL_TSO | 2778874aeea5SJeff Kirsher NETIF_F_RXCSUM); 2779874aeea5SJeff Kirsher /* All offloads can be toggled */ 2780874aeea5SJeff Kirsher net_dev->hw_features = net_dev->features & ~NETIF_F_HIGHDMA; 2781874aeea5SJeff Kirsher pci_set_drvdata(pci_dev, efx); 2782874aeea5SJeff Kirsher SET_NETDEV_DEV(net_dev, &pci_dev->dev); 2783adeb15aaSBen Hutchings rc = efx_init_struct(efx, pci_dev, net_dev); 2784874aeea5SJeff Kirsher if (rc) 2785874aeea5SJeff Kirsher goto fail1; 2786874aeea5SJeff Kirsher 2787874aeea5SJeff Kirsher netif_info(efx, probe, efx->net_dev, 2788874aeea5SJeff Kirsher "Solarflare NIC detected\n"); 2789874aeea5SJeff Kirsher 2790460eeaa0SBen Hutchings efx_print_product_vpd(efx); 2791460eeaa0SBen Hutchings 2792874aeea5SJeff Kirsher /* Set up basic I/O (BAR mappings etc) */ 2793874aeea5SJeff Kirsher rc = efx_init_io(efx); 2794874aeea5SJeff Kirsher if (rc) 2795874aeea5SJeff Kirsher goto fail2; 2796874aeea5SJeff Kirsher 2797874aeea5SJeff Kirsher rc = efx_pci_probe_main(efx); 2798fadac6aaSBen Hutchings if (rc) 2799874aeea5SJeff Kirsher goto fail3; 2800874aeea5SJeff Kirsher 2801874aeea5SJeff Kirsher rc = efx_register_netdev(efx); 2802874aeea5SJeff Kirsher if (rc) 2803fadac6aaSBen Hutchings goto fail4; 2804874aeea5SJeff Kirsher 2805cd2d5b52SBen Hutchings rc = efx_sriov_init(efx); 2806cd2d5b52SBen Hutchings if (rc) 2807cd2d5b52SBen Hutchings netif_err(efx, probe, efx->net_dev, 2808cd2d5b52SBen Hutchings "SR-IOV can't be enabled rc %d\n", rc); 2809cd2d5b52SBen Hutchings 2810874aeea5SJeff Kirsher netif_dbg(efx, probe, efx->net_dev, "initialisation successful\n"); 2811874aeea5SJeff Kirsher 28127c43161cSBen Hutchings /* Try to create MTDs, but allow this to fail */ 2813874aeea5SJeff Kirsher rtnl_lock(); 28147c43161cSBen Hutchings rc = efx_mtd_probe(efx); 2815874aeea5SJeff Kirsher rtnl_unlock(); 28167c43161cSBen Hutchings if (rc) 28177c43161cSBen Hutchings netif_warn(efx, probe, efx->net_dev, 28187c43161cSBen Hutchings "failed to create MTDs (%d)\n", rc); 28197c43161cSBen Hutchings 2820626950dbSAlexandre Rames rc = pci_enable_pcie_error_reporting(pci_dev); 2821626950dbSAlexandre Rames if (rc && rc != -EINVAL) 2822626950dbSAlexandre Rames netif_warn(efx, probe, efx->net_dev, 2823626950dbSAlexandre Rames "pci_enable_pcie_error_reporting failed (%d)\n", rc); 2824626950dbSAlexandre Rames 2825874aeea5SJeff Kirsher return 0; 2826874aeea5SJeff Kirsher 2827874aeea5SJeff Kirsher fail4: 2828fadac6aaSBen Hutchings efx_pci_remove_main(efx); 2829874aeea5SJeff Kirsher fail3: 2830874aeea5SJeff Kirsher efx_fini_io(efx); 2831874aeea5SJeff Kirsher fail2: 2832874aeea5SJeff Kirsher efx_fini_struct(efx); 2833874aeea5SJeff Kirsher fail1: 28343de4e301SBen Hutchings pci_set_drvdata(pci_dev, NULL); 2835874aeea5SJeff Kirsher WARN_ON(rc > 0); 2836874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "initialisation failed. rc=%d\n", rc); 2837874aeea5SJeff Kirsher free_netdev(net_dev); 2838874aeea5SJeff Kirsher return rc; 2839874aeea5SJeff Kirsher } 2840874aeea5SJeff Kirsher 2841874aeea5SJeff Kirsher static int efx_pm_freeze(struct device *dev) 2842874aeea5SJeff Kirsher { 2843874aeea5SJeff Kirsher struct efx_nic *efx = pci_get_drvdata(to_pci_dev(dev)); 2844874aeea5SJeff Kirsher 284561da026dSBen Hutchings rtnl_lock(); 284661da026dSBen Hutchings 28476032fb56SBen Hutchings if (efx->state != STATE_DISABLED) { 2848f16aeea0SBen Hutchings efx->state = STATE_UNINIT; 2849874aeea5SJeff Kirsher 2850c2f3b8e3SDaniel Pieczko efx_device_detach_sync(efx); 2851874aeea5SJeff Kirsher 2852874aeea5SJeff Kirsher efx_stop_all(efx); 28537f967c01SBen Hutchings efx_stop_interrupts(efx, false); 28546032fb56SBen Hutchings } 2855874aeea5SJeff Kirsher 285661da026dSBen Hutchings rtnl_unlock(); 285761da026dSBen Hutchings 2858874aeea5SJeff Kirsher return 0; 2859874aeea5SJeff Kirsher } 2860874aeea5SJeff Kirsher 2861874aeea5SJeff Kirsher static int efx_pm_thaw(struct device *dev) 2862874aeea5SJeff Kirsher { 2863874aeea5SJeff Kirsher struct efx_nic *efx = pci_get_drvdata(to_pci_dev(dev)); 2864874aeea5SJeff Kirsher 286561da026dSBen Hutchings rtnl_lock(); 286661da026dSBen Hutchings 28676032fb56SBen Hutchings if (efx->state != STATE_DISABLED) { 28687f967c01SBen Hutchings efx_start_interrupts(efx, false); 2869874aeea5SJeff Kirsher 2870874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 2871874aeea5SJeff Kirsher efx->phy_op->reconfigure(efx); 2872874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 2873874aeea5SJeff Kirsher 2874874aeea5SJeff Kirsher efx_start_all(efx); 2875874aeea5SJeff Kirsher 2876874aeea5SJeff Kirsher netif_device_attach(efx->net_dev); 2877874aeea5SJeff Kirsher 2878f16aeea0SBen Hutchings efx->state = STATE_READY; 2879874aeea5SJeff Kirsher 2880874aeea5SJeff Kirsher efx->type->resume_wol(efx); 28816032fb56SBen Hutchings } 2882874aeea5SJeff Kirsher 288361da026dSBen Hutchings rtnl_unlock(); 288461da026dSBen Hutchings 2885874aeea5SJeff Kirsher /* Reschedule any quenched resets scheduled during efx_pm_freeze() */ 2886874aeea5SJeff Kirsher queue_work(reset_workqueue, &efx->reset_work); 2887874aeea5SJeff Kirsher 2888874aeea5SJeff Kirsher return 0; 2889874aeea5SJeff Kirsher } 2890874aeea5SJeff Kirsher 2891874aeea5SJeff Kirsher static int efx_pm_poweroff(struct device *dev) 2892874aeea5SJeff Kirsher { 2893874aeea5SJeff Kirsher struct pci_dev *pci_dev = to_pci_dev(dev); 2894874aeea5SJeff Kirsher struct efx_nic *efx = pci_get_drvdata(pci_dev); 2895874aeea5SJeff Kirsher 2896874aeea5SJeff Kirsher efx->type->fini(efx); 2897874aeea5SJeff Kirsher 2898874aeea5SJeff Kirsher efx->reset_pending = 0; 2899874aeea5SJeff Kirsher 2900874aeea5SJeff Kirsher pci_save_state(pci_dev); 2901874aeea5SJeff Kirsher return pci_set_power_state(pci_dev, PCI_D3hot); 2902874aeea5SJeff Kirsher } 2903874aeea5SJeff Kirsher 2904874aeea5SJeff Kirsher /* Used for both resume and restore */ 2905874aeea5SJeff Kirsher static int efx_pm_resume(struct device *dev) 2906874aeea5SJeff Kirsher { 2907874aeea5SJeff Kirsher struct pci_dev *pci_dev = to_pci_dev(dev); 2908874aeea5SJeff Kirsher struct efx_nic *efx = pci_get_drvdata(pci_dev); 2909874aeea5SJeff Kirsher int rc; 2910874aeea5SJeff Kirsher 2911874aeea5SJeff Kirsher rc = pci_set_power_state(pci_dev, PCI_D0); 2912874aeea5SJeff Kirsher if (rc) 2913874aeea5SJeff Kirsher return rc; 2914874aeea5SJeff Kirsher pci_restore_state(pci_dev); 2915874aeea5SJeff Kirsher rc = pci_enable_device(pci_dev); 2916874aeea5SJeff Kirsher if (rc) 2917874aeea5SJeff Kirsher return rc; 2918874aeea5SJeff Kirsher pci_set_master(efx->pci_dev); 2919874aeea5SJeff Kirsher rc = efx->type->reset(efx, RESET_TYPE_ALL); 2920874aeea5SJeff Kirsher if (rc) 2921874aeea5SJeff Kirsher return rc; 2922874aeea5SJeff Kirsher rc = efx->type->init(efx); 2923874aeea5SJeff Kirsher if (rc) 2924874aeea5SJeff Kirsher return rc; 2925874aeea5SJeff Kirsher efx_pm_thaw(dev); 2926874aeea5SJeff Kirsher return 0; 2927874aeea5SJeff Kirsher } 2928874aeea5SJeff Kirsher 2929874aeea5SJeff Kirsher static int efx_pm_suspend(struct device *dev) 2930874aeea5SJeff Kirsher { 2931874aeea5SJeff Kirsher int rc; 2932874aeea5SJeff Kirsher 2933874aeea5SJeff Kirsher efx_pm_freeze(dev); 2934874aeea5SJeff Kirsher rc = efx_pm_poweroff(dev); 2935874aeea5SJeff Kirsher if (rc) 2936874aeea5SJeff Kirsher efx_pm_resume(dev); 2937874aeea5SJeff Kirsher return rc; 2938874aeea5SJeff Kirsher } 2939874aeea5SJeff Kirsher 294018e83e4cSBen Hutchings static const struct dev_pm_ops efx_pm_ops = { 2941874aeea5SJeff Kirsher .suspend = efx_pm_suspend, 2942874aeea5SJeff Kirsher .resume = efx_pm_resume, 2943874aeea5SJeff Kirsher .freeze = efx_pm_freeze, 2944874aeea5SJeff Kirsher .thaw = efx_pm_thaw, 2945874aeea5SJeff Kirsher .poweroff = efx_pm_poweroff, 2946874aeea5SJeff Kirsher .restore = efx_pm_resume, 2947874aeea5SJeff Kirsher }; 2948874aeea5SJeff Kirsher 2949626950dbSAlexandre Rames /* A PCI error affecting this device was detected. 2950626950dbSAlexandre Rames * At this point MMIO and DMA may be disabled. 2951626950dbSAlexandre Rames * Stop the software path and request a slot reset. 2952626950dbSAlexandre Rames */ 2953debd0034Sstephen hemminger static pci_ers_result_t efx_io_error_detected(struct pci_dev *pdev, 2954626950dbSAlexandre Rames enum pci_channel_state state) 2955626950dbSAlexandre Rames { 2956626950dbSAlexandre Rames pci_ers_result_t status = PCI_ERS_RESULT_RECOVERED; 2957626950dbSAlexandre Rames struct efx_nic *efx = pci_get_drvdata(pdev); 2958626950dbSAlexandre Rames 2959626950dbSAlexandre Rames if (state == pci_channel_io_perm_failure) 2960626950dbSAlexandre Rames return PCI_ERS_RESULT_DISCONNECT; 2961626950dbSAlexandre Rames 2962626950dbSAlexandre Rames rtnl_lock(); 2963626950dbSAlexandre Rames 2964626950dbSAlexandre Rames if (efx->state != STATE_DISABLED) { 2965626950dbSAlexandre Rames efx->state = STATE_RECOVERY; 2966626950dbSAlexandre Rames efx->reset_pending = 0; 2967626950dbSAlexandre Rames 2968626950dbSAlexandre Rames efx_device_detach_sync(efx); 2969626950dbSAlexandre Rames 2970626950dbSAlexandre Rames efx_stop_all(efx); 2971626950dbSAlexandre Rames efx_stop_interrupts(efx, false); 2972626950dbSAlexandre Rames 2973626950dbSAlexandre Rames status = PCI_ERS_RESULT_NEED_RESET; 2974626950dbSAlexandre Rames } else { 2975626950dbSAlexandre Rames /* If the interface is disabled we don't want to do anything 2976626950dbSAlexandre Rames * with it. 2977626950dbSAlexandre Rames */ 2978626950dbSAlexandre Rames status = PCI_ERS_RESULT_RECOVERED; 2979626950dbSAlexandre Rames } 2980626950dbSAlexandre Rames 2981626950dbSAlexandre Rames rtnl_unlock(); 2982626950dbSAlexandre Rames 2983626950dbSAlexandre Rames pci_disable_device(pdev); 2984626950dbSAlexandre Rames 2985626950dbSAlexandre Rames return status; 2986626950dbSAlexandre Rames } 2987626950dbSAlexandre Rames 2988626950dbSAlexandre Rames /* Fake a successfull reset, which will be performed later in efx_io_resume. */ 2989debd0034Sstephen hemminger static pci_ers_result_t efx_io_slot_reset(struct pci_dev *pdev) 2990626950dbSAlexandre Rames { 2991626950dbSAlexandre Rames struct efx_nic *efx = pci_get_drvdata(pdev); 2992626950dbSAlexandre Rames pci_ers_result_t status = PCI_ERS_RESULT_RECOVERED; 2993626950dbSAlexandre Rames int rc; 2994626950dbSAlexandre Rames 2995626950dbSAlexandre Rames if (pci_enable_device(pdev)) { 2996626950dbSAlexandre Rames netif_err(efx, hw, efx->net_dev, 2997626950dbSAlexandre Rames "Cannot re-enable PCI device after reset.\n"); 2998626950dbSAlexandre Rames status = PCI_ERS_RESULT_DISCONNECT; 2999626950dbSAlexandre Rames } 3000626950dbSAlexandre Rames 3001626950dbSAlexandre Rames rc = pci_cleanup_aer_uncorrect_error_status(pdev); 3002626950dbSAlexandre Rames if (rc) { 3003626950dbSAlexandre Rames netif_err(efx, hw, efx->net_dev, 3004626950dbSAlexandre Rames "pci_cleanup_aer_uncorrect_error_status failed (%d)\n", rc); 3005626950dbSAlexandre Rames /* Non-fatal error. Continue. */ 3006626950dbSAlexandre Rames } 3007626950dbSAlexandre Rames 3008626950dbSAlexandre Rames return status; 3009626950dbSAlexandre Rames } 3010626950dbSAlexandre Rames 3011626950dbSAlexandre Rames /* Perform the actual reset and resume I/O operations. */ 3012626950dbSAlexandre Rames static void efx_io_resume(struct pci_dev *pdev) 3013626950dbSAlexandre Rames { 3014626950dbSAlexandre Rames struct efx_nic *efx = pci_get_drvdata(pdev); 3015626950dbSAlexandre Rames int rc; 3016626950dbSAlexandre Rames 3017626950dbSAlexandre Rames rtnl_lock(); 3018626950dbSAlexandre Rames 3019626950dbSAlexandre Rames if (efx->state == STATE_DISABLED) 3020626950dbSAlexandre Rames goto out; 3021626950dbSAlexandre Rames 3022626950dbSAlexandre Rames rc = efx_reset(efx, RESET_TYPE_ALL); 3023626950dbSAlexandre Rames if (rc) { 3024626950dbSAlexandre Rames netif_err(efx, hw, efx->net_dev, 3025626950dbSAlexandre Rames "efx_reset failed after PCI error (%d)\n", rc); 3026626950dbSAlexandre Rames } else { 3027626950dbSAlexandre Rames efx->state = STATE_READY; 3028626950dbSAlexandre Rames netif_dbg(efx, hw, efx->net_dev, 3029626950dbSAlexandre Rames "Done resetting and resuming IO after PCI error.\n"); 3030626950dbSAlexandre Rames } 3031626950dbSAlexandre Rames 3032626950dbSAlexandre Rames out: 3033626950dbSAlexandre Rames rtnl_unlock(); 3034626950dbSAlexandre Rames } 3035626950dbSAlexandre Rames 3036626950dbSAlexandre Rames /* For simplicity and reliability, we always require a slot reset and try to 3037626950dbSAlexandre Rames * reset the hardware when a pci error affecting the device is detected. 3038626950dbSAlexandre Rames * We leave both the link_reset and mmio_enabled callback unimplemented: 3039626950dbSAlexandre Rames * with our request for slot reset the mmio_enabled callback will never be 3040626950dbSAlexandre Rames * called, and the link_reset callback is not used by AER or EEH mechanisms. 3041626950dbSAlexandre Rames */ 3042626950dbSAlexandre Rames static struct pci_error_handlers efx_err_handlers = { 3043626950dbSAlexandre Rames .error_detected = efx_io_error_detected, 3044626950dbSAlexandre Rames .slot_reset = efx_io_slot_reset, 3045626950dbSAlexandre Rames .resume = efx_io_resume, 3046626950dbSAlexandre Rames }; 3047626950dbSAlexandre Rames 3048874aeea5SJeff Kirsher static struct pci_driver efx_pci_driver = { 3049874aeea5SJeff Kirsher .name = KBUILD_MODNAME, 3050874aeea5SJeff Kirsher .id_table = efx_pci_table, 3051874aeea5SJeff Kirsher .probe = efx_pci_probe, 3052874aeea5SJeff Kirsher .remove = efx_pci_remove, 3053874aeea5SJeff Kirsher .driver.pm = &efx_pm_ops, 3054626950dbSAlexandre Rames .err_handler = &efx_err_handlers, 3055874aeea5SJeff Kirsher }; 3056874aeea5SJeff Kirsher 3057874aeea5SJeff Kirsher /************************************************************************** 3058874aeea5SJeff Kirsher * 3059874aeea5SJeff Kirsher * Kernel module interface 3060874aeea5SJeff Kirsher * 3061874aeea5SJeff Kirsher *************************************************************************/ 3062874aeea5SJeff Kirsher 3063874aeea5SJeff Kirsher module_param(interrupt_mode, uint, 0444); 3064874aeea5SJeff Kirsher MODULE_PARM_DESC(interrupt_mode, 3065874aeea5SJeff Kirsher "Interrupt mode (0=>MSIX 1=>MSI 2=>legacy)"); 3066874aeea5SJeff Kirsher 3067874aeea5SJeff Kirsher static int __init efx_init_module(void) 3068874aeea5SJeff Kirsher { 3069874aeea5SJeff Kirsher int rc; 3070874aeea5SJeff Kirsher 3071874aeea5SJeff Kirsher printk(KERN_INFO "Solarflare NET driver v" EFX_DRIVER_VERSION "\n"); 3072874aeea5SJeff Kirsher 3073874aeea5SJeff Kirsher rc = register_netdevice_notifier(&efx_netdev_notifier); 3074874aeea5SJeff Kirsher if (rc) 3075874aeea5SJeff Kirsher goto err_notifier; 3076874aeea5SJeff Kirsher 3077cd2d5b52SBen Hutchings rc = efx_init_sriov(); 3078cd2d5b52SBen Hutchings if (rc) 3079cd2d5b52SBen Hutchings goto err_sriov; 3080cd2d5b52SBen Hutchings 3081874aeea5SJeff Kirsher reset_workqueue = create_singlethread_workqueue("sfc_reset"); 3082874aeea5SJeff Kirsher if (!reset_workqueue) { 3083874aeea5SJeff Kirsher rc = -ENOMEM; 3084874aeea5SJeff Kirsher goto err_reset; 3085874aeea5SJeff Kirsher } 3086874aeea5SJeff Kirsher 3087874aeea5SJeff Kirsher rc = pci_register_driver(&efx_pci_driver); 3088874aeea5SJeff Kirsher if (rc < 0) 3089874aeea5SJeff Kirsher goto err_pci; 3090874aeea5SJeff Kirsher 3091874aeea5SJeff Kirsher return 0; 3092874aeea5SJeff Kirsher 3093874aeea5SJeff Kirsher err_pci: 3094874aeea5SJeff Kirsher destroy_workqueue(reset_workqueue); 3095874aeea5SJeff Kirsher err_reset: 3096cd2d5b52SBen Hutchings efx_fini_sriov(); 3097cd2d5b52SBen Hutchings err_sriov: 3098874aeea5SJeff Kirsher unregister_netdevice_notifier(&efx_netdev_notifier); 3099874aeea5SJeff Kirsher err_notifier: 3100874aeea5SJeff Kirsher return rc; 3101874aeea5SJeff Kirsher } 3102874aeea5SJeff Kirsher 3103874aeea5SJeff Kirsher static void __exit efx_exit_module(void) 3104874aeea5SJeff Kirsher { 3105874aeea5SJeff Kirsher printk(KERN_INFO "Solarflare NET driver unloading\n"); 3106874aeea5SJeff Kirsher 3107874aeea5SJeff Kirsher pci_unregister_driver(&efx_pci_driver); 3108874aeea5SJeff Kirsher destroy_workqueue(reset_workqueue); 3109cd2d5b52SBen Hutchings efx_fini_sriov(); 3110874aeea5SJeff Kirsher unregister_netdevice_notifier(&efx_netdev_notifier); 3111874aeea5SJeff Kirsher 3112874aeea5SJeff Kirsher } 3113874aeea5SJeff Kirsher 3114874aeea5SJeff Kirsher module_init(efx_init_module); 3115874aeea5SJeff Kirsher module_exit(efx_exit_module); 3116874aeea5SJeff Kirsher 3117874aeea5SJeff Kirsher MODULE_AUTHOR("Solarflare Communications and " 3118874aeea5SJeff Kirsher "Michael Brown <mbrown@fensystems.co.uk>"); 3119874aeea5SJeff Kirsher MODULE_DESCRIPTION("Solarflare Communications network driver"); 3120874aeea5SJeff Kirsher MODULE_LICENSE("GPL"); 3121874aeea5SJeff Kirsher MODULE_DEVICE_TABLE(pci, efx_pci_table); 3122