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> 25874aeea5SJeff Kirsher #include "net_driver.h" 26874aeea5SJeff Kirsher #include "efx.h" 27874aeea5SJeff Kirsher #include "nic.h" 28874aeea5SJeff Kirsher 29874aeea5SJeff Kirsher #include "mcdi.h" 30874aeea5SJeff Kirsher #include "workarounds.h" 31874aeea5SJeff Kirsher 32874aeea5SJeff Kirsher /************************************************************************** 33874aeea5SJeff Kirsher * 34874aeea5SJeff Kirsher * Type name strings 35874aeea5SJeff Kirsher * 36874aeea5SJeff Kirsher ************************************************************************** 37874aeea5SJeff Kirsher */ 38874aeea5SJeff Kirsher 39874aeea5SJeff Kirsher /* Loopback mode names (see LOOPBACK_MODE()) */ 40874aeea5SJeff Kirsher const unsigned int efx_loopback_mode_max = LOOPBACK_MAX; 4118e83e4cSBen Hutchings const char *const efx_loopback_mode_names[] = { 42874aeea5SJeff Kirsher [LOOPBACK_NONE] = "NONE", 43874aeea5SJeff Kirsher [LOOPBACK_DATA] = "DATAPATH", 44874aeea5SJeff Kirsher [LOOPBACK_GMAC] = "GMAC", 45874aeea5SJeff Kirsher [LOOPBACK_XGMII] = "XGMII", 46874aeea5SJeff Kirsher [LOOPBACK_XGXS] = "XGXS", 47874aeea5SJeff Kirsher [LOOPBACK_XAUI] = "XAUI", 48874aeea5SJeff Kirsher [LOOPBACK_GMII] = "GMII", 49874aeea5SJeff Kirsher [LOOPBACK_SGMII] = "SGMII", 50874aeea5SJeff Kirsher [LOOPBACK_XGBR] = "XGBR", 51874aeea5SJeff Kirsher [LOOPBACK_XFI] = "XFI", 52874aeea5SJeff Kirsher [LOOPBACK_XAUI_FAR] = "XAUI_FAR", 53874aeea5SJeff Kirsher [LOOPBACK_GMII_FAR] = "GMII_FAR", 54874aeea5SJeff Kirsher [LOOPBACK_SGMII_FAR] = "SGMII_FAR", 55874aeea5SJeff Kirsher [LOOPBACK_XFI_FAR] = "XFI_FAR", 56874aeea5SJeff Kirsher [LOOPBACK_GPHY] = "GPHY", 57874aeea5SJeff Kirsher [LOOPBACK_PHYXS] = "PHYXS", 58874aeea5SJeff Kirsher [LOOPBACK_PCS] = "PCS", 59874aeea5SJeff Kirsher [LOOPBACK_PMAPMD] = "PMA/PMD", 60874aeea5SJeff Kirsher [LOOPBACK_XPORT] = "XPORT", 61874aeea5SJeff Kirsher [LOOPBACK_XGMII_WS] = "XGMII_WS", 62874aeea5SJeff Kirsher [LOOPBACK_XAUI_WS] = "XAUI_WS", 63874aeea5SJeff Kirsher [LOOPBACK_XAUI_WS_FAR] = "XAUI_WS_FAR", 64874aeea5SJeff Kirsher [LOOPBACK_XAUI_WS_NEAR] = "XAUI_WS_NEAR", 65874aeea5SJeff Kirsher [LOOPBACK_GMII_WS] = "GMII_WS", 66874aeea5SJeff Kirsher [LOOPBACK_XFI_WS] = "XFI_WS", 67874aeea5SJeff Kirsher [LOOPBACK_XFI_WS_FAR] = "XFI_WS_FAR", 68874aeea5SJeff Kirsher [LOOPBACK_PHYXS_WS] = "PHYXS_WS", 69874aeea5SJeff Kirsher }; 70874aeea5SJeff Kirsher 71874aeea5SJeff Kirsher const unsigned int efx_reset_type_max = RESET_TYPE_MAX; 7218e83e4cSBen Hutchings const char *const efx_reset_type_names[] = { 73874aeea5SJeff Kirsher [RESET_TYPE_INVISIBLE] = "INVISIBLE", 74874aeea5SJeff Kirsher [RESET_TYPE_ALL] = "ALL", 75874aeea5SJeff Kirsher [RESET_TYPE_WORLD] = "WORLD", 76874aeea5SJeff Kirsher [RESET_TYPE_DISABLE] = "DISABLE", 77874aeea5SJeff Kirsher [RESET_TYPE_TX_WATCHDOG] = "TX_WATCHDOG", 78874aeea5SJeff Kirsher [RESET_TYPE_INT_ERROR] = "INT_ERROR", 79874aeea5SJeff Kirsher [RESET_TYPE_RX_RECOVERY] = "RX_RECOVERY", 80874aeea5SJeff Kirsher [RESET_TYPE_RX_DESC_FETCH] = "RX_DESC_FETCH", 81874aeea5SJeff Kirsher [RESET_TYPE_TX_DESC_FETCH] = "TX_DESC_FETCH", 82874aeea5SJeff Kirsher [RESET_TYPE_TX_SKIP] = "TX_SKIP", 83874aeea5SJeff Kirsher [RESET_TYPE_MC_FAILURE] = "MC_FAILURE", 84874aeea5SJeff Kirsher }; 85874aeea5SJeff Kirsher 86874aeea5SJeff Kirsher #define EFX_MAX_MTU (9 * 1024) 87874aeea5SJeff Kirsher 88874aeea5SJeff Kirsher /* Reset workqueue. If any NIC has a hardware failure then a reset will be 89874aeea5SJeff Kirsher * queued onto this work queue. This is not a per-nic work queue, because 90874aeea5SJeff Kirsher * efx_reset_work() acquires the rtnl lock, so resets are naturally serialised. 91874aeea5SJeff Kirsher */ 92874aeea5SJeff Kirsher static struct workqueue_struct *reset_workqueue; 93874aeea5SJeff Kirsher 94874aeea5SJeff Kirsher /************************************************************************** 95874aeea5SJeff Kirsher * 96874aeea5SJeff Kirsher * Configurable values 97874aeea5SJeff Kirsher * 98874aeea5SJeff Kirsher *************************************************************************/ 99874aeea5SJeff Kirsher 100874aeea5SJeff Kirsher /* 101874aeea5SJeff Kirsher * Use separate channels for TX and RX events 102874aeea5SJeff Kirsher * 103874aeea5SJeff Kirsher * Set this to 1 to use separate channels for TX and RX. It allows us 104874aeea5SJeff Kirsher * to control interrupt affinity separately for TX and RX. 105874aeea5SJeff Kirsher * 106874aeea5SJeff Kirsher * This is only used in MSI-X interrupt mode 107874aeea5SJeff Kirsher */ 108874aeea5SJeff Kirsher static unsigned int separate_tx_channels; 109874aeea5SJeff Kirsher module_param(separate_tx_channels, uint, 0444); 110874aeea5SJeff Kirsher MODULE_PARM_DESC(separate_tx_channels, 111874aeea5SJeff Kirsher "Use separate channels for TX and RX"); 112874aeea5SJeff Kirsher 113874aeea5SJeff Kirsher /* This is the weight assigned to each of the (per-channel) virtual 114874aeea5SJeff Kirsher * NAPI devices. 115874aeea5SJeff Kirsher */ 116874aeea5SJeff Kirsher static int napi_weight = 64; 117874aeea5SJeff Kirsher 118874aeea5SJeff Kirsher /* This is the time (in jiffies) between invocations of the hardware 119874aeea5SJeff Kirsher * monitor. On Falcon-based NICs, this will: 120874aeea5SJeff Kirsher * - Check the on-board hardware monitor; 121874aeea5SJeff Kirsher * - Poll the link state and reconfigure the hardware as necessary. 122874aeea5SJeff Kirsher */ 123874aeea5SJeff Kirsher static unsigned int efx_monitor_interval = 1 * HZ; 124874aeea5SJeff Kirsher 125874aeea5SJeff Kirsher /* Initial interrupt moderation settings. They can be modified after 126874aeea5SJeff Kirsher * module load with ethtool. 127874aeea5SJeff Kirsher * 128874aeea5SJeff Kirsher * The default for RX should strike a balance between increasing the 129874aeea5SJeff Kirsher * round-trip latency and reducing overhead. 130874aeea5SJeff Kirsher */ 131874aeea5SJeff Kirsher static unsigned int rx_irq_mod_usec = 60; 132874aeea5SJeff Kirsher 133874aeea5SJeff Kirsher /* Initial interrupt moderation settings. They can be modified after 134874aeea5SJeff Kirsher * module load with ethtool. 135874aeea5SJeff Kirsher * 136874aeea5SJeff Kirsher * This default is chosen to ensure that a 10G link does not go idle 137874aeea5SJeff Kirsher * while a TX queue is stopped after it has become full. A queue is 138874aeea5SJeff Kirsher * restarted when it drops below half full. The time this takes (assuming 139874aeea5SJeff Kirsher * worst case 3 descriptors per packet and 1024 descriptors) is 140874aeea5SJeff Kirsher * 512 / 3 * 1.2 = 205 usec. 141874aeea5SJeff Kirsher */ 142874aeea5SJeff Kirsher static unsigned int tx_irq_mod_usec = 150; 143874aeea5SJeff Kirsher 144874aeea5SJeff Kirsher /* This is the first interrupt mode to try out of: 145874aeea5SJeff Kirsher * 0 => MSI-X 146874aeea5SJeff Kirsher * 1 => MSI 147874aeea5SJeff Kirsher * 2 => legacy 148874aeea5SJeff Kirsher */ 149874aeea5SJeff Kirsher static unsigned int interrupt_mode; 150874aeea5SJeff Kirsher 151874aeea5SJeff Kirsher /* This is the requested number of CPUs to use for Receive-Side Scaling (RSS), 152874aeea5SJeff Kirsher * i.e. the number of CPUs among which we may distribute simultaneous 153874aeea5SJeff Kirsher * interrupt handling. 154874aeea5SJeff Kirsher * 155874aeea5SJeff Kirsher * Cards without MSI-X will only target one CPU via legacy or MSI interrupt. 156cdb08f8fSBen Hutchings * The default (0) means to assign an interrupt to each core. 157874aeea5SJeff Kirsher */ 158874aeea5SJeff Kirsher static unsigned int rss_cpus; 159874aeea5SJeff Kirsher module_param(rss_cpus, uint, 0444); 160874aeea5SJeff Kirsher MODULE_PARM_DESC(rss_cpus, "Number of CPUs to use for Receive-Side Scaling"); 161874aeea5SJeff Kirsher 162874aeea5SJeff Kirsher static int phy_flash_cfg; 163874aeea5SJeff Kirsher module_param(phy_flash_cfg, int, 0644); 164874aeea5SJeff Kirsher MODULE_PARM_DESC(phy_flash_cfg, "Set PHYs into reflash mode initially"); 165874aeea5SJeff Kirsher 166874aeea5SJeff Kirsher static unsigned irq_adapt_low_thresh = 10000; 167874aeea5SJeff Kirsher module_param(irq_adapt_low_thresh, uint, 0644); 168874aeea5SJeff Kirsher MODULE_PARM_DESC(irq_adapt_low_thresh, 169874aeea5SJeff Kirsher "Threshold score for reducing IRQ moderation"); 170874aeea5SJeff Kirsher 171874aeea5SJeff Kirsher static unsigned irq_adapt_high_thresh = 20000; 172874aeea5SJeff Kirsher module_param(irq_adapt_high_thresh, uint, 0644); 173874aeea5SJeff Kirsher MODULE_PARM_DESC(irq_adapt_high_thresh, 174874aeea5SJeff Kirsher "Threshold score for increasing IRQ moderation"); 175874aeea5SJeff Kirsher 176874aeea5SJeff Kirsher static unsigned debug = (NETIF_MSG_DRV | NETIF_MSG_PROBE | 177874aeea5SJeff Kirsher NETIF_MSG_LINK | NETIF_MSG_IFDOWN | 178874aeea5SJeff Kirsher NETIF_MSG_IFUP | NETIF_MSG_RX_ERR | 179874aeea5SJeff Kirsher NETIF_MSG_TX_ERR | NETIF_MSG_HW); 180874aeea5SJeff Kirsher module_param(debug, uint, 0); 181874aeea5SJeff Kirsher MODULE_PARM_DESC(debug, "Bitmapped debugging message enable value"); 182874aeea5SJeff Kirsher 183874aeea5SJeff Kirsher /************************************************************************** 184874aeea5SJeff Kirsher * 185874aeea5SJeff Kirsher * Utility functions and prototypes 186874aeea5SJeff Kirsher * 187874aeea5SJeff Kirsher *************************************************************************/ 188874aeea5SJeff Kirsher 1899f2cb71cSBen Hutchings static void efx_start_interrupts(struct efx_nic *efx); 1909f2cb71cSBen Hutchings static void efx_stop_interrupts(struct efx_nic *efx); 191874aeea5SJeff Kirsher static void efx_remove_channels(struct efx_nic *efx); 192874aeea5SJeff Kirsher static void efx_remove_port(struct efx_nic *efx); 193874aeea5SJeff Kirsher static void efx_init_napi(struct efx_nic *efx); 194874aeea5SJeff Kirsher static void efx_fini_napi(struct efx_nic *efx); 195874aeea5SJeff Kirsher static void efx_fini_napi_channel(struct efx_channel *channel); 196874aeea5SJeff Kirsher static void efx_fini_struct(struct efx_nic *efx); 197874aeea5SJeff Kirsher static void efx_start_all(struct efx_nic *efx); 198874aeea5SJeff Kirsher static void efx_stop_all(struct efx_nic *efx); 199874aeea5SJeff Kirsher 200874aeea5SJeff Kirsher #define EFX_ASSERT_RESET_SERIALISED(efx) \ 201874aeea5SJeff Kirsher do { \ 202874aeea5SJeff Kirsher if ((efx->state == STATE_RUNNING) || \ 203874aeea5SJeff Kirsher (efx->state == STATE_DISABLED)) \ 204874aeea5SJeff Kirsher ASSERT_RTNL(); \ 205874aeea5SJeff Kirsher } while (0) 206874aeea5SJeff Kirsher 207874aeea5SJeff Kirsher /************************************************************************** 208874aeea5SJeff Kirsher * 209874aeea5SJeff Kirsher * Event queue processing 210874aeea5SJeff Kirsher * 211874aeea5SJeff Kirsher *************************************************************************/ 212874aeea5SJeff Kirsher 213874aeea5SJeff Kirsher /* Process channel's event queue 214874aeea5SJeff Kirsher * 215874aeea5SJeff Kirsher * This function is responsible for processing the event queue of a 216874aeea5SJeff Kirsher * single channel. The caller must guarantee that this function will 217874aeea5SJeff Kirsher * never be concurrently called more than once on the same channel, 218874aeea5SJeff Kirsher * though different channels may be being processed concurrently. 219874aeea5SJeff Kirsher */ 220874aeea5SJeff Kirsher static int efx_process_channel(struct efx_channel *channel, int budget) 221874aeea5SJeff Kirsher { 222874aeea5SJeff Kirsher int spent; 223874aeea5SJeff Kirsher 2249f2cb71cSBen Hutchings if (unlikely(!channel->enabled)) 225874aeea5SJeff Kirsher return 0; 226874aeea5SJeff Kirsher 227874aeea5SJeff Kirsher spent = efx_nic_process_eventq(channel, budget); 228d9ab7007SBen Hutchings if (spent && efx_channel_has_rx_queue(channel)) { 229d9ab7007SBen Hutchings struct efx_rx_queue *rx_queue = 230d9ab7007SBen Hutchings efx_channel_get_rx_queue(channel); 231874aeea5SJeff Kirsher 232874aeea5SJeff Kirsher /* Deliver last RX packet. */ 233874aeea5SJeff Kirsher if (channel->rx_pkt) { 234db339569SBen Hutchings __efx_rx_packet(channel, channel->rx_pkt); 235874aeea5SJeff Kirsher channel->rx_pkt = NULL; 236874aeea5SJeff Kirsher } 2379f2cb71cSBen Hutchings if (rx_queue->enabled) { 238874aeea5SJeff Kirsher efx_rx_strategy(channel); 239d9ab7007SBen Hutchings efx_fast_push_rx_descriptors(rx_queue); 240d9ab7007SBen Hutchings } 2419f2cb71cSBen Hutchings } 242874aeea5SJeff Kirsher 243874aeea5SJeff Kirsher return spent; 244874aeea5SJeff Kirsher } 245874aeea5SJeff Kirsher 246874aeea5SJeff Kirsher /* Mark channel as finished processing 247874aeea5SJeff Kirsher * 248874aeea5SJeff Kirsher * Note that since we will not receive further interrupts for this 249874aeea5SJeff Kirsher * channel before we finish processing and call the eventq_read_ack() 250874aeea5SJeff Kirsher * method, there is no need to use the interrupt hold-off timers. 251874aeea5SJeff Kirsher */ 252874aeea5SJeff Kirsher static inline void efx_channel_processed(struct efx_channel *channel) 253874aeea5SJeff Kirsher { 254874aeea5SJeff Kirsher /* The interrupt handler for this channel may set work_pending 255874aeea5SJeff Kirsher * as soon as we acknowledge the events we've seen. Make sure 256874aeea5SJeff Kirsher * it's cleared before then. */ 257874aeea5SJeff Kirsher channel->work_pending = false; 258874aeea5SJeff Kirsher smp_wmb(); 259874aeea5SJeff Kirsher 260874aeea5SJeff Kirsher efx_nic_eventq_read_ack(channel); 261874aeea5SJeff Kirsher } 262874aeea5SJeff Kirsher 263874aeea5SJeff Kirsher /* NAPI poll handler 264874aeea5SJeff Kirsher * 265874aeea5SJeff Kirsher * NAPI guarantees serialisation of polls of the same device, which 266874aeea5SJeff Kirsher * provides the guarantee required by efx_process_channel(). 267874aeea5SJeff Kirsher */ 268874aeea5SJeff Kirsher static int efx_poll(struct napi_struct *napi, int budget) 269874aeea5SJeff Kirsher { 270874aeea5SJeff Kirsher struct efx_channel *channel = 271874aeea5SJeff Kirsher container_of(napi, struct efx_channel, napi_str); 272874aeea5SJeff Kirsher struct efx_nic *efx = channel->efx; 273874aeea5SJeff Kirsher int spent; 274874aeea5SJeff Kirsher 275874aeea5SJeff Kirsher netif_vdbg(efx, intr, efx->net_dev, 276874aeea5SJeff Kirsher "channel %d NAPI poll executing on CPU %d\n", 277874aeea5SJeff Kirsher channel->channel, raw_smp_processor_id()); 278874aeea5SJeff Kirsher 279874aeea5SJeff Kirsher spent = efx_process_channel(channel, budget); 280874aeea5SJeff Kirsher 281874aeea5SJeff Kirsher if (spent < budget) { 2829d9a6973SBen Hutchings if (efx_channel_has_rx_queue(channel) && 283874aeea5SJeff Kirsher efx->irq_rx_adaptive && 284874aeea5SJeff Kirsher unlikely(++channel->irq_count == 1000)) { 285874aeea5SJeff Kirsher if (unlikely(channel->irq_mod_score < 286874aeea5SJeff Kirsher irq_adapt_low_thresh)) { 287874aeea5SJeff Kirsher if (channel->irq_moderation > 1) { 288874aeea5SJeff Kirsher channel->irq_moderation -= 1; 289874aeea5SJeff Kirsher efx->type->push_irq_moderation(channel); 290874aeea5SJeff Kirsher } 291874aeea5SJeff Kirsher } else if (unlikely(channel->irq_mod_score > 292874aeea5SJeff Kirsher irq_adapt_high_thresh)) { 293874aeea5SJeff Kirsher if (channel->irq_moderation < 294874aeea5SJeff Kirsher efx->irq_rx_moderation) { 295874aeea5SJeff Kirsher channel->irq_moderation += 1; 296874aeea5SJeff Kirsher efx->type->push_irq_moderation(channel); 297874aeea5SJeff Kirsher } 298874aeea5SJeff Kirsher } 299874aeea5SJeff Kirsher channel->irq_count = 0; 300874aeea5SJeff Kirsher channel->irq_mod_score = 0; 301874aeea5SJeff Kirsher } 302874aeea5SJeff Kirsher 303874aeea5SJeff Kirsher efx_filter_rfs_expire(channel); 304874aeea5SJeff Kirsher 305874aeea5SJeff Kirsher /* There is no race here; although napi_disable() will 306874aeea5SJeff Kirsher * only wait for napi_complete(), this isn't a problem 307874aeea5SJeff Kirsher * since efx_channel_processed() will have no effect if 308874aeea5SJeff Kirsher * interrupts have already been disabled. 309874aeea5SJeff Kirsher */ 310874aeea5SJeff Kirsher napi_complete(napi); 311874aeea5SJeff Kirsher efx_channel_processed(channel); 312874aeea5SJeff Kirsher } 313874aeea5SJeff Kirsher 314874aeea5SJeff Kirsher return spent; 315874aeea5SJeff Kirsher } 316874aeea5SJeff Kirsher 317874aeea5SJeff Kirsher /* Process the eventq of the specified channel immediately on this CPU 318874aeea5SJeff Kirsher * 319874aeea5SJeff Kirsher * Disable hardware generated interrupts, wait for any existing 320874aeea5SJeff Kirsher * processing to finish, then directly poll (and ack ) the eventq. 321874aeea5SJeff Kirsher * Finally reenable NAPI and interrupts. 322874aeea5SJeff Kirsher * 323874aeea5SJeff Kirsher * This is for use only during a loopback self-test. It must not 324874aeea5SJeff Kirsher * deliver any packets up the stack as this can result in deadlock. 325874aeea5SJeff Kirsher */ 326874aeea5SJeff Kirsher void efx_process_channel_now(struct efx_channel *channel) 327874aeea5SJeff Kirsher { 328874aeea5SJeff Kirsher struct efx_nic *efx = channel->efx; 329874aeea5SJeff Kirsher 330874aeea5SJeff Kirsher BUG_ON(channel->channel >= efx->n_channels); 331874aeea5SJeff Kirsher BUG_ON(!channel->enabled); 332874aeea5SJeff Kirsher BUG_ON(!efx->loopback_selftest); 333874aeea5SJeff Kirsher 334874aeea5SJeff Kirsher /* Disable interrupts and wait for ISRs to complete */ 335874aeea5SJeff Kirsher efx_nic_disable_interrupts(efx); 336874aeea5SJeff Kirsher if (efx->legacy_irq) { 337874aeea5SJeff Kirsher synchronize_irq(efx->legacy_irq); 338874aeea5SJeff Kirsher efx->legacy_irq_enabled = false; 339874aeea5SJeff Kirsher } 340874aeea5SJeff Kirsher if (channel->irq) 341874aeea5SJeff Kirsher synchronize_irq(channel->irq); 342874aeea5SJeff Kirsher 343874aeea5SJeff Kirsher /* Wait for any NAPI processing to complete */ 344874aeea5SJeff Kirsher napi_disable(&channel->napi_str); 345874aeea5SJeff Kirsher 346874aeea5SJeff Kirsher /* Poll the channel */ 347874aeea5SJeff Kirsher efx_process_channel(channel, channel->eventq_mask + 1); 348874aeea5SJeff Kirsher 349874aeea5SJeff Kirsher /* Ack the eventq. This may cause an interrupt to be generated 350874aeea5SJeff Kirsher * when they are reenabled */ 351874aeea5SJeff Kirsher efx_channel_processed(channel); 352874aeea5SJeff Kirsher 353874aeea5SJeff Kirsher napi_enable(&channel->napi_str); 354874aeea5SJeff Kirsher if (efx->legacy_irq) 355874aeea5SJeff Kirsher efx->legacy_irq_enabled = true; 356874aeea5SJeff Kirsher efx_nic_enable_interrupts(efx); 357874aeea5SJeff Kirsher } 358874aeea5SJeff Kirsher 359874aeea5SJeff Kirsher /* Create event queue 360874aeea5SJeff Kirsher * Event queue memory allocations are done only once. If the channel 361874aeea5SJeff Kirsher * is reset, the memory buffer will be reused; this guards against 362874aeea5SJeff Kirsher * errors during channel reset and also simplifies interrupt handling. 363874aeea5SJeff Kirsher */ 364874aeea5SJeff Kirsher static int efx_probe_eventq(struct efx_channel *channel) 365874aeea5SJeff Kirsher { 366874aeea5SJeff Kirsher struct efx_nic *efx = channel->efx; 367874aeea5SJeff Kirsher unsigned long entries; 368874aeea5SJeff Kirsher 36986ee5302SBen Hutchings netif_dbg(efx, probe, efx->net_dev, 370874aeea5SJeff Kirsher "chan %d create event queue\n", channel->channel); 371874aeea5SJeff Kirsher 372874aeea5SJeff Kirsher /* Build an event queue with room for one event per tx and rx buffer, 373874aeea5SJeff Kirsher * plus some extra for link state events and MCDI completions. */ 374874aeea5SJeff Kirsher entries = roundup_pow_of_two(efx->rxq_entries + efx->txq_entries + 128); 375874aeea5SJeff Kirsher EFX_BUG_ON_PARANOID(entries > EFX_MAX_EVQ_SIZE); 376874aeea5SJeff Kirsher channel->eventq_mask = max(entries, EFX_MIN_EVQ_SIZE) - 1; 377874aeea5SJeff Kirsher 378874aeea5SJeff Kirsher return efx_nic_probe_eventq(channel); 379874aeea5SJeff Kirsher } 380874aeea5SJeff Kirsher 381874aeea5SJeff Kirsher /* Prepare channel's event queue */ 382874aeea5SJeff Kirsher static void efx_init_eventq(struct efx_channel *channel) 383874aeea5SJeff Kirsher { 384874aeea5SJeff Kirsher netif_dbg(channel->efx, drv, channel->efx->net_dev, 385874aeea5SJeff Kirsher "chan %d init event queue\n", channel->channel); 386874aeea5SJeff Kirsher 387874aeea5SJeff Kirsher channel->eventq_read_ptr = 0; 388874aeea5SJeff Kirsher 389874aeea5SJeff Kirsher efx_nic_init_eventq(channel); 390874aeea5SJeff Kirsher } 391874aeea5SJeff Kirsher 3929f2cb71cSBen Hutchings /* Enable event queue processing and NAPI */ 3939f2cb71cSBen Hutchings static void efx_start_eventq(struct efx_channel *channel) 3949f2cb71cSBen Hutchings { 3959f2cb71cSBen Hutchings netif_dbg(channel->efx, ifup, channel->efx->net_dev, 3969f2cb71cSBen Hutchings "chan %d start event queue\n", channel->channel); 3979f2cb71cSBen Hutchings 3989f2cb71cSBen Hutchings /* The interrupt handler for this channel may set work_pending 3999f2cb71cSBen Hutchings * as soon as we enable it. Make sure it's cleared before 4009f2cb71cSBen Hutchings * then. Similarly, make sure it sees the enabled flag set. 4019f2cb71cSBen Hutchings */ 4029f2cb71cSBen Hutchings channel->work_pending = false; 4039f2cb71cSBen Hutchings channel->enabled = true; 4049f2cb71cSBen Hutchings smp_wmb(); 4059f2cb71cSBen Hutchings 4069f2cb71cSBen Hutchings napi_enable(&channel->napi_str); 4079f2cb71cSBen Hutchings efx_nic_eventq_read_ack(channel); 4089f2cb71cSBen Hutchings } 4099f2cb71cSBen Hutchings 4109f2cb71cSBen Hutchings /* Disable event queue processing and NAPI */ 4119f2cb71cSBen Hutchings static void efx_stop_eventq(struct efx_channel *channel) 4129f2cb71cSBen Hutchings { 4139f2cb71cSBen Hutchings if (!channel->enabled) 4149f2cb71cSBen Hutchings return; 4159f2cb71cSBen Hutchings 4169f2cb71cSBen Hutchings napi_disable(&channel->napi_str); 4179f2cb71cSBen Hutchings channel->enabled = false; 4189f2cb71cSBen Hutchings } 4199f2cb71cSBen Hutchings 420874aeea5SJeff Kirsher static void efx_fini_eventq(struct efx_channel *channel) 421874aeea5SJeff Kirsher { 422874aeea5SJeff Kirsher netif_dbg(channel->efx, drv, channel->efx->net_dev, 423874aeea5SJeff Kirsher "chan %d fini event queue\n", channel->channel); 424874aeea5SJeff Kirsher 425874aeea5SJeff Kirsher efx_nic_fini_eventq(channel); 426874aeea5SJeff Kirsher } 427874aeea5SJeff Kirsher 428874aeea5SJeff Kirsher static void efx_remove_eventq(struct efx_channel *channel) 429874aeea5SJeff Kirsher { 430874aeea5SJeff Kirsher netif_dbg(channel->efx, drv, channel->efx->net_dev, 431874aeea5SJeff Kirsher "chan %d remove event queue\n", channel->channel); 432874aeea5SJeff Kirsher 433874aeea5SJeff Kirsher efx_nic_remove_eventq(channel); 434874aeea5SJeff Kirsher } 435874aeea5SJeff Kirsher 436874aeea5SJeff Kirsher /************************************************************************** 437874aeea5SJeff Kirsher * 438874aeea5SJeff Kirsher * Channel handling 439874aeea5SJeff Kirsher * 440874aeea5SJeff Kirsher *************************************************************************/ 441874aeea5SJeff Kirsher 442874aeea5SJeff Kirsher /* Allocate and initialise a channel structure, optionally copying 443874aeea5SJeff Kirsher * parameters (but not resources) from an old channel structure. */ 444874aeea5SJeff Kirsher static struct efx_channel * 445874aeea5SJeff Kirsher efx_alloc_channel(struct efx_nic *efx, int i, struct efx_channel *old_channel) 446874aeea5SJeff Kirsher { 447874aeea5SJeff Kirsher struct efx_channel *channel; 448874aeea5SJeff Kirsher struct efx_rx_queue *rx_queue; 449874aeea5SJeff Kirsher struct efx_tx_queue *tx_queue; 450874aeea5SJeff Kirsher int j; 451874aeea5SJeff Kirsher 452874aeea5SJeff Kirsher if (old_channel) { 453874aeea5SJeff Kirsher channel = kmalloc(sizeof(*channel), GFP_KERNEL); 454874aeea5SJeff Kirsher if (!channel) 455874aeea5SJeff Kirsher return NULL; 456874aeea5SJeff Kirsher 457874aeea5SJeff Kirsher *channel = *old_channel; 458874aeea5SJeff Kirsher 459874aeea5SJeff Kirsher channel->napi_dev = NULL; 460874aeea5SJeff Kirsher memset(&channel->eventq, 0, sizeof(channel->eventq)); 461874aeea5SJeff Kirsher 462874aeea5SJeff Kirsher rx_queue = &channel->rx_queue; 463874aeea5SJeff Kirsher rx_queue->buffer = NULL; 464874aeea5SJeff Kirsher memset(&rx_queue->rxd, 0, sizeof(rx_queue->rxd)); 465874aeea5SJeff Kirsher 466874aeea5SJeff Kirsher for (j = 0; j < EFX_TXQ_TYPES; j++) { 467874aeea5SJeff Kirsher tx_queue = &channel->tx_queue[j]; 468874aeea5SJeff Kirsher if (tx_queue->channel) 469874aeea5SJeff Kirsher tx_queue->channel = channel; 470874aeea5SJeff Kirsher tx_queue->buffer = NULL; 471874aeea5SJeff Kirsher memset(&tx_queue->txd, 0, sizeof(tx_queue->txd)); 472874aeea5SJeff Kirsher } 473874aeea5SJeff Kirsher } else { 474874aeea5SJeff Kirsher channel = kzalloc(sizeof(*channel), GFP_KERNEL); 475874aeea5SJeff Kirsher if (!channel) 476874aeea5SJeff Kirsher return NULL; 477874aeea5SJeff Kirsher 478874aeea5SJeff Kirsher channel->efx = efx; 479874aeea5SJeff Kirsher channel->channel = i; 480874aeea5SJeff Kirsher 481874aeea5SJeff Kirsher for (j = 0; j < EFX_TXQ_TYPES; j++) { 482874aeea5SJeff Kirsher tx_queue = &channel->tx_queue[j]; 483874aeea5SJeff Kirsher tx_queue->efx = efx; 484874aeea5SJeff Kirsher tx_queue->queue = i * EFX_TXQ_TYPES + j; 485874aeea5SJeff Kirsher tx_queue->channel = channel; 486874aeea5SJeff Kirsher } 487874aeea5SJeff Kirsher } 488874aeea5SJeff Kirsher 489874aeea5SJeff Kirsher rx_queue = &channel->rx_queue; 490874aeea5SJeff Kirsher rx_queue->efx = efx; 491874aeea5SJeff Kirsher setup_timer(&rx_queue->slow_fill, efx_rx_slow_fill, 492874aeea5SJeff Kirsher (unsigned long)rx_queue); 493874aeea5SJeff Kirsher 494874aeea5SJeff Kirsher return channel; 495874aeea5SJeff Kirsher } 496874aeea5SJeff Kirsher 497874aeea5SJeff Kirsher static int efx_probe_channel(struct efx_channel *channel) 498874aeea5SJeff Kirsher { 499874aeea5SJeff Kirsher struct efx_tx_queue *tx_queue; 500874aeea5SJeff Kirsher struct efx_rx_queue *rx_queue; 501874aeea5SJeff Kirsher int rc; 502874aeea5SJeff Kirsher 503874aeea5SJeff Kirsher netif_dbg(channel->efx, probe, channel->efx->net_dev, 504874aeea5SJeff Kirsher "creating channel %d\n", channel->channel); 505874aeea5SJeff Kirsher 506874aeea5SJeff Kirsher rc = efx_probe_eventq(channel); 507874aeea5SJeff Kirsher if (rc) 508874aeea5SJeff Kirsher goto fail1; 509874aeea5SJeff Kirsher 510874aeea5SJeff Kirsher efx_for_each_channel_tx_queue(tx_queue, channel) { 511874aeea5SJeff Kirsher rc = efx_probe_tx_queue(tx_queue); 512874aeea5SJeff Kirsher if (rc) 513874aeea5SJeff Kirsher goto fail2; 514874aeea5SJeff Kirsher } 515874aeea5SJeff Kirsher 516874aeea5SJeff Kirsher efx_for_each_channel_rx_queue(rx_queue, channel) { 517874aeea5SJeff Kirsher rc = efx_probe_rx_queue(rx_queue); 518874aeea5SJeff Kirsher if (rc) 519874aeea5SJeff Kirsher goto fail3; 520874aeea5SJeff Kirsher } 521874aeea5SJeff Kirsher 522874aeea5SJeff Kirsher channel->n_rx_frm_trunc = 0; 523874aeea5SJeff Kirsher 524874aeea5SJeff Kirsher return 0; 525874aeea5SJeff Kirsher 526874aeea5SJeff Kirsher fail3: 527874aeea5SJeff Kirsher efx_for_each_channel_rx_queue(rx_queue, channel) 528874aeea5SJeff Kirsher efx_remove_rx_queue(rx_queue); 529874aeea5SJeff Kirsher fail2: 530874aeea5SJeff Kirsher efx_for_each_channel_tx_queue(tx_queue, channel) 531874aeea5SJeff Kirsher efx_remove_tx_queue(tx_queue); 532874aeea5SJeff Kirsher fail1: 533874aeea5SJeff Kirsher return rc; 534874aeea5SJeff Kirsher } 535874aeea5SJeff Kirsher 536874aeea5SJeff Kirsher 537874aeea5SJeff Kirsher static void efx_set_channel_names(struct efx_nic *efx) 538874aeea5SJeff Kirsher { 539874aeea5SJeff Kirsher struct efx_channel *channel; 540874aeea5SJeff Kirsher const char *type = ""; 541874aeea5SJeff Kirsher int number; 542874aeea5SJeff Kirsher 543874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) { 544874aeea5SJeff Kirsher number = channel->channel; 545874aeea5SJeff Kirsher if (efx->n_channels > efx->n_rx_channels) { 546874aeea5SJeff Kirsher if (channel->channel < efx->n_rx_channels) { 547874aeea5SJeff Kirsher type = "-rx"; 548874aeea5SJeff Kirsher } else { 549874aeea5SJeff Kirsher type = "-tx"; 550874aeea5SJeff Kirsher number -= efx->n_rx_channels; 551874aeea5SJeff Kirsher } 552874aeea5SJeff Kirsher } 553874aeea5SJeff Kirsher snprintf(efx->channel_name[channel->channel], 554874aeea5SJeff Kirsher sizeof(efx->channel_name[0]), 555874aeea5SJeff Kirsher "%s%s-%d", efx->name, type, number); 556874aeea5SJeff Kirsher } 557874aeea5SJeff Kirsher } 558874aeea5SJeff Kirsher 559874aeea5SJeff Kirsher static int efx_probe_channels(struct efx_nic *efx) 560874aeea5SJeff Kirsher { 561874aeea5SJeff Kirsher struct efx_channel *channel; 562874aeea5SJeff Kirsher int rc; 563874aeea5SJeff Kirsher 564874aeea5SJeff Kirsher /* Restart special buffer allocation */ 565874aeea5SJeff Kirsher efx->next_buffer_table = 0; 566874aeea5SJeff Kirsher 567874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) { 568874aeea5SJeff Kirsher rc = efx_probe_channel(channel); 569874aeea5SJeff Kirsher if (rc) { 570874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 571874aeea5SJeff Kirsher "failed to create channel %d\n", 572874aeea5SJeff Kirsher channel->channel); 573874aeea5SJeff Kirsher goto fail; 574874aeea5SJeff Kirsher } 575874aeea5SJeff Kirsher } 576874aeea5SJeff Kirsher efx_set_channel_names(efx); 577874aeea5SJeff Kirsher 578874aeea5SJeff Kirsher return 0; 579874aeea5SJeff Kirsher 580874aeea5SJeff Kirsher fail: 581874aeea5SJeff Kirsher efx_remove_channels(efx); 582874aeea5SJeff Kirsher return rc; 583874aeea5SJeff Kirsher } 584874aeea5SJeff Kirsher 585874aeea5SJeff Kirsher /* Channels are shutdown and reinitialised whilst the NIC is running 586874aeea5SJeff Kirsher * to propagate configuration changes (mtu, checksum offload), or 587874aeea5SJeff Kirsher * to clear hardware error conditions 588874aeea5SJeff Kirsher */ 5899f2cb71cSBen Hutchings static void efx_start_datapath(struct efx_nic *efx) 590874aeea5SJeff Kirsher { 591874aeea5SJeff Kirsher struct efx_tx_queue *tx_queue; 592874aeea5SJeff Kirsher struct efx_rx_queue *rx_queue; 593874aeea5SJeff Kirsher struct efx_channel *channel; 594874aeea5SJeff Kirsher 595874aeea5SJeff Kirsher /* Calculate the rx buffer allocation parameters required to 596874aeea5SJeff Kirsher * support the current MTU, including padding for header 597874aeea5SJeff Kirsher * alignment and overruns. 598874aeea5SJeff Kirsher */ 599874aeea5SJeff Kirsher efx->rx_buffer_len = (max(EFX_PAGE_IP_ALIGN, NET_IP_ALIGN) + 600874aeea5SJeff Kirsher EFX_MAX_FRAME_LEN(efx->net_dev->mtu) + 601874aeea5SJeff Kirsher efx->type->rx_buffer_hash_size + 602874aeea5SJeff Kirsher efx->type->rx_buffer_padding); 603874aeea5SJeff Kirsher efx->rx_buffer_order = get_order(efx->rx_buffer_len + 604874aeea5SJeff Kirsher sizeof(struct efx_rx_page_state)); 605874aeea5SJeff Kirsher 606874aeea5SJeff Kirsher /* Initialise the channels */ 607874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) { 608874aeea5SJeff Kirsher efx_for_each_channel_tx_queue(tx_queue, channel) 609874aeea5SJeff Kirsher efx_init_tx_queue(tx_queue); 610874aeea5SJeff Kirsher 611874aeea5SJeff Kirsher /* The rx buffer allocation strategy is MTU dependent */ 612874aeea5SJeff Kirsher efx_rx_strategy(channel); 613874aeea5SJeff Kirsher 6149f2cb71cSBen Hutchings efx_for_each_channel_rx_queue(rx_queue, channel) { 615874aeea5SJeff Kirsher efx_init_rx_queue(rx_queue); 6169f2cb71cSBen Hutchings efx_nic_generate_fill_event(rx_queue); 6179f2cb71cSBen Hutchings } 618874aeea5SJeff Kirsher 619874aeea5SJeff Kirsher WARN_ON(channel->rx_pkt != NULL); 620874aeea5SJeff Kirsher efx_rx_strategy(channel); 621874aeea5SJeff Kirsher } 6229f2cb71cSBen Hutchings 6239f2cb71cSBen Hutchings if (netif_device_present(efx->net_dev)) 6249f2cb71cSBen Hutchings netif_tx_wake_all_queues(efx->net_dev); 625874aeea5SJeff Kirsher } 626874aeea5SJeff Kirsher 6279f2cb71cSBen Hutchings static void efx_stop_datapath(struct efx_nic *efx) 628874aeea5SJeff Kirsher { 629874aeea5SJeff Kirsher struct efx_channel *channel; 630874aeea5SJeff Kirsher struct efx_tx_queue *tx_queue; 631874aeea5SJeff Kirsher struct efx_rx_queue *rx_queue; 632874aeea5SJeff Kirsher int rc; 633874aeea5SJeff Kirsher 634874aeea5SJeff Kirsher EFX_ASSERT_RESET_SERIALISED(efx); 635874aeea5SJeff Kirsher BUG_ON(efx->port_enabled); 636874aeea5SJeff Kirsher 637874aeea5SJeff Kirsher rc = efx_nic_flush_queues(efx); 638874aeea5SJeff Kirsher if (rc && EFX_WORKAROUND_7803(efx)) { 639874aeea5SJeff Kirsher /* Schedule a reset to recover from the flush failure. The 640874aeea5SJeff Kirsher * descriptor caches reference memory we're about to free, 641874aeea5SJeff Kirsher * but falcon_reconfigure_mac_wrapper() won't reconnect 642874aeea5SJeff Kirsher * the MACs because of the pending reset. */ 643874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, 644874aeea5SJeff Kirsher "Resetting to recover from flush failure\n"); 645874aeea5SJeff Kirsher efx_schedule_reset(efx, RESET_TYPE_ALL); 646874aeea5SJeff Kirsher } else if (rc) { 647874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, "failed to flush queues\n"); 648874aeea5SJeff Kirsher } else { 649874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, 650874aeea5SJeff Kirsher "successfully flushed all queues\n"); 651874aeea5SJeff Kirsher } 652874aeea5SJeff Kirsher 653874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) { 6549f2cb71cSBen Hutchings /* RX packet processing is pipelined, so wait for the 6559f2cb71cSBen Hutchings * NAPI handler to complete. At least event queue 0 6569f2cb71cSBen Hutchings * might be kept active by non-data events, so don't 6579f2cb71cSBen Hutchings * use napi_synchronize() but actually disable NAPI 6589f2cb71cSBen Hutchings * temporarily. 6599f2cb71cSBen Hutchings */ 6609f2cb71cSBen Hutchings if (efx_channel_has_rx_queue(channel)) { 6619f2cb71cSBen Hutchings efx_stop_eventq(channel); 6629f2cb71cSBen Hutchings efx_start_eventq(channel); 6639f2cb71cSBen Hutchings } 664874aeea5SJeff Kirsher 665874aeea5SJeff Kirsher efx_for_each_channel_rx_queue(rx_queue, channel) 666874aeea5SJeff Kirsher efx_fini_rx_queue(rx_queue); 667874aeea5SJeff Kirsher efx_for_each_possible_channel_tx_queue(tx_queue, channel) 668874aeea5SJeff Kirsher efx_fini_tx_queue(tx_queue); 669874aeea5SJeff Kirsher } 670874aeea5SJeff Kirsher } 671874aeea5SJeff Kirsher 672874aeea5SJeff Kirsher static void efx_remove_channel(struct efx_channel *channel) 673874aeea5SJeff Kirsher { 674874aeea5SJeff Kirsher struct efx_tx_queue *tx_queue; 675874aeea5SJeff Kirsher struct efx_rx_queue *rx_queue; 676874aeea5SJeff Kirsher 677874aeea5SJeff Kirsher netif_dbg(channel->efx, drv, channel->efx->net_dev, 678874aeea5SJeff Kirsher "destroy chan %d\n", channel->channel); 679874aeea5SJeff Kirsher 680874aeea5SJeff Kirsher efx_for_each_channel_rx_queue(rx_queue, channel) 681874aeea5SJeff Kirsher efx_remove_rx_queue(rx_queue); 682874aeea5SJeff Kirsher efx_for_each_possible_channel_tx_queue(tx_queue, channel) 683874aeea5SJeff Kirsher efx_remove_tx_queue(tx_queue); 684874aeea5SJeff Kirsher efx_remove_eventq(channel); 685874aeea5SJeff Kirsher } 686874aeea5SJeff Kirsher 687874aeea5SJeff Kirsher static void efx_remove_channels(struct efx_nic *efx) 688874aeea5SJeff Kirsher { 689874aeea5SJeff Kirsher struct efx_channel *channel; 690874aeea5SJeff Kirsher 691874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) 692874aeea5SJeff Kirsher efx_remove_channel(channel); 693874aeea5SJeff Kirsher } 694874aeea5SJeff Kirsher 695874aeea5SJeff Kirsher int 696874aeea5SJeff Kirsher efx_realloc_channels(struct efx_nic *efx, u32 rxq_entries, u32 txq_entries) 697874aeea5SJeff Kirsher { 698874aeea5SJeff Kirsher struct efx_channel *other_channel[EFX_MAX_CHANNELS], *channel; 699874aeea5SJeff Kirsher u32 old_rxq_entries, old_txq_entries; 700874aeea5SJeff Kirsher unsigned i; 701874aeea5SJeff Kirsher int rc; 702874aeea5SJeff Kirsher 703874aeea5SJeff Kirsher efx_stop_all(efx); 7049f2cb71cSBen Hutchings efx_stop_interrupts(efx); 705874aeea5SJeff Kirsher 706874aeea5SJeff Kirsher /* Clone channels */ 707874aeea5SJeff Kirsher memset(other_channel, 0, sizeof(other_channel)); 708874aeea5SJeff Kirsher for (i = 0; i < efx->n_channels; i++) { 709874aeea5SJeff Kirsher channel = efx_alloc_channel(efx, i, efx->channel[i]); 710874aeea5SJeff Kirsher if (!channel) { 711874aeea5SJeff Kirsher rc = -ENOMEM; 712874aeea5SJeff Kirsher goto out; 713874aeea5SJeff Kirsher } 714874aeea5SJeff Kirsher other_channel[i] = channel; 715874aeea5SJeff Kirsher } 716874aeea5SJeff Kirsher 717874aeea5SJeff Kirsher /* Swap entry counts and channel pointers */ 718874aeea5SJeff Kirsher old_rxq_entries = efx->rxq_entries; 719874aeea5SJeff Kirsher old_txq_entries = efx->txq_entries; 720874aeea5SJeff Kirsher efx->rxq_entries = rxq_entries; 721874aeea5SJeff Kirsher efx->txq_entries = txq_entries; 722874aeea5SJeff Kirsher for (i = 0; i < efx->n_channels; i++) { 723874aeea5SJeff Kirsher channel = efx->channel[i]; 724874aeea5SJeff Kirsher efx->channel[i] = other_channel[i]; 725874aeea5SJeff Kirsher other_channel[i] = channel; 726874aeea5SJeff Kirsher } 727874aeea5SJeff Kirsher 728874aeea5SJeff Kirsher rc = efx_probe_channels(efx); 729874aeea5SJeff Kirsher if (rc) 730874aeea5SJeff Kirsher goto rollback; 731874aeea5SJeff Kirsher 732874aeea5SJeff Kirsher efx_init_napi(efx); 733874aeea5SJeff Kirsher 734874aeea5SJeff Kirsher /* Destroy old channels */ 735874aeea5SJeff Kirsher for (i = 0; i < efx->n_channels; i++) { 736874aeea5SJeff Kirsher efx_fini_napi_channel(other_channel[i]); 737874aeea5SJeff Kirsher efx_remove_channel(other_channel[i]); 738874aeea5SJeff Kirsher } 739874aeea5SJeff Kirsher out: 740874aeea5SJeff Kirsher /* Free unused channel structures */ 741874aeea5SJeff Kirsher for (i = 0; i < efx->n_channels; i++) 742874aeea5SJeff Kirsher kfree(other_channel[i]); 743874aeea5SJeff Kirsher 7449f2cb71cSBen Hutchings efx_start_interrupts(efx); 745874aeea5SJeff Kirsher efx_start_all(efx); 746874aeea5SJeff Kirsher return rc; 747874aeea5SJeff Kirsher 748874aeea5SJeff Kirsher rollback: 749874aeea5SJeff Kirsher /* Swap back */ 750874aeea5SJeff Kirsher efx->rxq_entries = old_rxq_entries; 751874aeea5SJeff Kirsher efx->txq_entries = old_txq_entries; 752874aeea5SJeff Kirsher for (i = 0; i < efx->n_channels; i++) { 753874aeea5SJeff Kirsher channel = efx->channel[i]; 754874aeea5SJeff Kirsher efx->channel[i] = other_channel[i]; 755874aeea5SJeff Kirsher other_channel[i] = channel; 756874aeea5SJeff Kirsher } 757874aeea5SJeff Kirsher goto out; 758874aeea5SJeff Kirsher } 759874aeea5SJeff Kirsher 760874aeea5SJeff Kirsher void efx_schedule_slow_fill(struct efx_rx_queue *rx_queue) 761874aeea5SJeff Kirsher { 762874aeea5SJeff Kirsher mod_timer(&rx_queue->slow_fill, jiffies + msecs_to_jiffies(100)); 763874aeea5SJeff Kirsher } 764874aeea5SJeff Kirsher 765874aeea5SJeff Kirsher /************************************************************************** 766874aeea5SJeff Kirsher * 767874aeea5SJeff Kirsher * Port handling 768874aeea5SJeff Kirsher * 769874aeea5SJeff Kirsher **************************************************************************/ 770874aeea5SJeff Kirsher 771874aeea5SJeff Kirsher /* This ensures that the kernel is kept informed (via 772874aeea5SJeff Kirsher * netif_carrier_on/off) of the link status, and also maintains the 773874aeea5SJeff Kirsher * link status's stop on the port's TX queue. 774874aeea5SJeff Kirsher */ 775874aeea5SJeff Kirsher void efx_link_status_changed(struct efx_nic *efx) 776874aeea5SJeff Kirsher { 777874aeea5SJeff Kirsher struct efx_link_state *link_state = &efx->link_state; 778874aeea5SJeff Kirsher 779874aeea5SJeff Kirsher /* SFC Bug 5356: A net_dev notifier is registered, so we must ensure 780874aeea5SJeff Kirsher * that no events are triggered between unregister_netdev() and the 781874aeea5SJeff Kirsher * driver unloading. A more general condition is that NETDEV_CHANGE 782874aeea5SJeff Kirsher * can only be generated between NETDEV_UP and NETDEV_DOWN */ 783874aeea5SJeff Kirsher if (!netif_running(efx->net_dev)) 784874aeea5SJeff Kirsher return; 785874aeea5SJeff Kirsher 786874aeea5SJeff Kirsher if (link_state->up != netif_carrier_ok(efx->net_dev)) { 787874aeea5SJeff Kirsher efx->n_link_state_changes++; 788874aeea5SJeff Kirsher 789874aeea5SJeff Kirsher if (link_state->up) 790874aeea5SJeff Kirsher netif_carrier_on(efx->net_dev); 791874aeea5SJeff Kirsher else 792874aeea5SJeff Kirsher netif_carrier_off(efx->net_dev); 793874aeea5SJeff Kirsher } 794874aeea5SJeff Kirsher 795874aeea5SJeff Kirsher /* Status message for kernel log */ 7962aa9ef11SBen Hutchings if (link_state->up) 797874aeea5SJeff Kirsher netif_info(efx, link, efx->net_dev, 798874aeea5SJeff Kirsher "link up at %uMbps %s-duplex (MTU %d)%s\n", 799874aeea5SJeff Kirsher link_state->speed, link_state->fd ? "full" : "half", 800874aeea5SJeff Kirsher efx->net_dev->mtu, 801874aeea5SJeff Kirsher (efx->promiscuous ? " [PROMISC]" : "")); 8022aa9ef11SBen Hutchings else 803874aeea5SJeff Kirsher netif_info(efx, link, efx->net_dev, "link down\n"); 804874aeea5SJeff Kirsher } 805874aeea5SJeff Kirsher 806874aeea5SJeff Kirsher void efx_link_set_advertising(struct efx_nic *efx, u32 advertising) 807874aeea5SJeff Kirsher { 808874aeea5SJeff Kirsher efx->link_advertising = advertising; 809874aeea5SJeff Kirsher if (advertising) { 810874aeea5SJeff Kirsher if (advertising & ADVERTISED_Pause) 811874aeea5SJeff Kirsher efx->wanted_fc |= (EFX_FC_TX | EFX_FC_RX); 812874aeea5SJeff Kirsher else 813874aeea5SJeff Kirsher efx->wanted_fc &= ~(EFX_FC_TX | EFX_FC_RX); 814874aeea5SJeff Kirsher if (advertising & ADVERTISED_Asym_Pause) 815874aeea5SJeff Kirsher efx->wanted_fc ^= EFX_FC_TX; 816874aeea5SJeff Kirsher } 817874aeea5SJeff Kirsher } 818874aeea5SJeff Kirsher 819874aeea5SJeff Kirsher void efx_link_set_wanted_fc(struct efx_nic *efx, u8 wanted_fc) 820874aeea5SJeff Kirsher { 821874aeea5SJeff Kirsher efx->wanted_fc = wanted_fc; 822874aeea5SJeff Kirsher if (efx->link_advertising) { 823874aeea5SJeff Kirsher if (wanted_fc & EFX_FC_RX) 824874aeea5SJeff Kirsher efx->link_advertising |= (ADVERTISED_Pause | 825874aeea5SJeff Kirsher ADVERTISED_Asym_Pause); 826874aeea5SJeff Kirsher else 827874aeea5SJeff Kirsher efx->link_advertising &= ~(ADVERTISED_Pause | 828874aeea5SJeff Kirsher ADVERTISED_Asym_Pause); 829874aeea5SJeff Kirsher if (wanted_fc & EFX_FC_TX) 830874aeea5SJeff Kirsher efx->link_advertising ^= ADVERTISED_Asym_Pause; 831874aeea5SJeff Kirsher } 832874aeea5SJeff Kirsher } 833874aeea5SJeff Kirsher 834874aeea5SJeff Kirsher static void efx_fini_port(struct efx_nic *efx); 835874aeea5SJeff Kirsher 836874aeea5SJeff Kirsher /* Push loopback/power/transmit disable settings to the PHY, and reconfigure 837874aeea5SJeff Kirsher * the MAC appropriately. All other PHY configuration changes are pushed 838874aeea5SJeff Kirsher * through phy_op->set_settings(), and pushed asynchronously to the MAC 839874aeea5SJeff Kirsher * through efx_monitor(). 840874aeea5SJeff Kirsher * 841874aeea5SJeff Kirsher * Callers must hold the mac_lock 842874aeea5SJeff Kirsher */ 843874aeea5SJeff Kirsher int __efx_reconfigure_port(struct efx_nic *efx) 844874aeea5SJeff Kirsher { 845874aeea5SJeff Kirsher enum efx_phy_mode phy_mode; 846874aeea5SJeff Kirsher int rc; 847874aeea5SJeff Kirsher 848874aeea5SJeff Kirsher WARN_ON(!mutex_is_locked(&efx->mac_lock)); 849874aeea5SJeff Kirsher 8500fca8c97SBen Hutchings /* Serialise the promiscuous flag with efx_set_rx_mode. */ 851874aeea5SJeff Kirsher netif_addr_lock_bh(efx->net_dev); 852874aeea5SJeff Kirsher netif_addr_unlock_bh(efx->net_dev); 853874aeea5SJeff Kirsher 854874aeea5SJeff Kirsher /* Disable PHY transmit in mac level loopbacks */ 855874aeea5SJeff Kirsher phy_mode = efx->phy_mode; 856874aeea5SJeff Kirsher if (LOOPBACK_INTERNAL(efx)) 857874aeea5SJeff Kirsher efx->phy_mode |= PHY_MODE_TX_DISABLED; 858874aeea5SJeff Kirsher else 859874aeea5SJeff Kirsher efx->phy_mode &= ~PHY_MODE_TX_DISABLED; 860874aeea5SJeff Kirsher 861874aeea5SJeff Kirsher rc = efx->type->reconfigure_port(efx); 862874aeea5SJeff Kirsher 863874aeea5SJeff Kirsher if (rc) 864874aeea5SJeff Kirsher efx->phy_mode = phy_mode; 865874aeea5SJeff Kirsher 866874aeea5SJeff Kirsher return rc; 867874aeea5SJeff Kirsher } 868874aeea5SJeff Kirsher 869874aeea5SJeff Kirsher /* Reinitialise the MAC to pick up new PHY settings, even if the port is 870874aeea5SJeff Kirsher * disabled. */ 871874aeea5SJeff Kirsher int efx_reconfigure_port(struct efx_nic *efx) 872874aeea5SJeff Kirsher { 873874aeea5SJeff Kirsher int rc; 874874aeea5SJeff Kirsher 875874aeea5SJeff Kirsher EFX_ASSERT_RESET_SERIALISED(efx); 876874aeea5SJeff Kirsher 877874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 878874aeea5SJeff Kirsher rc = __efx_reconfigure_port(efx); 879874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 880874aeea5SJeff Kirsher 881874aeea5SJeff Kirsher return rc; 882874aeea5SJeff Kirsher } 883874aeea5SJeff Kirsher 884874aeea5SJeff Kirsher /* Asynchronous work item for changing MAC promiscuity and multicast 885874aeea5SJeff Kirsher * hash. Avoid a drain/rx_ingress enable by reconfiguring the current 886874aeea5SJeff Kirsher * MAC directly. */ 887874aeea5SJeff Kirsher static void efx_mac_work(struct work_struct *data) 888874aeea5SJeff Kirsher { 889874aeea5SJeff Kirsher struct efx_nic *efx = container_of(data, struct efx_nic, mac_work); 890874aeea5SJeff Kirsher 891874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 89230b81cdaSBen Hutchings if (efx->port_enabled) 893710b208dSBen Hutchings efx->type->reconfigure_mac(efx); 894874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 895874aeea5SJeff Kirsher } 896874aeea5SJeff Kirsher 897874aeea5SJeff Kirsher static int efx_probe_port(struct efx_nic *efx) 898874aeea5SJeff Kirsher { 899874aeea5SJeff Kirsher int rc; 900874aeea5SJeff Kirsher 901874aeea5SJeff Kirsher netif_dbg(efx, probe, efx->net_dev, "create port\n"); 902874aeea5SJeff Kirsher 903874aeea5SJeff Kirsher if (phy_flash_cfg) 904874aeea5SJeff Kirsher efx->phy_mode = PHY_MODE_SPECIAL; 905874aeea5SJeff Kirsher 906874aeea5SJeff Kirsher /* Connect up MAC/PHY operations table */ 907874aeea5SJeff Kirsher rc = efx->type->probe_port(efx); 908874aeea5SJeff Kirsher if (rc) 909874aeea5SJeff Kirsher return rc; 910874aeea5SJeff Kirsher 911e332bcb3SBen Hutchings /* Initialise MAC address to permanent address */ 912e332bcb3SBen Hutchings memcpy(efx->net_dev->dev_addr, efx->net_dev->perm_addr, ETH_ALEN); 913874aeea5SJeff Kirsher 914874aeea5SJeff Kirsher return 0; 915874aeea5SJeff Kirsher } 916874aeea5SJeff Kirsher 917874aeea5SJeff Kirsher static int efx_init_port(struct efx_nic *efx) 918874aeea5SJeff Kirsher { 919874aeea5SJeff Kirsher int rc; 920874aeea5SJeff Kirsher 921874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "init port\n"); 922874aeea5SJeff Kirsher 923874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 924874aeea5SJeff Kirsher 925874aeea5SJeff Kirsher rc = efx->phy_op->init(efx); 926874aeea5SJeff Kirsher if (rc) 927874aeea5SJeff Kirsher goto fail1; 928874aeea5SJeff Kirsher 929874aeea5SJeff Kirsher efx->port_initialized = true; 930874aeea5SJeff Kirsher 931874aeea5SJeff Kirsher /* Reconfigure the MAC before creating dma queues (required for 932874aeea5SJeff Kirsher * Falcon/A1 where RX_INGR_EN/TX_DRAIN_EN isn't supported) */ 933710b208dSBen Hutchings efx->type->reconfigure_mac(efx); 934874aeea5SJeff Kirsher 935874aeea5SJeff Kirsher /* Ensure the PHY advertises the correct flow control settings */ 936874aeea5SJeff Kirsher rc = efx->phy_op->reconfigure(efx); 937874aeea5SJeff Kirsher if (rc) 938874aeea5SJeff Kirsher goto fail2; 939874aeea5SJeff Kirsher 940874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 941874aeea5SJeff Kirsher return 0; 942874aeea5SJeff Kirsher 943874aeea5SJeff Kirsher fail2: 944874aeea5SJeff Kirsher efx->phy_op->fini(efx); 945874aeea5SJeff Kirsher fail1: 946874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 947874aeea5SJeff Kirsher return rc; 948874aeea5SJeff Kirsher } 949874aeea5SJeff Kirsher 950874aeea5SJeff Kirsher static void efx_start_port(struct efx_nic *efx) 951874aeea5SJeff Kirsher { 952874aeea5SJeff Kirsher netif_dbg(efx, ifup, efx->net_dev, "start port\n"); 953874aeea5SJeff Kirsher BUG_ON(efx->port_enabled); 954874aeea5SJeff Kirsher 955874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 956874aeea5SJeff Kirsher efx->port_enabled = true; 957874aeea5SJeff Kirsher 958874aeea5SJeff Kirsher /* efx_mac_work() might have been scheduled after efx_stop_port(), 959874aeea5SJeff Kirsher * and then cancelled by efx_flush_all() */ 960710b208dSBen Hutchings efx->type->reconfigure_mac(efx); 961874aeea5SJeff Kirsher 962874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 963874aeea5SJeff Kirsher } 964874aeea5SJeff Kirsher 965874aeea5SJeff Kirsher /* Prevent efx_mac_work() and efx_monitor() from working */ 966874aeea5SJeff Kirsher static void efx_stop_port(struct efx_nic *efx) 967874aeea5SJeff Kirsher { 968874aeea5SJeff Kirsher netif_dbg(efx, ifdown, efx->net_dev, "stop port\n"); 969874aeea5SJeff Kirsher 970874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 971874aeea5SJeff Kirsher efx->port_enabled = false; 972874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 973874aeea5SJeff Kirsher 974874aeea5SJeff Kirsher /* Serialise against efx_set_multicast_list() */ 975874aeea5SJeff Kirsher netif_addr_lock_bh(efx->net_dev); 976874aeea5SJeff Kirsher netif_addr_unlock_bh(efx->net_dev); 977874aeea5SJeff Kirsher } 978874aeea5SJeff Kirsher 979874aeea5SJeff Kirsher static void efx_fini_port(struct efx_nic *efx) 980874aeea5SJeff Kirsher { 981874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "shut down port\n"); 982874aeea5SJeff Kirsher 983874aeea5SJeff Kirsher if (!efx->port_initialized) 984874aeea5SJeff Kirsher return; 985874aeea5SJeff Kirsher 986874aeea5SJeff Kirsher efx->phy_op->fini(efx); 987874aeea5SJeff Kirsher efx->port_initialized = false; 988874aeea5SJeff Kirsher 989874aeea5SJeff Kirsher efx->link_state.up = false; 990874aeea5SJeff Kirsher efx_link_status_changed(efx); 991874aeea5SJeff Kirsher } 992874aeea5SJeff Kirsher 993874aeea5SJeff Kirsher static void efx_remove_port(struct efx_nic *efx) 994874aeea5SJeff Kirsher { 995874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "destroying port\n"); 996874aeea5SJeff Kirsher 997874aeea5SJeff Kirsher efx->type->remove_port(efx); 998874aeea5SJeff Kirsher } 999874aeea5SJeff Kirsher 1000874aeea5SJeff Kirsher /************************************************************************** 1001874aeea5SJeff Kirsher * 1002874aeea5SJeff Kirsher * NIC handling 1003874aeea5SJeff Kirsher * 1004874aeea5SJeff Kirsher **************************************************************************/ 1005874aeea5SJeff Kirsher 1006874aeea5SJeff Kirsher /* This configures the PCI device to enable I/O and DMA. */ 1007874aeea5SJeff Kirsher static int efx_init_io(struct efx_nic *efx) 1008874aeea5SJeff Kirsher { 1009874aeea5SJeff Kirsher struct pci_dev *pci_dev = efx->pci_dev; 1010874aeea5SJeff Kirsher dma_addr_t dma_mask = efx->type->max_dma_mask; 1011874aeea5SJeff Kirsher int rc; 1012874aeea5SJeff Kirsher 1013874aeea5SJeff Kirsher netif_dbg(efx, probe, efx->net_dev, "initialising I/O\n"); 1014874aeea5SJeff Kirsher 1015874aeea5SJeff Kirsher rc = pci_enable_device(pci_dev); 1016874aeea5SJeff Kirsher if (rc) { 1017874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 1018874aeea5SJeff Kirsher "failed to enable PCI device\n"); 1019874aeea5SJeff Kirsher goto fail1; 1020874aeea5SJeff Kirsher } 1021874aeea5SJeff Kirsher 1022874aeea5SJeff Kirsher pci_set_master(pci_dev); 1023874aeea5SJeff Kirsher 1024874aeea5SJeff Kirsher /* Set the PCI DMA mask. Try all possibilities from our 1025874aeea5SJeff Kirsher * genuine mask down to 32 bits, because some architectures 1026874aeea5SJeff Kirsher * (e.g. x86_64 with iommu_sac_force set) will allow 40 bit 1027874aeea5SJeff Kirsher * masks event though they reject 46 bit masks. 1028874aeea5SJeff Kirsher */ 1029874aeea5SJeff Kirsher while (dma_mask > 0x7fffffffUL) { 1030e9e01846SBen Hutchings if (pci_dma_supported(pci_dev, dma_mask)) { 1031e9e01846SBen Hutchings rc = pci_set_dma_mask(pci_dev, dma_mask); 1032e9e01846SBen Hutchings if (rc == 0) 1033874aeea5SJeff Kirsher break; 1034e9e01846SBen Hutchings } 1035874aeea5SJeff Kirsher dma_mask >>= 1; 1036874aeea5SJeff Kirsher } 1037874aeea5SJeff Kirsher if (rc) { 1038874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 1039874aeea5SJeff Kirsher "could not find a suitable DMA mask\n"); 1040874aeea5SJeff Kirsher goto fail2; 1041874aeea5SJeff Kirsher } 1042874aeea5SJeff Kirsher netif_dbg(efx, probe, efx->net_dev, 1043874aeea5SJeff Kirsher "using DMA mask %llx\n", (unsigned long long) dma_mask); 1044874aeea5SJeff Kirsher rc = pci_set_consistent_dma_mask(pci_dev, dma_mask); 1045874aeea5SJeff Kirsher if (rc) { 1046874aeea5SJeff Kirsher /* pci_set_consistent_dma_mask() is not *allowed* to 1047874aeea5SJeff Kirsher * fail with a mask that pci_set_dma_mask() accepted, 1048874aeea5SJeff Kirsher * but just in case... 1049874aeea5SJeff Kirsher */ 1050874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 1051874aeea5SJeff Kirsher "failed to set consistent DMA mask\n"); 1052874aeea5SJeff Kirsher goto fail2; 1053874aeea5SJeff Kirsher } 1054874aeea5SJeff Kirsher 1055874aeea5SJeff Kirsher efx->membase_phys = pci_resource_start(efx->pci_dev, EFX_MEM_BAR); 1056874aeea5SJeff Kirsher rc = pci_request_region(pci_dev, EFX_MEM_BAR, "sfc"); 1057874aeea5SJeff Kirsher if (rc) { 1058874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 1059874aeea5SJeff Kirsher "request for memory BAR failed\n"); 1060874aeea5SJeff Kirsher rc = -EIO; 1061874aeea5SJeff Kirsher goto fail3; 1062874aeea5SJeff Kirsher } 1063874aeea5SJeff Kirsher efx->membase = ioremap_nocache(efx->membase_phys, 1064874aeea5SJeff Kirsher efx->type->mem_map_size); 1065874aeea5SJeff Kirsher if (!efx->membase) { 1066874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 1067874aeea5SJeff Kirsher "could not map memory BAR at %llx+%x\n", 1068874aeea5SJeff Kirsher (unsigned long long)efx->membase_phys, 1069874aeea5SJeff Kirsher efx->type->mem_map_size); 1070874aeea5SJeff Kirsher rc = -ENOMEM; 1071874aeea5SJeff Kirsher goto fail4; 1072874aeea5SJeff Kirsher } 1073874aeea5SJeff Kirsher netif_dbg(efx, probe, efx->net_dev, 1074874aeea5SJeff Kirsher "memory BAR at %llx+%x (virtual %p)\n", 1075874aeea5SJeff Kirsher (unsigned long long)efx->membase_phys, 1076874aeea5SJeff Kirsher efx->type->mem_map_size, efx->membase); 1077874aeea5SJeff Kirsher 1078874aeea5SJeff Kirsher return 0; 1079874aeea5SJeff Kirsher 1080874aeea5SJeff Kirsher fail4: 1081874aeea5SJeff Kirsher pci_release_region(efx->pci_dev, EFX_MEM_BAR); 1082874aeea5SJeff Kirsher fail3: 1083874aeea5SJeff Kirsher efx->membase_phys = 0; 1084874aeea5SJeff Kirsher fail2: 1085874aeea5SJeff Kirsher pci_disable_device(efx->pci_dev); 1086874aeea5SJeff Kirsher fail1: 1087874aeea5SJeff Kirsher return rc; 1088874aeea5SJeff Kirsher } 1089874aeea5SJeff Kirsher 1090874aeea5SJeff Kirsher static void efx_fini_io(struct efx_nic *efx) 1091874aeea5SJeff Kirsher { 1092874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "shutting down I/O\n"); 1093874aeea5SJeff Kirsher 1094874aeea5SJeff Kirsher if (efx->membase) { 1095874aeea5SJeff Kirsher iounmap(efx->membase); 1096874aeea5SJeff Kirsher efx->membase = NULL; 1097874aeea5SJeff Kirsher } 1098874aeea5SJeff Kirsher 1099874aeea5SJeff Kirsher if (efx->membase_phys) { 1100874aeea5SJeff Kirsher pci_release_region(efx->pci_dev, EFX_MEM_BAR); 1101874aeea5SJeff Kirsher efx->membase_phys = 0; 1102874aeea5SJeff Kirsher } 1103874aeea5SJeff Kirsher 1104874aeea5SJeff Kirsher pci_disable_device(efx->pci_dev); 1105874aeea5SJeff Kirsher } 1106874aeea5SJeff Kirsher 1107a16e5b24SBen Hutchings static unsigned int efx_wanted_parallelism(void) 1108874aeea5SJeff Kirsher { 1109cdb08f8fSBen Hutchings cpumask_var_t thread_mask; 1110a16e5b24SBen Hutchings unsigned int count; 1111874aeea5SJeff Kirsher int cpu; 1112874aeea5SJeff Kirsher 1113874aeea5SJeff Kirsher if (rss_cpus) 1114874aeea5SJeff Kirsher return rss_cpus; 1115874aeea5SJeff Kirsher 1116cdb08f8fSBen Hutchings if (unlikely(!zalloc_cpumask_var(&thread_mask, GFP_KERNEL))) { 1117874aeea5SJeff Kirsher printk(KERN_WARNING 1118874aeea5SJeff Kirsher "sfc: RSS disabled due to allocation failure\n"); 1119874aeea5SJeff Kirsher return 1; 1120874aeea5SJeff Kirsher } 1121874aeea5SJeff Kirsher 1122874aeea5SJeff Kirsher count = 0; 1123874aeea5SJeff Kirsher for_each_online_cpu(cpu) { 1124cdb08f8fSBen Hutchings if (!cpumask_test_cpu(cpu, thread_mask)) { 1125874aeea5SJeff Kirsher ++count; 1126cdb08f8fSBen Hutchings cpumask_or(thread_mask, thread_mask, 1127cdb08f8fSBen Hutchings topology_thread_cpumask(cpu)); 1128874aeea5SJeff Kirsher } 1129874aeea5SJeff Kirsher } 1130874aeea5SJeff Kirsher 1131cdb08f8fSBen Hutchings free_cpumask_var(thread_mask); 1132874aeea5SJeff Kirsher return count; 1133874aeea5SJeff Kirsher } 1134874aeea5SJeff Kirsher 1135874aeea5SJeff Kirsher static int 1136874aeea5SJeff Kirsher efx_init_rx_cpu_rmap(struct efx_nic *efx, struct msix_entry *xentries) 1137874aeea5SJeff Kirsher { 1138874aeea5SJeff Kirsher #ifdef CONFIG_RFS_ACCEL 1139a16e5b24SBen Hutchings unsigned int i; 1140a16e5b24SBen Hutchings int rc; 1141874aeea5SJeff Kirsher 1142874aeea5SJeff Kirsher efx->net_dev->rx_cpu_rmap = alloc_irq_cpu_rmap(efx->n_rx_channels); 1143874aeea5SJeff Kirsher if (!efx->net_dev->rx_cpu_rmap) 1144874aeea5SJeff Kirsher return -ENOMEM; 1145874aeea5SJeff Kirsher for (i = 0; i < efx->n_rx_channels; i++) { 1146874aeea5SJeff Kirsher rc = irq_cpu_rmap_add(efx->net_dev->rx_cpu_rmap, 1147874aeea5SJeff Kirsher xentries[i].vector); 1148874aeea5SJeff Kirsher if (rc) { 1149874aeea5SJeff Kirsher free_irq_cpu_rmap(efx->net_dev->rx_cpu_rmap); 1150874aeea5SJeff Kirsher efx->net_dev->rx_cpu_rmap = NULL; 1151874aeea5SJeff Kirsher return rc; 1152874aeea5SJeff Kirsher } 1153874aeea5SJeff Kirsher } 1154874aeea5SJeff Kirsher #endif 1155874aeea5SJeff Kirsher return 0; 1156874aeea5SJeff Kirsher } 1157874aeea5SJeff Kirsher 1158874aeea5SJeff Kirsher /* Probe the number and type of interrupts we are able to obtain, and 1159874aeea5SJeff Kirsher * the resulting numbers of channels and RX queues. 1160874aeea5SJeff Kirsher */ 1161874aeea5SJeff Kirsher static int efx_probe_interrupts(struct efx_nic *efx) 1162874aeea5SJeff Kirsher { 1163a16e5b24SBen Hutchings unsigned int max_channels = 1164a16e5b24SBen Hutchings min(efx->type->phys_addr_channels, EFX_MAX_CHANNELS); 1165a16e5b24SBen Hutchings unsigned int i; 1166a16e5b24SBen Hutchings int rc; 1167874aeea5SJeff Kirsher 1168874aeea5SJeff Kirsher if (efx->interrupt_mode == EFX_INT_MODE_MSIX) { 1169874aeea5SJeff Kirsher struct msix_entry xentries[EFX_MAX_CHANNELS]; 1170a16e5b24SBen Hutchings unsigned int n_channels; 1171874aeea5SJeff Kirsher 1172fa142b9dSBen Hutchings n_channels = efx_wanted_parallelism(); 1173874aeea5SJeff Kirsher if (separate_tx_channels) 1174874aeea5SJeff Kirsher n_channels *= 2; 1175874aeea5SJeff Kirsher n_channels = min(n_channels, max_channels); 1176874aeea5SJeff Kirsher 1177874aeea5SJeff Kirsher for (i = 0; i < n_channels; i++) 1178874aeea5SJeff Kirsher xentries[i].entry = i; 1179874aeea5SJeff Kirsher rc = pci_enable_msix(efx->pci_dev, xentries, n_channels); 1180874aeea5SJeff Kirsher if (rc > 0) { 1181874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, 1182874aeea5SJeff Kirsher "WARNING: Insufficient MSI-X vectors" 1183a16e5b24SBen Hutchings " available (%d < %u).\n", rc, n_channels); 1184874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, 1185874aeea5SJeff Kirsher "WARNING: Performance may be reduced.\n"); 1186874aeea5SJeff Kirsher EFX_BUG_ON_PARANOID(rc >= n_channels); 1187874aeea5SJeff Kirsher n_channels = rc; 1188874aeea5SJeff Kirsher rc = pci_enable_msix(efx->pci_dev, xentries, 1189874aeea5SJeff Kirsher n_channels); 1190874aeea5SJeff Kirsher } 1191874aeea5SJeff Kirsher 1192874aeea5SJeff Kirsher if (rc == 0) { 1193874aeea5SJeff Kirsher efx->n_channels = n_channels; 1194874aeea5SJeff Kirsher if (separate_tx_channels) { 1195874aeea5SJeff Kirsher efx->n_tx_channels = 1196874aeea5SJeff Kirsher max(efx->n_channels / 2, 1U); 1197874aeea5SJeff Kirsher efx->n_rx_channels = 1198874aeea5SJeff Kirsher max(efx->n_channels - 1199874aeea5SJeff Kirsher efx->n_tx_channels, 1U); 1200874aeea5SJeff Kirsher } else { 1201874aeea5SJeff Kirsher efx->n_tx_channels = efx->n_channels; 1202874aeea5SJeff Kirsher efx->n_rx_channels = efx->n_channels; 1203874aeea5SJeff Kirsher } 1204874aeea5SJeff Kirsher rc = efx_init_rx_cpu_rmap(efx, xentries); 1205874aeea5SJeff Kirsher if (rc) { 1206874aeea5SJeff Kirsher pci_disable_msix(efx->pci_dev); 1207874aeea5SJeff Kirsher return rc; 1208874aeea5SJeff Kirsher } 1209874aeea5SJeff Kirsher for (i = 0; i < n_channels; i++) 1210874aeea5SJeff Kirsher efx_get_channel(efx, i)->irq = 1211874aeea5SJeff Kirsher xentries[i].vector; 1212874aeea5SJeff Kirsher } else { 1213874aeea5SJeff Kirsher /* Fall back to single channel MSI */ 1214874aeea5SJeff Kirsher efx->interrupt_mode = EFX_INT_MODE_MSI; 1215874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, 1216874aeea5SJeff Kirsher "could not enable MSI-X\n"); 1217874aeea5SJeff Kirsher } 1218874aeea5SJeff Kirsher } 1219874aeea5SJeff Kirsher 1220874aeea5SJeff Kirsher /* Try single interrupt MSI */ 1221874aeea5SJeff Kirsher if (efx->interrupt_mode == EFX_INT_MODE_MSI) { 1222874aeea5SJeff Kirsher efx->n_channels = 1; 1223874aeea5SJeff Kirsher efx->n_rx_channels = 1; 1224874aeea5SJeff Kirsher efx->n_tx_channels = 1; 1225874aeea5SJeff Kirsher rc = pci_enable_msi(efx->pci_dev); 1226874aeea5SJeff Kirsher if (rc == 0) { 1227874aeea5SJeff Kirsher efx_get_channel(efx, 0)->irq = efx->pci_dev->irq; 1228874aeea5SJeff Kirsher } else { 1229874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, 1230874aeea5SJeff Kirsher "could not enable MSI\n"); 1231874aeea5SJeff Kirsher efx->interrupt_mode = EFX_INT_MODE_LEGACY; 1232874aeea5SJeff Kirsher } 1233874aeea5SJeff Kirsher } 1234874aeea5SJeff Kirsher 1235874aeea5SJeff Kirsher /* Assume legacy interrupts */ 1236874aeea5SJeff Kirsher if (efx->interrupt_mode == EFX_INT_MODE_LEGACY) { 1237874aeea5SJeff Kirsher efx->n_channels = 1 + (separate_tx_channels ? 1 : 0); 1238874aeea5SJeff Kirsher efx->n_rx_channels = 1; 1239874aeea5SJeff Kirsher efx->n_tx_channels = 1; 1240874aeea5SJeff Kirsher efx->legacy_irq = efx->pci_dev->irq; 1241874aeea5SJeff Kirsher } 1242874aeea5SJeff Kirsher 1243874aeea5SJeff Kirsher return 0; 1244874aeea5SJeff Kirsher } 1245874aeea5SJeff Kirsher 12469f2cb71cSBen Hutchings /* Enable interrupts, then probe and start the event queues */ 12479f2cb71cSBen Hutchings static void efx_start_interrupts(struct efx_nic *efx) 12489f2cb71cSBen Hutchings { 12499f2cb71cSBen Hutchings struct efx_channel *channel; 12509f2cb71cSBen Hutchings 12519f2cb71cSBen Hutchings if (efx->legacy_irq) 12529f2cb71cSBen Hutchings efx->legacy_irq_enabled = true; 12539f2cb71cSBen Hutchings efx_nic_enable_interrupts(efx); 12549f2cb71cSBen Hutchings 12559f2cb71cSBen Hutchings efx_for_each_channel(channel, efx) { 12569f2cb71cSBen Hutchings efx_init_eventq(channel); 12579f2cb71cSBen Hutchings efx_start_eventq(channel); 12589f2cb71cSBen Hutchings } 12599f2cb71cSBen Hutchings 12609f2cb71cSBen Hutchings efx_mcdi_mode_event(efx); 12619f2cb71cSBen Hutchings } 12629f2cb71cSBen Hutchings 12639f2cb71cSBen Hutchings static void efx_stop_interrupts(struct efx_nic *efx) 12649f2cb71cSBen Hutchings { 12659f2cb71cSBen Hutchings struct efx_channel *channel; 12669f2cb71cSBen Hutchings 12679f2cb71cSBen Hutchings efx_mcdi_mode_poll(efx); 12689f2cb71cSBen Hutchings 12699f2cb71cSBen Hutchings efx_nic_disable_interrupts(efx); 12709f2cb71cSBen Hutchings if (efx->legacy_irq) { 12719f2cb71cSBen Hutchings synchronize_irq(efx->legacy_irq); 12729f2cb71cSBen Hutchings efx->legacy_irq_enabled = false; 12739f2cb71cSBen Hutchings } 12749f2cb71cSBen Hutchings 12759f2cb71cSBen Hutchings efx_for_each_channel(channel, efx) { 12769f2cb71cSBen Hutchings if (channel->irq) 12779f2cb71cSBen Hutchings synchronize_irq(channel->irq); 12789f2cb71cSBen Hutchings 12799f2cb71cSBen Hutchings efx_stop_eventq(channel); 12809f2cb71cSBen Hutchings efx_fini_eventq(channel); 12819f2cb71cSBen Hutchings } 12829f2cb71cSBen Hutchings } 12839f2cb71cSBen Hutchings 1284874aeea5SJeff Kirsher static void efx_remove_interrupts(struct efx_nic *efx) 1285874aeea5SJeff Kirsher { 1286874aeea5SJeff Kirsher struct efx_channel *channel; 1287874aeea5SJeff Kirsher 1288874aeea5SJeff Kirsher /* Remove MSI/MSI-X interrupts */ 1289874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) 1290874aeea5SJeff Kirsher channel->irq = 0; 1291874aeea5SJeff Kirsher pci_disable_msi(efx->pci_dev); 1292874aeea5SJeff Kirsher pci_disable_msix(efx->pci_dev); 1293874aeea5SJeff Kirsher 1294874aeea5SJeff Kirsher /* Remove legacy interrupt */ 1295874aeea5SJeff Kirsher efx->legacy_irq = 0; 1296874aeea5SJeff Kirsher } 1297874aeea5SJeff Kirsher 1298874aeea5SJeff Kirsher static void efx_set_channels(struct efx_nic *efx) 1299874aeea5SJeff Kirsher { 1300874aeea5SJeff Kirsher struct efx_channel *channel; 1301874aeea5SJeff Kirsher struct efx_tx_queue *tx_queue; 1302874aeea5SJeff Kirsher 1303874aeea5SJeff Kirsher efx->tx_channel_offset = 1304874aeea5SJeff Kirsher separate_tx_channels ? efx->n_channels - efx->n_tx_channels : 0; 1305874aeea5SJeff Kirsher 1306874aeea5SJeff Kirsher /* We need to adjust the TX queue numbers if we have separate 1307874aeea5SJeff Kirsher * RX-only and TX-only channels. 1308874aeea5SJeff Kirsher */ 1309874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) { 1310874aeea5SJeff Kirsher efx_for_each_channel_tx_queue(tx_queue, channel) 1311874aeea5SJeff Kirsher tx_queue->queue -= (efx->tx_channel_offset * 1312874aeea5SJeff Kirsher EFX_TXQ_TYPES); 1313874aeea5SJeff Kirsher } 1314874aeea5SJeff Kirsher } 1315874aeea5SJeff Kirsher 1316874aeea5SJeff Kirsher static int efx_probe_nic(struct efx_nic *efx) 1317874aeea5SJeff Kirsher { 1318874aeea5SJeff Kirsher size_t i; 1319874aeea5SJeff Kirsher int rc; 1320874aeea5SJeff Kirsher 1321874aeea5SJeff Kirsher netif_dbg(efx, probe, efx->net_dev, "creating NIC\n"); 1322874aeea5SJeff Kirsher 1323874aeea5SJeff Kirsher /* Carry out hardware-type specific initialisation */ 1324874aeea5SJeff Kirsher rc = efx->type->probe(efx); 1325874aeea5SJeff Kirsher if (rc) 1326874aeea5SJeff Kirsher return rc; 1327874aeea5SJeff Kirsher 1328874aeea5SJeff Kirsher /* Determine the number of channels and queues by trying to hook 1329874aeea5SJeff Kirsher * in MSI-X interrupts. */ 1330874aeea5SJeff Kirsher rc = efx_probe_interrupts(efx); 1331874aeea5SJeff Kirsher if (rc) 1332874aeea5SJeff Kirsher goto fail; 1333874aeea5SJeff Kirsher 1334874aeea5SJeff Kirsher if (efx->n_channels > 1) 1335874aeea5SJeff Kirsher get_random_bytes(&efx->rx_hash_key, sizeof(efx->rx_hash_key)); 1336874aeea5SJeff Kirsher for (i = 0; i < ARRAY_SIZE(efx->rx_indir_table); i++) 1337278bc429SBen Hutchings efx->rx_indir_table[i] = 1338278bc429SBen Hutchings ethtool_rxfh_indir_default(i, efx->n_rx_channels); 1339874aeea5SJeff Kirsher 1340874aeea5SJeff Kirsher efx_set_channels(efx); 1341874aeea5SJeff Kirsher netif_set_real_num_tx_queues(efx->net_dev, efx->n_tx_channels); 1342874aeea5SJeff Kirsher netif_set_real_num_rx_queues(efx->net_dev, efx->n_rx_channels); 1343874aeea5SJeff Kirsher 1344874aeea5SJeff Kirsher /* Initialise the interrupt moderation settings */ 13459e393b30SBen Hutchings efx_init_irq_moderation(efx, tx_irq_mod_usec, rx_irq_mod_usec, true, 13469e393b30SBen Hutchings true); 1347874aeea5SJeff Kirsher 1348874aeea5SJeff Kirsher return 0; 1349874aeea5SJeff Kirsher 1350874aeea5SJeff Kirsher fail: 1351874aeea5SJeff Kirsher efx->type->remove(efx); 1352874aeea5SJeff Kirsher return rc; 1353874aeea5SJeff Kirsher } 1354874aeea5SJeff Kirsher 1355874aeea5SJeff Kirsher static void efx_remove_nic(struct efx_nic *efx) 1356874aeea5SJeff Kirsher { 1357874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "destroying NIC\n"); 1358874aeea5SJeff Kirsher 1359874aeea5SJeff Kirsher efx_remove_interrupts(efx); 1360874aeea5SJeff Kirsher efx->type->remove(efx); 1361874aeea5SJeff Kirsher } 1362874aeea5SJeff Kirsher 1363874aeea5SJeff Kirsher /************************************************************************** 1364874aeea5SJeff Kirsher * 1365874aeea5SJeff Kirsher * NIC startup/shutdown 1366874aeea5SJeff Kirsher * 1367874aeea5SJeff Kirsher *************************************************************************/ 1368874aeea5SJeff Kirsher 1369874aeea5SJeff Kirsher static int efx_probe_all(struct efx_nic *efx) 1370874aeea5SJeff Kirsher { 1371874aeea5SJeff Kirsher int rc; 1372874aeea5SJeff Kirsher 1373874aeea5SJeff Kirsher rc = efx_probe_nic(efx); 1374874aeea5SJeff Kirsher if (rc) { 1375874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, "failed to create NIC\n"); 1376874aeea5SJeff Kirsher goto fail1; 1377874aeea5SJeff Kirsher } 1378874aeea5SJeff Kirsher 1379874aeea5SJeff Kirsher rc = efx_probe_port(efx); 1380874aeea5SJeff Kirsher if (rc) { 1381874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, "failed to create port\n"); 1382874aeea5SJeff Kirsher goto fail2; 1383874aeea5SJeff Kirsher } 1384874aeea5SJeff Kirsher 1385874aeea5SJeff Kirsher efx->rxq_entries = efx->txq_entries = EFX_DEFAULT_DMAQ_SIZE; 1386874aeea5SJeff Kirsher rc = efx_probe_channels(efx); 1387874aeea5SJeff Kirsher if (rc) 1388874aeea5SJeff Kirsher goto fail3; 1389874aeea5SJeff Kirsher 1390874aeea5SJeff Kirsher rc = efx_probe_filters(efx); 1391874aeea5SJeff Kirsher if (rc) { 1392874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 1393874aeea5SJeff Kirsher "failed to create filter tables\n"); 1394874aeea5SJeff Kirsher goto fail4; 1395874aeea5SJeff Kirsher } 1396874aeea5SJeff Kirsher 1397874aeea5SJeff Kirsher return 0; 1398874aeea5SJeff Kirsher 1399874aeea5SJeff Kirsher fail4: 1400874aeea5SJeff Kirsher efx_remove_channels(efx); 1401874aeea5SJeff Kirsher fail3: 1402874aeea5SJeff Kirsher efx_remove_port(efx); 1403874aeea5SJeff Kirsher fail2: 1404874aeea5SJeff Kirsher efx_remove_nic(efx); 1405874aeea5SJeff Kirsher fail1: 1406874aeea5SJeff Kirsher return rc; 1407874aeea5SJeff Kirsher } 1408874aeea5SJeff Kirsher 14099f2cb71cSBen Hutchings /* Called after previous invocation(s) of efx_stop_all, restarts the port, 14109f2cb71cSBen Hutchings * kernel transmit queues and NAPI processing, and ensures that the port is 14119f2cb71cSBen Hutchings * scheduled to be reconfigured. This function is safe to call multiple 14129f2cb71cSBen Hutchings * times when the NIC is in any state. 14139f2cb71cSBen Hutchings */ 1414874aeea5SJeff Kirsher static void efx_start_all(struct efx_nic *efx) 1415874aeea5SJeff Kirsher { 1416874aeea5SJeff Kirsher EFX_ASSERT_RESET_SERIALISED(efx); 1417874aeea5SJeff Kirsher 1418874aeea5SJeff Kirsher /* Check that it is appropriate to restart the interface. All 1419874aeea5SJeff Kirsher * of these flags are safe to read under just the rtnl lock */ 1420874aeea5SJeff Kirsher if (efx->port_enabled) 1421874aeea5SJeff Kirsher return; 1422874aeea5SJeff Kirsher if ((efx->state != STATE_RUNNING) && (efx->state != STATE_INIT)) 1423874aeea5SJeff Kirsher return; 142473ba7b68SBen Hutchings if (!netif_running(efx->net_dev)) 1425874aeea5SJeff Kirsher return; 1426874aeea5SJeff Kirsher 1427874aeea5SJeff Kirsher efx_start_port(efx); 14289f2cb71cSBen Hutchings efx_start_datapath(efx); 1429874aeea5SJeff Kirsher 1430874aeea5SJeff Kirsher /* Start the hardware monitor if there is one. Otherwise (we're link 1431874aeea5SJeff Kirsher * event driven), we have to poll the PHY because after an event queue 1432874aeea5SJeff Kirsher * flush, we could have a missed a link state change */ 1433874aeea5SJeff Kirsher if (efx->type->monitor != NULL) { 1434874aeea5SJeff Kirsher queue_delayed_work(efx->workqueue, &efx->monitor_work, 1435874aeea5SJeff Kirsher efx_monitor_interval); 1436874aeea5SJeff Kirsher } else { 1437874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 1438874aeea5SJeff Kirsher if (efx->phy_op->poll(efx)) 1439874aeea5SJeff Kirsher efx_link_status_changed(efx); 1440874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 1441874aeea5SJeff Kirsher } 1442874aeea5SJeff Kirsher 1443874aeea5SJeff Kirsher efx->type->start_stats(efx); 1444874aeea5SJeff Kirsher } 1445874aeea5SJeff Kirsher 1446874aeea5SJeff Kirsher /* Flush all delayed work. Should only be called when no more delayed work 1447874aeea5SJeff Kirsher * will be scheduled. This doesn't flush pending online resets (efx_reset), 1448874aeea5SJeff Kirsher * since we're holding the rtnl_lock at this point. */ 1449874aeea5SJeff Kirsher static void efx_flush_all(struct efx_nic *efx) 1450874aeea5SJeff Kirsher { 1451874aeea5SJeff Kirsher /* Make sure the hardware monitor is stopped */ 1452874aeea5SJeff Kirsher cancel_delayed_work_sync(&efx->monitor_work); 1453874aeea5SJeff Kirsher /* Stop scheduled port reconfigurations */ 1454874aeea5SJeff Kirsher cancel_work_sync(&efx->mac_work); 1455874aeea5SJeff Kirsher } 1456874aeea5SJeff Kirsher 1457874aeea5SJeff Kirsher /* Quiesce hardware and software without bringing the link down. 1458874aeea5SJeff Kirsher * Safe to call multiple times, when the nic and interface is in any 1459874aeea5SJeff Kirsher * state. The caller is guaranteed to subsequently be in a position 1460874aeea5SJeff Kirsher * to modify any hardware and software state they see fit without 1461874aeea5SJeff Kirsher * taking locks. */ 1462874aeea5SJeff Kirsher static void efx_stop_all(struct efx_nic *efx) 1463874aeea5SJeff Kirsher { 1464874aeea5SJeff Kirsher EFX_ASSERT_RESET_SERIALISED(efx); 1465874aeea5SJeff Kirsher 1466874aeea5SJeff Kirsher /* port_enabled can be read safely under the rtnl lock */ 1467874aeea5SJeff Kirsher if (!efx->port_enabled) 1468874aeea5SJeff Kirsher return; 1469874aeea5SJeff Kirsher 1470874aeea5SJeff Kirsher efx->type->stop_stats(efx); 1471874aeea5SJeff Kirsher efx_stop_port(efx); 1472874aeea5SJeff Kirsher 1473874aeea5SJeff Kirsher /* Flush efx_mac_work(), refill_workqueue, monitor_work */ 1474874aeea5SJeff Kirsher efx_flush_all(efx); 1475874aeea5SJeff Kirsher 1476874aeea5SJeff Kirsher /* Stop the kernel transmit interface late, so the watchdog 1477874aeea5SJeff Kirsher * timer isn't ticking over the flush */ 14789f2cb71cSBen Hutchings netif_tx_disable(efx->net_dev); 14799f2cb71cSBen Hutchings 14809f2cb71cSBen Hutchings efx_stop_datapath(efx); 1481874aeea5SJeff Kirsher } 1482874aeea5SJeff Kirsher 1483874aeea5SJeff Kirsher static void efx_remove_all(struct efx_nic *efx) 1484874aeea5SJeff Kirsher { 1485874aeea5SJeff Kirsher efx_remove_filters(efx); 1486874aeea5SJeff Kirsher efx_remove_channels(efx); 1487874aeea5SJeff Kirsher efx_remove_port(efx); 1488874aeea5SJeff Kirsher efx_remove_nic(efx); 1489874aeea5SJeff Kirsher } 1490874aeea5SJeff Kirsher 1491874aeea5SJeff Kirsher /************************************************************************** 1492874aeea5SJeff Kirsher * 1493874aeea5SJeff Kirsher * Interrupt moderation 1494874aeea5SJeff Kirsher * 1495874aeea5SJeff Kirsher **************************************************************************/ 1496874aeea5SJeff Kirsher 1497cc180b69SBen Hutchings static unsigned int irq_mod_ticks(unsigned int usecs, unsigned int quantum_ns) 1498874aeea5SJeff Kirsher { 1499b548f976SBen Hutchings if (usecs == 0) 1500b548f976SBen Hutchings return 0; 1501cc180b69SBen Hutchings if (usecs * 1000 < quantum_ns) 1502874aeea5SJeff Kirsher return 1; /* never round down to 0 */ 1503cc180b69SBen Hutchings return usecs * 1000 / quantum_ns; 1504874aeea5SJeff Kirsher } 1505874aeea5SJeff Kirsher 1506874aeea5SJeff Kirsher /* Set interrupt moderation parameters */ 15079e393b30SBen Hutchings int efx_init_irq_moderation(struct efx_nic *efx, unsigned int tx_usecs, 15089e393b30SBen Hutchings unsigned int rx_usecs, bool rx_adaptive, 15099e393b30SBen Hutchings bool rx_may_override_tx) 1510874aeea5SJeff Kirsher { 1511874aeea5SJeff Kirsher struct efx_channel *channel; 1512cc180b69SBen Hutchings unsigned int irq_mod_max = DIV_ROUND_UP(efx->type->timer_period_max * 1513cc180b69SBen Hutchings efx->timer_quantum_ns, 1514cc180b69SBen Hutchings 1000); 1515cc180b69SBen Hutchings unsigned int tx_ticks; 1516cc180b69SBen Hutchings unsigned int rx_ticks; 1517874aeea5SJeff Kirsher 1518874aeea5SJeff Kirsher EFX_ASSERT_RESET_SERIALISED(efx); 1519874aeea5SJeff Kirsher 1520cc180b69SBen Hutchings if (tx_usecs > irq_mod_max || rx_usecs > irq_mod_max) 15219e393b30SBen Hutchings return -EINVAL; 15229e393b30SBen Hutchings 1523cc180b69SBen Hutchings tx_ticks = irq_mod_ticks(tx_usecs, efx->timer_quantum_ns); 1524cc180b69SBen Hutchings rx_ticks = irq_mod_ticks(rx_usecs, efx->timer_quantum_ns); 1525cc180b69SBen Hutchings 15269e393b30SBen Hutchings if (tx_ticks != rx_ticks && efx->tx_channel_offset == 0 && 15279e393b30SBen Hutchings !rx_may_override_tx) { 15289e393b30SBen Hutchings netif_err(efx, drv, efx->net_dev, "Channels are shared. " 15299e393b30SBen Hutchings "RX and TX IRQ moderation must be equal\n"); 15309e393b30SBen Hutchings return -EINVAL; 15319e393b30SBen Hutchings } 15329e393b30SBen Hutchings 1533874aeea5SJeff Kirsher efx->irq_rx_adaptive = rx_adaptive; 1534874aeea5SJeff Kirsher efx->irq_rx_moderation = rx_ticks; 1535874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) { 1536874aeea5SJeff Kirsher if (efx_channel_has_rx_queue(channel)) 1537874aeea5SJeff Kirsher channel->irq_moderation = rx_ticks; 1538874aeea5SJeff Kirsher else if (efx_channel_has_tx_queues(channel)) 1539874aeea5SJeff Kirsher channel->irq_moderation = tx_ticks; 1540874aeea5SJeff Kirsher } 15419e393b30SBen Hutchings 15429e393b30SBen Hutchings return 0; 1543874aeea5SJeff Kirsher } 1544874aeea5SJeff Kirsher 1545a0c4faf5SBen Hutchings void efx_get_irq_moderation(struct efx_nic *efx, unsigned int *tx_usecs, 1546a0c4faf5SBen Hutchings unsigned int *rx_usecs, bool *rx_adaptive) 1547a0c4faf5SBen Hutchings { 1548cc180b69SBen Hutchings /* We must round up when converting ticks to microseconds 1549cc180b69SBen Hutchings * because we round down when converting the other way. 1550cc180b69SBen Hutchings */ 1551cc180b69SBen Hutchings 1552a0c4faf5SBen Hutchings *rx_adaptive = efx->irq_rx_adaptive; 1553cc180b69SBen Hutchings *rx_usecs = DIV_ROUND_UP(efx->irq_rx_moderation * 1554cc180b69SBen Hutchings efx->timer_quantum_ns, 1555cc180b69SBen Hutchings 1000); 1556a0c4faf5SBen Hutchings 1557a0c4faf5SBen Hutchings /* If channels are shared between RX and TX, so is IRQ 1558a0c4faf5SBen Hutchings * moderation. Otherwise, IRQ moderation is the same for all 1559a0c4faf5SBen Hutchings * TX channels and is not adaptive. 1560a0c4faf5SBen Hutchings */ 1561a0c4faf5SBen Hutchings if (efx->tx_channel_offset == 0) 1562a0c4faf5SBen Hutchings *tx_usecs = *rx_usecs; 1563a0c4faf5SBen Hutchings else 1564cc180b69SBen Hutchings *tx_usecs = DIV_ROUND_UP( 1565a0c4faf5SBen Hutchings efx->channel[efx->tx_channel_offset]->irq_moderation * 1566cc180b69SBen Hutchings efx->timer_quantum_ns, 1567cc180b69SBen Hutchings 1000); 1568a0c4faf5SBen Hutchings } 1569a0c4faf5SBen Hutchings 1570874aeea5SJeff Kirsher /************************************************************************** 1571874aeea5SJeff Kirsher * 1572874aeea5SJeff Kirsher * Hardware monitor 1573874aeea5SJeff Kirsher * 1574874aeea5SJeff Kirsher **************************************************************************/ 1575874aeea5SJeff Kirsher 1576874aeea5SJeff Kirsher /* Run periodically off the general workqueue */ 1577874aeea5SJeff Kirsher static void efx_monitor(struct work_struct *data) 1578874aeea5SJeff Kirsher { 1579874aeea5SJeff Kirsher struct efx_nic *efx = container_of(data, struct efx_nic, 1580874aeea5SJeff Kirsher monitor_work.work); 1581874aeea5SJeff Kirsher 1582874aeea5SJeff Kirsher netif_vdbg(efx, timer, efx->net_dev, 1583874aeea5SJeff Kirsher "hardware monitor executing on CPU %d\n", 1584874aeea5SJeff Kirsher raw_smp_processor_id()); 1585874aeea5SJeff Kirsher BUG_ON(efx->type->monitor == NULL); 1586874aeea5SJeff Kirsher 1587874aeea5SJeff Kirsher /* If the mac_lock is already held then it is likely a port 1588874aeea5SJeff Kirsher * reconfiguration is already in place, which will likely do 1589874aeea5SJeff Kirsher * most of the work of monitor() anyway. */ 1590874aeea5SJeff Kirsher if (mutex_trylock(&efx->mac_lock)) { 1591874aeea5SJeff Kirsher if (efx->port_enabled) 1592874aeea5SJeff Kirsher efx->type->monitor(efx); 1593874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 1594874aeea5SJeff Kirsher } 1595874aeea5SJeff Kirsher 1596874aeea5SJeff Kirsher queue_delayed_work(efx->workqueue, &efx->monitor_work, 1597874aeea5SJeff Kirsher efx_monitor_interval); 1598874aeea5SJeff Kirsher } 1599874aeea5SJeff Kirsher 1600874aeea5SJeff Kirsher /************************************************************************** 1601874aeea5SJeff Kirsher * 1602874aeea5SJeff Kirsher * ioctls 1603874aeea5SJeff Kirsher * 1604874aeea5SJeff Kirsher *************************************************************************/ 1605874aeea5SJeff Kirsher 1606874aeea5SJeff Kirsher /* Net device ioctl 1607874aeea5SJeff Kirsher * Context: process, rtnl_lock() held. 1608874aeea5SJeff Kirsher */ 1609874aeea5SJeff Kirsher static int efx_ioctl(struct net_device *net_dev, struct ifreq *ifr, int cmd) 1610874aeea5SJeff Kirsher { 1611874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 1612874aeea5SJeff Kirsher struct mii_ioctl_data *data = if_mii(ifr); 1613874aeea5SJeff Kirsher 1614874aeea5SJeff Kirsher EFX_ASSERT_RESET_SERIALISED(efx); 1615874aeea5SJeff Kirsher 1616874aeea5SJeff Kirsher /* Convert phy_id from older PRTAD/DEVAD format */ 1617874aeea5SJeff Kirsher if ((cmd == SIOCGMIIREG || cmd == SIOCSMIIREG) && 1618874aeea5SJeff Kirsher (data->phy_id & 0xfc00) == 0x0400) 1619874aeea5SJeff Kirsher data->phy_id ^= MDIO_PHY_ID_C45 | 0x0400; 1620874aeea5SJeff Kirsher 1621874aeea5SJeff Kirsher return mdio_mii_ioctl(&efx->mdio, data, cmd); 1622874aeea5SJeff Kirsher } 1623874aeea5SJeff Kirsher 1624874aeea5SJeff Kirsher /************************************************************************** 1625874aeea5SJeff Kirsher * 1626874aeea5SJeff Kirsher * NAPI interface 1627874aeea5SJeff Kirsher * 1628874aeea5SJeff Kirsher **************************************************************************/ 1629874aeea5SJeff Kirsher 1630874aeea5SJeff Kirsher static void efx_init_napi(struct efx_nic *efx) 1631874aeea5SJeff Kirsher { 1632874aeea5SJeff Kirsher struct efx_channel *channel; 1633874aeea5SJeff Kirsher 1634874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) { 1635874aeea5SJeff Kirsher channel->napi_dev = efx->net_dev; 1636874aeea5SJeff Kirsher netif_napi_add(channel->napi_dev, &channel->napi_str, 1637874aeea5SJeff Kirsher efx_poll, napi_weight); 1638874aeea5SJeff Kirsher } 1639874aeea5SJeff Kirsher } 1640874aeea5SJeff Kirsher 1641874aeea5SJeff Kirsher static void efx_fini_napi_channel(struct efx_channel *channel) 1642874aeea5SJeff Kirsher { 1643874aeea5SJeff Kirsher if (channel->napi_dev) 1644874aeea5SJeff Kirsher netif_napi_del(&channel->napi_str); 1645874aeea5SJeff Kirsher channel->napi_dev = NULL; 1646874aeea5SJeff Kirsher } 1647874aeea5SJeff Kirsher 1648874aeea5SJeff Kirsher static void efx_fini_napi(struct efx_nic *efx) 1649874aeea5SJeff Kirsher { 1650874aeea5SJeff Kirsher struct efx_channel *channel; 1651874aeea5SJeff Kirsher 1652874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) 1653874aeea5SJeff Kirsher efx_fini_napi_channel(channel); 1654874aeea5SJeff Kirsher } 1655874aeea5SJeff Kirsher 1656874aeea5SJeff Kirsher /************************************************************************** 1657874aeea5SJeff Kirsher * 1658874aeea5SJeff Kirsher * Kernel netpoll interface 1659874aeea5SJeff Kirsher * 1660874aeea5SJeff Kirsher *************************************************************************/ 1661874aeea5SJeff Kirsher 1662874aeea5SJeff Kirsher #ifdef CONFIG_NET_POLL_CONTROLLER 1663874aeea5SJeff Kirsher 1664874aeea5SJeff Kirsher /* Although in the common case interrupts will be disabled, this is not 1665874aeea5SJeff Kirsher * guaranteed. However, all our work happens inside the NAPI callback, 1666874aeea5SJeff Kirsher * so no locking is required. 1667874aeea5SJeff Kirsher */ 1668874aeea5SJeff Kirsher static void efx_netpoll(struct net_device *net_dev) 1669874aeea5SJeff Kirsher { 1670874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 1671874aeea5SJeff Kirsher struct efx_channel *channel; 1672874aeea5SJeff Kirsher 1673874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) 1674874aeea5SJeff Kirsher efx_schedule_channel(channel); 1675874aeea5SJeff Kirsher } 1676874aeea5SJeff Kirsher 1677874aeea5SJeff Kirsher #endif 1678874aeea5SJeff Kirsher 1679874aeea5SJeff Kirsher /************************************************************************** 1680874aeea5SJeff Kirsher * 1681874aeea5SJeff Kirsher * Kernel net device interface 1682874aeea5SJeff Kirsher * 1683874aeea5SJeff Kirsher *************************************************************************/ 1684874aeea5SJeff Kirsher 1685874aeea5SJeff Kirsher /* Context: process, rtnl_lock() held. */ 1686874aeea5SJeff Kirsher static int efx_net_open(struct net_device *net_dev) 1687874aeea5SJeff Kirsher { 1688874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 1689874aeea5SJeff Kirsher EFX_ASSERT_RESET_SERIALISED(efx); 1690874aeea5SJeff Kirsher 1691874aeea5SJeff Kirsher netif_dbg(efx, ifup, efx->net_dev, "opening device on CPU %d\n", 1692874aeea5SJeff Kirsher raw_smp_processor_id()); 1693874aeea5SJeff Kirsher 1694874aeea5SJeff Kirsher if (efx->state == STATE_DISABLED) 1695874aeea5SJeff Kirsher return -EIO; 1696874aeea5SJeff Kirsher if (efx->phy_mode & PHY_MODE_SPECIAL) 1697874aeea5SJeff Kirsher return -EBUSY; 1698874aeea5SJeff Kirsher if (efx_mcdi_poll_reboot(efx) && efx_reset(efx, RESET_TYPE_ALL)) 1699874aeea5SJeff Kirsher return -EIO; 1700874aeea5SJeff Kirsher 1701874aeea5SJeff Kirsher /* Notify the kernel of the link state polled during driver load, 1702874aeea5SJeff Kirsher * before the monitor starts running */ 1703874aeea5SJeff Kirsher efx_link_status_changed(efx); 1704874aeea5SJeff Kirsher 1705874aeea5SJeff Kirsher efx_start_all(efx); 1706874aeea5SJeff Kirsher return 0; 1707874aeea5SJeff Kirsher } 1708874aeea5SJeff Kirsher 1709874aeea5SJeff Kirsher /* Context: process, rtnl_lock() held. 1710874aeea5SJeff Kirsher * Note that the kernel will ignore our return code; this method 1711874aeea5SJeff Kirsher * should really be a void. 1712874aeea5SJeff Kirsher */ 1713874aeea5SJeff Kirsher static int efx_net_stop(struct net_device *net_dev) 1714874aeea5SJeff Kirsher { 1715874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 1716874aeea5SJeff Kirsher 1717874aeea5SJeff Kirsher netif_dbg(efx, ifdown, efx->net_dev, "closing on CPU %d\n", 1718874aeea5SJeff Kirsher raw_smp_processor_id()); 1719874aeea5SJeff Kirsher 1720874aeea5SJeff Kirsher if (efx->state != STATE_DISABLED) { 1721874aeea5SJeff Kirsher /* Stop the device and flush all the channels */ 1722874aeea5SJeff Kirsher efx_stop_all(efx); 1723874aeea5SJeff Kirsher } 1724874aeea5SJeff Kirsher 1725874aeea5SJeff Kirsher return 0; 1726874aeea5SJeff Kirsher } 1727874aeea5SJeff Kirsher 1728874aeea5SJeff Kirsher /* Context: process, dev_base_lock or RTNL held, non-blocking. */ 17292aa9ef11SBen Hutchings static struct rtnl_link_stats64 *efx_net_stats(struct net_device *net_dev, 17302aa9ef11SBen Hutchings struct rtnl_link_stats64 *stats) 1731874aeea5SJeff Kirsher { 1732874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 1733874aeea5SJeff Kirsher struct efx_mac_stats *mac_stats = &efx->mac_stats; 1734874aeea5SJeff Kirsher 1735874aeea5SJeff Kirsher spin_lock_bh(&efx->stats_lock); 17361cb34522SBen Hutchings 1737874aeea5SJeff Kirsher efx->type->update_stats(efx); 1738874aeea5SJeff Kirsher 1739874aeea5SJeff Kirsher stats->rx_packets = mac_stats->rx_packets; 1740874aeea5SJeff Kirsher stats->tx_packets = mac_stats->tx_packets; 1741874aeea5SJeff Kirsher stats->rx_bytes = mac_stats->rx_bytes; 1742874aeea5SJeff Kirsher stats->tx_bytes = mac_stats->tx_bytes; 1743874aeea5SJeff Kirsher stats->rx_dropped = efx->n_rx_nodesc_drop_cnt; 1744874aeea5SJeff Kirsher stats->multicast = mac_stats->rx_multicast; 1745874aeea5SJeff Kirsher stats->collisions = mac_stats->tx_collision; 1746874aeea5SJeff Kirsher stats->rx_length_errors = (mac_stats->rx_gtjumbo + 1747874aeea5SJeff Kirsher mac_stats->rx_length_error); 1748874aeea5SJeff Kirsher stats->rx_crc_errors = mac_stats->rx_bad; 1749874aeea5SJeff Kirsher stats->rx_frame_errors = mac_stats->rx_align_error; 1750874aeea5SJeff Kirsher stats->rx_fifo_errors = mac_stats->rx_overflow; 1751874aeea5SJeff Kirsher stats->rx_missed_errors = mac_stats->rx_missed; 1752874aeea5SJeff Kirsher stats->tx_window_errors = mac_stats->tx_late_collision; 1753874aeea5SJeff Kirsher 1754874aeea5SJeff Kirsher stats->rx_errors = (stats->rx_length_errors + 1755874aeea5SJeff Kirsher stats->rx_crc_errors + 1756874aeea5SJeff Kirsher stats->rx_frame_errors + 1757874aeea5SJeff Kirsher mac_stats->rx_symbol_error); 1758874aeea5SJeff Kirsher stats->tx_errors = (stats->tx_window_errors + 1759874aeea5SJeff Kirsher mac_stats->tx_bad); 1760874aeea5SJeff Kirsher 17611cb34522SBen Hutchings spin_unlock_bh(&efx->stats_lock); 17621cb34522SBen Hutchings 1763874aeea5SJeff Kirsher return stats; 1764874aeea5SJeff Kirsher } 1765874aeea5SJeff Kirsher 1766874aeea5SJeff Kirsher /* Context: netif_tx_lock held, BHs disabled. */ 1767874aeea5SJeff Kirsher static void efx_watchdog(struct net_device *net_dev) 1768874aeea5SJeff Kirsher { 1769874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 1770874aeea5SJeff Kirsher 1771874aeea5SJeff Kirsher netif_err(efx, tx_err, efx->net_dev, 1772874aeea5SJeff Kirsher "TX stuck with port_enabled=%d: resetting channels\n", 1773874aeea5SJeff Kirsher efx->port_enabled); 1774874aeea5SJeff Kirsher 1775874aeea5SJeff Kirsher efx_schedule_reset(efx, RESET_TYPE_TX_WATCHDOG); 1776874aeea5SJeff Kirsher } 1777874aeea5SJeff Kirsher 1778874aeea5SJeff Kirsher 1779874aeea5SJeff Kirsher /* Context: process, rtnl_lock() held. */ 1780874aeea5SJeff Kirsher static int efx_change_mtu(struct net_device *net_dev, int new_mtu) 1781874aeea5SJeff Kirsher { 1782874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 1783874aeea5SJeff Kirsher 1784874aeea5SJeff Kirsher EFX_ASSERT_RESET_SERIALISED(efx); 1785874aeea5SJeff Kirsher 1786874aeea5SJeff Kirsher if (new_mtu > EFX_MAX_MTU) 1787874aeea5SJeff Kirsher return -EINVAL; 1788874aeea5SJeff Kirsher 1789874aeea5SJeff Kirsher efx_stop_all(efx); 1790874aeea5SJeff Kirsher 1791874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "changing MTU to %d\n", new_mtu); 1792874aeea5SJeff Kirsher 1793874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 1794874aeea5SJeff Kirsher /* Reconfigure the MAC before enabling the dma queues so that 1795874aeea5SJeff Kirsher * the RX buffers don't overflow */ 1796874aeea5SJeff Kirsher net_dev->mtu = new_mtu; 1797710b208dSBen Hutchings efx->type->reconfigure_mac(efx); 1798874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 1799874aeea5SJeff Kirsher 1800874aeea5SJeff Kirsher efx_start_all(efx); 18016c8eef4aSBen Hutchings return 0; 1802874aeea5SJeff Kirsher } 1803874aeea5SJeff Kirsher 1804874aeea5SJeff Kirsher static int efx_set_mac_address(struct net_device *net_dev, void *data) 1805874aeea5SJeff Kirsher { 1806874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 1807874aeea5SJeff Kirsher struct sockaddr *addr = data; 1808874aeea5SJeff Kirsher char *new_addr = addr->sa_data; 1809874aeea5SJeff Kirsher 1810874aeea5SJeff Kirsher EFX_ASSERT_RESET_SERIALISED(efx); 1811874aeea5SJeff Kirsher 1812874aeea5SJeff Kirsher if (!is_valid_ether_addr(new_addr)) { 1813874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, 1814874aeea5SJeff Kirsher "invalid ethernet MAC address requested: %pM\n", 1815874aeea5SJeff Kirsher new_addr); 1816874aeea5SJeff Kirsher return -EINVAL; 1817874aeea5SJeff Kirsher } 1818874aeea5SJeff Kirsher 1819874aeea5SJeff Kirsher memcpy(net_dev->dev_addr, new_addr, net_dev->addr_len); 1820874aeea5SJeff Kirsher 1821874aeea5SJeff Kirsher /* Reconfigure the MAC */ 1822874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 1823710b208dSBen Hutchings efx->type->reconfigure_mac(efx); 1824874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 1825874aeea5SJeff Kirsher 1826874aeea5SJeff Kirsher return 0; 1827874aeea5SJeff Kirsher } 1828874aeea5SJeff Kirsher 1829874aeea5SJeff Kirsher /* Context: netif_addr_lock held, BHs disabled. */ 18300fca8c97SBen Hutchings static void efx_set_rx_mode(struct net_device *net_dev) 1831874aeea5SJeff Kirsher { 1832874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 1833874aeea5SJeff Kirsher struct netdev_hw_addr *ha; 1834874aeea5SJeff Kirsher union efx_multicast_hash *mc_hash = &efx->multicast_hash; 1835874aeea5SJeff Kirsher u32 crc; 1836874aeea5SJeff Kirsher int bit; 1837874aeea5SJeff Kirsher 1838874aeea5SJeff Kirsher efx->promiscuous = !!(net_dev->flags & IFF_PROMISC); 1839874aeea5SJeff Kirsher 1840874aeea5SJeff Kirsher /* Build multicast hash table */ 1841874aeea5SJeff Kirsher if (efx->promiscuous || (net_dev->flags & IFF_ALLMULTI)) { 1842874aeea5SJeff Kirsher memset(mc_hash, 0xff, sizeof(*mc_hash)); 1843874aeea5SJeff Kirsher } else { 1844874aeea5SJeff Kirsher memset(mc_hash, 0x00, sizeof(*mc_hash)); 1845874aeea5SJeff Kirsher netdev_for_each_mc_addr(ha, net_dev) { 1846874aeea5SJeff Kirsher crc = ether_crc_le(ETH_ALEN, ha->addr); 1847874aeea5SJeff Kirsher bit = crc & (EFX_MCAST_HASH_ENTRIES - 1); 1848874aeea5SJeff Kirsher set_bit_le(bit, mc_hash->byte); 1849874aeea5SJeff Kirsher } 1850874aeea5SJeff Kirsher 1851874aeea5SJeff Kirsher /* Broadcast packets go through the multicast hash filter. 1852874aeea5SJeff Kirsher * ether_crc_le() of the broadcast address is 0xbe2612ff 1853874aeea5SJeff Kirsher * so we always add bit 0xff to the mask. 1854874aeea5SJeff Kirsher */ 1855874aeea5SJeff Kirsher set_bit_le(0xff, mc_hash->byte); 1856874aeea5SJeff Kirsher } 1857874aeea5SJeff Kirsher 1858874aeea5SJeff Kirsher if (efx->port_enabled) 1859874aeea5SJeff Kirsher queue_work(efx->workqueue, &efx->mac_work); 1860874aeea5SJeff Kirsher /* Otherwise efx_start_port() will do this */ 1861874aeea5SJeff Kirsher } 1862874aeea5SJeff Kirsher 1863c8f44affSMichał Mirosław static int efx_set_features(struct net_device *net_dev, netdev_features_t data) 1864874aeea5SJeff Kirsher { 1865874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 1866874aeea5SJeff Kirsher 1867874aeea5SJeff Kirsher /* If disabling RX n-tuple filtering, clear existing filters */ 1868874aeea5SJeff Kirsher if (net_dev->features & ~data & NETIF_F_NTUPLE) 1869874aeea5SJeff Kirsher efx_filter_clear_rx(efx, EFX_FILTER_PRI_MANUAL); 1870874aeea5SJeff Kirsher 1871874aeea5SJeff Kirsher return 0; 1872874aeea5SJeff Kirsher } 1873874aeea5SJeff Kirsher 1874874aeea5SJeff Kirsher static const struct net_device_ops efx_netdev_ops = { 1875874aeea5SJeff Kirsher .ndo_open = efx_net_open, 1876874aeea5SJeff Kirsher .ndo_stop = efx_net_stop, 1877874aeea5SJeff Kirsher .ndo_get_stats64 = efx_net_stats, 1878874aeea5SJeff Kirsher .ndo_tx_timeout = efx_watchdog, 1879874aeea5SJeff Kirsher .ndo_start_xmit = efx_hard_start_xmit, 1880874aeea5SJeff Kirsher .ndo_validate_addr = eth_validate_addr, 1881874aeea5SJeff Kirsher .ndo_do_ioctl = efx_ioctl, 1882874aeea5SJeff Kirsher .ndo_change_mtu = efx_change_mtu, 1883874aeea5SJeff Kirsher .ndo_set_mac_address = efx_set_mac_address, 18840fca8c97SBen Hutchings .ndo_set_rx_mode = efx_set_rx_mode, 1885874aeea5SJeff Kirsher .ndo_set_features = efx_set_features, 1886874aeea5SJeff Kirsher #ifdef CONFIG_NET_POLL_CONTROLLER 1887874aeea5SJeff Kirsher .ndo_poll_controller = efx_netpoll, 1888874aeea5SJeff Kirsher #endif 1889874aeea5SJeff Kirsher .ndo_setup_tc = efx_setup_tc, 1890874aeea5SJeff Kirsher #ifdef CONFIG_RFS_ACCEL 1891874aeea5SJeff Kirsher .ndo_rx_flow_steer = efx_filter_rfs, 1892874aeea5SJeff Kirsher #endif 1893874aeea5SJeff Kirsher }; 1894874aeea5SJeff Kirsher 1895874aeea5SJeff Kirsher static void efx_update_name(struct efx_nic *efx) 1896874aeea5SJeff Kirsher { 1897874aeea5SJeff Kirsher strcpy(efx->name, efx->net_dev->name); 1898874aeea5SJeff Kirsher efx_mtd_rename(efx); 1899874aeea5SJeff Kirsher efx_set_channel_names(efx); 1900874aeea5SJeff Kirsher } 1901874aeea5SJeff Kirsher 1902874aeea5SJeff Kirsher static int efx_netdev_event(struct notifier_block *this, 1903874aeea5SJeff Kirsher unsigned long event, void *ptr) 1904874aeea5SJeff Kirsher { 1905874aeea5SJeff Kirsher struct net_device *net_dev = ptr; 1906874aeea5SJeff Kirsher 1907874aeea5SJeff Kirsher if (net_dev->netdev_ops == &efx_netdev_ops && 1908874aeea5SJeff Kirsher event == NETDEV_CHANGENAME) 1909874aeea5SJeff Kirsher efx_update_name(netdev_priv(net_dev)); 1910874aeea5SJeff Kirsher 1911874aeea5SJeff Kirsher return NOTIFY_DONE; 1912874aeea5SJeff Kirsher } 1913874aeea5SJeff Kirsher 1914874aeea5SJeff Kirsher static struct notifier_block efx_netdev_notifier = { 1915874aeea5SJeff Kirsher .notifier_call = efx_netdev_event, 1916874aeea5SJeff Kirsher }; 1917874aeea5SJeff Kirsher 1918874aeea5SJeff Kirsher static ssize_t 1919874aeea5SJeff Kirsher show_phy_type(struct device *dev, struct device_attribute *attr, char *buf) 1920874aeea5SJeff Kirsher { 1921874aeea5SJeff Kirsher struct efx_nic *efx = pci_get_drvdata(to_pci_dev(dev)); 1922874aeea5SJeff Kirsher return sprintf(buf, "%d\n", efx->phy_type); 1923874aeea5SJeff Kirsher } 1924874aeea5SJeff Kirsher static DEVICE_ATTR(phy_type, 0644, show_phy_type, NULL); 1925874aeea5SJeff Kirsher 1926874aeea5SJeff Kirsher static int efx_register_netdev(struct efx_nic *efx) 1927874aeea5SJeff Kirsher { 1928874aeea5SJeff Kirsher struct net_device *net_dev = efx->net_dev; 1929874aeea5SJeff Kirsher struct efx_channel *channel; 1930874aeea5SJeff Kirsher int rc; 1931874aeea5SJeff Kirsher 1932874aeea5SJeff Kirsher net_dev->watchdog_timeo = 5 * HZ; 1933874aeea5SJeff Kirsher net_dev->irq = efx->pci_dev->irq; 1934874aeea5SJeff Kirsher net_dev->netdev_ops = &efx_netdev_ops; 1935874aeea5SJeff Kirsher SET_ETHTOOL_OPS(net_dev, &efx_ethtool_ops); 1936874aeea5SJeff Kirsher 1937874aeea5SJeff Kirsher rtnl_lock(); 1938874aeea5SJeff Kirsher 1939874aeea5SJeff Kirsher rc = dev_alloc_name(net_dev, net_dev->name); 1940874aeea5SJeff Kirsher if (rc < 0) 1941874aeea5SJeff Kirsher goto fail_locked; 1942874aeea5SJeff Kirsher efx_update_name(efx); 1943874aeea5SJeff Kirsher 1944874aeea5SJeff Kirsher rc = register_netdevice(net_dev); 1945874aeea5SJeff Kirsher if (rc) 1946874aeea5SJeff Kirsher goto fail_locked; 1947874aeea5SJeff Kirsher 1948874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) { 1949874aeea5SJeff Kirsher struct efx_tx_queue *tx_queue; 1950874aeea5SJeff Kirsher efx_for_each_channel_tx_queue(tx_queue, channel) 1951874aeea5SJeff Kirsher efx_init_tx_queue_core_txq(tx_queue); 1952874aeea5SJeff Kirsher } 1953874aeea5SJeff Kirsher 1954874aeea5SJeff Kirsher /* Always start with carrier off; PHY events will detect the link */ 195586ee5302SBen Hutchings netif_carrier_off(net_dev); 1956874aeea5SJeff Kirsher 1957874aeea5SJeff Kirsher rtnl_unlock(); 1958874aeea5SJeff Kirsher 1959874aeea5SJeff Kirsher rc = device_create_file(&efx->pci_dev->dev, &dev_attr_phy_type); 1960874aeea5SJeff Kirsher if (rc) { 1961874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, 1962874aeea5SJeff Kirsher "failed to init net dev attributes\n"); 1963874aeea5SJeff Kirsher goto fail_registered; 1964874aeea5SJeff Kirsher } 1965874aeea5SJeff Kirsher 1966874aeea5SJeff Kirsher return 0; 1967874aeea5SJeff Kirsher 1968874aeea5SJeff Kirsher fail_locked: 1969874aeea5SJeff Kirsher rtnl_unlock(); 1970874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, "could not register net dev\n"); 1971874aeea5SJeff Kirsher return rc; 1972874aeea5SJeff Kirsher 1973874aeea5SJeff Kirsher fail_registered: 1974874aeea5SJeff Kirsher unregister_netdev(net_dev); 1975874aeea5SJeff Kirsher return rc; 1976874aeea5SJeff Kirsher } 1977874aeea5SJeff Kirsher 1978874aeea5SJeff Kirsher static void efx_unregister_netdev(struct efx_nic *efx) 1979874aeea5SJeff Kirsher { 1980874aeea5SJeff Kirsher struct efx_channel *channel; 1981874aeea5SJeff Kirsher struct efx_tx_queue *tx_queue; 1982874aeea5SJeff Kirsher 1983874aeea5SJeff Kirsher if (!efx->net_dev) 1984874aeea5SJeff Kirsher return; 1985874aeea5SJeff Kirsher 1986874aeea5SJeff Kirsher BUG_ON(netdev_priv(efx->net_dev) != efx); 1987874aeea5SJeff Kirsher 1988874aeea5SJeff Kirsher /* Free up any skbs still remaining. This has to happen before 1989874aeea5SJeff Kirsher * we try to unregister the netdev as running their destructors 1990874aeea5SJeff Kirsher * may be needed to get the device ref. count to 0. */ 1991874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) { 1992874aeea5SJeff Kirsher efx_for_each_channel_tx_queue(tx_queue, channel) 1993874aeea5SJeff Kirsher efx_release_tx_buffers(tx_queue); 1994874aeea5SJeff Kirsher } 1995874aeea5SJeff Kirsher 1996874aeea5SJeff Kirsher strlcpy(efx->name, pci_name(efx->pci_dev), sizeof(efx->name)); 1997874aeea5SJeff Kirsher device_remove_file(&efx->pci_dev->dev, &dev_attr_phy_type); 1998874aeea5SJeff Kirsher unregister_netdev(efx->net_dev); 1999874aeea5SJeff Kirsher } 2000874aeea5SJeff Kirsher 2001874aeea5SJeff Kirsher /************************************************************************** 2002874aeea5SJeff Kirsher * 2003874aeea5SJeff Kirsher * Device reset and suspend 2004874aeea5SJeff Kirsher * 2005874aeea5SJeff Kirsher **************************************************************************/ 2006874aeea5SJeff Kirsher 2007874aeea5SJeff Kirsher /* Tears down the entire software state and most of the hardware state 2008874aeea5SJeff Kirsher * before reset. */ 2009874aeea5SJeff Kirsher void efx_reset_down(struct efx_nic *efx, enum reset_type method) 2010874aeea5SJeff Kirsher { 2011874aeea5SJeff Kirsher EFX_ASSERT_RESET_SERIALISED(efx); 2012874aeea5SJeff Kirsher 2013874aeea5SJeff Kirsher efx_stop_all(efx); 2014874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 2015874aeea5SJeff Kirsher 20169f2cb71cSBen Hutchings efx_stop_interrupts(efx); 2017874aeea5SJeff Kirsher if (efx->port_initialized && method != RESET_TYPE_INVISIBLE) 2018874aeea5SJeff Kirsher efx->phy_op->fini(efx); 2019874aeea5SJeff Kirsher efx->type->fini(efx); 2020874aeea5SJeff Kirsher } 2021874aeea5SJeff Kirsher 2022874aeea5SJeff Kirsher /* This function will always ensure that the locks acquired in 2023874aeea5SJeff Kirsher * efx_reset_down() are released. A failure return code indicates 2024874aeea5SJeff Kirsher * that we were unable to reinitialise the hardware, and the 2025874aeea5SJeff Kirsher * driver should be disabled. If ok is false, then the rx and tx 2026874aeea5SJeff Kirsher * engines are not restarted, pending a RESET_DISABLE. */ 2027874aeea5SJeff Kirsher int efx_reset_up(struct efx_nic *efx, enum reset_type method, bool ok) 2028874aeea5SJeff Kirsher { 2029874aeea5SJeff Kirsher int rc; 2030874aeea5SJeff Kirsher 2031874aeea5SJeff Kirsher EFX_ASSERT_RESET_SERIALISED(efx); 2032874aeea5SJeff Kirsher 2033874aeea5SJeff Kirsher rc = efx->type->init(efx); 2034874aeea5SJeff Kirsher if (rc) { 2035874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, "failed to initialise NIC\n"); 2036874aeea5SJeff Kirsher goto fail; 2037874aeea5SJeff Kirsher } 2038874aeea5SJeff Kirsher 2039874aeea5SJeff Kirsher if (!ok) 2040874aeea5SJeff Kirsher goto fail; 2041874aeea5SJeff Kirsher 2042874aeea5SJeff Kirsher if (efx->port_initialized && method != RESET_TYPE_INVISIBLE) { 2043874aeea5SJeff Kirsher rc = efx->phy_op->init(efx); 2044874aeea5SJeff Kirsher if (rc) 2045874aeea5SJeff Kirsher goto fail; 2046874aeea5SJeff Kirsher if (efx->phy_op->reconfigure(efx)) 2047874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, 2048874aeea5SJeff Kirsher "could not restore PHY settings\n"); 2049874aeea5SJeff Kirsher } 2050874aeea5SJeff Kirsher 2051710b208dSBen Hutchings efx->type->reconfigure_mac(efx); 2052874aeea5SJeff Kirsher 20539f2cb71cSBen Hutchings efx_start_interrupts(efx); 2054874aeea5SJeff Kirsher efx_restore_filters(efx); 2055874aeea5SJeff Kirsher 2056874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 2057874aeea5SJeff Kirsher 2058874aeea5SJeff Kirsher efx_start_all(efx); 2059874aeea5SJeff Kirsher 2060874aeea5SJeff Kirsher return 0; 2061874aeea5SJeff Kirsher 2062874aeea5SJeff Kirsher fail: 2063874aeea5SJeff Kirsher efx->port_initialized = false; 2064874aeea5SJeff Kirsher 2065874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 2066874aeea5SJeff Kirsher 2067874aeea5SJeff Kirsher return rc; 2068874aeea5SJeff Kirsher } 2069874aeea5SJeff Kirsher 2070874aeea5SJeff Kirsher /* Reset the NIC using the specified method. Note that the reset may 2071874aeea5SJeff Kirsher * fail, in which case the card will be left in an unusable state. 2072874aeea5SJeff Kirsher * 2073874aeea5SJeff Kirsher * Caller must hold the rtnl_lock. 2074874aeea5SJeff Kirsher */ 2075874aeea5SJeff Kirsher int efx_reset(struct efx_nic *efx, enum reset_type method) 2076874aeea5SJeff Kirsher { 2077874aeea5SJeff Kirsher int rc, rc2; 2078874aeea5SJeff Kirsher bool disabled; 2079874aeea5SJeff Kirsher 2080874aeea5SJeff Kirsher netif_info(efx, drv, efx->net_dev, "resetting (%s)\n", 2081874aeea5SJeff Kirsher RESET_TYPE(method)); 2082874aeea5SJeff Kirsher 2083874aeea5SJeff Kirsher netif_device_detach(efx->net_dev); 2084874aeea5SJeff Kirsher efx_reset_down(efx, method); 2085874aeea5SJeff Kirsher 2086874aeea5SJeff Kirsher rc = efx->type->reset(efx, method); 2087874aeea5SJeff Kirsher if (rc) { 2088874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, "failed to reset hardware\n"); 2089874aeea5SJeff Kirsher goto out; 2090874aeea5SJeff Kirsher } 2091874aeea5SJeff Kirsher 2092874aeea5SJeff Kirsher /* Clear flags for the scopes we covered. We assume the NIC and 2093874aeea5SJeff Kirsher * driver are now quiescent so that there is no race here. 2094874aeea5SJeff Kirsher */ 2095874aeea5SJeff Kirsher efx->reset_pending &= -(1 << (method + 1)); 2096874aeea5SJeff Kirsher 2097874aeea5SJeff Kirsher /* Reinitialise bus-mastering, which may have been turned off before 2098874aeea5SJeff Kirsher * the reset was scheduled. This is still appropriate, even in the 2099874aeea5SJeff Kirsher * RESET_TYPE_DISABLE since this driver generally assumes the hardware 2100874aeea5SJeff Kirsher * can respond to requests. */ 2101874aeea5SJeff Kirsher pci_set_master(efx->pci_dev); 2102874aeea5SJeff Kirsher 2103874aeea5SJeff Kirsher out: 2104874aeea5SJeff Kirsher /* Leave device stopped if necessary */ 2105874aeea5SJeff Kirsher disabled = rc || method == RESET_TYPE_DISABLE; 2106874aeea5SJeff Kirsher rc2 = efx_reset_up(efx, method, !disabled); 2107874aeea5SJeff Kirsher if (rc2) { 2108874aeea5SJeff Kirsher disabled = true; 2109874aeea5SJeff Kirsher if (!rc) 2110874aeea5SJeff Kirsher rc = rc2; 2111874aeea5SJeff Kirsher } 2112874aeea5SJeff Kirsher 2113874aeea5SJeff Kirsher if (disabled) { 2114874aeea5SJeff Kirsher dev_close(efx->net_dev); 2115874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, "has been disabled\n"); 2116874aeea5SJeff Kirsher efx->state = STATE_DISABLED; 2117874aeea5SJeff Kirsher } else { 2118874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "reset complete\n"); 2119874aeea5SJeff Kirsher netif_device_attach(efx->net_dev); 2120874aeea5SJeff Kirsher } 2121874aeea5SJeff Kirsher return rc; 2122874aeea5SJeff Kirsher } 2123874aeea5SJeff Kirsher 2124874aeea5SJeff Kirsher /* The worker thread exists so that code that cannot sleep can 2125874aeea5SJeff Kirsher * schedule a reset for later. 2126874aeea5SJeff Kirsher */ 2127874aeea5SJeff Kirsher static void efx_reset_work(struct work_struct *data) 2128874aeea5SJeff Kirsher { 2129874aeea5SJeff Kirsher struct efx_nic *efx = container_of(data, struct efx_nic, reset_work); 2130874aeea5SJeff Kirsher unsigned long pending = ACCESS_ONCE(efx->reset_pending); 2131874aeea5SJeff Kirsher 2132874aeea5SJeff Kirsher if (!pending) 2133874aeea5SJeff Kirsher return; 2134874aeea5SJeff Kirsher 2135874aeea5SJeff Kirsher /* If we're not RUNNING then don't reset. Leave the reset_pending 2136874aeea5SJeff Kirsher * flags set so that efx_pci_probe_main will be retried */ 2137874aeea5SJeff Kirsher if (efx->state != STATE_RUNNING) { 2138874aeea5SJeff Kirsher netif_info(efx, drv, efx->net_dev, 2139874aeea5SJeff Kirsher "scheduled reset quenched. NIC not RUNNING\n"); 2140874aeea5SJeff Kirsher return; 2141874aeea5SJeff Kirsher } 2142874aeea5SJeff Kirsher 2143874aeea5SJeff Kirsher rtnl_lock(); 2144874aeea5SJeff Kirsher (void)efx_reset(efx, fls(pending) - 1); 2145874aeea5SJeff Kirsher rtnl_unlock(); 2146874aeea5SJeff Kirsher } 2147874aeea5SJeff Kirsher 2148874aeea5SJeff Kirsher void efx_schedule_reset(struct efx_nic *efx, enum reset_type type) 2149874aeea5SJeff Kirsher { 2150874aeea5SJeff Kirsher enum reset_type method; 2151874aeea5SJeff Kirsher 2152874aeea5SJeff Kirsher switch (type) { 2153874aeea5SJeff Kirsher case RESET_TYPE_INVISIBLE: 2154874aeea5SJeff Kirsher case RESET_TYPE_ALL: 2155874aeea5SJeff Kirsher case RESET_TYPE_WORLD: 2156874aeea5SJeff Kirsher case RESET_TYPE_DISABLE: 2157874aeea5SJeff Kirsher method = type; 2158874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "scheduling %s reset\n", 2159874aeea5SJeff Kirsher RESET_TYPE(method)); 2160874aeea5SJeff Kirsher break; 2161874aeea5SJeff Kirsher default: 2162874aeea5SJeff Kirsher method = efx->type->map_reset_reason(type); 2163874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, 2164874aeea5SJeff Kirsher "scheduling %s reset for %s\n", 2165874aeea5SJeff Kirsher RESET_TYPE(method), RESET_TYPE(type)); 2166874aeea5SJeff Kirsher break; 2167874aeea5SJeff Kirsher } 2168874aeea5SJeff Kirsher 2169874aeea5SJeff Kirsher set_bit(method, &efx->reset_pending); 2170874aeea5SJeff Kirsher 2171874aeea5SJeff Kirsher /* efx_process_channel() will no longer read events once a 2172874aeea5SJeff Kirsher * reset is scheduled. So switch back to poll'd MCDI completions. */ 2173874aeea5SJeff Kirsher efx_mcdi_mode_poll(efx); 2174874aeea5SJeff Kirsher 2175874aeea5SJeff Kirsher queue_work(reset_workqueue, &efx->reset_work); 2176874aeea5SJeff Kirsher } 2177874aeea5SJeff Kirsher 2178874aeea5SJeff Kirsher /************************************************************************** 2179874aeea5SJeff Kirsher * 2180874aeea5SJeff Kirsher * List of NICs we support 2181874aeea5SJeff Kirsher * 2182874aeea5SJeff Kirsher **************************************************************************/ 2183874aeea5SJeff Kirsher 2184874aeea5SJeff Kirsher /* PCI device ID table */ 2185874aeea5SJeff Kirsher static DEFINE_PCI_DEVICE_TABLE(efx_pci_table) = { 21860e59e7e7SLinus Torvalds {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 21870e59e7e7SLinus Torvalds PCI_DEVICE_ID_SOLARFLARE_SFC4000A_0), 2188874aeea5SJeff Kirsher .driver_data = (unsigned long) &falcon_a1_nic_type}, 21890e59e7e7SLinus Torvalds {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 21900e59e7e7SLinus Torvalds PCI_DEVICE_ID_SOLARFLARE_SFC4000B), 2191874aeea5SJeff Kirsher .driver_data = (unsigned long) &falcon_b0_nic_type}, 2192547c474fSBen Hutchings {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0803), /* SFC9020 */ 2193874aeea5SJeff Kirsher .driver_data = (unsigned long) &siena_a0_nic_type}, 2194547c474fSBen Hutchings {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0813), /* SFL9021 */ 2195874aeea5SJeff Kirsher .driver_data = (unsigned long) &siena_a0_nic_type}, 2196874aeea5SJeff Kirsher {0} /* end of list */ 2197874aeea5SJeff Kirsher }; 2198874aeea5SJeff Kirsher 2199874aeea5SJeff Kirsher /************************************************************************** 2200874aeea5SJeff Kirsher * 2201874aeea5SJeff Kirsher * Dummy PHY/MAC operations 2202874aeea5SJeff Kirsher * 2203874aeea5SJeff Kirsher * Can be used for some unimplemented operations 2204874aeea5SJeff Kirsher * Needed so all function pointers are valid and do not have to be tested 2205874aeea5SJeff Kirsher * before use 2206874aeea5SJeff Kirsher * 2207874aeea5SJeff Kirsher **************************************************************************/ 2208874aeea5SJeff Kirsher int efx_port_dummy_op_int(struct efx_nic *efx) 2209874aeea5SJeff Kirsher { 2210874aeea5SJeff Kirsher return 0; 2211874aeea5SJeff Kirsher } 2212874aeea5SJeff Kirsher void efx_port_dummy_op_void(struct efx_nic *efx) {} 2213874aeea5SJeff Kirsher 2214874aeea5SJeff Kirsher static bool efx_port_dummy_op_poll(struct efx_nic *efx) 2215874aeea5SJeff Kirsher { 2216874aeea5SJeff Kirsher return false; 2217874aeea5SJeff Kirsher } 2218874aeea5SJeff Kirsher 2219874aeea5SJeff Kirsher static const struct efx_phy_operations efx_dummy_phy_operations = { 2220874aeea5SJeff Kirsher .init = efx_port_dummy_op_int, 2221874aeea5SJeff Kirsher .reconfigure = efx_port_dummy_op_int, 2222874aeea5SJeff Kirsher .poll = efx_port_dummy_op_poll, 2223874aeea5SJeff Kirsher .fini = efx_port_dummy_op_void, 2224874aeea5SJeff Kirsher }; 2225874aeea5SJeff Kirsher 2226874aeea5SJeff Kirsher /************************************************************************** 2227874aeea5SJeff Kirsher * 2228874aeea5SJeff Kirsher * Data housekeeping 2229874aeea5SJeff Kirsher * 2230874aeea5SJeff Kirsher **************************************************************************/ 2231874aeea5SJeff Kirsher 2232874aeea5SJeff Kirsher /* This zeroes out and then fills in the invariants in a struct 2233874aeea5SJeff Kirsher * efx_nic (including all sub-structures). 2234874aeea5SJeff Kirsher */ 2235874aeea5SJeff Kirsher static int efx_init_struct(struct efx_nic *efx, const struct efx_nic_type *type, 2236874aeea5SJeff Kirsher struct pci_dev *pci_dev, struct net_device *net_dev) 2237874aeea5SJeff Kirsher { 2238874aeea5SJeff Kirsher int i; 2239874aeea5SJeff Kirsher 2240874aeea5SJeff Kirsher /* Initialise common structures */ 2241874aeea5SJeff Kirsher memset(efx, 0, sizeof(*efx)); 2242874aeea5SJeff Kirsher spin_lock_init(&efx->biu_lock); 2243874aeea5SJeff Kirsher #ifdef CONFIG_SFC_MTD 2244874aeea5SJeff Kirsher INIT_LIST_HEAD(&efx->mtd_list); 2245874aeea5SJeff Kirsher #endif 2246874aeea5SJeff Kirsher INIT_WORK(&efx->reset_work, efx_reset_work); 2247874aeea5SJeff Kirsher INIT_DELAYED_WORK(&efx->monitor_work, efx_monitor); 2248874aeea5SJeff Kirsher efx->pci_dev = pci_dev; 2249874aeea5SJeff Kirsher efx->msg_enable = debug; 2250874aeea5SJeff Kirsher efx->state = STATE_INIT; 2251874aeea5SJeff Kirsher strlcpy(efx->name, pci_name(pci_dev), sizeof(efx->name)); 2252874aeea5SJeff Kirsher 2253874aeea5SJeff Kirsher efx->net_dev = net_dev; 2254874aeea5SJeff Kirsher spin_lock_init(&efx->stats_lock); 2255874aeea5SJeff Kirsher mutex_init(&efx->mac_lock); 2256874aeea5SJeff Kirsher efx->phy_op = &efx_dummy_phy_operations; 2257874aeea5SJeff Kirsher efx->mdio.dev = net_dev; 2258874aeea5SJeff Kirsher INIT_WORK(&efx->mac_work, efx_mac_work); 22599f2cb71cSBen Hutchings init_waitqueue_head(&efx->flush_wq); 2260874aeea5SJeff Kirsher 2261874aeea5SJeff Kirsher for (i = 0; i < EFX_MAX_CHANNELS; i++) { 2262874aeea5SJeff Kirsher efx->channel[i] = efx_alloc_channel(efx, i, NULL); 2263874aeea5SJeff Kirsher if (!efx->channel[i]) 2264874aeea5SJeff Kirsher goto fail; 2265874aeea5SJeff Kirsher } 2266874aeea5SJeff Kirsher 2267874aeea5SJeff Kirsher efx->type = type; 2268874aeea5SJeff Kirsher 2269874aeea5SJeff Kirsher EFX_BUG_ON_PARANOID(efx->type->phys_addr_channels > EFX_MAX_CHANNELS); 2270874aeea5SJeff Kirsher 2271874aeea5SJeff Kirsher /* Higher numbered interrupt modes are less capable! */ 2272874aeea5SJeff Kirsher efx->interrupt_mode = max(efx->type->max_interrupt_mode, 2273874aeea5SJeff Kirsher interrupt_mode); 2274874aeea5SJeff Kirsher 2275874aeea5SJeff Kirsher /* Would be good to use the net_dev name, but we're too early */ 2276874aeea5SJeff Kirsher snprintf(efx->workqueue_name, sizeof(efx->workqueue_name), "sfc%s", 2277874aeea5SJeff Kirsher pci_name(pci_dev)); 2278874aeea5SJeff Kirsher efx->workqueue = create_singlethread_workqueue(efx->workqueue_name); 2279874aeea5SJeff Kirsher if (!efx->workqueue) 2280874aeea5SJeff Kirsher goto fail; 2281874aeea5SJeff Kirsher 2282874aeea5SJeff Kirsher return 0; 2283874aeea5SJeff Kirsher 2284874aeea5SJeff Kirsher fail: 2285874aeea5SJeff Kirsher efx_fini_struct(efx); 2286874aeea5SJeff Kirsher return -ENOMEM; 2287874aeea5SJeff Kirsher } 2288874aeea5SJeff Kirsher 2289874aeea5SJeff Kirsher static void efx_fini_struct(struct efx_nic *efx) 2290874aeea5SJeff Kirsher { 2291874aeea5SJeff Kirsher int i; 2292874aeea5SJeff Kirsher 2293874aeea5SJeff Kirsher for (i = 0; i < EFX_MAX_CHANNELS; i++) 2294874aeea5SJeff Kirsher kfree(efx->channel[i]); 2295874aeea5SJeff Kirsher 2296874aeea5SJeff Kirsher if (efx->workqueue) { 2297874aeea5SJeff Kirsher destroy_workqueue(efx->workqueue); 2298874aeea5SJeff Kirsher efx->workqueue = NULL; 2299874aeea5SJeff Kirsher } 2300874aeea5SJeff Kirsher } 2301874aeea5SJeff Kirsher 2302874aeea5SJeff Kirsher /************************************************************************** 2303874aeea5SJeff Kirsher * 2304874aeea5SJeff Kirsher * PCI interface 2305874aeea5SJeff Kirsher * 2306874aeea5SJeff Kirsher **************************************************************************/ 2307874aeea5SJeff Kirsher 2308874aeea5SJeff Kirsher /* Main body of final NIC shutdown code 2309874aeea5SJeff Kirsher * This is called only at module unload (or hotplug removal). 2310874aeea5SJeff Kirsher */ 2311874aeea5SJeff Kirsher static void efx_pci_remove_main(struct efx_nic *efx) 2312874aeea5SJeff Kirsher { 2313874aeea5SJeff Kirsher #ifdef CONFIG_RFS_ACCEL 2314874aeea5SJeff Kirsher free_irq_cpu_rmap(efx->net_dev->rx_cpu_rmap); 2315874aeea5SJeff Kirsher efx->net_dev->rx_cpu_rmap = NULL; 2316874aeea5SJeff Kirsher #endif 23179f2cb71cSBen Hutchings efx_stop_interrupts(efx); 2318874aeea5SJeff Kirsher efx_nic_fini_interrupt(efx); 2319874aeea5SJeff Kirsher efx_fini_port(efx); 2320874aeea5SJeff Kirsher efx->type->fini(efx); 2321874aeea5SJeff Kirsher efx_fini_napi(efx); 2322874aeea5SJeff Kirsher efx_remove_all(efx); 2323874aeea5SJeff Kirsher } 2324874aeea5SJeff Kirsher 2325874aeea5SJeff Kirsher /* Final NIC shutdown 2326874aeea5SJeff Kirsher * This is called only at module unload (or hotplug removal). 2327874aeea5SJeff Kirsher */ 2328874aeea5SJeff Kirsher static void efx_pci_remove(struct pci_dev *pci_dev) 2329874aeea5SJeff Kirsher { 2330874aeea5SJeff Kirsher struct efx_nic *efx; 2331874aeea5SJeff Kirsher 2332874aeea5SJeff Kirsher efx = pci_get_drvdata(pci_dev); 2333874aeea5SJeff Kirsher if (!efx) 2334874aeea5SJeff Kirsher return; 2335874aeea5SJeff Kirsher 2336874aeea5SJeff Kirsher /* Mark the NIC as fini, then stop the interface */ 2337874aeea5SJeff Kirsher rtnl_lock(); 2338874aeea5SJeff Kirsher efx->state = STATE_FINI; 2339874aeea5SJeff Kirsher dev_close(efx->net_dev); 2340874aeea5SJeff Kirsher 2341874aeea5SJeff Kirsher /* Allow any queued efx_resets() to complete */ 2342874aeea5SJeff Kirsher rtnl_unlock(); 2343874aeea5SJeff Kirsher 23449f2cb71cSBen Hutchings efx_stop_interrupts(efx); 2345874aeea5SJeff Kirsher efx_unregister_netdev(efx); 2346874aeea5SJeff Kirsher 2347874aeea5SJeff Kirsher efx_mtd_remove(efx); 2348874aeea5SJeff Kirsher 2349874aeea5SJeff Kirsher /* Wait for any scheduled resets to complete. No more will be 2350874aeea5SJeff Kirsher * scheduled from this point because efx_stop_all() has been 2351874aeea5SJeff Kirsher * called, we are no longer registered with driverlink, and 2352874aeea5SJeff Kirsher * the net_device's have been removed. */ 2353874aeea5SJeff Kirsher cancel_work_sync(&efx->reset_work); 2354874aeea5SJeff Kirsher 2355874aeea5SJeff Kirsher efx_pci_remove_main(efx); 2356874aeea5SJeff Kirsher 2357874aeea5SJeff Kirsher efx_fini_io(efx); 2358874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "shutdown successful\n"); 2359874aeea5SJeff Kirsher 2360874aeea5SJeff Kirsher pci_set_drvdata(pci_dev, NULL); 2361874aeea5SJeff Kirsher efx_fini_struct(efx); 2362874aeea5SJeff Kirsher free_netdev(efx->net_dev); 2363874aeea5SJeff Kirsher }; 2364874aeea5SJeff Kirsher 2365874aeea5SJeff Kirsher /* Main body of NIC initialisation 2366874aeea5SJeff Kirsher * This is called at module load (or hotplug insertion, theoretically). 2367874aeea5SJeff Kirsher */ 2368874aeea5SJeff Kirsher static int efx_pci_probe_main(struct efx_nic *efx) 2369874aeea5SJeff Kirsher { 2370874aeea5SJeff Kirsher int rc; 2371874aeea5SJeff Kirsher 2372874aeea5SJeff Kirsher /* Do start-of-day initialisation */ 2373874aeea5SJeff Kirsher rc = efx_probe_all(efx); 2374874aeea5SJeff Kirsher if (rc) 2375874aeea5SJeff Kirsher goto fail1; 2376874aeea5SJeff Kirsher 2377874aeea5SJeff Kirsher efx_init_napi(efx); 2378874aeea5SJeff Kirsher 2379874aeea5SJeff Kirsher rc = efx->type->init(efx); 2380874aeea5SJeff Kirsher if (rc) { 2381874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 2382874aeea5SJeff Kirsher "failed to initialise NIC\n"); 2383874aeea5SJeff Kirsher goto fail3; 2384874aeea5SJeff Kirsher } 2385874aeea5SJeff Kirsher 2386874aeea5SJeff Kirsher rc = efx_init_port(efx); 2387874aeea5SJeff Kirsher if (rc) { 2388874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 2389874aeea5SJeff Kirsher "failed to initialise port\n"); 2390874aeea5SJeff Kirsher goto fail4; 2391874aeea5SJeff Kirsher } 2392874aeea5SJeff Kirsher 2393874aeea5SJeff Kirsher rc = efx_nic_init_interrupt(efx); 2394874aeea5SJeff Kirsher if (rc) 2395874aeea5SJeff Kirsher goto fail5; 23969f2cb71cSBen Hutchings efx_start_interrupts(efx); 2397874aeea5SJeff Kirsher 2398874aeea5SJeff Kirsher return 0; 2399874aeea5SJeff Kirsher 2400874aeea5SJeff Kirsher fail5: 2401874aeea5SJeff Kirsher efx_fini_port(efx); 2402874aeea5SJeff Kirsher fail4: 2403874aeea5SJeff Kirsher efx->type->fini(efx); 2404874aeea5SJeff Kirsher fail3: 2405874aeea5SJeff Kirsher efx_fini_napi(efx); 2406874aeea5SJeff Kirsher efx_remove_all(efx); 2407874aeea5SJeff Kirsher fail1: 2408874aeea5SJeff Kirsher return rc; 2409874aeea5SJeff Kirsher } 2410874aeea5SJeff Kirsher 2411874aeea5SJeff Kirsher /* NIC initialisation 2412874aeea5SJeff Kirsher * 2413874aeea5SJeff Kirsher * This is called at module load (or hotplug insertion, 241473ba7b68SBen Hutchings * theoretically). It sets up PCI mappings, resets the NIC, 2415874aeea5SJeff Kirsher * sets up and registers the network devices with the kernel and hooks 2416874aeea5SJeff Kirsher * the interrupt service routine. It does not prepare the device for 2417874aeea5SJeff Kirsher * transmission; this is left to the first time one of the network 2418874aeea5SJeff Kirsher * interfaces is brought up (i.e. efx_net_open). 2419874aeea5SJeff Kirsher */ 2420874aeea5SJeff Kirsher static int __devinit efx_pci_probe(struct pci_dev *pci_dev, 2421874aeea5SJeff Kirsher const struct pci_device_id *entry) 2422874aeea5SJeff Kirsher { 2423874aeea5SJeff Kirsher const struct efx_nic_type *type = (const struct efx_nic_type *) entry->driver_data; 2424874aeea5SJeff Kirsher struct net_device *net_dev; 2425874aeea5SJeff Kirsher struct efx_nic *efx; 2426fadac6aaSBen Hutchings int rc; 2427874aeea5SJeff Kirsher 2428874aeea5SJeff Kirsher /* Allocate and initialise a struct net_device and struct efx_nic */ 2429874aeea5SJeff Kirsher net_dev = alloc_etherdev_mqs(sizeof(*efx), EFX_MAX_CORE_TX_QUEUES, 2430874aeea5SJeff Kirsher EFX_MAX_RX_QUEUES); 2431874aeea5SJeff Kirsher if (!net_dev) 2432874aeea5SJeff Kirsher return -ENOMEM; 2433874aeea5SJeff Kirsher net_dev->features |= (type->offload_features | NETIF_F_SG | 2434874aeea5SJeff Kirsher NETIF_F_HIGHDMA | NETIF_F_TSO | 2435874aeea5SJeff Kirsher NETIF_F_RXCSUM); 2436874aeea5SJeff Kirsher if (type->offload_features & NETIF_F_V6_CSUM) 2437874aeea5SJeff Kirsher net_dev->features |= NETIF_F_TSO6; 2438874aeea5SJeff Kirsher /* Mask for features that also apply to VLAN devices */ 2439874aeea5SJeff Kirsher net_dev->vlan_features |= (NETIF_F_ALL_CSUM | NETIF_F_SG | 2440874aeea5SJeff Kirsher NETIF_F_HIGHDMA | NETIF_F_ALL_TSO | 2441874aeea5SJeff Kirsher NETIF_F_RXCSUM); 2442874aeea5SJeff Kirsher /* All offloads can be toggled */ 2443874aeea5SJeff Kirsher net_dev->hw_features = net_dev->features & ~NETIF_F_HIGHDMA; 2444874aeea5SJeff Kirsher efx = netdev_priv(net_dev); 2445874aeea5SJeff Kirsher pci_set_drvdata(pci_dev, efx); 2446874aeea5SJeff Kirsher SET_NETDEV_DEV(net_dev, &pci_dev->dev); 2447874aeea5SJeff Kirsher rc = efx_init_struct(efx, type, pci_dev, net_dev); 2448874aeea5SJeff Kirsher if (rc) 2449874aeea5SJeff Kirsher goto fail1; 2450874aeea5SJeff Kirsher 2451874aeea5SJeff Kirsher netif_info(efx, probe, efx->net_dev, 2452874aeea5SJeff Kirsher "Solarflare NIC detected\n"); 2453874aeea5SJeff Kirsher 2454874aeea5SJeff Kirsher /* Set up basic I/O (BAR mappings etc) */ 2455874aeea5SJeff Kirsher rc = efx_init_io(efx); 2456874aeea5SJeff Kirsher if (rc) 2457874aeea5SJeff Kirsher goto fail2; 2458874aeea5SJeff Kirsher 2459874aeea5SJeff Kirsher rc = efx_pci_probe_main(efx); 2460874aeea5SJeff Kirsher 2461874aeea5SJeff Kirsher /* Serialise against efx_reset(). No more resets will be 2462fadac6aaSBen Hutchings * scheduled since efx_stop_all() has been called, and we have 2463fadac6aaSBen Hutchings * not and never have been registered. 2464fadac6aaSBen Hutchings */ 2465874aeea5SJeff Kirsher cancel_work_sync(&efx->reset_work); 2466874aeea5SJeff Kirsher 2467fadac6aaSBen Hutchings if (rc) 2468874aeea5SJeff Kirsher goto fail3; 2469874aeea5SJeff Kirsher 2470fadac6aaSBen Hutchings /* If there was a scheduled reset during probe, the NIC is 2471fadac6aaSBen Hutchings * probably hosed anyway. 2472fadac6aaSBen Hutchings */ 2473fadac6aaSBen Hutchings if (efx->reset_pending) { 2474fadac6aaSBen Hutchings rc = -EIO; 2475874aeea5SJeff Kirsher goto fail4; 2476874aeea5SJeff Kirsher } 2477874aeea5SJeff Kirsher 2478874aeea5SJeff Kirsher /* Switch to the running state before we expose the device to the OS, 2479874aeea5SJeff Kirsher * so that dev_open()|efx_start_all() will actually start the device */ 2480874aeea5SJeff Kirsher efx->state = STATE_RUNNING; 2481874aeea5SJeff Kirsher 2482874aeea5SJeff Kirsher rc = efx_register_netdev(efx); 2483874aeea5SJeff Kirsher if (rc) 2484fadac6aaSBen Hutchings goto fail4; 2485874aeea5SJeff Kirsher 2486874aeea5SJeff Kirsher netif_dbg(efx, probe, efx->net_dev, "initialisation successful\n"); 2487874aeea5SJeff Kirsher 24887c43161cSBen Hutchings /* Try to create MTDs, but allow this to fail */ 2489874aeea5SJeff Kirsher rtnl_lock(); 24907c43161cSBen Hutchings rc = efx_mtd_probe(efx); 2491874aeea5SJeff Kirsher rtnl_unlock(); 24927c43161cSBen Hutchings if (rc) 24937c43161cSBen Hutchings netif_warn(efx, probe, efx->net_dev, 24947c43161cSBen Hutchings "failed to create MTDs (%d)\n", rc); 24957c43161cSBen Hutchings 2496874aeea5SJeff Kirsher return 0; 2497874aeea5SJeff Kirsher 2498874aeea5SJeff Kirsher fail4: 2499fadac6aaSBen Hutchings efx_pci_remove_main(efx); 2500874aeea5SJeff Kirsher fail3: 2501874aeea5SJeff Kirsher efx_fini_io(efx); 2502874aeea5SJeff Kirsher fail2: 2503874aeea5SJeff Kirsher efx_fini_struct(efx); 2504874aeea5SJeff Kirsher fail1: 2505874aeea5SJeff Kirsher WARN_ON(rc > 0); 2506874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "initialisation failed. rc=%d\n", rc); 2507874aeea5SJeff Kirsher free_netdev(net_dev); 2508874aeea5SJeff Kirsher return rc; 2509874aeea5SJeff Kirsher } 2510874aeea5SJeff Kirsher 2511874aeea5SJeff Kirsher static int efx_pm_freeze(struct device *dev) 2512874aeea5SJeff Kirsher { 2513874aeea5SJeff Kirsher struct efx_nic *efx = pci_get_drvdata(to_pci_dev(dev)); 2514874aeea5SJeff Kirsher 2515874aeea5SJeff Kirsher efx->state = STATE_FINI; 2516874aeea5SJeff Kirsher 2517874aeea5SJeff Kirsher netif_device_detach(efx->net_dev); 2518874aeea5SJeff Kirsher 2519874aeea5SJeff Kirsher efx_stop_all(efx); 25209f2cb71cSBen Hutchings efx_stop_interrupts(efx); 2521874aeea5SJeff Kirsher 2522874aeea5SJeff Kirsher return 0; 2523874aeea5SJeff Kirsher } 2524874aeea5SJeff Kirsher 2525874aeea5SJeff Kirsher static int efx_pm_thaw(struct device *dev) 2526874aeea5SJeff Kirsher { 2527874aeea5SJeff Kirsher struct efx_nic *efx = pci_get_drvdata(to_pci_dev(dev)); 2528874aeea5SJeff Kirsher 2529874aeea5SJeff Kirsher efx->state = STATE_INIT; 2530874aeea5SJeff Kirsher 25319f2cb71cSBen Hutchings efx_start_interrupts(efx); 2532874aeea5SJeff Kirsher 2533874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 2534874aeea5SJeff Kirsher efx->phy_op->reconfigure(efx); 2535874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 2536874aeea5SJeff Kirsher 2537874aeea5SJeff Kirsher efx_start_all(efx); 2538874aeea5SJeff Kirsher 2539874aeea5SJeff Kirsher netif_device_attach(efx->net_dev); 2540874aeea5SJeff Kirsher 2541874aeea5SJeff Kirsher efx->state = STATE_RUNNING; 2542874aeea5SJeff Kirsher 2543874aeea5SJeff Kirsher efx->type->resume_wol(efx); 2544874aeea5SJeff Kirsher 2545874aeea5SJeff Kirsher /* Reschedule any quenched resets scheduled during efx_pm_freeze() */ 2546874aeea5SJeff Kirsher queue_work(reset_workqueue, &efx->reset_work); 2547874aeea5SJeff Kirsher 2548874aeea5SJeff Kirsher return 0; 2549874aeea5SJeff Kirsher } 2550874aeea5SJeff Kirsher 2551874aeea5SJeff Kirsher static int efx_pm_poweroff(struct device *dev) 2552874aeea5SJeff Kirsher { 2553874aeea5SJeff Kirsher struct pci_dev *pci_dev = to_pci_dev(dev); 2554874aeea5SJeff Kirsher struct efx_nic *efx = pci_get_drvdata(pci_dev); 2555874aeea5SJeff Kirsher 2556874aeea5SJeff Kirsher efx->type->fini(efx); 2557874aeea5SJeff Kirsher 2558874aeea5SJeff Kirsher efx->reset_pending = 0; 2559874aeea5SJeff Kirsher 2560874aeea5SJeff Kirsher pci_save_state(pci_dev); 2561874aeea5SJeff Kirsher return pci_set_power_state(pci_dev, PCI_D3hot); 2562874aeea5SJeff Kirsher } 2563874aeea5SJeff Kirsher 2564874aeea5SJeff Kirsher /* Used for both resume and restore */ 2565874aeea5SJeff Kirsher static int efx_pm_resume(struct device *dev) 2566874aeea5SJeff Kirsher { 2567874aeea5SJeff Kirsher struct pci_dev *pci_dev = to_pci_dev(dev); 2568874aeea5SJeff Kirsher struct efx_nic *efx = pci_get_drvdata(pci_dev); 2569874aeea5SJeff Kirsher int rc; 2570874aeea5SJeff Kirsher 2571874aeea5SJeff Kirsher rc = pci_set_power_state(pci_dev, PCI_D0); 2572874aeea5SJeff Kirsher if (rc) 2573874aeea5SJeff Kirsher return rc; 2574874aeea5SJeff Kirsher pci_restore_state(pci_dev); 2575874aeea5SJeff Kirsher rc = pci_enable_device(pci_dev); 2576874aeea5SJeff Kirsher if (rc) 2577874aeea5SJeff Kirsher return rc; 2578874aeea5SJeff Kirsher pci_set_master(efx->pci_dev); 2579874aeea5SJeff Kirsher rc = efx->type->reset(efx, RESET_TYPE_ALL); 2580874aeea5SJeff Kirsher if (rc) 2581874aeea5SJeff Kirsher return rc; 2582874aeea5SJeff Kirsher rc = efx->type->init(efx); 2583874aeea5SJeff Kirsher if (rc) 2584874aeea5SJeff Kirsher return rc; 2585874aeea5SJeff Kirsher efx_pm_thaw(dev); 2586874aeea5SJeff Kirsher return 0; 2587874aeea5SJeff Kirsher } 2588874aeea5SJeff Kirsher 2589874aeea5SJeff Kirsher static int efx_pm_suspend(struct device *dev) 2590874aeea5SJeff Kirsher { 2591874aeea5SJeff Kirsher int rc; 2592874aeea5SJeff Kirsher 2593874aeea5SJeff Kirsher efx_pm_freeze(dev); 2594874aeea5SJeff Kirsher rc = efx_pm_poweroff(dev); 2595874aeea5SJeff Kirsher if (rc) 2596874aeea5SJeff Kirsher efx_pm_resume(dev); 2597874aeea5SJeff Kirsher return rc; 2598874aeea5SJeff Kirsher } 2599874aeea5SJeff Kirsher 260018e83e4cSBen Hutchings static const struct dev_pm_ops efx_pm_ops = { 2601874aeea5SJeff Kirsher .suspend = efx_pm_suspend, 2602874aeea5SJeff Kirsher .resume = efx_pm_resume, 2603874aeea5SJeff Kirsher .freeze = efx_pm_freeze, 2604874aeea5SJeff Kirsher .thaw = efx_pm_thaw, 2605874aeea5SJeff Kirsher .poweroff = efx_pm_poweroff, 2606874aeea5SJeff Kirsher .restore = efx_pm_resume, 2607874aeea5SJeff Kirsher }; 2608874aeea5SJeff Kirsher 2609874aeea5SJeff Kirsher static struct pci_driver efx_pci_driver = { 2610874aeea5SJeff Kirsher .name = KBUILD_MODNAME, 2611874aeea5SJeff Kirsher .id_table = efx_pci_table, 2612874aeea5SJeff Kirsher .probe = efx_pci_probe, 2613874aeea5SJeff Kirsher .remove = efx_pci_remove, 2614874aeea5SJeff Kirsher .driver.pm = &efx_pm_ops, 2615874aeea5SJeff Kirsher }; 2616874aeea5SJeff Kirsher 2617874aeea5SJeff Kirsher /************************************************************************** 2618874aeea5SJeff Kirsher * 2619874aeea5SJeff Kirsher * Kernel module interface 2620874aeea5SJeff Kirsher * 2621874aeea5SJeff Kirsher *************************************************************************/ 2622874aeea5SJeff Kirsher 2623874aeea5SJeff Kirsher module_param(interrupt_mode, uint, 0444); 2624874aeea5SJeff Kirsher MODULE_PARM_DESC(interrupt_mode, 2625874aeea5SJeff Kirsher "Interrupt mode (0=>MSIX 1=>MSI 2=>legacy)"); 2626874aeea5SJeff Kirsher 2627874aeea5SJeff Kirsher static int __init efx_init_module(void) 2628874aeea5SJeff Kirsher { 2629874aeea5SJeff Kirsher int rc; 2630874aeea5SJeff Kirsher 2631874aeea5SJeff Kirsher printk(KERN_INFO "Solarflare NET driver v" EFX_DRIVER_VERSION "\n"); 2632874aeea5SJeff Kirsher 2633874aeea5SJeff Kirsher rc = register_netdevice_notifier(&efx_netdev_notifier); 2634874aeea5SJeff Kirsher if (rc) 2635874aeea5SJeff Kirsher goto err_notifier; 2636874aeea5SJeff Kirsher 2637874aeea5SJeff Kirsher reset_workqueue = create_singlethread_workqueue("sfc_reset"); 2638874aeea5SJeff Kirsher if (!reset_workqueue) { 2639874aeea5SJeff Kirsher rc = -ENOMEM; 2640874aeea5SJeff Kirsher goto err_reset; 2641874aeea5SJeff Kirsher } 2642874aeea5SJeff Kirsher 2643874aeea5SJeff Kirsher rc = pci_register_driver(&efx_pci_driver); 2644874aeea5SJeff Kirsher if (rc < 0) 2645874aeea5SJeff Kirsher goto err_pci; 2646874aeea5SJeff Kirsher 2647874aeea5SJeff Kirsher return 0; 2648874aeea5SJeff Kirsher 2649874aeea5SJeff Kirsher err_pci: 2650874aeea5SJeff Kirsher destroy_workqueue(reset_workqueue); 2651874aeea5SJeff Kirsher err_reset: 2652874aeea5SJeff Kirsher unregister_netdevice_notifier(&efx_netdev_notifier); 2653874aeea5SJeff Kirsher err_notifier: 2654874aeea5SJeff Kirsher return rc; 2655874aeea5SJeff Kirsher } 2656874aeea5SJeff Kirsher 2657874aeea5SJeff Kirsher static void __exit efx_exit_module(void) 2658874aeea5SJeff Kirsher { 2659874aeea5SJeff Kirsher printk(KERN_INFO "Solarflare NET driver unloading\n"); 2660874aeea5SJeff Kirsher 2661874aeea5SJeff Kirsher pci_unregister_driver(&efx_pci_driver); 2662874aeea5SJeff Kirsher destroy_workqueue(reset_workqueue); 2663874aeea5SJeff Kirsher unregister_netdevice_notifier(&efx_netdev_notifier); 2664874aeea5SJeff Kirsher 2665874aeea5SJeff Kirsher } 2666874aeea5SJeff Kirsher 2667874aeea5SJeff Kirsher module_init(efx_init_module); 2668874aeea5SJeff Kirsher module_exit(efx_exit_module); 2669874aeea5SJeff Kirsher 2670874aeea5SJeff Kirsher MODULE_AUTHOR("Solarflare Communications and " 2671874aeea5SJeff Kirsher "Michael Brown <mbrown@fensystems.co.uk>"); 2672874aeea5SJeff Kirsher MODULE_DESCRIPTION("Solarflare Communications network driver"); 2673874aeea5SJeff Kirsher MODULE_LICENSE("GPL"); 2674874aeea5SJeff Kirsher MODULE_DEVICE_TABLE(pci, efx_pci_table); 2675