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 1897f967c01SBen Hutchings static void efx_start_interrupts(struct efx_nic *efx, bool may_keep_eventq); 1907f967c01SBen Hutchings static void efx_stop_interrupts(struct efx_nic *efx, bool may_keep_eventq); 1917f967c01SBen Hutchings static void efx_remove_channel(struct efx_channel *channel); 192874aeea5SJeff Kirsher static void efx_remove_channels(struct efx_nic *efx); 1937f967c01SBen Hutchings static const struct efx_channel_type efx_default_channel_type; 194874aeea5SJeff Kirsher static void efx_remove_port(struct efx_nic *efx); 1957f967c01SBen Hutchings static void efx_init_napi_channel(struct efx_channel *channel); 196874aeea5SJeff Kirsher static void efx_fini_napi(struct efx_nic *efx); 197874aeea5SJeff Kirsher static void efx_fini_napi_channel(struct efx_channel *channel); 198874aeea5SJeff Kirsher static void efx_fini_struct(struct efx_nic *efx); 199874aeea5SJeff Kirsher static void efx_start_all(struct efx_nic *efx); 200874aeea5SJeff Kirsher static void efx_stop_all(struct efx_nic *efx); 201874aeea5SJeff Kirsher 202874aeea5SJeff Kirsher #define EFX_ASSERT_RESET_SERIALISED(efx) \ 203874aeea5SJeff Kirsher do { \ 204874aeea5SJeff Kirsher if ((efx->state == STATE_RUNNING) || \ 205874aeea5SJeff Kirsher (efx->state == STATE_DISABLED)) \ 206874aeea5SJeff Kirsher ASSERT_RTNL(); \ 207874aeea5SJeff Kirsher } while (0) 208874aeea5SJeff Kirsher 209874aeea5SJeff Kirsher /************************************************************************** 210874aeea5SJeff Kirsher * 211874aeea5SJeff Kirsher * Event queue processing 212874aeea5SJeff Kirsher * 213874aeea5SJeff Kirsher *************************************************************************/ 214874aeea5SJeff Kirsher 215874aeea5SJeff Kirsher /* Process channel's event queue 216874aeea5SJeff Kirsher * 217874aeea5SJeff Kirsher * This function is responsible for processing the event queue of a 218874aeea5SJeff Kirsher * single channel. The caller must guarantee that this function will 219874aeea5SJeff Kirsher * never be concurrently called more than once on the same channel, 220874aeea5SJeff Kirsher * though different channels may be being processed concurrently. 221874aeea5SJeff Kirsher */ 222874aeea5SJeff Kirsher static int efx_process_channel(struct efx_channel *channel, int budget) 223874aeea5SJeff Kirsher { 224874aeea5SJeff Kirsher int spent; 225874aeea5SJeff Kirsher 2269f2cb71cSBen Hutchings if (unlikely(!channel->enabled)) 227874aeea5SJeff Kirsher return 0; 228874aeea5SJeff Kirsher 229874aeea5SJeff Kirsher spent = efx_nic_process_eventq(channel, budget); 230d9ab7007SBen Hutchings if (spent && efx_channel_has_rx_queue(channel)) { 231d9ab7007SBen Hutchings struct efx_rx_queue *rx_queue = 232d9ab7007SBen Hutchings efx_channel_get_rx_queue(channel); 233874aeea5SJeff Kirsher 234874aeea5SJeff Kirsher /* Deliver last RX packet. */ 235874aeea5SJeff Kirsher if (channel->rx_pkt) { 236db339569SBen Hutchings __efx_rx_packet(channel, channel->rx_pkt); 237874aeea5SJeff Kirsher channel->rx_pkt = NULL; 238874aeea5SJeff Kirsher } 2399f2cb71cSBen Hutchings if (rx_queue->enabled) { 240874aeea5SJeff Kirsher efx_rx_strategy(channel); 241d9ab7007SBen Hutchings efx_fast_push_rx_descriptors(rx_queue); 242d9ab7007SBen Hutchings } 2439f2cb71cSBen Hutchings } 244874aeea5SJeff Kirsher 245874aeea5SJeff Kirsher return spent; 246874aeea5SJeff Kirsher } 247874aeea5SJeff Kirsher 248874aeea5SJeff Kirsher /* Mark channel as finished processing 249874aeea5SJeff Kirsher * 250874aeea5SJeff Kirsher * Note that since we will not receive further interrupts for this 251874aeea5SJeff Kirsher * channel before we finish processing and call the eventq_read_ack() 252874aeea5SJeff Kirsher * method, there is no need to use the interrupt hold-off timers. 253874aeea5SJeff Kirsher */ 254874aeea5SJeff Kirsher static inline void efx_channel_processed(struct efx_channel *channel) 255874aeea5SJeff Kirsher { 256874aeea5SJeff Kirsher /* The interrupt handler for this channel may set work_pending 257874aeea5SJeff Kirsher * as soon as we acknowledge the events we've seen. Make sure 258874aeea5SJeff Kirsher * it's cleared before then. */ 259874aeea5SJeff Kirsher channel->work_pending = false; 260874aeea5SJeff Kirsher smp_wmb(); 261874aeea5SJeff Kirsher 262874aeea5SJeff Kirsher efx_nic_eventq_read_ack(channel); 263874aeea5SJeff Kirsher } 264874aeea5SJeff Kirsher 265874aeea5SJeff Kirsher /* NAPI poll handler 266874aeea5SJeff Kirsher * 267874aeea5SJeff Kirsher * NAPI guarantees serialisation of polls of the same device, which 268874aeea5SJeff Kirsher * provides the guarantee required by efx_process_channel(). 269874aeea5SJeff Kirsher */ 270874aeea5SJeff Kirsher static int efx_poll(struct napi_struct *napi, int budget) 271874aeea5SJeff Kirsher { 272874aeea5SJeff Kirsher struct efx_channel *channel = 273874aeea5SJeff Kirsher container_of(napi, struct efx_channel, napi_str); 274874aeea5SJeff Kirsher struct efx_nic *efx = channel->efx; 275874aeea5SJeff Kirsher int spent; 276874aeea5SJeff Kirsher 277874aeea5SJeff Kirsher netif_vdbg(efx, intr, efx->net_dev, 278874aeea5SJeff Kirsher "channel %d NAPI poll executing on CPU %d\n", 279874aeea5SJeff Kirsher channel->channel, raw_smp_processor_id()); 280874aeea5SJeff Kirsher 281874aeea5SJeff Kirsher spent = efx_process_channel(channel, budget); 282874aeea5SJeff Kirsher 283874aeea5SJeff Kirsher if (spent < budget) { 2849d9a6973SBen Hutchings if (efx_channel_has_rx_queue(channel) && 285874aeea5SJeff Kirsher efx->irq_rx_adaptive && 286874aeea5SJeff Kirsher unlikely(++channel->irq_count == 1000)) { 287874aeea5SJeff Kirsher if (unlikely(channel->irq_mod_score < 288874aeea5SJeff Kirsher irq_adapt_low_thresh)) { 289874aeea5SJeff Kirsher if (channel->irq_moderation > 1) { 290874aeea5SJeff Kirsher channel->irq_moderation -= 1; 291874aeea5SJeff Kirsher efx->type->push_irq_moderation(channel); 292874aeea5SJeff Kirsher } 293874aeea5SJeff Kirsher } else if (unlikely(channel->irq_mod_score > 294874aeea5SJeff Kirsher irq_adapt_high_thresh)) { 295874aeea5SJeff Kirsher if (channel->irq_moderation < 296874aeea5SJeff Kirsher efx->irq_rx_moderation) { 297874aeea5SJeff Kirsher channel->irq_moderation += 1; 298874aeea5SJeff Kirsher efx->type->push_irq_moderation(channel); 299874aeea5SJeff Kirsher } 300874aeea5SJeff Kirsher } 301874aeea5SJeff Kirsher channel->irq_count = 0; 302874aeea5SJeff Kirsher channel->irq_mod_score = 0; 303874aeea5SJeff Kirsher } 304874aeea5SJeff Kirsher 305874aeea5SJeff Kirsher efx_filter_rfs_expire(channel); 306874aeea5SJeff Kirsher 307874aeea5SJeff Kirsher /* There is no race here; although napi_disable() will 308874aeea5SJeff Kirsher * only wait for napi_complete(), this isn't a problem 309874aeea5SJeff Kirsher * since efx_channel_processed() will have no effect if 310874aeea5SJeff Kirsher * interrupts have already been disabled. 311874aeea5SJeff Kirsher */ 312874aeea5SJeff Kirsher napi_complete(napi); 313874aeea5SJeff Kirsher efx_channel_processed(channel); 314874aeea5SJeff Kirsher } 315874aeea5SJeff Kirsher 316874aeea5SJeff Kirsher return spent; 317874aeea5SJeff Kirsher } 318874aeea5SJeff Kirsher 319874aeea5SJeff Kirsher /* Process the eventq of the specified channel immediately on this CPU 320874aeea5SJeff Kirsher * 321874aeea5SJeff Kirsher * Disable hardware generated interrupts, wait for any existing 322874aeea5SJeff Kirsher * processing to finish, then directly poll (and ack ) the eventq. 323874aeea5SJeff Kirsher * Finally reenable NAPI and interrupts. 324874aeea5SJeff Kirsher * 325874aeea5SJeff Kirsher * This is for use only during a loopback self-test. It must not 326874aeea5SJeff Kirsher * deliver any packets up the stack as this can result in deadlock. 327874aeea5SJeff Kirsher */ 328874aeea5SJeff Kirsher void efx_process_channel_now(struct efx_channel *channel) 329874aeea5SJeff Kirsher { 330874aeea5SJeff Kirsher struct efx_nic *efx = channel->efx; 331874aeea5SJeff Kirsher 332874aeea5SJeff Kirsher BUG_ON(channel->channel >= efx->n_channels); 333874aeea5SJeff Kirsher BUG_ON(!channel->enabled); 334874aeea5SJeff Kirsher BUG_ON(!efx->loopback_selftest); 335874aeea5SJeff Kirsher 336874aeea5SJeff Kirsher /* Disable interrupts and wait for ISRs to complete */ 337874aeea5SJeff Kirsher efx_nic_disable_interrupts(efx); 338874aeea5SJeff Kirsher if (efx->legacy_irq) { 339874aeea5SJeff Kirsher synchronize_irq(efx->legacy_irq); 340874aeea5SJeff Kirsher efx->legacy_irq_enabled = false; 341874aeea5SJeff Kirsher } 342874aeea5SJeff Kirsher if (channel->irq) 343874aeea5SJeff Kirsher synchronize_irq(channel->irq); 344874aeea5SJeff Kirsher 345874aeea5SJeff Kirsher /* Wait for any NAPI processing to complete */ 346874aeea5SJeff Kirsher napi_disable(&channel->napi_str); 347874aeea5SJeff Kirsher 348874aeea5SJeff Kirsher /* Poll the channel */ 349874aeea5SJeff Kirsher efx_process_channel(channel, channel->eventq_mask + 1); 350874aeea5SJeff Kirsher 351874aeea5SJeff Kirsher /* Ack the eventq. This may cause an interrupt to be generated 352874aeea5SJeff Kirsher * when they are reenabled */ 353874aeea5SJeff Kirsher efx_channel_processed(channel); 354874aeea5SJeff Kirsher 355874aeea5SJeff Kirsher napi_enable(&channel->napi_str); 356874aeea5SJeff Kirsher if (efx->legacy_irq) 357874aeea5SJeff Kirsher efx->legacy_irq_enabled = true; 358874aeea5SJeff Kirsher efx_nic_enable_interrupts(efx); 359874aeea5SJeff Kirsher } 360874aeea5SJeff Kirsher 361874aeea5SJeff Kirsher /* Create event queue 362874aeea5SJeff Kirsher * Event queue memory allocations are done only once. If the channel 363874aeea5SJeff Kirsher * is reset, the memory buffer will be reused; this guards against 364874aeea5SJeff Kirsher * errors during channel reset and also simplifies interrupt handling. 365874aeea5SJeff Kirsher */ 366874aeea5SJeff Kirsher static int efx_probe_eventq(struct efx_channel *channel) 367874aeea5SJeff Kirsher { 368874aeea5SJeff Kirsher struct efx_nic *efx = channel->efx; 369874aeea5SJeff Kirsher unsigned long entries; 370874aeea5SJeff Kirsher 37186ee5302SBen Hutchings netif_dbg(efx, probe, efx->net_dev, 372874aeea5SJeff Kirsher "chan %d create event queue\n", channel->channel); 373874aeea5SJeff Kirsher 374874aeea5SJeff Kirsher /* Build an event queue with room for one event per tx and rx buffer, 375874aeea5SJeff Kirsher * plus some extra for link state events and MCDI completions. */ 376874aeea5SJeff Kirsher entries = roundup_pow_of_two(efx->rxq_entries + efx->txq_entries + 128); 377874aeea5SJeff Kirsher EFX_BUG_ON_PARANOID(entries > EFX_MAX_EVQ_SIZE); 378874aeea5SJeff Kirsher channel->eventq_mask = max(entries, EFX_MIN_EVQ_SIZE) - 1; 379874aeea5SJeff Kirsher 380874aeea5SJeff Kirsher return efx_nic_probe_eventq(channel); 381874aeea5SJeff Kirsher } 382874aeea5SJeff Kirsher 383874aeea5SJeff Kirsher /* Prepare channel's event queue */ 384874aeea5SJeff Kirsher static void efx_init_eventq(struct efx_channel *channel) 385874aeea5SJeff Kirsher { 386874aeea5SJeff Kirsher netif_dbg(channel->efx, drv, channel->efx->net_dev, 387874aeea5SJeff Kirsher "chan %d init event queue\n", channel->channel); 388874aeea5SJeff Kirsher 389874aeea5SJeff Kirsher channel->eventq_read_ptr = 0; 390874aeea5SJeff Kirsher 391874aeea5SJeff Kirsher efx_nic_init_eventq(channel); 392874aeea5SJeff Kirsher } 393874aeea5SJeff Kirsher 3949f2cb71cSBen Hutchings /* Enable event queue processing and NAPI */ 3959f2cb71cSBen Hutchings static void efx_start_eventq(struct efx_channel *channel) 3969f2cb71cSBen Hutchings { 3979f2cb71cSBen Hutchings netif_dbg(channel->efx, ifup, channel->efx->net_dev, 3989f2cb71cSBen Hutchings "chan %d start event queue\n", channel->channel); 3999f2cb71cSBen Hutchings 4009f2cb71cSBen Hutchings /* The interrupt handler for this channel may set work_pending 4019f2cb71cSBen Hutchings * as soon as we enable it. Make sure it's cleared before 4029f2cb71cSBen Hutchings * then. Similarly, make sure it sees the enabled flag set. 4039f2cb71cSBen Hutchings */ 4049f2cb71cSBen Hutchings channel->work_pending = false; 4059f2cb71cSBen Hutchings channel->enabled = true; 4069f2cb71cSBen Hutchings smp_wmb(); 4079f2cb71cSBen Hutchings 4089f2cb71cSBen Hutchings napi_enable(&channel->napi_str); 4099f2cb71cSBen Hutchings efx_nic_eventq_read_ack(channel); 4109f2cb71cSBen Hutchings } 4119f2cb71cSBen Hutchings 4129f2cb71cSBen Hutchings /* Disable event queue processing and NAPI */ 4139f2cb71cSBen Hutchings static void efx_stop_eventq(struct efx_channel *channel) 4149f2cb71cSBen Hutchings { 4159f2cb71cSBen Hutchings if (!channel->enabled) 4169f2cb71cSBen Hutchings return; 4179f2cb71cSBen Hutchings 4189f2cb71cSBen Hutchings napi_disable(&channel->napi_str); 4199f2cb71cSBen Hutchings channel->enabled = false; 4209f2cb71cSBen Hutchings } 4219f2cb71cSBen Hutchings 422874aeea5SJeff Kirsher static void efx_fini_eventq(struct efx_channel *channel) 423874aeea5SJeff Kirsher { 424874aeea5SJeff Kirsher netif_dbg(channel->efx, drv, channel->efx->net_dev, 425874aeea5SJeff Kirsher "chan %d fini event queue\n", channel->channel); 426874aeea5SJeff Kirsher 427874aeea5SJeff Kirsher efx_nic_fini_eventq(channel); 428874aeea5SJeff Kirsher } 429874aeea5SJeff Kirsher 430874aeea5SJeff Kirsher static void efx_remove_eventq(struct efx_channel *channel) 431874aeea5SJeff Kirsher { 432874aeea5SJeff Kirsher netif_dbg(channel->efx, drv, channel->efx->net_dev, 433874aeea5SJeff Kirsher "chan %d remove event queue\n", channel->channel); 434874aeea5SJeff Kirsher 435874aeea5SJeff Kirsher efx_nic_remove_eventq(channel); 436874aeea5SJeff Kirsher } 437874aeea5SJeff Kirsher 438874aeea5SJeff Kirsher /************************************************************************** 439874aeea5SJeff Kirsher * 440874aeea5SJeff Kirsher * Channel handling 441874aeea5SJeff Kirsher * 442874aeea5SJeff Kirsher *************************************************************************/ 443874aeea5SJeff Kirsher 4447f967c01SBen Hutchings /* Allocate and initialise a channel structure. */ 445874aeea5SJeff Kirsher static struct efx_channel * 446874aeea5SJeff Kirsher efx_alloc_channel(struct efx_nic *efx, int i, struct efx_channel *old_channel) 447874aeea5SJeff Kirsher { 448874aeea5SJeff Kirsher struct efx_channel *channel; 449874aeea5SJeff Kirsher struct efx_rx_queue *rx_queue; 450874aeea5SJeff Kirsher struct efx_tx_queue *tx_queue; 451874aeea5SJeff Kirsher int j; 452874aeea5SJeff Kirsher 4537f967c01SBen Hutchings channel = kzalloc(sizeof(*channel), GFP_KERNEL); 4547f967c01SBen Hutchings if (!channel) 4557f967c01SBen Hutchings return NULL; 4567f967c01SBen Hutchings 4577f967c01SBen Hutchings channel->efx = efx; 4587f967c01SBen Hutchings channel->channel = i; 4597f967c01SBen Hutchings channel->type = &efx_default_channel_type; 4607f967c01SBen Hutchings 4617f967c01SBen Hutchings for (j = 0; j < EFX_TXQ_TYPES; j++) { 4627f967c01SBen Hutchings tx_queue = &channel->tx_queue[j]; 4637f967c01SBen Hutchings tx_queue->efx = efx; 4647f967c01SBen Hutchings tx_queue->queue = i * EFX_TXQ_TYPES + j; 4657f967c01SBen Hutchings tx_queue->channel = channel; 4667f967c01SBen Hutchings } 4677f967c01SBen Hutchings 4687f967c01SBen Hutchings rx_queue = &channel->rx_queue; 4697f967c01SBen Hutchings rx_queue->efx = efx; 4707f967c01SBen Hutchings setup_timer(&rx_queue->slow_fill, efx_rx_slow_fill, 4717f967c01SBen Hutchings (unsigned long)rx_queue); 4727f967c01SBen Hutchings 4737f967c01SBen Hutchings return channel; 4747f967c01SBen Hutchings } 4757f967c01SBen Hutchings 4767f967c01SBen Hutchings /* Allocate and initialise a channel structure, copying parameters 4777f967c01SBen Hutchings * (but not resources) from an old channel structure. 4787f967c01SBen Hutchings */ 4797f967c01SBen Hutchings static struct efx_channel * 4807f967c01SBen Hutchings efx_copy_channel(const struct efx_channel *old_channel) 4817f967c01SBen Hutchings { 4827f967c01SBen Hutchings struct efx_channel *channel; 4837f967c01SBen Hutchings struct efx_rx_queue *rx_queue; 4847f967c01SBen Hutchings struct efx_tx_queue *tx_queue; 4857f967c01SBen Hutchings int j; 4867f967c01SBen Hutchings 487874aeea5SJeff Kirsher channel = kmalloc(sizeof(*channel), GFP_KERNEL); 488874aeea5SJeff Kirsher if (!channel) 489874aeea5SJeff Kirsher return NULL; 490874aeea5SJeff Kirsher 491874aeea5SJeff Kirsher *channel = *old_channel; 492874aeea5SJeff Kirsher 493874aeea5SJeff Kirsher channel->napi_dev = NULL; 494874aeea5SJeff Kirsher memset(&channel->eventq, 0, sizeof(channel->eventq)); 495874aeea5SJeff Kirsher 496874aeea5SJeff Kirsher for (j = 0; j < EFX_TXQ_TYPES; j++) { 497874aeea5SJeff Kirsher tx_queue = &channel->tx_queue[j]; 498874aeea5SJeff Kirsher if (tx_queue->channel) 499874aeea5SJeff Kirsher tx_queue->channel = channel; 500874aeea5SJeff Kirsher tx_queue->buffer = NULL; 501874aeea5SJeff Kirsher memset(&tx_queue->txd, 0, sizeof(tx_queue->txd)); 502874aeea5SJeff Kirsher } 503874aeea5SJeff Kirsher 504874aeea5SJeff Kirsher rx_queue = &channel->rx_queue; 5057f967c01SBen Hutchings rx_queue->buffer = NULL; 5067f967c01SBen Hutchings memset(&rx_queue->rxd, 0, sizeof(rx_queue->rxd)); 507874aeea5SJeff Kirsher setup_timer(&rx_queue->slow_fill, efx_rx_slow_fill, 508874aeea5SJeff Kirsher (unsigned long)rx_queue); 509874aeea5SJeff Kirsher 510874aeea5SJeff Kirsher return channel; 511874aeea5SJeff Kirsher } 512874aeea5SJeff Kirsher 513874aeea5SJeff Kirsher static int efx_probe_channel(struct efx_channel *channel) 514874aeea5SJeff Kirsher { 515874aeea5SJeff Kirsher struct efx_tx_queue *tx_queue; 516874aeea5SJeff Kirsher struct efx_rx_queue *rx_queue; 517874aeea5SJeff Kirsher int rc; 518874aeea5SJeff Kirsher 519874aeea5SJeff Kirsher netif_dbg(channel->efx, probe, channel->efx->net_dev, 520874aeea5SJeff Kirsher "creating channel %d\n", channel->channel); 521874aeea5SJeff Kirsher 5227f967c01SBen Hutchings rc = channel->type->pre_probe(channel); 5237f967c01SBen Hutchings if (rc) 5247f967c01SBen Hutchings goto fail; 5257f967c01SBen Hutchings 526874aeea5SJeff Kirsher rc = efx_probe_eventq(channel); 527874aeea5SJeff Kirsher if (rc) 5287f967c01SBen Hutchings goto fail; 529874aeea5SJeff Kirsher 530874aeea5SJeff Kirsher efx_for_each_channel_tx_queue(tx_queue, channel) { 531874aeea5SJeff Kirsher rc = efx_probe_tx_queue(tx_queue); 532874aeea5SJeff Kirsher if (rc) 5337f967c01SBen Hutchings goto fail; 534874aeea5SJeff Kirsher } 535874aeea5SJeff Kirsher 536874aeea5SJeff Kirsher efx_for_each_channel_rx_queue(rx_queue, channel) { 537874aeea5SJeff Kirsher rc = efx_probe_rx_queue(rx_queue); 538874aeea5SJeff Kirsher if (rc) 5397f967c01SBen Hutchings goto fail; 540874aeea5SJeff Kirsher } 541874aeea5SJeff Kirsher 542874aeea5SJeff Kirsher channel->n_rx_frm_trunc = 0; 543874aeea5SJeff Kirsher 544874aeea5SJeff Kirsher return 0; 545874aeea5SJeff Kirsher 5467f967c01SBen Hutchings fail: 5477f967c01SBen Hutchings efx_remove_channel(channel); 548874aeea5SJeff Kirsher return rc; 549874aeea5SJeff Kirsher } 550874aeea5SJeff Kirsher 5517f967c01SBen Hutchings static void 5527f967c01SBen Hutchings efx_get_channel_name(struct efx_channel *channel, char *buf, size_t len) 5537f967c01SBen Hutchings { 5547f967c01SBen Hutchings struct efx_nic *efx = channel->efx; 5557f967c01SBen Hutchings const char *type; 5567f967c01SBen Hutchings int number; 5577f967c01SBen Hutchings 5587f967c01SBen Hutchings number = channel->channel; 5597f967c01SBen Hutchings if (efx->tx_channel_offset == 0) { 5607f967c01SBen Hutchings type = ""; 5617f967c01SBen Hutchings } else if (channel->channel < efx->tx_channel_offset) { 5627f967c01SBen Hutchings type = "-rx"; 5637f967c01SBen Hutchings } else { 5647f967c01SBen Hutchings type = "-tx"; 5657f967c01SBen Hutchings number -= efx->tx_channel_offset; 5667f967c01SBen Hutchings } 5677f967c01SBen Hutchings snprintf(buf, len, "%s%s-%d", efx->name, type, number); 5687f967c01SBen Hutchings } 569874aeea5SJeff Kirsher 570874aeea5SJeff Kirsher static void efx_set_channel_names(struct efx_nic *efx) 571874aeea5SJeff Kirsher { 572874aeea5SJeff Kirsher struct efx_channel *channel; 573874aeea5SJeff Kirsher 5747f967c01SBen Hutchings efx_for_each_channel(channel, efx) 5757f967c01SBen Hutchings channel->type->get_name(channel, 5767f967c01SBen Hutchings efx->channel_name[channel->channel], 5777f967c01SBen Hutchings sizeof(efx->channel_name[0])); 578874aeea5SJeff Kirsher } 579874aeea5SJeff Kirsher 580874aeea5SJeff Kirsher static int efx_probe_channels(struct efx_nic *efx) 581874aeea5SJeff Kirsher { 582874aeea5SJeff Kirsher struct efx_channel *channel; 583874aeea5SJeff Kirsher int rc; 584874aeea5SJeff Kirsher 585874aeea5SJeff Kirsher /* Restart special buffer allocation */ 586874aeea5SJeff Kirsher efx->next_buffer_table = 0; 587874aeea5SJeff Kirsher 588874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) { 589874aeea5SJeff Kirsher rc = efx_probe_channel(channel); 590874aeea5SJeff Kirsher if (rc) { 591874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 592874aeea5SJeff Kirsher "failed to create channel %d\n", 593874aeea5SJeff Kirsher channel->channel); 594874aeea5SJeff Kirsher goto fail; 595874aeea5SJeff Kirsher } 596874aeea5SJeff Kirsher } 597874aeea5SJeff Kirsher efx_set_channel_names(efx); 598874aeea5SJeff Kirsher 599874aeea5SJeff Kirsher return 0; 600874aeea5SJeff Kirsher 601874aeea5SJeff Kirsher fail: 602874aeea5SJeff Kirsher efx_remove_channels(efx); 603874aeea5SJeff Kirsher return rc; 604874aeea5SJeff Kirsher } 605874aeea5SJeff Kirsher 606874aeea5SJeff Kirsher /* Channels are shutdown and reinitialised whilst the NIC is running 607874aeea5SJeff Kirsher * to propagate configuration changes (mtu, checksum offload), or 608874aeea5SJeff Kirsher * to clear hardware error conditions 609874aeea5SJeff Kirsher */ 6109f2cb71cSBen Hutchings static void efx_start_datapath(struct efx_nic *efx) 611874aeea5SJeff Kirsher { 612874aeea5SJeff Kirsher struct efx_tx_queue *tx_queue; 613874aeea5SJeff Kirsher struct efx_rx_queue *rx_queue; 614874aeea5SJeff Kirsher struct efx_channel *channel; 615874aeea5SJeff Kirsher 616874aeea5SJeff Kirsher /* Calculate the rx buffer allocation parameters required to 617874aeea5SJeff Kirsher * support the current MTU, including padding for header 618874aeea5SJeff Kirsher * alignment and overruns. 619874aeea5SJeff Kirsher */ 620874aeea5SJeff Kirsher efx->rx_buffer_len = (max(EFX_PAGE_IP_ALIGN, NET_IP_ALIGN) + 621874aeea5SJeff Kirsher EFX_MAX_FRAME_LEN(efx->net_dev->mtu) + 622874aeea5SJeff Kirsher efx->type->rx_buffer_hash_size + 623874aeea5SJeff Kirsher efx->type->rx_buffer_padding); 624874aeea5SJeff Kirsher efx->rx_buffer_order = get_order(efx->rx_buffer_len + 625874aeea5SJeff Kirsher sizeof(struct efx_rx_page_state)); 626874aeea5SJeff Kirsher 627874aeea5SJeff Kirsher /* Initialise the channels */ 628874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) { 629874aeea5SJeff Kirsher efx_for_each_channel_tx_queue(tx_queue, channel) 630874aeea5SJeff Kirsher efx_init_tx_queue(tx_queue); 631874aeea5SJeff Kirsher 632874aeea5SJeff Kirsher /* The rx buffer allocation strategy is MTU dependent */ 633874aeea5SJeff Kirsher efx_rx_strategy(channel); 634874aeea5SJeff Kirsher 6359f2cb71cSBen Hutchings efx_for_each_channel_rx_queue(rx_queue, channel) { 636874aeea5SJeff Kirsher efx_init_rx_queue(rx_queue); 6379f2cb71cSBen Hutchings efx_nic_generate_fill_event(rx_queue); 6389f2cb71cSBen Hutchings } 639874aeea5SJeff Kirsher 640874aeea5SJeff Kirsher WARN_ON(channel->rx_pkt != NULL); 641874aeea5SJeff Kirsher efx_rx_strategy(channel); 642874aeea5SJeff Kirsher } 6439f2cb71cSBen Hutchings 6449f2cb71cSBen Hutchings if (netif_device_present(efx->net_dev)) 6459f2cb71cSBen Hutchings netif_tx_wake_all_queues(efx->net_dev); 646874aeea5SJeff Kirsher } 647874aeea5SJeff Kirsher 6489f2cb71cSBen Hutchings static void efx_stop_datapath(struct efx_nic *efx) 649874aeea5SJeff Kirsher { 650874aeea5SJeff Kirsher struct efx_channel *channel; 651874aeea5SJeff Kirsher struct efx_tx_queue *tx_queue; 652874aeea5SJeff Kirsher struct efx_rx_queue *rx_queue; 653874aeea5SJeff Kirsher int rc; 654874aeea5SJeff Kirsher 655874aeea5SJeff Kirsher EFX_ASSERT_RESET_SERIALISED(efx); 656874aeea5SJeff Kirsher BUG_ON(efx->port_enabled); 657874aeea5SJeff Kirsher 658874aeea5SJeff Kirsher rc = efx_nic_flush_queues(efx); 659874aeea5SJeff Kirsher if (rc && EFX_WORKAROUND_7803(efx)) { 660874aeea5SJeff Kirsher /* Schedule a reset to recover from the flush failure. The 661874aeea5SJeff Kirsher * descriptor caches reference memory we're about to free, 662874aeea5SJeff Kirsher * but falcon_reconfigure_mac_wrapper() won't reconnect 663874aeea5SJeff Kirsher * the MACs because of the pending reset. */ 664874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, 665874aeea5SJeff Kirsher "Resetting to recover from flush failure\n"); 666874aeea5SJeff Kirsher efx_schedule_reset(efx, RESET_TYPE_ALL); 667874aeea5SJeff Kirsher } else if (rc) { 668874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, "failed to flush queues\n"); 669874aeea5SJeff Kirsher } else { 670874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, 671874aeea5SJeff Kirsher "successfully flushed all queues\n"); 672874aeea5SJeff Kirsher } 673874aeea5SJeff Kirsher 674874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) { 6759f2cb71cSBen Hutchings /* RX packet processing is pipelined, so wait for the 6769f2cb71cSBen Hutchings * NAPI handler to complete. At least event queue 0 6779f2cb71cSBen Hutchings * might be kept active by non-data events, so don't 6789f2cb71cSBen Hutchings * use napi_synchronize() but actually disable NAPI 6799f2cb71cSBen Hutchings * temporarily. 6809f2cb71cSBen Hutchings */ 6819f2cb71cSBen Hutchings if (efx_channel_has_rx_queue(channel)) { 6829f2cb71cSBen Hutchings efx_stop_eventq(channel); 6839f2cb71cSBen Hutchings efx_start_eventq(channel); 6849f2cb71cSBen Hutchings } 685874aeea5SJeff Kirsher 686874aeea5SJeff Kirsher efx_for_each_channel_rx_queue(rx_queue, channel) 687874aeea5SJeff Kirsher efx_fini_rx_queue(rx_queue); 688874aeea5SJeff Kirsher efx_for_each_possible_channel_tx_queue(tx_queue, channel) 689874aeea5SJeff Kirsher efx_fini_tx_queue(tx_queue); 690874aeea5SJeff Kirsher } 691874aeea5SJeff Kirsher } 692874aeea5SJeff Kirsher 693874aeea5SJeff Kirsher static void efx_remove_channel(struct efx_channel *channel) 694874aeea5SJeff Kirsher { 695874aeea5SJeff Kirsher struct efx_tx_queue *tx_queue; 696874aeea5SJeff Kirsher struct efx_rx_queue *rx_queue; 697874aeea5SJeff Kirsher 698874aeea5SJeff Kirsher netif_dbg(channel->efx, drv, channel->efx->net_dev, 699874aeea5SJeff Kirsher "destroy chan %d\n", channel->channel); 700874aeea5SJeff Kirsher 701874aeea5SJeff Kirsher efx_for_each_channel_rx_queue(rx_queue, channel) 702874aeea5SJeff Kirsher efx_remove_rx_queue(rx_queue); 703874aeea5SJeff Kirsher efx_for_each_possible_channel_tx_queue(tx_queue, channel) 704874aeea5SJeff Kirsher efx_remove_tx_queue(tx_queue); 705874aeea5SJeff Kirsher efx_remove_eventq(channel); 706874aeea5SJeff Kirsher } 707874aeea5SJeff Kirsher 708874aeea5SJeff Kirsher static void efx_remove_channels(struct efx_nic *efx) 709874aeea5SJeff Kirsher { 710874aeea5SJeff Kirsher struct efx_channel *channel; 711874aeea5SJeff Kirsher 712874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) 713874aeea5SJeff Kirsher efx_remove_channel(channel); 714874aeea5SJeff Kirsher } 715874aeea5SJeff Kirsher 716874aeea5SJeff Kirsher int 717874aeea5SJeff Kirsher efx_realloc_channels(struct efx_nic *efx, u32 rxq_entries, u32 txq_entries) 718874aeea5SJeff Kirsher { 719874aeea5SJeff Kirsher struct efx_channel *other_channel[EFX_MAX_CHANNELS], *channel; 720874aeea5SJeff Kirsher u32 old_rxq_entries, old_txq_entries; 7217f967c01SBen Hutchings unsigned i, next_buffer_table = 0; 7227f967c01SBen Hutchings int rc = 0; 7237f967c01SBen Hutchings 7247f967c01SBen Hutchings /* Not all channels should be reallocated. We must avoid 7257f967c01SBen Hutchings * reallocating their buffer table entries. 7267f967c01SBen Hutchings */ 7277f967c01SBen Hutchings efx_for_each_channel(channel, efx) { 7287f967c01SBen Hutchings struct efx_rx_queue *rx_queue; 7297f967c01SBen Hutchings struct efx_tx_queue *tx_queue; 7307f967c01SBen Hutchings 7317f967c01SBen Hutchings if (channel->type->copy) 7327f967c01SBen Hutchings continue; 7337f967c01SBen Hutchings next_buffer_table = max(next_buffer_table, 7347f967c01SBen Hutchings channel->eventq.index + 7357f967c01SBen Hutchings channel->eventq.entries); 7367f967c01SBen Hutchings efx_for_each_channel_rx_queue(rx_queue, channel) 7377f967c01SBen Hutchings next_buffer_table = max(next_buffer_table, 7387f967c01SBen Hutchings rx_queue->rxd.index + 7397f967c01SBen Hutchings rx_queue->rxd.entries); 7407f967c01SBen Hutchings efx_for_each_channel_tx_queue(tx_queue, channel) 7417f967c01SBen Hutchings next_buffer_table = max(next_buffer_table, 7427f967c01SBen Hutchings tx_queue->txd.index + 7437f967c01SBen Hutchings tx_queue->txd.entries); 7447f967c01SBen Hutchings } 745874aeea5SJeff Kirsher 746874aeea5SJeff Kirsher efx_stop_all(efx); 7477f967c01SBen Hutchings efx_stop_interrupts(efx, true); 748874aeea5SJeff Kirsher 7497f967c01SBen Hutchings /* Clone channels (where possible) */ 750874aeea5SJeff Kirsher memset(other_channel, 0, sizeof(other_channel)); 751874aeea5SJeff Kirsher for (i = 0; i < efx->n_channels; i++) { 7527f967c01SBen Hutchings channel = efx->channel[i]; 7537f967c01SBen Hutchings if (channel->type->copy) 7547f967c01SBen Hutchings channel = channel->type->copy(channel); 755874aeea5SJeff Kirsher if (!channel) { 756874aeea5SJeff Kirsher rc = -ENOMEM; 757874aeea5SJeff Kirsher goto out; 758874aeea5SJeff Kirsher } 759874aeea5SJeff Kirsher other_channel[i] = channel; 760874aeea5SJeff Kirsher } 761874aeea5SJeff Kirsher 762874aeea5SJeff Kirsher /* Swap entry counts and channel pointers */ 763874aeea5SJeff Kirsher old_rxq_entries = efx->rxq_entries; 764874aeea5SJeff Kirsher old_txq_entries = efx->txq_entries; 765874aeea5SJeff Kirsher efx->rxq_entries = rxq_entries; 766874aeea5SJeff Kirsher efx->txq_entries = txq_entries; 767874aeea5SJeff Kirsher for (i = 0; i < efx->n_channels; i++) { 768874aeea5SJeff Kirsher channel = efx->channel[i]; 769874aeea5SJeff Kirsher efx->channel[i] = other_channel[i]; 770874aeea5SJeff Kirsher other_channel[i] = channel; 771874aeea5SJeff Kirsher } 772874aeea5SJeff Kirsher 7737f967c01SBen Hutchings /* Restart buffer table allocation */ 7747f967c01SBen Hutchings efx->next_buffer_table = next_buffer_table; 7757f967c01SBen Hutchings 7767f967c01SBen Hutchings for (i = 0; i < efx->n_channels; i++) { 7777f967c01SBen Hutchings channel = efx->channel[i]; 7787f967c01SBen Hutchings if (!channel->type->copy) 7797f967c01SBen Hutchings continue; 7807f967c01SBen Hutchings rc = efx_probe_channel(channel); 781874aeea5SJeff Kirsher if (rc) 782874aeea5SJeff Kirsher goto rollback; 7837f967c01SBen Hutchings efx_init_napi_channel(efx->channel[i]); 784874aeea5SJeff Kirsher } 785874aeea5SJeff Kirsher 7867f967c01SBen Hutchings out: 7877f967c01SBen Hutchings /* Destroy unused channel structures */ 7887f967c01SBen Hutchings for (i = 0; i < efx->n_channels; i++) { 7897f967c01SBen Hutchings channel = other_channel[i]; 7907f967c01SBen Hutchings if (channel && channel->type->copy) { 7917f967c01SBen Hutchings efx_fini_napi_channel(channel); 7927f967c01SBen Hutchings efx_remove_channel(channel); 7937f967c01SBen Hutchings kfree(channel); 7947f967c01SBen Hutchings } 7957f967c01SBen Hutchings } 7967f967c01SBen Hutchings 7977f967c01SBen Hutchings efx_start_interrupts(efx, true); 798874aeea5SJeff Kirsher efx_start_all(efx); 799874aeea5SJeff Kirsher return rc; 800874aeea5SJeff Kirsher 801874aeea5SJeff Kirsher rollback: 802874aeea5SJeff Kirsher /* Swap back */ 803874aeea5SJeff Kirsher efx->rxq_entries = old_rxq_entries; 804874aeea5SJeff Kirsher efx->txq_entries = old_txq_entries; 805874aeea5SJeff Kirsher for (i = 0; i < efx->n_channels; i++) { 806874aeea5SJeff Kirsher channel = efx->channel[i]; 807874aeea5SJeff Kirsher efx->channel[i] = other_channel[i]; 808874aeea5SJeff Kirsher other_channel[i] = channel; 809874aeea5SJeff Kirsher } 810874aeea5SJeff Kirsher goto out; 811874aeea5SJeff Kirsher } 812874aeea5SJeff Kirsher 813874aeea5SJeff Kirsher void efx_schedule_slow_fill(struct efx_rx_queue *rx_queue) 814874aeea5SJeff Kirsher { 815874aeea5SJeff Kirsher mod_timer(&rx_queue->slow_fill, jiffies + msecs_to_jiffies(100)); 816874aeea5SJeff Kirsher } 817874aeea5SJeff Kirsher 8187f967c01SBen Hutchings static const struct efx_channel_type efx_default_channel_type = { 8197f967c01SBen Hutchings .pre_probe = efx_channel_dummy_op_int, 8207f967c01SBen Hutchings .get_name = efx_get_channel_name, 8217f967c01SBen Hutchings .copy = efx_copy_channel, 8227f967c01SBen Hutchings .keep_eventq = false, 8237f967c01SBen Hutchings }; 8247f967c01SBen Hutchings 8257f967c01SBen Hutchings int efx_channel_dummy_op_int(struct efx_channel *channel) 8267f967c01SBen Hutchings { 8277f967c01SBen Hutchings return 0; 8287f967c01SBen Hutchings } 8297f967c01SBen Hutchings 830874aeea5SJeff Kirsher /************************************************************************** 831874aeea5SJeff Kirsher * 832874aeea5SJeff Kirsher * Port handling 833874aeea5SJeff Kirsher * 834874aeea5SJeff Kirsher **************************************************************************/ 835874aeea5SJeff Kirsher 836874aeea5SJeff Kirsher /* This ensures that the kernel is kept informed (via 837874aeea5SJeff Kirsher * netif_carrier_on/off) of the link status, and also maintains the 838874aeea5SJeff Kirsher * link status's stop on the port's TX queue. 839874aeea5SJeff Kirsher */ 840874aeea5SJeff Kirsher void efx_link_status_changed(struct efx_nic *efx) 841874aeea5SJeff Kirsher { 842874aeea5SJeff Kirsher struct efx_link_state *link_state = &efx->link_state; 843874aeea5SJeff Kirsher 844874aeea5SJeff Kirsher /* SFC Bug 5356: A net_dev notifier is registered, so we must ensure 845874aeea5SJeff Kirsher * that no events are triggered between unregister_netdev() and the 846874aeea5SJeff Kirsher * driver unloading. A more general condition is that NETDEV_CHANGE 847874aeea5SJeff Kirsher * can only be generated between NETDEV_UP and NETDEV_DOWN */ 848874aeea5SJeff Kirsher if (!netif_running(efx->net_dev)) 849874aeea5SJeff Kirsher return; 850874aeea5SJeff Kirsher 851874aeea5SJeff Kirsher if (link_state->up != netif_carrier_ok(efx->net_dev)) { 852874aeea5SJeff Kirsher efx->n_link_state_changes++; 853874aeea5SJeff Kirsher 854874aeea5SJeff Kirsher if (link_state->up) 855874aeea5SJeff Kirsher netif_carrier_on(efx->net_dev); 856874aeea5SJeff Kirsher else 857874aeea5SJeff Kirsher netif_carrier_off(efx->net_dev); 858874aeea5SJeff Kirsher } 859874aeea5SJeff Kirsher 860874aeea5SJeff Kirsher /* Status message for kernel log */ 8612aa9ef11SBen Hutchings if (link_state->up) 862874aeea5SJeff Kirsher netif_info(efx, link, efx->net_dev, 863874aeea5SJeff Kirsher "link up at %uMbps %s-duplex (MTU %d)%s\n", 864874aeea5SJeff Kirsher link_state->speed, link_state->fd ? "full" : "half", 865874aeea5SJeff Kirsher efx->net_dev->mtu, 866874aeea5SJeff Kirsher (efx->promiscuous ? " [PROMISC]" : "")); 8672aa9ef11SBen Hutchings else 868874aeea5SJeff Kirsher netif_info(efx, link, efx->net_dev, "link down\n"); 869874aeea5SJeff Kirsher } 870874aeea5SJeff Kirsher 871874aeea5SJeff Kirsher void efx_link_set_advertising(struct efx_nic *efx, u32 advertising) 872874aeea5SJeff Kirsher { 873874aeea5SJeff Kirsher efx->link_advertising = advertising; 874874aeea5SJeff Kirsher if (advertising) { 875874aeea5SJeff Kirsher if (advertising & ADVERTISED_Pause) 876874aeea5SJeff Kirsher efx->wanted_fc |= (EFX_FC_TX | EFX_FC_RX); 877874aeea5SJeff Kirsher else 878874aeea5SJeff Kirsher efx->wanted_fc &= ~(EFX_FC_TX | EFX_FC_RX); 879874aeea5SJeff Kirsher if (advertising & ADVERTISED_Asym_Pause) 880874aeea5SJeff Kirsher efx->wanted_fc ^= EFX_FC_TX; 881874aeea5SJeff Kirsher } 882874aeea5SJeff Kirsher } 883874aeea5SJeff Kirsher 884874aeea5SJeff Kirsher void efx_link_set_wanted_fc(struct efx_nic *efx, u8 wanted_fc) 885874aeea5SJeff Kirsher { 886874aeea5SJeff Kirsher efx->wanted_fc = wanted_fc; 887874aeea5SJeff Kirsher if (efx->link_advertising) { 888874aeea5SJeff Kirsher if (wanted_fc & EFX_FC_RX) 889874aeea5SJeff Kirsher efx->link_advertising |= (ADVERTISED_Pause | 890874aeea5SJeff Kirsher ADVERTISED_Asym_Pause); 891874aeea5SJeff Kirsher else 892874aeea5SJeff Kirsher efx->link_advertising &= ~(ADVERTISED_Pause | 893874aeea5SJeff Kirsher ADVERTISED_Asym_Pause); 894874aeea5SJeff Kirsher if (wanted_fc & EFX_FC_TX) 895874aeea5SJeff Kirsher efx->link_advertising ^= ADVERTISED_Asym_Pause; 896874aeea5SJeff Kirsher } 897874aeea5SJeff Kirsher } 898874aeea5SJeff Kirsher 899874aeea5SJeff Kirsher static void efx_fini_port(struct efx_nic *efx); 900874aeea5SJeff Kirsher 901874aeea5SJeff Kirsher /* Push loopback/power/transmit disable settings to the PHY, and reconfigure 902874aeea5SJeff Kirsher * the MAC appropriately. All other PHY configuration changes are pushed 903874aeea5SJeff Kirsher * through phy_op->set_settings(), and pushed asynchronously to the MAC 904874aeea5SJeff Kirsher * through efx_monitor(). 905874aeea5SJeff Kirsher * 906874aeea5SJeff Kirsher * Callers must hold the mac_lock 907874aeea5SJeff Kirsher */ 908874aeea5SJeff Kirsher int __efx_reconfigure_port(struct efx_nic *efx) 909874aeea5SJeff Kirsher { 910874aeea5SJeff Kirsher enum efx_phy_mode phy_mode; 911874aeea5SJeff Kirsher int rc; 912874aeea5SJeff Kirsher 913874aeea5SJeff Kirsher WARN_ON(!mutex_is_locked(&efx->mac_lock)); 914874aeea5SJeff Kirsher 9150fca8c97SBen Hutchings /* Serialise the promiscuous flag with efx_set_rx_mode. */ 916874aeea5SJeff Kirsher netif_addr_lock_bh(efx->net_dev); 917874aeea5SJeff Kirsher netif_addr_unlock_bh(efx->net_dev); 918874aeea5SJeff Kirsher 919874aeea5SJeff Kirsher /* Disable PHY transmit in mac level loopbacks */ 920874aeea5SJeff Kirsher phy_mode = efx->phy_mode; 921874aeea5SJeff Kirsher if (LOOPBACK_INTERNAL(efx)) 922874aeea5SJeff Kirsher efx->phy_mode |= PHY_MODE_TX_DISABLED; 923874aeea5SJeff Kirsher else 924874aeea5SJeff Kirsher efx->phy_mode &= ~PHY_MODE_TX_DISABLED; 925874aeea5SJeff Kirsher 926874aeea5SJeff Kirsher rc = efx->type->reconfigure_port(efx); 927874aeea5SJeff Kirsher 928874aeea5SJeff Kirsher if (rc) 929874aeea5SJeff Kirsher efx->phy_mode = phy_mode; 930874aeea5SJeff Kirsher 931874aeea5SJeff Kirsher return rc; 932874aeea5SJeff Kirsher } 933874aeea5SJeff Kirsher 934874aeea5SJeff Kirsher /* Reinitialise the MAC to pick up new PHY settings, even if the port is 935874aeea5SJeff Kirsher * disabled. */ 936874aeea5SJeff Kirsher int efx_reconfigure_port(struct efx_nic *efx) 937874aeea5SJeff Kirsher { 938874aeea5SJeff Kirsher int rc; 939874aeea5SJeff Kirsher 940874aeea5SJeff Kirsher EFX_ASSERT_RESET_SERIALISED(efx); 941874aeea5SJeff Kirsher 942874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 943874aeea5SJeff Kirsher rc = __efx_reconfigure_port(efx); 944874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 945874aeea5SJeff Kirsher 946874aeea5SJeff Kirsher return rc; 947874aeea5SJeff Kirsher } 948874aeea5SJeff Kirsher 949874aeea5SJeff Kirsher /* Asynchronous work item for changing MAC promiscuity and multicast 950874aeea5SJeff Kirsher * hash. Avoid a drain/rx_ingress enable by reconfiguring the current 951874aeea5SJeff Kirsher * MAC directly. */ 952874aeea5SJeff Kirsher static void efx_mac_work(struct work_struct *data) 953874aeea5SJeff Kirsher { 954874aeea5SJeff Kirsher struct efx_nic *efx = container_of(data, struct efx_nic, mac_work); 955874aeea5SJeff Kirsher 956874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 95730b81cdaSBen Hutchings if (efx->port_enabled) 958710b208dSBen Hutchings efx->type->reconfigure_mac(efx); 959874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 960874aeea5SJeff Kirsher } 961874aeea5SJeff Kirsher 962874aeea5SJeff Kirsher static int efx_probe_port(struct efx_nic *efx) 963874aeea5SJeff Kirsher { 964874aeea5SJeff Kirsher int rc; 965874aeea5SJeff Kirsher 966874aeea5SJeff Kirsher netif_dbg(efx, probe, efx->net_dev, "create port\n"); 967874aeea5SJeff Kirsher 968874aeea5SJeff Kirsher if (phy_flash_cfg) 969874aeea5SJeff Kirsher efx->phy_mode = PHY_MODE_SPECIAL; 970874aeea5SJeff Kirsher 971874aeea5SJeff Kirsher /* Connect up MAC/PHY operations table */ 972874aeea5SJeff Kirsher rc = efx->type->probe_port(efx); 973874aeea5SJeff Kirsher if (rc) 974874aeea5SJeff Kirsher return rc; 975874aeea5SJeff Kirsher 976e332bcb3SBen Hutchings /* Initialise MAC address to permanent address */ 977e332bcb3SBen Hutchings memcpy(efx->net_dev->dev_addr, efx->net_dev->perm_addr, ETH_ALEN); 978874aeea5SJeff Kirsher 979874aeea5SJeff Kirsher return 0; 980874aeea5SJeff Kirsher } 981874aeea5SJeff Kirsher 982874aeea5SJeff Kirsher static int efx_init_port(struct efx_nic *efx) 983874aeea5SJeff Kirsher { 984874aeea5SJeff Kirsher int rc; 985874aeea5SJeff Kirsher 986874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "init port\n"); 987874aeea5SJeff Kirsher 988874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 989874aeea5SJeff Kirsher 990874aeea5SJeff Kirsher rc = efx->phy_op->init(efx); 991874aeea5SJeff Kirsher if (rc) 992874aeea5SJeff Kirsher goto fail1; 993874aeea5SJeff Kirsher 994874aeea5SJeff Kirsher efx->port_initialized = true; 995874aeea5SJeff Kirsher 996874aeea5SJeff Kirsher /* Reconfigure the MAC before creating dma queues (required for 997874aeea5SJeff Kirsher * Falcon/A1 where RX_INGR_EN/TX_DRAIN_EN isn't supported) */ 998710b208dSBen Hutchings efx->type->reconfigure_mac(efx); 999874aeea5SJeff Kirsher 1000874aeea5SJeff Kirsher /* Ensure the PHY advertises the correct flow control settings */ 1001874aeea5SJeff Kirsher rc = efx->phy_op->reconfigure(efx); 1002874aeea5SJeff Kirsher if (rc) 1003874aeea5SJeff Kirsher goto fail2; 1004874aeea5SJeff Kirsher 1005874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 1006874aeea5SJeff Kirsher return 0; 1007874aeea5SJeff Kirsher 1008874aeea5SJeff Kirsher fail2: 1009874aeea5SJeff Kirsher efx->phy_op->fini(efx); 1010874aeea5SJeff Kirsher fail1: 1011874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 1012874aeea5SJeff Kirsher return rc; 1013874aeea5SJeff Kirsher } 1014874aeea5SJeff Kirsher 1015874aeea5SJeff Kirsher static void efx_start_port(struct efx_nic *efx) 1016874aeea5SJeff Kirsher { 1017874aeea5SJeff Kirsher netif_dbg(efx, ifup, efx->net_dev, "start port\n"); 1018874aeea5SJeff Kirsher BUG_ON(efx->port_enabled); 1019874aeea5SJeff Kirsher 1020874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 1021874aeea5SJeff Kirsher efx->port_enabled = true; 1022874aeea5SJeff Kirsher 1023874aeea5SJeff Kirsher /* efx_mac_work() might have been scheduled after efx_stop_port(), 1024874aeea5SJeff Kirsher * and then cancelled by efx_flush_all() */ 1025710b208dSBen Hutchings efx->type->reconfigure_mac(efx); 1026874aeea5SJeff Kirsher 1027874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 1028874aeea5SJeff Kirsher } 1029874aeea5SJeff Kirsher 1030874aeea5SJeff Kirsher /* Prevent efx_mac_work() and efx_monitor() from working */ 1031874aeea5SJeff Kirsher static void efx_stop_port(struct efx_nic *efx) 1032874aeea5SJeff Kirsher { 1033874aeea5SJeff Kirsher netif_dbg(efx, ifdown, efx->net_dev, "stop port\n"); 1034874aeea5SJeff Kirsher 1035874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 1036874aeea5SJeff Kirsher efx->port_enabled = false; 1037874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 1038874aeea5SJeff Kirsher 1039874aeea5SJeff Kirsher /* Serialise against efx_set_multicast_list() */ 1040874aeea5SJeff Kirsher netif_addr_lock_bh(efx->net_dev); 1041874aeea5SJeff Kirsher netif_addr_unlock_bh(efx->net_dev); 1042874aeea5SJeff Kirsher } 1043874aeea5SJeff Kirsher 1044874aeea5SJeff Kirsher static void efx_fini_port(struct efx_nic *efx) 1045874aeea5SJeff Kirsher { 1046874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "shut down port\n"); 1047874aeea5SJeff Kirsher 1048874aeea5SJeff Kirsher if (!efx->port_initialized) 1049874aeea5SJeff Kirsher return; 1050874aeea5SJeff Kirsher 1051874aeea5SJeff Kirsher efx->phy_op->fini(efx); 1052874aeea5SJeff Kirsher efx->port_initialized = false; 1053874aeea5SJeff Kirsher 1054874aeea5SJeff Kirsher efx->link_state.up = false; 1055874aeea5SJeff Kirsher efx_link_status_changed(efx); 1056874aeea5SJeff Kirsher } 1057874aeea5SJeff Kirsher 1058874aeea5SJeff Kirsher static void efx_remove_port(struct efx_nic *efx) 1059874aeea5SJeff Kirsher { 1060874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "destroying port\n"); 1061874aeea5SJeff Kirsher 1062874aeea5SJeff Kirsher efx->type->remove_port(efx); 1063874aeea5SJeff Kirsher } 1064874aeea5SJeff Kirsher 1065874aeea5SJeff Kirsher /************************************************************************** 1066874aeea5SJeff Kirsher * 1067874aeea5SJeff Kirsher * NIC handling 1068874aeea5SJeff Kirsher * 1069874aeea5SJeff Kirsher **************************************************************************/ 1070874aeea5SJeff Kirsher 1071874aeea5SJeff Kirsher /* This configures the PCI device to enable I/O and DMA. */ 1072874aeea5SJeff Kirsher static int efx_init_io(struct efx_nic *efx) 1073874aeea5SJeff Kirsher { 1074874aeea5SJeff Kirsher struct pci_dev *pci_dev = efx->pci_dev; 1075874aeea5SJeff Kirsher dma_addr_t dma_mask = efx->type->max_dma_mask; 1076874aeea5SJeff Kirsher int rc; 1077874aeea5SJeff Kirsher 1078874aeea5SJeff Kirsher netif_dbg(efx, probe, efx->net_dev, "initialising I/O\n"); 1079874aeea5SJeff Kirsher 1080874aeea5SJeff Kirsher rc = pci_enable_device(pci_dev); 1081874aeea5SJeff Kirsher if (rc) { 1082874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 1083874aeea5SJeff Kirsher "failed to enable PCI device\n"); 1084874aeea5SJeff Kirsher goto fail1; 1085874aeea5SJeff Kirsher } 1086874aeea5SJeff Kirsher 1087874aeea5SJeff Kirsher pci_set_master(pci_dev); 1088874aeea5SJeff Kirsher 1089874aeea5SJeff Kirsher /* Set the PCI DMA mask. Try all possibilities from our 1090874aeea5SJeff Kirsher * genuine mask down to 32 bits, because some architectures 1091874aeea5SJeff Kirsher * (e.g. x86_64 with iommu_sac_force set) will allow 40 bit 1092874aeea5SJeff Kirsher * masks event though they reject 46 bit masks. 1093874aeea5SJeff Kirsher */ 1094874aeea5SJeff Kirsher while (dma_mask > 0x7fffffffUL) { 1095e9e01846SBen Hutchings if (pci_dma_supported(pci_dev, dma_mask)) { 1096e9e01846SBen Hutchings rc = pci_set_dma_mask(pci_dev, dma_mask); 1097e9e01846SBen Hutchings if (rc == 0) 1098874aeea5SJeff Kirsher break; 1099e9e01846SBen Hutchings } 1100874aeea5SJeff Kirsher dma_mask >>= 1; 1101874aeea5SJeff Kirsher } 1102874aeea5SJeff Kirsher if (rc) { 1103874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 1104874aeea5SJeff Kirsher "could not find a suitable DMA mask\n"); 1105874aeea5SJeff Kirsher goto fail2; 1106874aeea5SJeff Kirsher } 1107874aeea5SJeff Kirsher netif_dbg(efx, probe, efx->net_dev, 1108874aeea5SJeff Kirsher "using DMA mask %llx\n", (unsigned long long) dma_mask); 1109874aeea5SJeff Kirsher rc = pci_set_consistent_dma_mask(pci_dev, dma_mask); 1110874aeea5SJeff Kirsher if (rc) { 1111874aeea5SJeff Kirsher /* pci_set_consistent_dma_mask() is not *allowed* to 1112874aeea5SJeff Kirsher * fail with a mask that pci_set_dma_mask() accepted, 1113874aeea5SJeff Kirsher * but just in case... 1114874aeea5SJeff Kirsher */ 1115874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 1116874aeea5SJeff Kirsher "failed to set consistent DMA mask\n"); 1117874aeea5SJeff Kirsher goto fail2; 1118874aeea5SJeff Kirsher } 1119874aeea5SJeff Kirsher 1120874aeea5SJeff Kirsher efx->membase_phys = pci_resource_start(efx->pci_dev, EFX_MEM_BAR); 1121874aeea5SJeff Kirsher rc = pci_request_region(pci_dev, EFX_MEM_BAR, "sfc"); 1122874aeea5SJeff Kirsher if (rc) { 1123874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 1124874aeea5SJeff Kirsher "request for memory BAR failed\n"); 1125874aeea5SJeff Kirsher rc = -EIO; 1126874aeea5SJeff Kirsher goto fail3; 1127874aeea5SJeff Kirsher } 1128874aeea5SJeff Kirsher efx->membase = ioremap_nocache(efx->membase_phys, 1129874aeea5SJeff Kirsher efx->type->mem_map_size); 1130874aeea5SJeff Kirsher if (!efx->membase) { 1131874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 1132874aeea5SJeff Kirsher "could not map memory BAR at %llx+%x\n", 1133874aeea5SJeff Kirsher (unsigned long long)efx->membase_phys, 1134874aeea5SJeff Kirsher efx->type->mem_map_size); 1135874aeea5SJeff Kirsher rc = -ENOMEM; 1136874aeea5SJeff Kirsher goto fail4; 1137874aeea5SJeff Kirsher } 1138874aeea5SJeff Kirsher netif_dbg(efx, probe, efx->net_dev, 1139874aeea5SJeff Kirsher "memory BAR at %llx+%x (virtual %p)\n", 1140874aeea5SJeff Kirsher (unsigned long long)efx->membase_phys, 1141874aeea5SJeff Kirsher efx->type->mem_map_size, efx->membase); 1142874aeea5SJeff Kirsher 1143874aeea5SJeff Kirsher return 0; 1144874aeea5SJeff Kirsher 1145874aeea5SJeff Kirsher fail4: 1146874aeea5SJeff Kirsher pci_release_region(efx->pci_dev, EFX_MEM_BAR); 1147874aeea5SJeff Kirsher fail3: 1148874aeea5SJeff Kirsher efx->membase_phys = 0; 1149874aeea5SJeff Kirsher fail2: 1150874aeea5SJeff Kirsher pci_disable_device(efx->pci_dev); 1151874aeea5SJeff Kirsher fail1: 1152874aeea5SJeff Kirsher return rc; 1153874aeea5SJeff Kirsher } 1154874aeea5SJeff Kirsher 1155874aeea5SJeff Kirsher static void efx_fini_io(struct efx_nic *efx) 1156874aeea5SJeff Kirsher { 1157874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "shutting down I/O\n"); 1158874aeea5SJeff Kirsher 1159874aeea5SJeff Kirsher if (efx->membase) { 1160874aeea5SJeff Kirsher iounmap(efx->membase); 1161874aeea5SJeff Kirsher efx->membase = NULL; 1162874aeea5SJeff Kirsher } 1163874aeea5SJeff Kirsher 1164874aeea5SJeff Kirsher if (efx->membase_phys) { 1165874aeea5SJeff Kirsher pci_release_region(efx->pci_dev, EFX_MEM_BAR); 1166874aeea5SJeff Kirsher efx->membase_phys = 0; 1167874aeea5SJeff Kirsher } 1168874aeea5SJeff Kirsher 1169874aeea5SJeff Kirsher pci_disable_device(efx->pci_dev); 1170874aeea5SJeff Kirsher } 1171874aeea5SJeff Kirsher 1172a9a52506SBen Hutchings static unsigned int efx_wanted_parallelism(struct efx_nic *efx) 1173874aeea5SJeff Kirsher { 1174cdb08f8fSBen Hutchings cpumask_var_t thread_mask; 1175a16e5b24SBen Hutchings unsigned int count; 1176874aeea5SJeff Kirsher int cpu; 1177874aeea5SJeff Kirsher 1178874aeea5SJeff Kirsher if (rss_cpus) 1179874aeea5SJeff Kirsher return rss_cpus; 1180874aeea5SJeff Kirsher 1181cdb08f8fSBen Hutchings if (unlikely(!zalloc_cpumask_var(&thread_mask, GFP_KERNEL))) { 1182a9a52506SBen Hutchings netif_warn(efx, probe, efx->net_dev, 1183a9a52506SBen Hutchings "RSS disabled due to allocation failure\n"); 1184874aeea5SJeff Kirsher return 1; 1185874aeea5SJeff Kirsher } 1186874aeea5SJeff Kirsher 1187874aeea5SJeff Kirsher count = 0; 1188874aeea5SJeff Kirsher for_each_online_cpu(cpu) { 1189cdb08f8fSBen Hutchings if (!cpumask_test_cpu(cpu, thread_mask)) { 1190874aeea5SJeff Kirsher ++count; 1191cdb08f8fSBen Hutchings cpumask_or(thread_mask, thread_mask, 1192cdb08f8fSBen Hutchings topology_thread_cpumask(cpu)); 1193874aeea5SJeff Kirsher } 1194874aeea5SJeff Kirsher } 1195874aeea5SJeff Kirsher 1196cdb08f8fSBen Hutchings free_cpumask_var(thread_mask); 1197874aeea5SJeff Kirsher return count; 1198874aeea5SJeff Kirsher } 1199874aeea5SJeff Kirsher 1200874aeea5SJeff Kirsher static int 1201874aeea5SJeff Kirsher efx_init_rx_cpu_rmap(struct efx_nic *efx, struct msix_entry *xentries) 1202874aeea5SJeff Kirsher { 1203874aeea5SJeff Kirsher #ifdef CONFIG_RFS_ACCEL 1204a16e5b24SBen Hutchings unsigned int i; 1205a16e5b24SBen Hutchings int rc; 1206874aeea5SJeff Kirsher 1207874aeea5SJeff Kirsher efx->net_dev->rx_cpu_rmap = alloc_irq_cpu_rmap(efx->n_rx_channels); 1208874aeea5SJeff Kirsher if (!efx->net_dev->rx_cpu_rmap) 1209874aeea5SJeff Kirsher return -ENOMEM; 1210874aeea5SJeff Kirsher for (i = 0; i < efx->n_rx_channels; i++) { 1211874aeea5SJeff Kirsher rc = irq_cpu_rmap_add(efx->net_dev->rx_cpu_rmap, 1212874aeea5SJeff Kirsher xentries[i].vector); 1213874aeea5SJeff Kirsher if (rc) { 1214874aeea5SJeff Kirsher free_irq_cpu_rmap(efx->net_dev->rx_cpu_rmap); 1215874aeea5SJeff Kirsher efx->net_dev->rx_cpu_rmap = NULL; 1216874aeea5SJeff Kirsher return rc; 1217874aeea5SJeff Kirsher } 1218874aeea5SJeff Kirsher } 1219874aeea5SJeff Kirsher #endif 1220874aeea5SJeff Kirsher return 0; 1221874aeea5SJeff Kirsher } 1222874aeea5SJeff Kirsher 1223874aeea5SJeff Kirsher /* Probe the number and type of interrupts we are able to obtain, and 1224874aeea5SJeff Kirsher * the resulting numbers of channels and RX queues. 1225874aeea5SJeff Kirsher */ 1226874aeea5SJeff Kirsher static int efx_probe_interrupts(struct efx_nic *efx) 1227874aeea5SJeff Kirsher { 1228a16e5b24SBen Hutchings unsigned int max_channels = 1229a16e5b24SBen Hutchings min(efx->type->phys_addr_channels, EFX_MAX_CHANNELS); 12307f967c01SBen Hutchings unsigned int extra_channels = 0; 12317f967c01SBen Hutchings unsigned int i, j; 1232a16e5b24SBen Hutchings int rc; 1233874aeea5SJeff Kirsher 12347f967c01SBen Hutchings for (i = 0; i < EFX_MAX_EXTRA_CHANNELS; i++) 12357f967c01SBen Hutchings if (efx->extra_channel_type[i]) 12367f967c01SBen Hutchings ++extra_channels; 12377f967c01SBen Hutchings 1238874aeea5SJeff Kirsher if (efx->interrupt_mode == EFX_INT_MODE_MSIX) { 1239874aeea5SJeff Kirsher struct msix_entry xentries[EFX_MAX_CHANNELS]; 1240a16e5b24SBen Hutchings unsigned int n_channels; 1241874aeea5SJeff Kirsher 1242a9a52506SBen Hutchings n_channels = efx_wanted_parallelism(efx); 1243874aeea5SJeff Kirsher if (separate_tx_channels) 1244874aeea5SJeff Kirsher n_channels *= 2; 12457f967c01SBen Hutchings n_channels += extra_channels; 1246874aeea5SJeff Kirsher n_channels = min(n_channels, max_channels); 1247874aeea5SJeff Kirsher 1248874aeea5SJeff Kirsher for (i = 0; i < n_channels; i++) 1249874aeea5SJeff Kirsher xentries[i].entry = i; 1250874aeea5SJeff Kirsher rc = pci_enable_msix(efx->pci_dev, xentries, n_channels); 1251874aeea5SJeff Kirsher if (rc > 0) { 1252874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, 1253874aeea5SJeff Kirsher "WARNING: Insufficient MSI-X vectors" 1254a16e5b24SBen Hutchings " available (%d < %u).\n", rc, n_channels); 1255874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, 1256874aeea5SJeff Kirsher "WARNING: Performance may be reduced.\n"); 1257874aeea5SJeff Kirsher EFX_BUG_ON_PARANOID(rc >= n_channels); 1258874aeea5SJeff Kirsher n_channels = rc; 1259874aeea5SJeff Kirsher rc = pci_enable_msix(efx->pci_dev, xentries, 1260874aeea5SJeff Kirsher n_channels); 1261874aeea5SJeff Kirsher } 1262874aeea5SJeff Kirsher 1263874aeea5SJeff Kirsher if (rc == 0) { 1264874aeea5SJeff Kirsher efx->n_channels = n_channels; 12657f967c01SBen Hutchings if (n_channels > extra_channels) 12667f967c01SBen Hutchings n_channels -= extra_channels; 1267874aeea5SJeff Kirsher if (separate_tx_channels) { 12687f967c01SBen Hutchings efx->n_tx_channels = max(n_channels / 2, 1U); 12697f967c01SBen Hutchings efx->n_rx_channels = max(n_channels - 12707f967c01SBen Hutchings efx->n_tx_channels, 12717f967c01SBen Hutchings 1U); 1272874aeea5SJeff Kirsher } else { 12737f967c01SBen Hutchings efx->n_tx_channels = n_channels; 12747f967c01SBen Hutchings efx->n_rx_channels = n_channels; 1275874aeea5SJeff Kirsher } 1276874aeea5SJeff Kirsher rc = efx_init_rx_cpu_rmap(efx, xentries); 1277874aeea5SJeff Kirsher if (rc) { 1278874aeea5SJeff Kirsher pci_disable_msix(efx->pci_dev); 1279874aeea5SJeff Kirsher return rc; 1280874aeea5SJeff Kirsher } 12817f967c01SBen Hutchings for (i = 0; i < efx->n_channels; i++) 1282874aeea5SJeff Kirsher efx_get_channel(efx, i)->irq = 1283874aeea5SJeff Kirsher xentries[i].vector; 1284874aeea5SJeff Kirsher } else { 1285874aeea5SJeff Kirsher /* Fall back to single channel MSI */ 1286874aeea5SJeff Kirsher efx->interrupt_mode = EFX_INT_MODE_MSI; 1287874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, 1288874aeea5SJeff Kirsher "could not enable MSI-X\n"); 1289874aeea5SJeff Kirsher } 1290874aeea5SJeff Kirsher } 1291874aeea5SJeff Kirsher 1292874aeea5SJeff Kirsher /* Try single interrupt MSI */ 1293874aeea5SJeff Kirsher if (efx->interrupt_mode == EFX_INT_MODE_MSI) { 1294874aeea5SJeff Kirsher efx->n_channels = 1; 1295874aeea5SJeff Kirsher efx->n_rx_channels = 1; 1296874aeea5SJeff Kirsher efx->n_tx_channels = 1; 1297874aeea5SJeff Kirsher rc = pci_enable_msi(efx->pci_dev); 1298874aeea5SJeff Kirsher if (rc == 0) { 1299874aeea5SJeff Kirsher efx_get_channel(efx, 0)->irq = efx->pci_dev->irq; 1300874aeea5SJeff Kirsher } else { 1301874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, 1302874aeea5SJeff Kirsher "could not enable MSI\n"); 1303874aeea5SJeff Kirsher efx->interrupt_mode = EFX_INT_MODE_LEGACY; 1304874aeea5SJeff Kirsher } 1305874aeea5SJeff Kirsher } 1306874aeea5SJeff Kirsher 1307874aeea5SJeff Kirsher /* Assume legacy interrupts */ 1308874aeea5SJeff Kirsher if (efx->interrupt_mode == EFX_INT_MODE_LEGACY) { 1309874aeea5SJeff Kirsher efx->n_channels = 1 + (separate_tx_channels ? 1 : 0); 1310874aeea5SJeff Kirsher efx->n_rx_channels = 1; 1311874aeea5SJeff Kirsher efx->n_tx_channels = 1; 1312874aeea5SJeff Kirsher efx->legacy_irq = efx->pci_dev->irq; 1313874aeea5SJeff Kirsher } 1314874aeea5SJeff Kirsher 13157f967c01SBen Hutchings /* Assign extra channels if possible */ 13167f967c01SBen Hutchings j = efx->n_channels; 13177f967c01SBen Hutchings for (i = 0; i < EFX_MAX_EXTRA_CHANNELS; i++) { 13187f967c01SBen Hutchings if (!efx->extra_channel_type[i]) 13197f967c01SBen Hutchings continue; 13207f967c01SBen Hutchings if (efx->interrupt_mode != EFX_INT_MODE_MSIX || 13217f967c01SBen Hutchings efx->n_channels <= extra_channels) { 13227f967c01SBen Hutchings efx->extra_channel_type[i]->handle_no_channel(efx); 13237f967c01SBen Hutchings } else { 13247f967c01SBen Hutchings --j; 13257f967c01SBen Hutchings efx_get_channel(efx, j)->type = 13267f967c01SBen Hutchings efx->extra_channel_type[i]; 13277f967c01SBen Hutchings } 13287f967c01SBen Hutchings } 13297f967c01SBen Hutchings 1330874aeea5SJeff Kirsher return 0; 1331874aeea5SJeff Kirsher } 1332874aeea5SJeff Kirsher 13339f2cb71cSBen Hutchings /* Enable interrupts, then probe and start the event queues */ 13347f967c01SBen Hutchings static void efx_start_interrupts(struct efx_nic *efx, bool may_keep_eventq) 13359f2cb71cSBen Hutchings { 13369f2cb71cSBen Hutchings struct efx_channel *channel; 13379f2cb71cSBen Hutchings 13389f2cb71cSBen Hutchings if (efx->legacy_irq) 13399f2cb71cSBen Hutchings efx->legacy_irq_enabled = true; 13409f2cb71cSBen Hutchings efx_nic_enable_interrupts(efx); 13419f2cb71cSBen Hutchings 13429f2cb71cSBen Hutchings efx_for_each_channel(channel, efx) { 13437f967c01SBen Hutchings if (!channel->type->keep_eventq || !may_keep_eventq) 13449f2cb71cSBen Hutchings efx_init_eventq(channel); 13459f2cb71cSBen Hutchings efx_start_eventq(channel); 13469f2cb71cSBen Hutchings } 13479f2cb71cSBen Hutchings 13489f2cb71cSBen Hutchings efx_mcdi_mode_event(efx); 13499f2cb71cSBen Hutchings } 13509f2cb71cSBen Hutchings 13517f967c01SBen Hutchings static void efx_stop_interrupts(struct efx_nic *efx, bool may_keep_eventq) 13529f2cb71cSBen Hutchings { 13539f2cb71cSBen Hutchings struct efx_channel *channel; 13549f2cb71cSBen Hutchings 13559f2cb71cSBen Hutchings efx_mcdi_mode_poll(efx); 13569f2cb71cSBen Hutchings 13579f2cb71cSBen Hutchings efx_nic_disable_interrupts(efx); 13589f2cb71cSBen Hutchings if (efx->legacy_irq) { 13599f2cb71cSBen Hutchings synchronize_irq(efx->legacy_irq); 13609f2cb71cSBen Hutchings efx->legacy_irq_enabled = false; 13619f2cb71cSBen Hutchings } 13629f2cb71cSBen Hutchings 13639f2cb71cSBen Hutchings efx_for_each_channel(channel, efx) { 13649f2cb71cSBen Hutchings if (channel->irq) 13659f2cb71cSBen Hutchings synchronize_irq(channel->irq); 13669f2cb71cSBen Hutchings 13679f2cb71cSBen Hutchings efx_stop_eventq(channel); 13687f967c01SBen Hutchings if (!channel->type->keep_eventq || !may_keep_eventq) 13699f2cb71cSBen Hutchings efx_fini_eventq(channel); 13709f2cb71cSBen Hutchings } 13719f2cb71cSBen Hutchings } 13729f2cb71cSBen Hutchings 1373874aeea5SJeff Kirsher static void efx_remove_interrupts(struct efx_nic *efx) 1374874aeea5SJeff Kirsher { 1375874aeea5SJeff Kirsher struct efx_channel *channel; 1376874aeea5SJeff Kirsher 1377874aeea5SJeff Kirsher /* Remove MSI/MSI-X interrupts */ 1378874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) 1379874aeea5SJeff Kirsher channel->irq = 0; 1380874aeea5SJeff Kirsher pci_disable_msi(efx->pci_dev); 1381874aeea5SJeff Kirsher pci_disable_msix(efx->pci_dev); 1382874aeea5SJeff Kirsher 1383874aeea5SJeff Kirsher /* Remove legacy interrupt */ 1384874aeea5SJeff Kirsher efx->legacy_irq = 0; 1385874aeea5SJeff Kirsher } 1386874aeea5SJeff Kirsher 1387874aeea5SJeff Kirsher static void efx_set_channels(struct efx_nic *efx) 1388874aeea5SJeff Kirsher { 1389874aeea5SJeff Kirsher struct efx_channel *channel; 1390874aeea5SJeff Kirsher struct efx_tx_queue *tx_queue; 1391874aeea5SJeff Kirsher 1392874aeea5SJeff Kirsher efx->tx_channel_offset = 1393874aeea5SJeff Kirsher separate_tx_channels ? efx->n_channels - efx->n_tx_channels : 0; 1394874aeea5SJeff Kirsher 1395874aeea5SJeff Kirsher /* We need to adjust the TX queue numbers if we have separate 1396874aeea5SJeff Kirsher * RX-only and TX-only channels. 1397874aeea5SJeff Kirsher */ 1398874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) { 1399874aeea5SJeff Kirsher efx_for_each_channel_tx_queue(tx_queue, channel) 1400874aeea5SJeff Kirsher tx_queue->queue -= (efx->tx_channel_offset * 1401874aeea5SJeff Kirsher EFX_TXQ_TYPES); 1402874aeea5SJeff Kirsher } 1403874aeea5SJeff Kirsher } 1404874aeea5SJeff Kirsher 1405874aeea5SJeff Kirsher static int efx_probe_nic(struct efx_nic *efx) 1406874aeea5SJeff Kirsher { 1407874aeea5SJeff Kirsher size_t i; 1408874aeea5SJeff Kirsher int rc; 1409874aeea5SJeff Kirsher 1410874aeea5SJeff Kirsher netif_dbg(efx, probe, efx->net_dev, "creating NIC\n"); 1411874aeea5SJeff Kirsher 1412874aeea5SJeff Kirsher /* Carry out hardware-type specific initialisation */ 1413874aeea5SJeff Kirsher rc = efx->type->probe(efx); 1414874aeea5SJeff Kirsher if (rc) 1415874aeea5SJeff Kirsher return rc; 1416874aeea5SJeff Kirsher 1417874aeea5SJeff Kirsher /* Determine the number of channels and queues by trying to hook 1418874aeea5SJeff Kirsher * in MSI-X interrupts. */ 1419874aeea5SJeff Kirsher rc = efx_probe_interrupts(efx); 1420874aeea5SJeff Kirsher if (rc) 1421874aeea5SJeff Kirsher goto fail; 1422874aeea5SJeff Kirsher 1423874aeea5SJeff Kirsher if (efx->n_channels > 1) 1424874aeea5SJeff Kirsher get_random_bytes(&efx->rx_hash_key, sizeof(efx->rx_hash_key)); 1425874aeea5SJeff Kirsher for (i = 0; i < ARRAY_SIZE(efx->rx_indir_table); i++) 1426278bc429SBen Hutchings efx->rx_indir_table[i] = 1427278bc429SBen Hutchings ethtool_rxfh_indir_default(i, efx->n_rx_channels); 1428874aeea5SJeff Kirsher 1429874aeea5SJeff Kirsher efx_set_channels(efx); 1430874aeea5SJeff Kirsher netif_set_real_num_tx_queues(efx->net_dev, efx->n_tx_channels); 1431874aeea5SJeff Kirsher netif_set_real_num_rx_queues(efx->net_dev, efx->n_rx_channels); 1432874aeea5SJeff Kirsher 1433874aeea5SJeff Kirsher /* Initialise the interrupt moderation settings */ 14349e393b30SBen Hutchings efx_init_irq_moderation(efx, tx_irq_mod_usec, rx_irq_mod_usec, true, 14359e393b30SBen Hutchings true); 1436874aeea5SJeff Kirsher 1437874aeea5SJeff Kirsher return 0; 1438874aeea5SJeff Kirsher 1439874aeea5SJeff Kirsher fail: 1440874aeea5SJeff Kirsher efx->type->remove(efx); 1441874aeea5SJeff Kirsher return rc; 1442874aeea5SJeff Kirsher } 1443874aeea5SJeff Kirsher 1444874aeea5SJeff Kirsher static void efx_remove_nic(struct efx_nic *efx) 1445874aeea5SJeff Kirsher { 1446874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "destroying NIC\n"); 1447874aeea5SJeff Kirsher 1448874aeea5SJeff Kirsher efx_remove_interrupts(efx); 1449874aeea5SJeff Kirsher efx->type->remove(efx); 1450874aeea5SJeff Kirsher } 1451874aeea5SJeff Kirsher 1452874aeea5SJeff Kirsher /************************************************************************** 1453874aeea5SJeff Kirsher * 1454874aeea5SJeff Kirsher * NIC startup/shutdown 1455874aeea5SJeff Kirsher * 1456874aeea5SJeff Kirsher *************************************************************************/ 1457874aeea5SJeff Kirsher 1458874aeea5SJeff Kirsher static int efx_probe_all(struct efx_nic *efx) 1459874aeea5SJeff Kirsher { 1460874aeea5SJeff Kirsher int rc; 1461874aeea5SJeff Kirsher 1462874aeea5SJeff Kirsher rc = efx_probe_nic(efx); 1463874aeea5SJeff Kirsher if (rc) { 1464874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, "failed to create NIC\n"); 1465874aeea5SJeff Kirsher goto fail1; 1466874aeea5SJeff Kirsher } 1467874aeea5SJeff Kirsher 1468874aeea5SJeff Kirsher rc = efx_probe_port(efx); 1469874aeea5SJeff Kirsher if (rc) { 1470874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, "failed to create port\n"); 1471874aeea5SJeff Kirsher goto fail2; 1472874aeea5SJeff Kirsher } 1473874aeea5SJeff Kirsher 1474874aeea5SJeff Kirsher efx->rxq_entries = efx->txq_entries = EFX_DEFAULT_DMAQ_SIZE; 1475874aeea5SJeff Kirsher 1476874aeea5SJeff Kirsher rc = efx_probe_filters(efx); 1477874aeea5SJeff Kirsher if (rc) { 1478874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 1479874aeea5SJeff Kirsher "failed to create filter tables\n"); 14807f967c01SBen Hutchings goto fail3; 1481874aeea5SJeff Kirsher } 1482874aeea5SJeff Kirsher 14837f967c01SBen Hutchings rc = efx_probe_channels(efx); 14847f967c01SBen Hutchings if (rc) 14857f967c01SBen Hutchings goto fail4; 14867f967c01SBen Hutchings 1487874aeea5SJeff Kirsher return 0; 1488874aeea5SJeff Kirsher 1489874aeea5SJeff Kirsher fail4: 14907f967c01SBen Hutchings efx_remove_filters(efx); 1491874aeea5SJeff Kirsher fail3: 1492874aeea5SJeff Kirsher efx_remove_port(efx); 1493874aeea5SJeff Kirsher fail2: 1494874aeea5SJeff Kirsher efx_remove_nic(efx); 1495874aeea5SJeff Kirsher fail1: 1496874aeea5SJeff Kirsher return rc; 1497874aeea5SJeff Kirsher } 1498874aeea5SJeff Kirsher 14999f2cb71cSBen Hutchings /* Called after previous invocation(s) of efx_stop_all, restarts the port, 15009f2cb71cSBen Hutchings * kernel transmit queues and NAPI processing, and ensures that the port is 15019f2cb71cSBen Hutchings * scheduled to be reconfigured. This function is safe to call multiple 15029f2cb71cSBen Hutchings * times when the NIC is in any state. 15039f2cb71cSBen Hutchings */ 1504874aeea5SJeff Kirsher static void efx_start_all(struct efx_nic *efx) 1505874aeea5SJeff Kirsher { 1506874aeea5SJeff Kirsher EFX_ASSERT_RESET_SERIALISED(efx); 1507874aeea5SJeff Kirsher 1508874aeea5SJeff Kirsher /* Check that it is appropriate to restart the interface. All 1509874aeea5SJeff Kirsher * of these flags are safe to read under just the rtnl lock */ 1510874aeea5SJeff Kirsher if (efx->port_enabled) 1511874aeea5SJeff Kirsher return; 1512874aeea5SJeff Kirsher if ((efx->state != STATE_RUNNING) && (efx->state != STATE_INIT)) 1513874aeea5SJeff Kirsher return; 151473ba7b68SBen Hutchings if (!netif_running(efx->net_dev)) 1515874aeea5SJeff Kirsher return; 1516874aeea5SJeff Kirsher 1517874aeea5SJeff Kirsher efx_start_port(efx); 15189f2cb71cSBen Hutchings efx_start_datapath(efx); 1519874aeea5SJeff Kirsher 1520874aeea5SJeff Kirsher /* Start the hardware monitor if there is one. Otherwise (we're link 1521874aeea5SJeff Kirsher * event driven), we have to poll the PHY because after an event queue 1522874aeea5SJeff Kirsher * flush, we could have a missed a link state change */ 1523874aeea5SJeff Kirsher if (efx->type->monitor != NULL) { 1524874aeea5SJeff Kirsher queue_delayed_work(efx->workqueue, &efx->monitor_work, 1525874aeea5SJeff Kirsher efx_monitor_interval); 1526874aeea5SJeff Kirsher } else { 1527874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 1528874aeea5SJeff Kirsher if (efx->phy_op->poll(efx)) 1529874aeea5SJeff Kirsher efx_link_status_changed(efx); 1530874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 1531874aeea5SJeff Kirsher } 1532874aeea5SJeff Kirsher 1533874aeea5SJeff Kirsher efx->type->start_stats(efx); 1534874aeea5SJeff Kirsher } 1535874aeea5SJeff Kirsher 1536874aeea5SJeff Kirsher /* Flush all delayed work. Should only be called when no more delayed work 1537874aeea5SJeff Kirsher * will be scheduled. This doesn't flush pending online resets (efx_reset), 1538874aeea5SJeff Kirsher * since we're holding the rtnl_lock at this point. */ 1539874aeea5SJeff Kirsher static void efx_flush_all(struct efx_nic *efx) 1540874aeea5SJeff Kirsher { 1541874aeea5SJeff Kirsher /* Make sure the hardware monitor is stopped */ 1542874aeea5SJeff Kirsher cancel_delayed_work_sync(&efx->monitor_work); 1543874aeea5SJeff Kirsher /* Stop scheduled port reconfigurations */ 1544874aeea5SJeff Kirsher cancel_work_sync(&efx->mac_work); 1545874aeea5SJeff Kirsher } 1546874aeea5SJeff Kirsher 1547874aeea5SJeff Kirsher /* Quiesce hardware and software without bringing the link down. 1548874aeea5SJeff Kirsher * Safe to call multiple times, when the nic and interface is in any 1549874aeea5SJeff Kirsher * state. The caller is guaranteed to subsequently be in a position 1550874aeea5SJeff Kirsher * to modify any hardware and software state they see fit without 1551874aeea5SJeff Kirsher * taking locks. */ 1552874aeea5SJeff Kirsher static void efx_stop_all(struct efx_nic *efx) 1553874aeea5SJeff Kirsher { 1554874aeea5SJeff Kirsher EFX_ASSERT_RESET_SERIALISED(efx); 1555874aeea5SJeff Kirsher 1556874aeea5SJeff Kirsher /* port_enabled can be read safely under the rtnl lock */ 1557874aeea5SJeff Kirsher if (!efx->port_enabled) 1558874aeea5SJeff Kirsher return; 1559874aeea5SJeff Kirsher 1560874aeea5SJeff Kirsher efx->type->stop_stats(efx); 1561874aeea5SJeff Kirsher efx_stop_port(efx); 1562874aeea5SJeff Kirsher 1563874aeea5SJeff Kirsher /* Flush efx_mac_work(), refill_workqueue, monitor_work */ 1564874aeea5SJeff Kirsher efx_flush_all(efx); 1565874aeea5SJeff Kirsher 1566874aeea5SJeff Kirsher /* Stop the kernel transmit interface late, so the watchdog 1567874aeea5SJeff Kirsher * timer isn't ticking over the flush */ 15689f2cb71cSBen Hutchings netif_tx_disable(efx->net_dev); 15699f2cb71cSBen Hutchings 15709f2cb71cSBen Hutchings efx_stop_datapath(efx); 1571874aeea5SJeff Kirsher } 1572874aeea5SJeff Kirsher 1573874aeea5SJeff Kirsher static void efx_remove_all(struct efx_nic *efx) 1574874aeea5SJeff Kirsher { 1575874aeea5SJeff Kirsher efx_remove_channels(efx); 15767f967c01SBen Hutchings efx_remove_filters(efx); 1577874aeea5SJeff Kirsher efx_remove_port(efx); 1578874aeea5SJeff Kirsher efx_remove_nic(efx); 1579874aeea5SJeff Kirsher } 1580874aeea5SJeff Kirsher 1581874aeea5SJeff Kirsher /************************************************************************** 1582874aeea5SJeff Kirsher * 1583874aeea5SJeff Kirsher * Interrupt moderation 1584874aeea5SJeff Kirsher * 1585874aeea5SJeff Kirsher **************************************************************************/ 1586874aeea5SJeff Kirsher 1587cc180b69SBen Hutchings static unsigned int irq_mod_ticks(unsigned int usecs, unsigned int quantum_ns) 1588874aeea5SJeff Kirsher { 1589b548f976SBen Hutchings if (usecs == 0) 1590b548f976SBen Hutchings return 0; 1591cc180b69SBen Hutchings if (usecs * 1000 < quantum_ns) 1592874aeea5SJeff Kirsher return 1; /* never round down to 0 */ 1593cc180b69SBen Hutchings return usecs * 1000 / quantum_ns; 1594874aeea5SJeff Kirsher } 1595874aeea5SJeff Kirsher 1596874aeea5SJeff Kirsher /* Set interrupt moderation parameters */ 15979e393b30SBen Hutchings int efx_init_irq_moderation(struct efx_nic *efx, unsigned int tx_usecs, 15989e393b30SBen Hutchings unsigned int rx_usecs, bool rx_adaptive, 15999e393b30SBen Hutchings bool rx_may_override_tx) 1600874aeea5SJeff Kirsher { 1601874aeea5SJeff Kirsher struct efx_channel *channel; 1602cc180b69SBen Hutchings unsigned int irq_mod_max = DIV_ROUND_UP(efx->type->timer_period_max * 1603cc180b69SBen Hutchings efx->timer_quantum_ns, 1604cc180b69SBen Hutchings 1000); 1605cc180b69SBen Hutchings unsigned int tx_ticks; 1606cc180b69SBen Hutchings unsigned int rx_ticks; 1607874aeea5SJeff Kirsher 1608874aeea5SJeff Kirsher EFX_ASSERT_RESET_SERIALISED(efx); 1609874aeea5SJeff Kirsher 1610cc180b69SBen Hutchings if (tx_usecs > irq_mod_max || rx_usecs > irq_mod_max) 16119e393b30SBen Hutchings return -EINVAL; 16129e393b30SBen Hutchings 1613cc180b69SBen Hutchings tx_ticks = irq_mod_ticks(tx_usecs, efx->timer_quantum_ns); 1614cc180b69SBen Hutchings rx_ticks = irq_mod_ticks(rx_usecs, efx->timer_quantum_ns); 1615cc180b69SBen Hutchings 16169e393b30SBen Hutchings if (tx_ticks != rx_ticks && efx->tx_channel_offset == 0 && 16179e393b30SBen Hutchings !rx_may_override_tx) { 16189e393b30SBen Hutchings netif_err(efx, drv, efx->net_dev, "Channels are shared. " 16199e393b30SBen Hutchings "RX and TX IRQ moderation must be equal\n"); 16209e393b30SBen Hutchings return -EINVAL; 16219e393b30SBen Hutchings } 16229e393b30SBen Hutchings 1623874aeea5SJeff Kirsher efx->irq_rx_adaptive = rx_adaptive; 1624874aeea5SJeff Kirsher efx->irq_rx_moderation = rx_ticks; 1625874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) { 1626874aeea5SJeff Kirsher if (efx_channel_has_rx_queue(channel)) 1627874aeea5SJeff Kirsher channel->irq_moderation = rx_ticks; 1628874aeea5SJeff Kirsher else if (efx_channel_has_tx_queues(channel)) 1629874aeea5SJeff Kirsher channel->irq_moderation = tx_ticks; 1630874aeea5SJeff Kirsher } 16319e393b30SBen Hutchings 16329e393b30SBen Hutchings return 0; 1633874aeea5SJeff Kirsher } 1634874aeea5SJeff Kirsher 1635a0c4faf5SBen Hutchings void efx_get_irq_moderation(struct efx_nic *efx, unsigned int *tx_usecs, 1636a0c4faf5SBen Hutchings unsigned int *rx_usecs, bool *rx_adaptive) 1637a0c4faf5SBen Hutchings { 1638cc180b69SBen Hutchings /* We must round up when converting ticks to microseconds 1639cc180b69SBen Hutchings * because we round down when converting the other way. 1640cc180b69SBen Hutchings */ 1641cc180b69SBen Hutchings 1642a0c4faf5SBen Hutchings *rx_adaptive = efx->irq_rx_adaptive; 1643cc180b69SBen Hutchings *rx_usecs = DIV_ROUND_UP(efx->irq_rx_moderation * 1644cc180b69SBen Hutchings efx->timer_quantum_ns, 1645cc180b69SBen Hutchings 1000); 1646a0c4faf5SBen Hutchings 1647a0c4faf5SBen Hutchings /* If channels are shared between RX and TX, so is IRQ 1648a0c4faf5SBen Hutchings * moderation. Otherwise, IRQ moderation is the same for all 1649a0c4faf5SBen Hutchings * TX channels and is not adaptive. 1650a0c4faf5SBen Hutchings */ 1651a0c4faf5SBen Hutchings if (efx->tx_channel_offset == 0) 1652a0c4faf5SBen Hutchings *tx_usecs = *rx_usecs; 1653a0c4faf5SBen Hutchings else 1654cc180b69SBen Hutchings *tx_usecs = DIV_ROUND_UP( 1655a0c4faf5SBen Hutchings efx->channel[efx->tx_channel_offset]->irq_moderation * 1656cc180b69SBen Hutchings efx->timer_quantum_ns, 1657cc180b69SBen Hutchings 1000); 1658a0c4faf5SBen Hutchings } 1659a0c4faf5SBen Hutchings 1660874aeea5SJeff Kirsher /************************************************************************** 1661874aeea5SJeff Kirsher * 1662874aeea5SJeff Kirsher * Hardware monitor 1663874aeea5SJeff Kirsher * 1664874aeea5SJeff Kirsher **************************************************************************/ 1665874aeea5SJeff Kirsher 1666874aeea5SJeff Kirsher /* Run periodically off the general workqueue */ 1667874aeea5SJeff Kirsher static void efx_monitor(struct work_struct *data) 1668874aeea5SJeff Kirsher { 1669874aeea5SJeff Kirsher struct efx_nic *efx = container_of(data, struct efx_nic, 1670874aeea5SJeff Kirsher monitor_work.work); 1671874aeea5SJeff Kirsher 1672874aeea5SJeff Kirsher netif_vdbg(efx, timer, efx->net_dev, 1673874aeea5SJeff Kirsher "hardware monitor executing on CPU %d\n", 1674874aeea5SJeff Kirsher raw_smp_processor_id()); 1675874aeea5SJeff Kirsher BUG_ON(efx->type->monitor == NULL); 1676874aeea5SJeff Kirsher 1677874aeea5SJeff Kirsher /* If the mac_lock is already held then it is likely a port 1678874aeea5SJeff Kirsher * reconfiguration is already in place, which will likely do 1679874aeea5SJeff Kirsher * most of the work of monitor() anyway. */ 1680874aeea5SJeff Kirsher if (mutex_trylock(&efx->mac_lock)) { 1681874aeea5SJeff Kirsher if (efx->port_enabled) 1682874aeea5SJeff Kirsher efx->type->monitor(efx); 1683874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 1684874aeea5SJeff Kirsher } 1685874aeea5SJeff Kirsher 1686874aeea5SJeff Kirsher queue_delayed_work(efx->workqueue, &efx->monitor_work, 1687874aeea5SJeff Kirsher efx_monitor_interval); 1688874aeea5SJeff Kirsher } 1689874aeea5SJeff Kirsher 1690874aeea5SJeff Kirsher /************************************************************************** 1691874aeea5SJeff Kirsher * 1692874aeea5SJeff Kirsher * ioctls 1693874aeea5SJeff Kirsher * 1694874aeea5SJeff Kirsher *************************************************************************/ 1695874aeea5SJeff Kirsher 1696874aeea5SJeff Kirsher /* Net device ioctl 1697874aeea5SJeff Kirsher * Context: process, rtnl_lock() held. 1698874aeea5SJeff Kirsher */ 1699874aeea5SJeff Kirsher static int efx_ioctl(struct net_device *net_dev, struct ifreq *ifr, int cmd) 1700874aeea5SJeff Kirsher { 1701874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 1702874aeea5SJeff Kirsher struct mii_ioctl_data *data = if_mii(ifr); 1703874aeea5SJeff Kirsher 1704874aeea5SJeff Kirsher EFX_ASSERT_RESET_SERIALISED(efx); 1705874aeea5SJeff Kirsher 1706874aeea5SJeff Kirsher /* Convert phy_id from older PRTAD/DEVAD format */ 1707874aeea5SJeff Kirsher if ((cmd == SIOCGMIIREG || cmd == SIOCSMIIREG) && 1708874aeea5SJeff Kirsher (data->phy_id & 0xfc00) == 0x0400) 1709874aeea5SJeff Kirsher data->phy_id ^= MDIO_PHY_ID_C45 | 0x0400; 1710874aeea5SJeff Kirsher 1711874aeea5SJeff Kirsher return mdio_mii_ioctl(&efx->mdio, data, cmd); 1712874aeea5SJeff Kirsher } 1713874aeea5SJeff Kirsher 1714874aeea5SJeff Kirsher /************************************************************************** 1715874aeea5SJeff Kirsher * 1716874aeea5SJeff Kirsher * NAPI interface 1717874aeea5SJeff Kirsher * 1718874aeea5SJeff Kirsher **************************************************************************/ 1719874aeea5SJeff Kirsher 17207f967c01SBen Hutchings static void efx_init_napi_channel(struct efx_channel *channel) 1721874aeea5SJeff Kirsher { 17227f967c01SBen Hutchings struct efx_nic *efx = channel->efx; 1723874aeea5SJeff Kirsher 1724874aeea5SJeff Kirsher channel->napi_dev = efx->net_dev; 1725874aeea5SJeff Kirsher netif_napi_add(channel->napi_dev, &channel->napi_str, 1726874aeea5SJeff Kirsher efx_poll, napi_weight); 1727874aeea5SJeff Kirsher } 17287f967c01SBen Hutchings 17297f967c01SBen Hutchings static void efx_init_napi(struct efx_nic *efx) 17307f967c01SBen Hutchings { 17317f967c01SBen Hutchings struct efx_channel *channel; 17327f967c01SBen Hutchings 17337f967c01SBen Hutchings efx_for_each_channel(channel, efx) 17347f967c01SBen Hutchings efx_init_napi_channel(channel); 1735874aeea5SJeff Kirsher } 1736874aeea5SJeff Kirsher 1737874aeea5SJeff Kirsher static void efx_fini_napi_channel(struct efx_channel *channel) 1738874aeea5SJeff Kirsher { 1739874aeea5SJeff Kirsher if (channel->napi_dev) 1740874aeea5SJeff Kirsher netif_napi_del(&channel->napi_str); 1741874aeea5SJeff Kirsher channel->napi_dev = NULL; 1742874aeea5SJeff Kirsher } 1743874aeea5SJeff Kirsher 1744874aeea5SJeff Kirsher static void efx_fini_napi(struct efx_nic *efx) 1745874aeea5SJeff Kirsher { 1746874aeea5SJeff Kirsher struct efx_channel *channel; 1747874aeea5SJeff Kirsher 1748874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) 1749874aeea5SJeff Kirsher efx_fini_napi_channel(channel); 1750874aeea5SJeff Kirsher } 1751874aeea5SJeff Kirsher 1752874aeea5SJeff Kirsher /************************************************************************** 1753874aeea5SJeff Kirsher * 1754874aeea5SJeff Kirsher * Kernel netpoll interface 1755874aeea5SJeff Kirsher * 1756874aeea5SJeff Kirsher *************************************************************************/ 1757874aeea5SJeff Kirsher 1758874aeea5SJeff Kirsher #ifdef CONFIG_NET_POLL_CONTROLLER 1759874aeea5SJeff Kirsher 1760874aeea5SJeff Kirsher /* Although in the common case interrupts will be disabled, this is not 1761874aeea5SJeff Kirsher * guaranteed. However, all our work happens inside the NAPI callback, 1762874aeea5SJeff Kirsher * so no locking is required. 1763874aeea5SJeff Kirsher */ 1764874aeea5SJeff Kirsher static void efx_netpoll(struct net_device *net_dev) 1765874aeea5SJeff Kirsher { 1766874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 1767874aeea5SJeff Kirsher struct efx_channel *channel; 1768874aeea5SJeff Kirsher 1769874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) 1770874aeea5SJeff Kirsher efx_schedule_channel(channel); 1771874aeea5SJeff Kirsher } 1772874aeea5SJeff Kirsher 1773874aeea5SJeff Kirsher #endif 1774874aeea5SJeff Kirsher 1775874aeea5SJeff Kirsher /************************************************************************** 1776874aeea5SJeff Kirsher * 1777874aeea5SJeff Kirsher * Kernel net device interface 1778874aeea5SJeff Kirsher * 1779874aeea5SJeff Kirsher *************************************************************************/ 1780874aeea5SJeff Kirsher 1781874aeea5SJeff Kirsher /* Context: process, rtnl_lock() held. */ 1782874aeea5SJeff Kirsher static int efx_net_open(struct net_device *net_dev) 1783874aeea5SJeff Kirsher { 1784874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 1785874aeea5SJeff Kirsher EFX_ASSERT_RESET_SERIALISED(efx); 1786874aeea5SJeff Kirsher 1787874aeea5SJeff Kirsher netif_dbg(efx, ifup, efx->net_dev, "opening device on CPU %d\n", 1788874aeea5SJeff Kirsher raw_smp_processor_id()); 1789874aeea5SJeff Kirsher 1790874aeea5SJeff Kirsher if (efx->state == STATE_DISABLED) 1791874aeea5SJeff Kirsher return -EIO; 1792874aeea5SJeff Kirsher if (efx->phy_mode & PHY_MODE_SPECIAL) 1793874aeea5SJeff Kirsher return -EBUSY; 1794874aeea5SJeff Kirsher if (efx_mcdi_poll_reboot(efx) && efx_reset(efx, RESET_TYPE_ALL)) 1795874aeea5SJeff Kirsher return -EIO; 1796874aeea5SJeff Kirsher 1797874aeea5SJeff Kirsher /* Notify the kernel of the link state polled during driver load, 1798874aeea5SJeff Kirsher * before the monitor starts running */ 1799874aeea5SJeff Kirsher efx_link_status_changed(efx); 1800874aeea5SJeff Kirsher 1801874aeea5SJeff Kirsher efx_start_all(efx); 1802874aeea5SJeff Kirsher return 0; 1803874aeea5SJeff Kirsher } 1804874aeea5SJeff Kirsher 1805874aeea5SJeff Kirsher /* Context: process, rtnl_lock() held. 1806874aeea5SJeff Kirsher * Note that the kernel will ignore our return code; this method 1807874aeea5SJeff Kirsher * should really be a void. 1808874aeea5SJeff Kirsher */ 1809874aeea5SJeff Kirsher static int efx_net_stop(struct net_device *net_dev) 1810874aeea5SJeff Kirsher { 1811874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 1812874aeea5SJeff Kirsher 1813874aeea5SJeff Kirsher netif_dbg(efx, ifdown, efx->net_dev, "closing on CPU %d\n", 1814874aeea5SJeff Kirsher raw_smp_processor_id()); 1815874aeea5SJeff Kirsher 1816874aeea5SJeff Kirsher if (efx->state != STATE_DISABLED) { 1817874aeea5SJeff Kirsher /* Stop the device and flush all the channels */ 1818874aeea5SJeff Kirsher efx_stop_all(efx); 1819874aeea5SJeff Kirsher } 1820874aeea5SJeff Kirsher 1821874aeea5SJeff Kirsher return 0; 1822874aeea5SJeff Kirsher } 1823874aeea5SJeff Kirsher 1824874aeea5SJeff Kirsher /* Context: process, dev_base_lock or RTNL held, non-blocking. */ 18252aa9ef11SBen Hutchings static struct rtnl_link_stats64 *efx_net_stats(struct net_device *net_dev, 18262aa9ef11SBen Hutchings struct rtnl_link_stats64 *stats) 1827874aeea5SJeff Kirsher { 1828874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 1829874aeea5SJeff Kirsher struct efx_mac_stats *mac_stats = &efx->mac_stats; 1830874aeea5SJeff Kirsher 1831874aeea5SJeff Kirsher spin_lock_bh(&efx->stats_lock); 18321cb34522SBen Hutchings 1833874aeea5SJeff Kirsher efx->type->update_stats(efx); 1834874aeea5SJeff Kirsher 1835874aeea5SJeff Kirsher stats->rx_packets = mac_stats->rx_packets; 1836874aeea5SJeff Kirsher stats->tx_packets = mac_stats->tx_packets; 1837874aeea5SJeff Kirsher stats->rx_bytes = mac_stats->rx_bytes; 1838874aeea5SJeff Kirsher stats->tx_bytes = mac_stats->tx_bytes; 1839874aeea5SJeff Kirsher stats->rx_dropped = efx->n_rx_nodesc_drop_cnt; 1840874aeea5SJeff Kirsher stats->multicast = mac_stats->rx_multicast; 1841874aeea5SJeff Kirsher stats->collisions = mac_stats->tx_collision; 1842874aeea5SJeff Kirsher stats->rx_length_errors = (mac_stats->rx_gtjumbo + 1843874aeea5SJeff Kirsher mac_stats->rx_length_error); 1844874aeea5SJeff Kirsher stats->rx_crc_errors = mac_stats->rx_bad; 1845874aeea5SJeff Kirsher stats->rx_frame_errors = mac_stats->rx_align_error; 1846874aeea5SJeff Kirsher stats->rx_fifo_errors = mac_stats->rx_overflow; 1847874aeea5SJeff Kirsher stats->rx_missed_errors = mac_stats->rx_missed; 1848874aeea5SJeff Kirsher stats->tx_window_errors = mac_stats->tx_late_collision; 1849874aeea5SJeff Kirsher 1850874aeea5SJeff Kirsher stats->rx_errors = (stats->rx_length_errors + 1851874aeea5SJeff Kirsher stats->rx_crc_errors + 1852874aeea5SJeff Kirsher stats->rx_frame_errors + 1853874aeea5SJeff Kirsher mac_stats->rx_symbol_error); 1854874aeea5SJeff Kirsher stats->tx_errors = (stats->tx_window_errors + 1855874aeea5SJeff Kirsher mac_stats->tx_bad); 1856874aeea5SJeff Kirsher 18571cb34522SBen Hutchings spin_unlock_bh(&efx->stats_lock); 18581cb34522SBen Hutchings 1859874aeea5SJeff Kirsher return stats; 1860874aeea5SJeff Kirsher } 1861874aeea5SJeff Kirsher 1862874aeea5SJeff Kirsher /* Context: netif_tx_lock held, BHs disabled. */ 1863874aeea5SJeff Kirsher static void efx_watchdog(struct net_device *net_dev) 1864874aeea5SJeff Kirsher { 1865874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 1866874aeea5SJeff Kirsher 1867874aeea5SJeff Kirsher netif_err(efx, tx_err, efx->net_dev, 1868874aeea5SJeff Kirsher "TX stuck with port_enabled=%d: resetting channels\n", 1869874aeea5SJeff Kirsher efx->port_enabled); 1870874aeea5SJeff Kirsher 1871874aeea5SJeff Kirsher efx_schedule_reset(efx, RESET_TYPE_TX_WATCHDOG); 1872874aeea5SJeff Kirsher } 1873874aeea5SJeff Kirsher 1874874aeea5SJeff Kirsher 1875874aeea5SJeff Kirsher /* Context: process, rtnl_lock() held. */ 1876874aeea5SJeff Kirsher static int efx_change_mtu(struct net_device *net_dev, int new_mtu) 1877874aeea5SJeff Kirsher { 1878874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 1879874aeea5SJeff Kirsher 1880874aeea5SJeff Kirsher EFX_ASSERT_RESET_SERIALISED(efx); 1881874aeea5SJeff Kirsher 1882874aeea5SJeff Kirsher if (new_mtu > EFX_MAX_MTU) 1883874aeea5SJeff Kirsher return -EINVAL; 1884874aeea5SJeff Kirsher 1885874aeea5SJeff Kirsher efx_stop_all(efx); 1886874aeea5SJeff Kirsher 1887874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "changing MTU to %d\n", new_mtu); 1888874aeea5SJeff Kirsher 1889874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 1890874aeea5SJeff Kirsher /* Reconfigure the MAC before enabling the dma queues so that 1891874aeea5SJeff Kirsher * the RX buffers don't overflow */ 1892874aeea5SJeff Kirsher net_dev->mtu = new_mtu; 1893710b208dSBen Hutchings efx->type->reconfigure_mac(efx); 1894874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 1895874aeea5SJeff Kirsher 1896874aeea5SJeff Kirsher efx_start_all(efx); 18976c8eef4aSBen Hutchings return 0; 1898874aeea5SJeff Kirsher } 1899874aeea5SJeff Kirsher 1900874aeea5SJeff Kirsher static int efx_set_mac_address(struct net_device *net_dev, void *data) 1901874aeea5SJeff Kirsher { 1902874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 1903874aeea5SJeff Kirsher struct sockaddr *addr = data; 1904874aeea5SJeff Kirsher char *new_addr = addr->sa_data; 1905874aeea5SJeff Kirsher 1906874aeea5SJeff Kirsher EFX_ASSERT_RESET_SERIALISED(efx); 1907874aeea5SJeff Kirsher 1908874aeea5SJeff Kirsher if (!is_valid_ether_addr(new_addr)) { 1909874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, 1910874aeea5SJeff Kirsher "invalid ethernet MAC address requested: %pM\n", 1911874aeea5SJeff Kirsher new_addr); 1912874aeea5SJeff Kirsher return -EINVAL; 1913874aeea5SJeff Kirsher } 1914874aeea5SJeff Kirsher 1915874aeea5SJeff Kirsher memcpy(net_dev->dev_addr, new_addr, net_dev->addr_len); 1916874aeea5SJeff Kirsher 1917874aeea5SJeff Kirsher /* Reconfigure the MAC */ 1918874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 1919710b208dSBen Hutchings efx->type->reconfigure_mac(efx); 1920874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 1921874aeea5SJeff Kirsher 1922874aeea5SJeff Kirsher return 0; 1923874aeea5SJeff Kirsher } 1924874aeea5SJeff Kirsher 1925874aeea5SJeff Kirsher /* Context: netif_addr_lock held, BHs disabled. */ 19260fca8c97SBen Hutchings static void efx_set_rx_mode(struct net_device *net_dev) 1927874aeea5SJeff Kirsher { 1928874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 1929874aeea5SJeff Kirsher struct netdev_hw_addr *ha; 1930874aeea5SJeff Kirsher union efx_multicast_hash *mc_hash = &efx->multicast_hash; 1931874aeea5SJeff Kirsher u32 crc; 1932874aeea5SJeff Kirsher int bit; 1933874aeea5SJeff Kirsher 1934874aeea5SJeff Kirsher efx->promiscuous = !!(net_dev->flags & IFF_PROMISC); 1935874aeea5SJeff Kirsher 1936874aeea5SJeff Kirsher /* Build multicast hash table */ 1937874aeea5SJeff Kirsher if (efx->promiscuous || (net_dev->flags & IFF_ALLMULTI)) { 1938874aeea5SJeff Kirsher memset(mc_hash, 0xff, sizeof(*mc_hash)); 1939874aeea5SJeff Kirsher } else { 1940874aeea5SJeff Kirsher memset(mc_hash, 0x00, sizeof(*mc_hash)); 1941874aeea5SJeff Kirsher netdev_for_each_mc_addr(ha, net_dev) { 1942874aeea5SJeff Kirsher crc = ether_crc_le(ETH_ALEN, ha->addr); 1943874aeea5SJeff Kirsher bit = crc & (EFX_MCAST_HASH_ENTRIES - 1); 1944874aeea5SJeff Kirsher set_bit_le(bit, mc_hash->byte); 1945874aeea5SJeff Kirsher } 1946874aeea5SJeff Kirsher 1947874aeea5SJeff Kirsher /* Broadcast packets go through the multicast hash filter. 1948874aeea5SJeff Kirsher * ether_crc_le() of the broadcast address is 0xbe2612ff 1949874aeea5SJeff Kirsher * so we always add bit 0xff to the mask. 1950874aeea5SJeff Kirsher */ 1951874aeea5SJeff Kirsher set_bit_le(0xff, mc_hash->byte); 1952874aeea5SJeff Kirsher } 1953874aeea5SJeff Kirsher 1954874aeea5SJeff Kirsher if (efx->port_enabled) 1955874aeea5SJeff Kirsher queue_work(efx->workqueue, &efx->mac_work); 1956874aeea5SJeff Kirsher /* Otherwise efx_start_port() will do this */ 1957874aeea5SJeff Kirsher } 1958874aeea5SJeff Kirsher 1959c8f44affSMichał Mirosław static int efx_set_features(struct net_device *net_dev, netdev_features_t data) 1960874aeea5SJeff Kirsher { 1961874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 1962874aeea5SJeff Kirsher 1963874aeea5SJeff Kirsher /* If disabling RX n-tuple filtering, clear existing filters */ 1964874aeea5SJeff Kirsher if (net_dev->features & ~data & NETIF_F_NTUPLE) 1965874aeea5SJeff Kirsher efx_filter_clear_rx(efx, EFX_FILTER_PRI_MANUAL); 1966874aeea5SJeff Kirsher 1967874aeea5SJeff Kirsher return 0; 1968874aeea5SJeff Kirsher } 1969874aeea5SJeff Kirsher 1970874aeea5SJeff Kirsher static const struct net_device_ops efx_netdev_ops = { 1971874aeea5SJeff Kirsher .ndo_open = efx_net_open, 1972874aeea5SJeff Kirsher .ndo_stop = efx_net_stop, 1973874aeea5SJeff Kirsher .ndo_get_stats64 = efx_net_stats, 1974874aeea5SJeff Kirsher .ndo_tx_timeout = efx_watchdog, 1975874aeea5SJeff Kirsher .ndo_start_xmit = efx_hard_start_xmit, 1976874aeea5SJeff Kirsher .ndo_validate_addr = eth_validate_addr, 1977874aeea5SJeff Kirsher .ndo_do_ioctl = efx_ioctl, 1978874aeea5SJeff Kirsher .ndo_change_mtu = efx_change_mtu, 1979874aeea5SJeff Kirsher .ndo_set_mac_address = efx_set_mac_address, 19800fca8c97SBen Hutchings .ndo_set_rx_mode = efx_set_rx_mode, 1981874aeea5SJeff Kirsher .ndo_set_features = efx_set_features, 1982874aeea5SJeff Kirsher #ifdef CONFIG_NET_POLL_CONTROLLER 1983874aeea5SJeff Kirsher .ndo_poll_controller = efx_netpoll, 1984874aeea5SJeff Kirsher #endif 1985874aeea5SJeff Kirsher .ndo_setup_tc = efx_setup_tc, 1986874aeea5SJeff Kirsher #ifdef CONFIG_RFS_ACCEL 1987874aeea5SJeff Kirsher .ndo_rx_flow_steer = efx_filter_rfs, 1988874aeea5SJeff Kirsher #endif 1989874aeea5SJeff Kirsher }; 1990874aeea5SJeff Kirsher 1991874aeea5SJeff Kirsher static void efx_update_name(struct efx_nic *efx) 1992874aeea5SJeff Kirsher { 1993874aeea5SJeff Kirsher strcpy(efx->name, efx->net_dev->name); 1994874aeea5SJeff Kirsher efx_mtd_rename(efx); 1995874aeea5SJeff Kirsher efx_set_channel_names(efx); 1996874aeea5SJeff Kirsher } 1997874aeea5SJeff Kirsher 1998874aeea5SJeff Kirsher static int efx_netdev_event(struct notifier_block *this, 1999874aeea5SJeff Kirsher unsigned long event, void *ptr) 2000874aeea5SJeff Kirsher { 2001874aeea5SJeff Kirsher struct net_device *net_dev = ptr; 2002874aeea5SJeff Kirsher 2003874aeea5SJeff Kirsher if (net_dev->netdev_ops == &efx_netdev_ops && 2004874aeea5SJeff Kirsher event == NETDEV_CHANGENAME) 2005874aeea5SJeff Kirsher efx_update_name(netdev_priv(net_dev)); 2006874aeea5SJeff Kirsher 2007874aeea5SJeff Kirsher return NOTIFY_DONE; 2008874aeea5SJeff Kirsher } 2009874aeea5SJeff Kirsher 2010874aeea5SJeff Kirsher static struct notifier_block efx_netdev_notifier = { 2011874aeea5SJeff Kirsher .notifier_call = efx_netdev_event, 2012874aeea5SJeff Kirsher }; 2013874aeea5SJeff Kirsher 2014874aeea5SJeff Kirsher static ssize_t 2015874aeea5SJeff Kirsher show_phy_type(struct device *dev, struct device_attribute *attr, char *buf) 2016874aeea5SJeff Kirsher { 2017874aeea5SJeff Kirsher struct efx_nic *efx = pci_get_drvdata(to_pci_dev(dev)); 2018874aeea5SJeff Kirsher return sprintf(buf, "%d\n", efx->phy_type); 2019874aeea5SJeff Kirsher } 2020874aeea5SJeff Kirsher static DEVICE_ATTR(phy_type, 0644, show_phy_type, NULL); 2021874aeea5SJeff Kirsher 2022874aeea5SJeff Kirsher static int efx_register_netdev(struct efx_nic *efx) 2023874aeea5SJeff Kirsher { 2024874aeea5SJeff Kirsher struct net_device *net_dev = efx->net_dev; 2025874aeea5SJeff Kirsher struct efx_channel *channel; 2026874aeea5SJeff Kirsher int rc; 2027874aeea5SJeff Kirsher 2028874aeea5SJeff Kirsher net_dev->watchdog_timeo = 5 * HZ; 2029874aeea5SJeff Kirsher net_dev->irq = efx->pci_dev->irq; 2030874aeea5SJeff Kirsher net_dev->netdev_ops = &efx_netdev_ops; 2031874aeea5SJeff Kirsher SET_ETHTOOL_OPS(net_dev, &efx_ethtool_ops); 2032874aeea5SJeff Kirsher 2033874aeea5SJeff Kirsher rtnl_lock(); 2034874aeea5SJeff Kirsher 2035874aeea5SJeff Kirsher rc = dev_alloc_name(net_dev, net_dev->name); 2036874aeea5SJeff Kirsher if (rc < 0) 2037874aeea5SJeff Kirsher goto fail_locked; 2038874aeea5SJeff Kirsher efx_update_name(efx); 2039874aeea5SJeff Kirsher 2040874aeea5SJeff Kirsher rc = register_netdevice(net_dev); 2041874aeea5SJeff Kirsher if (rc) 2042874aeea5SJeff Kirsher goto fail_locked; 2043874aeea5SJeff Kirsher 2044874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) { 2045874aeea5SJeff Kirsher struct efx_tx_queue *tx_queue; 2046874aeea5SJeff Kirsher efx_for_each_channel_tx_queue(tx_queue, channel) 2047874aeea5SJeff Kirsher efx_init_tx_queue_core_txq(tx_queue); 2048874aeea5SJeff Kirsher } 2049874aeea5SJeff Kirsher 2050874aeea5SJeff Kirsher /* Always start with carrier off; PHY events will detect the link */ 205186ee5302SBen Hutchings netif_carrier_off(net_dev); 2052874aeea5SJeff Kirsher 2053874aeea5SJeff Kirsher rtnl_unlock(); 2054874aeea5SJeff Kirsher 2055874aeea5SJeff Kirsher rc = device_create_file(&efx->pci_dev->dev, &dev_attr_phy_type); 2056874aeea5SJeff Kirsher if (rc) { 2057874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, 2058874aeea5SJeff Kirsher "failed to init net dev attributes\n"); 2059874aeea5SJeff Kirsher goto fail_registered; 2060874aeea5SJeff Kirsher } 2061874aeea5SJeff Kirsher 2062874aeea5SJeff Kirsher return 0; 2063874aeea5SJeff Kirsher 2064874aeea5SJeff Kirsher fail_locked: 2065874aeea5SJeff Kirsher rtnl_unlock(); 2066874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, "could not register net dev\n"); 2067874aeea5SJeff Kirsher return rc; 2068874aeea5SJeff Kirsher 2069874aeea5SJeff Kirsher fail_registered: 2070874aeea5SJeff Kirsher unregister_netdev(net_dev); 2071874aeea5SJeff Kirsher return rc; 2072874aeea5SJeff Kirsher } 2073874aeea5SJeff Kirsher 2074874aeea5SJeff Kirsher static void efx_unregister_netdev(struct efx_nic *efx) 2075874aeea5SJeff Kirsher { 2076874aeea5SJeff Kirsher struct efx_channel *channel; 2077874aeea5SJeff Kirsher struct efx_tx_queue *tx_queue; 2078874aeea5SJeff Kirsher 2079874aeea5SJeff Kirsher if (!efx->net_dev) 2080874aeea5SJeff Kirsher return; 2081874aeea5SJeff Kirsher 2082874aeea5SJeff Kirsher BUG_ON(netdev_priv(efx->net_dev) != efx); 2083874aeea5SJeff Kirsher 2084874aeea5SJeff Kirsher /* Free up any skbs still remaining. This has to happen before 2085874aeea5SJeff Kirsher * we try to unregister the netdev as running their destructors 2086874aeea5SJeff Kirsher * may be needed to get the device ref. count to 0. */ 2087874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) { 2088874aeea5SJeff Kirsher efx_for_each_channel_tx_queue(tx_queue, channel) 2089874aeea5SJeff Kirsher efx_release_tx_buffers(tx_queue); 2090874aeea5SJeff Kirsher } 2091874aeea5SJeff Kirsher 2092874aeea5SJeff Kirsher strlcpy(efx->name, pci_name(efx->pci_dev), sizeof(efx->name)); 2093874aeea5SJeff Kirsher device_remove_file(&efx->pci_dev->dev, &dev_attr_phy_type); 2094874aeea5SJeff Kirsher unregister_netdev(efx->net_dev); 2095874aeea5SJeff Kirsher } 2096874aeea5SJeff Kirsher 2097874aeea5SJeff Kirsher /************************************************************************** 2098874aeea5SJeff Kirsher * 2099874aeea5SJeff Kirsher * Device reset and suspend 2100874aeea5SJeff Kirsher * 2101874aeea5SJeff Kirsher **************************************************************************/ 2102874aeea5SJeff Kirsher 2103874aeea5SJeff Kirsher /* Tears down the entire software state and most of the hardware state 2104874aeea5SJeff Kirsher * before reset. */ 2105874aeea5SJeff Kirsher void efx_reset_down(struct efx_nic *efx, enum reset_type method) 2106874aeea5SJeff Kirsher { 2107874aeea5SJeff Kirsher EFX_ASSERT_RESET_SERIALISED(efx); 2108874aeea5SJeff Kirsher 2109874aeea5SJeff Kirsher efx_stop_all(efx); 2110874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 2111874aeea5SJeff Kirsher 21127f967c01SBen Hutchings efx_stop_interrupts(efx, false); 2113874aeea5SJeff Kirsher if (efx->port_initialized && method != RESET_TYPE_INVISIBLE) 2114874aeea5SJeff Kirsher efx->phy_op->fini(efx); 2115874aeea5SJeff Kirsher efx->type->fini(efx); 2116874aeea5SJeff Kirsher } 2117874aeea5SJeff Kirsher 2118874aeea5SJeff Kirsher /* This function will always ensure that the locks acquired in 2119874aeea5SJeff Kirsher * efx_reset_down() are released. A failure return code indicates 2120874aeea5SJeff Kirsher * that we were unable to reinitialise the hardware, and the 2121874aeea5SJeff Kirsher * driver should be disabled. If ok is false, then the rx and tx 2122874aeea5SJeff Kirsher * engines are not restarted, pending a RESET_DISABLE. */ 2123874aeea5SJeff Kirsher int efx_reset_up(struct efx_nic *efx, enum reset_type method, bool ok) 2124874aeea5SJeff Kirsher { 2125874aeea5SJeff Kirsher int rc; 2126874aeea5SJeff Kirsher 2127874aeea5SJeff Kirsher EFX_ASSERT_RESET_SERIALISED(efx); 2128874aeea5SJeff Kirsher 2129874aeea5SJeff Kirsher rc = efx->type->init(efx); 2130874aeea5SJeff Kirsher if (rc) { 2131874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, "failed to initialise NIC\n"); 2132874aeea5SJeff Kirsher goto fail; 2133874aeea5SJeff Kirsher } 2134874aeea5SJeff Kirsher 2135874aeea5SJeff Kirsher if (!ok) 2136874aeea5SJeff Kirsher goto fail; 2137874aeea5SJeff Kirsher 2138874aeea5SJeff Kirsher if (efx->port_initialized && method != RESET_TYPE_INVISIBLE) { 2139874aeea5SJeff Kirsher rc = efx->phy_op->init(efx); 2140874aeea5SJeff Kirsher if (rc) 2141874aeea5SJeff Kirsher goto fail; 2142874aeea5SJeff Kirsher if (efx->phy_op->reconfigure(efx)) 2143874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, 2144874aeea5SJeff Kirsher "could not restore PHY settings\n"); 2145874aeea5SJeff Kirsher } 2146874aeea5SJeff Kirsher 2147710b208dSBen Hutchings efx->type->reconfigure_mac(efx); 2148874aeea5SJeff Kirsher 21497f967c01SBen Hutchings efx_start_interrupts(efx, false); 2150874aeea5SJeff Kirsher efx_restore_filters(efx); 2151874aeea5SJeff Kirsher 2152874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 2153874aeea5SJeff Kirsher 2154874aeea5SJeff Kirsher efx_start_all(efx); 2155874aeea5SJeff Kirsher 2156874aeea5SJeff Kirsher return 0; 2157874aeea5SJeff Kirsher 2158874aeea5SJeff Kirsher fail: 2159874aeea5SJeff Kirsher efx->port_initialized = false; 2160874aeea5SJeff Kirsher 2161874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 2162874aeea5SJeff Kirsher 2163874aeea5SJeff Kirsher return rc; 2164874aeea5SJeff Kirsher } 2165874aeea5SJeff Kirsher 2166874aeea5SJeff Kirsher /* Reset the NIC using the specified method. Note that the reset may 2167874aeea5SJeff Kirsher * fail, in which case the card will be left in an unusable state. 2168874aeea5SJeff Kirsher * 2169874aeea5SJeff Kirsher * Caller must hold the rtnl_lock. 2170874aeea5SJeff Kirsher */ 2171874aeea5SJeff Kirsher int efx_reset(struct efx_nic *efx, enum reset_type method) 2172874aeea5SJeff Kirsher { 2173874aeea5SJeff Kirsher int rc, rc2; 2174874aeea5SJeff Kirsher bool disabled; 2175874aeea5SJeff Kirsher 2176874aeea5SJeff Kirsher netif_info(efx, drv, efx->net_dev, "resetting (%s)\n", 2177874aeea5SJeff Kirsher RESET_TYPE(method)); 2178874aeea5SJeff Kirsher 2179874aeea5SJeff Kirsher netif_device_detach(efx->net_dev); 2180874aeea5SJeff Kirsher efx_reset_down(efx, method); 2181874aeea5SJeff Kirsher 2182874aeea5SJeff Kirsher rc = efx->type->reset(efx, method); 2183874aeea5SJeff Kirsher if (rc) { 2184874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, "failed to reset hardware\n"); 2185874aeea5SJeff Kirsher goto out; 2186874aeea5SJeff Kirsher } 2187874aeea5SJeff Kirsher 2188874aeea5SJeff Kirsher /* Clear flags for the scopes we covered. We assume the NIC and 2189874aeea5SJeff Kirsher * driver are now quiescent so that there is no race here. 2190874aeea5SJeff Kirsher */ 2191874aeea5SJeff Kirsher efx->reset_pending &= -(1 << (method + 1)); 2192874aeea5SJeff Kirsher 2193874aeea5SJeff Kirsher /* Reinitialise bus-mastering, which may have been turned off before 2194874aeea5SJeff Kirsher * the reset was scheduled. This is still appropriate, even in the 2195874aeea5SJeff Kirsher * RESET_TYPE_DISABLE since this driver generally assumes the hardware 2196874aeea5SJeff Kirsher * can respond to requests. */ 2197874aeea5SJeff Kirsher pci_set_master(efx->pci_dev); 2198874aeea5SJeff Kirsher 2199874aeea5SJeff Kirsher out: 2200874aeea5SJeff Kirsher /* Leave device stopped if necessary */ 2201874aeea5SJeff Kirsher disabled = rc || method == RESET_TYPE_DISABLE; 2202874aeea5SJeff Kirsher rc2 = efx_reset_up(efx, method, !disabled); 2203874aeea5SJeff Kirsher if (rc2) { 2204874aeea5SJeff Kirsher disabled = true; 2205874aeea5SJeff Kirsher if (!rc) 2206874aeea5SJeff Kirsher rc = rc2; 2207874aeea5SJeff Kirsher } 2208874aeea5SJeff Kirsher 2209874aeea5SJeff Kirsher if (disabled) { 2210874aeea5SJeff Kirsher dev_close(efx->net_dev); 2211874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, "has been disabled\n"); 2212874aeea5SJeff Kirsher efx->state = STATE_DISABLED; 2213874aeea5SJeff Kirsher } else { 2214874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "reset complete\n"); 2215874aeea5SJeff Kirsher netif_device_attach(efx->net_dev); 2216874aeea5SJeff Kirsher } 2217874aeea5SJeff Kirsher return rc; 2218874aeea5SJeff Kirsher } 2219874aeea5SJeff Kirsher 2220874aeea5SJeff Kirsher /* The worker thread exists so that code that cannot sleep can 2221874aeea5SJeff Kirsher * schedule a reset for later. 2222874aeea5SJeff Kirsher */ 2223874aeea5SJeff Kirsher static void efx_reset_work(struct work_struct *data) 2224874aeea5SJeff Kirsher { 2225874aeea5SJeff Kirsher struct efx_nic *efx = container_of(data, struct efx_nic, reset_work); 2226874aeea5SJeff Kirsher unsigned long pending = ACCESS_ONCE(efx->reset_pending); 2227874aeea5SJeff Kirsher 2228874aeea5SJeff Kirsher if (!pending) 2229874aeea5SJeff Kirsher return; 2230874aeea5SJeff Kirsher 2231874aeea5SJeff Kirsher /* If we're not RUNNING then don't reset. Leave the reset_pending 2232874aeea5SJeff Kirsher * flags set so that efx_pci_probe_main will be retried */ 2233874aeea5SJeff Kirsher if (efx->state != STATE_RUNNING) { 2234874aeea5SJeff Kirsher netif_info(efx, drv, efx->net_dev, 2235874aeea5SJeff Kirsher "scheduled reset quenched. NIC not RUNNING\n"); 2236874aeea5SJeff Kirsher return; 2237874aeea5SJeff Kirsher } 2238874aeea5SJeff Kirsher 2239874aeea5SJeff Kirsher rtnl_lock(); 2240874aeea5SJeff Kirsher (void)efx_reset(efx, fls(pending) - 1); 2241874aeea5SJeff Kirsher rtnl_unlock(); 2242874aeea5SJeff Kirsher } 2243874aeea5SJeff Kirsher 2244874aeea5SJeff Kirsher void efx_schedule_reset(struct efx_nic *efx, enum reset_type type) 2245874aeea5SJeff Kirsher { 2246874aeea5SJeff Kirsher enum reset_type method; 2247874aeea5SJeff Kirsher 2248874aeea5SJeff Kirsher switch (type) { 2249874aeea5SJeff Kirsher case RESET_TYPE_INVISIBLE: 2250874aeea5SJeff Kirsher case RESET_TYPE_ALL: 2251874aeea5SJeff Kirsher case RESET_TYPE_WORLD: 2252874aeea5SJeff Kirsher case RESET_TYPE_DISABLE: 2253874aeea5SJeff Kirsher method = type; 2254874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "scheduling %s reset\n", 2255874aeea5SJeff Kirsher RESET_TYPE(method)); 2256874aeea5SJeff Kirsher break; 2257874aeea5SJeff Kirsher default: 2258874aeea5SJeff Kirsher method = efx->type->map_reset_reason(type); 2259874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, 2260874aeea5SJeff Kirsher "scheduling %s reset for %s\n", 2261874aeea5SJeff Kirsher RESET_TYPE(method), RESET_TYPE(type)); 2262874aeea5SJeff Kirsher break; 2263874aeea5SJeff Kirsher } 2264874aeea5SJeff Kirsher 2265874aeea5SJeff Kirsher set_bit(method, &efx->reset_pending); 2266874aeea5SJeff Kirsher 2267874aeea5SJeff Kirsher /* efx_process_channel() will no longer read events once a 2268874aeea5SJeff Kirsher * reset is scheduled. So switch back to poll'd MCDI completions. */ 2269874aeea5SJeff Kirsher efx_mcdi_mode_poll(efx); 2270874aeea5SJeff Kirsher 2271874aeea5SJeff Kirsher queue_work(reset_workqueue, &efx->reset_work); 2272874aeea5SJeff Kirsher } 2273874aeea5SJeff Kirsher 2274874aeea5SJeff Kirsher /************************************************************************** 2275874aeea5SJeff Kirsher * 2276874aeea5SJeff Kirsher * List of NICs we support 2277874aeea5SJeff Kirsher * 2278874aeea5SJeff Kirsher **************************************************************************/ 2279874aeea5SJeff Kirsher 2280874aeea5SJeff Kirsher /* PCI device ID table */ 2281874aeea5SJeff Kirsher static DEFINE_PCI_DEVICE_TABLE(efx_pci_table) = { 22820e59e7e7SLinus Torvalds {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 22830e59e7e7SLinus Torvalds PCI_DEVICE_ID_SOLARFLARE_SFC4000A_0), 2284874aeea5SJeff Kirsher .driver_data = (unsigned long) &falcon_a1_nic_type}, 22850e59e7e7SLinus Torvalds {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 22860e59e7e7SLinus Torvalds PCI_DEVICE_ID_SOLARFLARE_SFC4000B), 2287874aeea5SJeff Kirsher .driver_data = (unsigned long) &falcon_b0_nic_type}, 2288547c474fSBen Hutchings {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0803), /* SFC9020 */ 2289874aeea5SJeff Kirsher .driver_data = (unsigned long) &siena_a0_nic_type}, 2290547c474fSBen Hutchings {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0813), /* SFL9021 */ 2291874aeea5SJeff Kirsher .driver_data = (unsigned long) &siena_a0_nic_type}, 2292874aeea5SJeff Kirsher {0} /* end of list */ 2293874aeea5SJeff Kirsher }; 2294874aeea5SJeff Kirsher 2295874aeea5SJeff Kirsher /************************************************************************** 2296874aeea5SJeff Kirsher * 2297874aeea5SJeff Kirsher * Dummy PHY/MAC operations 2298874aeea5SJeff Kirsher * 2299874aeea5SJeff Kirsher * Can be used for some unimplemented operations 2300874aeea5SJeff Kirsher * Needed so all function pointers are valid and do not have to be tested 2301874aeea5SJeff Kirsher * before use 2302874aeea5SJeff Kirsher * 2303874aeea5SJeff Kirsher **************************************************************************/ 2304874aeea5SJeff Kirsher int efx_port_dummy_op_int(struct efx_nic *efx) 2305874aeea5SJeff Kirsher { 2306874aeea5SJeff Kirsher return 0; 2307874aeea5SJeff Kirsher } 2308874aeea5SJeff Kirsher void efx_port_dummy_op_void(struct efx_nic *efx) {} 2309874aeea5SJeff Kirsher 2310874aeea5SJeff Kirsher static bool efx_port_dummy_op_poll(struct efx_nic *efx) 2311874aeea5SJeff Kirsher { 2312874aeea5SJeff Kirsher return false; 2313874aeea5SJeff Kirsher } 2314874aeea5SJeff Kirsher 2315874aeea5SJeff Kirsher static const struct efx_phy_operations efx_dummy_phy_operations = { 2316874aeea5SJeff Kirsher .init = efx_port_dummy_op_int, 2317874aeea5SJeff Kirsher .reconfigure = efx_port_dummy_op_int, 2318874aeea5SJeff Kirsher .poll = efx_port_dummy_op_poll, 2319874aeea5SJeff Kirsher .fini = efx_port_dummy_op_void, 2320874aeea5SJeff Kirsher }; 2321874aeea5SJeff Kirsher 2322874aeea5SJeff Kirsher /************************************************************************** 2323874aeea5SJeff Kirsher * 2324874aeea5SJeff Kirsher * Data housekeeping 2325874aeea5SJeff Kirsher * 2326874aeea5SJeff Kirsher **************************************************************************/ 2327874aeea5SJeff Kirsher 2328874aeea5SJeff Kirsher /* This zeroes out and then fills in the invariants in a struct 2329874aeea5SJeff Kirsher * efx_nic (including all sub-structures). 2330874aeea5SJeff Kirsher */ 2331874aeea5SJeff Kirsher static int efx_init_struct(struct efx_nic *efx, const struct efx_nic_type *type, 2332874aeea5SJeff Kirsher struct pci_dev *pci_dev, struct net_device *net_dev) 2333874aeea5SJeff Kirsher { 2334874aeea5SJeff Kirsher int i; 2335874aeea5SJeff Kirsher 2336874aeea5SJeff Kirsher /* Initialise common structures */ 2337874aeea5SJeff Kirsher memset(efx, 0, sizeof(*efx)); 2338874aeea5SJeff Kirsher spin_lock_init(&efx->biu_lock); 2339874aeea5SJeff Kirsher #ifdef CONFIG_SFC_MTD 2340874aeea5SJeff Kirsher INIT_LIST_HEAD(&efx->mtd_list); 2341874aeea5SJeff Kirsher #endif 2342874aeea5SJeff Kirsher INIT_WORK(&efx->reset_work, efx_reset_work); 2343874aeea5SJeff Kirsher INIT_DELAYED_WORK(&efx->monitor_work, efx_monitor); 2344874aeea5SJeff Kirsher efx->pci_dev = pci_dev; 2345874aeea5SJeff Kirsher efx->msg_enable = debug; 2346874aeea5SJeff Kirsher efx->state = STATE_INIT; 2347874aeea5SJeff Kirsher strlcpy(efx->name, pci_name(pci_dev), sizeof(efx->name)); 2348874aeea5SJeff Kirsher 2349874aeea5SJeff Kirsher efx->net_dev = net_dev; 2350874aeea5SJeff Kirsher spin_lock_init(&efx->stats_lock); 2351874aeea5SJeff Kirsher mutex_init(&efx->mac_lock); 2352874aeea5SJeff Kirsher efx->phy_op = &efx_dummy_phy_operations; 2353874aeea5SJeff Kirsher efx->mdio.dev = net_dev; 2354874aeea5SJeff Kirsher INIT_WORK(&efx->mac_work, efx_mac_work); 23559f2cb71cSBen Hutchings init_waitqueue_head(&efx->flush_wq); 2356874aeea5SJeff Kirsher 2357874aeea5SJeff Kirsher for (i = 0; i < EFX_MAX_CHANNELS; i++) { 2358874aeea5SJeff Kirsher efx->channel[i] = efx_alloc_channel(efx, i, NULL); 2359874aeea5SJeff Kirsher if (!efx->channel[i]) 2360874aeea5SJeff Kirsher goto fail; 2361874aeea5SJeff Kirsher } 2362874aeea5SJeff Kirsher 2363874aeea5SJeff Kirsher efx->type = type; 2364874aeea5SJeff Kirsher 2365874aeea5SJeff Kirsher EFX_BUG_ON_PARANOID(efx->type->phys_addr_channels > EFX_MAX_CHANNELS); 2366874aeea5SJeff Kirsher 2367874aeea5SJeff Kirsher /* Higher numbered interrupt modes are less capable! */ 2368874aeea5SJeff Kirsher efx->interrupt_mode = max(efx->type->max_interrupt_mode, 2369874aeea5SJeff Kirsher interrupt_mode); 2370874aeea5SJeff Kirsher 2371874aeea5SJeff Kirsher /* Would be good to use the net_dev name, but we're too early */ 2372874aeea5SJeff Kirsher snprintf(efx->workqueue_name, sizeof(efx->workqueue_name), "sfc%s", 2373874aeea5SJeff Kirsher pci_name(pci_dev)); 2374874aeea5SJeff Kirsher efx->workqueue = create_singlethread_workqueue(efx->workqueue_name); 2375874aeea5SJeff Kirsher if (!efx->workqueue) 2376874aeea5SJeff Kirsher goto fail; 2377874aeea5SJeff Kirsher 2378874aeea5SJeff Kirsher return 0; 2379874aeea5SJeff Kirsher 2380874aeea5SJeff Kirsher fail: 2381874aeea5SJeff Kirsher efx_fini_struct(efx); 2382874aeea5SJeff Kirsher return -ENOMEM; 2383874aeea5SJeff Kirsher } 2384874aeea5SJeff Kirsher 2385874aeea5SJeff Kirsher static void efx_fini_struct(struct efx_nic *efx) 2386874aeea5SJeff Kirsher { 2387874aeea5SJeff Kirsher int i; 2388874aeea5SJeff Kirsher 2389874aeea5SJeff Kirsher for (i = 0; i < EFX_MAX_CHANNELS; i++) 2390874aeea5SJeff Kirsher kfree(efx->channel[i]); 2391874aeea5SJeff Kirsher 2392874aeea5SJeff Kirsher if (efx->workqueue) { 2393874aeea5SJeff Kirsher destroy_workqueue(efx->workqueue); 2394874aeea5SJeff Kirsher efx->workqueue = NULL; 2395874aeea5SJeff Kirsher } 2396874aeea5SJeff Kirsher } 2397874aeea5SJeff Kirsher 2398874aeea5SJeff Kirsher /************************************************************************** 2399874aeea5SJeff Kirsher * 2400874aeea5SJeff Kirsher * PCI interface 2401874aeea5SJeff Kirsher * 2402874aeea5SJeff Kirsher **************************************************************************/ 2403874aeea5SJeff Kirsher 2404874aeea5SJeff Kirsher /* Main body of final NIC shutdown code 2405874aeea5SJeff Kirsher * This is called only at module unload (or hotplug removal). 2406874aeea5SJeff Kirsher */ 2407874aeea5SJeff Kirsher static void efx_pci_remove_main(struct efx_nic *efx) 2408874aeea5SJeff Kirsher { 2409874aeea5SJeff Kirsher #ifdef CONFIG_RFS_ACCEL 2410874aeea5SJeff Kirsher free_irq_cpu_rmap(efx->net_dev->rx_cpu_rmap); 2411874aeea5SJeff Kirsher efx->net_dev->rx_cpu_rmap = NULL; 2412874aeea5SJeff Kirsher #endif 24137f967c01SBen Hutchings efx_stop_interrupts(efx, false); 2414874aeea5SJeff Kirsher efx_nic_fini_interrupt(efx); 2415874aeea5SJeff Kirsher efx_fini_port(efx); 2416874aeea5SJeff Kirsher efx->type->fini(efx); 2417874aeea5SJeff Kirsher efx_fini_napi(efx); 2418874aeea5SJeff Kirsher efx_remove_all(efx); 2419874aeea5SJeff Kirsher } 2420874aeea5SJeff Kirsher 2421874aeea5SJeff Kirsher /* Final NIC shutdown 2422874aeea5SJeff Kirsher * This is called only at module unload (or hotplug removal). 2423874aeea5SJeff Kirsher */ 2424874aeea5SJeff Kirsher static void efx_pci_remove(struct pci_dev *pci_dev) 2425874aeea5SJeff Kirsher { 2426874aeea5SJeff Kirsher struct efx_nic *efx; 2427874aeea5SJeff Kirsher 2428874aeea5SJeff Kirsher efx = pci_get_drvdata(pci_dev); 2429874aeea5SJeff Kirsher if (!efx) 2430874aeea5SJeff Kirsher return; 2431874aeea5SJeff Kirsher 2432874aeea5SJeff Kirsher /* Mark the NIC as fini, then stop the interface */ 2433874aeea5SJeff Kirsher rtnl_lock(); 2434874aeea5SJeff Kirsher efx->state = STATE_FINI; 2435874aeea5SJeff Kirsher dev_close(efx->net_dev); 2436874aeea5SJeff Kirsher 2437874aeea5SJeff Kirsher /* Allow any queued efx_resets() to complete */ 2438874aeea5SJeff Kirsher rtnl_unlock(); 2439874aeea5SJeff Kirsher 24407f967c01SBen Hutchings efx_stop_interrupts(efx, false); 2441874aeea5SJeff Kirsher efx_unregister_netdev(efx); 2442874aeea5SJeff Kirsher 2443874aeea5SJeff Kirsher efx_mtd_remove(efx); 2444874aeea5SJeff Kirsher 2445874aeea5SJeff Kirsher /* Wait for any scheduled resets to complete. No more will be 2446874aeea5SJeff Kirsher * scheduled from this point because efx_stop_all() has been 2447874aeea5SJeff Kirsher * called, we are no longer registered with driverlink, and 2448874aeea5SJeff Kirsher * the net_device's have been removed. */ 2449874aeea5SJeff Kirsher cancel_work_sync(&efx->reset_work); 2450874aeea5SJeff Kirsher 2451874aeea5SJeff Kirsher efx_pci_remove_main(efx); 2452874aeea5SJeff Kirsher 2453874aeea5SJeff Kirsher efx_fini_io(efx); 2454874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "shutdown successful\n"); 2455874aeea5SJeff Kirsher 2456874aeea5SJeff Kirsher pci_set_drvdata(pci_dev, NULL); 2457874aeea5SJeff Kirsher efx_fini_struct(efx); 2458874aeea5SJeff Kirsher free_netdev(efx->net_dev); 2459874aeea5SJeff Kirsher }; 2460874aeea5SJeff Kirsher 2461874aeea5SJeff Kirsher /* Main body of NIC initialisation 2462874aeea5SJeff Kirsher * This is called at module load (or hotplug insertion, theoretically). 2463874aeea5SJeff Kirsher */ 2464874aeea5SJeff Kirsher static int efx_pci_probe_main(struct efx_nic *efx) 2465874aeea5SJeff Kirsher { 2466874aeea5SJeff Kirsher int rc; 2467874aeea5SJeff Kirsher 2468874aeea5SJeff Kirsher /* Do start-of-day initialisation */ 2469874aeea5SJeff Kirsher rc = efx_probe_all(efx); 2470874aeea5SJeff Kirsher if (rc) 2471874aeea5SJeff Kirsher goto fail1; 2472874aeea5SJeff Kirsher 2473874aeea5SJeff Kirsher efx_init_napi(efx); 2474874aeea5SJeff Kirsher 2475874aeea5SJeff Kirsher rc = efx->type->init(efx); 2476874aeea5SJeff Kirsher if (rc) { 2477874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 2478874aeea5SJeff Kirsher "failed to initialise NIC\n"); 2479874aeea5SJeff Kirsher goto fail3; 2480874aeea5SJeff Kirsher } 2481874aeea5SJeff Kirsher 2482874aeea5SJeff Kirsher rc = efx_init_port(efx); 2483874aeea5SJeff Kirsher if (rc) { 2484874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 2485874aeea5SJeff Kirsher "failed to initialise port\n"); 2486874aeea5SJeff Kirsher goto fail4; 2487874aeea5SJeff Kirsher } 2488874aeea5SJeff Kirsher 2489874aeea5SJeff Kirsher rc = efx_nic_init_interrupt(efx); 2490874aeea5SJeff Kirsher if (rc) 2491874aeea5SJeff Kirsher goto fail5; 24927f967c01SBen Hutchings efx_start_interrupts(efx, false); 2493874aeea5SJeff Kirsher 2494874aeea5SJeff Kirsher return 0; 2495874aeea5SJeff Kirsher 2496874aeea5SJeff Kirsher fail5: 2497874aeea5SJeff Kirsher efx_fini_port(efx); 2498874aeea5SJeff Kirsher fail4: 2499874aeea5SJeff Kirsher efx->type->fini(efx); 2500874aeea5SJeff Kirsher fail3: 2501874aeea5SJeff Kirsher efx_fini_napi(efx); 2502874aeea5SJeff Kirsher efx_remove_all(efx); 2503874aeea5SJeff Kirsher fail1: 2504874aeea5SJeff Kirsher return rc; 2505874aeea5SJeff Kirsher } 2506874aeea5SJeff Kirsher 2507874aeea5SJeff Kirsher /* NIC initialisation 2508874aeea5SJeff Kirsher * 2509874aeea5SJeff Kirsher * This is called at module load (or hotplug insertion, 251073ba7b68SBen Hutchings * theoretically). It sets up PCI mappings, resets the NIC, 2511874aeea5SJeff Kirsher * sets up and registers the network devices with the kernel and hooks 2512874aeea5SJeff Kirsher * the interrupt service routine. It does not prepare the device for 2513874aeea5SJeff Kirsher * transmission; this is left to the first time one of the network 2514874aeea5SJeff Kirsher * interfaces is brought up (i.e. efx_net_open). 2515874aeea5SJeff Kirsher */ 2516874aeea5SJeff Kirsher static int __devinit efx_pci_probe(struct pci_dev *pci_dev, 2517874aeea5SJeff Kirsher const struct pci_device_id *entry) 2518874aeea5SJeff Kirsher { 2519874aeea5SJeff Kirsher const struct efx_nic_type *type = (const struct efx_nic_type *) entry->driver_data; 2520874aeea5SJeff Kirsher struct net_device *net_dev; 2521874aeea5SJeff Kirsher struct efx_nic *efx; 2522fadac6aaSBen Hutchings int rc; 2523874aeea5SJeff Kirsher 2524874aeea5SJeff Kirsher /* Allocate and initialise a struct net_device and struct efx_nic */ 2525874aeea5SJeff Kirsher net_dev = alloc_etherdev_mqs(sizeof(*efx), EFX_MAX_CORE_TX_QUEUES, 2526874aeea5SJeff Kirsher EFX_MAX_RX_QUEUES); 2527874aeea5SJeff Kirsher if (!net_dev) 2528874aeea5SJeff Kirsher return -ENOMEM; 2529874aeea5SJeff Kirsher net_dev->features |= (type->offload_features | NETIF_F_SG | 2530874aeea5SJeff Kirsher NETIF_F_HIGHDMA | NETIF_F_TSO | 2531874aeea5SJeff Kirsher NETIF_F_RXCSUM); 2532874aeea5SJeff Kirsher if (type->offload_features & NETIF_F_V6_CSUM) 2533874aeea5SJeff Kirsher net_dev->features |= NETIF_F_TSO6; 2534874aeea5SJeff Kirsher /* Mask for features that also apply to VLAN devices */ 2535874aeea5SJeff Kirsher net_dev->vlan_features |= (NETIF_F_ALL_CSUM | NETIF_F_SG | 2536874aeea5SJeff Kirsher NETIF_F_HIGHDMA | NETIF_F_ALL_TSO | 2537874aeea5SJeff Kirsher NETIF_F_RXCSUM); 2538874aeea5SJeff Kirsher /* All offloads can be toggled */ 2539874aeea5SJeff Kirsher net_dev->hw_features = net_dev->features & ~NETIF_F_HIGHDMA; 2540874aeea5SJeff Kirsher efx = netdev_priv(net_dev); 2541874aeea5SJeff Kirsher pci_set_drvdata(pci_dev, efx); 2542874aeea5SJeff Kirsher SET_NETDEV_DEV(net_dev, &pci_dev->dev); 2543874aeea5SJeff Kirsher rc = efx_init_struct(efx, type, pci_dev, net_dev); 2544874aeea5SJeff Kirsher if (rc) 2545874aeea5SJeff Kirsher goto fail1; 2546874aeea5SJeff Kirsher 2547874aeea5SJeff Kirsher netif_info(efx, probe, efx->net_dev, 2548874aeea5SJeff Kirsher "Solarflare NIC detected\n"); 2549874aeea5SJeff Kirsher 2550874aeea5SJeff Kirsher /* Set up basic I/O (BAR mappings etc) */ 2551874aeea5SJeff Kirsher rc = efx_init_io(efx); 2552874aeea5SJeff Kirsher if (rc) 2553874aeea5SJeff Kirsher goto fail2; 2554874aeea5SJeff Kirsher 2555874aeea5SJeff Kirsher rc = efx_pci_probe_main(efx); 2556874aeea5SJeff Kirsher 2557874aeea5SJeff Kirsher /* Serialise against efx_reset(). No more resets will be 2558fadac6aaSBen Hutchings * scheduled since efx_stop_all() has been called, and we have 2559fadac6aaSBen Hutchings * not and never have been registered. 2560fadac6aaSBen Hutchings */ 2561874aeea5SJeff Kirsher cancel_work_sync(&efx->reset_work); 2562874aeea5SJeff Kirsher 2563fadac6aaSBen Hutchings if (rc) 2564874aeea5SJeff Kirsher goto fail3; 2565874aeea5SJeff Kirsher 2566fadac6aaSBen Hutchings /* If there was a scheduled reset during probe, the NIC is 2567fadac6aaSBen Hutchings * probably hosed anyway. 2568fadac6aaSBen Hutchings */ 2569fadac6aaSBen Hutchings if (efx->reset_pending) { 2570fadac6aaSBen Hutchings rc = -EIO; 2571874aeea5SJeff Kirsher goto fail4; 2572874aeea5SJeff Kirsher } 2573874aeea5SJeff Kirsher 2574874aeea5SJeff Kirsher /* Switch to the running state before we expose the device to the OS, 2575874aeea5SJeff Kirsher * so that dev_open()|efx_start_all() will actually start the device */ 2576874aeea5SJeff Kirsher efx->state = STATE_RUNNING; 2577874aeea5SJeff Kirsher 2578874aeea5SJeff Kirsher rc = efx_register_netdev(efx); 2579874aeea5SJeff Kirsher if (rc) 2580fadac6aaSBen Hutchings goto fail4; 2581874aeea5SJeff Kirsher 2582874aeea5SJeff Kirsher netif_dbg(efx, probe, efx->net_dev, "initialisation successful\n"); 2583874aeea5SJeff Kirsher 25847c43161cSBen Hutchings /* Try to create MTDs, but allow this to fail */ 2585874aeea5SJeff Kirsher rtnl_lock(); 25867c43161cSBen Hutchings rc = efx_mtd_probe(efx); 2587874aeea5SJeff Kirsher rtnl_unlock(); 25887c43161cSBen Hutchings if (rc) 25897c43161cSBen Hutchings netif_warn(efx, probe, efx->net_dev, 25907c43161cSBen Hutchings "failed to create MTDs (%d)\n", rc); 25917c43161cSBen Hutchings 2592874aeea5SJeff Kirsher return 0; 2593874aeea5SJeff Kirsher 2594874aeea5SJeff Kirsher fail4: 2595fadac6aaSBen Hutchings efx_pci_remove_main(efx); 2596874aeea5SJeff Kirsher fail3: 2597874aeea5SJeff Kirsher efx_fini_io(efx); 2598874aeea5SJeff Kirsher fail2: 2599874aeea5SJeff Kirsher efx_fini_struct(efx); 2600874aeea5SJeff Kirsher fail1: 2601874aeea5SJeff Kirsher WARN_ON(rc > 0); 2602874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "initialisation failed. rc=%d\n", rc); 2603874aeea5SJeff Kirsher free_netdev(net_dev); 2604874aeea5SJeff Kirsher return rc; 2605874aeea5SJeff Kirsher } 2606874aeea5SJeff Kirsher 2607874aeea5SJeff Kirsher static int efx_pm_freeze(struct device *dev) 2608874aeea5SJeff Kirsher { 2609874aeea5SJeff Kirsher struct efx_nic *efx = pci_get_drvdata(to_pci_dev(dev)); 2610874aeea5SJeff Kirsher 2611874aeea5SJeff Kirsher efx->state = STATE_FINI; 2612874aeea5SJeff Kirsher 2613874aeea5SJeff Kirsher netif_device_detach(efx->net_dev); 2614874aeea5SJeff Kirsher 2615874aeea5SJeff Kirsher efx_stop_all(efx); 26167f967c01SBen Hutchings efx_stop_interrupts(efx, false); 2617874aeea5SJeff Kirsher 2618874aeea5SJeff Kirsher return 0; 2619874aeea5SJeff Kirsher } 2620874aeea5SJeff Kirsher 2621874aeea5SJeff Kirsher static int efx_pm_thaw(struct device *dev) 2622874aeea5SJeff Kirsher { 2623874aeea5SJeff Kirsher struct efx_nic *efx = pci_get_drvdata(to_pci_dev(dev)); 2624874aeea5SJeff Kirsher 2625874aeea5SJeff Kirsher efx->state = STATE_INIT; 2626874aeea5SJeff Kirsher 26277f967c01SBen Hutchings efx_start_interrupts(efx, false); 2628874aeea5SJeff Kirsher 2629874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 2630874aeea5SJeff Kirsher efx->phy_op->reconfigure(efx); 2631874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 2632874aeea5SJeff Kirsher 2633874aeea5SJeff Kirsher efx_start_all(efx); 2634874aeea5SJeff Kirsher 2635874aeea5SJeff Kirsher netif_device_attach(efx->net_dev); 2636874aeea5SJeff Kirsher 2637874aeea5SJeff Kirsher efx->state = STATE_RUNNING; 2638874aeea5SJeff Kirsher 2639874aeea5SJeff Kirsher efx->type->resume_wol(efx); 2640874aeea5SJeff Kirsher 2641874aeea5SJeff Kirsher /* Reschedule any quenched resets scheduled during efx_pm_freeze() */ 2642874aeea5SJeff Kirsher queue_work(reset_workqueue, &efx->reset_work); 2643874aeea5SJeff Kirsher 2644874aeea5SJeff Kirsher return 0; 2645874aeea5SJeff Kirsher } 2646874aeea5SJeff Kirsher 2647874aeea5SJeff Kirsher static int efx_pm_poweroff(struct device *dev) 2648874aeea5SJeff Kirsher { 2649874aeea5SJeff Kirsher struct pci_dev *pci_dev = to_pci_dev(dev); 2650874aeea5SJeff Kirsher struct efx_nic *efx = pci_get_drvdata(pci_dev); 2651874aeea5SJeff Kirsher 2652874aeea5SJeff Kirsher efx->type->fini(efx); 2653874aeea5SJeff Kirsher 2654874aeea5SJeff Kirsher efx->reset_pending = 0; 2655874aeea5SJeff Kirsher 2656874aeea5SJeff Kirsher pci_save_state(pci_dev); 2657874aeea5SJeff Kirsher return pci_set_power_state(pci_dev, PCI_D3hot); 2658874aeea5SJeff Kirsher } 2659874aeea5SJeff Kirsher 2660874aeea5SJeff Kirsher /* Used for both resume and restore */ 2661874aeea5SJeff Kirsher static int efx_pm_resume(struct device *dev) 2662874aeea5SJeff Kirsher { 2663874aeea5SJeff Kirsher struct pci_dev *pci_dev = to_pci_dev(dev); 2664874aeea5SJeff Kirsher struct efx_nic *efx = pci_get_drvdata(pci_dev); 2665874aeea5SJeff Kirsher int rc; 2666874aeea5SJeff Kirsher 2667874aeea5SJeff Kirsher rc = pci_set_power_state(pci_dev, PCI_D0); 2668874aeea5SJeff Kirsher if (rc) 2669874aeea5SJeff Kirsher return rc; 2670874aeea5SJeff Kirsher pci_restore_state(pci_dev); 2671874aeea5SJeff Kirsher rc = pci_enable_device(pci_dev); 2672874aeea5SJeff Kirsher if (rc) 2673874aeea5SJeff Kirsher return rc; 2674874aeea5SJeff Kirsher pci_set_master(efx->pci_dev); 2675874aeea5SJeff Kirsher rc = efx->type->reset(efx, RESET_TYPE_ALL); 2676874aeea5SJeff Kirsher if (rc) 2677874aeea5SJeff Kirsher return rc; 2678874aeea5SJeff Kirsher rc = efx->type->init(efx); 2679874aeea5SJeff Kirsher if (rc) 2680874aeea5SJeff Kirsher return rc; 2681874aeea5SJeff Kirsher efx_pm_thaw(dev); 2682874aeea5SJeff Kirsher return 0; 2683874aeea5SJeff Kirsher } 2684874aeea5SJeff Kirsher 2685874aeea5SJeff Kirsher static int efx_pm_suspend(struct device *dev) 2686874aeea5SJeff Kirsher { 2687874aeea5SJeff Kirsher int rc; 2688874aeea5SJeff Kirsher 2689874aeea5SJeff Kirsher efx_pm_freeze(dev); 2690874aeea5SJeff Kirsher rc = efx_pm_poweroff(dev); 2691874aeea5SJeff Kirsher if (rc) 2692874aeea5SJeff Kirsher efx_pm_resume(dev); 2693874aeea5SJeff Kirsher return rc; 2694874aeea5SJeff Kirsher } 2695874aeea5SJeff Kirsher 269618e83e4cSBen Hutchings static const struct dev_pm_ops efx_pm_ops = { 2697874aeea5SJeff Kirsher .suspend = efx_pm_suspend, 2698874aeea5SJeff Kirsher .resume = efx_pm_resume, 2699874aeea5SJeff Kirsher .freeze = efx_pm_freeze, 2700874aeea5SJeff Kirsher .thaw = efx_pm_thaw, 2701874aeea5SJeff Kirsher .poweroff = efx_pm_poweroff, 2702874aeea5SJeff Kirsher .restore = efx_pm_resume, 2703874aeea5SJeff Kirsher }; 2704874aeea5SJeff Kirsher 2705874aeea5SJeff Kirsher static struct pci_driver efx_pci_driver = { 2706874aeea5SJeff Kirsher .name = KBUILD_MODNAME, 2707874aeea5SJeff Kirsher .id_table = efx_pci_table, 2708874aeea5SJeff Kirsher .probe = efx_pci_probe, 2709874aeea5SJeff Kirsher .remove = efx_pci_remove, 2710874aeea5SJeff Kirsher .driver.pm = &efx_pm_ops, 2711874aeea5SJeff Kirsher }; 2712874aeea5SJeff Kirsher 2713874aeea5SJeff Kirsher /************************************************************************** 2714874aeea5SJeff Kirsher * 2715874aeea5SJeff Kirsher * Kernel module interface 2716874aeea5SJeff Kirsher * 2717874aeea5SJeff Kirsher *************************************************************************/ 2718874aeea5SJeff Kirsher 2719874aeea5SJeff Kirsher module_param(interrupt_mode, uint, 0444); 2720874aeea5SJeff Kirsher MODULE_PARM_DESC(interrupt_mode, 2721874aeea5SJeff Kirsher "Interrupt mode (0=>MSIX 1=>MSI 2=>legacy)"); 2722874aeea5SJeff Kirsher 2723874aeea5SJeff Kirsher static int __init efx_init_module(void) 2724874aeea5SJeff Kirsher { 2725874aeea5SJeff Kirsher int rc; 2726874aeea5SJeff Kirsher 2727874aeea5SJeff Kirsher printk(KERN_INFO "Solarflare NET driver v" EFX_DRIVER_VERSION "\n"); 2728874aeea5SJeff Kirsher 2729874aeea5SJeff Kirsher rc = register_netdevice_notifier(&efx_netdev_notifier); 2730874aeea5SJeff Kirsher if (rc) 2731874aeea5SJeff Kirsher goto err_notifier; 2732874aeea5SJeff Kirsher 2733874aeea5SJeff Kirsher reset_workqueue = create_singlethread_workqueue("sfc_reset"); 2734874aeea5SJeff Kirsher if (!reset_workqueue) { 2735874aeea5SJeff Kirsher rc = -ENOMEM; 2736874aeea5SJeff Kirsher goto err_reset; 2737874aeea5SJeff Kirsher } 2738874aeea5SJeff Kirsher 2739874aeea5SJeff Kirsher rc = pci_register_driver(&efx_pci_driver); 2740874aeea5SJeff Kirsher if (rc < 0) 2741874aeea5SJeff Kirsher goto err_pci; 2742874aeea5SJeff Kirsher 2743874aeea5SJeff Kirsher return 0; 2744874aeea5SJeff Kirsher 2745874aeea5SJeff Kirsher err_pci: 2746874aeea5SJeff Kirsher destroy_workqueue(reset_workqueue); 2747874aeea5SJeff Kirsher err_reset: 2748874aeea5SJeff Kirsher unregister_netdevice_notifier(&efx_netdev_notifier); 2749874aeea5SJeff Kirsher err_notifier: 2750874aeea5SJeff Kirsher return rc; 2751874aeea5SJeff Kirsher } 2752874aeea5SJeff Kirsher 2753874aeea5SJeff Kirsher static void __exit efx_exit_module(void) 2754874aeea5SJeff Kirsher { 2755874aeea5SJeff Kirsher printk(KERN_INFO "Solarflare NET driver unloading\n"); 2756874aeea5SJeff Kirsher 2757874aeea5SJeff Kirsher pci_unregister_driver(&efx_pci_driver); 2758874aeea5SJeff Kirsher destroy_workqueue(reset_workqueue); 2759874aeea5SJeff Kirsher unregister_netdevice_notifier(&efx_netdev_notifier); 2760874aeea5SJeff Kirsher 2761874aeea5SJeff Kirsher } 2762874aeea5SJeff Kirsher 2763874aeea5SJeff Kirsher module_init(efx_init_module); 2764874aeea5SJeff Kirsher module_exit(efx_exit_module); 2765874aeea5SJeff Kirsher 2766874aeea5SJeff Kirsher MODULE_AUTHOR("Solarflare Communications and " 2767874aeea5SJeff Kirsher "Michael Brown <mbrown@fensystems.co.uk>"); 2768874aeea5SJeff Kirsher MODULE_DESCRIPTION("Solarflare Communications network driver"); 2769874aeea5SJeff Kirsher MODULE_LICENSE("GPL"); 2770874aeea5SJeff Kirsher MODULE_DEVICE_TABLE(pci, efx_pci_table); 2771