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" 28dd40781eSBen Hutchings #include "selftest.h" 29874aeea5SJeff Kirsher 30874aeea5SJeff Kirsher #include "mcdi.h" 31874aeea5SJeff Kirsher #include "workarounds.h" 32874aeea5SJeff Kirsher 33874aeea5SJeff Kirsher /************************************************************************** 34874aeea5SJeff Kirsher * 35874aeea5SJeff Kirsher * Type name strings 36874aeea5SJeff Kirsher * 37874aeea5SJeff Kirsher ************************************************************************** 38874aeea5SJeff Kirsher */ 39874aeea5SJeff Kirsher 40874aeea5SJeff Kirsher /* Loopback mode names (see LOOPBACK_MODE()) */ 41874aeea5SJeff Kirsher const unsigned int efx_loopback_mode_max = LOOPBACK_MAX; 4218e83e4cSBen Hutchings const char *const efx_loopback_mode_names[] = { 43874aeea5SJeff Kirsher [LOOPBACK_NONE] = "NONE", 44874aeea5SJeff Kirsher [LOOPBACK_DATA] = "DATAPATH", 45874aeea5SJeff Kirsher [LOOPBACK_GMAC] = "GMAC", 46874aeea5SJeff Kirsher [LOOPBACK_XGMII] = "XGMII", 47874aeea5SJeff Kirsher [LOOPBACK_XGXS] = "XGXS", 48874aeea5SJeff Kirsher [LOOPBACK_XAUI] = "XAUI", 49874aeea5SJeff Kirsher [LOOPBACK_GMII] = "GMII", 50874aeea5SJeff Kirsher [LOOPBACK_SGMII] = "SGMII", 51874aeea5SJeff Kirsher [LOOPBACK_XGBR] = "XGBR", 52874aeea5SJeff Kirsher [LOOPBACK_XFI] = "XFI", 53874aeea5SJeff Kirsher [LOOPBACK_XAUI_FAR] = "XAUI_FAR", 54874aeea5SJeff Kirsher [LOOPBACK_GMII_FAR] = "GMII_FAR", 55874aeea5SJeff Kirsher [LOOPBACK_SGMII_FAR] = "SGMII_FAR", 56874aeea5SJeff Kirsher [LOOPBACK_XFI_FAR] = "XFI_FAR", 57874aeea5SJeff Kirsher [LOOPBACK_GPHY] = "GPHY", 58874aeea5SJeff Kirsher [LOOPBACK_PHYXS] = "PHYXS", 59874aeea5SJeff Kirsher [LOOPBACK_PCS] = "PCS", 60874aeea5SJeff Kirsher [LOOPBACK_PMAPMD] = "PMA/PMD", 61874aeea5SJeff Kirsher [LOOPBACK_XPORT] = "XPORT", 62874aeea5SJeff Kirsher [LOOPBACK_XGMII_WS] = "XGMII_WS", 63874aeea5SJeff Kirsher [LOOPBACK_XAUI_WS] = "XAUI_WS", 64874aeea5SJeff Kirsher [LOOPBACK_XAUI_WS_FAR] = "XAUI_WS_FAR", 65874aeea5SJeff Kirsher [LOOPBACK_XAUI_WS_NEAR] = "XAUI_WS_NEAR", 66874aeea5SJeff Kirsher [LOOPBACK_GMII_WS] = "GMII_WS", 67874aeea5SJeff Kirsher [LOOPBACK_XFI_WS] = "XFI_WS", 68874aeea5SJeff Kirsher [LOOPBACK_XFI_WS_FAR] = "XFI_WS_FAR", 69874aeea5SJeff Kirsher [LOOPBACK_PHYXS_WS] = "PHYXS_WS", 70874aeea5SJeff Kirsher }; 71874aeea5SJeff Kirsher 72874aeea5SJeff Kirsher const unsigned int efx_reset_type_max = RESET_TYPE_MAX; 7318e83e4cSBen Hutchings const char *const efx_reset_type_names[] = { 74874aeea5SJeff Kirsher [RESET_TYPE_INVISIBLE] = "INVISIBLE", 75874aeea5SJeff Kirsher [RESET_TYPE_ALL] = "ALL", 76874aeea5SJeff Kirsher [RESET_TYPE_WORLD] = "WORLD", 77874aeea5SJeff Kirsher [RESET_TYPE_DISABLE] = "DISABLE", 78874aeea5SJeff Kirsher [RESET_TYPE_TX_WATCHDOG] = "TX_WATCHDOG", 79874aeea5SJeff Kirsher [RESET_TYPE_INT_ERROR] = "INT_ERROR", 80874aeea5SJeff Kirsher [RESET_TYPE_RX_RECOVERY] = "RX_RECOVERY", 81874aeea5SJeff Kirsher [RESET_TYPE_RX_DESC_FETCH] = "RX_DESC_FETCH", 82874aeea5SJeff Kirsher [RESET_TYPE_TX_DESC_FETCH] = "TX_DESC_FETCH", 83874aeea5SJeff Kirsher [RESET_TYPE_TX_SKIP] = "TX_SKIP", 84874aeea5SJeff Kirsher [RESET_TYPE_MC_FAILURE] = "MC_FAILURE", 85874aeea5SJeff Kirsher }; 86874aeea5SJeff Kirsher 87874aeea5SJeff Kirsher #define EFX_MAX_MTU (9 * 1024) 88874aeea5SJeff Kirsher 89874aeea5SJeff Kirsher /* Reset workqueue. If any NIC has a hardware failure then a reset will be 90874aeea5SJeff Kirsher * queued onto this work queue. This is not a per-nic work queue, because 91874aeea5SJeff Kirsher * efx_reset_work() acquires the rtnl lock, so resets are naturally serialised. 92874aeea5SJeff Kirsher */ 93874aeea5SJeff Kirsher static struct workqueue_struct *reset_workqueue; 94874aeea5SJeff Kirsher 95874aeea5SJeff Kirsher /************************************************************************** 96874aeea5SJeff Kirsher * 97874aeea5SJeff Kirsher * Configurable values 98874aeea5SJeff Kirsher * 99874aeea5SJeff Kirsher *************************************************************************/ 100874aeea5SJeff Kirsher 101874aeea5SJeff Kirsher /* 102874aeea5SJeff Kirsher * Use separate channels for TX and RX events 103874aeea5SJeff Kirsher * 104874aeea5SJeff Kirsher * Set this to 1 to use separate channels for TX and RX. It allows us 105874aeea5SJeff Kirsher * to control interrupt affinity separately for TX and RX. 106874aeea5SJeff Kirsher * 107874aeea5SJeff Kirsher * This is only used in MSI-X interrupt mode 108874aeea5SJeff Kirsher */ 109874aeea5SJeff Kirsher static unsigned int separate_tx_channels; 110874aeea5SJeff Kirsher module_param(separate_tx_channels, uint, 0444); 111874aeea5SJeff Kirsher MODULE_PARM_DESC(separate_tx_channels, 112874aeea5SJeff Kirsher "Use separate channels for TX and RX"); 113874aeea5SJeff Kirsher 114874aeea5SJeff Kirsher /* This is the weight assigned to each of the (per-channel) virtual 115874aeea5SJeff Kirsher * NAPI devices. 116874aeea5SJeff Kirsher */ 117874aeea5SJeff Kirsher static int napi_weight = 64; 118874aeea5SJeff Kirsher 119874aeea5SJeff Kirsher /* This is the time (in jiffies) between invocations of the hardware 120874aeea5SJeff Kirsher * monitor. On Falcon-based NICs, this will: 121874aeea5SJeff Kirsher * - Check the on-board hardware monitor; 122874aeea5SJeff Kirsher * - Poll the link state and reconfigure the hardware as necessary. 123874aeea5SJeff Kirsher */ 124874aeea5SJeff Kirsher static unsigned int efx_monitor_interval = 1 * HZ; 125874aeea5SJeff Kirsher 126874aeea5SJeff Kirsher /* Initial interrupt moderation settings. They can be modified after 127874aeea5SJeff Kirsher * module load with ethtool. 128874aeea5SJeff Kirsher * 129874aeea5SJeff Kirsher * The default for RX should strike a balance between increasing the 130874aeea5SJeff Kirsher * round-trip latency and reducing overhead. 131874aeea5SJeff Kirsher */ 132874aeea5SJeff Kirsher static unsigned int rx_irq_mod_usec = 60; 133874aeea5SJeff Kirsher 134874aeea5SJeff Kirsher /* Initial interrupt moderation settings. They can be modified after 135874aeea5SJeff Kirsher * module load with ethtool. 136874aeea5SJeff Kirsher * 137874aeea5SJeff Kirsher * This default is chosen to ensure that a 10G link does not go idle 138874aeea5SJeff Kirsher * while a TX queue is stopped after it has become full. A queue is 139874aeea5SJeff Kirsher * restarted when it drops below half full. The time this takes (assuming 140874aeea5SJeff Kirsher * worst case 3 descriptors per packet and 1024 descriptors) is 141874aeea5SJeff Kirsher * 512 / 3 * 1.2 = 205 usec. 142874aeea5SJeff Kirsher */ 143874aeea5SJeff Kirsher static unsigned int tx_irq_mod_usec = 150; 144874aeea5SJeff Kirsher 145874aeea5SJeff Kirsher /* This is the first interrupt mode to try out of: 146874aeea5SJeff Kirsher * 0 => MSI-X 147874aeea5SJeff Kirsher * 1 => MSI 148874aeea5SJeff Kirsher * 2 => legacy 149874aeea5SJeff Kirsher */ 150874aeea5SJeff Kirsher static unsigned int interrupt_mode; 151874aeea5SJeff Kirsher 152874aeea5SJeff Kirsher /* This is the requested number of CPUs to use for Receive-Side Scaling (RSS), 153874aeea5SJeff Kirsher * i.e. the number of CPUs among which we may distribute simultaneous 154874aeea5SJeff Kirsher * interrupt handling. 155874aeea5SJeff Kirsher * 156874aeea5SJeff Kirsher * Cards without MSI-X will only target one CPU via legacy or MSI interrupt. 157cdb08f8fSBen Hutchings * The default (0) means to assign an interrupt to each core. 158874aeea5SJeff Kirsher */ 159874aeea5SJeff Kirsher static unsigned int rss_cpus; 160874aeea5SJeff Kirsher module_param(rss_cpus, uint, 0444); 161874aeea5SJeff Kirsher MODULE_PARM_DESC(rss_cpus, "Number of CPUs to use for Receive-Side Scaling"); 162874aeea5SJeff Kirsher 163874aeea5SJeff Kirsher static int phy_flash_cfg; 164874aeea5SJeff Kirsher module_param(phy_flash_cfg, int, 0644); 165874aeea5SJeff Kirsher MODULE_PARM_DESC(phy_flash_cfg, "Set PHYs into reflash mode initially"); 166874aeea5SJeff Kirsher 167e7bed9c8SBen Hutchings static unsigned irq_adapt_low_thresh = 8000; 168874aeea5SJeff Kirsher module_param(irq_adapt_low_thresh, uint, 0644); 169874aeea5SJeff Kirsher MODULE_PARM_DESC(irq_adapt_low_thresh, 170874aeea5SJeff Kirsher "Threshold score for reducing IRQ moderation"); 171874aeea5SJeff Kirsher 172e7bed9c8SBen Hutchings static unsigned irq_adapt_high_thresh = 16000; 173874aeea5SJeff Kirsher module_param(irq_adapt_high_thresh, uint, 0644); 174874aeea5SJeff Kirsher MODULE_PARM_DESC(irq_adapt_high_thresh, 175874aeea5SJeff Kirsher "Threshold score for increasing IRQ moderation"); 176874aeea5SJeff Kirsher 177874aeea5SJeff Kirsher static unsigned debug = (NETIF_MSG_DRV | NETIF_MSG_PROBE | 178874aeea5SJeff Kirsher NETIF_MSG_LINK | NETIF_MSG_IFDOWN | 179874aeea5SJeff Kirsher NETIF_MSG_IFUP | NETIF_MSG_RX_ERR | 180874aeea5SJeff Kirsher NETIF_MSG_TX_ERR | NETIF_MSG_HW); 181874aeea5SJeff Kirsher module_param(debug, uint, 0); 182874aeea5SJeff Kirsher MODULE_PARM_DESC(debug, "Bitmapped debugging message enable value"); 183874aeea5SJeff Kirsher 184874aeea5SJeff Kirsher /************************************************************************** 185874aeea5SJeff Kirsher * 186874aeea5SJeff Kirsher * Utility functions and prototypes 187874aeea5SJeff Kirsher * 188874aeea5SJeff Kirsher *************************************************************************/ 189874aeea5SJeff Kirsher 1907f967c01SBen Hutchings static void efx_start_interrupts(struct efx_nic *efx, bool may_keep_eventq); 1917f967c01SBen Hutchings static void efx_stop_interrupts(struct efx_nic *efx, bool may_keep_eventq); 1927f967c01SBen Hutchings static void efx_remove_channel(struct efx_channel *channel); 193874aeea5SJeff Kirsher static void efx_remove_channels(struct efx_nic *efx); 1947f967c01SBen Hutchings static const struct efx_channel_type efx_default_channel_type; 195874aeea5SJeff Kirsher static void efx_remove_port(struct efx_nic *efx); 1967f967c01SBen Hutchings static void efx_init_napi_channel(struct efx_channel *channel); 197874aeea5SJeff Kirsher static void efx_fini_napi(struct efx_nic *efx); 198874aeea5SJeff Kirsher static void efx_fini_napi_channel(struct efx_channel *channel); 199874aeea5SJeff Kirsher static void efx_fini_struct(struct efx_nic *efx); 200874aeea5SJeff Kirsher static void efx_start_all(struct efx_nic *efx); 201874aeea5SJeff Kirsher static void efx_stop_all(struct efx_nic *efx); 202874aeea5SJeff Kirsher 203874aeea5SJeff Kirsher #define EFX_ASSERT_RESET_SERIALISED(efx) \ 204874aeea5SJeff Kirsher do { \ 205874aeea5SJeff Kirsher if ((efx->state == STATE_RUNNING) || \ 206874aeea5SJeff Kirsher (efx->state == STATE_DISABLED)) \ 207874aeea5SJeff Kirsher ASSERT_RTNL(); \ 208874aeea5SJeff Kirsher } while (0) 209874aeea5SJeff Kirsher 210874aeea5SJeff Kirsher /************************************************************************** 211874aeea5SJeff Kirsher * 212874aeea5SJeff Kirsher * Event queue processing 213874aeea5SJeff Kirsher * 214874aeea5SJeff Kirsher *************************************************************************/ 215874aeea5SJeff Kirsher 216874aeea5SJeff Kirsher /* Process channel's event queue 217874aeea5SJeff Kirsher * 218874aeea5SJeff Kirsher * This function is responsible for processing the event queue of a 219874aeea5SJeff Kirsher * single channel. The caller must guarantee that this function will 220874aeea5SJeff Kirsher * never be concurrently called more than once on the same channel, 221874aeea5SJeff Kirsher * though different channels may be being processed concurrently. 222874aeea5SJeff Kirsher */ 223874aeea5SJeff Kirsher static int efx_process_channel(struct efx_channel *channel, int budget) 224874aeea5SJeff Kirsher { 225874aeea5SJeff Kirsher int spent; 226874aeea5SJeff Kirsher 2279f2cb71cSBen Hutchings if (unlikely(!channel->enabled)) 228874aeea5SJeff Kirsher return 0; 229874aeea5SJeff Kirsher 230874aeea5SJeff Kirsher spent = efx_nic_process_eventq(channel, budget); 231d9ab7007SBen Hutchings if (spent && efx_channel_has_rx_queue(channel)) { 232d9ab7007SBen Hutchings struct efx_rx_queue *rx_queue = 233d9ab7007SBen Hutchings efx_channel_get_rx_queue(channel); 234874aeea5SJeff Kirsher 235874aeea5SJeff Kirsher /* Deliver last RX packet. */ 236874aeea5SJeff Kirsher if (channel->rx_pkt) { 237db339569SBen Hutchings __efx_rx_packet(channel, channel->rx_pkt); 238874aeea5SJeff Kirsher channel->rx_pkt = NULL; 239874aeea5SJeff Kirsher } 2409f2cb71cSBen Hutchings if (rx_queue->enabled) { 241874aeea5SJeff Kirsher efx_rx_strategy(channel); 242d9ab7007SBen Hutchings efx_fast_push_rx_descriptors(rx_queue); 243d9ab7007SBen Hutchings } 2449f2cb71cSBen Hutchings } 245874aeea5SJeff Kirsher 246874aeea5SJeff Kirsher return spent; 247874aeea5SJeff Kirsher } 248874aeea5SJeff Kirsher 249874aeea5SJeff Kirsher /* Mark channel as finished processing 250874aeea5SJeff Kirsher * 251874aeea5SJeff Kirsher * Note that since we will not receive further interrupts for this 252874aeea5SJeff Kirsher * channel before we finish processing and call the eventq_read_ack() 253874aeea5SJeff Kirsher * method, there is no need to use the interrupt hold-off timers. 254874aeea5SJeff Kirsher */ 255874aeea5SJeff Kirsher static inline void efx_channel_processed(struct efx_channel *channel) 256874aeea5SJeff Kirsher { 257874aeea5SJeff Kirsher /* The interrupt handler for this channel may set work_pending 258874aeea5SJeff Kirsher * as soon as we acknowledge the events we've seen. Make sure 259874aeea5SJeff Kirsher * it's cleared before then. */ 260874aeea5SJeff Kirsher channel->work_pending = false; 261874aeea5SJeff Kirsher smp_wmb(); 262874aeea5SJeff Kirsher 263874aeea5SJeff Kirsher efx_nic_eventq_read_ack(channel); 264874aeea5SJeff Kirsher } 265874aeea5SJeff Kirsher 266874aeea5SJeff Kirsher /* NAPI poll handler 267874aeea5SJeff Kirsher * 268874aeea5SJeff Kirsher * NAPI guarantees serialisation of polls of the same device, which 269874aeea5SJeff Kirsher * provides the guarantee required by efx_process_channel(). 270874aeea5SJeff Kirsher */ 271874aeea5SJeff Kirsher static int efx_poll(struct napi_struct *napi, int budget) 272874aeea5SJeff Kirsher { 273874aeea5SJeff Kirsher struct efx_channel *channel = 274874aeea5SJeff Kirsher container_of(napi, struct efx_channel, napi_str); 275874aeea5SJeff Kirsher struct efx_nic *efx = channel->efx; 276874aeea5SJeff Kirsher int spent; 277874aeea5SJeff Kirsher 278874aeea5SJeff Kirsher netif_vdbg(efx, intr, efx->net_dev, 279874aeea5SJeff Kirsher "channel %d NAPI poll executing on CPU %d\n", 280874aeea5SJeff Kirsher channel->channel, raw_smp_processor_id()); 281874aeea5SJeff Kirsher 282874aeea5SJeff Kirsher spent = efx_process_channel(channel, budget); 283874aeea5SJeff Kirsher 284874aeea5SJeff Kirsher if (spent < budget) { 2859d9a6973SBen Hutchings if (efx_channel_has_rx_queue(channel) && 286874aeea5SJeff Kirsher efx->irq_rx_adaptive && 287874aeea5SJeff Kirsher unlikely(++channel->irq_count == 1000)) { 288874aeea5SJeff Kirsher if (unlikely(channel->irq_mod_score < 289874aeea5SJeff Kirsher irq_adapt_low_thresh)) { 290874aeea5SJeff Kirsher if (channel->irq_moderation > 1) { 291874aeea5SJeff Kirsher channel->irq_moderation -= 1; 292874aeea5SJeff Kirsher efx->type->push_irq_moderation(channel); 293874aeea5SJeff Kirsher } 294874aeea5SJeff Kirsher } else if (unlikely(channel->irq_mod_score > 295874aeea5SJeff Kirsher irq_adapt_high_thresh)) { 296874aeea5SJeff Kirsher if (channel->irq_moderation < 297874aeea5SJeff Kirsher efx->irq_rx_moderation) { 298874aeea5SJeff Kirsher channel->irq_moderation += 1; 299874aeea5SJeff Kirsher efx->type->push_irq_moderation(channel); 300874aeea5SJeff Kirsher } 301874aeea5SJeff Kirsher } 302874aeea5SJeff Kirsher channel->irq_count = 0; 303874aeea5SJeff Kirsher channel->irq_mod_score = 0; 304874aeea5SJeff Kirsher } 305874aeea5SJeff Kirsher 306874aeea5SJeff Kirsher efx_filter_rfs_expire(channel); 307874aeea5SJeff Kirsher 308874aeea5SJeff Kirsher /* There is no race here; although napi_disable() will 309874aeea5SJeff Kirsher * only wait for napi_complete(), this isn't a problem 310874aeea5SJeff Kirsher * since efx_channel_processed() will have no effect if 311874aeea5SJeff Kirsher * interrupts have already been disabled. 312874aeea5SJeff Kirsher */ 313874aeea5SJeff Kirsher napi_complete(napi); 314874aeea5SJeff Kirsher efx_channel_processed(channel); 315874aeea5SJeff Kirsher } 316874aeea5SJeff Kirsher 317874aeea5SJeff Kirsher return spent; 318874aeea5SJeff Kirsher } 319874aeea5SJeff Kirsher 320874aeea5SJeff Kirsher /* Process the eventq of the specified channel immediately on this CPU 321874aeea5SJeff Kirsher * 322874aeea5SJeff Kirsher * Disable hardware generated interrupts, wait for any existing 323874aeea5SJeff Kirsher * processing to finish, then directly poll (and ack ) the eventq. 324874aeea5SJeff Kirsher * Finally reenable NAPI and interrupts. 325874aeea5SJeff Kirsher * 326874aeea5SJeff Kirsher * This is for use only during a loopback self-test. It must not 327874aeea5SJeff Kirsher * deliver any packets up the stack as this can result in deadlock. 328874aeea5SJeff Kirsher */ 329874aeea5SJeff Kirsher void efx_process_channel_now(struct efx_channel *channel) 330874aeea5SJeff Kirsher { 331874aeea5SJeff Kirsher struct efx_nic *efx = channel->efx; 332874aeea5SJeff Kirsher 333874aeea5SJeff Kirsher BUG_ON(channel->channel >= efx->n_channels); 334874aeea5SJeff Kirsher BUG_ON(!channel->enabled); 335874aeea5SJeff Kirsher BUG_ON(!efx->loopback_selftest); 336874aeea5SJeff Kirsher 337874aeea5SJeff Kirsher /* Disable interrupts and wait for ISRs to complete */ 338874aeea5SJeff Kirsher efx_nic_disable_interrupts(efx); 339874aeea5SJeff Kirsher if (efx->legacy_irq) { 340874aeea5SJeff Kirsher synchronize_irq(efx->legacy_irq); 341874aeea5SJeff Kirsher efx->legacy_irq_enabled = false; 342874aeea5SJeff Kirsher } 343874aeea5SJeff Kirsher if (channel->irq) 344874aeea5SJeff Kirsher synchronize_irq(channel->irq); 345874aeea5SJeff Kirsher 346874aeea5SJeff Kirsher /* Wait for any NAPI processing to complete */ 347874aeea5SJeff Kirsher napi_disable(&channel->napi_str); 348874aeea5SJeff Kirsher 349874aeea5SJeff Kirsher /* Poll the channel */ 350874aeea5SJeff Kirsher efx_process_channel(channel, channel->eventq_mask + 1); 351874aeea5SJeff Kirsher 352874aeea5SJeff Kirsher /* Ack the eventq. This may cause an interrupt to be generated 353874aeea5SJeff Kirsher * when they are reenabled */ 354874aeea5SJeff Kirsher efx_channel_processed(channel); 355874aeea5SJeff Kirsher 356874aeea5SJeff Kirsher napi_enable(&channel->napi_str); 357874aeea5SJeff Kirsher if (efx->legacy_irq) 358874aeea5SJeff Kirsher efx->legacy_irq_enabled = true; 359874aeea5SJeff Kirsher efx_nic_enable_interrupts(efx); 360874aeea5SJeff Kirsher } 361874aeea5SJeff Kirsher 362874aeea5SJeff Kirsher /* Create event queue 363874aeea5SJeff Kirsher * Event queue memory allocations are done only once. If the channel 364874aeea5SJeff Kirsher * is reset, the memory buffer will be reused; this guards against 365874aeea5SJeff Kirsher * errors during channel reset and also simplifies interrupt handling. 366874aeea5SJeff Kirsher */ 367874aeea5SJeff Kirsher static int efx_probe_eventq(struct efx_channel *channel) 368874aeea5SJeff Kirsher { 369874aeea5SJeff Kirsher struct efx_nic *efx = channel->efx; 370874aeea5SJeff Kirsher unsigned long entries; 371874aeea5SJeff Kirsher 37286ee5302SBen Hutchings netif_dbg(efx, probe, efx->net_dev, 373874aeea5SJeff Kirsher "chan %d create event queue\n", channel->channel); 374874aeea5SJeff Kirsher 375874aeea5SJeff Kirsher /* Build an event queue with room for one event per tx and rx buffer, 376874aeea5SJeff Kirsher * plus some extra for link state events and MCDI completions. */ 377874aeea5SJeff Kirsher entries = roundup_pow_of_two(efx->rxq_entries + efx->txq_entries + 128); 378874aeea5SJeff Kirsher EFX_BUG_ON_PARANOID(entries > EFX_MAX_EVQ_SIZE); 379874aeea5SJeff Kirsher channel->eventq_mask = max(entries, EFX_MIN_EVQ_SIZE) - 1; 380874aeea5SJeff Kirsher 381874aeea5SJeff Kirsher return efx_nic_probe_eventq(channel); 382874aeea5SJeff Kirsher } 383874aeea5SJeff Kirsher 384874aeea5SJeff Kirsher /* Prepare channel's event queue */ 385874aeea5SJeff Kirsher static void efx_init_eventq(struct efx_channel *channel) 386874aeea5SJeff Kirsher { 387874aeea5SJeff Kirsher netif_dbg(channel->efx, drv, channel->efx->net_dev, 388874aeea5SJeff Kirsher "chan %d init event queue\n", channel->channel); 389874aeea5SJeff Kirsher 390874aeea5SJeff Kirsher channel->eventq_read_ptr = 0; 391874aeea5SJeff Kirsher 392874aeea5SJeff Kirsher efx_nic_init_eventq(channel); 393874aeea5SJeff Kirsher } 394874aeea5SJeff Kirsher 3959f2cb71cSBen Hutchings /* Enable event queue processing and NAPI */ 3969f2cb71cSBen Hutchings static void efx_start_eventq(struct efx_channel *channel) 3979f2cb71cSBen Hutchings { 3989f2cb71cSBen Hutchings netif_dbg(channel->efx, ifup, channel->efx->net_dev, 3999f2cb71cSBen Hutchings "chan %d start event queue\n", channel->channel); 4009f2cb71cSBen Hutchings 4019f2cb71cSBen Hutchings /* The interrupt handler for this channel may set work_pending 4029f2cb71cSBen Hutchings * as soon as we enable it. Make sure it's cleared before 4039f2cb71cSBen Hutchings * then. Similarly, make sure it sees the enabled flag set. 4049f2cb71cSBen Hutchings */ 4059f2cb71cSBen Hutchings channel->work_pending = false; 4069f2cb71cSBen Hutchings channel->enabled = true; 4079f2cb71cSBen Hutchings smp_wmb(); 4089f2cb71cSBen Hutchings 4099f2cb71cSBen Hutchings napi_enable(&channel->napi_str); 4109f2cb71cSBen Hutchings efx_nic_eventq_read_ack(channel); 4119f2cb71cSBen Hutchings } 4129f2cb71cSBen Hutchings 4139f2cb71cSBen Hutchings /* Disable event queue processing and NAPI */ 4149f2cb71cSBen Hutchings static void efx_stop_eventq(struct efx_channel *channel) 4159f2cb71cSBen Hutchings { 4169f2cb71cSBen Hutchings if (!channel->enabled) 4179f2cb71cSBen Hutchings return; 4189f2cb71cSBen Hutchings 4199f2cb71cSBen Hutchings napi_disable(&channel->napi_str); 4209f2cb71cSBen Hutchings channel->enabled = false; 4219f2cb71cSBen Hutchings } 4229f2cb71cSBen Hutchings 423874aeea5SJeff Kirsher static void efx_fini_eventq(struct efx_channel *channel) 424874aeea5SJeff Kirsher { 425874aeea5SJeff Kirsher netif_dbg(channel->efx, drv, channel->efx->net_dev, 426874aeea5SJeff Kirsher "chan %d fini event queue\n", channel->channel); 427874aeea5SJeff Kirsher 428874aeea5SJeff Kirsher efx_nic_fini_eventq(channel); 429874aeea5SJeff Kirsher } 430874aeea5SJeff Kirsher 431874aeea5SJeff Kirsher static void efx_remove_eventq(struct efx_channel *channel) 432874aeea5SJeff Kirsher { 433874aeea5SJeff Kirsher netif_dbg(channel->efx, drv, channel->efx->net_dev, 434874aeea5SJeff Kirsher "chan %d remove event queue\n", channel->channel); 435874aeea5SJeff Kirsher 436874aeea5SJeff Kirsher efx_nic_remove_eventq(channel); 437874aeea5SJeff Kirsher } 438874aeea5SJeff Kirsher 439874aeea5SJeff Kirsher /************************************************************************** 440874aeea5SJeff Kirsher * 441874aeea5SJeff Kirsher * Channel handling 442874aeea5SJeff Kirsher * 443874aeea5SJeff Kirsher *************************************************************************/ 444874aeea5SJeff Kirsher 4457f967c01SBen Hutchings /* Allocate and initialise a channel structure. */ 446874aeea5SJeff Kirsher static struct efx_channel * 447874aeea5SJeff Kirsher efx_alloc_channel(struct efx_nic *efx, int i, struct efx_channel *old_channel) 448874aeea5SJeff Kirsher { 449874aeea5SJeff Kirsher struct efx_channel *channel; 450874aeea5SJeff Kirsher struct efx_rx_queue *rx_queue; 451874aeea5SJeff Kirsher struct efx_tx_queue *tx_queue; 452874aeea5SJeff Kirsher int j; 453874aeea5SJeff Kirsher 4547f967c01SBen Hutchings channel = kzalloc(sizeof(*channel), GFP_KERNEL); 4557f967c01SBen Hutchings if (!channel) 4567f967c01SBen Hutchings return NULL; 4577f967c01SBen Hutchings 4587f967c01SBen Hutchings channel->efx = efx; 4597f967c01SBen Hutchings channel->channel = i; 4607f967c01SBen Hutchings channel->type = &efx_default_channel_type; 4617f967c01SBen Hutchings 4627f967c01SBen Hutchings for (j = 0; j < EFX_TXQ_TYPES; j++) { 4637f967c01SBen Hutchings tx_queue = &channel->tx_queue[j]; 4647f967c01SBen Hutchings tx_queue->efx = efx; 4657f967c01SBen Hutchings tx_queue->queue = i * EFX_TXQ_TYPES + j; 4667f967c01SBen Hutchings tx_queue->channel = channel; 4677f967c01SBen Hutchings } 4687f967c01SBen Hutchings 4697f967c01SBen Hutchings rx_queue = &channel->rx_queue; 4707f967c01SBen Hutchings rx_queue->efx = efx; 4717f967c01SBen Hutchings setup_timer(&rx_queue->slow_fill, efx_rx_slow_fill, 4727f967c01SBen Hutchings (unsigned long)rx_queue); 4737f967c01SBen Hutchings 4747f967c01SBen Hutchings return channel; 4757f967c01SBen Hutchings } 4767f967c01SBen Hutchings 4777f967c01SBen Hutchings /* Allocate and initialise a channel structure, copying parameters 4787f967c01SBen Hutchings * (but not resources) from an old channel structure. 4797f967c01SBen Hutchings */ 4807f967c01SBen Hutchings static struct efx_channel * 4817f967c01SBen Hutchings efx_copy_channel(const struct efx_channel *old_channel) 4827f967c01SBen Hutchings { 4837f967c01SBen Hutchings struct efx_channel *channel; 4847f967c01SBen Hutchings struct efx_rx_queue *rx_queue; 4857f967c01SBen Hutchings struct efx_tx_queue *tx_queue; 4867f967c01SBen Hutchings int j; 4877f967c01SBen Hutchings 488874aeea5SJeff Kirsher channel = kmalloc(sizeof(*channel), GFP_KERNEL); 489874aeea5SJeff Kirsher if (!channel) 490874aeea5SJeff Kirsher return NULL; 491874aeea5SJeff Kirsher 492874aeea5SJeff Kirsher *channel = *old_channel; 493874aeea5SJeff Kirsher 494874aeea5SJeff Kirsher channel->napi_dev = NULL; 495874aeea5SJeff Kirsher memset(&channel->eventq, 0, sizeof(channel->eventq)); 496874aeea5SJeff Kirsher 497874aeea5SJeff Kirsher for (j = 0; j < EFX_TXQ_TYPES; j++) { 498874aeea5SJeff Kirsher tx_queue = &channel->tx_queue[j]; 499874aeea5SJeff Kirsher if (tx_queue->channel) 500874aeea5SJeff Kirsher tx_queue->channel = channel; 501874aeea5SJeff Kirsher tx_queue->buffer = NULL; 502874aeea5SJeff Kirsher memset(&tx_queue->txd, 0, sizeof(tx_queue->txd)); 503874aeea5SJeff Kirsher } 504874aeea5SJeff Kirsher 505874aeea5SJeff Kirsher rx_queue = &channel->rx_queue; 5067f967c01SBen Hutchings rx_queue->buffer = NULL; 5077f967c01SBen Hutchings memset(&rx_queue->rxd, 0, sizeof(rx_queue->rxd)); 508874aeea5SJeff Kirsher setup_timer(&rx_queue->slow_fill, efx_rx_slow_fill, 509874aeea5SJeff Kirsher (unsigned long)rx_queue); 510874aeea5SJeff Kirsher 511874aeea5SJeff Kirsher return channel; 512874aeea5SJeff Kirsher } 513874aeea5SJeff Kirsher 514874aeea5SJeff Kirsher static int efx_probe_channel(struct efx_channel *channel) 515874aeea5SJeff Kirsher { 516874aeea5SJeff Kirsher struct efx_tx_queue *tx_queue; 517874aeea5SJeff Kirsher struct efx_rx_queue *rx_queue; 518874aeea5SJeff Kirsher int rc; 519874aeea5SJeff Kirsher 520874aeea5SJeff Kirsher netif_dbg(channel->efx, probe, channel->efx->net_dev, 521874aeea5SJeff Kirsher "creating channel %d\n", channel->channel); 522874aeea5SJeff Kirsher 5237f967c01SBen Hutchings rc = channel->type->pre_probe(channel); 5247f967c01SBen Hutchings if (rc) 5257f967c01SBen Hutchings goto fail; 5267f967c01SBen Hutchings 527874aeea5SJeff Kirsher rc = efx_probe_eventq(channel); 528874aeea5SJeff Kirsher if (rc) 5297f967c01SBen Hutchings goto fail; 530874aeea5SJeff Kirsher 531874aeea5SJeff Kirsher efx_for_each_channel_tx_queue(tx_queue, channel) { 532874aeea5SJeff Kirsher rc = efx_probe_tx_queue(tx_queue); 533874aeea5SJeff Kirsher if (rc) 5347f967c01SBen Hutchings goto fail; 535874aeea5SJeff Kirsher } 536874aeea5SJeff Kirsher 537874aeea5SJeff Kirsher efx_for_each_channel_rx_queue(rx_queue, channel) { 538874aeea5SJeff Kirsher rc = efx_probe_rx_queue(rx_queue); 539874aeea5SJeff Kirsher if (rc) 5407f967c01SBen Hutchings goto fail; 541874aeea5SJeff Kirsher } 542874aeea5SJeff Kirsher 543874aeea5SJeff Kirsher channel->n_rx_frm_trunc = 0; 544874aeea5SJeff Kirsher 545874aeea5SJeff Kirsher return 0; 546874aeea5SJeff Kirsher 5477f967c01SBen Hutchings fail: 5487f967c01SBen Hutchings efx_remove_channel(channel); 549874aeea5SJeff Kirsher return rc; 550874aeea5SJeff Kirsher } 551874aeea5SJeff Kirsher 5527f967c01SBen Hutchings static void 5537f967c01SBen Hutchings efx_get_channel_name(struct efx_channel *channel, char *buf, size_t len) 5547f967c01SBen Hutchings { 5557f967c01SBen Hutchings struct efx_nic *efx = channel->efx; 5567f967c01SBen Hutchings const char *type; 5577f967c01SBen Hutchings int number; 5587f967c01SBen Hutchings 5597f967c01SBen Hutchings number = channel->channel; 5607f967c01SBen Hutchings if (efx->tx_channel_offset == 0) { 5617f967c01SBen Hutchings type = ""; 5627f967c01SBen Hutchings } else if (channel->channel < efx->tx_channel_offset) { 5637f967c01SBen Hutchings type = "-rx"; 5647f967c01SBen Hutchings } else { 5657f967c01SBen Hutchings type = "-tx"; 5667f967c01SBen Hutchings number -= efx->tx_channel_offset; 5677f967c01SBen Hutchings } 5687f967c01SBen Hutchings snprintf(buf, len, "%s%s-%d", efx->name, type, number); 5697f967c01SBen Hutchings } 570874aeea5SJeff Kirsher 571874aeea5SJeff Kirsher static void efx_set_channel_names(struct efx_nic *efx) 572874aeea5SJeff Kirsher { 573874aeea5SJeff Kirsher struct efx_channel *channel; 574874aeea5SJeff Kirsher 5757f967c01SBen Hutchings efx_for_each_channel(channel, efx) 5767f967c01SBen Hutchings channel->type->get_name(channel, 5777f967c01SBen Hutchings efx->channel_name[channel->channel], 5787f967c01SBen Hutchings sizeof(efx->channel_name[0])); 579874aeea5SJeff Kirsher } 580874aeea5SJeff Kirsher 581874aeea5SJeff Kirsher static int efx_probe_channels(struct efx_nic *efx) 582874aeea5SJeff Kirsher { 583874aeea5SJeff Kirsher struct efx_channel *channel; 584874aeea5SJeff Kirsher int rc; 585874aeea5SJeff Kirsher 586874aeea5SJeff Kirsher /* Restart special buffer allocation */ 587874aeea5SJeff Kirsher efx->next_buffer_table = 0; 588874aeea5SJeff Kirsher 589c92aaff1SBen Hutchings /* Probe channels in reverse, so that any 'extra' channels 590c92aaff1SBen Hutchings * use the start of the buffer table. This allows the traffic 591c92aaff1SBen Hutchings * channels to be resized without moving them or wasting the 592c92aaff1SBen Hutchings * entries before them. 593c92aaff1SBen Hutchings */ 594c92aaff1SBen Hutchings efx_for_each_channel_rev(channel, efx) { 595874aeea5SJeff Kirsher rc = efx_probe_channel(channel); 596874aeea5SJeff Kirsher if (rc) { 597874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 598874aeea5SJeff Kirsher "failed to create channel %d\n", 599874aeea5SJeff Kirsher channel->channel); 600874aeea5SJeff Kirsher goto fail; 601874aeea5SJeff Kirsher } 602874aeea5SJeff Kirsher } 603874aeea5SJeff Kirsher efx_set_channel_names(efx); 604874aeea5SJeff Kirsher 605874aeea5SJeff Kirsher return 0; 606874aeea5SJeff Kirsher 607874aeea5SJeff Kirsher fail: 608874aeea5SJeff Kirsher efx_remove_channels(efx); 609874aeea5SJeff Kirsher return rc; 610874aeea5SJeff Kirsher } 611874aeea5SJeff Kirsher 612874aeea5SJeff Kirsher /* Channels are shutdown and reinitialised whilst the NIC is running 613874aeea5SJeff Kirsher * to propagate configuration changes (mtu, checksum offload), or 614874aeea5SJeff Kirsher * to clear hardware error conditions 615874aeea5SJeff Kirsher */ 6169f2cb71cSBen Hutchings static void efx_start_datapath(struct efx_nic *efx) 617874aeea5SJeff Kirsher { 618874aeea5SJeff Kirsher struct efx_tx_queue *tx_queue; 619874aeea5SJeff Kirsher struct efx_rx_queue *rx_queue; 620874aeea5SJeff Kirsher struct efx_channel *channel; 621874aeea5SJeff Kirsher 622874aeea5SJeff Kirsher /* Calculate the rx buffer allocation parameters required to 623874aeea5SJeff Kirsher * support the current MTU, including padding for header 624874aeea5SJeff Kirsher * alignment and overruns. 625874aeea5SJeff Kirsher */ 626874aeea5SJeff Kirsher efx->rx_buffer_len = (max(EFX_PAGE_IP_ALIGN, NET_IP_ALIGN) + 627874aeea5SJeff Kirsher EFX_MAX_FRAME_LEN(efx->net_dev->mtu) + 628874aeea5SJeff Kirsher efx->type->rx_buffer_hash_size + 629874aeea5SJeff Kirsher efx->type->rx_buffer_padding); 630874aeea5SJeff Kirsher efx->rx_buffer_order = get_order(efx->rx_buffer_len + 631874aeea5SJeff Kirsher sizeof(struct efx_rx_page_state)); 632874aeea5SJeff Kirsher 633874aeea5SJeff Kirsher /* Initialise the channels */ 634874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) { 635874aeea5SJeff Kirsher efx_for_each_channel_tx_queue(tx_queue, channel) 636874aeea5SJeff Kirsher efx_init_tx_queue(tx_queue); 637874aeea5SJeff Kirsher 638874aeea5SJeff Kirsher /* The rx buffer allocation strategy is MTU dependent */ 639874aeea5SJeff Kirsher efx_rx_strategy(channel); 640874aeea5SJeff Kirsher 6419f2cb71cSBen Hutchings efx_for_each_channel_rx_queue(rx_queue, channel) { 642874aeea5SJeff Kirsher efx_init_rx_queue(rx_queue); 6439f2cb71cSBen Hutchings efx_nic_generate_fill_event(rx_queue); 6449f2cb71cSBen Hutchings } 645874aeea5SJeff Kirsher 646874aeea5SJeff Kirsher WARN_ON(channel->rx_pkt != NULL); 647874aeea5SJeff Kirsher efx_rx_strategy(channel); 648874aeea5SJeff Kirsher } 6499f2cb71cSBen Hutchings 6509f2cb71cSBen Hutchings if (netif_device_present(efx->net_dev)) 6519f2cb71cSBen Hutchings netif_tx_wake_all_queues(efx->net_dev); 652874aeea5SJeff Kirsher } 653874aeea5SJeff Kirsher 6549f2cb71cSBen Hutchings static void efx_stop_datapath(struct efx_nic *efx) 655874aeea5SJeff Kirsher { 656874aeea5SJeff Kirsher struct efx_channel *channel; 657874aeea5SJeff Kirsher struct efx_tx_queue *tx_queue; 658874aeea5SJeff Kirsher struct efx_rx_queue *rx_queue; 6593dca9d2dSStuart Hodgson struct pci_dev *dev = efx->pci_dev; 660874aeea5SJeff Kirsher int rc; 661874aeea5SJeff Kirsher 662874aeea5SJeff Kirsher EFX_ASSERT_RESET_SERIALISED(efx); 663874aeea5SJeff Kirsher BUG_ON(efx->port_enabled); 664874aeea5SJeff Kirsher 6653dca9d2dSStuart Hodgson /* Only perform flush if dma is enabled */ 6663dca9d2dSStuart Hodgson if (dev->is_busmaster) { 667874aeea5SJeff Kirsher rc = efx_nic_flush_queues(efx); 6683dca9d2dSStuart Hodgson 669874aeea5SJeff Kirsher if (rc && EFX_WORKAROUND_7803(efx)) { 670874aeea5SJeff Kirsher /* Schedule a reset to recover from the flush failure. The 671874aeea5SJeff Kirsher * descriptor caches reference memory we're about to free, 672874aeea5SJeff Kirsher * but falcon_reconfigure_mac_wrapper() won't reconnect 673874aeea5SJeff Kirsher * the MACs because of the pending reset. */ 674874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, 675874aeea5SJeff Kirsher "Resetting to recover from flush failure\n"); 676874aeea5SJeff Kirsher efx_schedule_reset(efx, RESET_TYPE_ALL); 677874aeea5SJeff Kirsher } else if (rc) { 678874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, "failed to flush queues\n"); 679874aeea5SJeff Kirsher } else { 680874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, 681874aeea5SJeff Kirsher "successfully flushed all queues\n"); 682874aeea5SJeff Kirsher } 6833dca9d2dSStuart Hodgson } 684874aeea5SJeff Kirsher 685874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) { 6869f2cb71cSBen Hutchings /* RX packet processing is pipelined, so wait for the 6879f2cb71cSBen Hutchings * NAPI handler to complete. At least event queue 0 6889f2cb71cSBen Hutchings * might be kept active by non-data events, so don't 6899f2cb71cSBen Hutchings * use napi_synchronize() but actually disable NAPI 6909f2cb71cSBen Hutchings * temporarily. 6919f2cb71cSBen Hutchings */ 6929f2cb71cSBen Hutchings if (efx_channel_has_rx_queue(channel)) { 6939f2cb71cSBen Hutchings efx_stop_eventq(channel); 6949f2cb71cSBen Hutchings efx_start_eventq(channel); 6959f2cb71cSBen Hutchings } 696874aeea5SJeff Kirsher 697874aeea5SJeff Kirsher efx_for_each_channel_rx_queue(rx_queue, channel) 698874aeea5SJeff Kirsher efx_fini_rx_queue(rx_queue); 699874aeea5SJeff Kirsher efx_for_each_possible_channel_tx_queue(tx_queue, channel) 700874aeea5SJeff Kirsher efx_fini_tx_queue(tx_queue); 701874aeea5SJeff Kirsher } 702874aeea5SJeff Kirsher } 703874aeea5SJeff Kirsher 704874aeea5SJeff Kirsher static void efx_remove_channel(struct efx_channel *channel) 705874aeea5SJeff Kirsher { 706874aeea5SJeff Kirsher struct efx_tx_queue *tx_queue; 707874aeea5SJeff Kirsher struct efx_rx_queue *rx_queue; 708874aeea5SJeff Kirsher 709874aeea5SJeff Kirsher netif_dbg(channel->efx, drv, channel->efx->net_dev, 710874aeea5SJeff Kirsher "destroy chan %d\n", channel->channel); 711874aeea5SJeff Kirsher 712874aeea5SJeff Kirsher efx_for_each_channel_rx_queue(rx_queue, channel) 713874aeea5SJeff Kirsher efx_remove_rx_queue(rx_queue); 714874aeea5SJeff Kirsher efx_for_each_possible_channel_tx_queue(tx_queue, channel) 715874aeea5SJeff Kirsher efx_remove_tx_queue(tx_queue); 716874aeea5SJeff Kirsher efx_remove_eventq(channel); 717874aeea5SJeff Kirsher } 718874aeea5SJeff Kirsher 719874aeea5SJeff Kirsher static void efx_remove_channels(struct efx_nic *efx) 720874aeea5SJeff Kirsher { 721874aeea5SJeff Kirsher struct efx_channel *channel; 722874aeea5SJeff Kirsher 723874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) 724874aeea5SJeff Kirsher efx_remove_channel(channel); 725874aeea5SJeff Kirsher } 726874aeea5SJeff Kirsher 727874aeea5SJeff Kirsher int 728874aeea5SJeff Kirsher efx_realloc_channels(struct efx_nic *efx, u32 rxq_entries, u32 txq_entries) 729874aeea5SJeff Kirsher { 730874aeea5SJeff Kirsher struct efx_channel *other_channel[EFX_MAX_CHANNELS], *channel; 731874aeea5SJeff Kirsher u32 old_rxq_entries, old_txq_entries; 7327f967c01SBen Hutchings unsigned i, next_buffer_table = 0; 7337f967c01SBen Hutchings int rc = 0; 7347f967c01SBen Hutchings 7357f967c01SBen Hutchings /* Not all channels should be reallocated. We must avoid 7367f967c01SBen Hutchings * reallocating their buffer table entries. 7377f967c01SBen Hutchings */ 7387f967c01SBen Hutchings efx_for_each_channel(channel, efx) { 7397f967c01SBen Hutchings struct efx_rx_queue *rx_queue; 7407f967c01SBen Hutchings struct efx_tx_queue *tx_queue; 7417f967c01SBen Hutchings 7427f967c01SBen Hutchings if (channel->type->copy) 7437f967c01SBen Hutchings continue; 7447f967c01SBen Hutchings next_buffer_table = max(next_buffer_table, 7457f967c01SBen Hutchings channel->eventq.index + 7467f967c01SBen Hutchings channel->eventq.entries); 7477f967c01SBen Hutchings efx_for_each_channel_rx_queue(rx_queue, channel) 7487f967c01SBen Hutchings next_buffer_table = max(next_buffer_table, 7497f967c01SBen Hutchings rx_queue->rxd.index + 7507f967c01SBen Hutchings rx_queue->rxd.entries); 7517f967c01SBen Hutchings efx_for_each_channel_tx_queue(tx_queue, channel) 7527f967c01SBen Hutchings next_buffer_table = max(next_buffer_table, 7537f967c01SBen Hutchings tx_queue->txd.index + 7547f967c01SBen Hutchings tx_queue->txd.entries); 7557f967c01SBen Hutchings } 756874aeea5SJeff Kirsher 757874aeea5SJeff Kirsher efx_stop_all(efx); 7587f967c01SBen Hutchings efx_stop_interrupts(efx, true); 759874aeea5SJeff Kirsher 7607f967c01SBen Hutchings /* Clone channels (where possible) */ 761874aeea5SJeff Kirsher memset(other_channel, 0, sizeof(other_channel)); 762874aeea5SJeff Kirsher for (i = 0; i < efx->n_channels; i++) { 7637f967c01SBen Hutchings channel = efx->channel[i]; 7647f967c01SBen Hutchings if (channel->type->copy) 7657f967c01SBen Hutchings channel = channel->type->copy(channel); 766874aeea5SJeff Kirsher if (!channel) { 767874aeea5SJeff Kirsher rc = -ENOMEM; 768874aeea5SJeff Kirsher goto out; 769874aeea5SJeff Kirsher } 770874aeea5SJeff Kirsher other_channel[i] = channel; 771874aeea5SJeff Kirsher } 772874aeea5SJeff Kirsher 773874aeea5SJeff Kirsher /* Swap entry counts and channel pointers */ 774874aeea5SJeff Kirsher old_rxq_entries = efx->rxq_entries; 775874aeea5SJeff Kirsher old_txq_entries = efx->txq_entries; 776874aeea5SJeff Kirsher efx->rxq_entries = rxq_entries; 777874aeea5SJeff Kirsher efx->txq_entries = txq_entries; 778874aeea5SJeff Kirsher for (i = 0; i < efx->n_channels; i++) { 779874aeea5SJeff Kirsher channel = efx->channel[i]; 780874aeea5SJeff Kirsher efx->channel[i] = other_channel[i]; 781874aeea5SJeff Kirsher other_channel[i] = channel; 782874aeea5SJeff Kirsher } 783874aeea5SJeff Kirsher 7847f967c01SBen Hutchings /* Restart buffer table allocation */ 7857f967c01SBen Hutchings efx->next_buffer_table = next_buffer_table; 7867f967c01SBen Hutchings 7877f967c01SBen Hutchings for (i = 0; i < efx->n_channels; i++) { 7887f967c01SBen Hutchings channel = efx->channel[i]; 7897f967c01SBen Hutchings if (!channel->type->copy) 7907f967c01SBen Hutchings continue; 7917f967c01SBen Hutchings rc = efx_probe_channel(channel); 792874aeea5SJeff Kirsher if (rc) 793874aeea5SJeff Kirsher goto rollback; 7947f967c01SBen Hutchings efx_init_napi_channel(efx->channel[i]); 795874aeea5SJeff Kirsher } 796874aeea5SJeff Kirsher 7977f967c01SBen Hutchings out: 7987f967c01SBen Hutchings /* Destroy unused channel structures */ 7997f967c01SBen Hutchings for (i = 0; i < efx->n_channels; i++) { 8007f967c01SBen Hutchings channel = other_channel[i]; 8017f967c01SBen Hutchings if (channel && channel->type->copy) { 8027f967c01SBen Hutchings efx_fini_napi_channel(channel); 8037f967c01SBen Hutchings efx_remove_channel(channel); 8047f967c01SBen Hutchings kfree(channel); 8057f967c01SBen Hutchings } 8067f967c01SBen Hutchings } 8077f967c01SBen Hutchings 8087f967c01SBen Hutchings efx_start_interrupts(efx, true); 809874aeea5SJeff Kirsher efx_start_all(efx); 810874aeea5SJeff Kirsher return rc; 811874aeea5SJeff Kirsher 812874aeea5SJeff Kirsher rollback: 813874aeea5SJeff Kirsher /* Swap back */ 814874aeea5SJeff Kirsher efx->rxq_entries = old_rxq_entries; 815874aeea5SJeff Kirsher efx->txq_entries = old_txq_entries; 816874aeea5SJeff Kirsher for (i = 0; i < efx->n_channels; i++) { 817874aeea5SJeff Kirsher channel = efx->channel[i]; 818874aeea5SJeff Kirsher efx->channel[i] = other_channel[i]; 819874aeea5SJeff Kirsher other_channel[i] = channel; 820874aeea5SJeff Kirsher } 821874aeea5SJeff Kirsher goto out; 822874aeea5SJeff Kirsher } 823874aeea5SJeff Kirsher 824874aeea5SJeff Kirsher void efx_schedule_slow_fill(struct efx_rx_queue *rx_queue) 825874aeea5SJeff Kirsher { 826874aeea5SJeff Kirsher mod_timer(&rx_queue->slow_fill, jiffies + msecs_to_jiffies(100)); 827874aeea5SJeff Kirsher } 828874aeea5SJeff Kirsher 8297f967c01SBen Hutchings static const struct efx_channel_type efx_default_channel_type = { 8307f967c01SBen Hutchings .pre_probe = efx_channel_dummy_op_int, 8317f967c01SBen Hutchings .get_name = efx_get_channel_name, 8327f967c01SBen Hutchings .copy = efx_copy_channel, 8337f967c01SBen Hutchings .keep_eventq = false, 8347f967c01SBen Hutchings }; 8357f967c01SBen Hutchings 8367f967c01SBen Hutchings int efx_channel_dummy_op_int(struct efx_channel *channel) 8377f967c01SBen Hutchings { 8387f967c01SBen Hutchings return 0; 8397f967c01SBen Hutchings } 8407f967c01SBen Hutchings 841874aeea5SJeff Kirsher /************************************************************************** 842874aeea5SJeff Kirsher * 843874aeea5SJeff Kirsher * Port handling 844874aeea5SJeff Kirsher * 845874aeea5SJeff Kirsher **************************************************************************/ 846874aeea5SJeff Kirsher 847874aeea5SJeff Kirsher /* This ensures that the kernel is kept informed (via 848874aeea5SJeff Kirsher * netif_carrier_on/off) of the link status, and also maintains the 849874aeea5SJeff Kirsher * link status's stop on the port's TX queue. 850874aeea5SJeff Kirsher */ 851874aeea5SJeff Kirsher void efx_link_status_changed(struct efx_nic *efx) 852874aeea5SJeff Kirsher { 853874aeea5SJeff Kirsher struct efx_link_state *link_state = &efx->link_state; 854874aeea5SJeff Kirsher 855874aeea5SJeff Kirsher /* SFC Bug 5356: A net_dev notifier is registered, so we must ensure 856874aeea5SJeff Kirsher * that no events are triggered between unregister_netdev() and the 857874aeea5SJeff Kirsher * driver unloading. A more general condition is that NETDEV_CHANGE 858874aeea5SJeff Kirsher * can only be generated between NETDEV_UP and NETDEV_DOWN */ 859874aeea5SJeff Kirsher if (!netif_running(efx->net_dev)) 860874aeea5SJeff Kirsher return; 861874aeea5SJeff Kirsher 862874aeea5SJeff Kirsher if (link_state->up != netif_carrier_ok(efx->net_dev)) { 863874aeea5SJeff Kirsher efx->n_link_state_changes++; 864874aeea5SJeff Kirsher 865874aeea5SJeff Kirsher if (link_state->up) 866874aeea5SJeff Kirsher netif_carrier_on(efx->net_dev); 867874aeea5SJeff Kirsher else 868874aeea5SJeff Kirsher netif_carrier_off(efx->net_dev); 869874aeea5SJeff Kirsher } 870874aeea5SJeff Kirsher 871874aeea5SJeff Kirsher /* Status message for kernel log */ 8722aa9ef11SBen Hutchings if (link_state->up) 873874aeea5SJeff Kirsher netif_info(efx, link, efx->net_dev, 874874aeea5SJeff Kirsher "link up at %uMbps %s-duplex (MTU %d)%s\n", 875874aeea5SJeff Kirsher link_state->speed, link_state->fd ? "full" : "half", 876874aeea5SJeff Kirsher efx->net_dev->mtu, 877874aeea5SJeff Kirsher (efx->promiscuous ? " [PROMISC]" : "")); 8782aa9ef11SBen Hutchings else 879874aeea5SJeff Kirsher netif_info(efx, link, efx->net_dev, "link down\n"); 880874aeea5SJeff Kirsher } 881874aeea5SJeff Kirsher 882874aeea5SJeff Kirsher void efx_link_set_advertising(struct efx_nic *efx, u32 advertising) 883874aeea5SJeff Kirsher { 884874aeea5SJeff Kirsher efx->link_advertising = advertising; 885874aeea5SJeff Kirsher if (advertising) { 886874aeea5SJeff Kirsher if (advertising & ADVERTISED_Pause) 887874aeea5SJeff Kirsher efx->wanted_fc |= (EFX_FC_TX | EFX_FC_RX); 888874aeea5SJeff Kirsher else 889874aeea5SJeff Kirsher efx->wanted_fc &= ~(EFX_FC_TX | EFX_FC_RX); 890874aeea5SJeff Kirsher if (advertising & ADVERTISED_Asym_Pause) 891874aeea5SJeff Kirsher efx->wanted_fc ^= EFX_FC_TX; 892874aeea5SJeff Kirsher } 893874aeea5SJeff Kirsher } 894874aeea5SJeff Kirsher 895874aeea5SJeff Kirsher void efx_link_set_wanted_fc(struct efx_nic *efx, u8 wanted_fc) 896874aeea5SJeff Kirsher { 897874aeea5SJeff Kirsher efx->wanted_fc = wanted_fc; 898874aeea5SJeff Kirsher if (efx->link_advertising) { 899874aeea5SJeff Kirsher if (wanted_fc & EFX_FC_RX) 900874aeea5SJeff Kirsher efx->link_advertising |= (ADVERTISED_Pause | 901874aeea5SJeff Kirsher ADVERTISED_Asym_Pause); 902874aeea5SJeff Kirsher else 903874aeea5SJeff Kirsher efx->link_advertising &= ~(ADVERTISED_Pause | 904874aeea5SJeff Kirsher ADVERTISED_Asym_Pause); 905874aeea5SJeff Kirsher if (wanted_fc & EFX_FC_TX) 906874aeea5SJeff Kirsher efx->link_advertising ^= ADVERTISED_Asym_Pause; 907874aeea5SJeff Kirsher } 908874aeea5SJeff Kirsher } 909874aeea5SJeff Kirsher 910874aeea5SJeff Kirsher static void efx_fini_port(struct efx_nic *efx); 911874aeea5SJeff Kirsher 912874aeea5SJeff Kirsher /* Push loopback/power/transmit disable settings to the PHY, and reconfigure 913874aeea5SJeff Kirsher * the MAC appropriately. All other PHY configuration changes are pushed 914874aeea5SJeff Kirsher * through phy_op->set_settings(), and pushed asynchronously to the MAC 915874aeea5SJeff Kirsher * through efx_monitor(). 916874aeea5SJeff Kirsher * 917874aeea5SJeff Kirsher * Callers must hold the mac_lock 918874aeea5SJeff Kirsher */ 919874aeea5SJeff Kirsher int __efx_reconfigure_port(struct efx_nic *efx) 920874aeea5SJeff Kirsher { 921874aeea5SJeff Kirsher enum efx_phy_mode phy_mode; 922874aeea5SJeff Kirsher int rc; 923874aeea5SJeff Kirsher 924874aeea5SJeff Kirsher WARN_ON(!mutex_is_locked(&efx->mac_lock)); 925874aeea5SJeff Kirsher 9260fca8c97SBen Hutchings /* Serialise the promiscuous flag with efx_set_rx_mode. */ 927874aeea5SJeff Kirsher netif_addr_lock_bh(efx->net_dev); 928874aeea5SJeff Kirsher netif_addr_unlock_bh(efx->net_dev); 929874aeea5SJeff Kirsher 930874aeea5SJeff Kirsher /* Disable PHY transmit in mac level loopbacks */ 931874aeea5SJeff Kirsher phy_mode = efx->phy_mode; 932874aeea5SJeff Kirsher if (LOOPBACK_INTERNAL(efx)) 933874aeea5SJeff Kirsher efx->phy_mode |= PHY_MODE_TX_DISABLED; 934874aeea5SJeff Kirsher else 935874aeea5SJeff Kirsher efx->phy_mode &= ~PHY_MODE_TX_DISABLED; 936874aeea5SJeff Kirsher 937874aeea5SJeff Kirsher rc = efx->type->reconfigure_port(efx); 938874aeea5SJeff Kirsher 939874aeea5SJeff Kirsher if (rc) 940874aeea5SJeff Kirsher efx->phy_mode = phy_mode; 941874aeea5SJeff Kirsher 942874aeea5SJeff Kirsher return rc; 943874aeea5SJeff Kirsher } 944874aeea5SJeff Kirsher 945874aeea5SJeff Kirsher /* Reinitialise the MAC to pick up new PHY settings, even if the port is 946874aeea5SJeff Kirsher * disabled. */ 947874aeea5SJeff Kirsher int efx_reconfigure_port(struct efx_nic *efx) 948874aeea5SJeff Kirsher { 949874aeea5SJeff Kirsher int rc; 950874aeea5SJeff Kirsher 951874aeea5SJeff Kirsher EFX_ASSERT_RESET_SERIALISED(efx); 952874aeea5SJeff Kirsher 953874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 954874aeea5SJeff Kirsher rc = __efx_reconfigure_port(efx); 955874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 956874aeea5SJeff Kirsher 957874aeea5SJeff Kirsher return rc; 958874aeea5SJeff Kirsher } 959874aeea5SJeff Kirsher 960874aeea5SJeff Kirsher /* Asynchronous work item for changing MAC promiscuity and multicast 961874aeea5SJeff Kirsher * hash. Avoid a drain/rx_ingress enable by reconfiguring the current 962874aeea5SJeff Kirsher * MAC directly. */ 963874aeea5SJeff Kirsher static void efx_mac_work(struct work_struct *data) 964874aeea5SJeff Kirsher { 965874aeea5SJeff Kirsher struct efx_nic *efx = container_of(data, struct efx_nic, mac_work); 966874aeea5SJeff Kirsher 967874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 96830b81cdaSBen Hutchings if (efx->port_enabled) 969710b208dSBen Hutchings efx->type->reconfigure_mac(efx); 970874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 971874aeea5SJeff Kirsher } 972874aeea5SJeff Kirsher 973874aeea5SJeff Kirsher static int efx_probe_port(struct efx_nic *efx) 974874aeea5SJeff Kirsher { 975874aeea5SJeff Kirsher int rc; 976874aeea5SJeff Kirsher 977874aeea5SJeff Kirsher netif_dbg(efx, probe, efx->net_dev, "create port\n"); 978874aeea5SJeff Kirsher 979874aeea5SJeff Kirsher if (phy_flash_cfg) 980874aeea5SJeff Kirsher efx->phy_mode = PHY_MODE_SPECIAL; 981874aeea5SJeff Kirsher 982874aeea5SJeff Kirsher /* Connect up MAC/PHY operations table */ 983874aeea5SJeff Kirsher rc = efx->type->probe_port(efx); 984874aeea5SJeff Kirsher if (rc) 985874aeea5SJeff Kirsher return rc; 986874aeea5SJeff Kirsher 987e332bcb3SBen Hutchings /* Initialise MAC address to permanent address */ 988e332bcb3SBen Hutchings memcpy(efx->net_dev->dev_addr, efx->net_dev->perm_addr, ETH_ALEN); 989874aeea5SJeff Kirsher 990874aeea5SJeff Kirsher return 0; 991874aeea5SJeff Kirsher } 992874aeea5SJeff Kirsher 993874aeea5SJeff Kirsher static int efx_init_port(struct efx_nic *efx) 994874aeea5SJeff Kirsher { 995874aeea5SJeff Kirsher int rc; 996874aeea5SJeff Kirsher 997874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "init port\n"); 998874aeea5SJeff Kirsher 999874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 1000874aeea5SJeff Kirsher 1001874aeea5SJeff Kirsher rc = efx->phy_op->init(efx); 1002874aeea5SJeff Kirsher if (rc) 1003874aeea5SJeff Kirsher goto fail1; 1004874aeea5SJeff Kirsher 1005874aeea5SJeff Kirsher efx->port_initialized = true; 1006874aeea5SJeff Kirsher 1007874aeea5SJeff Kirsher /* Reconfigure the MAC before creating dma queues (required for 1008874aeea5SJeff Kirsher * Falcon/A1 where RX_INGR_EN/TX_DRAIN_EN isn't supported) */ 1009710b208dSBen Hutchings efx->type->reconfigure_mac(efx); 1010874aeea5SJeff Kirsher 1011874aeea5SJeff Kirsher /* Ensure the PHY advertises the correct flow control settings */ 1012874aeea5SJeff Kirsher rc = efx->phy_op->reconfigure(efx); 1013874aeea5SJeff Kirsher if (rc) 1014874aeea5SJeff Kirsher goto fail2; 1015874aeea5SJeff Kirsher 1016874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 1017874aeea5SJeff Kirsher return 0; 1018874aeea5SJeff Kirsher 1019874aeea5SJeff Kirsher fail2: 1020874aeea5SJeff Kirsher efx->phy_op->fini(efx); 1021874aeea5SJeff Kirsher fail1: 1022874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 1023874aeea5SJeff Kirsher return rc; 1024874aeea5SJeff Kirsher } 1025874aeea5SJeff Kirsher 1026874aeea5SJeff Kirsher static void efx_start_port(struct efx_nic *efx) 1027874aeea5SJeff Kirsher { 1028874aeea5SJeff Kirsher netif_dbg(efx, ifup, efx->net_dev, "start port\n"); 1029874aeea5SJeff Kirsher BUG_ON(efx->port_enabled); 1030874aeea5SJeff Kirsher 1031874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 1032874aeea5SJeff Kirsher efx->port_enabled = true; 1033874aeea5SJeff Kirsher 1034874aeea5SJeff Kirsher /* efx_mac_work() might have been scheduled after efx_stop_port(), 1035874aeea5SJeff Kirsher * and then cancelled by efx_flush_all() */ 1036710b208dSBen Hutchings efx->type->reconfigure_mac(efx); 1037874aeea5SJeff Kirsher 1038874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 1039874aeea5SJeff Kirsher } 1040874aeea5SJeff Kirsher 1041874aeea5SJeff Kirsher /* Prevent efx_mac_work() and efx_monitor() from working */ 1042874aeea5SJeff Kirsher static void efx_stop_port(struct efx_nic *efx) 1043874aeea5SJeff Kirsher { 1044874aeea5SJeff Kirsher netif_dbg(efx, ifdown, efx->net_dev, "stop port\n"); 1045874aeea5SJeff Kirsher 1046874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 1047874aeea5SJeff Kirsher efx->port_enabled = false; 1048874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 1049874aeea5SJeff Kirsher 1050874aeea5SJeff Kirsher /* Serialise against efx_set_multicast_list() */ 1051874aeea5SJeff Kirsher netif_addr_lock_bh(efx->net_dev); 1052874aeea5SJeff Kirsher netif_addr_unlock_bh(efx->net_dev); 1053874aeea5SJeff Kirsher } 1054874aeea5SJeff Kirsher 1055874aeea5SJeff Kirsher static void efx_fini_port(struct efx_nic *efx) 1056874aeea5SJeff Kirsher { 1057874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "shut down port\n"); 1058874aeea5SJeff Kirsher 1059874aeea5SJeff Kirsher if (!efx->port_initialized) 1060874aeea5SJeff Kirsher return; 1061874aeea5SJeff Kirsher 1062874aeea5SJeff Kirsher efx->phy_op->fini(efx); 1063874aeea5SJeff Kirsher efx->port_initialized = false; 1064874aeea5SJeff Kirsher 1065874aeea5SJeff Kirsher efx->link_state.up = false; 1066874aeea5SJeff Kirsher efx_link_status_changed(efx); 1067874aeea5SJeff Kirsher } 1068874aeea5SJeff Kirsher 1069874aeea5SJeff Kirsher static void efx_remove_port(struct efx_nic *efx) 1070874aeea5SJeff Kirsher { 1071874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "destroying port\n"); 1072874aeea5SJeff Kirsher 1073874aeea5SJeff Kirsher efx->type->remove_port(efx); 1074874aeea5SJeff Kirsher } 1075874aeea5SJeff Kirsher 1076874aeea5SJeff Kirsher /************************************************************************** 1077874aeea5SJeff Kirsher * 1078874aeea5SJeff Kirsher * NIC handling 1079874aeea5SJeff Kirsher * 1080874aeea5SJeff Kirsher **************************************************************************/ 1081874aeea5SJeff Kirsher 1082874aeea5SJeff Kirsher /* This configures the PCI device to enable I/O and DMA. */ 1083874aeea5SJeff Kirsher static int efx_init_io(struct efx_nic *efx) 1084874aeea5SJeff Kirsher { 1085874aeea5SJeff Kirsher struct pci_dev *pci_dev = efx->pci_dev; 1086874aeea5SJeff Kirsher dma_addr_t dma_mask = efx->type->max_dma_mask; 1087874aeea5SJeff Kirsher int rc; 1088874aeea5SJeff Kirsher 1089874aeea5SJeff Kirsher netif_dbg(efx, probe, efx->net_dev, "initialising I/O\n"); 1090874aeea5SJeff Kirsher 1091874aeea5SJeff Kirsher rc = pci_enable_device(pci_dev); 1092874aeea5SJeff Kirsher if (rc) { 1093874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 1094874aeea5SJeff Kirsher "failed to enable PCI device\n"); 1095874aeea5SJeff Kirsher goto fail1; 1096874aeea5SJeff Kirsher } 1097874aeea5SJeff Kirsher 1098874aeea5SJeff Kirsher pci_set_master(pci_dev); 1099874aeea5SJeff Kirsher 1100874aeea5SJeff Kirsher /* Set the PCI DMA mask. Try all possibilities from our 1101874aeea5SJeff Kirsher * genuine mask down to 32 bits, because some architectures 1102874aeea5SJeff Kirsher * (e.g. x86_64 with iommu_sac_force set) will allow 40 bit 1103874aeea5SJeff Kirsher * masks event though they reject 46 bit masks. 1104874aeea5SJeff Kirsher */ 1105874aeea5SJeff Kirsher while (dma_mask > 0x7fffffffUL) { 1106e9e01846SBen Hutchings if (pci_dma_supported(pci_dev, dma_mask)) { 1107e9e01846SBen Hutchings rc = pci_set_dma_mask(pci_dev, dma_mask); 1108e9e01846SBen Hutchings if (rc == 0) 1109874aeea5SJeff Kirsher break; 1110e9e01846SBen Hutchings } 1111874aeea5SJeff Kirsher dma_mask >>= 1; 1112874aeea5SJeff Kirsher } 1113874aeea5SJeff Kirsher if (rc) { 1114874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 1115874aeea5SJeff Kirsher "could not find a suitable DMA mask\n"); 1116874aeea5SJeff Kirsher goto fail2; 1117874aeea5SJeff Kirsher } 1118874aeea5SJeff Kirsher netif_dbg(efx, probe, efx->net_dev, 1119874aeea5SJeff Kirsher "using DMA mask %llx\n", (unsigned long long) dma_mask); 1120874aeea5SJeff Kirsher rc = pci_set_consistent_dma_mask(pci_dev, dma_mask); 1121874aeea5SJeff Kirsher if (rc) { 1122874aeea5SJeff Kirsher /* pci_set_consistent_dma_mask() is not *allowed* to 1123874aeea5SJeff Kirsher * fail with a mask that pci_set_dma_mask() accepted, 1124874aeea5SJeff Kirsher * but just in case... 1125874aeea5SJeff Kirsher */ 1126874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 1127874aeea5SJeff Kirsher "failed to set consistent DMA mask\n"); 1128874aeea5SJeff Kirsher goto fail2; 1129874aeea5SJeff Kirsher } 1130874aeea5SJeff Kirsher 1131874aeea5SJeff Kirsher efx->membase_phys = pci_resource_start(efx->pci_dev, EFX_MEM_BAR); 1132874aeea5SJeff Kirsher rc = pci_request_region(pci_dev, EFX_MEM_BAR, "sfc"); 1133874aeea5SJeff Kirsher if (rc) { 1134874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 1135874aeea5SJeff Kirsher "request for memory BAR failed\n"); 1136874aeea5SJeff Kirsher rc = -EIO; 1137874aeea5SJeff Kirsher goto fail3; 1138874aeea5SJeff Kirsher } 1139874aeea5SJeff Kirsher efx->membase = ioremap_nocache(efx->membase_phys, 1140874aeea5SJeff Kirsher efx->type->mem_map_size); 1141874aeea5SJeff Kirsher if (!efx->membase) { 1142874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 1143874aeea5SJeff Kirsher "could not map memory BAR at %llx+%x\n", 1144874aeea5SJeff Kirsher (unsigned long long)efx->membase_phys, 1145874aeea5SJeff Kirsher efx->type->mem_map_size); 1146874aeea5SJeff Kirsher rc = -ENOMEM; 1147874aeea5SJeff Kirsher goto fail4; 1148874aeea5SJeff Kirsher } 1149874aeea5SJeff Kirsher netif_dbg(efx, probe, efx->net_dev, 1150874aeea5SJeff Kirsher "memory BAR at %llx+%x (virtual %p)\n", 1151874aeea5SJeff Kirsher (unsigned long long)efx->membase_phys, 1152874aeea5SJeff Kirsher efx->type->mem_map_size, efx->membase); 1153874aeea5SJeff Kirsher 1154874aeea5SJeff Kirsher return 0; 1155874aeea5SJeff Kirsher 1156874aeea5SJeff Kirsher fail4: 1157874aeea5SJeff Kirsher pci_release_region(efx->pci_dev, EFX_MEM_BAR); 1158874aeea5SJeff Kirsher fail3: 1159874aeea5SJeff Kirsher efx->membase_phys = 0; 1160874aeea5SJeff Kirsher fail2: 1161874aeea5SJeff Kirsher pci_disable_device(efx->pci_dev); 1162874aeea5SJeff Kirsher fail1: 1163874aeea5SJeff Kirsher return rc; 1164874aeea5SJeff Kirsher } 1165874aeea5SJeff Kirsher 1166874aeea5SJeff Kirsher static void efx_fini_io(struct efx_nic *efx) 1167874aeea5SJeff Kirsher { 1168874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "shutting down I/O\n"); 1169874aeea5SJeff Kirsher 1170874aeea5SJeff Kirsher if (efx->membase) { 1171874aeea5SJeff Kirsher iounmap(efx->membase); 1172874aeea5SJeff Kirsher efx->membase = NULL; 1173874aeea5SJeff Kirsher } 1174874aeea5SJeff Kirsher 1175874aeea5SJeff Kirsher if (efx->membase_phys) { 1176874aeea5SJeff Kirsher pci_release_region(efx->pci_dev, EFX_MEM_BAR); 1177874aeea5SJeff Kirsher efx->membase_phys = 0; 1178874aeea5SJeff Kirsher } 1179874aeea5SJeff Kirsher 1180874aeea5SJeff Kirsher pci_disable_device(efx->pci_dev); 1181874aeea5SJeff Kirsher } 1182874aeea5SJeff Kirsher 1183a9a52506SBen Hutchings static unsigned int efx_wanted_parallelism(struct efx_nic *efx) 1184874aeea5SJeff Kirsher { 1185cdb08f8fSBen Hutchings cpumask_var_t thread_mask; 1186a16e5b24SBen Hutchings unsigned int count; 1187874aeea5SJeff Kirsher int cpu; 1188874aeea5SJeff Kirsher 1189cd2d5b52SBen Hutchings if (rss_cpus) { 1190cd2d5b52SBen Hutchings count = rss_cpus; 1191cd2d5b52SBen Hutchings } else { 1192cdb08f8fSBen Hutchings if (unlikely(!zalloc_cpumask_var(&thread_mask, GFP_KERNEL))) { 1193a9a52506SBen Hutchings netif_warn(efx, probe, efx->net_dev, 1194a9a52506SBen Hutchings "RSS disabled due to allocation failure\n"); 1195874aeea5SJeff Kirsher return 1; 1196874aeea5SJeff Kirsher } 1197874aeea5SJeff Kirsher 1198874aeea5SJeff Kirsher count = 0; 1199874aeea5SJeff Kirsher for_each_online_cpu(cpu) { 1200cdb08f8fSBen Hutchings if (!cpumask_test_cpu(cpu, thread_mask)) { 1201874aeea5SJeff Kirsher ++count; 1202cdb08f8fSBen Hutchings cpumask_or(thread_mask, thread_mask, 1203cdb08f8fSBen Hutchings topology_thread_cpumask(cpu)); 1204874aeea5SJeff Kirsher } 1205874aeea5SJeff Kirsher } 1206874aeea5SJeff Kirsher 1207cdb08f8fSBen Hutchings free_cpumask_var(thread_mask); 1208cd2d5b52SBen Hutchings } 1209cd2d5b52SBen Hutchings 1210cd2d5b52SBen Hutchings /* If RSS is requested for the PF *and* VFs then we can't write RSS 1211cd2d5b52SBen Hutchings * table entries that are inaccessible to VFs 1212cd2d5b52SBen Hutchings */ 1213cd2d5b52SBen Hutchings if (efx_sriov_wanted(efx) && efx_vf_size(efx) > 1 && 1214cd2d5b52SBen Hutchings count > efx_vf_size(efx)) { 1215cd2d5b52SBen Hutchings netif_warn(efx, probe, efx->net_dev, 1216cd2d5b52SBen Hutchings "Reducing number of RSS channels from %u to %u for " 1217cd2d5b52SBen Hutchings "VF support. Increase vf-msix-limit to use more " 1218cd2d5b52SBen Hutchings "channels on the PF.\n", 1219cd2d5b52SBen Hutchings count, efx_vf_size(efx)); 1220cd2d5b52SBen Hutchings count = efx_vf_size(efx); 1221cd2d5b52SBen Hutchings } 1222cd2d5b52SBen Hutchings 1223874aeea5SJeff Kirsher return count; 1224874aeea5SJeff Kirsher } 1225874aeea5SJeff Kirsher 1226874aeea5SJeff Kirsher static int 1227874aeea5SJeff Kirsher efx_init_rx_cpu_rmap(struct efx_nic *efx, struct msix_entry *xentries) 1228874aeea5SJeff Kirsher { 1229874aeea5SJeff Kirsher #ifdef CONFIG_RFS_ACCEL 1230a16e5b24SBen Hutchings unsigned int i; 1231a16e5b24SBen Hutchings int rc; 1232874aeea5SJeff Kirsher 1233874aeea5SJeff Kirsher efx->net_dev->rx_cpu_rmap = alloc_irq_cpu_rmap(efx->n_rx_channels); 1234874aeea5SJeff Kirsher if (!efx->net_dev->rx_cpu_rmap) 1235874aeea5SJeff Kirsher return -ENOMEM; 1236874aeea5SJeff Kirsher for (i = 0; i < efx->n_rx_channels; i++) { 1237874aeea5SJeff Kirsher rc = irq_cpu_rmap_add(efx->net_dev->rx_cpu_rmap, 1238874aeea5SJeff Kirsher xentries[i].vector); 1239874aeea5SJeff Kirsher if (rc) { 1240874aeea5SJeff Kirsher free_irq_cpu_rmap(efx->net_dev->rx_cpu_rmap); 1241874aeea5SJeff Kirsher efx->net_dev->rx_cpu_rmap = NULL; 1242874aeea5SJeff Kirsher return rc; 1243874aeea5SJeff Kirsher } 1244874aeea5SJeff Kirsher } 1245874aeea5SJeff Kirsher #endif 1246874aeea5SJeff Kirsher return 0; 1247874aeea5SJeff Kirsher } 1248874aeea5SJeff Kirsher 1249874aeea5SJeff Kirsher /* Probe the number and type of interrupts we are able to obtain, and 1250874aeea5SJeff Kirsher * the resulting numbers of channels and RX queues. 1251874aeea5SJeff Kirsher */ 1252874aeea5SJeff Kirsher static int efx_probe_interrupts(struct efx_nic *efx) 1253874aeea5SJeff Kirsher { 1254a16e5b24SBen Hutchings unsigned int max_channels = 1255a16e5b24SBen Hutchings min(efx->type->phys_addr_channels, EFX_MAX_CHANNELS); 12567f967c01SBen Hutchings unsigned int extra_channels = 0; 12577f967c01SBen Hutchings unsigned int i, j; 1258a16e5b24SBen Hutchings int rc; 1259874aeea5SJeff Kirsher 12607f967c01SBen Hutchings for (i = 0; i < EFX_MAX_EXTRA_CHANNELS; i++) 12617f967c01SBen Hutchings if (efx->extra_channel_type[i]) 12627f967c01SBen Hutchings ++extra_channels; 12637f967c01SBen Hutchings 1264874aeea5SJeff Kirsher if (efx->interrupt_mode == EFX_INT_MODE_MSIX) { 1265874aeea5SJeff Kirsher struct msix_entry xentries[EFX_MAX_CHANNELS]; 1266a16e5b24SBen Hutchings unsigned int n_channels; 1267874aeea5SJeff Kirsher 1268a9a52506SBen Hutchings n_channels = efx_wanted_parallelism(efx); 1269874aeea5SJeff Kirsher if (separate_tx_channels) 1270874aeea5SJeff Kirsher n_channels *= 2; 12717f967c01SBen Hutchings n_channels += extra_channels; 1272874aeea5SJeff Kirsher n_channels = min(n_channels, max_channels); 1273874aeea5SJeff Kirsher 1274874aeea5SJeff Kirsher for (i = 0; i < n_channels; i++) 1275874aeea5SJeff Kirsher xentries[i].entry = i; 1276874aeea5SJeff Kirsher rc = pci_enable_msix(efx->pci_dev, xentries, n_channels); 1277874aeea5SJeff Kirsher if (rc > 0) { 1278874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, 1279874aeea5SJeff Kirsher "WARNING: Insufficient MSI-X vectors" 1280a16e5b24SBen Hutchings " available (%d < %u).\n", rc, n_channels); 1281874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, 1282874aeea5SJeff Kirsher "WARNING: Performance may be reduced.\n"); 1283874aeea5SJeff Kirsher EFX_BUG_ON_PARANOID(rc >= n_channels); 1284874aeea5SJeff Kirsher n_channels = rc; 1285874aeea5SJeff Kirsher rc = pci_enable_msix(efx->pci_dev, xentries, 1286874aeea5SJeff Kirsher n_channels); 1287874aeea5SJeff Kirsher } 1288874aeea5SJeff Kirsher 1289874aeea5SJeff Kirsher if (rc == 0) { 1290874aeea5SJeff Kirsher efx->n_channels = n_channels; 12917f967c01SBen Hutchings if (n_channels > extra_channels) 12927f967c01SBen Hutchings n_channels -= extra_channels; 1293874aeea5SJeff Kirsher if (separate_tx_channels) { 12947f967c01SBen Hutchings efx->n_tx_channels = max(n_channels / 2, 1U); 12957f967c01SBen Hutchings efx->n_rx_channels = max(n_channels - 12967f967c01SBen Hutchings efx->n_tx_channels, 12977f967c01SBen Hutchings 1U); 1298874aeea5SJeff Kirsher } else { 12997f967c01SBen Hutchings efx->n_tx_channels = n_channels; 13007f967c01SBen Hutchings efx->n_rx_channels = n_channels; 1301874aeea5SJeff Kirsher } 1302874aeea5SJeff Kirsher rc = efx_init_rx_cpu_rmap(efx, xentries); 1303874aeea5SJeff Kirsher if (rc) { 1304874aeea5SJeff Kirsher pci_disable_msix(efx->pci_dev); 1305874aeea5SJeff Kirsher return rc; 1306874aeea5SJeff Kirsher } 13077f967c01SBen Hutchings for (i = 0; i < efx->n_channels; i++) 1308874aeea5SJeff Kirsher efx_get_channel(efx, i)->irq = 1309874aeea5SJeff Kirsher xentries[i].vector; 1310874aeea5SJeff Kirsher } else { 1311874aeea5SJeff Kirsher /* Fall back to single channel MSI */ 1312874aeea5SJeff Kirsher efx->interrupt_mode = EFX_INT_MODE_MSI; 1313874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, 1314874aeea5SJeff Kirsher "could not enable MSI-X\n"); 1315874aeea5SJeff Kirsher } 1316874aeea5SJeff Kirsher } 1317874aeea5SJeff Kirsher 1318874aeea5SJeff Kirsher /* Try single interrupt MSI */ 1319874aeea5SJeff Kirsher if (efx->interrupt_mode == EFX_INT_MODE_MSI) { 1320874aeea5SJeff Kirsher efx->n_channels = 1; 1321874aeea5SJeff Kirsher efx->n_rx_channels = 1; 1322874aeea5SJeff Kirsher efx->n_tx_channels = 1; 1323874aeea5SJeff Kirsher rc = pci_enable_msi(efx->pci_dev); 1324874aeea5SJeff Kirsher if (rc == 0) { 1325874aeea5SJeff Kirsher efx_get_channel(efx, 0)->irq = efx->pci_dev->irq; 1326874aeea5SJeff Kirsher } else { 1327874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, 1328874aeea5SJeff Kirsher "could not enable MSI\n"); 1329874aeea5SJeff Kirsher efx->interrupt_mode = EFX_INT_MODE_LEGACY; 1330874aeea5SJeff Kirsher } 1331874aeea5SJeff Kirsher } 1332874aeea5SJeff Kirsher 1333874aeea5SJeff Kirsher /* Assume legacy interrupts */ 1334874aeea5SJeff Kirsher if (efx->interrupt_mode == EFX_INT_MODE_LEGACY) { 1335874aeea5SJeff Kirsher efx->n_channels = 1 + (separate_tx_channels ? 1 : 0); 1336874aeea5SJeff Kirsher efx->n_rx_channels = 1; 1337874aeea5SJeff Kirsher efx->n_tx_channels = 1; 1338874aeea5SJeff Kirsher efx->legacy_irq = efx->pci_dev->irq; 1339874aeea5SJeff Kirsher } 1340874aeea5SJeff Kirsher 13417f967c01SBen Hutchings /* Assign extra channels if possible */ 13427f967c01SBen Hutchings j = efx->n_channels; 13437f967c01SBen Hutchings for (i = 0; i < EFX_MAX_EXTRA_CHANNELS; i++) { 13447f967c01SBen Hutchings if (!efx->extra_channel_type[i]) 13457f967c01SBen Hutchings continue; 13467f967c01SBen Hutchings if (efx->interrupt_mode != EFX_INT_MODE_MSIX || 13477f967c01SBen Hutchings efx->n_channels <= extra_channels) { 13487f967c01SBen Hutchings efx->extra_channel_type[i]->handle_no_channel(efx); 13497f967c01SBen Hutchings } else { 13507f967c01SBen Hutchings --j; 13517f967c01SBen Hutchings efx_get_channel(efx, j)->type = 13527f967c01SBen Hutchings efx->extra_channel_type[i]; 13537f967c01SBen Hutchings } 13547f967c01SBen Hutchings } 13557f967c01SBen Hutchings 1356cd2d5b52SBen Hutchings /* RSS might be usable on VFs even if it is disabled on the PF */ 1357cd2d5b52SBen Hutchings efx->rss_spread = (efx->n_rx_channels > 1 ? 1358cd2d5b52SBen Hutchings efx->n_rx_channels : efx_vf_size(efx)); 1359cd2d5b52SBen Hutchings 1360874aeea5SJeff Kirsher return 0; 1361874aeea5SJeff Kirsher } 1362874aeea5SJeff Kirsher 13639f2cb71cSBen Hutchings /* Enable interrupts, then probe and start the event queues */ 13647f967c01SBen Hutchings static void efx_start_interrupts(struct efx_nic *efx, bool may_keep_eventq) 13659f2cb71cSBen Hutchings { 13669f2cb71cSBen Hutchings struct efx_channel *channel; 13679f2cb71cSBen Hutchings 13689f2cb71cSBen Hutchings if (efx->legacy_irq) 13699f2cb71cSBen Hutchings efx->legacy_irq_enabled = true; 13709f2cb71cSBen Hutchings efx_nic_enable_interrupts(efx); 13719f2cb71cSBen Hutchings 13729f2cb71cSBen Hutchings efx_for_each_channel(channel, efx) { 13737f967c01SBen Hutchings if (!channel->type->keep_eventq || !may_keep_eventq) 13749f2cb71cSBen Hutchings efx_init_eventq(channel); 13759f2cb71cSBen Hutchings efx_start_eventq(channel); 13769f2cb71cSBen Hutchings } 13779f2cb71cSBen Hutchings 13789f2cb71cSBen Hutchings efx_mcdi_mode_event(efx); 13799f2cb71cSBen Hutchings } 13809f2cb71cSBen Hutchings 13817f967c01SBen Hutchings static void efx_stop_interrupts(struct efx_nic *efx, bool may_keep_eventq) 13829f2cb71cSBen Hutchings { 13839f2cb71cSBen Hutchings struct efx_channel *channel; 13849f2cb71cSBen Hutchings 13859f2cb71cSBen Hutchings efx_mcdi_mode_poll(efx); 13869f2cb71cSBen Hutchings 13879f2cb71cSBen Hutchings efx_nic_disable_interrupts(efx); 13889f2cb71cSBen Hutchings if (efx->legacy_irq) { 13899f2cb71cSBen Hutchings synchronize_irq(efx->legacy_irq); 13909f2cb71cSBen Hutchings efx->legacy_irq_enabled = false; 13919f2cb71cSBen Hutchings } 13929f2cb71cSBen Hutchings 13939f2cb71cSBen Hutchings efx_for_each_channel(channel, efx) { 13949f2cb71cSBen Hutchings if (channel->irq) 13959f2cb71cSBen Hutchings synchronize_irq(channel->irq); 13969f2cb71cSBen Hutchings 13979f2cb71cSBen Hutchings efx_stop_eventq(channel); 13987f967c01SBen Hutchings if (!channel->type->keep_eventq || !may_keep_eventq) 13999f2cb71cSBen Hutchings efx_fini_eventq(channel); 14009f2cb71cSBen Hutchings } 14019f2cb71cSBen Hutchings } 14029f2cb71cSBen Hutchings 1403874aeea5SJeff Kirsher static void efx_remove_interrupts(struct efx_nic *efx) 1404874aeea5SJeff Kirsher { 1405874aeea5SJeff Kirsher struct efx_channel *channel; 1406874aeea5SJeff Kirsher 1407874aeea5SJeff Kirsher /* Remove MSI/MSI-X interrupts */ 1408874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) 1409874aeea5SJeff Kirsher channel->irq = 0; 1410874aeea5SJeff Kirsher pci_disable_msi(efx->pci_dev); 1411874aeea5SJeff Kirsher pci_disable_msix(efx->pci_dev); 1412874aeea5SJeff Kirsher 1413874aeea5SJeff Kirsher /* Remove legacy interrupt */ 1414874aeea5SJeff Kirsher efx->legacy_irq = 0; 1415874aeea5SJeff Kirsher } 1416874aeea5SJeff Kirsher 1417874aeea5SJeff Kirsher static void efx_set_channels(struct efx_nic *efx) 1418874aeea5SJeff Kirsher { 1419874aeea5SJeff Kirsher struct efx_channel *channel; 1420874aeea5SJeff Kirsher struct efx_tx_queue *tx_queue; 1421874aeea5SJeff Kirsher 1422874aeea5SJeff Kirsher efx->tx_channel_offset = 1423874aeea5SJeff Kirsher separate_tx_channels ? efx->n_channels - efx->n_tx_channels : 0; 1424874aeea5SJeff Kirsher 1425874aeea5SJeff Kirsher /* We need to adjust the TX queue numbers if we have separate 1426874aeea5SJeff Kirsher * RX-only and TX-only channels. 1427874aeea5SJeff Kirsher */ 1428874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) { 1429874aeea5SJeff Kirsher efx_for_each_channel_tx_queue(tx_queue, channel) 1430874aeea5SJeff Kirsher tx_queue->queue -= (efx->tx_channel_offset * 1431874aeea5SJeff Kirsher EFX_TXQ_TYPES); 1432874aeea5SJeff Kirsher } 1433874aeea5SJeff Kirsher } 1434874aeea5SJeff Kirsher 1435874aeea5SJeff Kirsher static int efx_probe_nic(struct efx_nic *efx) 1436874aeea5SJeff Kirsher { 1437874aeea5SJeff Kirsher size_t i; 1438874aeea5SJeff Kirsher int rc; 1439874aeea5SJeff Kirsher 1440874aeea5SJeff Kirsher netif_dbg(efx, probe, efx->net_dev, "creating NIC\n"); 1441874aeea5SJeff Kirsher 1442874aeea5SJeff Kirsher /* Carry out hardware-type specific initialisation */ 1443874aeea5SJeff Kirsher rc = efx->type->probe(efx); 1444874aeea5SJeff Kirsher if (rc) 1445874aeea5SJeff Kirsher return rc; 1446874aeea5SJeff Kirsher 1447874aeea5SJeff Kirsher /* Determine the number of channels and queues by trying to hook 1448874aeea5SJeff Kirsher * in MSI-X interrupts. */ 1449874aeea5SJeff Kirsher rc = efx_probe_interrupts(efx); 1450874aeea5SJeff Kirsher if (rc) 1451874aeea5SJeff Kirsher goto fail; 1452874aeea5SJeff Kirsher 145328e47c49SBen Hutchings efx->type->dimension_resources(efx); 145428e47c49SBen Hutchings 1455874aeea5SJeff Kirsher if (efx->n_channels > 1) 1456874aeea5SJeff Kirsher get_random_bytes(&efx->rx_hash_key, sizeof(efx->rx_hash_key)); 1457874aeea5SJeff Kirsher for (i = 0; i < ARRAY_SIZE(efx->rx_indir_table); i++) 1458278bc429SBen Hutchings efx->rx_indir_table[i] = 1459cd2d5b52SBen Hutchings ethtool_rxfh_indir_default(i, efx->rss_spread); 1460874aeea5SJeff Kirsher 1461874aeea5SJeff Kirsher efx_set_channels(efx); 1462874aeea5SJeff Kirsher netif_set_real_num_tx_queues(efx->net_dev, efx->n_tx_channels); 1463874aeea5SJeff Kirsher netif_set_real_num_rx_queues(efx->net_dev, efx->n_rx_channels); 1464874aeea5SJeff Kirsher 1465874aeea5SJeff Kirsher /* Initialise the interrupt moderation settings */ 14669e393b30SBen Hutchings efx_init_irq_moderation(efx, tx_irq_mod_usec, rx_irq_mod_usec, true, 14679e393b30SBen Hutchings true); 1468874aeea5SJeff Kirsher 1469874aeea5SJeff Kirsher return 0; 1470874aeea5SJeff Kirsher 1471874aeea5SJeff Kirsher fail: 1472874aeea5SJeff Kirsher efx->type->remove(efx); 1473874aeea5SJeff Kirsher return rc; 1474874aeea5SJeff Kirsher } 1475874aeea5SJeff Kirsher 1476874aeea5SJeff Kirsher static void efx_remove_nic(struct efx_nic *efx) 1477874aeea5SJeff Kirsher { 1478874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "destroying NIC\n"); 1479874aeea5SJeff Kirsher 1480874aeea5SJeff Kirsher efx_remove_interrupts(efx); 1481874aeea5SJeff Kirsher efx->type->remove(efx); 1482874aeea5SJeff Kirsher } 1483874aeea5SJeff Kirsher 1484874aeea5SJeff Kirsher /************************************************************************** 1485874aeea5SJeff Kirsher * 1486874aeea5SJeff Kirsher * NIC startup/shutdown 1487874aeea5SJeff Kirsher * 1488874aeea5SJeff Kirsher *************************************************************************/ 1489874aeea5SJeff Kirsher 1490874aeea5SJeff Kirsher static int efx_probe_all(struct efx_nic *efx) 1491874aeea5SJeff Kirsher { 1492874aeea5SJeff Kirsher int rc; 1493874aeea5SJeff Kirsher 1494874aeea5SJeff Kirsher rc = efx_probe_nic(efx); 1495874aeea5SJeff Kirsher if (rc) { 1496874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, "failed to create NIC\n"); 1497874aeea5SJeff Kirsher goto fail1; 1498874aeea5SJeff Kirsher } 1499874aeea5SJeff Kirsher 1500874aeea5SJeff Kirsher rc = efx_probe_port(efx); 1501874aeea5SJeff Kirsher if (rc) { 1502874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, "failed to create port\n"); 1503874aeea5SJeff Kirsher goto fail2; 1504874aeea5SJeff Kirsher } 1505874aeea5SJeff Kirsher 1506874aeea5SJeff Kirsher efx->rxq_entries = efx->txq_entries = EFX_DEFAULT_DMAQ_SIZE; 1507874aeea5SJeff Kirsher 1508874aeea5SJeff Kirsher rc = efx_probe_filters(efx); 1509874aeea5SJeff Kirsher if (rc) { 1510874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 1511874aeea5SJeff Kirsher "failed to create filter tables\n"); 15127f967c01SBen Hutchings goto fail3; 1513874aeea5SJeff Kirsher } 1514874aeea5SJeff Kirsher 15157f967c01SBen Hutchings rc = efx_probe_channels(efx); 15167f967c01SBen Hutchings if (rc) 15177f967c01SBen Hutchings goto fail4; 15187f967c01SBen Hutchings 1519874aeea5SJeff Kirsher return 0; 1520874aeea5SJeff Kirsher 1521874aeea5SJeff Kirsher fail4: 15227f967c01SBen Hutchings efx_remove_filters(efx); 1523874aeea5SJeff Kirsher fail3: 1524874aeea5SJeff Kirsher efx_remove_port(efx); 1525874aeea5SJeff Kirsher fail2: 1526874aeea5SJeff Kirsher efx_remove_nic(efx); 1527874aeea5SJeff Kirsher fail1: 1528874aeea5SJeff Kirsher return rc; 1529874aeea5SJeff Kirsher } 1530874aeea5SJeff Kirsher 15319f2cb71cSBen Hutchings /* Called after previous invocation(s) of efx_stop_all, restarts the port, 15329f2cb71cSBen Hutchings * kernel transmit queues and NAPI processing, and ensures that the port is 15339f2cb71cSBen Hutchings * scheduled to be reconfigured. This function is safe to call multiple 15349f2cb71cSBen Hutchings * times when the NIC is in any state. 15359f2cb71cSBen Hutchings */ 1536874aeea5SJeff Kirsher static void efx_start_all(struct efx_nic *efx) 1537874aeea5SJeff Kirsher { 1538874aeea5SJeff Kirsher EFX_ASSERT_RESET_SERIALISED(efx); 1539874aeea5SJeff Kirsher 1540874aeea5SJeff Kirsher /* Check that it is appropriate to restart the interface. All 1541874aeea5SJeff Kirsher * of these flags are safe to read under just the rtnl lock */ 1542874aeea5SJeff Kirsher if (efx->port_enabled) 1543874aeea5SJeff Kirsher return; 1544874aeea5SJeff Kirsher if ((efx->state != STATE_RUNNING) && (efx->state != STATE_INIT)) 1545874aeea5SJeff Kirsher return; 154673ba7b68SBen Hutchings if (!netif_running(efx->net_dev)) 1547874aeea5SJeff Kirsher return; 1548874aeea5SJeff Kirsher 1549874aeea5SJeff Kirsher efx_start_port(efx); 15509f2cb71cSBen Hutchings efx_start_datapath(efx); 1551874aeea5SJeff Kirsher 1552874aeea5SJeff Kirsher /* Start the hardware monitor if there is one. Otherwise (we're link 1553874aeea5SJeff Kirsher * event driven), we have to poll the PHY because after an event queue 1554874aeea5SJeff Kirsher * flush, we could have a missed a link state change */ 1555874aeea5SJeff Kirsher if (efx->type->monitor != NULL) { 1556874aeea5SJeff Kirsher queue_delayed_work(efx->workqueue, &efx->monitor_work, 1557874aeea5SJeff Kirsher efx_monitor_interval); 1558874aeea5SJeff Kirsher } else { 1559874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 1560874aeea5SJeff Kirsher if (efx->phy_op->poll(efx)) 1561874aeea5SJeff Kirsher efx_link_status_changed(efx); 1562874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 1563874aeea5SJeff Kirsher } 1564874aeea5SJeff Kirsher 1565874aeea5SJeff Kirsher efx->type->start_stats(efx); 1566874aeea5SJeff Kirsher } 1567874aeea5SJeff Kirsher 1568874aeea5SJeff Kirsher /* Flush all delayed work. Should only be called when no more delayed work 1569874aeea5SJeff Kirsher * will be scheduled. This doesn't flush pending online resets (efx_reset), 1570874aeea5SJeff Kirsher * since we're holding the rtnl_lock at this point. */ 1571874aeea5SJeff Kirsher static void efx_flush_all(struct efx_nic *efx) 1572874aeea5SJeff Kirsher { 1573dd40781eSBen Hutchings /* Make sure the hardware monitor and event self-test are stopped */ 1574874aeea5SJeff Kirsher cancel_delayed_work_sync(&efx->monitor_work); 1575dd40781eSBen Hutchings efx_selftest_async_cancel(efx); 1576874aeea5SJeff Kirsher /* Stop scheduled port reconfigurations */ 1577874aeea5SJeff Kirsher cancel_work_sync(&efx->mac_work); 1578874aeea5SJeff Kirsher } 1579874aeea5SJeff Kirsher 1580874aeea5SJeff Kirsher /* Quiesce hardware and software without bringing the link down. 1581874aeea5SJeff Kirsher * Safe to call multiple times, when the nic and interface is in any 1582874aeea5SJeff Kirsher * state. The caller is guaranteed to subsequently be in a position 1583874aeea5SJeff Kirsher * to modify any hardware and software state they see fit without 1584874aeea5SJeff Kirsher * taking locks. */ 1585874aeea5SJeff Kirsher static void efx_stop_all(struct efx_nic *efx) 1586874aeea5SJeff Kirsher { 1587874aeea5SJeff Kirsher EFX_ASSERT_RESET_SERIALISED(efx); 1588874aeea5SJeff Kirsher 1589874aeea5SJeff Kirsher /* port_enabled can be read safely under the rtnl lock */ 1590874aeea5SJeff Kirsher if (!efx->port_enabled) 1591874aeea5SJeff Kirsher return; 1592874aeea5SJeff Kirsher 1593874aeea5SJeff Kirsher efx->type->stop_stats(efx); 1594874aeea5SJeff Kirsher efx_stop_port(efx); 1595874aeea5SJeff Kirsher 1596874aeea5SJeff Kirsher /* Flush efx_mac_work(), refill_workqueue, monitor_work */ 1597874aeea5SJeff Kirsher efx_flush_all(efx); 1598874aeea5SJeff Kirsher 1599874aeea5SJeff Kirsher /* Stop the kernel transmit interface late, so the watchdog 1600874aeea5SJeff Kirsher * timer isn't ticking over the flush */ 16019f2cb71cSBen Hutchings netif_tx_disable(efx->net_dev); 16029f2cb71cSBen Hutchings 16039f2cb71cSBen Hutchings efx_stop_datapath(efx); 1604874aeea5SJeff Kirsher } 1605874aeea5SJeff Kirsher 1606874aeea5SJeff Kirsher static void efx_remove_all(struct efx_nic *efx) 1607874aeea5SJeff Kirsher { 1608874aeea5SJeff Kirsher efx_remove_channels(efx); 16097f967c01SBen Hutchings efx_remove_filters(efx); 1610874aeea5SJeff Kirsher efx_remove_port(efx); 1611874aeea5SJeff Kirsher efx_remove_nic(efx); 1612874aeea5SJeff Kirsher } 1613874aeea5SJeff Kirsher 1614874aeea5SJeff Kirsher /************************************************************************** 1615874aeea5SJeff Kirsher * 1616874aeea5SJeff Kirsher * Interrupt moderation 1617874aeea5SJeff Kirsher * 1618874aeea5SJeff Kirsher **************************************************************************/ 1619874aeea5SJeff Kirsher 1620cc180b69SBen Hutchings static unsigned int irq_mod_ticks(unsigned int usecs, unsigned int quantum_ns) 1621874aeea5SJeff Kirsher { 1622b548f976SBen Hutchings if (usecs == 0) 1623b548f976SBen Hutchings return 0; 1624cc180b69SBen Hutchings if (usecs * 1000 < quantum_ns) 1625874aeea5SJeff Kirsher return 1; /* never round down to 0 */ 1626cc180b69SBen Hutchings return usecs * 1000 / quantum_ns; 1627874aeea5SJeff Kirsher } 1628874aeea5SJeff Kirsher 1629874aeea5SJeff Kirsher /* Set interrupt moderation parameters */ 16309e393b30SBen Hutchings int efx_init_irq_moderation(struct efx_nic *efx, unsigned int tx_usecs, 16319e393b30SBen Hutchings unsigned int rx_usecs, bool rx_adaptive, 16329e393b30SBen Hutchings bool rx_may_override_tx) 1633874aeea5SJeff Kirsher { 1634874aeea5SJeff Kirsher struct efx_channel *channel; 1635cc180b69SBen Hutchings unsigned int irq_mod_max = DIV_ROUND_UP(efx->type->timer_period_max * 1636cc180b69SBen Hutchings efx->timer_quantum_ns, 1637cc180b69SBen Hutchings 1000); 1638cc180b69SBen Hutchings unsigned int tx_ticks; 1639cc180b69SBen Hutchings unsigned int rx_ticks; 1640874aeea5SJeff Kirsher 1641874aeea5SJeff Kirsher EFX_ASSERT_RESET_SERIALISED(efx); 1642874aeea5SJeff Kirsher 1643cc180b69SBen Hutchings if (tx_usecs > irq_mod_max || rx_usecs > irq_mod_max) 16449e393b30SBen Hutchings return -EINVAL; 16459e393b30SBen Hutchings 1646cc180b69SBen Hutchings tx_ticks = irq_mod_ticks(tx_usecs, efx->timer_quantum_ns); 1647cc180b69SBen Hutchings rx_ticks = irq_mod_ticks(rx_usecs, efx->timer_quantum_ns); 1648cc180b69SBen Hutchings 16499e393b30SBen Hutchings if (tx_ticks != rx_ticks && efx->tx_channel_offset == 0 && 16509e393b30SBen Hutchings !rx_may_override_tx) { 16519e393b30SBen Hutchings netif_err(efx, drv, efx->net_dev, "Channels are shared. " 16529e393b30SBen Hutchings "RX and TX IRQ moderation must be equal\n"); 16539e393b30SBen Hutchings return -EINVAL; 16549e393b30SBen Hutchings } 16559e393b30SBen Hutchings 1656874aeea5SJeff Kirsher efx->irq_rx_adaptive = rx_adaptive; 1657874aeea5SJeff Kirsher efx->irq_rx_moderation = rx_ticks; 1658874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) { 1659874aeea5SJeff Kirsher if (efx_channel_has_rx_queue(channel)) 1660874aeea5SJeff Kirsher channel->irq_moderation = rx_ticks; 1661874aeea5SJeff Kirsher else if (efx_channel_has_tx_queues(channel)) 1662874aeea5SJeff Kirsher channel->irq_moderation = tx_ticks; 1663874aeea5SJeff Kirsher } 16649e393b30SBen Hutchings 16659e393b30SBen Hutchings return 0; 1666874aeea5SJeff Kirsher } 1667874aeea5SJeff Kirsher 1668a0c4faf5SBen Hutchings void efx_get_irq_moderation(struct efx_nic *efx, unsigned int *tx_usecs, 1669a0c4faf5SBen Hutchings unsigned int *rx_usecs, bool *rx_adaptive) 1670a0c4faf5SBen Hutchings { 1671cc180b69SBen Hutchings /* We must round up when converting ticks to microseconds 1672cc180b69SBen Hutchings * because we round down when converting the other way. 1673cc180b69SBen Hutchings */ 1674cc180b69SBen Hutchings 1675a0c4faf5SBen Hutchings *rx_adaptive = efx->irq_rx_adaptive; 1676cc180b69SBen Hutchings *rx_usecs = DIV_ROUND_UP(efx->irq_rx_moderation * 1677cc180b69SBen Hutchings efx->timer_quantum_ns, 1678cc180b69SBen Hutchings 1000); 1679a0c4faf5SBen Hutchings 1680a0c4faf5SBen Hutchings /* If channels are shared between RX and TX, so is IRQ 1681a0c4faf5SBen Hutchings * moderation. Otherwise, IRQ moderation is the same for all 1682a0c4faf5SBen Hutchings * TX channels and is not adaptive. 1683a0c4faf5SBen Hutchings */ 1684a0c4faf5SBen Hutchings if (efx->tx_channel_offset == 0) 1685a0c4faf5SBen Hutchings *tx_usecs = *rx_usecs; 1686a0c4faf5SBen Hutchings else 1687cc180b69SBen Hutchings *tx_usecs = DIV_ROUND_UP( 1688a0c4faf5SBen Hutchings efx->channel[efx->tx_channel_offset]->irq_moderation * 1689cc180b69SBen Hutchings efx->timer_quantum_ns, 1690cc180b69SBen Hutchings 1000); 1691a0c4faf5SBen Hutchings } 1692a0c4faf5SBen Hutchings 1693874aeea5SJeff Kirsher /************************************************************************** 1694874aeea5SJeff Kirsher * 1695874aeea5SJeff Kirsher * Hardware monitor 1696874aeea5SJeff Kirsher * 1697874aeea5SJeff Kirsher **************************************************************************/ 1698874aeea5SJeff Kirsher 1699874aeea5SJeff Kirsher /* Run periodically off the general workqueue */ 1700874aeea5SJeff Kirsher static void efx_monitor(struct work_struct *data) 1701874aeea5SJeff Kirsher { 1702874aeea5SJeff Kirsher struct efx_nic *efx = container_of(data, struct efx_nic, 1703874aeea5SJeff Kirsher monitor_work.work); 1704874aeea5SJeff Kirsher 1705874aeea5SJeff Kirsher netif_vdbg(efx, timer, efx->net_dev, 1706874aeea5SJeff Kirsher "hardware monitor executing on CPU %d\n", 1707874aeea5SJeff Kirsher raw_smp_processor_id()); 1708874aeea5SJeff Kirsher BUG_ON(efx->type->monitor == NULL); 1709874aeea5SJeff Kirsher 1710874aeea5SJeff Kirsher /* If the mac_lock is already held then it is likely a port 1711874aeea5SJeff Kirsher * reconfiguration is already in place, which will likely do 1712874aeea5SJeff Kirsher * most of the work of monitor() anyway. */ 1713874aeea5SJeff Kirsher if (mutex_trylock(&efx->mac_lock)) { 1714874aeea5SJeff Kirsher if (efx->port_enabled) 1715874aeea5SJeff Kirsher efx->type->monitor(efx); 1716874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 1717874aeea5SJeff Kirsher } 1718874aeea5SJeff Kirsher 1719874aeea5SJeff Kirsher queue_delayed_work(efx->workqueue, &efx->monitor_work, 1720874aeea5SJeff Kirsher efx_monitor_interval); 1721874aeea5SJeff Kirsher } 1722874aeea5SJeff Kirsher 1723874aeea5SJeff Kirsher /************************************************************************** 1724874aeea5SJeff Kirsher * 1725874aeea5SJeff Kirsher * ioctls 1726874aeea5SJeff Kirsher * 1727874aeea5SJeff Kirsher *************************************************************************/ 1728874aeea5SJeff Kirsher 1729874aeea5SJeff Kirsher /* Net device ioctl 1730874aeea5SJeff Kirsher * Context: process, rtnl_lock() held. 1731874aeea5SJeff Kirsher */ 1732874aeea5SJeff Kirsher static int efx_ioctl(struct net_device *net_dev, struct ifreq *ifr, int cmd) 1733874aeea5SJeff Kirsher { 1734874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 1735874aeea5SJeff Kirsher struct mii_ioctl_data *data = if_mii(ifr); 1736874aeea5SJeff Kirsher 1737874aeea5SJeff Kirsher EFX_ASSERT_RESET_SERIALISED(efx); 1738874aeea5SJeff Kirsher 1739874aeea5SJeff Kirsher /* Convert phy_id from older PRTAD/DEVAD format */ 1740874aeea5SJeff Kirsher if ((cmd == SIOCGMIIREG || cmd == SIOCSMIIREG) && 1741874aeea5SJeff Kirsher (data->phy_id & 0xfc00) == 0x0400) 1742874aeea5SJeff Kirsher data->phy_id ^= MDIO_PHY_ID_C45 | 0x0400; 1743874aeea5SJeff Kirsher 1744874aeea5SJeff Kirsher return mdio_mii_ioctl(&efx->mdio, data, cmd); 1745874aeea5SJeff Kirsher } 1746874aeea5SJeff Kirsher 1747874aeea5SJeff Kirsher /************************************************************************** 1748874aeea5SJeff Kirsher * 1749874aeea5SJeff Kirsher * NAPI interface 1750874aeea5SJeff Kirsher * 1751874aeea5SJeff Kirsher **************************************************************************/ 1752874aeea5SJeff Kirsher 17537f967c01SBen Hutchings static void efx_init_napi_channel(struct efx_channel *channel) 1754874aeea5SJeff Kirsher { 17557f967c01SBen Hutchings struct efx_nic *efx = channel->efx; 1756874aeea5SJeff Kirsher 1757874aeea5SJeff Kirsher channel->napi_dev = efx->net_dev; 1758874aeea5SJeff Kirsher netif_napi_add(channel->napi_dev, &channel->napi_str, 1759874aeea5SJeff Kirsher efx_poll, napi_weight); 1760874aeea5SJeff Kirsher } 17617f967c01SBen Hutchings 17627f967c01SBen Hutchings static void efx_init_napi(struct efx_nic *efx) 17637f967c01SBen Hutchings { 17647f967c01SBen Hutchings struct efx_channel *channel; 17657f967c01SBen Hutchings 17667f967c01SBen Hutchings efx_for_each_channel(channel, efx) 17677f967c01SBen Hutchings efx_init_napi_channel(channel); 1768874aeea5SJeff Kirsher } 1769874aeea5SJeff Kirsher 1770874aeea5SJeff Kirsher static void efx_fini_napi_channel(struct efx_channel *channel) 1771874aeea5SJeff Kirsher { 1772874aeea5SJeff Kirsher if (channel->napi_dev) 1773874aeea5SJeff Kirsher netif_napi_del(&channel->napi_str); 1774874aeea5SJeff Kirsher channel->napi_dev = NULL; 1775874aeea5SJeff Kirsher } 1776874aeea5SJeff Kirsher 1777874aeea5SJeff Kirsher static void efx_fini_napi(struct efx_nic *efx) 1778874aeea5SJeff Kirsher { 1779874aeea5SJeff Kirsher struct efx_channel *channel; 1780874aeea5SJeff Kirsher 1781874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) 1782874aeea5SJeff Kirsher efx_fini_napi_channel(channel); 1783874aeea5SJeff Kirsher } 1784874aeea5SJeff Kirsher 1785874aeea5SJeff Kirsher /************************************************************************** 1786874aeea5SJeff Kirsher * 1787874aeea5SJeff Kirsher * Kernel netpoll interface 1788874aeea5SJeff Kirsher * 1789874aeea5SJeff Kirsher *************************************************************************/ 1790874aeea5SJeff Kirsher 1791874aeea5SJeff Kirsher #ifdef CONFIG_NET_POLL_CONTROLLER 1792874aeea5SJeff Kirsher 1793874aeea5SJeff Kirsher /* Although in the common case interrupts will be disabled, this is not 1794874aeea5SJeff Kirsher * guaranteed. However, all our work happens inside the NAPI callback, 1795874aeea5SJeff Kirsher * so no locking is required. 1796874aeea5SJeff Kirsher */ 1797874aeea5SJeff Kirsher static void efx_netpoll(struct net_device *net_dev) 1798874aeea5SJeff Kirsher { 1799874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 1800874aeea5SJeff Kirsher struct efx_channel *channel; 1801874aeea5SJeff Kirsher 1802874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) 1803874aeea5SJeff Kirsher efx_schedule_channel(channel); 1804874aeea5SJeff Kirsher } 1805874aeea5SJeff Kirsher 1806874aeea5SJeff Kirsher #endif 1807874aeea5SJeff Kirsher 1808874aeea5SJeff Kirsher /************************************************************************** 1809874aeea5SJeff Kirsher * 1810874aeea5SJeff Kirsher * Kernel net device interface 1811874aeea5SJeff Kirsher * 1812874aeea5SJeff Kirsher *************************************************************************/ 1813874aeea5SJeff Kirsher 1814874aeea5SJeff Kirsher /* Context: process, rtnl_lock() held. */ 1815874aeea5SJeff Kirsher static int efx_net_open(struct net_device *net_dev) 1816874aeea5SJeff Kirsher { 1817874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 1818874aeea5SJeff Kirsher EFX_ASSERT_RESET_SERIALISED(efx); 1819874aeea5SJeff Kirsher 1820874aeea5SJeff Kirsher netif_dbg(efx, ifup, efx->net_dev, "opening device on CPU %d\n", 1821874aeea5SJeff Kirsher raw_smp_processor_id()); 1822874aeea5SJeff Kirsher 1823874aeea5SJeff Kirsher if (efx->state == STATE_DISABLED) 1824874aeea5SJeff Kirsher return -EIO; 1825874aeea5SJeff Kirsher if (efx->phy_mode & PHY_MODE_SPECIAL) 1826874aeea5SJeff Kirsher return -EBUSY; 1827874aeea5SJeff Kirsher if (efx_mcdi_poll_reboot(efx) && efx_reset(efx, RESET_TYPE_ALL)) 1828874aeea5SJeff Kirsher return -EIO; 1829874aeea5SJeff Kirsher 1830874aeea5SJeff Kirsher /* Notify the kernel of the link state polled during driver load, 1831874aeea5SJeff Kirsher * before the monitor starts running */ 1832874aeea5SJeff Kirsher efx_link_status_changed(efx); 1833874aeea5SJeff Kirsher 1834874aeea5SJeff Kirsher efx_start_all(efx); 1835dd40781eSBen Hutchings efx_selftest_async_start(efx); 1836874aeea5SJeff Kirsher return 0; 1837874aeea5SJeff Kirsher } 1838874aeea5SJeff Kirsher 1839874aeea5SJeff Kirsher /* Context: process, rtnl_lock() held. 1840874aeea5SJeff Kirsher * Note that the kernel will ignore our return code; this method 1841874aeea5SJeff Kirsher * should really be a void. 1842874aeea5SJeff Kirsher */ 1843874aeea5SJeff Kirsher static int efx_net_stop(struct net_device *net_dev) 1844874aeea5SJeff Kirsher { 1845874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 1846874aeea5SJeff Kirsher 1847874aeea5SJeff Kirsher netif_dbg(efx, ifdown, efx->net_dev, "closing on CPU %d\n", 1848874aeea5SJeff Kirsher raw_smp_processor_id()); 1849874aeea5SJeff Kirsher 1850874aeea5SJeff Kirsher if (efx->state != STATE_DISABLED) { 1851874aeea5SJeff Kirsher /* Stop the device and flush all the channels */ 1852874aeea5SJeff Kirsher efx_stop_all(efx); 1853874aeea5SJeff Kirsher } 1854874aeea5SJeff Kirsher 1855874aeea5SJeff Kirsher return 0; 1856874aeea5SJeff Kirsher } 1857874aeea5SJeff Kirsher 1858874aeea5SJeff Kirsher /* Context: process, dev_base_lock or RTNL held, non-blocking. */ 18592aa9ef11SBen Hutchings static struct rtnl_link_stats64 *efx_net_stats(struct net_device *net_dev, 18602aa9ef11SBen Hutchings struct rtnl_link_stats64 *stats) 1861874aeea5SJeff Kirsher { 1862874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 1863874aeea5SJeff Kirsher struct efx_mac_stats *mac_stats = &efx->mac_stats; 1864874aeea5SJeff Kirsher 1865874aeea5SJeff Kirsher spin_lock_bh(&efx->stats_lock); 18661cb34522SBen Hutchings 1867874aeea5SJeff Kirsher efx->type->update_stats(efx); 1868874aeea5SJeff Kirsher 1869874aeea5SJeff Kirsher stats->rx_packets = mac_stats->rx_packets; 1870874aeea5SJeff Kirsher stats->tx_packets = mac_stats->tx_packets; 1871874aeea5SJeff Kirsher stats->rx_bytes = mac_stats->rx_bytes; 1872874aeea5SJeff Kirsher stats->tx_bytes = mac_stats->tx_bytes; 1873874aeea5SJeff Kirsher stats->rx_dropped = efx->n_rx_nodesc_drop_cnt; 1874874aeea5SJeff Kirsher stats->multicast = mac_stats->rx_multicast; 1875874aeea5SJeff Kirsher stats->collisions = mac_stats->tx_collision; 1876874aeea5SJeff Kirsher stats->rx_length_errors = (mac_stats->rx_gtjumbo + 1877874aeea5SJeff Kirsher mac_stats->rx_length_error); 1878874aeea5SJeff Kirsher stats->rx_crc_errors = mac_stats->rx_bad; 1879874aeea5SJeff Kirsher stats->rx_frame_errors = mac_stats->rx_align_error; 1880874aeea5SJeff Kirsher stats->rx_fifo_errors = mac_stats->rx_overflow; 1881874aeea5SJeff Kirsher stats->rx_missed_errors = mac_stats->rx_missed; 1882874aeea5SJeff Kirsher stats->tx_window_errors = mac_stats->tx_late_collision; 1883874aeea5SJeff Kirsher 1884874aeea5SJeff Kirsher stats->rx_errors = (stats->rx_length_errors + 1885874aeea5SJeff Kirsher stats->rx_crc_errors + 1886874aeea5SJeff Kirsher stats->rx_frame_errors + 1887874aeea5SJeff Kirsher mac_stats->rx_symbol_error); 1888874aeea5SJeff Kirsher stats->tx_errors = (stats->tx_window_errors + 1889874aeea5SJeff Kirsher mac_stats->tx_bad); 1890874aeea5SJeff Kirsher 18911cb34522SBen Hutchings spin_unlock_bh(&efx->stats_lock); 18921cb34522SBen Hutchings 1893874aeea5SJeff Kirsher return stats; 1894874aeea5SJeff Kirsher } 1895874aeea5SJeff Kirsher 1896874aeea5SJeff Kirsher /* Context: netif_tx_lock held, BHs disabled. */ 1897874aeea5SJeff Kirsher static void efx_watchdog(struct net_device *net_dev) 1898874aeea5SJeff Kirsher { 1899874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 1900874aeea5SJeff Kirsher 1901874aeea5SJeff Kirsher netif_err(efx, tx_err, efx->net_dev, 1902874aeea5SJeff Kirsher "TX stuck with port_enabled=%d: resetting channels\n", 1903874aeea5SJeff Kirsher efx->port_enabled); 1904874aeea5SJeff Kirsher 1905874aeea5SJeff Kirsher efx_schedule_reset(efx, RESET_TYPE_TX_WATCHDOG); 1906874aeea5SJeff Kirsher } 1907874aeea5SJeff Kirsher 1908874aeea5SJeff Kirsher 1909874aeea5SJeff Kirsher /* Context: process, rtnl_lock() held. */ 1910874aeea5SJeff Kirsher static int efx_change_mtu(struct net_device *net_dev, int new_mtu) 1911874aeea5SJeff Kirsher { 1912874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 1913874aeea5SJeff Kirsher 1914874aeea5SJeff Kirsher EFX_ASSERT_RESET_SERIALISED(efx); 1915874aeea5SJeff Kirsher 1916874aeea5SJeff Kirsher if (new_mtu > EFX_MAX_MTU) 1917874aeea5SJeff Kirsher return -EINVAL; 1918874aeea5SJeff Kirsher 1919874aeea5SJeff Kirsher efx_stop_all(efx); 1920874aeea5SJeff Kirsher 1921874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "changing MTU to %d\n", new_mtu); 1922874aeea5SJeff Kirsher 1923874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 1924874aeea5SJeff Kirsher /* Reconfigure the MAC before enabling the dma queues so that 1925874aeea5SJeff Kirsher * the RX buffers don't overflow */ 1926874aeea5SJeff Kirsher net_dev->mtu = new_mtu; 1927710b208dSBen Hutchings efx->type->reconfigure_mac(efx); 1928874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 1929874aeea5SJeff Kirsher 1930874aeea5SJeff Kirsher efx_start_all(efx); 19316c8eef4aSBen Hutchings return 0; 1932874aeea5SJeff Kirsher } 1933874aeea5SJeff Kirsher 1934874aeea5SJeff Kirsher static int efx_set_mac_address(struct net_device *net_dev, void *data) 1935874aeea5SJeff Kirsher { 1936874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 1937874aeea5SJeff Kirsher struct sockaddr *addr = data; 1938874aeea5SJeff Kirsher char *new_addr = addr->sa_data; 1939874aeea5SJeff Kirsher 1940874aeea5SJeff Kirsher EFX_ASSERT_RESET_SERIALISED(efx); 1941874aeea5SJeff Kirsher 1942874aeea5SJeff Kirsher if (!is_valid_ether_addr(new_addr)) { 1943874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, 1944874aeea5SJeff Kirsher "invalid ethernet MAC address requested: %pM\n", 1945874aeea5SJeff Kirsher new_addr); 1946504f9b5aSDanny Kukawka return -EADDRNOTAVAIL; 1947874aeea5SJeff Kirsher } 1948874aeea5SJeff Kirsher 1949874aeea5SJeff Kirsher memcpy(net_dev->dev_addr, new_addr, net_dev->addr_len); 1950cd2d5b52SBen Hutchings efx_sriov_mac_address_changed(efx); 1951874aeea5SJeff Kirsher 1952874aeea5SJeff Kirsher /* Reconfigure the MAC */ 1953874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 1954710b208dSBen Hutchings efx->type->reconfigure_mac(efx); 1955874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 1956874aeea5SJeff Kirsher 1957874aeea5SJeff Kirsher return 0; 1958874aeea5SJeff Kirsher } 1959874aeea5SJeff Kirsher 1960874aeea5SJeff Kirsher /* Context: netif_addr_lock held, BHs disabled. */ 19610fca8c97SBen Hutchings static void efx_set_rx_mode(struct net_device *net_dev) 1962874aeea5SJeff Kirsher { 1963874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 1964874aeea5SJeff Kirsher struct netdev_hw_addr *ha; 1965874aeea5SJeff Kirsher union efx_multicast_hash *mc_hash = &efx->multicast_hash; 1966874aeea5SJeff Kirsher u32 crc; 1967874aeea5SJeff Kirsher int bit; 1968874aeea5SJeff Kirsher 1969874aeea5SJeff Kirsher efx->promiscuous = !!(net_dev->flags & IFF_PROMISC); 1970874aeea5SJeff Kirsher 1971874aeea5SJeff Kirsher /* Build multicast hash table */ 1972874aeea5SJeff Kirsher if (efx->promiscuous || (net_dev->flags & IFF_ALLMULTI)) { 1973874aeea5SJeff Kirsher memset(mc_hash, 0xff, sizeof(*mc_hash)); 1974874aeea5SJeff Kirsher } else { 1975874aeea5SJeff Kirsher memset(mc_hash, 0x00, sizeof(*mc_hash)); 1976874aeea5SJeff Kirsher netdev_for_each_mc_addr(ha, net_dev) { 1977874aeea5SJeff Kirsher crc = ether_crc_le(ETH_ALEN, ha->addr); 1978874aeea5SJeff Kirsher bit = crc & (EFX_MCAST_HASH_ENTRIES - 1); 1979874aeea5SJeff Kirsher set_bit_le(bit, mc_hash->byte); 1980874aeea5SJeff Kirsher } 1981874aeea5SJeff Kirsher 1982874aeea5SJeff Kirsher /* Broadcast packets go through the multicast hash filter. 1983874aeea5SJeff Kirsher * ether_crc_le() of the broadcast address is 0xbe2612ff 1984874aeea5SJeff Kirsher * so we always add bit 0xff to the mask. 1985874aeea5SJeff Kirsher */ 1986874aeea5SJeff Kirsher set_bit_le(0xff, mc_hash->byte); 1987874aeea5SJeff Kirsher } 1988874aeea5SJeff Kirsher 1989874aeea5SJeff Kirsher if (efx->port_enabled) 1990874aeea5SJeff Kirsher queue_work(efx->workqueue, &efx->mac_work); 1991874aeea5SJeff Kirsher /* Otherwise efx_start_port() will do this */ 1992874aeea5SJeff Kirsher } 1993874aeea5SJeff Kirsher 1994c8f44affSMichał Mirosław static int efx_set_features(struct net_device *net_dev, netdev_features_t data) 1995874aeea5SJeff Kirsher { 1996874aeea5SJeff Kirsher struct efx_nic *efx = netdev_priv(net_dev); 1997874aeea5SJeff Kirsher 1998874aeea5SJeff Kirsher /* If disabling RX n-tuple filtering, clear existing filters */ 1999874aeea5SJeff Kirsher if (net_dev->features & ~data & NETIF_F_NTUPLE) 2000874aeea5SJeff Kirsher efx_filter_clear_rx(efx, EFX_FILTER_PRI_MANUAL); 2001874aeea5SJeff Kirsher 2002874aeea5SJeff Kirsher return 0; 2003874aeea5SJeff Kirsher } 2004874aeea5SJeff Kirsher 2005874aeea5SJeff Kirsher static const struct net_device_ops efx_netdev_ops = { 2006874aeea5SJeff Kirsher .ndo_open = efx_net_open, 2007874aeea5SJeff Kirsher .ndo_stop = efx_net_stop, 2008874aeea5SJeff Kirsher .ndo_get_stats64 = efx_net_stats, 2009874aeea5SJeff Kirsher .ndo_tx_timeout = efx_watchdog, 2010874aeea5SJeff Kirsher .ndo_start_xmit = efx_hard_start_xmit, 2011874aeea5SJeff Kirsher .ndo_validate_addr = eth_validate_addr, 2012874aeea5SJeff Kirsher .ndo_do_ioctl = efx_ioctl, 2013874aeea5SJeff Kirsher .ndo_change_mtu = efx_change_mtu, 2014874aeea5SJeff Kirsher .ndo_set_mac_address = efx_set_mac_address, 20150fca8c97SBen Hutchings .ndo_set_rx_mode = efx_set_rx_mode, 2016874aeea5SJeff Kirsher .ndo_set_features = efx_set_features, 2017cd2d5b52SBen Hutchings #ifdef CONFIG_SFC_SRIOV 2018cd2d5b52SBen Hutchings .ndo_set_vf_mac = efx_sriov_set_vf_mac, 2019cd2d5b52SBen Hutchings .ndo_set_vf_vlan = efx_sriov_set_vf_vlan, 2020cd2d5b52SBen Hutchings .ndo_set_vf_spoofchk = efx_sriov_set_vf_spoofchk, 2021cd2d5b52SBen Hutchings .ndo_get_vf_config = efx_sriov_get_vf_config, 2022cd2d5b52SBen Hutchings #endif 2023874aeea5SJeff Kirsher #ifdef CONFIG_NET_POLL_CONTROLLER 2024874aeea5SJeff Kirsher .ndo_poll_controller = efx_netpoll, 2025874aeea5SJeff Kirsher #endif 2026874aeea5SJeff Kirsher .ndo_setup_tc = efx_setup_tc, 2027874aeea5SJeff Kirsher #ifdef CONFIG_RFS_ACCEL 2028874aeea5SJeff Kirsher .ndo_rx_flow_steer = efx_filter_rfs, 2029874aeea5SJeff Kirsher #endif 2030874aeea5SJeff Kirsher }; 2031874aeea5SJeff Kirsher 2032874aeea5SJeff Kirsher static void efx_update_name(struct efx_nic *efx) 2033874aeea5SJeff Kirsher { 2034874aeea5SJeff Kirsher strcpy(efx->name, efx->net_dev->name); 2035874aeea5SJeff Kirsher efx_mtd_rename(efx); 2036874aeea5SJeff Kirsher efx_set_channel_names(efx); 2037874aeea5SJeff Kirsher } 2038874aeea5SJeff Kirsher 2039874aeea5SJeff Kirsher static int efx_netdev_event(struct notifier_block *this, 2040874aeea5SJeff Kirsher unsigned long event, void *ptr) 2041874aeea5SJeff Kirsher { 2042874aeea5SJeff Kirsher struct net_device *net_dev = ptr; 2043874aeea5SJeff Kirsher 2044874aeea5SJeff Kirsher if (net_dev->netdev_ops == &efx_netdev_ops && 2045874aeea5SJeff Kirsher event == NETDEV_CHANGENAME) 2046874aeea5SJeff Kirsher efx_update_name(netdev_priv(net_dev)); 2047874aeea5SJeff Kirsher 2048874aeea5SJeff Kirsher return NOTIFY_DONE; 2049874aeea5SJeff Kirsher } 2050874aeea5SJeff Kirsher 2051874aeea5SJeff Kirsher static struct notifier_block efx_netdev_notifier = { 2052874aeea5SJeff Kirsher .notifier_call = efx_netdev_event, 2053874aeea5SJeff Kirsher }; 2054874aeea5SJeff Kirsher 2055874aeea5SJeff Kirsher static ssize_t 2056874aeea5SJeff Kirsher show_phy_type(struct device *dev, struct device_attribute *attr, char *buf) 2057874aeea5SJeff Kirsher { 2058874aeea5SJeff Kirsher struct efx_nic *efx = pci_get_drvdata(to_pci_dev(dev)); 2059874aeea5SJeff Kirsher return sprintf(buf, "%d\n", efx->phy_type); 2060874aeea5SJeff Kirsher } 2061874aeea5SJeff Kirsher static DEVICE_ATTR(phy_type, 0644, show_phy_type, NULL); 2062874aeea5SJeff Kirsher 2063874aeea5SJeff Kirsher static int efx_register_netdev(struct efx_nic *efx) 2064874aeea5SJeff Kirsher { 2065874aeea5SJeff Kirsher struct net_device *net_dev = efx->net_dev; 2066874aeea5SJeff Kirsher struct efx_channel *channel; 2067874aeea5SJeff Kirsher int rc; 2068874aeea5SJeff Kirsher 2069874aeea5SJeff Kirsher net_dev->watchdog_timeo = 5 * HZ; 2070874aeea5SJeff Kirsher net_dev->irq = efx->pci_dev->irq; 2071874aeea5SJeff Kirsher net_dev->netdev_ops = &efx_netdev_ops; 2072874aeea5SJeff Kirsher SET_ETHTOOL_OPS(net_dev, &efx_ethtool_ops); 2073874aeea5SJeff Kirsher 2074874aeea5SJeff Kirsher rtnl_lock(); 2075874aeea5SJeff Kirsher 2076874aeea5SJeff Kirsher rc = dev_alloc_name(net_dev, net_dev->name); 2077874aeea5SJeff Kirsher if (rc < 0) 2078874aeea5SJeff Kirsher goto fail_locked; 2079874aeea5SJeff Kirsher efx_update_name(efx); 2080874aeea5SJeff Kirsher 2081874aeea5SJeff Kirsher rc = register_netdevice(net_dev); 2082874aeea5SJeff Kirsher if (rc) 2083874aeea5SJeff Kirsher goto fail_locked; 2084874aeea5SJeff Kirsher 2085874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) { 2086874aeea5SJeff Kirsher struct efx_tx_queue *tx_queue; 2087874aeea5SJeff Kirsher efx_for_each_channel_tx_queue(tx_queue, channel) 2088874aeea5SJeff Kirsher efx_init_tx_queue_core_txq(tx_queue); 2089874aeea5SJeff Kirsher } 2090874aeea5SJeff Kirsher 2091874aeea5SJeff Kirsher /* Always start with carrier off; PHY events will detect the link */ 209286ee5302SBen Hutchings netif_carrier_off(net_dev); 2093874aeea5SJeff Kirsher 2094874aeea5SJeff Kirsher rtnl_unlock(); 2095874aeea5SJeff Kirsher 2096874aeea5SJeff Kirsher rc = device_create_file(&efx->pci_dev->dev, &dev_attr_phy_type); 2097874aeea5SJeff Kirsher if (rc) { 2098874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, 2099874aeea5SJeff Kirsher "failed to init net dev attributes\n"); 2100874aeea5SJeff Kirsher goto fail_registered; 2101874aeea5SJeff Kirsher } 2102874aeea5SJeff Kirsher 2103874aeea5SJeff Kirsher return 0; 2104874aeea5SJeff Kirsher 2105874aeea5SJeff Kirsher fail_locked: 2106874aeea5SJeff Kirsher rtnl_unlock(); 2107874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, "could not register net dev\n"); 2108874aeea5SJeff Kirsher return rc; 2109874aeea5SJeff Kirsher 2110874aeea5SJeff Kirsher fail_registered: 2111874aeea5SJeff Kirsher unregister_netdev(net_dev); 2112874aeea5SJeff Kirsher return rc; 2113874aeea5SJeff Kirsher } 2114874aeea5SJeff Kirsher 2115874aeea5SJeff Kirsher static void efx_unregister_netdev(struct efx_nic *efx) 2116874aeea5SJeff Kirsher { 2117874aeea5SJeff Kirsher struct efx_channel *channel; 2118874aeea5SJeff Kirsher struct efx_tx_queue *tx_queue; 2119874aeea5SJeff Kirsher 2120874aeea5SJeff Kirsher if (!efx->net_dev) 2121874aeea5SJeff Kirsher return; 2122874aeea5SJeff Kirsher 2123874aeea5SJeff Kirsher BUG_ON(netdev_priv(efx->net_dev) != efx); 2124874aeea5SJeff Kirsher 2125874aeea5SJeff Kirsher /* Free up any skbs still remaining. This has to happen before 2126874aeea5SJeff Kirsher * we try to unregister the netdev as running their destructors 2127874aeea5SJeff Kirsher * may be needed to get the device ref. count to 0. */ 2128874aeea5SJeff Kirsher efx_for_each_channel(channel, efx) { 2129874aeea5SJeff Kirsher efx_for_each_channel_tx_queue(tx_queue, channel) 2130874aeea5SJeff Kirsher efx_release_tx_buffers(tx_queue); 2131874aeea5SJeff Kirsher } 2132874aeea5SJeff Kirsher 2133874aeea5SJeff Kirsher strlcpy(efx->name, pci_name(efx->pci_dev), sizeof(efx->name)); 2134874aeea5SJeff Kirsher device_remove_file(&efx->pci_dev->dev, &dev_attr_phy_type); 2135874aeea5SJeff Kirsher unregister_netdev(efx->net_dev); 2136874aeea5SJeff Kirsher } 2137874aeea5SJeff Kirsher 2138874aeea5SJeff Kirsher /************************************************************************** 2139874aeea5SJeff Kirsher * 2140874aeea5SJeff Kirsher * Device reset and suspend 2141874aeea5SJeff Kirsher * 2142874aeea5SJeff Kirsher **************************************************************************/ 2143874aeea5SJeff Kirsher 2144874aeea5SJeff Kirsher /* Tears down the entire software state and most of the hardware state 2145874aeea5SJeff Kirsher * before reset. */ 2146874aeea5SJeff Kirsher void efx_reset_down(struct efx_nic *efx, enum reset_type method) 2147874aeea5SJeff Kirsher { 2148874aeea5SJeff Kirsher EFX_ASSERT_RESET_SERIALISED(efx); 2149874aeea5SJeff Kirsher 2150874aeea5SJeff Kirsher efx_stop_all(efx); 2151874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 2152874aeea5SJeff Kirsher 21537f967c01SBen Hutchings efx_stop_interrupts(efx, false); 2154874aeea5SJeff Kirsher if (efx->port_initialized && method != RESET_TYPE_INVISIBLE) 2155874aeea5SJeff Kirsher efx->phy_op->fini(efx); 2156874aeea5SJeff Kirsher efx->type->fini(efx); 2157874aeea5SJeff Kirsher } 2158874aeea5SJeff Kirsher 2159874aeea5SJeff Kirsher /* This function will always ensure that the locks acquired in 2160874aeea5SJeff Kirsher * efx_reset_down() are released. A failure return code indicates 2161874aeea5SJeff Kirsher * that we were unable to reinitialise the hardware, and the 2162874aeea5SJeff Kirsher * driver should be disabled. If ok is false, then the rx and tx 2163874aeea5SJeff Kirsher * engines are not restarted, pending a RESET_DISABLE. */ 2164874aeea5SJeff Kirsher int efx_reset_up(struct efx_nic *efx, enum reset_type method, bool ok) 2165874aeea5SJeff Kirsher { 2166874aeea5SJeff Kirsher int rc; 2167874aeea5SJeff Kirsher 2168874aeea5SJeff Kirsher EFX_ASSERT_RESET_SERIALISED(efx); 2169874aeea5SJeff Kirsher 2170874aeea5SJeff Kirsher rc = efx->type->init(efx); 2171874aeea5SJeff Kirsher if (rc) { 2172874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, "failed to initialise NIC\n"); 2173874aeea5SJeff Kirsher goto fail; 2174874aeea5SJeff Kirsher } 2175874aeea5SJeff Kirsher 2176874aeea5SJeff Kirsher if (!ok) 2177874aeea5SJeff Kirsher goto fail; 2178874aeea5SJeff Kirsher 2179874aeea5SJeff Kirsher if (efx->port_initialized && method != RESET_TYPE_INVISIBLE) { 2180874aeea5SJeff Kirsher rc = efx->phy_op->init(efx); 2181874aeea5SJeff Kirsher if (rc) 2182874aeea5SJeff Kirsher goto fail; 2183874aeea5SJeff Kirsher if (efx->phy_op->reconfigure(efx)) 2184874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, 2185874aeea5SJeff Kirsher "could not restore PHY settings\n"); 2186874aeea5SJeff Kirsher } 2187874aeea5SJeff Kirsher 2188710b208dSBen Hutchings efx->type->reconfigure_mac(efx); 2189874aeea5SJeff Kirsher 21907f967c01SBen Hutchings efx_start_interrupts(efx, false); 2191874aeea5SJeff Kirsher efx_restore_filters(efx); 2192cd2d5b52SBen Hutchings efx_sriov_reset(efx); 2193874aeea5SJeff Kirsher 2194874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 2195874aeea5SJeff Kirsher 2196874aeea5SJeff Kirsher efx_start_all(efx); 2197874aeea5SJeff Kirsher 2198874aeea5SJeff Kirsher return 0; 2199874aeea5SJeff Kirsher 2200874aeea5SJeff Kirsher fail: 2201874aeea5SJeff Kirsher efx->port_initialized = false; 2202874aeea5SJeff Kirsher 2203874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 2204874aeea5SJeff Kirsher 2205874aeea5SJeff Kirsher return rc; 2206874aeea5SJeff Kirsher } 2207874aeea5SJeff Kirsher 2208874aeea5SJeff Kirsher /* Reset the NIC using the specified method. Note that the reset may 2209874aeea5SJeff Kirsher * fail, in which case the card will be left in an unusable state. 2210874aeea5SJeff Kirsher * 2211874aeea5SJeff Kirsher * Caller must hold the rtnl_lock. 2212874aeea5SJeff Kirsher */ 2213874aeea5SJeff Kirsher int efx_reset(struct efx_nic *efx, enum reset_type method) 2214874aeea5SJeff Kirsher { 2215874aeea5SJeff Kirsher int rc, rc2; 2216874aeea5SJeff Kirsher bool disabled; 2217874aeea5SJeff Kirsher 2218874aeea5SJeff Kirsher netif_info(efx, drv, efx->net_dev, "resetting (%s)\n", 2219874aeea5SJeff Kirsher RESET_TYPE(method)); 2220874aeea5SJeff Kirsher 2221874aeea5SJeff Kirsher netif_device_detach(efx->net_dev); 2222874aeea5SJeff Kirsher efx_reset_down(efx, method); 2223874aeea5SJeff Kirsher 2224874aeea5SJeff Kirsher rc = efx->type->reset(efx, method); 2225874aeea5SJeff Kirsher if (rc) { 2226874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, "failed to reset hardware\n"); 2227874aeea5SJeff Kirsher goto out; 2228874aeea5SJeff Kirsher } 2229874aeea5SJeff Kirsher 2230874aeea5SJeff Kirsher /* Clear flags for the scopes we covered. We assume the NIC and 2231874aeea5SJeff Kirsher * driver are now quiescent so that there is no race here. 2232874aeea5SJeff Kirsher */ 2233874aeea5SJeff Kirsher efx->reset_pending &= -(1 << (method + 1)); 2234874aeea5SJeff Kirsher 2235874aeea5SJeff Kirsher /* Reinitialise bus-mastering, which may have been turned off before 2236874aeea5SJeff Kirsher * the reset was scheduled. This is still appropriate, even in the 2237874aeea5SJeff Kirsher * RESET_TYPE_DISABLE since this driver generally assumes the hardware 2238874aeea5SJeff Kirsher * can respond to requests. */ 2239874aeea5SJeff Kirsher pci_set_master(efx->pci_dev); 2240874aeea5SJeff Kirsher 2241874aeea5SJeff Kirsher out: 2242874aeea5SJeff Kirsher /* Leave device stopped if necessary */ 2243874aeea5SJeff Kirsher disabled = rc || method == RESET_TYPE_DISABLE; 2244874aeea5SJeff Kirsher rc2 = efx_reset_up(efx, method, !disabled); 2245874aeea5SJeff Kirsher if (rc2) { 2246874aeea5SJeff Kirsher disabled = true; 2247874aeea5SJeff Kirsher if (!rc) 2248874aeea5SJeff Kirsher rc = rc2; 2249874aeea5SJeff Kirsher } 2250874aeea5SJeff Kirsher 2251874aeea5SJeff Kirsher if (disabled) { 2252874aeea5SJeff Kirsher dev_close(efx->net_dev); 2253874aeea5SJeff Kirsher netif_err(efx, drv, efx->net_dev, "has been disabled\n"); 2254874aeea5SJeff Kirsher efx->state = STATE_DISABLED; 2255874aeea5SJeff Kirsher } else { 2256874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "reset complete\n"); 2257874aeea5SJeff Kirsher netif_device_attach(efx->net_dev); 2258874aeea5SJeff Kirsher } 2259874aeea5SJeff Kirsher return rc; 2260874aeea5SJeff Kirsher } 2261874aeea5SJeff Kirsher 2262874aeea5SJeff Kirsher /* The worker thread exists so that code that cannot sleep can 2263874aeea5SJeff Kirsher * schedule a reset for later. 2264874aeea5SJeff Kirsher */ 2265874aeea5SJeff Kirsher static void efx_reset_work(struct work_struct *data) 2266874aeea5SJeff Kirsher { 2267874aeea5SJeff Kirsher struct efx_nic *efx = container_of(data, struct efx_nic, reset_work); 2268874aeea5SJeff Kirsher unsigned long pending = ACCESS_ONCE(efx->reset_pending); 2269874aeea5SJeff Kirsher 2270874aeea5SJeff Kirsher if (!pending) 2271874aeea5SJeff Kirsher return; 2272874aeea5SJeff Kirsher 2273874aeea5SJeff Kirsher /* If we're not RUNNING then don't reset. Leave the reset_pending 2274874aeea5SJeff Kirsher * flags set so that efx_pci_probe_main will be retried */ 2275874aeea5SJeff Kirsher if (efx->state != STATE_RUNNING) { 2276874aeea5SJeff Kirsher netif_info(efx, drv, efx->net_dev, 2277874aeea5SJeff Kirsher "scheduled reset quenched. NIC not RUNNING\n"); 2278874aeea5SJeff Kirsher return; 2279874aeea5SJeff Kirsher } 2280874aeea5SJeff Kirsher 2281874aeea5SJeff Kirsher rtnl_lock(); 2282874aeea5SJeff Kirsher (void)efx_reset(efx, fls(pending) - 1); 2283874aeea5SJeff Kirsher rtnl_unlock(); 2284874aeea5SJeff Kirsher } 2285874aeea5SJeff Kirsher 2286874aeea5SJeff Kirsher void efx_schedule_reset(struct efx_nic *efx, enum reset_type type) 2287874aeea5SJeff Kirsher { 2288874aeea5SJeff Kirsher enum reset_type method; 2289874aeea5SJeff Kirsher 2290874aeea5SJeff Kirsher switch (type) { 2291874aeea5SJeff Kirsher case RESET_TYPE_INVISIBLE: 2292874aeea5SJeff Kirsher case RESET_TYPE_ALL: 2293874aeea5SJeff Kirsher case RESET_TYPE_WORLD: 2294874aeea5SJeff Kirsher case RESET_TYPE_DISABLE: 2295874aeea5SJeff Kirsher method = type; 2296874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "scheduling %s reset\n", 2297874aeea5SJeff Kirsher RESET_TYPE(method)); 2298874aeea5SJeff Kirsher break; 2299874aeea5SJeff Kirsher default: 2300874aeea5SJeff Kirsher method = efx->type->map_reset_reason(type); 2301874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, 2302874aeea5SJeff Kirsher "scheduling %s reset for %s\n", 2303874aeea5SJeff Kirsher RESET_TYPE(method), RESET_TYPE(type)); 2304874aeea5SJeff Kirsher break; 2305874aeea5SJeff Kirsher } 2306874aeea5SJeff Kirsher 2307874aeea5SJeff Kirsher set_bit(method, &efx->reset_pending); 2308874aeea5SJeff Kirsher 2309874aeea5SJeff Kirsher /* efx_process_channel() will no longer read events once a 2310874aeea5SJeff Kirsher * reset is scheduled. So switch back to poll'd MCDI completions. */ 2311874aeea5SJeff Kirsher efx_mcdi_mode_poll(efx); 2312874aeea5SJeff Kirsher 2313874aeea5SJeff Kirsher queue_work(reset_workqueue, &efx->reset_work); 2314874aeea5SJeff Kirsher } 2315874aeea5SJeff Kirsher 2316874aeea5SJeff Kirsher /************************************************************************** 2317874aeea5SJeff Kirsher * 2318874aeea5SJeff Kirsher * List of NICs we support 2319874aeea5SJeff Kirsher * 2320874aeea5SJeff Kirsher **************************************************************************/ 2321874aeea5SJeff Kirsher 2322874aeea5SJeff Kirsher /* PCI device ID table */ 2323874aeea5SJeff Kirsher static DEFINE_PCI_DEVICE_TABLE(efx_pci_table) = { 23240e59e7e7SLinus Torvalds {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 23250e59e7e7SLinus Torvalds PCI_DEVICE_ID_SOLARFLARE_SFC4000A_0), 2326874aeea5SJeff Kirsher .driver_data = (unsigned long) &falcon_a1_nic_type}, 23270e59e7e7SLinus Torvalds {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 23280e59e7e7SLinus Torvalds PCI_DEVICE_ID_SOLARFLARE_SFC4000B), 2329874aeea5SJeff Kirsher .driver_data = (unsigned long) &falcon_b0_nic_type}, 2330547c474fSBen Hutchings {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0803), /* SFC9020 */ 2331874aeea5SJeff Kirsher .driver_data = (unsigned long) &siena_a0_nic_type}, 2332547c474fSBen Hutchings {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0813), /* SFL9021 */ 2333874aeea5SJeff Kirsher .driver_data = (unsigned long) &siena_a0_nic_type}, 2334874aeea5SJeff Kirsher {0} /* end of list */ 2335874aeea5SJeff Kirsher }; 2336874aeea5SJeff Kirsher 2337874aeea5SJeff Kirsher /************************************************************************** 2338874aeea5SJeff Kirsher * 2339874aeea5SJeff Kirsher * Dummy PHY/MAC operations 2340874aeea5SJeff Kirsher * 2341874aeea5SJeff Kirsher * Can be used for some unimplemented operations 2342874aeea5SJeff Kirsher * Needed so all function pointers are valid and do not have to be tested 2343874aeea5SJeff Kirsher * before use 2344874aeea5SJeff Kirsher * 2345874aeea5SJeff Kirsher **************************************************************************/ 2346874aeea5SJeff Kirsher int efx_port_dummy_op_int(struct efx_nic *efx) 2347874aeea5SJeff Kirsher { 2348874aeea5SJeff Kirsher return 0; 2349874aeea5SJeff Kirsher } 2350874aeea5SJeff Kirsher void efx_port_dummy_op_void(struct efx_nic *efx) {} 2351874aeea5SJeff Kirsher 2352874aeea5SJeff Kirsher static bool efx_port_dummy_op_poll(struct efx_nic *efx) 2353874aeea5SJeff Kirsher { 2354874aeea5SJeff Kirsher return false; 2355874aeea5SJeff Kirsher } 2356874aeea5SJeff Kirsher 2357874aeea5SJeff Kirsher static const struct efx_phy_operations efx_dummy_phy_operations = { 2358874aeea5SJeff Kirsher .init = efx_port_dummy_op_int, 2359874aeea5SJeff Kirsher .reconfigure = efx_port_dummy_op_int, 2360874aeea5SJeff Kirsher .poll = efx_port_dummy_op_poll, 2361874aeea5SJeff Kirsher .fini = efx_port_dummy_op_void, 2362874aeea5SJeff Kirsher }; 2363874aeea5SJeff Kirsher 2364874aeea5SJeff Kirsher /************************************************************************** 2365874aeea5SJeff Kirsher * 2366874aeea5SJeff Kirsher * Data housekeeping 2367874aeea5SJeff Kirsher * 2368874aeea5SJeff Kirsher **************************************************************************/ 2369874aeea5SJeff Kirsher 2370874aeea5SJeff Kirsher /* This zeroes out and then fills in the invariants in a struct 2371874aeea5SJeff Kirsher * efx_nic (including all sub-structures). 2372874aeea5SJeff Kirsher */ 2373874aeea5SJeff Kirsher static int efx_init_struct(struct efx_nic *efx, const struct efx_nic_type *type, 2374874aeea5SJeff Kirsher struct pci_dev *pci_dev, struct net_device *net_dev) 2375874aeea5SJeff Kirsher { 2376874aeea5SJeff Kirsher int i; 2377874aeea5SJeff Kirsher 2378874aeea5SJeff Kirsher /* Initialise common structures */ 2379874aeea5SJeff Kirsher memset(efx, 0, sizeof(*efx)); 2380874aeea5SJeff Kirsher spin_lock_init(&efx->biu_lock); 2381874aeea5SJeff Kirsher #ifdef CONFIG_SFC_MTD 2382874aeea5SJeff Kirsher INIT_LIST_HEAD(&efx->mtd_list); 2383874aeea5SJeff Kirsher #endif 2384874aeea5SJeff Kirsher INIT_WORK(&efx->reset_work, efx_reset_work); 2385874aeea5SJeff Kirsher INIT_DELAYED_WORK(&efx->monitor_work, efx_monitor); 2386dd40781eSBen Hutchings INIT_DELAYED_WORK(&efx->selftest_work, efx_selftest_async_work); 2387874aeea5SJeff Kirsher efx->pci_dev = pci_dev; 2388874aeea5SJeff Kirsher efx->msg_enable = debug; 2389874aeea5SJeff Kirsher efx->state = STATE_INIT; 2390874aeea5SJeff Kirsher strlcpy(efx->name, pci_name(pci_dev), sizeof(efx->name)); 2391874aeea5SJeff Kirsher 2392874aeea5SJeff Kirsher efx->net_dev = net_dev; 2393874aeea5SJeff Kirsher spin_lock_init(&efx->stats_lock); 2394874aeea5SJeff Kirsher mutex_init(&efx->mac_lock); 2395874aeea5SJeff Kirsher efx->phy_op = &efx_dummy_phy_operations; 2396874aeea5SJeff Kirsher efx->mdio.dev = net_dev; 2397874aeea5SJeff Kirsher INIT_WORK(&efx->mac_work, efx_mac_work); 23989f2cb71cSBen Hutchings init_waitqueue_head(&efx->flush_wq); 2399874aeea5SJeff Kirsher 2400874aeea5SJeff Kirsher for (i = 0; i < EFX_MAX_CHANNELS; i++) { 2401874aeea5SJeff Kirsher efx->channel[i] = efx_alloc_channel(efx, i, NULL); 2402874aeea5SJeff Kirsher if (!efx->channel[i]) 2403874aeea5SJeff Kirsher goto fail; 2404874aeea5SJeff Kirsher } 2405874aeea5SJeff Kirsher 2406874aeea5SJeff Kirsher efx->type = type; 2407874aeea5SJeff Kirsher 2408874aeea5SJeff Kirsher EFX_BUG_ON_PARANOID(efx->type->phys_addr_channels > EFX_MAX_CHANNELS); 2409874aeea5SJeff Kirsher 2410874aeea5SJeff Kirsher /* Higher numbered interrupt modes are less capable! */ 2411874aeea5SJeff Kirsher efx->interrupt_mode = max(efx->type->max_interrupt_mode, 2412874aeea5SJeff Kirsher interrupt_mode); 2413874aeea5SJeff Kirsher 2414874aeea5SJeff Kirsher /* Would be good to use the net_dev name, but we're too early */ 2415874aeea5SJeff Kirsher snprintf(efx->workqueue_name, sizeof(efx->workqueue_name), "sfc%s", 2416874aeea5SJeff Kirsher pci_name(pci_dev)); 2417874aeea5SJeff Kirsher efx->workqueue = create_singlethread_workqueue(efx->workqueue_name); 2418874aeea5SJeff Kirsher if (!efx->workqueue) 2419874aeea5SJeff Kirsher goto fail; 2420874aeea5SJeff Kirsher 2421874aeea5SJeff Kirsher return 0; 2422874aeea5SJeff Kirsher 2423874aeea5SJeff Kirsher fail: 2424874aeea5SJeff Kirsher efx_fini_struct(efx); 2425874aeea5SJeff Kirsher return -ENOMEM; 2426874aeea5SJeff Kirsher } 2427874aeea5SJeff Kirsher 2428874aeea5SJeff Kirsher static void efx_fini_struct(struct efx_nic *efx) 2429874aeea5SJeff Kirsher { 2430874aeea5SJeff Kirsher int i; 2431874aeea5SJeff Kirsher 2432874aeea5SJeff Kirsher for (i = 0; i < EFX_MAX_CHANNELS; i++) 2433874aeea5SJeff Kirsher kfree(efx->channel[i]); 2434874aeea5SJeff Kirsher 2435874aeea5SJeff Kirsher if (efx->workqueue) { 2436874aeea5SJeff Kirsher destroy_workqueue(efx->workqueue); 2437874aeea5SJeff Kirsher efx->workqueue = NULL; 2438874aeea5SJeff Kirsher } 2439874aeea5SJeff Kirsher } 2440874aeea5SJeff Kirsher 2441874aeea5SJeff Kirsher /************************************************************************** 2442874aeea5SJeff Kirsher * 2443874aeea5SJeff Kirsher * PCI interface 2444874aeea5SJeff Kirsher * 2445874aeea5SJeff Kirsher **************************************************************************/ 2446874aeea5SJeff Kirsher 2447874aeea5SJeff Kirsher /* Main body of final NIC shutdown code 2448874aeea5SJeff Kirsher * This is called only at module unload (or hotplug removal). 2449874aeea5SJeff Kirsher */ 2450874aeea5SJeff Kirsher static void efx_pci_remove_main(struct efx_nic *efx) 2451874aeea5SJeff Kirsher { 2452874aeea5SJeff Kirsher #ifdef CONFIG_RFS_ACCEL 2453874aeea5SJeff Kirsher free_irq_cpu_rmap(efx->net_dev->rx_cpu_rmap); 2454874aeea5SJeff Kirsher efx->net_dev->rx_cpu_rmap = NULL; 2455874aeea5SJeff Kirsher #endif 24567f967c01SBen Hutchings efx_stop_interrupts(efx, false); 2457874aeea5SJeff Kirsher efx_nic_fini_interrupt(efx); 2458874aeea5SJeff Kirsher efx_fini_port(efx); 2459874aeea5SJeff Kirsher efx->type->fini(efx); 2460874aeea5SJeff Kirsher efx_fini_napi(efx); 2461874aeea5SJeff Kirsher efx_remove_all(efx); 2462874aeea5SJeff Kirsher } 2463874aeea5SJeff Kirsher 2464874aeea5SJeff Kirsher /* Final NIC shutdown 2465874aeea5SJeff Kirsher * This is called only at module unload (or hotplug removal). 2466874aeea5SJeff Kirsher */ 2467874aeea5SJeff Kirsher static void efx_pci_remove(struct pci_dev *pci_dev) 2468874aeea5SJeff Kirsher { 2469874aeea5SJeff Kirsher struct efx_nic *efx; 2470874aeea5SJeff Kirsher 2471874aeea5SJeff Kirsher efx = pci_get_drvdata(pci_dev); 2472874aeea5SJeff Kirsher if (!efx) 2473874aeea5SJeff Kirsher return; 2474874aeea5SJeff Kirsher 2475874aeea5SJeff Kirsher /* Mark the NIC as fini, then stop the interface */ 2476874aeea5SJeff Kirsher rtnl_lock(); 2477874aeea5SJeff Kirsher efx->state = STATE_FINI; 2478874aeea5SJeff Kirsher dev_close(efx->net_dev); 2479874aeea5SJeff Kirsher 2480874aeea5SJeff Kirsher /* Allow any queued efx_resets() to complete */ 2481874aeea5SJeff Kirsher rtnl_unlock(); 2482874aeea5SJeff Kirsher 24837f967c01SBen Hutchings efx_stop_interrupts(efx, false); 2484cd2d5b52SBen Hutchings efx_sriov_fini(efx); 2485874aeea5SJeff Kirsher efx_unregister_netdev(efx); 2486874aeea5SJeff Kirsher 2487874aeea5SJeff Kirsher efx_mtd_remove(efx); 2488874aeea5SJeff Kirsher 2489874aeea5SJeff Kirsher /* Wait for any scheduled resets to complete. No more will be 2490874aeea5SJeff Kirsher * scheduled from this point because efx_stop_all() has been 2491874aeea5SJeff Kirsher * called, we are no longer registered with driverlink, and 2492874aeea5SJeff Kirsher * the net_device's have been removed. */ 2493874aeea5SJeff Kirsher cancel_work_sync(&efx->reset_work); 2494874aeea5SJeff Kirsher 2495874aeea5SJeff Kirsher efx_pci_remove_main(efx); 2496874aeea5SJeff Kirsher 2497874aeea5SJeff Kirsher efx_fini_io(efx); 2498874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "shutdown successful\n"); 2499874aeea5SJeff Kirsher 2500874aeea5SJeff Kirsher pci_set_drvdata(pci_dev, NULL); 2501874aeea5SJeff Kirsher efx_fini_struct(efx); 2502874aeea5SJeff Kirsher free_netdev(efx->net_dev); 2503874aeea5SJeff Kirsher }; 2504874aeea5SJeff Kirsher 2505460eeaa0SBen Hutchings /* NIC VPD information 2506460eeaa0SBen Hutchings * Called during probe to display the part number of the 2507460eeaa0SBen Hutchings * installed NIC. VPD is potentially very large but this should 2508460eeaa0SBen Hutchings * always appear within the first 512 bytes. 2509460eeaa0SBen Hutchings */ 2510460eeaa0SBen Hutchings #define SFC_VPD_LEN 512 2511460eeaa0SBen Hutchings static void efx_print_product_vpd(struct efx_nic *efx) 2512460eeaa0SBen Hutchings { 2513460eeaa0SBen Hutchings struct pci_dev *dev = efx->pci_dev; 2514460eeaa0SBen Hutchings char vpd_data[SFC_VPD_LEN]; 2515460eeaa0SBen Hutchings ssize_t vpd_size; 2516460eeaa0SBen Hutchings int i, j; 2517460eeaa0SBen Hutchings 2518460eeaa0SBen Hutchings /* Get the vpd data from the device */ 2519460eeaa0SBen Hutchings vpd_size = pci_read_vpd(dev, 0, sizeof(vpd_data), vpd_data); 2520460eeaa0SBen Hutchings if (vpd_size <= 0) { 2521460eeaa0SBen Hutchings netif_err(efx, drv, efx->net_dev, "Unable to read VPD\n"); 2522460eeaa0SBen Hutchings return; 2523460eeaa0SBen Hutchings } 2524460eeaa0SBen Hutchings 2525460eeaa0SBen Hutchings /* Get the Read only section */ 2526460eeaa0SBen Hutchings i = pci_vpd_find_tag(vpd_data, 0, vpd_size, PCI_VPD_LRDT_RO_DATA); 2527460eeaa0SBen Hutchings if (i < 0) { 2528460eeaa0SBen Hutchings netif_err(efx, drv, efx->net_dev, "VPD Read-only not found\n"); 2529460eeaa0SBen Hutchings return; 2530460eeaa0SBen Hutchings } 2531460eeaa0SBen Hutchings 2532460eeaa0SBen Hutchings j = pci_vpd_lrdt_size(&vpd_data[i]); 2533460eeaa0SBen Hutchings i += PCI_VPD_LRDT_TAG_SIZE; 2534460eeaa0SBen Hutchings if (i + j > vpd_size) 2535460eeaa0SBen Hutchings j = vpd_size - i; 2536460eeaa0SBen Hutchings 2537460eeaa0SBen Hutchings /* Get the Part number */ 2538460eeaa0SBen Hutchings i = pci_vpd_find_info_keyword(vpd_data, i, j, "PN"); 2539460eeaa0SBen Hutchings if (i < 0) { 2540460eeaa0SBen Hutchings netif_err(efx, drv, efx->net_dev, "Part number not found\n"); 2541460eeaa0SBen Hutchings return; 2542460eeaa0SBen Hutchings } 2543460eeaa0SBen Hutchings 2544460eeaa0SBen Hutchings j = pci_vpd_info_field_size(&vpd_data[i]); 2545460eeaa0SBen Hutchings i += PCI_VPD_INFO_FLD_HDR_SIZE; 2546460eeaa0SBen Hutchings if (i + j > vpd_size) { 2547460eeaa0SBen Hutchings netif_err(efx, drv, efx->net_dev, "Incomplete part number\n"); 2548460eeaa0SBen Hutchings return; 2549460eeaa0SBen Hutchings } 2550460eeaa0SBen Hutchings 2551460eeaa0SBen Hutchings netif_info(efx, drv, efx->net_dev, 2552460eeaa0SBen Hutchings "Part Number : %.*s\n", j, &vpd_data[i]); 2553460eeaa0SBen Hutchings } 2554460eeaa0SBen Hutchings 2555460eeaa0SBen Hutchings 2556874aeea5SJeff Kirsher /* Main body of NIC initialisation 2557874aeea5SJeff Kirsher * This is called at module load (or hotplug insertion, theoretically). 2558874aeea5SJeff Kirsher */ 2559874aeea5SJeff Kirsher static int efx_pci_probe_main(struct efx_nic *efx) 2560874aeea5SJeff Kirsher { 2561874aeea5SJeff Kirsher int rc; 2562874aeea5SJeff Kirsher 2563874aeea5SJeff Kirsher /* Do start-of-day initialisation */ 2564874aeea5SJeff Kirsher rc = efx_probe_all(efx); 2565874aeea5SJeff Kirsher if (rc) 2566874aeea5SJeff Kirsher goto fail1; 2567874aeea5SJeff Kirsher 2568874aeea5SJeff Kirsher efx_init_napi(efx); 2569874aeea5SJeff Kirsher 2570874aeea5SJeff Kirsher rc = efx->type->init(efx); 2571874aeea5SJeff Kirsher if (rc) { 2572874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 2573874aeea5SJeff Kirsher "failed to initialise NIC\n"); 2574874aeea5SJeff Kirsher goto fail3; 2575874aeea5SJeff Kirsher } 2576874aeea5SJeff Kirsher 2577874aeea5SJeff Kirsher rc = efx_init_port(efx); 2578874aeea5SJeff Kirsher if (rc) { 2579874aeea5SJeff Kirsher netif_err(efx, probe, efx->net_dev, 2580874aeea5SJeff Kirsher "failed to initialise port\n"); 2581874aeea5SJeff Kirsher goto fail4; 2582874aeea5SJeff Kirsher } 2583874aeea5SJeff Kirsher 2584874aeea5SJeff Kirsher rc = efx_nic_init_interrupt(efx); 2585874aeea5SJeff Kirsher if (rc) 2586874aeea5SJeff Kirsher goto fail5; 25877f967c01SBen Hutchings efx_start_interrupts(efx, false); 2588874aeea5SJeff Kirsher 2589874aeea5SJeff Kirsher return 0; 2590874aeea5SJeff Kirsher 2591874aeea5SJeff Kirsher fail5: 2592874aeea5SJeff Kirsher efx_fini_port(efx); 2593874aeea5SJeff Kirsher fail4: 2594874aeea5SJeff Kirsher efx->type->fini(efx); 2595874aeea5SJeff Kirsher fail3: 2596874aeea5SJeff Kirsher efx_fini_napi(efx); 2597874aeea5SJeff Kirsher efx_remove_all(efx); 2598874aeea5SJeff Kirsher fail1: 2599874aeea5SJeff Kirsher return rc; 2600874aeea5SJeff Kirsher } 2601874aeea5SJeff Kirsher 2602874aeea5SJeff Kirsher /* NIC initialisation 2603874aeea5SJeff Kirsher * 2604874aeea5SJeff Kirsher * This is called at module load (or hotplug insertion, 260573ba7b68SBen Hutchings * theoretically). It sets up PCI mappings, resets the NIC, 2606874aeea5SJeff Kirsher * sets up and registers the network devices with the kernel and hooks 2607874aeea5SJeff Kirsher * the interrupt service routine. It does not prepare the device for 2608874aeea5SJeff Kirsher * transmission; this is left to the first time one of the network 2609874aeea5SJeff Kirsher * interfaces is brought up (i.e. efx_net_open). 2610874aeea5SJeff Kirsher */ 2611874aeea5SJeff Kirsher static int __devinit efx_pci_probe(struct pci_dev *pci_dev, 2612874aeea5SJeff Kirsher const struct pci_device_id *entry) 2613874aeea5SJeff Kirsher { 2614874aeea5SJeff Kirsher const struct efx_nic_type *type = (const struct efx_nic_type *) entry->driver_data; 2615874aeea5SJeff Kirsher struct net_device *net_dev; 2616874aeea5SJeff Kirsher struct efx_nic *efx; 2617fadac6aaSBen Hutchings int rc; 2618874aeea5SJeff Kirsher 2619874aeea5SJeff Kirsher /* Allocate and initialise a struct net_device and struct efx_nic */ 2620874aeea5SJeff Kirsher net_dev = alloc_etherdev_mqs(sizeof(*efx), EFX_MAX_CORE_TX_QUEUES, 2621874aeea5SJeff Kirsher EFX_MAX_RX_QUEUES); 2622874aeea5SJeff Kirsher if (!net_dev) 2623874aeea5SJeff Kirsher return -ENOMEM; 2624874aeea5SJeff Kirsher net_dev->features |= (type->offload_features | NETIF_F_SG | 2625874aeea5SJeff Kirsher NETIF_F_HIGHDMA | NETIF_F_TSO | 2626874aeea5SJeff Kirsher NETIF_F_RXCSUM); 2627874aeea5SJeff Kirsher if (type->offload_features & NETIF_F_V6_CSUM) 2628874aeea5SJeff Kirsher net_dev->features |= NETIF_F_TSO6; 2629874aeea5SJeff Kirsher /* Mask for features that also apply to VLAN devices */ 2630874aeea5SJeff Kirsher net_dev->vlan_features |= (NETIF_F_ALL_CSUM | NETIF_F_SG | 2631874aeea5SJeff Kirsher NETIF_F_HIGHDMA | NETIF_F_ALL_TSO | 2632874aeea5SJeff Kirsher NETIF_F_RXCSUM); 2633874aeea5SJeff Kirsher /* All offloads can be toggled */ 2634874aeea5SJeff Kirsher net_dev->hw_features = net_dev->features & ~NETIF_F_HIGHDMA; 2635874aeea5SJeff Kirsher efx = netdev_priv(net_dev); 2636874aeea5SJeff Kirsher pci_set_drvdata(pci_dev, efx); 2637874aeea5SJeff Kirsher SET_NETDEV_DEV(net_dev, &pci_dev->dev); 2638874aeea5SJeff Kirsher rc = efx_init_struct(efx, type, pci_dev, net_dev); 2639874aeea5SJeff Kirsher if (rc) 2640874aeea5SJeff Kirsher goto fail1; 2641874aeea5SJeff Kirsher 2642874aeea5SJeff Kirsher netif_info(efx, probe, efx->net_dev, 2643874aeea5SJeff Kirsher "Solarflare NIC detected\n"); 2644874aeea5SJeff Kirsher 2645460eeaa0SBen Hutchings efx_print_product_vpd(efx); 2646460eeaa0SBen Hutchings 2647874aeea5SJeff Kirsher /* Set up basic I/O (BAR mappings etc) */ 2648874aeea5SJeff Kirsher rc = efx_init_io(efx); 2649874aeea5SJeff Kirsher if (rc) 2650874aeea5SJeff Kirsher goto fail2; 2651874aeea5SJeff Kirsher 2652874aeea5SJeff Kirsher rc = efx_pci_probe_main(efx); 2653874aeea5SJeff Kirsher 2654874aeea5SJeff Kirsher /* Serialise against efx_reset(). No more resets will be 2655fadac6aaSBen Hutchings * scheduled since efx_stop_all() has been called, and we have 2656fadac6aaSBen Hutchings * not and never have been registered. 2657fadac6aaSBen Hutchings */ 2658874aeea5SJeff Kirsher cancel_work_sync(&efx->reset_work); 2659874aeea5SJeff Kirsher 2660fadac6aaSBen Hutchings if (rc) 2661874aeea5SJeff Kirsher goto fail3; 2662874aeea5SJeff Kirsher 2663fadac6aaSBen Hutchings /* If there was a scheduled reset during probe, the NIC is 2664fadac6aaSBen Hutchings * probably hosed anyway. 2665fadac6aaSBen Hutchings */ 2666fadac6aaSBen Hutchings if (efx->reset_pending) { 2667fadac6aaSBen Hutchings rc = -EIO; 2668874aeea5SJeff Kirsher goto fail4; 2669874aeea5SJeff Kirsher } 2670874aeea5SJeff Kirsher 2671874aeea5SJeff Kirsher /* Switch to the running state before we expose the device to the OS, 2672874aeea5SJeff Kirsher * so that dev_open()|efx_start_all() will actually start the device */ 2673874aeea5SJeff Kirsher efx->state = STATE_RUNNING; 2674874aeea5SJeff Kirsher 2675874aeea5SJeff Kirsher rc = efx_register_netdev(efx); 2676874aeea5SJeff Kirsher if (rc) 2677fadac6aaSBen Hutchings goto fail4; 2678874aeea5SJeff Kirsher 2679cd2d5b52SBen Hutchings rc = efx_sriov_init(efx); 2680cd2d5b52SBen Hutchings if (rc) 2681cd2d5b52SBen Hutchings netif_err(efx, probe, efx->net_dev, 2682cd2d5b52SBen Hutchings "SR-IOV can't be enabled rc %d\n", rc); 2683cd2d5b52SBen Hutchings 2684874aeea5SJeff Kirsher netif_dbg(efx, probe, efx->net_dev, "initialisation successful\n"); 2685874aeea5SJeff Kirsher 26867c43161cSBen Hutchings /* Try to create MTDs, but allow this to fail */ 2687874aeea5SJeff Kirsher rtnl_lock(); 26887c43161cSBen Hutchings rc = efx_mtd_probe(efx); 2689874aeea5SJeff Kirsher rtnl_unlock(); 26907c43161cSBen Hutchings if (rc) 26917c43161cSBen Hutchings netif_warn(efx, probe, efx->net_dev, 26927c43161cSBen Hutchings "failed to create MTDs (%d)\n", rc); 26937c43161cSBen Hutchings 2694874aeea5SJeff Kirsher return 0; 2695874aeea5SJeff Kirsher 2696874aeea5SJeff Kirsher fail4: 2697fadac6aaSBen Hutchings efx_pci_remove_main(efx); 2698874aeea5SJeff Kirsher fail3: 2699874aeea5SJeff Kirsher efx_fini_io(efx); 2700874aeea5SJeff Kirsher fail2: 2701874aeea5SJeff Kirsher efx_fini_struct(efx); 2702874aeea5SJeff Kirsher fail1: 2703874aeea5SJeff Kirsher WARN_ON(rc > 0); 2704874aeea5SJeff Kirsher netif_dbg(efx, drv, efx->net_dev, "initialisation failed. rc=%d\n", rc); 2705874aeea5SJeff Kirsher free_netdev(net_dev); 2706874aeea5SJeff Kirsher return rc; 2707874aeea5SJeff Kirsher } 2708874aeea5SJeff Kirsher 2709874aeea5SJeff Kirsher static int efx_pm_freeze(struct device *dev) 2710874aeea5SJeff Kirsher { 2711874aeea5SJeff Kirsher struct efx_nic *efx = pci_get_drvdata(to_pci_dev(dev)); 2712874aeea5SJeff Kirsher 2713874aeea5SJeff Kirsher efx->state = STATE_FINI; 2714874aeea5SJeff Kirsher 2715874aeea5SJeff Kirsher netif_device_detach(efx->net_dev); 2716874aeea5SJeff Kirsher 2717874aeea5SJeff Kirsher efx_stop_all(efx); 27187f967c01SBen Hutchings efx_stop_interrupts(efx, false); 2719874aeea5SJeff Kirsher 2720874aeea5SJeff Kirsher return 0; 2721874aeea5SJeff Kirsher } 2722874aeea5SJeff Kirsher 2723874aeea5SJeff Kirsher static int efx_pm_thaw(struct device *dev) 2724874aeea5SJeff Kirsher { 2725874aeea5SJeff Kirsher struct efx_nic *efx = pci_get_drvdata(to_pci_dev(dev)); 2726874aeea5SJeff Kirsher 2727874aeea5SJeff Kirsher efx->state = STATE_INIT; 2728874aeea5SJeff Kirsher 27297f967c01SBen Hutchings efx_start_interrupts(efx, false); 2730874aeea5SJeff Kirsher 2731874aeea5SJeff Kirsher mutex_lock(&efx->mac_lock); 2732874aeea5SJeff Kirsher efx->phy_op->reconfigure(efx); 2733874aeea5SJeff Kirsher mutex_unlock(&efx->mac_lock); 2734874aeea5SJeff Kirsher 2735874aeea5SJeff Kirsher efx_start_all(efx); 2736874aeea5SJeff Kirsher 2737874aeea5SJeff Kirsher netif_device_attach(efx->net_dev); 2738874aeea5SJeff Kirsher 2739874aeea5SJeff Kirsher efx->state = STATE_RUNNING; 2740874aeea5SJeff Kirsher 2741874aeea5SJeff Kirsher efx->type->resume_wol(efx); 2742874aeea5SJeff Kirsher 2743874aeea5SJeff Kirsher /* Reschedule any quenched resets scheduled during efx_pm_freeze() */ 2744874aeea5SJeff Kirsher queue_work(reset_workqueue, &efx->reset_work); 2745874aeea5SJeff Kirsher 2746874aeea5SJeff Kirsher return 0; 2747874aeea5SJeff Kirsher } 2748874aeea5SJeff Kirsher 2749874aeea5SJeff Kirsher static int efx_pm_poweroff(struct device *dev) 2750874aeea5SJeff Kirsher { 2751874aeea5SJeff Kirsher struct pci_dev *pci_dev = to_pci_dev(dev); 2752874aeea5SJeff Kirsher struct efx_nic *efx = pci_get_drvdata(pci_dev); 2753874aeea5SJeff Kirsher 2754874aeea5SJeff Kirsher efx->type->fini(efx); 2755874aeea5SJeff Kirsher 2756874aeea5SJeff Kirsher efx->reset_pending = 0; 2757874aeea5SJeff Kirsher 2758874aeea5SJeff Kirsher pci_save_state(pci_dev); 2759874aeea5SJeff Kirsher return pci_set_power_state(pci_dev, PCI_D3hot); 2760874aeea5SJeff Kirsher } 2761874aeea5SJeff Kirsher 2762874aeea5SJeff Kirsher /* Used for both resume and restore */ 2763874aeea5SJeff Kirsher static int efx_pm_resume(struct device *dev) 2764874aeea5SJeff Kirsher { 2765874aeea5SJeff Kirsher struct pci_dev *pci_dev = to_pci_dev(dev); 2766874aeea5SJeff Kirsher struct efx_nic *efx = pci_get_drvdata(pci_dev); 2767874aeea5SJeff Kirsher int rc; 2768874aeea5SJeff Kirsher 2769874aeea5SJeff Kirsher rc = pci_set_power_state(pci_dev, PCI_D0); 2770874aeea5SJeff Kirsher if (rc) 2771874aeea5SJeff Kirsher return rc; 2772874aeea5SJeff Kirsher pci_restore_state(pci_dev); 2773874aeea5SJeff Kirsher rc = pci_enable_device(pci_dev); 2774874aeea5SJeff Kirsher if (rc) 2775874aeea5SJeff Kirsher return rc; 2776874aeea5SJeff Kirsher pci_set_master(efx->pci_dev); 2777874aeea5SJeff Kirsher rc = efx->type->reset(efx, RESET_TYPE_ALL); 2778874aeea5SJeff Kirsher if (rc) 2779874aeea5SJeff Kirsher return rc; 2780874aeea5SJeff Kirsher rc = efx->type->init(efx); 2781874aeea5SJeff Kirsher if (rc) 2782874aeea5SJeff Kirsher return rc; 2783874aeea5SJeff Kirsher efx_pm_thaw(dev); 2784874aeea5SJeff Kirsher return 0; 2785874aeea5SJeff Kirsher } 2786874aeea5SJeff Kirsher 2787874aeea5SJeff Kirsher static int efx_pm_suspend(struct device *dev) 2788874aeea5SJeff Kirsher { 2789874aeea5SJeff Kirsher int rc; 2790874aeea5SJeff Kirsher 2791874aeea5SJeff Kirsher efx_pm_freeze(dev); 2792874aeea5SJeff Kirsher rc = efx_pm_poweroff(dev); 2793874aeea5SJeff Kirsher if (rc) 2794874aeea5SJeff Kirsher efx_pm_resume(dev); 2795874aeea5SJeff Kirsher return rc; 2796874aeea5SJeff Kirsher } 2797874aeea5SJeff Kirsher 279818e83e4cSBen Hutchings static const struct dev_pm_ops efx_pm_ops = { 2799874aeea5SJeff Kirsher .suspend = efx_pm_suspend, 2800874aeea5SJeff Kirsher .resume = efx_pm_resume, 2801874aeea5SJeff Kirsher .freeze = efx_pm_freeze, 2802874aeea5SJeff Kirsher .thaw = efx_pm_thaw, 2803874aeea5SJeff Kirsher .poweroff = efx_pm_poweroff, 2804874aeea5SJeff Kirsher .restore = efx_pm_resume, 2805874aeea5SJeff Kirsher }; 2806874aeea5SJeff Kirsher 2807874aeea5SJeff Kirsher static struct pci_driver efx_pci_driver = { 2808874aeea5SJeff Kirsher .name = KBUILD_MODNAME, 2809874aeea5SJeff Kirsher .id_table = efx_pci_table, 2810874aeea5SJeff Kirsher .probe = efx_pci_probe, 2811874aeea5SJeff Kirsher .remove = efx_pci_remove, 2812874aeea5SJeff Kirsher .driver.pm = &efx_pm_ops, 2813874aeea5SJeff Kirsher }; 2814874aeea5SJeff Kirsher 2815874aeea5SJeff Kirsher /************************************************************************** 2816874aeea5SJeff Kirsher * 2817874aeea5SJeff Kirsher * Kernel module interface 2818874aeea5SJeff Kirsher * 2819874aeea5SJeff Kirsher *************************************************************************/ 2820874aeea5SJeff Kirsher 2821874aeea5SJeff Kirsher module_param(interrupt_mode, uint, 0444); 2822874aeea5SJeff Kirsher MODULE_PARM_DESC(interrupt_mode, 2823874aeea5SJeff Kirsher "Interrupt mode (0=>MSIX 1=>MSI 2=>legacy)"); 2824874aeea5SJeff Kirsher 2825874aeea5SJeff Kirsher static int __init efx_init_module(void) 2826874aeea5SJeff Kirsher { 2827874aeea5SJeff Kirsher int rc; 2828874aeea5SJeff Kirsher 2829874aeea5SJeff Kirsher printk(KERN_INFO "Solarflare NET driver v" EFX_DRIVER_VERSION "\n"); 2830874aeea5SJeff Kirsher 2831874aeea5SJeff Kirsher rc = register_netdevice_notifier(&efx_netdev_notifier); 2832874aeea5SJeff Kirsher if (rc) 2833874aeea5SJeff Kirsher goto err_notifier; 2834874aeea5SJeff Kirsher 2835cd2d5b52SBen Hutchings rc = efx_init_sriov(); 2836cd2d5b52SBen Hutchings if (rc) 2837cd2d5b52SBen Hutchings goto err_sriov; 2838cd2d5b52SBen Hutchings 2839874aeea5SJeff Kirsher reset_workqueue = create_singlethread_workqueue("sfc_reset"); 2840874aeea5SJeff Kirsher if (!reset_workqueue) { 2841874aeea5SJeff Kirsher rc = -ENOMEM; 2842874aeea5SJeff Kirsher goto err_reset; 2843874aeea5SJeff Kirsher } 2844874aeea5SJeff Kirsher 2845874aeea5SJeff Kirsher rc = pci_register_driver(&efx_pci_driver); 2846874aeea5SJeff Kirsher if (rc < 0) 2847874aeea5SJeff Kirsher goto err_pci; 2848874aeea5SJeff Kirsher 2849874aeea5SJeff Kirsher return 0; 2850874aeea5SJeff Kirsher 2851874aeea5SJeff Kirsher err_pci: 2852874aeea5SJeff Kirsher destroy_workqueue(reset_workqueue); 2853874aeea5SJeff Kirsher err_reset: 2854cd2d5b52SBen Hutchings efx_fini_sriov(); 2855cd2d5b52SBen Hutchings err_sriov: 2856874aeea5SJeff Kirsher unregister_netdevice_notifier(&efx_netdev_notifier); 2857874aeea5SJeff Kirsher err_notifier: 2858874aeea5SJeff Kirsher return rc; 2859874aeea5SJeff Kirsher } 2860874aeea5SJeff Kirsher 2861874aeea5SJeff Kirsher static void __exit efx_exit_module(void) 2862874aeea5SJeff Kirsher { 2863874aeea5SJeff Kirsher printk(KERN_INFO "Solarflare NET driver unloading\n"); 2864874aeea5SJeff Kirsher 2865874aeea5SJeff Kirsher pci_unregister_driver(&efx_pci_driver); 2866874aeea5SJeff Kirsher destroy_workqueue(reset_workqueue); 2867cd2d5b52SBen Hutchings efx_fini_sriov(); 2868874aeea5SJeff Kirsher unregister_netdevice_notifier(&efx_netdev_notifier); 2869874aeea5SJeff Kirsher 2870874aeea5SJeff Kirsher } 2871874aeea5SJeff Kirsher 2872874aeea5SJeff Kirsher module_init(efx_init_module); 2873874aeea5SJeff Kirsher module_exit(efx_exit_module); 2874874aeea5SJeff Kirsher 2875874aeea5SJeff Kirsher MODULE_AUTHOR("Solarflare Communications and " 2876874aeea5SJeff Kirsher "Michael Brown <mbrown@fensystems.co.uk>"); 2877874aeea5SJeff Kirsher MODULE_DESCRIPTION("Solarflare Communications network driver"); 2878874aeea5SJeff Kirsher MODULE_LICENSE("GPL"); 2879874aeea5SJeff Kirsher MODULE_DEVICE_TABLE(pci, efx_pci_table); 2880