| 1 | /******************************************************************************* |
| 2 | |
| 3 | Intel PRO/10GbE Linux driver |
| 4 | Copyright(c) 1999 - 2008 Intel Corporation. |
| 5 | |
| 6 | This program is free software; you can redistribute it and/or modify it |
| 7 | under the terms and conditions of the GNU General Public License, |
| 8 | version 2, as published by the Free Software Foundation. |
| 9 | |
| 10 | This program is distributed in the hope it will be useful, but WITHOUT |
| 11 | ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 12 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| 13 | more details. |
| 14 | |
| 15 | You should have received a copy of the GNU General Public License along with |
| 16 | this program; if not, write to the Free Software Foundation, Inc., |
| 17 | 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. |
| 18 | |
| 19 | The full GNU General Public License is included in this distribution in |
| 20 | the file called "COPYING". |
| 21 | |
| 22 | Contact Information: |
| 23 | Linux NICS <linux.nics@intel.com> |
| 24 | e1000-devel Mailing List <e1000-devel@lists.sourceforge.net> |
| 25 | Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 |
| 26 | |
| 27 | *******************************************************************************/ |
| 28 | |
| 29 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| 30 | |
| 31 | #include <linux/prefetch.h> |
| 32 | #include "ixgb.h" |
| 33 | |
| 34 | char ixgb_driver_name[] = "ixgb"; |
| 35 | static char ixgb_driver_string[] = "Intel(R) PRO/10GbE Network Driver"; |
| 36 | |
| 37 | #define DRIVERNAPI "-NAPI" |
| 38 | #define DRV_VERSION "1.0.135-k2" DRIVERNAPI |
| 39 | const char ixgb_driver_version[] = DRV_VERSION; |
| 40 | static const char ixgb_copyright[] = "Copyright (c) 1999-2008 Intel Corporation."; |
| 41 | |
| 42 | #define IXGB_CB_LENGTH 256 |
| 43 | static unsigned int copybreak __read_mostly = IXGB_CB_LENGTH; |
| 44 | module_param(copybreak, uint, 0644); |
| 45 | MODULE_PARM_DESC(copybreak, |
| 46 | "Maximum size of packet that is copied to a new buffer on receive"); |
| 47 | |
| 48 | /* ixgb_pci_tbl - PCI Device ID Table |
| 49 | * |
| 50 | * Wildcard entries (PCI_ANY_ID) should come last |
| 51 | * Last entry must be all 0s |
| 52 | * |
| 53 | * { Vendor ID, Device ID, SubVendor ID, SubDevice ID, |
| 54 | * Class, Class Mask, private data (not used) } |
| 55 | */ |
| 56 | static DEFINE_PCI_DEVICE_TABLE(ixgb_pci_tbl) = { |
| 57 | {PCI_VENDOR_ID_INTEL, IXGB_DEVICE_ID_82597EX, |
| 58 | PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, |
| 59 | {PCI_VENDOR_ID_INTEL, IXGB_DEVICE_ID_82597EX_CX4, |
| 60 | PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, |
| 61 | {PCI_VENDOR_ID_INTEL, IXGB_DEVICE_ID_82597EX_SR, |
| 62 | PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, |
| 63 | {PCI_VENDOR_ID_INTEL, IXGB_DEVICE_ID_82597EX_LR, |
| 64 | PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, |
| 65 | |
| 66 | /* required last entry */ |
| 67 | {0,} |
| 68 | }; |
| 69 | |
| 70 | MODULE_DEVICE_TABLE(pci, ixgb_pci_tbl); |
| 71 | |
| 72 | /* Local Function Prototypes */ |
| 73 | static int ixgb_init_module(void); |
| 74 | static void ixgb_exit_module(void); |
| 75 | static int ixgb_probe(struct pci_dev *pdev, const struct pci_device_id *ent); |
| 76 | static void ixgb_remove(struct pci_dev *pdev); |
| 77 | static int ixgb_sw_init(struct ixgb_adapter *adapter); |
| 78 | static int ixgb_open(struct net_device *netdev); |
| 79 | static int ixgb_close(struct net_device *netdev); |
| 80 | static void ixgb_configure_tx(struct ixgb_adapter *adapter); |
| 81 | static void ixgb_configure_rx(struct ixgb_adapter *adapter); |
| 82 | static void ixgb_setup_rctl(struct ixgb_adapter *adapter); |
| 83 | static void ixgb_clean_tx_ring(struct ixgb_adapter *adapter); |
| 84 | static void ixgb_clean_rx_ring(struct ixgb_adapter *adapter); |
| 85 | static void ixgb_set_multi(struct net_device *netdev); |
| 86 | static void ixgb_watchdog(unsigned long data); |
| 87 | static netdev_tx_t ixgb_xmit_frame(struct sk_buff *skb, |
| 88 | struct net_device *netdev); |
| 89 | static struct net_device_stats *ixgb_get_stats(struct net_device *netdev); |
| 90 | static int ixgb_change_mtu(struct net_device *netdev, int new_mtu); |
| 91 | static int ixgb_set_mac(struct net_device *netdev, void *p); |
| 92 | static irqreturn_t ixgb_intr(int irq, void *data); |
| 93 | static bool ixgb_clean_tx_irq(struct ixgb_adapter *adapter); |
| 94 | |
| 95 | static int ixgb_clean(struct napi_struct *, int); |
| 96 | static bool ixgb_clean_rx_irq(struct ixgb_adapter *, int *, int); |
| 97 | static void ixgb_alloc_rx_buffers(struct ixgb_adapter *, int); |
| 98 | |
| 99 | static void ixgb_tx_timeout(struct net_device *dev); |
| 100 | static void ixgb_tx_timeout_task(struct work_struct *work); |
| 101 | |
| 102 | static void ixgb_vlan_strip_enable(struct ixgb_adapter *adapter); |
| 103 | static void ixgb_vlan_strip_disable(struct ixgb_adapter *adapter); |
| 104 | static int ixgb_vlan_rx_add_vid(struct net_device *netdev, |
| 105 | __be16 proto, u16 vid); |
| 106 | static int ixgb_vlan_rx_kill_vid(struct net_device *netdev, |
| 107 | __be16 proto, u16 vid); |
| 108 | static void ixgb_restore_vlan(struct ixgb_adapter *adapter); |
| 109 | |
| 110 | #ifdef CONFIG_NET_POLL_CONTROLLER |
| 111 | /* for netdump / net console */ |
| 112 | static void ixgb_netpoll(struct net_device *dev); |
| 113 | #endif |
| 114 | |
| 115 | static pci_ers_result_t ixgb_io_error_detected (struct pci_dev *pdev, |
| 116 | enum pci_channel_state state); |
| 117 | static pci_ers_result_t ixgb_io_slot_reset (struct pci_dev *pdev); |
| 118 | static void ixgb_io_resume (struct pci_dev *pdev); |
| 119 | |
| 120 | static const struct pci_error_handlers ixgb_err_handler = { |
| 121 | .error_detected = ixgb_io_error_detected, |
| 122 | .slot_reset = ixgb_io_slot_reset, |
| 123 | .resume = ixgb_io_resume, |
| 124 | }; |
| 125 | |
| 126 | static struct pci_driver ixgb_driver = { |
| 127 | .name = ixgb_driver_name, |
| 128 | .id_table = ixgb_pci_tbl, |
| 129 | .probe = ixgb_probe, |
| 130 | .remove = ixgb_remove, |
| 131 | .err_handler = &ixgb_err_handler |
| 132 | }; |
| 133 | |
| 134 | MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>"); |
| 135 | MODULE_DESCRIPTION("Intel(R) PRO/10GbE Network Driver"); |
| 136 | MODULE_LICENSE("GPL"); |
| 137 | MODULE_VERSION(DRV_VERSION); |
| 138 | |
| 139 | #define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV|NETIF_MSG_PROBE|NETIF_MSG_LINK) |
| 140 | static int debug = -1; |
| 141 | module_param(debug, int, 0); |
| 142 | MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)"); |
| 143 | |
| 144 | /** |
| 145 | * ixgb_init_module - Driver Registration Routine |
| 146 | * |
| 147 | * ixgb_init_module is the first routine called when the driver is |
| 148 | * loaded. All it does is register with the PCI subsystem. |
| 149 | **/ |
| 150 | |
| 151 | static int __init |
| 152 | ixgb_init_module(void) |
| 153 | { |
| 154 | pr_info("%s - version %s\n", ixgb_driver_string, ixgb_driver_version); |
| 155 | pr_info("%s\n", ixgb_copyright); |
| 156 | |
| 157 | return pci_register_driver(&ixgb_driver); |
| 158 | } |
| 159 | |
| 160 | module_init(ixgb_init_module); |
| 161 | |
| 162 | /** |
| 163 | * ixgb_exit_module - Driver Exit Cleanup Routine |
| 164 | * |
| 165 | * ixgb_exit_module is called just before the driver is removed |
| 166 | * from memory. |
| 167 | **/ |
| 168 | |
| 169 | static void __exit |
| 170 | ixgb_exit_module(void) |
| 171 | { |
| 172 | pci_unregister_driver(&ixgb_driver); |
| 173 | } |
| 174 | |
| 175 | module_exit(ixgb_exit_module); |
| 176 | |
| 177 | /** |
| 178 | * ixgb_irq_disable - Mask off interrupt generation on the NIC |
| 179 | * @adapter: board private structure |
| 180 | **/ |
| 181 | |
| 182 | static void |
| 183 | ixgb_irq_disable(struct ixgb_adapter *adapter) |
| 184 | { |
| 185 | IXGB_WRITE_REG(&adapter->hw, IMC, ~0); |
| 186 | IXGB_WRITE_FLUSH(&adapter->hw); |
| 187 | synchronize_irq(adapter->pdev->irq); |
| 188 | } |
| 189 | |
| 190 | /** |
| 191 | * ixgb_irq_enable - Enable default interrupt generation settings |
| 192 | * @adapter: board private structure |
| 193 | **/ |
| 194 | |
| 195 | static void |
| 196 | ixgb_irq_enable(struct ixgb_adapter *adapter) |
| 197 | { |
| 198 | u32 val = IXGB_INT_RXT0 | IXGB_INT_RXDMT0 | |
| 199 | IXGB_INT_TXDW | IXGB_INT_LSC; |
| 200 | if (adapter->hw.subsystem_vendor_id == PCI_VENDOR_ID_SUN) |
| 201 | val |= IXGB_INT_GPI0; |
| 202 | IXGB_WRITE_REG(&adapter->hw, IMS, val); |
| 203 | IXGB_WRITE_FLUSH(&adapter->hw); |
| 204 | } |
| 205 | |
| 206 | int |
| 207 | ixgb_up(struct ixgb_adapter *adapter) |
| 208 | { |
| 209 | struct net_device *netdev = adapter->netdev; |
| 210 | int err, irq_flags = IRQF_SHARED; |
| 211 | int max_frame = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH; |
| 212 | struct ixgb_hw *hw = &adapter->hw; |
| 213 | |
| 214 | /* hardware has been reset, we need to reload some things */ |
| 215 | |
| 216 | ixgb_rar_set(hw, netdev->dev_addr, 0); |
| 217 | ixgb_set_multi(netdev); |
| 218 | |
| 219 | ixgb_restore_vlan(adapter); |
| 220 | |
| 221 | ixgb_configure_tx(adapter); |
| 222 | ixgb_setup_rctl(adapter); |
| 223 | ixgb_configure_rx(adapter); |
| 224 | ixgb_alloc_rx_buffers(adapter, IXGB_DESC_UNUSED(&adapter->rx_ring)); |
| 225 | |
| 226 | /* disable interrupts and get the hardware into a known state */ |
| 227 | IXGB_WRITE_REG(&adapter->hw, IMC, 0xffffffff); |
| 228 | |
| 229 | /* only enable MSI if bus is in PCI-X mode */ |
| 230 | if (IXGB_READ_REG(&adapter->hw, STATUS) & IXGB_STATUS_PCIX_MODE) { |
| 231 | err = pci_enable_msi(adapter->pdev); |
| 232 | if (!err) { |
| 233 | adapter->have_msi = true; |
| 234 | irq_flags = 0; |
| 235 | } |
| 236 | /* proceed to try to request regular interrupt */ |
| 237 | } |
| 238 | |
| 239 | err = request_irq(adapter->pdev->irq, ixgb_intr, irq_flags, |
| 240 | netdev->name, netdev); |
| 241 | if (err) { |
| 242 | if (adapter->have_msi) |
| 243 | pci_disable_msi(adapter->pdev); |
| 244 | netif_err(adapter, probe, adapter->netdev, |
| 245 | "Unable to allocate interrupt Error: %d\n", err); |
| 246 | return err; |
| 247 | } |
| 248 | |
| 249 | if ((hw->max_frame_size != max_frame) || |
| 250 | (hw->max_frame_size != |
| 251 | (IXGB_READ_REG(hw, MFS) >> IXGB_MFS_SHIFT))) { |
| 252 | |
| 253 | hw->max_frame_size = max_frame; |
| 254 | |
| 255 | IXGB_WRITE_REG(hw, MFS, hw->max_frame_size << IXGB_MFS_SHIFT); |
| 256 | |
| 257 | if (hw->max_frame_size > |
| 258 | IXGB_MAX_ENET_FRAME_SIZE_WITHOUT_FCS + ENET_FCS_LENGTH) { |
| 259 | u32 ctrl0 = IXGB_READ_REG(hw, CTRL0); |
| 260 | |
| 261 | if (!(ctrl0 & IXGB_CTRL0_JFE)) { |
| 262 | ctrl0 |= IXGB_CTRL0_JFE; |
| 263 | IXGB_WRITE_REG(hw, CTRL0, ctrl0); |
| 264 | } |
| 265 | } |
| 266 | } |
| 267 | |
| 268 | clear_bit(__IXGB_DOWN, &adapter->flags); |
| 269 | |
| 270 | napi_enable(&adapter->napi); |
| 271 | ixgb_irq_enable(adapter); |
| 272 | |
| 273 | netif_wake_queue(netdev); |
| 274 | |
| 275 | mod_timer(&adapter->watchdog_timer, jiffies); |
| 276 | |
| 277 | return 0; |
| 278 | } |
| 279 | |
| 280 | void |
| 281 | ixgb_down(struct ixgb_adapter *adapter, bool kill_watchdog) |
| 282 | { |
| 283 | struct net_device *netdev = adapter->netdev; |
| 284 | |
| 285 | /* prevent the interrupt handler from restarting watchdog */ |
| 286 | set_bit(__IXGB_DOWN, &adapter->flags); |
| 287 | |
| 288 | napi_disable(&adapter->napi); |
| 289 | /* waiting for NAPI to complete can re-enable interrupts */ |
| 290 | ixgb_irq_disable(adapter); |
| 291 | free_irq(adapter->pdev->irq, netdev); |
| 292 | |
| 293 | if (adapter->have_msi) |
| 294 | pci_disable_msi(adapter->pdev); |
| 295 | |
| 296 | if (kill_watchdog) |
| 297 | del_timer_sync(&adapter->watchdog_timer); |
| 298 | |
| 299 | adapter->link_speed = 0; |
| 300 | adapter->link_duplex = 0; |
| 301 | netif_carrier_off(netdev); |
| 302 | netif_stop_queue(netdev); |
| 303 | |
| 304 | ixgb_reset(adapter); |
| 305 | ixgb_clean_tx_ring(adapter); |
| 306 | ixgb_clean_rx_ring(adapter); |
| 307 | } |
| 308 | |
| 309 | void |
| 310 | ixgb_reset(struct ixgb_adapter *adapter) |
| 311 | { |
| 312 | struct ixgb_hw *hw = &adapter->hw; |
| 313 | |
| 314 | ixgb_adapter_stop(hw); |
| 315 | if (!ixgb_init_hw(hw)) |
| 316 | netif_err(adapter, probe, adapter->netdev, "ixgb_init_hw failed\n"); |
| 317 | |
| 318 | /* restore frame size information */ |
| 319 | IXGB_WRITE_REG(hw, MFS, hw->max_frame_size << IXGB_MFS_SHIFT); |
| 320 | if (hw->max_frame_size > |
| 321 | IXGB_MAX_ENET_FRAME_SIZE_WITHOUT_FCS + ENET_FCS_LENGTH) { |
| 322 | u32 ctrl0 = IXGB_READ_REG(hw, CTRL0); |
| 323 | if (!(ctrl0 & IXGB_CTRL0_JFE)) { |
| 324 | ctrl0 |= IXGB_CTRL0_JFE; |
| 325 | IXGB_WRITE_REG(hw, CTRL0, ctrl0); |
| 326 | } |
| 327 | } |
| 328 | } |
| 329 | |
| 330 | static netdev_features_t |
| 331 | ixgb_fix_features(struct net_device *netdev, netdev_features_t features) |
| 332 | { |
| 333 | /* |
| 334 | * Tx VLAN insertion does not work per HW design when Rx stripping is |
| 335 | * disabled. |
| 336 | */ |
| 337 | if (!(features & NETIF_F_HW_VLAN_CTAG_RX)) |
| 338 | features &= ~NETIF_F_HW_VLAN_CTAG_TX; |
| 339 | |
| 340 | return features; |
| 341 | } |
| 342 | |
| 343 | static int |
| 344 | ixgb_set_features(struct net_device *netdev, netdev_features_t features) |
| 345 | { |
| 346 | struct ixgb_adapter *adapter = netdev_priv(netdev); |
| 347 | netdev_features_t changed = features ^ netdev->features; |
| 348 | |
| 349 | if (!(changed & (NETIF_F_RXCSUM|NETIF_F_HW_VLAN_CTAG_RX))) |
| 350 | return 0; |
| 351 | |
| 352 | adapter->rx_csum = !!(features & NETIF_F_RXCSUM); |
| 353 | |
| 354 | if (netif_running(netdev)) { |
| 355 | ixgb_down(adapter, true); |
| 356 | ixgb_up(adapter); |
| 357 | ixgb_set_speed_duplex(netdev); |
| 358 | } else |
| 359 | ixgb_reset(adapter); |
| 360 | |
| 361 | return 0; |
| 362 | } |
| 363 | |
| 364 | |
| 365 | static const struct net_device_ops ixgb_netdev_ops = { |
| 366 | .ndo_open = ixgb_open, |
| 367 | .ndo_stop = ixgb_close, |
| 368 | .ndo_start_xmit = ixgb_xmit_frame, |
| 369 | .ndo_get_stats = ixgb_get_stats, |
| 370 | .ndo_set_rx_mode = ixgb_set_multi, |
| 371 | .ndo_validate_addr = eth_validate_addr, |
| 372 | .ndo_set_mac_address = ixgb_set_mac, |
| 373 | .ndo_change_mtu = ixgb_change_mtu, |
| 374 | .ndo_tx_timeout = ixgb_tx_timeout, |
| 375 | .ndo_vlan_rx_add_vid = ixgb_vlan_rx_add_vid, |
| 376 | .ndo_vlan_rx_kill_vid = ixgb_vlan_rx_kill_vid, |
| 377 | #ifdef CONFIG_NET_POLL_CONTROLLER |
| 378 | .ndo_poll_controller = ixgb_netpoll, |
| 379 | #endif |
| 380 | .ndo_fix_features = ixgb_fix_features, |
| 381 | .ndo_set_features = ixgb_set_features, |
| 382 | }; |
| 383 | |
| 384 | /** |
| 385 | * ixgb_probe - Device Initialization Routine |
| 386 | * @pdev: PCI device information struct |
| 387 | * @ent: entry in ixgb_pci_tbl |
| 388 | * |
| 389 | * Returns 0 on success, negative on failure |
| 390 | * |
| 391 | * ixgb_probe initializes an adapter identified by a pci_dev structure. |
| 392 | * The OS initialization, configuring of the adapter private structure, |
| 393 | * and a hardware reset occur. |
| 394 | **/ |
| 395 | |
| 396 | static int |
| 397 | ixgb_probe(struct pci_dev *pdev, const struct pci_device_id *ent) |
| 398 | { |
| 399 | struct net_device *netdev = NULL; |
| 400 | struct ixgb_adapter *adapter; |
| 401 | static int cards_found = 0; |
| 402 | int pci_using_dac; |
| 403 | int i; |
| 404 | int err; |
| 405 | |
| 406 | err = pci_enable_device(pdev); |
| 407 | if (err) |
| 408 | return err; |
| 409 | |
| 410 | pci_using_dac = 0; |
| 411 | err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(64)); |
| 412 | if (!err) { |
| 413 | err = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64)); |
| 414 | if (!err) |
| 415 | pci_using_dac = 1; |
| 416 | } else { |
| 417 | err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32)); |
| 418 | if (err) { |
| 419 | err = dma_set_coherent_mask(&pdev->dev, |
| 420 | DMA_BIT_MASK(32)); |
| 421 | if (err) { |
| 422 | pr_err("No usable DMA configuration, aborting\n"); |
| 423 | goto err_dma_mask; |
| 424 | } |
| 425 | } |
| 426 | } |
| 427 | |
| 428 | err = pci_request_regions(pdev, ixgb_driver_name); |
| 429 | if (err) |
| 430 | goto err_request_regions; |
| 431 | |
| 432 | pci_set_master(pdev); |
| 433 | |
| 434 | netdev = alloc_etherdev(sizeof(struct ixgb_adapter)); |
| 435 | if (!netdev) { |
| 436 | err = -ENOMEM; |
| 437 | goto err_alloc_etherdev; |
| 438 | } |
| 439 | |
| 440 | SET_NETDEV_DEV(netdev, &pdev->dev); |
| 441 | |
| 442 | pci_set_drvdata(pdev, netdev); |
| 443 | adapter = netdev_priv(netdev); |
| 444 | adapter->netdev = netdev; |
| 445 | adapter->pdev = pdev; |
| 446 | adapter->hw.back = adapter; |
| 447 | adapter->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE); |
| 448 | |
| 449 | adapter->hw.hw_addr = pci_ioremap_bar(pdev, BAR_0); |
| 450 | if (!adapter->hw.hw_addr) { |
| 451 | err = -EIO; |
| 452 | goto err_ioremap; |
| 453 | } |
| 454 | |
| 455 | for (i = BAR_1; i <= BAR_5; i++) { |
| 456 | if (pci_resource_len(pdev, i) == 0) |
| 457 | continue; |
| 458 | if (pci_resource_flags(pdev, i) & IORESOURCE_IO) { |
| 459 | adapter->hw.io_base = pci_resource_start(pdev, i); |
| 460 | break; |
| 461 | } |
| 462 | } |
| 463 | |
| 464 | netdev->netdev_ops = &ixgb_netdev_ops; |
| 465 | ixgb_set_ethtool_ops(netdev); |
| 466 | netdev->watchdog_timeo = 5 * HZ; |
| 467 | netif_napi_add(netdev, &adapter->napi, ixgb_clean, 64); |
| 468 | |
| 469 | strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1); |
| 470 | |
| 471 | adapter->bd_number = cards_found; |
| 472 | adapter->link_speed = 0; |
| 473 | adapter->link_duplex = 0; |
| 474 | |
| 475 | /* setup the private structure */ |
| 476 | |
| 477 | err = ixgb_sw_init(adapter); |
| 478 | if (err) |
| 479 | goto err_sw_init; |
| 480 | |
| 481 | netdev->hw_features = NETIF_F_SG | |
| 482 | NETIF_F_TSO | |
| 483 | NETIF_F_HW_CSUM | |
| 484 | NETIF_F_HW_VLAN_CTAG_TX | |
| 485 | NETIF_F_HW_VLAN_CTAG_RX; |
| 486 | netdev->features = netdev->hw_features | |
| 487 | NETIF_F_HW_VLAN_CTAG_FILTER; |
| 488 | netdev->hw_features |= NETIF_F_RXCSUM; |
| 489 | |
| 490 | if (pci_using_dac) { |
| 491 | netdev->features |= NETIF_F_HIGHDMA; |
| 492 | netdev->vlan_features |= NETIF_F_HIGHDMA; |
| 493 | } |
| 494 | |
| 495 | /* make sure the EEPROM is good */ |
| 496 | |
| 497 | if (!ixgb_validate_eeprom_checksum(&adapter->hw)) { |
| 498 | netif_err(adapter, probe, adapter->netdev, |
| 499 | "The EEPROM Checksum Is Not Valid\n"); |
| 500 | err = -EIO; |
| 501 | goto err_eeprom; |
| 502 | } |
| 503 | |
| 504 | ixgb_get_ee_mac_addr(&adapter->hw, netdev->dev_addr); |
| 505 | |
| 506 | if (!is_valid_ether_addr(netdev->dev_addr)) { |
| 507 | netif_err(adapter, probe, adapter->netdev, "Invalid MAC Address\n"); |
| 508 | err = -EIO; |
| 509 | goto err_eeprom; |
| 510 | } |
| 511 | |
| 512 | adapter->part_num = ixgb_get_ee_pba_number(&adapter->hw); |
| 513 | |
| 514 | init_timer(&adapter->watchdog_timer); |
| 515 | adapter->watchdog_timer.function = ixgb_watchdog; |
| 516 | adapter->watchdog_timer.data = (unsigned long)adapter; |
| 517 | |
| 518 | INIT_WORK(&adapter->tx_timeout_task, ixgb_tx_timeout_task); |
| 519 | |
| 520 | strcpy(netdev->name, "eth%d"); |
| 521 | err = register_netdev(netdev); |
| 522 | if (err) |
| 523 | goto err_register; |
| 524 | |
| 525 | /* carrier off reporting is important to ethtool even BEFORE open */ |
| 526 | netif_carrier_off(netdev); |
| 527 | |
| 528 | netif_info(adapter, probe, adapter->netdev, |
| 529 | "Intel(R) PRO/10GbE Network Connection\n"); |
| 530 | ixgb_check_options(adapter); |
| 531 | /* reset the hardware with the new settings */ |
| 532 | |
| 533 | ixgb_reset(adapter); |
| 534 | |
| 535 | cards_found++; |
| 536 | return 0; |
| 537 | |
| 538 | err_register: |
| 539 | err_sw_init: |
| 540 | err_eeprom: |
| 541 | iounmap(adapter->hw.hw_addr); |
| 542 | err_ioremap: |
| 543 | free_netdev(netdev); |
| 544 | err_alloc_etherdev: |
| 545 | pci_release_regions(pdev); |
| 546 | err_request_regions: |
| 547 | err_dma_mask: |
| 548 | pci_disable_device(pdev); |
| 549 | return err; |
| 550 | } |
| 551 | |
| 552 | /** |
| 553 | * ixgb_remove - Device Removal Routine |
| 554 | * @pdev: PCI device information struct |
| 555 | * |
| 556 | * ixgb_remove is called by the PCI subsystem to alert the driver |
| 557 | * that it should release a PCI device. The could be caused by a |
| 558 | * Hot-Plug event, or because the driver is going to be removed from |
| 559 | * memory. |
| 560 | **/ |
| 561 | |
| 562 | static void |
| 563 | ixgb_remove(struct pci_dev *pdev) |
| 564 | { |
| 565 | struct net_device *netdev = pci_get_drvdata(pdev); |
| 566 | struct ixgb_adapter *adapter = netdev_priv(netdev); |
| 567 | |
| 568 | cancel_work_sync(&adapter->tx_timeout_task); |
| 569 | |
| 570 | unregister_netdev(netdev); |
| 571 | |
| 572 | iounmap(adapter->hw.hw_addr); |
| 573 | pci_release_regions(pdev); |
| 574 | |
| 575 | free_netdev(netdev); |
| 576 | pci_disable_device(pdev); |
| 577 | } |
| 578 | |
| 579 | /** |
| 580 | * ixgb_sw_init - Initialize general software structures (struct ixgb_adapter) |
| 581 | * @adapter: board private structure to initialize |
| 582 | * |
| 583 | * ixgb_sw_init initializes the Adapter private data structure. |
| 584 | * Fields are initialized based on PCI device information and |
| 585 | * OS network device settings (MTU size). |
| 586 | **/ |
| 587 | |
| 588 | static int |
| 589 | ixgb_sw_init(struct ixgb_adapter *adapter) |
| 590 | { |
| 591 | struct ixgb_hw *hw = &adapter->hw; |
| 592 | struct net_device *netdev = adapter->netdev; |
| 593 | struct pci_dev *pdev = adapter->pdev; |
| 594 | |
| 595 | /* PCI config space info */ |
| 596 | |
| 597 | hw->vendor_id = pdev->vendor; |
| 598 | hw->device_id = pdev->device; |
| 599 | hw->subsystem_vendor_id = pdev->subsystem_vendor; |
| 600 | hw->subsystem_id = pdev->subsystem_device; |
| 601 | |
| 602 | hw->max_frame_size = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH; |
| 603 | adapter->rx_buffer_len = hw->max_frame_size + 8; /* + 8 for errata */ |
| 604 | |
| 605 | if ((hw->device_id == IXGB_DEVICE_ID_82597EX) || |
| 606 | (hw->device_id == IXGB_DEVICE_ID_82597EX_CX4) || |
| 607 | (hw->device_id == IXGB_DEVICE_ID_82597EX_LR) || |
| 608 | (hw->device_id == IXGB_DEVICE_ID_82597EX_SR)) |
| 609 | hw->mac_type = ixgb_82597; |
| 610 | else { |
| 611 | /* should never have loaded on this device */ |
| 612 | netif_err(adapter, probe, adapter->netdev, "unsupported device id\n"); |
| 613 | } |
| 614 | |
| 615 | /* enable flow control to be programmed */ |
| 616 | hw->fc.send_xon = 1; |
| 617 | |
| 618 | set_bit(__IXGB_DOWN, &adapter->flags); |
| 619 | return 0; |
| 620 | } |
| 621 | |
| 622 | /** |
| 623 | * ixgb_open - Called when a network interface is made active |
| 624 | * @netdev: network interface device structure |
| 625 | * |
| 626 | * Returns 0 on success, negative value on failure |
| 627 | * |
| 628 | * The open entry point is called when a network interface is made |
| 629 | * active by the system (IFF_UP). At this point all resources needed |
| 630 | * for transmit and receive operations are allocated, the interrupt |
| 631 | * handler is registered with the OS, the watchdog timer is started, |
| 632 | * and the stack is notified that the interface is ready. |
| 633 | **/ |
| 634 | |
| 635 | static int |
| 636 | ixgb_open(struct net_device *netdev) |
| 637 | { |
| 638 | struct ixgb_adapter *adapter = netdev_priv(netdev); |
| 639 | int err; |
| 640 | |
| 641 | /* allocate transmit descriptors */ |
| 642 | err = ixgb_setup_tx_resources(adapter); |
| 643 | if (err) |
| 644 | goto err_setup_tx; |
| 645 | |
| 646 | netif_carrier_off(netdev); |
| 647 | |
| 648 | /* allocate receive descriptors */ |
| 649 | |
| 650 | err = ixgb_setup_rx_resources(adapter); |
| 651 | if (err) |
| 652 | goto err_setup_rx; |
| 653 | |
| 654 | err = ixgb_up(adapter); |
| 655 | if (err) |
| 656 | goto err_up; |
| 657 | |
| 658 | netif_start_queue(netdev); |
| 659 | |
| 660 | return 0; |
| 661 | |
| 662 | err_up: |
| 663 | ixgb_free_rx_resources(adapter); |
| 664 | err_setup_rx: |
| 665 | ixgb_free_tx_resources(adapter); |
| 666 | err_setup_tx: |
| 667 | ixgb_reset(adapter); |
| 668 | |
| 669 | return err; |
| 670 | } |
| 671 | |
| 672 | /** |
| 673 | * ixgb_close - Disables a network interface |
| 674 | * @netdev: network interface device structure |
| 675 | * |
| 676 | * Returns 0, this is not allowed to fail |
| 677 | * |
| 678 | * The close entry point is called when an interface is de-activated |
| 679 | * by the OS. The hardware is still under the drivers control, but |
| 680 | * needs to be disabled. A global MAC reset is issued to stop the |
| 681 | * hardware, and all transmit and receive resources are freed. |
| 682 | **/ |
| 683 | |
| 684 | static int |
| 685 | ixgb_close(struct net_device *netdev) |
| 686 | { |
| 687 | struct ixgb_adapter *adapter = netdev_priv(netdev); |
| 688 | |
| 689 | ixgb_down(adapter, true); |
| 690 | |
| 691 | ixgb_free_tx_resources(adapter); |
| 692 | ixgb_free_rx_resources(adapter); |
| 693 | |
| 694 | return 0; |
| 695 | } |
| 696 | |
| 697 | /** |
| 698 | * ixgb_setup_tx_resources - allocate Tx resources (Descriptors) |
| 699 | * @adapter: board private structure |
| 700 | * |
| 701 | * Return 0 on success, negative on failure |
| 702 | **/ |
| 703 | |
| 704 | int |
| 705 | ixgb_setup_tx_resources(struct ixgb_adapter *adapter) |
| 706 | { |
| 707 | struct ixgb_desc_ring *txdr = &adapter->tx_ring; |
| 708 | struct pci_dev *pdev = adapter->pdev; |
| 709 | int size; |
| 710 | |
| 711 | size = sizeof(struct ixgb_buffer) * txdr->count; |
| 712 | txdr->buffer_info = vzalloc(size); |
| 713 | if (!txdr->buffer_info) |
| 714 | return -ENOMEM; |
| 715 | |
| 716 | /* round up to nearest 4K */ |
| 717 | |
| 718 | txdr->size = txdr->count * sizeof(struct ixgb_tx_desc); |
| 719 | txdr->size = ALIGN(txdr->size, 4096); |
| 720 | |
| 721 | txdr->desc = dma_alloc_coherent(&pdev->dev, txdr->size, &txdr->dma, |
| 722 | GFP_KERNEL | __GFP_ZERO); |
| 723 | if (!txdr->desc) { |
| 724 | vfree(txdr->buffer_info); |
| 725 | return -ENOMEM; |
| 726 | } |
| 727 | |
| 728 | txdr->next_to_use = 0; |
| 729 | txdr->next_to_clean = 0; |
| 730 | |
| 731 | return 0; |
| 732 | } |
| 733 | |
| 734 | /** |
| 735 | * ixgb_configure_tx - Configure 82597 Transmit Unit after Reset. |
| 736 | * @adapter: board private structure |
| 737 | * |
| 738 | * Configure the Tx unit of the MAC after a reset. |
| 739 | **/ |
| 740 | |
| 741 | static void |
| 742 | ixgb_configure_tx(struct ixgb_adapter *adapter) |
| 743 | { |
| 744 | u64 tdba = adapter->tx_ring.dma; |
| 745 | u32 tdlen = adapter->tx_ring.count * sizeof(struct ixgb_tx_desc); |
| 746 | u32 tctl; |
| 747 | struct ixgb_hw *hw = &adapter->hw; |
| 748 | |
| 749 | /* Setup the Base and Length of the Tx Descriptor Ring |
| 750 | * tx_ring.dma can be either a 32 or 64 bit value |
| 751 | */ |
| 752 | |
| 753 | IXGB_WRITE_REG(hw, TDBAL, (tdba & 0x00000000ffffffffULL)); |
| 754 | IXGB_WRITE_REG(hw, TDBAH, (tdba >> 32)); |
| 755 | |
| 756 | IXGB_WRITE_REG(hw, TDLEN, tdlen); |
| 757 | |
| 758 | /* Setup the HW Tx Head and Tail descriptor pointers */ |
| 759 | |
| 760 | IXGB_WRITE_REG(hw, TDH, 0); |
| 761 | IXGB_WRITE_REG(hw, TDT, 0); |
| 762 | |
| 763 | /* don't set up txdctl, it induces performance problems if configured |
| 764 | * incorrectly */ |
| 765 | /* Set the Tx Interrupt Delay register */ |
| 766 | |
| 767 | IXGB_WRITE_REG(hw, TIDV, adapter->tx_int_delay); |
| 768 | |
| 769 | /* Program the Transmit Control Register */ |
| 770 | |
| 771 | tctl = IXGB_TCTL_TCE | IXGB_TCTL_TXEN | IXGB_TCTL_TPDE; |
| 772 | IXGB_WRITE_REG(hw, TCTL, tctl); |
| 773 | |
| 774 | /* Setup Transmit Descriptor Settings for this adapter */ |
| 775 | adapter->tx_cmd_type = |
| 776 | IXGB_TX_DESC_TYPE | |
| 777 | (adapter->tx_int_delay_enable ? IXGB_TX_DESC_CMD_IDE : 0); |
| 778 | } |
| 779 | |
| 780 | /** |
| 781 | * ixgb_setup_rx_resources - allocate Rx resources (Descriptors) |
| 782 | * @adapter: board private structure |
| 783 | * |
| 784 | * Returns 0 on success, negative on failure |
| 785 | **/ |
| 786 | |
| 787 | int |
| 788 | ixgb_setup_rx_resources(struct ixgb_adapter *adapter) |
| 789 | { |
| 790 | struct ixgb_desc_ring *rxdr = &adapter->rx_ring; |
| 791 | struct pci_dev *pdev = adapter->pdev; |
| 792 | int size; |
| 793 | |
| 794 | size = sizeof(struct ixgb_buffer) * rxdr->count; |
| 795 | rxdr->buffer_info = vzalloc(size); |
| 796 | if (!rxdr->buffer_info) |
| 797 | return -ENOMEM; |
| 798 | |
| 799 | /* Round up to nearest 4K */ |
| 800 | |
| 801 | rxdr->size = rxdr->count * sizeof(struct ixgb_rx_desc); |
| 802 | rxdr->size = ALIGN(rxdr->size, 4096); |
| 803 | |
| 804 | rxdr->desc = dma_alloc_coherent(&pdev->dev, rxdr->size, &rxdr->dma, |
| 805 | GFP_KERNEL); |
| 806 | |
| 807 | if (!rxdr->desc) { |
| 808 | vfree(rxdr->buffer_info); |
| 809 | return -ENOMEM; |
| 810 | } |
| 811 | memset(rxdr->desc, 0, rxdr->size); |
| 812 | |
| 813 | rxdr->next_to_clean = 0; |
| 814 | rxdr->next_to_use = 0; |
| 815 | |
| 816 | return 0; |
| 817 | } |
| 818 | |
| 819 | /** |
| 820 | * ixgb_setup_rctl - configure the receive control register |
| 821 | * @adapter: Board private structure |
| 822 | **/ |
| 823 | |
| 824 | static void |
| 825 | ixgb_setup_rctl(struct ixgb_adapter *adapter) |
| 826 | { |
| 827 | u32 rctl; |
| 828 | |
| 829 | rctl = IXGB_READ_REG(&adapter->hw, RCTL); |
| 830 | |
| 831 | rctl &= ~(3 << IXGB_RCTL_MO_SHIFT); |
| 832 | |
| 833 | rctl |= |
| 834 | IXGB_RCTL_BAM | IXGB_RCTL_RDMTS_1_2 | |
| 835 | IXGB_RCTL_RXEN | IXGB_RCTL_CFF | |
| 836 | (adapter->hw.mc_filter_type << IXGB_RCTL_MO_SHIFT); |
| 837 | |
| 838 | rctl |= IXGB_RCTL_SECRC; |
| 839 | |
| 840 | if (adapter->rx_buffer_len <= IXGB_RXBUFFER_2048) |
| 841 | rctl |= IXGB_RCTL_BSIZE_2048; |
| 842 | else if (adapter->rx_buffer_len <= IXGB_RXBUFFER_4096) |
| 843 | rctl |= IXGB_RCTL_BSIZE_4096; |
| 844 | else if (adapter->rx_buffer_len <= IXGB_RXBUFFER_8192) |
| 845 | rctl |= IXGB_RCTL_BSIZE_8192; |
| 846 | else if (adapter->rx_buffer_len <= IXGB_RXBUFFER_16384) |
| 847 | rctl |= IXGB_RCTL_BSIZE_16384; |
| 848 | |
| 849 | IXGB_WRITE_REG(&adapter->hw, RCTL, rctl); |
| 850 | } |
| 851 | |
| 852 | /** |
| 853 | * ixgb_configure_rx - Configure 82597 Receive Unit after Reset. |
| 854 | * @adapter: board private structure |
| 855 | * |
| 856 | * Configure the Rx unit of the MAC after a reset. |
| 857 | **/ |
| 858 | |
| 859 | static void |
| 860 | ixgb_configure_rx(struct ixgb_adapter *adapter) |
| 861 | { |
| 862 | u64 rdba = adapter->rx_ring.dma; |
| 863 | u32 rdlen = adapter->rx_ring.count * sizeof(struct ixgb_rx_desc); |
| 864 | struct ixgb_hw *hw = &adapter->hw; |
| 865 | u32 rctl; |
| 866 | u32 rxcsum; |
| 867 | |
| 868 | /* make sure receives are disabled while setting up the descriptors */ |
| 869 | |
| 870 | rctl = IXGB_READ_REG(hw, RCTL); |
| 871 | IXGB_WRITE_REG(hw, RCTL, rctl & ~IXGB_RCTL_RXEN); |
| 872 | |
| 873 | /* set the Receive Delay Timer Register */ |
| 874 | |
| 875 | IXGB_WRITE_REG(hw, RDTR, adapter->rx_int_delay); |
| 876 | |
| 877 | /* Setup the Base and Length of the Rx Descriptor Ring */ |
| 878 | |
| 879 | IXGB_WRITE_REG(hw, RDBAL, (rdba & 0x00000000ffffffffULL)); |
| 880 | IXGB_WRITE_REG(hw, RDBAH, (rdba >> 32)); |
| 881 | |
| 882 | IXGB_WRITE_REG(hw, RDLEN, rdlen); |
| 883 | |
| 884 | /* Setup the HW Rx Head and Tail Descriptor Pointers */ |
| 885 | IXGB_WRITE_REG(hw, RDH, 0); |
| 886 | IXGB_WRITE_REG(hw, RDT, 0); |
| 887 | |
| 888 | /* due to the hardware errata with RXDCTL, we are unable to use any of |
| 889 | * the performance enhancing features of it without causing other |
| 890 | * subtle bugs, some of the bugs could include receive length |
| 891 | * corruption at high data rates (WTHRESH > 0) and/or receive |
| 892 | * descriptor ring irregularites (particularly in hardware cache) */ |
| 893 | IXGB_WRITE_REG(hw, RXDCTL, 0); |
| 894 | |
| 895 | /* Enable Receive Checksum Offload for TCP and UDP */ |
| 896 | if (adapter->rx_csum) { |
| 897 | rxcsum = IXGB_READ_REG(hw, RXCSUM); |
| 898 | rxcsum |= IXGB_RXCSUM_TUOFL; |
| 899 | IXGB_WRITE_REG(hw, RXCSUM, rxcsum); |
| 900 | } |
| 901 | |
| 902 | /* Enable Receives */ |
| 903 | |
| 904 | IXGB_WRITE_REG(hw, RCTL, rctl); |
| 905 | } |
| 906 | |
| 907 | /** |
| 908 | * ixgb_free_tx_resources - Free Tx Resources |
| 909 | * @adapter: board private structure |
| 910 | * |
| 911 | * Free all transmit software resources |
| 912 | **/ |
| 913 | |
| 914 | void |
| 915 | ixgb_free_tx_resources(struct ixgb_adapter *adapter) |
| 916 | { |
| 917 | struct pci_dev *pdev = adapter->pdev; |
| 918 | |
| 919 | ixgb_clean_tx_ring(adapter); |
| 920 | |
| 921 | vfree(adapter->tx_ring.buffer_info); |
| 922 | adapter->tx_ring.buffer_info = NULL; |
| 923 | |
| 924 | dma_free_coherent(&pdev->dev, adapter->tx_ring.size, |
| 925 | adapter->tx_ring.desc, adapter->tx_ring.dma); |
| 926 | |
| 927 | adapter->tx_ring.desc = NULL; |
| 928 | } |
| 929 | |
| 930 | static void |
| 931 | ixgb_unmap_and_free_tx_resource(struct ixgb_adapter *adapter, |
| 932 | struct ixgb_buffer *buffer_info) |
| 933 | { |
| 934 | if (buffer_info->dma) { |
| 935 | if (buffer_info->mapped_as_page) |
| 936 | dma_unmap_page(&adapter->pdev->dev, buffer_info->dma, |
| 937 | buffer_info->length, DMA_TO_DEVICE); |
| 938 | else |
| 939 | dma_unmap_single(&adapter->pdev->dev, buffer_info->dma, |
| 940 | buffer_info->length, DMA_TO_DEVICE); |
| 941 | buffer_info->dma = 0; |
| 942 | } |
| 943 | |
| 944 | if (buffer_info->skb) { |
| 945 | dev_kfree_skb_any(buffer_info->skb); |
| 946 | buffer_info->skb = NULL; |
| 947 | } |
| 948 | buffer_info->time_stamp = 0; |
| 949 | /* these fields must always be initialized in tx |
| 950 | * buffer_info->length = 0; |
| 951 | * buffer_info->next_to_watch = 0; */ |
| 952 | } |
| 953 | |
| 954 | /** |
| 955 | * ixgb_clean_tx_ring - Free Tx Buffers |
| 956 | * @adapter: board private structure |
| 957 | **/ |
| 958 | |
| 959 | static void |
| 960 | ixgb_clean_tx_ring(struct ixgb_adapter *adapter) |
| 961 | { |
| 962 | struct ixgb_desc_ring *tx_ring = &adapter->tx_ring; |
| 963 | struct ixgb_buffer *buffer_info; |
| 964 | unsigned long size; |
| 965 | unsigned int i; |
| 966 | |
| 967 | /* Free all the Tx ring sk_buffs */ |
| 968 | |
| 969 | for (i = 0; i < tx_ring->count; i++) { |
| 970 | buffer_info = &tx_ring->buffer_info[i]; |
| 971 | ixgb_unmap_and_free_tx_resource(adapter, buffer_info); |
| 972 | } |
| 973 | |
| 974 | size = sizeof(struct ixgb_buffer) * tx_ring->count; |
| 975 | memset(tx_ring->buffer_info, 0, size); |
| 976 | |
| 977 | /* Zero out the descriptor ring */ |
| 978 | |
| 979 | memset(tx_ring->desc, 0, tx_ring->size); |
| 980 | |
| 981 | tx_ring->next_to_use = 0; |
| 982 | tx_ring->next_to_clean = 0; |
| 983 | |
| 984 | IXGB_WRITE_REG(&adapter->hw, TDH, 0); |
| 985 | IXGB_WRITE_REG(&adapter->hw, TDT, 0); |
| 986 | } |
| 987 | |
| 988 | /** |
| 989 | * ixgb_free_rx_resources - Free Rx Resources |
| 990 | * @adapter: board private structure |
| 991 | * |
| 992 | * Free all receive software resources |
| 993 | **/ |
| 994 | |
| 995 | void |
| 996 | ixgb_free_rx_resources(struct ixgb_adapter *adapter) |
| 997 | { |
| 998 | struct ixgb_desc_ring *rx_ring = &adapter->rx_ring; |
| 999 | struct pci_dev *pdev = adapter->pdev; |
| 1000 | |
| 1001 | ixgb_clean_rx_ring(adapter); |
| 1002 | |
| 1003 | vfree(rx_ring->buffer_info); |
| 1004 | rx_ring->buffer_info = NULL; |
| 1005 | |
| 1006 | dma_free_coherent(&pdev->dev, rx_ring->size, rx_ring->desc, |
| 1007 | rx_ring->dma); |
| 1008 | |
| 1009 | rx_ring->desc = NULL; |
| 1010 | } |
| 1011 | |
| 1012 | /** |
| 1013 | * ixgb_clean_rx_ring - Free Rx Buffers |
| 1014 | * @adapter: board private structure |
| 1015 | **/ |
| 1016 | |
| 1017 | static void |
| 1018 | ixgb_clean_rx_ring(struct ixgb_adapter *adapter) |
| 1019 | { |
| 1020 | struct ixgb_desc_ring *rx_ring = &adapter->rx_ring; |
| 1021 | struct ixgb_buffer *buffer_info; |
| 1022 | struct pci_dev *pdev = adapter->pdev; |
| 1023 | unsigned long size; |
| 1024 | unsigned int i; |
| 1025 | |
| 1026 | /* Free all the Rx ring sk_buffs */ |
| 1027 | |
| 1028 | for (i = 0; i < rx_ring->count; i++) { |
| 1029 | buffer_info = &rx_ring->buffer_info[i]; |
| 1030 | if (buffer_info->dma) { |
| 1031 | dma_unmap_single(&pdev->dev, |
| 1032 | buffer_info->dma, |
| 1033 | buffer_info->length, |
| 1034 | DMA_FROM_DEVICE); |
| 1035 | buffer_info->dma = 0; |
| 1036 | buffer_info->length = 0; |
| 1037 | } |
| 1038 | |
| 1039 | if (buffer_info->skb) { |
| 1040 | dev_kfree_skb(buffer_info->skb); |
| 1041 | buffer_info->skb = NULL; |
| 1042 | } |
| 1043 | } |
| 1044 | |
| 1045 | size = sizeof(struct ixgb_buffer) * rx_ring->count; |
| 1046 | memset(rx_ring->buffer_info, 0, size); |
| 1047 | |
| 1048 | /* Zero out the descriptor ring */ |
| 1049 | |
| 1050 | memset(rx_ring->desc, 0, rx_ring->size); |
| 1051 | |
| 1052 | rx_ring->next_to_clean = 0; |
| 1053 | rx_ring->next_to_use = 0; |
| 1054 | |
| 1055 | IXGB_WRITE_REG(&adapter->hw, RDH, 0); |
| 1056 | IXGB_WRITE_REG(&adapter->hw, RDT, 0); |
| 1057 | } |
| 1058 | |
| 1059 | /** |
| 1060 | * ixgb_set_mac - Change the Ethernet Address of the NIC |
| 1061 | * @netdev: network interface device structure |
| 1062 | * @p: pointer to an address structure |
| 1063 | * |
| 1064 | * Returns 0 on success, negative on failure |
| 1065 | **/ |
| 1066 | |
| 1067 | static int |
| 1068 | ixgb_set_mac(struct net_device *netdev, void *p) |
| 1069 | { |
| 1070 | struct ixgb_adapter *adapter = netdev_priv(netdev); |
| 1071 | struct sockaddr *addr = p; |
| 1072 | |
| 1073 | if (!is_valid_ether_addr(addr->sa_data)) |
| 1074 | return -EADDRNOTAVAIL; |
| 1075 | |
| 1076 | memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len); |
| 1077 | |
| 1078 | ixgb_rar_set(&adapter->hw, addr->sa_data, 0); |
| 1079 | |
| 1080 | return 0; |
| 1081 | } |
| 1082 | |
| 1083 | /** |
| 1084 | * ixgb_set_multi - Multicast and Promiscuous mode set |
| 1085 | * @netdev: network interface device structure |
| 1086 | * |
| 1087 | * The set_multi entry point is called whenever the multicast address |
| 1088 | * list or the network interface flags are updated. This routine is |
| 1089 | * responsible for configuring the hardware for proper multicast, |
| 1090 | * promiscuous mode, and all-multi behavior. |
| 1091 | **/ |
| 1092 | |
| 1093 | static void |
| 1094 | ixgb_set_multi(struct net_device *netdev) |
| 1095 | { |
| 1096 | struct ixgb_adapter *adapter = netdev_priv(netdev); |
| 1097 | struct ixgb_hw *hw = &adapter->hw; |
| 1098 | struct netdev_hw_addr *ha; |
| 1099 | u32 rctl; |
| 1100 | |
| 1101 | /* Check for Promiscuous and All Multicast modes */ |
| 1102 | |
| 1103 | rctl = IXGB_READ_REG(hw, RCTL); |
| 1104 | |
| 1105 | if (netdev->flags & IFF_PROMISC) { |
| 1106 | rctl |= (IXGB_RCTL_UPE | IXGB_RCTL_MPE); |
| 1107 | /* disable VLAN filtering */ |
| 1108 | rctl &= ~IXGB_RCTL_CFIEN; |
| 1109 | rctl &= ~IXGB_RCTL_VFE; |
| 1110 | } else { |
| 1111 | if (netdev->flags & IFF_ALLMULTI) { |
| 1112 | rctl |= IXGB_RCTL_MPE; |
| 1113 | rctl &= ~IXGB_RCTL_UPE; |
| 1114 | } else { |
| 1115 | rctl &= ~(IXGB_RCTL_UPE | IXGB_RCTL_MPE); |
| 1116 | } |
| 1117 | /* enable VLAN filtering */ |
| 1118 | rctl |= IXGB_RCTL_VFE; |
| 1119 | rctl &= ~IXGB_RCTL_CFIEN; |
| 1120 | } |
| 1121 | |
| 1122 | if (netdev_mc_count(netdev) > IXGB_MAX_NUM_MULTICAST_ADDRESSES) { |
| 1123 | rctl |= IXGB_RCTL_MPE; |
| 1124 | IXGB_WRITE_REG(hw, RCTL, rctl); |
| 1125 | } else { |
| 1126 | u8 *mta = kmalloc(IXGB_MAX_NUM_MULTICAST_ADDRESSES * |
| 1127 | ETH_ALEN, GFP_ATOMIC); |
| 1128 | u8 *addr; |
| 1129 | if (!mta) |
| 1130 | goto alloc_failed; |
| 1131 | |
| 1132 | IXGB_WRITE_REG(hw, RCTL, rctl); |
| 1133 | |
| 1134 | addr = mta; |
| 1135 | netdev_for_each_mc_addr(ha, netdev) { |
| 1136 | memcpy(addr, ha->addr, ETH_ALEN); |
| 1137 | addr += ETH_ALEN; |
| 1138 | } |
| 1139 | |
| 1140 | ixgb_mc_addr_list_update(hw, mta, netdev_mc_count(netdev), 0); |
| 1141 | kfree(mta); |
| 1142 | } |
| 1143 | |
| 1144 | alloc_failed: |
| 1145 | if (netdev->features & NETIF_F_HW_VLAN_CTAG_RX) |
| 1146 | ixgb_vlan_strip_enable(adapter); |
| 1147 | else |
| 1148 | ixgb_vlan_strip_disable(adapter); |
| 1149 | |
| 1150 | } |
| 1151 | |
| 1152 | /** |
| 1153 | * ixgb_watchdog - Timer Call-back |
| 1154 | * @data: pointer to netdev cast into an unsigned long |
| 1155 | **/ |
| 1156 | |
| 1157 | static void |
| 1158 | ixgb_watchdog(unsigned long data) |
| 1159 | { |
| 1160 | struct ixgb_adapter *adapter = (struct ixgb_adapter *)data; |
| 1161 | struct net_device *netdev = adapter->netdev; |
| 1162 | struct ixgb_desc_ring *txdr = &adapter->tx_ring; |
| 1163 | |
| 1164 | ixgb_check_for_link(&adapter->hw); |
| 1165 | |
| 1166 | if (ixgb_check_for_bad_link(&adapter->hw)) { |
| 1167 | /* force the reset path */ |
| 1168 | netif_stop_queue(netdev); |
| 1169 | } |
| 1170 | |
| 1171 | if (adapter->hw.link_up) { |
| 1172 | if (!netif_carrier_ok(netdev)) { |
| 1173 | netdev_info(netdev, |
| 1174 | "NIC Link is Up 10 Gbps Full Duplex, Flow Control: %s\n", |
| 1175 | (adapter->hw.fc.type == ixgb_fc_full) ? |
| 1176 | "RX/TX" : |
| 1177 | (adapter->hw.fc.type == ixgb_fc_rx_pause) ? |
| 1178 | "RX" : |
| 1179 | (adapter->hw.fc.type == ixgb_fc_tx_pause) ? |
| 1180 | "TX" : "None"); |
| 1181 | adapter->link_speed = 10000; |
| 1182 | adapter->link_duplex = FULL_DUPLEX; |
| 1183 | netif_carrier_on(netdev); |
| 1184 | } |
| 1185 | } else { |
| 1186 | if (netif_carrier_ok(netdev)) { |
| 1187 | adapter->link_speed = 0; |
| 1188 | adapter->link_duplex = 0; |
| 1189 | netdev_info(netdev, "NIC Link is Down\n"); |
| 1190 | netif_carrier_off(netdev); |
| 1191 | } |
| 1192 | } |
| 1193 | |
| 1194 | ixgb_update_stats(adapter); |
| 1195 | |
| 1196 | if (!netif_carrier_ok(netdev)) { |
| 1197 | if (IXGB_DESC_UNUSED(txdr) + 1 < txdr->count) { |
| 1198 | /* We've lost link, so the controller stops DMA, |
| 1199 | * but we've got queued Tx work that's never going |
| 1200 | * to get done, so reset controller to flush Tx. |
| 1201 | * (Do the reset outside of interrupt context). */ |
| 1202 | schedule_work(&adapter->tx_timeout_task); |
| 1203 | /* return immediately since reset is imminent */ |
| 1204 | return; |
| 1205 | } |
| 1206 | } |
| 1207 | |
| 1208 | /* Force detection of hung controller every watchdog period */ |
| 1209 | adapter->detect_tx_hung = true; |
| 1210 | |
| 1211 | /* generate an interrupt to force clean up of any stragglers */ |
| 1212 | IXGB_WRITE_REG(&adapter->hw, ICS, IXGB_INT_TXDW); |
| 1213 | |
| 1214 | /* Reset the timer */ |
| 1215 | mod_timer(&adapter->watchdog_timer, jiffies + 2 * HZ); |
| 1216 | } |
| 1217 | |
| 1218 | #define IXGB_TX_FLAGS_CSUM 0x00000001 |
| 1219 | #define IXGB_TX_FLAGS_VLAN 0x00000002 |
| 1220 | #define IXGB_TX_FLAGS_TSO 0x00000004 |
| 1221 | |
| 1222 | static int |
| 1223 | ixgb_tso(struct ixgb_adapter *adapter, struct sk_buff *skb) |
| 1224 | { |
| 1225 | struct ixgb_context_desc *context_desc; |
| 1226 | unsigned int i; |
| 1227 | u8 ipcss, ipcso, tucss, tucso, hdr_len; |
| 1228 | u16 ipcse, tucse, mss; |
| 1229 | int err; |
| 1230 | |
| 1231 | if (likely(skb_is_gso(skb))) { |
| 1232 | struct ixgb_buffer *buffer_info; |
| 1233 | struct iphdr *iph; |
| 1234 | |
| 1235 | if (skb_header_cloned(skb)) { |
| 1236 | err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC); |
| 1237 | if (err) |
| 1238 | return err; |
| 1239 | } |
| 1240 | |
| 1241 | hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb); |
| 1242 | mss = skb_shinfo(skb)->gso_size; |
| 1243 | iph = ip_hdr(skb); |
| 1244 | iph->tot_len = 0; |
| 1245 | iph->check = 0; |
| 1246 | tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr, |
| 1247 | iph->daddr, 0, |
| 1248 | IPPROTO_TCP, 0); |
| 1249 | ipcss = skb_network_offset(skb); |
| 1250 | ipcso = (void *)&(iph->check) - (void *)skb->data; |
| 1251 | ipcse = skb_transport_offset(skb) - 1; |
| 1252 | tucss = skb_transport_offset(skb); |
| 1253 | tucso = (void *)&(tcp_hdr(skb)->check) - (void *)skb->data; |
| 1254 | tucse = 0; |
| 1255 | |
| 1256 | i = adapter->tx_ring.next_to_use; |
| 1257 | context_desc = IXGB_CONTEXT_DESC(adapter->tx_ring, i); |
| 1258 | buffer_info = &adapter->tx_ring.buffer_info[i]; |
| 1259 | WARN_ON(buffer_info->dma != 0); |
| 1260 | |
| 1261 | context_desc->ipcss = ipcss; |
| 1262 | context_desc->ipcso = ipcso; |
| 1263 | context_desc->ipcse = cpu_to_le16(ipcse); |
| 1264 | context_desc->tucss = tucss; |
| 1265 | context_desc->tucso = tucso; |
| 1266 | context_desc->tucse = cpu_to_le16(tucse); |
| 1267 | context_desc->mss = cpu_to_le16(mss); |
| 1268 | context_desc->hdr_len = hdr_len; |
| 1269 | context_desc->status = 0; |
| 1270 | context_desc->cmd_type_len = cpu_to_le32( |
| 1271 | IXGB_CONTEXT_DESC_TYPE |
| 1272 | | IXGB_CONTEXT_DESC_CMD_TSE |
| 1273 | | IXGB_CONTEXT_DESC_CMD_IP |
| 1274 | | IXGB_CONTEXT_DESC_CMD_TCP |
| 1275 | | IXGB_CONTEXT_DESC_CMD_IDE |
| 1276 | | (skb->len - (hdr_len))); |
| 1277 | |
| 1278 | |
| 1279 | if (++i == adapter->tx_ring.count) i = 0; |
| 1280 | adapter->tx_ring.next_to_use = i; |
| 1281 | |
| 1282 | return 1; |
| 1283 | } |
| 1284 | |
| 1285 | return 0; |
| 1286 | } |
| 1287 | |
| 1288 | static bool |
| 1289 | ixgb_tx_csum(struct ixgb_adapter *adapter, struct sk_buff *skb) |
| 1290 | { |
| 1291 | struct ixgb_context_desc *context_desc; |
| 1292 | unsigned int i; |
| 1293 | u8 css, cso; |
| 1294 | |
| 1295 | if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) { |
| 1296 | struct ixgb_buffer *buffer_info; |
| 1297 | css = skb_checksum_start_offset(skb); |
| 1298 | cso = css + skb->csum_offset; |
| 1299 | |
| 1300 | i = adapter->tx_ring.next_to_use; |
| 1301 | context_desc = IXGB_CONTEXT_DESC(adapter->tx_ring, i); |
| 1302 | buffer_info = &adapter->tx_ring.buffer_info[i]; |
| 1303 | WARN_ON(buffer_info->dma != 0); |
| 1304 | |
| 1305 | context_desc->tucss = css; |
| 1306 | context_desc->tucso = cso; |
| 1307 | context_desc->tucse = 0; |
| 1308 | /* zero out any previously existing data in one instruction */ |
| 1309 | *(u32 *)&(context_desc->ipcss) = 0; |
| 1310 | context_desc->status = 0; |
| 1311 | context_desc->hdr_len = 0; |
| 1312 | context_desc->mss = 0; |
| 1313 | context_desc->cmd_type_len = |
| 1314 | cpu_to_le32(IXGB_CONTEXT_DESC_TYPE |
| 1315 | | IXGB_TX_DESC_CMD_IDE); |
| 1316 | |
| 1317 | if (++i == adapter->tx_ring.count) i = 0; |
| 1318 | adapter->tx_ring.next_to_use = i; |
| 1319 | |
| 1320 | return true; |
| 1321 | } |
| 1322 | |
| 1323 | return false; |
| 1324 | } |
| 1325 | |
| 1326 | #define IXGB_MAX_TXD_PWR 14 |
| 1327 | #define IXGB_MAX_DATA_PER_TXD (1<<IXGB_MAX_TXD_PWR) |
| 1328 | |
| 1329 | static int |
| 1330 | ixgb_tx_map(struct ixgb_adapter *adapter, struct sk_buff *skb, |
| 1331 | unsigned int first) |
| 1332 | { |
| 1333 | struct ixgb_desc_ring *tx_ring = &adapter->tx_ring; |
| 1334 | struct pci_dev *pdev = adapter->pdev; |
| 1335 | struct ixgb_buffer *buffer_info; |
| 1336 | int len = skb_headlen(skb); |
| 1337 | unsigned int offset = 0, size, count = 0, i; |
| 1338 | unsigned int mss = skb_shinfo(skb)->gso_size; |
| 1339 | unsigned int nr_frags = skb_shinfo(skb)->nr_frags; |
| 1340 | unsigned int f; |
| 1341 | |
| 1342 | i = tx_ring->next_to_use; |
| 1343 | |
| 1344 | while (len) { |
| 1345 | buffer_info = &tx_ring->buffer_info[i]; |
| 1346 | size = min(len, IXGB_MAX_DATA_PER_TXD); |
| 1347 | /* Workaround for premature desc write-backs |
| 1348 | * in TSO mode. Append 4-byte sentinel desc */ |
| 1349 | if (unlikely(mss && !nr_frags && size == len && size > 8)) |
| 1350 | size -= 4; |
| 1351 | |
| 1352 | buffer_info->length = size; |
| 1353 | WARN_ON(buffer_info->dma != 0); |
| 1354 | buffer_info->time_stamp = jiffies; |
| 1355 | buffer_info->mapped_as_page = false; |
| 1356 | buffer_info->dma = dma_map_single(&pdev->dev, |
| 1357 | skb->data + offset, |
| 1358 | size, DMA_TO_DEVICE); |
| 1359 | if (dma_mapping_error(&pdev->dev, buffer_info->dma)) |
| 1360 | goto dma_error; |
| 1361 | buffer_info->next_to_watch = 0; |
| 1362 | |
| 1363 | len -= size; |
| 1364 | offset += size; |
| 1365 | count++; |
| 1366 | if (len) { |
| 1367 | i++; |
| 1368 | if (i == tx_ring->count) |
| 1369 | i = 0; |
| 1370 | } |
| 1371 | } |
| 1372 | |
| 1373 | for (f = 0; f < nr_frags; f++) { |
| 1374 | const struct skb_frag_struct *frag; |
| 1375 | |
| 1376 | frag = &skb_shinfo(skb)->frags[f]; |
| 1377 | len = skb_frag_size(frag); |
| 1378 | offset = 0; |
| 1379 | |
| 1380 | while (len) { |
| 1381 | i++; |
| 1382 | if (i == tx_ring->count) |
| 1383 | i = 0; |
| 1384 | |
| 1385 | buffer_info = &tx_ring->buffer_info[i]; |
| 1386 | size = min(len, IXGB_MAX_DATA_PER_TXD); |
| 1387 | |
| 1388 | /* Workaround for premature desc write-backs |
| 1389 | * in TSO mode. Append 4-byte sentinel desc */ |
| 1390 | if (unlikely(mss && (f == (nr_frags - 1)) |
| 1391 | && size == len && size > 8)) |
| 1392 | size -= 4; |
| 1393 | |
| 1394 | buffer_info->length = size; |
| 1395 | buffer_info->time_stamp = jiffies; |
| 1396 | buffer_info->mapped_as_page = true; |
| 1397 | buffer_info->dma = |
| 1398 | skb_frag_dma_map(&pdev->dev, frag, offset, size, |
| 1399 | DMA_TO_DEVICE); |
| 1400 | if (dma_mapping_error(&pdev->dev, buffer_info->dma)) |
| 1401 | goto dma_error; |
| 1402 | buffer_info->next_to_watch = 0; |
| 1403 | |
| 1404 | len -= size; |
| 1405 | offset += size; |
| 1406 | count++; |
| 1407 | } |
| 1408 | } |
| 1409 | tx_ring->buffer_info[i].skb = skb; |
| 1410 | tx_ring->buffer_info[first].next_to_watch = i; |
| 1411 | |
| 1412 | return count; |
| 1413 | |
| 1414 | dma_error: |
| 1415 | dev_err(&pdev->dev, "TX DMA map failed\n"); |
| 1416 | buffer_info->dma = 0; |
| 1417 | if (count) |
| 1418 | count--; |
| 1419 | |
| 1420 | while (count--) { |
| 1421 | if (i==0) |
| 1422 | i += tx_ring->count; |
| 1423 | i--; |
| 1424 | buffer_info = &tx_ring->buffer_info[i]; |
| 1425 | ixgb_unmap_and_free_tx_resource(adapter, buffer_info); |
| 1426 | } |
| 1427 | |
| 1428 | return 0; |
| 1429 | } |
| 1430 | |
| 1431 | static void |
| 1432 | ixgb_tx_queue(struct ixgb_adapter *adapter, int count, int vlan_id,int tx_flags) |
| 1433 | { |
| 1434 | struct ixgb_desc_ring *tx_ring = &adapter->tx_ring; |
| 1435 | struct ixgb_tx_desc *tx_desc = NULL; |
| 1436 | struct ixgb_buffer *buffer_info; |
| 1437 | u32 cmd_type_len = adapter->tx_cmd_type; |
| 1438 | u8 status = 0; |
| 1439 | u8 popts = 0; |
| 1440 | unsigned int i; |
| 1441 | |
| 1442 | if (tx_flags & IXGB_TX_FLAGS_TSO) { |
| 1443 | cmd_type_len |= IXGB_TX_DESC_CMD_TSE; |
| 1444 | popts |= (IXGB_TX_DESC_POPTS_IXSM | IXGB_TX_DESC_POPTS_TXSM); |
| 1445 | } |
| 1446 | |
| 1447 | if (tx_flags & IXGB_TX_FLAGS_CSUM) |
| 1448 | popts |= IXGB_TX_DESC_POPTS_TXSM; |
| 1449 | |
| 1450 | if (tx_flags & IXGB_TX_FLAGS_VLAN) |
| 1451 | cmd_type_len |= IXGB_TX_DESC_CMD_VLE; |
| 1452 | |
| 1453 | i = tx_ring->next_to_use; |
| 1454 | |
| 1455 | while (count--) { |
| 1456 | buffer_info = &tx_ring->buffer_info[i]; |
| 1457 | tx_desc = IXGB_TX_DESC(*tx_ring, i); |
| 1458 | tx_desc->buff_addr = cpu_to_le64(buffer_info->dma); |
| 1459 | tx_desc->cmd_type_len = |
| 1460 | cpu_to_le32(cmd_type_len | buffer_info->length); |
| 1461 | tx_desc->status = status; |
| 1462 | tx_desc->popts = popts; |
| 1463 | tx_desc->vlan = cpu_to_le16(vlan_id); |
| 1464 | |
| 1465 | if (++i == tx_ring->count) i = 0; |
| 1466 | } |
| 1467 | |
| 1468 | tx_desc->cmd_type_len |= |
| 1469 | cpu_to_le32(IXGB_TX_DESC_CMD_EOP | IXGB_TX_DESC_CMD_RS); |
| 1470 | |
| 1471 | /* Force memory writes to complete before letting h/w |
| 1472 | * know there are new descriptors to fetch. (Only |
| 1473 | * applicable for weak-ordered memory model archs, |
| 1474 | * such as IA-64). */ |
| 1475 | wmb(); |
| 1476 | |
| 1477 | tx_ring->next_to_use = i; |
| 1478 | IXGB_WRITE_REG(&adapter->hw, TDT, i); |
| 1479 | } |
| 1480 | |
| 1481 | static int __ixgb_maybe_stop_tx(struct net_device *netdev, int size) |
| 1482 | { |
| 1483 | struct ixgb_adapter *adapter = netdev_priv(netdev); |
| 1484 | struct ixgb_desc_ring *tx_ring = &adapter->tx_ring; |
| 1485 | |
| 1486 | netif_stop_queue(netdev); |
| 1487 | /* Herbert's original patch had: |
| 1488 | * smp_mb__after_netif_stop_queue(); |
| 1489 | * but since that doesn't exist yet, just open code it. */ |
| 1490 | smp_mb(); |
| 1491 | |
| 1492 | /* We need to check again in a case another CPU has just |
| 1493 | * made room available. */ |
| 1494 | if (likely(IXGB_DESC_UNUSED(tx_ring) < size)) |
| 1495 | return -EBUSY; |
| 1496 | |
| 1497 | /* A reprieve! */ |
| 1498 | netif_start_queue(netdev); |
| 1499 | ++adapter->restart_queue; |
| 1500 | return 0; |
| 1501 | } |
| 1502 | |
| 1503 | static int ixgb_maybe_stop_tx(struct net_device *netdev, |
| 1504 | struct ixgb_desc_ring *tx_ring, int size) |
| 1505 | { |
| 1506 | if (likely(IXGB_DESC_UNUSED(tx_ring) >= size)) |
| 1507 | return 0; |
| 1508 | return __ixgb_maybe_stop_tx(netdev, size); |
| 1509 | } |
| 1510 | |
| 1511 | |
| 1512 | /* Tx Descriptors needed, worst case */ |
| 1513 | #define TXD_USE_COUNT(S) (((S) >> IXGB_MAX_TXD_PWR) + \ |
| 1514 | (((S) & (IXGB_MAX_DATA_PER_TXD - 1)) ? 1 : 0)) |
| 1515 | #define DESC_NEEDED TXD_USE_COUNT(IXGB_MAX_DATA_PER_TXD) /* skb->date */ + \ |
| 1516 | MAX_SKB_FRAGS * TXD_USE_COUNT(PAGE_SIZE) + 1 /* for context */ \ |
| 1517 | + 1 /* one more needed for sentinel TSO workaround */ |
| 1518 | |
| 1519 | static netdev_tx_t |
| 1520 | ixgb_xmit_frame(struct sk_buff *skb, struct net_device *netdev) |
| 1521 | { |
| 1522 | struct ixgb_adapter *adapter = netdev_priv(netdev); |
| 1523 | unsigned int first; |
| 1524 | unsigned int tx_flags = 0; |
| 1525 | int vlan_id = 0; |
| 1526 | int count = 0; |
| 1527 | int tso; |
| 1528 | |
| 1529 | if (test_bit(__IXGB_DOWN, &adapter->flags)) { |
| 1530 | dev_kfree_skb_any(skb); |
| 1531 | return NETDEV_TX_OK; |
| 1532 | } |
| 1533 | |
| 1534 | if (skb->len <= 0) { |
| 1535 | dev_kfree_skb_any(skb); |
| 1536 | return NETDEV_TX_OK; |
| 1537 | } |
| 1538 | |
| 1539 | if (unlikely(ixgb_maybe_stop_tx(netdev, &adapter->tx_ring, |
| 1540 | DESC_NEEDED))) |
| 1541 | return NETDEV_TX_BUSY; |
| 1542 | |
| 1543 | if (vlan_tx_tag_present(skb)) { |
| 1544 | tx_flags |= IXGB_TX_FLAGS_VLAN; |
| 1545 | vlan_id = vlan_tx_tag_get(skb); |
| 1546 | } |
| 1547 | |
| 1548 | first = adapter->tx_ring.next_to_use; |
| 1549 | |
| 1550 | tso = ixgb_tso(adapter, skb); |
| 1551 | if (tso < 0) { |
| 1552 | dev_kfree_skb_any(skb); |
| 1553 | return NETDEV_TX_OK; |
| 1554 | } |
| 1555 | |
| 1556 | if (likely(tso)) |
| 1557 | tx_flags |= IXGB_TX_FLAGS_TSO; |
| 1558 | else if (ixgb_tx_csum(adapter, skb)) |
| 1559 | tx_flags |= IXGB_TX_FLAGS_CSUM; |
| 1560 | |
| 1561 | count = ixgb_tx_map(adapter, skb, first); |
| 1562 | |
| 1563 | if (count) { |
| 1564 | ixgb_tx_queue(adapter, count, vlan_id, tx_flags); |
| 1565 | /* Make sure there is space in the ring for the next send. */ |
| 1566 | ixgb_maybe_stop_tx(netdev, &adapter->tx_ring, DESC_NEEDED); |
| 1567 | |
| 1568 | } else { |
| 1569 | dev_kfree_skb_any(skb); |
| 1570 | adapter->tx_ring.buffer_info[first].time_stamp = 0; |
| 1571 | adapter->tx_ring.next_to_use = first; |
| 1572 | } |
| 1573 | |
| 1574 | return NETDEV_TX_OK; |
| 1575 | } |
| 1576 | |
| 1577 | /** |
| 1578 | * ixgb_tx_timeout - Respond to a Tx Hang |
| 1579 | * @netdev: network interface device structure |
| 1580 | **/ |
| 1581 | |
| 1582 | static void |
| 1583 | ixgb_tx_timeout(struct net_device *netdev) |
| 1584 | { |
| 1585 | struct ixgb_adapter *adapter = netdev_priv(netdev); |
| 1586 | |
| 1587 | /* Do the reset outside of interrupt context */ |
| 1588 | schedule_work(&adapter->tx_timeout_task); |
| 1589 | } |
| 1590 | |
| 1591 | static void |
| 1592 | ixgb_tx_timeout_task(struct work_struct *work) |
| 1593 | { |
| 1594 | struct ixgb_adapter *adapter = |
| 1595 | container_of(work, struct ixgb_adapter, tx_timeout_task); |
| 1596 | |
| 1597 | adapter->tx_timeout_count++; |
| 1598 | ixgb_down(adapter, true); |
| 1599 | ixgb_up(adapter); |
| 1600 | } |
| 1601 | |
| 1602 | /** |
| 1603 | * ixgb_get_stats - Get System Network Statistics |
| 1604 | * @netdev: network interface device structure |
| 1605 | * |
| 1606 | * Returns the address of the device statistics structure. |
| 1607 | * The statistics are actually updated from the timer callback. |
| 1608 | **/ |
| 1609 | |
| 1610 | static struct net_device_stats * |
| 1611 | ixgb_get_stats(struct net_device *netdev) |
| 1612 | { |
| 1613 | return &netdev->stats; |
| 1614 | } |
| 1615 | |
| 1616 | /** |
| 1617 | * ixgb_change_mtu - Change the Maximum Transfer Unit |
| 1618 | * @netdev: network interface device structure |
| 1619 | * @new_mtu: new value for maximum frame size |
| 1620 | * |
| 1621 | * Returns 0 on success, negative on failure |
| 1622 | **/ |
| 1623 | |
| 1624 | static int |
| 1625 | ixgb_change_mtu(struct net_device *netdev, int new_mtu) |
| 1626 | { |
| 1627 | struct ixgb_adapter *adapter = netdev_priv(netdev); |
| 1628 | int max_frame = new_mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH; |
| 1629 | int old_max_frame = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH; |
| 1630 | |
| 1631 | /* MTU < 68 is an error for IPv4 traffic, just don't allow it */ |
| 1632 | if ((new_mtu < 68) || |
| 1633 | (max_frame > IXGB_MAX_JUMBO_FRAME_SIZE + ENET_FCS_LENGTH)) { |
| 1634 | netif_err(adapter, probe, adapter->netdev, |
| 1635 | "Invalid MTU setting %d\n", new_mtu); |
| 1636 | return -EINVAL; |
| 1637 | } |
| 1638 | |
| 1639 | if (old_max_frame == max_frame) |
| 1640 | return 0; |
| 1641 | |
| 1642 | if (netif_running(netdev)) |
| 1643 | ixgb_down(adapter, true); |
| 1644 | |
| 1645 | adapter->rx_buffer_len = max_frame + 8; /* + 8 for errata */ |
| 1646 | |
| 1647 | netdev->mtu = new_mtu; |
| 1648 | |
| 1649 | if (netif_running(netdev)) |
| 1650 | ixgb_up(adapter); |
| 1651 | |
| 1652 | return 0; |
| 1653 | } |
| 1654 | |
| 1655 | /** |
| 1656 | * ixgb_update_stats - Update the board statistics counters. |
| 1657 | * @adapter: board private structure |
| 1658 | **/ |
| 1659 | |
| 1660 | void |
| 1661 | ixgb_update_stats(struct ixgb_adapter *adapter) |
| 1662 | { |
| 1663 | struct net_device *netdev = adapter->netdev; |
| 1664 | struct pci_dev *pdev = adapter->pdev; |
| 1665 | |
| 1666 | /* Prevent stats update while adapter is being reset */ |
| 1667 | if (pci_channel_offline(pdev)) |
| 1668 | return; |
| 1669 | |
| 1670 | if ((netdev->flags & IFF_PROMISC) || (netdev->flags & IFF_ALLMULTI) || |
| 1671 | (netdev_mc_count(netdev) > IXGB_MAX_NUM_MULTICAST_ADDRESSES)) { |
| 1672 | u64 multi = IXGB_READ_REG(&adapter->hw, MPRCL); |
| 1673 | u32 bcast_l = IXGB_READ_REG(&adapter->hw, BPRCL); |
| 1674 | u32 bcast_h = IXGB_READ_REG(&adapter->hw, BPRCH); |
| 1675 | u64 bcast = ((u64)bcast_h << 32) | bcast_l; |
| 1676 | |
| 1677 | multi |= ((u64)IXGB_READ_REG(&adapter->hw, MPRCH) << 32); |
| 1678 | /* fix up multicast stats by removing broadcasts */ |
| 1679 | if (multi >= bcast) |
| 1680 | multi -= bcast; |
| 1681 | |
| 1682 | adapter->stats.mprcl += (multi & 0xFFFFFFFF); |
| 1683 | adapter->stats.mprch += (multi >> 32); |
| 1684 | adapter->stats.bprcl += bcast_l; |
| 1685 | adapter->stats.bprch += bcast_h; |
| 1686 | } else { |
| 1687 | adapter->stats.mprcl += IXGB_READ_REG(&adapter->hw, MPRCL); |
| 1688 | adapter->stats.mprch += IXGB_READ_REG(&adapter->hw, MPRCH); |
| 1689 | adapter->stats.bprcl += IXGB_READ_REG(&adapter->hw, BPRCL); |
| 1690 | adapter->stats.bprch += IXGB_READ_REG(&adapter->hw, BPRCH); |
| 1691 | } |
| 1692 | adapter->stats.tprl += IXGB_READ_REG(&adapter->hw, TPRL); |
| 1693 | adapter->stats.tprh += IXGB_READ_REG(&adapter->hw, TPRH); |
| 1694 | adapter->stats.gprcl += IXGB_READ_REG(&adapter->hw, GPRCL); |
| 1695 | adapter->stats.gprch += IXGB_READ_REG(&adapter->hw, GPRCH); |
| 1696 | adapter->stats.uprcl += IXGB_READ_REG(&adapter->hw, UPRCL); |
| 1697 | adapter->stats.uprch += IXGB_READ_REG(&adapter->hw, UPRCH); |
| 1698 | adapter->stats.vprcl += IXGB_READ_REG(&adapter->hw, VPRCL); |
| 1699 | adapter->stats.vprch += IXGB_READ_REG(&adapter->hw, VPRCH); |
| 1700 | adapter->stats.jprcl += IXGB_READ_REG(&adapter->hw, JPRCL); |
| 1701 | adapter->stats.jprch += IXGB_READ_REG(&adapter->hw, JPRCH); |
| 1702 | adapter->stats.gorcl += IXGB_READ_REG(&adapter->hw, GORCL); |
| 1703 | adapter->stats.gorch += IXGB_READ_REG(&adapter->hw, GORCH); |
| 1704 | adapter->stats.torl += IXGB_READ_REG(&adapter->hw, TORL); |
| 1705 | adapter->stats.torh += IXGB_READ_REG(&adapter->hw, TORH); |
| 1706 | adapter->stats.rnbc += IXGB_READ_REG(&adapter->hw, RNBC); |
| 1707 | adapter->stats.ruc += IXGB_READ_REG(&adapter->hw, RUC); |
| 1708 | adapter->stats.roc += IXGB_READ_REG(&adapter->hw, ROC); |
| 1709 | adapter->stats.rlec += IXGB_READ_REG(&adapter->hw, RLEC); |
| 1710 | adapter->stats.crcerrs += IXGB_READ_REG(&adapter->hw, CRCERRS); |
| 1711 | adapter->stats.icbc += IXGB_READ_REG(&adapter->hw, ICBC); |
| 1712 | adapter->stats.ecbc += IXGB_READ_REG(&adapter->hw, ECBC); |
| 1713 | adapter->stats.mpc += IXGB_READ_REG(&adapter->hw, MPC); |
| 1714 | adapter->stats.tptl += IXGB_READ_REG(&adapter->hw, TPTL); |
| 1715 | adapter->stats.tpth += IXGB_READ_REG(&adapter->hw, TPTH); |
| 1716 | adapter->stats.gptcl += IXGB_READ_REG(&adapter->hw, GPTCL); |
| 1717 | adapter->stats.gptch += IXGB_READ_REG(&adapter->hw, GPTCH); |
| 1718 | adapter->stats.bptcl += IXGB_READ_REG(&adapter->hw, BPTCL); |
| 1719 | adapter->stats.bptch += IXGB_READ_REG(&adapter->hw, BPTCH); |
| 1720 | adapter->stats.mptcl += IXGB_READ_REG(&adapter->hw, MPTCL); |
| 1721 | adapter->stats.mptch += IXGB_READ_REG(&adapter->hw, MPTCH); |
| 1722 | adapter->stats.uptcl += IXGB_READ_REG(&adapter->hw, UPTCL); |
| 1723 | adapter->stats.uptch += IXGB_READ_REG(&adapter->hw, UPTCH); |
| 1724 | adapter->stats.vptcl += IXGB_READ_REG(&adapter->hw, VPTCL); |
| 1725 | adapter->stats.vptch += IXGB_READ_REG(&adapter->hw, VPTCH); |
| 1726 | adapter->stats.jptcl += IXGB_READ_REG(&adapter->hw, JPTCL); |
| 1727 | adapter->stats.jptch += IXGB_READ_REG(&adapter->hw, JPTCH); |
| 1728 | adapter->stats.gotcl += IXGB_READ_REG(&adapter->hw, GOTCL); |
| 1729 | adapter->stats.gotch += IXGB_READ_REG(&adapter->hw, GOTCH); |
| 1730 | adapter->stats.totl += IXGB_READ_REG(&adapter->hw, TOTL); |
| 1731 | adapter->stats.toth += IXGB_READ_REG(&adapter->hw, TOTH); |
| 1732 | adapter->stats.dc += IXGB_READ_REG(&adapter->hw, DC); |
| 1733 | adapter->stats.plt64c += IXGB_READ_REG(&adapter->hw, PLT64C); |
| 1734 | adapter->stats.tsctc += IXGB_READ_REG(&adapter->hw, TSCTC); |
| 1735 | adapter->stats.tsctfc += IXGB_READ_REG(&adapter->hw, TSCTFC); |
| 1736 | adapter->stats.ibic += IXGB_READ_REG(&adapter->hw, IBIC); |
| 1737 | adapter->stats.rfc += IXGB_READ_REG(&adapter->hw, RFC); |
| 1738 | adapter->stats.lfc += IXGB_READ_REG(&adapter->hw, LFC); |
| 1739 | adapter->stats.pfrc += IXGB_READ_REG(&adapter->hw, PFRC); |
| 1740 | adapter->stats.pftc += IXGB_READ_REG(&adapter->hw, PFTC); |
| 1741 | adapter->stats.mcfrc += IXGB_READ_REG(&adapter->hw, MCFRC); |
| 1742 | adapter->stats.mcftc += IXGB_READ_REG(&adapter->hw, MCFTC); |
| 1743 | adapter->stats.xonrxc += IXGB_READ_REG(&adapter->hw, XONRXC); |
| 1744 | adapter->stats.xontxc += IXGB_READ_REG(&adapter->hw, XONTXC); |
| 1745 | adapter->stats.xoffrxc += IXGB_READ_REG(&adapter->hw, XOFFRXC); |
| 1746 | adapter->stats.xofftxc += IXGB_READ_REG(&adapter->hw, XOFFTXC); |
| 1747 | adapter->stats.rjc += IXGB_READ_REG(&adapter->hw, RJC); |
| 1748 | |
| 1749 | /* Fill out the OS statistics structure */ |
| 1750 | |
| 1751 | netdev->stats.rx_packets = adapter->stats.gprcl; |
| 1752 | netdev->stats.tx_packets = adapter->stats.gptcl; |
| 1753 | netdev->stats.rx_bytes = adapter->stats.gorcl; |
| 1754 | netdev->stats.tx_bytes = adapter->stats.gotcl; |
| 1755 | netdev->stats.multicast = adapter->stats.mprcl; |
| 1756 | netdev->stats.collisions = 0; |
| 1757 | |
| 1758 | /* ignore RLEC as it reports errors for padded (<64bytes) frames |
| 1759 | * with a length in the type/len field */ |
| 1760 | netdev->stats.rx_errors = |
| 1761 | /* adapter->stats.rnbc + */ adapter->stats.crcerrs + |
| 1762 | adapter->stats.ruc + |
| 1763 | adapter->stats.roc /*+ adapter->stats.rlec */ + |
| 1764 | adapter->stats.icbc + |
| 1765 | adapter->stats.ecbc + adapter->stats.mpc; |
| 1766 | |
| 1767 | /* see above |
| 1768 | * netdev->stats.rx_length_errors = adapter->stats.rlec; |
| 1769 | */ |
| 1770 | |
| 1771 | netdev->stats.rx_crc_errors = adapter->stats.crcerrs; |
| 1772 | netdev->stats.rx_fifo_errors = adapter->stats.mpc; |
| 1773 | netdev->stats.rx_missed_errors = adapter->stats.mpc; |
| 1774 | netdev->stats.rx_over_errors = adapter->stats.mpc; |
| 1775 | |
| 1776 | netdev->stats.tx_errors = 0; |
| 1777 | netdev->stats.rx_frame_errors = 0; |
| 1778 | netdev->stats.tx_aborted_errors = 0; |
| 1779 | netdev->stats.tx_carrier_errors = 0; |
| 1780 | netdev->stats.tx_fifo_errors = 0; |
| 1781 | netdev->stats.tx_heartbeat_errors = 0; |
| 1782 | netdev->stats.tx_window_errors = 0; |
| 1783 | } |
| 1784 | |
| 1785 | #define IXGB_MAX_INTR 10 |
| 1786 | /** |
| 1787 | * ixgb_intr - Interrupt Handler |
| 1788 | * @irq: interrupt number |
| 1789 | * @data: pointer to a network interface device structure |
| 1790 | **/ |
| 1791 | |
| 1792 | static irqreturn_t |
| 1793 | ixgb_intr(int irq, void *data) |
| 1794 | { |
| 1795 | struct net_device *netdev = data; |
| 1796 | struct ixgb_adapter *adapter = netdev_priv(netdev); |
| 1797 | struct ixgb_hw *hw = &adapter->hw; |
| 1798 | u32 icr = IXGB_READ_REG(hw, ICR); |
| 1799 | |
| 1800 | if (unlikely(!icr)) |
| 1801 | return IRQ_NONE; /* Not our interrupt */ |
| 1802 | |
| 1803 | if (unlikely(icr & (IXGB_INT_RXSEQ | IXGB_INT_LSC))) |
| 1804 | if (!test_bit(__IXGB_DOWN, &adapter->flags)) |
| 1805 | mod_timer(&adapter->watchdog_timer, jiffies); |
| 1806 | |
| 1807 | if (napi_schedule_prep(&adapter->napi)) { |
| 1808 | |
| 1809 | /* Disable interrupts and register for poll. The flush |
| 1810 | of the posted write is intentionally left out. |
| 1811 | */ |
| 1812 | |
| 1813 | IXGB_WRITE_REG(&adapter->hw, IMC, ~0); |
| 1814 | __napi_schedule(&adapter->napi); |
| 1815 | } |
| 1816 | return IRQ_HANDLED; |
| 1817 | } |
| 1818 | |
| 1819 | /** |
| 1820 | * ixgb_clean - NAPI Rx polling callback |
| 1821 | * @adapter: board private structure |
| 1822 | **/ |
| 1823 | |
| 1824 | static int |
| 1825 | ixgb_clean(struct napi_struct *napi, int budget) |
| 1826 | { |
| 1827 | struct ixgb_adapter *adapter = container_of(napi, struct ixgb_adapter, napi); |
| 1828 | int work_done = 0; |
| 1829 | |
| 1830 | ixgb_clean_tx_irq(adapter); |
| 1831 | ixgb_clean_rx_irq(adapter, &work_done, budget); |
| 1832 | |
| 1833 | /* If budget not fully consumed, exit the polling mode */ |
| 1834 | if (work_done < budget) { |
| 1835 | napi_complete(napi); |
| 1836 | if (!test_bit(__IXGB_DOWN, &adapter->flags)) |
| 1837 | ixgb_irq_enable(adapter); |
| 1838 | } |
| 1839 | |
| 1840 | return work_done; |
| 1841 | } |
| 1842 | |
| 1843 | /** |
| 1844 | * ixgb_clean_tx_irq - Reclaim resources after transmit completes |
| 1845 | * @adapter: board private structure |
| 1846 | **/ |
| 1847 | |
| 1848 | static bool |
| 1849 | ixgb_clean_tx_irq(struct ixgb_adapter *adapter) |
| 1850 | { |
| 1851 | struct ixgb_desc_ring *tx_ring = &adapter->tx_ring; |
| 1852 | struct net_device *netdev = adapter->netdev; |
| 1853 | struct ixgb_tx_desc *tx_desc, *eop_desc; |
| 1854 | struct ixgb_buffer *buffer_info; |
| 1855 | unsigned int i, eop; |
| 1856 | bool cleaned = false; |
| 1857 | |
| 1858 | i = tx_ring->next_to_clean; |
| 1859 | eop = tx_ring->buffer_info[i].next_to_watch; |
| 1860 | eop_desc = IXGB_TX_DESC(*tx_ring, eop); |
| 1861 | |
| 1862 | while (eop_desc->status & IXGB_TX_DESC_STATUS_DD) { |
| 1863 | |
| 1864 | rmb(); /* read buffer_info after eop_desc */ |
| 1865 | for (cleaned = false; !cleaned; ) { |
| 1866 | tx_desc = IXGB_TX_DESC(*tx_ring, i); |
| 1867 | buffer_info = &tx_ring->buffer_info[i]; |
| 1868 | |
| 1869 | if (tx_desc->popts & |
| 1870 | (IXGB_TX_DESC_POPTS_TXSM | |
| 1871 | IXGB_TX_DESC_POPTS_IXSM)) |
| 1872 | adapter->hw_csum_tx_good++; |
| 1873 | |
| 1874 | ixgb_unmap_and_free_tx_resource(adapter, buffer_info); |
| 1875 | |
| 1876 | *(u32 *)&(tx_desc->status) = 0; |
| 1877 | |
| 1878 | cleaned = (i == eop); |
| 1879 | if (++i == tx_ring->count) i = 0; |
| 1880 | } |
| 1881 | |
| 1882 | eop = tx_ring->buffer_info[i].next_to_watch; |
| 1883 | eop_desc = IXGB_TX_DESC(*tx_ring, eop); |
| 1884 | } |
| 1885 | |
| 1886 | tx_ring->next_to_clean = i; |
| 1887 | |
| 1888 | if (unlikely(cleaned && netif_carrier_ok(netdev) && |
| 1889 | IXGB_DESC_UNUSED(tx_ring) >= DESC_NEEDED)) { |
| 1890 | /* Make sure that anybody stopping the queue after this |
| 1891 | * sees the new next_to_clean. */ |
| 1892 | smp_mb(); |
| 1893 | |
| 1894 | if (netif_queue_stopped(netdev) && |
| 1895 | !(test_bit(__IXGB_DOWN, &adapter->flags))) { |
| 1896 | netif_wake_queue(netdev); |
| 1897 | ++adapter->restart_queue; |
| 1898 | } |
| 1899 | } |
| 1900 | |
| 1901 | if (adapter->detect_tx_hung) { |
| 1902 | /* detect a transmit hang in hardware, this serializes the |
| 1903 | * check with the clearing of time_stamp and movement of i */ |
| 1904 | adapter->detect_tx_hung = false; |
| 1905 | if (tx_ring->buffer_info[eop].time_stamp && |
| 1906 | time_after(jiffies, tx_ring->buffer_info[eop].time_stamp + HZ) |
| 1907 | && !(IXGB_READ_REG(&adapter->hw, STATUS) & |
| 1908 | IXGB_STATUS_TXOFF)) { |
| 1909 | /* detected Tx unit hang */ |
| 1910 | netif_err(adapter, drv, adapter->netdev, |
| 1911 | "Detected Tx Unit Hang\n" |
| 1912 | " TDH <%x>\n" |
| 1913 | " TDT <%x>\n" |
| 1914 | " next_to_use <%x>\n" |
| 1915 | " next_to_clean <%x>\n" |
| 1916 | "buffer_info[next_to_clean]\n" |
| 1917 | " time_stamp <%lx>\n" |
| 1918 | " next_to_watch <%x>\n" |
| 1919 | " jiffies <%lx>\n" |
| 1920 | " next_to_watch.status <%x>\n", |
| 1921 | IXGB_READ_REG(&adapter->hw, TDH), |
| 1922 | IXGB_READ_REG(&adapter->hw, TDT), |
| 1923 | tx_ring->next_to_use, |
| 1924 | tx_ring->next_to_clean, |
| 1925 | tx_ring->buffer_info[eop].time_stamp, |
| 1926 | eop, |
| 1927 | jiffies, |
| 1928 | eop_desc->status); |
| 1929 | netif_stop_queue(netdev); |
| 1930 | } |
| 1931 | } |
| 1932 | |
| 1933 | return cleaned; |
| 1934 | } |
| 1935 | |
| 1936 | /** |
| 1937 | * ixgb_rx_checksum - Receive Checksum Offload for 82597. |
| 1938 | * @adapter: board private structure |
| 1939 | * @rx_desc: receive descriptor |
| 1940 | * @sk_buff: socket buffer with received data |
| 1941 | **/ |
| 1942 | |
| 1943 | static void |
| 1944 | ixgb_rx_checksum(struct ixgb_adapter *adapter, |
| 1945 | struct ixgb_rx_desc *rx_desc, |
| 1946 | struct sk_buff *skb) |
| 1947 | { |
| 1948 | /* Ignore Checksum bit is set OR |
| 1949 | * TCP Checksum has not been calculated |
| 1950 | */ |
| 1951 | if ((rx_desc->status & IXGB_RX_DESC_STATUS_IXSM) || |
| 1952 | (!(rx_desc->status & IXGB_RX_DESC_STATUS_TCPCS))) { |
| 1953 | skb_checksum_none_assert(skb); |
| 1954 | return; |
| 1955 | } |
| 1956 | |
| 1957 | /* At this point we know the hardware did the TCP checksum */ |
| 1958 | /* now look at the TCP checksum error bit */ |
| 1959 | if (rx_desc->errors & IXGB_RX_DESC_ERRORS_TCPE) { |
| 1960 | /* let the stack verify checksum errors */ |
| 1961 | skb_checksum_none_assert(skb); |
| 1962 | adapter->hw_csum_rx_error++; |
| 1963 | } else { |
| 1964 | /* TCP checksum is good */ |
| 1965 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
| 1966 | adapter->hw_csum_rx_good++; |
| 1967 | } |
| 1968 | } |
| 1969 | |
| 1970 | /* |
| 1971 | * this should improve performance for small packets with large amounts |
| 1972 | * of reassembly being done in the stack |
| 1973 | */ |
| 1974 | static void ixgb_check_copybreak(struct net_device *netdev, |
| 1975 | struct ixgb_buffer *buffer_info, |
| 1976 | u32 length, struct sk_buff **skb) |
| 1977 | { |
| 1978 | struct sk_buff *new_skb; |
| 1979 | |
| 1980 | if (length > copybreak) |
| 1981 | return; |
| 1982 | |
| 1983 | new_skb = netdev_alloc_skb_ip_align(netdev, length); |
| 1984 | if (!new_skb) |
| 1985 | return; |
| 1986 | |
| 1987 | skb_copy_to_linear_data_offset(new_skb, -NET_IP_ALIGN, |
| 1988 | (*skb)->data - NET_IP_ALIGN, |
| 1989 | length + NET_IP_ALIGN); |
| 1990 | /* save the skb in buffer_info as good */ |
| 1991 | buffer_info->skb = *skb; |
| 1992 | *skb = new_skb; |
| 1993 | } |
| 1994 | |
| 1995 | /** |
| 1996 | * ixgb_clean_rx_irq - Send received data up the network stack, |
| 1997 | * @adapter: board private structure |
| 1998 | **/ |
| 1999 | |
| 2000 | static bool |
| 2001 | ixgb_clean_rx_irq(struct ixgb_adapter *adapter, int *work_done, int work_to_do) |
| 2002 | { |
| 2003 | struct ixgb_desc_ring *rx_ring = &adapter->rx_ring; |
| 2004 | struct net_device *netdev = adapter->netdev; |
| 2005 | struct pci_dev *pdev = adapter->pdev; |
| 2006 | struct ixgb_rx_desc *rx_desc, *next_rxd; |
| 2007 | struct ixgb_buffer *buffer_info, *next_buffer, *next2_buffer; |
| 2008 | u32 length; |
| 2009 | unsigned int i, j; |
| 2010 | int cleaned_count = 0; |
| 2011 | bool cleaned = false; |
| 2012 | |
| 2013 | i = rx_ring->next_to_clean; |
| 2014 | rx_desc = IXGB_RX_DESC(*rx_ring, i); |
| 2015 | buffer_info = &rx_ring->buffer_info[i]; |
| 2016 | |
| 2017 | while (rx_desc->status & IXGB_RX_DESC_STATUS_DD) { |
| 2018 | struct sk_buff *skb; |
| 2019 | u8 status; |
| 2020 | |
| 2021 | if (*work_done >= work_to_do) |
| 2022 | break; |
| 2023 | |
| 2024 | (*work_done)++; |
| 2025 | rmb(); /* read descriptor and rx_buffer_info after status DD */ |
| 2026 | status = rx_desc->status; |
| 2027 | skb = buffer_info->skb; |
| 2028 | buffer_info->skb = NULL; |
| 2029 | |
| 2030 | prefetch(skb->data - NET_IP_ALIGN); |
| 2031 | |
| 2032 | if (++i == rx_ring->count) |
| 2033 | i = 0; |
| 2034 | next_rxd = IXGB_RX_DESC(*rx_ring, i); |
| 2035 | prefetch(next_rxd); |
| 2036 | |
| 2037 | j = i + 1; |
| 2038 | if (j == rx_ring->count) |
| 2039 | j = 0; |
| 2040 | next2_buffer = &rx_ring->buffer_info[j]; |
| 2041 | prefetch(next2_buffer); |
| 2042 | |
| 2043 | next_buffer = &rx_ring->buffer_info[i]; |
| 2044 | |
| 2045 | cleaned = true; |
| 2046 | cleaned_count++; |
| 2047 | |
| 2048 | dma_unmap_single(&pdev->dev, |
| 2049 | buffer_info->dma, |
| 2050 | buffer_info->length, |
| 2051 | DMA_FROM_DEVICE); |
| 2052 | buffer_info->dma = 0; |
| 2053 | |
| 2054 | length = le16_to_cpu(rx_desc->length); |
| 2055 | rx_desc->length = 0; |
| 2056 | |
| 2057 | if (unlikely(!(status & IXGB_RX_DESC_STATUS_EOP))) { |
| 2058 | |
| 2059 | /* All receives must fit into a single buffer */ |
| 2060 | |
| 2061 | pr_debug("Receive packet consumed multiple buffers length<%x>\n", |
| 2062 | length); |
| 2063 | |
| 2064 | dev_kfree_skb_irq(skb); |
| 2065 | goto rxdesc_done; |
| 2066 | } |
| 2067 | |
| 2068 | if (unlikely(rx_desc->errors & |
| 2069 | (IXGB_RX_DESC_ERRORS_CE | IXGB_RX_DESC_ERRORS_SE | |
| 2070 | IXGB_RX_DESC_ERRORS_P | IXGB_RX_DESC_ERRORS_RXE))) { |
| 2071 | dev_kfree_skb_irq(skb); |
| 2072 | goto rxdesc_done; |
| 2073 | } |
| 2074 | |
| 2075 | ixgb_check_copybreak(netdev, buffer_info, length, &skb); |
| 2076 | |
| 2077 | /* Good Receive */ |
| 2078 | skb_put(skb, length); |
| 2079 | |
| 2080 | /* Receive Checksum Offload */ |
| 2081 | ixgb_rx_checksum(adapter, rx_desc, skb); |
| 2082 | |
| 2083 | skb->protocol = eth_type_trans(skb, netdev); |
| 2084 | if (status & IXGB_RX_DESC_STATUS_VP) |
| 2085 | __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), |
| 2086 | le16_to_cpu(rx_desc->special)); |
| 2087 | |
| 2088 | netif_receive_skb(skb); |
| 2089 | |
| 2090 | rxdesc_done: |
| 2091 | /* clean up descriptor, might be written over by hw */ |
| 2092 | rx_desc->status = 0; |
| 2093 | |
| 2094 | /* return some buffers to hardware, one at a time is too slow */ |
| 2095 | if (unlikely(cleaned_count >= IXGB_RX_BUFFER_WRITE)) { |
| 2096 | ixgb_alloc_rx_buffers(adapter, cleaned_count); |
| 2097 | cleaned_count = 0; |
| 2098 | } |
| 2099 | |
| 2100 | /* use prefetched values */ |
| 2101 | rx_desc = next_rxd; |
| 2102 | buffer_info = next_buffer; |
| 2103 | } |
| 2104 | |
| 2105 | rx_ring->next_to_clean = i; |
| 2106 | |
| 2107 | cleaned_count = IXGB_DESC_UNUSED(rx_ring); |
| 2108 | if (cleaned_count) |
| 2109 | ixgb_alloc_rx_buffers(adapter, cleaned_count); |
| 2110 | |
| 2111 | return cleaned; |
| 2112 | } |
| 2113 | |
| 2114 | /** |
| 2115 | * ixgb_alloc_rx_buffers - Replace used receive buffers |
| 2116 | * @adapter: address of board private structure |
| 2117 | **/ |
| 2118 | |
| 2119 | static void |
| 2120 | ixgb_alloc_rx_buffers(struct ixgb_adapter *adapter, int cleaned_count) |
| 2121 | { |
| 2122 | struct ixgb_desc_ring *rx_ring = &adapter->rx_ring; |
| 2123 | struct net_device *netdev = adapter->netdev; |
| 2124 | struct pci_dev *pdev = adapter->pdev; |
| 2125 | struct ixgb_rx_desc *rx_desc; |
| 2126 | struct ixgb_buffer *buffer_info; |
| 2127 | struct sk_buff *skb; |
| 2128 | unsigned int i; |
| 2129 | long cleancount; |
| 2130 | |
| 2131 | i = rx_ring->next_to_use; |
| 2132 | buffer_info = &rx_ring->buffer_info[i]; |
| 2133 | cleancount = IXGB_DESC_UNUSED(rx_ring); |
| 2134 | |
| 2135 | |
| 2136 | /* leave three descriptors unused */ |
| 2137 | while (--cleancount > 2 && cleaned_count--) { |
| 2138 | /* recycle! its good for you */ |
| 2139 | skb = buffer_info->skb; |
| 2140 | if (skb) { |
| 2141 | skb_trim(skb, 0); |
| 2142 | goto map_skb; |
| 2143 | } |
| 2144 | |
| 2145 | skb = netdev_alloc_skb_ip_align(netdev, adapter->rx_buffer_len); |
| 2146 | if (unlikely(!skb)) { |
| 2147 | /* Better luck next round */ |
| 2148 | adapter->alloc_rx_buff_failed++; |
| 2149 | break; |
| 2150 | } |
| 2151 | |
| 2152 | buffer_info->skb = skb; |
| 2153 | buffer_info->length = adapter->rx_buffer_len; |
| 2154 | map_skb: |
| 2155 | buffer_info->dma = dma_map_single(&pdev->dev, |
| 2156 | skb->data, |
| 2157 | adapter->rx_buffer_len, |
| 2158 | DMA_FROM_DEVICE); |
| 2159 | if (dma_mapping_error(&pdev->dev, buffer_info->dma)) { |
| 2160 | adapter->alloc_rx_buff_failed++; |
| 2161 | break; |
| 2162 | } |
| 2163 | |
| 2164 | rx_desc = IXGB_RX_DESC(*rx_ring, i); |
| 2165 | rx_desc->buff_addr = cpu_to_le64(buffer_info->dma); |
| 2166 | /* guarantee DD bit not set now before h/w gets descriptor |
| 2167 | * this is the rest of the workaround for h/w double |
| 2168 | * writeback. */ |
| 2169 | rx_desc->status = 0; |
| 2170 | |
| 2171 | |
| 2172 | if (++i == rx_ring->count) |
| 2173 | i = 0; |
| 2174 | buffer_info = &rx_ring->buffer_info[i]; |
| 2175 | } |
| 2176 | |
| 2177 | if (likely(rx_ring->next_to_use != i)) { |
| 2178 | rx_ring->next_to_use = i; |
| 2179 | if (unlikely(i-- == 0)) |
| 2180 | i = (rx_ring->count - 1); |
| 2181 | |
| 2182 | /* Force memory writes to complete before letting h/w |
| 2183 | * know there are new descriptors to fetch. (Only |
| 2184 | * applicable for weak-ordered memory model archs, such |
| 2185 | * as IA-64). */ |
| 2186 | wmb(); |
| 2187 | IXGB_WRITE_REG(&adapter->hw, RDT, i); |
| 2188 | } |
| 2189 | } |
| 2190 | |
| 2191 | static void |
| 2192 | ixgb_vlan_strip_enable(struct ixgb_adapter *adapter) |
| 2193 | { |
| 2194 | u32 ctrl; |
| 2195 | |
| 2196 | /* enable VLAN tag insert/strip */ |
| 2197 | ctrl = IXGB_READ_REG(&adapter->hw, CTRL0); |
| 2198 | ctrl |= IXGB_CTRL0_VME; |
| 2199 | IXGB_WRITE_REG(&adapter->hw, CTRL0, ctrl); |
| 2200 | } |
| 2201 | |
| 2202 | static void |
| 2203 | ixgb_vlan_strip_disable(struct ixgb_adapter *adapter) |
| 2204 | { |
| 2205 | u32 ctrl; |
| 2206 | |
| 2207 | /* disable VLAN tag insert/strip */ |
| 2208 | ctrl = IXGB_READ_REG(&adapter->hw, CTRL0); |
| 2209 | ctrl &= ~IXGB_CTRL0_VME; |
| 2210 | IXGB_WRITE_REG(&adapter->hw, CTRL0, ctrl); |
| 2211 | } |
| 2212 | |
| 2213 | static int |
| 2214 | ixgb_vlan_rx_add_vid(struct net_device *netdev, __be16 proto, u16 vid) |
| 2215 | { |
| 2216 | struct ixgb_adapter *adapter = netdev_priv(netdev); |
| 2217 | u32 vfta, index; |
| 2218 | |
| 2219 | /* add VID to filter table */ |
| 2220 | |
| 2221 | index = (vid >> 5) & 0x7F; |
| 2222 | vfta = IXGB_READ_REG_ARRAY(&adapter->hw, VFTA, index); |
| 2223 | vfta |= (1 << (vid & 0x1F)); |
| 2224 | ixgb_write_vfta(&adapter->hw, index, vfta); |
| 2225 | set_bit(vid, adapter->active_vlans); |
| 2226 | |
| 2227 | return 0; |
| 2228 | } |
| 2229 | |
| 2230 | static int |
| 2231 | ixgb_vlan_rx_kill_vid(struct net_device *netdev, __be16 proto, u16 vid) |
| 2232 | { |
| 2233 | struct ixgb_adapter *adapter = netdev_priv(netdev); |
| 2234 | u32 vfta, index; |
| 2235 | |
| 2236 | /* remove VID from filter table */ |
| 2237 | |
| 2238 | index = (vid >> 5) & 0x7F; |
| 2239 | vfta = IXGB_READ_REG_ARRAY(&adapter->hw, VFTA, index); |
| 2240 | vfta &= ~(1 << (vid & 0x1F)); |
| 2241 | ixgb_write_vfta(&adapter->hw, index, vfta); |
| 2242 | clear_bit(vid, adapter->active_vlans); |
| 2243 | |
| 2244 | return 0; |
| 2245 | } |
| 2246 | |
| 2247 | static void |
| 2248 | ixgb_restore_vlan(struct ixgb_adapter *adapter) |
| 2249 | { |
| 2250 | u16 vid; |
| 2251 | |
| 2252 | for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID) |
| 2253 | ixgb_vlan_rx_add_vid(adapter->netdev, htons(ETH_P_8021Q), vid); |
| 2254 | } |
| 2255 | |
| 2256 | #ifdef CONFIG_NET_POLL_CONTROLLER |
| 2257 | /* |
| 2258 | * Polling 'interrupt' - used by things like netconsole to send skbs |
| 2259 | * without having to re-enable interrupts. It's not called while |
| 2260 | * the interrupt routine is executing. |
| 2261 | */ |
| 2262 | |
| 2263 | static void ixgb_netpoll(struct net_device *dev) |
| 2264 | { |
| 2265 | struct ixgb_adapter *adapter = netdev_priv(dev); |
| 2266 | |
| 2267 | disable_irq(adapter->pdev->irq); |
| 2268 | ixgb_intr(adapter->pdev->irq, dev); |
| 2269 | enable_irq(adapter->pdev->irq); |
| 2270 | } |
| 2271 | #endif |
| 2272 | |
| 2273 | /** |
| 2274 | * ixgb_io_error_detected - called when PCI error is detected |
| 2275 | * @pdev: pointer to pci device with error |
| 2276 | * @state: pci channel state after error |
| 2277 | * |
| 2278 | * This callback is called by the PCI subsystem whenever |
| 2279 | * a PCI bus error is detected. |
| 2280 | */ |
| 2281 | static pci_ers_result_t ixgb_io_error_detected(struct pci_dev *pdev, |
| 2282 | enum pci_channel_state state) |
| 2283 | { |
| 2284 | struct net_device *netdev = pci_get_drvdata(pdev); |
| 2285 | struct ixgb_adapter *adapter = netdev_priv(netdev); |
| 2286 | |
| 2287 | netif_device_detach(netdev); |
| 2288 | |
| 2289 | if (state == pci_channel_io_perm_failure) |
| 2290 | return PCI_ERS_RESULT_DISCONNECT; |
| 2291 | |
| 2292 | if (netif_running(netdev)) |
| 2293 | ixgb_down(adapter, true); |
| 2294 | |
| 2295 | pci_disable_device(pdev); |
| 2296 | |
| 2297 | /* Request a slot reset. */ |
| 2298 | return PCI_ERS_RESULT_NEED_RESET; |
| 2299 | } |
| 2300 | |
| 2301 | /** |
| 2302 | * ixgb_io_slot_reset - called after the pci bus has been reset. |
| 2303 | * @pdev pointer to pci device with error |
| 2304 | * |
| 2305 | * This callback is called after the PCI bus has been reset. |
| 2306 | * Basically, this tries to restart the card from scratch. |
| 2307 | * This is a shortened version of the device probe/discovery code, |
| 2308 | * it resembles the first-half of the ixgb_probe() routine. |
| 2309 | */ |
| 2310 | static pci_ers_result_t ixgb_io_slot_reset(struct pci_dev *pdev) |
| 2311 | { |
| 2312 | struct net_device *netdev = pci_get_drvdata(pdev); |
| 2313 | struct ixgb_adapter *adapter = netdev_priv(netdev); |
| 2314 | |
| 2315 | if (pci_enable_device(pdev)) { |
| 2316 | netif_err(adapter, probe, adapter->netdev, |
| 2317 | "Cannot re-enable PCI device after reset\n"); |
| 2318 | return PCI_ERS_RESULT_DISCONNECT; |
| 2319 | } |
| 2320 | |
| 2321 | /* Perform card reset only on one instance of the card */ |
| 2322 | if (0 != PCI_FUNC (pdev->devfn)) |
| 2323 | return PCI_ERS_RESULT_RECOVERED; |
| 2324 | |
| 2325 | pci_set_master(pdev); |
| 2326 | |
| 2327 | netif_carrier_off(netdev); |
| 2328 | netif_stop_queue(netdev); |
| 2329 | ixgb_reset(adapter); |
| 2330 | |
| 2331 | /* Make sure the EEPROM is good */ |
| 2332 | if (!ixgb_validate_eeprom_checksum(&adapter->hw)) { |
| 2333 | netif_err(adapter, probe, adapter->netdev, |
| 2334 | "After reset, the EEPROM checksum is not valid\n"); |
| 2335 | return PCI_ERS_RESULT_DISCONNECT; |
| 2336 | } |
| 2337 | ixgb_get_ee_mac_addr(&adapter->hw, netdev->dev_addr); |
| 2338 | memcpy(netdev->perm_addr, netdev->dev_addr, netdev->addr_len); |
| 2339 | |
| 2340 | if (!is_valid_ether_addr(netdev->perm_addr)) { |
| 2341 | netif_err(adapter, probe, adapter->netdev, |
| 2342 | "After reset, invalid MAC address\n"); |
| 2343 | return PCI_ERS_RESULT_DISCONNECT; |
| 2344 | } |
| 2345 | |
| 2346 | return PCI_ERS_RESULT_RECOVERED; |
| 2347 | } |
| 2348 | |
| 2349 | /** |
| 2350 | * ixgb_io_resume - called when its OK to resume normal operations |
| 2351 | * @pdev pointer to pci device with error |
| 2352 | * |
| 2353 | * The error recovery driver tells us that its OK to resume |
| 2354 | * normal operation. Implementation resembles the second-half |
| 2355 | * of the ixgb_probe() routine. |
| 2356 | */ |
| 2357 | static void ixgb_io_resume(struct pci_dev *pdev) |
| 2358 | { |
| 2359 | struct net_device *netdev = pci_get_drvdata(pdev); |
| 2360 | struct ixgb_adapter *adapter = netdev_priv(netdev); |
| 2361 | |
| 2362 | pci_set_master(pdev); |
| 2363 | |
| 2364 | if (netif_running(netdev)) { |
| 2365 | if (ixgb_up(adapter)) { |
| 2366 | pr_err("can't bring device back up after reset\n"); |
| 2367 | return; |
| 2368 | } |
| 2369 | } |
| 2370 | |
| 2371 | netif_device_attach(netdev); |
| 2372 | mod_timer(&adapter->watchdog_timer, jiffies); |
| 2373 | } |
| 2374 | |
| 2375 | /* ixgb_main.c */ |