drivers/net/ethernet/intel/fm10k/fm10k

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This source file includes following definitions.
fm10k_setup_tx_resources
fm10k_setup_all_tx_resources
fm10k_setup_rx_resources
fm10k_setup_all_rx_resources
fm10k_unmap_and_free_tx_resource
fm10k_clean_tx_ring
fm10k_free_tx_resources
fm10k_clean_all_tx_rings
fm10k_free_all_tx_resources
fm10k_clean_rx_ring
fm10k_free_rx_resources
fm10k_clean_all_rx_rings
fm10k_free_all_rx_resources
fm10k_request_glort_range
fm10k_free_udp_port_info
fm10k_restore_udp_port_info
fm10k_remove_tunnel_port
fm10k_insert_tunnel_port
fm10k_udp_tunnel_add
fm10k_udp_tunnel_del
fm10k_open
fm10k_close
fm10k_xmit_frame
fm10k_tx_timeout
fm10k_host_mbx_ready
fm10k_queue_vlan_request
fm10k_queue_mac_request
fm10k_clear_macvlan_queue
fm10k_uc_vlan_unsync
fm10k_mc_vlan_unsync
fm10k_update_vid
fm10k_vlan_rx_add_vid
fm10k_vlan_rx_kill_vid
fm10k_find_next_vlan
fm10k_clear_unused_vlans
__fm10k_uc_sync
fm10k_uc_sync
fm10k_uc_unsync
fm10k_set_mac
__fm10k_mc_sync
fm10k_mc_sync
fm10k_mc_unsync
fm10k_set_rx_mode
fm10k_restore_rx_state
fm10k_reset_rx_state
fm10k_get_stats64
fm10k_setup_tc
__fm10k_setup_tc
fm10k_assign_l2_accel
fm10k_dfwd_add_station
fm10k_dfwd_del_station
fm10k_features_check
fm10k_alloc_netdev
   1 // SPDX-License-Identifier: GPL-2.0
   2 /* Copyright(c) 2013 - 2019 Intel Corporation. */
   3 
   4 #include "fm10k.h"
   5 #include <linux/vmalloc.h>
   6 #include <net/udp_tunnel.h>
   7 #include <linux/if_macvlan.h>
   8 
   9 /**
  10  * fm10k_setup_tx_resources - allocate Tx resources (Descriptors)
  11  * @tx_ring:    tx descriptor ring (for a specific queue) to setup
  12  *
  13  * Return 0 on success, negative on failure
  14  **/
  15 int fm10k_setup_tx_resources(struct fm10k_ring *tx_ring)
  16 {
  17         struct device *dev = tx_ring->dev;
  18         int size;
  19 
  20         size = sizeof(struct fm10k_tx_buffer) * tx_ring->count;
  21 
  22         tx_ring->tx_buffer = vzalloc(size);
  23         if (!tx_ring->tx_buffer)
  24                 goto err;
  25 
  26         u64_stats_init(&tx_ring->syncp);
  27 
  28         /* round up to nearest 4K */
  29         tx_ring->size = tx_ring->count * sizeof(struct fm10k_tx_desc);
  30         tx_ring->size = ALIGN(tx_ring->size, 4096);
  31 
  32         tx_ring->desc = dma_alloc_coherent(dev, tx_ring->size,
  33                                            &tx_ring->dma, GFP_KERNEL);
  34         if (!tx_ring->desc)
  35                 goto err;
  36 
  37         return 0;
  38 
  39 err:
  40         vfree(tx_ring->tx_buffer);
  41         tx_ring->tx_buffer = NULL;
  42         return -ENOMEM;
  43 }
  44 
  45 /**
  46  * fm10k_setup_all_tx_resources - allocate all queues Tx resources
  47  * @interface: board private structure
  48  *
  49  * If this function returns with an error, then it's possible one or
  50  * more of the rings is populated (while the rest are not).  It is the
  51  * callers duty to clean those orphaned rings.
  52  *
  53  * Return 0 on success, negative on failure
  54  **/
  55 static int fm10k_setup_all_tx_resources(struct fm10k_intfc *interface)
  56 {
  57         int i, err;
  58 
  59         for (i = 0; i < interface->num_tx_queues; i++) {
  60                 err = fm10k_setup_tx_resources(interface->tx_ring[i]);
  61                 if (!err)
  62                         continue;
  63 
  64                 netif_err(interface, probe, interface->netdev,
  65                           "Allocation for Tx Queue %u failed\n", i);
  66                 goto err_setup_tx;
  67         }
  68 
  69         return 0;
  70 err_setup_tx:
  71         /* rewind the index freeing the rings as we go */
  72         while (i--)
  73                 fm10k_free_tx_resources(interface->tx_ring[i]);
  74         return err;
  75 }
  76 
  77 /**
  78  * fm10k_setup_rx_resources - allocate Rx resources (Descriptors)
  79  * @rx_ring:    rx descriptor ring (for a specific queue) to setup
  80  *
  81  * Returns 0 on success, negative on failure
  82  **/
  83 int fm10k_setup_rx_resources(struct fm10k_ring *rx_ring)
  84 {
  85         struct device *dev = rx_ring->dev;
  86         int size;
  87 
  88         size = sizeof(struct fm10k_rx_buffer) * rx_ring->count;
  89 
  90         rx_ring->rx_buffer = vzalloc(size);
  91         if (!rx_ring->rx_buffer)
  92                 goto err;
  93 
  94         u64_stats_init(&rx_ring->syncp);
  95 
  96         /* Round up to nearest 4K */
  97         rx_ring->size = rx_ring->count * sizeof(union fm10k_rx_desc);
  98         rx_ring->size = ALIGN(rx_ring->size, 4096);
  99 
 100         rx_ring->desc = dma_alloc_coherent(dev, rx_ring->size,
 101                                            &rx_ring->dma, GFP_KERNEL);
 102         if (!rx_ring->desc)
 103                 goto err;
 104 
 105         return 0;
 106 err:
 107         vfree(rx_ring->rx_buffer);
 108         rx_ring->rx_buffer = NULL;
 109         return -ENOMEM;
 110 }
 111 
 112 /**
 113  * fm10k_setup_all_rx_resources - allocate all queues Rx resources
 114  * @interface: board private structure
 115  *
 116  * If this function returns with an error, then it's possible one or
 117  * more of the rings is populated (while the rest are not).  It is the
 118  * callers duty to clean those orphaned rings.
 119  *
 120  * Return 0 on success, negative on failure
 121  **/
 122 static int fm10k_setup_all_rx_resources(struct fm10k_intfc *interface)
 123 {
 124         int i, err;
 125 
 126         for (i = 0; i < interface->num_rx_queues; i++) {
 127                 err = fm10k_setup_rx_resources(interface->rx_ring[i]);
 128                 if (!err)
 129                         continue;
 130 
 131                 netif_err(interface, probe, interface->netdev,
 132                           "Allocation for Rx Queue %u failed\n", i);
 133                 goto err_setup_rx;
 134         }
 135 
 136         return 0;
 137 err_setup_rx:
 138         /* rewind the index freeing the rings as we go */
 139         while (i--)
 140                 fm10k_free_rx_resources(interface->rx_ring[i]);
 141         return err;
 142 }
 143 
 144 void fm10k_unmap_and_free_tx_resource(struct fm10k_ring *ring,
 145                                       struct fm10k_tx_buffer *tx_buffer)
 146 {
 147         if (tx_buffer->skb) {
 148                 dev_kfree_skb_any(tx_buffer->skb);
 149                 if (dma_unmap_len(tx_buffer, len))
 150                         dma_unmap_single(ring->dev,
 151                                          dma_unmap_addr(tx_buffer, dma),
 152                                          dma_unmap_len(tx_buffer, len),
 153                                          DMA_TO_DEVICE);
 154         } else if (dma_unmap_len(tx_buffer, len)) {
 155                 dma_unmap_page(ring->dev,
 156                                dma_unmap_addr(tx_buffer, dma),
 157                                dma_unmap_len(tx_buffer, len),
 158                                DMA_TO_DEVICE);
 159         }
 160         tx_buffer->next_to_watch = NULL;
 161         tx_buffer->skb = NULL;
 162         dma_unmap_len_set(tx_buffer, len, 0);
 163         /* tx_buffer must be completely set up in the transmit path */
 164 }
 165 
 166 /**
 167  * fm10k_clean_tx_ring - Free Tx Buffers
 168  * @tx_ring: ring to be cleaned
 169  **/
 170 static void fm10k_clean_tx_ring(struct fm10k_ring *tx_ring)
 171 {
 172         unsigned long size;
 173         u16 i;
 174 
 175         /* ring already cleared, nothing to do */
 176         if (!tx_ring->tx_buffer)
 177                 return;
 178 
 179         /* Free all the Tx ring sk_buffs */
 180         for (i = 0; i < tx_ring->count; i++) {
 181                 struct fm10k_tx_buffer *tx_buffer = &tx_ring->tx_buffer[i];
 182 
 183                 fm10k_unmap_and_free_tx_resource(tx_ring, tx_buffer);
 184         }
 185 
 186         /* reset BQL values */
 187         netdev_tx_reset_queue(txring_txq(tx_ring));
 188 
 189         size = sizeof(struct fm10k_tx_buffer) * tx_ring->count;
 190         memset(tx_ring->tx_buffer, 0, size);
 191 
 192         /* Zero out the descriptor ring */
 193         memset(tx_ring->desc, 0, tx_ring->size);
 194 }
 195 
 196 /**
 197  * fm10k_free_tx_resources - Free Tx Resources per Queue
 198  * @tx_ring: Tx descriptor ring for a specific queue
 199  *
 200  * Free all transmit software resources
 201  **/
 202 void fm10k_free_tx_resources(struct fm10k_ring *tx_ring)
 203 {
 204         fm10k_clean_tx_ring(tx_ring);
 205 
 206         vfree(tx_ring->tx_buffer);
 207         tx_ring->tx_buffer = NULL;
 208 
 209         /* if not set, then don't free */
 210         if (!tx_ring->desc)
 211                 return;
 212 
 213         dma_free_coherent(tx_ring->dev, tx_ring->size,
 214                           tx_ring->desc, tx_ring->dma);
 215         tx_ring->desc = NULL;
 216 }
 217 
 218 /**
 219  * fm10k_clean_all_tx_rings - Free Tx Buffers for all queues
 220  * @interface: board private structure
 221  **/
 222 void fm10k_clean_all_tx_rings(struct fm10k_intfc *interface)
 223 {
 224         int i;
 225 
 226         for (i = 0; i < interface->num_tx_queues; i++)
 227                 fm10k_clean_tx_ring(interface->tx_ring[i]);
 228 }
 229 
 230 /**
 231  * fm10k_free_all_tx_resources - Free Tx Resources for All Queues
 232  * @interface: board private structure
 233  *
 234  * Free all transmit software resources
 235  **/
 236 static void fm10k_free_all_tx_resources(struct fm10k_intfc *interface)
 237 {
 238         int i = interface->num_tx_queues;
 239 
 240         while (i--)
 241                 fm10k_free_tx_resources(interface->tx_ring[i]);
 242 }
 243 
 244 /**
 245  * fm10k_clean_rx_ring - Free Rx Buffers per Queue
 246  * @rx_ring: ring to free buffers from
 247  **/
 248 static void fm10k_clean_rx_ring(struct fm10k_ring *rx_ring)
 249 {
 250         unsigned long size;
 251         u16 i;
 252 
 253         if (!rx_ring->rx_buffer)
 254                 return;
 255 
 256         dev_kfree_skb(rx_ring->skb);
 257         rx_ring->skb = NULL;
 258 
 259         /* Free all the Rx ring sk_buffs */
 260         for (i = 0; i < rx_ring->count; i++) {
 261                 struct fm10k_rx_buffer *buffer = &rx_ring->rx_buffer[i];
 262                 /* clean-up will only set page pointer to NULL */
 263                 if (!buffer->page)
 264                         continue;
 265 
 266                 dma_unmap_page(rx_ring->dev, buffer->dma,
 267                                PAGE_SIZE, DMA_FROM_DEVICE);
 268                 __free_page(buffer->page);
 269 
 270                 buffer->page = NULL;
 271         }
 272 
 273         size = sizeof(struct fm10k_rx_buffer) * rx_ring->count;
 274         memset(rx_ring->rx_buffer, 0, size);
 275 
 276         /* Zero out the descriptor ring */
 277         memset(rx_ring->desc, 0, rx_ring->size);
 278 
 279         rx_ring->next_to_alloc = 0;
 280         rx_ring->next_to_clean = 0;
 281         rx_ring->next_to_use = 0;
 282 }
 283 
 284 /**
 285  * fm10k_free_rx_resources - Free Rx Resources
 286  * @rx_ring: ring to clean the resources from
 287  *
 288  * Free all receive software resources
 289  **/
 290 void fm10k_free_rx_resources(struct fm10k_ring *rx_ring)
 291 {
 292         fm10k_clean_rx_ring(rx_ring);
 293 
 294         vfree(rx_ring->rx_buffer);
 295         rx_ring->rx_buffer = NULL;
 296 
 297         /* if not set, then don't free */
 298         if (!rx_ring->desc)
 299                 return;
 300 
 301         dma_free_coherent(rx_ring->dev, rx_ring->size,
 302                           rx_ring->desc, rx_ring->dma);
 303 
 304         rx_ring->desc = NULL;
 305 }
 306 
 307 /**
 308  * fm10k_clean_all_rx_rings - Free Rx Buffers for all queues
 309  * @interface: board private structure
 310  **/
 311 void fm10k_clean_all_rx_rings(struct fm10k_intfc *interface)
 312 {
 313         int i;
 314 
 315         for (i = 0; i < interface->num_rx_queues; i++)
 316                 fm10k_clean_rx_ring(interface->rx_ring[i]);
 317 }
 318 
 319 /**
 320  * fm10k_free_all_rx_resources - Free Rx Resources for All Queues
 321  * @interface: board private structure
 322  *
 323  * Free all receive software resources
 324  **/
 325 static void fm10k_free_all_rx_resources(struct fm10k_intfc *interface)
 326 {
 327         int i = interface->num_rx_queues;
 328 
 329         while (i--)
 330                 fm10k_free_rx_resources(interface->rx_ring[i]);
 331 }
 332 
 333 /**
 334  * fm10k_request_glort_range - Request GLORTs for use in configuring rules
 335  * @interface: board private structure
 336  *
 337  * This function allocates a range of glorts for this interface to use.
 338  **/
 339 static void fm10k_request_glort_range(struct fm10k_intfc *interface)
 340 {
 341         struct fm10k_hw *hw = &interface->hw;
 342         u16 mask = (~hw->mac.dglort_map) >> FM10K_DGLORTMAP_MASK_SHIFT;
 343 
 344         /* establish GLORT base */
 345         interface->glort = hw->mac.dglort_map & FM10K_DGLORTMAP_NONE;
 346         interface->glort_count = 0;
 347 
 348         /* nothing we can do until mask is allocated */
 349         if (hw->mac.dglort_map == FM10K_DGLORTMAP_NONE)
 350                 return;
 351 
 352         /* we support 3 possible GLORT configurations.
 353          * 1: VFs consume all but the last 1
 354          * 2: VFs and PF split glorts with possible gap between
 355          * 3: VFs allocated first 64, all others belong to PF
 356          */
 357         if (mask <= hw->iov.total_vfs) {
 358                 interface->glort_count = 1;
 359                 interface->glort += mask;
 360         } else if (mask < 64) {
 361                 interface->glort_count = (mask + 1) / 2;
 362                 interface->glort += interface->glort_count;
 363         } else {
 364                 interface->glort_count = mask - 63;
 365                 interface->glort += 64;
 366         }
 367 }
 368 
 369 /**
 370  * fm10k_free_udp_port_info
 371  * @interface: board private structure
 372  *
 373  * This function frees both geneve_port and vxlan_port structures
 374  **/
 375 static void fm10k_free_udp_port_info(struct fm10k_intfc *interface)
 376 {
 377         struct fm10k_udp_port *port;
 378 
 379         /* flush all entries from vxlan list */
 380         port = list_first_entry_or_null(&interface->vxlan_port,
 381                                         struct fm10k_udp_port, list);
 382         while (port) {
 383                 list_del(&port->list);
 384                 kfree(port);
 385                 port = list_first_entry_or_null(&interface->vxlan_port,
 386                                                 struct fm10k_udp_port,
 387                                                 list);
 388         }
 389 
 390         /* flush all entries from geneve list */
 391         port = list_first_entry_or_null(&interface->geneve_port,
 392                                         struct fm10k_udp_port, list);
 393         while (port) {
 394                 list_del(&port->list);
 395                 kfree(port);
 396                 port = list_first_entry_or_null(&interface->vxlan_port,
 397                                                 struct fm10k_udp_port,
 398                                                 list);
 399         }
 400 }
 401 
 402 /**
 403  * fm10k_restore_udp_port_info
 404  * @interface: board private structure
 405  *
 406  * This function restores the value in the tunnel_cfg register(s) after reset
 407  **/
 408 static void fm10k_restore_udp_port_info(struct fm10k_intfc *interface)
 409 {
 410         struct fm10k_hw *hw = &interface->hw;
 411         struct fm10k_udp_port *port;
 412 
 413         /* only the PF supports configuring tunnels */
 414         if (hw->mac.type != fm10k_mac_pf)
 415                 return;
 416 
 417         port = list_first_entry_or_null(&interface->vxlan_port,
 418                                         struct fm10k_udp_port, list);
 419 
 420         /* restore tunnel configuration register */
 421         fm10k_write_reg(hw, FM10K_TUNNEL_CFG,
 422                         (port ? ntohs(port->port) : 0) |
 423                         (ETH_P_TEB << FM10K_TUNNEL_CFG_NVGRE_SHIFT));
 424 
 425         port = list_first_entry_or_null(&interface->geneve_port,
 426                                         struct fm10k_udp_port, list);
 427 
 428         /* restore Geneve tunnel configuration register */
 429         fm10k_write_reg(hw, FM10K_TUNNEL_CFG_GENEVE,
 430                         (port ? ntohs(port->port) : 0));
 431 }
 432 
 433 static struct fm10k_udp_port *
 434 fm10k_remove_tunnel_port(struct list_head *ports,
 435                          struct udp_tunnel_info *ti)
 436 {
 437         struct fm10k_udp_port *port;
 438 
 439         list_for_each_entry(port, ports, list) {
 440                 if ((port->port == ti->port) &&
 441                     (port->sa_family == ti->sa_family)) {
 442                         list_del(&port->list);
 443                         return port;
 444                 }
 445         }
 446 
 447         return NULL;
 448 }
 449 
 450 static void fm10k_insert_tunnel_port(struct list_head *ports,
 451                                      struct udp_tunnel_info *ti)
 452 {
 453         struct fm10k_udp_port *port;
 454 
 455         /* remove existing port entry from the list so that the newest items
 456          * are always at the tail of the list.
 457          */
 458         port = fm10k_remove_tunnel_port(ports, ti);
 459         if (!port) {
 460                 port = kmalloc(sizeof(*port), GFP_ATOMIC);
 461                 if  (!port)
 462                         return;
 463                 port->port = ti->port;
 464                 port->sa_family = ti->sa_family;
 465         }
 466 
 467         list_add_tail(&port->list, ports);
 468 }
 469 
 470 /**
 471  * fm10k_udp_tunnel_add
 472  * @dev: network interface device structure
 473  * @ti: Tunnel endpoint information
 474  *
 475  * This function is called when a new UDP tunnel port has been added.
 476  * Due to hardware restrictions, only one port per type can be offloaded at
 477  * once.
 478  **/
 479 static void fm10k_udp_tunnel_add(struct net_device *dev,
 480                                  struct udp_tunnel_info *ti)
 481 {
 482         struct fm10k_intfc *interface = netdev_priv(dev);
 483 
 484         /* only the PF supports configuring tunnels */
 485         if (interface->hw.mac.type != fm10k_mac_pf)
 486                 return;
 487 
 488         switch (ti->type) {
 489         case UDP_TUNNEL_TYPE_VXLAN:
 490                 fm10k_insert_tunnel_port(&interface->vxlan_port, ti);
 491                 break;
 492         case UDP_TUNNEL_TYPE_GENEVE:
 493                 fm10k_insert_tunnel_port(&interface->geneve_port, ti);
 494                 break;
 495         default:
 496                 return;
 497         }
 498 
 499         fm10k_restore_udp_port_info(interface);
 500 }
 501 
 502 /**
 503  * fm10k_udp_tunnel_del
 504  * @dev: network interface device structure
 505  * @ti: Tunnel end point information
 506  *
 507  * This function is called when a new UDP tunnel port is deleted. The freed
 508  * port will be removed from the list, then we reprogram the offloaded port
 509  * based on the head of the list.
 510  **/
 511 static void fm10k_udp_tunnel_del(struct net_device *dev,
 512                                  struct udp_tunnel_info *ti)
 513 {
 514         struct fm10k_intfc *interface = netdev_priv(dev);
 515         struct fm10k_udp_port *port = NULL;
 516 
 517         if (interface->hw.mac.type != fm10k_mac_pf)
 518                 return;
 519 
 520         switch (ti->type) {
 521         case UDP_TUNNEL_TYPE_VXLAN:
 522                 port = fm10k_remove_tunnel_port(&interface->vxlan_port, ti);
 523                 break;
 524         case UDP_TUNNEL_TYPE_GENEVE:
 525                 port = fm10k_remove_tunnel_port(&interface->geneve_port, ti);
 526                 break;
 527         default:
 528                 return;
 529         }
 530 
 531         /* if we did remove a port we need to free its memory */
 532         kfree(port);
 533 
 534         fm10k_restore_udp_port_info(interface);
 535 }
 536 
 537 /**
 538  * fm10k_open - Called when a network interface is made active
 539  * @netdev: network interface device structure
 540  *
 541  * Returns 0 on success, negative value on failure
 542  *
 543  * The open entry point is called when a network interface is made
 544  * active by the system (IFF_UP).  At this point all resources needed
 545  * for transmit and receive operations are allocated, the interrupt
 546  * handler is registered with the OS, the watchdog timer is started,
 547  * and the stack is notified that the interface is ready.
 548  **/
 549 int fm10k_open(struct net_device *netdev)
 550 {
 551         struct fm10k_intfc *interface = netdev_priv(netdev);
 552         int err;
 553 
 554         /* allocate transmit descriptors */
 555         err = fm10k_setup_all_tx_resources(interface);
 556         if (err)
 557                 goto err_setup_tx;
 558 
 559         /* allocate receive descriptors */
 560         err = fm10k_setup_all_rx_resources(interface);
 561         if (err)
 562                 goto err_setup_rx;
 563 
 564         /* allocate interrupt resources */
 565         err = fm10k_qv_request_irq(interface);
 566         if (err)
 567                 goto err_req_irq;
 568 
 569         /* setup GLORT assignment for this port */
 570         fm10k_request_glort_range(interface);
 571 
 572         /* Notify the stack of the actual queue counts */
 573         err = netif_set_real_num_tx_queues(netdev,
 574                                            interface->num_tx_queues);
 575         if (err)
 576                 goto err_set_queues;
 577 
 578         err = netif_set_real_num_rx_queues(netdev,
 579                                            interface->num_rx_queues);
 580         if (err)
 581                 goto err_set_queues;
 582 
 583         udp_tunnel_get_rx_info(netdev);
 584 
 585         fm10k_up(interface);
 586 
 587         return 0;
 588 
 589 err_set_queues:
 590         fm10k_qv_free_irq(interface);
 591 err_req_irq:
 592         fm10k_free_all_rx_resources(interface);
 593 err_setup_rx:
 594         fm10k_free_all_tx_resources(interface);
 595 err_setup_tx:
 596         return err;
 597 }
 598 
 599 /**
 600  * fm10k_close - Disables a network interface
 601  * @netdev: network interface device structure
 602  *
 603  * Returns 0, this is not allowed to fail
 604  *
 605  * The close entry point is called when an interface is de-activated
 606  * by the OS.  The hardware is still under the drivers control, but
 607  * needs to be disabled.  A global MAC reset is issued to stop the
 608  * hardware, and all transmit and receive resources are freed.
 609  **/
 610 int fm10k_close(struct net_device *netdev)
 611 {
 612         struct fm10k_intfc *interface = netdev_priv(netdev);
 613 
 614         fm10k_down(interface);
 615 
 616         fm10k_qv_free_irq(interface);
 617 
 618         fm10k_free_udp_port_info(interface);
 619 
 620         fm10k_free_all_tx_resources(interface);
 621         fm10k_free_all_rx_resources(interface);
 622 
 623         return 0;
 624 }
 625 
 626 static netdev_tx_t fm10k_xmit_frame(struct sk_buff *skb, struct net_device *dev)
 627 {
 628         struct fm10k_intfc *interface = netdev_priv(dev);
 629         int num_tx_queues = READ_ONCE(interface->num_tx_queues);
 630         unsigned int r_idx = skb->queue_mapping;
 631         int err;
 632 
 633         if (!num_tx_queues)
 634                 return NETDEV_TX_BUSY;
 635 
 636         if ((skb->protocol == htons(ETH_P_8021Q)) &&
 637             !skb_vlan_tag_present(skb)) {
 638                 /* FM10K only supports hardware tagging, any tags in frame
 639                  * are considered 2nd level or "outer" tags
 640                  */
 641                 struct vlan_hdr *vhdr;
 642                 __be16 proto;
 643 
 644                 /* make sure skb is not shared */
 645                 skb = skb_share_check(skb, GFP_ATOMIC);
 646                 if (!skb)
 647                         return NETDEV_TX_OK;
 648 
 649                 /* make sure there is enough room to move the ethernet header */
 650                 if (unlikely(!pskb_may_pull(skb, VLAN_ETH_HLEN)))
 651                         return NETDEV_TX_OK;
 652 
 653                 /* verify the skb head is not shared */
 654                 err = skb_cow_head(skb, 0);
 655                 if (err) {
 656                         dev_kfree_skb(skb);
 657                         return NETDEV_TX_OK;
 658                 }
 659 
 660                 /* locate VLAN header */
 661                 vhdr = (struct vlan_hdr *)(skb->data + ETH_HLEN);
 662 
 663                 /* pull the 2 key pieces of data out of it */
 664                 __vlan_hwaccel_put_tag(skb,
 665                                        htons(ETH_P_8021Q),
 666                                        ntohs(vhdr->h_vlan_TCI));
 667                 proto = vhdr->h_vlan_encapsulated_proto;
 668                 skb->protocol = (ntohs(proto) >= 1536) ? proto :
 669                                                          htons(ETH_P_802_2);
 670 
 671                 /* squash it by moving the ethernet addresses up 4 bytes */
 672                 memmove(skb->data + VLAN_HLEN, skb->data, 12);
 673                 __skb_pull(skb, VLAN_HLEN);
 674                 skb_reset_mac_header(skb);
 675         }
 676 
 677         /* The minimum packet size for a single buffer is 17B so pad the skb
 678          * in order to meet this minimum size requirement.
 679          */
 680         if (unlikely(skb->len < 17)) {
 681                 int pad_len = 17 - skb->len;
 682 
 683                 if (skb_pad(skb, pad_len))
 684                         return NETDEV_TX_OK;
 685                 __skb_put(skb, pad_len);
 686         }
 687 
 688         if (r_idx >= num_tx_queues)
 689                 r_idx %= num_tx_queues;
 690 
 691         err = fm10k_xmit_frame_ring(skb, interface->tx_ring[r_idx]);
 692 
 693         return err;
 694 }
 695 
 696 /**
 697  * fm10k_tx_timeout - Respond to a Tx Hang
 698  * @netdev: network interface device structure
 699  **/
 700 static void fm10k_tx_timeout(struct net_device *netdev)
 701 {
 702         struct fm10k_intfc *interface = netdev_priv(netdev);
 703         bool real_tx_hang = false;
 704         int i;
 705 
 706 #define TX_TIMEO_LIMIT 16000
 707         for (i = 0; i < interface->num_tx_queues; i++) {
 708                 struct fm10k_ring *tx_ring = interface->tx_ring[i];
 709 
 710                 if (check_for_tx_hang(tx_ring) && fm10k_check_tx_hang(tx_ring))
 711                         real_tx_hang = true;
 712         }
 713 
 714         if (real_tx_hang) {
 715                 fm10k_tx_timeout_reset(interface);
 716         } else {
 717                 netif_info(interface, drv, netdev,
 718                            "Fake Tx hang detected with timeout of %d seconds\n",
 719                            netdev->watchdog_timeo / HZ);
 720 
 721                 /* fake Tx hang - increase the kernel timeout */
 722                 if (netdev->watchdog_timeo < TX_TIMEO_LIMIT)
 723                         netdev->watchdog_timeo *= 2;
 724         }
 725 }
 726 
 727 /**
 728  * fm10k_host_mbx_ready - Check PF interface's mailbox readiness
 729  * @interface: board private structure
 730  *
 731  * This function checks if the PF interface's mailbox is ready before queueing
 732  * mailbox messages for transmission. This will prevent filling the TX mailbox
 733  * queue when the receiver is not ready. VF interfaces are exempt from this
 734  * check since it will block all PF-VF mailbox messages from being sent from
 735  * the VF to the PF at initialization.
 736  **/
 737 static bool fm10k_host_mbx_ready(struct fm10k_intfc *interface)
 738 {
 739         struct fm10k_hw *hw = &interface->hw;
 740 
 741         return (hw->mac.type == fm10k_mac_vf || interface->host_ready);
 742 }
 743 
 744 /**
 745  * fm10k_queue_vlan_request - Queue a VLAN update request
 746  * @interface: the fm10k interface structure
 747  * @vid: the VLAN vid
 748  * @vsi: VSI index number
 749  * @set: whether to set or clear
 750  *
 751  * This function queues up a VLAN update. For VFs, this must be sent to the
 752  * managing PF over the mailbox. For PFs, we'll use the same handling so that
 753  * it's similar to the VF. This avoids storming the PF<->VF mailbox with too
 754  * many VLAN updates during reset.
 755  */
 756 int fm10k_queue_vlan_request(struct fm10k_intfc *interface,
 757                              u32 vid, u8 vsi, bool set)
 758 {
 759         struct fm10k_macvlan_request *request;
 760         unsigned long flags;
 761 
 762         /* This must be atomic since we may be called while the netdev
 763          * addr_list_lock is held
 764          */
 765         request = kzalloc(sizeof(*request), GFP_ATOMIC);
 766         if (!request)
 767                 return -ENOMEM;
 768 
 769         request->type = FM10K_VLAN_REQUEST;
 770         request->vlan.vid = vid;
 771         request->vlan.vsi = vsi;
 772         request->set = set;
 773 
 774         spin_lock_irqsave(&interface->macvlan_lock, flags);
 775         list_add_tail(&request->list, &interface->macvlan_requests);
 776         spin_unlock_irqrestore(&interface->macvlan_lock, flags);
 777 
 778         fm10k_macvlan_schedule(interface);
 779 
 780         return 0;
 781 }
 782 
 783 /**
 784  * fm10k_queue_mac_request - Queue a MAC update request
 785  * @interface: the fm10k interface structure
 786  * @glort: the target glort for this update
 787  * @addr: the address to update
 788  * @vid: the vid to update
 789  * @set: whether to add or remove
 790  *
 791  * This function queues up a MAC request for sending to the switch manager.
 792  * A separate thread monitors the queue and sends updates to the switch
 793  * manager. Return 0 on success, and negative error code on failure.
 794  **/
 795 int fm10k_queue_mac_request(struct fm10k_intfc *interface, u16 glort,
 796                             const unsigned char *addr, u16 vid, bool set)
 797 {
 798         struct fm10k_macvlan_request *request;
 799         unsigned long flags;
 800 
 801         /* This must be atomic since we may be called while the netdev
 802          * addr_list_lock is held
 803          */
 804         request = kzalloc(sizeof(*request), GFP_ATOMIC);
 805         if (!request)
 806                 return -ENOMEM;
 807 
 808         if (is_multicast_ether_addr(addr))
 809                 request->type = FM10K_MC_MAC_REQUEST;
 810         else
 811                 request->type = FM10K_UC_MAC_REQUEST;
 812 
 813         ether_addr_copy(request->mac.addr, addr);
 814         request->mac.glort = glort;
 815         request->mac.vid = vid;
 816         request->set = set;
 817 
 818         spin_lock_irqsave(&interface->macvlan_lock, flags);
 819         list_add_tail(&request->list, &interface->macvlan_requests);
 820         spin_unlock_irqrestore(&interface->macvlan_lock, flags);
 821 
 822         fm10k_macvlan_schedule(interface);
 823 
 824         return 0;
 825 }
 826 
 827 /**
 828  * fm10k_clear_macvlan_queue - Cancel pending updates for a given glort
 829  * @interface: the fm10k interface structure
 830  * @glort: the target glort to clear
 831  * @vlans: true to clear VLAN messages, false to ignore them
 832  *
 833  * Cancel any outstanding MAC/VLAN requests for a given glort. This is
 834  * expected to be called when a logical port goes down.
 835  **/
 836 void fm10k_clear_macvlan_queue(struct fm10k_intfc *interface,
 837                                u16 glort, bool vlans)
 838 
 839 {
 840         struct fm10k_macvlan_request *r, *tmp;
 841         unsigned long flags;
 842 
 843         spin_lock_irqsave(&interface->macvlan_lock, flags);
 844 
 845         /* Free any outstanding MAC/VLAN requests for this interface */
 846         list_for_each_entry_safe(r, tmp, &interface->macvlan_requests, list) {
 847                 switch (r->type) {
 848                 case FM10K_MC_MAC_REQUEST:
 849                 case FM10K_UC_MAC_REQUEST:
 850                         /* Don't free requests for other interfaces */
 851                         if (r->mac.glort != glort)
 852                                 break;
 853                         /* fall through */
 854                 case FM10K_VLAN_REQUEST:
 855                         if (vlans) {
 856                                 list_del(&r->list);
 857                                 kfree(r);
 858                         }
 859                         break;
 860                 }
 861         }
 862 
 863         spin_unlock_irqrestore(&interface->macvlan_lock, flags);
 864 }
 865 
 866 static int fm10k_uc_vlan_unsync(struct net_device *netdev,
 867                                 const unsigned char *uc_addr)
 868 {
 869         struct fm10k_intfc *interface = netdev_priv(netdev);
 870         u16 glort = interface->glort;
 871         u16 vid = interface->vid;
 872         bool set = !!(vid / VLAN_N_VID);
 873         int err;
 874 
 875         /* drop any leading bits on the VLAN ID */
 876         vid &= VLAN_N_VID - 1;
 877 
 878         err = fm10k_queue_mac_request(interface, glort, uc_addr, vid, set);
 879         if (err)
 880                 return err;
 881 
 882         /* return non-zero value as we are only doing a partial sync/unsync */
 883         return 1;
 884 }
 885 
 886 static int fm10k_mc_vlan_unsync(struct net_device *netdev,
 887                                 const unsigned char *mc_addr)
 888 {
 889         struct fm10k_intfc *interface = netdev_priv(netdev);
 890         u16 glort = interface->glort;
 891         u16 vid = interface->vid;
 892         bool set = !!(vid / VLAN_N_VID);
 893         int err;
 894 
 895         /* drop any leading bits on the VLAN ID */
 896         vid &= VLAN_N_VID - 1;
 897 
 898         err = fm10k_queue_mac_request(interface, glort, mc_addr, vid, set);
 899         if (err)
 900                 return err;
 901 
 902         /* return non-zero value as we are only doing a partial sync/unsync */
 903         return 1;
 904 }
 905 
 906 static int fm10k_update_vid(struct net_device *netdev, u16 vid, bool set)
 907 {
 908         struct fm10k_intfc *interface = netdev_priv(netdev);
 909         struct fm10k_l2_accel *l2_accel = interface->l2_accel;
 910         struct fm10k_hw *hw = &interface->hw;
 911         u16 glort;
 912         s32 err;
 913         int i;
 914 
 915         /* updates do not apply to VLAN 0 */
 916         if (!vid)
 917                 return 0;
 918 
 919         if (vid >= VLAN_N_VID)
 920                 return -EINVAL;
 921 
 922         /* Verify that we have permission to add VLANs. If this is a request
 923          * to remove a VLAN, we still want to allow the user to remove the
 924          * VLAN device. In that case, we need to clear the bit in the
 925          * active_vlans bitmask.
 926          */
 927         if (set && hw->mac.vlan_override)
 928                 return -EACCES;
 929 
 930         /* update active_vlans bitmask */
 931         set_bit(vid, interface->active_vlans);
 932         if (!set)
 933                 clear_bit(vid, interface->active_vlans);
 934 
 935         /* disable the default VLAN ID on ring if we have an active VLAN */
 936         for (i = 0; i < interface->num_rx_queues; i++) {
 937                 struct fm10k_ring *rx_ring = interface->rx_ring[i];
 938                 u16 rx_vid = rx_ring->vid & (VLAN_N_VID - 1);
 939 
 940                 if (test_bit(rx_vid, interface->active_vlans))
 941                         rx_ring->vid |= FM10K_VLAN_CLEAR;
 942                 else
 943                         rx_ring->vid &= ~FM10K_VLAN_CLEAR;
 944         }
 945 
 946         /* If our VLAN has been overridden, there is no reason to send VLAN
 947          * removal requests as they will be silently ignored.
 948          */
 949         if (hw->mac.vlan_override)
 950                 return 0;
 951 
 952         /* Do not remove default VLAN ID related entries from VLAN and MAC
 953          * tables
 954          */
 955         if (!set && vid == hw->mac.default_vid)
 956                 return 0;
 957 
 958         /* Do not throw an error if the interface is down. We will sync once
 959          * we come up
 960          */
 961         if (test_bit(__FM10K_DOWN, interface->state))
 962                 return 0;
 963 
 964         fm10k_mbx_lock(interface);
 965 
 966         /* only need to update the VLAN if not in promiscuous mode */
 967         if (!(netdev->flags & IFF_PROMISC)) {
 968                 err = fm10k_queue_vlan_request(interface, vid, 0, set);
 969                 if (err)
 970                         goto err_out;
 971         }
 972 
 973         /* Update our base MAC address */
 974         err = fm10k_queue_mac_request(interface, interface->glort,
 975                                       hw->mac.addr, vid, set);
 976         if (err)
 977                 goto err_out;
 978 
 979         /* Update L2 accelerated macvlan addresses */
 980         if (l2_accel) {
 981                 for (i = 0; i < l2_accel->size; i++) {
 982                         struct net_device *sdev = l2_accel->macvlan[i];
 983 
 984                         if (!sdev)
 985                                 continue;
 986 
 987                         glort = l2_accel->dglort + 1 + i;
 988 
 989                         fm10k_queue_mac_request(interface, glort,
 990                                                 sdev->dev_addr,
 991                                                 vid, set);
 992                 }
 993         }
 994 
 995         /* set VLAN ID prior to syncing/unsyncing the VLAN */
 996         interface->vid = vid + (set ? VLAN_N_VID : 0);
 997 
 998         /* Update the unicast and multicast address list to add/drop VLAN */
 999         __dev_uc_unsync(netdev, fm10k_uc_vlan_unsync);
1000         __dev_mc_unsync(netdev, fm10k_mc_vlan_unsync);
1001 
1002 err_out:
1003         fm10k_mbx_unlock(interface);
1004 
1005         return err;
1006 }
1007 
1008 static int fm10k_vlan_rx_add_vid(struct net_device *netdev,
1009                                  __always_unused __be16 proto, u16 vid)
1010 {
1011         /* update VLAN and address table based on changes */
1012         return fm10k_update_vid(netdev, vid, true);
1013 }
1014 
1015 static int fm10k_vlan_rx_kill_vid(struct net_device *netdev,
1016                                   __always_unused __be16 proto, u16 vid)
1017 {
1018         /* update VLAN and address table based on changes */
1019         return fm10k_update_vid(netdev, vid, false);
1020 }
1021 
1022 static u16 fm10k_find_next_vlan(struct fm10k_intfc *interface, u16 vid)
1023 {
1024         struct fm10k_hw *hw = &interface->hw;
1025         u16 default_vid = hw->mac.default_vid;
1026         u16 vid_limit = vid < default_vid ? default_vid : VLAN_N_VID;
1027 
1028         vid = find_next_bit(interface->active_vlans, vid_limit, ++vid);
1029 
1030         return vid;
1031 }
1032 
1033 static void fm10k_clear_unused_vlans(struct fm10k_intfc *interface)
1034 {
1035         u32 vid, prev_vid;
1036 
1037         /* loop through and find any gaps in the table */
1038         for (vid = 0, prev_vid = 0;
1039              prev_vid < VLAN_N_VID;
1040              prev_vid = vid + 1, vid = fm10k_find_next_vlan(interface, vid)) {
1041                 if (prev_vid == vid)
1042                         continue;
1043 
1044                 /* send request to clear multiple bits at a time */
1045                 prev_vid += (vid - prev_vid - 1) << FM10K_VLAN_LENGTH_SHIFT;
1046                 fm10k_queue_vlan_request(interface, prev_vid, 0, false);
1047         }
1048 }
1049 
1050 static int __fm10k_uc_sync(struct net_device *dev,
1051                            const unsigned char *addr, bool sync)
1052 {
1053         struct fm10k_intfc *interface = netdev_priv(dev);
1054         u16 vid, glort = interface->glort;
1055         s32 err;
1056 
1057         if (!is_valid_ether_addr(addr))
1058                 return -EADDRNOTAVAIL;
1059 
1060         for (vid = fm10k_find_next_vlan(interface, 0);
1061              vid < VLAN_N_VID;
1062              vid = fm10k_find_next_vlan(interface, vid)) {
1063                 err = fm10k_queue_mac_request(interface, glort,
1064                                               addr, vid, sync);
1065                 if (err)
1066                         return err;
1067         }
1068 
1069         return 0;
1070 }
1071 
1072 static int fm10k_uc_sync(struct net_device *dev,
1073                          const unsigned char *addr)
1074 {
1075         return __fm10k_uc_sync(dev, addr, true);
1076 }
1077 
1078 static int fm10k_uc_unsync(struct net_device *dev,
1079                            const unsigned char *addr)
1080 {
1081         return __fm10k_uc_sync(dev, addr, false);
1082 }
1083 
1084 static int fm10k_set_mac(struct net_device *dev, void *p)
1085 {
1086         struct fm10k_intfc *interface = netdev_priv(dev);
1087         struct fm10k_hw *hw = &interface->hw;
1088         struct sockaddr *addr = p;
1089         s32 err = 0;
1090 
1091         if (!is_valid_ether_addr(addr->sa_data))
1092                 return -EADDRNOTAVAIL;
1093 
1094         if (dev->flags & IFF_UP) {
1095                 /* setting MAC address requires mailbox */
1096                 fm10k_mbx_lock(interface);
1097 
1098                 err = fm10k_uc_sync(dev, addr->sa_data);
1099                 if (!err)
1100                         fm10k_uc_unsync(dev, hw->mac.addr);
1101 
1102                 fm10k_mbx_unlock(interface);
1103         }
1104 
1105         if (!err) {
1106                 ether_addr_copy(dev->dev_addr, addr->sa_data);
1107                 ether_addr_copy(hw->mac.addr, addr->sa_data);
1108                 dev->addr_assign_type &= ~NET_ADDR_RANDOM;
1109         }
1110 
1111         /* if we had a mailbox error suggest trying again */
1112         return err ? -EAGAIN : 0;
1113 }
1114 
1115 static int __fm10k_mc_sync(struct net_device *dev,
1116                            const unsigned char *addr, bool sync)
1117 {
1118         struct fm10k_intfc *interface = netdev_priv(dev);
1119         u16 vid, glort = interface->glort;
1120         s32 err;
1121 
1122         if (!is_multicast_ether_addr(addr))
1123                 return -EADDRNOTAVAIL;
1124 
1125         for (vid = fm10k_find_next_vlan(interface, 0);
1126              vid < VLAN_N_VID;
1127              vid = fm10k_find_next_vlan(interface, vid)) {
1128                 err = fm10k_queue_mac_request(interface, glort,
1129                                               addr, vid, sync);
1130                 if (err)
1131                         return err;
1132         }
1133 
1134         return 0;
1135 }
1136 
1137 static int fm10k_mc_sync(struct net_device *dev,
1138                          const unsigned char *addr)
1139 {
1140         return __fm10k_mc_sync(dev, addr, true);
1141 }
1142 
1143 static int fm10k_mc_unsync(struct net_device *dev,
1144                            const unsigned char *addr)
1145 {
1146         return __fm10k_mc_sync(dev, addr, false);
1147 }
1148 
1149 static void fm10k_set_rx_mode(struct net_device *dev)
1150 {
1151         struct fm10k_intfc *interface = netdev_priv(dev);
1152         struct fm10k_hw *hw = &interface->hw;
1153         int xcast_mode;
1154 
1155         /* no need to update the harwdare if we are not running */
1156         if (!(dev->flags & IFF_UP))
1157                 return;
1158 
1159         /* determine new mode based on flags */
1160         xcast_mode = (dev->flags & IFF_PROMISC) ? FM10K_XCAST_MODE_PROMISC :
1161                      (dev->flags & IFF_ALLMULTI) ? FM10K_XCAST_MODE_ALLMULTI :
1162                      (dev->flags & (IFF_BROADCAST | IFF_MULTICAST)) ?
1163                      FM10K_XCAST_MODE_MULTI : FM10K_XCAST_MODE_NONE;
1164 
1165         fm10k_mbx_lock(interface);
1166 
1167         /* update xcast mode first, but only if it changed */
1168         if (interface->xcast_mode != xcast_mode) {
1169                 /* update VLAN table when entering promiscuous mode */
1170                 if (xcast_mode == FM10K_XCAST_MODE_PROMISC)
1171                         fm10k_queue_vlan_request(interface, FM10K_VLAN_ALL,
1172                                                  0, true);
1173 
1174                 /* clear VLAN table when exiting promiscuous mode */
1175                 if (interface->xcast_mode == FM10K_XCAST_MODE_PROMISC)
1176                         fm10k_clear_unused_vlans(interface);
1177 
1178                 /* update xcast mode if host's mailbox is ready */
1179                 if (fm10k_host_mbx_ready(interface))
1180                         hw->mac.ops.update_xcast_mode(hw, interface->glort,
1181                                                       xcast_mode);
1182 
1183                 /* record updated xcast mode state */
1184                 interface->xcast_mode = xcast_mode;
1185         }
1186 
1187         /* synchronize all of the addresses */
1188         __dev_uc_sync(dev, fm10k_uc_sync, fm10k_uc_unsync);
1189         __dev_mc_sync(dev, fm10k_mc_sync, fm10k_mc_unsync);
1190 
1191         fm10k_mbx_unlock(interface);
1192 }
1193 
1194 void fm10k_restore_rx_state(struct fm10k_intfc *interface)
1195 {
1196         struct fm10k_l2_accel *l2_accel = interface->l2_accel;
1197         struct net_device *netdev = interface->netdev;
1198         struct fm10k_hw *hw = &interface->hw;
1199         int xcast_mode, i;
1200         u16 vid, glort;
1201 
1202         /* record glort for this interface */
1203         glort = interface->glort;
1204 
1205         /* convert interface flags to xcast mode */
1206         if (netdev->flags & IFF_PROMISC)
1207                 xcast_mode = FM10K_XCAST_MODE_PROMISC;
1208         else if (netdev->flags & IFF_ALLMULTI)
1209                 xcast_mode = FM10K_XCAST_MODE_ALLMULTI;
1210         else if (netdev->flags & (IFF_BROADCAST | IFF_MULTICAST))
1211                 xcast_mode = FM10K_XCAST_MODE_MULTI;
1212         else
1213                 xcast_mode = FM10K_XCAST_MODE_NONE;
1214 
1215         fm10k_mbx_lock(interface);
1216 
1217         /* Enable logical port if host's mailbox is ready */
1218         if (fm10k_host_mbx_ready(interface))
1219                 hw->mac.ops.update_lport_state(hw, glort,
1220                                                interface->glort_count, true);
1221 
1222         /* update VLAN table */
1223         fm10k_queue_vlan_request(interface, FM10K_VLAN_ALL, 0,
1224                                  xcast_mode == FM10K_XCAST_MODE_PROMISC);
1225 
1226         /* update table with current entries */
1227         for (vid = fm10k_find_next_vlan(interface, 0);
1228              vid < VLAN_N_VID;
1229              vid = fm10k_find_next_vlan(interface, vid)) {
1230                 fm10k_queue_vlan_request(interface, vid, 0, true);
1231 
1232                 fm10k_queue_mac_request(interface, glort,
1233                                         hw->mac.addr, vid, true);
1234 
1235                 /* synchronize macvlan addresses */
1236                 if (l2_accel) {
1237                         for (i = 0; i < l2_accel->size; i++) {
1238                                 struct net_device *sdev = l2_accel->macvlan[i];
1239 
1240                                 if (!sdev)
1241                                         continue;
1242 
1243                                 glort = l2_accel->dglort + 1 + i;
1244 
1245                                 fm10k_queue_mac_request(interface, glort,
1246                                                         sdev->dev_addr,
1247                                                         vid, true);
1248                         }
1249                 }
1250         }
1251 
1252         /* update xcast mode before synchronizing addresses if host's mailbox
1253          * is ready
1254          */
1255         if (fm10k_host_mbx_ready(interface))
1256                 hw->mac.ops.update_xcast_mode(hw, glort, xcast_mode);
1257 
1258         /* synchronize all of the addresses */
1259         __dev_uc_sync(netdev, fm10k_uc_sync, fm10k_uc_unsync);
1260         __dev_mc_sync(netdev, fm10k_mc_sync, fm10k_mc_unsync);
1261 
1262         /* synchronize macvlan addresses */
1263         if (l2_accel) {
1264                 for (i = 0; i < l2_accel->size; i++) {
1265                         struct net_device *sdev = l2_accel->macvlan[i];
1266 
1267                         if (!sdev)
1268                                 continue;
1269 
1270                         glort = l2_accel->dglort + 1 + i;
1271 
1272                         hw->mac.ops.update_xcast_mode(hw, glort,
1273                                                       FM10K_XCAST_MODE_NONE);
1274                         fm10k_queue_mac_request(interface, glort,
1275                                                 sdev->dev_addr,
1276                                                 hw->mac.default_vid, true);
1277                 }
1278         }
1279 
1280         fm10k_mbx_unlock(interface);
1281 
1282         /* record updated xcast mode state */
1283         interface->xcast_mode = xcast_mode;
1284 
1285         /* Restore tunnel configuration */
1286         fm10k_restore_udp_port_info(interface);
1287 }
1288 
1289 void fm10k_reset_rx_state(struct fm10k_intfc *interface)
1290 {
1291         struct net_device *netdev = interface->netdev;
1292         struct fm10k_hw *hw = &interface->hw;
1293 
1294         /* Wait for MAC/VLAN work to finish */
1295         while (test_bit(__FM10K_MACVLAN_SCHED, interface->state))
1296                 usleep_range(1000, 2000);
1297 
1298         /* Cancel pending MAC/VLAN requests */
1299         fm10k_clear_macvlan_queue(interface, interface->glort, true);
1300 
1301         fm10k_mbx_lock(interface);
1302 
1303         /* clear the logical port state on lower device if host's mailbox is
1304          * ready
1305          */
1306         if (fm10k_host_mbx_ready(interface))
1307                 hw->mac.ops.update_lport_state(hw, interface->glort,
1308                                                interface->glort_count, false);
1309 
1310         fm10k_mbx_unlock(interface);
1311 
1312         /* reset flags to default state */
1313         interface->xcast_mode = FM10K_XCAST_MODE_NONE;
1314 
1315         /* clear the sync flag since the lport has been dropped */
1316         __dev_uc_unsync(netdev, NULL);
1317         __dev_mc_unsync(netdev, NULL);
1318 }
1319 
1320 /**
1321  * fm10k_get_stats64 - Get System Network Statistics
1322  * @netdev: network interface device structure
1323  * @stats: storage space for 64bit statistics
1324  *
1325  * Obtain 64bit statistics in a way that is safe for both 32bit and 64bit
1326  * architectures.
1327  */
1328 static void fm10k_get_stats64(struct net_device *netdev,
1329                               struct rtnl_link_stats64 *stats)
1330 {
1331         struct fm10k_intfc *interface = netdev_priv(netdev);
1332         struct fm10k_ring *ring;
1333         unsigned int start, i;
1334         u64 bytes, packets;
1335 
1336         rcu_read_lock();
1337 
1338         for (i = 0; i < interface->num_rx_queues; i++) {
1339                 ring = READ_ONCE(interface->rx_ring[i]);
1340 
1341                 if (!ring)
1342                         continue;
1343 
1344                 do {
1345                         start = u64_stats_fetch_begin_irq(&ring->syncp);
1346                         packets = ring->stats.packets;
1347                         bytes   = ring->stats.bytes;
1348                 } while (u64_stats_fetch_retry_irq(&ring->syncp, start));
1349 
1350                 stats->rx_packets += packets;
1351                 stats->rx_bytes   += bytes;
1352         }
1353 
1354         for (i = 0; i < interface->num_tx_queues; i++) {
1355                 ring = READ_ONCE(interface->tx_ring[i]);
1356 
1357                 if (!ring)
1358                         continue;
1359 
1360                 do {
1361                         start = u64_stats_fetch_begin_irq(&ring->syncp);
1362                         packets = ring->stats.packets;
1363                         bytes   = ring->stats.bytes;
1364                 } while (u64_stats_fetch_retry_irq(&ring->syncp, start));
1365 
1366                 stats->tx_packets += packets;
1367                 stats->tx_bytes   += bytes;
1368         }
1369 
1370         rcu_read_unlock();
1371 
1372         /* following stats updated by fm10k_service_task() */
1373         stats->rx_missed_errors = netdev->stats.rx_missed_errors;
1374 }
1375 
1376 int fm10k_setup_tc(struct net_device *dev, u8 tc)
1377 {
1378         struct fm10k_intfc *interface = netdev_priv(dev);
1379         int err;
1380 
1381         /* Currently only the PF supports priority classes */
1382         if (tc && (interface->hw.mac.type != fm10k_mac_pf))
1383                 return -EINVAL;
1384 
1385         /* Hardware supports up to 8 traffic classes */
1386         if (tc > 8)
1387                 return -EINVAL;
1388 
1389         /* Hardware has to reinitialize queues to match packet
1390          * buffer alignment. Unfortunately, the hardware is not
1391          * flexible enough to do this dynamically.
1392          */
1393         if (netif_running(dev))
1394                 fm10k_close(dev);
1395 
1396         fm10k_mbx_free_irq(interface);
1397 
1398         fm10k_clear_queueing_scheme(interface);
1399 
1400         /* we expect the prio_tc map to be repopulated later */
1401         netdev_reset_tc(dev);
1402         netdev_set_num_tc(dev, tc);
1403 
1404         err = fm10k_init_queueing_scheme(interface);
1405         if (err)
1406                 goto err_queueing_scheme;
1407 
1408         err = fm10k_mbx_request_irq(interface);
1409         if (err)
1410                 goto err_mbx_irq;
1411 
1412         err = netif_running(dev) ? fm10k_open(dev) : 0;
1413         if (err)
1414                 goto err_open;
1415 
1416         /* flag to indicate SWPRI has yet to be updated */
1417         set_bit(FM10K_FLAG_SWPRI_CONFIG, interface->flags);
1418 
1419         return 0;
1420 err_open:
1421         fm10k_mbx_free_irq(interface);
1422 err_mbx_irq:
1423         fm10k_clear_queueing_scheme(interface);
1424 err_queueing_scheme:
1425         netif_device_detach(dev);
1426 
1427         return err;
1428 }
1429 
1430 static int __fm10k_setup_tc(struct net_device *dev, enum tc_setup_type type,
1431                             void *type_data)
1432 {
1433         struct tc_mqprio_qopt *mqprio = type_data;
1434 
1435         if (type != TC_SETUP_QDISC_MQPRIO)
1436                 return -EOPNOTSUPP;
1437 
1438         mqprio->hw = TC_MQPRIO_HW_OFFLOAD_TCS;
1439 
1440         return fm10k_setup_tc(dev, mqprio->num_tc);
1441 }
1442 
1443 static void fm10k_assign_l2_accel(struct fm10k_intfc *interface,
1444                                   struct fm10k_l2_accel *l2_accel)
1445 {
1446         int i;
1447 
1448         for (i = 0; i < interface->num_rx_queues; i++) {
1449                 struct fm10k_ring *ring = interface->rx_ring[i];
1450 
1451                 rcu_assign_pointer(ring->l2_accel, l2_accel);
1452         }
1453 
1454         interface->l2_accel = l2_accel;
1455 }
1456 
1457 static void *fm10k_dfwd_add_station(struct net_device *dev,
1458                                     struct net_device *sdev)
1459 {
1460         struct fm10k_intfc *interface = netdev_priv(dev);
1461         struct fm10k_l2_accel *l2_accel = interface->l2_accel;
1462         struct fm10k_l2_accel *old_l2_accel = NULL;
1463         struct fm10k_dglort_cfg dglort = { 0 };
1464         struct fm10k_hw *hw = &interface->hw;
1465         int size, i;
1466         u16 vid, glort;
1467 
1468         /* The hardware supported by fm10k only filters on the destination MAC
1469          * address. In order to avoid issues we only support offloading modes
1470          * where the hardware can actually provide the functionality.
1471          */
1472         if (!macvlan_supports_dest_filter(sdev))
1473                 return ERR_PTR(-EMEDIUMTYPE);
1474 
1475         /* allocate l2 accel structure if it is not available */
1476         if (!l2_accel) {
1477                 /* verify there is enough free GLORTs to support l2_accel */
1478                 if (interface->glort_count < 7)
1479                         return ERR_PTR(-EBUSY);
1480 
1481                 size = offsetof(struct fm10k_l2_accel, macvlan[7]);
1482                 l2_accel = kzalloc(size, GFP_KERNEL);
1483                 if (!l2_accel)
1484                         return ERR_PTR(-ENOMEM);
1485 
1486                 l2_accel->size = 7;
1487                 l2_accel->dglort = interface->glort;
1488 
1489                 /* update pointers */
1490                 fm10k_assign_l2_accel(interface, l2_accel);
1491         /* do not expand if we are at our limit */
1492         } else if ((l2_accel->count == FM10K_MAX_STATIONS) ||
1493                    (l2_accel->count == (interface->glort_count - 1))) {
1494                 return ERR_PTR(-EBUSY);
1495         /* expand if we have hit the size limit */
1496         } else if (l2_accel->count == l2_accel->size) {
1497                 old_l2_accel = l2_accel;
1498                 size = offsetof(struct fm10k_l2_accel,
1499                                 macvlan[(l2_accel->size * 2) + 1]);
1500                 l2_accel = kzalloc(size, GFP_KERNEL);
1501                 if (!l2_accel)
1502                         return ERR_PTR(-ENOMEM);
1503 
1504                 memcpy(l2_accel, old_l2_accel,
1505                        offsetof(struct fm10k_l2_accel,
1506                                 macvlan[old_l2_accel->size]));
1507 
1508                 l2_accel->size = (old_l2_accel->size * 2) + 1;
1509 
1510                 /* update pointers */
1511                 fm10k_assign_l2_accel(interface, l2_accel);
1512                 kfree_rcu(old_l2_accel, rcu);
1513         }
1514 
1515         /* add macvlan to accel table, and record GLORT for position */
1516         for (i = 0; i < l2_accel->size; i++) {
1517                 if (!l2_accel->macvlan[i])
1518                         break;
1519         }
1520 
1521         /* record station */
1522         l2_accel->macvlan[i] = sdev;
1523         l2_accel->count++;
1524 
1525         /* configure default DGLORT mapping for RSS/DCB */
1526         dglort.idx = fm10k_dglort_pf_rss;
1527         dglort.inner_rss = 1;
1528         dglort.rss_l = fls(interface->ring_feature[RING_F_RSS].mask);
1529         dglort.pc_l = fls(interface->ring_feature[RING_F_QOS].mask);
1530         dglort.glort = interface->glort;
1531         dglort.shared_l = fls(l2_accel->size);
1532         hw->mac.ops.configure_dglort_map(hw, &dglort);
1533 
1534         /* Add rules for this specific dglort to the switch */
1535         fm10k_mbx_lock(interface);
1536 
1537         glort = l2_accel->dglort + 1 + i;
1538 
1539         if (fm10k_host_mbx_ready(interface))
1540                 hw->mac.ops.update_xcast_mode(hw, glort,
1541                                               FM10K_XCAST_MODE_NONE);
1542 
1543         fm10k_queue_mac_request(interface, glort, sdev->dev_addr,
1544                                 hw->mac.default_vid, true);
1545 
1546         for (vid = fm10k_find_next_vlan(interface, 0);
1547              vid < VLAN_N_VID;
1548              vid = fm10k_find_next_vlan(interface, vid))
1549                 fm10k_queue_mac_request(interface, glort, sdev->dev_addr,
1550                                         vid, true);
1551 
1552         fm10k_mbx_unlock(interface);
1553 
1554         return sdev;
1555 }
1556 
1557 static void fm10k_dfwd_del_station(struct net_device *dev, void *priv)
1558 {
1559         struct fm10k_intfc *interface = netdev_priv(dev);
1560         struct fm10k_l2_accel *l2_accel = READ_ONCE(interface->l2_accel);
1561         struct fm10k_dglort_cfg dglort = { 0 };
1562         struct fm10k_hw *hw = &interface->hw;
1563         struct net_device *sdev = priv;
1564         u16 vid, glort;
1565         int i;
1566 
1567         if (!l2_accel)
1568                 return;
1569 
1570         /* search table for matching interface */
1571         for (i = 0; i < l2_accel->size; i++) {
1572                 if (l2_accel->macvlan[i] == sdev)
1573                         break;
1574         }
1575 
1576         /* exit if macvlan not found */
1577         if (i == l2_accel->size)
1578                 return;
1579 
1580         /* Remove any rules specific to this dglort */
1581         fm10k_mbx_lock(interface);
1582 
1583         glort = l2_accel->dglort + 1 + i;
1584 
1585         if (fm10k_host_mbx_ready(interface))
1586                 hw->mac.ops.update_xcast_mode(hw, glort,
1587                                               FM10K_XCAST_MODE_NONE);
1588 
1589         fm10k_queue_mac_request(interface, glort, sdev->dev_addr,
1590                                 hw->mac.default_vid, false);
1591 
1592         for (vid = fm10k_find_next_vlan(interface, 0);
1593              vid < VLAN_N_VID;
1594              vid = fm10k_find_next_vlan(interface, vid))
1595                 fm10k_queue_mac_request(interface, glort, sdev->dev_addr,
1596                                         vid, false);
1597 
1598         fm10k_mbx_unlock(interface);
1599 
1600         /* record removal */
1601         l2_accel->macvlan[i] = NULL;
1602         l2_accel->count--;
1603 
1604         /* configure default DGLORT mapping for RSS/DCB */
1605         dglort.idx = fm10k_dglort_pf_rss;
1606         dglort.inner_rss = 1;
1607         dglort.rss_l = fls(interface->ring_feature[RING_F_RSS].mask);
1608         dglort.pc_l = fls(interface->ring_feature[RING_F_QOS].mask);
1609         dglort.glort = interface->glort;
1610         dglort.shared_l = fls(l2_accel->size);
1611         hw->mac.ops.configure_dglort_map(hw, &dglort);
1612 
1613         /* If table is empty remove it */
1614         if (l2_accel->count == 0) {
1615                 fm10k_assign_l2_accel(interface, NULL);
1616                 kfree_rcu(l2_accel, rcu);
1617         }
1618 }
1619 
1620 static netdev_features_t fm10k_features_check(struct sk_buff *skb,
1621                                               struct net_device *dev,
1622                                               netdev_features_t features)
1623 {
1624         if (!skb->encapsulation || fm10k_tx_encap_offload(skb))
1625                 return features;
1626 
1627         return features & ~(NETIF_F_CSUM_MASK | NETIF_F_GSO_MASK);
1628 }
1629 
1630 static const struct net_device_ops fm10k_netdev_ops = {
1631         .ndo_open               = fm10k_open,
1632         .ndo_stop               = fm10k_close,
1633         .ndo_validate_addr      = eth_validate_addr,
1634         .ndo_start_xmit         = fm10k_xmit_frame,
1635         .ndo_set_mac_address    = fm10k_set_mac,
1636         .ndo_tx_timeout         = fm10k_tx_timeout,
1637         .ndo_vlan_rx_add_vid    = fm10k_vlan_rx_add_vid,
1638         .ndo_vlan_rx_kill_vid   = fm10k_vlan_rx_kill_vid,
1639         .ndo_set_rx_mode        = fm10k_set_rx_mode,
1640         .ndo_get_stats64        = fm10k_get_stats64,
1641         .ndo_setup_tc           = __fm10k_setup_tc,
1642         .ndo_set_vf_mac         = fm10k_ndo_set_vf_mac,
1643         .ndo_set_vf_vlan        = fm10k_ndo_set_vf_vlan,
1644         .ndo_set_vf_rate        = fm10k_ndo_set_vf_bw,
1645         .ndo_get_vf_config      = fm10k_ndo_get_vf_config,
1646         .ndo_udp_tunnel_add     = fm10k_udp_tunnel_add,
1647         .ndo_udp_tunnel_del     = fm10k_udp_tunnel_del,
1648         .ndo_dfwd_add_station   = fm10k_dfwd_add_station,
1649         .ndo_dfwd_del_station   = fm10k_dfwd_del_station,
1650         .ndo_features_check     = fm10k_features_check,
1651 };
1652 
1653 #define DEFAULT_DEBUG_LEVEL_SHIFT 3
1654 
1655 struct net_device *fm10k_alloc_netdev(const struct fm10k_info *info)
1656 {
1657         netdev_features_t hw_features;
1658         struct fm10k_intfc *interface;
1659         struct net_device *dev;
1660 
1661         dev = alloc_etherdev_mq(sizeof(struct fm10k_intfc), MAX_QUEUES);
1662         if (!dev)
1663                 return NULL;
1664 
1665         /* set net device and ethtool ops */
1666         dev->netdev_ops = &fm10k_netdev_ops;
1667         fm10k_set_ethtool_ops(dev);
1668 
1669         /* configure default debug level */
1670         interface = netdev_priv(dev);
1671         interface->msg_enable = BIT(DEFAULT_DEBUG_LEVEL_SHIFT) - 1;
1672 
1673         /* configure default features */
1674         dev->features |= NETIF_F_IP_CSUM |
1675                          NETIF_F_IPV6_CSUM |
1676                          NETIF_F_SG |
1677                          NETIF_F_TSO |
1678                          NETIF_F_TSO6 |
1679                          NETIF_F_TSO_ECN |
1680                          NETIF_F_RXHASH |
1681                          NETIF_F_RXCSUM;
1682 
1683         /* Only the PF can support VXLAN and NVGRE tunnel offloads */
1684         if (info->mac == fm10k_mac_pf) {
1685                 dev->hw_enc_features = NETIF_F_IP_CSUM |
1686                                        NETIF_F_TSO |
1687                                        NETIF_F_TSO6 |
1688                                        NETIF_F_TSO_ECN |
1689                                        NETIF_F_GSO_UDP_TUNNEL |
1690                                        NETIF_F_IPV6_CSUM |
1691                                        NETIF_F_SG;
1692 
1693                 dev->features |= NETIF_F_GSO_UDP_TUNNEL;
1694         }
1695 
1696         /* all features defined to this point should be changeable */
1697         hw_features = dev->features;
1698 
1699         /* allow user to enable L2 forwarding acceleration */
1700         hw_features |= NETIF_F_HW_L2FW_DOFFLOAD;
1701 
1702         /* configure VLAN features */
1703         dev->vlan_features |= dev->features;
1704 
1705         /* we want to leave these both on as we cannot disable VLAN tag
1706          * insertion or stripping on the hardware since it is contained
1707          * in the FTAG and not in the frame itself.
1708          */
1709         dev->features |= NETIF_F_HW_VLAN_CTAG_TX |
1710                          NETIF_F_HW_VLAN_CTAG_RX |
1711                          NETIF_F_HW_VLAN_CTAG_FILTER;
1712 
1713         dev->priv_flags |= IFF_UNICAST_FLT;
1714 
1715         dev->hw_features |= hw_features;
1716 
1717         /* MTU range: 68 - 15342 */
1718         dev->min_mtu = ETH_MIN_MTU;
1719         dev->max_mtu = FM10K_MAX_JUMBO_FRAME_SIZE;
1720 
1721         return dev;
1722 }
/* [<][>][^][v][top][bottom][index][help] */
root/drivers/net/ethernet/intel/fm10k/fm10k_netdev.c

DEFINITIONS
