drivers/net/ethernet/aquantia/atlantic/aq_nic.c

   1 /*
   2  * aQuantia Corporation Network Driver
   3  * Copyright (C) 2014-2017 aQuantia Corporation. All rights reserved
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms and conditions of the GNU General Public License,
   7  * version 2, as published by the Free Software Foundation.
   8  */
   9
  10 /* File aq_nic.c: Definition of common code for NIC. */
  11
  12 #include "aq_nic.h"
  13 #include "aq_ring.h"
  14 #include "aq_vec.h"
  15 #include "aq_hw.h"
  16 #include "aq_pci_func.h"
  17 #include "aq_nic_internal.h"
  18
  19 #include <linux/netdevice.h>
  20 #include <linux/etherdevice.h>
  21 #include <linux/timer.h>
  22 #include <linux/cpu.h>
  23 #include <linux/ip.h>
  24 #include <linux/tcp.h>
  25 #include <net/ip.h>
  26
  27 static void aq_nic_rss_init(struct aq_nic_s *self, unsigned int num_rss_queues)
  28 {
  29         struct aq_nic_cfg_s *cfg = &self->aq_nic_cfg;
  30         struct aq_rss_parameters *rss_params = &cfg->aq_rss;
  31         int i = 0;
  32
  33         static u8 rss_key[40] = {
  34                 0x1e, 0xad, 0x71, 0x87, 0x65, 0xfc, 0x26, 0x7d,
  35                 0x0d, 0x45, 0x67, 0x74, 0xcd, 0x06, 0x1a, 0x18,
  36                 0xb6, 0xc1, 0xf0, 0xc7, 0xbb, 0x18, 0xbe, 0xf8,
  37                 0x19, 0x13, 0x4b, 0xa9, 0xd0, 0x3e, 0xfe, 0x70,
  38                 0x25, 0x03, 0xab, 0x50, 0x6a, 0x8b, 0x82, 0x0c
  39         };
  40
  41         rss_params->hash_secret_key_size = sizeof(rss_key);
  42         memcpy(rss_params->hash_secret_key, rss_key, sizeof(rss_key));
  43         rss_params->indirection_table_size = AQ_CFG_RSS_INDIRECTION_TABLE_MAX;
  44
  45         for (i = rss_params->indirection_table_size; i--;)
  46                 rss_params->indirection_table[i] = i & (num_rss_queues - 1);
  47 }
  48
  49 /* Fills aq_nic_cfg with valid defaults */
  50 static void aq_nic_cfg_init_defaults(struct aq_nic_s *self)
  51 {
  52         struct aq_nic_cfg_s *cfg = &self->aq_nic_cfg;
  53
  54         cfg->aq_hw_caps = &self->aq_hw_caps;
  55
  56         cfg->vecs = AQ_CFG_VECS_DEF;
  57         cfg->tcs = AQ_CFG_TCS_DEF;
  58
  59         cfg->rxds = AQ_CFG_RXDS_DEF;
  60         cfg->txds = AQ_CFG_TXDS_DEF;
  61
  62         cfg->is_polling = AQ_CFG_IS_POLLING_DEF;
  63
  64         cfg->is_interrupt_moderation = AQ_CFG_IS_INTERRUPT_MODERATION_DEF;
  65         cfg->itr = cfg->is_interrupt_moderation ?
  66                 AQ_CFG_INTERRUPT_MODERATION_RATE_DEF : 0U;
  67
  68         cfg->is_rss = AQ_CFG_IS_RSS_DEF;
  69         cfg->num_rss_queues = AQ_CFG_NUM_RSS_QUEUES_DEF;
  70         cfg->aq_rss.base_cpu_number = AQ_CFG_RSS_BASE_CPU_NUM_DEF;
  71         cfg->flow_control = AQ_CFG_FC_MODE;
  72
  73         cfg->mtu = AQ_CFG_MTU_DEF;
  74         cfg->link_speed_msk = AQ_CFG_SPEED_MSK;
  75         cfg->is_autoneg = AQ_CFG_IS_AUTONEG_DEF;
  76
  77         cfg->is_lro = AQ_CFG_IS_LRO_DEF;
  78
  79         cfg->vlan_id = 0U;
  80
  81         aq_nic_rss_init(self, cfg->num_rss_queues);
  82 }
  83
  84 /* Checks hw_caps and 'corrects' aq_nic_cfg in runtime */
  85 int aq_nic_cfg_start(struct aq_nic_s *self)
  86 {
  87         struct aq_nic_cfg_s *cfg = &self->aq_nic_cfg;
  88
  89         /*descriptors */
  90         cfg->rxds = min(cfg->rxds, cfg->aq_hw_caps->rxds);
  91         cfg->txds = min(cfg->txds, cfg->aq_hw_caps->txds);
  92
  93         /*rss rings */
  94         cfg->vecs = min(cfg->vecs, cfg->aq_hw_caps->vecs);
  95         cfg->vecs = min(cfg->vecs, num_online_cpus());
  96         /* cfg->vecs should be power of 2 for RSS */
  97         if (cfg->vecs >= 8U)
  98                 cfg->vecs = 8U;
  99         else if (cfg->vecs >= 4U)
 100                 cfg->vecs = 4U;
 101         else if (cfg->vecs >= 2U)
 102                 cfg->vecs = 2U;
 103         else
 104                 cfg->vecs = 1U;
 105
 106         cfg->num_rss_queues = min(cfg->vecs, AQ_CFG_NUM_RSS_QUEUES_DEF);
 107
 108         cfg->irq_type = aq_pci_func_get_irq_type(self->aq_pci_func);
 109
 110         if ((cfg->irq_type == AQ_HW_IRQ_LEGACY) ||
 111             (self->aq_hw_caps.vecs == 1U) ||
 112             (cfg->vecs == 1U)) {
 113                 cfg->is_rss = 0U;
 114                 cfg->vecs = 1U;
 115         }
 116
 117         cfg->link_speed_msk &= self->aq_hw_caps.link_speed_msk;
 118         cfg->hw_features = self->aq_hw_caps.hw_features;
 119         return 0;
 120 }
 121
 122 static void aq_nic_service_timer_cb(unsigned long param)
 123 {
 124         struct aq_nic_s *self = (struct aq_nic_s *)param;
 125         struct net_device *ndev = aq_nic_get_ndev(self);
 126         int err = 0;
 127         unsigned int i = 0U;
 128         struct aq_ring_stats_rx_s stats_rx;
 129         struct aq_ring_stats_tx_s stats_tx;
 130
 131         if (aq_utils_obj_test(&self->header.flags, AQ_NIC_FLAGS_IS_NOT_READY))
 132                 goto err_exit;
 133
 134         err = self->aq_hw_ops.hw_get_link_status(self->aq_hw);
 135         if (err < 0)
 136                 goto err_exit;
 137
 138         self->link_status = self->aq_hw->aq_link_status;
 139
 140         self->aq_hw_ops.hw_interrupt_moderation_set(self->aq_hw,
 141                     self->aq_nic_cfg.is_interrupt_moderation);
 142
 143         if (self->link_status.mbps) {
 144                 aq_utils_obj_set(&self->header.flags,
 145                                  AQ_NIC_FLAG_STARTED);
 146                 aq_utils_obj_clear(&self->header.flags,
 147                                    AQ_NIC_LINK_DOWN);
 148                 netif_carrier_on(self->ndev);
 149         } else {
 150                 netif_carrier_off(self->ndev);
 151                 aq_utils_obj_set(&self->header.flags, AQ_NIC_LINK_DOWN);
 152         }
 153
 154         memset(&stats_rx, 0U, sizeof(struct aq_ring_stats_rx_s));
 155         memset(&stats_tx, 0U, sizeof(struct aq_ring_stats_tx_s));
 156         for (i = AQ_DIMOF(self->aq_vec); i--;) {
 157                 if (self->aq_vec[i])
 158                         aq_vec_add_stats(self->aq_vec[i], &stats_rx, &stats_tx);
 159         }
 160
 161         ndev->stats.rx_packets = stats_rx.packets;
 162         ndev->stats.rx_bytes = stats_rx.bytes;
 163         ndev->stats.rx_errors = stats_rx.errors;
 164         ndev->stats.tx_packets = stats_tx.packets;
 165         ndev->stats.tx_bytes = stats_tx.bytes;
 166         ndev->stats.tx_errors = stats_tx.errors;
 167
 168 err_exit:
 169         mod_timer(&self->service_timer,
 170                   jiffies + AQ_CFG_SERVICE_TIMER_INTERVAL);
 171 }
 172
 173 static void aq_nic_polling_timer_cb(unsigned long param)
 174 {
 175         struct aq_nic_s *self = (struct aq_nic_s *)param;
 176         struct aq_vec_s *aq_vec = NULL;
 177         unsigned int i = 0U;
 178
 179         for (i = 0U, aq_vec = self->aq_vec[0];
 180                 self->aq_vecs > i; ++i, aq_vec = self->aq_vec[i])
 181                 aq_vec_isr(i, (void *)aq_vec);
 182
 183         mod_timer(&self->polling_timer, jiffies +
 184                 AQ_CFG_POLLING_TIMER_INTERVAL);
 185 }
 186
 187 static struct net_device *aq_nic_ndev_alloc(void)
 188 {
 189         return alloc_etherdev_mq(sizeof(struct aq_nic_s), AQ_CFG_VECS_MAX);
 190 }
 191
 192 struct aq_nic_s *aq_nic_alloc_cold(const struct net_device_ops *ndev_ops,
 193                                    const struct ethtool_ops *et_ops,
 194                                    struct device *dev,
 195                                    struct aq_pci_func_s *aq_pci_func,
 196                                    unsigned int port,
 197                                    const struct aq_hw_ops *aq_hw_ops)
 198 {
 199         struct net_device *ndev = NULL;
 200         struct aq_nic_s *self = NULL;
 201         int err = 0;
 202
 203         ndev = aq_nic_ndev_alloc();
 204         if (!ndev) {
 205                 err = -ENOMEM;
 206                 goto err_exit;
 207         }
 208
 209         self = netdev_priv(ndev);
 210
 211         ndev->netdev_ops = ndev_ops;
 212         ndev->ethtool_ops = et_ops;
 213
 214         SET_NETDEV_DEV(ndev, dev);
 215
 216         ndev->if_port = port;
 217         ndev->min_mtu = ETH_MIN_MTU;
 218         self->ndev = ndev;
 219
 220         self->aq_pci_func = aq_pci_func;
 221
 222         self->aq_hw_ops = *aq_hw_ops;
 223         self->port = (u8)port;
 224
 225         self->aq_hw = self->aq_hw_ops.create(aq_pci_func, self->port,
 226                                                 &self->aq_hw_ops);
 227         err = self->aq_hw_ops.get_hw_caps(self->aq_hw, &self->aq_hw_caps);
 228         if (err < 0)
 229                 goto err_exit;
 230
 231         aq_nic_cfg_init_defaults(self);
 232
 233 err_exit:
 234         if (err < 0) {
 235                 aq_nic_free_hot_resources(self);
 236                 self = NULL;
 237         }
 238         return self;
 239 }
 240
 241 int aq_nic_ndev_register(struct aq_nic_s *self)
 242 {
 243         int err = 0;
 244         unsigned int i = 0U;
 245
 246         if (!self->ndev) {
 247                 err = -EINVAL;
 248                 goto err_exit;
 249         }
 250         err = self->aq_hw_ops.hw_get_mac_permanent(self->aq_hw,
 251                             self->aq_nic_cfg.aq_hw_caps,
 252                             self->ndev->dev_addr);
 253         if (err < 0)
 254                 goto err_exit;
 255
 256 #if defined(AQ_CFG_MAC_ADDR_PERMANENT)
 257         {
 258                 static u8 mac_addr_permanent[] = AQ_CFG_MAC_ADDR_PERMANENT;
 259
 260                 ether_addr_copy(self->ndev->dev_addr, mac_addr_permanent);
 261         }
 262 #endif
 263
 264         netif_carrier_off(self->ndev);
 265
 266         for (i = AQ_CFG_VECS_MAX; i--;)
 267                 aq_nic_ndev_queue_stop(self, i);
 268
 269         err = register_netdev(self->ndev);
 270         if (err < 0)
 271                 goto err_exit;
 272
 273 err_exit:
 274         return err;
 275 }
 276
 277 int aq_nic_ndev_init(struct aq_nic_s *self)
 278 {
 279         struct aq_hw_caps_s *aq_hw_caps = self->aq_nic_cfg.aq_hw_caps;
 280         struct aq_nic_cfg_s *aq_nic_cfg = &self->aq_nic_cfg;
 281
 282         self->ndev->hw_features |= aq_hw_caps->hw_features;
 283         self->ndev->features = aq_hw_caps->hw_features;
 284         self->ndev->priv_flags = aq_hw_caps->hw_priv_flags;
 285         self->ndev->mtu = aq_nic_cfg->mtu - ETH_HLEN;
 286
 287         return 0;
 288 }
 289
 290 void aq_nic_ndev_free(struct aq_nic_s *self)
 291 {
 292         if (!self->ndev)
 293                 goto err_exit;
 294
 295         if (self->ndev->reg_state == NETREG_REGISTERED)
 296                 unregister_netdev(self->ndev);
 297
 298         if (self->aq_hw)
 299                 self->aq_hw_ops.destroy(self->aq_hw);
 300
 301         free_netdev(self->ndev);
 302
 303 err_exit:;
 304 }
 305
 306 struct aq_nic_s *aq_nic_alloc_hot(struct net_device *ndev)
 307 {
 308         struct aq_nic_s *self = NULL;
 309         int err = 0;
 310
 311         if (!ndev) {
 312                 err = -EINVAL;
 313                 goto err_exit;
 314         }
 315         self = netdev_priv(ndev);
 316
 317         if (!self) {
 318                 err = -EINVAL;
 319                 goto err_exit;
 320         }
 321         if (netif_running(ndev)) {
 322                 unsigned int i;
 323
 324                 for (i = AQ_CFG_VECS_MAX; i--;)
 325                         netif_stop_subqueue(ndev, i);
 326         }
 327
 328         for (self->aq_vecs = 0; self->aq_vecs < self->aq_nic_cfg.vecs;
 329                 self->aq_vecs++) {
 330                 self->aq_vec[self->aq_vecs] =
 331                     aq_vec_alloc(self, self->aq_vecs, &self->aq_nic_cfg);
 332                 if (!self->aq_vec[self->aq_vecs]) {
 333                         err = -ENOMEM;
 334                         goto err_exit;
 335                 }
 336         }
 337
 338 err_exit:
 339         if (err < 0) {
 340                 aq_nic_free_hot_resources(self);
 341                 self = NULL;
 342         }
 343         return self;
 344 }
 345
 346 void aq_nic_set_tx_ring(struct aq_nic_s *self, unsigned int idx,
 347                         struct aq_ring_s *ring)
 348 {
 349         self->aq_ring_tx[idx] = ring;
 350 }
 351
 352 struct device *aq_nic_get_dev(struct aq_nic_s *self)
 353 {
 354         return self->ndev->dev.parent;
 355 }
 356
 357 struct net_device *aq_nic_get_ndev(struct aq_nic_s *self)
 358 {
 359         return self->ndev;
 360 }
 361
 362 int aq_nic_init(struct aq_nic_s *self)
 363 {
 364         struct aq_vec_s *aq_vec = NULL;
 365         int err = 0;
 366         unsigned int i = 0U;
 367
 368         self->power_state = AQ_HW_POWER_STATE_D0;
 369         err = self->aq_hw_ops.hw_reset(self->aq_hw);
 370         if (err < 0)
 371                 goto err_exit;
 372
 373         err = self->aq_hw_ops.hw_init(self->aq_hw, &self->aq_nic_cfg,
 374                             aq_nic_get_ndev(self)->dev_addr);
 375         if (err < 0)
 376                 goto err_exit;
 377
 378         for (i = 0U, aq_vec = self->aq_vec[0];
 379                 self->aq_vecs > i; ++i, aq_vec = self->aq_vec[i])
 380                 aq_vec_init(aq_vec, &self->aq_hw_ops, self->aq_hw);
 381
 382 err_exit:
 383         return err;
 384 }
 385
 386 void aq_nic_ndev_queue_start(struct aq_nic_s *self, unsigned int idx)
 387 {
 388         netif_start_subqueue(self->ndev, idx);
 389 }
 390
 391 void aq_nic_ndev_queue_stop(struct aq_nic_s *self, unsigned int idx)
 392 {
 393         netif_stop_subqueue(self->ndev, idx);
 394 }
 395
 396 int aq_nic_start(struct aq_nic_s *self)
 397 {
 398         struct aq_vec_s *aq_vec = NULL;
 399         int err = 0;
 400         unsigned int i = 0U;
 401
 402         err = self->aq_hw_ops.hw_multicast_list_set(self->aq_hw,
 403                                                     self->mc_list.ar,
 404                                                     self->mc_list.count);
 405         if (err < 0)
 406                 goto err_exit;
 407
 408         err = self->aq_hw_ops.hw_packet_filter_set(self->aq_hw,
 409                                                    self->packet_filter);
 410         if (err < 0)
 411                 goto err_exit;
 412
 413         for (i = 0U, aq_vec = self->aq_vec[0];
 414                 self->aq_vecs > i; ++i, aq_vec = self->aq_vec[i]) {
 415                 err = aq_vec_start(aq_vec);
 416                 if (err < 0)
 417                         goto err_exit;
 418         }
 419
 420         err = self->aq_hw_ops.hw_start(self->aq_hw);
 421         if (err < 0)
 422                 goto err_exit;
 423
 424         err = self->aq_hw_ops.hw_interrupt_moderation_set(self->aq_hw,
 425                             self->aq_nic_cfg.is_interrupt_moderation);
 426         if (err < 0)
 427                 goto err_exit;
 428         setup_timer(&self->service_timer, &aq_nic_service_timer_cb,
 429                     (unsigned long)self);
 430         mod_timer(&self->service_timer, jiffies +
 431                         AQ_CFG_SERVICE_TIMER_INTERVAL);
 432
 433         if (self->aq_nic_cfg.is_polling) {
 434                 setup_timer(&self->polling_timer, &aq_nic_polling_timer_cb,
 435                             (unsigned long)self);
 436                 mod_timer(&self->polling_timer, jiffies +
 437                           AQ_CFG_POLLING_TIMER_INTERVAL);
 438         } else {
 439                 for (i = 0U, aq_vec = self->aq_vec[0];
 440                         self->aq_vecs > i; ++i, aq_vec = self->aq_vec[i]) {
 441                         err = aq_pci_func_alloc_irq(self->aq_pci_func, i,
 442                                                     self->ndev->name, aq_vec,
 443                                         aq_vec_get_affinity_mask(aq_vec));
 444                         if (err < 0)
 445                                 goto err_exit;
 446                 }
 447
 448                 err = self->aq_hw_ops.hw_irq_enable(self->aq_hw,
 449                                     AQ_CFG_IRQ_MASK);
 450                 if (err < 0)
 451                         goto err_exit;
 452         }
 453
 454         for (i = 0U, aq_vec = self->aq_vec[0];
 455                 self->aq_vecs > i; ++i, aq_vec = self->aq_vec[i])
 456                 aq_nic_ndev_queue_start(self, i);
 457
 458         err = netif_set_real_num_tx_queues(self->ndev, self->aq_vecs);
 459         if (err < 0)
 460                 goto err_exit;
 461
 462         err = netif_set_real_num_rx_queues(self->ndev, self->aq_vecs);
 463         if (err < 0)
 464                 goto err_exit;
 465
 466 err_exit:
 467         return err;
 468 }
 469
 470 static unsigned int aq_nic_map_skb(struct aq_nic_s *self,
 471                                    struct sk_buff *skb,
 472                                    struct aq_ring_s *ring)
 473 {
 474         unsigned int ret = 0U;
 475         unsigned int nr_frags = skb_shinfo(skb)->nr_frags;
 476         unsigned int frag_count = 0U;
 477         unsigned int dx = ring->sw_tail;
 478         struct aq_ring_buff_s *dx_buff = &ring->buff_ring[dx];
 479
 480         if (unlikely(skb_is_gso(skb))) {
 481                 dx_buff->flags = 0U;
 482                 dx_buff->len_pkt = skb->len;
 483                 dx_buff->len_l2 = ETH_HLEN;
 484                 dx_buff->len_l3 = ip_hdrlen(skb);
 485                 dx_buff->len_l4 = tcp_hdrlen(skb);
 486                 dx_buff->mss = skb_shinfo(skb)->gso_size;
 487                 dx_buff->is_txc = 1U;
 488
 489                 dx_buff->is_ipv6 =
 490                         (ip_hdr(skb)->version == 6) ? 1U : 0U;
 491
 492                 dx = aq_ring_next_dx(ring, dx);
 493                 dx_buff = &ring->buff_ring[dx];
 494                 ++ret;
 495         }
 496
 497         dx_buff->flags = 0U;
 498         dx_buff->len = skb_headlen(skb);
 499         dx_buff->pa = dma_map_single(aq_nic_get_dev(self),
 500                                      skb->data,
 501                                      dx_buff->len,
 502                                      DMA_TO_DEVICE);
 503
 504         if (unlikely(dma_mapping_error(aq_nic_get_dev(self), dx_buff->pa)))
 505                 goto exit;
 506
 507         dx_buff->len_pkt = skb->len;
 508         dx_buff->is_sop = 1U;
 509         dx_buff->is_mapped = 1U;
 510         ++ret;
 511
 512         if (skb->ip_summed == CHECKSUM_PARTIAL) {
 513                 dx_buff->is_ip_cso = (htons(ETH_P_IP) == skb->protocol) ?
 514                         1U : 0U;
 515
 516                 if (ip_hdr(skb)->version == 4) {
 517                         dx_buff->is_tcp_cso =
 518                                 (ip_hdr(skb)->protocol == IPPROTO_TCP) ?
 519                                         1U : 0U;
 520                         dx_buff->is_udp_cso =
 521                                 (ip_hdr(skb)->protocol == IPPROTO_UDP) ?
 522                                         1U : 0U;
 523                 } else if (ip_hdr(skb)->version == 6) {
 524                         dx_buff->is_tcp_cso =
 525                                 (ipv6_hdr(skb)->nexthdr == NEXTHDR_TCP) ?
 526                                         1U : 0U;
 527                         dx_buff->is_udp_cso =
 528                                 (ipv6_hdr(skb)->nexthdr == NEXTHDR_UDP) ?
 529                                         1U : 0U;
 530                 }
 531         }
 532
 533         for (; nr_frags--; ++frag_count) {
 534                 unsigned int frag_len = 0U;
 535                 dma_addr_t frag_pa;
 536                 skb_frag_t *frag = &skb_shinfo(skb)->frags[frag_count];
 537
 538                 frag_len = skb_frag_size(frag);
 539                 frag_pa = skb_frag_dma_map(aq_nic_get_dev(self), frag, 0,
 540                                            frag_len, DMA_TO_DEVICE);
 541
 542                 if (unlikely(dma_mapping_error(aq_nic_get_dev(self), frag_pa)))
 543                         goto mapping_error;
 544
 545                 while (frag_len > AQ_CFG_TX_FRAME_MAX) {
 546                         dx = aq_ring_next_dx(ring, dx);
 547                         dx_buff = &ring->buff_ring[dx];
 548
 549                         dx_buff->flags = 0U;
 550                         dx_buff->len = AQ_CFG_TX_FRAME_MAX;
 551                         dx_buff->pa = frag_pa;
 552                         dx_buff->is_mapped = 1U;
 553
 554                         frag_len -= AQ_CFG_TX_FRAME_MAX;
 555                         frag_pa += AQ_CFG_TX_FRAME_MAX;
 556                         ++ret;
 557                 }
 558
 559                 dx = aq_ring_next_dx(ring, dx);
 560                 dx_buff = &ring->buff_ring[dx];
 561
 562                 dx_buff->flags = 0U;
 563                 dx_buff->len = frag_len;
 564                 dx_buff->pa = frag_pa;
 565                 dx_buff->is_mapped = 1U;
 566                 ++ret;
 567         }
 568
 569         dx_buff->is_eop = 1U;
 570         dx_buff->skb = skb;
 571         goto exit;
 572
 573 mapping_error:
 574         for (dx = ring->sw_tail;
 575              ret > 0;
 576              --ret, dx = aq_ring_next_dx(ring, dx)) {
 577                 dx_buff = &ring->buff_ring[dx];
 578
 579                 if (!dx_buff->is_txc && dx_buff->pa) {
 580                         if (unlikely(dx_buff->is_sop)) {
 581                                 dma_unmap_single(aq_nic_get_dev(self),
 582                                                  dx_buff->pa,
 583                                                  dx_buff->len,
 584                                                  DMA_TO_DEVICE);
 585                         } else {
 586                                 dma_unmap_page(aq_nic_get_dev(self),
 587                                                dx_buff->pa,
 588                                                dx_buff->len,
 589                                                DMA_TO_DEVICE);
 590                         }
 591                 }
 592         }
 593
 594 exit:
 595         return ret;
 596 }
 597
 598 int aq_nic_xmit(struct aq_nic_s *self, struct sk_buff *skb)
 599 {
 600         struct aq_ring_s *ring = NULL;
 601         unsigned int frags = 0U;
 602         unsigned int vec = skb->queue_mapping % self->aq_nic_cfg.vecs;
 603         unsigned int tc = 0U;
 604         int err = NETDEV_TX_OK;
 605         bool is_nic_in_bad_state;
 606
 607         frags = skb_shinfo(skb)->nr_frags + 1;
 608
 609         ring = self->aq_ring_tx[AQ_NIC_TCVEC2RING(self, tc, vec)];
 610
 611         if (frags > AQ_CFG_SKB_FRAGS_MAX) {
 612                 dev_kfree_skb_any(skb);
 613                 goto err_exit;
 614         }
 615
 616         is_nic_in_bad_state = aq_utils_obj_test(&self->header.flags,
 617                                                 AQ_NIC_FLAGS_IS_NOT_TX_READY) ||
 618                                                 (aq_ring_avail_dx(ring) <
 619                                                 AQ_CFG_SKB_FRAGS_MAX);
 620
 621         if (is_nic_in_bad_state) {
 622                 aq_nic_ndev_queue_stop(self, ring->idx);
 623                 err = NETDEV_TX_BUSY;
 624                 goto err_exit;
 625         }
 626
 627         frags = aq_nic_map_skb(self, skb, ring);
 628
 629         if (likely(frags)) {
 630                 err = self->aq_hw_ops.hw_ring_tx_xmit(self->aq_hw,
 631                                                       ring,
 632                                                       frags);
 633                 if (err >= 0) {
 634                         if (aq_ring_avail_dx(ring) < AQ_CFG_SKB_FRAGS_MAX + 1)
 635                                 aq_nic_ndev_queue_stop(self, ring->idx);
 636
 637                         ++ring->stats.tx.packets;
 638                         ring->stats.tx.bytes += skb->len;
 639                 }
 640         } else {
 641                 err = NETDEV_TX_BUSY;
 642         }
 643
 644 err_exit:
 645         return err;
 646 }
 647
 648 int aq_nic_set_packet_filter(struct aq_nic_s *self, unsigned int flags)
 649 {
 650         int err = 0;
 651
 652         err = self->aq_hw_ops.hw_packet_filter_set(self->aq_hw, flags);
 653         if (err < 0)
 654                 goto err_exit;
 655
 656         self->packet_filter = flags;
 657
 658 err_exit:
 659         return err;
 660 }
 661
 662 int aq_nic_set_multicast_list(struct aq_nic_s *self, struct net_device *ndev)
 663 {
 664         struct netdev_hw_addr *ha = NULL;
 665         unsigned int i = 0U;
 666
 667         self->mc_list.count = 0U;
 668
 669         netdev_for_each_mc_addr(ha, ndev) {
 670                 ether_addr_copy(self->mc_list.ar[i++], ha->addr);
 671                 ++self->mc_list.count;
 672
 673                 if (i >= AQ_CFG_MULTICAST_ADDRESS_MAX)
 674                         break;
 675         }
 676
 677         if (i >= AQ_CFG_MULTICAST_ADDRESS_MAX) {
 678                 /* Number of filters is too big: atlantic does not support this.
 679                  * Force all multi filter to support this.
 680                  * With this we disable all UC filters and setup "all pass"
 681                  * multicast mask
 682                  */
 683                 self->packet_filter |= IFF_ALLMULTI;
 684                 self->aq_hw->aq_nic_cfg->mc_list_count = 0;
 685                 return self->aq_hw_ops.hw_packet_filter_set(self->aq_hw,
 686                                                         self->packet_filter);
 687         } else {
 688                 return self->aq_hw_ops.hw_multicast_list_set(self->aq_hw,
 689                                                     self->mc_list.ar,
 690                                                     self->mc_list.count);
 691         }
 692 }
 693
 694 int aq_nic_set_mtu(struct aq_nic_s *self, int new_mtu)
 695 {
 696         int err = 0;
 697
 698         if (new_mtu > self->aq_hw_caps.mtu) {
 699                 err = -EINVAL;
 700                 goto err_exit;
 701         }
 702         self->aq_nic_cfg.mtu = new_mtu;
 703
 704 err_exit:
 705         return err;
 706 }
 707
 708 int aq_nic_set_mac(struct aq_nic_s *self, struct net_device *ndev)
 709 {
 710         return self->aq_hw_ops.hw_set_mac_address(self->aq_hw, ndev->dev_addr);
 711 }
 712
 713 unsigned int aq_nic_get_link_speed(struct aq_nic_s *self)
 714 {
 715         return self->link_status.mbps;
 716 }
 717
 718 int aq_nic_get_regs(struct aq_nic_s *self, struct ethtool_regs *regs, void *p)
 719 {
 720         u32 *regs_buff = p;
 721         int err = 0;
 722
 723         regs->version = 1;
 724
 725         err = self->aq_hw_ops.hw_get_regs(self->aq_hw,
 726                                           &self->aq_hw_caps, regs_buff);
 727         if (err < 0)
 728                 goto err_exit;
 729
 730 err_exit:
 731         return err;
 732 }
 733
 734 int aq_nic_get_regs_count(struct aq_nic_s *self)
 735 {
 736         return self->aq_hw_caps.mac_regs_count;
 737 }
 738
 739 void aq_nic_get_stats(struct aq_nic_s *self, u64 *data)
 740 {
 741         struct aq_vec_s *aq_vec = NULL;
 742         unsigned int i = 0U;
 743         unsigned int count = 0U;
 744         int err = 0;
 745
 746         err = self->aq_hw_ops.hw_get_hw_stats(self->aq_hw, data, &count);
 747         if (err < 0)
 748                 goto err_exit;
 749
 750         data += count;
 751         count = 0U;
 752
 753         for (i = 0U, aq_vec = self->aq_vec[0];
 754                 aq_vec && self->aq_vecs > i; ++i, aq_vec = self->aq_vec[i]) {
 755                 data += count;
 756                 aq_vec_get_sw_stats(aq_vec, data, &count);
 757         }
 758
 759 err_exit:;
 760         (void)err;
 761 }
 762
 763 void aq_nic_get_link_ksettings(struct aq_nic_s *self,
 764                                struct ethtool_link_ksettings *cmd)
 765 {
 766         cmd->base.port = PORT_TP;
 767         /* This driver supports only 10G capable adapters, so DUPLEX_FULL */
 768         cmd->base.duplex = DUPLEX_FULL;
 769         cmd->base.autoneg = self->aq_nic_cfg.is_autoneg;
 770
 771         ethtool_link_ksettings_zero_link_mode(cmd, supported);
 772
 773         if (self->aq_hw_caps.link_speed_msk & AQ_NIC_RATE_10G)
 774                 ethtool_link_ksettings_add_link_mode(cmd, supported,
 775                                                      10000baseT_Full);
 776
 777         if (self->aq_hw_caps.link_speed_msk & AQ_NIC_RATE_5G)
 778                 ethtool_link_ksettings_add_link_mode(cmd, supported,
 779                                                      5000baseT_Full);
 780
 781         if (self->aq_hw_caps.link_speed_msk & AQ_NIC_RATE_2GS)
 782                 ethtool_link_ksettings_add_link_mode(cmd, supported,
 783                                                      2500baseT_Full);
 784
 785         if (self->aq_hw_caps.link_speed_msk & AQ_NIC_RATE_1G)
 786                 ethtool_link_ksettings_add_link_mode(cmd, supported,
 787                                                      1000baseT_Full);
 788
 789         if (self->aq_hw_caps.link_speed_msk & AQ_NIC_RATE_100M)
 790                 ethtool_link_ksettings_add_link_mode(cmd, supported,
 791                                                      100baseT_Full);
 792
 793         if (self->aq_hw_caps.flow_control)
 794                 ethtool_link_ksettings_add_link_mode(cmd, supported,
 795                                                      Pause);
 796
 797         ethtool_link_ksettings_add_link_mode(cmd, supported, Autoneg);
 798         ethtool_link_ksettings_add_link_mode(cmd, supported, TP);
 799
 800         ethtool_link_ksettings_zero_link_mode(cmd, advertising);
 801
 802         if (self->aq_nic_cfg.is_autoneg)
 803                 ethtool_link_ksettings_add_link_mode(cmd, advertising, Autoneg);
 804
 805         if (self->aq_nic_cfg.link_speed_msk  & AQ_NIC_RATE_10G)
 806                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
 807                                                      10000baseT_Full);
 808
 809         if (self->aq_nic_cfg.link_speed_msk  & AQ_NIC_RATE_5G)
 810                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
 811                                                      5000baseT_Full);
 812
 813         if (self->aq_nic_cfg.link_speed_msk  & AQ_NIC_RATE_2GS)
 814                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
 815                                                      2500baseT_Full);
 816
 817         if (self->aq_nic_cfg.link_speed_msk  & AQ_NIC_RATE_1G)
 818                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
 819                                                      1000baseT_Full);
 820
 821         if (self->aq_nic_cfg.link_speed_msk  & AQ_NIC_RATE_100M)
 822                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
 823                                                      100baseT_Full);
 824
 825         if (self->aq_nic_cfg.flow_control)
 826                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
 827                                                      Pause);
 828
 829         ethtool_link_ksettings_add_link_mode(cmd, advertising, TP);
 830 }
 831
 832 int aq_nic_set_link_ksettings(struct aq_nic_s *self,
 833                               const struct ethtool_link_ksettings *cmd)
 834 {
 835         u32 speed = 0U;
 836         u32 rate = 0U;
 837         int err = 0;
 838
 839         if (cmd->base.autoneg == AUTONEG_ENABLE) {
 840                 rate = self->aq_hw_caps.link_speed_msk;
 841                 self->aq_nic_cfg.is_autoneg = true;
 842         } else {
 843                 speed = cmd->base.speed;
 844
 845                 switch (speed) {
 846                 case SPEED_100:
 847                         rate = AQ_NIC_RATE_100M;
 848                         break;
 849
 850                 case SPEED_1000:
 851                         rate = AQ_NIC_RATE_1G;
 852                         break;
 853
 854                 case SPEED_2500:
 855                         rate = AQ_NIC_RATE_2GS;
 856                         break;
 857
 858                 case SPEED_5000:
 859                         rate = AQ_NIC_RATE_5G;
 860                         break;
 861
 862                 case SPEED_10000:
 863                         rate = AQ_NIC_RATE_10G;
 864                         break;
 865
 866                 default:
 867                         err = -1;
 868                         goto err_exit;
 869                 break;
 870                 }
 871                 if (!(self->aq_hw_caps.link_speed_msk & rate)) {
 872                         err = -1;
 873                         goto err_exit;
 874                 }
 875
 876                 self->aq_nic_cfg.is_autoneg = false;
 877         }
 878
 879         err = self->aq_hw_ops.hw_set_link_speed(self->aq_hw, rate);
 880         if (err < 0)
 881                 goto err_exit;
 882
 883         self->aq_nic_cfg.link_speed_msk = rate;
 884
 885 err_exit:
 886         return err;
 887 }
 888
 889 struct aq_nic_cfg_s *aq_nic_get_cfg(struct aq_nic_s *self)
 890 {
 891         return &self->aq_nic_cfg;
 892 }
 893
 894 u32 aq_nic_get_fw_version(struct aq_nic_s *self)
 895 {
 896         u32 fw_version = 0U;
 897
 898         self->aq_hw_ops.hw_get_fw_version(self->aq_hw, &fw_version);
 899
 900         return fw_version;
 901 }
 902
 903 int aq_nic_stop(struct aq_nic_s *self)
 904 {
 905         struct aq_vec_s *aq_vec = NULL;
 906         unsigned int i = 0U;
 907
 908         for (i = 0U, aq_vec = self->aq_vec[0];
 909                 self->aq_vecs > i; ++i, aq_vec = self->aq_vec[i])
 910                 aq_nic_ndev_queue_stop(self, i);
 911
 912         del_timer_sync(&self->service_timer);
 913
 914         self->aq_hw_ops.hw_irq_disable(self->aq_hw, AQ_CFG_IRQ_MASK);
 915
 916         if (self->aq_nic_cfg.is_polling)
 917                 del_timer_sync(&self->polling_timer);
 918         else
 919                 aq_pci_func_free_irqs(self->aq_pci_func);
 920
 921         for (i = 0U, aq_vec = self->aq_vec[0];
 922                 self->aq_vecs > i; ++i, aq_vec = self->aq_vec[i])
 923                 aq_vec_stop(aq_vec);
 924
 925         return self->aq_hw_ops.hw_stop(self->aq_hw);
 926 }
 927
 928 void aq_nic_deinit(struct aq_nic_s *self)
 929 {
 930         struct aq_vec_s *aq_vec = NULL;
 931         unsigned int i = 0U;
 932
 933         if (!self)
 934                 goto err_exit;
 935
 936         for (i = 0U, aq_vec = self->aq_vec[0];
 937                 self->aq_vecs > i; ++i, aq_vec = self->aq_vec[i])
 938                 aq_vec_deinit(aq_vec);
 939
 940         if (self->power_state == AQ_HW_POWER_STATE_D0) {
 941                 (void)self->aq_hw_ops.hw_deinit(self->aq_hw);
 942         } else {
 943                 (void)self->aq_hw_ops.hw_set_power(self->aq_hw,
 944                                                    self->power_state);
 945         }
 946
 947 err_exit:;
 948 }
 949
 950 void aq_nic_free_hot_resources(struct aq_nic_s *self)
 951 {
 952         unsigned int i = 0U;
 953
 954         if (!self)
 955                 goto err_exit;
 956
 957         for (i = AQ_DIMOF(self->aq_vec); i--;) {
 958                 if (self->aq_vec[i]) {
 959                         aq_vec_free(self->aq_vec[i]);
 960                         self->aq_vec[i] = NULL;
 961                 }
 962         }
 963
 964 err_exit:;
 965 }
 966
 967 int aq_nic_change_pm_state(struct aq_nic_s *self, pm_message_t *pm_msg)
 968 {
 969         int err = 0;
 970
 971         if (!netif_running(self->ndev)) {
 972                 err = 0;
 973                 goto out;
 974         }
 975         rtnl_lock();
 976         if (pm_msg->event & PM_EVENT_SLEEP || pm_msg->event & PM_EVENT_FREEZE) {
 977                 self->power_state = AQ_HW_POWER_STATE_D3;
 978                 netif_device_detach(self->ndev);
 979                 netif_tx_stop_all_queues(self->ndev);
 980
 981                 err = aq_nic_stop(self);
 982                 if (err < 0)
 983                         goto err_exit;
 984
 985                 aq_nic_deinit(self);
 986         } else {
 987                 err = aq_nic_init(self);
 988                 if (err < 0)
 989                         goto err_exit;
 990
 991                 err = aq_nic_start(self);
 992                 if (err < 0)
 993                         goto err_exit;
 994
 995                 netif_device_attach(self->ndev);
 996                 netif_tx_start_all_queues(self->ndev);
 997         }
 998
 999 err_exit:
1000         rtnl_unlock();
1001 out:
1002         return err;
1003 }