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->irq_type = aq_pci_func_get_irq_type(self->aq_pci_func);
 107
 108         if ((cfg->irq_type == AQ_HW_IRQ_LEGACY) ||
 109             (self->aq_hw_caps.vecs == 1U) ||
 110             (cfg->vecs == 1U)) {
 111                 cfg->is_rss = 0U;
 112                 cfg->vecs = 1U;
 113         }
 114
 115         cfg->link_speed_msk &= self->aq_hw_caps.link_speed_msk;
 116         cfg->hw_features = self->aq_hw_caps.hw_features;
 117         return 0;
 118 }
 119
 120 static void aq_nic_service_timer_cb(unsigned long param)
 121 {
 122         struct aq_nic_s *self = (struct aq_nic_s *)param;
 123         struct net_device *ndev = aq_nic_get_ndev(self);
 124         int err = 0;
 125         unsigned int i = 0U;
 126         struct aq_hw_link_status_s link_status;
 127         struct aq_ring_stats_rx_s stats_rx;
 128         struct aq_ring_stats_tx_s stats_tx;
 129
 130         if (aq_utils_obj_test(&self->header.flags, AQ_NIC_FLAGS_IS_NOT_READY))
 131                 goto err_exit;
 132
 133         err = self->aq_hw_ops.hw_get_link_status(self->aq_hw, &link_status);
 134         if (err < 0)
 135                 goto err_exit;
 136
 137         self->aq_hw_ops.hw_interrupt_moderation_set(self->aq_hw,
 138                             self->aq_nic_cfg.is_interrupt_moderation);
 139
 140         if (memcmp(&link_status, &self->link_status, sizeof(link_status))) {
 141                 if (link_status.mbps) {
 142                         aq_utils_obj_set(&self->header.flags,
 143                                          AQ_NIC_FLAG_STARTED);
 144                         aq_utils_obj_clear(&self->header.flags,
 145                                            AQ_NIC_LINK_DOWN);
 146                         netif_carrier_on(self->ndev);
 147                 } else {
 148                         netif_carrier_off(self->ndev);
 149                         aq_utils_obj_set(&self->header.flags, AQ_NIC_LINK_DOWN);
 150                 }
 151
 152                 self->link_status = link_status;
 153         }
 154
 155         memset(&stats_rx, 0U, sizeof(struct aq_ring_stats_rx_s));
 156         memset(&stats_tx, 0U, sizeof(struct aq_ring_stats_tx_s));
 157         for (i = AQ_DIMOF(self->aq_vec); i--;) {
 158                 if (self->aq_vec[i])
 159                         aq_vec_add_stats(self->aq_vec[i], &stats_rx, &stats_tx);
 160         }
 161
 162         ndev->stats.rx_packets = stats_rx.packets;
 163         ndev->stats.rx_bytes = stats_rx.bytes;
 164         ndev->stats.rx_errors = stats_rx.errors;
 165         ndev->stats.tx_packets = stats_tx.packets;
 166         ndev->stats.tx_bytes = stats_tx.bytes;
 167         ndev->stats.tx_errors = stats_tx.errors;
 168
 169 err_exit:
 170         mod_timer(&self->service_timer,
 171                   jiffies + AQ_CFG_SERVICE_TIMER_INTERVAL);
 172 }
 173
 174 static void aq_nic_polling_timer_cb(unsigned long param)
 175 {
 176         struct aq_nic_s *self = (struct aq_nic_s *)param;
 177         struct aq_vec_s *aq_vec = NULL;
 178         unsigned int i = 0U;
 179
 180         for (i = 0U, aq_vec = self->aq_vec[0];
 181                 self->aq_vecs > i; ++i, aq_vec = self->aq_vec[i])
 182                 aq_vec_isr(i, (void *)aq_vec);
 183
 184         mod_timer(&self->polling_timer, jiffies +
 185                 AQ_CFG_POLLING_TIMER_INTERVAL);
 186 }
 187
 188 static struct net_device *aq_nic_ndev_alloc(void)
 189 {
 190         return alloc_etherdev_mq(sizeof(struct aq_nic_s), AQ_CFG_VECS_MAX);
 191 }
 192
 193 struct aq_nic_s *aq_nic_alloc_cold(const struct net_device_ops *ndev_ops,
 194                                    const struct ethtool_ops *et_ops,
 195                                    struct device *dev,
 196                                    struct aq_pci_func_s *aq_pci_func,
 197                                    unsigned int port,
 198                                    const struct aq_hw_ops *aq_hw_ops)
 199 {
 200         struct net_device *ndev = NULL;
 201         struct aq_nic_s *self = NULL;
 202         int err = 0;
 203
 204         ndev = aq_nic_ndev_alloc();
 205         if (!ndev) {
 206                 err = -ENOMEM;
 207                 goto err_exit;
 208         }
 209
 210         self = netdev_priv(ndev);
 211
 212         ndev->netdev_ops = ndev_ops;
 213         ndev->ethtool_ops = et_ops;
 214
 215         SET_NETDEV_DEV(ndev, dev);
 216
 217         ndev->if_port = port;
 218         ndev->min_mtu = ETH_MIN_MTU;
 219         self->ndev = ndev;
 220
 221         self->aq_pci_func = aq_pci_func;
 222
 223         self->aq_hw_ops = *aq_hw_ops;
 224         self->port = (u8)port;
 225
 226         self->aq_hw = self->aq_hw_ops.create(aq_pci_func, self->port,
 227                                                 &self->aq_hw_ops);
 228         err = self->aq_hw_ops.get_hw_caps(self->aq_hw, &self->aq_hw_caps);
 229         if (err < 0)
 230                 goto err_exit;
 231
 232         aq_nic_cfg_init_defaults(self);
 233
 234 err_exit:
 235         if (err < 0) {
 236                 aq_nic_free_hot_resources(self);
 237                 self = NULL;
 238         }
 239         return self;
 240 }
 241
 242 int aq_nic_ndev_register(struct aq_nic_s *self)
 243 {
 244         int err = 0;
 245         unsigned int i = 0U;
 246
 247         if (!self->ndev) {
 248                 err = -EINVAL;
 249                 goto err_exit;
 250         }
 251         err = self->aq_hw_ops.hw_get_mac_permanent(self->aq_hw,
 252                             self->aq_nic_cfg.aq_hw_caps,
 253                             self->ndev->dev_addr);
 254         if (err < 0)
 255                 goto err_exit;
 256
 257 #if defined(AQ_CFG_MAC_ADDR_PERMANENT)
 258         {
 259                 static u8 mac_addr_permanent[] = AQ_CFG_MAC_ADDR_PERMANENT;
 260
 261                 ether_addr_copy(self->ndev->dev_addr, mac_addr_permanent);
 262         }
 263 #endif
 264
 265         netif_carrier_off(self->ndev);
 266
 267         for (i = AQ_CFG_VECS_MAX; i--;)
 268                 aq_nic_ndev_queue_stop(self, i);
 269
 270         err = register_netdev(self->ndev);
 271         if (err < 0)
 272                 goto err_exit;
 273
 274 err_exit:
 275         return err;
 276 }
 277
 278 int aq_nic_ndev_init(struct aq_nic_s *self)
 279 {
 280         struct aq_hw_caps_s *aq_hw_caps = self->aq_nic_cfg.aq_hw_caps;
 281         struct aq_nic_cfg_s *aq_nic_cfg = &self->aq_nic_cfg;
 282
 283         self->ndev->hw_features |= aq_hw_caps->hw_features;
 284         self->ndev->features = aq_hw_caps->hw_features;
 285         self->ndev->priv_flags = aq_hw_caps->hw_priv_flags;
 286         self->ndev->mtu = aq_nic_cfg->mtu - ETH_HLEN;
 287
 288         return 0;
 289 }
 290
 291 void aq_nic_ndev_free(struct aq_nic_s *self)
 292 {
 293         if (!self->ndev)
 294                 goto err_exit;
 295
 296         if (self->ndev->reg_state == NETREG_REGISTERED)
 297                 unregister_netdev(self->ndev);
 298
 299         if (self->aq_hw)
 300                 self->aq_hw_ops.destroy(self->aq_hw);
 301
 302         free_netdev(self->ndev);
 303
 304 err_exit:;
 305 }
 306
 307 struct aq_nic_s *aq_nic_alloc_hot(struct net_device *ndev)
 308 {
 309         struct aq_nic_s *self = NULL;
 310         int err = 0;
 311
 312         if (!ndev) {
 313                 err = -EINVAL;
 314                 goto err_exit;
 315         }
 316         self = netdev_priv(ndev);
 317
 318         if (!self) {
 319                 err = -EINVAL;
 320                 goto err_exit;
 321         }
 322         if (netif_running(ndev)) {
 323                 unsigned int i;
 324
 325                 for (i = AQ_CFG_VECS_MAX; i--;)
 326                         netif_stop_subqueue(ndev, i);
 327         }
 328
 329         for (self->aq_vecs = 0; self->aq_vecs < self->aq_nic_cfg.vecs;
 330                 self->aq_vecs++) {
 331                 self->aq_vec[self->aq_vecs] =
 332                     aq_vec_alloc(self, self->aq_vecs, &self->aq_nic_cfg);
 333                 if (!self->aq_vec[self->aq_vecs]) {
 334                         err = -ENOMEM;
 335                         goto err_exit;
 336                 }
 337         }
 338
 339 err_exit:
 340         if (err < 0) {
 341                 aq_nic_free_hot_resources(self);
 342                 self = NULL;
 343         }
 344         return self;
 345 }
 346
 347 void aq_nic_set_tx_ring(struct aq_nic_s *self, unsigned int idx,
 348                         struct aq_ring_s *ring)
 349 {
 350         self->aq_ring_tx[idx] = ring;
 351 }
 352
 353 struct device *aq_nic_get_dev(struct aq_nic_s *self)
 354 {
 355         return self->ndev->dev.parent;
 356 }
 357
 358 struct net_device *aq_nic_get_ndev(struct aq_nic_s *self)
 359 {
 360         return self->ndev;
 361 }
 362
 363 int aq_nic_init(struct aq_nic_s *self)
 364 {
 365         struct aq_vec_s *aq_vec = NULL;
 366         int err = 0;
 367         unsigned int i = 0U;
 368
 369         self->power_state = AQ_HW_POWER_STATE_D0;
 370         err = self->aq_hw_ops.hw_reset(self->aq_hw);
 371         if (err < 0)
 372                 goto err_exit;
 373
 374         err = self->aq_hw_ops.hw_init(self->aq_hw, &self->aq_nic_cfg,
 375                             aq_nic_get_ndev(self)->dev_addr);
 376         if (err < 0)
 377                 goto err_exit;
 378
 379         for (i = 0U, aq_vec = self->aq_vec[0];
 380                 self->aq_vecs > i; ++i, aq_vec = self->aq_vec[i])
 381                 aq_vec_init(aq_vec, &self->aq_hw_ops, self->aq_hw);
 382
 383 err_exit:
 384         return err;
 385 }
 386
 387 void aq_nic_ndev_queue_start(struct aq_nic_s *self, unsigned int idx)
 388 {
 389         netif_start_subqueue(self->ndev, idx);
 390 }
 391
 392 void aq_nic_ndev_queue_stop(struct aq_nic_s *self, unsigned int idx)
 393 {
 394         netif_stop_subqueue(self->ndev, idx);
 395 }
 396
 397 int aq_nic_start(struct aq_nic_s *self)
 398 {
 399         struct aq_vec_s *aq_vec = NULL;
 400         int err = 0;
 401         unsigned int i = 0U;
 402
 403         err = self->aq_hw_ops.hw_multicast_list_set(self->aq_hw,
 404                                                     self->mc_list.ar,
 405                                                     self->mc_list.count);
 406         if (err < 0)
 407                 goto err_exit;
 408
 409         err = self->aq_hw_ops.hw_packet_filter_set(self->aq_hw,
 410                                                    self->packet_filter);
 411         if (err < 0)
 412                 goto err_exit;
 413
 414         for (i = 0U, aq_vec = self->aq_vec[0];
 415                 self->aq_vecs > i; ++i, aq_vec = self->aq_vec[i]) {
 416                 err = aq_vec_start(aq_vec);
 417                 if (err < 0)
 418                         goto err_exit;
 419         }
 420
 421         err = self->aq_hw_ops.hw_start(self->aq_hw);
 422         if (err < 0)
 423                 goto err_exit;
 424
 425         err = self->aq_hw_ops.hw_interrupt_moderation_set(self->aq_hw,
 426                             self->aq_nic_cfg.is_interrupt_moderation);
 427         if (err < 0)
 428                 goto err_exit;
 429         setup_timer(&self->service_timer, &aq_nic_service_timer_cb,
 430                     (unsigned long)self);
 431         mod_timer(&self->service_timer, jiffies +
 432                         AQ_CFG_SERVICE_TIMER_INTERVAL);
 433
 434         if (self->aq_nic_cfg.is_polling) {
 435                 setup_timer(&self->polling_timer, &aq_nic_polling_timer_cb,
 436                             (unsigned long)self);
 437                 mod_timer(&self->polling_timer, jiffies +
 438                           AQ_CFG_POLLING_TIMER_INTERVAL);
 439         } else {
 440                 for (i = 0U, aq_vec = self->aq_vec[0];
 441                         self->aq_vecs > i; ++i, aq_vec = self->aq_vec[i]) {
 442                         err = aq_pci_func_alloc_irq(self->aq_pci_func, i,
 443                                                     self->ndev->name, aq_vec,
 444                                         aq_vec_get_affinity_mask(aq_vec));
 445                         if (err < 0)
 446                                 goto err_exit;
 447                 }
 448
 449                 err = self->aq_hw_ops.hw_irq_enable(self->aq_hw,
 450                                     AQ_CFG_IRQ_MASK);
 451                 if (err < 0)
 452                         goto err_exit;
 453         }
 454
 455         for (i = 0U, aq_vec = self->aq_vec[0];
 456                 self->aq_vecs > i; ++i, aq_vec = self->aq_vec[i])
 457                 aq_nic_ndev_queue_start(self, i);
 458
 459         err = netif_set_real_num_tx_queues(self->ndev, self->aq_vecs);
 460         if (err < 0)
 461                 goto err_exit;
 462
 463         err = netif_set_real_num_rx_queues(self->ndev, self->aq_vecs);
 464         if (err < 0)
 465                 goto err_exit;
 466
 467 err_exit:
 468         return err;
 469 }
 470
 471 static unsigned int aq_nic_map_skb(struct aq_nic_s *self,
 472                                    struct sk_buff *skb,
 473                                    struct aq_ring_s *ring)
 474 {
 475         unsigned int ret = 0U;
 476         unsigned int nr_frags = skb_shinfo(skb)->nr_frags;
 477         unsigned int frag_count = 0U;
 478         unsigned int dx = ring->sw_tail;
 479         struct aq_ring_buff_s *dx_buff = &ring->buff_ring[dx];
 480
 481         if (unlikely(skb_is_gso(skb))) {
 482                 dx_buff->flags = 0U;
 483                 dx_buff->len_pkt = skb->len;
 484                 dx_buff->len_l2 = ETH_HLEN;
 485                 dx_buff->len_l3 = ip_hdrlen(skb);
 486                 dx_buff->len_l4 = tcp_hdrlen(skb);
 487                 dx_buff->mss = skb_shinfo(skb)->gso_size;
 488                 dx_buff->is_txc = 1U;
 489
 490                 dx_buff->is_ipv6 =
 491                         (ip_hdr(skb)->version == 6) ? 1U : 0U;
 492
 493                 dx = aq_ring_next_dx(ring, dx);
 494                 dx_buff = &ring->buff_ring[dx];
 495                 ++ret;
 496         }
 497
 498         dx_buff->flags = 0U;
 499         dx_buff->len = skb_headlen(skb);
 500         dx_buff->pa = dma_map_single(aq_nic_get_dev(self),
 501                                      skb->data,
 502                                      dx_buff->len,
 503                                      DMA_TO_DEVICE);
 504
 505         if (unlikely(dma_mapping_error(aq_nic_get_dev(self), dx_buff->pa)))
 506                 goto exit;
 507
 508         dx_buff->len_pkt = skb->len;
 509         dx_buff->is_sop = 1U;
 510         dx_buff->is_mapped = 1U;
 511         ++ret;
 512
 513         if (skb->ip_summed == CHECKSUM_PARTIAL) {
 514                 dx_buff->is_ip_cso = (htons(ETH_P_IP) == skb->protocol) ?
 515                         1U : 0U;
 516
 517                 if (ip_hdr(skb)->version == 4) {
 518                         dx_buff->is_tcp_cso =
 519                                 (ip_hdr(skb)->protocol == IPPROTO_TCP) ?
 520                                         1U : 0U;
 521                         dx_buff->is_udp_cso =
 522                                 (ip_hdr(skb)->protocol == IPPROTO_UDP) ?
 523                                         1U : 0U;
 524                 } else if (ip_hdr(skb)->version == 6) {
 525                         dx_buff->is_tcp_cso =
 526                                 (ipv6_hdr(skb)->nexthdr == NEXTHDR_TCP) ?
 527                                         1U : 0U;
 528                         dx_buff->is_udp_cso =
 529                                 (ipv6_hdr(skb)->nexthdr == NEXTHDR_UDP) ?
 530                                         1U : 0U;
 531                 }
 532         }
 533
 534         for (; nr_frags--; ++frag_count) {
 535                 unsigned int frag_len = 0U;
 536                 dma_addr_t frag_pa;
 537                 skb_frag_t *frag = &skb_shinfo(skb)->frags[frag_count];
 538
 539                 frag_len = skb_frag_size(frag);
 540                 frag_pa = skb_frag_dma_map(aq_nic_get_dev(self), frag, 0,
 541                                            frag_len, DMA_TO_DEVICE);
 542
 543                 if (unlikely(dma_mapping_error(aq_nic_get_dev(self), frag_pa)))
 544                         goto mapping_error;
 545
 546                 while (frag_len > AQ_CFG_TX_FRAME_MAX) {
 547                         dx = aq_ring_next_dx(ring, dx);
 548                         dx_buff = &ring->buff_ring[dx];
 549
 550                         dx_buff->flags = 0U;
 551                         dx_buff->len = AQ_CFG_TX_FRAME_MAX;
 552                         dx_buff->pa = frag_pa;
 553                         dx_buff->is_mapped = 1U;
 554
 555                         frag_len -= AQ_CFG_TX_FRAME_MAX;
 556                         frag_pa += AQ_CFG_TX_FRAME_MAX;
 557                         ++ret;
 558                 }
 559
 560                 dx = aq_ring_next_dx(ring, dx);
 561                 dx_buff = &ring->buff_ring[dx];
 562
 563                 dx_buff->flags = 0U;
 564                 dx_buff->len = frag_len;
 565                 dx_buff->pa = frag_pa;
 566                 dx_buff->is_mapped = 1U;
 567                 ++ret;
 568         }
 569
 570         dx_buff->is_eop = 1U;
 571         dx_buff->skb = skb;
 572         goto exit;
 573
 574 mapping_error:
 575         for (dx = ring->sw_tail;
 576              ret > 0;
 577              --ret, dx = aq_ring_next_dx(ring, dx)) {
 578                 dx_buff = &ring->buff_ring[dx];
 579
 580                 if (!dx_buff->is_txc && dx_buff->pa) {
 581                         if (unlikely(dx_buff->is_sop)) {
 582                                 dma_unmap_single(aq_nic_get_dev(self),
 583                                                  dx_buff->pa,
 584                                                  dx_buff->len,
 585                                                  DMA_TO_DEVICE);
 586                         } else {
 587                                 dma_unmap_page(aq_nic_get_dev(self),
 588                                                dx_buff->pa,
 589                                                dx_buff->len,
 590                                                DMA_TO_DEVICE);
 591                         }
 592                 }
 593         }
 594
 595 exit:
 596         return ret;
 597 }
 598
 599 int aq_nic_xmit(struct aq_nic_s *self, struct sk_buff *skb)
 600 __releases(&ring->lock)
 601 __acquires(&ring->lock)
 602 {
 603         struct aq_ring_s *ring = NULL;
 604         unsigned int frags = 0U;
 605         unsigned int vec = skb->queue_mapping % self->aq_nic_cfg.vecs;
 606         unsigned int tc = 0U;
 607         unsigned int trys = AQ_CFG_LOCK_TRYS;
 608         int err = NETDEV_TX_OK;
 609         bool is_nic_in_bad_state;
 610
 611         frags = skb_shinfo(skb)->nr_frags + 1;
 612
 613         ring = self->aq_ring_tx[AQ_NIC_TCVEC2RING(self, tc, vec)];
 614
 615         if (frags > AQ_CFG_SKB_FRAGS_MAX) {
 616                 dev_kfree_skb_any(skb);
 617                 goto err_exit;
 618         }
 619
 620         is_nic_in_bad_state = aq_utils_obj_test(&self->header.flags,
 621                                                 AQ_NIC_FLAGS_IS_NOT_TX_READY) ||
 622                                                 (aq_ring_avail_dx(ring) <
 623                                                 AQ_CFG_SKB_FRAGS_MAX);
 624
 625         if (is_nic_in_bad_state) {
 626                 aq_nic_ndev_queue_stop(self, ring->idx);
 627                 err = NETDEV_TX_BUSY;
 628                 goto err_exit;
 629         }
 630
 631         do {
 632                 if (spin_trylock(&ring->header.lock)) {
 633                         frags = aq_nic_map_skb(self, skb, ring);
 634
 635                         if (likely(frags)) {
 636                                 err = self->aq_hw_ops.hw_ring_tx_xmit(
 637                                                                 self->aq_hw,
 638                                                                 ring, frags);
 639                                 if (err >= 0) {
 640                                         if (aq_ring_avail_dx(ring) <
 641                                             AQ_CFG_SKB_FRAGS_MAX + 1)
 642                                                 aq_nic_ndev_queue_stop(
 643                                                                 self,
 644                                                                 ring->idx);
 645
 646                                         ++ring->stats.tx.packets;
 647                                         ring->stats.tx.bytes += skb->len;
 648                                 }
 649                         } else {
 650                                 err = NETDEV_TX_BUSY;
 651                         }
 652
 653                         spin_unlock(&ring->header.lock);
 654                         break;
 655                 }
 656         } while (--trys);
 657
 658         if (!trys) {
 659                 err = NETDEV_TX_BUSY;
 660                 goto err_exit;
 661         }
 662
 663 err_exit:
 664         return err;
 665 }
 666
 667 int aq_nic_set_packet_filter(struct aq_nic_s *self, unsigned int flags)
 668 {
 669         int err = 0;
 670
 671         err = self->aq_hw_ops.hw_packet_filter_set(self->aq_hw, flags);
 672         if (err < 0)
 673                 goto err_exit;
 674
 675         self->packet_filter = flags;
 676
 677 err_exit:
 678         return err;
 679 }
 680
 681 int aq_nic_set_multicast_list(struct aq_nic_s *self, struct net_device *ndev)
 682 {
 683         struct netdev_hw_addr *ha = NULL;
 684         unsigned int i = 0U;
 685
 686         self->mc_list.count = 0U;
 687
 688         netdev_for_each_mc_addr(ha, ndev) {
 689                 ether_addr_copy(self->mc_list.ar[i++], ha->addr);
 690                 ++self->mc_list.count;
 691         }
 692
 693         return self->aq_hw_ops.hw_multicast_list_set(self->aq_hw,
 694                                                     self->mc_list.ar,
 695                                                     self->mc_list.count);
 696 }
 697
 698 int aq_nic_set_mtu(struct aq_nic_s *self, int new_mtu)
 699 {
 700         int err = 0;
 701
 702         if (new_mtu > self->aq_hw_caps.mtu) {
 703                 err = -EINVAL;
 704                 goto err_exit;
 705         }
 706         self->aq_nic_cfg.mtu = new_mtu;
 707
 708 err_exit:
 709         return err;
 710 }
 711
 712 int aq_nic_set_mac(struct aq_nic_s *self, struct net_device *ndev)
 713 {
 714         return self->aq_hw_ops.hw_set_mac_address(self->aq_hw, ndev->dev_addr);
 715 }
 716
 717 unsigned int aq_nic_get_link_speed(struct aq_nic_s *self)
 718 {
 719         return self->link_status.mbps;
 720 }
 721
 722 int aq_nic_get_regs(struct aq_nic_s *self, struct ethtool_regs *regs, void *p)
 723 {
 724         u32 *regs_buff = p;
 725         int err = 0;
 726
 727         regs->version = 1;
 728
 729         err = self->aq_hw_ops.hw_get_regs(self->aq_hw,
 730                                           &self->aq_hw_caps, regs_buff);
 731         if (err < 0)
 732                 goto err_exit;
 733
 734 err_exit:
 735         return err;
 736 }
 737
 738 int aq_nic_get_regs_count(struct aq_nic_s *self)
 739 {
 740         return self->aq_hw_caps.mac_regs_count;
 741 }
 742
 743 void aq_nic_get_stats(struct aq_nic_s *self, u64 *data)
 744 {
 745         struct aq_vec_s *aq_vec = NULL;
 746         unsigned int i = 0U;
 747         unsigned int count = 0U;
 748         int err = 0;
 749
 750         err = self->aq_hw_ops.hw_get_hw_stats(self->aq_hw, data, &count);
 751         if (err < 0)
 752                 goto err_exit;
 753
 754         data += count;
 755         count = 0U;
 756
 757         for (i = 0U, aq_vec = self->aq_vec[0];
 758                 aq_vec && self->aq_vecs > i; ++i, aq_vec = self->aq_vec[i]) {
 759                 data += count;
 760                 aq_vec_get_sw_stats(aq_vec, data, &count);
 761         }
 762
 763 err_exit:;
 764         (void)err;
 765 }
 766
 767 void aq_nic_get_link_ksettings(struct aq_nic_s *self,
 768                                struct ethtool_link_ksettings *cmd)
 769 {
 770         cmd->base.port = PORT_TP;
 771         /* This driver supports only 10G capable adapters, so DUPLEX_FULL */
 772         cmd->base.duplex = DUPLEX_FULL;
 773         cmd->base.autoneg = self->aq_nic_cfg.is_autoneg;
 774
 775         ethtool_link_ksettings_zero_link_mode(cmd, supported);
 776
 777         if (self->aq_hw_caps.link_speed_msk & AQ_NIC_RATE_10G)
 778                 ethtool_link_ksettings_add_link_mode(cmd, supported,
 779                                                      10000baseT_Full);
 780
 781         if (self->aq_hw_caps.link_speed_msk & AQ_NIC_RATE_5G)
 782                 ethtool_link_ksettings_add_link_mode(cmd, supported,
 783                                                      5000baseT_Full);
 784
 785         if (self->aq_hw_caps.link_speed_msk & AQ_NIC_RATE_2GS)
 786                 ethtool_link_ksettings_add_link_mode(cmd, supported,
 787                                                      2500baseT_Full);
 788
 789         if (self->aq_hw_caps.link_speed_msk & AQ_NIC_RATE_1G)
 790                 ethtool_link_ksettings_add_link_mode(cmd, supported,
 791                                                      1000baseT_Full);
 792
 793         if (self->aq_hw_caps.link_speed_msk & AQ_NIC_RATE_100M)
 794                 ethtool_link_ksettings_add_link_mode(cmd, supported,
 795                                                      100baseT_Full);
 796
 797         if (self->aq_hw_caps.flow_control)
 798                 ethtool_link_ksettings_add_link_mode(cmd, supported,
 799                                                      Pause);
 800
 801         ethtool_link_ksettings_add_link_mode(cmd, supported, Autoneg);
 802         ethtool_link_ksettings_add_link_mode(cmd, supported, TP);
 803
 804         ethtool_link_ksettings_zero_link_mode(cmd, advertising);
 805
 806         if (self->aq_nic_cfg.is_autoneg)
 807                 ethtool_link_ksettings_add_link_mode(cmd, advertising, Autoneg);
 808
 809         if (self->aq_nic_cfg.link_speed_msk  & AQ_NIC_RATE_10G)
 810                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
 811                                                      10000baseT_Full);
 812
 813         if (self->aq_nic_cfg.link_speed_msk  & AQ_NIC_RATE_5G)
 814                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
 815                                                      5000baseT_Full);
 816
 817         if (self->aq_nic_cfg.link_speed_msk  & AQ_NIC_RATE_2GS)
 818                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
 819                                                      2500baseT_Full);
 820
 821         if (self->aq_nic_cfg.link_speed_msk  & AQ_NIC_RATE_1G)
 822                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
 823                                                      1000baseT_Full);
 824
 825         if (self->aq_nic_cfg.link_speed_msk  & AQ_NIC_RATE_100M)
 826                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
 827                                                      100baseT_Full);
 828
 829         if (self->aq_nic_cfg.flow_control)
 830                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
 831                                                      Pause);
 832
 833         ethtool_link_ksettings_add_link_mode(cmd, advertising, TP);
 834 }
 835
 836 int aq_nic_set_link_ksettings(struct aq_nic_s *self,
 837                               const struct ethtool_link_ksettings *cmd)
 838 {
 839         u32 speed = 0U;
 840         u32 rate = 0U;
 841         int err = 0;
 842
 843         if (cmd->base.autoneg == AUTONEG_ENABLE) {
 844                 rate = self->aq_hw_caps.link_speed_msk;
 845                 self->aq_nic_cfg.is_autoneg = true;
 846         } else {
 847                 speed = cmd->base.speed;
 848
 849                 switch (speed) {
 850                 case SPEED_100:
 851                         rate = AQ_NIC_RATE_100M;
 852                         break;
 853
 854                 case SPEED_1000:
 855                         rate = AQ_NIC_RATE_1G;
 856                         break;
 857
 858                 case SPEED_2500:
 859                         rate = AQ_NIC_RATE_2GS;
 860                         break;
 861
 862                 case SPEED_5000:
 863                         rate = AQ_NIC_RATE_5G;
 864                         break;
 865
 866                 case SPEED_10000:
 867                         rate = AQ_NIC_RATE_10G;
 868                         break;
 869
 870                 default:
 871                         err = -1;
 872                         goto err_exit;
 873                 break;
 874                 }
 875                 if (!(self->aq_hw_caps.link_speed_msk & rate)) {
 876                         err = -1;
 877                         goto err_exit;
 878                 }
 879
 880                 self->aq_nic_cfg.is_autoneg = false;
 881         }
 882
 883         err = self->aq_hw_ops.hw_set_link_speed(self->aq_hw, rate);
 884         if (err < 0)
 885                 goto err_exit;
 886
 887         self->aq_nic_cfg.link_speed_msk = rate;
 888
 889 err_exit:
 890         return err;
 891 }
 892
 893 struct aq_nic_cfg_s *aq_nic_get_cfg(struct aq_nic_s *self)
 894 {
 895         return &self->aq_nic_cfg;
 896 }
 897
 898 u32 aq_nic_get_fw_version(struct aq_nic_s *self)
 899 {
 900         u32 fw_version = 0U;
 901
 902         self->aq_hw_ops.hw_get_fw_version(self->aq_hw, &fw_version);
 903
 904         return fw_version;
 905 }
 906
 907 int aq_nic_stop(struct aq_nic_s *self)
 908 {
 909         struct aq_vec_s *aq_vec = NULL;
 910         unsigned int i = 0U;
 911
 912         for (i = 0U, aq_vec = self->aq_vec[0];
 913                 self->aq_vecs > i; ++i, aq_vec = self->aq_vec[i])
 914                 aq_nic_ndev_queue_stop(self, i);
 915
 916         del_timer_sync(&self->service_timer);
 917
 918         self->aq_hw_ops.hw_irq_disable(self->aq_hw, AQ_CFG_IRQ_MASK);
 919
 920         if (self->aq_nic_cfg.is_polling)
 921                 del_timer_sync(&self->polling_timer);
 922         else
 923                 aq_pci_func_free_irqs(self->aq_pci_func);
 924
 925         for (i = 0U, aq_vec = self->aq_vec[0];
 926                 self->aq_vecs > i; ++i, aq_vec = self->aq_vec[i])
 927                 aq_vec_stop(aq_vec);
 928
 929         return self->aq_hw_ops.hw_stop(self->aq_hw);
 930 }
 931
 932 void aq_nic_deinit(struct aq_nic_s *self)
 933 {
 934         struct aq_vec_s *aq_vec = NULL;
 935         unsigned int i = 0U;
 936
 937         if (!self)
 938                 goto err_exit;
 939
 940         for (i = 0U, aq_vec = self->aq_vec[0];
 941                 self->aq_vecs > i; ++i, aq_vec = self->aq_vec[i])
 942                 aq_vec_deinit(aq_vec);
 943
 944         if (self->power_state == AQ_HW_POWER_STATE_D0) {
 945                 (void)self->aq_hw_ops.hw_deinit(self->aq_hw);
 946         } else {
 947                 (void)self->aq_hw_ops.hw_set_power(self->aq_hw,
 948                                                    self->power_state);
 949         }
 950
 951 err_exit:;
 952 }
 953
 954 void aq_nic_free_hot_resources(struct aq_nic_s *self)
 955 {
 956         unsigned int i = 0U;
 957
 958         if (!self)
 959                 goto err_exit;
 960
 961         for (i = AQ_DIMOF(self->aq_vec); i--;) {
 962                 if (self->aq_vec[i]) {
 963                         aq_vec_free(self->aq_vec[i]);
 964                         self->aq_vec[i] = NULL;
 965                 }
 966         }
 967
 968 err_exit:;
 969 }
 970
 971 int aq_nic_change_pm_state(struct aq_nic_s *self, pm_message_t *pm_msg)
 972 {
 973         int err = 0;
 974
 975         if (!netif_running(self->ndev)) {
 976                 err = 0;
 977                 goto out;
 978         }
 979         rtnl_lock();
 980         if (pm_msg->event & PM_EVENT_SLEEP || pm_msg->event & PM_EVENT_FREEZE) {
 981                 self->power_state = AQ_HW_POWER_STATE_D3;
 982                 netif_device_detach(self->ndev);
 983                 netif_tx_stop_all_queues(self->ndev);
 984
 985                 err = aq_nic_stop(self);
 986                 if (err < 0)
 987                         goto err_exit;
 988
 989                 aq_nic_deinit(self);
 990         } else {
 991                 err = aq_nic_init(self);
 992                 if (err < 0)
 993                         goto err_exit;
 994
 995                 err = aq_nic_start(self);
 996                 if (err < 0)
 997                         goto err_exit;
 998
 999                 netif_device_attach(self->ndev);
1000                 netif_tx_start_all_queues(self->ndev);
1001         }
1002
1003 err_exit:
1004         rtnl_unlock();
1005 out:
1006         return err;
1007 }