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