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         self = netdev_priv(ndev);
 206         if (!self) {
 207                 err = -EINVAL;
 208                 goto err_exit;
 209         }
 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         err = register_netdev(self->ndev);
 264         if (err < 0)
 265                 goto err_exit;
 266
 267         self->is_ndev_registered = true;
 268         netif_carrier_off(self->ndev);
 269
 270         for (i = AQ_CFG_VECS_MAX; i--;)
 271                 aq_nic_ndev_queue_stop(self, i);
 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->is_ndev_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_frag(struct aq_nic_s *self,
 471                                         struct sk_buff *skb,
 472                                         struct aq_ring_buff_s *dx)
 473 {
 474         unsigned int ret = 0U;
 475         unsigned int nr_frags = skb_shinfo(skb)->nr_frags;
 476         unsigned int frag_count = 0U;
 477
 478         dx->flags = 0U;
 479         dx->len = skb_headlen(skb);
 480         dx->pa = dma_map_single(aq_nic_get_dev(self), skb->data, dx->len,
 481                                 DMA_TO_DEVICE);
 482         dx->len_pkt = skb->len;
 483         dx->is_sop = 1U;
 484         dx->is_mapped = 1U;
 485
 486         ++ret;
 487
 488         if (skb->ip_summed == CHECKSUM_PARTIAL) {
 489                 dx->is_ip_cso = (htons(ETH_P_IP) == skb->protocol) ? 1U : 0U;
 490                 dx->is_tcp_cso =
 491                         (ip_hdr(skb)->protocol == IPPROTO_TCP) ? 1U : 0U;
 492                 dx->is_udp_cso =
 493                         (ip_hdr(skb)->protocol == IPPROTO_UDP) ? 1U : 0U;
 494         }
 495
 496         for (; nr_frags--; ++frag_count) {
 497                 unsigned int frag_len;
 498                 dma_addr_t frag_pa;
 499                 skb_frag_t *frag = &skb_shinfo(skb)->frags[frag_count];
 500
 501                 frag_len = skb_frag_size(frag);
 502
 503                 frag_pa = skb_frag_dma_map(aq_nic_get_dev(self), frag, 0,
 504                                            frag_len, DMA_TO_DEVICE);
 505
 506                 while (frag_len > AQ_CFG_TX_FRAME_MAX) {
 507                         ++dx;
 508                         ++ret;
 509                         dx->flags = 0U;
 510                         dx->len = AQ_CFG_TX_FRAME_MAX;
 511                         dx->pa = frag_pa;
 512                         dx->is_mapped = 1U;
 513
 514                         frag_len -= AQ_CFG_TX_FRAME_MAX;
 515                         frag_pa += AQ_CFG_TX_FRAME_MAX;
 516                 }
 517
 518                 ++dx;
 519                 ++ret;
 520
 521                 dx->flags = 0U;
 522                 dx->len = frag_len;
 523                 dx->pa = frag_pa;
 524                 dx->is_mapped = 1U;
 525         }
 526
 527         dx->is_eop = 1U;
 528         dx->skb = skb;
 529
 530         return ret;
 531 }
 532
 533 static unsigned int aq_nic_map_skb_lso(struct aq_nic_s *self,
 534                                        struct sk_buff *skb,
 535                                        struct aq_ring_buff_s *dx)
 536 {
 537         dx->flags = 0U;
 538         dx->len_pkt = skb->len;
 539         dx->len_l2 = ETH_HLEN;
 540         dx->len_l3 = ip_hdrlen(skb);
 541         dx->len_l4 = tcp_hdrlen(skb);
 542         dx->mss = skb_shinfo(skb)->gso_size;
 543         dx->is_txc = 1U;
 544         return 1U;
 545 }
 546
 547 static unsigned int aq_nic_map_skb(struct aq_nic_s *self, struct sk_buff *skb,
 548                                    struct aq_ring_buff_s *dx)
 549 {
 550         unsigned int ret = 0U;
 551
 552         if (unlikely(skb_is_gso(skb))) {
 553                 ret = aq_nic_map_skb_lso(self, skb, dx);
 554                 ++dx;
 555         }
 556
 557         ret += aq_nic_map_skb_frag(self, skb, dx);
 558
 559         return ret;
 560 }
 561
 562 int aq_nic_xmit(struct aq_nic_s *self, struct sk_buff *skb)
 563 __releases(&ring->lock)
 564 __acquires(&ring->lock)
 565 {
 566         struct aq_ring_s *ring = NULL;
 567         unsigned int frags = 0U;
 568         unsigned int vec = skb->queue_mapping % self->aq_nic_cfg.vecs;
 569         unsigned int tc = 0U;
 570         unsigned int trys = AQ_CFG_LOCK_TRYS;
 571         int err = 0;
 572         bool is_nic_in_bad_state;
 573         struct aq_ring_buff_s buffers[AQ_CFG_SKB_FRAGS_MAX];
 574
 575         frags = skb_shinfo(skb)->nr_frags + 1;
 576
 577         ring = self->aq_ring_tx[AQ_NIC_TCVEC2RING(self, tc, vec)];
 578
 579         if (frags > AQ_CFG_SKB_FRAGS_MAX) {
 580                 dev_kfree_skb_any(skb);
 581                 goto err_exit;
 582         }
 583
 584         is_nic_in_bad_state = aq_utils_obj_test(&self->header.flags,
 585                                                 AQ_NIC_FLAGS_IS_NOT_TX_READY) ||
 586                                                 (aq_ring_avail_dx(ring) <
 587                                                 AQ_CFG_SKB_FRAGS_MAX);
 588
 589         if (is_nic_in_bad_state) {
 590                 aq_nic_ndev_queue_stop(self, ring->idx);
 591                 err = NETDEV_TX_BUSY;
 592                 goto err_exit;
 593         }
 594
 595         do {
 596                 if (spin_trylock(&ring->header.lock)) {
 597                         frags = aq_nic_map_skb(self, skb, &buffers[0]);
 598
 599                         aq_ring_tx_append_buffs(ring, &buffers[0], frags);
 600
 601                         err = self->aq_hw_ops.hw_ring_tx_xmit(self->aq_hw,
 602                                                               ring, frags);
 603                         if (err >= 0) {
 604                                 if (aq_ring_avail_dx(ring) <
 605                                     AQ_CFG_SKB_FRAGS_MAX + 1)
 606                                         aq_nic_ndev_queue_stop(self, ring->idx);
 607                         }
 608                         spin_unlock(&ring->header.lock);
 609
 610                         if (err >= 0) {
 611                                 ++ring->stats.tx.packets;
 612                                 ring->stats.tx.bytes += skb->len;
 613                         }
 614                         break;
 615                 }
 616         } while (--trys);
 617
 618         if (!trys) {
 619                 err = NETDEV_TX_BUSY;
 620                 goto err_exit;
 621         }
 622
 623 err_exit:
 624         return err;
 625 }
 626
 627 int aq_nic_set_packet_filter(struct aq_nic_s *self, unsigned int flags)
 628 {
 629         int err = 0;
 630
 631         err = self->aq_hw_ops.hw_packet_filter_set(self->aq_hw, flags);
 632         if (err < 0)
 633                 goto err_exit;
 634
 635         self->packet_filter = flags;
 636
 637 err_exit:
 638         return err;
 639 }
 640
 641 int aq_nic_set_multicast_list(struct aq_nic_s *self, struct net_device *ndev)
 642 {
 643         struct netdev_hw_addr *ha = NULL;
 644         unsigned int i = 0U;
 645
 646         self->mc_list.count = 0U;
 647
 648         netdev_for_each_mc_addr(ha, ndev) {
 649                 ether_addr_copy(self->mc_list.ar[i++], ha->addr);
 650                 ++self->mc_list.count;
 651         }
 652
 653         return self->aq_hw_ops.hw_multicast_list_set(self->aq_hw,
 654                                                     self->mc_list.ar,
 655                                                     self->mc_list.count);
 656 }
 657
 658 int aq_nic_set_mtu(struct aq_nic_s *self, int new_mtu)
 659 {
 660         int err = 0;
 661
 662         if (new_mtu > self->aq_hw_caps.mtu) {
 663                 err = -EINVAL;
 664                 goto err_exit;
 665         }
 666         self->aq_nic_cfg.mtu = new_mtu;
 667
 668 err_exit:
 669         return err;
 670 }
 671
 672 int aq_nic_set_mac(struct aq_nic_s *self, struct net_device *ndev)
 673 {
 674         return self->aq_hw_ops.hw_set_mac_address(self->aq_hw, ndev->dev_addr);
 675 }
 676
 677 unsigned int aq_nic_get_link_speed(struct aq_nic_s *self)
 678 {
 679         return self->link_status.mbps;
 680 }
 681
 682 int aq_nic_get_regs(struct aq_nic_s *self, struct ethtool_regs *regs, void *p)
 683 {
 684         u32 *regs_buff = p;
 685         int err = 0;
 686
 687         regs->version = 1;
 688
 689         err = self->aq_hw_ops.hw_get_regs(self->aq_hw,
 690                                           &self->aq_hw_caps, regs_buff);
 691         if (err < 0)
 692                 goto err_exit;
 693
 694 err_exit:
 695         return err;
 696 }
 697
 698 int aq_nic_get_regs_count(struct aq_nic_s *self)
 699 {
 700         return self->aq_hw_caps.mac_regs_count;
 701 }
 702
 703 void aq_nic_get_stats(struct aq_nic_s *self, u64 *data)
 704 {
 705         struct aq_vec_s *aq_vec = NULL;
 706         unsigned int i = 0U;
 707         unsigned int count = 0U;
 708         int err = 0;
 709
 710         err = self->aq_hw_ops.hw_get_hw_stats(self->aq_hw, data, &count);
 711         if (err < 0)
 712                 goto err_exit;
 713
 714         data += count;
 715         count = 0U;
 716
 717         for (i = 0U, aq_vec = self->aq_vec[0];
 718                 self->aq_vecs > i; ++i, aq_vec = self->aq_vec[i]) {
 719                 data += count;
 720                 aq_vec_get_sw_stats(aq_vec, data, &count);
 721         }
 722
 723 err_exit:;
 724         (void)err;
 725 }
 726
 727 void aq_nic_get_link_ksettings(struct aq_nic_s *self,
 728                                struct ethtool_link_ksettings *cmd)
 729 {
 730         cmd->base.port = PORT_TP;
 731         /* This driver supports only 10G capable adapters, so DUPLEX_FULL */
 732         cmd->base.duplex = DUPLEX_FULL;
 733         cmd->base.autoneg = self->aq_nic_cfg.is_autoneg;
 734
 735         ethtool_link_ksettings_zero_link_mode(cmd, supported);
 736
 737         if (self->aq_hw_caps.link_speed_msk & AQ_NIC_RATE_10G)
 738                 ethtool_link_ksettings_add_link_mode(cmd, supported,
 739                                                      10000baseT_Full);
 740
 741         if (self->aq_hw_caps.link_speed_msk & AQ_NIC_RATE_5G)
 742                 ethtool_link_ksettings_add_link_mode(cmd, supported,
 743                                                      5000baseT_Full);
 744
 745         if (self->aq_hw_caps.link_speed_msk & AQ_NIC_RATE_2GS)
 746                 ethtool_link_ksettings_add_link_mode(cmd, supported,
 747                                                      2500baseT_Full);
 748
 749         if (self->aq_hw_caps.link_speed_msk & AQ_NIC_RATE_1G)
 750                 ethtool_link_ksettings_add_link_mode(cmd, supported,
 751                                                      1000baseT_Full);
 752
 753         if (self->aq_hw_caps.link_speed_msk & AQ_NIC_RATE_100M)
 754                 ethtool_link_ksettings_add_link_mode(cmd, supported,
 755                                                      100baseT_Full);
 756
 757         if (self->aq_hw_caps.flow_control)
 758                 ethtool_link_ksettings_add_link_mode(cmd, supported,
 759                                                      Pause);
 760
 761         ethtool_link_ksettings_add_link_mode(cmd, supported, Autoneg);
 762         ethtool_link_ksettings_add_link_mode(cmd, supported, TP);
 763
 764         ethtool_link_ksettings_zero_link_mode(cmd, advertising);
 765
 766         if (self->aq_nic_cfg.is_autoneg)
 767                 ethtool_link_ksettings_add_link_mode(cmd, advertising, Autoneg);
 768
 769         if (self->aq_nic_cfg.link_speed_msk  & AQ_NIC_RATE_10G)
 770                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
 771                                                      10000baseT_Full);
 772
 773         if (self->aq_nic_cfg.link_speed_msk  & AQ_NIC_RATE_5G)
 774                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
 775                                                      5000baseT_Full);
 776
 777         if (self->aq_nic_cfg.link_speed_msk  & AQ_NIC_RATE_2GS)
 778                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
 779                                                      2500baseT_Full);
 780
 781         if (self->aq_nic_cfg.link_speed_msk  & AQ_NIC_RATE_1G)
 782                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
 783                                                      1000baseT_Full);
 784
 785         if (self->aq_nic_cfg.link_speed_msk  & AQ_NIC_RATE_100M)
 786                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
 787                                                      100baseT_Full);
 788
 789         if (self->aq_nic_cfg.flow_control)
 790                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
 791                                                      Pause);
 792
 793         ethtool_link_ksettings_add_link_mode(cmd, advertising, TP);
 794 }
 795
 796 int aq_nic_set_link_ksettings(struct aq_nic_s *self,
 797                               const struct ethtool_link_ksettings *cmd)
 798 {
 799         u32 speed = 0U;
 800         u32 rate = 0U;
 801         int err = 0;
 802
 803         if (cmd->base.autoneg == AUTONEG_ENABLE) {
 804                 rate = self->aq_hw_caps.link_speed_msk;
 805                 self->aq_nic_cfg.is_autoneg = true;
 806         } else {
 807                 speed = cmd->base.speed;
 808
 809                 switch (speed) {
 810                 case SPEED_100:
 811                         rate = AQ_NIC_RATE_100M;
 812                         break;
 813
 814                 case SPEED_1000:
 815                         rate = AQ_NIC_RATE_1G;
 816                         break;
 817
 818                 case SPEED_2500:
 819                         rate = AQ_NIC_RATE_2GS;
 820                         break;
 821
 822                 case SPEED_5000:
 823                         rate = AQ_NIC_RATE_5G;
 824                         break;
 825
 826                 case SPEED_10000:
 827                         rate = AQ_NIC_RATE_10G;
 828                         break;
 829
 830                 default:
 831                         err = -1;
 832                         goto err_exit;
 833                 break;
 834                 }
 835                 if (!(self->aq_hw_caps.link_speed_msk & rate)) {
 836                         err = -1;
 837                         goto err_exit;
 838                 }
 839
 840                 self->aq_nic_cfg.is_autoneg = false;
 841         }
 842
 843         err = self->aq_hw_ops.hw_set_link_speed(self->aq_hw, rate);
 844         if (err < 0)
 845                 goto err_exit;
 846
 847         self->aq_nic_cfg.link_speed_msk = rate;
 848
 849 err_exit:
 850         return err;
 851 }
 852
 853 struct aq_nic_cfg_s *aq_nic_get_cfg(struct aq_nic_s *self)
 854 {
 855         return &self->aq_nic_cfg;
 856 }
 857
 858 u32 aq_nic_get_fw_version(struct aq_nic_s *self)
 859 {
 860         u32 fw_version = 0U;
 861
 862         self->aq_hw_ops.hw_get_fw_version(self->aq_hw, &fw_version);
 863
 864         return fw_version;
 865 }
 866
 867 int aq_nic_stop(struct aq_nic_s *self)
 868 {
 869         struct aq_vec_s *aq_vec = NULL;
 870         unsigned int i = 0U;
 871
 872         for (i = 0U, aq_vec = self->aq_vec[0];
 873                 self->aq_vecs > i; ++i, aq_vec = self->aq_vec[i])
 874                 aq_nic_ndev_queue_stop(self, i);
 875
 876         del_timer_sync(&self->service_timer);
 877
 878         self->aq_hw_ops.hw_irq_disable(self->aq_hw, AQ_CFG_IRQ_MASK);
 879
 880         if (self->aq_nic_cfg.is_polling)
 881                 del_timer_sync(&self->polling_timer);
 882         else
 883                 aq_pci_func_free_irqs(self->aq_pci_func);
 884
 885         for (i = 0U, aq_vec = self->aq_vec[0];
 886                 self->aq_vecs > i; ++i, aq_vec = self->aq_vec[i])
 887                 aq_vec_stop(aq_vec);
 888
 889         return self->aq_hw_ops.hw_stop(self->aq_hw);
 890 }
 891
 892 void aq_nic_deinit(struct aq_nic_s *self)
 893 {
 894         struct aq_vec_s *aq_vec = NULL;
 895         unsigned int i = 0U;
 896
 897         if (!self)
 898                 goto err_exit;
 899
 900         for (i = 0U, aq_vec = self->aq_vec[0];
 901                 self->aq_vecs > i; ++i, aq_vec = self->aq_vec[i])
 902                 aq_vec_deinit(aq_vec);
 903
 904         if (self->power_state == AQ_HW_POWER_STATE_D0) {
 905                 (void)self->aq_hw_ops.hw_deinit(self->aq_hw);
 906         } else {
 907                 (void)self->aq_hw_ops.hw_set_power(self->aq_hw,
 908                                                    self->power_state);
 909         }
 910
 911 err_exit:;
 912 }
 913
 914 void aq_nic_free_hot_resources(struct aq_nic_s *self)
 915 {
 916         unsigned int i = 0U;
 917
 918         if (!self)
 919                 goto err_exit;
 920
 921         for (i = AQ_DIMOF(self->aq_vec); i--;) {
 922                 if (self->aq_vec[i])
 923                         aq_vec_free(self->aq_vec[i]);
 924         }
 925
 926 err_exit:;
 927 }
 928
 929 int aq_nic_change_pm_state(struct aq_nic_s *self, pm_message_t *pm_msg)
 930 {
 931         int err = 0;
 932
 933         if (!netif_running(self->ndev)) {
 934                 err = 0;
 935                 goto err_exit;
 936         }
 937         rtnl_lock();
 938         if (pm_msg->event & PM_EVENT_SLEEP || pm_msg->event & PM_EVENT_FREEZE) {
 939                 self->power_state = AQ_HW_POWER_STATE_D3;
 940                 netif_device_detach(self->ndev);
 941                 netif_tx_stop_all_queues(self->ndev);
 942
 943                 err = aq_nic_stop(self);
 944                 if (err < 0)
 945                         goto err_exit;
 946
 947                 aq_nic_deinit(self);
 948         } else {
 949                 err = aq_nic_init(self);
 950                 if (err < 0)
 951                         goto err_exit;
 952
 953                 err = aq_nic_start(self);
 954                 if (err < 0)
 955                         goto err_exit;
 956
 957                 netif_device_attach(self->ndev);
 958                 netif_tx_start_all_queues(self->ndev);
 959         }
 960         rtnl_unlock();
 961
 962 err_exit:
 963         return err;
 964 }