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 = aq_ring_next_dx(ring, dx);
 491                 dx_buff = &ring->buff_ring[dx];
 492                 ++ret;
 493         }
 494
 495         dx_buff->flags = 0U;
 496         dx_buff->len = skb_headlen(skb);
 497         dx_buff->pa = dma_map_single(aq_nic_get_dev(self),
 498                                      skb->data,
 499                                      dx_buff->len,
 500                                      DMA_TO_DEVICE);
 501
 502         if (unlikely(dma_mapping_error(aq_nic_get_dev(self), dx_buff->pa)))
 503                 goto exit;
 504
 505         dx_buff->len_pkt = skb->len;
 506         dx_buff->is_sop = 1U;
 507         dx_buff->is_mapped = 1U;
 508         ++ret;
 509
 510         if (skb->ip_summed == CHECKSUM_PARTIAL) {
 511                 dx_buff->is_ip_cso = (htons(ETH_P_IP) == skb->protocol) ?
 512                         1U : 0U;
 513                 dx_buff->is_tcp_cso =
 514                         (ip_hdr(skb)->protocol == IPPROTO_TCP) ? 1U : 0U;
 515                 dx_buff->is_udp_cso =
 516                         (ip_hdr(skb)->protocol == IPPROTO_UDP) ? 1U : 0U;
 517         }
 518
 519         for (; nr_frags--; ++frag_count) {
 520                 unsigned int frag_len = 0U;
 521                 dma_addr_t frag_pa;
 522                 skb_frag_t *frag = &skb_shinfo(skb)->frags[frag_count];
 523
 524                 frag_len = skb_frag_size(frag);
 525                 frag_pa = skb_frag_dma_map(aq_nic_get_dev(self), frag, 0,
 526                                            frag_len, DMA_TO_DEVICE);
 527
 528                 if (unlikely(dma_mapping_error(aq_nic_get_dev(self), frag_pa)))
 529                         goto mapping_error;
 530
 531                 while (frag_len > AQ_CFG_TX_FRAME_MAX) {
 532                         dx = aq_ring_next_dx(ring, dx);
 533                         dx_buff = &ring->buff_ring[dx];
 534
 535                         dx_buff->flags = 0U;
 536                         dx_buff->len = AQ_CFG_TX_FRAME_MAX;
 537                         dx_buff->pa = frag_pa;
 538                         dx_buff->is_mapped = 1U;
 539
 540                         frag_len -= AQ_CFG_TX_FRAME_MAX;
 541                         frag_pa += AQ_CFG_TX_FRAME_MAX;
 542                         ++ret;
 543                 }
 544
 545                 dx = aq_ring_next_dx(ring, dx);
 546                 dx_buff = &ring->buff_ring[dx];
 547
 548                 dx_buff->flags = 0U;
 549                 dx_buff->len = frag_len;
 550                 dx_buff->pa = frag_pa;
 551                 dx_buff->is_mapped = 1U;
 552                 ++ret;
 553         }
 554
 555         dx_buff->is_eop = 1U;
 556         dx_buff->skb = skb;
 557         goto exit;
 558
 559 mapping_error:
 560         for (dx = ring->sw_tail;
 561              ret > 0;
 562              --ret, dx = aq_ring_next_dx(ring, dx)) {
 563                 dx_buff = &ring->buff_ring[dx];
 564
 565                 if (!dx_buff->is_txc && dx_buff->pa) {
 566                         if (unlikely(dx_buff->is_sop)) {
 567                                 dma_unmap_single(aq_nic_get_dev(self),
 568                                                  dx_buff->pa,
 569                                                  dx_buff->len,
 570                                                  DMA_TO_DEVICE);
 571                         } else {
 572                                 dma_unmap_page(aq_nic_get_dev(self),
 573                                                dx_buff->pa,
 574                                                dx_buff->len,
 575                                                DMA_TO_DEVICE);
 576                         }
 577                 }
 578         }
 579
 580 exit:
 581         return ret;
 582 }
 583
 584 int aq_nic_xmit(struct aq_nic_s *self, struct sk_buff *skb)
 585 __releases(&ring->lock)
 586 __acquires(&ring->lock)
 587 {
 588         struct aq_ring_s *ring = NULL;
 589         unsigned int frags = 0U;
 590         unsigned int vec = skb->queue_mapping % self->aq_nic_cfg.vecs;
 591         unsigned int tc = 0U;
 592         unsigned int trys = AQ_CFG_LOCK_TRYS;
 593         int err = NETDEV_TX_OK;
 594         bool is_nic_in_bad_state;
 595
 596         frags = skb_shinfo(skb)->nr_frags + 1;
 597
 598         ring = self->aq_ring_tx[AQ_NIC_TCVEC2RING(self, tc, vec)];
 599
 600         if (frags > AQ_CFG_SKB_FRAGS_MAX) {
 601                 dev_kfree_skb_any(skb);
 602                 goto err_exit;
 603         }
 604
 605         is_nic_in_bad_state = aq_utils_obj_test(&self->header.flags,
 606                                                 AQ_NIC_FLAGS_IS_NOT_TX_READY) ||
 607                                                 (aq_ring_avail_dx(ring) <
 608                                                 AQ_CFG_SKB_FRAGS_MAX);
 609
 610         if (is_nic_in_bad_state) {
 611                 aq_nic_ndev_queue_stop(self, ring->idx);
 612                 err = NETDEV_TX_BUSY;
 613                 goto err_exit;
 614         }
 615
 616         do {
 617                 if (spin_trylock(&ring->header.lock)) {
 618                         frags = aq_nic_map_skb(self, skb, ring);
 619
 620                         if (likely(frags)) {
 621                                 err = self->aq_hw_ops.hw_ring_tx_xmit(
 622                                                                 self->aq_hw,
 623                                                                 ring, frags);
 624                                 if (err >= 0) {
 625                                         if (aq_ring_avail_dx(ring) <
 626                                             AQ_CFG_SKB_FRAGS_MAX + 1)
 627                                                 aq_nic_ndev_queue_stop(
 628                                                                 self,
 629                                                                 ring->idx);
 630
 631                                         ++ring->stats.tx.packets;
 632                                         ring->stats.tx.bytes += skb->len;
 633                                 }
 634                         } else {
 635                                 err = NETDEV_TX_BUSY;
 636                         }
 637
 638                         spin_unlock(&ring->header.lock);
 639                         break;
 640                 }
 641         } while (--trys);
 642
 643         if (!trys) {
 644                 err = NETDEV_TX_BUSY;
 645                 goto err_exit;
 646         }
 647
 648 err_exit:
 649         return err;
 650 }
 651
 652 int aq_nic_set_packet_filter(struct aq_nic_s *self, unsigned int flags)
 653 {
 654         int err = 0;
 655
 656         err = self->aq_hw_ops.hw_packet_filter_set(self->aq_hw, flags);
 657         if (err < 0)
 658                 goto err_exit;
 659
 660         self->packet_filter = flags;
 661
 662 err_exit:
 663         return err;
 664 }
 665
 666 int aq_nic_set_multicast_list(struct aq_nic_s *self, struct net_device *ndev)
 667 {
 668         struct netdev_hw_addr *ha = NULL;
 669         unsigned int i = 0U;
 670
 671         self->mc_list.count = 0U;
 672
 673         netdev_for_each_mc_addr(ha, ndev) {
 674                 ether_addr_copy(self->mc_list.ar[i++], ha->addr);
 675                 ++self->mc_list.count;
 676         }
 677
 678         return self->aq_hw_ops.hw_multicast_list_set(self->aq_hw,
 679                                                     self->mc_list.ar,
 680                                                     self->mc_list.count);
 681 }
 682
 683 int aq_nic_set_mtu(struct aq_nic_s *self, int new_mtu)
 684 {
 685         int err = 0;
 686
 687         if (new_mtu > self->aq_hw_caps.mtu) {
 688                 err = -EINVAL;
 689                 goto err_exit;
 690         }
 691         self->aq_nic_cfg.mtu = new_mtu;
 692
 693 err_exit:
 694         return err;
 695 }
 696
 697 int aq_nic_set_mac(struct aq_nic_s *self, struct net_device *ndev)
 698 {
 699         return self->aq_hw_ops.hw_set_mac_address(self->aq_hw, ndev->dev_addr);
 700 }
 701
 702 unsigned int aq_nic_get_link_speed(struct aq_nic_s *self)
 703 {
 704         return self->link_status.mbps;
 705 }
 706
 707 int aq_nic_get_regs(struct aq_nic_s *self, struct ethtool_regs *regs, void *p)
 708 {
 709         u32 *regs_buff = p;
 710         int err = 0;
 711
 712         regs->version = 1;
 713
 714         err = self->aq_hw_ops.hw_get_regs(self->aq_hw,
 715                                           &self->aq_hw_caps, regs_buff);
 716         if (err < 0)
 717                 goto err_exit;
 718
 719 err_exit:
 720         return err;
 721 }
 722
 723 int aq_nic_get_regs_count(struct aq_nic_s *self)
 724 {
 725         return self->aq_hw_caps.mac_regs_count;
 726 }
 727
 728 void aq_nic_get_stats(struct aq_nic_s *self, u64 *data)
 729 {
 730         struct aq_vec_s *aq_vec = NULL;
 731         unsigned int i = 0U;
 732         unsigned int count = 0U;
 733         int err = 0;
 734
 735         err = self->aq_hw_ops.hw_get_hw_stats(self->aq_hw, data, &count);
 736         if (err < 0)
 737                 goto err_exit;
 738
 739         data += count;
 740         count = 0U;
 741
 742         for (i = 0U, aq_vec = self->aq_vec[0];
 743                 self->aq_vecs > i; ++i, aq_vec = self->aq_vec[i]) {
 744                 data += count;
 745                 aq_vec_get_sw_stats(aq_vec, data, &count);
 746         }
 747
 748 err_exit:;
 749         (void)err;
 750 }
 751
 752 void aq_nic_get_link_ksettings(struct aq_nic_s *self,
 753                                struct ethtool_link_ksettings *cmd)
 754 {
 755         cmd->base.port = PORT_TP;
 756         /* This driver supports only 10G capable adapters, so DUPLEX_FULL */
 757         cmd->base.duplex = DUPLEX_FULL;
 758         cmd->base.autoneg = self->aq_nic_cfg.is_autoneg;
 759
 760         ethtool_link_ksettings_zero_link_mode(cmd, supported);
 761
 762         if (self->aq_hw_caps.link_speed_msk & AQ_NIC_RATE_10G)
 763                 ethtool_link_ksettings_add_link_mode(cmd, supported,
 764                                                      10000baseT_Full);
 765
 766         if (self->aq_hw_caps.link_speed_msk & AQ_NIC_RATE_5G)
 767                 ethtool_link_ksettings_add_link_mode(cmd, supported,
 768                                                      5000baseT_Full);
 769
 770         if (self->aq_hw_caps.link_speed_msk & AQ_NIC_RATE_2GS)
 771                 ethtool_link_ksettings_add_link_mode(cmd, supported,
 772                                                      2500baseT_Full);
 773
 774         if (self->aq_hw_caps.link_speed_msk & AQ_NIC_RATE_1G)
 775                 ethtool_link_ksettings_add_link_mode(cmd, supported,
 776                                                      1000baseT_Full);
 777
 778         if (self->aq_hw_caps.link_speed_msk & AQ_NIC_RATE_100M)
 779                 ethtool_link_ksettings_add_link_mode(cmd, supported,
 780                                                      100baseT_Full);
 781
 782         if (self->aq_hw_caps.flow_control)
 783                 ethtool_link_ksettings_add_link_mode(cmd, supported,
 784                                                      Pause);
 785
 786         ethtool_link_ksettings_add_link_mode(cmd, supported, Autoneg);
 787         ethtool_link_ksettings_add_link_mode(cmd, supported, TP);
 788
 789         ethtool_link_ksettings_zero_link_mode(cmd, advertising);
 790
 791         if (self->aq_nic_cfg.is_autoneg)
 792                 ethtool_link_ksettings_add_link_mode(cmd, advertising, Autoneg);
 793
 794         if (self->aq_nic_cfg.link_speed_msk  & AQ_NIC_RATE_10G)
 795                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
 796                                                      10000baseT_Full);
 797
 798         if (self->aq_nic_cfg.link_speed_msk  & AQ_NIC_RATE_5G)
 799                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
 800                                                      5000baseT_Full);
 801
 802         if (self->aq_nic_cfg.link_speed_msk  & AQ_NIC_RATE_2GS)
 803                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
 804                                                      2500baseT_Full);
 805
 806         if (self->aq_nic_cfg.link_speed_msk  & AQ_NIC_RATE_1G)
 807                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
 808                                                      1000baseT_Full);
 809
 810         if (self->aq_nic_cfg.link_speed_msk  & AQ_NIC_RATE_100M)
 811                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
 812                                                      100baseT_Full);
 813
 814         if (self->aq_nic_cfg.flow_control)
 815                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
 816                                                      Pause);
 817
 818         ethtool_link_ksettings_add_link_mode(cmd, advertising, TP);
 819 }
 820
 821 int aq_nic_set_link_ksettings(struct aq_nic_s *self,
 822                               const struct ethtool_link_ksettings *cmd)
 823 {
 824         u32 speed = 0U;
 825         u32 rate = 0U;
 826         int err = 0;
 827
 828         if (cmd->base.autoneg == AUTONEG_ENABLE) {
 829                 rate = self->aq_hw_caps.link_speed_msk;
 830                 self->aq_nic_cfg.is_autoneg = true;
 831         } else {
 832                 speed = cmd->base.speed;
 833
 834                 switch (speed) {
 835                 case SPEED_100:
 836                         rate = AQ_NIC_RATE_100M;
 837                         break;
 838
 839                 case SPEED_1000:
 840                         rate = AQ_NIC_RATE_1G;
 841                         break;
 842
 843                 case SPEED_2500:
 844                         rate = AQ_NIC_RATE_2GS;
 845                         break;
 846
 847                 case SPEED_5000:
 848                         rate = AQ_NIC_RATE_5G;
 849                         break;
 850
 851                 case SPEED_10000:
 852                         rate = AQ_NIC_RATE_10G;
 853                         break;
 854
 855                 default:
 856                         err = -1;
 857                         goto err_exit;
 858                 break;
 859                 }
 860                 if (!(self->aq_hw_caps.link_speed_msk & rate)) {
 861                         err = -1;
 862                         goto err_exit;
 863                 }
 864
 865                 self->aq_nic_cfg.is_autoneg = false;
 866         }
 867
 868         err = self->aq_hw_ops.hw_set_link_speed(self->aq_hw, rate);
 869         if (err < 0)
 870                 goto err_exit;
 871
 872         self->aq_nic_cfg.link_speed_msk = rate;
 873
 874 err_exit:
 875         return err;
 876 }
 877
 878 struct aq_nic_cfg_s *aq_nic_get_cfg(struct aq_nic_s *self)
 879 {
 880         return &self->aq_nic_cfg;
 881 }
 882
 883 u32 aq_nic_get_fw_version(struct aq_nic_s *self)
 884 {
 885         u32 fw_version = 0U;
 886
 887         self->aq_hw_ops.hw_get_fw_version(self->aq_hw, &fw_version);
 888
 889         return fw_version;
 890 }
 891
 892 int aq_nic_stop(struct aq_nic_s *self)
 893 {
 894         struct aq_vec_s *aq_vec = NULL;
 895         unsigned int i = 0U;
 896
 897         for (i = 0U, aq_vec = self->aq_vec[0];
 898                 self->aq_vecs > i; ++i, aq_vec = self->aq_vec[i])
 899                 aq_nic_ndev_queue_stop(self, i);
 900
 901         del_timer_sync(&self->service_timer);
 902
 903         self->aq_hw_ops.hw_irq_disable(self->aq_hw, AQ_CFG_IRQ_MASK);
 904
 905         if (self->aq_nic_cfg.is_polling)
 906                 del_timer_sync(&self->polling_timer);
 907         else
 908                 aq_pci_func_free_irqs(self->aq_pci_func);
 909
 910         for (i = 0U, aq_vec = self->aq_vec[0];
 911                 self->aq_vecs > i; ++i, aq_vec = self->aq_vec[i])
 912                 aq_vec_stop(aq_vec);
 913
 914         return self->aq_hw_ops.hw_stop(self->aq_hw);
 915 }
 916
 917 void aq_nic_deinit(struct aq_nic_s *self)
 918 {
 919         struct aq_vec_s *aq_vec = NULL;
 920         unsigned int i = 0U;
 921
 922         if (!self)
 923                 goto err_exit;
 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_deinit(aq_vec);
 928
 929         if (self->power_state == AQ_HW_POWER_STATE_D0) {
 930                 (void)self->aq_hw_ops.hw_deinit(self->aq_hw);
 931         } else {
 932                 (void)self->aq_hw_ops.hw_set_power(self->aq_hw,
 933                                                    self->power_state);
 934         }
 935
 936 err_exit:;
 937 }
 938
 939 void aq_nic_free_hot_resources(struct aq_nic_s *self)
 940 {
 941         unsigned int i = 0U;
 942
 943         if (!self)
 944                 goto err_exit;
 945
 946         for (i = AQ_DIMOF(self->aq_vec); i--;) {
 947                 if (self->aq_vec[i])
 948                         aq_vec_free(self->aq_vec[i]);
 949         }
 950
 951 err_exit:;
 952 }
 953
 954 int aq_nic_change_pm_state(struct aq_nic_s *self, pm_message_t *pm_msg)
 955 {
 956         int err = 0;
 957
 958         if (!netif_running(self->ndev)) {
 959                 err = 0;
 960                 goto out;
 961         }
 962         rtnl_lock();
 963         if (pm_msg->event & PM_EVENT_SLEEP || pm_msg->event & PM_EVENT_FREEZE) {
 964                 self->power_state = AQ_HW_POWER_STATE_D3;
 965                 netif_device_detach(self->ndev);
 966                 netif_tx_stop_all_queues(self->ndev);
 967
 968                 err = aq_nic_stop(self);
 969                 if (err < 0)
 970                         goto err_exit;
 971
 972                 aq_nic_deinit(self);
 973         } else {
 974                 err = aq_nic_init(self);
 975                 if (err < 0)
 976                         goto err_exit;
 977
 978                 err = aq_nic_start(self);
 979                 if (err < 0)
 980                         goto err_exit;
 981
 982                 netif_device_attach(self->ndev);
 983                 netif_tx_start_all_queues(self->ndev);
 984         }
 985
 986 err_exit:
 987         rtnl_unlock();
 988 out:
 989         return err;
 990 }