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/moduleparam.h>
  20 #include <linux/netdevice.h>
  21 #include <linux/etherdevice.h>
  22 #include <linux/timer.h>
  23 #include <linux/cpu.h>
  24 #include <linux/ip.h>
  25 #include <linux/tcp.h>
  26 #include <net/ip.h>
  27
  28 static unsigned int aq_itr = AQ_CFG_INTERRUPT_MODERATION_AUTO;
  29 module_param_named(aq_itr, aq_itr, uint, 0644);
  30 MODULE_PARM_DESC(aq_itr, "Interrupt throttling mode");
  31
  32 static unsigned int aq_itr_tx;
  33 module_param_named(aq_itr_tx, aq_itr_tx, uint, 0644);
  34 MODULE_PARM_DESC(aq_itr_tx, "TX interrupt throttle rate");
  35
  36 static unsigned int aq_itr_rx;
  37 module_param_named(aq_itr_rx, aq_itr_rx, uint, 0644);
  38 MODULE_PARM_DESC(aq_itr_rx, "RX interrupt throttle rate");
  39
  40 static void aq_nic_rss_init(struct aq_nic_s *self, unsigned int num_rss_queues)
  41 {
  42         struct aq_nic_cfg_s *cfg = &self->aq_nic_cfg;
  43         struct aq_rss_parameters *rss_params = &cfg->aq_rss;
  44         int i = 0;
  45
  46         static u8 rss_key[40] = {
  47                 0x1e, 0xad, 0x71, 0x87, 0x65, 0xfc, 0x26, 0x7d,
  48                 0x0d, 0x45, 0x67, 0x74, 0xcd, 0x06, 0x1a, 0x18,
  49                 0xb6, 0xc1, 0xf0, 0xc7, 0xbb, 0x18, 0xbe, 0xf8,
  50                 0x19, 0x13, 0x4b, 0xa9, 0xd0, 0x3e, 0xfe, 0x70,
  51                 0x25, 0x03, 0xab, 0x50, 0x6a, 0x8b, 0x82, 0x0c
  52         };
  53
  54         rss_params->hash_secret_key_size = sizeof(rss_key);
  55         memcpy(rss_params->hash_secret_key, rss_key, sizeof(rss_key));
  56         rss_params->indirection_table_size = AQ_CFG_RSS_INDIRECTION_TABLE_MAX;
  57
  58         for (i = rss_params->indirection_table_size; i--;)
  59                 rss_params->indirection_table[i] = i & (num_rss_queues - 1);
  60 }
  61
  62 /* Fills aq_nic_cfg with valid defaults */
  63 static void aq_nic_cfg_init_defaults(struct aq_nic_s *self)
  64 {
  65         struct aq_nic_cfg_s *cfg = &self->aq_nic_cfg;
  66
  67         cfg->aq_hw_caps = &self->aq_hw_caps;
  68
  69         cfg->vecs = AQ_CFG_VECS_DEF;
  70         cfg->tcs = AQ_CFG_TCS_DEF;
  71
  72         cfg->rxds = AQ_CFG_RXDS_DEF;
  73         cfg->txds = AQ_CFG_TXDS_DEF;
  74
  75         cfg->is_polling = AQ_CFG_IS_POLLING_DEF;
  76
  77         cfg->itr = aq_itr;
  78         cfg->tx_itr = aq_itr_tx;
  79         cfg->rx_itr = aq_itr_rx;
  80
  81         cfg->is_rss = AQ_CFG_IS_RSS_DEF;
  82         cfg->num_rss_queues = AQ_CFG_NUM_RSS_QUEUES_DEF;
  83         cfg->aq_rss.base_cpu_number = AQ_CFG_RSS_BASE_CPU_NUM_DEF;
  84         cfg->flow_control = AQ_CFG_FC_MODE;
  85
  86         cfg->mtu = AQ_CFG_MTU_DEF;
  87         cfg->link_speed_msk = AQ_CFG_SPEED_MSK;
  88         cfg->is_autoneg = AQ_CFG_IS_AUTONEG_DEF;
  89
  90         cfg->is_lro = AQ_CFG_IS_LRO_DEF;
  91
  92         cfg->vlan_id = 0U;
  93
  94         aq_nic_rss_init(self, cfg->num_rss_queues);
  95 }
  96
  97 /* Checks hw_caps and 'corrects' aq_nic_cfg in runtime */
  98 int aq_nic_cfg_start(struct aq_nic_s *self)
  99 {
 100         struct aq_nic_cfg_s *cfg = &self->aq_nic_cfg;
 101
 102         /*descriptors */
 103         cfg->rxds = min(cfg->rxds, cfg->aq_hw_caps->rxds);
 104         cfg->txds = min(cfg->txds, cfg->aq_hw_caps->txds);
 105
 106         /*rss rings */
 107         cfg->vecs = min(cfg->vecs, cfg->aq_hw_caps->vecs);
 108         cfg->vecs = min(cfg->vecs, num_online_cpus());
 109         /* cfg->vecs should be power of 2 for RSS */
 110         if (cfg->vecs >= 8U)
 111                 cfg->vecs = 8U;
 112         else if (cfg->vecs >= 4U)
 113                 cfg->vecs = 4U;
 114         else if (cfg->vecs >= 2U)
 115                 cfg->vecs = 2U;
 116         else
 117                 cfg->vecs = 1U;
 118
 119         cfg->num_rss_queues = min(cfg->vecs, AQ_CFG_NUM_RSS_QUEUES_DEF);
 120
 121         cfg->irq_type = aq_pci_func_get_irq_type(self->aq_pci_func);
 122
 123         if ((cfg->irq_type == AQ_HW_IRQ_LEGACY) ||
 124             (self->aq_hw_caps.vecs == 1U) ||
 125             (cfg->vecs == 1U)) {
 126                 cfg->is_rss = 0U;
 127                 cfg->vecs = 1U;
 128         }
 129
 130         cfg->link_speed_msk &= self->aq_hw_caps.link_speed_msk;
 131         cfg->hw_features = self->aq_hw_caps.hw_features;
 132         return 0;
 133 }
 134
 135 static int aq_nic_update_link_status(struct aq_nic_s *self)
 136 {
 137         int err = self->aq_hw_ops.hw_get_link_status(self->aq_hw);
 138
 139         if (err)
 140                 return err;
 141
 142         if (self->link_status.mbps != self->aq_hw->aq_link_status.mbps) {
 143                 pr_info("%s: link change old %d new %d\n",
 144                         AQ_CFG_DRV_NAME, self->link_status.mbps,
 145                         self->aq_hw->aq_link_status.mbps);
 146                 aq_nic_update_interrupt_moderation_settings(self);
 147         }
 148
 149         self->link_status = self->aq_hw->aq_link_status;
 150         if (!netif_carrier_ok(self->ndev) && self->link_status.mbps) {
 151                 aq_utils_obj_set(&self->header.flags,
 152                                  AQ_NIC_FLAG_STARTED);
 153                 aq_utils_obj_clear(&self->header.flags,
 154                                    AQ_NIC_LINK_DOWN);
 155                 netif_carrier_on(self->ndev);
 156                 netif_tx_wake_all_queues(self->ndev);
 157         }
 158         if (netif_carrier_ok(self->ndev) && !self->link_status.mbps) {
 159                 netif_carrier_off(self->ndev);
 160                 netif_tx_disable(self->ndev);
 161                 aq_utils_obj_set(&self->header.flags, AQ_NIC_LINK_DOWN);
 162         }
 163         return 0;
 164 }
 165
 166 static void aq_nic_service_timer_cb(struct timer_list *t)
 167 {
 168         struct aq_nic_s *self = from_timer(self, t, service_timer);
 169         struct net_device *ndev = aq_nic_get_ndev(self);
 170         int err = 0;
 171         unsigned int i = 0U;
 172         struct aq_ring_stats_rx_s stats_rx;
 173         struct aq_ring_stats_tx_s stats_tx;
 174
 175         if (aq_utils_obj_test(&self->header.flags, AQ_NIC_FLAGS_IS_NOT_READY))
 176                 goto err_exit;
 177
 178         err = aq_nic_update_link_status(self);
 179         if (err)
 180                 goto err_exit;
 181
 182         if (self->aq_hw_ops.hw_update_stats)
 183                 self->aq_hw_ops.hw_update_stats(self->aq_hw);
 184
 185         memset(&stats_rx, 0U, sizeof(struct aq_ring_stats_rx_s));
 186         memset(&stats_tx, 0U, sizeof(struct aq_ring_stats_tx_s));
 187         for (i = AQ_DIMOF(self->aq_vec); i--;) {
 188                 if (self->aq_vec[i])
 189                         aq_vec_add_stats(self->aq_vec[i], &stats_rx, &stats_tx);
 190         }
 191
 192         ndev->stats.rx_packets = stats_rx.packets;
 193         ndev->stats.rx_bytes = stats_rx.bytes;
 194         ndev->stats.rx_errors = stats_rx.errors;
 195         ndev->stats.tx_packets = stats_tx.packets;
 196         ndev->stats.tx_bytes = stats_tx.bytes;
 197         ndev->stats.tx_errors = stats_tx.errors;
 198
 199 err_exit:
 200         mod_timer(&self->service_timer,
 201                   jiffies + AQ_CFG_SERVICE_TIMER_INTERVAL);
 202 }
 203
 204 static void aq_nic_polling_timer_cb(struct timer_list *t)
 205 {
 206         struct aq_nic_s *self = from_timer(self, t, polling_timer);
 207         struct aq_vec_s *aq_vec = NULL;
 208         unsigned int i = 0U;
 209
 210         for (i = 0U, aq_vec = self->aq_vec[0];
 211                 self->aq_vecs > i; ++i, aq_vec = self->aq_vec[i])
 212                 aq_vec_isr(i, (void *)aq_vec);
 213
 214         mod_timer(&self->polling_timer, jiffies +
 215                 AQ_CFG_POLLING_TIMER_INTERVAL);
 216 }
 217
 218 static struct net_device *aq_nic_ndev_alloc(void)
 219 {
 220         return alloc_etherdev_mq(sizeof(struct aq_nic_s), AQ_CFG_VECS_MAX);
 221 }
 222
 223 struct aq_nic_s *aq_nic_alloc_cold(const struct net_device_ops *ndev_ops,
 224                                    const struct ethtool_ops *et_ops,
 225                                    struct device *dev,
 226                                    struct aq_pci_func_s *aq_pci_func,
 227                                    unsigned int port,
 228                                    const struct aq_hw_ops *aq_hw_ops)
 229 {
 230         struct net_device *ndev = NULL;
 231         struct aq_nic_s *self = NULL;
 232         int err = 0;
 233
 234         ndev = aq_nic_ndev_alloc();
 235         if (!ndev) {
 236                 err = -ENOMEM;
 237                 goto err_exit;
 238         }
 239
 240         self = netdev_priv(ndev);
 241
 242         ndev->netdev_ops = ndev_ops;
 243         ndev->ethtool_ops = et_ops;
 244
 245         SET_NETDEV_DEV(ndev, dev);
 246
 247         ndev->if_port = port;
 248         self->ndev = ndev;
 249
 250         self->aq_pci_func = aq_pci_func;
 251
 252         self->aq_hw_ops = *aq_hw_ops;
 253         self->port = (u8)port;
 254
 255         self->aq_hw = self->aq_hw_ops.create(aq_pci_func, self->port,
 256                                                 &self->aq_hw_ops);
 257         err = self->aq_hw_ops.get_hw_caps(self->aq_hw, &self->aq_hw_caps);
 258         if (err < 0)
 259                 goto err_exit;
 260
 261         aq_nic_cfg_init_defaults(self);
 262
 263 err_exit:
 264         if (err < 0) {
 265                 aq_nic_free_hot_resources(self);
 266                 self = NULL;
 267         }
 268         return self;
 269 }
 270
 271 int aq_nic_ndev_register(struct aq_nic_s *self)
 272 {
 273         int err = 0;
 274
 275         if (!self->ndev) {
 276                 err = -EINVAL;
 277                 goto err_exit;
 278         }
 279         err = self->aq_hw_ops.hw_get_mac_permanent(self->aq_hw,
 280                             self->aq_nic_cfg.aq_hw_caps,
 281                             self->ndev->dev_addr);
 282         if (err < 0)
 283                 goto err_exit;
 284
 285 #if defined(AQ_CFG_MAC_ADDR_PERMANENT)
 286         {
 287                 static u8 mac_addr_permanent[] = AQ_CFG_MAC_ADDR_PERMANENT;
 288
 289                 ether_addr_copy(self->ndev->dev_addr, mac_addr_permanent);
 290         }
 291 #endif
 292
 293         netif_carrier_off(self->ndev);
 294
 295         netif_tx_disable(self->ndev);
 296
 297         err = register_netdev(self->ndev);
 298         if (err < 0)
 299                 goto err_exit;
 300
 301 err_exit:
 302         return err;
 303 }
 304
 305 int aq_nic_ndev_init(struct aq_nic_s *self)
 306 {
 307         struct aq_hw_caps_s *aq_hw_caps = self->aq_nic_cfg.aq_hw_caps;
 308         struct aq_nic_cfg_s *aq_nic_cfg = &self->aq_nic_cfg;
 309
 310         self->ndev->hw_features |= aq_hw_caps->hw_features;
 311         self->ndev->features = aq_hw_caps->hw_features;
 312         self->ndev->priv_flags = aq_hw_caps->hw_priv_flags;
 313         self->ndev->mtu = aq_nic_cfg->mtu - ETH_HLEN;
 314         self->ndev->max_mtu = self->aq_hw_caps.mtu - ETH_FCS_LEN - ETH_HLEN;
 315
 316         return 0;
 317 }
 318
 319 void aq_nic_ndev_free(struct aq_nic_s *self)
 320 {
 321         if (!self->ndev)
 322                 goto err_exit;
 323
 324         if (self->ndev->reg_state == NETREG_REGISTERED)
 325                 unregister_netdev(self->ndev);
 326
 327         if (self->aq_hw)
 328                 self->aq_hw_ops.destroy(self->aq_hw);
 329
 330         free_netdev(self->ndev);
 331
 332 err_exit:;
 333 }
 334
 335 struct aq_nic_s *aq_nic_alloc_hot(struct net_device *ndev)
 336 {
 337         struct aq_nic_s *self = NULL;
 338         int err = 0;
 339
 340         if (!ndev) {
 341                 err = -EINVAL;
 342                 goto err_exit;
 343         }
 344         self = netdev_priv(ndev);
 345
 346         if (!self) {
 347                 err = -EINVAL;
 348                 goto err_exit;
 349         }
 350         if (netif_running(ndev))
 351                 netif_tx_disable(ndev);
 352         netif_carrier_off(self->ndev);
 353
 354         for (self->aq_vecs = 0; self->aq_vecs < self->aq_nic_cfg.vecs;
 355                 self->aq_vecs++) {
 356                 self->aq_vec[self->aq_vecs] =
 357                     aq_vec_alloc(self, self->aq_vecs, &self->aq_nic_cfg);
 358                 if (!self->aq_vec[self->aq_vecs]) {
 359                         err = -ENOMEM;
 360                         goto err_exit;
 361                 }
 362         }
 363
 364 err_exit:
 365         if (err < 0) {
 366                 aq_nic_free_hot_resources(self);
 367                 self = NULL;
 368         }
 369         return self;
 370 }
 371
 372 void aq_nic_set_tx_ring(struct aq_nic_s *self, unsigned int idx,
 373                         struct aq_ring_s *ring)
 374 {
 375         self->aq_ring_tx[idx] = ring;
 376 }
 377
 378 struct device *aq_nic_get_dev(struct aq_nic_s *self)
 379 {
 380         return self->ndev->dev.parent;
 381 }
 382
 383 struct net_device *aq_nic_get_ndev(struct aq_nic_s *self)
 384 {
 385         return self->ndev;
 386 }
 387
 388 int aq_nic_init(struct aq_nic_s *self)
 389 {
 390         struct aq_vec_s *aq_vec = NULL;
 391         int err = 0;
 392         unsigned int i = 0U;
 393
 394         self->power_state = AQ_HW_POWER_STATE_D0;
 395         err = self->aq_hw_ops.hw_reset(self->aq_hw);
 396         if (err < 0)
 397                 goto err_exit;
 398
 399         err = self->aq_hw_ops.hw_init(self->aq_hw, &self->aq_nic_cfg,
 400                             aq_nic_get_ndev(self)->dev_addr);
 401         if (err < 0)
 402                 goto err_exit;
 403
 404         for (i = 0U, aq_vec = self->aq_vec[0];
 405                 self->aq_vecs > i; ++i, aq_vec = self->aq_vec[i])
 406                 aq_vec_init(aq_vec, &self->aq_hw_ops, self->aq_hw);
 407
 408 err_exit:
 409         return err;
 410 }
 411
 412 int aq_nic_start(struct aq_nic_s *self)
 413 {
 414         struct aq_vec_s *aq_vec = NULL;
 415         int err = 0;
 416         unsigned int i = 0U;
 417
 418         err = self->aq_hw_ops.hw_multicast_list_set(self->aq_hw,
 419                                                     self->mc_list.ar,
 420                                                     self->mc_list.count);
 421         if (err < 0)
 422                 goto err_exit;
 423
 424         err = self->aq_hw_ops.hw_packet_filter_set(self->aq_hw,
 425                                                    self->packet_filter);
 426         if (err < 0)
 427                 goto err_exit;
 428
 429         for (i = 0U, aq_vec = self->aq_vec[0];
 430                 self->aq_vecs > i; ++i, aq_vec = self->aq_vec[i]) {
 431                 err = aq_vec_start(aq_vec);
 432                 if (err < 0)
 433                         goto err_exit;
 434         }
 435
 436         err = self->aq_hw_ops.hw_start(self->aq_hw);
 437         if (err < 0)
 438                 goto err_exit;
 439
 440         err = aq_nic_update_interrupt_moderation_settings(self);
 441         if (err)
 442                 goto err_exit;
 443         timer_setup(&self->service_timer, aq_nic_service_timer_cb, 0);
 444         mod_timer(&self->service_timer, jiffies +
 445                         AQ_CFG_SERVICE_TIMER_INTERVAL);
 446
 447         if (self->aq_nic_cfg.is_polling) {
 448                 timer_setup(&self->polling_timer, aq_nic_polling_timer_cb, 0);
 449                 mod_timer(&self->polling_timer, jiffies +
 450                           AQ_CFG_POLLING_TIMER_INTERVAL);
 451         } else {
 452                 for (i = 0U, aq_vec = self->aq_vec[0];
 453                         self->aq_vecs > i; ++i, aq_vec = self->aq_vec[i]) {
 454                         err = aq_pci_func_alloc_irq(self->aq_pci_func, i,
 455                                                     self->ndev->name, aq_vec,
 456                                         aq_vec_get_affinity_mask(aq_vec));
 457                         if (err < 0)
 458                                 goto err_exit;
 459                 }
 460
 461                 err = self->aq_hw_ops.hw_irq_enable(self->aq_hw,
 462                                     AQ_CFG_IRQ_MASK);
 463                 if (err < 0)
 464                         goto err_exit;
 465         }
 466
 467         err = netif_set_real_num_tx_queues(self->ndev, self->aq_vecs);
 468         if (err < 0)
 469                 goto err_exit;
 470
 471         err = netif_set_real_num_rx_queues(self->ndev, self->aq_vecs);
 472         if (err < 0)
 473                 goto err_exit;
 474
 475         netif_tx_start_all_queues(self->ndev);
 476
 477 err_exit:
 478         return err;
 479 }
 480
 481 static unsigned int aq_nic_map_skb(struct aq_nic_s *self,
 482                                    struct sk_buff *skb,
 483                                    struct aq_ring_s *ring)
 484 {
 485         unsigned int ret = 0U;
 486         unsigned int nr_frags = skb_shinfo(skb)->nr_frags;
 487         unsigned int frag_count = 0U;
 488         unsigned int dx = ring->sw_tail;
 489         struct aq_ring_buff_s *first = NULL;
 490         struct aq_ring_buff_s *dx_buff = &ring->buff_ring[dx];
 491
 492         if (unlikely(skb_is_gso(skb))) {
 493                 dx_buff->flags = 0U;
 494                 dx_buff->len_pkt = skb->len;
 495                 dx_buff->len_l2 = ETH_HLEN;
 496                 dx_buff->len_l3 = ip_hdrlen(skb);
 497                 dx_buff->len_l4 = tcp_hdrlen(skb);
 498                 dx_buff->mss = skb_shinfo(skb)->gso_size;
 499                 dx_buff->is_txc = 1U;
 500                 dx_buff->eop_index = 0xffffU;
 501
 502                 dx_buff->is_ipv6 =
 503                         (ip_hdr(skb)->version == 6) ? 1U : 0U;
 504
 505                 dx = aq_ring_next_dx(ring, dx);
 506                 dx_buff = &ring->buff_ring[dx];
 507                 ++ret;
 508         }
 509
 510         dx_buff->flags = 0U;
 511         dx_buff->len = skb_headlen(skb);
 512         dx_buff->pa = dma_map_single(aq_nic_get_dev(self),
 513                                      skb->data,
 514                                      dx_buff->len,
 515                                      DMA_TO_DEVICE);
 516
 517         if (unlikely(dma_mapping_error(aq_nic_get_dev(self), dx_buff->pa)))
 518                 goto exit;
 519
 520         first = dx_buff;
 521         dx_buff->len_pkt = skb->len;
 522         dx_buff->is_sop = 1U;
 523         dx_buff->is_mapped = 1U;
 524         ++ret;
 525
 526         if (skb->ip_summed == CHECKSUM_PARTIAL) {
 527                 dx_buff->is_ip_cso = (htons(ETH_P_IP) == skb->protocol) ?
 528                         1U : 0U;
 529
 530                 if (ip_hdr(skb)->version == 4) {
 531                         dx_buff->is_tcp_cso =
 532                                 (ip_hdr(skb)->protocol == IPPROTO_TCP) ?
 533                                         1U : 0U;
 534                         dx_buff->is_udp_cso =
 535                                 (ip_hdr(skb)->protocol == IPPROTO_UDP) ?
 536                                         1U : 0U;
 537                 } else if (ip_hdr(skb)->version == 6) {
 538                         dx_buff->is_tcp_cso =
 539                                 (ipv6_hdr(skb)->nexthdr == NEXTHDR_TCP) ?
 540                                         1U : 0U;
 541                         dx_buff->is_udp_cso =
 542                                 (ipv6_hdr(skb)->nexthdr == NEXTHDR_UDP) ?
 543                                         1U : 0U;
 544                 }
 545         }
 546
 547         for (; nr_frags--; ++frag_count) {
 548                 unsigned int frag_len = 0U;
 549                 unsigned int buff_offset = 0U;
 550                 unsigned int buff_size = 0U;
 551                 dma_addr_t frag_pa;
 552                 skb_frag_t *frag = &skb_shinfo(skb)->frags[frag_count];
 553
 554                 frag_len = skb_frag_size(frag);
 555
 556                 while (frag_len) {
 557                         if (frag_len > AQ_CFG_TX_FRAME_MAX)
 558                                 buff_size = AQ_CFG_TX_FRAME_MAX;
 559                         else
 560                                 buff_size = frag_len;
 561
 562                         frag_pa = skb_frag_dma_map(aq_nic_get_dev(self),
 563                                                    frag,
 564                                                    buff_offset,
 565                                                    buff_size,
 566                                                    DMA_TO_DEVICE);
 567
 568                         if (unlikely(dma_mapping_error(aq_nic_get_dev(self),
 569                                                        frag_pa)))
 570                                 goto mapping_error;
 571
 572                         dx = aq_ring_next_dx(ring, dx);
 573                         dx_buff = &ring->buff_ring[dx];
 574
 575                         dx_buff->flags = 0U;
 576                         dx_buff->len = buff_size;
 577                         dx_buff->pa = frag_pa;
 578                         dx_buff->is_mapped = 1U;
 579                         dx_buff->eop_index = 0xffffU;
 580
 581                         frag_len -= buff_size;
 582                         buff_offset += buff_size;
 583
 584                         ++ret;
 585                 }
 586         }
 587
 588         first->eop_index = dx;
 589         dx_buff->is_eop = 1U;
 590         dx_buff->skb = skb;
 591         goto exit;
 592
 593 mapping_error:
 594         for (dx = ring->sw_tail;
 595              ret > 0;
 596              --ret, dx = aq_ring_next_dx(ring, dx)) {
 597                 dx_buff = &ring->buff_ring[dx];
 598
 599                 if (!dx_buff->is_txc && dx_buff->pa) {
 600                         if (unlikely(dx_buff->is_sop)) {
 601                                 dma_unmap_single(aq_nic_get_dev(self),
 602                                                  dx_buff->pa,
 603                                                  dx_buff->len,
 604                                                  DMA_TO_DEVICE);
 605                         } else {
 606                                 dma_unmap_page(aq_nic_get_dev(self),
 607                                                dx_buff->pa,
 608                                                dx_buff->len,
 609                                                DMA_TO_DEVICE);
 610                         }
 611                 }
 612         }
 613
 614 exit:
 615         return ret;
 616 }
 617
 618 int aq_nic_xmit(struct aq_nic_s *self, struct sk_buff *skb)
 619 {
 620         struct aq_ring_s *ring = NULL;
 621         unsigned int frags = 0U;
 622         unsigned int vec = skb->queue_mapping % self->aq_nic_cfg.vecs;
 623         unsigned int tc = 0U;
 624         int err = NETDEV_TX_OK;
 625
 626         frags = skb_shinfo(skb)->nr_frags + 1;
 627
 628         ring = self->aq_ring_tx[AQ_NIC_TCVEC2RING(self, tc, vec)];
 629
 630         if (frags > AQ_CFG_SKB_FRAGS_MAX) {
 631                 dev_kfree_skb_any(skb);
 632                 goto err_exit;
 633         }
 634
 635         aq_ring_update_queue_state(ring);
 636
 637         /* Above status update may stop the queue. Check this. */
 638         if (__netif_subqueue_stopped(self->ndev, ring->idx)) {
 639                 err = NETDEV_TX_BUSY;
 640                 goto err_exit;
 641         }
 642
 643         frags = aq_nic_map_skb(self, skb, ring);
 644
 645         if (likely(frags)) {
 646                 err = self->aq_hw_ops.hw_ring_tx_xmit(self->aq_hw,
 647                                                       ring,
 648                                                       frags);
 649                 if (err >= 0) {
 650                         ++ring->stats.tx.packets;
 651                         ring->stats.tx.bytes += skb->len;
 652                 }
 653         } else {
 654                 err = NETDEV_TX_BUSY;
 655         }
 656
 657 err_exit:
 658         return err;
 659 }
 660
 661 int aq_nic_update_interrupt_moderation_settings(struct aq_nic_s *self)
 662 {
 663         return self->aq_hw_ops.hw_interrupt_moderation_set(self->aq_hw);
 664 }
 665
 666 int aq_nic_set_packet_filter(struct aq_nic_s *self, unsigned int flags)
 667 {
 668         int err = 0;
 669
 670         err = self->aq_hw_ops.hw_packet_filter_set(self->aq_hw, flags);
 671         if (err < 0)
 672                 goto err_exit;
 673
 674         self->packet_filter = flags;
 675
 676 err_exit:
 677         return err;
 678 }
 679
 680 int aq_nic_set_multicast_list(struct aq_nic_s *self, struct net_device *ndev)
 681 {
 682         struct netdev_hw_addr *ha = NULL;
 683         unsigned int i = 0U;
 684
 685         self->mc_list.count = 0U;
 686
 687         netdev_for_each_mc_addr(ha, ndev) {
 688                 ether_addr_copy(self->mc_list.ar[i++], ha->addr);
 689                 ++self->mc_list.count;
 690
 691                 if (i >= AQ_CFG_MULTICAST_ADDRESS_MAX)
 692                         break;
 693         }
 694
 695         if (i >= AQ_CFG_MULTICAST_ADDRESS_MAX) {
 696                 /* Number of filters is too big: atlantic does not support this.
 697                  * Force all multi filter to support this.
 698                  * With this we disable all UC filters and setup "all pass"
 699                  * multicast mask
 700                  */
 701                 self->packet_filter |= IFF_ALLMULTI;
 702                 self->aq_hw->aq_nic_cfg->mc_list_count = 0;
 703                 return self->aq_hw_ops.hw_packet_filter_set(self->aq_hw,
 704                                                         self->packet_filter);
 705         } else {
 706                 return self->aq_hw_ops.hw_multicast_list_set(self->aq_hw,
 707                                                     self->mc_list.ar,
 708                                                     self->mc_list.count);
 709         }
 710 }
 711
 712 int aq_nic_set_mtu(struct aq_nic_s *self, int new_mtu)
 713 {
 714         self->aq_nic_cfg.mtu = new_mtu;
 715
 716         return 0;
 717 }
 718
 719 int aq_nic_set_mac(struct aq_nic_s *self, struct net_device *ndev)
 720 {
 721         return self->aq_hw_ops.hw_set_mac_address(self->aq_hw, ndev->dev_addr);
 722 }
 723
 724 unsigned int aq_nic_get_link_speed(struct aq_nic_s *self)
 725 {
 726         return self->link_status.mbps;
 727 }
 728
 729 int aq_nic_get_regs(struct aq_nic_s *self, struct ethtool_regs *regs, void *p)
 730 {
 731         u32 *regs_buff = p;
 732         int err = 0;
 733
 734         regs->version = 1;
 735
 736         err = self->aq_hw_ops.hw_get_regs(self->aq_hw,
 737                                           &self->aq_hw_caps, regs_buff);
 738         if (err < 0)
 739                 goto err_exit;
 740
 741 err_exit:
 742         return err;
 743 }
 744
 745 int aq_nic_get_regs_count(struct aq_nic_s *self)
 746 {
 747         return self->aq_hw_caps.mac_regs_count;
 748 }
 749
 750 void aq_nic_get_stats(struct aq_nic_s *self, u64 *data)
 751 {
 752         struct aq_vec_s *aq_vec = NULL;
 753         unsigned int i = 0U;
 754         unsigned int count = 0U;
 755         int err = 0;
 756
 757         err = self->aq_hw_ops.hw_get_hw_stats(self->aq_hw, data, &count);
 758         if (err < 0)
 759                 goto err_exit;
 760
 761         data += count;
 762         count = 0U;
 763
 764         for (i = 0U, aq_vec = self->aq_vec[0];
 765                 aq_vec && self->aq_vecs > i; ++i, aq_vec = self->aq_vec[i]) {
 766                 data += count;
 767                 aq_vec_get_sw_stats(aq_vec, data, &count);
 768         }
 769
 770 err_exit:;
 771         (void)err;
 772 }
 773
 774 void aq_nic_get_link_ksettings(struct aq_nic_s *self,
 775                                struct ethtool_link_ksettings *cmd)
 776 {
 777         cmd->base.port = PORT_TP;
 778         /* This driver supports only 10G capable adapters, so DUPLEX_FULL */
 779         cmd->base.duplex = DUPLEX_FULL;
 780         cmd->base.autoneg = self->aq_nic_cfg.is_autoneg;
 781
 782         ethtool_link_ksettings_zero_link_mode(cmd, supported);
 783
 784         if (self->aq_hw_caps.link_speed_msk & AQ_NIC_RATE_10G)
 785                 ethtool_link_ksettings_add_link_mode(cmd, supported,
 786                                                      10000baseT_Full);
 787
 788         if (self->aq_hw_caps.link_speed_msk & AQ_NIC_RATE_5G)
 789                 ethtool_link_ksettings_add_link_mode(cmd, supported,
 790                                                      5000baseT_Full);
 791
 792         if (self->aq_hw_caps.link_speed_msk & AQ_NIC_RATE_2GS)
 793                 ethtool_link_ksettings_add_link_mode(cmd, supported,
 794                                                      2500baseT_Full);
 795
 796         if (self->aq_hw_caps.link_speed_msk & AQ_NIC_RATE_1G)
 797                 ethtool_link_ksettings_add_link_mode(cmd, supported,
 798                                                      1000baseT_Full);
 799
 800         if (self->aq_hw_caps.link_speed_msk & AQ_NIC_RATE_100M)
 801                 ethtool_link_ksettings_add_link_mode(cmd, supported,
 802                                                      100baseT_Full);
 803
 804         if (self->aq_hw_caps.flow_control)
 805                 ethtool_link_ksettings_add_link_mode(cmd, supported,
 806                                                      Pause);
 807
 808         ethtool_link_ksettings_add_link_mode(cmd, supported, Autoneg);
 809         ethtool_link_ksettings_add_link_mode(cmd, supported, TP);
 810
 811         ethtool_link_ksettings_zero_link_mode(cmd, advertising);
 812
 813         if (self->aq_nic_cfg.is_autoneg)
 814                 ethtool_link_ksettings_add_link_mode(cmd, advertising, Autoneg);
 815
 816         if (self->aq_nic_cfg.link_speed_msk  & AQ_NIC_RATE_10G)
 817                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
 818                                                      10000baseT_Full);
 819
 820         if (self->aq_nic_cfg.link_speed_msk  & AQ_NIC_RATE_5G)
 821                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
 822                                                      5000baseT_Full);
 823
 824         if (self->aq_nic_cfg.link_speed_msk  & AQ_NIC_RATE_2GS)
 825                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
 826                                                      2500baseT_Full);
 827
 828         if (self->aq_nic_cfg.link_speed_msk  & AQ_NIC_RATE_1G)
 829                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
 830                                                      1000baseT_Full);
 831
 832         if (self->aq_nic_cfg.link_speed_msk  & AQ_NIC_RATE_100M)
 833                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
 834                                                      100baseT_Full);
 835
 836         if (self->aq_nic_cfg.flow_control)
 837                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
 838                                                      Pause);
 839
 840         ethtool_link_ksettings_add_link_mode(cmd, advertising, TP);
 841 }
 842
 843 int aq_nic_set_link_ksettings(struct aq_nic_s *self,
 844                               const struct ethtool_link_ksettings *cmd)
 845 {
 846         u32 speed = 0U;
 847         u32 rate = 0U;
 848         int err = 0;
 849
 850         if (cmd->base.autoneg == AUTONEG_ENABLE) {
 851                 rate = self->aq_hw_caps.link_speed_msk;
 852                 self->aq_nic_cfg.is_autoneg = true;
 853         } else {
 854                 speed = cmd->base.speed;
 855
 856                 switch (speed) {
 857                 case SPEED_100:
 858                         rate = AQ_NIC_RATE_100M;
 859                         break;
 860
 861                 case SPEED_1000:
 862                         rate = AQ_NIC_RATE_1G;
 863                         break;
 864
 865                 case SPEED_2500:
 866                         rate = AQ_NIC_RATE_2GS;
 867                         break;
 868
 869                 case SPEED_5000:
 870                         rate = AQ_NIC_RATE_5G;
 871                         break;
 872
 873                 case SPEED_10000:
 874                         rate = AQ_NIC_RATE_10G;
 875                         break;
 876
 877                 default:
 878                         err = -1;
 879                         goto err_exit;
 880                 break;
 881                 }
 882                 if (!(self->aq_hw_caps.link_speed_msk & rate)) {
 883                         err = -1;
 884                         goto err_exit;
 885                 }
 886
 887                 self->aq_nic_cfg.is_autoneg = false;
 888         }
 889
 890         err = self->aq_hw_ops.hw_set_link_speed(self->aq_hw, rate);
 891         if (err < 0)
 892                 goto err_exit;
 893
 894         self->aq_nic_cfg.link_speed_msk = rate;
 895
 896 err_exit:
 897         return err;
 898 }
 899
 900 struct aq_nic_cfg_s *aq_nic_get_cfg(struct aq_nic_s *self)
 901 {
 902         return &self->aq_nic_cfg;
 903 }
 904
 905 u32 aq_nic_get_fw_version(struct aq_nic_s *self)
 906 {
 907         u32 fw_version = 0U;
 908
 909         self->aq_hw_ops.hw_get_fw_version(self->aq_hw, &fw_version);
 910
 911         return fw_version;
 912 }
 913
 914 int aq_nic_stop(struct aq_nic_s *self)
 915 {
 916         struct aq_vec_s *aq_vec = NULL;
 917         unsigned int i = 0U;
 918
 919         netif_tx_disable(self->ndev);
 920         netif_carrier_off(self->ndev);
 921
 922         del_timer_sync(&self->service_timer);
 923
 924         self->aq_hw_ops.hw_irq_disable(self->aq_hw, AQ_CFG_IRQ_MASK);
 925
 926         if (self->aq_nic_cfg.is_polling)
 927                 del_timer_sync(&self->polling_timer);
 928         else
 929                 aq_pci_func_free_irqs(self->aq_pci_func);
 930
 931         for (i = 0U, aq_vec = self->aq_vec[0];
 932                 self->aq_vecs > i; ++i, aq_vec = self->aq_vec[i])
 933                 aq_vec_stop(aq_vec);
 934
 935         return self->aq_hw_ops.hw_stop(self->aq_hw);
 936 }
 937
 938 void aq_nic_deinit(struct aq_nic_s *self)
 939 {
 940         struct aq_vec_s *aq_vec = NULL;
 941         unsigned int i = 0U;
 942
 943         if (!self)
 944                 goto err_exit;
 945
 946         for (i = 0U, aq_vec = self->aq_vec[0];
 947                 self->aq_vecs > i; ++i, aq_vec = self->aq_vec[i])
 948                 aq_vec_deinit(aq_vec);
 949
 950         if (self->power_state == AQ_HW_POWER_STATE_D0) {
 951                 (void)self->aq_hw_ops.hw_deinit(self->aq_hw);
 952         } else {
 953                 (void)self->aq_hw_ops.hw_set_power(self->aq_hw,
 954                                                    self->power_state);
 955         }
 956
 957 err_exit:;
 958 }
 959
 960 void aq_nic_free_hot_resources(struct aq_nic_s *self)
 961 {
 962         unsigned int i = 0U;
 963
 964         if (!self)
 965                 goto err_exit;
 966
 967         for (i = AQ_DIMOF(self->aq_vec); i--;) {
 968                 if (self->aq_vec[i]) {
 969                         aq_vec_free(self->aq_vec[i]);
 970                         self->aq_vec[i] = NULL;
 971                 }
 972         }
 973
 974 err_exit:;
 975 }
 976
 977 int aq_nic_change_pm_state(struct aq_nic_s *self, pm_message_t *pm_msg)
 978 {
 979         int err = 0;
 980
 981         if (!netif_running(self->ndev)) {
 982                 err = 0;
 983                 goto out;
 984         }
 985         rtnl_lock();
 986         if (pm_msg->event & PM_EVENT_SLEEP || pm_msg->event & PM_EVENT_FREEZE) {
 987                 self->power_state = AQ_HW_POWER_STATE_D3;
 988                 netif_device_detach(self->ndev);
 989                 netif_tx_stop_all_queues(self->ndev);
 990
 991                 err = aq_nic_stop(self);
 992                 if (err < 0)
 993                         goto err_exit;
 994
 995                 aq_nic_deinit(self);
 996         } else {
 997                 err = aq_nic_init(self);
 998                 if (err < 0)
 999                         goto err_exit;
1000
1001                 err = aq_nic_start(self);
1002                 if (err < 0)
1003                         goto err_exit;
1004
1005                 netif_device_attach(self->ndev);
1006                 netif_tx_start_all_queues(self->ndev);
1007         }
1008
1009 err_exit:
1010         rtnl_unlock();
1011 out:
1012         return err;
1013 }