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_main.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_update_ndev_stats(struct aq_nic_s *self);
  41
  42 static void aq_nic_rss_init(struct aq_nic_s *self, unsigned int num_rss_queues)
  43 {
  44         struct aq_nic_cfg_s *cfg = &self->aq_nic_cfg;
  45         struct aq_rss_parameters *rss_params = &cfg->aq_rss;
  46         int i = 0;
  47
  48         static u8 rss_key[AQ_CFG_RSS_HASHKEY_SIZE] = {
  49                 0x1e, 0xad, 0x71, 0x87, 0x65, 0xfc, 0x26, 0x7d,
  50                 0x0d, 0x45, 0x67, 0x74, 0xcd, 0x06, 0x1a, 0x18,
  51                 0xb6, 0xc1, 0xf0, 0xc7, 0xbb, 0x18, 0xbe, 0xf8,
  52                 0x19, 0x13, 0x4b, 0xa9, 0xd0, 0x3e, 0xfe, 0x70,
  53                 0x25, 0x03, 0xab, 0x50, 0x6a, 0x8b, 0x82, 0x0c
  54         };
  55
  56         rss_params->hash_secret_key_size = sizeof(rss_key);
  57         memcpy(rss_params->hash_secret_key, rss_key, sizeof(rss_key));
  58         rss_params->indirection_table_size = AQ_CFG_RSS_INDIRECTION_TABLE_MAX;
  59
  60         for (i = rss_params->indirection_table_size; i--;)
  61                 rss_params->indirection_table[i] = i & (num_rss_queues - 1);
  62 }
  63
  64 /* Checks hw_caps and 'corrects' aq_nic_cfg in runtime */
  65 void aq_nic_cfg_start(struct aq_nic_s *self)
  66 {
  67         struct aq_nic_cfg_s *cfg = &self->aq_nic_cfg;
  68
  69         cfg->tcs = AQ_CFG_TCS_DEF;
  70
  71         cfg->is_polling = AQ_CFG_IS_POLLING_DEF;
  72
  73         cfg->itr = aq_itr;
  74         cfg->tx_itr = aq_itr_tx;
  75         cfg->rx_itr = aq_itr_rx;
  76
  77         cfg->rxpageorder = AQ_CFG_RX_PAGEORDER;
  78         cfg->is_rss = AQ_CFG_IS_RSS_DEF;
  79         cfg->num_rss_queues = AQ_CFG_NUM_RSS_QUEUES_DEF;
  80         cfg->aq_rss.base_cpu_number = AQ_CFG_RSS_BASE_CPU_NUM_DEF;
  81         cfg->flow_control = AQ_CFG_FC_MODE;
  82
  83         cfg->mtu = AQ_CFG_MTU_DEF;
  84         cfg->link_speed_msk = AQ_CFG_SPEED_MSK;
  85         cfg->is_autoneg = AQ_CFG_IS_AUTONEG_DEF;
  86
  87         cfg->is_lro = AQ_CFG_IS_LRO_DEF;
  88
  89         /*descriptors */
  90         cfg->rxds = min(cfg->aq_hw_caps->rxds_max, AQ_CFG_RXDS_DEF);
  91         cfg->txds = min(cfg->aq_hw_caps->txds_max, AQ_CFG_TXDS_DEF);
  92
  93         /*rss rings */
  94         cfg->vecs = min(cfg->aq_hw_caps->vecs, AQ_CFG_VECS_DEF);
  95         cfg->vecs = min(cfg->vecs, num_online_cpus());
  96         if (self->irqvecs > AQ_HW_SERVICE_IRQS)
  97                 cfg->vecs = min(cfg->vecs, self->irqvecs - AQ_HW_SERVICE_IRQS);
  98         /* cfg->vecs should be power of 2 for RSS */
  99         if (cfg->vecs >= 8U)
 100                 cfg->vecs = 8U;
 101         else if (cfg->vecs >= 4U)
 102                 cfg->vecs = 4U;
 103         else if (cfg->vecs >= 2U)
 104                 cfg->vecs = 2U;
 105         else
 106                 cfg->vecs = 1U;
 107
 108         cfg->num_rss_queues = min(cfg->vecs, AQ_CFG_NUM_RSS_QUEUES_DEF);
 109
 110         aq_nic_rss_init(self, cfg->num_rss_queues);
 111
 112         cfg->irq_type = aq_pci_func_get_irq_type(self);
 113
 114         if ((cfg->irq_type == AQ_HW_IRQ_LEGACY) ||
 115             (cfg->aq_hw_caps->vecs == 1U) ||
 116             (cfg->vecs == 1U)) {
 117                 cfg->is_rss = 0U;
 118                 cfg->vecs = 1U;
 119         }
 120
 121         /* Check if we have enough vectors allocated for
 122          * link status IRQ. If no - we'll know link state from
 123          * slower service task.
 124          */
 125         if (AQ_HW_SERVICE_IRQS > 0 && cfg->vecs + 1 <= self->irqvecs)
 126                 cfg->link_irq_vec = cfg->vecs;
 127         else
 128                 cfg->link_irq_vec = 0;
 129
 130         cfg->link_speed_msk &= cfg->aq_hw_caps->link_speed_msk;
 131         cfg->features = cfg->aq_hw_caps->hw_features;
 132 }
 133
 134 static int aq_nic_update_link_status(struct aq_nic_s *self)
 135 {
 136         int err = self->aq_fw_ops->update_link_status(self->aq_hw);
 137         u32 fc = 0;
 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                 /* Driver has to update flow control settings on RX block
 149                  * on any link event.
 150                  * We should query FW whether it negotiated FC.
 151                  */
 152                 if (self->aq_fw_ops->get_flow_control)
 153                         self->aq_fw_ops->get_flow_control(self->aq_hw, &fc);
 154                 if (self->aq_hw_ops->hw_set_fc)
 155                         self->aq_hw_ops->hw_set_fc(self->aq_hw, fc, 0);
 156         }
 157
 158         self->link_status = self->aq_hw->aq_link_status;
 159         if (!netif_carrier_ok(self->ndev) && self->link_status.mbps) {
 160                 aq_utils_obj_set(&self->flags,
 161                                  AQ_NIC_FLAG_STARTED);
 162                 aq_utils_obj_clear(&self->flags,
 163                                    AQ_NIC_LINK_DOWN);
 164                 netif_carrier_on(self->ndev);
 165                 netif_tx_wake_all_queues(self->ndev);
 166         }
 167         if (netif_carrier_ok(self->ndev) && !self->link_status.mbps) {
 168                 netif_carrier_off(self->ndev);
 169                 netif_tx_disable(self->ndev);
 170                 aq_utils_obj_set(&self->flags, AQ_NIC_LINK_DOWN);
 171         }
 172         return 0;
 173 }
 174
 175 static irqreturn_t aq_linkstate_threaded_isr(int irq, void *private)
 176 {
 177         struct aq_nic_s *self = private;
 178
 179         if (!self)
 180                 return IRQ_NONE;
 181
 182         aq_nic_update_link_status(self);
 183
 184         self->aq_hw_ops->hw_irq_enable(self->aq_hw,
 185                                        BIT(self->aq_nic_cfg.link_irq_vec));
 186         return IRQ_HANDLED;
 187 }
 188
 189 static void aq_nic_service_task(struct work_struct *work)
 190 {
 191         struct aq_nic_s *self = container_of(work, struct aq_nic_s,
 192                                              service_task);
 193         int err;
 194
 195         if (aq_utils_obj_test(&self->flags, AQ_NIC_FLAGS_IS_NOT_READY))
 196                 return;
 197
 198         err = aq_nic_update_link_status(self);
 199         if (err)
 200                 return;
 201
 202         mutex_lock(&self->fwreq_mutex);
 203         if (self->aq_fw_ops->update_stats)
 204                 self->aq_fw_ops->update_stats(self->aq_hw);
 205         mutex_unlock(&self->fwreq_mutex);
 206
 207         aq_nic_update_ndev_stats(self);
 208 }
 209
 210 static void aq_nic_service_timer_cb(struct timer_list *t)
 211 {
 212         struct aq_nic_s *self = from_timer(self, t, service_timer);
 213
 214         mod_timer(&self->service_timer, jiffies + AQ_CFG_SERVICE_TIMER_INTERVAL);
 215
 216         aq_ndev_schedule_work(&self->service_task);
 217 }
 218
 219 static void aq_nic_polling_timer_cb(struct timer_list *t)
 220 {
 221         struct aq_nic_s *self = from_timer(self, t, polling_timer);
 222         struct aq_vec_s *aq_vec = NULL;
 223         unsigned int i = 0U;
 224
 225         for (i = 0U, aq_vec = self->aq_vec[0];
 226                 self->aq_vecs > i; ++i, aq_vec = self->aq_vec[i])
 227                 aq_vec_isr(i, (void *)aq_vec);
 228
 229         mod_timer(&self->polling_timer, jiffies +
 230                   AQ_CFG_POLLING_TIMER_INTERVAL);
 231 }
 232
 233 int aq_nic_ndev_register(struct aq_nic_s *self)
 234 {
 235         int err = 0;
 236
 237         if (!self->ndev) {
 238                 err = -EINVAL;
 239                 goto err_exit;
 240         }
 241
 242         err = hw_atl_utils_initfw(self->aq_hw, &self->aq_fw_ops);
 243         if (err)
 244                 goto err_exit;
 245
 246         mutex_lock(&self->fwreq_mutex);
 247         err = self->aq_fw_ops->get_mac_permanent(self->aq_hw,
 248                             self->ndev->dev_addr);
 249         mutex_unlock(&self->fwreq_mutex);
 250         if (err)
 251                 goto err_exit;
 252
 253 #if defined(AQ_CFG_MAC_ADDR_PERMANENT)
 254         {
 255                 static u8 mac_addr_permanent[] = AQ_CFG_MAC_ADDR_PERMANENT;
 256
 257                 ether_addr_copy(self->ndev->dev_addr, mac_addr_permanent);
 258         }
 259 #endif
 260
 261         for (self->aq_vecs = 0; self->aq_vecs < aq_nic_get_cfg(self)->vecs;
 262              self->aq_vecs++) {
 263                 self->aq_vec[self->aq_vecs] =
 264                     aq_vec_alloc(self, self->aq_vecs, aq_nic_get_cfg(self));
 265                 if (!self->aq_vec[self->aq_vecs]) {
 266                         err = -ENOMEM;
 267                         goto err_exit;
 268                 }
 269         }
 270
 271         netif_carrier_off(self->ndev);
 272
 273         netif_tx_disable(self->ndev);
 274
 275         err = register_netdev(self->ndev);
 276         if (err)
 277                 goto err_exit;
 278
 279 err_exit:
 280         return err;
 281 }
 282
 283 void aq_nic_ndev_init(struct aq_nic_s *self)
 284 {
 285         const struct aq_hw_caps_s *aq_hw_caps = self->aq_nic_cfg.aq_hw_caps;
 286         struct aq_nic_cfg_s *aq_nic_cfg = &self->aq_nic_cfg;
 287
 288         self->ndev->hw_features |= aq_hw_caps->hw_features;
 289         self->ndev->features = aq_hw_caps->hw_features;
 290         self->ndev->vlan_features |= NETIF_F_HW_CSUM | NETIF_F_RXCSUM |
 291                                      NETIF_F_RXHASH | NETIF_F_SG | NETIF_F_LRO;
 292         self->ndev->priv_flags = aq_hw_caps->hw_priv_flags;
 293         self->ndev->priv_flags |= IFF_LIVE_ADDR_CHANGE;
 294
 295         self->ndev->mtu = aq_nic_cfg->mtu - ETH_HLEN;
 296         self->ndev->max_mtu = aq_hw_caps->mtu - ETH_FCS_LEN - ETH_HLEN;
 297
 298 }
 299
 300 void aq_nic_set_tx_ring(struct aq_nic_s *self, unsigned int idx,
 301                         struct aq_ring_s *ring)
 302 {
 303         self->aq_ring_tx[idx] = ring;
 304 }
 305
 306 struct net_device *aq_nic_get_ndev(struct aq_nic_s *self)
 307 {
 308         return self->ndev;
 309 }
 310
 311 int aq_nic_init(struct aq_nic_s *self)
 312 {
 313         struct aq_vec_s *aq_vec = NULL;
 314         int err = 0;
 315         unsigned int i = 0U;
 316
 317         self->power_state = AQ_HW_POWER_STATE_D0;
 318         mutex_lock(&self->fwreq_mutex);
 319         err = self->aq_hw_ops->hw_reset(self->aq_hw);
 320         mutex_unlock(&self->fwreq_mutex);
 321         if (err < 0)
 322                 goto err_exit;
 323
 324         err = self->aq_hw_ops->hw_init(self->aq_hw,
 325                                        aq_nic_get_ndev(self)->dev_addr);
 326         if (err < 0)
 327                 goto err_exit;
 328
 329         for (i = 0U, aq_vec = self->aq_vec[0];
 330                 self->aq_vecs > i; ++i, aq_vec = self->aq_vec[i])
 331                 aq_vec_init(aq_vec, self->aq_hw_ops, self->aq_hw);
 332
 333         netif_carrier_off(self->ndev);
 334
 335 err_exit:
 336         return err;
 337 }
 338
 339 int aq_nic_start(struct aq_nic_s *self)
 340 {
 341         struct aq_vec_s *aq_vec = NULL;
 342         int err = 0;
 343         unsigned int i = 0U;
 344
 345         err = self->aq_hw_ops->hw_multicast_list_set(self->aq_hw,
 346                                                      self->mc_list.ar,
 347                                                      self->mc_list.count);
 348         if (err < 0)
 349                 goto err_exit;
 350
 351         err = self->aq_hw_ops->hw_packet_filter_set(self->aq_hw,
 352                                                     self->packet_filter);
 353         if (err < 0)
 354                 goto err_exit;
 355
 356         for (i = 0U, aq_vec = self->aq_vec[0];
 357                 self->aq_vecs > i; ++i, aq_vec = self->aq_vec[i]) {
 358                 err = aq_vec_start(aq_vec);
 359                 if (err < 0)
 360                         goto err_exit;
 361         }
 362
 363         err = self->aq_hw_ops->hw_start(self->aq_hw);
 364         if (err < 0)
 365                 goto err_exit;
 366
 367         err = aq_nic_update_interrupt_moderation_settings(self);
 368         if (err)
 369                 goto err_exit;
 370
 371         INIT_WORK(&self->service_task, aq_nic_service_task);
 372
 373         timer_setup(&self->service_timer, aq_nic_service_timer_cb, 0);
 374         aq_nic_service_timer_cb(&self->service_timer);
 375
 376         if (self->aq_nic_cfg.is_polling) {
 377                 timer_setup(&self->polling_timer, aq_nic_polling_timer_cb, 0);
 378                 mod_timer(&self->polling_timer, jiffies +
 379                           AQ_CFG_POLLING_TIMER_INTERVAL);
 380         } else {
 381                 for (i = 0U, aq_vec = self->aq_vec[0];
 382                         self->aq_vecs > i; ++i, aq_vec = self->aq_vec[i]) {
 383                         err = aq_pci_func_alloc_irq(self, i, self->ndev->name,
 384                                                     aq_vec_isr, aq_vec,
 385                                                     aq_vec_get_affinity_mask(aq_vec));
 386                         if (err < 0)
 387                                 goto err_exit;
 388                 }
 389
 390                 if (self->aq_nic_cfg.link_irq_vec) {
 391                         int irqvec = pci_irq_vector(self->pdev,
 392                                                    self->aq_nic_cfg.link_irq_vec);
 393                         err = request_threaded_irq(irqvec, NULL,
 394                                                    aq_linkstate_threaded_isr,
 395                                                    IRQF_SHARED,
 396                                                    self->ndev->name, self);
 397                         if (err < 0)
 398                                 goto err_exit;
 399                         self->msix_entry_mask |= (1 << self->aq_nic_cfg.link_irq_vec);
 400                 }
 401
 402                 err = self->aq_hw_ops->hw_irq_enable(self->aq_hw,
 403                                                      AQ_CFG_IRQ_MASK);
 404                 if (err < 0)
 405                         goto err_exit;
 406         }
 407
 408         err = netif_set_real_num_tx_queues(self->ndev, self->aq_vecs);
 409         if (err < 0)
 410                 goto err_exit;
 411
 412         err = netif_set_real_num_rx_queues(self->ndev, self->aq_vecs);
 413         if (err < 0)
 414                 goto err_exit;
 415
 416         netif_tx_start_all_queues(self->ndev);
 417
 418 err_exit:
 419         return err;
 420 }
 421
 422 static unsigned int aq_nic_map_skb(struct aq_nic_s *self,
 423                                    struct sk_buff *skb,
 424                                    struct aq_ring_s *ring)
 425 {
 426         unsigned int ret = 0U;
 427         unsigned int nr_frags = skb_shinfo(skb)->nr_frags;
 428         unsigned int frag_count = 0U;
 429         unsigned int dx = ring->sw_tail;
 430         struct aq_ring_buff_s *first = NULL;
 431         struct aq_ring_buff_s *dx_buff = &ring->buff_ring[dx];
 432
 433         if (unlikely(skb_is_gso(skb))) {
 434                 dx_buff->flags = 0U;
 435                 dx_buff->len_pkt = skb->len;
 436                 dx_buff->len_l2 = ETH_HLEN;
 437                 dx_buff->len_l3 = ip_hdrlen(skb);
 438                 dx_buff->len_l4 = tcp_hdrlen(skb);
 439                 dx_buff->mss = skb_shinfo(skb)->gso_size;
 440                 dx_buff->is_txc = 1U;
 441                 dx_buff->eop_index = 0xffffU;
 442
 443                 dx_buff->is_ipv6 =
 444                         (ip_hdr(skb)->version == 6) ? 1U : 0U;
 445
 446                 dx = aq_ring_next_dx(ring, dx);
 447                 dx_buff = &ring->buff_ring[dx];
 448                 ++ret;
 449         }
 450
 451         dx_buff->flags = 0U;
 452         dx_buff->len = skb_headlen(skb);
 453         dx_buff->pa = dma_map_single(aq_nic_get_dev(self),
 454                                      skb->data,
 455                                      dx_buff->len,
 456                                      DMA_TO_DEVICE);
 457
 458         if (unlikely(dma_mapping_error(aq_nic_get_dev(self), dx_buff->pa)))
 459                 goto exit;
 460
 461         first = dx_buff;
 462         dx_buff->len_pkt = skb->len;
 463         dx_buff->is_sop = 1U;
 464         dx_buff->is_mapped = 1U;
 465         ++ret;
 466
 467         if (skb->ip_summed == CHECKSUM_PARTIAL) {
 468                 dx_buff->is_ip_cso = (htons(ETH_P_IP) == skb->protocol) ?
 469                         1U : 0U;
 470
 471                 if (ip_hdr(skb)->version == 4) {
 472                         dx_buff->is_tcp_cso =
 473                                 (ip_hdr(skb)->protocol == IPPROTO_TCP) ?
 474                                         1U : 0U;
 475                         dx_buff->is_udp_cso =
 476                                 (ip_hdr(skb)->protocol == IPPROTO_UDP) ?
 477                                         1U : 0U;
 478                 } else if (ip_hdr(skb)->version == 6) {
 479                         dx_buff->is_tcp_cso =
 480                                 (ipv6_hdr(skb)->nexthdr == NEXTHDR_TCP) ?
 481                                         1U : 0U;
 482                         dx_buff->is_udp_cso =
 483                                 (ipv6_hdr(skb)->nexthdr == NEXTHDR_UDP) ?
 484                                         1U : 0U;
 485                 }
 486         }
 487
 488         for (; nr_frags--; ++frag_count) {
 489                 unsigned int frag_len = 0U;
 490                 unsigned int buff_offset = 0U;
 491                 unsigned int buff_size = 0U;
 492                 dma_addr_t frag_pa;
 493                 skb_frag_t *frag = &skb_shinfo(skb)->frags[frag_count];
 494
 495                 frag_len = skb_frag_size(frag);
 496
 497                 while (frag_len) {
 498                         if (frag_len > AQ_CFG_TX_FRAME_MAX)
 499                                 buff_size = AQ_CFG_TX_FRAME_MAX;
 500                         else
 501                                 buff_size = frag_len;
 502
 503                         frag_pa = skb_frag_dma_map(aq_nic_get_dev(self),
 504                                                    frag,
 505                                                    buff_offset,
 506                                                    buff_size,
 507                                                    DMA_TO_DEVICE);
 508
 509                         if (unlikely(dma_mapping_error(aq_nic_get_dev(self),
 510                                                        frag_pa)))
 511                                 goto mapping_error;
 512
 513                         dx = aq_ring_next_dx(ring, dx);
 514                         dx_buff = &ring->buff_ring[dx];
 515
 516                         dx_buff->flags = 0U;
 517                         dx_buff->len = buff_size;
 518                         dx_buff->pa = frag_pa;
 519                         dx_buff->is_mapped = 1U;
 520                         dx_buff->eop_index = 0xffffU;
 521
 522                         frag_len -= buff_size;
 523                         buff_offset += buff_size;
 524
 525                         ++ret;
 526                 }
 527         }
 528
 529         first->eop_index = dx;
 530         dx_buff->is_eop = 1U;
 531         dx_buff->skb = skb;
 532         goto exit;
 533
 534 mapping_error:
 535         for (dx = ring->sw_tail;
 536              ret > 0;
 537              --ret, dx = aq_ring_next_dx(ring, dx)) {
 538                 dx_buff = &ring->buff_ring[dx];
 539
 540                 if (!dx_buff->is_txc && dx_buff->pa) {
 541                         if (unlikely(dx_buff->is_sop)) {
 542                                 dma_unmap_single(aq_nic_get_dev(self),
 543                                                  dx_buff->pa,
 544                                                  dx_buff->len,
 545                                                  DMA_TO_DEVICE);
 546                         } else {
 547                                 dma_unmap_page(aq_nic_get_dev(self),
 548                                                dx_buff->pa,
 549                                                dx_buff->len,
 550                                                DMA_TO_DEVICE);
 551                         }
 552                 }
 553         }
 554
 555 exit:
 556         return ret;
 557 }
 558
 559 int aq_nic_xmit(struct aq_nic_s *self, struct sk_buff *skb)
 560 {
 561         struct aq_ring_s *ring = NULL;
 562         unsigned int frags = 0U;
 563         unsigned int vec = skb->queue_mapping % self->aq_nic_cfg.vecs;
 564         unsigned int tc = 0U;
 565         int err = NETDEV_TX_OK;
 566
 567         frags = skb_shinfo(skb)->nr_frags + 1;
 568
 569         ring = self->aq_ring_tx[AQ_NIC_TCVEC2RING(self, tc, vec)];
 570
 571         if (frags > AQ_CFG_SKB_FRAGS_MAX) {
 572                 dev_kfree_skb_any(skb);
 573                 goto err_exit;
 574         }
 575
 576         aq_ring_update_queue_state(ring);
 577
 578         /* Above status update may stop the queue. Check this. */
 579         if (__netif_subqueue_stopped(self->ndev, ring->idx)) {
 580                 err = NETDEV_TX_BUSY;
 581                 goto err_exit;
 582         }
 583
 584         frags = aq_nic_map_skb(self, skb, ring);
 585
 586         if (likely(frags)) {
 587                 err = self->aq_hw_ops->hw_ring_tx_xmit(self->aq_hw,
 588                                                        ring, frags);
 589                 if (err >= 0) {
 590                         ++ring->stats.tx.packets;
 591                         ring->stats.tx.bytes += skb->len;
 592                 }
 593         } else {
 594                 err = NETDEV_TX_BUSY;
 595         }
 596
 597 err_exit:
 598         return err;
 599 }
 600
 601 int aq_nic_update_interrupt_moderation_settings(struct aq_nic_s *self)
 602 {
 603         return self->aq_hw_ops->hw_interrupt_moderation_set(self->aq_hw);
 604 }
 605
 606 int aq_nic_set_packet_filter(struct aq_nic_s *self, unsigned int flags)
 607 {
 608         int err = 0;
 609
 610         err = self->aq_hw_ops->hw_packet_filter_set(self->aq_hw, flags);
 611         if (err < 0)
 612                 goto err_exit;
 613
 614         self->packet_filter = flags;
 615
 616 err_exit:
 617         return err;
 618 }
 619
 620 int aq_nic_set_multicast_list(struct aq_nic_s *self, struct net_device *ndev)
 621 {
 622         unsigned int packet_filter = self->packet_filter;
 623         struct netdev_hw_addr *ha = NULL;
 624         unsigned int i = 0U;
 625
 626         self->mc_list.count = 0;
 627         if (netdev_uc_count(ndev) > AQ_HW_MULTICAST_ADDRESS_MAX) {
 628                 packet_filter |= IFF_PROMISC;
 629         } else {
 630                 netdev_for_each_uc_addr(ha, ndev) {
 631                         ether_addr_copy(self->mc_list.ar[i++], ha->addr);
 632
 633                         if (i >= AQ_HW_MULTICAST_ADDRESS_MAX)
 634                                 break;
 635                 }
 636         }
 637
 638         if (i + netdev_mc_count(ndev) > AQ_HW_MULTICAST_ADDRESS_MAX) {
 639                 packet_filter |= IFF_ALLMULTI;
 640         } else {
 641                 netdev_for_each_mc_addr(ha, ndev) {
 642                         ether_addr_copy(self->mc_list.ar[i++], ha->addr);
 643
 644                         if (i >= AQ_HW_MULTICAST_ADDRESS_MAX)
 645                                 break;
 646                 }
 647         }
 648
 649         if (i > 0 && i <= AQ_HW_MULTICAST_ADDRESS_MAX) {
 650                 packet_filter |= IFF_MULTICAST;
 651                 self->mc_list.count = i;
 652                 self->aq_hw_ops->hw_multicast_list_set(self->aq_hw,
 653                                                        self->mc_list.ar,
 654                                                        self->mc_list.count);
 655         }
 656         return aq_nic_set_packet_filter(self, packet_filter);
 657 }
 658
 659 int aq_nic_set_mtu(struct aq_nic_s *self, int new_mtu)
 660 {
 661         self->aq_nic_cfg.mtu = new_mtu;
 662
 663         return 0;
 664 }
 665
 666 int aq_nic_set_mac(struct aq_nic_s *self, struct net_device *ndev)
 667 {
 668         return self->aq_hw_ops->hw_set_mac_address(self->aq_hw, ndev->dev_addr);
 669 }
 670
 671 unsigned int aq_nic_get_link_speed(struct aq_nic_s *self)
 672 {
 673         return self->link_status.mbps;
 674 }
 675
 676 int aq_nic_get_regs(struct aq_nic_s *self, struct ethtool_regs *regs, void *p)
 677 {
 678         u32 *regs_buff = p;
 679         int err = 0;
 680
 681         regs->version = 1;
 682
 683         err = self->aq_hw_ops->hw_get_regs(self->aq_hw,
 684                                            self->aq_nic_cfg.aq_hw_caps,
 685                                            regs_buff);
 686         if (err < 0)
 687                 goto err_exit;
 688
 689 err_exit:
 690         return err;
 691 }
 692
 693 int aq_nic_get_regs_count(struct aq_nic_s *self)
 694 {
 695         return self->aq_nic_cfg.aq_hw_caps->mac_regs_count;
 696 }
 697
 698 void aq_nic_get_stats(struct aq_nic_s *self, u64 *data)
 699 {
 700         unsigned int i = 0U;
 701         unsigned int count = 0U;
 702         struct aq_vec_s *aq_vec = NULL;
 703         struct aq_stats_s *stats;
 704
 705         if (self->aq_fw_ops->update_stats) {
 706                 mutex_lock(&self->fwreq_mutex);
 707                 self->aq_fw_ops->update_stats(self->aq_hw);
 708                 mutex_unlock(&self->fwreq_mutex);
 709         }
 710         stats = self->aq_hw_ops->hw_get_hw_stats(self->aq_hw);
 711
 712         if (!stats)
 713                 goto err_exit;
 714
 715         data[i] = stats->uprc + stats->mprc + stats->bprc;
 716         data[++i] = stats->uprc;
 717         data[++i] = stats->mprc;
 718         data[++i] = stats->bprc;
 719         data[++i] = stats->erpt;
 720         data[++i] = stats->uptc + stats->mptc + stats->bptc;
 721         data[++i] = stats->uptc;
 722         data[++i] = stats->mptc;
 723         data[++i] = stats->bptc;
 724         data[++i] = stats->ubrc;
 725         data[++i] = stats->ubtc;
 726         data[++i] = stats->mbrc;
 727         data[++i] = stats->mbtc;
 728         data[++i] = stats->bbrc;
 729         data[++i] = stats->bbtc;
 730         data[++i] = stats->ubrc + stats->mbrc + stats->bbrc;
 731         data[++i] = stats->ubtc + stats->mbtc + stats->bbtc;
 732         data[++i] = stats->dma_pkt_rc;
 733         data[++i] = stats->dma_pkt_tc;
 734         data[++i] = stats->dma_oct_rc;
 735         data[++i] = stats->dma_oct_tc;
 736         data[++i] = stats->dpc;
 737
 738         i++;
 739
 740         data += i;
 741
 742         for (i = 0U, aq_vec = self->aq_vec[0];
 743                 aq_vec && 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 }
 750
 751 static void aq_nic_update_ndev_stats(struct aq_nic_s *self)
 752 {
 753         struct net_device *ndev = self->ndev;
 754         struct aq_stats_s *stats = self->aq_hw_ops->hw_get_hw_stats(self->aq_hw);
 755
 756         ndev->stats.rx_packets = stats->dma_pkt_rc;
 757         ndev->stats.rx_bytes = stats->dma_oct_rc;
 758         ndev->stats.rx_errors = stats->erpr;
 759         ndev->stats.rx_dropped = stats->dpc;
 760         ndev->stats.tx_packets = stats->dma_pkt_tc;
 761         ndev->stats.tx_bytes = stats->dma_oct_tc;
 762         ndev->stats.tx_errors = stats->erpt;
 763         ndev->stats.multicast = stats->mprc;
 764 }
 765
 766 void aq_nic_get_link_ksettings(struct aq_nic_s *self,
 767                                struct ethtool_link_ksettings *cmd)
 768 {
 769         if (self->aq_nic_cfg.aq_hw_caps->media_type == AQ_HW_MEDIA_TYPE_FIBRE)
 770                 cmd->base.port = PORT_FIBRE;
 771         else
 772                 cmd->base.port = PORT_TP;
 773         /* This driver supports only 10G capable adapters, so DUPLEX_FULL */
 774         cmd->base.duplex = DUPLEX_FULL;
 775         cmd->base.autoneg = self->aq_nic_cfg.is_autoneg;
 776
 777         ethtool_link_ksettings_zero_link_mode(cmd, supported);
 778
 779         if (self->aq_nic_cfg.aq_hw_caps->link_speed_msk & AQ_NIC_RATE_10G)
 780                 ethtool_link_ksettings_add_link_mode(cmd, supported,
 781                                                      10000baseT_Full);
 782
 783         if (self->aq_nic_cfg.aq_hw_caps->link_speed_msk & AQ_NIC_RATE_5G)
 784                 ethtool_link_ksettings_add_link_mode(cmd, supported,
 785                                                      5000baseT_Full);
 786
 787         if (self->aq_nic_cfg.aq_hw_caps->link_speed_msk & AQ_NIC_RATE_2GS)
 788                 ethtool_link_ksettings_add_link_mode(cmd, supported,
 789                                                      2500baseT_Full);
 790
 791         if (self->aq_nic_cfg.aq_hw_caps->link_speed_msk & AQ_NIC_RATE_1G)
 792                 ethtool_link_ksettings_add_link_mode(cmd, supported,
 793                                                      1000baseT_Full);
 794
 795         if (self->aq_nic_cfg.aq_hw_caps->link_speed_msk & AQ_NIC_RATE_100M)
 796                 ethtool_link_ksettings_add_link_mode(cmd, supported,
 797                                                      100baseT_Full);
 798
 799         if (self->aq_nic_cfg.aq_hw_caps->flow_control)
 800                 ethtool_link_ksettings_add_link_mode(cmd, supported,
 801                                                      Pause);
 802
 803         ethtool_link_ksettings_add_link_mode(cmd, supported, Autoneg);
 804
 805         if (self->aq_nic_cfg.aq_hw_caps->media_type == AQ_HW_MEDIA_TYPE_FIBRE)
 806                 ethtool_link_ksettings_add_link_mode(cmd, supported, FIBRE);
 807         else
 808                 ethtool_link_ksettings_add_link_mode(cmd, supported, TP);
 809
 810         ethtool_link_ksettings_zero_link_mode(cmd, advertising);
 811
 812         if (self->aq_nic_cfg.is_autoneg)
 813                 ethtool_link_ksettings_add_link_mode(cmd, advertising, Autoneg);
 814
 815         if (self->aq_nic_cfg.link_speed_msk  & AQ_NIC_RATE_10G)
 816                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
 817                                                      10000baseT_Full);
 818
 819         if (self->aq_nic_cfg.link_speed_msk  & AQ_NIC_RATE_5G)
 820                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
 821                                                      5000baseT_Full);
 822
 823         if (self->aq_nic_cfg.link_speed_msk  & AQ_NIC_RATE_2GS)
 824                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
 825                                                      2500baseT_Full);
 826
 827         if (self->aq_nic_cfg.link_speed_msk  & AQ_NIC_RATE_1G)
 828                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
 829                                                      1000baseT_Full);
 830
 831         if (self->aq_nic_cfg.link_speed_msk  & AQ_NIC_RATE_100M)
 832                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
 833                                                      100baseT_Full);
 834
 835         if (self->aq_nic_cfg.flow_control & AQ_NIC_FC_RX)
 836                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
 837                                                      Pause);
 838
 839         /* Asym is when either RX or TX, but not both */
 840         if (!!(self->aq_nic_cfg.flow_control & AQ_NIC_FC_TX) ^
 841             !!(self->aq_nic_cfg.flow_control & AQ_NIC_FC_RX))
 842                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
 843                                                      Asym_Pause);
 844
 845         if (self->aq_nic_cfg.aq_hw_caps->media_type == AQ_HW_MEDIA_TYPE_FIBRE)
 846                 ethtool_link_ksettings_add_link_mode(cmd, advertising, FIBRE);
 847         else
 848                 ethtool_link_ksettings_add_link_mode(cmd, advertising, TP);
 849 }
 850
 851 int aq_nic_set_link_ksettings(struct aq_nic_s *self,
 852                               const struct ethtool_link_ksettings *cmd)
 853 {
 854         u32 speed = 0U;
 855         u32 rate = 0U;
 856         int err = 0;
 857
 858         if (cmd->base.autoneg == AUTONEG_ENABLE) {
 859                 rate = self->aq_nic_cfg.aq_hw_caps->link_speed_msk;
 860                 self->aq_nic_cfg.is_autoneg = true;
 861         } else {
 862                 speed = cmd->base.speed;
 863
 864                 switch (speed) {
 865                 case SPEED_100:
 866                         rate = AQ_NIC_RATE_100M;
 867                         break;
 868
 869                 case SPEED_1000:
 870                         rate = AQ_NIC_RATE_1G;
 871                         break;
 872
 873                 case SPEED_2500:
 874                         rate = AQ_NIC_RATE_2GS;
 875                         break;
 876
 877                 case SPEED_5000:
 878                         rate = AQ_NIC_RATE_5G;
 879                         break;
 880
 881                 case SPEED_10000:
 882                         rate = AQ_NIC_RATE_10G;
 883                         break;
 884
 885                 default:
 886                         err = -1;
 887                         goto err_exit;
 888                 break;
 889                 }
 890                 if (!(self->aq_nic_cfg.aq_hw_caps->link_speed_msk & rate)) {
 891                         err = -1;
 892                         goto err_exit;
 893                 }
 894
 895                 self->aq_nic_cfg.is_autoneg = false;
 896         }
 897
 898         mutex_lock(&self->fwreq_mutex);
 899         err = self->aq_fw_ops->set_link_speed(self->aq_hw, rate);
 900         mutex_unlock(&self->fwreq_mutex);
 901         if (err < 0)
 902                 goto err_exit;
 903
 904         self->aq_nic_cfg.link_speed_msk = rate;
 905
 906 err_exit:
 907         return err;
 908 }
 909
 910 struct aq_nic_cfg_s *aq_nic_get_cfg(struct aq_nic_s *self)
 911 {
 912         return &self->aq_nic_cfg;
 913 }
 914
 915 u32 aq_nic_get_fw_version(struct aq_nic_s *self)
 916 {
 917         u32 fw_version = 0U;
 918
 919         self->aq_hw_ops->hw_get_fw_version(self->aq_hw, &fw_version);
 920
 921         return fw_version;
 922 }
 923
 924 int aq_nic_stop(struct aq_nic_s *self)
 925 {
 926         struct aq_vec_s *aq_vec = NULL;
 927         unsigned int i = 0U;
 928
 929         netif_tx_disable(self->ndev);
 930         netif_carrier_off(self->ndev);
 931
 932         del_timer_sync(&self->service_timer);
 933         cancel_work_sync(&self->service_task);
 934
 935         self->aq_hw_ops->hw_irq_disable(self->aq_hw, AQ_CFG_IRQ_MASK);
 936
 937         if (self->aq_nic_cfg.is_polling)
 938                 del_timer_sync(&self->polling_timer);
 939         else
 940                 aq_pci_func_free_irqs(self);
 941
 942         for (i = 0U, aq_vec = self->aq_vec[0];
 943                 self->aq_vecs > i; ++i, aq_vec = self->aq_vec[i])
 944                 aq_vec_stop(aq_vec);
 945
 946         return self->aq_hw_ops->hw_stop(self->aq_hw);
 947 }
 948
 949 void aq_nic_deinit(struct aq_nic_s *self)
 950 {
 951         struct aq_vec_s *aq_vec = NULL;
 952         unsigned int i = 0U;
 953
 954         if (!self)
 955                 goto err_exit;
 956
 957         for (i = 0U, aq_vec = self->aq_vec[0];
 958                 self->aq_vecs > i; ++i, aq_vec = self->aq_vec[i])
 959                 aq_vec_deinit(aq_vec);
 960
 961         if (likely(self->aq_fw_ops->deinit)) {
 962                 mutex_lock(&self->fwreq_mutex);
 963                 self->aq_fw_ops->deinit(self->aq_hw);
 964                 mutex_unlock(&self->fwreq_mutex);
 965         }
 966
 967         if (self->power_state != AQ_HW_POWER_STATE_D0 ||
 968             self->aq_hw->aq_nic_cfg->wol)
 969                 if (likely(self->aq_fw_ops->set_power)) {
 970                         mutex_lock(&self->fwreq_mutex);
 971                         self->aq_fw_ops->set_power(self->aq_hw,
 972                                                    self->power_state,
 973                                                    self->ndev->dev_addr);
 974                         mutex_unlock(&self->fwreq_mutex);
 975                 }
 976
 977
 978 err_exit:;
 979 }
 980
 981 void aq_nic_free_vectors(struct aq_nic_s *self)
 982 {
 983         unsigned int i = 0U;
 984
 985         if (!self)
 986                 goto err_exit;
 987
 988         for (i = ARRAY_SIZE(self->aq_vec); i--;) {
 989                 if (self->aq_vec[i]) {
 990                         aq_vec_free(self->aq_vec[i]);
 991                         self->aq_vec[i] = NULL;
 992                 }
 993         }
 994
 995 err_exit:;
 996 }
 997
 998 int aq_nic_change_pm_state(struct aq_nic_s *self, pm_message_t *pm_msg)
 999 {
1000         int err = 0;
1001
1002         if (!netif_running(self->ndev)) {
1003                 err = 0;
1004                 goto out;
1005         }
1006         rtnl_lock();
1007         if (pm_msg->event & PM_EVENT_SLEEP || pm_msg->event & PM_EVENT_FREEZE) {
1008                 self->power_state = AQ_HW_POWER_STATE_D3;
1009                 netif_device_detach(self->ndev);
1010                 netif_tx_stop_all_queues(self->ndev);
1011
1012                 err = aq_nic_stop(self);
1013                 if (err < 0)
1014                         goto err_exit;
1015
1016                 aq_nic_deinit(self);
1017         } else {
1018                 err = aq_nic_init(self);
1019                 if (err < 0)
1020                         goto err_exit;
1021
1022                 err = aq_nic_start(self);
1023                 if (err < 0)
1024                         goto err_exit;
1025
1026                 netif_device_attach(self->ndev);
1027                 netif_tx_start_all_queues(self->ndev);
1028         }
1029
1030 err_exit:
1031         rtnl_unlock();
1032 out:
1033         return err;
1034 }
1035
1036 void aq_nic_shutdown(struct aq_nic_s *self)
1037 {
1038         int err = 0;
1039
1040         if (!self->ndev)
1041                 return;
1042
1043         rtnl_lock();
1044
1045         netif_device_detach(self->ndev);
1046
1047         if (netif_running(self->ndev)) {
1048                 err = aq_nic_stop(self);
1049                 if (err < 0)
1050                         goto err_exit;
1051         }
1052         aq_nic_deinit(self);
1053
1054 err_exit:
1055         rtnl_unlock();
1056 }