drivers/net/ethernet/aquantia/atlantic/aq_nic.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * aQuantia Corporation Network Driver
   4  * Copyright (C) 2014-2017 aQuantia Corporation. All rights reserved
   5  */
   6
   7 /* File aq_nic.c: Definition of common code for NIC. */
   8
   9 #include "aq_nic.h"
  10 #include "aq_ring.h"
  11 #include "aq_vec.h"
  12 #include "aq_hw.h"
  13 #include "aq_pci_func.h"
  14 #include "aq_main.h"
  15
  16 #include <linux/moduleparam.h>
  17 #include <linux/netdevice.h>
  18 #include <linux/etherdevice.h>
  19 #include <linux/timer.h>
  20 #include <linux/cpu.h>
  21 #include <linux/ip.h>
  22 #include <linux/tcp.h>
  23 #include <net/ip.h>
  24
  25 static unsigned int aq_itr = AQ_CFG_INTERRUPT_MODERATION_AUTO;
  26 module_param_named(aq_itr, aq_itr, uint, 0644);
  27 MODULE_PARM_DESC(aq_itr, "Interrupt throttling mode");
  28
  29 static unsigned int aq_itr_tx;
  30 module_param_named(aq_itr_tx, aq_itr_tx, uint, 0644);
  31 MODULE_PARM_DESC(aq_itr_tx, "TX interrupt throttle rate");
  32
  33 static unsigned int aq_itr_rx;
  34 module_param_named(aq_itr_rx, aq_itr_rx, uint, 0644);
  35 MODULE_PARM_DESC(aq_itr_rx, "RX interrupt throttle rate");
  36
  37 static void aq_nic_update_ndev_stats(struct aq_nic_s *self);
  38
  39 static void aq_nic_rss_init(struct aq_nic_s *self, unsigned int num_rss_queues)
  40 {
  41         struct aq_nic_cfg_s *cfg = &self->aq_nic_cfg;
  42         struct aq_rss_parameters *rss_params = &cfg->aq_rss;
  43         int i = 0;
  44
  45         static u8 rss_key[AQ_CFG_RSS_HASHKEY_SIZE] = {
  46                 0x1e, 0xad, 0x71, 0x87, 0x65, 0xfc, 0x26, 0x7d,
  47                 0x0d, 0x45, 0x67, 0x74, 0xcd, 0x06, 0x1a, 0x18,
  48                 0xb6, 0xc1, 0xf0, 0xc7, 0xbb, 0x18, 0xbe, 0xf8,
  49                 0x19, 0x13, 0x4b, 0xa9, 0xd0, 0x3e, 0xfe, 0x70,
  50                 0x25, 0x03, 0xab, 0x50, 0x6a, 0x8b, 0x82, 0x0c
  51         };
  52
  53         rss_params->hash_secret_key_size = sizeof(rss_key);
  54         memcpy(rss_params->hash_secret_key, rss_key, sizeof(rss_key));
  55         rss_params->indirection_table_size = AQ_CFG_RSS_INDIRECTION_TABLE_MAX;
  56
  57         for (i = rss_params->indirection_table_size; i--;)
  58                 rss_params->indirection_table[i] = i & (num_rss_queues - 1);
  59 }
  60
  61 /* Checks hw_caps and 'corrects' aq_nic_cfg in runtime */
  62 void aq_nic_cfg_start(struct aq_nic_s *self)
  63 {
  64         struct aq_nic_cfg_s *cfg = &self->aq_nic_cfg;
  65
  66         cfg->tcs = AQ_CFG_TCS_DEF;
  67
  68         cfg->is_polling = AQ_CFG_IS_POLLING_DEF;
  69
  70         cfg->itr = aq_itr;
  71         cfg->tx_itr = aq_itr_tx;
  72         cfg->rx_itr = aq_itr_rx;
  73
  74         cfg->rxpageorder = AQ_CFG_RX_PAGEORDER;
  75         cfg->is_rss = AQ_CFG_IS_RSS_DEF;
  76         cfg->num_rss_queues = AQ_CFG_NUM_RSS_QUEUES_DEF;
  77         cfg->aq_rss.base_cpu_number = AQ_CFG_RSS_BASE_CPU_NUM_DEF;
  78         cfg->flow_control = AQ_CFG_FC_MODE;
  79
  80         cfg->mtu = AQ_CFG_MTU_DEF;
  81         cfg->link_speed_msk = AQ_CFG_SPEED_MSK;
  82         cfg->is_autoneg = AQ_CFG_IS_AUTONEG_DEF;
  83
  84         cfg->is_lro = AQ_CFG_IS_LRO_DEF;
  85
  86         /*descriptors */
  87         cfg->rxds = min(cfg->aq_hw_caps->rxds_max, AQ_CFG_RXDS_DEF);
  88         cfg->txds = min(cfg->aq_hw_caps->txds_max, AQ_CFG_TXDS_DEF);
  89
  90         /*rss rings */
  91         cfg->vecs = min(cfg->aq_hw_caps->vecs, AQ_CFG_VECS_DEF);
  92         cfg->vecs = min(cfg->vecs, num_online_cpus());
  93         if (self->irqvecs > AQ_HW_SERVICE_IRQS)
  94                 cfg->vecs = min(cfg->vecs, self->irqvecs - AQ_HW_SERVICE_IRQS);
  95         /* cfg->vecs should be power of 2 for RSS */
  96         if (cfg->vecs >= 8U)
  97                 cfg->vecs = 8U;
  98         else if (cfg->vecs >= 4U)
  99                 cfg->vecs = 4U;
 100         else if (cfg->vecs >= 2U)
 101                 cfg->vecs = 2U;
 102         else
 103                 cfg->vecs = 1U;
 104
 105         cfg->num_rss_queues = min(cfg->vecs, AQ_CFG_NUM_RSS_QUEUES_DEF);
 106
 107         aq_nic_rss_init(self, cfg->num_rss_queues);
 108
 109         cfg->irq_type = aq_pci_func_get_irq_type(self);
 110
 111         if ((cfg->irq_type == AQ_HW_IRQ_LEGACY) ||
 112             (cfg->aq_hw_caps->vecs == 1U) ||
 113             (cfg->vecs == 1U)) {
 114                 cfg->is_rss = 0U;
 115                 cfg->vecs = 1U;
 116         }
 117
 118         /* Check if we have enough vectors allocated for
 119          * link status IRQ. If no - we'll know link state from
 120          * slower service task.
 121          */
 122         if (AQ_HW_SERVICE_IRQS > 0 && cfg->vecs + 1 <= self->irqvecs)
 123                 cfg->link_irq_vec = cfg->vecs;
 124         else
 125                 cfg->link_irq_vec = 0;
 126
 127         cfg->link_speed_msk &= cfg->aq_hw_caps->link_speed_msk;
 128         cfg->features = cfg->aq_hw_caps->hw_features;
 129         cfg->is_vlan_force_promisc = true;
 130 }
 131
 132 static int aq_nic_update_link_status(struct aq_nic_s *self)
 133 {
 134         int err = self->aq_fw_ops->update_link_status(self->aq_hw);
 135         u32 fc = 0;
 136
 137         if (err)
 138                 return err;
 139
 140         if (self->link_status.mbps != self->aq_hw->aq_link_status.mbps) {
 141                 pr_info("%s: link change old %d new %d\n",
 142                         AQ_CFG_DRV_NAME, self->link_status.mbps,
 143                         self->aq_hw->aq_link_status.mbps);
 144                 aq_nic_update_interrupt_moderation_settings(self);
 145
 146                 /* Driver has to update flow control settings on RX block
 147                  * on any link event.
 148                  * We should query FW whether it negotiated FC.
 149                  */
 150                 if (self->aq_fw_ops->get_flow_control)
 151                         self->aq_fw_ops->get_flow_control(self->aq_hw, &fc);
 152                 if (self->aq_hw_ops->hw_set_fc)
 153                         self->aq_hw_ops->hw_set_fc(self->aq_hw, fc, 0);
 154         }
 155
 156         self->link_status = self->aq_hw->aq_link_status;
 157         if (!netif_carrier_ok(self->ndev) && self->link_status.mbps) {
 158                 aq_utils_obj_set(&self->flags,
 159                                  AQ_NIC_FLAG_STARTED);
 160                 aq_utils_obj_clear(&self->flags,
 161                                    AQ_NIC_LINK_DOWN);
 162                 netif_carrier_on(self->ndev);
 163                 netif_tx_wake_all_queues(self->ndev);
 164         }
 165         if (netif_carrier_ok(self->ndev) && !self->link_status.mbps) {
 166                 netif_carrier_off(self->ndev);
 167                 netif_tx_disable(self->ndev);
 168                 aq_utils_obj_set(&self->flags, AQ_NIC_LINK_DOWN);
 169         }
 170         return 0;
 171 }
 172
 173 static irqreturn_t aq_linkstate_threaded_isr(int irq, void *private)
 174 {
 175         struct aq_nic_s *self = private;
 176
 177         if (!self)
 178                 return IRQ_NONE;
 179
 180         aq_nic_update_link_status(self);
 181
 182         self->aq_hw_ops->hw_irq_enable(self->aq_hw,
 183                                        BIT(self->aq_nic_cfg.link_irq_vec));
 184         return IRQ_HANDLED;
 185 }
 186
 187 static void aq_nic_service_task(struct work_struct *work)
 188 {
 189         struct aq_nic_s *self = container_of(work, struct aq_nic_s,
 190                                              service_task);
 191         int err;
 192
 193         if (aq_utils_obj_test(&self->flags, AQ_NIC_FLAGS_IS_NOT_READY))
 194                 return;
 195
 196         err = aq_nic_update_link_status(self);
 197         if (err)
 198                 return;
 199
 200         mutex_lock(&self->fwreq_mutex);
 201         if (self->aq_fw_ops->update_stats)
 202                 self->aq_fw_ops->update_stats(self->aq_hw);
 203         mutex_unlock(&self->fwreq_mutex);
 204
 205         aq_nic_update_ndev_stats(self);
 206 }
 207
 208 static void aq_nic_service_timer_cb(struct timer_list *t)
 209 {
 210         struct aq_nic_s *self = from_timer(self, t, service_timer);
 211
 212         mod_timer(&self->service_timer, jiffies + AQ_CFG_SERVICE_TIMER_INTERVAL);
 213
 214         aq_ndev_schedule_work(&self->service_task);
 215 }
 216
 217 static void aq_nic_polling_timer_cb(struct timer_list *t)
 218 {
 219         struct aq_nic_s *self = from_timer(self, t, polling_timer);
 220         struct aq_vec_s *aq_vec = NULL;
 221         unsigned int i = 0U;
 222
 223         for (i = 0U, aq_vec = self->aq_vec[0];
 224                 self->aq_vecs > i; ++i, aq_vec = self->aq_vec[i])
 225                 aq_vec_isr(i, (void *)aq_vec);
 226
 227         mod_timer(&self->polling_timer, jiffies +
 228                   AQ_CFG_POLLING_TIMER_INTERVAL);
 229 }
 230
 231 int aq_nic_ndev_register(struct aq_nic_s *self)
 232 {
 233         int err = 0;
 234
 235         if (!self->ndev) {
 236                 err = -EINVAL;
 237                 goto err_exit;
 238         }
 239
 240         err = hw_atl_utils_initfw(self->aq_hw, &self->aq_fw_ops);
 241         if (err)
 242                 goto err_exit;
 243
 244         mutex_lock(&self->fwreq_mutex);
 245         err = self->aq_fw_ops->get_mac_permanent(self->aq_hw,
 246                             self->ndev->dev_addr);
 247         mutex_unlock(&self->fwreq_mutex);
 248         if (err)
 249                 goto err_exit;
 250
 251 #if defined(AQ_CFG_MAC_ADDR_PERMANENT)
 252         {
 253                 static u8 mac_addr_permanent[] = AQ_CFG_MAC_ADDR_PERMANENT;
 254
 255                 ether_addr_copy(self->ndev->dev_addr, mac_addr_permanent);
 256         }
 257 #endif
 258
 259         for (self->aq_vecs = 0; self->aq_vecs < aq_nic_get_cfg(self)->vecs;
 260              self->aq_vecs++) {
 261                 self->aq_vec[self->aq_vecs] =
 262                     aq_vec_alloc(self, self->aq_vecs, aq_nic_get_cfg(self));
 263                 if (!self->aq_vec[self->aq_vecs]) {
 264                         err = -ENOMEM;
 265                         goto err_exit;
 266                 }
 267         }
 268
 269         netif_carrier_off(self->ndev);
 270
 271         netif_tx_disable(self->ndev);
 272
 273         err = register_netdev(self->ndev);
 274         if (err)
 275                 goto err_exit;
 276
 277 err_exit:
 278         return err;
 279 }
 280
 281 void aq_nic_ndev_init(struct aq_nic_s *self)
 282 {
 283         const struct aq_hw_caps_s *aq_hw_caps = self->aq_nic_cfg.aq_hw_caps;
 284         struct aq_nic_cfg_s *aq_nic_cfg = &self->aq_nic_cfg;
 285
 286         self->ndev->hw_features |= aq_hw_caps->hw_features;
 287         self->ndev->features = aq_hw_caps->hw_features;
 288         self->ndev->vlan_features |= NETIF_F_HW_CSUM | NETIF_F_RXCSUM |
 289                                      NETIF_F_RXHASH | NETIF_F_SG | NETIF_F_LRO;
 290         self->ndev->priv_flags = aq_hw_caps->hw_priv_flags;
 291         self->ndev->priv_flags |= IFF_LIVE_ADDR_CHANGE;
 292
 293         self->ndev->mtu = aq_nic_cfg->mtu - ETH_HLEN;
 294         self->ndev->max_mtu = aq_hw_caps->mtu - ETH_FCS_LEN - ETH_HLEN;
 295
 296 }
 297
 298 void aq_nic_set_tx_ring(struct aq_nic_s *self, unsigned int idx,
 299                         struct aq_ring_s *ring)
 300 {
 301         self->aq_ring_tx[idx] = ring;
 302 }
 303
 304 struct net_device *aq_nic_get_ndev(struct aq_nic_s *self)
 305 {
 306         return self->ndev;
 307 }
 308
 309 int aq_nic_init(struct aq_nic_s *self)
 310 {
 311         struct aq_vec_s *aq_vec = NULL;
 312         int err = 0;
 313         unsigned int i = 0U;
 314
 315         self->power_state = AQ_HW_POWER_STATE_D0;
 316         mutex_lock(&self->fwreq_mutex);
 317         err = self->aq_hw_ops->hw_reset(self->aq_hw);
 318         mutex_unlock(&self->fwreq_mutex);
 319         if (err < 0)
 320                 goto err_exit;
 321
 322         err = self->aq_hw_ops->hw_init(self->aq_hw,
 323                                        aq_nic_get_ndev(self)->dev_addr);
 324         if (err < 0)
 325                 goto err_exit;
 326
 327         for (i = 0U, aq_vec = self->aq_vec[0];
 328                 self->aq_vecs > i; ++i, aq_vec = self->aq_vec[i])
 329                 aq_vec_init(aq_vec, self->aq_hw_ops, self->aq_hw);
 330
 331         netif_carrier_off(self->ndev);
 332
 333 err_exit:
 334         return err;
 335 }
 336
 337 int aq_nic_start(struct aq_nic_s *self)
 338 {
 339         struct aq_vec_s *aq_vec = NULL;
 340         int err = 0;
 341         unsigned int i = 0U;
 342
 343         err = self->aq_hw_ops->hw_multicast_list_set(self->aq_hw,
 344                                                      self->mc_list.ar,
 345                                                      self->mc_list.count);
 346         if (err < 0)
 347                 goto err_exit;
 348
 349         err = self->aq_hw_ops->hw_packet_filter_set(self->aq_hw,
 350                                                     self->packet_filter);
 351         if (err < 0)
 352                 goto err_exit;
 353
 354         for (i = 0U, aq_vec = self->aq_vec[0];
 355                 self->aq_vecs > i; ++i, aq_vec = self->aq_vec[i]) {
 356                 err = aq_vec_start(aq_vec);
 357                 if (err < 0)
 358                         goto err_exit;
 359         }
 360
 361         err = self->aq_hw_ops->hw_start(self->aq_hw);
 362         if (err < 0)
 363                 goto err_exit;
 364
 365         err = aq_nic_update_interrupt_moderation_settings(self);
 366         if (err)
 367                 goto err_exit;
 368
 369         INIT_WORK(&self->service_task, aq_nic_service_task);
 370
 371         timer_setup(&self->service_timer, aq_nic_service_timer_cb, 0);
 372         aq_nic_service_timer_cb(&self->service_timer);
 373
 374         if (self->aq_nic_cfg.is_polling) {
 375                 timer_setup(&self->polling_timer, aq_nic_polling_timer_cb, 0);
 376                 mod_timer(&self->polling_timer, jiffies +
 377                           AQ_CFG_POLLING_TIMER_INTERVAL);
 378         } else {
 379                 for (i = 0U, aq_vec = self->aq_vec[0];
 380                         self->aq_vecs > i; ++i, aq_vec = self->aq_vec[i]) {
 381                         err = aq_pci_func_alloc_irq(self, i, self->ndev->name,
 382                                                     aq_vec_isr, aq_vec,
 383                                                     aq_vec_get_affinity_mask(aq_vec));
 384                         if (err < 0)
 385                                 goto err_exit;
 386                 }
 387
 388                 if (self->aq_nic_cfg.link_irq_vec) {
 389                         int irqvec = pci_irq_vector(self->pdev,
 390                                                    self->aq_nic_cfg.link_irq_vec);
 391                         err = request_threaded_irq(irqvec, NULL,
 392                                                    aq_linkstate_threaded_isr,
 393                                                    IRQF_SHARED,
 394                                                    self->ndev->name, self);
 395                         if (err < 0)
 396                                 goto err_exit;
 397                         self->msix_entry_mask |= (1 << self->aq_nic_cfg.link_irq_vec);
 398                 }
 399
 400                 err = self->aq_hw_ops->hw_irq_enable(self->aq_hw,
 401                                                      AQ_CFG_IRQ_MASK);
 402                 if (err < 0)
 403                         goto err_exit;
 404         }
 405
 406         err = netif_set_real_num_tx_queues(self->ndev, self->aq_vecs);
 407         if (err < 0)
 408                 goto err_exit;
 409
 410         err = netif_set_real_num_rx_queues(self->ndev, self->aq_vecs);
 411         if (err < 0)
 412                 goto err_exit;
 413
 414         netif_tx_start_all_queues(self->ndev);
 415
 416 err_exit:
 417         return err;
 418 }
 419
 420 static unsigned int aq_nic_map_skb(struct aq_nic_s *self,
 421                                    struct sk_buff *skb,
 422                                    struct aq_ring_s *ring)
 423 {
 424         unsigned int ret = 0U;
 425         unsigned int nr_frags = skb_shinfo(skb)->nr_frags;
 426         unsigned int frag_count = 0U;
 427         unsigned int dx = ring->sw_tail;
 428         struct aq_ring_buff_s *first = NULL;
 429         struct aq_ring_buff_s *dx_buff = &ring->buff_ring[dx];
 430
 431         if (unlikely(skb_is_gso(skb))) {
 432                 dx_buff->flags = 0U;
 433                 dx_buff->len_pkt = skb->len;
 434                 dx_buff->len_l2 = ETH_HLEN;
 435                 dx_buff->len_l3 = ip_hdrlen(skb);
 436                 dx_buff->len_l4 = tcp_hdrlen(skb);
 437                 dx_buff->mss = skb_shinfo(skb)->gso_size;
 438                 dx_buff->is_txc = 1U;
 439                 dx_buff->eop_index = 0xffffU;
 440
 441                 dx_buff->is_ipv6 =
 442                         (ip_hdr(skb)->version == 6) ? 1U : 0U;
 443
 444                 dx = aq_ring_next_dx(ring, dx);
 445                 dx_buff = &ring->buff_ring[dx];
 446                 ++ret;
 447         }
 448
 449         dx_buff->flags = 0U;
 450         dx_buff->len = skb_headlen(skb);
 451         dx_buff->pa = dma_map_single(aq_nic_get_dev(self),
 452                                      skb->data,
 453                                      dx_buff->len,
 454                                      DMA_TO_DEVICE);
 455
 456         if (unlikely(dma_mapping_error(aq_nic_get_dev(self), dx_buff->pa)))
 457                 goto exit;
 458
 459         first = dx_buff;
 460         dx_buff->len_pkt = skb->len;
 461         dx_buff->is_sop = 1U;
 462         dx_buff->is_mapped = 1U;
 463         ++ret;
 464
 465         if (skb->ip_summed == CHECKSUM_PARTIAL) {
 466                 dx_buff->is_ip_cso = (htons(ETH_P_IP) == skb->protocol) ?
 467                         1U : 0U;
 468
 469                 if (ip_hdr(skb)->version == 4) {
 470                         dx_buff->is_tcp_cso =
 471                                 (ip_hdr(skb)->protocol == IPPROTO_TCP) ?
 472                                         1U : 0U;
 473                         dx_buff->is_udp_cso =
 474                                 (ip_hdr(skb)->protocol == IPPROTO_UDP) ?
 475                                         1U : 0U;
 476                 } else if (ip_hdr(skb)->version == 6) {
 477                         dx_buff->is_tcp_cso =
 478                                 (ipv6_hdr(skb)->nexthdr == NEXTHDR_TCP) ?
 479                                         1U : 0U;
 480                         dx_buff->is_udp_cso =
 481                                 (ipv6_hdr(skb)->nexthdr == NEXTHDR_UDP) ?
 482                                         1U : 0U;
 483                 }
 484         }
 485
 486         for (; nr_frags--; ++frag_count) {
 487                 unsigned int frag_len = 0U;
 488                 unsigned int buff_offset = 0U;
 489                 unsigned int buff_size = 0U;
 490                 dma_addr_t frag_pa;
 491                 skb_frag_t *frag = &skb_shinfo(skb)->frags[frag_count];
 492
 493                 frag_len = skb_frag_size(frag);
 494
 495                 while (frag_len) {
 496                         if (frag_len > AQ_CFG_TX_FRAME_MAX)
 497                                 buff_size = AQ_CFG_TX_FRAME_MAX;
 498                         else
 499                                 buff_size = frag_len;
 500
 501                         frag_pa = skb_frag_dma_map(aq_nic_get_dev(self),
 502                                                    frag,
 503                                                    buff_offset,
 504                                                    buff_size,
 505                                                    DMA_TO_DEVICE);
 506
 507                         if (unlikely(dma_mapping_error(aq_nic_get_dev(self),
 508                                                        frag_pa)))
 509                                 goto mapping_error;
 510
 511                         dx = aq_ring_next_dx(ring, dx);
 512                         dx_buff = &ring->buff_ring[dx];
 513
 514                         dx_buff->flags = 0U;
 515                         dx_buff->len = buff_size;
 516                         dx_buff->pa = frag_pa;
 517                         dx_buff->is_mapped = 1U;
 518                         dx_buff->eop_index = 0xffffU;
 519
 520                         frag_len -= buff_size;
 521                         buff_offset += buff_size;
 522
 523                         ++ret;
 524                 }
 525         }
 526
 527         first->eop_index = dx;
 528         dx_buff->is_eop = 1U;
 529         dx_buff->skb = skb;
 530         goto exit;
 531
 532 mapping_error:
 533         for (dx = ring->sw_tail;
 534              ret > 0;
 535              --ret, dx = aq_ring_next_dx(ring, dx)) {
 536                 dx_buff = &ring->buff_ring[dx];
 537
 538                 if (!dx_buff->is_txc && dx_buff->pa) {
 539                         if (unlikely(dx_buff->is_sop)) {
 540                                 dma_unmap_single(aq_nic_get_dev(self),
 541                                                  dx_buff->pa,
 542                                                  dx_buff->len,
 543                                                  DMA_TO_DEVICE);
 544                         } else {
 545                                 dma_unmap_page(aq_nic_get_dev(self),
 546                                                dx_buff->pa,
 547                                                dx_buff->len,
 548                                                DMA_TO_DEVICE);
 549                         }
 550                 }
 551         }
 552
 553 exit:
 554         return ret;
 555 }
 556
 557 int aq_nic_xmit(struct aq_nic_s *self, struct sk_buff *skb)
 558 {
 559         struct aq_ring_s *ring = NULL;
 560         unsigned int frags = 0U;
 561         unsigned int vec = skb->queue_mapping % self->aq_nic_cfg.vecs;
 562         unsigned int tc = 0U;
 563         int err = NETDEV_TX_OK;
 564
 565         frags = skb_shinfo(skb)->nr_frags + 1;
 566
 567         ring = self->aq_ring_tx[AQ_NIC_TCVEC2RING(self, tc, vec)];
 568
 569         if (frags > AQ_CFG_SKB_FRAGS_MAX) {
 570                 dev_kfree_skb_any(skb);
 571                 goto err_exit;
 572         }
 573
 574         aq_ring_update_queue_state(ring);
 575
 576         /* Above status update may stop the queue. Check this. */
 577         if (__netif_subqueue_stopped(self->ndev, ring->idx)) {
 578                 err = NETDEV_TX_BUSY;
 579                 goto err_exit;
 580         }
 581
 582         frags = aq_nic_map_skb(self, skb, ring);
 583
 584         if (likely(frags)) {
 585                 err = self->aq_hw_ops->hw_ring_tx_xmit(self->aq_hw,
 586                                                        ring, frags);
 587                 if (err >= 0) {
 588                         ++ring->stats.tx.packets;
 589                         ring->stats.tx.bytes += skb->len;
 590                 }
 591         } else {
 592                 err = NETDEV_TX_BUSY;
 593         }
 594
 595 err_exit:
 596         return err;
 597 }
 598
 599 int aq_nic_update_interrupt_moderation_settings(struct aq_nic_s *self)
 600 {
 601         return self->aq_hw_ops->hw_interrupt_moderation_set(self->aq_hw);
 602 }
 603
 604 int aq_nic_set_packet_filter(struct aq_nic_s *self, unsigned int flags)
 605 {
 606         int err = 0;
 607
 608         err = self->aq_hw_ops->hw_packet_filter_set(self->aq_hw, flags);
 609         if (err < 0)
 610                 goto err_exit;
 611
 612         self->packet_filter = flags;
 613
 614 err_exit:
 615         return err;
 616 }
 617
 618 int aq_nic_set_multicast_list(struct aq_nic_s *self, struct net_device *ndev)
 619 {
 620         unsigned int packet_filter = self->packet_filter;
 621         struct netdev_hw_addr *ha = NULL;
 622         unsigned int i = 0U;
 623
 624         self->mc_list.count = 0;
 625         if (netdev_uc_count(ndev) > AQ_HW_MULTICAST_ADDRESS_MAX) {
 626                 packet_filter |= IFF_PROMISC;
 627         } else {
 628                 netdev_for_each_uc_addr(ha, ndev) {
 629                         ether_addr_copy(self->mc_list.ar[i++], ha->addr);
 630
 631                         if (i >= AQ_HW_MULTICAST_ADDRESS_MAX)
 632                                 break;
 633                 }
 634         }
 635
 636         if (i + netdev_mc_count(ndev) > AQ_HW_MULTICAST_ADDRESS_MAX) {
 637                 packet_filter |= IFF_ALLMULTI;
 638         } else {
 639                 netdev_for_each_mc_addr(ha, ndev) {
 640                         ether_addr_copy(self->mc_list.ar[i++], ha->addr);
 641
 642                         if (i >= AQ_HW_MULTICAST_ADDRESS_MAX)
 643                                 break;
 644                 }
 645         }
 646
 647         if (i > 0 && i <= AQ_HW_MULTICAST_ADDRESS_MAX) {
 648                 packet_filter |= IFF_MULTICAST;
 649                 self->mc_list.count = i;
 650                 self->aq_hw_ops->hw_multicast_list_set(self->aq_hw,
 651                                                        self->mc_list.ar,
 652                                                        self->mc_list.count);
 653         }
 654         return aq_nic_set_packet_filter(self, packet_filter);
 655 }
 656
 657 int aq_nic_set_mtu(struct aq_nic_s *self, int new_mtu)
 658 {
 659         self->aq_nic_cfg.mtu = new_mtu;
 660
 661         return 0;
 662 }
 663
 664 int aq_nic_set_mac(struct aq_nic_s *self, struct net_device *ndev)
 665 {
 666         return self->aq_hw_ops->hw_set_mac_address(self->aq_hw, ndev->dev_addr);
 667 }
 668
 669 unsigned int aq_nic_get_link_speed(struct aq_nic_s *self)
 670 {
 671         return self->link_status.mbps;
 672 }
 673
 674 int aq_nic_get_regs(struct aq_nic_s *self, struct ethtool_regs *regs, void *p)
 675 {
 676         u32 *regs_buff = p;
 677         int err = 0;
 678
 679         regs->version = 1;
 680
 681         err = self->aq_hw_ops->hw_get_regs(self->aq_hw,
 682                                            self->aq_nic_cfg.aq_hw_caps,
 683                                            regs_buff);
 684         if (err < 0)
 685                 goto err_exit;
 686
 687 err_exit:
 688         return err;
 689 }
 690
 691 int aq_nic_get_regs_count(struct aq_nic_s *self)
 692 {
 693         return self->aq_nic_cfg.aq_hw_caps->mac_regs_count;
 694 }
 695
 696 void aq_nic_get_stats(struct aq_nic_s *self, u64 *data)
 697 {
 698         unsigned int i = 0U;
 699         unsigned int count = 0U;
 700         struct aq_vec_s *aq_vec = NULL;
 701         struct aq_stats_s *stats;
 702
 703         if (self->aq_fw_ops->update_stats) {
 704                 mutex_lock(&self->fwreq_mutex);
 705                 self->aq_fw_ops->update_stats(self->aq_hw);
 706                 mutex_unlock(&self->fwreq_mutex);
 707         }
 708         stats = self->aq_hw_ops->hw_get_hw_stats(self->aq_hw);
 709
 710         if (!stats)
 711                 goto err_exit;
 712
 713         data[i] = stats->uprc + stats->mprc + stats->bprc;
 714         data[++i] = stats->uprc;
 715         data[++i] = stats->mprc;
 716         data[++i] = stats->bprc;
 717         data[++i] = stats->erpt;
 718         data[++i] = stats->uptc + stats->mptc + stats->bptc;
 719         data[++i] = stats->uptc;
 720         data[++i] = stats->mptc;
 721         data[++i] = stats->bptc;
 722         data[++i] = stats->ubrc;
 723         data[++i] = stats->ubtc;
 724         data[++i] = stats->mbrc;
 725         data[++i] = stats->mbtc;
 726         data[++i] = stats->bbrc;
 727         data[++i] = stats->bbtc;
 728         data[++i] = stats->ubrc + stats->mbrc + stats->bbrc;
 729         data[++i] = stats->ubtc + stats->mbtc + stats->bbtc;
 730         data[++i] = stats->dma_pkt_rc;
 731         data[++i] = stats->dma_pkt_tc;
 732         data[++i] = stats->dma_oct_rc;
 733         data[++i] = stats->dma_oct_tc;
 734         data[++i] = stats->dpc;
 735
 736         i++;
 737
 738         data += i;
 739
 740         for (i = 0U, aq_vec = self->aq_vec[0];
 741                 aq_vec && self->aq_vecs > i; ++i, aq_vec = self->aq_vec[i]) {
 742                 data += count;
 743                 aq_vec_get_sw_stats(aq_vec, data, &count);
 744         }
 745
 746 err_exit:;
 747 }
 748
 749 static void aq_nic_update_ndev_stats(struct aq_nic_s *self)
 750 {
 751         struct net_device *ndev = self->ndev;
 752         struct aq_stats_s *stats = self->aq_hw_ops->hw_get_hw_stats(self->aq_hw);
 753
 754         ndev->stats.rx_packets = stats->dma_pkt_rc;
 755         ndev->stats.rx_bytes = stats->dma_oct_rc;
 756         ndev->stats.rx_errors = stats->erpr;
 757         ndev->stats.rx_dropped = stats->dpc;
 758         ndev->stats.tx_packets = stats->dma_pkt_tc;
 759         ndev->stats.tx_bytes = stats->dma_oct_tc;
 760         ndev->stats.tx_errors = stats->erpt;
 761         ndev->stats.multicast = stats->mprc;
 762 }
 763
 764 void aq_nic_get_link_ksettings(struct aq_nic_s *self,
 765                                struct ethtool_link_ksettings *cmd)
 766 {
 767         if (self->aq_nic_cfg.aq_hw_caps->media_type == AQ_HW_MEDIA_TYPE_FIBRE)
 768                 cmd->base.port = PORT_FIBRE;
 769         else
 770                 cmd->base.port = PORT_TP;
 771         /* This driver supports only 10G capable adapters, so DUPLEX_FULL */
 772         cmd->base.duplex = DUPLEX_FULL;
 773         cmd->base.autoneg = self->aq_nic_cfg.is_autoneg;
 774
 775         ethtool_link_ksettings_zero_link_mode(cmd, supported);
 776
 777         if (self->aq_nic_cfg.aq_hw_caps->link_speed_msk & AQ_NIC_RATE_10G)
 778                 ethtool_link_ksettings_add_link_mode(cmd, supported,
 779                                                      10000baseT_Full);
 780
 781         if (self->aq_nic_cfg.aq_hw_caps->link_speed_msk & AQ_NIC_RATE_5G)
 782                 ethtool_link_ksettings_add_link_mode(cmd, supported,
 783                                                      5000baseT_Full);
 784
 785         if (self->aq_nic_cfg.aq_hw_caps->link_speed_msk & AQ_NIC_RATE_2GS)
 786                 ethtool_link_ksettings_add_link_mode(cmd, supported,
 787                                                      2500baseT_Full);
 788
 789         if (self->aq_nic_cfg.aq_hw_caps->link_speed_msk & AQ_NIC_RATE_1G)
 790                 ethtool_link_ksettings_add_link_mode(cmd, supported,
 791                                                      1000baseT_Full);
 792
 793         if (self->aq_nic_cfg.aq_hw_caps->link_speed_msk & AQ_NIC_RATE_100M)
 794                 ethtool_link_ksettings_add_link_mode(cmd, supported,
 795                                                      100baseT_Full);
 796
 797         if (self->aq_nic_cfg.aq_hw_caps->flow_control)
 798                 ethtool_link_ksettings_add_link_mode(cmd, supported,
 799                                                      Pause);
 800
 801         ethtool_link_ksettings_add_link_mode(cmd, supported, Autoneg);
 802
 803         if (self->aq_nic_cfg.aq_hw_caps->media_type == AQ_HW_MEDIA_TYPE_FIBRE)
 804                 ethtool_link_ksettings_add_link_mode(cmd, supported, FIBRE);
 805         else
 806                 ethtool_link_ksettings_add_link_mode(cmd, supported, TP);
 807
 808         ethtool_link_ksettings_zero_link_mode(cmd, advertising);
 809
 810         if (self->aq_nic_cfg.is_autoneg)
 811                 ethtool_link_ksettings_add_link_mode(cmd, advertising, Autoneg);
 812
 813         if (self->aq_nic_cfg.link_speed_msk  & AQ_NIC_RATE_10G)
 814                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
 815                                                      10000baseT_Full);
 816
 817         if (self->aq_nic_cfg.link_speed_msk  & AQ_NIC_RATE_5G)
 818                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
 819                                                      5000baseT_Full);
 820
 821         if (self->aq_nic_cfg.link_speed_msk  & AQ_NIC_RATE_2GS)
 822                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
 823                                                      2500baseT_Full);
 824
 825         if (self->aq_nic_cfg.link_speed_msk  & AQ_NIC_RATE_1G)
 826                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
 827                                                      1000baseT_Full);
 828
 829         if (self->aq_nic_cfg.link_speed_msk  & AQ_NIC_RATE_100M)
 830                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
 831                                                      100baseT_Full);
 832
 833         if (self->aq_nic_cfg.flow_control & AQ_NIC_FC_RX)
 834                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
 835                                                      Pause);
 836
 837         /* Asym is when either RX or TX, but not both */
 838         if (!!(self->aq_nic_cfg.flow_control & AQ_NIC_FC_TX) ^
 839             !!(self->aq_nic_cfg.flow_control & AQ_NIC_FC_RX))
 840                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
 841                                                      Asym_Pause);
 842
 843         if (self->aq_nic_cfg.aq_hw_caps->media_type == AQ_HW_MEDIA_TYPE_FIBRE)
 844                 ethtool_link_ksettings_add_link_mode(cmd, advertising, FIBRE);
 845         else
 846                 ethtool_link_ksettings_add_link_mode(cmd, advertising, TP);
 847 }
 848
 849 int aq_nic_set_link_ksettings(struct aq_nic_s *self,
 850                               const struct ethtool_link_ksettings *cmd)
 851 {
 852         u32 speed = 0U;
 853         u32 rate = 0U;
 854         int err = 0;
 855
 856         if (cmd->base.autoneg == AUTONEG_ENABLE) {
 857                 rate = self->aq_nic_cfg.aq_hw_caps->link_speed_msk;
 858                 self->aq_nic_cfg.is_autoneg = true;
 859         } else {
 860                 speed = cmd->base.speed;
 861
 862                 switch (speed) {
 863                 case SPEED_100:
 864                         rate = AQ_NIC_RATE_100M;
 865                         break;
 866
 867                 case SPEED_1000:
 868                         rate = AQ_NIC_RATE_1G;
 869                         break;
 870
 871                 case SPEED_2500:
 872                         rate = AQ_NIC_RATE_2GS;
 873                         break;
 874
 875                 case SPEED_5000:
 876                         rate = AQ_NIC_RATE_5G;
 877                         break;
 878
 879                 case SPEED_10000:
 880                         rate = AQ_NIC_RATE_10G;
 881                         break;
 882
 883                 default:
 884                         err = -1;
 885                         goto err_exit;
 886                 break;
 887                 }
 888                 if (!(self->aq_nic_cfg.aq_hw_caps->link_speed_msk & rate)) {
 889                         err = -1;
 890                         goto err_exit;
 891                 }
 892
 893                 self->aq_nic_cfg.is_autoneg = false;
 894         }
 895
 896         mutex_lock(&self->fwreq_mutex);
 897         err = self->aq_fw_ops->set_link_speed(self->aq_hw, rate);
 898         mutex_unlock(&self->fwreq_mutex);
 899         if (err < 0)
 900                 goto err_exit;
 901
 902         self->aq_nic_cfg.link_speed_msk = rate;
 903
 904 err_exit:
 905         return err;
 906 }
 907
 908 struct aq_nic_cfg_s *aq_nic_get_cfg(struct aq_nic_s *self)
 909 {
 910         return &self->aq_nic_cfg;
 911 }
 912
 913 u32 aq_nic_get_fw_version(struct aq_nic_s *self)
 914 {
 915         u32 fw_version = 0U;
 916
 917         self->aq_hw_ops->hw_get_fw_version(self->aq_hw, &fw_version);
 918
 919         return fw_version;
 920 }
 921
 922 int aq_nic_stop(struct aq_nic_s *self)
 923 {
 924         struct aq_vec_s *aq_vec = NULL;
 925         unsigned int i = 0U;
 926
 927         netif_tx_disable(self->ndev);
 928         netif_carrier_off(self->ndev);
 929
 930         del_timer_sync(&self->service_timer);
 931         cancel_work_sync(&self->service_task);
 932
 933         self->aq_hw_ops->hw_irq_disable(self->aq_hw, AQ_CFG_IRQ_MASK);
 934
 935         if (self->aq_nic_cfg.is_polling)
 936                 del_timer_sync(&self->polling_timer);
 937         else
 938                 aq_pci_func_free_irqs(self);
 939
 940         for (i = 0U, aq_vec = self->aq_vec[0];
 941                 self->aq_vecs > i; ++i, aq_vec = self->aq_vec[i])
 942                 aq_vec_stop(aq_vec);
 943
 944         return self->aq_hw_ops->hw_stop(self->aq_hw);
 945 }
 946
 947 void aq_nic_deinit(struct aq_nic_s *self)
 948 {
 949         struct aq_vec_s *aq_vec = NULL;
 950         unsigned int i = 0U;
 951
 952         if (!self)
 953                 goto err_exit;
 954
 955         for (i = 0U, aq_vec = self->aq_vec[0];
 956                 self->aq_vecs > i; ++i, aq_vec = self->aq_vec[i])
 957                 aq_vec_deinit(aq_vec);
 958
 959         if (likely(self->aq_fw_ops->deinit)) {
 960                 mutex_lock(&self->fwreq_mutex);
 961                 self->aq_fw_ops->deinit(self->aq_hw);
 962                 mutex_unlock(&self->fwreq_mutex);
 963         }
 964
 965         if (self->power_state != AQ_HW_POWER_STATE_D0 ||
 966             self->aq_hw->aq_nic_cfg->wol)
 967                 if (likely(self->aq_fw_ops->set_power)) {
 968                         mutex_lock(&self->fwreq_mutex);
 969                         self->aq_fw_ops->set_power(self->aq_hw,
 970                                                    self->power_state,
 971                                                    self->ndev->dev_addr);
 972                         mutex_unlock(&self->fwreq_mutex);
 973                 }
 974
 975
 976 err_exit:;
 977 }
 978
 979 void aq_nic_free_vectors(struct aq_nic_s *self)
 980 {
 981         unsigned int i = 0U;
 982
 983         if (!self)
 984                 goto err_exit;
 985
 986         for (i = ARRAY_SIZE(self->aq_vec); i--;) {
 987                 if (self->aq_vec[i]) {
 988                         aq_vec_free(self->aq_vec[i]);
 989                         self->aq_vec[i] = NULL;
 990                 }
 991         }
 992
 993 err_exit:;
 994 }
 995
 996 int aq_nic_change_pm_state(struct aq_nic_s *self, pm_message_t *pm_msg)
 997 {
 998         int err = 0;
 999
1000         if (!netif_running(self->ndev)) {
1001                 err = 0;
1002                 goto out;
1003         }
1004         rtnl_lock();
1005         if (pm_msg->event & PM_EVENT_SLEEP || pm_msg->event & PM_EVENT_FREEZE) {
1006                 self->power_state = AQ_HW_POWER_STATE_D3;
1007                 netif_device_detach(self->ndev);
1008                 netif_tx_stop_all_queues(self->ndev);
1009
1010                 err = aq_nic_stop(self);
1011                 if (err < 0)
1012                         goto err_exit;
1013
1014                 aq_nic_deinit(self);
1015         } else {
1016                 err = aq_nic_init(self);
1017                 if (err < 0)
1018                         goto err_exit;
1019
1020                 err = aq_nic_start(self);
1021                 if (err < 0)
1022                         goto err_exit;
1023
1024                 netif_device_attach(self->ndev);
1025                 netif_tx_start_all_queues(self->ndev);
1026         }
1027
1028 err_exit:
1029         rtnl_unlock();
1030 out:
1031         return err;
1032 }
1033
1034 void aq_nic_shutdown(struct aq_nic_s *self)
1035 {
1036         int err = 0;
1037
1038         if (!self->ndev)
1039                 return;
1040
1041         rtnl_lock();
1042
1043         netif_device_detach(self->ndev);
1044
1045         if (netif_running(self->ndev)) {
1046                 err = aq_nic_stop(self);
1047                 if (err < 0)
1048                         goto err_exit;
1049         }
1050         aq_nic_deinit(self);
1051
1052 err_exit:
1053         rtnl_unlock();
1054 }