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_rx_strip = !!(cfg->features & NETIF_F_HW_VLAN_CTAG_RX);
 130         cfg->is_vlan_tx_insert = !!(cfg->features & NETIF_F_HW_VLAN_CTAG_TX);
 131         cfg->is_vlan_force_promisc = true;
 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 |
 292                                      NETIF_F_LRO | NETIF_F_TSO;
 293         self->ndev->priv_flags = aq_hw_caps->hw_priv_flags;
 294         self->ndev->priv_flags |= IFF_LIVE_ADDR_CHANGE;
 295
 296         self->ndev->mtu = aq_nic_cfg->mtu - ETH_HLEN;
 297         self->ndev->max_mtu = aq_hw_caps->mtu - ETH_FCS_LEN - ETH_HLEN;
 298
 299 }
 300
 301 void aq_nic_set_tx_ring(struct aq_nic_s *self, unsigned int idx,
 302                         struct aq_ring_s *ring)
 303 {
 304         self->aq_ring_tx[idx] = ring;
 305 }
 306
 307 struct net_device *aq_nic_get_ndev(struct aq_nic_s *self)
 308 {
 309         return self->ndev;
 310 }
 311
 312 int aq_nic_init(struct aq_nic_s *self)
 313 {
 314         struct aq_vec_s *aq_vec = NULL;
 315         int err = 0;
 316         unsigned int i = 0U;
 317
 318         self->power_state = AQ_HW_POWER_STATE_D0;
 319         mutex_lock(&self->fwreq_mutex);
 320         err = self->aq_hw_ops->hw_reset(self->aq_hw);
 321         mutex_unlock(&self->fwreq_mutex);
 322         if (err < 0)
 323                 goto err_exit;
 324
 325         err = self->aq_hw_ops->hw_init(self->aq_hw,
 326                                        aq_nic_get_ndev(self)->dev_addr);
 327         if (err < 0)
 328                 goto err_exit;
 329
 330         for (i = 0U, aq_vec = self->aq_vec[0];
 331                 self->aq_vecs > i; ++i, aq_vec = self->aq_vec[i])
 332                 aq_vec_init(aq_vec, self->aq_hw_ops, self->aq_hw);
 333
 334         netif_carrier_off(self->ndev);
 335
 336 err_exit:
 337         return err;
 338 }
 339
 340 int aq_nic_start(struct aq_nic_s *self)
 341 {
 342         struct aq_vec_s *aq_vec = NULL;
 343         int err = 0;
 344         unsigned int i = 0U;
 345
 346         err = self->aq_hw_ops->hw_multicast_list_set(self->aq_hw,
 347                                                      self->mc_list.ar,
 348                                                      self->mc_list.count);
 349         if (err < 0)
 350                 goto err_exit;
 351
 352         err = self->aq_hw_ops->hw_packet_filter_set(self->aq_hw,
 353                                                     self->packet_filter);
 354         if (err < 0)
 355                 goto err_exit;
 356
 357         for (i = 0U, aq_vec = self->aq_vec[0];
 358                 self->aq_vecs > i; ++i, aq_vec = self->aq_vec[i]) {
 359                 err = aq_vec_start(aq_vec);
 360                 if (err < 0)
 361                         goto err_exit;
 362         }
 363
 364         err = self->aq_hw_ops->hw_start(self->aq_hw);
 365         if (err < 0)
 366                 goto err_exit;
 367
 368         err = aq_nic_update_interrupt_moderation_settings(self);
 369         if (err)
 370                 goto err_exit;
 371
 372         INIT_WORK(&self->service_task, aq_nic_service_task);
 373
 374         timer_setup(&self->service_timer, aq_nic_service_timer_cb, 0);
 375         aq_nic_service_timer_cb(&self->service_timer);
 376
 377         if (self->aq_nic_cfg.is_polling) {
 378                 timer_setup(&self->polling_timer, aq_nic_polling_timer_cb, 0);
 379                 mod_timer(&self->polling_timer, jiffies +
 380                           AQ_CFG_POLLING_TIMER_INTERVAL);
 381         } else {
 382                 for (i = 0U, aq_vec = self->aq_vec[0];
 383                         self->aq_vecs > i; ++i, aq_vec = self->aq_vec[i]) {
 384                         err = aq_pci_func_alloc_irq(self, i, self->ndev->name,
 385                                                     aq_vec_isr, aq_vec,
 386                                                     aq_vec_get_affinity_mask(aq_vec));
 387                         if (err < 0)
 388                                 goto err_exit;
 389                 }
 390
 391                 if (self->aq_nic_cfg.link_irq_vec) {
 392                         int irqvec = pci_irq_vector(self->pdev,
 393                                                    self->aq_nic_cfg.link_irq_vec);
 394                         err = request_threaded_irq(irqvec, NULL,
 395                                                    aq_linkstate_threaded_isr,
 396                                                    IRQF_SHARED | IRQF_ONESHOT,
 397                                                    self->ndev->name, self);
 398                         if (err < 0)
 399                                 goto err_exit;
 400                         self->msix_entry_mask |= (1 << self->aq_nic_cfg.link_irq_vec);
 401                 }
 402
 403                 err = self->aq_hw_ops->hw_irq_enable(self->aq_hw,
 404                                                      AQ_CFG_IRQ_MASK);
 405                 if (err < 0)
 406                         goto err_exit;
 407         }
 408
 409         err = netif_set_real_num_tx_queues(self->ndev, self->aq_vecs);
 410         if (err < 0)
 411                 goto err_exit;
 412
 413         err = netif_set_real_num_rx_queues(self->ndev, self->aq_vecs);
 414         if (err < 0)
 415                 goto err_exit;
 416
 417         netif_tx_start_all_queues(self->ndev);
 418
 419 err_exit:
 420         return err;
 421 }
 422
 423 static unsigned int aq_nic_map_skb(struct aq_nic_s *self,
 424                                    struct sk_buff *skb,
 425                                    struct aq_ring_s *ring)
 426 {
 427         unsigned int ret = 0U;
 428         unsigned int nr_frags = skb_shinfo(skb)->nr_frags;
 429         unsigned int frag_count = 0U;
 430         unsigned int dx = ring->sw_tail;
 431         struct aq_ring_buff_s *first = NULL;
 432         struct aq_ring_buff_s *dx_buff = &ring->buff_ring[dx];
 433         bool need_context_tag = false;
 434
 435         dx_buff->flags = 0U;
 436
 437         if (unlikely(skb_is_gso(skb))) {
 438                 dx_buff->mss = skb_shinfo(skb)->gso_size;
 439                 dx_buff->is_gso = 1U;
 440                 dx_buff->len_pkt = skb->len;
 441                 dx_buff->len_l2 = ETH_HLEN;
 442                 dx_buff->len_l3 = ip_hdrlen(skb);
 443                 dx_buff->len_l4 = tcp_hdrlen(skb);
 444                 dx_buff->eop_index = 0xffffU;
 445                 dx_buff->is_ipv6 =
 446                         (ip_hdr(skb)->version == 6) ? 1U : 0U;
 447                 need_context_tag = true;
 448         }
 449
 450         if (self->aq_nic_cfg.is_vlan_tx_insert && skb_vlan_tag_present(skb)) {
 451                 dx_buff->vlan_tx_tag = skb_vlan_tag_get(skb);
 452                 dx_buff->len_pkt = skb->len;
 453                 dx_buff->is_vlan = 1U;
 454                 need_context_tag = true;
 455         }
 456
 457         if (need_context_tag) {
 458                 dx = aq_ring_next_dx(ring, dx);
 459                 dx_buff = &ring->buff_ring[dx];
 460                 dx_buff->flags = 0U;
 461                 ++ret;
 462         }
 463
 464         dx_buff->len = skb_headlen(skb);
 465         dx_buff->pa = dma_map_single(aq_nic_get_dev(self),
 466                                      skb->data,
 467                                      dx_buff->len,
 468                                      DMA_TO_DEVICE);
 469
 470         if (unlikely(dma_mapping_error(aq_nic_get_dev(self), dx_buff->pa))) {
 471                 ret = 0;
 472                 goto exit;
 473         }
 474
 475         first = dx_buff;
 476         dx_buff->len_pkt = skb->len;
 477         dx_buff->is_sop = 1U;
 478         dx_buff->is_mapped = 1U;
 479         ++ret;
 480
 481         if (skb->ip_summed == CHECKSUM_PARTIAL) {
 482                 dx_buff->is_ip_cso = (htons(ETH_P_IP) == skb->protocol) ?
 483                         1U : 0U;
 484
 485                 if (ip_hdr(skb)->version == 4) {
 486                         dx_buff->is_tcp_cso =
 487                                 (ip_hdr(skb)->protocol == IPPROTO_TCP) ?
 488                                         1U : 0U;
 489                         dx_buff->is_udp_cso =
 490                                 (ip_hdr(skb)->protocol == IPPROTO_UDP) ?
 491                                         1U : 0U;
 492                 } else if (ip_hdr(skb)->version == 6) {
 493                         dx_buff->is_tcp_cso =
 494                                 (ipv6_hdr(skb)->nexthdr == NEXTHDR_TCP) ?
 495                                         1U : 0U;
 496                         dx_buff->is_udp_cso =
 497                                 (ipv6_hdr(skb)->nexthdr == NEXTHDR_UDP) ?
 498                                         1U : 0U;
 499                 }
 500         }
 501
 502         for (; nr_frags--; ++frag_count) {
 503                 unsigned int frag_len = 0U;
 504                 unsigned int buff_offset = 0U;
 505                 unsigned int buff_size = 0U;
 506                 dma_addr_t frag_pa;
 507                 skb_frag_t *frag = &skb_shinfo(skb)->frags[frag_count];
 508
 509                 frag_len = skb_frag_size(frag);
 510
 511                 while (frag_len) {
 512                         if (frag_len > AQ_CFG_TX_FRAME_MAX)
 513                                 buff_size = AQ_CFG_TX_FRAME_MAX;
 514                         else
 515                                 buff_size = frag_len;
 516
 517                         frag_pa = skb_frag_dma_map(aq_nic_get_dev(self),
 518                                                    frag,
 519                                                    buff_offset,
 520                                                    buff_size,
 521                                                    DMA_TO_DEVICE);
 522
 523                         if (unlikely(dma_mapping_error(aq_nic_get_dev(self),
 524                                                        frag_pa)))
 525                                 goto mapping_error;
 526
 527                         dx = aq_ring_next_dx(ring, dx);
 528                         dx_buff = &ring->buff_ring[dx];
 529
 530                         dx_buff->flags = 0U;
 531                         dx_buff->len = buff_size;
 532                         dx_buff->pa = frag_pa;
 533                         dx_buff->is_mapped = 1U;
 534                         dx_buff->eop_index = 0xffffU;
 535
 536                         frag_len -= buff_size;
 537                         buff_offset += buff_size;
 538
 539                         ++ret;
 540                 }
 541         }
 542
 543         first->eop_index = dx;
 544         dx_buff->is_eop = 1U;
 545         dx_buff->skb = skb;
 546         goto exit;
 547
 548 mapping_error:
 549         for (dx = ring->sw_tail;
 550              ret > 0;
 551              --ret, dx = aq_ring_next_dx(ring, dx)) {
 552                 dx_buff = &ring->buff_ring[dx];
 553
 554                 if (!dx_buff->is_gso && !dx_buff->is_vlan && dx_buff->pa) {
 555                         if (unlikely(dx_buff->is_sop)) {
 556                                 dma_unmap_single(aq_nic_get_dev(self),
 557                                                  dx_buff->pa,
 558                                                  dx_buff->len,
 559                                                  DMA_TO_DEVICE);
 560                         } else {
 561                                 dma_unmap_page(aq_nic_get_dev(self),
 562                                                dx_buff->pa,
 563                                                dx_buff->len,
 564                                                DMA_TO_DEVICE);
 565                         }
 566                 }
 567         }
 568
 569 exit:
 570         return ret;
 571 }
 572
 573 int aq_nic_xmit(struct aq_nic_s *self, struct sk_buff *skb)
 574 {
 575         struct aq_ring_s *ring = NULL;
 576         unsigned int frags = 0U;
 577         unsigned int vec = skb->queue_mapping % self->aq_nic_cfg.vecs;
 578         unsigned int tc = 0U;
 579         int err = NETDEV_TX_OK;
 580
 581         frags = skb_shinfo(skb)->nr_frags + 1;
 582
 583         ring = self->aq_ring_tx[AQ_NIC_TCVEC2RING(self, tc, vec)];
 584
 585         if (frags > AQ_CFG_SKB_FRAGS_MAX) {
 586                 dev_kfree_skb_any(skb);
 587                 goto err_exit;
 588         }
 589
 590         aq_ring_update_queue_state(ring);
 591
 592         /* Above status update may stop the queue. Check this. */
 593         if (__netif_subqueue_stopped(self->ndev, ring->idx)) {
 594                 err = NETDEV_TX_BUSY;
 595                 goto err_exit;
 596         }
 597
 598         frags = aq_nic_map_skb(self, skb, ring);
 599
 600         if (likely(frags)) {
 601                 err = self->aq_hw_ops->hw_ring_tx_xmit(self->aq_hw,
 602                                                        ring, frags);
 603         } else {
 604                 err = NETDEV_TX_BUSY;
 605         }
 606
 607 err_exit:
 608         return err;
 609 }
 610
 611 int aq_nic_update_interrupt_moderation_settings(struct aq_nic_s *self)
 612 {
 613         return self->aq_hw_ops->hw_interrupt_moderation_set(self->aq_hw);
 614 }
 615
 616 int aq_nic_set_packet_filter(struct aq_nic_s *self, unsigned int flags)
 617 {
 618         int err = 0;
 619
 620         err = self->aq_hw_ops->hw_packet_filter_set(self->aq_hw, flags);
 621         if (err < 0)
 622                 goto err_exit;
 623
 624         self->packet_filter = flags;
 625
 626 err_exit:
 627         return err;
 628 }
 629
 630 int aq_nic_set_multicast_list(struct aq_nic_s *self, struct net_device *ndev)
 631 {
 632         const struct aq_hw_ops *hw_ops = self->aq_hw_ops;
 633         struct aq_nic_cfg_s *cfg = &self->aq_nic_cfg;
 634         unsigned int packet_filter = ndev->flags;
 635         struct netdev_hw_addr *ha = NULL;
 636         unsigned int i = 0U;
 637         int err = 0;
 638
 639         self->mc_list.count = 0;
 640         if (netdev_uc_count(ndev) > AQ_HW_MULTICAST_ADDRESS_MAX) {
 641                 packet_filter |= IFF_PROMISC;
 642         } else {
 643                 netdev_for_each_uc_addr(ha, ndev) {
 644                         ether_addr_copy(self->mc_list.ar[i++], ha->addr);
 645                 }
 646         }
 647
 648         cfg->is_mc_list_enabled = !!(packet_filter & IFF_MULTICAST);
 649         if (cfg->is_mc_list_enabled) {
 650                 if (i + netdev_mc_count(ndev) > AQ_HW_MULTICAST_ADDRESS_MAX) {
 651                         packet_filter |= IFF_ALLMULTI;
 652                 } else {
 653                         netdev_for_each_mc_addr(ha, ndev) {
 654                                 ether_addr_copy(self->mc_list.ar[i++],
 655                                                 ha->addr);
 656                         }
 657                 }
 658         }
 659
 660         if (i > 0 && i <= AQ_HW_MULTICAST_ADDRESS_MAX) {
 661                 self->mc_list.count = i;
 662                 err = hw_ops->hw_multicast_list_set(self->aq_hw,
 663                                                     self->mc_list.ar,
 664                                                     self->mc_list.count);
 665                 if (err < 0)
 666                         return err;
 667         }
 668         return aq_nic_set_packet_filter(self, packet_filter);
 669 }
 670
 671 int aq_nic_set_mtu(struct aq_nic_s *self, int new_mtu)
 672 {
 673         self->aq_nic_cfg.mtu = new_mtu;
 674
 675         return 0;
 676 }
 677
 678 int aq_nic_set_mac(struct aq_nic_s *self, struct net_device *ndev)
 679 {
 680         return self->aq_hw_ops->hw_set_mac_address(self->aq_hw, ndev->dev_addr);
 681 }
 682
 683 unsigned int aq_nic_get_link_speed(struct aq_nic_s *self)
 684 {
 685         return self->link_status.mbps;
 686 }
 687
 688 int aq_nic_get_regs(struct aq_nic_s *self, struct ethtool_regs *regs, void *p)
 689 {
 690         u32 *regs_buff = p;
 691         int err = 0;
 692
 693         regs->version = 1;
 694
 695         err = self->aq_hw_ops->hw_get_regs(self->aq_hw,
 696                                            self->aq_nic_cfg.aq_hw_caps,
 697                                            regs_buff);
 698         if (err < 0)
 699                 goto err_exit;
 700
 701 err_exit:
 702         return err;
 703 }
 704
 705 int aq_nic_get_regs_count(struct aq_nic_s *self)
 706 {
 707         return self->aq_nic_cfg.aq_hw_caps->mac_regs_count;
 708 }
 709
 710 void aq_nic_get_stats(struct aq_nic_s *self, u64 *data)
 711 {
 712         unsigned int i = 0U;
 713         unsigned int count = 0U;
 714         struct aq_vec_s *aq_vec = NULL;
 715         struct aq_stats_s *stats;
 716
 717         if (self->aq_fw_ops->update_stats) {
 718                 mutex_lock(&self->fwreq_mutex);
 719                 self->aq_fw_ops->update_stats(self->aq_hw);
 720                 mutex_unlock(&self->fwreq_mutex);
 721         }
 722         stats = self->aq_hw_ops->hw_get_hw_stats(self->aq_hw);
 723
 724         if (!stats)
 725                 goto err_exit;
 726
 727         data[i] = stats->uprc + stats->mprc + stats->bprc;
 728         data[++i] = stats->uprc;
 729         data[++i] = stats->mprc;
 730         data[++i] = stats->bprc;
 731         data[++i] = stats->erpt;
 732         data[++i] = stats->uptc + stats->mptc + stats->bptc;
 733         data[++i] = stats->uptc;
 734         data[++i] = stats->mptc;
 735         data[++i] = stats->bptc;
 736         data[++i] = stats->ubrc;
 737         data[++i] = stats->ubtc;
 738         data[++i] = stats->mbrc;
 739         data[++i] = stats->mbtc;
 740         data[++i] = stats->bbrc;
 741         data[++i] = stats->bbtc;
 742         data[++i] = stats->ubrc + stats->mbrc + stats->bbrc;
 743         data[++i] = stats->ubtc + stats->mbtc + stats->bbtc;
 744         data[++i] = stats->dma_pkt_rc;
 745         data[++i] = stats->dma_pkt_tc;
 746         data[++i] = stats->dma_oct_rc;
 747         data[++i] = stats->dma_oct_tc;
 748         data[++i] = stats->dpc;
 749
 750         i++;
 751
 752         data += i;
 753
 754         for (i = 0U, aq_vec = self->aq_vec[0];
 755                 aq_vec && self->aq_vecs > i; ++i, aq_vec = self->aq_vec[i]) {
 756                 data += count;
 757                 aq_vec_get_sw_stats(aq_vec, data, &count);
 758         }
 759
 760 err_exit:;
 761 }
 762
 763 static void aq_nic_update_ndev_stats(struct aq_nic_s *self)
 764 {
 765         struct net_device *ndev = self->ndev;
 766         struct aq_stats_s *stats = self->aq_hw_ops->hw_get_hw_stats(self->aq_hw);
 767
 768         ndev->stats.rx_packets = stats->dma_pkt_rc;
 769         ndev->stats.rx_bytes = stats->dma_oct_rc;
 770         ndev->stats.rx_errors = stats->erpr;
 771         ndev->stats.rx_dropped = stats->dpc;
 772         ndev->stats.tx_packets = stats->dma_pkt_tc;
 773         ndev->stats.tx_bytes = stats->dma_oct_tc;
 774         ndev->stats.tx_errors = stats->erpt;
 775         ndev->stats.multicast = stats->mprc;
 776 }
 777
 778 void aq_nic_get_link_ksettings(struct aq_nic_s *self,
 779                                struct ethtool_link_ksettings *cmd)
 780 {
 781         if (self->aq_nic_cfg.aq_hw_caps->media_type == AQ_HW_MEDIA_TYPE_FIBRE)
 782                 cmd->base.port = PORT_FIBRE;
 783         else
 784                 cmd->base.port = PORT_TP;
 785         /* This driver supports only 10G capable adapters, so DUPLEX_FULL */
 786         cmd->base.duplex = DUPLEX_FULL;
 787         cmd->base.autoneg = self->aq_nic_cfg.is_autoneg;
 788
 789         ethtool_link_ksettings_zero_link_mode(cmd, supported);
 790
 791         if (self->aq_nic_cfg.aq_hw_caps->link_speed_msk & AQ_NIC_RATE_10G)
 792                 ethtool_link_ksettings_add_link_mode(cmd, supported,
 793                                                      10000baseT_Full);
 794
 795         if (self->aq_nic_cfg.aq_hw_caps->link_speed_msk & AQ_NIC_RATE_5G)
 796                 ethtool_link_ksettings_add_link_mode(cmd, supported,
 797                                                      5000baseT_Full);
 798
 799         if (self->aq_nic_cfg.aq_hw_caps->link_speed_msk & AQ_NIC_RATE_2GS)
 800                 ethtool_link_ksettings_add_link_mode(cmd, supported,
 801                                                      2500baseT_Full);
 802
 803         if (self->aq_nic_cfg.aq_hw_caps->link_speed_msk & AQ_NIC_RATE_1G)
 804                 ethtool_link_ksettings_add_link_mode(cmd, supported,
 805                                                      1000baseT_Full);
 806
 807         if (self->aq_nic_cfg.aq_hw_caps->link_speed_msk & AQ_NIC_RATE_100M)
 808                 ethtool_link_ksettings_add_link_mode(cmd, supported,
 809                                                      100baseT_Full);
 810
 811         if (self->aq_nic_cfg.aq_hw_caps->flow_control)
 812                 ethtool_link_ksettings_add_link_mode(cmd, supported,
 813                                                      Pause);
 814
 815         ethtool_link_ksettings_add_link_mode(cmd, supported, Autoneg);
 816
 817         if (self->aq_nic_cfg.aq_hw_caps->media_type == AQ_HW_MEDIA_TYPE_FIBRE)
 818                 ethtool_link_ksettings_add_link_mode(cmd, supported, FIBRE);
 819         else
 820                 ethtool_link_ksettings_add_link_mode(cmd, supported, TP);
 821
 822         ethtool_link_ksettings_zero_link_mode(cmd, advertising);
 823
 824         if (self->aq_nic_cfg.is_autoneg)
 825                 ethtool_link_ksettings_add_link_mode(cmd, advertising, Autoneg);
 826
 827         if (self->aq_nic_cfg.link_speed_msk  & AQ_NIC_RATE_10G)
 828                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
 829                                                      10000baseT_Full);
 830
 831         if (self->aq_nic_cfg.link_speed_msk  & AQ_NIC_RATE_5G)
 832                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
 833                                                      5000baseT_Full);
 834
 835         if (self->aq_nic_cfg.link_speed_msk  & AQ_NIC_RATE_2GS)
 836                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
 837                                                      2500baseT_Full);
 838
 839         if (self->aq_nic_cfg.link_speed_msk  & AQ_NIC_RATE_1G)
 840                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
 841                                                      1000baseT_Full);
 842
 843         if (self->aq_nic_cfg.link_speed_msk  & AQ_NIC_RATE_100M)
 844                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
 845                                                      100baseT_Full);
 846
 847         if (self->aq_nic_cfg.flow_control & AQ_NIC_FC_RX)
 848                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
 849                                                      Pause);
 850
 851         /* Asym is when either RX or TX, but not both */
 852         if (!!(self->aq_nic_cfg.flow_control & AQ_NIC_FC_TX) ^
 853             !!(self->aq_nic_cfg.flow_control & AQ_NIC_FC_RX))
 854                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
 855                                                      Asym_Pause);
 856
 857         if (self->aq_nic_cfg.aq_hw_caps->media_type == AQ_HW_MEDIA_TYPE_FIBRE)
 858                 ethtool_link_ksettings_add_link_mode(cmd, advertising, FIBRE);
 859         else
 860                 ethtool_link_ksettings_add_link_mode(cmd, advertising, TP);
 861 }
 862
 863 int aq_nic_set_link_ksettings(struct aq_nic_s *self,
 864                               const struct ethtool_link_ksettings *cmd)
 865 {
 866         u32 speed = 0U;
 867         u32 rate = 0U;
 868         int err = 0;
 869
 870         if (cmd->base.autoneg == AUTONEG_ENABLE) {
 871                 rate = self->aq_nic_cfg.aq_hw_caps->link_speed_msk;
 872                 self->aq_nic_cfg.is_autoneg = true;
 873         } else {
 874                 speed = cmd->base.speed;
 875
 876                 switch (speed) {
 877                 case SPEED_100:
 878                         rate = AQ_NIC_RATE_100M;
 879                         break;
 880
 881                 case SPEED_1000:
 882                         rate = AQ_NIC_RATE_1G;
 883                         break;
 884
 885                 case SPEED_2500:
 886                         rate = AQ_NIC_RATE_2GS;
 887                         break;
 888
 889                 case SPEED_5000:
 890                         rate = AQ_NIC_RATE_5G;
 891                         break;
 892
 893                 case SPEED_10000:
 894                         rate = AQ_NIC_RATE_10G;
 895                         break;
 896
 897                 default:
 898                         err = -1;
 899                         goto err_exit;
 900                 break;
 901                 }
 902                 if (!(self->aq_nic_cfg.aq_hw_caps->link_speed_msk & rate)) {
 903                         err = -1;
 904                         goto err_exit;
 905                 }
 906
 907                 self->aq_nic_cfg.is_autoneg = false;
 908         }
 909
 910         mutex_lock(&self->fwreq_mutex);
 911         err = self->aq_fw_ops->set_link_speed(self->aq_hw, rate);
 912         mutex_unlock(&self->fwreq_mutex);
 913         if (err < 0)
 914                 goto err_exit;
 915
 916         self->aq_nic_cfg.link_speed_msk = rate;
 917
 918 err_exit:
 919         return err;
 920 }
 921
 922 struct aq_nic_cfg_s *aq_nic_get_cfg(struct aq_nic_s *self)
 923 {
 924         return &self->aq_nic_cfg;
 925 }
 926
 927 u32 aq_nic_get_fw_version(struct aq_nic_s *self)
 928 {
 929         u32 fw_version = 0U;
 930
 931         self->aq_hw_ops->hw_get_fw_version(self->aq_hw, &fw_version);
 932
 933         return fw_version;
 934 }
 935
 936 int aq_nic_stop(struct aq_nic_s *self)
 937 {
 938         struct aq_vec_s *aq_vec = NULL;
 939         unsigned int i = 0U;
 940
 941         netif_tx_disable(self->ndev);
 942         netif_carrier_off(self->ndev);
 943
 944         del_timer_sync(&self->service_timer);
 945         cancel_work_sync(&self->service_task);
 946
 947         self->aq_hw_ops->hw_irq_disable(self->aq_hw, AQ_CFG_IRQ_MASK);
 948
 949         if (self->aq_nic_cfg.is_polling)
 950                 del_timer_sync(&self->polling_timer);
 951         else
 952                 aq_pci_func_free_irqs(self);
 953
 954         for (i = 0U, aq_vec = self->aq_vec[0];
 955                 self->aq_vecs > i; ++i, aq_vec = self->aq_vec[i])
 956                 aq_vec_stop(aq_vec);
 957
 958         return self->aq_hw_ops->hw_stop(self->aq_hw);
 959 }
 960
 961 void aq_nic_deinit(struct aq_nic_s *self)
 962 {
 963         struct aq_vec_s *aq_vec = NULL;
 964         unsigned int i = 0U;
 965
 966         if (!self)
 967                 goto err_exit;
 968
 969         for (i = 0U, aq_vec = self->aq_vec[0];
 970                 self->aq_vecs > i; ++i, aq_vec = self->aq_vec[i])
 971                 aq_vec_deinit(aq_vec);
 972
 973         if (likely(self->aq_fw_ops->deinit)) {
 974                 mutex_lock(&self->fwreq_mutex);
 975                 self->aq_fw_ops->deinit(self->aq_hw);
 976                 mutex_unlock(&self->fwreq_mutex);
 977         }
 978
 979         if (self->power_state != AQ_HW_POWER_STATE_D0 ||
 980             self->aq_hw->aq_nic_cfg->wol)
 981                 if (likely(self->aq_fw_ops->set_power)) {
 982                         mutex_lock(&self->fwreq_mutex);
 983                         self->aq_fw_ops->set_power(self->aq_hw,
 984                                                    self->power_state,
 985                                                    self->ndev->dev_addr);
 986                         mutex_unlock(&self->fwreq_mutex);
 987                 }
 988
 989
 990 err_exit:;
 991 }
 992
 993 void aq_nic_free_vectors(struct aq_nic_s *self)
 994 {
 995         unsigned int i = 0U;
 996
 997         if (!self)
 998                 goto err_exit;
 999
1000         for (i = ARRAY_SIZE(self->aq_vec); i--;) {
1001                 if (self->aq_vec[i]) {
1002                         aq_vec_free(self->aq_vec[i]);
1003                         self->aq_vec[i] = NULL;
1004                 }
1005         }
1006
1007 err_exit:;
1008 }
1009
1010 int aq_nic_change_pm_state(struct aq_nic_s *self, pm_message_t *pm_msg)
1011 {
1012         int err = 0;
1013
1014         if (!netif_running(self->ndev)) {
1015                 err = 0;
1016                 goto out;
1017         }
1018         rtnl_lock();
1019         if (pm_msg->event & PM_EVENT_SLEEP || pm_msg->event & PM_EVENT_FREEZE) {
1020                 self->power_state = AQ_HW_POWER_STATE_D3;
1021                 netif_device_detach(self->ndev);
1022                 netif_tx_stop_all_queues(self->ndev);
1023
1024                 err = aq_nic_stop(self);
1025                 if (err < 0)
1026                         goto err_exit;
1027
1028                 aq_nic_deinit(self);
1029         } else {
1030                 err = aq_nic_init(self);
1031                 if (err < 0)
1032                         goto err_exit;
1033
1034                 err = aq_nic_start(self);
1035                 if (err < 0)
1036                         goto err_exit;
1037
1038                 netif_device_attach(self->ndev);
1039                 netif_tx_start_all_queues(self->ndev);
1040         }
1041
1042 err_exit:
1043         rtnl_unlock();
1044 out:
1045         return err;
1046 }
1047
1048 void aq_nic_shutdown(struct aq_nic_s *self)
1049 {
1050         int err = 0;
1051
1052         if (!self->ndev)
1053                 return;
1054
1055         rtnl_lock();
1056
1057         netif_device_detach(self->ndev);
1058
1059         if (netif_running(self->ndev)) {
1060                 err = aq_nic_stop(self);
1061                 if (err < 0)
1062                         goto err_exit;
1063         }
1064         aq_nic_deinit(self);
1065
1066 err_exit:
1067         rtnl_unlock();
1068 }