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

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