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 pci_dev *pdev,
 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, &pdev->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                                           pdev->device, pdev->subsystem_device);
 259         if (err < 0)
 260                 goto err_exit;
 261
 262         aq_nic_cfg_init_defaults(self);
 263
 264 err_exit:
 265         if (err < 0) {
 266                 aq_nic_free_hot_resources(self);
 267                 self = NULL;
 268         }
 269         return self;
 270 }
 271
 272 int aq_nic_ndev_register(struct aq_nic_s *self)
 273 {
 274         int err = 0;
 275
 276         if (!self->ndev) {
 277                 err = -EINVAL;
 278                 goto err_exit;
 279         }
 280         err = self->aq_hw_ops.hw_get_mac_permanent(self->aq_hw,
 281                             self->aq_nic_cfg.aq_hw_caps,
 282                             self->ndev->dev_addr);
 283         if (err < 0)
 284                 goto err_exit;
 285
 286 #if defined(AQ_CFG_MAC_ADDR_PERMANENT)
 287         {
 288                 static u8 mac_addr_permanent[] = AQ_CFG_MAC_ADDR_PERMANENT;
 289
 290                 ether_addr_copy(self->ndev->dev_addr, mac_addr_permanent);
 291         }
 292 #endif
 293
 294         netif_carrier_off(self->ndev);
 295
 296         netif_tx_disable(self->ndev);
 297
 298         err = register_netdev(self->ndev);
 299         if (err < 0)
 300                 goto err_exit;
 301
 302 err_exit:
 303         return err;
 304 }
 305
 306 int aq_nic_ndev_init(struct aq_nic_s *self)
 307 {
 308         struct aq_hw_caps_s *aq_hw_caps = self->aq_nic_cfg.aq_hw_caps;
 309         struct aq_nic_cfg_s *aq_nic_cfg = &self->aq_nic_cfg;
 310
 311         self->ndev->hw_features |= aq_hw_caps->hw_features;
 312         self->ndev->features = aq_hw_caps->hw_features;
 313         self->ndev->priv_flags = aq_hw_caps->hw_priv_flags;
 314         self->ndev->mtu = aq_nic_cfg->mtu - ETH_HLEN;
 315         self->ndev->max_mtu = self->aq_hw_caps.mtu - ETH_FCS_LEN - ETH_HLEN;
 316
 317         return 0;
 318 }
 319
 320 void aq_nic_ndev_free(struct aq_nic_s *self)
 321 {
 322         if (!self->ndev)
 323                 goto err_exit;
 324
 325         if (self->ndev->reg_state == NETREG_REGISTERED)
 326                 unregister_netdev(self->ndev);
 327
 328         if (self->aq_hw)
 329                 self->aq_hw_ops.destroy(self->aq_hw);
 330
 331         free_netdev(self->ndev);
 332
 333 err_exit:;
 334 }
 335
 336 struct aq_nic_s *aq_nic_alloc_hot(struct net_device *ndev)
 337 {
 338         struct aq_nic_s *self = NULL;
 339         int err = 0;
 340
 341         if (!ndev) {
 342                 err = -EINVAL;
 343                 goto err_exit;
 344         }
 345         self = netdev_priv(ndev);
 346
 347         if (!self) {
 348                 err = -EINVAL;
 349                 goto err_exit;
 350         }
 351         if (netif_running(ndev))
 352                 netif_tx_disable(ndev);
 353         netif_carrier_off(self->ndev);
 354
 355         for (self->aq_vecs = 0; self->aq_vecs < self->aq_nic_cfg.vecs;
 356                 self->aq_vecs++) {
 357                 self->aq_vec[self->aq_vecs] =
 358                     aq_vec_alloc(self, self->aq_vecs, &self->aq_nic_cfg);
 359                 if (!self->aq_vec[self->aq_vecs]) {
 360                         err = -ENOMEM;
 361                         goto err_exit;
 362                 }
 363         }
 364
 365 err_exit:
 366         if (err < 0) {
 367                 aq_nic_free_hot_resources(self);
 368                 self = NULL;
 369         }
 370         return self;
 371 }
 372
 373 void aq_nic_set_tx_ring(struct aq_nic_s *self, unsigned int idx,
 374                         struct aq_ring_s *ring)
 375 {
 376         self->aq_ring_tx[idx] = ring;
 377 }
 378
 379 struct device *aq_nic_get_dev(struct aq_nic_s *self)
 380 {
 381         return self->ndev->dev.parent;
 382 }
 383
 384 struct net_device *aq_nic_get_ndev(struct aq_nic_s *self)
 385 {
 386         return self->ndev;
 387 }
 388
 389 int aq_nic_init(struct aq_nic_s *self)
 390 {
 391         struct aq_vec_s *aq_vec = NULL;
 392         int err = 0;
 393         unsigned int i = 0U;
 394
 395         self->power_state = AQ_HW_POWER_STATE_D0;
 396         err = self->aq_hw_ops.hw_reset(self->aq_hw);
 397         if (err < 0)
 398                 goto err_exit;
 399
 400         err = self->aq_hw_ops.hw_init(self->aq_hw, &self->aq_nic_cfg,
 401                             aq_nic_get_ndev(self)->dev_addr);
 402         if (err < 0)
 403                 goto err_exit;
 404
 405         for (i = 0U, aq_vec = self->aq_vec[0];
 406                 self->aq_vecs > i; ++i, aq_vec = self->aq_vec[i])
 407                 aq_vec_init(aq_vec, &self->aq_hw_ops, self->aq_hw);
 408
 409 err_exit:
 410         return err;
 411 }
 412
 413 int aq_nic_start(struct aq_nic_s *self)
 414 {
 415         struct aq_vec_s *aq_vec = NULL;
 416         int err = 0;
 417         unsigned int i = 0U;
 418
 419         err = self->aq_hw_ops.hw_multicast_list_set(self->aq_hw,
 420                                                     self->mc_list.ar,
 421                                                     self->mc_list.count);
 422         if (err < 0)
 423                 goto err_exit;
 424
 425         err = self->aq_hw_ops.hw_packet_filter_set(self->aq_hw,
 426                                                    self->packet_filter);
 427         if (err < 0)
 428                 goto err_exit;
 429
 430         for (i = 0U, aq_vec = self->aq_vec[0];
 431                 self->aq_vecs > i; ++i, aq_vec = self->aq_vec[i]) {
 432                 err = aq_vec_start(aq_vec);
 433                 if (err < 0)
 434                         goto err_exit;
 435         }
 436
 437         err = self->aq_hw_ops.hw_start(self->aq_hw);
 438         if (err < 0)
 439                 goto err_exit;
 440
 441         err = aq_nic_update_interrupt_moderation_settings(self);
 442         if (err)
 443                 goto err_exit;
 444         setup_timer(&self->service_timer, &aq_nic_service_timer_cb,
 445                     (unsigned long)self);
 446         mod_timer(&self->service_timer, jiffies +
 447                         AQ_CFG_SERVICE_TIMER_INTERVAL);
 448
 449         if (self->aq_nic_cfg.is_polling) {
 450                 setup_timer(&self->polling_timer, &aq_nic_polling_timer_cb,
 451                             (unsigned long)self);
 452                 mod_timer(&self->polling_timer, jiffies +
 453                           AQ_CFG_POLLING_TIMER_INTERVAL);
 454         } else {
 455                 for (i = 0U, aq_vec = self->aq_vec[0];
 456                         self->aq_vecs > i; ++i, aq_vec = self->aq_vec[i]) {
 457                         err = aq_pci_func_alloc_irq(self->aq_pci_func, i,
 458                                                     self->ndev->name, aq_vec,
 459                                         aq_vec_get_affinity_mask(aq_vec));
 460                         if (err < 0)
 461                                 goto err_exit;
 462                 }
 463
 464                 err = self->aq_hw_ops.hw_irq_enable(self->aq_hw,
 465                                     AQ_CFG_IRQ_MASK);
 466                 if (err < 0)
 467                         goto err_exit;
 468         }
 469
 470         err = netif_set_real_num_tx_queues(self->ndev, self->aq_vecs);
 471         if (err < 0)
 472                 goto err_exit;
 473
 474         err = netif_set_real_num_rx_queues(self->ndev, self->aq_vecs);
 475         if (err < 0)
 476                 goto err_exit;
 477
 478         netif_tx_start_all_queues(self->ndev);
 479
 480 err_exit:
 481         return err;
 482 }
 483
 484 static unsigned int aq_nic_map_skb(struct aq_nic_s *self,
 485                                    struct sk_buff *skb,
 486                                    struct aq_ring_s *ring)
 487 {
 488         unsigned int ret = 0U;
 489         unsigned int nr_frags = skb_shinfo(skb)->nr_frags;
 490         unsigned int frag_count = 0U;
 491         unsigned int dx = ring->sw_tail;
 492         struct aq_ring_buff_s *first = NULL;
 493         struct aq_ring_buff_s *dx_buff = &ring->buff_ring[dx];
 494
 495         if (unlikely(skb_is_gso(skb))) {
 496                 dx_buff->flags = 0U;
 497                 dx_buff->len_pkt = skb->len;
 498                 dx_buff->len_l2 = ETH_HLEN;
 499                 dx_buff->len_l3 = ip_hdrlen(skb);
 500                 dx_buff->len_l4 = tcp_hdrlen(skb);
 501                 dx_buff->mss = skb_shinfo(skb)->gso_size;
 502                 dx_buff->is_txc = 1U;
 503                 dx_buff->eop_index = 0xffffU;
 504
 505                 dx_buff->is_ipv6 =
 506                         (ip_hdr(skb)->version == 6) ? 1U : 0U;
 507
 508                 dx = aq_ring_next_dx(ring, dx);
 509                 dx_buff = &ring->buff_ring[dx];
 510                 ++ret;
 511         }
 512
 513         dx_buff->flags = 0U;
 514         dx_buff->len = skb_headlen(skb);
 515         dx_buff->pa = dma_map_single(aq_nic_get_dev(self),
 516                                      skb->data,
 517                                      dx_buff->len,
 518                                      DMA_TO_DEVICE);
 519
 520         if (unlikely(dma_mapping_error(aq_nic_get_dev(self), dx_buff->pa)))
 521                 goto exit;
 522
 523         first = dx_buff;
 524         dx_buff->len_pkt = skb->len;
 525         dx_buff->is_sop = 1U;
 526         dx_buff->is_mapped = 1U;
 527         ++ret;
 528
 529         if (skb->ip_summed == CHECKSUM_PARTIAL) {
 530                 dx_buff->is_ip_cso = (htons(ETH_P_IP) == skb->protocol) ?
 531                         1U : 0U;
 532
 533                 if (ip_hdr(skb)->version == 4) {
 534                         dx_buff->is_tcp_cso =
 535                                 (ip_hdr(skb)->protocol == IPPROTO_TCP) ?
 536                                         1U : 0U;
 537                         dx_buff->is_udp_cso =
 538                                 (ip_hdr(skb)->protocol == IPPROTO_UDP) ?
 539                                         1U : 0U;
 540                 } else if (ip_hdr(skb)->version == 6) {
 541                         dx_buff->is_tcp_cso =
 542                                 (ipv6_hdr(skb)->nexthdr == NEXTHDR_TCP) ?
 543                                         1U : 0U;
 544                         dx_buff->is_udp_cso =
 545                                 (ipv6_hdr(skb)->nexthdr == NEXTHDR_UDP) ?
 546                                         1U : 0U;
 547                 }
 548         }
 549
 550         for (; nr_frags--; ++frag_count) {
 551                 unsigned int frag_len = 0U;
 552                 unsigned int buff_offset = 0U;
 553                 unsigned int buff_size = 0U;
 554                 dma_addr_t frag_pa;
 555                 skb_frag_t *frag = &skb_shinfo(skb)->frags[frag_count];
 556
 557                 frag_len = skb_frag_size(frag);
 558
 559                 while (frag_len) {
 560                         if (frag_len > AQ_CFG_TX_FRAME_MAX)
 561                                 buff_size = AQ_CFG_TX_FRAME_MAX;
 562                         else
 563                                 buff_size = frag_len;
 564
 565                         frag_pa = skb_frag_dma_map(aq_nic_get_dev(self),
 566                                                    frag,
 567                                                    buff_offset,
 568                                                    buff_size,
 569                                                    DMA_TO_DEVICE);
 570
 571                         if (unlikely(dma_mapping_error(aq_nic_get_dev(self),
 572                                                        frag_pa)))
 573                                 goto mapping_error;
 574
 575                         dx = aq_ring_next_dx(ring, dx);
 576                         dx_buff = &ring->buff_ring[dx];
 577
 578                         dx_buff->flags = 0U;
 579                         dx_buff->len = buff_size;
 580                         dx_buff->pa = frag_pa;
 581                         dx_buff->is_mapped = 1U;
 582                         dx_buff->eop_index = 0xffffU;
 583
 584                         frag_len -= buff_size;
 585                         buff_offset += buff_size;
 586
 587                         ++ret;
 588                 }
 589         }
 590
 591         first->eop_index = dx;
 592         dx_buff->is_eop = 1U;
 593         dx_buff->skb = skb;
 594         goto exit;
 595
 596 mapping_error:
 597         for (dx = ring->sw_tail;
 598              ret > 0;
 599              --ret, dx = aq_ring_next_dx(ring, dx)) {
 600                 dx_buff = &ring->buff_ring[dx];
 601
 602                 if (!dx_buff->is_txc && dx_buff->pa) {
 603                         if (unlikely(dx_buff->is_sop)) {
 604                                 dma_unmap_single(aq_nic_get_dev(self),
 605                                                  dx_buff->pa,
 606                                                  dx_buff->len,
 607                                                  DMA_TO_DEVICE);
 608                         } else {
 609                                 dma_unmap_page(aq_nic_get_dev(self),
 610                                                dx_buff->pa,
 611                                                dx_buff->len,
 612                                                DMA_TO_DEVICE);
 613                         }
 614                 }
 615         }
 616
 617 exit:
 618         return ret;
 619 }
 620
 621 int aq_nic_xmit(struct aq_nic_s *self, struct sk_buff *skb)
 622 {
 623         struct aq_ring_s *ring = NULL;
 624         unsigned int frags = 0U;
 625         unsigned int vec = skb->queue_mapping % self->aq_nic_cfg.vecs;
 626         unsigned int tc = 0U;
 627         int err = NETDEV_TX_OK;
 628
 629         frags = skb_shinfo(skb)->nr_frags + 1;
 630
 631         ring = self->aq_ring_tx[AQ_NIC_TCVEC2RING(self, tc, vec)];
 632
 633         if (frags > AQ_CFG_SKB_FRAGS_MAX) {
 634                 dev_kfree_skb_any(skb);
 635                 goto err_exit;
 636         }
 637
 638         aq_ring_update_queue_state(ring);
 639
 640         /* Above status update may stop the queue. Check this. */
 641         if (__netif_subqueue_stopped(self->ndev, ring->idx)) {
 642                 err = NETDEV_TX_BUSY;
 643                 goto err_exit;
 644         }
 645
 646         frags = aq_nic_map_skb(self, skb, ring);
 647
 648         if (likely(frags)) {
 649                 err = self->aq_hw_ops.hw_ring_tx_xmit(self->aq_hw,
 650                                                       ring,
 651                                                       frags);
 652                 if (err >= 0) {
 653                         ++ring->stats.tx.packets;
 654                         ring->stats.tx.bytes += skb->len;
 655                 }
 656         } else {
 657                 err = NETDEV_TX_BUSY;
 658         }
 659
 660 err_exit:
 661         return err;
 662 }
 663
 664 int aq_nic_update_interrupt_moderation_settings(struct aq_nic_s *self)
 665 {
 666         return self->aq_hw_ops.hw_interrupt_moderation_set(self->aq_hw);
 667 }
 668
 669 int aq_nic_set_packet_filter(struct aq_nic_s *self, unsigned int flags)
 670 {
 671         int err = 0;
 672
 673         err = self->aq_hw_ops.hw_packet_filter_set(self->aq_hw, flags);
 674         if (err < 0)
 675                 goto err_exit;
 676
 677         self->packet_filter = flags;
 678
 679 err_exit:
 680         return err;
 681 }
 682
 683 int aq_nic_set_multicast_list(struct aq_nic_s *self, struct net_device *ndev)
 684 {
 685         struct netdev_hw_addr *ha = NULL;
 686         unsigned int i = 0U;
 687
 688         self->mc_list.count = 0U;
 689
 690         netdev_for_each_mc_addr(ha, ndev) {
 691                 ether_addr_copy(self->mc_list.ar[i++], ha->addr);
 692                 ++self->mc_list.count;
 693
 694                 if (i >= AQ_CFG_MULTICAST_ADDRESS_MAX)
 695                         break;
 696         }
 697
 698         if (i >= AQ_CFG_MULTICAST_ADDRESS_MAX) {
 699                 /* Number of filters is too big: atlantic does not support this.
 700                  * Force all multi filter to support this.
 701                  * With this we disable all UC filters and setup "all pass"
 702                  * multicast mask
 703                  */
 704                 self->packet_filter |= IFF_ALLMULTI;
 705                 self->aq_hw->aq_nic_cfg->mc_list_count = 0;
 706                 return self->aq_hw_ops.hw_packet_filter_set(self->aq_hw,
 707                                                         self->packet_filter);
 708         } else {
 709                 return self->aq_hw_ops.hw_multicast_list_set(self->aq_hw,
 710                                                     self->mc_list.ar,
 711                                                     self->mc_list.count);
 712         }
 713 }
 714
 715 int aq_nic_set_mtu(struct aq_nic_s *self, int new_mtu)
 716 {
 717         self->aq_nic_cfg.mtu = new_mtu;
 718
 719         return 0;
 720 }
 721
 722 int aq_nic_set_mac(struct aq_nic_s *self, struct net_device *ndev)
 723 {
 724         return self->aq_hw_ops.hw_set_mac_address(self->aq_hw, ndev->dev_addr);
 725 }
 726
 727 unsigned int aq_nic_get_link_speed(struct aq_nic_s *self)
 728 {
 729         return self->link_status.mbps;
 730 }
 731
 732 int aq_nic_get_regs(struct aq_nic_s *self, struct ethtool_regs *regs, void *p)
 733 {
 734         u32 *regs_buff = p;
 735         int err = 0;
 736
 737         regs->version = 1;
 738
 739         err = self->aq_hw_ops.hw_get_regs(self->aq_hw,
 740                                           &self->aq_hw_caps, regs_buff);
 741         if (err < 0)
 742                 goto err_exit;
 743
 744 err_exit:
 745         return err;
 746 }
 747
 748 int aq_nic_get_regs_count(struct aq_nic_s *self)
 749 {
 750         return self->aq_hw_caps.mac_regs_count;
 751 }
 752
 753 void aq_nic_get_stats(struct aq_nic_s *self, u64 *data)
 754 {
 755         struct aq_vec_s *aq_vec = NULL;
 756         unsigned int i = 0U;
 757         unsigned int count = 0U;
 758         int err = 0;
 759
 760         err = self->aq_hw_ops.hw_get_hw_stats(self->aq_hw, data, &count);
 761         if (err < 0)
 762                 goto err_exit;
 763
 764         data += count;
 765         count = 0U;
 766
 767         for (i = 0U, aq_vec = self->aq_vec[0];
 768                 aq_vec && self->aq_vecs > i; ++i, aq_vec = self->aq_vec[i]) {
 769                 data += count;
 770                 aq_vec_get_sw_stats(aq_vec, data, &count);
 771         }
 772
 773 err_exit:;
 774         (void)err;
 775 }
 776
 777 void aq_nic_get_link_ksettings(struct aq_nic_s *self,
 778                                struct ethtool_link_ksettings *cmd)
 779 {
 780         cmd->base.port = PORT_TP;
 781         /* This driver supports only 10G capable adapters, so DUPLEX_FULL */
 782         cmd->base.duplex = DUPLEX_FULL;
 783         cmd->base.autoneg = self->aq_nic_cfg.is_autoneg;
 784
 785         ethtool_link_ksettings_zero_link_mode(cmd, supported);
 786
 787         if (self->aq_hw_caps.link_speed_msk & AQ_NIC_RATE_10G)
 788                 ethtool_link_ksettings_add_link_mode(cmd, supported,
 789                                                      10000baseT_Full);
 790
 791         if (self->aq_hw_caps.link_speed_msk & AQ_NIC_RATE_5G)
 792                 ethtool_link_ksettings_add_link_mode(cmd, supported,
 793                                                      5000baseT_Full);
 794
 795         if (self->aq_hw_caps.link_speed_msk & AQ_NIC_RATE_2GS)
 796                 ethtool_link_ksettings_add_link_mode(cmd, supported,
 797                                                      2500baseT_Full);
 798
 799         if (self->aq_hw_caps.link_speed_msk & AQ_NIC_RATE_1G)
 800                 ethtool_link_ksettings_add_link_mode(cmd, supported,
 801                                                      1000baseT_Full);
 802
 803         if (self->aq_hw_caps.link_speed_msk & AQ_NIC_RATE_100M)
 804                 ethtool_link_ksettings_add_link_mode(cmd, supported,
 805                                                      100baseT_Full);
 806
 807         if (self->aq_hw_caps.flow_control)
 808                 ethtool_link_ksettings_add_link_mode(cmd, supported,
 809                                                      Pause);
 810
 811         ethtool_link_ksettings_add_link_mode(cmd, supported, Autoneg);
 812         ethtool_link_ksettings_add_link_mode(cmd, supported, TP);
 813
 814         ethtool_link_ksettings_zero_link_mode(cmd, advertising);
 815
 816         if (self->aq_nic_cfg.is_autoneg)
 817                 ethtool_link_ksettings_add_link_mode(cmd, advertising, Autoneg);
 818
 819         if (self->aq_nic_cfg.link_speed_msk  & AQ_NIC_RATE_10G)
 820                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
 821                                                      10000baseT_Full);
 822
 823         if (self->aq_nic_cfg.link_speed_msk  & AQ_NIC_RATE_5G)
 824                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
 825                                                      5000baseT_Full);
 826
 827         if (self->aq_nic_cfg.link_speed_msk  & AQ_NIC_RATE_2GS)
 828                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
 829                                                      2500baseT_Full);
 830
 831         if (self->aq_nic_cfg.link_speed_msk  & AQ_NIC_RATE_1G)
 832                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
 833                                                      1000baseT_Full);
 834
 835         if (self->aq_nic_cfg.link_speed_msk  & AQ_NIC_RATE_100M)
 836                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
 837                                                      100baseT_Full);
 838
 839         if (self->aq_nic_cfg.flow_control)
 840                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
 841                                                      Pause);
 842
 843         ethtool_link_ksettings_add_link_mode(cmd, advertising, TP);
 844 }
 845
 846 int aq_nic_set_link_ksettings(struct aq_nic_s *self,
 847                               const struct ethtool_link_ksettings *cmd)
 848 {
 849         u32 speed = 0U;
 850         u32 rate = 0U;
 851         int err = 0;
 852
 853         if (cmd->base.autoneg == AUTONEG_ENABLE) {
 854                 rate = self->aq_hw_caps.link_speed_msk;
 855                 self->aq_nic_cfg.is_autoneg = true;
 856         } else {
 857                 speed = cmd->base.speed;
 858
 859                 switch (speed) {
 860                 case SPEED_100:
 861                         rate = AQ_NIC_RATE_100M;
 862                         break;
 863
 864                 case SPEED_1000:
 865                         rate = AQ_NIC_RATE_1G;
 866                         break;
 867
 868                 case SPEED_2500:
 869                         rate = AQ_NIC_RATE_2GS;
 870                         break;
 871
 872                 case SPEED_5000:
 873                         rate = AQ_NIC_RATE_5G;
 874                         break;
 875
 876                 case SPEED_10000:
 877                         rate = AQ_NIC_RATE_10G;
 878                         break;
 879
 880                 default:
 881                         err = -1;
 882                         goto err_exit;
 883                 break;
 884                 }
 885                 if (!(self->aq_hw_caps.link_speed_msk & rate)) {
 886                         err = -1;
 887                         goto err_exit;
 888                 }
 889
 890                 self->aq_nic_cfg.is_autoneg = false;
 891         }
 892
 893         err = self->aq_hw_ops.hw_set_link_speed(self->aq_hw, rate);
 894         if (err < 0)
 895                 goto err_exit;
 896
 897         self->aq_nic_cfg.link_speed_msk = rate;
 898
 899 err_exit:
 900         return err;
 901 }
 902
 903 struct aq_nic_cfg_s *aq_nic_get_cfg(struct aq_nic_s *self)
 904 {
 905         return &self->aq_nic_cfg;
 906 }
 907
 908 u32 aq_nic_get_fw_version(struct aq_nic_s *self)
 909 {
 910         u32 fw_version = 0U;
 911
 912         self->aq_hw_ops.hw_get_fw_version(self->aq_hw, &fw_version);
 913
 914         return fw_version;
 915 }
 916
 917 int aq_nic_stop(struct aq_nic_s *self)
 918 {
 919         struct aq_vec_s *aq_vec = NULL;
 920         unsigned int i = 0U;
 921
 922         netif_tx_disable(self->ndev);
 923         netif_carrier_off(self->ndev);
 924
 925         del_timer_sync(&self->service_timer);
 926
 927         self->aq_hw_ops.hw_irq_disable(self->aq_hw, AQ_CFG_IRQ_MASK);
 928
 929         if (self->aq_nic_cfg.is_polling)
 930                 del_timer_sync(&self->polling_timer);
 931         else
 932                 aq_pci_func_free_irqs(self->aq_pci_func);
 933
 934         for (i = 0U, aq_vec = self->aq_vec[0];
 935                 self->aq_vecs > i; ++i, aq_vec = self->aq_vec[i])
 936                 aq_vec_stop(aq_vec);
 937
 938         return self->aq_hw_ops.hw_stop(self->aq_hw);
 939 }
 940
 941 void aq_nic_deinit(struct aq_nic_s *self)
 942 {
 943         struct aq_vec_s *aq_vec = NULL;
 944         unsigned int i = 0U;
 945
 946         if (!self)
 947                 goto err_exit;
 948
 949         for (i = 0U, aq_vec = self->aq_vec[0];
 950                 self->aq_vecs > i; ++i, aq_vec = self->aq_vec[i])
 951                 aq_vec_deinit(aq_vec);
 952
 953         if (self->power_state == AQ_HW_POWER_STATE_D0) {
 954                 (void)self->aq_hw_ops.hw_deinit(self->aq_hw);
 955         } else {
 956                 (void)self->aq_hw_ops.hw_set_power(self->aq_hw,
 957                                                    self->power_state);
 958         }
 959
 960 err_exit:;
 961 }
 962
 963 void aq_nic_free_hot_resources(struct aq_nic_s *self)
 964 {
 965         unsigned int i = 0U;
 966
 967         if (!self)
 968                 goto err_exit;
 969
 970         for (i = AQ_DIMOF(self->aq_vec); i--;) {
 971                 if (self->aq_vec[i]) {
 972                         aq_vec_free(self->aq_vec[i]);
 973                         self->aq_vec[i] = NULL;
 974                 }
 975         }
 976
 977 err_exit:;
 978 }
 979
 980 int aq_nic_change_pm_state(struct aq_nic_s *self, pm_message_t *pm_msg)
 981 {
 982         int err = 0;
 983
 984         if (!netif_running(self->ndev)) {
 985                 err = 0;
 986                 goto out;
 987         }
 988         rtnl_lock();
 989         if (pm_msg->event & PM_EVENT_SLEEP || pm_msg->event & PM_EVENT_FREEZE) {
 990                 self->power_state = AQ_HW_POWER_STATE_D3;
 991                 netif_device_detach(self->ndev);
 992                 netif_tx_stop_all_queues(self->ndev);
 993
 994                 err = aq_nic_stop(self);
 995                 if (err < 0)
 996                         goto err_exit;
 997
 998                 aq_nic_deinit(self);
 999         } else {
1000                 err = aq_nic_init(self);
1001                 if (err < 0)
1002                         goto err_exit;
1003
1004                 err = aq_nic_start(self);
1005                 if (err < 0)
1006                         goto err_exit;
1007
1008                 netif_device_attach(self->ndev);
1009                 netif_tx_start_all_queues(self->ndev);
1010         }
1011
1012 err_exit:
1013         rtnl_unlock();
1014 out:
1015         return err;
1016 }