drivers/net/ethernet/qlogic/qede/qede_main.c

   1 /* QLogic qede NIC Driver
   2 * Copyright (c) 2015 QLogic Corporation
   3 *
   4 * This software is available under the terms of the GNU General Public License
   5 * (GPL) Version 2, available from the file COPYING in the main directory of
   6 * this source tree.
   7 */
   8
   9 #include <linux/module.h>
  10 #include <linux/pci.h>
  11 #include <linux/version.h>
  12 #include <linux/device.h>
  13 #include <linux/netdevice.h>
  14 #include <linux/etherdevice.h>
  15 #include <linux/skbuff.h>
  16 #include <linux/errno.h>
  17 #include <linux/list.h>
  18 #include <linux/string.h>
  19 #include <linux/dma-mapping.h>
  20 #include <linux/interrupt.h>
  21 #include <asm/byteorder.h>
  22 #include <asm/param.h>
  23 #include <linux/io.h>
  24 #include <linux/netdev_features.h>
  25 #include <linux/udp.h>
  26 #include <linux/tcp.h>
  27 #include <net/vxlan.h>
  28 #include <linux/ip.h>
  29 #include <net/ipv6.h>
  30 #include <net/tcp.h>
  31 #include <linux/if_ether.h>
  32 #include <linux/if_vlan.h>
  33 #include <linux/pkt_sched.h>
  34 #include <linux/ethtool.h>
  35 #include <linux/in.h>
  36 #include <linux/random.h>
  37 #include <net/ip6_checksum.h>
  38 #include <linux/bitops.h>
  39
  40 #include "qede.h"
  41
  42 static char version[] =
  43         "QLogic FastLinQ 4xxxx Ethernet Driver qede " DRV_MODULE_VERSION "\n";
  44
  45 MODULE_DESCRIPTION("QLogic FastLinQ 4xxxx Ethernet Driver");
  46 MODULE_LICENSE("GPL");
  47 MODULE_VERSION(DRV_MODULE_VERSION);
  48
  49 static uint debug;
  50 module_param(debug, uint, 0);
  51 MODULE_PARM_DESC(debug, " Default debug msglevel");
  52
  53 static const struct qed_eth_ops *qed_ops;
  54
  55 #define CHIP_NUM_57980S_40              0x1634
  56 #define CHIP_NUM_57980S_10              0x1666
  57 #define CHIP_NUM_57980S_MF              0x1636
  58 #define CHIP_NUM_57980S_100             0x1644
  59 #define CHIP_NUM_57980S_50              0x1654
  60 #define CHIP_NUM_57980S_25              0x1656
  61
  62 #ifndef PCI_DEVICE_ID_NX2_57980E
  63 #define PCI_DEVICE_ID_57980S_40         CHIP_NUM_57980S_40
  64 #define PCI_DEVICE_ID_57980S_10         CHIP_NUM_57980S_10
  65 #define PCI_DEVICE_ID_57980S_MF         CHIP_NUM_57980S_MF
  66 #define PCI_DEVICE_ID_57980S_100        CHIP_NUM_57980S_100
  67 #define PCI_DEVICE_ID_57980S_50         CHIP_NUM_57980S_50
  68 #define PCI_DEVICE_ID_57980S_25         CHIP_NUM_57980S_25
  69 #endif
  70
  71 static const struct pci_device_id qede_pci_tbl[] = {
  72         { PCI_VDEVICE(QLOGIC, PCI_DEVICE_ID_57980S_40), 0 },
  73         { PCI_VDEVICE(QLOGIC, PCI_DEVICE_ID_57980S_10), 0 },
  74         { PCI_VDEVICE(QLOGIC, PCI_DEVICE_ID_57980S_MF), 0 },
  75         { PCI_VDEVICE(QLOGIC, PCI_DEVICE_ID_57980S_100), 0 },
  76         { PCI_VDEVICE(QLOGIC, PCI_DEVICE_ID_57980S_50), 0 },
  77         { PCI_VDEVICE(QLOGIC, PCI_DEVICE_ID_57980S_25), 0 },
  78         { 0 }
  79 };
  80
  81 MODULE_DEVICE_TABLE(pci, qede_pci_tbl);
  82
  83 static int qede_probe(struct pci_dev *pdev, const struct pci_device_id *id);
  84
  85 #define TX_TIMEOUT              (5 * HZ)
  86
  87 static void qede_remove(struct pci_dev *pdev);
  88 static int qede_alloc_rx_buffer(struct qede_dev *edev,
  89                                 struct qede_rx_queue *rxq);
  90 static void qede_link_update(void *dev, struct qed_link_output *link);
  91
  92 static struct pci_driver qede_pci_driver = {
  93         .name = "qede",
  94         .id_table = qede_pci_tbl,
  95         .probe = qede_probe,
  96         .remove = qede_remove,
  97 };
  98
  99 static struct qed_eth_cb_ops qede_ll_ops = {
 100         {
 101                 .link_update = qede_link_update,
 102         },
 103 };
 104
 105 static int qede_netdev_event(struct notifier_block *this, unsigned long event,
 106                              void *ptr)
 107 {
 108         struct net_device *ndev = netdev_notifier_info_to_dev(ptr);
 109         struct ethtool_drvinfo drvinfo;
 110         struct qede_dev *edev;
 111
 112         /* Currently only support name change */
 113         if (event != NETDEV_CHANGENAME)
 114                 goto done;
 115
 116         /* Check whether this is a qede device */
 117         if (!ndev || !ndev->ethtool_ops || !ndev->ethtool_ops->get_drvinfo)
 118                 goto done;
 119
 120         memset(&drvinfo, 0, sizeof(drvinfo));
 121         ndev->ethtool_ops->get_drvinfo(ndev, &drvinfo);
 122         if (strcmp(drvinfo.driver, "qede"))
 123                 goto done;
 124         edev = netdev_priv(ndev);
 125
 126         /* Notify qed of the name change */
 127         if (!edev->ops || !edev->ops->common)
 128                 goto done;
 129         edev->ops->common->set_id(edev->cdev, edev->ndev->name,
 130                                   "qede");
 131
 132 done:
 133         return NOTIFY_DONE;
 134 }
 135
 136 static struct notifier_block qede_netdev_notifier = {
 137         .notifier_call = qede_netdev_event,
 138 };
 139
 140 static
 141 int __init qede_init(void)
 142 {
 143         int ret;
 144         u32 qed_ver;
 145
 146         pr_notice("qede_init: %s\n", version);
 147
 148         qed_ver = qed_get_protocol_version(QED_PROTOCOL_ETH);
 149         if (qed_ver !=  QEDE_ETH_INTERFACE_VERSION) {
 150                 pr_notice("Version mismatch [%08x != %08x]\n",
 151                           qed_ver,
 152                           QEDE_ETH_INTERFACE_VERSION);
 153                 return -EINVAL;
 154         }
 155
 156         qed_ops = qed_get_eth_ops(QEDE_ETH_INTERFACE_VERSION);
 157         if (!qed_ops) {
 158                 pr_notice("Failed to get qed ethtool operations\n");
 159                 return -EINVAL;
 160         }
 161
 162         /* Must register notifier before pci ops, since we might miss
 163          * interface rename after pci probe and netdev registeration.
 164          */
 165         ret = register_netdevice_notifier(&qede_netdev_notifier);
 166         if (ret) {
 167                 pr_notice("Failed to register netdevice_notifier\n");
 168                 qed_put_eth_ops();
 169                 return -EINVAL;
 170         }
 171
 172         ret = pci_register_driver(&qede_pci_driver);
 173         if (ret) {
 174                 pr_notice("Failed to register driver\n");
 175                 unregister_netdevice_notifier(&qede_netdev_notifier);
 176                 qed_put_eth_ops();
 177                 return -EINVAL;
 178         }
 179
 180         return 0;
 181 }
 182
 183 static void __exit qede_cleanup(void)
 184 {
 185         pr_notice("qede_cleanup called\n");
 186
 187         unregister_netdevice_notifier(&qede_netdev_notifier);
 188         pci_unregister_driver(&qede_pci_driver);
 189         qed_put_eth_ops();
 190 }
 191
 192 module_init(qede_init);
 193 module_exit(qede_cleanup);
 194
 195 /* -------------------------------------------------------------------------
 196  * START OF FAST-PATH
 197  * -------------------------------------------------------------------------
 198  */
 199
 200 /* Unmap the data and free skb */
 201 static int qede_free_tx_pkt(struct qede_dev *edev,
 202                             struct qede_tx_queue *txq,
 203                             int *len)
 204 {
 205         u16 idx = txq->sw_tx_cons & NUM_TX_BDS_MAX;
 206         struct sk_buff *skb = txq->sw_tx_ring[idx].skb;
 207         struct eth_tx_1st_bd *first_bd;
 208         struct eth_tx_bd *tx_data_bd;
 209         int bds_consumed = 0;
 210         int nbds;
 211         bool data_split = txq->sw_tx_ring[idx].flags & QEDE_TSO_SPLIT_BD;
 212         int i, split_bd_len = 0;
 213
 214         if (unlikely(!skb)) {
 215                 DP_ERR(edev,
 216                        "skb is null for txq idx=%d txq->sw_tx_cons=%d txq->sw_tx_prod=%d\n",
 217                        idx, txq->sw_tx_cons, txq->sw_tx_prod);
 218                 return -1;
 219         }
 220
 221         *len = skb->len;
 222
 223         first_bd = (struct eth_tx_1st_bd *)qed_chain_consume(&txq->tx_pbl);
 224
 225         bds_consumed++;
 226
 227         nbds = first_bd->data.nbds;
 228
 229         if (data_split) {
 230                 struct eth_tx_bd *split = (struct eth_tx_bd *)
 231                         qed_chain_consume(&txq->tx_pbl);
 232                 split_bd_len = BD_UNMAP_LEN(split);
 233                 bds_consumed++;
 234         }
 235         dma_unmap_page(&edev->pdev->dev, BD_UNMAP_ADDR(first_bd),
 236                        BD_UNMAP_LEN(first_bd) + split_bd_len, DMA_TO_DEVICE);
 237
 238         /* Unmap the data of the skb frags */
 239         for (i = 0; i < skb_shinfo(skb)->nr_frags; i++, bds_consumed++) {
 240                 tx_data_bd = (struct eth_tx_bd *)
 241                         qed_chain_consume(&txq->tx_pbl);
 242                 dma_unmap_page(&edev->pdev->dev, BD_UNMAP_ADDR(tx_data_bd),
 243                                BD_UNMAP_LEN(tx_data_bd), DMA_TO_DEVICE);
 244         }
 245
 246         while (bds_consumed++ < nbds)
 247                 qed_chain_consume(&txq->tx_pbl);
 248
 249         /* Free skb */
 250         dev_kfree_skb_any(skb);
 251         txq->sw_tx_ring[idx].skb = NULL;
 252         txq->sw_tx_ring[idx].flags = 0;
 253
 254         return 0;
 255 }
 256
 257 /* Unmap the data and free skb when mapping failed during start_xmit */
 258 static void qede_free_failed_tx_pkt(struct qede_dev *edev,
 259                                     struct qede_tx_queue *txq,
 260                                     struct eth_tx_1st_bd *first_bd,
 261                                     int nbd,
 262                                     bool data_split)
 263 {
 264         u16 idx = txq->sw_tx_prod & NUM_TX_BDS_MAX;
 265         struct sk_buff *skb = txq->sw_tx_ring[idx].skb;
 266         struct eth_tx_bd *tx_data_bd;
 267         int i, split_bd_len = 0;
 268
 269         /* Return prod to its position before this skb was handled */
 270         qed_chain_set_prod(&txq->tx_pbl,
 271                            le16_to_cpu(txq->tx_db.data.bd_prod),
 272                            first_bd);
 273
 274         first_bd = (struct eth_tx_1st_bd *)qed_chain_produce(&txq->tx_pbl);
 275
 276         if (data_split) {
 277                 struct eth_tx_bd *split = (struct eth_tx_bd *)
 278                                           qed_chain_produce(&txq->tx_pbl);
 279                 split_bd_len = BD_UNMAP_LEN(split);
 280                 nbd--;
 281         }
 282
 283         dma_unmap_page(&edev->pdev->dev, BD_UNMAP_ADDR(first_bd),
 284                        BD_UNMAP_LEN(first_bd) + split_bd_len, DMA_TO_DEVICE);
 285
 286         /* Unmap the data of the skb frags */
 287         for (i = 0; i < nbd; i++) {
 288                 tx_data_bd = (struct eth_tx_bd *)
 289                         qed_chain_produce(&txq->tx_pbl);
 290                 if (tx_data_bd->nbytes)
 291                         dma_unmap_page(&edev->pdev->dev,
 292                                        BD_UNMAP_ADDR(tx_data_bd),
 293                                        BD_UNMAP_LEN(tx_data_bd), DMA_TO_DEVICE);
 294         }
 295
 296         /* Return again prod to its position before this skb was handled */
 297         qed_chain_set_prod(&txq->tx_pbl,
 298                            le16_to_cpu(txq->tx_db.data.bd_prod),
 299                            first_bd);
 300
 301         /* Free skb */
 302         dev_kfree_skb_any(skb);
 303         txq->sw_tx_ring[idx].skb = NULL;
 304         txq->sw_tx_ring[idx].flags = 0;
 305 }
 306
 307 static u32 qede_xmit_type(struct qede_dev *edev,
 308                           struct sk_buff *skb,
 309                           int *ipv6_ext)
 310 {
 311         u32 rc = XMIT_L4_CSUM;
 312         __be16 l3_proto;
 313
 314         if (skb->ip_summed != CHECKSUM_PARTIAL)
 315                 return XMIT_PLAIN;
 316
 317         l3_proto = vlan_get_protocol(skb);
 318         if (l3_proto == htons(ETH_P_IPV6) &&
 319             (ipv6_hdr(skb)->nexthdr == NEXTHDR_IPV6))
 320                 *ipv6_ext = 1;
 321
 322         if (skb_is_gso(skb))
 323                 rc |= XMIT_LSO;
 324
 325         return rc;
 326 }
 327
 328 static void qede_set_params_for_ipv6_ext(struct sk_buff *skb,
 329                                          struct eth_tx_2nd_bd *second_bd,
 330                                          struct eth_tx_3rd_bd *third_bd)
 331 {
 332         u8 l4_proto;
 333         u16 bd2_bits1 = 0, bd2_bits2 = 0;
 334
 335         bd2_bits1 |= (1 << ETH_TX_DATA_2ND_BD_IPV6_EXT_SHIFT);
 336
 337         bd2_bits2 |= ((((u8 *)skb_transport_header(skb) - skb->data) >> 1) &
 338                      ETH_TX_DATA_2ND_BD_L4_HDR_START_OFFSET_W_MASK)
 339                     << ETH_TX_DATA_2ND_BD_L4_HDR_START_OFFSET_W_SHIFT;
 340
 341         bd2_bits1 |= (ETH_L4_PSEUDO_CSUM_CORRECT_LENGTH <<
 342                       ETH_TX_DATA_2ND_BD_L4_PSEUDO_CSUM_MODE_SHIFT);
 343
 344         if (vlan_get_protocol(skb) == htons(ETH_P_IPV6))
 345                 l4_proto = ipv6_hdr(skb)->nexthdr;
 346         else
 347                 l4_proto = ip_hdr(skb)->protocol;
 348
 349         if (l4_proto == IPPROTO_UDP)
 350                 bd2_bits1 |= 1 << ETH_TX_DATA_2ND_BD_L4_UDP_SHIFT;
 351
 352         if (third_bd)
 353                 third_bd->data.bitfields |=
 354                         cpu_to_le16(((tcp_hdrlen(skb) / 4) &
 355                                 ETH_TX_DATA_3RD_BD_TCP_HDR_LEN_DW_MASK) <<
 356                                 ETH_TX_DATA_3RD_BD_TCP_HDR_LEN_DW_SHIFT);
 357
 358         second_bd->data.bitfields1 = cpu_to_le16(bd2_bits1);
 359         second_bd->data.bitfields2 = cpu_to_le16(bd2_bits2);
 360 }
 361
 362 static int map_frag_to_bd(struct qede_dev *edev,
 363                           skb_frag_t *frag,
 364                           struct eth_tx_bd *bd)
 365 {
 366         dma_addr_t mapping;
 367
 368         /* Map skb non-linear frag data for DMA */
 369         mapping = skb_frag_dma_map(&edev->pdev->dev, frag, 0,
 370                                    skb_frag_size(frag),
 371                                    DMA_TO_DEVICE);
 372         if (unlikely(dma_mapping_error(&edev->pdev->dev, mapping))) {
 373                 DP_NOTICE(edev, "Unable to map frag - dropping packet\n");
 374                 return -ENOMEM;
 375         }
 376
 377         /* Setup the data pointer of the frag data */
 378         BD_SET_UNMAP_ADDR_LEN(bd, mapping, skb_frag_size(frag));
 379
 380         return 0;
 381 }
 382
 383 /* +2 for 1st BD for headers and 2nd BD for headlen (if required) */
 384 #if ((MAX_SKB_FRAGS + 2) > ETH_TX_MAX_BDS_PER_NON_LSO_PACKET)
 385 static bool qede_pkt_req_lin(struct qede_dev *edev, struct sk_buff *skb,
 386                              u8 xmit_type)
 387 {
 388         int allowed_frags = ETH_TX_MAX_BDS_PER_NON_LSO_PACKET - 1;
 389
 390         if (xmit_type & XMIT_LSO) {
 391                 int hlen;
 392
 393                 hlen = skb_transport_header(skb) +
 394                        tcp_hdrlen(skb) - skb->data;
 395
 396                 /* linear payload would require its own BD */
 397                 if (skb_headlen(skb) > hlen)
 398                         allowed_frags--;
 399         }
 400
 401         return (skb_shinfo(skb)->nr_frags > allowed_frags);
 402 }
 403 #endif
 404
 405 /* Main transmit function */
 406 static
 407 netdev_tx_t qede_start_xmit(struct sk_buff *skb,
 408                             struct net_device *ndev)
 409 {
 410         struct qede_dev *edev = netdev_priv(ndev);
 411         struct netdev_queue *netdev_txq;
 412         struct qede_tx_queue *txq;
 413         struct eth_tx_1st_bd *first_bd;
 414         struct eth_tx_2nd_bd *second_bd = NULL;
 415         struct eth_tx_3rd_bd *third_bd = NULL;
 416         struct eth_tx_bd *tx_data_bd = NULL;
 417         u16 txq_index;
 418         u8 nbd = 0;
 419         dma_addr_t mapping;
 420         int rc, frag_idx = 0, ipv6_ext = 0;
 421         u8 xmit_type;
 422         u16 idx;
 423         u16 hlen;
 424         bool data_split = false;
 425
 426         /* Get tx-queue context and netdev index */
 427         txq_index = skb_get_queue_mapping(skb);
 428         WARN_ON(txq_index >= QEDE_TSS_CNT(edev));
 429         txq = QEDE_TX_QUEUE(edev, txq_index);
 430         netdev_txq = netdev_get_tx_queue(ndev, txq_index);
 431
 432         WARN_ON(qed_chain_get_elem_left(&txq->tx_pbl) <
 433                                (MAX_SKB_FRAGS + 1));
 434
 435         xmit_type = qede_xmit_type(edev, skb, &ipv6_ext);
 436
 437 #if ((MAX_SKB_FRAGS + 2) > ETH_TX_MAX_BDS_PER_NON_LSO_PACKET)
 438         if (qede_pkt_req_lin(edev, skb, xmit_type)) {
 439                 if (skb_linearize(skb)) {
 440                         DP_NOTICE(edev,
 441                                   "SKB linearization failed - silently dropping this SKB\n");
 442                         dev_kfree_skb_any(skb);
 443                         return NETDEV_TX_OK;
 444                 }
 445         }
 446 #endif
 447
 448         /* Fill the entry in the SW ring and the BDs in the FW ring */
 449         idx = txq->sw_tx_prod & NUM_TX_BDS_MAX;
 450         txq->sw_tx_ring[idx].skb = skb;
 451         first_bd = (struct eth_tx_1st_bd *)
 452                    qed_chain_produce(&txq->tx_pbl);
 453         memset(first_bd, 0, sizeof(*first_bd));
 454         first_bd->data.bd_flags.bitfields =
 455                 1 << ETH_TX_1ST_BD_FLAGS_START_BD_SHIFT;
 456
 457         /* Map skb linear data for DMA and set in the first BD */
 458         mapping = dma_map_single(&edev->pdev->dev, skb->data,
 459                                  skb_headlen(skb), DMA_TO_DEVICE);
 460         if (unlikely(dma_mapping_error(&edev->pdev->dev, mapping))) {
 461                 DP_NOTICE(edev, "SKB mapping failed\n");
 462                 qede_free_failed_tx_pkt(edev, txq, first_bd, 0, false);
 463                 return NETDEV_TX_OK;
 464         }
 465         nbd++;
 466         BD_SET_UNMAP_ADDR_LEN(first_bd, mapping, skb_headlen(skb));
 467
 468         /* In case there is IPv6 with extension headers or LSO we need 2nd and
 469          * 3rd BDs.
 470          */
 471         if (unlikely((xmit_type & XMIT_LSO) | ipv6_ext)) {
 472                 second_bd = (struct eth_tx_2nd_bd *)
 473                         qed_chain_produce(&txq->tx_pbl);
 474                 memset(second_bd, 0, sizeof(*second_bd));
 475
 476                 nbd++;
 477                 third_bd = (struct eth_tx_3rd_bd *)
 478                         qed_chain_produce(&txq->tx_pbl);
 479                 memset(third_bd, 0, sizeof(*third_bd));
 480
 481                 nbd++;
 482                 /* We need to fill in additional data in second_bd... */
 483                 tx_data_bd = (struct eth_tx_bd *)second_bd;
 484         }
 485
 486         if (skb_vlan_tag_present(skb)) {
 487                 first_bd->data.vlan = cpu_to_le16(skb_vlan_tag_get(skb));
 488                 first_bd->data.bd_flags.bitfields |=
 489                         1 << ETH_TX_1ST_BD_FLAGS_VLAN_INSERTION_SHIFT;
 490         }
 491
 492         /* Fill the parsing flags & params according to the requested offload */
 493         if (xmit_type & XMIT_L4_CSUM) {
 494                 u16 temp = 1 << ETH_TX_DATA_1ST_BD_TUNN_CFG_OVERRIDE_SHIFT;
 495
 496                 /* We don't re-calculate IP checksum as it is already done by
 497                  * the upper stack
 498                  */
 499                 first_bd->data.bd_flags.bitfields |=
 500                         1 << ETH_TX_1ST_BD_FLAGS_L4_CSUM_SHIFT;
 501
 502                 first_bd->data.bitfields |= cpu_to_le16(temp);
 503
 504                 /* If the packet is IPv6 with extension header, indicate that
 505                  * to FW and pass few params, since the device cracker doesn't
 506                  * support parsing IPv6 with extension header/s.
 507                  */
 508                 if (unlikely(ipv6_ext))
 509                         qede_set_params_for_ipv6_ext(skb, second_bd, third_bd);
 510         }
 511
 512         if (xmit_type & XMIT_LSO) {
 513                 first_bd->data.bd_flags.bitfields |=
 514                         (1 << ETH_TX_1ST_BD_FLAGS_LSO_SHIFT);
 515                 third_bd->data.lso_mss =
 516                         cpu_to_le16(skb_shinfo(skb)->gso_size);
 517
 518                 first_bd->data.bd_flags.bitfields |=
 519                 1 << ETH_TX_1ST_BD_FLAGS_IP_CSUM_SHIFT;
 520                 hlen = skb_transport_header(skb) +
 521                        tcp_hdrlen(skb) - skb->data;
 522
 523                 /* @@@TBD - if will not be removed need to check */
 524                 third_bd->data.bitfields |=
 525                         cpu_to_le16((1 << ETH_TX_DATA_3RD_BD_HDR_NBD_SHIFT));
 526
 527                 /* Make life easier for FW guys who can't deal with header and
 528                  * data on same BD. If we need to split, use the second bd...
 529                  */
 530                 if (unlikely(skb_headlen(skb) > hlen)) {
 531                         DP_VERBOSE(edev, NETIF_MSG_TX_QUEUED,
 532                                    "TSO split header size is %d (%x:%x)\n",
 533                                    first_bd->nbytes, first_bd->addr.hi,
 534                                    first_bd->addr.lo);
 535
 536                         mapping = HILO_U64(le32_to_cpu(first_bd->addr.hi),
 537                                            le32_to_cpu(first_bd->addr.lo)) +
 538                                            hlen;
 539
 540                         BD_SET_UNMAP_ADDR_LEN(tx_data_bd, mapping,
 541                                               le16_to_cpu(first_bd->nbytes) -
 542                                               hlen);
 543
 544                         /* this marks the BD as one that has no
 545                          * individual mapping
 546                          */
 547                         txq->sw_tx_ring[idx].flags |= QEDE_TSO_SPLIT_BD;
 548
 549                         first_bd->nbytes = cpu_to_le16(hlen);
 550
 551                         tx_data_bd = (struct eth_tx_bd *)third_bd;
 552                         data_split = true;
 553                 }
 554         }
 555
 556         /* Handle fragmented skb */
 557         /* special handle for frags inside 2nd and 3rd bds.. */
 558         while (tx_data_bd && frag_idx < skb_shinfo(skb)->nr_frags) {
 559                 rc = map_frag_to_bd(edev,
 560                                     &skb_shinfo(skb)->frags[frag_idx],
 561                                     tx_data_bd);
 562                 if (rc) {
 563                         qede_free_failed_tx_pkt(edev, txq, first_bd, nbd,
 564                                                 data_split);
 565                         return NETDEV_TX_OK;
 566                 }
 567
 568                 if (tx_data_bd == (struct eth_tx_bd *)second_bd)
 569                         tx_data_bd = (struct eth_tx_bd *)third_bd;
 570                 else
 571                         tx_data_bd = NULL;
 572
 573                 frag_idx++;
 574         }
 575
 576         /* map last frags into 4th, 5th .... */
 577         for (; frag_idx < skb_shinfo(skb)->nr_frags; frag_idx++, nbd++) {
 578                 tx_data_bd = (struct eth_tx_bd *)
 579                              qed_chain_produce(&txq->tx_pbl);
 580
 581                 memset(tx_data_bd, 0, sizeof(*tx_data_bd));
 582
 583                 rc = map_frag_to_bd(edev,
 584                                     &skb_shinfo(skb)->frags[frag_idx],
 585                                     tx_data_bd);
 586                 if (rc) {
 587                         qede_free_failed_tx_pkt(edev, txq, first_bd, nbd,
 588                                                 data_split);
 589                         return NETDEV_TX_OK;
 590                 }
 591         }
 592
 593         /* update the first BD with the actual num BDs */
 594         first_bd->data.nbds = nbd;
 595
 596         netdev_tx_sent_queue(netdev_txq, skb->len);
 597
 598         skb_tx_timestamp(skb);
 599
 600         /* Advance packet producer only before sending the packet since mapping
 601          * of pages may fail.
 602          */
 603         txq->sw_tx_prod++;
 604
 605         /* 'next page' entries are counted in the producer value */
 606         txq->tx_db.data.bd_prod =
 607                 cpu_to_le16(qed_chain_get_prod_idx(&txq->tx_pbl));
 608
 609         /* wmb makes sure that the BDs data is updated before updating the
 610          * producer, otherwise FW may read old data from the BDs.
 611          */
 612         wmb();
 613         barrier();
 614         writel(txq->tx_db.raw, txq->doorbell_addr);
 615
 616         /* mmiowb is needed to synchronize doorbell writes from more than one
 617          * processor. It guarantees that the write arrives to the device before
 618          * the queue lock is released and another start_xmit is called (possibly
 619          * on another CPU). Without this barrier, the next doorbell can bypass
 620          * this doorbell. This is applicable to IA64/Altix systems.
 621          */
 622         mmiowb();
 623
 624         if (unlikely(qed_chain_get_elem_left(&txq->tx_pbl)
 625                       < (MAX_SKB_FRAGS + 1))) {
 626                 netif_tx_stop_queue(netdev_txq);
 627                 DP_VERBOSE(edev, NETIF_MSG_TX_QUEUED,
 628                            "Stop queue was called\n");
 629                 /* paired memory barrier is in qede_tx_int(), we have to keep
 630                  * ordering of set_bit() in netif_tx_stop_queue() and read of
 631                  * fp->bd_tx_cons
 632                  */
 633                 smp_mb();
 634
 635                 if (qed_chain_get_elem_left(&txq->tx_pbl)
 636                      >= (MAX_SKB_FRAGS + 1) &&
 637                     (edev->state == QEDE_STATE_OPEN)) {
 638                         netif_tx_wake_queue(netdev_txq);
 639                         DP_VERBOSE(edev, NETIF_MSG_TX_QUEUED,
 640                                    "Wake queue was called\n");
 641                 }
 642         }
 643
 644         return NETDEV_TX_OK;
 645 }
 646
 647 static int qede_txq_has_work(struct qede_tx_queue *txq)
 648 {
 649         u16 hw_bd_cons;
 650
 651         /* Tell compiler that consumer and producer can change */
 652         barrier();
 653         hw_bd_cons = le16_to_cpu(*txq->hw_cons_ptr);
 654         if (qed_chain_get_cons_idx(&txq->tx_pbl) == hw_bd_cons + 1)
 655                 return 0;
 656
 657         return hw_bd_cons != qed_chain_get_cons_idx(&txq->tx_pbl);
 658 }
 659
 660 static int qede_tx_int(struct qede_dev *edev,
 661                        struct qede_tx_queue *txq)
 662 {
 663         struct netdev_queue *netdev_txq;
 664         u16 hw_bd_cons;
 665         unsigned int pkts_compl = 0, bytes_compl = 0;
 666         int rc;
 667
 668         netdev_txq = netdev_get_tx_queue(edev->ndev, txq->index);
 669
 670         hw_bd_cons = le16_to_cpu(*txq->hw_cons_ptr);
 671         barrier();
 672
 673         while (hw_bd_cons != qed_chain_get_cons_idx(&txq->tx_pbl)) {
 674                 int len = 0;
 675
 676                 rc = qede_free_tx_pkt(edev, txq, &len);
 677                 if (rc) {
 678                         DP_NOTICE(edev, "hw_bd_cons = %d, chain_cons=%d\n",
 679                                   hw_bd_cons,
 680                                   qed_chain_get_cons_idx(&txq->tx_pbl));
 681                         break;
 682                 }
 683
 684                 bytes_compl += len;
 685                 pkts_compl++;
 686                 txq->sw_tx_cons++;
 687         }
 688
 689         netdev_tx_completed_queue(netdev_txq, pkts_compl, bytes_compl);
 690
 691         /* Need to make the tx_bd_cons update visible to start_xmit()
 692          * before checking for netif_tx_queue_stopped().  Without the
 693          * memory barrier, there is a small possibility that
 694          * start_xmit() will miss it and cause the queue to be stopped
 695          * forever.
 696          * On the other hand we need an rmb() here to ensure the proper
 697          * ordering of bit testing in the following
 698          * netif_tx_queue_stopped(txq) call.
 699          */
 700         smp_mb();
 701
 702         if (unlikely(netif_tx_queue_stopped(netdev_txq))) {
 703                 /* Taking tx_lock is needed to prevent reenabling the queue
 704                  * while it's empty. This could have happen if rx_action() gets
 705                  * suspended in qede_tx_int() after the condition before
 706                  * netif_tx_wake_queue(), while tx_action (qede_start_xmit()):
 707                  *
 708                  * stops the queue->sees fresh tx_bd_cons->releases the queue->
 709                  * sends some packets consuming the whole queue again->
 710                  * stops the queue
 711                  */
 712
 713                 __netif_tx_lock(netdev_txq, smp_processor_id());
 714
 715                 if ((netif_tx_queue_stopped(netdev_txq)) &&
 716                     (edev->state == QEDE_STATE_OPEN) &&
 717                     (qed_chain_get_elem_left(&txq->tx_pbl)
 718                       >= (MAX_SKB_FRAGS + 1))) {
 719                         netif_tx_wake_queue(netdev_txq);
 720                         DP_VERBOSE(edev, NETIF_MSG_TX_DONE,
 721                                    "Wake queue was called\n");
 722                 }
 723
 724                 __netif_tx_unlock(netdev_txq);
 725         }
 726
 727         return 0;
 728 }
 729
 730 static bool qede_has_rx_work(struct qede_rx_queue *rxq)
 731 {
 732         u16 hw_comp_cons, sw_comp_cons;
 733
 734         /* Tell compiler that status block fields can change */
 735         barrier();
 736
 737         hw_comp_cons = le16_to_cpu(*rxq->hw_cons_ptr);
 738         sw_comp_cons = qed_chain_get_cons_idx(&rxq->rx_comp_ring);
 739
 740         return hw_comp_cons != sw_comp_cons;
 741 }
 742
 743 static bool qede_has_tx_work(struct qede_fastpath *fp)
 744 {
 745         u8 tc;
 746
 747         for (tc = 0; tc < fp->edev->num_tc; tc++)
 748                 if (qede_txq_has_work(&fp->txqs[tc]))
 749                         return true;
 750         return false;
 751 }
 752
 753 static inline void qede_rx_bd_ring_consume(struct qede_rx_queue *rxq)
 754 {
 755         qed_chain_consume(&rxq->rx_bd_ring);
 756         rxq->sw_rx_cons++;
 757 }
 758
 759 /* This function reuses the buffer(from an offset) from
 760  * consumer index to producer index in the bd ring
 761  */
 762 static inline void qede_reuse_page(struct qede_dev *edev,
 763                                    struct qede_rx_queue *rxq,
 764                                    struct sw_rx_data *curr_cons)
 765 {
 766         struct eth_rx_bd *rx_bd_prod = qed_chain_produce(&rxq->rx_bd_ring);
 767         struct sw_rx_data *curr_prod;
 768         dma_addr_t new_mapping;
 769
 770         curr_prod = &rxq->sw_rx_ring[rxq->sw_rx_prod & NUM_RX_BDS_MAX];
 771         *curr_prod = *curr_cons;
 772
 773         new_mapping = curr_prod->mapping + curr_prod->page_offset;
 774
 775         rx_bd_prod->addr.hi = cpu_to_le32(upper_32_bits(new_mapping));
 776         rx_bd_prod->addr.lo = cpu_to_le32(lower_32_bits(new_mapping));
 777
 778         rxq->sw_rx_prod++;
 779         curr_cons->data = NULL;
 780 }
 781
 782 /* In case of allocation failures reuse buffers
 783  * from consumer index to produce buffers for firmware
 784  */
 785 static void qede_recycle_rx_bd_ring(struct qede_rx_queue *rxq,
 786                                     struct qede_dev *edev, u8 count)
 787 {
 788         struct sw_rx_data *curr_cons;
 789
 790         for (; count > 0; count--) {
 791                 curr_cons = &rxq->sw_rx_ring[rxq->sw_rx_cons & NUM_RX_BDS_MAX];
 792                 qede_reuse_page(edev, rxq, curr_cons);
 793                 qede_rx_bd_ring_consume(rxq);
 794         }
 795 }
 796
 797 static inline int qede_realloc_rx_buffer(struct qede_dev *edev,
 798                                          struct qede_rx_queue *rxq,
 799                                          struct sw_rx_data *curr_cons)
 800 {
 801         /* Move to the next segment in the page */
 802         curr_cons->page_offset += rxq->rx_buf_seg_size;
 803
 804         if (curr_cons->page_offset == PAGE_SIZE) {
 805                 if (unlikely(qede_alloc_rx_buffer(edev, rxq))) {
 806                         /* Since we failed to allocate new buffer
 807                          * current buffer can be used again.
 808                          */
 809                         curr_cons->page_offset -= rxq->rx_buf_seg_size;
 810
 811                         return -ENOMEM;
 812                 }
 813
 814                 dma_unmap_page(&edev->pdev->dev, curr_cons->mapping,
 815                                PAGE_SIZE, DMA_FROM_DEVICE);
 816         } else {
 817                 /* Increment refcount of the page as we don't want
 818                  * network stack to take the ownership of the page
 819                  * which can be recycled multiple times by the driver.
 820                  */
 821                 atomic_inc(&curr_cons->data->_count);
 822                 qede_reuse_page(edev, rxq, curr_cons);
 823         }
 824
 825         return 0;
 826 }
 827
 828 static inline void qede_update_rx_prod(struct qede_dev *edev,
 829                                        struct qede_rx_queue *rxq)
 830 {
 831         u16 bd_prod = qed_chain_get_prod_idx(&rxq->rx_bd_ring);
 832         u16 cqe_prod = qed_chain_get_prod_idx(&rxq->rx_comp_ring);
 833         struct eth_rx_prod_data rx_prods = {0};
 834
 835         /* Update producers */
 836         rx_prods.bd_prod = cpu_to_le16(bd_prod);
 837         rx_prods.cqe_prod = cpu_to_le16(cqe_prod);
 838
 839         /* Make sure that the BD and SGE data is updated before updating the
 840          * producers since FW might read the BD/SGE right after the producer
 841          * is updated.
 842          */
 843         wmb();
 844
 845         internal_ram_wr(rxq->hw_rxq_prod_addr, sizeof(rx_prods),
 846                         (u32 *)&rx_prods);
 847
 848         /* mmiowb is needed to synchronize doorbell writes from more than one
 849          * processor. It guarantees that the write arrives to the device before
 850          * the napi lock is released and another qede_poll is called (possibly
 851          * on another CPU). Without this barrier, the next doorbell can bypass
 852          * this doorbell. This is applicable to IA64/Altix systems.
 853          */
 854         mmiowb();
 855 }
 856
 857 static u32 qede_get_rxhash(struct qede_dev *edev,
 858                            u8 bitfields,
 859                            __le32 rss_hash,
 860                            enum pkt_hash_types *rxhash_type)
 861 {
 862         enum rss_hash_type htype;
 863
 864         htype = GET_FIELD(bitfields, ETH_FAST_PATH_RX_REG_CQE_RSS_HASH_TYPE);
 865
 866         if ((edev->ndev->features & NETIF_F_RXHASH) && htype) {
 867                 *rxhash_type = ((htype == RSS_HASH_TYPE_IPV4) ||
 868                                 (htype == RSS_HASH_TYPE_IPV6)) ?
 869                                 PKT_HASH_TYPE_L3 : PKT_HASH_TYPE_L4;
 870                 return le32_to_cpu(rss_hash);
 871         }
 872         *rxhash_type = PKT_HASH_TYPE_NONE;
 873         return 0;
 874 }
 875
 876 static void qede_set_skb_csum(struct sk_buff *skb, u8 csum_flag)
 877 {
 878         skb_checksum_none_assert(skb);
 879
 880         if (csum_flag & QEDE_CSUM_UNNECESSARY)
 881                 skb->ip_summed = CHECKSUM_UNNECESSARY;
 882 }
 883
 884 static inline void qede_skb_receive(struct qede_dev *edev,
 885                                     struct qede_fastpath *fp,
 886                                     struct sk_buff *skb,
 887                                     u16 vlan_tag)
 888 {
 889         if (vlan_tag)
 890                 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
 891                                        vlan_tag);
 892
 893         napi_gro_receive(&fp->napi, skb);
 894 }
 895
 896 static void qede_set_gro_params(struct qede_dev *edev,
 897                                 struct sk_buff *skb,
 898                                 struct eth_fast_path_rx_tpa_start_cqe *cqe)
 899 {
 900         u16 parsing_flags = le16_to_cpu(cqe->pars_flags.flags);
 901
 902         if (((parsing_flags >> PARSING_AND_ERR_FLAGS_L3TYPE_SHIFT) &
 903             PARSING_AND_ERR_FLAGS_L3TYPE_MASK) == 2)
 904                 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6;
 905         else
 906                 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4;
 907
 908         skb_shinfo(skb)->gso_size = __le16_to_cpu(cqe->len_on_first_bd) -
 909                                         cqe->header_len;
 910 }
 911
 912 static int qede_fill_frag_skb(struct qede_dev *edev,
 913                               struct qede_rx_queue *rxq,
 914                               u8 tpa_agg_index,
 915                               u16 len_on_bd)
 916 {
 917         struct sw_rx_data *current_bd = &rxq->sw_rx_ring[rxq->sw_rx_cons &
 918                                                          NUM_RX_BDS_MAX];
 919         struct qede_agg_info *tpa_info = &rxq->tpa_info[tpa_agg_index];
 920         struct sk_buff *skb = tpa_info->skb;
 921
 922         if (unlikely(tpa_info->agg_state != QEDE_AGG_STATE_START))
 923                 goto out;
 924
 925         /* Add one frag and update the appropriate fields in the skb */
 926         skb_fill_page_desc(skb, tpa_info->frag_id++,
 927                            current_bd->data, current_bd->page_offset,
 928                            len_on_bd);
 929
 930         if (unlikely(qede_realloc_rx_buffer(edev, rxq, current_bd))) {
 931                 /* Incr page ref count to reuse on allocation failure
 932                  * so that it doesn't get freed while freeing SKB.
 933                  */
 934                 atomic_inc(&current_bd->data->_count);
 935                 goto out;
 936         }
 937
 938         qed_chain_consume(&rxq->rx_bd_ring);
 939         rxq->sw_rx_cons++;
 940
 941         skb->data_len += len_on_bd;
 942         skb->truesize += rxq->rx_buf_seg_size;
 943         skb->len += len_on_bd;
 944
 945         return 0;
 946
 947 out:
 948         tpa_info->agg_state = QEDE_AGG_STATE_ERROR;
 949         qede_recycle_rx_bd_ring(rxq, edev, 1);
 950         return -ENOMEM;
 951 }
 952
 953 static void qede_tpa_start(struct qede_dev *edev,
 954                            struct qede_rx_queue *rxq,
 955                            struct eth_fast_path_rx_tpa_start_cqe *cqe)
 956 {
 957         struct qede_agg_info *tpa_info = &rxq->tpa_info[cqe->tpa_agg_index];
 958         struct eth_rx_bd *rx_bd_cons = qed_chain_consume(&rxq->rx_bd_ring);
 959         struct eth_rx_bd *rx_bd_prod = qed_chain_produce(&rxq->rx_bd_ring);
 960         struct sw_rx_data *replace_buf = &tpa_info->replace_buf;
 961         dma_addr_t mapping = tpa_info->replace_buf_mapping;
 962         struct sw_rx_data *sw_rx_data_cons;
 963         struct sw_rx_data *sw_rx_data_prod;
 964         enum pkt_hash_types rxhash_type;
 965         u32 rxhash;
 966
 967         sw_rx_data_cons = &rxq->sw_rx_ring[rxq->sw_rx_cons & NUM_RX_BDS_MAX];
 968         sw_rx_data_prod = &rxq->sw_rx_ring[rxq->sw_rx_prod & NUM_RX_BDS_MAX];
 969
 970         /* Use pre-allocated replacement buffer - we can't release the agg.
 971          * start until its over and we don't want to risk allocation failing
 972          * here, so re-allocate when aggregation will be over.
 973          */
 974         dma_unmap_addr_set(sw_rx_data_prod, mapping,
 975                            dma_unmap_addr(replace_buf, mapping));
 976
 977         sw_rx_data_prod->data = replace_buf->data;
 978         rx_bd_prod->addr.hi = cpu_to_le32(upper_32_bits(mapping));
 979         rx_bd_prod->addr.lo = cpu_to_le32(lower_32_bits(mapping));
 980         sw_rx_data_prod->page_offset = replace_buf->page_offset;
 981
 982         rxq->sw_rx_prod++;
 983
 984         /* move partial skb from cons to pool (don't unmap yet)
 985          * save mapping, incase we drop the packet later on.
 986          */
 987         tpa_info->start_buf = *sw_rx_data_cons;
 988         mapping = HILO_U64(le32_to_cpu(rx_bd_cons->addr.hi),
 989                            le32_to_cpu(rx_bd_cons->addr.lo));
 990
 991         tpa_info->start_buf_mapping = mapping;
 992         rxq->sw_rx_cons++;
 993
 994         /* set tpa state to start only if we are able to allocate skb
 995          * for this aggregation, otherwise mark as error and aggregation will
 996          * be dropped
 997          */
 998         tpa_info->skb = netdev_alloc_skb(edev->ndev,
 999                                          le16_to_cpu(cqe->len_on_first_bd));
1000         if (unlikely(!tpa_info->skb)) {
1001                 DP_NOTICE(edev, "Failed to allocate SKB for gro\n");
1002                 tpa_info->agg_state = QEDE_AGG_STATE_ERROR;
1003                 goto cons_buf;
1004         }
1005
1006         skb_put(tpa_info->skb, le16_to_cpu(cqe->len_on_first_bd));
1007         memcpy(&tpa_info->start_cqe, cqe, sizeof(tpa_info->start_cqe));
1008
1009         /* Start filling in the aggregation info */
1010         tpa_info->frag_id = 0;
1011         tpa_info->agg_state = QEDE_AGG_STATE_START;
1012
1013         rxhash = qede_get_rxhash(edev, cqe->bitfields,
1014                                  cqe->rss_hash, &rxhash_type);
1015         skb_set_hash(tpa_info->skb, rxhash, rxhash_type);
1016         if ((le16_to_cpu(cqe->pars_flags.flags) >>
1017              PARSING_AND_ERR_FLAGS_TAG8021QEXIST_SHIFT) &
1018                     PARSING_AND_ERR_FLAGS_TAG8021QEXIST_MASK)
1019                 tpa_info->vlan_tag = le16_to_cpu(cqe->vlan_tag);
1020         else
1021                 tpa_info->vlan_tag = 0;
1022
1023         /* This is needed in order to enable forwarding support */
1024         qede_set_gro_params(edev, tpa_info->skb, cqe);
1025
1026 cons_buf: /* We still need to handle bd_len_list to consume buffers */
1027         if (likely(cqe->ext_bd_len_list[0]))
1028                 qede_fill_frag_skb(edev, rxq, cqe->tpa_agg_index,
1029                                    le16_to_cpu(cqe->ext_bd_len_list[0]));
1030
1031         if (unlikely(cqe->ext_bd_len_list[1])) {
1032                 DP_ERR(edev,
1033                        "Unlikely - got a TPA aggregation with more than one ext_bd_len_list entry in the TPA start\n");
1034                 tpa_info->agg_state = QEDE_AGG_STATE_ERROR;
1035         }
1036 }
1037
1038 #ifdef CONFIG_INET
1039 static void qede_gro_ip_csum(struct sk_buff *skb)
1040 {
1041         const struct iphdr *iph = ip_hdr(skb);
1042         struct tcphdr *th;
1043
1044         skb_set_transport_header(skb, sizeof(struct iphdr));
1045         th = tcp_hdr(skb);
1046
1047         th->check = ~tcp_v4_check(skb->len - skb_transport_offset(skb),
1048                                   iph->saddr, iph->daddr, 0);
1049
1050         tcp_gro_complete(skb);
1051 }
1052
1053 static void qede_gro_ipv6_csum(struct sk_buff *skb)
1054 {
1055         struct ipv6hdr *iph = ipv6_hdr(skb);
1056         struct tcphdr *th;
1057
1058         skb_set_transport_header(skb, sizeof(struct ipv6hdr));
1059         th = tcp_hdr(skb);
1060
1061         th->check = ~tcp_v6_check(skb->len - skb_transport_offset(skb),
1062                                   &iph->saddr, &iph->daddr, 0);
1063         tcp_gro_complete(skb);
1064 }
1065 #endif
1066
1067 static void qede_gro_receive(struct qede_dev *edev,
1068                              struct qede_fastpath *fp,
1069                              struct sk_buff *skb,
1070                              u16 vlan_tag)
1071 {
1072         /* FW can send a single MTU sized packet from gro flow
1073          * due to aggregation timeout/last segment etc. which
1074          * is not expected to be a gro packet. If a skb has zero
1075          * frags then simply push it in the stack as non gso skb.
1076          */
1077         if (unlikely(!skb->data_len)) {
1078                 skb_shinfo(skb)->gso_type = 0;
1079                 skb_shinfo(skb)->gso_size = 0;
1080                 goto send_skb;
1081         }
1082
1083 #ifdef CONFIG_INET
1084         if (skb_shinfo(skb)->gso_size) {
1085                 skb_set_network_header(skb, 0);
1086
1087                 switch (skb->protocol) {
1088                 case htons(ETH_P_IP):
1089                         qede_gro_ip_csum(skb);
1090                         break;
1091                 case htons(ETH_P_IPV6):
1092                         qede_gro_ipv6_csum(skb);
1093                         break;
1094                 default:
1095                         DP_ERR(edev,
1096                                "Error: FW GRO supports only IPv4/IPv6, not 0x%04x\n",
1097                                ntohs(skb->protocol));
1098                 }
1099         }
1100 #endif
1101
1102 send_skb:
1103         skb_record_rx_queue(skb, fp->rss_id);
1104         qede_skb_receive(edev, fp, skb, vlan_tag);
1105 }
1106
1107 static inline void qede_tpa_cont(struct qede_dev *edev,
1108                                  struct qede_rx_queue *rxq,
1109                                  struct eth_fast_path_rx_tpa_cont_cqe *cqe)
1110 {
1111         int i;
1112
1113         for (i = 0; cqe->len_list[i]; i++)
1114                 qede_fill_frag_skb(edev, rxq, cqe->tpa_agg_index,
1115                                    le16_to_cpu(cqe->len_list[i]));
1116
1117         if (unlikely(i > 1))
1118                 DP_ERR(edev,
1119                        "Strange - TPA cont with more than a single len_list entry\n");
1120 }
1121
1122 static void qede_tpa_end(struct qede_dev *edev,
1123                          struct qede_fastpath *fp,
1124                          struct eth_fast_path_rx_tpa_end_cqe *cqe)
1125 {
1126         struct qede_rx_queue *rxq = fp->rxq;
1127         struct qede_agg_info *tpa_info;
1128         struct sk_buff *skb;
1129         int i;
1130
1131         tpa_info = &rxq->tpa_info[cqe->tpa_agg_index];
1132         skb = tpa_info->skb;
1133
1134         for (i = 0; cqe->len_list[i]; i++)
1135                 qede_fill_frag_skb(edev, rxq, cqe->tpa_agg_index,
1136                                    le16_to_cpu(cqe->len_list[i]));
1137         if (unlikely(i > 1))
1138                 DP_ERR(edev,
1139                        "Strange - TPA emd with more than a single len_list entry\n");
1140
1141         if (unlikely(tpa_info->agg_state != QEDE_AGG_STATE_START))
1142                 goto err;
1143
1144         /* Sanity */
1145         if (unlikely(cqe->num_of_bds != tpa_info->frag_id + 1))
1146                 DP_ERR(edev,
1147                        "Strange - TPA had %02x BDs, but SKB has only %d frags\n",
1148                        cqe->num_of_bds, tpa_info->frag_id);
1149         if (unlikely(skb->len != le16_to_cpu(cqe->total_packet_len)))
1150                 DP_ERR(edev,
1151                        "Strange - total packet len [cqe] is %4x but SKB has len %04x\n",
1152                        le16_to_cpu(cqe->total_packet_len), skb->len);
1153
1154         memcpy(skb->data,
1155                page_address(tpa_info->start_buf.data) +
1156                 tpa_info->start_cqe.placement_offset +
1157                 tpa_info->start_buf.page_offset,
1158                le16_to_cpu(tpa_info->start_cqe.len_on_first_bd));
1159
1160         /* Recycle [mapped] start buffer for the next replacement */
1161         tpa_info->replace_buf = tpa_info->start_buf;
1162         tpa_info->replace_buf_mapping = tpa_info->start_buf_mapping;
1163
1164         /* Finalize the SKB */
1165         skb->protocol = eth_type_trans(skb, edev->ndev);
1166         skb->ip_summed = CHECKSUM_UNNECESSARY;
1167
1168         /* tcp_gro_complete() will copy NAPI_GRO_CB(skb)->count
1169          * to skb_shinfo(skb)->gso_segs
1170          */
1171         NAPI_GRO_CB(skb)->count = le16_to_cpu(cqe->num_of_coalesced_segs);
1172
1173         qede_gro_receive(edev, fp, skb, tpa_info->vlan_tag);
1174
1175         tpa_info->agg_state = QEDE_AGG_STATE_NONE;
1176
1177         return;
1178 err:
1179         /* The BD starting the aggregation is still mapped; Re-use it for
1180          * future aggregations [as replacement buffer]
1181          */
1182         memcpy(&tpa_info->replace_buf, &tpa_info->start_buf,
1183                sizeof(struct sw_rx_data));
1184         tpa_info->replace_buf_mapping = tpa_info->start_buf_mapping;
1185         tpa_info->start_buf.data = NULL;
1186         tpa_info->agg_state = QEDE_AGG_STATE_NONE;
1187         dev_kfree_skb_any(tpa_info->skb);
1188         tpa_info->skb = NULL;
1189 }
1190
1191 static u8 qede_check_csum(u16 flag)
1192 {
1193         u16 csum_flag = 0;
1194         u8 csum = 0;
1195
1196         if ((PARSING_AND_ERR_FLAGS_L4CHKSMWASCALCULATED_MASK <<
1197              PARSING_AND_ERR_FLAGS_L4CHKSMWASCALCULATED_SHIFT) & flag) {
1198                 csum_flag |= PARSING_AND_ERR_FLAGS_L4CHKSMERROR_MASK <<
1199                              PARSING_AND_ERR_FLAGS_L4CHKSMERROR_SHIFT;
1200                 csum = QEDE_CSUM_UNNECESSARY;
1201         }
1202
1203         csum_flag |= PARSING_AND_ERR_FLAGS_IPHDRERROR_MASK <<
1204                      PARSING_AND_ERR_FLAGS_IPHDRERROR_SHIFT;
1205
1206         if (csum_flag & flag)
1207                 return QEDE_CSUM_ERROR;
1208
1209         return csum;
1210 }
1211
1212 static int qede_rx_int(struct qede_fastpath *fp, int budget)
1213 {
1214         struct qede_dev *edev = fp->edev;
1215         struct qede_rx_queue *rxq = fp->rxq;
1216
1217         u16 hw_comp_cons, sw_comp_cons, sw_rx_index, parse_flag;
1218         int rx_pkt = 0;
1219         u8 csum_flag;
1220
1221         hw_comp_cons = le16_to_cpu(*rxq->hw_cons_ptr);
1222         sw_comp_cons = qed_chain_get_cons_idx(&rxq->rx_comp_ring);
1223
1224         /* Memory barrier to prevent the CPU from doing speculative reads of CQE
1225          * / BD in the while-loop before reading hw_comp_cons. If the CQE is
1226          * read before it is written by FW, then FW writes CQE and SB, and then
1227          * the CPU reads the hw_comp_cons, it will use an old CQE.
1228          */
1229         rmb();
1230
1231         /* Loop to complete all indicated BDs */
1232         while (sw_comp_cons != hw_comp_cons) {
1233                 struct eth_fast_path_rx_reg_cqe *fp_cqe;
1234                 enum pkt_hash_types rxhash_type;
1235                 enum eth_rx_cqe_type cqe_type;
1236                 struct sw_rx_data *sw_rx_data;
1237                 union eth_rx_cqe *cqe;
1238                 struct sk_buff *skb;
1239                 struct page *data;
1240                 __le16 flags;
1241                 u16 len, pad;
1242                 u32 rx_hash;
1243
1244                 /* Get the CQE from the completion ring */
1245                 cqe = (union eth_rx_cqe *)
1246                         qed_chain_consume(&rxq->rx_comp_ring);
1247                 cqe_type = cqe->fast_path_regular.type;
1248
1249                 if (unlikely(cqe_type == ETH_RX_CQE_TYPE_SLOW_PATH)) {
1250                         edev->ops->eth_cqe_completion(
1251                                         edev->cdev, fp->rss_id,
1252                                         (struct eth_slow_path_rx_cqe *)cqe);
1253                         goto next_cqe;
1254                 }
1255
1256                 if (cqe_type != ETH_RX_CQE_TYPE_REGULAR) {
1257                         switch (cqe_type) {
1258                         case ETH_RX_CQE_TYPE_TPA_START:
1259                                 qede_tpa_start(edev, rxq,
1260                                                &cqe->fast_path_tpa_start);
1261                                 goto next_cqe;
1262                         case ETH_RX_CQE_TYPE_TPA_CONT:
1263                                 qede_tpa_cont(edev, rxq,
1264                                               &cqe->fast_path_tpa_cont);
1265                                 goto next_cqe;
1266                         case ETH_RX_CQE_TYPE_TPA_END:
1267                                 qede_tpa_end(edev, fp,
1268                                              &cqe->fast_path_tpa_end);
1269                                 goto next_rx_only;
1270                         default:
1271                                 break;
1272                         }
1273                 }
1274
1275                 /* Get the data from the SW ring */
1276                 sw_rx_index = rxq->sw_rx_cons & NUM_RX_BDS_MAX;
1277                 sw_rx_data = &rxq->sw_rx_ring[sw_rx_index];
1278                 data = sw_rx_data->data;
1279
1280                 fp_cqe = &cqe->fast_path_regular;
1281                 len =  le16_to_cpu(fp_cqe->len_on_first_bd);
1282                 pad = fp_cqe->placement_offset;
1283                 flags = cqe->fast_path_regular.pars_flags.flags;
1284
1285                 /* If this is an error packet then drop it */
1286                 parse_flag = le16_to_cpu(flags);
1287
1288                 csum_flag = qede_check_csum(parse_flag);
1289                 if (unlikely(csum_flag == QEDE_CSUM_ERROR)) {
1290                         DP_NOTICE(edev,
1291                                   "CQE in CONS = %u has error, flags = %x, dropping incoming packet\n",
1292                                   sw_comp_cons, parse_flag);
1293                         rxq->rx_hw_errors++;
1294                         qede_recycle_rx_bd_ring(rxq, edev, fp_cqe->bd_num);
1295                         goto next_cqe;
1296                 }
1297
1298                 skb = netdev_alloc_skb(edev->ndev, QEDE_RX_HDR_SIZE);
1299                 if (unlikely(!skb)) {
1300                         DP_NOTICE(edev,
1301                                   "Build_skb failed, dropping incoming packet\n");
1302                         qede_recycle_rx_bd_ring(rxq, edev, fp_cqe->bd_num);
1303                         rxq->rx_alloc_errors++;
1304                         goto next_cqe;
1305                 }
1306
1307                 /* Copy data into SKB */
1308                 if (len + pad <= QEDE_RX_HDR_SIZE) {
1309                         memcpy(skb_put(skb, len),
1310                                page_address(data) + pad +
1311                                 sw_rx_data->page_offset, len);
1312                         qede_reuse_page(edev, rxq, sw_rx_data);
1313                 } else {
1314                         struct skb_frag_struct *frag;
1315                         unsigned int pull_len;
1316                         unsigned char *va;
1317
1318                         frag = &skb_shinfo(skb)->frags[0];
1319
1320                         skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags, data,
1321                                         pad + sw_rx_data->page_offset,
1322                                         len, rxq->rx_buf_seg_size);
1323
1324                         va = skb_frag_address(frag);
1325                         pull_len = eth_get_headlen(va, QEDE_RX_HDR_SIZE);
1326
1327                         /* Align the pull_len to optimize memcpy */
1328                         memcpy(skb->data, va, ALIGN(pull_len, sizeof(long)));
1329
1330                         skb_frag_size_sub(frag, pull_len);
1331                         frag->page_offset += pull_len;
1332                         skb->data_len -= pull_len;
1333                         skb->tail += pull_len;
1334
1335                         if (unlikely(qede_realloc_rx_buffer(edev, rxq,
1336                                                             sw_rx_data))) {
1337                                 DP_ERR(edev, "Failed to allocate rx buffer\n");
1338                                 /* Incr page ref count to reuse on allocation
1339                                  * failure so that it doesn't get freed while
1340                                  * freeing SKB.
1341                                  */
1342
1343                                 atomic_inc(&sw_rx_data->data->_count);
1344                                 rxq->rx_alloc_errors++;
1345                                 qede_recycle_rx_bd_ring(rxq, edev,
1346                                                         fp_cqe->bd_num);
1347                                 dev_kfree_skb_any(skb);
1348                                 goto next_cqe;
1349                         }
1350                 }
1351
1352                 qede_rx_bd_ring_consume(rxq);
1353
1354                 if (fp_cqe->bd_num != 1) {
1355                         u16 pkt_len = le16_to_cpu(fp_cqe->pkt_len);
1356                         u8 num_frags;
1357
1358                         pkt_len -= len;
1359
1360                         for (num_frags = fp_cqe->bd_num - 1; num_frags > 0;
1361                              num_frags--) {
1362                                 u16 cur_size = pkt_len > rxq->rx_buf_size ?
1363                                                 rxq->rx_buf_size : pkt_len;
1364                                 if (unlikely(!cur_size)) {
1365                                         DP_ERR(edev,
1366                                                "Still got %d BDs for mapping jumbo, but length became 0\n",
1367                                                num_frags);
1368                                         qede_recycle_rx_bd_ring(rxq, edev,
1369                                                                 num_frags);
1370                                         dev_kfree_skb_any(skb);
1371                                         goto next_cqe;
1372                                 }
1373
1374                                 if (unlikely(qede_alloc_rx_buffer(edev, rxq))) {
1375                                         qede_recycle_rx_bd_ring(rxq, edev,
1376                                                                 num_frags);
1377                                         dev_kfree_skb_any(skb);
1378                                         goto next_cqe;
1379                                 }
1380
1381                                 sw_rx_index = rxq->sw_rx_cons & NUM_RX_BDS_MAX;
1382                                 sw_rx_data = &rxq->sw_rx_ring[sw_rx_index];
1383                                 qede_rx_bd_ring_consume(rxq);
1384
1385                                 dma_unmap_page(&edev->pdev->dev,
1386                                                sw_rx_data->mapping,
1387                                                PAGE_SIZE, DMA_FROM_DEVICE);
1388
1389                                 skb_fill_page_desc(skb,
1390                                                    skb_shinfo(skb)->nr_frags++,
1391                                                    sw_rx_data->data, 0,
1392                                                    cur_size);
1393
1394                                 skb->truesize += PAGE_SIZE;
1395                                 skb->data_len += cur_size;
1396                                 skb->len += cur_size;
1397                                 pkt_len -= cur_size;
1398                         }
1399
1400                         if (unlikely(pkt_len))
1401                                 DP_ERR(edev,
1402                                        "Mapped all BDs of jumbo, but still have %d bytes\n",
1403                                        pkt_len);
1404                 }
1405
1406                 skb->protocol = eth_type_trans(skb, edev->ndev);
1407
1408                 rx_hash = qede_get_rxhash(edev, fp_cqe->bitfields,
1409                                           fp_cqe->rss_hash,
1410                                           &rxhash_type);
1411
1412                 skb_set_hash(skb, rx_hash, rxhash_type);
1413
1414                 qede_set_skb_csum(skb, csum_flag);
1415
1416                 skb_record_rx_queue(skb, fp->rss_id);
1417
1418                 qede_skb_receive(edev, fp, skb, le16_to_cpu(fp_cqe->vlan_tag));
1419 next_rx_only:
1420                 rx_pkt++;
1421
1422 next_cqe: /* don't consume bd rx buffer */
1423                 qed_chain_recycle_consumed(&rxq->rx_comp_ring);
1424                 sw_comp_cons = qed_chain_get_cons_idx(&rxq->rx_comp_ring);
1425                 /* CR TPA - revisit how to handle budget in TPA perhaps
1426                  * increase on "end"
1427                  */
1428                 if (rx_pkt == budget)
1429                         break;
1430         } /* repeat while sw_comp_cons != hw_comp_cons... */
1431
1432         /* Update producers */
1433         qede_update_rx_prod(edev, rxq);
1434
1435         return rx_pkt;
1436 }
1437
1438 static int qede_poll(struct napi_struct *napi, int budget)
1439 {
1440         int work_done = 0;
1441         struct qede_fastpath *fp = container_of(napi, struct qede_fastpath,
1442                                                  napi);
1443         struct qede_dev *edev = fp->edev;
1444
1445         while (1) {
1446                 u8 tc;
1447
1448                 for (tc = 0; tc < edev->num_tc; tc++)
1449                         if (qede_txq_has_work(&fp->txqs[tc]))
1450                                 qede_tx_int(edev, &fp->txqs[tc]);
1451
1452                 if (qede_has_rx_work(fp->rxq)) {
1453                         work_done += qede_rx_int(fp, budget - work_done);
1454
1455                         /* must not complete if we consumed full budget */
1456                         if (work_done >= budget)
1457                                 break;
1458                 }
1459
1460                 /* Fall out from the NAPI loop if needed */
1461                 if (!(qede_has_rx_work(fp->rxq) || qede_has_tx_work(fp))) {
1462                         qed_sb_update_sb_idx(fp->sb_info);
1463                         /* *_has_*_work() reads the status block,
1464                          * thus we need to ensure that status block indices
1465                          * have been actually read (qed_sb_update_sb_idx)
1466                          * prior to this check (*_has_*_work) so that
1467                          * we won't write the "newer" value of the status block
1468                          * to HW (if there was a DMA right after
1469                          * qede_has_rx_work and if there is no rmb, the memory
1470                          * reading (qed_sb_update_sb_idx) may be postponed
1471                          * to right before *_ack_sb). In this case there
1472                          * will never be another interrupt until there is
1473                          * another update of the status block, while there
1474                          * is still unhandled work.
1475                          */
1476                         rmb();
1477
1478                         if (!(qede_has_rx_work(fp->rxq) ||
1479                               qede_has_tx_work(fp))) {
1480                                 napi_complete(napi);
1481                                 /* Update and reenable interrupts */
1482                                 qed_sb_ack(fp->sb_info, IGU_INT_ENABLE,
1483                                            1 /*update*/);
1484                                 break;
1485                         }
1486                 }
1487         }
1488
1489         return work_done;
1490 }
1491
1492 static irqreturn_t qede_msix_fp_int(int irq, void *fp_cookie)
1493 {
1494         struct qede_fastpath *fp = fp_cookie;
1495
1496         qed_sb_ack(fp->sb_info, IGU_INT_DISABLE, 0 /*do not update*/);
1497
1498         napi_schedule_irqoff(&fp->napi);
1499         return IRQ_HANDLED;
1500 }
1501
1502 /* -------------------------------------------------------------------------
1503  * END OF FAST-PATH
1504  * -------------------------------------------------------------------------
1505  */
1506
1507 static int qede_open(struct net_device *ndev);
1508 static int qede_close(struct net_device *ndev);
1509 static int qede_set_mac_addr(struct net_device *ndev, void *p);
1510 static void qede_set_rx_mode(struct net_device *ndev);
1511 static void qede_config_rx_mode(struct net_device *ndev);
1512
1513 static int qede_set_ucast_rx_mac(struct qede_dev *edev,
1514                                  enum qed_filter_xcast_params_type opcode,
1515                                  unsigned char mac[ETH_ALEN])
1516 {
1517         struct qed_filter_params filter_cmd;
1518
1519         memset(&filter_cmd, 0, sizeof(filter_cmd));
1520         filter_cmd.type = QED_FILTER_TYPE_UCAST;
1521         filter_cmd.filter.ucast.type = opcode;
1522         filter_cmd.filter.ucast.mac_valid = 1;
1523         ether_addr_copy(filter_cmd.filter.ucast.mac, mac);
1524
1525         return edev->ops->filter_config(edev->cdev, &filter_cmd);
1526 }
1527
1528 static int qede_set_ucast_rx_vlan(struct qede_dev *edev,
1529                                   enum qed_filter_xcast_params_type opcode,
1530                                   u16 vid)
1531 {
1532         struct qed_filter_params filter_cmd;
1533
1534         memset(&filter_cmd, 0, sizeof(filter_cmd));
1535         filter_cmd.type = QED_FILTER_TYPE_UCAST;
1536         filter_cmd.filter.ucast.type = opcode;
1537         filter_cmd.filter.ucast.vlan_valid = 1;
1538         filter_cmd.filter.ucast.vlan = vid;
1539
1540         return edev->ops->filter_config(edev->cdev, &filter_cmd);
1541 }
1542
1543 void qede_fill_by_demand_stats(struct qede_dev *edev)
1544 {
1545         struct qed_eth_stats stats;
1546
1547         edev->ops->get_vport_stats(edev->cdev, &stats);
1548         edev->stats.no_buff_discards = stats.no_buff_discards;
1549         edev->stats.rx_ucast_bytes = stats.rx_ucast_bytes;
1550         edev->stats.rx_mcast_bytes = stats.rx_mcast_bytes;
1551         edev->stats.rx_bcast_bytes = stats.rx_bcast_bytes;
1552         edev->stats.rx_ucast_pkts = stats.rx_ucast_pkts;
1553         edev->stats.rx_mcast_pkts = stats.rx_mcast_pkts;
1554         edev->stats.rx_bcast_pkts = stats.rx_bcast_pkts;
1555         edev->stats.mftag_filter_discards = stats.mftag_filter_discards;
1556         edev->stats.mac_filter_discards = stats.mac_filter_discards;
1557
1558         edev->stats.tx_ucast_bytes = stats.tx_ucast_bytes;
1559         edev->stats.tx_mcast_bytes = stats.tx_mcast_bytes;
1560         edev->stats.tx_bcast_bytes = stats.tx_bcast_bytes;
1561         edev->stats.tx_ucast_pkts = stats.tx_ucast_pkts;
1562         edev->stats.tx_mcast_pkts = stats.tx_mcast_pkts;
1563         edev->stats.tx_bcast_pkts = stats.tx_bcast_pkts;
1564         edev->stats.tx_err_drop_pkts = stats.tx_err_drop_pkts;
1565         edev->stats.coalesced_pkts = stats.tpa_coalesced_pkts;
1566         edev->stats.coalesced_events = stats.tpa_coalesced_events;
1567         edev->stats.coalesced_aborts_num = stats.tpa_aborts_num;
1568         edev->stats.non_coalesced_pkts = stats.tpa_not_coalesced_pkts;
1569         edev->stats.coalesced_bytes = stats.tpa_coalesced_bytes;
1570
1571         edev->stats.rx_64_byte_packets = stats.rx_64_byte_packets;
1572         edev->stats.rx_127_byte_packets = stats.rx_127_byte_packets;
1573         edev->stats.rx_255_byte_packets = stats.rx_255_byte_packets;
1574         edev->stats.rx_511_byte_packets = stats.rx_511_byte_packets;
1575         edev->stats.rx_1023_byte_packets = stats.rx_1023_byte_packets;
1576         edev->stats.rx_1518_byte_packets = stats.rx_1518_byte_packets;
1577         edev->stats.rx_1522_byte_packets = stats.rx_1522_byte_packets;
1578         edev->stats.rx_2047_byte_packets = stats.rx_2047_byte_packets;
1579         edev->stats.rx_4095_byte_packets = stats.rx_4095_byte_packets;
1580         edev->stats.rx_9216_byte_packets = stats.rx_9216_byte_packets;
1581         edev->stats.rx_16383_byte_packets = stats.rx_16383_byte_packets;
1582         edev->stats.rx_crc_errors = stats.rx_crc_errors;
1583         edev->stats.rx_mac_crtl_frames = stats.rx_mac_crtl_frames;
1584         edev->stats.rx_pause_frames = stats.rx_pause_frames;
1585         edev->stats.rx_pfc_frames = stats.rx_pfc_frames;
1586         edev->stats.rx_align_errors = stats.rx_align_errors;
1587         edev->stats.rx_carrier_errors = stats.rx_carrier_errors;
1588         edev->stats.rx_oversize_packets = stats.rx_oversize_packets;
1589         edev->stats.rx_jabbers = stats.rx_jabbers;
1590         edev->stats.rx_undersize_packets = stats.rx_undersize_packets;
1591         edev->stats.rx_fragments = stats.rx_fragments;
1592         edev->stats.tx_64_byte_packets = stats.tx_64_byte_packets;
1593         edev->stats.tx_65_to_127_byte_packets = stats.tx_65_to_127_byte_packets;
1594         edev->stats.tx_128_to_255_byte_packets =
1595                                 stats.tx_128_to_255_byte_packets;
1596         edev->stats.tx_256_to_511_byte_packets =
1597                                 stats.tx_256_to_511_byte_packets;
1598         edev->stats.tx_512_to_1023_byte_packets =
1599                                 stats.tx_512_to_1023_byte_packets;
1600         edev->stats.tx_1024_to_1518_byte_packets =
1601                                 stats.tx_1024_to_1518_byte_packets;
1602         edev->stats.tx_1519_to_2047_byte_packets =
1603                                 stats.tx_1519_to_2047_byte_packets;
1604         edev->stats.tx_2048_to_4095_byte_packets =
1605                                 stats.tx_2048_to_4095_byte_packets;
1606         edev->stats.tx_4096_to_9216_byte_packets =
1607                                 stats.tx_4096_to_9216_byte_packets;
1608         edev->stats.tx_9217_to_16383_byte_packets =
1609                                 stats.tx_9217_to_16383_byte_packets;
1610         edev->stats.tx_pause_frames = stats.tx_pause_frames;
1611         edev->stats.tx_pfc_frames = stats.tx_pfc_frames;
1612         edev->stats.tx_lpi_entry_count = stats.tx_lpi_entry_count;
1613         edev->stats.tx_total_collisions = stats.tx_total_collisions;
1614         edev->stats.brb_truncates = stats.brb_truncates;
1615         edev->stats.brb_discards = stats.brb_discards;
1616         edev->stats.tx_mac_ctrl_frames = stats.tx_mac_ctrl_frames;
1617 }
1618
1619 static struct rtnl_link_stats64 *qede_get_stats64(
1620                             struct net_device *dev,
1621                             struct rtnl_link_stats64 *stats)
1622 {
1623         struct qede_dev *edev = netdev_priv(dev);
1624
1625         qede_fill_by_demand_stats(edev);
1626
1627         stats->rx_packets = edev->stats.rx_ucast_pkts +
1628                             edev->stats.rx_mcast_pkts +
1629                             edev->stats.rx_bcast_pkts;
1630         stats->tx_packets = edev->stats.tx_ucast_pkts +
1631                             edev->stats.tx_mcast_pkts +
1632                             edev->stats.tx_bcast_pkts;
1633
1634         stats->rx_bytes = edev->stats.rx_ucast_bytes +
1635                           edev->stats.rx_mcast_bytes +
1636                           edev->stats.rx_bcast_bytes;
1637
1638         stats->tx_bytes = edev->stats.tx_ucast_bytes +
1639                           edev->stats.tx_mcast_bytes +
1640                           edev->stats.tx_bcast_bytes;
1641
1642         stats->tx_errors = edev->stats.tx_err_drop_pkts;
1643         stats->multicast = edev->stats.rx_mcast_pkts +
1644                            edev->stats.rx_bcast_pkts;
1645
1646         stats->rx_fifo_errors = edev->stats.no_buff_discards;
1647
1648         stats->collisions = edev->stats.tx_total_collisions;
1649         stats->rx_crc_errors = edev->stats.rx_crc_errors;
1650         stats->rx_frame_errors = edev->stats.rx_align_errors;
1651
1652         return stats;
1653 }
1654
1655 static void qede_config_accept_any_vlan(struct qede_dev *edev, bool action)
1656 {
1657         struct qed_update_vport_params params;
1658         int rc;
1659
1660         /* Proceed only if action actually needs to be performed */
1661         if (edev->accept_any_vlan == action)
1662                 return;
1663
1664         memset(&params, 0, sizeof(params));
1665
1666         params.vport_id = 0;
1667         params.accept_any_vlan = action;
1668         params.update_accept_any_vlan_flg = 1;
1669
1670         rc = edev->ops->vport_update(edev->cdev, &params);
1671         if (rc) {
1672                 DP_ERR(edev, "Failed to %s accept-any-vlan\n",
1673                        action ? "enable" : "disable");
1674         } else {
1675                 DP_INFO(edev, "%s accept-any-vlan\n",
1676                         action ? "enabled" : "disabled");
1677                 edev->accept_any_vlan = action;
1678         }
1679 }
1680
1681 static int qede_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
1682 {
1683         struct qede_dev *edev = netdev_priv(dev);
1684         struct qede_vlan *vlan, *tmp;
1685         int rc;
1686
1687         DP_VERBOSE(edev, NETIF_MSG_IFUP, "Adding vlan 0x%04x\n", vid);
1688
1689         vlan = kzalloc(sizeof(*vlan), GFP_KERNEL);
1690         if (!vlan) {
1691                 DP_INFO(edev, "Failed to allocate struct for vlan\n");
1692                 return -ENOMEM;
1693         }
1694         INIT_LIST_HEAD(&vlan->list);
1695         vlan->vid = vid;
1696         vlan->configured = false;
1697
1698         /* Verify vlan isn't already configured */
1699         list_for_each_entry(tmp, &edev->vlan_list, list) {
1700                 if (tmp->vid == vlan->vid) {
1701                         DP_VERBOSE(edev, (NETIF_MSG_IFUP | NETIF_MSG_IFDOWN),
1702                                    "vlan already configured\n");
1703                         kfree(vlan);
1704                         return -EEXIST;
1705                 }
1706         }
1707
1708         /* If interface is down, cache this VLAN ID and return */
1709         if (edev->state != QEDE_STATE_OPEN) {
1710                 DP_VERBOSE(edev, NETIF_MSG_IFDOWN,
1711                            "Interface is down, VLAN %d will be configured when interface is up\n",
1712                            vid);
1713                 if (vid != 0)
1714                         edev->non_configured_vlans++;
1715                 list_add(&vlan->list, &edev->vlan_list);
1716
1717                 return 0;
1718         }
1719
1720         /* Check for the filter limit.
1721          * Note - vlan0 has a reserved filter and can be added without
1722          * worrying about quota
1723          */
1724         if ((edev->configured_vlans < edev->dev_info.num_vlan_filters) ||
1725             (vlan->vid == 0)) {
1726                 rc = qede_set_ucast_rx_vlan(edev,
1727                                             QED_FILTER_XCAST_TYPE_ADD,
1728                                             vlan->vid);
1729                 if (rc) {
1730                         DP_ERR(edev, "Failed to configure VLAN %d\n",
1731                                vlan->vid);
1732                         kfree(vlan);
1733                         return -EINVAL;
1734                 }
1735                 vlan->configured = true;
1736
1737                 /* vlan0 filter isn't consuming out of our quota */
1738                 if (vlan->vid != 0)
1739                         edev->configured_vlans++;
1740         } else {
1741                 /* Out of quota; Activate accept-any-VLAN mode */
1742                 if (!edev->non_configured_vlans)
1743                         qede_config_accept_any_vlan(edev, true);
1744
1745                 edev->non_configured_vlans++;
1746         }
1747
1748         list_add(&vlan->list, &edev->vlan_list);
1749
1750         return 0;
1751 }
1752
1753 static void qede_del_vlan_from_list(struct qede_dev *edev,
1754                                     struct qede_vlan *vlan)
1755 {
1756         /* vlan0 filter isn't consuming out of our quota */
1757         if (vlan->vid != 0) {
1758                 if (vlan->configured)
1759                         edev->configured_vlans--;
1760                 else
1761                         edev->non_configured_vlans--;
1762         }
1763
1764         list_del(&vlan->list);
1765         kfree(vlan);
1766 }
1767
1768 static int qede_configure_vlan_filters(struct qede_dev *edev)
1769 {
1770         int rc = 0, real_rc = 0, accept_any_vlan = 0;
1771         struct qed_dev_eth_info *dev_info;
1772         struct qede_vlan *vlan = NULL;
1773
1774         if (list_empty(&edev->vlan_list))
1775                 return 0;
1776
1777         dev_info = &edev->dev_info;
1778
1779         /* Configure non-configured vlans */
1780         list_for_each_entry(vlan, &edev->vlan_list, list) {
1781                 if (vlan->configured)
1782                         continue;
1783
1784                 /* We have used all our credits, now enable accept_any_vlan */
1785                 if ((vlan->vid != 0) &&
1786                     (edev->configured_vlans == dev_info->num_vlan_filters)) {
1787                         accept_any_vlan = 1;
1788                         continue;
1789                 }
1790
1791                 DP_VERBOSE(edev, NETIF_MSG_IFUP, "Adding vlan %d\n", vlan->vid);
1792
1793                 rc = qede_set_ucast_rx_vlan(edev, QED_FILTER_XCAST_TYPE_ADD,
1794                                             vlan->vid);
1795                 if (rc) {
1796                         DP_ERR(edev, "Failed to configure VLAN %u\n",
1797                                vlan->vid);
1798                         real_rc = rc;
1799                         continue;
1800                 }
1801
1802                 vlan->configured = true;
1803                 /* vlan0 filter doesn't consume our VLAN filter's quota */
1804                 if (vlan->vid != 0) {
1805                         edev->non_configured_vlans--;
1806                         edev->configured_vlans++;
1807                 }
1808         }
1809
1810         /* enable accept_any_vlan mode if we have more VLANs than credits,
1811          * or remove accept_any_vlan mode if we've actually removed
1812          * a non-configured vlan, and all remaining vlans are truly configured.
1813          */
1814
1815         if (accept_any_vlan)
1816                 qede_config_accept_any_vlan(edev, true);
1817         else if (!edev->non_configured_vlans)
1818                 qede_config_accept_any_vlan(edev, false);
1819
1820         return real_rc;
1821 }
1822
1823 static int qede_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid)
1824 {
1825         struct qede_dev *edev = netdev_priv(dev);
1826         struct qede_vlan *vlan = NULL;
1827         int rc;
1828
1829         DP_VERBOSE(edev, NETIF_MSG_IFDOWN, "Removing vlan 0x%04x\n", vid);
1830
1831         /* Find whether entry exists */
1832         list_for_each_entry(vlan, &edev->vlan_list, list)
1833                 if (vlan->vid == vid)
1834                         break;
1835
1836         if (!vlan || (vlan->vid != vid)) {
1837                 DP_VERBOSE(edev, (NETIF_MSG_IFUP | NETIF_MSG_IFDOWN),
1838                            "Vlan isn't configured\n");
1839                 return 0;
1840         }
1841
1842         if (edev->state != QEDE_STATE_OPEN) {
1843                 /* As interface is already down, we don't have a VPORT
1844                  * instance to remove vlan filter. So just update vlan list
1845                  */
1846                 DP_VERBOSE(edev, NETIF_MSG_IFDOWN,
1847                            "Interface is down, removing VLAN from list only\n");
1848                 qede_del_vlan_from_list(edev, vlan);
1849                 return 0;
1850         }
1851
1852         /* Remove vlan */
1853         rc = qede_set_ucast_rx_vlan(edev, QED_FILTER_XCAST_TYPE_DEL, vid);
1854         if (rc) {
1855                 DP_ERR(edev, "Failed to remove VLAN %d\n", vid);
1856                 return -EINVAL;
1857         }
1858
1859         qede_del_vlan_from_list(edev, vlan);
1860
1861         /* We have removed a VLAN - try to see if we can
1862          * configure non-configured VLAN from the list.
1863          */
1864         rc = qede_configure_vlan_filters(edev);
1865
1866         return rc;
1867 }
1868
1869 static void qede_vlan_mark_nonconfigured(struct qede_dev *edev)
1870 {
1871         struct qede_vlan *vlan = NULL;
1872
1873         if (list_empty(&edev->vlan_list))
1874                 return;
1875
1876         list_for_each_entry(vlan, &edev->vlan_list, list) {
1877                 if (!vlan->configured)
1878                         continue;
1879
1880                 vlan->configured = false;
1881
1882                 /* vlan0 filter isn't consuming out of our quota */
1883                 if (vlan->vid != 0) {
1884                         edev->non_configured_vlans++;
1885                         edev->configured_vlans--;
1886                 }
1887
1888                 DP_VERBOSE(edev, NETIF_MSG_IFDOWN,
1889                            "marked vlan %d as non-configured\n",
1890                            vlan->vid);
1891         }
1892
1893         edev->accept_any_vlan = false;
1894 }
1895
1896 static const struct net_device_ops qede_netdev_ops = {
1897         .ndo_open = qede_open,
1898         .ndo_stop = qede_close,
1899         .ndo_start_xmit = qede_start_xmit,
1900         .ndo_set_rx_mode = qede_set_rx_mode,
1901         .ndo_set_mac_address = qede_set_mac_addr,
1902         .ndo_validate_addr = eth_validate_addr,
1903         .ndo_change_mtu = qede_change_mtu,
1904         .ndo_vlan_rx_add_vid = qede_vlan_rx_add_vid,
1905         .ndo_vlan_rx_kill_vid = qede_vlan_rx_kill_vid,
1906         .ndo_get_stats64 = qede_get_stats64,
1907 };
1908
1909 /* -------------------------------------------------------------------------
1910  * START OF PROBE / REMOVE
1911  * -------------------------------------------------------------------------
1912  */
1913
1914 static struct qede_dev *qede_alloc_etherdev(struct qed_dev *cdev,
1915                                             struct pci_dev *pdev,
1916                                             struct qed_dev_eth_info *info,
1917                                             u32 dp_module,
1918                                             u8 dp_level)
1919 {
1920         struct net_device *ndev;
1921         struct qede_dev *edev;
1922
1923         ndev = alloc_etherdev_mqs(sizeof(*edev),
1924                                   info->num_queues,
1925                                   info->num_queues);
1926         if (!ndev) {
1927                 pr_err("etherdev allocation failed\n");
1928                 return NULL;
1929         }
1930
1931         edev = netdev_priv(ndev);
1932         edev->ndev = ndev;
1933         edev->cdev = cdev;
1934         edev->pdev = pdev;
1935         edev->dp_module = dp_module;
1936         edev->dp_level = dp_level;
1937         edev->ops = qed_ops;
1938         edev->q_num_rx_buffers = NUM_RX_BDS_DEF;
1939         edev->q_num_tx_buffers = NUM_TX_BDS_DEF;
1940
1941         SET_NETDEV_DEV(ndev, &pdev->dev);
1942
1943         memset(&edev->stats, 0, sizeof(edev->stats));
1944         memcpy(&edev->dev_info, info, sizeof(*info));
1945
1946         edev->num_tc = edev->dev_info.num_tc;
1947
1948         INIT_LIST_HEAD(&edev->vlan_list);
1949
1950         return edev;
1951 }
1952
1953 static void qede_init_ndev(struct qede_dev *edev)
1954 {
1955         struct net_device *ndev = edev->ndev;
1956         struct pci_dev *pdev = edev->pdev;
1957         u32 hw_features;
1958
1959         pci_set_drvdata(pdev, ndev);
1960
1961         ndev->mem_start = edev->dev_info.common.pci_mem_start;
1962         ndev->base_addr = ndev->mem_start;
1963         ndev->mem_end = edev->dev_info.common.pci_mem_end;
1964         ndev->irq = edev->dev_info.common.pci_irq;
1965
1966         ndev->watchdog_timeo = TX_TIMEOUT;
1967
1968         ndev->netdev_ops = &qede_netdev_ops;
1969
1970         qede_set_ethtool_ops(ndev);
1971
1972         /* user-changeble features */
1973         hw_features = NETIF_F_GRO | NETIF_F_SG |
1974                       NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
1975                       NETIF_F_TSO | NETIF_F_TSO6;
1976
1977         ndev->vlan_features = hw_features | NETIF_F_RXHASH | NETIF_F_RXCSUM |
1978                               NETIF_F_HIGHDMA;
1979         ndev->features = hw_features | NETIF_F_RXHASH | NETIF_F_RXCSUM |
1980                          NETIF_F_HW_VLAN_CTAG_RX | NETIF_F_HIGHDMA |
1981                          NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_HW_VLAN_CTAG_TX;
1982
1983         ndev->hw_features = hw_features;
1984
1985         /* Set network device HW mac */
1986         ether_addr_copy(edev->ndev->dev_addr, edev->dev_info.common.hw_mac);
1987 }
1988
1989 /* This function converts from 32b param to two params of level and module
1990  * Input 32b decoding:
1991  * b31 - enable all NOTICE prints. NOTICE prints are for deviation from the
1992  * 'happy' flow, e.g. memory allocation failed.
1993  * b30 - enable all INFO prints. INFO prints are for major steps in the flow
1994  * and provide important parameters.
1995  * b29-b0 - per-module bitmap, where each bit enables VERBOSE prints of that
1996  * module. VERBOSE prints are for tracking the specific flow in low level.
1997  *
1998  * Notice that the level should be that of the lowest required logs.
1999  */
2000 void qede_config_debug(uint debug, u32 *p_dp_module, u8 *p_dp_level)
2001 {
2002         *p_dp_level = QED_LEVEL_NOTICE;
2003         *p_dp_module = 0;
2004
2005         if (debug & QED_LOG_VERBOSE_MASK) {
2006                 *p_dp_level = QED_LEVEL_VERBOSE;
2007                 *p_dp_module = (debug & 0x3FFFFFFF);
2008         } else if (debug & QED_LOG_INFO_MASK) {
2009                 *p_dp_level = QED_LEVEL_INFO;
2010         } else if (debug & QED_LOG_NOTICE_MASK) {
2011                 *p_dp_level = QED_LEVEL_NOTICE;
2012         }
2013 }
2014
2015 static void qede_free_fp_array(struct qede_dev *edev)
2016 {
2017         if (edev->fp_array) {
2018                 struct qede_fastpath *fp;
2019                 int i;
2020
2021                 for_each_rss(i) {
2022                         fp = &edev->fp_array[i];
2023
2024                         kfree(fp->sb_info);
2025                         kfree(fp->rxq);
2026                         kfree(fp->txqs);
2027                 }
2028                 kfree(edev->fp_array);
2029         }
2030         edev->num_rss = 0;
2031 }
2032
2033 static int qede_alloc_fp_array(struct qede_dev *edev)
2034 {
2035         struct qede_fastpath *fp;
2036         int i;
2037
2038         edev->fp_array = kcalloc(QEDE_RSS_CNT(edev),
2039                                  sizeof(*edev->fp_array), GFP_KERNEL);
2040         if (!edev->fp_array) {
2041                 DP_NOTICE(edev, "fp array allocation failed\n");
2042                 goto err;
2043         }
2044
2045         for_each_rss(i) {
2046                 fp = &edev->fp_array[i];
2047
2048                 fp->sb_info = kcalloc(1, sizeof(*fp->sb_info), GFP_KERNEL);
2049                 if (!fp->sb_info) {
2050                         DP_NOTICE(edev, "sb info struct allocation failed\n");
2051                         goto err;
2052                 }
2053
2054                 fp->rxq = kcalloc(1, sizeof(*fp->rxq), GFP_KERNEL);
2055                 if (!fp->rxq) {
2056                         DP_NOTICE(edev, "RXQ struct allocation failed\n");
2057                         goto err;
2058                 }
2059
2060                 fp->txqs = kcalloc(edev->num_tc, sizeof(*fp->txqs), GFP_KERNEL);
2061                 if (!fp->txqs) {
2062                         DP_NOTICE(edev, "TXQ array allocation failed\n");
2063                         goto err;
2064                 }
2065         }
2066
2067         return 0;
2068 err:
2069         qede_free_fp_array(edev);
2070         return -ENOMEM;
2071 }
2072
2073 static void qede_sp_task(struct work_struct *work)
2074 {
2075         struct qede_dev *edev = container_of(work, struct qede_dev,
2076                                              sp_task.work);
2077         mutex_lock(&edev->qede_lock);
2078
2079         if (edev->state == QEDE_STATE_OPEN) {
2080                 if (test_and_clear_bit(QEDE_SP_RX_MODE, &edev->sp_flags))
2081                         qede_config_rx_mode(edev->ndev);
2082         }
2083
2084         mutex_unlock(&edev->qede_lock);
2085 }
2086
2087 static void qede_update_pf_params(struct qed_dev *cdev)
2088 {
2089         struct qed_pf_params pf_params;
2090
2091         /* 64 rx + 64 tx */
2092         memset(&pf_params, 0, sizeof(struct qed_pf_params));
2093         pf_params.eth_pf_params.num_cons = 128;
2094         qed_ops->common->update_pf_params(cdev, &pf_params);
2095 }
2096
2097 enum qede_probe_mode {
2098         QEDE_PROBE_NORMAL,
2099 };
2100
2101 static int __qede_probe(struct pci_dev *pdev, u32 dp_module, u8 dp_level,
2102                         enum qede_probe_mode mode)
2103 {
2104         struct qed_slowpath_params params;
2105         struct qed_dev_eth_info dev_info;
2106         struct qede_dev *edev;
2107         struct qed_dev *cdev;
2108         int rc;
2109
2110         if (unlikely(dp_level & QED_LEVEL_INFO))
2111                 pr_notice("Starting qede probe\n");
2112
2113         cdev = qed_ops->common->probe(pdev, QED_PROTOCOL_ETH,
2114                                       dp_module, dp_level);
2115         if (!cdev) {
2116                 rc = -ENODEV;
2117                 goto err0;
2118         }
2119
2120         qede_update_pf_params(cdev);
2121
2122         /* Start the Slowpath-process */
2123         memset(&params, 0, sizeof(struct qed_slowpath_params));
2124         params.int_mode = QED_INT_MODE_MSIX;
2125         params.drv_major = QEDE_MAJOR_VERSION;
2126         params.drv_minor = QEDE_MINOR_VERSION;
2127         params.drv_rev = QEDE_REVISION_VERSION;
2128         params.drv_eng = QEDE_ENGINEERING_VERSION;
2129         strlcpy(params.name, "qede LAN", QED_DRV_VER_STR_SIZE);
2130         rc = qed_ops->common->slowpath_start(cdev, &params);
2131         if (rc) {
2132                 pr_notice("Cannot start slowpath\n");
2133                 goto err1;
2134         }
2135
2136         /* Learn information crucial for qede to progress */
2137         rc = qed_ops->fill_dev_info(cdev, &dev_info);
2138         if (rc)
2139                 goto err2;
2140
2141         edev = qede_alloc_etherdev(cdev, pdev, &dev_info, dp_module,
2142                                    dp_level);
2143         if (!edev) {
2144                 rc = -ENOMEM;
2145                 goto err2;
2146         }
2147
2148         qede_init_ndev(edev);
2149
2150         rc = register_netdev(edev->ndev);
2151         if (rc) {
2152                 DP_NOTICE(edev, "Cannot register net-device\n");
2153                 goto err3;
2154         }
2155
2156         edev->ops->common->set_id(cdev, edev->ndev->name, DRV_MODULE_VERSION);
2157
2158         edev->ops->register_ops(cdev, &qede_ll_ops, edev);
2159
2160         INIT_DELAYED_WORK(&edev->sp_task, qede_sp_task);
2161         mutex_init(&edev->qede_lock);
2162
2163         DP_INFO(edev, "Ending successfully qede probe\n");
2164
2165         return 0;
2166
2167 err3:
2168         free_netdev(edev->ndev);
2169 err2:
2170         qed_ops->common->slowpath_stop(cdev);
2171 err1:
2172         qed_ops->common->remove(cdev);
2173 err0:
2174         return rc;
2175 }
2176
2177 static int qede_probe(struct pci_dev *pdev, const struct pci_device_id *id)
2178 {
2179         u32 dp_module = 0;
2180         u8 dp_level = 0;
2181
2182         qede_config_debug(debug, &dp_module, &dp_level);
2183
2184         return __qede_probe(pdev, dp_module, dp_level,
2185                             QEDE_PROBE_NORMAL);
2186 }
2187
2188 enum qede_remove_mode {
2189         QEDE_REMOVE_NORMAL,
2190 };
2191
2192 static void __qede_remove(struct pci_dev *pdev, enum qede_remove_mode mode)
2193 {
2194         struct net_device *ndev = pci_get_drvdata(pdev);
2195         struct qede_dev *edev = netdev_priv(ndev);
2196         struct qed_dev *cdev = edev->cdev;
2197
2198         DP_INFO(edev, "Starting qede_remove\n");
2199
2200         cancel_delayed_work_sync(&edev->sp_task);
2201         unregister_netdev(ndev);
2202
2203         edev->ops->common->set_power_state(cdev, PCI_D0);
2204
2205         pci_set_drvdata(pdev, NULL);
2206
2207         free_netdev(ndev);
2208
2209         /* Use global ops since we've freed edev */
2210         qed_ops->common->slowpath_stop(cdev);
2211         qed_ops->common->remove(cdev);
2212
2213         pr_notice("Ending successfully qede_remove\n");
2214 }
2215
2216 static void qede_remove(struct pci_dev *pdev)
2217 {
2218         __qede_remove(pdev, QEDE_REMOVE_NORMAL);
2219 }
2220
2221 /* -------------------------------------------------------------------------
2222  * START OF LOAD / UNLOAD
2223  * -------------------------------------------------------------------------
2224  */
2225
2226 static int qede_set_num_queues(struct qede_dev *edev)
2227 {
2228         int rc;
2229         u16 rss_num;
2230
2231         /* Setup queues according to possible resources*/
2232         if (edev->req_rss)
2233                 rss_num = edev->req_rss;
2234         else
2235                 rss_num = netif_get_num_default_rss_queues() *
2236                           edev->dev_info.common.num_hwfns;
2237
2238         rss_num = min_t(u16, QEDE_MAX_RSS_CNT(edev), rss_num);
2239
2240         rc = edev->ops->common->set_fp_int(edev->cdev, rss_num);
2241         if (rc > 0) {
2242                 /* Managed to request interrupts for our queues */
2243                 edev->num_rss = rc;
2244                 DP_INFO(edev, "Managed %d [of %d] RSS queues\n",
2245                         QEDE_RSS_CNT(edev), rss_num);
2246                 rc = 0;
2247         }
2248         return rc;
2249 }
2250
2251 static void qede_free_mem_sb(struct qede_dev *edev,
2252                              struct qed_sb_info *sb_info)
2253 {
2254         if (sb_info->sb_virt)
2255                 dma_free_coherent(&edev->pdev->dev, sizeof(*sb_info->sb_virt),
2256                                   (void *)sb_info->sb_virt, sb_info->sb_phys);
2257 }
2258
2259 /* This function allocates fast-path status block memory */
2260 static int qede_alloc_mem_sb(struct qede_dev *edev,
2261                              struct qed_sb_info *sb_info,
2262                              u16 sb_id)
2263 {
2264         struct status_block *sb_virt;
2265         dma_addr_t sb_phys;
2266         int rc;
2267
2268         sb_virt = dma_alloc_coherent(&edev->pdev->dev,
2269                                      sizeof(*sb_virt),
2270                                      &sb_phys, GFP_KERNEL);
2271         if (!sb_virt) {
2272                 DP_ERR(edev, "Status block allocation failed\n");
2273                 return -ENOMEM;
2274         }
2275
2276         rc = edev->ops->common->sb_init(edev->cdev, sb_info,
2277                                         sb_virt, sb_phys, sb_id,
2278                                         QED_SB_TYPE_L2_QUEUE);
2279         if (rc) {
2280                 DP_ERR(edev, "Status block initialization failed\n");
2281                 dma_free_coherent(&edev->pdev->dev, sizeof(*sb_virt),
2282                                   sb_virt, sb_phys);
2283                 return rc;
2284         }
2285
2286         return 0;
2287 }
2288
2289 static void qede_free_rx_buffers(struct qede_dev *edev,
2290                                  struct qede_rx_queue *rxq)
2291 {
2292         u16 i;
2293
2294         for (i = rxq->sw_rx_cons; i != rxq->sw_rx_prod; i++) {
2295                 struct sw_rx_data *rx_buf;
2296                 struct page *data;
2297
2298                 rx_buf = &rxq->sw_rx_ring[i & NUM_RX_BDS_MAX];
2299                 data = rx_buf->data;
2300
2301                 dma_unmap_page(&edev->pdev->dev,
2302                                rx_buf->mapping,
2303                                PAGE_SIZE, DMA_FROM_DEVICE);
2304
2305                 rx_buf->data = NULL;
2306                 __free_page(data);
2307         }
2308 }
2309
2310 static void qede_free_sge_mem(struct qede_dev *edev,
2311                               struct qede_rx_queue *rxq) {
2312         int i;
2313
2314         if (edev->gro_disable)
2315                 return;
2316
2317         for (i = 0; i < ETH_TPA_MAX_AGGS_NUM; i++) {
2318                 struct qede_agg_info *tpa_info = &rxq->tpa_info[i];
2319                 struct sw_rx_data *replace_buf = &tpa_info->replace_buf;
2320
2321                 if (replace_buf->data) {
2322                         dma_unmap_page(&edev->pdev->dev,
2323                                        dma_unmap_addr(replace_buf, mapping),
2324                                        PAGE_SIZE, DMA_FROM_DEVICE);
2325                         __free_page(replace_buf->data);
2326                 }
2327         }
2328 }
2329
2330 static void qede_free_mem_rxq(struct qede_dev *edev,
2331                               struct qede_rx_queue *rxq)
2332 {
2333         qede_free_sge_mem(edev, rxq);
2334
2335         /* Free rx buffers */
2336         qede_free_rx_buffers(edev, rxq);
2337
2338         /* Free the parallel SW ring */
2339         kfree(rxq->sw_rx_ring);
2340
2341         /* Free the real RQ ring used by FW */
2342         edev->ops->common->chain_free(edev->cdev, &rxq->rx_bd_ring);
2343         edev->ops->common->chain_free(edev->cdev, &rxq->rx_comp_ring);
2344 }
2345
2346 static int qede_alloc_rx_buffer(struct qede_dev *edev,
2347                                 struct qede_rx_queue *rxq)
2348 {
2349         struct sw_rx_data *sw_rx_data;
2350         struct eth_rx_bd *rx_bd;
2351         dma_addr_t mapping;
2352         struct page *data;
2353         u16 rx_buf_size;
2354
2355         rx_buf_size = rxq->rx_buf_size;
2356
2357         data = alloc_pages(GFP_ATOMIC, 0);
2358         if (unlikely(!data)) {
2359                 DP_NOTICE(edev, "Failed to allocate Rx data [page]\n");
2360                 return -ENOMEM;
2361         }
2362
2363         /* Map the entire page as it would be used
2364          * for multiple RX buffer segment size mapping.
2365          */
2366         mapping = dma_map_page(&edev->pdev->dev, data, 0,
2367                                PAGE_SIZE, DMA_FROM_DEVICE);
2368         if (unlikely(dma_mapping_error(&edev->pdev->dev, mapping))) {
2369                 __free_page(data);
2370                 DP_NOTICE(edev, "Failed to map Rx buffer\n");
2371                 return -ENOMEM;
2372         }
2373
2374         sw_rx_data = &rxq->sw_rx_ring[rxq->sw_rx_prod & NUM_RX_BDS_MAX];
2375         sw_rx_data->page_offset = 0;
2376         sw_rx_data->data = data;
2377         sw_rx_data->mapping = mapping;
2378
2379         /* Advance PROD and get BD pointer */
2380         rx_bd = (struct eth_rx_bd *)qed_chain_produce(&rxq->rx_bd_ring);
2381         WARN_ON(!rx_bd);
2382         rx_bd->addr.hi = cpu_to_le32(upper_32_bits(mapping));
2383         rx_bd->addr.lo = cpu_to_le32(lower_32_bits(mapping));
2384
2385         rxq->sw_rx_prod++;
2386
2387         return 0;
2388 }
2389
2390 static int qede_alloc_sge_mem(struct qede_dev *edev,
2391                               struct qede_rx_queue *rxq)
2392 {
2393         dma_addr_t mapping;
2394         int i;
2395
2396         if (edev->gro_disable)
2397                 return 0;
2398
2399         if (edev->ndev->mtu > PAGE_SIZE) {
2400                 edev->gro_disable = 1;
2401                 return 0;
2402         }
2403
2404         for (i = 0; i < ETH_TPA_MAX_AGGS_NUM; i++) {
2405                 struct qede_agg_info *tpa_info = &rxq->tpa_info[i];
2406                 struct sw_rx_data *replace_buf = &tpa_info->replace_buf;
2407
2408                 replace_buf->data = alloc_pages(GFP_ATOMIC, 0);
2409                 if (unlikely(!replace_buf->data)) {
2410                         DP_NOTICE(edev,
2411                                   "Failed to allocate TPA skb pool [replacement buffer]\n");
2412                         goto err;
2413                 }
2414
2415                 mapping = dma_map_page(&edev->pdev->dev, replace_buf->data, 0,
2416                                        rxq->rx_buf_size, DMA_FROM_DEVICE);
2417                 if (unlikely(dma_mapping_error(&edev->pdev->dev, mapping))) {
2418                         DP_NOTICE(edev,
2419                                   "Failed to map TPA replacement buffer\n");
2420                         goto err;
2421                 }
2422
2423                 dma_unmap_addr_set(replace_buf, mapping, mapping);
2424                 tpa_info->replace_buf.page_offset = 0;
2425
2426                 tpa_info->replace_buf_mapping = mapping;
2427                 tpa_info->agg_state = QEDE_AGG_STATE_NONE;
2428         }
2429
2430         return 0;
2431 err:
2432         qede_free_sge_mem(edev, rxq);
2433         edev->gro_disable = 1;
2434         return -ENOMEM;
2435 }
2436
2437 /* This function allocates all memory needed per Rx queue */
2438 static int qede_alloc_mem_rxq(struct qede_dev *edev,
2439                               struct qede_rx_queue *rxq)
2440 {
2441         int i, rc, size;
2442
2443         rxq->num_rx_buffers = edev->q_num_rx_buffers;
2444
2445         rxq->rx_buf_size = NET_IP_ALIGN + ETH_OVERHEAD +
2446                            edev->ndev->mtu;
2447         if (rxq->rx_buf_size > PAGE_SIZE)
2448                 rxq->rx_buf_size = PAGE_SIZE;
2449
2450         /* Segment size to spilt a page in multiple equal parts */
2451         rxq->rx_buf_seg_size = roundup_pow_of_two(rxq->rx_buf_size);
2452
2453         /* Allocate the parallel driver ring for Rx buffers */
2454         size = sizeof(*rxq->sw_rx_ring) * RX_RING_SIZE;
2455         rxq->sw_rx_ring = kzalloc(size, GFP_KERNEL);
2456         if (!rxq->sw_rx_ring) {
2457                 DP_ERR(edev, "Rx buffers ring allocation failed\n");
2458                 rc = -ENOMEM;
2459                 goto err;
2460         }
2461
2462         /* Allocate FW Rx ring  */
2463         rc = edev->ops->common->chain_alloc(edev->cdev,
2464                                             QED_CHAIN_USE_TO_CONSUME_PRODUCE,
2465                                             QED_CHAIN_MODE_NEXT_PTR,
2466                                             RX_RING_SIZE,
2467                                             sizeof(struct eth_rx_bd),
2468                                             &rxq->rx_bd_ring);
2469
2470         if (rc)
2471                 goto err;
2472
2473         /* Allocate FW completion ring */
2474         rc = edev->ops->common->chain_alloc(edev->cdev,
2475                                             QED_CHAIN_USE_TO_CONSUME,
2476                                             QED_CHAIN_MODE_PBL,
2477                                             RX_RING_SIZE,
2478                                             sizeof(union eth_rx_cqe),
2479                                             &rxq->rx_comp_ring);
2480         if (rc)
2481                 goto err;
2482
2483         /* Allocate buffers for the Rx ring */
2484         for (i = 0; i < rxq->num_rx_buffers; i++) {
2485                 rc = qede_alloc_rx_buffer(edev, rxq);
2486                 if (rc) {
2487                         DP_ERR(edev,
2488                                "Rx buffers allocation failed at index %d\n", i);
2489                         goto err;
2490                 }
2491         }
2492
2493         rc = qede_alloc_sge_mem(edev, rxq);
2494 err:
2495         return rc;
2496 }
2497
2498 static void qede_free_mem_txq(struct qede_dev *edev,
2499                               struct qede_tx_queue *txq)
2500 {
2501         /* Free the parallel SW ring */
2502         kfree(txq->sw_tx_ring);
2503
2504         /* Free the real RQ ring used by FW */
2505         edev->ops->common->chain_free(edev->cdev, &txq->tx_pbl);
2506 }
2507
2508 /* This function allocates all memory needed per Tx queue */
2509 static int qede_alloc_mem_txq(struct qede_dev *edev,
2510                               struct qede_tx_queue *txq)
2511 {
2512         int size, rc;
2513         union eth_tx_bd_types *p_virt;
2514
2515         txq->num_tx_buffers = edev->q_num_tx_buffers;
2516
2517         /* Allocate the parallel driver ring for Tx buffers */
2518         size = sizeof(*txq->sw_tx_ring) * NUM_TX_BDS_MAX;
2519         txq->sw_tx_ring = kzalloc(size, GFP_KERNEL);
2520         if (!txq->sw_tx_ring) {
2521                 DP_NOTICE(edev, "Tx buffers ring allocation failed\n");
2522                 goto err;
2523         }
2524
2525         rc = edev->ops->common->chain_alloc(edev->cdev,
2526                                             QED_CHAIN_USE_TO_CONSUME_PRODUCE,
2527                                             QED_CHAIN_MODE_PBL,
2528                                             NUM_TX_BDS_MAX,
2529                                             sizeof(*p_virt),
2530                                             &txq->tx_pbl);
2531         if (rc)
2532                 goto err;
2533
2534         return 0;
2535
2536 err:
2537         qede_free_mem_txq(edev, txq);
2538         return -ENOMEM;
2539 }
2540
2541 /* This function frees all memory of a single fp */
2542 static void qede_free_mem_fp(struct qede_dev *edev,
2543                              struct qede_fastpath *fp)
2544 {
2545         int tc;
2546
2547         qede_free_mem_sb(edev, fp->sb_info);
2548
2549         qede_free_mem_rxq(edev, fp->rxq);
2550
2551         for (tc = 0; tc < edev->num_tc; tc++)
2552                 qede_free_mem_txq(edev, &fp->txqs[tc]);
2553 }
2554
2555 /* This function allocates all memory needed for a single fp (i.e. an entity
2556  * which contains status block, one rx queue and multiple per-TC tx queues.
2557  */
2558 static int qede_alloc_mem_fp(struct qede_dev *edev,
2559                              struct qede_fastpath *fp)
2560 {
2561         int rc, tc;
2562
2563         rc = qede_alloc_mem_sb(edev, fp->sb_info, fp->rss_id);
2564         if (rc)
2565                 goto err;
2566
2567         rc = qede_alloc_mem_rxq(edev, fp->rxq);
2568         if (rc)
2569                 goto err;
2570
2571         for (tc = 0; tc < edev->num_tc; tc++) {
2572                 rc = qede_alloc_mem_txq(edev, &fp->txqs[tc]);
2573                 if (rc)
2574                         goto err;
2575         }
2576
2577         return 0;
2578 err:
2579         return rc;
2580 }
2581
2582 static void qede_free_mem_load(struct qede_dev *edev)
2583 {
2584         int i;
2585
2586         for_each_rss(i) {
2587                 struct qede_fastpath *fp = &edev->fp_array[i];
2588
2589                 qede_free_mem_fp(edev, fp);
2590         }
2591 }
2592
2593 /* This function allocates all qede memory at NIC load. */
2594 static int qede_alloc_mem_load(struct qede_dev *edev)
2595 {
2596         int rc = 0, rss_id;
2597
2598         for (rss_id = 0; rss_id < QEDE_RSS_CNT(edev); rss_id++) {
2599                 struct qede_fastpath *fp = &edev->fp_array[rss_id];
2600
2601                 rc = qede_alloc_mem_fp(edev, fp);
2602                 if (rc) {
2603                         DP_ERR(edev,
2604                                "Failed to allocate memory for fastpath - rss id = %d\n",
2605                                rss_id);
2606                         qede_free_mem_load(edev);
2607                         return rc;
2608                 }
2609         }
2610
2611         return 0;
2612 }
2613
2614 /* This function inits fp content and resets the SB, RXQ and TXQ structures */
2615 static void qede_init_fp(struct qede_dev *edev)
2616 {
2617         int rss_id, txq_index, tc;
2618         struct qede_fastpath *fp;
2619
2620         for_each_rss(rss_id) {
2621                 fp = &edev->fp_array[rss_id];
2622
2623                 fp->edev = edev;
2624                 fp->rss_id = rss_id;
2625
2626                 memset((void *)&fp->napi, 0, sizeof(fp->napi));
2627
2628                 memset((void *)fp->sb_info, 0, sizeof(*fp->sb_info));
2629
2630                 memset((void *)fp->rxq, 0, sizeof(*fp->rxq));
2631                 fp->rxq->rxq_id = rss_id;
2632
2633                 memset((void *)fp->txqs, 0, (edev->num_tc * sizeof(*fp->txqs)));
2634                 for (tc = 0; tc < edev->num_tc; tc++) {
2635                         txq_index = tc * QEDE_RSS_CNT(edev) + rss_id;
2636                         fp->txqs[tc].index = txq_index;
2637                 }
2638
2639                 snprintf(fp->name, sizeof(fp->name), "%s-fp-%d",
2640                          edev->ndev->name, rss_id);
2641         }
2642
2643         edev->gro_disable = !(edev->ndev->features & NETIF_F_GRO);
2644 }
2645
2646 static int qede_set_real_num_queues(struct qede_dev *edev)
2647 {
2648         int rc = 0;
2649
2650         rc = netif_set_real_num_tx_queues(edev->ndev, QEDE_TSS_CNT(edev));
2651         if (rc) {
2652                 DP_NOTICE(edev, "Failed to set real number of Tx queues\n");
2653                 return rc;
2654         }
2655         rc = netif_set_real_num_rx_queues(edev->ndev, QEDE_RSS_CNT(edev));
2656         if (rc) {
2657                 DP_NOTICE(edev, "Failed to set real number of Rx queues\n");
2658                 return rc;
2659         }
2660
2661         return 0;
2662 }
2663
2664 static void qede_napi_disable_remove(struct qede_dev *edev)
2665 {
2666         int i;
2667
2668         for_each_rss(i) {
2669                 napi_disable(&edev->fp_array[i].napi);
2670
2671                 netif_napi_del(&edev->fp_array[i].napi);
2672         }
2673 }
2674
2675 static void qede_napi_add_enable(struct qede_dev *edev)
2676 {
2677         int i;
2678
2679         /* Add NAPI objects */
2680         for_each_rss(i) {
2681                 netif_napi_add(edev->ndev, &edev->fp_array[i].napi,
2682                                qede_poll, NAPI_POLL_WEIGHT);
2683                 napi_enable(&edev->fp_array[i].napi);
2684         }
2685 }
2686
2687 static void qede_sync_free_irqs(struct qede_dev *edev)
2688 {
2689         int i;
2690
2691         for (i = 0; i < edev->int_info.used_cnt; i++) {
2692                 if (edev->int_info.msix_cnt) {
2693                         synchronize_irq(edev->int_info.msix[i].vector);
2694                         free_irq(edev->int_info.msix[i].vector,
2695                                  &edev->fp_array[i]);
2696                 } else {
2697                         edev->ops->common->simd_handler_clean(edev->cdev, i);
2698                 }
2699         }
2700
2701         edev->int_info.used_cnt = 0;
2702 }
2703
2704 static int qede_req_msix_irqs(struct qede_dev *edev)
2705 {
2706         int i, rc;
2707
2708         /* Sanitize number of interrupts == number of prepared RSS queues */
2709         if (QEDE_RSS_CNT(edev) > edev->int_info.msix_cnt) {
2710                 DP_ERR(edev,
2711                        "Interrupt mismatch: %d RSS queues > %d MSI-x vectors\n",
2712                        QEDE_RSS_CNT(edev), edev->int_info.msix_cnt);
2713                 return -EINVAL;
2714         }
2715
2716         for (i = 0; i < QEDE_RSS_CNT(edev); i++) {
2717                 rc = request_irq(edev->int_info.msix[i].vector,
2718                                  qede_msix_fp_int, 0, edev->fp_array[i].name,
2719                                  &edev->fp_array[i]);
2720                 if (rc) {
2721                         DP_ERR(edev, "Request fp %d irq failed\n", i);
2722                         qede_sync_free_irqs(edev);
2723                         return rc;
2724                 }
2725                 DP_VERBOSE(edev, NETIF_MSG_INTR,
2726                            "Requested fp irq for %s [entry %d]. Cookie is at %p\n",
2727                            edev->fp_array[i].name, i,
2728                            &edev->fp_array[i]);
2729                 edev->int_info.used_cnt++;
2730         }
2731
2732         return 0;
2733 }
2734
2735 static void qede_simd_fp_handler(void *cookie)
2736 {
2737         struct qede_fastpath *fp = (struct qede_fastpath *)cookie;
2738
2739         napi_schedule_irqoff(&fp->napi);
2740 }
2741
2742 static int qede_setup_irqs(struct qede_dev *edev)
2743 {
2744         int i, rc = 0;
2745
2746         /* Learn Interrupt configuration */
2747         rc = edev->ops->common->get_fp_int(edev->cdev, &edev->int_info);
2748         if (rc)
2749                 return rc;
2750
2751         if (edev->int_info.msix_cnt) {
2752                 rc = qede_req_msix_irqs(edev);
2753                 if (rc)
2754                         return rc;
2755                 edev->ndev->irq = edev->int_info.msix[0].vector;
2756         } else {
2757                 const struct qed_common_ops *ops;
2758
2759                 /* qed should learn receive the RSS ids and callbacks */
2760                 ops = edev->ops->common;
2761                 for (i = 0; i < QEDE_RSS_CNT(edev); i++)
2762                         ops->simd_handler_config(edev->cdev,
2763                                                  &edev->fp_array[i], i,
2764                                                  qede_simd_fp_handler);
2765                 edev->int_info.used_cnt = QEDE_RSS_CNT(edev);
2766         }
2767         return 0;
2768 }
2769
2770 static int qede_drain_txq(struct qede_dev *edev,
2771                           struct qede_tx_queue *txq,
2772                           bool allow_drain)
2773 {
2774         int rc, cnt = 1000;
2775
2776         while (txq->sw_tx_cons != txq->sw_tx_prod) {
2777                 if (!cnt) {
2778                         if (allow_drain) {
2779                                 DP_NOTICE(edev,
2780                                           "Tx queue[%d] is stuck, requesting MCP to drain\n",
2781                                           txq->index);
2782                                 rc = edev->ops->common->drain(edev->cdev);
2783                                 if (rc)
2784                                         return rc;
2785                                 return qede_drain_txq(edev, txq, false);
2786                         }
2787                         DP_NOTICE(edev,
2788                                   "Timeout waiting for tx queue[%d]: PROD=%d, CONS=%d\n",
2789                                   txq->index, txq->sw_tx_prod,
2790                                   txq->sw_tx_cons);
2791                         return -ENODEV;
2792                 }
2793                 cnt--;
2794                 usleep_range(1000, 2000);
2795                 barrier();
2796         }
2797
2798         /* FW finished processing, wait for HW to transmit all tx packets */
2799         usleep_range(1000, 2000);
2800
2801         return 0;
2802 }
2803
2804 static int qede_stop_queues(struct qede_dev *edev)
2805 {
2806         struct qed_update_vport_params vport_update_params;
2807         struct qed_dev *cdev = edev->cdev;
2808         int rc, tc, i;
2809
2810         /* Disable the vport */
2811         memset(&vport_update_params, 0, sizeof(vport_update_params));
2812         vport_update_params.vport_id = 0;
2813         vport_update_params.update_vport_active_flg = 1;
2814         vport_update_params.vport_active_flg = 0;
2815         vport_update_params.update_rss_flg = 0;
2816
2817         rc = edev->ops->vport_update(cdev, &vport_update_params);
2818         if (rc) {
2819                 DP_ERR(edev, "Failed to update vport\n");
2820                 return rc;
2821         }
2822
2823         /* Flush Tx queues. If needed, request drain from MCP */
2824         for_each_rss(i) {
2825                 struct qede_fastpath *fp = &edev->fp_array[i];
2826
2827                 for (tc = 0; tc < edev->num_tc; tc++) {
2828                         struct qede_tx_queue *txq = &fp->txqs[tc];
2829
2830                         rc = qede_drain_txq(edev, txq, true);
2831                         if (rc)
2832                                 return rc;
2833                 }
2834         }
2835
2836         /* Stop all Queues in reverse order*/
2837         for (i = QEDE_RSS_CNT(edev) - 1; i >= 0; i--) {
2838                 struct qed_stop_rxq_params rx_params;
2839
2840                 /* Stop the Tx Queue(s)*/
2841                 for (tc = 0; tc < edev->num_tc; tc++) {
2842                         struct qed_stop_txq_params tx_params;
2843
2844                         tx_params.rss_id = i;
2845                         tx_params.tx_queue_id = tc * QEDE_RSS_CNT(edev) + i;
2846                         rc = edev->ops->q_tx_stop(cdev, &tx_params);
2847                         if (rc) {
2848                                 DP_ERR(edev, "Failed to stop TXQ #%d\n",
2849                                        tx_params.tx_queue_id);
2850                                 return rc;
2851                         }
2852                 }
2853
2854                 /* Stop the Rx Queue*/
2855                 memset(&rx_params, 0, sizeof(rx_params));
2856                 rx_params.rss_id = i;
2857                 rx_params.rx_queue_id = i;
2858
2859                 rc = edev->ops->q_rx_stop(cdev, &rx_params);
2860                 if (rc) {
2861                         DP_ERR(edev, "Failed to stop RXQ #%d\n", i);
2862                         return rc;
2863                 }
2864         }
2865
2866         /* Stop the vport */
2867         rc = edev->ops->vport_stop(cdev, 0);
2868         if (rc)
2869                 DP_ERR(edev, "Failed to stop VPORT\n");
2870
2871         return rc;
2872 }
2873
2874 static int qede_start_queues(struct qede_dev *edev)
2875 {
2876         int rc, tc, i;
2877         int vlan_removal_en = 1;
2878         struct qed_dev *cdev = edev->cdev;
2879         struct qed_update_vport_rss_params *rss_params = &edev->rss_params;
2880         struct qed_update_vport_params vport_update_params;
2881         struct qed_queue_start_common_params q_params;
2882         struct qed_start_vport_params start = {0};
2883
2884         if (!edev->num_rss) {
2885                 DP_ERR(edev,
2886                        "Cannot update V-VPORT as active as there are no Rx queues\n");
2887                 return -EINVAL;
2888         }
2889
2890         start.gro_enable = !edev->gro_disable;
2891         start.mtu = edev->ndev->mtu;
2892         start.vport_id = 0;
2893         start.drop_ttl0 = true;
2894         start.remove_inner_vlan = vlan_removal_en;
2895
2896         rc = edev->ops->vport_start(cdev, &start);
2897
2898         if (rc) {
2899                 DP_ERR(edev, "Start V-PORT failed %d\n", rc);
2900                 return rc;
2901         }
2902
2903         DP_VERBOSE(edev, NETIF_MSG_IFUP,
2904                    "Start vport ramrod passed, vport_id = %d, MTU = %d, vlan_removal_en = %d\n",
2905                    start.vport_id, edev->ndev->mtu + 0xe, vlan_removal_en);
2906
2907         for_each_rss(i) {
2908                 struct qede_fastpath *fp = &edev->fp_array[i];
2909                 dma_addr_t phys_table = fp->rxq->rx_comp_ring.pbl.p_phys_table;
2910
2911                 memset(&q_params, 0, sizeof(q_params));
2912                 q_params.rss_id = i;
2913                 q_params.queue_id = i;
2914                 q_params.vport_id = 0;
2915                 q_params.sb = fp->sb_info->igu_sb_id;
2916                 q_params.sb_idx = RX_PI;
2917
2918                 rc = edev->ops->q_rx_start(cdev, &q_params,
2919                                            fp->rxq->rx_buf_size,
2920                                            fp->rxq->rx_bd_ring.p_phys_addr,
2921                                            phys_table,
2922                                            fp->rxq->rx_comp_ring.page_cnt,
2923                                            &fp->rxq->hw_rxq_prod_addr);
2924                 if (rc) {
2925                         DP_ERR(edev, "Start RXQ #%d failed %d\n", i, rc);
2926                         return rc;
2927                 }
2928
2929                 fp->rxq->hw_cons_ptr = &fp->sb_info->sb_virt->pi_array[RX_PI];
2930
2931                 qede_update_rx_prod(edev, fp->rxq);
2932
2933                 for (tc = 0; tc < edev->num_tc; tc++) {
2934                         struct qede_tx_queue *txq = &fp->txqs[tc];
2935                         int txq_index = tc * QEDE_RSS_CNT(edev) + i;
2936
2937                         memset(&q_params, 0, sizeof(q_params));
2938                         q_params.rss_id = i;
2939                         q_params.queue_id = txq_index;
2940                         q_params.vport_id = 0;
2941                         q_params.sb = fp->sb_info->igu_sb_id;
2942                         q_params.sb_idx = TX_PI(tc);
2943
2944                         rc = edev->ops->q_tx_start(cdev, &q_params,
2945                                                    txq->tx_pbl.pbl.p_phys_table,
2946                                                    txq->tx_pbl.page_cnt,
2947                                                    &txq->doorbell_addr);
2948                         if (rc) {
2949                                 DP_ERR(edev, "Start TXQ #%d failed %d\n",
2950                                        txq_index, rc);
2951                                 return rc;
2952                         }
2953
2954                         txq->hw_cons_ptr =
2955                                 &fp->sb_info->sb_virt->pi_array[TX_PI(tc)];
2956                         SET_FIELD(txq->tx_db.data.params,
2957                                   ETH_DB_DATA_DEST, DB_DEST_XCM);
2958                         SET_FIELD(txq->tx_db.data.params, ETH_DB_DATA_AGG_CMD,
2959                                   DB_AGG_CMD_SET);
2960                         SET_FIELD(txq->tx_db.data.params,
2961                                   ETH_DB_DATA_AGG_VAL_SEL,
2962                                   DQ_XCM_ETH_TX_BD_PROD_CMD);
2963
2964                         txq->tx_db.data.agg_flags = DQ_XCM_ETH_DQ_CF_CMD;
2965                 }
2966         }
2967
2968         /* Prepare and send the vport enable */
2969         memset(&vport_update_params, 0, sizeof(vport_update_params));
2970         vport_update_params.vport_id = start.vport_id;
2971         vport_update_params.update_vport_active_flg = 1;
2972         vport_update_params.vport_active_flg = 1;
2973
2974         /* Fill struct with RSS params */
2975         if (QEDE_RSS_CNT(edev) > 1) {
2976                 vport_update_params.update_rss_flg = 1;
2977                 for (i = 0; i < 128; i++)
2978                         rss_params->rss_ind_table[i] =
2979                         ethtool_rxfh_indir_default(i, QEDE_RSS_CNT(edev));
2980                 netdev_rss_key_fill(rss_params->rss_key,
2981                                     sizeof(rss_params->rss_key));
2982         } else {
2983                 memset(rss_params, 0, sizeof(*rss_params));
2984         }
2985         memcpy(&vport_update_params.rss_params, rss_params,
2986                sizeof(*rss_params));
2987
2988         rc = edev->ops->vport_update(cdev, &vport_update_params);
2989         if (rc) {
2990                 DP_ERR(edev, "Update V-PORT failed %d\n", rc);
2991                 return rc;
2992         }
2993
2994         return 0;
2995 }
2996
2997 static int qede_set_mcast_rx_mac(struct qede_dev *edev,
2998                                  enum qed_filter_xcast_params_type opcode,
2999                                  unsigned char *mac, int num_macs)
3000 {
3001         struct qed_filter_params filter_cmd;
3002         int i;
3003
3004         memset(&filter_cmd, 0, sizeof(filter_cmd));
3005         filter_cmd.type = QED_FILTER_TYPE_MCAST;
3006         filter_cmd.filter.mcast.type = opcode;
3007         filter_cmd.filter.mcast.num = num_macs;
3008
3009         for (i = 0; i < num_macs; i++, mac += ETH_ALEN)
3010                 ether_addr_copy(filter_cmd.filter.mcast.mac[i], mac);
3011
3012         return edev->ops->filter_config(edev->cdev, &filter_cmd);
3013 }
3014
3015 enum qede_unload_mode {
3016         QEDE_UNLOAD_NORMAL,
3017 };
3018
3019 static void qede_unload(struct qede_dev *edev, enum qede_unload_mode mode)
3020 {
3021         struct qed_link_params link_params;
3022         int rc;
3023
3024         DP_INFO(edev, "Starting qede unload\n");
3025
3026         mutex_lock(&edev->qede_lock);
3027         edev->state = QEDE_STATE_CLOSED;
3028
3029         /* Close OS Tx */
3030         netif_tx_disable(edev->ndev);
3031         netif_carrier_off(edev->ndev);
3032
3033         /* Reset the link */
3034         memset(&link_params, 0, sizeof(link_params));
3035         link_params.link_up = false;
3036         edev->ops->common->set_link(edev->cdev, &link_params);
3037         rc = qede_stop_queues(edev);
3038         if (rc) {
3039                 qede_sync_free_irqs(edev);
3040                 goto out;
3041         }
3042
3043         DP_INFO(edev, "Stopped Queues\n");
3044
3045         qede_vlan_mark_nonconfigured(edev);
3046         edev->ops->fastpath_stop(edev->cdev);
3047
3048         /* Release the interrupts */
3049         qede_sync_free_irqs(edev);
3050         edev->ops->common->set_fp_int(edev->cdev, 0);
3051
3052         qede_napi_disable_remove(edev);
3053
3054         qede_free_mem_load(edev);
3055         qede_free_fp_array(edev);
3056
3057 out:
3058         mutex_unlock(&edev->qede_lock);
3059         DP_INFO(edev, "Ending qede unload\n");
3060 }
3061
3062 enum qede_load_mode {
3063         QEDE_LOAD_NORMAL,
3064 };
3065
3066 static int qede_load(struct qede_dev *edev, enum qede_load_mode mode)
3067 {
3068         struct qed_link_params link_params;
3069         struct qed_link_output link_output;
3070         int rc;
3071
3072         DP_INFO(edev, "Starting qede load\n");
3073
3074         rc = qede_set_num_queues(edev);
3075         if (rc)
3076                 goto err0;
3077
3078         rc = qede_alloc_fp_array(edev);
3079         if (rc)
3080                 goto err0;
3081
3082         qede_init_fp(edev);
3083
3084         rc = qede_alloc_mem_load(edev);
3085         if (rc)
3086                 goto err1;
3087         DP_INFO(edev, "Allocated %d RSS queues on %d TC/s\n",
3088                 QEDE_RSS_CNT(edev), edev->num_tc);
3089
3090         rc = qede_set_real_num_queues(edev);
3091         if (rc)
3092                 goto err2;
3093
3094         qede_napi_add_enable(edev);
3095         DP_INFO(edev, "Napi added and enabled\n");
3096
3097         rc = qede_setup_irqs(edev);
3098         if (rc)
3099                 goto err3;
3100         DP_INFO(edev, "Setup IRQs succeeded\n");
3101
3102         rc = qede_start_queues(edev);
3103         if (rc)
3104                 goto err4;
3105         DP_INFO(edev, "Start VPORT, RXQ and TXQ succeeded\n");
3106
3107         /* Add primary mac and set Rx filters */
3108         ether_addr_copy(edev->primary_mac, edev->ndev->dev_addr);
3109
3110         mutex_lock(&edev->qede_lock);
3111         edev->state = QEDE_STATE_OPEN;
3112         mutex_unlock(&edev->qede_lock);
3113
3114         /* Program un-configured VLANs */
3115         qede_configure_vlan_filters(edev);
3116
3117         /* Ask for link-up using current configuration */
3118         memset(&link_params, 0, sizeof(link_params));
3119         link_params.link_up = true;
3120         edev->ops->common->set_link(edev->cdev, &link_params);
3121
3122         /* Query whether link is already-up */
3123         memset(&link_output, 0, sizeof(link_output));
3124         edev->ops->common->get_link(edev->cdev, &link_output);
3125         qede_link_update(edev, &link_output);
3126
3127         DP_INFO(edev, "Ending successfully qede load\n");
3128
3129         return 0;
3130
3131 err4:
3132         qede_sync_free_irqs(edev);
3133         memset(&edev->int_info.msix_cnt, 0, sizeof(struct qed_int_info));
3134 err3:
3135         qede_napi_disable_remove(edev);
3136 err2:
3137         qede_free_mem_load(edev);
3138 err1:
3139         edev->ops->common->set_fp_int(edev->cdev, 0);
3140         qede_free_fp_array(edev);
3141         edev->num_rss = 0;
3142 err0:
3143         return rc;
3144 }
3145
3146 void qede_reload(struct qede_dev *edev,
3147                  void (*func)(struct qede_dev *, union qede_reload_args *),
3148                  union qede_reload_args *args)
3149 {
3150         qede_unload(edev, QEDE_UNLOAD_NORMAL);
3151         /* Call function handler to update parameters
3152          * needed for function load.
3153          */
3154         if (func)
3155                 func(edev, args);
3156
3157         qede_load(edev, QEDE_LOAD_NORMAL);
3158
3159         mutex_lock(&edev->qede_lock);
3160         qede_config_rx_mode(edev->ndev);
3161         mutex_unlock(&edev->qede_lock);
3162 }
3163
3164 /* called with rtnl_lock */
3165 static int qede_open(struct net_device *ndev)
3166 {
3167         struct qede_dev *edev = netdev_priv(ndev);
3168
3169         netif_carrier_off(ndev);
3170
3171         edev->ops->common->set_power_state(edev->cdev, PCI_D0);
3172
3173         return qede_load(edev, QEDE_LOAD_NORMAL);
3174 }
3175
3176 static int qede_close(struct net_device *ndev)
3177 {
3178         struct qede_dev *edev = netdev_priv(ndev);
3179
3180         qede_unload(edev, QEDE_UNLOAD_NORMAL);
3181
3182         return 0;
3183 }
3184
3185 static void qede_link_update(void *dev, struct qed_link_output *link)
3186 {
3187         struct qede_dev *edev = dev;
3188
3189         if (!netif_running(edev->ndev)) {
3190                 DP_VERBOSE(edev, NETIF_MSG_LINK, "Interface is not running\n");
3191                 return;
3192         }
3193
3194         if (link->link_up) {
3195                 if (!netif_carrier_ok(edev->ndev)) {
3196                         DP_NOTICE(edev, "Link is up\n");
3197                         netif_tx_start_all_queues(edev->ndev);
3198                         netif_carrier_on(edev->ndev);
3199                 }
3200         } else {
3201                 if (netif_carrier_ok(edev->ndev)) {
3202                         DP_NOTICE(edev, "Link is down\n");
3203                         netif_tx_disable(edev->ndev);
3204                         netif_carrier_off(edev->ndev);
3205                 }
3206         }
3207 }
3208
3209 static int qede_set_mac_addr(struct net_device *ndev, void *p)
3210 {
3211         struct qede_dev *edev = netdev_priv(ndev);
3212         struct sockaddr *addr = p;
3213         int rc;
3214
3215         ASSERT_RTNL(); /* @@@TBD To be removed */
3216
3217         DP_INFO(edev, "Set_mac_addr called\n");
3218
3219         if (!is_valid_ether_addr(addr->sa_data)) {
3220                 DP_NOTICE(edev, "The MAC address is not valid\n");
3221                 return -EFAULT;
3222         }
3223
3224         ether_addr_copy(ndev->dev_addr, addr->sa_data);
3225
3226         if (!netif_running(ndev))  {
3227                 DP_NOTICE(edev, "The device is currently down\n");
3228                 return 0;
3229         }
3230
3231         /* Remove the previous primary mac */
3232         rc = qede_set_ucast_rx_mac(edev, QED_FILTER_XCAST_TYPE_DEL,
3233                                    edev->primary_mac);
3234         if (rc)
3235                 return rc;
3236
3237         /* Add MAC filter according to the new unicast HW MAC address */
3238         ether_addr_copy(edev->primary_mac, ndev->dev_addr);
3239         return qede_set_ucast_rx_mac(edev, QED_FILTER_XCAST_TYPE_ADD,
3240                                       edev->primary_mac);
3241 }
3242
3243 static int
3244 qede_configure_mcast_filtering(struct net_device *ndev,
3245                                enum qed_filter_rx_mode_type *accept_flags)
3246 {
3247         struct qede_dev *edev = netdev_priv(ndev);
3248         unsigned char *mc_macs, *temp;
3249         struct netdev_hw_addr *ha;
3250         int rc = 0, mc_count;
3251         size_t size;
3252
3253         size = 64 * ETH_ALEN;
3254
3255         mc_macs = kzalloc(size, GFP_KERNEL);
3256         if (!mc_macs) {
3257                 DP_NOTICE(edev,
3258                           "Failed to allocate memory for multicast MACs\n");
3259                 rc = -ENOMEM;
3260                 goto exit;
3261         }
3262
3263         temp = mc_macs;
3264
3265         /* Remove all previously configured MAC filters */
3266         rc = qede_set_mcast_rx_mac(edev, QED_FILTER_XCAST_TYPE_DEL,
3267                                    mc_macs, 1);
3268         if (rc)
3269                 goto exit;
3270
3271         netif_addr_lock_bh(ndev);
3272
3273         mc_count = netdev_mc_count(ndev);
3274         if (mc_count < 64) {
3275                 netdev_for_each_mc_addr(ha, ndev) {
3276                         ether_addr_copy(temp, ha->addr);
3277                         temp += ETH_ALEN;
3278                 }
3279         }
3280
3281         netif_addr_unlock_bh(ndev);
3282
3283         /* Check for all multicast @@@TBD resource allocation */
3284         if ((ndev->flags & IFF_ALLMULTI) ||
3285             (mc_count > 64)) {
3286                 if (*accept_flags == QED_FILTER_RX_MODE_TYPE_REGULAR)
3287                         *accept_flags = QED_FILTER_RX_MODE_TYPE_MULTI_PROMISC;
3288         } else {
3289                 /* Add all multicast MAC filters */
3290                 rc = qede_set_mcast_rx_mac(edev, QED_FILTER_XCAST_TYPE_ADD,
3291                                            mc_macs, mc_count);
3292         }
3293
3294 exit:
3295         kfree(mc_macs);
3296         return rc;
3297 }
3298
3299 static void qede_set_rx_mode(struct net_device *ndev)
3300 {
3301         struct qede_dev *edev = netdev_priv(ndev);
3302
3303         DP_INFO(edev, "qede_set_rx_mode called\n");
3304
3305         if (edev->state != QEDE_STATE_OPEN) {
3306                 DP_INFO(edev,
3307                         "qede_set_rx_mode called while interface is down\n");
3308         } else {
3309                 set_bit(QEDE_SP_RX_MODE, &edev->sp_flags);
3310                 schedule_delayed_work(&edev->sp_task, 0);
3311         }
3312 }
3313
3314 /* Must be called with qede_lock held */
3315 static void qede_config_rx_mode(struct net_device *ndev)
3316 {
3317         enum qed_filter_rx_mode_type accept_flags = QED_FILTER_TYPE_UCAST;
3318         struct qede_dev *edev = netdev_priv(ndev);
3319         struct qed_filter_params rx_mode;
3320         unsigned char *uc_macs, *temp;
3321         struct netdev_hw_addr *ha;
3322         int rc, uc_count;
3323         size_t size;
3324
3325         netif_addr_lock_bh(ndev);
3326
3327         uc_count = netdev_uc_count(ndev);
3328         size = uc_count * ETH_ALEN;
3329
3330         uc_macs = kzalloc(size, GFP_ATOMIC);
3331         if (!uc_macs) {
3332                 DP_NOTICE(edev, "Failed to allocate memory for unicast MACs\n");
3333                 netif_addr_unlock_bh(ndev);
3334                 return;
3335         }
3336
3337         temp = uc_macs;
3338         netdev_for_each_uc_addr(ha, ndev) {
3339                 ether_addr_copy(temp, ha->addr);
3340                 temp += ETH_ALEN;
3341         }
3342
3343         netif_addr_unlock_bh(ndev);
3344
3345         /* Configure the struct for the Rx mode */
3346         memset(&rx_mode, 0, sizeof(struct qed_filter_params));
3347         rx_mode.type = QED_FILTER_TYPE_RX_MODE;
3348
3349         /* Remove all previous unicast secondary macs and multicast macs
3350          * (configrue / leave the primary mac)
3351          */
3352         rc = qede_set_ucast_rx_mac(edev, QED_FILTER_XCAST_TYPE_REPLACE,
3353                                    edev->primary_mac);
3354         if (rc)
3355                 goto out;
3356
3357         /* Check for promiscuous */
3358         if ((ndev->flags & IFF_PROMISC) ||
3359             (uc_count > 15)) { /* @@@TBD resource allocation - 1 */
3360                 accept_flags = QED_FILTER_RX_MODE_TYPE_PROMISC;
3361         } else {
3362                 /* Add MAC filters according to the unicast secondary macs */
3363                 int i;
3364
3365                 temp = uc_macs;
3366                 for (i = 0; i < uc_count; i++) {
3367                         rc = qede_set_ucast_rx_mac(edev,
3368                                                    QED_FILTER_XCAST_TYPE_ADD,
3369                                                    temp);
3370                         if (rc)
3371                                 goto out;
3372
3373                         temp += ETH_ALEN;
3374                 }
3375
3376                 rc = qede_configure_mcast_filtering(ndev, &accept_flags);
3377                 if (rc)
3378                         goto out;
3379         }
3380
3381         /* take care of VLAN mode */
3382         if (ndev->flags & IFF_PROMISC) {
3383                 qede_config_accept_any_vlan(edev, true);
3384         } else if (!edev->non_configured_vlans) {
3385                 /* It's possible that accept_any_vlan mode is set due to a
3386                  * previous setting of IFF_PROMISC. If vlan credits are
3387                  * sufficient, disable accept_any_vlan.
3388                  */
3389                 qede_config_accept_any_vlan(edev, false);
3390         }
3391
3392         rx_mode.filter.accept_flags = accept_flags;
3393         edev->ops->filter_config(edev->cdev, &rx_mode);
3394 out:
3395         kfree(uc_macs);
3396 }