drivers/net/ethernet/cisco/enic/enic_main.c

   1 /*
   2  * Copyright 2008-2010 Cisco Systems, Inc.  All rights reserved.
   3  * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
   4  *
   5  * This program is free software; you may redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; version 2 of the License.
   8  *
   9  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  10  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  11  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  12  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  13  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  14  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  15  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  16  * SOFTWARE.
  17  *
  18  */
  19
  20 #include <linux/module.h>
  21 #include <linux/kernel.h>
  22 #include <linux/string.h>
  23 #include <linux/errno.h>
  24 #include <linux/types.h>
  25 #include <linux/init.h>
  26 #include <linux/interrupt.h>
  27 #include <linux/workqueue.h>
  28 #include <linux/pci.h>
  29 #include <linux/netdevice.h>
  30 #include <linux/etherdevice.h>
  31 #include <linux/if.h>
  32 #include <linux/if_ether.h>
  33 #include <linux/if_vlan.h>
  34 #include <linux/in.h>
  35 #include <linux/ip.h>
  36 #include <linux/ipv6.h>
  37 #include <linux/tcp.h>
  38 #include <linux/rtnetlink.h>
  39 #include <linux/prefetch.h>
  40 #include <net/ip6_checksum.h>
  41 #include <linux/ktime.h>
  42 #ifdef CONFIG_RFS_ACCEL
  43 #include <linux/cpu_rmap.h>
  44 #endif
  45 #ifdef CONFIG_NET_RX_BUSY_POLL
  46 #include <net/busy_poll.h>
  47 #endif
  48
  49 #include "cq_enet_desc.h"
  50 #include "vnic_dev.h"
  51 #include "vnic_intr.h"
  52 #include "vnic_stats.h"
  53 #include "vnic_vic.h"
  54 #include "enic_res.h"
  55 #include "enic.h"
  56 #include "enic_dev.h"
  57 #include "enic_pp.h"
  58 #include "enic_clsf.h"
  59
  60 #define ENIC_NOTIFY_TIMER_PERIOD        (2 * HZ)
  61 #define WQ_ENET_MAX_DESC_LEN            (1 << WQ_ENET_LEN_BITS)
  62 #define MAX_TSO                         (1 << 16)
  63 #define ENIC_DESC_MAX_SPLITS            (MAX_TSO / WQ_ENET_MAX_DESC_LEN + 1)
  64
  65 #define PCI_DEVICE_ID_CISCO_VIC_ENET         0x0043  /* ethernet vnic */
  66 #define PCI_DEVICE_ID_CISCO_VIC_ENET_DYN     0x0044  /* enet dynamic vnic */
  67 #define PCI_DEVICE_ID_CISCO_VIC_ENET_VF      0x0071  /* enet SRIOV VF */
  68
  69 /* Supported devices */
  70 static const struct pci_device_id enic_id_table[] = {
  71         { PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET) },
  72         { PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET_DYN) },
  73         { PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET_VF) },
  74         { 0, }  /* end of table */
  75 };
  76
  77 MODULE_DESCRIPTION(DRV_DESCRIPTION);
  78 MODULE_AUTHOR("Scott Feldman <scofeldm@cisco.com>");
  79 MODULE_LICENSE("GPL");
  80 MODULE_VERSION(DRV_VERSION);
  81 MODULE_DEVICE_TABLE(pci, enic_id_table);
  82
  83 #define ENIC_LARGE_PKT_THRESHOLD                1000
  84 #define ENIC_MAX_COALESCE_TIMERS                10
  85 /*  Interrupt moderation table, which will be used to decide the
  86  *  coalescing timer values
  87  *  {rx_rate in Mbps, mapping percentage of the range}
  88  */
  89 struct enic_intr_mod_table mod_table[ENIC_MAX_COALESCE_TIMERS + 1] = {
  90         {4000,  0},
  91         {4400, 10},
  92         {5060, 20},
  93         {5230, 30},
  94         {5540, 40},
  95         {5820, 50},
  96         {6120, 60},
  97         {6435, 70},
  98         {6745, 80},
  99         {7000, 90},
 100         {0xFFFFFFFF, 100}
 101 };
 102
 103 /* This table helps the driver to pick different ranges for rx coalescing
 104  * timer depending on the link speed.
 105  */
 106 struct enic_intr_mod_range mod_range[ENIC_MAX_LINK_SPEEDS] = {
 107         {0,  0}, /* 0  - 4  Gbps */
 108         {0,  3}, /* 4  - 10 Gbps */
 109         {3,  6}, /* 10 - 40 Gbps */
 110 };
 111
 112 int enic_is_dynamic(struct enic *enic)
 113 {
 114         return enic->pdev->device == PCI_DEVICE_ID_CISCO_VIC_ENET_DYN;
 115 }
 116
 117 int enic_sriov_enabled(struct enic *enic)
 118 {
 119         return (enic->priv_flags & ENIC_SRIOV_ENABLED) ? 1 : 0;
 120 }
 121
 122 static int enic_is_sriov_vf(struct enic *enic)
 123 {
 124         return enic->pdev->device == PCI_DEVICE_ID_CISCO_VIC_ENET_VF;
 125 }
 126
 127 int enic_is_valid_vf(struct enic *enic, int vf)
 128 {
 129 #ifdef CONFIG_PCI_IOV
 130         return vf >= 0 && vf < enic->num_vfs;
 131 #else
 132         return 0;
 133 #endif
 134 }
 135
 136 static void enic_free_wq_buf(struct vnic_wq *wq, struct vnic_wq_buf *buf)
 137 {
 138         struct enic *enic = vnic_dev_priv(wq->vdev);
 139
 140         if (buf->sop)
 141                 pci_unmap_single(enic->pdev, buf->dma_addr,
 142                         buf->len, PCI_DMA_TODEVICE);
 143         else
 144                 pci_unmap_page(enic->pdev, buf->dma_addr,
 145                         buf->len, PCI_DMA_TODEVICE);
 146
 147         if (buf->os_buf)
 148                 dev_kfree_skb_any(buf->os_buf);
 149 }
 150
 151 static void enic_wq_free_buf(struct vnic_wq *wq,
 152         struct cq_desc *cq_desc, struct vnic_wq_buf *buf, void *opaque)
 153 {
 154         enic_free_wq_buf(wq, buf);
 155 }
 156
 157 static int enic_wq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc,
 158         u8 type, u16 q_number, u16 completed_index, void *opaque)
 159 {
 160         struct enic *enic = vnic_dev_priv(vdev);
 161
 162         spin_lock(&enic->wq_lock[q_number]);
 163
 164         vnic_wq_service(&enic->wq[q_number], cq_desc,
 165                 completed_index, enic_wq_free_buf,
 166                 opaque);
 167
 168         if (netif_tx_queue_stopped(netdev_get_tx_queue(enic->netdev, q_number)) &&
 169             vnic_wq_desc_avail(&enic->wq[q_number]) >=
 170             (MAX_SKB_FRAGS + ENIC_DESC_MAX_SPLITS))
 171                 netif_wake_subqueue(enic->netdev, q_number);
 172
 173         spin_unlock(&enic->wq_lock[q_number]);
 174
 175         return 0;
 176 }
 177
 178 static void enic_log_q_error(struct enic *enic)
 179 {
 180         unsigned int i;
 181         u32 error_status;
 182
 183         for (i = 0; i < enic->wq_count; i++) {
 184                 error_status = vnic_wq_error_status(&enic->wq[i]);
 185                 if (error_status)
 186                         netdev_err(enic->netdev, "WQ[%d] error_status %d\n",
 187                                 i, error_status);
 188         }
 189
 190         for (i = 0; i < enic->rq_count; i++) {
 191                 error_status = vnic_rq_error_status(&enic->rq[i]);
 192                 if (error_status)
 193                         netdev_err(enic->netdev, "RQ[%d] error_status %d\n",
 194                                 i, error_status);
 195         }
 196 }
 197
 198 static void enic_msglvl_check(struct enic *enic)
 199 {
 200         u32 msg_enable = vnic_dev_msg_lvl(enic->vdev);
 201
 202         if (msg_enable != enic->msg_enable) {
 203                 netdev_info(enic->netdev, "msg lvl changed from 0x%x to 0x%x\n",
 204                         enic->msg_enable, msg_enable);
 205                 enic->msg_enable = msg_enable;
 206         }
 207 }
 208
 209 static void enic_mtu_check(struct enic *enic)
 210 {
 211         u32 mtu = vnic_dev_mtu(enic->vdev);
 212         struct net_device *netdev = enic->netdev;
 213
 214         if (mtu && mtu != enic->port_mtu) {
 215                 enic->port_mtu = mtu;
 216                 if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic)) {
 217                         mtu = max_t(int, ENIC_MIN_MTU,
 218                                 min_t(int, ENIC_MAX_MTU, mtu));
 219                         if (mtu != netdev->mtu)
 220                                 schedule_work(&enic->change_mtu_work);
 221                 } else {
 222                         if (mtu < netdev->mtu)
 223                                 netdev_warn(netdev,
 224                                         "interface MTU (%d) set higher "
 225                                         "than switch port MTU (%d)\n",
 226                                         netdev->mtu, mtu);
 227                 }
 228         }
 229 }
 230
 231 static void enic_link_check(struct enic *enic)
 232 {
 233         int link_status = vnic_dev_link_status(enic->vdev);
 234         int carrier_ok = netif_carrier_ok(enic->netdev);
 235
 236         if (link_status && !carrier_ok) {
 237                 netdev_info(enic->netdev, "Link UP\n");
 238                 netif_carrier_on(enic->netdev);
 239         } else if (!link_status && carrier_ok) {
 240                 netdev_info(enic->netdev, "Link DOWN\n");
 241                 netif_carrier_off(enic->netdev);
 242         }
 243 }
 244
 245 static void enic_notify_check(struct enic *enic)
 246 {
 247         enic_msglvl_check(enic);
 248         enic_mtu_check(enic);
 249         enic_link_check(enic);
 250 }
 251
 252 #define ENIC_TEST_INTR(pba, i) (pba & (1 << i))
 253
 254 static irqreturn_t enic_isr_legacy(int irq, void *data)
 255 {
 256         struct net_device *netdev = data;
 257         struct enic *enic = netdev_priv(netdev);
 258         unsigned int io_intr = enic_legacy_io_intr();
 259         unsigned int err_intr = enic_legacy_err_intr();
 260         unsigned int notify_intr = enic_legacy_notify_intr();
 261         u32 pba;
 262
 263         vnic_intr_mask(&enic->intr[io_intr]);
 264
 265         pba = vnic_intr_legacy_pba(enic->legacy_pba);
 266         if (!pba) {
 267                 vnic_intr_unmask(&enic->intr[io_intr]);
 268                 return IRQ_NONE;        /* not our interrupt */
 269         }
 270
 271         if (ENIC_TEST_INTR(pba, notify_intr)) {
 272                 vnic_intr_return_all_credits(&enic->intr[notify_intr]);
 273                 enic_notify_check(enic);
 274         }
 275
 276         if (ENIC_TEST_INTR(pba, err_intr)) {
 277                 vnic_intr_return_all_credits(&enic->intr[err_intr]);
 278                 enic_log_q_error(enic);
 279                 /* schedule recovery from WQ/RQ error */
 280                 schedule_work(&enic->reset);
 281                 return IRQ_HANDLED;
 282         }
 283
 284         if (ENIC_TEST_INTR(pba, io_intr)) {
 285                 if (napi_schedule_prep(&enic->napi[0]))
 286                         __napi_schedule(&enic->napi[0]);
 287         } else {
 288                 vnic_intr_unmask(&enic->intr[io_intr]);
 289         }
 290
 291         return IRQ_HANDLED;
 292 }
 293
 294 static irqreturn_t enic_isr_msi(int irq, void *data)
 295 {
 296         struct enic *enic = data;
 297
 298         /* With MSI, there is no sharing of interrupts, so this is
 299          * our interrupt and there is no need to ack it.  The device
 300          * is not providing per-vector masking, so the OS will not
 301          * write to PCI config space to mask/unmask the interrupt.
 302          * We're using mask_on_assertion for MSI, so the device
 303          * automatically masks the interrupt when the interrupt is
 304          * generated.  Later, when exiting polling, the interrupt
 305          * will be unmasked (see enic_poll).
 306          *
 307          * Also, the device uses the same PCIe Traffic Class (TC)
 308          * for Memory Write data and MSI, so there are no ordering
 309          * issues; the MSI will always arrive at the Root Complex
 310          * _after_ corresponding Memory Writes (i.e. descriptor
 311          * writes).
 312          */
 313
 314         napi_schedule(&enic->napi[0]);
 315
 316         return IRQ_HANDLED;
 317 }
 318
 319 static irqreturn_t enic_isr_msix(int irq, void *data)
 320 {
 321         struct napi_struct *napi = data;
 322
 323         napi_schedule(napi);
 324
 325         return IRQ_HANDLED;
 326 }
 327
 328 static irqreturn_t enic_isr_msix_err(int irq, void *data)
 329 {
 330         struct enic *enic = data;
 331         unsigned int intr = enic_msix_err_intr(enic);
 332
 333         vnic_intr_return_all_credits(&enic->intr[intr]);
 334
 335         enic_log_q_error(enic);
 336
 337         /* schedule recovery from WQ/RQ error */
 338         schedule_work(&enic->reset);
 339
 340         return IRQ_HANDLED;
 341 }
 342
 343 static irqreturn_t enic_isr_msix_notify(int irq, void *data)
 344 {
 345         struct enic *enic = data;
 346         unsigned int intr = enic_msix_notify_intr(enic);
 347
 348         vnic_intr_return_all_credits(&enic->intr[intr]);
 349         enic_notify_check(enic);
 350
 351         return IRQ_HANDLED;
 352 }
 353
 354 static inline void enic_queue_wq_skb_cont(struct enic *enic,
 355         struct vnic_wq *wq, struct sk_buff *skb,
 356         unsigned int len_left, int loopback)
 357 {
 358         const skb_frag_t *frag;
 359
 360         /* Queue additional data fragments */
 361         for (frag = skb_shinfo(skb)->frags; len_left; frag++) {
 362                 len_left -= skb_frag_size(frag);
 363                 enic_queue_wq_desc_cont(wq, skb,
 364                         skb_frag_dma_map(&enic->pdev->dev,
 365                                          frag, 0, skb_frag_size(frag),
 366                                          DMA_TO_DEVICE),
 367                         skb_frag_size(frag),
 368                         (len_left == 0),        /* EOP? */
 369                         loopback);
 370         }
 371 }
 372
 373 static inline void enic_queue_wq_skb_vlan(struct enic *enic,
 374         struct vnic_wq *wq, struct sk_buff *skb,
 375         int vlan_tag_insert, unsigned int vlan_tag, int loopback)
 376 {
 377         unsigned int head_len = skb_headlen(skb);
 378         unsigned int len_left = skb->len - head_len;
 379         int eop = (len_left == 0);
 380
 381         /* Queue the main skb fragment. The fragments are no larger
 382          * than max MTU(9000)+ETH_HDR_LEN(14) bytes, which is less
 383          * than WQ_ENET_MAX_DESC_LEN length. So only one descriptor
 384          * per fragment is queued.
 385          */
 386         enic_queue_wq_desc(wq, skb,
 387                 pci_map_single(enic->pdev, skb->data,
 388                         head_len, PCI_DMA_TODEVICE),
 389                 head_len,
 390                 vlan_tag_insert, vlan_tag,
 391                 eop, loopback);
 392
 393         if (!eop)
 394                 enic_queue_wq_skb_cont(enic, wq, skb, len_left, loopback);
 395 }
 396
 397 static inline void enic_queue_wq_skb_csum_l4(struct enic *enic,
 398         struct vnic_wq *wq, struct sk_buff *skb,
 399         int vlan_tag_insert, unsigned int vlan_tag, int loopback)
 400 {
 401         unsigned int head_len = skb_headlen(skb);
 402         unsigned int len_left = skb->len - head_len;
 403         unsigned int hdr_len = skb_checksum_start_offset(skb);
 404         unsigned int csum_offset = hdr_len + skb->csum_offset;
 405         int eop = (len_left == 0);
 406
 407         /* Queue the main skb fragment. The fragments are no larger
 408          * than max MTU(9000)+ETH_HDR_LEN(14) bytes, which is less
 409          * than WQ_ENET_MAX_DESC_LEN length. So only one descriptor
 410          * per fragment is queued.
 411          */
 412         enic_queue_wq_desc_csum_l4(wq, skb,
 413                 pci_map_single(enic->pdev, skb->data,
 414                         head_len, PCI_DMA_TODEVICE),
 415                 head_len,
 416                 csum_offset,
 417                 hdr_len,
 418                 vlan_tag_insert, vlan_tag,
 419                 eop, loopback);
 420
 421         if (!eop)
 422                 enic_queue_wq_skb_cont(enic, wq, skb, len_left, loopback);
 423 }
 424
 425 static inline void enic_queue_wq_skb_tso(struct enic *enic,
 426         struct vnic_wq *wq, struct sk_buff *skb, unsigned int mss,
 427         int vlan_tag_insert, unsigned int vlan_tag, int loopback)
 428 {
 429         unsigned int frag_len_left = skb_headlen(skb);
 430         unsigned int len_left = skb->len - frag_len_left;
 431         unsigned int hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
 432         int eop = (len_left == 0);
 433         unsigned int len;
 434         dma_addr_t dma_addr;
 435         unsigned int offset = 0;
 436         skb_frag_t *frag;
 437
 438         /* Preload TCP csum field with IP pseudo hdr calculated
 439          * with IP length set to zero.  HW will later add in length
 440          * to each TCP segment resulting from the TSO.
 441          */
 442
 443         if (skb->protocol == cpu_to_be16(ETH_P_IP)) {
 444                 ip_hdr(skb)->check = 0;
 445                 tcp_hdr(skb)->check = ~csum_tcpudp_magic(ip_hdr(skb)->saddr,
 446                         ip_hdr(skb)->daddr, 0, IPPROTO_TCP, 0);
 447         } else if (skb->protocol == cpu_to_be16(ETH_P_IPV6)) {
 448                 tcp_hdr(skb)->check = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
 449                         &ipv6_hdr(skb)->daddr, 0, IPPROTO_TCP, 0);
 450         }
 451
 452         /* Queue WQ_ENET_MAX_DESC_LEN length descriptors
 453          * for the main skb fragment
 454          */
 455         while (frag_len_left) {
 456                 len = min(frag_len_left, (unsigned int)WQ_ENET_MAX_DESC_LEN);
 457                 dma_addr = pci_map_single(enic->pdev, skb->data + offset,
 458                                 len, PCI_DMA_TODEVICE);
 459                 enic_queue_wq_desc_tso(wq, skb,
 460                         dma_addr,
 461                         len,
 462                         mss, hdr_len,
 463                         vlan_tag_insert, vlan_tag,
 464                         eop && (len == frag_len_left), loopback);
 465                 frag_len_left -= len;
 466                 offset += len;
 467         }
 468
 469         if (eop)
 470                 return;
 471
 472         /* Queue WQ_ENET_MAX_DESC_LEN length descriptors
 473          * for additional data fragments
 474          */
 475         for (frag = skb_shinfo(skb)->frags; len_left; frag++) {
 476                 len_left -= skb_frag_size(frag);
 477                 frag_len_left = skb_frag_size(frag);
 478                 offset = 0;
 479
 480                 while (frag_len_left) {
 481                         len = min(frag_len_left,
 482                                 (unsigned int)WQ_ENET_MAX_DESC_LEN);
 483                         dma_addr = skb_frag_dma_map(&enic->pdev->dev, frag,
 484                                                     offset, len,
 485                                                     DMA_TO_DEVICE);
 486                         enic_queue_wq_desc_cont(wq, skb,
 487                                 dma_addr,
 488                                 len,
 489                                 (len_left == 0) &&
 490                                 (len == frag_len_left),         /* EOP? */
 491                                 loopback);
 492                         frag_len_left -= len;
 493                         offset += len;
 494                 }
 495         }
 496 }
 497
 498 static inline void enic_queue_wq_skb(struct enic *enic,
 499         struct vnic_wq *wq, struct sk_buff *skb)
 500 {
 501         unsigned int mss = skb_shinfo(skb)->gso_size;
 502         unsigned int vlan_tag = 0;
 503         int vlan_tag_insert = 0;
 504         int loopback = 0;
 505
 506         if (vlan_tx_tag_present(skb)) {
 507                 /* VLAN tag from trunking driver */
 508                 vlan_tag_insert = 1;
 509                 vlan_tag = vlan_tx_tag_get(skb);
 510         } else if (enic->loop_enable) {
 511                 vlan_tag = enic->loop_tag;
 512                 loopback = 1;
 513         }
 514
 515         if (mss)
 516                 enic_queue_wq_skb_tso(enic, wq, skb, mss,
 517                         vlan_tag_insert, vlan_tag, loopback);
 518         else if (skb->ip_summed == CHECKSUM_PARTIAL)
 519                 enic_queue_wq_skb_csum_l4(enic, wq, skb,
 520                         vlan_tag_insert, vlan_tag, loopback);
 521         else
 522                 enic_queue_wq_skb_vlan(enic, wq, skb,
 523                         vlan_tag_insert, vlan_tag, loopback);
 524 }
 525
 526 /* netif_tx_lock held, process context with BHs disabled, or BH */
 527 static netdev_tx_t enic_hard_start_xmit(struct sk_buff *skb,
 528         struct net_device *netdev)
 529 {
 530         struct enic *enic = netdev_priv(netdev);
 531         struct vnic_wq *wq;
 532         unsigned long flags;
 533         unsigned int txq_map;
 534
 535         if (skb->len <= 0) {
 536                 dev_kfree_skb_any(skb);
 537                 return NETDEV_TX_OK;
 538         }
 539
 540         txq_map = skb_get_queue_mapping(skb) % enic->wq_count;
 541         wq = &enic->wq[txq_map];
 542
 543         /* Non-TSO sends must fit within ENIC_NON_TSO_MAX_DESC descs,
 544          * which is very likely.  In the off chance it's going to take
 545          * more than * ENIC_NON_TSO_MAX_DESC, linearize the skb.
 546          */
 547
 548         if (skb_shinfo(skb)->gso_size == 0 &&
 549             skb_shinfo(skb)->nr_frags + 1 > ENIC_NON_TSO_MAX_DESC &&
 550             skb_linearize(skb)) {
 551                 dev_kfree_skb_any(skb);
 552                 return NETDEV_TX_OK;
 553         }
 554
 555         spin_lock_irqsave(&enic->wq_lock[txq_map], flags);
 556
 557         if (vnic_wq_desc_avail(wq) <
 558             skb_shinfo(skb)->nr_frags + ENIC_DESC_MAX_SPLITS) {
 559                 netif_tx_stop_queue(netdev_get_tx_queue(netdev, txq_map));
 560                 /* This is a hard error, log it */
 561                 netdev_err(netdev, "BUG! Tx ring full when queue awake!\n");
 562                 spin_unlock_irqrestore(&enic->wq_lock[txq_map], flags);
 563                 return NETDEV_TX_BUSY;
 564         }
 565
 566         enic_queue_wq_skb(enic, wq, skb);
 567
 568         if (vnic_wq_desc_avail(wq) < MAX_SKB_FRAGS + ENIC_DESC_MAX_SPLITS)
 569                 netif_tx_stop_queue(netdev_get_tx_queue(netdev, txq_map));
 570
 571         spin_unlock_irqrestore(&enic->wq_lock[txq_map], flags);
 572
 573         return NETDEV_TX_OK;
 574 }
 575
 576 /* dev_base_lock rwlock held, nominally process context */
 577 static struct rtnl_link_stats64 *enic_get_stats(struct net_device *netdev,
 578                                                 struct rtnl_link_stats64 *net_stats)
 579 {
 580         struct enic *enic = netdev_priv(netdev);
 581         struct vnic_stats *stats;
 582
 583         enic_dev_stats_dump(enic, &stats);
 584
 585         net_stats->tx_packets = stats->tx.tx_frames_ok;
 586         net_stats->tx_bytes = stats->tx.tx_bytes_ok;
 587         net_stats->tx_errors = stats->tx.tx_errors;
 588         net_stats->tx_dropped = stats->tx.tx_drops;
 589
 590         net_stats->rx_packets = stats->rx.rx_frames_ok;
 591         net_stats->rx_bytes = stats->rx.rx_bytes_ok;
 592         net_stats->rx_errors = stats->rx.rx_errors;
 593         net_stats->multicast = stats->rx.rx_multicast_frames_ok;
 594         net_stats->rx_over_errors = enic->rq_truncated_pkts;
 595         net_stats->rx_crc_errors = enic->rq_bad_fcs;
 596         net_stats->rx_dropped = stats->rx.rx_no_bufs + stats->rx.rx_drop;
 597
 598         return net_stats;
 599 }
 600
 601 static int enic_mc_sync(struct net_device *netdev, const u8 *mc_addr)
 602 {
 603         struct enic *enic = netdev_priv(netdev);
 604
 605         if (enic->mc_count == ENIC_MULTICAST_PERFECT_FILTERS) {
 606                 unsigned int mc_count = netdev_mc_count(netdev);
 607
 608                 netdev_warn(netdev, "Registering only %d out of %d multicast addresses\n",
 609                             ENIC_MULTICAST_PERFECT_FILTERS, mc_count);
 610
 611                 return -ENOSPC;
 612         }
 613
 614         enic_dev_add_addr(enic, mc_addr);
 615         enic->mc_count++;
 616
 617         return 0;
 618 }
 619
 620 static int enic_mc_unsync(struct net_device *netdev, const u8 *mc_addr)
 621 {
 622         struct enic *enic = netdev_priv(netdev);
 623
 624         enic_dev_del_addr(enic, mc_addr);
 625         enic->mc_count--;
 626
 627         return 0;
 628 }
 629
 630 static int enic_uc_sync(struct net_device *netdev, const u8 *uc_addr)
 631 {
 632         struct enic *enic = netdev_priv(netdev);
 633
 634         if (enic->uc_count == ENIC_UNICAST_PERFECT_FILTERS) {
 635                 unsigned int uc_count = netdev_uc_count(netdev);
 636
 637                 netdev_warn(netdev, "Registering only %d out of %d unicast addresses\n",
 638                             ENIC_UNICAST_PERFECT_FILTERS, uc_count);
 639
 640                 return -ENOSPC;
 641         }
 642
 643         enic_dev_add_addr(enic, uc_addr);
 644         enic->uc_count++;
 645
 646         return 0;
 647 }
 648
 649 static int enic_uc_unsync(struct net_device *netdev, const u8 *uc_addr)
 650 {
 651         struct enic *enic = netdev_priv(netdev);
 652
 653         enic_dev_del_addr(enic, uc_addr);
 654         enic->uc_count--;
 655
 656         return 0;
 657 }
 658
 659 void enic_reset_addr_lists(struct enic *enic)
 660 {
 661         struct net_device *netdev = enic->netdev;
 662
 663         __dev_uc_unsync(netdev, NULL);
 664         __dev_mc_unsync(netdev, NULL);
 665
 666         enic->mc_count = 0;
 667         enic->uc_count = 0;
 668         enic->flags = 0;
 669 }
 670
 671 static int enic_set_mac_addr(struct net_device *netdev, char *addr)
 672 {
 673         struct enic *enic = netdev_priv(netdev);
 674
 675         if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic)) {
 676                 if (!is_valid_ether_addr(addr) && !is_zero_ether_addr(addr))
 677                         return -EADDRNOTAVAIL;
 678         } else {
 679                 if (!is_valid_ether_addr(addr))
 680                         return -EADDRNOTAVAIL;
 681         }
 682
 683         memcpy(netdev->dev_addr, addr, netdev->addr_len);
 684
 685         return 0;
 686 }
 687
 688 static int enic_set_mac_address_dynamic(struct net_device *netdev, void *p)
 689 {
 690         struct enic *enic = netdev_priv(netdev);
 691         struct sockaddr *saddr = p;
 692         char *addr = saddr->sa_data;
 693         int err;
 694
 695         if (netif_running(enic->netdev)) {
 696                 err = enic_dev_del_station_addr(enic);
 697                 if (err)
 698                         return err;
 699         }
 700
 701         err = enic_set_mac_addr(netdev, addr);
 702         if (err)
 703                 return err;
 704
 705         if (netif_running(enic->netdev)) {
 706                 err = enic_dev_add_station_addr(enic);
 707                 if (err)
 708                         return err;
 709         }
 710
 711         return err;
 712 }
 713
 714 static int enic_set_mac_address(struct net_device *netdev, void *p)
 715 {
 716         struct sockaddr *saddr = p;
 717         char *addr = saddr->sa_data;
 718         struct enic *enic = netdev_priv(netdev);
 719         int err;
 720
 721         err = enic_dev_del_station_addr(enic);
 722         if (err)
 723                 return err;
 724
 725         err = enic_set_mac_addr(netdev, addr);
 726         if (err)
 727                 return err;
 728
 729         return enic_dev_add_station_addr(enic);
 730 }
 731
 732 /* netif_tx_lock held, BHs disabled */
 733 static void enic_set_rx_mode(struct net_device *netdev)
 734 {
 735         struct enic *enic = netdev_priv(netdev);
 736         int directed = 1;
 737         int multicast = (netdev->flags & IFF_MULTICAST) ? 1 : 0;
 738         int broadcast = (netdev->flags & IFF_BROADCAST) ? 1 : 0;
 739         int promisc = (netdev->flags & IFF_PROMISC) ||
 740                 netdev_uc_count(netdev) > ENIC_UNICAST_PERFECT_FILTERS;
 741         int allmulti = (netdev->flags & IFF_ALLMULTI) ||
 742                 netdev_mc_count(netdev) > ENIC_MULTICAST_PERFECT_FILTERS;
 743         unsigned int flags = netdev->flags |
 744                 (allmulti ? IFF_ALLMULTI : 0) |
 745                 (promisc ? IFF_PROMISC : 0);
 746
 747         if (enic->flags != flags) {
 748                 enic->flags = flags;
 749                 enic_dev_packet_filter(enic, directed,
 750                         multicast, broadcast, promisc, allmulti);
 751         }
 752
 753         if (!promisc) {
 754                 __dev_uc_sync(netdev, enic_uc_sync, enic_uc_unsync);
 755                 if (!allmulti)
 756                         __dev_mc_sync(netdev, enic_mc_sync, enic_mc_unsync);
 757         }
 758 }
 759
 760 /* netif_tx_lock held, BHs disabled */
 761 static void enic_tx_timeout(struct net_device *netdev)
 762 {
 763         struct enic *enic = netdev_priv(netdev);
 764         schedule_work(&enic->reset);
 765 }
 766
 767 static int enic_set_vf_mac(struct net_device *netdev, int vf, u8 *mac)
 768 {
 769         struct enic *enic = netdev_priv(netdev);
 770         struct enic_port_profile *pp;
 771         int err;
 772
 773         ENIC_PP_BY_INDEX(enic, vf, pp, &err);
 774         if (err)
 775                 return err;
 776
 777         if (is_valid_ether_addr(mac) || is_zero_ether_addr(mac)) {
 778                 if (vf == PORT_SELF_VF) {
 779                         memcpy(pp->vf_mac, mac, ETH_ALEN);
 780                         return 0;
 781                 } else {
 782                         /*
 783                          * For sriov vf's set the mac in hw
 784                          */
 785                         ENIC_DEVCMD_PROXY_BY_INDEX(vf, err, enic,
 786                                 vnic_dev_set_mac_addr, mac);
 787                         return enic_dev_status_to_errno(err);
 788                 }
 789         } else
 790                 return -EINVAL;
 791 }
 792
 793 static int enic_set_vf_port(struct net_device *netdev, int vf,
 794         struct nlattr *port[])
 795 {
 796         struct enic *enic = netdev_priv(netdev);
 797         struct enic_port_profile prev_pp;
 798         struct enic_port_profile *pp;
 799         int err = 0, restore_pp = 1;
 800
 801         ENIC_PP_BY_INDEX(enic, vf, pp, &err);
 802         if (err)
 803                 return err;
 804
 805         if (!port[IFLA_PORT_REQUEST])
 806                 return -EOPNOTSUPP;
 807
 808         memcpy(&prev_pp, pp, sizeof(*enic->pp));
 809         memset(pp, 0, sizeof(*enic->pp));
 810
 811         pp->set |= ENIC_SET_REQUEST;
 812         pp->request = nla_get_u8(port[IFLA_PORT_REQUEST]);
 813
 814         if (port[IFLA_PORT_PROFILE]) {
 815                 pp->set |= ENIC_SET_NAME;
 816                 memcpy(pp->name, nla_data(port[IFLA_PORT_PROFILE]),
 817                         PORT_PROFILE_MAX);
 818         }
 819
 820         if (port[IFLA_PORT_INSTANCE_UUID]) {
 821                 pp->set |= ENIC_SET_INSTANCE;
 822                 memcpy(pp->instance_uuid,
 823                         nla_data(port[IFLA_PORT_INSTANCE_UUID]), PORT_UUID_MAX);
 824         }
 825
 826         if (port[IFLA_PORT_HOST_UUID]) {
 827                 pp->set |= ENIC_SET_HOST;
 828                 memcpy(pp->host_uuid,
 829                         nla_data(port[IFLA_PORT_HOST_UUID]), PORT_UUID_MAX);
 830         }
 831
 832         if (vf == PORT_SELF_VF) {
 833                 /* Special case handling: mac came from IFLA_VF_MAC */
 834                 if (!is_zero_ether_addr(prev_pp.vf_mac))
 835                         memcpy(pp->mac_addr, prev_pp.vf_mac, ETH_ALEN);
 836
 837                 if (is_zero_ether_addr(netdev->dev_addr))
 838                         eth_hw_addr_random(netdev);
 839         } else {
 840                 /* SR-IOV VF: get mac from adapter */
 841                 ENIC_DEVCMD_PROXY_BY_INDEX(vf, err, enic,
 842                         vnic_dev_get_mac_addr, pp->mac_addr);
 843                 if (err) {
 844                         netdev_err(netdev, "Error getting mac for vf %d\n", vf);
 845                         memcpy(pp, &prev_pp, sizeof(*pp));
 846                         return enic_dev_status_to_errno(err);
 847                 }
 848         }
 849
 850         err = enic_process_set_pp_request(enic, vf, &prev_pp, &restore_pp);
 851         if (err) {
 852                 if (restore_pp) {
 853                         /* Things are still the way they were: Implicit
 854                          * DISASSOCIATE failed
 855                          */
 856                         memcpy(pp, &prev_pp, sizeof(*pp));
 857                 } else {
 858                         memset(pp, 0, sizeof(*pp));
 859                         if (vf == PORT_SELF_VF)
 860                                 memset(netdev->dev_addr, 0, ETH_ALEN);
 861                 }
 862         } else {
 863                 /* Set flag to indicate that the port assoc/disassoc
 864                  * request has been sent out to fw
 865                  */
 866                 pp->set |= ENIC_PORT_REQUEST_APPLIED;
 867
 868                 /* If DISASSOCIATE, clean up all assigned/saved macaddresses */
 869                 if (pp->request == PORT_REQUEST_DISASSOCIATE) {
 870                         memset(pp->mac_addr, 0, ETH_ALEN);
 871                         if (vf == PORT_SELF_VF)
 872                                 memset(netdev->dev_addr, 0, ETH_ALEN);
 873                 }
 874         }
 875
 876         if (vf == PORT_SELF_VF)
 877                 memset(pp->vf_mac, 0, ETH_ALEN);
 878
 879         return err;
 880 }
 881
 882 static int enic_get_vf_port(struct net_device *netdev, int vf,
 883         struct sk_buff *skb)
 884 {
 885         struct enic *enic = netdev_priv(netdev);
 886         u16 response = PORT_PROFILE_RESPONSE_SUCCESS;
 887         struct enic_port_profile *pp;
 888         int err;
 889
 890         ENIC_PP_BY_INDEX(enic, vf, pp, &err);
 891         if (err)
 892                 return err;
 893
 894         if (!(pp->set & ENIC_PORT_REQUEST_APPLIED))
 895                 return -ENODATA;
 896
 897         err = enic_process_get_pp_request(enic, vf, pp->request, &response);
 898         if (err)
 899                 return err;
 900
 901         if (nla_put_u16(skb, IFLA_PORT_REQUEST, pp->request) ||
 902             nla_put_u16(skb, IFLA_PORT_RESPONSE, response) ||
 903             ((pp->set & ENIC_SET_NAME) &&
 904              nla_put(skb, IFLA_PORT_PROFILE, PORT_PROFILE_MAX, pp->name)) ||
 905             ((pp->set & ENIC_SET_INSTANCE) &&
 906              nla_put(skb, IFLA_PORT_INSTANCE_UUID, PORT_UUID_MAX,
 907                      pp->instance_uuid)) ||
 908             ((pp->set & ENIC_SET_HOST) &&
 909              nla_put(skb, IFLA_PORT_HOST_UUID, PORT_UUID_MAX, pp->host_uuid)))
 910                 goto nla_put_failure;
 911         return 0;
 912
 913 nla_put_failure:
 914         return -EMSGSIZE;
 915 }
 916
 917 static void enic_free_rq_buf(struct vnic_rq *rq, struct vnic_rq_buf *buf)
 918 {
 919         struct enic *enic = vnic_dev_priv(rq->vdev);
 920
 921         if (!buf->os_buf)
 922                 return;
 923
 924         pci_unmap_single(enic->pdev, buf->dma_addr,
 925                 buf->len, PCI_DMA_FROMDEVICE);
 926         dev_kfree_skb_any(buf->os_buf);
 927 }
 928
 929 static int enic_rq_alloc_buf(struct vnic_rq *rq)
 930 {
 931         struct enic *enic = vnic_dev_priv(rq->vdev);
 932         struct net_device *netdev = enic->netdev;
 933         struct sk_buff *skb;
 934         unsigned int len = netdev->mtu + VLAN_ETH_HLEN;
 935         unsigned int os_buf_index = 0;
 936         dma_addr_t dma_addr;
 937
 938         skb = netdev_alloc_skb_ip_align(netdev, len);
 939         if (!skb)
 940                 return -ENOMEM;
 941
 942         dma_addr = pci_map_single(enic->pdev, skb->data,
 943                 len, PCI_DMA_FROMDEVICE);
 944
 945         enic_queue_rq_desc(rq, skb, os_buf_index,
 946                 dma_addr, len);
 947
 948         return 0;
 949 }
 950
 951 static void enic_intr_update_pkt_size(struct vnic_rx_bytes_counter *pkt_size,
 952                                       u32 pkt_len)
 953 {
 954         if (ENIC_LARGE_PKT_THRESHOLD <= pkt_len)
 955                 pkt_size->large_pkt_bytes_cnt += pkt_len;
 956         else
 957                 pkt_size->small_pkt_bytes_cnt += pkt_len;
 958 }
 959
 960 static void enic_rq_indicate_buf(struct vnic_rq *rq,
 961         struct cq_desc *cq_desc, struct vnic_rq_buf *buf,
 962         int skipped, void *opaque)
 963 {
 964         struct enic *enic = vnic_dev_priv(rq->vdev);
 965         struct net_device *netdev = enic->netdev;
 966         struct sk_buff *skb;
 967         struct vnic_cq *cq = &enic->cq[enic_cq_rq(enic, rq->index)];
 968
 969         u8 type, color, eop, sop, ingress_port, vlan_stripped;
 970         u8 fcoe, fcoe_sof, fcoe_fc_crc_ok, fcoe_enc_error, fcoe_eof;
 971         u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok;
 972         u8 ipv6, ipv4, ipv4_fragment, fcs_ok, rss_type, csum_not_calc;
 973         u8 packet_error;
 974         u16 q_number, completed_index, bytes_written, vlan_tci, checksum;
 975         u32 rss_hash;
 976
 977         if (skipped)
 978                 return;
 979
 980         skb = buf->os_buf;
 981         prefetch(skb->data - NET_IP_ALIGN);
 982         pci_unmap_single(enic->pdev, buf->dma_addr,
 983                 buf->len, PCI_DMA_FROMDEVICE);
 984
 985         cq_enet_rq_desc_dec((struct cq_enet_rq_desc *)cq_desc,
 986                 &type, &color, &q_number, &completed_index,
 987                 &ingress_port, &fcoe, &eop, &sop, &rss_type,
 988                 &csum_not_calc, &rss_hash, &bytes_written,
 989                 &packet_error, &vlan_stripped, &vlan_tci, &checksum,
 990                 &fcoe_sof, &fcoe_fc_crc_ok, &fcoe_enc_error,
 991                 &fcoe_eof, &tcp_udp_csum_ok, &udp, &tcp,
 992                 &ipv4_csum_ok, &ipv6, &ipv4, &ipv4_fragment,
 993                 &fcs_ok);
 994
 995         if (packet_error) {
 996
 997                 if (!fcs_ok) {
 998                         if (bytes_written > 0)
 999                                 enic->rq_bad_fcs++;
1000                         else if (bytes_written == 0)
1001                                 enic->rq_truncated_pkts++;
1002                 }
1003
1004                 dev_kfree_skb_any(skb);
1005
1006                 return;
1007         }
1008
1009         if (eop && bytes_written > 0) {
1010
1011                 /* Good receive
1012                  */
1013
1014                 skb_put(skb, bytes_written);
1015                 skb->protocol = eth_type_trans(skb, netdev);
1016                 skb_record_rx_queue(skb, q_number);
1017                 if (netdev->features & NETIF_F_RXHASH) {
1018                         skb_set_hash(skb, rss_hash,
1019                                      (rss_type &
1020                                       (NIC_CFG_RSS_HASH_TYPE_TCP_IPV6_EX |
1021                                        NIC_CFG_RSS_HASH_TYPE_TCP_IPV6 |
1022                                        NIC_CFG_RSS_HASH_TYPE_TCP_IPV4)) ?
1023                                      PKT_HASH_TYPE_L4 : PKT_HASH_TYPE_L3);
1024                 }
1025
1026                 if ((netdev->features & NETIF_F_RXCSUM) && !csum_not_calc) {
1027                         skb->csum = htons(checksum);
1028                         skb->ip_summed = CHECKSUM_COMPLETE;
1029                 }
1030
1031                 if (vlan_stripped)
1032                         __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan_tci);
1033
1034                 skb_mark_napi_id(skb, &enic->napi[rq->index]);
1035                 if (enic_poll_busy_polling(rq) ||
1036                     !(netdev->features & NETIF_F_GRO))
1037                         netif_receive_skb(skb);
1038                 else
1039                         napi_gro_receive(&enic->napi[q_number], skb);
1040                 if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce)
1041                         enic_intr_update_pkt_size(&cq->pkt_size_counter,
1042                                                   bytes_written);
1043         } else {
1044
1045                 /* Buffer overflow
1046                  */
1047
1048                 dev_kfree_skb_any(skb);
1049         }
1050 }
1051
1052 static int enic_rq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc,
1053         u8 type, u16 q_number, u16 completed_index, void *opaque)
1054 {
1055         struct enic *enic = vnic_dev_priv(vdev);
1056
1057         vnic_rq_service(&enic->rq[q_number], cq_desc,
1058                 completed_index, VNIC_RQ_RETURN_DESC,
1059                 enic_rq_indicate_buf, opaque);
1060
1061         return 0;
1062 }
1063
1064 static int enic_poll(struct napi_struct *napi, int budget)
1065 {
1066         struct net_device *netdev = napi->dev;
1067         struct enic *enic = netdev_priv(netdev);
1068         unsigned int cq_rq = enic_cq_rq(enic, 0);
1069         unsigned int cq_wq = enic_cq_wq(enic, 0);
1070         unsigned int intr = enic_legacy_io_intr();
1071         unsigned int rq_work_to_do = budget;
1072         unsigned int wq_work_to_do = -1; /* no limit */
1073         unsigned int  work_done, rq_work_done = 0, wq_work_done;
1074         int err;
1075
1076         wq_work_done = vnic_cq_service(&enic->cq[cq_wq], wq_work_to_do,
1077                                        enic_wq_service, NULL);
1078
1079         if (!enic_poll_lock_napi(&enic->rq[cq_rq])) {
1080                 if (wq_work_done > 0)
1081                         vnic_intr_return_credits(&enic->intr[intr],
1082                                                  wq_work_done,
1083                                                  0 /* dont unmask intr */,
1084                                                  0 /* dont reset intr timer */);
1085                 return rq_work_done;
1086         }
1087
1088         if (budget > 0)
1089                 rq_work_done = vnic_cq_service(&enic->cq[cq_rq],
1090                         rq_work_to_do, enic_rq_service, NULL);
1091
1092         /* Accumulate intr event credits for this polling
1093          * cycle.  An intr event is the completion of a
1094          * a WQ or RQ packet.
1095          */
1096
1097         work_done = rq_work_done + wq_work_done;
1098
1099         if (work_done > 0)
1100                 vnic_intr_return_credits(&enic->intr[intr],
1101                         work_done,
1102                         0 /* don't unmask intr */,
1103                         0 /* don't reset intr timer */);
1104
1105         err = vnic_rq_fill(&enic->rq[0], enic_rq_alloc_buf);
1106
1107         /* Buffer allocation failed. Stay in polling
1108          * mode so we can try to fill the ring again.
1109          */
1110
1111         if (err)
1112                 rq_work_done = rq_work_to_do;
1113
1114         if (rq_work_done < rq_work_to_do) {
1115
1116                 /* Some work done, but not enough to stay in polling,
1117                  * exit polling
1118                  */
1119
1120                 napi_complete(napi);
1121                 vnic_intr_unmask(&enic->intr[intr]);
1122         }
1123         enic_poll_unlock_napi(&enic->rq[cq_rq]);
1124
1125         return rq_work_done;
1126 }
1127
1128 static void enic_set_int_moderation(struct enic *enic, struct vnic_rq *rq)
1129 {
1130         unsigned int intr = enic_msix_rq_intr(enic, rq->index);
1131         struct vnic_cq *cq = &enic->cq[enic_cq_rq(enic, rq->index)];
1132         u32 timer = cq->tobe_rx_coal_timeval;
1133
1134         if (cq->tobe_rx_coal_timeval != cq->cur_rx_coal_timeval) {
1135                 vnic_intr_coalescing_timer_set(&enic->intr[intr], timer);
1136                 cq->cur_rx_coal_timeval = cq->tobe_rx_coal_timeval;
1137         }
1138 }
1139
1140 static void enic_calc_int_moderation(struct enic *enic, struct vnic_rq *rq)
1141 {
1142         struct enic_rx_coal *rx_coal = &enic->rx_coalesce_setting;
1143         struct vnic_cq *cq = &enic->cq[enic_cq_rq(enic, rq->index)];
1144         struct vnic_rx_bytes_counter *pkt_size_counter = &cq->pkt_size_counter;
1145         int index;
1146         u32 timer;
1147         u32 range_start;
1148         u32 traffic;
1149         u64 delta;
1150         ktime_t now = ktime_get();
1151
1152         delta = ktime_us_delta(now, cq->prev_ts);
1153         if (delta < ENIC_AIC_TS_BREAK)
1154                 return;
1155         cq->prev_ts = now;
1156
1157         traffic = pkt_size_counter->large_pkt_bytes_cnt +
1158                   pkt_size_counter->small_pkt_bytes_cnt;
1159         /* The table takes Mbps
1160          * traffic *= 8    => bits
1161          * traffic *= (10^6 / delta)    => bps
1162          * traffic /= 10^6     => Mbps
1163          *
1164          * Combining, traffic *= (8 / delta)
1165          */
1166
1167         traffic <<= 3;
1168         traffic = delta > UINT_MAX ? 0 : traffic / (u32)delta;
1169
1170         for (index = 0; index < ENIC_MAX_COALESCE_TIMERS; index++)
1171                 if (traffic < mod_table[index].rx_rate)
1172                         break;
1173         range_start = (pkt_size_counter->small_pkt_bytes_cnt >
1174                        pkt_size_counter->large_pkt_bytes_cnt << 1) ?
1175                       rx_coal->small_pkt_range_start :
1176                       rx_coal->large_pkt_range_start;
1177         timer = range_start + ((rx_coal->range_end - range_start) *
1178                                mod_table[index].range_percent / 100);
1179         /* Damping */
1180         cq->tobe_rx_coal_timeval = (timer + cq->tobe_rx_coal_timeval) >> 1;
1181
1182         pkt_size_counter->large_pkt_bytes_cnt = 0;
1183         pkt_size_counter->small_pkt_bytes_cnt = 0;
1184 }
1185
1186 #ifdef CONFIG_RFS_ACCEL
1187 static void enic_free_rx_cpu_rmap(struct enic *enic)
1188 {
1189         free_irq_cpu_rmap(enic->netdev->rx_cpu_rmap);
1190         enic->netdev->rx_cpu_rmap = NULL;
1191 }
1192
1193 static void enic_set_rx_cpu_rmap(struct enic *enic)
1194 {
1195         int i, res;
1196
1197         if (vnic_dev_get_intr_mode(enic->vdev) == VNIC_DEV_INTR_MODE_MSIX) {
1198                 enic->netdev->rx_cpu_rmap = alloc_irq_cpu_rmap(enic->rq_count);
1199                 if (unlikely(!enic->netdev->rx_cpu_rmap))
1200                         return;
1201                 for (i = 0; i < enic->rq_count; i++) {
1202                         res = irq_cpu_rmap_add(enic->netdev->rx_cpu_rmap,
1203                                                enic->msix_entry[i].vector);
1204                         if (unlikely(res)) {
1205                                 enic_free_rx_cpu_rmap(enic);
1206                                 return;
1207                         }
1208                 }
1209         }
1210 }
1211
1212 #else
1213
1214 static void enic_free_rx_cpu_rmap(struct enic *enic)
1215 {
1216 }
1217
1218 static void enic_set_rx_cpu_rmap(struct enic *enic)
1219 {
1220 }
1221
1222 #endif /* CONFIG_RFS_ACCEL */
1223
1224 #ifdef CONFIG_NET_RX_BUSY_POLL
1225 int enic_busy_poll(struct napi_struct *napi)
1226 {
1227         struct net_device *netdev = napi->dev;
1228         struct enic *enic = netdev_priv(netdev);
1229         unsigned int rq = (napi - &enic->napi[0]);
1230         unsigned int cq = enic_cq_rq(enic, rq);
1231         unsigned int intr = enic_msix_rq_intr(enic, rq);
1232         unsigned int work_to_do = -1; /* clean all pkts possible */
1233         unsigned int work_done;
1234
1235         if (!enic_poll_lock_poll(&enic->rq[rq]))
1236                 return LL_FLUSH_BUSY;
1237         work_done = vnic_cq_service(&enic->cq[cq], work_to_do,
1238                                     enic_rq_service, NULL);
1239
1240         if (work_done > 0)
1241                 vnic_intr_return_credits(&enic->intr[intr],
1242                                          work_done, 0, 0);
1243         vnic_rq_fill(&enic->rq[rq], enic_rq_alloc_buf);
1244         if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce)
1245                 enic_calc_int_moderation(enic, &enic->rq[rq]);
1246         enic_poll_unlock_poll(&enic->rq[rq]);
1247
1248         return work_done;
1249 }
1250 #endif /* CONFIG_NET_RX_BUSY_POLL */
1251
1252 static int enic_poll_msix_wq(struct napi_struct *napi, int budget)
1253 {
1254         struct net_device *netdev = napi->dev;
1255         struct enic *enic = netdev_priv(netdev);
1256         unsigned int wq_index = (napi - &enic->napi[0]) - enic->rq_count;
1257         struct vnic_wq *wq = &enic->wq[wq_index];
1258         unsigned int cq;
1259         unsigned int intr;
1260         unsigned int wq_work_to_do = -1; /* clean all desc possible */
1261         unsigned int wq_work_done;
1262         unsigned int wq_irq;
1263
1264         wq_irq = wq->index;
1265         cq = enic_cq_wq(enic, wq_irq);
1266         intr = enic_msix_wq_intr(enic, wq_irq);
1267         wq_work_done = vnic_cq_service(&enic->cq[cq], wq_work_to_do,
1268                                        enic_wq_service, NULL);
1269
1270         vnic_intr_return_credits(&enic->intr[intr], wq_work_done,
1271                                  0 /* don't unmask intr */,
1272                                  1 /* reset intr timer */);
1273         if (!wq_work_done) {
1274                 napi_complete(napi);
1275                 vnic_intr_unmask(&enic->intr[intr]);
1276         }
1277
1278         return 0;
1279 }
1280
1281 static int enic_poll_msix_rq(struct napi_struct *napi, int budget)
1282 {
1283         struct net_device *netdev = napi->dev;
1284         struct enic *enic = netdev_priv(netdev);
1285         unsigned int rq = (napi - &enic->napi[0]);
1286         unsigned int cq = enic_cq_rq(enic, rq);
1287         unsigned int intr = enic_msix_rq_intr(enic, rq);
1288         unsigned int work_to_do = budget;
1289         unsigned int work_done = 0;
1290         int err;
1291
1292         if (!enic_poll_lock_napi(&enic->rq[rq]))
1293                 return work_done;
1294         /* Service RQ
1295          */
1296
1297         if (budget > 0)
1298                 work_done = vnic_cq_service(&enic->cq[cq],
1299                         work_to_do, enic_rq_service, NULL);
1300
1301         /* Return intr event credits for this polling
1302          * cycle.  An intr event is the completion of a
1303          * RQ packet.
1304          */
1305
1306         if (work_done > 0)
1307                 vnic_intr_return_credits(&enic->intr[intr],
1308                         work_done,
1309                         0 /* don't unmask intr */,
1310                         0 /* don't reset intr timer */);
1311
1312         err = vnic_rq_fill(&enic->rq[rq], enic_rq_alloc_buf);
1313
1314         /* Buffer allocation failed. Stay in polling mode
1315          * so we can try to fill the ring again.
1316          */
1317
1318         if (err)
1319                 work_done = work_to_do;
1320         if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce)
1321                 /* Call the function which refreshes
1322                  * the intr coalescing timer value based on
1323                  * the traffic.  This is supported only in
1324                  * the case of MSI-x mode
1325                  */
1326                 enic_calc_int_moderation(enic, &enic->rq[rq]);
1327
1328         if (work_done < work_to_do) {
1329
1330                 /* Some work done, but not enough to stay in polling,
1331                  * exit polling
1332                  */
1333
1334                 napi_complete(napi);
1335                 if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce)
1336                         enic_set_int_moderation(enic, &enic->rq[rq]);
1337                 vnic_intr_unmask(&enic->intr[intr]);
1338         }
1339         enic_poll_unlock_napi(&enic->rq[rq]);
1340
1341         return work_done;
1342 }
1343
1344 static void enic_notify_timer(unsigned long data)
1345 {
1346         struct enic *enic = (struct enic *)data;
1347
1348         enic_notify_check(enic);
1349
1350         mod_timer(&enic->notify_timer,
1351                 round_jiffies(jiffies + ENIC_NOTIFY_TIMER_PERIOD));
1352 }
1353
1354 static void enic_free_intr(struct enic *enic)
1355 {
1356         struct net_device *netdev = enic->netdev;
1357         unsigned int i;
1358
1359         enic_free_rx_cpu_rmap(enic);
1360         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1361         case VNIC_DEV_INTR_MODE_INTX:
1362                 free_irq(enic->pdev->irq, netdev);
1363                 break;
1364         case VNIC_DEV_INTR_MODE_MSI:
1365                 free_irq(enic->pdev->irq, enic);
1366                 break;
1367         case VNIC_DEV_INTR_MODE_MSIX:
1368                 for (i = 0; i < ARRAY_SIZE(enic->msix); i++)
1369                         if (enic->msix[i].requested)
1370                                 free_irq(enic->msix_entry[i].vector,
1371                                         enic->msix[i].devid);
1372                 break;
1373         default:
1374                 break;
1375         }
1376 }
1377
1378 static int enic_request_intr(struct enic *enic)
1379 {
1380         struct net_device *netdev = enic->netdev;
1381         unsigned int i, intr;
1382         int err = 0;
1383
1384         enic_set_rx_cpu_rmap(enic);
1385         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1386
1387         case VNIC_DEV_INTR_MODE_INTX:
1388
1389                 err = request_irq(enic->pdev->irq, enic_isr_legacy,
1390                         IRQF_SHARED, netdev->name, netdev);
1391                 break;
1392
1393         case VNIC_DEV_INTR_MODE_MSI:
1394
1395                 err = request_irq(enic->pdev->irq, enic_isr_msi,
1396                         0, netdev->name, enic);
1397                 break;
1398
1399         case VNIC_DEV_INTR_MODE_MSIX:
1400
1401                 for (i = 0; i < enic->rq_count; i++) {
1402                         intr = enic_msix_rq_intr(enic, i);
1403                         snprintf(enic->msix[intr].devname,
1404                                 sizeof(enic->msix[intr].devname),
1405                                 "%.11s-rx-%d", netdev->name, i);
1406                         enic->msix[intr].isr = enic_isr_msix;
1407                         enic->msix[intr].devid = &enic->napi[i];
1408                 }
1409
1410                 for (i = 0; i < enic->wq_count; i++) {
1411                         int wq = enic_cq_wq(enic, i);
1412
1413                         intr = enic_msix_wq_intr(enic, i);
1414                         snprintf(enic->msix[intr].devname,
1415                                 sizeof(enic->msix[intr].devname),
1416                                 "%.11s-tx-%d", netdev->name, i);
1417                         enic->msix[intr].isr = enic_isr_msix;
1418                         enic->msix[intr].devid = &enic->napi[wq];
1419                 }
1420
1421                 intr = enic_msix_err_intr(enic);
1422                 snprintf(enic->msix[intr].devname,
1423                         sizeof(enic->msix[intr].devname),
1424                         "%.11s-err", netdev->name);
1425                 enic->msix[intr].isr = enic_isr_msix_err;
1426                 enic->msix[intr].devid = enic;
1427
1428                 intr = enic_msix_notify_intr(enic);
1429                 snprintf(enic->msix[intr].devname,
1430                         sizeof(enic->msix[intr].devname),
1431                         "%.11s-notify", netdev->name);
1432                 enic->msix[intr].isr = enic_isr_msix_notify;
1433                 enic->msix[intr].devid = enic;
1434
1435                 for (i = 0; i < ARRAY_SIZE(enic->msix); i++)
1436                         enic->msix[i].requested = 0;
1437
1438                 for (i = 0; i < enic->intr_count; i++) {
1439                         err = request_irq(enic->msix_entry[i].vector,
1440                                 enic->msix[i].isr, 0,
1441                                 enic->msix[i].devname,
1442                                 enic->msix[i].devid);
1443                         if (err) {
1444                                 enic_free_intr(enic);
1445                                 break;
1446                         }
1447                         enic->msix[i].requested = 1;
1448                 }
1449
1450                 break;
1451
1452         default:
1453                 break;
1454         }
1455
1456         return err;
1457 }
1458
1459 static void enic_synchronize_irqs(struct enic *enic)
1460 {
1461         unsigned int i;
1462
1463         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1464         case VNIC_DEV_INTR_MODE_INTX:
1465         case VNIC_DEV_INTR_MODE_MSI:
1466                 synchronize_irq(enic->pdev->irq);
1467                 break;
1468         case VNIC_DEV_INTR_MODE_MSIX:
1469                 for (i = 0; i < enic->intr_count; i++)
1470                         synchronize_irq(enic->msix_entry[i].vector);
1471                 break;
1472         default:
1473                 break;
1474         }
1475 }
1476
1477 static void enic_set_rx_coal_setting(struct enic *enic)
1478 {
1479         unsigned int speed;
1480         int index = -1;
1481         struct enic_rx_coal *rx_coal = &enic->rx_coalesce_setting;
1482
1483         /* If intr mode is not MSIX, do not do adaptive coalescing */
1484         if (VNIC_DEV_INTR_MODE_MSIX != vnic_dev_get_intr_mode(enic->vdev)) {
1485                 netdev_info(enic->netdev, "INTR mode is not MSIX, Not initializing adaptive coalescing");
1486                 return;
1487         }
1488
1489         /* 1. Read the link speed from fw
1490          * 2. Pick the default range for the speed
1491          * 3. Update it in enic->rx_coalesce_setting
1492          */
1493         speed = vnic_dev_port_speed(enic->vdev);
1494         if (ENIC_LINK_SPEED_10G < speed)
1495                 index = ENIC_LINK_40G_INDEX;
1496         else if (ENIC_LINK_SPEED_4G < speed)
1497                 index = ENIC_LINK_10G_INDEX;
1498         else
1499                 index = ENIC_LINK_4G_INDEX;
1500
1501         rx_coal->small_pkt_range_start = mod_range[index].small_pkt_range_start;
1502         rx_coal->large_pkt_range_start = mod_range[index].large_pkt_range_start;
1503         rx_coal->range_end = ENIC_RX_COALESCE_RANGE_END;
1504
1505         /* Start with the value provided by UCSM */
1506         for (index = 0; index < enic->rq_count; index++)
1507                 enic->cq[index].cur_rx_coal_timeval =
1508                                 enic->config.intr_timer_usec;
1509
1510         rx_coal->use_adaptive_rx_coalesce = 1;
1511 }
1512
1513 static int enic_dev_notify_set(struct enic *enic)
1514 {
1515         int err;
1516
1517         spin_lock_bh(&enic->devcmd_lock);
1518         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1519         case VNIC_DEV_INTR_MODE_INTX:
1520                 err = vnic_dev_notify_set(enic->vdev,
1521                         enic_legacy_notify_intr());
1522                 break;
1523         case VNIC_DEV_INTR_MODE_MSIX:
1524                 err = vnic_dev_notify_set(enic->vdev,
1525                         enic_msix_notify_intr(enic));
1526                 break;
1527         default:
1528                 err = vnic_dev_notify_set(enic->vdev, -1 /* no intr */);
1529                 break;
1530         }
1531         spin_unlock_bh(&enic->devcmd_lock);
1532
1533         return err;
1534 }
1535
1536 static void enic_notify_timer_start(struct enic *enic)
1537 {
1538         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1539         case VNIC_DEV_INTR_MODE_MSI:
1540                 mod_timer(&enic->notify_timer, jiffies);
1541                 break;
1542         default:
1543                 /* Using intr for notification for INTx/MSI-X */
1544                 break;
1545         }
1546 }
1547
1548 /* rtnl lock is held, process context */
1549 static int enic_open(struct net_device *netdev)
1550 {
1551         struct enic *enic = netdev_priv(netdev);
1552         unsigned int i;
1553         int err;
1554
1555         err = enic_request_intr(enic);
1556         if (err) {
1557                 netdev_err(netdev, "Unable to request irq.\n");
1558                 return err;
1559         }
1560
1561         err = enic_dev_notify_set(enic);
1562         if (err) {
1563                 netdev_err(netdev,
1564                         "Failed to alloc notify buffer, aborting.\n");
1565                 goto err_out_free_intr;
1566         }
1567
1568         for (i = 0; i < enic->rq_count; i++) {
1569                 vnic_rq_fill(&enic->rq[i], enic_rq_alloc_buf);
1570                 /* Need at least one buffer on ring to get going */
1571                 if (vnic_rq_desc_used(&enic->rq[i]) == 0) {
1572                         netdev_err(netdev, "Unable to alloc receive buffers\n");
1573                         err = -ENOMEM;
1574                         goto err_out_notify_unset;
1575                 }
1576         }
1577
1578         for (i = 0; i < enic->wq_count; i++)
1579                 vnic_wq_enable(&enic->wq[i]);
1580         for (i = 0; i < enic->rq_count; i++)
1581                 vnic_rq_enable(&enic->rq[i]);
1582
1583         if (!enic_is_dynamic(enic) && !enic_is_sriov_vf(enic))
1584                 enic_dev_add_station_addr(enic);
1585
1586         enic_set_rx_mode(netdev);
1587
1588         netif_tx_wake_all_queues(netdev);
1589
1590         for (i = 0; i < enic->rq_count; i++) {
1591                 enic_busy_poll_init_lock(&enic->rq[i]);
1592                 napi_enable(&enic->napi[i]);
1593         }
1594         if (vnic_dev_get_intr_mode(enic->vdev) == VNIC_DEV_INTR_MODE_MSIX)
1595                 for (i = 0; i < enic->wq_count; i++)
1596                         napi_enable(&enic->napi[enic_cq_wq(enic, i)]);
1597         enic_dev_enable(enic);
1598
1599         for (i = 0; i < enic->intr_count; i++)
1600                 vnic_intr_unmask(&enic->intr[i]);
1601
1602         enic_notify_timer_start(enic);
1603         enic_rfs_flw_tbl_init(enic);
1604
1605         return 0;
1606
1607 err_out_notify_unset:
1608         enic_dev_notify_unset(enic);
1609 err_out_free_intr:
1610         enic_free_intr(enic);
1611
1612         return err;
1613 }
1614
1615 /* rtnl lock is held, process context */
1616 static int enic_stop(struct net_device *netdev)
1617 {
1618         struct enic *enic = netdev_priv(netdev);
1619         unsigned int i;
1620         int err;
1621
1622         for (i = 0; i < enic->intr_count; i++) {
1623                 vnic_intr_mask(&enic->intr[i]);
1624                 (void)vnic_intr_masked(&enic->intr[i]); /* flush write */
1625         }
1626
1627         enic_synchronize_irqs(enic);
1628
1629         del_timer_sync(&enic->notify_timer);
1630         enic_rfs_flw_tbl_free(enic);
1631
1632         enic_dev_disable(enic);
1633
1634         local_bh_disable();
1635         for (i = 0; i < enic->rq_count; i++) {
1636                 napi_disable(&enic->napi[i]);
1637                 while (!enic_poll_lock_napi(&enic->rq[i]))
1638                         mdelay(1);
1639         }
1640         local_bh_enable();
1641
1642         netif_carrier_off(netdev);
1643         netif_tx_disable(netdev);
1644         if (vnic_dev_get_intr_mode(enic->vdev) == VNIC_DEV_INTR_MODE_MSIX)
1645                 for (i = 0; i < enic->wq_count; i++)
1646                         napi_disable(&enic->napi[enic_cq_wq(enic, i)]);
1647
1648         if (!enic_is_dynamic(enic) && !enic_is_sriov_vf(enic))
1649                 enic_dev_del_station_addr(enic);
1650
1651         for (i = 0; i < enic->wq_count; i++) {
1652                 err = vnic_wq_disable(&enic->wq[i]);
1653                 if (err)
1654                         return err;
1655         }
1656         for (i = 0; i < enic->rq_count; i++) {
1657                 err = vnic_rq_disable(&enic->rq[i]);
1658                 if (err)
1659                         return err;
1660         }
1661
1662         enic_dev_notify_unset(enic);
1663         enic_free_intr(enic);
1664
1665         for (i = 0; i < enic->wq_count; i++)
1666                 vnic_wq_clean(&enic->wq[i], enic_free_wq_buf);
1667         for (i = 0; i < enic->rq_count; i++)
1668                 vnic_rq_clean(&enic->rq[i], enic_free_rq_buf);
1669         for (i = 0; i < enic->cq_count; i++)
1670                 vnic_cq_clean(&enic->cq[i]);
1671         for (i = 0; i < enic->intr_count; i++)
1672                 vnic_intr_clean(&enic->intr[i]);
1673
1674         return 0;
1675 }
1676
1677 static int enic_change_mtu(struct net_device *netdev, int new_mtu)
1678 {
1679         struct enic *enic = netdev_priv(netdev);
1680         int running = netif_running(netdev);
1681
1682         if (new_mtu < ENIC_MIN_MTU || new_mtu > ENIC_MAX_MTU)
1683                 return -EINVAL;
1684
1685         if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic))
1686                 return -EOPNOTSUPP;
1687
1688         if (running)
1689                 enic_stop(netdev);
1690
1691         netdev->mtu = new_mtu;
1692
1693         if (netdev->mtu > enic->port_mtu)
1694                 netdev_warn(netdev,
1695                         "interface MTU (%d) set higher than port MTU (%d)\n",
1696                         netdev->mtu, enic->port_mtu);
1697
1698         if (running)
1699                 enic_open(netdev);
1700
1701         return 0;
1702 }
1703
1704 static void enic_change_mtu_work(struct work_struct *work)
1705 {
1706         struct enic *enic = container_of(work, struct enic, change_mtu_work);
1707         struct net_device *netdev = enic->netdev;
1708         int new_mtu = vnic_dev_mtu(enic->vdev);
1709         int err;
1710         unsigned int i;
1711
1712         new_mtu = max_t(int, ENIC_MIN_MTU, min_t(int, ENIC_MAX_MTU, new_mtu));
1713
1714         rtnl_lock();
1715
1716         /* Stop RQ */
1717         del_timer_sync(&enic->notify_timer);
1718
1719         for (i = 0; i < enic->rq_count; i++)
1720                 napi_disable(&enic->napi[i]);
1721
1722         vnic_intr_mask(&enic->intr[0]);
1723         enic_synchronize_irqs(enic);
1724         err = vnic_rq_disable(&enic->rq[0]);
1725         if (err) {
1726                 rtnl_unlock();
1727                 netdev_err(netdev, "Unable to disable RQ.\n");
1728                 return;
1729         }
1730         vnic_rq_clean(&enic->rq[0], enic_free_rq_buf);
1731         vnic_cq_clean(&enic->cq[0]);
1732         vnic_intr_clean(&enic->intr[0]);
1733
1734         /* Fill RQ with new_mtu-sized buffers */
1735         netdev->mtu = new_mtu;
1736         vnic_rq_fill(&enic->rq[0], enic_rq_alloc_buf);
1737         /* Need at least one buffer on ring to get going */
1738         if (vnic_rq_desc_used(&enic->rq[0]) == 0) {
1739                 rtnl_unlock();
1740                 netdev_err(netdev, "Unable to alloc receive buffers.\n");
1741                 return;
1742         }
1743
1744         /* Start RQ */
1745         vnic_rq_enable(&enic->rq[0]);
1746         napi_enable(&enic->napi[0]);
1747         vnic_intr_unmask(&enic->intr[0]);
1748         enic_notify_timer_start(enic);
1749
1750         rtnl_unlock();
1751
1752         netdev_info(netdev, "interface MTU set as %d\n", netdev->mtu);
1753 }
1754
1755 #ifdef CONFIG_NET_POLL_CONTROLLER
1756 static void enic_poll_controller(struct net_device *netdev)
1757 {
1758         struct enic *enic = netdev_priv(netdev);
1759         struct vnic_dev *vdev = enic->vdev;
1760         unsigned int i, intr;
1761
1762         switch (vnic_dev_get_intr_mode(vdev)) {
1763         case VNIC_DEV_INTR_MODE_MSIX:
1764                 for (i = 0; i < enic->rq_count; i++) {
1765                         intr = enic_msix_rq_intr(enic, i);
1766                         enic_isr_msix(enic->msix_entry[intr].vector,
1767                                       &enic->napi[i]);
1768                 }
1769
1770                 for (i = 0; i < enic->wq_count; i++) {
1771                         intr = enic_msix_wq_intr(enic, i);
1772                         enic_isr_msix(enic->msix_entry[intr].vector,
1773                                       &enic->napi[enic_cq_wq(enic, i)]);
1774                 }
1775
1776                 break;
1777         case VNIC_DEV_INTR_MODE_MSI:
1778                 enic_isr_msi(enic->pdev->irq, enic);
1779                 break;
1780         case VNIC_DEV_INTR_MODE_INTX:
1781                 enic_isr_legacy(enic->pdev->irq, netdev);
1782                 break;
1783         default:
1784                 break;
1785         }
1786 }
1787 #endif
1788
1789 static int enic_dev_wait(struct vnic_dev *vdev,
1790         int (*start)(struct vnic_dev *, int),
1791         int (*finished)(struct vnic_dev *, int *),
1792         int arg)
1793 {
1794         unsigned long time;
1795         int done;
1796         int err;
1797
1798         BUG_ON(in_interrupt());
1799
1800         err = start(vdev, arg);
1801         if (err)
1802                 return err;
1803
1804         /* Wait for func to complete...2 seconds max
1805          */
1806
1807         time = jiffies + (HZ * 2);
1808         do {
1809
1810                 err = finished(vdev, &done);
1811                 if (err)
1812                         return err;
1813
1814                 if (done)
1815                         return 0;
1816
1817                 schedule_timeout_uninterruptible(HZ / 10);
1818
1819         } while (time_after(time, jiffies));
1820
1821         return -ETIMEDOUT;
1822 }
1823
1824 static int enic_dev_open(struct enic *enic)
1825 {
1826         int err;
1827
1828         err = enic_dev_wait(enic->vdev, vnic_dev_open,
1829                 vnic_dev_open_done, 0);
1830         if (err)
1831                 dev_err(enic_get_dev(enic), "vNIC device open failed, err %d\n",
1832                         err);
1833
1834         return err;
1835 }
1836
1837 static int enic_dev_hang_reset(struct enic *enic)
1838 {
1839         int err;
1840
1841         err = enic_dev_wait(enic->vdev, vnic_dev_hang_reset,
1842                 vnic_dev_hang_reset_done, 0);
1843         if (err)
1844                 netdev_err(enic->netdev, "vNIC hang reset failed, err %d\n",
1845                         err);
1846
1847         return err;
1848 }
1849
1850 static int enic_set_rsskey(struct enic *enic)
1851 {
1852         dma_addr_t rss_key_buf_pa;
1853         union vnic_rss_key *rss_key_buf_va = NULL;
1854         union vnic_rss_key rss_key = {
1855                 .key[0].b = {85, 67, 83, 97, 119, 101, 115, 111, 109, 101},
1856                 .key[1].b = {80, 65, 76, 79, 117, 110, 105, 113, 117, 101},
1857                 .key[2].b = {76, 73, 78, 85, 88, 114, 111, 99, 107, 115},
1858                 .key[3].b = {69, 78, 73, 67, 105, 115, 99, 111, 111, 108},
1859         };
1860         int err;
1861
1862         rss_key_buf_va = pci_alloc_consistent(enic->pdev,
1863                 sizeof(union vnic_rss_key), &rss_key_buf_pa);
1864         if (!rss_key_buf_va)
1865                 return -ENOMEM;
1866
1867         memcpy(rss_key_buf_va, &rss_key, sizeof(union vnic_rss_key));
1868
1869         spin_lock_bh(&enic->devcmd_lock);
1870         err = enic_set_rss_key(enic,
1871                 rss_key_buf_pa,
1872                 sizeof(union vnic_rss_key));
1873         spin_unlock_bh(&enic->devcmd_lock);
1874
1875         pci_free_consistent(enic->pdev, sizeof(union vnic_rss_key),
1876                 rss_key_buf_va, rss_key_buf_pa);
1877
1878         return err;
1879 }
1880
1881 static int enic_set_rsscpu(struct enic *enic, u8 rss_hash_bits)
1882 {
1883         dma_addr_t rss_cpu_buf_pa;
1884         union vnic_rss_cpu *rss_cpu_buf_va = NULL;
1885         unsigned int i;
1886         int err;
1887
1888         rss_cpu_buf_va = pci_alloc_consistent(enic->pdev,
1889                 sizeof(union vnic_rss_cpu), &rss_cpu_buf_pa);
1890         if (!rss_cpu_buf_va)
1891                 return -ENOMEM;
1892
1893         for (i = 0; i < (1 << rss_hash_bits); i++)
1894                 (*rss_cpu_buf_va).cpu[i/4].b[i%4] = i % enic->rq_count;
1895
1896         spin_lock_bh(&enic->devcmd_lock);
1897         err = enic_set_rss_cpu(enic,
1898                 rss_cpu_buf_pa,
1899                 sizeof(union vnic_rss_cpu));
1900         spin_unlock_bh(&enic->devcmd_lock);
1901
1902         pci_free_consistent(enic->pdev, sizeof(union vnic_rss_cpu),
1903                 rss_cpu_buf_va, rss_cpu_buf_pa);
1904
1905         return err;
1906 }
1907
1908 static int enic_set_niccfg(struct enic *enic, u8 rss_default_cpu,
1909         u8 rss_hash_type, u8 rss_hash_bits, u8 rss_base_cpu, u8 rss_enable)
1910 {
1911         const u8 tso_ipid_split_en = 0;
1912         const u8 ig_vlan_strip_en = 1;
1913         int err;
1914
1915         /* Enable VLAN tag stripping.
1916         */
1917
1918         spin_lock_bh(&enic->devcmd_lock);
1919         err = enic_set_nic_cfg(enic,
1920                 rss_default_cpu, rss_hash_type,
1921                 rss_hash_bits, rss_base_cpu,
1922                 rss_enable, tso_ipid_split_en,
1923                 ig_vlan_strip_en);
1924         spin_unlock_bh(&enic->devcmd_lock);
1925
1926         return err;
1927 }
1928
1929 static int enic_set_rss_nic_cfg(struct enic *enic)
1930 {
1931         struct device *dev = enic_get_dev(enic);
1932         const u8 rss_default_cpu = 0;
1933         const u8 rss_hash_type = NIC_CFG_RSS_HASH_TYPE_IPV4 |
1934                 NIC_CFG_RSS_HASH_TYPE_TCP_IPV4 |
1935                 NIC_CFG_RSS_HASH_TYPE_IPV6 |
1936                 NIC_CFG_RSS_HASH_TYPE_TCP_IPV6;
1937         const u8 rss_hash_bits = 7;
1938         const u8 rss_base_cpu = 0;
1939         u8 rss_enable = ENIC_SETTING(enic, RSS) && (enic->rq_count > 1);
1940
1941         if (rss_enable) {
1942                 if (!enic_set_rsskey(enic)) {
1943                         if (enic_set_rsscpu(enic, rss_hash_bits)) {
1944                                 rss_enable = 0;
1945                                 dev_warn(dev, "RSS disabled, "
1946                                         "Failed to set RSS cpu indirection table.");
1947                         }
1948                 } else {
1949                         rss_enable = 0;
1950                         dev_warn(dev, "RSS disabled, Failed to set RSS key.\n");
1951                 }
1952         }
1953
1954         return enic_set_niccfg(enic, rss_default_cpu, rss_hash_type,
1955                 rss_hash_bits, rss_base_cpu, rss_enable);
1956 }
1957
1958 static void enic_reset(struct work_struct *work)
1959 {
1960         struct enic *enic = container_of(work, struct enic, reset);
1961
1962         if (!netif_running(enic->netdev))
1963                 return;
1964
1965         rtnl_lock();
1966
1967         spin_lock(&enic->enic_api_lock);
1968         enic_dev_hang_notify(enic);
1969         enic_stop(enic->netdev);
1970         enic_dev_hang_reset(enic);
1971         enic_reset_addr_lists(enic);
1972         enic_init_vnic_resources(enic);
1973         enic_set_rss_nic_cfg(enic);
1974         enic_dev_set_ig_vlan_rewrite_mode(enic);
1975         enic_open(enic->netdev);
1976         spin_unlock(&enic->enic_api_lock);
1977         call_netdevice_notifiers(NETDEV_REBOOT, enic->netdev);
1978
1979         rtnl_unlock();
1980 }
1981
1982 static int enic_set_intr_mode(struct enic *enic)
1983 {
1984         unsigned int n = min_t(unsigned int, enic->rq_count, ENIC_RQ_MAX);
1985         unsigned int m = min_t(unsigned int, enic->wq_count, ENIC_WQ_MAX);
1986         unsigned int i;
1987
1988         /* Set interrupt mode (INTx, MSI, MSI-X) depending
1989          * on system capabilities.
1990          *
1991          * Try MSI-X first
1992          *
1993          * We need n RQs, m WQs, n+m CQs, and n+m+2 INTRs
1994          * (the second to last INTR is used for WQ/RQ errors)
1995          * (the last INTR is used for notifications)
1996          */
1997
1998         BUG_ON(ARRAY_SIZE(enic->msix_entry) < n + m + 2);
1999         for (i = 0; i < n + m + 2; i++)
2000                 enic->msix_entry[i].entry = i;
2001
2002         /* Use multiple RQs if RSS is enabled
2003          */
2004
2005         if (ENIC_SETTING(enic, RSS) &&
2006             enic->config.intr_mode < 1 &&
2007             enic->rq_count >= n &&
2008             enic->wq_count >= m &&
2009             enic->cq_count >= n + m &&
2010             enic->intr_count >= n + m + 2) {
2011
2012                 if (pci_enable_msix_range(enic->pdev, enic->msix_entry,
2013                                           n + m + 2, n + m + 2) > 0) {
2014
2015                         enic->rq_count = n;
2016                         enic->wq_count = m;
2017                         enic->cq_count = n + m;
2018                         enic->intr_count = n + m + 2;
2019
2020                         vnic_dev_set_intr_mode(enic->vdev,
2021                                 VNIC_DEV_INTR_MODE_MSIX);
2022
2023                         return 0;
2024                 }
2025         }
2026
2027         if (enic->config.intr_mode < 1 &&
2028             enic->rq_count >= 1 &&
2029             enic->wq_count >= m &&
2030             enic->cq_count >= 1 + m &&
2031             enic->intr_count >= 1 + m + 2) {
2032                 if (pci_enable_msix_range(enic->pdev, enic->msix_entry,
2033                                           1 + m + 2, 1 + m + 2) > 0) {
2034
2035                         enic->rq_count = 1;
2036                         enic->wq_count = m;
2037                         enic->cq_count = 1 + m;
2038                         enic->intr_count = 1 + m + 2;
2039
2040                         vnic_dev_set_intr_mode(enic->vdev,
2041                                 VNIC_DEV_INTR_MODE_MSIX);
2042
2043                         return 0;
2044                 }
2045         }
2046
2047         /* Next try MSI
2048          *
2049          * We need 1 RQ, 1 WQ, 2 CQs, and 1 INTR
2050          */
2051
2052         if (enic->config.intr_mode < 2 &&
2053             enic->rq_count >= 1 &&
2054             enic->wq_count >= 1 &&
2055             enic->cq_count >= 2 &&
2056             enic->intr_count >= 1 &&
2057             !pci_enable_msi(enic->pdev)) {
2058
2059                 enic->rq_count = 1;
2060                 enic->wq_count = 1;
2061                 enic->cq_count = 2;
2062                 enic->intr_count = 1;
2063
2064                 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_MSI);
2065
2066                 return 0;
2067         }
2068
2069         /* Next try INTx
2070          *
2071          * We need 1 RQ, 1 WQ, 2 CQs, and 3 INTRs
2072          * (the first INTR is used for WQ/RQ)
2073          * (the second INTR is used for WQ/RQ errors)
2074          * (the last INTR is used for notifications)
2075          */
2076
2077         if (enic->config.intr_mode < 3 &&
2078             enic->rq_count >= 1 &&
2079             enic->wq_count >= 1 &&
2080             enic->cq_count >= 2 &&
2081             enic->intr_count >= 3) {
2082
2083                 enic->rq_count = 1;
2084                 enic->wq_count = 1;
2085                 enic->cq_count = 2;
2086                 enic->intr_count = 3;
2087
2088                 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_INTX);
2089
2090                 return 0;
2091         }
2092
2093         vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN);
2094
2095         return -EINVAL;
2096 }
2097
2098 static void enic_clear_intr_mode(struct enic *enic)
2099 {
2100         switch (vnic_dev_get_intr_mode(enic->vdev)) {
2101         case VNIC_DEV_INTR_MODE_MSIX:
2102                 pci_disable_msix(enic->pdev);
2103                 break;
2104         case VNIC_DEV_INTR_MODE_MSI:
2105                 pci_disable_msi(enic->pdev);
2106                 break;
2107         default:
2108                 break;
2109         }
2110
2111         vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN);
2112 }
2113
2114 static const struct net_device_ops enic_netdev_dynamic_ops = {
2115         .ndo_open               = enic_open,
2116         .ndo_stop               = enic_stop,
2117         .ndo_start_xmit         = enic_hard_start_xmit,
2118         .ndo_get_stats64        = enic_get_stats,
2119         .ndo_validate_addr      = eth_validate_addr,
2120         .ndo_set_rx_mode        = enic_set_rx_mode,
2121         .ndo_set_mac_address    = enic_set_mac_address_dynamic,
2122         .ndo_change_mtu         = enic_change_mtu,
2123         .ndo_vlan_rx_add_vid    = enic_vlan_rx_add_vid,
2124         .ndo_vlan_rx_kill_vid   = enic_vlan_rx_kill_vid,
2125         .ndo_tx_timeout         = enic_tx_timeout,
2126         .ndo_set_vf_port        = enic_set_vf_port,
2127         .ndo_get_vf_port        = enic_get_vf_port,
2128         .ndo_set_vf_mac         = enic_set_vf_mac,
2129 #ifdef CONFIG_NET_POLL_CONTROLLER
2130         .ndo_poll_controller    = enic_poll_controller,
2131 #endif
2132 #ifdef CONFIG_RFS_ACCEL
2133         .ndo_rx_flow_steer      = enic_rx_flow_steer,
2134 #endif
2135 #ifdef CONFIG_NET_RX_BUSY_POLL
2136         .ndo_busy_poll          = enic_busy_poll,
2137 #endif
2138 };
2139
2140 static const struct net_device_ops enic_netdev_ops = {
2141         .ndo_open               = enic_open,
2142         .ndo_stop               = enic_stop,
2143         .ndo_start_xmit         = enic_hard_start_xmit,
2144         .ndo_get_stats64        = enic_get_stats,
2145         .ndo_validate_addr      = eth_validate_addr,
2146         .ndo_set_mac_address    = enic_set_mac_address,
2147         .ndo_set_rx_mode        = enic_set_rx_mode,
2148         .ndo_change_mtu         = enic_change_mtu,
2149         .ndo_vlan_rx_add_vid    = enic_vlan_rx_add_vid,
2150         .ndo_vlan_rx_kill_vid   = enic_vlan_rx_kill_vid,
2151         .ndo_tx_timeout         = enic_tx_timeout,
2152         .ndo_set_vf_port        = enic_set_vf_port,
2153         .ndo_get_vf_port        = enic_get_vf_port,
2154         .ndo_set_vf_mac         = enic_set_vf_mac,
2155 #ifdef CONFIG_NET_POLL_CONTROLLER
2156         .ndo_poll_controller    = enic_poll_controller,
2157 #endif
2158 #ifdef CONFIG_RFS_ACCEL
2159         .ndo_rx_flow_steer      = enic_rx_flow_steer,
2160 #endif
2161 #ifdef CONFIG_NET_RX_BUSY_POLL
2162         .ndo_busy_poll          = enic_busy_poll,
2163 #endif
2164 };
2165
2166 static void enic_dev_deinit(struct enic *enic)
2167 {
2168         unsigned int i;
2169
2170         for (i = 0; i < enic->rq_count; i++) {
2171                 napi_hash_del(&enic->napi[i]);
2172                 netif_napi_del(&enic->napi[i]);
2173         }
2174         if (vnic_dev_get_intr_mode(enic->vdev) == VNIC_DEV_INTR_MODE_MSIX)
2175                 for (i = 0; i < enic->wq_count; i++)
2176                         netif_napi_del(&enic->napi[enic_cq_wq(enic, i)]);
2177
2178         enic_free_vnic_resources(enic);
2179         enic_clear_intr_mode(enic);
2180 }
2181
2182 static int enic_dev_init(struct enic *enic)
2183 {
2184         struct device *dev = enic_get_dev(enic);
2185         struct net_device *netdev = enic->netdev;
2186         unsigned int i;
2187         int err;
2188
2189         /* Get interrupt coalesce timer info */
2190         err = enic_dev_intr_coal_timer_info(enic);
2191         if (err) {
2192                 dev_warn(dev, "Using default conversion factor for "
2193                         "interrupt coalesce timer\n");
2194                 vnic_dev_intr_coal_timer_info_default(enic->vdev);
2195         }
2196
2197         /* Get vNIC configuration
2198          */
2199
2200         err = enic_get_vnic_config(enic);
2201         if (err) {
2202                 dev_err(dev, "Get vNIC configuration failed, aborting\n");
2203                 return err;
2204         }
2205
2206         /* Get available resource counts
2207          */
2208
2209         enic_get_res_counts(enic);
2210
2211         /* Set interrupt mode based on resource counts and system
2212          * capabilities
2213          */
2214
2215         err = enic_set_intr_mode(enic);
2216         if (err) {
2217                 dev_err(dev, "Failed to set intr mode based on resource "
2218                         "counts and system capabilities, aborting\n");
2219                 return err;
2220         }
2221
2222         /* Allocate and configure vNIC resources
2223          */
2224
2225         err = enic_alloc_vnic_resources(enic);
2226         if (err) {
2227                 dev_err(dev, "Failed to alloc vNIC resources, aborting\n");
2228                 goto err_out_free_vnic_resources;
2229         }
2230
2231         enic_init_vnic_resources(enic);
2232
2233         err = enic_set_rss_nic_cfg(enic);
2234         if (err) {
2235                 dev_err(dev, "Failed to config nic, aborting\n");
2236                 goto err_out_free_vnic_resources;
2237         }
2238
2239         switch (vnic_dev_get_intr_mode(enic->vdev)) {
2240         default:
2241                 netif_napi_add(netdev, &enic->napi[0], enic_poll, 64);
2242                 napi_hash_add(&enic->napi[0]);
2243                 break;
2244         case VNIC_DEV_INTR_MODE_MSIX:
2245                 for (i = 0; i < enic->rq_count; i++) {
2246                         netif_napi_add(netdev, &enic->napi[i],
2247                                 enic_poll_msix_rq, NAPI_POLL_WEIGHT);
2248                         napi_hash_add(&enic->napi[i]);
2249                 }
2250                 for (i = 0; i < enic->wq_count; i++)
2251                         netif_napi_add(netdev, &enic->napi[enic_cq_wq(enic, i)],
2252                                        enic_poll_msix_wq, NAPI_POLL_WEIGHT);
2253                 break;
2254         }
2255
2256         return 0;
2257
2258 err_out_free_vnic_resources:
2259         enic_clear_intr_mode(enic);
2260         enic_free_vnic_resources(enic);
2261
2262         return err;
2263 }
2264
2265 static void enic_iounmap(struct enic *enic)
2266 {
2267         unsigned int i;
2268
2269         for (i = 0; i < ARRAY_SIZE(enic->bar); i++)
2270                 if (enic->bar[i].vaddr)
2271                         iounmap(enic->bar[i].vaddr);
2272 }
2273
2274 static int enic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2275 {
2276         struct device *dev = &pdev->dev;
2277         struct net_device *netdev;
2278         struct enic *enic;
2279         int using_dac = 0;
2280         unsigned int i;
2281         int err;
2282 #ifdef CONFIG_PCI_IOV
2283         int pos = 0;
2284 #endif
2285         int num_pps = 1;
2286
2287         /* Allocate net device structure and initialize.  Private
2288          * instance data is initialized to zero.
2289          */
2290
2291         netdev = alloc_etherdev_mqs(sizeof(struct enic),
2292                                     ENIC_RQ_MAX, ENIC_WQ_MAX);
2293         if (!netdev)
2294                 return -ENOMEM;
2295
2296         pci_set_drvdata(pdev, netdev);
2297
2298         SET_NETDEV_DEV(netdev, &pdev->dev);
2299
2300         enic = netdev_priv(netdev);
2301         enic->netdev = netdev;
2302         enic->pdev = pdev;
2303
2304         /* Setup PCI resources
2305          */
2306
2307         err = pci_enable_device_mem(pdev);
2308         if (err) {
2309                 dev_err(dev, "Cannot enable PCI device, aborting\n");
2310                 goto err_out_free_netdev;
2311         }
2312
2313         err = pci_request_regions(pdev, DRV_NAME);
2314         if (err) {
2315                 dev_err(dev, "Cannot request PCI regions, aborting\n");
2316                 goto err_out_disable_device;
2317         }
2318
2319         pci_set_master(pdev);
2320
2321         /* Query PCI controller on system for DMA addressing
2322          * limitation for the device.  Try 64-bit first, and
2323          * fail to 32-bit.
2324          */
2325
2326         err = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
2327         if (err) {
2328                 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
2329                 if (err) {
2330                         dev_err(dev, "No usable DMA configuration, aborting\n");
2331                         goto err_out_release_regions;
2332                 }
2333                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
2334                 if (err) {
2335                         dev_err(dev, "Unable to obtain %u-bit DMA "
2336                                 "for consistent allocations, aborting\n", 32);
2337                         goto err_out_release_regions;
2338                 }
2339         } else {
2340                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
2341                 if (err) {
2342                         dev_err(dev, "Unable to obtain %u-bit DMA "
2343                                 "for consistent allocations, aborting\n", 64);
2344                         goto err_out_release_regions;
2345                 }
2346                 using_dac = 1;
2347         }
2348
2349         /* Map vNIC resources from BAR0-5
2350          */
2351
2352         for (i = 0; i < ARRAY_SIZE(enic->bar); i++) {
2353                 if (!(pci_resource_flags(pdev, i) & IORESOURCE_MEM))
2354                         continue;
2355                 enic->bar[i].len = pci_resource_len(pdev, i);
2356                 enic->bar[i].vaddr = pci_iomap(pdev, i, enic->bar[i].len);
2357                 if (!enic->bar[i].vaddr) {
2358                         dev_err(dev, "Cannot memory-map BAR %d, aborting\n", i);
2359                         err = -ENODEV;
2360                         goto err_out_iounmap;
2361                 }
2362                 enic->bar[i].bus_addr = pci_resource_start(pdev, i);
2363         }
2364
2365         /* Register vNIC device
2366          */
2367
2368         enic->vdev = vnic_dev_register(NULL, enic, pdev, enic->bar,
2369                 ARRAY_SIZE(enic->bar));
2370         if (!enic->vdev) {
2371                 dev_err(dev, "vNIC registration failed, aborting\n");
2372                 err = -ENODEV;
2373                 goto err_out_iounmap;
2374         }
2375
2376 #ifdef CONFIG_PCI_IOV
2377         /* Get number of subvnics */
2378         pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_SRIOV);
2379         if (pos) {
2380                 pci_read_config_word(pdev, pos + PCI_SRIOV_TOTAL_VF,
2381                         &enic->num_vfs);
2382                 if (enic->num_vfs) {
2383                         err = pci_enable_sriov(pdev, enic->num_vfs);
2384                         if (err) {
2385                                 dev_err(dev, "SRIOV enable failed, aborting."
2386                                         " pci_enable_sriov() returned %d\n",
2387                                         err);
2388                                 goto err_out_vnic_unregister;
2389                         }
2390                         enic->priv_flags |= ENIC_SRIOV_ENABLED;
2391                         num_pps = enic->num_vfs;
2392                 }
2393         }
2394 #endif
2395
2396         /* Allocate structure for port profiles */
2397         enic->pp = kcalloc(num_pps, sizeof(*enic->pp), GFP_KERNEL);
2398         if (!enic->pp) {
2399                 err = -ENOMEM;
2400                 goto err_out_disable_sriov_pp;
2401         }
2402
2403         /* Issue device open to get device in known state
2404          */
2405
2406         err = enic_dev_open(enic);
2407         if (err) {
2408                 dev_err(dev, "vNIC dev open failed, aborting\n");
2409                 goto err_out_disable_sriov;
2410         }
2411
2412         /* Setup devcmd lock
2413          */
2414
2415         spin_lock_init(&enic->devcmd_lock);
2416         spin_lock_init(&enic->enic_api_lock);
2417
2418         /*
2419          * Set ingress vlan rewrite mode before vnic initialization
2420          */
2421
2422         err = enic_dev_set_ig_vlan_rewrite_mode(enic);
2423         if (err) {
2424                 dev_err(dev,
2425                         "Failed to set ingress vlan rewrite mode, aborting.\n");
2426                 goto err_out_dev_close;
2427         }
2428
2429         /* Issue device init to initialize the vnic-to-switch link.
2430          * We'll start with carrier off and wait for link UP
2431          * notification later to turn on carrier.  We don't need
2432          * to wait here for the vnic-to-switch link initialization
2433          * to complete; link UP notification is the indication that
2434          * the process is complete.
2435          */
2436
2437         netif_carrier_off(netdev);
2438
2439         /* Do not call dev_init for a dynamic vnic.
2440          * For a dynamic vnic, init_prov_info will be
2441          * called later by an upper layer.
2442          */
2443
2444         if (!enic_is_dynamic(enic)) {
2445                 err = vnic_dev_init(enic->vdev, 0);
2446                 if (err) {
2447                         dev_err(dev, "vNIC dev init failed, aborting\n");
2448                         goto err_out_dev_close;
2449                 }
2450         }
2451
2452         err = enic_dev_init(enic);
2453         if (err) {
2454                 dev_err(dev, "Device initialization failed, aborting\n");
2455                 goto err_out_dev_close;
2456         }
2457
2458         netif_set_real_num_tx_queues(netdev, enic->wq_count);
2459         netif_set_real_num_rx_queues(netdev, enic->rq_count);
2460
2461         /* Setup notification timer, HW reset task, and wq locks
2462          */
2463
2464         init_timer(&enic->notify_timer);
2465         enic->notify_timer.function = enic_notify_timer;
2466         enic->notify_timer.data = (unsigned long)enic;
2467
2468         enic_set_rx_coal_setting(enic);
2469         INIT_WORK(&enic->reset, enic_reset);
2470         INIT_WORK(&enic->change_mtu_work, enic_change_mtu_work);
2471
2472         for (i = 0; i < enic->wq_count; i++)
2473                 spin_lock_init(&enic->wq_lock[i]);
2474
2475         /* Register net device
2476          */
2477
2478         enic->port_mtu = enic->config.mtu;
2479         (void)enic_change_mtu(netdev, enic->port_mtu);
2480
2481         err = enic_set_mac_addr(netdev, enic->mac_addr);
2482         if (err) {
2483                 dev_err(dev, "Invalid MAC address, aborting\n");
2484                 goto err_out_dev_deinit;
2485         }
2486
2487         enic->tx_coalesce_usecs = enic->config.intr_timer_usec;
2488         /* rx coalesce time already got initialized. This gets used
2489          * if adaptive coal is turned off
2490          */
2491         enic->rx_coalesce_usecs = enic->tx_coalesce_usecs;
2492
2493         if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic))
2494                 netdev->netdev_ops = &enic_netdev_dynamic_ops;
2495         else
2496                 netdev->netdev_ops = &enic_netdev_ops;
2497
2498         netdev->watchdog_timeo = 2 * HZ;
2499         enic_set_ethtool_ops(netdev);
2500
2501         netdev->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX;
2502         if (ENIC_SETTING(enic, LOOP)) {
2503                 netdev->features &= ~NETIF_F_HW_VLAN_CTAG_TX;
2504                 enic->loop_enable = 1;
2505                 enic->loop_tag = enic->config.loop_tag;
2506                 dev_info(dev, "loopback tag=0x%04x\n", enic->loop_tag);
2507         }
2508         if (ENIC_SETTING(enic, TXCSUM))
2509                 netdev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM;
2510         if (ENIC_SETTING(enic, TSO))
2511                 netdev->hw_features |= NETIF_F_TSO |
2512                         NETIF_F_TSO6 | NETIF_F_TSO_ECN;
2513         if (ENIC_SETTING(enic, RSS))
2514                 netdev->hw_features |= NETIF_F_RXHASH;
2515         if (ENIC_SETTING(enic, RXCSUM))
2516                 netdev->hw_features |= NETIF_F_RXCSUM;
2517
2518         netdev->features |= netdev->hw_features;
2519
2520 #ifdef CONFIG_RFS_ACCEL
2521         netdev->hw_features |= NETIF_F_NTUPLE;
2522 #endif
2523
2524         if (using_dac)
2525                 netdev->features |= NETIF_F_HIGHDMA;
2526
2527         netdev->priv_flags |= IFF_UNICAST_FLT;
2528
2529         err = register_netdev(netdev);
2530         if (err) {
2531                 dev_err(dev, "Cannot register net device, aborting\n");
2532                 goto err_out_dev_deinit;
2533         }
2534
2535         return 0;
2536
2537 err_out_dev_deinit:
2538         enic_dev_deinit(enic);
2539 err_out_dev_close:
2540         vnic_dev_close(enic->vdev);
2541 err_out_disable_sriov:
2542         kfree(enic->pp);
2543 err_out_disable_sriov_pp:
2544 #ifdef CONFIG_PCI_IOV
2545         if (enic_sriov_enabled(enic)) {
2546                 pci_disable_sriov(pdev);
2547                 enic->priv_flags &= ~ENIC_SRIOV_ENABLED;
2548         }
2549 err_out_vnic_unregister:
2550 #endif
2551         vnic_dev_unregister(enic->vdev);
2552 err_out_iounmap:
2553         enic_iounmap(enic);
2554 err_out_release_regions:
2555         pci_release_regions(pdev);
2556 err_out_disable_device:
2557         pci_disable_device(pdev);
2558 err_out_free_netdev:
2559         free_netdev(netdev);
2560
2561         return err;
2562 }
2563
2564 static void enic_remove(struct pci_dev *pdev)
2565 {
2566         struct net_device *netdev = pci_get_drvdata(pdev);
2567
2568         if (netdev) {
2569                 struct enic *enic = netdev_priv(netdev);
2570
2571                 cancel_work_sync(&enic->reset);
2572                 cancel_work_sync(&enic->change_mtu_work);
2573                 unregister_netdev(netdev);
2574                 enic_dev_deinit(enic);
2575                 vnic_dev_close(enic->vdev);
2576 #ifdef CONFIG_PCI_IOV
2577                 if (enic_sriov_enabled(enic)) {
2578                         pci_disable_sriov(pdev);
2579                         enic->priv_flags &= ~ENIC_SRIOV_ENABLED;
2580                 }
2581 #endif
2582                 kfree(enic->pp);
2583                 vnic_dev_unregister(enic->vdev);
2584                 enic_iounmap(enic);
2585                 pci_release_regions(pdev);
2586                 pci_disable_device(pdev);
2587                 free_netdev(netdev);
2588         }
2589 }
2590
2591 static struct pci_driver enic_driver = {
2592         .name = DRV_NAME,
2593         .id_table = enic_id_table,
2594         .probe = enic_probe,
2595         .remove = enic_remove,
2596 };
2597
2598 static int __init enic_init_module(void)
2599 {
2600         pr_info("%s, ver %s\n", DRV_DESCRIPTION, DRV_VERSION);
2601
2602         return pci_register_driver(&enic_driver);
2603 }
2604
2605 static void __exit enic_cleanup_module(void)
2606 {
2607         pci_unregister_driver(&enic_driver);
2608 }
2609
2610 module_init(enic_init_module);
2611 module_exit(enic_cleanup_module);