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 #define RX_COPYBREAK_DEFAULT            256
  70
  71 /* Supported devices */
  72 static const struct pci_device_id enic_id_table[] = {
  73         { PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET) },
  74         { PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET_DYN) },
  75         { PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET_VF) },
  76         { 0, }  /* end of table */
  77 };
  78
  79 MODULE_DESCRIPTION(DRV_DESCRIPTION);
  80 MODULE_AUTHOR("Scott Feldman <scofeldm@cisco.com>");
  81 MODULE_LICENSE("GPL");
  82 MODULE_VERSION(DRV_VERSION);
  83 MODULE_DEVICE_TABLE(pci, enic_id_table);
  84
  85 #define ENIC_LARGE_PKT_THRESHOLD                1000
  86 #define ENIC_MAX_COALESCE_TIMERS                10
  87 /*  Interrupt moderation table, which will be used to decide the
  88  *  coalescing timer values
  89  *  {rx_rate in Mbps, mapping percentage of the range}
  90  */
  91 struct enic_intr_mod_table mod_table[ENIC_MAX_COALESCE_TIMERS + 1] = {
  92         {4000,  0},
  93         {4400, 10},
  94         {5060, 20},
  95         {5230, 30},
  96         {5540, 40},
  97         {5820, 50},
  98         {6120, 60},
  99         {6435, 70},
 100         {6745, 80},
 101         {7000, 90},
 102         {0xFFFFFFFF, 100}
 103 };
 104
 105 /* This table helps the driver to pick different ranges for rx coalescing
 106  * timer depending on the link speed.
 107  */
 108 struct enic_intr_mod_range mod_range[ENIC_MAX_LINK_SPEEDS] = {
 109         {0,  0}, /* 0  - 4  Gbps */
 110         {0,  3}, /* 4  - 10 Gbps */
 111         {3,  6}, /* 10 - 40 Gbps */
 112 };
 113
 114 int enic_is_dynamic(struct enic *enic)
 115 {
 116         return enic->pdev->device == PCI_DEVICE_ID_CISCO_VIC_ENET_DYN;
 117 }
 118
 119 int enic_sriov_enabled(struct enic *enic)
 120 {
 121         return (enic->priv_flags & ENIC_SRIOV_ENABLED) ? 1 : 0;
 122 }
 123
 124 static int enic_is_sriov_vf(struct enic *enic)
 125 {
 126         return enic->pdev->device == PCI_DEVICE_ID_CISCO_VIC_ENET_VF;
 127 }
 128
 129 int enic_is_valid_vf(struct enic *enic, int vf)
 130 {
 131 #ifdef CONFIG_PCI_IOV
 132         return vf >= 0 && vf < enic->num_vfs;
 133 #else
 134         return 0;
 135 #endif
 136 }
 137
 138 static void enic_free_wq_buf(struct vnic_wq *wq, struct vnic_wq_buf *buf)
 139 {
 140         struct enic *enic = vnic_dev_priv(wq->vdev);
 141
 142         if (buf->sop)
 143                 pci_unmap_single(enic->pdev, buf->dma_addr,
 144                         buf->len, PCI_DMA_TODEVICE);
 145         else
 146                 pci_unmap_page(enic->pdev, buf->dma_addr,
 147                         buf->len, PCI_DMA_TODEVICE);
 148
 149         if (buf->os_buf)
 150                 dev_kfree_skb_any(buf->os_buf);
 151 }
 152
 153 static void enic_wq_free_buf(struct vnic_wq *wq,
 154         struct cq_desc *cq_desc, struct vnic_wq_buf *buf, void *opaque)
 155 {
 156         enic_free_wq_buf(wq, buf);
 157 }
 158
 159 static int enic_wq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc,
 160         u8 type, u16 q_number, u16 completed_index, void *opaque)
 161 {
 162         struct enic *enic = vnic_dev_priv(vdev);
 163
 164         spin_lock(&enic->wq_lock[q_number]);
 165
 166         vnic_wq_service(&enic->wq[q_number], cq_desc,
 167                 completed_index, enic_wq_free_buf,
 168                 opaque);
 169
 170         if (netif_tx_queue_stopped(netdev_get_tx_queue(enic->netdev, q_number)) &&
 171             vnic_wq_desc_avail(&enic->wq[q_number]) >=
 172             (MAX_SKB_FRAGS + ENIC_DESC_MAX_SPLITS))
 173                 netif_wake_subqueue(enic->netdev, q_number);
 174
 175         spin_unlock(&enic->wq_lock[q_number]);
 176
 177         return 0;
 178 }
 179
 180 static void enic_log_q_error(struct enic *enic)
 181 {
 182         unsigned int i;
 183         u32 error_status;
 184
 185         for (i = 0; i < enic->wq_count; i++) {
 186                 error_status = vnic_wq_error_status(&enic->wq[i]);
 187                 if (error_status)
 188                         netdev_err(enic->netdev, "WQ[%d] error_status %d\n",
 189                                 i, error_status);
 190         }
 191
 192         for (i = 0; i < enic->rq_count; i++) {
 193                 error_status = vnic_rq_error_status(&enic->rq[i]);
 194                 if (error_status)
 195                         netdev_err(enic->netdev, "RQ[%d] error_status %d\n",
 196                                 i, error_status);
 197         }
 198 }
 199
 200 static void enic_msglvl_check(struct enic *enic)
 201 {
 202         u32 msg_enable = vnic_dev_msg_lvl(enic->vdev);
 203
 204         if (msg_enable != enic->msg_enable) {
 205                 netdev_info(enic->netdev, "msg lvl changed from 0x%x to 0x%x\n",
 206                         enic->msg_enable, msg_enable);
 207                 enic->msg_enable = msg_enable;
 208         }
 209 }
 210
 211 static void enic_mtu_check(struct enic *enic)
 212 {
 213         u32 mtu = vnic_dev_mtu(enic->vdev);
 214         struct net_device *netdev = enic->netdev;
 215
 216         if (mtu && mtu != enic->port_mtu) {
 217                 enic->port_mtu = mtu;
 218                 if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic)) {
 219                         mtu = max_t(int, ENIC_MIN_MTU,
 220                                 min_t(int, ENIC_MAX_MTU, mtu));
 221                         if (mtu != netdev->mtu)
 222                                 schedule_work(&enic->change_mtu_work);
 223                 } else {
 224                         if (mtu < netdev->mtu)
 225                                 netdev_warn(netdev,
 226                                         "interface MTU (%d) set higher "
 227                                         "than switch port MTU (%d)\n",
 228                                         netdev->mtu, mtu);
 229                 }
 230         }
 231 }
 232
 233 static void enic_link_check(struct enic *enic)
 234 {
 235         int link_status = vnic_dev_link_status(enic->vdev);
 236         int carrier_ok = netif_carrier_ok(enic->netdev);
 237
 238         if (link_status && !carrier_ok) {
 239                 netdev_info(enic->netdev, "Link UP\n");
 240                 netif_carrier_on(enic->netdev);
 241         } else if (!link_status && carrier_ok) {
 242                 netdev_info(enic->netdev, "Link DOWN\n");
 243                 netif_carrier_off(enic->netdev);
 244         }
 245 }
 246
 247 static void enic_notify_check(struct enic *enic)
 248 {
 249         enic_msglvl_check(enic);
 250         enic_mtu_check(enic);
 251         enic_link_check(enic);
 252 }
 253
 254 #define ENIC_TEST_INTR(pba, i) (pba & (1 << i))
 255
 256 static irqreturn_t enic_isr_legacy(int irq, void *data)
 257 {
 258         struct net_device *netdev = data;
 259         struct enic *enic = netdev_priv(netdev);
 260         unsigned int io_intr = enic_legacy_io_intr();
 261         unsigned int err_intr = enic_legacy_err_intr();
 262         unsigned int notify_intr = enic_legacy_notify_intr();
 263         u32 pba;
 264
 265         vnic_intr_mask(&enic->intr[io_intr]);
 266
 267         pba = vnic_intr_legacy_pba(enic->legacy_pba);
 268         if (!pba) {
 269                 vnic_intr_unmask(&enic->intr[io_intr]);
 270                 return IRQ_NONE;        /* not our interrupt */
 271         }
 272
 273         if (ENIC_TEST_INTR(pba, notify_intr)) {
 274                 vnic_intr_return_all_credits(&enic->intr[notify_intr]);
 275                 enic_notify_check(enic);
 276         }
 277
 278         if (ENIC_TEST_INTR(pba, err_intr)) {
 279                 vnic_intr_return_all_credits(&enic->intr[err_intr]);
 280                 enic_log_q_error(enic);
 281                 /* schedule recovery from WQ/RQ error */
 282                 schedule_work(&enic->reset);
 283                 return IRQ_HANDLED;
 284         }
 285
 286         if (ENIC_TEST_INTR(pba, io_intr)) {
 287                 if (napi_schedule_prep(&enic->napi[0]))
 288                         __napi_schedule(&enic->napi[0]);
 289         } else {
 290                 vnic_intr_unmask(&enic->intr[io_intr]);
 291         }
 292
 293         return IRQ_HANDLED;
 294 }
 295
 296 static irqreturn_t enic_isr_msi(int irq, void *data)
 297 {
 298         struct enic *enic = data;
 299
 300         /* With MSI, there is no sharing of interrupts, so this is
 301          * our interrupt and there is no need to ack it.  The device
 302          * is not providing per-vector masking, so the OS will not
 303          * write to PCI config space to mask/unmask the interrupt.
 304          * We're using mask_on_assertion for MSI, so the device
 305          * automatically masks the interrupt when the interrupt is
 306          * generated.  Later, when exiting polling, the interrupt
 307          * will be unmasked (see enic_poll).
 308          *
 309          * Also, the device uses the same PCIe Traffic Class (TC)
 310          * for Memory Write data and MSI, so there are no ordering
 311          * issues; the MSI will always arrive at the Root Complex
 312          * _after_ corresponding Memory Writes (i.e. descriptor
 313          * writes).
 314          */
 315
 316         napi_schedule(&enic->napi[0]);
 317
 318         return IRQ_HANDLED;
 319 }
 320
 321 static irqreturn_t enic_isr_msix(int irq, void *data)
 322 {
 323         struct napi_struct *napi = data;
 324
 325         napi_schedule(napi);
 326
 327         return IRQ_HANDLED;
 328 }
 329
 330 static irqreturn_t enic_isr_msix_err(int irq, void *data)
 331 {
 332         struct enic *enic = data;
 333         unsigned int intr = enic_msix_err_intr(enic);
 334
 335         vnic_intr_return_all_credits(&enic->intr[intr]);
 336
 337         enic_log_q_error(enic);
 338
 339         /* schedule recovery from WQ/RQ error */
 340         schedule_work(&enic->reset);
 341
 342         return IRQ_HANDLED;
 343 }
 344
 345 static irqreturn_t enic_isr_msix_notify(int irq, void *data)
 346 {
 347         struct enic *enic = data;
 348         unsigned int intr = enic_msix_notify_intr(enic);
 349
 350         vnic_intr_return_all_credits(&enic->intr[intr]);
 351         enic_notify_check(enic);
 352
 353         return IRQ_HANDLED;
 354 }
 355
 356 static inline void enic_queue_wq_skb_cont(struct enic *enic,
 357         struct vnic_wq *wq, struct sk_buff *skb,
 358         unsigned int len_left, int loopback)
 359 {
 360         const skb_frag_t *frag;
 361
 362         /* Queue additional data fragments */
 363         for (frag = skb_shinfo(skb)->frags; len_left; frag++) {
 364                 len_left -= skb_frag_size(frag);
 365                 enic_queue_wq_desc_cont(wq, skb,
 366                         skb_frag_dma_map(&enic->pdev->dev,
 367                                          frag, 0, skb_frag_size(frag),
 368                                          DMA_TO_DEVICE),
 369                         skb_frag_size(frag),
 370                         (len_left == 0),        /* EOP? */
 371                         loopback);
 372         }
 373 }
 374
 375 static inline void enic_queue_wq_skb_vlan(struct enic *enic,
 376         struct vnic_wq *wq, struct sk_buff *skb,
 377         int vlan_tag_insert, unsigned int vlan_tag, int loopback)
 378 {
 379         unsigned int head_len = skb_headlen(skb);
 380         unsigned int len_left = skb->len - head_len;
 381         int eop = (len_left == 0);
 382
 383         /* Queue the main skb fragment. The fragments are no larger
 384          * than max MTU(9000)+ETH_HDR_LEN(14) bytes, which is less
 385          * than WQ_ENET_MAX_DESC_LEN length. So only one descriptor
 386          * per fragment is queued.
 387          */
 388         enic_queue_wq_desc(wq, skb,
 389                 pci_map_single(enic->pdev, skb->data,
 390                         head_len, PCI_DMA_TODEVICE),
 391                 head_len,
 392                 vlan_tag_insert, vlan_tag,
 393                 eop, loopback);
 394
 395         if (!eop)
 396                 enic_queue_wq_skb_cont(enic, wq, skb, len_left, loopback);
 397 }
 398
 399 static inline void enic_queue_wq_skb_csum_l4(struct enic *enic,
 400         struct vnic_wq *wq, struct sk_buff *skb,
 401         int vlan_tag_insert, unsigned int vlan_tag, int loopback)
 402 {
 403         unsigned int head_len = skb_headlen(skb);
 404         unsigned int len_left = skb->len - head_len;
 405         unsigned int hdr_len = skb_checksum_start_offset(skb);
 406         unsigned int csum_offset = hdr_len + skb->csum_offset;
 407         int eop = (len_left == 0);
 408
 409         /* Queue the main skb fragment. The fragments are no larger
 410          * than max MTU(9000)+ETH_HDR_LEN(14) bytes, which is less
 411          * than WQ_ENET_MAX_DESC_LEN length. So only one descriptor
 412          * per fragment is queued.
 413          */
 414         enic_queue_wq_desc_csum_l4(wq, skb,
 415                 pci_map_single(enic->pdev, skb->data,
 416                         head_len, PCI_DMA_TODEVICE),
 417                 head_len,
 418                 csum_offset,
 419                 hdr_len,
 420                 vlan_tag_insert, vlan_tag,
 421                 eop, loopback);
 422
 423         if (!eop)
 424                 enic_queue_wq_skb_cont(enic, wq, skb, len_left, loopback);
 425 }
 426
 427 static inline void enic_queue_wq_skb_tso(struct enic *enic,
 428         struct vnic_wq *wq, struct sk_buff *skb, unsigned int mss,
 429         int vlan_tag_insert, unsigned int vlan_tag, int loopback)
 430 {
 431         unsigned int frag_len_left = skb_headlen(skb);
 432         unsigned int len_left = skb->len - frag_len_left;
 433         unsigned int hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
 434         int eop = (len_left == 0);
 435         unsigned int len;
 436         dma_addr_t dma_addr;
 437         unsigned int offset = 0;
 438         skb_frag_t *frag;
 439
 440         /* Preload TCP csum field with IP pseudo hdr calculated
 441          * with IP length set to zero.  HW will later add in length
 442          * to each TCP segment resulting from the TSO.
 443          */
 444
 445         if (skb->protocol == cpu_to_be16(ETH_P_IP)) {
 446                 ip_hdr(skb)->check = 0;
 447                 tcp_hdr(skb)->check = ~csum_tcpudp_magic(ip_hdr(skb)->saddr,
 448                         ip_hdr(skb)->daddr, 0, IPPROTO_TCP, 0);
 449         } else if (skb->protocol == cpu_to_be16(ETH_P_IPV6)) {
 450                 tcp_hdr(skb)->check = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
 451                         &ipv6_hdr(skb)->daddr, 0, IPPROTO_TCP, 0);
 452         }
 453
 454         /* Queue WQ_ENET_MAX_DESC_LEN length descriptors
 455          * for the main skb fragment
 456          */
 457         while (frag_len_left) {
 458                 len = min(frag_len_left, (unsigned int)WQ_ENET_MAX_DESC_LEN);
 459                 dma_addr = pci_map_single(enic->pdev, skb->data + offset,
 460                                 len, PCI_DMA_TODEVICE);
 461                 enic_queue_wq_desc_tso(wq, skb,
 462                         dma_addr,
 463                         len,
 464                         mss, hdr_len,
 465                         vlan_tag_insert, vlan_tag,
 466                         eop && (len == frag_len_left), loopback);
 467                 frag_len_left -= len;
 468                 offset += len;
 469         }
 470
 471         if (eop)
 472                 return;
 473
 474         /* Queue WQ_ENET_MAX_DESC_LEN length descriptors
 475          * for additional data fragments
 476          */
 477         for (frag = skb_shinfo(skb)->frags; len_left; frag++) {
 478                 len_left -= skb_frag_size(frag);
 479                 frag_len_left = skb_frag_size(frag);
 480                 offset = 0;
 481
 482                 while (frag_len_left) {
 483                         len = min(frag_len_left,
 484                                 (unsigned int)WQ_ENET_MAX_DESC_LEN);
 485                         dma_addr = skb_frag_dma_map(&enic->pdev->dev, frag,
 486                                                     offset, len,
 487                                                     DMA_TO_DEVICE);
 488                         enic_queue_wq_desc_cont(wq, skb,
 489                                 dma_addr,
 490                                 len,
 491                                 (len_left == 0) &&
 492                                 (len == frag_len_left),         /* EOP? */
 493                                 loopback);
 494                         frag_len_left -= len;
 495                         offset += len;
 496                 }
 497         }
 498 }
 499
 500 static inline void enic_queue_wq_skb(struct enic *enic,
 501         struct vnic_wq *wq, struct sk_buff *skb)
 502 {
 503         unsigned int mss = skb_shinfo(skb)->gso_size;
 504         unsigned int vlan_tag = 0;
 505         int vlan_tag_insert = 0;
 506         int loopback = 0;
 507
 508         if (vlan_tx_tag_present(skb)) {
 509                 /* VLAN tag from trunking driver */
 510                 vlan_tag_insert = 1;
 511                 vlan_tag = vlan_tx_tag_get(skb);
 512         } else if (enic->loop_enable) {
 513                 vlan_tag = enic->loop_tag;
 514                 loopback = 1;
 515         }
 516
 517         if (mss)
 518                 enic_queue_wq_skb_tso(enic, wq, skb, mss,
 519                         vlan_tag_insert, vlan_tag, loopback);
 520         else if (skb->ip_summed == CHECKSUM_PARTIAL)
 521                 enic_queue_wq_skb_csum_l4(enic, wq, skb,
 522                         vlan_tag_insert, vlan_tag, loopback);
 523         else
 524                 enic_queue_wq_skb_vlan(enic, wq, skb,
 525                         vlan_tag_insert, vlan_tag, loopback);
 526 }
 527
 528 /* netif_tx_lock held, process context with BHs disabled, or BH */
 529 static netdev_tx_t enic_hard_start_xmit(struct sk_buff *skb,
 530         struct net_device *netdev)
 531 {
 532         struct enic *enic = netdev_priv(netdev);
 533         struct vnic_wq *wq;
 534         unsigned long flags;
 535         unsigned int txq_map;
 536
 537         if (skb->len <= 0) {
 538                 dev_kfree_skb_any(skb);
 539                 return NETDEV_TX_OK;
 540         }
 541
 542         txq_map = skb_get_queue_mapping(skb) % enic->wq_count;
 543         wq = &enic->wq[txq_map];
 544
 545         /* Non-TSO sends must fit within ENIC_NON_TSO_MAX_DESC descs,
 546          * which is very likely.  In the off chance it's going to take
 547          * more than * ENIC_NON_TSO_MAX_DESC, linearize the skb.
 548          */
 549
 550         if (skb_shinfo(skb)->gso_size == 0 &&
 551             skb_shinfo(skb)->nr_frags + 1 > ENIC_NON_TSO_MAX_DESC &&
 552             skb_linearize(skb)) {
 553                 dev_kfree_skb_any(skb);
 554                 return NETDEV_TX_OK;
 555         }
 556
 557         spin_lock_irqsave(&enic->wq_lock[txq_map], flags);
 558
 559         if (vnic_wq_desc_avail(wq) <
 560             skb_shinfo(skb)->nr_frags + ENIC_DESC_MAX_SPLITS) {
 561                 netif_tx_stop_queue(netdev_get_tx_queue(netdev, txq_map));
 562                 /* This is a hard error, log it */
 563                 netdev_err(netdev, "BUG! Tx ring full when queue awake!\n");
 564                 spin_unlock_irqrestore(&enic->wq_lock[txq_map], flags);
 565                 return NETDEV_TX_BUSY;
 566         }
 567
 568         enic_queue_wq_skb(enic, wq, skb);
 569
 570         if (vnic_wq_desc_avail(wq) < MAX_SKB_FRAGS + ENIC_DESC_MAX_SPLITS)
 571                 netif_tx_stop_queue(netdev_get_tx_queue(netdev, txq_map));
 572
 573         spin_unlock_irqrestore(&enic->wq_lock[txq_map], flags);
 574
 575         return NETDEV_TX_OK;
 576 }
 577
 578 /* dev_base_lock rwlock held, nominally process context */
 579 static struct rtnl_link_stats64 *enic_get_stats(struct net_device *netdev,
 580                                                 struct rtnl_link_stats64 *net_stats)
 581 {
 582         struct enic *enic = netdev_priv(netdev);
 583         struct vnic_stats *stats;
 584
 585         enic_dev_stats_dump(enic, &stats);
 586
 587         net_stats->tx_packets = stats->tx.tx_frames_ok;
 588         net_stats->tx_bytes = stats->tx.tx_bytes_ok;
 589         net_stats->tx_errors = stats->tx.tx_errors;
 590         net_stats->tx_dropped = stats->tx.tx_drops;
 591
 592         net_stats->rx_packets = stats->rx.rx_frames_ok;
 593         net_stats->rx_bytes = stats->rx.rx_bytes_ok;
 594         net_stats->rx_errors = stats->rx.rx_errors;
 595         net_stats->multicast = stats->rx.rx_multicast_frames_ok;
 596         net_stats->rx_over_errors = enic->rq_truncated_pkts;
 597         net_stats->rx_crc_errors = enic->rq_bad_fcs;
 598         net_stats->rx_dropped = stats->rx.rx_no_bufs + stats->rx.rx_drop;
 599
 600         return net_stats;
 601 }
 602
 603 static int enic_mc_sync(struct net_device *netdev, const u8 *mc_addr)
 604 {
 605         struct enic *enic = netdev_priv(netdev);
 606
 607         if (enic->mc_count == ENIC_MULTICAST_PERFECT_FILTERS) {
 608                 unsigned int mc_count = netdev_mc_count(netdev);
 609
 610                 netdev_warn(netdev, "Registering only %d out of %d multicast addresses\n",
 611                             ENIC_MULTICAST_PERFECT_FILTERS, mc_count);
 612
 613                 return -ENOSPC;
 614         }
 615
 616         enic_dev_add_addr(enic, mc_addr);
 617         enic->mc_count++;
 618
 619         return 0;
 620 }
 621
 622 static int enic_mc_unsync(struct net_device *netdev, const u8 *mc_addr)
 623 {
 624         struct enic *enic = netdev_priv(netdev);
 625
 626         enic_dev_del_addr(enic, mc_addr);
 627         enic->mc_count--;
 628
 629         return 0;
 630 }
 631
 632 static int enic_uc_sync(struct net_device *netdev, const u8 *uc_addr)
 633 {
 634         struct enic *enic = netdev_priv(netdev);
 635
 636         if (enic->uc_count == ENIC_UNICAST_PERFECT_FILTERS) {
 637                 unsigned int uc_count = netdev_uc_count(netdev);
 638
 639                 netdev_warn(netdev, "Registering only %d out of %d unicast addresses\n",
 640                             ENIC_UNICAST_PERFECT_FILTERS, uc_count);
 641
 642                 return -ENOSPC;
 643         }
 644
 645         enic_dev_add_addr(enic, uc_addr);
 646         enic->uc_count++;
 647
 648         return 0;
 649 }
 650
 651 static int enic_uc_unsync(struct net_device *netdev, const u8 *uc_addr)
 652 {
 653         struct enic *enic = netdev_priv(netdev);
 654
 655         enic_dev_del_addr(enic, uc_addr);
 656         enic->uc_count--;
 657
 658         return 0;
 659 }
 660
 661 void enic_reset_addr_lists(struct enic *enic)
 662 {
 663         struct net_device *netdev = enic->netdev;
 664
 665         __dev_uc_unsync(netdev, NULL);
 666         __dev_mc_unsync(netdev, NULL);
 667
 668         enic->mc_count = 0;
 669         enic->uc_count = 0;
 670         enic->flags = 0;
 671 }
 672
 673 static int enic_set_mac_addr(struct net_device *netdev, char *addr)
 674 {
 675         struct enic *enic = netdev_priv(netdev);
 676
 677         if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic)) {
 678                 if (!is_valid_ether_addr(addr) && !is_zero_ether_addr(addr))
 679                         return -EADDRNOTAVAIL;
 680         } else {
 681                 if (!is_valid_ether_addr(addr))
 682                         return -EADDRNOTAVAIL;
 683         }
 684
 685         memcpy(netdev->dev_addr, addr, netdev->addr_len);
 686
 687         return 0;
 688 }
 689
 690 static int enic_set_mac_address_dynamic(struct net_device *netdev, void *p)
 691 {
 692         struct enic *enic = netdev_priv(netdev);
 693         struct sockaddr *saddr = p;
 694         char *addr = saddr->sa_data;
 695         int err;
 696
 697         if (netif_running(enic->netdev)) {
 698                 err = enic_dev_del_station_addr(enic);
 699                 if (err)
 700                         return err;
 701         }
 702
 703         err = enic_set_mac_addr(netdev, addr);
 704         if (err)
 705                 return err;
 706
 707         if (netif_running(enic->netdev)) {
 708                 err = enic_dev_add_station_addr(enic);
 709                 if (err)
 710                         return err;
 711         }
 712
 713         return err;
 714 }
 715
 716 static int enic_set_mac_address(struct net_device *netdev, void *p)
 717 {
 718         struct sockaddr *saddr = p;
 719         char *addr = saddr->sa_data;
 720         struct enic *enic = netdev_priv(netdev);
 721         int err;
 722
 723         err = enic_dev_del_station_addr(enic);
 724         if (err)
 725                 return err;
 726
 727         err = enic_set_mac_addr(netdev, addr);
 728         if (err)
 729                 return err;
 730
 731         return enic_dev_add_station_addr(enic);
 732 }
 733
 734 /* netif_tx_lock held, BHs disabled */
 735 static void enic_set_rx_mode(struct net_device *netdev)
 736 {
 737         struct enic *enic = netdev_priv(netdev);
 738         int directed = 1;
 739         int multicast = (netdev->flags & IFF_MULTICAST) ? 1 : 0;
 740         int broadcast = (netdev->flags & IFF_BROADCAST) ? 1 : 0;
 741         int promisc = (netdev->flags & IFF_PROMISC) ||
 742                 netdev_uc_count(netdev) > ENIC_UNICAST_PERFECT_FILTERS;
 743         int allmulti = (netdev->flags & IFF_ALLMULTI) ||
 744                 netdev_mc_count(netdev) > ENIC_MULTICAST_PERFECT_FILTERS;
 745         unsigned int flags = netdev->flags |
 746                 (allmulti ? IFF_ALLMULTI : 0) |
 747                 (promisc ? IFF_PROMISC : 0);
 748
 749         if (enic->flags != flags) {
 750                 enic->flags = flags;
 751                 enic_dev_packet_filter(enic, directed,
 752                         multicast, broadcast, promisc, allmulti);
 753         }
 754
 755         if (!promisc) {
 756                 __dev_uc_sync(netdev, enic_uc_sync, enic_uc_unsync);
 757                 if (!allmulti)
 758                         __dev_mc_sync(netdev, enic_mc_sync, enic_mc_unsync);
 759         }
 760 }
 761
 762 /* netif_tx_lock held, BHs disabled */
 763 static void enic_tx_timeout(struct net_device *netdev)
 764 {
 765         struct enic *enic = netdev_priv(netdev);
 766         schedule_work(&enic->reset);
 767 }
 768
 769 static int enic_set_vf_mac(struct net_device *netdev, int vf, u8 *mac)
 770 {
 771         struct enic *enic = netdev_priv(netdev);
 772         struct enic_port_profile *pp;
 773         int err;
 774
 775         ENIC_PP_BY_INDEX(enic, vf, pp, &err);
 776         if (err)
 777                 return err;
 778
 779         if (is_valid_ether_addr(mac) || is_zero_ether_addr(mac)) {
 780                 if (vf == PORT_SELF_VF) {
 781                         memcpy(pp->vf_mac, mac, ETH_ALEN);
 782                         return 0;
 783                 } else {
 784                         /*
 785                          * For sriov vf's set the mac in hw
 786                          */
 787                         ENIC_DEVCMD_PROXY_BY_INDEX(vf, err, enic,
 788                                 vnic_dev_set_mac_addr, mac);
 789                         return enic_dev_status_to_errno(err);
 790                 }
 791         } else
 792                 return -EINVAL;
 793 }
 794
 795 static int enic_set_vf_port(struct net_device *netdev, int vf,
 796         struct nlattr *port[])
 797 {
 798         struct enic *enic = netdev_priv(netdev);
 799         struct enic_port_profile prev_pp;
 800         struct enic_port_profile *pp;
 801         int err = 0, restore_pp = 1;
 802
 803         ENIC_PP_BY_INDEX(enic, vf, pp, &err);
 804         if (err)
 805                 return err;
 806
 807         if (!port[IFLA_PORT_REQUEST])
 808                 return -EOPNOTSUPP;
 809
 810         memcpy(&prev_pp, pp, sizeof(*enic->pp));
 811         memset(pp, 0, sizeof(*enic->pp));
 812
 813         pp->set |= ENIC_SET_REQUEST;
 814         pp->request = nla_get_u8(port[IFLA_PORT_REQUEST]);
 815
 816         if (port[IFLA_PORT_PROFILE]) {
 817                 pp->set |= ENIC_SET_NAME;
 818                 memcpy(pp->name, nla_data(port[IFLA_PORT_PROFILE]),
 819                         PORT_PROFILE_MAX);
 820         }
 821
 822         if (port[IFLA_PORT_INSTANCE_UUID]) {
 823                 pp->set |= ENIC_SET_INSTANCE;
 824                 memcpy(pp->instance_uuid,
 825                         nla_data(port[IFLA_PORT_INSTANCE_UUID]), PORT_UUID_MAX);
 826         }
 827
 828         if (port[IFLA_PORT_HOST_UUID]) {
 829                 pp->set |= ENIC_SET_HOST;
 830                 memcpy(pp->host_uuid,
 831                         nla_data(port[IFLA_PORT_HOST_UUID]), PORT_UUID_MAX);
 832         }
 833
 834         if (vf == PORT_SELF_VF) {
 835                 /* Special case handling: mac came from IFLA_VF_MAC */
 836                 if (!is_zero_ether_addr(prev_pp.vf_mac))
 837                         memcpy(pp->mac_addr, prev_pp.vf_mac, ETH_ALEN);
 838
 839                 if (is_zero_ether_addr(netdev->dev_addr))
 840                         eth_hw_addr_random(netdev);
 841         } else {
 842                 /* SR-IOV VF: get mac from adapter */
 843                 ENIC_DEVCMD_PROXY_BY_INDEX(vf, err, enic,
 844                         vnic_dev_get_mac_addr, pp->mac_addr);
 845                 if (err) {
 846                         netdev_err(netdev, "Error getting mac for vf %d\n", vf);
 847                         memcpy(pp, &prev_pp, sizeof(*pp));
 848                         return enic_dev_status_to_errno(err);
 849                 }
 850         }
 851
 852         err = enic_process_set_pp_request(enic, vf, &prev_pp, &restore_pp);
 853         if (err) {
 854                 if (restore_pp) {
 855                         /* Things are still the way they were: Implicit
 856                          * DISASSOCIATE failed
 857                          */
 858                         memcpy(pp, &prev_pp, sizeof(*pp));
 859                 } else {
 860                         memset(pp, 0, sizeof(*pp));
 861                         if (vf == PORT_SELF_VF)
 862                                 memset(netdev->dev_addr, 0, ETH_ALEN);
 863                 }
 864         } else {
 865                 /* Set flag to indicate that the port assoc/disassoc
 866                  * request has been sent out to fw
 867                  */
 868                 pp->set |= ENIC_PORT_REQUEST_APPLIED;
 869
 870                 /* If DISASSOCIATE, clean up all assigned/saved macaddresses */
 871                 if (pp->request == PORT_REQUEST_DISASSOCIATE) {
 872                         memset(pp->mac_addr, 0, ETH_ALEN);
 873                         if (vf == PORT_SELF_VF)
 874                                 memset(netdev->dev_addr, 0, ETH_ALEN);
 875                 }
 876         }
 877
 878         if (vf == PORT_SELF_VF)
 879                 memset(pp->vf_mac, 0, ETH_ALEN);
 880
 881         return err;
 882 }
 883
 884 static int enic_get_vf_port(struct net_device *netdev, int vf,
 885         struct sk_buff *skb)
 886 {
 887         struct enic *enic = netdev_priv(netdev);
 888         u16 response = PORT_PROFILE_RESPONSE_SUCCESS;
 889         struct enic_port_profile *pp;
 890         int err;
 891
 892         ENIC_PP_BY_INDEX(enic, vf, pp, &err);
 893         if (err)
 894                 return err;
 895
 896         if (!(pp->set & ENIC_PORT_REQUEST_APPLIED))
 897                 return -ENODATA;
 898
 899         err = enic_process_get_pp_request(enic, vf, pp->request, &response);
 900         if (err)
 901                 return err;
 902
 903         if (nla_put_u16(skb, IFLA_PORT_REQUEST, pp->request) ||
 904             nla_put_u16(skb, IFLA_PORT_RESPONSE, response) ||
 905             ((pp->set & ENIC_SET_NAME) &&
 906              nla_put(skb, IFLA_PORT_PROFILE, PORT_PROFILE_MAX, pp->name)) ||
 907             ((pp->set & ENIC_SET_INSTANCE) &&
 908              nla_put(skb, IFLA_PORT_INSTANCE_UUID, PORT_UUID_MAX,
 909                      pp->instance_uuid)) ||
 910             ((pp->set & ENIC_SET_HOST) &&
 911              nla_put(skb, IFLA_PORT_HOST_UUID, PORT_UUID_MAX, pp->host_uuid)))
 912                 goto nla_put_failure;
 913         return 0;
 914
 915 nla_put_failure:
 916         return -EMSGSIZE;
 917 }
 918
 919 static void enic_free_rq_buf(struct vnic_rq *rq, struct vnic_rq_buf *buf)
 920 {
 921         struct enic *enic = vnic_dev_priv(rq->vdev);
 922
 923         if (!buf->os_buf)
 924                 return;
 925
 926         pci_unmap_single(enic->pdev, buf->dma_addr,
 927                 buf->len, PCI_DMA_FROMDEVICE);
 928         dev_kfree_skb_any(buf->os_buf);
 929         buf->os_buf = NULL;
 930 }
 931
 932 static int enic_rq_alloc_buf(struct vnic_rq *rq)
 933 {
 934         struct enic *enic = vnic_dev_priv(rq->vdev);
 935         struct net_device *netdev = enic->netdev;
 936         struct sk_buff *skb;
 937         unsigned int len = netdev->mtu + VLAN_ETH_HLEN;
 938         unsigned int os_buf_index = 0;
 939         dma_addr_t dma_addr;
 940         struct vnic_rq_buf *buf = rq->to_use;
 941
 942         if (buf->os_buf) {
 943                 buf = buf->next;
 944                 rq->to_use = buf;
 945                 rq->ring.desc_avail--;
 946                 if ((buf->index & VNIC_RQ_RETURN_RATE) == 0) {
 947                         /* Adding write memory barrier prevents compiler and/or
 948                          * CPU reordering, thus avoiding descriptor posting
 949                          * before descriptor is initialized. Otherwise, hardware
 950                          * can read stale descriptor fields.
 951                          */
 952                         wmb();
 953                         iowrite32(buf->index, &rq->ctrl->posted_index);
 954                 }
 955
 956                 return 0;
 957         }
 958         skb = netdev_alloc_skb_ip_align(netdev, len);
 959         if (!skb)
 960                 return -ENOMEM;
 961
 962         dma_addr = pci_map_single(enic->pdev, skb->data,
 963                 len, PCI_DMA_FROMDEVICE);
 964
 965         enic_queue_rq_desc(rq, skb, os_buf_index,
 966                 dma_addr, len);
 967
 968         return 0;
 969 }
 970
 971 static void enic_intr_update_pkt_size(struct vnic_rx_bytes_counter *pkt_size,
 972                                       u32 pkt_len)
 973 {
 974         if (ENIC_LARGE_PKT_THRESHOLD <= pkt_len)
 975                 pkt_size->large_pkt_bytes_cnt += pkt_len;
 976         else
 977                 pkt_size->small_pkt_bytes_cnt += pkt_len;
 978 }
 979
 980 static bool enic_rxcopybreak(struct net_device *netdev, struct sk_buff **skb,
 981                              struct vnic_rq_buf *buf, u16 len)
 982 {
 983         struct enic *enic = netdev_priv(netdev);
 984         struct sk_buff *new_skb;
 985
 986         if (len > enic->rx_copybreak)
 987                 return false;
 988         new_skb = netdev_alloc_skb_ip_align(netdev, len);
 989         if (!new_skb)
 990                 return false;
 991         pci_dma_sync_single_for_cpu(enic->pdev, buf->dma_addr, len,
 992                                     DMA_FROM_DEVICE);
 993         memcpy(new_skb->data, (*skb)->data, len);
 994         *skb = new_skb;
 995
 996         return true;
 997 }
 998
 999 static void enic_rq_indicate_buf(struct vnic_rq *rq,
1000         struct cq_desc *cq_desc, struct vnic_rq_buf *buf,
1001         int skipped, void *opaque)
1002 {
1003         struct enic *enic = vnic_dev_priv(rq->vdev);
1004         struct net_device *netdev = enic->netdev;
1005         struct sk_buff *skb;
1006         struct vnic_cq *cq = &enic->cq[enic_cq_rq(enic, rq->index)];
1007
1008         u8 type, color, eop, sop, ingress_port, vlan_stripped;
1009         u8 fcoe, fcoe_sof, fcoe_fc_crc_ok, fcoe_enc_error, fcoe_eof;
1010         u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok;
1011         u8 ipv6, ipv4, ipv4_fragment, fcs_ok, rss_type, csum_not_calc;
1012         u8 packet_error;
1013         u16 q_number, completed_index, bytes_written, vlan_tci, checksum;
1014         u32 rss_hash;
1015
1016         if (skipped)
1017                 return;
1018
1019         skb = buf->os_buf;
1020
1021         cq_enet_rq_desc_dec((struct cq_enet_rq_desc *)cq_desc,
1022                 &type, &color, &q_number, &completed_index,
1023                 &ingress_port, &fcoe, &eop, &sop, &rss_type,
1024                 &csum_not_calc, &rss_hash, &bytes_written,
1025                 &packet_error, &vlan_stripped, &vlan_tci, &checksum,
1026                 &fcoe_sof, &fcoe_fc_crc_ok, &fcoe_enc_error,
1027                 &fcoe_eof, &tcp_udp_csum_ok, &udp, &tcp,
1028                 &ipv4_csum_ok, &ipv6, &ipv4, &ipv4_fragment,
1029                 &fcs_ok);
1030
1031         if (packet_error) {
1032
1033                 if (!fcs_ok) {
1034                         if (bytes_written > 0)
1035                                 enic->rq_bad_fcs++;
1036                         else if (bytes_written == 0)
1037                                 enic->rq_truncated_pkts++;
1038                 }
1039
1040                 dev_kfree_skb_any(skb);
1041
1042                 return;
1043         }
1044
1045         if (eop && bytes_written > 0) {
1046
1047                 /* Good receive
1048                  */
1049
1050                 if (!enic_rxcopybreak(netdev, &skb, buf, bytes_written)) {
1051                         buf->os_buf = NULL;
1052                         pci_unmap_single(enic->pdev, buf->dma_addr, buf->len,
1053                                          PCI_DMA_FROMDEVICE);
1054                 }
1055                 prefetch(skb->data - NET_IP_ALIGN);
1056
1057                 skb_put(skb, bytes_written);
1058                 skb->protocol = eth_type_trans(skb, netdev);
1059                 skb_record_rx_queue(skb, q_number);
1060                 if (netdev->features & NETIF_F_RXHASH) {
1061                         skb_set_hash(skb, rss_hash,
1062                                      (rss_type &
1063                                       (NIC_CFG_RSS_HASH_TYPE_TCP_IPV6_EX |
1064                                        NIC_CFG_RSS_HASH_TYPE_TCP_IPV6 |
1065                                        NIC_CFG_RSS_HASH_TYPE_TCP_IPV4)) ?
1066                                      PKT_HASH_TYPE_L4 : PKT_HASH_TYPE_L3);
1067                 }
1068
1069                 if ((netdev->features & NETIF_F_RXCSUM) && !csum_not_calc) {
1070                         skb->csum = htons(checksum);
1071                         skb->ip_summed = CHECKSUM_COMPLETE;
1072                 }
1073
1074                 if (vlan_stripped)
1075                         __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan_tci);
1076
1077                 skb_mark_napi_id(skb, &enic->napi[rq->index]);
1078                 if (enic_poll_busy_polling(rq) ||
1079                     !(netdev->features & NETIF_F_GRO))
1080                         netif_receive_skb(skb);
1081                 else
1082                         napi_gro_receive(&enic->napi[q_number], skb);
1083                 if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce)
1084                         enic_intr_update_pkt_size(&cq->pkt_size_counter,
1085                                                   bytes_written);
1086         } else {
1087
1088                 /* Buffer overflow
1089                  */
1090
1091                 dev_kfree_skb_any(skb);
1092         }
1093 }
1094
1095 static int enic_rq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc,
1096         u8 type, u16 q_number, u16 completed_index, void *opaque)
1097 {
1098         struct enic *enic = vnic_dev_priv(vdev);
1099
1100         vnic_rq_service(&enic->rq[q_number], cq_desc,
1101                 completed_index, VNIC_RQ_RETURN_DESC,
1102                 enic_rq_indicate_buf, opaque);
1103
1104         return 0;
1105 }
1106
1107 static int enic_poll(struct napi_struct *napi, int budget)
1108 {
1109         struct net_device *netdev = napi->dev;
1110         struct enic *enic = netdev_priv(netdev);
1111         unsigned int cq_rq = enic_cq_rq(enic, 0);
1112         unsigned int cq_wq = enic_cq_wq(enic, 0);
1113         unsigned int intr = enic_legacy_io_intr();
1114         unsigned int rq_work_to_do = budget;
1115         unsigned int wq_work_to_do = -1; /* no limit */
1116         unsigned int  work_done, rq_work_done = 0, wq_work_done;
1117         int err;
1118
1119         wq_work_done = vnic_cq_service(&enic->cq[cq_wq], wq_work_to_do,
1120                                        enic_wq_service, NULL);
1121
1122         if (!enic_poll_lock_napi(&enic->rq[cq_rq])) {
1123                 if (wq_work_done > 0)
1124                         vnic_intr_return_credits(&enic->intr[intr],
1125                                                  wq_work_done,
1126                                                  0 /* dont unmask intr */,
1127                                                  0 /* dont reset intr timer */);
1128                 return rq_work_done;
1129         }
1130
1131         if (budget > 0)
1132                 rq_work_done = vnic_cq_service(&enic->cq[cq_rq],
1133                         rq_work_to_do, enic_rq_service, NULL);
1134
1135         /* Accumulate intr event credits for this polling
1136          * cycle.  An intr event is the completion of a
1137          * a WQ or RQ packet.
1138          */
1139
1140         work_done = rq_work_done + wq_work_done;
1141
1142         if (work_done > 0)
1143                 vnic_intr_return_credits(&enic->intr[intr],
1144                         work_done,
1145                         0 /* don't unmask intr */,
1146                         0 /* don't reset intr timer */);
1147
1148         err = vnic_rq_fill(&enic->rq[0], enic_rq_alloc_buf);
1149
1150         /* Buffer allocation failed. Stay in polling
1151          * mode so we can try to fill the ring again.
1152          */
1153
1154         if (err)
1155                 rq_work_done = rq_work_to_do;
1156
1157         if (rq_work_done < rq_work_to_do) {
1158
1159                 /* Some work done, but not enough to stay in polling,
1160                  * exit polling
1161                  */
1162
1163                 napi_complete(napi);
1164                 vnic_intr_unmask(&enic->intr[intr]);
1165         }
1166         enic_poll_unlock_napi(&enic->rq[cq_rq]);
1167
1168         return rq_work_done;
1169 }
1170
1171 static void enic_set_int_moderation(struct enic *enic, struct vnic_rq *rq)
1172 {
1173         unsigned int intr = enic_msix_rq_intr(enic, rq->index);
1174         struct vnic_cq *cq = &enic->cq[enic_cq_rq(enic, rq->index)];
1175         u32 timer = cq->tobe_rx_coal_timeval;
1176
1177         if (cq->tobe_rx_coal_timeval != cq->cur_rx_coal_timeval) {
1178                 vnic_intr_coalescing_timer_set(&enic->intr[intr], timer);
1179                 cq->cur_rx_coal_timeval = cq->tobe_rx_coal_timeval;
1180         }
1181 }
1182
1183 static void enic_calc_int_moderation(struct enic *enic, struct vnic_rq *rq)
1184 {
1185         struct enic_rx_coal *rx_coal = &enic->rx_coalesce_setting;
1186         struct vnic_cq *cq = &enic->cq[enic_cq_rq(enic, rq->index)];
1187         struct vnic_rx_bytes_counter *pkt_size_counter = &cq->pkt_size_counter;
1188         int index;
1189         u32 timer;
1190         u32 range_start;
1191         u32 traffic;
1192         u64 delta;
1193         ktime_t now = ktime_get();
1194
1195         delta = ktime_us_delta(now, cq->prev_ts);
1196         if (delta < ENIC_AIC_TS_BREAK)
1197                 return;
1198         cq->prev_ts = now;
1199
1200         traffic = pkt_size_counter->large_pkt_bytes_cnt +
1201                   pkt_size_counter->small_pkt_bytes_cnt;
1202         /* The table takes Mbps
1203          * traffic *= 8    => bits
1204          * traffic *= (10^6 / delta)    => bps
1205          * traffic /= 10^6     => Mbps
1206          *
1207          * Combining, traffic *= (8 / delta)
1208          */
1209
1210         traffic <<= 3;
1211         traffic = delta > UINT_MAX ? 0 : traffic / (u32)delta;
1212
1213         for (index = 0; index < ENIC_MAX_COALESCE_TIMERS; index++)
1214                 if (traffic < mod_table[index].rx_rate)
1215                         break;
1216         range_start = (pkt_size_counter->small_pkt_bytes_cnt >
1217                        pkt_size_counter->large_pkt_bytes_cnt << 1) ?
1218                       rx_coal->small_pkt_range_start :
1219                       rx_coal->large_pkt_range_start;
1220         timer = range_start + ((rx_coal->range_end - range_start) *
1221                                mod_table[index].range_percent / 100);
1222         /* Damping */
1223         cq->tobe_rx_coal_timeval = (timer + cq->tobe_rx_coal_timeval) >> 1;
1224
1225         pkt_size_counter->large_pkt_bytes_cnt = 0;
1226         pkt_size_counter->small_pkt_bytes_cnt = 0;
1227 }
1228
1229 #ifdef CONFIG_RFS_ACCEL
1230 static void enic_free_rx_cpu_rmap(struct enic *enic)
1231 {
1232         free_irq_cpu_rmap(enic->netdev->rx_cpu_rmap);
1233         enic->netdev->rx_cpu_rmap = NULL;
1234 }
1235
1236 static void enic_set_rx_cpu_rmap(struct enic *enic)
1237 {
1238         int i, res;
1239
1240         if (vnic_dev_get_intr_mode(enic->vdev) == VNIC_DEV_INTR_MODE_MSIX) {
1241                 enic->netdev->rx_cpu_rmap = alloc_irq_cpu_rmap(enic->rq_count);
1242                 if (unlikely(!enic->netdev->rx_cpu_rmap))
1243                         return;
1244                 for (i = 0; i < enic->rq_count; i++) {
1245                         res = irq_cpu_rmap_add(enic->netdev->rx_cpu_rmap,
1246                                                enic->msix_entry[i].vector);
1247                         if (unlikely(res)) {
1248                                 enic_free_rx_cpu_rmap(enic);
1249                                 return;
1250                         }
1251                 }
1252         }
1253 }
1254
1255 #else
1256
1257 static void enic_free_rx_cpu_rmap(struct enic *enic)
1258 {
1259 }
1260
1261 static void enic_set_rx_cpu_rmap(struct enic *enic)
1262 {
1263 }
1264
1265 #endif /* CONFIG_RFS_ACCEL */
1266
1267 #ifdef CONFIG_NET_RX_BUSY_POLL
1268 int enic_busy_poll(struct napi_struct *napi)
1269 {
1270         struct net_device *netdev = napi->dev;
1271         struct enic *enic = netdev_priv(netdev);
1272         unsigned int rq = (napi - &enic->napi[0]);
1273         unsigned int cq = enic_cq_rq(enic, rq);
1274         unsigned int intr = enic_msix_rq_intr(enic, rq);
1275         unsigned int work_to_do = -1; /* clean all pkts possible */
1276         unsigned int work_done;
1277
1278         if (!enic_poll_lock_poll(&enic->rq[rq]))
1279                 return LL_FLUSH_BUSY;
1280         work_done = vnic_cq_service(&enic->cq[cq], work_to_do,
1281                                     enic_rq_service, NULL);
1282
1283         if (work_done > 0)
1284                 vnic_intr_return_credits(&enic->intr[intr],
1285                                          work_done, 0, 0);
1286         vnic_rq_fill(&enic->rq[rq], enic_rq_alloc_buf);
1287         if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce)
1288                 enic_calc_int_moderation(enic, &enic->rq[rq]);
1289         enic_poll_unlock_poll(&enic->rq[rq]);
1290
1291         return work_done;
1292 }
1293 #endif /* CONFIG_NET_RX_BUSY_POLL */
1294
1295 static int enic_poll_msix_wq(struct napi_struct *napi, int budget)
1296 {
1297         struct net_device *netdev = napi->dev;
1298         struct enic *enic = netdev_priv(netdev);
1299         unsigned int wq_index = (napi - &enic->napi[0]) - enic->rq_count;
1300         struct vnic_wq *wq = &enic->wq[wq_index];
1301         unsigned int cq;
1302         unsigned int intr;
1303         unsigned int wq_work_to_do = -1; /* clean all desc possible */
1304         unsigned int wq_work_done;
1305         unsigned int wq_irq;
1306
1307         wq_irq = wq->index;
1308         cq = enic_cq_wq(enic, wq_irq);
1309         intr = enic_msix_wq_intr(enic, wq_irq);
1310         wq_work_done = vnic_cq_service(&enic->cq[cq], wq_work_to_do,
1311                                        enic_wq_service, NULL);
1312
1313         vnic_intr_return_credits(&enic->intr[intr], wq_work_done,
1314                                  0 /* don't unmask intr */,
1315                                  1 /* reset intr timer */);
1316         if (!wq_work_done) {
1317                 napi_complete(napi);
1318                 vnic_intr_unmask(&enic->intr[intr]);
1319         }
1320
1321         return 0;
1322 }
1323
1324 static int enic_poll_msix_rq(struct napi_struct *napi, int budget)
1325 {
1326         struct net_device *netdev = napi->dev;
1327         struct enic *enic = netdev_priv(netdev);
1328         unsigned int rq = (napi - &enic->napi[0]);
1329         unsigned int cq = enic_cq_rq(enic, rq);
1330         unsigned int intr = enic_msix_rq_intr(enic, rq);
1331         unsigned int work_to_do = budget;
1332         unsigned int work_done = 0;
1333         int err;
1334
1335         if (!enic_poll_lock_napi(&enic->rq[rq]))
1336                 return work_done;
1337         /* Service RQ
1338          */
1339
1340         if (budget > 0)
1341                 work_done = vnic_cq_service(&enic->cq[cq],
1342                         work_to_do, enic_rq_service, NULL);
1343
1344         /* Return intr event credits for this polling
1345          * cycle.  An intr event is the completion of a
1346          * RQ packet.
1347          */
1348
1349         if (work_done > 0)
1350                 vnic_intr_return_credits(&enic->intr[intr],
1351                         work_done,
1352                         0 /* don't unmask intr */,
1353                         0 /* don't reset intr timer */);
1354
1355         err = vnic_rq_fill(&enic->rq[rq], enic_rq_alloc_buf);
1356
1357         /* Buffer allocation failed. Stay in polling mode
1358          * so we can try to fill the ring again.
1359          */
1360
1361         if (err)
1362                 work_done = work_to_do;
1363         if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce)
1364                 /* Call the function which refreshes
1365                  * the intr coalescing timer value based on
1366                  * the traffic.  This is supported only in
1367                  * the case of MSI-x mode
1368                  */
1369                 enic_calc_int_moderation(enic, &enic->rq[rq]);
1370
1371         if (work_done < work_to_do) {
1372
1373                 /* Some work done, but not enough to stay in polling,
1374                  * exit polling
1375                  */
1376
1377                 napi_complete(napi);
1378                 if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce)
1379                         enic_set_int_moderation(enic, &enic->rq[rq]);
1380                 vnic_intr_unmask(&enic->intr[intr]);
1381         }
1382         enic_poll_unlock_napi(&enic->rq[rq]);
1383
1384         return work_done;
1385 }
1386
1387 static void enic_notify_timer(unsigned long data)
1388 {
1389         struct enic *enic = (struct enic *)data;
1390
1391         enic_notify_check(enic);
1392
1393         mod_timer(&enic->notify_timer,
1394                 round_jiffies(jiffies + ENIC_NOTIFY_TIMER_PERIOD));
1395 }
1396
1397 static void enic_free_intr(struct enic *enic)
1398 {
1399         struct net_device *netdev = enic->netdev;
1400         unsigned int i;
1401
1402         enic_free_rx_cpu_rmap(enic);
1403         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1404         case VNIC_DEV_INTR_MODE_INTX:
1405                 free_irq(enic->pdev->irq, netdev);
1406                 break;
1407         case VNIC_DEV_INTR_MODE_MSI:
1408                 free_irq(enic->pdev->irq, enic);
1409                 break;
1410         case VNIC_DEV_INTR_MODE_MSIX:
1411                 for (i = 0; i < ARRAY_SIZE(enic->msix); i++)
1412                         if (enic->msix[i].requested)
1413                                 free_irq(enic->msix_entry[i].vector,
1414                                         enic->msix[i].devid);
1415                 break;
1416         default:
1417                 break;
1418         }
1419 }
1420
1421 static int enic_request_intr(struct enic *enic)
1422 {
1423         struct net_device *netdev = enic->netdev;
1424         unsigned int i, intr;
1425         int err = 0;
1426
1427         enic_set_rx_cpu_rmap(enic);
1428         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1429
1430         case VNIC_DEV_INTR_MODE_INTX:
1431
1432                 err = request_irq(enic->pdev->irq, enic_isr_legacy,
1433                         IRQF_SHARED, netdev->name, netdev);
1434                 break;
1435
1436         case VNIC_DEV_INTR_MODE_MSI:
1437
1438                 err = request_irq(enic->pdev->irq, enic_isr_msi,
1439                         0, netdev->name, enic);
1440                 break;
1441
1442         case VNIC_DEV_INTR_MODE_MSIX:
1443
1444                 for (i = 0; i < enic->rq_count; i++) {
1445                         intr = enic_msix_rq_intr(enic, i);
1446                         snprintf(enic->msix[intr].devname,
1447                                 sizeof(enic->msix[intr].devname),
1448                                 "%.11s-rx-%d", netdev->name, i);
1449                         enic->msix[intr].isr = enic_isr_msix;
1450                         enic->msix[intr].devid = &enic->napi[i];
1451                 }
1452
1453                 for (i = 0; i < enic->wq_count; i++) {
1454                         int wq = enic_cq_wq(enic, i);
1455
1456                         intr = enic_msix_wq_intr(enic, i);
1457                         snprintf(enic->msix[intr].devname,
1458                                 sizeof(enic->msix[intr].devname),
1459                                 "%.11s-tx-%d", netdev->name, i);
1460                         enic->msix[intr].isr = enic_isr_msix;
1461                         enic->msix[intr].devid = &enic->napi[wq];
1462                 }
1463
1464                 intr = enic_msix_err_intr(enic);
1465                 snprintf(enic->msix[intr].devname,
1466                         sizeof(enic->msix[intr].devname),
1467                         "%.11s-err", netdev->name);
1468                 enic->msix[intr].isr = enic_isr_msix_err;
1469                 enic->msix[intr].devid = enic;
1470
1471                 intr = enic_msix_notify_intr(enic);
1472                 snprintf(enic->msix[intr].devname,
1473                         sizeof(enic->msix[intr].devname),
1474                         "%.11s-notify", netdev->name);
1475                 enic->msix[intr].isr = enic_isr_msix_notify;
1476                 enic->msix[intr].devid = enic;
1477
1478                 for (i = 0; i < ARRAY_SIZE(enic->msix); i++)
1479                         enic->msix[i].requested = 0;
1480
1481                 for (i = 0; i < enic->intr_count; i++) {
1482                         err = request_irq(enic->msix_entry[i].vector,
1483                                 enic->msix[i].isr, 0,
1484                                 enic->msix[i].devname,
1485                                 enic->msix[i].devid);
1486                         if (err) {
1487                                 enic_free_intr(enic);
1488                                 break;
1489                         }
1490                         enic->msix[i].requested = 1;
1491                 }
1492
1493                 break;
1494
1495         default:
1496                 break;
1497         }
1498
1499         return err;
1500 }
1501
1502 static void enic_synchronize_irqs(struct enic *enic)
1503 {
1504         unsigned int i;
1505
1506         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1507         case VNIC_DEV_INTR_MODE_INTX:
1508         case VNIC_DEV_INTR_MODE_MSI:
1509                 synchronize_irq(enic->pdev->irq);
1510                 break;
1511         case VNIC_DEV_INTR_MODE_MSIX:
1512                 for (i = 0; i < enic->intr_count; i++)
1513                         synchronize_irq(enic->msix_entry[i].vector);
1514                 break;
1515         default:
1516                 break;
1517         }
1518 }
1519
1520 static void enic_set_rx_coal_setting(struct enic *enic)
1521 {
1522         unsigned int speed;
1523         int index = -1;
1524         struct enic_rx_coal *rx_coal = &enic->rx_coalesce_setting;
1525
1526         /* If intr mode is not MSIX, do not do adaptive coalescing */
1527         if (VNIC_DEV_INTR_MODE_MSIX != vnic_dev_get_intr_mode(enic->vdev)) {
1528                 netdev_info(enic->netdev, "INTR mode is not MSIX, Not initializing adaptive coalescing");
1529                 return;
1530         }
1531
1532         /* 1. Read the link speed from fw
1533          * 2. Pick the default range for the speed
1534          * 3. Update it in enic->rx_coalesce_setting
1535          */
1536         speed = vnic_dev_port_speed(enic->vdev);
1537         if (ENIC_LINK_SPEED_10G < speed)
1538                 index = ENIC_LINK_40G_INDEX;
1539         else if (ENIC_LINK_SPEED_4G < speed)
1540                 index = ENIC_LINK_10G_INDEX;
1541         else
1542                 index = ENIC_LINK_4G_INDEX;
1543
1544         rx_coal->small_pkt_range_start = mod_range[index].small_pkt_range_start;
1545         rx_coal->large_pkt_range_start = mod_range[index].large_pkt_range_start;
1546         rx_coal->range_end = ENIC_RX_COALESCE_RANGE_END;
1547
1548         /* Start with the value provided by UCSM */
1549         for (index = 0; index < enic->rq_count; index++)
1550                 enic->cq[index].cur_rx_coal_timeval =
1551                                 enic->config.intr_timer_usec;
1552
1553         rx_coal->use_adaptive_rx_coalesce = 1;
1554 }
1555
1556 static int enic_dev_notify_set(struct enic *enic)
1557 {
1558         int err;
1559
1560         spin_lock_bh(&enic->devcmd_lock);
1561         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1562         case VNIC_DEV_INTR_MODE_INTX:
1563                 err = vnic_dev_notify_set(enic->vdev,
1564                         enic_legacy_notify_intr());
1565                 break;
1566         case VNIC_DEV_INTR_MODE_MSIX:
1567                 err = vnic_dev_notify_set(enic->vdev,
1568                         enic_msix_notify_intr(enic));
1569                 break;
1570         default:
1571                 err = vnic_dev_notify_set(enic->vdev, -1 /* no intr */);
1572                 break;
1573         }
1574         spin_unlock_bh(&enic->devcmd_lock);
1575
1576         return err;
1577 }
1578
1579 static void enic_notify_timer_start(struct enic *enic)
1580 {
1581         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1582         case VNIC_DEV_INTR_MODE_MSI:
1583                 mod_timer(&enic->notify_timer, jiffies);
1584                 break;
1585         default:
1586                 /* Using intr for notification for INTx/MSI-X */
1587                 break;
1588         }
1589 }
1590
1591 /* rtnl lock is held, process context */
1592 static int enic_open(struct net_device *netdev)
1593 {
1594         struct enic *enic = netdev_priv(netdev);
1595         unsigned int i;
1596         int err;
1597
1598         err = enic_request_intr(enic);
1599         if (err) {
1600                 netdev_err(netdev, "Unable to request irq.\n");
1601                 return err;
1602         }
1603
1604         err = enic_dev_notify_set(enic);
1605         if (err) {
1606                 netdev_err(netdev,
1607                         "Failed to alloc notify buffer, aborting.\n");
1608                 goto err_out_free_intr;
1609         }
1610
1611         for (i = 0; i < enic->rq_count; i++) {
1612                 vnic_rq_fill(&enic->rq[i], enic_rq_alloc_buf);
1613                 /* Need at least one buffer on ring to get going */
1614                 if (vnic_rq_desc_used(&enic->rq[i]) == 0) {
1615                         netdev_err(netdev, "Unable to alloc receive buffers\n");
1616                         err = -ENOMEM;
1617                         goto err_out_notify_unset;
1618                 }
1619         }
1620
1621         for (i = 0; i < enic->wq_count; i++)
1622                 vnic_wq_enable(&enic->wq[i]);
1623         for (i = 0; i < enic->rq_count; i++)
1624                 vnic_rq_enable(&enic->rq[i]);
1625
1626         if (!enic_is_dynamic(enic) && !enic_is_sriov_vf(enic))
1627                 enic_dev_add_station_addr(enic);
1628
1629         enic_set_rx_mode(netdev);
1630
1631         netif_tx_wake_all_queues(netdev);
1632
1633         for (i = 0; i < enic->rq_count; i++) {
1634                 enic_busy_poll_init_lock(&enic->rq[i]);
1635                 napi_enable(&enic->napi[i]);
1636         }
1637         if (vnic_dev_get_intr_mode(enic->vdev) == VNIC_DEV_INTR_MODE_MSIX)
1638                 for (i = 0; i < enic->wq_count; i++)
1639                         napi_enable(&enic->napi[enic_cq_wq(enic, i)]);
1640         enic_dev_enable(enic);
1641
1642         for (i = 0; i < enic->intr_count; i++)
1643                 vnic_intr_unmask(&enic->intr[i]);
1644
1645         enic_notify_timer_start(enic);
1646         enic_rfs_flw_tbl_init(enic);
1647
1648         return 0;
1649
1650 err_out_notify_unset:
1651         enic_dev_notify_unset(enic);
1652 err_out_free_intr:
1653         enic_free_intr(enic);
1654
1655         return err;
1656 }
1657
1658 /* rtnl lock is held, process context */
1659 static int enic_stop(struct net_device *netdev)
1660 {
1661         struct enic *enic = netdev_priv(netdev);
1662         unsigned int i;
1663         int err;
1664
1665         for (i = 0; i < enic->intr_count; i++) {
1666                 vnic_intr_mask(&enic->intr[i]);
1667                 (void)vnic_intr_masked(&enic->intr[i]); /* flush write */
1668         }
1669
1670         enic_synchronize_irqs(enic);
1671
1672         del_timer_sync(&enic->notify_timer);
1673         enic_rfs_flw_tbl_free(enic);
1674
1675         enic_dev_disable(enic);
1676
1677         local_bh_disable();
1678         for (i = 0; i < enic->rq_count; i++) {
1679                 napi_disable(&enic->napi[i]);
1680                 while (!enic_poll_lock_napi(&enic->rq[i]))
1681                         mdelay(1);
1682         }
1683         local_bh_enable();
1684
1685         netif_carrier_off(netdev);
1686         netif_tx_disable(netdev);
1687         if (vnic_dev_get_intr_mode(enic->vdev) == VNIC_DEV_INTR_MODE_MSIX)
1688                 for (i = 0; i < enic->wq_count; i++)
1689                         napi_disable(&enic->napi[enic_cq_wq(enic, i)]);
1690
1691         if (!enic_is_dynamic(enic) && !enic_is_sriov_vf(enic))
1692                 enic_dev_del_station_addr(enic);
1693
1694         for (i = 0; i < enic->wq_count; i++) {
1695                 err = vnic_wq_disable(&enic->wq[i]);
1696                 if (err)
1697                         return err;
1698         }
1699         for (i = 0; i < enic->rq_count; i++) {
1700                 err = vnic_rq_disable(&enic->rq[i]);
1701                 if (err)
1702                         return err;
1703         }
1704
1705         enic_dev_notify_unset(enic);
1706         enic_free_intr(enic);
1707
1708         for (i = 0; i < enic->wq_count; i++)
1709                 vnic_wq_clean(&enic->wq[i], enic_free_wq_buf);
1710         for (i = 0; i < enic->rq_count; i++)
1711                 vnic_rq_clean(&enic->rq[i], enic_free_rq_buf);
1712         for (i = 0; i < enic->cq_count; i++)
1713                 vnic_cq_clean(&enic->cq[i]);
1714         for (i = 0; i < enic->intr_count; i++)
1715                 vnic_intr_clean(&enic->intr[i]);
1716
1717         return 0;
1718 }
1719
1720 static int enic_change_mtu(struct net_device *netdev, int new_mtu)
1721 {
1722         struct enic *enic = netdev_priv(netdev);
1723         int running = netif_running(netdev);
1724
1725         if (new_mtu < ENIC_MIN_MTU || new_mtu > ENIC_MAX_MTU)
1726                 return -EINVAL;
1727
1728         if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic))
1729                 return -EOPNOTSUPP;
1730
1731         if (running)
1732                 enic_stop(netdev);
1733
1734         netdev->mtu = new_mtu;
1735
1736         if (netdev->mtu > enic->port_mtu)
1737                 netdev_warn(netdev,
1738                         "interface MTU (%d) set higher than port MTU (%d)\n",
1739                         netdev->mtu, enic->port_mtu);
1740
1741         if (running)
1742                 enic_open(netdev);
1743
1744         return 0;
1745 }
1746
1747 static void enic_change_mtu_work(struct work_struct *work)
1748 {
1749         struct enic *enic = container_of(work, struct enic, change_mtu_work);
1750         struct net_device *netdev = enic->netdev;
1751         int new_mtu = vnic_dev_mtu(enic->vdev);
1752         int err;
1753         unsigned int i;
1754
1755         new_mtu = max_t(int, ENIC_MIN_MTU, min_t(int, ENIC_MAX_MTU, new_mtu));
1756
1757         rtnl_lock();
1758
1759         /* Stop RQ */
1760         del_timer_sync(&enic->notify_timer);
1761
1762         for (i = 0; i < enic->rq_count; i++)
1763                 napi_disable(&enic->napi[i]);
1764
1765         vnic_intr_mask(&enic->intr[0]);
1766         enic_synchronize_irqs(enic);
1767         err = vnic_rq_disable(&enic->rq[0]);
1768         if (err) {
1769                 rtnl_unlock();
1770                 netdev_err(netdev, "Unable to disable RQ.\n");
1771                 return;
1772         }
1773         vnic_rq_clean(&enic->rq[0], enic_free_rq_buf);
1774         vnic_cq_clean(&enic->cq[0]);
1775         vnic_intr_clean(&enic->intr[0]);
1776
1777         /* Fill RQ with new_mtu-sized buffers */
1778         netdev->mtu = new_mtu;
1779         vnic_rq_fill(&enic->rq[0], enic_rq_alloc_buf);
1780         /* Need at least one buffer on ring to get going */
1781         if (vnic_rq_desc_used(&enic->rq[0]) == 0) {
1782                 rtnl_unlock();
1783                 netdev_err(netdev, "Unable to alloc receive buffers.\n");
1784                 return;
1785         }
1786
1787         /* Start RQ */
1788         vnic_rq_enable(&enic->rq[0]);
1789         napi_enable(&enic->napi[0]);
1790         vnic_intr_unmask(&enic->intr[0]);
1791         enic_notify_timer_start(enic);
1792
1793         rtnl_unlock();
1794
1795         netdev_info(netdev, "interface MTU set as %d\n", netdev->mtu);
1796 }
1797
1798 #ifdef CONFIG_NET_POLL_CONTROLLER
1799 static void enic_poll_controller(struct net_device *netdev)
1800 {
1801         struct enic *enic = netdev_priv(netdev);
1802         struct vnic_dev *vdev = enic->vdev;
1803         unsigned int i, intr;
1804
1805         switch (vnic_dev_get_intr_mode(vdev)) {
1806         case VNIC_DEV_INTR_MODE_MSIX:
1807                 for (i = 0; i < enic->rq_count; i++) {
1808                         intr = enic_msix_rq_intr(enic, i);
1809                         enic_isr_msix(enic->msix_entry[intr].vector,
1810                                       &enic->napi[i]);
1811                 }
1812
1813                 for (i = 0; i < enic->wq_count; i++) {
1814                         intr = enic_msix_wq_intr(enic, i);
1815                         enic_isr_msix(enic->msix_entry[intr].vector,
1816                                       &enic->napi[enic_cq_wq(enic, i)]);
1817                 }
1818
1819                 break;
1820         case VNIC_DEV_INTR_MODE_MSI:
1821                 enic_isr_msi(enic->pdev->irq, enic);
1822                 break;
1823         case VNIC_DEV_INTR_MODE_INTX:
1824                 enic_isr_legacy(enic->pdev->irq, netdev);
1825                 break;
1826         default:
1827                 break;
1828         }
1829 }
1830 #endif
1831
1832 static int enic_dev_wait(struct vnic_dev *vdev,
1833         int (*start)(struct vnic_dev *, int),
1834         int (*finished)(struct vnic_dev *, int *),
1835         int arg)
1836 {
1837         unsigned long time;
1838         int done;
1839         int err;
1840
1841         BUG_ON(in_interrupt());
1842
1843         err = start(vdev, arg);
1844         if (err)
1845                 return err;
1846
1847         /* Wait for func to complete...2 seconds max
1848          */
1849
1850         time = jiffies + (HZ * 2);
1851         do {
1852
1853                 err = finished(vdev, &done);
1854                 if (err)
1855                         return err;
1856
1857                 if (done)
1858                         return 0;
1859
1860                 schedule_timeout_uninterruptible(HZ / 10);
1861
1862         } while (time_after(time, jiffies));
1863
1864         return -ETIMEDOUT;
1865 }
1866
1867 static int enic_dev_open(struct enic *enic)
1868 {
1869         int err;
1870
1871         err = enic_dev_wait(enic->vdev, vnic_dev_open,
1872                 vnic_dev_open_done, 0);
1873         if (err)
1874                 dev_err(enic_get_dev(enic), "vNIC device open failed, err %d\n",
1875                         err);
1876
1877         return err;
1878 }
1879
1880 static int enic_dev_hang_reset(struct enic *enic)
1881 {
1882         int err;
1883
1884         err = enic_dev_wait(enic->vdev, vnic_dev_hang_reset,
1885                 vnic_dev_hang_reset_done, 0);
1886         if (err)
1887                 netdev_err(enic->netdev, "vNIC hang reset failed, err %d\n",
1888                         err);
1889
1890         return err;
1891 }
1892
1893 static int enic_set_rsskey(struct enic *enic)
1894 {
1895         dma_addr_t rss_key_buf_pa;
1896         union vnic_rss_key *rss_key_buf_va = NULL;
1897         union vnic_rss_key rss_key = {
1898                 .key[0].b = {85, 67, 83, 97, 119, 101, 115, 111, 109, 101},
1899                 .key[1].b = {80, 65, 76, 79, 117, 110, 105, 113, 117, 101},
1900                 .key[2].b = {76, 73, 78, 85, 88, 114, 111, 99, 107, 115},
1901                 .key[3].b = {69, 78, 73, 67, 105, 115, 99, 111, 111, 108},
1902         };
1903         int err;
1904
1905         rss_key_buf_va = pci_alloc_consistent(enic->pdev,
1906                 sizeof(union vnic_rss_key), &rss_key_buf_pa);
1907         if (!rss_key_buf_va)
1908                 return -ENOMEM;
1909
1910         memcpy(rss_key_buf_va, &rss_key, sizeof(union vnic_rss_key));
1911
1912         spin_lock_bh(&enic->devcmd_lock);
1913         err = enic_set_rss_key(enic,
1914                 rss_key_buf_pa,
1915                 sizeof(union vnic_rss_key));
1916         spin_unlock_bh(&enic->devcmd_lock);
1917
1918         pci_free_consistent(enic->pdev, sizeof(union vnic_rss_key),
1919                 rss_key_buf_va, rss_key_buf_pa);
1920
1921         return err;
1922 }
1923
1924 static int enic_set_rsscpu(struct enic *enic, u8 rss_hash_bits)
1925 {
1926         dma_addr_t rss_cpu_buf_pa;
1927         union vnic_rss_cpu *rss_cpu_buf_va = NULL;
1928         unsigned int i;
1929         int err;
1930
1931         rss_cpu_buf_va = pci_alloc_consistent(enic->pdev,
1932                 sizeof(union vnic_rss_cpu), &rss_cpu_buf_pa);
1933         if (!rss_cpu_buf_va)
1934                 return -ENOMEM;
1935
1936         for (i = 0; i < (1 << rss_hash_bits); i++)
1937                 (*rss_cpu_buf_va).cpu[i/4].b[i%4] = i % enic->rq_count;
1938
1939         spin_lock_bh(&enic->devcmd_lock);
1940         err = enic_set_rss_cpu(enic,
1941                 rss_cpu_buf_pa,
1942                 sizeof(union vnic_rss_cpu));
1943         spin_unlock_bh(&enic->devcmd_lock);
1944
1945         pci_free_consistent(enic->pdev, sizeof(union vnic_rss_cpu),
1946                 rss_cpu_buf_va, rss_cpu_buf_pa);
1947
1948         return err;
1949 }
1950
1951 static int enic_set_niccfg(struct enic *enic, u8 rss_default_cpu,
1952         u8 rss_hash_type, u8 rss_hash_bits, u8 rss_base_cpu, u8 rss_enable)
1953 {
1954         const u8 tso_ipid_split_en = 0;
1955         const u8 ig_vlan_strip_en = 1;
1956         int err;
1957
1958         /* Enable VLAN tag stripping.
1959         */
1960
1961         spin_lock_bh(&enic->devcmd_lock);
1962         err = enic_set_nic_cfg(enic,
1963                 rss_default_cpu, rss_hash_type,
1964                 rss_hash_bits, rss_base_cpu,
1965                 rss_enable, tso_ipid_split_en,
1966                 ig_vlan_strip_en);
1967         spin_unlock_bh(&enic->devcmd_lock);
1968
1969         return err;
1970 }
1971
1972 static int enic_set_rss_nic_cfg(struct enic *enic)
1973 {
1974         struct device *dev = enic_get_dev(enic);
1975         const u8 rss_default_cpu = 0;
1976         const u8 rss_hash_type = NIC_CFG_RSS_HASH_TYPE_IPV4 |
1977                 NIC_CFG_RSS_HASH_TYPE_TCP_IPV4 |
1978                 NIC_CFG_RSS_HASH_TYPE_IPV6 |
1979                 NIC_CFG_RSS_HASH_TYPE_TCP_IPV6;
1980         const u8 rss_hash_bits = 7;
1981         const u8 rss_base_cpu = 0;
1982         u8 rss_enable = ENIC_SETTING(enic, RSS) && (enic->rq_count > 1);
1983
1984         if (rss_enable) {
1985                 if (!enic_set_rsskey(enic)) {
1986                         if (enic_set_rsscpu(enic, rss_hash_bits)) {
1987                                 rss_enable = 0;
1988                                 dev_warn(dev, "RSS disabled, "
1989                                         "Failed to set RSS cpu indirection table.");
1990                         }
1991                 } else {
1992                         rss_enable = 0;
1993                         dev_warn(dev, "RSS disabled, Failed to set RSS key.\n");
1994                 }
1995         }
1996
1997         return enic_set_niccfg(enic, rss_default_cpu, rss_hash_type,
1998                 rss_hash_bits, rss_base_cpu, rss_enable);
1999 }
2000
2001 static void enic_reset(struct work_struct *work)
2002 {
2003         struct enic *enic = container_of(work, struct enic, reset);
2004
2005         if (!netif_running(enic->netdev))
2006                 return;
2007
2008         rtnl_lock();
2009
2010         spin_lock(&enic->enic_api_lock);
2011         enic_dev_hang_notify(enic);
2012         enic_stop(enic->netdev);
2013         enic_dev_hang_reset(enic);
2014         enic_reset_addr_lists(enic);
2015         enic_init_vnic_resources(enic);
2016         enic_set_rss_nic_cfg(enic);
2017         enic_dev_set_ig_vlan_rewrite_mode(enic);
2018         enic_open(enic->netdev);
2019         spin_unlock(&enic->enic_api_lock);
2020         call_netdevice_notifiers(NETDEV_REBOOT, enic->netdev);
2021
2022         rtnl_unlock();
2023 }
2024
2025 static int enic_set_intr_mode(struct enic *enic)
2026 {
2027         unsigned int n = min_t(unsigned int, enic->rq_count, ENIC_RQ_MAX);
2028         unsigned int m = min_t(unsigned int, enic->wq_count, ENIC_WQ_MAX);
2029         unsigned int i;
2030
2031         /* Set interrupt mode (INTx, MSI, MSI-X) depending
2032          * on system capabilities.
2033          *
2034          * Try MSI-X first
2035          *
2036          * We need n RQs, m WQs, n+m CQs, and n+m+2 INTRs
2037          * (the second to last INTR is used for WQ/RQ errors)
2038          * (the last INTR is used for notifications)
2039          */
2040
2041         BUG_ON(ARRAY_SIZE(enic->msix_entry) < n + m + 2);
2042         for (i = 0; i < n + m + 2; i++)
2043                 enic->msix_entry[i].entry = i;
2044
2045         /* Use multiple RQs if RSS is enabled
2046          */
2047
2048         if (ENIC_SETTING(enic, RSS) &&
2049             enic->config.intr_mode < 1 &&
2050             enic->rq_count >= n &&
2051             enic->wq_count >= m &&
2052             enic->cq_count >= n + m &&
2053             enic->intr_count >= n + m + 2) {
2054
2055                 if (pci_enable_msix_range(enic->pdev, enic->msix_entry,
2056                                           n + m + 2, n + m + 2) > 0) {
2057
2058                         enic->rq_count = n;
2059                         enic->wq_count = m;
2060                         enic->cq_count = n + m;
2061                         enic->intr_count = n + m + 2;
2062
2063                         vnic_dev_set_intr_mode(enic->vdev,
2064                                 VNIC_DEV_INTR_MODE_MSIX);
2065
2066                         return 0;
2067                 }
2068         }
2069
2070         if (enic->config.intr_mode < 1 &&
2071             enic->rq_count >= 1 &&
2072             enic->wq_count >= m &&
2073             enic->cq_count >= 1 + m &&
2074             enic->intr_count >= 1 + m + 2) {
2075                 if (pci_enable_msix_range(enic->pdev, enic->msix_entry,
2076                                           1 + m + 2, 1 + m + 2) > 0) {
2077
2078                         enic->rq_count = 1;
2079                         enic->wq_count = m;
2080                         enic->cq_count = 1 + m;
2081                         enic->intr_count = 1 + m + 2;
2082
2083                         vnic_dev_set_intr_mode(enic->vdev,
2084                                 VNIC_DEV_INTR_MODE_MSIX);
2085
2086                         return 0;
2087                 }
2088         }
2089
2090         /* Next try MSI
2091          *
2092          * We need 1 RQ, 1 WQ, 2 CQs, and 1 INTR
2093          */
2094
2095         if (enic->config.intr_mode < 2 &&
2096             enic->rq_count >= 1 &&
2097             enic->wq_count >= 1 &&
2098             enic->cq_count >= 2 &&
2099             enic->intr_count >= 1 &&
2100             !pci_enable_msi(enic->pdev)) {
2101
2102                 enic->rq_count = 1;
2103                 enic->wq_count = 1;
2104                 enic->cq_count = 2;
2105                 enic->intr_count = 1;
2106
2107                 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_MSI);
2108
2109                 return 0;
2110         }
2111
2112         /* Next try INTx
2113          *
2114          * We need 1 RQ, 1 WQ, 2 CQs, and 3 INTRs
2115          * (the first INTR is used for WQ/RQ)
2116          * (the second INTR is used for WQ/RQ errors)
2117          * (the last INTR is used for notifications)
2118          */
2119
2120         if (enic->config.intr_mode < 3 &&
2121             enic->rq_count >= 1 &&
2122             enic->wq_count >= 1 &&
2123             enic->cq_count >= 2 &&
2124             enic->intr_count >= 3) {
2125
2126                 enic->rq_count = 1;
2127                 enic->wq_count = 1;
2128                 enic->cq_count = 2;
2129                 enic->intr_count = 3;
2130
2131                 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_INTX);
2132
2133                 return 0;
2134         }
2135
2136         vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN);
2137
2138         return -EINVAL;
2139 }
2140
2141 static void enic_clear_intr_mode(struct enic *enic)
2142 {
2143         switch (vnic_dev_get_intr_mode(enic->vdev)) {
2144         case VNIC_DEV_INTR_MODE_MSIX:
2145                 pci_disable_msix(enic->pdev);
2146                 break;
2147         case VNIC_DEV_INTR_MODE_MSI:
2148                 pci_disable_msi(enic->pdev);
2149                 break;
2150         default:
2151                 break;
2152         }
2153
2154         vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN);
2155 }
2156
2157 static const struct net_device_ops enic_netdev_dynamic_ops = {
2158         .ndo_open               = enic_open,
2159         .ndo_stop               = enic_stop,
2160         .ndo_start_xmit         = enic_hard_start_xmit,
2161         .ndo_get_stats64        = enic_get_stats,
2162         .ndo_validate_addr      = eth_validate_addr,
2163         .ndo_set_rx_mode        = enic_set_rx_mode,
2164         .ndo_set_mac_address    = enic_set_mac_address_dynamic,
2165         .ndo_change_mtu         = enic_change_mtu,
2166         .ndo_vlan_rx_add_vid    = enic_vlan_rx_add_vid,
2167         .ndo_vlan_rx_kill_vid   = enic_vlan_rx_kill_vid,
2168         .ndo_tx_timeout         = enic_tx_timeout,
2169         .ndo_set_vf_port        = enic_set_vf_port,
2170         .ndo_get_vf_port        = enic_get_vf_port,
2171         .ndo_set_vf_mac         = enic_set_vf_mac,
2172 #ifdef CONFIG_NET_POLL_CONTROLLER
2173         .ndo_poll_controller    = enic_poll_controller,
2174 #endif
2175 #ifdef CONFIG_RFS_ACCEL
2176         .ndo_rx_flow_steer      = enic_rx_flow_steer,
2177 #endif
2178 #ifdef CONFIG_NET_RX_BUSY_POLL
2179         .ndo_busy_poll          = enic_busy_poll,
2180 #endif
2181 };
2182
2183 static const struct net_device_ops enic_netdev_ops = {
2184         .ndo_open               = enic_open,
2185         .ndo_stop               = enic_stop,
2186         .ndo_start_xmit         = enic_hard_start_xmit,
2187         .ndo_get_stats64        = enic_get_stats,
2188         .ndo_validate_addr      = eth_validate_addr,
2189         .ndo_set_mac_address    = enic_set_mac_address,
2190         .ndo_set_rx_mode        = enic_set_rx_mode,
2191         .ndo_change_mtu         = enic_change_mtu,
2192         .ndo_vlan_rx_add_vid    = enic_vlan_rx_add_vid,
2193         .ndo_vlan_rx_kill_vid   = enic_vlan_rx_kill_vid,
2194         .ndo_tx_timeout         = enic_tx_timeout,
2195         .ndo_set_vf_port        = enic_set_vf_port,
2196         .ndo_get_vf_port        = enic_get_vf_port,
2197         .ndo_set_vf_mac         = enic_set_vf_mac,
2198 #ifdef CONFIG_NET_POLL_CONTROLLER
2199         .ndo_poll_controller    = enic_poll_controller,
2200 #endif
2201 #ifdef CONFIG_RFS_ACCEL
2202         .ndo_rx_flow_steer      = enic_rx_flow_steer,
2203 #endif
2204 #ifdef CONFIG_NET_RX_BUSY_POLL
2205         .ndo_busy_poll          = enic_busy_poll,
2206 #endif
2207 };
2208
2209 static void enic_dev_deinit(struct enic *enic)
2210 {
2211         unsigned int i;
2212
2213         for (i = 0; i < enic->rq_count; i++) {
2214                 napi_hash_del(&enic->napi[i]);
2215                 netif_napi_del(&enic->napi[i]);
2216         }
2217         if (vnic_dev_get_intr_mode(enic->vdev) == VNIC_DEV_INTR_MODE_MSIX)
2218                 for (i = 0; i < enic->wq_count; i++)
2219                         netif_napi_del(&enic->napi[enic_cq_wq(enic, i)]);
2220
2221         enic_free_vnic_resources(enic);
2222         enic_clear_intr_mode(enic);
2223 }
2224
2225 static int enic_dev_init(struct enic *enic)
2226 {
2227         struct device *dev = enic_get_dev(enic);
2228         struct net_device *netdev = enic->netdev;
2229         unsigned int i;
2230         int err;
2231
2232         /* Get interrupt coalesce timer info */
2233         err = enic_dev_intr_coal_timer_info(enic);
2234         if (err) {
2235                 dev_warn(dev, "Using default conversion factor for "
2236                         "interrupt coalesce timer\n");
2237                 vnic_dev_intr_coal_timer_info_default(enic->vdev);
2238         }
2239
2240         /* Get vNIC configuration
2241          */
2242
2243         err = enic_get_vnic_config(enic);
2244         if (err) {
2245                 dev_err(dev, "Get vNIC configuration failed, aborting\n");
2246                 return err;
2247         }
2248
2249         /* Get available resource counts
2250          */
2251
2252         enic_get_res_counts(enic);
2253
2254         /* Set interrupt mode based on resource counts and system
2255          * capabilities
2256          */
2257
2258         err = enic_set_intr_mode(enic);
2259         if (err) {
2260                 dev_err(dev, "Failed to set intr mode based on resource "
2261                         "counts and system capabilities, aborting\n");
2262                 return err;
2263         }
2264
2265         /* Allocate and configure vNIC resources
2266          */
2267
2268         err = enic_alloc_vnic_resources(enic);
2269         if (err) {
2270                 dev_err(dev, "Failed to alloc vNIC resources, aborting\n");
2271                 goto err_out_free_vnic_resources;
2272         }
2273
2274         enic_init_vnic_resources(enic);
2275
2276         err = enic_set_rss_nic_cfg(enic);
2277         if (err) {
2278                 dev_err(dev, "Failed to config nic, aborting\n");
2279                 goto err_out_free_vnic_resources;
2280         }
2281
2282         switch (vnic_dev_get_intr_mode(enic->vdev)) {
2283         default:
2284                 netif_napi_add(netdev, &enic->napi[0], enic_poll, 64);
2285                 napi_hash_add(&enic->napi[0]);
2286                 break;
2287         case VNIC_DEV_INTR_MODE_MSIX:
2288                 for (i = 0; i < enic->rq_count; i++) {
2289                         netif_napi_add(netdev, &enic->napi[i],
2290                                 enic_poll_msix_rq, NAPI_POLL_WEIGHT);
2291                         napi_hash_add(&enic->napi[i]);
2292                 }
2293                 for (i = 0; i < enic->wq_count; i++)
2294                         netif_napi_add(netdev, &enic->napi[enic_cq_wq(enic, i)],
2295                                        enic_poll_msix_wq, NAPI_POLL_WEIGHT);
2296                 break;
2297         }
2298
2299         return 0;
2300
2301 err_out_free_vnic_resources:
2302         enic_clear_intr_mode(enic);
2303         enic_free_vnic_resources(enic);
2304
2305         return err;
2306 }
2307
2308 static void enic_iounmap(struct enic *enic)
2309 {
2310         unsigned int i;
2311
2312         for (i = 0; i < ARRAY_SIZE(enic->bar); i++)
2313                 if (enic->bar[i].vaddr)
2314                         iounmap(enic->bar[i].vaddr);
2315 }
2316
2317 static int enic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2318 {
2319         struct device *dev = &pdev->dev;
2320         struct net_device *netdev;
2321         struct enic *enic;
2322         int using_dac = 0;
2323         unsigned int i;
2324         int err;
2325 #ifdef CONFIG_PCI_IOV
2326         int pos = 0;
2327 #endif
2328         int num_pps = 1;
2329
2330         /* Allocate net device structure and initialize.  Private
2331          * instance data is initialized to zero.
2332          */
2333
2334         netdev = alloc_etherdev_mqs(sizeof(struct enic),
2335                                     ENIC_RQ_MAX, ENIC_WQ_MAX);
2336         if (!netdev)
2337                 return -ENOMEM;
2338
2339         pci_set_drvdata(pdev, netdev);
2340
2341         SET_NETDEV_DEV(netdev, &pdev->dev);
2342
2343         enic = netdev_priv(netdev);
2344         enic->netdev = netdev;
2345         enic->pdev = pdev;
2346
2347         /* Setup PCI resources
2348          */
2349
2350         err = pci_enable_device_mem(pdev);
2351         if (err) {
2352                 dev_err(dev, "Cannot enable PCI device, aborting\n");
2353                 goto err_out_free_netdev;
2354         }
2355
2356         err = pci_request_regions(pdev, DRV_NAME);
2357         if (err) {
2358                 dev_err(dev, "Cannot request PCI regions, aborting\n");
2359                 goto err_out_disable_device;
2360         }
2361
2362         pci_set_master(pdev);
2363
2364         /* Query PCI controller on system for DMA addressing
2365          * limitation for the device.  Try 64-bit first, and
2366          * fail to 32-bit.
2367          */
2368
2369         err = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
2370         if (err) {
2371                 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
2372                 if (err) {
2373                         dev_err(dev, "No usable DMA configuration, aborting\n");
2374                         goto err_out_release_regions;
2375                 }
2376                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
2377                 if (err) {
2378                         dev_err(dev, "Unable to obtain %u-bit DMA "
2379                                 "for consistent allocations, aborting\n", 32);
2380                         goto err_out_release_regions;
2381                 }
2382         } else {
2383                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
2384                 if (err) {
2385                         dev_err(dev, "Unable to obtain %u-bit DMA "
2386                                 "for consistent allocations, aborting\n", 64);
2387                         goto err_out_release_regions;
2388                 }
2389                 using_dac = 1;
2390         }
2391
2392         /* Map vNIC resources from BAR0-5
2393          */
2394
2395         for (i = 0; i < ARRAY_SIZE(enic->bar); i++) {
2396                 if (!(pci_resource_flags(pdev, i) & IORESOURCE_MEM))
2397                         continue;
2398                 enic->bar[i].len = pci_resource_len(pdev, i);
2399                 enic->bar[i].vaddr = pci_iomap(pdev, i, enic->bar[i].len);
2400                 if (!enic->bar[i].vaddr) {
2401                         dev_err(dev, "Cannot memory-map BAR %d, aborting\n", i);
2402                         err = -ENODEV;
2403                         goto err_out_iounmap;
2404                 }
2405                 enic->bar[i].bus_addr = pci_resource_start(pdev, i);
2406         }
2407
2408         /* Register vNIC device
2409          */
2410
2411         enic->vdev = vnic_dev_register(NULL, enic, pdev, enic->bar,
2412                 ARRAY_SIZE(enic->bar));
2413         if (!enic->vdev) {
2414                 dev_err(dev, "vNIC registration failed, aborting\n");
2415                 err = -ENODEV;
2416                 goto err_out_iounmap;
2417         }
2418
2419 #ifdef CONFIG_PCI_IOV
2420         /* Get number of subvnics */
2421         pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_SRIOV);
2422         if (pos) {
2423                 pci_read_config_word(pdev, pos + PCI_SRIOV_TOTAL_VF,
2424                         &enic->num_vfs);
2425                 if (enic->num_vfs) {
2426                         err = pci_enable_sriov(pdev, enic->num_vfs);
2427                         if (err) {
2428                                 dev_err(dev, "SRIOV enable failed, aborting."
2429                                         " pci_enable_sriov() returned %d\n",
2430                                         err);
2431                                 goto err_out_vnic_unregister;
2432                         }
2433                         enic->priv_flags |= ENIC_SRIOV_ENABLED;
2434                         num_pps = enic->num_vfs;
2435                 }
2436         }
2437 #endif
2438
2439         /* Allocate structure for port profiles */
2440         enic->pp = kcalloc(num_pps, sizeof(*enic->pp), GFP_KERNEL);
2441         if (!enic->pp) {
2442                 err = -ENOMEM;
2443                 goto err_out_disable_sriov_pp;
2444         }
2445
2446         /* Issue device open to get device in known state
2447          */
2448
2449         err = enic_dev_open(enic);
2450         if (err) {
2451                 dev_err(dev, "vNIC dev open failed, aborting\n");
2452                 goto err_out_disable_sriov;
2453         }
2454
2455         /* Setup devcmd lock
2456          */
2457
2458         spin_lock_init(&enic->devcmd_lock);
2459         spin_lock_init(&enic->enic_api_lock);
2460
2461         /*
2462          * Set ingress vlan rewrite mode before vnic initialization
2463          */
2464
2465         err = enic_dev_set_ig_vlan_rewrite_mode(enic);
2466         if (err) {
2467                 dev_err(dev,
2468                         "Failed to set ingress vlan rewrite mode, aborting.\n");
2469                 goto err_out_dev_close;
2470         }
2471
2472         /* Issue device init to initialize the vnic-to-switch link.
2473          * We'll start with carrier off and wait for link UP
2474          * notification later to turn on carrier.  We don't need
2475          * to wait here for the vnic-to-switch link initialization
2476          * to complete; link UP notification is the indication that
2477          * the process is complete.
2478          */
2479
2480         netif_carrier_off(netdev);
2481
2482         /* Do not call dev_init for a dynamic vnic.
2483          * For a dynamic vnic, init_prov_info will be
2484          * called later by an upper layer.
2485          */
2486
2487         if (!enic_is_dynamic(enic)) {
2488                 err = vnic_dev_init(enic->vdev, 0);
2489                 if (err) {
2490                         dev_err(dev, "vNIC dev init failed, aborting\n");
2491                         goto err_out_dev_close;
2492                 }
2493         }
2494
2495         err = enic_dev_init(enic);
2496         if (err) {
2497                 dev_err(dev, "Device initialization failed, aborting\n");
2498                 goto err_out_dev_close;
2499         }
2500
2501         netif_set_real_num_tx_queues(netdev, enic->wq_count);
2502         netif_set_real_num_rx_queues(netdev, enic->rq_count);
2503
2504         /* Setup notification timer, HW reset task, and wq locks
2505          */
2506
2507         init_timer(&enic->notify_timer);
2508         enic->notify_timer.function = enic_notify_timer;
2509         enic->notify_timer.data = (unsigned long)enic;
2510
2511         enic_set_rx_coal_setting(enic);
2512         INIT_WORK(&enic->reset, enic_reset);
2513         INIT_WORK(&enic->change_mtu_work, enic_change_mtu_work);
2514
2515         for (i = 0; i < enic->wq_count; i++)
2516                 spin_lock_init(&enic->wq_lock[i]);
2517
2518         /* Register net device
2519          */
2520
2521         enic->port_mtu = enic->config.mtu;
2522         (void)enic_change_mtu(netdev, enic->port_mtu);
2523
2524         err = enic_set_mac_addr(netdev, enic->mac_addr);
2525         if (err) {
2526                 dev_err(dev, "Invalid MAC address, aborting\n");
2527                 goto err_out_dev_deinit;
2528         }
2529
2530         enic->tx_coalesce_usecs = enic->config.intr_timer_usec;
2531         /* rx coalesce time already got initialized. This gets used
2532          * if adaptive coal is turned off
2533          */
2534         enic->rx_coalesce_usecs = enic->tx_coalesce_usecs;
2535
2536         if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic))
2537                 netdev->netdev_ops = &enic_netdev_dynamic_ops;
2538         else
2539                 netdev->netdev_ops = &enic_netdev_ops;
2540
2541         netdev->watchdog_timeo = 2 * HZ;
2542         enic_set_ethtool_ops(netdev);
2543
2544         netdev->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX;
2545         if (ENIC_SETTING(enic, LOOP)) {
2546                 netdev->features &= ~NETIF_F_HW_VLAN_CTAG_TX;
2547                 enic->loop_enable = 1;
2548                 enic->loop_tag = enic->config.loop_tag;
2549                 dev_info(dev, "loopback tag=0x%04x\n", enic->loop_tag);
2550         }
2551         if (ENIC_SETTING(enic, TXCSUM))
2552                 netdev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM;
2553         if (ENIC_SETTING(enic, TSO))
2554                 netdev->hw_features |= NETIF_F_TSO |
2555                         NETIF_F_TSO6 | NETIF_F_TSO_ECN;
2556         if (ENIC_SETTING(enic, RSS))
2557                 netdev->hw_features |= NETIF_F_RXHASH;
2558         if (ENIC_SETTING(enic, RXCSUM))
2559                 netdev->hw_features |= NETIF_F_RXCSUM;
2560
2561         netdev->features |= netdev->hw_features;
2562
2563 #ifdef CONFIG_RFS_ACCEL
2564         netdev->hw_features |= NETIF_F_NTUPLE;
2565 #endif
2566
2567         if (using_dac)
2568                 netdev->features |= NETIF_F_HIGHDMA;
2569
2570         netdev->priv_flags |= IFF_UNICAST_FLT;
2571
2572         err = register_netdev(netdev);
2573         if (err) {
2574                 dev_err(dev, "Cannot register net device, aborting\n");
2575                 goto err_out_dev_deinit;
2576         }
2577         enic->rx_copybreak = RX_COPYBREAK_DEFAULT;
2578
2579         return 0;
2580
2581 err_out_dev_deinit:
2582         enic_dev_deinit(enic);
2583 err_out_dev_close:
2584         vnic_dev_close(enic->vdev);
2585 err_out_disable_sriov:
2586         kfree(enic->pp);
2587 err_out_disable_sriov_pp:
2588 #ifdef CONFIG_PCI_IOV
2589         if (enic_sriov_enabled(enic)) {
2590                 pci_disable_sriov(pdev);
2591                 enic->priv_flags &= ~ENIC_SRIOV_ENABLED;
2592         }
2593 err_out_vnic_unregister:
2594 #endif
2595         vnic_dev_unregister(enic->vdev);
2596 err_out_iounmap:
2597         enic_iounmap(enic);
2598 err_out_release_regions:
2599         pci_release_regions(pdev);
2600 err_out_disable_device:
2601         pci_disable_device(pdev);
2602 err_out_free_netdev:
2603         free_netdev(netdev);
2604
2605         return err;
2606 }
2607
2608 static void enic_remove(struct pci_dev *pdev)
2609 {
2610         struct net_device *netdev = pci_get_drvdata(pdev);
2611
2612         if (netdev) {
2613                 struct enic *enic = netdev_priv(netdev);
2614
2615                 cancel_work_sync(&enic->reset);
2616                 cancel_work_sync(&enic->change_mtu_work);
2617                 unregister_netdev(netdev);
2618                 enic_dev_deinit(enic);
2619                 vnic_dev_close(enic->vdev);
2620 #ifdef CONFIG_PCI_IOV
2621                 if (enic_sriov_enabled(enic)) {
2622                         pci_disable_sriov(pdev);
2623                         enic->priv_flags &= ~ENIC_SRIOV_ENABLED;
2624                 }
2625 #endif
2626                 kfree(enic->pp);
2627                 vnic_dev_unregister(enic->vdev);
2628                 enic_iounmap(enic);
2629                 pci_release_regions(pdev);
2630                 pci_disable_device(pdev);
2631                 free_netdev(netdev);
2632         }
2633 }
2634
2635 static struct pci_driver enic_driver = {
2636         .name = DRV_NAME,
2637         .id_table = enic_id_table,
2638         .probe = enic_probe,
2639         .remove = enic_remove,
2640 };
2641
2642 static int __init enic_init_module(void)
2643 {
2644         pr_info("%s, ver %s\n", DRV_DESCRIPTION, DRV_VERSION);
2645
2646         return pci_register_driver(&enic_driver);
2647 }
2648
2649 static void __exit enic_cleanup_module(void)
2650 {
2651         pci_unregister_driver(&enic_driver);
2652 }
2653
2654 module_init(enic_init_module);
2655 module_exit(enic_cleanup_module);