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                 enic_queue_rq_desc(rq, buf->os_buf, os_buf_index, buf->dma_addr,
 944                                    buf->len);
 945
 946                 return 0;
 947         }
 948         skb = netdev_alloc_skb_ip_align(netdev, len);
 949         if (!skb)
 950                 return -ENOMEM;
 951
 952         dma_addr = pci_map_single(enic->pdev, skb->data,
 953                 len, PCI_DMA_FROMDEVICE);
 954
 955         enic_queue_rq_desc(rq, skb, os_buf_index,
 956                 dma_addr, len);
 957
 958         return 0;
 959 }
 960
 961 static void enic_intr_update_pkt_size(struct vnic_rx_bytes_counter *pkt_size,
 962                                       u32 pkt_len)
 963 {
 964         if (ENIC_LARGE_PKT_THRESHOLD <= pkt_len)
 965                 pkt_size->large_pkt_bytes_cnt += pkt_len;
 966         else
 967                 pkt_size->small_pkt_bytes_cnt += pkt_len;
 968 }
 969
 970 static bool enic_rxcopybreak(struct net_device *netdev, struct sk_buff **skb,
 971                              struct vnic_rq_buf *buf, u16 len)
 972 {
 973         struct enic *enic = netdev_priv(netdev);
 974         struct sk_buff *new_skb;
 975
 976         if (len > enic->rx_copybreak)
 977                 return false;
 978         new_skb = netdev_alloc_skb_ip_align(netdev, len);
 979         if (!new_skb)
 980                 return false;
 981         pci_dma_sync_single_for_cpu(enic->pdev, buf->dma_addr, len,
 982                                     DMA_FROM_DEVICE);
 983         memcpy(new_skb->data, (*skb)->data, len);
 984         *skb = new_skb;
 985
 986         return true;
 987 }
 988
 989 static void enic_rq_indicate_buf(struct vnic_rq *rq,
 990         struct cq_desc *cq_desc, struct vnic_rq_buf *buf,
 991         int skipped, void *opaque)
 992 {
 993         struct enic *enic = vnic_dev_priv(rq->vdev);
 994         struct net_device *netdev = enic->netdev;
 995         struct sk_buff *skb;
 996         struct vnic_cq *cq = &enic->cq[enic_cq_rq(enic, rq->index)];
 997
 998         u8 type, color, eop, sop, ingress_port, vlan_stripped;
 999         u8 fcoe, fcoe_sof, fcoe_fc_crc_ok, fcoe_enc_error, fcoe_eof;
1000         u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok;
1001         u8 ipv6, ipv4, ipv4_fragment, fcs_ok, rss_type, csum_not_calc;
1002         u8 packet_error;
1003         u16 q_number, completed_index, bytes_written, vlan_tci, checksum;
1004         u32 rss_hash;
1005
1006         if (skipped)
1007                 return;
1008
1009         skb = buf->os_buf;
1010
1011         cq_enet_rq_desc_dec((struct cq_enet_rq_desc *)cq_desc,
1012                 &type, &color, &q_number, &completed_index,
1013                 &ingress_port, &fcoe, &eop, &sop, &rss_type,
1014                 &csum_not_calc, &rss_hash, &bytes_written,
1015                 &packet_error, &vlan_stripped, &vlan_tci, &checksum,
1016                 &fcoe_sof, &fcoe_fc_crc_ok, &fcoe_enc_error,
1017                 &fcoe_eof, &tcp_udp_csum_ok, &udp, &tcp,
1018                 &ipv4_csum_ok, &ipv6, &ipv4, &ipv4_fragment,
1019                 &fcs_ok);
1020
1021         if (packet_error) {
1022
1023                 if (!fcs_ok) {
1024                         if (bytes_written > 0)
1025                                 enic->rq_bad_fcs++;
1026                         else if (bytes_written == 0)
1027                                 enic->rq_truncated_pkts++;
1028                 }
1029
1030                 pci_unmap_single(enic->pdev, buf->dma_addr, buf->len,
1031                                  PCI_DMA_FROMDEVICE);
1032                 dev_kfree_skb_any(skb);
1033                 buf->os_buf = NULL;
1034
1035                 return;
1036         }
1037
1038         if (eop && bytes_written > 0) {
1039
1040                 /* Good receive
1041                  */
1042
1043                 if (!enic_rxcopybreak(netdev, &skb, buf, bytes_written)) {
1044                         buf->os_buf = NULL;
1045                         pci_unmap_single(enic->pdev, buf->dma_addr, buf->len,
1046                                          PCI_DMA_FROMDEVICE);
1047                 }
1048                 prefetch(skb->data - NET_IP_ALIGN);
1049
1050                 skb_put(skb, bytes_written);
1051                 skb->protocol = eth_type_trans(skb, netdev);
1052                 skb_record_rx_queue(skb, q_number);
1053                 if (netdev->features & NETIF_F_RXHASH) {
1054                         skb_set_hash(skb, rss_hash,
1055                                      (rss_type &
1056                                       (NIC_CFG_RSS_HASH_TYPE_TCP_IPV6_EX |
1057                                        NIC_CFG_RSS_HASH_TYPE_TCP_IPV6 |
1058                                        NIC_CFG_RSS_HASH_TYPE_TCP_IPV4)) ?
1059                                      PKT_HASH_TYPE_L4 : PKT_HASH_TYPE_L3);
1060                 }
1061
1062                 if ((netdev->features & NETIF_F_RXCSUM) && !csum_not_calc) {
1063                         skb->csum = htons(checksum);
1064                         skb->ip_summed = CHECKSUM_COMPLETE;
1065                 }
1066
1067                 if (vlan_stripped)
1068                         __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan_tci);
1069
1070                 skb_mark_napi_id(skb, &enic->napi[rq->index]);
1071                 if (enic_poll_busy_polling(rq) ||
1072                     !(netdev->features & NETIF_F_GRO))
1073                         netif_receive_skb(skb);
1074                 else
1075                         napi_gro_receive(&enic->napi[q_number], skb);
1076                 if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce)
1077                         enic_intr_update_pkt_size(&cq->pkt_size_counter,
1078                                                   bytes_written);
1079         } else {
1080
1081                 /* Buffer overflow
1082                  */
1083
1084                 pci_unmap_single(enic->pdev, buf->dma_addr, buf->len,
1085                                  PCI_DMA_FROMDEVICE);
1086                 dev_kfree_skb_any(skb);
1087                 buf->os_buf = NULL;
1088         }
1089 }
1090
1091 static int enic_rq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc,
1092         u8 type, u16 q_number, u16 completed_index, void *opaque)
1093 {
1094         struct enic *enic = vnic_dev_priv(vdev);
1095
1096         vnic_rq_service(&enic->rq[q_number], cq_desc,
1097                 completed_index, VNIC_RQ_RETURN_DESC,
1098                 enic_rq_indicate_buf, opaque);
1099
1100         return 0;
1101 }
1102
1103 static int enic_poll(struct napi_struct *napi, int budget)
1104 {
1105         struct net_device *netdev = napi->dev;
1106         struct enic *enic = netdev_priv(netdev);
1107         unsigned int cq_rq = enic_cq_rq(enic, 0);
1108         unsigned int cq_wq = enic_cq_wq(enic, 0);
1109         unsigned int intr = enic_legacy_io_intr();
1110         unsigned int rq_work_to_do = budget;
1111         unsigned int wq_work_to_do = -1; /* no limit */
1112         unsigned int  work_done, rq_work_done = 0, wq_work_done;
1113         int err;
1114
1115         wq_work_done = vnic_cq_service(&enic->cq[cq_wq], wq_work_to_do,
1116                                        enic_wq_service, NULL);
1117
1118         if (!enic_poll_lock_napi(&enic->rq[cq_rq])) {
1119                 if (wq_work_done > 0)
1120                         vnic_intr_return_credits(&enic->intr[intr],
1121                                                  wq_work_done,
1122                                                  0 /* dont unmask intr */,
1123                                                  0 /* dont reset intr timer */);
1124                 return rq_work_done;
1125         }
1126
1127         if (budget > 0)
1128                 rq_work_done = vnic_cq_service(&enic->cq[cq_rq],
1129                         rq_work_to_do, enic_rq_service, NULL);
1130
1131         /* Accumulate intr event credits for this polling
1132          * cycle.  An intr event is the completion of a
1133          * a WQ or RQ packet.
1134          */
1135
1136         work_done = rq_work_done + wq_work_done;
1137
1138         if (work_done > 0)
1139                 vnic_intr_return_credits(&enic->intr[intr],
1140                         work_done,
1141                         0 /* don't unmask intr */,
1142                         0 /* don't reset intr timer */);
1143
1144         err = vnic_rq_fill(&enic->rq[0], enic_rq_alloc_buf);
1145
1146         /* Buffer allocation failed. Stay in polling
1147          * mode so we can try to fill the ring again.
1148          */
1149
1150         if (err)
1151                 rq_work_done = rq_work_to_do;
1152
1153         if (rq_work_done < rq_work_to_do) {
1154
1155                 /* Some work done, but not enough to stay in polling,
1156                  * exit polling
1157                  */
1158
1159                 napi_complete(napi);
1160                 vnic_intr_unmask(&enic->intr[intr]);
1161         }
1162         enic_poll_unlock_napi(&enic->rq[cq_rq]);
1163
1164         return rq_work_done;
1165 }
1166
1167 static void enic_set_int_moderation(struct enic *enic, struct vnic_rq *rq)
1168 {
1169         unsigned int intr = enic_msix_rq_intr(enic, rq->index);
1170         struct vnic_cq *cq = &enic->cq[enic_cq_rq(enic, rq->index)];
1171         u32 timer = cq->tobe_rx_coal_timeval;
1172
1173         if (cq->tobe_rx_coal_timeval != cq->cur_rx_coal_timeval) {
1174                 vnic_intr_coalescing_timer_set(&enic->intr[intr], timer);
1175                 cq->cur_rx_coal_timeval = cq->tobe_rx_coal_timeval;
1176         }
1177 }
1178
1179 static void enic_calc_int_moderation(struct enic *enic, struct vnic_rq *rq)
1180 {
1181         struct enic_rx_coal *rx_coal = &enic->rx_coalesce_setting;
1182         struct vnic_cq *cq = &enic->cq[enic_cq_rq(enic, rq->index)];
1183         struct vnic_rx_bytes_counter *pkt_size_counter = &cq->pkt_size_counter;
1184         int index;
1185         u32 timer;
1186         u32 range_start;
1187         u32 traffic;
1188         u64 delta;
1189         ktime_t now = ktime_get();
1190
1191         delta = ktime_us_delta(now, cq->prev_ts);
1192         if (delta < ENIC_AIC_TS_BREAK)
1193                 return;
1194         cq->prev_ts = now;
1195
1196         traffic = pkt_size_counter->large_pkt_bytes_cnt +
1197                   pkt_size_counter->small_pkt_bytes_cnt;
1198         /* The table takes Mbps
1199          * traffic *= 8    => bits
1200          * traffic *= (10^6 / delta)    => bps
1201          * traffic /= 10^6     => Mbps
1202          *
1203          * Combining, traffic *= (8 / delta)
1204          */
1205
1206         traffic <<= 3;
1207         traffic = delta > UINT_MAX ? 0 : traffic / (u32)delta;
1208
1209         for (index = 0; index < ENIC_MAX_COALESCE_TIMERS; index++)
1210                 if (traffic < mod_table[index].rx_rate)
1211                         break;
1212         range_start = (pkt_size_counter->small_pkt_bytes_cnt >
1213                        pkt_size_counter->large_pkt_bytes_cnt << 1) ?
1214                       rx_coal->small_pkt_range_start :
1215                       rx_coal->large_pkt_range_start;
1216         timer = range_start + ((rx_coal->range_end - range_start) *
1217                                mod_table[index].range_percent / 100);
1218         /* Damping */
1219         cq->tobe_rx_coal_timeval = (timer + cq->tobe_rx_coal_timeval) >> 1;
1220
1221         pkt_size_counter->large_pkt_bytes_cnt = 0;
1222         pkt_size_counter->small_pkt_bytes_cnt = 0;
1223 }
1224
1225 #ifdef CONFIG_RFS_ACCEL
1226 static void enic_free_rx_cpu_rmap(struct enic *enic)
1227 {
1228         free_irq_cpu_rmap(enic->netdev->rx_cpu_rmap);
1229         enic->netdev->rx_cpu_rmap = NULL;
1230 }
1231
1232 static void enic_set_rx_cpu_rmap(struct enic *enic)
1233 {
1234         int i, res;
1235
1236         if (vnic_dev_get_intr_mode(enic->vdev) == VNIC_DEV_INTR_MODE_MSIX) {
1237                 enic->netdev->rx_cpu_rmap = alloc_irq_cpu_rmap(enic->rq_count);
1238                 if (unlikely(!enic->netdev->rx_cpu_rmap))
1239                         return;
1240                 for (i = 0; i < enic->rq_count; i++) {
1241                         res = irq_cpu_rmap_add(enic->netdev->rx_cpu_rmap,
1242                                                enic->msix_entry[i].vector);
1243                         if (unlikely(res)) {
1244                                 enic_free_rx_cpu_rmap(enic);
1245                                 return;
1246                         }
1247                 }
1248         }
1249 }
1250
1251 #else
1252
1253 static void enic_free_rx_cpu_rmap(struct enic *enic)
1254 {
1255 }
1256
1257 static void enic_set_rx_cpu_rmap(struct enic *enic)
1258 {
1259 }
1260
1261 #endif /* CONFIG_RFS_ACCEL */
1262
1263 #ifdef CONFIG_NET_RX_BUSY_POLL
1264 int enic_busy_poll(struct napi_struct *napi)
1265 {
1266         struct net_device *netdev = napi->dev;
1267         struct enic *enic = netdev_priv(netdev);
1268         unsigned int rq = (napi - &enic->napi[0]);
1269         unsigned int cq = enic_cq_rq(enic, rq);
1270         unsigned int intr = enic_msix_rq_intr(enic, rq);
1271         unsigned int work_to_do = -1; /* clean all pkts possible */
1272         unsigned int work_done;
1273
1274         if (!enic_poll_lock_poll(&enic->rq[rq]))
1275                 return LL_FLUSH_BUSY;
1276         work_done = vnic_cq_service(&enic->cq[cq], work_to_do,
1277                                     enic_rq_service, NULL);
1278
1279         if (work_done > 0)
1280                 vnic_intr_return_credits(&enic->intr[intr],
1281                                          work_done, 0, 0);
1282         vnic_rq_fill(&enic->rq[rq], enic_rq_alloc_buf);
1283         if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce)
1284                 enic_calc_int_moderation(enic, &enic->rq[rq]);
1285         enic_poll_unlock_poll(&enic->rq[rq]);
1286
1287         return work_done;
1288 }
1289 #endif /* CONFIG_NET_RX_BUSY_POLL */
1290
1291 static int enic_poll_msix_wq(struct napi_struct *napi, int budget)
1292 {
1293         struct net_device *netdev = napi->dev;
1294         struct enic *enic = netdev_priv(netdev);
1295         unsigned int wq_index = (napi - &enic->napi[0]) - enic->rq_count;
1296         struct vnic_wq *wq = &enic->wq[wq_index];
1297         unsigned int cq;
1298         unsigned int intr;
1299         unsigned int wq_work_to_do = -1; /* clean all desc possible */
1300         unsigned int wq_work_done;
1301         unsigned int wq_irq;
1302
1303         wq_irq = wq->index;
1304         cq = enic_cq_wq(enic, wq_irq);
1305         intr = enic_msix_wq_intr(enic, wq_irq);
1306         wq_work_done = vnic_cq_service(&enic->cq[cq], wq_work_to_do,
1307                                        enic_wq_service, NULL);
1308
1309         vnic_intr_return_credits(&enic->intr[intr], wq_work_done,
1310                                  0 /* don't unmask intr */,
1311                                  1 /* reset intr timer */);
1312         if (!wq_work_done) {
1313                 napi_complete(napi);
1314                 vnic_intr_unmask(&enic->intr[intr]);
1315                 return 0;
1316         }
1317
1318         return budget;
1319 }
1320
1321 static int enic_poll_msix_rq(struct napi_struct *napi, int budget)
1322 {
1323         struct net_device *netdev = napi->dev;
1324         struct enic *enic = netdev_priv(netdev);
1325         unsigned int rq = (napi - &enic->napi[0]);
1326         unsigned int cq = enic_cq_rq(enic, rq);
1327         unsigned int intr = enic_msix_rq_intr(enic, rq);
1328         unsigned int work_to_do = budget;
1329         unsigned int work_done = 0;
1330         int err;
1331
1332         if (!enic_poll_lock_napi(&enic->rq[rq]))
1333                 return work_done;
1334         /* Service RQ
1335          */
1336
1337         if (budget > 0)
1338                 work_done = vnic_cq_service(&enic->cq[cq],
1339                         work_to_do, enic_rq_service, NULL);
1340
1341         /* Return intr event credits for this polling
1342          * cycle.  An intr event is the completion of a
1343          * RQ packet.
1344          */
1345
1346         if (work_done > 0)
1347                 vnic_intr_return_credits(&enic->intr[intr],
1348                         work_done,
1349                         0 /* don't unmask intr */,
1350                         0 /* don't reset intr timer */);
1351
1352         err = vnic_rq_fill(&enic->rq[rq], enic_rq_alloc_buf);
1353
1354         /* Buffer allocation failed. Stay in polling mode
1355          * so we can try to fill the ring again.
1356          */
1357
1358         if (err)
1359                 work_done = work_to_do;
1360         if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce)
1361                 /* Call the function which refreshes
1362                  * the intr coalescing timer value based on
1363                  * the traffic.  This is supported only in
1364                  * the case of MSI-x mode
1365                  */
1366                 enic_calc_int_moderation(enic, &enic->rq[rq]);
1367
1368         if (work_done < work_to_do) {
1369
1370                 /* Some work done, but not enough to stay in polling,
1371                  * exit polling
1372                  */
1373
1374                 napi_complete(napi);
1375                 if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce)
1376                         enic_set_int_moderation(enic, &enic->rq[rq]);
1377                 vnic_intr_unmask(&enic->intr[intr]);
1378         }
1379         enic_poll_unlock_napi(&enic->rq[rq]);
1380
1381         return work_done;
1382 }
1383
1384 static void enic_notify_timer(unsigned long data)
1385 {
1386         struct enic *enic = (struct enic *)data;
1387
1388         enic_notify_check(enic);
1389
1390         mod_timer(&enic->notify_timer,
1391                 round_jiffies(jiffies + ENIC_NOTIFY_TIMER_PERIOD));
1392 }
1393
1394 static void enic_free_intr(struct enic *enic)
1395 {
1396         struct net_device *netdev = enic->netdev;
1397         unsigned int i;
1398
1399         enic_free_rx_cpu_rmap(enic);
1400         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1401         case VNIC_DEV_INTR_MODE_INTX:
1402                 free_irq(enic->pdev->irq, netdev);
1403                 break;
1404         case VNIC_DEV_INTR_MODE_MSI:
1405                 free_irq(enic->pdev->irq, enic);
1406                 break;
1407         case VNIC_DEV_INTR_MODE_MSIX:
1408                 for (i = 0; i < ARRAY_SIZE(enic->msix); i++)
1409                         if (enic->msix[i].requested)
1410                                 free_irq(enic->msix_entry[i].vector,
1411                                         enic->msix[i].devid);
1412                 break;
1413         default:
1414                 break;
1415         }
1416 }
1417
1418 static int enic_request_intr(struct enic *enic)
1419 {
1420         struct net_device *netdev = enic->netdev;
1421         unsigned int i, intr;
1422         int err = 0;
1423
1424         enic_set_rx_cpu_rmap(enic);
1425         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1426
1427         case VNIC_DEV_INTR_MODE_INTX:
1428
1429                 err = request_irq(enic->pdev->irq, enic_isr_legacy,
1430                         IRQF_SHARED, netdev->name, netdev);
1431                 break;
1432
1433         case VNIC_DEV_INTR_MODE_MSI:
1434
1435                 err = request_irq(enic->pdev->irq, enic_isr_msi,
1436                         0, netdev->name, enic);
1437                 break;
1438
1439         case VNIC_DEV_INTR_MODE_MSIX:
1440
1441                 for (i = 0; i < enic->rq_count; i++) {
1442                         intr = enic_msix_rq_intr(enic, i);
1443                         snprintf(enic->msix[intr].devname,
1444                                 sizeof(enic->msix[intr].devname),
1445                                 "%.11s-rx-%d", netdev->name, i);
1446                         enic->msix[intr].isr = enic_isr_msix;
1447                         enic->msix[intr].devid = &enic->napi[i];
1448                 }
1449
1450                 for (i = 0; i < enic->wq_count; i++) {
1451                         int wq = enic_cq_wq(enic, i);
1452
1453                         intr = enic_msix_wq_intr(enic, i);
1454                         snprintf(enic->msix[intr].devname,
1455                                 sizeof(enic->msix[intr].devname),
1456                                 "%.11s-tx-%d", netdev->name, i);
1457                         enic->msix[intr].isr = enic_isr_msix;
1458                         enic->msix[intr].devid = &enic->napi[wq];
1459                 }
1460
1461                 intr = enic_msix_err_intr(enic);
1462                 snprintf(enic->msix[intr].devname,
1463                         sizeof(enic->msix[intr].devname),
1464                         "%.11s-err", netdev->name);
1465                 enic->msix[intr].isr = enic_isr_msix_err;
1466                 enic->msix[intr].devid = enic;
1467
1468                 intr = enic_msix_notify_intr(enic);
1469                 snprintf(enic->msix[intr].devname,
1470                         sizeof(enic->msix[intr].devname),
1471                         "%.11s-notify", netdev->name);
1472                 enic->msix[intr].isr = enic_isr_msix_notify;
1473                 enic->msix[intr].devid = enic;
1474
1475                 for (i = 0; i < ARRAY_SIZE(enic->msix); i++)
1476                         enic->msix[i].requested = 0;
1477
1478                 for (i = 0; i < enic->intr_count; i++) {
1479                         err = request_irq(enic->msix_entry[i].vector,
1480                                 enic->msix[i].isr, 0,
1481                                 enic->msix[i].devname,
1482                                 enic->msix[i].devid);
1483                         if (err) {
1484                                 enic_free_intr(enic);
1485                                 break;
1486                         }
1487                         enic->msix[i].requested = 1;
1488                 }
1489
1490                 break;
1491
1492         default:
1493                 break;
1494         }
1495
1496         return err;
1497 }
1498
1499 static void enic_synchronize_irqs(struct enic *enic)
1500 {
1501         unsigned int i;
1502
1503         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1504         case VNIC_DEV_INTR_MODE_INTX:
1505         case VNIC_DEV_INTR_MODE_MSI:
1506                 synchronize_irq(enic->pdev->irq);
1507                 break;
1508         case VNIC_DEV_INTR_MODE_MSIX:
1509                 for (i = 0; i < enic->intr_count; i++)
1510                         synchronize_irq(enic->msix_entry[i].vector);
1511                 break;
1512         default:
1513                 break;
1514         }
1515 }
1516
1517 static void enic_set_rx_coal_setting(struct enic *enic)
1518 {
1519         unsigned int speed;
1520         int index = -1;
1521         struct enic_rx_coal *rx_coal = &enic->rx_coalesce_setting;
1522
1523         /* If intr mode is not MSIX, do not do adaptive coalescing */
1524         if (VNIC_DEV_INTR_MODE_MSIX != vnic_dev_get_intr_mode(enic->vdev)) {
1525                 netdev_info(enic->netdev, "INTR mode is not MSIX, Not initializing adaptive coalescing");
1526                 return;
1527         }
1528
1529         /* 1. Read the link speed from fw
1530          * 2. Pick the default range for the speed
1531          * 3. Update it in enic->rx_coalesce_setting
1532          */
1533         speed = vnic_dev_port_speed(enic->vdev);
1534         if (ENIC_LINK_SPEED_10G < speed)
1535                 index = ENIC_LINK_40G_INDEX;
1536         else if (ENIC_LINK_SPEED_4G < speed)
1537                 index = ENIC_LINK_10G_INDEX;
1538         else
1539                 index = ENIC_LINK_4G_INDEX;
1540
1541         rx_coal->small_pkt_range_start = mod_range[index].small_pkt_range_start;
1542         rx_coal->large_pkt_range_start = mod_range[index].large_pkt_range_start;
1543         rx_coal->range_end = ENIC_RX_COALESCE_RANGE_END;
1544
1545         /* Start with the value provided by UCSM */
1546         for (index = 0; index < enic->rq_count; index++)
1547                 enic->cq[index].cur_rx_coal_timeval =
1548                                 enic->config.intr_timer_usec;
1549
1550         rx_coal->use_adaptive_rx_coalesce = 1;
1551 }
1552
1553 static int enic_dev_notify_set(struct enic *enic)
1554 {
1555         int err;
1556
1557         spin_lock_bh(&enic->devcmd_lock);
1558         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1559         case VNIC_DEV_INTR_MODE_INTX:
1560                 err = vnic_dev_notify_set(enic->vdev,
1561                         enic_legacy_notify_intr());
1562                 break;
1563         case VNIC_DEV_INTR_MODE_MSIX:
1564                 err = vnic_dev_notify_set(enic->vdev,
1565                         enic_msix_notify_intr(enic));
1566                 break;
1567         default:
1568                 err = vnic_dev_notify_set(enic->vdev, -1 /* no intr */);
1569                 break;
1570         }
1571         spin_unlock_bh(&enic->devcmd_lock);
1572
1573         return err;
1574 }
1575
1576 static void enic_notify_timer_start(struct enic *enic)
1577 {
1578         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1579         case VNIC_DEV_INTR_MODE_MSI:
1580                 mod_timer(&enic->notify_timer, jiffies);
1581                 break;
1582         default:
1583                 /* Using intr for notification for INTx/MSI-X */
1584                 break;
1585         }
1586 }
1587
1588 /* rtnl lock is held, process context */
1589 static int enic_open(struct net_device *netdev)
1590 {
1591         struct enic *enic = netdev_priv(netdev);
1592         unsigned int i;
1593         int err;
1594
1595         err = enic_request_intr(enic);
1596         if (err) {
1597                 netdev_err(netdev, "Unable to request irq.\n");
1598                 return err;
1599         }
1600
1601         err = enic_dev_notify_set(enic);
1602         if (err) {
1603                 netdev_err(netdev,
1604                         "Failed to alloc notify buffer, aborting.\n");
1605                 goto err_out_free_intr;
1606         }
1607
1608         for (i = 0; i < enic->rq_count; i++) {
1609                 vnic_rq_fill(&enic->rq[i], enic_rq_alloc_buf);
1610                 /* Need at least one buffer on ring to get going */
1611                 if (vnic_rq_desc_used(&enic->rq[i]) == 0) {
1612                         netdev_err(netdev, "Unable to alloc receive buffers\n");
1613                         err = -ENOMEM;
1614                         goto err_out_notify_unset;
1615                 }
1616         }
1617
1618         for (i = 0; i < enic->wq_count; i++)
1619                 vnic_wq_enable(&enic->wq[i]);
1620         for (i = 0; i < enic->rq_count; i++)
1621                 vnic_rq_enable(&enic->rq[i]);
1622
1623         if (!enic_is_dynamic(enic) && !enic_is_sriov_vf(enic))
1624                 enic_dev_add_station_addr(enic);
1625
1626         enic_set_rx_mode(netdev);
1627
1628         netif_tx_wake_all_queues(netdev);
1629
1630         for (i = 0; i < enic->rq_count; i++) {
1631                 enic_busy_poll_init_lock(&enic->rq[i]);
1632                 napi_enable(&enic->napi[i]);
1633         }
1634         if (vnic_dev_get_intr_mode(enic->vdev) == VNIC_DEV_INTR_MODE_MSIX)
1635                 for (i = 0; i < enic->wq_count; i++)
1636                         napi_enable(&enic->napi[enic_cq_wq(enic, i)]);
1637         enic_dev_enable(enic);
1638
1639         for (i = 0; i < enic->intr_count; i++)
1640                 vnic_intr_unmask(&enic->intr[i]);
1641
1642         enic_notify_timer_start(enic);
1643         enic_rfs_flw_tbl_init(enic);
1644
1645         return 0;
1646
1647 err_out_notify_unset:
1648         enic_dev_notify_unset(enic);
1649 err_out_free_intr:
1650         enic_free_intr(enic);
1651
1652         return err;
1653 }
1654
1655 /* rtnl lock is held, process context */
1656 static int enic_stop(struct net_device *netdev)
1657 {
1658         struct enic *enic = netdev_priv(netdev);
1659         unsigned int i;
1660         int err;
1661
1662         for (i = 0; i < enic->intr_count; i++) {
1663                 vnic_intr_mask(&enic->intr[i]);
1664                 (void)vnic_intr_masked(&enic->intr[i]); /* flush write */
1665         }
1666
1667         enic_synchronize_irqs(enic);
1668
1669         del_timer_sync(&enic->notify_timer);
1670         enic_rfs_flw_tbl_free(enic);
1671
1672         enic_dev_disable(enic);
1673
1674         for (i = 0; i < enic->rq_count; i++) {
1675                 napi_disable(&enic->napi[i]);
1676                 local_bh_disable();
1677                 while (!enic_poll_lock_napi(&enic->rq[i]))
1678                         mdelay(1);
1679                 local_bh_enable();
1680         }
1681
1682         netif_carrier_off(netdev);
1683         netif_tx_disable(netdev);
1684         if (vnic_dev_get_intr_mode(enic->vdev) == VNIC_DEV_INTR_MODE_MSIX)
1685                 for (i = 0; i < enic->wq_count; i++)
1686                         napi_disable(&enic->napi[enic_cq_wq(enic, i)]);
1687
1688         if (!enic_is_dynamic(enic) && !enic_is_sriov_vf(enic))
1689                 enic_dev_del_station_addr(enic);
1690
1691         for (i = 0; i < enic->wq_count; i++) {
1692                 err = vnic_wq_disable(&enic->wq[i]);
1693                 if (err)
1694                         return err;
1695         }
1696         for (i = 0; i < enic->rq_count; i++) {
1697                 err = vnic_rq_disable(&enic->rq[i]);
1698                 if (err)
1699                         return err;
1700         }
1701
1702         enic_dev_notify_unset(enic);
1703         enic_free_intr(enic);
1704
1705         for (i = 0; i < enic->wq_count; i++)
1706                 vnic_wq_clean(&enic->wq[i], enic_free_wq_buf);
1707         for (i = 0; i < enic->rq_count; i++)
1708                 vnic_rq_clean(&enic->rq[i], enic_free_rq_buf);
1709         for (i = 0; i < enic->cq_count; i++)
1710                 vnic_cq_clean(&enic->cq[i]);
1711         for (i = 0; i < enic->intr_count; i++)
1712                 vnic_intr_clean(&enic->intr[i]);
1713
1714         return 0;
1715 }
1716
1717 static int enic_change_mtu(struct net_device *netdev, int new_mtu)
1718 {
1719         struct enic *enic = netdev_priv(netdev);
1720         int running = netif_running(netdev);
1721
1722         if (new_mtu < ENIC_MIN_MTU || new_mtu > ENIC_MAX_MTU)
1723                 return -EINVAL;
1724
1725         if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic))
1726                 return -EOPNOTSUPP;
1727
1728         if (running)
1729                 enic_stop(netdev);
1730
1731         netdev->mtu = new_mtu;
1732
1733         if (netdev->mtu > enic->port_mtu)
1734                 netdev_warn(netdev,
1735                         "interface MTU (%d) set higher than port MTU (%d)\n",
1736                         netdev->mtu, enic->port_mtu);
1737
1738         if (running)
1739                 enic_open(netdev);
1740
1741         return 0;
1742 }
1743
1744 static void enic_change_mtu_work(struct work_struct *work)
1745 {
1746         struct enic *enic = container_of(work, struct enic, change_mtu_work);
1747         struct net_device *netdev = enic->netdev;
1748         int new_mtu = vnic_dev_mtu(enic->vdev);
1749         int err;
1750         unsigned int i;
1751
1752         new_mtu = max_t(int, ENIC_MIN_MTU, min_t(int, ENIC_MAX_MTU, new_mtu));
1753
1754         rtnl_lock();
1755
1756         /* Stop RQ */
1757         del_timer_sync(&enic->notify_timer);
1758
1759         for (i = 0; i < enic->rq_count; i++)
1760                 napi_disable(&enic->napi[i]);
1761
1762         vnic_intr_mask(&enic->intr[0]);
1763         enic_synchronize_irqs(enic);
1764         err = vnic_rq_disable(&enic->rq[0]);
1765         if (err) {
1766                 rtnl_unlock();
1767                 netdev_err(netdev, "Unable to disable RQ.\n");
1768                 return;
1769         }
1770         vnic_rq_clean(&enic->rq[0], enic_free_rq_buf);
1771         vnic_cq_clean(&enic->cq[0]);
1772         vnic_intr_clean(&enic->intr[0]);
1773
1774         /* Fill RQ with new_mtu-sized buffers */
1775         netdev->mtu = new_mtu;
1776         vnic_rq_fill(&enic->rq[0], enic_rq_alloc_buf);
1777         /* Need at least one buffer on ring to get going */
1778         if (vnic_rq_desc_used(&enic->rq[0]) == 0) {
1779                 rtnl_unlock();
1780                 netdev_err(netdev, "Unable to alloc receive buffers.\n");
1781                 return;
1782         }
1783
1784         /* Start RQ */
1785         vnic_rq_enable(&enic->rq[0]);
1786         napi_enable(&enic->napi[0]);
1787         vnic_intr_unmask(&enic->intr[0]);
1788         enic_notify_timer_start(enic);
1789
1790         rtnl_unlock();
1791
1792         netdev_info(netdev, "interface MTU set as %d\n", netdev->mtu);
1793 }
1794
1795 #ifdef CONFIG_NET_POLL_CONTROLLER
1796 static void enic_poll_controller(struct net_device *netdev)
1797 {
1798         struct enic *enic = netdev_priv(netdev);
1799         struct vnic_dev *vdev = enic->vdev;
1800         unsigned int i, intr;
1801
1802         switch (vnic_dev_get_intr_mode(vdev)) {
1803         case VNIC_DEV_INTR_MODE_MSIX:
1804                 for (i = 0; i < enic->rq_count; i++) {
1805                         intr = enic_msix_rq_intr(enic, i);
1806                         enic_isr_msix(enic->msix_entry[intr].vector,
1807                                       &enic->napi[i]);
1808                 }
1809
1810                 for (i = 0; i < enic->wq_count; i++) {
1811                         intr = enic_msix_wq_intr(enic, i);
1812                         enic_isr_msix(enic->msix_entry[intr].vector,
1813                                       &enic->napi[enic_cq_wq(enic, i)]);
1814                 }
1815
1816                 break;
1817         case VNIC_DEV_INTR_MODE_MSI:
1818                 enic_isr_msi(enic->pdev->irq, enic);
1819                 break;
1820         case VNIC_DEV_INTR_MODE_INTX:
1821                 enic_isr_legacy(enic->pdev->irq, netdev);
1822                 break;
1823         default:
1824                 break;
1825         }
1826 }
1827 #endif
1828
1829 static int enic_dev_wait(struct vnic_dev *vdev,
1830         int (*start)(struct vnic_dev *, int),
1831         int (*finished)(struct vnic_dev *, int *),
1832         int arg)
1833 {
1834         unsigned long time;
1835         int done;
1836         int err;
1837
1838         BUG_ON(in_interrupt());
1839
1840         err = start(vdev, arg);
1841         if (err)
1842                 return err;
1843
1844         /* Wait for func to complete...2 seconds max
1845          */
1846
1847         time = jiffies + (HZ * 2);
1848         do {
1849
1850                 err = finished(vdev, &done);
1851                 if (err)
1852                         return err;
1853
1854                 if (done)
1855                         return 0;
1856
1857                 schedule_timeout_uninterruptible(HZ / 10);
1858
1859         } while (time_after(time, jiffies));
1860
1861         return -ETIMEDOUT;
1862 }
1863
1864 static int enic_dev_open(struct enic *enic)
1865 {
1866         int err;
1867
1868         err = enic_dev_wait(enic->vdev, vnic_dev_open,
1869                 vnic_dev_open_done, 0);
1870         if (err)
1871                 dev_err(enic_get_dev(enic), "vNIC device open failed, err %d\n",
1872                         err);
1873
1874         return err;
1875 }
1876
1877 static int enic_dev_hang_reset(struct enic *enic)
1878 {
1879         int err;
1880
1881         err = enic_dev_wait(enic->vdev, vnic_dev_hang_reset,
1882                 vnic_dev_hang_reset_done, 0);
1883         if (err)
1884                 netdev_err(enic->netdev, "vNIC hang reset failed, err %d\n",
1885                         err);
1886
1887         return err;
1888 }
1889
1890 static int enic_set_rsskey(struct enic *enic)
1891 {
1892         dma_addr_t rss_key_buf_pa;
1893         union vnic_rss_key *rss_key_buf_va = NULL;
1894         union vnic_rss_key rss_key = {
1895                 .key[0].b = {85, 67, 83, 97, 119, 101, 115, 111, 109, 101},
1896                 .key[1].b = {80, 65, 76, 79, 117, 110, 105, 113, 117, 101},
1897                 .key[2].b = {76, 73, 78, 85, 88, 114, 111, 99, 107, 115},
1898                 .key[3].b = {69, 78, 73, 67, 105, 115, 99, 111, 111, 108},
1899         };
1900         int err;
1901
1902         rss_key_buf_va = pci_alloc_consistent(enic->pdev,
1903                 sizeof(union vnic_rss_key), &rss_key_buf_pa);
1904         if (!rss_key_buf_va)
1905                 return -ENOMEM;
1906
1907         memcpy(rss_key_buf_va, &rss_key, sizeof(union vnic_rss_key));
1908
1909         spin_lock_bh(&enic->devcmd_lock);
1910         err = enic_set_rss_key(enic,
1911                 rss_key_buf_pa,
1912                 sizeof(union vnic_rss_key));
1913         spin_unlock_bh(&enic->devcmd_lock);
1914
1915         pci_free_consistent(enic->pdev, sizeof(union vnic_rss_key),
1916                 rss_key_buf_va, rss_key_buf_pa);
1917
1918         return err;
1919 }
1920
1921 static int enic_set_rsscpu(struct enic *enic, u8 rss_hash_bits)
1922 {
1923         dma_addr_t rss_cpu_buf_pa;
1924         union vnic_rss_cpu *rss_cpu_buf_va = NULL;
1925         unsigned int i;
1926         int err;
1927
1928         rss_cpu_buf_va = pci_alloc_consistent(enic->pdev,
1929                 sizeof(union vnic_rss_cpu), &rss_cpu_buf_pa);
1930         if (!rss_cpu_buf_va)
1931                 return -ENOMEM;
1932
1933         for (i = 0; i < (1 << rss_hash_bits); i++)
1934                 (*rss_cpu_buf_va).cpu[i/4].b[i%4] = i % enic->rq_count;
1935
1936         spin_lock_bh(&enic->devcmd_lock);
1937         err = enic_set_rss_cpu(enic,
1938                 rss_cpu_buf_pa,
1939                 sizeof(union vnic_rss_cpu));
1940         spin_unlock_bh(&enic->devcmd_lock);
1941
1942         pci_free_consistent(enic->pdev, sizeof(union vnic_rss_cpu),
1943                 rss_cpu_buf_va, rss_cpu_buf_pa);
1944
1945         return err;
1946 }
1947
1948 static int enic_set_niccfg(struct enic *enic, u8 rss_default_cpu,
1949         u8 rss_hash_type, u8 rss_hash_bits, u8 rss_base_cpu, u8 rss_enable)
1950 {
1951         const u8 tso_ipid_split_en = 0;
1952         const u8 ig_vlan_strip_en = 1;
1953         int err;
1954
1955         /* Enable VLAN tag stripping.
1956         */
1957
1958         spin_lock_bh(&enic->devcmd_lock);
1959         err = enic_set_nic_cfg(enic,
1960                 rss_default_cpu, rss_hash_type,
1961                 rss_hash_bits, rss_base_cpu,
1962                 rss_enable, tso_ipid_split_en,
1963                 ig_vlan_strip_en);
1964         spin_unlock_bh(&enic->devcmd_lock);
1965
1966         return err;
1967 }
1968
1969 static int enic_set_rss_nic_cfg(struct enic *enic)
1970 {
1971         struct device *dev = enic_get_dev(enic);
1972         const u8 rss_default_cpu = 0;
1973         const u8 rss_hash_type = NIC_CFG_RSS_HASH_TYPE_IPV4 |
1974                 NIC_CFG_RSS_HASH_TYPE_TCP_IPV4 |
1975                 NIC_CFG_RSS_HASH_TYPE_IPV6 |
1976                 NIC_CFG_RSS_HASH_TYPE_TCP_IPV6;
1977         const u8 rss_hash_bits = 7;
1978         const u8 rss_base_cpu = 0;
1979         u8 rss_enable = ENIC_SETTING(enic, RSS) && (enic->rq_count > 1);
1980
1981         if (rss_enable) {
1982                 if (!enic_set_rsskey(enic)) {
1983                         if (enic_set_rsscpu(enic, rss_hash_bits)) {
1984                                 rss_enable = 0;
1985                                 dev_warn(dev, "RSS disabled, "
1986                                         "Failed to set RSS cpu indirection table.");
1987                         }
1988                 } else {
1989                         rss_enable = 0;
1990                         dev_warn(dev, "RSS disabled, Failed to set RSS key.\n");
1991                 }
1992         }
1993
1994         return enic_set_niccfg(enic, rss_default_cpu, rss_hash_type,
1995                 rss_hash_bits, rss_base_cpu, rss_enable);
1996 }
1997
1998 static void enic_reset(struct work_struct *work)
1999 {
2000         struct enic *enic = container_of(work, struct enic, reset);
2001
2002         if (!netif_running(enic->netdev))
2003                 return;
2004
2005         rtnl_lock();
2006
2007         spin_lock(&enic->enic_api_lock);
2008         enic_dev_hang_notify(enic);
2009         enic_stop(enic->netdev);
2010         enic_dev_hang_reset(enic);
2011         enic_reset_addr_lists(enic);
2012         enic_init_vnic_resources(enic);
2013         enic_set_rss_nic_cfg(enic);
2014         enic_dev_set_ig_vlan_rewrite_mode(enic);
2015         enic_open(enic->netdev);
2016         spin_unlock(&enic->enic_api_lock);
2017         call_netdevice_notifiers(NETDEV_REBOOT, enic->netdev);
2018
2019         rtnl_unlock();
2020 }
2021
2022 static int enic_set_intr_mode(struct enic *enic)
2023 {
2024         unsigned int n = min_t(unsigned int, enic->rq_count, ENIC_RQ_MAX);
2025         unsigned int m = min_t(unsigned int, enic->wq_count, ENIC_WQ_MAX);
2026         unsigned int i;
2027
2028         /* Set interrupt mode (INTx, MSI, MSI-X) depending
2029          * on system capabilities.
2030          *
2031          * Try MSI-X first
2032          *
2033          * We need n RQs, m WQs, n+m CQs, and n+m+2 INTRs
2034          * (the second to last INTR is used for WQ/RQ errors)
2035          * (the last INTR is used for notifications)
2036          */
2037
2038         BUG_ON(ARRAY_SIZE(enic->msix_entry) < n + m + 2);
2039         for (i = 0; i < n + m + 2; i++)
2040                 enic->msix_entry[i].entry = i;
2041
2042         /* Use multiple RQs if RSS is enabled
2043          */
2044
2045         if (ENIC_SETTING(enic, RSS) &&
2046             enic->config.intr_mode < 1 &&
2047             enic->rq_count >= n &&
2048             enic->wq_count >= m &&
2049             enic->cq_count >= n + m &&
2050             enic->intr_count >= n + m + 2) {
2051
2052                 if (pci_enable_msix_range(enic->pdev, enic->msix_entry,
2053                                           n + m + 2, n + m + 2) > 0) {
2054
2055                         enic->rq_count = n;
2056                         enic->wq_count = m;
2057                         enic->cq_count = n + m;
2058                         enic->intr_count = n + m + 2;
2059
2060                         vnic_dev_set_intr_mode(enic->vdev,
2061                                 VNIC_DEV_INTR_MODE_MSIX);
2062
2063                         return 0;
2064                 }
2065         }
2066
2067         if (enic->config.intr_mode < 1 &&
2068             enic->rq_count >= 1 &&
2069             enic->wq_count >= m &&
2070             enic->cq_count >= 1 + m &&
2071             enic->intr_count >= 1 + m + 2) {
2072                 if (pci_enable_msix_range(enic->pdev, enic->msix_entry,
2073                                           1 + m + 2, 1 + m + 2) > 0) {
2074
2075                         enic->rq_count = 1;
2076                         enic->wq_count = m;
2077                         enic->cq_count = 1 + m;
2078                         enic->intr_count = 1 + m + 2;
2079
2080                         vnic_dev_set_intr_mode(enic->vdev,
2081                                 VNIC_DEV_INTR_MODE_MSIX);
2082
2083                         return 0;
2084                 }
2085         }
2086
2087         /* Next try MSI
2088          *
2089          * We need 1 RQ, 1 WQ, 2 CQs, and 1 INTR
2090          */
2091
2092         if (enic->config.intr_mode < 2 &&
2093             enic->rq_count >= 1 &&
2094             enic->wq_count >= 1 &&
2095             enic->cq_count >= 2 &&
2096             enic->intr_count >= 1 &&
2097             !pci_enable_msi(enic->pdev)) {
2098
2099                 enic->rq_count = 1;
2100                 enic->wq_count = 1;
2101                 enic->cq_count = 2;
2102                 enic->intr_count = 1;
2103
2104                 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_MSI);
2105
2106                 return 0;
2107         }
2108
2109         /* Next try INTx
2110          *
2111          * We need 1 RQ, 1 WQ, 2 CQs, and 3 INTRs
2112          * (the first INTR is used for WQ/RQ)
2113          * (the second INTR is used for WQ/RQ errors)
2114          * (the last INTR is used for notifications)
2115          */
2116
2117         if (enic->config.intr_mode < 3 &&
2118             enic->rq_count >= 1 &&
2119             enic->wq_count >= 1 &&
2120             enic->cq_count >= 2 &&
2121             enic->intr_count >= 3) {
2122
2123                 enic->rq_count = 1;
2124                 enic->wq_count = 1;
2125                 enic->cq_count = 2;
2126                 enic->intr_count = 3;
2127
2128                 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_INTX);
2129
2130                 return 0;
2131         }
2132
2133         vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN);
2134
2135         return -EINVAL;
2136 }
2137
2138 static void enic_clear_intr_mode(struct enic *enic)
2139 {
2140         switch (vnic_dev_get_intr_mode(enic->vdev)) {
2141         case VNIC_DEV_INTR_MODE_MSIX:
2142                 pci_disable_msix(enic->pdev);
2143                 break;
2144         case VNIC_DEV_INTR_MODE_MSI:
2145                 pci_disable_msi(enic->pdev);
2146                 break;
2147         default:
2148                 break;
2149         }
2150
2151         vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN);
2152 }
2153
2154 static const struct net_device_ops enic_netdev_dynamic_ops = {
2155         .ndo_open               = enic_open,
2156         .ndo_stop               = enic_stop,
2157         .ndo_start_xmit         = enic_hard_start_xmit,
2158         .ndo_get_stats64        = enic_get_stats,
2159         .ndo_validate_addr      = eth_validate_addr,
2160         .ndo_set_rx_mode        = enic_set_rx_mode,
2161         .ndo_set_mac_address    = enic_set_mac_address_dynamic,
2162         .ndo_change_mtu         = enic_change_mtu,
2163         .ndo_vlan_rx_add_vid    = enic_vlan_rx_add_vid,
2164         .ndo_vlan_rx_kill_vid   = enic_vlan_rx_kill_vid,
2165         .ndo_tx_timeout         = enic_tx_timeout,
2166         .ndo_set_vf_port        = enic_set_vf_port,
2167         .ndo_get_vf_port        = enic_get_vf_port,
2168         .ndo_set_vf_mac         = enic_set_vf_mac,
2169 #ifdef CONFIG_NET_POLL_CONTROLLER
2170         .ndo_poll_controller    = enic_poll_controller,
2171 #endif
2172 #ifdef CONFIG_RFS_ACCEL
2173         .ndo_rx_flow_steer      = enic_rx_flow_steer,
2174 #endif
2175 #ifdef CONFIG_NET_RX_BUSY_POLL
2176         .ndo_busy_poll          = enic_busy_poll,
2177 #endif
2178 };
2179
2180 static const struct net_device_ops enic_netdev_ops = {
2181         .ndo_open               = enic_open,
2182         .ndo_stop               = enic_stop,
2183         .ndo_start_xmit         = enic_hard_start_xmit,
2184         .ndo_get_stats64        = enic_get_stats,
2185         .ndo_validate_addr      = eth_validate_addr,
2186         .ndo_set_mac_address    = enic_set_mac_address,
2187         .ndo_set_rx_mode        = enic_set_rx_mode,
2188         .ndo_change_mtu         = enic_change_mtu,
2189         .ndo_vlan_rx_add_vid    = enic_vlan_rx_add_vid,
2190         .ndo_vlan_rx_kill_vid   = enic_vlan_rx_kill_vid,
2191         .ndo_tx_timeout         = enic_tx_timeout,
2192         .ndo_set_vf_port        = enic_set_vf_port,
2193         .ndo_get_vf_port        = enic_get_vf_port,
2194         .ndo_set_vf_mac         = enic_set_vf_mac,
2195 #ifdef CONFIG_NET_POLL_CONTROLLER
2196         .ndo_poll_controller    = enic_poll_controller,
2197 #endif
2198 #ifdef CONFIG_RFS_ACCEL
2199         .ndo_rx_flow_steer      = enic_rx_flow_steer,
2200 #endif
2201 #ifdef CONFIG_NET_RX_BUSY_POLL
2202         .ndo_busy_poll          = enic_busy_poll,
2203 #endif
2204 };
2205
2206 static void enic_dev_deinit(struct enic *enic)
2207 {
2208         unsigned int i;
2209
2210         for (i = 0; i < enic->rq_count; i++) {
2211                 napi_hash_del(&enic->napi[i]);
2212                 netif_napi_del(&enic->napi[i]);
2213         }
2214         if (vnic_dev_get_intr_mode(enic->vdev) == VNIC_DEV_INTR_MODE_MSIX)
2215                 for (i = 0; i < enic->wq_count; i++)
2216                         netif_napi_del(&enic->napi[enic_cq_wq(enic, i)]);
2217
2218         enic_free_vnic_resources(enic);
2219         enic_clear_intr_mode(enic);
2220 }
2221
2222 static int enic_dev_init(struct enic *enic)
2223 {
2224         struct device *dev = enic_get_dev(enic);
2225         struct net_device *netdev = enic->netdev;
2226         unsigned int i;
2227         int err;
2228
2229         /* Get interrupt coalesce timer info */
2230         err = enic_dev_intr_coal_timer_info(enic);
2231         if (err) {
2232                 dev_warn(dev, "Using default conversion factor for "
2233                         "interrupt coalesce timer\n");
2234                 vnic_dev_intr_coal_timer_info_default(enic->vdev);
2235         }
2236
2237         /* Get vNIC configuration
2238          */
2239
2240         err = enic_get_vnic_config(enic);
2241         if (err) {
2242                 dev_err(dev, "Get vNIC configuration failed, aborting\n");
2243                 return err;
2244         }
2245
2246         /* Get available resource counts
2247          */
2248
2249         enic_get_res_counts(enic);
2250
2251         /* Set interrupt mode based on resource counts and system
2252          * capabilities
2253          */
2254
2255         err = enic_set_intr_mode(enic);
2256         if (err) {
2257                 dev_err(dev, "Failed to set intr mode based on resource "
2258                         "counts and system capabilities, aborting\n");
2259                 return err;
2260         }
2261
2262         /* Allocate and configure vNIC resources
2263          */
2264
2265         err = enic_alloc_vnic_resources(enic);
2266         if (err) {
2267                 dev_err(dev, "Failed to alloc vNIC resources, aborting\n");
2268                 goto err_out_free_vnic_resources;
2269         }
2270
2271         enic_init_vnic_resources(enic);
2272
2273         err = enic_set_rss_nic_cfg(enic);
2274         if (err) {
2275                 dev_err(dev, "Failed to config nic, aborting\n");
2276                 goto err_out_free_vnic_resources;
2277         }
2278
2279         switch (vnic_dev_get_intr_mode(enic->vdev)) {
2280         default:
2281                 netif_napi_add(netdev, &enic->napi[0], enic_poll, 64);
2282                 napi_hash_add(&enic->napi[0]);
2283                 break;
2284         case VNIC_DEV_INTR_MODE_MSIX:
2285                 for (i = 0; i < enic->rq_count; i++) {
2286                         netif_napi_add(netdev, &enic->napi[i],
2287                                 enic_poll_msix_rq, NAPI_POLL_WEIGHT);
2288                         napi_hash_add(&enic->napi[i]);
2289                 }
2290                 for (i = 0; i < enic->wq_count; i++)
2291                         netif_napi_add(netdev, &enic->napi[enic_cq_wq(enic, i)],
2292                                        enic_poll_msix_wq, NAPI_POLL_WEIGHT);
2293                 break;
2294         }
2295
2296         return 0;
2297
2298 err_out_free_vnic_resources:
2299         enic_clear_intr_mode(enic);
2300         enic_free_vnic_resources(enic);
2301
2302         return err;
2303 }
2304
2305 static void enic_iounmap(struct enic *enic)
2306 {
2307         unsigned int i;
2308
2309         for (i = 0; i < ARRAY_SIZE(enic->bar); i++)
2310                 if (enic->bar[i].vaddr)
2311                         iounmap(enic->bar[i].vaddr);
2312 }
2313
2314 static int enic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2315 {
2316         struct device *dev = &pdev->dev;
2317         struct net_device *netdev;
2318         struct enic *enic;
2319         int using_dac = 0;
2320         unsigned int i;
2321         int err;
2322 #ifdef CONFIG_PCI_IOV
2323         int pos = 0;
2324 #endif
2325         int num_pps = 1;
2326
2327         /* Allocate net device structure and initialize.  Private
2328          * instance data is initialized to zero.
2329          */
2330
2331         netdev = alloc_etherdev_mqs(sizeof(struct enic),
2332                                     ENIC_RQ_MAX, ENIC_WQ_MAX);
2333         if (!netdev)
2334                 return -ENOMEM;
2335
2336         pci_set_drvdata(pdev, netdev);
2337
2338         SET_NETDEV_DEV(netdev, &pdev->dev);
2339
2340         enic = netdev_priv(netdev);
2341         enic->netdev = netdev;
2342         enic->pdev = pdev;
2343
2344         /* Setup PCI resources
2345          */
2346
2347         err = pci_enable_device_mem(pdev);
2348         if (err) {
2349                 dev_err(dev, "Cannot enable PCI device, aborting\n");
2350                 goto err_out_free_netdev;
2351         }
2352
2353         err = pci_request_regions(pdev, DRV_NAME);
2354         if (err) {
2355                 dev_err(dev, "Cannot request PCI regions, aborting\n");
2356                 goto err_out_disable_device;
2357         }
2358
2359         pci_set_master(pdev);
2360
2361         /* Query PCI controller on system for DMA addressing
2362          * limitation for the device.  Try 64-bit first, and
2363          * fail to 32-bit.
2364          */
2365
2366         err = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
2367         if (err) {
2368                 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
2369                 if (err) {
2370                         dev_err(dev, "No usable DMA configuration, aborting\n");
2371                         goto err_out_release_regions;
2372                 }
2373                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
2374                 if (err) {
2375                         dev_err(dev, "Unable to obtain %u-bit DMA "
2376                                 "for consistent allocations, aborting\n", 32);
2377                         goto err_out_release_regions;
2378                 }
2379         } else {
2380                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
2381                 if (err) {
2382                         dev_err(dev, "Unable to obtain %u-bit DMA "
2383                                 "for consistent allocations, aborting\n", 64);
2384                         goto err_out_release_regions;
2385                 }
2386                 using_dac = 1;
2387         }
2388
2389         /* Map vNIC resources from BAR0-5
2390          */
2391
2392         for (i = 0; i < ARRAY_SIZE(enic->bar); i++) {
2393                 if (!(pci_resource_flags(pdev, i) & IORESOURCE_MEM))
2394                         continue;
2395                 enic->bar[i].len = pci_resource_len(pdev, i);
2396                 enic->bar[i].vaddr = pci_iomap(pdev, i, enic->bar[i].len);
2397                 if (!enic->bar[i].vaddr) {
2398                         dev_err(dev, "Cannot memory-map BAR %d, aborting\n", i);
2399                         err = -ENODEV;
2400                         goto err_out_iounmap;
2401                 }
2402                 enic->bar[i].bus_addr = pci_resource_start(pdev, i);
2403         }
2404
2405         /* Register vNIC device
2406          */
2407
2408         enic->vdev = vnic_dev_register(NULL, enic, pdev, enic->bar,
2409                 ARRAY_SIZE(enic->bar));
2410         if (!enic->vdev) {
2411                 dev_err(dev, "vNIC registration failed, aborting\n");
2412                 err = -ENODEV;
2413                 goto err_out_iounmap;
2414         }
2415
2416 #ifdef CONFIG_PCI_IOV
2417         /* Get number of subvnics */
2418         pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_SRIOV);
2419         if (pos) {
2420                 pci_read_config_word(pdev, pos + PCI_SRIOV_TOTAL_VF,
2421                         &enic->num_vfs);
2422                 if (enic->num_vfs) {
2423                         err = pci_enable_sriov(pdev, enic->num_vfs);
2424                         if (err) {
2425                                 dev_err(dev, "SRIOV enable failed, aborting."
2426                                         " pci_enable_sriov() returned %d\n",
2427                                         err);
2428                                 goto err_out_vnic_unregister;
2429                         }
2430                         enic->priv_flags |= ENIC_SRIOV_ENABLED;
2431                         num_pps = enic->num_vfs;
2432                 }
2433         }
2434 #endif
2435
2436         /* Allocate structure for port profiles */
2437         enic->pp = kcalloc(num_pps, sizeof(*enic->pp), GFP_KERNEL);
2438         if (!enic->pp) {
2439                 err = -ENOMEM;
2440                 goto err_out_disable_sriov_pp;
2441         }
2442
2443         /* Issue device open to get device in known state
2444          */
2445
2446         err = enic_dev_open(enic);
2447         if (err) {
2448                 dev_err(dev, "vNIC dev open failed, aborting\n");
2449                 goto err_out_disable_sriov;
2450         }
2451
2452         /* Setup devcmd lock
2453          */
2454
2455         spin_lock_init(&enic->devcmd_lock);
2456         spin_lock_init(&enic->enic_api_lock);
2457
2458         /*
2459          * Set ingress vlan rewrite mode before vnic initialization
2460          */
2461
2462         err = enic_dev_set_ig_vlan_rewrite_mode(enic);
2463         if (err) {
2464                 dev_err(dev,
2465                         "Failed to set ingress vlan rewrite mode, aborting.\n");
2466                 goto err_out_dev_close;
2467         }
2468
2469         /* Issue device init to initialize the vnic-to-switch link.
2470          * We'll start with carrier off and wait for link UP
2471          * notification later to turn on carrier.  We don't need
2472          * to wait here for the vnic-to-switch link initialization
2473          * to complete; link UP notification is the indication that
2474          * the process is complete.
2475          */
2476
2477         netif_carrier_off(netdev);
2478
2479         /* Do not call dev_init for a dynamic vnic.
2480          * For a dynamic vnic, init_prov_info will be
2481          * called later by an upper layer.
2482          */
2483
2484         if (!enic_is_dynamic(enic)) {
2485                 err = vnic_dev_init(enic->vdev, 0);
2486                 if (err) {
2487                         dev_err(dev, "vNIC dev init failed, aborting\n");
2488                         goto err_out_dev_close;
2489                 }
2490         }
2491
2492         err = enic_dev_init(enic);
2493         if (err) {
2494                 dev_err(dev, "Device initialization failed, aborting\n");
2495                 goto err_out_dev_close;
2496         }
2497
2498         netif_set_real_num_tx_queues(netdev, enic->wq_count);
2499         netif_set_real_num_rx_queues(netdev, enic->rq_count);
2500
2501         /* Setup notification timer, HW reset task, and wq locks
2502          */
2503
2504         init_timer(&enic->notify_timer);
2505         enic->notify_timer.function = enic_notify_timer;
2506         enic->notify_timer.data = (unsigned long)enic;
2507
2508         enic_set_rx_coal_setting(enic);
2509         INIT_WORK(&enic->reset, enic_reset);
2510         INIT_WORK(&enic->change_mtu_work, enic_change_mtu_work);
2511
2512         for (i = 0; i < enic->wq_count; i++)
2513                 spin_lock_init(&enic->wq_lock[i]);
2514
2515         /* Register net device
2516          */
2517
2518         enic->port_mtu = enic->config.mtu;
2519         (void)enic_change_mtu(netdev, enic->port_mtu);
2520
2521         err = enic_set_mac_addr(netdev, enic->mac_addr);
2522         if (err) {
2523                 dev_err(dev, "Invalid MAC address, aborting\n");
2524                 goto err_out_dev_deinit;
2525         }
2526
2527         enic->tx_coalesce_usecs = enic->config.intr_timer_usec;
2528         /* rx coalesce time already got initialized. This gets used
2529          * if adaptive coal is turned off
2530          */
2531         enic->rx_coalesce_usecs = enic->tx_coalesce_usecs;
2532
2533         if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic))
2534                 netdev->netdev_ops = &enic_netdev_dynamic_ops;
2535         else
2536                 netdev->netdev_ops = &enic_netdev_ops;
2537
2538         netdev->watchdog_timeo = 2 * HZ;
2539         enic_set_ethtool_ops(netdev);
2540
2541         netdev->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX;
2542         if (ENIC_SETTING(enic, LOOP)) {
2543                 netdev->features &= ~NETIF_F_HW_VLAN_CTAG_TX;
2544                 enic->loop_enable = 1;
2545                 enic->loop_tag = enic->config.loop_tag;
2546                 dev_info(dev, "loopback tag=0x%04x\n", enic->loop_tag);
2547         }
2548         if (ENIC_SETTING(enic, TXCSUM))
2549                 netdev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM;
2550         if (ENIC_SETTING(enic, TSO))
2551                 netdev->hw_features |= NETIF_F_TSO |
2552                         NETIF_F_TSO6 | NETIF_F_TSO_ECN;
2553         if (ENIC_SETTING(enic, RSS))
2554                 netdev->hw_features |= NETIF_F_RXHASH;
2555         if (ENIC_SETTING(enic, RXCSUM))
2556                 netdev->hw_features |= NETIF_F_RXCSUM;
2557
2558         netdev->features |= netdev->hw_features;
2559
2560 #ifdef CONFIG_RFS_ACCEL
2561         netdev->hw_features |= NETIF_F_NTUPLE;
2562 #endif
2563
2564         if (using_dac)
2565                 netdev->features |= NETIF_F_HIGHDMA;
2566
2567         netdev->priv_flags |= IFF_UNICAST_FLT;
2568
2569         err = register_netdev(netdev);
2570         if (err) {
2571                 dev_err(dev, "Cannot register net device, aborting\n");
2572                 goto err_out_dev_deinit;
2573         }
2574         enic->rx_copybreak = RX_COPYBREAK_DEFAULT;
2575
2576         return 0;
2577
2578 err_out_dev_deinit:
2579         enic_dev_deinit(enic);
2580 err_out_dev_close:
2581         vnic_dev_close(enic->vdev);
2582 err_out_disable_sriov:
2583         kfree(enic->pp);
2584 err_out_disable_sriov_pp:
2585 #ifdef CONFIG_PCI_IOV
2586         if (enic_sriov_enabled(enic)) {
2587                 pci_disable_sriov(pdev);
2588                 enic->priv_flags &= ~ENIC_SRIOV_ENABLED;
2589         }
2590 err_out_vnic_unregister:
2591 #endif
2592         vnic_dev_unregister(enic->vdev);
2593 err_out_iounmap:
2594         enic_iounmap(enic);
2595 err_out_release_regions:
2596         pci_release_regions(pdev);
2597 err_out_disable_device:
2598         pci_disable_device(pdev);
2599 err_out_free_netdev:
2600         free_netdev(netdev);
2601
2602         return err;
2603 }
2604
2605 static void enic_remove(struct pci_dev *pdev)
2606 {
2607         struct net_device *netdev = pci_get_drvdata(pdev);
2608
2609         if (netdev) {
2610                 struct enic *enic = netdev_priv(netdev);
2611
2612                 cancel_work_sync(&enic->reset);
2613                 cancel_work_sync(&enic->change_mtu_work);
2614                 unregister_netdev(netdev);
2615                 enic_dev_deinit(enic);
2616                 vnic_dev_close(enic->vdev);
2617 #ifdef CONFIG_PCI_IOV
2618                 if (enic_sriov_enabled(enic)) {
2619                         pci_disable_sriov(pdev);
2620                         enic->priv_flags &= ~ENIC_SRIOV_ENABLED;
2621                 }
2622 #endif
2623                 kfree(enic->pp);
2624                 vnic_dev_unregister(enic->vdev);
2625                 enic_iounmap(enic);
2626                 pci_release_regions(pdev);
2627                 pci_disable_device(pdev);
2628                 free_netdev(netdev);
2629         }
2630 }
2631
2632 static struct pci_driver enic_driver = {
2633         .name = DRV_NAME,
2634         .id_table = enic_id_table,
2635         .probe = enic_probe,
2636         .remove = enic_remove,
2637 };
2638
2639 static int __init enic_init_module(void)
2640 {
2641         pr_info("%s, ver %s\n", DRV_DESCRIPTION, DRV_VERSION);
2642
2643         return pci_register_driver(&enic_driver);
2644 }
2645
2646 static void __exit enic_cleanup_module(void)
2647 {
2648         pci_unregister_driver(&enic_driver);
2649 }
2650
2651 module_init(enic_init_module);
2652 module_exit(enic_cleanup_module);