linux/drivers/scsi/fnic/vnic_dev.c
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   1/*
   2 * Copyright 2008 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#include <linux/kernel.h>
  20#include <linux/errno.h>
  21#include <linux/types.h>
  22#include <linux/pci.h>
  23#include <linux/delay.h>
  24#include <linux/if_ether.h>
  25#include <linux/slab.h>
  26#include "vnic_resource.h"
  27#include "vnic_devcmd.h"
  28#include "vnic_dev.h"
  29#include "vnic_stats.h"
  30#include "vnic_wq.h"
  31
  32struct devcmd2_controller {
  33        struct vnic_wq_ctrl *wq_ctrl;
  34        struct vnic_dev_ring results_ring;
  35        struct vnic_wq wq;
  36        struct vnic_devcmd2 *cmd_ring;
  37        struct devcmd2_result *result;
  38        u16 next_result;
  39        u16 result_size;
  40        int color;
  41};
  42
  43enum vnic_proxy_type {
  44        PROXY_NONE,
  45        PROXY_BY_BDF,
  46        PROXY_BY_INDEX,
  47};
  48
  49struct vnic_res {
  50        void __iomem *vaddr;
  51        unsigned int count;
  52};
  53
  54struct vnic_dev {
  55        void *priv;
  56        struct pci_dev *pdev;
  57        struct vnic_res res[RES_TYPE_MAX];
  58        enum vnic_dev_intr_mode intr_mode;
  59        struct vnic_devcmd __iomem *devcmd;
  60        struct vnic_devcmd_notify *notify;
  61        struct vnic_devcmd_notify notify_copy;
  62        dma_addr_t notify_pa;
  63        u32 *linkstatus;
  64        dma_addr_t linkstatus_pa;
  65        struct vnic_stats *stats;
  66        dma_addr_t stats_pa;
  67        struct vnic_devcmd_fw_info *fw_info;
  68        dma_addr_t fw_info_pa;
  69        enum vnic_proxy_type proxy;
  70        u32 proxy_index;
  71        u64 args[VNIC_DEVCMD_NARGS];
  72        struct devcmd2_controller *devcmd2;
  73        int (*devcmd_rtn)(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd,
  74                        int wait);
  75};
  76
  77#define VNIC_MAX_RES_HDR_SIZE \
  78        (sizeof(struct vnic_resource_header) + \
  79        sizeof(struct vnic_resource) * RES_TYPE_MAX)
  80#define VNIC_RES_STRIDE 128
  81
  82void *vnic_dev_priv(struct vnic_dev *vdev)
  83{
  84        return vdev->priv;
  85}
  86
  87static int vnic_dev_discover_res(struct vnic_dev *vdev,
  88        struct vnic_dev_bar *bar)
  89{
  90        struct vnic_resource_header __iomem *rh;
  91        struct vnic_resource __iomem *r;
  92        u8 type;
  93
  94        if (bar->len < VNIC_MAX_RES_HDR_SIZE) {
  95                printk(KERN_ERR "vNIC BAR0 res hdr length error\n");
  96                return -EINVAL;
  97        }
  98
  99        rh = bar->vaddr;
 100        if (!rh) {
 101                printk(KERN_ERR "vNIC BAR0 res hdr not mem-mapped\n");
 102                return -EINVAL;
 103        }
 104
 105        if (ioread32(&rh->magic) != VNIC_RES_MAGIC ||
 106            ioread32(&rh->version) != VNIC_RES_VERSION) {
 107                printk(KERN_ERR "vNIC BAR0 res magic/version error "
 108                        "exp (%lx/%lx) curr (%x/%x)\n",
 109                        VNIC_RES_MAGIC, VNIC_RES_VERSION,
 110                        ioread32(&rh->magic), ioread32(&rh->version));
 111                return -EINVAL;
 112        }
 113
 114        r = (struct vnic_resource __iomem *)(rh + 1);
 115
 116        while ((type = ioread8(&r->type)) != RES_TYPE_EOL) {
 117
 118                u8 bar_num = ioread8(&r->bar);
 119                u32 bar_offset = ioread32(&r->bar_offset);
 120                u32 count = ioread32(&r->count);
 121                u32 len;
 122
 123                r++;
 124
 125                if (bar_num != 0)  /* only mapping in BAR0 resources */
 126                        continue;
 127
 128                switch (type) {
 129                case RES_TYPE_WQ:
 130                case RES_TYPE_RQ:
 131                case RES_TYPE_CQ:
 132                case RES_TYPE_INTR_CTRL:
 133                        /* each count is stride bytes long */
 134                        len = count * VNIC_RES_STRIDE;
 135                        if (len + bar_offset > bar->len) {
 136                                printk(KERN_ERR "vNIC BAR0 resource %d "
 137                                        "out-of-bounds, offset 0x%x + "
 138                                        "size 0x%x > bar len 0x%lx\n",
 139                                        type, bar_offset,
 140                                        len,
 141                                        bar->len);
 142                                return -EINVAL;
 143                        }
 144                        break;
 145                case RES_TYPE_INTR_PBA_LEGACY:
 146                case RES_TYPE_DEVCMD2:
 147                case RES_TYPE_DEVCMD:
 148                        len = count;
 149                        break;
 150                default:
 151                        continue;
 152                }
 153
 154                vdev->res[type].count = count;
 155                vdev->res[type].vaddr = (char __iomem *)bar->vaddr + bar_offset;
 156        }
 157
 158        return 0;
 159}
 160
 161unsigned int vnic_dev_get_res_count(struct vnic_dev *vdev,
 162        enum vnic_res_type type)
 163{
 164        return vdev->res[type].count;
 165}
 166
 167void __iomem *vnic_dev_get_res(struct vnic_dev *vdev, enum vnic_res_type type,
 168        unsigned int index)
 169{
 170        if (!vdev->res[type].vaddr)
 171                return NULL;
 172
 173        switch (type) {
 174        case RES_TYPE_WQ:
 175        case RES_TYPE_RQ:
 176        case RES_TYPE_CQ:
 177        case RES_TYPE_INTR_CTRL:
 178                return (char __iomem *)vdev->res[type].vaddr +
 179                                        index * VNIC_RES_STRIDE;
 180        default:
 181                return (char __iomem *)vdev->res[type].vaddr;
 182        }
 183}
 184
 185unsigned int vnic_dev_desc_ring_size(struct vnic_dev_ring *ring,
 186                                     unsigned int desc_count,
 187                                     unsigned int desc_size)
 188{
 189        /* The base address of the desc rings must be 512 byte aligned.
 190         * Descriptor count is aligned to groups of 32 descriptors.  A
 191         * count of 0 means the maximum 4096 descriptors.  Descriptor
 192         * size is aligned to 16 bytes.
 193         */
 194
 195        unsigned int count_align = 32;
 196        unsigned int desc_align = 16;
 197
 198        ring->base_align = 512;
 199
 200        if (desc_count == 0)
 201                desc_count = 4096;
 202
 203        ring->desc_count = ALIGN(desc_count, count_align);
 204
 205        ring->desc_size = ALIGN(desc_size, desc_align);
 206
 207        ring->size = ring->desc_count * ring->desc_size;
 208        ring->size_unaligned = ring->size + ring->base_align;
 209
 210        return ring->size_unaligned;
 211}
 212
 213void vnic_dev_clear_desc_ring(struct vnic_dev_ring *ring)
 214{
 215        memset(ring->descs, 0, ring->size);
 216}
 217
 218int vnic_dev_alloc_desc_ring(struct vnic_dev *vdev, struct vnic_dev_ring *ring,
 219        unsigned int desc_count, unsigned int desc_size)
 220{
 221        vnic_dev_desc_ring_size(ring, desc_count, desc_size);
 222
 223        ring->descs_unaligned = dma_alloc_coherent(&vdev->pdev->dev,
 224                ring->size_unaligned,
 225                &ring->base_addr_unaligned, GFP_KERNEL);
 226
 227        if (!ring->descs_unaligned) {
 228                printk(KERN_ERR
 229                  "Failed to allocate ring (size=%d), aborting\n",
 230                        (int)ring->size);
 231                return -ENOMEM;
 232        }
 233
 234        ring->base_addr = ALIGN(ring->base_addr_unaligned,
 235                ring->base_align);
 236        ring->descs = (u8 *)ring->descs_unaligned +
 237                (ring->base_addr - ring->base_addr_unaligned);
 238
 239        vnic_dev_clear_desc_ring(ring);
 240
 241        ring->desc_avail = ring->desc_count - 1;
 242
 243        return 0;
 244}
 245
 246void vnic_dev_free_desc_ring(struct vnic_dev *vdev, struct vnic_dev_ring *ring)
 247{
 248        if (ring->descs) {
 249                dma_free_coherent(&vdev->pdev->dev,
 250                        ring->size_unaligned,
 251                        ring->descs_unaligned,
 252                        ring->base_addr_unaligned);
 253                ring->descs = NULL;
 254        }
 255}
 256
 257static int vnic_dev_cmd1(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd, int wait)
 258{
 259        struct vnic_devcmd __iomem *devcmd = vdev->devcmd;
 260        int delay;
 261        u32 status;
 262        static const int dev_cmd_err[] = {
 263                /* convert from fw's version of error.h to host's version */
 264                0,      /* ERR_SUCCESS */
 265                EINVAL, /* ERR_EINVAL */
 266                EFAULT, /* ERR_EFAULT */
 267                EPERM,  /* ERR_EPERM */
 268                EBUSY,  /* ERR_EBUSY */
 269        };
 270        int err;
 271        u64 *a0 = &vdev->args[0];
 272        u64 *a1 = &vdev->args[1];
 273
 274        status = ioread32(&devcmd->status);
 275        if (status & STAT_BUSY) {
 276                printk(KERN_ERR "Busy devcmd %d\n", _CMD_N(cmd));
 277                return -EBUSY;
 278        }
 279
 280        if (_CMD_DIR(cmd) & _CMD_DIR_WRITE) {
 281                writeq(*a0, &devcmd->args[0]);
 282                writeq(*a1, &devcmd->args[1]);
 283                wmb();
 284        }
 285
 286        iowrite32(cmd, &devcmd->cmd);
 287
 288        if ((_CMD_FLAGS(cmd) & _CMD_FLAGS_NOWAIT))
 289                        return 0;
 290
 291        for (delay = 0; delay < wait; delay++) {
 292
 293                udelay(100);
 294
 295                status = ioread32(&devcmd->status);
 296                if (!(status & STAT_BUSY)) {
 297
 298                        if (status & STAT_ERROR) {
 299                                err = dev_cmd_err[(int)readq(&devcmd->args[0])];
 300                                printk(KERN_ERR "Error %d devcmd %d\n",
 301                                        err, _CMD_N(cmd));
 302                                return -err;
 303                        }
 304
 305                        if (_CMD_DIR(cmd) & _CMD_DIR_READ) {
 306                                rmb();
 307                                *a0 = readq(&devcmd->args[0]);
 308                                *a1 = readq(&devcmd->args[1]);
 309                        }
 310
 311                        return 0;
 312                }
 313        }
 314
 315        printk(KERN_ERR "Timedout devcmd %d\n", _CMD_N(cmd));
 316        return -ETIMEDOUT;
 317}
 318
 319static int vnic_dev_cmd2(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd,
 320                int wait)
 321{
 322        struct devcmd2_controller *dc2c = vdev->devcmd2;
 323        struct devcmd2_result *result;
 324        u8 color;
 325        unsigned int i;
 326        int delay;
 327        int err;
 328        u32 fetch_index;
 329        u32 posted;
 330        u32 new_posted;
 331
 332        posted = ioread32(&dc2c->wq_ctrl->posted_index);
 333        fetch_index = ioread32(&dc2c->wq_ctrl->fetch_index);
 334
 335        if (posted == 0xFFFFFFFF || fetch_index == 0xFFFFFFFF) {
 336                /* Hardware surprise removal: return error */
 337                pr_err("%s: devcmd2 invalid posted or fetch index on cmd %d\n",
 338                                pci_name(vdev->pdev), _CMD_N(cmd));
 339                pr_err("%s: fetch index: %u, posted index: %u\n",
 340                                pci_name(vdev->pdev), fetch_index, posted);
 341
 342                return -ENODEV;
 343
 344        }
 345
 346        new_posted = (posted + 1) % DEVCMD2_RING_SIZE;
 347
 348        if (new_posted == fetch_index) {
 349                pr_err("%s: devcmd2 wq full while issuing cmd %d\n",
 350                                pci_name(vdev->pdev), _CMD_N(cmd));
 351                pr_err("%s: fetch index: %u, posted index: %u\n",
 352                                pci_name(vdev->pdev), fetch_index, posted);
 353                return -EBUSY;
 354
 355        }
 356        dc2c->cmd_ring[posted].cmd = cmd;
 357        dc2c->cmd_ring[posted].flags = 0;
 358
 359        if ((_CMD_FLAGS(cmd) & _CMD_FLAGS_NOWAIT))
 360                dc2c->cmd_ring[posted].flags |= DEVCMD2_FNORESULT;
 361        if (_CMD_DIR(cmd) & _CMD_DIR_WRITE) {
 362                for (i = 0; i < VNIC_DEVCMD_NARGS; i++)
 363                        dc2c->cmd_ring[posted].args[i] = vdev->args[i];
 364
 365        }
 366
 367        /* Adding write memory barrier prevents compiler and/or CPU
 368         * reordering, thus avoiding descriptor posting before
 369         * descriptor is initialized. Otherwise, hardware can read
 370         * stale descriptor fields.
 371         */
 372        wmb();
 373        iowrite32(new_posted, &dc2c->wq_ctrl->posted_index);
 374
 375        if (dc2c->cmd_ring[posted].flags & DEVCMD2_FNORESULT)
 376                return 0;
 377
 378        result = dc2c->result + dc2c->next_result;
 379        color = dc2c->color;
 380
 381        dc2c->next_result++;
 382        if (dc2c->next_result == dc2c->result_size) {
 383                dc2c->next_result = 0;
 384                dc2c->color = dc2c->color ? 0 : 1;
 385        }
 386
 387        for (delay = 0; delay < wait; delay++) {
 388                udelay(100);
 389                if (result->color == color) {
 390                        if (result->error) {
 391                                err = -(int) result->error;
 392                                if (err != ERR_ECMDUNKNOWN ||
 393                                                cmd != CMD_CAPABILITY)
 394                                        pr_err("%s:Error %d devcmd %d\n",
 395                                                pci_name(vdev->pdev),
 396                                                err, _CMD_N(cmd));
 397                                return err;
 398                        }
 399                        if (_CMD_DIR(cmd) & _CMD_DIR_READ) {
 400                                rmb(); /*prevent reorder while reding result*/
 401                                for (i = 0; i < VNIC_DEVCMD_NARGS; i++)
 402                                        vdev->args[i] = result->results[i];
 403                        }
 404                        return 0;
 405                }
 406        }
 407
 408        pr_err("%s:Timed out devcmd %d\n", pci_name(vdev->pdev), _CMD_N(cmd));
 409
 410        return -ETIMEDOUT;
 411}
 412
 413
 414static int vnic_dev_init_devcmd1(struct vnic_dev *vdev)
 415{
 416        vdev->devcmd = vnic_dev_get_res(vdev, RES_TYPE_DEVCMD, 0);
 417        if (!vdev->devcmd)
 418                return -ENODEV;
 419
 420        vdev->devcmd_rtn = &vnic_dev_cmd1;
 421        return 0;
 422}
 423
 424
 425static int vnic_dev_init_devcmd2(struct vnic_dev *vdev)
 426{
 427        int err;
 428        unsigned int fetch_index;
 429
 430        if (vdev->devcmd2)
 431                return 0;
 432
 433        vdev->devcmd2 = kzalloc(sizeof(*vdev->devcmd2), GFP_ATOMIC);
 434        if (!vdev->devcmd2)
 435                return -ENOMEM;
 436
 437        vdev->devcmd2->color = 1;
 438        vdev->devcmd2->result_size = DEVCMD2_RING_SIZE;
 439        err = vnic_wq_devcmd2_alloc(vdev, &vdev->devcmd2->wq,
 440                                DEVCMD2_RING_SIZE, DEVCMD2_DESC_SIZE);
 441        if (err)
 442                goto err_free_devcmd2;
 443
 444        fetch_index = ioread32(&vdev->devcmd2->wq.ctrl->fetch_index);
 445        if (fetch_index == 0xFFFFFFFF) { /* check for hardware gone  */
 446                pr_err("error in devcmd2 init");
 447                err = -ENODEV;
 448                goto err_free_wq;
 449        }
 450
 451        /*
 452         * Don't change fetch_index ever and
 453         * set posted_index same as fetch_index
 454         * when setting up the WQ for devcmd2.
 455         */
 456        vnic_wq_init_start(&vdev->devcmd2->wq, 0, fetch_index,
 457                        fetch_index, 0, 0);
 458
 459        vnic_wq_enable(&vdev->devcmd2->wq);
 460
 461        err = vnic_dev_alloc_desc_ring(vdev, &vdev->devcmd2->results_ring,
 462                        DEVCMD2_RING_SIZE, DEVCMD2_DESC_SIZE);
 463        if (err)
 464                goto err_disable_wq;
 465
 466        vdev->devcmd2->result =
 467                (struct devcmd2_result *) vdev->devcmd2->results_ring.descs;
 468        vdev->devcmd2->cmd_ring =
 469                (struct vnic_devcmd2 *) vdev->devcmd2->wq.ring.descs;
 470        vdev->devcmd2->wq_ctrl = vdev->devcmd2->wq.ctrl;
 471        vdev->args[0] = (u64) vdev->devcmd2->results_ring.base_addr |
 472                                VNIC_PADDR_TARGET;
 473        vdev->args[1] = DEVCMD2_RING_SIZE;
 474
 475        err = vnic_dev_cmd2(vdev, CMD_INITIALIZE_DEVCMD2, 1000);
 476        if (err)
 477                goto err_free_desc_ring;
 478
 479        vdev->devcmd_rtn = &vnic_dev_cmd2;
 480
 481        return 0;
 482
 483err_free_desc_ring:
 484        vnic_dev_free_desc_ring(vdev, &vdev->devcmd2->results_ring);
 485err_disable_wq:
 486        vnic_wq_disable(&vdev->devcmd2->wq);
 487err_free_wq:
 488        vnic_wq_free(&vdev->devcmd2->wq);
 489err_free_devcmd2:
 490        kfree(vdev->devcmd2);
 491        vdev->devcmd2 = NULL;
 492
 493        return err;
 494}
 495
 496
 497static void vnic_dev_deinit_devcmd2(struct vnic_dev *vdev)
 498{
 499        vnic_dev_free_desc_ring(vdev, &vdev->devcmd2->results_ring);
 500        vnic_wq_disable(&vdev->devcmd2->wq);
 501        vnic_wq_free(&vdev->devcmd2->wq);
 502        kfree(vdev->devcmd2);
 503        vdev->devcmd2 = NULL;
 504        vdev->devcmd_rtn = &vnic_dev_cmd1;
 505}
 506
 507
 508static int vnic_dev_cmd_no_proxy(struct vnic_dev *vdev,
 509        enum vnic_devcmd_cmd cmd, u64 *a0, u64 *a1, int wait)
 510{
 511        int err;
 512
 513        vdev->args[0] = *a0;
 514        vdev->args[1] = *a1;
 515
 516        err = (*vdev->devcmd_rtn)(vdev, cmd, wait);
 517
 518        *a0 = vdev->args[0];
 519        *a1 = vdev->args[1];
 520
 521        return err;
 522}
 523
 524
 525int vnic_dev_cmd(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd,
 526        u64 *a0, u64 *a1, int wait)
 527{
 528        memset(vdev->args, 0, sizeof(vdev->args));
 529
 530        switch (vdev->proxy) {
 531        case PROXY_NONE:
 532        default:
 533                return vnic_dev_cmd_no_proxy(vdev, cmd, a0, a1, wait);
 534        }
 535}
 536
 537
 538int vnic_dev_fw_info(struct vnic_dev *vdev,
 539        struct vnic_devcmd_fw_info **fw_info)
 540{
 541        u64 a0, a1 = 0;
 542        int wait = 1000;
 543        int err = 0;
 544
 545        if (!vdev->fw_info) {
 546                vdev->fw_info = dma_alloc_coherent(&vdev->pdev->dev,
 547                        sizeof(struct vnic_devcmd_fw_info),
 548                        &vdev->fw_info_pa, GFP_KERNEL);
 549                if (!vdev->fw_info)
 550                        return -ENOMEM;
 551
 552                a0 = vdev->fw_info_pa;
 553
 554                /* only get fw_info once and cache it */
 555                err = vnic_dev_cmd(vdev, CMD_MCPU_FW_INFO, &a0, &a1, wait);
 556        }
 557
 558        *fw_info = vdev->fw_info;
 559
 560        return err;
 561}
 562
 563int vnic_dev_spec(struct vnic_dev *vdev, unsigned int offset, unsigned int size,
 564        void *value)
 565{
 566        u64 a0, a1;
 567        int wait = 1000;
 568        int err;
 569
 570        a0 = offset;
 571        a1 = size;
 572
 573        err = vnic_dev_cmd(vdev, CMD_DEV_SPEC, &a0, &a1, wait);
 574
 575        switch (size) {
 576        case 1:
 577                *(u8 *)value = (u8)a0;
 578                break;
 579        case 2:
 580                *(u16 *)value = (u16)a0;
 581                break;
 582        case 4:
 583                *(u32 *)value = (u32)a0;
 584                break;
 585        case 8:
 586                *(u64 *)value = a0;
 587                break;
 588        default:
 589                BUG();
 590                break;
 591        }
 592
 593        return err;
 594}
 595
 596int vnic_dev_stats_clear(struct vnic_dev *vdev)
 597{
 598        u64 a0 = 0, a1 = 0;
 599        int wait = 1000;
 600        return vnic_dev_cmd(vdev, CMD_STATS_CLEAR, &a0, &a1, wait);
 601}
 602
 603int vnic_dev_stats_dump(struct vnic_dev *vdev, struct vnic_stats **stats)
 604{
 605        u64 a0, a1;
 606        int wait = 1000;
 607
 608        if (!vdev->stats) {
 609                vdev->stats = dma_alloc_coherent(&vdev->pdev->dev,
 610                        sizeof(struct vnic_stats), &vdev->stats_pa, GFP_KERNEL);
 611                if (!vdev->stats)
 612                        return -ENOMEM;
 613        }
 614
 615        *stats = vdev->stats;
 616        a0 = vdev->stats_pa;
 617        a1 = sizeof(struct vnic_stats);
 618
 619        return vnic_dev_cmd(vdev, CMD_STATS_DUMP, &a0, &a1, wait);
 620}
 621
 622int vnic_dev_close(struct vnic_dev *vdev)
 623{
 624        u64 a0 = 0, a1 = 0;
 625        int wait = 1000;
 626        return vnic_dev_cmd(vdev, CMD_CLOSE, &a0, &a1, wait);
 627}
 628
 629int vnic_dev_enable(struct vnic_dev *vdev)
 630{
 631        u64 a0 = 0, a1 = 0;
 632        int wait = 1000;
 633        return vnic_dev_cmd(vdev, CMD_ENABLE, &a0, &a1, wait);
 634}
 635
 636int vnic_dev_disable(struct vnic_dev *vdev)
 637{
 638        u64 a0 = 0, a1 = 0;
 639        int wait = 1000;
 640        return vnic_dev_cmd(vdev, CMD_DISABLE, &a0, &a1, wait);
 641}
 642
 643int vnic_dev_open(struct vnic_dev *vdev, int arg)
 644{
 645        u64 a0 = (u32)arg, a1 = 0;
 646        int wait = 1000;
 647        return vnic_dev_cmd(vdev, CMD_OPEN, &a0, &a1, wait);
 648}
 649
 650int vnic_dev_open_done(struct vnic_dev *vdev, int *done)
 651{
 652        u64 a0 = 0, a1 = 0;
 653        int wait = 1000;
 654        int err;
 655
 656        *done = 0;
 657
 658        err = vnic_dev_cmd(vdev, CMD_OPEN_STATUS, &a0, &a1, wait);
 659        if (err)
 660                return err;
 661
 662        *done = (a0 == 0);
 663
 664        return 0;
 665}
 666
 667int vnic_dev_soft_reset(struct vnic_dev *vdev, int arg)
 668{
 669        u64 a0 = (u32)arg, a1 = 0;
 670        int wait = 1000;
 671        return vnic_dev_cmd(vdev, CMD_SOFT_RESET, &a0, &a1, wait);
 672}
 673
 674int vnic_dev_soft_reset_done(struct vnic_dev *vdev, int *done)
 675{
 676        u64 a0 = 0, a1 = 0;
 677        int wait = 1000;
 678        int err;
 679
 680        *done = 0;
 681
 682        err = vnic_dev_cmd(vdev, CMD_SOFT_RESET_STATUS, &a0, &a1, wait);
 683        if (err)
 684                return err;
 685
 686        *done = (a0 == 0);
 687
 688        return 0;
 689}
 690
 691int vnic_dev_hang_notify(struct vnic_dev *vdev)
 692{
 693        u64 a0 = 0, a1 = 0;
 694        int wait = 1000;
 695        return vnic_dev_cmd(vdev, CMD_HANG_NOTIFY, &a0, &a1, wait);
 696}
 697
 698int vnic_dev_mac_addr(struct vnic_dev *vdev, u8 *mac_addr)
 699{
 700        u64 a[2] = {};
 701        int wait = 1000;
 702        int err, i;
 703
 704        for (i = 0; i < ETH_ALEN; i++)
 705                mac_addr[i] = 0;
 706
 707        err = vnic_dev_cmd(vdev, CMD_MAC_ADDR, &a[0], &a[1], wait);
 708        if (err)
 709                return err;
 710
 711        for (i = 0; i < ETH_ALEN; i++)
 712                mac_addr[i] = ((u8 *)&a)[i];
 713
 714        return 0;
 715}
 716
 717void vnic_dev_packet_filter(struct vnic_dev *vdev, int directed, int multicast,
 718        int broadcast, int promisc, int allmulti)
 719{
 720        u64 a0, a1 = 0;
 721        int wait = 1000;
 722        int err;
 723
 724        a0 = (directed ? CMD_PFILTER_DIRECTED : 0) |
 725             (multicast ? CMD_PFILTER_MULTICAST : 0) |
 726             (broadcast ? CMD_PFILTER_BROADCAST : 0) |
 727             (promisc ? CMD_PFILTER_PROMISCUOUS : 0) |
 728             (allmulti ? CMD_PFILTER_ALL_MULTICAST : 0);
 729
 730        err = vnic_dev_cmd(vdev, CMD_PACKET_FILTER, &a0, &a1, wait);
 731        if (err)
 732                printk(KERN_ERR "Can't set packet filter\n");
 733}
 734
 735void vnic_dev_add_addr(struct vnic_dev *vdev, u8 *addr)
 736{
 737        u64 a[2] = {};
 738        int wait = 1000;
 739        int err;
 740        int i;
 741
 742        for (i = 0; i < ETH_ALEN; i++)
 743                ((u8 *)&a)[i] = addr[i];
 744
 745        err = vnic_dev_cmd(vdev, CMD_ADDR_ADD, &a[0], &a[1], wait);
 746        if (err)
 747                pr_err("Can't add addr [%pM], %d\n", addr, err);
 748}
 749
 750void vnic_dev_del_addr(struct vnic_dev *vdev, u8 *addr)
 751{
 752        u64 a[2] = {};
 753        int wait = 1000;
 754        int err;
 755        int i;
 756
 757        for (i = 0; i < ETH_ALEN; i++)
 758                ((u8 *)&a)[i] = addr[i];
 759
 760        err = vnic_dev_cmd(vdev, CMD_ADDR_DEL, &a[0], &a[1], wait);
 761        if (err)
 762                pr_err("Can't del addr [%pM], %d\n", addr, err);
 763}
 764
 765int vnic_dev_notify_set(struct vnic_dev *vdev, u16 intr)
 766{
 767        u64 a0, a1;
 768        int wait = 1000;
 769
 770        if (!vdev->notify) {
 771                vdev->notify = dma_alloc_coherent(&vdev->pdev->dev,
 772                        sizeof(struct vnic_devcmd_notify),
 773                        &vdev->notify_pa, GFP_KERNEL);
 774                if (!vdev->notify)
 775                        return -ENOMEM;
 776        }
 777
 778        a0 = vdev->notify_pa;
 779        a1 = ((u64)intr << 32) & 0x0000ffff00000000ULL;
 780        a1 += sizeof(struct vnic_devcmd_notify);
 781
 782        return vnic_dev_cmd(vdev, CMD_NOTIFY, &a0, &a1, wait);
 783}
 784
 785void vnic_dev_notify_unset(struct vnic_dev *vdev)
 786{
 787        u64 a0, a1;
 788        int wait = 1000;
 789
 790        a0 = 0;  /* paddr = 0 to unset notify buffer */
 791        a1 = 0x0000ffff00000000ULL; /* intr num = -1 to unreg for intr */
 792        a1 += sizeof(struct vnic_devcmd_notify);
 793
 794        vnic_dev_cmd(vdev, CMD_NOTIFY, &a0, &a1, wait);
 795}
 796
 797static int vnic_dev_notify_ready(struct vnic_dev *vdev)
 798{
 799        u32 *words;
 800        unsigned int nwords = sizeof(struct vnic_devcmd_notify) / 4;
 801        unsigned int i;
 802        u32 csum;
 803
 804        if (!vdev->notify)
 805                return 0;
 806
 807        do {
 808                csum = 0;
 809                memcpy(&vdev->notify_copy, vdev->notify,
 810                        sizeof(struct vnic_devcmd_notify));
 811                words = (u32 *)&vdev->notify_copy;
 812                for (i = 1; i < nwords; i++)
 813                        csum += words[i];
 814        } while (csum != words[0]);
 815
 816        return 1;
 817}
 818
 819int vnic_dev_init(struct vnic_dev *vdev, int arg)
 820{
 821        u64 a0 = (u32)arg, a1 = 0;
 822        int wait = 1000;
 823        return vnic_dev_cmd(vdev, CMD_INIT, &a0, &a1, wait);
 824}
 825
 826u16 vnic_dev_set_default_vlan(struct vnic_dev *vdev, u16 new_default_vlan)
 827{
 828        u64 a0 = new_default_vlan, a1 = 0;
 829        int wait = 1000;
 830        int old_vlan = 0;
 831
 832        old_vlan = vnic_dev_cmd(vdev, CMD_SET_DEFAULT_VLAN, &a0, &a1, wait);
 833        return (u16)old_vlan;
 834}
 835
 836int vnic_dev_link_status(struct vnic_dev *vdev)
 837{
 838        if (vdev->linkstatus)
 839                return *vdev->linkstatus;
 840
 841        if (!vnic_dev_notify_ready(vdev))
 842                return 0;
 843
 844        return vdev->notify_copy.link_state;
 845}
 846
 847u32 vnic_dev_port_speed(struct vnic_dev *vdev)
 848{
 849        if (!vnic_dev_notify_ready(vdev))
 850                return 0;
 851
 852        return vdev->notify_copy.port_speed;
 853}
 854
 855u32 vnic_dev_msg_lvl(struct vnic_dev *vdev)
 856{
 857        if (!vnic_dev_notify_ready(vdev))
 858                return 0;
 859
 860        return vdev->notify_copy.msglvl;
 861}
 862
 863u32 vnic_dev_mtu(struct vnic_dev *vdev)
 864{
 865        if (!vnic_dev_notify_ready(vdev))
 866                return 0;
 867
 868        return vdev->notify_copy.mtu;
 869}
 870
 871u32 vnic_dev_link_down_cnt(struct vnic_dev *vdev)
 872{
 873        if (!vnic_dev_notify_ready(vdev))
 874                return 0;
 875
 876        return vdev->notify_copy.link_down_cnt;
 877}
 878
 879void vnic_dev_set_intr_mode(struct vnic_dev *vdev,
 880        enum vnic_dev_intr_mode intr_mode)
 881{
 882        vdev->intr_mode = intr_mode;
 883}
 884
 885enum vnic_dev_intr_mode vnic_dev_get_intr_mode(
 886        struct vnic_dev *vdev)
 887{
 888        return vdev->intr_mode;
 889}
 890
 891void vnic_dev_unregister(struct vnic_dev *vdev)
 892{
 893        if (vdev) {
 894                if (vdev->notify)
 895                        dma_free_coherent(&vdev->pdev->dev,
 896                                sizeof(struct vnic_devcmd_notify),
 897                                vdev->notify,
 898                                vdev->notify_pa);
 899                if (vdev->linkstatus)
 900                        dma_free_coherent(&vdev->pdev->dev,
 901                                sizeof(u32),
 902                                vdev->linkstatus,
 903                                vdev->linkstatus_pa);
 904                if (vdev->stats)
 905                        dma_free_coherent(&vdev->pdev->dev,
 906                                sizeof(struct vnic_stats),
 907                                vdev->stats, vdev->stats_pa);
 908                if (vdev->fw_info)
 909                        dma_free_coherent(&vdev->pdev->dev,
 910                                sizeof(struct vnic_devcmd_fw_info),
 911                                vdev->fw_info, vdev->fw_info_pa);
 912                if (vdev->devcmd2)
 913                        vnic_dev_deinit_devcmd2(vdev);
 914                kfree(vdev);
 915        }
 916}
 917
 918struct vnic_dev *vnic_dev_register(struct vnic_dev *vdev,
 919        void *priv, struct pci_dev *pdev, struct vnic_dev_bar *bar)
 920{
 921        if (!vdev) {
 922                vdev = kzalloc(sizeof(struct vnic_dev), GFP_KERNEL);
 923                if (!vdev)
 924                        return NULL;
 925        }
 926
 927        vdev->priv = priv;
 928        vdev->pdev = pdev;
 929
 930        if (vnic_dev_discover_res(vdev, bar))
 931                goto err_out;
 932
 933        return vdev;
 934
 935err_out:
 936        vnic_dev_unregister(vdev);
 937        return NULL;
 938}
 939
 940int vnic_dev_cmd_init(struct vnic_dev *vdev)
 941{
 942        int err;
 943        void *p;
 944
 945        p = vnic_dev_get_res(vdev, RES_TYPE_DEVCMD2, 0);
 946        if (p) {
 947                pr_err("fnic: DEVCMD2 resource found!\n");
 948                err = vnic_dev_init_devcmd2(vdev);
 949        } else {
 950                pr_err("fnic: DEVCMD2 not found, fall back to Devcmd\n");
 951                err = vnic_dev_init_devcmd1(vdev);
 952        }
 953
 954        return err;
 955}
 956
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