LXR linux/drivers/scsi/fnic/fnic

   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#include <linux/errno.h>
  19#include <linux/types.h>
  20#include <linux/pci.h>
  21#include "wq_enet_desc.h"
  22#include "rq_enet_desc.h"
  23#include "cq_enet_desc.h"
  24#include "vnic_resource.h"
  25#include "vnic_dev.h"
  26#include "vnic_wq.h"
  27#include "vnic_rq.h"
  28#include "vnic_cq.h"
  29#include "vnic_intr.h"
  30#include "vnic_stats.h"
  31#include "vnic_nic.h"
  32#include "fnic.h"
  33
  34int fnic_get_vnic_config(struct fnic *fnic)
  35{
  36        struct vnic_fc_config *c = &fnic->config;
  37        int err;
  38
  39#define GET_CONFIG(m) \
  40        do { \
  41                err = vnic_dev_spec(fnic->vdev, \
  42                                    offsetof(struct vnic_fc_config, m), \
  43                                    sizeof(c->m), &c->m); \
  44                if (err) { \
  45                        shost_printk(KERN_ERR, fnic->lport->host, \
  46                                     "Error getting %s, %d\n", #m, \
  47                                     err); \
  48                        return err; \
  49                } \
  50        } while (0);
  51
  52        GET_CONFIG(node_wwn);
  53        GET_CONFIG(port_wwn);
  54        GET_CONFIG(wq_enet_desc_count);
  55        GET_CONFIG(wq_copy_desc_count);
  56        GET_CONFIG(rq_desc_count);
  57        GET_CONFIG(maxdatafieldsize);
  58        GET_CONFIG(ed_tov);
  59        GET_CONFIG(ra_tov);
  60        GET_CONFIG(intr_timer);
  61        GET_CONFIG(intr_timer_type);
  62        GET_CONFIG(flags);
  63        GET_CONFIG(flogi_retries);
  64        GET_CONFIG(flogi_timeout);
  65        GET_CONFIG(plogi_retries);
  66        GET_CONFIG(plogi_timeout);
  67        GET_CONFIG(io_throttle_count);
  68        GET_CONFIG(link_down_timeout);
  69        GET_CONFIG(port_down_timeout);
  70        GET_CONFIG(port_down_io_retries);
  71        GET_CONFIG(luns_per_tgt);
  72
  73        c->wq_enet_desc_count =
  74                min_t(u32, VNIC_FNIC_WQ_DESCS_MAX,
  75                      max_t(u32, VNIC_FNIC_WQ_DESCS_MIN,
  76                            c->wq_enet_desc_count));
  77        c->wq_enet_desc_count = ALIGN(c->wq_enet_desc_count, 16);
  78
  79        c->wq_copy_desc_count =
  80                min_t(u32, VNIC_FNIC_WQ_COPY_DESCS_MAX,
  81                      max_t(u32, VNIC_FNIC_WQ_COPY_DESCS_MIN,
  82                            c->wq_copy_desc_count));
  83        c->wq_copy_desc_count = ALIGN(c->wq_copy_desc_count, 16);
  84
  85        c->rq_desc_count =
  86                min_t(u32, VNIC_FNIC_RQ_DESCS_MAX,
  87                      max_t(u32, VNIC_FNIC_RQ_DESCS_MIN,
  88                            c->rq_desc_count));
  89        c->rq_desc_count = ALIGN(c->rq_desc_count, 16);
  90
  91        c->maxdatafieldsize =
  92                min_t(u16, VNIC_FNIC_MAXDATAFIELDSIZE_MAX,
  93                      max_t(u16, VNIC_FNIC_MAXDATAFIELDSIZE_MIN,
  94                            c->maxdatafieldsize));
  95        c->ed_tov =
  96                min_t(u32, VNIC_FNIC_EDTOV_MAX,
  97                      max_t(u32, VNIC_FNIC_EDTOV_MIN,
  98                            c->ed_tov));
  99
 100        c->ra_tov =
 101                min_t(u32, VNIC_FNIC_RATOV_MAX,
 102                      max_t(u32, VNIC_FNIC_RATOV_MIN,
 103                            c->ra_tov));
 104
 105        c->flogi_retries =
 106                min_t(u32, VNIC_FNIC_FLOGI_RETRIES_MAX, c->flogi_retries);
 107
 108        c->flogi_timeout =
 109                min_t(u32, VNIC_FNIC_FLOGI_TIMEOUT_MAX,
 110                      max_t(u32, VNIC_FNIC_FLOGI_TIMEOUT_MIN,
 111                            c->flogi_timeout));
 112
 113        c->plogi_retries =
 114                min_t(u32, VNIC_FNIC_PLOGI_RETRIES_MAX, c->plogi_retries);
 115
 116        c->plogi_timeout =
 117                min_t(u32, VNIC_FNIC_PLOGI_TIMEOUT_MAX,
 118                      max_t(u32, VNIC_FNIC_PLOGI_TIMEOUT_MIN,
 119                            c->plogi_timeout));
 120
 121        c->io_throttle_count =
 122                min_t(u32, VNIC_FNIC_IO_THROTTLE_COUNT_MAX,
 123                      max_t(u32, VNIC_FNIC_IO_THROTTLE_COUNT_MIN,
 124                            c->io_throttle_count));
 125
 126        c->link_down_timeout =
 127                min_t(u32, VNIC_FNIC_LINK_DOWN_TIMEOUT_MAX,
 128                      c->link_down_timeout);
 129
 130        c->port_down_timeout =
 131                min_t(u32, VNIC_FNIC_PORT_DOWN_TIMEOUT_MAX,
 132                      c->port_down_timeout);
 133
 134        c->port_down_io_retries =
 135                min_t(u32, VNIC_FNIC_PORT_DOWN_IO_RETRIES_MAX,
 136                      c->port_down_io_retries);
 137
 138        c->luns_per_tgt =
 139                min_t(u32, VNIC_FNIC_LUNS_PER_TARGET_MAX,
 140                      max_t(u32, VNIC_FNIC_LUNS_PER_TARGET_MIN,
 141                            c->luns_per_tgt));
 142
 143        c->intr_timer = min_t(u16, VNIC_INTR_TIMER_MAX, c->intr_timer);
 144        c->intr_timer_type = c->intr_timer_type;
 145
 146        shost_printk(KERN_INFO, fnic->lport->host,
 147                     "vNIC MAC addr %pM "
 148                     "wq/wq_copy/rq %d/%d/%d\n",
 149                     fnic->ctlr.ctl_src_addr,
 150                     c->wq_enet_desc_count, c->wq_copy_desc_count,
 151                     c->rq_desc_count);
 152        shost_printk(KERN_INFO, fnic->lport->host,
 153                     "vNIC node wwn %llx port wwn %llx\n",
 154                     c->node_wwn, c->port_wwn);
 155        shost_printk(KERN_INFO, fnic->lport->host,
 156                     "vNIC ed_tov %d ra_tov %d\n",
 157                     c->ed_tov, c->ra_tov);
 158        shost_printk(KERN_INFO, fnic->lport->host,
 159                     "vNIC mtu %d intr timer %d\n",
 160                     c->maxdatafieldsize, c->intr_timer);
 161        shost_printk(KERN_INFO, fnic->lport->host,
 162                     "vNIC flags 0x%x luns per tgt %d\n",
 163                     c->flags, c->luns_per_tgt);
 164        shost_printk(KERN_INFO, fnic->lport->host,
 165                     "vNIC flogi_retries %d flogi timeout %d\n",
 166                     c->flogi_retries, c->flogi_timeout);
 167        shost_printk(KERN_INFO, fnic->lport->host,
 168                     "vNIC plogi retries %d plogi timeout %d\n",
 169                     c->plogi_retries, c->plogi_timeout);
 170        shost_printk(KERN_INFO, fnic->lport->host,
 171                     "vNIC io throttle count %d link dn timeout %d\n",
 172                     c->io_throttle_count, c->link_down_timeout);
 173        shost_printk(KERN_INFO, fnic->lport->host,
 174                     "vNIC port dn io retries %d port dn timeout %d\n",
 175                     c->port_down_io_retries, c->port_down_timeout);
 176
 177        return 0;
 178}
 179
 180int fnic_set_nic_config(struct fnic *fnic, u8 rss_default_cpu,
 181                        u8 rss_hash_type,
 182                        u8 rss_hash_bits, u8 rss_base_cpu, u8 rss_enable,
 183                        u8 tso_ipid_split_en, u8 ig_vlan_strip_en)
 184{
 185        u64 a0, a1;
 186        u32 nic_cfg;
 187        int wait = 1000;
 188
 189        vnic_set_nic_cfg(&nic_cfg, rss_default_cpu,
 190                rss_hash_type, rss_hash_bits, rss_base_cpu,
 191                rss_enable, tso_ipid_split_en, ig_vlan_strip_en);
 192
 193        a0 = nic_cfg;
 194        a1 = 0;
 195
 196        return vnic_dev_cmd(fnic->vdev, CMD_NIC_CFG, &a0, &a1, wait);
 197}
 198
 199void fnic_get_res_counts(struct fnic *fnic)
 200{
 201        fnic->wq_count = vnic_dev_get_res_count(fnic->vdev, RES_TYPE_WQ);
 202        fnic->raw_wq_count = fnic->wq_count - 1;
 203        fnic->wq_copy_count = fnic->wq_count - fnic->raw_wq_count;
 204        fnic->rq_count = vnic_dev_get_res_count(fnic->vdev, RES_TYPE_RQ);
 205        fnic->cq_count = vnic_dev_get_res_count(fnic->vdev, RES_TYPE_CQ);
 206        fnic->intr_count = vnic_dev_get_res_count(fnic->vdev,
 207                RES_TYPE_INTR_CTRL);
 208}
 209
 210void fnic_free_vnic_resources(struct fnic *fnic)
 211{
 212        unsigned int i;
 213
 214        for (i = 0; i < fnic->raw_wq_count; i++)
 215                vnic_wq_free(&fnic->wq[i]);
 216
 217        for (i = 0; i < fnic->wq_copy_count; i++)
 218                vnic_wq_copy_free(&fnic->wq_copy[i]);
 219
 220        for (i = 0; i < fnic->rq_count; i++)
 221                vnic_rq_free(&fnic->rq[i]);
 222
 223        for (i = 0; i < fnic->cq_count; i++)
 224                vnic_cq_free(&fnic->cq[i]);
 225
 226        for (i = 0; i < fnic->intr_count; i++)
 227                vnic_intr_free(&fnic->intr[i]);
 228}
 229
 230int fnic_alloc_vnic_resources(struct fnic *fnic)
 231{
 232        enum vnic_dev_intr_mode intr_mode;
 233        unsigned int mask_on_assertion;
 234        unsigned int interrupt_offset;
 235        unsigned int error_interrupt_enable;
 236        unsigned int error_interrupt_offset;
 237        unsigned int i, cq_index;
 238        unsigned int wq_copy_cq_desc_count;
 239        int err;
 240
 241        intr_mode = vnic_dev_get_intr_mode(fnic->vdev);
 242
 243        shost_printk(KERN_INFO, fnic->lport->host, "vNIC interrupt mode: %s\n",
 244                     intr_mode == VNIC_DEV_INTR_MODE_INTX ? "legacy PCI INTx" :
 245                     intr_mode == VNIC_DEV_INTR_MODE_MSI ? "MSI" :
 246                     intr_mode == VNIC_DEV_INTR_MODE_MSIX ?
 247                     "MSI-X" : "unknown");
 248
 249        shost_printk(KERN_INFO, fnic->lport->host, "vNIC resources avail: "
 250                     "wq %d cp_wq %d raw_wq %d rq %d cq %d intr %d\n",
 251                     fnic->wq_count, fnic->wq_copy_count, fnic->raw_wq_count,
 252                     fnic->rq_count, fnic->cq_count, fnic->intr_count);
 253
 254        /* Allocate Raw WQ used for FCS frames */
 255        for (i = 0; i < fnic->raw_wq_count; i++) {
 256                err = vnic_wq_alloc(fnic->vdev, &fnic->wq[i], i,
 257                        fnic->config.wq_enet_desc_count,
 258                        sizeof(struct wq_enet_desc));
 259                if (err)
 260                        goto err_out_cleanup;
 261        }
 262
 263        /* Allocate Copy WQs used for SCSI IOs */
 264        for (i = 0; i < fnic->wq_copy_count; i++) {
 265                err = vnic_wq_copy_alloc(fnic->vdev, &fnic->wq_copy[i],
 266                        (fnic->raw_wq_count + i),
 267                        fnic->config.wq_copy_desc_count,
 268                        sizeof(struct fcpio_host_req));
 269                if (err)
 270                        goto err_out_cleanup;
 271        }
 272
 273        /* RQ for receiving FCS frames */
 274        for (i = 0; i < fnic->rq_count; i++) {
 275                err = vnic_rq_alloc(fnic->vdev, &fnic->rq[i], i,
 276                        fnic->config.rq_desc_count,
 277                        sizeof(struct rq_enet_desc));
 278                if (err)
 279                        goto err_out_cleanup;
 280        }
 281
 282        /* CQ for each RQ */
 283        for (i = 0; i < fnic->rq_count; i++) {
 284                cq_index = i;
 285                err = vnic_cq_alloc(fnic->vdev,
 286                        &fnic->cq[cq_index], cq_index,
 287                        fnic->config.rq_desc_count,
 288                        sizeof(struct cq_enet_rq_desc));
 289                if (err)
 290                        goto err_out_cleanup;
 291        }
 292
 293        /* CQ for each WQ */
 294        for (i = 0; i < fnic->raw_wq_count; i++) {
 295                cq_index = fnic->rq_count + i;
 296                err = vnic_cq_alloc(fnic->vdev, &fnic->cq[cq_index], cq_index,
 297                        fnic->config.wq_enet_desc_count,
 298                        sizeof(struct cq_enet_wq_desc));
 299                if (err)
 300                        goto err_out_cleanup;
 301        }
 302
 303        /* CQ for each COPY WQ */
 304        wq_copy_cq_desc_count = (fnic->config.wq_copy_desc_count * 3);
 305        for (i = 0; i < fnic->wq_copy_count; i++) {
 306                cq_index = fnic->raw_wq_count + fnic->rq_count + i;
 307                err = vnic_cq_alloc(fnic->vdev, &fnic->cq[cq_index],
 308                        cq_index,
 309                        wq_copy_cq_desc_count,
 310                        sizeof(struct fcpio_fw_req));
 311                if (err)
 312                        goto err_out_cleanup;
 313        }
 314
 315        for (i = 0; i < fnic->intr_count; i++) {
 316                err = vnic_intr_alloc(fnic->vdev, &fnic->intr[i], i);
 317                if (err)
 318                        goto err_out_cleanup;
 319        }
 320
 321        fnic->legacy_pba = vnic_dev_get_res(fnic->vdev,
 322                                RES_TYPE_INTR_PBA_LEGACY, 0);
 323
 324        if (!fnic->legacy_pba && intr_mode == VNIC_DEV_INTR_MODE_INTX) {
 325                shost_printk(KERN_ERR, fnic->lport->host,
 326                             "Failed to hook legacy pba resource\n");
 327                err = -ENODEV;
 328                goto err_out_cleanup;
 329        }
 330
 331        /*
 332         * Init RQ/WQ resources.
 333         *
 334         * RQ[0 to n-1] point to CQ[0 to n-1]
 335         * WQ[0 to m-1] point to CQ[n to n+m-1]
 336         * WQ_COPY[0 to k-1] points to CQ[n+m to n+m+k-1]
 337         *
 338         * Note for copy wq we always initialize with cq_index = 0
 339         *
 340         * Error interrupt is not enabled for MSI.
 341         */
 342
 343        switch (intr_mode) {
 344        case VNIC_DEV_INTR_MODE_INTX:
 345        case VNIC_DEV_INTR_MODE_MSIX:
 346                error_interrupt_enable = 1;
 347                error_interrupt_offset = fnic->err_intr_offset;
 348                break;
 349        default:
 350                error_interrupt_enable = 0;
 351                error_interrupt_offset = 0;
 352                break;
 353        }
 354
 355        for (i = 0; i < fnic->rq_count; i++) {
 356                cq_index = i;
 357                vnic_rq_init(&fnic->rq[i],
 358                             cq_index,
 359                             error_interrupt_enable,
 360                             error_interrupt_offset);
 361        }
 362
 363        for (i = 0; i < fnic->raw_wq_count; i++) {
 364                cq_index = i + fnic->rq_count;
 365                vnic_wq_init(&fnic->wq[i],
 366                             cq_index,
 367                             error_interrupt_enable,
 368                             error_interrupt_offset);
 369        }
 370
 371        for (i = 0; i < fnic->wq_copy_count; i++) {
 372                vnic_wq_copy_init(&fnic->wq_copy[i],
 373                                  0 /* cq_index 0 - always */,
 374                                  error_interrupt_enable,
 375                                  error_interrupt_offset);
 376        }
 377
 378        for (i = 0; i < fnic->cq_count; i++) {
 379
 380                switch (intr_mode) {
 381                case VNIC_DEV_INTR_MODE_MSIX:
 382                        interrupt_offset = i;
 383                        break;
 384                default:
 385                        interrupt_offset = 0;
 386                        break;
 387                }
 388
 389                vnic_cq_init(&fnic->cq[i],
 390                        0 /* flow_control_enable */,
 391                        1 /* color_enable */,
 392                        0 /* cq_head */,
 393                        0 /* cq_tail */,
 394                        1 /* cq_tail_color */,
 395                        1 /* interrupt_enable */,
 396                        1 /* cq_entry_enable */,
 397                        0 /* cq_message_enable */,
 398                        interrupt_offset,
 399                        0 /* cq_message_addr */);
 400        }
 401
 402        /*
 403         * Init INTR resources
 404         *
 405         * mask_on_assertion is not used for INTx due to the level-
 406         * triggered nature of INTx
 407         */
 408
 409        switch (intr_mode) {
 410        case VNIC_DEV_INTR_MODE_MSI:
 411        case VNIC_DEV_INTR_MODE_MSIX:
 412                mask_on_assertion = 1;
 413                break;
 414        default:
 415                mask_on_assertion = 0;
 416                break;
 417        }
 418
 419        for (i = 0; i < fnic->intr_count; i++) {
 420                vnic_intr_init(&fnic->intr[i],
 421                        fnic->config.intr_timer,
 422                        fnic->config.intr_timer_type,
 423                        mask_on_assertion);
 424        }
 425
 426        /* init the stats memory by making the first call here */
 427        err = vnic_dev_stats_dump(fnic->vdev, &fnic->stats);
 428        if (err) {
 429                shost_printk(KERN_ERR, fnic->lport->host,
 430                             "vnic_dev_stats_dump failed - x%x\n", err);
 431                goto err_out_cleanup;
 432        }
 433
 434        /* Clear LIF stats */
 435        vnic_dev_stats_clear(fnic->vdev);
 436
 437        return 0;
 438
 439err_out_cleanup:
 440        fnic_free_vnic_resources(fnic);
 441
 442        return err;
 443}
 444