drivers/scsi/fnic/fnic_res.c

   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
  34 int 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 %02x:%02x:%02x:%02x:%02x:%02x "
 148                      "wq/wq_copy/rq %d/%d/%d\n",
 149                      fnic->mac_addr[0], fnic->mac_addr[1], fnic->mac_addr[2],
 150                      fnic->mac_addr[3], fnic->mac_addr[4], fnic->mac_addr[5],
 151                      c->wq_enet_desc_count, c->wq_copy_desc_count,
 152                      c->rq_desc_count);
 153         shost_printk(KERN_INFO, fnic->lport->host,
 154                      "vNIC node wwn %llx port wwn %llx\n",
 155                      c->node_wwn, c->port_wwn);
 156         shost_printk(KERN_INFO, fnic->lport->host,
 157                      "vNIC ed_tov %d ra_tov %d\n",
 158                      c->ed_tov, c->ra_tov);
 159         shost_printk(KERN_INFO, fnic->lport->host,
 160                      "vNIC mtu %d intr timer %d\n",
 161                      c->maxdatafieldsize, c->intr_timer);
 162         shost_printk(KERN_INFO, fnic->lport->host,
 163                      "vNIC flags 0x%x luns per tgt %d\n",
 164                      c->flags, c->luns_per_tgt);
 165         shost_printk(KERN_INFO, fnic->lport->host,
 166                      "vNIC flogi_retries %d flogi timeout %d\n",
 167                      c->flogi_retries, c->flogi_timeout);
 168         shost_printk(KERN_INFO, fnic->lport->host,
 169                      "vNIC plogi retries %d plogi timeout %d\n",
 170                      c->plogi_retries, c->plogi_timeout);
 171         shost_printk(KERN_INFO, fnic->lport->host,
 172                      "vNIC io throttle count %d link dn timeout %d\n",
 173                      c->io_throttle_count, c->link_down_timeout);
 174         shost_printk(KERN_INFO, fnic->lport->host,
 175                      "vNIC port dn io retries %d port dn timeout %d\n",
 176                      c->port_down_io_retries, c->port_down_timeout);
 177
 178         return 0;
 179 }
 180
 181 int fnic_set_nic_config(struct fnic *fnic, u8 rss_default_cpu,
 182                         u8 rss_hash_type,
 183                         u8 rss_hash_bits, u8 rss_base_cpu, u8 rss_enable,
 184                         u8 tso_ipid_split_en, u8 ig_vlan_strip_en)
 185 {
 186         u64 a0, a1;
 187         u32 nic_cfg;
 188         int wait = 1000;
 189
 190         vnic_set_nic_cfg(&nic_cfg, rss_default_cpu,
 191                 rss_hash_type, rss_hash_bits, rss_base_cpu,
 192                 rss_enable, tso_ipid_split_en, ig_vlan_strip_en);
 193
 194         a0 = nic_cfg;
 195         a1 = 0;
 196
 197         return vnic_dev_cmd(fnic->vdev, CMD_NIC_CFG, &a0, &a1, wait);
 198 }
 199
 200 void fnic_get_res_counts(struct fnic *fnic)
 201 {
 202         fnic->wq_count = vnic_dev_get_res_count(fnic->vdev, RES_TYPE_WQ);
 203         fnic->raw_wq_count = fnic->wq_count - 1;
 204         fnic->wq_copy_count = fnic->wq_count - fnic->raw_wq_count;
 205         fnic->rq_count = vnic_dev_get_res_count(fnic->vdev, RES_TYPE_RQ);
 206         fnic->cq_count = vnic_dev_get_res_count(fnic->vdev, RES_TYPE_CQ);
 207         fnic->intr_count = vnic_dev_get_res_count(fnic->vdev,
 208                 RES_TYPE_INTR_CTRL);
 209 }
 210
 211 void fnic_free_vnic_resources(struct fnic *fnic)
 212 {
 213         unsigned int i;
 214
 215         for (i = 0; i < fnic->raw_wq_count; i++)
 216                 vnic_wq_free(&fnic->wq[i]);
 217
 218         for (i = 0; i < fnic->wq_copy_count; i++)
 219                 vnic_wq_copy_free(&fnic->wq_copy[i]);
 220
 221         for (i = 0; i < fnic->rq_count; i++)
 222                 vnic_rq_free(&fnic->rq[i]);
 223
 224         for (i = 0; i < fnic->cq_count; i++)
 225                 vnic_cq_free(&fnic->cq[i]);
 226
 227         for (i = 0; i < fnic->intr_count; i++)
 228                 vnic_intr_free(&fnic->intr[i]);
 229 }
 230
 231 int fnic_alloc_vnic_resources(struct fnic *fnic)
 232 {
 233         enum vnic_dev_intr_mode intr_mode;
 234         unsigned int mask_on_assertion;
 235         unsigned int interrupt_offset;
 236         unsigned int error_interrupt_enable;
 237         unsigned int error_interrupt_offset;
 238         unsigned int i, cq_index;
 239         unsigned int wq_copy_cq_desc_count;
 240         int err;
 241
 242         intr_mode = vnic_dev_get_intr_mode(fnic->vdev);
 243
 244         shost_printk(KERN_INFO, fnic->lport->host, "vNIC interrupt mode: %s\n",
 245                      intr_mode == VNIC_DEV_INTR_MODE_INTX ? "legacy PCI INTx" :
 246                      intr_mode == VNIC_DEV_INTR_MODE_MSI ? "MSI" :
 247                      intr_mode == VNIC_DEV_INTR_MODE_MSIX ?
 248                      "MSI-X" : "unknown");
 249
 250         shost_printk(KERN_INFO, fnic->lport->host, "vNIC resources avail: "
 251                      "wq %d cp_wq %d raw_wq %d rq %d cq %d intr %d\n",
 252                      fnic->wq_count, fnic->wq_copy_count, fnic->raw_wq_count,
 253                      fnic->rq_count, fnic->cq_count, fnic->intr_count);
 254
 255         /* Allocate Raw WQ used for FCS frames */
 256         for (i = 0; i < fnic->raw_wq_count; i++) {
 257                 err = vnic_wq_alloc(fnic->vdev, &fnic->wq[i], i,
 258                         fnic->config.wq_enet_desc_count,
 259                         sizeof(struct wq_enet_desc));
 260                 if (err)
 261                         goto err_out_cleanup;
 262         }
 263
 264         /* Allocate Copy WQs used for SCSI IOs */
 265         for (i = 0; i < fnic->wq_copy_count; i++) {
 266                 err = vnic_wq_copy_alloc(fnic->vdev, &fnic->wq_copy[i],
 267                         (fnic->raw_wq_count + i),
 268                         fnic->config.wq_copy_desc_count,
 269                         sizeof(struct fcpio_host_req));
 270                 if (err)
 271                         goto err_out_cleanup;
 272         }
 273
 274         /* RQ for receiving FCS frames */
 275         for (i = 0; i < fnic->rq_count; i++) {
 276                 err = vnic_rq_alloc(fnic->vdev, &fnic->rq[i], i,
 277                         fnic->config.rq_desc_count,
 278                         sizeof(struct rq_enet_desc));
 279                 if (err)
 280                         goto err_out_cleanup;
 281         }
 282
 283         /* CQ for each RQ */
 284         for (i = 0; i < fnic->rq_count; i++) {
 285                 cq_index = i;
 286                 err = vnic_cq_alloc(fnic->vdev,
 287                         &fnic->cq[cq_index], cq_index,
 288                         fnic->config.rq_desc_count,
 289                         sizeof(struct cq_enet_rq_desc));
 290                 if (err)
 291                         goto err_out_cleanup;
 292         }
 293
 294         /* CQ for each WQ */
 295         for (i = 0; i < fnic->raw_wq_count; i++) {
 296                 cq_index = fnic->rq_count + i;
 297                 err = vnic_cq_alloc(fnic->vdev, &fnic->cq[cq_index], cq_index,
 298                         fnic->config.wq_enet_desc_count,
 299                         sizeof(struct cq_enet_wq_desc));
 300                 if (err)
 301                         goto err_out_cleanup;
 302         }
 303
 304         /* CQ for each COPY WQ */
 305         wq_copy_cq_desc_count = (fnic->config.wq_copy_desc_count * 3);
 306         for (i = 0; i < fnic->wq_copy_count; i++) {
 307                 cq_index = fnic->raw_wq_count + fnic->rq_count + i;
 308                 err = vnic_cq_alloc(fnic->vdev, &fnic->cq[cq_index],
 309                         cq_index,
 310                         wq_copy_cq_desc_count,
 311                         sizeof(struct fcpio_fw_req));
 312                 if (err)
 313                         goto err_out_cleanup;
 314         }
 315
 316         for (i = 0; i < fnic->intr_count; i++) {
 317                 err = vnic_intr_alloc(fnic->vdev, &fnic->intr[i], i);
 318                 if (err)
 319                         goto err_out_cleanup;
 320         }
 321
 322         fnic->legacy_pba = vnic_dev_get_res(fnic->vdev,
 323                                 RES_TYPE_INTR_PBA_LEGACY, 0);
 324
 325         if (!fnic->legacy_pba && intr_mode == VNIC_DEV_INTR_MODE_INTX) {
 326                 shost_printk(KERN_ERR, fnic->lport->host,
 327                              "Failed to hook legacy pba resource\n");
 328                 err = -ENODEV;
 329                 goto err_out_cleanup;
 330         }
 331
 332         /*
 333          * Init RQ/WQ resources.
 334          *
 335          * RQ[0 to n-1] point to CQ[0 to n-1]
 336          * WQ[0 to m-1] point to CQ[n to n+m-1]
 337          * WQ_COPY[0 to k-1] points to CQ[n+m to n+m+k-1]
 338          *
 339          * Note for copy wq we always initialize with cq_index = 0
 340          *
 341          * Error interrupt is not enabled for MSI.
 342          */
 343
 344         switch (intr_mode) {
 345         case VNIC_DEV_INTR_MODE_INTX:
 346         case VNIC_DEV_INTR_MODE_MSIX:
 347                 error_interrupt_enable = 1;
 348                 error_interrupt_offset = fnic->err_intr_offset;
 349                 break;
 350         default:
 351                 error_interrupt_enable = 0;
 352                 error_interrupt_offset = 0;
 353                 break;
 354         }
 355
 356         for (i = 0; i < fnic->rq_count; i++) {
 357                 cq_index = i;
 358                 vnic_rq_init(&fnic->rq[i],
 359                              cq_index,
 360                              error_interrupt_enable,
 361                              error_interrupt_offset);
 362         }
 363
 364         for (i = 0; i < fnic->raw_wq_count; i++) {
 365                 cq_index = i + fnic->rq_count;
 366                 vnic_wq_init(&fnic->wq[i],
 367                              cq_index,
 368                              error_interrupt_enable,
 369                              error_interrupt_offset);
 370         }
 371
 372         for (i = 0; i < fnic->wq_copy_count; i++) {
 373                 vnic_wq_copy_init(&fnic->wq_copy[i],
 374                                   0 /* cq_index 0 - always */,
 375                                   error_interrupt_enable,
 376                                   error_interrupt_offset);
 377         }
 378
 379         for (i = 0; i < fnic->cq_count; i++) {
 380
 381                 switch (intr_mode) {
 382                 case VNIC_DEV_INTR_MODE_MSIX:
 383                         interrupt_offset = i;
 384                         break;
 385                 default:
 386                         interrupt_offset = 0;
 387                         break;
 388                 }
 389
 390                 vnic_cq_init(&fnic->cq[i],
 391                         0 /* flow_control_enable */,
 392                         1 /* color_enable */,
 393                         0 /* cq_head */,
 394                         0 /* cq_tail */,
 395                         1 /* cq_tail_color */,
 396                         1 /* interrupt_enable */,
 397                         1 /* cq_entry_enable */,
 398                         0 /* cq_message_enable */,
 399                         interrupt_offset,
 400                         0 /* cq_message_addr */);
 401         }
 402
 403         /*
 404          * Init INTR resources
 405          *
 406          * mask_on_assertion is not used for INTx due to the level-
 407          * triggered nature of INTx
 408          */
 409
 410         switch (intr_mode) {
 411         case VNIC_DEV_INTR_MODE_MSI:
 412         case VNIC_DEV_INTR_MODE_MSIX:
 413                 mask_on_assertion = 1;
 414                 break;
 415         default:
 416                 mask_on_assertion = 0;
 417                 break;
 418         }
 419
 420         for (i = 0; i < fnic->intr_count; i++) {
 421                 vnic_intr_init(&fnic->intr[i],
 422                         fnic->config.intr_timer,
 423                         fnic->config.intr_timer_type,
 424                         mask_on_assertion);
 425         }
 426
 427         /* init the stats memory by making the first call here */
 428         err = vnic_dev_stats_dump(fnic->vdev, &fnic->stats);
 429         if (err) {
 430                 shost_printk(KERN_ERR, fnic->lport->host,
 431                              "vnic_dev_stats_dump failed - x%x\n", err);
 432                 goto err_out_cleanup;
 433         }
 434
 435         /* Clear LIF stats */
 436         vnic_dev_stats_clear(fnic->vdev);
 437
 438         return 0;
 439
 440 err_out_cleanup:
 441         fnic_free_vnic_resources(fnic);
 442
 443         return err;
 444 }