drivers/net/ethernet/sfc/mtd.c

   1 /****************************************************************************
   2  * Driver for Solarflare Solarstorm network controllers and boards
   3  * Copyright 2005-2006 Fen Systems Ltd.
   4  * Copyright 2006-2010 Solarflare Communications Inc.
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License version 2 as published
   8  * by the Free Software Foundation, incorporated herein by reference.
   9  */
  10
  11 #include <linux/bitops.h>
  12 #include <linux/module.h>
  13 #include <linux/mtd/mtd.h>
  14 #include <linux/delay.h>
  15 #include <linux/slab.h>
  16 #include <linux/rtnetlink.h>
  17
  18 #include "net_driver.h"
  19 #include "spi.h"
  20 #include "efx.h"
  21 #include "nic.h"
  22 #include "mcdi.h"
  23 #include "mcdi_pcol.h"
  24
  25 #define EFX_SPI_VERIFY_BUF_LEN 16
  26
  27 struct efx_mtd_partition {
  28         struct mtd_info mtd;
  29         union {
  30                 struct {
  31                         bool updating;
  32                         u8 nvram_type;
  33                         u16 fw_subtype;
  34                 } mcdi;
  35                 size_t offset;
  36         };
  37         const char *type_name;
  38         char name[IFNAMSIZ + 20];
  39 };
  40
  41 struct efx_mtd_ops {
  42         int (*read)(struct mtd_info *mtd, loff_t start, size_t len,
  43                     size_t *retlen, u8 *buffer);
  44         int (*erase)(struct mtd_info *mtd, loff_t start, size_t len);
  45         int (*write)(struct mtd_info *mtd, loff_t start, size_t len,
  46                      size_t *retlen, const u8 *buffer);
  47         int (*sync)(struct mtd_info *mtd);
  48 };
  49
  50 struct efx_mtd {
  51         struct list_head node;
  52         struct efx_nic *efx;
  53         const struct efx_spi_device *spi;
  54         const char *name;
  55         const struct efx_mtd_ops *ops;
  56         size_t n_parts;
  57         struct efx_mtd_partition part[0];
  58 };
  59
  60 #define efx_for_each_partition(part, efx_mtd)                   \
  61         for ((part) = &(efx_mtd)->part[0];                      \
  62              (part) != &(efx_mtd)->part[(efx_mtd)->n_parts];    \
  63              (part)++)
  64
  65 #define to_efx_mtd_partition(mtd)                               \
  66         container_of(mtd, struct efx_mtd_partition, mtd)
  67
  68 static int falcon_mtd_probe(struct efx_nic *efx);
  69 static int siena_mtd_probe(struct efx_nic *efx);
  70
  71 /* SPI utilities */
  72
  73 static int
  74 efx_spi_slow_wait(struct efx_mtd_partition *part, bool uninterruptible)
  75 {
  76         struct efx_mtd *efx_mtd = part->mtd.priv;
  77         const struct efx_spi_device *spi = efx_mtd->spi;
  78         struct efx_nic *efx = efx_mtd->efx;
  79         u8 status;
  80         int rc, i;
  81
  82         /* Wait up to 4s for flash/EEPROM to finish a slow operation. */
  83         for (i = 0; i < 40; i++) {
  84                 __set_current_state(uninterruptible ?
  85                                     TASK_UNINTERRUPTIBLE : TASK_INTERRUPTIBLE);
  86                 schedule_timeout(HZ / 10);
  87                 rc = falcon_spi_cmd(efx, spi, SPI_RDSR, -1, NULL,
  88                                     &status, sizeof(status));
  89                 if (rc)
  90                         return rc;
  91                 if (!(status & SPI_STATUS_NRDY))
  92                         return 0;
  93                 if (signal_pending(current))
  94                         return -EINTR;
  95         }
  96         pr_err("%s: timed out waiting for %s\n", part->name, efx_mtd->name);
  97         return -ETIMEDOUT;
  98 }
  99
 100 static int
 101 efx_spi_unlock(struct efx_nic *efx, const struct efx_spi_device *spi)
 102 {
 103         const u8 unlock_mask = (SPI_STATUS_BP2 | SPI_STATUS_BP1 |
 104                                 SPI_STATUS_BP0);
 105         u8 status;
 106         int rc;
 107
 108         rc = falcon_spi_cmd(efx, spi, SPI_RDSR, -1, NULL,
 109                             &status, sizeof(status));
 110         if (rc)
 111                 return rc;
 112
 113         if (!(status & unlock_mask))
 114                 return 0; /* already unlocked */
 115
 116         rc = falcon_spi_cmd(efx, spi, SPI_WREN, -1, NULL, NULL, 0);
 117         if (rc)
 118                 return rc;
 119         rc = falcon_spi_cmd(efx, spi, SPI_SST_EWSR, -1, NULL, NULL, 0);
 120         if (rc)
 121                 return rc;
 122
 123         status &= ~unlock_mask;
 124         rc = falcon_spi_cmd(efx, spi, SPI_WRSR, -1, &status,
 125                             NULL, sizeof(status));
 126         if (rc)
 127                 return rc;
 128         rc = falcon_spi_wait_write(efx, spi);
 129         if (rc)
 130                 return rc;
 131
 132         return 0;
 133 }
 134
 135 static int
 136 efx_spi_erase(struct efx_mtd_partition *part, loff_t start, size_t len)
 137 {
 138         struct efx_mtd *efx_mtd = part->mtd.priv;
 139         const struct efx_spi_device *spi = efx_mtd->spi;
 140         struct efx_nic *efx = efx_mtd->efx;
 141         unsigned pos, block_len;
 142         u8 empty[EFX_SPI_VERIFY_BUF_LEN];
 143         u8 buffer[EFX_SPI_VERIFY_BUF_LEN];
 144         int rc;
 145
 146         if (len != spi->erase_size)
 147                 return -EINVAL;
 148
 149         if (spi->erase_command == 0)
 150                 return -EOPNOTSUPP;
 151
 152         rc = efx_spi_unlock(efx, spi);
 153         if (rc)
 154                 return rc;
 155         rc = falcon_spi_cmd(efx, spi, SPI_WREN, -1, NULL, NULL, 0);
 156         if (rc)
 157                 return rc;
 158         rc = falcon_spi_cmd(efx, spi, spi->erase_command, start, NULL,
 159                             NULL, 0);
 160         if (rc)
 161                 return rc;
 162         rc = efx_spi_slow_wait(part, false);
 163
 164         /* Verify the entire region has been wiped */
 165         memset(empty, 0xff, sizeof(empty));
 166         for (pos = 0; pos < len; pos += block_len) {
 167                 block_len = min(len - pos, sizeof(buffer));
 168                 rc = falcon_spi_read(efx, spi, start + pos, block_len,
 169                                      NULL, buffer);
 170                 if (rc)
 171                         return rc;
 172                 if (memcmp(empty, buffer, block_len))
 173                         return -EIO;
 174
 175                 /* Avoid locking up the system */
 176                 cond_resched();
 177                 if (signal_pending(current))
 178                         return -EINTR;
 179         }
 180
 181         return rc;
 182 }
 183
 184 /* MTD interface */
 185
 186 static int efx_mtd_erase(struct mtd_info *mtd, struct erase_info *erase)
 187 {
 188         struct efx_mtd *efx_mtd = mtd->priv;
 189         int rc;
 190
 191         rc = efx_mtd->ops->erase(mtd, erase->addr, erase->len);
 192         if (rc == 0) {
 193                 erase->state = MTD_ERASE_DONE;
 194         } else {
 195                 erase->state = MTD_ERASE_FAILED;
 196                 erase->fail_addr = 0xffffffff;
 197         }
 198         mtd_erase_callback(erase);
 199         return rc;
 200 }
 201
 202 static void efx_mtd_sync(struct mtd_info *mtd)
 203 {
 204         struct efx_mtd_partition *part = to_efx_mtd_partition(mtd);
 205         struct efx_mtd *efx_mtd = mtd->priv;
 206         int rc;
 207
 208         rc = efx_mtd->ops->sync(mtd);
 209         if (rc)
 210                 pr_err("%s: %s sync failed (%d)\n",
 211                        part->name, efx_mtd->name, rc);
 212 }
 213
 214 static void efx_mtd_remove_partition(struct efx_mtd_partition *part)
 215 {
 216         int rc;
 217
 218         for (;;) {
 219                 rc = mtd_device_unregister(&part->mtd);
 220                 if (rc != -EBUSY)
 221                         break;
 222                 ssleep(1);
 223         }
 224         WARN_ON(rc);
 225 }
 226
 227 static void efx_mtd_remove_device(struct efx_mtd *efx_mtd)
 228 {
 229         struct efx_mtd_partition *part;
 230
 231         efx_for_each_partition(part, efx_mtd)
 232                 efx_mtd_remove_partition(part);
 233         list_del(&efx_mtd->node);
 234         kfree(efx_mtd);
 235 }
 236
 237 static void efx_mtd_rename_device(struct efx_mtd *efx_mtd)
 238 {
 239         struct efx_mtd_partition *part;
 240
 241         efx_for_each_partition(part, efx_mtd)
 242                 if (efx_nic_rev(efx_mtd->efx) >= EFX_REV_SIENA_A0)
 243                         snprintf(part->name, sizeof(part->name),
 244                                  "%s %s:%02x", efx_mtd->efx->name,
 245                                  part->type_name, part->mcdi.fw_subtype);
 246                 else
 247                         snprintf(part->name, sizeof(part->name),
 248                                  "%s %s", efx_mtd->efx->name,
 249                                  part->type_name);
 250 }
 251
 252 static int efx_mtd_probe_device(struct efx_nic *efx, struct efx_mtd *efx_mtd)
 253 {
 254         struct efx_mtd_partition *part;
 255
 256         efx_mtd->efx = efx;
 257
 258         efx_mtd_rename_device(efx_mtd);
 259
 260         efx_for_each_partition(part, efx_mtd) {
 261                 part->mtd.writesize = 1;
 262
 263                 part->mtd.owner = THIS_MODULE;
 264                 part->mtd.priv = efx_mtd;
 265                 part->mtd.name = part->name;
 266                 part->mtd.erase = efx_mtd_erase;
 267                 part->mtd.read = efx_mtd->ops->read;
 268                 part->mtd.write = efx_mtd->ops->write;
 269                 part->mtd.sync = efx_mtd_sync;
 270
 271                 if (mtd_device_register(&part->mtd, NULL, 0))
 272                         goto fail;
 273         }
 274
 275         list_add(&efx_mtd->node, &efx->mtd_list);
 276         return 0;
 277
 278 fail:
 279         while (part != &efx_mtd->part[0]) {
 280                 --part;
 281                 efx_mtd_remove_partition(part);
 282         }
 283         /* mtd_device_register() returns 1 if the MTD table is full */
 284         return -ENOMEM;
 285 }
 286
 287 void efx_mtd_remove(struct efx_nic *efx)
 288 {
 289         struct efx_mtd *efx_mtd, *next;
 290
 291         WARN_ON(efx_dev_registered(efx));
 292
 293         list_for_each_entry_safe(efx_mtd, next, &efx->mtd_list, node)
 294                 efx_mtd_remove_device(efx_mtd);
 295 }
 296
 297 void efx_mtd_rename(struct efx_nic *efx)
 298 {
 299         struct efx_mtd *efx_mtd;
 300
 301         ASSERT_RTNL();
 302
 303         list_for_each_entry(efx_mtd, &efx->mtd_list, node)
 304                 efx_mtd_rename_device(efx_mtd);
 305 }
 306
 307 int efx_mtd_probe(struct efx_nic *efx)
 308 {
 309         if (efx_nic_rev(efx) >= EFX_REV_SIENA_A0)
 310                 return siena_mtd_probe(efx);
 311         else
 312                 return falcon_mtd_probe(efx);
 313 }
 314
 315 /* Implementation of MTD operations for Falcon */
 316
 317 static int falcon_mtd_read(struct mtd_info *mtd, loff_t start,
 318                            size_t len, size_t *retlen, u8 *buffer)
 319 {
 320         struct efx_mtd_partition *part = to_efx_mtd_partition(mtd);
 321         struct efx_mtd *efx_mtd = mtd->priv;
 322         const struct efx_spi_device *spi = efx_mtd->spi;
 323         struct efx_nic *efx = efx_mtd->efx;
 324         struct falcon_nic_data *nic_data = efx->nic_data;
 325         int rc;
 326
 327         rc = mutex_lock_interruptible(&nic_data->spi_lock);
 328         if (rc)
 329                 return rc;
 330         rc = falcon_spi_read(efx, spi, part->offset + start, len,
 331                              retlen, buffer);
 332         mutex_unlock(&nic_data->spi_lock);
 333         return rc;
 334 }
 335
 336 static int falcon_mtd_erase(struct mtd_info *mtd, loff_t start, size_t len)
 337 {
 338         struct efx_mtd_partition *part = to_efx_mtd_partition(mtd);
 339         struct efx_mtd *efx_mtd = mtd->priv;
 340         struct efx_nic *efx = efx_mtd->efx;
 341         struct falcon_nic_data *nic_data = efx->nic_data;
 342         int rc;
 343
 344         rc = mutex_lock_interruptible(&nic_data->spi_lock);
 345         if (rc)
 346                 return rc;
 347         rc = efx_spi_erase(part, part->offset + start, len);
 348         mutex_unlock(&nic_data->spi_lock);
 349         return rc;
 350 }
 351
 352 static int falcon_mtd_write(struct mtd_info *mtd, loff_t start,
 353                             size_t len, size_t *retlen, const u8 *buffer)
 354 {
 355         struct efx_mtd_partition *part = to_efx_mtd_partition(mtd);
 356         struct efx_mtd *efx_mtd = mtd->priv;
 357         const struct efx_spi_device *spi = efx_mtd->spi;
 358         struct efx_nic *efx = efx_mtd->efx;
 359         struct falcon_nic_data *nic_data = efx->nic_data;
 360         int rc;
 361
 362         rc = mutex_lock_interruptible(&nic_data->spi_lock);
 363         if (rc)
 364                 return rc;
 365         rc = falcon_spi_write(efx, spi, part->offset + start, len,
 366                               retlen, buffer);
 367         mutex_unlock(&nic_data->spi_lock);
 368         return rc;
 369 }
 370
 371 static int falcon_mtd_sync(struct mtd_info *mtd)
 372 {
 373         struct efx_mtd_partition *part = to_efx_mtd_partition(mtd);
 374         struct efx_mtd *efx_mtd = mtd->priv;
 375         struct efx_nic *efx = efx_mtd->efx;
 376         struct falcon_nic_data *nic_data = efx->nic_data;
 377         int rc;
 378
 379         mutex_lock(&nic_data->spi_lock);
 380         rc = efx_spi_slow_wait(part, true);
 381         mutex_unlock(&nic_data->spi_lock);
 382         return rc;
 383 }
 384
 385 static struct efx_mtd_ops falcon_mtd_ops = {
 386         .read   = falcon_mtd_read,
 387         .erase  = falcon_mtd_erase,
 388         .write  = falcon_mtd_write,
 389         .sync   = falcon_mtd_sync,
 390 };
 391
 392 static int falcon_mtd_probe(struct efx_nic *efx)
 393 {
 394         struct falcon_nic_data *nic_data = efx->nic_data;
 395         struct efx_spi_device *spi;
 396         struct efx_mtd *efx_mtd;
 397         int rc = -ENODEV;
 398
 399         ASSERT_RTNL();
 400
 401         spi = &nic_data->spi_flash;
 402         if (efx_spi_present(spi) && spi->size > FALCON_FLASH_BOOTCODE_START) {
 403                 efx_mtd = kzalloc(sizeof(*efx_mtd) + sizeof(efx_mtd->part[0]),
 404                                   GFP_KERNEL);
 405                 if (!efx_mtd)
 406                         return -ENOMEM;
 407
 408                 efx_mtd->spi = spi;
 409                 efx_mtd->name = "flash";
 410                 efx_mtd->ops = &falcon_mtd_ops;
 411
 412                 efx_mtd->n_parts = 1;
 413                 efx_mtd->part[0].mtd.type = MTD_NORFLASH;
 414                 efx_mtd->part[0].mtd.flags = MTD_CAP_NORFLASH;
 415                 efx_mtd->part[0].mtd.size = spi->size - FALCON_FLASH_BOOTCODE_START;
 416                 efx_mtd->part[0].mtd.erasesize = spi->erase_size;
 417                 efx_mtd->part[0].offset = FALCON_FLASH_BOOTCODE_START;
 418                 efx_mtd->part[0].type_name = "sfc_flash_bootrom";
 419
 420                 rc = efx_mtd_probe_device(efx, efx_mtd);
 421                 if (rc) {
 422                         kfree(efx_mtd);
 423                         return rc;
 424                 }
 425         }
 426
 427         spi = &nic_data->spi_eeprom;
 428         if (efx_spi_present(spi) && spi->size > EFX_EEPROM_BOOTCONFIG_START) {
 429                 efx_mtd = kzalloc(sizeof(*efx_mtd) + sizeof(efx_mtd->part[0]),
 430                                   GFP_KERNEL);
 431                 if (!efx_mtd)
 432                         return -ENOMEM;
 433
 434                 efx_mtd->spi = spi;
 435                 efx_mtd->name = "EEPROM";
 436                 efx_mtd->ops = &falcon_mtd_ops;
 437
 438                 efx_mtd->n_parts = 1;
 439                 efx_mtd->part[0].mtd.type = MTD_RAM;
 440                 efx_mtd->part[0].mtd.flags = MTD_CAP_RAM;
 441                 efx_mtd->part[0].mtd.size =
 442                         min(spi->size, EFX_EEPROM_BOOTCONFIG_END) -
 443                         EFX_EEPROM_BOOTCONFIG_START;
 444                 efx_mtd->part[0].mtd.erasesize = spi->erase_size;
 445                 efx_mtd->part[0].offset = EFX_EEPROM_BOOTCONFIG_START;
 446                 efx_mtd->part[0].type_name = "sfc_bootconfig";
 447
 448                 rc = efx_mtd_probe_device(efx, efx_mtd);
 449                 if (rc) {
 450                         kfree(efx_mtd);
 451                         return rc;
 452                 }
 453         }
 454
 455         return rc;
 456 }
 457
 458 /* Implementation of MTD operations for Siena */
 459
 460 static int siena_mtd_read(struct mtd_info *mtd, loff_t start,
 461                           size_t len, size_t *retlen, u8 *buffer)
 462 {
 463         struct efx_mtd_partition *part = to_efx_mtd_partition(mtd);
 464         struct efx_mtd *efx_mtd = mtd->priv;
 465         struct efx_nic *efx = efx_mtd->efx;
 466         loff_t offset = start;
 467         loff_t end = min_t(loff_t, start + len, mtd->size);
 468         size_t chunk;
 469         int rc = 0;
 470
 471         while (offset < end) {
 472                 chunk = min_t(size_t, end - offset, EFX_MCDI_NVRAM_LEN_MAX);
 473                 rc = efx_mcdi_nvram_read(efx, part->mcdi.nvram_type, offset,
 474                                          buffer, chunk);
 475                 if (rc)
 476                         goto out;
 477                 offset += chunk;
 478                 buffer += chunk;
 479         }
 480 out:
 481         *retlen = offset - start;
 482         return rc;
 483 }
 484
 485 static int siena_mtd_erase(struct mtd_info *mtd, loff_t start, size_t len)
 486 {
 487         struct efx_mtd_partition *part = to_efx_mtd_partition(mtd);
 488         struct efx_mtd *efx_mtd = mtd->priv;
 489         struct efx_nic *efx = efx_mtd->efx;
 490         loff_t offset = start & ~((loff_t)(mtd->erasesize - 1));
 491         loff_t end = min_t(loff_t, start + len, mtd->size);
 492         size_t chunk = part->mtd.erasesize;
 493         int rc = 0;
 494
 495         if (!part->mcdi.updating) {
 496                 rc = efx_mcdi_nvram_update_start(efx, part->mcdi.nvram_type);
 497                 if (rc)
 498                         goto out;
 499                 part->mcdi.updating = 1;
 500         }
 501
 502         /* The MCDI interface can in fact do multiple erase blocks at once;
 503          * but erasing may be slow, so we make multiple calls here to avoid
 504          * tripping the MCDI RPC timeout. */
 505         while (offset < end) {
 506                 rc = efx_mcdi_nvram_erase(efx, part->mcdi.nvram_type, offset,
 507                                           chunk);
 508                 if (rc)
 509                         goto out;
 510                 offset += chunk;
 511         }
 512 out:
 513         return rc;
 514 }
 515
 516 static int siena_mtd_write(struct mtd_info *mtd, loff_t start,
 517                            size_t len, size_t *retlen, const u8 *buffer)
 518 {
 519         struct efx_mtd_partition *part = to_efx_mtd_partition(mtd);
 520         struct efx_mtd *efx_mtd = mtd->priv;
 521         struct efx_nic *efx = efx_mtd->efx;
 522         loff_t offset = start;
 523         loff_t end = min_t(loff_t, start + len, mtd->size);
 524         size_t chunk;
 525         int rc = 0;
 526
 527         if (!part->mcdi.updating) {
 528                 rc = efx_mcdi_nvram_update_start(efx, part->mcdi.nvram_type);
 529                 if (rc)
 530                         goto out;
 531                 part->mcdi.updating = 1;
 532         }
 533
 534         while (offset < end) {
 535                 chunk = min_t(size_t, end - offset, EFX_MCDI_NVRAM_LEN_MAX);
 536                 rc = efx_mcdi_nvram_write(efx, part->mcdi.nvram_type, offset,
 537                                           buffer, chunk);
 538                 if (rc)
 539                         goto out;
 540                 offset += chunk;
 541                 buffer += chunk;
 542         }
 543 out:
 544         *retlen = offset - start;
 545         return rc;
 546 }
 547
 548 static int siena_mtd_sync(struct mtd_info *mtd)
 549 {
 550         struct efx_mtd_partition *part = to_efx_mtd_partition(mtd);
 551         struct efx_mtd *efx_mtd = mtd->priv;
 552         struct efx_nic *efx = efx_mtd->efx;
 553         int rc = 0;
 554
 555         if (part->mcdi.updating) {
 556                 part->mcdi.updating = 0;
 557                 rc = efx_mcdi_nvram_update_finish(efx, part->mcdi.nvram_type);
 558         }
 559
 560         return rc;
 561 }
 562
 563 static struct efx_mtd_ops siena_mtd_ops = {
 564         .read   = siena_mtd_read,
 565         .erase  = siena_mtd_erase,
 566         .write  = siena_mtd_write,
 567         .sync   = siena_mtd_sync,
 568 };
 569
 570 struct siena_nvram_type_info {
 571         int port;
 572         const char *name;
 573 };
 574
 575 static struct siena_nvram_type_info siena_nvram_types[] = {
 576         [MC_CMD_NVRAM_TYPE_DISABLED_CALLISTO]   = { 0, "sfc_dummy_phy" },
 577         [MC_CMD_NVRAM_TYPE_MC_FW]               = { 0, "sfc_mcfw" },
 578         [MC_CMD_NVRAM_TYPE_MC_FW_BACKUP]        = { 0, "sfc_mcfw_backup" },
 579         [MC_CMD_NVRAM_TYPE_STATIC_CFG_PORT0]    = { 0, "sfc_static_cfg" },
 580         [MC_CMD_NVRAM_TYPE_STATIC_CFG_PORT1]    = { 1, "sfc_static_cfg" },
 581         [MC_CMD_NVRAM_TYPE_DYNAMIC_CFG_PORT0]   = { 0, "sfc_dynamic_cfg" },
 582         [MC_CMD_NVRAM_TYPE_DYNAMIC_CFG_PORT1]   = { 1, "sfc_dynamic_cfg" },
 583         [MC_CMD_NVRAM_TYPE_EXP_ROM]             = { 0, "sfc_exp_rom" },
 584         [MC_CMD_NVRAM_TYPE_EXP_ROM_CFG_PORT0]   = { 0, "sfc_exp_rom_cfg" },
 585         [MC_CMD_NVRAM_TYPE_EXP_ROM_CFG_PORT1]   = { 1, "sfc_exp_rom_cfg" },
 586         [MC_CMD_NVRAM_TYPE_PHY_PORT0]           = { 0, "sfc_phy_fw" },
 587         [MC_CMD_NVRAM_TYPE_PHY_PORT1]           = { 1, "sfc_phy_fw" },
 588 };
 589
 590 static int siena_mtd_probe_partition(struct efx_nic *efx,
 591                                      struct efx_mtd *efx_mtd,
 592                                      unsigned int part_id,
 593                                      unsigned int type)
 594 {
 595         struct efx_mtd_partition *part = &efx_mtd->part[part_id];
 596         struct siena_nvram_type_info *info;
 597         size_t size, erase_size;
 598         bool protected;
 599         int rc;
 600
 601         if (type >= ARRAY_SIZE(siena_nvram_types))
 602                 return -ENODEV;
 603
 604         info = &siena_nvram_types[type];
 605
 606         if (info->port != efx_port_num(efx))
 607                 return -ENODEV;
 608
 609         rc = efx_mcdi_nvram_info(efx, type, &size, &erase_size, &protected);
 610         if (rc)
 611                 return rc;
 612         if (protected)
 613                 return -ENODEV; /* hide it */
 614
 615         part->mcdi.nvram_type = type;
 616         part->type_name = info->name;
 617
 618         part->mtd.type = MTD_NORFLASH;
 619         part->mtd.flags = MTD_CAP_NORFLASH;
 620         part->mtd.size = size;
 621         part->mtd.erasesize = erase_size;
 622
 623         return 0;
 624 }
 625
 626 static int siena_mtd_get_fw_subtypes(struct efx_nic *efx,
 627                                      struct efx_mtd *efx_mtd)
 628 {
 629         struct efx_mtd_partition *part;
 630         uint16_t fw_subtype_list[MC_CMD_GET_BOARD_CFG_OUT_FW_SUBTYPE_LIST_LEN /
 631                                  sizeof(uint16_t)];
 632         int rc;
 633
 634         rc = efx_mcdi_get_board_cfg(efx, NULL, fw_subtype_list);
 635         if (rc)
 636                 return rc;
 637
 638         efx_for_each_partition(part, efx_mtd)
 639                 part->mcdi.fw_subtype = fw_subtype_list[part->mcdi.nvram_type];
 640
 641         return 0;
 642 }
 643
 644 static int siena_mtd_probe(struct efx_nic *efx)
 645 {
 646         struct efx_mtd *efx_mtd;
 647         int rc = -ENODEV;
 648         u32 nvram_types;
 649         unsigned int type;
 650
 651         ASSERT_RTNL();
 652
 653         rc = efx_mcdi_nvram_types(efx, &nvram_types);
 654         if (rc)
 655                 return rc;
 656
 657         efx_mtd = kzalloc(sizeof(*efx_mtd) +
 658                           hweight32(nvram_types) * sizeof(efx_mtd->part[0]),
 659                           GFP_KERNEL);
 660         if (!efx_mtd)
 661                 return -ENOMEM;
 662
 663         efx_mtd->name = "Siena NVRAM manager";
 664
 665         efx_mtd->ops = &siena_mtd_ops;
 666
 667         type = 0;
 668         efx_mtd->n_parts = 0;
 669
 670         while (nvram_types != 0) {
 671                 if (nvram_types & 1) {
 672                         rc = siena_mtd_probe_partition(efx, efx_mtd,
 673                                                        efx_mtd->n_parts, type);
 674                         if (rc == 0)
 675                                 efx_mtd->n_parts++;
 676                         else if (rc != -ENODEV)
 677                                 goto fail;
 678                 }
 679                 type++;
 680                 nvram_types >>= 1;
 681         }
 682
 683         rc = siena_mtd_get_fw_subtypes(efx, efx_mtd);
 684         if (rc)
 685                 goto fail;
 686
 687         rc = efx_mtd_probe_device(efx, efx_mtd);
 688 fail:
 689         if (rc)
 690                 kfree(efx_mtd);
 691         return rc;
 692 }
 693