drivers/scsi/sd_zbc.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * SCSI Zoned Block commands
   4  *
   5  * Copyright (C) 2014-2015 SUSE Linux GmbH
   6  * Written by: Hannes Reinecke <hare@suse.de>
   7  * Modified by: Damien Le Moal <damien.lemoal@hgst.com>
   8  * Modified by: Shaun Tancheff <shaun.tancheff@seagate.com>
   9  */
  10
  11 #include <linux/blkdev.h>
  12 #include <linux/vmalloc.h>
  13 #include <linux/sched/mm.h>
  14 #include <linux/mutex.h>
  15
  16 #include <linux/unaligned.h>
  17
  18 #include <scsi/scsi.h>
  19 #include <scsi/scsi_cmnd.h>
  20
  21 #include "sd.h"
  22
  23 #define CREATE_TRACE_POINTS
  24 #include "sd_trace.h"
  25
  26 /* Whether or not a SCSI zone descriptor describes a gap zone. */
  27 static bool sd_zbc_is_gap_zone(const u8 buf[64])
  28 {
  29         return (buf[0] & 0xf) == ZBC_ZONE_TYPE_GAP;
  30 }
  31
  32 /**
  33  * sd_zbc_parse_report - Parse a SCSI zone descriptor
  34  * @sdkp: SCSI disk pointer.
  35  * @buf: SCSI zone descriptor.
  36  * @idx: Index of the zone relative to the first zone reported by the current
  37  *      sd_zbc_report_zones() call.
  38  * @cb: Callback function pointer.
  39  * @data: Second argument passed to @cb.
  40  *
  41  * Return: Value returned by @cb.
  42  *
  43  * Convert a SCSI zone descriptor into struct blk_zone format. Additionally,
  44  * call @cb(blk_zone, @data).
  45  */
  46 static int sd_zbc_parse_report(struct scsi_disk *sdkp, const u8 buf[64],
  47                                unsigned int idx, report_zones_cb cb, void *data)
  48 {
  49         struct scsi_device *sdp = sdkp->device;
  50         struct blk_zone zone = { 0 };
  51         sector_t start_lba, gran;
  52         int ret;
  53
  54         if (WARN_ON_ONCE(sd_zbc_is_gap_zone(buf)))
  55                 return -EINVAL;
  56
  57         zone.type = buf[0] & 0x0f;
  58         zone.cond = (buf[1] >> 4) & 0xf;
  59         if (buf[1] & 0x01)
  60                 zone.reset = 1;
  61         if (buf[1] & 0x02)
  62                 zone.non_seq = 1;
  63
  64         start_lba = get_unaligned_be64(&buf[16]);
  65         zone.start = logical_to_sectors(sdp, start_lba);
  66         zone.capacity = logical_to_sectors(sdp, get_unaligned_be64(&buf[8]));
  67         zone.len = zone.capacity;
  68         if (sdkp->zone_starting_lba_gran) {
  69                 gran = logical_to_sectors(sdp, sdkp->zone_starting_lba_gran);
  70                 if (zone.len > gran) {
  71                         sd_printk(KERN_ERR, sdkp,
  72                                   "Invalid zone at LBA %llu with capacity %llu and length %llu; granularity = %llu\n",
  73                                   start_lba,
  74                                   sectors_to_logical(sdp, zone.capacity),
  75                                   sectors_to_logical(sdp, zone.len),
  76                                   sectors_to_logical(sdp, gran));
  77                         return -EINVAL;
  78                 }
  79                 /*
  80                  * Use the starting LBA granularity instead of the zone length
  81                  * obtained from the REPORT ZONES command.
  82                  */
  83                 zone.len = gran;
  84         }
  85         if (zone.cond == ZBC_ZONE_COND_FULL)
  86                 zone.wp = zone.start + zone.len;
  87         else
  88                 zone.wp = logical_to_sectors(sdp, get_unaligned_be64(&buf[24]));
  89
  90         ret = cb(&zone, idx, data);
  91         if (ret)
  92                 return ret;
  93
  94         return 0;
  95 }
  96
  97 /**
  98  * sd_zbc_do_report_zones - Issue a REPORT ZONES scsi command.
  99  * @sdkp: The target disk
 100  * @buf: vmalloc-ed buffer to use for the reply
 101  * @buflen: the buffer size
 102  * @lba: Start LBA of the report
 103  * @partial: Do partial report
 104  *
 105  * For internal use during device validation.
 106  * Using partial=true can significantly speed up execution of a report zones
 107  * command because the disk does not have to count all possible report matching
 108  * zones and will only report the count of zones fitting in the command reply
 109  * buffer.
 110  */
 111 static int sd_zbc_do_report_zones(struct scsi_disk *sdkp, unsigned char *buf,
 112                                   unsigned int buflen, sector_t lba,
 113                                   bool partial)
 114 {
 115         struct scsi_device *sdp = sdkp->device;
 116         const int timeout = sdp->request_queue->rq_timeout;
 117         struct scsi_sense_hdr sshdr;
 118         const struct scsi_exec_args exec_args = {
 119                 .sshdr = &sshdr,
 120         };
 121         unsigned char cmd[16];
 122         unsigned int rep_len;
 123         int result;
 124
 125         memset(cmd, 0, 16);
 126         cmd[0] = ZBC_IN;
 127         cmd[1] = ZI_REPORT_ZONES;
 128         put_unaligned_be64(lba, &cmd[2]);
 129         put_unaligned_be32(buflen, &cmd[10]);
 130         if (partial)
 131                 cmd[14] = ZBC_REPORT_ZONE_PARTIAL;
 132
 133         result = scsi_execute_cmd(sdp, cmd, REQ_OP_DRV_IN, buf, buflen,
 134                                   timeout, SD_MAX_RETRIES, &exec_args);
 135         if (result) {
 136                 sd_printk(KERN_ERR, sdkp,
 137                           "REPORT ZONES start lba %llu failed\n", lba);
 138                 sd_print_result(sdkp, "REPORT ZONES", result);
 139                 if (result > 0 && scsi_sense_valid(&sshdr))
 140                         sd_print_sense_hdr(sdkp, &sshdr);
 141                 return -EIO;
 142         }
 143
 144         rep_len = get_unaligned_be32(&buf[0]);
 145         if (rep_len < 64) {
 146                 sd_printk(KERN_ERR, sdkp,
 147                           "REPORT ZONES report invalid length %u\n",
 148                           rep_len);
 149                 return -EIO;
 150         }
 151
 152         return 0;
 153 }
 154
 155 /**
 156  * sd_zbc_alloc_report_buffer() - Allocate a buffer for report zones reply.
 157  * @sdkp: The target disk
 158  * @nr_zones: Maximum number of zones to report
 159  * @buflen: Size of the buffer allocated
 160  *
 161  * Try to allocate a reply buffer for the number of requested zones.
 162  * The size of the buffer allocated may be smaller than requested to
 163  * satify the device constraint (max_hw_sectors, max_segments, etc).
 164  *
 165  * Return the address of the allocated buffer and update @buflen with
 166  * the size of the allocated buffer.
 167  */
 168 static void *sd_zbc_alloc_report_buffer(struct scsi_disk *sdkp,
 169                                         unsigned int nr_zones, size_t *buflen)
 170 {
 171         struct request_queue *q = sdkp->disk->queue;
 172         size_t bufsize;
 173         void *buf;
 174
 175         /*
 176          * Report zone buffer size should be at most 64B times the number of
 177          * zones requested plus the 64B reply header, but should be aligned
 178          * to SECTOR_SIZE for ATA devices.
 179          * Make sure that this size does not exceed the hardware capabilities.
 180          * Furthermore, since the report zone command cannot be split, make
 181          * sure that the allocated buffer can always be mapped by limiting the
 182          * number of pages allocated to the HBA max segments limit.
 183          */
 184         nr_zones = min(nr_zones, sdkp->zone_info.nr_zones);
 185         bufsize = roundup((nr_zones + 1) * 64, SECTOR_SIZE);
 186         bufsize = min_t(size_t, bufsize,
 187                         queue_max_hw_sectors(q) << SECTOR_SHIFT);
 188         bufsize = min_t(size_t, bufsize, queue_max_segments(q) << PAGE_SHIFT);
 189
 190         while (bufsize >= SECTOR_SIZE) {
 191                 buf = kvzalloc(bufsize, GFP_KERNEL | __GFP_NORETRY);
 192                 if (buf) {
 193                         *buflen = bufsize;
 194                         return buf;
 195                 }
 196                 bufsize = rounddown(bufsize >> 1, SECTOR_SIZE);
 197         }
 198
 199         return NULL;
 200 }
 201
 202 /**
 203  * sd_zbc_zone_sectors - Get the device zone size in number of 512B sectors.
 204  * @sdkp: The target disk
 205  */
 206 static inline sector_t sd_zbc_zone_sectors(struct scsi_disk *sdkp)
 207 {
 208         return logical_to_sectors(sdkp->device, sdkp->zone_info.zone_blocks);
 209 }
 210
 211 /**
 212  * sd_zbc_report_zones - SCSI .report_zones() callback.
 213  * @disk: Disk to report zones for.
 214  * @sector: Start sector.
 215  * @nr_zones: Maximum number of zones to report.
 216  * @cb: Callback function called to report zone information.
 217  * @data: Second argument passed to @cb.
 218  *
 219  * Called by the block layer to iterate over zone information. See also the
 220  * disk->fops->report_zones() calls in block/blk-zoned.c.
 221  */
 222 int sd_zbc_report_zones(struct gendisk *disk, sector_t sector,
 223                         unsigned int nr_zones, report_zones_cb cb, void *data)
 224 {
 225         struct scsi_disk *sdkp = scsi_disk(disk);
 226         sector_t lba = sectors_to_logical(sdkp->device, sector);
 227         unsigned int nr, i;
 228         unsigned char *buf;
 229         u64 zone_length, start_lba;
 230         size_t offset, buflen = 0;
 231         int zone_idx = 0;
 232         int ret;
 233
 234         if (sdkp->device->type != TYPE_ZBC)
 235                 /* Not a zoned device */
 236                 return -EOPNOTSUPP;
 237
 238         if (!sdkp->capacity)
 239                 /* Device gone or invalid */
 240                 return -ENODEV;
 241
 242         buf = sd_zbc_alloc_report_buffer(sdkp, nr_zones, &buflen);
 243         if (!buf)
 244                 return -ENOMEM;
 245
 246         while (zone_idx < nr_zones && lba < sdkp->capacity) {
 247                 ret = sd_zbc_do_report_zones(sdkp, buf, buflen, lba, true);
 248                 if (ret)
 249                         goto out;
 250
 251                 offset = 0;
 252                 nr = min(nr_zones, get_unaligned_be32(&buf[0]) / 64);
 253                 if (!nr)
 254                         break;
 255
 256                 for (i = 0; i < nr && zone_idx < nr_zones; i++) {
 257                         offset += 64;
 258                         start_lba = get_unaligned_be64(&buf[offset + 16]);
 259                         zone_length = get_unaligned_be64(&buf[offset + 8]);
 260                         if ((zone_idx == 0 &&
 261                             (lba < start_lba ||
 262                              lba >= start_lba + zone_length)) ||
 263                             (zone_idx > 0 && start_lba != lba) ||
 264                             start_lba + zone_length < start_lba) {
 265                                 sd_printk(KERN_ERR, sdkp,
 266                                           "Zone %d at LBA %llu is invalid: %llu + %llu\n",
 267                                           zone_idx, lba, start_lba, zone_length);
 268                                 ret = -EINVAL;
 269                                 goto out;
 270                         }
 271                         lba = start_lba + zone_length;
 272                         if (sd_zbc_is_gap_zone(&buf[offset])) {
 273                                 if (sdkp->zone_starting_lba_gran)
 274                                         continue;
 275                                 sd_printk(KERN_ERR, sdkp,
 276                                           "Gap zone without constant LBA offsets\n");
 277                                 ret = -EINVAL;
 278                                 goto out;
 279                         }
 280
 281                         ret = sd_zbc_parse_report(sdkp, buf + offset, zone_idx,
 282                                                   cb, data);
 283                         if (ret)
 284                                 goto out;
 285
 286                         zone_idx++;
 287                 }
 288         }
 289
 290         ret = zone_idx;
 291 out:
 292         kvfree(buf);
 293         return ret;
 294 }
 295
 296 static blk_status_t sd_zbc_cmnd_checks(struct scsi_cmnd *cmd)
 297 {
 298         struct request *rq = scsi_cmd_to_rq(cmd);
 299         struct scsi_disk *sdkp = scsi_disk(rq->q->disk);
 300         sector_t sector = blk_rq_pos(rq);
 301
 302         if (sdkp->device->type != TYPE_ZBC)
 303                 /* Not a zoned device */
 304                 return BLK_STS_IOERR;
 305
 306         if (sdkp->device->changed)
 307                 return BLK_STS_IOERR;
 308
 309         if (sector & (sd_zbc_zone_sectors(sdkp) - 1))
 310                 /* Unaligned request */
 311                 return BLK_STS_IOERR;
 312
 313         return BLK_STS_OK;
 314 }
 315
 316 /**
 317  * sd_zbc_setup_zone_mgmt_cmnd - Prepare a zone ZBC_OUT command. The operations
 318  *                      can be RESET WRITE POINTER, OPEN, CLOSE or FINISH.
 319  * @cmd: the command to setup
 320  * @op: Operation to be performed
 321  * @all: All zones control
 322  *
 323  * Called from sd_init_command() for REQ_OP_ZONE_RESET, REQ_OP_ZONE_RESET_ALL,
 324  * REQ_OP_ZONE_OPEN, REQ_OP_ZONE_CLOSE or REQ_OP_ZONE_FINISH requests.
 325  */
 326 blk_status_t sd_zbc_setup_zone_mgmt_cmnd(struct scsi_cmnd *cmd,
 327                                          unsigned char op, bool all)
 328 {
 329         struct request *rq = scsi_cmd_to_rq(cmd);
 330         sector_t sector = blk_rq_pos(rq);
 331         struct scsi_disk *sdkp = scsi_disk(rq->q->disk);
 332         sector_t block = sectors_to_logical(sdkp->device, sector);
 333         blk_status_t ret;
 334
 335         ret = sd_zbc_cmnd_checks(cmd);
 336         if (ret != BLK_STS_OK)
 337                 return ret;
 338
 339         cmd->cmd_len = 16;
 340         memset(cmd->cmnd, 0, cmd->cmd_len);
 341         cmd->cmnd[0] = ZBC_OUT;
 342         cmd->cmnd[1] = op;
 343         if (all)
 344                 cmd->cmnd[14] = 0x1;
 345         else
 346                 put_unaligned_be64(block, &cmd->cmnd[2]);
 347
 348         rq->timeout = SD_TIMEOUT;
 349         cmd->sc_data_direction = DMA_NONE;
 350         cmd->transfersize = 0;
 351         cmd->allowed = 0;
 352
 353         return BLK_STS_OK;
 354 }
 355
 356 /**
 357  * sd_zbc_complete - ZBC command post processing.
 358  * @cmd: Completed command
 359  * @good_bytes: Command reply bytes
 360  * @sshdr: command sense header
 361  *
 362  * Called from sd_done() to handle zone commands errors and updates to the
 363  * device queue zone write pointer offset cahce.
 364  */
 365 unsigned int sd_zbc_complete(struct scsi_cmnd *cmd, unsigned int good_bytes,
 366                      struct scsi_sense_hdr *sshdr)
 367 {
 368         int result = cmd->result;
 369         struct request *rq = scsi_cmd_to_rq(cmd);
 370
 371         if (op_is_zone_mgmt(req_op(rq)) &&
 372             result &&
 373             sshdr->sense_key == ILLEGAL_REQUEST &&
 374             sshdr->asc == 0x24) {
 375                 /*
 376                  * INVALID FIELD IN CDB error: a zone management command was
 377                  * attempted on a conventional zone. Nothing to worry about,
 378                  * so be quiet about the error.
 379                  */
 380                 rq->rq_flags |= RQF_QUIET;
 381         }
 382
 383         return good_bytes;
 384 }
 385
 386 /**
 387  * sd_zbc_check_zoned_characteristics - Check zoned block device characteristics
 388  * @sdkp: Target disk
 389  * @buf: Buffer where to store the VPD page data
 390  *
 391  * Read VPD page B6, get information and check that reads are unconstrained.
 392  */
 393 static int sd_zbc_check_zoned_characteristics(struct scsi_disk *sdkp,
 394                                               unsigned char *buf)
 395 {
 396         u64 zone_starting_lba_gran;
 397
 398         if (scsi_get_vpd_page(sdkp->device, 0xb6, buf, 64)) {
 399                 sd_printk(KERN_NOTICE, sdkp,
 400                           "Read zoned characteristics VPD page failed\n");
 401                 return -ENODEV;
 402         }
 403
 404         if (sdkp->device->type != TYPE_ZBC) {
 405                 /* Host-aware */
 406                 sdkp->urswrz = 1;
 407                 sdkp->zones_optimal_open = get_unaligned_be32(&buf[8]);
 408                 sdkp->zones_optimal_nonseq = get_unaligned_be32(&buf[12]);
 409                 sdkp->zones_max_open = 0;
 410                 return 0;
 411         }
 412
 413         /* Host-managed */
 414         sdkp->urswrz = buf[4] & 1;
 415         sdkp->zones_optimal_open = 0;
 416         sdkp->zones_optimal_nonseq = 0;
 417         sdkp->zones_max_open = get_unaligned_be32(&buf[16]);
 418         /* Check zone alignment method */
 419         switch (buf[23] & 0xf) {
 420         case 0:
 421         case ZBC_CONSTANT_ZONE_LENGTH:
 422                 /* Use zone length */
 423                 break;
 424         case ZBC_CONSTANT_ZONE_START_OFFSET:
 425                 zone_starting_lba_gran = get_unaligned_be64(&buf[24]);
 426                 if (zone_starting_lba_gran == 0 ||
 427                     !is_power_of_2(zone_starting_lba_gran) ||
 428                     logical_to_sectors(sdkp->device, zone_starting_lba_gran) >
 429                     UINT_MAX) {
 430                         sd_printk(KERN_ERR, sdkp,
 431                                   "Invalid zone starting LBA granularity %llu\n",
 432                                   zone_starting_lba_gran);
 433                         return -ENODEV;
 434                 }
 435                 sdkp->zone_starting_lba_gran = zone_starting_lba_gran;
 436                 break;
 437         default:
 438                 sd_printk(KERN_ERR, sdkp, "Invalid zone alignment method\n");
 439                 return -ENODEV;
 440         }
 441
 442         /*
 443          * Check for unconstrained reads: host-managed devices with
 444          * constrained reads (drives failing read after write pointer)
 445          * are not supported.
 446          */
 447         if (!sdkp->urswrz) {
 448                 if (sdkp->first_scan)
 449                         sd_printk(KERN_NOTICE, sdkp,
 450                           "constrained reads devices are not supported\n");
 451                 return -ENODEV;
 452         }
 453
 454         return 0;
 455 }
 456
 457 /**
 458  * sd_zbc_check_capacity - Check the device capacity
 459  * @sdkp: Target disk
 460  * @buf: command buffer
 461  * @zblocks: zone size in logical blocks
 462  *
 463  * Get the device zone size and check that the device capacity as reported
 464  * by READ CAPACITY matches the max_lba value (plus one) of the report zones
 465  * command reply for devices with RC_BASIS == 0.
 466  *
 467  * Returns 0 upon success or an error code upon failure.
 468  */
 469 static int sd_zbc_check_capacity(struct scsi_disk *sdkp, unsigned char *buf,
 470                                  u32 *zblocks)
 471 {
 472         u64 zone_blocks;
 473         sector_t max_lba;
 474         unsigned char *rec;
 475         int ret;
 476
 477         /* Do a report zone to get max_lba and the size of the first zone */
 478         ret = sd_zbc_do_report_zones(sdkp, buf, SD_BUF_SIZE, 0, false);
 479         if (ret)
 480                 return ret;
 481
 482         if (sdkp->rc_basis == 0) {
 483                 /* The max_lba field is the capacity of this device */
 484                 max_lba = get_unaligned_be64(&buf[8]);
 485                 if (sdkp->capacity != max_lba + 1) {
 486                         if (sdkp->first_scan)
 487                                 sd_printk(KERN_WARNING, sdkp,
 488                                         "Changing capacity from %llu to max LBA+1 %llu\n",
 489                                         (unsigned long long)sdkp->capacity,
 490                                         (unsigned long long)max_lba + 1);
 491                         sdkp->capacity = max_lba + 1;
 492                 }
 493         }
 494
 495         if (sdkp->zone_starting_lba_gran == 0) {
 496                 /* Get the size of the first reported zone */
 497                 rec = buf + 64;
 498                 zone_blocks = get_unaligned_be64(&rec[8]);
 499                 if (logical_to_sectors(sdkp->device, zone_blocks) > UINT_MAX) {
 500                         if (sdkp->first_scan)
 501                                 sd_printk(KERN_NOTICE, sdkp,
 502                                           "Zone size too large\n");
 503                         return -EFBIG;
 504                 }
 505         } else {
 506                 zone_blocks = sdkp->zone_starting_lba_gran;
 507         }
 508
 509         if (!is_power_of_2(zone_blocks)) {
 510                 sd_printk(KERN_ERR, sdkp,
 511                           "Zone size %llu is not a power of two.\n",
 512                           zone_blocks);
 513                 return -EINVAL;
 514         }
 515
 516         *zblocks = zone_blocks;
 517
 518         return 0;
 519 }
 520
 521 static void sd_zbc_print_zones(struct scsi_disk *sdkp)
 522 {
 523         if (sdkp->device->type != TYPE_ZBC || !sdkp->capacity)
 524                 return;
 525
 526         if (sdkp->capacity & (sdkp->zone_info.zone_blocks - 1))
 527                 sd_printk(KERN_NOTICE, sdkp,
 528                           "%u zones of %u logical blocks + 1 runt zone\n",
 529                           sdkp->zone_info.nr_zones - 1,
 530                           sdkp->zone_info.zone_blocks);
 531         else
 532                 sd_printk(KERN_NOTICE, sdkp,
 533                           "%u zones of %u logical blocks\n",
 534                           sdkp->zone_info.nr_zones,
 535                           sdkp->zone_info.zone_blocks);
 536 }
 537
 538 /*
 539  * Call blk_revalidate_disk_zones() if any of the zoned disk properties have
 540  * changed that make it necessary to call that function. Called by
 541  * sd_revalidate_disk() after the gendisk capacity has been set.
 542  */
 543 int sd_zbc_revalidate_zones(struct scsi_disk *sdkp)
 544 {
 545         struct gendisk *disk = sdkp->disk;
 546         struct request_queue *q = disk->queue;
 547         u32 zone_blocks = sdkp->early_zone_info.zone_blocks;
 548         unsigned int nr_zones = sdkp->early_zone_info.nr_zones;
 549         unsigned int flags;
 550         int ret;
 551
 552         /*
 553          * There is nothing to do for regular disks, including host-aware disks
 554          * that have partitions.
 555          */
 556         if (!blk_queue_is_zoned(q))
 557                 return 0;
 558
 559         if (sdkp->zone_info.zone_blocks == zone_blocks &&
 560             sdkp->zone_info.nr_zones == nr_zones &&
 561             disk->nr_zones == nr_zones)
 562                 return 0;
 563
 564         sdkp->zone_info.zone_blocks = zone_blocks;
 565         sdkp->zone_info.nr_zones = nr_zones;
 566
 567         flags = memalloc_noio_save();
 568         ret = blk_revalidate_disk_zones(disk);
 569         memalloc_noio_restore(flags);
 570         if (ret) {
 571                 sdkp->zone_info = (struct zoned_disk_info){ };
 572                 sdkp->capacity = 0;
 573                 return ret;
 574         }
 575
 576         sd_zbc_print_zones(sdkp);
 577
 578         return 0;
 579 }
 580
 581 /**
 582  * sd_zbc_read_zones - Read zone information and update the request queue
 583  * @sdkp: SCSI disk pointer.
 584  * @lim: queue limits to read into
 585  * @buf: 512 byte buffer used for storing SCSI command output.
 586  *
 587  * Read zone information and update the request queue zone characteristics and
 588  * also the zoned device information in *sdkp. Called by sd_revalidate_disk()
 589  * before the gendisk capacity has been set.
 590  */
 591 int sd_zbc_read_zones(struct scsi_disk *sdkp, struct queue_limits *lim,
 592                 u8 buf[SD_BUF_SIZE])
 593 {
 594         unsigned int nr_zones;
 595         u32 zone_blocks = 0;
 596         int ret;
 597
 598         if (sdkp->device->type != TYPE_ZBC)
 599                 return 0;
 600
 601         lim->features |= BLK_FEAT_ZONED;
 602
 603         /*
 604          * Per ZBC and ZAC specifications, writes in sequential write required
 605          * zones of host-managed devices must be aligned to the device physical
 606          * block size.
 607          */
 608         lim->zone_write_granularity = sdkp->physical_block_size;
 609
 610         /* READ16/WRITE16/SYNC16 is mandatory for ZBC devices */
 611         sdkp->device->use_16_for_rw = 1;
 612         sdkp->device->use_10_for_rw = 0;
 613         sdkp->device->use_16_for_sync = 1;
 614
 615         /* Check zoned block device characteristics (unconstrained reads) */
 616         ret = sd_zbc_check_zoned_characteristics(sdkp, buf);
 617         if (ret)
 618                 goto err;
 619
 620         /* Check the device capacity reported by report zones */
 621         ret = sd_zbc_check_capacity(sdkp, buf, &zone_blocks);
 622         if (ret != 0)
 623                 goto err;
 624
 625         nr_zones = round_up(sdkp->capacity, zone_blocks) >> ilog2(zone_blocks);
 626         sdkp->early_zone_info.nr_zones = nr_zones;
 627         sdkp->early_zone_info.zone_blocks = zone_blocks;
 628
 629         /* The drive satisfies the kernel restrictions: set it up */
 630         if (sdkp->zones_max_open == U32_MAX)
 631                 lim->max_open_zones = 0;
 632         else
 633                 lim->max_open_zones = sdkp->zones_max_open;
 634         lim->max_active_zones = 0;
 635         lim->chunk_sectors = logical_to_sectors(sdkp->device, zone_blocks);
 636
 637         return 0;
 638
 639 err:
 640         sdkp->capacity = 0;
 641
 642         return ret;
 643 }