mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-27 19:29:37 +00:00
![Damien Le Moal](/assets/img/avatar_default.png)
The block layer now handles zone write locking. [mkp: removed SCMD_ZONE_WRITE_LOCK reference in scsi_debugfs] Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
742 lines
18 KiB
C
742 lines
18 KiB
C
/*
|
|
* SCSI Zoned Block commands
|
|
*
|
|
* Copyright (C) 2014-2015 SUSE Linux GmbH
|
|
* Written by: Hannes Reinecke <hare@suse.de>
|
|
* Modified by: Damien Le Moal <damien.lemoal@hgst.com>
|
|
* Modified by: Shaun Tancheff <shaun.tancheff@seagate.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License version
|
|
* 2 as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it will be useful, but
|
|
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; see the file COPYING. If not, write to
|
|
* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139,
|
|
* USA.
|
|
*
|
|
*/
|
|
|
|
#include <linux/blkdev.h>
|
|
|
|
#include <asm/unaligned.h>
|
|
|
|
#include <scsi/scsi.h>
|
|
#include <scsi/scsi_cmnd.h>
|
|
|
|
#include "sd.h"
|
|
|
|
/**
|
|
* sd_zbc_parse_report - Convert a zone descriptor to a struct blk_zone,
|
|
* @sdkp: The disk the report originated from
|
|
* @buf: Address of the report zone descriptor
|
|
* @zone: the destination zone structure
|
|
*
|
|
* All LBA sized values are converted to 512B sectors unit.
|
|
*/
|
|
static void sd_zbc_parse_report(struct scsi_disk *sdkp, u8 *buf,
|
|
struct blk_zone *zone)
|
|
{
|
|
struct scsi_device *sdp = sdkp->device;
|
|
|
|
memset(zone, 0, sizeof(struct blk_zone));
|
|
|
|
zone->type = buf[0] & 0x0f;
|
|
zone->cond = (buf[1] >> 4) & 0xf;
|
|
if (buf[1] & 0x01)
|
|
zone->reset = 1;
|
|
if (buf[1] & 0x02)
|
|
zone->non_seq = 1;
|
|
|
|
zone->len = logical_to_sectors(sdp, get_unaligned_be64(&buf[8]));
|
|
zone->start = logical_to_sectors(sdp, get_unaligned_be64(&buf[16]));
|
|
zone->wp = logical_to_sectors(sdp, get_unaligned_be64(&buf[24]));
|
|
if (zone->type != ZBC_ZONE_TYPE_CONV &&
|
|
zone->cond == ZBC_ZONE_COND_FULL)
|
|
zone->wp = zone->start + zone->len;
|
|
}
|
|
|
|
/**
|
|
* sd_zbc_report_zones - Issue a REPORT ZONES scsi command.
|
|
* @sdkp: The target disk
|
|
* @buf: Buffer to use for the reply
|
|
* @buflen: the buffer size
|
|
* @lba: Start LBA of the report
|
|
*
|
|
* For internal use during device validation.
|
|
*/
|
|
static int sd_zbc_report_zones(struct scsi_disk *sdkp, unsigned char *buf,
|
|
unsigned int buflen, sector_t lba)
|
|
{
|
|
struct scsi_device *sdp = sdkp->device;
|
|
const int timeout = sdp->request_queue->rq_timeout;
|
|
struct scsi_sense_hdr sshdr;
|
|
unsigned char cmd[16];
|
|
unsigned int rep_len;
|
|
int result;
|
|
|
|
memset(cmd, 0, 16);
|
|
cmd[0] = ZBC_IN;
|
|
cmd[1] = ZI_REPORT_ZONES;
|
|
put_unaligned_be64(lba, &cmd[2]);
|
|
put_unaligned_be32(buflen, &cmd[10]);
|
|
memset(buf, 0, buflen);
|
|
|
|
result = scsi_execute_req(sdp, cmd, DMA_FROM_DEVICE,
|
|
buf, buflen, &sshdr,
|
|
timeout, SD_MAX_RETRIES, NULL);
|
|
if (result) {
|
|
sd_printk(KERN_ERR, sdkp,
|
|
"REPORT ZONES lba %llu failed with %d/%d\n",
|
|
(unsigned long long)lba,
|
|
host_byte(result), driver_byte(result));
|
|
return -EIO;
|
|
}
|
|
|
|
rep_len = get_unaligned_be32(&buf[0]);
|
|
if (rep_len < 64) {
|
|
sd_printk(KERN_ERR, sdkp,
|
|
"REPORT ZONES report invalid length %u\n",
|
|
rep_len);
|
|
return -EIO;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* sd_zbc_setup_report_cmnd - Prepare a REPORT ZONES scsi command
|
|
* @cmd: The command to setup
|
|
*
|
|
* Call in sd_init_command() for a REQ_OP_ZONE_REPORT request.
|
|
*/
|
|
int sd_zbc_setup_report_cmnd(struct scsi_cmnd *cmd)
|
|
{
|
|
struct request *rq = cmd->request;
|
|
struct scsi_disk *sdkp = scsi_disk(rq->rq_disk);
|
|
sector_t lba, sector = blk_rq_pos(rq);
|
|
unsigned int nr_bytes = blk_rq_bytes(rq);
|
|
int ret;
|
|
|
|
WARN_ON(nr_bytes == 0);
|
|
|
|
if (!sd_is_zoned(sdkp))
|
|
/* Not a zoned device */
|
|
return BLKPREP_KILL;
|
|
|
|
ret = scsi_init_io(cmd);
|
|
if (ret != BLKPREP_OK)
|
|
return ret;
|
|
|
|
cmd->cmd_len = 16;
|
|
memset(cmd->cmnd, 0, cmd->cmd_len);
|
|
cmd->cmnd[0] = ZBC_IN;
|
|
cmd->cmnd[1] = ZI_REPORT_ZONES;
|
|
lba = sectors_to_logical(sdkp->device, sector);
|
|
put_unaligned_be64(lba, &cmd->cmnd[2]);
|
|
put_unaligned_be32(nr_bytes, &cmd->cmnd[10]);
|
|
/* Do partial report for speeding things up */
|
|
cmd->cmnd[14] = ZBC_REPORT_ZONE_PARTIAL;
|
|
|
|
cmd->sc_data_direction = DMA_FROM_DEVICE;
|
|
cmd->sdb.length = nr_bytes;
|
|
cmd->transfersize = sdkp->device->sector_size;
|
|
cmd->allowed = 0;
|
|
|
|
/*
|
|
* Report may return less bytes than requested. Make sure
|
|
* to report completion on the entire initial request.
|
|
*/
|
|
rq->__data_len = nr_bytes;
|
|
|
|
return BLKPREP_OK;
|
|
}
|
|
|
|
/**
|
|
* sd_zbc_report_zones_complete - Process a REPORT ZONES scsi command reply.
|
|
* @scmd: The completed report zones command
|
|
* @good_bytes: reply size in bytes
|
|
*
|
|
* Convert all reported zone descriptors to struct blk_zone. The conversion
|
|
* is done in-place, directly in the request specified sg buffer.
|
|
*/
|
|
static void sd_zbc_report_zones_complete(struct scsi_cmnd *scmd,
|
|
unsigned int good_bytes)
|
|
{
|
|
struct request *rq = scmd->request;
|
|
struct scsi_disk *sdkp = scsi_disk(rq->rq_disk);
|
|
struct sg_mapping_iter miter;
|
|
struct blk_zone_report_hdr hdr;
|
|
struct blk_zone zone;
|
|
unsigned int offset, bytes = 0;
|
|
unsigned long flags;
|
|
u8 *buf;
|
|
|
|
if (good_bytes < 64)
|
|
return;
|
|
|
|
memset(&hdr, 0, sizeof(struct blk_zone_report_hdr));
|
|
|
|
sg_miter_start(&miter, scsi_sglist(scmd), scsi_sg_count(scmd),
|
|
SG_MITER_TO_SG | SG_MITER_ATOMIC);
|
|
|
|
local_irq_save(flags);
|
|
while (sg_miter_next(&miter) && bytes < good_bytes) {
|
|
|
|
buf = miter.addr;
|
|
offset = 0;
|
|
|
|
if (bytes == 0) {
|
|
/* Set the report header */
|
|
hdr.nr_zones = min_t(unsigned int,
|
|
(good_bytes - 64) / 64,
|
|
get_unaligned_be32(&buf[0]) / 64);
|
|
memcpy(buf, &hdr, sizeof(struct blk_zone_report_hdr));
|
|
offset += 64;
|
|
bytes += 64;
|
|
}
|
|
|
|
/* Parse zone descriptors */
|
|
while (offset < miter.length && hdr.nr_zones) {
|
|
WARN_ON(offset > miter.length);
|
|
buf = miter.addr + offset;
|
|
sd_zbc_parse_report(sdkp, buf, &zone);
|
|
memcpy(buf, &zone, sizeof(struct blk_zone));
|
|
offset += 64;
|
|
bytes += 64;
|
|
hdr.nr_zones--;
|
|
}
|
|
|
|
if (!hdr.nr_zones)
|
|
break;
|
|
|
|
}
|
|
sg_miter_stop(&miter);
|
|
local_irq_restore(flags);
|
|
}
|
|
|
|
/**
|
|
* sd_zbc_zone_sectors - Get the device zone size in number of 512B sectors.
|
|
* @sdkp: The target disk
|
|
*/
|
|
static inline sector_t sd_zbc_zone_sectors(struct scsi_disk *sdkp)
|
|
{
|
|
return logical_to_sectors(sdkp->device, sdkp->zone_blocks);
|
|
}
|
|
|
|
/**
|
|
* sd_zbc_setup_reset_cmnd - Prepare a RESET WRITE POINTER scsi command.
|
|
* @cmd: the command to setup
|
|
*
|
|
* Called from sd_init_command() for a REQ_OP_ZONE_RESET request.
|
|
*/
|
|
int sd_zbc_setup_reset_cmnd(struct scsi_cmnd *cmd)
|
|
{
|
|
struct request *rq = cmd->request;
|
|
struct scsi_disk *sdkp = scsi_disk(rq->rq_disk);
|
|
sector_t sector = blk_rq_pos(rq);
|
|
sector_t block = sectors_to_logical(sdkp->device, sector);
|
|
|
|
if (!sd_is_zoned(sdkp))
|
|
/* Not a zoned device */
|
|
return BLKPREP_KILL;
|
|
|
|
if (sdkp->device->changed)
|
|
return BLKPREP_KILL;
|
|
|
|
if (sector & (sd_zbc_zone_sectors(sdkp) - 1))
|
|
/* Unaligned request */
|
|
return BLKPREP_KILL;
|
|
|
|
cmd->cmd_len = 16;
|
|
memset(cmd->cmnd, 0, cmd->cmd_len);
|
|
cmd->cmnd[0] = ZBC_OUT;
|
|
cmd->cmnd[1] = ZO_RESET_WRITE_POINTER;
|
|
put_unaligned_be64(block, &cmd->cmnd[2]);
|
|
|
|
rq->timeout = SD_TIMEOUT;
|
|
cmd->sc_data_direction = DMA_NONE;
|
|
cmd->transfersize = 0;
|
|
cmd->allowed = 0;
|
|
|
|
return BLKPREP_OK;
|
|
}
|
|
|
|
/**
|
|
* sd_zbc_complete - ZBC command post processing.
|
|
* @cmd: Completed command
|
|
* @good_bytes: Command reply bytes
|
|
* @sshdr: command sense header
|
|
*
|
|
* Called from sd_done(). Process report zones reply and handle reset zone
|
|
* and write commands errors.
|
|
*/
|
|
void sd_zbc_complete(struct scsi_cmnd *cmd, unsigned int good_bytes,
|
|
struct scsi_sense_hdr *sshdr)
|
|
{
|
|
int result = cmd->result;
|
|
struct request *rq = cmd->request;
|
|
|
|
switch (req_op(rq)) {
|
|
case REQ_OP_ZONE_RESET:
|
|
|
|
if (result &&
|
|
sshdr->sense_key == ILLEGAL_REQUEST &&
|
|
sshdr->asc == 0x24)
|
|
/*
|
|
* INVALID FIELD IN CDB error: reset of a conventional
|
|
* zone was attempted. Nothing to worry about, so be
|
|
* quiet about the error.
|
|
*/
|
|
rq->rq_flags |= RQF_QUIET;
|
|
break;
|
|
|
|
case REQ_OP_WRITE:
|
|
case REQ_OP_WRITE_ZEROES:
|
|
case REQ_OP_WRITE_SAME:
|
|
|
|
if (result &&
|
|
sshdr->sense_key == ILLEGAL_REQUEST &&
|
|
sshdr->asc == 0x21)
|
|
/*
|
|
* INVALID ADDRESS FOR WRITE error: It is unlikely that
|
|
* retrying write requests failed with any kind of
|
|
* alignement error will result in success. So don't.
|
|
*/
|
|
cmd->allowed = 0;
|
|
break;
|
|
|
|
case REQ_OP_ZONE_REPORT:
|
|
|
|
if (!result)
|
|
sd_zbc_report_zones_complete(cmd, good_bytes);
|
|
break;
|
|
|
|
}
|
|
}
|
|
|
|
/**
|
|
* sd_zbc_read_zoned_characteristics - Read zoned block device characteristics
|
|
* @sdkp: Target disk
|
|
* @buf: Buffer where to store the VPD page data
|
|
*
|
|
* Read VPD page B6.
|
|
*/
|
|
static int sd_zbc_read_zoned_characteristics(struct scsi_disk *sdkp,
|
|
unsigned char *buf)
|
|
{
|
|
|
|
if (scsi_get_vpd_page(sdkp->device, 0xb6, buf, 64)) {
|
|
sd_printk(KERN_NOTICE, sdkp,
|
|
"Unconstrained-read check failed\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
if (sdkp->device->type != TYPE_ZBC) {
|
|
/* Host-aware */
|
|
sdkp->urswrz = 1;
|
|
sdkp->zones_optimal_open = get_unaligned_be32(&buf[8]);
|
|
sdkp->zones_optimal_nonseq = get_unaligned_be32(&buf[12]);
|
|
sdkp->zones_max_open = 0;
|
|
} else {
|
|
/* Host-managed */
|
|
sdkp->urswrz = buf[4] & 1;
|
|
sdkp->zones_optimal_open = 0;
|
|
sdkp->zones_optimal_nonseq = 0;
|
|
sdkp->zones_max_open = get_unaligned_be32(&buf[16]);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* sd_zbc_check_capacity - Check reported capacity.
|
|
* @sdkp: Target disk
|
|
* @buf: Buffer to use for commands
|
|
*
|
|
* ZBC drive may report only the capacity of the first conventional zones at
|
|
* LBA 0. This is indicated by the RC_BASIS field of the read capacity reply.
|
|
* Check this here. If the disk reported only its conventional zones capacity,
|
|
* get the total capacity by doing a report zones.
|
|
*/
|
|
static int sd_zbc_check_capacity(struct scsi_disk *sdkp, unsigned char *buf)
|
|
{
|
|
sector_t lba;
|
|
int ret;
|
|
|
|
if (sdkp->rc_basis != 0)
|
|
return 0;
|
|
|
|
/* Do a report zone to get the maximum LBA to check capacity */
|
|
ret = sd_zbc_report_zones(sdkp, buf, SD_BUF_SIZE, 0);
|
|
if (ret)
|
|
return ret;
|
|
|
|
/* The max_lba field is the capacity of this device */
|
|
lba = get_unaligned_be64(&buf[8]);
|
|
if (lba + 1 == sdkp->capacity)
|
|
return 0;
|
|
|
|
if (sdkp->first_scan)
|
|
sd_printk(KERN_WARNING, sdkp,
|
|
"Changing capacity from %llu to max LBA+1 %llu\n",
|
|
(unsigned long long)sdkp->capacity,
|
|
(unsigned long long)lba + 1);
|
|
sdkp->capacity = lba + 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
#define SD_ZBC_BUF_SIZE 131072U
|
|
|
|
/**
|
|
* sd_zbc_check_zone_size - Check the device zone sizes
|
|
* @sdkp: Target disk
|
|
*
|
|
* Check that all zones of the device are equal. The last zone can however
|
|
* be smaller. The zone size must also be a power of two number of LBAs.
|
|
*/
|
|
static int sd_zbc_check_zone_size(struct scsi_disk *sdkp)
|
|
{
|
|
u64 zone_blocks;
|
|
sector_t block = 0;
|
|
unsigned char *buf;
|
|
unsigned char *rec;
|
|
unsigned int buf_len;
|
|
unsigned int list_length;
|
|
int ret;
|
|
u8 same;
|
|
|
|
sdkp->zone_blocks = 0;
|
|
|
|
/* Get a buffer */
|
|
buf = kmalloc(SD_ZBC_BUF_SIZE, GFP_KERNEL);
|
|
if (!buf)
|
|
return -ENOMEM;
|
|
|
|
/* Do a report zone to get the same field */
|
|
ret = sd_zbc_report_zones(sdkp, buf, SD_ZBC_BUF_SIZE, 0);
|
|
if (ret) {
|
|
zone_blocks = 0;
|
|
goto out;
|
|
}
|
|
|
|
same = buf[4] & 0x0f;
|
|
if (same > 0) {
|
|
rec = &buf[64];
|
|
zone_blocks = get_unaligned_be64(&rec[8]);
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* Check the size of all zones: all zones must be of
|
|
* equal size, except the last zone which can be smaller
|
|
* than other zones.
|
|
*/
|
|
do {
|
|
|
|
/* Parse REPORT ZONES header */
|
|
list_length = get_unaligned_be32(&buf[0]) + 64;
|
|
rec = buf + 64;
|
|
buf_len = min(list_length, SD_ZBC_BUF_SIZE);
|
|
|
|
/* Parse zone descriptors */
|
|
while (rec < buf + buf_len) {
|
|
zone_blocks = get_unaligned_be64(&rec[8]);
|
|
if (sdkp->zone_blocks == 0) {
|
|
sdkp->zone_blocks = zone_blocks;
|
|
} else if (zone_blocks != sdkp->zone_blocks &&
|
|
(block + zone_blocks < sdkp->capacity
|
|
|| zone_blocks > sdkp->zone_blocks)) {
|
|
zone_blocks = 0;
|
|
goto out;
|
|
}
|
|
block += zone_blocks;
|
|
rec += 64;
|
|
}
|
|
|
|
if (block < sdkp->capacity) {
|
|
ret = sd_zbc_report_zones(sdkp, buf,
|
|
SD_ZBC_BUF_SIZE, block);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
} while (block < sdkp->capacity);
|
|
|
|
zone_blocks = sdkp->zone_blocks;
|
|
|
|
out:
|
|
kfree(buf);
|
|
|
|
if (!zone_blocks) {
|
|
if (sdkp->first_scan)
|
|
sd_printk(KERN_NOTICE, sdkp,
|
|
"Devices with non constant zone "
|
|
"size are not supported\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
if (!is_power_of_2(zone_blocks)) {
|
|
if (sdkp->first_scan)
|
|
sd_printk(KERN_NOTICE, sdkp,
|
|
"Devices with non power of 2 zone "
|
|
"size are not supported\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
if (logical_to_sectors(sdkp->device, zone_blocks) > UINT_MAX) {
|
|
if (sdkp->first_scan)
|
|
sd_printk(KERN_NOTICE, sdkp,
|
|
"Zone size too large\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
sdkp->zone_blocks = zone_blocks;
|
|
sdkp->zone_shift = ilog2(zone_blocks);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* sd_zbc_alloc_zone_bitmap - Allocate a zone bitmap (one bit per zone).
|
|
* @sdkp: The disk of the bitmap
|
|
*/
|
|
static inline unsigned long *sd_zbc_alloc_zone_bitmap(struct scsi_disk *sdkp)
|
|
{
|
|
struct request_queue *q = sdkp->disk->queue;
|
|
|
|
return kzalloc_node(BITS_TO_LONGS(sdkp->nr_zones)
|
|
* sizeof(unsigned long),
|
|
GFP_KERNEL, q->node);
|
|
}
|
|
|
|
/**
|
|
* sd_zbc_get_seq_zones - Parse report zones reply to identify sequential zones
|
|
* @sdkp: disk used
|
|
* @buf: report reply buffer
|
|
* @seq_zone_bitamp: bitmap of sequential zones to set
|
|
*
|
|
* Parse reported zone descriptors in @buf to identify sequential zones and
|
|
* set the reported zone bit in @seq_zones_bitmap accordingly.
|
|
* Since read-only and offline zones cannot be written, do not
|
|
* mark them as sequential in the bitmap.
|
|
* Return the LBA after the last zone reported.
|
|
*/
|
|
static sector_t sd_zbc_get_seq_zones(struct scsi_disk *sdkp, unsigned char *buf,
|
|
unsigned int buflen,
|
|
unsigned long *seq_zones_bitmap)
|
|
{
|
|
sector_t lba, next_lba = sdkp->capacity;
|
|
unsigned int buf_len, list_length;
|
|
unsigned char *rec;
|
|
u8 type, cond;
|
|
|
|
list_length = get_unaligned_be32(&buf[0]) + 64;
|
|
buf_len = min(list_length, buflen);
|
|
rec = buf + 64;
|
|
|
|
while (rec < buf + buf_len) {
|
|
type = rec[0] & 0x0f;
|
|
cond = (rec[1] >> 4) & 0xf;
|
|
lba = get_unaligned_be64(&rec[16]);
|
|
if (type != ZBC_ZONE_TYPE_CONV &&
|
|
cond != ZBC_ZONE_COND_READONLY &&
|
|
cond != ZBC_ZONE_COND_OFFLINE)
|
|
set_bit(lba >> sdkp->zone_shift, seq_zones_bitmap);
|
|
next_lba = lba + get_unaligned_be64(&rec[8]);
|
|
rec += 64;
|
|
}
|
|
|
|
return next_lba;
|
|
}
|
|
|
|
/**
|
|
* sd_zbc_setup_seq_zones_bitmap - Initialize the disk seq zone bitmap.
|
|
* @sdkp: target disk
|
|
*
|
|
* Allocate a zone bitmap and initialize it by identifying sequential zones.
|
|
*/
|
|
static int sd_zbc_setup_seq_zones_bitmap(struct scsi_disk *sdkp)
|
|
{
|
|
struct request_queue *q = sdkp->disk->queue;
|
|
unsigned long *seq_zones_bitmap;
|
|
sector_t lba = 0;
|
|
unsigned char *buf;
|
|
int ret = -ENOMEM;
|
|
|
|
seq_zones_bitmap = sd_zbc_alloc_zone_bitmap(sdkp);
|
|
if (!seq_zones_bitmap)
|
|
return -ENOMEM;
|
|
|
|
buf = kmalloc(SD_ZBC_BUF_SIZE, GFP_KERNEL);
|
|
if (!buf)
|
|
goto out;
|
|
|
|
while (lba < sdkp->capacity) {
|
|
ret = sd_zbc_report_zones(sdkp, buf, SD_ZBC_BUF_SIZE, lba);
|
|
if (ret)
|
|
goto out;
|
|
lba = sd_zbc_get_seq_zones(sdkp, buf, SD_ZBC_BUF_SIZE,
|
|
seq_zones_bitmap);
|
|
}
|
|
|
|
if (lba != sdkp->capacity) {
|
|
/* Something went wrong */
|
|
ret = -EIO;
|
|
}
|
|
|
|
out:
|
|
kfree(buf);
|
|
if (ret) {
|
|
kfree(seq_zones_bitmap);
|
|
return ret;
|
|
}
|
|
|
|
q->seq_zones_bitmap = seq_zones_bitmap;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void sd_zbc_cleanup(struct scsi_disk *sdkp)
|
|
{
|
|
struct request_queue *q = sdkp->disk->queue;
|
|
|
|
kfree(q->seq_zones_bitmap);
|
|
q->seq_zones_bitmap = NULL;
|
|
|
|
kfree(q->seq_zones_wlock);
|
|
q->seq_zones_wlock = NULL;
|
|
|
|
q->nr_zones = 0;
|
|
}
|
|
|
|
static int sd_zbc_setup(struct scsi_disk *sdkp)
|
|
{
|
|
struct request_queue *q = sdkp->disk->queue;
|
|
int ret;
|
|
|
|
/* READ16/WRITE16 is mandatory for ZBC disks */
|
|
sdkp->device->use_16_for_rw = 1;
|
|
sdkp->device->use_10_for_rw = 0;
|
|
|
|
/* chunk_sectors indicates the zone size */
|
|
blk_queue_chunk_sectors(sdkp->disk->queue,
|
|
logical_to_sectors(sdkp->device, sdkp->zone_blocks));
|
|
sdkp->nr_zones =
|
|
round_up(sdkp->capacity, sdkp->zone_blocks) >> sdkp->zone_shift;
|
|
|
|
/*
|
|
* Initialize the device request queue information if the number
|
|
* of zones changed.
|
|
*/
|
|
if (sdkp->nr_zones != q->nr_zones) {
|
|
|
|
sd_zbc_cleanup(sdkp);
|
|
|
|
q->nr_zones = sdkp->nr_zones;
|
|
if (sdkp->nr_zones) {
|
|
q->seq_zones_wlock = sd_zbc_alloc_zone_bitmap(sdkp);
|
|
if (!q->seq_zones_wlock) {
|
|
ret = -ENOMEM;
|
|
goto err;
|
|
}
|
|
|
|
ret = sd_zbc_setup_seq_zones_bitmap(sdkp);
|
|
if (ret) {
|
|
sd_zbc_cleanup(sdkp);
|
|
goto err;
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
return 0;
|
|
|
|
err:
|
|
sd_zbc_cleanup(sdkp);
|
|
return ret;
|
|
}
|
|
|
|
int sd_zbc_read_zones(struct scsi_disk *sdkp, unsigned char *buf)
|
|
{
|
|
int ret;
|
|
|
|
if (!sd_is_zoned(sdkp))
|
|
/*
|
|
* Device managed or normal SCSI disk,
|
|
* no special handling required
|
|
*/
|
|
return 0;
|
|
|
|
/* Get zoned block device characteristics */
|
|
ret = sd_zbc_read_zoned_characteristics(sdkp, buf);
|
|
if (ret)
|
|
goto err;
|
|
|
|
/*
|
|
* Check for unconstrained reads: host-managed devices with
|
|
* constrained reads (drives failing read after write pointer)
|
|
* are not supported.
|
|
*/
|
|
if (!sdkp->urswrz) {
|
|
if (sdkp->first_scan)
|
|
sd_printk(KERN_NOTICE, sdkp,
|
|
"constrained reads devices are not supported\n");
|
|
ret = -ENODEV;
|
|
goto err;
|
|
}
|
|
|
|
/* Check capacity */
|
|
ret = sd_zbc_check_capacity(sdkp, buf);
|
|
if (ret)
|
|
goto err;
|
|
|
|
/*
|
|
* Check zone size: only devices with a constant zone size (except
|
|
* an eventual last runt zone) that is a power of 2 are supported.
|
|
*/
|
|
ret = sd_zbc_check_zone_size(sdkp);
|
|
if (ret)
|
|
goto err;
|
|
|
|
/* The drive satisfies the kernel restrictions: set it up */
|
|
ret = sd_zbc_setup(sdkp);
|
|
if (ret)
|
|
goto err;
|
|
|
|
return 0;
|
|
|
|
err:
|
|
sdkp->capacity = 0;
|
|
sd_zbc_cleanup(sdkp);
|
|
|
|
return ret;
|
|
}
|
|
|
|
void sd_zbc_remove(struct scsi_disk *sdkp)
|
|
{
|
|
sd_zbc_cleanup(sdkp);
|
|
}
|
|
|
|
void sd_zbc_print_zones(struct scsi_disk *sdkp)
|
|
{
|
|
if (!sd_is_zoned(sdkp) || !sdkp->capacity)
|
|
return;
|
|
|
|
if (sdkp->capacity & (sdkp->zone_blocks - 1))
|
|
sd_printk(KERN_NOTICE, sdkp,
|
|
"%u zones of %u logical blocks + 1 runt zone\n",
|
|
sdkp->nr_zones - 1,
|
|
sdkp->zone_blocks);
|
|
else
|
|
sd_printk(KERN_NOTICE, sdkp,
|
|
"%u zones of %u logical blocks\n",
|
|
sdkp->nr_zones,
|
|
sdkp->zone_blocks);
|
|
}
|