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![Bart Van Assche](/assets/img/avatar_default.png)
The SCSI core has been modified recently such that it only processes PM requests if rpm_status != RPM_ACTIVE. Since some Opal requests are submitted while rpm_status != RPM_ACTIVE, set flag RQF_PM for Opal requests. See also https://bugzilla.kernel.org/show_bug.cgi?id=211227. [mkp: updated sha for PM patch] Link: https://lore.kernel.org/r/20210222021042.3534-1-bvanassche@acm.org Fixes:d80210f25f
("sd: add support for TCG OPAL self encrypting disks") Fixes:e6044f714b
("scsi: core: Only process PM requests if rpm_status != RPM_ACTIVE") Cc: chriscjsus@yahoo.com Cc: Jens Axboe <axboe@kernel.dk> Cc: Alan Stern <stern@rowland.harvard.edu> Cc: stable@vger.kernel.org Reported-by: chriscjsus@yahoo.com Tested-by: chriscjsus@yahoo.com Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
3819 lines
100 KiB
C
3819 lines
100 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* sd.c Copyright (C) 1992 Drew Eckhardt
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* Copyright (C) 1993, 1994, 1995, 1999 Eric Youngdale
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*
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* Linux scsi disk driver
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* Initial versions: Drew Eckhardt
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* Subsequent revisions: Eric Youngdale
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* Modification history:
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* - Drew Eckhardt <drew@colorado.edu> original
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* - Eric Youngdale <eric@andante.org> add scatter-gather, multiple
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* outstanding request, and other enhancements.
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* Support loadable low-level scsi drivers.
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* - Jirka Hanika <geo@ff.cuni.cz> support more scsi disks using
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* eight major numbers.
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* - Richard Gooch <rgooch@atnf.csiro.au> support devfs.
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* - Torben Mathiasen <tmm@image.dk> Resource allocation fixes in
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* sd_init and cleanups.
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* - Alex Davis <letmein@erols.com> Fix problem where partition info
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* not being read in sd_open. Fix problem where removable media
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* could be ejected after sd_open.
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* - Douglas Gilbert <dgilbert@interlog.com> cleanup for lk 2.5.x
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* - Badari Pulavarty <pbadari@us.ibm.com>, Matthew Wilcox
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* <willy@debian.org>, Kurt Garloff <garloff@suse.de>:
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* Support 32k/1M disks.
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*
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* Logging policy (needs CONFIG_SCSI_LOGGING defined):
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* - setting up transfer: SCSI_LOG_HLQUEUE levels 1 and 2
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* - end of transfer (bh + scsi_lib): SCSI_LOG_HLCOMPLETE level 1
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* - entering sd_ioctl: SCSI_LOG_IOCTL level 1
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* - entering other commands: SCSI_LOG_HLQUEUE level 3
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* Note: when the logging level is set by the user, it must be greater
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* than the level indicated above to trigger output.
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*/
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#include <linux/module.h>
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#include <linux/fs.h>
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#include <linux/kernel.h>
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#include <linux/mm.h>
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#include <linux/bio.h>
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#include <linux/genhd.h>
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#include <linux/hdreg.h>
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#include <linux/errno.h>
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#include <linux/idr.h>
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#include <linux/interrupt.h>
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#include <linux/init.h>
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#include <linux/blkdev.h>
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#include <linux/blkpg.h>
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#include <linux/blk-pm.h>
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#include <linux/delay.h>
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#include <linux/mutex.h>
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#include <linux/string_helpers.h>
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#include <linux/async.h>
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#include <linux/slab.h>
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#include <linux/sed-opal.h>
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#include <linux/pm_runtime.h>
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#include <linux/pr.h>
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#include <linux/t10-pi.h>
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#include <linux/uaccess.h>
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#include <asm/unaligned.h>
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#include <scsi/scsi.h>
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#include <scsi/scsi_cmnd.h>
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#include <scsi/scsi_dbg.h>
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#include <scsi/scsi_device.h>
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#include <scsi/scsi_driver.h>
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#include <scsi/scsi_eh.h>
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#include <scsi/scsi_host.h>
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#include <scsi/scsi_ioctl.h>
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#include <scsi/scsicam.h>
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#include "sd.h"
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#include "scsi_priv.h"
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#include "scsi_logging.h"
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MODULE_AUTHOR("Eric Youngdale");
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MODULE_DESCRIPTION("SCSI disk (sd) driver");
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MODULE_LICENSE("GPL");
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MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK0_MAJOR);
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MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK1_MAJOR);
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MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK2_MAJOR);
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MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK3_MAJOR);
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MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK4_MAJOR);
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MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK5_MAJOR);
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MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK6_MAJOR);
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MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK7_MAJOR);
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MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK8_MAJOR);
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MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK9_MAJOR);
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MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK10_MAJOR);
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MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK11_MAJOR);
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MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK12_MAJOR);
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MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK13_MAJOR);
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MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK14_MAJOR);
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MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK15_MAJOR);
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MODULE_ALIAS_SCSI_DEVICE(TYPE_DISK);
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MODULE_ALIAS_SCSI_DEVICE(TYPE_MOD);
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MODULE_ALIAS_SCSI_DEVICE(TYPE_RBC);
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MODULE_ALIAS_SCSI_DEVICE(TYPE_ZBC);
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#if !defined(CONFIG_DEBUG_BLOCK_EXT_DEVT)
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#define SD_MINORS 16
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#else
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#define SD_MINORS 0
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#endif
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static void sd_config_discard(struct scsi_disk *, unsigned int);
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static void sd_config_write_same(struct scsi_disk *);
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static int sd_revalidate_disk(struct gendisk *);
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static void sd_unlock_native_capacity(struct gendisk *disk);
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static int sd_probe(struct device *);
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static int sd_remove(struct device *);
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static void sd_shutdown(struct device *);
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static int sd_suspend_system(struct device *);
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static int sd_suspend_runtime(struct device *);
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static int sd_resume(struct device *);
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static void sd_rescan(struct device *);
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static blk_status_t sd_init_command(struct scsi_cmnd *SCpnt);
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static void sd_uninit_command(struct scsi_cmnd *SCpnt);
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static int sd_done(struct scsi_cmnd *);
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static void sd_eh_reset(struct scsi_cmnd *);
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static int sd_eh_action(struct scsi_cmnd *, int);
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static void sd_read_capacity(struct scsi_disk *sdkp, unsigned char *buffer);
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static void scsi_disk_release(struct device *cdev);
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static DEFINE_IDA(sd_index_ida);
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/* This semaphore is used to mediate the 0->1 reference get in the
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* face of object destruction (i.e. we can't allow a get on an
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* object after last put) */
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static DEFINE_MUTEX(sd_ref_mutex);
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static struct kmem_cache *sd_cdb_cache;
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static mempool_t *sd_cdb_pool;
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static mempool_t *sd_page_pool;
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static const char *sd_cache_types[] = {
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"write through", "none", "write back",
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"write back, no read (daft)"
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};
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static void sd_set_flush_flag(struct scsi_disk *sdkp)
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{
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bool wc = false, fua = false;
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if (sdkp->WCE) {
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wc = true;
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if (sdkp->DPOFUA)
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fua = true;
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}
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blk_queue_write_cache(sdkp->disk->queue, wc, fua);
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}
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static ssize_t
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cache_type_store(struct device *dev, struct device_attribute *attr,
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const char *buf, size_t count)
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{
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int ct, rcd, wce, sp;
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struct scsi_disk *sdkp = to_scsi_disk(dev);
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struct scsi_device *sdp = sdkp->device;
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char buffer[64];
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char *buffer_data;
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struct scsi_mode_data data;
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struct scsi_sense_hdr sshdr;
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static const char temp[] = "temporary ";
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int len;
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if (sdp->type != TYPE_DISK && sdp->type != TYPE_ZBC)
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/* no cache control on RBC devices; theoretically they
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* can do it, but there's probably so many exceptions
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* it's not worth the risk */
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return -EINVAL;
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if (strncmp(buf, temp, sizeof(temp) - 1) == 0) {
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buf += sizeof(temp) - 1;
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sdkp->cache_override = 1;
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} else {
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sdkp->cache_override = 0;
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}
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ct = sysfs_match_string(sd_cache_types, buf);
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if (ct < 0)
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return -EINVAL;
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rcd = ct & 0x01 ? 1 : 0;
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wce = (ct & 0x02) && !sdkp->write_prot ? 1 : 0;
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if (sdkp->cache_override) {
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sdkp->WCE = wce;
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sdkp->RCD = rcd;
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sd_set_flush_flag(sdkp);
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return count;
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}
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if (scsi_mode_sense(sdp, 0x08, 8, buffer, sizeof(buffer), SD_TIMEOUT,
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sdkp->max_retries, &data, NULL))
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return -EINVAL;
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len = min_t(size_t, sizeof(buffer), data.length - data.header_length -
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data.block_descriptor_length);
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buffer_data = buffer + data.header_length +
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data.block_descriptor_length;
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buffer_data[2] &= ~0x05;
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buffer_data[2] |= wce << 2 | rcd;
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sp = buffer_data[0] & 0x80 ? 1 : 0;
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buffer_data[0] &= ~0x80;
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/*
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* Ensure WP, DPOFUA, and RESERVED fields are cleared in
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* received mode parameter buffer before doing MODE SELECT.
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*/
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data.device_specific = 0;
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if (scsi_mode_select(sdp, 1, sp, 8, buffer_data, len, SD_TIMEOUT,
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sdkp->max_retries, &data, &sshdr)) {
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if (scsi_sense_valid(&sshdr))
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sd_print_sense_hdr(sdkp, &sshdr);
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return -EINVAL;
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}
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sd_revalidate_disk(sdkp->disk);
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return count;
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}
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static ssize_t
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manage_start_stop_show(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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struct scsi_disk *sdkp = to_scsi_disk(dev);
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struct scsi_device *sdp = sdkp->device;
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return sprintf(buf, "%u\n", sdp->manage_start_stop);
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}
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static ssize_t
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manage_start_stop_store(struct device *dev, struct device_attribute *attr,
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const char *buf, size_t count)
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{
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struct scsi_disk *sdkp = to_scsi_disk(dev);
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struct scsi_device *sdp = sdkp->device;
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bool v;
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if (!capable(CAP_SYS_ADMIN))
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return -EACCES;
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if (kstrtobool(buf, &v))
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return -EINVAL;
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sdp->manage_start_stop = v;
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return count;
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}
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static DEVICE_ATTR_RW(manage_start_stop);
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static ssize_t
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allow_restart_show(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct scsi_disk *sdkp = to_scsi_disk(dev);
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return sprintf(buf, "%u\n", sdkp->device->allow_restart);
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}
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static ssize_t
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allow_restart_store(struct device *dev, struct device_attribute *attr,
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const char *buf, size_t count)
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{
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bool v;
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struct scsi_disk *sdkp = to_scsi_disk(dev);
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struct scsi_device *sdp = sdkp->device;
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if (!capable(CAP_SYS_ADMIN))
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return -EACCES;
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if (sdp->type != TYPE_DISK && sdp->type != TYPE_ZBC)
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return -EINVAL;
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if (kstrtobool(buf, &v))
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return -EINVAL;
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sdp->allow_restart = v;
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return count;
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}
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static DEVICE_ATTR_RW(allow_restart);
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static ssize_t
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cache_type_show(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct scsi_disk *sdkp = to_scsi_disk(dev);
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int ct = sdkp->RCD + 2*sdkp->WCE;
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return sprintf(buf, "%s\n", sd_cache_types[ct]);
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}
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static DEVICE_ATTR_RW(cache_type);
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static ssize_t
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FUA_show(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct scsi_disk *sdkp = to_scsi_disk(dev);
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return sprintf(buf, "%u\n", sdkp->DPOFUA);
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}
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static DEVICE_ATTR_RO(FUA);
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static ssize_t
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protection_type_show(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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struct scsi_disk *sdkp = to_scsi_disk(dev);
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return sprintf(buf, "%u\n", sdkp->protection_type);
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}
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static ssize_t
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protection_type_store(struct device *dev, struct device_attribute *attr,
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const char *buf, size_t count)
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{
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struct scsi_disk *sdkp = to_scsi_disk(dev);
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unsigned int val;
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int err;
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if (!capable(CAP_SYS_ADMIN))
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return -EACCES;
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err = kstrtouint(buf, 10, &val);
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if (err)
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return err;
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if (val <= T10_PI_TYPE3_PROTECTION)
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sdkp->protection_type = val;
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return count;
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}
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static DEVICE_ATTR_RW(protection_type);
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static ssize_t
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protection_mode_show(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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struct scsi_disk *sdkp = to_scsi_disk(dev);
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struct scsi_device *sdp = sdkp->device;
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unsigned int dif, dix;
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dif = scsi_host_dif_capable(sdp->host, sdkp->protection_type);
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dix = scsi_host_dix_capable(sdp->host, sdkp->protection_type);
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if (!dix && scsi_host_dix_capable(sdp->host, T10_PI_TYPE0_PROTECTION)) {
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dif = 0;
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dix = 1;
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}
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if (!dif && !dix)
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return sprintf(buf, "none\n");
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return sprintf(buf, "%s%u\n", dix ? "dix" : "dif", dif);
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}
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static DEVICE_ATTR_RO(protection_mode);
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static ssize_t
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app_tag_own_show(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct scsi_disk *sdkp = to_scsi_disk(dev);
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return sprintf(buf, "%u\n", sdkp->ATO);
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}
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static DEVICE_ATTR_RO(app_tag_own);
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static ssize_t
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thin_provisioning_show(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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struct scsi_disk *sdkp = to_scsi_disk(dev);
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return sprintf(buf, "%u\n", sdkp->lbpme);
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}
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static DEVICE_ATTR_RO(thin_provisioning);
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/* sysfs_match_string() requires dense arrays */
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static const char *lbp_mode[] = {
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[SD_LBP_FULL] = "full",
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[SD_LBP_UNMAP] = "unmap",
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[SD_LBP_WS16] = "writesame_16",
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[SD_LBP_WS10] = "writesame_10",
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[SD_LBP_ZERO] = "writesame_zero",
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[SD_LBP_DISABLE] = "disabled",
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};
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static ssize_t
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provisioning_mode_show(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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struct scsi_disk *sdkp = to_scsi_disk(dev);
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return sprintf(buf, "%s\n", lbp_mode[sdkp->provisioning_mode]);
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}
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static ssize_t
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provisioning_mode_store(struct device *dev, struct device_attribute *attr,
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const char *buf, size_t count)
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{
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struct scsi_disk *sdkp = to_scsi_disk(dev);
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struct scsi_device *sdp = sdkp->device;
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int mode;
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if (!capable(CAP_SYS_ADMIN))
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return -EACCES;
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if (sd_is_zoned(sdkp)) {
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sd_config_discard(sdkp, SD_LBP_DISABLE);
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return count;
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}
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if (sdp->type != TYPE_DISK)
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return -EINVAL;
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mode = sysfs_match_string(lbp_mode, buf);
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if (mode < 0)
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return -EINVAL;
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sd_config_discard(sdkp, mode);
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return count;
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}
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static DEVICE_ATTR_RW(provisioning_mode);
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/* sysfs_match_string() requires dense arrays */
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static const char *zeroing_mode[] = {
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[SD_ZERO_WRITE] = "write",
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[SD_ZERO_WS] = "writesame",
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[SD_ZERO_WS16_UNMAP] = "writesame_16_unmap",
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[SD_ZERO_WS10_UNMAP] = "writesame_10_unmap",
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};
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static ssize_t
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zeroing_mode_show(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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struct scsi_disk *sdkp = to_scsi_disk(dev);
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return sprintf(buf, "%s\n", zeroing_mode[sdkp->zeroing_mode]);
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}
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static ssize_t
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zeroing_mode_store(struct device *dev, struct device_attribute *attr,
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const char *buf, size_t count)
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{
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struct scsi_disk *sdkp = to_scsi_disk(dev);
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int mode;
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|
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if (!capable(CAP_SYS_ADMIN))
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return -EACCES;
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|
|
mode = sysfs_match_string(zeroing_mode, buf);
|
|
if (mode < 0)
|
|
return -EINVAL;
|
|
|
|
sdkp->zeroing_mode = mode;
|
|
|
|
return count;
|
|
}
|
|
static DEVICE_ATTR_RW(zeroing_mode);
|
|
|
|
static ssize_t
|
|
max_medium_access_timeouts_show(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct scsi_disk *sdkp = to_scsi_disk(dev);
|
|
|
|
return sprintf(buf, "%u\n", sdkp->max_medium_access_timeouts);
|
|
}
|
|
|
|
static ssize_t
|
|
max_medium_access_timeouts_store(struct device *dev,
|
|
struct device_attribute *attr, const char *buf,
|
|
size_t count)
|
|
{
|
|
struct scsi_disk *sdkp = to_scsi_disk(dev);
|
|
int err;
|
|
|
|
if (!capable(CAP_SYS_ADMIN))
|
|
return -EACCES;
|
|
|
|
err = kstrtouint(buf, 10, &sdkp->max_medium_access_timeouts);
|
|
|
|
return err ? err : count;
|
|
}
|
|
static DEVICE_ATTR_RW(max_medium_access_timeouts);
|
|
|
|
static ssize_t
|
|
max_write_same_blocks_show(struct device *dev, struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct scsi_disk *sdkp = to_scsi_disk(dev);
|
|
|
|
return sprintf(buf, "%u\n", sdkp->max_ws_blocks);
|
|
}
|
|
|
|
static ssize_t
|
|
max_write_same_blocks_store(struct device *dev, struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct scsi_disk *sdkp = to_scsi_disk(dev);
|
|
struct scsi_device *sdp = sdkp->device;
|
|
unsigned long max;
|
|
int err;
|
|
|
|
if (!capable(CAP_SYS_ADMIN))
|
|
return -EACCES;
|
|
|
|
if (sdp->type != TYPE_DISK && sdp->type != TYPE_ZBC)
|
|
return -EINVAL;
|
|
|
|
err = kstrtoul(buf, 10, &max);
|
|
|
|
if (err)
|
|
return err;
|
|
|
|
if (max == 0)
|
|
sdp->no_write_same = 1;
|
|
else if (max <= SD_MAX_WS16_BLOCKS) {
|
|
sdp->no_write_same = 0;
|
|
sdkp->max_ws_blocks = max;
|
|
}
|
|
|
|
sd_config_write_same(sdkp);
|
|
|
|
return count;
|
|
}
|
|
static DEVICE_ATTR_RW(max_write_same_blocks);
|
|
|
|
static ssize_t
|
|
zoned_cap_show(struct device *dev, struct device_attribute *attr, char *buf)
|
|
{
|
|
struct scsi_disk *sdkp = to_scsi_disk(dev);
|
|
|
|
if (sdkp->device->type == TYPE_ZBC)
|
|
return sprintf(buf, "host-managed\n");
|
|
if (sdkp->zoned == 1)
|
|
return sprintf(buf, "host-aware\n");
|
|
if (sdkp->zoned == 2)
|
|
return sprintf(buf, "drive-managed\n");
|
|
return sprintf(buf, "none\n");
|
|
}
|
|
static DEVICE_ATTR_RO(zoned_cap);
|
|
|
|
static ssize_t
|
|
max_retries_store(struct device *dev, struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct scsi_disk *sdkp = to_scsi_disk(dev);
|
|
struct scsi_device *sdev = sdkp->device;
|
|
int retries, err;
|
|
|
|
err = kstrtoint(buf, 10, &retries);
|
|
if (err)
|
|
return err;
|
|
|
|
if (retries == SCSI_CMD_RETRIES_NO_LIMIT || retries <= SD_MAX_RETRIES) {
|
|
sdkp->max_retries = retries;
|
|
return count;
|
|
}
|
|
|
|
sdev_printk(KERN_ERR, sdev, "max_retries must be between -1 and %d\n",
|
|
SD_MAX_RETRIES);
|
|
return -EINVAL;
|
|
}
|
|
|
|
static ssize_t
|
|
max_retries_show(struct device *dev, struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct scsi_disk *sdkp = to_scsi_disk(dev);
|
|
|
|
return sprintf(buf, "%d\n", sdkp->max_retries);
|
|
}
|
|
|
|
static DEVICE_ATTR_RW(max_retries);
|
|
|
|
static struct attribute *sd_disk_attrs[] = {
|
|
&dev_attr_cache_type.attr,
|
|
&dev_attr_FUA.attr,
|
|
&dev_attr_allow_restart.attr,
|
|
&dev_attr_manage_start_stop.attr,
|
|
&dev_attr_protection_type.attr,
|
|
&dev_attr_protection_mode.attr,
|
|
&dev_attr_app_tag_own.attr,
|
|
&dev_attr_thin_provisioning.attr,
|
|
&dev_attr_provisioning_mode.attr,
|
|
&dev_attr_zeroing_mode.attr,
|
|
&dev_attr_max_write_same_blocks.attr,
|
|
&dev_attr_max_medium_access_timeouts.attr,
|
|
&dev_attr_zoned_cap.attr,
|
|
&dev_attr_max_retries.attr,
|
|
NULL,
|
|
};
|
|
ATTRIBUTE_GROUPS(sd_disk);
|
|
|
|
static struct class sd_disk_class = {
|
|
.name = "scsi_disk",
|
|
.owner = THIS_MODULE,
|
|
.dev_release = scsi_disk_release,
|
|
.dev_groups = sd_disk_groups,
|
|
};
|
|
|
|
static const struct dev_pm_ops sd_pm_ops = {
|
|
.suspend = sd_suspend_system,
|
|
.resume = sd_resume,
|
|
.poweroff = sd_suspend_system,
|
|
.restore = sd_resume,
|
|
.runtime_suspend = sd_suspend_runtime,
|
|
.runtime_resume = sd_resume,
|
|
};
|
|
|
|
static struct scsi_driver sd_template = {
|
|
.gendrv = {
|
|
.name = "sd",
|
|
.owner = THIS_MODULE,
|
|
.probe = sd_probe,
|
|
.probe_type = PROBE_PREFER_ASYNCHRONOUS,
|
|
.remove = sd_remove,
|
|
.shutdown = sd_shutdown,
|
|
.pm = &sd_pm_ops,
|
|
},
|
|
.rescan = sd_rescan,
|
|
.init_command = sd_init_command,
|
|
.uninit_command = sd_uninit_command,
|
|
.done = sd_done,
|
|
.eh_action = sd_eh_action,
|
|
.eh_reset = sd_eh_reset,
|
|
};
|
|
|
|
/*
|
|
* Don't request a new module, as that could deadlock in multipath
|
|
* environment.
|
|
*/
|
|
static void sd_default_probe(dev_t devt)
|
|
{
|
|
}
|
|
|
|
/*
|
|
* Device no to disk mapping:
|
|
*
|
|
* major disc2 disc p1
|
|
* |............|.............|....|....| <- dev_t
|
|
* 31 20 19 8 7 4 3 0
|
|
*
|
|
* Inside a major, we have 16k disks, however mapped non-
|
|
* contiguously. The first 16 disks are for major0, the next
|
|
* ones with major1, ... Disk 256 is for major0 again, disk 272
|
|
* for major1, ...
|
|
* As we stay compatible with our numbering scheme, we can reuse
|
|
* the well-know SCSI majors 8, 65--71, 136--143.
|
|
*/
|
|
static int sd_major(int major_idx)
|
|
{
|
|
switch (major_idx) {
|
|
case 0:
|
|
return SCSI_DISK0_MAJOR;
|
|
case 1 ... 7:
|
|
return SCSI_DISK1_MAJOR + major_idx - 1;
|
|
case 8 ... 15:
|
|
return SCSI_DISK8_MAJOR + major_idx - 8;
|
|
default:
|
|
BUG();
|
|
return 0; /* shut up gcc */
|
|
}
|
|
}
|
|
|
|
static struct scsi_disk *scsi_disk_get(struct gendisk *disk)
|
|
{
|
|
struct scsi_disk *sdkp = NULL;
|
|
|
|
mutex_lock(&sd_ref_mutex);
|
|
|
|
if (disk->private_data) {
|
|
sdkp = scsi_disk(disk);
|
|
if (scsi_device_get(sdkp->device) == 0)
|
|
get_device(&sdkp->dev);
|
|
else
|
|
sdkp = NULL;
|
|
}
|
|
mutex_unlock(&sd_ref_mutex);
|
|
return sdkp;
|
|
}
|
|
|
|
static void scsi_disk_put(struct scsi_disk *sdkp)
|
|
{
|
|
struct scsi_device *sdev = sdkp->device;
|
|
|
|
mutex_lock(&sd_ref_mutex);
|
|
put_device(&sdkp->dev);
|
|
scsi_device_put(sdev);
|
|
mutex_unlock(&sd_ref_mutex);
|
|
}
|
|
|
|
#ifdef CONFIG_BLK_SED_OPAL
|
|
static int sd_sec_submit(void *data, u16 spsp, u8 secp, void *buffer,
|
|
size_t len, bool send)
|
|
{
|
|
struct scsi_disk *sdkp = data;
|
|
struct scsi_device *sdev = sdkp->device;
|
|
u8 cdb[12] = { 0, };
|
|
int ret;
|
|
|
|
cdb[0] = send ? SECURITY_PROTOCOL_OUT : SECURITY_PROTOCOL_IN;
|
|
cdb[1] = secp;
|
|
put_unaligned_be16(spsp, &cdb[2]);
|
|
put_unaligned_be32(len, &cdb[6]);
|
|
|
|
ret = scsi_execute(sdev, cdb, send ? DMA_TO_DEVICE : DMA_FROM_DEVICE,
|
|
buffer, len, NULL, NULL, SD_TIMEOUT, sdkp->max_retries, 0,
|
|
RQF_PM, NULL);
|
|
return ret <= 0 ? ret : -EIO;
|
|
}
|
|
#endif /* CONFIG_BLK_SED_OPAL */
|
|
|
|
/*
|
|
* Look up the DIX operation based on whether the command is read or
|
|
* write and whether dix and dif are enabled.
|
|
*/
|
|
static unsigned int sd_prot_op(bool write, bool dix, bool dif)
|
|
{
|
|
/* Lookup table: bit 2 (write), bit 1 (dix), bit 0 (dif) */
|
|
static const unsigned int ops[] = { /* wrt dix dif */
|
|
SCSI_PROT_NORMAL, /* 0 0 0 */
|
|
SCSI_PROT_READ_STRIP, /* 0 0 1 */
|
|
SCSI_PROT_READ_INSERT, /* 0 1 0 */
|
|
SCSI_PROT_READ_PASS, /* 0 1 1 */
|
|
SCSI_PROT_NORMAL, /* 1 0 0 */
|
|
SCSI_PROT_WRITE_INSERT, /* 1 0 1 */
|
|
SCSI_PROT_WRITE_STRIP, /* 1 1 0 */
|
|
SCSI_PROT_WRITE_PASS, /* 1 1 1 */
|
|
};
|
|
|
|
return ops[write << 2 | dix << 1 | dif];
|
|
}
|
|
|
|
/*
|
|
* Returns a mask of the protection flags that are valid for a given DIX
|
|
* operation.
|
|
*/
|
|
static unsigned int sd_prot_flag_mask(unsigned int prot_op)
|
|
{
|
|
static const unsigned int flag_mask[] = {
|
|
[SCSI_PROT_NORMAL] = 0,
|
|
|
|
[SCSI_PROT_READ_STRIP] = SCSI_PROT_TRANSFER_PI |
|
|
SCSI_PROT_GUARD_CHECK |
|
|
SCSI_PROT_REF_CHECK |
|
|
SCSI_PROT_REF_INCREMENT,
|
|
|
|
[SCSI_PROT_READ_INSERT] = SCSI_PROT_REF_INCREMENT |
|
|
SCSI_PROT_IP_CHECKSUM,
|
|
|
|
[SCSI_PROT_READ_PASS] = SCSI_PROT_TRANSFER_PI |
|
|
SCSI_PROT_GUARD_CHECK |
|
|
SCSI_PROT_REF_CHECK |
|
|
SCSI_PROT_REF_INCREMENT |
|
|
SCSI_PROT_IP_CHECKSUM,
|
|
|
|
[SCSI_PROT_WRITE_INSERT] = SCSI_PROT_TRANSFER_PI |
|
|
SCSI_PROT_REF_INCREMENT,
|
|
|
|
[SCSI_PROT_WRITE_STRIP] = SCSI_PROT_GUARD_CHECK |
|
|
SCSI_PROT_REF_CHECK |
|
|
SCSI_PROT_REF_INCREMENT |
|
|
SCSI_PROT_IP_CHECKSUM,
|
|
|
|
[SCSI_PROT_WRITE_PASS] = SCSI_PROT_TRANSFER_PI |
|
|
SCSI_PROT_GUARD_CHECK |
|
|
SCSI_PROT_REF_CHECK |
|
|
SCSI_PROT_REF_INCREMENT |
|
|
SCSI_PROT_IP_CHECKSUM,
|
|
};
|
|
|
|
return flag_mask[prot_op];
|
|
}
|
|
|
|
static unsigned char sd_setup_protect_cmnd(struct scsi_cmnd *scmd,
|
|
unsigned int dix, unsigned int dif)
|
|
{
|
|
struct bio *bio = scmd->request->bio;
|
|
unsigned int prot_op = sd_prot_op(rq_data_dir(scmd->request), dix, dif);
|
|
unsigned int protect = 0;
|
|
|
|
if (dix) { /* DIX Type 0, 1, 2, 3 */
|
|
if (bio_integrity_flagged(bio, BIP_IP_CHECKSUM))
|
|
scmd->prot_flags |= SCSI_PROT_IP_CHECKSUM;
|
|
|
|
if (bio_integrity_flagged(bio, BIP_CTRL_NOCHECK) == false)
|
|
scmd->prot_flags |= SCSI_PROT_GUARD_CHECK;
|
|
}
|
|
|
|
if (dif != T10_PI_TYPE3_PROTECTION) { /* DIX/DIF Type 0, 1, 2 */
|
|
scmd->prot_flags |= SCSI_PROT_REF_INCREMENT;
|
|
|
|
if (bio_integrity_flagged(bio, BIP_CTRL_NOCHECK) == false)
|
|
scmd->prot_flags |= SCSI_PROT_REF_CHECK;
|
|
}
|
|
|
|
if (dif) { /* DIX/DIF Type 1, 2, 3 */
|
|
scmd->prot_flags |= SCSI_PROT_TRANSFER_PI;
|
|
|
|
if (bio_integrity_flagged(bio, BIP_DISK_NOCHECK))
|
|
protect = 3 << 5; /* Disable target PI checking */
|
|
else
|
|
protect = 1 << 5; /* Enable target PI checking */
|
|
}
|
|
|
|
scsi_set_prot_op(scmd, prot_op);
|
|
scsi_set_prot_type(scmd, dif);
|
|
scmd->prot_flags &= sd_prot_flag_mask(prot_op);
|
|
|
|
return protect;
|
|
}
|
|
|
|
static void sd_config_discard(struct scsi_disk *sdkp, unsigned int mode)
|
|
{
|
|
struct request_queue *q = sdkp->disk->queue;
|
|
unsigned int logical_block_size = sdkp->device->sector_size;
|
|
unsigned int max_blocks = 0;
|
|
|
|
q->limits.discard_alignment =
|
|
sdkp->unmap_alignment * logical_block_size;
|
|
q->limits.discard_granularity =
|
|
max(sdkp->physical_block_size,
|
|
sdkp->unmap_granularity * logical_block_size);
|
|
sdkp->provisioning_mode = mode;
|
|
|
|
switch (mode) {
|
|
|
|
case SD_LBP_FULL:
|
|
case SD_LBP_DISABLE:
|
|
blk_queue_max_discard_sectors(q, 0);
|
|
blk_queue_flag_clear(QUEUE_FLAG_DISCARD, q);
|
|
return;
|
|
|
|
case SD_LBP_UNMAP:
|
|
max_blocks = min_not_zero(sdkp->max_unmap_blocks,
|
|
(u32)SD_MAX_WS16_BLOCKS);
|
|
break;
|
|
|
|
case SD_LBP_WS16:
|
|
if (sdkp->device->unmap_limit_for_ws)
|
|
max_blocks = sdkp->max_unmap_blocks;
|
|
else
|
|
max_blocks = sdkp->max_ws_blocks;
|
|
|
|
max_blocks = min_not_zero(max_blocks, (u32)SD_MAX_WS16_BLOCKS);
|
|
break;
|
|
|
|
case SD_LBP_WS10:
|
|
if (sdkp->device->unmap_limit_for_ws)
|
|
max_blocks = sdkp->max_unmap_blocks;
|
|
else
|
|
max_blocks = sdkp->max_ws_blocks;
|
|
|
|
max_blocks = min_not_zero(max_blocks, (u32)SD_MAX_WS10_BLOCKS);
|
|
break;
|
|
|
|
case SD_LBP_ZERO:
|
|
max_blocks = min_not_zero(sdkp->max_ws_blocks,
|
|
(u32)SD_MAX_WS10_BLOCKS);
|
|
break;
|
|
}
|
|
|
|
blk_queue_max_discard_sectors(q, max_blocks * (logical_block_size >> 9));
|
|
blk_queue_flag_set(QUEUE_FLAG_DISCARD, q);
|
|
}
|
|
|
|
static blk_status_t sd_setup_unmap_cmnd(struct scsi_cmnd *cmd)
|
|
{
|
|
struct scsi_device *sdp = cmd->device;
|
|
struct request *rq = cmd->request;
|
|
struct scsi_disk *sdkp = scsi_disk(rq->rq_disk);
|
|
u64 lba = sectors_to_logical(sdp, blk_rq_pos(rq));
|
|
u32 nr_blocks = sectors_to_logical(sdp, blk_rq_sectors(rq));
|
|
unsigned int data_len = 24;
|
|
char *buf;
|
|
|
|
rq->special_vec.bv_page = mempool_alloc(sd_page_pool, GFP_ATOMIC);
|
|
if (!rq->special_vec.bv_page)
|
|
return BLK_STS_RESOURCE;
|
|
clear_highpage(rq->special_vec.bv_page);
|
|
rq->special_vec.bv_offset = 0;
|
|
rq->special_vec.bv_len = data_len;
|
|
rq->rq_flags |= RQF_SPECIAL_PAYLOAD;
|
|
|
|
cmd->cmd_len = 10;
|
|
cmd->cmnd[0] = UNMAP;
|
|
cmd->cmnd[8] = 24;
|
|
|
|
buf = page_address(rq->special_vec.bv_page);
|
|
put_unaligned_be16(6 + 16, &buf[0]);
|
|
put_unaligned_be16(16, &buf[2]);
|
|
put_unaligned_be64(lba, &buf[8]);
|
|
put_unaligned_be32(nr_blocks, &buf[16]);
|
|
|
|
cmd->allowed = sdkp->max_retries;
|
|
cmd->transfersize = data_len;
|
|
rq->timeout = SD_TIMEOUT;
|
|
|
|
return scsi_alloc_sgtables(cmd);
|
|
}
|
|
|
|
static blk_status_t sd_setup_write_same16_cmnd(struct scsi_cmnd *cmd,
|
|
bool unmap)
|
|
{
|
|
struct scsi_device *sdp = cmd->device;
|
|
struct request *rq = cmd->request;
|
|
struct scsi_disk *sdkp = scsi_disk(rq->rq_disk);
|
|
u64 lba = sectors_to_logical(sdp, blk_rq_pos(rq));
|
|
u32 nr_blocks = sectors_to_logical(sdp, blk_rq_sectors(rq));
|
|
u32 data_len = sdp->sector_size;
|
|
|
|
rq->special_vec.bv_page = mempool_alloc(sd_page_pool, GFP_ATOMIC);
|
|
if (!rq->special_vec.bv_page)
|
|
return BLK_STS_RESOURCE;
|
|
clear_highpage(rq->special_vec.bv_page);
|
|
rq->special_vec.bv_offset = 0;
|
|
rq->special_vec.bv_len = data_len;
|
|
rq->rq_flags |= RQF_SPECIAL_PAYLOAD;
|
|
|
|
cmd->cmd_len = 16;
|
|
cmd->cmnd[0] = WRITE_SAME_16;
|
|
if (unmap)
|
|
cmd->cmnd[1] = 0x8; /* UNMAP */
|
|
put_unaligned_be64(lba, &cmd->cmnd[2]);
|
|
put_unaligned_be32(nr_blocks, &cmd->cmnd[10]);
|
|
|
|
cmd->allowed = sdkp->max_retries;
|
|
cmd->transfersize = data_len;
|
|
rq->timeout = unmap ? SD_TIMEOUT : SD_WRITE_SAME_TIMEOUT;
|
|
|
|
return scsi_alloc_sgtables(cmd);
|
|
}
|
|
|
|
static blk_status_t sd_setup_write_same10_cmnd(struct scsi_cmnd *cmd,
|
|
bool unmap)
|
|
{
|
|
struct scsi_device *sdp = cmd->device;
|
|
struct request *rq = cmd->request;
|
|
struct scsi_disk *sdkp = scsi_disk(rq->rq_disk);
|
|
u64 lba = sectors_to_logical(sdp, blk_rq_pos(rq));
|
|
u32 nr_blocks = sectors_to_logical(sdp, blk_rq_sectors(rq));
|
|
u32 data_len = sdp->sector_size;
|
|
|
|
rq->special_vec.bv_page = mempool_alloc(sd_page_pool, GFP_ATOMIC);
|
|
if (!rq->special_vec.bv_page)
|
|
return BLK_STS_RESOURCE;
|
|
clear_highpage(rq->special_vec.bv_page);
|
|
rq->special_vec.bv_offset = 0;
|
|
rq->special_vec.bv_len = data_len;
|
|
rq->rq_flags |= RQF_SPECIAL_PAYLOAD;
|
|
|
|
cmd->cmd_len = 10;
|
|
cmd->cmnd[0] = WRITE_SAME;
|
|
if (unmap)
|
|
cmd->cmnd[1] = 0x8; /* UNMAP */
|
|
put_unaligned_be32(lba, &cmd->cmnd[2]);
|
|
put_unaligned_be16(nr_blocks, &cmd->cmnd[7]);
|
|
|
|
cmd->allowed = sdkp->max_retries;
|
|
cmd->transfersize = data_len;
|
|
rq->timeout = unmap ? SD_TIMEOUT : SD_WRITE_SAME_TIMEOUT;
|
|
|
|
return scsi_alloc_sgtables(cmd);
|
|
}
|
|
|
|
static blk_status_t sd_setup_write_zeroes_cmnd(struct scsi_cmnd *cmd)
|
|
{
|
|
struct request *rq = cmd->request;
|
|
struct scsi_device *sdp = cmd->device;
|
|
struct scsi_disk *sdkp = scsi_disk(rq->rq_disk);
|
|
u64 lba = sectors_to_logical(sdp, blk_rq_pos(rq));
|
|
u32 nr_blocks = sectors_to_logical(sdp, blk_rq_sectors(rq));
|
|
|
|
if (!(rq->cmd_flags & REQ_NOUNMAP)) {
|
|
switch (sdkp->zeroing_mode) {
|
|
case SD_ZERO_WS16_UNMAP:
|
|
return sd_setup_write_same16_cmnd(cmd, true);
|
|
case SD_ZERO_WS10_UNMAP:
|
|
return sd_setup_write_same10_cmnd(cmd, true);
|
|
}
|
|
}
|
|
|
|
if (sdp->no_write_same) {
|
|
rq->rq_flags |= RQF_QUIET;
|
|
return BLK_STS_TARGET;
|
|
}
|
|
|
|
if (sdkp->ws16 || lba > 0xffffffff || nr_blocks > 0xffff)
|
|
return sd_setup_write_same16_cmnd(cmd, false);
|
|
|
|
return sd_setup_write_same10_cmnd(cmd, false);
|
|
}
|
|
|
|
static void sd_config_write_same(struct scsi_disk *sdkp)
|
|
{
|
|
struct request_queue *q = sdkp->disk->queue;
|
|
unsigned int logical_block_size = sdkp->device->sector_size;
|
|
|
|
if (sdkp->device->no_write_same) {
|
|
sdkp->max_ws_blocks = 0;
|
|
goto out;
|
|
}
|
|
|
|
/* Some devices can not handle block counts above 0xffff despite
|
|
* supporting WRITE SAME(16). Consequently we default to 64k
|
|
* blocks per I/O unless the device explicitly advertises a
|
|
* bigger limit.
|
|
*/
|
|
if (sdkp->max_ws_blocks > SD_MAX_WS10_BLOCKS)
|
|
sdkp->max_ws_blocks = min_not_zero(sdkp->max_ws_blocks,
|
|
(u32)SD_MAX_WS16_BLOCKS);
|
|
else if (sdkp->ws16 || sdkp->ws10 || sdkp->device->no_report_opcodes)
|
|
sdkp->max_ws_blocks = min_not_zero(sdkp->max_ws_blocks,
|
|
(u32)SD_MAX_WS10_BLOCKS);
|
|
else {
|
|
sdkp->device->no_write_same = 1;
|
|
sdkp->max_ws_blocks = 0;
|
|
}
|
|
|
|
if (sdkp->lbprz && sdkp->lbpws)
|
|
sdkp->zeroing_mode = SD_ZERO_WS16_UNMAP;
|
|
else if (sdkp->lbprz && sdkp->lbpws10)
|
|
sdkp->zeroing_mode = SD_ZERO_WS10_UNMAP;
|
|
else if (sdkp->max_ws_blocks)
|
|
sdkp->zeroing_mode = SD_ZERO_WS;
|
|
else
|
|
sdkp->zeroing_mode = SD_ZERO_WRITE;
|
|
|
|
if (sdkp->max_ws_blocks &&
|
|
sdkp->physical_block_size > logical_block_size) {
|
|
/*
|
|
* Reporting a maximum number of blocks that is not aligned
|
|
* on the device physical size would cause a large write same
|
|
* request to be split into physically unaligned chunks by
|
|
* __blkdev_issue_write_zeroes() and __blkdev_issue_write_same()
|
|
* even if the caller of these functions took care to align the
|
|
* large request. So make sure the maximum reported is aligned
|
|
* to the device physical block size. This is only an optional
|
|
* optimization for regular disks, but this is mandatory to
|
|
* avoid failure of large write same requests directed at
|
|
* sequential write required zones of host-managed ZBC disks.
|
|
*/
|
|
sdkp->max_ws_blocks =
|
|
round_down(sdkp->max_ws_blocks,
|
|
bytes_to_logical(sdkp->device,
|
|
sdkp->physical_block_size));
|
|
}
|
|
|
|
out:
|
|
blk_queue_max_write_same_sectors(q, sdkp->max_ws_blocks *
|
|
(logical_block_size >> 9));
|
|
blk_queue_max_write_zeroes_sectors(q, sdkp->max_ws_blocks *
|
|
(logical_block_size >> 9));
|
|
}
|
|
|
|
/**
|
|
* sd_setup_write_same_cmnd - write the same data to multiple blocks
|
|
* @cmd: command to prepare
|
|
*
|
|
* Will set up either WRITE SAME(10) or WRITE SAME(16) depending on
|
|
* the preference indicated by the target device.
|
|
**/
|
|
static blk_status_t sd_setup_write_same_cmnd(struct scsi_cmnd *cmd)
|
|
{
|
|
struct request *rq = cmd->request;
|
|
struct scsi_device *sdp = cmd->device;
|
|
struct scsi_disk *sdkp = scsi_disk(rq->rq_disk);
|
|
struct bio *bio = rq->bio;
|
|
u64 lba = sectors_to_logical(sdp, blk_rq_pos(rq));
|
|
u32 nr_blocks = sectors_to_logical(sdp, blk_rq_sectors(rq));
|
|
blk_status_t ret;
|
|
|
|
if (sdkp->device->no_write_same)
|
|
return BLK_STS_TARGET;
|
|
|
|
BUG_ON(bio_offset(bio) || bio_iovec(bio).bv_len != sdp->sector_size);
|
|
|
|
rq->timeout = SD_WRITE_SAME_TIMEOUT;
|
|
|
|
if (sdkp->ws16 || lba > 0xffffffff || nr_blocks > 0xffff) {
|
|
cmd->cmd_len = 16;
|
|
cmd->cmnd[0] = WRITE_SAME_16;
|
|
put_unaligned_be64(lba, &cmd->cmnd[2]);
|
|
put_unaligned_be32(nr_blocks, &cmd->cmnd[10]);
|
|
} else {
|
|
cmd->cmd_len = 10;
|
|
cmd->cmnd[0] = WRITE_SAME;
|
|
put_unaligned_be32(lba, &cmd->cmnd[2]);
|
|
put_unaligned_be16(nr_blocks, &cmd->cmnd[7]);
|
|
}
|
|
|
|
cmd->transfersize = sdp->sector_size;
|
|
cmd->allowed = sdkp->max_retries;
|
|
|
|
/*
|
|
* For WRITE SAME the data transferred via the DATA OUT buffer is
|
|
* different from the amount of data actually written to the target.
|
|
*
|
|
* We set up __data_len to the amount of data transferred via the
|
|
* DATA OUT buffer so that blk_rq_map_sg sets up the proper S/G list
|
|
* to transfer a single sector of data first, but then reset it to
|
|
* the amount of data to be written right after so that the I/O path
|
|
* knows how much to actually write.
|
|
*/
|
|
rq->__data_len = sdp->sector_size;
|
|
ret = scsi_alloc_sgtables(cmd);
|
|
rq->__data_len = blk_rq_bytes(rq);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static blk_status_t sd_setup_flush_cmnd(struct scsi_cmnd *cmd)
|
|
{
|
|
struct request *rq = cmd->request;
|
|
struct scsi_disk *sdkp = scsi_disk(rq->rq_disk);
|
|
|
|
/* flush requests don't perform I/O, zero the S/G table */
|
|
memset(&cmd->sdb, 0, sizeof(cmd->sdb));
|
|
|
|
cmd->cmnd[0] = SYNCHRONIZE_CACHE;
|
|
cmd->cmd_len = 10;
|
|
cmd->transfersize = 0;
|
|
cmd->allowed = sdkp->max_retries;
|
|
|
|
rq->timeout = rq->q->rq_timeout * SD_FLUSH_TIMEOUT_MULTIPLIER;
|
|
return BLK_STS_OK;
|
|
}
|
|
|
|
static blk_status_t sd_setup_rw32_cmnd(struct scsi_cmnd *cmd, bool write,
|
|
sector_t lba, unsigned int nr_blocks,
|
|
unsigned char flags)
|
|
{
|
|
cmd->cmnd = mempool_alloc(sd_cdb_pool, GFP_ATOMIC);
|
|
if (unlikely(cmd->cmnd == NULL))
|
|
return BLK_STS_RESOURCE;
|
|
|
|
cmd->cmd_len = SD_EXT_CDB_SIZE;
|
|
memset(cmd->cmnd, 0, cmd->cmd_len);
|
|
|
|
cmd->cmnd[0] = VARIABLE_LENGTH_CMD;
|
|
cmd->cmnd[7] = 0x18; /* Additional CDB len */
|
|
cmd->cmnd[9] = write ? WRITE_32 : READ_32;
|
|
cmd->cmnd[10] = flags;
|
|
put_unaligned_be64(lba, &cmd->cmnd[12]);
|
|
put_unaligned_be32(lba, &cmd->cmnd[20]); /* Expected Indirect LBA */
|
|
put_unaligned_be32(nr_blocks, &cmd->cmnd[28]);
|
|
|
|
return BLK_STS_OK;
|
|
}
|
|
|
|
static blk_status_t sd_setup_rw16_cmnd(struct scsi_cmnd *cmd, bool write,
|
|
sector_t lba, unsigned int nr_blocks,
|
|
unsigned char flags)
|
|
{
|
|
cmd->cmd_len = 16;
|
|
cmd->cmnd[0] = write ? WRITE_16 : READ_16;
|
|
cmd->cmnd[1] = flags;
|
|
cmd->cmnd[14] = 0;
|
|
cmd->cmnd[15] = 0;
|
|
put_unaligned_be64(lba, &cmd->cmnd[2]);
|
|
put_unaligned_be32(nr_blocks, &cmd->cmnd[10]);
|
|
|
|
return BLK_STS_OK;
|
|
}
|
|
|
|
static blk_status_t sd_setup_rw10_cmnd(struct scsi_cmnd *cmd, bool write,
|
|
sector_t lba, unsigned int nr_blocks,
|
|
unsigned char flags)
|
|
{
|
|
cmd->cmd_len = 10;
|
|
cmd->cmnd[0] = write ? WRITE_10 : READ_10;
|
|
cmd->cmnd[1] = flags;
|
|
cmd->cmnd[6] = 0;
|
|
cmd->cmnd[9] = 0;
|
|
put_unaligned_be32(lba, &cmd->cmnd[2]);
|
|
put_unaligned_be16(nr_blocks, &cmd->cmnd[7]);
|
|
|
|
return BLK_STS_OK;
|
|
}
|
|
|
|
static blk_status_t sd_setup_rw6_cmnd(struct scsi_cmnd *cmd, bool write,
|
|
sector_t lba, unsigned int nr_blocks,
|
|
unsigned char flags)
|
|
{
|
|
/* Avoid that 0 blocks gets translated into 256 blocks. */
|
|
if (WARN_ON_ONCE(nr_blocks == 0))
|
|
return BLK_STS_IOERR;
|
|
|
|
if (unlikely(flags & 0x8)) {
|
|
/*
|
|
* This happens only if this drive failed 10byte rw
|
|
* command with ILLEGAL_REQUEST during operation and
|
|
* thus turned off use_10_for_rw.
|
|
*/
|
|
scmd_printk(KERN_ERR, cmd, "FUA write on READ/WRITE(6) drive\n");
|
|
return BLK_STS_IOERR;
|
|
}
|
|
|
|
cmd->cmd_len = 6;
|
|
cmd->cmnd[0] = write ? WRITE_6 : READ_6;
|
|
cmd->cmnd[1] = (lba >> 16) & 0x1f;
|
|
cmd->cmnd[2] = (lba >> 8) & 0xff;
|
|
cmd->cmnd[3] = lba & 0xff;
|
|
cmd->cmnd[4] = nr_blocks;
|
|
cmd->cmnd[5] = 0;
|
|
|
|
return BLK_STS_OK;
|
|
}
|
|
|
|
static blk_status_t sd_setup_read_write_cmnd(struct scsi_cmnd *cmd)
|
|
{
|
|
struct request *rq = cmd->request;
|
|
struct scsi_device *sdp = cmd->device;
|
|
struct scsi_disk *sdkp = scsi_disk(rq->rq_disk);
|
|
sector_t lba = sectors_to_logical(sdp, blk_rq_pos(rq));
|
|
sector_t threshold;
|
|
unsigned int nr_blocks = sectors_to_logical(sdp, blk_rq_sectors(rq));
|
|
unsigned int mask = logical_to_sectors(sdp, 1) - 1;
|
|
bool write = rq_data_dir(rq) == WRITE;
|
|
unsigned char protect, fua;
|
|
blk_status_t ret;
|
|
unsigned int dif;
|
|
bool dix;
|
|
|
|
ret = scsi_alloc_sgtables(cmd);
|
|
if (ret != BLK_STS_OK)
|
|
return ret;
|
|
|
|
ret = BLK_STS_IOERR;
|
|
if (!scsi_device_online(sdp) || sdp->changed) {
|
|
scmd_printk(KERN_ERR, cmd, "device offline or changed\n");
|
|
goto fail;
|
|
}
|
|
|
|
if (blk_rq_pos(rq) + blk_rq_sectors(rq) > get_capacity(rq->rq_disk)) {
|
|
scmd_printk(KERN_ERR, cmd, "access beyond end of device\n");
|
|
goto fail;
|
|
}
|
|
|
|
if ((blk_rq_pos(rq) & mask) || (blk_rq_sectors(rq) & mask)) {
|
|
scmd_printk(KERN_ERR, cmd, "request not aligned to the logical block size\n");
|
|
goto fail;
|
|
}
|
|
|
|
/*
|
|
* Some SD card readers can't handle accesses which touch the
|
|
* last one or two logical blocks. Split accesses as needed.
|
|
*/
|
|
threshold = sdkp->capacity - SD_LAST_BUGGY_SECTORS;
|
|
|
|
if (unlikely(sdp->last_sector_bug && lba + nr_blocks > threshold)) {
|
|
if (lba < threshold) {
|
|
/* Access up to the threshold but not beyond */
|
|
nr_blocks = threshold - lba;
|
|
} else {
|
|
/* Access only a single logical block */
|
|
nr_blocks = 1;
|
|
}
|
|
}
|
|
|
|
if (req_op(rq) == REQ_OP_ZONE_APPEND) {
|
|
ret = sd_zbc_prepare_zone_append(cmd, &lba, nr_blocks);
|
|
if (ret)
|
|
goto fail;
|
|
}
|
|
|
|
fua = rq->cmd_flags & REQ_FUA ? 0x8 : 0;
|
|
dix = scsi_prot_sg_count(cmd);
|
|
dif = scsi_host_dif_capable(cmd->device->host, sdkp->protection_type);
|
|
|
|
if (dif || dix)
|
|
protect = sd_setup_protect_cmnd(cmd, dix, dif);
|
|
else
|
|
protect = 0;
|
|
|
|
if (protect && sdkp->protection_type == T10_PI_TYPE2_PROTECTION) {
|
|
ret = sd_setup_rw32_cmnd(cmd, write, lba, nr_blocks,
|
|
protect | fua);
|
|
} else if (sdp->use_16_for_rw || (nr_blocks > 0xffff)) {
|
|
ret = sd_setup_rw16_cmnd(cmd, write, lba, nr_blocks,
|
|
protect | fua);
|
|
} else if ((nr_blocks > 0xff) || (lba > 0x1fffff) ||
|
|
sdp->use_10_for_rw || protect) {
|
|
ret = sd_setup_rw10_cmnd(cmd, write, lba, nr_blocks,
|
|
protect | fua);
|
|
} else {
|
|
ret = sd_setup_rw6_cmnd(cmd, write, lba, nr_blocks,
|
|
protect | fua);
|
|
}
|
|
|
|
if (unlikely(ret != BLK_STS_OK))
|
|
goto fail;
|
|
|
|
/*
|
|
* We shouldn't disconnect in the middle of a sector, so with a dumb
|
|
* host adapter, it's safe to assume that we can at least transfer
|
|
* this many bytes between each connect / disconnect.
|
|
*/
|
|
cmd->transfersize = sdp->sector_size;
|
|
cmd->underflow = nr_blocks << 9;
|
|
cmd->allowed = sdkp->max_retries;
|
|
cmd->sdb.length = nr_blocks * sdp->sector_size;
|
|
|
|
SCSI_LOG_HLQUEUE(1,
|
|
scmd_printk(KERN_INFO, cmd,
|
|
"%s: block=%llu, count=%d\n", __func__,
|
|
(unsigned long long)blk_rq_pos(rq),
|
|
blk_rq_sectors(rq)));
|
|
SCSI_LOG_HLQUEUE(2,
|
|
scmd_printk(KERN_INFO, cmd,
|
|
"%s %d/%u 512 byte blocks.\n",
|
|
write ? "writing" : "reading", nr_blocks,
|
|
blk_rq_sectors(rq)));
|
|
|
|
/*
|
|
* This indicates that the command is ready from our end to be queued.
|
|
*/
|
|
return BLK_STS_OK;
|
|
fail:
|
|
scsi_free_sgtables(cmd);
|
|
return ret;
|
|
}
|
|
|
|
static blk_status_t sd_init_command(struct scsi_cmnd *cmd)
|
|
{
|
|
struct request *rq = cmd->request;
|
|
|
|
switch (req_op(rq)) {
|
|
case REQ_OP_DISCARD:
|
|
switch (scsi_disk(rq->rq_disk)->provisioning_mode) {
|
|
case SD_LBP_UNMAP:
|
|
return sd_setup_unmap_cmnd(cmd);
|
|
case SD_LBP_WS16:
|
|
return sd_setup_write_same16_cmnd(cmd, true);
|
|
case SD_LBP_WS10:
|
|
return sd_setup_write_same10_cmnd(cmd, true);
|
|
case SD_LBP_ZERO:
|
|
return sd_setup_write_same10_cmnd(cmd, false);
|
|
default:
|
|
return BLK_STS_TARGET;
|
|
}
|
|
case REQ_OP_WRITE_ZEROES:
|
|
return sd_setup_write_zeroes_cmnd(cmd);
|
|
case REQ_OP_WRITE_SAME:
|
|
return sd_setup_write_same_cmnd(cmd);
|
|
case REQ_OP_FLUSH:
|
|
return sd_setup_flush_cmnd(cmd);
|
|
case REQ_OP_READ:
|
|
case REQ_OP_WRITE:
|
|
case REQ_OP_ZONE_APPEND:
|
|
return sd_setup_read_write_cmnd(cmd);
|
|
case REQ_OP_ZONE_RESET:
|
|
return sd_zbc_setup_zone_mgmt_cmnd(cmd, ZO_RESET_WRITE_POINTER,
|
|
false);
|
|
case REQ_OP_ZONE_RESET_ALL:
|
|
return sd_zbc_setup_zone_mgmt_cmnd(cmd, ZO_RESET_WRITE_POINTER,
|
|
true);
|
|
case REQ_OP_ZONE_OPEN:
|
|
return sd_zbc_setup_zone_mgmt_cmnd(cmd, ZO_OPEN_ZONE, false);
|
|
case REQ_OP_ZONE_CLOSE:
|
|
return sd_zbc_setup_zone_mgmt_cmnd(cmd, ZO_CLOSE_ZONE, false);
|
|
case REQ_OP_ZONE_FINISH:
|
|
return sd_zbc_setup_zone_mgmt_cmnd(cmd, ZO_FINISH_ZONE, false);
|
|
default:
|
|
WARN_ON_ONCE(1);
|
|
return BLK_STS_NOTSUPP;
|
|
}
|
|
}
|
|
|
|
static void sd_uninit_command(struct scsi_cmnd *SCpnt)
|
|
{
|
|
struct request *rq = SCpnt->request;
|
|
u8 *cmnd;
|
|
|
|
if (rq->rq_flags & RQF_SPECIAL_PAYLOAD)
|
|
mempool_free(rq->special_vec.bv_page, sd_page_pool);
|
|
|
|
if (SCpnt->cmnd != scsi_req(rq)->cmd) {
|
|
cmnd = SCpnt->cmnd;
|
|
SCpnt->cmnd = NULL;
|
|
SCpnt->cmd_len = 0;
|
|
mempool_free(cmnd, sd_cdb_pool);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* sd_open - open a scsi disk device
|
|
* @bdev: Block device of the scsi disk to open
|
|
* @mode: FMODE_* mask
|
|
*
|
|
* Returns 0 if successful. Returns a negated errno value in case
|
|
* of error.
|
|
*
|
|
* Note: This can be called from a user context (e.g. fsck(1) )
|
|
* or from within the kernel (e.g. as a result of a mount(1) ).
|
|
* In the latter case @inode and @filp carry an abridged amount
|
|
* of information as noted above.
|
|
*
|
|
* Locking: called with bdev->bd_mutex held.
|
|
**/
|
|
static int sd_open(struct block_device *bdev, fmode_t mode)
|
|
{
|
|
struct scsi_disk *sdkp = scsi_disk_get(bdev->bd_disk);
|
|
struct scsi_device *sdev;
|
|
int retval;
|
|
|
|
if (!sdkp)
|
|
return -ENXIO;
|
|
|
|
SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_open\n"));
|
|
|
|
sdev = sdkp->device;
|
|
|
|
/*
|
|
* If the device is in error recovery, wait until it is done.
|
|
* If the device is offline, then disallow any access to it.
|
|
*/
|
|
retval = -ENXIO;
|
|
if (!scsi_block_when_processing_errors(sdev))
|
|
goto error_out;
|
|
|
|
if (sdev->removable || sdkp->write_prot) {
|
|
if (bdev_check_media_change(bdev))
|
|
sd_revalidate_disk(bdev->bd_disk);
|
|
}
|
|
|
|
/*
|
|
* If the drive is empty, just let the open fail.
|
|
*/
|
|
retval = -ENOMEDIUM;
|
|
if (sdev->removable && !sdkp->media_present && !(mode & FMODE_NDELAY))
|
|
goto error_out;
|
|
|
|
/*
|
|
* If the device has the write protect tab set, have the open fail
|
|
* if the user expects to be able to write to the thing.
|
|
*/
|
|
retval = -EROFS;
|
|
if (sdkp->write_prot && (mode & FMODE_WRITE))
|
|
goto error_out;
|
|
|
|
/*
|
|
* It is possible that the disk changing stuff resulted in
|
|
* the device being taken offline. If this is the case,
|
|
* report this to the user, and don't pretend that the
|
|
* open actually succeeded.
|
|
*/
|
|
retval = -ENXIO;
|
|
if (!scsi_device_online(sdev))
|
|
goto error_out;
|
|
|
|
if ((atomic_inc_return(&sdkp->openers) == 1) && sdev->removable) {
|
|
if (scsi_block_when_processing_errors(sdev))
|
|
scsi_set_medium_removal(sdev, SCSI_REMOVAL_PREVENT);
|
|
}
|
|
|
|
return 0;
|
|
|
|
error_out:
|
|
scsi_disk_put(sdkp);
|
|
return retval;
|
|
}
|
|
|
|
/**
|
|
* sd_release - invoked when the (last) close(2) is called on this
|
|
* scsi disk.
|
|
* @disk: disk to release
|
|
* @mode: FMODE_* mask
|
|
*
|
|
* Returns 0.
|
|
*
|
|
* Note: may block (uninterruptible) if error recovery is underway
|
|
* on this disk.
|
|
*
|
|
* Locking: called with bdev->bd_mutex held.
|
|
**/
|
|
static void sd_release(struct gendisk *disk, fmode_t mode)
|
|
{
|
|
struct scsi_disk *sdkp = scsi_disk(disk);
|
|
struct scsi_device *sdev = sdkp->device;
|
|
|
|
SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_release\n"));
|
|
|
|
if (atomic_dec_return(&sdkp->openers) == 0 && sdev->removable) {
|
|
if (scsi_block_when_processing_errors(sdev))
|
|
scsi_set_medium_removal(sdev, SCSI_REMOVAL_ALLOW);
|
|
}
|
|
|
|
scsi_disk_put(sdkp);
|
|
}
|
|
|
|
static int sd_getgeo(struct block_device *bdev, struct hd_geometry *geo)
|
|
{
|
|
struct scsi_disk *sdkp = scsi_disk(bdev->bd_disk);
|
|
struct scsi_device *sdp = sdkp->device;
|
|
struct Scsi_Host *host = sdp->host;
|
|
sector_t capacity = logical_to_sectors(sdp, sdkp->capacity);
|
|
int diskinfo[4];
|
|
|
|
/* default to most commonly used values */
|
|
diskinfo[0] = 0x40; /* 1 << 6 */
|
|
diskinfo[1] = 0x20; /* 1 << 5 */
|
|
diskinfo[2] = capacity >> 11;
|
|
|
|
/* override with calculated, extended default, or driver values */
|
|
if (host->hostt->bios_param)
|
|
host->hostt->bios_param(sdp, bdev, capacity, diskinfo);
|
|
else
|
|
scsicam_bios_param(bdev, capacity, diskinfo);
|
|
|
|
geo->heads = diskinfo[0];
|
|
geo->sectors = diskinfo[1];
|
|
geo->cylinders = diskinfo[2];
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* sd_ioctl - process an ioctl
|
|
* @bdev: target block device
|
|
* @mode: FMODE_* mask
|
|
* @cmd: ioctl command number
|
|
* @p: this is third argument given to ioctl(2) system call.
|
|
* Often contains a pointer.
|
|
*
|
|
* Returns 0 if successful (some ioctls return positive numbers on
|
|
* success as well). Returns a negated errno value in case of error.
|
|
*
|
|
* Note: most ioctls are forward onto the block subsystem or further
|
|
* down in the scsi subsystem.
|
|
**/
|
|
static int sd_ioctl_common(struct block_device *bdev, fmode_t mode,
|
|
unsigned int cmd, void __user *p)
|
|
{
|
|
struct gendisk *disk = bdev->bd_disk;
|
|
struct scsi_disk *sdkp = scsi_disk(disk);
|
|
struct scsi_device *sdp = sdkp->device;
|
|
int error;
|
|
|
|
SCSI_LOG_IOCTL(1, sd_printk(KERN_INFO, sdkp, "sd_ioctl: disk=%s, "
|
|
"cmd=0x%x\n", disk->disk_name, cmd));
|
|
|
|
error = scsi_verify_blk_ioctl(bdev, cmd);
|
|
if (error < 0)
|
|
return error;
|
|
|
|
/*
|
|
* If we are in the middle of error recovery, don't let anyone
|
|
* else try and use this device. Also, if error recovery fails, it
|
|
* may try and take the device offline, in which case all further
|
|
* access to the device is prohibited.
|
|
*/
|
|
error = scsi_ioctl_block_when_processing_errors(sdp, cmd,
|
|
(mode & FMODE_NDELAY) != 0);
|
|
if (error)
|
|
goto out;
|
|
|
|
if (is_sed_ioctl(cmd))
|
|
return sed_ioctl(sdkp->opal_dev, cmd, p);
|
|
|
|
/*
|
|
* Send SCSI addressing ioctls directly to mid level, send other
|
|
* ioctls to block level and then onto mid level if they can't be
|
|
* resolved.
|
|
*/
|
|
switch (cmd) {
|
|
case SCSI_IOCTL_GET_IDLUN:
|
|
case SCSI_IOCTL_GET_BUS_NUMBER:
|
|
error = scsi_ioctl(sdp, cmd, p);
|
|
break;
|
|
default:
|
|
error = scsi_cmd_blk_ioctl(bdev, mode, cmd, p);
|
|
break;
|
|
}
|
|
out:
|
|
return error;
|
|
}
|
|
|
|
static void set_media_not_present(struct scsi_disk *sdkp)
|
|
{
|
|
if (sdkp->media_present)
|
|
sdkp->device->changed = 1;
|
|
|
|
if (sdkp->device->removable) {
|
|
sdkp->media_present = 0;
|
|
sdkp->capacity = 0;
|
|
}
|
|
}
|
|
|
|
static int media_not_present(struct scsi_disk *sdkp,
|
|
struct scsi_sense_hdr *sshdr)
|
|
{
|
|
if (!scsi_sense_valid(sshdr))
|
|
return 0;
|
|
|
|
/* not invoked for commands that could return deferred errors */
|
|
switch (sshdr->sense_key) {
|
|
case UNIT_ATTENTION:
|
|
case NOT_READY:
|
|
/* medium not present */
|
|
if (sshdr->asc == 0x3A) {
|
|
set_media_not_present(sdkp);
|
|
return 1;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* sd_check_events - check media events
|
|
* @disk: kernel device descriptor
|
|
* @clearing: disk events currently being cleared
|
|
*
|
|
* Returns mask of DISK_EVENT_*.
|
|
*
|
|
* Note: this function is invoked from the block subsystem.
|
|
**/
|
|
static unsigned int sd_check_events(struct gendisk *disk, unsigned int clearing)
|
|
{
|
|
struct scsi_disk *sdkp = scsi_disk_get(disk);
|
|
struct scsi_device *sdp;
|
|
int retval;
|
|
|
|
if (!sdkp)
|
|
return 0;
|
|
|
|
sdp = sdkp->device;
|
|
SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_check_events\n"));
|
|
|
|
/*
|
|
* If the device is offline, don't send any commands - just pretend as
|
|
* if the command failed. If the device ever comes back online, we
|
|
* can deal with it then. It is only because of unrecoverable errors
|
|
* that we would ever take a device offline in the first place.
|
|
*/
|
|
if (!scsi_device_online(sdp)) {
|
|
set_media_not_present(sdkp);
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* Using TEST_UNIT_READY enables differentiation between drive with
|
|
* no cartridge loaded - NOT READY, drive with changed cartridge -
|
|
* UNIT ATTENTION, or with same cartridge - GOOD STATUS.
|
|
*
|
|
* Drives that auto spin down. eg iomega jaz 1G, will be started
|
|
* by sd_spinup_disk() from sd_revalidate_disk(), which happens whenever
|
|
* sd_revalidate() is called.
|
|
*/
|
|
if (scsi_block_when_processing_errors(sdp)) {
|
|
struct scsi_sense_hdr sshdr = { 0, };
|
|
|
|
retval = scsi_test_unit_ready(sdp, SD_TIMEOUT, sdkp->max_retries,
|
|
&sshdr);
|
|
|
|
/* failed to execute TUR, assume media not present */
|
|
if (host_byte(retval)) {
|
|
set_media_not_present(sdkp);
|
|
goto out;
|
|
}
|
|
|
|
if (media_not_present(sdkp, &sshdr))
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* For removable scsi disk we have to recognise the presence
|
|
* of a disk in the drive.
|
|
*/
|
|
if (!sdkp->media_present)
|
|
sdp->changed = 1;
|
|
sdkp->media_present = 1;
|
|
out:
|
|
/*
|
|
* sdp->changed is set under the following conditions:
|
|
*
|
|
* Medium present state has changed in either direction.
|
|
* Device has indicated UNIT_ATTENTION.
|
|
*/
|
|
retval = sdp->changed ? DISK_EVENT_MEDIA_CHANGE : 0;
|
|
sdp->changed = 0;
|
|
scsi_disk_put(sdkp);
|
|
return retval;
|
|
}
|
|
|
|
static int sd_sync_cache(struct scsi_disk *sdkp, struct scsi_sense_hdr *sshdr)
|
|
{
|
|
int retries, res;
|
|
struct scsi_device *sdp = sdkp->device;
|
|
const int timeout = sdp->request_queue->rq_timeout
|
|
* SD_FLUSH_TIMEOUT_MULTIPLIER;
|
|
struct scsi_sense_hdr my_sshdr;
|
|
|
|
if (!scsi_device_online(sdp))
|
|
return -ENODEV;
|
|
|
|
/* caller might not be interested in sense, but we need it */
|
|
if (!sshdr)
|
|
sshdr = &my_sshdr;
|
|
|
|
for (retries = 3; retries > 0; --retries) {
|
|
unsigned char cmd[10] = { 0 };
|
|
|
|
cmd[0] = SYNCHRONIZE_CACHE;
|
|
/*
|
|
* Leave the rest of the command zero to indicate
|
|
* flush everything.
|
|
*/
|
|
res = scsi_execute(sdp, cmd, DMA_NONE, NULL, 0, NULL, sshdr,
|
|
timeout, sdkp->max_retries, 0, RQF_PM, NULL);
|
|
if (res == 0)
|
|
break;
|
|
}
|
|
|
|
if (res) {
|
|
sd_print_result(sdkp, "Synchronize Cache(10) failed", res);
|
|
|
|
if (driver_byte(res) == DRIVER_SENSE)
|
|
sd_print_sense_hdr(sdkp, sshdr);
|
|
|
|
/* we need to evaluate the error return */
|
|
if (scsi_sense_valid(sshdr) &&
|
|
(sshdr->asc == 0x3a || /* medium not present */
|
|
sshdr->asc == 0x20 || /* invalid command */
|
|
(sshdr->asc == 0x74 && sshdr->ascq == 0x71))) /* drive is password locked */
|
|
/* this is no error here */
|
|
return 0;
|
|
|
|
switch (host_byte(res)) {
|
|
/* ignore errors due to racing a disconnection */
|
|
case DID_BAD_TARGET:
|
|
case DID_NO_CONNECT:
|
|
return 0;
|
|
/* signal the upper layer it might try again */
|
|
case DID_BUS_BUSY:
|
|
case DID_IMM_RETRY:
|
|
case DID_REQUEUE:
|
|
case DID_SOFT_ERROR:
|
|
return -EBUSY;
|
|
default:
|
|
return -EIO;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void sd_rescan(struct device *dev)
|
|
{
|
|
struct scsi_disk *sdkp = dev_get_drvdata(dev);
|
|
|
|
sd_revalidate_disk(sdkp->disk);
|
|
}
|
|
|
|
static int sd_ioctl(struct block_device *bdev, fmode_t mode,
|
|
unsigned int cmd, unsigned long arg)
|
|
{
|
|
void __user *p = (void __user *)arg;
|
|
int ret;
|
|
|
|
ret = sd_ioctl_common(bdev, mode, cmd, p);
|
|
if (ret != -ENOTTY)
|
|
return ret;
|
|
|
|
return scsi_ioctl(scsi_disk(bdev->bd_disk)->device, cmd, p);
|
|
}
|
|
|
|
#ifdef CONFIG_COMPAT
|
|
static int sd_compat_ioctl(struct block_device *bdev, fmode_t mode,
|
|
unsigned int cmd, unsigned long arg)
|
|
{
|
|
void __user *p = compat_ptr(arg);
|
|
int ret;
|
|
|
|
ret = sd_ioctl_common(bdev, mode, cmd, p);
|
|
if (ret != -ENOTTY)
|
|
return ret;
|
|
|
|
return scsi_compat_ioctl(scsi_disk(bdev->bd_disk)->device, cmd, p);
|
|
}
|
|
#endif
|
|
|
|
static char sd_pr_type(enum pr_type type)
|
|
{
|
|
switch (type) {
|
|
case PR_WRITE_EXCLUSIVE:
|
|
return 0x01;
|
|
case PR_EXCLUSIVE_ACCESS:
|
|
return 0x03;
|
|
case PR_WRITE_EXCLUSIVE_REG_ONLY:
|
|
return 0x05;
|
|
case PR_EXCLUSIVE_ACCESS_REG_ONLY:
|
|
return 0x06;
|
|
case PR_WRITE_EXCLUSIVE_ALL_REGS:
|
|
return 0x07;
|
|
case PR_EXCLUSIVE_ACCESS_ALL_REGS:
|
|
return 0x08;
|
|
default:
|
|
return 0;
|
|
}
|
|
};
|
|
|
|
static int sd_pr_command(struct block_device *bdev, u8 sa,
|
|
u64 key, u64 sa_key, u8 type, u8 flags)
|
|
{
|
|
struct scsi_disk *sdkp = scsi_disk(bdev->bd_disk);
|
|
struct scsi_device *sdev = sdkp->device;
|
|
struct scsi_sense_hdr sshdr;
|
|
int result;
|
|
u8 cmd[16] = { 0, };
|
|
u8 data[24] = { 0, };
|
|
|
|
cmd[0] = PERSISTENT_RESERVE_OUT;
|
|
cmd[1] = sa;
|
|
cmd[2] = type;
|
|
put_unaligned_be32(sizeof(data), &cmd[5]);
|
|
|
|
put_unaligned_be64(key, &data[0]);
|
|
put_unaligned_be64(sa_key, &data[8]);
|
|
data[20] = flags;
|
|
|
|
result = scsi_execute_req(sdev, cmd, DMA_TO_DEVICE, &data, sizeof(data),
|
|
&sshdr, SD_TIMEOUT, sdkp->max_retries, NULL);
|
|
|
|
if (driver_byte(result) == DRIVER_SENSE &&
|
|
scsi_sense_valid(&sshdr)) {
|
|
sdev_printk(KERN_INFO, sdev, "PR command failed: %d\n", result);
|
|
scsi_print_sense_hdr(sdev, NULL, &sshdr);
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
static int sd_pr_register(struct block_device *bdev, u64 old_key, u64 new_key,
|
|
u32 flags)
|
|
{
|
|
if (flags & ~PR_FL_IGNORE_KEY)
|
|
return -EOPNOTSUPP;
|
|
return sd_pr_command(bdev, (flags & PR_FL_IGNORE_KEY) ? 0x06 : 0x00,
|
|
old_key, new_key, 0,
|
|
(1 << 0) /* APTPL */);
|
|
}
|
|
|
|
static int sd_pr_reserve(struct block_device *bdev, u64 key, enum pr_type type,
|
|
u32 flags)
|
|
{
|
|
if (flags)
|
|
return -EOPNOTSUPP;
|
|
return sd_pr_command(bdev, 0x01, key, 0, sd_pr_type(type), 0);
|
|
}
|
|
|
|
static int sd_pr_release(struct block_device *bdev, u64 key, enum pr_type type)
|
|
{
|
|
return sd_pr_command(bdev, 0x02, key, 0, sd_pr_type(type), 0);
|
|
}
|
|
|
|
static int sd_pr_preempt(struct block_device *bdev, u64 old_key, u64 new_key,
|
|
enum pr_type type, bool abort)
|
|
{
|
|
return sd_pr_command(bdev, abort ? 0x05 : 0x04, old_key, new_key,
|
|
sd_pr_type(type), 0);
|
|
}
|
|
|
|
static int sd_pr_clear(struct block_device *bdev, u64 key)
|
|
{
|
|
return sd_pr_command(bdev, 0x03, key, 0, 0, 0);
|
|
}
|
|
|
|
static const struct pr_ops sd_pr_ops = {
|
|
.pr_register = sd_pr_register,
|
|
.pr_reserve = sd_pr_reserve,
|
|
.pr_release = sd_pr_release,
|
|
.pr_preempt = sd_pr_preempt,
|
|
.pr_clear = sd_pr_clear,
|
|
};
|
|
|
|
static const struct block_device_operations sd_fops = {
|
|
.owner = THIS_MODULE,
|
|
.open = sd_open,
|
|
.release = sd_release,
|
|
.ioctl = sd_ioctl,
|
|
.getgeo = sd_getgeo,
|
|
#ifdef CONFIG_COMPAT
|
|
.compat_ioctl = sd_compat_ioctl,
|
|
#endif
|
|
.check_events = sd_check_events,
|
|
.unlock_native_capacity = sd_unlock_native_capacity,
|
|
.report_zones = sd_zbc_report_zones,
|
|
.pr_ops = &sd_pr_ops,
|
|
};
|
|
|
|
/**
|
|
* sd_eh_reset - reset error handling callback
|
|
* @scmd: sd-issued command that has failed
|
|
*
|
|
* This function is called by the SCSI midlayer before starting
|
|
* SCSI EH. When counting medium access failures we have to be
|
|
* careful to register it only only once per device and SCSI EH run;
|
|
* there might be several timed out commands which will cause the
|
|
* 'max_medium_access_timeouts' counter to trigger after the first
|
|
* SCSI EH run already and set the device to offline.
|
|
* So this function resets the internal counter before starting SCSI EH.
|
|
**/
|
|
static void sd_eh_reset(struct scsi_cmnd *scmd)
|
|
{
|
|
struct scsi_disk *sdkp = scsi_disk(scmd->request->rq_disk);
|
|
|
|
/* New SCSI EH run, reset gate variable */
|
|
sdkp->ignore_medium_access_errors = false;
|
|
}
|
|
|
|
/**
|
|
* sd_eh_action - error handling callback
|
|
* @scmd: sd-issued command that has failed
|
|
* @eh_disp: The recovery disposition suggested by the midlayer
|
|
*
|
|
* This function is called by the SCSI midlayer upon completion of an
|
|
* error test command (currently TEST UNIT READY). The result of sending
|
|
* the eh command is passed in eh_disp. We're looking for devices that
|
|
* fail medium access commands but are OK with non access commands like
|
|
* test unit ready (so wrongly see the device as having a successful
|
|
* recovery)
|
|
**/
|
|
static int sd_eh_action(struct scsi_cmnd *scmd, int eh_disp)
|
|
{
|
|
struct scsi_disk *sdkp = scsi_disk(scmd->request->rq_disk);
|
|
struct scsi_device *sdev = scmd->device;
|
|
|
|
if (!scsi_device_online(sdev) ||
|
|
!scsi_medium_access_command(scmd) ||
|
|
host_byte(scmd->result) != DID_TIME_OUT ||
|
|
eh_disp != SUCCESS)
|
|
return eh_disp;
|
|
|
|
/*
|
|
* The device has timed out executing a medium access command.
|
|
* However, the TEST UNIT READY command sent during error
|
|
* handling completed successfully. Either the device is in the
|
|
* process of recovering or has it suffered an internal failure
|
|
* that prevents access to the storage medium.
|
|
*/
|
|
if (!sdkp->ignore_medium_access_errors) {
|
|
sdkp->medium_access_timed_out++;
|
|
sdkp->ignore_medium_access_errors = true;
|
|
}
|
|
|
|
/*
|
|
* If the device keeps failing read/write commands but TEST UNIT
|
|
* READY always completes successfully we assume that medium
|
|
* access is no longer possible and take the device offline.
|
|
*/
|
|
if (sdkp->medium_access_timed_out >= sdkp->max_medium_access_timeouts) {
|
|
scmd_printk(KERN_ERR, scmd,
|
|
"Medium access timeout failure. Offlining disk!\n");
|
|
mutex_lock(&sdev->state_mutex);
|
|
scsi_device_set_state(sdev, SDEV_OFFLINE);
|
|
mutex_unlock(&sdev->state_mutex);
|
|
|
|
return SUCCESS;
|
|
}
|
|
|
|
return eh_disp;
|
|
}
|
|
|
|
static unsigned int sd_completed_bytes(struct scsi_cmnd *scmd)
|
|
{
|
|
struct request *req = scmd->request;
|
|
struct scsi_device *sdev = scmd->device;
|
|
unsigned int transferred, good_bytes;
|
|
u64 start_lba, end_lba, bad_lba;
|
|
|
|
/*
|
|
* Some commands have a payload smaller than the device logical
|
|
* block size (e.g. INQUIRY on a 4K disk).
|
|
*/
|
|
if (scsi_bufflen(scmd) <= sdev->sector_size)
|
|
return 0;
|
|
|
|
/* Check if we have a 'bad_lba' information */
|
|
if (!scsi_get_sense_info_fld(scmd->sense_buffer,
|
|
SCSI_SENSE_BUFFERSIZE,
|
|
&bad_lba))
|
|
return 0;
|
|
|
|
/*
|
|
* If the bad lba was reported incorrectly, we have no idea where
|
|
* the error is.
|
|
*/
|
|
start_lba = sectors_to_logical(sdev, blk_rq_pos(req));
|
|
end_lba = start_lba + bytes_to_logical(sdev, scsi_bufflen(scmd));
|
|
if (bad_lba < start_lba || bad_lba >= end_lba)
|
|
return 0;
|
|
|
|
/*
|
|
* resid is optional but mostly filled in. When it's unused,
|
|
* its value is zero, so we assume the whole buffer transferred
|
|
*/
|
|
transferred = scsi_bufflen(scmd) - scsi_get_resid(scmd);
|
|
|
|
/* This computation should always be done in terms of the
|
|
* resolution of the device's medium.
|
|
*/
|
|
good_bytes = logical_to_bytes(sdev, bad_lba - start_lba);
|
|
|
|
return min(good_bytes, transferred);
|
|
}
|
|
|
|
/**
|
|
* sd_done - bottom half handler: called when the lower level
|
|
* driver has completed (successfully or otherwise) a scsi command.
|
|
* @SCpnt: mid-level's per command structure.
|
|
*
|
|
* Note: potentially run from within an ISR. Must not block.
|
|
**/
|
|
static int sd_done(struct scsi_cmnd *SCpnt)
|
|
{
|
|
int result = SCpnt->result;
|
|
unsigned int good_bytes = result ? 0 : scsi_bufflen(SCpnt);
|
|
unsigned int sector_size = SCpnt->device->sector_size;
|
|
unsigned int resid;
|
|
struct scsi_sense_hdr sshdr;
|
|
struct scsi_disk *sdkp = scsi_disk(SCpnt->request->rq_disk);
|
|
struct request *req = SCpnt->request;
|
|
int sense_valid = 0;
|
|
int sense_deferred = 0;
|
|
|
|
switch (req_op(req)) {
|
|
case REQ_OP_DISCARD:
|
|
case REQ_OP_WRITE_ZEROES:
|
|
case REQ_OP_WRITE_SAME:
|
|
case REQ_OP_ZONE_RESET:
|
|
case REQ_OP_ZONE_RESET_ALL:
|
|
case REQ_OP_ZONE_OPEN:
|
|
case REQ_OP_ZONE_CLOSE:
|
|
case REQ_OP_ZONE_FINISH:
|
|
if (!result) {
|
|
good_bytes = blk_rq_bytes(req);
|
|
scsi_set_resid(SCpnt, 0);
|
|
} else {
|
|
good_bytes = 0;
|
|
scsi_set_resid(SCpnt, blk_rq_bytes(req));
|
|
}
|
|
break;
|
|
default:
|
|
/*
|
|
* In case of bogus fw or device, we could end up having
|
|
* an unaligned partial completion. Check this here and force
|
|
* alignment.
|
|
*/
|
|
resid = scsi_get_resid(SCpnt);
|
|
if (resid & (sector_size - 1)) {
|
|
sd_printk(KERN_INFO, sdkp,
|
|
"Unaligned partial completion (resid=%u, sector_sz=%u)\n",
|
|
resid, sector_size);
|
|
scsi_print_command(SCpnt);
|
|
resid = min(scsi_bufflen(SCpnt),
|
|
round_up(resid, sector_size));
|
|
scsi_set_resid(SCpnt, resid);
|
|
}
|
|
}
|
|
|
|
if (result) {
|
|
sense_valid = scsi_command_normalize_sense(SCpnt, &sshdr);
|
|
if (sense_valid)
|
|
sense_deferred = scsi_sense_is_deferred(&sshdr);
|
|
}
|
|
sdkp->medium_access_timed_out = 0;
|
|
|
|
if (driver_byte(result) != DRIVER_SENSE &&
|
|
(!sense_valid || sense_deferred))
|
|
goto out;
|
|
|
|
switch (sshdr.sense_key) {
|
|
case HARDWARE_ERROR:
|
|
case MEDIUM_ERROR:
|
|
good_bytes = sd_completed_bytes(SCpnt);
|
|
break;
|
|
case RECOVERED_ERROR:
|
|
good_bytes = scsi_bufflen(SCpnt);
|
|
break;
|
|
case NO_SENSE:
|
|
/* This indicates a false check condition, so ignore it. An
|
|
* unknown amount of data was transferred so treat it as an
|
|
* error.
|
|
*/
|
|
SCpnt->result = 0;
|
|
memset(SCpnt->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
|
|
break;
|
|
case ABORTED_COMMAND:
|
|
if (sshdr.asc == 0x10) /* DIF: Target detected corruption */
|
|
good_bytes = sd_completed_bytes(SCpnt);
|
|
break;
|
|
case ILLEGAL_REQUEST:
|
|
switch (sshdr.asc) {
|
|
case 0x10: /* DIX: Host detected corruption */
|
|
good_bytes = sd_completed_bytes(SCpnt);
|
|
break;
|
|
case 0x20: /* INVALID COMMAND OPCODE */
|
|
case 0x24: /* INVALID FIELD IN CDB */
|
|
switch (SCpnt->cmnd[0]) {
|
|
case UNMAP:
|
|
sd_config_discard(sdkp, SD_LBP_DISABLE);
|
|
break;
|
|
case WRITE_SAME_16:
|
|
case WRITE_SAME:
|
|
if (SCpnt->cmnd[1] & 8) { /* UNMAP */
|
|
sd_config_discard(sdkp, SD_LBP_DISABLE);
|
|
} else {
|
|
sdkp->device->no_write_same = 1;
|
|
sd_config_write_same(sdkp);
|
|
req->rq_flags |= RQF_QUIET;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
out:
|
|
if (sd_is_zoned(sdkp))
|
|
good_bytes = sd_zbc_complete(SCpnt, good_bytes, &sshdr);
|
|
|
|
SCSI_LOG_HLCOMPLETE(1, scmd_printk(KERN_INFO, SCpnt,
|
|
"sd_done: completed %d of %d bytes\n",
|
|
good_bytes, scsi_bufflen(SCpnt)));
|
|
|
|
return good_bytes;
|
|
}
|
|
|
|
/*
|
|
* spinup disk - called only in sd_revalidate_disk()
|
|
*/
|
|
static void
|
|
sd_spinup_disk(struct scsi_disk *sdkp)
|
|
{
|
|
unsigned char cmd[10];
|
|
unsigned long spintime_expire = 0;
|
|
int retries, spintime;
|
|
unsigned int the_result;
|
|
struct scsi_sense_hdr sshdr;
|
|
int sense_valid = 0;
|
|
|
|
spintime = 0;
|
|
|
|
/* Spin up drives, as required. Only do this at boot time */
|
|
/* Spinup needs to be done for module loads too. */
|
|
do {
|
|
retries = 0;
|
|
|
|
do {
|
|
cmd[0] = TEST_UNIT_READY;
|
|
memset((void *) &cmd[1], 0, 9);
|
|
|
|
the_result = scsi_execute_req(sdkp->device, cmd,
|
|
DMA_NONE, NULL, 0,
|
|
&sshdr, SD_TIMEOUT,
|
|
sdkp->max_retries, NULL);
|
|
|
|
/*
|
|
* If the drive has indicated to us that it
|
|
* doesn't have any media in it, don't bother
|
|
* with any more polling.
|
|
*/
|
|
if (media_not_present(sdkp, &sshdr))
|
|
return;
|
|
|
|
if (the_result)
|
|
sense_valid = scsi_sense_valid(&sshdr);
|
|
retries++;
|
|
} while (retries < 3 &&
|
|
(!scsi_status_is_good(the_result) ||
|
|
((driver_byte(the_result) == DRIVER_SENSE) &&
|
|
sense_valid && sshdr.sense_key == UNIT_ATTENTION)));
|
|
|
|
if (driver_byte(the_result) != DRIVER_SENSE) {
|
|
/* no sense, TUR either succeeded or failed
|
|
* with a status error */
|
|
if(!spintime && !scsi_status_is_good(the_result)) {
|
|
sd_print_result(sdkp, "Test Unit Ready failed",
|
|
the_result);
|
|
}
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* The device does not want the automatic start to be issued.
|
|
*/
|
|
if (sdkp->device->no_start_on_add)
|
|
break;
|
|
|
|
if (sense_valid && sshdr.sense_key == NOT_READY) {
|
|
if (sshdr.asc == 4 && sshdr.ascq == 3)
|
|
break; /* manual intervention required */
|
|
if (sshdr.asc == 4 && sshdr.ascq == 0xb)
|
|
break; /* standby */
|
|
if (sshdr.asc == 4 && sshdr.ascq == 0xc)
|
|
break; /* unavailable */
|
|
if (sshdr.asc == 4 && sshdr.ascq == 0x1b)
|
|
break; /* sanitize in progress */
|
|
/*
|
|
* Issue command to spin up drive when not ready
|
|
*/
|
|
if (!spintime) {
|
|
sd_printk(KERN_NOTICE, sdkp, "Spinning up disk...");
|
|
cmd[0] = START_STOP;
|
|
cmd[1] = 1; /* Return immediately */
|
|
memset((void *) &cmd[2], 0, 8);
|
|
cmd[4] = 1; /* Start spin cycle */
|
|
if (sdkp->device->start_stop_pwr_cond)
|
|
cmd[4] |= 1 << 4;
|
|
scsi_execute_req(sdkp->device, cmd, DMA_NONE,
|
|
NULL, 0, &sshdr,
|
|
SD_TIMEOUT, sdkp->max_retries,
|
|
NULL);
|
|
spintime_expire = jiffies + 100 * HZ;
|
|
spintime = 1;
|
|
}
|
|
/* Wait 1 second for next try */
|
|
msleep(1000);
|
|
printk(KERN_CONT ".");
|
|
|
|
/*
|
|
* Wait for USB flash devices with slow firmware.
|
|
* Yes, this sense key/ASC combination shouldn't
|
|
* occur here. It's characteristic of these devices.
|
|
*/
|
|
} else if (sense_valid &&
|
|
sshdr.sense_key == UNIT_ATTENTION &&
|
|
sshdr.asc == 0x28) {
|
|
if (!spintime) {
|
|
spintime_expire = jiffies + 5 * HZ;
|
|
spintime = 1;
|
|
}
|
|
/* Wait 1 second for next try */
|
|
msleep(1000);
|
|
} else {
|
|
/* we don't understand the sense code, so it's
|
|
* probably pointless to loop */
|
|
if(!spintime) {
|
|
sd_printk(KERN_NOTICE, sdkp, "Unit Not Ready\n");
|
|
sd_print_sense_hdr(sdkp, &sshdr);
|
|
}
|
|
break;
|
|
}
|
|
|
|
} while (spintime && time_before_eq(jiffies, spintime_expire));
|
|
|
|
if (spintime) {
|
|
if (scsi_status_is_good(the_result))
|
|
printk(KERN_CONT "ready\n");
|
|
else
|
|
printk(KERN_CONT "not responding...\n");
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Determine whether disk supports Data Integrity Field.
|
|
*/
|
|
static int sd_read_protection_type(struct scsi_disk *sdkp, unsigned char *buffer)
|
|
{
|
|
struct scsi_device *sdp = sdkp->device;
|
|
u8 type;
|
|
int ret = 0;
|
|
|
|
if (scsi_device_protection(sdp) == 0 || (buffer[12] & 1) == 0) {
|
|
sdkp->protection_type = 0;
|
|
return ret;
|
|
}
|
|
|
|
type = ((buffer[12] >> 1) & 7) + 1; /* P_TYPE 0 = Type 1 */
|
|
|
|
if (type > T10_PI_TYPE3_PROTECTION)
|
|
ret = -ENODEV;
|
|
else if (scsi_host_dif_capable(sdp->host, type))
|
|
ret = 1;
|
|
|
|
if (sdkp->first_scan || type != sdkp->protection_type)
|
|
switch (ret) {
|
|
case -ENODEV:
|
|
sd_printk(KERN_ERR, sdkp, "formatted with unsupported" \
|
|
" protection type %u. Disabling disk!\n",
|
|
type);
|
|
break;
|
|
case 1:
|
|
sd_printk(KERN_NOTICE, sdkp,
|
|
"Enabling DIF Type %u protection\n", type);
|
|
break;
|
|
case 0:
|
|
sd_printk(KERN_NOTICE, sdkp,
|
|
"Disabling DIF Type %u protection\n", type);
|
|
break;
|
|
}
|
|
|
|
sdkp->protection_type = type;
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void read_capacity_error(struct scsi_disk *sdkp, struct scsi_device *sdp,
|
|
struct scsi_sense_hdr *sshdr, int sense_valid,
|
|
int the_result)
|
|
{
|
|
if (driver_byte(the_result) == DRIVER_SENSE)
|
|
sd_print_sense_hdr(sdkp, sshdr);
|
|
else
|
|
sd_printk(KERN_NOTICE, sdkp, "Sense not available.\n");
|
|
|
|
/*
|
|
* Set dirty bit for removable devices if not ready -
|
|
* sometimes drives will not report this properly.
|
|
*/
|
|
if (sdp->removable &&
|
|
sense_valid && sshdr->sense_key == NOT_READY)
|
|
set_media_not_present(sdkp);
|
|
|
|
/*
|
|
* We used to set media_present to 0 here to indicate no media
|
|
* in the drive, but some drives fail read capacity even with
|
|
* media present, so we can't do that.
|
|
*/
|
|
sdkp->capacity = 0; /* unknown mapped to zero - as usual */
|
|
}
|
|
|
|
#define RC16_LEN 32
|
|
#if RC16_LEN > SD_BUF_SIZE
|
|
#error RC16_LEN must not be more than SD_BUF_SIZE
|
|
#endif
|
|
|
|
#define READ_CAPACITY_RETRIES_ON_RESET 10
|
|
|
|
static int read_capacity_16(struct scsi_disk *sdkp, struct scsi_device *sdp,
|
|
unsigned char *buffer)
|
|
{
|
|
unsigned char cmd[16];
|
|
struct scsi_sense_hdr sshdr;
|
|
int sense_valid = 0;
|
|
int the_result;
|
|
int retries = 3, reset_retries = READ_CAPACITY_RETRIES_ON_RESET;
|
|
unsigned int alignment;
|
|
unsigned long long lba;
|
|
unsigned sector_size;
|
|
|
|
if (sdp->no_read_capacity_16)
|
|
return -EINVAL;
|
|
|
|
do {
|
|
memset(cmd, 0, 16);
|
|
cmd[0] = SERVICE_ACTION_IN_16;
|
|
cmd[1] = SAI_READ_CAPACITY_16;
|
|
cmd[13] = RC16_LEN;
|
|
memset(buffer, 0, RC16_LEN);
|
|
|
|
the_result = scsi_execute_req(sdp, cmd, DMA_FROM_DEVICE,
|
|
buffer, RC16_LEN, &sshdr,
|
|
SD_TIMEOUT, sdkp->max_retries, NULL);
|
|
|
|
if (media_not_present(sdkp, &sshdr))
|
|
return -ENODEV;
|
|
|
|
if (the_result) {
|
|
sense_valid = scsi_sense_valid(&sshdr);
|
|
if (sense_valid &&
|
|
sshdr.sense_key == ILLEGAL_REQUEST &&
|
|
(sshdr.asc == 0x20 || sshdr.asc == 0x24) &&
|
|
sshdr.ascq == 0x00)
|
|
/* Invalid Command Operation Code or
|
|
* Invalid Field in CDB, just retry
|
|
* silently with RC10 */
|
|
return -EINVAL;
|
|
if (sense_valid &&
|
|
sshdr.sense_key == UNIT_ATTENTION &&
|
|
sshdr.asc == 0x29 && sshdr.ascq == 0x00)
|
|
/* Device reset might occur several times,
|
|
* give it one more chance */
|
|
if (--reset_retries > 0)
|
|
continue;
|
|
}
|
|
retries--;
|
|
|
|
} while (the_result && retries);
|
|
|
|
if (the_result) {
|
|
sd_print_result(sdkp, "Read Capacity(16) failed", the_result);
|
|
read_capacity_error(sdkp, sdp, &sshdr, sense_valid, the_result);
|
|
return -EINVAL;
|
|
}
|
|
|
|
sector_size = get_unaligned_be32(&buffer[8]);
|
|
lba = get_unaligned_be64(&buffer[0]);
|
|
|
|
if (sd_read_protection_type(sdkp, buffer) < 0) {
|
|
sdkp->capacity = 0;
|
|
return -ENODEV;
|
|
}
|
|
|
|
/* Logical blocks per physical block exponent */
|
|
sdkp->physical_block_size = (1 << (buffer[13] & 0xf)) * sector_size;
|
|
|
|
/* RC basis */
|
|
sdkp->rc_basis = (buffer[12] >> 4) & 0x3;
|
|
|
|
/* Lowest aligned logical block */
|
|
alignment = ((buffer[14] & 0x3f) << 8 | buffer[15]) * sector_size;
|
|
blk_queue_alignment_offset(sdp->request_queue, alignment);
|
|
if (alignment && sdkp->first_scan)
|
|
sd_printk(KERN_NOTICE, sdkp,
|
|
"physical block alignment offset: %u\n", alignment);
|
|
|
|
if (buffer[14] & 0x80) { /* LBPME */
|
|
sdkp->lbpme = 1;
|
|
|
|
if (buffer[14] & 0x40) /* LBPRZ */
|
|
sdkp->lbprz = 1;
|
|
|
|
sd_config_discard(sdkp, SD_LBP_WS16);
|
|
}
|
|
|
|
sdkp->capacity = lba + 1;
|
|
return sector_size;
|
|
}
|
|
|
|
static int read_capacity_10(struct scsi_disk *sdkp, struct scsi_device *sdp,
|
|
unsigned char *buffer)
|
|
{
|
|
unsigned char cmd[16];
|
|
struct scsi_sense_hdr sshdr;
|
|
int sense_valid = 0;
|
|
int the_result;
|
|
int retries = 3, reset_retries = READ_CAPACITY_RETRIES_ON_RESET;
|
|
sector_t lba;
|
|
unsigned sector_size;
|
|
|
|
do {
|
|
cmd[0] = READ_CAPACITY;
|
|
memset(&cmd[1], 0, 9);
|
|
memset(buffer, 0, 8);
|
|
|
|
the_result = scsi_execute_req(sdp, cmd, DMA_FROM_DEVICE,
|
|
buffer, 8, &sshdr,
|
|
SD_TIMEOUT, sdkp->max_retries, NULL);
|
|
|
|
if (media_not_present(sdkp, &sshdr))
|
|
return -ENODEV;
|
|
|
|
if (the_result) {
|
|
sense_valid = scsi_sense_valid(&sshdr);
|
|
if (sense_valid &&
|
|
sshdr.sense_key == UNIT_ATTENTION &&
|
|
sshdr.asc == 0x29 && sshdr.ascq == 0x00)
|
|
/* Device reset might occur several times,
|
|
* give it one more chance */
|
|
if (--reset_retries > 0)
|
|
continue;
|
|
}
|
|
retries--;
|
|
|
|
} while (the_result && retries);
|
|
|
|
if (the_result) {
|
|
sd_print_result(sdkp, "Read Capacity(10) failed", the_result);
|
|
read_capacity_error(sdkp, sdp, &sshdr, sense_valid, the_result);
|
|
return -EINVAL;
|
|
}
|
|
|
|
sector_size = get_unaligned_be32(&buffer[4]);
|
|
lba = get_unaligned_be32(&buffer[0]);
|
|
|
|
if (sdp->no_read_capacity_16 && (lba == 0xffffffff)) {
|
|
/* Some buggy (usb cardreader) devices return an lba of
|
|
0xffffffff when the want to report a size of 0 (with
|
|
which they really mean no media is present) */
|
|
sdkp->capacity = 0;
|
|
sdkp->physical_block_size = sector_size;
|
|
return sector_size;
|
|
}
|
|
|
|
sdkp->capacity = lba + 1;
|
|
sdkp->physical_block_size = sector_size;
|
|
return sector_size;
|
|
}
|
|
|
|
static int sd_try_rc16_first(struct scsi_device *sdp)
|
|
{
|
|
if (sdp->host->max_cmd_len < 16)
|
|
return 0;
|
|
if (sdp->try_rc_10_first)
|
|
return 0;
|
|
if (sdp->scsi_level > SCSI_SPC_2)
|
|
return 1;
|
|
if (scsi_device_protection(sdp))
|
|
return 1;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* read disk capacity
|
|
*/
|
|
static void
|
|
sd_read_capacity(struct scsi_disk *sdkp, unsigned char *buffer)
|
|
{
|
|
int sector_size;
|
|
struct scsi_device *sdp = sdkp->device;
|
|
|
|
if (sd_try_rc16_first(sdp)) {
|
|
sector_size = read_capacity_16(sdkp, sdp, buffer);
|
|
if (sector_size == -EOVERFLOW)
|
|
goto got_data;
|
|
if (sector_size == -ENODEV)
|
|
return;
|
|
if (sector_size < 0)
|
|
sector_size = read_capacity_10(sdkp, sdp, buffer);
|
|
if (sector_size < 0)
|
|
return;
|
|
} else {
|
|
sector_size = read_capacity_10(sdkp, sdp, buffer);
|
|
if (sector_size == -EOVERFLOW)
|
|
goto got_data;
|
|
if (sector_size < 0)
|
|
return;
|
|
if ((sizeof(sdkp->capacity) > 4) &&
|
|
(sdkp->capacity > 0xffffffffULL)) {
|
|
int old_sector_size = sector_size;
|
|
sd_printk(KERN_NOTICE, sdkp, "Very big device. "
|
|
"Trying to use READ CAPACITY(16).\n");
|
|
sector_size = read_capacity_16(sdkp, sdp, buffer);
|
|
if (sector_size < 0) {
|
|
sd_printk(KERN_NOTICE, sdkp,
|
|
"Using 0xffffffff as device size\n");
|
|
sdkp->capacity = 1 + (sector_t) 0xffffffff;
|
|
sector_size = old_sector_size;
|
|
goto got_data;
|
|
}
|
|
/* Remember that READ CAPACITY(16) succeeded */
|
|
sdp->try_rc_10_first = 0;
|
|
}
|
|
}
|
|
|
|
/* Some devices are known to return the total number of blocks,
|
|
* not the highest block number. Some devices have versions
|
|
* which do this and others which do not. Some devices we might
|
|
* suspect of doing this but we don't know for certain.
|
|
*
|
|
* If we know the reported capacity is wrong, decrement it. If
|
|
* we can only guess, then assume the number of blocks is even
|
|
* (usually true but not always) and err on the side of lowering
|
|
* the capacity.
|
|
*/
|
|
if (sdp->fix_capacity ||
|
|
(sdp->guess_capacity && (sdkp->capacity & 0x01))) {
|
|
sd_printk(KERN_INFO, sdkp, "Adjusting the sector count "
|
|
"from its reported value: %llu\n",
|
|
(unsigned long long) sdkp->capacity);
|
|
--sdkp->capacity;
|
|
}
|
|
|
|
got_data:
|
|
if (sector_size == 0) {
|
|
sector_size = 512;
|
|
sd_printk(KERN_NOTICE, sdkp, "Sector size 0 reported, "
|
|
"assuming 512.\n");
|
|
}
|
|
|
|
if (sector_size != 512 &&
|
|
sector_size != 1024 &&
|
|
sector_size != 2048 &&
|
|
sector_size != 4096) {
|
|
sd_printk(KERN_NOTICE, sdkp, "Unsupported sector size %d.\n",
|
|
sector_size);
|
|
/*
|
|
* The user might want to re-format the drive with
|
|
* a supported sectorsize. Once this happens, it
|
|
* would be relatively trivial to set the thing up.
|
|
* For this reason, we leave the thing in the table.
|
|
*/
|
|
sdkp->capacity = 0;
|
|
/*
|
|
* set a bogus sector size so the normal read/write
|
|
* logic in the block layer will eventually refuse any
|
|
* request on this device without tripping over power
|
|
* of two sector size assumptions
|
|
*/
|
|
sector_size = 512;
|
|
}
|
|
blk_queue_logical_block_size(sdp->request_queue, sector_size);
|
|
blk_queue_physical_block_size(sdp->request_queue,
|
|
sdkp->physical_block_size);
|
|
sdkp->device->sector_size = sector_size;
|
|
|
|
if (sdkp->capacity > 0xffffffff)
|
|
sdp->use_16_for_rw = 1;
|
|
|
|
}
|
|
|
|
/*
|
|
* Print disk capacity
|
|
*/
|
|
static void
|
|
sd_print_capacity(struct scsi_disk *sdkp,
|
|
sector_t old_capacity)
|
|
{
|
|
int sector_size = sdkp->device->sector_size;
|
|
char cap_str_2[10], cap_str_10[10];
|
|
|
|
if (!sdkp->first_scan && old_capacity == sdkp->capacity)
|
|
return;
|
|
|
|
string_get_size(sdkp->capacity, sector_size,
|
|
STRING_UNITS_2, cap_str_2, sizeof(cap_str_2));
|
|
string_get_size(sdkp->capacity, sector_size,
|
|
STRING_UNITS_10, cap_str_10, sizeof(cap_str_10));
|
|
|
|
sd_printk(KERN_NOTICE, sdkp,
|
|
"%llu %d-byte logical blocks: (%s/%s)\n",
|
|
(unsigned long long)sdkp->capacity,
|
|
sector_size, cap_str_10, cap_str_2);
|
|
|
|
if (sdkp->physical_block_size != sector_size)
|
|
sd_printk(KERN_NOTICE, sdkp,
|
|
"%u-byte physical blocks\n",
|
|
sdkp->physical_block_size);
|
|
}
|
|
|
|
/* called with buffer of length 512 */
|
|
static inline int
|
|
sd_do_mode_sense(struct scsi_disk *sdkp, int dbd, int modepage,
|
|
unsigned char *buffer, int len, struct scsi_mode_data *data,
|
|
struct scsi_sense_hdr *sshdr)
|
|
{
|
|
return scsi_mode_sense(sdkp->device, dbd, modepage, buffer, len,
|
|
SD_TIMEOUT, sdkp->max_retries, data,
|
|
sshdr);
|
|
}
|
|
|
|
/*
|
|
* read write protect setting, if possible - called only in sd_revalidate_disk()
|
|
* called with buffer of length SD_BUF_SIZE
|
|
*/
|
|
static void
|
|
sd_read_write_protect_flag(struct scsi_disk *sdkp, unsigned char *buffer)
|
|
{
|
|
int res;
|
|
struct scsi_device *sdp = sdkp->device;
|
|
struct scsi_mode_data data;
|
|
int old_wp = sdkp->write_prot;
|
|
|
|
set_disk_ro(sdkp->disk, 0);
|
|
if (sdp->skip_ms_page_3f) {
|
|
sd_first_printk(KERN_NOTICE, sdkp, "Assuming Write Enabled\n");
|
|
return;
|
|
}
|
|
|
|
if (sdp->use_192_bytes_for_3f) {
|
|
res = sd_do_mode_sense(sdkp, 0, 0x3F, buffer, 192, &data, NULL);
|
|
} else {
|
|
/*
|
|
* First attempt: ask for all pages (0x3F), but only 4 bytes.
|
|
* We have to start carefully: some devices hang if we ask
|
|
* for more than is available.
|
|
*/
|
|
res = sd_do_mode_sense(sdkp, 0, 0x3F, buffer, 4, &data, NULL);
|
|
|
|
/*
|
|
* Second attempt: ask for page 0 When only page 0 is
|
|
* implemented, a request for page 3F may return Sense Key
|
|
* 5: Illegal Request, Sense Code 24: Invalid field in
|
|
* CDB.
|
|
*/
|
|
if (!scsi_status_is_good(res))
|
|
res = sd_do_mode_sense(sdkp, 0, 0, buffer, 4, &data, NULL);
|
|
|
|
/*
|
|
* Third attempt: ask 255 bytes, as we did earlier.
|
|
*/
|
|
if (!scsi_status_is_good(res))
|
|
res = sd_do_mode_sense(sdkp, 0, 0x3F, buffer, 255,
|
|
&data, NULL);
|
|
}
|
|
|
|
if (!scsi_status_is_good(res)) {
|
|
sd_first_printk(KERN_WARNING, sdkp,
|
|
"Test WP failed, assume Write Enabled\n");
|
|
} else {
|
|
sdkp->write_prot = ((data.device_specific & 0x80) != 0);
|
|
set_disk_ro(sdkp->disk, sdkp->write_prot);
|
|
if (sdkp->first_scan || old_wp != sdkp->write_prot) {
|
|
sd_printk(KERN_NOTICE, sdkp, "Write Protect is %s\n",
|
|
sdkp->write_prot ? "on" : "off");
|
|
sd_printk(KERN_DEBUG, sdkp, "Mode Sense: %4ph\n", buffer);
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* sd_read_cache_type - called only from sd_revalidate_disk()
|
|
* called with buffer of length SD_BUF_SIZE
|
|
*/
|
|
static void
|
|
sd_read_cache_type(struct scsi_disk *sdkp, unsigned char *buffer)
|
|
{
|
|
int len = 0, res;
|
|
struct scsi_device *sdp = sdkp->device;
|
|
|
|
int dbd;
|
|
int modepage;
|
|
int first_len;
|
|
struct scsi_mode_data data;
|
|
struct scsi_sense_hdr sshdr;
|
|
int old_wce = sdkp->WCE;
|
|
int old_rcd = sdkp->RCD;
|
|
int old_dpofua = sdkp->DPOFUA;
|
|
|
|
|
|
if (sdkp->cache_override)
|
|
return;
|
|
|
|
first_len = 4;
|
|
if (sdp->skip_ms_page_8) {
|
|
if (sdp->type == TYPE_RBC)
|
|
goto defaults;
|
|
else {
|
|
if (sdp->skip_ms_page_3f)
|
|
goto defaults;
|
|
modepage = 0x3F;
|
|
if (sdp->use_192_bytes_for_3f)
|
|
first_len = 192;
|
|
dbd = 0;
|
|
}
|
|
} else if (sdp->type == TYPE_RBC) {
|
|
modepage = 6;
|
|
dbd = 8;
|
|
} else {
|
|
modepage = 8;
|
|
dbd = 0;
|
|
}
|
|
|
|
/* cautiously ask */
|
|
res = sd_do_mode_sense(sdkp, dbd, modepage, buffer, first_len,
|
|
&data, &sshdr);
|
|
|
|
if (!scsi_status_is_good(res))
|
|
goto bad_sense;
|
|
|
|
if (!data.header_length) {
|
|
modepage = 6;
|
|
first_len = 0;
|
|
sd_first_printk(KERN_ERR, sdkp,
|
|
"Missing header in MODE_SENSE response\n");
|
|
}
|
|
|
|
/* that went OK, now ask for the proper length */
|
|
len = data.length;
|
|
|
|
/*
|
|
* We're only interested in the first three bytes, actually.
|
|
* But the data cache page is defined for the first 20.
|
|
*/
|
|
if (len < 3)
|
|
goto bad_sense;
|
|
else if (len > SD_BUF_SIZE) {
|
|
sd_first_printk(KERN_NOTICE, sdkp, "Truncating mode parameter "
|
|
"data from %d to %d bytes\n", len, SD_BUF_SIZE);
|
|
len = SD_BUF_SIZE;
|
|
}
|
|
if (modepage == 0x3F && sdp->use_192_bytes_for_3f)
|
|
len = 192;
|
|
|
|
/* Get the data */
|
|
if (len > first_len)
|
|
res = sd_do_mode_sense(sdkp, dbd, modepage, buffer, len,
|
|
&data, &sshdr);
|
|
|
|
if (scsi_status_is_good(res)) {
|
|
int offset = data.header_length + data.block_descriptor_length;
|
|
|
|
while (offset < len) {
|
|
u8 page_code = buffer[offset] & 0x3F;
|
|
u8 spf = buffer[offset] & 0x40;
|
|
|
|
if (page_code == 8 || page_code == 6) {
|
|
/* We're interested only in the first 3 bytes.
|
|
*/
|
|
if (len - offset <= 2) {
|
|
sd_first_printk(KERN_ERR, sdkp,
|
|
"Incomplete mode parameter "
|
|
"data\n");
|
|
goto defaults;
|
|
} else {
|
|
modepage = page_code;
|
|
goto Page_found;
|
|
}
|
|
} else {
|
|
/* Go to the next page */
|
|
if (spf && len - offset > 3)
|
|
offset += 4 + (buffer[offset+2] << 8) +
|
|
buffer[offset+3];
|
|
else if (!spf && len - offset > 1)
|
|
offset += 2 + buffer[offset+1];
|
|
else {
|
|
sd_first_printk(KERN_ERR, sdkp,
|
|
"Incomplete mode "
|
|
"parameter data\n");
|
|
goto defaults;
|
|
}
|
|
}
|
|
}
|
|
|
|
sd_first_printk(KERN_ERR, sdkp, "No Caching mode page found\n");
|
|
goto defaults;
|
|
|
|
Page_found:
|
|
if (modepage == 8) {
|
|
sdkp->WCE = ((buffer[offset + 2] & 0x04) != 0);
|
|
sdkp->RCD = ((buffer[offset + 2] & 0x01) != 0);
|
|
} else {
|
|
sdkp->WCE = ((buffer[offset + 2] & 0x01) == 0);
|
|
sdkp->RCD = 0;
|
|
}
|
|
|
|
sdkp->DPOFUA = (data.device_specific & 0x10) != 0;
|
|
if (sdp->broken_fua) {
|
|
sd_first_printk(KERN_NOTICE, sdkp, "Disabling FUA\n");
|
|
sdkp->DPOFUA = 0;
|
|
} else if (sdkp->DPOFUA && !sdkp->device->use_10_for_rw &&
|
|
!sdkp->device->use_16_for_rw) {
|
|
sd_first_printk(KERN_NOTICE, sdkp,
|
|
"Uses READ/WRITE(6), disabling FUA\n");
|
|
sdkp->DPOFUA = 0;
|
|
}
|
|
|
|
/* No cache flush allowed for write protected devices */
|
|
if (sdkp->WCE && sdkp->write_prot)
|
|
sdkp->WCE = 0;
|
|
|
|
if (sdkp->first_scan || old_wce != sdkp->WCE ||
|
|
old_rcd != sdkp->RCD || old_dpofua != sdkp->DPOFUA)
|
|
sd_printk(KERN_NOTICE, sdkp,
|
|
"Write cache: %s, read cache: %s, %s\n",
|
|
sdkp->WCE ? "enabled" : "disabled",
|
|
sdkp->RCD ? "disabled" : "enabled",
|
|
sdkp->DPOFUA ? "supports DPO and FUA"
|
|
: "doesn't support DPO or FUA");
|
|
|
|
return;
|
|
}
|
|
|
|
bad_sense:
|
|
if (scsi_sense_valid(&sshdr) &&
|
|
sshdr.sense_key == ILLEGAL_REQUEST &&
|
|
sshdr.asc == 0x24 && sshdr.ascq == 0x0)
|
|
/* Invalid field in CDB */
|
|
sd_first_printk(KERN_NOTICE, sdkp, "Cache data unavailable\n");
|
|
else
|
|
sd_first_printk(KERN_ERR, sdkp,
|
|
"Asking for cache data failed\n");
|
|
|
|
defaults:
|
|
if (sdp->wce_default_on) {
|
|
sd_first_printk(KERN_NOTICE, sdkp,
|
|
"Assuming drive cache: write back\n");
|
|
sdkp->WCE = 1;
|
|
} else {
|
|
sd_first_printk(KERN_ERR, sdkp,
|
|
"Assuming drive cache: write through\n");
|
|
sdkp->WCE = 0;
|
|
}
|
|
sdkp->RCD = 0;
|
|
sdkp->DPOFUA = 0;
|
|
}
|
|
|
|
/*
|
|
* The ATO bit indicates whether the DIF application tag is available
|
|
* for use by the operating system.
|
|
*/
|
|
static void sd_read_app_tag_own(struct scsi_disk *sdkp, unsigned char *buffer)
|
|
{
|
|
int res, offset;
|
|
struct scsi_device *sdp = sdkp->device;
|
|
struct scsi_mode_data data;
|
|
struct scsi_sense_hdr sshdr;
|
|
|
|
if (sdp->type != TYPE_DISK && sdp->type != TYPE_ZBC)
|
|
return;
|
|
|
|
if (sdkp->protection_type == 0)
|
|
return;
|
|
|
|
res = scsi_mode_sense(sdp, 1, 0x0a, buffer, 36, SD_TIMEOUT,
|
|
sdkp->max_retries, &data, &sshdr);
|
|
|
|
if (!scsi_status_is_good(res) || !data.header_length ||
|
|
data.length < 6) {
|
|
sd_first_printk(KERN_WARNING, sdkp,
|
|
"getting Control mode page failed, assume no ATO\n");
|
|
|
|
if (scsi_sense_valid(&sshdr))
|
|
sd_print_sense_hdr(sdkp, &sshdr);
|
|
|
|
return;
|
|
}
|
|
|
|
offset = data.header_length + data.block_descriptor_length;
|
|
|
|
if ((buffer[offset] & 0x3f) != 0x0a) {
|
|
sd_first_printk(KERN_ERR, sdkp, "ATO Got wrong page\n");
|
|
return;
|
|
}
|
|
|
|
if ((buffer[offset + 5] & 0x80) == 0)
|
|
return;
|
|
|
|
sdkp->ATO = 1;
|
|
|
|
return;
|
|
}
|
|
|
|
/**
|
|
* sd_read_block_limits - Query disk device for preferred I/O sizes.
|
|
* @sdkp: disk to query
|
|
*/
|
|
static void sd_read_block_limits(struct scsi_disk *sdkp)
|
|
{
|
|
unsigned int sector_sz = sdkp->device->sector_size;
|
|
const int vpd_len = 64;
|
|
unsigned char *buffer = kmalloc(vpd_len, GFP_KERNEL);
|
|
|
|
if (!buffer ||
|
|
/* Block Limits VPD */
|
|
scsi_get_vpd_page(sdkp->device, 0xb0, buffer, vpd_len))
|
|
goto out;
|
|
|
|
blk_queue_io_min(sdkp->disk->queue,
|
|
get_unaligned_be16(&buffer[6]) * sector_sz);
|
|
|
|
sdkp->max_xfer_blocks = get_unaligned_be32(&buffer[8]);
|
|
sdkp->opt_xfer_blocks = get_unaligned_be32(&buffer[12]);
|
|
|
|
if (buffer[3] == 0x3c) {
|
|
unsigned int lba_count, desc_count;
|
|
|
|
sdkp->max_ws_blocks = (u32)get_unaligned_be64(&buffer[36]);
|
|
|
|
if (!sdkp->lbpme)
|
|
goto out;
|
|
|
|
lba_count = get_unaligned_be32(&buffer[20]);
|
|
desc_count = get_unaligned_be32(&buffer[24]);
|
|
|
|
if (lba_count && desc_count)
|
|
sdkp->max_unmap_blocks = lba_count;
|
|
|
|
sdkp->unmap_granularity = get_unaligned_be32(&buffer[28]);
|
|
|
|
if (buffer[32] & 0x80)
|
|
sdkp->unmap_alignment =
|
|
get_unaligned_be32(&buffer[32]) & ~(1 << 31);
|
|
|
|
if (!sdkp->lbpvpd) { /* LBP VPD page not provided */
|
|
|
|
if (sdkp->max_unmap_blocks)
|
|
sd_config_discard(sdkp, SD_LBP_UNMAP);
|
|
else
|
|
sd_config_discard(sdkp, SD_LBP_WS16);
|
|
|
|
} else { /* LBP VPD page tells us what to use */
|
|
if (sdkp->lbpu && sdkp->max_unmap_blocks)
|
|
sd_config_discard(sdkp, SD_LBP_UNMAP);
|
|
else if (sdkp->lbpws)
|
|
sd_config_discard(sdkp, SD_LBP_WS16);
|
|
else if (sdkp->lbpws10)
|
|
sd_config_discard(sdkp, SD_LBP_WS10);
|
|
else
|
|
sd_config_discard(sdkp, SD_LBP_DISABLE);
|
|
}
|
|
}
|
|
|
|
out:
|
|
kfree(buffer);
|
|
}
|
|
|
|
/**
|
|
* sd_read_block_characteristics - Query block dev. characteristics
|
|
* @sdkp: disk to query
|
|
*/
|
|
static void sd_read_block_characteristics(struct scsi_disk *sdkp)
|
|
{
|
|
struct request_queue *q = sdkp->disk->queue;
|
|
unsigned char *buffer;
|
|
u16 rot;
|
|
const int vpd_len = 64;
|
|
|
|
buffer = kmalloc(vpd_len, GFP_KERNEL);
|
|
|
|
if (!buffer ||
|
|
/* Block Device Characteristics VPD */
|
|
scsi_get_vpd_page(sdkp->device, 0xb1, buffer, vpd_len))
|
|
goto out;
|
|
|
|
rot = get_unaligned_be16(&buffer[4]);
|
|
|
|
if (rot == 1) {
|
|
blk_queue_flag_set(QUEUE_FLAG_NONROT, q);
|
|
blk_queue_flag_clear(QUEUE_FLAG_ADD_RANDOM, q);
|
|
}
|
|
|
|
if (sdkp->device->type == TYPE_ZBC) {
|
|
/* Host-managed */
|
|
blk_queue_set_zoned(sdkp->disk, BLK_ZONED_HM);
|
|
} else {
|
|
sdkp->zoned = (buffer[8] >> 4) & 3;
|
|
if (sdkp->zoned == 1) {
|
|
/* Host-aware */
|
|
blk_queue_set_zoned(sdkp->disk, BLK_ZONED_HA);
|
|
} else {
|
|
/* Regular disk or drive managed disk */
|
|
blk_queue_set_zoned(sdkp->disk, BLK_ZONED_NONE);
|
|
}
|
|
}
|
|
|
|
if (!sdkp->first_scan)
|
|
goto out;
|
|
|
|
if (blk_queue_is_zoned(q)) {
|
|
sd_printk(KERN_NOTICE, sdkp, "Host-%s zoned block device\n",
|
|
q->limits.zoned == BLK_ZONED_HM ? "managed" : "aware");
|
|
} else {
|
|
if (sdkp->zoned == 1)
|
|
sd_printk(KERN_NOTICE, sdkp,
|
|
"Host-aware SMR disk used as regular disk\n");
|
|
else if (sdkp->zoned == 2)
|
|
sd_printk(KERN_NOTICE, sdkp,
|
|
"Drive-managed SMR disk\n");
|
|
}
|
|
|
|
out:
|
|
kfree(buffer);
|
|
}
|
|
|
|
/**
|
|
* sd_read_block_provisioning - Query provisioning VPD page
|
|
* @sdkp: disk to query
|
|
*/
|
|
static void sd_read_block_provisioning(struct scsi_disk *sdkp)
|
|
{
|
|
unsigned char *buffer;
|
|
const int vpd_len = 8;
|
|
|
|
if (sdkp->lbpme == 0)
|
|
return;
|
|
|
|
buffer = kmalloc(vpd_len, GFP_KERNEL);
|
|
|
|
if (!buffer || scsi_get_vpd_page(sdkp->device, 0xb2, buffer, vpd_len))
|
|
goto out;
|
|
|
|
sdkp->lbpvpd = 1;
|
|
sdkp->lbpu = (buffer[5] >> 7) & 1; /* UNMAP */
|
|
sdkp->lbpws = (buffer[5] >> 6) & 1; /* WRITE SAME(16) with UNMAP */
|
|
sdkp->lbpws10 = (buffer[5] >> 5) & 1; /* WRITE SAME(10) with UNMAP */
|
|
|
|
out:
|
|
kfree(buffer);
|
|
}
|
|
|
|
static void sd_read_write_same(struct scsi_disk *sdkp, unsigned char *buffer)
|
|
{
|
|
struct scsi_device *sdev = sdkp->device;
|
|
|
|
if (sdev->host->no_write_same) {
|
|
sdev->no_write_same = 1;
|
|
|
|
return;
|
|
}
|
|
|
|
if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, INQUIRY) < 0) {
|
|
/* too large values might cause issues with arcmsr */
|
|
int vpd_buf_len = 64;
|
|
|
|
sdev->no_report_opcodes = 1;
|
|
|
|
/* Disable WRITE SAME if REPORT SUPPORTED OPERATION
|
|
* CODES is unsupported and the device has an ATA
|
|
* Information VPD page (SAT).
|
|
*/
|
|
if (!scsi_get_vpd_page(sdev, 0x89, buffer, vpd_buf_len))
|
|
sdev->no_write_same = 1;
|
|
}
|
|
|
|
if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, WRITE_SAME_16) == 1)
|
|
sdkp->ws16 = 1;
|
|
|
|
if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, WRITE_SAME) == 1)
|
|
sdkp->ws10 = 1;
|
|
}
|
|
|
|
static void sd_read_security(struct scsi_disk *sdkp, unsigned char *buffer)
|
|
{
|
|
struct scsi_device *sdev = sdkp->device;
|
|
|
|
if (!sdev->security_supported)
|
|
return;
|
|
|
|
if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE,
|
|
SECURITY_PROTOCOL_IN) == 1 &&
|
|
scsi_report_opcode(sdev, buffer, SD_BUF_SIZE,
|
|
SECURITY_PROTOCOL_OUT) == 1)
|
|
sdkp->security = 1;
|
|
}
|
|
|
|
/*
|
|
* Determine the device's preferred I/O size for reads and writes
|
|
* unless the reported value is unreasonably small, large, not a
|
|
* multiple of the physical block size, or simply garbage.
|
|
*/
|
|
static bool sd_validate_opt_xfer_size(struct scsi_disk *sdkp,
|
|
unsigned int dev_max)
|
|
{
|
|
struct scsi_device *sdp = sdkp->device;
|
|
unsigned int opt_xfer_bytes =
|
|
logical_to_bytes(sdp, sdkp->opt_xfer_blocks);
|
|
|
|
if (sdkp->opt_xfer_blocks == 0)
|
|
return false;
|
|
|
|
if (sdkp->opt_xfer_blocks > dev_max) {
|
|
sd_first_printk(KERN_WARNING, sdkp,
|
|
"Optimal transfer size %u logical blocks " \
|
|
"> dev_max (%u logical blocks)\n",
|
|
sdkp->opt_xfer_blocks, dev_max);
|
|
return false;
|
|
}
|
|
|
|
if (sdkp->opt_xfer_blocks > SD_DEF_XFER_BLOCKS) {
|
|
sd_first_printk(KERN_WARNING, sdkp,
|
|
"Optimal transfer size %u logical blocks " \
|
|
"> sd driver limit (%u logical blocks)\n",
|
|
sdkp->opt_xfer_blocks, SD_DEF_XFER_BLOCKS);
|
|
return false;
|
|
}
|
|
|
|
if (opt_xfer_bytes < PAGE_SIZE) {
|
|
sd_first_printk(KERN_WARNING, sdkp,
|
|
"Optimal transfer size %u bytes < " \
|
|
"PAGE_SIZE (%u bytes)\n",
|
|
opt_xfer_bytes, (unsigned int)PAGE_SIZE);
|
|
return false;
|
|
}
|
|
|
|
if (opt_xfer_bytes & (sdkp->physical_block_size - 1)) {
|
|
sd_first_printk(KERN_WARNING, sdkp,
|
|
"Optimal transfer size %u bytes not a " \
|
|
"multiple of physical block size (%u bytes)\n",
|
|
opt_xfer_bytes, sdkp->physical_block_size);
|
|
return false;
|
|
}
|
|
|
|
sd_first_printk(KERN_INFO, sdkp, "Optimal transfer size %u bytes\n",
|
|
opt_xfer_bytes);
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* sd_revalidate_disk - called the first time a new disk is seen,
|
|
* performs disk spin up, read_capacity, etc.
|
|
* @disk: struct gendisk we care about
|
|
**/
|
|
static int sd_revalidate_disk(struct gendisk *disk)
|
|
{
|
|
struct scsi_disk *sdkp = scsi_disk(disk);
|
|
struct scsi_device *sdp = sdkp->device;
|
|
struct request_queue *q = sdkp->disk->queue;
|
|
sector_t old_capacity = sdkp->capacity;
|
|
unsigned char *buffer;
|
|
unsigned int dev_max, rw_max;
|
|
|
|
SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp,
|
|
"sd_revalidate_disk\n"));
|
|
|
|
/*
|
|
* If the device is offline, don't try and read capacity or any
|
|
* of the other niceties.
|
|
*/
|
|
if (!scsi_device_online(sdp))
|
|
goto out;
|
|
|
|
buffer = kmalloc(SD_BUF_SIZE, GFP_KERNEL);
|
|
if (!buffer) {
|
|
sd_printk(KERN_WARNING, sdkp, "sd_revalidate_disk: Memory "
|
|
"allocation failure.\n");
|
|
goto out;
|
|
}
|
|
|
|
sd_spinup_disk(sdkp);
|
|
|
|
/*
|
|
* Without media there is no reason to ask; moreover, some devices
|
|
* react badly if we do.
|
|
*/
|
|
if (sdkp->media_present) {
|
|
sd_read_capacity(sdkp, buffer);
|
|
|
|
/*
|
|
* set the default to rotational. All non-rotational devices
|
|
* support the block characteristics VPD page, which will
|
|
* cause this to be updated correctly and any device which
|
|
* doesn't support it should be treated as rotational.
|
|
*/
|
|
blk_queue_flag_clear(QUEUE_FLAG_NONROT, q);
|
|
blk_queue_flag_set(QUEUE_FLAG_ADD_RANDOM, q);
|
|
|
|
if (scsi_device_supports_vpd(sdp)) {
|
|
sd_read_block_provisioning(sdkp);
|
|
sd_read_block_limits(sdkp);
|
|
sd_read_block_characteristics(sdkp);
|
|
sd_zbc_read_zones(sdkp, buffer);
|
|
}
|
|
|
|
sd_print_capacity(sdkp, old_capacity);
|
|
|
|
sd_read_write_protect_flag(sdkp, buffer);
|
|
sd_read_cache_type(sdkp, buffer);
|
|
sd_read_app_tag_own(sdkp, buffer);
|
|
sd_read_write_same(sdkp, buffer);
|
|
sd_read_security(sdkp, buffer);
|
|
}
|
|
|
|
/*
|
|
* We now have all cache related info, determine how we deal
|
|
* with flush requests.
|
|
*/
|
|
sd_set_flush_flag(sdkp);
|
|
|
|
/* Initial block count limit based on CDB TRANSFER LENGTH field size. */
|
|
dev_max = sdp->use_16_for_rw ? SD_MAX_XFER_BLOCKS : SD_DEF_XFER_BLOCKS;
|
|
|
|
/* Some devices report a maximum block count for READ/WRITE requests. */
|
|
dev_max = min_not_zero(dev_max, sdkp->max_xfer_blocks);
|
|
q->limits.max_dev_sectors = logical_to_sectors(sdp, dev_max);
|
|
|
|
if (sd_validate_opt_xfer_size(sdkp, dev_max)) {
|
|
q->limits.io_opt = logical_to_bytes(sdp, sdkp->opt_xfer_blocks);
|
|
rw_max = logical_to_sectors(sdp, sdkp->opt_xfer_blocks);
|
|
} else {
|
|
q->limits.io_opt = 0;
|
|
rw_max = min_not_zero(logical_to_sectors(sdp, dev_max),
|
|
(sector_t)BLK_DEF_MAX_SECTORS);
|
|
}
|
|
|
|
/* Do not exceed controller limit */
|
|
rw_max = min(rw_max, queue_max_hw_sectors(q));
|
|
|
|
/*
|
|
* Only update max_sectors if previously unset or if the current value
|
|
* exceeds the capabilities of the hardware.
|
|
*/
|
|
if (sdkp->first_scan ||
|
|
q->limits.max_sectors > q->limits.max_dev_sectors ||
|
|
q->limits.max_sectors > q->limits.max_hw_sectors)
|
|
q->limits.max_sectors = rw_max;
|
|
|
|
sdkp->first_scan = 0;
|
|
|
|
set_capacity_and_notify(disk, logical_to_sectors(sdp, sdkp->capacity));
|
|
sd_config_write_same(sdkp);
|
|
kfree(buffer);
|
|
|
|
/*
|
|
* For a zoned drive, revalidating the zones can be done only once
|
|
* the gendisk capacity is set. So if this fails, set back the gendisk
|
|
* capacity to 0.
|
|
*/
|
|
if (sd_zbc_revalidate_zones(sdkp))
|
|
set_capacity_and_notify(disk, 0);
|
|
|
|
out:
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* sd_unlock_native_capacity - unlock native capacity
|
|
* @disk: struct gendisk to set capacity for
|
|
*
|
|
* Block layer calls this function if it detects that partitions
|
|
* on @disk reach beyond the end of the device. If the SCSI host
|
|
* implements ->unlock_native_capacity() method, it's invoked to
|
|
* give it a chance to adjust the device capacity.
|
|
*
|
|
* CONTEXT:
|
|
* Defined by block layer. Might sleep.
|
|
*/
|
|
static void sd_unlock_native_capacity(struct gendisk *disk)
|
|
{
|
|
struct scsi_device *sdev = scsi_disk(disk)->device;
|
|
|
|
if (sdev->host->hostt->unlock_native_capacity)
|
|
sdev->host->hostt->unlock_native_capacity(sdev);
|
|
}
|
|
|
|
/**
|
|
* sd_format_disk_name - format disk name
|
|
* @prefix: name prefix - ie. "sd" for SCSI disks
|
|
* @index: index of the disk to format name for
|
|
* @buf: output buffer
|
|
* @buflen: length of the output buffer
|
|
*
|
|
* SCSI disk names starts at sda. The 26th device is sdz and the
|
|
* 27th is sdaa. The last one for two lettered suffix is sdzz
|
|
* which is followed by sdaaa.
|
|
*
|
|
* This is basically 26 base counting with one extra 'nil' entry
|
|
* at the beginning from the second digit on and can be
|
|
* determined using similar method as 26 base conversion with the
|
|
* index shifted -1 after each digit is computed.
|
|
*
|
|
* CONTEXT:
|
|
* Don't care.
|
|
*
|
|
* RETURNS:
|
|
* 0 on success, -errno on failure.
|
|
*/
|
|
static int sd_format_disk_name(char *prefix, int index, char *buf, int buflen)
|
|
{
|
|
const int base = 'z' - 'a' + 1;
|
|
char *begin = buf + strlen(prefix);
|
|
char *end = buf + buflen;
|
|
char *p;
|
|
int unit;
|
|
|
|
p = end - 1;
|
|
*p = '\0';
|
|
unit = base;
|
|
do {
|
|
if (p == begin)
|
|
return -EINVAL;
|
|
*--p = 'a' + (index % unit);
|
|
index = (index / unit) - 1;
|
|
} while (index >= 0);
|
|
|
|
memmove(begin, p, end - p);
|
|
memcpy(buf, prefix, strlen(prefix));
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* sd_probe - called during driver initialization and whenever a
|
|
* new scsi device is attached to the system. It is called once
|
|
* for each scsi device (not just disks) present.
|
|
* @dev: pointer to device object
|
|
*
|
|
* Returns 0 if successful (or not interested in this scsi device
|
|
* (e.g. scanner)); 1 when there is an error.
|
|
*
|
|
* Note: this function is invoked from the scsi mid-level.
|
|
* This function sets up the mapping between a given
|
|
* <host,channel,id,lun> (found in sdp) and new device name
|
|
* (e.g. /dev/sda). More precisely it is the block device major
|
|
* and minor number that is chosen here.
|
|
*
|
|
* Assume sd_probe is not re-entrant (for time being)
|
|
* Also think about sd_probe() and sd_remove() running coincidentally.
|
|
**/
|
|
static int sd_probe(struct device *dev)
|
|
{
|
|
struct scsi_device *sdp = to_scsi_device(dev);
|
|
struct scsi_disk *sdkp;
|
|
struct gendisk *gd;
|
|
int index;
|
|
int error;
|
|
|
|
scsi_autopm_get_device(sdp);
|
|
error = -ENODEV;
|
|
if (sdp->type != TYPE_DISK &&
|
|
sdp->type != TYPE_ZBC &&
|
|
sdp->type != TYPE_MOD &&
|
|
sdp->type != TYPE_RBC)
|
|
goto out;
|
|
|
|
if (!IS_ENABLED(CONFIG_BLK_DEV_ZONED) && sdp->type == TYPE_ZBC) {
|
|
sdev_printk(KERN_WARNING, sdp,
|
|
"Unsupported ZBC host-managed device.\n");
|
|
goto out;
|
|
}
|
|
|
|
SCSI_LOG_HLQUEUE(3, sdev_printk(KERN_INFO, sdp,
|
|
"sd_probe\n"));
|
|
|
|
error = -ENOMEM;
|
|
sdkp = kzalloc(sizeof(*sdkp), GFP_KERNEL);
|
|
if (!sdkp)
|
|
goto out;
|
|
|
|
gd = alloc_disk(SD_MINORS);
|
|
if (!gd)
|
|
goto out_free;
|
|
|
|
index = ida_alloc(&sd_index_ida, GFP_KERNEL);
|
|
if (index < 0) {
|
|
sdev_printk(KERN_WARNING, sdp, "sd_probe: memory exhausted.\n");
|
|
goto out_put;
|
|
}
|
|
|
|
error = sd_format_disk_name("sd", index, gd->disk_name, DISK_NAME_LEN);
|
|
if (error) {
|
|
sdev_printk(KERN_WARNING, sdp, "SCSI disk (sd) name length exceeded.\n");
|
|
goto out_free_index;
|
|
}
|
|
|
|
sdkp->device = sdp;
|
|
sdkp->driver = &sd_template;
|
|
sdkp->disk = gd;
|
|
sdkp->index = index;
|
|
sdkp->max_retries = SD_MAX_RETRIES;
|
|
atomic_set(&sdkp->openers, 0);
|
|
atomic_set(&sdkp->device->ioerr_cnt, 0);
|
|
|
|
if (!sdp->request_queue->rq_timeout) {
|
|
if (sdp->type != TYPE_MOD)
|
|
blk_queue_rq_timeout(sdp->request_queue, SD_TIMEOUT);
|
|
else
|
|
blk_queue_rq_timeout(sdp->request_queue,
|
|
SD_MOD_TIMEOUT);
|
|
}
|
|
|
|
device_initialize(&sdkp->dev);
|
|
sdkp->dev.parent = dev;
|
|
sdkp->dev.class = &sd_disk_class;
|
|
dev_set_name(&sdkp->dev, "%s", dev_name(dev));
|
|
|
|
error = device_add(&sdkp->dev);
|
|
if (error)
|
|
goto out_free_index;
|
|
|
|
get_device(dev);
|
|
dev_set_drvdata(dev, sdkp);
|
|
|
|
gd->major = sd_major((index & 0xf0) >> 4);
|
|
gd->first_minor = ((index & 0xf) << 4) | (index & 0xfff00);
|
|
|
|
gd->fops = &sd_fops;
|
|
gd->private_data = &sdkp->driver;
|
|
gd->queue = sdkp->device->request_queue;
|
|
|
|
/* defaults, until the device tells us otherwise */
|
|
sdp->sector_size = 512;
|
|
sdkp->capacity = 0;
|
|
sdkp->media_present = 1;
|
|
sdkp->write_prot = 0;
|
|
sdkp->cache_override = 0;
|
|
sdkp->WCE = 0;
|
|
sdkp->RCD = 0;
|
|
sdkp->ATO = 0;
|
|
sdkp->first_scan = 1;
|
|
sdkp->max_medium_access_timeouts = SD_MAX_MEDIUM_TIMEOUTS;
|
|
|
|
sd_revalidate_disk(gd);
|
|
|
|
gd->flags = GENHD_FL_EXT_DEVT;
|
|
if (sdp->removable) {
|
|
gd->flags |= GENHD_FL_REMOVABLE;
|
|
gd->events |= DISK_EVENT_MEDIA_CHANGE;
|
|
gd->event_flags = DISK_EVENT_FLAG_POLL | DISK_EVENT_FLAG_UEVENT;
|
|
}
|
|
|
|
blk_pm_runtime_init(sdp->request_queue, dev);
|
|
if (sdp->rpm_autosuspend) {
|
|
pm_runtime_set_autosuspend_delay(dev,
|
|
sdp->host->hostt->rpm_autosuspend_delay);
|
|
}
|
|
device_add_disk(dev, gd, NULL);
|
|
if (sdkp->capacity)
|
|
sd_dif_config_host(sdkp);
|
|
|
|
sd_revalidate_disk(gd);
|
|
|
|
if (sdkp->security) {
|
|
sdkp->opal_dev = init_opal_dev(sdkp, &sd_sec_submit);
|
|
if (sdkp->opal_dev)
|
|
sd_printk(KERN_NOTICE, sdkp, "supports TCG Opal\n");
|
|
}
|
|
|
|
sd_printk(KERN_NOTICE, sdkp, "Attached SCSI %sdisk\n",
|
|
sdp->removable ? "removable " : "");
|
|
scsi_autopm_put_device(sdp);
|
|
|
|
return 0;
|
|
|
|
out_free_index:
|
|
ida_free(&sd_index_ida, index);
|
|
out_put:
|
|
put_disk(gd);
|
|
out_free:
|
|
sd_zbc_release_disk(sdkp);
|
|
kfree(sdkp);
|
|
out:
|
|
scsi_autopm_put_device(sdp);
|
|
return error;
|
|
}
|
|
|
|
/**
|
|
* sd_remove - called whenever a scsi disk (previously recognized by
|
|
* sd_probe) is detached from the system. It is called (potentially
|
|
* multiple times) during sd module unload.
|
|
* @dev: pointer to device object
|
|
*
|
|
* Note: this function is invoked from the scsi mid-level.
|
|
* This function potentially frees up a device name (e.g. /dev/sdc)
|
|
* that could be re-used by a subsequent sd_probe().
|
|
* This function is not called when the built-in sd driver is "exit-ed".
|
|
**/
|
|
static int sd_remove(struct device *dev)
|
|
{
|
|
struct scsi_disk *sdkp;
|
|
|
|
sdkp = dev_get_drvdata(dev);
|
|
scsi_autopm_get_device(sdkp->device);
|
|
|
|
async_synchronize_full_domain(&scsi_sd_pm_domain);
|
|
device_del(&sdkp->dev);
|
|
del_gendisk(sdkp->disk);
|
|
sd_shutdown(dev);
|
|
|
|
free_opal_dev(sdkp->opal_dev);
|
|
|
|
mutex_lock(&sd_ref_mutex);
|
|
dev_set_drvdata(dev, NULL);
|
|
put_device(&sdkp->dev);
|
|
mutex_unlock(&sd_ref_mutex);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* scsi_disk_release - Called to free the scsi_disk structure
|
|
* @dev: pointer to embedded class device
|
|
*
|
|
* sd_ref_mutex must be held entering this routine. Because it is
|
|
* called on last put, you should always use the scsi_disk_get()
|
|
* scsi_disk_put() helpers which manipulate the semaphore directly
|
|
* and never do a direct put_device.
|
|
**/
|
|
static void scsi_disk_release(struct device *dev)
|
|
{
|
|
struct scsi_disk *sdkp = to_scsi_disk(dev);
|
|
struct gendisk *disk = sdkp->disk;
|
|
struct request_queue *q = disk->queue;
|
|
|
|
ida_free(&sd_index_ida, sdkp->index);
|
|
|
|
/*
|
|
* Wait until all requests that are in progress have completed.
|
|
* This is necessary to avoid that e.g. scsi_end_request() crashes
|
|
* due to clearing the disk->private_data pointer. Wait from inside
|
|
* scsi_disk_release() instead of from sd_release() to avoid that
|
|
* freezing and unfreezing the request queue affects user space I/O
|
|
* in case multiple processes open a /dev/sd... node concurrently.
|
|
*/
|
|
blk_mq_freeze_queue(q);
|
|
blk_mq_unfreeze_queue(q);
|
|
|
|
disk->private_data = NULL;
|
|
put_disk(disk);
|
|
put_device(&sdkp->device->sdev_gendev);
|
|
|
|
sd_zbc_release_disk(sdkp);
|
|
|
|
kfree(sdkp);
|
|
}
|
|
|
|
static int sd_start_stop_device(struct scsi_disk *sdkp, int start)
|
|
{
|
|
unsigned char cmd[6] = { START_STOP }; /* START_VALID */
|
|
struct scsi_sense_hdr sshdr;
|
|
struct scsi_device *sdp = sdkp->device;
|
|
int res;
|
|
|
|
if (start)
|
|
cmd[4] |= 1; /* START */
|
|
|
|
if (sdp->start_stop_pwr_cond)
|
|
cmd[4] |= start ? 1 << 4 : 3 << 4; /* Active or Standby */
|
|
|
|
if (!scsi_device_online(sdp))
|
|
return -ENODEV;
|
|
|
|
res = scsi_execute(sdp, cmd, DMA_NONE, NULL, 0, NULL, &sshdr,
|
|
SD_TIMEOUT, sdkp->max_retries, 0, RQF_PM, NULL);
|
|
if (res) {
|
|
sd_print_result(sdkp, "Start/Stop Unit failed", res);
|
|
if (driver_byte(res) == DRIVER_SENSE)
|
|
sd_print_sense_hdr(sdkp, &sshdr);
|
|
if (scsi_sense_valid(&sshdr) &&
|
|
/* 0x3a is medium not present */
|
|
sshdr.asc == 0x3a)
|
|
res = 0;
|
|
}
|
|
|
|
/* SCSI error codes must not go to the generic layer */
|
|
if (res)
|
|
return -EIO;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Send a SYNCHRONIZE CACHE instruction down to the device through
|
|
* the normal SCSI command structure. Wait for the command to
|
|
* complete.
|
|
*/
|
|
static void sd_shutdown(struct device *dev)
|
|
{
|
|
struct scsi_disk *sdkp = dev_get_drvdata(dev);
|
|
|
|
if (!sdkp)
|
|
return; /* this can happen */
|
|
|
|
if (pm_runtime_suspended(dev))
|
|
return;
|
|
|
|
if (sdkp->WCE && sdkp->media_present) {
|
|
sd_printk(KERN_NOTICE, sdkp, "Synchronizing SCSI cache\n");
|
|
sd_sync_cache(sdkp, NULL);
|
|
}
|
|
|
|
if (system_state != SYSTEM_RESTART && sdkp->device->manage_start_stop) {
|
|
sd_printk(KERN_NOTICE, sdkp, "Stopping disk\n");
|
|
sd_start_stop_device(sdkp, 0);
|
|
}
|
|
}
|
|
|
|
static int sd_suspend_common(struct device *dev, bool ignore_stop_errors)
|
|
{
|
|
struct scsi_disk *sdkp = dev_get_drvdata(dev);
|
|
struct scsi_sense_hdr sshdr;
|
|
int ret = 0;
|
|
|
|
if (!sdkp) /* E.g.: runtime suspend following sd_remove() */
|
|
return 0;
|
|
|
|
if (sdkp->WCE && sdkp->media_present) {
|
|
sd_printk(KERN_NOTICE, sdkp, "Synchronizing SCSI cache\n");
|
|
ret = sd_sync_cache(sdkp, &sshdr);
|
|
|
|
if (ret) {
|
|
/* ignore OFFLINE device */
|
|
if (ret == -ENODEV)
|
|
return 0;
|
|
|
|
if (!scsi_sense_valid(&sshdr) ||
|
|
sshdr.sense_key != ILLEGAL_REQUEST)
|
|
return ret;
|
|
|
|
/*
|
|
* sshdr.sense_key == ILLEGAL_REQUEST means this drive
|
|
* doesn't support sync. There's not much to do and
|
|
* suspend shouldn't fail.
|
|
*/
|
|
ret = 0;
|
|
}
|
|
}
|
|
|
|
if (sdkp->device->manage_start_stop) {
|
|
sd_printk(KERN_NOTICE, sdkp, "Stopping disk\n");
|
|
/* an error is not worth aborting a system sleep */
|
|
ret = sd_start_stop_device(sdkp, 0);
|
|
if (ignore_stop_errors)
|
|
ret = 0;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int sd_suspend_system(struct device *dev)
|
|
{
|
|
return sd_suspend_common(dev, true);
|
|
}
|
|
|
|
static int sd_suspend_runtime(struct device *dev)
|
|
{
|
|
return sd_suspend_common(dev, false);
|
|
}
|
|
|
|
static int sd_resume(struct device *dev)
|
|
{
|
|
struct scsi_disk *sdkp = dev_get_drvdata(dev);
|
|
int ret;
|
|
|
|
if (!sdkp) /* E.g.: runtime resume at the start of sd_probe() */
|
|
return 0;
|
|
|
|
if (!sdkp->device->manage_start_stop)
|
|
return 0;
|
|
|
|
sd_printk(KERN_NOTICE, sdkp, "Starting disk\n");
|
|
ret = sd_start_stop_device(sdkp, 1);
|
|
if (!ret)
|
|
opal_unlock_from_suspend(sdkp->opal_dev);
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* init_sd - entry point for this driver (both when built in or when
|
|
* a module).
|
|
*
|
|
* Note: this function registers this driver with the scsi mid-level.
|
|
**/
|
|
static int __init init_sd(void)
|
|
{
|
|
int majors = 0, i, err;
|
|
|
|
SCSI_LOG_HLQUEUE(3, printk("init_sd: sd driver entry point\n"));
|
|
|
|
for (i = 0; i < SD_MAJORS; i++) {
|
|
if (__register_blkdev(sd_major(i), "sd", sd_default_probe))
|
|
continue;
|
|
majors++;
|
|
}
|
|
|
|
if (!majors)
|
|
return -ENODEV;
|
|
|
|
err = class_register(&sd_disk_class);
|
|
if (err)
|
|
goto err_out;
|
|
|
|
sd_cdb_cache = kmem_cache_create("sd_ext_cdb", SD_EXT_CDB_SIZE,
|
|
0, 0, NULL);
|
|
if (!sd_cdb_cache) {
|
|
printk(KERN_ERR "sd: can't init extended cdb cache\n");
|
|
err = -ENOMEM;
|
|
goto err_out_class;
|
|
}
|
|
|
|
sd_cdb_pool = mempool_create_slab_pool(SD_MEMPOOL_SIZE, sd_cdb_cache);
|
|
if (!sd_cdb_pool) {
|
|
printk(KERN_ERR "sd: can't init extended cdb pool\n");
|
|
err = -ENOMEM;
|
|
goto err_out_cache;
|
|
}
|
|
|
|
sd_page_pool = mempool_create_page_pool(SD_MEMPOOL_SIZE, 0);
|
|
if (!sd_page_pool) {
|
|
printk(KERN_ERR "sd: can't init discard page pool\n");
|
|
err = -ENOMEM;
|
|
goto err_out_ppool;
|
|
}
|
|
|
|
err = scsi_register_driver(&sd_template.gendrv);
|
|
if (err)
|
|
goto err_out_driver;
|
|
|
|
return 0;
|
|
|
|
err_out_driver:
|
|
mempool_destroy(sd_page_pool);
|
|
|
|
err_out_ppool:
|
|
mempool_destroy(sd_cdb_pool);
|
|
|
|
err_out_cache:
|
|
kmem_cache_destroy(sd_cdb_cache);
|
|
|
|
err_out_class:
|
|
class_unregister(&sd_disk_class);
|
|
err_out:
|
|
for (i = 0; i < SD_MAJORS; i++)
|
|
unregister_blkdev(sd_major(i), "sd");
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* exit_sd - exit point for this driver (when it is a module).
|
|
*
|
|
* Note: this function unregisters this driver from the scsi mid-level.
|
|
**/
|
|
static void __exit exit_sd(void)
|
|
{
|
|
int i;
|
|
|
|
SCSI_LOG_HLQUEUE(3, printk("exit_sd: exiting sd driver\n"));
|
|
|
|
scsi_unregister_driver(&sd_template.gendrv);
|
|
mempool_destroy(sd_cdb_pool);
|
|
mempool_destroy(sd_page_pool);
|
|
kmem_cache_destroy(sd_cdb_cache);
|
|
|
|
class_unregister(&sd_disk_class);
|
|
|
|
for (i = 0; i < SD_MAJORS; i++)
|
|
unregister_blkdev(sd_major(i), "sd");
|
|
}
|
|
|
|
module_init(init_sd);
|
|
module_exit(exit_sd);
|
|
|
|
void sd_print_sense_hdr(struct scsi_disk *sdkp, struct scsi_sense_hdr *sshdr)
|
|
{
|
|
scsi_print_sense_hdr(sdkp->device,
|
|
sdkp->disk ? sdkp->disk->disk_name : NULL, sshdr);
|
|
}
|
|
|
|
void sd_print_result(const struct scsi_disk *sdkp, const char *msg, int result)
|
|
{
|
|
const char *hb_string = scsi_hostbyte_string(result);
|
|
const char *db_string = scsi_driverbyte_string(result);
|
|
|
|
if (hb_string || db_string)
|
|
sd_printk(KERN_INFO, sdkp,
|
|
"%s: Result: hostbyte=%s driverbyte=%s\n", msg,
|
|
hb_string ? hb_string : "invalid",
|
|
db_string ? db_string : "invalid");
|
|
else
|
|
sd_printk(KERN_INFO, sdkp,
|
|
"%s: Result: hostbyte=0x%02x driverbyte=0x%02x\n",
|
|
msg, host_byte(result), driver_byte(result));
|
|
}
|