mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-28 11:05:18 +07:00
10c41ddd61
Currently these functions are implemented in the scsi layer, but their actual place should be the block layer since T10-PI is a general data integrity feature that is used in the nvme protocol as well. Also, use the tuple size from the integrity profile since it may vary between integrity types. Suggested-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Max Gurtovoy <maxg@mellanox.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
98 lines
2.5 KiB
C
98 lines
2.5 KiB
C
/*
|
|
* sd_dif.c - SCSI Data Integrity Field
|
|
*
|
|
* Copyright (C) 2007, 2008 Oracle Corporation
|
|
* Written by: Martin K. Petersen <martin.petersen@oracle.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License version
|
|
* 2 as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it will be useful, but
|
|
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; see the file COPYING. If not, write to
|
|
* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139,
|
|
* USA.
|
|
*
|
|
*/
|
|
|
|
#include <linux/blkdev.h>
|
|
#include <linux/t10-pi.h>
|
|
|
|
#include <scsi/scsi.h>
|
|
#include <scsi/scsi_cmnd.h>
|
|
#include <scsi/scsi_dbg.h>
|
|
#include <scsi/scsi_device.h>
|
|
#include <scsi/scsi_driver.h>
|
|
#include <scsi/scsi_eh.h>
|
|
#include <scsi/scsi_host.h>
|
|
#include <scsi/scsi_ioctl.h>
|
|
#include <scsi/scsicam.h>
|
|
|
|
#include "sd.h"
|
|
|
|
/*
|
|
* Configure exchange of protection information between OS and HBA.
|
|
*/
|
|
void sd_dif_config_host(struct scsi_disk *sdkp)
|
|
{
|
|
struct scsi_device *sdp = sdkp->device;
|
|
struct gendisk *disk = sdkp->disk;
|
|
u8 type = sdkp->protection_type;
|
|
struct blk_integrity bi;
|
|
int dif, dix;
|
|
|
|
dif = scsi_host_dif_capable(sdp->host, type);
|
|
dix = scsi_host_dix_capable(sdp->host, type);
|
|
|
|
if (!dix && scsi_host_dix_capable(sdp->host, 0)) {
|
|
dif = 0; dix = 1;
|
|
}
|
|
|
|
if (!dix)
|
|
return;
|
|
|
|
memset(&bi, 0, sizeof(bi));
|
|
|
|
/* Enable DMA of protection information */
|
|
if (scsi_host_get_guard(sdkp->device->host) & SHOST_DIX_GUARD_IP) {
|
|
if (type == T10_PI_TYPE3_PROTECTION)
|
|
bi.profile = &t10_pi_type3_ip;
|
|
else
|
|
bi.profile = &t10_pi_type1_ip;
|
|
|
|
bi.flags |= BLK_INTEGRITY_IP_CHECKSUM;
|
|
} else
|
|
if (type == T10_PI_TYPE3_PROTECTION)
|
|
bi.profile = &t10_pi_type3_crc;
|
|
else
|
|
bi.profile = &t10_pi_type1_crc;
|
|
|
|
bi.tuple_size = sizeof(struct t10_pi_tuple);
|
|
sd_printk(KERN_NOTICE, sdkp,
|
|
"Enabling DIX %s protection\n", bi.profile->name);
|
|
|
|
if (dif && type) {
|
|
bi.flags |= BLK_INTEGRITY_DEVICE_CAPABLE;
|
|
|
|
if (!sdkp->ATO)
|
|
goto out;
|
|
|
|
if (type == T10_PI_TYPE3_PROTECTION)
|
|
bi.tag_size = sizeof(u16) + sizeof(u32);
|
|
else
|
|
bi.tag_size = sizeof(u16);
|
|
|
|
sd_printk(KERN_NOTICE, sdkp, "DIF application tag size %u\n",
|
|
bi.tag_size);
|
|
}
|
|
|
|
out:
|
|
blk_integrity_register(disk, &bi);
|
|
}
|
|
|