Contributors: 8
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Martin K. Petersen |
255 |
81.73% |
10 |
37.04% |
| Christoph Hellwig |
18 |
5.77% |
6 |
22.22% |
| Linus Torvalds (pre-git) |
15 |
4.81% |
5 |
18.52% |
| James Bottomley |
11 |
3.53% |
2 |
7.41% |
| Xingui Yang |
8 |
2.56% |
1 |
3.70% |
| Douglas Gilbert |
2 |
0.64% |
1 |
3.70% |
| Thomas Gleixner |
2 |
0.64% |
1 |
3.70% |
| Arjan van de Ven |
1 |
0.32% |
1 |
3.70% |
| Total |
312 |
|
27 |
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* sd_dif.c - SCSI Data Integrity Field
*
* Copyright (C) 2007, 2008 Oracle Corporation
* Written by: Martin K. Petersen <martin.petersen@oracle.com>
*/
#include <linux/blk-integrity.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) {
blk_integrity_unregister(disk);
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);
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_first_printk(KERN_NOTICE, sdkp,
"Enabling DIX %s, application tag size %u bytes\n",
bi.profile->name, bi.tag_size);
out:
blk_integrity_register(disk, &bi);
}