123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210 |
- #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"
- 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));
-
- 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);
- }
- void sd_dif_prepare(struct scsi_cmnd *scmd)
- {
- const int tuple_sz = sizeof(struct t10_pi_tuple);
- struct bio *bio;
- struct scsi_disk *sdkp;
- struct t10_pi_tuple *pi;
- u32 phys, virt;
- sdkp = scsi_disk(scmd->request->rq_disk);
- if (sdkp->protection_type == T10_PI_TYPE3_PROTECTION)
- return;
- phys = scsi_prot_ref_tag(scmd);
- __rq_for_each_bio(bio, scmd->request) {
- struct bio_integrity_payload *bip = bio_integrity(bio);
- struct bio_vec iv;
- struct bvec_iter iter;
- unsigned int j;
-
- if (bip->bip_flags & BIP_MAPPED_INTEGRITY)
- break;
- virt = bip_get_seed(bip) & 0xffffffff;
- bip_for_each_vec(iv, bip, iter) {
- pi = kmap_atomic(iv.bv_page) + iv.bv_offset;
- for (j = 0; j < iv.bv_len; j += tuple_sz, pi++) {
- if (be32_to_cpu(pi->ref_tag) == virt)
- pi->ref_tag = cpu_to_be32(phys);
- virt++;
- phys++;
- }
- kunmap_atomic(pi);
- }
- bip->bip_flags |= BIP_MAPPED_INTEGRITY;
- }
- }
- void sd_dif_complete(struct scsi_cmnd *scmd, unsigned int good_bytes)
- {
- const int tuple_sz = sizeof(struct t10_pi_tuple);
- struct scsi_disk *sdkp;
- struct bio *bio;
- struct t10_pi_tuple *pi;
- unsigned int j, intervals;
- u32 phys, virt;
- sdkp = scsi_disk(scmd->request->rq_disk);
- if (sdkp->protection_type == T10_PI_TYPE3_PROTECTION || good_bytes == 0)
- return;
- intervals = good_bytes / scsi_prot_interval(scmd);
- phys = scsi_prot_ref_tag(scmd);
- __rq_for_each_bio(bio, scmd->request) {
- struct bio_integrity_payload *bip = bio_integrity(bio);
- struct bio_vec iv;
- struct bvec_iter iter;
- virt = bip_get_seed(bip) & 0xffffffff;
- bip_for_each_vec(iv, bip, iter) {
- pi = kmap_atomic(iv.bv_page) + iv.bv_offset;
- for (j = 0; j < iv.bv_len; j += tuple_sz, pi++) {
- if (intervals == 0) {
- kunmap_atomic(pi);
- return;
- }
- if (be32_to_cpu(pi->ref_tag) == phys)
- pi->ref_tag = cpu_to_be32(virt);
- virt++;
- phys++;
- intervals--;
- }
- kunmap_atomic(pi);
- }
- }
- }
|