static inline int
qla24xx_configure_prot_mode(srb_t *sp, uint16_t *fw_prot_opts)
{
struct scsi_cmnd *cmd = GET_CMD_SP(sp);
uint8_t guard = scsi_host_get_guard(cmd->device->host);
/* We only support T10 DIF right now */
if (guard != SHOST_DIX_GUARD_CRC) {
ql_dbg(ql_dbg_io, sp->fcport->vha, 0x3007,
"Unsupported guard: %d for cmd=%p.\n", guard, cmd);
return 0;
}
/* We always use DIFF Bundling for best performance */
*fw_prot_opts = 0;
/* Translate SCSI opcode to a protection opcode */
switch (scsi_get_prot_op(cmd)) {
case SCSI_PROT_READ_STRIP:
*fw_prot_opts |= PO_MODE_DIF_REMOVE;
break;
case SCSI_PROT_WRITE_INSERT:
*fw_prot_opts |= PO_MODE_DIF_INSERT;
break;
case SCSI_PROT_READ_INSERT:
*fw_prot_opts |= PO_MODE_DIF_INSERT;
break;
case SCSI_PROT_WRITE_STRIP:
*fw_prot_opts |= PO_MODE_DIF_REMOVE;
break;
case SCSI_PROT_READ_PASS:
*fw_prot_opts |= PO_MODE_DIF_PASS;
break;
case SCSI_PROT_WRITE_PASS:
*fw_prot_opts |= PO_MODE_DIF_PASS;
break;
default: /* Normal Request */
*fw_prot_opts |= PO_MODE_DIF_PASS;
break;
}
return scsi_prot_sg_count(cmd);
}
/*
* 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;
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;
/* Enable DMA of protection information */
if (scsi_host_get_guard(sdkp->device->host) & SHOST_DIX_GUARD_IP)
if (type == SD_DIF_TYPE3_PROTECTION)
blk_integrity_register(disk, &dif_type3_integrity_ip);
else
blk_integrity_register(disk, &dif_type1_integrity_ip);
else
if (type == SD_DIF_TYPE3_PROTECTION)
blk_integrity_register(disk, &dif_type3_integrity_crc);
else
blk_integrity_register(disk, &dif_type1_integrity_crc);
sd_printk(KERN_NOTICE, sdkp,
"Enabling DIX %s protection\n", disk->integrity->name);
/* Signal to block layer that we support sector tagging */
if (dif && type && sdkp->ATO) {
if (type == SD_DIF_TYPE3_PROTECTION)
disk->integrity->tag_size = sizeof(u16) + sizeof(u32);
else
disk->integrity->tag_size = sizeof(u16);
sd_printk(KERN_NOTICE, sdkp, "DIF application tag size %u\n",
disk->integrity->tag_size);
}
}
