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Commit 3c621b3e authored by Eric Moore's avatar Eric Moore Committed by James Bottomley
Browse files

[SCSI] mpt2sas: T10 DIF Support 



This add support for type 1 and 3 DIF support per the Oracle API.

Signed-off-by: default avatarEric Moore <eric.moore@lsi.com>
Signed-off-by: default avatarJames Bottomley <James.Bottomley@HansenPartnership.com>
parent 6fcf41d1

drivers/scsi/mpt2sas/mpt2sas_base.h

+1 −0
Original line number Diff line number Diff line
@@ -61,6 +61,7 @@ 
#include <scsi/scsi_tcq.h>

#include <scsi/scsi_transport_sas.h>

#include <scsi/scsi_dbg.h>

#include <scsi/scsi_eh.h>



#include "mpt2sas_debug.h"

drivers/scsi/mpt2sas/mpt2sas_scsih.c

+118 −0
Original line number Diff line number Diff line
@@ -2389,6 +2389,106 @@ mpt2sas_scsih_reset_handler(struct MPT2SAS_ADAPTER *ioc, int reset_phase) 
	}

}



/**

 * _scsih_setup_eedp - setup MPI request for EEDP transfer

 * @scmd: pointer to scsi command object

 * @mpi_request: pointer to the SCSI_IO reqest message frame

 *

 * Supporting protection 1 and 3.

 *

 * Returns nothing

 */

static void

_scsih_setup_eedp(struct scsi_cmnd *scmd, Mpi2SCSIIORequest_t *mpi_request)

{

	u16 eedp_flags;

	unsigned char prot_op = scsi_get_prot_op(scmd);

	unsigned char prot_type = scsi_get_prot_type(scmd);



	if (prot_type == SCSI_PROT_DIF_TYPE0 ||

	   prot_type == SCSI_PROT_DIF_TYPE2 ||

	   prot_op == SCSI_PROT_NORMAL)

		return;



	if (prot_op ==  SCSI_PROT_READ_STRIP)

		eedp_flags = MPI2_SCSIIO_EEDPFLAGS_CHECK_REMOVE_OP;

	else if (prot_op ==  SCSI_PROT_WRITE_INSERT)

		eedp_flags = MPI2_SCSIIO_EEDPFLAGS_INSERT_OP;

	else

		return;



	mpi_request->EEDPBlockSize = scmd->device->sector_size;



	switch (prot_type) {

	case SCSI_PROT_DIF_TYPE1:



		/*

		* enable ref/guard checking

		* auto increment ref tag

		*/

		mpi_request->EEDPFlags = eedp_flags |

		    MPI2_SCSIIO_EEDPFLAGS_INC_PRI_REFTAG |

		    MPI2_SCSIIO_EEDPFLAGS_CHECK_REFTAG |

		    MPI2_SCSIIO_EEDPFLAGS_CHECK_GUARD;

		mpi_request->CDB.EEDP32.PrimaryReferenceTag =

		    cpu_to_be32(scsi_get_lba(scmd));



		break;



	case SCSI_PROT_DIF_TYPE3:



		/*

		* enable guard checking

		*/

		mpi_request->EEDPFlags = eedp_flags |

		    MPI2_SCSIIO_EEDPFLAGS_CHECK_GUARD;



		break;

	}

}



/**

 * _scsih_eedp_error_handling - return sense code for EEDP errors

 * @scmd: pointer to scsi command object

 * @ioc_status: ioc status

 *

 * Returns nothing

 */

static void

_scsih_eedp_error_handling(struct scsi_cmnd *scmd, u16 ioc_status)

{

	u8 ascq;

	u8 sk;

	u8 host_byte;



	switch (ioc_status) {

	case MPI2_IOCSTATUS_EEDP_GUARD_ERROR:

		ascq = 0x01;

		break;

	case MPI2_IOCSTATUS_EEDP_APP_TAG_ERROR:

		ascq = 0x02;

		break;

	case MPI2_IOCSTATUS_EEDP_REF_TAG_ERROR:

		ascq = 0x03;

		break;

	default:

		ascq = 0x00;

		break;

	}



	if (scmd->sc_data_direction == DMA_TO_DEVICE) {

		sk = ILLEGAL_REQUEST;

		host_byte = DID_ABORT;

	} else {

		sk = ABORTED_COMMAND;

		host_byte = DID_OK;

	}



	scsi_build_sense_buffer(0, scmd->sense_buffer, sk, 0x10, ascq);

	scmd->result = DRIVER_SENSE << 24 | (host_byte << 16) |

	    SAM_STAT_CHECK_CONDITION;

}



/**

 * scsih_qcmd - main scsi request entry point

 * @scmd: pointer to scsi command object
@@ -2470,6 +2570,7 @@ scsih_qcmd(struct scsi_cmnd *scmd, void (*done)(struct scsi_cmnd *)) 
	}

	mpi_request = mpt2sas_base_get_msg_frame(ioc, smid);

	memset(mpi_request, 0, sizeof(Mpi2SCSIIORequest_t));

	_scsih_setup_eedp(scmd, mpi_request);

	mpi_request->Function = MPI2_FUNCTION_SCSI_IO_REQUEST;

	if (sas_device_priv_data->sas_target->flags &

	    MPT_TARGET_FLAGS_RAID_COMPONENT)
@@ -2604,6 +2705,15 @@ _scsih_scsi_ioc_info(struct MPT2SAS_ADAPTER *ioc, struct scsi_cmnd *scmd, 
	case MPI2_IOCSTATUS_SCSI_EXT_TERMINATED:

		desc_ioc_state = "scsi ext terminated";

		break;

	case MPI2_IOCSTATUS_EEDP_GUARD_ERROR:

		desc_ioc_state = "eedp guard error";

		break;

	case MPI2_IOCSTATUS_EEDP_REF_TAG_ERROR:

		desc_ioc_state = "eedp ref tag error";

		break;

	case MPI2_IOCSTATUS_EEDP_APP_TAG_ERROR:

		desc_ioc_state = "eedp app tag error";

		break;

	default:

		desc_ioc_state = "unknown";

		break;
@@ -2939,6 +3049,11 @@ scsih_io_done(struct MPT2SAS_ADAPTER *ioc, u16 smid, u8 VF_ID, u32 reply) 
			scmd->result = DID_RESET << 16;

		break;



	case MPI2_IOCSTATUS_EEDP_GUARD_ERROR:

	case MPI2_IOCSTATUS_EEDP_REF_TAG_ERROR:

	case MPI2_IOCSTATUS_EEDP_APP_TAG_ERROR:

		_scsih_eedp_error_handling(scmd, ioc_status);

		break;

	case MPI2_IOCSTATUS_SCSI_PROTOCOL_ERROR:

	case MPI2_IOCSTATUS_INVALID_FUNCTION:

	case MPI2_IOCSTATUS_INVALID_SGL:
@@ -5503,6 +5618,9 @@ scsih_probe(struct pci_dev *pdev, const struct pci_device_id *id) 
		goto out_add_shost_fail;

	}



	scsi_host_set_prot(shost, SHOST_DIF_TYPE1_PROTECTION

	    | SHOST_DIF_TYPE3_PROTECTION);



	/* event thread */

	snprintf(ioc->firmware_event_name, sizeof(ioc->firmware_event_name),

	    "fw_event%d", ioc->id);