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From cf10a0af2c72e9972fa436aa6c2420a00ac69e46 Mon Sep 17 00:00:00 2001
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From: Suganath Prabu Subramani <suganath-prabu.subramani@broadcom.com>
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Date: Wed, 26 Oct 2016 13:34:39 +0530
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Subject: [PATCH 08/11] scsi: mpt3sas: set EEDP-escape-flags for SAS35 devices.
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An UNMAP command on a PI formatted device will leave the Logical Block
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Application Tag and Logical Block Reference Tag as all F's (for those LBAs
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that are unmapped). To avoid IO errors if those LBAs are subsequently read
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before they are written with valid tag fields, the MPI SCSI IO requests
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need to set the EEDPFlags element EEDP Escape Mode field, Bits [7:6]
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appropriately. A value of 2 should be set to disable all PI checks if the
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Logical Block Application Tag is 0xFFFF for PI types 1 and 2. A value
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of 3 should be set to disable all PI checks if the Logical Block
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Application Tag is 0xFFFF and the Logical Block Reference Tag is
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0xFFFFFFFF for PI type 3.
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Signed-off-by: Chaitra P B <chaitra.basappa@broadcom.com>
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Signed-off-by: Sathya Prakash <sathya.prakash@broadcom.com>
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Signed-off-by: Suganath Prabu S <suganath-prabu.subramani@broadcom.com>
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Reviewed-by: Hannes Reinecke <hare@suse.com>
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Reviewed-by: Tomas Henzl <thenzl@redhat.com>
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Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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---
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drivers/scsi/mpt3sas/mpt3sas_scsih.c | 3 +++
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1 file changed, 3 insertions(+)
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diff --git a/drivers/scsi/mpt3sas/mpt3sas_scsih.c b/drivers/scsi/mpt3sas/mpt3sas_scsih.c
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index 980c69d..0ff2ed3 100644
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--- a/drivers/scsi/mpt3sas/mpt3sas_scsih.c
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+++ b/drivers/scsi/mpt3sas/mpt3sas_scsih.c
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@@ -4040,6 +4040,9 @@ _scsih_setup_eedp(struct MPT3SAS_ADAPTER *ioc, struct scsi_cmnd *scmd,
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mpi_request_3v->EEDPBlockSize =
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cpu_to_le16(scmd->device->sector_size);
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+
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+ if (ioc->is_gen35_ioc)
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+ eedp_flags |= MPI25_SCSIIO_EEDPFLAGS_APPTAG_DISABLE_MODE;
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mpi_request->EEDPFlags = cpu_to_le16(eedp_flags);
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}
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--
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1.8.3.1
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