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Message-ID: <20140314153622.GA7947@lsi.com>
Date: Fri, 14 Mar 2014 21:06:22 +0530
From: "Reddy, Sreekanth" <Sreekanth.Reddy@....com>
To: <jejb@...nel.org>, <JBottomley@...allels.com>
CC: <linux-scsi@...r.kernel.org>, <Sathya.Prakash@....com>,
<Nagalakshmi.Nandigama@....com>, <sreekanth.reddy@....com>,
<linux-kernel@...r.kernel.org>, <sreekanthreddy0547@...il.com>
Subject: [PATCH 02/11][SCSI]mpt2sas: Added new driver module Parameter
disable_eedp to Disable EEDP Support
A new mpt2sas driver module parameter 'disable_eedp' is added to Disable
EEDP support. By default DIF support is enabled in the driver and
this module parameter would allow users to turn it off.
Signed-off-by: Sreekanth Reddy <Sreekanth.Reddy@....com>
---
drivers/scsi/mpt2sas/mpt2sas_base.c | 9 ++++--
drivers/scsi/mpt2sas/mpt2sas_base.h | 1 +
drivers/scsi/mpt2sas/mpt2sas_scsih.c | 47 +++++++++++++++++++++++-----------
3 files changed, 39 insertions(+), 18 deletions(-)
diff --git a/drivers/scsi/mpt2sas/mpt2sas_base.c b/drivers/scsi/mpt2sas/mpt2sas_base.c
index ed810fb..7355b28 100644
--- a/drivers/scsi/mpt2sas/mpt2sas_base.c
+++ b/drivers/scsi/mpt2sas/mpt2sas_base.c
@@ -440,13 +440,16 @@ _base_sas_ioc_info(struct MPT2SAS_ADAPTER *ioc, MPI2DefaultReply_t *mpi_reply,
****************************************************************************/
case MPI2_IOCSTATUS_EEDP_GUARD_ERROR:
- desc = "eedp guard error";
+ if (!ioc->disable_eedp_support)
+ desc = "eedp guard error";
break;
case MPI2_IOCSTATUS_EEDP_REF_TAG_ERROR:
- desc = "eedp ref tag error";
+ if (!ioc->disable_eedp_support)
+ desc = "eedp ref tag error";
break;
case MPI2_IOCSTATUS_EEDP_APP_TAG_ERROR:
- desc = "eedp app tag error";
+ if (!ioc->disable_eedp_support)
+ desc = "eedp app tag error";
break;
/****************************************************************************
diff --git a/drivers/scsi/mpt2sas/mpt2sas_base.h b/drivers/scsi/mpt2sas/mpt2sas_base.h
index 1f2ac3a..61b02ee 100644
--- a/drivers/scsi/mpt2sas/mpt2sas_base.h
+++ b/drivers/scsi/mpt2sas/mpt2sas_base.h
@@ -842,6 +842,7 @@ struct MPT2SAS_ADAPTER {
u32 ioc_reset_count;
MPT2SAS_FLUSH_RUNNING_CMDS schedule_dead_ioc_flush_running_cmds;
u32 non_operational_loop;
+ u8 disable_eedp_support;
/* internal commands, callback index */
u8 scsi_io_cb_idx;
diff --git a/drivers/scsi/mpt2sas/mpt2sas_scsih.c b/drivers/scsi/mpt2sas/mpt2sas_scsih.c
index 7f0af4f..d502728 100644
--- a/drivers/scsi/mpt2sas/mpt2sas_scsih.c
+++ b/drivers/scsi/mpt2sas/mpt2sas_scsih.c
@@ -127,6 +127,11 @@ static int disable_discovery = -1;
module_param(disable_discovery, int, 0);
MODULE_PARM_DESC(disable_discovery, " disable discovery ");
+/* Enable or disable EEDP support */
+static int disable_eedp;
+module_param(disable_eedp, uint, 0);
+MODULE_PARM_DESC(disable_eedp, " disable EEDP support: (default=0)");
+
/* permit overriding the host protection capabilities mask (EEDP/T10 PI) */
static int prot_mask = 0;
module_param(prot_mask, int, 0);
@@ -4031,7 +4036,8 @@ _scsih_qcmd_lck(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);
+ if (!ioc->disable_eedp_support)
+ _scsih_setup_eedp(scmd, mpi_request);
if (scmd->cmd_len == 32)
mpi_control |= 4 << MPI2_SCSIIO_CONTROL_ADDCDBLEN_SHIFT;
mpi_request->Function = MPI2_FUNCTION_SCSI_IO_REQUEST;
@@ -4196,14 +4202,20 @@ _scsih_scsi_ioc_info(struct MPT2SAS_ADAPTER *ioc, struct scsi_cmnd *scmd,
desc_ioc_state = "scsi ext terminated";
break;
case MPI2_IOCSTATUS_EEDP_GUARD_ERROR:
- desc_ioc_state = "eedp guard error";
- break;
+ if (!ioc->disable_eedp_support) {
+ desc_ioc_state = "eedp guard error";
+ break;
+ }
case MPI2_IOCSTATUS_EEDP_REF_TAG_ERROR:
- desc_ioc_state = "eedp ref tag error";
- break;
+ if (!ioc->disable_eedp_support) {
+ desc_ioc_state = "eedp ref tag error";
+ break;
+ }
case MPI2_IOCSTATUS_EEDP_APP_TAG_ERROR:
- desc_ioc_state = "eedp app tag error";
- break;
+ if (!ioc->disable_eedp_support) {
+ desc_ioc_state = "eedp app tag error";
+ break;
+ }
default:
desc_ioc_state = "unknown";
break;
@@ -4625,8 +4637,10 @@ _scsih_io_done(struct MPT2SAS_ADAPTER *ioc, u16 smid, u8 msix_index, u32 reply)
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;
+ if (!ioc->disable_eedp_support) {
+ _scsih_eedp_error_handling(scmd, ioc_status);
+ break;
+ }
case MPI2_IOCSTATUS_SCSI_PROTOCOL_ERROR:
case MPI2_IOCSTATUS_INVALID_FUNCTION:
case MPI2_IOCSTATUS_INVALID_SGL:
@@ -8213,15 +8227,18 @@ _scsih_probe(struct pci_dev *pdev, const struct pci_device_id *id)
goto out_add_shost_fail;
}
- /* register EEDP capabilities with SCSI layer */
- if (prot_mask)
- scsi_host_set_prot(shost, prot_mask);
- else
- scsi_host_set_prot(shost, SHOST_DIF_TYPE1_PROTECTION
+ ioc->disable_eedp_support = disable_eedp;
+ if (!ioc->disable_eedp_support) {
+ /* register EEDP capabilities with SCSI layer */
+ if (prot_mask)
+ scsi_host_set_prot(shost, prot_mask);
+ else
+ scsi_host_set_prot(shost, SHOST_DIF_TYPE1_PROTECTION
| SHOST_DIF_TYPE2_PROTECTION
| SHOST_DIF_TYPE3_PROTECTION);
- scsi_host_set_guard(shost, SHOST_DIX_GUARD_CRC);
+ scsi_host_set_guard(shost, SHOST_DIX_GUARD_CRC);
+ }
/* event thread */
snprintf(ioc->firmware_event_name, sizeof(ioc->firmware_event_name),
--
1.7.1
--
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