megaraid_sas: add support for secure JBOD

This patch adds support for Secure Encrypting Drives (SED) in JBOD mode:

1) If the firmware supports SED JBOD, all non read/write commands to JBODs
   will be sent via firmware path, and read/write commands to JBODs will
   be sent via fastpath.
2) If the firmware does not support SED JBOD, driver will fall back to the
   old design, i.e. send all JBOD I/O via fastpath.

Signed-off-by: Sumit Saxena <sumit.saxena@avagotech.com>
Signed-off-by: Chaitra Basappa <chaitra.basappa@avagotech.com>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>

1 files changed, 41 insertions, 32 deletions

diff --git a/drivers/scsi/megaraid/megaraid_sas_fusion.c b/drivers/scsi/megaraid/megaraid_sas_fusion.c
index b5362c196000..af5ab9e5e8e5 100644
--- a/drivers/scsi/megaraid/megaraid_sas_fusion.c
+++ b/drivers/scsi/megaraid/megaraid_sas_fusion.c
@@ -63,7 +63,6 @@ extern struct megasas_cmd *megasas_get_cmd(struct megasas_instance
 extern void
 megasas_complete_cmd(struct megasas_instance *instance,
 		     struct megasas_cmd *cmd, u8 alt_status);
-int megasas_is_ldio(struct scsi_cmnd *cmd);
 int
 wait_and_poll(struct megasas_instance *instance, struct megasas_cmd *cmd,
 	      int seconds);
@@ -196,6 +195,7 @@ inline void megasas_return_cmd_fusion(struct megasas_instance *instance,
 
 	cmd->scmd = NULL;
 	cmd->sync_cmd_idx = (u32)ULONG_MAX;
+	memset(cmd->io_request, 0, sizeof(struct MPI2_RAID_SCSI_IO_REQUEST));
 	list_add(&cmd->list, (&fusion->cmd_pool)->next);
 
 	spin_unlock_irqrestore(&fusion->mpt_pool_lock, flags);
@@ -689,6 +689,8 @@ megasas_ioc_init_fusion(struct megasas_instance *instance)
 		= 1;
 	init_frame->driver_operations.mfi_capabilities.support_ndrive_r1_lb
 		= 1;
+	init_frame->driver_operations.mfi_capabilities.security_protocol_cmds_fw
+		= 1;
 	/* Convert capability to LE32 */
 	cpu_to_le32s((u32 *)&init_frame->driver_operations.mfi_capabilities);
 
@@ -1284,6 +1286,7 @@ megasas_make_sgl_fusion(struct megasas_instance *instance,
 
 			sgl_ptr =
 			  (struct MPI25_IEEE_SGE_CHAIN64 *)cmd->sg_frame;
+			memset(sgl_ptr, 0, MEGASAS_MAX_SZ_CHAIN_FRAME);
 		}
 	}
 
@@ -1657,6 +1660,8 @@ megasas_build_dcdb_fusion(struct megasas_instance *instance,
 	u32 device_id;
 	struct MPI2_RAID_SCSI_IO_REQUEST *io_request;
 	u16 pd_index = 0;
+	u16 os_timeout_value;
+	u16 timeout_limit;
 	struct MR_DRV_RAID_MAP_ALL *local_map_ptr;
 	struct fusion_context *fusion = instance->ctrl_context;
 	u8                          span, physArm;
@@ -1673,44 +1678,48 @@ megasas_build_dcdb_fusion(struct megasas_instance *instance,
 
 	io_request->DataLength = cpu_to_le32(scsi_bufflen(scmd));
 
-
-	/* Check if this is a system PD I/O */
 	if (scmd->device->channel < MEGASAS_MAX_PD_CHANNELS &&
 	    instance->pd_list[pd_index].driveState == MR_PD_STATE_SYSTEM) {
-		io_request->Function = 0;
 		if (fusion->fast_path_io)
 			io_request->DevHandle =
 			local_map_ptr->raidMap.devHndlInfo[device_id].curDevHdl;
-		io_request->RaidContext.timeoutValue =
-			local_map_ptr->raidMap.fpPdIoTimeoutSec;
-		io_request->RaidContext.regLockFlags = 0;
-		io_request->RaidContext.regLockRowLBA = 0;
-		io_request->RaidContext.regLockLength = 0;
 		io_request->RaidContext.RAIDFlags =
-			MR_RAID_FLAGS_IO_SUB_TYPE_SYSTEM_PD <<
-			MR_RAID_CTX_RAID_FLAGS_IO_SUB_TYPE_SHIFT;
-		if ((instance->pdev->device == PCI_DEVICE_ID_LSI_INVADER) ||
-			(instance->pdev->device == PCI_DEVICE_ID_LSI_FURY))
-			io_request->IoFlags |= cpu_to_le16(
-				MPI25_SAS_DEVICE0_FLAGS_ENABLED_FAST_PATH);
-		cmd->request_desc->SCSIIO.RequestFlags =
-			(MPI2_REQ_DESCRIPT_FLAGS_HIGH_PRIORITY <<
-			 MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
-		cmd->request_desc->SCSIIO.DevHandle =
-			local_map_ptr->raidMap.devHndlInfo[device_id].curDevHdl;
+			MR_RAID_FLAGS_IO_SUB_TYPE_SYSTEM_PD
+			<< MR_RAID_CTX_RAID_FLAGS_IO_SUB_TYPE_SHIFT;
+		cmd->request_desc->SCSIIO.DevHandle = io_request->DevHandle;
 		cmd->request_desc->SCSIIO.MSIxIndex =
 			instance->msix_vectors ? smp_processor_id() % instance->msix_vectors : 0;
-		/*
-		 * If the command is for the tape device, set the
-		 * FP timeout to the os layer timeout value.
-		 */
-		if (scmd->device->type == TYPE_TAPE) {
-			if ((scmd->request->timeout / HZ) > 0xFFFF)
-				io_request->RaidContext.timeoutValue =
-					0xFFFF;
-			else
-				io_request->RaidContext.timeoutValue =
-					scmd->request->timeout / HZ;
+		os_timeout_value = scmd->request->timeout / HZ;
+
+		if (instance->secure_jbod_support &&
+			(megasas_cmd_type(scmd) == NON_READ_WRITE_SYSPDIO)) {
+			/* system pd firmware path */
+			io_request->Function  =
+				MEGASAS_MPI2_FUNCTION_LD_IO_REQUEST;
+			cmd->request_desc->SCSIIO.RequestFlags =
+				(MPI2_REQ_DESCRIPT_FLAGS_SCSI_IO <<
+				MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
+			io_request->RaidContext.timeoutValue =
+				cpu_to_le16(os_timeout_value);
+		} else {
+			/* system pd Fast Path */
+			io_request->Function = MPI2_FUNCTION_SCSI_IO_REQUEST;
+			io_request->RaidContext.regLockFlags = 0;
+			io_request->RaidContext.regLockRowLBA = 0;
+			io_request->RaidContext.regLockLength = 0;
+			timeout_limit = (scmd->device->type == TYPE_DISK) ?
+					255 : 0xFFFF;
+			io_request->RaidContext.timeoutValue =
+				cpu_to_le16((os_timeout_value > timeout_limit) ?
+				timeout_limit : os_timeout_value);
+		if ((instance->pdev->device == PCI_DEVICE_ID_LSI_INVADER) ||
+			(instance->pdev->device == PCI_DEVICE_ID_LSI_FURY))
+			io_request->IoFlags |=
+			cpu_to_le16(MPI25_SAS_DEVICE0_FLAGS_ENABLED_FAST_PATH);
+
+			cmd->request_desc->SCSIIO.RequestFlags =
+				(MPI2_REQ_DESCRIPT_FLAGS_HIGH_PRIORITY <<
+				MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
 		}
 	} else {
 		if (scmd->device->channel < MEGASAS_MAX_PD_CHANNELS)
@@ -1810,7 +1819,7 @@ megasas_build_io_fusion(struct megasas_instance *instance,
 	 */
 	io_request->IoFlags = cpu_to_le16(scp->cmd_len);
 
-	if (megasas_is_ldio(scp))
+	if (megasas_cmd_type(scp) == READ_WRITE_LDIO)
 		megasas_build_ldio_fusion(instance, scp, cmd);
 	else
 		megasas_build_dcdb_fusion(instance, scp, cmd);