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megaraid_sas : Support for Avago's Single server High Availability product

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This patch will add support for Single Server High Availability(SSHA) cluster
support.  Here is the short decsription of changes done to add support for
SSHA-

1) Host will send system's Unique ID based on DMI_PRODUCT_UUID to firmware.
2) Toggle the devhandle in LDIO path for Remote LDs.

Signed-off-by: Kashyap Desai <kashyap.desai@avagotech.com>
Signed-off-by: Sumit Saxena <sumit.saxena@avagotech.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Tomas Henzl <thenzl@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: James Bottomley <JBottomley@Odin.com>
This commit is contained in:
Sumit.Saxena@avagotech.com
2015-04-23 16:32:09 +05:30
committed by James Bottomley
parent 09fced1917
commit 5765c5b8b3
3 changed files with 49 additions and 3 deletions
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20
drivers/scsi/megaraid/megaraid_sas_fusion.c
View File

@@ -53,6 +53,7 @@
#include <scsi/scsi_device.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_dbg.h>
#include <linux/dmi.h>
#include "megaraid_sas_fusion.h"
#include "megaraid_sas.h"
@@ -579,6 +580,7 @@ megasas_ioc_init_fusion(struct megasas_instance *instance)
union MEGASAS_REQUEST_DESCRIPTOR_UNION req_desc;
int i;
struct megasas_header *frame_hdr;
const char *sys_info;
fusion = instance->ctrl_context;
@@ -641,6 +643,16 @@ megasas_ioc_init_fusion(struct megasas_instance *instance)
/* Convert capability to LE32 */
cpu_to_le32s((u32 *)&init_frame->driver_operations.mfi_capabilities);
sys_info = dmi_get_system_info(DMI_PRODUCT_UUID);
if (instance->system_info_buf && sys_info) {
memcpy(instance->system_info_buf->systemId, sys_info,
strlen(sys_info) > 64 ? 64 : strlen(sys_info));
instance->system_info_buf->systemIdLength =
strlen(sys_info) > 64 ? 64 : strlen(sys_info);
init_frame->system_info_lo = instance->system_info_h;
init_frame->system_info_hi = 0;
}
init_frame->queue_info_new_phys_addr_hi =
cpu_to_le32(upper_32_bits(ioc_init_handle));
init_frame->queue_info_new_phys_addr_lo =
@@ -1572,6 +1584,14 @@ megasas_build_ldio_fusion(struct megasas_instance *instance,
cmd->pd_r1_lb = io_info.pd_after_lb;
} else
scp->SCp.Status &= ~MEGASAS_LOAD_BALANCE_FLAG;
if ((raidLUN[0] == 1) &&
(local_map_ptr->raidMap.devHndlInfo[io_info.pd_after_lb].validHandles > 2)) {
instance->dev_handle = !(instance->dev_handle);
io_info.devHandle =
local_map_ptr->raidMap.devHndlInfo[io_info.pd_after_lb].devHandle[instance->dev_handle];
}
cmd->request_desc->SCSIIO.DevHandle = io_info.devHandle;
io_request->DevHandle = io_info.devHandle;
/* populate the LUN field */