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[SCSI] ibmvscsi: Add support for capabilities MAD

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Add support to ibmvscsi for the capabilities MAD. This command gets sent
to the Virtual I/O server prior to login in order to communicate client
capabilities. Additionally it returns information regarding capabilities
that the server supports. The two main capabilities communicated in this
MAD are related to partition migration and client reserve. Client reserve
allows for SCSI-2 reservations to be sent to virtual disks which are backed
by physical LUNs and will result in the reservation being sent to the
physical LUN.

Signed-off-by: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
This commit is contained in:
Brian King
2009-06-08 16:19:08 -05:00
committed by James Bottomley
parent c1988e3123
commit 126c5cc37e
3 changed files with 255 additions and 27 deletions
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4
drivers/scsi/ibmvscsi/ibmvscsi.h
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@@ -90,6 +90,7 @@ struct event_pool {
/* all driver data associated with a host adapter */
struct ibmvscsi_host_data {
atomic_t request_limit;
int client_migrated;
struct device *dev;
struct event_pool pool;
struct crq_queue queue;
@@ -97,6 +98,9 @@ struct ibmvscsi_host_data {
struct list_head sent;
struct Scsi_Host *host;
struct mad_adapter_info_data madapter_info;
struct capabilities caps;
dma_addr_t caps_addr;
dma_addr_t adapter_info_addr;
};
/* routines for managing a command/response queue */