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Staging: hv: storvsc: Consolidate all the wire protocol definitions 

Consolidate all definitions that support communication with the host.

Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
K. Y. Srinivasan 2012-01-12 12:38:08 -08:00 committed by Greg Kroah-Hartman
parent 61eaffc91d
commit af9584b82d
1 changed files with 47 additions and 36 deletions
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83
drivers/staging/hv/storvsc_drv.c
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@ -42,33 +42,13 @@
#include <scsi/scsi_devinfo.h>
#include <scsi/scsi_dbg.h>
/*
* We setup a mempool to allocate request structures for this driver
* on a per-lun basis. The following define specifies the number of
* elements in the pool.
* All wire protocol details (storage protocol between the guest and the host)
* are consolidated here.
*
* Begin protocol definitions.
*/
#define STORVSC_MIN_BUF_NR 64
static int storvsc_ringbuffer_size = (20 * PAGE_SIZE);
module_param(storvsc_ringbuffer_size, int, S_IRUGO);
MODULE_PARM_DESC(storvsc_ringbuffer_size, "Ring buffer size (bytes)");
/*
* Major/minor macros. Minor version is in LSB, meaning that earlier flat
* version numbers will be interpreted as "0.x" (i.e., 1 becomes 0.1).
*/
static inline u16 storvsc_get_version(u8 major, u8 minor)
{
u16 version;
version = ((major << 8) | minor);
return version;
}
/*
* Version history:
* V1 Beta: 0.1
@ -207,18 +187,6 @@ struct vstor_packet {
#define REQUEST_COMPLETION_FLAG 0x1
#define STORVSC_MAX_IO_REQUESTS 128
/*
* In Hyper-V, each port/path/target maps to 1 scsi host adapter. In
* reality, the path/target is not used (ie always set to 0) so our
* scsi host adapter essentially has 1 bus with 1 target that contains
* up to 256 luns.
*/
#define STORVSC_MAX_LUNS_PER_TARGET 64
#define STORVSC_MAX_TARGETS 1
#define STORVSC_MAX_CHANNELS 1
/* Matches Windows-end */
enum storvsc_request_type {
WRITE_TYPE = 0,
@ -235,6 +203,36 @@ enum storvsc_request_type {
#define SRB_STATUS_SUCCESS 0x01
#define SRB_STATUS_ERROR 0x04
/*
* This is the end of Protocol specific defines.
*/
/*
* We setup a mempool to allocate request structures for this driver
* on a per-lun basis. The following define specifies the number of
* elements in the pool.
*/
#define STORVSC_MIN_BUF_NR 64
static int storvsc_ringbuffer_size = (20 * PAGE_SIZE);
module_param(storvsc_ringbuffer_size, int, S_IRUGO);
MODULE_PARM_DESC(storvsc_ringbuffer_size, "Ring buffer size (bytes)");
#define STORVSC_MAX_IO_REQUESTS 128
/*
* In Hyper-V, each port/path/target maps to 1 scsi host adapter. In
* reality, the path/target is not used (ie always set to 0) so our
* scsi host adapter essentially has 1 bus with 1 target that contains
* up to 256 luns.
*/
#define STORVSC_MAX_LUNS_PER_TARGET 64
#define STORVSC_MAX_TARGETS 1
#define STORVSC_MAX_CHANNELS 1
struct storvsc_cmd_request {
struct list_head entry;
@ -336,6 +334,19 @@ static void storvsc_remove_lun(struct work_struct *work)
kfree(wrk);
}
/*
* Major/minor macros. Minor version is in LSB, meaning that earlier flat
* version numbers will be interpreted as "0.x" (i.e., 1 becomes 0.1).
*/
static inline u16 storvsc_get_version(u8 major, u8 minor)
{
u16 version;
version = ((major << 8) | minor);
return version;
}
/*
* We can get incoming messages from the host that are not in response to
* messages that we have sent out. An example of this would be messages