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Commit af9584b8 authored by K. Y. Srinivasan's avatar K. Y. Srinivasan Committed by Greg Kroah-Hartman
Browse files

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



Consolidate all definitions that support communication with the host.

Signed-off-by: default avatarK. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 61eaffc9

drivers/staging/hv/storvsc_drv.c

+47 −36
Original line number Diff line number Diff line
@@ -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.

 */



#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).

 * All wire protocol details (storage protocol between the guest and the host)

 * are consolidated here.

 *

 * Begin protocol definitions.

 */



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 @@ done: 
	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