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Commit 61eaffc9 authored by K. Y. Srinivasan's avatar K. Y. Srinivasan Committed by Greg Kroah-Hartman
Browse files

Staging: hv: storvsc: Consolidate the request structure 



Consolidate the request structure by getting rid of struct hv_storvsc_request.

Signed-off-by: default avatarK. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 410c52ed

drivers/staging/hv/storvsc_drv.c

+27 −38
Original line number Diff line number Diff line
@@ -236,17 +236,20 @@ enum storvsc_request_type { 
#define SRB_STATUS_ERROR	0x04





struct storvsc_cmd_request {

	struct list_head entry;

	struct scsi_cmnd *cmd;



	unsigned int bounce_sgl_count;

	struct scatterlist *bounce_sgl;



struct hv_storvsc_request {

	struct hv_device *device;



	/* Synchronize the request/response if needed */

	struct completion wait_event;



	unsigned char *sense_buffer;

	struct storvsc_cmd_request  *cmd;

	struct hv_multipage_buffer data_buffer;



	struct vstor_packet vstor_packet;

};
@@ -272,8 +275,8 @@ struct storvsc_device { 
	unsigned char target_id;



	/* Used for vsc/vsp channel reset process */

	struct hv_storvsc_request init_request;

	struct hv_storvsc_request reset_request;

	struct storvsc_cmd_request init_request;

	struct storvsc_cmd_request reset_request;

};



struct stor_mem_pools {
@@ -288,16 +291,6 @@ struct hv_host_device { 
	unsigned char target;

};



struct storvsc_cmd_request {

	struct list_head entry;

	struct scsi_cmnd *cmd;



	unsigned int bounce_sgl_count;

	struct scatterlist *bounce_sgl;



	struct hv_storvsc_request request;

};



struct storvsc_scan_work {

	struct work_struct work;

	struct Scsi_Host *host;
@@ -628,7 +621,7 @@ static unsigned int copy_to_bounce_buffer(struct scatterlist *orig_sgl, 
static int storvsc_channel_init(struct hv_device *device)

{

	struct storvsc_device *stor_device;

	struct hv_storvsc_request *request;

	struct storvsc_cmd_request *request;

	struct vstor_packet *vstor_packet;

	int ret, t;
@@ -643,7 +636,7 @@ static int storvsc_channel_init(struct hv_device *device) 
	 * Now, initiate the vsc/vsp initialization protocol on the open

	 * channel

	 */

	memset(request, 0, sizeof(struct hv_storvsc_request));

	memset(request, 0, sizeof(struct storvsc_cmd_request));

	init_completion(&request->wait_event);

	vstor_packet->operation = VSTOR_OPERATION_BEGIN_INITIALIZATION;

	vstor_packet->flags = REQUEST_COMPLETION_FLAG;
@@ -757,9 +750,8 @@ cleanup: 
}





static void storvsc_command_completion(struct hv_storvsc_request *request)

static void storvsc_command_completion(struct storvsc_cmd_request *cmd_request)

{

	struct storvsc_cmd_request *cmd_request = request->cmd;

	struct scsi_cmnd *scmnd = cmd_request->cmd;

	struct hv_host_device *host_dev = shost_priv(scmnd->device->host);

	void (*scsi_done_fn)(struct scsi_cmnd *);
@@ -768,7 +760,7 @@ static void storvsc_command_completion(struct hv_storvsc_request *request) 
	struct storvsc_scan_work *wrk;

	struct stor_mem_pools *memp = scmnd->device->hostdata;



	vm_srb = &request->vstor_packet.vm_srb;

	vm_srb = &cmd_request->vstor_packet.vm_srb;

	if (cmd_request->bounce_sgl_count) {

		if (vm_srb->data_in == READ_TYPE)

			copy_from_bounce_buffer(scsi_sglist(scmnd),
@@ -819,7 +811,7 @@ static void storvsc_command_completion(struct hv_storvsc_request *request) 
	}



	scsi_set_resid(scmnd,

		request->data_buffer.len -

		cmd_request->data_buffer.len -

		vm_srb->data_transfer_length);



	scsi_done_fn = scmnd->scsi_done;
@@ -834,7 +826,7 @@ static void storvsc_command_completion(struct hv_storvsc_request *request) 


static void storvsc_on_io_completion(struct hv_device *device,

				  struct vstor_packet *vstor_packet,

				  struct hv_storvsc_request *request)

				  struct storvsc_cmd_request *request)

{

	struct storvsc_device *stor_device;

	struct vstor_packet *stor_pkt;
@@ -906,7 +898,7 @@ static void storvsc_on_io_completion(struct hv_device *device, 


static void storvsc_on_receive(struct hv_device *device,

			     struct vstor_packet *vstor_packet,

			     struct hv_storvsc_request *request)

			     struct storvsc_cmd_request *request)

{

	struct storvsc_scan_work *work;

	struct storvsc_device *stor_device;
@@ -940,7 +932,7 @@ static void storvsc_on_channel_callback(void *context) 
	u32 bytes_recvd;

	u64 request_id;

	unsigned char packet[ALIGN(sizeof(struct vstor_packet), 8)];

	struct hv_storvsc_request *request;

	struct storvsc_cmd_request *request;

	int ret;
@@ -954,7 +946,7 @@ static void storvsc_on_channel_callback(void *context) 
				       &bytes_recvd, &request_id);

		if (ret == 0 && bytes_recvd > 0) {



			request = (struct hv_storvsc_request *)

			request = (struct storvsc_cmd_request *)

					(unsigned long)request_id;



			if ((request == &stor_device->init_request) ||
@@ -1036,7 +1028,7 @@ static int storvsc_dev_remove(struct hv_device *device) 
}



static int storvsc_do_io(struct hv_device *device,

			      struct hv_storvsc_request *request)

			      struct storvsc_cmd_request *request)

{

	struct storvsc_device *stor_device;

	struct vstor_packet *vstor_packet;
@@ -1174,7 +1166,7 @@ static int storvsc_host_reset_handler(struct scsi_cmnd *scmnd) 
	struct hv_device *device = host_dev->dev;



	struct storvsc_device *stor_device;

	struct hv_storvsc_request *request;

	struct storvsc_cmd_request *request;

	struct vstor_packet *vstor_packet;

	int ret, t;
@@ -1238,7 +1230,6 @@ static int storvsc_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *scmnd) 
	int ret;

	struct hv_host_device *host_dev = shost_priv(host);

	struct hv_device *dev = host_dev->dev;

	struct hv_storvsc_request *request;

	struct storvsc_cmd_request *cmd_request;

	unsigned int request_size = 0;

	int i;
@@ -1271,8 +1262,7 @@ static int storvsc_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *scmnd) 


	scmnd->host_scribble = (unsigned char *)cmd_request;



	request = &cmd_request->request;

	vm_srb = &request->vstor_packet.vm_srb;

	vm_srb = &cmd_request->vstor_packet.vm_srb;





	/* Build the SRB */
@@ -1288,7 +1278,6 @@ static int storvsc_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *scmnd) 
		break;

	}



	request->cmd = cmd_request;



	vm_srb->port_number = host_dev->port;

	vm_srb->path_id = scmnd->device->channel;
@@ -1299,10 +1288,10 @@ static int storvsc_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *scmnd) 


	memcpy(vm_srb->cdb, scmnd->cmnd, vm_srb->cdb_length);



	request->sense_buffer = scmnd->sense_buffer;

	cmd_request->sense_buffer = scmnd->sense_buffer;





	request->data_buffer.len = scsi_bufflen(scmnd);

	cmd_request->data_buffer.len = scsi_bufflen(scmnd);

	if (scsi_sg_count(scmnd)) {

		sgl = (struct scatterlist *)scsi_sglist(scmnd);

		sg_count = scsi_sg_count(scmnd);
@@ -1331,21 +1320,21 @@ static int storvsc_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *scmnd) 
			sg_count = cmd_request->bounce_sgl_count;

		}



		request->data_buffer.offset = sgl[0].offset;

		cmd_request->data_buffer.offset = sgl[0].offset;



		for (i = 0; i < sg_count; i++)

			request->data_buffer.pfn_array[i] =

			cmd_request->data_buffer.pfn_array[i] =

				page_to_pfn(sg_page((&sgl[i])));



	} else if (scsi_sglist(scmnd)) {

		request->data_buffer.offset =

		cmd_request->data_buffer.offset =

			virt_to_phys(scsi_sglist(scmnd)) & (PAGE_SIZE-1);

		request->data_buffer.pfn_array[0] =

		cmd_request->data_buffer.pfn_array[0] =

			virt_to_phys(scsi_sglist(scmnd)) >> PAGE_SHIFT;

	}



	/* Invokes the vsc to start an IO */

	ret = storvsc_do_io(dev, &cmd_request->request);

	ret = storvsc_do_io(dev, cmd_request);



	if (ret == -EAGAIN) {

		/* no more space */