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Commit 852eb1aa authored by Sebastian Ott's avatar Sebastian Ott Committed by Martin Schwidefsky
Browse files

s390/zfcp: use qdio buffer helpers 



Use qdio buffer helpers to manage the buffers used for the request
and response queues.

No functional change.

Reviewed-by: default avatarSteffen Maier <maier@linux.vnet.ibm.com>
Signed-off-by: default avatarSebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
parent d445a4e2

drivers/s390/scsi/zfcp_qdio.c

+21 −28
Original line number Diff line number Diff line
@@ -14,27 +14,10 @@ 
#include "zfcp_ext.h"

#include "zfcp_qdio.h"



#define QBUFF_PER_PAGE		(PAGE_SIZE / sizeof(struct qdio_buffer))



static bool enable_multibuffer = 1;

module_param_named(datarouter, enable_multibuffer, bool, 0400);

MODULE_PARM_DESC(datarouter, "Enable hardware data router support (default on)");



static int zfcp_qdio_buffers_enqueue(struct qdio_buffer **sbal)

{

	int pos;



	for (pos = 0; pos < QDIO_MAX_BUFFERS_PER_Q; pos += QBUFF_PER_PAGE) {

		sbal[pos] = (struct qdio_buffer *) get_zeroed_page(GFP_KERNEL);

		if (!sbal[pos])

			return -ENOMEM;

	}

	for (pos = 0; pos < QDIO_MAX_BUFFERS_PER_Q; pos++)

		if (pos % QBUFF_PER_PAGE)

			sbal[pos] = sbal[pos - 1] + 1;

	return 0;

}



static void zfcp_qdio_handler_error(struct zfcp_qdio *qdio, char *id,

				    unsigned int qdio_err)

{
@@ -326,15 +309,30 @@ static void zfcp_qdio_setup_init_data(struct qdio_initialize *id, 
static int zfcp_qdio_allocate(struct zfcp_qdio *qdio)

{

	struct qdio_initialize init_data;

	int ret;



	if (zfcp_qdio_buffers_enqueue(qdio->req_q) ||

	    zfcp_qdio_buffers_enqueue(qdio->res_q))

	ret = qdio_alloc_buffers(qdio->req_q, QDIO_MAX_BUFFERS_PER_Q);

	if (ret)

		return -ENOMEM;



	ret = qdio_alloc_buffers(qdio->res_q, QDIO_MAX_BUFFERS_PER_Q);

	if (ret)

		goto free_req_q;



	zfcp_qdio_setup_init_data(&init_data, qdio);

	init_waitqueue_head(&qdio->req_q_wq);



	return qdio_allocate(&init_data);

	ret = qdio_allocate(&init_data);

	if (ret)

		goto free_res_q;



	return 0;



free_res_q:

	qdio_free_buffers(qdio->res_q, QDIO_MAX_BUFFERS_PER_Q);

free_req_q:

	qdio_free_buffers(qdio->req_q, QDIO_MAX_BUFFERS_PER_Q);

	return ret;

}



/**
@@ -448,19 +446,14 @@ failed_establish: 


void zfcp_qdio_destroy(struct zfcp_qdio *qdio)

{

	int p;



	if (!qdio)

		return;



	if (qdio->adapter->ccw_device)

		qdio_free(qdio->adapter->ccw_device);



	for (p = 0; p < QDIO_MAX_BUFFERS_PER_Q; p += QBUFF_PER_PAGE) {

		free_page((unsigned long) qdio->req_q[p]);

		free_page((unsigned long) qdio->res_q[p]);

	}



	qdio_free_buffers(qdio->req_q, QDIO_MAX_BUFFERS_PER_Q);

	qdio_free_buffers(qdio->res_q, QDIO_MAX_BUFFERS_PER_Q);

	kfree(qdio);

}
@@ -475,7 +468,7 @@ int zfcp_qdio_setup(struct zfcp_adapter *adapter) 
	qdio->adapter = adapter;



	if (zfcp_qdio_allocate(qdio)) {

		zfcp_qdio_destroy(qdio);

		kfree(qdio);

		return -ENOMEM;

	}