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Staging: hv: ring parameter 

The ring size parameter should be number of pages (not bytes).
Add module parameter information as well.

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Acked-by: Hank Janssen <hjanssen@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Stephen Hemminger 2010-05-04 09:58:53 -07:00 committed by Greg Kroah-Hartman
parent 7880fc54c9
commit 450d7a4b7a
2 changed files with 6 additions and 4 deletions
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1
drivers/staging/hv/NetVscApi.h
View File

@ -28,7 +28,6 @@
#include "VmbusApi.h"
/* Defines */
#define NETVSC_DEVICE_RING_BUFFER_SIZE (64*PAGE_SIZE)
#define HW_MACADDR_LEN 6
/* Fwd declaration */

9
drivers/staging/hv/netvsc_drv.c
View File

@ -52,7 +52,11 @@ struct netvsc_driver_context {
struct netvsc_driver drv_obj;
};
static int netvsc_ringbuffer_size = NETVSC_DEVICE_RING_BUFFER_SIZE;
/* Need at least MAX_SKB_FRAGS (18) + 1
to handle worst case fragmented packet */
static int ring_size = roundup_pow_of_two(2*MAX_SKB_FRAGS+1);
module_param(ring_size, int, S_IRUGO);
MODULE_PARM_DESC(ring_size, "Ring buffer size (# of pages)");
/* The one and only one */
static struct netvsc_driver_context g_netvsc_drv;
@ -536,7 +540,7 @@ static int netvsc_drv_init(int (*drv_init)(struct hv_driver *drv))
vmbus_get_interface(&net_drv_obj->Base.VmbusChannelInterface);
net_drv_obj->RingBufferSize = netvsc_ringbuffer_size;
net_drv_obj->RingBufferSize = ring_size * PAGE_SIZE;
net_drv_obj->OnReceiveCallback = netvsc_recv_callback;
net_drv_obj->OnLinkStatusChanged = netvsc_linkstatus_callback;
@ -582,7 +586,6 @@ static void __exit netvsc_exit(void)
MODULE_LICENSE("GPL");
MODULE_VERSION(HV_DRV_VERSION);
MODULE_DESCRIPTION("Microsoft Hyper-V network driver");
module_param(netvsc_ringbuffer_size, int, S_IRUGO);
module_init(netvsc_init);
module_exit(netvsc_exit);