e3fe0bb65b
The OSD layer was a wrapper around native interfaces adding little value and was infact buggy - refer to the osd_wait.patch for details. This patch gets rid of the OSD abstraction. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Hank Janssen <hjanssen@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
103 lines
3.2 KiB
C
103 lines
3.2 KiB
C
/*
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*
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* Copyright (c) 2009, Microsoft Corporation.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc., 59 Temple
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* Place - Suite 330, Boston, MA 02111-1307 USA.
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*
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* Authors:
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* Haiyang Zhang <haiyangz@microsoft.com>
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* Hank Janssen <hjanssen@microsoft.com>
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*
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*/
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#include <linux/kernel.h>
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#include <linux/mm.h>
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#include "hv_api.h"
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#include "storvsc.c"
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static const char *g_blk_driver_name = "blkvsc";
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/* {32412632-86cb-44a2-9b5c-50d1417354f5} */
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static const struct hv_guid g_blk_device_type = {
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.data = {
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0x32, 0x26, 0x41, 0x32, 0xcb, 0x86, 0xa2, 0x44,
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0x9b, 0x5c, 0x50, 0xd1, 0x41, 0x73, 0x54, 0xf5
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}
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};
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static int blk_vsc_on_device_add(struct hv_device *device, void *additional_info)
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{
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struct storvsc_device_info *device_info;
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int ret = 0;
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device_info = (struct storvsc_device_info *)additional_info;
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ret = stor_vsc_on_device_add(device, additional_info);
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if (ret != 0)
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return ret;
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/*
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* We need to use the device instance guid to set the path and target
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* id. For IDE devices, the device instance id is formatted as
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* <bus id> * - <device id> - 8899 - 000000000000.
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*/
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device_info->path_id = device->dev_instance.data[3] << 24 |
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device->dev_instance.data[2] << 16 |
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device->dev_instance.data[1] << 8 |
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device->dev_instance.data[0];
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device_info->target_id = device->dev_instance.data[5] << 8 |
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device->dev_instance.data[4];
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return ret;
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}
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int blk_vsc_initialize(struct hv_driver *driver)
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{
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struct storvsc_driver_object *stor_driver;
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int ret = 0;
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stor_driver = (struct storvsc_driver_object *)driver;
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/* Make sure we are at least 2 pages since 1 page is used for control */
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/* ASSERT(stor_driver->RingBufferSize >= (PAGE_SIZE << 1)); */
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driver->name = g_blk_driver_name;
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memcpy(&driver->dev_type, &g_blk_device_type, sizeof(struct hv_guid));
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stor_driver->request_ext_size = sizeof(struct storvsc_request_extension);
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/*
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* Divide the ring buffer data size (which is 1 page less than the ring
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* buffer size since that page is reserved for the ring buffer indices)
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* by the max request size (which is
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* vmbus_channel_packet_multipage_buffer + struct vstor_packet + u64)
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*/
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stor_driver->max_outstanding_req_per_channel =
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((stor_driver->ring_buffer_size - PAGE_SIZE) /
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ALIGN(MAX_MULTIPAGE_BUFFER_PACKET +
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sizeof(struct vstor_packet) + sizeof(u64),
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sizeof(u64)));
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DPRINT_INFO(BLKVSC, "max io outstd %u",
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stor_driver->max_outstanding_req_per_channel);
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/* Setup the dispatch table */
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stor_driver->base.dev_add = blk_vsc_on_device_add;
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stor_driver->base.dev_rm = stor_vsc_on_device_remove;
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stor_driver->base.cleanup = stor_vsc_on_cleanup;
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stor_driver->on_io_request = stor_vsc_on_io_request;
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return ret;
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}
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