Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 1 | /* |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 2 | * Copyright (c) 2009, Microsoft Corporation. |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify it |
| 5 | * under the terms and conditions of the GNU General Public License, |
| 6 | * version 2, as published by the Free Software Foundation. |
| 7 | * |
| 8 | * This program is distributed in the hope it will be useful, but WITHOUT |
| 9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| 11 | * more details. |
| 12 | * |
| 13 | * You should have received a copy of the GNU General Public License along with |
| 14 | * this program; if not, write to the Free Software Foundation, Inc., 59 Temple |
| 15 | * Place - Suite 330, Boston, MA 02111-1307 USA. |
| 16 | * |
| 17 | * Authors: |
Haiyang Zhang | d0e94d1 | 2009-11-23 17:00:22 +0000 | [diff] [blame] | 18 | * Haiyang Zhang <haiyangz@microsoft.com> |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 19 | * Hank Janssen <hjanssen@microsoft.com> |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 20 | */ |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 21 | #include <linux/init.h> |
| 22 | #include <linux/module.h> |
| 23 | #include <linux/device.h> |
| 24 | #include <linux/blkdev.h> |
| 25 | #include <linux/major.h> |
| 26 | #include <linux/delay.h> |
| 27 | #include <linux/hdreg.h> |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 28 | #include <scsi/scsi.h> |
| 29 | #include <scsi/scsi_cmnd.h> |
| 30 | #include <scsi/scsi_eh.h> |
| 31 | #include <scsi/scsi_dbg.h> |
Greg Kroah-Hartman | 4983b39 | 2009-08-19 16:14:47 -0700 | [diff] [blame] | 32 | #include "osd.h" |
Greg Kroah-Hartman | 645954c | 2009-08-28 16:22:59 -0700 | [diff] [blame] | 33 | #include "logging.h" |
Greg Kroah-Hartman | 870cde8 | 2009-08-19 16:21:28 -0700 | [diff] [blame] | 34 | #include "vmbus.h" |
Greg Kroah-Hartman | 731a788 | 2009-08-28 16:23:49 -0700 | [diff] [blame] | 35 | #include "StorVscApi.h" |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 36 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 37 | |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 38 | #define BLKVSC_MINORS 64 |
| 39 | |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 40 | enum blkvsc_device_type { |
| 41 | UNKNOWN_DEV_TYPE, |
| 42 | HARDDISK_TYPE, |
| 43 | DVD_TYPE, |
| 44 | }; |
| 45 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 46 | /* |
| 47 | * This request ties the struct request and struct |
Nicolas Palix | 0b3f683 | 2009-07-29 14:10:19 +0200 | [diff] [blame] | 48 | * blkvsc_request/hv_storvsc_request together A struct request may be |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 49 | * represented by 1 or more struct blkvsc_request |
| 50 | */ |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 51 | struct blkvsc_request_group { |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 52 | int outstanding; |
| 53 | int status; |
| 54 | struct list_head blkvsc_req_list; /* list of blkvsc_requests */ |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 55 | }; |
| 56 | |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 57 | struct blkvsc_request { |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 58 | /* blkvsc_request_group.blkvsc_req_list */ |
| 59 | struct list_head req_entry; |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 60 | |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 61 | /* block_device_context.pending_list */ |
| 62 | struct list_head pend_entry; |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 63 | |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 64 | /* This may be null if we generate a request internally */ |
| 65 | struct request *req; |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 66 | |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 67 | struct block_device_context *dev; |
| 68 | |
| 69 | /* The group this request is part of. Maybe null */ |
| 70 | struct blkvsc_request_group *group; |
| 71 | |
| 72 | wait_queue_head_t wevent; |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 73 | int cond; |
| 74 | |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 75 | int write; |
| 76 | sector_t sector_start; |
| 77 | unsigned long sector_count; |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 78 | |
| 79 | unsigned char sense_buffer[SCSI_SENSE_BUFFERSIZE]; |
| 80 | unsigned char cmd_len; |
| 81 | unsigned char cmnd[MAX_COMMAND_SIZE]; |
| 82 | |
Nicolas Palix | 0b3f683 | 2009-07-29 14:10:19 +0200 | [diff] [blame] | 83 | struct hv_storvsc_request request; |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 84 | /* |
| 85 | * !!!DO NOT ADD ANYTHING BELOW HERE!!! Otherwise, memory can overlap, |
| 86 | * because - The extension buffer falls right here and is pointed to by |
| 87 | * request.Extension; |
| 88 | * Which sounds like a horrible idea, who designed this? |
| 89 | */ |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 90 | }; |
| 91 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 92 | /* Per device structure */ |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 93 | struct block_device_context { |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 94 | /* point back to our device context */ |
| 95 | struct device_context *device_ctx; |
| 96 | struct kmem_cache *request_pool; |
| 97 | spinlock_t lock; |
| 98 | struct gendisk *gd; |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 99 | enum blkvsc_device_type device_type; |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 100 | struct list_head pending_list; |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 101 | |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 102 | unsigned char device_id[64]; |
| 103 | unsigned int device_id_len; |
| 104 | int num_outstanding_reqs; |
| 105 | int shutting_down; |
| 106 | int media_not_present; |
| 107 | unsigned int sector_size; |
| 108 | sector_t capacity; |
| 109 | unsigned int port; |
| 110 | unsigned char path; |
| 111 | unsigned char target; |
| 112 | int users; |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 113 | }; |
| 114 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 115 | /* Per driver */ |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 116 | struct blkvsc_driver_context { |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 117 | /* !! These must be the first 2 fields !! */ |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 118 | /* FIXME this is a bug! */ |
| 119 | struct driver_context drv_ctx; |
Greg Kroah-Hartman | 9f0c7d2 | 2009-08-28 16:20:07 -0700 | [diff] [blame] | 120 | struct storvsc_driver_object drv_obj; |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 121 | }; |
| 122 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 123 | /* Static decl */ |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 124 | static int blkvsc_probe(struct device *dev); |
| 125 | static int blkvsc_remove(struct device *device); |
| 126 | static void blkvsc_shutdown(struct device *device); |
| 127 | |
Bill Pemberton | 39635f7 | 2009-07-27 16:47:27 -0400 | [diff] [blame] | 128 | static int blkvsc_open(struct block_device *bdev, fmode_t mode); |
Bill Pemberton | 77d2d9d | 2009-07-27 16:47:28 -0400 | [diff] [blame] | 129 | static int blkvsc_release(struct gendisk *disk, fmode_t mode); |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 130 | static int blkvsc_media_changed(struct gendisk *gd); |
| 131 | static int blkvsc_revalidate_disk(struct gendisk *gd); |
| 132 | static int blkvsc_getgeo(struct block_device *bd, struct hd_geometry *hg); |
Bill Pemberton | dfe8b2d | 2009-07-27 16:47:29 -0400 | [diff] [blame] | 133 | static int blkvsc_ioctl(struct block_device *bd, fmode_t mode, |
| 134 | unsigned cmd, unsigned long argument); |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 135 | static void blkvsc_request(struct request_queue *queue); |
Nicolas Palix | 0b3f683 | 2009-07-29 14:10:19 +0200 | [diff] [blame] | 136 | static void blkvsc_request_completion(struct hv_storvsc_request *request); |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 137 | static int blkvsc_do_request(struct block_device_context *blkdev, |
| 138 | struct request *req); |
| 139 | static int blkvsc_submit_request(struct blkvsc_request *blkvsc_req, |
| 140 | void (*request_completion)(struct hv_storvsc_request *)); |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 141 | static void blkvsc_init_rw(struct blkvsc_request *blkvsc_req); |
Nicolas Palix | 0b3f683 | 2009-07-29 14:10:19 +0200 | [diff] [blame] | 142 | static void blkvsc_cmd_completion(struct hv_storvsc_request *request); |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 143 | static int blkvsc_do_inquiry(struct block_device_context *blkdev); |
| 144 | static int blkvsc_do_read_capacity(struct block_device_context *blkdev); |
| 145 | static int blkvsc_do_read_capacity16(struct block_device_context *blkdev); |
| 146 | static int blkvsc_do_flush(struct block_device_context *blkdev); |
| 147 | static int blkvsc_cancel_pending_reqs(struct block_device_context *blkdev); |
| 148 | static int blkvsc_do_pending_reqs(struct block_device_context *blkdev); |
| 149 | |
| 150 | |
| 151 | static int blkvsc_ringbuffer_size = BLKVSC_RING_BUFFER_SIZE; |
| 152 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 153 | /* The one and only one */ |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 154 | static struct blkvsc_driver_context g_blkvsc_drv; |
| 155 | |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 156 | static struct block_device_operations block_ops = { |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 157 | .owner = THIS_MODULE, |
| 158 | .open = blkvsc_open, |
| 159 | .release = blkvsc_release, |
| 160 | .media_changed = blkvsc_media_changed, |
| 161 | .revalidate_disk = blkvsc_revalidate_disk, |
| 162 | .getgeo = blkvsc_getgeo, |
| 163 | .ioctl = blkvsc_ioctl, |
| 164 | }; |
| 165 | |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 166 | /** |
| 167 | * blkvsc_drv_init - BlkVsc driver initialization. |
| 168 | */ |
Greg Kroah-Hartman | 21707be | 2009-09-02 11:53:59 -0700 | [diff] [blame] | 169 | static int blkvsc_drv_init(int (*drv_init)(struct hv_driver *drv)) |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 170 | { |
Greg Kroah-Hartman | 9f0c7d2 | 2009-08-28 16:20:07 -0700 | [diff] [blame] | 171 | struct storvsc_driver_object *storvsc_drv_obj = &g_blkvsc_drv.drv_obj; |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 172 | struct driver_context *drv_ctx = &g_blkvsc_drv.drv_ctx; |
| 173 | int ret; |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 174 | |
| 175 | DPRINT_ENTER(BLKVSC_DRV); |
| 176 | |
| 177 | vmbus_get_interface(&storvsc_drv_obj->Base.VmbusChannelInterface); |
| 178 | |
| 179 | storvsc_drv_obj->RingBufferSize = blkvsc_ringbuffer_size; |
| 180 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 181 | /* Callback to client driver to complete the initialization */ |
Greg Kroah-Hartman | 21707be | 2009-09-02 11:53:59 -0700 | [diff] [blame] | 182 | drv_init(&storvsc_drv_obj->Base); |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 183 | |
| 184 | drv_ctx->driver.name = storvsc_drv_obj->Base.name; |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 185 | memcpy(&drv_ctx->class_id, &storvsc_drv_obj->Base.deviceType, |
| 186 | sizeof(struct hv_guid)); |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 187 | |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 188 | drv_ctx->probe = blkvsc_probe; |
| 189 | drv_ctx->remove = blkvsc_remove; |
| 190 | drv_ctx->shutdown = blkvsc_shutdown; |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 191 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 192 | /* The driver belongs to vmbus */ |
Bill Pemberton | 5d48a1c | 2009-07-27 16:47:36 -0400 | [diff] [blame] | 193 | ret = vmbus_child_driver_register(drv_ctx); |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 194 | |
| 195 | DPRINT_EXIT(BLKVSC_DRV); |
| 196 | |
| 197 | return ret; |
| 198 | } |
| 199 | |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 200 | static int blkvsc_drv_exit_cb(struct device *dev, void *data) |
| 201 | { |
| 202 | struct device **curr = (struct device **)data; |
| 203 | *curr = dev; |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 204 | return 1; /* stop iterating */ |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 205 | } |
| 206 | |
Greg Kroah-Hartman | bd1de70 | 2009-07-29 09:04:51 -0700 | [diff] [blame] | 207 | static void blkvsc_drv_exit(void) |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 208 | { |
Greg Kroah-Hartman | 9f0c7d2 | 2009-08-28 16:20:07 -0700 | [diff] [blame] | 209 | struct storvsc_driver_object *storvsc_drv_obj = &g_blkvsc_drv.drv_obj; |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 210 | struct driver_context *drv_ctx = &g_blkvsc_drv.drv_ctx; |
| 211 | struct device *current_dev; |
Bill Pemberton | 2295ba2 | 2009-07-28 13:46:22 -0400 | [diff] [blame] | 212 | int ret; |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 213 | |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 214 | DPRINT_ENTER(BLKVSC_DRV); |
| 215 | |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 216 | while (1) { |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 217 | current_dev = NULL; |
| 218 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 219 | /* Get the device */ |
Bill Pemberton | 2295ba2 | 2009-07-28 13:46:22 -0400 | [diff] [blame] | 220 | ret = driver_for_each_device(&drv_ctx->driver, NULL, |
| 221 | (void *) ¤t_dev, |
| 222 | blkvsc_drv_exit_cb); |
| 223 | |
| 224 | if (ret) |
| 225 | DPRINT_WARN(BLKVSC_DRV, |
| 226 | "driver_for_each_device returned %d", ret); |
| 227 | |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 228 | |
| 229 | if (current_dev == NULL) |
| 230 | break; |
| 231 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 232 | /* Initiate removal from the top-down */ |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 233 | device_unregister(current_dev); |
| 234 | } |
| 235 | |
| 236 | if (storvsc_drv_obj->Base.OnCleanup) |
| 237 | storvsc_drv_obj->Base.OnCleanup(&storvsc_drv_obj->Base); |
| 238 | |
| 239 | vmbus_child_driver_unregister(drv_ctx); |
| 240 | |
| 241 | DPRINT_EXIT(BLKVSC_DRV); |
| 242 | |
| 243 | return; |
| 244 | } |
| 245 | |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 246 | /** |
| 247 | * blkvsc_probe - Add a new device for this driver |
| 248 | */ |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 249 | static int blkvsc_probe(struct device *device) |
| 250 | { |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 251 | struct driver_context *driver_ctx = |
| 252 | driver_to_driver_context(device->driver); |
| 253 | struct blkvsc_driver_context *blkvsc_drv_ctx = |
| 254 | (struct blkvsc_driver_context *)driver_ctx; |
| 255 | struct storvsc_driver_object *storvsc_drv_obj = |
| 256 | &blkvsc_drv_ctx->drv_obj; |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 257 | struct device_context *device_ctx = device_to_device_context(device); |
Nicolas Palix | 3d3b551 | 2009-07-28 17:32:53 +0200 | [diff] [blame] | 258 | struct hv_device *device_obj = &device_ctx->device_obj; |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 259 | |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 260 | struct block_device_context *blkdev = NULL; |
Greg Kroah-Hartman | 9f0c7d2 | 2009-08-28 16:20:07 -0700 | [diff] [blame] | 261 | struct storvsc_device_info device_info; |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 262 | int major = 0; |
| 263 | int devnum = 0; |
| 264 | int ret = 0; |
| 265 | static int ide0_registered; |
| 266 | static int ide1_registered; |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 267 | |
| 268 | DPRINT_ENTER(BLKVSC_DRV); |
| 269 | |
| 270 | DPRINT_DBG(BLKVSC_DRV, "blkvsc_probe - enter"); |
| 271 | |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 272 | if (!storvsc_drv_obj->Base.OnDeviceAdd) { |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 273 | DPRINT_ERR(BLKVSC_DRV, "OnDeviceAdd() not set"); |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 274 | ret = -1; |
| 275 | goto Cleanup; |
| 276 | } |
| 277 | |
| 278 | blkdev = kzalloc(sizeof(struct block_device_context), GFP_KERNEL); |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 279 | if (!blkdev) { |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 280 | ret = -ENOMEM; |
| 281 | goto Cleanup; |
| 282 | } |
| 283 | |
| 284 | INIT_LIST_HEAD(&blkdev->pending_list); |
| 285 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 286 | /* Initialize what we can here */ |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 287 | spin_lock_init(&blkdev->lock); |
| 288 | |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 289 | ASSERT(sizeof(struct blkvsc_request_group) <= |
| 290 | sizeof(struct blkvsc_request)); |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 291 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 292 | blkdev->request_pool = kmem_cache_create(dev_name(&device_ctx->device), |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 293 | sizeof(struct blkvsc_request) + |
| 294 | storvsc_drv_obj->RequestExtSize, 0, |
| 295 | SLAB_HWCACHE_ALIGN, NULL); |
| 296 | if (!blkdev->request_pool) { |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 297 | ret = -ENOMEM; |
| 298 | goto Cleanup; |
| 299 | } |
| 300 | |
| 301 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 302 | /* Call to the vsc driver to add the device */ |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 303 | ret = storvsc_drv_obj->Base.OnDeviceAdd(device_obj, &device_info); |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 304 | if (ret != 0) { |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 305 | DPRINT_ERR(BLKVSC_DRV, "unable to add blkvsc device"); |
| 306 | goto Cleanup; |
| 307 | } |
| 308 | |
| 309 | blkdev->device_ctx = device_ctx; |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 310 | /* this identified the device 0 or 1 */ |
| 311 | blkdev->target = device_info.TargetId; |
| 312 | /* this identified the ide ctrl 0 or 1 */ |
| 313 | blkdev->path = device_info.PathId; |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 314 | |
Greg Kroah-Hartman | b57a68d | 2009-07-24 11:00:10 -0700 | [diff] [blame] | 315 | dev_set_drvdata(device, blkdev); |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 316 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 317 | /* Calculate the major and device num */ |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 318 | if (blkdev->path == 0) { |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 319 | major = IDE0_MAJOR; |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 320 | devnum = blkdev->path + blkdev->target; /* 0 or 1 */ |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 321 | |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 322 | if (!ide0_registered) { |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 323 | ret = register_blkdev(major, "ide"); |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 324 | if (ret != 0) { |
| 325 | DPRINT_ERR(BLKVSC_DRV, |
| 326 | "register_blkdev() failed! ret %d", |
| 327 | ret); |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 328 | goto Remove; |
| 329 | } |
| 330 | |
| 331 | ide0_registered = 1; |
| 332 | } |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 333 | } else if (blkdev->path == 1) { |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 334 | major = IDE1_MAJOR; |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 335 | devnum = blkdev->path + blkdev->target + 1; /* 2 or 3 */ |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 336 | |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 337 | if (!ide1_registered) { |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 338 | ret = register_blkdev(major, "ide"); |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 339 | if (ret != 0) { |
| 340 | DPRINT_ERR(BLKVSC_DRV, |
| 341 | "register_blkdev() failed! ret %d", |
| 342 | ret); |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 343 | goto Remove; |
| 344 | } |
| 345 | |
| 346 | ide1_registered = 1; |
| 347 | } |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 348 | } else { |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 349 | DPRINT_ERR(BLKVSC_DRV, "invalid pathid"); |
| 350 | ret = -1; |
| 351 | goto Cleanup; |
| 352 | } |
| 353 | |
| 354 | DPRINT_INFO(BLKVSC_DRV, "blkvsc registered for major %d!!", major); |
| 355 | |
| 356 | blkdev->gd = alloc_disk(BLKVSC_MINORS); |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 357 | if (!blkdev->gd) { |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 358 | DPRINT_ERR(BLKVSC_DRV, "register_blkdev() failed! ret %d", ret); |
| 359 | ret = -1; |
| 360 | goto Cleanup; |
| 361 | } |
| 362 | |
| 363 | blkdev->gd->queue = blk_init_queue(blkvsc_request, &blkdev->lock); |
| 364 | |
| 365 | blk_queue_max_segment_size(blkdev->gd->queue, PAGE_SIZE); |
Martin K. Petersen | 8a78362 | 2010-02-26 00:20:39 -0500 | [diff] [blame^] | 366 | blk_queue_max_segments(blkdev->gd->queue, MAX_MULTIPAGE_BUFFER_COUNT); |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 367 | blk_queue_segment_boundary(blkdev->gd->queue, PAGE_SIZE-1); |
| 368 | blk_queue_bounce_limit(blkdev->gd->queue, BLK_BOUNCE_ANY); |
| 369 | blk_queue_dma_alignment(blkdev->gd->queue, 511); |
| 370 | |
| 371 | blkdev->gd->major = major; |
| 372 | if (devnum == 1 || devnum == 3) |
| 373 | blkdev->gd->first_minor = BLKVSC_MINORS; |
| 374 | else |
| 375 | blkdev->gd->first_minor = 0; |
| 376 | blkdev->gd->fops = &block_ops; |
| 377 | blkdev->gd->private_data = blkdev; |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 378 | sprintf(blkdev->gd->disk_name, "hd%c", 'a' + devnum); |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 379 | |
| 380 | blkvsc_do_inquiry(blkdev); |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 381 | if (blkdev->device_type == DVD_TYPE) { |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 382 | set_disk_ro(blkdev->gd, 1); |
| 383 | blkdev->gd->flags |= GENHD_FL_REMOVABLE; |
| 384 | blkvsc_do_read_capacity(blkdev); |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 385 | } else { |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 386 | blkvsc_do_read_capacity16(blkdev); |
| 387 | } |
| 388 | |
| 389 | set_capacity(blkdev->gd, blkdev->capacity * (blkdev->sector_size/512)); |
Greg Kroah-Hartman | 0fce4c2 | 2009-07-14 10:24:38 -0700 | [diff] [blame] | 390 | blk_queue_logical_block_size(blkdev->gd->queue, blkdev->sector_size); |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 391 | /* go! */ |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 392 | add_disk(blkdev->gd); |
| 393 | |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 394 | DPRINT_INFO(BLKVSC_DRV, "%s added!! capacity %lu sector_size %d", |
| 395 | blkdev->gd->disk_name, (unsigned long)blkdev->capacity, |
| 396 | blkdev->sector_size); |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 397 | |
| 398 | return ret; |
| 399 | |
| 400 | Remove: |
| 401 | storvsc_drv_obj->Base.OnDeviceRemove(device_obj); |
| 402 | |
| 403 | Cleanup: |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 404 | if (blkdev) { |
| 405 | if (blkdev->request_pool) { |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 406 | kmem_cache_destroy(blkdev->request_pool); |
| 407 | blkdev->request_pool = NULL; |
| 408 | } |
| 409 | kfree(blkdev); |
| 410 | blkdev = NULL; |
| 411 | } |
| 412 | |
| 413 | DPRINT_EXIT(BLKVSC_DRV); |
| 414 | |
| 415 | return ret; |
| 416 | } |
| 417 | |
| 418 | static void blkvsc_shutdown(struct device *device) |
| 419 | { |
Greg Kroah-Hartman | b57a68d | 2009-07-24 11:00:10 -0700 | [diff] [blame] | 420 | struct block_device_context *blkdev = dev_get_drvdata(device); |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 421 | unsigned long flags; |
| 422 | |
| 423 | if (!blkdev) |
| 424 | return; |
| 425 | |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 426 | DPRINT_DBG(BLKVSC_DRV, "blkvsc_shutdown - users %d disk %s\n", |
| 427 | blkdev->users, blkdev->gd->disk_name); |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 428 | |
| 429 | spin_lock_irqsave(&blkdev->lock, flags); |
| 430 | |
| 431 | blkdev->shutting_down = 1; |
| 432 | |
| 433 | blk_stop_queue(blkdev->gd->queue); |
| 434 | |
| 435 | spin_unlock_irqrestore(&blkdev->lock, flags); |
| 436 | |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 437 | while (blkdev->num_outstanding_reqs) { |
| 438 | DPRINT_INFO(STORVSC, "waiting for %d requests to complete...", |
| 439 | blkdev->num_outstanding_reqs); |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 440 | udelay(100); |
| 441 | } |
| 442 | |
| 443 | blkvsc_do_flush(blkdev); |
| 444 | |
| 445 | spin_lock_irqsave(&blkdev->lock, flags); |
| 446 | |
| 447 | blkvsc_cancel_pending_reqs(blkdev); |
| 448 | |
| 449 | spin_unlock_irqrestore(&blkdev->lock, flags); |
| 450 | } |
| 451 | |
| 452 | static int blkvsc_do_flush(struct block_device_context *blkdev) |
| 453 | { |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 454 | struct blkvsc_request *blkvsc_req; |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 455 | |
| 456 | DPRINT_DBG(BLKVSC_DRV, "blkvsc_do_flush()\n"); |
| 457 | |
| 458 | if (blkdev->device_type != HARDDISK_TYPE) |
| 459 | return 0; |
| 460 | |
| 461 | blkvsc_req = kmem_cache_alloc(blkdev->request_pool, GFP_KERNEL); |
| 462 | if (!blkvsc_req) |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 463 | return -ENOMEM; |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 464 | |
| 465 | memset(blkvsc_req, 0, sizeof(struct blkvsc_request)); |
| 466 | init_waitqueue_head(&blkvsc_req->wevent); |
| 467 | blkvsc_req->dev = blkdev; |
| 468 | blkvsc_req->req = NULL; |
| 469 | blkvsc_req->write = 0; |
| 470 | |
| 471 | blkvsc_req->request.DataBuffer.PfnArray[0] = 0; |
| 472 | blkvsc_req->request.DataBuffer.Offset = 0; |
| 473 | blkvsc_req->request.DataBuffer.Length = 0; |
| 474 | |
| 475 | blkvsc_req->cmnd[0] = SYNCHRONIZE_CACHE; |
| 476 | blkvsc_req->cmd_len = 10; |
| 477 | |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 478 | /* |
| 479 | * Set this here since the completion routine may be invoked and |
| 480 | * completed before we return |
| 481 | */ |
| 482 | blkvsc_req->cond = 0; |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 483 | blkvsc_submit_request(blkvsc_req, blkvsc_cmd_completion); |
| 484 | |
| 485 | wait_event_interruptible(blkvsc_req->wevent, blkvsc_req->cond); |
| 486 | |
| 487 | kmem_cache_free(blkvsc_req->dev->request_pool, blkvsc_req); |
| 488 | |
| 489 | return 0; |
| 490 | } |
| 491 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 492 | /* Do a scsi INQUIRY cmd here to get the device type (ie disk or dvd) */ |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 493 | static int blkvsc_do_inquiry(struct block_device_context *blkdev) |
| 494 | { |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 495 | struct blkvsc_request *blkvsc_req; |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 496 | struct page *page_buf; |
| 497 | unsigned char *buf; |
| 498 | unsigned char device_type; |
| 499 | |
| 500 | DPRINT_DBG(BLKVSC_DRV, "blkvsc_do_inquiry()\n"); |
| 501 | |
| 502 | blkvsc_req = kmem_cache_alloc(blkdev->request_pool, GFP_KERNEL); |
| 503 | if (!blkvsc_req) |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 504 | return -ENOMEM; |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 505 | |
| 506 | memset(blkvsc_req, 0, sizeof(struct blkvsc_request)); |
| 507 | page_buf = alloc_page(GFP_KERNEL); |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 508 | if (!page_buf) { |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 509 | kmem_cache_free(blkvsc_req->dev->request_pool, blkvsc_req); |
| 510 | return -ENOMEM; |
| 511 | } |
| 512 | |
| 513 | init_waitqueue_head(&blkvsc_req->wevent); |
| 514 | blkvsc_req->dev = blkdev; |
| 515 | blkvsc_req->req = NULL; |
| 516 | blkvsc_req->write = 0; |
| 517 | |
| 518 | blkvsc_req->request.DataBuffer.PfnArray[0] = page_to_pfn(page_buf); |
| 519 | blkvsc_req->request.DataBuffer.Offset = 0; |
| 520 | blkvsc_req->request.DataBuffer.Length = 64; |
| 521 | |
| 522 | blkvsc_req->cmnd[0] = INQUIRY; |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 523 | blkvsc_req->cmnd[1] = 0x1; /* Get product data */ |
| 524 | blkvsc_req->cmnd[2] = 0x83; /* mode page 83 */ |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 525 | blkvsc_req->cmnd[4] = 64; |
| 526 | blkvsc_req->cmd_len = 6; |
| 527 | |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 528 | /* |
| 529 | * Set this here since the completion routine may be invoked and |
| 530 | * completed before we return |
| 531 | */ |
| 532 | blkvsc_req->cond = 0; |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 533 | |
| 534 | blkvsc_submit_request(blkvsc_req, blkvsc_cmd_completion); |
| 535 | |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 536 | DPRINT_DBG(BLKVSC_DRV, "waiting %p to complete - cond %d\n", |
| 537 | blkvsc_req, blkvsc_req->cond); |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 538 | |
| 539 | wait_event_interruptible(blkvsc_req->wevent, blkvsc_req->cond); |
| 540 | |
| 541 | buf = kmap(page_buf); |
| 542 | |
Greg Kroah-Hartman | 04f50c4 | 2009-07-16 12:35:37 -0700 | [diff] [blame] | 543 | /* print_hex_dump_bytes("", DUMP_PREFIX_NONE, buf, 64); */ |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 544 | /* be to le */ |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 545 | device_type = buf[0] & 0x1F; |
| 546 | |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 547 | if (device_type == 0x0) { |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 548 | blkdev->device_type = HARDDISK_TYPE; |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 549 | } else if (device_type == 0x5) { |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 550 | blkdev->device_type = DVD_TYPE; |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 551 | } else { |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 552 | /* TODO: this is currently unsupported device type */ |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 553 | blkdev->device_type = UNKNOWN_DEV_TYPE; |
| 554 | } |
| 555 | |
| 556 | DPRINT_DBG(BLKVSC_DRV, "device type %d \n", device_type); |
| 557 | |
| 558 | blkdev->device_id_len = buf[7]; |
| 559 | if (blkdev->device_id_len > 64) |
| 560 | blkdev->device_id_len = 64; |
| 561 | |
| 562 | memcpy(blkdev->device_id, &buf[8], blkdev->device_id_len); |
Greg Kroah-Hartman | 04f50c4 | 2009-07-16 12:35:37 -0700 | [diff] [blame] | 563 | /* printk_hex_dump_bytes("", DUMP_PREFIX_NONE, blkdev->device_id, |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 564 | * blkdev->device_id_len); */ |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 565 | |
| 566 | kunmap(page_buf); |
| 567 | |
| 568 | __free_page(page_buf); |
| 569 | |
| 570 | kmem_cache_free(blkvsc_req->dev->request_pool, blkvsc_req); |
| 571 | |
| 572 | return 0; |
| 573 | } |
| 574 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 575 | /* Do a scsi READ_CAPACITY cmd here to get the size of the disk */ |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 576 | static int blkvsc_do_read_capacity(struct block_device_context *blkdev) |
| 577 | { |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 578 | struct blkvsc_request *blkvsc_req; |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 579 | struct page *page_buf; |
| 580 | unsigned char *buf; |
| 581 | struct scsi_sense_hdr sense_hdr; |
| 582 | |
| 583 | DPRINT_DBG(BLKVSC_DRV, "blkvsc_do_read_capacity()\n"); |
| 584 | |
| 585 | blkdev->sector_size = 0; |
| 586 | blkdev->capacity = 0; |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 587 | blkdev->media_not_present = 0; /* assume a disk is present */ |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 588 | |
| 589 | blkvsc_req = kmem_cache_alloc(blkdev->request_pool, GFP_KERNEL); |
| 590 | if (!blkvsc_req) |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 591 | return -ENOMEM; |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 592 | |
| 593 | memset(blkvsc_req, 0, sizeof(struct blkvsc_request)); |
| 594 | page_buf = alloc_page(GFP_KERNEL); |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 595 | if (!page_buf) { |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 596 | kmem_cache_free(blkvsc_req->dev->request_pool, blkvsc_req); |
| 597 | return -ENOMEM; |
| 598 | } |
| 599 | |
| 600 | init_waitqueue_head(&blkvsc_req->wevent); |
| 601 | blkvsc_req->dev = blkdev; |
| 602 | blkvsc_req->req = NULL; |
| 603 | blkvsc_req->write = 0; |
| 604 | |
| 605 | blkvsc_req->request.DataBuffer.PfnArray[0] = page_to_pfn(page_buf); |
| 606 | blkvsc_req->request.DataBuffer.Offset = 0; |
| 607 | blkvsc_req->request.DataBuffer.Length = 8; |
| 608 | |
| 609 | blkvsc_req->cmnd[0] = READ_CAPACITY; |
| 610 | blkvsc_req->cmd_len = 16; |
| 611 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 612 | /* |
| 613 | * Set this here since the completion routine may be invoked |
| 614 | * and completed before we return |
| 615 | */ |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 616 | blkvsc_req->cond = 0; |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 617 | |
| 618 | blkvsc_submit_request(blkvsc_req, blkvsc_cmd_completion); |
| 619 | |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 620 | DPRINT_DBG(BLKVSC_DRV, "waiting %p to complete - cond %d\n", |
| 621 | blkvsc_req, blkvsc_req->cond); |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 622 | |
| 623 | wait_event_interruptible(blkvsc_req->wevent, blkvsc_req->cond); |
| 624 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 625 | /* check error */ |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 626 | if (blkvsc_req->request.Status) { |
| 627 | scsi_normalize_sense(blkvsc_req->sense_buffer, |
| 628 | SCSI_SENSE_BUFFERSIZE, &sense_hdr); |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 629 | |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 630 | if (sense_hdr.asc == 0x3A) { |
| 631 | /* Medium not present */ |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 632 | blkdev->media_not_present = 1; |
| 633 | } |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 634 | return 0; |
| 635 | } |
| 636 | buf = kmap(page_buf); |
| 637 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 638 | /* be to le */ |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 639 | blkdev->capacity = ((buf[0] << 24) | (buf[1] << 16) | |
| 640 | (buf[2] << 8) | buf[3]) + 1; |
| 641 | blkdev->sector_size = (buf[4] << 24) | (buf[5] << 16) | |
| 642 | (buf[6] << 8) | buf[7]; |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 643 | |
| 644 | kunmap(page_buf); |
| 645 | |
| 646 | __free_page(page_buf); |
| 647 | |
| 648 | kmem_cache_free(blkvsc_req->dev->request_pool, blkvsc_req); |
| 649 | |
| 650 | return 0; |
| 651 | } |
| 652 | |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 653 | static int blkvsc_do_read_capacity16(struct block_device_context *blkdev) |
| 654 | { |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 655 | struct blkvsc_request *blkvsc_req; |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 656 | struct page *page_buf; |
| 657 | unsigned char *buf; |
| 658 | struct scsi_sense_hdr sense_hdr; |
| 659 | |
| 660 | DPRINT_DBG(BLKVSC_DRV, "blkvsc_do_read_capacity16()\n"); |
| 661 | |
| 662 | blkdev->sector_size = 0; |
| 663 | blkdev->capacity = 0; |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 664 | blkdev->media_not_present = 0; /* assume a disk is present */ |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 665 | |
| 666 | blkvsc_req = kmem_cache_alloc(blkdev->request_pool, GFP_KERNEL); |
| 667 | if (!blkvsc_req) |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 668 | return -ENOMEM; |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 669 | |
| 670 | memset(blkvsc_req, 0, sizeof(struct blkvsc_request)); |
| 671 | page_buf = alloc_page(GFP_KERNEL); |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 672 | if (!page_buf) { |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 673 | kmem_cache_free(blkvsc_req->dev->request_pool, blkvsc_req); |
| 674 | return -ENOMEM; |
| 675 | } |
| 676 | |
| 677 | init_waitqueue_head(&blkvsc_req->wevent); |
| 678 | blkvsc_req->dev = blkdev; |
| 679 | blkvsc_req->req = NULL; |
| 680 | blkvsc_req->write = 0; |
| 681 | |
| 682 | blkvsc_req->request.DataBuffer.PfnArray[0] = page_to_pfn(page_buf); |
| 683 | blkvsc_req->request.DataBuffer.Offset = 0; |
| 684 | blkvsc_req->request.DataBuffer.Length = 12; |
| 685 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 686 | blkvsc_req->cmnd[0] = 0x9E; /* READ_CAPACITY16; */ |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 687 | blkvsc_req->cmd_len = 16; |
| 688 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 689 | /* |
| 690 | * Set this here since the completion routine may be invoked |
| 691 | * and completed before we return |
| 692 | */ |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 693 | blkvsc_req->cond = 0; |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 694 | |
| 695 | blkvsc_submit_request(blkvsc_req, blkvsc_cmd_completion); |
| 696 | |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 697 | DPRINT_DBG(BLKVSC_DRV, "waiting %p to complete - cond %d\n", |
| 698 | blkvsc_req, blkvsc_req->cond); |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 699 | |
| 700 | wait_event_interruptible(blkvsc_req->wevent, blkvsc_req->cond); |
| 701 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 702 | /* check error */ |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 703 | if (blkvsc_req->request.Status) { |
| 704 | scsi_normalize_sense(blkvsc_req->sense_buffer, |
| 705 | SCSI_SENSE_BUFFERSIZE, &sense_hdr); |
| 706 | if (sense_hdr.asc == 0x3A) { |
| 707 | /* Medium not present */ |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 708 | blkdev->media_not_present = 1; |
| 709 | } |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 710 | return 0; |
| 711 | } |
| 712 | buf = kmap(page_buf); |
| 713 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 714 | /* be to le */ |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 715 | blkdev->capacity = be64_to_cpu(*(unsigned long long *) &buf[0]) + 1; |
| 716 | blkdev->sector_size = be32_to_cpu(*(unsigned int *)&buf[8]); |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 717 | |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 718 | #if 0 |
| 719 | blkdev->capacity = ((buf[0] << 24) | (buf[1] << 16) | |
| 720 | (buf[2] << 8) | buf[3]) + 1; |
| 721 | blkdev->sector_size = (buf[4] << 24) | (buf[5] << 16) | |
| 722 | (buf[6] << 8) | buf[7]; |
| 723 | #endif |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 724 | |
| 725 | kunmap(page_buf); |
| 726 | |
| 727 | __free_page(page_buf); |
| 728 | |
| 729 | kmem_cache_free(blkvsc_req->dev->request_pool, blkvsc_req); |
| 730 | |
| 731 | return 0; |
| 732 | } |
| 733 | |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 734 | /** |
| 735 | * blkvsc_remove() - Callback when our device is removed |
| 736 | */ |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 737 | static int blkvsc_remove(struct device *device) |
| 738 | { |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 739 | struct driver_context *driver_ctx = |
| 740 | driver_to_driver_context(device->driver); |
| 741 | struct blkvsc_driver_context *blkvsc_drv_ctx = |
| 742 | (struct blkvsc_driver_context *)driver_ctx; |
| 743 | struct storvsc_driver_object *storvsc_drv_obj = |
| 744 | &blkvsc_drv_ctx->drv_obj; |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 745 | struct device_context *device_ctx = device_to_device_context(device); |
Nicolas Palix | 3d3b551 | 2009-07-28 17:32:53 +0200 | [diff] [blame] | 746 | struct hv_device *device_obj = &device_ctx->device_obj; |
Greg Kroah-Hartman | b57a68d | 2009-07-24 11:00:10 -0700 | [diff] [blame] | 747 | struct block_device_context *blkdev = dev_get_drvdata(device); |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 748 | unsigned long flags; |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 749 | int ret; |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 750 | |
| 751 | DPRINT_ENTER(BLKVSC_DRV); |
| 752 | |
| 753 | DPRINT_DBG(BLKVSC_DRV, "blkvsc_remove()\n"); |
| 754 | |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 755 | if (!storvsc_drv_obj->Base.OnDeviceRemove) { |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 756 | DPRINT_EXIT(BLKVSC_DRV); |
| 757 | return -1; |
| 758 | } |
| 759 | |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 760 | /* |
| 761 | * Call to the vsc driver to let it know that the device is being |
| 762 | * removed |
| 763 | */ |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 764 | ret = storvsc_drv_obj->Base.OnDeviceRemove(device_obj); |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 765 | if (ret != 0) { |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 766 | /* TODO: */ |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 767 | DPRINT_ERR(BLKVSC_DRV, |
| 768 | "unable to remove blkvsc device (ret %d)", ret); |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 769 | } |
| 770 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 771 | /* Get to a known state */ |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 772 | spin_lock_irqsave(&blkdev->lock, flags); |
| 773 | |
| 774 | blkdev->shutting_down = 1; |
| 775 | |
| 776 | blk_stop_queue(blkdev->gd->queue); |
| 777 | |
| 778 | spin_unlock_irqrestore(&blkdev->lock, flags); |
| 779 | |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 780 | while (blkdev->num_outstanding_reqs) { |
| 781 | DPRINT_INFO(STORVSC, "waiting for %d requests to complete...", |
| 782 | blkdev->num_outstanding_reqs); |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 783 | udelay(100); |
| 784 | } |
| 785 | |
| 786 | blkvsc_do_flush(blkdev); |
| 787 | |
| 788 | spin_lock_irqsave(&blkdev->lock, flags); |
| 789 | |
| 790 | blkvsc_cancel_pending_reqs(blkdev); |
| 791 | |
| 792 | spin_unlock_irqrestore(&blkdev->lock, flags); |
| 793 | |
| 794 | blk_cleanup_queue(blkdev->gd->queue); |
| 795 | |
| 796 | del_gendisk(blkdev->gd); |
| 797 | |
| 798 | kmem_cache_destroy(blkdev->request_pool); |
| 799 | |
| 800 | kfree(blkdev); |
| 801 | |
| 802 | DPRINT_EXIT(BLKVSC_DRV); |
| 803 | |
| 804 | return ret; |
| 805 | } |
| 806 | |
| 807 | static void blkvsc_init_rw(struct blkvsc_request *blkvsc_req) |
| 808 | { |
| 809 | ASSERT(blkvsc_req->req); |
| 810 | ASSERT(blkvsc_req->sector_count <= (MAX_MULTIPAGE_BUFFER_COUNT*8)); |
| 811 | |
| 812 | blkvsc_req->cmd_len = 16; |
| 813 | |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 814 | if (blkvsc_req->sector_start > 0xffffffff) { |
| 815 | if (rq_data_dir(blkvsc_req->req)) { |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 816 | blkvsc_req->write = 1; |
| 817 | blkvsc_req->cmnd[0] = WRITE_16; |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 818 | } else { |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 819 | blkvsc_req->write = 0; |
| 820 | blkvsc_req->cmnd[0] = READ_16; |
| 821 | } |
| 822 | |
| 823 | blkvsc_req->cmnd[1] |= blk_fua_rq(blkvsc_req->req) ? 0x8 : 0; |
| 824 | |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 825 | *(unsigned long long *)&blkvsc_req->cmnd[2] = |
| 826 | cpu_to_be64(blkvsc_req->sector_start); |
| 827 | *(unsigned int *)&blkvsc_req->cmnd[10] = |
| 828 | cpu_to_be32(blkvsc_req->sector_count); |
| 829 | } else if ((blkvsc_req->sector_count > 0xff) || |
| 830 | (blkvsc_req->sector_start > 0x1fffff)) { |
| 831 | if (rq_data_dir(blkvsc_req->req)) { |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 832 | blkvsc_req->write = 1; |
| 833 | blkvsc_req->cmnd[0] = WRITE_10; |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 834 | } else { |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 835 | blkvsc_req->write = 0; |
| 836 | blkvsc_req->cmnd[0] = READ_10; |
| 837 | } |
| 838 | |
| 839 | blkvsc_req->cmnd[1] |= blk_fua_rq(blkvsc_req->req) ? 0x8 : 0; |
| 840 | |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 841 | *(unsigned int *)&blkvsc_req->cmnd[2] = |
| 842 | cpu_to_be32(blkvsc_req->sector_start); |
| 843 | *(unsigned short *)&blkvsc_req->cmnd[7] = |
| 844 | cpu_to_be16(blkvsc_req->sector_count); |
| 845 | } else { |
| 846 | if (rq_data_dir(blkvsc_req->req)) { |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 847 | blkvsc_req->write = 1; |
| 848 | blkvsc_req->cmnd[0] = WRITE_6; |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 849 | } else { |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 850 | blkvsc_req->write = 0; |
| 851 | blkvsc_req->cmnd[0] = READ_6; |
| 852 | } |
| 853 | |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 854 | *(unsigned int *)&blkvsc_req->cmnd[1] = |
| 855 | cpu_to_be32(blkvsc_req->sector_start) >> 8; |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 856 | blkvsc_req->cmnd[1] &= 0x1f; |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 857 | blkvsc_req->cmnd[4] = (unsigned char)blkvsc_req->sector_count; |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 858 | } |
| 859 | } |
| 860 | |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 861 | static int blkvsc_submit_request(struct blkvsc_request *blkvsc_req, |
| 862 | void (*request_completion)(struct hv_storvsc_request *)) |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 863 | { |
| 864 | struct block_device_context *blkdev = blkvsc_req->dev; |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 865 | struct device_context *device_ctx = blkdev->device_ctx; |
| 866 | struct driver_context *driver_ctx = |
| 867 | driver_to_driver_context(device_ctx->device.driver); |
| 868 | struct blkvsc_driver_context *blkvsc_drv_ctx = |
| 869 | (struct blkvsc_driver_context *)driver_ctx; |
| 870 | struct storvsc_driver_object *storvsc_drv_obj = |
| 871 | &blkvsc_drv_ctx->drv_obj; |
Nicolas Palix | 0b3f683 | 2009-07-29 14:10:19 +0200 | [diff] [blame] | 872 | struct hv_storvsc_request *storvsc_req; |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 873 | int ret; |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 874 | |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 875 | DPRINT_DBG(BLKVSC_DRV, "blkvsc_submit_request() - " |
| 876 | "req %p type %s start_sector %lu count %ld offset %d " |
| 877 | "len %d\n", blkvsc_req, |
| 878 | (blkvsc_req->write) ? "WRITE" : "READ", |
| 879 | (unsigned long) blkvsc_req->sector_start, |
| 880 | blkvsc_req->sector_count, |
| 881 | blkvsc_req->request.DataBuffer.Offset, |
| 882 | blkvsc_req->request.DataBuffer.Length); |
| 883 | #if 0 |
| 884 | for (i = 0; i < (blkvsc_req->request.DataBuffer.Length >> 12); i++) { |
| 885 | DPRINT_DBG(BLKVSC_DRV, "blkvsc_submit_request() - " |
| 886 | "req %p pfn[%d] %llx\n", |
| 887 | blkvsc_req, i, |
| 888 | blkvsc_req->request.DataBuffer.PfnArray[i]); |
| 889 | } |
| 890 | #endif |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 891 | |
| 892 | storvsc_req = &blkvsc_req->request; |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 893 | storvsc_req->Extension = (void *)((unsigned long)blkvsc_req + |
| 894 | sizeof(struct blkvsc_request)); |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 895 | |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 896 | storvsc_req->Type = blkvsc_req->write ? WRITE_TYPE : READ_TYPE; |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 897 | |
| 898 | storvsc_req->OnIOCompletion = request_completion; |
| 899 | storvsc_req->Context = blkvsc_req; |
| 900 | |
| 901 | storvsc_req->Host = blkdev->port; |
| 902 | storvsc_req->Bus = blkdev->path; |
| 903 | storvsc_req->TargetId = blkdev->target; |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 904 | storvsc_req->LunId = 0; /* this is not really used at all */ |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 905 | |
| 906 | storvsc_req->CdbLen = blkvsc_req->cmd_len; |
| 907 | storvsc_req->Cdb = blkvsc_req->cmnd; |
| 908 | |
| 909 | storvsc_req->SenseBuffer = blkvsc_req->sense_buffer; |
| 910 | storvsc_req->SenseBufferSize = SCSI_SENSE_BUFFERSIZE; |
| 911 | |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 912 | ret = storvsc_drv_obj->OnIORequest(&blkdev->device_ctx->device_obj, |
| 913 | &blkvsc_req->request); |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 914 | if (ret == 0) |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 915 | blkdev->num_outstanding_reqs++; |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 916 | |
| 917 | return ret; |
| 918 | } |
| 919 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 920 | /* |
| 921 | * We break the request into 1 or more blkvsc_requests and submit |
| 922 | * them. If we cant submit them all, we put them on the |
| 923 | * pending_list. The blkvsc_request() will work on the pending_list. |
| 924 | */ |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 925 | static int blkvsc_do_request(struct block_device_context *blkdev, |
| 926 | struct request *req) |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 927 | { |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 928 | struct bio *bio = NULL; |
| 929 | struct bio_vec *bvec = NULL; |
| 930 | struct bio_vec *prev_bvec = NULL; |
| 931 | struct blkvsc_request *blkvsc_req = NULL; |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 932 | struct blkvsc_request *tmp; |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 933 | int databuf_idx = 0; |
| 934 | int seg_idx = 0; |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 935 | sector_t start_sector; |
| 936 | unsigned long num_sectors = 0; |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 937 | int ret = 0; |
| 938 | int pending = 0; |
| 939 | struct blkvsc_request_group *group = NULL; |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 940 | |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 941 | DPRINT_DBG(BLKVSC_DRV, "blkdev %p req %p sect %lu \n", blkdev, req, |
| 942 | (unsigned long)blk_rq_pos(req)); |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 943 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 944 | /* Create a group to tie req to list of blkvsc_reqs */ |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 945 | group = kmem_cache_alloc(blkdev->request_pool, GFP_ATOMIC); |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 946 | if (!group) |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 947 | return -ENOMEM; |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 948 | |
| 949 | INIT_LIST_HEAD(&group->blkvsc_req_list); |
| 950 | group->outstanding = group->status = 0; |
| 951 | |
Greg Kroah-Hartman | 0fce4c2 | 2009-07-14 10:24:38 -0700 | [diff] [blame] | 952 | start_sector = blk_rq_pos(req); |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 953 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 954 | /* foreach bio in the request */ |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 955 | if (req->bio) { |
| 956 | for (bio = req->bio; bio; bio = bio->bi_next) { |
| 957 | /* |
| 958 | * Map this bio into an existing or new storvsc request |
| 959 | */ |
| 960 | bio_for_each_segment(bvec, bio, seg_idx) { |
| 961 | DPRINT_DBG(BLKVSC_DRV, "bio_for_each_segment() " |
| 962 | "- req %p bio %p bvec %p seg_idx %d " |
| 963 | "databuf_idx %d\n", req, bio, bvec, |
| 964 | seg_idx, databuf_idx); |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 965 | |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 966 | /* Get a new storvsc request */ |
| 967 | /* 1st-time */ |
| 968 | if ((!blkvsc_req) || |
| 969 | (databuf_idx >= MAX_MULTIPAGE_BUFFER_COUNT) |
| 970 | /* hole at the begin of page */ |
| 971 | || (bvec->bv_offset != 0) || |
| 972 | /* hold at the end of page */ |
| 973 | (prev_bvec && |
| 974 | (prev_bvec->bv_len != PAGE_SIZE))) { |
| 975 | /* submit the prev one */ |
| 976 | if (blkvsc_req) { |
| 977 | blkvsc_req->sector_start = start_sector; |
| 978 | sector_div(blkvsc_req->sector_start, (blkdev->sector_size >> 9)); |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 979 | |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 980 | blkvsc_req->sector_count = num_sectors / (blkdev->sector_size >> 9); |
| 981 | blkvsc_init_rw(blkvsc_req); |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 982 | } |
| 983 | |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 984 | /* |
| 985 | * Create new blkvsc_req to represent |
| 986 | * the current bvec |
| 987 | */ |
| 988 | blkvsc_req = kmem_cache_alloc(blkdev->request_pool, GFP_ATOMIC); |
| 989 | if (!blkvsc_req) { |
| 990 | /* free up everything */ |
| 991 | list_for_each_entry_safe( |
| 992 | blkvsc_req, tmp, |
| 993 | &group->blkvsc_req_list, |
| 994 | req_entry) { |
| 995 | list_del(&blkvsc_req->req_entry); |
| 996 | kmem_cache_free(blkdev->request_pool, blkvsc_req); |
| 997 | } |
| 998 | |
| 999 | kmem_cache_free(blkdev->request_pool, group); |
| 1000 | return -ENOMEM; |
| 1001 | } |
| 1002 | |
| 1003 | memset(blkvsc_req, 0, |
| 1004 | sizeof(struct blkvsc_request)); |
| 1005 | |
| 1006 | blkvsc_req->dev = blkdev; |
| 1007 | blkvsc_req->req = req; |
| 1008 | blkvsc_req->request.DataBuffer.Offset = bvec->bv_offset; |
| 1009 | blkvsc_req->request.DataBuffer.Length = 0; |
| 1010 | |
| 1011 | /* Add to the group */ |
| 1012 | blkvsc_req->group = group; |
| 1013 | blkvsc_req->group->outstanding++; |
| 1014 | list_add_tail(&blkvsc_req->req_entry, |
| 1015 | &blkvsc_req->group->blkvsc_req_list); |
| 1016 | |
| 1017 | start_sector += num_sectors; |
| 1018 | num_sectors = 0; |
| 1019 | databuf_idx = 0; |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 1020 | } |
| 1021 | |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 1022 | /* Add the curr bvec/segment to the curr blkvsc_req */ |
| 1023 | blkvsc_req->request.DataBuffer.PfnArray[databuf_idx] = page_to_pfn(bvec->bv_page); |
| 1024 | blkvsc_req->request.DataBuffer.Length += bvec->bv_len; |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 1025 | |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 1026 | prev_bvec = bvec; |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 1027 | |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 1028 | databuf_idx++; |
| 1029 | num_sectors += bvec->bv_len >> 9; |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 1030 | |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 1031 | } /* bio_for_each_segment */ |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 1032 | |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 1033 | } /* rq_for_each_bio */ |
| 1034 | } |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 1035 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 1036 | /* Handle the last one */ |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 1037 | if (blkvsc_req) { |
| 1038 | DPRINT_DBG(BLKVSC_DRV, "blkdev %p req %p group %p count %d\n", |
| 1039 | blkdev, req, blkvsc_req->group, |
| 1040 | blkvsc_req->group->outstanding); |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 1041 | |
| 1042 | blkvsc_req->sector_start = start_sector; |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 1043 | sector_div(blkvsc_req->sector_start, |
| 1044 | (blkdev->sector_size >> 9)); |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 1045 | |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 1046 | blkvsc_req->sector_count = num_sectors / |
| 1047 | (blkdev->sector_size >> 9); |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 1048 | |
| 1049 | blkvsc_init_rw(blkvsc_req); |
| 1050 | } |
| 1051 | |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 1052 | list_for_each_entry(blkvsc_req, &group->blkvsc_req_list, req_entry) { |
| 1053 | if (pending) { |
| 1054 | DPRINT_DBG(BLKVSC_DRV, "adding blkvsc_req to " |
| 1055 | "pending_list - blkvsc_req %p start_sect %lu" |
| 1056 | " sect_count %ld (%lu %ld)\n", blkvsc_req, |
| 1057 | (unsigned long)blkvsc_req->sector_start, |
| 1058 | blkvsc_req->sector_count, |
| 1059 | (unsigned long)start_sector, |
| 1060 | (unsigned long)num_sectors); |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 1061 | |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 1062 | list_add_tail(&blkvsc_req->pend_entry, |
| 1063 | &blkdev->pending_list); |
| 1064 | } else { |
| 1065 | ret = blkvsc_submit_request(blkvsc_req, |
| 1066 | blkvsc_request_completion); |
| 1067 | if (ret == -1) { |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 1068 | pending = 1; |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 1069 | list_add_tail(&blkvsc_req->pend_entry, |
| 1070 | &blkdev->pending_list); |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 1071 | } |
| 1072 | |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 1073 | DPRINT_DBG(BLKVSC_DRV, "submitted blkvsc_req %p " |
| 1074 | "start_sect %lu sect_count %ld (%lu %ld) " |
| 1075 | "ret %d\n", blkvsc_req, |
| 1076 | (unsigned long)blkvsc_req->sector_start, |
| 1077 | blkvsc_req->sector_count, |
| 1078 | (unsigned long)start_sector, |
| 1079 | num_sectors, ret); |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 1080 | } |
| 1081 | } |
| 1082 | |
| 1083 | return pending; |
| 1084 | } |
| 1085 | |
Nicolas Palix | 0b3f683 | 2009-07-29 14:10:19 +0200 | [diff] [blame] | 1086 | static void blkvsc_cmd_completion(struct hv_storvsc_request *request) |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 1087 | { |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 1088 | struct blkvsc_request *blkvsc_req = |
| 1089 | (struct blkvsc_request *)request->Context; |
| 1090 | struct block_device_context *blkdev = |
| 1091 | (struct block_device_context *)blkvsc_req->dev; |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 1092 | struct scsi_sense_hdr sense_hdr; |
| 1093 | |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 1094 | DPRINT_DBG(BLKVSC_DRV, "blkvsc_cmd_completion() - req %p\n", |
| 1095 | blkvsc_req); |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 1096 | |
| 1097 | blkdev->num_outstanding_reqs--; |
| 1098 | |
| 1099 | if (blkvsc_req->request.Status) |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 1100 | if (scsi_normalize_sense(blkvsc_req->sense_buffer, |
| 1101 | SCSI_SENSE_BUFFERSIZE, &sense_hdr)) |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 1102 | scsi_print_sense_hdr("blkvsc", &sense_hdr); |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 1103 | |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 1104 | blkvsc_req->cond = 1; |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 1105 | wake_up_interruptible(&blkvsc_req->wevent); |
| 1106 | } |
| 1107 | |
Nicolas Palix | 0b3f683 | 2009-07-29 14:10:19 +0200 | [diff] [blame] | 1108 | static void blkvsc_request_completion(struct hv_storvsc_request *request) |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 1109 | { |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 1110 | struct blkvsc_request *blkvsc_req = |
| 1111 | (struct blkvsc_request *)request->Context; |
| 1112 | struct block_device_context *blkdev = |
| 1113 | (struct block_device_context *)blkvsc_req->dev; |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 1114 | unsigned long flags; |
| 1115 | struct blkvsc_request *comp_req, *tmp; |
| 1116 | |
| 1117 | ASSERT(blkvsc_req->group); |
| 1118 | |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 1119 | DPRINT_DBG(BLKVSC_DRV, "blkdev %p blkvsc_req %p group %p type %s " |
| 1120 | "sect_start %lu sect_count %ld len %d group outstd %d " |
| 1121 | "total outstd %d\n", |
| 1122 | blkdev, blkvsc_req, blkvsc_req->group, |
| 1123 | (blkvsc_req->write) ? "WRITE" : "READ", |
| 1124 | (unsigned long)blkvsc_req->sector_start, |
| 1125 | blkvsc_req->sector_count, |
| 1126 | blkvsc_req->request.DataBuffer.Length, |
| 1127 | blkvsc_req->group->outstanding, |
| 1128 | blkdev->num_outstanding_reqs); |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 1129 | |
| 1130 | spin_lock_irqsave(&blkdev->lock, flags); |
| 1131 | |
| 1132 | blkdev->num_outstanding_reqs--; |
| 1133 | blkvsc_req->group->outstanding--; |
| 1134 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 1135 | /* |
| 1136 | * Only start processing when all the blkvsc_reqs are |
| 1137 | * completed. This guarantees no out-of-order blkvsc_req |
| 1138 | * completion when calling end_that_request_first() |
| 1139 | */ |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 1140 | if (blkvsc_req->group->outstanding == 0) { |
| 1141 | list_for_each_entry_safe(comp_req, tmp, |
| 1142 | &blkvsc_req->group->blkvsc_req_list, |
| 1143 | req_entry) { |
| 1144 | DPRINT_DBG(BLKVSC_DRV, "completing blkvsc_req %p " |
| 1145 | "sect_start %lu sect_count %ld \n", |
| 1146 | comp_req, |
| 1147 | (unsigned long)comp_req->sector_start, |
| 1148 | comp_req->sector_count); |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 1149 | |
| 1150 | list_del(&comp_req->req_entry); |
| 1151 | |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 1152 | if (!__blk_end_request(comp_req->req, |
| 1153 | (!comp_req->request.Status ? 0 : -EIO), |
| 1154 | comp_req->sector_count * blkdev->sector_size)) { |
| 1155 | /* |
| 1156 | * All the sectors have been xferred ie the |
| 1157 | * request is done |
| 1158 | */ |
| 1159 | DPRINT_DBG(BLKVSC_DRV, "req %p COMPLETED\n", |
| 1160 | comp_req->req); |
| 1161 | kmem_cache_free(blkdev->request_pool, |
| 1162 | comp_req->group); |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 1163 | } |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 1164 | |
| 1165 | kmem_cache_free(blkdev->request_pool, comp_req); |
| 1166 | } |
| 1167 | |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 1168 | if (!blkdev->shutting_down) { |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 1169 | blkvsc_do_pending_reqs(blkdev); |
| 1170 | blk_start_queue(blkdev->gd->queue); |
| 1171 | blkvsc_request(blkdev->gd->queue); |
| 1172 | } |
| 1173 | } |
| 1174 | |
| 1175 | spin_unlock_irqrestore(&blkdev->lock, flags); |
| 1176 | } |
| 1177 | |
| 1178 | static int blkvsc_cancel_pending_reqs(struct block_device_context *blkdev) |
| 1179 | { |
| 1180 | struct blkvsc_request *pend_req, *tmp; |
| 1181 | struct blkvsc_request *comp_req, *tmp2; |
| 1182 | |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 1183 | int ret = 0; |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 1184 | |
| 1185 | DPRINT_DBG(BLKVSC_DRV, "blkvsc_cancel_pending_reqs()"); |
| 1186 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 1187 | /* Flush the pending list first */ |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 1188 | list_for_each_entry_safe(pend_req, tmp, &blkdev->pending_list, |
| 1189 | pend_entry) { |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 1190 | /* |
| 1191 | * The pend_req could be part of a partially completed |
| 1192 | * request. If so, complete those req first until we |
| 1193 | * hit the pend_req |
| 1194 | */ |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 1195 | list_for_each_entry_safe(comp_req, tmp2, |
| 1196 | &pend_req->group->blkvsc_req_list, |
| 1197 | req_entry) { |
| 1198 | DPRINT_DBG(BLKVSC_DRV, "completing blkvsc_req %p " |
| 1199 | "sect_start %lu sect_count %ld \n", |
| 1200 | comp_req, |
| 1201 | (unsigned long) comp_req->sector_start, |
| 1202 | comp_req->sector_count); |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 1203 | |
| 1204 | if (comp_req == pend_req) |
| 1205 | break; |
| 1206 | |
| 1207 | list_del(&comp_req->req_entry); |
| 1208 | |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 1209 | if (comp_req->req) { |
| 1210 | ret = __blk_end_request(comp_req->req, |
| 1211 | (!comp_req->request.Status ? 0 : -EIO), |
| 1212 | comp_req->sector_count * |
| 1213 | blkdev->sector_size); |
| 1214 | ASSERT(ret != 0); |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 1215 | } |
| 1216 | |
| 1217 | kmem_cache_free(blkdev->request_pool, comp_req); |
| 1218 | } |
| 1219 | |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 1220 | DPRINT_DBG(BLKVSC_DRV, "cancelling pending request - %p\n", |
| 1221 | pend_req); |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 1222 | |
| 1223 | list_del(&pend_req->pend_entry); |
| 1224 | |
| 1225 | list_del(&pend_req->req_entry); |
| 1226 | |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 1227 | if (comp_req->req) { |
| 1228 | if (!__blk_end_request(pend_req->req, -EIO, |
| 1229 | pend_req->sector_count * |
| 1230 | blkdev->sector_size)) { |
| 1231 | /* |
| 1232 | * All the sectors have been xferred ie the |
| 1233 | * request is done |
| 1234 | */ |
| 1235 | DPRINT_DBG(BLKVSC_DRV, |
| 1236 | "blkvsc_cancel_pending_reqs() - " |
| 1237 | "req %p COMPLETED\n", pend_req->req); |
| 1238 | kmem_cache_free(blkdev->request_pool, |
| 1239 | pend_req->group); |
| 1240 | } |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 1241 | } |
| 1242 | |
| 1243 | kmem_cache_free(blkdev->request_pool, pend_req); |
| 1244 | } |
| 1245 | |
| 1246 | return ret; |
| 1247 | } |
| 1248 | |
| 1249 | static int blkvsc_do_pending_reqs(struct block_device_context *blkdev) |
| 1250 | { |
| 1251 | struct blkvsc_request *pend_req, *tmp; |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 1252 | int ret = 0; |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 1253 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 1254 | /* Flush the pending list first */ |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 1255 | list_for_each_entry_safe(pend_req, tmp, &blkdev->pending_list, |
| 1256 | pend_entry) { |
| 1257 | DPRINT_DBG(BLKVSC_DRV, "working off pending_list - %p\n", |
| 1258 | pend_req); |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 1259 | |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 1260 | ret = blkvsc_submit_request(pend_req, |
| 1261 | blkvsc_request_completion); |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 1262 | if (ret != 0) |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 1263 | break; |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 1264 | else |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 1265 | list_del(&pend_req->pend_entry); |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 1266 | } |
| 1267 | |
| 1268 | return ret; |
| 1269 | } |
| 1270 | |
| 1271 | static void blkvsc_request(struct request_queue *queue) |
| 1272 | { |
| 1273 | struct block_device_context *blkdev = NULL; |
| 1274 | struct request *req; |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 1275 | int ret = 0; |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 1276 | |
| 1277 | DPRINT_DBG(BLKVSC_DRV, "- enter \n"); |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 1278 | while ((req = blk_peek_request(queue)) != NULL) { |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 1279 | DPRINT_DBG(BLKVSC_DRV, "- req %p\n", req); |
| 1280 | |
| 1281 | blkdev = req->rq_disk->private_data; |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 1282 | if (blkdev->shutting_down || !blk_fs_request(req) || |
| 1283 | blkdev->media_not_present) { |
Greg Kroah-Hartman | 0fce4c2 | 2009-07-14 10:24:38 -0700 | [diff] [blame] | 1284 | __blk_end_request_cur(req, 0); |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 1285 | continue; |
| 1286 | } |
| 1287 | |
| 1288 | ret = blkvsc_do_pending_reqs(blkdev); |
| 1289 | |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 1290 | if (ret != 0) { |
| 1291 | DPRINT_DBG(BLKVSC_DRV, |
| 1292 | "- stop queue - pending_list not empty\n"); |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 1293 | blk_stop_queue(queue); |
| 1294 | break; |
| 1295 | } |
| 1296 | |
Greg Kroah-Hartman | 0fce4c2 | 2009-07-14 10:24:38 -0700 | [diff] [blame] | 1297 | blk_start_request(req); |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 1298 | |
| 1299 | ret = blkvsc_do_request(blkdev, req); |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 1300 | if (ret > 0) { |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 1301 | DPRINT_DBG(BLKVSC_DRV, "- stop queue - no room\n"); |
| 1302 | blk_stop_queue(queue); |
| 1303 | break; |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 1304 | } else if (ret < 0) { |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 1305 | DPRINT_DBG(BLKVSC_DRV, "- stop queue - no mem\n"); |
| 1306 | blk_requeue_request(queue, req); |
| 1307 | blk_stop_queue(queue); |
| 1308 | break; |
| 1309 | } |
| 1310 | } |
| 1311 | } |
| 1312 | |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 1313 | static int blkvsc_open(struct block_device *bdev, fmode_t mode) |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 1314 | { |
Bill Pemberton | 39635f7 | 2009-07-27 16:47:27 -0400 | [diff] [blame] | 1315 | struct block_device_context *blkdev = bdev->bd_disk->private_data; |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 1316 | |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 1317 | DPRINT_DBG(BLKVSC_DRV, "- users %d disk %s\n", blkdev->users, |
| 1318 | blkdev->gd->disk_name); |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 1319 | |
| 1320 | spin_lock(&blkdev->lock); |
| 1321 | |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 1322 | if (!blkdev->users && blkdev->device_type == DVD_TYPE) { |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 1323 | spin_unlock(&blkdev->lock); |
Bill Pemberton | 39635f7 | 2009-07-27 16:47:27 -0400 | [diff] [blame] | 1324 | check_disk_change(bdev); |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 1325 | spin_lock(&blkdev->lock); |
| 1326 | } |
| 1327 | |
| 1328 | blkdev->users++; |
| 1329 | |
| 1330 | spin_unlock(&blkdev->lock); |
| 1331 | return 0; |
| 1332 | } |
| 1333 | |
Bill Pemberton | 77d2d9d | 2009-07-27 16:47:28 -0400 | [diff] [blame] | 1334 | static int blkvsc_release(struct gendisk *disk, fmode_t mode) |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 1335 | { |
Bill Pemberton | 77d2d9d | 2009-07-27 16:47:28 -0400 | [diff] [blame] | 1336 | struct block_device_context *blkdev = disk->private_data; |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 1337 | |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 1338 | DPRINT_DBG(BLKVSC_DRV, "- users %d disk %s\n", blkdev->users, |
| 1339 | blkdev->gd->disk_name); |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 1340 | |
| 1341 | spin_lock(&blkdev->lock); |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 1342 | if (blkdev->users == 1) { |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 1343 | spin_unlock(&blkdev->lock); |
| 1344 | blkvsc_do_flush(blkdev); |
| 1345 | spin_lock(&blkdev->lock); |
| 1346 | } |
| 1347 | |
| 1348 | blkdev->users--; |
| 1349 | |
| 1350 | spin_unlock(&blkdev->lock); |
| 1351 | return 0; |
| 1352 | } |
| 1353 | |
| 1354 | static int blkvsc_media_changed(struct gendisk *gd) |
| 1355 | { |
| 1356 | DPRINT_DBG(BLKVSC_DRV, "- enter\n"); |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 1357 | return 1; |
| 1358 | } |
| 1359 | |
| 1360 | static int blkvsc_revalidate_disk(struct gendisk *gd) |
| 1361 | { |
| 1362 | struct block_device_context *blkdev = gd->private_data; |
| 1363 | |
| 1364 | DPRINT_DBG(BLKVSC_DRV, "- enter\n"); |
| 1365 | |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 1366 | if (blkdev->device_type == DVD_TYPE) { |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 1367 | blkvsc_do_read_capacity(blkdev); |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 1368 | set_capacity(blkdev->gd, blkdev->capacity * |
| 1369 | (blkdev->sector_size/512)); |
Greg Kroah-Hartman | 0fce4c2 | 2009-07-14 10:24:38 -0700 | [diff] [blame] | 1370 | blk_queue_logical_block_size(gd->queue, blkdev->sector_size); |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 1371 | } |
| 1372 | return 0; |
| 1373 | } |
| 1374 | |
Greg Kroah-Hartman | bd1de70 | 2009-07-29 09:04:51 -0700 | [diff] [blame] | 1375 | static int blkvsc_getgeo(struct block_device *bd, struct hd_geometry *hg) |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 1376 | { |
| 1377 | sector_t total_sectors = get_capacity(bd->bd_disk); |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 1378 | sector_t cylinder_times_heads = 0; |
| 1379 | sector_t temp = 0; |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 1380 | |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 1381 | int sectors_per_track = 0; |
| 1382 | int heads = 0; |
| 1383 | int cylinders = 0; |
| 1384 | int rem = 0; |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 1385 | |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 1386 | if (total_sectors > (65535 * 16 * 255)) |
| 1387 | total_sectors = (65535 * 16 * 255); |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 1388 | |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 1389 | if (total_sectors >= (65535 * 16 * 63)) { |
| 1390 | sectors_per_track = 255; |
| 1391 | heads = 16; |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 1392 | |
| 1393 | cylinder_times_heads = total_sectors; |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 1394 | /* sector_div stores the quotient in cylinder_times_heads */ |
| 1395 | rem = sector_div(cylinder_times_heads, sectors_per_track); |
| 1396 | } else { |
| 1397 | sectors_per_track = 17; |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 1398 | |
| 1399 | cylinder_times_heads = total_sectors; |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 1400 | /* sector_div stores the quotient in cylinder_times_heads */ |
| 1401 | rem = sector_div(cylinder_times_heads, sectors_per_track); |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 1402 | |
| 1403 | temp = cylinder_times_heads + 1023; |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 1404 | /* sector_div stores the quotient in temp */ |
| 1405 | rem = sector_div(temp, 1024); |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 1406 | |
| 1407 | heads = temp; |
| 1408 | |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 1409 | if (heads < 4) |
| 1410 | heads = 4; |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 1411 | |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 1412 | |
| 1413 | if (cylinder_times_heads >= (heads * 1024) || (heads > 16)) { |
| 1414 | sectors_per_track = 31; |
| 1415 | heads = 16; |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 1416 | |
| 1417 | cylinder_times_heads = total_sectors; |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 1418 | /* |
| 1419 | * sector_div stores the quotient in |
| 1420 | * cylinder_times_heads |
| 1421 | */ |
| 1422 | rem = sector_div(cylinder_times_heads, |
| 1423 | sectors_per_track); |
| 1424 | } |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 1425 | |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 1426 | if (cylinder_times_heads >= (heads * 1024)) { |
| 1427 | sectors_per_track = 63; |
| 1428 | heads = 16; |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 1429 | |
| 1430 | cylinder_times_heads = total_sectors; |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 1431 | /* |
| 1432 | * sector_div stores the quotient in |
| 1433 | * cylinder_times_heads |
| 1434 | */ |
| 1435 | rem = sector_div(cylinder_times_heads, |
| 1436 | sectors_per_track); |
| 1437 | } |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 1438 | } |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 1439 | |
| 1440 | temp = cylinder_times_heads; |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 1441 | /* sector_div stores the quotient in temp */ |
| 1442 | rem = sector_div(temp, heads); |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 1443 | cylinders = temp; |
| 1444 | |
| 1445 | hg->heads = heads; |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 1446 | hg->sectors = sectors_per_track; |
| 1447 | hg->cylinders = cylinders; |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 1448 | |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 1449 | DPRINT_INFO(BLKVSC_DRV, "CHS (%d, %d, %d)", cylinders, heads, |
| 1450 | sectors_per_track); |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 1451 | |
| 1452 | return 0; |
| 1453 | } |
| 1454 | |
Bill Pemberton | dfe8b2d | 2009-07-27 16:47:29 -0400 | [diff] [blame] | 1455 | static int blkvsc_ioctl(struct block_device *bd, fmode_t mode, |
| 1456 | unsigned cmd, unsigned long argument) |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 1457 | { |
Bill Pemberton | b578852 | 2009-07-28 13:46:23 -0400 | [diff] [blame] | 1458 | /* struct block_device_context *blkdev = bd->bd_disk->private_data; */ |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 1459 | int ret; |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 1460 | |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 1461 | switch (cmd) { |
| 1462 | /* |
| 1463 | * TODO: I think there is certain format for HDIO_GET_IDENTITY rather |
| 1464 | * than just a GUID. Commented it out for now. |
| 1465 | */ |
| 1466 | #if 0 |
| 1467 | case HDIO_GET_IDENTITY: |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 1468 | DPRINT_INFO(BLKVSC_DRV, "HDIO_GET_IDENTITY\n"); |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 1469 | if (copy_to_user((void __user *)arg, blkdev->device_id, |
| 1470 | blkdev->device_id_len)) |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 1471 | ret = -EFAULT; |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 1472 | break; |
| 1473 | #endif |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 1474 | default: |
| 1475 | ret = -EINVAL; |
| 1476 | break; |
| 1477 | } |
| 1478 | |
| 1479 | return ret; |
| 1480 | } |
| 1481 | |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 1482 | static int __init blkvsc_init(void) |
| 1483 | { |
| 1484 | int ret; |
| 1485 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 1486 | ASSERT(sizeof(sector_t) == 8); /* Make sure CONFIG_LBD is set */ |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 1487 | |
| 1488 | DPRINT_ENTER(BLKVSC_DRV); |
| 1489 | |
| 1490 | DPRINT_INFO(BLKVSC_DRV, "Blkvsc initializing...."); |
| 1491 | |
| 1492 | ret = blkvsc_drv_init(BlkVscInitialize); |
| 1493 | |
| 1494 | DPRINT_EXIT(BLKVSC_DRV); |
| 1495 | |
| 1496 | return ret; |
| 1497 | } |
| 1498 | |
| 1499 | static void __exit blkvsc_exit(void) |
| 1500 | { |
| 1501 | DPRINT_ENTER(BLKVSC_DRV); |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 1502 | blkvsc_drv_exit(); |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 1503 | DPRINT_ENTER(BLKVSC_DRV); |
| 1504 | } |
| 1505 | |
Greg Kroah-Hartman | 8a28039 | 2009-09-01 16:34:56 -0700 | [diff] [blame] | 1506 | MODULE_LICENSE("GPL"); |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 1507 | module_param(blkvsc_ringbuffer_size, int, S_IRUGO); |
Hank Janssen | f82bd04 | 2009-07-13 15:33:02 -0700 | [diff] [blame] | 1508 | module_init(blkvsc_init); |
| 1509 | module_exit(blkvsc_exit); |