Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 1 | /* |
| 2 | * |
| 3 | * Copyright (c) 2009, Microsoft Corporation. |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify it |
| 6 | * under the terms and conditions of the GNU General Public License, |
| 7 | * version 2, as published by the Free Software Foundation. |
| 8 | * |
| 9 | * This program is distributed in the hope it will be useful, but WITHOUT |
| 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| 12 | * more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU General Public License along with |
| 15 | * this program; if not, write to the Free Software Foundation, Inc., 59 Temple |
| 16 | * Place - Suite 330, Boston, MA 02111-1307 USA. |
| 17 | * |
| 18 | * Authors: |
| 19 | * Haiyang Zhang <haiyangz@microsoft.com> |
| 20 | * Hank Janssen <hjanssen@microsoft.com> |
| 21 | * |
| 22 | */ |
| 23 | |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 24 | #include <linux/init.h> |
| 25 | #include <linux/module.h> |
| 26 | #include <linux/device.h> |
| 27 | #include <linux/blkdev.h> |
| 28 | |
| 29 | #include <scsi/scsi.h> |
| 30 | #include <scsi/scsi_cmnd.h> |
| 31 | #include <scsi/scsi_host.h> |
| 32 | #include <scsi/scsi_device.h> |
| 33 | #include <scsi/scsi_tcq.h> |
| 34 | #include <scsi/scsi_eh.h> |
| 35 | #include <scsi/scsi_devinfo.h> |
| 36 | |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 37 | #include <scsi/scsi_dbg.h> |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 38 | |
Greg Kroah-Hartman | 97f4ee3 | 2009-07-14 10:18:50 -0700 | [diff] [blame] | 39 | #include "include/logging.h" |
| 40 | #include "include/vmbus.h" |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 41 | |
Greg Kroah-Hartman | 97f4ee3 | 2009-07-14 10:18:50 -0700 | [diff] [blame] | 42 | #include "include/StorVscApi.h" |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 43 | |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 44 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 45 | /* #defines */ |
| 46 | |
| 47 | |
| 48 | |
| 49 | /* Data types */ |
| 50 | |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 51 | struct host_device_context { |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 52 | struct work_struct host_rescan_work; /* must be 1st field */ |
| 53 | struct device_context *device_ctx; /* point back to our device context */ |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 54 | struct kmem_cache *request_pool; |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 55 | unsigned int port; |
| 56 | unsigned char path; |
| 57 | unsigned char target; |
| 58 | }; |
| 59 | |
| 60 | struct storvsc_cmd_request { |
| 61 | struct list_head entry; |
| 62 | struct scsi_cmnd *cmd; |
| 63 | |
| 64 | unsigned int bounce_sgl_count; |
| 65 | struct scatterlist *bounce_sgl; |
| 66 | |
| 67 | STORVSC_REQUEST request; |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 68 | /* !!!DO NOT ADD ANYTHING BELOW HERE!!! */ |
| 69 | /* The extension buffer falls right here and is pointed to by request.Extension; */ |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 70 | }; |
| 71 | |
| 72 | struct storvsc_driver_context { |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 73 | /* !! These must be the first 2 fields !! */ |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 74 | struct driver_context drv_ctx; |
| 75 | STORVSC_DRIVER_OBJECT drv_obj; |
| 76 | }; |
| 77 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 78 | /* Static decl */ |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 79 | static int storvsc_probe(struct device *dev); |
| 80 | static int storvsc_queuecommand(struct scsi_cmnd *scmnd, void (*done)(struct scsi_cmnd *)); |
| 81 | static int storvsc_device_alloc(struct scsi_device *); |
| 82 | static int storvsc_device_configure(struct scsi_device *); |
| 83 | static int storvsc_host_reset_handler(struct scsi_cmnd *scmnd); |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 84 | static void storvsc_host_rescan_callback(struct work_struct *work); |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 85 | static void storvsc_host_rescan(DEVICE_OBJECT* device_obj); |
| 86 | static int storvsc_remove(struct device *dev); |
| 87 | |
| 88 | static struct scatterlist *create_bounce_buffer(struct scatterlist *sgl, unsigned int sg_count, unsigned int len); |
| 89 | static void destroy_bounce_buffer(struct scatterlist *sgl, unsigned int sg_count); |
| 90 | static int do_bounce_buffer(struct scatterlist *sgl, unsigned int sg_count); |
| 91 | static unsigned int copy_from_bounce_buffer(struct scatterlist *orig_sgl, struct scatterlist *bounce_sgl, unsigned int orig_sgl_count); |
| 92 | static unsigned int copy_to_bounce_buffer(struct scatterlist *orig_sgl, struct scatterlist *bounce_sgl, unsigned int orig_sgl_count); |
| 93 | |
| 94 | static int storvsc_report_luns(struct scsi_device *sdev, unsigned int luns[], unsigned int *lun_count); |
| 95 | static int storvsc_get_chs(struct scsi_device *sdev, struct block_device * bdev, sector_t capacity, int *info); |
| 96 | |
| 97 | |
| 98 | static int storvsc_ringbuffer_size = STORVSC_RING_BUFFER_SIZE; |
| 99 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 100 | /* The one and only one */ |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 101 | static struct storvsc_driver_context g_storvsc_drv; |
| 102 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 103 | /* Scsi driver */ |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 104 | static struct scsi_host_template scsi_driver = { |
| 105 | .module = THIS_MODULE, |
| 106 | .name = "storvsc_host_t", |
| 107 | .bios_param = storvsc_get_chs, |
| 108 | .queuecommand = storvsc_queuecommand, |
| 109 | .eh_host_reset_handler = storvsc_host_reset_handler, |
| 110 | .slave_alloc = storvsc_device_alloc, |
| 111 | .slave_configure = storvsc_device_configure, |
| 112 | .cmd_per_lun = 1, |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 113 | .can_queue = STORVSC_MAX_IO_REQUESTS*STORVSC_MAX_TARGETS, /* 64 max_queue * 1 target */ |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 114 | .this_id = -1, |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 115 | /* no use setting to 0 since ll_blk_rw reset it to 1 */ |
| 116 | .sg_tablesize = MAX_MULTIPAGE_BUFFER_COUNT,/* currently 32 */ |
| 117 | /* ENABLE_CLUSTERING allows mutiple physically contig bio_vecs to merge into 1 sg element. If set, we must */ |
| 118 | /* limit the max_segment_size to PAGE_SIZE, otherwise we may get 1 sg element that represents multiple */ |
| 119 | /* physically contig pfns (ie sg[x].length > PAGE_SIZE). */ |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 120 | .use_clustering = ENABLE_CLUSTERING, |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 121 | /* Make sure we dont get a sg segment crosses a page boundary */ |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 122 | .dma_boundary = PAGE_SIZE-1, |
| 123 | }; |
| 124 | |
| 125 | |
| 126 | /*++ |
| 127 | |
| 128 | Name: storvsc_drv_init() |
| 129 | |
| 130 | Desc: StorVsc driver initialization. |
| 131 | |
| 132 | --*/ |
| 133 | int storvsc_drv_init(PFN_DRIVERINITIALIZE pfn_drv_init) |
| 134 | { |
| 135 | int ret=0; |
| 136 | STORVSC_DRIVER_OBJECT *storvsc_drv_obj=&g_storvsc_drv.drv_obj; |
| 137 | struct driver_context *drv_ctx=&g_storvsc_drv.drv_ctx; |
| 138 | |
| 139 | DPRINT_ENTER(STORVSC_DRV); |
| 140 | |
| 141 | vmbus_get_interface(&storvsc_drv_obj->Base.VmbusChannelInterface); |
| 142 | |
| 143 | storvsc_drv_obj->RingBufferSize = storvsc_ringbuffer_size; |
| 144 | storvsc_drv_obj->OnHostRescan = storvsc_host_rescan; |
| 145 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 146 | /* Callback to client driver to complete the initialization */ |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 147 | pfn_drv_init(&storvsc_drv_obj->Base); |
| 148 | |
| 149 | DPRINT_INFO(STORVSC_DRV, "request extension size %u, max outstanding reqs %u", storvsc_drv_obj->RequestExtSize, storvsc_drv_obj->MaxOutstandingRequestsPerChannel); |
| 150 | |
| 151 | if (storvsc_drv_obj->MaxOutstandingRequestsPerChannel < STORVSC_MAX_IO_REQUESTS) |
| 152 | { |
| 153 | DPRINT_ERR(STORVSC_DRV, "The number of outstanding io requests (%d) is larger than that supported (%d) internally.", |
| 154 | STORVSC_MAX_IO_REQUESTS, storvsc_drv_obj->MaxOutstandingRequestsPerChannel); |
| 155 | return -1; |
| 156 | } |
| 157 | |
| 158 | drv_ctx->driver.name = storvsc_drv_obj->Base.name; |
| 159 | memcpy(&drv_ctx->class_id, &storvsc_drv_obj->Base.deviceType, sizeof(GUID)); |
| 160 | |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 161 | drv_ctx->probe = storvsc_probe; |
| 162 | drv_ctx->remove = storvsc_remove; |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 163 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 164 | /* The driver belongs to vmbus */ |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 165 | vmbus_child_driver_register(drv_ctx); |
| 166 | |
| 167 | DPRINT_EXIT(STORVSC_DRV); |
| 168 | |
| 169 | return ret; |
| 170 | } |
| 171 | |
| 172 | |
| 173 | static int storvsc_drv_exit_cb(struct device *dev, void *data) |
| 174 | { |
| 175 | struct device **curr = (struct device **)data; |
| 176 | *curr = dev; |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 177 | return 1; /* stop iterating */ |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 178 | } |
| 179 | |
| 180 | /*++ |
| 181 | |
| 182 | Name: storvsc_drv_exit() |
| 183 | |
| 184 | Desc: |
| 185 | |
| 186 | --*/ |
| 187 | void storvsc_drv_exit(void) |
| 188 | { |
| 189 | STORVSC_DRIVER_OBJECT *storvsc_drv_obj=&g_storvsc_drv.drv_obj; |
| 190 | struct driver_context *drv_ctx=&g_storvsc_drv.drv_ctx; |
| 191 | |
| 192 | struct device *current_dev=NULL; |
| 193 | |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 194 | DPRINT_ENTER(STORVSC_DRV); |
| 195 | |
| 196 | while (1) |
| 197 | { |
| 198 | current_dev = NULL; |
| 199 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 200 | /* Get the device */ |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 201 | driver_for_each_device(&drv_ctx->driver, NULL, (void*)¤t_dev, storvsc_drv_exit_cb); |
| 202 | |
| 203 | if (current_dev == NULL) |
| 204 | break; |
| 205 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 206 | /* Initiate removal from the top-down */ |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 207 | device_unregister(current_dev); |
| 208 | } |
| 209 | |
| 210 | if (storvsc_drv_obj->Base.OnCleanup) |
| 211 | storvsc_drv_obj->Base.OnCleanup(&storvsc_drv_obj->Base); |
| 212 | |
| 213 | vmbus_child_driver_unregister(drv_ctx); |
| 214 | |
| 215 | DPRINT_EXIT(STORVSC_DRV); |
| 216 | |
| 217 | return; |
| 218 | } |
| 219 | |
| 220 | /*++ |
| 221 | |
| 222 | Name: storvsc_probe() |
| 223 | |
| 224 | Desc: Add a new device for this driver |
| 225 | |
| 226 | --*/ |
| 227 | static int storvsc_probe(struct device *device) |
| 228 | { |
| 229 | int ret=0; |
| 230 | |
| 231 | struct driver_context *driver_ctx = driver_to_driver_context(device->driver); |
| 232 | struct storvsc_driver_context *storvsc_drv_ctx = (struct storvsc_driver_context*)driver_ctx; |
| 233 | STORVSC_DRIVER_OBJECT* storvsc_drv_obj = &storvsc_drv_ctx->drv_obj; |
| 234 | |
| 235 | struct device_context *device_ctx = device_to_device_context(device); |
| 236 | DEVICE_OBJECT* device_obj = &device_ctx->device_obj; |
| 237 | |
| 238 | struct Scsi_Host *host; |
| 239 | struct host_device_context *host_device_ctx; |
| 240 | STORVSC_DEVICE_INFO device_info; |
| 241 | |
| 242 | DPRINT_ENTER(STORVSC_DRV); |
| 243 | |
| 244 | if (!storvsc_drv_obj->Base.OnDeviceAdd) |
| 245 | return -1; |
| 246 | |
| 247 | host = scsi_host_alloc(&scsi_driver, sizeof(struct host_device_context)); |
| 248 | if (!host) |
| 249 | { |
| 250 | DPRINT_ERR(STORVSC_DRV, "unable to allocate scsi host object"); |
| 251 | return -ENOMEM; |
| 252 | } |
| 253 | |
Greg Kroah-Hartman | 0883c52 | 2009-07-24 10:58:22 -0700 | [diff] [blame] | 254 | dev_set_drvdata(device, host); |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 255 | |
| 256 | host_device_ctx = (struct host_device_context*)host->hostdata; |
| 257 | memset(host_device_ctx, 0, sizeof(struct host_device_context)); |
| 258 | |
| 259 | host_device_ctx->port = host->host_no; |
| 260 | host_device_ctx->device_ctx = device_ctx; |
| 261 | |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 262 | INIT_WORK(&host_device_ctx->host_rescan_work, storvsc_host_rescan_callback); |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 263 | |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 264 | host_device_ctx->request_pool = |
| 265 | kmem_cache_create |
Greg Kroah-Hartman | 97f4ee3 | 2009-07-14 10:18:50 -0700 | [diff] [blame] | 266 | (dev_name(&device_ctx->device), |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 267 | sizeof(struct storvsc_cmd_request) + storvsc_drv_obj->RequestExtSize, |
| 268 | 0, |
| 269 | SLAB_HWCACHE_ALIGN, NULL); |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 270 | |
| 271 | if (!host_device_ctx->request_pool) |
| 272 | { |
| 273 | scsi_host_put(host); |
| 274 | DPRINT_EXIT(STORVSC_DRV); |
| 275 | |
| 276 | return -ENOMEM; |
| 277 | } |
| 278 | |
| 279 | device_info.PortNumber = host->host_no; |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 280 | /* Call to the vsc driver to add the device */ |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 281 | ret = storvsc_drv_obj->Base.OnDeviceAdd(device_obj, (void*)&device_info); |
| 282 | if (ret != 0) |
| 283 | { |
| 284 | DPRINT_ERR(STORVSC_DRV, "unable to add scsi vsc device"); |
| 285 | kmem_cache_destroy(host_device_ctx->request_pool); |
| 286 | scsi_host_put(host); |
| 287 | DPRINT_EXIT(STORVSC_DRV); |
| 288 | |
| 289 | return -1; |
| 290 | } |
| 291 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 292 | /* host_device_ctx->port = device_info.PortNumber; */ |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 293 | host_device_ctx->path = device_info.PathId; |
| 294 | host_device_ctx->target = device_info.TargetId; |
| 295 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 296 | host->max_lun = STORVSC_MAX_LUNS_PER_TARGET; /* max # of devices per target */ |
| 297 | host->max_id = STORVSC_MAX_TARGETS; /* max # of targets per channel */ |
| 298 | host->max_channel = STORVSC_MAX_CHANNELS -1; /* max # of channels */ |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 299 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 300 | /* Register the HBA and start the scsi bus scan */ |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 301 | ret = scsi_add_host(host, device); |
| 302 | if (ret != 0) |
| 303 | { |
| 304 | DPRINT_ERR(STORVSC_DRV, "unable to add scsi host device"); |
| 305 | |
| 306 | storvsc_drv_obj->Base.OnDeviceRemove(device_obj); |
| 307 | |
| 308 | kmem_cache_destroy(host_device_ctx->request_pool); |
| 309 | scsi_host_put(host); |
| 310 | DPRINT_EXIT(STORVSC_DRV); |
| 311 | |
| 312 | return -1; |
| 313 | } |
| 314 | |
| 315 | scsi_scan_host(host); |
| 316 | |
| 317 | DPRINT_EXIT(STORVSC_DRV); |
| 318 | |
| 319 | return ret; |
| 320 | } |
| 321 | |
| 322 | |
| 323 | /*++ |
| 324 | |
| 325 | Name: storvsc_remove() |
| 326 | |
| 327 | Desc: Callback when our device is removed |
| 328 | |
| 329 | --*/ |
| 330 | static int storvsc_remove(struct device *device) |
| 331 | { |
| 332 | int ret=0; |
| 333 | |
| 334 | struct driver_context *driver_ctx = driver_to_driver_context(device->driver); |
| 335 | struct storvsc_driver_context *storvsc_drv_ctx = (struct storvsc_driver_context*)driver_ctx; |
| 336 | STORVSC_DRIVER_OBJECT* storvsc_drv_obj = &storvsc_drv_ctx->drv_obj; |
| 337 | |
| 338 | struct device_context *device_ctx = device_to_device_context(device); |
| 339 | DEVICE_OBJECT* device_obj = &device_ctx->device_obj; |
| 340 | |
Greg Kroah-Hartman | 0883c52 | 2009-07-24 10:58:22 -0700 | [diff] [blame] | 341 | struct Scsi_Host *host = dev_get_drvdata(device); |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 342 | struct host_device_context *host_device_ctx=(struct host_device_context*)host->hostdata; |
| 343 | |
| 344 | |
| 345 | DPRINT_ENTER(STORVSC_DRV); |
| 346 | |
| 347 | if (!storvsc_drv_obj->Base.OnDeviceRemove) |
| 348 | { |
| 349 | DPRINT_EXIT(STORVSC_DRV); |
| 350 | return -1; |
| 351 | } |
| 352 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 353 | /* Call to the vsc driver to let it know that the device is being removed */ |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 354 | ret = storvsc_drv_obj->Base.OnDeviceRemove(device_obj); |
| 355 | if (ret != 0) |
| 356 | { |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 357 | /* TODO: */ |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 358 | DPRINT_ERR(STORVSC, "unable to remove vsc device (ret %d)", ret); |
| 359 | } |
| 360 | |
| 361 | if (host_device_ctx->request_pool) |
| 362 | { |
| 363 | kmem_cache_destroy(host_device_ctx->request_pool); |
| 364 | host_device_ctx->request_pool = NULL; |
| 365 | } |
| 366 | |
| 367 | DPRINT_INFO(STORVSC, "removing host adapter (%p)...", host); |
| 368 | scsi_remove_host(host); |
| 369 | |
| 370 | DPRINT_INFO(STORVSC, "releasing host adapter (%p)...", host); |
| 371 | scsi_host_put(host); |
| 372 | |
| 373 | DPRINT_EXIT(STORVSC_DRV); |
| 374 | |
| 375 | return ret; |
| 376 | } |
| 377 | |
| 378 | /*++ |
| 379 | |
| 380 | Name: storvsc_commmand_completion() |
| 381 | |
| 382 | Desc: Command completion processing |
| 383 | |
| 384 | --*/ |
| 385 | static void storvsc_commmand_completion(STORVSC_REQUEST* request) |
| 386 | { |
| 387 | struct storvsc_cmd_request *cmd_request = (struct storvsc_cmd_request*)request->Context; |
| 388 | struct scsi_cmnd *scmnd = cmd_request->cmd; |
| 389 | struct host_device_context *host_device_ctx = (struct host_device_context*)scmnd->device->host->hostdata; |
| 390 | void (*scsi_done_fn)(struct scsi_cmnd *); |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 391 | struct scsi_sense_hdr sense_hdr; |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 392 | |
| 393 | ASSERT(request == &cmd_request->request); |
| 394 | ASSERT((unsigned long)scmnd->host_scribble == (unsigned long)cmd_request); |
| 395 | ASSERT(scmnd); |
| 396 | ASSERT(scmnd->scsi_done); |
| 397 | |
| 398 | DPRINT_ENTER(STORVSC_DRV); |
| 399 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 400 | if (cmd_request->bounce_sgl_count)/* using bounce buffer */ |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 401 | { |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 402 | /* printk("copy_from_bounce_buffer\n"); */ |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 403 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 404 | /* FIXME: We can optimize on writes by just skipping this */ |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 405 | copy_from_bounce_buffer(scsi_sglist(scmnd), cmd_request->bounce_sgl, scsi_sg_count(scmnd)); |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 406 | destroy_bounce_buffer(cmd_request->bounce_sgl, cmd_request->bounce_sgl_count); |
| 407 | } |
| 408 | |
| 409 | scmnd->result = request->Status; |
| 410 | |
| 411 | if (scmnd->result) |
| 412 | { |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 413 | if (scsi_normalize_sense(scmnd->sense_buffer, request->SenseBufferSize, &sense_hdr)) |
| 414 | { |
| 415 | scsi_print_sense_hdr("storvsc", &sense_hdr); |
| 416 | } |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 417 | } |
| 418 | |
| 419 | ASSERT(request->BytesXfer <= request->DataBuffer.Length); |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 420 | scsi_set_resid(scmnd, request->DataBuffer.Length - request->BytesXfer); |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 421 | |
| 422 | scsi_done_fn = scmnd->scsi_done; |
| 423 | |
| 424 | scmnd->host_scribble = NULL; |
| 425 | scmnd->scsi_done = NULL; |
| 426 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 427 | /* !!DO NOT MODIFY the scmnd after this call */ |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 428 | scsi_done_fn(scmnd); |
| 429 | |
| 430 | kmem_cache_free(host_device_ctx->request_pool, cmd_request); |
| 431 | |
| 432 | DPRINT_EXIT(STORVSC_DRV); |
| 433 | } |
| 434 | |
| 435 | static int do_bounce_buffer(struct scatterlist *sgl, unsigned int sg_count) |
| 436 | { |
| 437 | int i=0; |
| 438 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 439 | /* No need to check */ |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 440 | if (sg_count < 2) |
| 441 | return -1; |
| 442 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 443 | /* We have at least 2 sg entries */ |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 444 | for ( i=0; i<sg_count; i++ ) |
| 445 | { |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 446 | if (i == 0) /* make sure 1st one does not have hole */ |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 447 | { |
| 448 | if (sgl[i].offset + sgl[i].length != PAGE_SIZE) |
| 449 | return i; |
| 450 | } |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 451 | else if (i == sg_count - 1) /* make sure last one does not have hole */ |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 452 | { |
| 453 | if (sgl[i].offset != 0) |
| 454 | return i; |
| 455 | } |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 456 | else /* make sure no hole in the middle */ |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 457 | { |
| 458 | if (sgl[i].length != PAGE_SIZE || sgl[i].offset != 0) |
| 459 | { |
| 460 | return i; |
| 461 | } |
| 462 | } |
| 463 | } |
| 464 | return -1; |
| 465 | } |
| 466 | |
| 467 | static struct scatterlist *create_bounce_buffer(struct scatterlist *sgl, unsigned int sg_count, unsigned int len) |
| 468 | { |
| 469 | int i; |
| 470 | int num_pages=0; |
| 471 | struct scatterlist* bounce_sgl; |
| 472 | struct page *page_buf; |
| 473 | |
| 474 | num_pages = ALIGN_UP(len, PAGE_SIZE) >> PAGE_SHIFT; |
| 475 | |
Nicolas Palix | 06da0bc | 2009-07-22 15:39:13 +0200 | [diff] [blame] | 476 | bounce_sgl = kcalloc(num_pages, sizeof(struct scatterlist), GFP_ATOMIC); |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 477 | if (!bounce_sgl) |
| 478 | { |
| 479 | return NULL; |
| 480 | } |
| 481 | |
| 482 | for(i=0; i<num_pages; i++) |
| 483 | { |
| 484 | page_buf = alloc_page(GFP_ATOMIC); |
| 485 | if (!page_buf) |
| 486 | { |
| 487 | goto cleanup; |
| 488 | } |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 489 | sg_set_page(&bounce_sgl[i], page_buf, 0, 0); |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 490 | } |
| 491 | |
| 492 | return bounce_sgl; |
| 493 | |
| 494 | cleanup: |
| 495 | destroy_bounce_buffer(bounce_sgl, num_pages); |
| 496 | return NULL; |
| 497 | } |
| 498 | |
| 499 | static void destroy_bounce_buffer(struct scatterlist *sgl, unsigned int sg_count) |
| 500 | { |
| 501 | int i; |
| 502 | struct page *page_buf; |
| 503 | |
| 504 | for (i=0; i<sg_count; i++) |
| 505 | { |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 506 | if ((page_buf = sg_page((&sgl[i]))) != NULL) |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 507 | |
| 508 | { |
| 509 | __free_page(page_buf); |
| 510 | } |
| 511 | } |
| 512 | |
| 513 | kfree(sgl); |
| 514 | } |
| 515 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 516 | /* Assume the bounce_sgl has enough room ie using the create_bounce_buffer() */ |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 517 | static unsigned int copy_to_bounce_buffer(struct scatterlist *orig_sgl, struct scatterlist *bounce_sgl, unsigned int orig_sgl_count) |
| 518 | { |
| 519 | int i=0,j=0; |
| 520 | unsigned long src, dest; |
| 521 | unsigned int srclen, destlen, copylen; |
| 522 | unsigned int total_copied=0; |
| 523 | unsigned long bounce_addr=0; |
| 524 | unsigned long src_addr=0; |
| 525 | unsigned long flags; |
| 526 | |
| 527 | local_irq_save(flags); |
| 528 | |
| 529 | for (i=0; i<orig_sgl_count; i++) |
| 530 | { |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 531 | src_addr = (unsigned long)kmap_atomic(sg_page((&orig_sgl[i])), KM_IRQ0) + orig_sgl[i].offset; |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 532 | src = src_addr; |
| 533 | srclen = orig_sgl[i].length; |
| 534 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 535 | /* if (PageHighMem(orig_sgl[i].page)) */ |
| 536 | /* printk("HighMem page detected - addr %p", (void*)src); */ |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 537 | |
| 538 | ASSERT(orig_sgl[i].offset + orig_sgl[i].length <= PAGE_SIZE); |
| 539 | |
| 540 | if (j == 0) |
| 541 | { |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 542 | bounce_addr = (unsigned long)kmap_atomic(sg_page((&bounce_sgl[j])), KM_IRQ0); |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 543 | } |
| 544 | |
| 545 | while (srclen) |
| 546 | { |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 547 | /* assume bounce offset always == 0 */ |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 548 | dest = bounce_addr + bounce_sgl[j].length; |
| 549 | destlen = PAGE_SIZE - bounce_sgl[j].length; |
| 550 | |
Greg Kroah-Hartman | fc6a4b2 | 2009-07-15 11:05:14 -0700 | [diff] [blame] | 551 | copylen = min(srclen, destlen); |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 552 | memcpy((void*)dest, (void*)src, copylen); |
| 553 | |
| 554 | total_copied += copylen; |
| 555 | bounce_sgl[j].length += copylen; |
| 556 | srclen -= copylen; |
| 557 | src += copylen; |
| 558 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 559 | if (bounce_sgl[j].length == PAGE_SIZE) /* full..move to next entry */ |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 560 | { |
| 561 | kunmap_atomic((void*)bounce_addr, KM_IRQ0); |
| 562 | j++; |
| 563 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 564 | /* if we need to use another bounce buffer */ |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 565 | if (srclen || i != orig_sgl_count -1) |
| 566 | { |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 567 | bounce_addr = (unsigned long)kmap_atomic(sg_page((&bounce_sgl[j])), KM_IRQ0); |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 568 | } |
| 569 | } |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 570 | else if (srclen == 0 && i == orig_sgl_count -1) /* unmap the last bounce that is < PAGE_SIZE */ |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 571 | { |
| 572 | kunmap_atomic((void*)bounce_addr, KM_IRQ0); |
| 573 | } |
| 574 | } |
| 575 | |
| 576 | kunmap_atomic((void*)(src_addr - orig_sgl[i].offset), KM_IRQ0); |
| 577 | } |
| 578 | |
| 579 | local_irq_restore(flags); |
| 580 | |
| 581 | return total_copied; |
| 582 | } |
| 583 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 584 | /* Assume the original sgl has enough room */ |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 585 | static unsigned int copy_from_bounce_buffer(struct scatterlist *orig_sgl, struct scatterlist *bounce_sgl, unsigned int orig_sgl_count) |
| 586 | { |
| 587 | int i=0,j=0; |
| 588 | unsigned long src, dest; |
| 589 | unsigned int srclen, destlen, copylen; |
| 590 | unsigned int total_copied=0; |
| 591 | unsigned long bounce_addr=0; |
| 592 | unsigned long dest_addr=0; |
| 593 | unsigned long flags; |
| 594 | |
| 595 | local_irq_save(flags); |
| 596 | |
| 597 | for (i=0; i<orig_sgl_count; i++) |
| 598 | { |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 599 | dest_addr = (unsigned long)kmap_atomic(sg_page((&orig_sgl[i])), KM_IRQ0) + orig_sgl[i].offset; |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 600 | dest = dest_addr; |
| 601 | destlen = orig_sgl[i].length; |
| 602 | ASSERT(orig_sgl[i].offset + orig_sgl[i].length <= PAGE_SIZE); |
| 603 | |
| 604 | if (j == 0) |
| 605 | { |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 606 | bounce_addr = (unsigned long)kmap_atomic(sg_page((&bounce_sgl[j])), KM_IRQ0); |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 607 | } |
| 608 | |
| 609 | while (destlen) |
| 610 | { |
| 611 | src = bounce_addr + bounce_sgl[j].offset; |
| 612 | srclen = bounce_sgl[j].length - bounce_sgl[j].offset; |
| 613 | |
Greg Kroah-Hartman | fc6a4b2 | 2009-07-15 11:05:14 -0700 | [diff] [blame] | 614 | copylen = min(srclen, destlen); |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 615 | memcpy((void*)dest, (void*)src, copylen); |
| 616 | |
| 617 | total_copied += copylen; |
| 618 | bounce_sgl[j].offset += copylen; |
| 619 | destlen -= copylen; |
| 620 | dest += copylen; |
| 621 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 622 | if (bounce_sgl[j].offset == bounce_sgl[j].length) /* full */ |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 623 | { |
| 624 | kunmap_atomic((void*)bounce_addr, KM_IRQ0); |
| 625 | j++; |
| 626 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 627 | /* if we need to use another bounce buffer */ |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 628 | if (destlen || i != orig_sgl_count -1) |
| 629 | { |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 630 | bounce_addr = (unsigned long)kmap_atomic(sg_page((&bounce_sgl[j])), KM_IRQ0); |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 631 | } |
| 632 | } |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 633 | else if (destlen == 0 && i == orig_sgl_count -1) /* unmap the last bounce that is < PAGE_SIZE */ |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 634 | { |
| 635 | kunmap_atomic((void*)bounce_addr, KM_IRQ0); |
| 636 | } |
| 637 | } |
| 638 | |
| 639 | kunmap_atomic((void*)(dest_addr - orig_sgl[i].offset), KM_IRQ0); |
| 640 | } |
| 641 | |
| 642 | local_irq_restore(flags); |
| 643 | |
| 644 | return total_copied; |
| 645 | } |
| 646 | |
| 647 | |
| 648 | /*++ |
| 649 | |
| 650 | Name: storvsc_queuecommand() |
| 651 | |
| 652 | Desc: Initiate command processing |
| 653 | |
| 654 | --*/ |
| 655 | static int storvsc_queuecommand(struct scsi_cmnd *scmnd, void (*done)(struct scsi_cmnd *)) |
| 656 | { |
| 657 | int ret=0; |
| 658 | struct host_device_context *host_device_ctx = (struct host_device_context*)scmnd->device->host->hostdata; |
| 659 | struct device_context *device_ctx=host_device_ctx->device_ctx; |
| 660 | struct driver_context *driver_ctx = driver_to_driver_context(device_ctx->device.driver); |
| 661 | struct storvsc_driver_context *storvsc_drv_ctx = (struct storvsc_driver_context*)driver_ctx; |
| 662 | STORVSC_DRIVER_OBJECT* storvsc_drv_obj = &storvsc_drv_ctx->drv_obj; |
| 663 | |
| 664 | STORVSC_REQUEST *request; |
| 665 | struct storvsc_cmd_request *cmd_request; |
| 666 | unsigned int request_size=0; |
| 667 | int i; |
| 668 | struct scatterlist *sgl; |
| 669 | |
| 670 | DPRINT_ENTER(STORVSC_DRV); |
| 671 | |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 672 | DPRINT_DBG(STORVSC_DRV, "scmnd %p dir %d, use_sg %d buf %p len %d queue depth %d tagged %d", |
| 673 | scmnd, |
| 674 | scmnd->sc_data_direction, |
| 675 | scsi_sg_count(scmnd), |
| 676 | scsi_sglist(scmnd), |
| 677 | scsi_bufflen(scmnd), |
| 678 | scmnd->device->queue_depth, |
| 679 | scmnd->device->tagged_supported); |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 680 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 681 | /* If retrying, no need to prep the cmd */ |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 682 | if (scmnd->host_scribble) |
| 683 | { |
| 684 | ASSERT(scmnd->scsi_done != NULL); |
| 685 | |
| 686 | cmd_request = (struct storvsc_cmd_request* )scmnd->host_scribble; |
| 687 | DPRINT_INFO(STORVSC_DRV, "retrying scmnd %p cmd_request %p", scmnd, cmd_request); |
| 688 | |
| 689 | goto retry_request; |
| 690 | } |
| 691 | |
| 692 | ASSERT(scmnd->scsi_done == NULL); |
| 693 | ASSERT(scmnd->host_scribble == NULL); |
| 694 | |
| 695 | scmnd->scsi_done = done; |
| 696 | |
| 697 | request_size = sizeof(struct storvsc_cmd_request); |
| 698 | |
| 699 | cmd_request = kmem_cache_alloc(host_device_ctx->request_pool, GFP_ATOMIC); |
| 700 | if (!cmd_request) |
| 701 | { |
| 702 | DPRINT_ERR(STORVSC_DRV, "scmnd (%p) - unable to allocate storvsc_cmd_request...marking queue busy", scmnd); |
| 703 | |
| 704 | scmnd->scsi_done = NULL; |
| 705 | return SCSI_MLQUEUE_DEVICE_BUSY; |
| 706 | } |
| 707 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 708 | /* Setup the cmd request */ |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 709 | cmd_request->bounce_sgl_count = 0; |
| 710 | cmd_request->bounce_sgl = NULL; |
| 711 | cmd_request->cmd = scmnd; |
| 712 | |
| 713 | scmnd->host_scribble = (unsigned char*)cmd_request; |
| 714 | |
| 715 | request = &cmd_request->request; |
| 716 | |
| 717 | request->Extension = (void*)((unsigned long)cmd_request + request_size); |
| 718 | DPRINT_DBG(STORVSC_DRV, "req %p size %d ext %d", request, request_size, storvsc_drv_obj->RequestExtSize); |
| 719 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 720 | /* Build the SRB */ |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 721 | switch(scmnd->sc_data_direction) |
| 722 | { |
| 723 | case DMA_TO_DEVICE: |
| 724 | request->Type = WRITE_TYPE; |
| 725 | break; |
| 726 | case DMA_FROM_DEVICE: |
| 727 | request->Type = READ_TYPE; |
| 728 | break; |
| 729 | default: |
| 730 | request->Type = UNKNOWN_TYPE; |
| 731 | break; |
| 732 | } |
| 733 | |
| 734 | request->OnIOCompletion = storvsc_commmand_completion; |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 735 | request->Context = cmd_request;/* scmnd; */ |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 736 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 737 | /* request->PortId = scmnd->device->channel; */ |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 738 | request->Host = host_device_ctx->port; |
| 739 | request->Bus = scmnd->device->channel; |
| 740 | request->TargetId = scmnd->device->id; |
| 741 | request->LunId = scmnd->device->lun; |
| 742 | |
| 743 | ASSERT(scmnd->cmd_len <= 16); |
| 744 | request->CdbLen = scmnd->cmd_len; |
| 745 | request->Cdb = scmnd->cmnd; |
| 746 | |
| 747 | request->SenseBuffer = scmnd->sense_buffer; |
| 748 | request->SenseBufferSize = SCSI_SENSE_BUFFERSIZE; |
| 749 | |
| 750 | |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 751 | request->DataBuffer.Length = scsi_bufflen(scmnd); |
| 752 | if (scsi_sg_count(scmnd)) |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 753 | { |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 754 | sgl = (struct scatterlist*)scsi_sglist(scmnd); |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 755 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 756 | /* check if we need to bounce the sgl */ |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 757 | if (do_bounce_buffer(sgl, scsi_sg_count(scmnd)) != -1) |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 758 | { |
| 759 | DPRINT_INFO(STORVSC_DRV, "need to bounce buffer for this scmnd %p", scmnd); |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 760 | cmd_request->bounce_sgl = create_bounce_buffer(sgl, scsi_sg_count(scmnd), scsi_bufflen(scmnd)); |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 761 | if (!cmd_request->bounce_sgl) |
| 762 | { |
| 763 | DPRINT_ERR(STORVSC_DRV, "unable to create bounce buffer for this scmnd %p", scmnd); |
| 764 | |
| 765 | scmnd->scsi_done = NULL; |
| 766 | scmnd->host_scribble = NULL; |
| 767 | kmem_cache_free(host_device_ctx->request_pool, cmd_request); |
| 768 | |
| 769 | return SCSI_MLQUEUE_HOST_BUSY; |
| 770 | } |
| 771 | |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 772 | cmd_request->bounce_sgl_count = ALIGN_UP(scsi_bufflen(scmnd), PAGE_SIZE) >> PAGE_SHIFT; |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 773 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 774 | /* printk("bouncing buffer allocated %p original buffer %p\n", bounce_sgl, sgl); */ |
| 775 | /* printk("copy_to_bounce_buffer\n"); */ |
| 776 | /* FIXME: We can optimize on reads by just skipping this */ |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 777 | copy_to_bounce_buffer(sgl, cmd_request->bounce_sgl, scsi_sg_count(scmnd)); |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 778 | |
| 779 | sgl = cmd_request->bounce_sgl; |
| 780 | } |
| 781 | |
| 782 | request->DataBuffer.Offset = sgl[0].offset; |
| 783 | |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 784 | for (i = 0; i < scsi_sg_count(scmnd); i++ ) |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 785 | { |
| 786 | DPRINT_DBG(STORVSC_DRV, "sgl[%d] len %d offset %d \n", i, sgl[i].length, sgl[i].offset); |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 787 | request->DataBuffer.PfnArray[i] = page_to_pfn(sg_page((&sgl[i]))); |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 788 | } |
| 789 | } |
| 790 | |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 791 | else if (scsi_sglist(scmnd)) |
| 792 | { |
| 793 | ASSERT(scsi_bufflen(scmnd) <= PAGE_SIZE); |
| 794 | request->DataBuffer.Offset = virt_to_phys(scsi_sglist(scmnd)) & (PAGE_SIZE-1); |
| 795 | request->DataBuffer.PfnArray[0] = virt_to_phys(scsi_sglist(scmnd)) >> PAGE_SHIFT; |
| 796 | } |
| 797 | else |
| 798 | { |
| 799 | ASSERT(scsi_bufflen(scmnd) == 0); |
| 800 | } |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 801 | |
| 802 | retry_request: |
| 803 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 804 | /* Invokes the vsc to start an IO */ |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 805 | ret = storvsc_drv_obj->OnIORequest(&device_ctx->device_obj, &cmd_request->request); |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 806 | if (ret == -1) /* no more space */ |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 807 | { |
| 808 | DPRINT_ERR(STORVSC_DRV, "scmnd (%p) - queue FULL...marking queue busy", scmnd); |
| 809 | |
| 810 | if (cmd_request->bounce_sgl_count) |
| 811 | { |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 812 | /* FIXME: We can optimize on writes by just skipping this */ |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 813 | copy_from_bounce_buffer(scsi_sglist(scmnd), cmd_request->bounce_sgl, scsi_sg_count(scmnd)); |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 814 | destroy_bounce_buffer(cmd_request->bounce_sgl, cmd_request->bounce_sgl_count); |
| 815 | } |
| 816 | |
| 817 | kmem_cache_free(host_device_ctx->request_pool, cmd_request); |
| 818 | |
| 819 | scmnd->scsi_done = NULL; |
| 820 | scmnd->host_scribble = NULL; |
| 821 | |
| 822 | ret = SCSI_MLQUEUE_DEVICE_BUSY; |
| 823 | } |
| 824 | |
| 825 | DPRINT_EXIT(STORVSC_DRV); |
| 826 | |
| 827 | return ret; |
| 828 | } |
| 829 | |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 830 | static int storvsc_merge_bvec(struct request_queue *q, struct bvec_merge_data *bmd, struct bio_vec *bvec) |
| 831 | { |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 832 | return bvec->bv_len; /* checking done by caller. */ |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 833 | } |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 834 | |
| 835 | /*++ |
| 836 | |
| 837 | Name: storvsc_device_configure() |
| 838 | |
| 839 | Desc: Configure the specified scsi device |
| 840 | |
| 841 | --*/ |
| 842 | static int storvsc_device_alloc(struct scsi_device *sdevice) |
| 843 | { |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 844 | DPRINT_DBG(STORVSC_DRV, "sdev (%p) - setting device flag to %d", sdevice, BLIST_SPARSELUN); |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 845 | /* This enables luns to be located sparsely. Otherwise, we may not discovered them. */ |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 846 | sdevice->sdev_bflags |= BLIST_SPARSELUN | BLIST_LARGELUN; |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 847 | return 0; |
| 848 | } |
| 849 | |
| 850 | static int storvsc_device_configure(struct scsi_device *sdevice) |
| 851 | { |
| 852 | DPRINT_INFO(STORVSC_DRV, "sdev (%p) - curr queue depth %d", sdevice, sdevice->queue_depth); |
| 853 | |
| 854 | DPRINT_INFO(STORVSC_DRV, "sdev (%p) - setting queue depth to %d", sdevice, STORVSC_MAX_IO_REQUESTS); |
| 855 | scsi_adjust_queue_depth(sdevice, MSG_SIMPLE_TAG, STORVSC_MAX_IO_REQUESTS); |
| 856 | |
Greg Kroah-Hartman | 2701f68 | 2009-07-16 12:36:37 -0700 | [diff] [blame] | 857 | DPRINT_INFO(STORVSC_DRV, "sdev (%p) - setting max segment size to %ld", sdevice, PAGE_SIZE); |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 858 | blk_queue_max_segment_size(sdevice->request_queue, PAGE_SIZE); |
| 859 | |
| 860 | DPRINT_INFO(STORVSC_DRV, "sdev (%p) - adding merge bio vec routine", sdevice); |
| 861 | blk_queue_merge_bvec(sdevice->request_queue, storvsc_merge_bvec); |
| 862 | |
| 863 | blk_queue_bounce_limit(sdevice->request_queue, BLK_BOUNCE_ANY); |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 864 | /* sdevice->timeout = (2000 * HZ);//(75 * HZ); */ |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 865 | |
| 866 | return 0; |
| 867 | } |
| 868 | |
| 869 | /*++ |
| 870 | |
| 871 | Name: storvsc_host_reset_handler() |
| 872 | |
| 873 | Desc: Reset the scsi HBA |
| 874 | |
| 875 | --*/ |
| 876 | static int storvsc_host_reset_handler(struct scsi_cmnd *scmnd) |
| 877 | { |
| 878 | int ret=SUCCESS; |
| 879 | struct host_device_context *host_device_ctx = (struct host_device_context*)scmnd->device->host->hostdata; |
| 880 | struct device_context *device_ctx = host_device_ctx->device_ctx; |
| 881 | struct driver_context *driver_ctx = driver_to_driver_context(device_ctx->device.driver); |
| 882 | struct storvsc_driver_context *storvsc_drv_ctx = (struct storvsc_driver_context*)driver_ctx; |
| 883 | |
| 884 | STORVSC_DRIVER_OBJECT *storvsc_drv_obj = &storvsc_drv_ctx->drv_obj; |
| 885 | |
| 886 | DPRINT_ENTER(STORVSC_DRV); |
| 887 | |
| 888 | DPRINT_INFO(STORVSC_DRV, "sdev (%p) dev obj (%p) - host resetting...", scmnd->device, &device_ctx->device_obj); |
| 889 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 890 | /* Invokes the vsc to reset the host/bus */ |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 891 | ASSERT(storvsc_drv_obj->OnHostReset); |
| 892 | ret = storvsc_drv_obj->OnHostReset(&device_ctx->device_obj); |
| 893 | if (ret != 0) |
| 894 | { |
| 895 | DPRINT_EXIT(STORVSC_DRV); |
| 896 | return ret; |
| 897 | } |
| 898 | |
| 899 | DPRINT_INFO(STORVSC_DRV, "sdev (%p) dev obj (%p) - host reseted", scmnd->device, &device_ctx->device_obj); |
| 900 | |
| 901 | DPRINT_EXIT(STORVSC_DRV); |
| 902 | |
| 903 | return ret; |
| 904 | } |
| 905 | |
| 906 | /*++ |
| 907 | |
| 908 | Name: storvsc_host_rescan |
| 909 | |
| 910 | Desc: Rescan the scsi HBA |
| 911 | |
| 912 | --*/ |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 913 | static void storvsc_host_rescan_callback(struct work_struct *work) |
| 914 | { |
| 915 | DEVICE_OBJECT* device_obj = |
| 916 | &((struct host_device_context*)work)->device_ctx->device_obj; |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 917 | struct device_context* device_ctx = to_device_context(device_obj); |
Greg Kroah-Hartman | 0883c52 | 2009-07-24 10:58:22 -0700 | [diff] [blame] | 918 | struct Scsi_Host *host = dev_get_drvdata(&device_ctx->device); |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 919 | struct scsi_device *sdev; |
| 920 | struct host_device_context *host_device_ctx; |
| 921 | struct scsi_device **sdevs_remove_list; |
| 922 | unsigned int sdevs_count=0; |
| 923 | unsigned int found; |
| 924 | unsigned int i; |
| 925 | unsigned int lun_count=0; |
| 926 | unsigned int *lun_list; |
| 927 | |
| 928 | DPRINT_ENTER(STORVSC_DRV); |
| 929 | |
| 930 | host_device_ctx = (struct host_device_context*)host->hostdata; |
Nicolas Palix | 06da0bc | 2009-07-22 15:39:13 +0200 | [diff] [blame] | 931 | lun_list = kcalloc(STORVSC_MAX_LUNS_PER_TARGET, sizeof(unsigned int), GFP_ATOMIC); |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 932 | if (!lun_list) |
| 933 | { |
| 934 | DPRINT_ERR(STORVSC_DRV, "unable to allocate lun list"); |
| 935 | return; |
| 936 | } |
| 937 | |
Nicolas Palix | 06da0bc | 2009-07-22 15:39:13 +0200 | [diff] [blame] | 938 | sdevs_remove_list = kcalloc(STORVSC_MAX_LUNS_PER_TARGET, sizeof(void *), GFP_ATOMIC); |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 939 | if (!sdevs_remove_list) |
| 940 | { |
| 941 | kfree(lun_list); |
| 942 | DPRINT_ERR(STORVSC_DRV, "unable to allocate lun remove list"); |
| 943 | return; |
| 944 | } |
| 945 | |
Bill Pemberton | 7f6f27d | 2009-07-27 16:47:33 -0400 | [diff] [blame^] | 946 | DPRINT_INFO(STORVSC_DRV, "rescanning host for new scsi devices..."); |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 947 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 948 | /* Rescan for new device */ |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 949 | scsi_scan_target(&host->shost_gendev, host_device_ctx->path, host_device_ctx->target, SCAN_WILD_CARD, 1); |
| 950 | |
| 951 | DPRINT_INFO(STORVSC_DRV, "rescanning host for removed scsi device..."); |
| 952 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 953 | /* Use the 1st device to send the report luns cmd */ |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 954 | shost_for_each_device(sdev, host) |
| 955 | { |
| 956 | lun_count=STORVSC_MAX_LUNS_PER_TARGET; |
| 957 | storvsc_report_luns(sdev, lun_list, &lun_count); |
| 958 | |
| 959 | DPRINT_INFO(STORVSC_DRV, "report luns on scsi device (%p) found %u luns ", sdev, lun_count); |
| 960 | DPRINT_INFO(STORVSC_DRV, "existing luns on scsi device (%p) host (%d)", sdev, host->host_no); |
| 961 | |
| 962 | scsi_device_put(sdev); |
| 963 | break; |
| 964 | } |
| 965 | |
| 966 | for (i=0; i<lun_count; i++) |
| 967 | { |
| 968 | DPRINT_INFO(STORVSC_DRV, "%d) lun %u", i, lun_list[i]); |
| 969 | } |
| 970 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 971 | /* Rescan for devices that may have been removed. */ |
| 972 | /* We do not have to worry that new devices may have been added since */ |
| 973 | /* this callback is serialized by the workqueue ie add/remove are done here. */ |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 974 | shost_for_each_device(sdev, host) |
| 975 | { |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 976 | /* See if this device is still here */ |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 977 | found = 0; |
| 978 | for (i=0; i<lun_count; i++) |
| 979 | { |
| 980 | if (sdev->lun == lun_list[i]) |
| 981 | { |
| 982 | found = 1; |
| 983 | break; |
| 984 | } |
| 985 | } |
| 986 | if (!found) |
| 987 | { |
| 988 | DPRINT_INFO(STORVSC_DRV, "lun (%u) does not exists", sdev->lun); |
| 989 | sdevs_remove_list[sdevs_count++] = sdev; |
| 990 | } |
| 991 | } |
| 992 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 993 | /* Now remove the devices */ |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 994 | for (i=0; i< sdevs_count; i++) |
| 995 | { |
| 996 | DPRINT_INFO(STORVSC_DRV, "removing scsi device (%p) lun (%u)...", |
| 997 | sdevs_remove_list[i], sdevs_remove_list[i]->lun); |
| 998 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 999 | /* make sure it is not removed from underneath us */ |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 1000 | if (!scsi_device_get(sdevs_remove_list[i])) |
| 1001 | { |
| 1002 | scsi_remove_device(sdevs_remove_list[i]); |
| 1003 | scsi_device_put(sdevs_remove_list[i]); |
| 1004 | } |
| 1005 | } |
| 1006 | |
| 1007 | DPRINT_INFO(STORVSC_DRV, "rescan completed on dev obj (%p) target (%u) bus (%u)", device_obj, host_device_ctx->target, host_device_ctx->path); |
| 1008 | |
| 1009 | kfree(lun_list); |
| 1010 | kfree(sdevs_remove_list); |
| 1011 | |
| 1012 | DPRINT_EXIT(STORVSC_DRV); |
| 1013 | } |
| 1014 | |
| 1015 | static int storvsc_report_luns(struct scsi_device *sdev, unsigned int luns[], unsigned int *lun_count) |
| 1016 | { |
| 1017 | int i,j; |
| 1018 | unsigned int lun=0; |
| 1019 | unsigned int num_luns; |
| 1020 | int result; |
| 1021 | unsigned char *data; |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 1022 | struct scsi_sense_hdr sshdr; |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 1023 | unsigned char cmd[16]={0}; |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 1024 | unsigned int report_len = 8*(STORVSC_MAX_LUNS_PER_TARGET+1); /* Add 1 to cover the report_lun header */ |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 1025 | unsigned long long *report_luns; |
| 1026 | const unsigned int in_lun_count = *lun_count; |
| 1027 | |
| 1028 | *lun_count = 0; |
| 1029 | |
| 1030 | report_luns = kzalloc(report_len, GFP_ATOMIC); |
| 1031 | if (!report_luns) |
| 1032 | { |
| 1033 | return -ENOMEM; |
| 1034 | } |
| 1035 | |
| 1036 | cmd[0] = REPORT_LUNS; |
| 1037 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 1038 | /* cmd length */ |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 1039 | *(unsigned int*)&cmd[6] = cpu_to_be32(report_len); |
| 1040 | |
Greg Kroah-Hartman | 97f4ee3 | 2009-07-14 10:18:50 -0700 | [diff] [blame] | 1041 | result = scsi_execute_req(sdev, cmd, DMA_FROM_DEVICE, (unsigned char*)report_luns, report_len, &sshdr, 30*HZ, 3, NULL); |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 1042 | if (result != 0) |
| 1043 | { |
| 1044 | kfree(report_luns); |
| 1045 | return -EBUSY; |
| 1046 | } |
| 1047 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 1048 | /* get the length from the first four bytes */ |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 1049 | report_len = be32_to_cpu(*(unsigned int*)&report_luns[0]); |
| 1050 | |
| 1051 | num_luns = (report_len / sizeof(unsigned long long)); |
| 1052 | if (num_luns > in_lun_count) |
| 1053 | { |
| 1054 | kfree(report_luns); |
| 1055 | return -EINVAL; |
| 1056 | } |
| 1057 | |
| 1058 | *lun_count = num_luns; |
| 1059 | |
| 1060 | DPRINT_DBG(STORVSC_DRV, "report luns on scsi device (%p) found %u luns ", sdev, num_luns); |
| 1061 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 1062 | /* lun id starts at 1 */ |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 1063 | for (i=1; i< num_luns+1; i++) |
| 1064 | { |
| 1065 | lun = 0; |
| 1066 | data = (unsigned char*)&report_luns[i]; |
| 1067 | for (j = 0; j < sizeof(lun); j += 2) |
| 1068 | { |
| 1069 | lun = lun | (((data[j] << 8) | data[j + 1]) << (j * 8)); |
| 1070 | } |
| 1071 | |
| 1072 | luns[i-1] = lun; |
| 1073 | } |
| 1074 | |
| 1075 | kfree(report_luns); |
| 1076 | return 0; |
| 1077 | } |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 1078 | |
| 1079 | static void storvsc_host_rescan(DEVICE_OBJECT* device_obj) |
| 1080 | { |
| 1081 | struct device_context* device_ctx = to_device_context(device_obj); |
Greg Kroah-Hartman | 0883c52 | 2009-07-24 10:58:22 -0700 | [diff] [blame] | 1082 | struct Scsi_Host *host = dev_get_drvdata(&device_ctx->device); |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 1083 | struct host_device_context *host_device_ctx; |
| 1084 | |
| 1085 | DPRINT_ENTER(STORVSC_DRV); |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 1086 | |
| 1087 | host_device_ctx = (struct host_device_context*)host->hostdata; |
| 1088 | |
| 1089 | DPRINT_INFO(STORVSC_DRV, "initiating rescan on dev obj (%p) target (%u) bus (%u)...", device_obj, host_device_ctx->target, host_device_ctx->path); |
| 1090 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 1091 | /* We need to queue this since the scanning may block and the caller may be in an intr context */ |
| 1092 | /* scsi_queue_work(host, &host_device_ctx->host_rescan_work); */ |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 1093 | schedule_work(&host_device_ctx->host_rescan_work); |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 1094 | DPRINT_EXIT(STORVSC_DRV); |
| 1095 | } |
| 1096 | |
| 1097 | static int storvsc_get_chs(struct scsi_device *sdev, struct block_device * bdev, sector_t capacity, int *info) |
| 1098 | { |
| 1099 | sector_t total_sectors = capacity; |
| 1100 | sector_t cylinder_times_heads=0; |
| 1101 | sector_t temp=0; |
| 1102 | |
| 1103 | int sectors_per_track=0; |
| 1104 | int heads=0; |
| 1105 | int cylinders=0; |
| 1106 | int rem=0; |
| 1107 | |
| 1108 | if (total_sectors > (65535 * 16 * 255)) { |
| 1109 | total_sectors = (65535 * 16 * 255); |
| 1110 | } |
| 1111 | |
| 1112 | if (total_sectors >= (65535 * 16 * 63)) { |
| 1113 | sectors_per_track = 255; |
| 1114 | heads = 16; |
| 1115 | |
| 1116 | cylinder_times_heads = total_sectors; |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 1117 | rem = sector_div(cylinder_times_heads, sectors_per_track); /* sector_div stores the quotient in cylinder_times_heads */ |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 1118 | } |
| 1119 | else |
| 1120 | { |
| 1121 | sectors_per_track = 17; |
| 1122 | |
| 1123 | cylinder_times_heads = total_sectors; |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 1124 | rem = sector_div(cylinder_times_heads, sectors_per_track); /* sector_div stores the quotient in cylinder_times_heads */ |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 1125 | |
| 1126 | temp = cylinder_times_heads + 1023; |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 1127 | rem = sector_div(temp, 1024); /* sector_div stores the quotient in temp */ |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 1128 | |
| 1129 | heads = temp; |
| 1130 | |
| 1131 | if (heads < 4) { |
| 1132 | heads = 4; |
| 1133 | } |
| 1134 | |
| 1135 | if (cylinder_times_heads >= (heads * 1024) || (heads > 16)) { |
| 1136 | sectors_per_track = 31; |
| 1137 | heads = 16; |
| 1138 | |
| 1139 | cylinder_times_heads = total_sectors; |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 1140 | rem = sector_div(cylinder_times_heads, sectors_per_track); /* sector_div stores the quotient in cylinder_times_heads */ |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 1141 | } |
| 1142 | |
| 1143 | if (cylinder_times_heads >= (heads * 1024)) { |
| 1144 | sectors_per_track = 63; |
| 1145 | heads = 16; |
| 1146 | |
| 1147 | cylinder_times_heads = total_sectors; |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 1148 | rem = sector_div(cylinder_times_heads, sectors_per_track); /* sector_div stores the quotient in cylinder_times_heads */ |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 1149 | } |
| 1150 | } |
| 1151 | |
| 1152 | temp = cylinder_times_heads; |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 1153 | rem = sector_div(temp, heads); /* sector_div stores the quotient in temp */ |
Hank Janssen | bef4a34 | 2009-07-13 16:01:31 -0700 | [diff] [blame] | 1154 | cylinders = temp; |
| 1155 | |
| 1156 | info[0] = heads; |
| 1157 | info[1] = sectors_per_track; |
| 1158 | info[2] = cylinders; |
| 1159 | |
| 1160 | DPRINT_INFO(STORVSC_DRV, "CHS (%d, %d, %d)", cylinders, heads, sectors_per_track); |
| 1161 | |
| 1162 | return 0; |
| 1163 | } |
| 1164 | |
| 1165 | MODULE_LICENSE("GPL"); |
| 1166 | |
| 1167 | static int __init storvsc_init(void) |
| 1168 | { |
| 1169 | int ret; |
| 1170 | |
| 1171 | DPRINT_ENTER(STORVSC_DRV); |
| 1172 | |
| 1173 | DPRINT_INFO(STORVSC_DRV, "Storvsc initializing...."); |
| 1174 | |
| 1175 | ret = storvsc_drv_init(StorVscInitialize); |
| 1176 | |
| 1177 | DPRINT_EXIT(STORVSC_DRV); |
| 1178 | |
| 1179 | return ret; |
| 1180 | } |
| 1181 | |
| 1182 | static void __exit storvsc_exit(void) |
| 1183 | { |
| 1184 | DPRINT_ENTER(STORVSC_DRV); |
| 1185 | |
| 1186 | storvsc_drv_exit(); |
| 1187 | |
| 1188 | DPRINT_ENTER(STORVSC_DRV); |
| 1189 | } |
| 1190 | |
| 1191 | module_param(storvsc_ringbuffer_size, int, S_IRUGO); |
| 1192 | |
| 1193 | module_init(storvsc_init); |
| 1194 | module_exit(storvsc_exit); |
| 1195 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 1196 | /* eof */ |