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author | David S. Miller <davem@davemloft.net> | 2010-03-15 23:23:54 (GMT) |
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committer | David S. Miller <davem@davemloft.net> | 2010-03-15 23:23:54 (GMT) |
commit | 4961e02f1999e1c3468c09b2669c94d7c3ae82a8 (patch) | |
tree | 44c15abb09d7ba5e17a9aba95ee246648b1c1a8a /drivers/staging/hv/storvsc_drv.c | |
parent | d14a0ebda7d3daede1a99c01527affb9ceaa4c22 (diff) | |
parent | a3d3203e4bb40f253b1541e310dc0f9305be7c84 (diff) | |
download | linux-fsl-qoriq-4961e02f1999e1c3468c09b2669c94d7c3ae82a8.tar.xz |
Merge branch 'master' of /home/davem/src/GIT/linux-2.6/
Diffstat (limited to 'drivers/staging/hv/storvsc_drv.c')
-rw-r--r-- | drivers/staging/hv/storvsc_drv.c | 227 |
1 files changed, 8 insertions, 219 deletions
diff --git a/drivers/staging/hv/storvsc_drv.c b/drivers/staging/hv/storvsc_drv.c index d49dc21..3988f4b 100644 --- a/drivers/staging/hv/storvsc_drv.c +++ b/drivers/staging/hv/storvsc_drv.c @@ -32,6 +32,7 @@ #include <scsi/scsi_dbg.h> #include "osd.h" #include "logging.h" +#include "VersionInfo.h" #include "vmbus.h" #include "StorVscApi.h" @@ -39,10 +40,8 @@ struct host_device_context { /* must be 1st field * FIXME this is a bug */ - struct work_struct host_rescan_work; - /* point back to our device context */ - struct device_context *device_ctx; + struct vm_device *device_ctx; struct kmem_cache *request_pool; unsigned int port; unsigned char path; @@ -77,8 +76,6 @@ static int storvsc_queuecommand(struct scsi_cmnd *scmnd, static int storvsc_device_alloc(struct scsi_device *); static int storvsc_device_configure(struct scsi_device *); static int storvsc_host_reset_handler(struct scsi_cmnd *scmnd); -static void storvsc_host_rescan_callback(struct work_struct *work); -static void storvsc_host_rescan(struct hv_device *device_obj); static int storvsc_remove(struct device *dev); static struct scatterlist *create_bounce_buffer(struct scatterlist *sgl, @@ -94,8 +91,6 @@ static unsigned int copy_to_bounce_buffer(struct scatterlist *orig_sgl, struct scatterlist *bounce_sgl, unsigned int orig_sgl_count); -static int storvsc_report_luns(struct scsi_device *sdev, unsigned int luns[], - unsigned int *lun_count); static int storvsc_get_chs(struct scsi_device *sdev, struct block_device *bdev, sector_t capacity, int *info); @@ -148,7 +143,6 @@ static int storvsc_drv_init(int (*drv_init)(struct hv_driver *drv)) vmbus_get_interface(&storvsc_drv_obj->Base.VmbusChannelInterface); storvsc_drv_obj->RingBufferSize = storvsc_ringbuffer_size; - storvsc_drv_obj->OnHostRescan = storvsc_host_rescan; /* Callback to client driver to complete the initialization */ drv_init(&storvsc_drv_obj->Base); @@ -240,7 +234,7 @@ static int storvsc_probe(struct device *device) (struct storvsc_driver_context *)driver_ctx; struct storvsc_driver_object *storvsc_drv_obj = &storvsc_drv_ctx->drv_obj; - struct device_context *device_ctx = device_to_device_context(device); + struct vm_device *device_ctx = device_to_vm_device(device); struct hv_device *device_obj = &device_ctx->device_obj; struct Scsi_Host *host; struct host_device_context *host_device_ctx; @@ -266,9 +260,6 @@ static int storvsc_probe(struct device *device) host_device_ctx->port = host->host_no; host_device_ctx->device_ctx = device_ctx; - INIT_WORK(&host_device_ctx->host_rescan_work, - storvsc_host_rescan_callback); - host_device_ctx->request_pool = kmem_cache_create(dev_name(&device_ctx->device), sizeof(struct storvsc_cmd_request) + @@ -339,7 +330,7 @@ static int storvsc_remove(struct device *device) (struct storvsc_driver_context *)driver_ctx; struct storvsc_driver_object *storvsc_drv_obj = &storvsc_drv_ctx->drv_obj; - struct device_context *device_ctx = device_to_device_context(device); + struct vm_device *device_ctx = device_to_vm_device(device); struct hv_device *device_obj = &device_ctx->device_obj; struct Scsi_Host *host = dev_get_drvdata(device); struct host_device_context *host_device_ctx = @@ -640,7 +631,7 @@ static int storvsc_queuecommand(struct scsi_cmnd *scmnd, int ret; struct host_device_context *host_device_ctx = (struct host_device_context *)scmnd->device->host->hostdata; - struct device_context *device_ctx = host_device_ctx->device_ctx; + struct vm_device *device_ctx = host_device_ctx->device_ctx; struct driver_context *driver_ctx = driver_to_driver_context(device_ctx->device.driver); struct storvsc_driver_context *storvsc_drv_ctx = @@ -879,14 +870,7 @@ static int storvsc_host_reset_handler(struct scsi_cmnd *scmnd) int ret; struct host_device_context *host_device_ctx = (struct host_device_context *)scmnd->device->host->hostdata; - struct device_context *device_ctx = host_device_ctx->device_ctx; - struct driver_context *driver_ctx = - driver_to_driver_context(device_ctx->device.driver); - struct storvsc_driver_context *storvsc_drv_ctx = - (struct storvsc_driver_context *)driver_ctx; - - struct storvsc_driver_object *storvsc_drv_obj = - &storvsc_drv_ctx->drv_obj; + struct vm_device *device_ctx = host_device_ctx->device_ctx; DPRINT_ENTER(STORVSC_DRV); @@ -894,8 +878,7 @@ static int storvsc_host_reset_handler(struct scsi_cmnd *scmnd) scmnd->device, &device_ctx->device_obj); /* Invokes the vsc to reset the host/bus */ - ASSERT(storvsc_drv_obj->OnHostReset); - ret = storvsc_drv_obj->OnHostReset(&device_ctx->device_obj); + ret = StorVscOnHostReset(&device_ctx->device_obj); if (ret != 0) { DPRINT_EXIT(STORVSC_DRV); return ret; @@ -909,201 +892,6 @@ static int storvsc_host_reset_handler(struct scsi_cmnd *scmnd) return ret; } -/** - * storvsc_host_rescan - Rescan the scsi HBA - */ -static void storvsc_host_rescan_callback(struct work_struct *work) -{ - struct hv_device *device_obj = - &((struct host_device_context *)work)->device_ctx->device_obj; - struct device_context *device_ctx = to_device_context(device_obj); - struct Scsi_Host *host = dev_get_drvdata(&device_ctx->device); - struct scsi_device *sdev; - struct host_device_context *host_device_ctx; - struct scsi_device **sdevs_remove_list; - unsigned int sdevs_count = 0; - unsigned int found; - unsigned int i; - unsigned int lun_count = 0; - unsigned int *lun_list; - - DPRINT_ENTER(STORVSC_DRV); - - host_device_ctx = (struct host_device_context *)host->hostdata; - lun_list = kcalloc(STORVSC_MAX_LUNS_PER_TARGET, sizeof(unsigned int), - GFP_ATOMIC); - if (!lun_list) { - DPRINT_ERR(STORVSC_DRV, "unable to allocate lun list"); - return; - } - - sdevs_remove_list = kcalloc(STORVSC_MAX_LUNS_PER_TARGET, - sizeof(void *), GFP_ATOMIC); - if (!sdevs_remove_list) { - kfree(lun_list); - DPRINT_ERR(STORVSC_DRV, "unable to allocate lun remove list"); - return; - } - - DPRINT_INFO(STORVSC_DRV, "rescanning host for new scsi devices..."); - - /* Rescan for new device */ - scsi_scan_target(&host->shost_gendev, host_device_ctx->path, - host_device_ctx->target, SCAN_WILD_CARD, 1); - - DPRINT_INFO(STORVSC_DRV, "rescanning host for removed scsi device..."); - - /* Use the 1st device to send the report luns cmd */ - shost_for_each_device(sdev, host) { - lun_count = STORVSC_MAX_LUNS_PER_TARGET; - storvsc_report_luns(sdev, lun_list, &lun_count); - - DPRINT_INFO(STORVSC_DRV, - "report luns on scsi device (%p) found %u luns ", - sdev, lun_count); - DPRINT_INFO(STORVSC_DRV, - "existing luns on scsi device (%p) host (%d)", - sdev, host->host_no); - - scsi_device_put(sdev); - break; - } - - for (i = 0; i < lun_count; i++) - DPRINT_INFO(STORVSC_DRV, "%d) lun %u", i, lun_list[i]); - - /* Rescan for devices that may have been removed. - * We do not have to worry that new devices may have been added since - * this callback is serialized by the workqueue ie add/remove are done - * here. - */ - shost_for_each_device(sdev, host) { - /* See if this device is still here */ - found = 0; - for (i = 0; i < lun_count; i++) { - if (sdev->lun == lun_list[i]) { - found = 1; - break; - } - } - if (!found) { - DPRINT_INFO(STORVSC_DRV, "lun (%u) does not exists", - sdev->lun); - sdevs_remove_list[sdevs_count++] = sdev; - } - } - - /* Now remove the devices */ - for (i = 0; i < sdevs_count; i++) { - DPRINT_INFO(STORVSC_DRV, - "removing scsi device (%p) lun (%u)...", - sdevs_remove_list[i], sdevs_remove_list[i]->lun); - - /* make sure it is not removed from underneath us */ - if (!scsi_device_get(sdevs_remove_list[i])) { - scsi_remove_device(sdevs_remove_list[i]); - scsi_device_put(sdevs_remove_list[i]); - } - } - - DPRINT_INFO(STORVSC_DRV, "rescan completed on dev obj (%p) " - "target (%u) bus (%u)", device_obj, - host_device_ctx->target, host_device_ctx->path); - - kfree(lun_list); - kfree(sdevs_remove_list); - - DPRINT_EXIT(STORVSC_DRV); -} - -static int storvsc_report_luns(struct scsi_device *sdev, unsigned int luns[], - unsigned int *lun_count) -{ - int i, j; - unsigned int lun = 0; - unsigned int num_luns; - int result; - unsigned char *data; - struct scsi_sense_hdr sshdr; - unsigned char cmd[16] = {0}; - /* Add 1 to cover the report_lun header */ - unsigned int report_len = 8 * (STORVSC_MAX_LUNS_PER_TARGET+1); - unsigned long long *report_luns; - const unsigned int in_lun_count = *lun_count; - - *lun_count = 0; - - report_luns = kzalloc(report_len, GFP_ATOMIC); - if (!report_luns) - return -ENOMEM; - - cmd[0] = REPORT_LUNS; - - /* cmd length */ - *(unsigned int *)&cmd[6] = cpu_to_be32(report_len); - - result = scsi_execute_req(sdev, cmd, DMA_FROM_DEVICE, - (unsigned char *)report_luns, report_len, - &sshdr, 30 * HZ, 3, NULL); - if (result != 0) { - kfree(report_luns); - return -EBUSY; - } - - /* get the length from the first four bytes */ - report_len = be32_to_cpu(*(unsigned int *)&report_luns[0]); - - num_luns = (report_len / sizeof(unsigned long long)); - if (num_luns > in_lun_count) { - kfree(report_luns); - return -EINVAL; - } - - *lun_count = num_luns; - - DPRINT_DBG(STORVSC_DRV, - "report luns on scsi device (%p) found %u luns ", - sdev, num_luns); - - /* lun id starts at 1 */ - for (i = 1; i < num_luns + 1; i++) { - lun = 0; - data = (unsigned char *)&report_luns[i]; - for (j = 0; j < sizeof(lun); j += 2) { - lun = lun | (((data[j] << 8) | data[j + 1]) << - (j * 8)); - } - - luns[i-1] = lun; - } - - kfree(report_luns); - return 0; -} - -static void storvsc_host_rescan(struct hv_device *device_obj) -{ - struct device_context *device_ctx = to_device_context(device_obj); - struct Scsi_Host *host = dev_get_drvdata(&device_ctx->device); - struct host_device_context *host_device_ctx; - - DPRINT_ENTER(STORVSC_DRV); - - host_device_ctx = (struct host_device_context *)host->hostdata; - - DPRINT_INFO(STORVSC_DRV, "initiating rescan on dev obj (%p) " - "target (%u) bus (%u)...", device_obj, - host_device_ctx->target, host_device_ctx->path); - - /* - * We need to queue this since the scanning may block and the caller - * may be in an intr context - */ - /* scsi_queue_work(host, &host_device_ctx->host_rescan_work); */ - schedule_work(&host_device_ctx->host_rescan_work); - DPRINT_EXIT(STORVSC_DRV); -} - static int storvsc_get_chs(struct scsi_device *sdev, struct block_device * bdev, sector_t capacity, int *info) { @@ -1203,6 +991,7 @@ static void __exit storvsc_exit(void) } MODULE_LICENSE("GPL"); +MODULE_VERSION(HV_DRV_VERSION); module_param(storvsc_ringbuffer_size, int, S_IRUGO); module_init(storvsc_init); module_exit(storvsc_exit); |