/*
- *
* Copyright (c) 2009, Microsoft Corporation.
*
* This program is free software; you can redistribute it and/or modify it
* Authors:
* Haiyang Zhang <haiyangz@microsoft.com>
* Hank Janssen <hjanssen@microsoft.com>
- *
*/
-
#include <linux/init.h>
#include <linux/module.h>
#include <linux/device.h>
#include <linux/blkdev.h>
-
#include <scsi/scsi.h>
#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_tcq.h>
#include <scsi/scsi_eh.h>
#include <scsi/scsi_devinfo.h>
-
#include <scsi/scsi_dbg.h>
-
#include "osd.h"
#include "logging.h"
#include "vmbus.h"
#include "StorVscApi.h"
-/* #defines */
-
-
-
-/* Data types */
-
struct host_device_context {
- struct work_struct host_rescan_work; /* must be 1st field */
- struct device_context *device_ctx; /* point back to our device context */
- struct kmem_cache *request_pool;
- unsigned int port;
- unsigned char path;
- unsigned char target;
+ /* 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 kmem_cache *request_pool;
+ unsigned int port;
+ unsigned char path;
+ unsigned char target;
};
struct storvsc_cmd_request {
- struct list_head entry;
- struct scsi_cmnd *cmd;
+ struct list_head entry;
+ struct scsi_cmnd *cmd;
unsigned int bounce_sgl_count;
- struct scatterlist *bounce_sgl;
+ struct scatterlist *bounce_sgl;
struct hv_storvsc_request request;
/* !!!DO NOT ADD ANYTHING BELOW HERE!!! */
- /* The extension buffer falls right here and is pointed to by request.Extension; */
+ /* The extension buffer falls right here and is pointed to by
+ * request.Extension;
+ * Which sounds like a very bad design... */
};
struct storvsc_driver_context {
/* !! These must be the first 2 fields !! */
- struct driver_context drv_ctx;
+ /* FIXME this is a bug... */
+ struct driver_context drv_ctx;
struct storvsc_driver_object drv_obj;
};
/* Static decl */
static int storvsc_probe(struct device *dev);
-static int storvsc_queuecommand(struct scsi_cmnd *scmnd, void (*done)(struct scsi_cmnd *));
+static int storvsc_queuecommand(struct scsi_cmnd *scmnd,
+ void (*done)(struct scsi_cmnd *));
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 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, unsigned int sg_count, unsigned int len);
-static void destroy_bounce_buffer(struct scatterlist *sgl, unsigned int sg_count);
+static struct scatterlist *create_bounce_buffer(struct scatterlist *sgl,
+ unsigned int sg_count,
+ unsigned int len);
+static void destroy_bounce_buffer(struct scatterlist *sgl,
+ unsigned int sg_count);
static int do_bounce_buffer(struct scatterlist *sgl, unsigned int sg_count);
-static unsigned int copy_from_bounce_buffer(struct scatterlist *orig_sgl, struct scatterlist *bounce_sgl, unsigned int orig_sgl_count);
-static unsigned int copy_to_bounce_buffer(struct scatterlist *orig_sgl, struct scatterlist *bounce_sgl, unsigned int orig_sgl_count);
+static unsigned int copy_from_bounce_buffer(struct scatterlist *orig_sgl,
+ struct scatterlist *bounce_sgl,
+ unsigned int orig_sgl_count);
+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);
+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);
static int storvsc_ringbuffer_size = STORVSC_RING_BUFFER_SIZE;
/* Scsi driver */
static struct scsi_host_template scsi_driver = {
- .module = THIS_MODULE,
- .name = "storvsc_host_t",
- .bios_param = storvsc_get_chs,
- .queuecommand = storvsc_queuecommand,
- .eh_host_reset_handler = storvsc_host_reset_handler,
- .slave_alloc = storvsc_device_alloc,
- .slave_configure = storvsc_device_configure,
- .cmd_per_lun = 1,
- .can_queue = STORVSC_MAX_IO_REQUESTS*STORVSC_MAX_TARGETS, /* 64 max_queue * 1 target */
- .this_id = -1,
+ .module = THIS_MODULE,
+ .name = "storvsc_host_t",
+ .bios_param = storvsc_get_chs,
+ .queuecommand = storvsc_queuecommand,
+ .eh_host_reset_handler = storvsc_host_reset_handler,
+ .slave_alloc = storvsc_device_alloc,
+ .slave_configure = storvsc_device_configure,
+ .cmd_per_lun = 1,
+ /* 64 max_queue * 1 target */
+ .can_queue = STORVSC_MAX_IO_REQUESTS*STORVSC_MAX_TARGETS,
+ .this_id = -1,
/* no use setting to 0 since ll_blk_rw reset it to 1 */
- .sg_tablesize = MAX_MULTIPAGE_BUFFER_COUNT,/* currently 32 */
- /* ENABLE_CLUSTERING allows mutiple physically contig bio_vecs to merge into 1 sg element. If set, we must */
- /* limit the max_segment_size to PAGE_SIZE, otherwise we may get 1 sg element that represents multiple */
+ /* currently 32 */
+ .sg_tablesize = MAX_MULTIPAGE_BUFFER_COUNT,
+ /*
+ * ENABLE_CLUSTERING allows mutiple physically contig bio_vecs to merge
+ * into 1 sg element. If set, we must limit the max_segment_size to
+ * PAGE_SIZE, otherwise we may get 1 sg element that represents
+ * multiple
+ */
/* physically contig pfns (ie sg[x].length > PAGE_SIZE). */
- .use_clustering = ENABLE_CLUSTERING,
+ .use_clustering = ENABLE_CLUSTERING,
/* Make sure we dont get a sg segment crosses a page boundary */
- .dma_boundary = PAGE_SIZE-1,
+ .dma_boundary = PAGE_SIZE-1,
};
-/*++
-
-Name: storvsc_drv_init()
-
-Desc: StorVsc driver initialization.
-
---*/
+/**
+ * storvsc_drv_init - StorVsc driver initialization.
+ */
static int storvsc_drv_init(PFN_DRIVERINITIALIZE pfn_drv_init)
{
- int ret=0;
+ int ret;
struct storvsc_driver_object *storvsc_drv_obj = &g_storvsc_drv.drv_obj;
- struct driver_context *drv_ctx=&g_storvsc_drv.drv_ctx;
+ struct driver_context *drv_ctx = &g_storvsc_drv.drv_ctx;
DPRINT_ENTER(STORVSC_DRV);
/* Callback to client driver to complete the initialization */
pfn_drv_init(&storvsc_drv_obj->Base);
- DPRINT_INFO(STORVSC_DRV, "request extension size %u, max outstanding reqs %u", storvsc_drv_obj->RequestExtSize, storvsc_drv_obj->MaxOutstandingRequestsPerChannel);
-
- if (storvsc_drv_obj->MaxOutstandingRequestsPerChannel < STORVSC_MAX_IO_REQUESTS)
- {
- DPRINT_ERR(STORVSC_DRV, "The number of outstanding io requests (%d) is larger than that supported (%d) internally.",
- STORVSC_MAX_IO_REQUESTS, storvsc_drv_obj->MaxOutstandingRequestsPerChannel);
+ DPRINT_INFO(STORVSC_DRV,
+ "request extension size %u, max outstanding reqs %u",
+ storvsc_drv_obj->RequestExtSize,
+ storvsc_drv_obj->MaxOutstandingRequestsPerChannel);
+
+ if (storvsc_drv_obj->MaxOutstandingRequestsPerChannel <
+ STORVSC_MAX_IO_REQUESTS) {
+ DPRINT_ERR(STORVSC_DRV,
+ "The number of outstanding io requests (%d) "
+ "is larger than that supported (%d) internally.",
+ STORVSC_MAX_IO_REQUESTS,
+ storvsc_drv_obj->MaxOutstandingRequestsPerChannel);
return -1;
}
drv_ctx->driver.name = storvsc_drv_obj->Base.name;
- memcpy(&drv_ctx->class_id, &storvsc_drv_obj->Base.deviceType, sizeof(struct hv_guid));
+ memcpy(&drv_ctx->class_id, &storvsc_drv_obj->Base.deviceType,
+ sizeof(struct hv_guid));
drv_ctx->probe = storvsc_probe;
drv_ctx->remove = storvsc_remove;
return ret;
}
-
static int storvsc_drv_exit_cb(struct device *dev, void *data)
{
struct device **curr = (struct device **)data;
return 1; /* stop iterating */
}
-/*++
-
-Name: storvsc_drv_exit()
-
-Desc:
-
---*/
static void storvsc_drv_exit(void)
{
struct storvsc_driver_object *storvsc_drv_obj = &g_storvsc_drv.drv_obj;
- struct driver_context *drv_ctx=&g_storvsc_drv.drv_ctx;
- struct device *current_dev=NULL;
+ struct driver_context *drv_ctx = &g_storvsc_drv.drv_ctx;
+ struct device *current_dev = NULL;
int ret;
DPRINT_ENTER(STORVSC_DRV);
- while (1)
- {
+ while (1) {
current_dev = NULL;
/* Get the device */
return;
}
-/*++
-
-Name: storvsc_probe()
-
-Desc: Add a new device for this driver
-
---*/
+/**
+ * storvsc_probe - Add a new device for this driver
+ */
static int storvsc_probe(struct device *device)
{
- int ret=0;
-
- struct driver_context *driver_ctx = driver_to_driver_context(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;
-
+ int ret;
+ struct driver_context *driver_ctx =
+ driver_to_driver_context(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 device_context *device_ctx = device_to_device_context(device);
struct hv_device *device_obj = &device_ctx->device_obj;
-
struct Scsi_Host *host;
struct host_device_context *host_device_ctx;
struct storvsc_device_info device_info;
if (!storvsc_drv_obj->Base.OnDeviceAdd)
return -1;
- host = scsi_host_alloc(&scsi_driver, sizeof(struct host_device_context));
- if (!host)
- {
+ host = scsi_host_alloc(&scsi_driver,
+ sizeof(struct host_device_context));
+ if (!host) {
DPRINT_ERR(STORVSC_DRV, "unable to allocate scsi host object");
return -ENOMEM;
}
dev_set_drvdata(device, host);
- host_device_ctx = (struct host_device_context*)host->hostdata;
+ host_device_ctx = (struct host_device_context *)host->hostdata;
memset(host_device_ctx, 0, sizeof(struct host_device_context));
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);
+ 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) + storvsc_drv_obj->RequestExtSize,
- 0,
- SLAB_HWCACHE_ALIGN, NULL);
-
- if (!host_device_ctx->request_pool)
- {
+ kmem_cache_create(dev_name(&device_ctx->device),
+ sizeof(struct storvsc_cmd_request) +
+ storvsc_drv_obj->RequestExtSize, 0,
+ SLAB_HWCACHE_ALIGN, NULL);
+
+ if (!host_device_ctx->request_pool) {
scsi_host_put(host);
DPRINT_EXIT(STORVSC_DRV);
device_info.PortNumber = host->host_no;
/* Call to the vsc driver to add the device */
- ret = storvsc_drv_obj->Base.OnDeviceAdd(device_obj, (void*)&device_info);
- if (ret != 0)
- {
+ ret = storvsc_drv_obj->Base.OnDeviceAdd(device_obj,
+ (void *)&device_info);
+ if (ret != 0) {
DPRINT_ERR(STORVSC_DRV, "unable to add scsi vsc device");
kmem_cache_destroy(host_device_ctx->request_pool);
scsi_host_put(host);
host_device_ctx->path = device_info.PathId;
host_device_ctx->target = device_info.TargetId;
- host->max_lun = STORVSC_MAX_LUNS_PER_TARGET; /* max # of devices per target */
- host->max_id = STORVSC_MAX_TARGETS; /* max # of targets per channel */
- host->max_channel = STORVSC_MAX_CHANNELS -1; /* max # of channels */
+ /* max # of devices per target */
+ host->max_lun = STORVSC_MAX_LUNS_PER_TARGET;
+ /* max # of targets per channel */
+ host->max_id = STORVSC_MAX_TARGETS;
+ /* max # of channels */
+ host->max_channel = STORVSC_MAX_CHANNELS - 1;
/* Register the HBA and start the scsi bus scan */
ret = scsi_add_host(host, device);
- if (ret != 0)
- {
+ if (ret != 0) {
DPRINT_ERR(STORVSC_DRV, "unable to add scsi host device");
storvsc_drv_obj->Base.OnDeviceRemove(device_obj);
return ret;
}
-
-/*++
-
-Name: storvsc_remove()
-
-Desc: Callback when our device is removed
-
---*/
+/**
+ * storvsc_remove - Callback when our device is removed
+ */
static int storvsc_remove(struct device *device)
{
- int ret=0;
-
- struct driver_context *driver_ctx = driver_to_driver_context(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;
-
+ int ret;
+ struct driver_context *driver_ctx =
+ driver_to_driver_context(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 device_context *device_ctx = device_to_device_context(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=(struct host_device_context*)host->hostdata;
+ struct host_device_context *host_device_ctx =
+ (struct host_device_context *)host->hostdata;
DPRINT_ENTER(STORVSC_DRV);
- if (!storvsc_drv_obj->Base.OnDeviceRemove)
- {
+ if (!storvsc_drv_obj->Base.OnDeviceRemove) {
DPRINT_EXIT(STORVSC_DRV);
return -1;
}
- /* Call to the vsc driver to let it know that the device is being removed */
+ /*
+ * Call to the vsc driver to let it know that the device is being
+ * removed
+ */
ret = storvsc_drv_obj->Base.OnDeviceRemove(device_obj);
- if (ret != 0)
- {
+ if (ret != 0) {
/* TODO: */
- DPRINT_ERR(STORVSC, "unable to remove vsc device (ret %d)", ret);
+ DPRINT_ERR(STORVSC, "unable to remove vsc device (ret %d)",
+ ret);
}
- if (host_device_ctx->request_pool)
- {
+ if (host_device_ctx->request_pool) {
kmem_cache_destroy(host_device_ctx->request_pool);
host_device_ctx->request_pool = NULL;
}
return ret;
}
-/*++
-
-Name: storvsc_commmand_completion()
-
-Desc: Command completion processing
-
---*/
+/**
+ * storvsc_commmand_completion - Command completion processing
+ */
static void storvsc_commmand_completion(struct hv_storvsc_request *request)
{
- struct storvsc_cmd_request *cmd_request = (struct storvsc_cmd_request*)request->Context;
+ struct storvsc_cmd_request *cmd_request =
+ (struct storvsc_cmd_request *)request->Context;
struct scsi_cmnd *scmnd = cmd_request->cmd;
- struct host_device_context *host_device_ctx = (struct host_device_context*)scmnd->device->host->hostdata;
+ struct host_device_context *host_device_ctx =
+ (struct host_device_context *)scmnd->device->host->hostdata;
void (*scsi_done_fn)(struct scsi_cmnd *);
struct scsi_sense_hdr sense_hdr;
ASSERT(request == &cmd_request->request);
- ASSERT((unsigned long)scmnd->host_scribble == (unsigned long)cmd_request);
+ ASSERT((unsigned long)scmnd->host_scribble ==
+ (unsigned long)cmd_request);
ASSERT(scmnd);
ASSERT(scmnd->scsi_done);
DPRINT_ENTER(STORVSC_DRV);
- if (cmd_request->bounce_sgl_count)/* using bounce buffer */
- {
+ if (cmd_request->bounce_sgl_count) {
+ /* using bounce buffer */
/* printk("copy_from_bounce_buffer\n"); */
/* FIXME: We can optimize on writes by just skipping this */
- copy_from_bounce_buffer(scsi_sglist(scmnd), cmd_request->bounce_sgl, scsi_sg_count(scmnd));
- destroy_bounce_buffer(cmd_request->bounce_sgl, cmd_request->bounce_sgl_count);
+ copy_from_bounce_buffer(scsi_sglist(scmnd),
+ cmd_request->bounce_sgl,
+ scsi_sg_count(scmnd));
+ destroy_bounce_buffer(cmd_request->bounce_sgl,
+ cmd_request->bounce_sgl_count);
}
scmnd->result = request->Status;
- if (scmnd->result)
- {
- if (scsi_normalize_sense(scmnd->sense_buffer, request->SenseBufferSize, &sense_hdr))
- {
+ if (scmnd->result) {
+ if (scsi_normalize_sense(scmnd->sense_buffer,
+ request->SenseBufferSize, &sense_hdr))
scsi_print_sense_hdr("storvsc", &sense_hdr);
- }
}
ASSERT(request->BytesXfer <= request->DataBuffer.Length);
static int do_bounce_buffer(struct scatterlist *sgl, unsigned int sg_count)
{
- int i=0;
+ int i;
/* No need to check */
if (sg_count < 2)
return -1;
/* We have at least 2 sg entries */
- for ( i=0; i<sg_count; i++ )
- {
- if (i == 0) /* make sure 1st one does not have hole */
- {
+ for (i = 0; i < sg_count; i++) {
+ if (i == 0) {
+ /* make sure 1st one does not have hole */
if (sgl[i].offset + sgl[i].length != PAGE_SIZE)
return i;
- }
- else if (i == sg_count - 1) /* make sure last one does not have hole */
- {
+ } else if (i == sg_count - 1) {
+ /* make sure last one does not have hole */
if (sgl[i].offset != 0)
return i;
- }
- else /* make sure no hole in the middle */
- {
+ } else {
+ /* make sure no hole in the middle */
if (sgl[i].length != PAGE_SIZE || sgl[i].offset != 0)
- {
return i;
- }
}
}
return -1;
}
-static struct scatterlist *create_bounce_buffer(struct scatterlist *sgl, unsigned int sg_count, unsigned int len)
+static struct scatterlist *create_bounce_buffer(struct scatterlist *sgl,
+ unsigned int sg_count,
+ unsigned int len)
{
int i;
- int num_pages=0;
- struct scatterlist* bounce_sgl;
+ int num_pages;
+ struct scatterlist *bounce_sgl;
struct page *page_buf;
num_pages = ALIGN_UP(len, PAGE_SIZE) >> PAGE_SHIFT;
bounce_sgl = kcalloc(num_pages, sizeof(struct scatterlist), GFP_ATOMIC);
if (!bounce_sgl)
- {
return NULL;
- }
- for(i=0; i<num_pages; i++)
- {
+ for (i = 0; i < num_pages; i++) {
page_buf = alloc_page(GFP_ATOMIC);
if (!page_buf)
- {
goto cleanup;
- }
sg_set_page(&bounce_sgl[i], page_buf, 0, 0);
}
return NULL;
}
-static void destroy_bounce_buffer(struct scatterlist *sgl, unsigned int sg_count)
+static void destroy_bounce_buffer(struct scatterlist *sgl,
+ unsigned int sg_count)
{
int i;
struct page *page_buf;
- for (i=0; i<sg_count; i++)
- {
- if ((page_buf = sg_page((&sgl[i]))) != NULL)
-
- {
+ for (i = 0; i < sg_count; i++) {
+ page_buf = sg_page((&sgl[i]));
+ if (page_buf != NULL)
__free_page(page_buf);
- }
}
kfree(sgl);
}
/* Assume the bounce_sgl has enough room ie using the create_bounce_buffer() */
-static unsigned int copy_to_bounce_buffer(struct scatterlist *orig_sgl, struct scatterlist *bounce_sgl, unsigned int orig_sgl_count)
+static unsigned int copy_to_bounce_buffer(struct scatterlist *orig_sgl,
+ struct scatterlist *bounce_sgl,
+ unsigned int orig_sgl_count)
{
- int i=0,j=0;
+ int i;
+ int j = 0;
unsigned long src, dest;
unsigned int srclen, destlen, copylen;
- unsigned int total_copied=0;
- unsigned long bounce_addr=0;
- unsigned long src_addr=0;
+ unsigned int total_copied = 0;
+ unsigned long bounce_addr = 0;
+ unsigned long src_addr = 0;
unsigned long flags;
local_irq_save(flags);
- for (i=0; i<orig_sgl_count; i++)
- {
- src_addr = (unsigned long)kmap_atomic(sg_page((&orig_sgl[i])), KM_IRQ0) + orig_sgl[i].offset;
+ for (i = 0; i < orig_sgl_count; i++) {
+ src_addr = (unsigned long)kmap_atomic(sg_page((&orig_sgl[i])),
+ KM_IRQ0) + orig_sgl[i].offset;
src = src_addr;
srclen = orig_sgl[i].length;
- /* if (PageHighMem(orig_sgl[i].page)) */
- /* printk("HighMem page detected - addr %p", (void*)src); */
-
ASSERT(orig_sgl[i].offset + orig_sgl[i].length <= PAGE_SIZE);
if (j == 0)
- {
bounce_addr = (unsigned long)kmap_atomic(sg_page((&bounce_sgl[j])), KM_IRQ0);
- }
- while (srclen)
- {
+ while (srclen) {
/* assume bounce offset always == 0 */
dest = bounce_addr + bounce_sgl[j].length;
destlen = PAGE_SIZE - bounce_sgl[j].length;
copylen = min(srclen, destlen);
- memcpy((void*)dest, (void*)src, copylen);
+ memcpy((void *)dest, (void *)src, copylen);
total_copied += copylen;
bounce_sgl[j].length += copylen;
srclen -= copylen;
src += copylen;
- if (bounce_sgl[j].length == PAGE_SIZE) /* full..move to next entry */
- {
- kunmap_atomic((void*)bounce_addr, KM_IRQ0);
+ if (bounce_sgl[j].length == PAGE_SIZE) {
+ /* full..move to next entry */
+ kunmap_atomic((void *)bounce_addr, KM_IRQ0);
j++;
/* if we need to use another bounce buffer */
- if (srclen || i != orig_sgl_count -1)
- {
+ if (srclen || i != orig_sgl_count - 1)
bounce_addr = (unsigned long)kmap_atomic(sg_page((&bounce_sgl[j])), KM_IRQ0);
- }
- }
- else if (srclen == 0 && i == orig_sgl_count -1) /* unmap the last bounce that is < PAGE_SIZE */
- {
- kunmap_atomic((void*)bounce_addr, KM_IRQ0);
+ } else if (srclen == 0 && i == orig_sgl_count - 1) {
+ /* unmap the last bounce that is < PAGE_SIZE */
+ kunmap_atomic((void *)bounce_addr, KM_IRQ0);
}
}
- kunmap_atomic((void*)(src_addr - orig_sgl[i].offset), KM_IRQ0);
+ kunmap_atomic((void *)(src_addr - orig_sgl[i].offset), KM_IRQ0);
}
local_irq_restore(flags);
}
/* Assume the original sgl has enough room */
-static unsigned int copy_from_bounce_buffer(struct scatterlist *orig_sgl, struct scatterlist *bounce_sgl, unsigned int orig_sgl_count)
+static unsigned int copy_from_bounce_buffer(struct scatterlist *orig_sgl,
+ struct scatterlist *bounce_sgl,
+ unsigned int orig_sgl_count)
{
- int i=0,j=0;
+ int i;
+ int j = 0;
unsigned long src, dest;
unsigned int srclen, destlen, copylen;
- unsigned int total_copied=0;
- unsigned long bounce_addr=0;
- unsigned long dest_addr=0;
+ unsigned int total_copied = 0;
+ unsigned long bounce_addr = 0;
+ unsigned long dest_addr = 0;
unsigned long flags;
local_irq_save(flags);
- for (i=0; i<orig_sgl_count; i++)
- {
- dest_addr = (unsigned long)kmap_atomic(sg_page((&orig_sgl[i])), KM_IRQ0) + orig_sgl[i].offset;
+ for (i = 0; i < orig_sgl_count; i++) {
+ dest_addr = (unsigned long)kmap_atomic(sg_page((&orig_sgl[i])),
+ KM_IRQ0) + orig_sgl[i].offset;
dest = dest_addr;
destlen = orig_sgl[i].length;
ASSERT(orig_sgl[i].offset + orig_sgl[i].length <= PAGE_SIZE);
if (j == 0)
- {
bounce_addr = (unsigned long)kmap_atomic(sg_page((&bounce_sgl[j])), KM_IRQ0);
- }
- while (destlen)
- {
+ while (destlen) {
src = bounce_addr + bounce_sgl[j].offset;
srclen = bounce_sgl[j].length - bounce_sgl[j].offset;
copylen = min(srclen, destlen);
- memcpy((void*)dest, (void*)src, copylen);
+ memcpy((void *)dest, (void *)src, copylen);
total_copied += copylen;
bounce_sgl[j].offset += copylen;
destlen -= copylen;
dest += copylen;
- if (bounce_sgl[j].offset == bounce_sgl[j].length) /* full */
- {
- kunmap_atomic((void*)bounce_addr, KM_IRQ0);
+ if (bounce_sgl[j].offset == bounce_sgl[j].length) {
+ /* full */
+ kunmap_atomic((void *)bounce_addr, KM_IRQ0);
j++;
/* if we need to use another bounce buffer */
- if (destlen || i != orig_sgl_count -1)
- {
+ if (destlen || i != orig_sgl_count - 1)
bounce_addr = (unsigned long)kmap_atomic(sg_page((&bounce_sgl[j])), KM_IRQ0);
- }
- }
- else if (destlen == 0 && i == orig_sgl_count -1) /* unmap the last bounce that is < PAGE_SIZE */
- {
- kunmap_atomic((void*)bounce_addr, KM_IRQ0);
+ } else if (destlen == 0 && i == orig_sgl_count - 1) {
+ /* unmap the last bounce that is < PAGE_SIZE */
+ kunmap_atomic((void *)bounce_addr, KM_IRQ0);
}
}
- kunmap_atomic((void*)(dest_addr - orig_sgl[i].offset), KM_IRQ0);
+ kunmap_atomic((void *)(dest_addr - orig_sgl[i].offset),
+ KM_IRQ0);
}
local_irq_restore(flags);
return total_copied;
}
-
-/*++
-
-Name: storvsc_queuecommand()
-
-Desc: Initiate command processing
-
---*/
-static int storvsc_queuecommand(struct scsi_cmnd *scmnd, void (*done)(struct scsi_cmnd *))
+/**
+ * storvsc_queuecommand - Initiate command processing
+ */
+static int storvsc_queuecommand(struct scsi_cmnd *scmnd,
+ void (*done)(struct scsi_cmnd *))
{
- int ret=0;
- 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;
-
+ 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 hv_storvsc_request *request;
struct storvsc_cmd_request *cmd_request;
- unsigned int request_size=0;
+ unsigned int request_size = 0;
int i;
struct scatterlist *sgl;
DPRINT_ENTER(STORVSC_DRV);
- DPRINT_DBG(STORVSC_DRV, "scmnd %p dir %d, use_sg %d buf %p len %d queue depth %d tagged %d",
- scmnd,
- scmnd->sc_data_direction,
- scsi_sg_count(scmnd),
- scsi_sglist(scmnd),
- scsi_bufflen(scmnd),
- scmnd->device->queue_depth,
- scmnd->device->tagged_supported);
+ DPRINT_DBG(STORVSC_DRV, "scmnd %p dir %d, use_sg %d buf %p len %d "
+ "queue depth %d tagged %d", scmnd, scmnd->sc_data_direction,
+ scsi_sg_count(scmnd), scsi_sglist(scmnd),
+ scsi_bufflen(scmnd), scmnd->device->queue_depth,
+ scmnd->device->tagged_supported);
/* If retrying, no need to prep the cmd */
- if (scmnd->host_scribble)
- {
+ if (scmnd->host_scribble) {
ASSERT(scmnd->scsi_done != NULL);
- cmd_request = (struct storvsc_cmd_request* )scmnd->host_scribble;
- DPRINT_INFO(STORVSC_DRV, "retrying scmnd %p cmd_request %p", scmnd, cmd_request);
+ cmd_request =
+ (struct storvsc_cmd_request *)scmnd->host_scribble;
+ DPRINT_INFO(STORVSC_DRV, "retrying scmnd %p cmd_request %p",
+ scmnd, cmd_request);
goto retry_request;
}
request_size = sizeof(struct storvsc_cmd_request);
- cmd_request = kmem_cache_alloc(host_device_ctx->request_pool, GFP_ATOMIC);
- if (!cmd_request)
- {
- DPRINT_ERR(STORVSC_DRV, "scmnd (%p) - unable to allocate storvsc_cmd_request...marking queue busy", scmnd);
-
+ cmd_request = kmem_cache_alloc(host_device_ctx->request_pool,
+ GFP_ATOMIC);
+ if (!cmd_request) {
+ DPRINT_ERR(STORVSC_DRV, "scmnd (%p) - unable to allocate "
+ "storvsc_cmd_request...marking queue busy", scmnd);
scmnd->scsi_done = NULL;
return SCSI_MLQUEUE_DEVICE_BUSY;
}
cmd_request->bounce_sgl = NULL;
cmd_request->cmd = scmnd;
- scmnd->host_scribble = (unsigned char*)cmd_request;
+ scmnd->host_scribble = (unsigned char *)cmd_request;
request = &cmd_request->request;
- request->Extension = (void*)((unsigned long)cmd_request + request_size);
- DPRINT_DBG(STORVSC_DRV, "req %p size %d ext %d", request, request_size, storvsc_drv_obj->RequestExtSize);
+ request->Extension =
+ (void *)((unsigned long)cmd_request + request_size);
+ DPRINT_DBG(STORVSC_DRV, "req %p size %d ext %d", request, request_size,
+ storvsc_drv_obj->RequestExtSize);
/* Build the SRB */
- switch(scmnd->sc_data_direction)
- {
+ switch (scmnd->sc_data_direction) {
case DMA_TO_DEVICE:
request->Type = WRITE_TYPE;
break;
request->DataBuffer.Length = scsi_bufflen(scmnd);
- if (scsi_sg_count(scmnd))
- {
- sgl = (struct scatterlist*)scsi_sglist(scmnd);
+ if (scsi_sg_count(scmnd)) {
+ sgl = (struct scatterlist *)scsi_sglist(scmnd);
/* check if we need to bounce the sgl */
- if (do_bounce_buffer(sgl, scsi_sg_count(scmnd)) != -1)
- {
- DPRINT_INFO(STORVSC_DRV, "need to bounce buffer for this scmnd %p", scmnd);
- cmd_request->bounce_sgl = create_bounce_buffer(sgl, scsi_sg_count(scmnd), scsi_bufflen(scmnd));
- if (!cmd_request->bounce_sgl)
- {
- DPRINT_ERR(STORVSC_DRV, "unable to create bounce buffer for this scmnd %p", scmnd);
+ if (do_bounce_buffer(sgl, scsi_sg_count(scmnd)) != -1) {
+ DPRINT_INFO(STORVSC_DRV,
+ "need to bounce buffer for this scmnd %p",
+ scmnd);
+ cmd_request->bounce_sgl =
+ create_bounce_buffer(sgl, scsi_sg_count(scmnd),
+ scsi_bufflen(scmnd));
+ if (!cmd_request->bounce_sgl) {
+ DPRINT_ERR(STORVSC_DRV,
+ "unable to create bounce buffer for "
+ "this scmnd %p", scmnd);
scmnd->scsi_done = NULL;
scmnd->host_scribble = NULL;
- kmem_cache_free(host_device_ctx->request_pool, cmd_request);
+ kmem_cache_free(host_device_ctx->request_pool,
+ cmd_request);
return SCSI_MLQUEUE_HOST_BUSY;
}
- cmd_request->bounce_sgl_count = ALIGN_UP(scsi_bufflen(scmnd), PAGE_SIZE) >> PAGE_SHIFT;
+ cmd_request->bounce_sgl_count =
+ ALIGN_UP(scsi_bufflen(scmnd), PAGE_SIZE) >>
+ PAGE_SHIFT;
- /* printk("bouncing buffer allocated %p original buffer %p\n", bounce_sgl, sgl); */
- /* printk("copy_to_bounce_buffer\n"); */
- /* FIXME: We can optimize on reads by just skipping this */
- copy_to_bounce_buffer(sgl, cmd_request->bounce_sgl, scsi_sg_count(scmnd));
+ /*
+ * FIXME: We can optimize on reads by just skipping
+ * this
+ */
+ copy_to_bounce_buffer(sgl, cmd_request->bounce_sgl,
+ scsi_sg_count(scmnd));
sgl = cmd_request->bounce_sgl;
}
request->DataBuffer.Offset = sgl[0].offset;
- for (i = 0; i < scsi_sg_count(scmnd); i++ )
- {
- DPRINT_DBG(STORVSC_DRV, "sgl[%d] len %d offset %d \n", i, sgl[i].length, sgl[i].offset);
- request->DataBuffer.PfnArray[i] = page_to_pfn(sg_page((&sgl[i])));
+ for (i = 0; i < scsi_sg_count(scmnd); i++) {
+ DPRINT_DBG(STORVSC_DRV, "sgl[%d] len %d offset %d \n",
+ i, sgl[i].length, sgl[i].offset);
+ request->DataBuffer.PfnArray[i] =
+ page_to_pfn(sg_page((&sgl[i])));
}
- }
-
- else if (scsi_sglist(scmnd))
- {
+ } else if (scsi_sglist(scmnd)) {
ASSERT(scsi_bufflen(scmnd) <= PAGE_SIZE);
- request->DataBuffer.Offset = virt_to_phys(scsi_sglist(scmnd)) & (PAGE_SIZE-1);
- request->DataBuffer.PfnArray[0] = virt_to_phys(scsi_sglist(scmnd)) >> PAGE_SHIFT;
- }
- else
- {
+ request->DataBuffer.Offset =
+ virt_to_phys(scsi_sglist(scmnd)) & (PAGE_SIZE-1);
+ request->DataBuffer.PfnArray[0] =
+ virt_to_phys(scsi_sglist(scmnd)) >> PAGE_SHIFT;
+ } else {
ASSERT(scsi_bufflen(scmnd) == 0);
}
retry_request:
-
/* Invokes the vsc to start an IO */
- ret = storvsc_drv_obj->OnIORequest(&device_ctx->device_obj, &cmd_request->request);
- if (ret == -1) /* no more space */
- {
- DPRINT_ERR(STORVSC_DRV, "scmnd (%p) - queue FULL...marking queue busy", scmnd);
-
- if (cmd_request->bounce_sgl_count)
- {
- /* FIXME: We can optimize on writes by just skipping this */
- copy_from_bounce_buffer(scsi_sglist(scmnd), cmd_request->bounce_sgl, scsi_sg_count(scmnd));
- destroy_bounce_buffer(cmd_request->bounce_sgl, cmd_request->bounce_sgl_count);
+ ret = storvsc_drv_obj->OnIORequest(&device_ctx->device_obj,
+ &cmd_request->request);
+ if (ret == -1) {
+ /* no more space */
+ DPRINT_ERR(STORVSC_DRV,
+ "scmnd (%p) - queue FULL...marking queue busy",
+ scmnd);
+
+ if (cmd_request->bounce_sgl_count) {
+ /*
+ * FIXME: We can optimize on writes by just skipping
+ * this
+ */
+ copy_from_bounce_buffer(scsi_sglist(scmnd),
+ cmd_request->bounce_sgl,
+ scsi_sg_count(scmnd));
+ destroy_bounce_buffer(cmd_request->bounce_sgl,
+ cmd_request->bounce_sgl_count);
}
kmem_cache_free(host_device_ctx->request_pool, cmd_request);
return ret;
}
-static int storvsc_merge_bvec(struct request_queue *q, struct bvec_merge_data *bmd, struct bio_vec *bvec)
+static int storvsc_merge_bvec(struct request_queue *q,
+ struct bvec_merge_data *bmd, struct bio_vec *bvec)
{
- return bvec->bv_len; /* checking done by caller. */
+ /* checking done by caller. */
+ return bvec->bv_len;
}
-/*++
-
-Name: storvsc_device_configure()
-
-Desc: Configure the specified scsi device
-
---*/
+/**
+ * storvsc_device_configure - Configure the specified scsi device
+ */
static int storvsc_device_alloc(struct scsi_device *sdevice)
{
- DPRINT_DBG(STORVSC_DRV, "sdev (%p) - setting device flag to %d", sdevice, BLIST_SPARSELUN);
- /* This enables luns to be located sparsely. Otherwise, we may not discovered them. */
+ DPRINT_DBG(STORVSC_DRV, "sdev (%p) - setting device flag to %d",
+ sdevice, BLIST_SPARSELUN);
+ /*
+ * This enables luns to be located sparsely. Otherwise, we may not
+ * discovered them.
+ */
sdevice->sdev_bflags |= BLIST_SPARSELUN | BLIST_LARGELUN;
return 0;
}
static int storvsc_device_configure(struct scsi_device *sdevice)
{
- DPRINT_INFO(STORVSC_DRV, "sdev (%p) - curr queue depth %d", sdevice, sdevice->queue_depth);
+ DPRINT_INFO(STORVSC_DRV, "sdev (%p) - curr queue depth %d", sdevice,
+ sdevice->queue_depth);
- DPRINT_INFO(STORVSC_DRV, "sdev (%p) - setting queue depth to %d", sdevice, STORVSC_MAX_IO_REQUESTS);
- scsi_adjust_queue_depth(sdevice, MSG_SIMPLE_TAG, STORVSC_MAX_IO_REQUESTS);
+ DPRINT_INFO(STORVSC_DRV, "sdev (%p) - setting queue depth to %d",
+ sdevice, STORVSC_MAX_IO_REQUESTS);
+ scsi_adjust_queue_depth(sdevice, MSG_SIMPLE_TAG,
+ STORVSC_MAX_IO_REQUESTS);
- DPRINT_INFO(STORVSC_DRV, "sdev (%p) - setting max segment size to %ld", sdevice, PAGE_SIZE);
+ DPRINT_INFO(STORVSC_DRV, "sdev (%p) - setting max segment size to %ld",
+ sdevice, PAGE_SIZE);
blk_queue_max_segment_size(sdevice->request_queue, PAGE_SIZE);
- DPRINT_INFO(STORVSC_DRV, "sdev (%p) - adding merge bio vec routine", sdevice);
+ DPRINT_INFO(STORVSC_DRV, "sdev (%p) - adding merge bio vec routine",
+ sdevice);
blk_queue_merge_bvec(sdevice->request_queue, storvsc_merge_bvec);
blk_queue_bounce_limit(sdevice->request_queue, BLK_BOUNCE_ANY);
return 0;
}
-/*++
-
-Name: storvsc_host_reset_handler()
-
-Desc: Reset the scsi HBA
-
---*/
+/**
+ * storvsc_host_reset_handler - Reset the scsi HBA
+ */
static int storvsc_host_reset_handler(struct scsi_cmnd *scmnd)
{
- int ret=SUCCESS;
- struct host_device_context *host_device_ctx = (struct host_device_context*)scmnd->device->host->hostdata;
+ 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 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 storvsc_driver_object *storvsc_drv_obj =
+ &storvsc_drv_ctx->drv_obj;
DPRINT_ENTER(STORVSC_DRV);
- DPRINT_INFO(STORVSC_DRV, "sdev (%p) dev obj (%p) - host resetting...", scmnd->device, &device_ctx->device_obj);
+ DPRINT_INFO(STORVSC_DRV, "sdev (%p) dev obj (%p) - host resetting...",
+ 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);
- if (ret != 0)
- {
+ if (ret != 0) {
DPRINT_EXIT(STORVSC_DRV);
return ret;
}
- DPRINT_INFO(STORVSC_DRV, "sdev (%p) dev obj (%p) - host reseted", scmnd->device, &device_ctx->device_obj);
+ DPRINT_INFO(STORVSC_DRV, "sdev (%p) dev obj (%p) - host reseted",
+ scmnd->device, &device_ctx->device_obj);
DPRINT_EXIT(STORVSC_DRV);
return ret;
}
-/*++
-
-Name: storvsc_host_rescan
-
-Desc: Rescan the scsi HBA
-
---*/
+/**
+ * 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 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 sdevs_count = 0;
unsigned int found;
unsigned int i;
- unsigned int lun_count=0;
+ 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)
- {
+ 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)
- {
+ 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);
+ 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;
+ 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);
+ 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++)
- {
+ 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)
- {
+ /* 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])
- {
+ 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);
+ 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);
+ 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]))
- {
+ 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);
+ 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)
+static int storvsc_report_luns(struct scsi_device *sdev, unsigned int luns[],
+ unsigned int *lun_count)
{
- int i,j;
- unsigned int lun=0;
+ 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};
- unsigned int report_len = 8*(STORVSC_MAX_LUNS_PER_TARGET+1); /* Add 1 to cover the report_lun header */
+ 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;
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);
+ *(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)
- {
+ 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]);
+ report_len = be32_to_cpu(*(unsigned int *)&report_luns[0]);
num_luns = (report_len / sizeof(unsigned long long));
- if (num_luns > in_lun_count)
- {
+ 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);
+ 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++)
- {
+ 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));
- }
+ 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;
}
static void storvsc_host_rescan(struct hv_device *device_obj)
{
- struct device_context* device_ctx = to_device_context(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;
+ 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);
+ 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 */
+ /*
+ * 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)
+static int storvsc_get_chs(struct scsi_device *sdev, struct block_device * bdev,
+ sector_t capacity, int *info)
{
sector_t total_sectors = capacity;
- sector_t cylinder_times_heads=0;
- sector_t temp=0;
+ sector_t cylinder_times_heads = 0;
+ sector_t temp = 0;
- int sectors_per_track=0;
- int heads=0;
- int cylinders=0;
- int rem=0;
+ int sectors_per_track = 0;
+ int heads = 0;
+ int cylinders = 0;
+ int rem = 0;
- if (total_sectors > (65535 * 16 * 255)) {
- total_sectors = (65535 * 16 * 255);
- }
+ if (total_sectors > (65535 * 16 * 255))
+ total_sectors = (65535 * 16 * 255);
- if (total_sectors >= (65535 * 16 * 63)) {
- sectors_per_track = 255;
- heads = 16;
+ if (total_sectors >= (65535 * 16 * 63)) {
+ sectors_per_track = 255;
+ heads = 16;
cylinder_times_heads = total_sectors;
- rem = sector_div(cylinder_times_heads, sectors_per_track); /* sector_div stores the quotient in cylinder_times_heads */
- }
- else
- {
- sectors_per_track = 17;
+ /* sector_div stores the quotient in cylinder_times_heads */
+ rem = sector_div(cylinder_times_heads, sectors_per_track);
+ } else {
+ sectors_per_track = 17;
cylinder_times_heads = total_sectors;
- rem = sector_div(cylinder_times_heads, sectors_per_track); /* sector_div stores the quotient in cylinder_times_heads */
+ /* sector_div stores the quotient in cylinder_times_heads */
+ rem = sector_div(cylinder_times_heads, sectors_per_track);
temp = cylinder_times_heads + 1023;
- rem = sector_div(temp, 1024); /* sector_div stores the quotient in temp */
+ /* sector_div stores the quotient in temp */
+ rem = sector_div(temp, 1024);
heads = temp;
- if (heads < 4) {
- heads = 4;
- }
+ if (heads < 4)
+ heads = 4;
- if (cylinder_times_heads >= (heads * 1024) || (heads > 16)) {
- sectors_per_track = 31;
- heads = 16;
+ if (cylinder_times_heads >= (heads * 1024) || (heads > 16)) {
+ sectors_per_track = 31;
+ heads = 16;
cylinder_times_heads = total_sectors;
- rem = sector_div(cylinder_times_heads, sectors_per_track); /* sector_div stores the quotient in cylinder_times_heads */
- }
+ /*
+ * sector_div stores the quotient in
+ * cylinder_times_heads
+ */
+ rem = sector_div(cylinder_times_heads,
+ sectors_per_track);
+ }
- if (cylinder_times_heads >= (heads * 1024)) {
- sectors_per_track = 63;
- heads = 16;
+ if (cylinder_times_heads >= (heads * 1024)) {
+ sectors_per_track = 63;
+ heads = 16;
cylinder_times_heads = total_sectors;
- rem = sector_div(cylinder_times_heads, sectors_per_track); /* sector_div stores the quotient in cylinder_times_heads */
- }
- }
+ /*
+ * sector_div stores the quotient in
+ * cylinder_times_heads
+ */
+ rem = sector_div(cylinder_times_heads,
+ sectors_per_track);
+ }
+ }
temp = cylinder_times_heads;
- rem = sector_div(temp, heads); /* sector_div stores the quotient in temp */
+ /* sector_div stores the quotient in temp */
+ rem = sector_div(temp, heads);
cylinders = temp;
info[0] = heads;
- info[1] = sectors_per_track;
- info[2] = cylinders;
+ info[1] = sectors_per_track;
+ info[2] = cylinders;
- DPRINT_INFO(STORVSC_DRV, "CHS (%d, %d, %d)", cylinders, heads, sectors_per_track);
+ DPRINT_INFO(STORVSC_DRV, "CHS (%d, %d, %d)", cylinders, heads,
+ sectors_per_track);
return 0;
}
-MODULE_LICENSE("GPL");
-
static int __init storvsc_init(void)
{
int ret;
DPRINT_ENTER(STORVSC_DRV);
-
DPRINT_INFO(STORVSC_DRV, "Storvsc initializing....");
-
ret = storvsc_drv_init(StorVscInitialize);
-
DPRINT_EXIT(STORVSC_DRV);
-
return ret;
}
static void __exit storvsc_exit(void)
{
DPRINT_ENTER(STORVSC_DRV);
-
storvsc_drv_exit();
-
DPRINT_ENTER(STORVSC_DRV);
}
+MODULE_LICENSE("GPL");
module_param(storvsc_ringbuffer_size, int, S_IRUGO);
-
module_init(storvsc_init);
module_exit(storvsc_exit);
-
-/* eof */
projects / platform / kernel / linux-stable.git / commitdiff