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Commit ff568d3a authored by Greg Kroah-Hartman's avatar Greg Kroah-Hartman
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Staging: hv: coding style cleanup for storvsc_drv.c 

Where's the hazard pay for cleaning up this mess...

Cc: Hank Janssen <hjanssen@microsoft.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent 90c9960e
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Showing with 470 additions and 464 deletions
drivers/staging/hv/storvsc_drv.c
View file @ ff568d3a
/*
*
* Copyright (c) 2009, Microsoft Corporation.
*
* This program is free software; you can redistribute it and/or modify it
......@@ -18,14 +17,11 @@
* 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>
......@@ -33,66 +29,75 @@
#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;
......@@ -102,39 +107,41 @@ static struct storvsc_driver_context g_storvsc_drv;
/* 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);
......@@ -146,17 +153,24 @@ static int storvsc_drv_init(PFN_DRIVERINITIALIZE pfn_drv_init)
/* 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;
......@@ -169,7 +183,6 @@ static int storvsc_drv_init(PFN_DRIVERINITIALIZE pfn_drv_init)
return ret;
}
static int storvsc_drv_exit_cb(struct device *dev, void *data)
{
struct device **curr = (struct device **)data;
......@@ -177,24 +190,16 @@ static int storvsc_drv_exit_cb(struct device *dev, void *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 */
......@@ -223,24 +228,20 @@ static void storvsc_drv_exit(void)
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;
......@@ -250,32 +251,31 @@ static int storvsc_probe(struct device *device)
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);
......@@ -284,9 +284,9 @@ static int storvsc_probe(struct device *device)
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);
......@@ -299,14 +299,16 @@ static int storvsc_probe(struct device *device)
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);
......@@ -325,47 +327,44 @@ static int storvsc_probe(struct device *device)
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;
}
......@@ -381,45 +380,45 @@ static int storvsc_remove(struct device *device)
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);
......@@ -440,58 +439,50 @@ static void storvsc_commmand_completion(struct hv_storvsc_request *request)
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);
}
......@@ -502,84 +493,76 @@ static struct scatterlist *create_bounce_buffer(struct scatterlist *sgl, unsigne
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);
......@@ -588,61 +571,59 @@ static unsigned int copy_to_bounce_buffer(struct scatterlist *orig_sgl, struct s
}
/* 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);
......@@ -650,47 +631,44 @@ static unsigned int copy_from_bounce_buffer(struct scatterlist *orig_sgl, struct
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;
}
......@@ -702,11 +680,11 @@ static int storvsc_queuecommand(struct scsi_cmnd *scmnd, void (*done)(struct scs
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;
}
......@@ -716,16 +694,17 @@ static int storvsc_queuecommand(struct scsi_cmnd *scmnd, void (*done)(struct scs
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;
......@@ -755,69 +734,82 @@ static int storvsc_queuecommand(struct scsi_cmnd *scmnd, void (*done)(struct scs
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);
......@@ -833,37 +825,44 @@ static int storvsc_queuecommand(struct scsi_cmnd *scmnd, void (*done)(struct scs
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);
......@@ -872,78 +871,75 @@ static int storvsc_device_configure(struct scsi_device *sdevice)
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;
......@@ -952,65 +948,67 @@ static void storvsc_host_rescan_callback(struct work_struct *work)
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);
......@@ -1018,16 +1016,18 @@ static void storvsc_host_rescan_callback(struct work_struct *work)
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;
......@@ -1035,45 +1035,44 @@ static int storvsc_report_luns(struct scsi_device *sdev, unsigned int luns[], un
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;
}
......@@ -1084,119 +1083,126 @@ static int storvsc_report_luns(struct scsi_device *sdev, unsigned int luns[], un
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 */
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