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Staging: hv: Eliminate driver_context structure

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We need to move the following elements from struct driver_context:
class_id and driver in one step. As part of this operation get rid of
the struct driver_context. With this patch we will have
consolidated all driver state into one data structure:
struct hv_driver.

Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Abhishek Kane <v-abkane@microsoft.com>
Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: Hank Janssen <hjanssen@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
K. Y. Srinivasan 2011-03-07 13:32:31 -08:00 committed by Greg Kroah-Hartman
parent 06de23f788
commit 150f93989e
7 changed files with 103 additions and 118 deletions
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43
drivers/staging/hv/blkvsc_drv.c
View File

@ -117,9 +117,6 @@ struct block_device_context {
/* Per driver */
struct blkvsc_driver_context {
/* !! These must be the first 2 fields !! */
/* FIXME this is a bug! */
struct driver_context drv_ctx;
struct storvsc_driver_object drv_obj;
};
@ -174,24 +171,24 @@ static const struct block_device_operations block_ops = {
static int blkvsc_drv_init(int (*drv_init)(struct hv_driver *drv))
{
struct storvsc_driver_object *storvsc_drv_obj = &g_blkvsc_drv.drv_obj;
struct driver_context *drv_ctx = &g_blkvsc_drv.drv_ctx;
struct hv_driver *drv = &g_blkvsc_drv.drv_obj.base;
int ret;
storvsc_drv_obj->ring_buffer_size = blkvsc_ringbuffer_size;
drv->priv = storvsc_drv_obj;
/* Callback to client driver to complete the initialization */
drv_init(&storvsc_drv_obj->base);
drv_ctx->driver.name = storvsc_drv_obj->base.name;
memcpy(&drv_ctx->class_id, &storvsc_drv_obj->base.dev_type,
sizeof(struct hv_guid));
drv->driver.name = storvsc_drv_obj->base.name;
drv_ctx->driver.probe = blkvsc_probe;
drv_ctx->driver.remove = blkvsc_remove;
drv_ctx->driver.shutdown = blkvsc_shutdown;
drv->driver.probe = blkvsc_probe;
drv->driver.remove = blkvsc_remove;
drv->driver.shutdown = blkvsc_shutdown;
/* The driver belongs to vmbus */
ret = vmbus_child_driver_register(&drv_ctx->driver);
ret = vmbus_child_driver_register(&drv->driver);
return ret;
}
@ -206,7 +203,7 @@ static int blkvsc_drv_exit_cb(struct device *dev, void *data)
static void blkvsc_drv_exit(void)
{
struct storvsc_driver_object *storvsc_drv_obj = &g_blkvsc_drv.drv_obj;
struct driver_context *drv_ctx = &g_blkvsc_drv.drv_ctx;
struct hv_driver *drv = &g_blkvsc_drv.drv_obj.base;
struct device *current_dev;
int ret;
@ -214,7 +211,7 @@ static void blkvsc_drv_exit(void)
current_dev = NULL;
/* Get the device */
ret = driver_for_each_device(&drv_ctx->driver, NULL,
ret = driver_for_each_device(&drv->driver, NULL,
(void *) &current_dev,
blkvsc_drv_exit_cb);
@ -233,7 +230,7 @@ static void blkvsc_drv_exit(void)
if (storvsc_drv_obj->base.cleanup)
storvsc_drv_obj->base.cleanup(&storvsc_drv_obj->base);
vmbus_child_driver_unregister(&drv_ctx->driver);
vmbus_child_driver_unregister(&drv->driver);
return;
}
@ -243,10 +240,10 @@ static void blkvsc_drv_exit(void)
*/
static int blkvsc_probe(struct device *device)
{
struct driver_context *driver_ctx =
driver_to_driver_context(device->driver);
struct hv_driver *drv =
drv_to_hv_drv(device->driver);
struct blkvsc_driver_context *blkvsc_drv_ctx =
(struct blkvsc_driver_context *)driver_ctx;
(struct blkvsc_driver_context *)drv->priv;
struct storvsc_driver_object *storvsc_drv_obj =
&blkvsc_drv_ctx->drv_obj;
struct vm_device *device_ctx = device_to_vm_device(device);
@ -728,10 +725,10 @@ static int blkvsc_do_read_capacity16(struct block_device_context *blkdev)
*/
static int blkvsc_remove(struct device *device)
{
struct driver_context *driver_ctx =
driver_to_driver_context(device->driver);
struct hv_driver *drv =
drv_to_hv_drv(device->driver);
struct blkvsc_driver_context *blkvsc_drv_ctx =
(struct blkvsc_driver_context *)driver_ctx;
(struct blkvsc_driver_context *)drv->priv;
struct storvsc_driver_object *storvsc_drv_obj =
&blkvsc_drv_ctx->drv_obj;
struct vm_device *device_ctx = device_to_vm_device(device);
@ -851,10 +848,10 @@ static int blkvsc_submit_request(struct blkvsc_request *blkvsc_req,
{
struct block_device_context *blkdev = blkvsc_req->dev;
struct vm_device *device_ctx = blkdev->device_ctx;
struct driver_context *driver_ctx =
driver_to_driver_context(device_ctx->device.driver);
struct hv_driver *drv =
drv_to_hv_drv(device_ctx->device.driver);
struct blkvsc_driver_context *blkvsc_drv_ctx =
(struct blkvsc_driver_context *)driver_ctx;
(struct blkvsc_driver_context *)drv->priv;
struct storvsc_driver_object *storvsc_drv_obj =
&blkvsc_drv_ctx->drv_obj;
struct hv_storvsc_request *storvsc_req;

32
drivers/staging/hv/hv_mouse.c
View File

@ -778,7 +778,6 @@ struct input_device_context {
};
struct mousevsc_driver_context {
struct driver_context drv_ctx;
struct mousevsc_drv_obj drv_obj;
};
@ -823,10 +822,10 @@ static int mousevsc_probe(struct device *device)
{
int ret = 0;
struct driver_context *driver_ctx =
driver_to_driver_context(device->driver);
struct hv_driver *drv =
drv_to_hv_drv(device->driver);
struct mousevsc_driver_context *mousevsc_drv_ctx =
(struct mousevsc_driver_context *)driver_ctx;
(struct mousevsc_driver_context *)drv->priv;
struct mousevsc_drv_obj *mousevsc_drv_obj = &mousevsc_drv_ctx->drv_obj;
struct vm_device *device_ctx = device_to_vm_device(device);
@ -854,10 +853,10 @@ static int mousevsc_remove(struct device *device)
{
int ret = 0;
struct driver_context *driver_ctx =
driver_to_driver_context(device->driver);
struct hv_driver *drv =
drv_to_hv_drv(device->driver);
struct mousevsc_driver_context *mousevsc_drv_ctx =
(struct mousevsc_driver_context *)driver_ctx;
(struct mousevsc_driver_context *)drv->priv;
struct mousevsc_drv_obj *mousevsc_drv_obj = &mousevsc_drv_ctx->drv_obj;
struct vm_device *device_ctx = device_to_vm_device(device);
@ -958,7 +957,7 @@ static int mousevsc_drv_exit_cb(struct device *dev, void *data)
static void mousevsc_drv_exit(void)
{
struct mousevsc_drv_obj *mousevsc_drv_obj = &g_mousevsc_drv.drv_obj;
struct driver_context *drv_ctx = &g_mousevsc_drv.drv_ctx;
struct hv_driver *drv = &g_mousevsc_drv.drv_obj.Base;
int ret;
struct device *current_dev = NULL;
@ -967,7 +966,7 @@ static void mousevsc_drv_exit(void)
current_dev = NULL;
/* Get the device */
ret = driver_for_each_device(&drv_ctx->driver, NULL,
ret = driver_for_each_device(&drv->driver, NULL,
(void *)&current_dev,
mousevsc_drv_exit_cb);
if (ret)
@ -983,7 +982,7 @@ static void mousevsc_drv_exit(void)
if (mousevsc_drv_obj->Base.cleanup)
mousevsc_drv_obj->Base.cleanup(&mousevsc_drv_obj->Base);
vmbus_child_driver_unregister(&drv_ctx->driver);
vmbus_child_driver_unregister(&drv->driver);
return;
}
@ -1010,22 +1009,21 @@ static int mouse_vsc_initialize(struct hv_driver *Driver)
static int __init mousevsc_init(void)
{
struct mousevsc_drv_obj *input_drv_obj = &g_mousevsc_drv.drv_obj;
struct driver_context *drv_ctx = &g_mousevsc_drv.drv_ctx;
struct hv_driver *drv = &g_mousevsc_drv.drv_obj.Base;
DPRINT_INFO(INPUTVSC_DRV, "Hyper-V Mouse driver initializing.");
/* Callback to client driver to complete the initialization */
mouse_vsc_initialize(&input_drv_obj->Base);
drv_ctx->driver.name = input_drv_obj->Base.name;
memcpy(&drv_ctx->class_id, &input_drv_obj->Base.dev_type,
sizeof(struct hv_guid));
drv->driver.name = input_drv_obj->Base.name;
drv->priv = input_drv_obj;
drv_ctx->driver.probe = mousevsc_probe;
drv_ctx->driver.remove = mousevsc_remove;
drv->driver.probe = mousevsc_probe;
drv->driver.remove = mousevsc_remove;
/* The driver belongs to vmbus */
vmbus_child_driver_register(&drv_ctx->driver);
vmbus_child_driver_register(&drv->driver);
return 0;
}

40
drivers/staging/hv/netvsc_drv.c
View File

@ -49,9 +49,6 @@ struct net_device_context {
};
struct netvsc_driver_context {
/* !! These must be the first 2 fields !! */
/* Which is a bug FIXME! */
struct driver_context drv_ctx;
struct netvsc_driver drv_obj;
};
@ -135,10 +132,10 @@ static void netvsc_xmit_completion(void *context)
static int netvsc_start_xmit(struct sk_buff *skb, struct net_device *net)
{
struct net_device_context *net_device_ctx = netdev_priv(net);
struct driver_context *driver_ctx =
driver_to_driver_context(net_device_ctx->device_ctx->device.driver);
struct hv_driver *drv =
drv_to_hv_drv(net_device_ctx->device_ctx->device.driver);
struct netvsc_driver_context *net_drv_ctx =
(struct netvsc_driver_context *)driver_ctx;
(struct netvsc_driver_context *)drv->priv;
struct netvsc_driver *net_drv_obj = &net_drv_ctx->drv_obj;
struct hv_netvsc_packet *packet;
int ret;
@ -340,10 +337,10 @@ static const struct net_device_ops device_ops = {
static int netvsc_probe(struct device *device)
{
struct driver_context *driver_ctx =
driver_to_driver_context(device->driver);
struct hv_driver *drv =
drv_to_hv_drv(device->driver);
struct netvsc_driver_context *net_drv_ctx =
(struct netvsc_driver_context *)driver_ctx;
(struct netvsc_driver_context *)drv->priv;
struct netvsc_driver *net_drv_obj = &net_drv_ctx->drv_obj;
struct vm_device *device_ctx = device_to_vm_device(device);
struct hv_device *device_obj = &device_ctx->device_obj;
@ -412,10 +409,10 @@ static int netvsc_probe(struct device *device)
static int netvsc_remove(struct device *device)
{
struct driver_context *driver_ctx =
driver_to_driver_context(device->driver);
struct hv_driver *drv =
drv_to_hv_drv(device->driver);
struct netvsc_driver_context *net_drv_ctx =
(struct netvsc_driver_context *)driver_ctx;
(struct netvsc_driver_context *)drv->priv;
struct netvsc_driver *net_drv_obj = &net_drv_ctx->drv_obj;
struct vm_device *device_ctx = device_to_vm_device(device);
struct net_device *net = dev_get_drvdata(&device_ctx->device);
@ -462,7 +459,7 @@ static int netvsc_drv_exit_cb(struct device *dev, void *data)
static void netvsc_drv_exit(void)
{
struct netvsc_driver *netvsc_drv_obj = &g_netvsc_drv.drv_obj;
struct driver_context *drv_ctx = &g_netvsc_drv.drv_ctx;
struct hv_driver *drv = &g_netvsc_drv.drv_obj.base;
struct device *current_dev;
int ret;
@ -470,7 +467,7 @@ static void netvsc_drv_exit(void)
current_dev = NULL;
/* Get the device */
ret = driver_for_each_device(&drv_ctx->driver, NULL,
ret = driver_for_each_device(&drv->driver, NULL,
&current_dev, netvsc_drv_exit_cb);
if (ret)
DPRINT_WARN(NETVSC_DRV,
@ -489,7 +486,7 @@ static void netvsc_drv_exit(void)
if (netvsc_drv_obj->base.cleanup)
netvsc_drv_obj->base.cleanup(&netvsc_drv_obj->base);
vmbus_child_driver_unregister(&drv_ctx->driver);
vmbus_child_driver_unregister(&drv->driver);
return;
}
@ -497,25 +494,24 @@ static void netvsc_drv_exit(void)
static int netvsc_drv_init(int (*drv_init)(struct hv_driver *drv))
{
struct netvsc_driver *net_drv_obj = &g_netvsc_drv.drv_obj;
struct driver_context *drv_ctx = &g_netvsc_drv.drv_ctx;
struct hv_driver *drv = &g_netvsc_drv.drv_obj.base;
int ret;
net_drv_obj->ring_buf_size = ring_size * PAGE_SIZE;
net_drv_obj->recv_cb = netvsc_recv_callback;
net_drv_obj->link_status_change = netvsc_linkstatus_callback;
drv->priv = net_drv_obj;
/* Callback to client driver to complete the initialization */
drv_init(&net_drv_obj->base);
drv_ctx->driver.name = net_drv_obj->base.name;
memcpy(&drv_ctx->class_id, &net_drv_obj->base.dev_type,
sizeof(struct hv_guid));
drv->driver.name = net_drv_obj->base.name;
drv_ctx->driver.probe = netvsc_probe;
drv_ctx->driver.remove = netvsc_remove;
drv->driver.probe = netvsc_probe;
drv->driver.remove = netvsc_remove;
/* The driver belongs to vmbus */
ret = vmbus_child_driver_register(&drv_ctx->driver);
ret = vmbus_child_driver_register(&drv->driver);
return ret;
}

41
drivers/staging/hv/storvsc_drv.c
View File

@ -64,9 +64,6 @@ struct storvsc_cmd_request {
};
struct storvsc_driver_context {
/* !! These must be the first 2 fields !! */
/* FIXME this is a bug... */
struct driver_context drv_ctx;
struct storvsc_driver_object drv_obj;
};
@ -138,13 +135,15 @@ static int storvsc_drv_init(int (*drv_init)(struct hv_driver *drv))
{
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 hv_driver *drv = &g_storvsc_drv.drv_obj.base;
storvsc_drv_obj->ring_buffer_size = storvsc_ringbuffer_size;
/* Callback to client driver to complete the initialization */
drv_init(&storvsc_drv_obj->base);
drv->priv = storvsc_drv_obj;
DPRINT_INFO(STORVSC_DRV,
"request extension size %u, max outstanding reqs %u",
storvsc_drv_obj->request_ext_size,
@ -160,15 +159,13 @@ static int storvsc_drv_init(int (*drv_init)(struct hv_driver *drv))
return -1;
}
drv_ctx->driver.name = storvsc_drv_obj->base.name;
memcpy(&drv_ctx->class_id, &storvsc_drv_obj->base.dev_type,
sizeof(struct hv_guid));
drv->driver.name = storvsc_drv_obj->base.name;
drv_ctx->driver.probe = storvsc_probe;
drv_ctx->driver.remove = storvsc_remove;
drv->driver.probe = storvsc_probe;
drv->driver.remove = storvsc_remove;
/* The driver belongs to vmbus */
ret = vmbus_child_driver_register(&drv_ctx->driver);
ret = vmbus_child_driver_register(&drv->driver);
return ret;
}
@ -183,7 +180,7 @@ static int storvsc_drv_exit_cb(struct device *dev, void *data)
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 hv_driver *drv = &g_storvsc_drv.drv_obj.base;
struct device *current_dev = NULL;
int ret;
@ -191,7 +188,7 @@ static void storvsc_drv_exit(void)
current_dev = NULL;
/* Get the device */
ret = driver_for_each_device(&drv_ctx->driver, NULL,
ret = driver_for_each_device(&drv->driver, NULL,
(void *) &current_dev,
storvsc_drv_exit_cb);
@ -209,7 +206,7 @@ static void storvsc_drv_exit(void)
if (storvsc_drv_obj->base.cleanup)
storvsc_drv_obj->base.cleanup(&storvsc_drv_obj->base);
vmbus_child_driver_unregister(&drv_ctx->driver);
vmbus_child_driver_unregister(&drv->driver);
return;
}
@ -219,10 +216,10 @@ static void storvsc_drv_exit(void)
static int storvsc_probe(struct device *device)
{
int ret;
struct driver_context *driver_ctx =
driver_to_driver_context(device->driver);
struct hv_driver *drv =
drv_to_hv_drv(device->driver);
struct storvsc_driver_context *storvsc_drv_ctx =
(struct storvsc_driver_context *)driver_ctx;
(struct storvsc_driver_context *)drv->priv;
struct storvsc_driver_object *storvsc_drv_obj =
&storvsc_drv_ctx->drv_obj;
struct vm_device *device_ctx = device_to_vm_device(device);
@ -304,10 +301,10 @@ static int storvsc_probe(struct device *device)
static int storvsc_remove(struct device *device)
{
int ret;
struct driver_context *driver_ctx =
driver_to_driver_context(device->driver);
struct hv_driver *drv =
drv_to_hv_drv(device->driver);
struct storvsc_driver_context *storvsc_drv_ctx =
(struct storvsc_driver_context *)driver_ctx;
(struct storvsc_driver_context *)drv->priv;
struct storvsc_driver_object *storvsc_drv_obj =
&storvsc_drv_ctx->drv_obj;
struct vm_device *device_ctx = device_to_vm_device(device);
@ -602,10 +599,10 @@ static int storvsc_queuecommand_lck(struct scsi_cmnd *scmnd,
struct host_device_context *host_device_ctx =
(struct host_device_context *)scmnd->device->host->hostdata;
struct vm_device *device_ctx = host_device_ctx->device_ctx;
struct driver_context *driver_ctx =
driver_to_driver_context(device_ctx->device.driver);
struct hv_driver *drv =
drv_to_hv_drv(device_ctx->device.driver);
struct storvsc_driver_context *storvsc_drv_ctx =
(struct storvsc_driver_context *)driver_ctx;
(struct storvsc_driver_context *)drv->priv;
struct storvsc_driver_object *storvsc_drv_obj =
&storvsc_drv_ctx->drv_obj;
struct hv_storvsc_request *request;

10
drivers/staging/hv/vmbus.h
View File

@ -28,12 +28,6 @@
#include <linux/device.h>
#include "vmbus_api.h"
struct driver_context {
struct hv_guid class_id;
struct device_driver driver;
};
struct vm_device {
struct work_struct probe_failed_work_item;
@ -54,9 +48,9 @@ static inline struct vm_device *device_to_vm_device(struct device *d)
return container_of(d, struct vm_device, device);
}
static inline struct driver_context *driver_to_driver_context(struct device_driver *d)
static inline struct hv_driver *drv_to_hv_drv(struct device_driver *d)
{
return container_of(d, struct driver_context, driver);
return container_of(d, struct hv_driver, driver);
}

14
drivers/staging/hv/vmbus_api.h
View File

@ -25,6 +25,8 @@
#ifndef _VMBUS_API_H_
#define _VMBUS_API_H_
#include <linux/device.h>
#define MAX_PAGE_BUFFER_COUNT 16
#define MAX_MULTIPAGE_BUFFER_COUNT 32 /* 128K */
@ -91,6 +93,18 @@ struct hv_driver {
/* the device type supported by this driver */
struct hv_guid dev_type;
/*
* Device type specific drivers (net, blk etc.)
* need a mechanism to get a pointer to
* device type specific driver structure given
* a pointer to the base hyperv driver structure.
* The current code solves this problem using
* a hack. Support this need explicitly
*/
void *priv;
struct device_driver driver;
int (*dev_add)(struct hv_device *device, void *data);
int (*dev_rm)(struct hv_device *device);
void (*cleanup)(struct hv_driver *driver);

41
drivers/staging/hv/vmbus_drv.c
View File

@ -42,11 +42,6 @@
/* Main vmbus driver data structure */
struct vmbus_driver_context {
/* !! These must be the first 2 fields !! */
/* FIXME, this is a bug */
/* The driver field is not used in here. Instead, the bus field is */
/* used to represent the driver */
struct driver_context drv_ctx;
struct hv_driver drv_obj;
struct bus_type bus;
@ -861,20 +856,14 @@ static int vmbus_uevent(struct device *device, struct kobj_uevent_env *env)
static int vmbus_match(struct device *device, struct device_driver *driver)
{
int match = 0;
struct driver_context *driver_ctx = driver_to_driver_context(driver);
struct hv_driver *drv = drv_to_hv_drv(driver);
struct vm_device *device_ctx = device_to_vm_device(device);
/* We found our driver ? */
if (memcmp(&device_ctx->class_id, &driver_ctx->class_id,
if (memcmp(&device_ctx->class_id, &drv->dev_type,
sizeof(struct hv_guid)) == 0) {
/*
* !! NOTE: The driver_ctx is not a vmbus_drv_ctx. We typecast
* it here to access the struct hv_driver field
*/
struct vmbus_driver_context *vmbus_drv_ctx =
(struct vmbus_driver_context *)driver_ctx;
device_ctx->device_obj.drv = &vmbus_drv_ctx->drv_obj;
device_ctx->device_obj.drv = drv->priv;
DPRINT_INFO(VMBUS_DRV,
"device object (%p) set to driver object (%p)",
&device_ctx->device_obj,
@ -911,15 +900,15 @@ static void vmbus_probe_failed_cb(struct work_struct *context)
static int vmbus_probe(struct device *child_device)
{
int ret = 0;
struct driver_context *driver_ctx =
driver_to_driver_context(child_device->driver);
struct hv_driver *drv =
drv_to_hv_drv(child_device->driver);
struct vm_device *device_ctx =
device_to_vm_device(child_device);
/* Let the specific open-source driver handles the probe if it can */
if (driver_ctx->driver.probe) {
if (drv->driver.probe) {
ret = device_ctx->probe_error =
driver_ctx->driver.probe(child_device);
drv->driver.probe(child_device);
if (ret != 0) {
DPRINT_ERR(VMBUS_DRV, "probe() failed for device %s "
"(%p) on driver %s (%d)...",
@ -944,7 +933,7 @@ static int vmbus_probe(struct device *child_device)
static int vmbus_remove(struct device *child_device)
{
int ret;
struct driver_context *driver_ctx;
struct hv_driver *drv;
/* Special case root bus device */
if (child_device->parent == NULL) {
@ -956,14 +945,14 @@ static int vmbus_remove(struct device *child_device)
}
if (child_device->driver) {
driver_ctx = driver_to_driver_context(child_device->driver);
drv = drv_to_hv_drv(child_device->driver);
/*
* Let the specific open-source driver handles the removal if
* it can
*/
if (driver_ctx->driver.remove) {
ret = driver_ctx->driver.remove(child_device);
if (drv->driver.remove) {
ret = drv->driver.remove(child_device);
} else {
DPRINT_ERR(VMBUS_DRV,
"remove() method not set for driver - %s",
@ -980,7 +969,7 @@ static int vmbus_remove(struct device *child_device)
*/
static void vmbus_shutdown(struct device *child_device)
{
struct driver_context *driver_ctx;
struct hv_driver *drv;
/* Special case root bus device */
if (child_device->parent == NULL) {
@ -995,11 +984,11 @@ static void vmbus_shutdown(struct device *child_device)
if (!child_device->driver)
return;
driver_ctx = driver_to_driver_context(child_device->driver);
drv = drv_to_hv_drv(child_device->driver);
/* Let the specific open-source driver handles the removal if it can */
if (driver_ctx->driver.shutdown)
driver_ctx->driver.shutdown(child_device);
if (drv->driver.shutdown)
drv->driver.shutdown(child_device);
return;
}