linux/drivers/gpu/drm/drm_agpsupport.c
Tejun Heo 5a0e3ad6af include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files.  percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.

percpu.h -> slab.h dependency is about to be removed.  Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability.  As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.

  http://userweb.kernel.org/~tj/misc/slabh-sweep.py

The script does the followings.

* Scan files for gfp and slab usages and update includes such that
  only the necessary includes are there.  ie. if only gfp is used,
  gfp.h, if slab is used, slab.h.

* When the script inserts a new include, it looks at the include
  blocks and try to put the new include such that its order conforms
  to its surrounding.  It's put in the include block which contains
  core kernel includes, in the same order that the rest are ordered -
  alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
  doesn't seem to be any matching order.

* If the script can't find a place to put a new include (mostly
  because the file doesn't have fitting include block), it prints out
  an error message indicating which .h file needs to be added to the
  file.

The conversion was done in the following steps.

1. The initial automatic conversion of all .c files updated slightly
   over 4000 files, deleting around 700 includes and adding ~480 gfp.h
   and ~3000 slab.h inclusions.  The script emitted errors for ~400
   files.

2. Each error was manually checked.  Some didn't need the inclusion,
   some needed manual addition while adding it to implementation .h or
   embedding .c file was more appropriate for others.  This step added
   inclusions to around 150 files.

3. The script was run again and the output was compared to the edits
   from #2 to make sure no file was left behind.

4. Several build tests were done and a couple of problems were fixed.
   e.g. lib/decompress_*.c used malloc/free() wrappers around slab
   APIs requiring slab.h to be added manually.

5. The script was run on all .h files but without automatically
   editing them as sprinkling gfp.h and slab.h inclusions around .h
   files could easily lead to inclusion dependency hell.  Most gfp.h
   inclusion directives were ignored as stuff from gfp.h was usually
   wildly available and often used in preprocessor macros.  Each
   slab.h inclusion directive was examined and added manually as
   necessary.

6. percpu.h was updated not to include slab.h.

7. Build test were done on the following configurations and failures
   were fixed.  CONFIG_GCOV_KERNEL was turned off for all tests (as my
   distributed build env didn't work with gcov compiles) and a few
   more options had to be turned off depending on archs to make things
   build (like ipr on powerpc/64 which failed due to missing writeq).

   * x86 and x86_64 UP and SMP allmodconfig and a custom test config.
   * powerpc and powerpc64 SMP allmodconfig
   * sparc and sparc64 SMP allmodconfig
   * ia64 SMP allmodconfig
   * s390 SMP allmodconfig
   * alpha SMP allmodconfig
   * um on x86_64 SMP allmodconfig

8. percpu.h modifications were reverted so that it could be applied as
   a separate patch and serve as bisection point.

Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.

Signed-off-by: Tejun Heo <tj@kernel.org>
Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-30 22:02:32 +09:00

507 lines
13 KiB
C

/**
* \file drm_agpsupport.c
* DRM support for AGP/GART backend
*
* \author Rickard E. (Rik) Faith <faith@valinux.com>
* \author Gareth Hughes <gareth@valinux.com>
*/
/*
* Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
* Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*/
#include "drmP.h"
#include <linux/module.h>
#include <linux/slab.h>
#if __OS_HAS_AGP
#include <asm/agp.h>
/**
* Get AGP information.
*
* \param inode device inode.
* \param file_priv DRM file private.
* \param cmd command.
* \param arg pointer to a (output) drm_agp_info structure.
* \return zero on success or a negative number on failure.
*
* Verifies the AGP device has been initialized and acquired and fills in the
* drm_agp_info structure with the information in drm_agp_head::agp_info.
*/
int drm_agp_info(struct drm_device *dev, struct drm_agp_info *info)
{
DRM_AGP_KERN *kern;
if (!dev->agp || !dev->agp->acquired)
return -EINVAL;
kern = &dev->agp->agp_info;
info->agp_version_major = kern->version.major;
info->agp_version_minor = kern->version.minor;
info->mode = kern->mode;
info->aperture_base = kern->aper_base;
info->aperture_size = kern->aper_size * 1024 * 1024;
info->memory_allowed = kern->max_memory << PAGE_SHIFT;
info->memory_used = kern->current_memory << PAGE_SHIFT;
info->id_vendor = kern->device->vendor;
info->id_device = kern->device->device;
return 0;
}
EXPORT_SYMBOL(drm_agp_info);
int drm_agp_info_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
struct drm_agp_info *info = data;
int err;
err = drm_agp_info(dev, info);
if (err)
return err;
return 0;
}
/**
* Acquire the AGP device.
*
* \param dev DRM device that is to acquire AGP.
* \return zero on success or a negative number on failure.
*
* Verifies the AGP device hasn't been acquired before and calls
* \c agp_backend_acquire.
*/
int drm_agp_acquire(struct drm_device * dev)
{
if (!dev->agp)
return -ENODEV;
if (dev->agp->acquired)
return -EBUSY;
if (!(dev->agp->bridge = agp_backend_acquire(dev->pdev)))
return -ENODEV;
dev->agp->acquired = 1;
return 0;
}
EXPORT_SYMBOL(drm_agp_acquire);
/**
* Acquire the AGP device (ioctl).
*
* \param inode device inode.
* \param file_priv DRM file private.
* \param cmd command.
* \param arg user argument.
* \return zero on success or a negative number on failure.
*
* Verifies the AGP device hasn't been acquired before and calls
* \c agp_backend_acquire.
*/
int drm_agp_acquire_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
return drm_agp_acquire((struct drm_device *) file_priv->minor->dev);
}
/**
* Release the AGP device.
*
* \param dev DRM device that is to release AGP.
* \return zero on success or a negative number on failure.
*
* Verifies the AGP device has been acquired and calls \c agp_backend_release.
*/
int drm_agp_release(struct drm_device * dev)
{
if (!dev->agp || !dev->agp->acquired)
return -EINVAL;
agp_backend_release(dev->agp->bridge);
dev->agp->acquired = 0;
return 0;
}
EXPORT_SYMBOL(drm_agp_release);
int drm_agp_release_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
return drm_agp_release(dev);
}
/**
* Enable the AGP bus.
*
* \param dev DRM device that has previously acquired AGP.
* \param mode Requested AGP mode.
* \return zero on success or a negative number on failure.
*
* Verifies the AGP device has been acquired but not enabled, and calls
* \c agp_enable.
*/
int drm_agp_enable(struct drm_device * dev, struct drm_agp_mode mode)
{
if (!dev->agp || !dev->agp->acquired)
return -EINVAL;
dev->agp->mode = mode.mode;
agp_enable(dev->agp->bridge, mode.mode);
dev->agp->enabled = 1;
return 0;
}
EXPORT_SYMBOL(drm_agp_enable);
int drm_agp_enable_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
struct drm_agp_mode *mode = data;
return drm_agp_enable(dev, *mode);
}
/**
* Allocate AGP memory.
*
* \param inode device inode.
* \param file_priv file private pointer.
* \param cmd command.
* \param arg pointer to a drm_agp_buffer structure.
* \return zero on success or a negative number on failure.
*
* Verifies the AGP device is present and has been acquired, allocates the
* memory via alloc_agp() and creates a drm_agp_mem entry for it.
*/
int drm_agp_alloc(struct drm_device *dev, struct drm_agp_buffer *request)
{
struct drm_agp_mem *entry;
DRM_AGP_MEM *memory;
unsigned long pages;
u32 type;
if (!dev->agp || !dev->agp->acquired)
return -EINVAL;
if (!(entry = kmalloc(sizeof(*entry), GFP_KERNEL)))
return -ENOMEM;
memset(entry, 0, sizeof(*entry));
pages = (request->size + PAGE_SIZE - 1) / PAGE_SIZE;
type = (u32) request->type;
if (!(memory = drm_alloc_agp(dev, pages, type))) {
kfree(entry);
return -ENOMEM;
}
entry->handle = (unsigned long)memory->key + 1;
entry->memory = memory;
entry->bound = 0;
entry->pages = pages;
list_add(&entry->head, &dev->agp->memory);
request->handle = entry->handle;
request->physical = memory->physical;
return 0;
}
EXPORT_SYMBOL(drm_agp_alloc);
int drm_agp_alloc_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
struct drm_agp_buffer *request = data;
return drm_agp_alloc(dev, request);
}
/**
* Search for the AGP memory entry associated with a handle.
*
* \param dev DRM device structure.
* \param handle AGP memory handle.
* \return pointer to the drm_agp_mem structure associated with \p handle.
*
* Walks through drm_agp_head::memory until finding a matching handle.
*/
static struct drm_agp_mem *drm_agp_lookup_entry(struct drm_device * dev,
unsigned long handle)
{
struct drm_agp_mem *entry;
list_for_each_entry(entry, &dev->agp->memory, head) {
if (entry->handle == handle)
return entry;
}
return NULL;
}
/**
* Unbind AGP memory from the GATT (ioctl).
*
* \param inode device inode.
* \param file_priv DRM file private.
* \param cmd command.
* \param arg pointer to a drm_agp_binding structure.
* \return zero on success or a negative number on failure.
*
* Verifies the AGP device is present and acquired, looks-up the AGP memory
* entry and passes it to the unbind_agp() function.
*/
int drm_agp_unbind(struct drm_device *dev, struct drm_agp_binding *request)
{
struct drm_agp_mem *entry;
int ret;
if (!dev->agp || !dev->agp->acquired)
return -EINVAL;
if (!(entry = drm_agp_lookup_entry(dev, request->handle)))
return -EINVAL;
if (!entry->bound)
return -EINVAL;
ret = drm_unbind_agp(entry->memory);
if (ret == 0)
entry->bound = 0;
return ret;
}
EXPORT_SYMBOL(drm_agp_unbind);
int drm_agp_unbind_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
struct drm_agp_binding *request = data;
return drm_agp_unbind(dev, request);
}
/**
* Bind AGP memory into the GATT (ioctl)
*
* \param inode device inode.
* \param file_priv DRM file private.
* \param cmd command.
* \param arg pointer to a drm_agp_binding structure.
* \return zero on success or a negative number on failure.
*
* Verifies the AGP device is present and has been acquired and that no memory
* is currently bound into the GATT. Looks-up the AGP memory entry and passes
* it to bind_agp() function.
*/
int drm_agp_bind(struct drm_device *dev, struct drm_agp_binding *request)
{
struct drm_agp_mem *entry;
int retcode;
int page;
if (!dev->agp || !dev->agp->acquired)
return -EINVAL;
if (!(entry = drm_agp_lookup_entry(dev, request->handle)))
return -EINVAL;
if (entry->bound)
return -EINVAL;
page = (request->offset + PAGE_SIZE - 1) / PAGE_SIZE;
if ((retcode = drm_bind_agp(entry->memory, page)))
return retcode;
entry->bound = dev->agp->base + (page << PAGE_SHIFT);
DRM_DEBUG("base = 0x%lx entry->bound = 0x%lx\n",
dev->agp->base, entry->bound);
return 0;
}
EXPORT_SYMBOL(drm_agp_bind);
int drm_agp_bind_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
struct drm_agp_binding *request = data;
return drm_agp_bind(dev, request);
}
/**
* Free AGP memory (ioctl).
*
* \param inode device inode.
* \param file_priv DRM file private.
* \param cmd command.
* \param arg pointer to a drm_agp_buffer structure.
* \return zero on success or a negative number on failure.
*
* Verifies the AGP device is present and has been acquired and looks up the
* AGP memory entry. If the memory it's currently bound, unbind it via
* unbind_agp(). Frees it via free_agp() as well as the entry itself
* and unlinks from the doubly linked list it's inserted in.
*/
int drm_agp_free(struct drm_device *dev, struct drm_agp_buffer *request)
{
struct drm_agp_mem *entry;
if (!dev->agp || !dev->agp->acquired)
return -EINVAL;
if (!(entry = drm_agp_lookup_entry(dev, request->handle)))
return -EINVAL;
if (entry->bound)
drm_unbind_agp(entry->memory);
list_del(&entry->head);
drm_free_agp(entry->memory, entry->pages);
kfree(entry);
return 0;
}
EXPORT_SYMBOL(drm_agp_free);
int drm_agp_free_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
struct drm_agp_buffer *request = data;
return drm_agp_free(dev, request);
}
/**
* Initialize the AGP resources.
*
* \return pointer to a drm_agp_head structure.
*
* Gets the drm_agp_t structure which is made available by the agpgart module
* via the inter_module_* functions. Creates and initializes a drm_agp_head
* structure.
*/
struct drm_agp_head *drm_agp_init(struct drm_device *dev)
{
struct drm_agp_head *head = NULL;
if (!(head = kmalloc(sizeof(*head), GFP_KERNEL)))
return NULL;
memset((void *)head, 0, sizeof(*head));
head->bridge = agp_find_bridge(dev->pdev);
if (!head->bridge) {
if (!(head->bridge = agp_backend_acquire(dev->pdev))) {
kfree(head);
return NULL;
}
agp_copy_info(head->bridge, &head->agp_info);
agp_backend_release(head->bridge);
} else {
agp_copy_info(head->bridge, &head->agp_info);
}
if (head->agp_info.chipset == NOT_SUPPORTED) {
kfree(head);
return NULL;
}
INIT_LIST_HEAD(&head->memory);
head->cant_use_aperture = head->agp_info.cant_use_aperture;
head->page_mask = head->agp_info.page_mask;
head->base = head->agp_info.aper_base;
return head;
}
/** Calls agp_allocate_memory() */
DRM_AGP_MEM *drm_agp_allocate_memory(struct agp_bridge_data * bridge,
size_t pages, u32 type)
{
return agp_allocate_memory(bridge, pages, type);
}
/** Calls agp_free_memory() */
int drm_agp_free_memory(DRM_AGP_MEM * handle)
{
if (!handle)
return 0;
agp_free_memory(handle);
return 1;
}
/** Calls agp_bind_memory() */
int drm_agp_bind_memory(DRM_AGP_MEM * handle, off_t start)
{
if (!handle)
return -EINVAL;
return agp_bind_memory(handle, start);
}
/** Calls agp_unbind_memory() */
int drm_agp_unbind_memory(DRM_AGP_MEM * handle)
{
if (!handle)
return -EINVAL;
return agp_unbind_memory(handle);
}
/**
* Binds a collection of pages into AGP memory at the given offset, returning
* the AGP memory structure containing them.
*
* No reference is held on the pages during this time -- it is up to the
* caller to handle that.
*/
DRM_AGP_MEM *
drm_agp_bind_pages(struct drm_device *dev,
struct page **pages,
unsigned long num_pages,
uint32_t gtt_offset,
u32 type)
{
DRM_AGP_MEM *mem;
int ret, i;
DRM_DEBUG("\n");
mem = drm_agp_allocate_memory(dev->agp->bridge, num_pages,
type);
if (mem == NULL) {
DRM_ERROR("Failed to allocate memory for %ld pages\n",
num_pages);
return NULL;
}
for (i = 0; i < num_pages; i++)
mem->pages[i] = pages[i];
mem->page_count = num_pages;
mem->is_flushed = true;
ret = drm_agp_bind_memory(mem, gtt_offset / PAGE_SIZE);
if (ret != 0) {
DRM_ERROR("Failed to bind AGP memory: %d\n", ret);
agp_free_memory(mem);
return NULL;
}
return mem;
}
EXPORT_SYMBOL(drm_agp_bind_pages);
void drm_agp_chipset_flush(struct drm_device *dev)
{
agp_flush_chipset(dev->agp->bridge);
}
EXPORT_SYMBOL(drm_agp_chipset_flush);
#endif /* __OS_HAS_AGP */