345 lines
7.0 KiB
C
345 lines
7.0 KiB
C
/**************************************************************************
|
|
*
|
|
* Copyright 2006 Tungsten Graphics, Inc., Bismarck, ND., USA
|
|
* 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, sub license, 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 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 NON-INFRINGEMENT. IN NO EVENT SHALL
|
|
* THE COPYRIGHT HOLDERS, AUTHORS 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.
|
|
*
|
|
* The above copyright notice and this permission notice (including the
|
|
* next paragraph) shall be included in all copies or substantial portions
|
|
* of the Software.
|
|
*
|
|
*
|
|
**************************************************************************/
|
|
|
|
#include "drmP.h"
|
|
|
|
static void drm_ttm_ipi_handler(void *null)
|
|
{
|
|
flush_agp_cache();
|
|
}
|
|
|
|
static void drm_ttm_cache_flush(void)
|
|
{
|
|
if (on_each_cpu(drm_ttm_ipi_handler, NULL, 1, 1) != 0)
|
|
DRM_ERROR("Timed out waiting for drm cache flush.\n");
|
|
}
|
|
|
|
|
|
/*
|
|
* Use kmalloc if possible. Otherwise fall back to vmalloc.
|
|
*/
|
|
|
|
static void ttm_alloc_pages(drm_ttm_t *ttm)
|
|
{
|
|
unsigned long size = ttm->num_pages * sizeof(*ttm->pages);
|
|
ttm->pages = NULL;
|
|
|
|
if (drm_alloc_memctl(size))
|
|
return;
|
|
|
|
if (size <= PAGE_SIZE) {
|
|
ttm->pages = drm_calloc(1, size, DRM_MEM_TTM);
|
|
}
|
|
if (!ttm->pages) {
|
|
ttm->pages = vmalloc_user(size);
|
|
if (ttm->pages)
|
|
ttm->page_flags |= DRM_TTM_PAGE_VMALLOC;
|
|
}
|
|
if (!ttm->pages) {
|
|
drm_free_memctl(size);
|
|
}
|
|
}
|
|
|
|
static void ttm_free_pages(drm_ttm_t *ttm)
|
|
{
|
|
unsigned long size = ttm->num_pages * sizeof(*ttm->pages);
|
|
|
|
if (ttm->page_flags & DRM_TTM_PAGE_VMALLOC) {
|
|
vfree(ttm->pages);
|
|
ttm->page_flags &= ~DRM_TTM_PAGE_VMALLOC;
|
|
} else {
|
|
drm_free(ttm->pages, size, DRM_MEM_TTM);
|
|
}
|
|
drm_free_memctl(size);
|
|
ttm->pages = NULL;
|
|
}
|
|
|
|
|
|
static struct page *drm_ttm_alloc_page(void)
|
|
{
|
|
struct page *page;
|
|
|
|
if (drm_alloc_memctl(PAGE_SIZE)) {
|
|
return NULL;
|
|
}
|
|
page = alloc_page(GFP_KERNEL | __GFP_ZERO | GFP_DMA32);
|
|
if (!page) {
|
|
drm_free_memctl(PAGE_SIZE);
|
|
return NULL;
|
|
}
|
|
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,15))
|
|
SetPageLocked(page);
|
|
#else
|
|
SetPageReserved(page);
|
|
#endif
|
|
return page;
|
|
}
|
|
|
|
|
|
/*
|
|
* Change caching policy for the linear kernel map
|
|
* for range of pages in a ttm.
|
|
*/
|
|
|
|
static int drm_set_caching(drm_ttm_t * ttm, int noncached)
|
|
{
|
|
int i;
|
|
struct page **cur_page;
|
|
int do_tlbflush = 0;
|
|
|
|
if ((ttm->page_flags & DRM_TTM_PAGE_UNCACHED) == noncached)
|
|
return 0;
|
|
|
|
if (noncached)
|
|
drm_ttm_cache_flush();
|
|
|
|
for (i = 0; i < ttm->num_pages; ++i) {
|
|
cur_page = ttm->pages + i;
|
|
if (*cur_page) {
|
|
if (!PageHighMem(*cur_page)) {
|
|
if (noncached) {
|
|
map_page_into_agp(*cur_page);
|
|
} else {
|
|
unmap_page_from_agp(*cur_page);
|
|
}
|
|
do_tlbflush = 1;
|
|
}
|
|
}
|
|
}
|
|
if (do_tlbflush)
|
|
flush_agp_mappings();
|
|
|
|
DRM_FLAG_MASKED(ttm->page_flags, noncached, DRM_TTM_PAGE_UNCACHED);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Free all resources associated with a ttm.
|
|
*/
|
|
|
|
int drm_destroy_ttm(drm_ttm_t * ttm)
|
|
{
|
|
|
|
int i;
|
|
struct page **cur_page;
|
|
drm_ttm_backend_t *be;
|
|
|
|
if (!ttm)
|
|
return 0;
|
|
|
|
be = ttm->be;
|
|
if (be) {
|
|
be->destroy(be);
|
|
ttm->be = NULL;
|
|
}
|
|
|
|
if (ttm->pages) {
|
|
drm_buffer_manager_t *bm = &ttm->dev->bm;
|
|
if (ttm->page_flags & DRM_TTM_PAGE_UNCACHED)
|
|
drm_set_caching(ttm, 0);
|
|
|
|
for (i = 0; i < ttm->num_pages; ++i) {
|
|
cur_page = ttm->pages + i;
|
|
if (*cur_page) {
|
|
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,15))
|
|
unlock_page(*cur_page);
|
|
#else
|
|
ClearPageReserved(*cur_page);
|
|
#endif
|
|
if (page_count(*cur_page) != 1) {
|
|
DRM_ERROR("Erroneous page count. "
|
|
"Leaking pages.\n");
|
|
}
|
|
if (page_mapped(*cur_page)) {
|
|
DRM_ERROR("Erroneous map count. "
|
|
"Leaking page mappings.\n");
|
|
}
|
|
__free_page(*cur_page);
|
|
drm_free_memctl(PAGE_SIZE);
|
|
--bm->cur_pages;
|
|
}
|
|
}
|
|
ttm_free_pages(ttm);
|
|
}
|
|
|
|
drm_ctl_free(ttm, sizeof(*ttm), DRM_MEM_TTM);
|
|
return 0;
|
|
}
|
|
|
|
struct page *drm_ttm_get_page(drm_ttm_t *ttm, int index)
|
|
{
|
|
struct page *p;
|
|
drm_buffer_manager_t *bm = &ttm->dev->bm;
|
|
|
|
p = ttm->pages[index];
|
|
if (!p) {
|
|
p = drm_ttm_alloc_page();
|
|
if (!p)
|
|
return NULL;
|
|
ttm->pages[index] = p;
|
|
++bm->cur_pages;
|
|
}
|
|
return p;
|
|
}
|
|
|
|
|
|
static int drm_ttm_populate(drm_ttm_t * ttm)
|
|
{
|
|
struct page *page;
|
|
unsigned long i;
|
|
drm_ttm_backend_t *be;
|
|
|
|
if (ttm->state != ttm_unpopulated)
|
|
return 0;
|
|
|
|
be = ttm->be;
|
|
for (i = 0; i < ttm->num_pages; ++i) {
|
|
page = drm_ttm_get_page(ttm, i);
|
|
if (!page)
|
|
return -ENOMEM;
|
|
}
|
|
be->populate(be, ttm->num_pages, ttm->pages);
|
|
ttm->state = ttm_unbound;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Initialize a ttm.
|
|
*/
|
|
|
|
drm_ttm_t *drm_ttm_init(struct drm_device *dev, unsigned long size)
|
|
{
|
|
drm_bo_driver_t *bo_driver = dev->driver->bo_driver;
|
|
drm_ttm_t *ttm;
|
|
|
|
if (!bo_driver)
|
|
return NULL;
|
|
|
|
ttm = drm_ctl_calloc(1, sizeof(*ttm), DRM_MEM_TTM);
|
|
if (!ttm)
|
|
return NULL;
|
|
|
|
ttm->dev = dev;
|
|
atomic_set(&ttm->vma_count, 0);
|
|
|
|
ttm->destroy = 0;
|
|
ttm->num_pages = (size + PAGE_SIZE - 1) >> PAGE_SHIFT;
|
|
|
|
ttm->page_flags = 0;
|
|
|
|
/*
|
|
* Account also for AGP module memory usage.
|
|
*/
|
|
|
|
ttm_alloc_pages(ttm);
|
|
if (!ttm->pages) {
|
|
drm_destroy_ttm(ttm);
|
|
DRM_ERROR("Failed allocating page table\n");
|
|
return NULL;
|
|
}
|
|
ttm->be = bo_driver->create_ttm_backend_entry(dev);
|
|
if (!ttm->be) {
|
|
drm_destroy_ttm(ttm);
|
|
DRM_ERROR("Failed creating ttm backend entry\n");
|
|
return NULL;
|
|
}
|
|
ttm->state = ttm_unpopulated;
|
|
return ttm;
|
|
}
|
|
|
|
/*
|
|
* Unbind a ttm region from the aperture.
|
|
*/
|
|
|
|
void drm_ttm_evict(drm_ttm_t * ttm)
|
|
{
|
|
drm_ttm_backend_t *be = ttm->be;
|
|
int ret;
|
|
|
|
if (ttm->state == ttm_bound) {
|
|
ret = be->unbind(be);
|
|
BUG_ON(ret);
|
|
}
|
|
|
|
ttm->state = ttm_evicted;
|
|
}
|
|
|
|
void drm_ttm_fixup_caching(drm_ttm_t * ttm)
|
|
{
|
|
|
|
if (ttm->state == ttm_evicted) {
|
|
drm_ttm_backend_t *be = ttm->be;
|
|
if (be->needs_ub_cache_adjust(be)) {
|
|
drm_set_caching(ttm, 0);
|
|
}
|
|
ttm->state = ttm_unbound;
|
|
}
|
|
}
|
|
|
|
void drm_ttm_unbind(drm_ttm_t * ttm)
|
|
{
|
|
if (ttm->state == ttm_bound)
|
|
drm_ttm_evict(ttm);
|
|
|
|
drm_ttm_fixup_caching(ttm);
|
|
}
|
|
|
|
int drm_bind_ttm(drm_ttm_t * ttm, int cached, unsigned long aper_offset)
|
|
{
|
|
|
|
int ret = 0;
|
|
drm_ttm_backend_t *be;
|
|
|
|
if (!ttm)
|
|
return -EINVAL;
|
|
if (ttm->state == ttm_bound)
|
|
return 0;
|
|
|
|
be = ttm->be;
|
|
|
|
ret = drm_ttm_populate(ttm);
|
|
if (ret)
|
|
return ret;
|
|
|
|
if (ttm->state == ttm_unbound && !cached) {
|
|
drm_set_caching(ttm, DRM_TTM_PAGE_UNCACHED);
|
|
}
|
|
|
|
if ((ret = be->bind(be, aper_offset, cached))) {
|
|
ttm->state = ttm_evicted;
|
|
DRM_ERROR("Couldn't bind backend.\n");
|
|
return ret;
|
|
}
|
|
|
|
ttm->aper_offset = aper_offset;
|
|
ttm->state = ttm_bound;
|
|
|
|
return 0;
|
|
}
|