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radeon/ttm/PCIe: Use dma_addr if TTM has set it.

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If the TTM layer has used the DMA API to setup pages that are
TTM_PAGE_FLAG_DMA32 (look at patch titled: "ttm: Utilize the dma_addr_t
array for pages that are to in DMA32 pool."), lets use it
when programming the GART in the PCIe type cards.

This patch skips doing the pci_map_page (and pci_unmap_page) if
there is a DMA addresses passed in for that page. If the dma_address
is zero (or DMA_ERROR_CODE), then we continue on with our old
behaviour.

[v2: Fixed an indentation problem, added reviewed-by tag]
[v3: Added Acked-by Jerome]

Acked-by: Jerome Glisse <j.glisse@gmail.com>
Reviewed-by: Thomas Hellstrom <thomas@shipmail.org>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Tested-by: Ian Campbell <ian.campbell@citrix.com>
This commit is contained in:
Konrad Rzeszutek Wilk 2010-12-02 11:04:29 -05:00
parent 27e8b23794
commit c39d35161e
3 changed files with 33 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/gpu/drm/radeon/radeon.h
View File

@ -317,6 +317,7 @@ struct radeon_gart {
union radeon_gart_table table;
struct page **pages;
dma_addr_t *pages_addr;
bool *ttm_alloced;
bool ready;
};
@ -329,7 +330,8 @@ void radeon_gart_fini(struct radeon_device *rdev);
void radeon_gart_unbind(struct radeon_device *rdev, unsigned offset,
int pages);
int radeon_gart_bind(struct radeon_device *rdev, unsigned offset,
int pages, struct page **pagelist);
int pages, struct page **pagelist,
dma_addr_t *dma_addr);
/*

36
drivers/gpu/drm/radeon/radeon_gart.c
View File

@ -149,8 +149,9 @@ void radeon_gart_unbind(struct radeon_device *rdev, unsigned offset,
p = t / (PAGE_SIZE / RADEON_GPU_PAGE_SIZE);
for (i = 0; i < pages; i++, p++) {
if (rdev->gart.pages[p]) {
pci_unmap_page(rdev->pdev, rdev->gart.pages_addr[p],
PAGE_SIZE, PCI_DMA_BIDIRECTIONAL);
if (!rdev->gart.ttm_alloced[p])
pci_unmap_page(rdev->pdev, rdev->gart.pages_addr[p],
PAGE_SIZE, PCI_DMA_BIDIRECTIONAL);
rdev->gart.pages[p] = NULL;
rdev->gart.pages_addr[p] = rdev->dummy_page.addr;
page_base = rdev->gart.pages_addr[p];
@ -165,7 +166,7 @@ void radeon_gart_unbind(struct radeon_device *rdev, unsigned offset,
}
int radeon_gart_bind(struct radeon_device *rdev, unsigned offset,
int pages, struct page **pagelist)
int pages, struct page **pagelist, dma_addr_t *dma_addr)
{
unsigned t;
unsigned p;
@ -180,15 +181,22 @@ int radeon_gart_bind(struct radeon_device *rdev, unsigned offset,
p = t / (PAGE_SIZE / RADEON_GPU_PAGE_SIZE);
for (i = 0; i < pages; i++, p++) {
/* we need to support large memory configurations */
/* assume that unbind have already been call on the range */
rdev->gart.pages_addr[p] = pci_map_page(rdev->pdev, pagelist[i],
/* On TTM path, we only use the DMA API if TTM_PAGE_FLAG_DMA32
* is requested. */
if (dma_addr[i] != DMA_ERROR_CODE) {
rdev->gart.ttm_alloced[p] = true;
rdev->gart.pages_addr[p] = dma_addr[i];
} else {
/* we need to support large memory configurations */
/* assume that unbind have already been call on the range */
rdev->gart.pages_addr[p] = pci_map_page(rdev->pdev, pagelist[i],
0, PAGE_SIZE,
PCI_DMA_BIDIRECTIONAL);
if (pci_dma_mapping_error(rdev->pdev, rdev->gart.pages_addr[p])) {
/* FIXME: failed to map page (return -ENOMEM?) */
radeon_gart_unbind(rdev, offset, pages);
return -ENOMEM;
if (pci_dma_mapping_error(rdev->pdev, rdev->gart.pages_addr[p])) {
/* FIXME: failed to map page (return -ENOMEM?) */
radeon_gart_unbind(rdev, offset, pages);
return -ENOMEM;
}
}
rdev->gart.pages[p] = pagelist[i];
page_base = rdev->gart.pages_addr[p];
@ -251,6 +259,12 @@ int radeon_gart_init(struct radeon_device *rdev)
radeon_gart_fini(rdev);
return -ENOMEM;
}
rdev->gart.ttm_alloced = kzalloc(sizeof(bool) *
rdev->gart.num_cpu_pages, GFP_KERNEL);
if (rdev->gart.ttm_alloced == NULL) {
radeon_gart_fini(rdev);
return -ENOMEM;
}
/* set GART entry to point to the dummy page by default */
for (i = 0; i < rdev->gart.num_cpu_pages; i++) {
rdev->gart.pages_addr[i] = rdev->dummy_page.addr;
@ -267,6 +281,8 @@ void radeon_gart_fini(struct radeon_device *rdev)
rdev->gart.ready = false;
kfree(rdev->gart.pages);
kfree(rdev->gart.pages_addr);
kfree(rdev->gart.ttm_alloced);
rdev->gart.pages = NULL;
rdev->gart.pages_addr = NULL;
rdev->gart.ttm_alloced = NULL;
}

5
drivers/gpu/drm/radeon/radeon_ttm.c
View File

@ -647,6 +647,7 @@ struct radeon_ttm_backend {
unsigned long num_pages;
struct page **pages;
struct page *dummy_read_page;
dma_addr_t *dma_addrs;
bool populated;
bool bound;
unsigned offset;
@ -662,6 +663,7 @@ static int radeon_ttm_backend_populate(struct ttm_backend *backend,
gtt = container_of(backend, struct radeon_ttm_backend, backend);
gtt->pages = pages;
gtt->dma_addrs = dma_addrs;
gtt->num_pages = num_pages;
gtt->dummy_read_page = dummy_read_page;
gtt->populated = true;
@ -674,6 +676,7 @@ static void radeon_ttm_backend_clear(struct ttm_backend *backend)
gtt = container_of(backend, struct radeon_ttm_backend, backend);
gtt->pages = NULL;
gtt->dma_addrs = NULL;
gtt->num_pages = 0;
gtt->dummy_read_page = NULL;
gtt->populated = false;
@ -694,7 +697,7 @@ static int radeon_ttm_backend_bind(struct ttm_backend *backend,
gtt->num_pages, bo_mem, backend);
}
r = radeon_gart_bind(gtt->rdev, gtt->offset,
gtt->num_pages, gtt->pages);
gtt->num_pages, gtt->pages, gtt->dma_addrs);
if (r) {
DRM_ERROR("failed to bind %lu pages at 0x%08X\n",
gtt->num_pages, gtt->offset);