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-rw-r--r--drivers/gpu/drm/amd/amdgpu/Kconfig10
-rw-r--r--drivers/gpu/drm/amd/amdgpu/amdgpu.h2
-rw-r--r--drivers/gpu/drm/amd/amdgpu/amdgpu_gart.c35
-rw-r--r--drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c9
4 files changed, 42 insertions, 14 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/Kconfig b/drivers/gpu/drm/amd/amdgpu/Kconfig
index b30fcfa4b1f2..7335c0420c70 100644
--- a/drivers/gpu/drm/amd/amdgpu/Kconfig
+++ b/drivers/gpu/drm/amd/amdgpu/Kconfig
@@ -15,3 +15,13 @@ config DRM_AMDGPU_USERPTR
help
This option selects CONFIG_MMU_NOTIFIER if it isn't already
selected to enabled full userptr support.
+
+config DRM_AMDGPU_GART_DEBUGFS
+ bool "Allow GART access through debugfs"
+ depends on DRM_AMDGPU
+ depends on DEBUG_FS
+ default n
+ help
+ Selecting this option creates a debugfs file to inspect the mapped
+ pages. Uses more memory for housekeeping, enable only for debugging.
+
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
index e6f7bad735cc..b9a6fe9a2a31 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
@@ -611,7 +611,9 @@ struct amdgpu_gart {
unsigned num_gpu_pages;
unsigned num_cpu_pages;
unsigned table_size;
+#ifdef CONFIG_DRM_AMDGPU_GART_DEBUGFS
struct page **pages;
+#endif
bool ready;
const struct amdgpu_gart_funcs *gart_funcs;
};
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gart.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_gart.c
index a13603abed07..921bce2df0b0 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gart.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gart.c
@@ -238,17 +238,17 @@ void amdgpu_gart_unbind(struct amdgpu_device *adev, unsigned offset,
t = offset / AMDGPU_GPU_PAGE_SIZE;
p = t / (PAGE_SIZE / AMDGPU_GPU_PAGE_SIZE);
for (i = 0; i < pages; i++, p++) {
- if (adev->gart.pages[p]) {
- adev->gart.pages[p] = NULL;
- page_base = adev->dummy_page.addr;
- if (!adev->gart.ptr)
- continue;
+#ifdef CONFIG_AMDGPU_GART_DEBUGFS
+ adev->gart.pages[p] = NULL;
+#endif
+ page_base = adev->dummy_page.addr;
+ if (!adev->gart.ptr)
+ continue;
- for (j = 0; j < (PAGE_SIZE / AMDGPU_GPU_PAGE_SIZE); j++, t++) {
- amdgpu_gart_set_pte_pde(adev, adev->gart.ptr,
- t, page_base, flags);
- page_base += AMDGPU_GPU_PAGE_SIZE;
- }
+ for (j = 0; j < (PAGE_SIZE / AMDGPU_GPU_PAGE_SIZE); j++, t++) {
+ amdgpu_gart_set_pte_pde(adev, adev->gart.ptr,
+ t, page_base, flags);
+ page_base += AMDGPU_GPU_PAGE_SIZE;
}
}
mb();
@@ -286,7 +286,9 @@ int amdgpu_gart_bind(struct amdgpu_device *adev, unsigned offset,
p = t / (PAGE_SIZE / AMDGPU_GPU_PAGE_SIZE);
for (i = 0; i < pages; i++, p++) {
+#ifdef CONFIG_AMDGPU_GART_DEBUGFS
adev->gart.pages[p] = pagelist[i];
+#endif
if (adev->gart.ptr) {
page_base = dma_addr[i];
for (j = 0; j < (PAGE_SIZE / AMDGPU_GPU_PAGE_SIZE); j++, t++) {
@@ -312,9 +314,9 @@ int amdgpu_gart_init(struct amdgpu_device *adev)
{
int r;
- if (adev->gart.pages) {
+ if (adev->dummy_page.page)
return 0;
- }
+
/* We need PAGE_SIZE >= AMDGPU_GPU_PAGE_SIZE */
if (PAGE_SIZE < AMDGPU_GPU_PAGE_SIZE) {
DRM_ERROR("Page size is smaller than GPU page size!\n");
@@ -328,12 +330,16 @@ int amdgpu_gart_init(struct amdgpu_device *adev)
adev->gart.num_gpu_pages = adev->mc.gtt_size / AMDGPU_GPU_PAGE_SIZE;
DRM_INFO("GART: num cpu pages %u, num gpu pages %u\n",
adev->gart.num_cpu_pages, adev->gart.num_gpu_pages);
+
+#ifdef CONFIG_AMDGPU_GART_DEBUGFS
/* Allocate pages table */
adev->gart.pages = vzalloc(sizeof(void *) * adev->gart.num_cpu_pages);
if (adev->gart.pages == NULL) {
amdgpu_gart_fini(adev);
return -ENOMEM;
}
+#endif
+
return 0;
}
@@ -346,13 +352,14 @@ int amdgpu_gart_init(struct amdgpu_device *adev)
*/
void amdgpu_gart_fini(struct amdgpu_device *adev)
{
- if (adev->gart.pages && adev->gart.ready) {
+ if (adev->gart.ready) {
/* unbind pages */
amdgpu_gart_unbind(adev, 0, adev->gart.num_cpu_pages);
}
adev->gart.ready = false;
+#ifdef CONFIG_AMDGPU_GART_DEBUGFS
vfree(adev->gart.pages);
adev->gart.pages = NULL;
-
+#endif
amdgpu_dummy_page_fini(adev);
}
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
index 6f3369de232f..7a8bdfedff1d 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
@@ -1216,6 +1216,8 @@ static const struct file_operations amdgpu_ttm_vram_fops = {
.llseek = default_llseek
};
+#ifdef CONFIG_DRM_AMDGPU_GART_DEBUGFS
+
static ssize_t amdgpu_ttm_gtt_read(struct file *f, char __user *buf,
size_t size, loff_t *pos)
{
@@ -1263,6 +1265,8 @@ static const struct file_operations amdgpu_ttm_gtt_fops = {
#endif
+#endif
+
static int amdgpu_ttm_debugfs_init(struct amdgpu_device *adev)
{
#if defined(CONFIG_DEBUG_FS)
@@ -1278,6 +1282,7 @@ static int amdgpu_ttm_debugfs_init(struct amdgpu_device *adev)
i_size_write(ent->d_inode, adev->mc.mc_vram_size);
adev->mman.vram = ent;
+#ifdef CONFIG_DRM_AMDGPU_GART_DEBUGFS
ent = debugfs_create_file("amdgpu_gtt", S_IFREG | S_IRUGO, root,
adev, &amdgpu_ttm_gtt_fops);
if (IS_ERR(ent))
@@ -1285,6 +1290,7 @@ static int amdgpu_ttm_debugfs_init(struct amdgpu_device *adev)
i_size_write(ent->d_inode, adev->mc.gtt_size);
adev->mman.gtt = ent;
+#endif
count = ARRAY_SIZE(amdgpu_ttm_debugfs_list);
#ifdef CONFIG_SWIOTLB
@@ -1306,7 +1312,10 @@ static void amdgpu_ttm_debugfs_fini(struct amdgpu_device *adev)
debugfs_remove(adev->mman.vram);
adev->mman.vram = NULL;
+#ifdef CONFIG_DRM_AMDGPU_GART_DEBUGFS
debugfs_remove(adev->mman.gtt);
adev->mman.gtt = NULL;
#endif
+
+#endif
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-13 23:52:33 +0000