>-----Original Message-----
>From: dri-devel <dri-devel-bounces@xxxxxxxxxxxxxxxxxxxxx> On Behalf Of
>Christian König
>Sent: Thursday, October 1, 2020 7:28 AM
>To: dri-devel@xxxxxxxxxxxxxxxxxxxxx; ray.huang@xxxxxxx;
>airlied@xxxxxxxxx; daniel@xxxxxxxx
>Subject: [PATCH 5/8] drm/ttm: set the tt caching state at creation time
>
>All drivers can determine the tt caching state at creation time,
>no need to do this on the fly during every validation.
Reviewed-by: Michael J. Ruhl <michael.j.ruhl@xxxxxxxxx>
m
>Signed-off-by: Christian König <christian.koenig@xxxxxxx>
>---
> drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 9 ++++++++-
> drivers/gpu/drm/drm_gem_vram_helper.c | 2 +-
> drivers/gpu/drm/nouveau/nouveau_sgdma.c | 13 ++++++++++++-
> drivers/gpu/drm/qxl/qxl_ttm.c | 2 +-
> drivers/gpu/drm/radeon/radeon_ttm.c | 14 +++++++++++++-
> drivers/gpu/drm/ttm/ttm_agp_backend.c | 2 +-
> drivers/gpu/drm/ttm/ttm_tt.c | 16 +++++++++-------
> drivers/gpu/drm/vmwgfx/vmwgfx_ttm_buffer.c | 6 ++++--
> include/drm/ttm/ttm_tt.h | 7 ++++---
> 9 files changed, 53 insertions(+), 18 deletions(-)
>
>diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
>b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
>index 2af24cf39e94..7f41a47e7353 100644
>--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
>+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
>@@ -1292,7 +1292,9 @@ static void amdgpu_ttm_backend_destroy(struct
>ttm_bo_device *bdev,
> static struct ttm_tt *amdgpu_ttm_tt_create(struct ttm_buffer_object *bo,
> uint32_t page_flags)
> {
>+ struct amdgpu_bo *abo = ttm_to_amdgpu_bo(bo);
> struct amdgpu_ttm_tt *gtt;
>+ enum ttm_caching caching;
>
> gtt = kzalloc(sizeof(struct amdgpu_ttm_tt), GFP_KERNEL);
> if (gtt == NULL) {
>@@ -1300,8 +1302,13 @@ static struct ttm_tt *amdgpu_ttm_tt_create(struct
>ttm_buffer_object *bo,
> }
> gtt->gobj = &bo->base;
>
>+ if (abo->flags & AMDGPU_GEM_CREATE_CPU_GTT_USWC)
>+ caching = ttm_write_combined;
>+ else
>+ caching = ttm_cached;
>+
> /* allocate space for the uninitialized page entries */
>- if (ttm_sg_tt_init(>t->ttm, bo, page_flags)) {
>+ if (ttm_sg_tt_init(>t->ttm, bo, page_flags, caching)) {
> kfree(gtt);
> return NULL;
> }
>diff --git a/drivers/gpu/drm/drm_gem_vram_helper.c
>b/drivers/gpu/drm/drm_gem_vram_helper.c
>index 3fe4b326e18e..62235926e077 100644
>--- a/drivers/gpu/drm/drm_gem_vram_helper.c
>+++ b/drivers/gpu/drm/drm_gem_vram_helper.c
>@@ -910,7 +910,7 @@ static struct ttm_tt *bo_driver_ttm_tt_create(struct
>ttm_buffer_object *bo,
> if (!tt)
> return NULL;
>
>- ret = ttm_tt_init(tt, bo, page_flags);
>+ ret = ttm_tt_init(tt, bo, page_flags, ttm_cached);
> if (ret < 0)
> goto err_ttm_tt_init;
>
>diff --git a/drivers/gpu/drm/nouveau/nouveau_sgdma.c
>b/drivers/gpu/drm/nouveau/nouveau_sgdma.c
>index 806d9ec310f5..cd6fdebae795 100644
>--- a/drivers/gpu/drm/nouveau/nouveau_sgdma.c
>+++ b/drivers/gpu/drm/nouveau/nouveau_sgdma.c
>@@ -5,6 +5,7 @@
> #include "nouveau_drv.h"
> #include "nouveau_mem.h"
> #include "nouveau_ttm.h"
>+#include "nouveau_bo.h"
>
> struct nouveau_sgdma_be {
> /* this has to be the first field so populate/unpopulated in
>@@ -67,13 +68,23 @@ nouveau_sgdma_unbind(struct ttm_bo_device
>*bdev, struct ttm_tt *ttm)
> struct ttm_tt *
> nouveau_sgdma_create_ttm(struct ttm_buffer_object *bo, uint32_t
>page_flags)
> {
>+ struct nouveau_drm *drm = nouveau_bdev(bo->bdev);
>+ struct nouveau_bo *nvbo = nouveau_bo(bo);
> struct nouveau_sgdma_be *nvbe;
>+ enum ttm_caching caching;
>+
>+ if (nvbo->force_coherent)
>+ caching = ttm_uncached;
>+ else if (drm->agp.bridge)
>+ caching = ttm_write_combined;
>+ else
>+ caching = ttm_cached;
>
> nvbe = kzalloc(sizeof(*nvbe), GFP_KERNEL);
> if (!nvbe)
> return NULL;
>
>- if (ttm_dma_tt_init(&nvbe->ttm, bo, page_flags)) {
>+ if (ttm_dma_tt_init(&nvbe->ttm, bo, page_flags, caching)) {
> kfree(nvbe);
> return NULL;
> }
>diff --git a/drivers/gpu/drm/qxl/qxl_ttm.c b/drivers/gpu/drm/qxl/qxl_ttm.c
>index 2c35ca4270c6..dcf4ac1480c7 100644
>--- a/drivers/gpu/drm/qxl/qxl_ttm.c
>+++ b/drivers/gpu/drm/qxl/qxl_ttm.c
>@@ -146,7 +146,7 @@ static struct ttm_tt *qxl_ttm_tt_create(struct
>ttm_buffer_object *bo,
> if (gtt == NULL)
> return NULL;
> gtt->qdev = qdev;
>- if (ttm_tt_init(>t->ttm, bo, page_flags)) {
>+ if (ttm_tt_init(>t->ttm, bo, page_flags, ttm_cached)) {
> kfree(gtt);
> return NULL;
> }
>diff --git a/drivers/gpu/drm/radeon/radeon_ttm.c
>b/drivers/gpu/drm/radeon/radeon_ttm.c
>index f01e74113f40..130a7cea35c3 100644
>--- a/drivers/gpu/drm/radeon/radeon_ttm.c
>+++ b/drivers/gpu/drm/radeon/radeon_ttm.c
>@@ -590,6 +590,10 @@ static struct ttm_tt *radeon_ttm_tt_create(struct
>ttm_buffer_object *bo,
> {
> struct radeon_device *rdev;
> struct radeon_ttm_tt *gtt;
>+ enum ttm_caching caching;
>+ struct radeon_bo *rbo;
>+
>+ rbo = container_of(bo, struct radeon_bo, tbo);
>
> rdev = radeon_get_rdev(bo->bdev);
> #if IS_ENABLED(CONFIG_AGP)
>@@ -603,7 +607,15 @@ static struct ttm_tt *radeon_ttm_tt_create(struct
>ttm_buffer_object *bo,
> if (gtt == NULL) {
> return NULL;
> }
>- if (ttm_dma_tt_init(>t->ttm, bo, page_flags)) {
>+
>+ if (rbo->flags & RADEON_GEM_GTT_UC)
>+ caching = ttm_uncached;
>+ else if (rbo->flags & RADEON_GEM_GTT_WC)
>+ caching = ttm_write_combined;
>+ else
>+ caching = ttm_cached;
>+
>+ if (ttm_dma_tt_init(>t->ttm, bo, page_flags, caching)) {
> kfree(gtt);
> return NULL;
> }
>diff --git a/drivers/gpu/drm/ttm/ttm_agp_backend.c
>b/drivers/gpu/drm/ttm/ttm_agp_backend.c
>index a98fd795b752..a723062d37e7 100644
>--- a/drivers/gpu/drm/ttm/ttm_agp_backend.c
>+++ b/drivers/gpu/drm/ttm/ttm_agp_backend.c
>@@ -136,7 +136,7 @@ struct ttm_tt *ttm_agp_tt_create(struct
>ttm_buffer_object *bo,
> agp_be->mem = NULL;
> agp_be->bridge = bridge;
>
>- if (ttm_tt_init(&agp_be->ttm, bo, page_flags)) {
>+ if (ttm_tt_init(&agp_be->ttm, bo, page_flags, ttm_write_combined))
>{
> kfree(agp_be);
> return NULL;
> }
>diff --git a/drivers/gpu/drm/ttm/ttm_tt.c b/drivers/gpu/drm/ttm/ttm_tt.c
>index d4c80e0f3b3b..a465f51df027 100644
>--- a/drivers/gpu/drm/ttm/ttm_tt.c
>+++ b/drivers/gpu/drm/ttm/ttm_tt.c
>@@ -161,7 +161,8 @@ void ttm_tt_destroy(struct ttm_bo_device *bdev,
>struct ttm_tt *ttm)
>
> static void ttm_tt_init_fields(struct ttm_tt *ttm,
> struct ttm_buffer_object *bo,
>- uint32_t page_flags)
>+ uint32_t page_flags,
>+ enum ttm_caching caching)
> {
> ttm->num_pages = bo->num_pages;
> ttm->caching = ttm_cached;
>@@ -169,12 +170,13 @@ static void ttm_tt_init_fields(struct ttm_tt *ttm,
> ttm_tt_set_unpopulated(ttm);
> ttm->swap_storage = NULL;
> ttm->sg = bo->sg;
>+ ttm->caching = caching;
> }
>
> int ttm_tt_init(struct ttm_tt *ttm, struct ttm_buffer_object *bo,
>- uint32_t page_flags)
>+ uint32_t page_flags, enum ttm_caching caching)
> {
>- ttm_tt_init_fields(ttm, bo, page_flags);
>+ ttm_tt_init_fields(ttm, bo, page_flags, caching);
>
> if (ttm_tt_alloc_page_directory(ttm)) {
> pr_err("Failed allocating page table\n");
>@@ -192,11 +194,11 @@ void ttm_tt_fini(struct ttm_tt *ttm)
> EXPORT_SYMBOL(ttm_tt_fini);
>
> int ttm_dma_tt_init(struct ttm_dma_tt *ttm_dma, struct ttm_buffer_object
>*bo,
>- uint32_t page_flags)
>+ uint32_t page_flags, enum ttm_caching caching)
> {
> struct ttm_tt *ttm = &ttm_dma->ttm;
>
>- ttm_tt_init_fields(ttm, bo, page_flags);
>+ ttm_tt_init_fields(ttm, bo, page_flags, caching);
>
> INIT_LIST_HEAD(&ttm_dma->pages_list);
> if (ttm_dma_tt_alloc_page_directory(ttm_dma)) {
>@@ -208,12 +210,12 @@ int ttm_dma_tt_init(struct ttm_dma_tt *ttm_dma,
>struct ttm_buffer_object *bo,
> EXPORT_SYMBOL(ttm_dma_tt_init);
>
> int ttm_sg_tt_init(struct ttm_dma_tt *ttm_dma, struct ttm_buffer_object
>*bo,
>- uint32_t page_flags)
>+ uint32_t page_flags, enum ttm_caching caching)
> {
> struct ttm_tt *ttm = &ttm_dma->ttm;
> int ret;
>
>- ttm_tt_init_fields(ttm, bo, page_flags);
>+ ttm_tt_init_fields(ttm, bo, page_flags, caching);
>
> INIT_LIST_HEAD(&ttm_dma->pages_list);
> if (page_flags & TTM_PAGE_FLAG_SG)
>diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_ttm_buffer.c
>b/drivers/gpu/drm/vmwgfx/vmwgfx_ttm_buffer.c
>index fc68f54df46a..42f957d40c9f 100644
>--- a/drivers/gpu/drm/vmwgfx/vmwgfx_ttm_buffer.c
>+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_ttm_buffer.c
>@@ -647,9 +647,11 @@ static struct ttm_tt *vmw_ttm_tt_create(struct
>ttm_buffer_object *bo,
> vmw_be->mob = NULL;
>
> if (vmw_be->dev_priv->map_mode == vmw_dma_alloc_coherent)
>- ret = ttm_dma_tt_init(&vmw_be->dma_ttm, bo, page_flags);
>+ ret = ttm_dma_tt_init(&vmw_be->dma_ttm, bo, page_flags,
>+ ttm_cached);
> else
>- ret = ttm_tt_init(&vmw_be->dma_ttm.ttm, bo, page_flags);
>+ ret = ttm_tt_init(&vmw_be->dma_ttm.ttm, bo, page_flags,
>+ ttm_cached);
> if (unlikely(ret != 0))
> goto out_no_init;
>
>diff --git a/include/drm/ttm/ttm_tt.h b/include/drm/ttm/ttm_tt.h
>index b90c8c451a54..c39c722d5184 100644
>--- a/include/drm/ttm/ttm_tt.h
>+++ b/include/drm/ttm/ttm_tt.h
>@@ -116,6 +116,7 @@ int ttm_tt_create(struct ttm_buffer_object *bo, bool
>zero_alloc);
> * @ttm: The struct ttm_tt.
> * @bo: The buffer object we create the ttm for.
> * @page_flags: Page flags as identified by TTM_PAGE_FLAG_XX flags.
>+ * @caching: the desired caching state of the pages
> *
> * Create a struct ttm_tt to back data with system memory pages.
> * No pages are actually allocated.
>@@ -123,11 +124,11 @@ int ttm_tt_create(struct ttm_buffer_object *bo,
>bool zero_alloc);
> * NULL: Out of memory.
> */
> int ttm_tt_init(struct ttm_tt *ttm, struct ttm_buffer_object *bo,
>- uint32_t page_flags);
>+ uint32_t page_flags, enum ttm_caching caching);
> int ttm_dma_tt_init(struct ttm_dma_tt *ttm_dma, struct ttm_buffer_object
>*bo,
>- uint32_t page_flags);
>+ uint32_t page_flags, enum ttm_caching caching);
> int ttm_sg_tt_init(struct ttm_dma_tt *ttm_dma, struct ttm_buffer_object
>*bo,
>- uint32_t page_flags);
>+ uint32_t page_flags, enum ttm_caching caching);
>
> /**
> * ttm_tt_fini
>--
>2.17.1
>
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