Can this fix GTT size issue or not?

Regards,
David Zhou
On 2018年01月12日 14:14, Roger He wrote:
add input parameter for ttm_dma_unpopulate.
when ttm_dma_pool_get_pages or ttm_mem_global_alloc_page fail, don't
call ttm_mem_global_free_page to update global memory count.

Signed-off-by: Roger He <hongbo...@amd.com>
---
  drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c  |  2 +-
  drivers/gpu/drm/nouveau/nouveau_bo.c     |  2 +-
  drivers/gpu/drm/radeon/radeon_ttm.c      |  2 +-
  drivers/gpu/drm/ttm/ttm_page_alloc_dma.c | 19 +++++++++++--------
  drivers/gpu/drm/vmwgfx/vmwgfx_buffer.c   |  2 +-
  include/drm/ttm/ttm_page_alloc.h         |  5 +++--
  6 files changed, 18 insertions(+), 14 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c 
b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
index e4bb435..723ccf1 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
@@ -1046,7 +1046,7 @@ static void amdgpu_ttm_tt_unpopulate(struct ttm_tt *ttm)
#ifdef CONFIG_SWIOTLB
        if (swiotlb_nr_tbl()) {
-               ttm_dma_unpopulate(&gtt->ttm, adev->dev);
+               ttm_dma_unpopulate(&gtt->ttm, adev->dev, true);
                return;
        }
  #endif
diff --git a/drivers/gpu/drm/nouveau/nouveau_bo.c 
b/drivers/gpu/drm/nouveau/nouveau_bo.c
index ce328ed..3f7c30f 100644
--- a/drivers/gpu/drm/nouveau/nouveau_bo.c
+++ b/drivers/gpu/drm/nouveau/nouveau_bo.c
@@ -1632,7 +1632,7 @@ nouveau_ttm_tt_unpopulate(struct ttm_tt *ttm)
#if IS_ENABLED(CONFIG_SWIOTLB) && IS_ENABLED(CONFIG_X86)
        if (swiotlb_nr_tbl()) {
-               ttm_dma_unpopulate((void *)ttm, dev);
+               ttm_dma_unpopulate((void *)ttm, dev, true);
                return;
        }
  #endif
diff --git a/drivers/gpu/drm/radeon/radeon_ttm.c 
b/drivers/gpu/drm/radeon/radeon_ttm.c
index a0a839b..449cc65 100644
--- a/drivers/gpu/drm/radeon/radeon_ttm.c
+++ b/drivers/gpu/drm/radeon/radeon_ttm.c
@@ -789,7 +789,7 @@ static void radeon_ttm_tt_unpopulate(struct ttm_tt *ttm)
#ifdef CONFIG_SWIOTLB
        if (swiotlb_nr_tbl()) {
-               ttm_dma_unpopulate(&gtt->ttm, rdev->dev);
+               ttm_dma_unpopulate(&gtt->ttm, rdev->dev, true);
                return;
        }
  #endif
diff --git a/drivers/gpu/drm/ttm/ttm_page_alloc_dma.c 
b/drivers/gpu/drm/ttm/ttm_page_alloc_dma.c
index c7f01a4..4cda764 100644
--- a/drivers/gpu/drm/ttm/ttm_page_alloc_dma.c
+++ b/drivers/gpu/drm/ttm/ttm_page_alloc_dma.c
@@ -969,7 +969,7 @@ int ttm_dma_populate(struct ttm_dma_tt *ttm_dma, struct 
device *dev,
                ret = ttm_mem_global_alloc_page(mem_glob, ttm->pages[i],
                                                pool->size, ctx);
                if (unlikely(ret != 0)) {
-                       ttm_dma_unpopulate(ttm_dma, dev);
+                       ttm_dma_unpopulate(ttm_dma, dev, false);
                        return -ENOMEM;
                }
@@ -998,14 +998,14 @@ int ttm_dma_populate(struct ttm_dma_tt *ttm_dma, struct device *dev,
        while (num_pages) {
                ret = ttm_dma_pool_get_pages(pool, ttm_dma, i);
                if (ret != 0) {
-                       ttm_dma_unpopulate(ttm_dma, dev);
+                       ttm_dma_unpopulate(ttm_dma, dev, false);
                        return -ENOMEM;
                }
ret = ttm_mem_global_alloc_page(mem_glob, ttm->pages[i],
                                                pool->size, ctx);
                if (unlikely(ret != 0)) {
-                       ttm_dma_unpopulate(ttm_dma, dev);
+                       ttm_dma_unpopulate(ttm_dma, dev, false);
                        return -ENOMEM;
                }
@@ -1016,7 +1016,7 @@ int ttm_dma_populate(struct ttm_dma_tt *ttm_dma, struct device *dev,
        if (unlikely(ttm->page_flags & TTM_PAGE_FLAG_SWAPPED)) {
                ret = ttm_tt_swapin(ttm);
                if (unlikely(ret != 0)) {
-                       ttm_dma_unpopulate(ttm_dma, dev);
+                       ttm_dma_unpopulate(ttm_dma, dev, true);
                        return ret;
                }
        }
@@ -1027,7 +1027,8 @@ int ttm_dma_populate(struct ttm_dma_tt *ttm_dma, struct 
device *dev,
  EXPORT_SYMBOL_GPL(ttm_dma_populate);
/* Put all pages in pages list to correct pool to wait for reuse */
-void ttm_dma_unpopulate(struct ttm_dma_tt *ttm_dma, struct device *dev)
+void ttm_dma_unpopulate(struct ttm_dma_tt *ttm_dma, struct device *dev,
+                       bool update_glob_count)
  {
        struct ttm_tt *ttm = &ttm_dma->ttm;
        struct dma_pool *pool;
@@ -1049,7 +1050,8 @@ void ttm_dma_unpopulate(struct ttm_dma_tt *ttm_dma, 
struct device *dev)
                                continue;
count++;
-                       ttm_mem_global_free_page(ttm->glob->mem_glob,
+                       if (update_glob_count)
+                               ttm_mem_global_free_page(ttm->glob->mem_glob,
                                                 d_page->p, pool->size);
                        ttm_dma_page_put(pool, d_page);
                }
@@ -1094,11 +1096,12 @@ void ttm_dma_unpopulate(struct ttm_dma_tt *ttm_dma, 
struct device *dev)
if (is_cached) {
                list_for_each_entry_safe(d_page, next, &ttm_dma->pages_list, 
page_list) {
-                       ttm_mem_global_free_page(ttm->glob->mem_glob,
+                       if (update_glob_count)
+                               ttm_mem_global_free_page(ttm->glob->mem_glob,
                                                 d_page->p, pool->size);
                        ttm_dma_page_put(pool, d_page);
                }
-       } else {
+       } else if (update_glob_count) {
                for (i = 0; i < count; i++) {
                        ttm_mem_global_free_page(ttm->glob->mem_glob,
                                                 ttm->pages[i], pool->size);
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_buffer.c 
b/drivers/gpu/drm/vmwgfx/vmwgfx_buffer.c
index 22231bc..38df05d 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_buffer.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_buffer.c
@@ -681,7 +681,7 @@ static void vmw_ttm_unpopulate(struct ttm_tt *ttm)
                size_t size =
                        ttm_round_pot(ttm->num_pages * sizeof(dma_addr_t));
- ttm_dma_unpopulate(&vmw_tt->dma_ttm, dev_priv->dev->dev);
+               ttm_dma_unpopulate(&vmw_tt->dma_ttm, dev_priv->dev->dev, true);
                ttm_mem_global_free(glob, size);
        } else
                ttm_pool_unpopulate(ttm);
diff --git a/include/drm/ttm/ttm_page_alloc.h b/include/drm/ttm/ttm_page_alloc.h
index 4d9b019..8518cd5 100644
--- a/include/drm/ttm/ttm_page_alloc.h
+++ b/include/drm/ttm/ttm_page_alloc.h
@@ -92,7 +92,8 @@ int ttm_dma_page_alloc_debugfs(struct seq_file *m, void 
*data);
int ttm_dma_populate(struct ttm_dma_tt *ttm_dma, struct device *dev,
                        struct ttm_operation_ctx *ctx);
-void ttm_dma_unpopulate(struct ttm_dma_tt *ttm_dma, struct device *dev);
+void ttm_dma_unpopulate(struct ttm_dma_tt *ttm_dma, struct device *dev,
+                       bool update_glob_count);
#else
  static inline int ttm_dma_page_alloc_init(struct ttm_mem_global *glob,
@@ -114,7 +115,7 @@ static inline int ttm_dma_populate(struct ttm_dma_tt 
*ttm_dma,
        return -ENOMEM;
  }
  static inline void ttm_dma_unpopulate(struct ttm_dma_tt *ttm_dma,
-                                     struct device *dev)
+               struct device *dev, bool update_glob_count);
  {
  }
  #endif

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