[PATCH 05/13] drm/ttm: allocate resource object instead of embedding it

To improve the handling we want the establish the resource object as base class for the backend allocations.

Signed-off-by: Christian König christian.koenig@amd.com --- drivers/gpu/drm/amd/amdgpu/amdgpu_object.c | 4 +- drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 54 +++++++-------- drivers/gpu/drm/nouveau/nouveau_bo.c | 2 +- drivers/gpu/drm/radeon/radeon_ttm.c | 2 +- drivers/gpu/drm/ttm/ttm_bo.c | 76 +++++++--------------- drivers/gpu/drm/ttm/ttm_bo_util.c | 41 ++++++------ drivers/gpu/drm/ttm/ttm_resource.c | 30 ++++++--- drivers/gpu/drm/vmwgfx/vmwgfx_ttm_buffer.c | 2 +- include/drm/ttm/ttm_bo_api.h | 1 - include/drm/ttm/ttm_bo_driver.h | 10 ++- include/drm/ttm/ttm_resource.h | 4 +- 11 files changed, 101 insertions(+), 125 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c index 6bb9d9d05326..e669a3adac44 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c @@ -362,14 +362,14 @@ int amdgpu_bo_create_kernel_at(struct amdgpu_device *adev, if (cpu_addr) amdgpu_bo_kunmap(*bo_ptr);

- ttm_resource_free(&(*bo_ptr)->tbo, (*bo_ptr)->tbo.resource); + ttm_resource_free(&(*bo_ptr)->tbo, &(*bo_ptr)->tbo.resource);

for (i = 0; i < (*bo_ptr)->placement.num_placement; ++i) { (*bo_ptr)->placements[i].fpfn = offset >> PAGE_SHIFT; (*bo_ptr)->placements[i].lpfn = (offset + size) >> PAGE_SHIFT; } r = ttm_bo_mem_space(&(*bo_ptr)->tbo, &(*bo_ptr)->placement, - (*bo_ptr)->tbo.resource, &ctx); + &(*bo_ptr)->tbo.resource, &ctx); if (r) goto error;

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c index 581523d212d2..3fe2482a40b4 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c @@ -503,7 +503,7 @@ static int amdgpu_bo_move(struct ttm_buffer_object *bo, bool evict, return r;

amdgpu_ttm_backend_unbind(bo->bdev, bo->ttm); - ttm_resource_free(bo, bo->resource); + ttm_resource_free(bo, &bo->resource); ttm_bo_assign_mem(bo, new_mem); goto out; } @@ -1001,9 +1001,9 @@ int amdgpu_ttm_alloc_gart(struct ttm_buffer_object *bo) struct amdgpu_device *adev = amdgpu_ttm_adev(bo->bdev); struct ttm_operation_ctx ctx = { false, false }; struct amdgpu_ttm_tt *gtt = (void *)bo->ttm; - struct ttm_resource tmp; struct ttm_placement placement; struct ttm_place placements; + struct ttm_resource *tmp; uint64_t addr, flags; int r;

@@ -1013,37 +1013,37 @@ int amdgpu_ttm_alloc_gart(struct ttm_buffer_object *bo) addr = amdgpu_gmc_agp_addr(bo); if (addr != AMDGPU_BO_INVALID_OFFSET) { bo->resource->start = addr >> PAGE_SHIFT; - } else { + return 0; + }

- /* allocate GART space */ - placement.num_placement = 1; - placement.placement = &placements; - placement.num_busy_placement = 1; - placement.busy_placement = &placements; - placements.fpfn = 0; - placements.lpfn = adev->gmc.gart_size >> PAGE_SHIFT; - placements.mem_type = TTM_PL_TT; - placements.flags = bo->resource->placement; - - r = ttm_bo_mem_space(bo, &placement, &tmp, &ctx); - if (unlikely(r)) - return r; + /* allocate GART space */ + placement.num_placement = 1; + placement.placement = &placements; + placement.num_busy_placement = 1; + placement.busy_placement = &placements; + placements.fpfn = 0; + placements.lpfn = adev->gmc.gart_size >> PAGE_SHIFT; + placements.mem_type = TTM_PL_TT; + placements.flags = bo->resource->placement;

- /* compute PTE flags for this buffer object */ - flags = amdgpu_ttm_tt_pte_flags(adev, bo->ttm, &tmp); + r = ttm_bo_mem_space(bo, &placement, &tmp, &ctx); + if (unlikely(r)) + return r;

- /* Bind pages */ - gtt->offset = (u64)tmp.start << PAGE_SHIFT; - r = amdgpu_ttm_gart_bind(adev, bo, flags); - if (unlikely(r)) { - ttm_resource_free(bo, &tmp); - return r; - } + /* compute PTE flags for this buffer object */ + flags = amdgpu_ttm_tt_pte_flags(adev, bo->ttm, tmp);

- ttm_resource_free(bo, bo->resource); - ttm_bo_assign_mem(bo, &tmp); + /* Bind pages */ + gtt->offset = (u64)tmp->start << PAGE_SHIFT; + r = amdgpu_ttm_gart_bind(adev, bo, flags); + if (unlikely(r)) { + ttm_resource_free(bo, &tmp); + return r; }

+ ttm_resource_free(bo, &bo->resource); + ttm_bo_assign_mem(bo, tmp); + return 0; }

diff --git a/drivers/gpu/drm/nouveau/nouveau_bo.c b/drivers/gpu/drm/nouveau/nouveau_bo.c index 9eaa3274bd02..be546a2d3e36 100644 --- a/drivers/gpu/drm/nouveau/nouveau_bo.c +++ b/drivers/gpu/drm/nouveau/nouveau_bo.c @@ -1009,7 +1009,7 @@ nouveau_bo_move(struct ttm_buffer_object *bo, bool evict, if (old_reg->mem_type == TTM_PL_TT && new_reg->mem_type == TTM_PL_SYSTEM) { nouveau_ttm_tt_unbind(bo->bdev, bo->ttm); - ttm_resource_free(bo, bo->resource); + ttm_resource_free(bo, &bo->resource); ttm_bo_assign_mem(bo, new_reg); goto out; } diff --git a/drivers/gpu/drm/radeon/radeon_ttm.c b/drivers/gpu/drm/radeon/radeon_ttm.c index 4787bc281281..5191e994bff7 100644 --- a/drivers/gpu/drm/radeon/radeon_ttm.c +++ b/drivers/gpu/drm/radeon/radeon_ttm.c @@ -241,7 +241,7 @@ static int radeon_bo_move(struct ttm_buffer_object *bo, bool evict, if (old_mem->mem_type == TTM_PL_TT && new_mem->mem_type == TTM_PL_SYSTEM) { radeon_ttm_tt_unbind(bo->bdev, bo->ttm); - ttm_resource_free(bo, bo->resource); + ttm_resource_free(bo, &bo->resource); ttm_bo_assign_mem(bo, new_mem); goto out; } diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c index d6cb2b289ba5..8517c823afc0 100644 --- a/drivers/gpu/drm/ttm/ttm_bo.c +++ b/drivers/gpu/drm/ttm/ttm_bo.c @@ -223,7 +223,7 @@ static void ttm_bo_cleanup_memtype_use(struct ttm_buffer_object *bo) bo->bdev->funcs->delete_mem_notify(bo);

ttm_bo_tt_destroy(bo); - ttm_resource_free(bo, bo->resource); + ttm_resource_free(bo, &bo->resource); }

static int ttm_bo_individualize_resv(struct ttm_buffer_object *bo) @@ -489,7 +489,7 @@ static int ttm_bo_evict(struct ttm_buffer_object *bo, struct ttm_operation_ctx *ctx) { struct ttm_device *bdev = bo->bdev; - struct ttm_resource evict_mem; + struct ttm_resource *evict_mem; struct ttm_placement placement; struct ttm_place hop; int ret = 0; @@ -519,7 +519,7 @@ static int ttm_bo_evict(struct ttm_buffer_object *bo, goto out; }

- ret = ttm_bo_handle_move_mem(bo, &evict_mem, true, ctx, &hop); + ret = ttm_bo_handle_move_mem(bo, evict_mem, true, ctx, &hop); if (unlikely(ret)) { WARN(ret == -EMULTIHOP, "Unexpected multihop in eviction - likely driver bug\n"); if (ret != -ERESTARTSYS) @@ -726,14 +726,15 @@ static int ttm_bo_add_move_fence(struct ttm_buffer_object *bo, */ static int ttm_bo_mem_force_space(struct ttm_buffer_object *bo, const struct ttm_place *place, - struct ttm_resource *mem, + struct ttm_resource **mem, struct ttm_operation_ctx *ctx) { struct ttm_device *bdev = bo->bdev; - struct ttm_resource_manager *man = ttm_manager_type(bdev, mem->mem_type); + struct ttm_resource_manager *man; struct ww_acquire_ctx *ticket; int ret;

+ man = ttm_manager_type(bdev, (*mem)->mem_type); ticket = dma_resv_locking_ctx(bo->base.resv); do { ret = ttm_resource_alloc(bo, place, mem); @@ -747,37 +748,7 @@ static int ttm_bo_mem_force_space(struct ttm_buffer_object *bo, return ret; } while (1);

- return ttm_bo_add_move_fence(bo, man, mem, ctx->no_wait_gpu); -} - -/** - * ttm_bo_mem_placement - check if placement is compatible - * @bo: BO to find memory for - * @place: where to search - * @mem: the memory object to fill in - * - * Check if placement is compatible and fill in mem structure. - * Returns -EBUSY if placement won't work or negative error code. - * 0 when placement can be used. - */ -static int ttm_bo_mem_placement(struct ttm_buffer_object *bo, - const struct ttm_place *place, - struct ttm_resource *mem) -{ - struct ttm_device *bdev = bo->bdev; - struct ttm_resource_manager *man; - - man = ttm_manager_type(bdev, place->mem_type); - if (!man || !ttm_resource_manager_used(man)) - return -EBUSY; - - mem->mem_type = place->mem_type; - mem->placement = place->flags; - - spin_lock(&bo->bdev->lru_lock); - ttm_bo_move_to_lru_tail(bo, mem, NULL); - spin_unlock(&bo->bdev->lru_lock); - return 0; + return ttm_bo_add_move_fence(bo, man, *mem, ctx->no_wait_gpu); }

/* @@ -790,7 +761,7 @@ static int ttm_bo_mem_placement(struct ttm_buffer_object *bo, */ int ttm_bo_mem_space(struct ttm_buffer_object *bo, struct ttm_placement *placement, - struct ttm_resource *mem, + struct ttm_resource **mem, struct ttm_operation_ctx *ctx) { struct ttm_device *bdev = bo->bdev; @@ -805,8 +776,8 @@ int ttm_bo_mem_space(struct ttm_buffer_object *bo, const struct ttm_place *place = &placement->placement[i]; struct ttm_resource_manager *man;

- ret = ttm_bo_mem_placement(bo, place, mem); - if (ret) + man = ttm_manager_type(bdev, place->mem_type); + if (!man || !ttm_resource_manager_used(man)) continue;

type_found = true; @@ -816,8 +787,7 @@ int ttm_bo_mem_space(struct ttm_buffer_object *bo, if (unlikely(ret)) goto error;

- man = ttm_manager_type(bdev, mem->mem_type); - ret = ttm_bo_add_move_fence(bo, man, mem, ctx->no_wait_gpu); + ret = ttm_bo_add_move_fence(bo, man, *mem, ctx->no_wait_gpu); if (unlikely(ret)) { ttm_resource_free(bo, mem); if (ret == -EBUSY) @@ -830,9 +800,10 @@ int ttm_bo_mem_space(struct ttm_buffer_object *bo,

for (i = 0; i < placement->num_busy_placement; ++i) { const struct ttm_place *place = &placement->busy_placement[i]; + struct ttm_resource_manager *man;

- ret = ttm_bo_mem_placement(bo, place, mem); - if (ret) + man = ttm_manager_type(bdev, place->mem_type); + if (!man || !ttm_resource_manager_used(man)) continue;

type_found = true; @@ -859,12 +830,12 @@ int ttm_bo_mem_space(struct ttm_buffer_object *bo, EXPORT_SYMBOL(ttm_bo_mem_space);

static int ttm_bo_bounce_temp_buffer(struct ttm_buffer_object *bo, - struct ttm_resource *mem, + struct ttm_resource **mem, struct ttm_operation_ctx *ctx, struct ttm_place *hop) { struct ttm_placement hop_placement; - struct ttm_resource hop_mem; + struct ttm_resource *hop_mem; int ret;

hop_placement.num_placement = hop_placement.num_busy_placement = 1; @@ -875,7 +846,7 @@ static int ttm_bo_bounce_temp_buffer(struct ttm_buffer_object *bo, if (ret) return ret; /* move to the bounce domain */ - ret = ttm_bo_handle_move_mem(bo, &hop_mem, false, ctx, NULL); + ret = ttm_bo_handle_move_mem(bo, hop_mem, false, ctx, NULL); if (ret) { ttm_resource_free(bo, &hop_mem); return ret; @@ -887,14 +858,12 @@ static int ttm_bo_move_buffer(struct ttm_buffer_object *bo, struct ttm_placement *placement, struct ttm_operation_ctx *ctx) { + struct ttm_resource *mem; struct ttm_place hop; - struct ttm_resource mem; int ret;

dma_resv_assert_held(bo->base.resv);

- memset(&hop, 0, sizeof(hop)); - /* * Determine where to move the buffer. * @@ -908,7 +877,7 @@ static int ttm_bo_move_buffer(struct ttm_buffer_object *bo, if (ret) return ret; bounce: - ret = ttm_bo_handle_move_mem(bo, &mem, false, ctx, &hop); + ret = ttm_bo_handle_move_mem(bo, mem, false, ctx, &hop); if (ret == -EMULTIHOP) { ret = ttm_bo_bounce_temp_buffer(bo, &mem, ctx, &hop); if (ret) @@ -1027,8 +996,7 @@ int ttm_bo_init_reserved(struct ttm_device *bdev, bo->bdev = bdev; bo->type = type; bo->page_alignment = page_alignment; - bo->resource = &bo->_mem; - ttm_resource_alloc(bo, &sys_mem, bo->resource); + ttm_resource_alloc(bo, &sys_mem, &bo->resource); bo->moving = NULL; bo->pin_count = 0; bo->sg = sg; @@ -1168,7 +1136,7 @@ int ttm_bo_swapout(struct ttm_buffer_object *bo, struct ttm_operation_ctx *ctx, */ if (bo->resource->mem_type != TTM_PL_SYSTEM) { struct ttm_operation_ctx ctx = { false, false }; - struct ttm_resource evict_mem; + struct ttm_resource *evict_mem; struct ttm_place place, hop;

memset(&place, 0, sizeof(place)); @@ -1180,7 +1148,7 @@ int ttm_bo_swapout(struct ttm_buffer_object *bo, struct ttm_operation_ctx *ctx, if (unlikely(ret)) goto out;

- ret = ttm_bo_handle_move_mem(bo, &evict_mem, true, &ctx, &hop); + ret = ttm_bo_handle_move_mem(bo, evict_mem, true, &ctx, &hop); if (unlikely(ret != 0)) { WARN(ret == -EMULTIHOP, "Unexpected multihop in swaput - likely driver bug.\n"); goto out; diff --git a/drivers/gpu/drm/ttm/ttm_bo_util.c b/drivers/gpu/drm/ttm/ttm_bo_util.c index aedf02a31c70..e417677c791f 100644 --- a/drivers/gpu/drm/ttm/ttm_bo_util.c +++ b/drivers/gpu/drm/ttm/ttm_bo_util.c @@ -176,16 +176,17 @@ int ttm_bo_move_memcpy(struct ttm_buffer_object *bo, struct ttm_operation_ctx *ctx, struct ttm_resource *new_mem) { + struct ttm_resource *old_mem = bo->resource; struct ttm_device *bdev = bo->bdev; - struct ttm_resource_manager *man = ttm_manager_type(bdev, new_mem->mem_type); + struct ttm_resource_manager *man; struct ttm_tt *ttm = bo->ttm; - struct ttm_resource *old_mem = bo->resource; - struct ttm_resource old_copy = *old_mem; void *old_iomap; void *new_iomap; int ret; unsigned long i;

+ man = ttm_manager_type(bdev, new_mem->mem_type); + ret = ttm_bo_wait_ctx(bo, ctx); if (ret) return ret; @@ -201,7 +202,7 @@ int ttm_bo_move_memcpy(struct ttm_buffer_object *bo, * Single TTM move. NOP. */ if (old_iomap == NULL && new_iomap == NULL) - goto out2; + goto out1;

/* * Don't move nonexistent data. Clear destination instead. @@ -210,7 +211,7 @@ int ttm_bo_move_memcpy(struct ttm_buffer_object *bo, (ttm == NULL || (!ttm_tt_is_populated(ttm) && !(ttm->page_flags & TTM_PAGE_FLAG_SWAPPED)))) { memset_io(new_iomap, 0, new_mem->num_pages*PAGE_SIZE); - goto out2; + goto out1; }

/* @@ -235,27 +236,25 @@ int ttm_bo_move_memcpy(struct ttm_buffer_object *bo, ret = ttm_copy_io_page(new_iomap, old_iomap, i); } if (ret) - goto out1; + break; } mb(); -out2: - old_copy = *old_mem; +out1: + ttm_resource_iounmap(bdev, new_mem, new_iomap); +out: + ttm_resource_iounmap(bdev, old_mem, old_iomap);

+ if (ret) { + ttm_resource_free(bo, &new_mem); + return ret; + } + + ttm_resource_free(bo, &bo->resource); ttm_bo_assign_mem(bo, new_mem);

if (!man->use_tt) ttm_bo_tt_destroy(bo);

-out1: - ttm_resource_iounmap(bdev, old_mem, new_iomap); -out: - ttm_resource_iounmap(bdev, &old_copy, old_iomap); - - /* - * On error, keep the mm node! - */ - if (!ret) - ttm_resource_free(bo, &old_copy); return ret; } EXPORT_SYMBOL(ttm_bo_move_memcpy); @@ -566,7 +565,7 @@ static int ttm_bo_wait_free_node(struct ttm_buffer_object *bo,

if (!dst_use_tt) ttm_bo_tt_destroy(bo); - ttm_resource_free(bo, bo->resource); + ttm_resource_free(bo, &bo->resource); return 0; }

@@ -629,7 +628,7 @@ static void ttm_bo_move_pipeline_evict(struct ttm_buffer_object *bo, } spin_unlock(&from->move_lock);

- ttm_resource_free(bo, bo->resource); + ttm_resource_free(bo, &bo->resource);

dma_fence_put(bo->moving); bo->moving = dma_fence_get(fence); @@ -678,7 +677,7 @@ int ttm_bo_pipeline_gutting(struct ttm_buffer_object *bo) if (ret) ttm_bo_wait(bo, false, false);

- ttm_resource_alloc(bo, &sys_mem, bo->resource); + ttm_resource_alloc(bo, &sys_mem, &bo->resource); bo->ttm = NULL;

dma_resv_unlock(&ghost->base._resv); diff --git a/drivers/gpu/drm/ttm/ttm_resource.c b/drivers/gpu/drm/ttm/ttm_resource.c index cec2e6fb1c52..7ebcc3e6818c 100644 --- a/drivers/gpu/drm/ttm/ttm_resource.c +++ b/drivers/gpu/drm/ttm/ttm_resource.c @@ -27,11 +27,14 @@

int ttm_resource_alloc(struct ttm_buffer_object *bo, const struct ttm_place *place, - struct ttm_resource *res) + struct ttm_resource **res_ptr) { struct ttm_resource_manager *man = - ttm_manager_type(bo->bdev, res->mem_type); + ttm_manager_type(bo->bdev, place->mem_type); + struct ttm_resource *res; + int r;

+ res = kmalloc(sizeof(*res), GFP_KERNEL); res->mm_node = NULL; res->start = 0; res->num_pages = PFN_UP(bo->base.size); @@ -41,18 +44,27 @@ int ttm_resource_alloc(struct ttm_buffer_object *bo, res->bus.offset = 0; res->bus.is_iomem = false; res->bus.caching = ttm_cached; + r = man->func->alloc(man, bo, place, res); + if (r) { + kfree(res); + return r; + }

- return man->func->alloc(man, bo, place, res); + *res_ptr = res; + return 0; }

-void ttm_resource_free(struct ttm_buffer_object *bo, struct ttm_resource *res) +void ttm_resource_free(struct ttm_buffer_object *bo, struct ttm_resource **res) { - struct ttm_resource_manager *man = - ttm_manager_type(bo->bdev, res->mem_type); + struct ttm_resource_manager *man;

- man->func->free(man, res); - res->mm_node = NULL; - res->mem_type = TTM_PL_SYSTEM; + if (!*res) + return; + + man = ttm_manager_type(bo->bdev, (*res)->mem_type); + man->func->free(man, *res); + kfree(*res); + *res = NULL; } EXPORT_SYMBOL(ttm_resource_free);

diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_ttm_buffer.c b/drivers/gpu/drm/vmwgfx/vmwgfx_ttm_buffer.c index bb1d453f7ca6..4c34216a9ab8 100644 --- a/drivers/gpu/drm/vmwgfx/vmwgfx_ttm_buffer.c +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_ttm_buffer.c @@ -746,7 +746,7 @@ static int vmw_move(struct ttm_buffer_object *bo, goto fail;

vmw_ttm_unbind(bo->bdev, bo->ttm); - ttm_resource_free(bo, bo->resource); + ttm_resource_free(bo, &bo->resource); ttm_bo_assign_mem(bo, new_mem); return 0; } else { diff --git a/include/drm/ttm/ttm_bo_api.h b/include/drm/ttm/ttm_bo_api.h index 1876a3d6df73..d8bb46228cc7 100644 --- a/include/drm/ttm/ttm_bo_api.h +++ b/include/drm/ttm/ttm_bo_api.h @@ -137,7 +137,6 @@ struct ttm_buffer_object { */

struct ttm_resource *resource; - struct ttm_resource _mem; struct ttm_tt *ttm; bool deleted;

diff --git a/include/drm/ttm/ttm_bo_driver.h b/include/drm/ttm/ttm_bo_driver.h index 1a9ba0b13622..ead0ef7136c8 100644 --- a/include/drm/ttm/ttm_bo_driver.h +++ b/include/drm/ttm/ttm_bo_driver.h @@ -96,7 +96,7 @@ struct ttm_lru_bulk_move { */ int ttm_bo_mem_space(struct ttm_buffer_object *bo, struct ttm_placement *placement, - struct ttm_resource *mem, + struct ttm_resource **mem, struct ttm_operation_ctx *ctx);

/** @@ -188,8 +188,8 @@ ttm_bo_move_to_lru_tail_unlocked(struct ttm_buffer_object *bo) static inline void ttm_bo_assign_mem(struct ttm_buffer_object *bo, struct ttm_resource *new_mem) { - bo->_mem = *new_mem; - new_mem->mm_node = NULL; + WARN_ON(bo->resource); + bo->resource = new_mem; }

/** @@ -202,9 +202,7 @@ static inline void ttm_bo_assign_mem(struct ttm_buffer_object *bo, static inline void ttm_bo_move_null(struct ttm_buffer_object *bo, struct ttm_resource *new_mem) { - struct ttm_resource *old_mem = bo->resource; - - WARN_ON(old_mem->mm_node != NULL); + ttm_resource_free(bo, &bo->resource); ttm_bo_assign_mem(bo, new_mem); }

diff --git a/include/drm/ttm/ttm_resource.h b/include/drm/ttm/ttm_resource.h index 890b9d369519..c17c1a52070d 100644 --- a/include/drm/ttm/ttm_resource.h +++ b/include/drm/ttm/ttm_resource.h @@ -225,8 +225,8 @@ ttm_resource_manager_cleanup(struct ttm_resource_manager *man)

int ttm_resource_alloc(struct ttm_buffer_object *bo, const struct ttm_place *place, - struct ttm_resource *res); -void ttm_resource_free(struct ttm_buffer_object *bo, struct ttm_resource *res); + struct ttm_resource **res); +void ttm_resource_free(struct ttm_buffer_object *bo, struct ttm_resource **res);

void ttm_resource_manager_init(struct ttm_resource_manager *man, unsigned long p_size);