Add a generic interface for allocating an object at some specific offset, and convert stolen over. Later we will want to hook this up to different backends.
Signed-off-by: Matthew Auld matthew.auld@intel.com Cc: Thomas Hellström thomas.hellstrom@linux.intel.com --- .../drm/i915/display/intel_plane_initial.c | 4 +- drivers/gpu/drm/i915/gem/i915_gem_create.c | 2 +- drivers/gpu/drm/i915/gem/i915_gem_region.c | 42 ++++++++-- drivers/gpu/drm/i915/gem/i915_gem_region.h | 7 ++ drivers/gpu/drm/i915/gem/i915_gem_shmem.c | 1 + drivers/gpu/drm/i915/gem/i915_gem_stolen.c | 82 ++++++------------- drivers/gpu/drm/i915/gem/i915_gem_stolen.h | 4 - drivers/gpu/drm/i915/gem/i915_gem_ttm.c | 1 + drivers/gpu/drm/i915/gem/i915_gem_ttm.h | 1 + drivers/gpu/drm/i915/gt/intel_rc6.c | 8 +- drivers/gpu/drm/i915/intel_memory_region.h | 1 + drivers/gpu/drm/i915/selftests/mock_region.c | 1 + 12 files changed, 80 insertions(+), 74 deletions(-)
diff --git a/drivers/gpu/drm/i915/display/intel_plane_initial.c b/drivers/gpu/drm/i915/display/intel_plane_initial.c index e207d12286b5..5227e5b35206 100644 --- a/drivers/gpu/drm/i915/display/intel_plane_initial.c +++ b/drivers/gpu/drm/i915/display/intel_plane_initial.c @@ -3,6 +3,7 @@ * Copyright © 2021 Intel Corporation */
+#include "gem/i915_gem_region.h" #include "i915_drv.h" #include "intel_atomic_plane.h" #include "intel_display.h" @@ -69,7 +70,8 @@ initial_plane_vma(struct drm_i915_private *i915, size * 2 > i915->stolen_usable_size) return NULL;
- obj = i915_gem_object_create_stolen_for_preallocated(i915, base, size); + obj = i915_gem_object_create_region_at(i915->mm.stolen_region, + base, size, 0); if (IS_ERR(obj)) return NULL;
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_create.c b/drivers/gpu/drm/i915/gem/i915_gem_create.c index c6eb023d3d86..5802692ea604 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_create.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_create.c @@ -123,7 +123,7 @@ __i915_gem_object_create_user_ext(struct drm_i915_private *i915, u64 size, */ flags = I915_BO_ALLOC_USER;
- ret = mr->ops->init_object(mr, obj, size, 0, flags); + ret = mr->ops->init_object(mr, obj, I915_BO_INVALID_OFFSET, size, 0, flags); if (ret) goto object_free;
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_region.c b/drivers/gpu/drm/i915/gem/i915_gem_region.c index 6cf94469d5a8..460a6924e611 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_region.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_region.c @@ -27,11 +27,12 @@ void i915_gem_object_release_memory_region(struct drm_i915_gem_object *obj) mutex_unlock(&mem->objects.lock); }
-struct drm_i915_gem_object * -i915_gem_object_create_region(struct intel_memory_region *mem, - resource_size_t size, - resource_size_t page_size, - unsigned int flags) +static struct drm_i915_gem_object * +__i915_gem_object_create_region(struct intel_memory_region *mem, + resource_size_t offset, + resource_size_t size, + resource_size_t page_size, + unsigned int flags) { struct drm_i915_gem_object *obj; resource_size_t default_page_size; @@ -83,7 +84,7 @@ i915_gem_object_create_region(struct intel_memory_region *mem, if (default_page_size < mem->min_page_size) flags |= I915_BO_ALLOC_PM_EARLY;
- err = mem->ops->init_object(mem, obj, size, page_size, flags); + err = mem->ops->init_object(mem, obj, offset, size, page_size, flags); if (err) goto err_object_free;
@@ -95,6 +96,35 @@ i915_gem_object_create_region(struct intel_memory_region *mem, return ERR_PTR(err); }
+struct drm_i915_gem_object * +i915_gem_object_create_region(struct intel_memory_region *mem, + resource_size_t size, + resource_size_t page_size, + unsigned int flags) +{ + return __i915_gem_object_create_region(mem, I915_BO_INVALID_OFFSET, + size, page_size, flags); +} + +struct drm_i915_gem_object * +i915_gem_object_create_region_at(struct intel_memory_region *mem, + resource_size_t offset, + resource_size_t size, + unsigned int flags) +{ + GEM_BUG_ON(offset == I915_BO_INVALID_OFFSET); + + if (GEM_WARN_ON(!IS_ALIGNED(size, mem->min_page_size)) || + GEM_WARN_ON(!IS_ALIGNED(offset, mem->min_page_size))) + return ERR_PTR(-EINVAL); + + if (range_overflows(offset, size, resource_size(&mem->region))) + return ERR_PTR(-EINVAL); + + return __i915_gem_object_create_region(mem, offset, size, 0, + flags | I915_BO_ALLOC_CONTIGUOUS); +} + /** * i915_gem_process_region - Iterate over all objects of a region using ops * to process and optionally skip objects diff --git a/drivers/gpu/drm/i915/gem/i915_gem_region.h b/drivers/gpu/drm/i915/gem/i915_gem_region.h index fcaa12d657d4..2dfcc41c0170 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_region.h +++ b/drivers/gpu/drm/i915/gem/i915_gem_region.h @@ -14,6 +14,8 @@ struct sg_table;
struct i915_gem_apply_to_region;
+#define I915_BO_INVALID_OFFSET ((resource_size_t)-1) + /** * struct i915_gem_apply_to_region_ops - ops to use when iterating over all * region objects. @@ -56,6 +58,11 @@ i915_gem_object_create_region(struct intel_memory_region *mem, resource_size_t size, resource_size_t page_size, unsigned int flags); +struct drm_i915_gem_object * +i915_gem_object_create_region_at(struct intel_memory_region *mem, + resource_size_t offset, + resource_size_t size, + unsigned int flags);
int i915_gem_process_region(struct intel_memory_region *mr, struct i915_gem_apply_to_region *apply); diff --git a/drivers/gpu/drm/i915/gem/i915_gem_shmem.c b/drivers/gpu/drm/i915/gem/i915_gem_shmem.c index 3a1c782ed791..9e5faf0bdd4e 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_shmem.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_shmem.c @@ -552,6 +552,7 @@ static int __create_shmem(struct drm_i915_private *i915,
static int shmem_object_init(struct intel_memory_region *mem, struct drm_i915_gem_object *obj, + resource_size_t offset, resource_size_t size, resource_size_t page_size, unsigned int flags) diff --git a/drivers/gpu/drm/i915/gem/i915_gem_stolen.c b/drivers/gpu/drm/i915/gem/i915_gem_stolen.c index c9ad4f8c4eaf..b917ded21028 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_stolen.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_stolen.c @@ -681,6 +681,7 @@ static int __i915_gem_object_create_stolen(struct intel_memory_region *mem,
static int _i915_gem_object_stolen_init(struct intel_memory_region *mem, struct drm_i915_gem_object *obj, + resource_size_t offset, resource_size_t size, resource_size_t page_size, unsigned int flags) @@ -695,12 +696,32 @@ static int _i915_gem_object_stolen_init(struct intel_memory_region *mem, if (size == 0) return -EINVAL;
+ /* + * With discrete devices, where we lack a mappable aperture there is no + * possible way to ever access this memory on the CPU side. + */ + if (mem->type == INTEL_MEMORY_STOLEN_LOCAL && !mem->io_size && + !(flags & I915_BO_ALLOC_GPU_ONLY)) + return -ENOSPC; + stolen = kzalloc(sizeof(*stolen), GFP_KERNEL); if (!stolen) return -ENOMEM;
- ret = i915_gem_stolen_insert_node(i915, stolen, size, - mem->min_page_size); + if (offset != I915_BO_INVALID_OFFSET) { + drm_dbg(&i915->drm, + "creating preallocated stolen object: stolen_offset=%pa, size=%pa\n", + &offset, &size); + + stolen->start = offset; + stolen->size = size; + mutex_lock(&i915->mm.stolen_lock); + ret = drm_mm_reserve_node(&i915->mm.stolen, stolen); + mutex_unlock(&i915->mm.stolen_lock); + } else { + ret = i915_gem_stolen_insert_node(i915, stolen, size, + mem->min_page_size); + } if (ret) goto err_free;
@@ -873,63 +894,6 @@ i915_gem_stolen_smem_setup(struct drm_i915_private *i915, u16 type, return mem; }
-struct drm_i915_gem_object * -i915_gem_object_create_stolen_for_preallocated(struct drm_i915_private *i915, - resource_size_t stolen_offset, - resource_size_t size) -{ - struct intel_memory_region *mem = i915->mm.stolen_region; - struct drm_i915_gem_object *obj; - struct drm_mm_node *stolen; - int ret; - - if (!drm_mm_initialized(&i915->mm.stolen)) - return ERR_PTR(-ENODEV); - - drm_dbg(&i915->drm, - "creating preallocated stolen object: stolen_offset=%pa, size=%pa\n", - &stolen_offset, &size); - - /* KISS and expect everything to be page-aligned */ - if (GEM_WARN_ON(size == 0) || - GEM_WARN_ON(!IS_ALIGNED(size, mem->min_page_size)) || - GEM_WARN_ON(!IS_ALIGNED(stolen_offset, mem->min_page_size))) - return ERR_PTR(-EINVAL); - - stolen = kzalloc(sizeof(*stolen), GFP_KERNEL); - if (!stolen) - return ERR_PTR(-ENOMEM); - - stolen->start = stolen_offset; - stolen->size = size; - mutex_lock(&i915->mm.stolen_lock); - ret = drm_mm_reserve_node(&i915->mm.stolen, stolen); - mutex_unlock(&i915->mm.stolen_lock); - if (ret) - goto err_free; - - obj = i915_gem_object_alloc(); - if (!obj) { - ret = -ENOMEM; - goto err_stolen; - } - - ret = __i915_gem_object_create_stolen(mem, obj, stolen); - if (ret) - goto err_object_free; - - i915_gem_object_set_cache_coherency(obj, I915_CACHE_NONE); - return obj; - -err_object_free: - i915_gem_object_free(obj); -err_stolen: - i915_gem_stolen_remove_node(i915, stolen); -err_free: - kfree(stolen); - return ERR_PTR(ret); -} - bool i915_gem_object_is_stolen(const struct drm_i915_gem_object *obj) { return obj->ops == &i915_gem_object_stolen_ops; diff --git a/drivers/gpu/drm/i915/gem/i915_gem_stolen.h b/drivers/gpu/drm/i915/gem/i915_gem_stolen.h index ccdf7befc571..d5005a39d130 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_stolen.h +++ b/drivers/gpu/drm/i915/gem/i915_gem_stolen.h @@ -31,10 +31,6 @@ i915_gem_stolen_lmem_setup(struct drm_i915_private *i915, u16 type, struct drm_i915_gem_object * i915_gem_object_create_stolen(struct drm_i915_private *dev_priv, resource_size_t size); -struct drm_i915_gem_object * -i915_gem_object_create_stolen_for_preallocated(struct drm_i915_private *dev_priv, - resource_size_t stolen_offset, - resource_size_t size);
bool i915_gem_object_is_stolen(const struct drm_i915_gem_object *obj);
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_ttm.c b/drivers/gpu/drm/i915/gem/i915_gem_ttm.c index 45cc5837ce00..5e543ed867a2 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_ttm.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_ttm.c @@ -1142,6 +1142,7 @@ void i915_ttm_bo_destroy(struct ttm_buffer_object *bo) */ int __i915_gem_ttm_object_init(struct intel_memory_region *mem, struct drm_i915_gem_object *obj, + resource_size_t offset, resource_size_t size, resource_size_t page_size, unsigned int flags) diff --git a/drivers/gpu/drm/i915/gem/i915_gem_ttm.h b/drivers/gpu/drm/i915/gem/i915_gem_ttm.h index 9d698ad00853..73e371aa3850 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_ttm.h +++ b/drivers/gpu/drm/i915/gem/i915_gem_ttm.h @@ -45,6 +45,7 @@ i915_ttm_to_gem(struct ttm_buffer_object *bo)
int __i915_gem_ttm_object_init(struct intel_memory_region *mem, struct drm_i915_gem_object *obj, + resource_size_t offset, resource_size_t size, resource_size_t page_size, unsigned int flags); diff --git a/drivers/gpu/drm/i915/gt/intel_rc6.c b/drivers/gpu/drm/i915/gt/intel_rc6.c index 63db136cbc27..b4770690e794 100644 --- a/drivers/gpu/drm/i915/gt/intel_rc6.c +++ b/drivers/gpu/drm/i915/gt/intel_rc6.c @@ -6,6 +6,7 @@ #include <linux/pm_runtime.h> #include <linux/string_helpers.h>
+#include "gem/i915_gem_region.h" #include "i915_drv.h" #include "i915_reg.h" #include "i915_vgpu.h" @@ -325,9 +326,10 @@ static int vlv_rc6_init(struct intel_rc6 *rc6) resource_size_t pcbr_offset;
pcbr_offset = (pcbr & ~4095) - i915->dsm.start; - pctx = i915_gem_object_create_stolen_for_preallocated(i915, - pcbr_offset, - pctx_size); + pctx = i915_gem_object_create_region_at(i915->mm.stolen_region, + pcbr_offset, + pctx_size, + 0); if (IS_ERR(pctx)) return PTR_ERR(pctx);
diff --git a/drivers/gpu/drm/i915/intel_memory_region.h b/drivers/gpu/drm/i915/intel_memory_region.h index 21dcbd620758..56f266020285 100644 --- a/drivers/gpu/drm/i915/intel_memory_region.h +++ b/drivers/gpu/drm/i915/intel_memory_region.h @@ -54,6 +54,7 @@ struct intel_memory_region_ops {
int (*init_object)(struct intel_memory_region *mem, struct drm_i915_gem_object *obj, + resource_size_t offset, resource_size_t size, resource_size_t page_size, unsigned int flags); diff --git a/drivers/gpu/drm/i915/selftests/mock_region.c b/drivers/gpu/drm/i915/selftests/mock_region.c index f64325491f35..f16c0b7198c7 100644 --- a/drivers/gpu/drm/i915/selftests/mock_region.c +++ b/drivers/gpu/drm/i915/selftests/mock_region.c @@ -57,6 +57,7 @@ static const struct drm_i915_gem_object_ops mock_region_obj_ops = {
static int mock_object_init(struct intel_memory_region *mem, struct drm_i915_gem_object *obj, + resource_size_t offset, resource_size_t size, resource_size_t page_size, unsigned int flags)