[PATCH 1/5] drm/amdgpu: add AMDGPU_GEM_CREATE_VRAM_LINEAR flag v2

Deucher, Alexander Alexander.Deucher at amd.com
Mon Aug 29 13:47:48 UTC 2016


> -----Original Message-----
> From: amd-gfx [mailto:amd-gfx-bounces at lists.freedesktop.org] On Behalf
> Of Christian König
> Sent: Monday, August 29, 2016 5:20 AM
> To: amd-gfx at lists.freedesktop.org
> Subject: [PATCH 1/5] drm/amdgpu: add
> AMDGPU_GEM_CREATE_VRAM_LINEAR flag v2

I still think this should be renamed AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS or the anti-flag AMDGPU_GEM_CREATE_VRAM_SCATTER_GATHER to avoid confusion with linear in the tiling sense.

Alex

> 
> From: Christian König <christian.koenig at amd.com>
> 
> Add a flag noting that a BO must be created using linear VRAM
> and set this flag on all in kernel users where appropriate.
> 
> Hopefully I haven't missed anything.
> 
> v2: add it in a few more places, fix CPU mapping.
> 
> Signed-off-by: Christian König <christian.koenig at amd.com>
> ---
>  drivers/gpu/drm/amd/amdgpu/amdgpu.h        |  1 +
>  drivers/gpu/drm/amd/amdgpu/amdgpu_cgs.c    |  6 ++++--
>  drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c     | 31
> ++++++++++++++++++++++++++++++
>  drivers/gpu/drm/amd/amdgpu/amdgpu_device.c |  3 ++-
>  drivers/gpu/drm/amd/amdgpu/amdgpu_fb.c     |  3 ++-
>  drivers/gpu/drm/amd/amdgpu/amdgpu_gart.c   |  3 ++-
>  drivers/gpu/drm/amd/amdgpu/amdgpu_object.c | 12 ++++++++++--
>  drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c    |  3 ++-
>  drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.c    | 10 ++++++++--
>  drivers/gpu/drm/amd/amdgpu/amdgpu_vce.c    |  9 +++++++--
>  drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c     |  6 ++++--
>  drivers/gpu/drm/amd/amdgpu/gfx_v7_0.c      |  9 ++++++---
>  drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c      |  6 ++++--
>  include/uapi/drm/amdgpu_drm.h              |  2 ++
>  14 files changed, 85 insertions(+), 19 deletions(-)
> 
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
> b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
> index 545789f..b2d95a9 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
> @@ -2499,6 +2499,7 @@ static inline void amdgpu_acpi_fini(struct
> amdgpu_device *adev) { }
>  struct amdgpu_bo_va_mapping *
>  amdgpu_cs_find_mapping(struct amdgpu_cs_parser *parser,
>  		       uint64_t addr, struct amdgpu_bo **bo);
> +int amdgpu_cs_make_bos_linear(struct amdgpu_cs_parser *parser);
> 
>  #if defined(CONFIG_DRM_AMD_DAL)
>  int amdgpu_dm_display_resume(struct amdgpu_device *adev );
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_cgs.c
> b/drivers/gpu/drm/amd/amdgpu/amdgpu_cgs.c
> index 040993c..c2dfcd3 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_cgs.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_cgs.c
> @@ -146,7 +146,8 @@ static int amdgpu_cgs_alloc_gpu_mem(struct
> cgs_device *cgs_device,
>  	switch(type) {
>  	case CGS_GPU_MEM_TYPE__VISIBLE_CONTIG_FB:
>  	case CGS_GPU_MEM_TYPE__VISIBLE_FB:
> -		flags = AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED;
> +		flags = AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED |
> +			AMDGPU_GEM_CREATE_VRAM_LINEAR;
>  		domain = AMDGPU_GEM_DOMAIN_VRAM;
>  		if (max_offset > adev->mc.real_vram_size)
>  			return -EINVAL;
> @@ -157,7 +158,8 @@ static int amdgpu_cgs_alloc_gpu_mem(struct
> cgs_device *cgs_device,
>  		break;
>  	case CGS_GPU_MEM_TYPE__INVISIBLE_CONTIG_FB:
>  	case CGS_GPU_MEM_TYPE__INVISIBLE_FB:
> -		flags = AMDGPU_GEM_CREATE_NO_CPU_ACCESS;
> +		flags = AMDGPU_GEM_CREATE_NO_CPU_ACCESS |
> +			AMDGPU_GEM_CREATE_VRAM_LINEAR;
>  		domain = AMDGPU_GEM_DOMAIN_VRAM;
>  		if (adev->mc.visible_vram_size < adev->mc.real_vram_size) {
>  			place.fpfn =
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
> b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
> index b0e11ca..108408b 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
> @@ -1097,3 +1097,34 @@ amdgpu_cs_find_mapping(struct
> amdgpu_cs_parser *parser,
> 
>  	return NULL;
>  }
> +
> +/**
> + * amdgpu_cs_make_bos_linear - mark all BOs in this CS as linear
> + *
> + * @parser: command submission parser context
> + *
> + * Helper for UVD/VCE VM emulation, mark all BOs in this CS as linear.
> + */
> +int amdgpu_cs_make_bos_linear(struct amdgpu_cs_parser *parser)
> +{
> +	unsigned i;
> +	int r;
> +
> +	if (!parser->bo_list)
> +		return 0;
> +
> +	for (i = 0; i < parser->bo_list->num_entries; i++) {
> +		struct amdgpu_bo *bo = parser->bo_list->array[i].robj;
> +
> +		if (bo->flags |= AMDGPU_GEM_CREATE_VRAM_LINEAR)
> +			continue;
> +
> +		bo->flags |= AMDGPU_GEM_CREATE_VRAM_LINEAR;
> +		amdgpu_ttm_placement_from_domain(bo, bo-
> >allowed_domains);
> +		r = ttm_bo_validate(&bo->tbo, &bo->placement, false,
> false);
> +		if (unlikely(r))
> +			return r;
> +	}
> +
> +	return 0;
> +}
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> index 1b31a7c..38f5315 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> @@ -256,7 +256,8 @@ static int amdgpu_vram_scratch_init(struct
> amdgpu_device *adev)
>  	if (adev->vram_scratch.robj == NULL) {
>  		r = amdgpu_bo_create(adev, AMDGPU_GPU_PAGE_SIZE,
>  				     PAGE_SIZE, true,
> AMDGPU_GEM_DOMAIN_VRAM,
> -
> AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED,
> +
> AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED |
> +				     AMDGPU_GEM_CREATE_VRAM_LINEAR,
>  				     NULL, NULL, &adev->vram_scratch.robj);
>  		if (r) {
>  			return r;
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_fb.c
> b/drivers/gpu/drm/amd/amdgpu/amdgpu_fb.c
> index e694c99..efa9b79 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_fb.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_fb.c
> @@ -120,7 +120,8 @@ static int amdgpufb_create_pinned_object(struct
> amdgpu_fbdev *rfbdev,
>  	aligned_size = ALIGN(size, PAGE_SIZE);
>  	ret = amdgpu_gem_object_create(adev, aligned_size, 0,
>  				       AMDGPU_GEM_DOMAIN_VRAM,
> -
> AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED,
> +
> AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED |
> +				       AMDGPU_GEM_CREATE_VRAM_LINEAR,
>  				       true, &gobj);
>  	if (ret) {
>  		printk(KERN_ERR "failed to allocate framebuffer (%d)\n",
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gart.c
> b/drivers/gpu/drm/amd/amdgpu/amdgpu_gart.c
> index 0feea34..b5982a9 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gart.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gart.c
> @@ -126,7 +126,8 @@ int amdgpu_gart_table_vram_alloc(struct
> amdgpu_device *adev)
>  	if (adev->gart.robj == NULL) {
>  		r = amdgpu_bo_create(adev, adev->gart.table_size,
>  				     PAGE_SIZE, true,
> AMDGPU_GEM_DOMAIN_VRAM,
> -
> AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED,
> +
> AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED |
> +				     AMDGPU_GEM_CREATE_VRAM_LINEAR,
>  				     NULL, NULL, &adev->gart.robj);
>  		if (r) {
>  			return r;
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
> b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
> index b17734e..6f83909 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
> @@ -247,7 +247,8 @@ int amdgpu_bo_create_kernel(struct amdgpu_device
> *adev,
>  	int r;
> 
>  	r = amdgpu_bo_create(adev, size, align, true, domain,
> -
> AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED,
> +			     AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED
> |
> +			     AMDGPU_GEM_CREATE_VRAM_LINEAR,
>  			     NULL, NULL, bo_ptr);
>  	if (r) {
>  		dev_err(adev->dev, "(%d) failed to allocate kernel bo\n", r);
> @@ -617,6 +618,8 @@ int amdgpu_bo_pin_restricted(struct amdgpu_bo
> *bo, u32 domain,
> 
>  		return 0;
>  	}
> +
> +	bo->flags |= AMDGPU_GEM_CREATE_VRAM_LINEAR;
>  	amdgpu_ttm_placement_from_domain(bo, domain);
>  	for (i = 0; i < bo->placement.num_placement; i++) {
>  		/* force to pin into visible video ram */
> @@ -854,7 +857,9 @@ int amdgpu_bo_fault_reserve_notify(struct
> ttm_buffer_object *bo)
> 
>  	size = bo->mem.num_pages << PAGE_SHIFT;
>  	offset = bo->mem.start << PAGE_SHIFT;
> -	if ((offset + size) <= adev->mc.visible_vram_size)
> +	/* TODO: figure out how to map scattered VRAM to the CPU */
> +	if ((offset + size) <= adev->mc.visible_vram_size &&
> +	    (abo->flags & AMDGPU_GEM_CREATE_VRAM_LINEAR))
>  		return 0;
> 
>  	/* Can't move a pinned BO to visible VRAM */
> @@ -862,6 +867,7 @@ int amdgpu_bo_fault_reserve_notify(struct
> ttm_buffer_object *bo)
>  		return -EINVAL;
> 
>  	/* hurrah the memory is not visible ! */
> +	abo->flags |= AMDGPU_GEM_CREATE_VRAM_LINEAR;
>  	amdgpu_ttm_placement_from_domain(abo,
> AMDGPU_GEM_DOMAIN_VRAM);
>  	lpfn =	adev->mc.visible_vram_size >> PAGE_SHIFT;
>  	for (i = 0; i < abo->placement.num_placement; i++) {
> @@ -920,6 +926,8 @@ u64 amdgpu_bo_gpu_offset(struct amdgpu_bo *bo)
>  	WARN_ON_ONCE(bo->tbo.mem.mem_type == TTM_PL_SYSTEM);
>  	WARN_ON_ONCE(!ww_mutex_is_locked(&bo->tbo.resv->lock) &&
>  		     !bo->pin_count);
> +	WARN_ON_ONCE(bo->tbo.mem.mem_type == TTM_PL_VRAM &&
> +		     !(bo->flags & AMDGPU_GEM_CREATE_VRAM_LINEAR));
> 
>  	return bo->tbo.offset;
>  }
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
> b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
> index e2f6a46..ea480bb 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
> @@ -1024,7 +1024,8 @@ int amdgpu_ttm_init(struct amdgpu_device *adev)
> 
>  	r = amdgpu_bo_create(adev, 256 * 1024, PAGE_SIZE, true,
>  			     AMDGPU_GEM_DOMAIN_VRAM,
> -
> AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED,
> +			     AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED
> |
> +			     AMDGPU_GEM_CREATE_VRAM_LINEAR,
>  			     NULL, NULL, &adev->stollen_vga_memory);
>  	if (r) {
>  		return r;
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.c
> b/drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.c
> index 5888e8a..5f5380c 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.c
> @@ -891,6 +891,10 @@ int amdgpu_uvd_ring_parse_cs(struct
> amdgpu_cs_parser *parser, uint32_t ib_idx)
>  		return -EINVAL;
>  	}
> 
> +	r = amdgpu_cs_make_bos_linear(parser);
> +	if (r)
> +		return r;
> +
>  	ctx.parser = parser;
>  	ctx.buf_sizes = buf_sizes;
>  	ctx.ib_idx = ib_idx;
> @@ -1007,7 +1011,8 @@ int amdgpu_uvd_get_create_msg(struct
> amdgpu_ring *ring, uint32_t handle,
> 
>  	r = amdgpu_bo_create(adev, 1024, PAGE_SIZE, true,
>  			     AMDGPU_GEM_DOMAIN_VRAM,
> -
> AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED,
> +			     AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED
> |
> +			     AMDGPU_GEM_CREATE_VRAM_LINEAR,
>  			     NULL, NULL, &bo);
>  	if (r)
>  		return r;
> @@ -1056,7 +1061,8 @@ int amdgpu_uvd_get_destroy_msg(struct
> amdgpu_ring *ring, uint32_t handle,
> 
>  	r = amdgpu_bo_create(adev, 1024, PAGE_SIZE, true,
>  			     AMDGPU_GEM_DOMAIN_VRAM,
> -
> AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED,
> +			     AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED
> |
> +			     AMDGPU_GEM_CREATE_VRAM_LINEAR,
>  			     NULL, NULL, &bo);
>  	if (r)
>  		return r;
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vce.c
> b/drivers/gpu/drm/amd/amdgpu/amdgpu_vce.c
> index 9b71d6c..bb97a8e 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vce.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vce.c
> @@ -157,7 +157,8 @@ int amdgpu_vce_sw_init(struct amdgpu_device
> *adev, unsigned long size)
> 
>  	r = amdgpu_bo_create(adev, size, PAGE_SIZE, true,
>  			     AMDGPU_GEM_DOMAIN_VRAM,
> -
> AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED,
> +			     AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED
> |
> +			     AMDGPU_GEM_CREATE_VRAM_LINEAR,
>  			     NULL, NULL, &adev->vce.vcpu_bo);
>  	if (r) {
>  		dev_err(adev->dev, "(%d) failed to allocate VCE bo\n", r);
> @@ -634,7 +635,11 @@ int amdgpu_vce_ring_parse_cs(struct
> amdgpu_cs_parser *p, uint32_t ib_idx)
>  	uint32_t allocated = 0;
>  	uint32_t tmp, handle = 0;
>  	uint32_t *size = &tmp;
> -	int i, r = 0, idx = 0;
> +	int i, r, idx = 0;
> +
> +	r = amdgpu_cs_make_bos_linear(p);
> +	if (r)
> +		return r;
> 
>  	while (idx < ib->length_dw) {
>  		uint32_t len = amdgpu_get_ib_value(p, ib_idx, idx);
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
> b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
> index 7660f82..ea1bd67 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
> @@ -1398,7 +1398,8 @@ int amdgpu_vm_bo_map(struct amdgpu_device
> *adev,
>  				     AMDGPU_GPU_PAGE_SIZE, true,
>  				     AMDGPU_GEM_DOMAIN_VRAM,
> 
> AMDGPU_GEM_CREATE_NO_CPU_ACCESS |
> -				     AMDGPU_GEM_CREATE_SHADOW,
> +				     AMDGPU_GEM_CREATE_SHADOW |
> +				     AMDGPU_GEM_CREATE_VRAM_LINEAR,
>  				     NULL, resv, &pt);
>  		if (r)
>  			goto error_free;
> @@ -1598,7 +1599,8 @@ int amdgpu_vm_init(struct amdgpu_device *adev,
> struct amdgpu_vm *vm)
>  	r = amdgpu_bo_create(adev, pd_size, align, true,
>  			     AMDGPU_GEM_DOMAIN_VRAM,
>  			     AMDGPU_GEM_CREATE_NO_CPU_ACCESS |
> -			     AMDGPU_GEM_CREATE_SHADOW,
> +			     AMDGPU_GEM_CREATE_SHADOW |
> +			     AMDGPU_GEM_CREATE_VRAM_LINEAR,
>  			     NULL, NULL, &vm->page_directory);
>  	if (r)
>  		goto error_free_sched_entity;
> diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v7_0.c
> b/drivers/gpu/drm/amd/amdgpu/gfx_v7_0.c
> index f055d49..1517a8c 100644
> --- a/drivers/gpu/drm/amd/amdgpu/gfx_v7_0.c
> +++ b/drivers/gpu/drm/amd/amdgpu/gfx_v7_0.c
> @@ -3213,7 +3213,8 @@ static int gfx_v7_0_rlc_init(struct amdgpu_device
> *adev)
>  		if (adev->gfx.rlc.save_restore_obj == NULL) {
>  			r = amdgpu_bo_create(adev, dws * 4, PAGE_SIZE,
> true,
>  					     AMDGPU_GEM_DOMAIN_VRAM,
> -
> AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED,
> +
> AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED |
> +
> AMDGPU_GEM_CREATE_VRAM_LINEAR,
>  					     NULL, NULL,
>  					     &adev->gfx.rlc.save_restore_obj);
>  			if (r) {
> @@ -3257,7 +3258,8 @@ static int gfx_v7_0_rlc_init(struct amdgpu_device
> *adev)
>  		if (adev->gfx.rlc.clear_state_obj == NULL) {
>  			r = amdgpu_bo_create(adev, dws * 4, PAGE_SIZE,
> true,
>  					     AMDGPU_GEM_DOMAIN_VRAM,
> -
> AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED,
> +
> AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED |
> +
> AMDGPU_GEM_CREATE_VRAM_LINEAR,
>  					     NULL, NULL,
>  					     &adev->gfx.rlc.clear_state_obj);
>  			if (r) {
> @@ -3297,7 +3299,8 @@ static int gfx_v7_0_rlc_init(struct amdgpu_device
> *adev)
>  		if (adev->gfx.rlc.cp_table_obj == NULL) {
>  			r = amdgpu_bo_create(adev, adev-
> >gfx.rlc.cp_table_size, PAGE_SIZE, true,
>  					     AMDGPU_GEM_DOMAIN_VRAM,
> -
> AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED,
> +
> AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED |
> +
> AMDGPU_GEM_CREATE_VRAM_LINEAR,
>  					     NULL, NULL,
>  					     &adev->gfx.rlc.cp_table_obj);
>  			if (r) {
> diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c
> b/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c
> index 6e01392..26e614e 100644
> --- a/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c
> +++ b/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c
> @@ -1273,7 +1273,8 @@ static int gfx_v8_0_rlc_init(struct amdgpu_device
> *adev)
>  		if (adev->gfx.rlc.clear_state_obj == NULL) {
>  			r = amdgpu_bo_create(adev, dws * 4, PAGE_SIZE,
> true,
>  					     AMDGPU_GEM_DOMAIN_VRAM,
> -
> AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED,
> +
> AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED |
> +
> AMDGPU_GEM_CREATE_VRAM_LINEAR,
>  					     NULL, NULL,
>  					     &adev->gfx.rlc.clear_state_obj);
>  			if (r) {
> @@ -1315,7 +1316,8 @@ static int gfx_v8_0_rlc_init(struct amdgpu_device
> *adev)
>  		if (adev->gfx.rlc.cp_table_obj == NULL) {
>  			r = amdgpu_bo_create(adev, adev-
> >gfx.rlc.cp_table_size, PAGE_SIZE, true,
>  					     AMDGPU_GEM_DOMAIN_VRAM,
> -
> AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED,
> +
> AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED |
> +
> AMDGPU_GEM_CREATE_VRAM_LINEAR,
>  					     NULL, NULL,
>  					     &adev->gfx.rlc.cp_table_obj);
>  			if (r) {
> diff --git a/include/uapi/drm/amdgpu_drm.h
> b/include/uapi/drm/amdgpu_drm.h
> index 403b676..2aede6a 100644
> --- a/include/uapi/drm/amdgpu_drm.h
> +++ b/include/uapi/drm/amdgpu_drm.h
> @@ -79,6 +79,8 @@
>  #define AMDGPU_GEM_CREATE_VRAM_CLEARED		(1 << 3)
>  /* Flag that create shadow bo(GTT) while allocating vram bo */
>  #define AMDGPU_GEM_CREATE_SHADOW		(1 << 4)
> +/* Flag that allocating the BO should use linear VRAM */
> +#define AMDGPU_GEM_CREATE_VRAM_LINEAR		(1 << 5)
> 
>  struct drm_amdgpu_gem_create_in  {
>  	/** the requested memory size */
> --
> 2.5.0
> 
> _______________________________________________
> amd-gfx mailing list
> amd-gfx at lists.freedesktop.org
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