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drm/vmwgfx: Add new keep_resv BO param

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Adds a new BO param that keeps the reservation locked after creation.
This removes the need to re-reserve the BO after creation which is a
waste of cycles.

This also fixes a bug in vmw_prime_import_sg_table where the imported
reservation is unlocked twice.

Signed-off-by: Ian Forbes <ian.forbes@broadcom.com>
Fixes: b32233acce ("drm/vmwgfx: Fix prime import/export")
Reviewed-by: Zack Rusin <zack.rusin@broadcom.com>
Signed-off-by: Zack Rusin <zack.rusin@broadcom.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250110185335.15301-1-ian.forbes@broadcom.com
This commit is contained in:
Ian Forbes 2025-01-10 12:53:35 -06:00 committed by Zack Rusin
parent 9cdebfa97d
commit b7d4062781
6 changed files with 11 additions and 15 deletions
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3
drivers/gpu/drm/vmwgfx/vmwgfx_bo.c
View File

@ -442,7 +442,8 @@ static int vmw_bo_init(struct vmw_private *dev_priv,
if (params->pin)
ttm_bo_pin(&vmw_bo->tbo);
ttm_bo_unreserve(&vmw_bo->tbo);
if (!params->keep_resv)
ttm_bo_unreserve(&vmw_bo->tbo);
return 0;
}

3
drivers/gpu/drm/vmwgfx/vmwgfx_bo.h
View File

@ -56,8 +56,9 @@ struct vmw_bo_params {
u32 domain;
u32 busy_domain;
enum ttm_bo_type bo_type;
size_t size;
bool pin;
bool keep_resv;
size_t size;
struct dma_resv *resv;
struct sg_table *sg;
};

7
drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
View File

@ -403,7 +403,8 @@ static int vmw_dummy_query_bo_create(struct vmw_private *dev_priv)
.busy_domain = VMW_BO_DOMAIN_SYS,
.bo_type = ttm_bo_type_kernel,
.size = PAGE_SIZE,
.pin = true
.pin = true,
.keep_resv = true,
};
/*
@ -415,10 +416,6 @@ static int vmw_dummy_query_bo_create(struct vmw_private *dev_priv)
if (unlikely(ret != 0))
return ret;
ret = ttm_bo_reserve(&vbo->tbo, false, true, NULL);
BUG_ON(ret != 0);
vmw_bo_pin_reserved(vbo, true);
ret = ttm_bo_kmap(&vbo->tbo, 0, 1, &map);
if (likely(ret == 0)) {
result = ttm_kmap_obj_virtual(&map, &dummy);

1
drivers/gpu/drm/vmwgfx/vmwgfx_gem.c
View File

@ -206,6 +206,7 @@ struct drm_gem_object *vmw_prime_import_sg_table(struct drm_device *dev,
.bo_type = ttm_bo_type_sg,
.size = attach->dmabuf->size,
.pin = false,
.keep_resv = true,
.resv = attach->dmabuf->resv,
.sg = table,

7
drivers/gpu/drm/vmwgfx/vmwgfx_shader.c
View File

@ -896,7 +896,8 @@ int vmw_compat_shader_add(struct vmw_private *dev_priv,
.busy_domain = VMW_BO_DOMAIN_SYS,
.bo_type = ttm_bo_type_device,
.size = size,
.pin = true
.pin = true,
.keep_resv = true,
};
if (!vmw_shader_id_ok(user_key, shader_type))
@ -906,10 +907,6 @@ int vmw_compat_shader_add(struct vmw_private *dev_priv,
if (unlikely(ret != 0))
goto out;
ret = ttm_bo_reserve(&buf->tbo, false, true, NULL);
if (unlikely(ret != 0))
goto no_reserve;
/* Map and copy shader bytecode. */
ret = ttm_bo_kmap(&buf->tbo, 0, PFN_UP(size), &map);
if (unlikely(ret != 0)) {

5
drivers/gpu/drm/vmwgfx/vmwgfx_ttm_buffer.c
View File

@ -572,15 +572,14 @@ int vmw_bo_create_and_populate(struct vmw_private *dev_priv,
.busy_domain = domain,
.bo_type = ttm_bo_type_kernel,
.size = bo_size,
.pin = true
.pin = true,
.keep_resv = true,
};
ret = vmw_bo_create(dev_priv, &bo_params, &vbo);
if (unlikely(ret != 0))
return ret;
ret = ttm_bo_reserve(&vbo->tbo, false, true, NULL);
BUG_ON(ret != 0);
ret = vmw_ttm_populate(vbo->tbo.bdev, vbo->tbo.ttm, &ctx);
if (likely(ret == 0)) {
struct vmw_ttm_tt *vmw_tt =