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drm/vmwgfx: Fix prime import/export 

commit b32233acce upstream.

vmwgfx never supported prime import of external buffers. Furthermore the
driver exposes two different objects to userspace: vmw_surface's and
gem buffers but prime import/export only worked with vmw_surfaces.

Because gem buffers are used through the dumb_buffer interface this meant
that the driver created buffers couldn't have been prime exported or
imported.

Fix prime import/export. Makes IGT's kms_prime pass.

Signed-off-by: Zack Rusin <zack.rusin@broadcom.com>
Fixes: 8afa13a058 ("drm/vmwgfx: Implement DRIVER_GEM")
Cc: <stable@vger.kernel.org> # v6.6+
Reviewed-by: Martin Krastev <martin.krastev@broadcom.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240412025511.78553-4-zack.rusin@broadcom.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Zack Rusin 2024-04-11 22:55:09 -04:00 committed by Greg Kroah-Hartman
parent 7d8ac0942c
commit 2cdb71c975
8 changed files with 117 additions and 22 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

35
drivers/gpu/drm/vmwgfx/vmwgfx_blit.c
View File

@ -456,8 +456,10 @@ int vmw_bo_cpu_blit(struct ttm_buffer_object *dst,
.no_wait_gpu = false
};
u32 j, initial_line = dst_offset / dst_stride;
struct vmw_bo_blit_line_data d;
struct vmw_bo_blit_line_data d = {0};
int ret = 0;
struct page **dst_pages = NULL;
struct page **src_pages = NULL;
/* Buffer objects need to be either pinned or reserved: */
if (!(dst->pin_count))
@ -477,12 +479,35 @@ int vmw_bo_cpu_blit(struct ttm_buffer_object *dst,
return ret;
}
if (!src->ttm->pages && src->ttm->sg) {
src_pages = kvmalloc_array(src->ttm->num_pages,
sizeof(struct page *), GFP_KERNEL);
if (!src_pages)
return -ENOMEM;
ret = drm_prime_sg_to_page_array(src->ttm->sg, src_pages,
src->ttm->num_pages);
if (ret)
goto out;
}
if (!dst->ttm->pages && dst->ttm->sg) {
dst_pages = kvmalloc_array(dst->ttm->num_pages,
sizeof(struct page *), GFP_KERNEL);
if (!dst_pages) {
ret = -ENOMEM;
goto out;
}
ret = drm_prime_sg_to_page_array(dst->ttm->sg, dst_pages,
dst->ttm->num_pages);
if (ret)
goto out;
}
d.mapped_dst = 0;
d.mapped_src = 0;
d.dst_addr = NULL;
d.src_addr = NULL;
d.dst_pages = dst->ttm->pages;
d.src_pages = src->ttm->pages;
d.dst_pages = dst->ttm->pages ? dst->ttm->pages : dst_pages;
d.src_pages = src->ttm->pages ? src->ttm->pages : src_pages;
d.dst_num_pages = PFN_UP(dst->resource->size);
d.src_num_pages = PFN_UP(src->resource->size);
d.dst_prot = ttm_io_prot(dst, dst->resource, PAGE_KERNEL);
@ -504,6 +529,10 @@ out:
kunmap_atomic(d.src_addr);
if (d.dst_addr)
kunmap_atomic(d.dst_addr);
if (src_pages)
kvfree(src_pages);
if (dst_pages)
kvfree(dst_pages);
return ret;
}

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

@ -377,7 +377,8 @@ static int vmw_bo_init(struct vmw_private *dev_priv,
{
struct ttm_operation_ctx ctx = {
.interruptible = params->bo_type != ttm_bo_type_kernel,
.no_wait_gpu = false
.no_wait_gpu = false,
.resv = params->resv,
};
struct ttm_device *bdev = &dev_priv->bdev;
struct drm_device *vdev = &dev_priv->drm;
@ -394,8 +395,8 @@ static int vmw_bo_init(struct vmw_private *dev_priv,
vmw_bo_placement_set(vmw_bo, params->domain, params->busy_domain);
ret = ttm_bo_init_reserved(bdev, &vmw_bo->tbo, params->bo_type,
&vmw_bo->placement, 0, &ctx, NULL,
NULL, destroy);
&vmw_bo->placement, 0, &ctx,
params->sg, params->resv, destroy);
if (unlikely(ret))
return ret;

2
drivers/gpu/drm/vmwgfx/vmwgfx_bo.h
View File

@ -55,6 +55,8 @@ struct vmw_bo_params {
enum ttm_bo_type bo_type;
size_t size;
bool pin;
struct dma_resv *resv;
struct sg_table *sg;
};
/**

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

@ -1628,6 +1628,7 @@ static const struct drm_driver driver = {
.prime_fd_to_handle = vmw_prime_fd_to_handle,
.prime_handle_to_fd = vmw_prime_handle_to_fd,
.gem_prime_import_sg_table = vmw_prime_import_sg_table,
.fops = &vmwgfx_driver_fops,
.name = VMWGFX_DRIVER_NAME,

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

@ -1131,6 +1131,9 @@ extern int vmw_prime_handle_to_fd(struct drm_device *dev,
struct drm_file *file_priv,
uint32_t handle, uint32_t flags,
int *prime_fd);
struct drm_gem_object *vmw_prime_import_sg_table(struct drm_device *dev,
struct dma_buf_attachment *attach,
struct sg_table *table);
/*
* MemoryOBject management - vmwgfx_mob.c

32
drivers/gpu/drm/vmwgfx/vmwgfx_gem.c
View File

@ -149,6 +149,38 @@ out_no_bo:
return ret;
}
struct drm_gem_object *vmw_prime_import_sg_table(struct drm_device *dev,
struct dma_buf_attachment *attach,
struct sg_table *table)
{
int ret;
struct vmw_private *dev_priv = vmw_priv(dev);
struct drm_gem_object *gem = NULL;
struct vmw_bo *vbo;
struct vmw_bo_params params = {
.domain = (dev_priv->has_mob) ? VMW_BO_DOMAIN_SYS : VMW_BO_DOMAIN_VRAM,
.busy_domain = VMW_BO_DOMAIN_SYS,
.bo_type = ttm_bo_type_sg,
.size = attach->dmabuf->size,
.pin = false,
.resv = attach->dmabuf->resv,
.sg = table,
};
dma_resv_lock(params.resv, NULL);
ret = vmw_bo_create(dev_priv, &params, &vbo);
if (ret != 0)
goto out_no_bo;
vbo->tbo.base.funcs = &vmw_gem_object_funcs;
gem = &vbo->tbo.base;
out_no_bo:
dma_resv_unlock(params.resv);
return gem;
}
int vmw_gem_object_create_ioctl(struct drm_device *dev, void *data,
struct drm_file *filp)

15
drivers/gpu/drm/vmwgfx/vmwgfx_prime.c
View File

@ -75,8 +75,12 @@ int vmw_prime_fd_to_handle(struct drm_device *dev,
int fd, u32 *handle)
{
struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
int ret = ttm_prime_fd_to_handle(tfile, fd, handle);
return ttm_prime_fd_to_handle(tfile, fd, handle);
if (ret)
ret = drm_gem_prime_fd_to_handle(dev, file_priv, fd, handle);
return ret;
}
int vmw_prime_handle_to_fd(struct drm_device *dev,
@ -85,5 +89,12 @@ int vmw_prime_handle_to_fd(struct drm_device *dev,
int *prime_fd)
{
struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
return ttm_prime_handle_to_fd(tfile, handle, flags, prime_fd);
int ret;
if (handle > VMWGFX_NUM_MOB)
ret = ttm_prime_handle_to_fd(tfile, handle, flags, prime_fd);
else
ret = drm_gem_prime_handle_to_fd(dev, file_priv, handle, flags, prime_fd);
return ret;
}

44
drivers/gpu/drm/vmwgfx/vmwgfx_ttm_buffer.c
View File

@ -220,13 +220,18 @@ static int vmw_ttm_map_dma(struct vmw_ttm_tt *vmw_tt)
switch (dev_priv->map_mode) {
case vmw_dma_map_bind:
case vmw_dma_map_populate:
vsgt->sgt = &vmw_tt->sgt;
ret = sg_alloc_table_from_pages_segment(
&vmw_tt->sgt, vsgt->pages, vsgt->num_pages, 0,
(unsigned long)vsgt->num_pages << PAGE_SHIFT,
dma_get_max_seg_size(dev_priv->drm.dev), GFP_KERNEL);
if (ret)
goto out_sg_alloc_fail;
if (vmw_tt->dma_ttm.page_flags & TTM_TT_FLAG_EXTERNAL) {
vsgt->sgt = vmw_tt->dma_ttm.sg;
} else {
vsgt->sgt = &vmw_tt->sgt;
ret = sg_alloc_table_from_pages_segment(&vmw_tt->sgt,
vsgt->pages, vsgt->num_pages, 0,
(unsigned long)vsgt->num_pages << PAGE_SHIFT,
dma_get_max_seg_size(dev_priv->drm.dev),
GFP_KERNEL);
if (ret)
goto out_sg_alloc_fail;
}
ret = vmw_ttm_map_for_dma(vmw_tt);
if (unlikely(ret != 0))
@ -241,8 +246,9 @@ static int vmw_ttm_map_dma(struct vmw_ttm_tt *vmw_tt)
return 0;
out_map_fail:
sg_free_table(vmw_tt->vsgt.sgt);
vmw_tt->vsgt.sgt = NULL;
drm_warn(&dev_priv->drm, "VSG table map failed!");
sg_free_table(vsgt->sgt);
vsgt->sgt = NULL;
out_sg_alloc_fail:
return ret;
}
@ -388,15 +394,17 @@ static void vmw_ttm_destroy(struct ttm_device *bdev, struct ttm_tt *ttm)
static int vmw_ttm_populate(struct ttm_device *bdev,
struct ttm_tt *ttm, struct ttm_operation_ctx *ctx)
{
int ret;
bool external = (ttm->page_flags & TTM_TT_FLAG_EXTERNAL) != 0;
/* TODO: maybe completely drop this ? */
if (ttm_tt_is_populated(ttm))
return 0;
ret = ttm_pool_alloc(&bdev->pool, ttm, ctx);
if (external && ttm->sg)
return drm_prime_sg_to_dma_addr_array(ttm->sg,
ttm->dma_address,
ttm->num_pages);
return ret;
return ttm_pool_alloc(&bdev->pool, ttm, ctx);
}
static void vmw_ttm_unpopulate(struct ttm_device *bdev,
@ -404,6 +412,10 @@ static void vmw_ttm_unpopulate(struct ttm_device *bdev,
{
struct vmw_ttm_tt *vmw_tt = container_of(ttm, struct vmw_ttm_tt,
dma_ttm);
bool external = (ttm->page_flags & TTM_TT_FLAG_EXTERNAL) != 0;
if (external)
return;
vmw_ttm_unbind(bdev, ttm);
@ -422,6 +434,7 @@ static struct ttm_tt *vmw_ttm_tt_create(struct ttm_buffer_object *bo,
{
struct vmw_ttm_tt *vmw_be;
int ret;
bool external = bo->type == ttm_bo_type_sg;
vmw_be = kzalloc(sizeof(*vmw_be), GFP_KERNEL);
if (!vmw_be)
@ -430,7 +443,10 @@ static struct ttm_tt *vmw_ttm_tt_create(struct ttm_buffer_object *bo,
vmw_be->dev_priv = vmw_priv_from_ttm(bo->bdev);
vmw_be->mob = NULL;
if (vmw_be->dev_priv->map_mode == vmw_dma_alloc_coherent)
if (external)
page_flags |= TTM_TT_FLAG_EXTERNAL | TTM_TT_FLAG_EXTERNAL_MAPPABLE;
if (vmw_be->dev_priv->map_mode == vmw_dma_alloc_coherent || external)
ret = ttm_sg_tt_init(&vmw_be->dma_ttm, bo, page_flags,
ttm_cached);
else