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drm/vkms: prime import support

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Bring dmabuf sharing through implementing prime_import_sg_table callback.
This will help to validate userspace conformance in prime configurations
without using any actual hardware (e.g. in the cloud).

This enables kms_prime IGT testcase on vkms.

V3:
 - Rodrigo: remove redundant vkms_gem_create_private
V2:
 - Rodrigo: styleguide + return code check

Cc: Rodrigo Siqueira <rodrigosiqueiramelo@gmail.com>
Cc: Haneen Mohammed <hamohammed.sa@gmail.com>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: Simon Ser <simon.ser@intel.com>
Tested-by: Rodrigo Siqueira <rodrigosiqueiramelo@gmail.com>
Reviewed-by: Rodrigo Siqueira <rodrigosiqueiramelo@gmail.com>
Signed-off-by: Oleg Vasilev <oleg.vasilev@intel.com>
Signed-off-by: Oleg Vasilev <omrigann@gmail.com>
Signed-off-by: Rodrigo Siqueira <rodrigosiqueiramelo@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190930155924.21845-1-oleg.vasilev@intel.com
This commit is contained in:
Oleg Vasilev
2019-09-30 18:59:24 +03:00
committed by Rodrigo Siqueira
parent aed6105b28
commit 94e2ec3f7f
3 changed files with 45 additions and 0 deletions
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27
drivers/gpu/drm/vkms/vkms_gem.c
View File

@@ -1,7 +1,9 @@
// SPDX-License-Identifier: GPL-2.0+
#include <linux/dma-buf.h>
#include <linux/shmem_fs.h>
#include <linux/vmalloc.h>
#include <drm/drm_prime.h>
#include "vkms_drv.h"
@@ -218,3 +220,28 @@ out:
mutex_unlock(&vkms_obj->pages_lock);
return ret;
}
struct drm_gem_object *
vkms_prime_import_sg_table(struct drm_device *dev,
struct dma_buf_attachment *attach,
struct sg_table *sg)
{
struct vkms_gem_object *obj;
int npages;
obj = __vkms_gem_create(dev, attach->dmabuf->size);
if (IS_ERR(obj))
return ERR_CAST(obj);
npages = PAGE_ALIGN(attach->dmabuf->size) / PAGE_SIZE;
DRM_DEBUG_PRIME("Importing %d pages\n", npages);
obj->pages = kvmalloc_array(npages, sizeof(struct page *), GFP_KERNEL);
if (!obj->pages) {
vkms_gem_free_object(&obj->gem);
return ERR_PTR(-ENOMEM);
}
drm_prime_sg_to_page_addr_arrays(sg, obj->pages, NULL, npages);
return &obj->gem;
}