On Tue, May 22, 2012 at 8:50 AM, Dave Airlie <airlied@xxxxxxxxx> wrote:
> From: Dave Airlie <airlied@xxxxxxxxxx>
>
> udl can only be used as an output offload so doesn't need to support
> handle->fd direction.
>
> Signed-off-by: Dave Airlie <airlied@xxxxxxxxxx>
I'm not real familiar with udl, but the code seems straight-forward.
Reviewed-by: Alex Deucher <alexander.deucher@xxxxxxx>
> ---
> drivers/gpu/drm/udl/udl_drv.c | 6 +++-
> drivers/gpu/drm/udl/udl_drv.h | 3 ++
> drivers/gpu/drm/udl/udl_fb.c | 9 +++++
> drivers/gpu/drm/udl/udl_gem.c | 75 +++++++++++++++++++++++++++++++++++++++++
> 4 files changed, 92 insertions(+), 1 deletions(-)
>
> diff --git a/drivers/gpu/drm/udl/udl_drv.c b/drivers/gpu/drm/udl/udl_drv.c
> index 82e6921..4d02c46 100644
> --- a/drivers/gpu/drm/udl/udl_drv.c
> +++ b/drivers/gpu/drm/udl/udl_drv.c
> @@ -57,7 +57,7 @@ static const struct file_operations udl_driver_fops = {
> };
>
> static struct drm_driver driver = {
> - .driver_features = DRIVER_MODESET | DRIVER_GEM,
> + .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME,
> .load = udl_driver_load,
> .unload = udl_driver_unload,
>
> @@ -70,6 +70,10 @@ static struct drm_driver driver = {
> .dumb_map_offset = udl_gem_mmap,
> .dumb_destroy = udl_dumb_destroy,
> .fops = &udl_driver_fops,
> +
> + .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
> + .gem_prime_import = udl_gem_prime_import,
> +
> .name = DRIVER_NAME,
> .desc = DRIVER_DESC,
> .date = DRIVER_DATE,
> diff --git a/drivers/gpu/drm/udl/udl_drv.h b/drivers/gpu/drm/udl/udl_drv.h
> index 96820d0..fccd361 100644
> --- a/drivers/gpu/drm/udl/udl_drv.h
> +++ b/drivers/gpu/drm/udl/udl_drv.h
> @@ -66,6 +66,7 @@ struct udl_gem_object {
> struct drm_gem_object base;
> struct page **pages;
> void *vmapping;
> + struct sg_table *sg;
> };
>
> #define to_udl_bo(x) container_of(x, struct udl_gem_object, base)
> @@ -118,6 +119,8 @@ int udl_gem_init_object(struct drm_gem_object *obj);
> void udl_gem_free_object(struct drm_gem_object *gem_obj);
> struct udl_gem_object *udl_gem_alloc_object(struct drm_device *dev,
> size_t size);
> +struct drm_gem_object *udl_gem_prime_import(struct drm_device *dev,
> + struct dma_buf *dma_buf);
>
> int udl_gem_vmap(struct udl_gem_object *obj);
> void udl_gem_vunmap(struct udl_gem_object *obj);
> diff --git a/drivers/gpu/drm/udl/udl_fb.c b/drivers/gpu/drm/udl/udl_fb.c
> index 4d9c3a5..a029ee3 100644
> --- a/drivers/gpu/drm/udl/udl_fb.c
> +++ b/drivers/gpu/drm/udl/udl_fb.c
> @@ -593,11 +593,20 @@ udl_fb_user_fb_create(struct drm_device *dev,
> struct drm_gem_object *obj;
> struct udl_framebuffer *ufb;
> int ret;
> + uint32_t size;
>
> obj = drm_gem_object_lookup(dev, file, mode_cmd->handles[0]);
> if (obj == NULL)
> return ERR_PTR(-ENOENT);
>
> + size = mode_cmd->pitches[0] * mode_cmd->height;
> + size = ALIGN(size, PAGE_SIZE);
> +
> + if (size > obj->size) {
> + DRM_ERROR("object size not sufficient for fb %d %zu %d %d\n", size, obj->size, mode_cmd->pitches[0], mode_cmd->height);
> + return ERR_PTR(-ENOMEM);
> + }
> +
> ufb = kzalloc(sizeof(*ufb), GFP_KERNEL);
> if (ufb == NULL)
> return ERR_PTR(-ENOMEM);
> diff --git a/drivers/gpu/drm/udl/udl_gem.c b/drivers/gpu/drm/udl/udl_gem.c
> index 92f19ef..40efd32 100644
> --- a/drivers/gpu/drm/udl/udl_gem.c
> +++ b/drivers/gpu/drm/udl/udl_gem.c
> @@ -9,6 +9,7 @@
> #include "drmP.h"
> #include "udl_drv.h"
> #include <linux/shmem_fs.h>
> +#include <linux/dma-buf.h>
>
> struct udl_gem_object *udl_gem_alloc_object(struct drm_device *dev,
> size_t size)
> @@ -161,6 +162,12 @@ static void udl_gem_put_pages(struct udl_gem_object *obj)
> int page_count = obj->base.size / PAGE_SIZE;
> int i;
>
> + if (obj->base.import_attach) {
> + drm_free_large(obj->pages);
> + obj->pages = NULL;
> + return;
> + }
> +
> for (i = 0; i < page_count; i++)
> page_cache_release(obj->pages[i]);
>
> @@ -195,6 +202,9 @@ void udl_gem_free_object(struct drm_gem_object *gem_obj)
> {
> struct udl_gem_object *obj = to_udl_bo(gem_obj);
>
> + if (gem_obj->import_attach)
> + drm_prime_gem_destroy(gem_obj, obj->sg);
> +
> if (obj->vmapping)
> udl_gem_vunmap(obj);
>
> @@ -239,3 +249,68 @@ unlock:
> mutex_unlock(&dev->struct_mutex);
> return ret;
> }
> +
> +static int udl_prime_create(struct drm_device *dev,
> + size_t size,
> + struct sg_table *sg,
> + struct udl_gem_object **obj_p)
> +{
> + struct udl_gem_object *obj;
> + int npages;
> + int i;
> + struct scatterlist *iter;
> +
> + npages = size / PAGE_SIZE;
> +
> + *obj_p = NULL;
> + obj = udl_gem_alloc_object(dev, npages * PAGE_SIZE);
> + if (!obj)
> + return -ENOMEM;
> +
> + obj->sg = sg;
> + obj->pages = drm_malloc_ab(npages, sizeof(struct page *));
> + if (obj->pages == NULL) {
> + DRM_ERROR("obj pages is NULL %d\n", npages);
> + return -ENOMEM;
> + }
> +
> + drm_prime_sg_to_page_addr_arrays(sg, obj->pages, NULL, npages);
> +
> + *obj_p = obj;
> + return 0;
> +}
> +
> +struct drm_gem_object *udl_gem_prime_import(struct drm_device *dev,
> + struct dma_buf *dma_buf)
> +{
> + struct dma_buf_attachment *attach;
> + struct sg_table *sg;
> + struct udl_gem_object *uobj;
> + int ret;
> +
> + /* need to attach */
> + attach = dma_buf_attach(dma_buf, dev->dev);
> + if (IS_ERR(attach))
> + return ERR_PTR(PTR_ERR(attach));
> +
> + sg = dma_buf_map_attachment(attach, DMA_BIDIRECTIONAL);
> + if (IS_ERR(sg)) {
> + ret = PTR_ERR(sg);
> + goto fail_detach;
> + }
> +
> + ret = udl_prime_create(dev, dma_buf->size, sg, &uobj);
> + if (ret) {
> + goto fail_unmap;
> + }
> +
> + uobj->base.import_attach = attach;
> +
> + return &uobj->base;
> +
> +fail_unmap:
> + dma_buf_unmap_attachment(attach, sg, DMA_BIDIRECTIONAL);
> +fail_detach:
> + dma_buf_detach(dma_buf, attach);
> + return ERR_PTR(ret);
> +}
> --
> 1.7.6
>
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