Still A-b :)
On Thu, Aug 08, 2019 at 04:21:54PM -0600, Rob Herring wrote:
> Setting the GPU VA when creating the GEM object doesn't allow for any
> conditional adjustments to the mapping. In preparation to support
> adjusting the mapping and per FD address spaces, restructure the GEM
> object creation to map and unmap the GEM object in the GEM object .open()
> and .close() hooks.
>
> While panfrost_gem_free_object() and panfrost_gem_prime_import_sg_table()
> are not really needed after this commit, keep them as we'll need them in
> subsequent commits.
>
> Cc: Tomeu Vizoso <tomeu.viz...@collabora.com>
> Cc: Boris Brezillon <boris.brezil...@collabora.com>
> Cc: Robin Murphy <robin.mur...@arm.com>
> Reviewed-by: Steven Price <steven.pr...@arm.com>
> Acked-by: Alyssa Rosenzweig <alyssa.rosenzw...@collabora.com>
> Signed-off-by: Rob Herring <r...@kernel.org>
> ---
> Steven, Alyssa, I kept your tags, but please take another look as things
> moved around a bit here.
>
> drivers/gpu/drm/panfrost/panfrost_drv.c | 9 ----
> drivers/gpu/drm/panfrost/panfrost_gem.c | 67 ++++++++++++++-----------
> 2 files changed, 37 insertions(+), 39 deletions(-)
>
> diff --git a/drivers/gpu/drm/panfrost/panfrost_drv.c
> b/drivers/gpu/drm/panfrost/panfrost_drv.c
> index 926d021ee202..2894cfbbce2b 100644
> --- a/drivers/gpu/drm/panfrost/panfrost_drv.c
> +++ b/drivers/gpu/drm/panfrost/panfrost_drv.c
> @@ -78,7 +78,6 @@ static int panfrost_ioctl_get_param(struct drm_device
> *ddev, void *data, struct
> static int panfrost_ioctl_create_bo(struct drm_device *dev, void *data,
> struct drm_file *file)
> {
> - int ret;
> struct drm_gem_shmem_object *shmem;
> struct drm_panfrost_create_bo *args = data;
>
> @@ -90,17 +89,9 @@ static int panfrost_ioctl_create_bo(struct drm_device
> *dev, void *data,
> if (IS_ERR(shmem))
> return PTR_ERR(shmem);
>
> - ret = panfrost_mmu_map(to_panfrost_bo(&shmem->base));
> - if (ret)
> - goto err_free;
> -
> args->offset = to_panfrost_bo(&shmem->base)->node.start << PAGE_SHIFT;
>
> return 0;
> -
> -err_free:
> - drm_gem_handle_delete(file, args->handle);
> - return ret;
> }
>
> /**
> diff --git a/drivers/gpu/drm/panfrost/panfrost_gem.c
> b/drivers/gpu/drm/panfrost/panfrost_gem.c
> index 67d374184340..3933f83ba6b0 100644
> --- a/drivers/gpu/drm/panfrost/panfrost_gem.c
> +++ b/drivers/gpu/drm/panfrost/panfrost_gem.c
> @@ -15,6 +15,39 @@
> * BO.
> */
> static void panfrost_gem_free_object(struct drm_gem_object *obj)
> +{
> + mutex_lock(&pfdev->shrinker_lock);
> + if (!list_empty(&bo->base.madv_list))
> + list_del(&bo->base.madv_list);
> + mutex_unlock(&pfdev->shrinker_lock);
> +
> + drm_gem_shmem_free_object(obj);
> +}
> +
> +static int panfrost_gem_open(struct drm_gem_object *obj, struct drm_file
> *file_priv)
> +{
> + int ret;
> + size_t size = obj->size;
> + u64 align = size >= SZ_2M ? SZ_2M >> PAGE_SHIFT : 0;
> + struct panfrost_gem_object *bo = to_panfrost_bo(obj);
> + struct panfrost_device *pfdev = obj->dev->dev_private;
> +
> + spin_lock(&pfdev->mm_lock);
> + ret = drm_mm_insert_node_generic(&pfdev->mm, &bo->node,
> + size >> PAGE_SHIFT, align, 0, 0);
> + if (ret)
> + goto out;
> +
> + ret = panfrost_mmu_map(bo);
> + if (ret)
> + drm_mm_remove_node(&bo->node);
> +
> +out:
> + spin_unlock(&pfdev->mm_lock);
> + return ret;
> +}
> +
> +static void panfrost_gem_close(struct drm_gem_object *obj, struct drm_file
> *file_priv)
> {
> struct panfrost_gem_object *bo = to_panfrost_bo(obj);
> struct panfrost_device *pfdev = obj->dev->dev_private;
> @@ -23,19 +56,15 @@ static void panfrost_gem_free_object(struct
> drm_gem_object *obj)
> panfrost_mmu_unmap(bo);
>
> spin_lock(&pfdev->mm_lock);
> - drm_mm_remove_node(&bo->node);
> + if (drm_mm_node_allocated(&bo->node))
> + drm_mm_remove_node(&bo->node);
> spin_unlock(&pfdev->mm_lock);
> -
> - mutex_lock(&pfdev->shrinker_lock);
> - if (!list_empty(&bo->base.madv_list))
> - list_del(&bo->base.madv_list);
> - mutex_unlock(&pfdev->shrinker_lock);
> -
> - drm_gem_shmem_free_object(obj);
> }
>
> static const struct drm_gem_object_funcs panfrost_gem_funcs = {
> .free = panfrost_gem_free_object,
> + .open = panfrost_gem_open,
> + .close = panfrost_gem_close,
> .print_info = drm_gem_shmem_print_info,
> .pin = drm_gem_shmem_pin,
> .unpin = drm_gem_shmem_unpin,
> @@ -55,10 +84,7 @@ static const struct drm_gem_object_funcs
> panfrost_gem_funcs = {
> */
> struct drm_gem_object *panfrost_gem_create_object(struct drm_device *dev,
> size_t size)
> {
> - int ret;
> - struct panfrost_device *pfdev = dev->dev_private;
> struct panfrost_gem_object *obj;
> - u64 align;
>
> obj = kzalloc(sizeof(*obj), GFP_KERNEL);
> if (!obj)
> @@ -66,21 +92,7 @@ struct drm_gem_object *panfrost_gem_create_object(struct
> drm_device *dev, size_t
>
> obj->base.base.funcs = &panfrost_gem_funcs;
>
> - size = roundup(size, PAGE_SIZE);
> - align = size >= SZ_2M ? SZ_2M >> PAGE_SHIFT : 0;
> -
> - spin_lock(&pfdev->mm_lock);
> - ret = drm_mm_insert_node_generic(&pfdev->mm, &obj->node,
> - size >> PAGE_SHIFT, align, 0, 0);
> - spin_unlock(&pfdev->mm_lock);
> - if (ret)
> - goto free_obj;
> -
> return &obj->base.base;
> -
> -free_obj:
> - kfree(obj);
> - return ERR_PTR(ret);
> }
>
> struct drm_gem_object *
> @@ -89,15 +101,10 @@ panfrost_gem_prime_import_sg_table(struct drm_device
> *dev,
> struct sg_table *sgt)
> {
> struct drm_gem_object *obj;
> - struct panfrost_gem_object *pobj;
>
> obj = drm_gem_shmem_prime_import_sg_table(dev, attach, sgt);
> if (IS_ERR(obj))
> return ERR_CAST(obj);
>
> - pobj = to_panfrost_bo(obj);
> -
> - panfrost_mmu_map(pobj);
> -
> return obj;
> }
> --
> 2.20.1
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