[PATCH] drm/rockchip: Implement mmap as GEM object function
Thomas Zimmermann
tzimmermann at suse.de
Thu Jul 8 05:01:30 PDT 2021
ping for review
Am 24.06.21 um 11:55 schrieb Thomas Zimmermann:
> Moving the driver-specific mmap code into a GEM object function allows
> for using DRM helpers for various mmap callbacks.
>
> The respective rockchip functions are being removed. The file_operations
> structure fops is now being created by the helper macro
> DEFINE_DRM_GEM_FOPS().
>
> Signed-off-by: Thomas Zimmermann <tzimmermann at suse.de>
> ---
> drivers/gpu/drm/rockchip/rockchip_drm_drv.c | 13 +-----
> drivers/gpu/drm/rockchip/rockchip_drm_fbdev.c | 3 +-
> drivers/gpu/drm/rockchip/rockchip_drm_gem.c | 44 +++++--------------
> drivers/gpu/drm/rockchip/rockchip_drm_gem.h | 7 ---
> 4 files changed, 15 insertions(+), 52 deletions(-)
>
> diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_drv.c b/drivers/gpu/drm/rockchip/rockchip_drm_drv.c
> index b730b8d5d949..2e3ab573a817 100644
> --- a/drivers/gpu/drm/rockchip/rockchip_drm_drv.c
> +++ b/drivers/gpu/drm/rockchip/rockchip_drm_drv.c
> @@ -208,16 +208,7 @@ static void rockchip_drm_unbind(struct device *dev)
> drm_dev_put(drm_dev);
> }
>
> -static const struct file_operations rockchip_drm_driver_fops = {
> - .owner = THIS_MODULE,
> - .open = drm_open,
> - .mmap = rockchip_gem_mmap,
> - .poll = drm_poll,
> - .read = drm_read,
> - .unlocked_ioctl = drm_ioctl,
> - .compat_ioctl = drm_compat_ioctl,
> - .release = drm_release,
> -};
> +DEFINE_DRM_GEM_FOPS(rockchip_drm_driver_fops);
>
> static const struct drm_driver rockchip_drm_driver = {
> .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_ATOMIC,
> @@ -226,7 +217,7 @@ static const struct drm_driver rockchip_drm_driver = {
> .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
> .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
> .gem_prime_import_sg_table = rockchip_gem_prime_import_sg_table,
> - .gem_prime_mmap = rockchip_gem_mmap_buf,
> + .gem_prime_mmap = drm_gem_prime_mmap,
> .fops = &rockchip_drm_driver_fops,
> .name = DRIVER_NAME,
> .desc = DRIVER_DESC,
> diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_fbdev.c b/drivers/gpu/drm/rockchip/rockchip_drm_fbdev.c
> index 2fdc455c4ad7..d8418dd39d0e 100644
> --- a/drivers/gpu/drm/rockchip/rockchip_drm_fbdev.c
> +++ b/drivers/gpu/drm/rockchip/rockchip_drm_fbdev.c
> @@ -7,6 +7,7 @@
> #include <drm/drm.h>
> #include <drm/drm_fb_helper.h>
> #include <drm/drm_fourcc.h>
> +#include <drm/drm_prime.h>
> #include <drm/drm_probe_helper.h>
>
> #include "rockchip_drm_drv.h"
> @@ -24,7 +25,7 @@ static int rockchip_fbdev_mmap(struct fb_info *info,
> struct drm_fb_helper *helper = info->par;
> struct rockchip_drm_private *private = to_drm_private(helper);
>
> - return rockchip_gem_mmap_buf(private->fbdev_bo, vma);
> + return drm_gem_prime_mmap(private->fbdev_bo, vma);
> }
>
> static const struct fb_ops rockchip_drm_fbdev_ops = {
> diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_gem.c b/drivers/gpu/drm/rockchip/rockchip_drm_gem.c
> index 7971f57436dd..63eb73b624aa 100644
> --- a/drivers/gpu/drm/rockchip/rockchip_drm_gem.c
> +++ b/drivers/gpu/drm/rockchip/rockchip_drm_gem.c
> @@ -240,12 +240,22 @@ static int rockchip_drm_gem_object_mmap(struct drm_gem_object *obj,
> int ret;
> struct rockchip_gem_object *rk_obj = to_rockchip_obj(obj);
>
> + /*
> + * Set vm_pgoff (used as a fake buffer offset by DRM) to 0 and map the
> + * whole buffer from the start.
> + */
> + vma->vm_pgoff = 0;
> +
> /*
> * We allocated a struct page table for rk_obj, so clear
> * VM_PFNMAP flag that was set by drm_gem_mmap_obj()/drm_gem_mmap().
> */
> + vma->vm_flags |= VM_IO | VM_DONTEXPAND | VM_DONTDUMP;
> vma->vm_flags &= ~VM_PFNMAP;
>
> + vma->vm_page_prot = pgprot_writecombine(vm_get_page_prot(vma->vm_flags));
> + vma->vm_page_prot = pgprot_decrypted(vma->vm_page_prot);
> +
> if (rk_obj->pages)
> ret = rockchip_drm_gem_object_mmap_iommu(obj, vma);
> else
> @@ -257,39 +267,6 @@ static int rockchip_drm_gem_object_mmap(struct drm_gem_object *obj,
> return ret;
> }
>
> -int rockchip_gem_mmap_buf(struct drm_gem_object *obj,
> - struct vm_area_struct *vma)
> -{
> - int ret;
> -
> - ret = drm_gem_mmap_obj(obj, obj->size, vma);
> - if (ret)
> - return ret;
> -
> - return rockchip_drm_gem_object_mmap(obj, vma);
> -}
> -
> -/* drm driver mmap file operations */
> -int rockchip_gem_mmap(struct file *filp, struct vm_area_struct *vma)
> -{
> - struct drm_gem_object *obj;
> - int ret;
> -
> - ret = drm_gem_mmap(filp, vma);
> - if (ret)
> - return ret;
> -
> - /*
> - * Set vm_pgoff (used as a fake buffer offset by DRM) to 0 and map the
> - * whole buffer from the start.
> - */
> - vma->vm_pgoff = 0;
> -
> - obj = vma->vm_private_data;
> -
> - return rockchip_drm_gem_object_mmap(obj, vma);
> -}
> -
> static void rockchip_gem_release_object(struct rockchip_gem_object *rk_obj)
> {
> drm_gem_object_release(&rk_obj->base);
> @@ -301,6 +278,7 @@ static const struct drm_gem_object_funcs rockchip_gem_object_funcs = {
> .get_sg_table = rockchip_gem_prime_get_sg_table,
> .vmap = rockchip_gem_prime_vmap,
> .vunmap = rockchip_gem_prime_vunmap,
> + .mmap = rockchip_drm_gem_object_mmap,
> .vm_ops = &drm_gem_cma_vm_ops,
> };
>
> diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_gem.h b/drivers/gpu/drm/rockchip/rockchip_drm_gem.h
> index 5a70a56cd406..47c1861eece0 100644
> --- a/drivers/gpu/drm/rockchip/rockchip_drm_gem.h
> +++ b/drivers/gpu/drm/rockchip/rockchip_drm_gem.h
> @@ -34,13 +34,6 @@ rockchip_gem_prime_import_sg_table(struct drm_device *dev,
> int rockchip_gem_prime_vmap(struct drm_gem_object *obj, struct dma_buf_map *map);
> void rockchip_gem_prime_vunmap(struct drm_gem_object *obj, struct dma_buf_map *map);
>
> -/* drm driver mmap file operations */
> -int rockchip_gem_mmap(struct file *filp, struct vm_area_struct *vma);
> -
> -/* mmap a gem object to userspace. */
> -int rockchip_gem_mmap_buf(struct drm_gem_object *obj,
> - struct vm_area_struct *vma);
> -
> struct rockchip_gem_object *
> rockchip_gem_create_object(struct drm_device *drm, unsigned int size,
> bool alloc_kmap);
>
--
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Maxfeldstr. 5, 90409 Nürnberg, Germany
(HRB 36809, AG Nürnberg)
Geschäftsführer: Felix Imendörffer
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