From: Thomas Zimmermann Date: Fri, 8 Jan 2021 14:08:08 +0000 (+0100) Subject: drm/vc4: Move mmap implementation into GEM object function X-Git-Tag: accepted/tizen/unified/20230118.172025~6402^2~28^2~988 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=fa49fdbe78a5af9e438608e53ad4d7123f25bd45;p=platform%2Fkernel%2Flinux-rpi.git drm/vc4: Move mmap implementation into GEM object function Moving vc4's mmap code from vc4_mmap() into a GEM object function allows for the use drm_gem_mmap() and drm_gem_prime_mmap(). The content of vc4_drm_fpos can then be generated by DEFINE_DRM_GEM_FOPS(). The actual mmap implementation is just a check if the BO is a validated shader plus the default CMA mmap code. Signed-off-by: Thomas Zimmermann Acked-by: Maxime Ripard Link: https://patchwork.freedesktop.org/patch/msgid/20210108140808.25775-4-tzimmermann@suse.de --- diff --git a/drivers/gpu/drm/vc4/vc4_bo.c b/drivers/gpu/drm/vc4/vc4_bo.c index f9b42ff..28e48ef 100644 --- a/drivers/gpu/drm/vc4/vc4_bo.c +++ b/drivers/gpu/drm/vc4/vc4_bo.c @@ -704,19 +704,9 @@ static vm_fault_t vc4_fault(struct vm_fault *vmf) return VM_FAULT_SIGBUS; } -int vc4_mmap(struct file *filp, struct vm_area_struct *vma) +static int vc4_gem_object_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma) { - struct drm_gem_object *gem_obj; - unsigned long vm_pgoff; - struct vc4_bo *bo; - int ret; - - ret = drm_gem_mmap(filp, vma); - if (ret) - return ret; - - gem_obj = vma->vm_private_data; - bo = to_vc4_bo(gem_obj); + struct vc4_bo *bo = to_vc4_bo(obj); if (bo->validated_shader && (vma->vm_flags & VM_WRITE)) { DRM_DEBUG("mmaping of shader BOs for writing not allowed.\n"); @@ -730,45 +720,7 @@ int vc4_mmap(struct file *filp, struct vm_area_struct *vma) return -EINVAL; } - /* - * Clear the VM_PFNMAP flag that was set by drm_gem_mmap(), and set the - * vm_pgoff (used as a fake buffer offset by DRM) to 0 as we want to map - * the whole buffer. - */ - vma->vm_flags &= ~VM_PFNMAP; - - /* This ->vm_pgoff dance is needed to make all parties happy: - * - dma_mmap_wc() uses ->vm_pgoff as an offset within the allocated - * mem-region, hence the need to set it to zero (the value set by - * the DRM core is a virtual offset encoding the GEM object-id) - * - the mmap() core logic needs ->vm_pgoff to be restored to its - * initial value before returning from this function because it - * encodes the offset of this GEM in the dev->anon_inode pseudo-file - * and this information will be used when we invalidate userspace - * mappings with drm_vma_node_unmap() (called from vc4_gem_purge()). - */ - vm_pgoff = vma->vm_pgoff; - vma->vm_pgoff = 0; - ret = dma_mmap_wc(bo->base.base.dev->dev, vma, bo->base.vaddr, - bo->base.paddr, vma->vm_end - vma->vm_start); - vma->vm_pgoff = vm_pgoff; - - if (ret) - drm_gem_vm_close(vma); - - return ret; -} - -int vc4_prime_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma) -{ - struct vc4_bo *bo = to_vc4_bo(obj); - - if (bo->validated_shader && (vma->vm_flags & VM_WRITE)) { - DRM_DEBUG("mmaping of shader BOs for writing not allowed.\n"); - return -EINVAL; - } - - return drm_gem_prime_mmap(obj, vma); + return drm_gem_cma_mmap(obj, vma); } static const struct vm_operations_struct vc4_vm_ops = { @@ -782,6 +734,7 @@ static const struct drm_gem_object_funcs vc4_gem_object_funcs = { .export = vc4_prime_export, .get_sg_table = drm_gem_cma_get_sg_table, .vmap = drm_gem_cma_vmap, + .mmap = vc4_gem_object_mmap, .vm_ops = &vc4_vm_ops, }; diff --git a/drivers/gpu/drm/vc4/vc4_drv.c b/drivers/gpu/drm/vc4/vc4_drv.c index 2cd97a3..d9b3bba 100644 --- a/drivers/gpu/drm/vc4/vc4_drv.c +++ b/drivers/gpu/drm/vc4/vc4_drv.c @@ -140,17 +140,7 @@ static void vc4_close(struct drm_device *dev, struct drm_file *file) kfree(vc4file); } -static const struct file_operations vc4_drm_fops = { - .owner = THIS_MODULE, - .open = drm_open, - .release = drm_release, - .unlocked_ioctl = drm_ioctl, - .mmap = vc4_mmap, - .poll = drm_poll, - .read = drm_read, - .compat_ioctl = drm_compat_ioctl, - .llseek = noop_llseek, -}; +DEFINE_DRM_GEM_FOPS(vc4_drm_fops); static const struct drm_ioctl_desc vc4_drm_ioctls[] = { DRM_IOCTL_DEF_DRV(VC4_SUBMIT_CL, vc4_submit_cl_ioctl, DRM_RENDER_ALLOW), @@ -193,7 +183,7 @@ static struct drm_driver vc4_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 = vc4_prime_import_sg_table, - .gem_prime_mmap = vc4_prime_mmap, + .gem_prime_mmap = drm_gem_prime_mmap, .dumb_create = vc4_dumb_create, diff --git a/drivers/gpu/drm/vc4/vc4_drv.h b/drivers/gpu/drm/vc4/vc4_drv.h index a3d8d87..0d9c0ec 100644 --- a/drivers/gpu/drm/vc4/vc4_drv.h +++ b/drivers/gpu/drm/vc4/vc4_drv.h @@ -801,8 +801,6 @@ int vc4_get_hang_state_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv); int vc4_label_bo_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv); -int vc4_mmap(struct file *filp, struct vm_area_struct *vma); -int vc4_prime_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma); struct drm_gem_object *vc4_prime_import_sg_table(struct drm_device *dev, struct dma_buf_attachment *attach, struct sg_table *sgt);