From ff72145badb834e8051719ea66e024784d000cb4 Mon Sep 17 00:00:00 2001 From: Dave Airlie Date: Mon, 7 Feb 2011 12:16:14 +1000 Subject: drm: dumb scanout create/mmap for intel/radeon (v3) This is just an idea that might or might not be a good idea, it basically adds two ioctls to create a dumb and map a dumb buffer suitable for scanout. The handle can be passed to the KMS ioctls to create a framebuffer. It looks to me like it would be useful in the following cases: a) in development drivers - we can always provide a shadowfb fallback. b) libkms users - we can clean up libkms a lot and avoid linking to libdrm_*. c) plymouth via libkms is a lot easier. Userspace bits would be just calls + mmaps. We could probably mark these handles somehow as not being suitable for acceleartion so as top stop people who are dumber than dumb. Signed-off-by: Dave Airlie --- drivers/gpu/drm/radeon/radeon_gem.c | 53 +++++++++++++++++++++++++++++++++---- 1 file changed, 48 insertions(+), 5 deletions(-) (limited to 'drivers/gpu/drm/radeon/radeon_gem.c') diff --git a/drivers/gpu/drm/radeon/radeon_gem.c b/drivers/gpu/drm/radeon/radeon_gem.c index df95eb83dac6..ede5dccdf79f 100644 --- a/drivers/gpu/drm/radeon/radeon_gem.c +++ b/drivers/gpu/drm/radeon/radeon_gem.c @@ -236,23 +236,31 @@ int radeon_gem_set_domain_ioctl(struct drm_device *dev, void *data, return r; } -int radeon_gem_mmap_ioctl(struct drm_device *dev, void *data, - struct drm_file *filp) +int radeon_mode_dumb_mmap(struct drm_file *filp, + struct drm_device *dev, + uint32_t handle, uint64_t *offset_p) { - struct drm_radeon_gem_mmap *args = data; struct drm_gem_object *gobj; struct radeon_bo *robj; - gobj = drm_gem_object_lookup(dev, filp, args->handle); + gobj = drm_gem_object_lookup(dev, filp, handle); if (gobj == NULL) { return -ENOENT; } robj = gobj->driver_private; - args->addr_ptr = radeon_bo_mmap_offset(robj); + *offset_p = radeon_bo_mmap_offset(robj); drm_gem_object_unreference_unlocked(gobj); return 0; } +int radeon_gem_mmap_ioctl(struct drm_device *dev, void *data, + struct drm_file *filp) +{ + struct drm_radeon_gem_mmap *args = data; + + return radeon_mode_dumb_mmap(filp, dev, args->handle, &args->addr_ptr); +} + int radeon_gem_busy_ioctl(struct drm_device *dev, void *data, struct drm_file *filp) { @@ -345,3 +353,38 @@ out: drm_gem_object_unreference_unlocked(gobj); return r; } + +int radeon_mode_dumb_create(struct drm_file *file_priv, + struct drm_device *dev, + struct drm_mode_create_dumb *args) +{ + struct radeon_device *rdev = dev->dev_private; + struct drm_gem_object *gobj; + int r; + + args->pitch = radeon_align_pitch(rdev, args->width, args->bpp, 0) * ((args->bpp + 1) / 8); + args->size = args->pitch * args->height; + args->size = ALIGN(args->size, PAGE_SIZE); + + r = radeon_gem_object_create(rdev, args->size, 0, + RADEON_GEM_DOMAIN_VRAM, + false, ttm_bo_type_device, + &gobj); + if (r) + return -ENOMEM; + + r = drm_gem_handle_create(file_priv, gobj, &args->handle); + if (r) { + drm_gem_object_unreference_unlocked(gobj); + return r; + } + drm_gem_object_handle_unreference_unlocked(gobj); + return 0; +} + +int radeon_mode_dumb_destroy(struct drm_file *file_priv, + struct drm_device *dev, + uint32_t handle) +{ + return drm_gem_handle_delete(file_priv, handle); +} -- cgit v1.2.3