diff options
Diffstat (limited to 'drivers/gpu/drm/i915/gem/i915_gem_create.c')
-rw-r--r-- | drivers/gpu/drm/i915/gem/i915_gem_create.c | 113 |
1 files changed, 113 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_create.c b/drivers/gpu/drm/i915/gem/i915_gem_create.c new file mode 100644 index 000000000000..45d60e3d98e3 --- /dev/null +++ b/drivers/gpu/drm/i915/gem/i915_gem_create.c @@ -0,0 +1,113 @@ +// SPDX-License-Identifier: MIT +/* + * Copyright © 2020 Intel Corporation + */ + +#include "gem/i915_gem_ioctls.h" +#include "gem/i915_gem_region.h" + +#include "i915_drv.h" + +static int +i915_gem_create(struct drm_file *file, + struct intel_memory_region *mr, + u64 *size_p, + u32 *handle_p) +{ + struct drm_i915_gem_object *obj; + u32 handle; + u64 size; + int ret; + + GEM_BUG_ON(!is_power_of_2(mr->min_page_size)); + size = round_up(*size_p, mr->min_page_size); + if (size == 0) + return -EINVAL; + + /* For most of the ABI (e.g. mmap) we think in system pages */ + GEM_BUG_ON(!IS_ALIGNED(size, PAGE_SIZE)); + + /* Allocate the new object */ + obj = i915_gem_object_create_region(mr, size, 0); + if (IS_ERR(obj)) + return PTR_ERR(obj); + + GEM_BUG_ON(size != obj->base.size); + + ret = drm_gem_handle_create(file, &obj->base, &handle); + /* drop reference from allocate - handle holds it now */ + i915_gem_object_put(obj); + if (ret) + return ret; + + *handle_p = handle; + *size_p = size; + return 0; +} + +int +i915_gem_dumb_create(struct drm_file *file, + struct drm_device *dev, + struct drm_mode_create_dumb *args) +{ + enum intel_memory_type mem_type; + int cpp = DIV_ROUND_UP(args->bpp, 8); + u32 format; + + switch (cpp) { + case 1: + format = DRM_FORMAT_C8; + break; + case 2: + format = DRM_FORMAT_RGB565; + break; + case 4: + format = DRM_FORMAT_XRGB8888; + break; + default: + return -EINVAL; + } + + /* have to work out size/pitch and return them */ + args->pitch = ALIGN(args->width * cpp, 64); + + /* align stride to page size so that we can remap */ + if (args->pitch > intel_plane_fb_max_stride(to_i915(dev), format, + DRM_FORMAT_MOD_LINEAR)) + args->pitch = ALIGN(args->pitch, 4096); + + if (args->pitch < args->width) + return -EINVAL; + + args->size = mul_u32_u32(args->pitch, args->height); + + mem_type = INTEL_MEMORY_SYSTEM; + if (HAS_LMEM(to_i915(dev))) + mem_type = INTEL_MEMORY_LOCAL; + + return i915_gem_create(file, + intel_memory_region_by_type(to_i915(dev), + mem_type), + &args->size, &args->handle); +} + +/** + * Creates a new mm object and returns a handle to it. + * @dev: drm device pointer + * @data: ioctl data blob + * @file: drm file pointer + */ +int +i915_gem_create_ioctl(struct drm_device *dev, void *data, + struct drm_file *file) +{ + struct drm_i915_private *i915 = to_i915(dev); + struct drm_i915_gem_create *args = data; + + i915_gem_flush_free_objects(i915); + + return i915_gem_create(file, + intel_memory_region_by_type(i915, + INTEL_MEMORY_SYSTEM), + &args->size, &args->handle); +} |