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// 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);
}
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