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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"
#include "i915_trace.h"
#include "i915_user_extensions.h"
static int i915_gem_publish(struct drm_i915_gem_object *obj,
struct drm_file *file,
u64 *size_p,
u32 *handle_p)
{
u64 size = obj->base.size;
int ret;
ret = drm_gem_handle_create(file, &obj->base, handle_p);
/* drop reference from allocate - handle holds it now */
i915_gem_object_put(obj);
if (ret)
return ret;
*size_p = size;
return 0;
}
static int
i915_gem_setup(struct drm_i915_gem_object *obj,
struct intel_memory_region *mr,
u64 size)
{
int ret;
GEM_BUG_ON(!is_power_of_2(mr->min_page_size));
size = round_up(size, 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));
if (i915_gem_object_size_2big(size))
return -E2BIG;
ret = mr->ops->init_object(mr, obj, size, 0);
if (ret)
return ret;
GEM_BUG_ON(size != obj->base.size);
trace_i915_gem_object_create(obj);
return 0;
}
int
i915_gem_dumb_create(struct drm_file *file,
struct drm_device *dev,
struct drm_mode_create_dumb *args)
{
struct drm_i915_gem_object *obj;
enum intel_memory_type mem_type;
int cpp = DIV_ROUND_UP(args->bpp, 8);
u32 format;
int ret;
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;
obj = i915_gem_object_alloc();
if (!obj)
return -ENOMEM;
ret = i915_gem_setup(obj,
intel_memory_region_by_type(to_i915(dev),
mem_type),
args->size);
if (ret)
goto object_free;
return i915_gem_publish(obj, file, &args->size, &args->handle);
object_free:
i915_gem_object_free(obj);
return ret;
}
/**
* 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;
struct drm_i915_gem_object *obj;
int ret;
i915_gem_flush_free_objects(i915);
obj = i915_gem_object_alloc();
if (!obj)
return -ENOMEM;
ret = i915_gem_setup(obj,
intel_memory_region_by_type(i915,
INTEL_MEMORY_SYSTEM),
args->size);
if (ret)
goto object_free;
return i915_gem_publish(obj, file, &args->size, &args->handle);
object_free:
i915_gem_object_free(obj);
return ret;
}
struct create_ext {
struct drm_i915_private *i915;
struct drm_i915_gem_object *vanilla_object;
};
static const i915_user_extension_fn create_extensions[] = {
};
/**
* 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_ext_ioctl(struct drm_device *dev, void *data,
struct drm_file *file)
{
struct drm_i915_private *i915 = to_i915(dev);
struct drm_i915_gem_create_ext *args = data;
struct create_ext ext_data = { .i915 = i915 };
struct drm_i915_gem_object *obj;
int ret;
if (args->flags)
return -EINVAL;
i915_gem_flush_free_objects(i915);
obj = i915_gem_object_alloc();
if (!obj)
return -ENOMEM;
ext_data.vanilla_object = obj;
ret = i915_user_extensions(u64_to_user_ptr(args->extensions),
create_extensions,
ARRAY_SIZE(create_extensions),
&ext_data);
if (ret)
goto object_free;
ret = i915_gem_setup(obj,
intel_memory_region_by_type(i915,
INTEL_MEMORY_SYSTEM),
args->size);
if (ret)
goto object_free;
return i915_gem_publish(obj, file, &args->size, &args->handle);
object_free:
i915_gem_object_free(obj);
return ret;
}
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