// SPDX-License-Identifier: MIT
/*
* Copyright © 2020 Intel Corporation
*/
#include <drm/drm_fourcc.h>
#include "display/intel_display.h"
#include "gem/i915_gem_ioctls.h"
#include "gem/i915_gem_lmem.h"
#include "gem/i915_gem_region.h"
#include "pxp/intel_pxp.h"
#include "i915_drv.h"
#include "i915_gem_create.h"
#include "i915_trace.h"
#include "i915_user_extensions.h"
static u32 object_max_page_size(struct intel_memory_region **placements,
unsigned int n_placements)
{
u32 max_page_size = 0;
int i;
for (i = 0; i < n_placements; i++) {
struct intel_memory_region *mr = placements[i];
GEM_BUG_ON(!is_power_of_2(mr->min_page_size));
max_page_size = max_t(u32, max_page_size, mr->min_page_size);
}
GEM_BUG_ON(!max_page_size);
return max_page_size;
}
static int object_set_placements(struct drm_i915_gem_object *obj,
struct intel_memory_region **placements,
unsigned int n_placements)
{
struct intel_memory_region **arr;
unsigned int i;
GEM_BUG_ON(!n_placements);
/*
* For the common case of one memory region, skip storing an
* allocated array and just point at the region directly.
*/
if (n_placements == 1) {
struct intel_memory_region *mr = placements[0];
struct drm_i915_private *i915 = mr->i915;
obj->mm.placements = &i915->mm.regions[mr->id];
obj->mm.n_placements = 1;
} else {
arr = kmalloc_array(n_placements,
sizeof(struct intel_memory_region *),
GFP_KERNEL);
if (!arr)
return -ENOMEM;
for (i = 0; i < n_placements; i++)
arr[i] = placements[i];
obj->mm.placements = arr;
obj->mm.n_placements = n_placements;
}
return 0;
}
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 struct drm_i915_gem_object *
__i915_gem_object_create_user_ext(struct drm_i915_private *i915, u64 size,
struct intel_memory_region **placements,
unsigned int n_placements,
unsigned int ext_flags)
{
struct intel_memory_region *mr = placements[0];
struct drm_i915_gem_object *obj;
unsigned int flags;
int ret;
i915_gem_flush_free_objects(i915);
size = round_up(size, object_max_page_size(placements, n_placements));
if (size == 0)
return ERR_PTR(-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 ERR_PTR(-E2BIG);
obj = i915_gem_object_alloc();
if (!obj)
return ERR_PTR(-ENOMEM);
ret = object_set_placements(obj, placements, n_placements);
if (ret)
goto object_free;
/*
* I915_BO_ALLOC_USER will make sure the object is cleared before
* any user access.
*/
flags = I915_BO_ALLOC_USER;
ret = mr->ops->init_object(mr, obj, I915_BO_INVALID_OFFSET, size, 0, flags);
if (ret)
goto object_free;
GEM_BUG_ON(size != obj->base.size);
/* Add any flag set by create_ext options */
obj->flags |= ext_flags;
trace_i915_gem_object_create(obj);
return obj;
object_free:
if (obj->mm.n_placements > 1)
kfree(obj->mm.placements);
i915_gem_object_free(obj);
return ERR_PTR(ret);
}
/**
* __i915_gem_object_create_user - Creates a new object using the same path as
* DRM_I915_GEM_CREATE_EXT
* @i915: i915 private
* @size: size of the buffer, in bytes
* @placements: possible placement regions, in priority order
* @n_placements: number of possible placement regions
*
* This function is exposed primarily for selftests and does very little
* error checking. It is assumed that the set of placement regions has
* already been verified to be valid.
*/
struct drm_i915_gem_object *
__i915_gem_object_create_user(struct drm_i915_private *i915, u64 size,
struct intel_memory_region **placements,
unsigned int n_placements)
{
return __i915_gem_object_create_user_ext(i915, size, placements,
n_placements, 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;
struct intel_memory_region *mr;
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;
mr = intel_memory_region_by_type(to_i915(dev), mem_type);
obj = __i915_gem_object_create_user(to_i915(dev), args->size, &mr, 1);
if (IS_ERR(obj))
return PTR_ERR(obj);
return i915_gem_publish(obj, file, &args->size, &args->handle);
}
/**
* i915_gem_create_ioctl - 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;
struct intel_memory_region *mr;
mr = intel_memory_region_by_type(i915, INTEL_MEMORY_SYSTEM);
obj = __i915_gem_object_create_user(i915, args->size, &mr, 1);
if (IS_ERR(obj))
return PTR_ERR(obj);
return i915_gem_publish(obj, file, &args->size, &args->handle);
}
struct create_ext {
struct drm_i915_private *i915;
struct intel_memory_region *placements[INTEL_REGION_UNKNOWN];
unsigned int n_placements;
unsigned int placement_mask;
unsigned long flags;
unsigned int pat_index;
};
static void repr_placements(char *buf, size_t size,
struct intel_memory_region **placements,
int n_placements)
{
int i;
buf[0] = '\0';
for (i = 0; i < n_placements; i++) {
struct intel_memory_region *mr = placements[i];
int r;
r = snprintf(buf, size, "\n %s -> { class: %d, inst: %d }",
mr->name, mr->type, mr->instance);
if (r >= size)
return;
buf += r;
size -= r;
}
}
static int set_placements(struct drm_i915_gem_create_ext_memory_regions *args,
struct create_ext *ext_data)
{
struct drm_i915_private *i915 = ext_data->i915;
struct drm_i915_gem_memory_class_instance __user *uregions =
u64_to_user_ptr(args->regions);
struct intel_memory_region *placements[INTEL_REGION_UNKNOWN];
u32 mask;
int i, ret = 0;
if (args->pad) {
drm_dbg(&i915->drm, "pad should be zero\n");
ret = -EINVAL;
}
if (!args->num_regions) {
drm_dbg(&i915->drm, "num_regions is zero\n");
ret = -EINVAL;
}
BUILD_BUG_ON(ARRAY_SIZE(i915->mm.regions) != ARRAY_SIZE(placements));
BUILD_BUG_ON(ARRAY_SIZE(ext_data->placements) != ARRAY_SIZE(placements));
if (args->num_regions > ARRAY_SIZE(i915->mm.regions)) {
drm_dbg(&i915->drm, "num_regions is too large\n");
ret = -EINVAL;
}
if (ret)
return ret;
mask = 0;
for (i = 0; i < args->num_regions; i++) {
struct drm_i915_gem_memory_class_instance region;
struct intel_memory_region *mr;
if (copy_from_user(®ion, uregions, sizeof(region)))
return -EFAULT;
mr = intel_memory_region_lookup(i915,
region.memory_class,
region.memory_instance);
if (!mr || mr->private) {
drm_dbg(&i915->drm, "Device is missing region { class: %d, inst: %d } at index = %d\n",
region.memory_class, region.memory_instance, i);
ret = -EINVAL;
goto out_dump;
}
if (mask & BIT(mr->id)) {
drm_dbg(&i915->drm, "Found duplicate placement %s -> { class: %d, inst: %d } at index = %d\n",
mr->name, region.memory_class,
region.memory_instance, i);
ret = -EINVAL;
goto out_dump;
}
placements[i] = mr;
mask |= BIT(mr->id);
++uregions;
}
if (ext_data->n_placements) {
ret = -EINVAL;
goto out_dump;
}
ext_data->n_placements = args->num_regions;
for (i = 0; i < args->num_regions; i++)
ext_data->placements[i] = placements[i];
ext_data->placement_mask = mask;
return 0;
out_dump:
if (1) {
char buf[256];
if (ext_data->n_placements) {
repr_placements(buf,
sizeof(buf),
ext_data->placements,
ext_data->n_placements);
drm_dbg(&i915->drm,
"Placements were already set in previous EXT. Existing placements: %s\n",
buf);
}
repr_placements(buf, sizeof(buf), placements, i);
drm_dbg(&i915->drm, "New placements(so far validated): %s\n", buf);
}
return ret;
}
static int ext_set_placements(struct i915_user_extension __user *base,
void *data)
{
struct drm_i915_gem_create_ext_memory_regions ext;
if (copy_from_user(&ext, base, sizeof(ext)))
return -EFAULT;
return set_placements(&ext, data);
}
static int ext_set_protected(struct i915_user_extension __user *base, void *data)
{
struct drm_i915_gem_create_ext_protected_content ext;
struct create_ext *ext_data = data;
if (copy_from_user(&ext, base, sizeof(ext)))
return -EFAULT;
if (ext.flags)
return -EINVAL;
if (!intel_pxp_is_enabled(ext_data->i915->pxp))
return -ENODEV;
ext_data->flags |= I915_BO_PROTECTED;
return 0;
}
static int ext_set_pat(struct i915_user_extension __user *base, void *data)
{
struct create_ext *ext_data = data;
struct drm_i915_private *i915 = ext_data->i915;
struct drm_i915_gem_create_ext_set_pat ext;
unsigned int max_pat_index;
BUILD_BUG_ON(sizeof(struct drm_i915_gem_create_ext_set_pat) !=
offsetofend(struct drm_i915_gem_create_ext_set_pat, rsvd));
/* Limiting the extension only to Meteor Lake */
if (!IS_METEORLAKE(i915))
return -ENODEV;
if (copy_from_user(&ext, base, sizeof(ext)))
return -EFAULT;
max_pat_index = INTEL_INFO(i915)->max_pat_index;
if (ext.pat_index > max_pat_index) {
drm_dbg(&i915->drm, "PAT index is invalid: %u\n",
ext.pat_index);
return -EINVAL;
}
ext_data->pat_index = ext.pat_index;
return 0;
}
static const i915_user_extension_fn create_extensions[] = {
[I915_GEM_CREATE_EXT_MEMORY_REGIONS] = ext_set_placements,
[I915_GEM_CREATE_EXT_PROTECTED_CONTENT] = ext_set_protected,
[I915_GEM_CREATE_EXT_SET_PAT] = ext_set_pat,
};
#define PAT_INDEX_NOT_SET 0xffff
/**
* i915_gem_create_ext_ioctl - 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 & ~I915_GEM_CREATE_EXT_FLAG_NEEDS_CPU_ACCESS)
return -EINVAL;
ext_data.pat_index = PAT_INDEX_NOT_SET;
ret = i915_user_extensions(u64_to_user_ptr(args->extensions),
create_extensions,
ARRAY_SIZE(create_extensions),
&ext_data);
if (ret)
return ret;
if (!ext_data.n_placements) {
ext_data.placements[0] =
intel_memory_region_by_type(i915, INTEL_MEMORY_SYSTEM);
ext_data.n_placements = 1;
}
if (args->flags & I915_GEM_CREATE_EXT_FLAG_NEEDS_CPU_ACCESS) {
if (ext_data.n_placements == 1)
return -EINVAL;
/*
* We always need to be able to spill to system memory, if we
* can't place in the mappable part of LMEM.
*/
if (!(ext_data.placement_mask & BIT(INTEL_REGION_SMEM)))
return -EINVAL;
} else {
if (ext_data.n_placements > 1 ||
ext_data.placements[0]->type != INTEL_MEMORY_SYSTEM)
ext_data.flags |= I915_BO_ALLOC_GPU_ONLY;
}
obj = __i915_gem_object_create_user_ext(i915, args->size,
ext_data.placements,
ext_data.n_placements,
ext_data.flags);
if (IS_ERR(obj))
return PTR_ERR(obj);
if (ext_data.pat_index != PAT_INDEX_NOT_SET) {
i915_gem_object_set_pat_index(obj, ext_data.pat_index);
/* Mark pat_index is set by UMD */
obj->pat_set_by_user = true;
}
return i915_gem_publish(obj, file, &args->size, &args->handle);
}
