blob: 1bfcdd89b24163b6367160719e246ccbee42dfe0 [file] [log] [blame]
// SPDX-License-Identifier: MIT
/*
* Copyright © 2019 Intel Corporation
*/
#include "intel_memory_region.h"
#include "i915_drv.h"
/* XXX: Hysterical raisins. BIT(inst) needs to just be (inst) at some point. */
#define REGION_MAP(type, inst) \
BIT((type) + INTEL_MEMORY_TYPE_SHIFT) | BIT(inst)
static const u32 intel_region_map[] = {
[INTEL_REGION_SMEM] = REGION_MAP(INTEL_MEMORY_SYSTEM, 0),
[INTEL_REGION_LMEM] = REGION_MAP(INTEL_MEMORY_LOCAL, 0),
[INTEL_REGION_STOLEN] = REGION_MAP(INTEL_MEMORY_STOLEN, 0),
};
struct intel_memory_region *
intel_memory_region_by_type(struct drm_i915_private *i915,
enum intel_memory_type mem_type)
{
struct intel_memory_region *mr;
int id;
for_each_memory_region(mr, i915, id)
if (mr->type == mem_type)
return mr;
return NULL;
}
static u64
intel_memory_region_free_pages(struct intel_memory_region *mem,
struct list_head *blocks)
{
struct i915_buddy_block *block, *on;
u64 size = 0;
list_for_each_entry_safe(block, on, blocks, link) {
size += i915_buddy_block_size(&mem->mm, block);
i915_buddy_free(&mem->mm, block);
}
INIT_LIST_HEAD(blocks);
return size;
}
void
__intel_memory_region_put_pages_buddy(struct intel_memory_region *mem,
struct list_head *blocks)
{
mutex_lock(&mem->mm_lock);
mem->avail += intel_memory_region_free_pages(mem, blocks);
mutex_unlock(&mem->mm_lock);
}
void
__intel_memory_region_put_block_buddy(struct i915_buddy_block *block)
{
struct list_head blocks;
INIT_LIST_HEAD(&blocks);
list_add(&block->link, &blocks);
__intel_memory_region_put_pages_buddy(block->private, &blocks);
}
int
__intel_memory_region_get_pages_buddy(struct intel_memory_region *mem,
resource_size_t size,
unsigned int flags,
struct list_head *blocks)
{
unsigned int min_order = 0;
unsigned long n_pages;
GEM_BUG_ON(!IS_ALIGNED(size, mem->mm.chunk_size));
GEM_BUG_ON(!list_empty(blocks));
if (flags & I915_ALLOC_MIN_PAGE_SIZE) {
min_order = ilog2(mem->min_page_size) -
ilog2(mem->mm.chunk_size);
}
if (flags & I915_ALLOC_CONTIGUOUS) {
size = roundup_pow_of_two(size);
min_order = ilog2(size) - ilog2(mem->mm.chunk_size);
}
if (size > mem->mm.size)
return -E2BIG;
n_pages = size >> ilog2(mem->mm.chunk_size);
mutex_lock(&mem->mm_lock);
do {
struct i915_buddy_block *block;
unsigned int order;
order = fls(n_pages) - 1;
GEM_BUG_ON(order > mem->mm.max_order);
GEM_BUG_ON(order < min_order);
do {
block = i915_buddy_alloc(&mem->mm, order);
if (!IS_ERR(block))
break;
if (order-- == min_order)
goto err_free_blocks;
} while (1);
n_pages -= BIT(order);
block->private = mem;
list_add_tail(&block->link, blocks);
if (!n_pages)
break;
} while (1);
mem->avail -= size;
mutex_unlock(&mem->mm_lock);
return 0;
err_free_blocks:
intel_memory_region_free_pages(mem, blocks);
mutex_unlock(&mem->mm_lock);
return -ENXIO;
}
struct i915_buddy_block *
__intel_memory_region_get_block_buddy(struct intel_memory_region *mem,
resource_size_t size,
unsigned int flags)
{
struct i915_buddy_block *block;
LIST_HEAD(blocks);
int ret;
ret = __intel_memory_region_get_pages_buddy(mem, size, flags, &blocks);
if (ret)
return ERR_PTR(ret);
block = list_first_entry(&blocks, typeof(*block), link);
list_del_init(&block->link);
return block;
}
int intel_memory_region_init_buddy(struct intel_memory_region *mem)
{
return i915_buddy_init(&mem->mm, resource_size(&mem->region),
PAGE_SIZE);
}
void intel_memory_region_release_buddy(struct intel_memory_region *mem)
{
i915_buddy_fini(&mem->mm);
}
struct intel_memory_region *
intel_memory_region_create(struct drm_i915_private *i915,
resource_size_t start,
resource_size_t size,
resource_size_t min_page_size,
resource_size_t io_start,
const struct intel_memory_region_ops *ops)
{
struct intel_memory_region *mem;
int err;
mem = kzalloc(sizeof(*mem), GFP_KERNEL);
if (!mem)
return ERR_PTR(-ENOMEM);
mem->i915 = i915;
mem->region = (struct resource)DEFINE_RES_MEM(start, size);
mem->io_start = io_start;
mem->min_page_size = min_page_size;
mem->ops = ops;
mem->total = size;
mem->avail = mem->total;
mutex_init(&mem->objects.lock);
INIT_LIST_HEAD(&mem->objects.list);
INIT_LIST_HEAD(&mem->objects.purgeable);
mutex_init(&mem->mm_lock);
if (ops->init) {
err = ops->init(mem);
if (err)
goto err_free;
}
kref_init(&mem->kref);
return mem;
err_free:
kfree(mem);
return ERR_PTR(err);
}
void intel_memory_region_set_name(struct intel_memory_region *mem,
const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
vsnprintf(mem->name, sizeof(mem->name), fmt, ap);
va_end(ap);
}
static void __intel_memory_region_destroy(struct kref *kref)
{
struct intel_memory_region *mem =
container_of(kref, typeof(*mem), kref);
if (mem->ops->release)
mem->ops->release(mem);
mutex_destroy(&mem->mm_lock);
mutex_destroy(&mem->objects.lock);
kfree(mem);
}
struct intel_memory_region *
intel_memory_region_get(struct intel_memory_region *mem)
{
kref_get(&mem->kref);
return mem;
}
void intel_memory_region_put(struct intel_memory_region *mem)
{
kref_put(&mem->kref, __intel_memory_region_destroy);
}
/* Global memory region registration -- only slight layer inversions! */
int intel_memory_regions_hw_probe(struct drm_i915_private *i915)
{
int err, i;
for (i = 0; i < ARRAY_SIZE(i915->mm.regions); i++) {
struct intel_memory_region *mem = ERR_PTR(-ENODEV);
u32 type;
if (!HAS_REGION(i915, BIT(i)))
continue;
type = MEMORY_TYPE_FROM_REGION(intel_region_map[i]);
switch (type) {
case INTEL_MEMORY_SYSTEM:
mem = i915_gem_shmem_setup(i915);
break;
case INTEL_MEMORY_STOLEN:
mem = i915_gem_stolen_setup(i915);
break;
case INTEL_MEMORY_LOCAL:
mem = intel_setup_fake_lmem(i915);
break;
}
if (IS_ERR(mem)) {
err = PTR_ERR(mem);
drm_err(&i915->drm,
"Failed to setup region(%d) type=%d\n",
err, type);
goto out_cleanup;
}
mem->id = intel_region_map[i];
mem->type = type;
mem->instance = MEMORY_INSTANCE_FROM_REGION(intel_region_map[i]);
i915->mm.regions[i] = mem;
}
return 0;
out_cleanup:
intel_memory_regions_driver_release(i915);
return err;
}
void intel_memory_regions_driver_release(struct drm_i915_private *i915)
{
int i;
for (i = 0; i < ARRAY_SIZE(i915->mm.regions); i++) {
struct intel_memory_region *region =
fetch_and_zero(&i915->mm.regions[i]);
if (region)
intel_memory_region_put(region);
}
}
#if IS_ENABLED(CONFIG_DRM_I915_SELFTEST)
#include "selftests/intel_memory_region.c"
#include "selftests/mock_region.c"
#endif