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// SPDX-License-Identifier: MIT
/*
* Copyright © 2019 Intel Corporation
*/
#include "intel_memory_region.h"
#include "i915_drv.h"
#include "i915_ttm_buddy_manager.h"
static const struct {
u16 class;
u16 instance;
} intel_region_map[] = {
[INTEL_REGION_SMEM] = {
.class = INTEL_MEMORY_SYSTEM,
.instance = 0,
},
[INTEL_REGION_LMEM] = {
.class = INTEL_MEMORY_LOCAL,
.instance = 0,
},
[INTEL_REGION_STOLEN_SMEM] = {
.class = INTEL_MEMORY_STOLEN_SYSTEM,
.instance = 0,
},
[INTEL_REGION_STOLEN_LMEM] = {
.class = INTEL_MEMORY_STOLEN_LOCAL,
.instance = 0,
},
};
struct intel_memory_region *
intel_memory_region_lookup(struct drm_i915_private *i915,
u16 class, u16 instance)
{
struct intel_memory_region *mr;
int id;
/* XXX: consider maybe converting to an rb tree at some point */
for_each_memory_region(mr, i915, id) {
if (mr->type == class && mr->instance == instance)
return mr;
}
return NULL;
}
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;
}
/**
* intel_memory_region_reserve - Reserve a memory range
* @mem: The region for which we want to reserve a range.
* @offset: Start of the range to reserve.
* @size: The size of the range to reserve.
*
* Return: 0 on success, negative error code on failure.
*/
int intel_memory_region_reserve(struct intel_memory_region *mem,
resource_size_t offset,
resource_size_t size)
{
struct ttm_resource_manager *man = mem->region_private;
GEM_BUG_ON(mem->is_range_manager);
return i915_ttm_buddy_man_reserve(man, offset, size);
}
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,
u16 type,
u16 instance,
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;
mem->type = type;
mem->instance = instance;
mutex_init(&mem->objects.lock);
INIT_LIST_HEAD(&mem->objects.list);
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->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);
u16 type, instance;
if (!HAS_REGION(i915, BIT(i)))
continue;
type = intel_region_map[i].class;
instance = intel_region_map[i].instance;
switch (type) {
case INTEL_MEMORY_SYSTEM:
if (IS_DGFX(i915))
mem = i915_gem_ttm_system_setup(i915, type,
instance);
else
mem = i915_gem_shmem_setup(i915, type,
instance);
break;
case INTEL_MEMORY_STOLEN_LOCAL:
mem = i915_gem_stolen_lmem_setup(i915, type, instance);
if (!IS_ERR(mem))
i915->mm.stolen_region = mem;
break;
case INTEL_MEMORY_STOLEN_SYSTEM:
mem = i915_gem_stolen_smem_setup(i915, type, instance);
if (!IS_ERR(mem))
i915->mm.stolen_region = mem;
break;
default:
continue;
}
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 = 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
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