276 lines
5.8 KiB
C
276 lines
5.8 KiB
C
// SPDX-License-Identifier: MIT
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/*
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* Copyright © 2019 Intel Corporation
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*/
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#include "intel_memory_region.h"
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#include "i915_drv.h"
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static const struct {
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u16 class;
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u16 instance;
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} intel_region_map[] = {
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[INTEL_REGION_SMEM] = {
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.class = INTEL_MEMORY_SYSTEM,
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.instance = 0,
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},
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[INTEL_REGION_LMEM] = {
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.class = INTEL_MEMORY_LOCAL,
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.instance = 0,
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},
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[INTEL_REGION_STOLEN_SMEM] = {
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.class = INTEL_MEMORY_STOLEN_SYSTEM,
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.instance = 0,
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},
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[INTEL_REGION_STOLEN_LMEM] = {
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.class = INTEL_MEMORY_STOLEN_LOCAL,
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.instance = 0,
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},
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};
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struct intel_region_reserve {
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struct list_head link;
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struct ttm_resource *res;
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};
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struct intel_memory_region *
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intel_memory_region_lookup(struct drm_i915_private *i915,
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u16 class, u16 instance)
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{
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struct intel_memory_region *mr;
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int id;
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/* XXX: consider maybe converting to an rb tree at some point */
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for_each_memory_region(mr, i915, id) {
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if (mr->type == class && mr->instance == instance)
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return mr;
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}
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return NULL;
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}
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struct intel_memory_region *
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intel_memory_region_by_type(struct drm_i915_private *i915,
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enum intel_memory_type mem_type)
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{
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struct intel_memory_region *mr;
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int id;
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for_each_memory_region(mr, i915, id)
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if (mr->type == mem_type)
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return mr;
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return NULL;
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}
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/**
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* intel_memory_region_unreserve - Unreserve all previously reserved
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* ranges
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* @mem: The region containing the reserved ranges.
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*/
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void intel_memory_region_unreserve(struct intel_memory_region *mem)
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{
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struct intel_region_reserve *reserve, *next;
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if (!mem->priv_ops || !mem->priv_ops->free)
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return;
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mutex_lock(&mem->mm_lock);
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list_for_each_entry_safe(reserve, next, &mem->reserved, link) {
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list_del(&reserve->link);
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mem->priv_ops->free(mem, reserve->res);
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kfree(reserve);
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}
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mutex_unlock(&mem->mm_lock);
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}
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/**
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* intel_memory_region_reserve - Reserve a memory range
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* @mem: The region for which we want to reserve a range.
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* @offset: Start of the range to reserve.
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* @size: The size of the range to reserve.
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*
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* Return: 0 on success, negative error code on failure.
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*/
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int intel_memory_region_reserve(struct intel_memory_region *mem,
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resource_size_t offset,
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resource_size_t size)
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{
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int ret;
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struct intel_region_reserve *reserve;
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if (!mem->priv_ops || !mem->priv_ops->reserve)
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return -EINVAL;
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reserve = kzalloc(sizeof(*reserve), GFP_KERNEL);
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if (!reserve)
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return -ENOMEM;
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reserve->res = mem->priv_ops->reserve(mem, offset, size);
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if (IS_ERR(reserve->res)) {
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ret = PTR_ERR(reserve->res);
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kfree(reserve);
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return ret;
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}
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mutex_lock(&mem->mm_lock);
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list_add_tail(&reserve->link, &mem->reserved);
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mutex_unlock(&mem->mm_lock);
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return 0;
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}
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struct intel_memory_region *
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intel_memory_region_create(struct drm_i915_private *i915,
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resource_size_t start,
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resource_size_t size,
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resource_size_t min_page_size,
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resource_size_t io_start,
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u16 type,
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u16 instance,
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const struct intel_memory_region_ops *ops)
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{
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struct intel_memory_region *mem;
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int err;
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mem = kzalloc(sizeof(*mem), GFP_KERNEL);
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if (!mem)
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return ERR_PTR(-ENOMEM);
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mem->i915 = i915;
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mem->region = (struct resource)DEFINE_RES_MEM(start, size);
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mem->io_start = io_start;
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mem->min_page_size = min_page_size;
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mem->ops = ops;
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mem->total = size;
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mem->avail = mem->total;
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mem->type = type;
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mem->instance = instance;
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mutex_init(&mem->objects.lock);
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INIT_LIST_HEAD(&mem->objects.list);
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INIT_LIST_HEAD(&mem->objects.purgeable);
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INIT_LIST_HEAD(&mem->reserved);
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mutex_init(&mem->mm_lock);
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if (ops->init) {
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err = ops->init(mem);
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if (err)
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goto err_free;
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}
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kref_init(&mem->kref);
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return mem;
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err_free:
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kfree(mem);
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return ERR_PTR(err);
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}
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void intel_memory_region_set_name(struct intel_memory_region *mem,
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const char *fmt, ...)
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{
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va_list ap;
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va_start(ap, fmt);
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vsnprintf(mem->name, sizeof(mem->name), fmt, ap);
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va_end(ap);
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}
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static void __intel_memory_region_destroy(struct kref *kref)
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{
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struct intel_memory_region *mem =
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container_of(kref, typeof(*mem), kref);
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intel_memory_region_unreserve(mem);
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if (mem->ops->release)
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mem->ops->release(mem);
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mutex_destroy(&mem->mm_lock);
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mutex_destroy(&mem->objects.lock);
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kfree(mem);
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}
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struct intel_memory_region *
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intel_memory_region_get(struct intel_memory_region *mem)
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{
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kref_get(&mem->kref);
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return mem;
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}
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void intel_memory_region_put(struct intel_memory_region *mem)
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{
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kref_put(&mem->kref, __intel_memory_region_destroy);
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}
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/* Global memory region registration -- only slight layer inversions! */
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int intel_memory_regions_hw_probe(struct drm_i915_private *i915)
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{
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int err, i;
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for (i = 0; i < ARRAY_SIZE(i915->mm.regions); i++) {
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struct intel_memory_region *mem = ERR_PTR(-ENODEV);
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u16 type, instance;
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if (!HAS_REGION(i915, BIT(i)))
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continue;
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type = intel_region_map[i].class;
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instance = intel_region_map[i].instance;
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switch (type) {
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case INTEL_MEMORY_SYSTEM:
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mem = i915_gem_shmem_setup(i915, type, instance);
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break;
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case INTEL_MEMORY_STOLEN_LOCAL:
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mem = i915_gem_stolen_lmem_setup(i915, type, instance);
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if (!IS_ERR(mem))
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i915->mm.stolen_region = mem;
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break;
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case INTEL_MEMORY_STOLEN_SYSTEM:
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mem = i915_gem_stolen_smem_setup(i915, type, instance);
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if (!IS_ERR(mem))
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i915->mm.stolen_region = mem;
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break;
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default:
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continue;
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}
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if (IS_ERR(mem)) {
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err = PTR_ERR(mem);
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drm_err(&i915->drm,
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"Failed to setup region(%d) type=%d\n",
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err, type);
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goto out_cleanup;
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}
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mem->id = i;
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i915->mm.regions[i] = mem;
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}
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return 0;
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out_cleanup:
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intel_memory_regions_driver_release(i915);
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return err;
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}
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void intel_memory_regions_driver_release(struct drm_i915_private *i915)
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{
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int i;
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for (i = 0; i < ARRAY_SIZE(i915->mm.regions); i++) {
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struct intel_memory_region *region =
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fetch_and_zero(&i915->mm.regions[i]);
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if (region)
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intel_memory_region_put(region);
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}
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}
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#if IS_ENABLED(CONFIG_DRM_I915_SELFTEST)
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#include "selftests/intel_memory_region.c"
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#include "selftests/mock_region.c"
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#endif
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