LXR linux/drivers/gpu/drm/i915/intel_memory

   1/* SPDX-License-Identifier: MIT */
   2/*
   3 * Copyright © 2019 Intel Corporation
   4 */
   5
   6#ifndef __INTEL_MEMORY_REGION_H__
   7#define __INTEL_MEMORY_REGION_H__
   8
   9#include <linux/kref.h>
  10#include <linux/ioport.h>
  11#include <linux/mutex.h>
  12#include <linux/io-mapping.h>
  13#include <drm/drm_mm.h>
  14
  15#include "i915_buddy.h"
  16
  17struct drm_i915_private;
  18struct drm_i915_gem_object;
  19struct intel_memory_region;
  20struct sg_table;
  21
  22/**
  23 *  Base memory type
  24 */
  25enum intel_memory_type {
  26        INTEL_MEMORY_SYSTEM = 0,
  27        INTEL_MEMORY_LOCAL,
  28        INTEL_MEMORY_STOLEN,
  29};
  30
  31enum intel_region_id {
  32        INTEL_REGION_SMEM = 0,
  33        INTEL_REGION_LMEM,
  34        INTEL_REGION_STOLEN,
  35        INTEL_REGION_UNKNOWN, /* Should be last */
  36};
  37
  38#define REGION_SMEM     BIT(INTEL_REGION_SMEM)
  39#define REGION_LMEM     BIT(INTEL_REGION_LMEM)
  40#define REGION_STOLEN   BIT(INTEL_REGION_STOLEN)
  41
  42#define INTEL_MEMORY_TYPE_SHIFT 16
  43
  44#define MEMORY_TYPE_FROM_REGION(r) (ilog2((r) >> INTEL_MEMORY_TYPE_SHIFT))
  45#define MEMORY_INSTANCE_FROM_REGION(r) (ilog2((r) & 0xffff))
  46
  47#define I915_ALLOC_MIN_PAGE_SIZE  BIT(0)
  48#define I915_ALLOC_CONTIGUOUS     BIT(1)
  49
  50/**
  51 * Memory regions encoded as type | instance
  52 */
  53extern const u32 intel_region_map[];
  54
  55struct intel_memory_region_ops {
  56        unsigned int flags;
  57
  58        int (*init)(struct intel_memory_region *mem);
  59        void (*release)(struct intel_memory_region *mem);
  60
  61        struct drm_i915_gem_object *
  62        (*create_object)(struct intel_memory_region *mem,
  63                         resource_size_t size,
  64                         unsigned int flags);
  65};
  66
  67struct intel_memory_region {
  68        struct drm_i915_private *i915;
  69
  70        const struct intel_memory_region_ops *ops;
  71
  72        struct io_mapping iomap;
  73        struct resource region;
  74
  75        /* For fake LMEM */
  76        struct drm_mm_node fake_mappable;
  77
  78        struct i915_buddy_mm mm;
  79        struct mutex mm_lock;
  80
  81        struct kref kref;
  82
  83        resource_size_t io_start;
  84        resource_size_t min_page_size;
  85
  86        unsigned int type;
  87        unsigned int instance;
  88        unsigned int id;
  89
  90        dma_addr_t remap_addr;
  91
  92        struct {
  93                struct mutex lock; /* Protects access to objects */
  94                struct list_head list;
  95                struct list_head purgeable;
  96        } objects;
  97};
  98
  99int intel_memory_region_init_buddy(struct intel_memory_region *mem);
 100void intel_memory_region_release_buddy(struct intel_memory_region *mem);
 101
 102int __intel_memory_region_get_pages_buddy(struct intel_memory_region *mem,
 103                                          resource_size_t size,
 104                                          unsigned int flags,
 105                                          struct list_head *blocks);
 106struct i915_buddy_block *
 107__intel_memory_region_get_block_buddy(struct intel_memory_region *mem,
 108                                      resource_size_t size,
 109                                      unsigned int flags);
 110void __intel_memory_region_put_pages_buddy(struct intel_memory_region *mem,
 111                                           struct list_head *blocks);
 112void __intel_memory_region_put_block_buddy(struct i915_buddy_block *block);
 113
 114struct intel_memory_region *
 115intel_memory_region_create(struct drm_i915_private *i915,
 116                           resource_size_t start,
 117                           resource_size_t size,
 118                           resource_size_t min_page_size,
 119                           resource_size_t io_start,
 120                           const struct intel_memory_region_ops *ops);
 121
 122struct intel_memory_region *
 123intel_memory_region_get(struct intel_memory_region *mem);
 124void intel_memory_region_put(struct intel_memory_region *mem);
 125
 126int intel_memory_regions_hw_probe(struct drm_i915_private *i915);
 127void intel_memory_regions_driver_release(struct drm_i915_private *i915);
 128
 129#endif
 130