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#define for_each_memory_region(mr, i915, id) \
  51        for (id = 0; id < ARRAY_SIZE((i915)->mm.regions); id++) \
  52                for_each_if((mr) = (i915)->mm.regions[id])
  53
  54/**
  55 * Memory regions encoded as type | instance
  56 */
  57extern const u32 intel_region_map[];
  58
  59struct intel_memory_region_ops {
  60        unsigned int flags;
  61
  62        int (*init)(struct intel_memory_region *mem);
  63        void (*release)(struct intel_memory_region *mem);
  64
  65        struct drm_i915_gem_object *
  66        (*create_object)(struct intel_memory_region *mem,
  67                         resource_size_t size,
  68                         unsigned int flags);
  69};
  70
  71struct intel_memory_region {
  72        struct drm_i915_private *i915;
  73
  74        const struct intel_memory_region_ops *ops;
  75
  76        struct io_mapping iomap;
  77        struct resource region;
  78
  79        /* For fake LMEM */
  80        struct drm_mm_node fake_mappable;
  81
  82        struct i915_buddy_mm mm;
  83        struct mutex mm_lock;
  84
  85        struct kref kref;
  86
  87        resource_size_t io_start;
  88        resource_size_t min_page_size;
  89        resource_size_t total;
  90        resource_size_t avail;
  91
  92        unsigned int type;
  93        unsigned int instance;
  94        unsigned int id;
  95        char name[8];
  96
  97        dma_addr_t remap_addr;
  98
  99        struct {
 100                struct mutex lock; /* Protects access to objects */
 101                struct list_head list;
 102                struct list_head purgeable;
 103        } objects;
 104};
 105
 106int intel_memory_region_init_buddy(struct intel_memory_region *mem);
 107void intel_memory_region_release_buddy(struct intel_memory_region *mem);
 108
 109int __intel_memory_region_get_pages_buddy(struct intel_memory_region *mem,
 110                                          resource_size_t size,
 111                                          unsigned int flags,
 112                                          struct list_head *blocks);
 113struct i915_buddy_block *
 114__intel_memory_region_get_block_buddy(struct intel_memory_region *mem,
 115                                      resource_size_t size,
 116                                      unsigned int flags);
 117void __intel_memory_region_put_pages_buddy(struct intel_memory_region *mem,
 118                                           struct list_head *blocks);
 119void __intel_memory_region_put_block_buddy(struct i915_buddy_block *block);
 120
 121struct intel_memory_region *
 122intel_memory_region_create(struct drm_i915_private *i915,
 123                           resource_size_t start,
 124                           resource_size_t size,
 125                           resource_size_t min_page_size,
 126                           resource_size_t io_start,
 127                           const struct intel_memory_region_ops *ops);
 128
 129struct intel_memory_region *
 130intel_memory_region_get(struct intel_memory_region *mem);
 131void intel_memory_region_put(struct intel_memory_region *mem);
 132
 133int intel_memory_regions_hw_probe(struct drm_i915_private *i915);
 134void intel_memory_regions_driver_release(struct drm_i915_private *i915);
 135struct intel_memory_region *
 136intel_memory_region_by_type(struct drm_i915_private *i915,
 137                            enum intel_memory_type mem_type);
 138
 139__printf(2, 3) void
 140intel_memory_region_set_name(struct intel_memory_region *mem,
 141                             const char *fmt, ...);
 142
 143#endif
 144