drivers/gpu/drm/i915/intel_memory_region.h

   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
  17 struct drm_i915_private;
  18 struct drm_i915_gem_object;
  19 struct intel_memory_region;
  20 struct sg_table;
  21
  22 /**
  23  *  Base memory type
  24  */
  25 enum intel_memory_type {
  26         INTEL_MEMORY_SYSTEM = 0,
  27         INTEL_MEMORY_LOCAL,
  28         INTEL_MEMORY_STOLEN,
  29 };
  30
  31 enum 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  */
  57 extern const u32 intel_region_map[];
  58
  59 struct 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
  71 struct 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
 106 int intel_memory_region_init_buddy(struct intel_memory_region *mem);
 107 void intel_memory_region_release_buddy(struct intel_memory_region *mem);
 108
 109 int __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);
 113 struct i915_buddy_block *
 114 __intel_memory_region_get_block_buddy(struct intel_memory_region *mem,
 115                                       resource_size_t size,
 116                                       unsigned int flags);
 117 void __intel_memory_region_put_pages_buddy(struct intel_memory_region *mem,
 118                                            struct list_head *blocks);
 119 void __intel_memory_region_put_block_buddy(struct i915_buddy_block *block);
 120
 121 struct intel_memory_region *
 122 intel_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
 129 struct intel_memory_region *
 130 intel_memory_region_get(struct intel_memory_region *mem);
 131 void intel_memory_region_put(struct intel_memory_region *mem);
 132
 133 int intel_memory_regions_hw_probe(struct drm_i915_private *i915);
 134 void intel_memory_regions_driver_release(struct drm_i915_private *i915);
 135 struct intel_memory_region *
 136 intel_memory_region_by_type(struct drm_i915_private *i915,
 137                             enum intel_memory_type mem_type);
 138
 139 __printf(2, 3) void
 140 intel_memory_region_set_name(struct intel_memory_region *mem,
 141                              const char *fmt, ...);
 142
 143 #endif