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/ioport.h>
  10 #include <linux/mutex.h>
  11 #include <linux/io-mapping.h>
  12 #include <drm/drm_mm.h>
  13 #include <drm/i915_drm.h>
  14
  15 struct drm_i915_private;
  16 struct drm_i915_gem_object;
  17 struct drm_printer;
  18 struct intel_memory_region;
  19 struct sg_table;
  20 struct ttm_resource;
  21
  22 enum intel_memory_type {
  23         INTEL_MEMORY_SYSTEM = I915_MEMORY_CLASS_SYSTEM,
  24         INTEL_MEMORY_LOCAL = I915_MEMORY_CLASS_DEVICE,
  25         INTEL_MEMORY_STOLEN_SYSTEM,
  26         INTEL_MEMORY_STOLEN_LOCAL,
  27         INTEL_MEMORY_MOCK,
  28 };
  29
  30 enum intel_region_id {
  31         INTEL_REGION_SMEM = 0,
  32         INTEL_REGION_LMEM,
  33         INTEL_REGION_STOLEN_SMEM,
  34         INTEL_REGION_STOLEN_LMEM,
  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_SMEM   BIT(INTEL_REGION_STOLEN_SMEM)
  41 #define REGION_STOLEN_LMEM   BIT(INTEL_REGION_STOLEN_LMEM)
  42
  43 #define I915_ALLOC_CONTIGUOUS     BIT(0)
  44
  45 #define for_each_memory_region(mr, i915, id) \
  46         for (id = 0; id < ARRAY_SIZE((i915)->mm.regions); id++) \
  47                 for_each_if((mr) = (i915)->mm.regions[id])
  48
  49 struct intel_memory_region_ops {
  50         unsigned int flags;
  51
  52         int (*init)(struct intel_memory_region *mem);
  53         int (*release)(struct intel_memory_region *mem);
  54
  55         int (*init_object)(struct intel_memory_region *mem,
  56                            struct drm_i915_gem_object *obj,
  57                            resource_size_t size,
  58                            resource_size_t page_size,
  59                            unsigned int flags);
  60 };
  61
  62 struct intel_memory_region {
  63         struct drm_i915_private *i915;
  64
  65         const struct intel_memory_region_ops *ops;
  66
  67         struct io_mapping iomap;
  68         struct resource region;
  69
  70         /* For fake LMEM */
  71         struct drm_mm_node fake_mappable;
  72
  73         resource_size_t io_start;
  74         resource_size_t min_page_size;
  75         resource_size_t total;
  76         resource_size_t avail;
  77
  78         u16 type;
  79         u16 instance;
  80         enum intel_region_id id;
  81         char name[16];
  82         bool private; /* not for userspace */
  83
  84         dma_addr_t remap_addr;
  85
  86         struct {
  87                 struct mutex lock; /* Protects access to objects */
  88                 struct list_head list;
  89         } objects;
  90
  91         bool is_range_manager;
  92
  93         void *region_private;
  94 };
  95
  96 struct intel_memory_region *
  97 intel_memory_region_lookup(struct drm_i915_private *i915,
  98                            u16 class, u16 instance);
  99
 100 struct intel_memory_region *
 101 intel_memory_region_create(struct drm_i915_private *i915,
 102                            resource_size_t start,
 103                            resource_size_t size,
 104                            resource_size_t min_page_size,
 105                            resource_size_t io_start,
 106                            u16 type,
 107                            u16 instance,
 108                            const struct intel_memory_region_ops *ops);
 109
 110 void intel_memory_region_destroy(struct intel_memory_region *mem);
 111
 112 int intel_memory_regions_hw_probe(struct drm_i915_private *i915);
 113 void intel_memory_regions_driver_release(struct drm_i915_private *i915);
 114 struct intel_memory_region *
 115 intel_memory_region_by_type(struct drm_i915_private *i915,
 116                             enum intel_memory_type mem_type);
 117
 118 __printf(2, 3) void
 119 intel_memory_region_set_name(struct intel_memory_region *mem,
 120                              const char *fmt, ...);
 121
 122 int intel_memory_region_reserve(struct intel_memory_region *mem,
 123                                 resource_size_t offset,
 124                                 resource_size_t size);
 125
 126 void intel_memory_region_debug(struct intel_memory_region *mr,
 127                                struct drm_printer *printer);
 128
 129 struct intel_memory_region *
 130 i915_gem_ttm_system_setup(struct drm_i915_private *i915,
 131                           u16 type, u16 instance);
 132 struct intel_memory_region *
 133 i915_gem_shmem_setup(struct drm_i915_private *i915,
 134                      u16 type, u16 instance);
 135
 136 #endif