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d22632c83b
For some specialised objects we might need something larger than the
regions min_page_size due to some hw restriction, and slightly more
hairy is needing something smaller with the guarantee that such objects
will never be inserted into any GTT, which is the case for the paging
structures.
This also fixes how we setup the BO page_alignment, if we later migrate
the object somewhere else. For example if the placements are {SMEM,
LMEM}, then we might get this wrong. Pushing the min_page_size behaviour
into the manager should fix this.
v2(Thomas): push the default page size behaviour into buddy_man, and let
the user override it with the page-alignment, which looks cleaner
v3: rebase on ttm sys changes
Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Cc: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Reviewed-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210625103824.558481-1-matthew.auld@intel.com
137 lines
3.4 KiB
C
137 lines
3.4 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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#ifndef __INTEL_MEMORY_REGION_H__
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#define __INTEL_MEMORY_REGION_H__
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#include <linux/kref.h>
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#include <linux/ioport.h>
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#include <linux/mutex.h>
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#include <linux/io-mapping.h>
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#include <drm/drm_mm.h>
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#include <drm/i915_drm.h>
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struct drm_i915_private;
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struct drm_i915_gem_object;
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struct intel_memory_region;
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struct sg_table;
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struct ttm_resource;
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enum intel_memory_type {
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INTEL_MEMORY_SYSTEM = I915_MEMORY_CLASS_SYSTEM,
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INTEL_MEMORY_LOCAL = I915_MEMORY_CLASS_DEVICE,
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INTEL_MEMORY_STOLEN_SYSTEM,
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INTEL_MEMORY_STOLEN_LOCAL,
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INTEL_MEMORY_MOCK,
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};
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enum intel_region_id {
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INTEL_REGION_SMEM = 0,
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INTEL_REGION_LMEM,
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INTEL_REGION_STOLEN_SMEM,
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INTEL_REGION_STOLEN_LMEM,
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INTEL_REGION_UNKNOWN, /* Should be last */
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};
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#define REGION_SMEM BIT(INTEL_REGION_SMEM)
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#define REGION_LMEM BIT(INTEL_REGION_LMEM)
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#define REGION_STOLEN_SMEM BIT(INTEL_REGION_STOLEN_SMEM)
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#define REGION_STOLEN_LMEM BIT(INTEL_REGION_STOLEN_LMEM)
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#define I915_ALLOC_CONTIGUOUS BIT(0)
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#define for_each_memory_region(mr, i915, id) \
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for (id = 0; id < ARRAY_SIZE((i915)->mm.regions); id++) \
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for_each_if((mr) = (i915)->mm.regions[id])
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struct intel_memory_region_ops {
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unsigned int flags;
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int (*init)(struct intel_memory_region *mem);
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void (*release)(struct intel_memory_region *mem);
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int (*init_object)(struct intel_memory_region *mem,
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struct drm_i915_gem_object *obj,
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resource_size_t size,
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resource_size_t page_size,
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unsigned int flags);
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};
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struct intel_memory_region {
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struct drm_i915_private *i915;
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const struct intel_memory_region_ops *ops;
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struct io_mapping iomap;
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struct resource region;
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/* For fake LMEM */
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struct drm_mm_node fake_mappable;
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struct kref kref;
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resource_size_t io_start;
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resource_size_t min_page_size;
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resource_size_t total;
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resource_size_t avail;
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u16 type;
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u16 instance;
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enum intel_region_id id;
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char name[16];
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bool private; /* not for userspace */
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dma_addr_t remap_addr;
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struct {
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struct mutex lock; /* Protects access to objects */
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struct list_head list;
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} objects;
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bool is_range_manager;
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void *region_private;
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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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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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struct intel_memory_region *
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intel_memory_region_get(struct intel_memory_region *mem);
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void intel_memory_region_put(struct intel_memory_region *mem);
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int intel_memory_regions_hw_probe(struct drm_i915_private *i915);
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void intel_memory_regions_driver_release(struct drm_i915_private *i915);
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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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__printf(2, 3) void
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intel_memory_region_set_name(struct intel_memory_region *mem,
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const char *fmt, ...);
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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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struct intel_memory_region *
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i915_gem_ttm_system_setup(struct drm_i915_private *i915,
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u16 type, u16 instance);
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struct intel_memory_region *
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i915_gem_shmem_setup(struct drm_i915_private *i915,
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u16 type, u16 instance);
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#endif
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