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8b1f7f92e5
There is an interesting refcounting loop: struct intel_memory_region has a struct ttm_resource_manager, ttm_resource_manager->move may hold a reference to i915_request, i915_request may hold a reference to intel_context, intel_context may hold a reference to drm_i915_gem_object, drm_i915_gem_object may hold a reference to intel_memory_region. Break this loop by dropping region reference counting. In addition, Have regions with a manager moving fence make sure that all region objects are released before freeing the region. v6: - Fix a code comment. Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com> Reviewed-by: Matthew Auld <matthew.auld@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20211122214554.371864-4-thomas.hellstrom@linux.intel.com
136 lines
3.4 KiB
C
136 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/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 drm_printer;
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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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int (*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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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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void intel_memory_region_destroy(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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void intel_memory_region_debug(struct intel_memory_region *mr,
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struct drm_printer *printer);
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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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