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
83 lines
1.9 KiB
C
83 lines
1.9 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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#include "intel_memory_region.h"
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#include "i915_gem_region.h"
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#include "i915_drv.h"
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#include "i915_trace.h"
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void i915_gem_object_init_memory_region(struct drm_i915_gem_object *obj,
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struct intel_memory_region *mem)
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{
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obj->mm.region = intel_memory_region_get(mem);
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mutex_lock(&mem->objects.lock);
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list_add(&obj->mm.region_link, &mem->objects.list);
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mutex_unlock(&mem->objects.lock);
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}
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void i915_gem_object_release_memory_region(struct drm_i915_gem_object *obj)
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{
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struct intel_memory_region *mem = obj->mm.region;
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mutex_lock(&mem->objects.lock);
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list_del(&obj->mm.region_link);
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mutex_unlock(&mem->objects.lock);
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intel_memory_region_put(mem);
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}
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struct drm_i915_gem_object *
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i915_gem_object_create_region(struct intel_memory_region *mem,
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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 drm_i915_gem_object *obj;
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resource_size_t default_page_size;
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int err;
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/*
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* NB: Our use of resource_size_t for the size stems from using struct
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* resource for the mem->region. We might need to revisit this in the
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* future.
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*/
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GEM_BUG_ON(flags & ~I915_BO_ALLOC_FLAGS);
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if (!mem)
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return ERR_PTR(-ENODEV);
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default_page_size = mem->min_page_size;
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if (page_size)
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default_page_size = page_size;
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GEM_BUG_ON(!is_power_of_2_u64(default_page_size));
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GEM_BUG_ON(default_page_size < PAGE_SIZE);
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size = round_up(size, default_page_size);
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GEM_BUG_ON(!size);
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GEM_BUG_ON(!IS_ALIGNED(size, I915_GTT_MIN_ALIGNMENT));
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if (i915_gem_object_size_2big(size))
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return ERR_PTR(-E2BIG);
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obj = i915_gem_object_alloc();
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if (!obj)
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return ERR_PTR(-ENOMEM);
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err = mem->ops->init_object(mem, obj, size, page_size, flags);
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if (err)
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goto err_object_free;
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trace_i915_gem_object_create(obj);
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return obj;
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err_object_free:
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i915_gem_object_free(obj);
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return ERR_PTR(err);
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}
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