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ba110db8e1
Move the DRM buddy allocator one level up so that it can be used by GPU drivers (example, nova-core) that have usecases other than DRM (such as VFIO vGPU support). Modify the API, structures and Kconfigs to use "gpu_buddy" terminology. Adapt the drivers and tests to use the new API. The commit cannot be split due to bisectability, however no functional change is intended. Verified by running K-UNIT tests and build tested various configurations. Signed-off-by: Joel Fernandes <joelagnelf@nvidia.com> Reviewed-by: Dave Airlie <airlied@redhat.com> [airlied: I've split this into two so git can find copies easier. I've also just nuked drm_random library, that stuff needs to be done elsewhere and only the buddy tests seem to be using it]. Signed-off-by: Dave Airlie <airlied@redhat.com>
78 lines
1.8 KiB
C
78 lines
1.8 KiB
C
// SPDX-License-Identifier: MIT
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/*
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* Copyright © 2021 Intel Corporation
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*/
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#include <kunit/test-bug.h>
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#include <linux/export.h>
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#include <linux/kmemleak.h>
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#include <linux/module.h>
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#include <linux/sizes.h>
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#include <linux/gpu_buddy.h>
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#include <drm/drm_buddy.h>
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#include <drm/drm_print.h>
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/**
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* drm_buddy_block_print - print block information
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*
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* @mm: DRM buddy manager
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* @block: DRM buddy block
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* @p: DRM printer to use
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*/
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void drm_buddy_block_print(struct gpu_buddy *mm,
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struct gpu_buddy_block *block,
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struct drm_printer *p)
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{
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u64 start = gpu_buddy_block_offset(block);
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u64 size = gpu_buddy_block_size(mm, block);
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drm_printf(p, "%#018llx-%#018llx: %llu\n", start, start + size, size);
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}
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EXPORT_SYMBOL(drm_buddy_block_print);
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/**
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* drm_buddy_print - print allocator state
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*
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* @mm: DRM buddy manager
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* @p: DRM printer to use
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*/
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void drm_buddy_print(struct gpu_buddy *mm, struct drm_printer *p)
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{
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int order;
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drm_printf(p, "chunk_size: %lluKiB, total: %lluMiB, free: %lluMiB, clear_free: %lluMiB\n",
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mm->chunk_size >> 10, mm->size >> 20, mm->avail >> 20, mm->clear_avail >> 20);
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for (order = mm->max_order; order >= 0; order--) {
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struct gpu_buddy_block *block, *tmp;
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struct rb_root *root;
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u64 count = 0, free;
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unsigned int tree;
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for_each_free_tree(tree) {
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root = &mm->free_trees[tree][order];
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rbtree_postorder_for_each_entry_safe(block, tmp, root, rb) {
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BUG_ON(!gpu_buddy_block_is_free(block));
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count++;
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}
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}
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drm_printf(p, "order-%2d ", order);
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free = count * (mm->chunk_size << order);
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if (free < SZ_1M)
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drm_printf(p, "free: %8llu KiB", free >> 10);
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else
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drm_printf(p, "free: %8llu MiB", free >> 20);
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drm_printf(p, ", blocks: %llu\n", count);
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}
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}
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EXPORT_SYMBOL(drm_buddy_print);
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MODULE_DESCRIPTION("DRM-specific GPU Buddy Allocator Print Helpers");
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MODULE_LICENSE("Dual MIT/GPL");
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