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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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Tejas UpadhyayandArunpravin Paneer Selvam
35b535db69
gpu_buddy APIs are expected to be called with the driver-provided lock held, but there is no runtime enforcement of this contract. Add lockdep annotations to catch locking violations early. Introduce gpu_buddy_driver_set_lock() for the driver to register the lock that protects the buddy manager. Add gpu_buddy_driver_lock_held() assertions to all exported gpu_buddy and drm_buddy APIs that access/modify the manager state. The lock_dep_map field is only compiled in when CONFIG_LOCKDEP is enabled, adding zero overhead to production builds. Wire up xe_ttm_vram_mgr to register its mutex with the buddy manager after initialization. Assisted-by: Copilot:claude-opus-4.6 Suggested-by: Matthew Brost <matthew.brost@intel.com> Signed-off-by: Tejas Upadhyay <tejas.upadhyay@intel.com> Reviewed-by: Matthew Auld <matthew.auld@intel.com> Signed-off-by: Arunpravin Paneer Selvam <Arunpravin.PaneerSelvam@amd.com> Link: https://patch.msgid.link/20260508065544.4049240-2-tejas.upadhyay@intel.com
79 lines
1.9 KiB
C
79 lines
1.9 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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gpu_buddy_driver_lock_held(mm);
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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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