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0995c2fc39
Prevent application hangs caused by out-of-order fence signaling when user fences are attached. Use drm_syncobj (via dma-fence-chain) to guarantee that each user fence signals in order, regardless of the signaling order of the attached fences. Ensure user fence writebacks to user space occur in the correct sequence. v7: - Skip drm_syncbj create of error (CI) Fixes:dd08ebf6c3("drm/xe: Introduce a new DRM driver for Intel GPUs") Signed-off-by: Matthew Brost <matthew.brost@intel.com> Reviewed-by: Thomas Hellström <thomas.hellstrom@linux.intel.com> Link: https://patch.msgid.link/20251031234050.3043507-2-matthew.brost@intel.com (cherry picked from commitadda4e855a) Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
48 lines
1.3 KiB
C
48 lines
1.3 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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#ifndef _XE_SYNC_H_
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#define _XE_SYNC_H_
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#include "xe_sync_types.h"
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struct drm_syncobj;
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struct xe_device;
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struct xe_exec_queue;
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struct xe_file;
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struct xe_sched_job;
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struct xe_vm;
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#define SYNC_PARSE_FLAG_EXEC BIT(0)
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#define SYNC_PARSE_FLAG_LR_MODE BIT(1)
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#define SYNC_PARSE_FLAG_DISALLOW_USER_FENCE BIT(2)
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int xe_sync_entry_parse(struct xe_device *xe, struct xe_file *xef,
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struct xe_sync_entry *sync,
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struct drm_xe_sync __user *sync_user,
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struct drm_syncobj *ufence_syncobj,
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u64 ufence_timeline_value,
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unsigned int flags);
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int xe_sync_entry_add_deps(struct xe_sync_entry *sync,
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struct xe_sched_job *job);
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void xe_sync_entry_signal(struct xe_sync_entry *sync,
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struct dma_fence *fence);
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void xe_sync_entry_cleanup(struct xe_sync_entry *sync);
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struct dma_fence *
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xe_sync_in_fence_get(struct xe_sync_entry *sync, int num_sync,
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struct xe_exec_queue *q, struct xe_vm *vm);
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static inline bool xe_sync_is_ufence(struct xe_sync_entry *sync)
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{
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return !!sync->ufence;
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}
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struct xe_user_fence *__xe_sync_ufence_get(struct xe_user_fence *ufence);
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struct xe_user_fence *xe_sync_ufence_get(struct xe_sync_entry *sync);
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void xe_sync_ufence_put(struct xe_user_fence *ufence);
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int xe_sync_ufence_get_status(struct xe_user_fence *ufence);
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#endif
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