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f54d186700
I plan to usurp the short name of struct fence for a core kernel struct, and so I need to rename the specialised fence/timeline for DMA operations to make room. A consensus was reached in https://lists.freedesktop.org/archives/dri-devel/2016-July/113083.html that making clear this fence applies to DMA operations was a good thing. Since then the patch has grown a bit as usage increases, so hopefully it remains a good thing! (v2...: rebase, rerun spatch) v3: Compile on msm, spotted a manual fixup that I broke. v4: Try again for msm, sorry Daniel coccinelle script: @@ @@ - struct fence + struct dma_fence @@ @@ - struct fence_ops + struct dma_fence_ops @@ @@ - struct fence_cb + struct dma_fence_cb @@ @@ - struct fence_array + struct dma_fence_array @@ @@ - enum fence_flag_bits + enum dma_fence_flag_bits @@ @@ ( - fence_init + dma_fence_init | - fence_release + dma_fence_release | - fence_free + dma_fence_free | - fence_get + dma_fence_get | - fence_get_rcu + dma_fence_get_rcu | - fence_put + dma_fence_put | - fence_signal + dma_fence_signal | - fence_signal_locked + dma_fence_signal_locked | - fence_default_wait + dma_fence_default_wait | - fence_add_callback + dma_fence_add_callback | - fence_remove_callback + dma_fence_remove_callback | - fence_enable_sw_signaling + dma_fence_enable_sw_signaling | - fence_is_signaled_locked + dma_fence_is_signaled_locked | - fence_is_signaled + dma_fence_is_signaled | - fence_is_later + dma_fence_is_later | - fence_later + dma_fence_later | - fence_wait_timeout + dma_fence_wait_timeout | - fence_wait_any_timeout + dma_fence_wait_any_timeout | - fence_wait + dma_fence_wait | - fence_context_alloc + dma_fence_context_alloc | - fence_array_create + dma_fence_array_create | - to_fence_array + to_dma_fence_array | - fence_is_array + dma_fence_is_array | - trace_fence_emit + trace_dma_fence_emit | - FENCE_TRACE + DMA_FENCE_TRACE | - FENCE_WARN + DMA_FENCE_WARN | - FENCE_ERR + DMA_FENCE_ERR ) ( ... ) Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Reviewed-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk> Acked-by: Sumit Semwal <sumit.semwal@linaro.org> Acked-by: Christian König <christian.koenig@amd.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: http://patchwork.freedesktop.org/patch/msgid/20161025120045.28839-1-chris@chris-wilson.co.uk
119 lines
4.3 KiB
C
119 lines
4.3 KiB
C
/**************************************************************************
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*
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* Copyright (c) 2006-2009 VMware, Inc., Palo Alto, CA., USA
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sub license, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial portions
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* of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
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* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
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* USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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**************************************************************************/
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/*
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* Authors: Thomas Hellstrom <thellstrom-at-vmware-dot-com>
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*/
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#ifndef _TTM_EXECBUF_UTIL_H_
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#define _TTM_EXECBUF_UTIL_H_
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#include <ttm/ttm_bo_api.h>
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#include <linux/list.h>
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/**
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* struct ttm_validate_buffer
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*
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* @head: list head for thread-private list.
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* @bo: refcounted buffer object pointer.
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* @shared: should the fence be added shared?
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*/
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struct ttm_validate_buffer {
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struct list_head head;
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struct ttm_buffer_object *bo;
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bool shared;
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};
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/**
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* function ttm_eu_backoff_reservation
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*
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* @ticket: ww_acquire_ctx from reserve call
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* @list: thread private list of ttm_validate_buffer structs.
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*
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* Undoes all buffer validation reservations for bos pointed to by
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* the list entries.
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*/
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extern void ttm_eu_backoff_reservation(struct ww_acquire_ctx *ticket,
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struct list_head *list);
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/**
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* function ttm_eu_reserve_buffers
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*
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* @ticket: [out] ww_acquire_ctx filled in by call, or NULL if only
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* non-blocking reserves should be tried.
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* @list: thread private list of ttm_validate_buffer structs.
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* @intr: should the wait be interruptible
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* @dups: [out] optional list of duplicates.
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*
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* Tries to reserve bos pointed to by the list entries for validation.
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* If the function returns 0, all buffers are marked as "unfenced",
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* taken off the lru lists and are not synced for write CPU usage.
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*
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* If the function detects a deadlock due to multiple threads trying to
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* reserve the same buffers in reverse order, all threads except one will
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* back off and retry. This function may sleep while waiting for
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* CPU write reservations to be cleared, and for other threads to
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* unreserve their buffers.
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*
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* If intr is set to true, this function may return -ERESTARTSYS if the
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* calling process receives a signal while waiting. In that case, no
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* buffers on the list will be reserved upon return.
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*
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* If dups is non NULL all buffers already reserved by the current thread
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* (e.g. duplicates) are added to this list, otherwise -EALREADY is returned
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* on the first already reserved buffer and all buffers from the list are
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* unreserved again.
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*
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* Buffers reserved by this function should be unreserved by
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* a call to either ttm_eu_backoff_reservation() or
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* ttm_eu_fence_buffer_objects() when command submission is complete or
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* has failed.
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*/
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extern int ttm_eu_reserve_buffers(struct ww_acquire_ctx *ticket,
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struct list_head *list, bool intr,
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struct list_head *dups);
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/**
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* function ttm_eu_fence_buffer_objects.
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*
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* @ticket: ww_acquire_ctx from reserve call
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* @list: thread private list of ttm_validate_buffer structs.
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* @fence: The new exclusive fence for the buffers.
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*
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* This function should be called when command submission is complete, and
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* it will add a new sync object to bos pointed to by entries on @list.
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* It also unreserves all buffers, putting them on lru lists.
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*
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*/
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extern void ttm_eu_fence_buffer_objects(struct ww_acquire_ctx *ticket,
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struct list_head *list,
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struct dma_fence *fence);
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#endif
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