vasilito
dc68054305
- Restore 29 recipe symlinks (libdrm, qtbase, dbus, sddm, pipewire, etc.) - Restore 33 patches (KDE, libdrm, mesa, pipewire, sddm, wireplumber) - Restore 20+ local/scripts (audit, lint, test, build helpers) - Restore src/cook/scheduler.rs, status.rs, gnu-config/ - Restore scripts/patch-inclusion-gate.sh, run_mini1.sh, validate-collision-log.sh - Recover TLC source from HEAD (was overwritten by 0.2.3 checkout) - Recover 11 local/docs plans from HEAD (were overwritten) - Recover qt6-wayland-smoke symlink from HEAD - Fix MOTD: remove garbled ASCII art, use clean text - Update version: 0.2.0 -> 0.2.4 in os-release, motd, config - Reduce filesystem_size: 1536 -> 512 MiB - Add ABSOLUTE RULE to AGENTS.md: never delete/ignore packages - Reduce pcid scheme log verbosity: info -> debug
131 lines
3.6 KiB
C
131 lines
3.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
|
|
/*
|
|
* fence-chain: chain fences together in a timeline
|
|
*
|
|
* Copyright (C) 2018 Advanced Micro Devices, Inc.
|
|
* Authors:
|
|
* Christian König <christian.koenig@amd.com>
|
|
*/
|
|
|
|
#ifndef __LINUX_DMA_FENCE_CHAIN_H
|
|
#define __LINUX_DMA_FENCE_CHAIN_H
|
|
|
|
#include <linux/dma-fence.h>
|
|
#include <linux/irq_work.h>
|
|
#include <linux/slab.h>
|
|
|
|
/**
|
|
* struct dma_fence_chain - fence to represent an node of a fence chain
|
|
* @base: fence base class
|
|
* @prev: previous fence of the chain
|
|
* @prev_seqno: original previous seqno before garbage collection
|
|
* @fence: encapsulated fence
|
|
* @lock: spinlock for fence handling
|
|
*/
|
|
struct dma_fence_chain {
|
|
struct dma_fence base;
|
|
struct dma_fence __rcu *prev;
|
|
u64 prev_seqno;
|
|
struct dma_fence *fence;
|
|
union {
|
|
/**
|
|
* @cb: callback for signaling
|
|
*
|
|
* This is used to add the callback for signaling the
|
|
* complection of the fence chain. Never used at the same time
|
|
* as the irq work.
|
|
*/
|
|
struct dma_fence_cb cb;
|
|
|
|
/**
|
|
* @work: irq work item for signaling
|
|
*
|
|
* Irq work structure to allow us to add the callback without
|
|
* running into lock inversion. Never used at the same time as
|
|
* the callback.
|
|
*/
|
|
struct irq_work work;
|
|
};
|
|
};
|
|
|
|
|
|
/**
|
|
* to_dma_fence_chain - cast a fence to a dma_fence_chain
|
|
* @fence: fence to cast to a dma_fence_array
|
|
*
|
|
* Returns NULL if the fence is not a dma_fence_chain,
|
|
* or the dma_fence_chain otherwise.
|
|
*/
|
|
static inline struct dma_fence_chain *
|
|
to_dma_fence_chain(struct dma_fence *fence)
|
|
{
|
|
if (!fence || !dma_fence_is_chain(fence))
|
|
return NULL;
|
|
|
|
return container_of(fence, struct dma_fence_chain, base);
|
|
}
|
|
|
|
/**
|
|
* dma_fence_chain_contained - return the contained fence
|
|
* @fence: the fence to test
|
|
*
|
|
* If the fence is a dma_fence_chain the function returns the fence contained
|
|
* inside the chain object, otherwise it returns the fence itself.
|
|
*/
|
|
static inline struct dma_fence *
|
|
dma_fence_chain_contained(struct dma_fence *fence)
|
|
{
|
|
struct dma_fence_chain *chain = to_dma_fence_chain(fence);
|
|
|
|
return chain ? chain->fence : fence;
|
|
}
|
|
|
|
/**
|
|
* dma_fence_chain_alloc
|
|
*
|
|
* Returns a new struct dma_fence_chain object or NULL on failure.
|
|
*
|
|
* This specialized allocator has to be a macro for its allocations to be
|
|
* accounted separately (to have a separate alloc_tag). The typecast is
|
|
* intentional to enforce typesafety.
|
|
*/
|
|
#define dma_fence_chain_alloc() \
|
|
kmalloc_obj(struct dma_fence_chain)
|
|
|
|
/**
|
|
* dma_fence_chain_free
|
|
* @chain: chain node to free
|
|
*
|
|
* Frees up an allocated but not used struct dma_fence_chain object. This
|
|
* doesn't need an RCU grace period since the fence was never initialized nor
|
|
* published. After dma_fence_chain_init() has been called the fence must be
|
|
* released by calling dma_fence_put(), and not through this function.
|
|
*/
|
|
static inline void dma_fence_chain_free(struct dma_fence_chain *chain)
|
|
{
|
|
kfree(chain);
|
|
};
|
|
|
|
/**
|
|
* dma_fence_chain_for_each - iterate over all fences in chain
|
|
* @iter: current fence
|
|
* @head: starting point
|
|
*
|
|
* Iterate over all fences in the chain. We keep a reference to the current
|
|
* fence while inside the loop which must be dropped when breaking out.
|
|
*
|
|
* For a deep dive iterator see dma_fence_unwrap_for_each().
|
|
*/
|
|
#define dma_fence_chain_for_each(iter, head) \
|
|
for (iter = dma_fence_get(head); iter; \
|
|
iter = dma_fence_chain_walk(iter))
|
|
|
|
struct dma_fence *dma_fence_chain_walk(struct dma_fence *fence);
|
|
int dma_fence_chain_find_seqno(struct dma_fence **pfence, uint64_t seqno);
|
|
void dma_fence_chain_init(struct dma_fence_chain *chain,
|
|
struct dma_fence *prev,
|
|
struct dma_fence *fence,
|
|
uint64_t seqno);
|
|
|
|
#endif /* __LINUX_DMA_FENCE_CHAIN_H */
|