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host1x_emu: SyncpointIncre per-improvement

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1. Add mechanism(s) to trigger syncpoint fence scan when
syncpoint increment UMD called. Following methods are added.
 - METHOD-1: Check fence expire in user context when syncpoint
   increment  UMD API is  called.
 - METHOD-2: Add tasklet based mechanism that schedule tasklet to scan for
   syncpoint fence expiry. This also improve signaling latency.

   METHOD-1 is enabled by default, to enable METHOD-2 define MACRO
   "HOST1X_EMU_SYNC_INC_TASKLET".

2. Add interface "host1x_syncpt_fence_scan()" that can be called from
   client interrupt handler to initiate syncpoint fence scan.

Jira HOSTX-5527

Change-Id: I4d5a0ba9fd67042d824a1df2794b316831001dc4
Signed-off-by: amitabhd <amitabhd@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/3267144
Reviewed-by: Raghavendra Vishnu Kumar <rvk@nvidia.com>
Reviewed-by: Sanif Veeras <sveeras@nvidia.com>
GVS: buildbot_gerritrpt <buildbot_gerritrpt@nvidia.com>
Reviewed-by: Leslin Varghese <lvarghese@nvidia.com>
This commit is contained in:
amitabhd
2024-12-12 18:03:55 +00:00
committed by Jon Hunter
parent 676ada0f2b
commit a2dba7e53b
7 changed files with 88 additions and 48 deletions
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8
drivers/gpu/host1x-emu/include/linux/host1x-emu.h
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@@ -1,7 +1,5 @@
/*
* SPDX-FileCopyrightText: Copyright (c) 2024 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
* SPDX-License-Identifier: GPL-2.0-only
*/
// SPDX-License-Identifier: GPL-2.0-only
// SPDX-FileCopyrightText: Copyright (c) 2024-2025 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
#ifndef __LINUX_HOST1X_H
#define __LINUX_HOST1X_H
@@ -61,6 +59,8 @@ HOST1X_EMU_EXPORT_DECL(int, host1x_syncpt_incr(struct host1x_syncpt *sp));
HOST1X_EMU_EXPORT_DECL(u32, host1x_syncpt_incr_max(struct host1x_syncpt *sp,
u32 incrs));
HOST1X_EMU_EXPORT_DECL(void, host1x_syncpt_fence_scan(struct host1x_syncpt *sp));
HOST1X_EMU_EXPORT_DECL(int, host1x_syncpt_wait_ts(struct host1x_syncpt *sp,
u32 thresh, long timeout, u32 *value, ktime_t *ts));