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git://nv-tegra.nvidia.com/linux-nv-oot.git
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872cead7b6
1. Update Host1x-Syncpt - add syncpt-list in syncpoint-pool structure. - add exported "host1x-syncpt-*" interface and supporting private interface. 2. Update Host1x-NvHost - add support for nvhost-syncpt and nvhost-client interface and supporting private interface. - falcon and pm interface not supported 3. Update Host1x-Fence - add exported "host1x-fence-*" interface and supporting private interface. 4. Add Host1x-Poll - Per Pool polling workequeue created - add poll supporting private interface. 5. Add new IOCTL Jira HOSTX-5514 Change-Id: I187fa7ed89a3479e51b79f9d8d438ede75e1a36a Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/3136834 Tested-by: Amitabh Dutta <amitabhd@nvidia.com> Reviewed-by: Bitan Biswas <bbiswas@nvidia.com> GVS: buildbot_gerritrpt <buildbot_gerritrpt@nvidia.com> Reviewed-by: Amitabh Dutta <amitabhd@nvidia.com>
72 lines
2.0 KiB
C
72 lines
2.0 KiB
C
/*
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* SPDX-FileCopyrightText: Copyright (c) 2024 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
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* SPDX-License-Identifier: GPL-2.0-only
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*/
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#include <linux/io.h>
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#include "../dev.h"
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#include "../syncpt.h"
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#define HOST1X_SYNC_SYNCPT(h, x) ((h) * (x))
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/*
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* Write the current syncpoint value back to hw.
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*/
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static void syncpt_restore(struct host1x_syncpt *sp)
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{
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u32 min = HOST1X_EMU_EXPORT_CALL(host1x_syncpt_read_min(sp));
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struct host1x *host = sp->host;
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host1x_sync_writel(host, min, HOST1X_SYNC_SYNCPT(host->syncpt_page_size, sp->id));
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}
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/*
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* Updates the last value read from hardware.
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*/
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static u32 syncpt_load(struct host1x_syncpt *sp)
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{
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u32 old, live;
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struct host1x *host = sp->host;
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/* Loop in case there's a race writing to min_val */
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do {
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old = HOST1X_EMU_EXPORT_CALL(host1x_syncpt_read_min(sp));
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live = host1x_sync_readl(host, HOST1X_SYNC_SYNCPT(host->syncpt_page_size, sp->id));
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} while ((u32)atomic_cmpxchg(&sp->min_val, old, live) != old);
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if (!host1x_syncpt_check_max(sp, live))
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dev_err(host->dev, "%s failed: id=%u, min=%d, max=%d\n",
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__func__, sp->id, HOST1X_EMU_EXPORT_CALL(host1x_syncpt_read_min(sp)),
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HOST1X_EMU_EXPORT_CALL(host1x_syncpt_read_max(sp)));
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return live;
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}
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/*
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* Write a cpu syncpoint increment to the hardware, without touching
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* the cache.
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*/
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static int syncpt_cpu_incr(struct host1x_syncpt *sp)
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{
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struct host1x *host = sp->host;
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u32 live;
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if (!host1x_syncpt_client_managed(sp) && host1x_syncpt_idle(sp)) {
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dev_err(host->dev, "%s failed: Syncpoint id=%u increment\n",
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__func__,sp->id);
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return -EINVAL;
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}
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live = host1x_sync_readl(host, HOST1X_SYNC_SYNCPT(host->syncpt_page_size, sp->id));
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host1x_sync_writel(host, (live + 1U),
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HOST1X_SYNC_SYNCPT(host->syncpt_page_size, sp->id));
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wmb();
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return 0;
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}
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static const struct host1x_syncpt_ops host1x_syncpt_ops = {
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.restore = syncpt_restore,
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.load = syncpt_load,
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.cpu_incr = syncpt_cpu_incr,
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};
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