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/*
* Copyright (c) 2014-2016, NVIDIA CORPORATION. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*/
#include "fence_gk20a.h"
#include <linux/gk20a.h>
#include <linux/file.h>
#include <linux/version.h>
#include "gk20a.h"
#include "semaphore_gk20a.h"
#include "channel_gk20a.h"
#include "sync_gk20a.h"
#ifdef CONFIG_SYNC
#include "../drivers/staging/android/sync.h"
#endif
#ifdef CONFIG_TEGRA_GK20A
#include <linux/nvhost.h>
#include <linux/nvhost_ioctl.h>
#endif
struct gk20a_fence_ops {
int (*wait)(struct gk20a_fence *, long timeout);
bool (*is_expired)(struct gk20a_fence *);
void *(*free)(struct kref *);
};
static void gk20a_fence_free(struct kref *ref)
{
struct gk20a_fence *f =
container_of(ref, struct gk20a_fence, ref);
#ifdef CONFIG_SYNC
if (f->sync_fence)
sync_fence_put(f->sync_fence);
#endif
if (f->semaphore)
gk20a_semaphore_put(f->semaphore);
kfree(f);
}
void gk20a_fence_put(struct gk20a_fence *f)
{
if (f)
kref_put(&f->ref, gk20a_fence_free);
}
struct gk20a_fence *gk20a_fence_get(struct gk20a_fence *f)
{
if (f)
kref_get(&f->ref);
return f;
}
int gk20a_fence_wait(struct gk20a_fence *f, int timeout)
{
if (!tegra_platform_is_silicon())
timeout = (u32)MAX_SCHEDULE_TIMEOUT;
return f->ops->wait(f, timeout);
}
bool gk20a_fence_is_expired(struct gk20a_fence *f)
{
if (f && f->ops)
return f->ops->is_expired(f);
else
return true;
}
int gk20a_fence_install_fd(struct gk20a_fence *f)
{
#ifdef CONFIG_SYNC
int fd;
if (!f->sync_fence)
return -EINVAL;
fd = get_unused_fd_flags(O_RDWR);
if (fd < 0)
return fd;
sync_fence_get(f->sync_fence);
sync_fence_install(f->sync_fence, fd);
return fd;
#else
return -ENODEV;
#endif
}
static struct gk20a_fence *alloc_fence(const struct gk20a_fence_ops *ops,
struct sync_fence *sync_fence, bool wfi)
{
struct gk20a_fence *f = kzalloc(sizeof(*f), GFP_KERNEL);
if (!f)
return NULL;
kref_init(&f->ref);
f->ops = ops;
f->sync_fence = sync_fence;
f->wfi = wfi;
f->syncpt_id = -1;
return f;
}
/* Fences that are backed by GPU semaphores: */
static int gk20a_semaphore_fence_wait(struct gk20a_fence *f, long timeout)
{
long remain;
if (!gk20a_semaphore_is_acquired(f->semaphore))
return 0;
remain = wait_event_interruptible_timeout(
*f->semaphore_wq,
!gk20a_semaphore_is_acquired(f->semaphore),
timeout);
if (remain == 0 && gk20a_semaphore_is_acquired(f->semaphore))
return -ETIMEDOUT;
else if (remain < 0)
return remain;
return 0;
}
static bool gk20a_semaphore_fence_is_expired(struct gk20a_fence *f)
{
return !gk20a_semaphore_is_acquired(f->semaphore);
}
static const struct gk20a_fence_ops gk20a_semaphore_fence_ops = {
.wait = &gk20a_semaphore_fence_wait,
.is_expired = &gk20a_semaphore_fence_is_expired,
};
/* This function takes ownership of the semaphore */
struct gk20a_fence *gk20a_fence_from_semaphore(
struct sync_timeline *timeline,
struct gk20a_semaphore *semaphore,
wait_queue_head_t *semaphore_wq,
struct sync_fence *dependency,
bool wfi)
{
struct gk20a_fence *f;
struct sync_fence *sync_fence = NULL;
#ifdef CONFIG_SYNC
sync_fence = gk20a_sync_fence_create(timeline, semaphore,
dependency, "f-gk20a-0x%04x",
semaphore->offset & 0xffff);
if (!sync_fence)
return NULL;
#endif
f = alloc_fence(&gk20a_semaphore_fence_ops, sync_fence, wfi);
if (!f) {
#ifdef CONFIG_SYNC
sync_fence_put(sync_fence);
#endif
return NULL;
}
f->semaphore = semaphore;
f->semaphore_wq = semaphore_wq;
return f;
}
#ifdef CONFIG_TEGRA_GK20A
/* Fences that are backed by host1x syncpoints: */
static int gk20a_syncpt_fence_wait(struct gk20a_fence *f, long timeout)
{
return nvhost_syncpt_wait_timeout_ext(
f->host1x_pdev, f->syncpt_id, f->syncpt_value,
(u32)timeout, NULL, NULL);
}
static bool gk20a_syncpt_fence_is_expired(struct gk20a_fence *f)
{
return nvhost_syncpt_is_expired_ext(f->host1x_pdev, f->syncpt_id,
f->syncpt_value);
}
static const struct gk20a_fence_ops gk20a_syncpt_fence_ops = {
.wait = &gk20a_syncpt_fence_wait,
.is_expired = &gk20a_syncpt_fence_is_expired,
};
struct gk20a_fence *gk20a_fence_from_syncpt(struct platform_device *host1x_pdev,
u32 id, u32 value, bool wfi,
bool need_sync_fence)
{
struct gk20a_fence *f;
struct sync_fence *sync_fence = NULL;
#ifdef CONFIG_SYNC
struct nvhost_ctrl_sync_fence_info pt = {
.id = id,
.thresh = value
};
if (need_sync_fence) {
sync_fence = nvhost_sync_create_fence(host1x_pdev, &pt, 1,
"fence");
if (IS_ERR(sync_fence))
return NULL;
}
#endif
f = alloc_fence(&gk20a_syncpt_fence_ops, sync_fence, wfi);
if (!f) {
#ifdef CONFIG_SYNC
if (sync_fence)
sync_fence_put(sync_fence);
#endif
return NULL;
}
f->host1x_pdev = host1x_pdev;
f->syncpt_id = id;
f->syncpt_value = value;
return f;
}
#else
struct gk20a_fence *gk20a_fence_from_syncpt(struct platform_device *host1x_pdev,
u32 id, u32 value, bool wfi)
{
return NULL;
}
#endif
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