mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-25 23:25:37 +07:00
e18e33afa4
find_first_zero_bit() returns an unsigned long, so make the local variable that stores the result the same type for consistency. Signed-off-by: Thierry Reding <treding@nvidia.com>
133 lines
3.1 KiB
C
133 lines
3.1 KiB
C
/*
|
|
* Tegra host1x Channel
|
|
*
|
|
* Copyright (c) 2010-2013, NVIDIA Corporation.
|
|
*
|
|
* 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.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include <linux/slab.h>
|
|
#include <linux/module.h>
|
|
|
|
#include "channel.h"
|
|
#include "dev.h"
|
|
#include "job.h"
|
|
|
|
/* Constructor for the host1x device list */
|
|
int host1x_channel_list_init(struct host1x *host)
|
|
{
|
|
INIT_LIST_HEAD(&host->chlist.list);
|
|
mutex_init(&host->chlist_mutex);
|
|
|
|
if (host->info->nb_channels > BITS_PER_LONG) {
|
|
WARN(1, "host1x hardware has more channels than supported by the driver\n");
|
|
return -ENOSYS;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int host1x_job_submit(struct host1x_job *job)
|
|
{
|
|
struct host1x *host = dev_get_drvdata(job->channel->dev->parent);
|
|
|
|
return host1x_hw_channel_submit(host, job);
|
|
}
|
|
EXPORT_SYMBOL(host1x_job_submit);
|
|
|
|
struct host1x_channel *host1x_channel_get(struct host1x_channel *channel)
|
|
{
|
|
int err = 0;
|
|
|
|
mutex_lock(&channel->reflock);
|
|
|
|
if (channel->refcount == 0)
|
|
err = host1x_cdma_init(&channel->cdma);
|
|
|
|
if (!err)
|
|
channel->refcount++;
|
|
|
|
mutex_unlock(&channel->reflock);
|
|
|
|
return err ? NULL : channel;
|
|
}
|
|
EXPORT_SYMBOL(host1x_channel_get);
|
|
|
|
void host1x_channel_put(struct host1x_channel *channel)
|
|
{
|
|
mutex_lock(&channel->reflock);
|
|
|
|
if (channel->refcount == 1) {
|
|
struct host1x *host = dev_get_drvdata(channel->dev->parent);
|
|
|
|
host1x_hw_cdma_stop(host, &channel->cdma);
|
|
host1x_cdma_deinit(&channel->cdma);
|
|
}
|
|
|
|
channel->refcount--;
|
|
|
|
mutex_unlock(&channel->reflock);
|
|
}
|
|
EXPORT_SYMBOL(host1x_channel_put);
|
|
|
|
struct host1x_channel *host1x_channel_request(struct device *dev)
|
|
{
|
|
struct host1x *host = dev_get_drvdata(dev->parent);
|
|
unsigned int max_channels = host->info->nb_channels;
|
|
struct host1x_channel *channel = NULL;
|
|
unsigned long index;
|
|
int err;
|
|
|
|
mutex_lock(&host->chlist_mutex);
|
|
|
|
index = find_first_zero_bit(&host->allocated_channels, max_channels);
|
|
if (index >= max_channels)
|
|
goto fail;
|
|
|
|
channel = kzalloc(sizeof(*channel), GFP_KERNEL);
|
|
if (!channel)
|
|
goto fail;
|
|
|
|
err = host1x_hw_channel_init(host, channel, index);
|
|
if (err < 0)
|
|
goto fail;
|
|
|
|
/* Link device to host1x_channel */
|
|
channel->dev = dev;
|
|
|
|
/* Add to channel list */
|
|
list_add_tail(&channel->list, &host->chlist.list);
|
|
|
|
host->allocated_channels |= BIT(index);
|
|
|
|
mutex_unlock(&host->chlist_mutex);
|
|
return channel;
|
|
|
|
fail:
|
|
dev_err(dev, "failed to init channel\n");
|
|
kfree(channel);
|
|
mutex_unlock(&host->chlist_mutex);
|
|
return NULL;
|
|
}
|
|
EXPORT_SYMBOL(host1x_channel_request);
|
|
|
|
void host1x_channel_free(struct host1x_channel *channel)
|
|
{
|
|
struct host1x *host = dev_get_drvdata(channel->dev->parent);
|
|
|
|
host->allocated_channels &= ~BIT(channel->id);
|
|
list_del(&channel->list);
|
|
kfree(channel);
|
|
}
|
|
EXPORT_SYMBOL(host1x_channel_free);
|