mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-23 06:05:15 +07:00
8474b02531
This is largely a rewrite of the Host1x channel allocation code, bringing several changes: - The previous code could deadlock due to an interaction between the 'reflock' mutex and CDMA timeout handling. This gets rid of the mutex. - Support for more than 32 channels, required for Tegra186 - General refactoring, including better encapsulation of channel ownership handling into channel.c Signed-off-by: Mikko Perttunen <mperttunen@nvidia.com> Reviewed-by: Dmitry Osipenko <digetx@gmail.com> Tested-by: Dmitry Osipenko <digetx@gmail.com> Signed-off-by: Thierry Reding <treding@nvidia.com>
52 lines
1.4 KiB
C
52 lines
1.4 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/>.
|
|
*/
|
|
|
|
#ifndef __HOST1X_CHANNEL_H
|
|
#define __HOST1X_CHANNEL_H
|
|
|
|
#include <linux/io.h>
|
|
#include <linux/kref.h>
|
|
|
|
#include "cdma.h"
|
|
|
|
struct host1x;
|
|
struct host1x_channel;
|
|
|
|
struct host1x_channel_list {
|
|
struct host1x_channel *channels;
|
|
unsigned long *allocated_channels;
|
|
};
|
|
|
|
struct host1x_channel {
|
|
struct kref refcount;
|
|
unsigned int id;
|
|
struct mutex submitlock;
|
|
void __iomem *regs;
|
|
struct device *dev;
|
|
struct host1x_cdma cdma;
|
|
};
|
|
|
|
/* channel list operations */
|
|
int host1x_channel_list_init(struct host1x_channel_list *chlist,
|
|
unsigned int num_channels);
|
|
void host1x_channel_list_free(struct host1x_channel_list *chlist);
|
|
struct host1x_channel *host1x_channel_get_index(struct host1x *host,
|
|
unsigned int index);
|
|
|
|
#endif
|