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/*
* drivers/video/tegra/host/nvhost_hwctx.h
*
* Tegra Graphics Host Hardware Context Interface
*
* Copyright (c) 2010-2011, NVIDIA Corporation.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that 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, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#ifndef __NVHOST_HWCTX_H
#define __NVHOST_HWCTX_H
#include <linux/string.h>
#include <linux/kref.h>
#include <mach/nvhost.h>
#include <mach/nvmap.h>
struct nvhost_channel;
struct nvhost_cdma;
struct nvhost_hwctx {
struct kref ref;
struct nvhost_channel *channel;
bool valid;
struct nvmap_handle_ref *save;
u32 save_incrs;
u32 save_thresh;
struct nvmap_handle_ref *restore;
u32 *restore_virt;
phys_addr_t restore_phys;
u32 restore_size;
u32 restore_incrs;
};
struct nvhost_hwctx_handler {
struct nvhost_hwctx * (*alloc) (struct nvhost_channel *ch);
void (*get) (struct nvhost_hwctx *ctx);
void (*put) (struct nvhost_hwctx *ctx);
void (*save_push) (struct nvhost_cdma *cdma, struct nvhost_hwctx *ctx);
void (*save_service) (struct nvhost_hwctx *ctx);
};
struct hwctx_reginfo {
unsigned int offset:12;
unsigned int count:16;
unsigned int type:2;
unsigned int version:2;
};
enum {
HWCTX_REGINFO_DIRECT = 0,
HWCTX_REGINFO_INDIRECT,
HWCTX_REGINFO_INDIRECT_4X
};
#define HWCTX_REGINFO(version, offset, count, type) {offset, count, HWCTX_REGINFO_##type, version}
#endif
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