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/*
* drivers/video/tegra/host/3dctx_common.c
*
* Tegra Graphics Host 3d hardware context
*
* Copyright (c) 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.
*/
/*** restore ***/
#include <mach/nvmap.h>
#include <linux/slab.h>
#include "3dctx_common.h"
#include "t20/t20.h"
#include "t20/hardware_t20.h"
#include "t20/syncpt_t20.h"
#include "nvhost_hwctx.h"
#include "dev.h"
#include "3d_common.h"
unsigned int nvhost_3dctx_restore_size;
unsigned int nvhost_3dctx_restore_incrs;
struct nvmap_handle_ref *nvhost_3dctx_save_buf;
unsigned int nvhost_3dctx_save_incrs;
unsigned int nvhost_3dctx_save_thresh;
unsigned int nvhost_3dctx_save_slots;
void nvhost_3dctx_restore_begin(u32 *ptr)
{
/* set class to host */
ptr[0] = nvhost_opcode_setclass(NV_HOST1X_CLASS_ID,
NV_CLASS_HOST_INCR_SYNCPT_BASE, 1);
/* increment sync point base */
ptr[1] = nvhost_class_host_incr_syncpt_base(NVWAITBASE_3D,
nvhost_3dctx_restore_incrs);
/* set class to 3D */
ptr[2] = nvhost_opcode_setclass(NV_GRAPHICS_3D_CLASS_ID, 0, 0);
/* program PSEQ_QUAD_ID */
ptr[3] = nvhost_opcode_imm(AR3D_PSEQ_QUAD_ID, 0);
}
void nvhost_3dctx_restore_direct(u32 *ptr, u32 start_reg, u32 count)
{
ptr[0] = nvhost_opcode_incr(start_reg, count);
}
void nvhost_3dctx_restore_indirect(u32 *ptr, u32 offset_reg, u32 offset,
u32 data_reg, u32 count)
{
ptr[0] = nvhost_opcode_imm(offset_reg, offset);
ptr[1] = nvhost_opcode_nonincr(data_reg, count);
}
void nvhost_3dctx_restore_end(u32 *ptr)
{
/* syncpt increment to track restore gather. */
ptr[0] = nvhost_opcode_imm_incr_syncpt(
NV_SYNCPT_OP_DONE, NVSYNCPT_3D);
}
/*** ctx3d ***/
struct nvhost_hwctx *nvhost_3dctx_alloc_common(struct nvhost_channel *ch,
bool map_restore)
{
struct nvmap_client *nvmap = ch->dev->nvmap;
struct nvhost_hwctx *ctx;
ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
if (!ctx)
return NULL;
ctx->restore = nvmap_alloc(nvmap, nvhost_3dctx_restore_size * 4, 32,
map_restore ? NVMAP_HANDLE_WRITE_COMBINE
: NVMAP_HANDLE_UNCACHEABLE);
if (IS_ERR_OR_NULL(ctx->restore))
goto fail;
if (map_restore) {
ctx->restore_virt = nvmap_mmap(ctx->restore);
if (!ctx->restore_virt)
goto fail;
} else
ctx->restore_virt = NULL;
kref_init(&ctx->ref);
ctx->channel = ch;
ctx->valid = false;
ctx->save = nvhost_3dctx_save_buf;
ctx->save_incrs = nvhost_3dctx_save_incrs;
ctx->save_thresh = nvhost_3dctx_save_thresh;
ctx->save_slots = nvhost_3dctx_save_slots;
ctx->restore_phys = nvmap_pin(nvmap, ctx->restore);
if (IS_ERR_VALUE(ctx->restore_phys))
goto fail;
ctx->restore_size = nvhost_3dctx_restore_size;
ctx->restore_incrs = nvhost_3dctx_restore_incrs;
return ctx;
fail:
if (map_restore && ctx->restore_virt) {
nvmap_munmap(ctx->restore, ctx->restore_virt);
ctx->restore_virt = NULL;
}
nvmap_free(nvmap, ctx->restore);
ctx->restore = NULL;
kfree(ctx);
return NULL;
}
void nvhost_3dctx_get(struct nvhost_hwctx *ctx)
{
kref_get(&ctx->ref);
}
void nvhost_3dctx_free(struct kref *ref)
{
struct nvhost_hwctx *ctx = container_of(ref, struct nvhost_hwctx, ref);
struct nvmap_client *nvmap = ctx->channel->dev->nvmap;
if (ctx->restore_virt) {
nvmap_munmap(ctx->restore, ctx->restore_virt);
ctx->restore_virt = NULL;
}
nvmap_unpin(nvmap, ctx->restore);
ctx->restore_phys = 0;
nvmap_free(nvmap, ctx->restore);
ctx->restore = NULL;
kfree(ctx);
}
void nvhost_3dctx_put(struct nvhost_hwctx *ctx)
{
kref_put(&ctx->ref, nvhost_3dctx_free);
}
int nvhost_3dctx_prepare_power_off(struct nvhost_module *mod)
{
return nvhost_t20_save_context(mod, NVSYNCPT_3D);
}
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