107 lines
2.3 KiB
C
107 lines
2.3 KiB
C
/*
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* drivers/video/tegra/host/gk20a/cdma_gk20a.c
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*
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* Tegra Graphics Host Command DMA
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*
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* Copyright (c) 2011, NVIDIA CORPORATION. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "../nvhost_cdma.h"
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#include "../dev.h"
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#include "cdma_gk20a.h"
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/*
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* push_buffer
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*
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* The push buffer is a circular array of words to be fetched by command DMA.
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* Note that it works slightly differently to the sync queue; fence == cur
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* means that the push buffer is full, not empty.
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*/
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/**
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* Reset to empty push buffer
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*/
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void gk20a_push_buffer_reset(struct push_buffer *pb)
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{
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}
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/**
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* Init push buffer resources
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*/
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int gk20a_push_buffer_init(struct push_buffer *pb)
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{
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return 0;
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}
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/**
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* Clean up push buffer resources
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*/
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void gk20a_push_buffer_destroy(struct push_buffer *pb)
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{
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}
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/**
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* Push two words to the push buffer
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* Caller must ensure push buffer is not full
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*/
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void gk20a_push_buffer_push_to(struct push_buffer *pb,
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struct mem_mgr *client,
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struct mem_handle *handle, u32 op1, u32 op2)
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{
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}
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/**
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* Pop a number of two word slots from the push buffer
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* Caller must ensure push buffer is not empty
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*/
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void gk20a_push_buffer_pop_from(struct push_buffer *pb, unsigned int slots)
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{
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}
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/**
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* Return the number of two word slots free in the push buffer
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*/
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u32 gk20a_push_buffer_space(struct push_buffer *pb)
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{
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return 0;
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}
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u32 gk20a_push_buffer_putptr(struct push_buffer *pb)
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{
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return 0;
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}
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/**
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* Start channel DMA
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*/
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void gk20a_cdma_start(struct nvhost_cdma *cdma)
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{
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}
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/**
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* Kick channel DMA into action by writing its PUT offset (if it has changed)
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*/
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void gk20a_cdma_kick(struct nvhost_cdma *cdma)
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{
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}
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void gk20a_cdma_stop(struct nvhost_cdma *cdma)
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{
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}
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