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/*
* tmm.h
*
* TMM interface definition for TI TILER driver.
*
* Author: Lajos Molnar <molnar@ti.com>
*
* Copyright (C) 2009-2011 Texas Instruments, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* * Neither the name of Texas Instruments Incorporated nor the names of
* its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef TMM_H
#define TMM_H
#include <mach/dmm.h>
/**
* TMM interface
*/
struct tmm {
void *pvt;
/* function table */
u32 *(*get) (struct tmm *tmm, u32 num_pages);
void (*free) (struct tmm *tmm, u32 *pages);
s32 (*pin) (struct tmm *tmm, struct pat_area area, u32 page_pa);
void (*unpin) (struct tmm *tmm, struct pat_area area);
void (*deinit) (struct tmm *tmm);
};
/**
* Request a set of pages from the DMM free page stack.
* @return a pointer to a list of physical page addresses.
*/
static inline
u32 *tmm_get(struct tmm *tmm, u32 num_pages)
{
if (tmm && tmm->pvt)
return tmm->get(tmm, num_pages);
return NULL;
}
/**
* Return a set of used pages to the DMM free page stack.
* @param list a pointer to a list of physical page addresses.
*/
static inline
void tmm_free(struct tmm *tmm, u32 *pages)
{
if (tmm && tmm->pvt)
tmm->free(tmm, pages);
}
/**
* Program the physical address translator.
* @param area PAT area
* @param list of pages
*/
static inline
s32 tmm_pin(struct tmm *tmm, struct pat_area area, u32 page_pa)
{
if (tmm && tmm->pin && tmm->pvt)
return tmm->pin(tmm, area, page_pa);
return -ENODEV;
}
/**
* Clears the physical address translator.
* @param area PAT area
*/
static inline
void tmm_unpin(struct tmm *tmm, struct pat_area area)
{
if (tmm && tmm->unpin && tmm->pvt)
tmm->unpin(tmm, area);
}
/**
* Checks whether tiler memory manager supports mapping
*/
static inline
bool tmm_can_pin(struct tmm *tmm)
{
return tmm && tmm->pin;
}
/**
* Deinitialize tiler memory manager
*/
static inline
void tmm_deinit(struct tmm *tmm)
{
if (tmm && tmm->pvt)
tmm->deinit(tmm);
}
/**
* TMM implementation for PAT support.
*
* Initialize TMM for PAT with given id.
*/
struct tmm *tmm_pat_init(u32 pat_id, u32 *dmac_va, u32 dmac_pa);
#endif
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