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Diffstat (limited to 'drivers/media/video/tiler/tmm.h')
| -rw-r--r-- | drivers/media/video/tiler/tmm.h | 130 |
1 files changed, 130 insertions, 0 deletions
diff --git a/drivers/media/video/tiler/tmm.h b/drivers/media/video/tiler/tmm.h new file mode 100644 index 0000000..dc1b5b3 --- /dev/null +++ b/drivers/media/video/tiler/tmm.h @@ -0,0 +1,130 @@ +/* + * 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 |