| /* |
| * cma_driver.h - Broadcom STB platform CMA driver |
| * |
| * Copyright (C) 2009 - 2013 Broadcom 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, 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; see the file COPYING. If not, write to |
| * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. |
| */ |
| #ifndef __CMA_DRIVER_H__ |
| #define __CMA_DRIVER_H__ |
| |
| #include <linux/device.h> |
| #include <linux/platform_device.h> |
| #include <linux/ioctl.h> |
| #include <linux/uaccess.h> |
| #include <linux/list.h> |
| #include <linux/dma-contiguous.h> |
| #include <linux/brcmstb/memory_api.h> |
| #include <uapi/linux/brcmstb/cma_driver.h> |
| |
| /* Incremented when public API changes */ |
| #define CMA_DRIVER_VERSION 0 |
| |
| struct mem_range { |
| u64 base; |
| u32 size; |
| }; |
| |
| struct region_list { |
| struct list_head list; |
| struct mem_range region; |
| }; |
| |
| struct cma_dev { |
| struct device *dev; |
| u32 cma_dev_index; |
| struct mem_range range; /* addresses that this cma_dev controls */ |
| struct list_head list; |
| int memc; |
| }; |
| |
| /* |
| * Note to kernel module / driver developers: |
| * This interface is subject to change! |
| * |
| * For more information, please refer to: |
| * http://jira.broadcom.com/browse/SWLINUX-2473 |
| */ |
| struct cma_dev *cma_dev_get_cma_dev(int memc); |
| int cma_dev_get_mem(struct cma_dev *cma_dev, u64 *addr, u32 len, |
| u32 align); |
| int cma_dev_put_mem(struct cma_dev *cma_dev, u64 addr, u32 len); |
| int cma_dev_get_num_regions(struct cma_dev *cma_dev); |
| int cma_dev_get_region_info(struct cma_dev *cma_dev, int region_num, |
| s32 *memc, u64 *addr, u32 *num_bytes); |
| int cma_drvr_is_ready(void); |
| |
| static inline void *cma_dev_kva_map(struct page *page, int num_pages, |
| pgprot_t pgprot) |
| { |
| return brcmstb_memory_kva_map(page, num_pages, pgprot); |
| } |
| |
| static inline int cma_dev_kva_unmap(const void *kva) |
| { |
| return brcmstb_memory_kva_unmap(kva); |
| } |
| |
| /* Below functions are for calling during initialization and may need stubs */ |
| |
| #ifdef CONFIG_BRCMSTB_CMA |
| void __init cma_reserve(void); |
| void __init cma_register(void); |
| #else |
| static inline void cma_reserve(void) {} |
| static inline void cma_register(void) {} |
| #endif |
| |
| #endif /* __CMA_DRIVER_H__ */ |