| /* |
| * Copyright (C) 2016 Google, Inc. |
| * |
| * This software is licensed under the terms of the GNU General Public |
| * License version 2, as published by the Free Software Foundation, and |
| * may be copied, distributed, and modified under those terms. |
| * |
| * 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. |
| * |
| */ |
| |
| #ifndef ANDROID_INCLUDE_HARDWARE_GOLDFISH_DMA_H |
| #define ANDROID_INCLUDE_HARDWARE_GOLDFISH_DMA_H |
| |
| #include <errno.h> |
| #include <linux/ioctl.h> |
| #include <linux/types.h> |
| #include <sys/cdefs.h> |
| #include <fcntl.h> |
| #include <stdlib.h> |
| |
| /* There is an ioctl associated with goldfish dma driver. |
| * Make it conflict with ioctls that are not likely to be used |
| * in the emulator. |
| * 'G' 00-3F drivers/misc/sgi-gru/grulib.h conflict! |
| * 'G' 00-0F linux/gigaset_dev.h conflict! |
| */ |
| #define GOLDFISH_DMA_IOC_MAGIC 'G' |
| |
| #define GOLDFISH_DMA_IOC_LOCK _IOWR(GOLDFISH_DMA_IOC_MAGIC, 0, struct goldfish_dma_ioctl_info) |
| #define GOLDFISH_DMA_IOC_UNLOCK _IOWR(GOLDFISH_DMA_IOC_MAGIC, 1, struct goldfish_dma_ioctl_info) |
| #define GOLDFISH_DMA_IOC_GETOFF _IOWR(GOLDFISH_DMA_IOC_MAGIC, 2, struct goldfish_dma_ioctl_info) |
| #define GOLDFISH_DMA_IOC_CREATE_REGION _IOWR(GOLDFISH_DMA_IOC_MAGIC, 3, struct goldfish_dma_ioctl_info) |
| |
| struct goldfish_dma_ioctl_info { |
| uint64_t phys_begin; |
| uint64_t size; |
| }; |
| |
| // userspace interface |
| struct goldfish_dma_context { |
| void* mapped; |
| #if !defined(__LP64__) |
| int mapped_padding; |
| #endif |
| uint64_t sz; // size of reservation |
| int fd; |
| int fd_padding; |
| }; |
| |
| int goldfish_dma_lock(struct goldfish_dma_context* cxt); |
| int goldfish_dma_unlock(struct goldfish_dma_context* cxt); |
| int goldfish_dma_create_region(uint32_t sz, struct goldfish_dma_context* res); |
| |
| void* goldfish_dma_map(struct goldfish_dma_context* cxt); |
| int goldfish_dma_unmap(struct goldfish_dma_context* cxt); |
| |
| void goldfish_dma_write(struct goldfish_dma_context* cxt, |
| void* to_write, |
| uint32_t sz); |
| |
| void goldfish_dma_free(goldfish_dma_context* cxt); |
| uint64_t goldfish_dma_guest_paddr(struct goldfish_dma_context* cxt); |
| |
| #endif |