1 /* 2 * Copyright (C) 2016 Google, Inc. 3 * 4 * This software is licensed under the terms of the GNU General Public 5 * License version 2, as published by the Free Software Foundation, and 6 * may be copied, distributed, and modified under those terms. 7 * 8 * This program is distributed in the hope that it will be useful, 9 * but WITHOUT ANY WARRANTY; without even the implied warranty of 10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 11 * GNU General Public License for more details. 12 * 13 */ 14 15 #ifndef ANDROID_INCLUDE_HARDWARE_GOLDFISH_DMA_H 16 #define ANDROID_INCLUDE_HARDWARE_GOLDFISH_DMA_H 17 18 #include <errno.h> 19 #include <linux/ioctl.h> 20 #include <linux/types.h> 21 #include <sys/cdefs.h> 22 #include <fcntl.h> 23 #include <stdlib.h> 24 25 /* There is an ioctl associated with goldfish dma driver. 26 * Make it conflict with ioctls that are not likely to be used 27 * in the emulator. 28 * 'G' 00-3F drivers/misc/sgi-gru/grulib.h conflict! 29 * 'G' 00-0F linux/gigaset_dev.h conflict! 30 */ 31 #define GOLDFISH_DMA_IOC_MAGIC 'G' 32 33 #define GOLDFISH_DMA_IOC_LOCK _IOWR(GOLDFISH_DMA_IOC_MAGIC, 0, struct goldfish_dma_ioctl_info) 34 #define GOLDFISH_DMA_IOC_UNLOCK _IOWR(GOLDFISH_DMA_IOC_MAGIC, 1, struct goldfish_dma_ioctl_info) 35 #define GOLDFISH_DMA_IOC_GETOFF _IOWR(GOLDFISH_DMA_IOC_MAGIC, 2, struct goldfish_dma_ioctl_info) 36 #define GOLDFISH_DMA_IOC_CREATE_REGION _IOWR(GOLDFISH_DMA_IOC_MAGIC, 3, struct goldfish_dma_ioctl_info) 37 38 struct goldfish_dma_ioctl_info { 39 uint64_t phys_begin; 40 uint64_t size; 41 }; 42 43 // userspace interface 44 struct goldfish_dma_context { 45 void* mapped; 46 #if !defined(__LP64__) 47 int mapped_padding; 48 #endif 49 uint64_t sz; // size of reservation 50 int fd; 51 int fd_padding; 52 }; 53 54 int goldfish_dma_lock(struct goldfish_dma_context* cxt); 55 int goldfish_dma_unlock(struct goldfish_dma_context* cxt); 56 int goldfish_dma_create_region(uint32_t sz, struct goldfish_dma_context* res); 57 58 void* goldfish_dma_map(struct goldfish_dma_context* cxt); 59 int goldfish_dma_unmap(struct goldfish_dma_context* cxt); 60 61 void goldfish_dma_write(struct goldfish_dma_context* cxt, 62 void* to_write, 63 uint32_t sz); 64 65 void goldfish_dma_free(goldfish_dma_context* cxt); 66 uint64_t goldfish_dma_guest_paddr(struct goldfish_dma_context* cxt); 67 68 #endif 69
