1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ 2 /* 3 * 4 * (C) COPYRIGHT 2012-2013, 2017, 2020-2021 ARM Limited. All rights reserved. 5 * 6 * This program is free software and is provided to you under the terms of the 7 * GNU General Public License version 2 as published by the Free Software 8 * Foundation, and any use by you of this program is subject to the terms 9 * of such GNU license. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, you can access it online at 18 * http://www.gnu.org/licenses/gpl-2.0.html. 19 * 20 */ 21 22 #ifndef _LINUX_DMA_BUF_TEST_EXPORTER_H_ 23 #define _LINUX_DMA_BUF_TEST_EXPORTER_H_ 24 25 #include <linux/types.h> 26 #include <linux/ioctl.h> 27 28 #define DMA_BUF_TE_VER_MAJOR 1 29 #define DMA_BUF_TE_VER_MINOR 0 30 #define DMA_BUF_TE_ENQ 0x642d7465 31 #define DMA_BUF_TE_ACK 0x68692100 32 33 struct dma_buf_te_ioctl_version { 34 int op; /**< Must be set to DMA_BUF_TE_ENQ by client, driver will set it to DMA_BUF_TE_ACK */ 35 int major; /**< Major version */ 36 int minor; /**< Minor version */ 37 }; 38 39 struct dma_buf_te_ioctl_alloc { 40 __u64 size; /* size of buffer to allocate, in pages */ 41 }; 42 43 struct dma_buf_te_ioctl_status { 44 /* in */ 45 int fd; /* the dma_buf to query, only dma_buf objects exported by this driver is supported */ 46 /* out */ 47 int attached_devices; /* number of devices attached (active 'dma_buf_attach's) */ 48 int device_mappings; /* number of device mappings (active 'dma_buf_map_attachment's) */ 49 int cpu_mappings; /* number of cpu mappings (active 'mmap's) */ 50 }; 51 52 struct dma_buf_te_ioctl_set_failing { 53 /* in */ 54 int fd; /* the dma_buf to set failure mode for, only dma_buf objects exported by this driver is supported */ 55 56 /* zero = no fail injection, non-zero = inject failure */ 57 int fail_attach; 58 int fail_map; 59 int fail_mmap; 60 }; 61 62 struct dma_buf_te_ioctl_fill { 63 int fd; 64 unsigned int value; 65 }; 66 67 #define DMA_BUF_TE_IOCTL_BASE 'E' 68 /* Below all returning 0 if successful or -errcode except DMA_BUF_TE_ALLOC which will return fd or -errcode */ 69 #define DMA_BUF_TE_VERSION _IOR(DMA_BUF_TE_IOCTL_BASE, 0x00, struct dma_buf_te_ioctl_version) 70 #define DMA_BUF_TE_ALLOC _IOR(DMA_BUF_TE_IOCTL_BASE, 0x01, struct dma_buf_te_ioctl_alloc) 71 #define DMA_BUF_TE_QUERY _IOR(DMA_BUF_TE_IOCTL_BASE, 0x02, struct dma_buf_te_ioctl_status) 72 #define DMA_BUF_TE_SET_FAILING _IOW(DMA_BUF_TE_IOCTL_BASE, 0x03, struct dma_buf_te_ioctl_set_failing) 73 #define DMA_BUF_TE_ALLOC_CONT _IOR(DMA_BUF_TE_IOCTL_BASE, 0x04, struct dma_buf_te_ioctl_alloc) 74 #define DMA_BUF_TE_FILL _IOR(DMA_BUF_TE_IOCTL_BASE, 0x05, struct dma_buf_te_ioctl_fill) 75 76 #endif /* _LINUX_DMA_BUF_TEST_EXPORTER_H_ */ 77