Rom Lemarchand | 827c849 | 2013-12-13 14:24:55 -0800 | [diff] [blame] | 1 | /* |
| 2 | * drivers/staging/android/ion/compat_ion.c |
| 3 | * |
| 4 | * Copyright (C) 2013 Google, Inc. |
| 5 | * |
| 6 | * This software is licensed under the terms of the GNU General Public |
| 7 | * License version 2, as published by the Free Software Foundation, and |
| 8 | * may be copied, distributed, and modified under those terms. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | * GNU General Public License for more details. |
| 14 | * |
| 15 | */ |
| 16 | |
| 17 | #include <linux/compat.h> |
| 18 | #include <linux/fs.h> |
| 19 | #include <linux/uaccess.h> |
| 20 | |
| 21 | #include "ion.h" |
| 22 | #include "compat_ion.h" |
| 23 | |
Colin Cross | c3a2fe0 | 2013-12-13 14:24:57 -0800 | [diff] [blame] | 24 | /* See drivers/staging/android/uapi/ion.h for the definition of these structs */ |
Rom Lemarchand | 827c849 | 2013-12-13 14:24:55 -0800 | [diff] [blame] | 25 | struct compat_ion_allocation_data { |
| 26 | compat_size_t len; |
| 27 | compat_size_t align; |
| 28 | compat_uint_t heap_id_mask; |
| 29 | compat_uint_t flags; |
| 30 | compat_int_t handle; |
| 31 | }; |
| 32 | |
| 33 | struct compat_ion_custom_data { |
| 34 | compat_uint_t cmd; |
| 35 | compat_ulong_t arg; |
| 36 | }; |
| 37 | |
John Stultz | 687258f | 2013-12-13 14:24:58 -0800 | [diff] [blame] | 38 | #define COMPAT_ION_IOC_ALLOC _IOWR(ION_IOC_MAGIC, 0, \ |
| 39 | struct compat_ion_allocation_data) |
| 40 | #define COMPAT_ION_IOC_FREE _IOWR(ION_IOC_MAGIC, 1, struct ion_handle_data) |
| 41 | #define COMPAT_ION_IOC_CUSTOM _IOWR(ION_IOC_MAGIC, 6, \ |
| 42 | struct compat_ion_custom_data) |
| 43 | |
Rom Lemarchand | 827c849 | 2013-12-13 14:24:55 -0800 | [diff] [blame] | 44 | static int compat_get_ion_allocation_data( |
| 45 | struct compat_ion_allocation_data __user *data32, |
| 46 | struct ion_allocation_data __user *data) |
| 47 | { |
| 48 | compat_size_t s; |
| 49 | compat_uint_t u; |
| 50 | compat_int_t i; |
| 51 | int err; |
| 52 | |
| 53 | err = get_user(s, &data32->len); |
| 54 | err |= put_user(s, &data->len); |
| 55 | err |= get_user(s, &data32->align); |
| 56 | err |= put_user(s, &data->align); |
| 57 | err |= get_user(u, &data32->heap_id_mask); |
| 58 | err |= put_user(u, &data->heap_id_mask); |
| 59 | err |= get_user(u, &data32->flags); |
| 60 | err |= put_user(u, &data->flags); |
| 61 | err |= get_user(i, &data32->handle); |
| 62 | err |= put_user(i, &data->handle); |
| 63 | |
| 64 | return err; |
| 65 | } |
| 66 | |
| 67 | static int compat_put_ion_allocation_data( |
| 68 | struct compat_ion_allocation_data __user *data32, |
| 69 | struct ion_allocation_data __user *data) |
| 70 | { |
| 71 | compat_size_t s; |
| 72 | compat_uint_t u; |
| 73 | compat_int_t i; |
| 74 | int err; |
| 75 | |
| 76 | err = get_user(s, &data->len); |
| 77 | err |= put_user(s, &data32->len); |
| 78 | err |= get_user(s, &data->align); |
| 79 | err |= put_user(s, &data32->align); |
| 80 | err |= get_user(u, &data->heap_id_mask); |
| 81 | err |= put_user(u, &data32->heap_id_mask); |
| 82 | err |= get_user(u, &data->flags); |
| 83 | err |= put_user(u, &data32->flags); |
| 84 | err |= get_user(i, &data->handle); |
| 85 | err |= put_user(i, &data32->handle); |
| 86 | |
| 87 | return err; |
| 88 | } |
| 89 | |
| 90 | static int compat_get_ion_custom_data( |
| 91 | struct compat_ion_custom_data __user *data32, |
| 92 | struct ion_custom_data __user *data) |
| 93 | { |
| 94 | compat_uint_t cmd; |
| 95 | compat_ulong_t arg; |
| 96 | int err; |
| 97 | |
| 98 | err = get_user(cmd, &data32->cmd); |
| 99 | err |= put_user(cmd, &data->cmd); |
| 100 | err |= get_user(arg, &data32->arg); |
| 101 | err |= put_user(arg, &data->arg); |
| 102 | |
| 103 | return err; |
| 104 | }; |
| 105 | |
| 106 | long compat_ion_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) |
| 107 | { |
| 108 | long ret; |
| 109 | |
| 110 | if (!filp->f_op || !filp->f_op->unlocked_ioctl) |
| 111 | return -ENOTTY; |
| 112 | |
| 113 | switch (cmd) { |
John Stultz | 687258f | 2013-12-13 14:24:58 -0800 | [diff] [blame] | 114 | case COMPAT_ION_IOC_ALLOC: |
Rom Lemarchand | 827c849 | 2013-12-13 14:24:55 -0800 | [diff] [blame] | 115 | { |
| 116 | struct compat_ion_allocation_data __user *data32; |
| 117 | struct ion_allocation_data __user *data; |
| 118 | int err; |
| 119 | |
| 120 | data32 = compat_ptr(arg); |
| 121 | data = compat_alloc_user_space(sizeof(*data)); |
| 122 | if (data == NULL) |
| 123 | return -EFAULT; |
| 124 | |
| 125 | err = compat_get_ion_allocation_data(data32, data); |
| 126 | if (err) |
| 127 | return err; |
John Stultz | 687258f | 2013-12-13 14:24:58 -0800 | [diff] [blame] | 128 | ret = filp->f_op->unlocked_ioctl(filp, ION_IOC_ALLOC, |
Rom Lemarchand | 827c849 | 2013-12-13 14:24:55 -0800 | [diff] [blame] | 129 | (unsigned long)data); |
| 130 | err = compat_put_ion_allocation_data(data32, data); |
| 131 | return ret ? ret : err; |
| 132 | } |
John Stultz | 687258f | 2013-12-13 14:24:58 -0800 | [diff] [blame] | 133 | case COMPAT_ION_IOC_FREE: |
Rom Lemarchand | 827c849 | 2013-12-13 14:24:55 -0800 | [diff] [blame] | 134 | { |
| 135 | struct compat_ion_allocation_data __user *data32; |
| 136 | struct ion_allocation_data __user *data; |
| 137 | int err; |
| 138 | |
| 139 | data32 = compat_ptr(arg); |
| 140 | data = compat_alloc_user_space(sizeof(*data)); |
| 141 | if (data == NULL) |
| 142 | return -EFAULT; |
| 143 | |
| 144 | err = compat_get_ion_allocation_data(data32, data); |
| 145 | if (err) |
| 146 | return err; |
| 147 | |
John Stultz | 687258f | 2013-12-13 14:24:58 -0800 | [diff] [blame] | 148 | return filp->f_op->unlocked_ioctl(filp, ION_IOC_FREE, |
Rom Lemarchand | 827c849 | 2013-12-13 14:24:55 -0800 | [diff] [blame] | 149 | (unsigned long)data); |
| 150 | } |
John Stultz | 687258f | 2013-12-13 14:24:58 -0800 | [diff] [blame] | 151 | case COMPAT_ION_IOC_CUSTOM: { |
Rom Lemarchand | 827c849 | 2013-12-13 14:24:55 -0800 | [diff] [blame] | 152 | struct compat_ion_custom_data __user *data32; |
| 153 | struct ion_custom_data __user *data; |
| 154 | int err; |
| 155 | |
| 156 | data32 = compat_ptr(arg); |
| 157 | data = compat_alloc_user_space(sizeof(*data)); |
| 158 | if (data == NULL) |
| 159 | return -EFAULT; |
| 160 | |
| 161 | err = compat_get_ion_custom_data(data32, data); |
| 162 | if (err) |
| 163 | return err; |
| 164 | |
John Stultz | 687258f | 2013-12-13 14:24:58 -0800 | [diff] [blame] | 165 | return filp->f_op->unlocked_ioctl(filp, ION_IOC_CUSTOM, |
Rom Lemarchand | 827c849 | 2013-12-13 14:24:55 -0800 | [diff] [blame] | 166 | (unsigned long)data); |
| 167 | } |
| 168 | case ION_IOC_SHARE: |
| 169 | case ION_IOC_MAP: |
| 170 | case ION_IOC_IMPORT: |
| 171 | case ION_IOC_SYNC: |
| 172 | return filp->f_op->unlocked_ioctl(filp, cmd, |
| 173 | (unsigned long)compat_ptr(arg)); |
| 174 | default: |
| 175 | return -ENOIOCTLCMD; |
| 176 | } |
| 177 | } |