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 | |
Laura Abbott | 8666a87 | 2014-02-04 16:08:39 -0800 | [diff] [blame] | 38 | struct compat_ion_handle_data { |
| 39 | compat_int_t handle; |
| 40 | }; |
| 41 | |
John Stultz | 687258f | 2013-12-13 14:24:58 -0800 | [diff] [blame] | 42 | #define COMPAT_ION_IOC_ALLOC _IOWR(ION_IOC_MAGIC, 0, \ |
| 43 | struct compat_ion_allocation_data) |
Laura Abbott | 8666a87 | 2014-02-04 16:08:39 -0800 | [diff] [blame] | 44 | #define COMPAT_ION_IOC_FREE _IOWR(ION_IOC_MAGIC, 1, \ |
| 45 | struct compat_ion_handle_data) |
John Stultz | 687258f | 2013-12-13 14:24:58 -0800 | [diff] [blame] | 46 | #define COMPAT_ION_IOC_CUSTOM _IOWR(ION_IOC_MAGIC, 6, \ |
| 47 | struct compat_ion_custom_data) |
| 48 | |
Rom Lemarchand | 827c849 | 2013-12-13 14:24:55 -0800 | [diff] [blame] | 49 | static int compat_get_ion_allocation_data( |
| 50 | struct compat_ion_allocation_data __user *data32, |
| 51 | struct ion_allocation_data __user *data) |
| 52 | { |
| 53 | compat_size_t s; |
| 54 | compat_uint_t u; |
| 55 | compat_int_t i; |
| 56 | int err; |
| 57 | |
| 58 | err = get_user(s, &data32->len); |
| 59 | err |= put_user(s, &data->len); |
| 60 | err |= get_user(s, &data32->align); |
| 61 | err |= put_user(s, &data->align); |
| 62 | err |= get_user(u, &data32->heap_id_mask); |
| 63 | err |= put_user(u, &data->heap_id_mask); |
| 64 | err |= get_user(u, &data32->flags); |
| 65 | err |= put_user(u, &data->flags); |
| 66 | err |= get_user(i, &data32->handle); |
| 67 | err |= put_user(i, &data->handle); |
| 68 | |
| 69 | return err; |
| 70 | } |
| 71 | |
Laura Abbott | 8666a87 | 2014-02-04 16:08:39 -0800 | [diff] [blame] | 72 | static int compat_get_ion_handle_data( |
| 73 | struct compat_ion_handle_data __user *data32, |
| 74 | struct ion_handle_data __user *data) |
| 75 | { |
| 76 | compat_int_t i; |
| 77 | int err; |
| 78 | |
| 79 | err = get_user(i, &data32->handle); |
| 80 | err |= put_user(i, &data->handle); |
| 81 | |
| 82 | return err; |
| 83 | } |
| 84 | |
Rom Lemarchand | 827c849 | 2013-12-13 14:24:55 -0800 | [diff] [blame] | 85 | static int compat_put_ion_allocation_data( |
| 86 | struct compat_ion_allocation_data __user *data32, |
| 87 | struct ion_allocation_data __user *data) |
| 88 | { |
| 89 | compat_size_t s; |
| 90 | compat_uint_t u; |
| 91 | compat_int_t i; |
| 92 | int err; |
| 93 | |
| 94 | err = get_user(s, &data->len); |
| 95 | err |= put_user(s, &data32->len); |
| 96 | err |= get_user(s, &data->align); |
| 97 | err |= put_user(s, &data32->align); |
| 98 | err |= get_user(u, &data->heap_id_mask); |
| 99 | err |= put_user(u, &data32->heap_id_mask); |
| 100 | err |= get_user(u, &data->flags); |
| 101 | err |= put_user(u, &data32->flags); |
| 102 | err |= get_user(i, &data->handle); |
| 103 | err |= put_user(i, &data32->handle); |
| 104 | |
| 105 | return err; |
| 106 | } |
| 107 | |
| 108 | static int compat_get_ion_custom_data( |
| 109 | struct compat_ion_custom_data __user *data32, |
| 110 | struct ion_custom_data __user *data) |
| 111 | { |
John Stultz | e1d855b | 2013-12-13 19:26:33 -0800 | [diff] [blame] | 112 | compat_uint_t cmd; |
| 113 | compat_ulong_t arg; |
Rom Lemarchand | 827c849 | 2013-12-13 14:24:55 -0800 | [diff] [blame] | 114 | int err; |
| 115 | |
| 116 | err = get_user(cmd, &data32->cmd); |
| 117 | err |= put_user(cmd, &data->cmd); |
| 118 | err |= get_user(arg, &data32->arg); |
| 119 | err |= put_user(arg, &data->arg); |
| 120 | |
| 121 | return err; |
| 122 | }; |
| 123 | |
| 124 | long compat_ion_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) |
| 125 | { |
| 126 | long ret; |
| 127 | |
| 128 | if (!filp->f_op || !filp->f_op->unlocked_ioctl) |
| 129 | return -ENOTTY; |
| 130 | |
| 131 | switch (cmd) { |
John Stultz | 687258f | 2013-12-13 14:24:58 -0800 | [diff] [blame] | 132 | case COMPAT_ION_IOC_ALLOC: |
Rom Lemarchand | 827c849 | 2013-12-13 14:24:55 -0800 | [diff] [blame] | 133 | { |
| 134 | struct compat_ion_allocation_data __user *data32; |
| 135 | struct ion_allocation_data __user *data; |
| 136 | int err; |
| 137 | |
| 138 | data32 = compat_ptr(arg); |
| 139 | data = compat_alloc_user_space(sizeof(*data)); |
| 140 | if (data == NULL) |
| 141 | return -EFAULT; |
| 142 | |
| 143 | err = compat_get_ion_allocation_data(data32, data); |
| 144 | if (err) |
| 145 | return err; |
John Stultz | 687258f | 2013-12-13 14:24:58 -0800 | [diff] [blame] | 146 | ret = filp->f_op->unlocked_ioctl(filp, ION_IOC_ALLOC, |
Rom Lemarchand | 827c849 | 2013-12-13 14:24:55 -0800 | [diff] [blame] | 147 | (unsigned long)data); |
| 148 | err = compat_put_ion_allocation_data(data32, data); |
| 149 | return ret ? ret : err; |
| 150 | } |
John Stultz | 687258f | 2013-12-13 14:24:58 -0800 | [diff] [blame] | 151 | case COMPAT_ION_IOC_FREE: |
Rom Lemarchand | 827c849 | 2013-12-13 14:24:55 -0800 | [diff] [blame] | 152 | { |
Laura Abbott | 8666a87 | 2014-02-04 16:08:39 -0800 | [diff] [blame] | 153 | struct compat_ion_handle_data __user *data32; |
| 154 | struct ion_handle_data __user *data; |
Rom Lemarchand | 827c849 | 2013-12-13 14:24:55 -0800 | [diff] [blame] | 155 | int err; |
| 156 | |
| 157 | data32 = compat_ptr(arg); |
| 158 | data = compat_alloc_user_space(sizeof(*data)); |
| 159 | if (data == NULL) |
| 160 | return -EFAULT; |
| 161 | |
Laura Abbott | 8666a87 | 2014-02-04 16:08:39 -0800 | [diff] [blame] | 162 | err = compat_get_ion_handle_data(data32, data); |
Rom Lemarchand | 827c849 | 2013-12-13 14:24:55 -0800 | [diff] [blame] | 163 | if (err) |
| 164 | return err; |
| 165 | |
John Stultz | 687258f | 2013-12-13 14:24:58 -0800 | [diff] [blame] | 166 | return filp->f_op->unlocked_ioctl(filp, ION_IOC_FREE, |
Rom Lemarchand | 827c849 | 2013-12-13 14:24:55 -0800 | [diff] [blame] | 167 | (unsigned long)data); |
| 168 | } |
John Stultz | 687258f | 2013-12-13 14:24:58 -0800 | [diff] [blame] | 169 | case COMPAT_ION_IOC_CUSTOM: { |
Rom Lemarchand | 827c849 | 2013-12-13 14:24:55 -0800 | [diff] [blame] | 170 | struct compat_ion_custom_data __user *data32; |
| 171 | struct ion_custom_data __user *data; |
| 172 | int err; |
| 173 | |
| 174 | data32 = compat_ptr(arg); |
| 175 | data = compat_alloc_user_space(sizeof(*data)); |
| 176 | if (data == NULL) |
| 177 | return -EFAULT; |
| 178 | |
| 179 | err = compat_get_ion_custom_data(data32, data); |
| 180 | if (err) |
| 181 | return err; |
| 182 | |
John Stultz | 687258f | 2013-12-13 14:24:58 -0800 | [diff] [blame] | 183 | return filp->f_op->unlocked_ioctl(filp, ION_IOC_CUSTOM, |
Rom Lemarchand | 827c849 | 2013-12-13 14:24:55 -0800 | [diff] [blame] | 184 | (unsigned long)data); |
| 185 | } |
| 186 | case ION_IOC_SHARE: |
| 187 | case ION_IOC_MAP: |
| 188 | case ION_IOC_IMPORT: |
| 189 | case ION_IOC_SYNC: |
| 190 | return filp->f_op->unlocked_ioctl(filp, cmd, |
| 191 | (unsigned long)compat_ptr(arg)); |
| 192 | default: |
| 193 | return -ENOIOCTLCMD; |
| 194 | } |
| 195 | } |