2 * Copyright (C) 2010-2012 ARM Limited. All rights reserved.
4 * This program is free software and is provided to you under the terms of the GNU General Public License version 2
5 * as published by the Free Software Foundation, and any use by you of this program is subject to the terms of such GNU licence.
7 * A copy of the licence is included with the program, and can also be obtained from Free Software
8 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
10 #include <linux/fs.h> /* file system operations */
11 #include <asm/uaccess.h> /* user space access */
15 #include "mali_kernel_common.h"
16 #include "mali_session.h"
17 #include "mali_ukk_wrappers.h"
19 int mem_write_safe_wrapper(struct mali_session_data *session_data, _mali_uk_mem_write_safe_s __user * uargs)
21 _mali_uk_mem_write_safe_s kargs;
22 _mali_osk_errcode_t err;
24 MALI_CHECK_NON_NULL(uargs, -EINVAL);
25 MALI_CHECK_NON_NULL(session_data, -EINVAL);
27 if (0 != copy_from_user(&kargs, uargs, sizeof(_mali_uk_mem_write_safe_s))) {
31 kargs.ctx = session_data;
33 /* Check if we can access the buffers */
34 if (!access_ok(VERIFY_WRITE, kargs.dest, kargs.size)
35 || !access_ok(VERIFY_READ, kargs.src, kargs.size)) {
39 /* Check if size wraps */
40 if ((kargs.size + kargs.dest) <= kargs.dest
41 || (kargs.size + kargs.src) <= kargs.src) {
45 err = _mali_ukk_mem_write_safe(&kargs);
46 if (_MALI_OSK_ERR_OK != err) {
47 return map_errcode(err);
50 if (0 != put_user(kargs.size, &uargs->size)) {
57 int mem_map_ext_wrapper(struct mali_session_data *session_data, _mali_uk_map_external_mem_s __user * argument)
59 _mali_uk_map_external_mem_s uk_args;
60 _mali_osk_errcode_t err_code;
63 /* the session_data pointer was validated by caller */
64 MALI_CHECK_NON_NULL( argument, -EINVAL);
66 /* get call arguments from user space. copy_from_user returns how many bytes which where NOT copied */
67 if ( 0 != copy_from_user(&uk_args, (void __user *)argument, sizeof(_mali_uk_map_external_mem_s)) ) {
71 uk_args.ctx = session_data;
72 err_code = _mali_ukk_map_external_mem( &uk_args );
74 if (0 != put_user(uk_args.cookie, &argument->cookie)) {
75 if (_MALI_OSK_ERR_OK == err_code) {
77 _mali_uk_unmap_external_mem_s uk_args_unmap;
79 uk_args_unmap.ctx = session_data;
80 uk_args_unmap.cookie = uk_args.cookie;
81 err_code = _mali_ukk_unmap_external_mem( &uk_args_unmap );
82 if (_MALI_OSK_ERR_OK != err_code) {
83 MALI_DEBUG_PRINT(4, ("reverting _mali_ukk_unmap_external_mem, as a result of failing put_user(), failed\n"));
89 /* Return the error that _mali_ukk_free_big_block produced */
90 return map_errcode(err_code);
93 int mem_unmap_ext_wrapper(struct mali_session_data *session_data, _mali_uk_unmap_external_mem_s __user * argument)
95 _mali_uk_unmap_external_mem_s uk_args;
96 _mali_osk_errcode_t err_code;
99 /* the session_data pointer was validated by caller */
100 MALI_CHECK_NON_NULL( argument, -EINVAL);
102 /* get call arguments from user space. copy_from_user returns how many bytes which where NOT copied */
103 if ( 0 != copy_from_user(&uk_args, (void __user *)argument, sizeof(_mali_uk_unmap_external_mem_s)) ) {
107 uk_args.ctx = session_data;
108 err_code = _mali_ukk_unmap_external_mem( &uk_args );
110 /* Return the error that _mali_ukk_free_big_block produced */
111 return map_errcode(err_code);
114 #if defined(CONFIG_MALI400_UMP)
115 int mem_release_ump_wrapper(struct mali_session_data *session_data, _mali_uk_release_ump_mem_s __user * argument)
117 _mali_uk_release_ump_mem_s uk_args;
118 _mali_osk_errcode_t err_code;
121 /* the session_data pointer was validated by caller */
122 MALI_CHECK_NON_NULL( argument, -EINVAL);
124 /* get call arguments from user space. copy_from_user returns how many bytes which where NOT copied */
125 if ( 0 != copy_from_user(&uk_args, (void __user *)argument, sizeof(_mali_uk_release_ump_mem_s)) ) {
129 uk_args.ctx = session_data;
130 err_code = _mali_ukk_release_ump_mem( &uk_args );
132 /* Return the error that _mali_ukk_free_big_block produced */
133 return map_errcode(err_code);
136 int mem_attach_ump_wrapper(struct mali_session_data *session_data, _mali_uk_attach_ump_mem_s __user * argument)
138 _mali_uk_attach_ump_mem_s uk_args;
139 _mali_osk_errcode_t err_code;
142 /* the session_data pointer was validated by caller */
143 MALI_CHECK_NON_NULL( argument, -EINVAL);
145 /* get call arguments from user space. copy_from_user returns how many bytes which where NOT copied */
146 if ( 0 != copy_from_user(&uk_args, (void __user *)argument, sizeof(_mali_uk_attach_ump_mem_s)) ) {
150 uk_args.ctx = session_data;
151 err_code = _mali_ukk_attach_ump_mem( &uk_args );
153 if (0 != put_user(uk_args.cookie, &argument->cookie)) {
154 if (_MALI_OSK_ERR_OK == err_code) {
156 _mali_uk_release_ump_mem_s uk_args_unmap;
158 uk_args_unmap.ctx = session_data;
159 uk_args_unmap.cookie = uk_args.cookie;
160 err_code = _mali_ukk_release_ump_mem( &uk_args_unmap );
161 if (_MALI_OSK_ERR_OK != err_code) {
162 MALI_DEBUG_PRINT(4, ("reverting _mali_ukk_attach_mem, as a result of failing put_user(), failed\n"));
168 /* Return the error that _mali_ukk_map_external_ump_mem produced */
169 return map_errcode(err_code);
171 #endif /* CONFIG_MALI400_UMP */
173 int mem_query_mmu_page_table_dump_size_wrapper(struct mali_session_data *session_data, _mali_uk_query_mmu_page_table_dump_size_s __user * uargs)
175 _mali_uk_query_mmu_page_table_dump_size_s kargs;
176 _mali_osk_errcode_t err;
178 MALI_CHECK_NON_NULL(uargs, -EINVAL);
179 MALI_CHECK_NON_NULL(session_data, -EINVAL);
181 kargs.ctx = session_data;
183 err = _mali_ukk_query_mmu_page_table_dump_size(&kargs);
184 if (_MALI_OSK_ERR_OK != err) return map_errcode(err);
186 if (0 != put_user(kargs.size, &uargs->size)) return -EFAULT;
191 int mem_dump_mmu_page_table_wrapper(struct mali_session_data *session_data, _mali_uk_dump_mmu_page_table_s __user * uargs)
193 _mali_uk_dump_mmu_page_table_s kargs;
194 _mali_osk_errcode_t err;
199 MALI_CHECK_NON_NULL(uargs, -EINVAL);
200 /* the session_data pointer was validated by caller */
204 /* get location of user buffer */
205 if (0 != get_user(buffer, &uargs->buffer)) goto err_exit;
206 /* get size of mmu page table info buffer from user space */
207 if ( 0 != get_user(kargs.size, &uargs->size) ) goto err_exit;
208 /* verify we can access the whole of the user buffer */
209 if (!access_ok(VERIFY_WRITE, buffer, kargs.size)) goto err_exit;
211 /* allocate temporary buffer (kernel side) to store mmu page table info */
212 MALI_CHECK(kargs.size > 0, -ENOMEM);
213 kargs.buffer = _mali_osk_valloc(kargs.size);
214 if (NULL == kargs.buffer) {
219 kargs.ctx = session_data;
220 err = _mali_ukk_dump_mmu_page_table(&kargs);
221 if (_MALI_OSK_ERR_OK != err) {
222 rc = map_errcode(err);
226 /* copy mmu page table info back to user space and update pointers */
227 if (0 != copy_to_user(uargs->buffer, kargs.buffer, kargs.size) ) goto err_exit;
228 if (0 != put_user((kargs.register_writes - (u32 *)kargs.buffer) + (u32 *)uargs->buffer, &uargs->register_writes)) goto err_exit;
229 if (0 != put_user((kargs.page_table_dump - (u32 *)kargs.buffer) + (u32 *)uargs->buffer, &uargs->page_table_dump)) goto err_exit;
230 if (0 != put_user(kargs.register_writes_size, &uargs->register_writes_size)) goto err_exit;
231 if (0 != put_user(kargs.page_table_dump_size, &uargs->page_table_dump_size)) goto err_exit;
235 if (kargs.buffer) _mali_osk_vfree(kargs.buffer);