diff options
Diffstat (limited to 'drivers/gpu/arm/utgard/linux/mali_ukk_mem.c')
| -rw-r--r-- | drivers/gpu/arm/utgard/linux/mali_ukk_mem.c | 333 |
1 files changed, 333 insertions, 0 deletions
diff --git a/drivers/gpu/arm/utgard/linux/mali_ukk_mem.c b/drivers/gpu/arm/utgard/linux/mali_ukk_mem.c new file mode 100644 index 000000000000..ca1cba0585b3 --- /dev/null +++ b/drivers/gpu/arm/utgard/linux/mali_ukk_mem.c @@ -0,0 +1,333 @@ +/* + * Copyright (C) 2010-2015 ARM Limited. All rights reserved. + * + * This program is free software and is provided to you under the terms of the GNU General Public License version 2 + * as published by the Free Software Foundation, and any use by you of this program is subject to the terms of such GNU licence. + * + * A copy of the licence is included with the program, and can also be obtained from Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + */ +#include <linux/fs.h> /* file system operations */ +#include <asm/uaccess.h> /* user space access */ + +#include "mali_ukk.h" +#include "mali_osk.h" +#include "mali_kernel_common.h" +#include "mali_session.h" +#include "mali_ukk_wrappers.h" + +int mem_alloc_wrapper(struct mali_session_data *session_data, _mali_uk_alloc_mem_s __user *uargs) +{ + _mali_uk_alloc_mem_s kargs; + _mali_osk_errcode_t err; + + MALI_CHECK_NON_NULL(uargs, -EINVAL); + MALI_CHECK_NON_NULL(session_data, -EINVAL); + + if (0 != copy_from_user(&kargs, uargs, sizeof(_mali_uk_alloc_mem_s))) { + return -EFAULT; + } + kargs.ctx = (uintptr_t)session_data; + + err = _mali_ukk_mem_allocate(&kargs); + + if (_MALI_OSK_ERR_OK != err) { + return map_errcode(err); + } + + if (0 != put_user(kargs.backend_handle, &uargs->backend_handle)) { + return -EFAULT; + } + + return 0; +} + +int mem_free_wrapper(struct mali_session_data *session_data, _mali_uk_free_mem_s __user *uargs) +{ + _mali_uk_free_mem_s kargs; + _mali_osk_errcode_t err; + + MALI_CHECK_NON_NULL(uargs, -EINVAL); + MALI_CHECK_NON_NULL(session_data, -EINVAL); + + if (0 != copy_from_user(&kargs, uargs, sizeof(_mali_uk_free_mem_s))) { + return -EFAULT; + } + kargs.ctx = (uintptr_t)session_data; + + err = _mali_ukk_mem_free(&kargs); + + if (_MALI_OSK_ERR_OK != err) { + return map_errcode(err); + } + + if (0 != put_user(kargs.free_pages_nr, &uargs->free_pages_nr)) { + return -EFAULT; + } + + return 0; +} + +int mem_bind_wrapper(struct mali_session_data *session_data, _mali_uk_bind_mem_s __user *uargs) +{ + _mali_uk_bind_mem_s kargs; + _mali_osk_errcode_t err; + + MALI_CHECK_NON_NULL(uargs, -EINVAL); + MALI_CHECK_NON_NULL(session_data, -EINVAL); + + if (0 != copy_from_user(&kargs, uargs, sizeof(_mali_uk_bind_mem_s))) { + return -EFAULT; + } + kargs.ctx = (uintptr_t)session_data; + + err = _mali_ukk_mem_bind(&kargs); + + if (_MALI_OSK_ERR_OK != err) { + return map_errcode(err); + } + + return 0; +} + +int mem_unbind_wrapper(struct mali_session_data *session_data, _mali_uk_unbind_mem_s __user *uargs) +{ + _mali_uk_unbind_mem_s kargs; + _mali_osk_errcode_t err; + + MALI_CHECK_NON_NULL(uargs, -EINVAL); + MALI_CHECK_NON_NULL(session_data, -EINVAL); + + if (0 != copy_from_user(&kargs, uargs, sizeof(_mali_uk_unbind_mem_s))) { + return -EFAULT; + } + kargs.ctx = (uintptr_t)session_data; + + err = _mali_ukk_mem_unbind(&kargs); + + if (_MALI_OSK_ERR_OK != err) { + return map_errcode(err); + } + + return 0; +} + + +int mem_cow_wrapper(struct mali_session_data *session_data, _mali_uk_cow_mem_s __user *uargs) +{ + _mali_uk_cow_mem_s kargs; + _mali_osk_errcode_t err; + + MALI_CHECK_NON_NULL(uargs, -EINVAL); + MALI_CHECK_NON_NULL(session_data, -EINVAL); + + if (0 != copy_from_user(&kargs, uargs, sizeof(_mali_uk_cow_mem_s))) { + return -EFAULT; + } + kargs.ctx = (uintptr_t)session_data; + + err = _mali_ukk_mem_cow(&kargs); + + if (_MALI_OSK_ERR_OK != err) { + return map_errcode(err); + } + + if (0 != put_user(kargs.backend_handle, &uargs->backend_handle)) { + return -EFAULT; + } + + return 0; +} + +int mem_cow_modify_range_wrapper(struct mali_session_data *session_data, _mali_uk_cow_modify_range_s __user *uargs) +{ + _mali_uk_cow_modify_range_s kargs; + _mali_osk_errcode_t err; + + MALI_CHECK_NON_NULL(uargs, -EINVAL); + MALI_CHECK_NON_NULL(session_data, -EINVAL); + + if (0 != copy_from_user(&kargs, uargs, sizeof(_mali_uk_cow_modify_range_s))) { + return -EFAULT; + } + kargs.ctx = (uintptr_t)session_data; + + err = _mali_ukk_mem_cow_modify_range(&kargs); + + if (_MALI_OSK_ERR_OK != err) { + return map_errcode(err); + } + + if (0 != put_user(kargs.change_pages_nr, &uargs->change_pages_nr)) { + return -EFAULT; + } + return 0; +} + + +int mem_resize_mem_wrapper(struct mali_session_data *session_data, _mali_uk_mem_resize_s __user *uargs) +{ + _mali_uk_mem_resize_s kargs; + _mali_osk_errcode_t err; + + MALI_CHECK_NON_NULL(uargs, -EINVAL); + MALI_CHECK_NON_NULL(session_data, -EINVAL); + + if (0 != copy_from_user(&kargs, uargs, sizeof(_mali_uk_mem_resize_s))) { + return -EFAULT; + } + kargs.ctx = (uintptr_t)session_data; + + err = _mali_ukk_mem_resize(&kargs); + + if (_MALI_OSK_ERR_OK != err) { + return map_errcode(err); + } + + return 0; +} + +int mem_write_safe_wrapper(struct mali_session_data *session_data, _mali_uk_mem_write_safe_s __user *uargs) +{ + _mali_uk_mem_write_safe_s kargs; + _mali_osk_errcode_t err; + + MALI_CHECK_NON_NULL(uargs, -EINVAL); + MALI_CHECK_NON_NULL(session_data, -EINVAL); + + if (0 != copy_from_user(&kargs, uargs, sizeof(_mali_uk_mem_write_safe_s))) { + return -EFAULT; + } + + kargs.ctx = (uintptr_t)session_data; + + /* Check if we can access the buffers */ + if (!access_ok(VERIFY_WRITE, kargs.dest, kargs.size) + || !access_ok(VERIFY_READ, kargs.src, kargs.size)) { + return -EINVAL; + } + + /* Check if size wraps */ + if ((kargs.size + kargs.dest) <= kargs.dest + || (kargs.size + kargs.src) <= kargs.src) { + return -EINVAL; + } + + err = _mali_ukk_mem_write_safe(&kargs); + if (_MALI_OSK_ERR_OK != err) { + return map_errcode(err); + } + + if (0 != put_user(kargs.size, &uargs->size)) { + return -EFAULT; + } + + return 0; +} + + + +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) +{ + _mali_uk_query_mmu_page_table_dump_size_s kargs; + _mali_osk_errcode_t err; + + MALI_CHECK_NON_NULL(uargs, -EINVAL); + MALI_CHECK_NON_NULL(session_data, -EINVAL); + + kargs.ctx = (uintptr_t)session_data; + + err = _mali_ukk_query_mmu_page_table_dump_size(&kargs); + if (_MALI_OSK_ERR_OK != err) return map_errcode(err); + + if (0 != put_user(kargs.size, &uargs->size)) return -EFAULT; + + return 0; +} + +int mem_dump_mmu_page_table_wrapper(struct mali_session_data *session_data, _mali_uk_dump_mmu_page_table_s __user *uargs) +{ + _mali_uk_dump_mmu_page_table_s kargs; + _mali_osk_errcode_t err; + void __user *user_buffer; + void *buffer = NULL; + int rc = -EFAULT; + + /* validate input */ + MALI_CHECK_NON_NULL(uargs, -EINVAL); + /* the session_data pointer was validated by caller */ + + if (0 != copy_from_user(&kargs, uargs, sizeof(_mali_uk_dump_mmu_page_table_s))) + goto err_exit; + + user_buffer = (void __user *)(uintptr_t)kargs.buffer; + if (!access_ok(VERIFY_WRITE, user_buffer, kargs.size)) + goto err_exit; + + /* allocate temporary buffer (kernel side) to store mmu page table info */ + if (kargs.size <= 0) + return -EINVAL; + /* Allow at most 8MiB buffers, this is more than enough to dump a fully + * populated page table. */ + if (kargs.size > SZ_8M) + return -EINVAL; + + buffer = (void *)(uintptr_t)_mali_osk_valloc(kargs.size); + if (NULL == buffer) { + rc = -ENOMEM; + goto err_exit; + } + + kargs.ctx = (uintptr_t)session_data; + kargs.buffer = (uintptr_t)buffer; + err = _mali_ukk_dump_mmu_page_table(&kargs); + if (_MALI_OSK_ERR_OK != err) { + rc = map_errcode(err); + goto err_exit; + } + + /* copy mmu page table info back to user space and update pointers */ + if (0 != copy_to_user(user_buffer, buffer, kargs.size)) + goto err_exit; + + kargs.register_writes = kargs.register_writes - + (uintptr_t)buffer + (uintptr_t)user_buffer; + kargs.page_table_dump = kargs.page_table_dump - + (uintptr_t)buffer + (uintptr_t)user_buffer; + + if (0 != copy_to_user(uargs, &kargs, sizeof(kargs))) + goto err_exit; + + rc = 0; + +err_exit: + if (buffer) _mali_osk_vfree(buffer); + return rc; +} + +int mem_usage_get_wrapper(struct mali_session_data *session_data, _mali_uk_profiling_memory_usage_get_s __user *uargs) +{ + _mali_osk_errcode_t err; + _mali_uk_profiling_memory_usage_get_s kargs; + + MALI_CHECK_NON_NULL(uargs, -EINVAL); + MALI_CHECK_NON_NULL(session_data, -EINVAL); + + if (0 != copy_from_user(&kargs, uargs, sizeof(_mali_uk_profiling_memory_usage_get_s))) { + return -EFAULT; + } + + kargs.ctx = (uintptr_t)session_data; + err = _mali_ukk_mem_usage_get(&kargs); + if (_MALI_OSK_ERR_OK != err) { + return map_errcode(err); + } + + kargs.ctx = (uintptr_t)NULL; /* prevent kernel address to be returned to user space */ + if (0 != copy_to_user(uargs, &kargs, sizeof(_mali_uk_profiling_memory_usage_get_s))) { + return -EFAULT; + } + + return 0; +} + |