diff options
Diffstat (limited to 'drivers/gpu/mali400/r3p2/ump/common/ump_kernel_api.c')
| -rw-r--r-- | drivers/gpu/mali400/r3p2/ump/common/ump_kernel_api.c | 548 |
1 files changed, 548 insertions, 0 deletions
diff --git a/drivers/gpu/mali400/r3p2/ump/common/ump_kernel_api.c b/drivers/gpu/mali400/r3p2/ump/common/ump_kernel_api.c new file mode 100644 index 0000000..013f4c6 --- /dev/null +++ b/drivers/gpu/mali400/r3p2/ump/common/ump_kernel_api.c @@ -0,0 +1,548 @@ +/* + * Copyright (C) 2010-2012 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 "mali_osk.h" +#include "mali_osk_list.h" +#include "ump_osk.h" +#include "ump_uk_types.h" +#include "ump_kernel_interface.h" +#include "ump_kernel_common.h" + + + +/* ---------------- UMP kernel space API functions follows ---------------- */ + + + +UMP_KERNEL_API_EXPORT ump_secure_id ump_dd_secure_id_get(ump_dd_handle memh) +{ + ump_dd_mem * mem = (ump_dd_mem *)memh; + + DEBUG_ASSERT_POINTER(mem); + + DBG_MSG(5, ("Returning secure ID. ID: %u\n", mem->secure_id)); + + return mem->secure_id; +} + + + +UMP_KERNEL_API_EXPORT ump_dd_handle ump_dd_handle_create_from_secure_id(ump_secure_id secure_id) +{ + ump_dd_mem * mem; + + _mali_osk_lock_wait(device.secure_id_map_lock, _MALI_OSK_LOCKMODE_RW); + + DBG_MSG(5, ("Getting handle from secure ID. ID: %u\n", secure_id)); + if (0 != ump_descriptor_mapping_get(device.secure_id_map, (int)secure_id, (void**)&mem)) + { + _mali_osk_lock_signal(device.secure_id_map_lock, _MALI_OSK_LOCKMODE_RW); + DBG_MSG(1, ("Secure ID not found. ID: %u\n", secure_id)); + return UMP_DD_HANDLE_INVALID; + } + + ump_dd_reference_add(mem); + + _mali_osk_lock_signal(device.secure_id_map_lock, _MALI_OSK_LOCKMODE_RW); + + return (ump_dd_handle)mem; +} + +/* MALI_SEC */ +UMP_KERNEL_API_EXPORT ump_dd_handle ump_dd_handle_get(ump_secure_id secure_id) +{ + ump_dd_mem * mem; + + _mali_osk_lock_wait(device.secure_id_map_lock, _MALI_OSK_LOCKMODE_RW); + + DBG_MSG(5, ("Getting handle from secure ID. ID: %u\n", secure_id)); + if (0 != ump_descriptor_mapping_get(device.secure_id_map, (int)secure_id, (void**)&mem)) + { + _mali_osk_lock_signal(device.secure_id_map_lock, _MALI_OSK_LOCKMODE_RW); + DBG_MSG(1, ("Secure ID not found. ID: %u\n", secure_id)); + return UMP_DD_HANDLE_INVALID; + } + + _mali_osk_lock_signal(device.secure_id_map_lock, _MALI_OSK_LOCKMODE_RW); + + return (ump_dd_handle)mem; +} + +UMP_KERNEL_API_EXPORT unsigned long ump_dd_phys_block_count_get(ump_dd_handle memh) +{ + ump_dd_mem * mem = (ump_dd_mem*) memh; + + DEBUG_ASSERT_POINTER(mem); + + return mem->nr_blocks; +} + + + +UMP_KERNEL_API_EXPORT ump_dd_status_code ump_dd_phys_blocks_get(ump_dd_handle memh, ump_dd_physical_block * blocks, unsigned long num_blocks) +{ + ump_dd_mem * mem = (ump_dd_mem *)memh; + + DEBUG_ASSERT_POINTER(mem); + + if (blocks == NULL) + { + DBG_MSG(1, ("NULL parameter in ump_dd_phys_blocks_get()\n")); + return UMP_DD_INVALID; + } + + if (mem->nr_blocks != num_blocks) + { + DBG_MSG(1, ("Specified number of blocks do not match actual number of blocks\n")); + return UMP_DD_INVALID; + } + + DBG_MSG(5, ("Returning physical block information. ID: %u\n", mem->secure_id)); + + _mali_osk_memcpy(blocks, mem->block_array, sizeof(ump_dd_physical_block) * mem->nr_blocks); + + return UMP_DD_SUCCESS; +} + + + +UMP_KERNEL_API_EXPORT ump_dd_status_code ump_dd_phys_block_get(ump_dd_handle memh, unsigned long index, ump_dd_physical_block * block) +{ + ump_dd_mem * mem = (ump_dd_mem *)memh; + + DEBUG_ASSERT_POINTER(mem); + + if (block == NULL) + { + DBG_MSG(1, ("NULL parameter in ump_dd_phys_block_get()\n")); + return UMP_DD_INVALID; + } + + if (index >= mem->nr_blocks) + { + DBG_MSG(5, ("Invalid index specified in ump_dd_phys_block_get()\n")); + return UMP_DD_INVALID; + } + + DBG_MSG(5, ("Returning physical block information. ID: %u, index: %lu\n", mem->secure_id, index)); + + *block = mem->block_array[index]; + + return UMP_DD_SUCCESS; +} + + + +UMP_KERNEL_API_EXPORT unsigned long ump_dd_size_get(ump_dd_handle memh) +{ + ump_dd_mem * mem = (ump_dd_mem*)memh; + + DEBUG_ASSERT_POINTER(mem); + + DBG_MSG(5, ("Returning size. ID: %u, size: %lu\n", mem->secure_id, mem->size_bytes)); + + return mem->size_bytes; +} + + + +UMP_KERNEL_API_EXPORT void ump_dd_reference_add(ump_dd_handle memh) +{ + ump_dd_mem * mem = (ump_dd_mem*)memh; + int new_ref; + + DEBUG_ASSERT_POINTER(mem); + + new_ref = _ump_osk_atomic_inc_and_read(&mem->ref_count); + + DBG_MSG(5, ("Memory reference incremented. ID: %u, new value: %d\n", mem->secure_id, new_ref)); +} + + + +UMP_KERNEL_API_EXPORT void ump_dd_reference_release(ump_dd_handle memh) +{ + int new_ref; + ump_dd_mem * mem = (ump_dd_mem*)memh; + + DEBUG_ASSERT_POINTER(mem); + + /* We must hold this mutex while doing the atomic_dec_and_read, to protect + that elements in the ump_descriptor_mapping table is always valid. If they + are not, userspace may accidently map in this secure_ids right before its freed + giving a mapped backdoor into unallocated memory.*/ + _mali_osk_lock_wait(device.secure_id_map_lock, _MALI_OSK_LOCKMODE_RW); + + new_ref = _ump_osk_atomic_dec_and_read(&mem->ref_count); + + DBG_MSG(5, ("Memory reference decremented. ID: %u, new value: %d\n", mem->secure_id, new_ref)); + + if (0 == new_ref) + { + DBG_MSG(3, ("Final release of memory. ID: %u\n", mem->secure_id)); + + ump_descriptor_mapping_free(device.secure_id_map, (int)mem->secure_id); + + _mali_osk_lock_signal(device.secure_id_map_lock, _MALI_OSK_LOCKMODE_RW); + mem->release_func(mem->ctx, mem); + _mali_osk_free(mem); + } + else + { + _mali_osk_lock_signal(device.secure_id_map_lock, _MALI_OSK_LOCKMODE_RW); + } +} + + + +/* --------------- Handling of user space requests follows --------------- */ + + +_mali_osk_errcode_t _ump_uku_get_api_version( _ump_uk_api_version_s *args ) +{ + ump_session_data * session_data; + + DEBUG_ASSERT_POINTER( args ); + DEBUG_ASSERT_POINTER( args->ctx ); + + session_data = (ump_session_data *)args->ctx; + + /* check compatability */ + if (args->version == UMP_IOCTL_API_VERSION) + { + DBG_MSG(3, ("API version set to newest %d (compatible)\n", GET_VERSION(args->version))); + args->compatible = 1; + session_data->api_version = args->version; + } + else if (args->version == MAKE_VERSION_ID(1)) + { + DBG_MSG(2, ("API version set to depricated: %d (compatible)\n", GET_VERSION(args->version))); + args->compatible = 1; + session_data->api_version = args->version; + } + else + { + DBG_MSG(2, ("API version set to %d (incompatible with client version %d)\n", GET_VERSION(UMP_IOCTL_API_VERSION), GET_VERSION(args->version))); + args->compatible = 0; + args->version = UMP_IOCTL_API_VERSION; /* report our version */ + } + + return _MALI_OSK_ERR_OK; +} + + +_mali_osk_errcode_t _ump_ukk_release( _ump_uk_release_s *release_info ) +{ + ump_session_memory_list_element * session_memory_element; + ump_session_memory_list_element * tmp; + ump_session_data * session_data; + _mali_osk_errcode_t ret = _MALI_OSK_ERR_INVALID_FUNC; + int secure_id; + + DEBUG_ASSERT_POINTER( release_info ); + DEBUG_ASSERT_POINTER( release_info->ctx ); + + /* Retreive the session data */ + session_data = (ump_session_data*)release_info->ctx; + + /* If there are many items in the memory session list we + * could be de-referencing this pointer a lot so keep a local copy + */ + secure_id = release_info->secure_id; + + DBG_MSG(4, ("Releasing memory with IOCTL, ID: %u\n", secure_id)); + + /* Iterate through the memory list looking for the requested secure ID */ + _mali_osk_lock_wait(session_data->lock, _MALI_OSK_LOCKMODE_RW); + _MALI_OSK_LIST_FOREACHENTRY(session_memory_element, tmp, &session_data->list_head_session_memory_list, ump_session_memory_list_element, list) + { + if ( session_memory_element->mem->secure_id == secure_id) + { + ump_dd_mem *release_mem; + + release_mem = session_memory_element->mem; + _mali_osk_list_del(&session_memory_element->list); + ump_dd_reference_release(release_mem); + _mali_osk_free(session_memory_element); + + ret = _MALI_OSK_ERR_OK; + break; + } + } + + _mali_osk_lock_signal(session_data->lock, _MALI_OSK_LOCKMODE_RW); + DBG_MSG_IF(1, _MALI_OSK_ERR_OK != ret, ("UMP memory with ID %u does not belong to this session.\n", secure_id)); + + DBG_MSG(4, ("_ump_ukk_release() returning 0x%x\n", ret)); + return ret; +} + +_mali_osk_errcode_t _ump_ukk_size_get( _ump_uk_size_get_s *user_interaction ) +{ + ump_dd_mem * mem; + _mali_osk_errcode_t ret = _MALI_OSK_ERR_FAULT; + + DEBUG_ASSERT_POINTER( user_interaction ); + + /* We lock the mappings so things don't get removed while we are looking for the memory */ + _mali_osk_lock_wait(device.secure_id_map_lock, _MALI_OSK_LOCKMODE_RW); + if (0 == ump_descriptor_mapping_get(device.secure_id_map, (int)user_interaction->secure_id, (void**)&mem)) + { + user_interaction->size = mem->size_bytes; + DBG_MSG(4, ("Returning size. ID: %u, size: %lu ", (ump_secure_id)user_interaction->secure_id, (unsigned long)user_interaction->size)); + ret = _MALI_OSK_ERR_OK; + } + else + { + user_interaction->size = 0; + DBG_MSG(1, ("Failed to look up mapping in ump_ioctl_size_get(). ID: %u\n", (ump_secure_id)user_interaction->secure_id)); + } + + _mali_osk_lock_signal(device.secure_id_map_lock, _MALI_OSK_LOCKMODE_RW); + return ret; +} + + + +void _ump_ukk_msync( _ump_uk_msync_s *args ) +{ + ump_dd_mem * mem = NULL; + void *virtual = NULL; + u32 size = 0; + u32 offset = 0; + + _mali_osk_lock_wait(device.secure_id_map_lock, _MALI_OSK_LOCKMODE_RW); + ump_descriptor_mapping_get(device.secure_id_map, (int)args->secure_id, (void**)&mem); + + if (NULL == mem) + { + _mali_osk_lock_signal(device.secure_id_map_lock, _MALI_OSK_LOCKMODE_RW); + DBG_MSG(1, ("Failed to look up mapping in _ump_ukk_msync(). ID: %u\n", (ump_secure_id)args->secure_id)); + return; + } + /* Ensure the memory doesn't dissapear when we are flushing it. */ + ump_dd_reference_add(mem); + _mali_osk_lock_signal(device.secure_id_map_lock, _MALI_OSK_LOCKMODE_RW); + + /* Returns the cache settings back to Userspace */ + args->is_cached=mem->is_cached; + + /* If this flag is the only one set, we should not do the actual flush, only the readout */ + if ( _UMP_UK_MSYNC_READOUT_CACHE_ENABLED==args->op ) + { + DBG_MSG(3, ("_ump_ukk_msync READOUT ID: %u Enabled: %d\n", (ump_secure_id)args->secure_id, mem->is_cached)); + goto msync_release_and_return; + } + + /* Nothing to do if the memory is not caches */ + if ( 0==mem->is_cached ) + { + DBG_MSG(3, ("_ump_ukk_msync IGNORING ID: %u Enabled: %d OP: %d\n", (ump_secure_id)args->secure_id, mem->is_cached, args->op)); + goto msync_release_and_return; + } + DBG_MSG(3, ("UMP[%02u] _ump_ukk_msync Flush OP: %d Address: 0x%08x Mapping: 0x%08x\n", + (ump_secure_id)args->secure_id, args->op, args->address, args->mapping)); + + if ( args->address ) + { + virtual = (void *)((u32)args->address); + offset = (u32)((args->address) - (args->mapping)); + } else { + /* Flush entire mapping when no address is specified. */ + virtual = args->mapping; + } + if ( args->size ) + { + size = args->size; + } else { + /* Flush entire mapping when no size is specified. */ + size = mem->size_bytes - offset; + } + + if ( (offset + size) > mem->size_bytes ) + { + DBG_MSG(1, ("Trying to flush more than the entire UMP allocation: offset: %u + size: %u > %u\n", offset, size, mem->size_bytes)); + goto msync_release_and_return; + } + + /* The actual cache flush - Implemented for each OS*/ + _ump_osk_msync( mem, virtual, offset, size, args->op, NULL); + +msync_release_and_return: + ump_dd_reference_release(mem); + return; +} + +void _ump_ukk_cache_operations_control(_ump_uk_cache_operations_control_s* args) +{ + ump_session_data * session_data; + ump_uk_cache_op_control op; + + DEBUG_ASSERT_POINTER( args ); + DEBUG_ASSERT_POINTER( args->ctx ); + + op = args->op; + session_data = (ump_session_data *)args->ctx; + + _mali_osk_lock_wait(session_data->lock, _MALI_OSK_LOCKMODE_RW); + if ( op== _UMP_UK_CACHE_OP_START ) + { + session_data->cache_operations_ongoing++; + DBG_MSG(4, ("Cache ops start\n" )); + if ( session_data->cache_operations_ongoing != 1 ) + { + DBG_MSG(2, ("UMP: Number of simultanious cache control ops: %d\n", session_data->cache_operations_ongoing) ); + } + } + else if ( op== _UMP_UK_CACHE_OP_FINISH ) + { + DBG_MSG(4, ("Cache ops finish\n")); + session_data->cache_operations_ongoing--; + #if 0 + if ( session_data->has_pending_level1_cache_flush) + { + /* This function will set has_pending_level1_cache_flush=0 */ + _ump_osk_msync( NULL, NULL, 0, 0, _UMP_UK_MSYNC_FLUSH_L1, session_data); + } + #endif + + /* to be on the safe side: always flush l1 cache when cache operations are done */ + _ump_osk_msync( NULL, NULL, 0, 0, _UMP_UK_MSYNC_FLUSH_L1, session_data); + DBG_MSG(4, ("Cache ops finish end\n" )); + } + else + { + DBG_MSG(1, ("Illegal call to %s at line %d\n", __FUNCTION__, __LINE__)); + } + _mali_osk_lock_signal(session_data->lock, _MALI_OSK_LOCKMODE_RW); + +} + +void _ump_ukk_switch_hw_usage(_ump_uk_switch_hw_usage_s *args ) +{ + ump_dd_mem * mem = NULL; + ump_uk_user old_user; + ump_uk_msync_op cache_op = _UMP_UK_MSYNC_CLEAN_AND_INVALIDATE; + ump_session_data *session_data; + + DEBUG_ASSERT_POINTER( args ); + DEBUG_ASSERT_POINTER( args->ctx ); + + session_data = (ump_session_data *)args->ctx; + + _mali_osk_lock_wait(device.secure_id_map_lock, _MALI_OSK_LOCKMODE_RW); + ump_descriptor_mapping_get(device.secure_id_map, (int)args->secure_id, (void**)&mem); + + if (NULL == mem) + { + _mali_osk_lock_signal(device.secure_id_map_lock, _MALI_OSK_LOCKMODE_RW); + DBG_MSG(1, ("Failed to look up mapping in _ump_ukk_switch_hw_usage(). ID: %u\n", (ump_secure_id)args->secure_id)); + return; + } + + old_user = mem->hw_device; + mem->hw_device = args->new_user; + + DBG_MSG(3, ("UMP[%02u] Switch usage Start New: %s Prev: %s.\n", (ump_secure_id)args->secure_id, args->new_user?"MALI":"CPU",old_user?"MALI":"CPU")); + + if ( ! mem->is_cached ) + { + _mali_osk_lock_signal(device.secure_id_map_lock, _MALI_OSK_LOCKMODE_RW); + DBG_MSG(3, ("UMP[%02u] Changing owner of uncached memory. Cache flushing not needed.\n", (ump_secure_id)args->secure_id)); + return; + } + + if ( old_user == args->new_user) + { + _mali_osk_lock_signal(device.secure_id_map_lock, _MALI_OSK_LOCKMODE_RW); + DBG_MSG(4, ("UMP[%02u] Setting the new_user equal to previous for. Cache flushing not needed.\n", (ump_secure_id)args->secure_id)); + return; + } + if ( + /* Previous AND new is both different from CPU */ + (old_user != _UMP_UK_USED_BY_CPU) && (args->new_user != _UMP_UK_USED_BY_CPU ) + ) + { + _mali_osk_lock_signal(device.secure_id_map_lock, _MALI_OSK_LOCKMODE_RW); + DBG_MSG(4, ("UMP[%02u] Previous and new user is not CPU. Cache flushing not needed.\n", (ump_secure_id)args->secure_id)); + return; + } + + if ( (old_user != _UMP_UK_USED_BY_CPU ) && (args->new_user==_UMP_UK_USED_BY_CPU) ) + { + cache_op =_UMP_UK_MSYNC_INVALIDATE; + DBG_MSG(4, ("UMP[%02u] Cache invalidation needed\n", (ump_secure_id)args->secure_id)); +#ifdef UMP_SKIP_INVALIDATION +#error + _mali_osk_lock_signal(device.secure_id_map_lock, _MALI_OSK_LOCKMODE_RW); + DBG_MSG(4, ("UMP[%02u] Performing Cache invalidation SKIPPED\n", (ump_secure_id)args->secure_id)); + return; +#endif + } + /* Ensure the memory doesn't dissapear when we are flushing it. */ + ump_dd_reference_add(mem); + _mali_osk_lock_signal(device.secure_id_map_lock, _MALI_OSK_LOCKMODE_RW); + + /* Take lock to protect: session->cache_operations_ongoing and session->has_pending_level1_cache_flush */ + _mali_osk_lock_wait(session_data->lock, _MALI_OSK_LOCKMODE_RW); + /* Actual cache flush */ + _ump_osk_msync( mem, NULL, 0, mem->size_bytes, cache_op, session_data); + _mali_osk_lock_signal(session_data->lock, _MALI_OSK_LOCKMODE_RW); + + ump_dd_reference_release(mem); + DBG_MSG(4, ("UMP[%02u] Switch usage Finish\n", (ump_secure_id)args->secure_id)); + return; +} + +void _ump_ukk_lock(_ump_uk_lock_s *args ) +{ + ump_dd_mem * mem = NULL; + + _mali_osk_lock_wait(device.secure_id_map_lock, _MALI_OSK_LOCKMODE_RW); + ump_descriptor_mapping_get(device.secure_id_map, (int)args->secure_id, (void**)&mem); + + if (NULL == mem) + { + _mali_osk_lock_signal(device.secure_id_map_lock, _MALI_OSK_LOCKMODE_RW); + DBG_MSG(1, ("UMP[%02u] Failed to look up mapping in _ump_ukk_lock(). ID: %u\n", (ump_secure_id)args->secure_id)); + return; + } + ump_dd_reference_add(mem); + _mali_osk_lock_signal(device.secure_id_map_lock, _MALI_OSK_LOCKMODE_RW); + + DBG_MSG(1, ("UMP[%02u] Lock. New lock flag: %d. Old Lock flag:\n", (u32)args->secure_id, (u32)args->lock_usage, (u32) mem->lock_usage )); + + mem->lock_usage = (ump_lock_usage) args->lock_usage; + + ump_dd_reference_release(mem); +} + +void _ump_ukk_unlock(_ump_uk_unlock_s *args ) +{ + ump_dd_mem * mem = NULL; + + _mali_osk_lock_wait(device.secure_id_map_lock, _MALI_OSK_LOCKMODE_RW); + ump_descriptor_mapping_get(device.secure_id_map, (int)args->secure_id, (void**)&mem); + + if (NULL == mem) + { + _mali_osk_lock_signal(device.secure_id_map_lock, _MALI_OSK_LOCKMODE_RW); + DBG_MSG(1, ("Failed to look up mapping in _ump_ukk_unlock(). ID: %u\n", (ump_secure_id)args->secure_id)); + return; + } + ump_dd_reference_add(mem); + _mali_osk_lock_signal(device.secure_id_map_lock, _MALI_OSK_LOCKMODE_RW); + + DBG_MSG(1, ("UMP[%02u] Unlocking. Old Lock flag:\n", (u32)args->secure_id, (u32) mem->lock_usage )); + + mem->lock_usage = (ump_lock_usage) UMP_NOT_LOCKED; + + ump_dd_reference_release(mem); +} |