diff options
Diffstat (limited to 'drivers/gpu/mali/ump/common/ump_kernel_ref_drv.c')
| -rw-r--r-- | drivers/gpu/mali/ump/common/ump_kernel_ref_drv.c | 181 |
1 files changed, 181 insertions, 0 deletions
diff --git a/drivers/gpu/mali/ump/common/ump_kernel_ref_drv.c b/drivers/gpu/mali/ump/common/ump_kernel_ref_drv.c new file mode 100644 index 00000000..aa08c17a --- /dev/null +++ b/drivers/gpu/mali/ump/common/ump_kernel_ref_drv.c @@ -0,0 +1,181 @@ +/* + * Copyright (C) 2010-2014 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_ref_drv.h" +#include "ump_kernel_common.h" +#include "ump_kernel_descriptor_mapping.h" + +#define UMP_MINIMUM_SIZE 4096 +#define UMP_MINIMUM_SIZE_MASK (~(UMP_MINIMUM_SIZE-1)) +#define UMP_SIZE_ALIGN(x) (((x)+UMP_MINIMUM_SIZE-1)&UMP_MINIMUM_SIZE_MASK) +#define UMP_ADDR_ALIGN_OFFSET(x) ((x)&(UMP_MINIMUM_SIZE-1)) +static void phys_blocks_release(void *ctx, struct ump_dd_mem *descriptor); + +UMP_KERNEL_API_EXPORT ump_dd_handle ump_dd_handle_create_from_phys_blocks(ump_dd_physical_block *blocks, unsigned long num_blocks) +{ + ump_dd_mem *mem; + unsigned long size_total = 0; + int ret; + u32 i; + + /* Go through the input blocks and verify that they are sane */ + for (i = 0; i < num_blocks; i++) { + unsigned long addr = blocks[i].addr; + unsigned long size = blocks[i].size; + + DBG_MSG(5, ("Adding physical memory to new handle. Address: 0x%08lx, size: %lu\n", addr, size)); + size_total += blocks[i].size; + + if (0 != UMP_ADDR_ALIGN_OFFSET(addr)) { + MSG_ERR(("Trying to create UMP memory from unaligned physical address. Address: 0x%08lx\n", addr)); + return UMP_DD_HANDLE_INVALID; + } + + if (0 != UMP_ADDR_ALIGN_OFFSET(size)) { + MSG_ERR(("Trying to create UMP memory with unaligned size. Size: %lu\n", size)); + return UMP_DD_HANDLE_INVALID; + } + } + + /* Allocate the ump_dd_mem struct for this allocation */ + mem = _mali_osk_malloc(sizeof(*mem)); + if (NULL == mem) { + DBG_MSG(1, ("Could not allocate ump_dd_mem in ump_dd_handle_create_from_phys_blocks()\n")); + return UMP_DD_HANDLE_INVALID; + } + + /* Now, make a copy of the block information supplied by the user */ + mem->block_array = _mali_osk_malloc(sizeof(ump_dd_physical_block) * num_blocks); + if (NULL == mem->block_array) { + _mali_osk_free(mem); + DBG_MSG(1, ("Could not allocate a mem handle for function ump_dd_handle_create_from_phys_blocks().\n")); + return UMP_DD_HANDLE_INVALID; + } + + _mali_osk_memcpy(mem->block_array, blocks, sizeof(ump_dd_physical_block) * num_blocks); + + /* And setup the rest of the ump_dd_mem struct */ + _mali_osk_atomic_init(&mem->ref_count, 1); + mem->size_bytes = size_total; + mem->nr_blocks = num_blocks; + mem->backend_info = NULL; + mem->ctx = NULL; + mem->release_func = phys_blocks_release; + /* For now UMP handles created by ump_dd_handle_create_from_phys_blocks() is forced to be Uncached */ + mem->is_cached = 0; + mem->hw_device = _UMP_UK_USED_BY_CPU; + mem->lock_usage = UMP_NOT_LOCKED; + + /* Find a secure ID for this allocation */ + ret = ump_random_mapping_insert(device.secure_id_map, mem); + if (unlikely(ret)) { + _mali_osk_free(mem->block_array); + _mali_osk_free(mem); + DBG_MSG(1, ("Failed to allocate secure ID in ump_dd_handle_create_from_phys_blocks()\n")); + return UMP_DD_HANDLE_INVALID; + } + + DBG_MSG(3, ("UMP memory created. ID: %u, size: %lu\n", mem->secure_id, mem->size_bytes)); + + return (ump_dd_handle)mem; +} + +static void phys_blocks_release(void *ctx, struct ump_dd_mem *descriptor) +{ + _mali_osk_free(descriptor->block_array); + descriptor->block_array = NULL; +} + +_mali_osk_errcode_t _ump_ukk_allocate(_ump_uk_allocate_s *user_interaction) +{ + ump_session_data *session_data = NULL; + ump_dd_mem *new_allocation = NULL; + ump_session_memory_list_element *session_memory_element = NULL; + int ret; + + DEBUG_ASSERT_POINTER(user_interaction); + DEBUG_ASSERT_POINTER(user_interaction->ctx); + + session_data = (ump_session_data *) user_interaction->ctx; + + session_memory_element = _mali_osk_calloc(1, sizeof(ump_session_memory_list_element)); + if (NULL == session_memory_element) { + DBG_MSG(1, ("Failed to allocate ump_session_memory_list_element in ump_ioctl_allocate()\n")); + return _MALI_OSK_ERR_NOMEM; + } + + + new_allocation = _mali_osk_calloc(1, sizeof(ump_dd_mem)); + if (NULL == new_allocation) { + _mali_osk_free(session_memory_element); + DBG_MSG(1, ("Failed to allocate ump_dd_mem in _ump_ukk_allocate()\n")); + return _MALI_OSK_ERR_NOMEM; + } + + /* Initialize the part of the new_allocation that we know so for */ + _mali_osk_atomic_init(&new_allocation->ref_count, 1); + if (0 == (UMP_REF_DRV_UK_CONSTRAINT_USE_CACHE & user_interaction->constraints)) + new_allocation->is_cached = 0; + else new_allocation->is_cached = 1; + + /* Special case a size of 0, we should try to emulate what malloc does + * in this case, which is to return a valid pointer that must be freed, + * but can't be dereferenced */ + if (0 == user_interaction->size) { + /* Emulate by actually allocating the minimum block size */ + user_interaction->size = 1; + } + + /* Page align the size */ + new_allocation->size_bytes = UMP_SIZE_ALIGN(user_interaction->size); + new_allocation->lock_usage = UMP_NOT_LOCKED; + + /* Now, ask the active memory backend to do the actual memory allocation */ + if (!device.backend->allocate(device.backend->ctx, new_allocation)) { + DBG_MSG(3, ("OOM: No more UMP memory left. Failed to allocate memory in ump_ioctl_allocate(). Size: %lu, requested size: %lu\n", + new_allocation->size_bytes, + (unsigned long)user_interaction->size)); + _mali_osk_free(new_allocation); + _mali_osk_free(session_memory_element); + return _MALI_OSK_ERR_INVALID_FUNC; + } + new_allocation->hw_device = _UMP_UK_USED_BY_CPU; + new_allocation->ctx = device.backend->ctx; + new_allocation->release_func = device.backend->release; + + /* Initialize the session_memory_element, and add it to the session object */ + session_memory_element->mem = new_allocation; + _mali_osk_mutex_wait(session_data->lock); + _mali_osk_list_add(&(session_memory_element->list), &(session_data->list_head_session_memory_list)); + _mali_osk_mutex_signal(session_data->lock); + + /* Create a secure ID for this allocation */ + ret = ump_random_mapping_insert(device.secure_id_map, new_allocation); + if (unlikely(ret)) { + new_allocation->release_func(new_allocation->ctx, new_allocation); + _mali_osk_free(session_memory_element); + _mali_osk_free(new_allocation); + DBG_MSG(1, ("Failed to allocate secure ID in ump_ioctl_allocate()\n")); + return _MALI_OSK_ERR_INVALID_FUNC; + } + + user_interaction->secure_id = new_allocation->secure_id; + user_interaction->size = new_allocation->size_bytes; + DBG_MSG(3, ("UMP memory allocated. ID: %u, size: %lu\n", + new_allocation->secure_id, + new_allocation->size_bytes)); + + return _MALI_OSK_ERR_OK; +} |