| /* |
| * SPDX-FileCopyrightText: Copyright 2023-2024 Arm Limited and/or its affiliates <open-source-office@arm.com> |
| * SPDX-License-Identifier: GPL-2.0-only |
| * |
| * 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. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, you can access it online at |
| * http://www.gnu.org/licenses/gpl-2.0.html. |
| */ |
| |
| /**************************************************************************** |
| * Includes |
| ****************************************************************************/ |
| |
| #include <common/ethosu_dma_mem.h> |
| |
| #include <linux/err.h> |
| #include <linux/dma-mapping.h> |
| |
| /**************************************************************************** |
| * Functions |
| ****************************************************************************/ |
| |
| struct ethosu_dma_mem *ethosu_dma_mem_alloc(struct device *dev, |
| size_t size) |
| { |
| struct ethosu_dma_mem *dma_mem; |
| |
| if (!size) |
| return ERR_PTR(-EINVAL); |
| |
| dma_mem = devm_kzalloc(dev, sizeof(*dma_mem), GFP_KERNEL); |
| if (!dma_mem) |
| return ERR_PTR(-ENOMEM); |
| |
| dma_mem->dev = dev; |
| dma_mem->size = size; |
| dma_mem->cpu_addr = dma_alloc_coherent(dev, size, &dma_mem->dma_addr, |
| GFP_KERNEL); |
| if (!dma_mem->cpu_addr) { |
| memset(dma_mem, 0, sizeof(*dma_mem)); |
| devm_kfree(dev, dma_mem); |
| |
| return ERR_PTR(-ENOMEM); |
| } |
| |
| return dma_mem; |
| } |
| |
| void ethosu_dma_mem_free(struct ethosu_dma_mem **dma_mem) |
| { |
| struct device *dev; |
| struct ethosu_dma_mem *mem; |
| |
| if (!dma_mem || !*dma_mem) |
| return; |
| |
| mem = *dma_mem; |
| dev = mem->dev; |
| |
| memset(mem->cpu_addr, 0, mem->size); |
| dma_free_coherent(dev, mem->size, mem->cpu_addr, mem->dma_addr); |
| |
| memset(mem, 0, sizeof(*mem)); |
| devm_kfree(dev, mem); |
| |
| *dma_mem = NULL; |
| } |