| /* Copyright 2017 NXP Semiconductor, Inc. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are met: |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * * Neither the name of NXP Semiconductor nor the |
| * names of its contributors may be used to endorse or promote products |
| * derived from this software without specific prior written permission. |
| * |
| * ALTERNATIVELY, this software may be distributed under the terms of the |
| * GNU General Public License ("GPL") as published by the Free Software |
| * Foundation, either version 2 of that License or (at your option) any |
| * later version. |
| * |
| * THIS SOFTWARE IS PROVIDED BY NXP Semiconductor ``AS IS'' AND ANY |
| * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
| * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| * DISCLAIMED. IN NO EVENT SHALL NXP Semiconductor BE LIABLE FOR ANY |
| * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
| * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include <linux/dma-mapping.h> |
| #include "dpaa_sys.h" |
| |
| /* |
| * Initialize a devices private memory region |
| */ |
| int qbman_init_private_mem(struct device *dev, int idx, dma_addr_t *addr, |
| size_t *size) |
| { |
| int ret; |
| struct device_node *mem_node; |
| u64 size64; |
| |
| ret = of_reserved_mem_device_init_by_idx(dev, dev->of_node, idx); |
| if (ret) { |
| dev_err(dev, |
| "of_reserved_mem_device_init_by_idx(%d) failed 0x%x\n", |
| idx, ret); |
| return -ENODEV; |
| } |
| mem_node = of_parse_phandle(dev->of_node, "memory-region", 0); |
| if (mem_node) { |
| ret = of_property_read_u64(mem_node, "size", &size64); |
| if (ret) { |
| dev_err(dev, "of_address_to_resource fails 0x%x\n", |
| ret); |
| return -ENODEV; |
| } |
| *size = size64; |
| } else { |
| dev_err(dev, "No memory-region found for index %d\n", idx); |
| return -ENODEV; |
| } |
| |
| if (!dma_alloc_coherent(dev, *size, addr, 0)) { |
| dev_err(dev, "DMA Alloc memory failed\n"); |
| return -ENODEV; |
| } |
| |
| /* |
| * Disassociate the reserved memory area from the device |
| * because a device can only have one DMA memory area. This |
| * should be fine since the memory is allocated and initialized |
| * and only ever accessed by the QBMan device from now on |
| */ |
| of_reserved_mem_device_release(dev); |
| return 0; |
| } |
