1 /* Copyright 2017 NXP Semiconductor, Inc. 2 * 3 * Redistribution and use in source and binary forms, with or without 4 * modification, are permitted provided that the following conditions are met: 5 * * Redistributions of source code must retain the above copyright 6 * notice, this list of conditions and the following disclaimer. 7 * * Redistributions in binary form must reproduce the above copyright 8 * notice, this list of conditions and the following disclaimer in the 9 * documentation and/or other materials provided with the distribution. 10 * * Neither the name of NXP Semiconductor nor the 11 * names of its contributors may be used to endorse or promote products 12 * derived from this software without specific prior written permission. 13 * 14 * ALTERNATIVELY, this software may be distributed under the terms of the 15 * GNU General Public License ("GPL") as published by the Free Software 16 * Foundation, either version 2 of that License or (at your option) any 17 * later version. 18 * 19 * THIS SOFTWARE IS PROVIDED BY NXP Semiconductor ``AS IS'' AND ANY 20 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 21 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 22 * DISCLAIMED. IN NO EVENT SHALL NXP Semiconductor BE LIABLE FOR ANY 23 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 24 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 25 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 26 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 28 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #include <linux/dma-mapping.h> 32 #include "dpaa_sys.h" 33 34 /* 35 * Initialize a devices private memory region 36 */ 37 int qbman_init_private_mem(struct device *dev, int idx, dma_addr_t *addr, 38 size_t *size) 39 { 40 int ret; 41 struct device_node *mem_node; 42 u64 size64; 43 44 ret = of_reserved_mem_device_init_by_idx(dev, dev->of_node, idx); 45 if (ret) { 46 dev_err(dev, 47 "of_reserved_mem_device_init_by_idx(%d) failed 0x%x\n", 48 idx, ret); 49 return -ENODEV; 50 } 51 mem_node = of_parse_phandle(dev->of_node, "memory-region", 0); 52 if (mem_node) { 53 ret = of_property_read_u64(mem_node, "size", &size64); 54 if (ret) { 55 dev_err(dev, "of_address_to_resource fails 0x%x\n", 56 ret); 57 return -ENODEV; 58 } 59 *size = size64; 60 } else { 61 dev_err(dev, "No memory-region found for index %d\n", idx); 62 return -ENODEV; 63 } 64 65 if (!dma_alloc_coherent(dev, *size, addr, 0)) { 66 dev_err(dev, "DMA Alloc memory failed\n"); 67 return -ENODEV; 68 } 69 70 /* 71 * Disassociate the reserved memory area from the device 72 * because a device can only have one DMA memory area. This 73 * should be fine since the memory is allocated and initialized 74 * and only ever accessed by the QBMan device from now on 75 */ 76 of_reserved_mem_device_release(dev); 77 return 0; 78 } 79