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1/* Copyright 2017 NXP Semiconductor, Inc.2 *3 * Redistribution and use in source and binary forms, with or without4 * modification, are permitted provided that the following conditions are met:5 * * Redistributions of source code must retain the above copyright6 * notice, this list of conditions and the following disclaimer.7 * * Redistributions in binary form must reproduce the above copyright8 * notice, this list of conditions and the following disclaimer in the9 * documentation and/or other materials provided with the distribution.10 * * Neither the name of NXP Semiconductor nor the11 * names of its contributors may be used to endorse or promote products12 * derived from this software without specific prior written permission.13 *14 * ALTERNATIVELY, this software may be distributed under the terms of the15 * GNU General Public License ("GPL") as published by the Free Software16 * Foundation, either version 2 of that License or (at your option) any17 * later version.18 *19 * THIS SOFTWARE IS PROVIDED BY NXP Semiconductor ``AS IS'' AND ANY20 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED21 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE22 * DISCLAIMED. IN NO EVENT SHALL NXP Semiconductor BE LIABLE FOR ANY23 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES24 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;25 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND26 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS28 * 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 region36 */37int qbman_init_private_mem(struct device *dev, int idx, const char *compat,38 dma_addr_t *addr, size_t *size)39{40 struct device_node *mem_node;41 struct reserved_mem *rmem;42 int err;43 __be32 *res_array;44 45 mem_node = of_parse_phandle(dev->of_node, "memory-region", idx);46 if (!mem_node) {47 mem_node = of_find_compatible_node(NULL, NULL, compat);48 if (!mem_node) {49 dev_err(dev, "No memory-region found for index %d or compatible '%s'\n",50 idx, compat);51 return -ENODEV;52 }53 }54 55 rmem = of_reserved_mem_lookup(mem_node);56 if (!rmem) {57 dev_err(dev, "of_reserved_mem_lookup() returned NULL\n");58 return -ENODEV;59 }60 *addr = rmem->base;61 *size = rmem->size;62 63 /*64 * Check if the reg property exists - if not insert the node65 * so upon kexec() the same memory region address will be preserved.66 * This is needed because QBMan HW does not allow the base address/67 * size to be modified once set.68 */69 if (!of_property_present(mem_node, "reg")) {70 struct property *prop;71 72 prop = devm_kzalloc(dev, sizeof(*prop), GFP_KERNEL);73 if (!prop)74 return -ENOMEM;75 prop->value = res_array = devm_kzalloc(dev, sizeof(__be32) * 4,76 GFP_KERNEL);77 if (!prop->value)78 return -ENOMEM;79 res_array[0] = cpu_to_be32(upper_32_bits(*addr));80 res_array[1] = cpu_to_be32(lower_32_bits(*addr));81 res_array[2] = cpu_to_be32(upper_32_bits(*size));82 res_array[3] = cpu_to_be32(lower_32_bits(*size));83 prop->length = sizeof(__be32) * 4;84 prop->name = devm_kstrdup(dev, "reg", GFP_KERNEL);85 if (!prop->name)86 return -ENOMEM;87 err = of_add_property(mem_node, prop);88 if (err)89 return err;90 }91 92 return 0;93}94