1 /* Copyright 2017 NXP Semiconductor, Inc.
3 * Redistribution and use in source and binary forms, with or without
4 * modification, are permitted provided that the following conditions are met:
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9 * documentation and/or other materials provided with the distribution.
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11 * names of its contributors may be used to endorse or promote products
12 * derived from this software without specific prior written permission.
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
19 * THIS SOFTWARE IS PROVIDED BY NXP Semiconductor ``AS IS'' AND ANY
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21 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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31 #include <linux/dma-mapping.h>
35 * Initialize a devices private memory region
37 int qbman_init_private_mem(struct device *dev, int idx, dma_addr_t *addr,
40 struct device_node *mem_node;
41 struct reserved_mem *rmem;
42 struct property *prop;
46 mem_node = of_parse_phandle(dev->of_node, "memory-region", idx);
48 dev_err(dev, "No memory-region found for index %d\n", idx);
52 rmem = of_reserved_mem_lookup(mem_node);
54 dev_err(dev, "of_reserved_mem_lookup() returned NULL\n");
61 * Check if the reg property exists - if not insert the node
62 * so upon kexec() the same memory region address will be preserved.
63 * This is needed because QBMan HW does not allow the base address/
64 * size to be modified once set.
66 prop = of_find_property(mem_node, "reg", &len);
68 prop = devm_kzalloc(dev, sizeof(*prop), GFP_KERNEL);
71 prop->value = res_array = devm_kzalloc(dev, sizeof(__be32) * 4,
75 res_array[0] = cpu_to_be32(upper_32_bits(*addr));
76 res_array[1] = cpu_to_be32(lower_32_bits(*addr));
77 res_array[2] = cpu_to_be32(upper_32_bits(*size));
78 res_array[3] = cpu_to_be32(lower_32_bits(*size));
79 prop->length = sizeof(__be32) * 4;
80 prop->name = devm_kstrdup(dev, "reg", GFP_KERNEL);
83 err = of_add_property(mem_node, prop);