1*4882a593Smuzhiyun /* Copyright 2017 NXP Semiconductor, Inc.
2*4882a593Smuzhiyun *
3*4882a593Smuzhiyun * Redistribution and use in source and binary forms, with or without
4*4882a593Smuzhiyun * modification, are permitted provided that the following conditions are met:
5*4882a593Smuzhiyun * * Redistributions of source code must retain the above copyright
6*4882a593Smuzhiyun * notice, this list of conditions and the following disclaimer.
7*4882a593Smuzhiyun * * Redistributions in binary form must reproduce the above copyright
8*4882a593Smuzhiyun * notice, this list of conditions and the following disclaimer in the
9*4882a593Smuzhiyun * documentation and/or other materials provided with the distribution.
10*4882a593Smuzhiyun * * Neither the name of NXP Semiconductor nor the
11*4882a593Smuzhiyun * names of its contributors may be used to endorse or promote products
12*4882a593Smuzhiyun * derived from this software without specific prior written permission.
13*4882a593Smuzhiyun *
14*4882a593Smuzhiyun * ALTERNATIVELY, this software may be distributed under the terms of the
15*4882a593Smuzhiyun * GNU General Public License ("GPL") as published by the Free Software
16*4882a593Smuzhiyun * Foundation, either version 2 of that License or (at your option) any
17*4882a593Smuzhiyun * later version.
18*4882a593Smuzhiyun *
19*4882a593Smuzhiyun * THIS SOFTWARE IS PROVIDED BY NXP Semiconductor ``AS IS'' AND ANY
20*4882a593Smuzhiyun * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
21*4882a593Smuzhiyun * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
22*4882a593Smuzhiyun * DISCLAIMED. IN NO EVENT SHALL NXP Semiconductor BE LIABLE FOR ANY
23*4882a593Smuzhiyun * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
24*4882a593Smuzhiyun * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
25*4882a593Smuzhiyun * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
26*4882a593Smuzhiyun * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27*4882a593Smuzhiyun * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
28*4882a593Smuzhiyun * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29*4882a593Smuzhiyun */
30*4882a593Smuzhiyun
31*4882a593Smuzhiyun #include <linux/dma-mapping.h>
32*4882a593Smuzhiyun #include "dpaa_sys.h"
33*4882a593Smuzhiyun
34*4882a593Smuzhiyun /*
35*4882a593Smuzhiyun * Initialize a devices private memory region
36*4882a593Smuzhiyun */
qbman_init_private_mem(struct device * dev,int idx,dma_addr_t * addr,size_t * size)37*4882a593Smuzhiyun int qbman_init_private_mem(struct device *dev, int idx, dma_addr_t *addr,
38*4882a593Smuzhiyun size_t *size)
39*4882a593Smuzhiyun {
40*4882a593Smuzhiyun struct device_node *mem_node;
41*4882a593Smuzhiyun struct reserved_mem *rmem;
42*4882a593Smuzhiyun struct property *prop;
43*4882a593Smuzhiyun int len, err;
44*4882a593Smuzhiyun __be32 *res_array;
45*4882a593Smuzhiyun
46*4882a593Smuzhiyun mem_node = of_parse_phandle(dev->of_node, "memory-region", idx);
47*4882a593Smuzhiyun if (!mem_node) {
48*4882a593Smuzhiyun dev_err(dev, "No memory-region found for index %d\n", idx);
49*4882a593Smuzhiyun return -ENODEV;
50*4882a593Smuzhiyun }
51*4882a593Smuzhiyun
52*4882a593Smuzhiyun rmem = of_reserved_mem_lookup(mem_node);
53*4882a593Smuzhiyun if (!rmem) {
54*4882a593Smuzhiyun dev_err(dev, "of_reserved_mem_lookup() returned NULL\n");
55*4882a593Smuzhiyun return -ENODEV;
56*4882a593Smuzhiyun }
57*4882a593Smuzhiyun *addr = rmem->base;
58*4882a593Smuzhiyun *size = rmem->size;
59*4882a593Smuzhiyun
60*4882a593Smuzhiyun /*
61*4882a593Smuzhiyun * Check if the reg property exists - if not insert the node
62*4882a593Smuzhiyun * so upon kexec() the same memory region address will be preserved.
63*4882a593Smuzhiyun * This is needed because QBMan HW does not allow the base address/
64*4882a593Smuzhiyun * size to be modified once set.
65*4882a593Smuzhiyun */
66*4882a593Smuzhiyun prop = of_find_property(mem_node, "reg", &len);
67*4882a593Smuzhiyun if (!prop) {
68*4882a593Smuzhiyun prop = devm_kzalloc(dev, sizeof(*prop), GFP_KERNEL);
69*4882a593Smuzhiyun if (!prop)
70*4882a593Smuzhiyun return -ENOMEM;
71*4882a593Smuzhiyun prop->value = res_array = devm_kzalloc(dev, sizeof(__be32) * 4,
72*4882a593Smuzhiyun GFP_KERNEL);
73*4882a593Smuzhiyun if (!prop->value)
74*4882a593Smuzhiyun return -ENOMEM;
75*4882a593Smuzhiyun res_array[0] = cpu_to_be32(upper_32_bits(*addr));
76*4882a593Smuzhiyun res_array[1] = cpu_to_be32(lower_32_bits(*addr));
77*4882a593Smuzhiyun res_array[2] = cpu_to_be32(upper_32_bits(*size));
78*4882a593Smuzhiyun res_array[3] = cpu_to_be32(lower_32_bits(*size));
79*4882a593Smuzhiyun prop->length = sizeof(__be32) * 4;
80*4882a593Smuzhiyun prop->name = devm_kstrdup(dev, "reg", GFP_KERNEL);
81*4882a593Smuzhiyun if (!prop->name)
82*4882a593Smuzhiyun return -ENOMEM;
83*4882a593Smuzhiyun err = of_add_property(mem_node, prop);
84*4882a593Smuzhiyun if (err)
85*4882a593Smuzhiyun return err;
86*4882a593Smuzhiyun }
87*4882a593Smuzhiyun
88*4882a593Smuzhiyun return 0;
89*4882a593Smuzhiyun }
90