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1// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-or-later
2/*
3 * Copyright 2008 - 2015 Freescale Semiconductor Inc.
4 */
5
6#include "fman_muram.h"
7
8#include <linux/io.h>
9#include <linux/slab.h>
10#include <linux/genalloc.h>
11
12struct muram_info {
13 struct gen_pool *pool;
14 void __iomem *vbase;
15 size_t size;
16 phys_addr_t pbase;
17};
18
19static unsigned long fman_muram_vbase_to_offset(struct muram_info *muram,
20 unsigned long vaddr)
21{
22 return vaddr - (unsigned long)muram->vbase;
23}
24
25/**
26 * fman_muram_init
27 * @base: Pointer to base of memory mapped FM-MURAM.
28 * @size: Size of the FM-MURAM partition.
29 *
30 * Creates partition in the MURAM.
31 * The routine returns a pointer to the MURAM partition.
32 * This pointer must be passed as to all other FM-MURAM function calls.
33 * No actual initialization or configuration of FM_MURAM hardware is done by
34 * this routine.
35 *
36 * Return: pointer to FM-MURAM object, or NULL for Failure.
37 */
38struct muram_info *fman_muram_init(phys_addr_t base, size_t size)
39{
40 struct muram_info *muram;
41 void __iomem *vaddr;
42 int ret;
43
44 muram = kzalloc(sizeof(*muram), GFP_KERNEL);
45 if (!muram)
46 return NULL;
47
48 muram->pool = gen_pool_create(ilog2(64), -1);
49 if (!muram->pool) {
50 pr_err("%s(): MURAM pool create failed\n", __func__);
51 goto muram_free;
52 }
53
54 vaddr = ioremap(base, size);
55 if (!vaddr) {
56 pr_err("%s(): MURAM ioremap failed\n", __func__);
57 goto pool_destroy;
58 }
59
60 ret = gen_pool_add_virt(muram->pool, (unsigned long)vaddr,
61 base, size, -1);
62 if (ret < 0) {
63 pr_err("%s(): MURAM pool add failed\n", __func__);
64 iounmap(vaddr);
65 goto pool_destroy;
66 }
67
68 memset_io(vaddr, 0, (int)size);
69
70 muram->vbase = vaddr;
71 muram->pbase = base;
72 return muram;
73
74pool_destroy:
75 gen_pool_destroy(muram->pool);
76muram_free:
77 kfree(muram);
78 return NULL;
79}
80
81/**
82 * fman_muram_offset_to_vbase
83 * @muram: FM-MURAM module pointer.
84 * @offset: the offset of the memory block
85 *
86 * Gives the address of the memory region from specific offset
87 *
88 * Return: The address of the memory block
89 */
90unsigned long fman_muram_offset_to_vbase(struct muram_info *muram,
91 unsigned long offset)
92{
93 return offset + (unsigned long)muram->vbase;
94}
95
96/**
97 * fman_muram_alloc
98 * @muram: FM-MURAM module pointer.
99 * @size: Size of the memory to be allocated.
100 *
101 * Allocate some memory from FM-MURAM partition.
102 *
103 * Return: address of the allocated memory; NULL otherwise.
104 */
105unsigned long fman_muram_alloc(struct muram_info *muram, size_t size)
106{
107 unsigned long vaddr;
108
109 vaddr = gen_pool_alloc(muram->pool, size);
110 if (!vaddr)
111 return -ENOMEM;
112
113 memset_io((void __iomem *)vaddr, 0, size);
114
115 return fman_muram_vbase_to_offset(muram, vaddr);
116}
117
118/**
119 * fman_muram_free_mem
120 * @muram: FM-MURAM module pointer.
121 * @offset: offset of the memory region to be freed.
122 * @size: size of the memory to be freed.
123 *
124 * Free an allocated memory from FM-MURAM partition.
125 */
126void fman_muram_free_mem(struct muram_info *muram, unsigned long offset,
127 size_t size)
128{
129 unsigned long addr = fman_muram_offset_to_vbase(muram, offset);
130
131 gen_pool_free(muram->pool, addr, size);
132}
1// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-or-later
2/*
3 * Copyright 2008 - 2015 Freescale Semiconductor Inc.
4 */
5
6#include "fman_muram.h"
7
8#include <linux/io.h>
9#include <linux/slab.h>
10#include <linux/genalloc.h>
11
12struct muram_info {
13 struct gen_pool *pool;
14 void __iomem *vbase;
15 phys_addr_t pbase;
16};
17
18static unsigned long fman_muram_vbase_to_offset(struct muram_info *muram,
19 unsigned long vaddr)
20{
21 return vaddr - (unsigned long)muram->vbase;
22}
23
24/**
25 * fman_muram_init
26 * @base: Pointer to base of memory mapped FM-MURAM.
27 * @size: Size of the FM-MURAM partition.
28 *
29 * Creates partition in the MURAM.
30 * The routine returns a pointer to the MURAM partition.
31 * This pointer must be passed as to all other FM-MURAM function calls.
32 * No actual initialization or configuration of FM_MURAM hardware is done by
33 * this routine.
34 *
35 * Return: pointer to FM-MURAM object, or NULL for Failure.
36 */
37struct muram_info *fman_muram_init(phys_addr_t base, size_t size)
38{
39 struct muram_info *muram;
40 void __iomem *vaddr;
41 int ret;
42
43 muram = kzalloc(sizeof(*muram), GFP_KERNEL);
44 if (!muram)
45 return NULL;
46
47 muram->pool = gen_pool_create(ilog2(64), -1);
48 if (!muram->pool) {
49 pr_err("%s(): MURAM pool create failed\n", __func__);
50 goto muram_free;
51 }
52
53 vaddr = ioremap(base, size);
54 if (!vaddr) {
55 pr_err("%s(): MURAM ioremap failed\n", __func__);
56 goto pool_destroy;
57 }
58
59 ret = gen_pool_add_virt(muram->pool, (unsigned long)vaddr,
60 base, size, -1);
61 if (ret < 0) {
62 pr_err("%s(): MURAM pool add failed\n", __func__);
63 iounmap(vaddr);
64 goto pool_destroy;
65 }
66
67 memset_io(vaddr, 0, (int)size);
68
69 muram->vbase = vaddr;
70 muram->pbase = base;
71 return muram;
72
73pool_destroy:
74 gen_pool_destroy(muram->pool);
75muram_free:
76 kfree(muram);
77 return NULL;
78}
79
80/**
81 * fman_muram_offset_to_vbase
82 * @muram: FM-MURAM module pointer.
83 * @offset: the offset of the memory block
84 *
85 * Gives the address of the memory region from specific offset
86 *
87 * Return: The address of the memory block
88 */
89unsigned long fman_muram_offset_to_vbase(struct muram_info *muram,
90 unsigned long offset)
91{
92 return offset + (unsigned long)muram->vbase;
93}
94
95/**
96 * fman_muram_alloc
97 * @muram: FM-MURAM module pointer.
98 * @size: Size of the memory to be allocated.
99 *
100 * Allocate some memory from FM-MURAM partition.
101 *
102 * Return: address of the allocated memory; NULL otherwise.
103 */
104unsigned long fman_muram_alloc(struct muram_info *muram, size_t size)
105{
106 unsigned long vaddr;
107
108 vaddr = gen_pool_alloc(muram->pool, size);
109 if (!vaddr)
110 return -ENOMEM;
111
112 memset_io((void __iomem *)vaddr, 0, size);
113
114 return fman_muram_vbase_to_offset(muram, vaddr);
115}
116
117/**
118 * fman_muram_free_mem
119 * @muram: FM-MURAM module pointer.
120 * @offset: offset of the memory region to be freed.
121 * @size: size of the memory to be freed.
122 *
123 * Free an allocated memory from FM-MURAM partition.
124 */
125void fman_muram_free_mem(struct muram_info *muram, unsigned long offset,
126 size_t size)
127{
128 unsigned long addr = fman_muram_offset_to_vbase(muram, offset);
129
130 gen_pool_free(muram->pool, addr, size);
131}