1 /* Copyright 2008 - 2016 Freescale 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 Freescale 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 Freescale 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 Freescale 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;
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28  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29  */
30 
31 #ifndef __DPAA_SYS_H
32 #define __DPAA_SYS_H
33 
34 #include <linux/cpu.h>
35 #include <linux/slab.h>
36 #include <linux/module.h>
37 #include <linux/interrupt.h>
38 #include <linux/kthread.h>
39 #include <linux/sched/signal.h>
40 #include <linux/vmalloc.h>
41 #include <linux/platform_device.h>
42 #include <linux/of.h>
43 #include <linux/of_reserved_mem.h>
44 #include <linux/prefetch.h>
45 #include <linux/genalloc.h>
46 #include <asm/cacheflush.h>
47 #include <linux/io.h>
48 #include <linux/delay.h>
49 
50 /* For 2-element tables related to cache-inhibited and cache-enabled mappings */
51 #define DPAA_PORTAL_CE 0
52 #define DPAA_PORTAL_CI 1
53 
dpaa_flush(void * p)54 static inline void dpaa_flush(void *p)
55 {
56 	/*
57 	 * Only PPC needs to flush the cache currently - on ARM the mapping
58 	 * is non cacheable
59 	 */
60 #ifdef CONFIG_PPC
61 	flush_dcache_range((unsigned long)p, (unsigned long)p+64);
62 #endif
63 }
64 
65 #define dpaa_invalidate(p) dpaa_flush(p)
66 
67 #define dpaa_zero(p) memset(p, 0, 64)
68 
dpaa_touch_ro(void * p)69 static inline void dpaa_touch_ro(void *p)
70 {
71 #if (L1_CACHE_BYTES == 32)
72 	prefetch(p+32);
73 #endif
74 	prefetch(p);
75 }
76 
77 /* Commonly used combo */
dpaa_invalidate_touch_ro(void * p)78 static inline void dpaa_invalidate_touch_ro(void *p)
79 {
80 	dpaa_invalidate(p);
81 	dpaa_touch_ro(p);
82 }
83 
84 
85 #ifdef CONFIG_FSL_DPAA_CHECKING
86 #define DPAA_ASSERT(x) WARN_ON(!(x))
87 #else
88 #define DPAA_ASSERT(x)
89 #endif
90 
91 /* cyclic helper for rings */
dpaa_cyc_diff(u8 ringsize,u8 first,u8 last)92 static inline u8 dpaa_cyc_diff(u8 ringsize, u8 first, u8 last)
93 {
94 	/* 'first' is included, 'last' is excluded */
95 	if (first <= last)
96 		return last - first;
97 	return ringsize + last - first;
98 }
99 
100 /* Offset applied to genalloc pools due to zero being an error return */
101 #define DPAA_GENALLOC_OFF	0x80000000
102 
103 /* Initialize the devices private memory region */
104 int qbman_init_private_mem(struct device *dev, int idx, dma_addr_t *addr,
105 				size_t *size);
106 
107 /* memremap() attributes for different platforms */
108 #ifdef CONFIG_PPC
109 #define QBMAN_MEMREMAP_ATTR	MEMREMAP_WB
110 #else
111 #define QBMAN_MEMREMAP_ATTR	MEMREMAP_WC
112 #endif
113 
dpaa_set_portal_irq_affinity(struct device * dev,int irq,int cpu)114 static inline int dpaa_set_portal_irq_affinity(struct device *dev,
115 					       int irq, int cpu)
116 {
117 	int ret = 0;
118 
119 	if (!irq_can_set_affinity(irq)) {
120 		dev_err(dev, "unable to set IRQ affinity\n");
121 		return -EINVAL;
122 	}
123 
124 	if (cpu == -1 || !cpu_online(cpu))
125 		cpu = cpumask_any(cpu_online_mask);
126 
127 	ret = irq_set_affinity(irq, cpumask_of(cpu));
128 	if (ret)
129 		dev_err(dev, "irq_set_affinity() on CPU %d failed\n", cpu);
130 
131 	return ret;
132 }
133 
134 #endif	/* __DPAA_SYS_H */
135