drivers/soc/fsl/qbman/dpaa_sys.h

   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;
  25  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  26  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  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
  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
  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 */
  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 */
  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
 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 */