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 */ 135