1/* Licensed under the OpenIB.org BSD license (FreeBSD Variant) - See COPYING.md 2 */ 3#ifndef MMIO_H 4#define MMIO_H 5 6#include <unistd.h> 7#include <sys/syscall.h> 8#ifdef __s390x__ 9 10static inline long mmio_writeb(const unsigned long mmio_addr, 11 const uint8_t val) 12{ 13 return syscall(__NR_s390_pci_mmio_write, mmio_addr, &val, sizeof(val)); 14} 15 16static inline long mmio_writew(const unsigned long mmio_addr, 17 const uint16_t val) 18{ 19 return syscall(__NR_s390_pci_mmio_write, mmio_addr, &val, sizeof(val)); 20} 21 22static inline long mmio_writel(const unsigned long mmio_addr, 23 const uint32_t val) 24{ 25 return syscall(__NR_s390_pci_mmio_write, mmio_addr, &val, sizeof(val)); 26} 27 28static inline long mmio_writeq(const unsigned long mmio_addr, 29 const uint64_t val) 30{ 31 return syscall(__NR_s390_pci_mmio_write, mmio_addr, &val, sizeof(val)); 32} 33 34static inline long mmio_write(const unsigned long mmio_addr, 35 const void *val, 36 const size_t length) 37{ 38 return syscall(__NR_s390_pci_mmio_write, mmio_addr, val, length); 39} 40 41static inline long mmio_readb(const unsigned long mmio_addr, uint8_t *val) 42{ 43 return syscall(__NR_s390_pci_mmio_read, mmio_addr, val, sizeof(*val)); 44} 45 46static inline long mmio_readw(const unsigned long mmio_addr, uint16_t *val) 47{ 48 return syscall(__NR_s390_pci_mmio_read, mmio_addr, val, sizeof(*val)); 49} 50 51static inline long mmio_readl(const unsigned long mmio_addr, uint32_t *val) 52{ 53 return syscall(__NR_s390_pci_mmio_read, mmio_addr, val, sizeof(*val)); 54} 55 56static inline long mmio_readq(const unsigned long mmio_addr, uint64_t *val) 57{ 58 return syscall(__NR_s390_pci_mmio_read, mmio_addr, val, sizeof(*val)); 59} 60 61static inline long mmio_read(const unsigned long mmio_addr, 62 void *val, 63 const size_t length) 64{ 65 return syscall(__NR_s390_pci_mmio_read, mmio_addr, val, length); 66} 67 68static inline void mlx4_bf_copy(unsigned long *dst, 69 unsigned long *src, 70 unsigned bytecnt) 71{ 72 mmio_write((unsigned long)dst, src, bytecnt); 73} 74 75#else 76 77#define mmio_writeb(addr, value) \ 78 (*((volatile uint8_t *)addr) = value) 79#define mmio_writew(addr, value) \ 80 (*((volatile uint16_t *)addr) = value) 81#define mmio_writel(addr, value) \ 82 (*((volatile uint32_t *)addr) = value) 83#define mmio_writeq(addr, value) \ 84 (*((volatile uint64_t *)addr) = value) 85#define mmio_write(addr, value, length) \ 86 memcpy(addr, value, length) 87 88#define mmio_readb(addr, value) \ 89 (value = *((volatile uint8_t *)addr)) 90#define mmio_readw(addr, value) \ 91 (value = *((volatile uint16_t *)addr)) 92#define mmio_readl(addr, value) \ 93 (value = *((volatile uint32_t *)addr)) 94#define mmio_readq(addr, value) \ 95 (value = *((volatile uint64_t *)addr)) 96#define mmio_read(addr, value, length) \ 97 memcpy(value, addr, length) 98 99/* 100 * Avoid using memcpy() to copy to BlueFlame page, since memcpy() 101 * implementations may use move-string-buffer assembler instructions, 102 * which do not guarantee order of copying. 103 */ 104static inline void mlx4_bf_copy(unsigned long *dst, 105 unsigned long *src, 106 unsigned bytecnt) 107{ 108 while (bytecnt > 0) { 109 *dst++ = *src++; 110 *dst++ = *src++; 111 bytecnt -= 2 * sizeof(long); 112 } 113} 114#endif 115 116#endif 117