net/bnxt: update TruFlow core index table
[dpdk.git] / drivers / net / octeontx / base / octeontx_io.h
1 /* SPDX-License-Identifier: BSD-3-Clause
2  * Copyright(c) 2017 Cavium, Inc
3  */
4
5 #ifndef __OCTEONTX_IO_H__
6 #define __OCTEONTX_IO_H__
7
8 #include <stddef.h>
9 #include <stdint.h>
10
11 #include <rte_io.h>
12
13 /* In Cavium OCTEON TX SoC, all accesses to the device registers are
14  * implicitly strongly ordered. So, The relaxed version of IO operation is
15  * safe to use with out any IO memory barriers.
16  */
17 #define octeontx_read64 rte_read64_relaxed
18 #define octeontx_write64 rte_write64_relaxed
19
20 /* ARM64 specific functions */
21 #if defined(RTE_ARCH_ARM64)
22 #define octeontx_prefetch_store_keep(_ptr) ({\
23         asm volatile("prfm pstl1keep, %a0\n" : : "p" (_ptr)); })
24
25 #define octeontx_load_pair(val0, val1, addr) ({         \
26                         asm volatile(                   \
27                         "ldp %x[x0], %x[x1], [%x[p1]]"  \
28                         :[x0]"=r"(val0), [x1]"=r"(val1) \
29                         :[p1]"r"(addr)                  \
30                         ); })
31
32 #define octeontx_store_pair(val0, val1, addr) ({                \
33                         asm volatile(                   \
34                         "stp %x[x0], %x[x1], [%x[p1]]"  \
35                         ::[x0]"r"(val0), [x1]"r"(val1), [p1]"r"(addr) \
36                         ); })
37 #else /* Un optimized functions for building on non arm64 arch */
38
39 #define octeontx_prefetch_store_keep(_ptr) do {} while (0)
40
41 #define octeontx_load_pair(val0, val1, addr)            \
42 do {                                                    \
43         val0 = rte_read64(addr);                        \
44         val1 = rte_read64(((uint8_t *)addr) + 8);       \
45 } while (0)
46
47 #define octeontx_store_pair(val0, val1, addr)           \
48 do {                                                    \
49         rte_write64(val0, addr);                        \
50         rte_write64(val1, (((uint8_t *)addr) + 8));     \
51 } while (0)
52 #endif
53
54 #if defined(RTE_ARCH_ARM64)
55 #if defined(__ARM_FEATURE_SVE)
56 #define __LSE_PREAMBLE " .cpu   generic+lse+sve\n"
57 #else
58 #define __LSE_PREAMBLE " .cpu   generic+lse\n"
59 #endif
60 /**
61  * Perform an atomic fetch-and-add operation.
62  */
63 static inline uint64_t
64 octeontx_reg_ldadd_u64(void *addr, int64_t off)
65 {
66         uint64_t old_val;
67
68         __asm__ volatile(
69                 __LSE_PREAMBLE
70                 " ldadd %1, %0, [%2]\n"
71                 : "=r" (old_val) : "r" (off), "r" (addr) : "memory");
72
73         return old_val;
74 }
75
76 /**
77  * Perform a LMTST operation - an atomic write of up to 128 byte to
78  * an I/O block that supports this operation type.
79  *
80  * @param lmtline_va is the address where LMTLINE is mapped
81  * @param ioreg_va is the virtual address of the device register
82  * @param cmdbuf is the array of peripheral commands to execute
83  * @param cmdsize is the number of 64-bit words in 'cmdbuf'
84  *
85  * @return N/A
86  */
87 static inline void
88 octeontx_reg_lmtst(void *lmtline_va, void *ioreg_va, const uint64_t cmdbuf[],
89                    uint64_t cmdsize)
90 {
91         uint64_t result;
92         uint64_t word_count;
93         uint64_t *lmtline = lmtline_va;
94
95         word_count = cmdsize;
96
97         do {
98                 /* Copy commands to LMTLINE */
99                 for (result = 0; result < word_count; result += 2) {
100                         lmtline[result + 0] = cmdbuf[result + 0];
101                         lmtline[result + 1] = cmdbuf[result + 1];
102                 }
103
104                 /* LDEOR initiates atomic transfer to I/O device */
105                 __asm__ volatile(
106                         __LSE_PREAMBLE
107                         " ldeor xzr, %0, [%1]\n"
108                         : "=r" (result) : "r" (ioreg_va) : "memory");
109         } while (!result);
110 }
111
112 #undef __LSE_PREAMBLE
113 #else
114
115 static inline uint64_t
116 octeontx_reg_ldadd_u64(void *addr, int64_t off)
117 {
118         RTE_SET_USED(addr);
119         RTE_SET_USED(off);
120         return 0;
121 }
122
123 static inline void
124 octeontx_reg_lmtst(void *lmtline_va, void *ioreg_va, const uint64_t cmdbuf[],
125                    uint64_t cmdsize)
126 {
127         RTE_SET_USED(lmtline_va);
128         RTE_SET_USED(ioreg_va);
129         RTE_SET_USED(cmdbuf);
130         RTE_SET_USED(cmdsize);
131 }
132
133 #endif
134 #endif /* __OCTEONTX_IO_H__ */