[3e2b9c9] | 1 | // |
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| 2 | // Cforall Version 1.0.0 Copyright (C) 2020 University of Waterloo |
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| 3 | // |
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| 4 | // The contents of this file are covered under the licence agreement in the |
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| 5 | // file "LICENCE" distributed with Cforall. |
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| 6 | // |
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| 7 | // io/types.hfa -- |
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| 8 | // |
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| 9 | // Author : Thierry Delisle |
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| 10 | // Created On : Fri Jul 31 16:22:47 2020 |
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| 11 | // Last Modified By : |
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| 12 | // Last Modified On : |
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| 13 | // Update Count : |
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| 14 | // |
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| 15 | |
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| 16 | #pragma once |
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| 17 | |
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| 18 | #if defined(CFA_HAVE_LINUX_IO_URING_H) |
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| 19 | #include "bits/locks.hfa" |
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| 20 | |
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| 21 | //----------------------------------------------------------------------- |
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| 22 | // Ring Data structure |
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| 23 | struct __submition_data { |
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| 24 | // Head and tail of the ring (associated with array) |
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| 25 | volatile uint32_t * head; |
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| 26 | volatile uint32_t * tail; |
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| 27 | volatile uint32_t prev_head; |
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| 28 | |
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| 29 | // The actual kernel ring which uses head/tail |
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| 30 | // indexes into the sqes arrays |
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| 31 | uint32_t * array; |
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| 32 | |
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| 33 | // number of entries and mask to go with it |
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| 34 | const uint32_t * num; |
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| 35 | const uint32_t * mask; |
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| 36 | |
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| 37 | // Submission flags (Not sure what for) |
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| 38 | uint32_t * flags; |
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| 39 | |
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| 40 | // number of sqes not submitted (whatever that means) |
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| 41 | uint32_t * dropped; |
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| 42 | |
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| 43 | // Like head/tail but not seen by the kernel |
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| 44 | volatile uint32_t * ready; |
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| 45 | uint32_t ready_cnt; |
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| 46 | |
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| 47 | __spinlock_t lock; |
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| 48 | __spinlock_t release_lock; |
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| 49 | |
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| 50 | // A buffer of sqes (not the actual ring) |
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| 51 | struct io_uring_sqe * sqes; |
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| 52 | |
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| 53 | // The location and size of the mmaped area |
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| 54 | void * ring_ptr; |
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| 55 | size_t ring_sz; |
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| 56 | }; |
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| 57 | |
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| 58 | struct __completion_data { |
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| 59 | // Head and tail of the ring |
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| 60 | volatile uint32_t * head; |
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| 61 | volatile uint32_t * tail; |
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| 62 | |
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| 63 | // number of entries and mask to go with it |
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| 64 | const uint32_t * mask; |
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| 65 | const uint32_t * num; |
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| 66 | |
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| 67 | // number of cqes not submitted (whatever that means) |
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| 68 | uint32_t * overflow; |
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| 69 | |
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| 70 | // the kernel ring |
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| 71 | struct io_uring_cqe * cqes; |
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| 72 | |
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| 73 | // The location and size of the mmaped area |
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| 74 | void * ring_ptr; |
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| 75 | size_t ring_sz; |
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| 76 | }; |
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| 77 | |
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| 78 | struct __io_data { |
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| 79 | struct __submition_data submit_q; |
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| 80 | struct __completion_data completion_q; |
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| 81 | uint32_t ring_flags; |
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| 82 | int fd; |
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| 83 | bool eager_submits:1; |
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| 84 | bool poller_submits:1; |
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| 85 | }; |
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| 86 | |
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| 87 | |
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| 88 | //----------------------------------------------------------------------- |
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| 89 | // IO user data |
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| 90 | struct __io_user_data_t { |
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| 91 | int32_t result; |
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| 92 | $thread * thrd; |
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| 93 | }; |
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| 94 | |
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| 95 | //----------------------------------------------------------------------- |
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| 96 | // Misc |
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| 97 | // Weirdly, some systems that do support io_uring don't actually define these |
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| 98 | #ifdef __alpha__ |
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| 99 | /* |
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| 100 | * alpha is the only exception, all other architectures |
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| 101 | * have common numbers for new system calls. |
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| 102 | */ |
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| 103 | #ifndef __NR_io_uring_setup |
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| 104 | #define __NR_io_uring_setup 535 |
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| 105 | #endif |
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| 106 | #ifndef __NR_io_uring_enter |
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| 107 | #define __NR_io_uring_enter 536 |
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| 108 | #endif |
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| 109 | #ifndef __NR_io_uring_register |
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| 110 | #define __NR_io_uring_register 537 |
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| 111 | #endif |
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| 112 | #else /* !__alpha__ */ |
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| 113 | #ifndef __NR_io_uring_setup |
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| 114 | #define __NR_io_uring_setup 425 |
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| 115 | #endif |
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| 116 | #ifndef __NR_io_uring_enter |
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| 117 | #define __NR_io_uring_enter 426 |
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| 118 | #endif |
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| 119 | #ifndef __NR_io_uring_register |
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| 120 | #define __NR_io_uring_register 427 |
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| 121 | #endif |
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| 122 | #endif |
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| 123 | |
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| 124 | struct epoll_event; |
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| 125 | struct $io_ctx_thread; |
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| 126 | void __ioctx_register($io_ctx_thread & ctx, struct epoll_event & ev); |
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| 127 | void __ioctx_prepare_block($io_ctx_thread & ctx, struct epoll_event & ev); |
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| 128 | #endif |
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