1 /*- 2 * BSD LICENSE 3 * 4 * Copyright (c) Intel Corporation. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 11 * * Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * * Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in 15 * the documentation and/or other materials provided with the 16 * distribution. 17 * * Neither the name of Intel Corporation nor the names of its 18 * contributors may be used to endorse or promote products derived 19 * from this software without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 22 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 24 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 25 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 26 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 27 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 31 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34 #define DEV_BUFFER_SIZE (64 * 1024 * 1024) 35 #define DEV_BUFFER_BLOCKLEN (4096) 36 #define DEV_BUFFER_BLOCKCNT (DEV_BUFFER_SIZE / DEV_BUFFER_BLOCKLEN) 37 uint8_t *g_dev_buffer; 38 39 /* Define here for UT only. */ 40 struct spdk_io_channel g_io_channel; 41 42 static struct spdk_io_channel * 43 dev_create_channel(struct spdk_bs_dev *dev) 44 { 45 return &g_io_channel; 46 } 47 48 static void 49 dev_destroy_channel(struct spdk_bs_dev *dev, struct spdk_io_channel *channel) 50 { 51 } 52 53 static void 54 dev_destroy(struct spdk_bs_dev *dev) 55 { 56 free(dev); 57 } 58 59 static void 60 dev_read(struct spdk_bs_dev *dev, struct spdk_io_channel *channel, void *payload, 61 uint64_t lba, uint32_t lba_count, 62 struct spdk_bs_dev_cb_args *cb_args) 63 { 64 uint64_t offset, length; 65 66 offset = lba * DEV_BUFFER_BLOCKLEN; 67 length = lba_count * DEV_BUFFER_BLOCKLEN; 68 SPDK_CU_ASSERT_FATAL(offset + length <= DEV_BUFFER_SIZE); 69 memcpy(payload, &g_dev_buffer[offset], length); 70 cb_args->cb_fn(cb_args->channel, cb_args->cb_arg, 0); 71 } 72 73 static void 74 dev_write(struct spdk_bs_dev *dev, struct spdk_io_channel *channel, void *payload, 75 uint64_t lba, uint32_t lba_count, 76 struct spdk_bs_dev_cb_args *cb_args) 77 { 78 uint64_t offset, length; 79 80 offset = lba * DEV_BUFFER_BLOCKLEN; 81 length = lba_count * DEV_BUFFER_BLOCKLEN; 82 SPDK_CU_ASSERT_FATAL(offset + length <= DEV_BUFFER_SIZE); 83 memcpy(&g_dev_buffer[offset], payload, length); 84 cb_args->cb_fn(cb_args->channel, cb_args->cb_arg, 0); 85 } 86 87 static void 88 __check_iov(struct iovec *iov, int iovcnt, uint64_t length) 89 { 90 int i; 91 92 for (i = 0; i < iovcnt; i++) { 93 length -= iov[i].iov_len; 94 } 95 96 CU_ASSERT(length == 0); 97 } 98 99 static void 100 dev_readv(struct spdk_bs_dev *dev, struct spdk_io_channel *channel, 101 struct iovec *iov, int iovcnt, 102 uint64_t lba, uint32_t lba_count, 103 struct spdk_bs_dev_cb_args *cb_args) 104 { 105 uint64_t offset, length; 106 int i; 107 108 offset = lba * DEV_BUFFER_BLOCKLEN; 109 length = lba_count * DEV_BUFFER_BLOCKLEN; 110 SPDK_CU_ASSERT_FATAL(offset + length <= DEV_BUFFER_SIZE); 111 __check_iov(iov, iovcnt, length); 112 113 for (i = 0; i < iovcnt; i++) { 114 memcpy(iov[i].iov_base, &g_dev_buffer[offset], iov[i].iov_len); 115 offset += iov[i].iov_len; 116 } 117 118 cb_args->cb_fn(cb_args->channel, cb_args->cb_arg, 0); 119 } 120 121 static void 122 dev_writev(struct spdk_bs_dev *dev, struct spdk_io_channel *channel, 123 struct iovec *iov, int iovcnt, 124 uint64_t lba, uint32_t lba_count, 125 struct spdk_bs_dev_cb_args *cb_args) 126 { 127 uint64_t offset, length; 128 int i; 129 130 offset = lba * DEV_BUFFER_BLOCKLEN; 131 length = lba_count * DEV_BUFFER_BLOCKLEN; 132 SPDK_CU_ASSERT_FATAL(offset + length <= DEV_BUFFER_SIZE); 133 __check_iov(iov, iovcnt, length); 134 135 for (i = 0; i < iovcnt; i++) { 136 memcpy(&g_dev_buffer[offset], iov[i].iov_base, iov[i].iov_len); 137 offset += iov[i].iov_len; 138 } 139 140 cb_args->cb_fn(cb_args->channel, cb_args->cb_arg, 0); 141 } 142 143 static void 144 dev_flush(struct spdk_bs_dev *dev, struct spdk_io_channel *channel, 145 struct spdk_bs_dev_cb_args *cb_args) 146 { 147 cb_args->cb_fn(cb_args->channel, cb_args->cb_arg, 0); 148 } 149 150 static void 151 dev_unmap(struct spdk_bs_dev *dev, struct spdk_io_channel *channel, 152 uint64_t lba, uint32_t lba_count, 153 struct spdk_bs_dev_cb_args *cb_args) 154 { 155 uint64_t offset, length; 156 157 offset = lba * DEV_BUFFER_BLOCKLEN; 158 length = lba_count * DEV_BUFFER_BLOCKLEN; 159 SPDK_CU_ASSERT_FATAL(offset + length <= DEV_BUFFER_SIZE); 160 memset(&g_dev_buffer[offset], 0, length); 161 cb_args->cb_fn(cb_args->channel, cb_args->cb_arg, 0); 162 } 163 164 static void 165 dev_write_zeroes(struct spdk_bs_dev *dev, struct spdk_io_channel *channel, 166 uint64_t lba, uint32_t lba_count, 167 struct spdk_bs_dev_cb_args *cb_args) 168 { 169 uint64_t offset, length; 170 171 offset = lba * DEV_BUFFER_BLOCKLEN; 172 length = lba_count * DEV_BUFFER_BLOCKLEN; 173 SPDK_CU_ASSERT_FATAL(offset + length <= DEV_BUFFER_SIZE); 174 memset(&g_dev_buffer[offset], 0, length); 175 cb_args->cb_fn(cb_args->channel, cb_args->cb_arg, 0); 176 } 177 178 static struct spdk_bs_dev * 179 init_dev(void) 180 { 181 struct spdk_bs_dev *dev = calloc(1, sizeof(*dev)); 182 183 SPDK_CU_ASSERT_FATAL(dev != NULL); 184 185 dev->create_channel = dev_create_channel; 186 dev->destroy_channel = dev_destroy_channel; 187 dev->destroy = dev_destroy; 188 dev->read = dev_read; 189 dev->write = dev_write; 190 dev->readv = dev_readv; 191 dev->writev = dev_writev; 192 dev->flush = dev_flush; 193 dev->unmap = dev_unmap; 194 dev->write_zeroes = dev_write_zeroes; 195 dev->blockcnt = DEV_BUFFER_BLOCKCNT; 196 dev->blocklen = DEV_BUFFER_BLOCKLEN; 197 198 return dev; 199 } 200