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 static struct spdk_io_channel * 40 dev_create_channel(struct spdk_bs_dev *dev) 41 { 42 return NULL; 43 } 44 45 static void 46 dev_destroy_channel(struct spdk_bs_dev *dev, struct spdk_io_channel *channel) 47 { 48 } 49 50 static void 51 dev_destroy(struct spdk_bs_dev *dev) 52 { 53 } 54 55 static void 56 dev_read(struct spdk_bs_dev *dev, struct spdk_io_channel *channel, void *payload, 57 uint64_t lba, uint32_t lba_count, 58 struct spdk_bs_dev_cb_args *cb_args) 59 { 60 uint64_t offset, length; 61 62 offset = lba * DEV_BUFFER_BLOCKLEN; 63 length = lba_count * DEV_BUFFER_BLOCKLEN; 64 SPDK_CU_ASSERT_FATAL(offset + length <= DEV_BUFFER_SIZE); 65 memcpy(payload, &g_dev_buffer[offset], length); 66 cb_args->cb_fn(cb_args->channel, cb_args->cb_arg, 0); 67 } 68 69 static void 70 dev_write(struct spdk_bs_dev *dev, struct spdk_io_channel *channel, void *payload, 71 uint64_t lba, uint32_t lba_count, 72 struct spdk_bs_dev_cb_args *cb_args) 73 { 74 uint64_t offset, length; 75 76 offset = lba * DEV_BUFFER_BLOCKLEN; 77 length = lba_count * DEV_BUFFER_BLOCKLEN; 78 SPDK_CU_ASSERT_FATAL(offset + length <= DEV_BUFFER_SIZE); 79 memcpy(&g_dev_buffer[offset], payload, length); 80 cb_args->cb_fn(cb_args->channel, cb_args->cb_arg, 0); 81 } 82 83 static void 84 dev_flush(struct spdk_bs_dev *dev, struct spdk_io_channel *channel, 85 struct spdk_bs_dev_cb_args *cb_args) 86 { 87 cb_args->cb_fn(cb_args->channel, cb_args->cb_arg, 0); 88 } 89 90 static void 91 dev_unmap(struct spdk_bs_dev *dev, struct spdk_io_channel *channel, 92 uint64_t lba, uint32_t lba_count, 93 struct spdk_bs_dev_cb_args *cb_args) 94 { 95 uint64_t offset, length; 96 97 offset = lba * DEV_BUFFER_BLOCKLEN; 98 length = lba_count * DEV_BUFFER_BLOCKLEN; 99 SPDK_CU_ASSERT_FATAL(offset + length <= DEV_BUFFER_SIZE); 100 memset(&g_dev_buffer[offset], 0, length); 101 cb_args->cb_fn(cb_args->channel, cb_args->cb_arg, 0); 102 } 103 104 static void 105 init_dev(struct spdk_bs_dev *dev) 106 { 107 dev->create_channel = dev_create_channel; 108 dev->destroy_channel = dev_destroy_channel; 109 dev->destroy = dev_destroy; 110 dev->read = dev_read; 111 dev->write = dev_write; 112 dev->flush = dev_flush; 113 dev->unmap = dev_unmap; 114 dev->blockcnt = DEV_BUFFER_BLOCKCNT; 115 dev->blocklen = DEV_BUFFER_BLOCKLEN; 116 } 117