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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 | // SPDX-License-Identifier: GPL-2.0+ /* * Copyright (C) 2015 Google, Inc * Written by Simon Glass <sjg@chromium.org> * * This file contains dummy implementations of SCSI functions requried so * that CONFIG_SCSI can be enabled for sandbox. */ #define LOG_CATEGORY UCLASS_SCSI #include <dm.h> #include <os.h> #include <malloc.h> #include <scsi.h> #include <scsi_emul.h> enum { SANDBOX_SCSI_BLOCK_LEN = 512, SANDBOX_SCSI_BUF_SIZE = 512, }; /** * struct sandbox_scsi_priv * * @eminfo: emulator state * @pathanme: Path to the backing file, e.g. 'scsi.img' * @fd: File descriptor of backing file */ struct sandbox_scsi_priv { struct scsi_emul_info eminfo; const char *pathname; int fd; }; static int sandbox_scsi_exec(struct udevice *dev, struct scsi_cmd *req) { struct sandbox_scsi_priv *priv = dev_get_priv(dev); struct scsi_emul_info *info = &priv->eminfo; int ret; if (req->lun || req->target) return -EIO; ret = sb_scsi_emul_command(info, req, req->cmdlen); if (ret < 0) { log_debug("SCSI command 0x%02x ret errno %d\n", req->cmd[0], ret); return ret; } else if (ret == SCSI_EMUL_DO_READ && priv->fd != -1) { long bytes_read; log_debug("read %x %x\n", info->seek_block, info->read_len); os_lseek(priv->fd, info->seek_block * info->block_size, OS_SEEK_SET); bytes_read = os_read(priv->fd, req->pdata, info->buff_used); if (bytes_read < 0) return bytes_read; if (bytes_read != info->buff_used) return -EIO; } else if (!ret) { req->pdata = info->buff; info->phase = SCSIPH_STATUS; log_debug("sending buf\n"); } else { log_debug("error\n"); return -EIO; } return 0; } static int sandbox_scsi_bus_reset(struct udevice *dev) { /* Not implemented */ return 0; } static int sandbox_scsi_of_to_plat(struct udevice *dev) { struct sandbox_scsi_priv *priv = dev_get_priv(dev); priv->pathname = dev_read_string(dev, "sandbox,filepath"); return 0; } static int sandbox_scsi_probe(struct udevice *dev) { struct scsi_plat *scsi_plat = dev_get_uclass_plat(dev); struct sandbox_scsi_priv *priv = dev_get_priv(dev); struct scsi_emul_info *info = &priv->eminfo; int ret; scsi_plat->max_id = 2; scsi_plat->max_lun = 3; scsi_plat->max_bytes_per_req = 1 << 20; info->vendor = "SANDBOX"; info->product = "FAKE DISK"; info->buff = malloc(SANDBOX_SCSI_BUF_SIZE); if (!info->buff) return log_ret(-ENOMEM); info->block_size = SANDBOX_SCSI_BLOCK_LEN; if (priv->pathname) { const char *pathname = priv->pathname; char buf[256]; /* * Try persistent data directory first, then fall back to the * pathname as given (for absolute paths or current directory) */ if (!os_persistent_file(buf, sizeof(buf), priv->pathname)) pathname = buf; priv->fd = os_open(pathname, OS_O_RDONLY); if (priv->fd >= 0) { ret = os_get_filesize(pathname, &info->file_size); if (ret) return log_msg_ret("sz", ret); } } else { priv->fd = -1; } log_debug("filename: %s, fd %d\n", priv->pathname, priv->fd); return 0; } static int sandbox_scsi_remove(struct udevice *dev) { struct sandbox_scsi_priv *priv = dev_get_priv(dev); struct scsi_emul_info *info = &priv->eminfo; free(info->buff); return 0; } struct scsi_ops sandbox_scsi_ops = { .exec = sandbox_scsi_exec, .bus_reset = sandbox_scsi_bus_reset, }; static const struct udevice_id sanbox_scsi_ids[] = { { .compatible = "sandbox,scsi" }, { } }; U_BOOT_DRIVER(sandbox_scsi) = { .name = "sandbox_scsi", .id = UCLASS_SCSI, .ops = &sandbox_scsi_ops, .of_match = sanbox_scsi_ids, .of_to_plat = sandbox_scsi_of_to_plat, .probe = sandbox_scsi_probe, .remove = sandbox_scsi_remove, .priv_auto = sizeof(struct sandbox_scsi_priv), }; |