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83d290c5 | 1 | // SPDX-License-Identifier: GPL-2.0+ |
84d39cbd SG |
2 | /* |
3 | * Copyright (C) 2015 Google, Inc | |
4 | * Written by Simon Glass <sjg@chromium.org> | |
5 | * | |
84d39cbd SG |
6 | * This file contains dummy implementations of SCSI functions requried so |
7 | * that CONFIG_SCSI can be enabled for sandbox. | |
8 | */ | |
9 | ||
46df0243 SG |
10 | #define LOG_CATEGORY UCLASS_SCSI |
11 | ||
d678a59d | 12 | #include <common.h> |
46df0243 SG |
13 | #include <dm.h> |
14 | #include <os.h> | |
15 | #include <malloc.h> | |
84d39cbd | 16 | #include <scsi.h> |
46df0243 SG |
17 | #include <scsi_emul.h> |
18 | ||
19 | enum { | |
20 | SANDBOX_SCSI_BLOCK_LEN = 512, | |
21 | SANDBOX_SCSI_BUF_SIZE = 512, | |
22 | }; | |
23 | ||
24 | /** | |
25 | * struct sandbox_scsi_priv | |
26 | * | |
27 | * @eminfo: emulator state | |
28 | * @pathanme: Path to the backing file, e.g. 'scsi.img' | |
29 | * @fd: File descriptor of backing file | |
30 | */ | |
31 | struct sandbox_scsi_priv { | |
32 | struct scsi_emul_info eminfo; | |
33 | const char *pathname; | |
34 | int fd; | |
35 | }; | |
84d39cbd | 36 | |
46df0243 | 37 | static int sandbox_scsi_exec(struct udevice *dev, struct scsi_cmd *req) |
84d39cbd | 38 | { |
46df0243 SG |
39 | struct sandbox_scsi_priv *priv = dev_get_priv(dev); |
40 | struct scsi_emul_info *info = &priv->eminfo; | |
41 | int ret; | |
42 | ||
43 | if (req->lun || req->target) | |
44 | return -EIO; | |
45 | ret = sb_scsi_emul_command(info, req, req->cmdlen); | |
46 | if (ret < 0) { | |
47 | log_debug("SCSI command 0x%02x ret errno %d\n", req->cmd[0], | |
48 | ret); | |
49 | return ret; | |
50 | } else if (ret == SCSI_EMUL_DO_READ && priv->fd != -1) { | |
51 | long bytes_read; | |
52 | ||
53 | log_debug("read %x %x\n", info->seek_block, info->read_len); | |
54 | os_lseek(priv->fd, info->seek_block * info->block_size, | |
55 | OS_SEEK_SET); | |
56 | bytes_read = os_read(priv->fd, req->pdata, info->buff_used); | |
57 | if (bytes_read < 0) | |
58 | return bytes_read; | |
59 | if (bytes_read != info->buff_used) | |
60 | return -EIO; | |
61 | } else if (!ret) { | |
62 | req->pdata = info->buff; | |
63 | info->phase = SCSIPH_STATUS; | |
64 | log_debug("sending buf\n"); | |
65 | } else { | |
66 | log_debug("error\n"); | |
67 | return -EIO; | |
68 | } | |
69 | ||
4682c8a1 | 70 | return 0; |
84d39cbd SG |
71 | } |
72 | ||
46df0243 | 73 | static int sandbox_scsi_bus_reset(struct udevice *dev) |
84d39cbd | 74 | { |
46df0243 SG |
75 | /* Not implemented */ |
76 | ||
77 | return 0; | |
84d39cbd SG |
78 | } |
79 | ||
46df0243 | 80 | static int sandbox_scsi_of_to_plat(struct udevice *dev) |
84d39cbd | 81 | { |
46df0243 SG |
82 | struct sandbox_scsi_priv *priv = dev_get_priv(dev); |
83 | ||
84 | priv->pathname = dev_read_string(dev, "sandbox,filepath"); | |
85 | ||
84d39cbd SG |
86 | return 0; |
87 | } | |
46df0243 SG |
88 | |
89 | static int sandbox_scsi_probe(struct udevice *dev) | |
90 | { | |
91 | struct scsi_plat *scsi_plat = dev_get_uclass_plat(dev); | |
92 | struct sandbox_scsi_priv *priv = dev_get_priv(dev); | |
93 | struct scsi_emul_info *info = &priv->eminfo; | |
94 | int ret; | |
95 | ||
96 | scsi_plat->max_id = 2; | |
97 | scsi_plat->max_lun = 3; | |
98 | scsi_plat->max_bytes_per_req = 1 << 20; | |
99 | ||
100 | info->vendor = "SANDBOX"; | |
101 | info->product = "FAKE DISK"; | |
102 | info->buff = malloc(SANDBOX_SCSI_BUF_SIZE); | |
103 | if (!info->buff) | |
104 | return log_ret(-ENOMEM); | |
105 | info->block_size = SANDBOX_SCSI_BLOCK_LEN; | |
106 | ||
107 | if (priv->pathname) { | |
108 | priv->fd = os_open(priv->pathname, OS_O_RDONLY); | |
109 | if (priv->fd != -1) { | |
110 | ret = os_get_filesize(priv->pathname, &info->file_size); | |
111 | if (ret) | |
112 | return log_msg_ret("sz", ret); | |
113 | } | |
114 | } else { | |
115 | priv->fd = -1; | |
116 | } | |
117 | log_debug("filename: %s, fd %d\n", priv->pathname, priv->fd); | |
118 | ||
119 | return 0; | |
120 | } | |
121 | ||
122 | static int sandbox_scsi_remove(struct udevice *dev) | |
123 | { | |
124 | struct sandbox_scsi_priv *priv = dev_get_priv(dev); | |
125 | struct scsi_emul_info *info = &priv->eminfo; | |
126 | ||
127 | free(info->buff); | |
128 | ||
129 | return 0; | |
130 | } | |
131 | ||
132 | struct scsi_ops sandbox_scsi_ops = { | |
133 | .exec = sandbox_scsi_exec, | |
134 | .bus_reset = sandbox_scsi_bus_reset, | |
135 | }; | |
136 | ||
137 | static const struct udevice_id sanbox_scsi_ids[] = { | |
138 | { .compatible = "sandbox,scsi" }, | |
139 | { } | |
140 | }; | |
141 | ||
142 | U_BOOT_DRIVER(sandbox_scsi) = { | |
143 | .name = "sandbox_scsi", | |
144 | .id = UCLASS_SCSI, | |
145 | .ops = &sandbox_scsi_ops, | |
146 | .of_match = sanbox_scsi_ids, | |
147 | .of_to_plat = sandbox_scsi_of_to_plat, | |
148 | .probe = sandbox_scsi_probe, | |
149 | .remove = sandbox_scsi_remove, | |
150 | .priv_auto = sizeof(struct sandbox_scsi_priv), | |
151 | }; |