root / hw / scsi-generic.c @ 74382217
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1 | 2cc977e2 | ths | /*
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2 | 2cc977e2 | ths | * Generic SCSI Device support
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3 | 2cc977e2 | ths | *
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4 | 2cc977e2 | ths | * Copyright (c) 2007 Bull S.A.S.
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5 | 2cc977e2 | ths | * Based on code by Paul Brook
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6 | 2cc977e2 | ths | * Based on code by Fabrice Bellard
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7 | 2cc977e2 | ths | *
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8 | 2cc977e2 | ths | * Written by Laurent Vivier <Laurent.Vivier@bull.net>
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9 | 2cc977e2 | ths | *
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10 | 2cc977e2 | ths | * This code is licenced under the LGPL.
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11 | 2cc977e2 | ths | *
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12 | 2cc977e2 | ths | */
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13 | 2cc977e2 | ths | |
14 | 2cc977e2 | ths | #include "qemu-common.h" |
15 | 2f792016 | Markus Armbruster | #include "qemu-error.h" |
16 | 43b443b6 | Gerd Hoffmann | #include "scsi.h" |
17 | 2446333c | Blue Swirl | #include "blockdev.h" |
18 | 2cc977e2 | ths | |
19 | d52affa7 | Gerd Hoffmann | #ifdef __linux__
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20 | 2cc977e2 | ths | |
21 | 2cc977e2 | ths | //#define DEBUG_SCSI
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22 | 2cc977e2 | ths | |
23 | 2cc977e2 | ths | #ifdef DEBUG_SCSI
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24 | 001faf32 | Blue Swirl | #define DPRINTF(fmt, ...) \
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25 | 001faf32 | Blue Swirl | do { printf("scsi-generic: " fmt , ## __VA_ARGS__); } while (0) |
26 | 2cc977e2 | ths | #else
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27 | 001faf32 | Blue Swirl | #define DPRINTF(fmt, ...) do {} while(0) |
28 | 2cc977e2 | ths | #endif
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29 | 2cc977e2 | ths | |
30 | 001faf32 | Blue Swirl | #define BADF(fmt, ...) \
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31 | 001faf32 | Blue Swirl | do { fprintf(stderr, "scsi-generic: " fmt , ## __VA_ARGS__); } while (0) |
32 | 2cc977e2 | ths | |
33 | 2cc977e2 | ths | #include <stdio.h> |
34 | 2cc977e2 | ths | #include <sys/types.h> |
35 | 2cc977e2 | ths | #include <sys/stat.h> |
36 | 2cc977e2 | ths | #include <unistd.h> |
37 | 2cc977e2 | ths | #include <scsi/sg.h> |
38 | 0d65e1f8 | Gerd Hoffmann | #include "scsi-defs.h" |
39 | 2cc977e2 | ths | |
40 | a9dd6843 | aliguori | #define SCSI_SENSE_BUF_SIZE 96 |
41 | 2cc977e2 | ths | |
42 | 2cc977e2 | ths | #define SG_ERR_DRIVER_TIMEOUT 0x06 |
43 | 2cc977e2 | ths | #define SG_ERR_DRIVER_SENSE 0x08 |
44 | 2cc977e2 | ths | |
45 | 2cc977e2 | ths | #ifndef MAX_UINT
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46 | 2cc977e2 | ths | #define MAX_UINT ((unsigned int)-1) |
47 | 2cc977e2 | ths | #endif
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48 | 2cc977e2 | ths | |
49 | d52affa7 | Gerd Hoffmann | typedef struct SCSIGenericState SCSIGenericState; |
50 | d52affa7 | Gerd Hoffmann | |
51 | 4c41d2ef | Gerd Hoffmann | typedef struct SCSIGenericReq { |
52 | 4c41d2ef | Gerd Hoffmann | SCSIRequest req; |
53 | 2cc977e2 | ths | uint8_t *buf; |
54 | 2cc977e2 | ths | int buflen;
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55 | 2cc977e2 | ths | int len;
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56 | 2cc977e2 | ths | sg_io_hdr_t io_header; |
57 | 4c41d2ef | Gerd Hoffmann | } SCSIGenericReq; |
58 | 2cc977e2 | ths | |
59 | d52affa7 | Gerd Hoffmann | struct SCSIGenericState
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60 | 2cc977e2 | ths | { |
61 | d52affa7 | Gerd Hoffmann | SCSIDevice qdev; |
62 | 428c149b | Christoph Hellwig | BlockDriverState *bs; |
63 | 2cc977e2 | ths | int lun;
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64 | 2cc977e2 | ths | int driver_status;
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65 | 2cc977e2 | ths | uint8_t sensebuf[SCSI_SENSE_BUF_SIZE]; |
66 | 89c0f643 | aurel32 | uint8_t senselen; |
67 | 2cc977e2 | ths | }; |
68 | 2cc977e2 | ths | |
69 | a1f0cce2 | Hannes Reinecke | static void scsi_set_sense(SCSIGenericState *s, SCSISense sense) |
70 | a1f0cce2 | Hannes Reinecke | { |
71 | a1f0cce2 | Hannes Reinecke | s->senselen = scsi_build_sense(sense, s->sensebuf, SCSI_SENSE_BUF_SIZE, 0);
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72 | a1f0cce2 | Hannes Reinecke | s->driver_status = SG_ERR_DRIVER_SENSE; |
73 | a1f0cce2 | Hannes Reinecke | } |
74 | a1f0cce2 | Hannes Reinecke | |
75 | a1f0cce2 | Hannes Reinecke | static void scsi_clear_sense(SCSIGenericState *s) |
76 | a1f0cce2 | Hannes Reinecke | { |
77 | a1f0cce2 | Hannes Reinecke | memset(s->sensebuf, 0, SCSI_SENSE_BUF_SIZE);
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78 | a1f0cce2 | Hannes Reinecke | s->senselen = 0;
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79 | a1f0cce2 | Hannes Reinecke | s->driver_status = 0;
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80 | a1f0cce2 | Hannes Reinecke | } |
81 | a1f0cce2 | Hannes Reinecke | |
82 | 74382217 | Hannes Reinecke | static int scsi_get_sense(SCSIRequest *req, uint8_t *outbuf, int len) |
83 | 74382217 | Hannes Reinecke | { |
84 | 74382217 | Hannes Reinecke | SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev, req->dev); |
85 | 74382217 | Hannes Reinecke | int size = SCSI_SENSE_BUF_SIZE;
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86 | 74382217 | Hannes Reinecke | |
87 | 74382217 | Hannes Reinecke | if (!(s->driver_status & SG_ERR_DRIVER_SENSE)) {
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88 | 74382217 | Hannes Reinecke | size = scsi_build_sense(SENSE_CODE(NO_SENSE), s->sensebuf, |
89 | 74382217 | Hannes Reinecke | SCSI_SENSE_BUF_SIZE, 0);
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90 | 74382217 | Hannes Reinecke | } |
91 | 74382217 | Hannes Reinecke | if (size > len) {
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92 | 74382217 | Hannes Reinecke | size = len; |
93 | 74382217 | Hannes Reinecke | } |
94 | 74382217 | Hannes Reinecke | memcpy(outbuf, s->sensebuf, size); |
95 | 74382217 | Hannes Reinecke | |
96 | 74382217 | Hannes Reinecke | return size;
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97 | 74382217 | Hannes Reinecke | } |
98 | 74382217 | Hannes Reinecke | |
99 | 5c6c0e51 | Hannes Reinecke | static SCSIRequest *scsi_new_request(SCSIDevice *d, uint32_t tag, uint32_t lun)
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100 | 2cc977e2 | ths | { |
101 | 89b08ae1 | Gerd Hoffmann | SCSIRequest *req; |
102 | 2cc977e2 | ths | |
103 | 89b08ae1 | Gerd Hoffmann | req = scsi_req_alloc(sizeof(SCSIGenericReq), d, tag, lun);
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104 | 5c6c0e51 | Hannes Reinecke | return req;
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105 | 2cc977e2 | ths | } |
106 | 2cc977e2 | ths | |
107 | ad2d30f7 | Paolo Bonzini | static void scsi_free_request(SCSIRequest *req) |
108 | 2cc977e2 | ths | { |
109 | ad2d30f7 | Paolo Bonzini | SCSIGenericReq *r = DO_UPCAST(SCSIGenericReq, req, req); |
110 | ad2d30f7 | Paolo Bonzini | |
111 | 9af99d98 | Gerd Hoffmann | qemu_free(r->buf); |
112 | 2cc977e2 | ths | } |
113 | 2cc977e2 | ths | |
114 | 2cc977e2 | ths | /* Helper function for command completion. */
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115 | 2cc977e2 | ths | static void scsi_command_complete(void *opaque, int ret) |
116 | 2cc977e2 | ths | { |
117 | 4c41d2ef | Gerd Hoffmann | SCSIGenericReq *r = (SCSIGenericReq *)opaque; |
118 | 4c41d2ef | Gerd Hoffmann | SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev, r->req.dev); |
119 | 2cc977e2 | ths | |
120 | d33e0ce2 | Paolo Bonzini | r->req.aiocb = NULL;
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121 | 2cc977e2 | ths | s->driver_status = r->io_header.driver_status; |
122 | 89c0f643 | aurel32 | if (s->driver_status & SG_ERR_DRIVER_SENSE)
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123 | 89c0f643 | aurel32 | s->senselen = r->io_header.sb_len_wr; |
124 | 89c0f643 | aurel32 | |
125 | a1f0cce2 | Hannes Reinecke | if (ret != 0) { |
126 | a1f0cce2 | Hannes Reinecke | switch (ret) {
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127 | a1f0cce2 | Hannes Reinecke | case -EINVAL:
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128 | a1f0cce2 | Hannes Reinecke | r->req.status = CHECK_CONDITION; |
129 | a1f0cce2 | Hannes Reinecke | scsi_set_sense(s, SENSE_CODE(INVALID_FIELD)); |
130 | a1f0cce2 | Hannes Reinecke | break;
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131 | a1f0cce2 | Hannes Reinecke | case -ENOMEM:
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132 | a1f0cce2 | Hannes Reinecke | r->req.status = CHECK_CONDITION; |
133 | a1f0cce2 | Hannes Reinecke | scsi_set_sense(s, SENSE_CODE(TARGET_FAILURE)); |
134 | a1f0cce2 | Hannes Reinecke | break;
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135 | a1f0cce2 | Hannes Reinecke | default:
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136 | a1f0cce2 | Hannes Reinecke | r->req.status = CHECK_CONDITION; |
137 | a1f0cce2 | Hannes Reinecke | scsi_set_sense(s, SENSE_CODE(IO_ERROR)); |
138 | a1f0cce2 | Hannes Reinecke | break;
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139 | a1f0cce2 | Hannes Reinecke | } |
140 | a1f0cce2 | Hannes Reinecke | } else {
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141 | 2cc977e2 | ths | if (s->driver_status & SG_ERR_DRIVER_TIMEOUT) {
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142 | f0171327 | Hannes Reinecke | r->req.status = BUSY; |
143 | 2cc977e2 | ths | BADF("Driver Timeout\n");
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144 | 89c0f643 | aurel32 | } else if (r->io_header.status) |
145 | ed3a34a3 | Gerd Hoffmann | r->req.status = r->io_header.status; |
146 | 89c0f643 | aurel32 | else if (s->driver_status & SG_ERR_DRIVER_SENSE) |
147 | f0171327 | Hannes Reinecke | r->req.status = CHECK_CONDITION; |
148 | 2cc977e2 | ths | else
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149 | f0171327 | Hannes Reinecke | r->req.status = GOOD; |
150 | 2cc977e2 | ths | } |
151 | 89c0f643 | aurel32 | DPRINTF("Command complete 0x%p tag=0x%x status=%d\n",
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152 | ed3a34a3 | Gerd Hoffmann | r, r->req.tag, r->req.status); |
153 | ed3a34a3 | Gerd Hoffmann | |
154 | ed3a34a3 | Gerd Hoffmann | scsi_req_complete(&r->req); |
155 | 2cc977e2 | ths | } |
156 | 2cc977e2 | ths | |
157 | 2cc977e2 | ths | /* Cancel a pending data transfer. */
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158 | 5c6c0e51 | Hannes Reinecke | static void scsi_cancel_io(SCSIRequest *req) |
159 | 2cc977e2 | ths | { |
160 | 5c6c0e51 | Hannes Reinecke | SCSIGenericReq *r = DO_UPCAST(SCSIGenericReq, req, req); |
161 | 5c6c0e51 | Hannes Reinecke | |
162 | 5c6c0e51 | Hannes Reinecke | DPRINTF("Cancel tag=0x%x\n", req->tag);
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163 | 5c6c0e51 | Hannes Reinecke | if (r->req.aiocb) {
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164 | 5c6c0e51 | Hannes Reinecke | bdrv_aio_cancel(r->req.aiocb); |
165 | 2cc977e2 | ths | } |
166 | 5c6c0e51 | Hannes Reinecke | r->req.aiocb = NULL;
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167 | 2cc977e2 | ths | } |
168 | 2cc977e2 | ths | |
169 | 2cc977e2 | ths | static int execute_command(BlockDriverState *bdrv, |
170 | 4c41d2ef | Gerd Hoffmann | SCSIGenericReq *r, int direction,
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171 | 2cc977e2 | ths | BlockDriverCompletionFunc *complete) |
172 | 2cc977e2 | ths | { |
173 | 4c41d2ef | Gerd Hoffmann | SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev, r->req.dev); |
174 | 4c41d2ef | Gerd Hoffmann | |
175 | 2cc977e2 | ths | r->io_header.interface_id = 'S';
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176 | 2cc977e2 | ths | r->io_header.dxfer_direction = direction; |
177 | 2cc977e2 | ths | r->io_header.dxferp = r->buf; |
178 | 2cc977e2 | ths | r->io_header.dxfer_len = r->buflen; |
179 | 29362ebe | Gerd Hoffmann | r->io_header.cmdp = r->req.cmd.buf; |
180 | 29362ebe | Gerd Hoffmann | r->io_header.cmd_len = r->req.cmd.len; |
181 | 4c41d2ef | Gerd Hoffmann | r->io_header.mx_sb_len = sizeof(s->sensebuf);
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182 | 4c41d2ef | Gerd Hoffmann | r->io_header.sbp = s->sensebuf; |
183 | 2cc977e2 | ths | r->io_header.timeout = MAX_UINT; |
184 | 2cc977e2 | ths | r->io_header.usr_ptr = r; |
185 | 2cc977e2 | ths | r->io_header.flags |= SG_FLAG_DIRECT_IO; |
186 | 2cc977e2 | ths | |
187 | 4c41d2ef | Gerd Hoffmann | r->req.aiocb = bdrv_aio_ioctl(bdrv, SG_IO, &r->io_header, complete, r); |
188 | 4c41d2ef | Gerd Hoffmann | if (r->req.aiocb == NULL) { |
189 | 2cc977e2 | ths | BADF("execute_command: read failed !\n");
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190 | a1f0cce2 | Hannes Reinecke | return -ENOMEM;
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191 | 2cc977e2 | ths | } |
192 | 2cc977e2 | ths | |
193 | 2cc977e2 | ths | return 0; |
194 | 2cc977e2 | ths | } |
195 | 2cc977e2 | ths | |
196 | 2cc977e2 | ths | static void scsi_read_complete(void * opaque, int ret) |
197 | 2cc977e2 | ths | { |
198 | 4c41d2ef | Gerd Hoffmann | SCSIGenericReq *r = (SCSIGenericReq *)opaque; |
199 | 2cc977e2 | ths | int len;
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200 | 2cc977e2 | ths | |
201 | d33e0ce2 | Paolo Bonzini | r->req.aiocb = NULL;
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202 | 2cc977e2 | ths | if (ret) {
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203 | aa2b1e89 | Bernhard Kohl | DPRINTF("IO error ret %d\n", ret);
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204 | 2cc977e2 | ths | scsi_command_complete(r, ret); |
205 | 2cc977e2 | ths | return;
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206 | 2cc977e2 | ths | } |
207 | 2cc977e2 | ths | len = r->io_header.dxfer_len - r->io_header.resid; |
208 | 4c41d2ef | Gerd Hoffmann | DPRINTF("Data ready tag=0x%x len=%d\n", r->req.tag, len);
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209 | 2cc977e2 | ths | |
210 | 2cc977e2 | ths | r->len = -1;
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211 | 40f16dd1 | Paolo Bonzini | if (len == 0) { |
212 | 89c0f643 | aurel32 | scsi_command_complete(r, 0);
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213 | 40f16dd1 | Paolo Bonzini | } else {
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214 | ab9adc88 | Paolo Bonzini | scsi_req_data(&r->req, len); |
215 | 40f16dd1 | Paolo Bonzini | } |
216 | 2cc977e2 | ths | } |
217 | 2cc977e2 | ths | |
218 | 2cc977e2 | ths | /* Read more data from scsi device into buffer. */
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219 | 5c6c0e51 | Hannes Reinecke | static void scsi_read_data(SCSIRequest *req) |
220 | 2cc977e2 | ths | { |
221 | 5c6c0e51 | Hannes Reinecke | SCSIGenericReq *r = DO_UPCAST(SCSIGenericReq, req, req); |
222 | 5c6c0e51 | Hannes Reinecke | SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev, r->req.dev); |
223 | 2cc977e2 | ths | int ret;
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224 | 2cc977e2 | ths | |
225 | 5c6c0e51 | Hannes Reinecke | DPRINTF("scsi_read_data 0x%x\n", req->tag);
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226 | 2cc977e2 | ths | if (r->len == -1) { |
227 | 2cc977e2 | ths | scsi_command_complete(r, 0);
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228 | 2cc977e2 | ths | return;
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229 | 2cc977e2 | ths | } |
230 | 2cc977e2 | ths | |
231 | 29362ebe | Gerd Hoffmann | if (r->req.cmd.buf[0] == REQUEST_SENSE && s->driver_status & SG_ERR_DRIVER_SENSE) |
232 | 2cc977e2 | ths | { |
233 | 89c0f643 | aurel32 | s->senselen = MIN(r->len, s->senselen); |
234 | 89c0f643 | aurel32 | memcpy(r->buf, s->sensebuf, s->senselen); |
235 | 2cc977e2 | ths | r->io_header.driver_status = 0;
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236 | 89c0f643 | aurel32 | r->io_header.status = 0;
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237 | 89c0f643 | aurel32 | r->io_header.dxfer_len = s->senselen; |
238 | 2cc977e2 | ths | r->len = -1;
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239 | 4c41d2ef | Gerd Hoffmann | DPRINTF("Data ready tag=0x%x len=%d\n", r->req.tag, s->senselen);
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240 | a9dd6843 | aliguori | DPRINTF("Sense: %d %d %d %d %d %d %d %d\n",
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241 | a9dd6843 | aliguori | r->buf[0], r->buf[1], r->buf[2], r->buf[3], |
242 | a9dd6843 | aliguori | r->buf[4], r->buf[5], r->buf[6], r->buf[7]); |
243 | ab9adc88 | Paolo Bonzini | scsi_req_data(&r->req, s->senselen); |
244 | a1f0cce2 | Hannes Reinecke | /* Clear sensebuf after REQUEST_SENSE */
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245 | a1f0cce2 | Hannes Reinecke | scsi_clear_sense(s); |
246 | 2cc977e2 | ths | return;
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247 | 2cc977e2 | ths | } |
248 | 2cc977e2 | ths | |
249 | 428c149b | Christoph Hellwig | ret = execute_command(s->bs, r, SG_DXFER_FROM_DEV, scsi_read_complete); |
250 | a1f0cce2 | Hannes Reinecke | if (ret < 0) { |
251 | a1f0cce2 | Hannes Reinecke | scsi_command_complete(r, ret); |
252 | 2cc977e2 | ths | return;
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253 | 2cc977e2 | ths | } |
254 | 2cc977e2 | ths | } |
255 | 2cc977e2 | ths | |
256 | 2cc977e2 | ths | static void scsi_write_complete(void * opaque, int ret) |
257 | 2cc977e2 | ths | { |
258 | 4c41d2ef | Gerd Hoffmann | SCSIGenericReq *r = (SCSIGenericReq *)opaque; |
259 | 4c41d2ef | Gerd Hoffmann | SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev, r->req.dev); |
260 | 2cc977e2 | ths | |
261 | 2cc977e2 | ths | DPRINTF("scsi_write_complete() ret = %d\n", ret);
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262 | d33e0ce2 | Paolo Bonzini | r->req.aiocb = NULL;
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263 | 2cc977e2 | ths | if (ret) {
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264 | 2cc977e2 | ths | DPRINTF("IO error\n");
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265 | 2cc977e2 | ths | scsi_command_complete(r, ret); |
266 | 2cc977e2 | ths | return;
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267 | 2cc977e2 | ths | } |
268 | 2cc977e2 | ths | |
269 | 29362ebe | Gerd Hoffmann | if (r->req.cmd.buf[0] == MODE_SELECT && r->req.cmd.buf[4] == 12 && |
270 | 91376656 | Gerd Hoffmann | s->qdev.type == TYPE_TAPE) { |
271 | b07995e3 | Gerd Hoffmann | s->qdev.blocksize = (r->buf[9] << 16) | (r->buf[10] << 8) | r->buf[11]; |
272 | aa2b1e89 | Bernhard Kohl | DPRINTF("block size %d\n", s->qdev.blocksize);
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273 | 89c0f643 | aurel32 | } |
274 | 89c0f643 | aurel32 | |
275 | 2cc977e2 | ths | scsi_command_complete(r, ret); |
276 | 2cc977e2 | ths | } |
277 | 2cc977e2 | ths | |
278 | 2cc977e2 | ths | /* Write data to a scsi device. Returns nonzero on failure.
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279 | 2cc977e2 | ths | The transfer may complete asynchronously. */
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280 | 5c6c0e51 | Hannes Reinecke | static int scsi_write_data(SCSIRequest *req) |
281 | 2cc977e2 | ths | { |
282 | 5c6c0e51 | Hannes Reinecke | SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev, req->dev); |
283 | 5c6c0e51 | Hannes Reinecke | SCSIGenericReq *r = DO_UPCAST(SCSIGenericReq, req, req); |
284 | 2cc977e2 | ths | int ret;
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285 | 2cc977e2 | ths | |
286 | 5c6c0e51 | Hannes Reinecke | DPRINTF("scsi_write_data 0x%x\n", req->tag);
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287 | 2cc977e2 | ths | if (r->len == 0) { |
288 | 2cc977e2 | ths | r->len = r->buflen; |
289 | ab9adc88 | Paolo Bonzini | scsi_req_data(&r->req, r->len); |
290 | 2cc977e2 | ths | return 0; |
291 | 2cc977e2 | ths | } |
292 | 2cc977e2 | ths | |
293 | 428c149b | Christoph Hellwig | ret = execute_command(s->bs, r, SG_DXFER_TO_DEV, scsi_write_complete); |
294 | a1f0cce2 | Hannes Reinecke | if (ret < 0) { |
295 | a1f0cce2 | Hannes Reinecke | scsi_command_complete(r, ret); |
296 | 2cc977e2 | ths | return 1; |
297 | 2cc977e2 | ths | } |
298 | 2cc977e2 | ths | |
299 | 2cc977e2 | ths | return 0; |
300 | 2cc977e2 | ths | } |
301 | 2cc977e2 | ths | |
302 | 2cc977e2 | ths | /* Return a pointer to the data buffer. */
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303 | 5c6c0e51 | Hannes Reinecke | static uint8_t *scsi_get_buf(SCSIRequest *req)
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304 | 2cc977e2 | ths | { |
305 | 5c6c0e51 | Hannes Reinecke | SCSIGenericReq *r = DO_UPCAST(SCSIGenericReq, req, req); |
306 | 5c6c0e51 | Hannes Reinecke | |
307 | 2cc977e2 | ths | return r->buf;
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308 | 2cc977e2 | ths | } |
309 | 2cc977e2 | ths | |
310 | 2ec749cb | Gerd Hoffmann | static void scsi_req_fixup(SCSIRequest *req) |
311 | 2cc977e2 | ths | { |
312 | 2ec749cb | Gerd Hoffmann | switch(req->cmd.buf[0]) { |
313 | 2cc977e2 | ths | case WRITE_10:
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314 | 2ec749cb | Gerd Hoffmann | req->cmd.buf[1] &= ~0x08; /* disable FUA */ |
315 | 2cc977e2 | ths | break;
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316 | 2cc977e2 | ths | case READ_10:
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317 | 2ec749cb | Gerd Hoffmann | req->cmd.buf[1] &= ~0x08; /* disable FUA */ |
318 | a9dd6843 | aliguori | break;
|
319 | a9dd6843 | aliguori | case REWIND:
|
320 | a9dd6843 | aliguori | case START_STOP:
|
321 | 2ec749cb | Gerd Hoffmann | if (req->dev->type == TYPE_TAPE) {
|
322 | 2ec749cb | Gerd Hoffmann | /* force IMMED, otherwise qemu waits end of command */
|
323 | 2ec749cb | Gerd Hoffmann | req->cmd.buf[1] = 0x01; |
324 | 2ec749cb | Gerd Hoffmann | } |
325 | a9dd6843 | aliguori | break;
|
326 | a9dd6843 | aliguori | } |
327 | a9dd6843 | aliguori | } |
328 | a9dd6843 | aliguori | |
329 | 2cc977e2 | ths | /* Execute a scsi command. Returns the length of the data expected by the
|
330 | 2cc977e2 | ths | command. This will be Positive for data transfers from the device
|
331 | 2cc977e2 | ths | (eg. disk reads), negative for transfers to the device (eg. disk writes),
|
332 | 2cc977e2 | ths | and zero if the command does not transfer any data. */
|
333 | 2cc977e2 | ths | |
334 | 5c6c0e51 | Hannes Reinecke | static int32_t scsi_send_command(SCSIRequest *req, uint8_t *cmd)
|
335 | 2cc977e2 | ths | { |
336 | 5c6c0e51 | Hannes Reinecke | SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev, req->dev); |
337 | 5c6c0e51 | Hannes Reinecke | SCSIGenericReq *r = DO_UPCAST(SCSIGenericReq, req, req); |
338 | 2cc977e2 | ths | int ret;
|
339 | 2cc977e2 | ths | |
340 | 89c0f643 | aurel32 | if (cmd[0] != REQUEST_SENSE && |
341 | 5c6c0e51 | Hannes Reinecke | (req->lun != s->lun || (cmd[1] >> 5) != s->lun)) { |
342 | 5c6c0e51 | Hannes Reinecke | DPRINTF("Unimplemented LUN %d\n", req->lun ? req->lun : cmd[1] >> 5); |
343 | a1f0cce2 | Hannes Reinecke | scsi_set_sense(s, SENSE_CODE(LUN_NOT_SUPPORTED)); |
344 | 2b8b3bb9 | Paolo Bonzini | r->req.status = CHECK_CONDITION; |
345 | 2b8b3bb9 | Paolo Bonzini | scsi_req_complete(&r->req); |
346 | 89c0f643 | aurel32 | return 0; |
347 | 89c0f643 | aurel32 | } |
348 | 89c0f643 | aurel32 | |
349 | 2ec749cb | Gerd Hoffmann | if (-1 == scsi_req_parse(&r->req, cmd)) { |
350 | 2ec749cb | Gerd Hoffmann | BADF("Unsupported command length, command %x\n", cmd[0]); |
351 | a1f0cce2 | Hannes Reinecke | scsi_command_complete(r, -EINVAL); |
352 | 2ec749cb | Gerd Hoffmann | return 0; |
353 | 2ec749cb | Gerd Hoffmann | } |
354 | 2ec749cb | Gerd Hoffmann | scsi_req_fixup(&r->req); |
355 | 2ec749cb | Gerd Hoffmann | |
356 | aa2b1e89 | Bernhard Kohl | DPRINTF("Command: lun=%d tag=0x%x len %zd data=0x%02x", lun, tag,
|
357 | aa2b1e89 | Bernhard Kohl | r->req.cmd.xfer, cmd[0]);
|
358 | aa2b1e89 | Bernhard Kohl | |
359 | aa2b1e89 | Bernhard Kohl | #ifdef DEBUG_SCSI
|
360 | aa2b1e89 | Bernhard Kohl | { |
361 | aa2b1e89 | Bernhard Kohl | int i;
|
362 | aa2b1e89 | Bernhard Kohl | for (i = 1; i < r->req.cmd.len; i++) { |
363 | aa2b1e89 | Bernhard Kohl | printf(" 0x%02x", cmd[i]);
|
364 | aa2b1e89 | Bernhard Kohl | } |
365 | aa2b1e89 | Bernhard Kohl | printf("\n");
|
366 | aa2b1e89 | Bernhard Kohl | } |
367 | aa2b1e89 | Bernhard Kohl | #endif
|
368 | 2cc977e2 | ths | |
369 | 2ec749cb | Gerd Hoffmann | if (r->req.cmd.xfer == 0) { |
370 | 2cc977e2 | ths | if (r->buf != NULL) |
371 | e3c916e6 | Jean-Christophe DUBOIS | qemu_free(r->buf); |
372 | 2cc977e2 | ths | r->buflen = 0;
|
373 | 2cc977e2 | ths | r->buf = NULL;
|
374 | 428c149b | Christoph Hellwig | ret = execute_command(s->bs, r, SG_DXFER_NONE, scsi_command_complete); |
375 | a1f0cce2 | Hannes Reinecke | if (ret < 0) { |
376 | a1f0cce2 | Hannes Reinecke | scsi_command_complete(r, ret); |
377 | a1f0cce2 | Hannes Reinecke | return 0; |
378 | 2cc977e2 | ths | } |
379 | 2cc977e2 | ths | return 0; |
380 | 2cc977e2 | ths | } |
381 | 2cc977e2 | ths | |
382 | 2ec749cb | Gerd Hoffmann | if (r->buflen != r->req.cmd.xfer) {
|
383 | 2cc977e2 | ths | if (r->buf != NULL) |
384 | e3c916e6 | Jean-Christophe DUBOIS | qemu_free(r->buf); |
385 | 2ec749cb | Gerd Hoffmann | r->buf = qemu_malloc(r->req.cmd.xfer); |
386 | 2ec749cb | Gerd Hoffmann | r->buflen = r->req.cmd.xfer; |
387 | 2cc977e2 | ths | } |
388 | 2cc977e2 | ths | |
389 | 2cc977e2 | ths | memset(r->buf, 0, r->buflen);
|
390 | 2ec749cb | Gerd Hoffmann | r->len = r->req.cmd.xfer; |
391 | 97a06435 | Gerd Hoffmann | if (r->req.cmd.mode == SCSI_XFER_TO_DEV) {
|
392 | 2cc977e2 | ths | r->len = 0;
|
393 | 5c6c0e51 | Hannes Reinecke | return -r->req.cmd.xfer;
|
394 | ad2d30f7 | Paolo Bonzini | } else {
|
395 | 5c6c0e51 | Hannes Reinecke | return r->req.cmd.xfer;
|
396 | 2cc977e2 | ths | } |
397 | 2cc977e2 | ths | } |
398 | 2cc977e2 | ths | |
399 | 2cc977e2 | ths | static int get_blocksize(BlockDriverState *bdrv) |
400 | 2cc977e2 | ths | { |
401 | 2cc977e2 | ths | uint8_t cmd[10];
|
402 | 2cc977e2 | ths | uint8_t buf[8];
|
403 | 2cc977e2 | ths | uint8_t sensebuf[8];
|
404 | 2cc977e2 | ths | sg_io_hdr_t io_header; |
405 | 2cc977e2 | ths | int ret;
|
406 | 2cc977e2 | ths | |
407 | 4f26a486 | aliguori | memset(cmd, 0, sizeof(cmd)); |
408 | 4f26a486 | aliguori | memset(buf, 0, sizeof(buf)); |
409 | 2cc977e2 | ths | cmd[0] = READ_CAPACITY;
|
410 | 2cc977e2 | ths | |
411 | 2cc977e2 | ths | memset(&io_header, 0, sizeof(io_header)); |
412 | 2cc977e2 | ths | io_header.interface_id = 'S';
|
413 | 2cc977e2 | ths | io_header.dxfer_direction = SG_DXFER_FROM_DEV; |
414 | 2cc977e2 | ths | io_header.dxfer_len = sizeof(buf);
|
415 | 2cc977e2 | ths | io_header.dxferp = buf; |
416 | 2cc977e2 | ths | io_header.cmdp = cmd; |
417 | 2cc977e2 | ths | io_header.cmd_len = sizeof(cmd);
|
418 | 2cc977e2 | ths | io_header.mx_sb_len = sizeof(sensebuf);
|
419 | 2cc977e2 | ths | io_header.sbp = sensebuf; |
420 | 2cc977e2 | ths | io_header.timeout = 6000; /* XXX */ |
421 | 2cc977e2 | ths | |
422 | 221f715d | aliguori | ret = bdrv_ioctl(bdrv, SG_IO, &io_header); |
423 | 7d780669 | aliguori | if (ret < 0) |
424 | 2cc977e2 | ths | return -1; |
425 | 2cc977e2 | ths | |
426 | 2cc977e2 | ths | return (buf[4] << 24) | (buf[5] << 16) | (buf[6] << 8) | buf[7]; |
427 | 2cc977e2 | ths | } |
428 | 2cc977e2 | ths | |
429 | 89c0f643 | aurel32 | static int get_stream_blocksize(BlockDriverState *bdrv) |
430 | 89c0f643 | aurel32 | { |
431 | 89c0f643 | aurel32 | uint8_t cmd[6];
|
432 | 89c0f643 | aurel32 | uint8_t buf[12];
|
433 | 89c0f643 | aurel32 | uint8_t sensebuf[8];
|
434 | 89c0f643 | aurel32 | sg_io_hdr_t io_header; |
435 | 89c0f643 | aurel32 | int ret;
|
436 | 89c0f643 | aurel32 | |
437 | 89c0f643 | aurel32 | memset(cmd, 0, sizeof(cmd)); |
438 | 89c0f643 | aurel32 | memset(buf, 0, sizeof(buf)); |
439 | 89c0f643 | aurel32 | cmd[0] = MODE_SENSE;
|
440 | 89c0f643 | aurel32 | cmd[4] = sizeof(buf); |
441 | 89c0f643 | aurel32 | |
442 | 89c0f643 | aurel32 | memset(&io_header, 0, sizeof(io_header)); |
443 | 89c0f643 | aurel32 | io_header.interface_id = 'S';
|
444 | 89c0f643 | aurel32 | io_header.dxfer_direction = SG_DXFER_FROM_DEV; |
445 | 89c0f643 | aurel32 | io_header.dxfer_len = sizeof(buf);
|
446 | 89c0f643 | aurel32 | io_header.dxferp = buf; |
447 | 89c0f643 | aurel32 | io_header.cmdp = cmd; |
448 | 89c0f643 | aurel32 | io_header.cmd_len = sizeof(cmd);
|
449 | 89c0f643 | aurel32 | io_header.mx_sb_len = sizeof(sensebuf);
|
450 | 89c0f643 | aurel32 | io_header.sbp = sensebuf; |
451 | 89c0f643 | aurel32 | io_header.timeout = 6000; /* XXX */ |
452 | 89c0f643 | aurel32 | |
453 | 221f715d | aliguori | ret = bdrv_ioctl(bdrv, SG_IO, &io_header); |
454 | 7d780669 | aliguori | if (ret < 0) |
455 | 89c0f643 | aurel32 | return -1; |
456 | 89c0f643 | aurel32 | |
457 | 89c0f643 | aurel32 | return (buf[9] << 16) | (buf[10] << 8) | buf[11]; |
458 | 89c0f643 | aurel32 | } |
459 | 89c0f643 | aurel32 | |
460 | f8b6d672 | Bernhard Kohl | static void scsi_generic_reset(DeviceState *dev) |
461 | f8b6d672 | Bernhard Kohl | { |
462 | f8b6d672 | Bernhard Kohl | SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev.qdev, dev); |
463 | f8b6d672 | Bernhard Kohl | |
464 | c557e889 | Paolo Bonzini | scsi_device_purge_requests(&s->qdev); |
465 | f8b6d672 | Bernhard Kohl | } |
466 | f8b6d672 | Bernhard Kohl | |
467 | f8b6d672 | Bernhard Kohl | static void scsi_destroy(SCSIDevice *d) |
468 | f8b6d672 | Bernhard Kohl | { |
469 | f8b6d672 | Bernhard Kohl | SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev, d); |
470 | f8b6d672 | Bernhard Kohl | |
471 | c557e889 | Paolo Bonzini | scsi_device_purge_requests(&s->qdev); |
472 | f8b6cc00 | Markus Armbruster | blockdev_mark_auto_del(s->qdev.conf.bs); |
473 | 2cc977e2 | ths | } |
474 | 2cc977e2 | ths | |
475 | d52affa7 | Gerd Hoffmann | static int scsi_generic_initfn(SCSIDevice *dev) |
476 | 2cc977e2 | ths | { |
477 | d52affa7 | Gerd Hoffmann | SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev, dev); |
478 | 2cc977e2 | ths | int sg_version;
|
479 | 2cc977e2 | ths | struct sg_scsi_id scsiid;
|
480 | 2cc977e2 | ths | |
481 | f8b6cc00 | Markus Armbruster | if (!s->qdev.conf.bs) {
|
482 | 1ecda02b | Markus Armbruster | error_report("scsi-generic: drive property not set");
|
483 | d52affa7 | Gerd Hoffmann | return -1; |
484 | d52affa7 | Gerd Hoffmann | } |
485 | f8b6cc00 | Markus Armbruster | s->bs = s->qdev.conf.bs; |
486 | 2cc977e2 | ths | |
487 | d52affa7 | Gerd Hoffmann | /* check we are really using a /dev/sg* file */
|
488 | 428c149b | Christoph Hellwig | if (!bdrv_is_sg(s->bs)) {
|
489 | 1ecda02b | Markus Armbruster | error_report("scsi-generic: not /dev/sg*");
|
490 | d52affa7 | Gerd Hoffmann | return -1; |
491 | d52affa7 | Gerd Hoffmann | } |
492 | 2cc977e2 | ths | |
493 | 620f862e | Markus Armbruster | if (bdrv_get_on_error(s->bs, 0) != BLOCK_ERR_STOP_ENOSPC) { |
494 | 620f862e | Markus Armbruster | error_report("Device doesn't support drive option werror");
|
495 | 620f862e | Markus Armbruster | return -1; |
496 | 620f862e | Markus Armbruster | } |
497 | 620f862e | Markus Armbruster | if (bdrv_get_on_error(s->bs, 1) != BLOCK_ERR_REPORT) { |
498 | 620f862e | Markus Armbruster | error_report("Device doesn't support drive option rerror");
|
499 | 620f862e | Markus Armbruster | return -1; |
500 | 620f862e | Markus Armbruster | } |
501 | 620f862e | Markus Armbruster | |
502 | 2cc977e2 | ths | /* check we are using a driver managing SG_IO (version 3 and after */
|
503 | 428c149b | Christoph Hellwig | if (bdrv_ioctl(s->bs, SG_GET_VERSION_NUM, &sg_version) < 0 || |
504 | d52affa7 | Gerd Hoffmann | sg_version < 30000) {
|
505 | 1ecda02b | Markus Armbruster | error_report("scsi-generic: scsi generic interface too old");
|
506 | d52affa7 | Gerd Hoffmann | return -1; |
507 | d52affa7 | Gerd Hoffmann | } |
508 | 2cc977e2 | ths | |
509 | 2cc977e2 | ths | /* get LUN of the /dev/sg? */
|
510 | 428c149b | Christoph Hellwig | if (bdrv_ioctl(s->bs, SG_GET_SCSI_ID, &scsiid)) {
|
511 | 1ecda02b | Markus Armbruster | error_report("scsi-generic: SG_GET_SCSI_ID ioctl failed");
|
512 | d52affa7 | Gerd Hoffmann | return -1; |
513 | d52affa7 | Gerd Hoffmann | } |
514 | 2cc977e2 | ths | |
515 | 2cc977e2 | ths | /* define device state */
|
516 | 2cc977e2 | ths | s->lun = scsiid.lun; |
517 | 89c0f643 | aurel32 | DPRINTF("LUN %d\n", s->lun);
|
518 | 91376656 | Gerd Hoffmann | s->qdev.type = scsiid.scsi_type; |
519 | 91376656 | Gerd Hoffmann | DPRINTF("device type %d\n", s->qdev.type);
|
520 | 91376656 | Gerd Hoffmann | if (s->qdev.type == TYPE_TAPE) {
|
521 | 428c149b | Christoph Hellwig | s->qdev.blocksize = get_stream_blocksize(s->bs); |
522 | b07995e3 | Gerd Hoffmann | if (s->qdev.blocksize == -1) |
523 | b07995e3 | Gerd Hoffmann | s->qdev.blocksize = 0;
|
524 | 89c0f643 | aurel32 | } else {
|
525 | 428c149b | Christoph Hellwig | s->qdev.blocksize = get_blocksize(s->bs); |
526 | 89c0f643 | aurel32 | /* removable media returns 0 if not present */
|
527 | b07995e3 | Gerd Hoffmann | if (s->qdev.blocksize <= 0) { |
528 | 91376656 | Gerd Hoffmann | if (s->qdev.type == TYPE_ROM || s->qdev.type == TYPE_WORM)
|
529 | b07995e3 | Gerd Hoffmann | s->qdev.blocksize = 2048;
|
530 | 89c0f643 | aurel32 | else
|
531 | b07995e3 | Gerd Hoffmann | s->qdev.blocksize = 512;
|
532 | 89c0f643 | aurel32 | } |
533 | 89c0f643 | aurel32 | } |
534 | b07995e3 | Gerd Hoffmann | DPRINTF("block size %d\n", s->qdev.blocksize);
|
535 | 2cc977e2 | ths | s->driver_status = 0;
|
536 | 2cc977e2 | ths | memset(s->sensebuf, 0, sizeof(s->sensebuf)); |
537 | 7d0d6950 | Markus Armbruster | bdrv_set_removable(s->bs, 0);
|
538 | d52affa7 | Gerd Hoffmann | return 0; |
539 | d52affa7 | Gerd Hoffmann | } |
540 | 2cc977e2 | ths | |
541 | d52affa7 | Gerd Hoffmann | static SCSIDeviceInfo scsi_generic_info = {
|
542 | d52affa7 | Gerd Hoffmann | .qdev.name = "scsi-generic",
|
543 | d52affa7 | Gerd Hoffmann | .qdev.desc = "pass through generic scsi device (/dev/sg*)",
|
544 | d52affa7 | Gerd Hoffmann | .qdev.size = sizeof(SCSIGenericState),
|
545 | f8b6d672 | Bernhard Kohl | .qdev.reset = scsi_generic_reset, |
546 | d52affa7 | Gerd Hoffmann | .init = scsi_generic_initfn, |
547 | d52affa7 | Gerd Hoffmann | .destroy = scsi_destroy, |
548 | 5c6c0e51 | Hannes Reinecke | .alloc_req = scsi_new_request, |
549 | ad2d30f7 | Paolo Bonzini | .free_req = scsi_free_request, |
550 | d52affa7 | Gerd Hoffmann | .send_command = scsi_send_command, |
551 | d52affa7 | Gerd Hoffmann | .read_data = scsi_read_data, |
552 | d52affa7 | Gerd Hoffmann | .write_data = scsi_write_data, |
553 | d52affa7 | Gerd Hoffmann | .cancel_io = scsi_cancel_io, |
554 | d52affa7 | Gerd Hoffmann | .get_buf = scsi_get_buf, |
555 | 74382217 | Hannes Reinecke | .get_sense = scsi_get_sense, |
556 | d52affa7 | Gerd Hoffmann | .qdev.props = (Property[]) { |
557 | 428c149b | Christoph Hellwig | DEFINE_BLOCK_PROPERTIES(SCSIGenericState, qdev.conf), |
558 | d52affa7 | Gerd Hoffmann | DEFINE_PROP_END_OF_LIST(), |
559 | d52affa7 | Gerd Hoffmann | }, |
560 | d52affa7 | Gerd Hoffmann | }; |
561 | 2cc977e2 | ths | |
562 | d52affa7 | Gerd Hoffmann | static void scsi_generic_register_devices(void) |
563 | d52affa7 | Gerd Hoffmann | { |
564 | d52affa7 | Gerd Hoffmann | scsi_qdev_register(&scsi_generic_info); |
565 | 2cc977e2 | ths | } |
566 | d52affa7 | Gerd Hoffmann | device_init(scsi_generic_register_devices) |
567 | d52affa7 | Gerd Hoffmann | |
568 | 2cc977e2 | ths | #endif /* __linux__ */ |