root / hw / scsi-generic.c @ 40f16dd1
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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 | 89b08ae1 | Gerd Hoffmann | static SCSIGenericReq *scsi_new_request(SCSIDevice *d, uint32_t tag, uint32_t lun)
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70 | 2cc977e2 | ths | { |
71 | 89b08ae1 | Gerd Hoffmann | SCSIRequest *req; |
72 | 2cc977e2 | ths | |
73 | 89b08ae1 | Gerd Hoffmann | req = scsi_req_alloc(sizeof(SCSIGenericReq), d, tag, lun);
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74 | 89b08ae1 | Gerd Hoffmann | return DO_UPCAST(SCSIGenericReq, req, req);
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75 | 2cc977e2 | ths | } |
76 | 2cc977e2 | ths | |
77 | 4c41d2ef | Gerd Hoffmann | static void scsi_remove_request(SCSIGenericReq *r) |
78 | 2cc977e2 | ths | { |
79 | 9af99d98 | Gerd Hoffmann | qemu_free(r->buf); |
80 | 89b08ae1 | Gerd Hoffmann | scsi_req_free(&r->req); |
81 | 2cc977e2 | ths | } |
82 | 2cc977e2 | ths | |
83 | 4c41d2ef | Gerd Hoffmann | static SCSIGenericReq *scsi_find_request(SCSIGenericState *s, uint32_t tag)
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84 | 2cc977e2 | ths | { |
85 | 89b08ae1 | Gerd Hoffmann | return DO_UPCAST(SCSIGenericReq, req, scsi_req_find(&s->qdev, tag));
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86 | 2cc977e2 | ths | } |
87 | 2cc977e2 | ths | |
88 | 2cc977e2 | ths | /* Helper function for command completion. */
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89 | 2cc977e2 | ths | static void scsi_command_complete(void *opaque, int ret) |
90 | 2cc977e2 | ths | { |
91 | 4c41d2ef | Gerd Hoffmann | SCSIGenericReq *r = (SCSIGenericReq *)opaque; |
92 | 4c41d2ef | Gerd Hoffmann | SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev, r->req.dev); |
93 | 2cc977e2 | ths | |
94 | 2cc977e2 | ths | s->driver_status = r->io_header.driver_status; |
95 | 89c0f643 | aurel32 | if (s->driver_status & SG_ERR_DRIVER_SENSE)
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96 | 89c0f643 | aurel32 | s->senselen = r->io_header.sb_len_wr; |
97 | 89c0f643 | aurel32 | |
98 | 2cc977e2 | ths | if (ret != 0) |
99 | f0171327 | Hannes Reinecke | r->req.status = BUSY; |
100 | 2cc977e2 | ths | else {
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101 | 2cc977e2 | ths | if (s->driver_status & SG_ERR_DRIVER_TIMEOUT) {
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102 | f0171327 | Hannes Reinecke | r->req.status = BUSY; |
103 | 2cc977e2 | ths | BADF("Driver Timeout\n");
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104 | 89c0f643 | aurel32 | } else if (r->io_header.status) |
105 | ed3a34a3 | Gerd Hoffmann | r->req.status = r->io_header.status; |
106 | 89c0f643 | aurel32 | else if (s->driver_status & SG_ERR_DRIVER_SENSE) |
107 | f0171327 | Hannes Reinecke | r->req.status = CHECK_CONDITION; |
108 | 2cc977e2 | ths | else
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109 | f0171327 | Hannes Reinecke | r->req.status = GOOD; |
110 | 2cc977e2 | ths | } |
111 | 89c0f643 | aurel32 | DPRINTF("Command complete 0x%p tag=0x%x status=%d\n",
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112 | ed3a34a3 | Gerd Hoffmann | r, r->req.tag, r->req.status); |
113 | ed3a34a3 | Gerd Hoffmann | |
114 | ed3a34a3 | Gerd Hoffmann | scsi_req_complete(&r->req); |
115 | 89b08ae1 | Gerd Hoffmann | scsi_remove_request(r); |
116 | 2cc977e2 | ths | } |
117 | 2cc977e2 | ths | |
118 | 2cc977e2 | ths | /* Cancel a pending data transfer. */
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119 | 2cc977e2 | ths | static void scsi_cancel_io(SCSIDevice *d, uint32_t tag) |
120 | 2cc977e2 | ths | { |
121 | 2cc977e2 | ths | DPRINTF("scsi_cancel_io 0x%x\n", tag);
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122 | d52affa7 | Gerd Hoffmann | SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev, d); |
123 | 4c41d2ef | Gerd Hoffmann | SCSIGenericReq *r; |
124 | 2cc977e2 | ths | DPRINTF("Cancel tag=0x%x\n", tag);
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125 | 2cc977e2 | ths | r = scsi_find_request(s, tag); |
126 | 2cc977e2 | ths | if (r) {
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127 | 4c41d2ef | Gerd Hoffmann | if (r->req.aiocb)
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128 | 4c41d2ef | Gerd Hoffmann | bdrv_aio_cancel(r->req.aiocb); |
129 | 4c41d2ef | Gerd Hoffmann | r->req.aiocb = NULL;
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130 | 2cc977e2 | ths | scsi_remove_request(r); |
131 | 2cc977e2 | ths | } |
132 | 2cc977e2 | ths | } |
133 | 2cc977e2 | ths | |
134 | 2cc977e2 | ths | static int execute_command(BlockDriverState *bdrv, |
135 | 4c41d2ef | Gerd Hoffmann | SCSIGenericReq *r, int direction,
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136 | 2cc977e2 | ths | BlockDriverCompletionFunc *complete) |
137 | 2cc977e2 | ths | { |
138 | 4c41d2ef | Gerd Hoffmann | SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev, r->req.dev); |
139 | 4c41d2ef | Gerd Hoffmann | |
140 | 2cc977e2 | ths | r->io_header.interface_id = 'S';
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141 | 2cc977e2 | ths | r->io_header.dxfer_direction = direction; |
142 | 2cc977e2 | ths | r->io_header.dxferp = r->buf; |
143 | 2cc977e2 | ths | r->io_header.dxfer_len = r->buflen; |
144 | 29362ebe | Gerd Hoffmann | r->io_header.cmdp = r->req.cmd.buf; |
145 | 29362ebe | Gerd Hoffmann | r->io_header.cmd_len = r->req.cmd.len; |
146 | 4c41d2ef | Gerd Hoffmann | r->io_header.mx_sb_len = sizeof(s->sensebuf);
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147 | 4c41d2ef | Gerd Hoffmann | r->io_header.sbp = s->sensebuf; |
148 | 2cc977e2 | ths | r->io_header.timeout = MAX_UINT; |
149 | 2cc977e2 | ths | r->io_header.usr_ptr = r; |
150 | 2cc977e2 | ths | r->io_header.flags |= SG_FLAG_DIRECT_IO; |
151 | 2cc977e2 | ths | |
152 | 4c41d2ef | Gerd Hoffmann | r->req.aiocb = bdrv_aio_ioctl(bdrv, SG_IO, &r->io_header, complete, r); |
153 | 4c41d2ef | Gerd Hoffmann | if (r->req.aiocb == NULL) { |
154 | 2cc977e2 | ths | BADF("execute_command: read failed !\n");
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155 | 2cc977e2 | ths | return -1; |
156 | 2cc977e2 | ths | } |
157 | 2cc977e2 | ths | |
158 | 2cc977e2 | ths | return 0; |
159 | 2cc977e2 | ths | } |
160 | 2cc977e2 | ths | |
161 | 2cc977e2 | ths | static void scsi_read_complete(void * opaque, int ret) |
162 | 2cc977e2 | ths | { |
163 | 4c41d2ef | Gerd Hoffmann | SCSIGenericReq *r = (SCSIGenericReq *)opaque; |
164 | 2cc977e2 | ths | int len;
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165 | 2cc977e2 | ths | |
166 | 2cc977e2 | ths | if (ret) {
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167 | aa2b1e89 | Bernhard Kohl | DPRINTF("IO error ret %d\n", ret);
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168 | 2cc977e2 | ths | scsi_command_complete(r, ret); |
169 | 2cc977e2 | ths | return;
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170 | 2cc977e2 | ths | } |
171 | 2cc977e2 | ths | len = r->io_header.dxfer_len - r->io_header.resid; |
172 | 4c41d2ef | Gerd Hoffmann | DPRINTF("Data ready tag=0x%x len=%d\n", r->req.tag, len);
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173 | 2cc977e2 | ths | |
174 | 2cc977e2 | ths | r->len = -1;
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175 | 40f16dd1 | Paolo Bonzini | if (len == 0) { |
176 | 89c0f643 | aurel32 | scsi_command_complete(r, 0);
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177 | 40f16dd1 | Paolo Bonzini | } else {
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178 | 40f16dd1 | Paolo Bonzini | r->req.bus->complete(r->req.bus, SCSI_REASON_DATA, r->req.tag, len); |
179 | 40f16dd1 | Paolo Bonzini | } |
180 | 2cc977e2 | ths | } |
181 | 2cc977e2 | ths | |
182 | 2cc977e2 | ths | /* Read more data from scsi device into buffer. */
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183 | 2cc977e2 | ths | static void scsi_read_data(SCSIDevice *d, uint32_t tag) |
184 | 2cc977e2 | ths | { |
185 | d52affa7 | Gerd Hoffmann | SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev, d); |
186 | 4c41d2ef | Gerd Hoffmann | SCSIGenericReq *r; |
187 | 2cc977e2 | ths | int ret;
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188 | 2cc977e2 | ths | |
189 | 2cc977e2 | ths | DPRINTF("scsi_read_data 0x%x\n", tag);
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190 | 2cc977e2 | ths | r = scsi_find_request(s, tag); |
191 | 2cc977e2 | ths | if (!r) {
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192 | 2cc977e2 | ths | BADF("Bad read tag 0x%x\n", tag);
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193 | 2cc977e2 | ths | /* ??? This is the wrong error. */
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194 | 2cc977e2 | ths | scsi_command_complete(r, -EINVAL); |
195 | 2cc977e2 | ths | return;
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196 | 2cc977e2 | ths | } |
197 | 2cc977e2 | ths | |
198 | 2cc977e2 | ths | if (r->len == -1) { |
199 | 2cc977e2 | ths | scsi_command_complete(r, 0);
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200 | 2cc977e2 | ths | return;
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201 | 2cc977e2 | ths | } |
202 | 2cc977e2 | ths | |
203 | 29362ebe | Gerd Hoffmann | if (r->req.cmd.buf[0] == REQUEST_SENSE && s->driver_status & SG_ERR_DRIVER_SENSE) |
204 | 2cc977e2 | ths | { |
205 | 89c0f643 | aurel32 | s->senselen = MIN(r->len, s->senselen); |
206 | 89c0f643 | aurel32 | memcpy(r->buf, s->sensebuf, s->senselen); |
207 | 2cc977e2 | ths | r->io_header.driver_status = 0;
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208 | 89c0f643 | aurel32 | r->io_header.status = 0;
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209 | 89c0f643 | aurel32 | r->io_header.dxfer_len = s->senselen; |
210 | 2cc977e2 | ths | r->len = -1;
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211 | 4c41d2ef | Gerd Hoffmann | DPRINTF("Data ready tag=0x%x len=%d\n", r->req.tag, s->senselen);
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212 | a9dd6843 | aliguori | DPRINTF("Sense: %d %d %d %d %d %d %d %d\n",
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213 | a9dd6843 | aliguori | r->buf[0], r->buf[1], r->buf[2], r->buf[3], |
214 | a9dd6843 | aliguori | r->buf[4], r->buf[5], r->buf[6], r->buf[7]); |
215 | 4c41d2ef | Gerd Hoffmann | r->req.bus->complete(r->req.bus, SCSI_REASON_DATA, r->req.tag, s->senselen); |
216 | 2cc977e2 | ths | return;
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217 | 2cc977e2 | ths | } |
218 | 2cc977e2 | ths | |
219 | 428c149b | Christoph Hellwig | ret = execute_command(s->bs, r, SG_DXFER_FROM_DEV, scsi_read_complete); |
220 | 2cc977e2 | ths | if (ret == -1) { |
221 | 2cc977e2 | ths | scsi_command_complete(r, -EINVAL); |
222 | 2cc977e2 | ths | return;
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223 | 2cc977e2 | ths | } |
224 | 2cc977e2 | ths | } |
225 | 2cc977e2 | ths | |
226 | 2cc977e2 | ths | static void scsi_write_complete(void * opaque, int ret) |
227 | 2cc977e2 | ths | { |
228 | 4c41d2ef | Gerd Hoffmann | SCSIGenericReq *r = (SCSIGenericReq *)opaque; |
229 | 4c41d2ef | Gerd Hoffmann | SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev, r->req.dev); |
230 | 2cc977e2 | ths | |
231 | 2cc977e2 | ths | DPRINTF("scsi_write_complete() ret = %d\n", ret);
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232 | 2cc977e2 | ths | if (ret) {
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233 | 2cc977e2 | ths | DPRINTF("IO error\n");
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234 | 2cc977e2 | ths | scsi_command_complete(r, ret); |
235 | 2cc977e2 | ths | return;
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236 | 2cc977e2 | ths | } |
237 | 2cc977e2 | ths | |
238 | 29362ebe | Gerd Hoffmann | if (r->req.cmd.buf[0] == MODE_SELECT && r->req.cmd.buf[4] == 12 && |
239 | 91376656 | Gerd Hoffmann | s->qdev.type == TYPE_TAPE) { |
240 | b07995e3 | Gerd Hoffmann | s->qdev.blocksize = (r->buf[9] << 16) | (r->buf[10] << 8) | r->buf[11]; |
241 | aa2b1e89 | Bernhard Kohl | DPRINTF("block size %d\n", s->qdev.blocksize);
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242 | 89c0f643 | aurel32 | } |
243 | 89c0f643 | aurel32 | |
244 | 2cc977e2 | ths | scsi_command_complete(r, ret); |
245 | 2cc977e2 | ths | } |
246 | 2cc977e2 | ths | |
247 | 2cc977e2 | ths | /* Write data to a scsi device. Returns nonzero on failure.
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248 | 2cc977e2 | ths | The transfer may complete asynchronously. */
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249 | 2cc977e2 | ths | static int scsi_write_data(SCSIDevice *d, uint32_t tag) |
250 | 2cc977e2 | ths | { |
251 | d52affa7 | Gerd Hoffmann | SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev, d); |
252 | 4c41d2ef | Gerd Hoffmann | SCSIGenericReq *r; |
253 | 2cc977e2 | ths | int ret;
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254 | 2cc977e2 | ths | |
255 | 2cc977e2 | ths | DPRINTF("scsi_write_data 0x%x\n", tag);
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256 | 2cc977e2 | ths | r = scsi_find_request(s, tag); |
257 | 2cc977e2 | ths | if (!r) {
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258 | 2cc977e2 | ths | BADF("Bad write tag 0x%x\n", tag);
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259 | 2cc977e2 | ths | /* ??? This is the wrong error. */
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260 | 2cc977e2 | ths | scsi_command_complete(r, -EINVAL); |
261 | 2cc977e2 | ths | return 0; |
262 | 2cc977e2 | ths | } |
263 | 2cc977e2 | ths | |
264 | 2cc977e2 | ths | if (r->len == 0) { |
265 | 2cc977e2 | ths | r->len = r->buflen; |
266 | 4c41d2ef | Gerd Hoffmann | r->req.bus->complete(r->req.bus, SCSI_REASON_DATA, r->req.tag, r->len); |
267 | 2cc977e2 | ths | return 0; |
268 | 2cc977e2 | ths | } |
269 | 2cc977e2 | ths | |
270 | 428c149b | Christoph Hellwig | ret = execute_command(s->bs, r, SG_DXFER_TO_DEV, scsi_write_complete); |
271 | 2cc977e2 | ths | if (ret == -1) { |
272 | 2cc977e2 | ths | scsi_command_complete(r, -EINVAL); |
273 | 2cc977e2 | ths | return 1; |
274 | 2cc977e2 | ths | } |
275 | 2cc977e2 | ths | |
276 | 2cc977e2 | ths | return 0; |
277 | 2cc977e2 | ths | } |
278 | 2cc977e2 | ths | |
279 | 2cc977e2 | ths | /* Return a pointer to the data buffer. */
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280 | 2cc977e2 | ths | static uint8_t *scsi_get_buf(SCSIDevice *d, uint32_t tag)
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281 | 2cc977e2 | ths | { |
282 | d52affa7 | Gerd Hoffmann | SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev, d); |
283 | 4c41d2ef | Gerd Hoffmann | SCSIGenericReq *r; |
284 | 2cc977e2 | ths | r = scsi_find_request(s, tag); |
285 | 2cc977e2 | ths | if (!r) {
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286 | 2cc977e2 | ths | BADF("Bad buffer tag 0x%x\n", tag);
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287 | 2cc977e2 | ths | return NULL; |
288 | 2cc977e2 | ths | } |
289 | 2cc977e2 | ths | return r->buf;
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290 | 2cc977e2 | ths | } |
291 | 2cc977e2 | ths | |
292 | 2ec749cb | Gerd Hoffmann | static void scsi_req_fixup(SCSIRequest *req) |
293 | 2cc977e2 | ths | { |
294 | 2ec749cb | Gerd Hoffmann | switch(req->cmd.buf[0]) { |
295 | 2cc977e2 | ths | case WRITE_10:
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296 | 2ec749cb | Gerd Hoffmann | req->cmd.buf[1] &= ~0x08; /* disable FUA */ |
297 | 2cc977e2 | ths | break;
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298 | 2cc977e2 | ths | case READ_10:
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299 | 2ec749cb | Gerd Hoffmann | req->cmd.buf[1] &= ~0x08; /* disable FUA */ |
300 | a9dd6843 | aliguori | break;
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301 | a9dd6843 | aliguori | case REWIND:
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302 | a9dd6843 | aliguori | case START_STOP:
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303 | 2ec749cb | Gerd Hoffmann | if (req->dev->type == TYPE_TAPE) {
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304 | 2ec749cb | Gerd Hoffmann | /* force IMMED, otherwise qemu waits end of command */
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305 | 2ec749cb | Gerd Hoffmann | req->cmd.buf[1] = 0x01; |
306 | 2ec749cb | Gerd Hoffmann | } |
307 | a9dd6843 | aliguori | break;
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308 | a9dd6843 | aliguori | } |
309 | a9dd6843 | aliguori | } |
310 | a9dd6843 | aliguori | |
311 | 2cc977e2 | ths | /* Execute a scsi command. Returns the length of the data expected by the
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312 | 2cc977e2 | ths | command. This will be Positive for data transfers from the device
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313 | 2cc977e2 | ths | (eg. disk reads), negative for transfers to the device (eg. disk writes),
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314 | 2cc977e2 | ths | and zero if the command does not transfer any data. */
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315 | 2cc977e2 | ths | |
316 | 2cc977e2 | ths | static int32_t scsi_send_command(SCSIDevice *d, uint32_t tag,
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317 | 2cc977e2 | ths | uint8_t *cmd, int lun)
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318 | 2cc977e2 | ths | { |
319 | d52affa7 | Gerd Hoffmann | SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev, d); |
320 | 4c41d2ef | Gerd Hoffmann | SCSIGenericReq *r; |
321 | d52affa7 | Gerd Hoffmann | SCSIBus *bus; |
322 | 2cc977e2 | ths | int ret;
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323 | 2cc977e2 | ths | |
324 | 89c0f643 | aurel32 | if (cmd[0] != REQUEST_SENSE && |
325 | 89c0f643 | aurel32 | (lun != s->lun || (cmd[1] >> 5) != s->lun)) { |
326 | 89c0f643 | aurel32 | DPRINTF("Unimplemented LUN %d\n", lun ? lun : cmd[1] >> 5); |
327 | 89c0f643 | aurel32 | |
328 | 89c0f643 | aurel32 | s->sensebuf[0] = 0x70; |
329 | 89c0f643 | aurel32 | s->sensebuf[1] = 0x00; |
330 | 89c0f643 | aurel32 | s->sensebuf[2] = ILLEGAL_REQUEST;
|
331 | 89c0f643 | aurel32 | s->sensebuf[3] = 0x00; |
332 | 89c0f643 | aurel32 | s->sensebuf[4] = 0x00; |
333 | 89c0f643 | aurel32 | s->sensebuf[5] = 0x00; |
334 | 89c0f643 | aurel32 | s->sensebuf[6] = 0x00; |
335 | 89c0f643 | aurel32 | s->senselen = 7;
|
336 | 89c0f643 | aurel32 | s->driver_status = SG_ERR_DRIVER_SENSE; |
337 | d52affa7 | Gerd Hoffmann | bus = scsi_bus_from_device(d); |
338 | f0171327 | Hannes Reinecke | bus->complete(bus, SCSI_REASON_DONE, tag, CHECK_CONDITION); |
339 | 89c0f643 | aurel32 | return 0; |
340 | 89c0f643 | aurel32 | } |
341 | 89c0f643 | aurel32 | |
342 | 2cc977e2 | ths | r = scsi_find_request(s, tag); |
343 | 2cc977e2 | ths | if (r) {
|
344 | 2cc977e2 | ths | BADF("Tag 0x%x already in use %p\n", tag, r);
|
345 | 2cc977e2 | ths | scsi_cancel_io(d, tag); |
346 | 2cc977e2 | ths | } |
347 | 89b08ae1 | Gerd Hoffmann | r = scsi_new_request(d, tag, lun); |
348 | 2cc977e2 | ths | |
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 | 2ec749cb | Gerd Hoffmann | scsi_remove_request(r); |
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 | 2cc977e2 | ths | if (ret == -1) { |
376 | 2cc977e2 | ths | scsi_command_complete(r, -EINVAL); |
377 | 2cc977e2 | ths | 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 | 2ec749cb | Gerd Hoffmann | return -r->req.cmd.xfer;
|
394 | 2cc977e2 | ths | } |
395 | 2cc977e2 | ths | |
396 | 2ec749cb | Gerd Hoffmann | return r->req.cmd.xfer;
|
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_purge_requests(SCSIGenericState *s) |
461 | 2cc977e2 | ths | { |
462 | 9af99d98 | Gerd Hoffmann | SCSIGenericReq *r; |
463 | 2cc977e2 | ths | |
464 | 9af99d98 | Gerd Hoffmann | while (!QTAILQ_EMPTY(&s->qdev.requests)) {
|
465 | 9af99d98 | Gerd Hoffmann | r = DO_UPCAST(SCSIGenericReq, req, QTAILQ_FIRST(&s->qdev.requests)); |
466 | f8b6d672 | Bernhard Kohl | if (r->req.aiocb) {
|
467 | f8b6d672 | Bernhard Kohl | bdrv_aio_cancel(r->req.aiocb); |
468 | f8b6d672 | Bernhard Kohl | } |
469 | 9af99d98 | Gerd Hoffmann | scsi_remove_request(r); |
470 | 2cc977e2 | ths | } |
471 | f8b6d672 | Bernhard Kohl | } |
472 | f8b6d672 | Bernhard Kohl | |
473 | f8b6d672 | Bernhard Kohl | static void scsi_generic_reset(DeviceState *dev) |
474 | f8b6d672 | Bernhard Kohl | { |
475 | f8b6d672 | Bernhard Kohl | SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev.qdev, dev); |
476 | f8b6d672 | Bernhard Kohl | |
477 | f8b6d672 | Bernhard Kohl | scsi_generic_purge_requests(s); |
478 | f8b6d672 | Bernhard Kohl | } |
479 | f8b6d672 | Bernhard Kohl | |
480 | f8b6d672 | Bernhard Kohl | static void scsi_destroy(SCSIDevice *d) |
481 | f8b6d672 | Bernhard Kohl | { |
482 | f8b6d672 | Bernhard Kohl | SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev, d); |
483 | f8b6d672 | Bernhard Kohl | |
484 | f8b6d672 | Bernhard Kohl | scsi_generic_purge_requests(s); |
485 | f8b6cc00 | Markus Armbruster | blockdev_mark_auto_del(s->qdev.conf.bs); |
486 | 2cc977e2 | ths | } |
487 | 2cc977e2 | ths | |
488 | d52affa7 | Gerd Hoffmann | static int scsi_generic_initfn(SCSIDevice *dev) |
489 | 2cc977e2 | ths | { |
490 | d52affa7 | Gerd Hoffmann | SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev, dev); |
491 | 2cc977e2 | ths | int sg_version;
|
492 | 2cc977e2 | ths | struct sg_scsi_id scsiid;
|
493 | 2cc977e2 | ths | |
494 | f8b6cc00 | Markus Armbruster | if (!s->qdev.conf.bs) {
|
495 | 1ecda02b | Markus Armbruster | error_report("scsi-generic: drive property not set");
|
496 | d52affa7 | Gerd Hoffmann | return -1; |
497 | d52affa7 | Gerd Hoffmann | } |
498 | f8b6cc00 | Markus Armbruster | s->bs = s->qdev.conf.bs; |
499 | 2cc977e2 | ths | |
500 | d52affa7 | Gerd Hoffmann | /* check we are really using a /dev/sg* file */
|
501 | 428c149b | Christoph Hellwig | if (!bdrv_is_sg(s->bs)) {
|
502 | 1ecda02b | Markus Armbruster | error_report("scsi-generic: not /dev/sg*");
|
503 | d52affa7 | Gerd Hoffmann | return -1; |
504 | d52affa7 | Gerd Hoffmann | } |
505 | 2cc977e2 | ths | |
506 | 620f862e | Markus Armbruster | if (bdrv_get_on_error(s->bs, 0) != BLOCK_ERR_STOP_ENOSPC) { |
507 | 620f862e | Markus Armbruster | error_report("Device doesn't support drive option werror");
|
508 | 620f862e | Markus Armbruster | return -1; |
509 | 620f862e | Markus Armbruster | } |
510 | 620f862e | Markus Armbruster | if (bdrv_get_on_error(s->bs, 1) != BLOCK_ERR_REPORT) { |
511 | 620f862e | Markus Armbruster | error_report("Device doesn't support drive option rerror");
|
512 | 620f862e | Markus Armbruster | return -1; |
513 | 620f862e | Markus Armbruster | } |
514 | 620f862e | Markus Armbruster | |
515 | 2cc977e2 | ths | /* check we are using a driver managing SG_IO (version 3 and after */
|
516 | 428c149b | Christoph Hellwig | if (bdrv_ioctl(s->bs, SG_GET_VERSION_NUM, &sg_version) < 0 || |
517 | d52affa7 | Gerd Hoffmann | sg_version < 30000) {
|
518 | 1ecda02b | Markus Armbruster | error_report("scsi-generic: scsi generic interface too old");
|
519 | d52affa7 | Gerd Hoffmann | return -1; |
520 | d52affa7 | Gerd Hoffmann | } |
521 | 2cc977e2 | ths | |
522 | 2cc977e2 | ths | /* get LUN of the /dev/sg? */
|
523 | 428c149b | Christoph Hellwig | if (bdrv_ioctl(s->bs, SG_GET_SCSI_ID, &scsiid)) {
|
524 | 1ecda02b | Markus Armbruster | error_report("scsi-generic: SG_GET_SCSI_ID ioctl failed");
|
525 | d52affa7 | Gerd Hoffmann | return -1; |
526 | d52affa7 | Gerd Hoffmann | } |
527 | 2cc977e2 | ths | |
528 | 2cc977e2 | ths | /* define device state */
|
529 | 2cc977e2 | ths | s->lun = scsiid.lun; |
530 | 89c0f643 | aurel32 | DPRINTF("LUN %d\n", s->lun);
|
531 | 91376656 | Gerd Hoffmann | s->qdev.type = scsiid.scsi_type; |
532 | 91376656 | Gerd Hoffmann | DPRINTF("device type %d\n", s->qdev.type);
|
533 | 91376656 | Gerd Hoffmann | if (s->qdev.type == TYPE_TAPE) {
|
534 | 428c149b | Christoph Hellwig | s->qdev.blocksize = get_stream_blocksize(s->bs); |
535 | b07995e3 | Gerd Hoffmann | if (s->qdev.blocksize == -1) |
536 | b07995e3 | Gerd Hoffmann | s->qdev.blocksize = 0;
|
537 | 89c0f643 | aurel32 | } else {
|
538 | 428c149b | Christoph Hellwig | s->qdev.blocksize = get_blocksize(s->bs); |
539 | 89c0f643 | aurel32 | /* removable media returns 0 if not present */
|
540 | b07995e3 | Gerd Hoffmann | if (s->qdev.blocksize <= 0) { |
541 | 91376656 | Gerd Hoffmann | if (s->qdev.type == TYPE_ROM || s->qdev.type == TYPE_WORM)
|
542 | b07995e3 | Gerd Hoffmann | s->qdev.blocksize = 2048;
|
543 | 89c0f643 | aurel32 | else
|
544 | b07995e3 | Gerd Hoffmann | s->qdev.blocksize = 512;
|
545 | 89c0f643 | aurel32 | } |
546 | 89c0f643 | aurel32 | } |
547 | b07995e3 | Gerd Hoffmann | DPRINTF("block size %d\n", s->qdev.blocksize);
|
548 | 2cc977e2 | ths | s->driver_status = 0;
|
549 | 2cc977e2 | ths | memset(s->sensebuf, 0, sizeof(s->sensebuf)); |
550 | 7d0d6950 | Markus Armbruster | bdrv_set_removable(s->bs, 0);
|
551 | d52affa7 | Gerd Hoffmann | return 0; |
552 | d52affa7 | Gerd Hoffmann | } |
553 | 2cc977e2 | ths | |
554 | d52affa7 | Gerd Hoffmann | static SCSIDeviceInfo scsi_generic_info = {
|
555 | d52affa7 | Gerd Hoffmann | .qdev.name = "scsi-generic",
|
556 | d52affa7 | Gerd Hoffmann | .qdev.desc = "pass through generic scsi device (/dev/sg*)",
|
557 | d52affa7 | Gerd Hoffmann | .qdev.size = sizeof(SCSIGenericState),
|
558 | f8b6d672 | Bernhard Kohl | .qdev.reset = scsi_generic_reset, |
559 | d52affa7 | Gerd Hoffmann | .init = scsi_generic_initfn, |
560 | d52affa7 | Gerd Hoffmann | .destroy = scsi_destroy, |
561 | d52affa7 | Gerd Hoffmann | .send_command = scsi_send_command, |
562 | d52affa7 | Gerd Hoffmann | .read_data = scsi_read_data, |
563 | d52affa7 | Gerd Hoffmann | .write_data = scsi_write_data, |
564 | d52affa7 | Gerd Hoffmann | .cancel_io = scsi_cancel_io, |
565 | d52affa7 | Gerd Hoffmann | .get_buf = scsi_get_buf, |
566 | d52affa7 | Gerd Hoffmann | .qdev.props = (Property[]) { |
567 | 428c149b | Christoph Hellwig | DEFINE_BLOCK_PROPERTIES(SCSIGenericState, qdev.conf), |
568 | d52affa7 | Gerd Hoffmann | DEFINE_PROP_END_OF_LIST(), |
569 | d52affa7 | Gerd Hoffmann | }, |
570 | d52affa7 | Gerd Hoffmann | }; |
571 | 2cc977e2 | ths | |
572 | d52affa7 | Gerd Hoffmann | static void scsi_generic_register_devices(void) |
573 | d52affa7 | Gerd Hoffmann | { |
574 | d52affa7 | Gerd Hoffmann | scsi_qdev_register(&scsi_generic_info); |
575 | 2cc977e2 | ths | } |
576 | d52affa7 | Gerd Hoffmann | device_init(scsi_generic_register_devices) |
577 | d52affa7 | Gerd Hoffmann | |
578 | 2cc977e2 | ths | #endif /* __linux__ */ |