root / hw / scsi-generic.c @ f2e17508
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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 | 2cc977e2 | ths | #include "block.h" |
16 | 43b443b6 | Gerd Hoffmann | #include "scsi.h" |
17 | 2cc977e2 | ths | |
18 | d52affa7 | Gerd Hoffmann | #ifdef __linux__
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19 | 2cc977e2 | ths | |
20 | 2cc977e2 | ths | //#define DEBUG_SCSI
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21 | 2cc977e2 | ths | |
22 | 2cc977e2 | ths | #ifdef DEBUG_SCSI
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23 | 001faf32 | Blue Swirl | #define DPRINTF(fmt, ...) \
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24 | 001faf32 | Blue Swirl | do { printf("scsi-generic: " fmt , ## __VA_ARGS__); } while (0) |
25 | 2cc977e2 | ths | #else
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26 | 001faf32 | Blue Swirl | #define DPRINTF(fmt, ...) do {} while(0) |
27 | 2cc977e2 | ths | #endif
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28 | 2cc977e2 | ths | |
29 | 001faf32 | Blue Swirl | #define BADF(fmt, ...) \
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30 | 001faf32 | Blue Swirl | do { fprintf(stderr, "scsi-generic: " fmt , ## __VA_ARGS__); } while (0) |
31 | 2cc977e2 | ths | |
32 | 2cc977e2 | ths | #include <stdio.h> |
33 | 2cc977e2 | ths | #include <sys/types.h> |
34 | 2cc977e2 | ths | #include <sys/stat.h> |
35 | 2cc977e2 | ths | #include <unistd.h> |
36 | 2cc977e2 | ths | #include <scsi/sg.h> |
37 | 0d65e1f8 | Gerd Hoffmann | #include "scsi-defs.h" |
38 | 2cc977e2 | ths | |
39 | a9dd6843 | aliguori | #define SCSI_SENSE_BUF_SIZE 96 |
40 | 2cc977e2 | ths | |
41 | 2cc977e2 | ths | #define SG_ERR_DRIVER_TIMEOUT 0x06 |
42 | 2cc977e2 | ths | #define SG_ERR_DRIVER_SENSE 0x08 |
43 | 2cc977e2 | ths | |
44 | 2cc977e2 | ths | #ifndef MAX_UINT
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45 | 2cc977e2 | ths | #define MAX_UINT ((unsigned int)-1) |
46 | 2cc977e2 | ths | #endif
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47 | 2cc977e2 | ths | |
48 | d52affa7 | Gerd Hoffmann | typedef struct SCSIGenericState SCSIGenericState; |
49 | d52affa7 | Gerd Hoffmann | |
50 | 4c41d2ef | Gerd Hoffmann | typedef struct SCSIGenericReq { |
51 | 4c41d2ef | Gerd Hoffmann | SCSIRequest req; |
52 | 2cc977e2 | ths | uint8_t *buf; |
53 | 2cc977e2 | ths | int buflen;
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54 | 2cc977e2 | ths | int len;
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55 | 2cc977e2 | ths | sg_io_hdr_t io_header; |
56 | 4c41d2ef | Gerd Hoffmann | } SCSIGenericReq; |
57 | 2cc977e2 | ths | |
58 | d52affa7 | Gerd Hoffmann | struct SCSIGenericState
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59 | 2cc977e2 | ths | { |
60 | d52affa7 | Gerd Hoffmann | SCSIDevice qdev; |
61 | 2cc977e2 | ths | int lun;
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62 | 2cc977e2 | ths | int driver_status;
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63 | 2cc977e2 | ths | uint8_t sensebuf[SCSI_SENSE_BUF_SIZE]; |
64 | 89c0f643 | aurel32 | uint8_t senselen; |
65 | 2cc977e2 | ths | }; |
66 | 2cc977e2 | ths | |
67 | 89b08ae1 | Gerd Hoffmann | static SCSIGenericReq *scsi_new_request(SCSIDevice *d, uint32_t tag, uint32_t lun)
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68 | 2cc977e2 | ths | { |
69 | 89b08ae1 | Gerd Hoffmann | SCSIRequest *req; |
70 | 2cc977e2 | ths | |
71 | 89b08ae1 | Gerd Hoffmann | req = scsi_req_alloc(sizeof(SCSIGenericReq), d, tag, lun);
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72 | 89b08ae1 | Gerd Hoffmann | return DO_UPCAST(SCSIGenericReq, req, req);
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73 | 2cc977e2 | ths | } |
74 | 2cc977e2 | ths | |
75 | 4c41d2ef | Gerd Hoffmann | static void scsi_remove_request(SCSIGenericReq *r) |
76 | 2cc977e2 | ths | { |
77 | 9af99d98 | Gerd Hoffmann | qemu_free(r->buf); |
78 | 89b08ae1 | Gerd Hoffmann | scsi_req_free(&r->req); |
79 | 2cc977e2 | ths | } |
80 | 2cc977e2 | ths | |
81 | 4c41d2ef | Gerd Hoffmann | static SCSIGenericReq *scsi_find_request(SCSIGenericState *s, uint32_t tag)
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82 | 2cc977e2 | ths | { |
83 | 89b08ae1 | Gerd Hoffmann | return DO_UPCAST(SCSIGenericReq, req, scsi_req_find(&s->qdev, tag));
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84 | 2cc977e2 | ths | } |
85 | 2cc977e2 | ths | |
86 | 2cc977e2 | ths | /* Helper function for command completion. */
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87 | 2cc977e2 | ths | static void scsi_command_complete(void *opaque, int ret) |
88 | 2cc977e2 | ths | { |
89 | 4c41d2ef | Gerd Hoffmann | SCSIGenericReq *r = (SCSIGenericReq *)opaque; |
90 | 4c41d2ef | Gerd Hoffmann | SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev, r->req.dev); |
91 | 2cc977e2 | ths | |
92 | 2cc977e2 | ths | s->driver_status = r->io_header.driver_status; |
93 | 89c0f643 | aurel32 | if (s->driver_status & SG_ERR_DRIVER_SENSE)
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94 | 89c0f643 | aurel32 | s->senselen = r->io_header.sb_len_wr; |
95 | 89c0f643 | aurel32 | |
96 | 2cc977e2 | ths | if (ret != 0) |
97 | ed3a34a3 | Gerd Hoffmann | r->req.status = BUSY << 1;
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98 | 2cc977e2 | ths | else {
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99 | 2cc977e2 | ths | if (s->driver_status & SG_ERR_DRIVER_TIMEOUT) {
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100 | ed3a34a3 | Gerd Hoffmann | r->req.status = BUSY << 1;
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101 | 2cc977e2 | ths | BADF("Driver Timeout\n");
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102 | 89c0f643 | aurel32 | } else if (r->io_header.status) |
103 | ed3a34a3 | Gerd Hoffmann | r->req.status = r->io_header.status; |
104 | 89c0f643 | aurel32 | else if (s->driver_status & SG_ERR_DRIVER_SENSE) |
105 | ed3a34a3 | Gerd Hoffmann | r->req.status = CHECK_CONDITION << 1;
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106 | 2cc977e2 | ths | else
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107 | ed3a34a3 | Gerd Hoffmann | r->req.status = GOOD << 1;
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108 | 2cc977e2 | ths | } |
109 | 89c0f643 | aurel32 | DPRINTF("Command complete 0x%p tag=0x%x status=%d\n",
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110 | ed3a34a3 | Gerd Hoffmann | r, r->req.tag, r->req.status); |
111 | ed3a34a3 | Gerd Hoffmann | |
112 | ed3a34a3 | Gerd Hoffmann | scsi_req_complete(&r->req); |
113 | 89b08ae1 | Gerd Hoffmann | scsi_remove_request(r); |
114 | 2cc977e2 | ths | } |
115 | 2cc977e2 | ths | |
116 | 2cc977e2 | ths | /* Cancel a pending data transfer. */
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117 | 2cc977e2 | ths | static void scsi_cancel_io(SCSIDevice *d, uint32_t tag) |
118 | 2cc977e2 | ths | { |
119 | 2cc977e2 | ths | DPRINTF("scsi_cancel_io 0x%x\n", tag);
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120 | d52affa7 | Gerd Hoffmann | SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev, d); |
121 | 4c41d2ef | Gerd Hoffmann | SCSIGenericReq *r; |
122 | 2cc977e2 | ths | DPRINTF("Cancel tag=0x%x\n", tag);
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123 | 2cc977e2 | ths | r = scsi_find_request(s, tag); |
124 | 2cc977e2 | ths | if (r) {
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125 | 4c41d2ef | Gerd Hoffmann | if (r->req.aiocb)
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126 | 4c41d2ef | Gerd Hoffmann | bdrv_aio_cancel(r->req.aiocb); |
127 | 4c41d2ef | Gerd Hoffmann | r->req.aiocb = NULL;
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128 | 2cc977e2 | ths | scsi_remove_request(r); |
129 | 2cc977e2 | ths | } |
130 | 2cc977e2 | ths | } |
131 | 2cc977e2 | ths | |
132 | 2cc977e2 | ths | static int execute_command(BlockDriverState *bdrv, |
133 | 4c41d2ef | Gerd Hoffmann | SCSIGenericReq *r, int direction,
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134 | 2cc977e2 | ths | BlockDriverCompletionFunc *complete) |
135 | 2cc977e2 | ths | { |
136 | 4c41d2ef | Gerd Hoffmann | SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev, r->req.dev); |
137 | 4c41d2ef | Gerd Hoffmann | |
138 | 2cc977e2 | ths | r->io_header.interface_id = 'S';
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139 | 2cc977e2 | ths | r->io_header.dxfer_direction = direction; |
140 | 2cc977e2 | ths | r->io_header.dxferp = r->buf; |
141 | 2cc977e2 | ths | r->io_header.dxfer_len = r->buflen; |
142 | 29362ebe | Gerd Hoffmann | r->io_header.cmdp = r->req.cmd.buf; |
143 | 29362ebe | Gerd Hoffmann | r->io_header.cmd_len = r->req.cmd.len; |
144 | 4c41d2ef | Gerd Hoffmann | r->io_header.mx_sb_len = sizeof(s->sensebuf);
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145 | 4c41d2ef | Gerd Hoffmann | r->io_header.sbp = s->sensebuf; |
146 | 2cc977e2 | ths | r->io_header.timeout = MAX_UINT; |
147 | 2cc977e2 | ths | r->io_header.usr_ptr = r; |
148 | 2cc977e2 | ths | r->io_header.flags |= SG_FLAG_DIRECT_IO; |
149 | 2cc977e2 | ths | |
150 | 4c41d2ef | Gerd Hoffmann | r->req.aiocb = bdrv_aio_ioctl(bdrv, SG_IO, &r->io_header, complete, r); |
151 | 4c41d2ef | Gerd Hoffmann | if (r->req.aiocb == NULL) { |
152 | 2cc977e2 | ths | BADF("execute_command: read failed !\n");
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153 | 2cc977e2 | ths | return -1; |
154 | 2cc977e2 | ths | } |
155 | 2cc977e2 | ths | |
156 | 2cc977e2 | ths | return 0; |
157 | 2cc977e2 | ths | } |
158 | 2cc977e2 | ths | |
159 | 2cc977e2 | ths | static void scsi_read_complete(void * opaque, int ret) |
160 | 2cc977e2 | ths | { |
161 | 4c41d2ef | Gerd Hoffmann | SCSIGenericReq *r = (SCSIGenericReq *)opaque; |
162 | 2cc977e2 | ths | int len;
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163 | 2cc977e2 | ths | |
164 | 2cc977e2 | ths | if (ret) {
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165 | 2cc977e2 | ths | DPRINTF("IO error\n");
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166 | 2cc977e2 | ths | scsi_command_complete(r, ret); |
167 | 2cc977e2 | ths | return;
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168 | 2cc977e2 | ths | } |
169 | 2cc977e2 | ths | len = r->io_header.dxfer_len - r->io_header.resid; |
170 | 4c41d2ef | Gerd Hoffmann | DPRINTF("Data ready tag=0x%x len=%d\n", r->req.tag, len);
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171 | 2cc977e2 | ths | |
172 | 2cc977e2 | ths | r->len = -1;
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173 | 4c41d2ef | Gerd Hoffmann | r->req.bus->complete(r->req.bus, SCSI_REASON_DATA, r->req.tag, len); |
174 | 89c0f643 | aurel32 | if (len == 0) |
175 | 89c0f643 | aurel32 | scsi_command_complete(r, 0);
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176 | 2cc977e2 | ths | } |
177 | 2cc977e2 | ths | |
178 | 2cc977e2 | ths | /* Read more data from scsi device into buffer. */
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179 | 2cc977e2 | ths | static void scsi_read_data(SCSIDevice *d, uint32_t tag) |
180 | 2cc977e2 | ths | { |
181 | d52affa7 | Gerd Hoffmann | SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev, d); |
182 | 4c41d2ef | Gerd Hoffmann | SCSIGenericReq *r; |
183 | 2cc977e2 | ths | int ret;
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184 | 2cc977e2 | ths | |
185 | 2cc977e2 | ths | DPRINTF("scsi_read_data 0x%x\n", tag);
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186 | 2cc977e2 | ths | r = scsi_find_request(s, tag); |
187 | 2cc977e2 | ths | if (!r) {
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188 | 2cc977e2 | ths | BADF("Bad read tag 0x%x\n", tag);
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189 | 2cc977e2 | ths | /* ??? This is the wrong error. */
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190 | 2cc977e2 | ths | scsi_command_complete(r, -EINVAL); |
191 | 2cc977e2 | ths | return;
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192 | 2cc977e2 | ths | } |
193 | 2cc977e2 | ths | |
194 | 2cc977e2 | ths | if (r->len == -1) { |
195 | 2cc977e2 | ths | scsi_command_complete(r, 0);
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196 | 2cc977e2 | ths | return;
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197 | 2cc977e2 | ths | } |
198 | 2cc977e2 | ths | |
199 | 29362ebe | Gerd Hoffmann | if (r->req.cmd.buf[0] == REQUEST_SENSE && s->driver_status & SG_ERR_DRIVER_SENSE) |
200 | 2cc977e2 | ths | { |
201 | 89c0f643 | aurel32 | s->senselen = MIN(r->len, s->senselen); |
202 | 89c0f643 | aurel32 | memcpy(r->buf, s->sensebuf, s->senselen); |
203 | 2cc977e2 | ths | r->io_header.driver_status = 0;
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204 | 89c0f643 | aurel32 | r->io_header.status = 0;
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205 | 89c0f643 | aurel32 | r->io_header.dxfer_len = s->senselen; |
206 | 2cc977e2 | ths | r->len = -1;
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207 | 4c41d2ef | Gerd Hoffmann | DPRINTF("Data ready tag=0x%x len=%d\n", r->req.tag, s->senselen);
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208 | a9dd6843 | aliguori | DPRINTF("Sense: %d %d %d %d %d %d %d %d\n",
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209 | a9dd6843 | aliguori | r->buf[0], r->buf[1], r->buf[2], r->buf[3], |
210 | a9dd6843 | aliguori | r->buf[4], r->buf[5], r->buf[6], r->buf[7]); |
211 | 4c41d2ef | Gerd Hoffmann | r->req.bus->complete(r->req.bus, SCSI_REASON_DATA, r->req.tag, s->senselen); |
212 | 2cc977e2 | ths | return;
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213 | 2cc977e2 | ths | } |
214 | 2cc977e2 | ths | |
215 | 251882b7 | Gerd Hoffmann | ret = execute_command(s->qdev.dinfo->bdrv, r, SG_DXFER_FROM_DEV, scsi_read_complete); |
216 | 2cc977e2 | ths | if (ret == -1) { |
217 | 2cc977e2 | ths | scsi_command_complete(r, -EINVAL); |
218 | 2cc977e2 | ths | return;
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219 | 2cc977e2 | ths | } |
220 | 2cc977e2 | ths | } |
221 | 2cc977e2 | ths | |
222 | 2cc977e2 | ths | static void scsi_write_complete(void * opaque, int ret) |
223 | 2cc977e2 | ths | { |
224 | 4c41d2ef | Gerd Hoffmann | SCSIGenericReq *r = (SCSIGenericReq *)opaque; |
225 | 4c41d2ef | Gerd Hoffmann | SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev, r->req.dev); |
226 | 2cc977e2 | ths | |
227 | 2cc977e2 | ths | DPRINTF("scsi_write_complete() ret = %d\n", ret);
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228 | 2cc977e2 | ths | if (ret) {
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229 | 2cc977e2 | ths | DPRINTF("IO error\n");
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230 | 2cc977e2 | ths | scsi_command_complete(r, ret); |
231 | 2cc977e2 | ths | return;
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232 | 2cc977e2 | ths | } |
233 | 2cc977e2 | ths | |
234 | 29362ebe | Gerd Hoffmann | if (r->req.cmd.buf[0] == MODE_SELECT && r->req.cmd.buf[4] == 12 && |
235 | 91376656 | Gerd Hoffmann | s->qdev.type == TYPE_TAPE) { |
236 | b07995e3 | Gerd Hoffmann | s->qdev.blocksize = (r->buf[9] << 16) | (r->buf[10] << 8) | r->buf[11]; |
237 | 4c41d2ef | Gerd Hoffmann | DPRINTF("block size %d\n", s->blocksize);
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238 | 89c0f643 | aurel32 | } |
239 | 89c0f643 | aurel32 | |
240 | 2cc977e2 | ths | scsi_command_complete(r, ret); |
241 | 2cc977e2 | ths | } |
242 | 2cc977e2 | ths | |
243 | 2cc977e2 | ths | /* Write data to a scsi device. Returns nonzero on failure.
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244 | 2cc977e2 | ths | The transfer may complete asynchronously. */
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245 | 2cc977e2 | ths | static int scsi_write_data(SCSIDevice *d, uint32_t tag) |
246 | 2cc977e2 | ths | { |
247 | d52affa7 | Gerd Hoffmann | SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev, d); |
248 | 4c41d2ef | Gerd Hoffmann | SCSIGenericReq *r; |
249 | 2cc977e2 | ths | int ret;
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250 | 2cc977e2 | ths | |
251 | 2cc977e2 | ths | DPRINTF("scsi_write_data 0x%x\n", tag);
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252 | 2cc977e2 | ths | r = scsi_find_request(s, tag); |
253 | 2cc977e2 | ths | if (!r) {
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254 | 2cc977e2 | ths | BADF("Bad write tag 0x%x\n", tag);
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255 | 2cc977e2 | ths | /* ??? This is the wrong error. */
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256 | 2cc977e2 | ths | scsi_command_complete(r, -EINVAL); |
257 | 2cc977e2 | ths | return 0; |
258 | 2cc977e2 | ths | } |
259 | 2cc977e2 | ths | |
260 | 2cc977e2 | ths | if (r->len == 0) { |
261 | 2cc977e2 | ths | r->len = r->buflen; |
262 | 4c41d2ef | Gerd Hoffmann | r->req.bus->complete(r->req.bus, SCSI_REASON_DATA, r->req.tag, r->len); |
263 | 2cc977e2 | ths | return 0; |
264 | 2cc977e2 | ths | } |
265 | 2cc977e2 | ths | |
266 | 251882b7 | Gerd Hoffmann | ret = execute_command(s->qdev.dinfo->bdrv, r, SG_DXFER_TO_DEV, scsi_write_complete); |
267 | 2cc977e2 | ths | if (ret == -1) { |
268 | 2cc977e2 | ths | scsi_command_complete(r, -EINVAL); |
269 | 2cc977e2 | ths | return 1; |
270 | 2cc977e2 | ths | } |
271 | 2cc977e2 | ths | |
272 | 2cc977e2 | ths | return 0; |
273 | 2cc977e2 | ths | } |
274 | 2cc977e2 | ths | |
275 | 2cc977e2 | ths | /* Return a pointer to the data buffer. */
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276 | 2cc977e2 | ths | static uint8_t *scsi_get_buf(SCSIDevice *d, uint32_t tag)
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277 | 2cc977e2 | ths | { |
278 | d52affa7 | Gerd Hoffmann | SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev, d); |
279 | 4c41d2ef | Gerd Hoffmann | SCSIGenericReq *r; |
280 | 2cc977e2 | ths | r = scsi_find_request(s, tag); |
281 | 2cc977e2 | ths | if (!r) {
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282 | 2cc977e2 | ths | BADF("Bad buffer tag 0x%x\n", tag);
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283 | 2cc977e2 | ths | return NULL; |
284 | 2cc977e2 | ths | } |
285 | 2cc977e2 | ths | return r->buf;
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286 | 2cc977e2 | ths | } |
287 | 2cc977e2 | ths | |
288 | 2ec749cb | Gerd Hoffmann | static void scsi_req_fixup(SCSIRequest *req) |
289 | 2cc977e2 | ths | { |
290 | 2ec749cb | Gerd Hoffmann | switch(req->cmd.buf[0]) { |
291 | 2cc977e2 | ths | case WRITE_10:
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292 | 2ec749cb | Gerd Hoffmann | req->cmd.buf[1] &= ~0x08; /* disable FUA */ |
293 | 2cc977e2 | ths | break;
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294 | 2cc977e2 | ths | case READ_10:
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295 | 2ec749cb | Gerd Hoffmann | req->cmd.buf[1] &= ~0x08; /* disable FUA */ |
296 | a9dd6843 | aliguori | break;
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297 | a9dd6843 | aliguori | case REWIND:
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298 | a9dd6843 | aliguori | case START_STOP:
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299 | 2ec749cb | Gerd Hoffmann | if (req->dev->type == TYPE_TAPE) {
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300 | 2ec749cb | Gerd Hoffmann | /* force IMMED, otherwise qemu waits end of command */
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301 | 2ec749cb | Gerd Hoffmann | req->cmd.buf[1] = 0x01; |
302 | 2ec749cb | Gerd Hoffmann | } |
303 | a9dd6843 | aliguori | break;
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304 | a9dd6843 | aliguori | } |
305 | a9dd6843 | aliguori | } |
306 | a9dd6843 | aliguori | |
307 | 2cc977e2 | ths | /* Execute a scsi command. Returns the length of the data expected by the
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308 | 2cc977e2 | ths | command. This will be Positive for data transfers from the device
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309 | 2cc977e2 | ths | (eg. disk reads), negative for transfers to the device (eg. disk writes),
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310 | 2cc977e2 | ths | and zero if the command does not transfer any data. */
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311 | 2cc977e2 | ths | |
312 | 2cc977e2 | ths | static int32_t scsi_send_command(SCSIDevice *d, uint32_t tag,
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313 | 2cc977e2 | ths | uint8_t *cmd, int lun)
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314 | 2cc977e2 | ths | { |
315 | d52affa7 | Gerd Hoffmann | SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev, d); |
316 | 4c41d2ef | Gerd Hoffmann | SCSIGenericReq *r; |
317 | d52affa7 | Gerd Hoffmann | SCSIBus *bus; |
318 | 2cc977e2 | ths | int ret;
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319 | 2cc977e2 | ths | |
320 | 89c0f643 | aurel32 | if (cmd[0] != REQUEST_SENSE && |
321 | 89c0f643 | aurel32 | (lun != s->lun || (cmd[1] >> 5) != s->lun)) { |
322 | 89c0f643 | aurel32 | DPRINTF("Unimplemented LUN %d\n", lun ? lun : cmd[1] >> 5); |
323 | 89c0f643 | aurel32 | |
324 | 89c0f643 | aurel32 | s->sensebuf[0] = 0x70; |
325 | 89c0f643 | aurel32 | s->sensebuf[1] = 0x00; |
326 | 89c0f643 | aurel32 | s->sensebuf[2] = ILLEGAL_REQUEST;
|
327 | 89c0f643 | aurel32 | s->sensebuf[3] = 0x00; |
328 | 89c0f643 | aurel32 | s->sensebuf[4] = 0x00; |
329 | 89c0f643 | aurel32 | s->sensebuf[5] = 0x00; |
330 | 89c0f643 | aurel32 | s->sensebuf[6] = 0x00; |
331 | 89c0f643 | aurel32 | s->senselen = 7;
|
332 | 89c0f643 | aurel32 | s->driver_status = SG_ERR_DRIVER_SENSE; |
333 | d52affa7 | Gerd Hoffmann | bus = scsi_bus_from_device(d); |
334 | d52affa7 | Gerd Hoffmann | bus->complete(bus, SCSI_REASON_DONE, tag, CHECK_CONDITION << 1);
|
335 | 89c0f643 | aurel32 | return 0; |
336 | 89c0f643 | aurel32 | } |
337 | 89c0f643 | aurel32 | |
338 | 2cc977e2 | ths | r = scsi_find_request(s, tag); |
339 | 2cc977e2 | ths | if (r) {
|
340 | 2cc977e2 | ths | BADF("Tag 0x%x already in use %p\n", tag, r);
|
341 | 2cc977e2 | ths | scsi_cancel_io(d, tag); |
342 | 2cc977e2 | ths | } |
343 | 89b08ae1 | Gerd Hoffmann | r = scsi_new_request(d, tag, lun); |
344 | 2cc977e2 | ths | |
345 | 2ec749cb | Gerd Hoffmann | if (-1 == scsi_req_parse(&r->req, cmd)) { |
346 | 2ec749cb | Gerd Hoffmann | BADF("Unsupported command length, command %x\n", cmd[0]); |
347 | 2ec749cb | Gerd Hoffmann | scsi_remove_request(r); |
348 | 2ec749cb | Gerd Hoffmann | return 0; |
349 | 2ec749cb | Gerd Hoffmann | } |
350 | 2ec749cb | Gerd Hoffmann | scsi_req_fixup(&r->req); |
351 | 2ec749cb | Gerd Hoffmann | |
352 | 2ec749cb | Gerd Hoffmann | DPRINTF("Command: lun=%d tag=0x%x data=0x%02x len %d\n", lun, tag,
|
353 | 2ec749cb | Gerd Hoffmann | cmd[0], r->req.cmd.xfer);
|
354 | 2cc977e2 | ths | |
355 | 2ec749cb | Gerd Hoffmann | if (r->req.cmd.xfer == 0) { |
356 | 2cc977e2 | ths | if (r->buf != NULL) |
357 | e3c916e6 | Jean-Christophe DUBOIS | qemu_free(r->buf); |
358 | 2cc977e2 | ths | r->buflen = 0;
|
359 | 2cc977e2 | ths | r->buf = NULL;
|
360 | 251882b7 | Gerd Hoffmann | ret = execute_command(s->qdev.dinfo->bdrv, r, SG_DXFER_NONE, scsi_command_complete); |
361 | 2cc977e2 | ths | if (ret == -1) { |
362 | 2cc977e2 | ths | scsi_command_complete(r, -EINVAL); |
363 | 2cc977e2 | ths | return 0; |
364 | 2cc977e2 | ths | } |
365 | 2cc977e2 | ths | return 0; |
366 | 2cc977e2 | ths | } |
367 | 2cc977e2 | ths | |
368 | 2ec749cb | Gerd Hoffmann | if (r->buflen != r->req.cmd.xfer) {
|
369 | 2cc977e2 | ths | if (r->buf != NULL) |
370 | e3c916e6 | Jean-Christophe DUBOIS | qemu_free(r->buf); |
371 | 2ec749cb | Gerd Hoffmann | r->buf = qemu_malloc(r->req.cmd.xfer); |
372 | 2ec749cb | Gerd Hoffmann | r->buflen = r->req.cmd.xfer; |
373 | 2cc977e2 | ths | } |
374 | 2cc977e2 | ths | |
375 | 2cc977e2 | ths | memset(r->buf, 0, r->buflen);
|
376 | 2ec749cb | Gerd Hoffmann | r->len = r->req.cmd.xfer; |
377 | 97a06435 | Gerd Hoffmann | if (r->req.cmd.mode == SCSI_XFER_TO_DEV) {
|
378 | 2cc977e2 | ths | r->len = 0;
|
379 | 2ec749cb | Gerd Hoffmann | return -r->req.cmd.xfer;
|
380 | 2cc977e2 | ths | } |
381 | 2cc977e2 | ths | |
382 | 2ec749cb | Gerd Hoffmann | return r->req.cmd.xfer;
|
383 | 2cc977e2 | ths | } |
384 | 2cc977e2 | ths | |
385 | 2cc977e2 | ths | static int get_blocksize(BlockDriverState *bdrv) |
386 | 2cc977e2 | ths | { |
387 | 2cc977e2 | ths | uint8_t cmd[10];
|
388 | 2cc977e2 | ths | uint8_t buf[8];
|
389 | 2cc977e2 | ths | uint8_t sensebuf[8];
|
390 | 2cc977e2 | ths | sg_io_hdr_t io_header; |
391 | 2cc977e2 | ths | int ret;
|
392 | 2cc977e2 | ths | |
393 | 4f26a486 | aliguori | memset(cmd, 0, sizeof(cmd)); |
394 | 4f26a486 | aliguori | memset(buf, 0, sizeof(buf)); |
395 | 2cc977e2 | ths | cmd[0] = READ_CAPACITY;
|
396 | 2cc977e2 | ths | |
397 | 2cc977e2 | ths | memset(&io_header, 0, sizeof(io_header)); |
398 | 2cc977e2 | ths | io_header.interface_id = 'S';
|
399 | 2cc977e2 | ths | io_header.dxfer_direction = SG_DXFER_FROM_DEV; |
400 | 2cc977e2 | ths | io_header.dxfer_len = sizeof(buf);
|
401 | 2cc977e2 | ths | io_header.dxferp = buf; |
402 | 2cc977e2 | ths | io_header.cmdp = cmd; |
403 | 2cc977e2 | ths | io_header.cmd_len = sizeof(cmd);
|
404 | 2cc977e2 | ths | io_header.mx_sb_len = sizeof(sensebuf);
|
405 | 2cc977e2 | ths | io_header.sbp = sensebuf; |
406 | 2cc977e2 | ths | io_header.timeout = 6000; /* XXX */ |
407 | 2cc977e2 | ths | |
408 | 221f715d | aliguori | ret = bdrv_ioctl(bdrv, SG_IO, &io_header); |
409 | 7d780669 | aliguori | if (ret < 0) |
410 | 2cc977e2 | ths | return -1; |
411 | 2cc977e2 | ths | |
412 | 2cc977e2 | ths | return (buf[4] << 24) | (buf[5] << 16) | (buf[6] << 8) | buf[7]; |
413 | 2cc977e2 | ths | } |
414 | 2cc977e2 | ths | |
415 | 89c0f643 | aurel32 | static int get_stream_blocksize(BlockDriverState *bdrv) |
416 | 89c0f643 | aurel32 | { |
417 | 89c0f643 | aurel32 | uint8_t cmd[6];
|
418 | 89c0f643 | aurel32 | uint8_t buf[12];
|
419 | 89c0f643 | aurel32 | uint8_t sensebuf[8];
|
420 | 89c0f643 | aurel32 | sg_io_hdr_t io_header; |
421 | 89c0f643 | aurel32 | int ret;
|
422 | 89c0f643 | aurel32 | |
423 | 89c0f643 | aurel32 | memset(cmd, 0, sizeof(cmd)); |
424 | 89c0f643 | aurel32 | memset(buf, 0, sizeof(buf)); |
425 | 89c0f643 | aurel32 | cmd[0] = MODE_SENSE;
|
426 | 89c0f643 | aurel32 | cmd[4] = sizeof(buf); |
427 | 89c0f643 | aurel32 | |
428 | 89c0f643 | aurel32 | memset(&io_header, 0, sizeof(io_header)); |
429 | 89c0f643 | aurel32 | io_header.interface_id = 'S';
|
430 | 89c0f643 | aurel32 | io_header.dxfer_direction = SG_DXFER_FROM_DEV; |
431 | 89c0f643 | aurel32 | io_header.dxfer_len = sizeof(buf);
|
432 | 89c0f643 | aurel32 | io_header.dxferp = buf; |
433 | 89c0f643 | aurel32 | io_header.cmdp = cmd; |
434 | 89c0f643 | aurel32 | io_header.cmd_len = sizeof(cmd);
|
435 | 89c0f643 | aurel32 | io_header.mx_sb_len = sizeof(sensebuf);
|
436 | 89c0f643 | aurel32 | io_header.sbp = sensebuf; |
437 | 89c0f643 | aurel32 | io_header.timeout = 6000; /* XXX */ |
438 | 89c0f643 | aurel32 | |
439 | 221f715d | aliguori | ret = bdrv_ioctl(bdrv, SG_IO, &io_header); |
440 | 7d780669 | aliguori | if (ret < 0) |
441 | 89c0f643 | aurel32 | return -1; |
442 | 89c0f643 | aurel32 | |
443 | 89c0f643 | aurel32 | return (buf[9] << 16) | (buf[10] << 8) | buf[11]; |
444 | 89c0f643 | aurel32 | } |
445 | 89c0f643 | aurel32 | |
446 | 2cc977e2 | ths | static void scsi_destroy(SCSIDevice *d) |
447 | 2cc977e2 | ths | { |
448 | d52affa7 | Gerd Hoffmann | SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev, d); |
449 | 9af99d98 | Gerd Hoffmann | SCSIGenericReq *r; |
450 | 2cc977e2 | ths | |
451 | 9af99d98 | Gerd Hoffmann | while (!QTAILQ_EMPTY(&s->qdev.requests)) {
|
452 | 9af99d98 | Gerd Hoffmann | r = DO_UPCAST(SCSIGenericReq, req, QTAILQ_FIRST(&s->qdev.requests)); |
453 | 9af99d98 | Gerd Hoffmann | scsi_remove_request(r); |
454 | 2cc977e2 | ths | } |
455 | 251882b7 | Gerd Hoffmann | drive_uninit(s->qdev.dinfo); |
456 | 2cc977e2 | ths | } |
457 | 2cc977e2 | ths | |
458 | d52affa7 | Gerd Hoffmann | static int scsi_generic_initfn(SCSIDevice *dev) |
459 | 2cc977e2 | ths | { |
460 | d52affa7 | Gerd Hoffmann | SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev, dev); |
461 | 2cc977e2 | ths | int sg_version;
|
462 | 2cc977e2 | ths | struct sg_scsi_id scsiid;
|
463 | 2cc977e2 | ths | |
464 | 251882b7 | Gerd Hoffmann | if (!s->qdev.dinfo || !s->qdev.dinfo->bdrv) {
|
465 | d52affa7 | Gerd Hoffmann | qemu_error("scsi-generic: drive property not set\n");
|
466 | d52affa7 | Gerd Hoffmann | return -1; |
467 | d52affa7 | Gerd Hoffmann | } |
468 | 2cc977e2 | ths | |
469 | d52affa7 | Gerd Hoffmann | /* check we are really using a /dev/sg* file */
|
470 | 251882b7 | Gerd Hoffmann | if (!bdrv_is_sg(s->qdev.dinfo->bdrv)) {
|
471 | d52affa7 | Gerd Hoffmann | qemu_error("scsi-generic: not /dev/sg*\n");
|
472 | d52affa7 | Gerd Hoffmann | return -1; |
473 | d52affa7 | Gerd Hoffmann | } |
474 | 2cc977e2 | ths | |
475 | 2cc977e2 | ths | /* check we are using a driver managing SG_IO (version 3 and after */
|
476 | 251882b7 | Gerd Hoffmann | if (bdrv_ioctl(s->qdev.dinfo->bdrv, SG_GET_VERSION_NUM, &sg_version) < 0 || |
477 | d52affa7 | Gerd Hoffmann | sg_version < 30000) {
|
478 | d52affa7 | Gerd Hoffmann | qemu_error("scsi-generic: scsi generic interface too old\n");
|
479 | d52affa7 | Gerd Hoffmann | return -1; |
480 | d52affa7 | Gerd Hoffmann | } |
481 | 2cc977e2 | ths | |
482 | 2cc977e2 | ths | /* get LUN of the /dev/sg? */
|
483 | 251882b7 | Gerd Hoffmann | if (bdrv_ioctl(s->qdev.dinfo->bdrv, SG_GET_SCSI_ID, &scsiid)) {
|
484 | d52affa7 | Gerd Hoffmann | qemu_error("scsi-generic: SG_GET_SCSI_ID ioctl failed\n");
|
485 | d52affa7 | Gerd Hoffmann | return -1; |
486 | d52affa7 | Gerd Hoffmann | } |
487 | 2cc977e2 | ths | |
488 | 2cc977e2 | ths | /* define device state */
|
489 | 2cc977e2 | ths | s->lun = scsiid.lun; |
490 | 89c0f643 | aurel32 | DPRINTF("LUN %d\n", s->lun);
|
491 | 91376656 | Gerd Hoffmann | s->qdev.type = scsiid.scsi_type; |
492 | 91376656 | Gerd Hoffmann | DPRINTF("device type %d\n", s->qdev.type);
|
493 | 91376656 | Gerd Hoffmann | if (s->qdev.type == TYPE_TAPE) {
|
494 | 251882b7 | Gerd Hoffmann | s->qdev.blocksize = get_stream_blocksize(s->qdev.dinfo->bdrv); |
495 | b07995e3 | Gerd Hoffmann | if (s->qdev.blocksize == -1) |
496 | b07995e3 | Gerd Hoffmann | s->qdev.blocksize = 0;
|
497 | 89c0f643 | aurel32 | } else {
|
498 | 251882b7 | Gerd Hoffmann | s->qdev.blocksize = get_blocksize(s->qdev.dinfo->bdrv); |
499 | 89c0f643 | aurel32 | /* removable media returns 0 if not present */
|
500 | b07995e3 | Gerd Hoffmann | if (s->qdev.blocksize <= 0) { |
501 | 91376656 | Gerd Hoffmann | if (s->qdev.type == TYPE_ROM || s->qdev.type == TYPE_WORM)
|
502 | b07995e3 | Gerd Hoffmann | s->qdev.blocksize = 2048;
|
503 | 89c0f643 | aurel32 | else
|
504 | b07995e3 | Gerd Hoffmann | s->qdev.blocksize = 512;
|
505 | 89c0f643 | aurel32 | } |
506 | 89c0f643 | aurel32 | } |
507 | b07995e3 | Gerd Hoffmann | DPRINTF("block size %d\n", s->qdev.blocksize);
|
508 | 2cc977e2 | ths | s->driver_status = 0;
|
509 | 2cc977e2 | ths | memset(s->sensebuf, 0, sizeof(s->sensebuf)); |
510 | d52affa7 | Gerd Hoffmann | return 0; |
511 | d52affa7 | Gerd Hoffmann | } |
512 | 2cc977e2 | ths | |
513 | d52affa7 | Gerd Hoffmann | static SCSIDeviceInfo scsi_generic_info = {
|
514 | d52affa7 | Gerd Hoffmann | .qdev.name = "scsi-generic",
|
515 | d52affa7 | Gerd Hoffmann | .qdev.desc = "pass through generic scsi device (/dev/sg*)",
|
516 | d52affa7 | Gerd Hoffmann | .qdev.size = sizeof(SCSIGenericState),
|
517 | d52affa7 | Gerd Hoffmann | .init = scsi_generic_initfn, |
518 | d52affa7 | Gerd Hoffmann | .destroy = scsi_destroy, |
519 | d52affa7 | Gerd Hoffmann | .send_command = scsi_send_command, |
520 | d52affa7 | Gerd Hoffmann | .read_data = scsi_read_data, |
521 | d52affa7 | Gerd Hoffmann | .write_data = scsi_write_data, |
522 | d52affa7 | Gerd Hoffmann | .cancel_io = scsi_cancel_io, |
523 | d52affa7 | Gerd Hoffmann | .get_buf = scsi_get_buf, |
524 | d52affa7 | Gerd Hoffmann | .qdev.props = (Property[]) { |
525 | 251882b7 | Gerd Hoffmann | DEFINE_PROP_DRIVE("drive", SCSIGenericState, qdev.dinfo),
|
526 | d52affa7 | Gerd Hoffmann | DEFINE_PROP_END_OF_LIST(), |
527 | d52affa7 | Gerd Hoffmann | }, |
528 | d52affa7 | Gerd Hoffmann | }; |
529 | 2cc977e2 | ths | |
530 | d52affa7 | Gerd Hoffmann | static void scsi_generic_register_devices(void) |
531 | d52affa7 | Gerd Hoffmann | { |
532 | d52affa7 | Gerd Hoffmann | scsi_qdev_register(&scsi_generic_info); |
533 | 2cc977e2 | ths | } |
534 | d52affa7 | Gerd Hoffmann | device_init(scsi_generic_register_devices) |
535 | d52affa7 | Gerd Hoffmann | |
536 | 2cc977e2 | ths | #endif /* __linux__ */ |