root / hw / scsi-generic.c @ 49a2942d
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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 | ed3a34a3 | Gerd Hoffmann | r->req.status = BUSY << 1;
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100 | 2cc977e2 | ths | else {
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101 | 2cc977e2 | ths | if (s->driver_status & SG_ERR_DRIVER_TIMEOUT) {
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102 | ed3a34a3 | Gerd Hoffmann | r->req.status = BUSY << 1;
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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 | ed3a34a3 | Gerd Hoffmann | r->req.status = CHECK_CONDITION << 1;
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108 | 2cc977e2 | ths | else
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109 | ed3a34a3 | Gerd Hoffmann | r->req.status = GOOD << 1;
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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 | 4c41d2ef | Gerd Hoffmann | r->req.bus->complete(r->req.bus, SCSI_REASON_DATA, r->req.tag, len); |
176 | 89c0f643 | aurel32 | if (len == 0) |
177 | 89c0f643 | aurel32 | scsi_command_complete(r, 0);
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178 | 2cc977e2 | ths | } |
179 | 2cc977e2 | ths | |
180 | 2cc977e2 | ths | /* Read more data from scsi device into buffer. */
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181 | 2cc977e2 | ths | static void scsi_read_data(SCSIDevice *d, uint32_t tag) |
182 | 2cc977e2 | ths | { |
183 | d52affa7 | Gerd Hoffmann | SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev, d); |
184 | 4c41d2ef | Gerd Hoffmann | SCSIGenericReq *r; |
185 | 2cc977e2 | ths | int ret;
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186 | 2cc977e2 | ths | |
187 | 2cc977e2 | ths | DPRINTF("scsi_read_data 0x%x\n", tag);
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188 | 2cc977e2 | ths | r = scsi_find_request(s, tag); |
189 | 2cc977e2 | ths | if (!r) {
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190 | 2cc977e2 | ths | BADF("Bad read tag 0x%x\n", tag);
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191 | 2cc977e2 | ths | /* ??? This is the wrong error. */
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192 | 2cc977e2 | ths | scsi_command_complete(r, -EINVAL); |
193 | 2cc977e2 | ths | return;
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194 | 2cc977e2 | ths | } |
195 | 2cc977e2 | ths | |
196 | 2cc977e2 | ths | if (r->len == -1) { |
197 | 2cc977e2 | ths | scsi_command_complete(r, 0);
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198 | 2cc977e2 | ths | return;
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199 | 2cc977e2 | ths | } |
200 | 2cc977e2 | ths | |
201 | 29362ebe | Gerd Hoffmann | if (r->req.cmd.buf[0] == REQUEST_SENSE && s->driver_status & SG_ERR_DRIVER_SENSE) |
202 | 2cc977e2 | ths | { |
203 | 89c0f643 | aurel32 | s->senselen = MIN(r->len, s->senselen); |
204 | 89c0f643 | aurel32 | memcpy(r->buf, s->sensebuf, s->senselen); |
205 | 2cc977e2 | ths | r->io_header.driver_status = 0;
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206 | 89c0f643 | aurel32 | r->io_header.status = 0;
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207 | 89c0f643 | aurel32 | r->io_header.dxfer_len = s->senselen; |
208 | 2cc977e2 | ths | r->len = -1;
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209 | 4c41d2ef | Gerd Hoffmann | DPRINTF("Data ready tag=0x%x len=%d\n", r->req.tag, s->senselen);
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210 | a9dd6843 | aliguori | DPRINTF("Sense: %d %d %d %d %d %d %d %d\n",
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211 | a9dd6843 | aliguori | r->buf[0], r->buf[1], r->buf[2], r->buf[3], |
212 | a9dd6843 | aliguori | r->buf[4], r->buf[5], r->buf[6], r->buf[7]); |
213 | 4c41d2ef | Gerd Hoffmann | r->req.bus->complete(r->req.bus, SCSI_REASON_DATA, r->req.tag, s->senselen); |
214 | 2cc977e2 | ths | return;
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215 | 2cc977e2 | ths | } |
216 | 2cc977e2 | ths | |
217 | 428c149b | Christoph Hellwig | ret = execute_command(s->bs, r, SG_DXFER_FROM_DEV, scsi_read_complete); |
218 | 2cc977e2 | ths | if (ret == -1) { |
219 | 2cc977e2 | ths | scsi_command_complete(r, -EINVAL); |
220 | 2cc977e2 | ths | return;
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221 | 2cc977e2 | ths | } |
222 | 2cc977e2 | ths | } |
223 | 2cc977e2 | ths | |
224 | 2cc977e2 | ths | static void scsi_write_complete(void * opaque, int ret) |
225 | 2cc977e2 | ths | { |
226 | 4c41d2ef | Gerd Hoffmann | SCSIGenericReq *r = (SCSIGenericReq *)opaque; |
227 | 4c41d2ef | Gerd Hoffmann | SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev, r->req.dev); |
228 | 2cc977e2 | ths | |
229 | 2cc977e2 | ths | DPRINTF("scsi_write_complete() ret = %d\n", ret);
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230 | 2cc977e2 | ths | if (ret) {
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231 | 2cc977e2 | ths | DPRINTF("IO error\n");
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232 | 2cc977e2 | ths | scsi_command_complete(r, ret); |
233 | 2cc977e2 | ths | return;
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234 | 2cc977e2 | ths | } |
235 | 2cc977e2 | ths | |
236 | 29362ebe | Gerd Hoffmann | if (r->req.cmd.buf[0] == MODE_SELECT && r->req.cmd.buf[4] == 12 && |
237 | 91376656 | Gerd Hoffmann | s->qdev.type == TYPE_TAPE) { |
238 | b07995e3 | Gerd Hoffmann | s->qdev.blocksize = (r->buf[9] << 16) | (r->buf[10] << 8) | r->buf[11]; |
239 | aa2b1e89 | Bernhard Kohl | DPRINTF("block size %d\n", s->qdev.blocksize);
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240 | 89c0f643 | aurel32 | } |
241 | 89c0f643 | aurel32 | |
242 | 2cc977e2 | ths | scsi_command_complete(r, ret); |
243 | 2cc977e2 | ths | } |
244 | 2cc977e2 | ths | |
245 | 2cc977e2 | ths | /* Write data to a scsi device. Returns nonzero on failure.
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246 | 2cc977e2 | ths | The transfer may complete asynchronously. */
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247 | 2cc977e2 | ths | static int scsi_write_data(SCSIDevice *d, uint32_t tag) |
248 | 2cc977e2 | ths | { |
249 | d52affa7 | Gerd Hoffmann | SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev, d); |
250 | 4c41d2ef | Gerd Hoffmann | SCSIGenericReq *r; |
251 | 2cc977e2 | ths | int ret;
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252 | 2cc977e2 | ths | |
253 | 2cc977e2 | ths | DPRINTF("scsi_write_data 0x%x\n", tag);
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254 | 2cc977e2 | ths | r = scsi_find_request(s, tag); |
255 | 2cc977e2 | ths | if (!r) {
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256 | 2cc977e2 | ths | BADF("Bad write tag 0x%x\n", tag);
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257 | 2cc977e2 | ths | /* ??? This is the wrong error. */
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258 | 2cc977e2 | ths | scsi_command_complete(r, -EINVAL); |
259 | 2cc977e2 | ths | return 0; |
260 | 2cc977e2 | ths | } |
261 | 2cc977e2 | ths | |
262 | 2cc977e2 | ths | if (r->len == 0) { |
263 | 2cc977e2 | ths | r->len = r->buflen; |
264 | 4c41d2ef | Gerd Hoffmann | r->req.bus->complete(r->req.bus, SCSI_REASON_DATA, r->req.tag, r->len); |
265 | 2cc977e2 | ths | return 0; |
266 | 2cc977e2 | ths | } |
267 | 2cc977e2 | ths | |
268 | 428c149b | Christoph Hellwig | ret = execute_command(s->bs, r, SG_DXFER_TO_DEV, scsi_write_complete); |
269 | 2cc977e2 | ths | if (ret == -1) { |
270 | 2cc977e2 | ths | scsi_command_complete(r, -EINVAL); |
271 | 2cc977e2 | ths | return 1; |
272 | 2cc977e2 | ths | } |
273 | 2cc977e2 | ths | |
274 | 2cc977e2 | ths | return 0; |
275 | 2cc977e2 | ths | } |
276 | 2cc977e2 | ths | |
277 | 2cc977e2 | ths | /* Return a pointer to the data buffer. */
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278 | 2cc977e2 | ths | static uint8_t *scsi_get_buf(SCSIDevice *d, uint32_t tag)
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279 | 2cc977e2 | ths | { |
280 | d52affa7 | Gerd Hoffmann | SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev, d); |
281 | 4c41d2ef | Gerd Hoffmann | SCSIGenericReq *r; |
282 | 2cc977e2 | ths | r = scsi_find_request(s, tag); |
283 | 2cc977e2 | ths | if (!r) {
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284 | 2cc977e2 | ths | BADF("Bad buffer tag 0x%x\n", tag);
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285 | 2cc977e2 | ths | return NULL; |
286 | 2cc977e2 | ths | } |
287 | 2cc977e2 | ths | return r->buf;
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288 | 2cc977e2 | ths | } |
289 | 2cc977e2 | ths | |
290 | 2ec749cb | Gerd Hoffmann | static void scsi_req_fixup(SCSIRequest *req) |
291 | 2cc977e2 | ths | { |
292 | 2ec749cb | Gerd Hoffmann | switch(req->cmd.buf[0]) { |
293 | 2cc977e2 | ths | case WRITE_10:
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294 | 2ec749cb | Gerd Hoffmann | req->cmd.buf[1] &= ~0x08; /* disable FUA */ |
295 | 2cc977e2 | ths | break;
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296 | 2cc977e2 | ths | case READ_10:
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297 | 2ec749cb | Gerd Hoffmann | req->cmd.buf[1] &= ~0x08; /* disable FUA */ |
298 | a9dd6843 | aliguori | break;
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299 | a9dd6843 | aliguori | case REWIND:
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300 | a9dd6843 | aliguori | case START_STOP:
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301 | 2ec749cb | Gerd Hoffmann | if (req->dev->type == TYPE_TAPE) {
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302 | 2ec749cb | Gerd Hoffmann | /* force IMMED, otherwise qemu waits end of command */
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303 | 2ec749cb | Gerd Hoffmann | req->cmd.buf[1] = 0x01; |
304 | 2ec749cb | Gerd Hoffmann | } |
305 | a9dd6843 | aliguori | break;
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306 | a9dd6843 | aliguori | } |
307 | a9dd6843 | aliguori | } |
308 | a9dd6843 | aliguori | |
309 | 2cc977e2 | ths | /* Execute a scsi command. Returns the length of the data expected by the
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310 | 2cc977e2 | ths | command. This will be Positive for data transfers from the device
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311 | 2cc977e2 | ths | (eg. disk reads), negative for transfers to the device (eg. disk writes),
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312 | 2cc977e2 | ths | and zero if the command does not transfer any data. */
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313 | 2cc977e2 | ths | |
314 | 2cc977e2 | ths | static int32_t scsi_send_command(SCSIDevice *d, uint32_t tag,
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315 | 2cc977e2 | ths | uint8_t *cmd, int lun)
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316 | 2cc977e2 | ths | { |
317 | d52affa7 | Gerd Hoffmann | SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev, d); |
318 | 4c41d2ef | Gerd Hoffmann | SCSIGenericReq *r; |
319 | d52affa7 | Gerd Hoffmann | SCSIBus *bus; |
320 | 2cc977e2 | ths | int ret;
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321 | 2cc977e2 | ths | |
322 | 89c0f643 | aurel32 | if (cmd[0] != REQUEST_SENSE && |
323 | 89c0f643 | aurel32 | (lun != s->lun || (cmd[1] >> 5) != s->lun)) { |
324 | 89c0f643 | aurel32 | DPRINTF("Unimplemented LUN %d\n", lun ? lun : cmd[1] >> 5); |
325 | 89c0f643 | aurel32 | |
326 | 89c0f643 | aurel32 | s->sensebuf[0] = 0x70; |
327 | 89c0f643 | aurel32 | s->sensebuf[1] = 0x00; |
328 | 89c0f643 | aurel32 | s->sensebuf[2] = ILLEGAL_REQUEST;
|
329 | 89c0f643 | aurel32 | s->sensebuf[3] = 0x00; |
330 | 89c0f643 | aurel32 | s->sensebuf[4] = 0x00; |
331 | 89c0f643 | aurel32 | s->sensebuf[5] = 0x00; |
332 | 89c0f643 | aurel32 | s->sensebuf[6] = 0x00; |
333 | 89c0f643 | aurel32 | s->senselen = 7;
|
334 | 89c0f643 | aurel32 | s->driver_status = SG_ERR_DRIVER_SENSE; |
335 | d52affa7 | Gerd Hoffmann | bus = scsi_bus_from_device(d); |
336 | d52affa7 | Gerd Hoffmann | bus->complete(bus, SCSI_REASON_DONE, tag, CHECK_CONDITION << 1);
|
337 | 89c0f643 | aurel32 | return 0; |
338 | 89c0f643 | aurel32 | } |
339 | 89c0f643 | aurel32 | |
340 | 2cc977e2 | ths | r = scsi_find_request(s, tag); |
341 | 2cc977e2 | ths | if (r) {
|
342 | 2cc977e2 | ths | BADF("Tag 0x%x already in use %p\n", tag, r);
|
343 | 2cc977e2 | ths | scsi_cancel_io(d, tag); |
344 | 2cc977e2 | ths | } |
345 | 89b08ae1 | Gerd Hoffmann | r = scsi_new_request(d, tag, lun); |
346 | 2cc977e2 | ths | |
347 | 2ec749cb | Gerd Hoffmann | if (-1 == scsi_req_parse(&r->req, cmd)) { |
348 | 2ec749cb | Gerd Hoffmann | BADF("Unsupported command length, command %x\n", cmd[0]); |
349 | 2ec749cb | Gerd Hoffmann | scsi_remove_request(r); |
350 | 2ec749cb | Gerd Hoffmann | return 0; |
351 | 2ec749cb | Gerd Hoffmann | } |
352 | 2ec749cb | Gerd Hoffmann | scsi_req_fixup(&r->req); |
353 | 2ec749cb | Gerd Hoffmann | |
354 | aa2b1e89 | Bernhard Kohl | DPRINTF("Command: lun=%d tag=0x%x len %zd data=0x%02x", lun, tag,
|
355 | aa2b1e89 | Bernhard Kohl | r->req.cmd.xfer, cmd[0]);
|
356 | aa2b1e89 | Bernhard Kohl | |
357 | aa2b1e89 | Bernhard Kohl | #ifdef DEBUG_SCSI
|
358 | aa2b1e89 | Bernhard Kohl | { |
359 | aa2b1e89 | Bernhard Kohl | int i;
|
360 | aa2b1e89 | Bernhard Kohl | for (i = 1; i < r->req.cmd.len; i++) { |
361 | aa2b1e89 | Bernhard Kohl | printf(" 0x%02x", cmd[i]);
|
362 | aa2b1e89 | Bernhard Kohl | } |
363 | aa2b1e89 | Bernhard Kohl | printf("\n");
|
364 | aa2b1e89 | Bernhard Kohl | } |
365 | aa2b1e89 | Bernhard Kohl | #endif
|
366 | 2cc977e2 | ths | |
367 | 2ec749cb | Gerd Hoffmann | if (r->req.cmd.xfer == 0) { |
368 | 2cc977e2 | ths | if (r->buf != NULL) |
369 | e3c916e6 | Jean-Christophe DUBOIS | qemu_free(r->buf); |
370 | 2cc977e2 | ths | r->buflen = 0;
|
371 | 2cc977e2 | ths | r->buf = NULL;
|
372 | 428c149b | Christoph Hellwig | ret = execute_command(s->bs, r, SG_DXFER_NONE, scsi_command_complete); |
373 | 2cc977e2 | ths | if (ret == -1) { |
374 | 2cc977e2 | ths | scsi_command_complete(r, -EINVAL); |
375 | 2cc977e2 | ths | return 0; |
376 | 2cc977e2 | ths | } |
377 | 2cc977e2 | ths | return 0; |
378 | 2cc977e2 | ths | } |
379 | 2cc977e2 | ths | |
380 | 2ec749cb | Gerd Hoffmann | if (r->buflen != r->req.cmd.xfer) {
|
381 | 2cc977e2 | ths | if (r->buf != NULL) |
382 | e3c916e6 | Jean-Christophe DUBOIS | qemu_free(r->buf); |
383 | 2ec749cb | Gerd Hoffmann | r->buf = qemu_malloc(r->req.cmd.xfer); |
384 | 2ec749cb | Gerd Hoffmann | r->buflen = r->req.cmd.xfer; |
385 | 2cc977e2 | ths | } |
386 | 2cc977e2 | ths | |
387 | 2cc977e2 | ths | memset(r->buf, 0, r->buflen);
|
388 | 2ec749cb | Gerd Hoffmann | r->len = r->req.cmd.xfer; |
389 | 97a06435 | Gerd Hoffmann | if (r->req.cmd.mode == SCSI_XFER_TO_DEV) {
|
390 | 2cc977e2 | ths | r->len = 0;
|
391 | 2ec749cb | Gerd Hoffmann | return -r->req.cmd.xfer;
|
392 | 2cc977e2 | ths | } |
393 | 2cc977e2 | ths | |
394 | 2ec749cb | Gerd Hoffmann | return r->req.cmd.xfer;
|
395 | 2cc977e2 | ths | } |
396 | 2cc977e2 | ths | |
397 | 2cc977e2 | ths | static int get_blocksize(BlockDriverState *bdrv) |
398 | 2cc977e2 | ths | { |
399 | 2cc977e2 | ths | uint8_t cmd[10];
|
400 | 2cc977e2 | ths | uint8_t buf[8];
|
401 | 2cc977e2 | ths | uint8_t sensebuf[8];
|
402 | 2cc977e2 | ths | sg_io_hdr_t io_header; |
403 | 2cc977e2 | ths | int ret;
|
404 | 2cc977e2 | ths | |
405 | 4f26a486 | aliguori | memset(cmd, 0, sizeof(cmd)); |
406 | 4f26a486 | aliguori | memset(buf, 0, sizeof(buf)); |
407 | 2cc977e2 | ths | cmd[0] = READ_CAPACITY;
|
408 | 2cc977e2 | ths | |
409 | 2cc977e2 | ths | memset(&io_header, 0, sizeof(io_header)); |
410 | 2cc977e2 | ths | io_header.interface_id = 'S';
|
411 | 2cc977e2 | ths | io_header.dxfer_direction = SG_DXFER_FROM_DEV; |
412 | 2cc977e2 | ths | io_header.dxfer_len = sizeof(buf);
|
413 | 2cc977e2 | ths | io_header.dxferp = buf; |
414 | 2cc977e2 | ths | io_header.cmdp = cmd; |
415 | 2cc977e2 | ths | io_header.cmd_len = sizeof(cmd);
|
416 | 2cc977e2 | ths | io_header.mx_sb_len = sizeof(sensebuf);
|
417 | 2cc977e2 | ths | io_header.sbp = sensebuf; |
418 | 2cc977e2 | ths | io_header.timeout = 6000; /* XXX */ |
419 | 2cc977e2 | ths | |
420 | 221f715d | aliguori | ret = bdrv_ioctl(bdrv, SG_IO, &io_header); |
421 | 7d780669 | aliguori | if (ret < 0) |
422 | 2cc977e2 | ths | return -1; |
423 | 2cc977e2 | ths | |
424 | 2cc977e2 | ths | return (buf[4] << 24) | (buf[5] << 16) | (buf[6] << 8) | buf[7]; |
425 | 2cc977e2 | ths | } |
426 | 2cc977e2 | ths | |
427 | 89c0f643 | aurel32 | static int get_stream_blocksize(BlockDriverState *bdrv) |
428 | 89c0f643 | aurel32 | { |
429 | 89c0f643 | aurel32 | uint8_t cmd[6];
|
430 | 89c0f643 | aurel32 | uint8_t buf[12];
|
431 | 89c0f643 | aurel32 | uint8_t sensebuf[8];
|
432 | 89c0f643 | aurel32 | sg_io_hdr_t io_header; |
433 | 89c0f643 | aurel32 | int ret;
|
434 | 89c0f643 | aurel32 | |
435 | 89c0f643 | aurel32 | memset(cmd, 0, sizeof(cmd)); |
436 | 89c0f643 | aurel32 | memset(buf, 0, sizeof(buf)); |
437 | 89c0f643 | aurel32 | cmd[0] = MODE_SENSE;
|
438 | 89c0f643 | aurel32 | cmd[4] = sizeof(buf); |
439 | 89c0f643 | aurel32 | |
440 | 89c0f643 | aurel32 | memset(&io_header, 0, sizeof(io_header)); |
441 | 89c0f643 | aurel32 | io_header.interface_id = 'S';
|
442 | 89c0f643 | aurel32 | io_header.dxfer_direction = SG_DXFER_FROM_DEV; |
443 | 89c0f643 | aurel32 | io_header.dxfer_len = sizeof(buf);
|
444 | 89c0f643 | aurel32 | io_header.dxferp = buf; |
445 | 89c0f643 | aurel32 | io_header.cmdp = cmd; |
446 | 89c0f643 | aurel32 | io_header.cmd_len = sizeof(cmd);
|
447 | 89c0f643 | aurel32 | io_header.mx_sb_len = sizeof(sensebuf);
|
448 | 89c0f643 | aurel32 | io_header.sbp = sensebuf; |
449 | 89c0f643 | aurel32 | io_header.timeout = 6000; /* XXX */ |
450 | 89c0f643 | aurel32 | |
451 | 221f715d | aliguori | ret = bdrv_ioctl(bdrv, SG_IO, &io_header); |
452 | 7d780669 | aliguori | if (ret < 0) |
453 | 89c0f643 | aurel32 | return -1; |
454 | 89c0f643 | aurel32 | |
455 | 89c0f643 | aurel32 | return (buf[9] << 16) | (buf[10] << 8) | buf[11]; |
456 | 89c0f643 | aurel32 | } |
457 | 89c0f643 | aurel32 | |
458 | f8b6d672 | Bernhard Kohl | static void scsi_generic_purge_requests(SCSIGenericState *s) |
459 | 2cc977e2 | ths | { |
460 | 9af99d98 | Gerd Hoffmann | SCSIGenericReq *r; |
461 | 2cc977e2 | ths | |
462 | 9af99d98 | Gerd Hoffmann | while (!QTAILQ_EMPTY(&s->qdev.requests)) {
|
463 | 9af99d98 | Gerd Hoffmann | r = DO_UPCAST(SCSIGenericReq, req, QTAILQ_FIRST(&s->qdev.requests)); |
464 | f8b6d672 | Bernhard Kohl | if (r->req.aiocb) {
|
465 | f8b6d672 | Bernhard Kohl | bdrv_aio_cancel(r->req.aiocb); |
466 | f8b6d672 | Bernhard Kohl | } |
467 | 9af99d98 | Gerd Hoffmann | scsi_remove_request(r); |
468 | 2cc977e2 | ths | } |
469 | f8b6d672 | Bernhard Kohl | } |
470 | f8b6d672 | Bernhard Kohl | |
471 | f8b6d672 | Bernhard Kohl | static void scsi_generic_reset(DeviceState *dev) |
472 | f8b6d672 | Bernhard Kohl | { |
473 | f8b6d672 | Bernhard Kohl | SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev.qdev, dev); |
474 | f8b6d672 | Bernhard Kohl | |
475 | f8b6d672 | Bernhard Kohl | scsi_generic_purge_requests(s); |
476 | f8b6d672 | Bernhard Kohl | } |
477 | f8b6d672 | Bernhard Kohl | |
478 | f8b6d672 | Bernhard Kohl | static void scsi_destroy(SCSIDevice *d) |
479 | f8b6d672 | Bernhard Kohl | { |
480 | f8b6d672 | Bernhard Kohl | SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev, d); |
481 | f8b6d672 | Bernhard Kohl | |
482 | f8b6d672 | Bernhard Kohl | scsi_generic_purge_requests(s); |
483 | f8b6cc00 | Markus Armbruster | blockdev_mark_auto_del(s->qdev.conf.bs); |
484 | 2cc977e2 | ths | } |
485 | 2cc977e2 | ths | |
486 | d52affa7 | Gerd Hoffmann | static int scsi_generic_initfn(SCSIDevice *dev) |
487 | 2cc977e2 | ths | { |
488 | d52affa7 | Gerd Hoffmann | SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev, dev); |
489 | 2cc977e2 | ths | int sg_version;
|
490 | 2cc977e2 | ths | struct sg_scsi_id scsiid;
|
491 | 2cc977e2 | ths | |
492 | f8b6cc00 | Markus Armbruster | if (!s->qdev.conf.bs) {
|
493 | 1ecda02b | Markus Armbruster | error_report("scsi-generic: drive property not set");
|
494 | d52affa7 | Gerd Hoffmann | return -1; |
495 | d52affa7 | Gerd Hoffmann | } |
496 | f8b6cc00 | Markus Armbruster | s->bs = s->qdev.conf.bs; |
497 | 2cc977e2 | ths | |
498 | d52affa7 | Gerd Hoffmann | /* check we are really using a /dev/sg* file */
|
499 | 428c149b | Christoph Hellwig | if (!bdrv_is_sg(s->bs)) {
|
500 | 1ecda02b | Markus Armbruster | error_report("scsi-generic: not /dev/sg*");
|
501 | d52affa7 | Gerd Hoffmann | return -1; |
502 | d52affa7 | Gerd Hoffmann | } |
503 | 2cc977e2 | ths | |
504 | 620f862e | Markus Armbruster | if (bdrv_get_on_error(s->bs, 0) != BLOCK_ERR_STOP_ENOSPC) { |
505 | 620f862e | Markus Armbruster | error_report("Device doesn't support drive option werror");
|
506 | 620f862e | Markus Armbruster | return -1; |
507 | 620f862e | Markus Armbruster | } |
508 | 620f862e | Markus Armbruster | if (bdrv_get_on_error(s->bs, 1) != BLOCK_ERR_REPORT) { |
509 | 620f862e | Markus Armbruster | error_report("Device doesn't support drive option rerror");
|
510 | 620f862e | Markus Armbruster | return -1; |
511 | 620f862e | Markus Armbruster | } |
512 | 620f862e | Markus Armbruster | |
513 | 2cc977e2 | ths | /* check we are using a driver managing SG_IO (version 3 and after */
|
514 | 428c149b | Christoph Hellwig | if (bdrv_ioctl(s->bs, SG_GET_VERSION_NUM, &sg_version) < 0 || |
515 | d52affa7 | Gerd Hoffmann | sg_version < 30000) {
|
516 | 1ecda02b | Markus Armbruster | error_report("scsi-generic: scsi generic interface too old");
|
517 | d52affa7 | Gerd Hoffmann | return -1; |
518 | d52affa7 | Gerd Hoffmann | } |
519 | 2cc977e2 | ths | |
520 | 2cc977e2 | ths | /* get LUN of the /dev/sg? */
|
521 | 428c149b | Christoph Hellwig | if (bdrv_ioctl(s->bs, SG_GET_SCSI_ID, &scsiid)) {
|
522 | 1ecda02b | Markus Armbruster | error_report("scsi-generic: SG_GET_SCSI_ID ioctl failed");
|
523 | d52affa7 | Gerd Hoffmann | return -1; |
524 | d52affa7 | Gerd Hoffmann | } |
525 | 2cc977e2 | ths | |
526 | 2cc977e2 | ths | /* define device state */
|
527 | 2cc977e2 | ths | s->lun = scsiid.lun; |
528 | 89c0f643 | aurel32 | DPRINTF("LUN %d\n", s->lun);
|
529 | 91376656 | Gerd Hoffmann | s->qdev.type = scsiid.scsi_type; |
530 | 91376656 | Gerd Hoffmann | DPRINTF("device type %d\n", s->qdev.type);
|
531 | 91376656 | Gerd Hoffmann | if (s->qdev.type == TYPE_TAPE) {
|
532 | 428c149b | Christoph Hellwig | s->qdev.blocksize = get_stream_blocksize(s->bs); |
533 | b07995e3 | Gerd Hoffmann | if (s->qdev.blocksize == -1) |
534 | b07995e3 | Gerd Hoffmann | s->qdev.blocksize = 0;
|
535 | 89c0f643 | aurel32 | } else {
|
536 | 428c149b | Christoph Hellwig | s->qdev.blocksize = get_blocksize(s->bs); |
537 | 89c0f643 | aurel32 | /* removable media returns 0 if not present */
|
538 | b07995e3 | Gerd Hoffmann | if (s->qdev.blocksize <= 0) { |
539 | 91376656 | Gerd Hoffmann | if (s->qdev.type == TYPE_ROM || s->qdev.type == TYPE_WORM)
|
540 | b07995e3 | Gerd Hoffmann | s->qdev.blocksize = 2048;
|
541 | 89c0f643 | aurel32 | else
|
542 | b07995e3 | Gerd Hoffmann | s->qdev.blocksize = 512;
|
543 | 89c0f643 | aurel32 | } |
544 | 89c0f643 | aurel32 | } |
545 | b07995e3 | Gerd Hoffmann | DPRINTF("block size %d\n", s->qdev.blocksize);
|
546 | 2cc977e2 | ths | s->driver_status = 0;
|
547 | 2cc977e2 | ths | memset(s->sensebuf, 0, sizeof(s->sensebuf)); |
548 | 7d0d6950 | Markus Armbruster | bdrv_set_removable(s->bs, 0);
|
549 | d52affa7 | Gerd Hoffmann | return 0; |
550 | d52affa7 | Gerd Hoffmann | } |
551 | 2cc977e2 | ths | |
552 | d52affa7 | Gerd Hoffmann | static SCSIDeviceInfo scsi_generic_info = {
|
553 | d52affa7 | Gerd Hoffmann | .qdev.name = "scsi-generic",
|
554 | d52affa7 | Gerd Hoffmann | .qdev.desc = "pass through generic scsi device (/dev/sg*)",
|
555 | d52affa7 | Gerd Hoffmann | .qdev.size = sizeof(SCSIGenericState),
|
556 | f8b6d672 | Bernhard Kohl | .qdev.reset = scsi_generic_reset, |
557 | d52affa7 | Gerd Hoffmann | .init = scsi_generic_initfn, |
558 | d52affa7 | Gerd Hoffmann | .destroy = scsi_destroy, |
559 | d52affa7 | Gerd Hoffmann | .send_command = scsi_send_command, |
560 | d52affa7 | Gerd Hoffmann | .read_data = scsi_read_data, |
561 | d52affa7 | Gerd Hoffmann | .write_data = scsi_write_data, |
562 | d52affa7 | Gerd Hoffmann | .cancel_io = scsi_cancel_io, |
563 | d52affa7 | Gerd Hoffmann | .get_buf = scsi_get_buf, |
564 | d52affa7 | Gerd Hoffmann | .qdev.props = (Property[]) { |
565 | 428c149b | Christoph Hellwig | DEFINE_BLOCK_PROPERTIES(SCSIGenericState, qdev.conf), |
566 | d52affa7 | Gerd Hoffmann | DEFINE_PROP_END_OF_LIST(), |
567 | d52affa7 | Gerd Hoffmann | }, |
568 | d52affa7 | Gerd Hoffmann | }; |
569 | 2cc977e2 | ths | |
570 | d52affa7 | Gerd Hoffmann | static void scsi_generic_register_devices(void) |
571 | d52affa7 | Gerd Hoffmann | { |
572 | d52affa7 | Gerd Hoffmann | scsi_qdev_register(&scsi_generic_info); |
573 | 2cc977e2 | ths | } |
574 | d52affa7 | Gerd Hoffmann | device_init(scsi_generic_register_devices) |
575 | d52affa7 | Gerd Hoffmann | |
576 | 2cc977e2 | ths | #endif /* __linux__ */ |