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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 | 8e31bf38 | Matthew Fernandez | * This code is licensed 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 | a3b16e71 | Paolo Bonzini | #define SG_ERR_DRIVER_TIMEOUT 0x06 |
43 | a3b16e71 | Paolo Bonzini | #define SG_ERR_DRIVER_SENSE 0x08 |
44 | a3b16e71 | Paolo Bonzini | |
45 | a3b16e71 | Paolo Bonzini | #define SG_ERR_DID_OK 0x00 |
46 | a3b16e71 | Paolo Bonzini | #define SG_ERR_DID_NO_CONNECT 0x01 |
47 | a3b16e71 | Paolo Bonzini | #define SG_ERR_DID_BUS_BUSY 0x02 |
48 | a3b16e71 | Paolo Bonzini | #define SG_ERR_DID_TIME_OUT 0x03 |
49 | 2cc977e2 | ths | |
50 | 2cc977e2 | ths | #ifndef MAX_UINT
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51 | 2cc977e2 | ths | #define MAX_UINT ((unsigned int)-1) |
52 | 2cc977e2 | ths | #endif
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53 | 2cc977e2 | ths | |
54 | 4c41d2ef | Gerd Hoffmann | typedef struct SCSIGenericReq { |
55 | 4c41d2ef | Gerd Hoffmann | SCSIRequest req; |
56 | 2cc977e2 | ths | uint8_t *buf; |
57 | 2cc977e2 | ths | int buflen;
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58 | 2cc977e2 | ths | int len;
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59 | 2cc977e2 | ths | sg_io_hdr_t io_header; |
60 | 4c41d2ef | Gerd Hoffmann | } SCSIGenericReq; |
61 | 2cc977e2 | ths | |
62 | ad2d30f7 | Paolo Bonzini | static void scsi_free_request(SCSIRequest *req) |
63 | 2cc977e2 | ths | { |
64 | ad2d30f7 | Paolo Bonzini | SCSIGenericReq *r = DO_UPCAST(SCSIGenericReq, req, req); |
65 | ad2d30f7 | Paolo Bonzini | |
66 | 7267c094 | Anthony Liguori | g_free(r->buf); |
67 | 2cc977e2 | ths | } |
68 | 2cc977e2 | ths | |
69 | 2cc977e2 | ths | /* Helper function for command completion. */
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70 | 2cc977e2 | ths | static void scsi_command_complete(void *opaque, int ret) |
71 | 2cc977e2 | ths | { |
72 | 682a9b21 | Paolo Bonzini | int status;
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73 | 4c41d2ef | Gerd Hoffmann | SCSIGenericReq *r = (SCSIGenericReq *)opaque; |
74 | 2cc977e2 | ths | |
75 | d33e0ce2 | Paolo Bonzini | r->req.aiocb = NULL;
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76 | a3b16e71 | Paolo Bonzini | if (r->io_header.driver_status & SG_ERR_DRIVER_SENSE) {
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77 | b45ef674 | Paolo Bonzini | r->req.sense_len = r->io_header.sb_len_wr; |
78 | a3b16e71 | Paolo Bonzini | } |
79 | 89c0f643 | aurel32 | |
80 | a1f0cce2 | Hannes Reinecke | if (ret != 0) { |
81 | a1f0cce2 | Hannes Reinecke | switch (ret) {
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82 | 2e7cc4d6 | Paolo Bonzini | case -EDOM:
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83 | 682a9b21 | Paolo Bonzini | status = TASK_SET_FULL; |
84 | 2e7cc4d6 | Paolo Bonzini | break;
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85 | a1f0cce2 | Hannes Reinecke | case -ENOMEM:
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86 | 682a9b21 | Paolo Bonzini | status = CHECK_CONDITION; |
87 | b45ef674 | Paolo Bonzini | scsi_req_build_sense(&r->req, SENSE_CODE(TARGET_FAILURE)); |
88 | a1f0cce2 | Hannes Reinecke | break;
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89 | a1f0cce2 | Hannes Reinecke | default:
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90 | 682a9b21 | Paolo Bonzini | status = CHECK_CONDITION; |
91 | b45ef674 | Paolo Bonzini | scsi_req_build_sense(&r->req, SENSE_CODE(IO_ERROR)); |
92 | a1f0cce2 | Hannes Reinecke | break;
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93 | a1f0cce2 | Hannes Reinecke | } |
94 | a1f0cce2 | Hannes Reinecke | } else {
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95 | a3b16e71 | Paolo Bonzini | if (r->io_header.host_status == SG_ERR_DID_NO_CONNECT ||
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96 | a3b16e71 | Paolo Bonzini | r->io_header.host_status == SG_ERR_DID_BUS_BUSY || |
97 | a3b16e71 | Paolo Bonzini | r->io_header.host_status == SG_ERR_DID_TIME_OUT || |
98 | a3b16e71 | Paolo Bonzini | (r->io_header.driver_status & SG_ERR_DRIVER_TIMEOUT)) { |
99 | 682a9b21 | Paolo Bonzini | status = BUSY; |
100 | 2cc977e2 | ths | BADF("Driver Timeout\n");
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101 | a3b16e71 | Paolo Bonzini | } else if (r->io_header.host_status) { |
102 | a3b16e71 | Paolo Bonzini | status = CHECK_CONDITION; |
103 | a3b16e71 | Paolo Bonzini | scsi_req_build_sense(&r->req, SENSE_CODE(I_T_NEXUS_LOSS)); |
104 | 682a9b21 | Paolo Bonzini | } else if (r->io_header.status) { |
105 | 682a9b21 | Paolo Bonzini | status = r->io_header.status; |
106 | b45ef674 | Paolo Bonzini | } else if (r->io_header.driver_status & SG_ERR_DRIVER_SENSE) { |
107 | 682a9b21 | Paolo Bonzini | status = CHECK_CONDITION; |
108 | 682a9b21 | Paolo Bonzini | } else {
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109 | 682a9b21 | Paolo Bonzini | status = GOOD; |
110 | 682a9b21 | Paolo Bonzini | } |
111 | 2cc977e2 | ths | } |
112 | 89c0f643 | aurel32 | DPRINTF("Command complete 0x%p tag=0x%x status=%d\n",
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113 | 682a9b21 | Paolo Bonzini | r, r->req.tag, status); |
114 | ed3a34a3 | Gerd Hoffmann | |
115 | 682a9b21 | Paolo Bonzini | scsi_req_complete(&r->req, status); |
116 | c9501c95 | Paolo Bonzini | if (!r->req.io_canceled) {
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117 | c9501c95 | Paolo Bonzini | scsi_req_unref(&r->req); |
118 | c9501c95 | Paolo Bonzini | } |
119 | 2cc977e2 | ths | } |
120 | 2cc977e2 | ths | |
121 | 2cc977e2 | ths | /* Cancel a pending data transfer. */
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122 | 5c6c0e51 | Hannes Reinecke | static void scsi_cancel_io(SCSIRequest *req) |
123 | 2cc977e2 | ths | { |
124 | 5c6c0e51 | Hannes Reinecke | SCSIGenericReq *r = DO_UPCAST(SCSIGenericReq, req, req); |
125 | 5c6c0e51 | Hannes Reinecke | |
126 | 5c6c0e51 | Hannes Reinecke | DPRINTF("Cancel tag=0x%x\n", req->tag);
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127 | 5c6c0e51 | Hannes Reinecke | if (r->req.aiocb) {
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128 | 5c6c0e51 | Hannes Reinecke | bdrv_aio_cancel(r->req.aiocb); |
129 | c9501c95 | Paolo Bonzini | |
130 | c9501c95 | Paolo Bonzini | /* This reference was left in by scsi_*_data. We take ownership of
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131 | c9501c95 | Paolo Bonzini | * it independent of whether bdrv_aio_cancel completes the request
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132 | c9501c95 | Paolo Bonzini | * or not. */
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133 | c9501c95 | Paolo Bonzini | scsi_req_unref(&r->req); |
134 | 2cc977e2 | ths | } |
135 | 5c6c0e51 | Hannes Reinecke | r->req.aiocb = NULL;
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136 | 2cc977e2 | ths | } |
137 | 2cc977e2 | ths | |
138 | 2cc977e2 | ths | static int execute_command(BlockDriverState *bdrv, |
139 | 4c41d2ef | Gerd Hoffmann | SCSIGenericReq *r, int direction,
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140 | 2cc977e2 | ths | BlockDriverCompletionFunc *complete) |
141 | 2cc977e2 | ths | { |
142 | 2cc977e2 | ths | r->io_header.interface_id = 'S';
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143 | 2cc977e2 | ths | r->io_header.dxfer_direction = direction; |
144 | 2cc977e2 | ths | r->io_header.dxferp = r->buf; |
145 | 2cc977e2 | ths | r->io_header.dxfer_len = r->buflen; |
146 | 29362ebe | Gerd Hoffmann | r->io_header.cmdp = r->req.cmd.buf; |
147 | 29362ebe | Gerd Hoffmann | r->io_header.cmd_len = r->req.cmd.len; |
148 | b45ef674 | Paolo Bonzini | r->io_header.mx_sb_len = sizeof(r->req.sense);
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149 | b45ef674 | Paolo Bonzini | r->io_header.sbp = r->req.sense; |
150 | 2cc977e2 | ths | r->io_header.timeout = MAX_UINT; |
151 | 2cc977e2 | ths | r->io_header.usr_ptr = r; |
152 | 2cc977e2 | ths | r->io_header.flags |= SG_FLAG_DIRECT_IO; |
153 | 2cc977e2 | ths | |
154 | 4c41d2ef | Gerd Hoffmann | r->req.aiocb = bdrv_aio_ioctl(bdrv, SG_IO, &r->io_header, complete, r); |
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 | 9b6eef8a | Paolo Bonzini | SCSIDevice *s = r->req.dev; |
163 | 2cc977e2 | ths | int len;
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164 | 2cc977e2 | ths | |
165 | d33e0ce2 | Paolo Bonzini | r->req.aiocb = NULL;
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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 | 9b6eef8a | Paolo Bonzini | /* Snoop READ CAPACITY output to set the blocksize. */
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179 | 9b6eef8a | Paolo Bonzini | if (r->req.cmd.buf[0] == READ_CAPACITY_10) { |
180 | 9b6eef8a | Paolo Bonzini | s->blocksize = ldl_be_p(&r->buf[4]);
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181 | 7877903a | Paolo Bonzini | s->max_lba = ldl_be_p(&r->buf[0]);
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182 | 9b6eef8a | Paolo Bonzini | } else if (r->req.cmd.buf[0] == SERVICE_ACTION_IN_16 && |
183 | 9b6eef8a | Paolo Bonzini | (r->req.cmd.buf[1] & 31) == SAI_READ_CAPACITY_16) { |
184 | 9b6eef8a | Paolo Bonzini | s->blocksize = ldl_be_p(&r->buf[8]);
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185 | 7877903a | Paolo Bonzini | s->max_lba = ldq_be_p(&r->buf[0]);
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186 | 9b6eef8a | Paolo Bonzini | } |
187 | 9b6eef8a | Paolo Bonzini | bdrv_set_buffer_alignment(s->conf.bs, s->blocksize); |
188 | 9b6eef8a | Paolo Bonzini | |
189 | ab9adc88 | Paolo Bonzini | scsi_req_data(&r->req, len); |
190 | c9501c95 | Paolo Bonzini | if (!r->req.io_canceled) {
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191 | c9501c95 | Paolo Bonzini | scsi_req_unref(&r->req); |
192 | c9501c95 | Paolo Bonzini | } |
193 | 40f16dd1 | Paolo Bonzini | } |
194 | 2cc977e2 | ths | } |
195 | 2cc977e2 | ths | |
196 | 2cc977e2 | ths | /* Read more data from scsi device into buffer. */
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197 | 5c6c0e51 | Hannes Reinecke | static void scsi_read_data(SCSIRequest *req) |
198 | 2cc977e2 | ths | { |
199 | 5c6c0e51 | Hannes Reinecke | SCSIGenericReq *r = DO_UPCAST(SCSIGenericReq, req, req); |
200 | 8869e103 | Paolo Bonzini | SCSIDevice *s = r->req.dev; |
201 | 2cc977e2 | ths | int ret;
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202 | 2cc977e2 | ths | |
203 | 5c6c0e51 | Hannes Reinecke | DPRINTF("scsi_read_data 0x%x\n", req->tag);
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204 | c9501c95 | Paolo Bonzini | |
205 | c9501c95 | Paolo Bonzini | /* The request is used as the AIO opaque value, so add a ref. */
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206 | c9501c95 | Paolo Bonzini | scsi_req_ref(&r->req); |
207 | 2cc977e2 | ths | if (r->len == -1) { |
208 | 2cc977e2 | ths | scsi_command_complete(r, 0);
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209 | 2cc977e2 | ths | return;
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210 | 2cc977e2 | ths | } |
211 | 2cc977e2 | ths | |
212 | 8869e103 | Paolo Bonzini | ret = execute_command(s->conf.bs, r, SG_DXFER_FROM_DEV, scsi_read_complete); |
213 | a1f0cce2 | Hannes Reinecke | if (ret < 0) { |
214 | a1f0cce2 | Hannes Reinecke | scsi_command_complete(r, ret); |
215 | 2cc977e2 | ths | } |
216 | 2cc977e2 | ths | } |
217 | 2cc977e2 | ths | |
218 | 2cc977e2 | ths | static void scsi_write_complete(void * opaque, int ret) |
219 | 2cc977e2 | ths | { |
220 | 4c41d2ef | Gerd Hoffmann | SCSIGenericReq *r = (SCSIGenericReq *)opaque; |
221 | 8869e103 | Paolo Bonzini | SCSIDevice *s = r->req.dev; |
222 | 2cc977e2 | ths | |
223 | 2cc977e2 | ths | DPRINTF("scsi_write_complete() ret = %d\n", ret);
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224 | d33e0ce2 | Paolo Bonzini | r->req.aiocb = NULL;
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225 | 2cc977e2 | ths | if (ret) {
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226 | 2cc977e2 | ths | DPRINTF("IO error\n");
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227 | 2cc977e2 | ths | scsi_command_complete(r, ret); |
228 | 2cc977e2 | ths | return;
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229 | 2cc977e2 | ths | } |
230 | 2cc977e2 | ths | |
231 | 29362ebe | Gerd Hoffmann | if (r->req.cmd.buf[0] == MODE_SELECT && r->req.cmd.buf[4] == 12 && |
232 | 8869e103 | Paolo Bonzini | s->type == TYPE_TAPE) { |
233 | 8869e103 | Paolo Bonzini | s->blocksize = (r->buf[9] << 16) | (r->buf[10] << 8) | r->buf[11]; |
234 | 8869e103 | Paolo Bonzini | DPRINTF("block size %d\n", s->blocksize);
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235 | 89c0f643 | aurel32 | } |
236 | 89c0f643 | aurel32 | |
237 | 2cc977e2 | ths | scsi_command_complete(r, ret); |
238 | 2cc977e2 | ths | } |
239 | 2cc977e2 | ths | |
240 | 2cc977e2 | ths | /* Write data to a scsi device. Returns nonzero on failure.
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241 | 2cc977e2 | ths | The transfer may complete asynchronously. */
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242 | 42741212 | Paolo Bonzini | static void scsi_write_data(SCSIRequest *req) |
243 | 2cc977e2 | ths | { |
244 | 5c6c0e51 | Hannes Reinecke | SCSIGenericReq *r = DO_UPCAST(SCSIGenericReq, req, req); |
245 | 8869e103 | Paolo Bonzini | SCSIDevice *s = r->req.dev; |
246 | 2cc977e2 | ths | int ret;
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247 | 2cc977e2 | ths | |
248 | 5c6c0e51 | Hannes Reinecke | DPRINTF("scsi_write_data 0x%x\n", req->tag);
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249 | 2cc977e2 | ths | if (r->len == 0) { |
250 | 2cc977e2 | ths | r->len = r->buflen; |
251 | ab9adc88 | Paolo Bonzini | scsi_req_data(&r->req, r->len); |
252 | 42741212 | Paolo Bonzini | return;
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253 | 2cc977e2 | ths | } |
254 | 2cc977e2 | ths | |
255 | c9501c95 | Paolo Bonzini | /* The request is used as the AIO opaque value, so add a ref. */
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256 | c9501c95 | Paolo Bonzini | scsi_req_ref(&r->req); |
257 | 8869e103 | Paolo Bonzini | ret = execute_command(s->conf.bs, r, SG_DXFER_TO_DEV, scsi_write_complete); |
258 | a1f0cce2 | Hannes Reinecke | if (ret < 0) { |
259 | a1f0cce2 | Hannes Reinecke | scsi_command_complete(r, ret); |
260 | 2cc977e2 | ths | } |
261 | 2cc977e2 | ths | } |
262 | 2cc977e2 | ths | |
263 | 2cc977e2 | ths | /* Return a pointer to the data buffer. */
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264 | 5c6c0e51 | Hannes Reinecke | static uint8_t *scsi_get_buf(SCSIRequest *req)
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265 | 2cc977e2 | ths | { |
266 | 5c6c0e51 | Hannes Reinecke | SCSIGenericReq *r = DO_UPCAST(SCSIGenericReq, req, req); |
267 | 5c6c0e51 | Hannes Reinecke | |
268 | 2cc977e2 | ths | return r->buf;
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269 | 2cc977e2 | ths | } |
270 | 2cc977e2 | ths | |
271 | 2cc977e2 | ths | /* Execute a scsi command. Returns the length of the data expected by the
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272 | 2cc977e2 | ths | command. This will be Positive for data transfers from the device
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273 | 2cc977e2 | ths | (eg. disk reads), negative for transfers to the device (eg. disk writes),
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274 | 2cc977e2 | ths | and zero if the command does not transfer any data. */
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275 | 2cc977e2 | ths | |
276 | 5c6c0e51 | Hannes Reinecke | static int32_t scsi_send_command(SCSIRequest *req, uint8_t *cmd)
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277 | 2cc977e2 | ths | { |
278 | 5c6c0e51 | Hannes Reinecke | SCSIGenericReq *r = DO_UPCAST(SCSIGenericReq, req, req); |
279 | 8869e103 | Paolo Bonzini | SCSIDevice *s = r->req.dev; |
280 | 2cc977e2 | ths | int ret;
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281 | 2cc977e2 | ths | |
282 | aa2b1e89 | Bernhard Kohl | DPRINTF("Command: lun=%d tag=0x%x len %zd data=0x%02x", lun, tag,
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283 | aa2b1e89 | Bernhard Kohl | r->req.cmd.xfer, cmd[0]);
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284 | aa2b1e89 | Bernhard Kohl | |
285 | aa2b1e89 | Bernhard Kohl | #ifdef DEBUG_SCSI
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286 | aa2b1e89 | Bernhard Kohl | { |
287 | aa2b1e89 | Bernhard Kohl | int i;
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288 | aa2b1e89 | Bernhard Kohl | for (i = 1; i < r->req.cmd.len; i++) { |
289 | aa2b1e89 | Bernhard Kohl | printf(" 0x%02x", cmd[i]);
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290 | aa2b1e89 | Bernhard Kohl | } |
291 | aa2b1e89 | Bernhard Kohl | printf("\n");
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292 | aa2b1e89 | Bernhard Kohl | } |
293 | aa2b1e89 | Bernhard Kohl | #endif
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294 | 2cc977e2 | ths | |
295 | 2ec749cb | Gerd Hoffmann | if (r->req.cmd.xfer == 0) { |
296 | 2cc977e2 | ths | if (r->buf != NULL) |
297 | 7267c094 | Anthony Liguori | g_free(r->buf); |
298 | 2cc977e2 | ths | r->buflen = 0;
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299 | 2cc977e2 | ths | r->buf = NULL;
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300 | c9501c95 | Paolo Bonzini | /* The request is used as the AIO opaque value, so add a ref. */
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301 | c9501c95 | Paolo Bonzini | scsi_req_ref(&r->req); |
302 | 8869e103 | Paolo Bonzini | ret = execute_command(s->conf.bs, r, SG_DXFER_NONE, scsi_command_complete); |
303 | a1f0cce2 | Hannes Reinecke | if (ret < 0) { |
304 | a1f0cce2 | Hannes Reinecke | scsi_command_complete(r, ret); |
305 | a1f0cce2 | Hannes Reinecke | return 0; |
306 | 2cc977e2 | ths | } |
307 | 2cc977e2 | ths | return 0; |
308 | 2cc977e2 | ths | } |
309 | 2cc977e2 | ths | |
310 | 2ec749cb | Gerd Hoffmann | if (r->buflen != r->req.cmd.xfer) {
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311 | 2cc977e2 | ths | if (r->buf != NULL) |
312 | 7267c094 | Anthony Liguori | g_free(r->buf); |
313 | 7267c094 | Anthony Liguori | r->buf = g_malloc(r->req.cmd.xfer); |
314 | 2ec749cb | Gerd Hoffmann | r->buflen = r->req.cmd.xfer; |
315 | 2cc977e2 | ths | } |
316 | 2cc977e2 | ths | |
317 | 2cc977e2 | ths | memset(r->buf, 0, r->buflen);
|
318 | 2ec749cb | Gerd Hoffmann | r->len = r->req.cmd.xfer; |
319 | 97a06435 | Gerd Hoffmann | if (r->req.cmd.mode == SCSI_XFER_TO_DEV) {
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320 | 2cc977e2 | ths | r->len = 0;
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321 | 5c6c0e51 | Hannes Reinecke | return -r->req.cmd.xfer;
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322 | ad2d30f7 | Paolo Bonzini | } else {
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323 | 5c6c0e51 | Hannes Reinecke | return r->req.cmd.xfer;
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324 | 2cc977e2 | ths | } |
325 | 2cc977e2 | ths | } |
326 | 2cc977e2 | ths | |
327 | 89c0f643 | aurel32 | static int get_stream_blocksize(BlockDriverState *bdrv) |
328 | 89c0f643 | aurel32 | { |
329 | 89c0f643 | aurel32 | uint8_t cmd[6];
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330 | 89c0f643 | aurel32 | uint8_t buf[12];
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331 | 89c0f643 | aurel32 | uint8_t sensebuf[8];
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332 | 89c0f643 | aurel32 | sg_io_hdr_t io_header; |
333 | 89c0f643 | aurel32 | int ret;
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334 | 89c0f643 | aurel32 | |
335 | 89c0f643 | aurel32 | memset(cmd, 0, sizeof(cmd)); |
336 | 89c0f643 | aurel32 | memset(buf, 0, sizeof(buf)); |
337 | 89c0f643 | aurel32 | cmd[0] = MODE_SENSE;
|
338 | 89c0f643 | aurel32 | cmd[4] = sizeof(buf); |
339 | 89c0f643 | aurel32 | |
340 | 89c0f643 | aurel32 | memset(&io_header, 0, sizeof(io_header)); |
341 | 89c0f643 | aurel32 | io_header.interface_id = 'S';
|
342 | 89c0f643 | aurel32 | io_header.dxfer_direction = SG_DXFER_FROM_DEV; |
343 | 89c0f643 | aurel32 | io_header.dxfer_len = sizeof(buf);
|
344 | 89c0f643 | aurel32 | io_header.dxferp = buf; |
345 | 89c0f643 | aurel32 | io_header.cmdp = cmd; |
346 | 89c0f643 | aurel32 | io_header.cmd_len = sizeof(cmd);
|
347 | 89c0f643 | aurel32 | io_header.mx_sb_len = sizeof(sensebuf);
|
348 | 89c0f643 | aurel32 | io_header.sbp = sensebuf; |
349 | 89c0f643 | aurel32 | io_header.timeout = 6000; /* XXX */ |
350 | 89c0f643 | aurel32 | |
351 | 221f715d | aliguori | ret = bdrv_ioctl(bdrv, SG_IO, &io_header); |
352 | fe0ed712 | Paolo Bonzini | if (ret < 0 || io_header.driver_status || io_header.host_status) { |
353 | 89c0f643 | aurel32 | return -1; |
354 | fe0ed712 | Paolo Bonzini | } |
355 | 89c0f643 | aurel32 | return (buf[9] << 16) | (buf[10] << 8) | buf[11]; |
356 | 89c0f643 | aurel32 | } |
357 | 89c0f643 | aurel32 | |
358 | f8b6d672 | Bernhard Kohl | static void scsi_generic_reset(DeviceState *dev) |
359 | f8b6d672 | Bernhard Kohl | { |
360 | 8869e103 | Paolo Bonzini | SCSIDevice *s = DO_UPCAST(SCSIDevice, qdev, dev); |
361 | f8b6d672 | Bernhard Kohl | |
362 | 8869e103 | Paolo Bonzini | scsi_device_purge_requests(s, SENSE_CODE(RESET)); |
363 | f8b6d672 | Bernhard Kohl | } |
364 | f8b6d672 | Bernhard Kohl | |
365 | 8869e103 | Paolo Bonzini | static void scsi_destroy(SCSIDevice *s) |
366 | f8b6d672 | Bernhard Kohl | { |
367 | 8869e103 | Paolo Bonzini | scsi_device_purge_requests(s, SENSE_CODE(NO_SENSE)); |
368 | 8869e103 | Paolo Bonzini | blockdev_mark_auto_del(s->conf.bs); |
369 | 2cc977e2 | ths | } |
370 | 2cc977e2 | ths | |
371 | 8869e103 | Paolo Bonzini | static int scsi_generic_initfn(SCSIDevice *s) |
372 | 2cc977e2 | ths | { |
373 | 2cc977e2 | ths | int sg_version;
|
374 | 2cc977e2 | ths | struct sg_scsi_id scsiid;
|
375 | 2cc977e2 | ths | |
376 | 8869e103 | Paolo Bonzini | if (!s->conf.bs) {
|
377 | 6a84cb1f | Markus Armbruster | error_report("drive property not set");
|
378 | d52affa7 | Gerd Hoffmann | return -1; |
379 | d52affa7 | Gerd Hoffmann | } |
380 | 2cc977e2 | ths | |
381 | d52affa7 | Gerd Hoffmann | /* check we are really using a /dev/sg* file */
|
382 | 8869e103 | Paolo Bonzini | if (!bdrv_is_sg(s->conf.bs)) {
|
383 | 6a84cb1f | Markus Armbruster | error_report("not /dev/sg*");
|
384 | d52affa7 | Gerd Hoffmann | return -1; |
385 | d52affa7 | Gerd Hoffmann | } |
386 | 2cc977e2 | ths | |
387 | 8869e103 | Paolo Bonzini | if (bdrv_get_on_error(s->conf.bs, 0) != BLOCK_ERR_STOP_ENOSPC) { |
388 | 620f862e | Markus Armbruster | error_report("Device doesn't support drive option werror");
|
389 | 620f862e | Markus Armbruster | return -1; |
390 | 620f862e | Markus Armbruster | } |
391 | 8869e103 | Paolo Bonzini | if (bdrv_get_on_error(s->conf.bs, 1) != BLOCK_ERR_REPORT) { |
392 | 620f862e | Markus Armbruster | error_report("Device doesn't support drive option rerror");
|
393 | 620f862e | Markus Armbruster | return -1; |
394 | 620f862e | Markus Armbruster | } |
395 | 620f862e | Markus Armbruster | |
396 | 2cc977e2 | ths | /* check we are using a driver managing SG_IO (version 3 and after */
|
397 | 8869e103 | Paolo Bonzini | if (bdrv_ioctl(s->conf.bs, SG_GET_VERSION_NUM, &sg_version) < 0 || |
398 | d52affa7 | Gerd Hoffmann | sg_version < 30000) {
|
399 | 6a84cb1f | Markus Armbruster | error_report("scsi generic interface too old");
|
400 | d52affa7 | Gerd Hoffmann | return -1; |
401 | d52affa7 | Gerd Hoffmann | } |
402 | 2cc977e2 | ths | |
403 | 2cc977e2 | ths | /* get LUN of the /dev/sg? */
|
404 | 8869e103 | Paolo Bonzini | if (bdrv_ioctl(s->conf.bs, SG_GET_SCSI_ID, &scsiid)) {
|
405 | 6a84cb1f | Markus Armbruster | error_report("SG_GET_SCSI_ID ioctl failed");
|
406 | d52affa7 | Gerd Hoffmann | return -1; |
407 | d52affa7 | Gerd Hoffmann | } |
408 | 2cc977e2 | ths | |
409 | 2cc977e2 | ths | /* define device state */
|
410 | 8869e103 | Paolo Bonzini | s->type = scsiid.scsi_type; |
411 | 8869e103 | Paolo Bonzini | DPRINTF("device type %d\n", s->type);
|
412 | 28b77657 | Paolo Bonzini | if (s->type == TYPE_DISK || s->type == TYPE_ROM) {
|
413 | 28b77657 | Paolo Bonzini | add_boot_device_path(s->conf.bootindex, &s->qdev, NULL);
|
414 | 28b77657 | Paolo Bonzini | } |
415 | 28b77657 | Paolo Bonzini | |
416 | 9b6eef8a | Paolo Bonzini | switch (s->type) {
|
417 | 9b6eef8a | Paolo Bonzini | case TYPE_TAPE:
|
418 | 8869e103 | Paolo Bonzini | s->blocksize = get_stream_blocksize(s->conf.bs); |
419 | 8869e103 | Paolo Bonzini | if (s->blocksize == -1) { |
420 | 8869e103 | Paolo Bonzini | s->blocksize = 0;
|
421 | 8869e103 | Paolo Bonzini | } |
422 | 9b6eef8a | Paolo Bonzini | break;
|
423 | 9b6eef8a | Paolo Bonzini | |
424 | 9b6eef8a | Paolo Bonzini | /* Make a guess for block devices, we'll fix it when the guest sends.
|
425 | 9b6eef8a | Paolo Bonzini | * READ CAPACITY. If they don't, they likely would assume these sizes
|
426 | 9b6eef8a | Paolo Bonzini | * anyway. (TODO: they could also send MODE SENSE).
|
427 | 9b6eef8a | Paolo Bonzini | */
|
428 | 9b6eef8a | Paolo Bonzini | case TYPE_ROM:
|
429 | 9b6eef8a | Paolo Bonzini | case TYPE_WORM:
|
430 | 9b6eef8a | Paolo Bonzini | s->blocksize = 2048;
|
431 | 9b6eef8a | Paolo Bonzini | break;
|
432 | 9b6eef8a | Paolo Bonzini | default:
|
433 | 9b6eef8a | Paolo Bonzini | s->blocksize = 512;
|
434 | 9b6eef8a | Paolo Bonzini | break;
|
435 | 89c0f643 | aurel32 | } |
436 | 8869e103 | Paolo Bonzini | |
437 | 8869e103 | Paolo Bonzini | DPRINTF("block size %d\n", s->blocksize);
|
438 | d52affa7 | Gerd Hoffmann | return 0; |
439 | d52affa7 | Gerd Hoffmann | } |
440 | 2cc977e2 | ths | |
441 | 765d1525 | Paolo Bonzini | const SCSIReqOps scsi_generic_req_ops = {
|
442 | 8dbd4574 | Paolo Bonzini | .size = sizeof(SCSIGenericReq),
|
443 | 12010e7b | Paolo Bonzini | .free_req = scsi_free_request, |
444 | 12010e7b | Paolo Bonzini | .send_command = scsi_send_command, |
445 | 12010e7b | Paolo Bonzini | .read_data = scsi_read_data, |
446 | 12010e7b | Paolo Bonzini | .write_data = scsi_write_data, |
447 | 12010e7b | Paolo Bonzini | .cancel_io = scsi_cancel_io, |
448 | 12010e7b | Paolo Bonzini | .get_buf = scsi_get_buf, |
449 | 8dbd4574 | Paolo Bonzini | }; |
450 | 8dbd4574 | Paolo Bonzini | |
451 | 8dbd4574 | Paolo Bonzini | static SCSIRequest *scsi_new_request(SCSIDevice *d, uint32_t tag, uint32_t lun,
|
452 | 63db0f0e | Paolo Bonzini | uint8_t *buf, void *hba_private)
|
453 | 8dbd4574 | Paolo Bonzini | { |
454 | 8dbd4574 | Paolo Bonzini | SCSIRequest *req; |
455 | 8dbd4574 | Paolo Bonzini | |
456 | 8dbd4574 | Paolo Bonzini | req = scsi_req_alloc(&scsi_generic_req_ops, d, tag, lun, hba_private); |
457 | 8dbd4574 | Paolo Bonzini | return req;
|
458 | 8dbd4574 | Paolo Bonzini | } |
459 | 8dbd4574 | Paolo Bonzini | |
460 | d52affa7 | Gerd Hoffmann | static SCSIDeviceInfo scsi_generic_info = {
|
461 | d52affa7 | Gerd Hoffmann | .qdev.name = "scsi-generic",
|
462 | 28b77657 | Paolo Bonzini | .qdev.fw_name = "disk",
|
463 | d52affa7 | Gerd Hoffmann | .qdev.desc = "pass through generic scsi device (/dev/sg*)",
|
464 | 8869e103 | Paolo Bonzini | .qdev.size = sizeof(SCSIDevice),
|
465 | f8b6d672 | Bernhard Kohl | .qdev.reset = scsi_generic_reset, |
466 | d52affa7 | Gerd Hoffmann | .init = scsi_generic_initfn, |
467 | d52affa7 | Gerd Hoffmann | .destroy = scsi_destroy, |
468 | 5c6c0e51 | Hannes Reinecke | .alloc_req = scsi_new_request, |
469 | d52affa7 | Gerd Hoffmann | .qdev.props = (Property[]) { |
470 | 8869e103 | Paolo Bonzini | DEFINE_BLOCK_PROPERTIES(SCSIDevice, conf), |
471 | d52affa7 | Gerd Hoffmann | DEFINE_PROP_END_OF_LIST(), |
472 | d52affa7 | Gerd Hoffmann | }, |
473 | d52affa7 | Gerd Hoffmann | }; |
474 | 2cc977e2 | ths | |
475 | d52affa7 | Gerd Hoffmann | static void scsi_generic_register_devices(void) |
476 | d52affa7 | Gerd Hoffmann | { |
477 | d52affa7 | Gerd Hoffmann | scsi_qdev_register(&scsi_generic_info); |
478 | 2cc977e2 | ths | } |
479 | d52affa7 | Gerd Hoffmann | device_init(scsi_generic_register_devices) |
480 | d52affa7 | Gerd Hoffmann | |
481 | 2cc977e2 | ths | #endif /* __linux__ */ |