ths | 2cc977e | 2007-12-24 16:11:51 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Generic SCSI Device support |
| 3 | * |
| 4 | * Copyright (c) 2007 Bull S.A.S. |
| 5 | * Based on code by Paul Brook |
| 6 | * Based on code by Fabrice Bellard |
| 7 | * |
| 8 | * Written by Laurent Vivier <Laurent.Vivier@bull.net> |
| 9 | * |
Matthew Fernandez | 8e31bf3 | 2011-06-26 12:21:35 +1000 | [diff] [blame] | 10 | * This code is licensed under the LGPL. |
ths | 2cc977e | 2007-12-24 16:11:51 +0000 | [diff] [blame] | 11 | * |
| 12 | */ |
| 13 | |
| 14 | #include "qemu-common.h" |
Markus Armbruster | 2f79201 | 2010-02-18 16:24:31 +0100 | [diff] [blame] | 15 | #include "qemu-error.h" |
Gerd Hoffmann | 43b443b | 2009-10-30 09:54:00 +0100 | [diff] [blame] | 16 | #include "scsi.h" |
Blue Swirl | 2446333 | 2010-08-24 15:22:24 +0000 | [diff] [blame] | 17 | #include "blockdev.h" |
ths | 2cc977e | 2007-12-24 16:11:51 +0000 | [diff] [blame] | 18 | |
Gerd Hoffmann | d52affa | 2009-08-31 14:24:04 +0200 | [diff] [blame] | 19 | #ifdef __linux__ |
ths | 2cc977e | 2007-12-24 16:11:51 +0000 | [diff] [blame] | 20 | |
| 21 | //#define DEBUG_SCSI |
| 22 | |
| 23 | #ifdef DEBUG_SCSI |
Blue Swirl | 001faf3 | 2009-05-13 17:53:17 +0000 | [diff] [blame] | 24 | #define DPRINTF(fmt, ...) \ |
| 25 | do { printf("scsi-generic: " fmt , ## __VA_ARGS__); } while (0) |
ths | 2cc977e | 2007-12-24 16:11:51 +0000 | [diff] [blame] | 26 | #else |
Blue Swirl | 001faf3 | 2009-05-13 17:53:17 +0000 | [diff] [blame] | 27 | #define DPRINTF(fmt, ...) do {} while(0) |
ths | 2cc977e | 2007-12-24 16:11:51 +0000 | [diff] [blame] | 28 | #endif |
| 29 | |
Blue Swirl | 001faf3 | 2009-05-13 17:53:17 +0000 | [diff] [blame] | 30 | #define BADF(fmt, ...) \ |
| 31 | do { fprintf(stderr, "scsi-generic: " fmt , ## __VA_ARGS__); } while (0) |
ths | 2cc977e | 2007-12-24 16:11:51 +0000 | [diff] [blame] | 32 | |
| 33 | #include <stdio.h> |
| 34 | #include <sys/types.h> |
| 35 | #include <sys/stat.h> |
| 36 | #include <unistd.h> |
| 37 | #include <scsi/sg.h> |
Gerd Hoffmann | 0d65e1f | 2009-11-26 15:33:53 +0100 | [diff] [blame] | 38 | #include "scsi-defs.h" |
ths | 2cc977e | 2007-12-24 16:11:51 +0000 | [diff] [blame] | 39 | |
aliguori | a9dd684 | 2008-09-23 13:38:44 +0000 | [diff] [blame] | 40 | #define SCSI_SENSE_BUF_SIZE 96 |
ths | 2cc977e | 2007-12-24 16:11:51 +0000 | [diff] [blame] | 41 | |
| 42 | #define SG_ERR_DRIVER_TIMEOUT 0x06 |
| 43 | #define SG_ERR_DRIVER_SENSE 0x08 |
| 44 | |
| 45 | #ifndef MAX_UINT |
| 46 | #define MAX_UINT ((unsigned int)-1) |
| 47 | #endif |
| 48 | |
Gerd Hoffmann | d52affa | 2009-08-31 14:24:04 +0200 | [diff] [blame] | 49 | typedef struct SCSIGenericState SCSIGenericState; |
| 50 | |
Gerd Hoffmann | 4c41d2e | 2009-11-26 15:33:48 +0100 | [diff] [blame] | 51 | typedef struct SCSIGenericReq { |
| 52 | SCSIRequest req; |
ths | 2cc977e | 2007-12-24 16:11:51 +0000 | [diff] [blame] | 53 | uint8_t *buf; |
| 54 | int buflen; |
| 55 | int len; |
| 56 | sg_io_hdr_t io_header; |
Gerd Hoffmann | 4c41d2e | 2009-11-26 15:33:48 +0100 | [diff] [blame] | 57 | } SCSIGenericReq; |
ths | 2cc977e | 2007-12-24 16:11:51 +0000 | [diff] [blame] | 58 | |
Gerd Hoffmann | d52affa | 2009-08-31 14:24:04 +0200 | [diff] [blame] | 59 | struct SCSIGenericState |
ths | 2cc977e | 2007-12-24 16:11:51 +0000 | [diff] [blame] | 60 | { |
Gerd Hoffmann | d52affa | 2009-08-31 14:24:04 +0200 | [diff] [blame] | 61 | SCSIDevice qdev; |
Christoph Hellwig | 428c149 | 2010-02-10 23:37:09 +0100 | [diff] [blame] | 62 | BlockDriverState *bs; |
ths | 2cc977e | 2007-12-24 16:11:51 +0000 | [diff] [blame] | 63 | }; |
| 64 | |
Paolo Bonzini | ad2d30f | 2011-04-18 16:01:56 +0200 | [diff] [blame] | 65 | static void scsi_free_request(SCSIRequest *req) |
ths | 2cc977e | 2007-12-24 16:11:51 +0000 | [diff] [blame] | 66 | { |
Paolo Bonzini | ad2d30f | 2011-04-18 16:01:56 +0200 | [diff] [blame] | 67 | SCSIGenericReq *r = DO_UPCAST(SCSIGenericReq, req, req); |
| 68 | |
Anthony Liguori | 7267c09 | 2011-08-20 22:09:37 -0500 | [diff] [blame] | 69 | g_free(r->buf); |
ths | 2cc977e | 2007-12-24 16:11:51 +0000 | [diff] [blame] | 70 | } |
| 71 | |
ths | 2cc977e | 2007-12-24 16:11:51 +0000 | [diff] [blame] | 72 | /* Helper function for command completion. */ |
| 73 | static void scsi_command_complete(void *opaque, int ret) |
| 74 | { |
Paolo Bonzini | 682a9b2 | 2011-08-03 10:49:06 +0200 | [diff] [blame] | 75 | int status; |
Gerd Hoffmann | 4c41d2e | 2009-11-26 15:33:48 +0100 | [diff] [blame] | 76 | SCSIGenericReq *r = (SCSIGenericReq *)opaque; |
ths | 2cc977e | 2007-12-24 16:11:51 +0000 | [diff] [blame] | 77 | |
Paolo Bonzini | d33e0ce | 2011-05-25 16:53:46 +0200 | [diff] [blame] | 78 | r->req.aiocb = NULL; |
Paolo Bonzini | b45ef67 | 2011-08-03 10:49:07 +0200 | [diff] [blame] | 79 | if (r->io_header.driver_status & SG_ERR_DRIVER_SENSE) |
| 80 | r->req.sense_len = r->io_header.sb_len_wr; |
aurel32 | 89c0f64 | 2008-10-17 08:08:56 +0000 | [diff] [blame] | 81 | |
Hannes Reinecke | a1f0cce | 2011-04-18 12:53:14 +0200 | [diff] [blame] | 82 | if (ret != 0) { |
| 83 | switch (ret) { |
Paolo Bonzini | 2e7cc4d | 2011-04-18 14:29:16 +0200 | [diff] [blame] | 84 | case -EDOM: |
Paolo Bonzini | 682a9b2 | 2011-08-03 10:49:06 +0200 | [diff] [blame] | 85 | status = TASK_SET_FULL; |
Paolo Bonzini | 2e7cc4d | 2011-04-18 14:29:16 +0200 | [diff] [blame] | 86 | break; |
Hannes Reinecke | a1f0cce | 2011-04-18 12:53:14 +0200 | [diff] [blame] | 87 | case -ENOMEM: |
Paolo Bonzini | 682a9b2 | 2011-08-03 10:49:06 +0200 | [diff] [blame] | 88 | status = CHECK_CONDITION; |
Paolo Bonzini | b45ef67 | 2011-08-03 10:49:07 +0200 | [diff] [blame] | 89 | scsi_req_build_sense(&r->req, SENSE_CODE(TARGET_FAILURE)); |
Hannes Reinecke | a1f0cce | 2011-04-18 12:53:14 +0200 | [diff] [blame] | 90 | break; |
| 91 | default: |
Paolo Bonzini | 682a9b2 | 2011-08-03 10:49:06 +0200 | [diff] [blame] | 92 | status = CHECK_CONDITION; |
Paolo Bonzini | b45ef67 | 2011-08-03 10:49:07 +0200 | [diff] [blame] | 93 | scsi_req_build_sense(&r->req, SENSE_CODE(IO_ERROR)); |
Hannes Reinecke | a1f0cce | 2011-04-18 12:53:14 +0200 | [diff] [blame] | 94 | break; |
| 95 | } |
| 96 | } else { |
Paolo Bonzini | b45ef67 | 2011-08-03 10:49:07 +0200 | [diff] [blame] | 97 | if (r->io_header.driver_status & SG_ERR_DRIVER_TIMEOUT) { |
Paolo Bonzini | 682a9b2 | 2011-08-03 10:49:06 +0200 | [diff] [blame] | 98 | status = BUSY; |
ths | 2cc977e | 2007-12-24 16:11:51 +0000 | [diff] [blame] | 99 | BADF("Driver Timeout\n"); |
Paolo Bonzini | 682a9b2 | 2011-08-03 10:49:06 +0200 | [diff] [blame] | 100 | } else if (r->io_header.status) { |
| 101 | status = r->io_header.status; |
Paolo Bonzini | b45ef67 | 2011-08-03 10:49:07 +0200 | [diff] [blame] | 102 | } else if (r->io_header.driver_status & SG_ERR_DRIVER_SENSE) { |
Paolo Bonzini | 682a9b2 | 2011-08-03 10:49:06 +0200 | [diff] [blame] | 103 | status = CHECK_CONDITION; |
| 104 | } else { |
| 105 | status = GOOD; |
| 106 | } |
ths | 2cc977e | 2007-12-24 16:11:51 +0000 | [diff] [blame] | 107 | } |
aurel32 | 89c0f64 | 2008-10-17 08:08:56 +0000 | [diff] [blame] | 108 | DPRINTF("Command complete 0x%p tag=0x%x status=%d\n", |
Paolo Bonzini | 682a9b2 | 2011-08-03 10:49:06 +0200 | [diff] [blame] | 109 | r, r->req.tag, status); |
Gerd Hoffmann | ed3a34a | 2009-11-26 15:34:00 +0100 | [diff] [blame] | 110 | |
Paolo Bonzini | 682a9b2 | 2011-08-03 10:49:06 +0200 | [diff] [blame] | 111 | scsi_req_complete(&r->req, status); |
ths | 2cc977e | 2007-12-24 16:11:51 +0000 | [diff] [blame] | 112 | } |
| 113 | |
| 114 | /* Cancel a pending data transfer. */ |
Hannes Reinecke | 5c6c0e5 | 2011-04-18 12:35:39 +0200 | [diff] [blame] | 115 | static void scsi_cancel_io(SCSIRequest *req) |
ths | 2cc977e | 2007-12-24 16:11:51 +0000 | [diff] [blame] | 116 | { |
Hannes Reinecke | 5c6c0e5 | 2011-04-18 12:35:39 +0200 | [diff] [blame] | 117 | SCSIGenericReq *r = DO_UPCAST(SCSIGenericReq, req, req); |
| 118 | |
| 119 | DPRINTF("Cancel tag=0x%x\n", req->tag); |
| 120 | if (r->req.aiocb) { |
| 121 | bdrv_aio_cancel(r->req.aiocb); |
ths | 2cc977e | 2007-12-24 16:11:51 +0000 | [diff] [blame] | 122 | } |
Hannes Reinecke | 5c6c0e5 | 2011-04-18 12:35:39 +0200 | [diff] [blame] | 123 | r->req.aiocb = NULL; |
ths | 2cc977e | 2007-12-24 16:11:51 +0000 | [diff] [blame] | 124 | } |
| 125 | |
| 126 | static int execute_command(BlockDriverState *bdrv, |
Gerd Hoffmann | 4c41d2e | 2009-11-26 15:33:48 +0100 | [diff] [blame] | 127 | SCSIGenericReq *r, int direction, |
ths | 2cc977e | 2007-12-24 16:11:51 +0000 | [diff] [blame] | 128 | BlockDriverCompletionFunc *complete) |
| 129 | { |
ths | 2cc977e | 2007-12-24 16:11:51 +0000 | [diff] [blame] | 130 | r->io_header.interface_id = 'S'; |
| 131 | r->io_header.dxfer_direction = direction; |
| 132 | r->io_header.dxferp = r->buf; |
| 133 | r->io_header.dxfer_len = r->buflen; |
Gerd Hoffmann | 29362eb | 2009-11-26 15:33:51 +0100 | [diff] [blame] | 134 | r->io_header.cmdp = r->req.cmd.buf; |
| 135 | r->io_header.cmd_len = r->req.cmd.len; |
Paolo Bonzini | b45ef67 | 2011-08-03 10:49:07 +0200 | [diff] [blame] | 136 | r->io_header.mx_sb_len = sizeof(r->req.sense); |
| 137 | r->io_header.sbp = r->req.sense; |
ths | 2cc977e | 2007-12-24 16:11:51 +0000 | [diff] [blame] | 138 | r->io_header.timeout = MAX_UINT; |
| 139 | r->io_header.usr_ptr = r; |
| 140 | r->io_header.flags |= SG_FLAG_DIRECT_IO; |
| 141 | |
Gerd Hoffmann | 4c41d2e | 2009-11-26 15:33:48 +0100 | [diff] [blame] | 142 | r->req.aiocb = bdrv_aio_ioctl(bdrv, SG_IO, &r->io_header, complete, r); |
| 143 | if (r->req.aiocb == NULL) { |
ths | 2cc977e | 2007-12-24 16:11:51 +0000 | [diff] [blame] | 144 | BADF("execute_command: read failed !\n"); |
Hannes Reinecke | a1f0cce | 2011-04-18 12:53:14 +0200 | [diff] [blame] | 145 | return -ENOMEM; |
ths | 2cc977e | 2007-12-24 16:11:51 +0000 | [diff] [blame] | 146 | } |
| 147 | |
| 148 | return 0; |
| 149 | } |
| 150 | |
| 151 | static void scsi_read_complete(void * opaque, int ret) |
| 152 | { |
Gerd Hoffmann | 4c41d2e | 2009-11-26 15:33:48 +0100 | [diff] [blame] | 153 | SCSIGenericReq *r = (SCSIGenericReq *)opaque; |
ths | 2cc977e | 2007-12-24 16:11:51 +0000 | [diff] [blame] | 154 | int len; |
| 155 | |
Paolo Bonzini | d33e0ce | 2011-05-25 16:53:46 +0200 | [diff] [blame] | 156 | r->req.aiocb = NULL; |
ths | 2cc977e | 2007-12-24 16:11:51 +0000 | [diff] [blame] | 157 | if (ret) { |
Bernhard Kohl | aa2b1e8 | 2010-09-01 16:33:21 +0200 | [diff] [blame] | 158 | DPRINTF("IO error ret %d\n", ret); |
ths | 2cc977e | 2007-12-24 16:11:51 +0000 | [diff] [blame] | 159 | scsi_command_complete(r, ret); |
| 160 | return; |
| 161 | } |
| 162 | len = r->io_header.dxfer_len - r->io_header.resid; |
Gerd Hoffmann | 4c41d2e | 2009-11-26 15:33:48 +0100 | [diff] [blame] | 163 | DPRINTF("Data ready tag=0x%x len=%d\n", r->req.tag, len); |
ths | 2cc977e | 2007-12-24 16:11:51 +0000 | [diff] [blame] | 164 | |
| 165 | r->len = -1; |
Paolo Bonzini | 40f16dd | 2011-05-03 14:15:59 +0200 | [diff] [blame] | 166 | if (len == 0) { |
aurel32 | 89c0f64 | 2008-10-17 08:08:56 +0000 | [diff] [blame] | 167 | scsi_command_complete(r, 0); |
Paolo Bonzini | 40f16dd | 2011-05-03 14:15:59 +0200 | [diff] [blame] | 168 | } else { |
Paolo Bonzini | ab9adc8 | 2011-04-18 14:59:13 +0200 | [diff] [blame] | 169 | scsi_req_data(&r->req, len); |
Paolo Bonzini | 40f16dd | 2011-05-03 14:15:59 +0200 | [diff] [blame] | 170 | } |
ths | 2cc977e | 2007-12-24 16:11:51 +0000 | [diff] [blame] | 171 | } |
| 172 | |
| 173 | /* Read more data from scsi device into buffer. */ |
Hannes Reinecke | 5c6c0e5 | 2011-04-18 12:35:39 +0200 | [diff] [blame] | 174 | static void scsi_read_data(SCSIRequest *req) |
ths | 2cc977e | 2007-12-24 16:11:51 +0000 | [diff] [blame] | 175 | { |
Hannes Reinecke | 5c6c0e5 | 2011-04-18 12:35:39 +0200 | [diff] [blame] | 176 | SCSIGenericReq *r = DO_UPCAST(SCSIGenericReq, req, req); |
| 177 | SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev, r->req.dev); |
ths | 2cc977e | 2007-12-24 16:11:51 +0000 | [diff] [blame] | 178 | int ret; |
| 179 | |
Hannes Reinecke | 5c6c0e5 | 2011-04-18 12:35:39 +0200 | [diff] [blame] | 180 | DPRINTF("scsi_read_data 0x%x\n", req->tag); |
ths | 2cc977e | 2007-12-24 16:11:51 +0000 | [diff] [blame] | 181 | if (r->len == -1) { |
| 182 | scsi_command_complete(r, 0); |
| 183 | return; |
| 184 | } |
| 185 | |
Christoph Hellwig | 428c149 | 2010-02-10 23:37:09 +0100 | [diff] [blame] | 186 | ret = execute_command(s->bs, r, SG_DXFER_FROM_DEV, scsi_read_complete); |
Hannes Reinecke | a1f0cce | 2011-04-18 12:53:14 +0200 | [diff] [blame] | 187 | if (ret < 0) { |
| 188 | scsi_command_complete(r, ret); |
ths | 2cc977e | 2007-12-24 16:11:51 +0000 | [diff] [blame] | 189 | return; |
| 190 | } |
| 191 | } |
| 192 | |
| 193 | static void scsi_write_complete(void * opaque, int ret) |
| 194 | { |
Gerd Hoffmann | 4c41d2e | 2009-11-26 15:33:48 +0100 | [diff] [blame] | 195 | SCSIGenericReq *r = (SCSIGenericReq *)opaque; |
| 196 | SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev, r->req.dev); |
ths | 2cc977e | 2007-12-24 16:11:51 +0000 | [diff] [blame] | 197 | |
| 198 | DPRINTF("scsi_write_complete() ret = %d\n", ret); |
Paolo Bonzini | d33e0ce | 2011-05-25 16:53:46 +0200 | [diff] [blame] | 199 | r->req.aiocb = NULL; |
ths | 2cc977e | 2007-12-24 16:11:51 +0000 | [diff] [blame] | 200 | if (ret) { |
| 201 | DPRINTF("IO error\n"); |
| 202 | scsi_command_complete(r, ret); |
| 203 | return; |
| 204 | } |
| 205 | |
Gerd Hoffmann | 29362eb | 2009-11-26 15:33:51 +0100 | [diff] [blame] | 206 | if (r->req.cmd.buf[0] == MODE_SELECT && r->req.cmd.buf[4] == 12 && |
Gerd Hoffmann | 9137665 | 2009-11-26 15:33:54 +0100 | [diff] [blame] | 207 | s->qdev.type == TYPE_TAPE) { |
Gerd Hoffmann | b07995e | 2009-11-26 15:33:52 +0100 | [diff] [blame] | 208 | s->qdev.blocksize = (r->buf[9] << 16) | (r->buf[10] << 8) | r->buf[11]; |
Bernhard Kohl | aa2b1e8 | 2010-09-01 16:33:21 +0200 | [diff] [blame] | 209 | DPRINTF("block size %d\n", s->qdev.blocksize); |
aurel32 | 89c0f64 | 2008-10-17 08:08:56 +0000 | [diff] [blame] | 210 | } |
| 211 | |
ths | 2cc977e | 2007-12-24 16:11:51 +0000 | [diff] [blame] | 212 | scsi_command_complete(r, ret); |
| 213 | } |
| 214 | |
| 215 | /* Write data to a scsi device. Returns nonzero on failure. |
| 216 | The transfer may complete asynchronously. */ |
Paolo Bonzini | 4274121 | 2011-04-22 09:39:16 +0200 | [diff] [blame] | 217 | static void scsi_write_data(SCSIRequest *req) |
ths | 2cc977e | 2007-12-24 16:11:51 +0000 | [diff] [blame] | 218 | { |
Hannes Reinecke | 5c6c0e5 | 2011-04-18 12:35:39 +0200 | [diff] [blame] | 219 | SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev, req->dev); |
| 220 | SCSIGenericReq *r = DO_UPCAST(SCSIGenericReq, req, req); |
ths | 2cc977e | 2007-12-24 16:11:51 +0000 | [diff] [blame] | 221 | int ret; |
| 222 | |
Hannes Reinecke | 5c6c0e5 | 2011-04-18 12:35:39 +0200 | [diff] [blame] | 223 | DPRINTF("scsi_write_data 0x%x\n", req->tag); |
ths | 2cc977e | 2007-12-24 16:11:51 +0000 | [diff] [blame] | 224 | if (r->len == 0) { |
| 225 | r->len = r->buflen; |
Paolo Bonzini | ab9adc8 | 2011-04-18 14:59:13 +0200 | [diff] [blame] | 226 | scsi_req_data(&r->req, r->len); |
Paolo Bonzini | 4274121 | 2011-04-22 09:39:16 +0200 | [diff] [blame] | 227 | return; |
ths | 2cc977e | 2007-12-24 16:11:51 +0000 | [diff] [blame] | 228 | } |
| 229 | |
Christoph Hellwig | 428c149 | 2010-02-10 23:37:09 +0100 | [diff] [blame] | 230 | ret = execute_command(s->bs, r, SG_DXFER_TO_DEV, scsi_write_complete); |
Hannes Reinecke | a1f0cce | 2011-04-18 12:53:14 +0200 | [diff] [blame] | 231 | if (ret < 0) { |
| 232 | scsi_command_complete(r, ret); |
ths | 2cc977e | 2007-12-24 16:11:51 +0000 | [diff] [blame] | 233 | } |
ths | 2cc977e | 2007-12-24 16:11:51 +0000 | [diff] [blame] | 234 | } |
| 235 | |
| 236 | /* Return a pointer to the data buffer. */ |
Hannes Reinecke | 5c6c0e5 | 2011-04-18 12:35:39 +0200 | [diff] [blame] | 237 | static uint8_t *scsi_get_buf(SCSIRequest *req) |
ths | 2cc977e | 2007-12-24 16:11:51 +0000 | [diff] [blame] | 238 | { |
Hannes Reinecke | 5c6c0e5 | 2011-04-18 12:35:39 +0200 | [diff] [blame] | 239 | SCSIGenericReq *r = DO_UPCAST(SCSIGenericReq, req, req); |
| 240 | |
ths | 2cc977e | 2007-12-24 16:11:51 +0000 | [diff] [blame] | 241 | return r->buf; |
| 242 | } |
| 243 | |
Gerd Hoffmann | 2ec749c | 2009-11-26 15:33:55 +0100 | [diff] [blame] | 244 | static void scsi_req_fixup(SCSIRequest *req) |
ths | 2cc977e | 2007-12-24 16:11:51 +0000 | [diff] [blame] | 245 | { |
Gerd Hoffmann | 2ec749c | 2009-11-26 15:33:55 +0100 | [diff] [blame] | 246 | switch(req->cmd.buf[0]) { |
ths | 2cc977e | 2007-12-24 16:11:51 +0000 | [diff] [blame] | 247 | case WRITE_10: |
Gerd Hoffmann | 2ec749c | 2009-11-26 15:33:55 +0100 | [diff] [blame] | 248 | req->cmd.buf[1] &= ~0x08; /* disable FUA */ |
ths | 2cc977e | 2007-12-24 16:11:51 +0000 | [diff] [blame] | 249 | break; |
| 250 | case READ_10: |
Gerd Hoffmann | 2ec749c | 2009-11-26 15:33:55 +0100 | [diff] [blame] | 251 | req->cmd.buf[1] &= ~0x08; /* disable FUA */ |
aliguori | a9dd684 | 2008-09-23 13:38:44 +0000 | [diff] [blame] | 252 | break; |
| 253 | case REWIND: |
| 254 | case START_STOP: |
Gerd Hoffmann | 2ec749c | 2009-11-26 15:33:55 +0100 | [diff] [blame] | 255 | if (req->dev->type == TYPE_TAPE) { |
| 256 | /* force IMMED, otherwise qemu waits end of command */ |
| 257 | req->cmd.buf[1] = 0x01; |
| 258 | } |
aliguori | a9dd684 | 2008-09-23 13:38:44 +0000 | [diff] [blame] | 259 | break; |
aliguori | a9dd684 | 2008-09-23 13:38:44 +0000 | [diff] [blame] | 260 | } |
aliguori | a9dd684 | 2008-09-23 13:38:44 +0000 | [diff] [blame] | 261 | } |
| 262 | |
ths | 2cc977e | 2007-12-24 16:11:51 +0000 | [diff] [blame] | 263 | /* Execute a scsi command. Returns the length of the data expected by the |
| 264 | command. This will be Positive for data transfers from the device |
| 265 | (eg. disk reads), negative for transfers to the device (eg. disk writes), |
| 266 | and zero if the command does not transfer any data. */ |
| 267 | |
Hannes Reinecke | 5c6c0e5 | 2011-04-18 12:35:39 +0200 | [diff] [blame] | 268 | static int32_t scsi_send_command(SCSIRequest *req, uint8_t *cmd) |
ths | 2cc977e | 2007-12-24 16:11:51 +0000 | [diff] [blame] | 269 | { |
Hannes Reinecke | 5c6c0e5 | 2011-04-18 12:35:39 +0200 | [diff] [blame] | 270 | SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev, req->dev); |
| 271 | SCSIGenericReq *r = DO_UPCAST(SCSIGenericReq, req, req); |
ths | 2cc977e | 2007-12-24 16:11:51 +0000 | [diff] [blame] | 272 | int ret; |
| 273 | |
Gerd Hoffmann | 2ec749c | 2009-11-26 15:33:55 +0100 | [diff] [blame] | 274 | scsi_req_fixup(&r->req); |
ths | 2cc977e | 2007-12-24 16:11:51 +0000 | [diff] [blame] | 275 | |
Bernhard Kohl | aa2b1e8 | 2010-09-01 16:33:21 +0200 | [diff] [blame] | 276 | DPRINTF("Command: lun=%d tag=0x%x len %zd data=0x%02x", lun, tag, |
| 277 | r->req.cmd.xfer, cmd[0]); |
| 278 | |
| 279 | #ifdef DEBUG_SCSI |
| 280 | { |
| 281 | int i; |
| 282 | for (i = 1; i < r->req.cmd.len; i++) { |
| 283 | printf(" 0x%02x", cmd[i]); |
| 284 | } |
| 285 | printf("\n"); |
| 286 | } |
| 287 | #endif |
Gerd Hoffmann | 2ec749c | 2009-11-26 15:33:55 +0100 | [diff] [blame] | 288 | |
| 289 | if (r->req.cmd.xfer == 0) { |
ths | 2cc977e | 2007-12-24 16:11:51 +0000 | [diff] [blame] | 290 | if (r->buf != NULL) |
Anthony Liguori | 7267c09 | 2011-08-20 22:09:37 -0500 | [diff] [blame] | 291 | g_free(r->buf); |
ths | 2cc977e | 2007-12-24 16:11:51 +0000 | [diff] [blame] | 292 | r->buflen = 0; |
| 293 | r->buf = NULL; |
Christoph Hellwig | 428c149 | 2010-02-10 23:37:09 +0100 | [diff] [blame] | 294 | ret = execute_command(s->bs, r, SG_DXFER_NONE, scsi_command_complete); |
Hannes Reinecke | a1f0cce | 2011-04-18 12:53:14 +0200 | [diff] [blame] | 295 | if (ret < 0) { |
| 296 | scsi_command_complete(r, ret); |
| 297 | return 0; |
ths | 2cc977e | 2007-12-24 16:11:51 +0000 | [diff] [blame] | 298 | } |
| 299 | return 0; |
| 300 | } |
| 301 | |
Gerd Hoffmann | 2ec749c | 2009-11-26 15:33:55 +0100 | [diff] [blame] | 302 | if (r->buflen != r->req.cmd.xfer) { |
ths | 2cc977e | 2007-12-24 16:11:51 +0000 | [diff] [blame] | 303 | if (r->buf != NULL) |
Anthony Liguori | 7267c09 | 2011-08-20 22:09:37 -0500 | [diff] [blame] | 304 | g_free(r->buf); |
| 305 | r->buf = g_malloc(r->req.cmd.xfer); |
Gerd Hoffmann | 2ec749c | 2009-11-26 15:33:55 +0100 | [diff] [blame] | 306 | r->buflen = r->req.cmd.xfer; |
ths | 2cc977e | 2007-12-24 16:11:51 +0000 | [diff] [blame] | 307 | } |
| 308 | |
| 309 | memset(r->buf, 0, r->buflen); |
Gerd Hoffmann | 2ec749c | 2009-11-26 15:33:55 +0100 | [diff] [blame] | 310 | r->len = r->req.cmd.xfer; |
Gerd Hoffmann | 97a0643 | 2009-11-26 15:33:57 +0100 | [diff] [blame] | 311 | if (r->req.cmd.mode == SCSI_XFER_TO_DEV) { |
ths | 2cc977e | 2007-12-24 16:11:51 +0000 | [diff] [blame] | 312 | r->len = 0; |
Hannes Reinecke | 5c6c0e5 | 2011-04-18 12:35:39 +0200 | [diff] [blame] | 313 | return -r->req.cmd.xfer; |
Paolo Bonzini | ad2d30f | 2011-04-18 16:01:56 +0200 | [diff] [blame] | 314 | } else { |
Hannes Reinecke | 5c6c0e5 | 2011-04-18 12:35:39 +0200 | [diff] [blame] | 315 | return r->req.cmd.xfer; |
ths | 2cc977e | 2007-12-24 16:11:51 +0000 | [diff] [blame] | 316 | } |
ths | 2cc977e | 2007-12-24 16:11:51 +0000 | [diff] [blame] | 317 | } |
| 318 | |
| 319 | static int get_blocksize(BlockDriverState *bdrv) |
| 320 | { |
| 321 | uint8_t cmd[10]; |
| 322 | uint8_t buf[8]; |
| 323 | uint8_t sensebuf[8]; |
| 324 | sg_io_hdr_t io_header; |
| 325 | int ret; |
| 326 | |
aliguori | 4f26a48 | 2008-09-22 15:27:54 +0000 | [diff] [blame] | 327 | memset(cmd, 0, sizeof(cmd)); |
| 328 | memset(buf, 0, sizeof(buf)); |
Hannes Reinecke | 5e30a07 | 2011-07-22 16:51:15 +0200 | [diff] [blame] | 329 | cmd[0] = READ_CAPACITY_10; |
ths | 2cc977e | 2007-12-24 16:11:51 +0000 | [diff] [blame] | 330 | |
| 331 | memset(&io_header, 0, sizeof(io_header)); |
| 332 | io_header.interface_id = 'S'; |
| 333 | io_header.dxfer_direction = SG_DXFER_FROM_DEV; |
| 334 | io_header.dxfer_len = sizeof(buf); |
| 335 | io_header.dxferp = buf; |
| 336 | io_header.cmdp = cmd; |
| 337 | io_header.cmd_len = sizeof(cmd); |
| 338 | io_header.mx_sb_len = sizeof(sensebuf); |
| 339 | io_header.sbp = sensebuf; |
| 340 | io_header.timeout = 6000; /* XXX */ |
| 341 | |
aliguori | 221f715 | 2009-03-28 17:28:41 +0000 | [diff] [blame] | 342 | ret = bdrv_ioctl(bdrv, SG_IO, &io_header); |
aliguori | 7d78066 | 2009-03-12 19:57:08 +0000 | [diff] [blame] | 343 | if (ret < 0) |
ths | 2cc977e | 2007-12-24 16:11:51 +0000 | [diff] [blame] | 344 | return -1; |
| 345 | |
| 346 | return (buf[4] << 24) | (buf[5] << 16) | (buf[6] << 8) | buf[7]; |
| 347 | } |
| 348 | |
aurel32 | 89c0f64 | 2008-10-17 08:08:56 +0000 | [diff] [blame] | 349 | static int get_stream_blocksize(BlockDriverState *bdrv) |
| 350 | { |
| 351 | uint8_t cmd[6]; |
| 352 | uint8_t buf[12]; |
| 353 | uint8_t sensebuf[8]; |
| 354 | sg_io_hdr_t io_header; |
| 355 | int ret; |
| 356 | |
| 357 | memset(cmd, 0, sizeof(cmd)); |
| 358 | memset(buf, 0, sizeof(buf)); |
| 359 | cmd[0] = MODE_SENSE; |
| 360 | cmd[4] = sizeof(buf); |
| 361 | |
| 362 | memset(&io_header, 0, sizeof(io_header)); |
| 363 | io_header.interface_id = 'S'; |
| 364 | io_header.dxfer_direction = SG_DXFER_FROM_DEV; |
| 365 | io_header.dxfer_len = sizeof(buf); |
| 366 | io_header.dxferp = buf; |
| 367 | io_header.cmdp = cmd; |
| 368 | io_header.cmd_len = sizeof(cmd); |
| 369 | io_header.mx_sb_len = sizeof(sensebuf); |
| 370 | io_header.sbp = sensebuf; |
| 371 | io_header.timeout = 6000; /* XXX */ |
| 372 | |
aliguori | 221f715 | 2009-03-28 17:28:41 +0000 | [diff] [blame] | 373 | ret = bdrv_ioctl(bdrv, SG_IO, &io_header); |
aliguori | 7d78066 | 2009-03-12 19:57:08 +0000 | [diff] [blame] | 374 | if (ret < 0) |
aurel32 | 89c0f64 | 2008-10-17 08:08:56 +0000 | [diff] [blame] | 375 | return -1; |
| 376 | |
| 377 | return (buf[9] << 16) | (buf[10] << 8) | buf[11]; |
| 378 | } |
| 379 | |
Bernhard Kohl | f8b6d67 | 2010-09-06 16:07:33 +0200 | [diff] [blame] | 380 | static void scsi_generic_reset(DeviceState *dev) |
| 381 | { |
| 382 | SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev.qdev, dev); |
| 383 | |
Paolo Bonzini | c7b4887 | 2011-08-03 10:49:18 +0200 | [diff] [blame] | 384 | scsi_device_purge_requests(&s->qdev, SENSE_CODE(RESET)); |
Bernhard Kohl | f8b6d67 | 2010-09-06 16:07:33 +0200 | [diff] [blame] | 385 | } |
| 386 | |
| 387 | static void scsi_destroy(SCSIDevice *d) |
| 388 | { |
| 389 | SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev, d); |
| 390 | |
Paolo Bonzini | c7b4887 | 2011-08-03 10:49:18 +0200 | [diff] [blame] | 391 | scsi_device_purge_requests(&s->qdev, SENSE_CODE(NO_SENSE)); |
Markus Armbruster | f8b6cc0 | 2010-05-05 16:36:52 +0200 | [diff] [blame] | 392 | blockdev_mark_auto_del(s->qdev.conf.bs); |
ths | 2cc977e | 2007-12-24 16:11:51 +0000 | [diff] [blame] | 393 | } |
| 394 | |
Gerd Hoffmann | d52affa | 2009-08-31 14:24:04 +0200 | [diff] [blame] | 395 | static int scsi_generic_initfn(SCSIDevice *dev) |
ths | 2cc977e | 2007-12-24 16:11:51 +0000 | [diff] [blame] | 396 | { |
Gerd Hoffmann | d52affa | 2009-08-31 14:24:04 +0200 | [diff] [blame] | 397 | SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev, dev); |
ths | 2cc977e | 2007-12-24 16:11:51 +0000 | [diff] [blame] | 398 | int sg_version; |
ths | 2cc977e | 2007-12-24 16:11:51 +0000 | [diff] [blame] | 399 | struct sg_scsi_id scsiid; |
| 400 | |
Markus Armbruster | f8b6cc0 | 2010-05-05 16:36:52 +0200 | [diff] [blame] | 401 | if (!s->qdev.conf.bs) { |
Markus Armbruster | 1ecda02 | 2010-02-18 17:25:24 +0100 | [diff] [blame] | 402 | error_report("scsi-generic: drive property not set"); |
Gerd Hoffmann | d52affa | 2009-08-31 14:24:04 +0200 | [diff] [blame] | 403 | return -1; |
| 404 | } |
Markus Armbruster | f8b6cc0 | 2010-05-05 16:36:52 +0200 | [diff] [blame] | 405 | s->bs = s->qdev.conf.bs; |
ths | 2cc977e | 2007-12-24 16:11:51 +0000 | [diff] [blame] | 406 | |
Gerd Hoffmann | d52affa | 2009-08-31 14:24:04 +0200 | [diff] [blame] | 407 | /* check we are really using a /dev/sg* file */ |
Christoph Hellwig | 428c149 | 2010-02-10 23:37:09 +0100 | [diff] [blame] | 408 | if (!bdrv_is_sg(s->bs)) { |
Markus Armbruster | 1ecda02 | 2010-02-18 17:25:24 +0100 | [diff] [blame] | 409 | error_report("scsi-generic: not /dev/sg*"); |
Gerd Hoffmann | d52affa | 2009-08-31 14:24:04 +0200 | [diff] [blame] | 410 | return -1; |
| 411 | } |
ths | 2cc977e | 2007-12-24 16:11:51 +0000 | [diff] [blame] | 412 | |
Markus Armbruster | 620f862 | 2010-05-27 20:02:28 +0200 | [diff] [blame] | 413 | if (bdrv_get_on_error(s->bs, 0) != BLOCK_ERR_STOP_ENOSPC) { |
| 414 | error_report("Device doesn't support drive option werror"); |
| 415 | return -1; |
| 416 | } |
| 417 | if (bdrv_get_on_error(s->bs, 1) != BLOCK_ERR_REPORT) { |
| 418 | error_report("Device doesn't support drive option rerror"); |
| 419 | return -1; |
| 420 | } |
| 421 | |
ths | 2cc977e | 2007-12-24 16:11:51 +0000 | [diff] [blame] | 422 | /* check we are using a driver managing SG_IO (version 3 and after */ |
Christoph Hellwig | 428c149 | 2010-02-10 23:37:09 +0100 | [diff] [blame] | 423 | if (bdrv_ioctl(s->bs, SG_GET_VERSION_NUM, &sg_version) < 0 || |
Gerd Hoffmann | d52affa | 2009-08-31 14:24:04 +0200 | [diff] [blame] | 424 | sg_version < 30000) { |
Markus Armbruster | 1ecda02 | 2010-02-18 17:25:24 +0100 | [diff] [blame] | 425 | error_report("scsi-generic: scsi generic interface too old"); |
Gerd Hoffmann | d52affa | 2009-08-31 14:24:04 +0200 | [diff] [blame] | 426 | return -1; |
| 427 | } |
ths | 2cc977e | 2007-12-24 16:11:51 +0000 | [diff] [blame] | 428 | |
| 429 | /* get LUN of the /dev/sg? */ |
Christoph Hellwig | 428c149 | 2010-02-10 23:37:09 +0100 | [diff] [blame] | 430 | if (bdrv_ioctl(s->bs, SG_GET_SCSI_ID, &scsiid)) { |
Markus Armbruster | 1ecda02 | 2010-02-18 17:25:24 +0100 | [diff] [blame] | 431 | error_report("scsi-generic: SG_GET_SCSI_ID ioctl failed"); |
Gerd Hoffmann | d52affa | 2009-08-31 14:24:04 +0200 | [diff] [blame] | 432 | return -1; |
| 433 | } |
ths | 2cc977e | 2007-12-24 16:11:51 +0000 | [diff] [blame] | 434 | |
| 435 | /* define device state */ |
Gerd Hoffmann | 9137665 | 2009-11-26 15:33:54 +0100 | [diff] [blame] | 436 | s->qdev.type = scsiid.scsi_type; |
| 437 | DPRINTF("device type %d\n", s->qdev.type); |
| 438 | if (s->qdev.type == TYPE_TAPE) { |
Christoph Hellwig | 428c149 | 2010-02-10 23:37:09 +0100 | [diff] [blame] | 439 | s->qdev.blocksize = get_stream_blocksize(s->bs); |
Gerd Hoffmann | b07995e | 2009-11-26 15:33:52 +0100 | [diff] [blame] | 440 | if (s->qdev.blocksize == -1) |
| 441 | s->qdev.blocksize = 0; |
aurel32 | 89c0f64 | 2008-10-17 08:08:56 +0000 | [diff] [blame] | 442 | } else { |
Christoph Hellwig | 428c149 | 2010-02-10 23:37:09 +0100 | [diff] [blame] | 443 | s->qdev.blocksize = get_blocksize(s->bs); |
aurel32 | 89c0f64 | 2008-10-17 08:08:56 +0000 | [diff] [blame] | 444 | /* removable media returns 0 if not present */ |
Gerd Hoffmann | b07995e | 2009-11-26 15:33:52 +0100 | [diff] [blame] | 445 | if (s->qdev.blocksize <= 0) { |
Gerd Hoffmann | 9137665 | 2009-11-26 15:33:54 +0100 | [diff] [blame] | 446 | if (s->qdev.type == TYPE_ROM || s->qdev.type == TYPE_WORM) |
Gerd Hoffmann | b07995e | 2009-11-26 15:33:52 +0100 | [diff] [blame] | 447 | s->qdev.blocksize = 2048; |
aurel32 | 89c0f64 | 2008-10-17 08:08:56 +0000 | [diff] [blame] | 448 | else |
Gerd Hoffmann | b07995e | 2009-11-26 15:33:52 +0100 | [diff] [blame] | 449 | s->qdev.blocksize = 512; |
aurel32 | 89c0f64 | 2008-10-17 08:08:56 +0000 | [diff] [blame] | 450 | } |
| 451 | } |
Gerd Hoffmann | b07995e | 2009-11-26 15:33:52 +0100 | [diff] [blame] | 452 | DPRINTF("block size %d\n", s->qdev.blocksize); |
Markus Armbruster | 7d0d695 | 2010-06-25 13:42:14 +0200 | [diff] [blame] | 453 | bdrv_set_removable(s->bs, 0); |
Gerd Hoffmann | d52affa | 2009-08-31 14:24:04 +0200 | [diff] [blame] | 454 | return 0; |
ths | 2cc977e | 2007-12-24 16:11:51 +0000 | [diff] [blame] | 455 | } |
Gerd Hoffmann | d52affa | 2009-08-31 14:24:04 +0200 | [diff] [blame] | 456 | |
Paolo Bonzini | 8dbd457 | 2011-08-03 10:49:08 +0200 | [diff] [blame] | 457 | static SCSIReqOps scsi_generic_req_ops = { |
| 458 | .size = sizeof(SCSIGenericReq), |
Paolo Bonzini | 12010e7 | 2011-08-03 10:49:09 +0200 | [diff] [blame] | 459 | .free_req = scsi_free_request, |
| 460 | .send_command = scsi_send_command, |
| 461 | .read_data = scsi_read_data, |
| 462 | .write_data = scsi_write_data, |
| 463 | .cancel_io = scsi_cancel_io, |
| 464 | .get_buf = scsi_get_buf, |
Paolo Bonzini | 8dbd457 | 2011-08-03 10:49:08 +0200 | [diff] [blame] | 465 | }; |
| 466 | |
| 467 | static SCSIRequest *scsi_new_request(SCSIDevice *d, uint32_t tag, uint32_t lun, |
| 468 | void *hba_private) |
| 469 | { |
| 470 | SCSIRequest *req; |
| 471 | |
| 472 | req = scsi_req_alloc(&scsi_generic_req_ops, d, tag, lun, hba_private); |
| 473 | return req; |
| 474 | } |
| 475 | |
Gerd Hoffmann | d52affa | 2009-08-31 14:24:04 +0200 | [diff] [blame] | 476 | static SCSIDeviceInfo scsi_generic_info = { |
| 477 | .qdev.name = "scsi-generic", |
| 478 | .qdev.desc = "pass through generic scsi device (/dev/sg*)", |
| 479 | .qdev.size = sizeof(SCSIGenericState), |
Bernhard Kohl | f8b6d67 | 2010-09-06 16:07:33 +0200 | [diff] [blame] | 480 | .qdev.reset = scsi_generic_reset, |
Gerd Hoffmann | d52affa | 2009-08-31 14:24:04 +0200 | [diff] [blame] | 481 | .init = scsi_generic_initfn, |
| 482 | .destroy = scsi_destroy, |
Hannes Reinecke | 5c6c0e5 | 2011-04-18 12:35:39 +0200 | [diff] [blame] | 483 | .alloc_req = scsi_new_request, |
Gerd Hoffmann | d52affa | 2009-08-31 14:24:04 +0200 | [diff] [blame] | 484 | .qdev.props = (Property[]) { |
Christoph Hellwig | 428c149 | 2010-02-10 23:37:09 +0100 | [diff] [blame] | 485 | DEFINE_BLOCK_PROPERTIES(SCSIGenericState, qdev.conf), |
Gerd Hoffmann | d52affa | 2009-08-31 14:24:04 +0200 | [diff] [blame] | 486 | DEFINE_PROP_END_OF_LIST(), |
| 487 | }, |
| 488 | }; |
| 489 | |
| 490 | static void scsi_generic_register_devices(void) |
| 491 | { |
| 492 | scsi_qdev_register(&scsi_generic_info); |
| 493 | } |
| 494 | device_init(scsi_generic_register_devices) |
| 495 | |
ths | 2cc977e | 2007-12-24 16:11:51 +0000 | [diff] [blame] | 496 | #endif /* __linux__ */ |