root / hw / scsi-generic.c @ 0d65e1f8
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/*
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* Generic SCSI Device support
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*
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* Copyright (c) 2007 Bull S.A.S.
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* Based on code by Paul Brook
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* Based on code by Fabrice Bellard
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*
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* Written by Laurent Vivier <Laurent.Vivier@bull.net>
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*
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* This code is licenced under the LGPL.
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*
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*/
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#include "qemu-common.h" |
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#include "block.h" |
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#include "scsi.h" |
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|
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#ifdef __linux__
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|
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//#define DEBUG_SCSI
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|
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#ifdef DEBUG_SCSI
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#define DPRINTF(fmt, ...) \
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do { printf("scsi-generic: " fmt , ## __VA_ARGS__); } while (0) |
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#else
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#define DPRINTF(fmt, ...) do {} while(0) |
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#endif
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|
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#define BADF(fmt, ...) \
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do { fprintf(stderr, "scsi-generic: " fmt , ## __VA_ARGS__); } while (0) |
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|
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#include <stdio.h> |
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#include <sys/types.h> |
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#include <sys/stat.h> |
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#include <unistd.h> |
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#include <scsi/sg.h> |
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#include "scsi-defs.h" |
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|
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#define SCSI_SENSE_BUF_SIZE 96 |
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|
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#define SG_ERR_DRIVER_TIMEOUT 0x06 |
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#define SG_ERR_DRIVER_SENSE 0x08 |
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|
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#ifndef MAX_UINT
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#define MAX_UINT ((unsigned int)-1) |
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#endif
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typedef struct SCSIGenericState SCSIGenericState; |
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typedef struct SCSIGenericReq { |
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SCSIRequest req; |
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uint8_t *buf; |
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int buflen;
|
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int len;
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sg_io_hdr_t io_header; |
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} SCSIGenericReq; |
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|
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struct SCSIGenericState
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{
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SCSIDevice qdev; |
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DriveInfo *dinfo; |
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int type;
|
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int lun;
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int driver_status;
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uint8_t sensebuf[SCSI_SENSE_BUF_SIZE]; |
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uint8_t senselen; |
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}; |
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|
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static SCSIGenericReq *scsi_new_request(SCSIDevice *d, uint32_t tag, uint32_t lun)
|
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{
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SCSIRequest *req; |
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req = scsi_req_alloc(sizeof(SCSIGenericReq), d, tag, lun);
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return DO_UPCAST(SCSIGenericReq, req, req);
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} |
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|
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static void scsi_remove_request(SCSIGenericReq *r) |
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{
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qemu_free(r->buf); |
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scsi_req_free(&r->req); |
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} |
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|
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static SCSIGenericReq *scsi_find_request(SCSIGenericState *s, uint32_t tag)
|
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{
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return DO_UPCAST(SCSIGenericReq, req, scsi_req_find(&s->qdev, tag));
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} |
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|
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/* Helper function for command completion. */
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static void scsi_command_complete(void *opaque, int ret) |
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{
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SCSIGenericReq *r = (SCSIGenericReq *)opaque; |
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SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev, r->req.dev); |
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uint32_t tag; |
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int status;
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s->driver_status = r->io_header.driver_status; |
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if (s->driver_status & SG_ERR_DRIVER_SENSE)
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s->senselen = r->io_header.sb_len_wr; |
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if (ret != 0) |
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status = BUSY << 1;
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else {
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if (s->driver_status & SG_ERR_DRIVER_TIMEOUT) {
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status = BUSY << 1;
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BADF("Driver Timeout\n");
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} else if (r->io_header.status) |
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status = r->io_header.status; |
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else if (s->driver_status & SG_ERR_DRIVER_SENSE) |
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status = CHECK_CONDITION << 1;
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else
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status = GOOD << 1;
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} |
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DPRINTF("Command complete 0x%p tag=0x%x status=%d\n",
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r, r->req.tag, status); |
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tag = r->req.tag; |
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r->req.bus->complete(r->req.bus, SCSI_REASON_DONE, tag, status); |
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scsi_remove_request(r); |
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} |
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|
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/* Cancel a pending data transfer. */
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static void scsi_cancel_io(SCSIDevice *d, uint32_t tag) |
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{
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DPRINTF("scsi_cancel_io 0x%x\n", tag);
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SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev, d); |
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SCSIGenericReq *r; |
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DPRINTF("Cancel tag=0x%x\n", tag);
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r = scsi_find_request(s, tag); |
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if (r) {
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if (r->req.aiocb)
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bdrv_aio_cancel(r->req.aiocb); |
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r->req.aiocb = NULL;
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scsi_remove_request(r); |
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} |
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} |
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static int execute_command(BlockDriverState *bdrv, |
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SCSIGenericReq *r, int direction,
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BlockDriverCompletionFunc *complete) |
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{
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SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev, r->req.dev); |
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r->io_header.interface_id = 'S';
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r->io_header.dxfer_direction = direction; |
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r->io_header.dxferp = r->buf; |
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r->io_header.dxfer_len = r->buflen; |
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r->io_header.cmdp = r->req.cmd.buf; |
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r->io_header.cmd_len = r->req.cmd.len; |
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r->io_header.mx_sb_len = sizeof(s->sensebuf);
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r->io_header.sbp = s->sensebuf; |
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r->io_header.timeout = MAX_UINT; |
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r->io_header.usr_ptr = r; |
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r->io_header.flags |= SG_FLAG_DIRECT_IO; |
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r->req.aiocb = bdrv_aio_ioctl(bdrv, SG_IO, &r->io_header, complete, r); |
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if (r->req.aiocb == NULL) { |
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BADF("execute_command: read failed !\n");
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return -1; |
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} |
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return 0; |
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} |
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|
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static void scsi_read_complete(void * opaque, int ret) |
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{
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SCSIGenericReq *r = (SCSIGenericReq *)opaque; |
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int len;
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if (ret) {
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DPRINTF("IO error\n");
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scsi_command_complete(r, ret); |
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return;
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} |
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len = r->io_header.dxfer_len - r->io_header.resid; |
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DPRINTF("Data ready tag=0x%x len=%d\n", r->req.tag, len);
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r->len = -1;
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r->req.bus->complete(r->req.bus, SCSI_REASON_DATA, r->req.tag, len); |
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if (len == 0) |
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scsi_command_complete(r, 0);
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} |
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|
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/* Read more data from scsi device into buffer. */
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static void scsi_read_data(SCSIDevice *d, uint32_t tag) |
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{
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SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev, d); |
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SCSIGenericReq *r; |
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int ret;
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DPRINTF("scsi_read_data 0x%x\n", tag);
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r = scsi_find_request(s, tag); |
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if (!r) {
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BADF("Bad read tag 0x%x\n", tag);
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/* ??? This is the wrong error. */
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scsi_command_complete(r, -EINVAL); |
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return;
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} |
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if (r->len == -1) { |
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scsi_command_complete(r, 0);
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return;
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} |
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if (r->req.cmd.buf[0] == REQUEST_SENSE && s->driver_status & SG_ERR_DRIVER_SENSE) |
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{
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s->senselen = MIN(r->len, s->senselen); |
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memcpy(r->buf, s->sensebuf, s->senselen); |
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r->io_header.driver_status = 0;
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r->io_header.status = 0;
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r->io_header.dxfer_len = s->senselen; |
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r->len = -1;
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DPRINTF("Data ready tag=0x%x len=%d\n", r->req.tag, s->senselen);
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DPRINTF("Sense: %d %d %d %d %d %d %d %d\n",
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r->buf[0], r->buf[1], r->buf[2], r->buf[3], |
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r->buf[4], r->buf[5], r->buf[6], r->buf[7]); |
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r->req.bus->complete(r->req.bus, SCSI_REASON_DATA, r->req.tag, s->senselen); |
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return;
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} |
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ret = execute_command(s->dinfo->bdrv, r, SG_DXFER_FROM_DEV, scsi_read_complete); |
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if (ret == -1) { |
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scsi_command_complete(r, -EINVAL); |
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return;
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} |
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} |
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|
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static void scsi_write_complete(void * opaque, int ret) |
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{
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SCSIGenericReq *r = (SCSIGenericReq *)opaque; |
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SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev, r->req.dev); |
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|
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DPRINTF("scsi_write_complete() ret = %d\n", ret);
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if (ret) {
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DPRINTF("IO error\n");
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scsi_command_complete(r, ret); |
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return;
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} |
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|
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if (r->req.cmd.buf[0] == MODE_SELECT && r->req.cmd.buf[4] == 12 && |
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s->type == TYPE_TAPE) {
|
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s->qdev.blocksize = (r->buf[9] << 16) | (r->buf[10] << 8) | r->buf[11]; |
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DPRINTF("block size %d\n", s->blocksize);
|
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} |
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scsi_command_complete(r, ret); |
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} |
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/* Write data to a scsi device. Returns nonzero on failure.
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The transfer may complete asynchronously. */
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static int scsi_write_data(SCSIDevice *d, uint32_t tag) |
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{
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SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev, d); |
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SCSIGenericReq *r; |
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int ret;
|
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DPRINTF("scsi_write_data 0x%x\n", tag);
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r = scsi_find_request(s, tag); |
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if (!r) {
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BADF("Bad write tag 0x%x\n", tag);
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/* ??? This is the wrong error. */
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scsi_command_complete(r, -EINVAL); |
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return 0; |
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} |
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|
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if (r->len == 0) { |
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r->len = r->buflen; |
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r->req.bus->complete(r->req.bus, SCSI_REASON_DATA, r->req.tag, r->len); |
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return 0; |
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} |
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|
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ret = execute_command(s->dinfo->bdrv, r, SG_DXFER_TO_DEV, scsi_write_complete); |
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if (ret == -1) { |
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scsi_command_complete(r, -EINVAL); |
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return 1; |
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} |
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|
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return 0; |
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} |
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|
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/* Return a pointer to the data buffer. */
|
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static uint8_t *scsi_get_buf(SCSIDevice *d, uint32_t tag)
|
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{
|
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SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev, d); |
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SCSIGenericReq *r; |
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r = scsi_find_request(s, tag); |
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if (!r) {
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BADF("Bad buffer tag 0x%x\n", tag);
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return NULL; |
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} |
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return r->buf;
|
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} |
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|
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static int scsi_length(uint8_t *cmd, int blocksize, int *cmdlen, uint32_t *len) |
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{
|
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switch (cmd[0] >> 5) { |
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case 0: |
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*len = cmd[4];
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*cmdlen = 6;
|
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/* length 0 means 256 blocks */
|
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if (*len == 0) |
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*len = 256;
|
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break;
|
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case 1: |
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case 2: |
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*len = cmd[8] | (cmd[7] << 8); |
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*cmdlen = 10;
|
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break;
|
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case 4: |
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*len = cmd[13] | (cmd[12] << 8) | (cmd[11] << 16) | (cmd[10] << 24); |
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*cmdlen = 16;
|
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break;
|
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case 5: |
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*len = cmd[9] | (cmd[8] << 8) | (cmd[7] << 16) | (cmd[6] << 24); |
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*cmdlen = 12;
|
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break;
|
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default:
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return -1; |
| 317 |
} |
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|
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switch(cmd[0]) { |
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case TEST_UNIT_READY:
|
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case REZERO_UNIT:
|
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case START_STOP:
|
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case SEEK_6:
|
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case WRITE_FILEMARKS:
|
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case SPACE:
|
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case ERASE:
|
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case ALLOW_MEDIUM_REMOVAL:
|
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case VERIFY:
|
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case SEEK_10:
|
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case SYNCHRONIZE_CACHE:
|
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case LOCK_UNLOCK_CACHE:
|
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case LOAD_UNLOAD:
|
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case SET_CD_SPEED:
|
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case SET_LIMITS:
|
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case WRITE_LONG:
|
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case MOVE_MEDIUM:
|
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case UPDATE_BLOCK:
|
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*len = 0;
|
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break;
|
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case MODE_SENSE:
|
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break;
|
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case WRITE_SAME:
|
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*len = 1;
|
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break;
|
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case READ_CAPACITY:
|
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*len = 8;
|
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break;
|
| 348 |
case READ_BLOCK_LIMITS:
|
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*len = 6;
|
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break;
|
| 351 |
case READ_POSITION:
|
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*len = 20;
|
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break;
|
| 354 |
case SEND_VOLUME_TAG:
|
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*len *= 40;
|
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break;
|
| 357 |
case MEDIUM_SCAN:
|
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*len *= 8;
|
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break;
|
| 360 |
case WRITE_10:
|
| 361 |
cmd[1] &= ~0x08; /* disable FUA */ |
| 362 |
case WRITE_VERIFY:
|
| 363 |
case WRITE_6:
|
| 364 |
case WRITE_12:
|
| 365 |
case WRITE_VERIFY_12:
|
| 366 |
*len *= blocksize; |
| 367 |
break;
|
| 368 |
case READ_10:
|
| 369 |
cmd[1] &= ~0x08; /* disable FUA */ |
| 370 |
case READ_6:
|
| 371 |
case READ_REVERSE:
|
| 372 |
case RECOVER_BUFFERED_DATA:
|
| 373 |
case READ_12:
|
| 374 |
*len *= blocksize; |
| 375 |
break;
|
| 376 |
case INQUIRY:
|
| 377 |
*len = cmd[4] | (cmd[3] << 8); |
| 378 |
break;
|
| 379 |
} |
| 380 |
return 0; |
| 381 |
} |
| 382 |
|
| 383 |
static int scsi_stream_length(uint8_t *cmd, int blocksize, int *cmdlen, uint32_t *len) |
| 384 |
{
|
| 385 |
switch(cmd[0]) { |
| 386 |
/* stream commands */
|
| 387 |
case READ_6:
|
| 388 |
case READ_REVERSE:
|
| 389 |
case RECOVER_BUFFERED_DATA:
|
| 390 |
case WRITE_6:
|
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*cmdlen = 6;
|
| 392 |
*len = cmd[4] | (cmd[3] << 8) | (cmd[2] << 16); |
| 393 |
if (cmd[1] & 0x01) /* fixed */ |
| 394 |
*len *= blocksize; |
| 395 |
break;
|
| 396 |
case REWIND:
|
| 397 |
case START_STOP:
|
| 398 |
*cmdlen = 6;
|
| 399 |
*len = 0;
|
| 400 |
cmd[1] = 0x01; /* force IMMED, otherwise qemu waits end of command */ |
| 401 |
break;
|
| 402 |
/* generic commands */
|
| 403 |
default:
|
| 404 |
return scsi_length(cmd, blocksize, cmdlen, len);
|
| 405 |
} |
| 406 |
return 0; |
| 407 |
} |
| 408 |
|
| 409 |
static int is_write(int command) |
| 410 |
{
|
| 411 |
switch (command) {
|
| 412 |
case COPY:
|
| 413 |
case COPY_VERIFY:
|
| 414 |
case COMPARE:
|
| 415 |
case CHANGE_DEFINITION:
|
| 416 |
case LOG_SELECT:
|
| 417 |
case MODE_SELECT:
|
| 418 |
case MODE_SELECT_10:
|
| 419 |
case SEND_DIAGNOSTIC:
|
| 420 |
case WRITE_BUFFER:
|
| 421 |
case FORMAT_UNIT:
|
| 422 |
case REASSIGN_BLOCKS:
|
| 423 |
case RESERVE:
|
| 424 |
case SEARCH_EQUAL:
|
| 425 |
case SEARCH_HIGH:
|
| 426 |
case SEARCH_LOW:
|
| 427 |
case WRITE_6:
|
| 428 |
case WRITE_10:
|
| 429 |
case WRITE_VERIFY:
|
| 430 |
case UPDATE_BLOCK:
|
| 431 |
case WRITE_LONG:
|
| 432 |
case WRITE_SAME:
|
| 433 |
case SEARCH_HIGH_12:
|
| 434 |
case SEARCH_EQUAL_12:
|
| 435 |
case SEARCH_LOW_12:
|
| 436 |
case WRITE_12:
|
| 437 |
case WRITE_VERIFY_12:
|
| 438 |
case SET_WINDOW:
|
| 439 |
case MEDIUM_SCAN:
|
| 440 |
case SEND_VOLUME_TAG:
|
| 441 |
case WRITE_LONG_2:
|
| 442 |
return 1; |
| 443 |
} |
| 444 |
return 0; |
| 445 |
} |
| 446 |
|
| 447 |
/* Execute a scsi command. Returns the length of the data expected by the
|
| 448 |
command. This will be Positive for data transfers from the device
|
| 449 |
(eg. disk reads), negative for transfers to the device (eg. disk writes),
|
| 450 |
and zero if the command does not transfer any data. */
|
| 451 |
|
| 452 |
static int32_t scsi_send_command(SCSIDevice *d, uint32_t tag,
|
| 453 |
uint8_t *cmd, int lun)
|
| 454 |
{
|
| 455 |
SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev, d); |
| 456 |
uint32_t len=0;
|
| 457 |
int cmdlen=0; |
| 458 |
SCSIGenericReq *r; |
| 459 |
SCSIBus *bus; |
| 460 |
int ret;
|
| 461 |
|
| 462 |
if (s->type == TYPE_TAPE) {
|
| 463 |
if (scsi_stream_length(cmd, s->qdev.blocksize, &cmdlen, &len) == -1) { |
| 464 |
BADF("Unsupported command length, command %x\n", cmd[0]); |
| 465 |
return 0; |
| 466 |
} |
| 467 |
} else {
|
| 468 |
if (scsi_length(cmd, s->qdev.blocksize, &cmdlen, &len) == -1) { |
| 469 |
BADF("Unsupported command length, command %x\n", cmd[0]); |
| 470 |
return 0; |
| 471 |
} |
| 472 |
} |
| 473 |
|
| 474 |
DPRINTF("Command: lun=%d tag=0x%x data=0x%02x len %d\n", lun, tag,
|
| 475 |
cmd[0], len);
|
| 476 |
|
| 477 |
if (cmd[0] != REQUEST_SENSE && |
| 478 |
(lun != s->lun || (cmd[1] >> 5) != s->lun)) { |
| 479 |
DPRINTF("Unimplemented LUN %d\n", lun ? lun : cmd[1] >> 5); |
| 480 |
|
| 481 |
s->sensebuf[0] = 0x70; |
| 482 |
s->sensebuf[1] = 0x00; |
| 483 |
s->sensebuf[2] = ILLEGAL_REQUEST;
|
| 484 |
s->sensebuf[3] = 0x00; |
| 485 |
s->sensebuf[4] = 0x00; |
| 486 |
s->sensebuf[5] = 0x00; |
| 487 |
s->sensebuf[6] = 0x00; |
| 488 |
s->senselen = 7;
|
| 489 |
s->driver_status = SG_ERR_DRIVER_SENSE; |
| 490 |
bus = scsi_bus_from_device(d); |
| 491 |
bus->complete(bus, SCSI_REASON_DONE, tag, CHECK_CONDITION << 1);
|
| 492 |
return 0; |
| 493 |
} |
| 494 |
|
| 495 |
r = scsi_find_request(s, tag); |
| 496 |
if (r) {
|
| 497 |
BADF("Tag 0x%x already in use %p\n", tag, r);
|
| 498 |
scsi_cancel_io(d, tag); |
| 499 |
} |
| 500 |
r = scsi_new_request(d, tag, lun); |
| 501 |
|
| 502 |
memcpy(r->req.cmd.buf, cmd, cmdlen); |
| 503 |
r->req.cmd.len = cmdlen; |
| 504 |
|
| 505 |
if (len == 0) { |
| 506 |
if (r->buf != NULL) |
| 507 |
qemu_free(r->buf); |
| 508 |
r->buflen = 0;
|
| 509 |
r->buf = NULL;
|
| 510 |
ret = execute_command(s->dinfo->bdrv, r, SG_DXFER_NONE, scsi_command_complete); |
| 511 |
if (ret == -1) { |
| 512 |
scsi_command_complete(r, -EINVAL); |
| 513 |
return 0; |
| 514 |
} |
| 515 |
return 0; |
| 516 |
} |
| 517 |
|
| 518 |
if (r->buflen != len) {
|
| 519 |
if (r->buf != NULL) |
| 520 |
qemu_free(r->buf); |
| 521 |
r->buf = qemu_malloc(len); |
| 522 |
r->buflen = len; |
| 523 |
} |
| 524 |
|
| 525 |
memset(r->buf, 0, r->buflen);
|
| 526 |
r->len = len; |
| 527 |
if (is_write(cmd[0])) { |
| 528 |
r->len = 0;
|
| 529 |
return -len;
|
| 530 |
} |
| 531 |
|
| 532 |
return len;
|
| 533 |
} |
| 534 |
|
| 535 |
static int get_blocksize(BlockDriverState *bdrv) |
| 536 |
{
|
| 537 |
uint8_t cmd[10];
|
| 538 |
uint8_t buf[8];
|
| 539 |
uint8_t sensebuf[8];
|
| 540 |
sg_io_hdr_t io_header; |
| 541 |
int ret;
|
| 542 |
|
| 543 |
memset(cmd, 0, sizeof(cmd)); |
| 544 |
memset(buf, 0, sizeof(buf)); |
| 545 |
cmd[0] = READ_CAPACITY;
|
| 546 |
|
| 547 |
memset(&io_header, 0, sizeof(io_header)); |
| 548 |
io_header.interface_id = 'S';
|
| 549 |
io_header.dxfer_direction = SG_DXFER_FROM_DEV; |
| 550 |
io_header.dxfer_len = sizeof(buf);
|
| 551 |
io_header.dxferp = buf; |
| 552 |
io_header.cmdp = cmd; |
| 553 |
io_header.cmd_len = sizeof(cmd);
|
| 554 |
io_header.mx_sb_len = sizeof(sensebuf);
|
| 555 |
io_header.sbp = sensebuf; |
| 556 |
io_header.timeout = 6000; /* XXX */ |
| 557 |
|
| 558 |
ret = bdrv_ioctl(bdrv, SG_IO, &io_header); |
| 559 |
if (ret < 0) |
| 560 |
return -1; |
| 561 |
|
| 562 |
return (buf[4] << 24) | (buf[5] << 16) | (buf[6] << 8) | buf[7]; |
| 563 |
} |
| 564 |
|
| 565 |
static int get_stream_blocksize(BlockDriverState *bdrv) |
| 566 |
{
|
| 567 |
uint8_t cmd[6];
|
| 568 |
uint8_t buf[12];
|
| 569 |
uint8_t sensebuf[8];
|
| 570 |
sg_io_hdr_t io_header; |
| 571 |
int ret;
|
| 572 |
|
| 573 |
memset(cmd, 0, sizeof(cmd)); |
| 574 |
memset(buf, 0, sizeof(buf)); |
| 575 |
cmd[0] = MODE_SENSE;
|
| 576 |
cmd[4] = sizeof(buf); |
| 577 |
|
| 578 |
memset(&io_header, 0, sizeof(io_header)); |
| 579 |
io_header.interface_id = 'S';
|
| 580 |
io_header.dxfer_direction = SG_DXFER_FROM_DEV; |
| 581 |
io_header.dxfer_len = sizeof(buf);
|
| 582 |
io_header.dxferp = buf; |
| 583 |
io_header.cmdp = cmd; |
| 584 |
io_header.cmd_len = sizeof(cmd);
|
| 585 |
io_header.mx_sb_len = sizeof(sensebuf);
|
| 586 |
io_header.sbp = sensebuf; |
| 587 |
io_header.timeout = 6000; /* XXX */ |
| 588 |
|
| 589 |
ret = bdrv_ioctl(bdrv, SG_IO, &io_header); |
| 590 |
if (ret < 0) |
| 591 |
return -1; |
| 592 |
|
| 593 |
return (buf[9] << 16) | (buf[10] << 8) | buf[11]; |
| 594 |
} |
| 595 |
|
| 596 |
static void scsi_destroy(SCSIDevice *d) |
| 597 |
{
|
| 598 |
SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev, d); |
| 599 |
SCSIGenericReq *r; |
| 600 |
|
| 601 |
while (!QTAILQ_EMPTY(&s->qdev.requests)) {
|
| 602 |
r = DO_UPCAST(SCSIGenericReq, req, QTAILQ_FIRST(&s->qdev.requests)); |
| 603 |
scsi_remove_request(r); |
| 604 |
} |
| 605 |
drive_uninit(s->dinfo); |
| 606 |
} |
| 607 |
|
| 608 |
static int scsi_generic_initfn(SCSIDevice *dev) |
| 609 |
{
|
| 610 |
SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev, dev); |
| 611 |
int sg_version;
|
| 612 |
struct sg_scsi_id scsiid;
|
| 613 |
|
| 614 |
if (!s->dinfo || !s->dinfo->bdrv) {
|
| 615 |
qemu_error("scsi-generic: drive property not set\n");
|
| 616 |
return -1; |
| 617 |
} |
| 618 |
|
| 619 |
/* check we are really using a /dev/sg* file */
|
| 620 |
if (!bdrv_is_sg(s->dinfo->bdrv)) {
|
| 621 |
qemu_error("scsi-generic: not /dev/sg*\n");
|
| 622 |
return -1; |
| 623 |
} |
| 624 |
|
| 625 |
/* check we are using a driver managing SG_IO (version 3 and after */
|
| 626 |
if (bdrv_ioctl(s->dinfo->bdrv, SG_GET_VERSION_NUM, &sg_version) < 0 || |
| 627 |
sg_version < 30000) {
|
| 628 |
qemu_error("scsi-generic: scsi generic interface too old\n");
|
| 629 |
return -1; |
| 630 |
} |
| 631 |
|
| 632 |
/* get LUN of the /dev/sg? */
|
| 633 |
if (bdrv_ioctl(s->dinfo->bdrv, SG_GET_SCSI_ID, &scsiid)) {
|
| 634 |
qemu_error("scsi-generic: SG_GET_SCSI_ID ioctl failed\n");
|
| 635 |
return -1; |
| 636 |
} |
| 637 |
|
| 638 |
/* define device state */
|
| 639 |
s->lun = scsiid.lun; |
| 640 |
DPRINTF("LUN %d\n", s->lun);
|
| 641 |
s->type = scsiid.scsi_type; |
| 642 |
DPRINTF("device type %d\n", s->type);
|
| 643 |
if (s->type == TYPE_TAPE) {
|
| 644 |
s->qdev.blocksize = get_stream_blocksize(s->dinfo->bdrv); |
| 645 |
if (s->qdev.blocksize == -1) |
| 646 |
s->qdev.blocksize = 0;
|
| 647 |
} else {
|
| 648 |
s->qdev.blocksize = get_blocksize(s->dinfo->bdrv); |
| 649 |
/* removable media returns 0 if not present */
|
| 650 |
if (s->qdev.blocksize <= 0) { |
| 651 |
if (s->type == TYPE_ROM || s->type == TYPE_WORM)
|
| 652 |
s->qdev.blocksize = 2048;
|
| 653 |
else
|
| 654 |
s->qdev.blocksize = 512;
|
| 655 |
} |
| 656 |
} |
| 657 |
DPRINTF("block size %d\n", s->qdev.blocksize);
|
| 658 |
s->driver_status = 0;
|
| 659 |
memset(s->sensebuf, 0, sizeof(s->sensebuf)); |
| 660 |
return 0; |
| 661 |
} |
| 662 |
|
| 663 |
static SCSIDeviceInfo scsi_generic_info = {
|
| 664 |
.qdev.name = "scsi-generic",
|
| 665 |
.qdev.desc = "pass through generic scsi device (/dev/sg*)",
|
| 666 |
.qdev.size = sizeof(SCSIGenericState),
|
| 667 |
.init = scsi_generic_initfn, |
| 668 |
.destroy = scsi_destroy, |
| 669 |
.send_command = scsi_send_command, |
| 670 |
.read_data = scsi_read_data, |
| 671 |
.write_data = scsi_write_data, |
| 672 |
.cancel_io = scsi_cancel_io, |
| 673 |
.get_buf = scsi_get_buf, |
| 674 |
.qdev.props = (Property[]) {
|
| 675 |
DEFINE_PROP_DRIVE("drive", SCSIGenericState, dinfo),
|
| 676 |
DEFINE_PROP_END_OF_LIST(), |
| 677 |
}, |
| 678 |
}; |
| 679 |
|
| 680 |
static void scsi_generic_register_devices(void) |
| 681 |
{
|
| 682 |
scsi_qdev_register(&scsi_generic_info); |
| 683 |
} |
| 684 |
device_init(scsi_generic_register_devices) |
| 685 |
|
| 686 |
#endif /* __linux__ */ |