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-rw-r--r--hw/scsi-generic.c516
1 files changed, 0 insertions, 516 deletions
diff --git a/hw/scsi-generic.c b/hw/scsi-generic.c
deleted file mode 100644
index 4d04caccce..0000000000
--- a/hw/scsi-generic.c
+++ /dev/null
@@ -1,516 +0,0 @@
-/*
- * Generic SCSI Device support
- *
- * Copyright (c) 2007 Bull S.A.S.
- * Based on code by Paul Brook
- * Based on code by Fabrice Bellard
- *
- * Written by Laurent Vivier <Laurent.Vivier@bull.net>
- *
- * This code is licensed under the LGPL.
- *
- */
-
-#include "qemu-common.h"
-#include "qemu/error-report.h"
-#include "hw/scsi.h"
-#include "sysemu/blockdev.h"
-
-#ifdef __linux__
-
-//#define DEBUG_SCSI
-
-#ifdef DEBUG_SCSI
-#define DPRINTF(fmt, ...) \
-do { printf("scsi-generic: " fmt , ## __VA_ARGS__); } while (0)
-#else
-#define DPRINTF(fmt, ...) do {} while(0)
-#endif
-
-#define BADF(fmt, ...) \
-do { fprintf(stderr, "scsi-generic: " fmt , ## __VA_ARGS__); } while (0)
-
-#include <stdio.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <unistd.h>
-#include <scsi/sg.h>
-#include "hw/scsi-defs.h"
-
-#define SCSI_SENSE_BUF_SIZE 96
-
-#define SG_ERR_DRIVER_TIMEOUT 0x06
-#define SG_ERR_DRIVER_SENSE 0x08
-
-#define SG_ERR_DID_OK 0x00
-#define SG_ERR_DID_NO_CONNECT 0x01
-#define SG_ERR_DID_BUS_BUSY 0x02
-#define SG_ERR_DID_TIME_OUT 0x03
-
-#ifndef MAX_UINT
-#define MAX_UINT ((unsigned int)-1)
-#endif
-
-typedef struct SCSIGenericReq {
- SCSIRequest req;
- uint8_t *buf;
- int buflen;
- int len;
- sg_io_hdr_t io_header;
-} SCSIGenericReq;
-
-static void scsi_generic_save_request(QEMUFile *f, SCSIRequest *req)
-{
- SCSIGenericReq *r = DO_UPCAST(SCSIGenericReq, req, req);
-
- qemu_put_sbe32s(f, &r->buflen);
- if (r->buflen && r->req.cmd.mode == SCSI_XFER_TO_DEV) {
- assert(!r->req.sg);
- qemu_put_buffer(f, r->buf, r->req.cmd.xfer);
- }
-}
-
-static void scsi_generic_load_request(QEMUFile *f, SCSIRequest *req)
-{
- SCSIGenericReq *r = DO_UPCAST(SCSIGenericReq, req, req);
-
- qemu_get_sbe32s(f, &r->buflen);
- if (r->buflen && r->req.cmd.mode == SCSI_XFER_TO_DEV) {
- assert(!r->req.sg);
- qemu_get_buffer(f, r->buf, r->req.cmd.xfer);
- }
-}
-
-static void scsi_free_request(SCSIRequest *req)
-{
- SCSIGenericReq *r = DO_UPCAST(SCSIGenericReq, req, req);
-
- g_free(r->buf);
-}
-
-/* Helper function for command completion. */
-static void scsi_command_complete(void *opaque, int ret)
-{
- int status;
- SCSIGenericReq *r = (SCSIGenericReq *)opaque;
-
- r->req.aiocb = NULL;
- if (r->io_header.driver_status & SG_ERR_DRIVER_SENSE) {
- r->req.sense_len = r->io_header.sb_len_wr;
- }
-
- if (ret != 0) {
- switch (ret) {
- case -EDOM:
- status = TASK_SET_FULL;
- break;
- case -ENOMEM:
- status = CHECK_CONDITION;
- scsi_req_build_sense(&r->req, SENSE_CODE(TARGET_FAILURE));
- break;
- default:
- status = CHECK_CONDITION;
- scsi_req_build_sense(&r->req, SENSE_CODE(IO_ERROR));
- break;
- }
- } else {
- if (r->io_header.host_status == SG_ERR_DID_NO_CONNECT ||
- r->io_header.host_status == SG_ERR_DID_BUS_BUSY ||
- r->io_header.host_status == SG_ERR_DID_TIME_OUT ||
- (r->io_header.driver_status & SG_ERR_DRIVER_TIMEOUT)) {
- status = BUSY;
- BADF("Driver Timeout\n");
- } else if (r->io_header.host_status) {
- status = CHECK_CONDITION;
- scsi_req_build_sense(&r->req, SENSE_CODE(I_T_NEXUS_LOSS));
- } else if (r->io_header.status) {
- status = r->io_header.status;
- } else if (r->io_header.driver_status & SG_ERR_DRIVER_SENSE) {
- status = CHECK_CONDITION;
- } else {
- status = GOOD;
- }
- }
- DPRINTF("Command complete 0x%p tag=0x%x status=%d\n",
- r, r->req.tag, status);
-
- scsi_req_complete(&r->req, status);
- if (!r->req.io_canceled) {
- scsi_req_unref(&r->req);
- }
-}
-
-/* Cancel a pending data transfer. */
-static void scsi_cancel_io(SCSIRequest *req)
-{
- SCSIGenericReq *r = DO_UPCAST(SCSIGenericReq, req, req);
-
- DPRINTF("Cancel tag=0x%x\n", req->tag);
- if (r->req.aiocb) {
- bdrv_aio_cancel(r->req.aiocb);
-
- /* This reference was left in by scsi_*_data. We take ownership of
- * it independent of whether bdrv_aio_cancel completes the request
- * or not. */
- scsi_req_unref(&r->req);
- }
- r->req.aiocb = NULL;
-}
-
-static int execute_command(BlockDriverState *bdrv,
- SCSIGenericReq *r, int direction,
- BlockDriverCompletionFunc *complete)
-{
- r->io_header.interface_id = 'S';
- r->io_header.dxfer_direction = direction;
- r->io_header.dxferp = r->buf;
- r->io_header.dxfer_len = r->buflen;
- r->io_header.cmdp = r->req.cmd.buf;
- r->io_header.cmd_len = r->req.cmd.len;
- r->io_header.mx_sb_len = sizeof(r->req.sense);
- r->io_header.sbp = r->req.sense;
- r->io_header.timeout = MAX_UINT;
- r->io_header.usr_ptr = r;
- r->io_header.flags |= SG_FLAG_DIRECT_IO;
-
- r->req.aiocb = bdrv_aio_ioctl(bdrv, SG_IO, &r->io_header, complete, r);
-
- return 0;
-}
-
-static void scsi_read_complete(void * opaque, int ret)
-{
- SCSIGenericReq *r = (SCSIGenericReq *)opaque;
- SCSIDevice *s = r->req.dev;
- int len;
-
- r->req.aiocb = NULL;
- if (ret) {
- DPRINTF("IO error ret %d\n", ret);
- scsi_command_complete(r, ret);
- return;
- }
- len = r->io_header.dxfer_len - r->io_header.resid;
- DPRINTF("Data ready tag=0x%x len=%d\n", r->req.tag, len);
-
- r->len = -1;
- if (len == 0) {
- scsi_command_complete(r, 0);
- } else {
- /* Snoop READ CAPACITY output to set the blocksize. */
- if (r->req.cmd.buf[0] == READ_CAPACITY_10) {
- s->blocksize = ldl_be_p(&r->buf[4]);
- s->max_lba = ldl_be_p(&r->buf[0]);
- } else if (r->req.cmd.buf[0] == SERVICE_ACTION_IN_16 &&
- (r->req.cmd.buf[1] & 31) == SAI_READ_CAPACITY_16) {
- s->blocksize = ldl_be_p(&r->buf[8]);
- s->max_lba = ldq_be_p(&r->buf[0]);
- }
- bdrv_set_buffer_alignment(s->conf.bs, s->blocksize);
-
- scsi_req_data(&r->req, len);
- if (!r->req.io_canceled) {
- scsi_req_unref(&r->req);
- }
- }
-}
-
-/* Read more data from scsi device into buffer. */
-static void scsi_read_data(SCSIRequest *req)
-{
- SCSIGenericReq *r = DO_UPCAST(SCSIGenericReq, req, req);
- SCSIDevice *s = r->req.dev;
- int ret;
-
- DPRINTF("scsi_read_data 0x%x\n", req->tag);
-
- /* The request is used as the AIO opaque value, so add a ref. */
- scsi_req_ref(&r->req);
- if (r->len == -1) {
- scsi_command_complete(r, 0);
- return;
- }
-
- ret = execute_command(s->conf.bs, r, SG_DXFER_FROM_DEV, scsi_read_complete);
- if (ret < 0) {
- scsi_command_complete(r, ret);
- }
-}
-
-static void scsi_write_complete(void * opaque, int ret)
-{
- SCSIGenericReq *r = (SCSIGenericReq *)opaque;
- SCSIDevice *s = r->req.dev;
-
- DPRINTF("scsi_write_complete() ret = %d\n", ret);
- r->req.aiocb = NULL;
- if (ret) {
- DPRINTF("IO error\n");
- scsi_command_complete(r, ret);
- return;
- }
-
- if (r->req.cmd.buf[0] == MODE_SELECT && r->req.cmd.buf[4] == 12 &&
- s->type == TYPE_TAPE) {
- s->blocksize = (r->buf[9] << 16) | (r->buf[10] << 8) | r->buf[11];
- DPRINTF("block size %d\n", s->blocksize);
- }
-
- scsi_command_complete(r, ret);
-}
-
-/* Write data to a scsi device. Returns nonzero on failure.
- The transfer may complete asynchronously. */
-static void scsi_write_data(SCSIRequest *req)
-{
- SCSIGenericReq *r = DO_UPCAST(SCSIGenericReq, req, req);
- SCSIDevice *s = r->req.dev;
- int ret;
-
- DPRINTF("scsi_write_data 0x%x\n", req->tag);
- if (r->len == 0) {
- r->len = r->buflen;
- scsi_req_data(&r->req, r->len);
- return;
- }
-
- /* The request is used as the AIO opaque value, so add a ref. */
- scsi_req_ref(&r->req);
- ret = execute_command(s->conf.bs, r, SG_DXFER_TO_DEV, scsi_write_complete);
- if (ret < 0) {
- scsi_command_complete(r, ret);
- }
-}
-
-/* Return a pointer to the data buffer. */
-static uint8_t *scsi_get_buf(SCSIRequest *req)
-{
- SCSIGenericReq *r = DO_UPCAST(SCSIGenericReq, req, req);
-
- return r->buf;
-}
-
-/* Execute a scsi command. Returns the length of the data expected by the
- command. This will be Positive for data transfers from the device
- (eg. disk reads), negative for transfers to the device (eg. disk writes),
- and zero if the command does not transfer any data. */
-
-static int32_t scsi_send_command(SCSIRequest *req, uint8_t *cmd)
-{
- SCSIGenericReq *r = DO_UPCAST(SCSIGenericReq, req, req);
- SCSIDevice *s = r->req.dev;
- int ret;
-
- DPRINTF("Command: lun=%d tag=0x%x len %zd data=0x%02x", lun, tag,
- r->req.cmd.xfer, cmd[0]);
-
-#ifdef DEBUG_SCSI
- {
- int i;
- for (i = 1; i < r->req.cmd.len; i++) {
- printf(" 0x%02x", cmd[i]);
- }
- printf("\n");
- }
-#endif
-
- if (r->req.cmd.xfer == 0) {
- if (r->buf != NULL)
- g_free(r->buf);
- r->buflen = 0;
- r->buf = NULL;
- /* The request is used as the AIO opaque value, so add a ref. */
- scsi_req_ref(&r->req);
- ret = execute_command(s->conf.bs, r, SG_DXFER_NONE, scsi_command_complete);
- if (ret < 0) {
- scsi_command_complete(r, ret);
- return 0;
- }
- return 0;
- }
-
- if (r->buflen != r->req.cmd.xfer) {
- if (r->buf != NULL)
- g_free(r->buf);
- r->buf = g_malloc(r->req.cmd.xfer);
- r->buflen = r->req.cmd.xfer;
- }
-
- memset(r->buf, 0, r->buflen);
- r->len = r->req.cmd.xfer;
- if (r->req.cmd.mode == SCSI_XFER_TO_DEV) {
- r->len = 0;
- return -r->req.cmd.xfer;
- } else {
- return r->req.cmd.xfer;
- }
-}
-
-static int get_stream_blocksize(BlockDriverState *bdrv)
-{
- uint8_t cmd[6];
- uint8_t buf[12];
- uint8_t sensebuf[8];
- sg_io_hdr_t io_header;
- int ret;
-
- memset(cmd, 0, sizeof(cmd));
- memset(buf, 0, sizeof(buf));
- cmd[0] = MODE_SENSE;
- cmd[4] = sizeof(buf);
-
- memset(&io_header, 0, sizeof(io_header));
- io_header.interface_id = 'S';
- io_header.dxfer_direction = SG_DXFER_FROM_DEV;
- io_header.dxfer_len = sizeof(buf);
- io_header.dxferp = buf;
- io_header.cmdp = cmd;
- io_header.cmd_len = sizeof(cmd);
- io_header.mx_sb_len = sizeof(sensebuf);
- io_header.sbp = sensebuf;
- io_header.timeout = 6000; /* XXX */
-
- ret = bdrv_ioctl(bdrv, SG_IO, &io_header);
- if (ret < 0 || io_header.driver_status || io_header.host_status) {
- return -1;
- }
- return (buf[9] << 16) | (buf[10] << 8) | buf[11];
-}
-
-static void scsi_generic_reset(DeviceState *dev)
-{
- SCSIDevice *s = SCSI_DEVICE(dev);
-
- scsi_device_purge_requests(s, SENSE_CODE(RESET));
-}
-
-static void scsi_destroy(SCSIDevice *s)
-{
- scsi_device_purge_requests(s, SENSE_CODE(NO_SENSE));
- blockdev_mark_auto_del(s->conf.bs);
-}
-
-static int scsi_generic_initfn(SCSIDevice *s)
-{
- int sg_version;
- struct sg_scsi_id scsiid;
-
- if (!s->conf.bs) {
- error_report("drive property not set");
- return -1;
- }
-
- if (bdrv_get_on_error(s->conf.bs, 0) != BLOCKDEV_ON_ERROR_ENOSPC) {
- error_report("Device doesn't support drive option werror");
- return -1;
- }
- if (bdrv_get_on_error(s->conf.bs, 1) != BLOCKDEV_ON_ERROR_REPORT) {
- error_report("Device doesn't support drive option rerror");
- return -1;
- }
-
- /* check we are using a driver managing SG_IO (version 3 and after */
- if (bdrv_ioctl(s->conf.bs, SG_GET_VERSION_NUM, &sg_version) < 0) {
- error_report("scsi generic interface not supported");
- return -1;
- }
- if (sg_version < 30000) {
- error_report("scsi generic interface too old");
- return -1;
- }
-
- /* get LUN of the /dev/sg? */
- if (bdrv_ioctl(s->conf.bs, SG_GET_SCSI_ID, &scsiid)) {
- error_report("SG_GET_SCSI_ID ioctl failed");
- return -1;
- }
-
- /* define device state */
- s->type = scsiid.scsi_type;
- DPRINTF("device type %d\n", s->type);
- if (s->type == TYPE_DISK || s->type == TYPE_ROM) {
- add_boot_device_path(s->conf.bootindex, &s->qdev, NULL);
- }
-
- switch (s->type) {
- case TYPE_TAPE:
- s->blocksize = get_stream_blocksize(s->conf.bs);
- if (s->blocksize == -1) {
- s->blocksize = 0;
- }
- break;
-
- /* Make a guess for block devices, we'll fix it when the guest sends.
- * READ CAPACITY. If they don't, they likely would assume these sizes
- * anyway. (TODO: they could also send MODE SENSE).
- */
- case TYPE_ROM:
- case TYPE_WORM:
- s->blocksize = 2048;
- break;
- default:
- s->blocksize = 512;
- break;
- }
-
- DPRINTF("block size %d\n", s->blocksize);
- return 0;
-}
-
-const SCSIReqOps scsi_generic_req_ops = {
- .size = sizeof(SCSIGenericReq),
- .free_req = scsi_free_request,
- .send_command = scsi_send_command,
- .read_data = scsi_read_data,
- .write_data = scsi_write_data,
- .cancel_io = scsi_cancel_io,
- .get_buf = scsi_get_buf,
- .load_request = scsi_generic_load_request,
- .save_request = scsi_generic_save_request,
-};
-
-static SCSIRequest *scsi_new_request(SCSIDevice *d, uint32_t tag, uint32_t lun,
- uint8_t *buf, void *hba_private)
-{
- SCSIRequest *req;
-
- req = scsi_req_alloc(&scsi_generic_req_ops, d, tag, lun, hba_private);
- return req;
-}
-
-static Property scsi_generic_properties[] = {
- DEFINE_PROP_DRIVE("drive", SCSIDevice, conf.bs),
- DEFINE_PROP_INT32("bootindex", SCSIDevice, conf.bootindex, -1),
- DEFINE_PROP_END_OF_LIST(),
-};
-
-static void scsi_generic_class_initfn(ObjectClass *klass, void *data)
-{
- DeviceClass *dc = DEVICE_CLASS(klass);
- SCSIDeviceClass *sc = SCSI_DEVICE_CLASS(klass);
-
- sc->init = scsi_generic_initfn;
- sc->destroy = scsi_destroy;
- sc->alloc_req = scsi_new_request;
- dc->fw_name = "disk";
- dc->desc = "pass through generic scsi device (/dev/sg*)";
- dc->reset = scsi_generic_reset;
- dc->props = scsi_generic_properties;
- dc->vmsd = &vmstate_scsi_device;
-}
-
-static const TypeInfo scsi_generic_info = {
- .name = "scsi-generic",
- .parent = TYPE_SCSI_DEVICE,
- .instance_size = sizeof(SCSIDevice),
- .class_init = scsi_generic_class_initfn,
-};
-
-static void scsi_generic_register_types(void)
-{
- type_register_static(&scsi_generic_info);
-}
-
-type_init(scsi_generic_register_types)
-
-#endif /* __linux__ */
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