--- /dev/null
+/*
+ * UAS (USB Attached SCSI) emulation
+ *
+ * Copyright Red Hat, Inc. 2012
+ *
+ * Author: Gerd Hoffmann <kraxel@redhat.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ */
+
+#include "qemu-common.h"
+#include "qemu/option.h"
+#include "qemu/config-file.h"
+#include "trace.h"
+#include "qemu/error-report.h"
+
+#include "hw/usb.h"
+#include "hw/usb/desc.h"
+#include "hw/scsi/scsi.h"
+#include "block/scsi.h"
+
+/* --------------------------------------------------------------------- */
+
+#define UAS_UI_COMMAND 0x01
+#define UAS_UI_SENSE 0x03
+#define UAS_UI_RESPONSE 0x04
+#define UAS_UI_TASK_MGMT 0x05
+#define UAS_UI_READ_READY 0x06
+#define UAS_UI_WRITE_READY 0x07
+
+#define UAS_RC_TMF_COMPLETE 0x00
+#define UAS_RC_INVALID_INFO_UNIT 0x02
+#define UAS_RC_TMF_NOT_SUPPORTED 0x04
+#define UAS_RC_TMF_FAILED 0x05
+#define UAS_RC_TMF_SUCCEEDED 0x08
+#define UAS_RC_INCORRECT_LUN 0x09
+#define UAS_RC_OVERLAPPED_TAG 0x0a
+
+#define UAS_TMF_ABORT_TASK 0x01
+#define UAS_TMF_ABORT_TASK_SET 0x02
+#define UAS_TMF_CLEAR_TASK_SET 0x04
+#define UAS_TMF_LOGICAL_UNIT_RESET 0x08
+#define UAS_TMF_I_T_NEXUS_RESET 0x10
+#define UAS_TMF_CLEAR_ACA 0x40
+#define UAS_TMF_QUERY_TASK 0x80
+#define UAS_TMF_QUERY_TASK_SET 0x81
+#define UAS_TMF_QUERY_ASYNC_EVENT 0x82
+
+#define UAS_PIPE_ID_COMMAND 0x01
+#define UAS_PIPE_ID_STATUS 0x02
+#define UAS_PIPE_ID_DATA_IN 0x03
+#define UAS_PIPE_ID_DATA_OUT 0x04
+
+typedef struct {
+ uint8_t id;
+ uint8_t reserved;
+ uint16_t tag;
+} QEMU_PACKED uas_iu_header;
+
+typedef struct {
+ uint8_t prio_taskattr; /* 6:3 priority, 2:0 task attribute */
+ uint8_t reserved_1;
+ uint8_t add_cdb_length; /* 7:2 additional adb length (dwords) */
+ uint8_t reserved_2;
+ uint64_t lun;
+ uint8_t cdb[16];
+ uint8_t add_cdb[];
+} QEMU_PACKED uas_iu_command;
+
+typedef struct {
+ uint16_t status_qualifier;
+ uint8_t status;
+ uint8_t reserved[7];
+ uint16_t sense_length;
+ uint8_t sense_data[18];
+} QEMU_PACKED uas_iu_sense;
+
+typedef struct {
+ uint8_t add_response_info[3];
+ uint8_t response_code;
+} QEMU_PACKED uas_iu_response;
+
+typedef struct {
+ uint8_t function;
+ uint8_t reserved;
+ uint16_t task_tag;
+ uint64_t lun;
+} QEMU_PACKED uas_iu_task_mgmt;
+
+typedef struct {
+ uas_iu_header hdr;
+ union {
+ uas_iu_command command;
+ uas_iu_sense sense;
+ uas_iu_task_mgmt task;
+ uas_iu_response response;
+ };
+} QEMU_PACKED uas_iu;
+
+/* --------------------------------------------------------------------- */
+
+#define UAS_STREAM_BM_ATTR 4
+#define UAS_MAX_STREAMS (1 << UAS_STREAM_BM_ATTR)
+
+typedef struct UASDevice UASDevice;
+typedef struct UASRequest UASRequest;
+typedef struct UASStatus UASStatus;
+
+struct UASDevice {
+ USBDevice dev;
+ SCSIBus bus;
+ QEMUBH *status_bh;
+ QTAILQ_HEAD(, UASStatus) results;
+ QTAILQ_HEAD(, UASRequest) requests;
+
+ /* properties */
+ uint32_t requestlog;
+
+ /* usb 2.0 only */
+ USBPacket *status2;
+ UASRequest *datain2;
+ UASRequest *dataout2;
+
+ /* usb 3.0 only */
+ USBPacket *data3[UAS_MAX_STREAMS + 1];
+ USBPacket *status3[UAS_MAX_STREAMS + 1];
+};
+
+#define TYPE_USB_UAS "usb-uas"
+#define USB_UAS(obj) OBJECT_CHECK(UASDevice, (obj), TYPE_USB_UAS)
+
+struct UASRequest {
+ uint16_t tag;
+ uint64_t lun;
+ UASDevice *uas;
+ SCSIDevice *dev;
+ SCSIRequest *req;
+ USBPacket *data;
+ bool data_async;
+ bool active;
+ bool complete;
+ uint32_t buf_off;
+ uint32_t buf_size;
+ uint32_t data_off;
+ uint32_t data_size;
+ QTAILQ_ENTRY(UASRequest) next;
+};
+
+struct UASStatus {
+ uint32_t stream;
+ uas_iu status;
+ uint32_t length;
+ QTAILQ_ENTRY(UASStatus) next;
+};
+
+/* --------------------------------------------------------------------- */
+
+enum {
+ STR_MANUFACTURER = 1,
+ STR_PRODUCT,
+ STR_SERIALNUMBER,
+ STR_CONFIG_HIGH,
+ STR_CONFIG_SUPER,
+};
+
+static const USBDescStrings desc_strings = {
+ [STR_MANUFACTURER] = "QEMU",
+ [STR_PRODUCT] = "USB Attached SCSI HBA",
+ [STR_SERIALNUMBER] = "27842",
+ [STR_CONFIG_HIGH] = "High speed config (usb 2.0)",
+ [STR_CONFIG_SUPER] = "Super speed config (usb 3.0)",
+};
+
+static const USBDescIface desc_iface_high = {
+ .bInterfaceNumber = 0,
+ .bNumEndpoints = 4,
+ .bInterfaceClass = USB_CLASS_MASS_STORAGE,
+ .bInterfaceSubClass = 0x06, /* SCSI */
+ .bInterfaceProtocol = 0x62, /* UAS */
+ .eps = (USBDescEndpoint[]) {
+ {
+ .bEndpointAddress = USB_DIR_OUT | UAS_PIPE_ID_COMMAND,
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+ .wMaxPacketSize = 512,
+ .extra = (uint8_t[]) {
+ 0x04, /* u8 bLength */
+ 0x24, /* u8 bDescriptorType */
+ UAS_PIPE_ID_COMMAND,
+ 0x00, /* u8 bReserved */
+ },
+ },{
+ .bEndpointAddress = USB_DIR_IN | UAS_PIPE_ID_STATUS,
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+ .wMaxPacketSize = 512,
+ .extra = (uint8_t[]) {
+ 0x04, /* u8 bLength */
+ 0x24, /* u8 bDescriptorType */
+ UAS_PIPE_ID_STATUS,
+ 0x00, /* u8 bReserved */
+ },
+ },{
+ .bEndpointAddress = USB_DIR_IN | UAS_PIPE_ID_DATA_IN,
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+ .wMaxPacketSize = 512,
+ .extra = (uint8_t[]) {
+ 0x04, /* u8 bLength */
+ 0x24, /* u8 bDescriptorType */
+ UAS_PIPE_ID_DATA_IN,
+ 0x00, /* u8 bReserved */
+ },
+ },{
+ .bEndpointAddress = USB_DIR_OUT | UAS_PIPE_ID_DATA_OUT,
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+ .wMaxPacketSize = 512,
+ .extra = (uint8_t[]) {
+ 0x04, /* u8 bLength */
+ 0x24, /* u8 bDescriptorType */
+ UAS_PIPE_ID_DATA_OUT,
+ 0x00, /* u8 bReserved */
+ },
+ },
+ }
+};
+
+static const USBDescIface desc_iface_super = {
+ .bInterfaceNumber = 0,
+ .bNumEndpoints = 4,
+ .bInterfaceClass = USB_CLASS_MASS_STORAGE,
+ .bInterfaceSubClass = 0x06, /* SCSI */
+ .bInterfaceProtocol = 0x62, /* UAS */
+ .eps = (USBDescEndpoint[]) {
+ {
+ .bEndpointAddress = USB_DIR_OUT | UAS_PIPE_ID_COMMAND,
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+ .wMaxPacketSize = 1024,
+ .bMaxBurst = 15,
+ .extra = (uint8_t[]) {
+ 0x04, /* u8 bLength */
+ 0x24, /* u8 bDescriptorType */
+ UAS_PIPE_ID_COMMAND,
+ 0x00, /* u8 bReserved */
+ },
+ },{
+ .bEndpointAddress = USB_DIR_IN | UAS_PIPE_ID_STATUS,
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+ .wMaxPacketSize = 1024,
+ .bMaxBurst = 15,
+ .bmAttributes_super = UAS_STREAM_BM_ATTR,
+ .extra = (uint8_t[]) {
+ 0x04, /* u8 bLength */
+ 0x24, /* u8 bDescriptorType */
+ UAS_PIPE_ID_STATUS,
+ 0x00, /* u8 bReserved */
+ },
+ },{
+ .bEndpointAddress = USB_DIR_IN | UAS_PIPE_ID_DATA_IN,
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+ .wMaxPacketSize = 1024,
+ .bMaxBurst = 15,
+ .bmAttributes_super = UAS_STREAM_BM_ATTR,
+ .extra = (uint8_t[]) {
+ 0x04, /* u8 bLength */
+ 0x24, /* u8 bDescriptorType */
+ UAS_PIPE_ID_DATA_IN,
+ 0x00, /* u8 bReserved */
+ },
+ },{
+ .bEndpointAddress = USB_DIR_OUT | UAS_PIPE_ID_DATA_OUT,
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+ .wMaxPacketSize = 1024,
+ .bMaxBurst = 15,
+ .bmAttributes_super = UAS_STREAM_BM_ATTR,
+ .extra = (uint8_t[]) {
+ 0x04, /* u8 bLength */
+ 0x24, /* u8 bDescriptorType */
+ UAS_PIPE_ID_DATA_OUT,
+ 0x00, /* u8 bReserved */
+ },
+ },
+ }
+};
+
+static const USBDescDevice desc_device_high = {
+ .bcdUSB = 0x0200,
+ .bMaxPacketSize0 = 64,
+ .bNumConfigurations = 1,
+ .confs = (USBDescConfig[]) {
+ {
+ .bNumInterfaces = 1,
+ .bConfigurationValue = 1,
+ .iConfiguration = STR_CONFIG_HIGH,
+ .bmAttributes = USB_CFG_ATT_ONE | USB_CFG_ATT_SELFPOWER,
+ .nif = 1,
+ .ifs = &desc_iface_high,
+ },
+ },
+};
+
+static const USBDescDevice desc_device_super = {
+ .bcdUSB = 0x0300,
+ .bMaxPacketSize0 = 64,
+ .bNumConfigurations = 1,
+ .confs = (USBDescConfig[]) {
+ {
+ .bNumInterfaces = 1,
+ .bConfigurationValue = 1,
+ .iConfiguration = STR_CONFIG_SUPER,
+ .bmAttributes = USB_CFG_ATT_ONE | USB_CFG_ATT_SELFPOWER,
+ .nif = 1,
+ .ifs = &desc_iface_super,
+ },
+ },
+};
+
+static const USBDesc desc = {
+ .id = {
+ .idVendor = 0x46f4, /* CRC16() of "QEMU" */
+ .idProduct = 0x0003,
+ .bcdDevice = 0,
+ .iManufacturer = STR_MANUFACTURER,
+ .iProduct = STR_PRODUCT,
+ .iSerialNumber = STR_SERIALNUMBER,
+ },
+ .high = &desc_device_high,
+ .super = &desc_device_super,
+ .str = desc_strings,
+};
+
+/* --------------------------------------------------------------------- */
+
+static bool uas_using_streams(UASDevice *uas)
+{
+ return uas->dev.speed == USB_SPEED_SUPER;
+}
+
+/* --------------------------------------------------------------------- */
+
+static UASStatus *usb_uas_alloc_status(UASDevice *uas, uint8_t id, uint16_t tag)
+{
+ UASStatus *st = g_new0(UASStatus, 1);
+
+ st->status.hdr.id = id;
+ st->status.hdr.tag = cpu_to_be16(tag);
+ st->length = sizeof(uas_iu_header);
+ if (uas_using_streams(uas)) {
+ st->stream = tag;
+ }
+ return st;
+}
+
+static void usb_uas_send_status_bh(void *opaque)
+{
+ UASDevice *uas = opaque;
+ UASStatus *st;
+ USBPacket *p;
+
+ while ((st = QTAILQ_FIRST(&uas->results)) != NULL) {
+ if (uas_using_streams(uas)) {
+ p = uas->status3[st->stream];
+ uas->status3[st->stream] = NULL;
+ } else {
+ p = uas->status2;
+ uas->status2 = NULL;
+ }
+ if (p == NULL) {
+ break;
+ }
+
+ usb_packet_copy(p, &st->status, st->length);
+ QTAILQ_REMOVE(&uas->results, st, next);
+ g_free(st);
+
+ p->status = USB_RET_SUCCESS; /* Clear previous ASYNC status */
+ usb_packet_complete(&uas->dev, p);
+ }
+}
+
+static void usb_uas_queue_status(UASDevice *uas, UASStatus *st, int length)
+{
+ USBPacket *p = uas_using_streams(uas) ?
+ uas->status3[st->stream] : uas->status2;
+
+ st->length += length;
+ QTAILQ_INSERT_TAIL(&uas->results, st, next);
+ if (p) {
+ /*
+ * Just schedule bh make sure any in-flight data transaction
+ * is finished before completing (sending) the status packet.
+ */
+ qemu_bh_schedule(uas->status_bh);
+ } else {
+ USBEndpoint *ep = usb_ep_get(&uas->dev, USB_TOKEN_IN,
+ UAS_PIPE_ID_STATUS);
+ usb_wakeup(ep, st->stream);
+ }
+}
+
+static void usb_uas_queue_response(UASDevice *uas, uint16_t tag, uint8_t code)
+{
+ UASStatus *st = usb_uas_alloc_status(uas, UAS_UI_RESPONSE, tag);
+
+ trace_usb_uas_response(uas->dev.addr, tag, code);
+ st->status.response.response_code = code;
+ usb_uas_queue_status(uas, st, sizeof(uas_iu_response));
+}
+
+static void usb_uas_queue_sense(UASRequest *req, uint8_t status)
+{
+ UASStatus *st = usb_uas_alloc_status(req->uas, UAS_UI_SENSE, req->tag);
+ int len, slen = 0;
+
+ trace_usb_uas_sense(req->uas->dev.addr, req->tag, status);
+ st->status.sense.status = status;
+ st->status.sense.status_qualifier = cpu_to_be16(0);
+ if (status != GOOD) {
+ slen = scsi_req_get_sense(req->req, st->status.sense.sense_data,
+ sizeof(st->status.sense.sense_data));
+ st->status.sense.sense_length = cpu_to_be16(slen);
+ }
+ len = sizeof(uas_iu_sense) - sizeof(st->status.sense.sense_data) + slen;
+ usb_uas_queue_status(req->uas, st, len);
+}
+
+static void usb_uas_queue_fake_sense(UASDevice *uas, uint16_t tag,
+ struct SCSISense sense)
+{
+ UASStatus *st = usb_uas_alloc_status(uas, UAS_UI_SENSE, tag);
+ int len, slen = 0;
+
+ st->status.sense.status = CHECK_CONDITION;
+ st->status.sense.status_qualifier = cpu_to_be16(0);
+ st->status.sense.sense_data[0] = 0x70;
+ st->status.sense.sense_data[2] = sense.key;
+ st->status.sense.sense_data[7] = 10;
+ st->status.sense.sense_data[12] = sense.asc;
+ st->status.sense.sense_data[13] = sense.ascq;
+ slen = 18;
+ len = sizeof(uas_iu_sense) - sizeof(st->status.sense.sense_data) + slen;
+ usb_uas_queue_status(uas, st, len);
+}
+
+static void usb_uas_queue_read_ready(UASRequest *req)
+{
+ UASStatus *st = usb_uas_alloc_status(req->uas, UAS_UI_READ_READY,
+ req->tag);
+
+ trace_usb_uas_read_ready(req->uas->dev.addr, req->tag);
+ usb_uas_queue_status(req->uas, st, 0);
+}
+
+static void usb_uas_queue_write_ready(UASRequest *req)
+{
+ UASStatus *st = usb_uas_alloc_status(req->uas, UAS_UI_WRITE_READY,
+ req->tag);
+
+ trace_usb_uas_write_ready(req->uas->dev.addr, req->tag);
+ usb_uas_queue_status(req->uas, st, 0);
+}
+
+/* --------------------------------------------------------------------- */
+
+static int usb_uas_get_lun(uint64_t lun64)
+{
+ return (lun64 >> 48) & 0xff;
+}
+
+static SCSIDevice *usb_uas_get_dev(UASDevice *uas, uint64_t lun64)
+{
+ if ((lun64 >> 56) != 0x00) {
+ return NULL;
+ }
+ return scsi_device_find(&uas->bus, 0, 0, usb_uas_get_lun(lun64));
+}
+
+static void usb_uas_complete_data_packet(UASRequest *req)
+{
+ USBPacket *p;
+
+ if (!req->data_async) {
+ return;
+ }
+ p = req->data;
+ req->data = NULL;
+ req->data_async = false;
+ p->status = USB_RET_SUCCESS; /* Clear previous ASYNC status */
+ usb_packet_complete(&req->uas->dev, p);
+}
+
+static void usb_uas_copy_data(UASRequest *req)
+{
+ uint32_t length;
+
+ length = MIN(req->buf_size - req->buf_off,
+ req->data->iov.size - req->data->actual_length);
+ trace_usb_uas_xfer_data(req->uas->dev.addr, req->tag, length,
+ req->data->actual_length, req->data->iov.size,
+ req->buf_off, req->buf_size);
+ usb_packet_copy(req->data, scsi_req_get_buf(req->req) + req->buf_off,
+ length);
+ req->buf_off += length;
+ req->data_off += length;
+
+ if (req->data->actual_length == req->data->iov.size) {
+ usb_uas_complete_data_packet(req);
+ }
+ if (req->buf_size && req->buf_off == req->buf_size) {
+ req->buf_off = 0;
+ req->buf_size = 0;
+ scsi_req_continue(req->req);
+ }
+}
+
+static void usb_uas_start_next_transfer(UASDevice *uas)
+{
+ UASRequest *req;
+
+ if (uas_using_streams(uas)) {
+ return;
+ }
+
+ QTAILQ_FOREACH(req, &uas->requests, next) {
+ if (req->active || req->complete) {
+ continue;
+ }
+ if (req->req->cmd.mode == SCSI_XFER_FROM_DEV && uas->datain2 == NULL) {
+ uas->datain2 = req;
+ usb_uas_queue_read_ready(req);
+ req->active = true;
+ return;
+ }
+ if (req->req->cmd.mode == SCSI_XFER_TO_DEV && uas->dataout2 == NULL) {
+ uas->dataout2 = req;
+ usb_uas_queue_write_ready(req);
+ req->active = true;
+ return;
+ }
+ }
+}
+
+static UASRequest *usb_uas_alloc_request(UASDevice *uas, uas_iu *iu)
+{
+ UASRequest *req;
+
+ req = g_new0(UASRequest, 1);
+ req->uas = uas;
+ req->tag = be16_to_cpu(iu->hdr.tag);
+ req->lun = be64_to_cpu(iu->command.lun);
+ req->dev = usb_uas_get_dev(req->uas, req->lun);
+ return req;
+}
+
+static void usb_uas_scsi_free_request(SCSIBus *bus, void *priv)
+{
+ UASRequest *req = priv;
+ UASDevice *uas = req->uas;
+
+ if (req == uas->datain2) {
+ uas->datain2 = NULL;
+ }
+ if (req == uas->dataout2) {
+ uas->dataout2 = NULL;
+ }
+ QTAILQ_REMOVE(&uas->requests, req, next);
+ g_free(req);
+ usb_uas_start_next_transfer(uas);
+}
+
+static UASRequest *usb_uas_find_request(UASDevice *uas, uint16_t tag)
+{
+ UASRequest *req;
+
+ QTAILQ_FOREACH(req, &uas->requests, next) {
+ if (req->tag == tag) {
+ return req;
+ }
+ }
+ return NULL;
+}
+
+static void usb_uas_scsi_transfer_data(SCSIRequest *r, uint32_t len)
+{
+ UASRequest *req = r->hba_private;
+
+ trace_usb_uas_scsi_data(req->uas->dev.addr, req->tag, len);
+ req->buf_off = 0;
+ req->buf_size = len;
+ if (req->data) {
+ usb_uas_copy_data(req);
+ } else {
+ usb_uas_start_next_transfer(req->uas);
+ }
+}
+
+static void usb_uas_scsi_command_complete(SCSIRequest *r,
+ uint32_t status, size_t resid)
+{
+ UASRequest *req = r->hba_private;
+
+ trace_usb_uas_scsi_complete(req->uas->dev.addr, req->tag, status, resid);
+ req->complete = true;
+ if (req->data) {
+ usb_uas_complete_data_packet(req);
+ }
+ usb_uas_queue_sense(req, status);
+ scsi_req_unref(req->req);
+}
+
+static void usb_uas_scsi_request_cancelled(SCSIRequest *r)
+{
+ UASRequest *req = r->hba_private;
+
+ /* FIXME: queue notification to status pipe? */
+ scsi_req_unref(req->req);
+}
+
+static const struct SCSIBusInfo usb_uas_scsi_info = {
+ .tcq = true,
+ .max_target = 0,
+ .max_lun = 255,
+
+ .transfer_data = usb_uas_scsi_transfer_data,
+ .complete = usb_uas_scsi_command_complete,
+ .cancel = usb_uas_scsi_request_cancelled,
+ .free_request = usb_uas_scsi_free_request,
+};
+
+/* --------------------------------------------------------------------- */
+
+static void usb_uas_handle_reset(USBDevice *dev)
+{
+ UASDevice *uas = USB_UAS(dev);
+ UASRequest *req, *nreq;
+ UASStatus *st, *nst;
+
+ trace_usb_uas_reset(dev->addr);
+ QTAILQ_FOREACH_SAFE(req, &uas->requests, next, nreq) {
+ scsi_req_cancel(req->req);
+ }
+ QTAILQ_FOREACH_SAFE(st, &uas->results, next, nst) {
+ QTAILQ_REMOVE(&uas->results, st, next);
+ g_free(st);
+ }
+}
+
+static void usb_uas_handle_control(USBDevice *dev, USBPacket *p,
+ int request, int value, int index, int length, uint8_t *data)
+{
+ int ret;
+
+ ret = usb_desc_handle_control(dev, p, request, value, index, length, data);
+ if (ret >= 0) {
+ return;
+ }
+ error_report("%s: unhandled control request", __func__);
+ p->status = USB_RET_STALL;
+}
+
+static void usb_uas_cancel_io(USBDevice *dev, USBPacket *p)
+{
+ UASDevice *uas = USB_UAS(dev);
+ UASRequest *req, *nreq;
+ int i;
+
+ if (uas->status2 == p) {
+ uas->status2 = NULL;
+ qemu_bh_cancel(uas->status_bh);
+ return;
+ }
+ if (uas_using_streams(uas)) {
+ for (i = 0; i <= UAS_MAX_STREAMS; i++) {
+ if (uas->status3[i] == p) {
+ uas->status3[i] = NULL;
+ return;
+ }
+ if (uas->data3[i] == p) {
+ uas->data3[i] = NULL;
+ return;
+ }
+ }
+ }
+ QTAILQ_FOREACH_SAFE(req, &uas->requests, next, nreq) {
+ if (req->data == p) {
+ req->data = NULL;
+ return;
+ }
+ }
+ assert(!"canceled usb packet not found");
+}
+
+static void usb_uas_command(UASDevice *uas, uas_iu *iu)
+{
+ UASRequest *req;
+ uint32_t len;
+ uint16_t tag = be16_to_cpu(iu->hdr.tag);
+
+ if (uas_using_streams(uas) && tag > UAS_MAX_STREAMS) {
+ goto invalid_tag;
+ }
+ req = usb_uas_find_request(uas, tag);
+ if (req) {
+ goto overlapped_tag;
+ }
+ req = usb_uas_alloc_request(uas, iu);
+ if (req->dev == NULL) {
+ goto bad_target;
+ }
+
+ trace_usb_uas_command(uas->dev.addr, req->tag,
+ usb_uas_get_lun(req->lun),
+ req->lun >> 32, req->lun & 0xffffffff);
+ QTAILQ_INSERT_TAIL(&uas->requests, req, next);
+ if (uas_using_streams(uas) && uas->data3[req->tag] != NULL) {
+ req->data = uas->data3[req->tag];
+ req->data_async = true;
+ uas->data3[req->tag] = NULL;
+ }
+
+ req->req = scsi_req_new(req->dev, req->tag,
+ usb_uas_get_lun(req->lun),
+ iu->command.cdb, req);
+ if (uas->requestlog) {
+ scsi_req_print(req->req);
+ }
+ len = scsi_req_enqueue(req->req);
+ if (len) {
+ req->data_size = len;
+ scsi_req_continue(req->req);
+ }
+ return;
+
+invalid_tag:
+ usb_uas_queue_fake_sense(uas, tag, sense_code_INVALID_TAG);
+ return;
+
+overlapped_tag:
+ usb_uas_queue_fake_sense(uas, tag, sense_code_OVERLAPPED_COMMANDS);
+ return;
+
+bad_target:
+ usb_uas_queue_fake_sense(uas, tag, sense_code_LUN_NOT_SUPPORTED);
+ g_free(req);
+}
+
+static void usb_uas_task(UASDevice *uas, uas_iu *iu)
+{
+ uint16_t tag = be16_to_cpu(iu->hdr.tag);
+ uint64_t lun64 = be64_to_cpu(iu->task.lun);
+ SCSIDevice *dev = usb_uas_get_dev(uas, lun64);
+ int lun = usb_uas_get_lun(lun64);
+ UASRequest *req;
+ uint16_t task_tag;
+
+ if (uas_using_streams(uas) && tag > UAS_MAX_STREAMS) {
+ goto invalid_tag;
+ }
+ req = usb_uas_find_request(uas, be16_to_cpu(iu->hdr.tag));
+ if (req) {
+ goto overlapped_tag;
+ }
+ if (dev == NULL) {
+ goto incorrect_lun;
+ }
+
+ switch (iu->task.function) {
+ case UAS_TMF_ABORT_TASK:
+ task_tag = be16_to_cpu(iu->task.task_tag);
+ trace_usb_uas_tmf_abort_task(uas->dev.addr, tag, task_tag);
+ req = usb_uas_find_request(uas, task_tag);
+ if (req && req->dev == dev) {
+ scsi_req_cancel(req->req);
+ }
+ usb_uas_queue_response(uas, tag, UAS_RC_TMF_COMPLETE);
+ break;
+
+ case UAS_TMF_LOGICAL_UNIT_RESET:
+ trace_usb_uas_tmf_logical_unit_reset(uas->dev.addr, tag, lun);
+ qdev_reset_all(&dev->qdev);
+ usb_uas_queue_response(uas, tag, UAS_RC_TMF_COMPLETE);
+ break;
+
+ default:
+ trace_usb_uas_tmf_unsupported(uas->dev.addr, tag, iu->task.function);
+ usb_uas_queue_response(uas, tag, UAS_RC_TMF_NOT_SUPPORTED);
+ break;
+ }
+ return;
+
+invalid_tag:
+ usb_uas_queue_response(uas, tag, UAS_RC_INVALID_INFO_UNIT);
+ return;
+
+overlapped_tag:
+ usb_uas_queue_response(uas, req->tag, UAS_RC_OVERLAPPED_TAG);
+ return;
+
+incorrect_lun:
+ usb_uas_queue_response(uas, tag, UAS_RC_INCORRECT_LUN);
+}
+
+static void usb_uas_handle_data(USBDevice *dev, USBPacket *p)
+{
+ UASDevice *uas = USB_UAS(dev);
+ uas_iu iu;
+ UASStatus *st;
+ UASRequest *req;
+ int length;
+
+ switch (p->ep->nr) {
+ case UAS_PIPE_ID_COMMAND:
+ length = MIN(sizeof(iu), p->iov.size);
+ usb_packet_copy(p, &iu, length);
+ switch (iu.hdr.id) {
+ case UAS_UI_COMMAND:
+ usb_uas_command(uas, &iu);
+ break;
+ case UAS_UI_TASK_MGMT:
+ usb_uas_task(uas, &iu);
+ break;
+ default:
+ error_report("%s: unknown command iu: id 0x%x",
+ __func__, iu.hdr.id);
+ p->status = USB_RET_STALL;
+ break;
+ }
+ break;
+ case UAS_PIPE_ID_STATUS:
+ if (p->stream) {
+ QTAILQ_FOREACH(st, &uas->results, next) {
+ if (st->stream == p->stream) {
+ break;
+ }
+ }
+ if (st == NULL) {
+ assert(uas->status3[p->stream] == NULL);
+ uas->status3[p->stream] = p;
+ p->status = USB_RET_ASYNC;
+ break;
+ }
+ } else {
+ st = QTAILQ_FIRST(&uas->results);
+ if (st == NULL) {
+ assert(uas->status2 == NULL);
+ uas->status2 = p;
+ p->status = USB_RET_ASYNC;
+ break;
+ }
+ }
+ usb_packet_copy(p, &st->status, st->length);
+ QTAILQ_REMOVE(&uas->results, st, next);
+ g_free(st);
+ break;
+ case UAS_PIPE_ID_DATA_IN:
+ case UAS_PIPE_ID_DATA_OUT:
+ if (p->stream) {
+ req = usb_uas_find_request(uas, p->stream);
+ } else {
+ req = (p->ep->nr == UAS_PIPE_ID_DATA_IN)
+ ? uas->datain2 : uas->dataout2;
+ }
+ if (req == NULL) {
+ if (p->stream) {
+ assert(uas->data3[p->stream] == NULL);
+ uas->data3[p->stream] = p;
+ p->status = USB_RET_ASYNC;
+ break;
+ } else {
+ error_report("%s: no inflight request", __func__);
+ p->status = USB_RET_STALL;
+ break;
+ }
+ }
+ scsi_req_ref(req->req);
+ req->data = p;
+ usb_uas_copy_data(req);
+ if (p->actual_length == p->iov.size || req->complete) {
+ req->data = NULL;
+ } else {
+ req->data_async = true;
+ p->status = USB_RET_ASYNC;
+ }
+ scsi_req_unref(req->req);
+ usb_uas_start_next_transfer(uas);
+ break;
+ default:
+ error_report("%s: invalid endpoint %d", __func__, p->ep->nr);
+ p->status = USB_RET_STALL;
+ break;
+ }
+}
+
+static void usb_uas_handle_destroy(USBDevice *dev)
+{
+ UASDevice *uas = USB_UAS(dev);
+
+ qemu_bh_delete(uas->status_bh);
+}
+
+static void usb_uas_realize(USBDevice *dev, Error **errp)
+{
+ UASDevice *uas = USB_UAS(dev);
+
+ usb_desc_create_serial(dev);
+ usb_desc_init(dev);
+
+ QTAILQ_INIT(&uas->results);
+ QTAILQ_INIT(&uas->requests);
+ uas->status_bh = qemu_bh_new(usb_uas_send_status_bh, uas);
+
+ scsi_bus_new(&uas->bus, sizeof(uas->bus), DEVICE(dev),
+ &usb_uas_scsi_info, NULL);
+}
+
+static const VMStateDescription vmstate_usb_uas = {
+ .name = "usb-uas",
+ .unmigratable = 1,
+ .fields = (VMStateField[]) {
+ VMSTATE_USB_DEVICE(dev, UASDevice),
+ VMSTATE_END_OF_LIST()
+ }
+};
+
+static Property uas_properties[] = {
+ DEFINE_PROP_UINT32("log-scsi-req", UASDevice, requestlog, 0),
+ DEFINE_PROP_END_OF_LIST(),
+};
+
+static void usb_uas_class_initfn(ObjectClass *klass, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(klass);
+ USBDeviceClass *uc = USB_DEVICE_CLASS(klass);
+
+ uc->realize = usb_uas_realize;
+ uc->product_desc = desc_strings[STR_PRODUCT];
+ uc->usb_desc = &desc;
+ uc->cancel_packet = usb_uas_cancel_io;
+ uc->handle_attach = usb_desc_attach;
+ uc->handle_reset = usb_uas_handle_reset;
+ uc->handle_control = usb_uas_handle_control;
+ uc->handle_data = usb_uas_handle_data;
+ uc->handle_destroy = usb_uas_handle_destroy;
+ set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
+ dc->fw_name = "storage";
+ dc->vmsd = &vmstate_usb_uas;
+ dc->props = uas_properties;
+}
+
+static const TypeInfo uas_info = {
+ .name = TYPE_USB_UAS,
+ .parent = TYPE_USB_DEVICE,
+ .instance_size = sizeof(UASDevice),
+ .class_init = usb_uas_class_initfn,
+};
+
+static void usb_uas_register_types(void)
+{
+ type_register_static(&uas_info);
+}
+
+type_init(usb_uas_register_types)
Code Review / kvmfornfv.git / blobdiff