'\" te
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.TH USB_PIPE_BULK_XFER 9F "Sep 16, 2016"
.SH NAME
usb_pipe_bulk_xfer \- USB bulk transfer function
.SH SYNOPSIS
.nf
#include <sys/usb/usba.h>



\fBint\fR \fBusb_pipe_bulk_xfer\fR(\fBusb_pipe_handle_t\fR \fIpipe_handle\fR,
     \fBusb_bulk_req_t *\fR\fIrequest\fR, \fBusb_flags_t\fR \fIflags\fR);
.fi

.SH INTERFACE LEVEL
illumos DDI specific (illumos DDI)
.SH PARAMETERS
.ne 2
.na
\fB\fIpipe_handle\fR\fR
.ad
.RS 15n
Bulk pipe handle on which request is made.
.RE

.sp
.ne 2
.na
\fB\fIrequest\fR\fR
.ad
.RS 15n
Pointer to bulk transfer request.
.RE

.sp
.ne 2
.na
\fB\fIflags\fR\fR
.ad
.RS 15n
USB_FLAGS_SLEEP is the only flag recognized. Wait for request to complete.
.RE

.SH DESCRIPTION
The \fBusb_pipe_bulk_xfer()\fR function requests the USBA framework to perform
a transfer through a USB bulk pipe. The request is passed to the host
controller driver (HCD), which performs the necessary transactions to complete
the request. Requests are synchronous when USB_FLAGS_SLEEP has been specified
in flags. Calls for synchronous requests will not return until their
transaction has completed. Asynchronous requests (made without specifying the
USB_FLAGS_SLEEP flag) notify the caller of their completion via a callback
function.
.sp
.LP
Requests for bulk transfers must have mblks attached to store data. Allocate an
mblk for data when a request is allocated via \fBusb_alloc_bulk_req\fR(9F) by
passing a non-negative value for the \fIlen\fR argument.
.SH RETURN VALUES
.ne 2
.na
\fBUSB_SUCCESS\fR
.ad
.RS 25n
Transfer was successful.
.RE

.sp
.ne 2
.na
\fBUSB_INVALID_ARGS\fR
.ad
.RS 25n
Request is \fBNULL\fR.
.RE

.sp
.ne 2
.na
\fBUSB_INVALID_CONTEXT\fR
.ad
.RS 25n
Called from interrupt context with the USB_FLAGS_SLEEP flag set.
.RE

.sp
.ne 2
.na
\fBUSB_INVALID_REQUEST\fR
.ad
.RS 25n
The request has been freed or otherwise invalidated.
.sp
A set of conflicting attributes were specified. See \fBusb_bulk_request\fR(9S).
.sp
The normal and/or exception callback was NULL and USB_FLAGS_SLEEP was not set.
.sp
Data space is not provided to a non-zero length bulk request:
.sp
.in +2
.nf
(bulk_data == NULL and bulk_len != 0)
.fi
.in -2

.RE

.sp
.ne 2
.na
\fBUSB_INVALID_PIPE\fR
.ad
.RS 25n
Pipe handle is NULL or invalid.
.sp
Pipe is closing or closed.
.RE

.sp
.ne 2
.na
\fBUSB_PIPE_ERROR\fR
.ad
.RS 25n
Pipe handle refers to a pipe which is in the USB_PIPE_STATE_ERROR state.
.RE

.sp
.ne 2
.na
\fBUSB_NO_RESOURCES\fR
.ad
.RS 25n
Memory, descriptors or other resources are unavailable.
.RE

.sp
.ne 2
.na
\fBUSB_HC_HARDWARE_ERROR\fR
.ad
.RS 25n
Host controller is in error state.
.RE

.sp
.ne 2
.na
\fBUSB_FAILURE\fR
.ad
.RS 25n
An asynchronous transfer failed or an internal error occurred.
.sp
A bulk request requested too much data:
.sp
.in +2
.nf
(length > usb_get_max_bulk_xfer size())
.fi
.in -2

The pipe is in a unsuitable state (error, busy, not ready).
.RE

.sp
.LP
Additional status information may be available in the bulk_completion_reason
and bulk_cb_flags fields of the request. Please see
\fBusb_completion_reason\fR(9S) and \fBusb_callback_flags\fR(9S) for more
information.
.SH CONTEXT
May be called from kernel or user context without regard to arguments. May be
called from interrupt context only when the USB_FLAGS_SLEEP flag is clear.
.SH EXAMPLES
.in +2
.nf
   /* Allocate, initialize and issue a synchronous bulk request. */

    usb_bulk_req_t bulk_req;
    mblk_t *mblk;

    bulk_req = usb_alloc_bulk_req(dip, bp->b_bcount, USB_FLAGS_SLEEP);

    bulk_req->bulk_attributes   = USB_ATTRS_AUTOCLEARING;
    mblk = bulk_req->bulk_data;
    bcopy(buffer, mblk->b_wptr, bp->b_bcount);
    mblk->b_wptr += bp->b_bcount;

    if ((rval = usb_pipe_bulk_xfer(pipe, bulk_req, USB_FLAGS_SLEEP))
        != USB_SUCCESS) {
            cmn_err (CE_WARN, "%s%d: Error writing bulk data.",
                ddi_driver_name(dip), ddi_get_instance(dip));
    }

.fi
.in -2

.SH ATTRIBUTES
See \fBattributes\fR(7) for descriptions of the following attributes:
.sp

.sp
.TS
box;
c | c
l | l .
ATTRIBUTE TYPE	ATTRIBUTE VALUE
_
Architecture	PCI-based systems
_
Interface stability	Committed
.TE

.SH SEE ALSO
.BR attributes (7),
.BR usb_alloc_request (9F),
.BR usb_get_cfg (9F),
.BR usb_get_status (9F),
.BR usb_pipe_ctrl_xfer (9F),
.BR usb_pipe_get_state (9F),
.BR usb_pipe_intr_xfer (9F),
.BR usb_pipe_isoc_xfer (9F),
.BR usb_pipe_reset (9F),
.BR usb_pipe_xopen (9F),
.BR usb_bulk_request (9S),
.BR usb_callback_flags (9S),
.BR usb_completion_reason (9S),
.BR usb_ctrl_request (9S),
.BR usb_intr_request (9S),
.BR usb_isoc_request (9S)