usb_pipe_bulk_xfer(9F) Kernel Functions for Drivers usb_pipe_bulk_xfer(9F)NAMEusb_pipe_bulk_xfer - USB bulk transfer function
SYNOPSIS
#include <sys/usb/usba.h>
int usb_pipe_bulk_xfer(usb_pipe_handle_t pipe_handle, usb_bulk_req_t
*request, usb_flags_t flags);
INTERFACE LEVEL
Solaris DDI specific (Solaris DDI)
PARAMETERS
pipe_handle
Bulk pipe handle on which request is made.
request
Pointer to bulk transfer request.
flags
USB_FLAGS_SLEEP is the only flag recognized. Wait for request to
complete.
DESCRIPTION
The usb_pipe_bulk_xfer() function requests the USBA framework to per‐
form 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.
Requests for bulk transfers must have mblks attached to store data.
Allocate an mblk for data when a request is allocated via
usb_alloc_bulk_req(9F) by passing a positive value for the len argu‐
ment.
RETURN VALUES
USB_SUCCESS
Transfer was successful.
USB_INVALID_ARGS
Request is NULL.
USB_INVALID_CONTEXT
Called from interrupt context with the USB_FLAGS_SLEEP flag set.
USB_INVALID_REQUEST
The request has been freed or otherwise invalidated.
A set of conflicting attributes were specified. See
usb_bulk_request(9S).
The normal and/or exception callback was NULL and USB_FLAGS_SLEEP
was not set.
Data space is not provided to a bulk request:
(bulk_data = NULL or bulk_len = 0)
USB_INVALID_PIPE
Pipe handle is NULL or invalid.
Pipe is closing or closed.
USB_PIPE_ERROR
Pipe handle refers to a pipe which is in the USB_PIPE_STATE_ERROR
state.
USB_NO_RESOURCES
Memory, descriptors or other resources are unavailable.
USB_HC_HARDWARE_ERROR
Host controller is in error state.
USB_FAILURE
An asynchronous transfer failed or an internal error occurred.
A bulk request requested too much data:
(length > usb_get_max_bulk_xfer size())
The pipe is in a unsuitable state (error, busy, not ready).
Additional status information may be available in the bulk_comple‐
tion_reason and bulk_cb_flags fields of the request. Please see
usb_completion_reason(9S) and usb_callback_flags(9S) for more informa‐
tion.
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.
EXAMPLES
/* 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));
}
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
┌─────────────────────────────┬─────────────────────────────┐
│ ATTRIBUTE TYPE │ ATTRIBUTE VALUE │
├─────────────────────────────┼─────────────────────────────┤
│Architecture │PCI-based systems │
├─────────────────────────────┼─────────────────────────────┤
│Interface stability │Evolving │
├─────────────────────────────┼─────────────────────────────┤
│Availability │SUNWusb │
└─────────────────────────────┴─────────────────────────────┘
SEE ALSOattributes(5), usb_alloc_request(9F), usb_get_cfg(9F), usb_get_sta‐
tus(9F), usb_pipe_ctrl_xfer(9F), usb_pipe_get_state(9F),
usb_pipe_intr_xfer(9F), usb_pipe_isoc_xfer(9F), usb_pipe_open(9F),
usb_pipe_reset(9F), usb_bulk_request(9S), usb_callback_flags(9S),
usb_completion_reason(9S), usb_ctrl_request(9S), usb_intr_request(9S),
usb_isoc_request(9S)SunOS 5.10 5 Jan 2004 usb_pipe_bulk_xfer(9F)
