usb_pipe_get_max_bulk_traKernelsFunctiousb_pipe_get_max_bulk_transfer_size(9F)NAMEusb_pipe_get_max_bulk_transfer_size - Get maximum bulk transfer size
SYNOPSIS
#include <sys/usb/usba.h>
int usb_pipe_get_max_bulk_transfer_size(dev_info_t dip, size_t *size);
INTERFACE LEVEL
Solaris DDI specific (Solaris DDI)
PARAMETERS
dip Pointer to the device's dev_info structure.
size Returns the bulk transfer size.
DESCRIPTION
The usb_pipe_get_max_bulk_transfer_size() function returns the maximum
data transfer size in bytes that the host controller driver can support
per bulk request. This information can be used to limit or break down
larger requests to manageable sizes.
RETURN VALUES
USB_SUCCESS
Size is returned in size argument.
USB_INVALID_ARGS
dip and/or size argument is NULL.
USB_FAILURE
Size could not be returned. Zero is returned in size arg.
CONTEXT
May be called from user, kernel or interrupt context.
EXAMPLES
int xxx_attach(dev_info_t *dip, int command)
{
...
usb_pipe_get_max_bulk_transfer_size(dip, &state>max_xfer_size);
...
}
void xxx_minphys(struct buf bp)
{
...
if (bp->b_bcount > state->max_xfer_size) {
bp->b_bcount = state->max_xfer_size;
}
...
}
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_pipe_bulk_xfer(9F), usb_alloc_request(9F),
usb_bulk_request(9S)SunOS 5.10 5 Janusb_pipe_get_max_bulk_transfer_size(9F)
