C++ (Cpp) HS_USECS_ISO 예제들

예제 #1

/* how many of the uframe's 125 usecs are allocated? */
static unsigned short
periodic_usecs (struct ehci_hcd *ehci, unsigned frame, unsigned uframe)
{
	__le32			*hw_p = &ehci->periodic [frame];
	union ehci_shadow	*q = &ehci->pshadow [frame];
	unsigned		usecs = 0;

	while (q->ptr) {
		switch (Q_NEXT_TYPE (*hw_p)) {
		case Q_TYPE_QH:
			/* is it in the S-mask? */
			if (q->qh->hw_info2 & cpu_to_le32 (1 << uframe))
				usecs += q->qh->usecs;
			/* ... or C-mask? */
			if (q->qh->hw_info2 & cpu_to_le32 (1 << (8 + uframe)))
				usecs += q->qh->c_usecs;
			hw_p = &q->qh->hw_next;
			q = &q->qh->qh_next;
			break;
		case Q_TYPE_FSTN:
			/* for "save place" FSTNs, count the relevant INTR
			 * bandwidth from the previous frame
			 */
			if (q->fstn->hw_prev != EHCI_LIST_END) {
				ehci_dbg (ehci, "ignoring FSTN cost ...\n");
			}
			hw_p = &q->fstn->hw_next;
			q = &q->fstn->fstn_next;
			break;
		case Q_TYPE_ITD:
			usecs += q->itd->usecs [uframe];
			hw_p = &q->itd->hw_next;
			q = &q->itd->itd_next;
			break;
		case Q_TYPE_SITD:
			/* is it in the S-mask?  (count SPLIT, DATA) */
			if (q->sitd->hw_uframe & cpu_to_le32 (1 << uframe)) {
				if (q->sitd->hw_fullspeed_ep &
						__constant_cpu_to_le32 (1<<31))
					usecs += q->sitd->stream->usecs;
				else	/* worst case for OUT start-split */
					usecs += HS_USECS_ISO (188);
			}

			/* ... C-mask?  (count CSPLIT, DATA) */
			if (q->sitd->hw_uframe &
					cpu_to_le32 (1 << (8 + uframe))) {
				/* worst case for IN complete-split */
				usecs += q->sitd->stream->c_usecs;
			}

			hw_p = &q->sitd->hw_next;
			q = &q->sitd->sitd_next;
			break;
		default:
			BUG ();
		}
	}
#ifdef	DEBUG
	if (usecs > 100)
		err ("overallocated uframe %d, periodic is %d usecs",
			frame * 8 + uframe, usecs);
#endif
	return usecs;
}

예제 #2

static unsigned short
periodic_usecs (struct ehci_hcd *ehci, unsigned frame, unsigned uframe)
{
	__hc32			*hw_p = &ehci->periodic [frame];
	union ehci_shadow	*q = &ehci->pshadow [frame];
	unsigned		usecs = 0;
	struct ehci_qh_hw	*hw;

	while (q->ptr) {
		switch (hc32_to_cpu(ehci, Q_NEXT_TYPE(ehci, *hw_p))) {
		case Q_TYPE_QH:
			hw = q->qh->hw;
			
			if (hw->hw_info2 & cpu_to_hc32(ehci, 1 << uframe))
				usecs += q->qh->usecs;
			
			if (hw->hw_info2 & cpu_to_hc32(ehci,
					1 << (8 + uframe)))
				usecs += q->qh->c_usecs;
			hw_p = &hw->hw_next;
			q = &q->qh->qh_next;
			break;
		
		default:
			
			if (q->fstn->hw_prev != EHCI_LIST_END(ehci)) {
				ehci_dbg (ehci, "ignoring FSTN cost ...\n");
			}
			hw_p = &q->fstn->hw_next;
			q = &q->fstn->fstn_next;
			break;
		case Q_TYPE_ITD:
			if (q->itd->hw_transaction[uframe])
				usecs += q->itd->stream->usecs;
			hw_p = &q->itd->hw_next;
			q = &q->itd->itd_next;
			break;
		case Q_TYPE_SITD:
			
			if (q->sitd->hw_uframe & cpu_to_hc32(ehci,
					1 << uframe)) {
				if (q->sitd->hw_fullspeed_ep &
						cpu_to_hc32(ehci, 1<<31))
					usecs += q->sitd->stream->usecs;
				else	
					usecs += HS_USECS_ISO (188);
			}

			
			if (q->sitd->hw_uframe &
					cpu_to_hc32(ehci, 1 << (8 + uframe))) {
				
				usecs += q->sitd->stream->c_usecs;
			}

			hw_p = &q->sitd->hw_next;
			q = &q->sitd->sitd_next;
			break;
		}
	}
#ifdef	DEBUG
	if (usecs > 100)
		ehci_err (ehci, "uframe %d sched overrun: %d usecs\n",
			frame * 8 + uframe, usecs);
#endif
	return usecs;
}