112 	CX18_DEBUG_API("%s: req %#010x ack %#010x cmd %#010x err %#010x args%s\n",  in dump_mb()
113 		       name, mb->request, mb->ack, mb->cmd, mb->error,  in dump_mb()
397 		CX18_WARN("Unhandled RPU (%d) for command %x ack\n",  in mb_ack_irq()
403 	/* Don't ack if the RPU has gotten impatient and timed us out */  in mb_ack_irq()
405 	    req == cx18_readl(cx, &ack_mb->ack)) {  in mb_ack_irq()
406 …CX18_DEBUG_WARN("Possibly falling behind: %s self-ack'ed our incoming %s to EPU mailbox (sequence …  in mb_ack_irq()
411 	cx18_writel(cx, req, &ack_mb->ack);  in mb_ack_irq()
553 	/* mb->request and mb->ack.  N.B. we want to read mb->ack last */  in cx18_api_epu_cmd_irq()
557 	if (order_mb->request == order_mb->ack) {  in cx18_api_epu_cmd_irq()
558 …CX18_DEBUG_WARN("Possibly falling behind: %s self-ack'ed our incoming %s to EPU mailbox (sequence …  in cx18_api_epu_cmd_irq()
566 	 * Individual EPU command processing is responsible for ack-ing  in cx18_api_epu_cmd_irq()
583 	u32 irq, req, ack, err;  in cx18_api_call()  local
631 	 * If the XPU is responding with Ack's, the mailbox shouldn't be in  in cx18_api_call()
634 	 * If the wait for ack after sending a previous command was interrupted  in cx18_api_call()
636 	 * mark it "not busy" from our end, if the XPU hasn't ack'ed it still.  in cx18_api_call()
641 				 (ack = cx18_readl(cx, &mb->ack)) == req,  in cx18_api_call()
643 	if (req != ack) {  in cx18_api_call()
645 		cx18_writel(cx, req, &mb->ack);  in cx18_api_call()
660 	cx18_writel(cx, req - 1, &mb->ack); /* ensure ack & req are distinct */  in cx18_api_call()
663 	 * Notify the XPU and wait for it to send an Ack back  in cx18_api_call()
675 	ack = cx18_readl(cx, &mb->ack);  in cx18_api_call()
676 	if (ack != req) {  in cx18_api_call()
679 		ack = cx18_readl(cx, &mb->ack);  in cx18_api_call()
686 	if (req != ack) {  in cx18_api_call()
693 …woken up before mailbox ack was ready after submitting %s to RPU.  only waited %d msecs on req %u …  in cx18_api_call()
696 					req, ack);  in cx18_api_call()