firmware/arm_scmi/virtio.c

92  * @poll_idx: Last used index registered for polling purposes if this message
93  *	      transaction reply was configured for polling.
94  * @poll_status: Polling state for this message.
97  *	   freeing (and reuse) when polling and IRQ execution paths interleave.
328 	 * polling for some other messages: this worker is in charge to process  in scmi_vio_deferred_tx_worker()
333 	/* Scan the list of possibly pre-fetched messages during polling. */  in scmi_vio_deferred_tx_worker()
429 	/* Setup a deferred worker for polling. */  in virtio_chan_setup()
523 	 * If polling was requested for this transaction:  in virtio_send_message()
524 	 *  - retrieve last used index (will be used as polling reference)  in virtio_send_message()
580  * Free only completed polling transfer messages.
606  * dequeued on some other polling path.
643  * virtio_poll_done  - Provide polling support for VirtIO transport
648  * VirtIO core provides a polling mechanism based only on last used indexes:
652  * arrived message descriptor with the one we are polling on.
660  * freshly received used buffers until we found the one we were polling on, or,
662  * in the vqueue at the end of the polling loop (possible due to inherent races
671  * the message we are polling for could be alternatively delivered via usual
673  * are actively polling for it here: in such a case it will be handled as such
674  * by scmi_rx_callback() and the polling loop in the SCMI Core TX path will be
677  * Return: True once polling has successfully completed.
692 	 * Processed already by other polling loop on another CPU ?  in virtio_poll_done()
700 	 * any other possible changes made concurrently by other polling loops  in virtio_poll_done()
704 	 * initial part of the polling loop.  in virtio_poll_done()
741 		/* Is the message we were polling for ? */  in virtio_poll_done()
770 	 * When the polling loop has successfully terminated if something  in virtio_poll_done()
774 	 * If we are still looking for the polled reply, the polling index has  in virtio_poll_done()