9 #include <linux/can/rx-offload.h>
24 can_rx_offload_le(struct can_rx_offload *offload,  in can_rx_offload_le()  argument
27 	if (offload->inc)  in can_rx_offload_le()
34 can_rx_offload_inc(struct can_rx_offload *offload, unsigned int *val)  in can_rx_offload_inc()  argument
36 	if (offload->inc)  in can_rx_offload_inc()
44 	struct can_rx_offload *offload = container_of(napi,  in can_rx_offload_napi_poll()  local
47 	struct net_device *dev = offload->dev;  in can_rx_offload_napi_poll()
53 	       (skb = skb_dequeue(&offload->skb_queue))) {  in can_rx_offload_napi_poll()
66 		if (!skb_queue_empty(&offload->skb_queue))  in can_rx_offload_napi_poll()
67 			napi_reschedule(&offload->napi);  in can_rx_offload_napi_poll()
70 	can_led_event(offload->dev, CAN_LED_EVENT_RX);  in can_rx_offload_napi_poll()
120  * @offload: pointer to rx_offload context
140 can_rx_offload_offload_one(struct can_rx_offload *offload, unsigned int n)  in can_rx_offload_offload_one()  argument
148 	if (unlikely(skb_queue_len(&offload->skb_queue) >  in can_rx_offload_offload_one()
149 		     offload->skb_queue_len_max))  in can_rx_offload_offload_one()
152 	skb = offload->mailbox_read(offload, n, &timestamp, drop);  in can_rx_offload_offload_one()
161 		offload->dev->stats.rx_dropped++;  in can_rx_offload_offload_one()
162 		offload->dev->stats.rx_fifo_errors++;  in can_rx_offload_offload_one()
174 int can_rx_offload_irq_offload_timestamp(struct can_rx_offload *offload,  in can_rx_offload_irq_offload_timestamp()  argument
180 	for (i = offload->mb_first;  in can_rx_offload_irq_offload_timestamp()
181 	     can_rx_offload_le(offload, i, offload->mb_last);  in can_rx_offload_irq_offload_timestamp()
182 	     can_rx_offload_inc(offload, &i)) {  in can_rx_offload_irq_offload_timestamp()
188 		skb = can_rx_offload_offload_one(offload, i);  in can_rx_offload_irq_offload_timestamp()
192 		__skb_queue_add_sort(&offload->skb_irq_queue, skb,  in can_rx_offload_irq_offload_timestamp()
201 int can_rx_offload_irq_offload_fifo(struct can_rx_offload *offload)  in can_rx_offload_irq_offload_fifo()  argument
207 		skb = can_rx_offload_offload_one(offload, 0);  in can_rx_offload_irq_offload_fifo()
213 		__skb_queue_tail(&offload->skb_irq_queue, skb);  in can_rx_offload_irq_offload_fifo()
221 int can_rx_offload_queue_sorted(struct can_rx_offload *offload,  in can_rx_offload_queue_sorted()  argument
226 	if (skb_queue_len(&offload->skb_queue) >  in can_rx_offload_queue_sorted()
227 	    offload->skb_queue_len_max) {  in can_rx_offload_queue_sorted()
235 	__skb_queue_add_sort(&offload->skb_irq_queue, skb,  in can_rx_offload_queue_sorted()
242 unsigned int can_rx_offload_get_echo_skb(struct can_rx_offload *offload,  in can_rx_offload_get_echo_skb()  argument
246 	struct net_device *dev = offload->dev;  in can_rx_offload_get_echo_skb()
256 	err = can_rx_offload_queue_sorted(offload, skb, timestamp);  in can_rx_offload_get_echo_skb()
266 int can_rx_offload_queue_tail(struct can_rx_offload *offload,  in can_rx_offload_queue_tail()  argument
269 	if (skb_queue_len(&offload->skb_queue) >  in can_rx_offload_queue_tail()
270 	    offload->skb_queue_len_max) {  in can_rx_offload_queue_tail()
275 	__skb_queue_tail(&offload->skb_irq_queue, skb);  in can_rx_offload_queue_tail()
281 void can_rx_offload_irq_finish(struct can_rx_offload *offload)  in can_rx_offload_irq_finish()  argument
286 	if (skb_queue_empty_lockless(&offload->skb_irq_queue))  in can_rx_offload_irq_finish()
289 	spin_lock_irqsave(&offload->skb_queue.lock, flags);  in can_rx_offload_irq_finish()
290 	skb_queue_splice_tail_init(&offload->skb_irq_queue, &offload->skb_queue);  in can_rx_offload_irq_finish()
291 	spin_unlock_irqrestore(&offload->skb_queue.lock, flags);  in can_rx_offload_irq_finish()
293 	queue_len = skb_queue_len(&offload->skb_queue);  in can_rx_offload_irq_finish()
294 	if (queue_len > offload->skb_queue_len_max / 8)  in can_rx_offload_irq_finish()
295 		netdev_dbg(offload->dev, "%s: queue_len=%d\n",  in can_rx_offload_irq_finish()
298 	napi_schedule(&offload->napi);  in can_rx_offload_irq_finish()
302 void can_rx_offload_threaded_irq_finish(struct can_rx_offload *offload)  in can_rx_offload_threaded_irq_finish()  argument
307 	if (skb_queue_empty_lockless(&offload->skb_irq_queue))  in can_rx_offload_threaded_irq_finish()
310 	spin_lock_irqsave(&offload->skb_queue.lock, flags);  in can_rx_offload_threaded_irq_finish()
311 	skb_queue_splice_tail_init(&offload->skb_irq_queue, &offload->skb_queue);  in can_rx_offload_threaded_irq_finish()
312 	spin_unlock_irqrestore(&offload->skb_queue.lock, flags);  in can_rx_offload_threaded_irq_finish()
314 	queue_len = skb_queue_len(&offload->skb_queue);  in can_rx_offload_threaded_irq_finish()
315 	if (queue_len > offload->skb_queue_len_max / 8)  in can_rx_offload_threaded_irq_finish()
316 		netdev_dbg(offload->dev, "%s: queue_len=%d\n",  in can_rx_offload_threaded_irq_finish()
320 	napi_schedule(&offload->napi);  in can_rx_offload_threaded_irq_finish()
326 				     struct can_rx_offload *offload,  in can_rx_offload_init_queue()  argument
329 	offload->dev = dev;  in can_rx_offload_init_queue()
332 	offload->skb_queue_len_max = 2 << fls(weight);  in can_rx_offload_init_queue()
333 	offload->skb_queue_len_max *= 4;  in can_rx_offload_init_queue()
334 	skb_queue_head_init(&offload->skb_queue);  in can_rx_offload_init_queue()
335 	__skb_queue_head_init(&offload->skb_irq_queue);  in can_rx_offload_init_queue()
337 	netif_napi_add(dev, &offload->napi, can_rx_offload_napi_poll, weight);  in can_rx_offload_init_queue()
340 		__func__, offload->skb_queue_len_max);  in can_rx_offload_init_queue()
346 				 struct can_rx_offload *offload)  in can_rx_offload_add_timestamp()  argument
350 	if (offload->mb_first > BITS_PER_LONG_LONG ||  in can_rx_offload_add_timestamp()
351 	    offload->mb_last > BITS_PER_LONG_LONG || !offload->mailbox_read)  in can_rx_offload_add_timestamp()
354 	if (offload->mb_first < offload->mb_last) {  in can_rx_offload_add_timestamp()
355 		offload->inc = true;  in can_rx_offload_add_timestamp()
356 		weight = offload->mb_last - offload->mb_first;  in can_rx_offload_add_timestamp()
358 		offload->inc = false;  in can_rx_offload_add_timestamp()
359 		weight = offload->mb_first - offload->mb_last;  in can_rx_offload_add_timestamp()
362 	return can_rx_offload_init_queue(dev, offload, weight);  in can_rx_offload_add_timestamp()
367 			    struct can_rx_offload *offload, unsigned int weight)  in can_rx_offload_add_fifo()  argument
369 	if (!offload->mailbox_read)  in can_rx_offload_add_fifo()
372 	return can_rx_offload_init_queue(dev, offload, weight);  in can_rx_offload_add_fifo()
377 			      struct can_rx_offload *offload,  in can_rx_offload_add_manual()  argument
380 	if (offload->mailbox_read)  in can_rx_offload_add_manual()
383 	return can_rx_offload_init_queue(dev, offload, weight);  in can_rx_offload_add_manual()
387 void can_rx_offload_enable(struct can_rx_offload *offload)  in can_rx_offload_enable()  argument
389 	napi_enable(&offload->napi);  in can_rx_offload_enable()
393 void can_rx_offload_del(struct can_rx_offload *offload)  in can_rx_offload_del()  argument
395 	netif_napi_del(&offload->napi);  in can_rx_offload_del()
396 	skb_queue_purge(&offload->skb_queue);  in can_rx_offload_del()
397 	__skb_queue_purge(&offload->skb_irq_queue);  in can_rx_offload_del()