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()
69 		if (!skb_queue_empty(&offload->skb_queue))  in can_rx_offload_napi_poll()
70 			napi_reschedule(&offload->napi);  in can_rx_offload_napi_poll()
121  * @offload: pointer to rx_offload context
141 can_rx_offload_offload_one(struct can_rx_offload *offload, unsigned int n)  in can_rx_offload_offload_one()  argument
149 	if (unlikely(skb_queue_len(&offload->skb_queue) >  in can_rx_offload_offload_one()
150 		     offload->skb_queue_len_max))  in can_rx_offload_offload_one()
153 	skb = offload->mailbox_read(offload, n, &timestamp, drop);  in can_rx_offload_offload_one()
162 		offload->dev->stats.rx_dropped++;  in can_rx_offload_offload_one()
163 		offload->dev->stats.rx_fifo_errors++;  in can_rx_offload_offload_one()
175 int can_rx_offload_irq_offload_timestamp(struct can_rx_offload *offload,  in can_rx_offload_irq_offload_timestamp()  argument
181 	for (i = offload->mb_first;  in can_rx_offload_irq_offload_timestamp()
182 	     can_rx_offload_le(offload, i, offload->mb_last);  in can_rx_offload_irq_offload_timestamp()
183 	     can_rx_offload_inc(offload, &i)) {  in can_rx_offload_irq_offload_timestamp()
189 		skb = can_rx_offload_offload_one(offload, i);  in can_rx_offload_irq_offload_timestamp()
193 		__skb_queue_add_sort(&offload->skb_irq_queue, skb,  in can_rx_offload_irq_offload_timestamp()
202 int can_rx_offload_irq_offload_fifo(struct can_rx_offload *offload)  in can_rx_offload_irq_offload_fifo()  argument
208 		skb = can_rx_offload_offload_one(offload, 0);  in can_rx_offload_irq_offload_fifo()
214 		__skb_queue_tail(&offload->skb_irq_queue, skb);  in can_rx_offload_irq_offload_fifo()
222 int can_rx_offload_queue_timestamp(struct can_rx_offload *offload,  in can_rx_offload_queue_timestamp()  argument
227 	if (skb_queue_len(&offload->skb_queue) >  in can_rx_offload_queue_timestamp()
228 	    offload->skb_queue_len_max) {  in can_rx_offload_queue_timestamp()
236 	__skb_queue_add_sort(&offload->skb_irq_queue, skb,  in can_rx_offload_queue_timestamp()
243 unsigned int can_rx_offload_get_echo_skb(struct can_rx_offload *offload,  in can_rx_offload_get_echo_skb()  argument
247 	struct net_device *dev = offload->dev;  in can_rx_offload_get_echo_skb()
257 	err = can_rx_offload_queue_timestamp(offload, skb, timestamp);  in can_rx_offload_get_echo_skb()
267 int can_rx_offload_queue_tail(struct can_rx_offload *offload,  in can_rx_offload_queue_tail()  argument
270 	if (skb_queue_len(&offload->skb_queue) >  in can_rx_offload_queue_tail()
271 	    offload->skb_queue_len_max) {  in can_rx_offload_queue_tail()
276 	__skb_queue_tail(&offload->skb_irq_queue, skb);  in can_rx_offload_queue_tail()
282 void can_rx_offload_irq_finish(struct can_rx_offload *offload)  in can_rx_offload_irq_finish()  argument
287 	if (skb_queue_empty_lockless(&offload->skb_irq_queue))  in can_rx_offload_irq_finish()
290 	spin_lock_irqsave(&offload->skb_queue.lock, flags);  in can_rx_offload_irq_finish()
291 	skb_queue_splice_tail_init(&offload->skb_irq_queue, &offload->skb_queue);  in can_rx_offload_irq_finish()
292 	spin_unlock_irqrestore(&offload->skb_queue.lock, flags);  in can_rx_offload_irq_finish()
294 	queue_len = skb_queue_len(&offload->skb_queue);  in can_rx_offload_irq_finish()
295 	if (queue_len > offload->skb_queue_len_max / 8)  in can_rx_offload_irq_finish()
296 		netdev_dbg(offload->dev, "%s: queue_len=%d\n",  in can_rx_offload_irq_finish()
299 	napi_schedule(&offload->napi);  in can_rx_offload_irq_finish()
303 void can_rx_offload_threaded_irq_finish(struct can_rx_offload *offload)  in can_rx_offload_threaded_irq_finish()  argument
308 	if (skb_queue_empty_lockless(&offload->skb_irq_queue))  in can_rx_offload_threaded_irq_finish()
311 	spin_lock_irqsave(&offload->skb_queue.lock, flags);  in can_rx_offload_threaded_irq_finish()
312 	skb_queue_splice_tail_init(&offload->skb_irq_queue, &offload->skb_queue);  in can_rx_offload_threaded_irq_finish()
313 	spin_unlock_irqrestore(&offload->skb_queue.lock, flags);  in can_rx_offload_threaded_irq_finish()
315 	queue_len = skb_queue_len(&offload->skb_queue);  in can_rx_offload_threaded_irq_finish()
316 	if (queue_len > offload->skb_queue_len_max / 8)  in can_rx_offload_threaded_irq_finish()
317 		netdev_dbg(offload->dev, "%s: queue_len=%d\n",  in can_rx_offload_threaded_irq_finish()
321 	napi_schedule(&offload->napi);  in can_rx_offload_threaded_irq_finish()
327 				     struct can_rx_offload *offload,  in can_rx_offload_init_queue()  argument
330 	offload->dev = dev;  in can_rx_offload_init_queue()
333 	offload->skb_queue_len_max = 2 << fls(weight);  in can_rx_offload_init_queue()
334 	offload->skb_queue_len_max *= 4;  in can_rx_offload_init_queue()
335 	skb_queue_head_init(&offload->skb_queue);  in can_rx_offload_init_queue()
336 	__skb_queue_head_init(&offload->skb_irq_queue);  in can_rx_offload_init_queue()
338 	netif_napi_add_weight(dev, &offload->napi, can_rx_offload_napi_poll,  in can_rx_offload_init_queue()
342 		__func__, offload->skb_queue_len_max);  in can_rx_offload_init_queue()
348 				 struct can_rx_offload *offload)  in can_rx_offload_add_timestamp()  argument
352 	if (offload->mb_first > BITS_PER_LONG_LONG ||  in can_rx_offload_add_timestamp()
353 	    offload->mb_last > BITS_PER_LONG_LONG || !offload->mailbox_read)  in can_rx_offload_add_timestamp()
356 	if (offload->mb_first < offload->mb_last) {  in can_rx_offload_add_timestamp()
357 		offload->inc = true;  in can_rx_offload_add_timestamp()
358 		weight = offload->mb_last - offload->mb_first;  in can_rx_offload_add_timestamp()
360 		offload->inc = false;  in can_rx_offload_add_timestamp()
361 		weight = offload->mb_first - offload->mb_last;  in can_rx_offload_add_timestamp()
364 	return can_rx_offload_init_queue(dev, offload, weight);  in can_rx_offload_add_timestamp()
369 			    struct can_rx_offload *offload, unsigned int weight)  in can_rx_offload_add_fifo()  argument
371 	if (!offload->mailbox_read)  in can_rx_offload_add_fifo()
374 	return can_rx_offload_init_queue(dev, offload, weight);  in can_rx_offload_add_fifo()
379 			      struct can_rx_offload *offload,  in can_rx_offload_add_manual()  argument
382 	if (offload->mailbox_read)  in can_rx_offload_add_manual()
385 	return can_rx_offload_init_queue(dev, offload, weight);  in can_rx_offload_add_manual()
389 void can_rx_offload_enable(struct can_rx_offload *offload)  in can_rx_offload_enable()  argument
391 	napi_enable(&offload->napi);  in can_rx_offload_enable()
395 void can_rx_offload_del(struct can_rx_offload *offload)  in can_rx_offload_del()  argument
397 	netif_napi_del(&offload->napi);  in can_rx_offload_del()
398 	skb_queue_purge(&offload->skb_queue);  in can_rx_offload_del()
399 	__skb_queue_purge(&offload->skb_irq_queue);  in can_rx_offload_del()