hw/hfi1/iowait.h

11 #include <linux/wait.h>
57  * @list: used to add/insert into QP/PQ wait lists
63  * @lock: lock protected head of wait queue
65  * @wait_dma: wait for sdma_busy == 0
66  * @wait_pio: wait for pio_busy == 0
71  * @flags: wait flags (one per QP)
72  * @wait: SE array for multiple legs
102 		struct iowait_work *wait,
107 	void (*wakeup)(struct iowait *wait, int reason);
108 	void (*sdma_drained)(struct iowait *wait);
109 	void (*init_priority)(struct iowait *wait);
121 	struct iowait_work wait[IOWAIT_SES];
126 void iowait_set_flag(struct iowait *wait, u32 flag);
127 bool iowait_flag_set(struct iowait *wait, u32 flag);
128 void iowait_clear_flag(struct iowait *wait, u32 flag);
130 void iowait_init(struct iowait *wait, u32 tx_limit,
134 			      struct iowait_work *wait,
138 		 void (*wakeup)(struct iowait *wait, int reason),
139 		 void (*sdma_drained)(struct iowait *wait),
140 		 void (*init_priority)(struct iowait *wait));
144  * @wait: wait struct to schedule
148 static inline bool iowait_schedule(struct iowait *wait,
151 	return !!queue_work_on(cpu, wq, &wait->wait[IOWAIT_IB_SE].iowork);
156  * @wait: the iowait structure
160 static inline bool iowait_tid_schedule(struct iowait *wait,
163 	return !!queue_work_on(cpu, wq, &wait->wait[IOWAIT_TID_SE].iowork);
167  * iowait_sdma_drain() - wait for DMAs to drain
169  * @wait: iowait structure
174 static inline void iowait_sdma_drain(struct iowait *wait)
176 	wait_event(wait->wait_dma, !atomic_read(&wait->sdma_busy));
182  * @wait: iowait structure
185 static inline int iowait_sdma_pending(struct iowait *wait)
187 	return atomic_read(&wait->sdma_busy);
192  * @wait: iowait structure
194 static inline void iowait_sdma_inc(struct iowait *wait)
196 	atomic_inc(&wait->sdma_busy);
201  * @wait: iowait structure
203 static inline void iowait_sdma_add(struct iowait *wait, int count)
205 	atomic_add(count, &wait->sdma_busy);
210  * @wait: iowait structure
212 static inline int iowait_sdma_dec(struct iowait *wait)
214 	if (!wait)
216 	return atomic_dec_and_test(&wait->sdma_busy);
220  * iowait_pio_drain() - wait for pios to drain
222  * @wait: iowait structure
227 static inline void iowait_pio_drain(struct iowait *wait)
229 	wait_event_timeout(wait->wait_pio,
230 			   !atomic_read(&wait->pio_busy),
237  * @wait: iowait structure
240 static inline int iowait_pio_pending(struct iowait *wait)
242 	return atomic_read(&wait->pio_busy);
247  * @wait: iowait structure
249 static inline void iowait_pio_inc(struct iowait *wait)
251 	atomic_inc(&wait->pio_busy);
256  * @wait: iowait structure
258 static inline int iowait_pio_dec(struct iowait *wait)
260 	if (!wait)
262 	return atomic_dec_and_test(&wait->pio_busy);
268  * @wait: iowait structure
272 static inline void iowait_drain_wakeup(struct iowait *wait)
274 	wake_up(&wait->wait_dma);
275 	wake_up(&wait->wait_pio);
276 	if (wait->sdma_drained)
277 		wait->sdma_drained(wait);
283  * @wait: iowait_work structure
285 static inline struct sdma_txreq *iowait_get_txhead(struct iowait_work *wait)
289 	if (!list_empty(&wait->tx_head)) {
291 			&wait->tx_head,
318 	num_desc = iowait_get_desc(&w->wait[IOWAIT_IB_SE]);
319 	num_desc += iowait_get_desc(&w->wait[IOWAIT_TID_SE]);
337 	iowait_update_priority(&w->wait[IOWAIT_IB_SE]);
338 	iowait_update_priority(&w->wait[IOWAIT_TID_SE]);
355  * iowait_queue - Put the iowait on a wait queue
358  * @wait_head: the wait queue
361  * wait queue after a resource (eg, sdma descriptor or pio
368 	 * To play fair, insert the iowait at the tail of the wait queue if it
385  * iowait_starve_clear - clear the wait queue's starve count
405  * @wait: the iowait_work structure
407 static inline bool iowait_packet_queued(struct iowait_work *wait)
409 	return !list_empty(&wait->tx_head);
413  * inc_wait_count - increment wait counts
431 	return &w->wait[IOWAIT_TID_SE];
440 	return &w->wait[IOWAIT_IB_SE];