X-Git-Url: http://git.droids-corp.org/?a=blobdiff_plain;f=lib%2Flibrte_eal%2Flinux%2Feal%2Feal_interrupts.c;h=be0dd4490b65bf3545c40b90d4fa25f001fb74be;hb=6e48cf0369c1906109918b3b7975b23648cf5ad4;hp=cbac451e113c4ada97a6e01743f6851272b3963c;hpb=91d7846ce68d7c637cd7efde751f5276475aa9c8;p=dpdk.git

diff --git a/lib/librte_eal/linux/eal/eal_interrupts.c b/lib/librte_eal/linux/eal/eal_interrupts.c
index cbac451e11..be0dd4490b 100644
--- a/lib/librte_eal/linux/eal/eal_interrupts.c
+++ b/lib/librte_eal/linux/eal/eal_interrupts.c
@@ -76,6 +76,8 @@ struct rte_intr_callback {
 	TAILQ_ENTRY(rte_intr_callback) next;
 	rte_intr_callback_fn cb_fn;  /**< callback address */
 	void *cb_arg;                /**< parameter for callback */
+	uint8_t pending_delete;      /**< delete after callback is called */
+	rte_intr_unregister_callback_fn ucb_fn; /**< fn to call before cb is deleted */
 };
 
 struct rte_intr_source {
@@ -472,6 +474,8 @@ rte_intr_callback_register(const struct rte_intr_handle *intr_handle,
 	}
 	callback->cb_fn = cb;
 	callback->cb_arg = cb_arg;
+	callback->pending_delete = 0;
+	callback->ucb_fn = NULL;
 
 	rte_spinlock_lock(&intr_lock);
 
@@ -518,6 +522,57 @@ rte_intr_callback_register(const struct rte_intr_handle *intr_handle,
 	return ret;
 }
 
+int __rte_experimental
+rte_intr_callback_unregister_pending(const struct rte_intr_handle *intr_handle,
+				rte_intr_callback_fn cb_fn, void *cb_arg,
+				rte_intr_unregister_callback_fn ucb_fn)
+{
+	int ret;
+	struct rte_intr_source *src;
+	struct rte_intr_callback *cb, *next;
+
+	/* do parameter checking first */
+	if (intr_handle == NULL || intr_handle->fd < 0) {
+		RTE_LOG(ERR, EAL,
+		"Unregistering with invalid input parameter\n");
+		return -EINVAL;
+	}
+
+	rte_spinlock_lock(&intr_lock);
+
+	/* check if the insterrupt source for the fd is existent */
+	TAILQ_FOREACH(src, &intr_sources, next)
+		if (src->intr_handle.fd == intr_handle->fd)
+			break;
+
+	/* No interrupt source registered for the fd */
+	if (src == NULL) {
+		ret = -ENOENT;
+
+	/* only usable if the source is active */
+	} else if (src->active == 0) {
+		ret = -EAGAIN;
+
+	} else {
+		ret = 0;
+
+		/* walk through the callbacks and mark all that match. */
+		for (cb = TAILQ_FIRST(&src->callbacks); cb != NULL; cb = next) {
+			next = TAILQ_NEXT(cb, next);
+			if (cb->cb_fn == cb_fn && (cb_arg == (void *)-1 ||
+					cb->cb_arg == cb_arg)) {
+				cb->pending_delete = 1;
+				cb->ucb_fn = ucb_fn;
+				ret++;
+			}
+		}
+	}
+
+	rte_spinlock_unlock(&intr_lock);
+
+	return ret;
+}
+
 int
 rte_intr_callback_unregister(const struct rte_intr_handle *intr_handle,
 			rte_intr_callback_fn cb_fn, void *cb_arg)
@@ -698,7 +753,7 @@ static int
 eal_intr_process_interrupts(struct epoll_event *events, int nfds)
 {
 	bool call = false;
-	int n, bytes_read;
+	int n, bytes_read, rv;
 	struct rte_intr_source *src;
 	struct rte_intr_callback *cb, *next;
 	union rte_intr_read_buffer buf;
@@ -823,9 +878,35 @@ eal_intr_process_interrupts(struct epoll_event *events, int nfds)
 				rte_spinlock_lock(&intr_lock);
 			}
 		}
-
 		/* we done with that interrupt source, release it. */
 		src->active = 0;
+
+		rv = 0;
+
+		/* check if any callback are supposed to be removed */
+		for (cb = TAILQ_FIRST(&src->callbacks); cb != NULL; cb = next) {
+			next = TAILQ_NEXT(cb, next);
+			if (cb->pending_delete) {
+				TAILQ_REMOVE(&src->callbacks, cb, next);
+				if (cb->ucb_fn)
+					cb->ucb_fn(&src->intr_handle, cb->cb_arg);
+				free(cb);
+				rv++;
+			}
+		}
+
+		/* all callbacks for that source are removed. */
+		if (TAILQ_EMPTY(&src->callbacks)) {
+			TAILQ_REMOVE(&intr_sources, src, next);
+			free(src);
+		}
+
+		/* notify the pipe fd waited by epoll_wait to rebuild the wait list */
+		if (rv >= 0 && write(intr_pipe.writefd, "1", 1) < 0) {
+			rte_spinlock_unlock(&intr_lock);
+			return -EPIPE;
+		}
+
 		rte_spinlock_unlock(&intr_lock);
 	}