X-Git-Url: http://git.droids-corp.org/?a=blobdiff_plain;f=lib%2Flibrte_eal%2Flinuxapp%2Feal%2Feal_interrupts.c;h=4b5e6da31e2a474f214e6fa36db5c023fe935dc8;hb=HEAD;hp=e293728ffa8bc95fe3c55fc4d9a127fc311c8a3c;hpb=99998feec90535c1abff6e233b3d4cb1d5ca80b2;p=dpdk.git

diff --git a/lib/librte_eal/linuxapp/eal/eal_interrupts.c b/lib/librte_eal/linuxapp/eal/eal_interrupts.c
index e293728ffa..4b5e6da31e 100644
--- a/lib/librte_eal/linuxapp/eal/eal_interrupts.c
+++ b/lib/librte_eal/linuxapp/eal/eal_interrupts.c
@@ -51,7 +51,6 @@
 #include <rte_common.h>
 #include <rte_interrupts.h>
 #include <rte_memory.h>
-#include <rte_memzone.h>
 #include <rte_launch.h>
 #include <rte_eal.h>
 #include <rte_per_lcore.h>
@@ -60,10 +59,10 @@
 #include <rte_branch_prediction.h>
 #include <rte_debug.h>
 #include <rte_log.h>
-#include <rte_pci.h>
 #include <rte_malloc.h>
 #include <rte_errno.h>
 #include <rte_spinlock.h>
+#include <rte_pause.h>
 
 #include "eal_private.h"
 #include "eal_vfio.h"
@@ -279,29 +278,6 @@ vfio_disable_msi(const struct rte_intr_handle *intr_handle) {
 	return ret;
 }
 
-static int
-get_max_intr(const struct rte_intr_handle *intr_handle)
-{
-	struct rte_intr_source *src;
-
-	TAILQ_FOREACH(src, &intr_sources, next) {
-		if (src->intr_handle.fd != intr_handle->fd)
-			continue;
-
-		if (src->intr_handle.max_intr < intr_handle->max_intr)
-			src->intr_handle.max_intr = intr_handle->max_intr;
-		if (!src->intr_handle.max_intr)
-			src->intr_handle.max_intr = 1;
-		else if (src->intr_handle.max_intr > RTE_MAX_RXTX_INTR_VEC_ID)
-			src->intr_handle.max_intr
-				= RTE_MAX_RXTX_INTR_VEC_ID + 1;
-
-		return src->intr_handle.max_intr;
-	}
-
-	return -1;
-}
-
 /* enable MSI-X interrupts */
 static int
 vfio_enable_msix(const struct rte_intr_handle *intr_handle) {
@@ -314,15 +290,10 @@ vfio_enable_msix(const struct rte_intr_handle *intr_handle) {
 
 	irq_set = (struct vfio_irq_set *) irq_set_buf;
 	irq_set->argsz = len;
-
-	ret = get_max_intr(intr_handle);
-	if (ret < 0) {
-		RTE_LOG(ERR, EAL, "Invalid number of MSI-X irqs for fd %d\n",
-			intr_handle->fd);
-		return -1;
-	}
-
-	irq_set->count = ret;
+	/* 0 < irq_set->count < RTE_MAX_RXTX_INTR_VEC_ID + 1 */
+	irq_set->count = intr_handle->max_intr ?
+		(intr_handle->max_intr > RTE_MAX_RXTX_INTR_VEC_ID + 1 ?
+		RTE_MAX_RXTX_INTR_VEC_ID + 1 : intr_handle->max_intr) : 1;
 	irq_set->flags = VFIO_IRQ_SET_DATA_EVENTFD | VFIO_IRQ_SET_ACTION_TRIGGER;
 	irq_set->index = VFIO_PCI_MSIX_IRQ_INDEX;
 	irq_set->start = 0;
@@ -772,8 +743,7 @@ eal_intr_process_interrupts(struct epoll_event *events, int nfds)
 				rte_spinlock_unlock(&intr_lock);
 
 				/* call the actual callback */
-				active_cb.cb_fn(&src->intr_handle,
-					active_cb.cb_arg);
+				active_cb.cb_fn(active_cb.cb_arg);
 
 				/*get the lock back. */
 				rte_spinlock_lock(&intr_lock);
@@ -903,7 +873,7 @@ eal_intr_thread_main(__rte_unused void *arg)
 int
 rte_eal_intr_init(void)
 {
-	int ret = 0, ret_1 = 0;
+	int ret = 0;
 	char thread_name[RTE_MAX_THREAD_NAME_LEN];
 
 	/* init the global interrupt source head */
@@ -919,30 +889,23 @@ rte_eal_intr_init(void)
 	}
 
 	/* create the host thread to wait/handle the interrupt */
-	ret = pthread_create(&intr_thread, NULL,
+	snprintf(thread_name, sizeof(thread_name), "eal-intr-thread");
+	ret = rte_ctrl_thread_create(&intr_thread, thread_name, NULL,
 			eal_intr_thread_main, NULL);
 	if (ret != 0) {
-		rte_errno = ret;
+		rte_errno = -ret;
 		RTE_LOG(ERR, EAL,
 			"Failed to create thread for interrupt handling\n");
-	} else {
-		/* Set thread_name for aid in debugging. */
-		snprintf(thread_name, RTE_MAX_THREAD_NAME_LEN,
-			"eal-intr-thread");
-		ret_1 = rte_thread_setname(intr_thread, thread_name);
-		if (ret_1 != 0)
-			RTE_LOG(DEBUG, EAL,
-			"Failed to set thread name for interrupt handling\n");
 	}
 
-	return -ret;
+	return ret;
 }
 
 static void
 eal_intr_proc_rxtx_intr(int fd, const struct rte_intr_handle *intr_handle)
 {
 	union rte_intr_read_buffer buf;
-	int bytes_read = 1;
+	int bytes_read = 0;
 	int nbytes;
 
 	switch (intr_handle->type) {
@@ -958,11 +921,9 @@ eal_intr_proc_rxtx_intr(int fd, const struct rte_intr_handle *intr_handle)
 		break;
 #endif
 	case RTE_INTR_HANDLE_VDEV:
-		/* for vdev, fd points to:
-		 * a. eventfd which does not need to read out;
-		 * b. datapath fd which needs PMD to read out.
-		 */
-		return;
+		bytes_read = intr_handle->efd_counter_size;
+		/* For vdev, number of bytes to read is set by driver */
+		break;
 	case RTE_INTR_HANDLE_EXT:
 		return;
 	default:
@@ -975,6 +936,8 @@ eal_intr_proc_rxtx_intr(int fd, const struct rte_intr_handle *intr_handle)
 	 * read out to clear the ready-to-be-read flag
 	 * for epoll_wait.
 	 */
+	if (bytes_read == 0)
+		return;
 	do {
 		nbytes = read(fd, &buf, bytes_read);
 		if (nbytes < 0) {
@@ -1234,7 +1197,12 @@ rte_intr_efd_enable(struct rte_intr_handle *intr_handle, uint32_t nb_efd)
 		intr_handle->nb_efd   = n;
 		intr_handle->max_intr = NB_OTHER_INTR + n;
 	} else if (intr_handle->type == RTE_INTR_HANDLE_VDEV) {
-		/* do nothing, and let vdev driver to initialize this struct */
+		/* only check, initialization would be done in vdev driver.*/
+		if (intr_handle->efd_counter_size >
+		    sizeof(union rte_intr_read_buffer)) {
+			RTE_LOG(ERR, EAL, "the efd_counter_size is oversized");
+			return -EINVAL;
+		}
 	} else {
 		intr_handle->efds[0]  = intr_handle->fd;
 		intr_handle->nb_efd   = RTE_MIN(nb_efd, 1U);