Initial working version of RSS

The patch enables RSS support for TLDK udpfwd application.
The number of rx queues and tx queues are equal to the number of lcore
enabled for backend operation. NICs calculate the RSS hash based on the
UDP dest port only. The RSS hash key is calculated at runtime based on
the number of queues enebaled.

Change-Id: I06006a4606f8faad8f16241348b2ce19b70335e5
Signed-off-by: Mohammad Abdul Awal <mohammad.abdul.awal@intel.com>

2 files changed, 30 insertions, 7 deletions

diff --git a/lib/libtle_udp/tle_udp_impl.h b/lib/libtle_udp/tle_udp_impl.h
index 8e61ea6..b46e4dd 100644
--- a/lib/libtle_udp/tle_udp_impl.h
+++ b/lib/libtle_udp/tle_udp_impl.h
@@ -63,6 +63,8 @@ struct tle_udp_dev_param {
 	uint32_t tx_offload; /**< DEV_TX_OFFLOAD_* supported. */
 	struct in_addr local_addr4;  /**< local IPv4 address assigned. */
 	struct in6_addr local_addr6; /**< local IPv6 address assigned. */
+	uint32_t nb_bl_ports; /**< number of blocked ports. */
+	uint16_t *bl_ports; /**< list of blocked ports. */
 };
 
 #define TLE_UDP_MAX_HDR	0x60
diff --git a/lib/libtle_udp/udp_ctl.c b/lib/libtle_udp/udp_ctl.c
index 55c4afd..3ff9751 100644
--- a/lib/libtle_udp/udp_ctl.c
+++ b/lib/libtle_udp/udp_ctl.c
@@ -47,6 +47,11 @@ check_dev_prm(const struct tle_udp_dev_param *dev_prm)
 			sizeof(tle_udp6_any)) == 0)
 		return -EINVAL;
 
+	/* all the ports are blocked. */
+	if (dev_prm->nb_bl_ports > UINT16_MAX ||
+		(dev_prm->nb_bl_ports != 0 && dev_prm->bl_ports == NULL))
+		return -EINVAL;
+
 	return 0;
 }
 
@@ -241,9 +246,11 @@ tle_udp_ctx_invalidate(struct tle_udp_ctx *ctx)
 }
 
 static int
-init_dev_proto(struct tle_udp_dev *dev, uint32_t idx, int32_t socket_id)
+init_dev_proto(struct tle_udp_dev *dev, uint32_t idx, int32_t socket_id,
+		uint16_t *bl_ports, uint32_t nb_bl_ports)
 {
 	size_t sz;
+	uint32_t i;
 
 	sz = sizeof(*dev->dp[idx]);
 	dev->dp[idx] = rte_zmalloc_socket(NULL, sz, RTE_CACHE_LINE_SIZE,
@@ -257,6 +264,11 @@ init_dev_proto(struct tle_udp_dev *dev, uint32_t idx, int32_t socket_id)
 	}
 
 	udp_pbm_init(&dev->dp[idx]->use, LPORT_START_BLK);
+
+	if (bl_ports != NULL)
+		for (i = 0; i < nb_bl_ports; i++)
+			udp_pbm_set(&dev->dp[idx]->use, bl_ports[i]);
+
 	return 0;
 }
 
@@ -281,6 +293,7 @@ tle_udp_add_dev(struct tle_udp_ctx *ctx,
 	const struct tle_udp_dev_param *dev_prm)
 {
 	int32_t rc;
+	uint32_t i;
 	struct tle_udp_dev *dev;
 
 	if (ctx == NULL || dev_prm == NULL || check_dev_prm(dev_prm) != 0) {
@@ -294,13 +307,23 @@ tle_udp_add_dev(struct tle_udp_ctx *ctx,
 	rc = 0;
 
 	/* device can handle IPv4 traffic */
-	if (dev_prm->local_addr4.s_addr != INADDR_ANY)
-		rc = init_dev_proto(dev, TLE_UDP_V4, ctx->prm.socket_id);
+	if (dev_prm->local_addr4.s_addr != INADDR_ANY) {
+		rc = init_dev_proto(dev, TLE_UDP_V4, ctx->prm.socket_id,
+				dev_prm->bl_ports, dev_prm->nb_bl_ports);
+		for (i = 0; i < dev_prm->nb_bl_ports; i++)
+			udp_pbm_set(&ctx->use[TLE_UDP_V4],
+				dev_prm->bl_ports[i]);
+	}
 
 	/* device can handle IPv6 traffic */
 	if (rc == 0 && memcmp(&dev_prm->local_addr6, &tle_udp6_any,
-			sizeof(tle_udp6_any)) != 0)
-		rc = init_dev_proto(dev, TLE_UDP_V6, ctx->prm.socket_id);
+			sizeof(tle_udp6_any)) != 0) {
+		rc = init_dev_proto(dev, TLE_UDP_V6, ctx->prm.socket_id,
+				dev_prm->bl_ports, dev_prm->nb_bl_ports);
+		for (i = 0; i < dev_prm->nb_bl_ports; i++)
+			udp_pbm_set(&ctx->use[TLE_UDP_V6],
+				dev_prm->bl_ports[i]);
+	}
 
 	if (rc != 0) {
 		/* cleanup and return an error. */
@@ -483,13 +506,11 @@ stream_fill_dev(struct tle_udp_ctx *ctx, struct tle_udp_stream *s)
 		return ENFILE;
 
 	/* fill socket's dst port and type */
-
 	sp = htons(p);
 	s->type = t;
 	s->port.dst = sp;
 
 	/* mark port as in-use */
-
 	udp_pbm_set(&ctx->use[t], p);
 	if (dev != NULL) {
 		udp_pbm_set(pbm, p);