From 53d66f042c713041ed03a31cdda82f871974b332 Mon Sep 17 00:00:00 2001
From: Andre Detsch <adetsch@br.ibm.com>
Date: Tue, 17 Aug 2010 05:49:12 +0000
Subject: [PATCH] --- yaml --- r: 209848 b: refs/heads/master c:
 2928db4c3c62552d3caf9ab53ccc6f7ae9865a23 h: refs/heads/master v: v3

---
 [refs]                             |  2 +-
 trunk/drivers/net/ehea/ehea.h      |  3 +-
 trunk/drivers/net/ehea/ehea_main.c | 60 +++++++++++++++++++++++++++++-
 3 files changed, 62 insertions(+), 3 deletions(-)

diff --git a/[refs] b/[refs]
index cc4a98f63351..14611b99bd94 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 96ac4f6b326450af496e82347e207b0fca7a9090
+refs/heads/master: 2928db4c3c62552d3caf9ab53ccc6f7ae9865a23
diff --git a/trunk/drivers/net/ehea/ehea.h b/trunk/drivers/net/ehea/ehea.h
index 0060e422f171..2ce67f6152cd 100644
--- a/trunk/drivers/net/ehea/ehea.h
+++ b/trunk/drivers/net/ehea/ehea.h
@@ -40,7 +40,7 @@
 #include <asm/io.h>
 
 #define DRV_NAME	"ehea"
-#define DRV_VERSION	"EHEA_0105"
+#define DRV_VERSION	"EHEA_0106"
 
 /* eHEA capability flags */
 #define DLPAR_PORT_ADD_REM 1
@@ -400,6 +400,7 @@ struct ehea_port_res {
 	u32 poll_counter;
 	struct net_lro_mgr lro_mgr;
 	struct net_lro_desc lro_desc[MAX_LRO_DESCRIPTORS];
+	int sq_restart_flag;
 };
 
 
diff --git a/trunk/drivers/net/ehea/ehea_main.c b/trunk/drivers/net/ehea/ehea_main.c
index 3beba70b7dea..adb5994c125f 100644
--- a/trunk/drivers/net/ehea/ehea_main.c
+++ b/trunk/drivers/net/ehea/ehea_main.c
@@ -776,6 +776,53 @@ static int ehea_proc_rwqes(struct net_device *dev,
 	return processed;
 }
 
+#define SWQE_RESTART_CHECK 0xdeadbeaff00d0000ull
+
+static void reset_sq_restart_flag(struct ehea_port *port)
+{
+	int i;
+
+	for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
+		struct ehea_port_res *pr = &port->port_res[i];
+		pr->sq_restart_flag = 0;
+	}
+}
+
+static void check_sqs(struct ehea_port *port)
+{
+	struct ehea_swqe *swqe;
+	int swqe_index;
+	int i, k;
+
+	for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
+		struct ehea_port_res *pr = &port->port_res[i];
+		k = 0;
+		swqe = ehea_get_swqe(pr->qp, &swqe_index);
+		memset(swqe, 0, SWQE_HEADER_SIZE);
+		atomic_dec(&pr->swqe_avail);
+
+		swqe->tx_control |= EHEA_SWQE_PURGE;
+		swqe->wr_id = SWQE_RESTART_CHECK;
+		swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
+		swqe->tx_control |= EHEA_SWQE_IMM_DATA_PRESENT;
+		swqe->immediate_data_length = 80;
+
+		ehea_post_swqe(pr->qp, swqe);
+
+		while (pr->sq_restart_flag == 0) {
+			msleep(5);
+			if (++k == 100) {
+				ehea_error("HW/SW queues out of sync");
+				ehea_schedule_port_reset(pr->port);
+				return;
+			}
+		}
+	}
+
+	return;
+}
+
+
 static struct ehea_cqe *ehea_proc_cqes(struct ehea_port_res *pr, int my_quota)
 {
 	struct sk_buff *skb;
@@ -793,6 +840,13 @@ static struct ehea_cqe *ehea_proc_cqes(struct ehea_port_res *pr, int my_quota)
 
 		cqe_counter++;
 		rmb();
+
+		if (cqe->wr_id == SWQE_RESTART_CHECK) {
+			pr->sq_restart_flag = 1;
+			swqe_av++;
+			break;
+		}
+
 		if (cqe->status & EHEA_CQE_STAT_ERR_MASK) {
 			ehea_error("Bad send completion status=0x%04X",
 				   cqe->status);
@@ -2675,8 +2729,10 @@ static void ehea_flush_sq(struct ehea_port *port)
 		int k = 0;
 		while (atomic_read(&pr->swqe_avail) < swqe_max) {
 			msleep(5);
-			if (++k == 20)
+			if (++k == 20) {
+				ehea_error("WARNING: sq not flushed completely");
 				break;
+			}
 		}
 	}
 }
@@ -2917,6 +2973,7 @@ static void ehea_rereg_mrs(struct work_struct *work)
 					port_napi_disable(port);
 					mutex_unlock(&port->port_lock);
 				}
+				reset_sq_restart_flag(port);
 			}
 
 			/* Unregister old memory region */
@@ -2951,6 +3008,7 @@ static void ehea_rereg_mrs(struct work_struct *work)
 						mutex_lock(&port->port_lock);
 						port_napi_enable(port);
 						ret = ehea_restart_qps(dev);
+						check_sqs(port);
 						if (!ret)
 							netif_wake_queue(dev);
 						mutex_unlock(&port->port_lock);