Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753424AbdCNRbN (ORCPT ); Tue, 14 Mar 2017 13:31:13 -0400 Received: from userp1040.oracle.com ([156.151.31.81]:18373 "EHLO userp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753222AbdCNRaD (ORCPT ); Tue, 14 Mar 2017 13:30:03 -0400 From: Shannon Nelson To: netdev@vger.kernel.org, davem@davemloft.net Cc: sparclinux@vger.kernel.org, linux-kernel@vger.kernel.org, Shannon Nelson Subject: [PATCH v2 net-next 3/5] sunvnet: track port queues correctly Date: Tue, 14 Mar 2017 10:24:41 -0700 Message-Id: <1489512283-422140-4-git-send-email-shannon.nelson@oracle.com> X-Mailer: git-send-email 1.7.1 In-Reply-To: <1489512283-422140-1-git-send-email-shannon.nelson@oracle.com> References: <1489512283-422140-1-git-send-email-shannon.nelson@oracle.com> X-Source-IP: aserv0021.oracle.com [141.146.126.233] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2435 Lines: 85 Track our used and unused queue indexies correctly. Otherwise, as ports dropped out and returned, they all eventually ended up with the same queue index. Orabug: 25190537 Signed-off-by: Shannon Nelson --- drivers/net/ethernet/sun/sunvnet_common.c | 24 ++++++++++++++++++++---- drivers/net/ethernet/sun/sunvnet_common.h | 11 ++--------- 2 files changed, 22 insertions(+), 13 deletions(-) diff --git a/drivers/net/ethernet/sun/sunvnet_common.c b/drivers/net/ethernet/sun/sunvnet_common.c index d3dc8ed..5e1d016 100644 --- a/drivers/net/ethernet/sun/sunvnet_common.c +++ b/drivers/net/ethernet/sun/sunvnet_common.c @@ -1728,11 +1728,25 @@ void sunvnet_poll_controller_common(struct net_device *dev, struct vnet *vp) void sunvnet_port_add_txq_common(struct vnet_port *port) { struct vnet *vp = port->vp; - int n; + int smallest = 0; + int i; + + /* find the first least-used q + * When there are more ldoms than q's, we start to + * double up on ports per queue. + */ + for (i = 0; i < VNET_MAX_TXQS; i++) { + if (vp->q_used[i] == 0) { + smallest = i; + break; + } + if (vp->q_used[i] < vp->q_used[smallest]) + smallest = i; + } - n = vp->nports++; - n = n & (VNET_MAX_TXQS - 1); - port->q_index = n; + vp->nports++; + vp->q_used[smallest]++; + port->q_index = smallest; netif_tx_wake_queue(netdev_get_tx_queue(VNET_PORT_TO_NET_DEVICE(port), port->q_index)); } @@ -1743,5 +1757,7 @@ void sunvnet_port_rm_txq_common(struct vnet_port *port) port->vp->nports--; netif_tx_stop_queue(netdev_get_tx_queue(VNET_PORT_TO_NET_DEVICE(port), port->q_index)); + port->vp->q_used[port->q_index]--; + port->q_index = 0; } EXPORT_SYMBOL_GPL(sunvnet_port_rm_txq_common); diff --git a/drivers/net/ethernet/sun/sunvnet_common.h b/drivers/net/ethernet/sun/sunvnet_common.h index c0fac03..b20d6fa 100644 --- a/drivers/net/ethernet/sun/sunvnet_common.h +++ b/drivers/net/ethernet/sun/sunvnet_common.h @@ -112,22 +112,15 @@ struct vnet_mcast_entry { }; struct vnet { - /* Protects port_list and port_hash. */ - spinlock_t lock; - + spinlock_t lock; /* Protects port_list and port_hash. */ struct net_device *dev; - u32 msg_enable; - + u8 q_used[VNET_MAX_TXQS]; struct list_head port_list; - struct hlist_head port_hash[VNET_PORT_HASH_SIZE]; - struct vnet_mcast_entry *mcast_list; - struct list_head list; u64 local_mac; - int nports; }; -- 1.7.1