From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Michael Chan" Subject: [PATCH net-next 1/6] [BNX2]: Allow phy reset to be skipped during chip reset. Date: Fri, 16 May 2008 14:29:36 -0700 Message-ID: <1210973376.5507.17.camel@dell> Mime-Version: 1.0 Content-Type: text/plain Content-Transfer-Encoding: 7bit Cc: netdev@vger.kernel.org, andy@greyhouse.net, benli@broadcom.com To: davem@davemloft.net Return-path: Received: from mms2.broadcom.com ([216.31.210.18]:4156 "EHLO mms2.broadcom.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754390AbYEPUiG (ORCPT ); Fri, 16 May 2008 16:38:06 -0400 Sender: netdev-owner@vger.kernel.org List-ID: [BNX2]: Allow phy reset to be skipped during chip reset. Andy Gospodarek found that netconsole would panic when resetting bnx2 devices. >>From Andy: "The issue is the bnx2_set_link in bnx2_init_nic will print a link-status message before we are fully initialized and ready to start polling. Polling is currently disabled in this state, but since the __LINK_STATE_RX_SCHED is overloaded to not only try and disable polling but also to make the system aware there is something waiting to be polled, we really have to fix this in drivers. The problematic call is the one to netif_rx_complete as it tries to remove an entry from the poll_list when there isn't one." While this netconsole problem should be fixed separately, we really should not reset the PHY when changing ring sizes, MTU, or other similar settings. The PHY reset causes several seconds of unnecessary link disruptions. Signed-off-by: Michael Chan Cc: Andy Gospodarek --- drivers/net/bnx2.c | 50 +++++++++++++++++++++++++++----------------------- 1 files changed, 27 insertions(+), 23 deletions(-) diff --git a/drivers/net/bnx2.c b/drivers/net/bnx2.c index 4b46e68..934c2bf 100644 --- a/drivers/net/bnx2.c +++ b/drivers/net/bnx2.c @@ -1875,7 +1875,7 @@ bnx2_setup_phy(struct bnx2 *bp, u8 port) } static int -bnx2_init_5709s_phy(struct bnx2 *bp) +bnx2_init_5709s_phy(struct bnx2 *bp, int reset_phy) { u32 val; @@ -1890,7 +1890,8 @@ bnx2_init_5709s_phy(struct bnx2 *bp) bnx2_write_phy(bp, MII_BNX2_AER_AER, MII_BNX2_AER_AER_AN_MMD); bnx2_write_phy(bp, MII_BNX2_BLK_ADDR, MII_BNX2_BLK_ADDR_COMBO_IEEEB0); - bnx2_reset_phy(bp); + if (reset_phy) + bnx2_reset_phy(bp); bnx2_write_phy(bp, MII_BNX2_BLK_ADDR, MII_BNX2_BLK_ADDR_SERDES_DIG); @@ -1924,11 +1925,12 @@ bnx2_init_5709s_phy(struct bnx2 *bp) } static int -bnx2_init_5708s_phy(struct bnx2 *bp) +bnx2_init_5708s_phy(struct bnx2 *bp, int reset_phy) { u32 val; - bnx2_reset_phy(bp); + if (reset_phy) + bnx2_reset_phy(bp); bp->mii_up1 = BCM5708S_UP1; @@ -1981,9 +1983,10 @@ bnx2_init_5708s_phy(struct bnx2 *bp) } static int -bnx2_init_5706s_phy(struct bnx2 *bp) +bnx2_init_5706s_phy(struct bnx2 *bp, int reset_phy) { - bnx2_reset_phy(bp); + if (reset_phy) + bnx2_reset_phy(bp); bp->phy_flags &= ~BNX2_PHY_FLAG_PARALLEL_DETECT; @@ -2018,11 +2021,12 @@ bnx2_init_5706s_phy(struct bnx2 *bp) } static int -bnx2_init_copper_phy(struct bnx2 *bp) +bnx2_init_copper_phy(struct bnx2 *bp, int reset_phy) { u32 val; - bnx2_reset_phy(bp); + if (reset_phy) + bnx2_reset_phy(bp); if (bp->phy_flags & BNX2_PHY_FLAG_CRC_FIX) { bnx2_write_phy(bp, 0x18, 0x0c00); @@ -2070,7 +2074,7 @@ bnx2_init_copper_phy(struct bnx2 *bp) static int -bnx2_init_phy(struct bnx2 *bp) +bnx2_init_phy(struct bnx2 *bp, int reset_phy) { u32 val; int rc = 0; @@ -2096,14 +2100,14 @@ bnx2_init_phy(struct bnx2 *bp) if (bp->phy_flags & BNX2_PHY_FLAG_SERDES) { if (CHIP_NUM(bp) == CHIP_NUM_5706) - rc = bnx2_init_5706s_phy(bp); + rc = bnx2_init_5706s_phy(bp, reset_phy); else if (CHIP_NUM(bp) == CHIP_NUM_5708) - rc = bnx2_init_5708s_phy(bp); + rc = bnx2_init_5708s_phy(bp, reset_phy); else if (CHIP_NUM(bp) == CHIP_NUM_5709) - rc = bnx2_init_5709s_phy(bp); + rc = bnx2_init_5709s_phy(bp, reset_phy); } else { - rc = bnx2_init_copper_phy(bp); + rc = bnx2_init_copper_phy(bp, reset_phy); } setup_phy: @@ -4873,7 +4877,7 @@ bnx2_reset_nic(struct bnx2 *bp, u32 reset_code) } static int -bnx2_init_nic(struct bnx2 *bp) +bnx2_init_nic(struct bnx2 *bp, int reset_phy) { int rc; @@ -4881,7 +4885,7 @@ bnx2_init_nic(struct bnx2 *bp) return rc; spin_lock_bh(&bp->phy_lock); - bnx2_init_phy(bp); + bnx2_init_phy(bp, reset_phy); bnx2_set_link(bp); if (bp->phy_flags & BNX2_PHY_FLAG_REMOTE_PHY_CAP) bnx2_remote_phy_event(bp); @@ -5269,7 +5273,7 @@ bnx2_test_loopback(struct bnx2 *bp) bnx2_reset_nic(bp, BNX2_DRV_MSG_CODE_RESET); spin_lock_bh(&bp->phy_lock); - bnx2_init_phy(bp); + bnx2_init_phy(bp, 1); spin_unlock_bh(&bp->phy_lock); if (bnx2_run_loopback(bp, BNX2_MAC_LOOPBACK)) rc |= BNX2_MAC_LOOPBACK_FAILED; @@ -5659,7 +5663,7 @@ bnx2_open(struct net_device *dev) return rc; } - rc = bnx2_init_nic(bp); + rc = bnx2_init_nic(bp, 1); if (rc) { bnx2_napi_disable(bp); @@ -5691,7 +5695,7 @@ bnx2_open(struct net_device *dev) bnx2_setup_int_mode(bp, 1); - rc = bnx2_init_nic(bp); + rc = bnx2_init_nic(bp, 0); if (!rc) rc = bnx2_request_irq(bp); @@ -5727,7 +5731,7 @@ bnx2_reset_task(struct work_struct *work) bp->in_reset_task = 1; bnx2_netif_stop(bp); - bnx2_init_nic(bp); + bnx2_init_nic(bp, 1); atomic_set(&bp->intr_sem, 1); bnx2_netif_start(bp); @@ -6421,7 +6425,7 @@ bnx2_set_coalesce(struct net_device *dev, struct ethtool_coalesce *coal) if (netif_running(bp->dev)) { bnx2_netif_stop(bp); - bnx2_init_nic(bp); + bnx2_init_nic(bp, 0); bnx2_netif_start(bp); } @@ -6464,7 +6468,7 @@ bnx2_change_ring_size(struct bnx2 *bp, u32 rx, u32 tx) rc = bnx2_alloc_mem(bp); if (rc) return rc; - bnx2_init_nic(bp); + bnx2_init_nic(bp, 0); bnx2_netif_start(bp); } return 0; @@ -6732,7 +6736,7 @@ bnx2_self_test(struct net_device *dev, struct ethtool_test *etest, u64 *buf) bnx2_reset_chip(bp, BNX2_DRV_MSG_CODE_RESET); } else { - bnx2_init_nic(bp); + bnx2_init_nic(bp, 1); bnx2_netif_start(bp); } @@ -7619,7 +7623,7 @@ bnx2_resume(struct pci_dev *pdev) bnx2_set_power_state(bp, PCI_D0); netif_device_attach(dev); - bnx2_init_nic(bp); + bnx2_init_nic(bp, 1); bnx2_netif_start(bp); return 0; } -- 1.5.5.GIT