From 38eb394e33d65abb9d05411547d2058db53b4d23 Mon Sep 17 00:00:00 2001 From: Bruce Allan Date: Thu, 19 Nov 2009 12:34:20 +0000 Subject: e1000e: partial revert of 3ec2a2b8 plus FC workraround for 82577/8 Commit 3ec2a2b80f3eb53851fe4cef9e65b5d33376ef89 broke Tx/Rx when using jumbo frames on certain parts (i.e. only PAUSE frames could be exchanged once the high water mark was reached preventing normal packet traffic). This patch reverts the breakage and sets appropriate high and low water marks of the Rx FIFO for 82577/82578 which require a workaround due to a flow control issue in hardware. Signed-off-by: Bruce Allan Signed-off-by: Jeff Kirsher Signed-off-by: David S. Miller --- drivers/net/e1000e/e1000.h | 2 ++ drivers/net/e1000e/ich8lan.c | 1 + drivers/net/e1000e/netdev.c | 41 +++++++++++++++++++++++++++++------------ 3 files changed, 32 insertions(+), 12 deletions(-) (limited to 'drivers/net/e1000e') diff --git a/drivers/net/e1000e/e1000.h b/drivers/net/e1000e/e1000.h index 189dfa2d6c7..3e187b0e420 100644 --- a/drivers/net/e1000e/e1000.h +++ b/drivers/net/e1000e/e1000.h @@ -141,6 +141,8 @@ struct e1000_info; #define HV_TNCRS_UPPER PHY_REG(778, 29) /* Transmit with no CRS */ #define HV_TNCRS_LOWER PHY_REG(778, 30) +#define E1000_FCRTV_PCH 0x05F40 /* PCH Flow Control Refresh Timer Value */ + /* BM PHY Copper Specific Status */ #define BM_CS_STATUS 17 #define BM_CS_STATUS_LINK_UP 0x0400 diff --git a/drivers/net/e1000e/ich8lan.c b/drivers/net/e1000e/ich8lan.c index 51ddb04ab19..92cf1033365 100644 --- a/drivers/net/e1000e/ich8lan.c +++ b/drivers/net/e1000e/ich8lan.c @@ -3558,6 +3558,7 @@ struct e1000_info e1000_pch_info = { | FLAG_HAS_AMT | FLAG_HAS_FLASH | FLAG_HAS_JUMBO_FRAMES + | FLAG_DISABLE_FC_PAUSE_TIME /* errata */ | FLAG_APME_IN_WUC, .pba = 26, .max_hw_frame_size = 4096, diff --git a/drivers/net/e1000e/netdev.c b/drivers/net/e1000e/netdev.c index 0687c6aa4e4..a1a5a6f15a6 100644 --- a/drivers/net/e1000e/netdev.c +++ b/drivers/net/e1000e/netdev.c @@ -2769,25 +2769,38 @@ void e1000e_reset(struct e1000_adapter *adapter) /* * flow control settings * - * The high water mark must be low enough to fit two full frame + * The high water mark must be low enough to fit one full frame * (or the size used for early receive) above it in the Rx FIFO. * Set it to the lower of: * - 90% of the Rx FIFO size, and * - the full Rx FIFO size minus the early receive size (for parts * with ERT support assuming ERT set to E1000_ERT_2048), or - * - the full Rx FIFO size minus two full frames + * - the full Rx FIFO size minus one full frame */ - if ((adapter->flags & FLAG_HAS_ERT) && - (adapter->netdev->mtu > ETH_DATA_LEN)) - hwm = min(((pba << 10) * 9 / 10), - ((pba << 10) - (E1000_ERT_2048 << 3))); - else - hwm = min(((pba << 10) * 9 / 10), - ((pba << 10) - (2 * adapter->max_frame_size))); + if (hw->mac.type == e1000_pchlan) { + /* + * Workaround PCH LOM adapter hangs with certain network + * loads. If hangs persist, try disabling Tx flow control. + */ + if (adapter->netdev->mtu > ETH_DATA_LEN) { + fc->high_water = 0x3500; + fc->low_water = 0x1500; + } else { + fc->high_water = 0x5000; + fc->low_water = 0x3000; + } + } else { + if ((adapter->flags & FLAG_HAS_ERT) && + (adapter->netdev->mtu > ETH_DATA_LEN)) + hwm = min(((pba << 10) * 9 / 10), + ((pba << 10) - (E1000_ERT_2048 << 3))); + else + hwm = min(((pba << 10) * 9 / 10), + ((pba << 10) - adapter->max_frame_size)); - fc->high_water = hwm & E1000_FCRTH_RTH; /* 8-byte granularity */ - fc->low_water = (fc->high_water - (2 * adapter->max_frame_size)); - fc->low_water &= E1000_FCRTL_RTL; /* 8-byte granularity */ + fc->high_water = hwm & E1000_FCRTH_RTH; /* 8-byte granularity */ + fc->low_water = fc->high_water - 8; + } if (adapter->flags & FLAG_DISABLE_FC_PAUSE_TIME) fc->pause_time = 0xFFFF; @@ -2813,6 +2826,10 @@ void e1000e_reset(struct e1000_adapter *adapter) if (mac->ops.init_hw(hw)) e_err("Hardware Error\n"); + /* additional part of the flow-control workaround above */ + if (hw->mac.type == e1000_pchlan) + ew32(FCRTV_PCH, 0x1000); + e1000_update_mng_vlan(adapter); /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */ -- cgit v1.2.3 From 842ec8b64ac34e9b245da31b4a5a49c3e744a714 Mon Sep 17 00:00:00 2001 From: Bruce Allan Date: Thu, 19 Nov 2009 12:34:40 +0000 Subject: e1000e: read of PHY register may access wrong page on 82578 Remove unnecessary workaround that mistakenly does not perform a page select operation for PHY registers 29 and 30 (assuming these are the PHY debug port address and data registers) on 82578 which can cause reads of the Transmit with No Carrier Sense statistics register on page 778 to be read from an incorrect page. Also error out if the page select operation fails. Signed-off-by: Bruce Allan Signed-off-by: Jeff Kirsher Signed-off-by: David S. Miller --- drivers/net/e1000e/phy.c | 46 ++++++++++++++++++++++------------------------ 1 file changed, 22 insertions(+), 24 deletions(-) (limited to 'drivers/net/e1000e') diff --git a/drivers/net/e1000e/phy.c b/drivers/net/e1000e/phy.c index 03175b3a2c9..8189d00bfef 100644 --- a/drivers/net/e1000e/phy.c +++ b/drivers/net/e1000e/phy.c @@ -2658,19 +2658,18 @@ static s32 __e1000_read_phy_reg_hv(struct e1000_hw *hw, u32 offset, u16 *data, page = 0; if (reg > MAX_PHY_MULTI_PAGE_REG) { - if ((hw->phy.type != e1000_phy_82578) || - ((reg != I82578_ADDR_REG) && - (reg != I82578_ADDR_REG + 1))) { - u32 phy_addr = hw->phy.addr; + u32 phy_addr = hw->phy.addr; - hw->phy.addr = 1; + hw->phy.addr = 1; - /* Page is shifted left, PHY expects (page x 32) */ - ret_val = e1000e_write_phy_reg_mdic(hw, - IGP01E1000_PHY_PAGE_SELECT, - (page << IGP_PAGE_SHIFT)); - hw->phy.addr = phy_addr; - } + /* Page is shifted left, PHY expects (page x 32) */ + ret_val = e1000e_write_phy_reg_mdic(hw, + IGP01E1000_PHY_PAGE_SELECT, + (page << IGP_PAGE_SHIFT)); + hw->phy.addr = phy_addr; + + if (ret_val) + goto out; } ret_val = e1000e_read_phy_reg_mdic(hw, MAX_PHY_REG_ADDRESS & reg, @@ -2678,7 +2677,7 @@ static s32 __e1000_read_phy_reg_hv(struct e1000_hw *hw, u32 offset, u16 *data, out: /* Revert to MDIO fast mode, if applicable */ if ((hw->phy.type == e1000_phy_82577) && in_slow_mode) - ret_val = e1000_set_mdio_slow_mode_hv(hw, false); + ret_val |= e1000_set_mdio_slow_mode_hv(hw, false); if (!locked) hw->phy.ops.release_phy(hw); @@ -2784,19 +2783,18 @@ static s32 __e1000_write_phy_reg_hv(struct e1000_hw *hw, u32 offset, u16 data, } if (reg > MAX_PHY_MULTI_PAGE_REG) { - if ((hw->phy.type != e1000_phy_82578) || - ((reg != I82578_ADDR_REG) && - (reg != I82578_ADDR_REG + 1))) { - u32 phy_addr = hw->phy.addr; + u32 phy_addr = hw->phy.addr; - hw->phy.addr = 1; + hw->phy.addr = 1; - /* Page is shifted left, PHY expects (page x 32) */ - ret_val = e1000e_write_phy_reg_mdic(hw, - IGP01E1000_PHY_PAGE_SELECT, - (page << IGP_PAGE_SHIFT)); - hw->phy.addr = phy_addr; - } + /* Page is shifted left, PHY expects (page x 32) */ + ret_val = e1000e_write_phy_reg_mdic(hw, + IGP01E1000_PHY_PAGE_SELECT, + (page << IGP_PAGE_SHIFT)); + hw->phy.addr = phy_addr; + + if (ret_val) + goto out; } ret_val = e1000e_write_phy_reg_mdic(hw, MAX_PHY_REG_ADDRESS & reg, @@ -2805,7 +2803,7 @@ static s32 __e1000_write_phy_reg_hv(struct e1000_hw *hw, u32 offset, u16 data, out: /* Revert to MDIO fast mode, if applicable */ if ((hw->phy.type == e1000_phy_82577) && in_slow_mode) - ret_val = e1000_set_mdio_slow_mode_hv(hw, false); + ret_val |= e1000_set_mdio_slow_mode_hv(hw, false); if (!locked) hw->phy.ops.release_phy(hw); -- cgit v1.2.3 From 29afd690636dab36fe437c54b3a9d5e093bdcd9b Mon Sep 17 00:00:00 2001 From: Bruce Allan Date: Thu, 19 Nov 2009 12:35:08 +0000 Subject: e1000e: set flow control thresholds properly after enabling/disabling pause When flow control (pause) parameters were changed via ethtool (i.e. enabled or disabled), the newly calculated thresholds were not being written to the device for non-fiber media. Signed-off-by: Bruce Allan Signed-off-by: Jeff Kirsher Signed-off-by: David S. Miller --- drivers/net/e1000e/ethtool.c | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) (limited to 'drivers/net/e1000e') diff --git a/drivers/net/e1000e/ethtool.c b/drivers/net/e1000e/ethtool.c index 1bf4d2a5d34..e82638ecae8 100644 --- a/drivers/net/e1000e/ethtool.c +++ b/drivers/net/e1000e/ethtool.c @@ -327,10 +327,18 @@ static int e1000_set_pauseparam(struct net_device *netdev, hw->fc.current_mode = hw->fc.requested_mode; - retval = ((hw->phy.media_type == e1000_media_type_fiber) ? - hw->mac.ops.setup_link(hw) : e1000e_force_mac_fc(hw)); + if (hw->phy.media_type == e1000_media_type_fiber) { + retval = hw->mac.ops.setup_link(hw); + /* implicit goto out */ + } else { + retval = e1000e_force_mac_fc(hw); + if (retval) + goto out; + e1000e_set_fc_watermarks(hw); + } } +out: clear_bit(__E1000_RESETTING, &adapter->state); return retval; } -- cgit v1.2.3 From 4c86e0b9455c8fa8122fc2d10935e892838c8568 Mon Sep 17 00:00:00 2001 From: Bruce Allan Date: Thu, 19 Nov 2009 12:35:26 +0000 Subject: e1000e: add Tx timeout factor for 100Mbps On some devices (e.g. 82578) not having a Tx timeout factor when linked at 100Mbps can cause false reports of hardware hangs on busy hubs. Signed-off-by: Bruce Allan Signed-off-by: Jeff Kirsher Signed-off-by: David S. Miller --- drivers/net/e1000e/netdev.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/net/e1000e') diff --git a/drivers/net/e1000e/netdev.c b/drivers/net/e1000e/netdev.c index a1a5a6f15a6..63458270ce1 100644 --- a/drivers/net/e1000e/netdev.c +++ b/drivers/net/e1000e/netdev.c @@ -3627,7 +3627,7 @@ static void e1000_watchdog_task(struct work_struct *work) case SPEED_100: txb2b = 0; netdev->tx_queue_len = 100; - /* maybe add some timeout factor ? */ + adapter->tx_timeout_factor = 10; break; } -- cgit v1.2.3 From 610c992884c80566de31d71ec361a5a7b2a0ed5e Mon Sep 17 00:00:00 2001 From: Bruce Allan Date: Thu, 19 Nov 2009 12:35:45 +0000 Subject: e1000e: flow control thresholds not correct when changing mtu When changing MTU, save it off prior to resetting otherwise the flow control thresholds may be miscalculated. Signed-off-by: Bruce Allan Signed-off-by: Jeff Kirsher Signed-off-by: David S. Miller --- drivers/net/e1000e/netdev.c | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-) (limited to 'drivers/net/e1000e') diff --git a/drivers/net/e1000e/netdev.c b/drivers/net/e1000e/netdev.c index 63458270ce1..fad8f9ea004 100644 --- a/drivers/net/e1000e/netdev.c +++ b/drivers/net/e1000e/netdev.c @@ -4305,8 +4305,10 @@ static int e1000_change_mtu(struct net_device *netdev, int new_mtu) while (test_and_set_bit(__E1000_RESETTING, &adapter->state)) msleep(1); - /* e1000e_down has a dependency on max_frame_size */ + /* e1000e_down -> e1000e_reset dependent on max_frame_size & mtu */ adapter->max_frame_size = max_frame; + e_info("changing MTU from %d to %d\n", netdev->mtu, new_mtu); + netdev->mtu = new_mtu; if (netif_running(netdev)) e1000e_down(adapter); @@ -4336,9 +4338,6 @@ static int e1000_change_mtu(struct net_device *netdev, int new_mtu) adapter->rx_buffer_len = ETH_FRAME_LEN + VLAN_HLEN + ETH_FCS_LEN; - e_info("changing MTU from %d to %d\n", netdev->mtu, new_mtu); - netdev->mtu = new_mtu; - if (netif_running(netdev)) e1000e_up(adapter); else -- cgit v1.2.3 From 189983d469c6d98e64ddfb9f9ce76725cb082ee5 Mon Sep 17 00:00:00 2001 From: Bruce Allan Date: Thu, 19 Nov 2009 12:36:04 +0000 Subject: e1000e: remove unnecessary 82577 workaround causing link issues A workaround for pre-release versions of 82577 is causing link issues on some switches. The workaround is no longer needed on production parts so remove it. Signed-off-by: Bruce Allan Signed-off-by: Jeff Kirsher Signed-off-by: David S. Miller --- drivers/net/e1000e/phy.c | 10 ---------- 1 file changed, 10 deletions(-) (limited to 'drivers/net/e1000e') diff --git a/drivers/net/e1000e/phy.c b/drivers/net/e1000e/phy.c index 8189d00bfef..85f955f7041 100644 --- a/drivers/net/e1000e/phy.c +++ b/drivers/net/e1000e/phy.c @@ -71,7 +71,6 @@ static const u16 e1000_igp_2_cable_length_table[] = #define I82577_CFG_ASSERT_CRS_ON_TX (1 << 15) #define I82577_CFG_ENABLE_DOWNSHIFT (3 << 10) /* auto downshift 100/10 */ #define I82577_CTRL_REG 23 -#define I82577_CTRL_DOWNSHIFT_MASK (7 << 10) /* 82577 specific PHY registers */ #define I82577_PHY_CTRL_2 18 @@ -660,15 +659,6 @@ s32 e1000_copper_link_setup_82577(struct e1000_hw *hw) phy_data |= I82577_CFG_ENABLE_DOWNSHIFT; ret_val = phy->ops.write_phy_reg(hw, I82577_CFG_REG, phy_data); - if (ret_val) - goto out; - - /* Set number of link attempts before downshift */ - ret_val = phy->ops.read_phy_reg(hw, I82577_CTRL_REG, &phy_data); - if (ret_val) - goto out; - phy_data &= ~I82577_CTRL_DOWNSHIFT_MASK; - ret_val = phy->ops.write_phy_reg(hw, I82577_CTRL_REG, phy_data); out: return ret_val; -- cgit v1.2.3 From 818f33313caab9be2a10458500dbed4a88c1b334 Mon Sep 17 00:00:00 2001 From: Bruce Allan Date: Thu, 19 Nov 2009 14:17:30 +0000 Subject: e1000e: do not initiate autonegotiation during OEM configuration When configuring the OEM bits in the PHY on 82577/82578, do not restart autonegotiation if the firmware is blocking it (e.g. when an IDE-R session is active) because the link must not go down. Signed-off-by: Bruce Allan Signed-off-by: Jeff Kirsher Signed-off-by: David S. Miller --- drivers/net/e1000e/ich8lan.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'drivers/net/e1000e') diff --git a/drivers/net/e1000e/ich8lan.c b/drivers/net/e1000e/ich8lan.c index 92cf1033365..eff3f478365 100644 --- a/drivers/net/e1000e/ich8lan.c +++ b/drivers/net/e1000e/ich8lan.c @@ -1118,7 +1118,8 @@ static s32 e1000_oem_bits_config_ich8lan(struct e1000_hw *hw, bool d0_state) oem_reg |= HV_OEM_BITS_LPLU; } /* Restart auto-neg to activate the bits */ - oem_reg |= HV_OEM_BITS_RESTART_AN; + if (!e1000_check_reset_block(hw)) + oem_reg |= HV_OEM_BITS_RESTART_AN; ret_val = hw->phy.ops.write_phy_reg_locked(hw, HV_OEM_BITS, oem_reg); out: -- cgit v1.2.3