diff options
Diffstat (limited to 'target/linux/generic/pending-4.9/190-e100e-avoid-receiver-interrupt-bursts.patch')
| -rw-r--r-- | target/linux/generic/pending-4.9/190-e100e-avoid-receiver-interrupt-bursts.patch | 327 |
1 files changed, 0 insertions, 327 deletions
diff --git a/target/linux/generic/pending-4.9/190-e100e-avoid-receiver-interrupt-bursts.patch b/target/linux/generic/pending-4.9/190-e100e-avoid-receiver-interrupt-bursts.patch deleted file mode 100644 index f2966fafbb..0000000000 --- a/target/linux/generic/pending-4.9/190-e100e-avoid-receiver-interrupt-bursts.patch +++ /dev/null @@ -1,327 +0,0 @@ -Subject: [1/5] e1000e: Fix error path in link detection -From: Benjamin Poirier <bpoirier@suse.com> -X-Patchwork-Id: 792259 -Message-Id: <20170721183627.13373-1-bpoirier@suse.com> -To: Jeff Kirsher <jeffrey.t.kirsher@intel.com> -Cc: netdev@vger.kernel.org, intel-wired-lan@lists.osuosl.org, - linux-kernel@vger.kernel.org, - Lennart Sorensen <lsorense@csclub.uwaterloo.ca> -Date: Fri, 21 Jul 2017 11:36:23 -0700 - -In case of error from e1e_rphy(), the loop will exit early and "success" -will be set to true erroneously. - -Signed-off-by: Benjamin Poirier <bpoirier@suse.com> ---- - drivers/net/ethernet/intel/e1000e/phy.c | 7 ++++--- - 1 file changed, 4 insertions(+), 3 deletions(-) - -diff --git a/drivers/net/ethernet/intel/e1000e/phy.c b/drivers/net/ethernet/intel/e1000e/phy.c -index d78d47b41a71..86ff0969efb6 100644 ---- a/drivers/net/ethernet/intel/e1000e/phy.c -+++ b/drivers/net/ethernet/intel/e1000e/phy.c -@@ -1744,6 +1744,7 @@ s32 e1000e_phy_has_link_generic(struct e1000_hw *hw, u32 iterations, - s32 ret_val = 0; - u16 i, phy_status; - -+ *success = false; - for (i = 0; i < iterations; i++) { - /* Some PHYs require the MII_BMSR register to be read - * twice due to the link bit being sticky. No harm doing -@@ -1763,16 +1764,16 @@ s32 e1000e_phy_has_link_generic(struct e1000_hw *hw, u32 iterations, - ret_val = e1e_rphy(hw, MII_BMSR, &phy_status); - if (ret_val) - break; -- if (phy_status & BMSR_LSTATUS) -+ if (phy_status & BMSR_LSTATUS) { -+ *success = true; - break; -+ } - if (usec_interval >= 1000) - msleep(usec_interval / 1000); - else - udelay(usec_interval); - } - -- *success = (i < iterations); -- - return ret_val; - } - - -Subject: [2/5] e1000e: Fix wrong comment related to link detection -From: Benjamin Poirier <bpoirier@suse.com> -X-Patchwork-Id: 792257 -Message-Id: <20170721183627.13373-2-bpoirier@suse.com> -To: Jeff Kirsher <jeffrey.t.kirsher@intel.com> -Cc: netdev@vger.kernel.org, intel-wired-lan@lists.osuosl.org, - linux-kernel@vger.kernel.org, - Lennart Sorensen <lsorense@csclub.uwaterloo.ca> -Date: Fri, 21 Jul 2017 11:36:24 -0700 - -Reading e1000e_check_for_copper_link() shows that get_link_status is set to -false after link has been detected. Therefore, it stays TRUE until then. - -Signed-off-by: Benjamin Poirier <bpoirier@suse.com> ---- - drivers/net/ethernet/intel/e1000e/netdev.c | 4 ++-- - 1 file changed, 2 insertions(+), 2 deletions(-) - -diff --git a/drivers/net/ethernet/intel/e1000e/netdev.c b/drivers/net/ethernet/intel/e1000e/netdev.c -index 2dcb5463d9b8..58a87134d2e5 100644 ---- a/drivers/net/ethernet/intel/e1000e/netdev.c -+++ b/drivers/net/ethernet/intel/e1000e/netdev.c -@@ -5074,7 +5074,7 @@ static bool e1000e_has_link(struct e1000_adapter *adapter) - - /* get_link_status is set on LSC (link status) interrupt or - * Rx sequence error interrupt. get_link_status will stay -- * false until the check_for_link establishes link -+ * true until the check_for_link establishes link - * for copper adapters ONLY - */ - switch (hw->phy.media_type) { -@@ -5092,7 +5092,7 @@ static bool e1000e_has_link(struct e1000_adapter *adapter) - break; - case e1000_media_type_internal_serdes: - ret_val = hw->mac.ops.check_for_link(hw); -- link_active = adapter->hw.mac.serdes_has_link; -+ link_active = hw->mac.serdes_has_link; - break; - default: - case e1000_media_type_unknown: - -Content-Transfer-Encoding: 7bit -Subject: [3/5] e1000e: Fix return value test -From: Benjamin Poirier <bpoirier@suse.com> -X-Patchwork-Id: 792258 -Message-Id: <20170721183627.13373-3-bpoirier@suse.com> -To: Jeff Kirsher <jeffrey.t.kirsher@intel.com> -Cc: netdev@vger.kernel.org, intel-wired-lan@lists.osuosl.org, - linux-kernel@vger.kernel.org, - Lennart Sorensen <lsorense@csclub.uwaterloo.ca> -Date: Fri, 21 Jul 2017 11:36:25 -0700 - -All the helpers return -E1000_ERR_PHY. - -Signed-off-by: Benjamin Poirier <bpoirier@suse.com> ---- - drivers/net/ethernet/intel/e1000e/netdev.c | 2 +- - 1 file changed, 1 insertion(+), 1 deletion(-) - -diff --git a/drivers/net/ethernet/intel/e1000e/netdev.c b/drivers/net/ethernet/intel/e1000e/netdev.c -index 58a87134d2e5..fc6a1d9999b2 100644 ---- a/drivers/net/ethernet/intel/e1000e/netdev.c -+++ b/drivers/net/ethernet/intel/e1000e/netdev.c -@@ -5099,7 +5099,7 @@ static bool e1000e_has_link(struct e1000_adapter *adapter) - break; - } - -- if ((ret_val == E1000_ERR_PHY) && (hw->phy.type == e1000_phy_igp_3) && -+ if ((ret_val == -E1000_ERR_PHY) && (hw->phy.type == e1000_phy_igp_3) && - (er32(CTRL) & E1000_PHY_CTRL_GBE_DISABLE)) { - /* See e1000_kmrn_lock_loss_workaround_ich8lan() */ - e_info("Gigabit has been disabled, downgrading speed\n"); - -Content-Transfer-Encoding: 7bit -Subject: [4/5] e1000e: Separate signaling for link check/link up -From: Benjamin Poirier <bpoirier@suse.com> -X-Patchwork-Id: 792262 -Message-Id: <20170721183627.13373-4-bpoirier@suse.com> -To: Jeff Kirsher <jeffrey.t.kirsher@intel.com> -Cc: netdev@vger.kernel.org, intel-wired-lan@lists.osuosl.org, - linux-kernel@vger.kernel.org, - Lennart Sorensen <lsorense@csclub.uwaterloo.ca> -Date: Fri, 21 Jul 2017 11:36:26 -0700 - -Lennart reported the following race condition: - -\ e1000_watchdog_task - \ e1000e_has_link - \ hw->mac.ops.check_for_link() === e1000e_check_for_copper_link - /* link is up */ - mac->get_link_status = false; - - /* interrupt */ - \ e1000_msix_other - hw->mac.get_link_status = true; - - link_active = !hw->mac.get_link_status - /* link_active is false, wrongly */ - -This problem arises because the single flag get_link_status is used to -signal two different states: link status needs checking and link status is -down. - -Avoid the problem by using the return value of .check_for_link to signal -the link status to e1000e_has_link(). - -Reported-by: Lennart Sorensen <lsorense@csclub.uwaterloo.ca> -Signed-off-by: Benjamin Poirier <bpoirier@suse.com> ---- - drivers/net/ethernet/intel/e1000e/mac.c | 11 ++++++++--- - drivers/net/ethernet/intel/e1000e/netdev.c | 2 +- - 2 files changed, 9 insertions(+), 4 deletions(-) - -diff --git a/drivers/net/ethernet/intel/e1000e/mac.c b/drivers/net/ethernet/intel/e1000e/mac.c -index b322011ec282..f457c5703d0c 100644 ---- a/drivers/net/ethernet/intel/e1000e/mac.c -+++ b/drivers/net/ethernet/intel/e1000e/mac.c -@@ -410,6 +410,9 @@ void e1000e_clear_hw_cntrs_base(struct e1000_hw *hw) - * Checks to see of the link status of the hardware has changed. If a - * change in link status has been detected, then we read the PHY registers - * to get the current speed/duplex if link exists. -+ * -+ * Returns a negative error code (-E1000_ERR_*) or 0 (link down) or 1 (link -+ * up). - **/ - s32 e1000e_check_for_copper_link(struct e1000_hw *hw) - { -@@ -423,7 +426,7 @@ s32 e1000e_check_for_copper_link(struct e1000_hw *hw) - * Change or Rx Sequence Error interrupt. - */ - if (!mac->get_link_status) -- return 0; -+ return 1; - - /* First we want to see if the MII Status Register reports - * link. If so, then we want to get the current speed/duplex -@@ -461,10 +464,12 @@ s32 e1000e_check_for_copper_link(struct e1000_hw *hw) - * different link partner. - */ - ret_val = e1000e_config_fc_after_link_up(hw); -- if (ret_val) -+ if (ret_val) { - e_dbg("Error configuring flow control\n"); -+ return ret_val; -+ } - -- return ret_val; -+ return 1; - } - - /** -diff --git a/drivers/net/ethernet/intel/e1000e/netdev.c b/drivers/net/ethernet/intel/e1000e/netdev.c -index fc6a1d9999b2..5a8ab1136566 100644 ---- a/drivers/net/ethernet/intel/e1000e/netdev.c -+++ b/drivers/net/ethernet/intel/e1000e/netdev.c -@@ -5081,7 +5081,7 @@ static bool e1000e_has_link(struct e1000_adapter *adapter) - case e1000_media_type_copper: - if (hw->mac.get_link_status) { - ret_val = hw->mac.ops.check_for_link(hw); -- link_active = !hw->mac.get_link_status; -+ link_active = ret_val > 0; - } else { - link_active = true; - } - -Content-Transfer-Encoding: 7bit -Subject: [5/5] e1000e: Avoid receiver overrun interrupt bursts -From: Benjamin Poirier <bpoirier@suse.com> -X-Patchwork-Id: 792260 -Message-Id: <20170721183627.13373-5-bpoirier@suse.com> -To: Jeff Kirsher <jeffrey.t.kirsher@intel.com> -Cc: netdev@vger.kernel.org, intel-wired-lan@lists.osuosl.org, - linux-kernel@vger.kernel.org, - Lennart Sorensen <lsorense@csclub.uwaterloo.ca> -Date: Fri, 21 Jul 2017 11:36:27 -0700 - -When e1000e_poll() is not fast enough to keep up with incoming traffic, the -adapter (when operating in msix mode) raises the Other interrupt to signal -Receiver Overrun. - -This is a double problem because 1) at the moment e1000_msix_other() -assumes that it is only called in case of Link Status Change and 2) if the -condition persists, the interrupt is repeatedly raised again in quick -succession. - -Ideally we would configure the Other interrupt to not be raised in case of -receiver overrun but this doesn't seem possible on this adapter. Instead, -we handle the first part of the problem by reverting to the practice of -reading ICR in the other interrupt handler, like before commit 16ecba59bc33 -("e1000e: Do not read ICR in Other interrupt"). Thanks to commit -0a8047ac68e5 ("e1000e: Fix msi-x interrupt automask") which cleared IAME -from CTRL_EXT, reading ICR doesn't interfere with RxQ0, TxQ0 interrupts -anymore. We handle the second part of the problem by not re-enabling the -Other interrupt right away when there is overrun. Instead, we wait until -traffic subsides, napi polling mode is exited and interrupts are -re-enabled. - -Reported-by: Lennart Sorensen <lsorense@csclub.uwaterloo.ca> -Fixes: 16ecba59bc33 ("e1000e: Do not read ICR in Other interrupt") -Signed-off-by: Benjamin Poirier <bpoirier@suse.com> ---- - drivers/net/ethernet/intel/e1000e/defines.h | 1 + - drivers/net/ethernet/intel/e1000e/netdev.c | 33 +++++++++++++++++++++++------ - 2 files changed, 27 insertions(+), 7 deletions(-) - -diff --git a/drivers/net/ethernet/intel/e1000e/defines.h b/drivers/net/ethernet/intel/e1000e/defines.h -index 0641c0098738..afb7ebe20b24 100644 ---- a/drivers/net/ethernet/intel/e1000e/defines.h -+++ b/drivers/net/ethernet/intel/e1000e/defines.h -@@ -398,6 +398,7 @@ - #define E1000_ICR_LSC 0x00000004 /* Link Status Change */ - #define E1000_ICR_RXSEQ 0x00000008 /* Rx sequence error */ - #define E1000_ICR_RXDMT0 0x00000010 /* Rx desc min. threshold (0) */ -+#define E1000_ICR_RXO 0x00000040 /* Receiver Overrun */ - #define E1000_ICR_RXT0 0x00000080 /* Rx timer intr (ring 0) */ - #define E1000_ICR_ECCER 0x00400000 /* Uncorrectable ECC Error */ - /* If this bit asserted, the driver should claim the interrupt */ -diff --git a/drivers/net/ethernet/intel/e1000e/netdev.c b/drivers/net/ethernet/intel/e1000e/netdev.c -index 5a8ab1136566..803edd1a6401 100644 ---- a/drivers/net/ethernet/intel/e1000e/netdev.c -+++ b/drivers/net/ethernet/intel/e1000e/netdev.c -@@ -1910,12 +1910,30 @@ static irqreturn_t e1000_msix_other(int __always_unused irq, void *data) - struct net_device *netdev = data; - struct e1000_adapter *adapter = netdev_priv(netdev); - struct e1000_hw *hw = &adapter->hw; -+ u32 icr; -+ bool enable = true; -+ -+ icr = er32(ICR); -+ if (icr & E1000_ICR_RXO) { -+ ew32(ICR, E1000_ICR_RXO); -+ enable = false; -+ /* napi poll will re-enable Other, make sure it runs */ -+ if (napi_schedule_prep(&adapter->napi)) { -+ adapter->total_rx_bytes = 0; -+ adapter->total_rx_packets = 0; -+ __napi_schedule(&adapter->napi); -+ } -+ } -+ if (icr & E1000_ICR_LSC) { -+ ew32(ICR, E1000_ICR_LSC); -+ hw->mac.get_link_status = true; -+ /* guard against interrupt when we're going down */ -+ if (!test_bit(__E1000_DOWN, &adapter->state)) { -+ mod_timer(&adapter->watchdog_timer, jiffies + 1); -+ } -+ } - -- hw->mac.get_link_status = true; -- -- /* guard against interrupt when we're going down */ -- if (!test_bit(__E1000_DOWN, &adapter->state)) { -- mod_timer(&adapter->watchdog_timer, jiffies + 1); -+ if (enable && !test_bit(__E1000_DOWN, &adapter->state)) { - ew32(IMS, E1000_IMS_OTHER); - } - -@@ -2687,7 +2705,8 @@ static int e1000e_poll(struct napi_struct *napi, int weight) - napi_complete_done(napi, work_done); - if (!test_bit(__E1000_DOWN, &adapter->state)) { - if (adapter->msix_entries) -- ew32(IMS, adapter->rx_ring->ims_val); -+ ew32(IMS, adapter->rx_ring->ims_val | -+ E1000_IMS_OTHER); - else - e1000_irq_enable(adapter); - } -@@ -4204,7 +4223,7 @@ static void e1000e_trigger_lsc(struct e1000_adapter *adapter) - struct e1000_hw *hw = &adapter->hw; - - if (adapter->msix_entries) -- ew32(ICS, E1000_ICS_OTHER); -+ ew32(ICS, E1000_ICS_LSC | E1000_ICS_OTHER); - else - ew32(ICS, E1000_ICS_LSC); - } |