From 4b79959510e6612d80f8d86022e0cb44eee6f4a2 Mon Sep 17 00:00:00 2001 From: Aaron Ma Date: Tue, 13 Jul 2021 21:00:36 +0800 Subject: igc: fix page fault when thunderbolt is unplugged After unplug thunderbolt dock with i225, pciehp interrupt is triggered, remove call will read/write mmio address which is already disconnected, then cause page fault and make system hang. Check PCI state to remove device safely. Trace: BUG: unable to handle page fault for address: 000000000000b604 Oops: 0000 [#1] SMP NOPTI RIP: 0010:igc_rd32+0x1c/0x90 [igc] Call Trace: igc_ptp_suspend+0x6c/0xa0 [igc] igc_ptp_stop+0x12/0x50 [igc] igc_remove+0x7f/0x1c0 [igc] pci_device_remove+0x3e/0xb0 __device_release_driver+0x181/0x240 Fixes: 13b5b7fd6a4a ("igc: Add support for Tx/Rx rings") Fixes: b03c49cde61f ("igc: Save PTP time before a reset") Signed-off-by: Aaron Ma Tested-by: Dvora Fuxbrumer Signed-off-by: Tony Nguyen --- drivers/net/ethernet/intel/igc/igc_main.c | 32 ++++++++++++++++++------------- drivers/net/ethernet/intel/igc/igc_ptp.c | 3 ++- 2 files changed, 21 insertions(+), 14 deletions(-) diff --git a/drivers/net/ethernet/intel/igc/igc_main.c b/drivers/net/ethernet/intel/igc/igc_main.c index e29aadbc6744..5e9c86ea3a5a 100644 --- a/drivers/net/ethernet/intel/igc/igc_main.c +++ b/drivers/net/ethernet/intel/igc/igc_main.c @@ -149,6 +149,9 @@ static void igc_release_hw_control(struct igc_adapter *adapter) struct igc_hw *hw = &adapter->hw; u32 ctrl_ext; + if (!pci_device_is_present(adapter->pdev)) + return; + /* Let firmware take over control of h/w */ ctrl_ext = rd32(IGC_CTRL_EXT); wr32(IGC_CTRL_EXT, @@ -4449,26 +4452,29 @@ void igc_down(struct igc_adapter *adapter) igc_ptp_suspend(adapter); - /* disable receives in the hardware */ - rctl = rd32(IGC_RCTL); - wr32(IGC_RCTL, rctl & ~IGC_RCTL_EN); - /* flush and sleep below */ - + if (pci_device_is_present(adapter->pdev)) { + /* disable receives in the hardware */ + rctl = rd32(IGC_RCTL); + wr32(IGC_RCTL, rctl & ~IGC_RCTL_EN); + /* flush and sleep below */ + } /* set trans_start so we don't get spurious watchdogs during reset */ netif_trans_update(netdev); netif_carrier_off(netdev); netif_tx_stop_all_queues(netdev); - /* disable transmits in the hardware */ - tctl = rd32(IGC_TCTL); - tctl &= ~IGC_TCTL_EN; - wr32(IGC_TCTL, tctl); - /* flush both disables and wait for them to finish */ - wrfl(); - usleep_range(10000, 20000); + if (pci_device_is_present(adapter->pdev)) { + /* disable transmits in the hardware */ + tctl = rd32(IGC_TCTL); + tctl &= ~IGC_TCTL_EN; + wr32(IGC_TCTL, tctl); + /* flush both disables and wait for them to finish */ + wrfl(); + usleep_range(10000, 20000); - igc_irq_disable(adapter); + igc_irq_disable(adapter); + } adapter->flags &= ~IGC_FLAG_NEED_LINK_UPDATE; diff --git a/drivers/net/ethernet/intel/igc/igc_ptp.c b/drivers/net/ethernet/intel/igc/igc_ptp.c index 69617d2c1be2..4ae19c6a3247 100644 --- a/drivers/net/ethernet/intel/igc/igc_ptp.c +++ b/drivers/net/ethernet/intel/igc/igc_ptp.c @@ -849,7 +849,8 @@ void igc_ptp_suspend(struct igc_adapter *adapter) adapter->ptp_tx_skb = NULL; clear_bit_unlock(__IGC_PTP_TX_IN_PROGRESS, &adapter->state); - igc_ptp_time_save(adapter); + if (pci_device_is_present(adapter->pdev)) + igc_ptp_time_save(adapter); } /** -- cgit v1.2.3-70-g09d2 From 691bd4d7761992914a0e83c27a4ce57d01474cda Mon Sep 17 00:00:00 2001 From: Toshiki Nishioka Date: Wed, 21 Jul 2021 17:34:03 -0700 Subject: igc: Use num_tx_queues when iterating over tx_ring queue Use num_tx_queues rather than the IGC_MAX_TX_QUEUES fixed number 4 when iterating over tx_ring queue since instantiated queue count could be less than 4 where on-line cpu count is less than 4. Fixes: ec50a9d437f0 ("igc: Add support for taprio offloading") Signed-off-by: Toshiki Nishioka Signed-off-by: Muhammad Husaini Zulkifli Tested-by: Muhammad Husaini Zulkifli Acked-by: Sasha Neftin Signed-off-by: Tony Nguyen --- drivers/net/ethernet/intel/igc/igc_main.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/net/ethernet/intel/igc/igc_main.c b/drivers/net/ethernet/intel/igc/igc_main.c index 5e9c86ea3a5a..ed2d66bc2d6c 100644 --- a/drivers/net/ethernet/intel/igc/igc_main.c +++ b/drivers/net/ethernet/intel/igc/igc_main.c @@ -5495,7 +5495,7 @@ static bool validate_schedule(struct igc_adapter *adapter, if (e->command != TC_TAPRIO_CMD_SET_GATES) return false; - for (i = 0; i < IGC_MAX_TX_QUEUES; i++) { + for (i = 0; i < adapter->num_tx_queues; i++) { if (e->gate_mask & BIT(i)) queue_uses[i]++; @@ -5552,7 +5552,7 @@ static int igc_save_qbv_schedule(struct igc_adapter *adapter, end_time += e->interval; - for (i = 0; i < IGC_MAX_TX_QUEUES; i++) { + for (i = 0; i < adapter->num_tx_queues; i++) { struct igc_ring *ring = adapter->tx_ring[i]; if (!(e->gate_mask & BIT(i))) -- cgit v1.2.3-70-g09d2 From 44a13a5d99c71bf9e1676d9e51679daf4d7b3d73 Mon Sep 17 00:00:00 2001 From: Sasha Neftin Date: Sun, 4 Jul 2021 10:11:41 +0300 Subject: e1000e: Fix the max snoop/no-snoop latency for 10M We should decode the latency and the max_latency before directly compare. The latency should be presented as lat_enc = scale x value: lat_enc_d = (lat_enc & 0x0x3ff) x (1U << (5*((max_ltr_enc & 0x1c00) >> 10))) Fixes: cf8fb73c23aa ("e1000e: add support for LTR on I217/I218") Suggested-by: Yee Li Signed-off-by: Sasha Neftin Tested-by: Dvora Fuxbrumer Signed-off-by: Tony Nguyen --- drivers/net/ethernet/intel/e1000e/ich8lan.c | 14 +++++++++++++- drivers/net/ethernet/intel/e1000e/ich8lan.h | 3 +++ 2 files changed, 16 insertions(+), 1 deletion(-) diff --git a/drivers/net/ethernet/intel/e1000e/ich8lan.c b/drivers/net/ethernet/intel/e1000e/ich8lan.c index cf7b3887da1d..2c412bf9232a 100644 --- a/drivers/net/ethernet/intel/e1000e/ich8lan.c +++ b/drivers/net/ethernet/intel/e1000e/ich8lan.c @@ -1006,6 +1006,8 @@ static s32 e1000_platform_pm_pch_lpt(struct e1000_hw *hw, bool link) { u32 reg = link << (E1000_LTRV_REQ_SHIFT + E1000_LTRV_NOSNOOP_SHIFT) | link << E1000_LTRV_REQ_SHIFT | E1000_LTRV_SEND; + u16 max_ltr_enc_d = 0; /* maximum LTR decoded by platform */ + u16 lat_enc_d = 0; /* latency decoded */ u16 lat_enc = 0; /* latency encoded */ if (link) { @@ -1059,7 +1061,17 @@ static s32 e1000_platform_pm_pch_lpt(struct e1000_hw *hw, bool link) E1000_PCI_LTR_CAP_LPT + 2, &max_nosnoop); max_ltr_enc = max_t(u16, max_snoop, max_nosnoop); - if (lat_enc > max_ltr_enc) + lat_enc_d = (lat_enc & E1000_LTRV_VALUE_MASK) * + (1U << (E1000_LTRV_SCALE_FACTOR * + ((lat_enc & E1000_LTRV_SCALE_MASK) + >> E1000_LTRV_SCALE_SHIFT))); + + max_ltr_enc_d = (max_ltr_enc & E1000_LTRV_VALUE_MASK) * + (1U << (E1000_LTRV_SCALE_FACTOR * + ((max_ltr_enc & E1000_LTRV_SCALE_MASK) + >> E1000_LTRV_SCALE_SHIFT))); + + if (lat_enc_d > max_ltr_enc_d) lat_enc = max_ltr_enc; } diff --git a/drivers/net/ethernet/intel/e1000e/ich8lan.h b/drivers/net/ethernet/intel/e1000e/ich8lan.h index 1502895eb45d..e757896287eb 100644 --- a/drivers/net/ethernet/intel/e1000e/ich8lan.h +++ b/drivers/net/ethernet/intel/e1000e/ich8lan.h @@ -274,8 +274,11 @@ /* Latency Tolerance Reporting */ #define E1000_LTRV 0x000F8 +#define E1000_LTRV_VALUE_MASK 0x000003FF #define E1000_LTRV_SCALE_MAX 5 #define E1000_LTRV_SCALE_FACTOR 5 +#define E1000_LTRV_SCALE_SHIFT 10 +#define E1000_LTRV_SCALE_MASK 0x00001C00 #define E1000_LTRV_REQ_SHIFT 15 #define E1000_LTRV_NOSNOOP_SHIFT 16 #define E1000_LTRV_SEND (1 << 30) -- cgit v1.2.3-70-g09d2 From 4051f68318ca9f3d3becef3b54e70ad2c146df97 Mon Sep 17 00:00:00 2001 From: Sasha Neftin Date: Sun, 18 Jul 2021 07:10:31 +0300 Subject: e1000e: Do not take care about recovery NVM checksum On new platforms, the NVM is read-only. Attempting to update the NVM is causing a lockup to occur. Do not attempt to write to the NVM on platforms where it's not supported. Emit an error message when the NVM checksum is invalid. Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=213667 Fixes: fb776f5d57ee ("e1000e: Add support for Tiger Lake") Suggested-by: Dima Ruinskiy Suggested-by: Vitaly Lifshits Signed-off-by: Sasha Neftin Tested-by: Dvora Fuxbrumer Signed-off-by: Tony Nguyen --- drivers/net/ethernet/intel/e1000e/ich8lan.c | 18 +++++++++++------- 1 file changed, 11 insertions(+), 7 deletions(-) diff --git a/drivers/net/ethernet/intel/e1000e/ich8lan.c b/drivers/net/ethernet/intel/e1000e/ich8lan.c index 2c412bf9232a..a80336c4319b 100644 --- a/drivers/net/ethernet/intel/e1000e/ich8lan.c +++ b/drivers/net/ethernet/intel/e1000e/ich8lan.c @@ -4127,13 +4127,17 @@ static s32 e1000_validate_nvm_checksum_ich8lan(struct e1000_hw *hw) return ret_val; if (!(data & valid_csum_mask)) { - data |= valid_csum_mask; - ret_val = e1000_write_nvm(hw, word, 1, &data); - if (ret_val) - return ret_val; - ret_val = e1000e_update_nvm_checksum(hw); - if (ret_val) - return ret_val; + e_dbg("NVM Checksum Invalid\n"); + + if (hw->mac.type < e1000_pch_cnp) { + data |= valid_csum_mask; + ret_val = e1000_write_nvm(hw, word, 1, &data); + if (ret_val) + return ret_val; + ret_val = e1000e_update_nvm_checksum(hw); + if (ret_val) + return ret_val; + } } return e1000e_validate_nvm_checksum_generic(hw); -- cgit v1.2.3-70-g09d2