Messages in this thread Patch in this message |  | | From | <> | Subject | [PATCH] r8169: don't use MSI-X on RTL8106e | Date | Wed, 15 Aug 2018 14:21:10 +0800 |
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From: Jian-Hong Pan <jian-hong@endlessm.com>
Found the ethernet network on ASUS X441UAR doesn't come back on resume from suspend when using MSI-X. The chip is RTL8106e - version 39.
asus@endless:~$ dmesg | grep r8169 [ 21.848357] libphy: r8169: probed [ 21.848473] r8169 0000:02:00.0 eth0: RTL8106e, 0c:9d:92:32:67:b4, XID 44900000, IRQ 127 [ 22.518860] r8169 0000:02:00.0 enp2s0: renamed from eth0 [ 29.458041] Generic PHY r8169-200:00: attached PHY driver [Generic PHY] (mii_bus:phy_addr=r8169-200:00, irq=IGNORE) [ 63.227398] r8169 0000:02:00.0 enp2s0: Link is Up - 100Mbps/Full - flow control off [ 124.514648] Generic PHY r8169-200:00: attached PHY driver [Generic PHY] (mii_bus:phy_addr=r8169-200:00, irq=IGNORE)
Here is the ethernet controller in detail:
asus@endless:~$ sudo lspci -nnvs 02:00.0 [sudo] password for asus: 02:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8101/2/6E PCI Express Fast/Gigabit Ethernet controller [10ec:8136] (rev 07) Subsystem: ASUSTeK Computer Inc. RTL810xE PCI Express Fast Ethernet controller [1043:200f] Flags: bus master, fast devsel, latency 0, IRQ 16 I/O ports at e000 [size=256] Memory at ef100000 (64-bit, non-prefetchable) [size=4K] Memory at e0000000 (64-bit, prefetchable) [size=16K] Capabilities: [40] Power Management version 3 Capabilities: [50] MSI: Enable- Count=1/1 Maskable- 64bit+ Capabilities: [70] Express Endpoint, MSI 01 Capabilities: [b0] MSI-X: Enable+ Count=4 Masked- Capabilities: [d0] Vital Product Data Capabilities: [100] Advanced Error Reporting Capabilities: [140] Virtual Channel Capabilities: [160] Device Serial Number 01-00-00-00-36-4c-e0-00 Capabilities: [170] Latency Tolerance Reporting Kernel driver in use: r8169 Kernel modules: r8169
Here is the system interrupt table:
asus@endless:~$ cat /proc/interrupts CPU0 CPU1 CPU2 CPU3 0: 22 0 0 0 IO-APIC 2-edge timer 1: 157 42 0 0 IO-APIC 1-edge i8042 8: 0 0 1 0 IO-APIC 8-edge rtc0 9: 10 13 0 0 IO-APIC 9-fasteoi acpi 16: 0 0 0 0 IO-APIC 16-fasteoi i2c_designware.0, i801_smbus 17: 2445 0 3453 0 IO-APIC 17-fasteoi i2c_designware.1, rtl_pci 109: 2 0 0 1 IO-APIC 109-fasteoi FTE1200:00 120: 0 0 0 0 PCI-MSI 458752-edge PCIe PME 121: 0 0 0 0 PCI-MSI 466944-edge PCIe PME 122: 0 0 0 0 PCI-MSI 468992-edge PCIe PME 123: 1465 0 0 21263 PCI-MSI 376832-edge ahci[0000:00:17.0] 124: 0 530 0 0 PCI-MSI 327680-edge xhci_hcd 125: 5204 0 0 0 PCI-MSI 32768-edge i915 126: 0 0 149 0 PCI-MSI 514048-edge snd_hda_intel:card0 127: 0 0 337 0 PCI-MSI 1048576-edge enp2s0 NMI: 0 0 0 0 Non-maskable interrupts LOC: 45049 39474 38978 46677 Local timer interrupts SPU: 0 0 0 0 Spurious interrupts PMI: 0 0 0 0 Performance monitoring interrupts IWI: 619 8 0 1 IRQ work interrupts RTR: 6 0 0 0 APIC ICR read retries RES: 4918 4436 3835 2943 Rescheduling interrupts CAL: 1399 1478 1598 1465 Function call interrupts TLB: 608 513 723 559 TLB shootdowns TRM: 0 0 0 0 Thermal event interrupts THR: 0 0 0 0 Threshold APIC interrupts DFR: 0 0 0 0 Deferred Error APIC interrupts MCE: 0 0 0 0 Machine check exceptions MCP: 3 4 4 4 Machine check polls ERR: 0 MIS: 0 PIN: 0 0 0 0 Posted-interrupt notification event NPI: 0 0 0 0 Nested posted-interrupt event PIW: 0 0 0 0 Posted-interrupt wakeup event
It is the IRQ 127 - PCI-MSI used by enp2s0. However, lspci lists MSI is disabled and MSI-X is enabled which conflicts to the interrupt table.
Falling back to MSI fixes the issue.
Here is the test result with this patch in dmesg:
asus@endless:~$ dmesg | grep r8169 [ 22.017477] libphy: r8169: probed [ 22.017735] r8169 0000:02:00.0 eth0: RTL8106e, 0c:9d:92:32:67:b4, XID 44900000, IRQ 127 [ 22.041489] r8169 0000:02:00.0 enp2s0: renamed from eth0 [ 29.138312] Generic PHY r8169-200:00: attached PHY driver [Generic PHY] (mii_bus:phy_addr=r8169-200:00, irq=IGNORE) [ 30.927359] r8169 0000:02:00.0 enp2s0: Link is Up - 100Mbps/Full - flow control off [ 289.998077] r8169 0000:02:00.0 enp2s0: Link is Up - 100Mbps/Full - flow control off [ 290.508084] Generic PHY r8169-200:00: attached PHY driver [Generic PHY] (mii_bus:phy_addr=r8169-200:00, irq=IGNORE) [ 290.745690] r8169 0000:02:00.0 enp2s0: Link is Down [ 292.367717] r8169 0000:02:00.0 enp2s0: Link is Up - 100Mbps/Full - flow control off
lspci lists MSI is enabled and MSI-X is disabled with this patch:
asus@endless:~/linux-net$ sudo lspci -nnvs 02:00.0 [sudo] password for asus: 02:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8101/2/6E PCI Express Fast/Gigabit Ethernet controller [10ec:8136] (rev 07) Subsystem: ASUSTeK Computer Inc. RTL810xE PCI Express Fast Ethernet controller [1043:200f] Flags: bus master, fast devsel, latency 0, IRQ 127 I/O ports at e000 [size=256] Memory at ef100000 (64-bit, non-prefetchable) [size=4K] Memory at e0000000 (64-bit, prefetchable) [size=16K] Capabilities: [40] Power Management version 3 Capabilities: [50] MSI: Enable+ Count=1/1 Maskable- 64bit+ Capabilities: [70] Express Endpoint, MSI 01 Capabilities: [b0] MSI-X: Enable- Count=4 Masked- Capabilities: [d0] Vital Product Data Capabilities: [100] Advanced Error Reporting Capabilities: [140] Virtual Channel Capabilities: [160] Device Serial Number 01-00-00-00-36-4c-e0-00 Capabilities: [170] Latency Tolerance Reporting Kernel driver in use: r8169 Kernel modules: r8169
Signed-off-by: Jian-Hong Pan <jian-hong@endlessm.com> --- drivers/net/ethernet/realtek/r8169.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-)
diff --git a/drivers/net/ethernet/realtek/r8169.c b/drivers/net/ethernet/realtek/r8169.c index 0d9c3831838f..0efa977c422d 100644 --- a/drivers/net/ethernet/realtek/r8169.c +++ b/drivers/net/ethernet/realtek/r8169.c @@ -7071,17 +7071,20 @@ static int rtl_alloc_irq(struct rtl8169_private *tp) { unsigned int flags; - if (tp->mac_version <= RTL_GIGA_MAC_VER_06) { + switch (tp->mac_version) { + case RTL_GIGA_MAC_VER_01 ... RTL_GIGA_MAC_VER_06: RTL_W8(tp, Cfg9346, Cfg9346_Unlock); RTL_W8(tp, Config2, RTL_R8(tp, Config2) & ~MSIEnable); RTL_W8(tp, Cfg9346, Cfg9346_Lock); flags = PCI_IRQ_LEGACY; - } else if (tp->mac_version == RTL_GIGA_MAC_VER_40) { + break; + case RTL_GIGA_MAC_VER_39 ... RTL_GIGA_MAC_VER_40: /* This version was reported to have issues with resume * from suspend when using MSI-X */ flags = PCI_IRQ_LEGACY | PCI_IRQ_MSI; - } else { + break; + default: flags = PCI_IRQ_ALL_TYPES; } -- 2.11.0
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