(+linux-pci, Fabio, Richard)
Daniel,
I may have two different issues going on here:
1) issues with ath9k MSI interrupts
2) issues with ath9k legacy interrupts on IMX8MM
To rule out the PCIe switch being an issue for me I moved to an
imx8mm-venice-gw71xx-0x which has an IMX8MM and no PCIe switch.
I've found that with MSI enabled globally, but ath9k not using MSI I
fail to get any interrupts from the radio with nothing abnormal from
dmesg:
# uname -r
6.2.0-09243-ge911eb7b8ec1
# cat /proc/cmdline
# lspci -n
00:00.0 0604: 16c3:abcd (rev 01)
01:00.0 0280: 168c:0036 (rev 01)
# dmesg | grep pci
[ 1.524560] imx6q-pcie 33800000.pcie: host bridge
/soc@0/pcie@33800000 ranges:
[ 1.531870] imx6q-pcie 33800000.pcie: IO
0x001ff80000..0x001ff8ffff -> 0x0000000000
[ 1.544109] imx6q-pcie 33800000.pcie: MEM
0x0018000000..0x001fefffff -> 0x0018000000
[ 1.767610] imx6q-pcie 33800000.pcie: iATU: unroll T, 4 ob, 4 ib,
align 64K, limit 4G
[ 1.875571] imx6q-pcie 33800000.pcie: PCIe Gen.1 x1 link up
[ 1.881241] imx6q-pcie 33800000.pcie: PCIe Gen.1 x1 link up
[ 1.886843] imx6q-pcie 33800000.pcie: Link up, Gen1
[ 1.891746] imx6q-pcie 33800000.pcie: PCIe Gen.1 x1 link up
[ 1.897674] imx6q-pcie 33800000.pcie: PCI host bridge to bus 0000:00
[ 1.904078] pci_bus 0000:00: root bus resource [bus 00-ff]
[ 1.909585] pci_bus 0000:00: root bus resource [io 0x0000-0xffff]
[ 1.915784] pci_bus 0000:00: root bus resource [mem 0x18000000-0x1fefffff]
[ 1.922706] pci 0000:00:00.0: [16c3:abcd] type 01 class 0x060400
[ 1.928746] pci 0000:00:00.0: reg 0x10: [mem 0x00000000-0x000fffff]
[ 1.935043] pci 0000:00:00.0: reg 0x38: [mem 0x00000000-0x0000ffff pref]
[ 1.941820] pci 0000:00:00.0: supports D1
[ 1.945849] pci 0000:00:00.0: PME# supported from D0 D1 D3hot D3cold
[ 1.954254] pci 0000:01:00.0: [168c:0036] type 00 class 0x028000
[ 1.960394] pci 0000:01:00.0: reg 0x10: [mem 0x00000000-0x0007ffff 64bit]
[ 1.967342] pci 0000:01:00.0: reg 0x30: [mem 0x00000000-0x0000ffff pref]
[ 1.974389] pci 0000:01:00.0: supports D1 D2
[ 1.978681] pci 0000:01:00.0: PME# supported from D0 D1 D2 D3hot D3cold
[ 1.995483] pci 0000:00:00.0: BAR 0: assigned [mem 0x18000000-0x180fffff]
[ 2.002334] pci 0000:00:00.0: BAR 14: assigned [mem 0x18100000-0x181fffff]
[ 2.009240] pci 0000:00:00.0: BAR 15: assigned [mem
0x18200000-0x182fffff pref]
[ 2.016576] pci 0000:00:00.0: BAR 6: assigned [mem
0x18300000-0x1830ffff pref]
[ 2.023833] pci 0000:01:00.0: BAR 0: assigned [mem
0x18100000-0x1817ffff 64bit]
[ 2.031214] pci 0000:01:00.0: BAR 6: assigned [mem
0x18200000-0x1820ffff pref]
[ 2.038462] pci 0000:00:00.0: PCI bridge to [bus 01-ff]
[ 2.043711] pci 0000:00:00.0: bridge window [mem 0x18100000-0x181fffff]
[ 2.050518] pci 0000:00:00.0: bridge window [mem
0x18200000-0x182fffff pref]
[ 2.058205] pcieport 0000:00:00.0: PME: Signaling with IRQ 205
# dmesg | grep ath
[ 2.064379] ath9k 0000:01:00.0: enabling device (0000 -> 0002)
[ 2.070445] ath: phy0: WB335 2-ANT card detected
[ 2.075092] ath: phy0: Set BT/WLAN RX diversity capability
[ 2.088891] ath: phy0: Enable LNA combining
[ 2.094278] ath: EEPROM regdomain: 0x6a
[ 2.094285] ath: EEPROM indicates we should expect a direct regpair map
[ 2.094293] ath: Country alpha2 being used: 00
[ 2.094297] ath: Regpair used: 0x6a
[ 14.228284] ath9k 0000:01:00.0 wlp1s0: renamed from wlan0
# wpa_supplicant -i wlp1s0 -c wpa_supplicant.conf
Successfully initialized wpa_supplicant
<snip authentication details>
# grep ath /proc/interrupts
204: 0 0 0 0 GICv3 157 Level ath9k
# cat /proc/interrupts
CPU0 CPU1 CPU2 CPU3
11: 2196 1753 1883 3509 GICv3 30 Level
arch_timer
14: 0 0 0 0 GICv3 79 Level
timer@306a0000
15: 0 0 0 0 GICv3 23 Level arm-pmu
16: 0 0 0 0 GICv3 135 Level
302c0000.dma-controller
17: 0 0 0 0 GICv3 66 Level
302b0000.dma-controller
18: 0 0 0 0 GICv3 34 Level
30bd0000.dma-controller
19: 0 0 0 0 GICv3 58 Level
30860000.serial
20: 0 0 0 0 GICv3 60 Level
30880000.serial
21: 503 0 0 0 GICv3 59 Level
30890000.serial
22: 0 0 0 0 GICv3 110 Level
30280000.watchdog
23: 418 0 0 0 GICv3 56 Level mmc2
41: 0 0 0 0 gpio-mxc 15 Edge pps.-1
66: 0 0 0 0 gpio-mxc 6 Level
gateworks-gsc
194: 750 0 0 0 GICv3 67 Level
30a20000.i2c
195: 0 0 0 0 gateworks-gsc 4
Edge 0-0023
196: 25 0 0 0 GICv3 68 Level
30a30000.i2c
197: 0 0 0 0 GICv3 69 Level
30a40000.i2c
198: 0 0 0 0 GICv3 64 Level
30830000.spi
199: 0 0 0 0 GICv3 150 Level
30be0000.ethernet
200: 0 0 0 0 GICv3 151 Level
30be0000.ethernet
201: 0 0 0 0 GICv3 152 Level
30be0000.ethernet
202: 0 0 0 0 GICv3 153 Level
30be0000.ethernet
204: 0 0 0 0 GICv3 157 Level ath9k
205: 0 0 0 0 PCI-MSI 0 Edge
PCIe PME
206: 0 0 0 0 GICv3 72 Level
32e40000.usb
207: 18 0 0 0 GICv3 73 Level
32e50000.usb
208: 0 0 0 0 gateworks-gsc 0
Edge user_pb1x
209: 0 0 0 0 gateworks-gsc 1
Edge key_erased
210: 0 0 0 0 gateworks-gsc 2
Edge eeprom_wp
211: 0 0 0 0 gateworks-gsc 5
Edge tamper
212: 0 0 0 0 gateworks-gsc 7
Edge switch_hold
213: 0 0 0 0 0-0023 2 Edge user_pb
IPI0: 620 751 665 109 Rescheduling interrupts
IPI1: 361 1387 1285 509 Function call interrupts
IPI2: 0 0 0 0 CPU stop interrupts
IPI3: 0 0 0 0 CPU stop (for
crash dump) interrupts
IPI4: 0 0 0 0 Timer broadcast
interrupts
IPI5: 5 9 10 2 IRQ work interrupts
IPI6: 0 0 0 0 CPU wake-up interrupts
Err: 0
^^^ no interrupts from ath9k radio
^^^ is MSI enabled for the controller but ath9k electing to use legacy
INT's a valid configuration?
With MSI disabled globally via pci=nomsi ath9k gets interrupts and works fine:
# cat /proc/cmdline
pci=nomsi
# dmesg | grep ath
[ 2.052527] ath9k 0000:01:00.0: enabling device (0000 -> 0002)
[ 2.058556] ath: phy0: WB335 2-ANT card detected
[ 2.063199] ath: phy0: Set BT/WLAN RX diversity capability
[ 2.077381] ath: phy0: Enable LNA combining
[ 2.082799] ath: EEPROM regdomain: 0x6a
[ 2.082805] ath: EEPROM indicates we should expect a direct regpair map
[ 2.082813] ath: Country alpha2 being used: 00
[ 2.082818] ath: Regpair used: 0x6a
[ 11.620093] ath9k 0000:01:00.0 wlp1s0: renamed from wlan0
# wpa_supplicant -i wlp1s0 -c wpa_supplicant.conf
Successfully initialized wpa_supplicant
<snip authentication details>
#
# grep ath /proc/interrupts
203: 379 0 0 0 GICv3 157 Level
PCIe PME, ath9k
# cat /proc/interrupts
CPU0 CPU1 CPU2 CPU3
11: 1622 2152 3288 2005 GICv3 30 Level
arch_timer
14: 0 0 0 0 GICv3 79 Level
timer@306a0000
15: 0 0 0 0 GICv3 23 Level arm-pmu
16: 0 0 0 0 GICv3 135 Level
302c0000.dma-controller
17: 0 0 0 0 GICv3 66 Level
302b0000.dma-controller
18: 0 0 0 0 GICv3 34 Level
30bd0000.dma-controller
19: 0 0 0 0 GICv3 58 Level
30860000.serial
20: 0 0 0 0 GICv3 60 Level
30880000.serial
21: 597 0 0 0 GICv3 59 Level
30890000.serial
22: 0 0 0 0 GICv3 110 Level
30280000.watchdog
23: 414 0 0 0 GICv3 56 Level mmc2
41: 0 0 0 0 gpio-mxc 15 Edge pps.-1
66: 0 0 0 0 gpio-mxc 6 Level
gateworks-gsc
194: 978 0 0 0 GICv3 67 Level
30a20000.i2c
195: 0 0 0 0 gateworks-gsc 4
Edge 0-0023
196: 25 0 0 0 GICv3 68 Level
30a30000.i2c
197: 0 0 0 0 GICv3 69 Level
30a40000.i2c
198: 0 0 0 0 GICv3 64 Level
30830000.spi
199: 0 0 0 0 GICv3 150 Level
30be0000.ethernet
200: 0 0 0 0 GICv3 151 Level
30be0000.ethernet
201: 0 0 0 0 GICv3 152 Level
30be0000.ethernet
202: 0 0 0 0 GICv3 153 Level
30be0000.ethernet
203: 379 0 0 0 GICv3 157 Level
PCIe PME, ath9k
204: 0 0 0 0 GICv3 72 Level
32e40000.usb
205: 18 0 0 0 GICv3 73 Level
32e50000.usb
206: 0 0 0 0 gateworks-gsc 0
Edge user_pb1x
207: 0 0 0 0 gateworks-gsc 1
Edge key_erased
208: 0 0 0 0 gateworks-gsc 2
Edge eeprom_wp
209: 0 0 0 0 gateworks-gsc 5
Edge tamper
210: 0 0 0 0 gateworks-gsc 7
Edge switch_hold
211: 0 0 0 0 0-0023 2 Edge user_pb
IPI0: 501 506 73 759 Rescheduling interrupts
IPI1: 878 846 718 1169 Function call interrupts
IPI2: 0 0 0 0 CPU stop interrupts
IPI3: 0 0 0 0 CPU stop (for
crash dump) interrupts
IPI4: 0 0 0 0 Timer broadcast
interrupts
IPI5: 5 4 9 20 IRQ work interrupts
IPI6: 0 0 0 0 CPU wake-up interrupts
Err: 0
^^^ legacy interrupts working as long as I disable MSI globally for IMX8MM
And with MSI enabled globally as well as ath9k (ath9k.use_msi=1) ath9k
fails to get interrupts and shows the interrupt error I ran into
previously:
# cat /proc/cmdline
ath9k.use_msi=1
# dmesg | grep ath
[ 0.000000] Kernel command line: ath9k.use_msi=1
[ 2.056381] ath9k 0000:01:00.0: enabling device (0000 -> 0002)
[ 2.062571] ath9k 0000:01:00.0: Using MSI
[ 2.066651] ath: phy0: WB335 2-ANT card detected
[ 2.071288] ath: phy0: Set BT/WLAN RX diversity capability
[ 2.085083] ath: phy0: Enable LNA combining
[ 2.090470] ath: EEPROM regdomain: 0x6a
[ 2.090476] ath: EEPROM indicates we should expect a direct regpair map
[ 2.090484] ath: Country alpha2 being used: 00
[ 2.090489] ath: Regpair used: 0x6a
[ 13.999159] ath9k 0000:01:00.0 wlp1s0: renamed from wlan0
# wpa_supplicant -i wlp1s0 -c wpa_supplicant.conf
Successfully initialized wpa_supplicant
[ 66.790178] ath: phy0: __ath9k_hw_enable_interrupts: _msi_reg = 0x6A0C9C8
[ 66.798000] ath: phy0: __ath9k_hw_enable_interrupts: _msi_reg = 0x6A0C9C8
[ 66.811551] ath: phy0: __ath9k_hw_enable_interrupts: _msi_reg = 0x6A0C9C8
[ 66.937204] ath: phy0: __ath9k_hw_enable_interrupts: _msi_reg = 0x6A0C9C8
[ 66.950679] ath: phy0: __ath9k_hw_enable_interrupts: _msi_reg = 0x6A0C9C8
[ 67.020994] ath: phy0: __ath9k_hw_enable_interrupts: _msi_reg = 0xEA0C9C8
[ 67.092917] ath: phy0: __ath9k_hw_enable_interrupts: _msi_reg = 0xEA0C9C8
[ 67.164905] ath: phy0: __ath9k_hw_enable_interrupts: _msi_reg = 0xEA0C9C8
[ 67.236957] ath: phy0: __ath9k_hw_enable_interrupts: _msi_reg = 0xEA0C9C8
[ 67.308928] ath: phy0: __ath9k_hw_enable_interrupts: _msi_reg = 0xEA0C9C8
[ 67.380902] ath: phy0: __ath9k_hw_enable_interrupts: _msi_reg = 0xEA0C9C8
[ 67.452954] ath: phy0: __ath9k_hw_enable_interrupts: _msi_reg = 0xEA0C9C8
[ 67.524881] ath: phy0: __ath9k_hw_enable_interrupts: _msi_reg = 0xEA0C9C8
[ 67.596917] ath: phy0: __ath9k_hw_enable_interrupts: _msi_reg = 0xEA0C9C8
[ 67.668907] ath: phy0: __ath9k_hw_enable_interrupts: _msi_reg = 0xEA0C9C8
[ 67.740908] ath: phy0: __ath9k_hw_enable_interrupts: _msi_reg = 0xEA0C9C8
[ 67.860948] ath: phy0: __ath9k_hw_enable_interrupts: _msi_reg = 0xEA0C9C8
...
<snip authentication details>
# grep ath /proc/interrupts
206: 0 0 0 0 PCI-MSI 524288 Edge
ath9k
# cat /proc/interrupts
CPU0 CPU1 CPU2 CPU3
11: 1421 3067 1999 2767 GICv3 30 Level
arch_timer
14: 0 0 0 0 GICv3 79 Level
timer@306a0000
15: 0 0 0 0 GICv3 23 Level arm-pmu
16: 0 0 0 0 GICv3 135 Level
302c0000.dma-controller
17: 0 0 0 0 GICv3 66 Level
302b0000.dma-controller
18: 0 0 0 0 GICv3 34 Level
30bd0000.dma-controller
19: 0 0 0 0 GICv3 58 Level
30860000.serial
20: 0 0 0 0 GICv3 60 Level
30880000.serial
21: 289 0 0 0 GICv3 59 Level
30890000.serial
22: 0 0 0 0 GICv3 110 Level
30280000.watchdog
23: 390 0 0 0 GICv3 56 Level mmc2
41: 0 0 0 0 gpio-mxc 15 Edge pps.-1
66: 0 0 0 0 gpio-mxc 6 Level
gateworks-gsc
194: 1054 0 0 0 GICv3 67 Level
30a20000.i2c
195: 0 0 0 0 gateworks-gsc 4
Edge 0-0023
196: 25 0 0 0 GICv3 68 Level
30a30000.i2c
197: 0 0 0 0 GICv3 69 Level
30a40000.i2c
198: 0 0 0 0 GICv3 64 Level
30830000.spi
199: 0 0 0 0 GICv3 150 Level
30be0000.ethernet
200: 0 0 0 0 GICv3 151 Level
30be0000.ethernet
201: 0 0 0 0 GICv3 152 Level
30be0000.ethernet
202: 0 0 0 0 GICv3 153 Level
30be0000.ethernet
205: 6891 0 0 0 PCI-MSI 0 Edge
PCIe PME
206: 0 0 0 0 PCI-MSI 524288 Edge
ath9k
207: 0 0 0 0 GICv3 72 Level
32e40000.usb
208: 18 0 0 0 GICv3 73 Level
32e50000.usb
209: 0 0 0 0 gateworks-gsc 0
Edge user_pb1x
210: 0 0 0 0 gateworks-gsc 1
Edge key_erased
211: 0 0 0 0 gateworks-gsc 2
Edge eeprom_wp
212: 0 0 0 0 gateworks-gsc 5
Edge tamper
213: 0 0 0 0 gateworks-gsc 7
Edge switch_hold
214: 0 0 0 0 0-0023 2 Edge user_pb
IPI0: 646 64 692 808 Rescheduling interrupts
IPI1: 1211 893 503 1097 Function call interrupts
IPI2: 0 0 0 0 CPU stop interrupts
IPI3: 0 0 0 0 CPU stop (for
crash dump) interrupts
IPI4: 0 0 0 0 Timer broadcast
interrupts
IPI5: 9 13 12 8 IRQ work interrupts
IPI6: 0 0 0 0 CPU wake-up interrupts
Err: 0
^^^ It looks to me like when using MSI above the interrupts are going
to the PME driver MSI 0 and the ath9k MSI interrupt shows as 524288
which aligns to 4 but seems strange that its so large.
Does this jive with what you encountered?
Note that ath10k which require MSI interrupts are working fine on this
platform and the MSI interrupt is also 524288:
205: 0 0 0 0 PCI-MSI 0 Edge
PCIe PME
206: 632 0 0 0 PCI-MSI 524288 Edge
ath10k_pci
Note that ath11k which requires MSI interrupts is also working fine on
this board:
205: 0 0 0 0 PCI-MSI 0 Edge
PCIe PME
206: 4 0 0 0 PCI-MSI 524288 Edge bhi
207: 4 0 0 0 PCI-MSI 524289 Edge mhi
208: 39 0 0 0 PCI-MSI 524290 Edge mhi
209: 3 0 0 0 PCI-MSI 524291 Edge ce0
210: 26 0 0 1 PCI-MSI 524292 Edge ce1
211: 267 0 0 1 PCI-MSI 524293 Edge ce2
212: 88 0 0 0 PCI-MSI 524294 Edge ce3
213: 0 0 0 1 PCI-MSI 524295 Edge ce5
214: 2 0 0 0 PCI-MSI 524296 Edge
DP_EXT_IRQ
215: 0 0 0 0 PCI-MSI 524297 Edge
DP_EXT_IRQ
216: 0 0 0 0 PCI-MSI 524298 Edge
DP_EXT_IRQ
217: 15 0 0 0 PCI-MSI 524299 Edge
DP_EXT_IRQ
218: 0 0 0 0 PCI-MSI 524300 Edge
DP_EXT_IRQ
219: 2 0 0 0 PCI-MSI 524301 Edge
DP_EXT_IRQ
220: 0 0 0 0 PCI-MSI 524302 Edge
DP_EXT_IRQ
221: 0 0 0 0 PCI-MSI 524303 Edge
DP_EXT_IRQ
Now, if I move back to an imx8mm-venice-gw73xx-0x which has an IMX8MM
and a PCI bridge I can't even get the legacy IRQ configuration to work
(no interrupts):
# cat /proc/cmdline
pci=nomsi
# lspci
00:00.0 PCI bridge: Synopsys, Inc. DWC_usb3 / PCIe bridge (rev 01)
01:00.0 PCI bridge: Pericom Semiconductor Device b404 (rev 01)
02:01.0 PCI bridge: Pericom Semiconductor Device b404 (rev 01)
02:02.0 PCI bridge: Pericom Semiconductor Device b404 (rev 01)
02:03.0 PCI bridge: Pericom Semiconductor Device b404 (rev 01)
04:00.0 Network controller: Qualcomm Atheros QCA9565 / AR9565 Wireless
Network Adapter (rev 01)
05:00.0 Ethernet controller: Microchip Technology / SMSC Device 7430 (rev 11)
# dmesg | grep ath
[ 2.475134] ath9k 0000:04:00.0: enabling device (0000 -> 0002)
[ 2.481157] ath: phy0: WB335 2-ANT card detected
[ 2.485797] ath: phy0: Set BT/WLAN RX diversity capability
[ 2.499443] ath: phy0: Enable LNA combining
[ 2.504837] ath: EEPROM regdomain: 0x6a
[ 2.504845] ath: EEPROM indicates we should expect a direct regpair map
[ 2.504853] ath: Country alpha2 being used: 00
[ 2.504858] ath: Regpair used: 0x6a
[ 10.237297] ath9k 0000:04:00.0 wlp4s0: renamed from wlan0
# wpa_supplicant -i wlp4s0 -c wpa_supplicant.conf
<snip failed auth>
# grep -i pci /proc/interrupts
204: 0 0 0 0 GICv3 157 Level
PCIe PME, ath9k
# cat /proc/interrupts
CPU0 CPU1 CPU2 CPU3
11: 1550 3047 2199 4301 GICv3 30 Level
arch_timer
14: 0 0 0 0 GICv3 79 Level
timer@306a0000
15: 0 0 0 0 GICv3 23 Level arm-pmu
16: 0 0 0 0 GICv3 135 Level
302c0000.dma-controller
17: 0 0 0 0 GICv3 66 Level
302b0000.dma-controller
18: 332 0 0 0 GICv3 34 Level
30bd0000.dma-controller
19: 0 0 0 0 GICv3 58 Level
30860000.serial
20: 773 0 0 0 GICv3 59 Level
30890000.serial
21: 0 0 0 0 GICv3 61 Level
30a60000.serial
22: 0 0 0 0 GICv3 110 Level
30280000.watchdog
23: 433 0 0 0 GICv3 56 Level mmc2
41: 0 0 0 0 gpio-mxc 15 Edge pps.-1
66: 0 0 0 0 gpio-mxc 6 Level
gateworks-gsc
72: 0 0 0 0 gpio-mxc 12 Edge
30b50000.mmc cd
170: 4 0 0 0 gpio-mxc 8 Edge
30880000.serial
194: 1282 0 0 0 GICv3 67 Level
30a20000.i2c
195: 0 0 0 0 gateworks-gsc 4
Edge 0-0023
196: 25 0 0 0 GICv3 68 Level
30a30000.i2c
197: 0 0 0 0 GICv3 69 Level
30a40000.i2c
198: 0 0 0 0 GICv3 60 Level
30880000.serial
199: 0 0 0 0 GICv3 64 Level
30830000.spi
200: 0 0 0 0 GICv3 150 Level
30be0000.ethernet
201: 0 0 0 0 GICv3 151 Level
30be0000.ethernet
202: 0 0 0 0 GICv3 152 Level
30be0000.ethernet
203: 0 0 0 0 GICv3 153 Level
30be0000.ethernet
204: 0 0 0 0 GICv3 157 Level
PCIe PME, ath9k
205: 0 0 0 0 GICv3 72 Level
32e40000.usb
206: 105 0 0 0 GICv3 73 Level
32e50000.usb
207: 6244 0 0 0 GICv3 54 Level mmc0
208: 0 0 0 0 GICv3 55 Level mmc1
209: 0 0 0 0 gateworks-gsc 0
Edge user_pb1x
210: 0 0 0 0 gateworks-gsc 1
Edge key_erased
211: 0 0 0 0 gateworks-gsc 2
Edge eeprom_wp
212: 0 0 0 0 gateworks-gsc 5
Edge tamper
213: 0 0 0 0 gateworks-gsc 7
Edge switch_hold
214: 0 0 0 0 0-0023 2 Edge user_pb
IPI0: 367 486 444 286 Rescheduling interrupts
IPI1: 972 1283 1202 1630 Function call interrupts
IPI2: 0 0 0 0 CPU stop interrupts
IPI3: 0 0 0 0 CPU stop (for
crash dump) interrupts
IPI4: 0 0 0 0 Timer broadcast
interrupts
IPI5: 5 6 7 36 IRQ work interrupts
IPI6: 0 0 0 0 CPU wake-up interrupts
Err: 0
^^^ why no interrupts on this board when disabling MSI globally and
using ath9k legacy interrupts.... something to do with the bridge?
Best Regards,
Tim
On Mon, Mar 20, 2023 at 4:29 AM Daniel Drake <drake@xxxxxxxxxxxxx> wrote:
>
> On Sat, Mar 18, 2023 at 8:17 AM Tim Harvey <tharvey@xxxxxxxxxxxxx> wrote:
> > It seems that Daniel may have been running into something similar back
> > when commit 7368160f0ab0 ("ath9k: add MSI support") was merged
> > [1][2][3]
> >
> > Does anyone have any advice here about what can be going on?
>
> The issue we found earlier was that ath9k MSI is broken unless the MSI
> IRQ number coincidentally is aligned to 4.
>
> Worked around with:
> https://github.com/endlessm/linux/commit/0a2d86a2b9da8f936d873addf0a97e341177fe8a
> https://github.com/endlessm/linux/commit/970d2b4b59465cd926e5213e0feb633f6b623447
>
> IIRC the PCI patch wasn't accepted upstream at the time and I never
> got any response from Atheros/Qualcomm about this device
> hardware/firmware bug.
>
> Daniel
