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From: "Toke Høiland-Jørgensen" <toke@redhat.com>
To: Bjorn Helgaas <helgaas@kernel.org>
Cc: "Pali Rohár" <pali@kernel.org>,
	vtolkm@gmail.com, linux-pci@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	"Rob Herring" <robh@kernel.org>,
	"Ilias Apalodimas" <ilias.apalodimas@linaro.org>,
	"Marek Behún" <marek.behun@nic.cz>,
	"Thomas Petazzoni" <thomas.petazzoni@bootlin.com>,
	"Jason Cooper" <jason@lakedaemon.net>
Subject: Re: PCI trouble on mvebu (Turris Omnia)
Date: Thu, 29 Oct 2020 21:18:40 +0100	[thread overview]
Message-ID: <871rhgpyzj.fsf@toke.dk> (raw)
In-Reply-To: <20201029193022.GA476048@bjorn-Precision-5520>

Bjorn Helgaas <helgaas@kernel.org> writes:

> Another experiment: build kernel without CONFIG_PCIEASPM, set $ROOT
> and $NIC appropriately, and try the following:
>
>   # Set $ROOT and $NIC (update to match your system):
>
>     # ROOT=00:02.0
>     # NIC=02:00.0

(these matched the ath10k card, so just went with that)

>   # Dump the Root Port and NIC Link registers:
>
>     # setpci -s$ROOT CAP_EXP+0xc.l              # Link Capabilities
>     # setpci -s$ROOT CAP_EXP+0x10.w             # Link Control
>     # setpci -s$ROOT CAP_EXP+0x12.w             # Link Status

# setpci -s$ROOT CAP_EXP+0xc.l
0003ac12
# setpci -s$ROOT CAP_EXP+0x10.w
0040
# setpci -s$ROOT CAP_EXP+0x12.w
1011

>     # setpci -s$NIC  CAP_EXP+0xc.l              # Link Capabilities
>     # setpci -s$NIC  CAP_EXP+0x10.w             # Link Control
>     # setpci -s$NIC  CAP_EXP+0x12.w             # Link Status

# setpci -s$NIC CAP_EXP+0xc.l
00036c11
# setpci -s$NIC CAP_EXP+0x10.w
0000
# setpci -s$NIC CAP_EXP+0x12.w
1011

>   # Retrain the link:
>
>     # setpci -s$ROOT CAP_EXP+0x10.w=0x0020      # Link Control Retrain Link
>     # sleep 1
>     # setpci -s$ROOT CAP_EXP+0x12.w             # Link Status
>     # setpci -s$NIC  CAP_EXP+0x12.w             # Link Status

# setpci -s$ROOT CAP_EXP+0x10.w=0x0020
# sleep 1
# setpci -s$ROOT CAP_EXP+0x12.w
1011
# setpci -s$NIC CAP_EXP+0x12.w
setpci: 0000:02:00.0: Instance #0 of Capability 0010 not found - there are no capabilities with that id.
# setpci -s$ROOT CAP_EXP+0x10.w
0000

(nothing in the dmesg either) - rebooted before trying the below:

>   # Set CommClk+ and retrain the link:
>
>     # setpci -s$NIC  CAP_EXP+0x10.w=0x0040      # Link Control Common Clock
>     # setpci -s$ROOT CAP_EXP+0x10.w=0x0040      # Link Control Common Clock
>     # setpci -s$ROOT CAP_EXP+0x10.w=0x0060      # Link Control RL + CC
>     # sleep 1
>     # setpci -s$ROOT CAP_EXP+0x12.w             # Link Status
>     # setpci -s$NIC  CAP_EXP+0x12.w             # Link Status

# setpci -s$NIC CAP_EXP+0x10.w=0x0040
# setpci -s$ROOT CAP_EXP+0x10.w=0x0040
# setpci -s$ROOT CAP_EXP+0x10.w=0x0060
# sleep 1
# setpci -s$ROOT CAP_EXP+0x12.w
1011
# setpci -s$NIC CAP_EXP+0x12.w
setpci: 0000:02:00.0: Instance #0 of Capability 0010 not found - there are no capabilities with that id.

# lspci -v
00:01.0 PCI bridge: Marvell Technology Group Ltd. Device 6820 (rev 04) (prog-if 00 [Normal decode])
        Device tree node: /sys/firmware/devicetree/base/soc/pcie/pcie@1,0
        Flags: bus master, fast devsel, latency 0
        Bus: primary=00, secondary=01, subordinate=01, sec-latency=0
        I/O behind bridge: [disabled]
        Memory behind bridge: e0000000-e00fffff [size=1M]
        Prefetchable memory behind bridge: 00000000-000fffff [size=1M]
        Expansion ROM at e0100000 [virtual] [disabled] [size=2K]
        Capabilities: [40] Express Root Port (Slot+), MSI 00
lspci: Unable to load libkmod resources: error -12

00:02.0 PCI bridge: Marvell Technology Group Ltd. Device 6820 (rev 04) (prog-if 00 [Normal decode])
        Device tree node: /sys/firmware/devicetree/base/soc/pcie/pcie@2,0
        Flags: bus master, fast devsel, latency 0
        Bus: primary=00, secondary=02, subordinate=02, sec-latency=0
        I/O behind bridge: [disabled]
        Memory behind bridge: e0200000-e04fffff [size=3M]
        Prefetchable memory behind bridge: 00000000-000fffff [size=1M]
        Expansion ROM at e0500000 [virtual] [disabled] [size=2K]
        Capabilities: [40] Express Root Port (Slot+), MSI 00

00:03.0 PCI bridge: Marvell Technology Group Ltd. Device 6820 (rev 04) (prog-if 00 [Normal decode])
        Device tree node: /sys/firmware/devicetree/base/soc/pcie/pcie@3,0
        Flags: bus master, fast devsel, latency 0
        Bus: primary=00, secondary=03, subordinate=03, sec-latency=0
        I/O behind bridge: [disabled]
        Memory behind bridge: e0600000-e07fffff [size=2M]
        Prefetchable memory behind bridge: 00000000-000fffff [size=1M]
        Expansion ROM at e0800000 [virtual] [disabled] [size=2K]
        Capabilities: [40] Express Root Port (Slot+), MSI 00

01:00.0 Network controller: Qualcomm Atheros AR9287 Wireless Network Adapter (PCI-Express) (rev 01)
        Subsystem: Qualcomm Atheros AR9287 Wireless Network Adapter (PCI-Express)
        Flags: bus master, fast devsel, latency 0, IRQ 60
        Memory at e0000000 (64-bit, non-prefetchable) [size=64K]
        Capabilities: [40] Power Management version 3
        Capabilities: [50] MSI: Enable- Count=1/1 Maskable- 64bit-
        Capabilities: [60] Express Legacy Endpoint, MSI 00
        Capabilities: [100] Advanced Error Reporting
        Capabilities: [140] Virtual Channel
        Capabilities: [160] Device Serial Number 00-15-17-ff-ff-24-14-12
        Capabilities: [170] Power Budgeting <?>
        Kernel driver in use: ath9k

02:00.0 Network controller: Qualcomm Atheros QCA986x/988x 802.11ac Wireless Network Adapter (rev ff) (prog-if ff)
        !!! Unknown header type 7f
        Kernel driver in use: ath10k_pci

03:00.0 Network controller: MEDIATEK Corp. Device 7612
        Subsystem: MEDIATEK Corp. Device 7612
        Flags: bus master, fast devsel, latency 0, IRQ 63
        Memory at e0600000 (64-bit, non-prefetchable) [size=1M]
        Expansion ROM at e0700000 [disabled] [size=64K]
        Capabilities: [40] Power Management version 3
        Capabilities: [50] MSI: Enable- Count=1/1 Maskable- 64bit+
        Capabilities: [70] Express Endpoint, MSI 00
        Capabilities: [100] Advanced Error Reporting
        Capabilities: [148] Device Serial Number 00-00-00-00-00-00-00-00
        Capabilities: [158] Latency Tolerance Reporting
        Capabilities: [160] L1 PM Substates
        Kernel driver in use: mt76x2e


-Toke


  parent reply	other threads:[~2020-10-29 20:18 UTC|newest]

Thread overview: 62+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-27 15:43 PCI trouble on mvebu (Turris Omnia) Toke Høiland-Jørgensen
2020-10-27 17:20 ` Bjorn Helgaas
2020-10-27 17:44   ` ™֟☻̭҇ Ѽ ҉ ®
2020-10-27 18:59     ` Toke Høiland-Jørgensen
2020-10-27 20:20       ` Toke Høiland-Jørgensen
2020-10-27 21:22         ` ™֟☻̭҇ Ѽ ҉ ®
2020-10-27 21:31           ` Toke Høiland-Jørgensen
2020-10-27 22:01             ` ™֟☻̭҇ Ѽ ҉ ®
2020-10-27 22:12               ` Toke Høiland-Jørgensen
2020-10-27 18:56   ` Toke Høiland-Jørgensen
2020-10-28 13:36     ` Toke Høiland-Jørgensen
2020-10-28 14:42       ` Bjorn Helgaas
2020-10-28 15:08         ` Toke Høiland-Jørgensen
2020-10-28 16:40           ` ™֟☻̭҇ Ѽ ҉ ®
2020-10-28 23:16             ` Bjorn Helgaas
2020-10-29 10:09               ` Pali Rohár
2020-10-29 10:56                 ` ™֟☻̭҇ Ѽ ҉ ®
2020-10-29 11:12                 ` Toke Høiland-Jørgensen
2020-10-29 19:30                   ` Bjorn Helgaas
2020-10-29 19:56                     ` ™֟☻̭҇ Ѽ ҉ ®
2020-10-29 19:57                     ` Andrew Lunn
2020-10-29 21:55                       ` Thomas Petazzoni
2020-10-29 20:18                     ` Toke Høiland-Jørgensen [this message]
2020-10-29 22:09                       ` Toke Høiland-Jørgensen
2020-10-29 20:58                     ` Marek Behun
2020-10-30 10:08                       ` Pali Rohár
2020-10-30 10:45                         ` Marek Behun
2020-10-29 21:54                     ` Thomas Petazzoni
2020-10-29 23:15                       ` Toke Høiland-Jørgensen
2020-10-30  8:23                         ` Thomas Petazzoni
2020-10-30 10:15                         ` Pali Rohár
2020-10-29 10:41               ` Toke Høiland-Jørgensen
2020-10-29 11:18                 ` ™֟☻̭҇ Ѽ ҉ ®
2020-10-30 11:23               ` Pali Rohár
2020-10-30 13:02                 ` Toke Høiland-Jørgensen
2020-10-30 14:23                   ` Pali Rohár
2020-10-30 14:54                     ` ™֟☻̭҇ Ѽ ҉ ®
2020-10-31 12:49                       ` Toke Høiland-Jørgensen
2020-11-02 15:24                         ` Pali Rohár
2020-11-02 15:54                           ` Toke Høiland-Jørgensen
2020-11-02 16:18                             ` ™֟☻̭҇ Ѽ ҉ ®
2020-11-02 16:33                               ` Toke Høiland-Jørgensen
2021-03-15 19:58                             ` Pali Rohár
2021-03-16  9:25                               ` Pali Rohár
2021-03-18 22:43                                 ` Toke Høiland-Jørgensen
2021-03-18 23:16                                   ` Pali Rohár
2021-03-26 12:50                                     ` Pali Rohár
2021-03-26 15:25                                       ` Toke Høiland-Jørgensen
2021-03-26 15:34                                         ` Pali Rohár
2021-03-26 16:54                                           ` Toke Høiland-Jørgensen
2021-03-26 17:11                                             ` Pali Rohár
2021-03-26 17:51                                               ` Toke Høiland-Jørgensen
2021-03-29 17:09                                                 ` Pali Rohár
2021-03-31 14:02                                                   ` Toke Høiland-Jørgensen
2021-03-31 16:15                                                     ` Pali Rohár
2021-03-31 16:53                                                       ` Toke Høiland-Jørgensen
2020-10-29  1:21             ` Marek Behun
2020-10-29 15:12           ` Rob Herring
2020-10-27 18:03 ` Marek Behun
2020-10-27 19:00   ` Toke Høiland-Jørgensen
2020-10-27 20:19     ` Marek Behun
2020-10-27 20:49       ` Toke Høiland-Jørgensen

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