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lspci showing "!!! Unknown header type 7"
vinuchandran
Join Date: 1 Dec 20
Posts: 13
Posted: Wed, 2020-12-02 02:01
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Hi,

I'm trying to connect one card to PCIe2. But it's not getting enumerated.

The output of lspci -vvv is the following.  (Same for both with/without any external devices connected)

00:00.0 PCI bridge: Qualcomm Device 010b (rev ff) (prog-if 00 [Normal decode])
!!! Unknown header type 7f
Kernel driver in use: pci-msm-rc
 
01:00.0 Unassigned class [ff00]: Qualcomm Device 1101 (rev ff) (prog-if ff)
!!! Unknown header type 7f
Kernel driver in use: cnss_pci
Also, the following message (from the WiFi driver, I guess) comes in the kernel log continuously, in a one minute interval.
[Dec 2 09:53] cnss: Runtime resume start
[  +0.000270] cnss: Resuming PCI link
[  +0.005312] cnss: Set PCI link status to: 2
[  +0.004223] cnss: Setting MHI state: RESUME(7)
[  +0.018215] cnss: Runtime resume status: 0
[  +0.513054] cnss: Runtime suspend start
[  +0.001460] [kworke][0x22ae500f6][09:53:10.700194] wlan: [1458:I:PMO] pmo_core_is_wow_applicable: 319: lpass enabled, enabling wow
[  +0.000387] [kworke][0x22ae51e40][09:53:10.700585] wlan: [1458:I:PMO] pmo_core_enable_wow_in_fw: 799: drv wow is enabled
[  +0.000130] [kworke][0x22ae52804][09:53:10.700715] wlan: [1458:I:WMI] suspend type: WOW_IFACE_PAUSE_ENABLED
[  +0.039803] cnss: Setting MHI state: SUSPEND(6)
[  +0.000139] cnss: Suspending PCI link
[  +0.000050] cnss: Use PCIe DRV suspend
[  +0.000052] cnss: Set PCI link status to: 0
[  +0.008488] cnss: Runtime suspend status: 0
 
Is the pcie_msm driver proper?
What should be done to get the card enumerated?
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Re: lspci showing "!!! Unknown header type 7"
vinuchandran
Join Date: 1 Dec 20
Posts: 13
Posted: Wed, 2020-12-02 03:07
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Adding some additional information.

I also tried to select RC1 with rc_sel under /sys/kernel/debug/pci-msm.

It gave the following result.

[Dec 2 10:50] PCIe: rc_sel is now: 0x2
[  +0.000067] PCIe: the following RC(s) will be tested:
[  +0.000048] RC 1

Also, I tried to enumerate by giving 11 to case under /sys/kernel/debug/pci-msm, but it failed. See the dmesg below.

[Dec 2 10:51] PCIe: TEST: 11

[  +0.000094] msm_pcie_sel_debug_testcase: 
              
              PCIe: attempting to enumerate RC1
 
[  +0.000158] msm_pcie_enable: PCIe: Assert the reset of endpoint of RC1.
[  +0.009052] msm_pcie_enable: PCIe: RC1: PCIE20_PARF_INT_ALL_MASK: 0x7f80c202
[  +0.005492] pcie_phy_init: PCIe RC1 PHY is ready!
[  +0.015354] msm_pcie_enable: PCIe: Release the reset of endpoint of RC1.
[  +0.119370] msm_pcie_link_train: PCIe: Assert the reset of endpoint of RC1.
[  +0.000093] msm_pcie_link_train: PCIe RC1 link initialization failed
[  +0.004398] msm_pcie_enumerate: PCIe: RC1: failed to enable
[  +0.000072] msm_pcie_sel_debug_testcase: PCIe: RC1 enumeration failed
I also tried to disable the link by giving 2 to case, but it also failed.
Which gave the following log.
[Dec 2 10:53] PCIe: TEST: 1
[  +0.000095] msm_pcie_sel_debug_testcase: 
              
              PCIe: RC1: disable link
 
[  +0.000061] PCIe: endpoint device is NULL
[  +0.000066] msm_pcie_sel_debug_testcase: PCIe:msm_pcie_sel_debug_testcase:failed to disable link

I also tried to dump the PCIe reg space by giving 14 to case.

It gave the following message.

[  +5.475269] PCIe: TEST: 14
[  +0.000085] msm_pcie_sel_debug_testcase: PCIe: RC1 Resource does not exist
All of these messages come, irrespective of the presence of my PCIe Card.
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Re: lspci showing "!!! Unknown header type 7"
vinuchandran
Join Date: 1 Dec 20
Posts: 13
Posted: Wed, 2020-12-02 20:44
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Additional information:

These messages come in dmesg while booting up.

[   11.334980] pcie:pcie_init.
[   11.344128] register_client_adhoc:Client handle 12 pcie0
[   11.350439] pci-msm 1c00000.qcom,pcie: 1c00000.qcom,pcie supply vreg-3p3 not found, using dummy regulator
[   11.365960] pci-msm 1c00000.qcom,pcie: Linked as a consumer to regulator.0
[   11.373226] pci-msm 1c00000.qcom,pcie: Linked as a consumer to regulator.18
[   11.380557] pci-msm 1c00000.qcom,pcie: Linked as a consumer to regulator.13
[   11.387849] pci-msm 1c00000.qcom,pcie: Linked as a consumer to regulator.4
[   11.395157] pci-msm 1c00000.qcom,pcie: Linked as a consumer to regulator.59
[   11.403120] msm_pcie_get_reg: PCIe: RC0: no tcsr resource found.
[   11.409339] msm_pcie_get_reg: PCIe: RC0: no rumi resource found.
[   11.418050] register_client_adhoc:Client handle 13 pcie1
[   11.424370] pci-msm 1c08000.qcom,pcie: 1c08000.qcom,pcie supply vreg-3p3 not found, using dummy regulator
[   11.439863] pci-msm 1c08000.qcom,pcie: Linked as a consumer to regulator.0
[   11.447113] pci-msm 1c08000.qcom,pcie: Linked as a consumer to regulator.18
[   11.454440] pci-msm 1c08000.qcom,pcie: Linked as a consumer to regulator.13
[   11.461752] pci-msm 1c08000.qcom,pcie: Linked as a consumer to regulator.4
[   11.469054] pci-msm 1c08000.qcom,pcie: Linked as a consumer to regulator.60
[   11.476818] msm_pcie_get_reg: PCIe: RC1: no tcsr resource found.
[   11.483016] msm_pcie_get_reg: PCIe: RC1: no rumi resource found.
[   11.489236] msm_pcie_probe: PCIe: RC1 could not get pinctrl sleep state
[   15.133071] msm_pcie_enable: PCIe: Assert the reset of endpoint of RC0.
[   15.148894] msm_pcie_enable: PCIe: RC0: PCIE20_PARF_INT_ALL_MASK: 0x7f80c202
[   15.151516] pcie_phy_init: PCIe RC0 PHY is ready!
[   15.161546] msm_pcie_enable: PCIe: Release the reset of endpoint of RC0.
[   15.199725] msm_pcie_link_train: PCIe RC0 link initialized
[   15.213972] pci-msm 1c00000.qcom,pcie: host bridge /soc/qcom,pcie@1c00000 ranges:
[   15.227794] pci-msm 1c00000.qcom,pcie:   No bus range found for /soc/qcom,pcie@1c00000, using [bus 00-ff]
[   15.227830] pci-msm 1c00000.qcom,pcie:    IO 0x60200000..0x602fffff -> 0x60200000
[   15.239772] pci-msm 1c00000.qcom,pcie:   MEM 0x60300000..0x63ffffff -> 0x60300000
[   15.252460] pci-msm 1c00000.qcom,pcie: PCI host bridge to bus 0000:00
[   15.567553] msm_pcie_enumerate: PCIe: RC0: has already been enumerated.
[   16.179232] msm_pcie_disable: PCIe: Assert the reset of endpoint of RC0.
[   38.700942] msm_pcie_enable: PCIe: Assert the reset of endpoint of RC0.
[   38.704819] msm_pcie_enable: PCIe: RC0: PCIE20_PARF_INT_ALL_MASK: 0x7f80c202
[   38.707166] pcie_phy_init: PCIe RC0 PHY is ready!
[   38.719542] msm_pcie_enable: PCIe: Release the reset of endpoint of RC0.
[   38.736410] msm_pcie_link_train: PCIe RC0 link initialized
Are the "pcie supply vreg-3p3 not found, using dummy regulator" and "PCIe: RC1 could not get pinctrl sleep state" expected?
 
Also when I try to read the config space, without connecting the device, I'm getting the following.
 
$ sudo lspci -x
00:00.0 PCI bridge: Qualcomm Device 010b (rev ff)
00: ff ff ff ff ff ff ff ff ff 00 04 06 ff ff ff ff
10: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
20: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
30: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 
01:00.0 Unassigned class [ff00]: Qualcomm Device 1101 (rev ff)
00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
10: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
20: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
30: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 

 

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