ACK: [PATCH 0/4 V2][SRU][K/J] Fix iosm: WWAN cannot build the connection (DW5823e)

[Luke Nowakowski-Krijger]

Acked-by: Luke Nowakowski-Krijger <luke.nowakowskikrijger at canonical.com>

On Thu, Dec 1, 2022 at 11:21 PM Koba Ko <koba.ko at canonical.com> wrote:

> BugLink: https://bugs.launchpad.net/bugs/1998115
>
> [Impact]
>   WWAN(DW5823e) can't build the connection successfully.
>
> [Fix]
>   With INTEL_IOMMU disable config or by forcing intel_iommu=off from
>   grub some of the features of IOSM driver like browsing, flashing &
>   coredump collection is not working.
>
>   When driver calls DMA API - dma_map_single() for tx transfers. It is
>   resulting in dma mapping error.
>
>   Set the device DMA addressing capabilities using dma_set_mask() and
>   remove the INTEL_IOMMU dependency in kconfig so that driver follows
>   the platform config either INTEL_IOMMU enable or disable.
>
>   Because the generic jammy(5.15) doesn't contain NET_DEVLINK and RELAY
>   CONFIGs yet on iosm module, the single patch is necessary for Jammy.
>
> [Test Case]
>   1. boot up with kernel applied the FIX.
>   2. check the status of wwan by "mmcli -m 0"
>       Status| unlock retries: sim-pin (3)
>             | state: ^[32mconnected^[0m
>             | power state: on
>             | access tech: lte
>             | signal quality: 45% (recent)
>        ----------------------------------
>        3GPP | imei: ######
>             | enabled locks: sim, fixed-dialing
>             | operator id: 46692
>             | operator name: Chunghwa Telecom
>             | registration: home
>             | packet service state: attached
>             | pco:
>             | 0: (complete)
>
> [Where problems could occur]
> remove the dependency for intel_iommu, iosm would fit better on other
> platforms not only Intel.
> ~~~
> V2: Fix the error of compilation on other ARCHes.
> * Because riscv64 is enabled on Kinetic, send two CONFIG patches for J/K.
> * Built for Kinetic,
> [200~remote: *** kernel-cbd
> *********************************************************
> remote: * Queueing builds (your 'k_gen_nxt'); ok to interrupt
> remote: * For results:  ssh cbd ls kobako-kinetic-3c4c6e341c87-OpHy
> remote: * 288/576 cores busy (3/6 hosts), 0 builds queued
> remote: 2022-12-02 05:05:15
> kobako-kinetic-3c4c6e341c87-OpHy/amd64/BUILD-OK
> remote: 2022-12-02 05:05:37
> kobako-kinetic-3c4c6e341c87-OpHy/arm64/BUILD-OK
> remote: 2022-12-02 04:59:24
> kobako-kinetic-3c4c6e341c87-OpHy/armhf/BUILD-OK
> remote: 2022-12-02 05:04:16
> kobako-kinetic-3c4c6e341c87-OpHy/ppc64el/BUILD-OK
> remote: 2022-12-02 04:59:40
> kobako-kinetic-3c4c6e341c87-OpHy/s390x/BUILD-OK
> remote:
> ************************************************************************
>
> Built for Jammy,
> *********************************************************
> remote: * Queueing builds (your 'j_gen_nxt'); ok to interrupt
> remote: * For results:  ssh cbd ls kobako-jammy-c3bfe5915b61-HKLG
> remote: * 0/576 cores busy (0/6 hosts), 0 builds queued
> remote: 2022-12-02 04:17:30  kobako-jammy-c3bfe5915b61-HKLG/amd64/BUILD-OK
> remote: 2022-12-02 04:19:39  kobako-jammy-c3bfe5915b61-HKLG/arm64/BUILD-OK
> remote: 2022-12-02 04:13:31  kobako-jammy-c3bfe5915b61-HKLG/armhf/BUILD-OK
> remote: 2022-12-02 04:18:31
> kobako-jammy-c3bfe5915b61-HKLG/ppc64el/BUILD-OK
> remote: 2022-12-02 04:13:11  kobako-jammy-c3bfe5915b61-HKLG/s390x/BUILD-OK
> remote:
> ************************************************************************
>
>
> Koba Ko (1):
>   [K] UBUNTU: [Config] CONFIG_IOSM update annotations on arm64 armhf
>     ppc64el s390x riscv64
>
> M Chetan Kumar (1):
>   [K] net: wwan: iosm: fix driver not working with INTEL_IOMMU disabled
>
>  debian.master/config/annotations      | 2 +-
>  drivers/net/wwan/Kconfig              | 2 +-
>  drivers/net/wwan/iosm/iosm_ipc_pcie.c | 7 +++++++
>  3 files changed, 9 insertions(+), 2 deletions(-)
>
> --
> 2.25.1
>
>
> --
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> kernel-team at lists.ubuntu.com
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>
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