linux-kernel - Re: [PATCH net-next 4/6] net: ipa: add support to code for IPA v4.5

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Message-ID: <66089c0e-7591-a74f-79db-e8a38ea2d56a@linaro.org>
Date:   Tue, 1 Dec 2020 12:36:32 -0600
From:   Alex Elder <elder@...aro.org>
To:     Jon Hunter <jonathanh@...dia.com>, davem@...emloft.net,
        kuba@...nel.org
Cc:     evgreen@...omium.org, subashab@...eaurora.org,
        cpratapa@...eaurora.org, bjorn.andersson@...aro.org,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-tegra <linux-tegra@...r.kernel.org>
Subject: Re: [PATCH net-next 4/6] net: ipa: add support to code for IPA v4.5

On 12/1/20 12:11 PM, Jon Hunter wrote:
> 
> On 25/11/2020 20:45, Alex Elder wrote:
>> Update the IPA code to make use of the updated IPA v4.5 register
>> definitions.  Generally what this patch does is, if IPA v4.5
>> hardware is in use:
>>    - Ensure new registers or fields in IPA v4.5 are updated where
>>      required
>>    - Ensure registers or fields not supported in IPA v4.5 are not
>>      examined when read, or are set to 0 when written
>> It does this while preserving the existing functionality for IPA
>> versions lower than v4.5.
>>
>> The values to program for QSB_MAX_READS and QSB_MAX_WRITES and the
>> source and destination resource counts are updated to be correct for
>> all versions through v4.5 as well.
>>
>> Note that IPA_RESOURCE_GROUP_SRC_MAX and IPA_RESOURCE_GROUP_DST_MAX
>> already reflect that 5 is an acceptable number of resources (which
>> IPA v4.5 implements).
>>
>> Signed-off-by: Alex Elder <elder@...aro.org>
> 
> 
> This change is generating the following build error on ARM64 ...

Sorry about that.  Thank you for reporting this, I will investigate.

					-Alex

> In file included from drivers/net/ipa/ipa_main.c:9:0:
> In function ‘u32_encode_bits’,
>      inlined from ‘ipa_hardware_config_qsb.isra.7’ at drivers/net/ipa/ipa_main.c:286:6,
>      inlined from ‘ipa_hardware_config’ at drivers/net/ipa/ipa_main.c:363:2,
>      inlined from ‘ipa_config.isra.12’ at drivers/net/ipa/ipa_main.c:555:2,
>      inlined from ‘ipa_probe’ at drivers/net/ipa/ipa_main.c:835:6:
> ./include/linux/bitfield.h:131:3: error: call to ‘__field_overflow’ declared with attribute error: value doesn't fit into mask
>     __field_overflow();     \
>     ^~~~~~~~~~~~~~~~~~
> ./include/linux/bitfield.h:151:2: note: in expansion of macro ‘____MAKE_OP’
>    ____MAKE_OP(u##size,u##size,,)
>    ^~~~~~~~~~~
> ./include/linux/bitfield.h:154:1: note: in expansion of macro ‘__MAKE_OP’
>   __MAKE_OP(32)
>   ^~~~~~~~~
> 
> Cheers
> Jon
>