linux-kernel - Re: [Linaro-acpi] [PATCH V1 1/2] PCI: thunder: Enable ACPI PCI controller for ThunderX pass2.x silicon version

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Date:   Fri, 2 Dec 2016 11:06:24 +0100
From:   Tomasz Nowicki <tn@...ihalf.com>
To:     Duc Dang <dhdang@....com>, Jon Masters <jcm@...hat.com>,
        Bjorn Helgaas <helgaas@...nel.org>
Cc:     Jayachandran C <jchandra@...adcom.com>,
        Gabriele Paoloni <gabriele.paoloni@...wei.com>,
        Arnd Bergmann <arnd@...db.de>,
        Rafael Wysocki <rafael@...nel.org>,
        Catalin Marinas <catalin.marinas@....com>,
        Ard Biesheuvel <ard.biesheuvel@...aro.org>,
        Will Deacon <will.deacon@....com>,
        David Daney <ddaney@...iumnetworks.com>,
        Jeremy Linton <jeremy.linton@....com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linaro ACPI Mailman List <linaro-acpi@...ts.linaro.org>,
        linux-acpi@...r.kernel.org,
        Robert Richter <robert.richter@...iumnetworks.com>,
        linux-pci@...r.kernel.org, Marcin Wojtas <mw@...ihalf.com>,
        Andrea Gallo <andrea.gallo@...aro.org>,
        linux-arm <linux-arm-kernel@...ts.infradead.org>,
        Christopher Covington <cov@...eaurora.org>
Subject: Re: [Linaro-acpi] [PATCH V1 1/2] PCI: thunder: Enable ACPI PCI
 controller for ThunderX pass2.x silicon version

On 02.12.2016 07:42, Duc Dang wrote:
> On Thu, Dec 1, 2016 at 9:50 PM, Jon Masters <jcm@...hat.com> wrote:
>> On 11/30/2016 07:28 PM, Bjorn Helgaas wrote:
>>
>>> I'm hoping to end up with something like this:
>>> https://git.kernel.org/cgit/linux/kernel/git/helgaas/pci.git/commit/?h=pci/ecam&id=51ad4df79a9b7f2a66b346a46b21a785a2937469
>>
>> The following build warnings happen using your branch on RHELSA7.3:
>>
>> drivers/acpi/pci_mcfg.c:101:2: warning: left shift count >= width of type [enabled by default]
>>   THUNDER_PEM_QUIRK(2,  0), /* off-chip devices */
>>   ^
>> drivers/acpi/pci_mcfg.c:101:2: warning: initializer element is not a constant expression [enabled by default]
>> drivers/acpi/pci_mcfg.c:101:2: warning: (near initialization for ‘mcfg_quirks[44].cfgres.start’) [enabled by default]
>> drivers/acpi/pci_mcfg.c:101:2: warning: left shift count >= width of type [enabled by default]
>> drivers/acpi/pci_mcfg.c:101:2: warning: initializer element is not a constant expression [enabled by default]
>> drivers/acpi/pci_mcfg.c:101:2: warning: (near initialization for ‘mcfg_quirks[44].cfgres.end’) [enabled by default]
>> drivers/acpi/pci_mcfg.c:101:2: warning: left shift count >= width of type [enabled by default]
>> drivers/acpi/pci_mcfg.c:101:2: warning: initializer element is not a constant expression [enabled by default]
>> drivers/acpi/pci_mcfg.c:101:2: warning: (near initialization for ‘mcfg_quirks[45].cfgres.start’) [enabled by default]
>> drivers/acpi/pci_mcfg.c:101:2: warning: left shift count >= width of type [enabled by default]
>> drivers/acpi/pci_mcfg.c:101:2: warning: initializer element is not a constant expression [enabled by default]
>> drivers/acpi/pci_mcfg.c:101:2: warning: (near initialization for ‘mcfg_quirks[45].cfgres.end’) [enabled by default]
>> drivers/acpi/pci_mcfg.c:101:2: warning: left shift count >= width of type [enabled by default]
>> drivers/acpi/pci_mcfg.c:101:2: warning: initializer element is not a constant expression [enabled by default]
>> drivers/acpi/pci_mcfg.c:101:2: warning: (near initialization for ‘mcfg_quirks[46].cfgres.start’) [enabled by default]
>> drivers/acpi/pci_mcfg.c:101:2: warning: left shift count >= width of type [enabled by default]
>> drivers/acpi/pci_mcfg.c:101:2: warning: initializer element is not a constant expression [enabled by default]
>> drivers/acpi/pci_mcfg.c:101:2: warning: (near initialization for ‘mcfg_quirks[46].cfgres.end’) [enabled by default]
>> drivers/acpi/pci_mcfg.c:101:2: warning: left shift count >= width of type [enabled by default]
>> drivers/acpi/pci_mcfg.c:101:2: warning: initializer element is not a constant expression [enabled by default]
>> drivers/acpi/pci_mcfg.c:101:2: warning: (near initialization for ‘mcfg_quirks[47].cfgres.start’) [enabled by default]
>> drivers/acpi/pci_mcfg.c:101:2: warning: left shift count >= width of type [enabled by default]
>> drivers/acpi/pci_mcfg.c:101:2: warning: initializer element is not a constant expression [enabled by default]
>> drivers/acpi/pci_mcfg.c:101:2: warning: (near initialization for ‘mcfg_quirks[47].cfgres.end’) [enabled by default]
>> drivers/acpi/pci_mcfg.c:101:2: warning: left shift count >= width of type [enabled by default]
>> drivers/acpi/pci_mcfg.c:101:2: warning: initializer element is not a constant expression [enabled by default]
>> drivers/acpi/pci_mcfg.c:101:2: warning: (near initialization for ‘mcfg_quirks[48].cfgres.start’) [enabled by default]
>> drivers/acpi/pci_mcfg.c:101:2: warning: left shift count >= width of type [enabled by default]
>> drivers/acpi/pci_mcfg.c:101:2: warning: initializer element is not a constant expression [enabled by default]
>> drivers/acpi/pci_mcfg.c:101:2: warning: (near initialization for ‘mcfg_quirks[48].cfgres.end’) [enabled by default]
>> drivers/acpi/pci_mcfg.c:101:2: warning: left shift count >= width of type [enabled by default]
>> drivers/acpi/pci_mcfg.c:101:2: warning: initializer element is not a constant expression [enabled by default]
>> drivers/acpi/pci_mcfg.c:101:2: warning: (near initialization for ‘mcfg_quirks[49].cfgres.start’) [enabled by default]
>> drivers/acpi/pci_mcfg.c:101:2: warning: left shift count >= width of type [enabled by default]
>> drivers/acpi/pci_mcfg.c:101:2: warning: initializer element is not a constant expression [enabled by default]
>> drivers/acpi/pci_mcfg.c:101:2: warning: (near initialization for ‘mcfg_quirks[49].cfgres.end’) [enabled by default]
>> drivers/acpi/pci_mcfg.c:102:2: warning: left shift count >= width of type [enabled by default]
>>   THUNDER_PEM_QUIRK(2,  1), /* off-chip devices */
>>   ^
>> drivers/acpi/pci_mcfg.c:102:2: warning: initializer element is not a constant expression [enabled by default]
>> drivers/acpi/pci_mcfg.c:102:2: warning: (near initialization for ‘mcfg_quirks[50].cfgres.start’) [enabled by default]
>> drivers/acpi/pci_mcfg.c:102:2: warning: left shift count >= width of type [enabled by default]
>> drivers/acpi/pci_mcfg.c:102:2: warning: initializer element is not a constant expression [enabled by default]
>> drivers/acpi/pci_mcfg.c:102:2: warning: (near initialization for ‘mcfg_quirks[50].cfgres.end’) [enabled by default]
>> drivers/acpi/pci_mcfg.c:102:2: warning: left shift count >= width of type [enabled by default]
>> drivers/acpi/pci_mcfg.c:102:2: warning: initializer element is not a constant expression [enabled by default]
>> drivers/acpi/pci_mcfg.c:102:2: warning: (near initialization for ‘mcfg_quirks[51].cfgres.start’) [enabled by default]
>> drivers/acpi/pci_mcfg.c:102:2: warning: left shift count >= width of type [enabled by default]
>> drivers/acpi/pci_mcfg.c:102:2: warning: initializer element is not a constant expression [enabled by default]
>> drivers/acpi/pci_mcfg.c:102:2: warning: (near initialization for ‘mcfg_quirks[51].cfgres.end’) [enabled by default]
>> drivers/acpi/pci_mcfg.c:102:2: warning: left shift count >= width of type [enabled by default]
>> drivers/acpi/pci_mcfg.c:102:2: warning: initializer element is not a constant expression [enabled by default]
>> drivers/acpi/pci_mcfg.c:102:2: warning: (near initialization for ‘mcfg_quirks[52].cfgres.start’) [enabled by default]
>> drivers/acpi/pci_mcfg.c:102:2: warning: left shift count >= width of type [enabled by default]
>> drivers/acpi/pci_mcfg.c:102:2: warning: initializer element is not a constant expression [enabled by default]
>> drivers/acpi/pci_mcfg.c:102:2: warning: (near initialization for ‘mcfg_quirks[52].cfgres.end’) [enabled by default]
>> drivers/acpi/pci_mcfg.c:102:2: warning: left shift count >= width of type [enabled by default]
>> drivers/acpi/pci_mcfg.c:102:2: warning: initializer element is not a constant expression [enabled by default]
>> drivers/acpi/pci_mcfg.c:102:2: warning: (near initialization for ‘mcfg_quirks[53].cfgres.start’) [enabled by default]
>> drivers/acpi/pci_mcfg.c:102:2: warning: left shift count >= width of type [enabled by default]
>> drivers/acpi/pci_mcfg.c:102:2: warning: initializer element is not a constant expression [enabled by default]
>> drivers/acpi/pci_mcfg.c:102:2: warning: (near initialization for ‘mcfg_quirks[53].cfgres.end’) [enabled by default]
>> drivers/acpi/pci_mcfg.c:102:2: warning: left shift count >= width of type [enabled by default]
>> drivers/acpi/pci_mcfg.c:102:2: warning: initializer element is not a constant expression [enabled by default]
>> drivers/acpi/pci_mcfg.c:102:2: warning: (near initialization for ‘mcfg_quirks[54].cfgres.start’) [enabled by default]
>> drivers/acpi/pci_mcfg.c:102:2: warning: left shift count >= width of type [enabled by default]
>> drivers/acpi/pci_mcfg.c:102:2: warning: initializer element is not a constant expression [enabled by default]
>> drivers/acpi/pci_mcfg.c:102:2: warning: (near initialization for ‘mcfg_quirks[54].cfgres.end’) [enabled by default]
>> drivers/acpi/pci_mcfg.c:102:2: warning: left shift count >= width of type [enabled by default]
>> drivers/acpi/pci_mcfg.c:102:2: warning: initializer element is not a constant expression [enabled by default]
>> drivers/acpi/pci_mcfg.c:102:2: warning: (near initialization for ‘mcfg_quirks[55].cfgres.start’) [enabled by default]
>> drivers/acpi/pci_mcfg.c:102:2: warning: left shift count >= width of type [enabled by default]
>> drivers/acpi/pci_mcfg.c:102:2: warning: initializer element is not a constant expression [enabled by default]
>> drivers/acpi/pci_mcfg.c:102:2: warning: (near initialization for ‘mcfg_quirks[55].cfgres.end’) [enabled by default]
>
> I saw this too. It can be fixed by changes below:
>
> diff --git a/drivers/acpi/pci_mcfg.c b/drivers/acpi/pci_mcfg.c
> index 7319188..3d7c5cc 100644
> --- a/drivers/acpi/pci_mcfg.c
> +++ b/drivers/acpi/pci_mcfg.c
> @@ -98,16 +98,16 @@ struct mcfg_fixup {
>         { "CAVIUM", "THUNDERX", rev, seg, MCFG_BUS_ANY,                 \
>         &pci_thunder_ecam_ops }
>         /* SoC pass1.x */
> -   THUNDER_PEM_QUIRK(2,  0),       /* off-chip devices */
> -   THUNDER_PEM_QUIRK(2,  1),       /* off-chip devices */
> -   THUNDER_ECAM_QUIRK(2,  0),
> -   THUNDER_ECAM_QUIRK(2,  1),
> -   THUNDER_ECAM_QUIRK(2,  2),
> -   THUNDER_ECAM_QUIRK(2,  3),
> -   THUNDER_ECAM_QUIRK(2, 10),
> -   THUNDER_ECAM_QUIRK(2, 11),
> -   THUNDER_ECAM_QUIRK(2, 12),
> -   THUNDER_ECAM_QUIRK(2, 13),
> + THUNDER_PEM_QUIRK(2, 0UL),  /* off-chip devices */
> + THUNDER_PEM_QUIRK(2, 1UL),  /* off-chip devices */
> + THUNDER_ECAM_QUIRK(2, 0UL),
> + THUNDER_ECAM_QUIRK(2, 1UL),
> + THUNDER_ECAM_QUIRK(2, 2UL),
> + THUNDER_ECAM_QUIRK(2, 3UL),
> + THUNDER_ECAM_QUIRK(2, 10UL),
> + THUNDER_ECAM_QUIRK(2, 11UL),
> + THUNDER_ECAM_QUIRK(2, 12UL),
> + THUNDER_ECAM_QUIRK(2, 13UL),
>

The UL suffix is needed for *THUNDER_PEM_QUIRK* only. THUNDER_ECAM_QUIRK 
is fine.

-   THUNDER_PEM_QUIRK(2,  0),       /* off-chip devices */
-   THUNDER_PEM_QUIRK(2,  1),       /* off-chip devices */
+   THUNDER_PEM_QUIRK(2, 0UL),  /* off-chip devices */
+   THUNDER_PEM_QUIRK(2, 1UL),  /* off-chip devices */

Tomasz