All of lore.kernel.org
 help / color / mirror / Atom feed
From: Bjorn Helgaas <helgaas@kernel.org>
To: "Marek Behún" <kabel@kernel.org>
Cc: "Lorenzo Pieralisi" <lorenzo.pieralisi@arm.com>,
	"Gregory CLEMENT" <gregory.clement@bootlin.com>,
	pali@kernel.org, "Krzysztof Wilczyński" <kw@linux.com>,
	linux-pci@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
	"Lukas Wunner" <lukas@wunner.de>
Subject: Re: [PATCH v2 01/10] PCI: pciehp: Enable Command Completed Interrupt only if supported
Date: Wed, 7 Dec 2022 08:29:35 -0600	[thread overview]
Message-ID: <20221207142935.GA1440263@bhelgaas> (raw)
In-Reply-To: <20220927141926.8895-2-kabel@kernel.org>

On Tue, Sep 27, 2022 at 04:19:17PM +0200, Marek Behún wrote:
> From: Pali Rohár <pali@kernel.org>
> 
> The No Command Completed Support bit in the Slot Capabilities register
> indicates whether Command Completed Interrupt Enable is unsupported.
> 
> We already check whether No Command Completed Support bit is set in
> pcie_wait_cmd(), and do not wait in this case.
> 
> Let's not enable this Command Completed Interrupt at all if NCCS is set,
> so that when users dump configuration space from userspace, the dump
> does not confuse them by saying that Command Completed Interrupt is not
> supported, but it is enabled.
> 
> Signed-off-by: Pali Rohár <pali@kernel.org>
> Signed-off-by: Marek Behún <kabel@kernel.org>
> Reviewed-by: Lukas Wunner <lukas@wunner.de>

Since this isn't directly related to aardvark or the rest of the
series, I applied this to pci/hotplug for v6.2, thanks!

> ---
>  drivers/pci/hotplug/pciehp_hpc.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/pci/hotplug/pciehp_hpc.c b/drivers/pci/hotplug/pciehp_hpc.c
> index 040ae076ec0e..10e9670eea0b 100644
> --- a/drivers/pci/hotplug/pciehp_hpc.c
> +++ b/drivers/pci/hotplug/pciehp_hpc.c
> @@ -811,7 +811,9 @@ static void pcie_enable_notification(struct controller *ctrl)
>  	else
>  		cmd |= PCI_EXP_SLTCTL_PDCE;
>  	if (!pciehp_poll_mode)
> -		cmd |= PCI_EXP_SLTCTL_HPIE | PCI_EXP_SLTCTL_CCIE;
> +		cmd |= PCI_EXP_SLTCTL_HPIE;
> +	if (!pciehp_poll_mode && !NO_CMD_CMPL(ctrl))
> +		cmd |= PCI_EXP_SLTCTL_CCIE;
>  
>  	mask = (PCI_EXP_SLTCTL_PDCE | PCI_EXP_SLTCTL_ABPE |
>  		PCI_EXP_SLTCTL_PFDE |
> -- 
> 2.35.1
> 
> 
> _______________________________________________
> linux-arm-kernel mailing list
> linux-arm-kernel@lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

WARNING: multiple messages have this Message-ID (diff)
From: Bjorn Helgaas <helgaas@kernel.org>
To: "Marek Behún" <kabel@kernel.org>
Cc: "Lorenzo Pieralisi" <lorenzo.pieralisi@arm.com>,
	"Gregory CLEMENT" <gregory.clement@bootlin.com>,
	pali@kernel.org, "Krzysztof Wilczyński" <kw@linux.com>,
	linux-pci@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
	"Lukas Wunner" <lukas@wunner.de>
Subject: Re: [PATCH v2 01/10] PCI: pciehp: Enable Command Completed Interrupt only if supported
Date: Wed, 7 Dec 2022 08:29:35 -0600	[thread overview]
Message-ID: <20221207142935.GA1440263@bhelgaas> (raw)
In-Reply-To: <20220927141926.8895-2-kabel@kernel.org>

On Tue, Sep 27, 2022 at 04:19:17PM +0200, Marek Behún wrote:
> From: Pali Rohár <pali@kernel.org>
> 
> The No Command Completed Support bit in the Slot Capabilities register
> indicates whether Command Completed Interrupt Enable is unsupported.
> 
> We already check whether No Command Completed Support bit is set in
> pcie_wait_cmd(), and do not wait in this case.
> 
> Let's not enable this Command Completed Interrupt at all if NCCS is set,
> so that when users dump configuration space from userspace, the dump
> does not confuse them by saying that Command Completed Interrupt is not
> supported, but it is enabled.
> 
> Signed-off-by: Pali Rohár <pali@kernel.org>
> Signed-off-by: Marek Behún <kabel@kernel.org>
> Reviewed-by: Lukas Wunner <lukas@wunner.de>

Since this isn't directly related to aardvark or the rest of the
series, I applied this to pci/hotplug for v6.2, thanks!

> ---
>  drivers/pci/hotplug/pciehp_hpc.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/pci/hotplug/pciehp_hpc.c b/drivers/pci/hotplug/pciehp_hpc.c
> index 040ae076ec0e..10e9670eea0b 100644
> --- a/drivers/pci/hotplug/pciehp_hpc.c
> +++ b/drivers/pci/hotplug/pciehp_hpc.c
> @@ -811,7 +811,9 @@ static void pcie_enable_notification(struct controller *ctrl)
>  	else
>  		cmd |= PCI_EXP_SLTCTL_PDCE;
>  	if (!pciehp_poll_mode)
> -		cmd |= PCI_EXP_SLTCTL_HPIE | PCI_EXP_SLTCTL_CCIE;
> +		cmd |= PCI_EXP_SLTCTL_HPIE;
> +	if (!pciehp_poll_mode && !NO_CMD_CMPL(ctrl))
> +		cmd |= PCI_EXP_SLTCTL_CCIE;
>  
>  	mask = (PCI_EXP_SLTCTL_PDCE | PCI_EXP_SLTCTL_ABPE |
>  		PCI_EXP_SLTCTL_PFDE |
> -- 
> 2.35.1
> 
> 
> _______________________________________________
> linux-arm-kernel mailing list
> linux-arm-kernel@lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

  reply	other threads:[~2022-12-07 14:29 UTC|newest]

Thread overview: 26+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-09-27 14:19 [PATCH v2 00/10] PCI: aardvark controller changes BATCH 6 Marek Behún
2022-09-27 14:19 ` Marek Behún
2022-09-27 14:19 ` [PATCH v2 01/10] PCI: pciehp: Enable Command Completed Interrupt only if supported Marek Behún
2022-09-27 14:19   ` Marek Behún
2022-12-07 14:29   ` Bjorn Helgaas [this message]
2022-12-07 14:29     ` Bjorn Helgaas
2022-09-27 14:19 ` [PATCH v2 02/10] PCI: aardvark: Add support for DLLSC and hotplug interrupt Marek Behún
2022-09-27 14:19   ` Marek Behún
2022-09-27 14:19 ` [PATCH v2 03/10] PCI: aardvark: Send Set_Slot_Power_Limit message Marek Behún
2022-09-27 14:19   ` Marek Behún
2022-09-27 14:19 ` [PATCH v2 04/10] arm64: dts: armada-3720-turris-mox: Define slot-power-limit-milliwatt for PCIe Marek Behún
2022-09-27 14:19   ` Marek Behún
2022-11-27 23:36   ` Gregory CLEMENT
2022-11-27 23:36     ` Gregory CLEMENT
2022-09-27 14:19 ` [PATCH v2 05/10] PCI: aardvark: Add clock support Marek Behún
2022-09-27 14:19   ` Marek Behún
2022-09-27 14:19 ` [PATCH v2 06/10] PCI: aardvark: Add suspend to RAM support Marek Behún
2022-09-27 14:19   ` Marek Behún
2022-09-27 14:19 ` [PATCH v2 07/10] PCI: aardvark: Replace custom PCIE_CORE_ERR_CAPCTL_* macros by linux/pci_regs.h macros Marek Behún
2022-09-27 14:19   ` Marek Behún
2022-09-27 14:19 ` [PATCH v2 08/10] PCI: aardvark: Don't write read-only bits explicitly in PCI_ERR_CAP register Marek Behún
2022-09-27 14:19   ` Marek Behún
2022-09-27 14:19 ` [PATCH v2 09/10] PCI: aardvark: Explicitly disable Marvell strict ordering Marek Behún
2022-09-27 14:19   ` Marek Behún
2022-09-27 14:19 ` [PATCH v2 10/10] PCI: aardvark: Cleanup some register macros Marek Behún
2022-09-27 14:19   ` Marek Behún

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20221207142935.GA1440263@bhelgaas \
    --to=helgaas@kernel.org \
    --cc=gregory.clement@bootlin.com \
    --cc=kabel@kernel.org \
    --cc=kw@linux.com \
    --cc=linux-arm-kernel@lists.infradead.org \
    --cc=linux-pci@vger.kernel.org \
    --cc=lorenzo.pieralisi@arm.com \
    --cc=lukas@wunner.de \
    --cc=pali@kernel.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.