linux-kernel - Re: [PATCH v6 4/5] PCI: Add PCIE_MSG_CODE_PME_TURN

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Date: Tue, 16 Apr 2024 12:02:42 -0500
From: Bjorn Helgaas <helgaas@...nel.org>
To: Frank Li <Frank.Li@....com>
Cc: Bjorn Helgaas <bhelgaas@...gle.com>, Jingoo Han <jingoohan1@...il.com>,
	Gustavo Pimentel <gustavo.pimentel@...opsys.com>,
	Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>,
	Lorenzo Pieralisi <lpieralisi@...nel.org>,
	Krzysztof Wilczyński <kw@...ux.com>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
	Conor Dooley <conor+dt@...nel.org>, imx@...ts.linux.dev,
	linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org,
	devicetree@...r.kernel.org
Subject: Re: [PATCH v6 4/5] PCI: Add PCIE_MSG_CODE_PME_TURN_OFF message macro

On Mon, Apr 15, 2024 at 03:33:28PM -0400, Frank Li wrote:
> Add PCIE_MSG_CODE_PME_TURN_OFF macros to enable a PCIe host driver to send
> PME_Turn_Off messages.
> 
> Signed-off-by: Frank Li <Frank.Li@....com>
> ---
>  drivers/pci/pci.h | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h
> index 19b4227a8a7e8..1f6d54a5a7cfc 100644
> --- a/drivers/pci/pci.h
> +++ b/drivers/pci/pci.h
> @@ -30,6 +30,8 @@
>  #define PCIE_MSG_TYPE_R_LOCAL	4
>  #define PCIE_MSG_TYPE_R_GATHER	5
>  
> +#define PCIE_MSG_CODE_PME_TURN_OFF	0x19

This is defined in PCIe r6.0, sec 2.2.8.2, so move this below the INTx
#defines so they're all in the order of the spec sections and add the
spec citation to follow the same style as the surrounding #defines,
i.e.,

  /* Power Management Messages; PCIe r6.0, sec 2.2.8.2 */
  #define PCIE_MSG_CODE_PME_TURN_OFF   0x19

While you're at it, tweak the [1/5] comments to be:

  /* Message Routing (r[2:0]); PCIe r6.0, sec 2.2.8 */
  /* INTx Mechanism Messages; PCIe r6.0, sec 2.2.8.1 */

since the "Message Routing See: PCIe ..." comments are run together
and need some punctuation between the text and the citation.

With these,

Acked-by: Bjorn Helgaas <bhelgaas@...gle.com>

>  /* INTx Mechanism Messages See: PCIe r6.0, sec 2.2.8.1 */
>  #define PCIE_MSG_CODE_ASSERT_INTA	0x20
>  #define PCIE_MSG_CODE_ASSERT_INTB	0x21
> 
> -- 
> 2.34.1
>