linux-kernel - Re: [PATCH v4 02/10] PCI/IDE: Enumerate Selective Stream IDE capabilities

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Message-ID: <20250807201236.GA60870@bhelgaas>
Date: Thu, 7 Aug 2025 15:12:36 -0500
From: Bjorn Helgaas <helgaas@...nel.org>
To: Dan Williams <dan.j.williams@...el.com>
Cc: linux-coco@...ts.linux.dev, linux-pci@...r.kernel.org,
	linux-kernel@...r.kernel.org, bhelgaas@...gle.com, aik@....com,
	lukas@...ner.de, Yilun Xu <yilun.xu@...el.com>,
	Jonathan Cameron <Jonathan.Cameron@...wei.com>,
	"Aneesh Kumar K.V" <aneesh.kumar@...nel.org>
Subject: Re: [PATCH v4 02/10] PCI/IDE: Enumerate Selective Stream IDE
 capabilities

On Thu, Jul 17, 2025 at 11:33:50AM -0700, Dan Williams wrote:
> Link encryption is a new PCIe feature enumerated by "PCIe 6.2 section
> 7.9.26 IDE Extended Capability".

> +++ b/drivers/pci/ide.c
> @@ -0,0 +1,93 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/* Copyright(c) 2024 Intel Corporation. All rights reserved. */
> +
> +/* PCIe 6.2 section 6.33 Integrity & Data Encryption (IDE) */
> +
> +#define dev_fmt(fmt) "PCI/IDE: " fmt
> +#include <linux/pci.h>
> +#include <linux/bitfield.h>

Trend is to alphabetize these.  And I think there should be more
#includes here instead of using other things pulled in indirectly:

  https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/process/submit-checklist.rst?id=v6.16#n17

> +++ b/include/uapi/linux/pci_regs.h

> +#define  PCI_IDE_CAP_ALG_MASK		__GENMASK(12, 8) /* Supported Algorithms */
> +#define  PCI_IDE_CAP_ALG_AES_GCM_256	0    /* AES-GCM 256 key size, 96b MAC */
> +#define  PCI_IDE_CAP_LINK_TC_NUM_MASK	__GENMASK(15, 13) /* Link IDE TCs */
> +#define  PCI_IDE_CAP_SEL_NUM_MASK	__GENMASK(23, 16)/* Supported Selective IDE Streams */

I'm totally OK with dropping the "_MASK" suffix since I think uses are
completely readable without it, especially with __GENMASK()/FIELD_GET()/
FIELD_PREP().