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Message-Id: <20211208015015.891275-2-david.e.box@linux.intel.com>
Date: Tue, 7 Dec 2021 17:50:10 -0800
From: "David E. Box" <david.e.box@...ux.intel.com>
To: lee.jones@...aro.org, hdegoede@...hat.com,
david.e.box@...ux.intel.com, bhelgaas@...gle.com,
gregkh@...uxfoundation.org, andriy.shevchenko@...ux.intel.com,
srinivas.pandruvada@...el.com, mgross@...ux.intel.com
Cc: linux-kernel@...r.kernel.org, platform-driver-x86@...r.kernel.org,
linux-pci@...r.kernel.org,
"Rafael J . Wysocki" <rafael.j.wysocki@...el.com>
Subject: [PATCH RESEND V2 1/6] PCI: Add #defines for accessing PCIe DVSEC fields
Add #defines for accessing Vendor ID, Revision, Length, and ID offsets
in the Designated Vendor Specific Extended Capability (DVSEC). Defined
in PCIe r5.0, sec 7.9.6.
Signed-off-by: David E. Box <david.e.box@...ux.intel.com>
Acked-by: Bjorn Helgaas <bhelgaas@...gle.com>
Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
---
V2
- No changes
include/uapi/linux/pci_regs.h | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/include/uapi/linux/pci_regs.h b/include/uapi/linux/pci_regs.h
index ff6ccbc6efe9..318f3f1f9e92 100644
--- a/include/uapi/linux/pci_regs.h
+++ b/include/uapi/linux/pci_regs.h
@@ -1086,7 +1086,11 @@
/* Designated Vendor-Specific (DVSEC, PCI_EXT_CAP_ID_DVSEC) */
#define PCI_DVSEC_HEADER1 0x4 /* Designated Vendor-Specific Header1 */
+#define PCI_DVSEC_HEADER1_VID(x) ((x) & 0xffff)
+#define PCI_DVSEC_HEADER1_REV(x) (((x) >> 16) & 0xf)
+#define PCI_DVSEC_HEADER1_LEN(x) (((x) >> 20) & 0xfff)
#define PCI_DVSEC_HEADER2 0x8 /* Designated Vendor-Specific Header2 */
+#define PCI_DVSEC_HEADER2_ID(x) ((x) & 0xffff)
/* Data Link Feature */
#define PCI_DLF_CAP 0x04 /* Capabilities Register */
--
2.25.1
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