linux-kernel - [PATCH v10 2/4] PCI/DOE: Rename Discovery Response Data Object Contents to type

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Date: Wed, 22 May 2024 20:11:40 +1000
From: Alistair Francis <alistair23@...il.com>
To: bhelgaas@...gle.com,
	linux-pci@...r.kernel.org,
	Jonathan.Cameron@...wei.com,
	lukas@...ner.de
Cc: alex.williamson@...hat.com,
	christian.koenig@....com,
	kch@...dia.com,
	gregkh@...uxfoundation.org,
	logang@...tatee.com,
	linux-kernel@...r.kernel.org,
	alistair23@...il.com,
	chaitanyak@...dia.com,
	rdunlap@...radead.org,
	Alistair Francis <alistair.francis@....com>
Subject: [PATCH v10 2/4] PCI/DOE: Rename Discovery Response Data Object Contents to type

PCIe r6.1 (which was published July 24) describes a "Vendor ID", a
"Data Object Type" and "Next Index" as the fields in the DOE
Discovery Response Data Object. The DOE driver currently uses
both the terms type and prot for the second element.

This patch renames all uses of the DOE Discovery Response Data Object
to use type as the second element of the object header, instead of
type/prot as it currently is.

Signed-off-by: Alistair Francis <alistair.francis@....com>
---
v10:
 - Split original patch into two
v9:
 - Rename two more DOE macros
v8:
 - Rename prot to feat as well
v7:
 - Initial patch

 drivers/pci/doe.c             | 18 +++++++++---------
 include/uapi/linux/pci_regs.h |  2 +-
 2 files changed, 10 insertions(+), 10 deletions(-)

diff --git a/drivers/pci/doe.c b/drivers/pci/doe.c
index f776f5304a3e..defc4be81bd4 100644
--- a/drivers/pci/doe.c
+++ b/drivers/pci/doe.c
@@ -406,7 +406,7 @@ static int pci_doe_discovery(struct pci_doe_mb *doe_mb, u8 capver, u8 *index, u1
 
 	response_pl = le32_to_cpu(response_pl_le);
 	*vid = FIELD_GET(PCI_DOE_DATA_OBJECT_DISC_RSP_3_VID, response_pl);
-	*feature = FIELD_GET(PCI_DOE_DATA_OBJECT_DISC_RSP_3_PROTOCOL,
+	*feature = FIELD_GET(PCI_DOE_DATA_OBJECT_DISC_RSP_3_TYPE,
 			      response_pl);
 	*index = FIELD_GET(PCI_DOE_DATA_OBJECT_DISC_RSP_3_NEXT_INDEX,
 			   response_pl);
@@ -414,9 +414,9 @@ static int pci_doe_discovery(struct pci_doe_mb *doe_mb, u8 capver, u8 *index, u1
 	return 0;
 }
 
-static void *pci_doe_xa_feat_entry(u16 vid, u8 prot)
+static void *pci_doe_xa_feat_entry(u16 vid, u8 type)
 {
-	return xa_mk_value((vid << 8) | prot);
+	return xa_mk_value((vid << 8) | type);
 }
 
 static int pci_doe_cache_features(struct pci_doe_mb *doe_mb)
@@ -430,19 +430,19 @@ static int pci_doe_cache_features(struct pci_doe_mb *doe_mb)
 	do {
 		int rc;
 		u16 vid;
-		u8 prot;
+		u8 type;
 
 		rc = pci_doe_discovery(doe_mb, PCI_EXT_CAP_VER(hdr), &index,
-				       &vid, &prot);
+				       &vid, &type);
 		if (rc)
 			return rc;
 
 		pci_dbg(doe_mb->pdev,
-			"[%x] Found feature %d vid: %x prot: %x\n",
-			doe_mb->cap_offset, xa_idx, vid, prot);
+			"[%x] Found feature %d vid: %x type: %x\n",
+			doe_mb->cap_offset, xa_idx, vid, type);
 
 		rc = xa_insert(&doe_mb->feats, xa_idx++,
-			       pci_doe_xa_feat_entry(vid, prot), GFP_KERNEL);
+			       pci_doe_xa_feat_entry(vid, type), GFP_KERNEL);
 		if (rc)
 			return rc;
 	} while (index);
@@ -663,7 +663,7 @@ EXPORT_SYMBOL_GPL(pci_doe);
  *
  * @pdev: PCI device
  * @vendor: Vendor ID
- * @prot: Data Object Type
+ * @type: Data Object Type
  *
  * Find first DOE mailbox of a PCI device which supports the given feature.
  *
diff --git a/include/uapi/linux/pci_regs.h b/include/uapi/linux/pci_regs.h
index 94c00996e633..4fa1ec622177 100644
--- a/include/uapi/linux/pci_regs.h
+++ b/include/uapi/linux/pci_regs.h
@@ -1146,7 +1146,7 @@
 #define PCI_DOE_DATA_OBJECT_DISC_REQ_3_INDEX		0x000000ff
 #define PCI_DOE_DATA_OBJECT_DISC_REQ_3_VER		0x0000ff00
 #define PCI_DOE_DATA_OBJECT_DISC_RSP_3_VID		0x0000ffff
-#define PCI_DOE_DATA_OBJECT_DISC_RSP_3_PROTOCOL		0x00ff0000
+#define PCI_DOE_DATA_OBJECT_DISC_RSP_3_TYPE		0x00ff0000
 #define PCI_DOE_DATA_OBJECT_DISC_RSP_3_NEXT_INDEX	0xff000000
 
 /* Compute Express Link (CXL r3.1, sec 8.1.5) */
-- 
2.45.1