[PATCH v2 8/9] ocxl: Use pci core's DVSEC functionality

Ben Widawsky ben.widawsky at intel.com
Fri Sep 24 03:26:46 AEST 2021


Reduce maintenance burden of DVSEC query implementation by using the
centralized PCI core implementation.

There are two obvious places to simply drop in the new core
implementation. There remains find_dvsec_from_pos() which would benefit
from using a core implementation. As that change is less trivial it is
reserved for later.

Cc: linuxppc-dev at lists.ozlabs.org
Cc: Andrew Donnellan <ajd at linux.ibm.com>
Acked-by: Frederic Barrat <fbarrat at linux.ibm.com> (v1)
Signed-off-by: Ben Widawsky <ben.widawsky at intel.com>
---
 arch/powerpc/platforms/powernv/ocxl.c |  3 ++-
 drivers/misc/ocxl/config.c            | 13 +------------
 2 files changed, 3 insertions(+), 13 deletions(-)

diff --git a/arch/powerpc/platforms/powernv/ocxl.c b/arch/powerpc/platforms/powernv/ocxl.c
index 9105efcf242a..28b009b46464 100644
--- a/arch/powerpc/platforms/powernv/ocxl.c
+++ b/arch/powerpc/platforms/powernv/ocxl.c
@@ -107,7 +107,8 @@ static int get_max_afu_index(struct pci_dev *dev, int *afu_idx)
 	int pos;
 	u32 val;
 
-	pos = find_dvsec_from_pos(dev, OCXL_DVSEC_FUNC_ID, 0);
+	pos = pci_find_dvsec_capability(dev, PCI_VENDOR_ID_IBM,
+					OCXL_DVSEC_FUNC_ID);
 	if (!pos)
 		return -ESRCH;
 
diff --git a/drivers/misc/ocxl/config.c b/drivers/misc/ocxl/config.c
index a68738f38252..e401a51596b9 100644
--- a/drivers/misc/ocxl/config.c
+++ b/drivers/misc/ocxl/config.c
@@ -33,18 +33,7 @@
 
 static int find_dvsec(struct pci_dev *dev, int dvsec_id)
 {
-	int vsec = 0;
-	u16 vendor, id;
-
-	while ((vsec = pci_find_next_ext_capability(dev, vsec,
-						    OCXL_EXT_CAP_ID_DVSEC))) {
-		pci_read_config_word(dev, vsec + OCXL_DVSEC_VENDOR_OFFSET,
-				&vendor);
-		pci_read_config_word(dev, vsec + OCXL_DVSEC_ID_OFFSET, &id);
-		if (vendor == PCI_VENDOR_ID_IBM && id == dvsec_id)
-			return vsec;
-	}
-	return 0;
+	return pci_find_dvsec_capability(dev, PCI_VENDOR_ID_IBM, dvsec_id);
 }
 
 static int find_dvsec_afu_ctrl(struct pci_dev *dev, u8 afu_idx)
-- 
2.33.0



More information about the Linuxppc-dev mailing list