[efi] Generalise snpnet_dev_info() to efi_device_info()

Signed-off-by: Michael Brown <mcb30@ipxe.org>

src/drivers/net/efi/snpnet.c

 #include <ipxe/efi/efi.h>
 #include <ipxe/efi/Protocol/SimpleNetwork.h>
 #include <ipxe/efi/efi_driver.h>
-#include <ipxe/efi/efi_pci.h>
 #include <ipxe/efi/efi_utils.h>
 #include "snpnet.h"
 
 	.poll = snpnet_poll,
 };
 
-/**
- * Get underlying PCI device information
- *
- * @v efidev		EFI device
- * @v dev		Generic device to fill in
- * @ret rc		Return status code
- */
-static int snpnet_pci_info ( struct efi_device *efidev, struct device *dev ) {
-	EFI_HANDLE device = efidev->device;
-	EFI_HANDLE pci_device;
-	struct pci_device pci;
-	int rc;
-
-	/* Find parent PCI device */
-	if ( ( rc = efi_locate_device ( device, &efi_pci_io_protocol_guid,
-					&pci_device ) ) != 0 ) {
-		DBGC ( device, "SNP %p %s is not a PCI device: %s\n",
-		       device, efi_handle_name ( device ), strerror ( rc ) );
-		return rc;
-	}
-
-	/* Get PCI device information */
-	if ( ( rc = efipci_info ( pci_device, &pci ) ) != 0 ) {
-		DBGC ( device, "SNP %p %s could not get PCI information: %s\n",
-		       device, efi_handle_name ( device ), strerror ( rc ) );
-		return rc;
-	}
-
-	/* Populate SNP device information */
-	memcpy ( &dev->desc, &pci.dev.desc, sizeof ( dev->desc ) );
-	snprintf ( dev->name, sizeof ( dev->name ), "SNP-%s", pci.dev.name );
-
-	return 0;
-}
-
-/**
- * Get underlying device information
- *
- * @v efidev		EFI device
- * @v dev		Generic device to fill in
- */
-static void snpnet_dev_info ( struct efi_device *efidev, struct device *dev ) {
-	EFI_HANDLE device = efidev->device;
-	int rc;
-
-	/* Try getting underlying PCI device information */
-	if ( ( rc = snpnet_pci_info ( efidev, dev ) ) == 0 )
-		return;
-
-	/* If we cannot get any underlying device information, fall
-	 * back to providing information about the EFI handle.
-	 */
-	DBGC ( device, "SNP %p %s could not get underlying device "
-	       "information\n", device, efi_handle_name ( device ) );
-	dev->desc.bus_type = BUS_TYPE_EFI;
-	snprintf ( dev->name, sizeof ( dev->name ), "SNP-%p", device );
-}
-
 /**
  * Attach driver to device
  *
 	efidev_set_drvdata ( efidev, netdev );
 
 	/* Populate underlying device information */
-	snpnet_dev_info ( efidev, &snp->dev );
+	efi_device_info ( device, "SNP", &snp->dev );
 	snp->dev.driver_name = "SNP";
 	snp->dev.parent = &efidev->dev;
 	list_add ( &snp->dev.siblings, &efidev->dev.children );

src/include/ipxe/efi/efi_utils.h

 #include <ipxe/efi/efi.h>
 #include <ipxe/efi/Protocol/DevicePath.h>
 
+struct device;
+
 extern EFI_DEVICE_PATH_PROTOCOL *
 efi_devpath_end ( EFI_DEVICE_PATH_PROTOCOL *path );
 extern int efi_locate_device ( EFI_HANDLE device, EFI_GUID *protocol,
 			       EFI_HANDLE *parent );
 extern int efi_child_add ( EFI_HANDLE parent, EFI_HANDLE child );
 extern void efi_child_del ( EFI_HANDLE parent, EFI_HANDLE child );
+extern void efi_device_info ( EFI_HANDLE device, const char *prefix,
+			      struct device *dev );
 
 #endif /* _IPXE_EFI_UTILS_H */

src/interface/efi/efi_utils.c

 
 FILE_LICENCE ( GPL2_OR_LATER );
 
+#include <stdio.h>
 #include <string.h>
 #include <errno.h>
 #include <ipxe/efi/efi.h>
+#include <ipxe/efi/efi_pci.h>
 #include <ipxe/efi/efi_utils.h>
 
 /** @file
 	DBGC2 ( parent, " %p %s\n",
 		child, efi_handle_name ( child ) );
 }
+
+/**
+ * Get underlying PCI device information
+ *
+ * @v device		EFI device handle
+ * @v prefix		Device name prefix
+ * @v dev		Generic device to fill in
+ * @ret rc		Return status code
+ */
+static int efi_pci_info ( EFI_HANDLE device, const char *prefix,
+			  struct device *dev ) {
+	EFI_HANDLE pci_device;
+	struct pci_device pci;
+	int rc;
+
+	/* Find parent PCI device */
+	if ( ( rc = efi_locate_device ( device, &efi_pci_io_protocol_guid,
+					&pci_device ) ) != 0 ) {
+		DBGC ( device, "EFIDEV %p %s is not a PCI device: %s\n",
+		       device, efi_handle_name ( device ), strerror ( rc ) );
+		return rc;
+	}
+
+	/* Get PCI device information */
+	if ( ( rc = efipci_info ( pci_device, &pci ) ) != 0 ) {
+		DBGC ( device, "EFIDEV %p %s could not get PCI information: "
+		       "%s\n", device, efi_handle_name ( device ),
+		       strerror ( rc ) );
+		return rc;
+	}
+
+	/* Populate device information */
+	memcpy ( &dev->desc, &pci.dev.desc, sizeof ( dev->desc ) );
+	snprintf ( dev->name, sizeof ( dev->name ), "%s-%s",
+		   prefix, pci.dev.name );
+
+	return 0;
+}
+
+/**
+ * Get underlying device information
+ *
+ * @v device		EFI device handle
+ * @v prefix		Device name prefix
+ * @v dev		Generic device to fill in
+ */
+void efi_device_info ( EFI_HANDLE device, const char *prefix,
+		       struct device *dev ) {
+	int rc;
+
+	/* Try getting underlying PCI device information */
+	if ( ( rc = efi_pci_info ( device, prefix, dev ) ) == 0 )
+		return;
+
+	/* If we cannot get any underlying device information, fall
+	 * back to providing information about the EFI handle.
+	 */
+	DBGC ( device, "EFIDEV %p %s could not get underlying device "
+	       "information\n", device, efi_handle_name ( device ) );
+	dev->desc.bus_type = BUS_TYPE_EFI;
+	snprintf ( dev->name, sizeof ( dev->name ), "%s-%p", prefix, device );
+}