[pci] Use single "busdevfn" field in struct pci_device

Merge the "bus" and "devfn" fields into a single "busdevfn" field, to
match the format used by the majority of external code.

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

1 files changed, 57 insertions, 60 deletions

diff --git a/src/drivers/bus/pci.c b/src/drivers/bus/pci.c
index 3ff544401..e92f11b2f 100644
--- a/src/drivers/bus/pci.c
+++ b/src/drivers/bus/pci.c
@@ -228,75 +228,72 @@ static void pci_remove ( struct pci_device *pci ) {
  */
 static int pcibus_probe ( struct root_device *rootdev ) {
 	struct pci_device *pci = NULL;
-	unsigned int max_bus;
-	unsigned int bus;
-	unsigned int devfn;
+	unsigned int num_bus;
+	unsigned int busdevfn;
 	uint8_t hdrtype = 0;
 	uint32_t tmp;
 	int rc;
 
-	max_bus = pci_max_bus();
-	for ( bus = 0 ; bus <= max_bus ; bus++ ) {
-		for ( devfn = 0 ; devfn <= 0xff ; devfn++ ) {
+	num_bus = ( pci_max_bus() + 1 );
+	for ( busdevfn = 0 ; busdevfn < PCI_BUSDEVFN ( num_bus, 0, 0 ) ;
+	      busdevfn++ ) {
 
-			/* Allocate struct pci_device */
-			if ( ! pci )
-				pci = malloc ( sizeof ( *pci ) );
-			if ( ! pci ) {
-				rc = -ENOMEM;
-				goto err;
-			}
-			memset ( pci, 0, sizeof ( *pci ) );
-			pci->bus = bus;
-			pci->devfn = devfn;
+		/* Allocate struct pci_device */
+		if ( ! pci )
+			pci = malloc ( sizeof ( *pci ) );
+		if ( ! pci ) {
+			rc = -ENOMEM;
+			goto err;
+		}
+		memset ( pci, 0, sizeof ( *pci ) );
+		pci->busdevfn = busdevfn;
 			
-			/* Skip all but the first function on
-			 * non-multifunction cards
-			 */
-			if ( PCI_FUNC ( devfn ) == 0 ) {
-				pci_read_config_byte ( pci, PCI_HEADER_TYPE,
-						       &hdrtype );
-			} else if ( ! ( hdrtype & 0x80 ) ) {
-					continue;
-			}
+		/* Skip all but the first function on
+		 * non-multifunction cards
+		 */
+		if ( PCI_FUNC ( busdevfn ) == 0 ) {
+			pci_read_config_byte ( pci, PCI_HEADER_TYPE,
+					       &hdrtype );
+		} else if ( ! ( hdrtype & 0x80 ) ) {
+			continue;
+		}
 
-			/* Check for physical device presence */
-			pci_read_config_dword ( pci, PCI_VENDOR_ID, &tmp );
-			if ( ( tmp == 0xffffffff ) || ( tmp == 0 ) )
-				continue;
+		/* Check for physical device presence */
+		pci_read_config_dword ( pci, PCI_VENDOR_ID, &tmp );
+		if ( ( tmp == 0xffffffff ) || ( tmp == 0 ) )
+			continue;
 			
-			/* Populate struct pci_device */
-			pci->vendor = ( tmp & 0xffff );
-			pci->device = ( tmp >> 16 );
-			pci_read_config_dword ( pci, PCI_REVISION, &tmp );
-			pci->class = ( tmp >> 8 );
-			pci_read_config_byte ( pci, PCI_INTERRUPT_LINE,
-					       &pci->irq );
-			pci_read_bases ( pci );
+		/* Populate struct pci_device */
+		pci->vendor = ( tmp & 0xffff );
+		pci->device = ( tmp >> 16 );
+		pci_read_config_dword ( pci, PCI_REVISION, &tmp );
+		pci->class = ( tmp >> 8 );
+		pci_read_config_byte ( pci, PCI_INTERRUPT_LINE,
+				       &pci->irq );
+		pci_read_bases ( pci );
 
-			/* Add to device hierarchy */
-			snprintf ( pci->dev.name, sizeof ( pci->dev.name ),
-				   "PCI%02x:%02x.%x", bus,
-				   PCI_SLOT ( devfn ), PCI_FUNC ( devfn ) );
-			pci->dev.desc.bus_type = BUS_TYPE_PCI;
-			pci->dev.desc.location = PCI_BUSDEVFN (bus, devfn);
-			pci->dev.desc.vendor = pci->vendor;
-			pci->dev.desc.device = pci->device;
-			pci->dev.desc.class = pci->class;
-			pci->dev.desc.ioaddr = pci->ioaddr;
-			pci->dev.desc.irq = pci->irq;
-			pci->dev.parent = &rootdev->dev;
-			list_add ( &pci->dev.siblings, &rootdev->dev.children);
-			INIT_LIST_HEAD ( &pci->dev.children );
-			
-			/* Look for a driver */
-			if ( pci_probe ( pci ) == 0 ) {
-				/* pcidev registered, we can drop our ref */
-				pci = NULL;
-			} else {
-				/* Not registered; re-use struct pci_device */
-				list_del ( &pci->dev.siblings );
-			}
+		/* Add to device hierarchy */
+		snprintf ( pci->dev.name, sizeof ( pci->dev.name ),
+			   "PCI%02x:%02x.%x", PCI_BUS ( busdevfn ),
+			   PCI_SLOT ( busdevfn ), PCI_FUNC ( busdevfn ) );
+		pci->dev.desc.bus_type = BUS_TYPE_PCI;
+		pci->dev.desc.location = pci->busdevfn;
+		pci->dev.desc.vendor = pci->vendor;
+		pci->dev.desc.device = pci->device;
+		pci->dev.desc.class = pci->class;
+		pci->dev.desc.ioaddr = pci->ioaddr;
+		pci->dev.desc.irq = pci->irq;
+		pci->dev.parent = &rootdev->dev;
+		list_add ( &pci->dev.siblings, &rootdev->dev.children);
+		INIT_LIST_HEAD ( &pci->dev.children );
+
+		/* Look for a driver */
+		if ( pci_probe ( pci ) == 0 ) {
+			/* pcidev registered, we can drop our ref */
+			pci = NULL;
+		} else {
+			/* Not registered; re-use struct pci_device */
+			list_del ( &pci->dev.siblings );
 		}
 	}