Merge branch 'master' into openslx

4 files changed, 22 insertions, 6 deletions

diff --git a/src/drivers/bus/eisa.c b/src/drivers/bus/eisa.c
index a4efe2621..68837eb4d 100644
--- a/src/drivers/bus/eisa.c
+++ b/src/drivers/bus/eisa.c
@@ -98,8 +98,16 @@ static void eisa_remove ( struct eisa_device *eisa ) {
 static int eisabus_probe ( struct root_device *rootdev ) {
 	struct eisa_device *eisa = NULL;
 	unsigned int slot;
+	uint8_t system;
 	int rc;
 
+	/* Check for EISA system board */
+	system = inb ( EISA_VENDOR_ID );
+	if ( system & 0x80 ) {
+		DBG ( "No EISA system board (read %02x)\n", system );
+		return -ENODEV;
+	}
+
 	for ( slot = EISA_MIN_SLOT ; slot <= EISA_MAX_SLOT ; slot++ ) {
 		/* Allocate struct eisa_device */
 		if ( ! eisa )
diff --git a/src/drivers/bus/pci.c b/src/drivers/bus/pci.c
index 7953aaedd..92b389641 100644
--- a/src/drivers/bus/pci.c
+++ b/src/drivers/bus/pci.c
@@ -205,6 +205,7 @@ int pci_read_config ( struct pci_device *pci ) {
 	pci_read_config_dword ( pci, PCI_REVISION, &tmp );
 	pci->class = ( tmp >> 8 );
 	pci_read_config_byte ( pci, PCI_INTERRUPT_LINE, &pci->irq );
+	pci_read_config_byte ( pci, PCI_HEADER_TYPE, &pci->hdrtype );
 	pci_read_bases ( pci );
 
 	/* Initialise generic device component */
diff --git a/src/drivers/bus/pcibackup.c b/src/drivers/bus/pcibackup.c
index fecad8192..4cf126f83 100644
--- a/src/drivers/bus/pcibackup.c
+++ b/src/drivers/bus/pcibackup.c
@@ -61,14 +61,15 @@ pci_backup_excluded ( struct pci_device *pci, unsigned int offset,
  *
  * @v pci		PCI device
  * @v backup		PCI configuration space backup
+ * @v limit		Maximum offset in PCI configuration space
  * @v exclude		PCI configuration space backup exclusion list, or NULL
  */
 void pci_backup ( struct pci_device *pci, struct pci_config_backup *backup,
-		  const uint8_t *exclude ) {
+		  unsigned int limit, const uint8_t *exclude ) {
 	unsigned int offset;
 	uint32_t *dword;
 
-	for ( offset = 0, dword = backup->dwords ; offset < 0x100 ;
+	for ( offset = 0, dword = backup->dwords ; offset < limit ;
 	      offset += sizeof ( *dword ) , dword++ ) {
 		if ( ! pci_backup_excluded ( pci, offset, exclude ) )
 			pci_read_config_dword ( pci, offset, dword );
@@ -80,14 +81,15 @@ void pci_backup ( struct pci_device *pci, struct pci_config_backup *backup,
  *
  * @v pci		PCI device
  * @v backup		PCI configuration space backup
+ * @v limit		Maximum offset in PCI configuration space
  * @v exclude		PCI configuration space backup exclusion list, or NULL
  */
 void pci_restore ( struct pci_device *pci, struct pci_config_backup *backup,
-		   const uint8_t *exclude ) {
+		   unsigned int limit, const uint8_t *exclude ) {
 	unsigned int offset;
 	uint32_t *dword;
 
-	for ( offset = 0, dword = backup->dwords ; offset < 0x100 ;
+	for ( offset = 0, dword = backup->dwords ; offset < limit ;
 	      offset += sizeof ( *dword ) , dword++ ) {
 		if ( ! pci_backup_excluded ( pci, offset, exclude ) )
 			pci_write_config_dword ( pci, offset, *dword );
diff --git a/src/drivers/bus/pciextra.c b/src/drivers/bus/pciextra.c
index 23617bc9a..1eeb9b2a0 100644
--- a/src/drivers/bus/pciextra.c
+++ b/src/drivers/bus/pciextra.c
@@ -3,6 +3,7 @@ FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 #include <stdint.h>
 #include <ipxe/timer.h>
 #include <ipxe/pci.h>
+#include <ipxe/pcibackup.h>
 
 static int pci_find_capability_common ( struct pci_device *pci,
 					uint8_t pos, int cap ) {
@@ -121,8 +122,12 @@ unsigned long pci_bar_size ( struct pci_device *pci, unsigned int reg ) {
  * @v exp		PCI Express Capability address
  */
 void pci_reset ( struct pci_device *pci, unsigned int exp ) {
+	struct pci_config_backup backup;
 	uint16_t control;
 
+	/* Back up configuration space */
+	pci_backup ( pci, &backup, PCI_CONFIG_BACKUP_STANDARD, NULL );
+
 	/* Perform a PCIe function-level reset */
 	pci_read_config_word ( pci, ( exp + PCI_EXP_DEVCTL ), &control );
 	control |= PCI_EXP_DEVCTL_FLR;
@@ -131,6 +136,6 @@ void pci_reset ( struct pci_device *pci, unsigned int exp ) {
 	/* Allow time for reset to complete */
 	mdelay ( PCI_EXP_FLR_DELAY_MS );
 
-	/* Re-enable device */
-	adjust_pci_device ( pci );
+	/* Restore configuration */
+	pci_restore ( pci, &backup, PCI_CONFIG_BACKUP_STANDARD, NULL );
 }