add PCI ROMs to sysfs

diff -Nru a/arch/i386/pci/fixup.c b/arch/i386/pci/fixup.c
@@ -255,3 +255,41 @@
 }
 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE2, pci_fixup_nforce2);
 
+/*
+ * Fixup to mark boot BIOS video selected by BIOS before it changes
+ *
+ * From information provided by "Jon Smirl" <[email protected]>
+ *
+ * The standard boot ROM sequence for an x86 machine uses the BIOS
+ * to select an initial video card for boot display. This boot video 
+ * card will have it's BIOS copied to C0000 in system RAM. 
+ * IORESOURCE_ROM_SHADOW is used to associate the boot video
+ * card with this copy. On laptops this copy has to be used since
+ * the main ROM may be compressed or combined with another image.
+ * See pci_map_rom() for use of this flag. IORESOURCE_ROM_SHADOW
+ * is marked here since the boot video device will be the only enabled
+ * video device at this point.
+ *
+ */static void __devinit pci_fixup_video(struct pci_dev *pdev)
+{
+	struct pci_dev *bridge;
+	struct pci_bus *bus;
+	u16 l;
+
+	if ((pdev->class >> 8) != PCI_CLASS_DISPLAY_VGA)
+		return;
+
+	/* Is VGA routed to us? */
+	bus = pdev->bus;
+	while (bus) {
+		bridge = bus->self;
+		if (bridge) {
+			pci_read_config_word(bridge, PCI_BRIDGE_CONTROL, &l);
+			if (!(l & PCI_BRIDGE_CTL_VGA))
+				return;
+		}
+		bus = bus->parent;
+	}
+	pdev->resource[PCI_ROM_RESOURCE].flags |= IORESOURCE_ROM_SHADOW;
+}
+DECLARE_PCI_FIXUP_HEADER(PCI_ANY_ID, PCI_ANY_ID, pci_fixup_video);

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diff -Nru a/drivers/pci/pci.h b/drivers/pci/pci.h
@@ -2,7 +2,9 @@
 
 extern int pci_hotplug (struct device *dev, char **envp, int num_envp,
 			 char *buffer, int buffer_size);
-extern void pci_create_sysfs_dev_files(struct pci_dev *pdev);
+extern int pci_create_sysfs_dev_files(struct pci_dev *pdev);
+extern void pci_remove_sysfs_dev_files(struct pci_dev *pdev);
+extern void pci_cleanup_rom(struct pci_dev *dev);
 extern int pci_bus_alloc_resource(struct pci_bus *bus, struct resource *res,
 				  unsigned long size, unsigned long align,
 				  unsigned long min, unsigned int type_mask,

diff -Nru a/drivers/pci/probe.c b/drivers/pci/probe.c
@@ -170,7 +170,7 @@
 		if (sz && sz != 0xffffffff) {
 			sz = pci_size(l, sz, PCI_ROM_ADDRESS_MASK);
 			if (sz) {
-				res->flags = (l & PCI_ROM_ADDRESS_ENABLE) |
+				res->flags = (l & IORESOURCE_ROM_ENABLE) |
 				  IORESOURCE_MEM | IORESOURCE_PREFETCH |
 				  IORESOURCE_READONLY | IORESOURCE_CACHEABLE;
 				res->start = l & PCI_ROM_ADDRESS_MASK;

diff -Nru a/drivers/pci/remove.c b/drivers/pci/remove.c
@@ -16,6 +16,7 @@
 
  	msi_remove_pci_irq_vectors(dev);
 
+	pci_cleanup_rom(dev);
 	for (i = 0; i < PCI_NUM_RESOURCES; i++) {
 		struct resource *res = dev->resource + i;
 		if (res->parent)

@@ -26,6 +27,7 @@
 static void pci_destroy_dev(struct pci_dev *dev)
 {
 	pci_proc_detach_device(dev);
+	pci_remove_sysfs_dev_files(dev);
 	device_unregister(&dev->dev);
 
 	/* Remove the device from the device lists, and prevent any further

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diff -Nru a/drivers/pci/setup-res.c b/drivers/pci/setup-res.c
@@ -56,7 +56,7 @@
 	if (resno < 6) {
 		reg = PCI_BASE_ADDRESS_0 + 4 * resno;
 	} else if (resno == PCI_ROM_RESOURCE) {
-		new |= res->flags & PCI_ROM_ADDRESS_ENABLE;
+		new |= res->flags & IORESOURCE_ROM_ENABLE;
 		reg = dev->rom_base_reg;
 	} else {
 		/* Hmm, non-standard resource. */

diff -Nru a/include/linux/ioport.h b/include/linux/ioport.h
@@ -82,6 +82,11 @@
 #define IORESOURCE_MEM_SHADOWABLE	(1<<5)	/* dup: IORESOURCE_SHADOWABLE */
 #define IORESOURCE_MEM_EXPANSIONROM	(1<<6)
 
+/* PCI ROM control bits (IORESOURCE_BITS) */
+#define IORESOURCE_ROM_ENABLE		(1<<0)	/* ROM is enabled, same as PCI_ROM_ADDRESS_ENABLE */
+#define IORESOURCE_ROM_SHADOW		(1<<1)	/* ROM is copy at C000:0 */
+#define IORESOURCE_ROM_COPY		(1<<2)	/* ROM is alloc'd copy, resource field overlaid */
+
 /* PC/ISA/whatever - the normal PC address spaces: IO and memory */
 extern struct resource ioport_resource;
 extern struct resource iomem_resource;

diff -Nru a/include/linux/pci.h b/include/linux/pci.h
@@ -537,6 +537,7 @@
 	unsigned int	is_busmaster:1; /* device is busmaster */
 	
 	u32		saved_config_space[16]; /* config space saved at suspend time */
+	struct bin_attribute *rom_attr; /* attribute descriptor for sysfs ROM entry */
 #ifdef CONFIG_PCI_NAMES
 #define PCI_NAME_SIZE	96
 #define PCI_NAME_HALF	__stringify(43)	/* less than half to handle slop */

@@ -777,6 +778,12 @@
 int pci_dac_set_dma_mask(struct pci_dev *dev, u64 mask);
 int pci_set_consistent_dma_mask(struct pci_dev *dev, u64 mask);
 int pci_assign_resource(struct pci_dev *dev, int i);
+
+/* ROM control related routines */
+unsigned char *pci_map_rom(struct pci_dev *pdev, size_t *size);
+unsigned char *pci_map_rom_copy(struct pci_dev *pdev, size_t *size);
+void pci_unmap_rom(struct pci_dev *pdev, unsigned char *rom);
+void pci_remove_rom(struct pci_dev *pdev);
 
 /* Power management related routines */
 int pci_save_state(struct pci_dev *dev, u32 *buffer);