PCI: be more verbose about resource quirks

When reserving an PCI quirk, note that in the kernel bootup messages.

Also, parse the strange PIIX4 device resources - they should get their
own PCI resource quirks, but for now just print out what it finds to
verify that the code does the right thing.

Signed-off-by: Linus Torvalds <[e-mail]>

drivers/pci/quirks.c

···
 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_S3,	PCI_DEVICE_ID_S3_868,		quirk_s3_64M );
 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_S3,	PCI_DEVICE_ID_S3_968,		quirk_s3_64M );
 
-static void __devinit quirk_io_region(struct pci_dev *dev, unsigned region, unsigned size, int nr)
+static void __devinit quirk_io_region(struct pci_dev *dev, unsigned region,
+	unsigned size, int nr, const char *name)
 {
 	region &= ~(size-1);
 	if (region) {
···
 		pcibios_bus_to_resource(dev, res, &bus_region);
 
 		pci_claim_resource(dev, nr);
+		printk("PCI quirk: region %04x-%04x claimed by %s\n", region, region + size - 1, name);
 	}
 }	
 
···
 	u16 region;
 
 	pci_read_config_word(dev, 0xE0, &region);
-	quirk_io_region(dev, region, 64, PCI_BRIDGE_RESOURCES);
+	quirk_io_region(dev, region, 64, PCI_BRIDGE_RESOURCES, "ali7101 ACPI");
 	pci_read_config_word(dev, 0xE2, &region);
-	quirk_io_region(dev, region, 32, PCI_BRIDGE_RESOURCES+1);
+	quirk_io_region(dev, region, 32, PCI_BRIDGE_RESOURCES+1, "ali7101 SMB");
 }
 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AL,	PCI_DEVICE_ID_AL_M7101,		quirk_ali7101_acpi );
+
+static void piix4_io_quirk(struct pci_dev *dev, const char *name, unsigned int port, unsigned int enable)
+{
+	u32 devres;
+	u32 mask, size, base;
+
+	pci_read_config_dword(dev, port, &devres);
+	if ((devres & enable) != enable)
+		return;
+	mask = (devres >> 16) & 15;
+	base = devres & 0xffff;
+	size = 16;
+	for (;;) {
+		unsigned bit = size >> 1;
+		if ((bit & mask) == bit)
+			break;
+		size = bit;
+	}
+	/*
+	 * For now we only print it out. Eventually we'll want to
+	 * reserve it (at least if it's in the 0x1000+ range), but
+	 * let's get enough confirmation reports first. 
+	 */
+	base &= -size;
+	printk("%s PIO at %04x-%04x\n", name, base, base + size - 1);
+}
+
+static void piix4_mem_quirk(struct pci_dev *dev, const char *name, unsigned int port, unsigned int enable)
+{
+	u32 devres;
+	u32 mask, size, base;
+
+	pci_read_config_dword(dev, port, &devres);
+	if ((devres & enable) != enable)
+		return;
+	base = devres & 0xffff0000;
+	mask = (devres & 0x3f) << 16;
+	size = 128 << 16;
+	for (;;) {
+		unsigned bit = size >> 1;
+		if ((bit & mask) == bit)
+			break;
+		size = bit;
+	}
+	/*
+	 * For now we only print it out. Eventually we'll want to
+	 * reserve it, but let's get enough confirmation reports first. 
+	 */
+	base &= -size;
+	printk("%s MMIO at %04x-%04x\n", name, base, base + size - 1);
+}
 
 /*
  * PIIX4 ACPI: Two IO regions pointed to by longwords at
  *	0x40 (64 bytes of ACPI registers)
  *	0x90 (32 bytes of SMB registers)
+ * and a few strange programmable PIIX4 device resources.
  */
 static void __devinit quirk_piix4_acpi(struct pci_dev *dev)
 {
-	u32 region;
+	u32 region, res_a;
 
 	pci_read_config_dword(dev, 0x40, &region);
-	quirk_io_region(dev, region, 64, PCI_BRIDGE_RESOURCES);
+	quirk_io_region(dev, region, 64, PCI_BRIDGE_RESOURCES, "PIIX4 ACPI");
 	pci_read_config_dword(dev, 0x90, &region);
-	quirk_io_region(dev, region, 32, PCI_BRIDGE_RESOURCES+1);
+	quirk_io_region(dev, region, 32, PCI_BRIDGE_RESOURCES+1, "PIIX4 SMB");
+
+	/* Device resource A has enables for some of the other ones */
+	pci_read_config_dword(dev, 0x5c, &res_a);
+
+	piix4_io_quirk(dev, "PIIX4 devres B", 0x60, 3 << 21);
+	piix4_io_quirk(dev, "PIIX4 devres C", 0x64, 3 << 21);
+
+	/* Device resource D is just bitfields for static resources */
+
+	/* Device 12 enabled? */
+	if (res_a & (1 << 29)) {
+		piix4_io_quirk(dev, "PIIX4 devres E", 0x68, 1 << 20);
+		piix4_mem_quirk(dev, "PIIX4 devres F", 0x6c, 1 << 7);
+	}
+	/* Device 13 enabled? */
+	if (res_a & (1 << 30)) {
+		piix4_io_quirk(dev, "PIIX4 devres G", 0x70, 1 << 20);
+		piix4_mem_quirk(dev, "PIIX4 devres H", 0x74, 1 << 7);
+	}
+	piix4_io_quirk(dev, "PIIX4 devres I", 0x78, 1 << 20);
+	piix4_io_quirk(dev, "PIIX4 devres J", 0x7c, 1 << 20);
 }
 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_82371AB_3,	quirk_piix4_acpi );
 
···
 	u32 region;
 
 	pci_read_config_dword(dev, 0x40, &region);
-	quirk_io_region(dev, region, 128, PCI_BRIDGE_RESOURCES);
+	quirk_io_region(dev, region, 128, PCI_BRIDGE_RESOURCES, "ICH4 ACPI/GPIO/TCO");
 
 	pci_read_config_dword(dev, 0x58, &region);
-	quirk_io_region(dev, region, 64, PCI_BRIDGE_RESOURCES+1);
+	quirk_io_region(dev, region, 64, PCI_BRIDGE_RESOURCES+1, "ICH4 GPIO");
 }
 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL,    PCI_DEVICE_ID_INTEL_82801AA_0,		quirk_ich4_lpc_acpi );
 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL,    PCI_DEVICE_ID_INTEL_82801AB_0,		quirk_ich4_lpc_acpi );
···
 	if (rev & 0x10) {
 		pci_read_config_dword(dev, 0x48, &region);
 		region &= PCI_BASE_ADDRESS_IO_MASK;
-		quirk_io_region(dev, region, 256, PCI_BRIDGE_RESOURCES);
+		quirk_io_region(dev, region, 256, PCI_BRIDGE_RESOURCES, "vt82c586 ACPI");
 	}
 }
 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA,	PCI_DEVICE_ID_VIA_82C586_3,	quirk_vt82c586_acpi );
···
 
 	pci_read_config_word(dev, 0x70, &hm);
 	hm &= PCI_BASE_ADDRESS_IO_MASK;
-	quirk_io_region(dev, hm, 128, PCI_BRIDGE_RESOURCES + 1);
+	quirk_io_region(dev, hm, 128, PCI_BRIDGE_RESOURCES + 1, "vt82c868 HW-mon");
 
 	pci_read_config_dword(dev, 0x90, &smb);
 	smb &= PCI_BASE_ADDRESS_IO_MASK;
-	quirk_io_region(dev, smb, 16, PCI_BRIDGE_RESOURCES + 2);
+	quirk_io_region(dev, smb, 16, PCI_BRIDGE_RESOURCES + 2, "vt82c868 SMB");
 }
 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA,	PCI_DEVICE_ID_VIA_82C686_4,	quirk_vt82c686_acpi );
 
···
 
 	pci_read_config_word(dev, 0x88, &pm);
 	pm &= PCI_BASE_ADDRESS_IO_MASK;
-	quirk_io_region(dev, pm, 128, PCI_BRIDGE_RESOURCES);
+	quirk_io_region(dev, pm, 128, PCI_BRIDGE_RESOURCES, "vt8235 PM");
 
 	pci_read_config_word(dev, 0xd0, &smb);
 	smb &= PCI_BASE_ADDRESS_IO_MASK;
-	quirk_io_region(dev, smb, 16, PCI_BRIDGE_RESOURCES + 1);
+	quirk_io_region(dev, smb, 16, PCI_BRIDGE_RESOURCES + 1, "vt8235 SMB");
 }
 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA,	PCI_DEVICE_ID_VIA_8235,	quirk_vt8235_acpi);