microblaze/PCI: Remove pcibios_setup_bus_{self/devices} dead code

01cf9d52 ("microblaze/PCI: Support generic Xilinx AXI PCIe Host Bridge
IP driver") removed pcibios calls to:

  pcibios_setup_bus_self()
  pcibios_setup_bus_devices()

Given that pcibios_fixup_bus() was the only caller of those functions they
have now become dead code (along with the functions they were calling in
turn), so they can be removed.
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
[bhelgaas: remove "Fixup resources of a PCI<->PCI bridge" comment]
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Michal Simek <michal.simek@xilinx.com>
Cc: Bharat Kumar Gogada <bharatku@xilinx.com>
Cc: Ravi Kiran Gummaluri <rgummal@xilinx.com>

arch/microblaze/include/asm/pci.h

@@ -81,9 +81,6 @@ extern pgprot_t	pci_phys_mem_access_prot(struct file *file,
 
 #define HAVE_ARCH_PCI_RESOURCE_TO_USER
 
-extern void pcibios_setup_bus_devices(struct pci_bus *bus);
-extern void pcibios_setup_bus_self(struct pci_bus *bus);
-
 /* This part of code was originally in xilinx-pci.h */
 #ifdef CONFIG_PCI_XILINX
 extern void __init xilinx_pci_init(void);

arch/microblaze/pci/pci-common.c

@@ -678,138 +678,6 @@ static void pcibios_fixup_resources(struct pci_dev *dev)
 }
 DECLARE_PCI_FIXUP_HEADER(PCI_ANY_ID, PCI_ANY_ID, pcibios_fixup_resources);
 
-/* This function tries to figure out if a bridge resource has been initialized
- * by the firmware or not. It doesn't have to be absolutely bullet proof, but
- * things go more smoothly when it gets it right. It should covers cases such
- * as Apple "closed" bridge resources and bare-metal pSeries unassigned bridges
- */
-static int pcibios_uninitialized_bridge_resource(struct pci_bus *bus,
-						 struct resource *res)
-{
-	struct pci_controller *hose = pci_bus_to_host(bus);
-	struct pci_dev *dev = bus->self;
-	resource_size_t offset;
-	u16 command;
-	int i;
-
-	/* Job is a bit different between memory and IO */
-	if (res->flags & IORESOURCE_MEM) {
-		/* If the BAR is non-0 (res != pci_mem_offset) then it's
-		 * probably been initialized by somebody
-		 */
-		if (res->start != hose->pci_mem_offset)
-			return 0;
-
-		/* The BAR is 0, let's check if memory decoding is enabled on
-		 * the bridge. If not, we consider it unassigned
-		 */
-		pci_read_config_word(dev, PCI_COMMAND, &command);
-		if ((command & PCI_COMMAND_MEMORY) == 0)
-			return 1;
-
-		/* Memory decoding is enabled and the BAR is 0. If any of
-		 * the bridge resources covers that starting address (0 then
-		 * it's good enough for us for memory
-		 */
-		for (i = 0; i < 3; i++) {
-			if ((hose->mem_resources[i].flags & IORESOURCE_MEM) &&
-			   hose->mem_resources[i].start == hose->pci_mem_offset)
-				return 0;
-		}
-
-		/* Well, it starts at 0 and we know it will collide so we may as
-		 * well consider it as unassigned. That covers the Apple case.
-		 */
-		return 1;
-	} else {
-		/* If the BAR is non-0, then we consider it assigned */
-		offset = (unsigned long)hose->io_base_virt - _IO_BASE;
-		if (((res->start - offset) & 0xfffffffful) != 0)
-			return 0;
-
-		/* Here, we are a bit different than memory as typically IO
-		 * space starting at low addresses -is- valid. What we do
-		 * instead if that we consider as unassigned anything that
-		 * doesn't have IO enabled in the PCI command register,
-		 * and that's it.
-		 */
-		pci_read_config_word(dev, PCI_COMMAND, &command);
-		if (command & PCI_COMMAND_IO)
-			return 0;
-
-		/* It's starting at 0 and IO is disabled in the bridge, consider
-		 * it unassigned
-		 */
-		return 1;
-	}
-}
-
-/* Fixup resources of a PCI<->PCI bridge */
-static void pcibios_fixup_bridge(struct pci_bus *bus)
-{
-	struct resource *res;
-	int i;
-
-	struct pci_dev *dev = bus->self;
-
-	pci_bus_for_each_resource(bus, res, i) {
-		if (!res)
-			continue;
-		if (!res->flags)
-			continue;
-		if (i >= 3 && bus->self->transparent)
-			continue;
-
-		pr_debug("PCI:%s Bus rsrc %d %016llx-%016llx [%x] fixup...\n",
-			 pci_name(dev), i,
-			 (unsigned long long)res->start,
-			 (unsigned long long)res->end,
-			 (unsigned int)res->flags);
-
-		/* Try to detect uninitialized P2P bridge resources,
-		 * and clear them out so they get re-assigned later
-		 */
-		if (pcibios_uninitialized_bridge_resource(bus, res)) {
-			res->flags = 0;
-			pr_debug("PCI:%s            (unassigned)\n",
-								pci_name(dev));
-		} else {
-			pr_debug("PCI:%s            %016llx-%016llx\n",
-				 pci_name(dev),
-				 (unsigned long long)res->start,
-				 (unsigned long long)res->end);
-		}
-	}
-}
-
-void pcibios_setup_bus_self(struct pci_bus *bus)
-{
-	/* Fix up the bus resources for P2P bridges */
-	if (bus->self != NULL)
-		pcibios_fixup_bridge(bus);
-}
-
-void pcibios_setup_bus_devices(struct pci_bus *bus)
-{
-	struct pci_dev *dev;
-
-	pr_debug("PCI: Fixup bus devices %d (%s)\n",
-		 bus->number, bus->self ? pci_name(bus->self) : "PHB");
-
-	list_for_each_entry(dev, &bus->devices, bus_list) {
-		/* Setup OF node pointer in archdata */
-		dev->dev.of_node = pci_device_to_OF_node(dev);
-
-		/* Fixup NUMA node as it may not be setup yet by the generic
-		 * code and is needed by the DMA init
-		 */
-		set_dev_node(&dev->dev, pcibus_to_node(dev->bus));
-
-		/* Read default IRQs and fixup if necessary */
-		dev->irq = of_irq_parse_and_map_pci(dev, 0, 0);
-	}
-}
-
 /*
  * We need to avoid collisions with `mirrored' VGA ports
  * and other strange ISA hardware, so we always want the