1 files changed, 140 insertions, 181 deletions

diff --git a/arch/sh/drivers/pci/pci.c b/arch/sh/drivers/pci/pci.c
index c481df63902..1bc09ee7948 100644
--- a/arch/sh/drivers/pci/pci.c
+++ b/arch/sh/drivers/pci/pci.c
@@ -19,6 +19,8 @@
 #include <linux/dma-debug.h>
 #include <linux/io.h>
 #include <linux/mutex.h>
+#include <linux/spinlock.h>
+#include <linux/export.h>
 
 unsigned long PCIBIOS_MIN_IO = 0x0000;
 unsigned long PCIBIOS_MIN_MEM = 0;
@@ -30,37 +32,76 @@ static struct pci_channel *hose_head, **hose_tail = &hose_head;
 
 static int pci_initialized;
 
-static void __devinit pcibios_scanbus(struct pci_channel *hose)
+static void pcibios_scanbus(struct pci_channel *hose)
 {
 	static int next_busno;
+	static int need_domain_info;
+	LIST_HEAD(resources);
+	struct resource *res;
+	resource_size_t offset;
+	int i;
 	struct pci_bus *bus;
 
-	bus = pci_scan_bus(next_busno, hose->pci_ops, hose);
+	for (i = 0; i < hose->nr_resources; i++) {
+		res = hose->resources + i;
+		offset = 0;
+		if (res->flags & IORESOURCE_IO)
+			offset = hose->io_offset;
+		else if (res->flags & IORESOURCE_MEM)
+			offset = hose->mem_offset;
+		pci_add_resource_offset(&resources, res, offset);
+	}
+
+	bus = pci_scan_root_bus(NULL, next_busno, hose->pci_ops, hose,
+				&resources);
+	hose->bus = bus;
+
+	need_domain_info = need_domain_info || hose->index;
+	hose->need_domain_info = need_domain_info;
 	if (bus) {
-		next_busno = bus->subordinate + 1;
+		next_busno = bus->busn_res.end + 1;
 		/* Don't allow 8-bit bus number overflow inside the hose -
 		   reserve some space for bridges. */
-		if (next_busno > 224)
+		if (next_busno > 224) {
 			next_busno = 0;
+			need_domain_info = 1;
+		}
 
 		pci_bus_size_bridges(bus);
 		pci_bus_assign_resources(bus);
-		pci_enable_bridges(bus);
+	} else {
+		pci_free_resource_list(&resources);
 	}
 }
 
+/*
+ * This interrupt-safe spinlock protects all accesses to PCI
+ * configuration space.
+ */
+DEFINE_RAW_SPINLOCK(pci_config_lock);
 static DEFINE_MUTEX(pci_scan_mutex);
 
-void __devinit register_pci_controller(struct pci_channel *hose)
+int register_pci_controller(struct pci_channel *hose)
 {
-	request_resource(&iomem_resource, hose->mem_resource);
-	request_resource(&ioport_resource, hose->io_resource);
+	int i;
+
+	for (i = 0; i < hose->nr_resources; i++) {
+		struct resource *res = hose->resources + i;
+
+		if (res->flags & IORESOURCE_IO) {
+			if (request_resource(&ioport_resource, res) < 0)
+				goto out;
+		} else {
+			if (request_resource(&iomem_resource, res) < 0)
+				goto out;
+		}
+	}
 
 	*hose_tail = hose;
 	hose_tail = &hose->next;
 
 	/*
-	 * Do not panic here but later - this might hapen before console init.
+	 * Do not panic here but later - this might happen before console init.
 	 */
 	if (!hose->io_map_base) {
 		printk(KERN_WARNING
@@ -68,6 +109,11 @@ void __devinit register_pci_controller(struct pci_channel *hose)
 	}
 
 	/*
+	 * Setup the ERR/PERR and SERR timers, if available.
+	 */
+	pcibios_enable_timers(hose);
+
+	/*
 	 * Scan the bus if it is register after the PCI subsystem
 	 * initialization.
 	 */
@@ -76,6 +122,15 @@ void __devinit register_pci_controller(struct pci_channel *hose)
 		pcibios_scanbus(hose);
 		mutex_unlock(&pci_scan_mutex);
 	}
+
+	return 0;
+
+out:
+	for (--i; i >= 0; i--)
+		release_resource(&hose->resources[i]);
+
+	printk(KERN_WARNING "Skipping PCI bus scan due to resource conflict\n");
+	return -1;
 }
 
 static int __init pcibios_init(void)
@@ -96,50 +151,12 @@ static int __init pcibios_init(void)
 }
 subsys_initcall(pcibios_init);
 
-static void pcibios_fixup_device_resources(struct pci_dev *dev,
-	struct pci_bus *bus)
-{
-	/* Update device resources.  */
-	struct pci_channel *hose = bus->sysdata;
-	unsigned long offset = 0;
-	int i;
-
-	for (i = 0; i < PCI_NUM_RESOURCES; i++) {
-		if (!dev->resource[i].start)
-			continue;
-		if (dev->resource[i].flags & IORESOURCE_PCI_FIXED)
-			continue;
-		if (dev->resource[i].flags & IORESOURCE_IO)
-			offset = hose->io_offset;
-		else if (dev->resource[i].flags & IORESOURCE_MEM)
-			offset = hose->mem_offset;
-
-		dev->resource[i].start += offset;
-		dev->resource[i].end += offset;
-	}
-}
-
 /*
  *  Called after each bus is probed, but before its children
  *  are examined.
  */
-void __devinit pcibios_fixup_bus(struct pci_bus *bus)
+void pcibios_fixup_bus(struct pci_bus *bus)
 {
-	struct pci_dev *dev = bus->self;
-	struct list_head *ln;
-	struct pci_channel *chan = bus->sysdata;
-
-	if (!dev) {
-		bus->resource[0] = chan->io_resource;
-		bus->resource[1] = chan->mem_resource;
-	}
-
-	for (ln = bus->devices.next; ln != &bus->devices; ln = ln->next) {
-		dev = pci_dev_b(ln);
-
-		if ((dev->class >> 8) != PCI_CLASS_BRIDGE_PCI)
-			pcibios_fixup_device_resources(dev, bus);
-	}
 }
 
 /*
@@ -148,130 +165,105 @@ void __devinit pcibios_fixup_bus(struct pci_bus *bus)
  * addresses to be allocated in the 0x000-0x0ff region
  * modulo 0x400.
  */
-void pcibios_align_resource(void *data, struct resource *res,
-			    resource_size_t size, resource_size_t align)
+resource_size_t pcibios_align_resource(void *data, const struct resource *res,
+				resource_size_t size, resource_size_t align)
 {
 	struct pci_dev *dev = data;
-	struct pci_channel *chan = dev->sysdata;
+	struct pci_channel *hose = dev->sysdata;
 	resource_size_t start = res->start;
 
 	if (res->flags & IORESOURCE_IO) {
-		if (start < PCIBIOS_MIN_IO + chan->io_resource->start)
-			start = PCIBIOS_MIN_IO + chan->io_resource->start;
+		if (start < PCIBIOS_MIN_IO + hose->resources[0].start)
+			start = PCIBIOS_MIN_IO + hose->resources[0].start;
 
 		/*
                  * Put everything into 0x00-0xff region modulo 0x400.
 		 */
-		if (start & 0x300) {
+		if (start & 0x300)
 			start = (start + 0x3ff) & ~0x3ff;
-			res->start = start;
-		}
-	} else if (res->flags & IORESOURCE_MEM) {
-		if (start < PCIBIOS_MIN_MEM + chan->mem_resource->start)
-			start = PCIBIOS_MIN_MEM + chan->mem_resource->start;
 	}
 
-	res->start = start;
+	return start;
 }
 
-void pcibios_resource_to_bus(struct pci_dev *dev, struct pci_bus_region *region,
-			 struct resource *res)
+static void __init
+pcibios_bus_report_status_early(struct pci_channel *hose,
+				int top_bus, int current_bus,
+				unsigned int status_mask, int warn)
 {
-	struct pci_channel *hose = dev->sysdata;
-	unsigned long offset = 0;
+	unsigned int pci_devfn;
+	u16 status;
+	int ret;
 
-	if (res->flags & IORESOURCE_IO)
-		offset = hose->io_offset;
-	else if (res->flags & IORESOURCE_MEM)
-		offset = hose->mem_offset;
+	for (pci_devfn = 0; pci_devfn < 0xff; pci_devfn++) {
+		if (PCI_FUNC(pci_devfn))
+			continue;
+		ret = early_read_config_word(hose, top_bus, current_bus,
+					     pci_devfn, PCI_STATUS, &status);
+		if (ret != PCIBIOS_SUCCESSFUL)
+			continue;
+		if (status == 0xffff)
+			continue;
 
-	region->start = res->start - offset;
-	region->end = res->end - offset;
+		early_write_config_word(hose, top_bus, current_bus,
+					pci_devfn, PCI_STATUS,
+					status & status_mask);
+		if (warn)
+			printk("(%02x:%02x: %04X) ", current_bus,
+			       pci_devfn, status);
+	}
 }
 
-void __devinit
-pcibios_bus_to_resource(struct pci_dev *dev, struct resource *res,
-			struct pci_bus_region *region)
+/*
+ * We can't use pci_find_device() here since we are
+ * called from interrupt context.
+ */
+static void __init_refok
+pcibios_bus_report_status(struct pci_bus *bus, unsigned int status_mask,
+			  int warn)
 {
-	struct pci_channel *hose = dev->sysdata;
-	unsigned long offset = 0;
+	struct pci_dev *dev;
 
-	if (res->flags & IORESOURCE_IO)
-		offset = hose->io_offset;
-	else if (res->flags & IORESOURCE_MEM)
-		offset = hose->mem_offset;
-
-	res->start = region->start + offset;
-	res->end = region->end + offset;
-}
+	list_for_each_entry(dev, &bus->devices, bus_list) {
+		u16 status;
 
-int pcibios_enable_device(struct pci_dev *dev, int mask)
-{
-	u16 cmd, old_cmd;
-	int idx;
-	struct resource *r;
-
-	pci_read_config_word(dev, PCI_COMMAND, &cmd);
-	old_cmd = cmd;
-	for (idx=0; idx < PCI_NUM_RESOURCES; idx++) {
-		/* Only set up the requested stuff */
-		if (!(mask & (1<<idx)))
+		/*
+		 * ignore host bridge - we handle
+		 * that separately
+		 */
+		if (dev->bus->number == 0 && dev->devfn == 0)
 			continue;
 
-		r = &dev->resource[idx];
-		if (!(r->flags & (IORESOURCE_IO | IORESOURCE_MEM)))
+		pci_read_config_word(dev, PCI_STATUS, &status);
+		if (status == 0xffff)
 			continue;
-		if ((idx == PCI_ROM_RESOURCE) &&
-				(!(r->flags & IORESOURCE_ROM_ENABLE)))
+
+		if ((status & status_mask) == 0)
 			continue;
-		if (!r->start && r->end) {
-			printk(KERN_ERR "PCI: Device %s not available "
-			       "because of resource collisions\n",
-			       pci_name(dev));
-			return -EINVAL;
-		}
-		if (r->flags & IORESOURCE_IO)
-			cmd |= PCI_COMMAND_IO;
-		if (r->flags & IORESOURCE_MEM)
-			cmd |= PCI_COMMAND_MEMORY;
-	}
-	if (cmd != old_cmd) {
-		printk("PCI: Enabling device %s (%04x -> %04x)\n",
-		       pci_name(dev), old_cmd, cmd);
-		pci_write_config_word(dev, PCI_COMMAND, cmd);
-	}
-	return 0;
-}
 
-/*
- *  If we set up a device for bus mastering, we need to check and set
- *  the latency timer as it may not be properly set.
- */
-static unsigned int pcibios_max_latency = 255;
+		/* clear the status errors */
+		pci_write_config_word(dev, PCI_STATUS, status & status_mask);
 
-void pcibios_set_master(struct pci_dev *dev)
-{
-	u8 lat;
-	pci_read_config_byte(dev, PCI_LATENCY_TIMER, &lat);
-	if (lat < 16)
-		lat = (64 <= pcibios_max_latency) ? 64 : pcibios_max_latency;
-	else if (lat > pcibios_max_latency)
-		lat = pcibios_max_latency;
-	else
-		return;
-	printk(KERN_INFO "PCI: Setting latency timer of device %s to %d\n",
-	       pci_name(dev), lat);
-	pci_write_config_byte(dev, PCI_LATENCY_TIMER, lat);
-}
+		if (warn)
+			printk("(%s: %04X) ", pci_name(dev), status);
+	}
 
-void __init pcibios_update_irq(struct pci_dev *dev, int irq)
-{
-	pci_write_config_byte(dev, PCI_INTERRUPT_LINE, irq);
+	list_for_each_entry(dev, &bus->devices, bus_list)
+		if (dev->subordinate)
+			pcibios_bus_report_status(dev->subordinate, status_mask, warn);
 }
 
-char * __devinit pcibios_setup(char *str)
+void __init_refok pcibios_report_status(unsigned int status_mask, int warn)
 {
-	return str;
+	struct pci_channel *hose;
+
+	for (hose = hose_head; hose; hose = hose->next) {
+		if (unlikely(!hose->bus))
+			pcibios_bus_report_status_early(hose, hose_head->index,
+					hose->index, status_mask, warn);
+		else
+			pcibios_bus_report_status(hose->bus, status_mask, warn);
+	}
 }
 
 int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma,
@@ -297,50 +289,21 @@ int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma,
 
 #ifndef CONFIG_GENERIC_IOMAP
 
-static void __iomem *ioport_map_pci(struct pci_dev *dev,
-				    unsigned long port, unsigned int nr)
+void __iomem *__pci_ioport_map(struct pci_dev *dev,
+			       unsigned long port, unsigned int nr)
 {
 	struct pci_channel *chan = dev->sysdata;
 
-	if (!chan->io_map_base)
-		chan->io_map_base = generic_io_base;
+	if (unlikely(!chan->io_map_base)) {
+		chan->io_map_base = sh_io_port_base;
 
-	return (void __iomem *)(chan->io_map_base + port);
-}
-
-void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long maxlen)
-{
-	resource_size_t start = pci_resource_start(dev, bar);
-	resource_size_t len = pci_resource_len(dev, bar);
-	unsigned long flags = pci_resource_flags(dev, bar);
-
-	if (unlikely(!len || !start))
-		return NULL;
-	if (maxlen && len > maxlen)
-		len = maxlen;
-
-	if (flags & IORESOURCE_IO)
-		return ioport_map_pci(dev, start, len);
-
-	/*
-	 * Presently the IORESOURCE_MEM case is a bit special, most
-	 * SH7751 style PCI controllers have PCI memory at a fixed
-	 * location in the address space where no remapping is desired.
-	 * With the IORESOURCE_MEM case more care has to be taken
-	 * to inhibit page table mapping for legacy cores, but this is
-	 * punted off to __ioremap().
-	 *					-- PFM.
-	 */
-	if (flags & IORESOURCE_MEM) {
-		if (flags & IORESOURCE_CACHEABLE)
-			return ioremap(start, len);
-
-		return ioremap_nocache(start, len);
+		if (pci_domains_supported)
+			panic("To avoid data corruption io_map_base MUST be "
+			      "set with multiple PCI domains.");
 	}
 
-	return NULL;
+	return (void __iomem *)(chan->io_map_base + port);
 }
-EXPORT_SYMBOL(pci_iomap);
 
 void pci_iounmap(struct pci_dev *dev, void __iomem *addr)
 {
@@ -350,9 +313,5 @@ EXPORT_SYMBOL(pci_iounmap);
 
 #endif /* CONFIG_GENERIC_IOMAP */
 
-#ifdef CONFIG_HOTPLUG
-EXPORT_SYMBOL(pcibios_resource_to_bus);
-EXPORT_SYMBOL(pcibios_bus_to_resource);
 EXPORT_SYMBOL(PCIBIOS_MIN_IO);
 EXPORT_SYMBOL(PCIBIOS_MIN_MEM);
-#endif