X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=drivers%2Fpci%2Fhotplug%2Frpaphp_pci.c;h=6f6cbede5135cde8cd7f9a8a2b68c6a77b7c8ea9;hb=43bc926fffd92024b46cafaf7350d669ba9ca884;hp=6f5b61b7c61a3ac3157f6c0ebda8ea9a82ec2f2e;hpb=9213980e6a70d8473e0ffd4b39ab5b6caaba9ff5;p=linux-2.6.git

diff --git a/drivers/pci/hotplug/rpaphp_pci.c b/drivers/pci/hotplug/rpaphp_pci.c
index 6f5b61b7c..6f6cbede5 100644
--- a/drivers/pci/hotplug/rpaphp_pci.c
+++ b/drivers/pci/hotplug/rpaphp_pci.c
@@ -23,76 +23,24 @@
  *
  */
 #include <linux/pci.h>
+#include <linux/string.h>
+
 #include <asm/pci-bridge.h>
-#include "../pci.h"		/* for pci_add_new_bus */
+#include <asm/rtas.h>
+#include <asm/machdep.h>
 
+#include "../pci.h"		/* for pci_add_new_bus */
 #include "rpaphp.h"
 
-struct pci_dev *rpaphp_find_pci_dev(struct device_node *dn)
-{
-	struct pci_dev *retval_dev = NULL, *dev;
-	char bus_id[BUS_ID_SIZE];
-
-	sprintf(bus_id, "%04x:%02x:%02x.%d",dn->phb->global_number,
-		dn->busno, PCI_SLOT(dn->devfn), PCI_FUNC(dn->devfn));
-
-	dbg("Enter rpaphp_find_pci_dev() full_name=%s bus_id=%s\n", 
-		dn->full_name, bus_id);
-	
-	while ((dev = pci_find_device(PCI_ANY_ID, PCI_ANY_ID, dev)) != NULL) {
-               if (!strcmp(pci_name(dev), bus_id)) {
-			retval_dev = dev;
-			dbg("rpaphp_find_pci_dev(): found dev=%p\n\n", dev);
-			break;
-		}
-	}
-	return retval_dev;
-
-}
-
-EXPORT_SYMBOL_GPL(rpaphp_find_pci_dev);
-
-int rpaphp_claim_resource(struct pci_dev *dev, int resource)
-{
-	struct resource *res = &dev->resource[resource];
-	struct resource *root = pci_find_parent_resource(dev, res);
-	char *dtype = resource < PCI_BRIDGE_RESOURCES ? "device" : "bridge";
-	int err = -EINVAL;
-
-	if (root != NULL) {
-		err = request_resource(root, res);
-	}
-
-	if (err) {
-		err("PCI: %s region %d of %s %s [%lx:%lx]\n",
-		    root ? "Address space collision on" :
-		    "No parent found for",
-		    resource, dtype, pci_name(dev), res->start, res->end);
-	}
-	return err;
-}
-
-EXPORT_SYMBOL_GPL(rpaphp_claim_resource);
-
-static struct pci_dev *rpaphp_find_bridge_pdev(struct slot *slot)
-{
-	return rpaphp_find_pci_dev(slot->dn);
-}
-
-static struct pci_dev *rpaphp_find_adapter_pdev(struct slot *slot)
-{
-	return rpaphp_find_pci_dev(slot->dn->child);
-}
-
-static int rpaphp_get_sensor_state(struct slot *slot, int *state)
+int rpaphp_get_sensor_state(struct slot *slot, int *state)
 {
 	int rc;
 	int setlevel;
 
 	rc = rtas_get_sensor(DR_ENTITY_SENSE, slot->index, state);
 
-	if (rc) {
-		if (rc == NEED_POWER || rc == PWR_ONLY) {
+	if (rc < 0) {
+		if (rc == -EFAULT || rc == -EEXIST) {
 			dbg("%s: slot must be power up to get sensor-state\n",
 			    __FUNCTION__);
 
@@ -101,14 +49,14 @@ static int rpaphp_get_sensor_state(struct slot *slot, int *state)
 			 */
 			rc = rtas_set_power_level(slot->power_domain, POWER_ON,
 						  &setlevel);
-			if (rc) {
+			if (rc < 0) {
 				dbg("%s: power on slot[%s] failed rc=%d.\n",
 				    __FUNCTION__, slot->name, rc);
 			} else {
 				rc = rtas_get_sensor(DR_ENTITY_SENSE,
 						     slot->index, state);
 			}
-		} else if (rc == ERR_SENSE_USE)
+		} else if (rc == -ENODEV)
 			info("%s: slot is unusable\n", __FUNCTION__);
 		else
 			err("%s failed to get sensor state\n", __FUNCTION__);
@@ -126,276 +74,141 @@ static int rpaphp_get_sensor_state(struct slot *slot, int *state)
  */
 int rpaphp_get_pci_adapter_status(struct slot *slot, int is_init, u8 * value)
 {
+	struct pci_bus *bus;
 	int state, rc;
-	*value = NOT_VALID;
 
+	*value = NOT_VALID;
 	rc = rpaphp_get_sensor_state(slot, &state);
 	if (rc)
 		goto exit;
-	if (state == PRESENT) {
-		if (!is_init)
+
+ 	if (state == EMPTY)
+ 		*value = EMPTY;
+ 	else if (state == PRESENT) {
+		if (!is_init) {
 			/* at run-time slot->state can be changed by */
 			/* config/unconfig adapter */
 			*value = slot->state;
-		else {
-			if (!slot->dn->child)
-				dbg("%s: %s is not valid OFDT node\n",
-				    __FUNCTION__, slot->dn->full_name);
-			else if (rpaphp_find_pci_dev(slot->dn->child))
+		} else {
+			bus = pcibios_find_pci_bus(slot->dn);
+			if (bus && !list_empty(&bus->devices))
 				*value = CONFIGURED;
-			else {
-				dbg("%s: can't find pdev of adapter in slot[%s]\n", __FUNCTION__, slot->name);
+			else
 				*value = NOT_CONFIGURED;
-			}
 		}
-	} else if (state == EMPTY) {
-		dbg("slot is empty\n");
-		*value = state;
 	}
-
 exit:
 	return rc;
 }
 
-/* Must be called before pci_bus_add_devices */
-static void rpaphp_fixup_new_pci_devices(struct pci_bus *bus)
-{
-	struct pci_dev *dev;
-
-	list_for_each_entry(dev, &bus->devices, bus_list) {
-		/*
-		 * Skip already-present devices (which are on the
-		 * global device list.)
-		 */
-		if (list_empty(&dev->global_list)) {
-			int i;
-
-			pcibios_fixup_device_resources(dev, bus);
-			pci_read_irq_line(dev);
-			for (i = 0; i < PCI_NUM_RESOURCES; i++) {
-				struct resource *r = &dev->resource[i];
-
-				if (r->parent || !r->start || !r->flags)
-					continue;
-				rpaphp_claim_resource(dev, i);
-			}
-		}
-	}
-}
-
-static void
-rpaphp_pci_config_device(struct pci_bus *pci_bus, struct device_node *dn)
+static void print_slot_pci_funcs(struct pci_bus *bus)
 {
-	int num;
-
-	num = pci_scan_slot(pci_bus, PCI_DEVFN(PCI_SLOT(dn->devfn), 0));
-	if (num) {
-		rpaphp_fixup_new_pci_devices(pci_bus);
-		pci_bus_add_devices(pci_bus);
-	}
-}
-
-static int rpaphp_pci_config_bridge(struct pci_dev *dev, struct device_node *dn);
-
-/*****************************************************************************
- rpaphp_pci_config_dn() will recursively configure all devices under the 
- given slot->dn and return the dn's pci_dev.
- *****************************************************************************/
-static struct pci_dev *
-rpaphp_pci_config_dn(struct device_node *dn, struct pci_bus *bus)
-{
-	struct device_node *local;
+	struct device_node *dn;
 	struct pci_dev *dev;
 
-	for (local = dn->child; local; local = local->sibling) {
-		rpaphp_pci_config_device(bus, local);
-		dev = rpaphp_find_pci_dev(local);
-		if (!rpaphp_pci_config_bridge(dev, local))
-			return NULL;
-	}
+	dn = pci_bus_to_OF_node(bus);
+	if (!dn)
+		return;
 
-	return dev;
+	dbg("%s: pci_devs of slot[%s]\n", __FUNCTION__, dn->full_name);
+	list_for_each_entry (dev, &bus->devices, bus_list)
+		dbg("\t%s\n", pci_name(dev));
+	return;
 }
 
-static int rpaphp_pci_config_bridge(struct pci_dev *dev, struct device_node *dn)
+static int setup_pci_hotplug_slot_info(struct slot *slot)
 {
-	if (dev && dn->child) {	/* dn is a PCI bridge node */
-		struct pci_bus *child;
-		u8 sec_busno;
-
-		/* get busno of downstream bus */
-		pci_read_config_byte(dev, PCI_SECONDARY_BUS, &sec_busno);
+	struct hotplug_slot_info *hotplug_slot_info = slot->hotplug_slot->info;
 
-		/* add to children of PCI bridge dev->bus */
-		child = pci_add_new_bus(dev->bus, dev, sec_busno);
-		if (!child) {
-			err("%s: could not add second bus\n", __FUNCTION__);
-			return 0;
-		}
-		sprintf(child->name, "PCI Bus #%02x", child->number);
-		/* Fixup subordinate bridge bases and resureces */
-		pcibios_fixup_bus(child);
-
-		/* may need do more stuff here */
-		rpaphp_pci_config_dn(dn, dev->subordinate);
+	dbg("%s Initilize the PCI slot's hotplug->info structure ...\n",
+	    __FUNCTION__);
+	rpaphp_get_power_status(slot, &hotplug_slot_info->power_status);
+	rpaphp_get_pci_adapter_status(slot, 1,
+				      &hotplug_slot_info->adapter_status);
+	if (hotplug_slot_info->adapter_status == NOT_VALID) {
+		err("%s: NOT_VALID: skip dn->full_name=%s\n",
+		    __FUNCTION__, slot->dn->full_name);
+		return -EINVAL;
 	}
-	return 1;
+	return 0;
 }
 
-static struct pci_dev *rpaphp_config_pci_adapter(struct slot *slot)
+static void set_slot_name(struct slot *slot)
 {
-	struct pci_bus *pci_bus;
-	struct pci_dev *dev = NULL;
-
-	dbg("Entry %s: slot[%s]\n", __FUNCTION__, slot->name);
-
-	if (slot->bridge) {
-
-		pci_bus = slot->bridge->subordinate;
-		if (!pci_bus) {
-			err("%s: can't find bus structure\n", __FUNCTION__);
-			goto exit;
-		}
-
-		eeh_add_device_early(slot->dn->child);
-		dev = rpaphp_pci_config_dn(slot->dn, pci_bus);
-		eeh_add_device_late(dev);
-	} else {
-		/* slot is not enabled */
-		err("slot doesn't have pci_dev structure\n");
-		dev = NULL;
-	}
+	struct pci_bus *bus = slot->bus;
+	struct pci_dev *bridge;
 
-exit:
-	dbg("Exit %s: pci_dev %s\n", __FUNCTION__, dev ? "found" : "not found");
-	return dev;
+	bridge = bus->self;
+	if (bridge)
+		strcpy(slot->name, pci_name(bridge));
+	else
+		sprintf(slot->name, "%04x:%02x:00.0", pci_domain_nr(bus),
+			bus->number);
 }
 
-int rpaphp_unconfig_pci_adapter(struct slot *slot)
+static int setup_pci_slot(struct slot *slot)
 {
-	int retval = 0;
-
-	dbg("Entry %s: slot[%s]\n", __FUNCTION__, slot->name);
-	if (!slot->dev.pci_dev) {
-		info("%s: no card in slot[%s]\n", __FUNCTION__, slot->name);
+	struct device_node *dn = slot->dn;
+	struct pci_bus *bus;
 
-		retval = -EINVAL;
-		goto exit;
+	BUG_ON(!dn);
+	bus = pcibios_find_pci_bus(dn);
+	if (!bus) {
+		err("%s: no pci_bus for dn %s\n", __FUNCTION__, dn->full_name);
+		goto exit_rc;
 	}
-	/* remove the device from the pci core */
-	eeh_remove_device(slot->dev.pci_dev);
-	pci_remove_bus_device(slot->dev.pci_dev);
 
-	slot->state = NOT_CONFIGURED;
-	info("%s: adapter in slot[%s] unconfigured.\n", __FUNCTION__,
-	     slot->name);
-exit:
-	dbg("Exit %s, rc=0x%x\n", __FUNCTION__, retval);
-	return retval;
-}
+	slot->bus = bus;
+	slot->pci_devs = &bus->devices;
+	set_slot_name(slot);
 
-static int setup_pci_hotplug_slot_info(struct slot *slot)
-{
-	dbg("%s Initilize the PCI slot's hotplug->info structure ...\n",
-	    __FUNCTION__);
-	rpaphp_get_power_status(slot, &slot->hotplug_slot->info->power_status);
-	rpaphp_get_pci_adapter_status(slot, 1,
-				      &slot->hotplug_slot->info->
-				      adapter_status);
-	if (slot->hotplug_slot->info->adapter_status == NOT_VALID) {
-		dbg("%s: NOT_VALID: skip dn->full_name=%s\n",
-		    __FUNCTION__, slot->dn->full_name);
-		return -1;
-	}
-	return 0;
-}
-
-static int setup_pci_slot(struct slot *slot)
-{
-	slot->bridge = rpaphp_find_bridge_pdev(slot);
-	if (!slot->bridge) {	/* slot being added doesn't have pci_dev yet */
-		dbg("%s: no pci_dev for bridge dn %s\n", __FUNCTION__, slot->name);
-		dealloc_slot_struct(slot);
-		return 1;
-	}
-	
-	strcpy(slot->name, pci_name(slot->bridge));
 	/* find slot's pci_dev if it's not empty */
 	if (slot->hotplug_slot->info->adapter_status == EMPTY) {
 		slot->state = EMPTY;	/* slot is empty */
-		slot->dev.pci_dev = NULL;
 	} else {
 		/* slot is occupied */
-		if (!(slot->dn->child)) {
+		if (!dn->child) {
 			/* non-empty slot has to have child */
-			err("%s: slot[%s]'s device_node doesn't have child for adapter\n", __FUNCTION__, slot->name);
-			dealloc_slot_struct(slot);
-			return 1;
+			err("%s: slot[%s]'s device_node doesn't have child for adapter\n", 
+				__FUNCTION__, slot->name);
+			goto exit_rc;
+		}
+
+		if (slot->hotplug_slot->info->adapter_status == NOT_CONFIGURED) {
+			dbg("%s CONFIGURING pci adapter in slot[%s]\n",  
+				__FUNCTION__, slot->name);
+			pcibios_add_pci_devices(slot->bus);
+
+		} else if (slot->hotplug_slot->info->adapter_status != CONFIGURED) {
+			err("%s: slot[%s]'s adapter_status is NOT_VALID.\n",
+				__FUNCTION__, slot->name);
+			goto exit_rc;
 		}
-		slot->dev.pci_dev = rpaphp_find_adapter_pdev(slot);
-		if (slot->dev.pci_dev) {
+		print_slot_pci_funcs(slot->bus);
+		if (!list_empty(slot->pci_devs)) {
 			slot->state = CONFIGURED;
-		
 		} else {
 			/* DLPAR add as opposed to 
-			 * boot time */
+		 	 * boot time */
 			slot->state = NOT_CONFIGURED;
 		}
 	}
 	return 0;
+exit_rc:
+	dealloc_slot_struct(slot);
+	return -EINVAL;
 }
 
-int register_pci_slot(struct slot *slot)
+int rpaphp_register_pci_slot(struct slot *slot)
 {
-	int rc = 1;
+	int rc = -EINVAL;
 
-	slot->dev_type = PCI_DEV;
 	if (setup_pci_hotplug_slot_info(slot))
 		goto exit_rc;
 	if (setup_pci_slot(slot))
 		goto exit_rc;
-	rc = register_slot(slot);
+	rc = rpaphp_register_slot(slot);
 exit_rc:
-	if (rc)
-		dealloc_slot_struct(slot);
 	return rc;
 }
 
-int rpaphp_enable_pci_slot(struct slot *slot)
-{
-	int retval = 0, state;
-
-	retval = rpaphp_get_sensor_state(slot, &state);
-	if (retval)
-		goto exit;
-	dbg("%s: sensor state[%d]\n", __FUNCTION__, state);
-	/* if slot is not empty, enable the adapter */
-	if (state == PRESENT) {
-		dbg("%s : slot[%s] is occupid.\n", __FUNCTION__, slot->name);
-		if ((slot->dev.pci_dev =
-		     rpaphp_config_pci_adapter(slot)) != NULL) {
-			slot->state = CONFIGURED;
-			dbg("%s: PCI adapter %s in slot[%s] has been configured\n", 
-				__FUNCTION__, pci_name(slot->dev.pci_dev), slot->name);
-		} else {
-			slot->state = NOT_CONFIGURED;
-			dbg("%s: no pci_dev struct for adapter in slot[%s]\n",
-			    __FUNCTION__, slot->name);
-		}
-	} else if (state == EMPTY) {
-		dbg("%s : slot[%s] is empty\n", __FUNCTION__, slot->name);
-		slot->state = EMPTY;
-	} else {
-		err("%s: slot[%s] is in invalid state\n", __FUNCTION__,
-		    slot->name);
-		slot->state = NOT_VALID;
-		retval = -EINVAL;
-	}
-exit:
-	if (slot->state != NOT_VALID)
-		rpaphp_set_attention_status(slot, LED_ON);
-	else
-		rpaphp_set_attention_status(slot, LED_ID);
-	dbg("%s - Exit: rc[%d]\n", __FUNCTION__, retval);
-	return retval;
-}