Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/drivers/pci/hotplug/rpaphp_pci.c b/drivers/pci/hotplug/rpaphp_pci.c
new file mode 100644
index 0000000..d8305a9
--- /dev/null
+++ b/drivers/pci/hotplug/rpaphp_pci.c
@@ -0,0 +1,538 @@
+/*
+ * PCI Hot Plug Controller Driver for RPA-compliant PPC64 platform.
+ * Copyright (C) 2003 Linda Xie <lxie@us.ibm.com>
+ *
+ * All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or (at
+ * your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ * NON INFRINGEMENT. See the GNU General Public License for more
+ * details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ * Send feedback to <lxie@us.ibm.com>
+ *
+ */
+#include <linux/pci.h>
+#include <asm/pci-bridge.h>
+#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 *dev = NULL;
+ 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));
+ for_each_pci_dev(dev) {
+ if (!strcmp(pci_name(dev), bus_id)) {
+ break;
+ }
+ }
+ return 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 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 < 0) {
+ if (rc == -EFAULT || rc == -EEXIST) {
+ dbg("%s: slot must be power up to get sensor-state\n",
+ __FUNCTION__);
+
+ /* some slots have to be powered up
+ * before get-sensor will succeed.
+ */
+ rc = rtas_set_power_level(slot->power_domain, POWER_ON,
+ &setlevel);
+ 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 == -ENODEV)
+ info("%s: slot is unusable\n", __FUNCTION__);
+ else
+ err("%s failed to get sensor state\n", __FUNCTION__);
+ }
+ return rc;
+}
+
+/**
+ * get_pci_adapter_status - get the status of a slot
+ *
+ * 0-- slot is empty
+ * 1-- adapter is configured
+ * 2-- adapter is not configured
+ * 3-- not valid
+ */
+int rpaphp_get_pci_adapter_status(struct slot *slot, int is_init, u8 * value)
+{
+ int state, rc;
+ struct device_node *child_dn;
+ struct pci_dev *child_dev = NULL;
+
+ *value = NOT_VALID;
+ rc = rpaphp_get_sensor_state(slot, &state);
+ if (rc)
+ goto exit;
+
+ if ((state == EMPTY) || (slot->type == PHB)) {
+ dbg("slot is empty\n");
+ *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 {
+ child_dn = slot->dn->child;
+ if (child_dn)
+ child_dev = rpaphp_find_pci_dev(child_dn);
+
+ if (child_dev)
+ *value = CONFIGURED;
+ else if (!child_dn)
+ dbg("%s: %s is not valid OFDT node\n",
+ __FUNCTION__, slot->dn->full_name);
+ else {
+ err("%s: can't find pdev of adapter in slot[%s]\n",
+ __FUNCTION__, slot->dn->full_name);
+ *value = NOT_CONFIGURED;
+ }
+ }
+ }
+exit:
+ return rc;
+}
+
+/* Must be called before pci_bus_add_devices */
+static void
+rpaphp_fixup_new_pci_devices(struct pci_bus *bus, int fix_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;
+
+ /* Need to setup IOMMU tables */
+ ppc_md.iommu_dev_setup(dev);
+
+ if(fix_bus)
+ 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 int rpaphp_pci_config_bridge(struct pci_dev *dev);
+
+/*****************************************************************************
+ rpaphp_pci_config_slot() will configure all devices under the
+ given slot->dn and return the the first pci_dev.
+ *****************************************************************************/
+static struct pci_dev *
+rpaphp_pci_config_slot(struct device_node *dn, struct pci_bus *bus)
+{
+ struct device_node *eads_first_child = dn->child;
+ struct pci_dev *dev = NULL;
+ int num;
+
+ dbg("Enter %s: dn=%s bus=%s\n", __FUNCTION__, dn->full_name, bus->name);
+
+ if (eads_first_child) {
+ /* pci_scan_slot should find all children of EADs */
+ num = pci_scan_slot(bus, PCI_DEVFN(PCI_SLOT(eads_first_child->devfn), 0));
+ if (num) {
+ rpaphp_fixup_new_pci_devices(bus, 1);
+ pci_bus_add_devices(bus);
+ }
+ dev = rpaphp_find_pci_dev(eads_first_child);
+ if (!dev) {
+ err("No new device found\n");
+ return NULL;
+ }
+ if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE)
+ rpaphp_pci_config_bridge(dev);
+ }
+ return dev;
+}
+
+static int rpaphp_pci_config_bridge(struct pci_dev *dev)
+{
+ u8 sec_busno;
+ struct pci_bus *child_bus;
+ struct pci_dev *child_dev;
+
+ dbg("Enter %s: BRIDGE dev=%s\n", __FUNCTION__, pci_name(dev));
+
+ /* get busno of downstream bus */
+ pci_read_config_byte(dev, PCI_SECONDARY_BUS, &sec_busno);
+
+ /* add to children of PCI bridge dev->bus */
+ child_bus = pci_add_new_bus(dev->bus, dev, sec_busno);
+ if (!child_bus) {
+ err("%s: could not add second bus\n", __FUNCTION__);
+ return -EIO;
+ }
+ sprintf(child_bus->name, "PCI Bus #%02x", child_bus->number);
+ /* do pci_scan_child_bus */
+ pci_scan_child_bus(child_bus);
+
+ list_for_each_entry(child_dev, &child_bus->devices, bus_list) {
+ eeh_add_device_late(child_dev);
+ }
+
+ /* fixup new pci devices without touching bus struct */
+ rpaphp_fixup_new_pci_devices(child_bus, 0);
+
+ /* Make the discovered devices available */
+ pci_bus_add_devices(child_bus);
+ return 0;
+}
+
+static void enable_eeh(struct device_node *dn)
+{
+ struct device_node *sib;
+
+ for (sib = dn->child; sib; sib = sib->sibling)
+ enable_eeh(sib);
+ eeh_add_device_early(dn);
+ return;
+
+}
+
+static void print_slot_pci_funcs(struct slot *slot)
+{
+ struct pci_dev *dev;
+
+ if (slot->dev_type == PCI_DEV) {
+ dbg("%s: pci_devs of slot[%s]\n", __FUNCTION__, slot->name);
+ list_for_each_entry (dev, slot->dev.pci_devs, bus_list)
+ dbg("\t%s\n", pci_name(dev));
+ }
+ return;
+}
+
+static int rpaphp_config_pci_adapter(struct slot *slot)
+{
+ struct pci_bus *pci_bus;
+ struct pci_dev *dev;
+ int rc = -ENODEV;
+
+ 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;
+ }
+ enable_eeh(slot->dn);
+ dev = rpaphp_pci_config_slot(slot->dn, pci_bus);
+ if (!dev) {
+ err("%s: can't find any devices.\n", __FUNCTION__);
+ goto exit;
+ }
+ print_slot_pci_funcs(slot);
+ rc = 0;
+ } else {
+ /* slot is not enabled */
+ err("slot doesn't have pci_dev structure\n");
+ }
+exit:
+ dbg("Exit %s: rc=%d\n", __FUNCTION__, rc);
+ return rc;
+}
+
+static void rpaphp_eeh_remove_bus_device(struct pci_dev *dev)
+{
+ eeh_remove_device(dev);
+ if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE) {
+ struct pci_bus *bus = dev->subordinate;
+ struct list_head *ln;
+ if (!bus)
+ return;
+ for (ln = bus->devices.next; ln != &bus->devices; ln = ln->next) {
+ struct pci_dev *pdev = pci_dev_b(ln);
+ if (pdev)
+ rpaphp_eeh_remove_bus_device(pdev);
+ }
+
+ }
+ return;
+}
+
+int rpaphp_unconfig_pci_adapter(struct slot *slot)
+{
+ struct pci_dev *dev;
+ int retval = 0;
+
+ list_for_each_entry(dev, slot->dev.pci_devs, bus_list)
+ rpaphp_eeh_remove_bus_device(dev);
+
+ pci_remove_behind_bridge(slot->bridge);
+ slot->state = NOT_CONFIGURED;
+ info("%s: devices in slot[%s] unconfigured.\n", __FUNCTION__,
+ slot->name);
+ return retval;
+}
+
+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) {
+ err("%s: NOT_VALID: skip dn->full_name=%s\n",
+ __FUNCTION__, slot->dn->full_name);
+ return -EINVAL;
+ }
+ return 0;
+}
+
+static int set_phb_slot_name(struct slot *slot)
+{
+ struct device_node *dn;
+ struct pci_controller *phb;
+ struct pci_bus *bus;
+
+ dn = slot->dn;
+ if (!dn) {
+ return -EINVAL;
+ }
+ phb = dn->phb;
+ if (!phb) {
+ return -EINVAL;
+ }
+ bus = phb->bus;
+ if (!bus) {
+ return -EINVAL;
+ }
+
+ sprintf(slot->name, "%04x:%02x:%02x.%x", pci_domain_nr(bus),
+ bus->number, 0, 0);
+ return 0;
+}
+
+static int setup_pci_slot(struct slot *slot)
+{
+ struct pci_bus *bus;
+ int rc;
+
+ if (slot->type == PHB) {
+ rc = set_phb_slot_name(slot);
+ if (rc < 0) {
+ err("%s: failed to set phb slot name\n", __FUNCTION__);
+ goto exit_rc;
+ }
+ } else {
+ slot->bridge = rpaphp_find_bridge_pdev(slot);
+ if (!slot->bridge) {
+ /* slot being added doesn't have pci_dev yet */
+ err("%s: no pci_dev for bridge dn %s\n",
+ __FUNCTION__, slot->name);
+ goto exit_rc;
+ }
+
+ bus = slot->bridge->subordinate;
+ if (!bus)
+ goto exit_rc;
+ slot->dev.pci_devs = &bus->devices;
+
+ dbg("%s set slot->name to %s\n", __FUNCTION__,
+ pci_name(slot->bridge));
+ 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 */
+ } else {
+ /* slot is occupied */
+ if (!(slot->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);
+ goto exit_rc;
+ }
+
+ if (slot->hotplug_slot->info->adapter_status == NOT_CONFIGURED) {
+ dbg("%s CONFIGURING pci adapter in slot[%s]\n",
+ __FUNCTION__, slot->name);
+ if (rpaphp_config_pci_adapter(slot)) {
+ err("%s: CONFIG pci adapter failed\n", __FUNCTION__);
+ goto exit_rc;
+ }
+
+ } 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;
+ }
+ print_slot_pci_funcs(slot);
+ if (!list_empty(slot->dev.pci_devs)) {
+ slot->state = CONFIGURED;
+ } else {
+ /* DLPAR add as opposed to
+ * boot time */
+ slot->state = NOT_CONFIGURED;
+ }
+ }
+ return 0;
+exit_rc:
+ dealloc_slot_struct(slot);
+ return -EINVAL;
+}
+
+int register_pci_slot(struct slot *slot)
+{
+ int rc = -EINVAL;
+
+ slot->dev_type = PCI_DEV;
+ if ((slot->type == EMBEDDED) || (slot->type == PHB))
+ slot->removable = 0;
+ else
+ slot->removable = 1;
+ if (setup_pci_hotplug_slot_info(slot))
+ goto exit_rc;
+ if (setup_pci_slot(slot))
+ goto exit_rc;
+ rc = register_slot(slot);
+exit_rc:
+ 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 occupied.\n", __FUNCTION__, slot->name);
+ retval = rpaphp_config_pci_adapter(slot);
+ if (!retval) {
+ slot->state = CONFIGURED;
+ dbg("%s: PCI devices in slot[%s] has been configured\n",
+ __FUNCTION__, 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:
+ dbg("%s - Exit: rc[%d]\n", __FUNCTION__, retval);
+ return retval;
+}
+
+struct hotplug_slot *rpaphp_find_hotplug_slot(struct pci_dev *dev)
+{
+ struct list_head *tmp, *n;
+ struct slot *slot;
+
+ list_for_each_safe(tmp, n, &rpaphp_slot_head) {
+ struct pci_bus *bus;
+ struct list_head *ln;
+
+ slot = list_entry(tmp, struct slot, rpaphp_slot_list);
+ if (slot->bridge == NULL) {
+ if (slot->dev_type == PCI_DEV) {
+ printk(KERN_WARNING "PCI slot missing bridge %s %s \n",
+ slot->name, slot->location);
+ }
+ continue;
+ }
+
+ bus = slot->bridge->subordinate;
+ if (!bus) {
+ continue; /* should never happen? */
+ }
+ for (ln = bus->devices.next; ln != &bus->devices; ln = ln->next) {
+ struct pci_dev *pdev = pci_dev_b(ln);
+ if (pdev == dev)
+ return slot->hotplug_slot;
+ }
+ }
+
+ return NULL;
+}
+
+EXPORT_SYMBOL_GPL(rpaphp_find_hotplug_slot);
