mirror of https://gitee.com/openkylin/linux.git
[PATCH] dlpar regression for ppc64 - probe change
This patch contains the driver bits for enabling DLPAR and PCI Hotplug for the new OF-based PCI probe. This functionality was regressed when the new PCI approach was introduced. Please apply if appropriate. Signed-off-by: John Rose <johnrose@austin.ibm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
John Rose
Greg Kroah-Hartman
parent
249bb070f5
commit
5fa80fcdca
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@ -134,43 +134,6 @@ static void rpadlpar_claim_one_bus(struct pci_bus *b)
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rpadlpar_claim_one_bus(child_bus);
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}
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static int pci_add_secondary_bus(struct device_node *dn,
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struct pci_dev *bridge_dev)
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{
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struct pci_dn *pdn = dn->data;
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struct pci_controller *hose = pdn->phb;
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struct pci_bus *child;
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u8 sec_busno;
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/* Get busno of downstream bus */
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pci_read_config_byte(bridge_dev, PCI_SECONDARY_BUS, &sec_busno);
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/* Allocate and add to children of bridge_dev->bus */
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child = pci_add_new_bus(bridge_dev->bus, bridge_dev, sec_busno);
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if (!child) {
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printk(KERN_ERR "%s: could not add secondary bus\n", __FUNCTION__);
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return -ENOMEM;
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}
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sprintf(child->name, "PCI Bus #%02x", child->number);
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/* Fixup subordinate bridge bases and resources */
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pcibios_fixup_bus(child);
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/* Claim new bus resources */
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rpadlpar_claim_one_bus(bridge_dev->bus);
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if (hose->last_busno < child->number)
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hose->last_busno = child->number;
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pdn->bussubno = child->number;
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/* ioremap() for child bus, which may or may not succeed */
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remap_bus_range(child);
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return 0;
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}
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static struct pci_dev *dlpar_find_new_dev(struct pci_bus *parent,
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struct device_node *dev_dn)
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{
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@ -188,29 +151,41 @@ static struct pci_dev *dlpar_find_new_dev(struct pci_bus *parent,
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static struct pci_dev *dlpar_pci_add_bus(struct device_node *dn)
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{
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struct pci_dn *pdn = dn->data;
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struct pci_controller *hose = pdn->phb;
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struct pci_controller *phb = pdn->phb;
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struct pci_dev *dev = NULL;
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/* Scan phb bus for EADS device, adding new one to bus->devices */
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if (!pci_scan_single_device(hose->bus, pdn->devfn)) {
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printk(KERN_ERR "%s: found no device on bus\n", __FUNCTION__);
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rpaphp_eeh_init_nodes(dn);
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/* Add EADS device to PHB bus, adding new entry to bus->devices */
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dev = of_create_pci_dev(dn, phb->bus, pdn->devfn);
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if (!dev) {
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printk(KERN_ERR "%s: failed to create pci dev for %s\n",
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__FUNCTION__, dn->full_name);
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return NULL;
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}
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if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE ||
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dev->hdr_type == PCI_HEADER_TYPE_CARDBUS)
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of_scan_pci_bridge(dn, dev);
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rpaphp_init_new_devs(dev->subordinate);
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/* Claim new bus resources */
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rpadlpar_claim_one_bus(dev->bus);
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/* ioremap() for child bus, which may or may not succeed */
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(void) remap_bus_range(dev->bus);
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/* Add new devices to global lists. Register in proc, sysfs. */
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pci_bus_add_devices(hose->bus);
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pci_bus_add_devices(phb->bus);
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/* Confirm new bridge dev was created */
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dev = dlpar_find_new_dev(hose->bus, dn);
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dev = dlpar_find_new_dev(phb->bus, dn);
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if (dev) {
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if (dev->hdr_type != PCI_HEADER_TYPE_BRIDGE) {
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printk(KERN_ERR "%s: unexpected header type %d\n",
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__FUNCTION__, dev->hdr_type);
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return NULL;
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}
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if (pci_add_secondary_bus(dn, dev))
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return NULL;
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}
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return dev;
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@ -219,7 +194,6 @@ static struct pci_dev *dlpar_pci_add_bus(struct device_node *dn)
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static int dlpar_add_pci_slot(char *drc_name, struct device_node *dn)
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{
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struct pci_dev *dev;
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int rc;
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if (rpaphp_find_pci_bus(dn))
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return -EINVAL;
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@ -232,15 +206,6 @@ static int dlpar_add_pci_slot(char *drc_name, struct device_node *dn)
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return -EIO;
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}
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if (dn->child) {
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rc = rpaphp_config_pci_adapter(dev->subordinate);
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if (rc < 0) {
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printk(KERN_ERR "%s: unable to enable slot %s\n",
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__FUNCTION__, drc_name);
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return -EIO;
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}
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}
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/* Add hotplug slot */
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if (rpaphp_add_slot(dn)) {
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printk(KERN_ERR "%s: unable to add hotplug slot %s\n",
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@ -435,6 +400,8 @@ int dlpar_remove_pci_slot(char *drc_name, struct device_node *dn)
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__FUNCTION__, drc_name);
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return -EIO;
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}
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} else {
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rpaphp_unconfig_pci_adapter(bus);
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}
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if (unmap_bus_range(bus)) {
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@ -93,6 +93,8 @@ extern int rpaphp_claim_resource(struct pci_dev *dev, int resource);
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extern int rpaphp_enable_pci_slot(struct slot *slot);
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extern int register_pci_slot(struct slot *slot);
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extern int rpaphp_get_pci_adapter_status(struct slot *slot, int is_init, u8 * value);
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extern void rpaphp_init_new_devs(struct pci_bus *bus);
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extern void rpaphp_eeh_init_nodes(struct device_node *dn);
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extern int rpaphp_config_pci_adapter(struct pci_bus *bus);
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extern int rpaphp_unconfig_pci_adapter(struct pci_bus *bus);
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@ -154,8 +154,7 @@ int rpaphp_get_pci_adapter_status(struct slot *slot, int is_init, u8 * value)
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}
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/* Must be called before pci_bus_add_devices */
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static void
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rpaphp_fixup_new_pci_devices(struct pci_bus *bus, int fix_bus)
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void rpaphp_fixup_new_pci_devices(struct pci_bus *bus, int fix_bus)
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{
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struct pci_dev *dev;
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@ -184,6 +183,20 @@ rpaphp_fixup_new_pci_devices(struct pci_bus *bus, int fix_bus)
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}
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}
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static void rpaphp_eeh_add_bus_device(struct pci_bus *bus)
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{
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struct pci_dev *dev;
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list_for_each_entry(dev, &bus->devices, bus_list) {
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eeh_add_device_late(dev);
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if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE) {
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struct pci_bus *subbus = dev->subordinate;
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if (subbus)
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rpaphp_eeh_add_bus_device (subbus);
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}
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}
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}
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static int rpaphp_pci_config_bridge(struct pci_dev *dev)
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{
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u8 sec_busno;
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@ -217,6 +230,13 @@ static int rpaphp_pci_config_bridge(struct pci_dev *dev)
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return 0;
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}
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void rpaphp_init_new_devs(struct pci_bus *bus)
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{
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rpaphp_fixup_new_pci_devices(bus, 0);
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rpaphp_eeh_add_bus_device(bus);
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}
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EXPORT_SYMBOL_GPL(rpaphp_init_new_devs);
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/*****************************************************************************
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rpaphp_pci_config_slot() will configure all devices under the
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given slot->dn and return the the first pci_dev.
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@ -233,36 +253,51 @@ rpaphp_pci_config_slot(struct pci_bus *bus)
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if (!dn || !dn->child)
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return NULL;
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slotno = PCI_SLOT(PCI_DN(dn->child)->devfn);
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if (systemcfg->platform == PLATFORM_PSERIES_LPAR) {
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of_scan_bus(dn, bus);
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if (list_empty(&bus->devices)) {
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err("%s: No new device found\n", __FUNCTION__);
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return NULL;
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}
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/* pci_scan_slot should find all children */
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num = pci_scan_slot(bus, PCI_DEVFN(slotno, 0));
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if (num) {
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rpaphp_fixup_new_pci_devices(bus, 1);
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rpaphp_init_new_devs(bus);
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pci_bus_add_devices(bus);
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}
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if (list_empty(&bus->devices)) {
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err("%s: No new device found\n", __FUNCTION__);
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return NULL;
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}
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list_for_each_entry(dev, &bus->devices, bus_list) {
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if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE)
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rpaphp_pci_config_bridge(dev);
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dev = list_entry(&bus->devices, struct pci_dev, bus_list);
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} else {
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slotno = PCI_SLOT(PCI_DN(dn->child)->devfn);
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/* pci_scan_slot should find all children */
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num = pci_scan_slot(bus, PCI_DEVFN(slotno, 0));
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if (num) {
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rpaphp_fixup_new_pci_devices(bus, 1);
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pci_bus_add_devices(bus);
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}
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if (list_empty(&bus->devices)) {
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err("%s: No new device found\n", __FUNCTION__);
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return NULL;
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}
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list_for_each_entry(dev, &bus->devices, bus_list) {
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if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE)
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rpaphp_pci_config_bridge(dev);
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rpaphp_eeh_add_bus_device(bus);
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}
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}
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return dev;
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}
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static void enable_eeh(struct device_node *dn)
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void rpaphp_eeh_init_nodes(struct device_node *dn)
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{
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struct device_node *sib;
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for (sib = dn->child; sib; sib = sib->sibling)
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enable_eeh(sib);
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rpaphp_eeh_init_nodes(sib);
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eeh_add_device_early(dn);
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return;
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}
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EXPORT_SYMBOL_GPL(rpaphp_eeh_init_nodes);
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static void print_slot_pci_funcs(struct pci_bus *bus)
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{
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@ -289,7 +324,7 @@ int rpaphp_config_pci_adapter(struct pci_bus *bus)
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if (!dn)
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goto exit;
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enable_eeh(dn);
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rpaphp_eeh_init_nodes(dn);
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dev = rpaphp_pci_config_slot(bus);
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if (!dev) {
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err("%s: can't find any devices.\n", __FUNCTION__);
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@ -331,6 +366,7 @@ int rpaphp_unconfig_pci_adapter(struct pci_bus *bus)
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}
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return 0;
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}
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EXPORT_SYMBOL_GPL(rpaphp_unconfig_pci_adapter);
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static int setup_pci_hotplug_slot_info(struct slot *slot)
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{
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@ -444,8 +480,8 @@ int rpaphp_enable_pci_slot(struct slot *slot)
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retval = rpaphp_config_pci_adapter(slot->bus);
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if (!retval) {
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slot->state = CONFIGURED;
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dbg("%s: PCI devices in slot[%s] has been configured\n",
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__FUNCTION__, slot->name);
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info("%s: devices in slot[%s] configured\n",
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__FUNCTION__, slot->name);
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} else {
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slot->state = NOT_CONFIGURED;
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dbg("%s: no pci_dev struct for adapter in slot[%s]\n",
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