/* * This file is subject to the terms and conditions of the GNU General Public * License. See the file "COPYING" in the main directory of this archive * for more details. * * Copyright (C) 2005-2006 Silicon Graphics, Inc. All rights reserved. * * This work was based on the 2.4/2.6 kernel development by Dick Reigner. * Work to add BIOS PROM support was completed by Mike Habeck. */ #include <linux/init.h>#include <linux/kernel.h>#include <linux/module.h>#include <linux/pci.h>#include <linux/pci_hotplug.h>#include <linux/proc_fs.h>#include <linux/slab.h>#include <linux/types.h>#include <linux/mutex.h> #include <asm/sn/addrs.h>#include <asm/sn/geo.h>#include <asm/sn/l1.h>#include <asm/sn/module.h>#include <asm/sn/pcibr_provider.h>#include <asm/sn/pcibus_provider_defs.h>#include <asm/sn/pcidev.h>#include <asm/sn/sn_feature_sets.h>#include <asm/sn/sn_sal.h>#include <asm/sn/types.h>#include <linux/acpi.h>#include <asm/sn/acpi.h> #include "../pci.h" MODULE_LICENSE("GPL");MODULE_AUTHOR("SGI (prarit@sgi.com, dickie@sgi.com, habeck@sgi.com)");MODULE_DESCRIPTION("SGI Altix Hot Plug PCI Controller Driver"); /* SAL call error codes. Keep in sync with prom header io/include/pcibr.h */#define PCI_SLOT_ALREADY_UP 2 /* slot already up */#define PCI_SLOT_ALREADY_DOWN 3 /* slot already down */#define PCI_L1_ERR 7 /* L1 console command error */#define PCI_EMPTY_33MHZ 15 /* empty 33 MHz bus */ #define PCIIO_ASIC_TYPE_TIOCA 4#define PCI_L1_QSIZE 128 /* our L1 message buffer size */#define SN_MAX_HP_SLOTS 32 /* max hotplug slots */#define SN_SLOT_NAME_SIZE 33 /* size of name string */ /* internal list head */static struct list_head sn_hp_list; /* hotplug_slot struct's private pointer */struct slot { int device_num; struct pci_bus *pci_bus; /* this struct for glue internal only */ struct hotplug_slot *hotplug_slot; struct list_head hp_list; char physical_path[SN_SLOT_NAME_SIZE];}; struct pcibr_slot_enable_resp { int resp_sub_errno; char resp_l1_msg[PCI_L1_QSIZE + 1];}; struct pcibr_slot_disable_resp { int resp_sub_errno; char resp_l1_msg[PCI_L1_QSIZE + 1];}; enum sn_pci_req_e { PCI_REQ_SLOT_ELIGIBLE, PCI_REQ_SLOT_DISABLE}; static int enable_slot(struct hotplug_slot *slot);static int disable_slot(struct hotplug_slot *slot);static inline int get_power_status(struct hotplug_slot *slot, u8 *value); static struct hotplug_slot_ops sn_hotplug_slot_ops = { .enable_slot = enable_slot, .disable_slot = disable_slot, .get_power_status = get_power_status,}; static DEFINE_MUTEX(sn_hotplug_mutex); static ssize_t path_show(struct pci_slot *pci_slot, char *buf){ int retval = -ENOENT; struct slot *slot = pci_slot->hotplug->private; if (!slot) return retval; retval = sprintf (buf, "%s\n", slot->physical_path); return retval;} static struct pci_slot_attribute sn_slot_path_attr = __ATTR_RO(path); static int sn_pci_slot_valid(struct pci_bus *pci_bus, int device){ struct pcibus_info *pcibus_info; u16 busnum, segment, ioboard_type; pcibus_info = SN_PCIBUS_BUSSOFT_INFO(pci_bus); /* Check to see if this is a valid slot on 'pci_bus' */ if (!(pcibus_info->pbi_valid_devices & (1 << device))) return -EPERM; ioboard_type = sn_ioboard_to_pci_bus(pci_bus); busnum = pcibus_info->pbi_buscommon.bs_persist_busnum; segment = pci_domain_nr(pci_bus) & 0xf; /* Do not allow hotplug operations on base I/O cards */ if ((ioboard_type == L1_BRICKTYPE_IX || ioboard_type == L1_BRICKTYPE_IA) && (segment == 1 && busnum == 0 && device != 1)) return -EPERM; return 1;} static int sn_pci_bus_valid(struct pci_bus *pci_bus){ struct pcibus_info *pcibus_info; u32 asic_type; u16 ioboard_type; /* Don't register slots hanging off the TIOCA bus */ pcibus_info = SN_PCIBUS_BUSSOFT_INFO(pci_bus); asic_type = pcibus_info->pbi_buscommon.bs_asic_type; if (asic_type == PCIIO_ASIC_TYPE_TIOCA) return -EPERM; /* Only register slots in I/O Bricks that support hotplug */ ioboard_type = sn_ioboard_to_pci_bus(pci_bus); switch (ioboard_type) { case L1_BRICKTYPE_IX: case L1_BRICKTYPE_PX: case L1_BRICKTYPE_IA: case L1_BRICKTYPE_PA: case L1_BOARDTYPE_PCIX3SLOT: return 1; break; default: return -EPERM; break; } return -EIO;} static int sn_hp_slot_private_alloc(struct hotplug_slot *bss_hotplug_slot, struct pci_bus *pci_bus, int device, char *name){ struct pcibus_info *pcibus_info; struct slot *slot; pcibus_info = SN_PCIBUS_BUSSOFT_INFO(pci_bus); slot = kzalloc(sizeof(*slot), GFP_KERNEL); if (!slot) return -ENOMEM; bss_hotplug_slot->private = slot; slot->device_num = device; slot->pci_bus = pci_bus; sprintf(name, "%04x:%02x:%02x", pci_domain_nr(pci_bus), ((u16)pcibus_info->pbi_buscommon.bs_persist_busnum), device + 1); sn_generate_path(pci_bus, slot->physical_path); slot->hotplug_slot = bss_hotplug_slot; list_add(&slot->hp_list, &sn_hp_list); return 0;} static struct hotplug_slot * sn_hp_destroy(void){ struct slot *slot; struct pci_slot *pci_slot; struct hotplug_slot *bss_hotplug_slot = NULL; list_for_each_entry(slot, &sn_hp_list, hp_list) { bss_hotplug_slot = slot->hotplug_slot; pci_slot = bss_hotplug_slot->pci_slot; list_del(&((struct slot *)bss_hotplug_slot->private)-> hp_list); sysfs_remove_file(&pci_slot->kobj, &sn_slot_path_attr.attr); break; } return bss_hotplug_slot;} static void sn_bus_free_data(struct pci_dev *dev){ struct pci_bus *subordinate_bus; struct pci_dev *child; /* Recursively clean up sn_irq_info structs */ if (dev->subordinate) { subordinate_bus = dev->subordinate; list_for_each_entry(child, &subordinate_bus->devices, bus_list) sn_bus_free_data(child); } /* * Some drivers may use dma accesses during the * driver remove function. We release the sysdata * areas after the driver remove functions have * been called. */ sn_bus_store_sysdata(dev); sn_pci_unfixup_slot(dev);} static int sn_slot_enable(struct hotplug_slot *bss_hotplug_slot, int device_num, char **ssdt){ struct slot *slot = bss_hotplug_slot->private; struct pcibus_info *pcibus_info; struct pcibr_slot_enable_resp resp; int rc; pcibus_info = SN_PCIBUS_BUSSOFT_INFO(slot->pci_bus); /* * Power-on and initialize the slot in the SN * PCI infrastructure. */ rc = sal_pcibr_slot_enable(pcibus_info, device_num, &resp, ssdt); if (rc == PCI_SLOT_ALREADY_UP) { dev_dbg(&slot->pci_bus->self->dev, "is already active\n"); return 1; /* return 1 to user */ } if (rc == PCI_L1_ERR) { dev_dbg(&slot->pci_bus->self->dev, "L1 failure %d with message: %s", resp.resp_sub_errno, resp.resp_l1_msg); return -EPERM; } if (rc) { dev_dbg(&slot->pci_bus->self->dev, "insert failed with error %d sub-error %d\n", rc, resp.resp_sub_errno); return -EIO; } pcibus_info = SN_PCIBUS_BUSSOFT_INFO(slot->pci_bus); pcibus_info->pbi_enabled_devices |= (1 << device_num); return 0;} static int sn_slot_disable(struct hotplug_slot *bss_hotplug_slot, int device_num, int action){ struct slot *slot = bss_hotplug_slot->private; struct pcibus_info *pcibus_info; struct pcibr_slot_disable_resp resp; int rc; pcibus_info = SN_PCIBUS_BUSSOFT_INFO(slot->pci_bus); rc = sal_pcibr_slot_disable(pcibus_info, device_num, action, &resp); if ((action == PCI_REQ_SLOT_ELIGIBLE) && (rc == PCI_SLOT_ALREADY_DOWN)) { dev_dbg(&slot->pci_bus->self->dev, "Slot %s already inactive\n", slot->physical_path); return 1; /* return 1 to user */ } if ((action == PCI_REQ_SLOT_ELIGIBLE) && (rc == PCI_EMPTY_33MHZ)) { dev_dbg(&slot->pci_bus->self->dev, "Cannot remove last 33MHz card\n"); return -EPERM; } if ((action == PCI_REQ_SLOT_ELIGIBLE) && (rc == PCI_L1_ERR)) { dev_dbg(&slot->pci_bus->self->dev, "L1 failure %d with message \n%s\n", resp.resp_sub_errno, resp.resp_l1_msg); return -EPERM; } if ((action == PCI_REQ_SLOT_ELIGIBLE) && rc) { dev_dbg(&slot->pci_bus->self->dev, "remove failed with error %d sub-error %d\n", rc, resp.resp_sub_errno); return -EIO; } if ((action == PCI_REQ_SLOT_ELIGIBLE) && !rc) return 0; if ((action == PCI_REQ_SLOT_DISABLE) && !rc) { pcibus_info = SN_PCIBUS_BUSSOFT_INFO(slot->pci_bus); pcibus_info->pbi_enabled_devices &= ~(1 << device_num); dev_dbg(&slot->pci_bus->self->dev, "remove successful\n"); return 0; } if ((action == PCI_REQ_SLOT_DISABLE) && rc) { dev_dbg(&slot->pci_bus->self->dev,"remove failed rc = %d\n", rc); } return rc;} /* * Power up and configure the slot via a SAL call to PROM. * Scan slot (and any children), do any platform specific fixup, * and find device driver. */static int enable_slot(struct hotplug_slot *bss_hotplug_slot){ struct slot *slot = bss_hotplug_slot->private; struct pci_bus *new_bus = NULL; struct pci_dev *dev; int func, num_funcs; int new_ppb = 0; int rc; char *ssdt = NULL; void pcibios_fixup_device_resources(struct pci_dev *); /* Serialize the Linux PCI infrastructure */ mutex_lock(&sn_hotplug_mutex); /* * Power-on and initialize the slot in the SN * PCI infrastructure. Also, retrieve the ACPI SSDT * table for the slot (if ACPI capable PROM). */ rc = sn_slot_enable(bss_hotplug_slot, slot->device_num, &ssdt); if (rc) { mutex_unlock(&sn_hotplug_mutex); return rc; } if (ssdt) ssdt = __va(ssdt); /* Add the new SSDT for the slot to the ACPI namespace */ if (SN_ACPI_BASE_SUPPORT() && ssdt) { acpi_status ret; ret = acpi_load_table((struct acpi_table_header *)ssdt); if (ACPI_FAILURE(ret)) { printk(KERN_ERR "%s: acpi_load_table failed (0x%x)\n", __func__, ret); /* try to continue on */ } } num_funcs = pci_scan_slot(slot->pci_bus, PCI_DEVFN(slot->device_num + 1, 0)); if (!num_funcs) { dev_dbg(&slot->pci_bus->self->dev, "no device in slot\n"); mutex_unlock(&sn_hotplug_mutex); return -ENODEV; } /* * Map SN resources for all functions on the card * to the Linux PCI interface and tell the drivers * about them. */ for (func = 0; func < num_funcs; func++) { dev = pci_get_slot(slot->pci_bus, PCI_DEVFN(slot->device_num + 1, PCI_FUNC(func))); if (dev) { /* Need to do slot fixup on PPB before fixup of children * (PPB's pcidev_info needs to be in pcidev_info list * before child's SN_PCIDEV_INFO() call to setup * pdi_host_pcidev_info). */ pcibios_fixup_device_resources(dev); if (SN_ACPI_BASE_SUPPORT()) sn_acpi_slot_fixup(dev); else sn_io_slot_fixup(dev); if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE) { unsigned char sec_bus; pci_read_config_byte(dev, PCI_SECONDARY_BUS, &sec_bus); new_bus = pci_add_new_bus(dev->bus, dev, sec_bus); pci_scan_child_bus(new_bus); new_ppb = 1; } pci_dev_put(dev); } } /* * Add the slot's devices to the ACPI infrastructure */ if (SN_ACPI_BASE_SUPPORT() && ssdt) { unsigned long long adr; struct acpi_device *pdevice; struct acpi_device *device; acpi_handle phandle; acpi_handle chandle = NULL; acpi_handle rethandle; acpi_status ret; phandle = PCI_CONTROLLER(slot->pci_bus)->acpi_handle; if (acpi_bus_get_device(phandle, &pdevice)) { dev_dbg(&slot->pci_bus->self->dev, "no parent device, assuming NULL\n"); pdevice = NULL; } /* * Walk the rootbus node's immediate children looking for * the slot's device node(s). There can be more than * one for multifunction devices. */ for (;;) { rethandle = NULL; ret = acpi_get_next_object(ACPI_TYPE_DEVICE, phandle, chandle, &rethandle); if (ret == AE_NOT_FOUND || rethandle == NULL) break; chandle = rethandle; ret = acpi_evaluate_integer(chandle, METHOD_NAME__ADR, NULL, &adr); if (ACPI_SUCCESS(ret) && (adr>>16) == (slot->device_num + 1)) { ret = acpi_bus_add(&device, pdevice, chandle, ACPI_BUS_TYPE_DEVICE); if (ACPI_FAILURE(ret)) { printk(KERN_ERR "%s: acpi_bus_add " "failed (0x%x) for slot %d " "func %d\n", __func__, ret, (int)(adr>>16), (int)(adr&0xffff)); /* try to continue on */ } else { acpi_bus_start(device); } } } } /* Call the driver for the new device */ pci_bus_add_devices(slot->pci_bus); /* Call the drivers for the new devices subordinate to PPB */ if (new_ppb) pci_bus_add_devices(new_bus); mutex_unlock(&sn_hotplug_mutex); if (rc == 0) dev_dbg(&slot->pci_bus->self->dev, "insert operation successful\n"); else dev_dbg(&slot->pci_bus->self->dev, "insert operation failed rc = %d\n", rc); return rc;} static int disable_slot(struct hotplug_slot *bss_hotplug_slot){ struct slot *slot = bss_hotplug_slot->private; struct pci_dev *dev; int func; int rc; acpi_owner_id ssdt_id = 0; /* Acquire update access to the bus */ mutex_lock(&sn_hotplug_mutex); /* is it okay to bring this slot down? */ rc = sn_slot_disable(bss_hotplug_slot, slot->device_num, PCI_REQ_SLOT_ELIGIBLE);Lines 1–500 of 730. 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/* * This file is subject to the terms and conditions of the GNU General Public * License. See the file "COPYING" in the main directory of this archive * for more details. * * Copyright (C) 2005-2006 Silicon Graphics, Inc. All rights reserved. * * This work was based on the 2.4/2.6 kernel development by Dick Reigner. * Work to add BIOS PROM support was completed by Mike Habeck. */ #include <linux/init.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/pci.h> #include <linux/pci_hotplug.h> #include <linux/proc_fs.h> #include <linux/slab.h> #include <linux/types.h> #include <linux/mutex.h> #include <asm/sn/addrs.h> #include <asm/sn/geo.h> #include <asm/sn/l1.h> #include <asm/sn/module.h> #include <asm/sn/pcibr_provider.h> #include <asm/sn/pcibus_provider_defs.h> #include <asm/sn/pcidev.h> #include <asm/sn/sn_feature_sets.h> #include <asm/sn/sn_sal.h> #include <asm/sn/types.h> #include <linux/acpi.h> #include <asm/sn/acpi.h> #include "../pci.h" MODULE_LICENSE("GPL"); MODULE_AUTHOR("SGI (prarit@sgi.com, dickie@sgi.com, habeck@sgi.com)"); MODULE_DESCRIPTION("SGI Altix Hot Plug PCI Controller Driver"); /* SAL call error codes. Keep in sync with prom header io/include/pcibr.h */ #define PCI_SLOT_ALREADY_UP 2 /* slot already up */ #define PCI_SLOT_ALREADY_DOWN 3 /* slot already down */ #define PCI_L1_ERR 7 /* L1 console command error */ #define PCI_EMPTY_33MHZ 15 /* empty 33 MHz bus */ #define PCIIO_ASIC_TYPE_TIOCA 4 #define PCI_L1_QSIZE 128 /* our L1 message buffer size */ #define SN_MAX_HP_SLOTS 32 /* max hotplug slots */ #define SN_SLOT_NAME_SIZE 33 /* size of name string */ /* internal list head */ static struct list_head sn_hp_list; /* hotplug_slot struct's private pointer */ struct slot { int device_num; struct pci_bus *pci_bus; /* this struct for glue internal only */ struct hotplug_slot *hotplug_slot; struct list_head hp_list; char physical_path[SN_SLOT_NAME_SIZE]; }; struct pcibr_slot_enable_resp { int resp_sub_errno; char resp_l1_msg[PCI_L1_QSIZE + 1]; }; struct pcibr_slot_disable_resp { int resp_sub_errno; char resp_l1_msg[PCI_L1_QSIZE + 1]; }; enum sn_pci_req_e { PCI_REQ_SLOT_ELIGIBLE, PCI_REQ_SLOT_DISABLE }; static int enable_slot(struct hotplug_slot *slot); static int disable_slot(struct hotplug_slot *slot); static inline int get_power_status(struct hotplug_slot *slot, u8 *value); static struct hotplug_slot_ops sn_hotplug_slot_ops = { .enable_slot = enable_slot, .disable_slot = disable_slot, .get_power_status = get_power_status, }; static DEFINE_MUTEX(sn_hotplug_mutex); static ssize_t path_show(struct pci_slot *pci_slot, char *buf) { int retval = -ENOENT; struct slot *slot = pci_slot->hotplug->private; if (!slot) return retval; retval = sprintf (buf, "%s\n", slot->physical_path); return retval; } static struct pci_slot_attribute sn_slot_path_attr = __ATTR_RO(path); static int sn_pci_slot_valid(struct pci_bus *pci_bus, int device) { struct pcibus_info *pcibus_info; u16 busnum, segment, ioboard_type; pcibus_info = SN_PCIBUS_BUSSOFT_INFO(pci_bus); /* Check to see if this is a valid slot on 'pci_bus' */ if (!(pcibus_info->pbi_valid_devices & (1 << device))) return -EPERM; ioboard_type = sn_ioboard_to_pci_bus(pci_bus); busnum = pcibus_info->pbi_buscommon.bs_persist_busnum; segment = pci_domain_nr(pci_bus) & 0xf; /* Do not allow hotplug operations on base I/O cards */ if ((ioboard_type == L1_BRICKTYPE_IX || ioboard_type == L1_BRICKTYPE_IA) && (segment == 1 && busnum == 0 && device != 1)) return -EPERM; return 1; } static int sn_pci_bus_valid(struct pci_bus *pci_bus) { struct pcibus_info *pcibus_info; u32 asic_type; u16 ioboard_type; /* Don't register slots hanging off the TIOCA bus */ pcibus_info = SN_PCIBUS_BUSSOFT_INFO(pci_bus); asic_type = pcibus_info->pbi_buscommon.bs_asic_type; if (asic_type == PCIIO_ASIC_TYPE_TIOCA) return -EPERM; /* Only register slots in I/O Bricks that support hotplug */ ioboard_type = sn_ioboard_to_pci_bus(pci_bus); switch (ioboard_type) { case L1_BRICKTYPE_IX: case L1_BRICKTYPE_PX: case L1_BRICKTYPE_IA: case L1_BRICKTYPE_PA: case L1_BOARDTYPE_PCIX3SLOT: return 1; break; default: return -EPERM; break; } return -EIO; } static int sn_hp_slot_private_alloc(struct hotplug_slot *bss_hotplug_slot, struct pci_bus *pci_bus, int device, char *name) { struct pcibus_info *pcibus_info; struct slot *slot; pcibus_info = SN_PCIBUS_BUSSOFT_INFO(pci_bus); slot = kzalloc(sizeof(*slot), GFP_KERNEL); if (!slot) return -ENOMEM; bss_hotplug_slot->private = slot; slot->device_num = device; slot->pci_bus = pci_bus; sprintf(name, "%04x:%02x:%02x", pci_domain_nr(pci_bus), ((u16)pcibus_info->pbi_buscommon.bs_persist_busnum), device + 1); sn_generate_path(pci_bus, slot->physical_path); slot->hotplug_slot = bss_hotplug_slot; list_add(&slot->hp_list, &sn_hp_list); return 0; } static struct hotplug_slot * sn_hp_destroy(void) { struct slot *slot; struct pci_slot *pci_slot; struct hotplug_slot *bss_hotplug_slot = NULL; list_for_each_entry(slot, &sn_hp_list, hp_list) { bss_hotplug_slot = slot->hotplug_slot; pci_slot = bss_hotplug_slot->pci_slot; list_del(&((struct slot *)bss_hotplug_slot->private)-> hp_list); sysfs_remove_file(&pci_slot->kobj, &sn_slot_path_attr.attr); break; } return bss_hotplug_slot; } static void sn_bus_free_data(struct pci_dev *dev) { struct pci_bus *subordinate_bus; struct pci_dev *child; /* Recursively clean up sn_irq_info structs */ if (dev->subordinate) { subordinate_bus = dev->subordinate; list_for_each_entry(child, &subordinate_bus->devices, bus_list) sn_bus_free_data(child); } /* * Some drivers may use dma accesses during the * driver remove function. We release the sysdata * areas after the driver remove functions have * been called. */ sn_bus_store_sysdata(dev); sn_pci_unfixup_slot(dev); } static int sn_slot_enable(struct hotplug_slot *bss_hotplug_slot, int device_num, char **ssdt) { struct slot *slot = bss_hotplug_slot->private; struct pcibus_info *pcibus_info; struct pcibr_slot_enable_resp resp; int rc; pcibus_info = SN_PCIBUS_BUSSOFT_INFO(slot->pci_bus); /* * Power-on and initialize the slot in the SN * PCI infrastructure. */ rc = sal_pcibr_slot_enable(pcibus_info, device_num, &resp, ssdt); if (rc == PCI_SLOT_ALREADY_UP) { dev_dbg(&slot->pci_bus->self->dev, "is already active\n"); return 1; /* return 1 to user */ } if (rc == PCI_L1_ERR) { dev_dbg(&slot->pci_bus->self->dev, "L1 failure %d with message: %s", resp.resp_sub_errno, resp.resp_l1_msg); return -EPERM; } if (rc) { dev_dbg(&slot->pci_bus->self->dev, "insert failed with error %d sub-error %d\n", rc, resp.resp_sub_errno); return -EIO; } pcibus_info = SN_PCIBUS_BUSSOFT_INFO(slot->pci_bus); pcibus_info->pbi_enabled_devices |= (1 << device_num); return 0; } static int sn_slot_disable(struct hotplug_slot *bss_hotplug_slot, int device_num, int action) { struct slot *slot = bss_hotplug_slot->private; struct pcibus_info *pcibus_info; struct pcibr_slot_disable_resp resp; int rc; pcibus_info = SN_PCIBUS_BUSSOFT_INFO(slot->pci_bus); rc = sal_pcibr_slot_disable(pcibus_info, device_num, action, &resp); if ((action == PCI_REQ_SLOT_ELIGIBLE) && (rc == PCI_SLOT_ALREADY_DOWN)) { dev_dbg(&slot->pci_bus->self->dev, "Slot %s already inactive\n", slot->physical_path); return 1; /* return 1 to user */ } if ((action == PCI_REQ_SLOT_ELIGIBLE) && (rc == PCI_EMPTY_33MHZ)) { dev_dbg(&slot->pci_bus->self->dev, "Cannot remove last 33MHz card\n"); return -EPERM; } if ((action == PCI_REQ_SLOT_ELIGIBLE) && (rc == PCI_L1_ERR)) { dev_dbg(&slot->pci_bus->self->dev, "L1 failure %d with message \n%s\n", resp.resp_sub_errno, resp.resp_l1_msg); return -EPERM; } if ((action == PCI_REQ_SLOT_ELIGIBLE) && rc) { dev_dbg(&slot->pci_bus->self->dev, "remove failed with error %d sub-error %d\n", rc, resp.resp_sub_errno); return -EIO; } if ((action == PCI_REQ_SLOT_ELIGIBLE) && !rc) return 0; if ((action == PCI_REQ_SLOT_DISABLE) && !rc) { pcibus_info = SN_PCIBUS_BUSSOFT_INFO(slot->pci_bus); pcibus_info->pbi_enabled_devices &= ~(1 << device_num); dev_dbg(&slot->pci_bus->self->dev, "remove successful\n"); return 0; } if ((action == PCI_REQ_SLOT_DISABLE) && rc) { dev_dbg(&slot->pci_bus->self->dev,"remove failed rc = %d\n", rc); } return rc; } /* * Power up and configure the slot via a SAL call to PROM. * Scan slot (and any children), do any platform specific fixup, * and find device driver. */ static int enable_slot(struct hotplug_slot *bss_hotplug_slot) { struct slot *slot = bss_hotplug_slot->private; struct pci_bus *new_bus = NULL; struct pci_dev *dev; int func, num_funcs; int new_ppb = 0; int rc; char *ssdt = NULL; void pcibios_fixup_device_resources(struct pci_dev *); /* Serialize the Linux PCI infrastructure */ mutex_lock(&sn_hotplug_mutex); /* * Power-on and initialize the slot in the SN * PCI infrastructure. Also, retrieve the ACPI SSDT * table for the slot (if ACPI capable PROM). */ rc = sn_slot_enable(bss_hotplug_slot, slot->device_num, &ssdt); if (rc) { mutex_unlock(&sn_hotplug_mutex); return rc; } if (ssdt) ssdt = __va(ssdt); /* Add the new SSDT for the slot to the ACPI namespace */ if (SN_ACPI_BASE_SUPPORT() && ssdt) { acpi_status ret; ret = acpi_load_table((struct acpi_table_header *)ssdt); if (ACPI_FAILURE(ret)) { printk(KERN_ERR "%s: acpi_load_table failed (0x%x)\n", __func__, ret); /* try to continue on */ } } num_funcs = pci_scan_slot(slot->pci_bus, PCI_DEVFN(slot->device_num + 1, 0)); if (!num_funcs) { dev_dbg(&slot->pci_bus->self->dev, "no device in slot\n"); mutex_unlock(&sn_hotplug_mutex); return -ENODEV; } /* * Map SN resources for all functions on the card * to the Linux PCI interface and tell the drivers * about them. */ for (func = 0; func < num_funcs; func++) { dev = pci_get_slot(slot->pci_bus, PCI_DEVFN(slot->device_num + 1, PCI_FUNC(func))); if (dev) { /* Need to do slot fixup on PPB before fixup of children * (PPB's pcidev_info needs to be in pcidev_info list * before child's SN_PCIDEV_INFO() call to setup * pdi_host_pcidev_info). */ pcibios_fixup_device_resources(dev); if (SN_ACPI_BASE_SUPPORT()) sn_acpi_slot_fixup(dev); else sn_io_slot_fixup(dev); if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE) { unsigned char sec_bus; pci_read_config_byte(dev, PCI_SECONDARY_BUS, &sec_bus); new_bus = pci_add_new_bus(dev->bus, dev, sec_bus); pci_scan_child_bus(new_bus); new_ppb = 1; } pci_dev_put(dev); } } /* * Add the slot's devices to the ACPI infrastructure */ if (SN_ACPI_BASE_SUPPORT() && ssdt) { unsigned long long adr; struct acpi_device *pdevice; struct acpi_device *device; acpi_handle phandle; acpi_handle chandle = NULL; acpi_handle rethandle; acpi_status ret; phandle = PCI_CONTROLLER(slot->pci_bus)->acpi_handle; if (acpi_bus_get_device(phandle, &pdevice)) { dev_dbg(&slot->pci_bus->self->dev, "no parent device, assuming NULL\n"); pdevice = NULL; } /* * Walk the rootbus node's immediate children looking for * the slot's device node(s). There can be more than * one for multifunction devices. */ for (;;) { rethandle = NULL; ret = acpi_get_next_object(ACPI_TYPE_DEVICE, phandle, chandle, &rethandle); if (ret == AE_NOT_FOUND || rethandle == NULL) break; chandle = rethandle; ret = acpi_evaluate_integer(chandle, METHOD_NAME__ADR, NULL, &adr); if (ACPI_SUCCESS(ret) && (adr>>16) == (slot->device_num + 1)) { ret = acpi_bus_add(&device, pdevice, chandle, ACPI_BUS_TYPE_DEVICE); if (ACPI_FAILURE(ret)) { printk(KERN_ERR "%s: acpi_bus_add " "failed (0x%x) for slot %d " "func %d\n", __func__, ret, (int)(adr>>16), (int)(adr&0xffff)); /* try to continue on */ } else { acpi_bus_start(device); } } } } /* Call the driver for the new device */ pci_bus_add_devices(slot->pci_bus); /* Call the drivers for the new devices subordinate to PPB */ if (new_ppb) pci_bus_add_devices(new_bus); mutex_unlock(&sn_hotplug_mutex); if (rc == 0) dev_dbg(&slot->pci_bus->self->dev, "insert operation successful\n"); else dev_dbg(&slot->pci_bus->self->dev, "insert operation failed rc = %d\n", rc); return rc; } static int disable_slot(struct hotplug_slot *bss_hotplug_slot) { struct slot *slot = bss_hotplug_slot->private; struct pci_dev *dev; int func; int rc; acpi_owner_id ssdt_id = 0; /* Acquire update access to the bus */ mutex_lock(&sn_hotplug_mutex); /* is it okay to bring this slot down? */ rc = sn_slot_disable(bss_hotplug_slot, slot->device_num, PCI_REQ_SLOT_ELIGIBLE);