/* * 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 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/proc_fs.h>#include <linux/types.h> #include <asm/sn/addrs.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_sal.h>#include <asm/sn/types.h> #include "../pci.h"#include "pci_hotplug.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"); #define PCIIO_ASIC_TYPE_TIOCA 4#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 PCI_L1_QSIZE 128 /* our L1 message buffer size */#define SN_MAX_HP_SLOTS 32 /* max number of hotplug slots */#define SGI_HOTPLUG_PROM_REV 0x0420 /* Min. required PROM version */ /* 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;}; 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 int get_power_status(struct hotplug_slot *slot, u8 *value); static struct hotplug_slot_ops sn_hotplug_slot_ops = { .owner = THIS_MODULE, .enable_slot = enable_slot, .disable_slot = disable_slot, .get_power_status = get_power_status,}; static DECLARE_MUTEX(sn_hotplug_sem); static int sn_pci_slot_valid(struct pci_bus *pci_bus, int device){ struct pcibus_info *pcibus_info; int bricktype; int bus_num; 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; bricktype = MODULE_GET_BTYPE(pcibus_info->pbi_moduleid); bus_num = pcibus_info->pbi_buscommon.bs_persist_busnum & 0xf; /* Do not allow hotplug operations on base I/O cards */ if ((bricktype == L1_BRICKTYPE_IX || bricktype == L1_BRICKTYPE_IA) && (bus_num == 1 && device != 1)) return -EPERM; return 1;} static int sn_pci_bus_valid(struct pci_bus *pci_bus){ struct pcibus_info *pcibus_info; int asic_type; int bricktype; pcibus_info = SN_PCIBUS_BUSSOFT_INFO(pci_bus); /* Don't register slots hanging off the TIOCA 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 */ bricktype = MODULE_GET_BTYPE(pcibus_info->pbi_moduleid); switch (bricktype) { case L1_BRICKTYPE_IX: case L1_BRICKTYPE_PX: case L1_BRICKTYPE_IA: case L1_BRICKTYPE_PA: 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){ struct pcibus_info *pcibus_info; struct slot *slot; pcibus_info = SN_PCIBUS_BUSSOFT_INFO(pci_bus); bss_hotplug_slot->private = kcalloc(1, sizeof(struct slot), GFP_KERNEL); if (!bss_hotplug_slot->private) return -ENOMEM; slot = (struct slot *)bss_hotplug_slot->private; bss_hotplug_slot->name = kmalloc(33, GFP_KERNEL); if (!bss_hotplug_slot->name) { kfree(bss_hotplug_slot->private); return -ENOMEM; } slot->device_num = device; slot->pci_bus = pci_bus; sprintf(bss_hotplug_slot->name, "module_%c%c%c%c%.2d_b_%d_s_%d", '0'+RACK_GET_CLASS(MODULE_GET_RACK(pcibus_info->pbi_moduleid)), '0'+RACK_GET_GROUP(MODULE_GET_RACK(pcibus_info->pbi_moduleid)), '0'+RACK_GET_NUM(MODULE_GET_RACK(pcibus_info->pbi_moduleid)), MODULE_GET_BTCHAR(pcibus_info->pbi_moduleid), MODULE_GET_BPOS(pcibus_info->pbi_moduleid), ((int)pcibus_info->pbi_buscommon.bs_persist_busnum) & 0xf, device + 1); 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 list_head *list; struct hotplug_slot *bss_hotplug_slot = NULL; list_for_each(list, &sn_hp_list) { slot = list_entry(list, struct slot, hp_list); bss_hotplug_slot = slot->hotplug_slot; list_del(&((struct slot *)bss_hotplug_slot->private)-> hp_list); break; } return bss_hotplug_slot;} static void sn_bus_alloc_data(struct pci_dev *dev){ struct list_head *node; struct pci_bus *subordinate_bus; struct pci_dev *child; sn_pci_fixup_slot(dev); /* Recursively sets up the sn_irq_info structs */ if (dev->subordinate) { subordinate_bus = dev->subordinate; list_for_each(node, &subordinate_bus->devices) { child = list_entry(node, struct pci_dev, bus_list); sn_bus_alloc_data(child); } }} static void sn_bus_free_data(struct pci_dev *dev){ struct list_head *node; 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(node, &subordinate_bus->devices) { child = list_entry(node, struct pci_dev, bus_list); sn_bus_free_data(child); } } sn_pci_unfixup_slot(dev);} static u8 sn_power_status_get(struct hotplug_slot *bss_hotplug_slot){ struct slot *slot = (struct slot *)bss_hotplug_slot->private; struct pcibus_info *pcibus_info; u8 retval; pcibus_info = SN_PCIBUS_BUSSOFT_INFO(slot->pci_bus); retval = pcibus_info->pbi_enabled_devices & (1 << slot->device_num); return retval ? 1 : 0;} static void sn_slot_mark_enable(struct hotplug_slot *bss_hotplug_slot, int device_num){ struct slot *slot = (struct slot *)bss_hotplug_slot->private; struct pcibus_info *pcibus_info; pcibus_info = SN_PCIBUS_BUSSOFT_INFO(slot->pci_bus); pcibus_info->pbi_enabled_devices |= (1 << device_num);} static void sn_slot_mark_disable(struct hotplug_slot *bss_hotplug_slot, int device_num){ struct slot *slot = (struct slot *)bss_hotplug_slot->private; struct pcibus_info *pcibus_info; pcibus_info = SN_PCIBUS_BUSSOFT_INFO(slot->pci_bus); pcibus_info->pbi_enabled_devices &= ~(1 << device_num);} static int sn_slot_enable(struct hotplug_slot *bss_hotplug_slot, int device_num){ struct slot *slot = (struct 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); if (rc == PCI_SLOT_ALREADY_UP) { dev_dbg(slot->pci_bus->self, "is already active\n"); return -EPERM; } if (rc == PCI_L1_ERR) { dev_dbg(slot->pci_bus->self, "L1 failure %d with message: %s", resp.resp_sub_errno, resp.resp_l1_msg); return -EPERM; } if (rc) { dev_dbg(slot->pci_bus->self, "insert failed with error %d sub-error %d\n", rc, resp.resp_sub_errno); return -EIO; } sn_slot_mark_enable(bss_hotplug_slot, device_num); return 0;} static int sn_slot_disable(struct hotplug_slot *bss_hotplug_slot, int device_num, int action){ struct slot *slot = (struct 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, "Slot %s already inactive\n"); return -ENODEV; } if (action == PCI_REQ_SLOT_ELIGIBLE && rc == PCI_EMPTY_33MHZ) { dev_dbg(slot->pci_bus->self, "Cannot remove last 33MHz card\n"); return -EPERM; } if (action == PCI_REQ_SLOT_ELIGIBLE && rc == PCI_L1_ERR) { dev_dbg(slot->pci_bus->self, "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, "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) { sn_slot_mark_disable(bss_hotplug_slot, device_num); dev_dbg(slot->pci_bus->self, "remove successful\n"); return 0; } if (action == PCI_REQ_SLOT_DISABLE && rc) { dev_dbg(slot->pci_bus->self,"remove failed rc = %d\n", rc); return rc; } return rc;} static int enable_slot(struct hotplug_slot *bss_hotplug_slot){ struct slot *slot = (struct 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; /* Serialize the Linux PCI infrastructure */ down(&sn_hotplug_sem); /* * Power-on and initialize the slot in the SN * PCI infrastructure. */ rc = sn_slot_enable(bss_hotplug_slot, slot->device_num); if (rc) { up(&sn_hotplug_sem); return rc; } num_funcs = pci_scan_slot(slot->pci_bus, PCI_DEVFN(slot->device_num+1, PCI_FUNC(0))); if (!num_funcs) { dev_dbg(slot->pci_bus->self, "no device in slot\n"); up(&sn_hotplug_sem); return -ENODEV; } sn_pci_controller_fixup(pci_domain_nr(slot->pci_bus), slot->pci_bus->number, slot->pci_bus); /* * 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) { 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); sn_pci_controller_fixup(pci_domain_nr(new_bus), new_bus->number, new_bus); new_ppb = 1; } sn_bus_alloc_data(dev); pci_dev_put(dev); } } /* 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); up(&sn_hotplug_sem); if (rc == 0) dev_dbg(slot->pci_bus->self, "insert operation successful\n"); else dev_dbg(slot->pci_bus->self, "insert operation failed rc = %d\n", rc); return rc;} static int disable_slot(struct hotplug_slot *bss_hotplug_slot){ struct slot *slot = (struct slot *)bss_hotplug_slot->private; struct pci_dev *dev; int func; int rc; /* Acquire update access to the bus */ down(&sn_hotplug_sem); /* is it okay to bring this slot down? */ rc = sn_slot_disable(bss_hotplug_slot, slot->device_num, PCI_REQ_SLOT_ELIGIBLE); if (rc) goto leaving; /* Free the SN resources assigned to the Linux device.*/ for (func = 0; func < 8; func++) { dev = pci_get_slot(slot->pci_bus, PCI_DEVFN(slot->device_num+1, PCI_FUNC(func))); if (dev) { /* * 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_bus_free_data(dev); pci_remove_bus_device(dev); pci_dev_put(dev); } } /* free the collected sysdata pointers */ sn_bus_free_sysdata(); /* Deactivate slot */ rc = sn_slot_disable(bss_hotplug_slot, slot->device_num, PCI_REQ_SLOT_DISABLE); leaving: /* Release the bus lock */ up(&sn_hotplug_sem); return rc;} static int get_power_status(struct hotplug_slot *bss_hotplug_slot, u8 *value){ down(&sn_hotplug_sem); *value = sn_power_status_get(bss_hotplug_slot); up(&sn_hotplug_sem); return 0;} static void sn_release_slot(struct hotplug_slot *bss_hotplug_slot){ kfree(bss_hotplug_slot->info); kfree(bss_hotplug_slot->name); kfree(bss_hotplug_slot->private); kfree(bss_hotplug_slot);} static int sn_hotplug_slot_register(struct pci_bus *pci_bus){ int device; struct hotplug_slot *bss_hotplug_slot; int rc = 0;Lines 1–500 of 611. Load more
/* * 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 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/proc_fs.h> #include <linux/types.h> #include <asm/sn/addrs.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_sal.h> #include <asm/sn/types.h> #include "../pci.h" #include "pci_hotplug.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"); #define PCIIO_ASIC_TYPE_TIOCA 4 #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 PCI_L1_QSIZE 128 /* our L1 message buffer size */ #define SN_MAX_HP_SLOTS 32 /* max number of hotplug slots */ #define SGI_HOTPLUG_PROM_REV 0x0420 /* Min. required PROM version */ /* 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; }; 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 int get_power_status(struct hotplug_slot *slot, u8 *value); static struct hotplug_slot_ops sn_hotplug_slot_ops = { .owner = THIS_MODULE, .enable_slot = enable_slot, .disable_slot = disable_slot, .get_power_status = get_power_status, }; static DECLARE_MUTEX(sn_hotplug_sem); static int sn_pci_slot_valid(struct pci_bus *pci_bus, int device) { struct pcibus_info *pcibus_info; int bricktype; int bus_num; 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; bricktype = MODULE_GET_BTYPE(pcibus_info->pbi_moduleid); bus_num = pcibus_info->pbi_buscommon.bs_persist_busnum & 0xf; /* Do not allow hotplug operations on base I/O cards */ if ((bricktype == L1_BRICKTYPE_IX || bricktype == L1_BRICKTYPE_IA) && (bus_num == 1 && device != 1)) return -EPERM; return 1; } static int sn_pci_bus_valid(struct pci_bus *pci_bus) { struct pcibus_info *pcibus_info; int asic_type; int bricktype; pcibus_info = SN_PCIBUS_BUSSOFT_INFO(pci_bus); /* Don't register slots hanging off the TIOCA 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 */ bricktype = MODULE_GET_BTYPE(pcibus_info->pbi_moduleid); switch (bricktype) { case L1_BRICKTYPE_IX: case L1_BRICKTYPE_PX: case L1_BRICKTYPE_IA: case L1_BRICKTYPE_PA: 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) { struct pcibus_info *pcibus_info; struct slot *slot; pcibus_info = SN_PCIBUS_BUSSOFT_INFO(pci_bus); bss_hotplug_slot->private = kcalloc(1, sizeof(struct slot), GFP_KERNEL); if (!bss_hotplug_slot->private) return -ENOMEM; slot = (struct slot *)bss_hotplug_slot->private; bss_hotplug_slot->name = kmalloc(33, GFP_KERNEL); if (!bss_hotplug_slot->name) { kfree(bss_hotplug_slot->private); return -ENOMEM; } slot->device_num = device; slot->pci_bus = pci_bus; sprintf(bss_hotplug_slot->name, "module_%c%c%c%c%.2d_b_%d_s_%d", '0'+RACK_GET_CLASS(MODULE_GET_RACK(pcibus_info->pbi_moduleid)), '0'+RACK_GET_GROUP(MODULE_GET_RACK(pcibus_info->pbi_moduleid)), '0'+RACK_GET_NUM(MODULE_GET_RACK(pcibus_info->pbi_moduleid)), MODULE_GET_BTCHAR(pcibus_info->pbi_moduleid), MODULE_GET_BPOS(pcibus_info->pbi_moduleid), ((int)pcibus_info->pbi_buscommon.bs_persist_busnum) & 0xf, device + 1); 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 list_head *list; struct hotplug_slot *bss_hotplug_slot = NULL; list_for_each(list, &sn_hp_list) { slot = list_entry(list, struct slot, hp_list); bss_hotplug_slot = slot->hotplug_slot; list_del(&((struct slot *)bss_hotplug_slot->private)-> hp_list); break; } return bss_hotplug_slot; } static void sn_bus_alloc_data(struct pci_dev *dev) { struct list_head *node; struct pci_bus *subordinate_bus; struct pci_dev *child; sn_pci_fixup_slot(dev); /* Recursively sets up the sn_irq_info structs */ if (dev->subordinate) { subordinate_bus = dev->subordinate; list_for_each(node, &subordinate_bus->devices) { child = list_entry(node, struct pci_dev, bus_list); sn_bus_alloc_data(child); } } } static void sn_bus_free_data(struct pci_dev *dev) { struct list_head *node; 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(node, &subordinate_bus->devices) { child = list_entry(node, struct pci_dev, bus_list); sn_bus_free_data(child); } } sn_pci_unfixup_slot(dev); } static u8 sn_power_status_get(struct hotplug_slot *bss_hotplug_slot) { struct slot *slot = (struct slot *)bss_hotplug_slot->private; struct pcibus_info *pcibus_info; u8 retval; pcibus_info = SN_PCIBUS_BUSSOFT_INFO(slot->pci_bus); retval = pcibus_info->pbi_enabled_devices & (1 << slot->device_num); return retval ? 1 : 0; } static void sn_slot_mark_enable(struct hotplug_slot *bss_hotplug_slot, int device_num) { struct slot *slot = (struct slot *)bss_hotplug_slot->private; struct pcibus_info *pcibus_info; pcibus_info = SN_PCIBUS_BUSSOFT_INFO(slot->pci_bus); pcibus_info->pbi_enabled_devices |= (1 << device_num); } static void sn_slot_mark_disable(struct hotplug_slot *bss_hotplug_slot, int device_num) { struct slot *slot = (struct slot *)bss_hotplug_slot->private; struct pcibus_info *pcibus_info; pcibus_info = SN_PCIBUS_BUSSOFT_INFO(slot->pci_bus); pcibus_info->pbi_enabled_devices &= ~(1 << device_num); } static int sn_slot_enable(struct hotplug_slot *bss_hotplug_slot, int device_num) { struct slot *slot = (struct 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); if (rc == PCI_SLOT_ALREADY_UP) { dev_dbg(slot->pci_bus->self, "is already active\n"); return -EPERM; } if (rc == PCI_L1_ERR) { dev_dbg(slot->pci_bus->self, "L1 failure %d with message: %s", resp.resp_sub_errno, resp.resp_l1_msg); return -EPERM; } if (rc) { dev_dbg(slot->pci_bus->self, "insert failed with error %d sub-error %d\n", rc, resp.resp_sub_errno); return -EIO; } sn_slot_mark_enable(bss_hotplug_slot, device_num); return 0; } static int sn_slot_disable(struct hotplug_slot *bss_hotplug_slot, int device_num, int action) { struct slot *slot = (struct 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, "Slot %s already inactive\n"); return -ENODEV; } if (action == PCI_REQ_SLOT_ELIGIBLE && rc == PCI_EMPTY_33MHZ) { dev_dbg(slot->pci_bus->self, "Cannot remove last 33MHz card\n"); return -EPERM; } if (action == PCI_REQ_SLOT_ELIGIBLE && rc == PCI_L1_ERR) { dev_dbg(slot->pci_bus->self, "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, "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) { sn_slot_mark_disable(bss_hotplug_slot, device_num); dev_dbg(slot->pci_bus->self, "remove successful\n"); return 0; } if (action == PCI_REQ_SLOT_DISABLE && rc) { dev_dbg(slot->pci_bus->self,"remove failed rc = %d\n", rc); return rc; } return rc; } static int enable_slot(struct hotplug_slot *bss_hotplug_slot) { struct slot *slot = (struct 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; /* Serialize the Linux PCI infrastructure */ down(&sn_hotplug_sem); /* * Power-on and initialize the slot in the SN * PCI infrastructure. */ rc = sn_slot_enable(bss_hotplug_slot, slot->device_num); if (rc) { up(&sn_hotplug_sem); return rc; } num_funcs = pci_scan_slot(slot->pci_bus, PCI_DEVFN(slot->device_num+1, PCI_FUNC(0))); if (!num_funcs) { dev_dbg(slot->pci_bus->self, "no device in slot\n"); up(&sn_hotplug_sem); return -ENODEV; } sn_pci_controller_fixup(pci_domain_nr(slot->pci_bus), slot->pci_bus->number, slot->pci_bus); /* * 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) { 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); sn_pci_controller_fixup(pci_domain_nr(new_bus), new_bus->number, new_bus); new_ppb = 1; } sn_bus_alloc_data(dev); pci_dev_put(dev); } } /* 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); up(&sn_hotplug_sem); if (rc == 0) dev_dbg(slot->pci_bus->self, "insert operation successful\n"); else dev_dbg(slot->pci_bus->self, "insert operation failed rc = %d\n", rc); return rc; } static int disable_slot(struct hotplug_slot *bss_hotplug_slot) { struct slot *slot = (struct slot *)bss_hotplug_slot->private; struct pci_dev *dev; int func; int rc; /* Acquire update access to the bus */ down(&sn_hotplug_sem); /* is it okay to bring this slot down? */ rc = sn_slot_disable(bss_hotplug_slot, slot->device_num, PCI_REQ_SLOT_ELIGIBLE); if (rc) goto leaving; /* Free the SN resources assigned to the Linux device.*/ for (func = 0; func < 8; func++) { dev = pci_get_slot(slot->pci_bus, PCI_DEVFN(slot->device_num+1, PCI_FUNC(func))); if (dev) { /* * 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_bus_free_data(dev); pci_remove_bus_device(dev); pci_dev_put(dev); } } /* free the collected sysdata pointers */ sn_bus_free_sysdata(); /* Deactivate slot */ rc = sn_slot_disable(bss_hotplug_slot, slot->device_num, PCI_REQ_SLOT_DISABLE); leaving: /* Release the bus lock */ up(&sn_hotplug_sem); return rc; } static int get_power_status(struct hotplug_slot *bss_hotplug_slot, u8 *value) { down(&sn_hotplug_sem); *value = sn_power_status_get(bss_hotplug_slot); up(&sn_hotplug_sem); return 0; } static void sn_release_slot(struct hotplug_slot *bss_hotplug_slot) { kfree(bss_hotplug_slot->info); kfree(bss_hotplug_slot->name); kfree(bss_hotplug_slot->private); kfree(bss_hotplug_slot); } static int sn_hotplug_slot_register(struct pci_bus *pci_bus) { int device; struct hotplug_slot *bss_hotplug_slot; int rc = 0;