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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 | // SPDX-License-Identifier: GPL-2.0+ /* * RPA Virtual I/O device functions * Copyright (C) 2004 Linda Xie <lxie@us.ibm.com> * * All rights reserved. * * Send feedback to <lxie@us.ibm.com> * */ #include <linux/kernel.h> #include <linux/module.h> #include <linux/sysfs.h> #include <linux/pci.h> #include <linux/string.h> #include <linux/slab.h> #include <asm/rtas.h> #include "rpaphp.h" /* free up the memory used by a slot */ void dealloc_slot_struct(struct slot *slot) { kfree(slot->hotplug_slot->info); kfree(slot->name); kfree(slot->hotplug_slot); kfree(slot); } struct slot *alloc_slot_struct(struct device_node *dn, int drc_index, char *drc_name, int power_domain) { struct slot *slot; slot = kzalloc(sizeof(struct slot), GFP_KERNEL); if (!slot) goto error_nomem; slot->hotplug_slot = kzalloc(sizeof(struct hotplug_slot), GFP_KERNEL); if (!slot->hotplug_slot) goto error_slot; slot->hotplug_slot->info = kzalloc(sizeof(struct hotplug_slot_info), GFP_KERNEL); if (!slot->hotplug_slot->info) goto error_hpslot; slot->name = kstrdup(drc_name, GFP_KERNEL); if (!slot->name) goto error_info; slot->dn = dn; slot->index = drc_index; slot->power_domain = power_domain; slot->hotplug_slot->private = slot; slot->hotplug_slot->ops = &rpaphp_hotplug_slot_ops; return (slot); error_info: kfree(slot->hotplug_slot->info); error_hpslot: kfree(slot->hotplug_slot); error_slot: kfree(slot); error_nomem: return NULL; } static int is_registered(struct slot *slot) { struct slot *tmp_slot; list_for_each_entry(tmp_slot, &rpaphp_slot_head, rpaphp_slot_list) { if (!strcmp(tmp_slot->name, slot->name)) return 1; } return 0; } int rpaphp_deregister_slot(struct slot *slot) { int retval = 0; struct hotplug_slot *php_slot = slot->hotplug_slot; dbg("%s - Entry: deregistering slot=%s\n", __func__, slot->name); list_del(&slot->rpaphp_slot_list); pci_hp_deregister(php_slot); dealloc_slot_struct(slot); dbg("%s - Exit: rc[%d]\n", __func__, retval); return retval; } EXPORT_SYMBOL_GPL(rpaphp_deregister_slot); int rpaphp_register_slot(struct slot *slot) { struct hotplug_slot *php_slot = slot->hotplug_slot; struct device_node *child; u32 my_index; int retval; int slotno = -1; dbg("%s registering slot:path[%pOF] index[%x], name[%s] pdomain[%x] type[%d]\n", __func__, slot->dn, slot->index, slot->name, slot->power_domain, slot->type); /* should not try to register the same slot twice */ if (is_registered(slot)) { err("rpaphp_register_slot: slot[%s] is already registered\n", slot->name); return -EAGAIN; } for_each_child_of_node(slot->dn, child) { retval = of_property_read_u32(child, "ibm,my-drc-index", &my_index); if (my_index == slot->index) { slotno = PCI_SLOT(PCI_DN(child)->devfn); of_node_put(child); break; } } retval = pci_hp_register(php_slot, slot->bus, slotno, slot->name); if (retval) { err("pci_hp_register failed with error %d\n", retval); return retval; } /* add slot to our internal list */ list_add(&slot->rpaphp_slot_list, &rpaphp_slot_head); info("Slot [%s] registered\n", slot->name); return 0; } |