/* * Standard Hot Plug Controller Driver * * Copyright (C) 1995,2001 Compaq Computer Corporation * Copyright (C) 2001 Greg Kroah-Hartman (greg@kroah.com) * Copyright (C) 2001 IBM Corp. * Copyright (C) 2003-2004 Intel Corporation * * 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 , * */ #include #include #include #include #include #include #include #include #include #include #include #include "shpchp.h" /* Global variables */ int shpchp_debug; int shpchp_poll_mode; int shpchp_poll_time; struct controller *shpchp_ctrl_list; /* = NULL */ struct pci_func *shpchp_slot_list[256]; #define DRIVER_VERSION "0.4" #define DRIVER_AUTHOR "Dan Zink , Greg Kroah-Hartman , Dely Sy " #define DRIVER_DESC "Standard Hot Plug PCI Controller Driver" MODULE_AUTHOR(DRIVER_AUTHOR); MODULE_DESCRIPTION(DRIVER_DESC); MODULE_LICENSE("GPL"); module_param(shpchp_debug, bool, 0644); module_param(shpchp_poll_mode, bool, 0644); module_param(shpchp_poll_time, int, 0644); MODULE_PARM_DESC(shpchp_debug, "Debugging mode enabled or not"); MODULE_PARM_DESC(shpchp_poll_mode, "Using polling mechanism for hot-plug events or not"); MODULE_PARM_DESC(shpchp_poll_time, "Polling mechanism frequency, in seconds"); #define SHPC_MODULE_NAME "shpchp" static int shpc_start_thread (void); static int set_attention_status (struct hotplug_slot *slot, u8 value); 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 int get_attention_status (struct hotplug_slot *slot, u8 *value); static int get_latch_status (struct hotplug_slot *slot, u8 *value); static int get_adapter_status (struct hotplug_slot *slot, u8 *value); static int get_max_bus_speed (struct hotplug_slot *slot, enum pci_bus_speed *value); static int get_cur_bus_speed (struct hotplug_slot *slot, enum pci_bus_speed *value); static struct hotplug_slot_ops shpchp_hotplug_slot_ops = { .owner = THIS_MODULE, .set_attention_status = set_attention_status, .enable_slot = enable_slot, .disable_slot = disable_slot, .get_power_status = get_power_status, .get_attention_status = get_attention_status, .get_latch_status = get_latch_status, .get_adapter_status = get_adapter_status, .get_max_bus_speed = get_max_bus_speed, .get_cur_bus_speed = get_cur_bus_speed, }; /** * release_slot - free up the memory used by a slot * @hotplug_slot: slot to free */ static void release_slot(struct hotplug_slot *hotplug_slot) { struct slot *slot = hotplug_slot->private; dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name); kfree(slot->hotplug_slot->info); kfree(slot->hotplug_slot->name); kfree(slot->hotplug_slot); kfree(slot); } static int init_slots(struct controller *ctrl) { struct slot *new_slot; u8 number_of_slots; u8 slot_device; u32 slot_number, sun; int result = -ENOMEM; dbg("%s\n",__FUNCTION__); number_of_slots = ctrl->num_slots; slot_device = ctrl->slot_device_offset; slot_number = ctrl->first_slot; while (number_of_slots) { new_slot = (struct slot *) kmalloc(sizeof(struct slot), GFP_KERNEL); if (!new_slot) goto error; memset(new_slot, 0, sizeof(struct slot)); new_slot->hotplug_slot = kmalloc (sizeof (struct hotplug_slot), GFP_KERNEL); if (!new_slot->hotplug_slot) goto error_slot; memset(new_slot->hotplug_slot, 0, sizeof (struct hotplug_slot)); new_slot->hotplug_slot->info = kmalloc (sizeof (struct hotplug_slot_info), GFP_KERNEL); if (!new_slot->hotplug_slot->info) goto error_hpslot; memset(new_slot->hotplug_slot->info, 0, sizeof (struct hotplug_slot_info)); new_slot->hotplug_slot->name = kmalloc (SLOT_NAME_SIZE, GFP_KERNEL); if (!new_slot->hotplug_slot->name) goto error_info; new_slot->magic = SLOT_MAGIC; new_slot->ctrl = ctrl; new_slot->bus = ctrl->slot_bus; new_slot->device = slot_device; new_slot->hpc_ops = ctrl->hpc_ops; if (shpchprm_get_physical_slot_number(ctrl, &sun, new_slot->bus, new_slot->device)) goto error_name; new_slot->number = sun; new_slot->hp_slot = slot_device - ctrl->slot_device_offset; /* register this slot with the hotplug pci core */ new_slot->hotplug_slot->private = new_slot; new_slot->hotplug_slot->release = &release_slot; make_slot_name(new_slot->hotplug_slot->name, SLOT_NAME_SIZE, new_slot); new_slot->hotplug_slot->ops = &shpchp_hotplug_slot_ops; new_slot->hpc_ops->get_power_status(new_slot, &(new_slot->hotplug_slot->info->power_status)); new_slot->hpc_ops->get_attention_status(new_slot, &(new_slot->hotplug_slot->info->attention_status)); new_slot->hpc_ops->get_latch_status(new_slot, &(new_slot->hotplug_slot->info->latch_status)); new_slot->hpc_ops->get_adapter_status(new_slot, &(new_slot->hotplug_slot->info->adapter_status)); dbg("Registering bus=%x dev=%x hp_slot=%x sun=%x slot_device_offset=%x\n", new_slot->bus, new_slot->device, new_slot->hp_slot, new_slot->number, ctrl->slot_device_offset); result = pci_hp_register (new_slot->hotplug_slot); if (result) { err ("pci_hp_register failed with error %d\n", result); goto error_name; } new_slot->next = ctrl->slot; ctrl->slot = new_slot; number_of_slots--; slot_device++; slot_number += ctrl->slot_num_inc; } return 0; error_name: kfree(new_slot->hotplug_slot->name); error_info: kfree(new_slot->hotplug_slot->info); error_hpslot: kfree(new_slot->hotplug_slot); error_slot: kfree(new_slot); error: return result; } static void cleanup_slots(struct controller *ctrl) { struct slot *old_slot, *next_slot; old_slot = ctrl->slot; ctrl->slot = NULL; while (old_slot) { next_slot = old_slot->next; pci_hp_deregister(old_slot->hotplug_slot); old_slot = next_slot; } } static int get_ctlr_slot_config(struct controller *ctrl) { int num_ctlr_slots; int first_device_num; int physical_slot_num; int updown; int rc; int flags; rc = shpc_get_ctlr_slot_config(ctrl, &num_ctlr_slots, &first_device_num, &physical_slot_num, &updown, &flags); if (rc) { err("%s: get_ctlr_slot_config fail for b:d (%x:%x)\n", __FUNCTION__, ctrl->bus, ctrl->device); return -1; } ctrl->num_slots = num_ctlr_slots; ctrl->slot_device_offset = first_device_num; ctrl->first_slot = physical_slot_num; ctrl->slot_num_inc = updown; /* either -1 or 1 */ dbg("%s: num_slot(0x%x) 1st_dev(0x%x) psn(0x%x) updown(%d) for b:d (%x:%x)\n", __FUNCTION__, num_ctlr_slots, first_device_num, physical_slot_num, updown, ctrl->bus, ctrl->device); return 0; } /* * set_attention_status - Turns the Amber LED for a slot on, off or blink */ static int set_attention_status (struct hotplug_slot *hotplug_slot, u8 status) { struct slot *slot = get_slot (hotplug_slot, __FUNCTION__); dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name); hotplug_slot->info->attention_status = status; slot->hpc_ops->set_attention_status(slot, status); return 0; } static int enable_slot (struct hotplug_slot *hotplug_slot) { struct slot *slot = get_slot (hotplug_slot, __FUNCTION__); dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name); return shpchp_enable_slot(slot); } static int disable_slot (struct hotplug_slot *hotplug_slot) { struct slot *slot = get_slot (hotplug_slot, __FUNCTION__); dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name); return shpchp_disable_slot(slot); } static int get_power_status (struct hotplug_slot *hotplug_slot, u8 *value) { struct slot *slot = get_slot (hotplug_slot, __FUNCTION__); int retval; dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name); retval = slot->hpc_ops->get_power_status(slot, value); if (retval < 0) *value = hotplug_slot->info->power_status; return 0; } static int get_attention_status (struct hotplug_slot *hotplug_slot, u8 *value) { struct slot *slot = get_slot (hotplug_slot, __FUNCTION__); int retval; dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name); retval = slot->hpc_ops->get_attention_status(slot, value); if (retval < 0) *value = hotplug_slot->info->attention_status; return 0; } static int get_latch_status (struct hotplug_slot *hotplug_slot, u8 *value) { struct slot *slot = get_slot (hotplug_slot, __FUNCTION__); int retval; dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name); retval = slot->hpc_ops->get_latch_status(slot, value); if (retval < 0) *value = hotplug_slot->info->latch_status; return 0; } static int get_adapter_status (struct hotplug_slot *hotplug_slot, u8 *value) { struct slot *slot = get_slot (hotplug_slot, __FUNCTION__); int retval; dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name); retval = slot->hpc_ops->get_adapter_status(slot, value); if (retval < 0) *value = hotplug_slot->info->adapter_status; return 0; } static int get_max_bus_speed (struct hotplug_slot *hotplug_slot, enum pci_bus_speed *value) { struct slot *slot = get_slot (hotplug_slot, __FUNCTION__); int retval; dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name); retval = slot->hpc_ops->get_max_bus_speed(slot, value); if (retval < 0) *value = PCI_SPEED_UNKNOWN; return 0; } static int get_cur_bus_speed (struct hotplug_slot *hotplug_slot, enum pci_bus_speed *value) { struct slot *slot = get_slot (hotplug_slot, __FUNCTION__); int retval; dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name); retval = slot->hpc_ops->get_cur_bus_speed(slot, value); if (retval < 0) *value = PCI_SPEED_UNKNOWN; return 0; } static int is_shpc_capable(struct pci_dev *dev) { if ((dev->vendor == PCI_VENDOR_ID_AMD) || (dev->device == PCI_DEVICE_ID_AMD_GOLAM_7450)) return 1; if (pci_find_capability(dev, PCI_CAP_ID_SHPC)) return 1; return 0; } static int shpc_probe(struct pci_dev *pdev, const struct pci_device_id *ent) { int rc; struct controller *ctrl; struct slot *t_slot; int first_device_num; /* first PCI device number supported by this SHPC */ int num_ctlr_slots; /* number of slots supported by this SHPC */ if (!is_shpc_capable(pdev)) return -ENODEV; ctrl = (struct controller *) kmalloc(sizeof(struct controller), GFP_KERNEL); if (!ctrl) { err("%s : out of memory\n", __FUNCTION__); goto err_out_none; } memset(ctrl, 0, sizeof(struct controller)); dbg("DRV_thread pid = %d\n", current->pid); rc = shpc_init(ctrl, pdev, (php_intr_callback_t) shpchp_handle_attention_button, (php_intr_callback_t) shpchp_handle_switch_change, (php_intr_callback_t) shpchp_handle_presence_change, (php_intr_callback_t) shpchp_handle_power_fault); if (rc) { dbg("%s: controller initialization failed\n", SHPC_MODULE_NAME); goto err_out_free_ctrl; } dbg("%s: controller initialization success\n", __FUNCTION__); ctrl->pci_dev = pdev; /* pci_dev of the P2P bridge */ pci_set_drvdata(pdev, ctrl); ctrl->pci_bus = kmalloc (sizeof (*ctrl->pci_bus), GFP_KERNEL); if (!ctrl->pci_bus) { err("out of memory\n"); rc = -ENOMEM; goto err_out_unmap_mmio_region; } memcpy (ctrl->pci_bus, pdev->bus, sizeof (*ctrl->pci_bus)); ctrl->bus = pdev->bus->number; ctrl->slot_bus = pdev->subordinate->number; ctrl->device = PCI_SLOT(pdev->devfn); ctrl->function = PCI_FUNC(pdev->devfn); dbg("ctrl bus=0x%x, device=%x, function=%x, irq=%x\n", ctrl->bus, ctrl->device, ctrl->function, pdev->irq); /* * Save configuration headers for this and subordinate PCI buses */ rc = get_ctlr_slot_config(ctrl); if (rc) { err(msg_initialization_err, rc); goto err_out_free_ctrl_bus; } first_device_num = ctrl->slot_device_offset; num_ctlr_slots = ctrl->num_slots; ctrl->add_support = 1; /* Setup the slot information structures */ rc = init_slots(ctrl); if (rc) { err(msg_initialization_err, 6); goto err_out_free_ctrl_slot; } /* Now hpc_functions (slot->hpc_ops->functions) are ready */ t_slot = shpchp_find_slot(ctrl, first_device_num); /* Check for operation bus speed */ rc = t_slot->hpc_ops->get_cur_bus_speed(t_slot, &ctrl->speed); dbg("%s: t_slot->hp_slot %x\n", __FUNCTION__,t_slot->hp_slot); if (rc || ctrl->speed == PCI_SPEED_UNKNOWN) { err(SHPC_MODULE_NAME ": Can't get current bus speed. Set to 33MHz PCI.\n"); ctrl->speed = PCI_SPEED_33MHz; } /* Finish setting up the hot plug ctrl device */ ctrl->next_event = 0; if (!shpchp_ctrl_list) { shpchp_ctrl_list = ctrl; ctrl->next = NULL; } else { ctrl->next = shpchp_ctrl_list; shpchp_ctrl_list = ctrl; } shpchp_create_ctrl_files(ctrl); return 0; err_out_free_ctrl_slot: cleanup_slots(ctrl); err_out_free_ctrl_bus: kfree(ctrl->pci_bus); err_out_unmap_mmio_region: ctrl->hpc_ops->release_ctlr(ctrl); err_out_free_ctrl: kfree(ctrl); err_out_none: return -ENODEV; } static int shpc_start_thread(void) { int loop; int retval = 0; dbg("Initialize + Start the notification/polling mechanism \n"); retval = shpchp_event_start_thread(); if (retval) { dbg("shpchp_event_start_thread() failed\n"); return retval; } dbg("Initialize slot lists\n"); /* One slot list for each bus in the system */ for (loop = 0; loop < 256; loop++) { shpchp_slot_list[loop] = NULL; } return retval; } static void __exit unload_shpchpd(void) { struct pci_func *next; struct pci_func *TempSlot; int loop; struct controller *ctrl; struct controller *tctrl; ctrl = shpchp_ctrl_list; while (ctrl) { cleanup_slots(ctrl); kfree (ctrl->pci_bus); dbg("%s: calling release_ctlr\n", __FUNCTION__); ctrl->hpc_ops->release_ctlr(ctrl); tctrl = ctrl; ctrl = ctrl->next; kfree(tctrl); } for (loop = 0; loop < 256; loop++) { next = shpchp_slot_list[loop]; while (next != NULL) { TempSlot = next; next = next->next; kfree(TempSlot); } } /* Stop the notification mechanism */ shpchp_event_stop_thread(); } static struct pci_device_id shpcd_pci_tbl[] = { { .class = ((PCI_CLASS_BRIDGE_PCI << 8) | 0x00), .class_mask = ~0, .vendor = PCI_ANY_ID, .device = PCI_ANY_ID, .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID, }, { /* end: all zeroes */ } }; MODULE_DEVICE_TABLE(pci, shpcd_pci_tbl); static struct pci_driver shpc_driver = { .name = SHPC_MODULE_NAME, .id_table = shpcd_pci_tbl, .probe = shpc_probe, /* remove: shpc_remove_one, */ }; static int __init shpcd_init(void) { int retval = 0; #ifdef CONFIG_HOTPLUG_PCI_SHPC_POLL_EVENT_MODE shpchp_poll_mode = 1; #endif retval = shpc_start_thread(); if (retval) goto error_hpc_init; retval = pci_register_driver(&shpc_driver); dbg("%s: pci_register_driver = %d\n", __FUNCTION__, retval); info(DRIVER_DESC " version: " DRIVER_VERSION "\n"); error_hpc_init: if (retval) { shpchp_event_stop_thread(); } return retval; } static void __exit shpcd_cleanup(void) { dbg("unload_shpchpd()\n"); unload_shpchpd(); dbg("pci_unregister_driver\n"); pci_unregister_driver(&shpc_driver); info(DRIVER_DESC " version: " DRIVER_VERSION " unloaded\n"); } module_init(shpcd_init); module_exit(shpcd_cleanup);