From 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 Mon Sep 17 00:00:00 2001 From: Yunhong Jiang Date: Tue, 4 Aug 2015 12:17:53 -0700 Subject: Add the rt linux 4.1.3-rt3 as base Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang --- kernel/drivers/pci/hotplug/pcihp_skeleton.c | 365 ++++++++++++++++++++++++++++ 1 file changed, 365 insertions(+) create mode 100644 kernel/drivers/pci/hotplug/pcihp_skeleton.c (limited to 'kernel/drivers/pci/hotplug/pcihp_skeleton.c') diff --git a/kernel/drivers/pci/hotplug/pcihp_skeleton.c b/kernel/drivers/pci/hotplug/pcihp_skeleton.c new file mode 100644 index 000000000..d062c008f --- /dev/null +++ b/kernel/drivers/pci/hotplug/pcihp_skeleton.c @@ -0,0 +1,365 @@ +/* + * PCI Hot Plug Controller Skeleton Driver - 0.3 + * + * Copyright (C) 2001,2003 Greg Kroah-Hartman (greg@kroah.com) + * Copyright (C) 2001,2003 IBM Corp. + * + * 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. + * + * This driver is to be used as a skeleton driver to show how to interface + * with the pci hotplug core easily. + * + * Send feedback to + * + */ + +#include +#include +#include +#include +#include +#include +#include + +#define SLOT_NAME_SIZE 10 +struct slot { + u8 number; + struct hotplug_slot *hotplug_slot; + struct list_head slot_list; + char name[SLOT_NAME_SIZE]; +}; + +static LIST_HEAD(slot_list); + +#define MY_NAME "pcihp_skeleton" + +#define dbg(format, arg...) \ + do { \ + if (debug) \ + printk(KERN_DEBUG "%s: " format "\n", \ + MY_NAME , ## arg); \ + } while (0) +#define err(format, arg...) printk(KERN_ERR "%s: " format "\n", MY_NAME , ## arg) +#define info(format, arg...) printk(KERN_INFO "%s: " format "\n", MY_NAME , ## arg) +#define warn(format, arg...) printk(KERN_WARNING "%s: " format "\n", MY_NAME , ## arg) + +/* local variables */ +static bool debug; +static int num_slots; + +#define DRIVER_VERSION "0.3" +#define DRIVER_AUTHOR "Greg Kroah-Hartman " +#define DRIVER_DESC "Hot Plug PCI Controller Skeleton Driver" + +MODULE_AUTHOR(DRIVER_AUTHOR); +MODULE_DESCRIPTION(DRIVER_DESC); +MODULE_LICENSE("GPL"); +module_param(debug, bool, 0644); +MODULE_PARM_DESC(debug, "Debugging mode enabled or not"); + +static int enable_slot (struct hotplug_slot *slot); +static int disable_slot (struct hotplug_slot *slot); +static int set_attention_status (struct hotplug_slot *slot, u8 value); +static int hardware_test (struct hotplug_slot *slot, u32 value); +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 struct hotplug_slot_ops skel_hotplug_slot_ops = { + .enable_slot = enable_slot, + .disable_slot = disable_slot, + .set_attention_status = set_attention_status, + .hardware_test = hardware_test, + .get_power_status = get_power_status, + .get_attention_status = get_attention_status, + .get_latch_status = get_latch_status, + .get_adapter_status = get_adapter_status, +}; + +static int enable_slot(struct hotplug_slot *hotplug_slot) +{ + struct slot *slot = hotplug_slot->private; + int retval = 0; + + dbg("%s - physical_slot = %s\n", __func__, hotplug_slot->name); + + /* + * Fill in code here to enable the specified slot + */ + + return retval; +} + +static int disable_slot(struct hotplug_slot *hotplug_slot) +{ + struct slot *slot = hotplug_slot->private; + int retval = 0; + + dbg("%s - physical_slot = %s\n", __func__, hotplug_slot->name); + + /* + * Fill in code here to disable the specified slot + */ + + return retval; +} + +static int set_attention_status(struct hotplug_slot *hotplug_slot, u8 status) +{ + struct slot *slot = hotplug_slot->private; + int retval = 0; + + dbg("%s - physical_slot = %s\n", __func__, hotplug_slot->name); + + switch (status) { + case 0: + /* + * Fill in code here to turn light off + */ + break; + + case 1: + default: + /* + * Fill in code here to turn light on + */ + break; + } + + return retval; +} + +static int hardware_test(struct hotplug_slot *hotplug_slot, u32 value) +{ + struct slot *slot = hotplug_slot->private; + int retval = 0; + + dbg("%s - physical_slot = %s\n", __func__, hotplug_slot->name); + + switch (value) { + case 0: + /* Specify a test here */ + break; + case 1: + /* Specify another test here */ + break; + } + + return retval; +} + +static int get_power_status(struct hotplug_slot *hotplug_slot, u8 *value) +{ + struct slot *slot = hotplug_slot->private; + int retval = 0; + + dbg("%s - physical_slot = %s\n", __func__, hotplug_slot->name); + + /* + * Fill in logic to get the current power status of the specific + * slot and store it in the *value location. + */ + + return retval; +} + +static int get_attention_status(struct hotplug_slot *hotplug_slot, u8 *value) +{ + struct slot *slot = hotplug_slot->private; + int retval = 0; + + dbg("%s - physical_slot = %s\n", __func__, hotplug_slot->name); + + /* + * Fill in logic to get the current attention status of the specific + * slot and store it in the *value location. + */ + + return retval; +} + +static int get_latch_status(struct hotplug_slot *hotplug_slot, u8 *value) +{ + struct slot *slot = hotplug_slot->private; + int retval = 0; + + dbg("%s - physical_slot = %s\n", __func__, hotplug_slot->name); + + /* + * Fill in logic to get the current latch status of the specific + * slot and store it in the *value location. + */ + + return retval; +} + +static int get_adapter_status(struct hotplug_slot *hotplug_slot, u8 *value) +{ + struct slot *slot = hotplug_slot->private; + int retval = 0; + + dbg("%s - physical_slot = %s\n", __func__, hotplug_slot->name); + + /* + * Fill in logic to get the current adapter status of the specific + * slot and store it in the *value location. + */ + + return retval; +} + +static void release_slot(struct hotplug_slot *hotplug_slot) +{ + struct slot *slot = hotplug_slot->private; + + dbg("%s - physical_slot = %s\n", __func__, hotplug_slot->name); + kfree(slot->hotplug_slot->info); + kfree(slot->hotplug_slot); + kfree(slot); +} + +static void make_slot_name(struct slot *slot) +{ + /* + * Stupid way to make a filename out of the slot name. + * replace this if your hardware provides a better way to name slots. + */ + snprintf(slot->hotplug_slot->name, SLOT_NAME_SIZE, "%d", slot->number); +} + +/** + * init_slots - initialize 'struct slot' structures for each slot + * + */ +static int __init init_slots(void) +{ + struct slot *slot; + struct hotplug_slot *hotplug_slot; + struct hotplug_slot_info *info; + int retval; + int i; + + /* + * Create a structure for each slot, and register that slot + * with the pci_hotplug subsystem. + */ + for (i = 0; i < num_slots; ++i) { + slot = kzalloc(sizeof(*slot), GFP_KERNEL); + if (!slot) { + retval = -ENOMEM; + goto error; + } + + hotplug_slot = kzalloc(sizeof(*hotplug_slot), GFP_KERNEL); + if (!hotplug_slot) { + retval = -ENOMEM; + goto error_slot; + } + slot->hotplug_slot = hotplug_slot; + + info = kzalloc(sizeof(*info), GFP_KERNEL); + if (!info) { + retval = -ENOMEM; + goto error_hpslot; + } + hotplug_slot->info = info; + + slot->number = i; + + hotplug_slot->name = slot->name; + hotplug_slot->private = slot; + hotplug_slot->release = &release_slot; + make_slot_name(slot); + hotplug_slot->ops = &skel_hotplug_slot_ops; + + /* + * Initialize the slot info structure with some known + * good values. + */ + get_power_status(hotplug_slot, &info->power_status); + get_attention_status(hotplug_slot, &info->attention_status); + get_latch_status(hotplug_slot, &info->latch_status); + get_adapter_status(hotplug_slot, &info->adapter_status); + + dbg("registering slot %d\n", i); + retval = pci_hp_register(slot->hotplug_slot); + if (retval) { + err("pci_hp_register failed with error %d\n", retval); + goto error_info; + } + + /* add slot to our internal list */ + list_add(&slot->slot_list, &slot_list); + } + + return 0; +error_info: + kfree(info); +error_hpslot: + kfree(hotplug_slot); +error_slot: + kfree(slot); +error: + return retval; +} + +static void __exit cleanup_slots(void) +{ + struct list_head *tmp; + struct list_head *next; + struct slot *slot; + + /* + * Unregister all of our slots with the pci_hotplug subsystem. + * Memory will be freed in release_slot() callback after slot's + * lifespan is finished. + */ + list_for_each_safe(tmp, next, &slot_list) { + slot = list_entry(tmp, struct slot, slot_list); + list_del(&slot->slot_list); + pci_hp_deregister(slot->hotplug_slot); + } +} + +static int __init pcihp_skel_init(void) +{ + int retval; + + info(DRIVER_DESC " version: " DRIVER_VERSION "\n"); + /* + * Do specific initialization stuff for your driver here + * like initializing your controller hardware (if any) and + * determining the number of slots you have in the system + * right now. + */ + num_slots = 5; + + return init_slots(); +} + +static void __exit pcihp_skel_exit(void) +{ + /* + * Clean everything up. + */ + cleanup_slots(); +} + +module_init(pcihp_skel_init); +module_exit(pcihp_skel_exit); -- cgit 1.2.3-korg