forked from Minki/linux
dbd7a78818
This patch converts the standard hotplug controller driver to use the PCI core for resource management. This eliminates a whole lot of duplicated code, and integrates shpchp in the system's normal PCI handling code. Signed-off-by: Rajesh Shah <rajesh.shah@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
1308 lines
34 KiB
C
1308 lines
34 KiB
C
/*
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* Standard Hot Plug Controller Driver
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*
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* Copyright (C) 1995,2001 Compaq Computer Corporation
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* Copyright (C) 2001 Greg Kroah-Hartman (greg@kroah.com)
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* Copyright (C) 2001 IBM Corp.
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* Copyright (C) 2003-2004 Intel Corporation
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*
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* All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or (at
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* your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
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* NON INFRINGEMENT. See the GNU General Public License for more
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* details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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* Send feedback to <greg@kroah.com>, <kristen.c.accardi@intel.com>
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*
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*/
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#include <linux/config.h>
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <linux/slab.h>
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#include <linux/workqueue.h>
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#include <linux/interrupt.h>
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#include <linux/delay.h>
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#include <linux/wait.h>
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#include <linux/smp_lock.h>
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#include <linux/pci.h>
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#include "../pci.h"
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#include "shpchp.h"
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#include "shpchprm.h"
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static void interrupt_event_handler(struct controller *ctrl);
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static struct semaphore event_semaphore; /* mutex for process loop (up if something to process) */
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static struct semaphore event_exit; /* guard ensure thread has exited before calling it quits */
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static int event_finished;
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static unsigned long pushbutton_pending; /* = 0 */
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u8 shpchp_handle_attention_button(u8 hp_slot, void *inst_id)
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{
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struct controller *ctrl = (struct controller *) inst_id;
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struct slot *p_slot;
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u8 rc = 0;
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u8 getstatus;
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struct pci_func *func;
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struct event_info *taskInfo;
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/* Attention Button Change */
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dbg("shpchp: Attention button interrupt received.\n");
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func = shpchp_slot_find(ctrl->slot_bus, (hp_slot + ctrl->slot_device_offset), 0);
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/* This is the structure that tells the worker thread what to do */
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taskInfo = &(ctrl->event_queue[ctrl->next_event]);
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p_slot = shpchp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset);
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p_slot->hpc_ops->get_adapter_status(p_slot, &(func->presence_save));
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p_slot->hpc_ops->get_latch_status(p_slot, &getstatus);
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ctrl->next_event = (ctrl->next_event + 1) % 10;
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taskInfo->hp_slot = hp_slot;
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rc++;
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/*
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* Button pressed - See if need to TAKE ACTION!!!
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*/
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info("Button pressed on Slot(%d)\n", ctrl->first_slot + hp_slot);
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taskInfo->event_type = INT_BUTTON_PRESS;
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if ((p_slot->state == BLINKINGON_STATE)
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|| (p_slot->state == BLINKINGOFF_STATE)) {
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/* Cancel if we are still blinking; this means that we press the
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* attention again before the 5 sec. limit expires to cancel hot-add
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* or hot-remove
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*/
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taskInfo->event_type = INT_BUTTON_CANCEL;
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info("Button cancel on Slot(%d)\n", ctrl->first_slot + hp_slot);
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} else if ((p_slot->state == POWERON_STATE)
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|| (p_slot->state == POWEROFF_STATE)) {
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/* Ignore if the slot is on power-on or power-off state; this
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* means that the previous attention button action to hot-add or
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* hot-remove is undergoing
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*/
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taskInfo->event_type = INT_BUTTON_IGNORE;
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info("Button ignore on Slot(%d)\n", ctrl->first_slot + hp_slot);
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}
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if (rc)
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up(&event_semaphore); /* signal event thread that new event is posted */
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return 0;
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}
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u8 shpchp_handle_switch_change(u8 hp_slot, void *inst_id)
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{
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struct controller *ctrl = (struct controller *) inst_id;
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struct slot *p_slot;
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u8 rc = 0;
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u8 getstatus;
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struct pci_func *func;
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struct event_info *taskInfo;
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/* Switch Change */
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dbg("shpchp: Switch interrupt received.\n");
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func = shpchp_slot_find(ctrl->slot_bus, (hp_slot + ctrl->slot_device_offset), 0);
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/* This is the structure that tells the worker thread
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* what to do
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*/
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taskInfo = &(ctrl->event_queue[ctrl->next_event]);
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ctrl->next_event = (ctrl->next_event + 1) % 10;
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taskInfo->hp_slot = hp_slot;
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rc++;
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p_slot = shpchp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset);
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p_slot->hpc_ops->get_adapter_status(p_slot, &(func->presence_save));
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p_slot->hpc_ops->get_latch_status(p_slot, &getstatus);
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dbg("%s: Card present %x Power status %x\n", __FUNCTION__,
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func->presence_save, func->pwr_save);
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if (getstatus) {
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/*
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* Switch opened
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*/
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info("Latch open on Slot(%d)\n", ctrl->first_slot + hp_slot);
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func->switch_save = 0;
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taskInfo->event_type = INT_SWITCH_OPEN;
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if (func->pwr_save && func->presence_save) {
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taskInfo->event_type = INT_POWER_FAULT;
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err("Surprise Removal of card\n");
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}
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} else {
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/*
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* Switch closed
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*/
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info("Latch close on Slot(%d)\n", ctrl->first_slot + hp_slot);
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func->switch_save = 0x10;
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taskInfo->event_type = INT_SWITCH_CLOSE;
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}
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if (rc)
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up(&event_semaphore); /* signal event thread that new event is posted */
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return rc;
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}
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u8 shpchp_handle_presence_change(u8 hp_slot, void *inst_id)
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{
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struct controller *ctrl = (struct controller *) inst_id;
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struct slot *p_slot;
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u8 rc = 0;
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/*u8 temp_byte;*/
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struct pci_func *func;
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struct event_info *taskInfo;
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/* Presence Change */
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dbg("shpchp: Presence/Notify input change.\n");
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func = shpchp_slot_find(ctrl->slot_bus, (hp_slot + ctrl->slot_device_offset), 0);
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/* This is the structure that tells the worker thread
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* what to do
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*/
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taskInfo = &(ctrl->event_queue[ctrl->next_event]);
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ctrl->next_event = (ctrl->next_event + 1) % 10;
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taskInfo->hp_slot = hp_slot;
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rc++;
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p_slot = shpchp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset);
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/*
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* Save the presence state
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*/
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p_slot->hpc_ops->get_adapter_status(p_slot, &(func->presence_save));
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if (func->presence_save) {
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/*
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* Card Present
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*/
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info("Card present on Slot(%d)\n", ctrl->first_slot + hp_slot);
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taskInfo->event_type = INT_PRESENCE_ON;
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} else {
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/*
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* Not Present
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*/
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info("Card not present on Slot(%d)\n", ctrl->first_slot + hp_slot);
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taskInfo->event_type = INT_PRESENCE_OFF;
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}
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if (rc)
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up(&event_semaphore); /* signal event thread that new event is posted */
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return rc;
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}
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u8 shpchp_handle_power_fault(u8 hp_slot, void *inst_id)
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{
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struct controller *ctrl = (struct controller *) inst_id;
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struct slot *p_slot;
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u8 rc = 0;
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struct pci_func *func;
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struct event_info *taskInfo;
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/* Power fault */
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dbg("shpchp: Power fault interrupt received.\n");
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func = shpchp_slot_find(ctrl->slot_bus, (hp_slot + ctrl->slot_device_offset), 0);
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/* This is the structure that tells the worker thread
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* what to do
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*/
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taskInfo = &(ctrl->event_queue[ctrl->next_event]);
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ctrl->next_event = (ctrl->next_event + 1) % 10;
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taskInfo->hp_slot = hp_slot;
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rc++;
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p_slot = shpchp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset);
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if ( !(p_slot->hpc_ops->query_power_fault(p_slot))) {
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/*
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* Power fault Cleared
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*/
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info("Power fault cleared on Slot(%d)\n", ctrl->first_slot + hp_slot);
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func->status = 0x00;
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taskInfo->event_type = INT_POWER_FAULT_CLEAR;
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} else {
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/*
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* Power fault
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*/
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info("Power fault on Slot(%d)\n", ctrl->first_slot + hp_slot);
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taskInfo->event_type = INT_POWER_FAULT;
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/* set power fault status for this board */
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func->status = 0xFF;
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info("power fault bit %x set\n", hp_slot);
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}
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if (rc)
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up(&event_semaphore); /* signal event thread that new event is posted */
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return rc;
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}
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/**
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* shpchp_slot_create - Creates a node and adds it to the proper bus.
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* @busnumber - bus where new node is to be located
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*
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* Returns pointer to the new node or NULL if unsuccessful
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*/
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struct pci_func *shpchp_slot_create(u8 busnumber)
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{
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struct pci_func *new_slot;
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struct pci_func *next;
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new_slot = kmalloc(sizeof(*new_slot), GFP_KERNEL);
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if (new_slot == NULL) {
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return(new_slot);
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}
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memset(new_slot, 0, sizeof(struct pci_func));
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new_slot->next = NULL;
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new_slot->configured = 1;
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if (shpchp_slot_list[busnumber] == NULL) {
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shpchp_slot_list[busnumber] = new_slot;
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} else {
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next = shpchp_slot_list[busnumber];
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while (next->next != NULL)
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next = next->next;
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next->next = new_slot;
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}
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return(new_slot);
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}
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/*
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* slot_remove - Removes a node from the linked list of slots.
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* @old_slot: slot to remove
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*
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* Returns 0 if successful, !0 otherwise.
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*/
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static int slot_remove(struct pci_func * old_slot)
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{
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struct pci_func *next;
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if (old_slot == NULL)
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return(1);
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next = shpchp_slot_list[old_slot->bus];
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if (next == NULL) {
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return(1);
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}
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if (next == old_slot) {
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shpchp_slot_list[old_slot->bus] = old_slot->next;
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kfree(old_slot);
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return(0);
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}
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while ((next->next != old_slot) && (next->next != NULL)) {
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next = next->next;
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}
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if (next->next == old_slot) {
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next->next = old_slot->next;
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kfree(old_slot);
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return(0);
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} else
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return(2);
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}
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/**
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* bridge_slot_remove - Removes a node from the linked list of slots.
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* @bridge: bridge to remove
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*
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* Returns 0 if successful, !0 otherwise.
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*/
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static int bridge_slot_remove(struct pci_func *bridge)
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{
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u8 subordinateBus, secondaryBus;
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u8 tempBus;
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struct pci_func *next;
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if (bridge == NULL)
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return(1);
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secondaryBus = (bridge->config_space[0x06] >> 8) & 0xFF;
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subordinateBus = (bridge->config_space[0x06] >> 16) & 0xFF;
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for (tempBus = secondaryBus; tempBus <= subordinateBus; tempBus++) {
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next = shpchp_slot_list[tempBus];
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while (!slot_remove(next)) {
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next = shpchp_slot_list[tempBus];
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}
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}
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next = shpchp_slot_list[bridge->bus];
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if (next == NULL) {
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return(1);
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}
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if (next == bridge) {
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shpchp_slot_list[bridge->bus] = bridge->next;
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kfree(bridge);
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return(0);
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}
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while ((next->next != bridge) && (next->next != NULL)) {
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next = next->next;
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}
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if (next->next == bridge) {
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next->next = bridge->next;
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kfree(bridge);
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return(0);
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} else
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return(2);
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}
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/**
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* shpchp_slot_find - Looks for a node by bus, and device, multiple functions accessed
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* @bus: bus to find
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* @device: device to find
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* @index: is 0 for first function found, 1 for the second...
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*
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* Returns pointer to the node if successful, %NULL otherwise.
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*/
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struct pci_func *shpchp_slot_find(u8 bus, u8 device, u8 index)
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{
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int found = -1;
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struct pci_func *func;
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func = shpchp_slot_list[bus];
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if ((func == NULL) || ((func->device == device) && (index == 0)))
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return(func);
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if (func->device == device)
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found++;
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while (func->next != NULL) {
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func = func->next;
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if (func->device == device)
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found++;
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if (found == index)
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return(func);
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}
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return(NULL);
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}
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static int is_bridge(struct pci_func * func)
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{
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/* Check the header type */
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if (((func->config_space[0x03] >> 16) & 0xFF) == 0x01)
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return 1;
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else
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return 0;
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}
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/* The following routines constitute the bulk of the
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hotplug controller logic
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*/
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static u32 change_bus_speed(struct controller *ctrl, struct slot *p_slot, enum pci_bus_speed speed)
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{
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u32 rc = 0;
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dbg("%s: change to speed %d\n", __FUNCTION__, speed);
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down(&ctrl->crit_sect);
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if ((rc = p_slot->hpc_ops->set_bus_speed_mode(p_slot, speed))) {
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err("%s: Issue of set bus speed mode command failed\n", __FUNCTION__);
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up(&ctrl->crit_sect);
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return WRONG_BUS_FREQUENCY;
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}
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wait_for_ctrl_irq (ctrl);
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if ((rc = p_slot->hpc_ops->check_cmd_status(ctrl))) {
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err("%s: Can't set bus speed/mode in the case of adapter & bus mismatch\n",
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__FUNCTION__);
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err("%s: Error code (%d)\n", __FUNCTION__, rc);
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up(&ctrl->crit_sect);
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return WRONG_BUS_FREQUENCY;
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}
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up(&ctrl->crit_sect);
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return rc;
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}
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static u32 fix_bus_speed(struct controller *ctrl, struct slot *pslot, u8 flag,
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enum pci_bus_speed asp, enum pci_bus_speed bsp, enum pci_bus_speed msp)
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{
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u32 rc = 0;
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if (flag != 0) { /* Other slots on the same bus are occupied */
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if ( asp < bsp ) {
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err("%s: speed of bus %x and adapter %x mismatch\n", __FUNCTION__, bsp, asp);
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return WRONG_BUS_FREQUENCY;
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}
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} else {
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/* Other slots on the same bus are empty */
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if (msp == bsp) {
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/* if adapter_speed >= bus_speed, do nothing */
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if (asp < bsp) {
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/*
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* Try to lower bus speed to accommodate the adapter if other slots
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* on the same controller are empty
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*/
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if ((rc = change_bus_speed(ctrl, pslot, asp)))
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return rc;
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}
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} else {
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if (asp < msp) {
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if ((rc = change_bus_speed(ctrl, pslot, asp)))
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return rc;
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} else {
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if ((rc = change_bus_speed(ctrl, pslot, msp)))
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return rc;
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}
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}
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}
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return rc;
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}
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/**
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* board_added - Called after a board has been added to the system.
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*
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* Turns power on for the board
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* Configures board
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*
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*/
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static u32 board_added(struct pci_func * func, struct controller * ctrl)
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{
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u8 hp_slot;
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u8 slots_not_empty = 0;
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u32 rc = 0;
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struct slot *p_slot;
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enum pci_bus_speed adapter_speed, bus_speed, max_bus_speed;
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u8 pi, mode;
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p_slot = shpchp_find_slot(ctrl, func->device);
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hp_slot = func->device - ctrl->slot_device_offset;
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dbg("%s: func->device, slot_offset, hp_slot = %d, %d ,%d\n", __FUNCTION__, func->device, ctrl->slot_device_offset, hp_slot);
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/* Wait for exclusive access to hardware */
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down(&ctrl->crit_sect);
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/* Power on slot without connecting to bus */
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rc = p_slot->hpc_ops->power_on_slot(p_slot);
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if (rc) {
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err("%s: Failed to power on slot\n", __FUNCTION__);
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/* Done with exclusive hardware access */
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up(&ctrl->crit_sect);
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return -1;
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|
}
|
|
|
|
/* Wait for the command to complete */
|
|
wait_for_ctrl_irq (ctrl);
|
|
|
|
rc = p_slot->hpc_ops->check_cmd_status(ctrl);
|
|
if (rc) {
|
|
err("%s: Failed to power on slot, error code(%d)\n", __FUNCTION__, rc);
|
|
/* Done with exclusive hardware access */
|
|
up(&ctrl->crit_sect);
|
|
return -1;
|
|
}
|
|
|
|
|
|
if ((ctrl->pci_dev->vendor == 0x8086) && (ctrl->pci_dev->device == 0x0332)) {
|
|
if (slots_not_empty)
|
|
return WRONG_BUS_FREQUENCY;
|
|
|
|
if ((rc = p_slot->hpc_ops->set_bus_speed_mode(p_slot, PCI_SPEED_33MHz))) {
|
|
err("%s: Issue of set bus speed mode command failed\n", __FUNCTION__);
|
|
up(&ctrl->crit_sect);
|
|
return WRONG_BUS_FREQUENCY;
|
|
}
|
|
wait_for_ctrl_irq (ctrl);
|
|
|
|
if ((rc = p_slot->hpc_ops->check_cmd_status(ctrl))) {
|
|
err("%s: Can't set bus speed/mode in the case of adapter & bus mismatch\n",
|
|
__FUNCTION__);
|
|
err("%s: Error code (%d)\n", __FUNCTION__, rc);
|
|
up(&ctrl->crit_sect);
|
|
return WRONG_BUS_FREQUENCY;
|
|
}
|
|
/* turn on board, blink green LED, turn off Amber LED */
|
|
if ((rc = p_slot->hpc_ops->slot_enable(p_slot))) {
|
|
err("%s: Issue of Slot Enable command failed\n", __FUNCTION__);
|
|
up(&ctrl->crit_sect);
|
|
return rc;
|
|
}
|
|
wait_for_ctrl_irq (ctrl);
|
|
|
|
if ((rc = p_slot->hpc_ops->check_cmd_status(ctrl))) {
|
|
err("%s: Failed to enable slot, error code(%d)\n", __FUNCTION__, rc);
|
|
up(&ctrl->crit_sect);
|
|
return rc;
|
|
}
|
|
}
|
|
|
|
rc = p_slot->hpc_ops->get_adapter_speed(p_slot, &adapter_speed);
|
|
/* 0 = PCI 33Mhz, 1 = PCI 66 Mhz, 2 = PCI-X 66 PA, 4 = PCI-X 66 ECC, */
|
|
/* 5 = PCI-X 133 PA, 7 = PCI-X 133 ECC, 0xa = PCI-X 133 Mhz 266, */
|
|
/* 0xd = PCI-X 133 Mhz 533 */
|
|
/* This encoding is different from the one used in cur_bus_speed & */
|
|
/* max_bus_speed */
|
|
|
|
if (rc || adapter_speed == PCI_SPEED_UNKNOWN) {
|
|
err("%s: Can't get adapter speed or bus mode mismatch\n", __FUNCTION__);
|
|
/* Done with exclusive hardware access */
|
|
up(&ctrl->crit_sect);
|
|
return WRONG_BUS_FREQUENCY;
|
|
}
|
|
|
|
rc = p_slot->hpc_ops->get_cur_bus_speed(p_slot, &bus_speed);
|
|
if (rc || bus_speed == PCI_SPEED_UNKNOWN) {
|
|
err("%s: Can't get bus operation speed\n", __FUNCTION__);
|
|
/* Done with exclusive hardware access */
|
|
up(&ctrl->crit_sect);
|
|
return WRONG_BUS_FREQUENCY;
|
|
}
|
|
|
|
rc = p_slot->hpc_ops->get_max_bus_speed(p_slot, &max_bus_speed);
|
|
if (rc || max_bus_speed == PCI_SPEED_UNKNOWN) {
|
|
err("%s: Can't get max bus operation speed\n", __FUNCTION__);
|
|
max_bus_speed = bus_speed;
|
|
}
|
|
|
|
/* Done with exclusive hardware access */
|
|
up(&ctrl->crit_sect);
|
|
|
|
if ((rc = p_slot->hpc_ops->get_prog_int(p_slot, &pi))) {
|
|
err("%s: Can't get controller programming interface, set it to 1\n", __FUNCTION__);
|
|
pi = 1;
|
|
}
|
|
|
|
/* Check if there are other slots or devices on the same bus */
|
|
if (!list_empty(&ctrl->pci_dev->subordinate->devices))
|
|
slots_not_empty = 1;
|
|
|
|
dbg("%s: slots_not_empty %d, pi %d\n", __FUNCTION__,
|
|
slots_not_empty, pi);
|
|
dbg("adapter_speed %d, bus_speed %d, max_bus_speed %d\n",
|
|
adapter_speed, bus_speed, max_bus_speed);
|
|
|
|
if (pi == 2) {
|
|
dbg("%s: In PI = %d\n", __FUNCTION__, pi);
|
|
if ((rc = p_slot->hpc_ops->get_mode1_ECC_cap(p_slot, &mode))) {
|
|
err("%s: Can't get Mode1_ECC, set mode to 0\n", __FUNCTION__);
|
|
mode = 0;
|
|
}
|
|
|
|
switch (adapter_speed) {
|
|
case PCI_SPEED_133MHz_PCIX_533:
|
|
case PCI_SPEED_133MHz_PCIX_266:
|
|
if ((bus_speed != adapter_speed) &&
|
|
((rc = fix_bus_speed(ctrl, p_slot, slots_not_empty, adapter_speed, bus_speed, max_bus_speed))))
|
|
return rc;
|
|
break;
|
|
case PCI_SPEED_133MHz_PCIX_ECC:
|
|
case PCI_SPEED_133MHz_PCIX:
|
|
if (mode) { /* Bus - Mode 1 ECC */
|
|
if ((bus_speed != 0x7) &&
|
|
((rc = fix_bus_speed(ctrl, p_slot, slots_not_empty, adapter_speed, bus_speed, max_bus_speed))))
|
|
return rc;
|
|
} else {
|
|
if ((bus_speed != 0x4) &&
|
|
((rc = fix_bus_speed(ctrl, p_slot, slots_not_empty, adapter_speed, bus_speed, max_bus_speed))))
|
|
return rc;
|
|
}
|
|
break;
|
|
case PCI_SPEED_66MHz_PCIX_ECC:
|
|
case PCI_SPEED_66MHz_PCIX:
|
|
if (mode) { /* Bus - Mode 1 ECC */
|
|
if ((bus_speed != 0x5) &&
|
|
((rc = fix_bus_speed(ctrl, p_slot, slots_not_empty, adapter_speed, bus_speed, max_bus_speed))))
|
|
return rc;
|
|
} else {
|
|
if ((bus_speed != 0x2) &&
|
|
((rc = fix_bus_speed(ctrl, p_slot, slots_not_empty, adapter_speed, bus_speed, max_bus_speed))))
|
|
return rc;
|
|
}
|
|
break;
|
|
case PCI_SPEED_66MHz:
|
|
if ((bus_speed != 0x1) &&
|
|
((rc = fix_bus_speed(ctrl, p_slot, slots_not_empty, adapter_speed, bus_speed, max_bus_speed))))
|
|
return rc;
|
|
break;
|
|
case PCI_SPEED_33MHz:
|
|
if (bus_speed > 0x0) {
|
|
if (slots_not_empty == 0) {
|
|
if ((rc = change_bus_speed(ctrl, p_slot, adapter_speed)))
|
|
return rc;
|
|
} else {
|
|
err("%s: speed of bus %x and adapter %x mismatch\n", __FUNCTION__, bus_speed, adapter_speed);
|
|
return WRONG_BUS_FREQUENCY;
|
|
}
|
|
}
|
|
break;
|
|
default:
|
|
err("%s: speed of bus %x and adapter %x mismatch\n", __FUNCTION__, bus_speed, adapter_speed);
|
|
return WRONG_BUS_FREQUENCY;
|
|
}
|
|
} else {
|
|
/* If adpater_speed == bus_speed, nothing to do here */
|
|
dbg("%s: In PI = %d\n", __FUNCTION__, pi);
|
|
if ((adapter_speed != bus_speed) &&
|
|
((rc = fix_bus_speed(ctrl, p_slot, slots_not_empty, adapter_speed, bus_speed, max_bus_speed))))
|
|
return rc;
|
|
}
|
|
|
|
down(&ctrl->crit_sect);
|
|
/* turn on board, blink green LED, turn off Amber LED */
|
|
if ((rc = p_slot->hpc_ops->slot_enable(p_slot))) {
|
|
err("%s: Issue of Slot Enable command failed\n", __FUNCTION__);
|
|
up(&ctrl->crit_sect);
|
|
return rc;
|
|
}
|
|
wait_for_ctrl_irq (ctrl);
|
|
|
|
if ((rc = p_slot->hpc_ops->check_cmd_status(ctrl))) {
|
|
err("%s: Failed to enable slot, error code(%d)\n", __FUNCTION__, rc);
|
|
up(&ctrl->crit_sect);
|
|
return rc;
|
|
}
|
|
|
|
up(&ctrl->crit_sect);
|
|
|
|
/* Wait for ~1 second */
|
|
dbg("%s: before long_delay\n", __FUNCTION__);
|
|
wait_for_ctrl_irq (ctrl);
|
|
dbg("%s: after long_delay\n", __FUNCTION__);
|
|
|
|
dbg("%s: func status = %x\n", __FUNCTION__, func->status);
|
|
/* Check for a power fault */
|
|
if (func->status == 0xFF) {
|
|
/* power fault occurred, but it was benign */
|
|
dbg("%s: power fault\n", __FUNCTION__);
|
|
rc = POWER_FAILURE;
|
|
func->status = 0;
|
|
goto err_exit;
|
|
}
|
|
|
|
if (shpchp_configure_device(p_slot)) {
|
|
err("Cannot add device at 0x%x:0x%x\n", p_slot->bus,
|
|
p_slot->device);
|
|
goto err_exit;
|
|
}
|
|
|
|
shpchp_save_slot_config(ctrl, func);
|
|
|
|
func->status = 0;
|
|
func->switch_save = 0x10;
|
|
func->is_a_board = 0x01;
|
|
func->pwr_save = 1;
|
|
|
|
/* Wait for exclusive access to hardware */
|
|
down(&ctrl->crit_sect);
|
|
|
|
p_slot->hpc_ops->green_led_on(p_slot);
|
|
|
|
/* Wait for the command to complete */
|
|
wait_for_ctrl_irq (ctrl);
|
|
|
|
/* Done with exclusive hardware access */
|
|
up(&ctrl->crit_sect);
|
|
|
|
return 0;
|
|
|
|
err_exit:
|
|
/* Wait for exclusive access to hardware */
|
|
down(&ctrl->crit_sect);
|
|
|
|
/* turn off slot, turn on Amber LED, turn off Green LED */
|
|
rc = p_slot->hpc_ops->slot_disable(p_slot);
|
|
if (rc) {
|
|
err("%s: Issue of Slot Disable command failed\n", __FUNCTION__);
|
|
/* Done with exclusive hardware access */
|
|
up(&ctrl->crit_sect);
|
|
return rc;
|
|
}
|
|
/* Wait for the command to complete */
|
|
wait_for_ctrl_irq (ctrl);
|
|
|
|
rc = p_slot->hpc_ops->check_cmd_status(ctrl);
|
|
if (rc) {
|
|
err("%s: Failed to disable slot, error code(%d)\n", __FUNCTION__, rc);
|
|
/* Done with exclusive hardware access */
|
|
up(&ctrl->crit_sect);
|
|
return rc;
|
|
}
|
|
|
|
/* Done with exclusive hardware access */
|
|
up(&ctrl->crit_sect);
|
|
|
|
return(rc);
|
|
}
|
|
|
|
|
|
/**
|
|
* remove_board - Turns off slot and LED's
|
|
*
|
|
*/
|
|
static u32 remove_board(struct pci_func *func, struct controller *ctrl)
|
|
{
|
|
u8 device;
|
|
u8 hp_slot;
|
|
u32 rc;
|
|
struct slot *p_slot;
|
|
|
|
if (func == NULL)
|
|
return(1);
|
|
|
|
if (shpchp_unconfigure_device(func))
|
|
return(1);
|
|
|
|
device = func->device;
|
|
|
|
hp_slot = func->device - ctrl->slot_device_offset;
|
|
p_slot = shpchp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset);
|
|
|
|
dbg("In %s, hp_slot = %d\n", __FUNCTION__, hp_slot);
|
|
|
|
/* Change status to shutdown */
|
|
if (func->is_a_board)
|
|
func->status = 0x01;
|
|
func->configured = 0;
|
|
|
|
/* Wait for exclusive access to hardware */
|
|
down(&ctrl->crit_sect);
|
|
|
|
/* turn off slot, turn on Amber LED, turn off Green LED */
|
|
rc = p_slot->hpc_ops->slot_disable(p_slot);
|
|
if (rc) {
|
|
err("%s: Issue of Slot Disable command failed\n", __FUNCTION__);
|
|
/* Done with exclusive hardware access */
|
|
up(&ctrl->crit_sect);
|
|
return rc;
|
|
}
|
|
/* Wait for the command to complete */
|
|
wait_for_ctrl_irq (ctrl);
|
|
|
|
rc = p_slot->hpc_ops->check_cmd_status(ctrl);
|
|
if (rc) {
|
|
err("%s: Failed to disable slot, error code(%d)\n", __FUNCTION__, rc);
|
|
/* Done with exclusive hardware access */
|
|
up(&ctrl->crit_sect);
|
|
return rc;
|
|
}
|
|
|
|
rc = p_slot->hpc_ops->set_attention_status(p_slot, 0);
|
|
if (rc) {
|
|
err("%s: Issue of Set Attention command failed\n", __FUNCTION__);
|
|
/* Done with exclusive hardware access */
|
|
up(&ctrl->crit_sect);
|
|
return rc;
|
|
}
|
|
/* Wait for the command to complete */
|
|
wait_for_ctrl_irq (ctrl);
|
|
|
|
/* Done with exclusive hardware access */
|
|
up(&ctrl->crit_sect);
|
|
|
|
if (ctrl->add_support) {
|
|
while (func) {
|
|
if (is_bridge(func)) {
|
|
dbg("PCI Bridge Hot-Remove s:b:d:f(%02x:%02x:%02x:%02x)\n", ctrl->seg, func->bus,
|
|
func->device, func->function);
|
|
bridge_slot_remove(func);
|
|
} else
|
|
dbg("PCI Function Hot-Remove s:b:d:f(%02x:%02x:%02x:%02x)\n", ctrl->seg, func->bus,
|
|
func->device, func->function);
|
|
slot_remove(func);
|
|
|
|
func = shpchp_slot_find(ctrl->slot_bus, device, 0);
|
|
}
|
|
|
|
/* Setup slot structure with entry for empty slot */
|
|
func = shpchp_slot_create(ctrl->slot_bus);
|
|
|
|
if (func == NULL) {
|
|
return(1);
|
|
}
|
|
|
|
func->bus = ctrl->slot_bus;
|
|
func->device = device;
|
|
func->function = 0;
|
|
func->configured = 0;
|
|
func->switch_save = 0x10;
|
|
func->pwr_save = 0;
|
|
func->is_a_board = 0;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static void pushbutton_helper_thread (unsigned long data)
|
|
{
|
|
pushbutton_pending = data;
|
|
|
|
up(&event_semaphore);
|
|
}
|
|
|
|
|
|
/**
|
|
* shpchp_pushbutton_thread
|
|
*
|
|
* Scheduled procedure to handle blocking stuff for the pushbuttons
|
|
* Handles all pending events and exits.
|
|
*
|
|
*/
|
|
static void shpchp_pushbutton_thread (unsigned long slot)
|
|
{
|
|
struct slot *p_slot = (struct slot *) slot;
|
|
u8 getstatus;
|
|
|
|
pushbutton_pending = 0;
|
|
|
|
if (!p_slot) {
|
|
dbg("%s: Error! slot NULL\n", __FUNCTION__);
|
|
return;
|
|
}
|
|
|
|
p_slot->hpc_ops->get_power_status(p_slot, &getstatus);
|
|
if (getstatus) {
|
|
p_slot->state = POWEROFF_STATE;
|
|
dbg("In power_down_board, b:d(%x:%x)\n", p_slot->bus, p_slot->device);
|
|
|
|
shpchp_disable_slot(p_slot);
|
|
p_slot->state = STATIC_STATE;
|
|
} else {
|
|
p_slot->state = POWERON_STATE;
|
|
dbg("In add_board, b:d(%x:%x)\n", p_slot->bus, p_slot->device);
|
|
|
|
if (shpchp_enable_slot(p_slot)) {
|
|
/* Wait for exclusive access to hardware */
|
|
down(&p_slot->ctrl->crit_sect);
|
|
|
|
p_slot->hpc_ops->green_led_off(p_slot);
|
|
|
|
/* Wait for the command to complete */
|
|
wait_for_ctrl_irq (p_slot->ctrl);
|
|
|
|
/* Done with exclusive hardware access */
|
|
up(&p_slot->ctrl->crit_sect);
|
|
}
|
|
p_slot->state = STATIC_STATE;
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
|
|
/* this is the main worker thread */
|
|
static int event_thread(void* data)
|
|
{
|
|
struct controller *ctrl;
|
|
lock_kernel();
|
|
daemonize("shpchpd_event");
|
|
unlock_kernel();
|
|
|
|
while (1) {
|
|
dbg("!!!!event_thread sleeping\n");
|
|
down_interruptible (&event_semaphore);
|
|
dbg("event_thread woken finished = %d\n", event_finished);
|
|
if (event_finished || signal_pending(current))
|
|
break;
|
|
/* Do stuff here */
|
|
if (pushbutton_pending)
|
|
shpchp_pushbutton_thread(pushbutton_pending);
|
|
else
|
|
for (ctrl = shpchp_ctrl_list; ctrl; ctrl=ctrl->next)
|
|
interrupt_event_handler(ctrl);
|
|
}
|
|
dbg("event_thread signals exit\n");
|
|
up(&event_exit);
|
|
return 0;
|
|
}
|
|
|
|
int shpchp_event_start_thread (void)
|
|
{
|
|
int pid;
|
|
|
|
/* initialize our semaphores */
|
|
init_MUTEX_LOCKED(&event_exit);
|
|
event_finished=0;
|
|
|
|
init_MUTEX_LOCKED(&event_semaphore);
|
|
pid = kernel_thread(event_thread, NULL, 0);
|
|
|
|
if (pid < 0) {
|
|
err ("Can't start up our event thread\n");
|
|
return -1;
|
|
}
|
|
dbg("Our event thread pid = %d\n", pid);
|
|
return 0;
|
|
}
|
|
|
|
|
|
void shpchp_event_stop_thread (void)
|
|
{
|
|
event_finished = 1;
|
|
dbg("event_thread finish command given\n");
|
|
up(&event_semaphore);
|
|
dbg("wait for event_thread to exit\n");
|
|
down(&event_exit);
|
|
}
|
|
|
|
|
|
static int update_slot_info (struct slot *slot)
|
|
{
|
|
struct hotplug_slot_info *info;
|
|
int result;
|
|
|
|
info = kmalloc(sizeof(*info), GFP_KERNEL);
|
|
if (!info)
|
|
return -ENOMEM;
|
|
|
|
slot->hpc_ops->get_power_status(slot, &(info->power_status));
|
|
slot->hpc_ops->get_attention_status(slot, &(info->attention_status));
|
|
slot->hpc_ops->get_latch_status(slot, &(info->latch_status));
|
|
slot->hpc_ops->get_adapter_status(slot, &(info->adapter_status));
|
|
|
|
result = pci_hp_change_slot_info(slot->hotplug_slot, info);
|
|
kfree (info);
|
|
return result;
|
|
}
|
|
|
|
static void interrupt_event_handler(struct controller *ctrl)
|
|
{
|
|
int loop = 0;
|
|
int change = 1;
|
|
struct pci_func *func;
|
|
u8 hp_slot;
|
|
u8 getstatus;
|
|
struct slot *p_slot;
|
|
|
|
dbg("%s:\n", __FUNCTION__);
|
|
while (change) {
|
|
change = 0;
|
|
|
|
for (loop = 0; loop < 10; loop++) {
|
|
if (ctrl->event_queue[loop].event_type != 0) {
|
|
dbg("%s:loop %x event_type %x\n", __FUNCTION__, loop,
|
|
ctrl->event_queue[loop].event_type);
|
|
hp_slot = ctrl->event_queue[loop].hp_slot;
|
|
|
|
func = shpchp_slot_find(ctrl->slot_bus, (hp_slot + ctrl->slot_device_offset), 0);
|
|
|
|
p_slot = shpchp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset);
|
|
|
|
dbg("%s: hp_slot %d, func %p, p_slot %p\n", __FUNCTION__, hp_slot, func, p_slot);
|
|
|
|
if (ctrl->event_queue[loop].event_type == INT_BUTTON_CANCEL) {
|
|
dbg("%s: button cancel\n", __FUNCTION__);
|
|
del_timer(&p_slot->task_event);
|
|
|
|
switch (p_slot->state) {
|
|
case BLINKINGOFF_STATE:
|
|
/* Wait for exclusive access to hardware */
|
|
down(&ctrl->crit_sect);
|
|
|
|
p_slot->hpc_ops->green_led_on(p_slot);
|
|
/* Wait for the command to complete */
|
|
wait_for_ctrl_irq (ctrl);
|
|
|
|
p_slot->hpc_ops->set_attention_status(p_slot, 0);
|
|
|
|
/* Wait for the command to complete */
|
|
wait_for_ctrl_irq (ctrl);
|
|
|
|
/* Done with exclusive hardware access */
|
|
up(&ctrl->crit_sect);
|
|
break;
|
|
case BLINKINGON_STATE:
|
|
/* Wait for exclusive access to hardware */
|
|
down(&ctrl->crit_sect);
|
|
|
|
p_slot->hpc_ops->green_led_off(p_slot);
|
|
/* Wait for the command to complete */
|
|
wait_for_ctrl_irq (ctrl);
|
|
|
|
p_slot->hpc_ops->set_attention_status(p_slot, 0);
|
|
/* Wait for the command to complete */
|
|
wait_for_ctrl_irq (ctrl);
|
|
|
|
/* Done with exclusive hardware access */
|
|
up(&ctrl->crit_sect);
|
|
|
|
break;
|
|
default:
|
|
warn("Not a valid state\n");
|
|
return;
|
|
}
|
|
info(msg_button_cancel, p_slot->number);
|
|
p_slot->state = STATIC_STATE;
|
|
} else if (ctrl->event_queue[loop].event_type == INT_BUTTON_PRESS) {
|
|
/* Button Pressed (No action on 1st press...) */
|
|
dbg("%s: Button pressed\n", __FUNCTION__);
|
|
|
|
p_slot->hpc_ops->get_power_status(p_slot, &getstatus);
|
|
if (getstatus) {
|
|
/* slot is on */
|
|
dbg("%s: slot is on\n", __FUNCTION__);
|
|
p_slot->state = BLINKINGOFF_STATE;
|
|
info(msg_button_off, p_slot->number);
|
|
} else {
|
|
/* slot is off */
|
|
dbg("%s: slot is off\n", __FUNCTION__);
|
|
p_slot->state = BLINKINGON_STATE;
|
|
info(msg_button_on, p_slot->number);
|
|
}
|
|
|
|
/* Wait for exclusive access to hardware */
|
|
down(&ctrl->crit_sect);
|
|
|
|
/* blink green LED and turn off amber */
|
|
p_slot->hpc_ops->green_led_blink(p_slot);
|
|
/* Wait for the command to complete */
|
|
wait_for_ctrl_irq (ctrl);
|
|
|
|
p_slot->hpc_ops->set_attention_status(p_slot, 0);
|
|
|
|
/* Wait for the command to complete */
|
|
wait_for_ctrl_irq (ctrl);
|
|
|
|
/* Done with exclusive hardware access */
|
|
up(&ctrl->crit_sect);
|
|
|
|
init_timer(&p_slot->task_event);
|
|
p_slot->task_event.expires = jiffies + 5 * HZ; /* 5 second delay */
|
|
p_slot->task_event.function = (void (*)(unsigned long)) pushbutton_helper_thread;
|
|
p_slot->task_event.data = (unsigned long) p_slot;
|
|
|
|
dbg("%s: add_timer p_slot = %p\n", __FUNCTION__,(void *) p_slot);
|
|
add_timer(&p_slot->task_event);
|
|
} else if (ctrl->event_queue[loop].event_type == INT_POWER_FAULT) {
|
|
/***********POWER FAULT********************/
|
|
dbg("%s: power fault\n", __FUNCTION__);
|
|
/* Wait for exclusive access to hardware */
|
|
down(&ctrl->crit_sect);
|
|
|
|
p_slot->hpc_ops->set_attention_status(p_slot, 1);
|
|
/* Wait for the command to complete */
|
|
wait_for_ctrl_irq (ctrl);
|
|
|
|
p_slot->hpc_ops->green_led_off(p_slot);
|
|
/* Wait for the command to complete */
|
|
wait_for_ctrl_irq (ctrl);
|
|
|
|
/* Done with exclusive hardware access */
|
|
up(&ctrl->crit_sect);
|
|
} else {
|
|
/* refresh notification */
|
|
if (p_slot)
|
|
update_slot_info(p_slot);
|
|
}
|
|
|
|
ctrl->event_queue[loop].event_type = 0;
|
|
|
|
change = 1;
|
|
}
|
|
} /* End of FOR loop */
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
|
|
int shpchp_enable_slot (struct slot *p_slot)
|
|
{
|
|
u8 getstatus = 0;
|
|
int rc;
|
|
struct pci_func *func;
|
|
|
|
func = shpchp_slot_find(p_slot->bus, p_slot->device, 0);
|
|
if (!func) {
|
|
dbg("%s: Error! slot NULL\n", __FUNCTION__);
|
|
return -ENODEV;
|
|
}
|
|
|
|
/* Check to see if (latch closed, card present, power off) */
|
|
down(&p_slot->ctrl->crit_sect);
|
|
rc = p_slot->hpc_ops->get_adapter_status(p_slot, &getstatus);
|
|
if (rc || !getstatus) {
|
|
info("%s: no adapter on slot(%x)\n", __FUNCTION__, p_slot->number);
|
|
up(&p_slot->ctrl->crit_sect);
|
|
return -ENODEV;
|
|
}
|
|
rc = p_slot->hpc_ops->get_latch_status(p_slot, &getstatus);
|
|
if (rc || getstatus) {
|
|
info("%s: latch open on slot(%x)\n", __FUNCTION__, p_slot->number);
|
|
up(&p_slot->ctrl->crit_sect);
|
|
return -ENODEV;
|
|
}
|
|
rc = p_slot->hpc_ops->get_power_status(p_slot, &getstatus);
|
|
if (rc || getstatus) {
|
|
info("%s: already enabled on slot(%x)\n", __FUNCTION__, p_slot->number);
|
|
up(&p_slot->ctrl->crit_sect);
|
|
return -ENODEV;
|
|
}
|
|
up(&p_slot->ctrl->crit_sect);
|
|
|
|
slot_remove(func);
|
|
|
|
func = shpchp_slot_create(p_slot->bus);
|
|
if (func == NULL)
|
|
return -ENOMEM;
|
|
|
|
func->bus = p_slot->bus;
|
|
func->device = p_slot->device;
|
|
func->function = 0;
|
|
func->configured = 0;
|
|
func->is_a_board = 1;
|
|
|
|
/* We have to save the presence info for these slots */
|
|
p_slot->hpc_ops->get_adapter_status(p_slot, &(func->presence_save));
|
|
p_slot->hpc_ops->get_power_status(p_slot, &(func->pwr_save));
|
|
dbg("%s: func->pwr_save %x\n", __FUNCTION__, func->pwr_save);
|
|
p_slot->hpc_ops->get_latch_status(p_slot, &getstatus);
|
|
func->switch_save = !getstatus? 0x10:0;
|
|
|
|
rc = board_added(func, p_slot->ctrl);
|
|
if (rc) {
|
|
if (is_bridge(func))
|
|
bridge_slot_remove(func);
|
|
else
|
|
slot_remove(func);
|
|
|
|
/* Setup slot structure with entry for empty slot */
|
|
func = shpchp_slot_create(p_slot->bus);
|
|
if (func == NULL)
|
|
return -ENOMEM; /* Out of memory */
|
|
|
|
func->bus = p_slot->bus;
|
|
func->device = p_slot->device;
|
|
func->function = 0;
|
|
func->configured = 0;
|
|
func->is_a_board = 1;
|
|
|
|
/* We have to save the presence info for these slots */
|
|
p_slot->hpc_ops->get_adapter_status(p_slot, &(func->presence_save));
|
|
p_slot->hpc_ops->get_latch_status(p_slot, &getstatus);
|
|
func->switch_save = !getstatus? 0x10:0;
|
|
}
|
|
|
|
if (p_slot)
|
|
update_slot_info(p_slot);
|
|
|
|
return rc;
|
|
}
|
|
|
|
|
|
int shpchp_disable_slot (struct slot *p_slot)
|
|
{
|
|
u8 class_code, header_type, BCR;
|
|
u8 index = 0;
|
|
u8 getstatus = 0;
|
|
u32 rc = 0;
|
|
int ret = 0;
|
|
unsigned int devfn;
|
|
struct pci_bus *pci_bus;
|
|
struct pci_func *func;
|
|
|
|
if (!p_slot->ctrl)
|
|
return -ENODEV;
|
|
|
|
pci_bus = p_slot->ctrl->pci_dev->subordinate;
|
|
|
|
/* Check to see if (latch closed, card present, power on) */
|
|
down(&p_slot->ctrl->crit_sect);
|
|
|
|
ret = p_slot->hpc_ops->get_adapter_status(p_slot, &getstatus);
|
|
if (ret || !getstatus) {
|
|
info("%s: no adapter on slot(%x)\n", __FUNCTION__, p_slot->number);
|
|
up(&p_slot->ctrl->crit_sect);
|
|
return -ENODEV;
|
|
}
|
|
ret = p_slot->hpc_ops->get_latch_status(p_slot, &getstatus);
|
|
if (ret || getstatus) {
|
|
info("%s: latch open on slot(%x)\n", __FUNCTION__, p_slot->number);
|
|
up(&p_slot->ctrl->crit_sect);
|
|
return -ENODEV;
|
|
}
|
|
ret = p_slot->hpc_ops->get_power_status(p_slot, &getstatus);
|
|
if (ret || !getstatus) {
|
|
info("%s: already disabled slot(%x)\n", __FUNCTION__, p_slot->number);
|
|
up(&p_slot->ctrl->crit_sect);
|
|
return -ENODEV;
|
|
}
|
|
up(&p_slot->ctrl->crit_sect);
|
|
|
|
func = shpchp_slot_find(p_slot->bus, p_slot->device, index++);
|
|
|
|
/* Make sure there are no video controllers here
|
|
* for all func of p_slot
|
|
*/
|
|
while (func && !rc) {
|
|
pci_bus->number = func->bus;
|
|
devfn = PCI_DEVFN(func->device, func->function);
|
|
|
|
/* Check the Class Code */
|
|
rc = pci_bus_read_config_byte (pci_bus, devfn, 0x0B, &class_code);
|
|
if (rc)
|
|
return -ENODEV;
|
|
|
|
if (class_code == PCI_BASE_CLASS_DISPLAY) {
|
|
/* Display/Video adapter (not supported) */
|
|
rc = REMOVE_NOT_SUPPORTED;
|
|
} else {
|
|
/* See if it's a bridge */
|
|
rc = pci_bus_read_config_byte (pci_bus, devfn, PCI_HEADER_TYPE, &header_type);
|
|
if (rc)
|
|
return -ENODEV;
|
|
|
|
/* If it's a bridge, check the VGA Enable bit */
|
|
if ((header_type & 0x7F) == PCI_HEADER_TYPE_BRIDGE) {
|
|
rc = pci_bus_read_config_byte (pci_bus, devfn, PCI_BRIDGE_CONTROL, &BCR);
|
|
if (rc)
|
|
return -ENODEV;
|
|
|
|
/* If the VGA Enable bit is set, remove isn't supported */
|
|
if (BCR & PCI_BRIDGE_CTL_VGA) {
|
|
rc = REMOVE_NOT_SUPPORTED;
|
|
}
|
|
}
|
|
}
|
|
|
|
func = shpchp_slot_find(p_slot->bus, p_slot->device, index++);
|
|
}
|
|
|
|
func = shpchp_slot_find(p_slot->bus, p_slot->device, 0);
|
|
if ((func != NULL) && !rc) {
|
|
rc = remove_board(func, p_slot->ctrl);
|
|
} else if (!rc)
|
|
rc = -ENODEV;
|
|
|
|
if (p_slot)
|
|
update_slot_info(p_slot);
|
|
|
|
return rc;
|
|
}
|
|
|