Viewing file:  cpqphp_ctrl.c (78.89 KB) -rw-r--r--
Select action/file-type:
 (+) |  (+) |  (+) | Code (+) | Session (+) |  (+) | SDB (+) |  (+) |  (+) |  (+) |  (+) |  (+) |
/*
* Compaq 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.
*
* 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 <greg@kroah.com>
*
*/
#include <linux/config.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/wait.h>
#include <linux/smp_lock.h>
#include <linux/pci.h>
#include "cpqphp.h"
static u32 configure_new_device(struct controller* ctrl, struct pci_func *func,u8 behind_bridge, struct resource_lists *resources);
static int configure_new_function(struct controller* ctrl, struct pci_func *func,u8 behind_bridge, struct resource_lists *resources);
static void interrupt_event_handler(struct controller *ctrl);
static struct semaphore event_semaphore; /* mutex for process loop (up if something to process) */
static struct semaphore event_exit; /* guard ensure thread has exited before calling it quits */
static int event_finished;
static unsigned long pushbutton_pending; /* = 0 */
/* things needed for the long_delay function */
static struct semaphore delay_sem;
static wait_queue_head_t delay_wait;
/* delay is in jiffies to wait for */
static void long_delay (int delay)
{
DECLARE_WAITQUEUE(wait, current);
/* only allow 1 customer into the delay queue at once
* yes this makes some people wait even longer, but who really cares?
* this is for _huge_ delays to make the hardware happy as the
* signals bounce around
*/
down (&delay_sem);
init_waitqueue_head (&delay_wait);
add_wait_queue(&delay_wait, &wait);
set_current_state(TASK_INTERRUPTIBLE);
schedule_timeout(delay);
remove_wait_queue(&delay_wait, &wait);
set_current_state(TASK_RUNNING);
up (&delay_sem);
}
//FIXME: The following line needs to be somewhere else...
#define WRONG_BUS_FREQUENCY 0x07
static u8 handle_switch_change(u8 change, struct controller * ctrl)
{
int hp_slot;
u8 rc = 0;
u16 temp_word;
struct pci_func *func;
struct event_info *taskInfo;
if (!change)
return 0;
// Switch Change
dbg("cpqsbd: Switch interrupt received.\n");
for (hp_slot = 0; hp_slot < 6; hp_slot++) {
if (change & (0x1L << hp_slot)) {
//*********************************
// this one changed.
//*********************************
func = cpqhp_slot_find(ctrl->bus, (hp_slot + ctrl->slot_device_offset), 0);
//this is the structure that tells the worker thread
//what to do
taskInfo = &(ctrl->event_queue[ctrl->next_event]);
ctrl->next_event = (ctrl->next_event + 1) % 10;
taskInfo->hp_slot = hp_slot;
rc++;
temp_word = ctrl->ctrl_int_comp >> 16;
func->presence_save = (temp_word >> hp_slot) & 0x01;
func->presence_save |= (temp_word >> (hp_slot + 7)) & 0x02;
if (ctrl->ctrl_int_comp & (0x1L << hp_slot)) {
//*********************************
// Switch opened
//*********************************
func->switch_save = 0;
taskInfo->event_type = INT_SWITCH_OPEN;
} else {
//*********************************
// Switch closed
//*********************************
func->switch_save = 0x10;
taskInfo->event_type = INT_SWITCH_CLOSE;
}
}
}
return rc;
}
/*
* find_slot
*/
static inline struct slot *find_slot (struct controller * ctrl, u8 device)
{
struct slot *slot;
if (!ctrl)
return NULL;
slot = ctrl->slot;
while (slot && (slot->device != device)) {
slot = slot->next;
}
return slot;
}
static u8 handle_presence_change(u16 change, struct controller * ctrl)
{
int hp_slot;
u8 rc = 0;
u8 temp_byte;
u16 temp_word;
struct pci_func *func;
struct event_info *taskInfo;
struct slot *p_slot;
if (!change)
return 0;
//*********************************
// Presence Change
//*********************************
dbg("cpqsbd: Presence/Notify input change.\n");
dbg(" Changed bits are 0x%4.4x\n", change );
for (hp_slot = 0; hp_slot < 6; hp_slot++) {
if (change & (0x0101 << hp_slot)) {
//*********************************
// this one changed.
//*********************************
func = cpqhp_slot_find(ctrl->bus, (hp_slot + ctrl->slot_device_offset), 0);
taskInfo = &(ctrl->event_queue[ctrl->next_event]);
ctrl->next_event = (ctrl->next_event + 1) % 10;
taskInfo->hp_slot = hp_slot;
rc++;
p_slot = find_slot(ctrl, hp_slot + (readb(ctrl->hpc_reg + SLOT_MASK) >> 4));
// If the switch closed, must be a button
// If not in button mode, nevermind
if (func->switch_save && (ctrl->push_button == 1)) {
temp_word = ctrl->ctrl_int_comp >> 16;
temp_byte = (temp_word >> hp_slot) & 0x01;
temp_byte |= (temp_word >> (hp_slot + 7)) & 0x02;
if (temp_byte != func->presence_save) {
//*********************************
// button Pressed (doesn't do anything)
//*********************************
dbg("hp_slot %d button pressed\n", hp_slot);
taskInfo->event_type = INT_BUTTON_PRESS;
} else {
//*********************************
// button Released - TAKE ACTION!!!!
//*********************************
dbg("hp_slot %d button released\n", hp_slot);
taskInfo->event_type = INT_BUTTON_RELEASE;
// Cancel if we are still blinking
if ((p_slot->state == BLINKINGON_STATE)
|| (p_slot->state == BLINKINGOFF_STATE)) {
taskInfo->event_type = INT_BUTTON_CANCEL;
dbg("hp_slot %d button cancel\n", hp_slot);
} else if ((p_slot->state == POWERON_STATE)
|| (p_slot->state == POWEROFF_STATE)) {
//info(msg_button_ignore, p_slot->number);
taskInfo->event_type = INT_BUTTON_IGNORE;
dbg("hp_slot %d button ignore\n", hp_slot);
}
}
} else {
// Switch is open, assume a presence change
// Save the presence state
temp_word = ctrl->ctrl_int_comp >> 16;
func->presence_save = (temp_word >> hp_slot) & 0x01;
func->presence_save |= (temp_word >> (hp_slot + 7)) & 0x02;
if ((!(ctrl->ctrl_int_comp & (0x010000 << hp_slot))) ||
(!(ctrl->ctrl_int_comp & (0x01000000 << hp_slot)))) {
//*********************************
// Present
//*********************************
taskInfo->event_type = INT_PRESENCE_ON;
} else {
//*********************************
// Not Present
//*********************************
taskInfo->event_type = INT_PRESENCE_OFF;
}
}
}
}
return rc;
}
static u8 handle_power_fault(u8 change, struct controller * ctrl)
{
int hp_slot;
u8 rc = 0;
struct pci_func *func;
struct event_info *taskInfo;
if (!change)
return 0;
//*********************************
// power fault
//*********************************
info("power fault interrupt\n");
for (hp_slot = 0; hp_slot < 6; hp_slot++) {
if (change & (0x01 << hp_slot)) {
//*********************************
// this one changed.
//*********************************
func = cpqhp_slot_find(ctrl->bus, (hp_slot + ctrl->slot_device_offset), 0);
taskInfo = &(ctrl->event_queue[ctrl->next_event]);
ctrl->next_event = (ctrl->next_event + 1) % 10;
taskInfo->hp_slot = hp_slot;
rc++;
if (ctrl->ctrl_int_comp & (0x00000100 << hp_slot)) {
//*********************************
// power fault Cleared
//*********************************
func->status = 0x00;
taskInfo->event_type = INT_POWER_FAULT_CLEAR;
} else {
//*********************************
// power fault
//*********************************
taskInfo->event_type = INT_POWER_FAULT;
if (ctrl->rev < 4) {
amber_LED_on (ctrl, hp_slot);
green_LED_off (ctrl, hp_slot);
set_SOGO (ctrl);
// this is a fatal condition, we want to crash the
// machine to protect from data corruption
// simulated_NMI shouldn't ever return
//FIXME
//simulated_NMI(hp_slot, ctrl);
//The following code causes a software crash just in
//case simulated_NMI did return
//FIXME
//panic(msg_power_fault);
} else {
// set power fault status for this board
func->status = 0xFF;
info("power fault bit %x set\n", hp_slot);
}
}
}
}
return rc;
}
/*
* sort_by_size
*
* Sorts nodes on the list by their length.
* Smallest first.
*
*/
static int sort_by_size(struct pci_resource **head)
{
struct pci_resource *current_res;
struct pci_resource *next_res;
int out_of_order = 1;
if (!(*head))
return(1);
if (!((*head)->next))
return(0);
while (out_of_order) {
out_of_order = 0;
// Special case for swapping list head
if (((*head)->next) &&
((*head)->length > (*head)->next->length)) {
out_of_order++;
current_res = *head;
*head = (*head)->next;
current_res->next = (*head)->next;
(*head)->next = current_res;
}
current_res = *head;
while (current_res->next && current_res->next->next) {
if (current_res->next->length > current_res->next->next->length) {
out_of_order++;
next_res = current_res->next;
current_res->next = current_res->next->next;
current_res = current_res->next;
next_res->next = current_res->next;
current_res->next = next_res;
} else
current_res = current_res->next;
}
} // End of out_of_order loop
return(0);
}
/*
* sort_by_max_size
*
* Sorts nodes on the list by their length.
* Largest first.
*
*/
static int sort_by_max_size(struct pci_resource **head)
{
struct pci_resource *current_res;
struct pci_resource *next_res;
int out_of_order = 1;
if (!(*head))
return(1);
if (!((*head)->next))
return(0);
while (out_of_order) {
out_of_order = 0;
// Special case for swapping list head
if (((*head)->next) &&
((*head)->length < (*head)->next->length)) {
out_of_order++;
current_res = *head;
*head = (*head)->next;
current_res->next = (*head)->next;
(*head)->next = current_res;
}
current_res = *head;
while (current_res->next && current_res->next->next) {
if (current_res->next->length < current_res->next->next->length) {
out_of_order++;
next_res = current_res->next;
current_res->next = current_res->next->next;
current_res = current_res->next;
next_res->next = current_res->next;
current_res->next = next_res;
} else
current_res = current_res->next;
}
} // End of out_of_order loop
return(0);
}
/*
* do_pre_bridge_resource_split
*
* Returns zero or one node of resources that aren't in use
*
*/
static struct pci_resource *do_pre_bridge_resource_split (struct pci_resource **head, struct pci_resource **orig_head, u32 alignment)
{
struct pci_resource *prevnode = NULL;
struct pci_resource *node;
struct pci_resource *split_node;
u32 rc;
u32 temp_dword;
dbg("do_pre_bridge_resource_split\n");
if (!(*head) || !(*orig_head))
return(NULL);
rc = cpqhp_resource_sort_and_combine(head);
if (rc)
return(NULL);
if ((*head)->base != (*orig_head)->base)
return(NULL);
if ((*head)->length == (*orig_head)->length)
return(NULL);
// If we got here, there the bridge requires some of the resource, but
// we may be able to split some off of the front
node = *head;
if (node->length & (alignment -1)) {
// this one isn't an aligned length, so we'll make a new entry
// and split it up.
split_node = (struct pci_resource*) kmalloc(sizeof(struct pci_resource), GFP_KERNEL);
if (!split_node)
return(NULL);
temp_dword = (node->length | (alignment-1)) + 1 - alignment;
split_node->base = node->base;
split_node->length = temp_dword;
node->length -= temp_dword;
node->base += split_node->length;
// Put it in the list
*head = split_node;
split_node->next = node;
}
if (node->length < alignment) {
return(NULL);
}
// Now unlink it
if (*head == node) {
*head = node->next;
node->next = NULL;
} else {
prevnode = *head;
while (prevnode->next != node)
prevnode = prevnode->next;
prevnode->next = node->next;
node->next = NULL;
}
return(node);
}
/*
* do_bridge_resource_split
*
* Returns zero or one node of resources that aren't in use
*
*/
static struct pci_resource *do_bridge_resource_split (struct pci_resource **head, u32 alignment)
{
struct pci_resource *prevnode = NULL;
struct pci_resource *node;
u32 rc;
u32 temp_dword;
if (!(*head))
return(NULL);
rc = cpqhp_resource_sort_and_combine(head);
if (rc)
return(NULL);
node = *head;
while (node->next) {
prevnode = node;
node = node->next;
kfree(prevnode);
}
if (node->length < alignment) {
kfree(node);
return(NULL);
}
if (node->base & (alignment - 1)) {
// Short circuit if adjusted size is too small
temp_dword = (node->base | (alignment-1)) + 1;
if ((node->length - (temp_dword - node->base)) < alignment) {
kfree(node);
return(NULL);
}
node->length -= (temp_dword - node->base);
node->base = temp_dword;
}
if (node->length & (alignment - 1)) {
// There's stuff in use after this node
kfree(node);
return(NULL);
}
return(node);
}
/*
* get_io_resource
*
* this function sorts the resource list by size and then
* returns the first node of "size" length that is not in the
* ISA aliasing window. If it finds a node larger than "size"
* it will split it up.
*
* size must be a power of two.
*/
static struct pci_resource *get_io_resource (struct pci_resource **head, u32 size)
{
struct pci_resource *prevnode;
struct pci_resource *node;
struct pci_resource *split_node;
u32 temp_dword;
if (!(*head))
return(NULL);
if ( cpqhp_resource_sort_and_combine(head) )
return(NULL);
if ( sort_by_size(head) )
return(NULL);
for (node = *head; node; node = node->next) {
if (node->length < size)
continue;
if (node->base & (size - 1)) {
// this one isn't base aligned properly
// so we'll make a new entry and split it up
temp_dword = (node->base | (size-1)) + 1;
// Short circuit if adjusted size is too small
if ((node->length - (temp_dword - node->base)) < size)
continue;
split_node = (struct pci_resource*) kmalloc(sizeof(struct pci_resource), GFP_KERNEL);
if (!split_node)
return(NULL);
split_node->base = node->base;
split_node->length = temp_dword - node->base;
node->base = temp_dword;
node->length -= split_node->length;
// Put it in the list
split_node->next = node->next;
node->next = split_node;
} // End of non-aligned base
// Don't need to check if too small since we already did
if (node->length > size) {
// this one is longer than we need
// so we'll make a new entry and split it up
split_node = (struct pci_resource*) kmalloc(sizeof(struct pci_resource), GFP_KERNEL);
if (!split_node)
return(NULL);
split_node->base = node->base + size;
split_node->length = node->length - size;
node->length = size;
// Put it in the list
split_node->next = node->next;
node->next = split_node;
} // End of too big on top end
// For IO make sure it's not in the ISA aliasing space
if (node->base & 0x300L)
continue;
// If we got here, then it is the right size
// Now take it out of the list
if (*head == node) {
*head = node->next;
} else {
prevnode = *head;
while (prevnode->next != node)
prevnode = prevnode->next;
prevnode->next = node->next;
}
node->next = NULL;
// Stop looping
break;
}
return(node);
}
/*
* get_max_resource
*
* Gets the largest node that is at least "size" big from the
* list pointed to by head. It aligns the node on top and bottom
* to "size" alignment before returning it.
*/
static struct pci_resource *get_max_resource (struct pci_resource **head, u32 size)
{
struct pci_resource *max;
struct pci_resource *temp;
struct pci_resource *split_node;
u32 temp_dword;
if (!(*head))
return(NULL);
if (cpqhp_resource_sort_and_combine(head))
return(NULL);
if (sort_by_max_size(head))
return(NULL);
for (max = *head;max; max = max->next) {
// If not big enough we could probably just bail,
// instead we'll continue to the next.
if (max->length < size)
continue;
if (max->base & (size - 1)) {
// this one isn't base aligned properly
// so we'll make a new entry and split it up
temp_dword = (max->base | (size-1)) + 1;
// Short circuit if adjusted size is too small
if ((max->length - (temp_dword - max->base)) < size)
continue;
split_node = (struct pci_resource*) kmalloc(sizeof(struct pci_resource), GFP_KERNEL);
if (!split_node)
return(NULL);
split_node->base = max->base;
split_node->length = temp_dword - max->base;
max->base = temp_dword;
max->length -= split_node->length;
// Put it next in the list
split_node->next = max->next;
max->next = split_node;
}
if ((max->base + max->length) & (size - 1)) {
// this one isn't end aligned properly at the top
// so we'll make a new entry and split it up
split_node = (struct pci_resource*) kmalloc(sizeof(struct pci_resource), GFP_KERNEL);
if (!split_node)
return(NULL);
temp_dword = ((max->base + max->length) & ~(size - 1));
split_node->base = temp_dword;
split_node->length = max->length + max->base
- split_node->base;
max->length -= split_node->length;
// Put it in the list
split_node->next = max->next;
max->next = split_node;
}
// Make sure it didn't shrink too much when we aligned it
if (max->length < size)
continue;
// Now take it out of the list
temp = (struct pci_resource*) *head;
if (temp == max) {
*head = max->next;
} else {
while (temp && temp->next != max) {
temp = temp->next;
}
temp->next = max->next;
}
max->next = NULL;
return(max);
}
// If we get here, we couldn't find one
return(NULL);
}
/*
* get_resource
*
* this function sorts the resource list by size and then
* returns the first node of "size" length. If it finds a node
* larger than "size" it will split it up.
*
* size must be a power of two.
*/
static struct pci_resource *get_resource (struct pci_resource **head, u32 size)
{
struct pci_resource *prevnode;
struct pci_resource *node;
struct pci_resource *split_node;
u32 temp_dword;
if (!(*head))
return(NULL);
if ( cpqhp_resource_sort_and_combine(head) )
return(NULL);
if ( sort_by_size(head) )
return(NULL);
for (node = *head; node; node = node->next) {
dbg(__FUNCTION__": req_size =%x node=%p, base=%x, length=%x\n",
size, node, node->base, node->length);
if (node->length < size)
continue;
if (node->base & (size - 1)) {
dbg(__FUNCTION__": not aligned\n");
// this one isn't base aligned properly
// so we'll make a new entry and split it up
temp_dword = (node->base | (size-1)) + 1;
// Short circuit if adjusted size is too small
if ((node->length - (temp_dword - node->base)) < size)
continue;
split_node = (struct pci_resource*) kmalloc(sizeof(struct pci_resource), GFP_KERNEL);
if (!split_node)
return(NULL);
split_node->base = node->base;
split_node->length = temp_dword - node->base;
node->base = temp_dword;
node->length -= split_node->length;
// Put it in the list
split_node->next = node->next;
node->next = split_node;
} // End of non-aligned base
// Don't need to check if too small since we already did
if (node->length > size) {
dbg(__FUNCTION__": too big\n");
// this one is longer than we need
// so we'll make a new entry and split it up
split_node = (struct pci_resource*) kmalloc(sizeof(struct pci_resource), GFP_KERNEL);
if (!split_node)
return(NULL);
split_node->base = node->base + size;
split_node->length = node->length - size;
node->length = size;
// Put it in the list
split_node->next = node->next;
node->next = split_node;
} // End of too big on top end
dbg(__FUNCTION__": got one!!!\n");
// If we got here, then it is the right size
// Now take it out of the list
if (*head == node) {
*head = node->next;
} else {
prevnode = *head;
while (prevnode->next != node)
prevnode = prevnode->next;
prevnode->next = node->next;
}
node->next = NULL;
// Stop looping
break;
}
return(node);
}
/*
* cpqhp_resource_sort_and_combine
*
* Sorts all of the nodes in the list in ascending order by
* their base addresses. Also does garbage collection by
* combining adjacent nodes.
*
* returns 0 if success
*/
int cpqhp_resource_sort_and_combine(struct pci_resource **head)
{
struct pci_resource *node1;
struct pci_resource *node2;
int out_of_order = 1;
dbg(__FUNCTION__": head = %p, *head = %p\n", head, *head);
if (!(*head))
return(1);
dbg("*head->next = %p\n",(*head)->next);
if (!(*head)->next)
return(0); /* only one item on the list, already sorted! */
dbg("*head->base = 0x%x\n",(*head)->base);
dbg("*head->next->base = 0x%x\n",(*head)->next->base);
while (out_of_order) {
out_of_order = 0;
// Special case for swapping list head
if (((*head)->next) &&
((*head)->base > (*head)->next->base)) {
node1 = *head;
(*head) = (*head)->next;
node1->next = (*head)->next;
(*head)->next = node1;
out_of_order++;
}
node1 = (*head);
while (node1->next && node1->next->next) {
if (node1->next->base > node1->next->next->base) {
out_of_order++;
node2 = node1->next;
node1->next = node1->next->next;
node1 = node1->next;
node2->next = node1->next;
node1->next = node2;
} else
node1 = node1->next;
}
} // End of out_of_order loop
node1 = *head;
while (node1 && node1->next) {
if ((node1->base + node1->length) == node1->next->base) {
// Combine
dbg("8..\n");
node1->length += node1->next->length;
node2 = node1->next;
node1->next = node1->next->next;
kfree(node2);
} else
node1 = node1->next;
}
return(0);
}
void cpqhp_ctrl_intr(int IRQ, struct controller * ctrl, struct pt_regs *regs)
{
u8 schedule_flag = 0;
u16 misc;
u32 Diff;
u32 temp_dword;
misc = readw(ctrl->hpc_reg + MISC);
//*********************************
// Check to see if it was our interrupt
//*********************************
if (!(misc & 0x000C)) {
return;
}
if (misc & 0x0004) {
//*********************************
// Serial Output interrupt Pending
//*********************************
// Clear the interrupt
misc |= 0x0004;
writew(misc, ctrl->hpc_reg + MISC);
// Read to clear posted writes
misc = readw(ctrl->hpc_reg + MISC);
dbg (__FUNCTION__" - waking up\n");
wake_up_interruptible(&ctrl->queue);
}
if (misc & 0x0008) {
// General-interrupt-input interrupt Pending
Diff = readl(ctrl->hpc_reg + INT_INPUT_CLEAR) ^ ctrl->ctrl_int_comp;
ctrl->ctrl_int_comp = readl(ctrl->hpc_reg + INT_INPUT_CLEAR);
// Clear the interrupt
writel(Diff, ctrl->hpc_reg + INT_INPUT_CLEAR);
// Read it back to clear any posted writes
temp_dword = readl(ctrl->hpc_reg + INT_INPUT_CLEAR);
if (!Diff) {
// Clear all interrupts
writel(0xFFFFFFFF, ctrl->hpc_reg + INT_INPUT_CLEAR);
}
schedule_flag += handle_switch_change((u8)(Diff & 0xFFL), ctrl);
schedule_flag += handle_presence_change((u16)((Diff & 0xFFFF0000L) >> 16), ctrl);
schedule_flag += handle_power_fault((u8)((Diff & 0xFF00L) >> 8), ctrl);
}
if (schedule_flag) {
up(&event_semaphore);
dbg("Signal event_semaphore\n");
mark_bh(IMMEDIATE_BH);
}
}
/**
* cpqhp_slot_create - Creates a node and adds it to the proper bus.
* @busnumber - bus where new node is to be located
*
* Returns pointer to the new node or NULL if unsuccessful
*/
struct pci_func *cpqhp_slot_create(u8 busnumber)
{
struct pci_func *new_slot;
struct pci_func *next;
new_slot = (struct pci_func *) kmalloc(sizeof(struct pci_func), GFP_KERNEL);
if (new_slot == NULL) {
// I'm not dead yet!
// You will be.
return(new_slot);
}
memset(new_slot, 0, sizeof(struct pci_func));
new_slot->next = NULL;
new_slot->configured = 1;
if (cpqhp_slot_list[busnumber] == NULL) {
cpqhp_slot_list[busnumber] = new_slot;
} else {
next = cpqhp_slot_list[busnumber];
while (next->next != NULL)
next = next->next;
next->next = new_slot;
}
return(new_slot);
}
/*
* slot_remove - Removes a node from the linked list of slots.
* @old_slot: slot to remove
*
* Returns 0 if successful, !0 otherwise.
*/
static int slot_remove(struct pci_func * old_slot)
{
struct pci_func *next;
if (old_slot == NULL)
return(1);
next = cpqhp_slot_list[old_slot->bus];
if (next == NULL) {
return(1);
}
if (next == old_slot) {
cpqhp_slot_list[old_slot->bus] = old_slot->next;
cpqhp_destroy_board_resources(old_slot);
kfree(old_slot);
return(0);
}
while ((next->next != old_slot) && (next->next != NULL)) {
next = next->next;
}
if (next->next == old_slot) {
next->next = old_slot->next;
cpqhp_destroy_board_resources(old_slot);
kfree(old_slot);
return(0);
} else
return(2);
}
/**
* bridge_slot_remove - Removes a node from the linked list of slots.
* @bridge: bridge to remove
*
* Returns 0 if successful, !0 otherwise.
*/
static int bridge_slot_remove(struct pci_func *bridge)
{
u8 subordinateBus, secondaryBus;
u8 tempBus;
struct pci_func *next;
if (bridge == NULL)
return(1);
secondaryBus = (bridge->config_space[0x06] >> 8) & 0xFF;
subordinateBus = (bridge->config_space[0x06] >> 16) & 0xFF;
for (tempBus = secondaryBus; tempBus <= subordinateBus; tempBus++) {
next = cpqhp_slot_list[tempBus];
while (!slot_remove(next)) {
next = cpqhp_slot_list[tempBus];
}
}
next = cpqhp_slot_list[bridge->bus];
if (next == NULL) {
return(1);
}
if (next == bridge) {
cpqhp_slot_list[bridge->bus] = bridge->next;
kfree(bridge);
return(0);
}
while ((next->next != bridge) && (next->next != NULL)) {
next = next->next;
}
if (next->next == bridge) {
next->next = bridge->next;
kfree(bridge);
return(0);
} else
return(2);
}
/**
* cpqhp_slot_find - Looks for a node by bus, and device, multiple functions accessed
* @bus: bus to find
* @device: device to find
* @index: is 0 for first function found, 1 for the second...
*
* Returns pointer to the node if successful, %NULL otherwise.
*/
struct pci_func *cpqhp_slot_find(u8 bus, u8 device, u8 index)
{
int found = -1;
struct pci_func *func;
func = cpqhp_slot_list[bus];
if ((func == NULL) || ((func->device == device) && (index == 0)))
return(func);
if (func->device == device)
found++;
while (func->next != NULL) {
func = func->next;
if (func->device == device)
found++;
if (found == index)
return(func);
}
return(NULL);
}
// DJZ: I don't think is_bridge will work as is.
//FIXME
static int is_bridge(struct pci_func * func)
{
// Check the header type
if (((func->config_space[0x03] >> 16) & 0xFF) == 0x01)
return 1;
else
return 0;
}
/* the following routines constitute the bulk of the
hotplug controller logic
*/
/**
* board_replaced - Called after a board has been replaced in the system.
*
* This is only used if we don't have resources for hot add
* Turns power on for the board
* Checks to see if board is the same
* If board is same, reconfigures it
* If board isn't same, turns it back off.
*
*/
static u32 board_replaced(struct pci_func * func, struct controller * ctrl)
{
u8 hp_slot;
u8 temp_byte;
u32 index;
u32 rc = 0;
u32 src = 8;
hp_slot = func->device - ctrl->slot_device_offset;
if (readl(ctrl->hpc_reg + INT_INPUT_CLEAR) & (0x01L << hp_slot)) {
//*********************************
// The switch is open.
//*********************************
rc = INTERLOCK_OPEN;
} else if (is_slot_enabled (ctrl, hp_slot)) {
//*********************************
// The board is already on
//*********************************
rc = CARD_FUNCTIONING;
} else {
if (ctrl->speed == 1) {
// Wait for exclusive access to hardware
down(&ctrl->crit_sect);
// turn on board without attaching to the bus
enable_slot_power (ctrl, hp_slot);
set_SOGO(ctrl);
// Wait for SOBS to be unset
wait_for_ctrl_irq (ctrl);
// Change bits in slot power register to force another shift out
// NOTE: this is to work around the timer bug
temp_byte = readb(ctrl->hpc_reg + SLOT_POWER);
writeb(0x00, ctrl->hpc_reg + SLOT_POWER);
writeb(temp_byte, ctrl->hpc_reg + SLOT_POWER);
set_SOGO(ctrl);
// Wait for SOBS to be unset
wait_for_ctrl_irq (ctrl);
if (!(readl(ctrl->hpc_reg + NON_INT_INPUT) & (0x01 << hp_slot))) {
rc = WRONG_BUS_FREQUENCY;
}
// turn off board without attaching to the bus
disable_slot_power (ctrl, hp_slot);
set_SOGO(ctrl);
// Wait for SOBS to be unset
wait_for_ctrl_irq (ctrl);
// Done with exclusive hardware access
up(&ctrl->crit_sect);
if (rc)
return(rc);
}
// Wait for exclusive access to hardware
down(&ctrl->crit_sect);
slot_enable (ctrl, hp_slot);
green_LED_blink (ctrl, hp_slot);
amber_LED_off (ctrl, hp_slot);
set_SOGO(ctrl);
// Wait for SOBS to be unset
wait_for_ctrl_irq (ctrl);
// Done with exclusive hardware access
up(&ctrl->crit_sect);
// Wait for ~1 second because of hot plug spec
long_delay(1*HZ);
// Check for a power fault
if (func->status == 0xFF) {
// power fault occurred, but it was benign
rc = POWER_FAILURE;
func->status = 0;
} else
rc = cpqhp_valid_replace(ctrl, func);
if (!rc) {
// It must be the same board
rc = cpqhp_configure_board(ctrl, func);
if (rc || src) {
// If configuration fails, turn it off
// Get slot won't work for devices behind bridges, but
// in this case it will always be called for the "base"
// bus/dev/func of an adapter.
// Wait for exclusive access to hardware
down(&ctrl->crit_sect);
amber_LED_on (ctrl, hp_slot);
green_LED_off (ctrl, hp_slot);
slot_disable (ctrl, hp_slot);
set_SOGO(ctrl);
// Wait for SOBS to be unset
wait_for_ctrl_irq (ctrl);
// Done with exclusive hardware access
up(&ctrl->crit_sect);
if (rc)
return(rc);
else
return(1);
}
func->status = 0;
func->switch_save = 0x10;
index = 1;
while (((func = cpqhp_slot_find(func->bus, func->device, index)) != NULL) && !rc) {
rc |= cpqhp_configure_board(ctrl, func);
index++;
}
if (rc) {
// If configuration fails, turn it off
// Get slot won't work for devices behind bridges, but
// in this case it will always be called for the "base"
// bus/dev/func of an adapter.
// Wait for exclusive access to hardware
down(&ctrl->crit_sect);
amber_LED_on (ctrl, hp_slot);
green_LED_off (ctrl, hp_slot);
slot_disable (ctrl, hp_slot);
set_SOGO(ctrl);
// Wait for SOBS to be unset
wait_for_ctrl_irq (ctrl);
// Done with exclusive hardware access
up(&ctrl->crit_sect);
return(rc);
}
// Done configuring so turn LED on full time
// Wait for exclusive access to hardware
down(&ctrl->crit_sect);
green_LED_on (ctrl, hp_slot);
set_SOGO(ctrl);
// Wait for SOBS to be unset
wait_for_ctrl_irq (ctrl);
// Done with exclusive hardware access
up(&ctrl->crit_sect);
rc = 0;
} else {
// Something is wrong
// Get slot won't work for devices behind bridges, but
// in this case it will always be called for the "base"
// bus/dev/func of an adapter.
// Wait for exclusive access to hardware
down(&ctrl->crit_sect);
amber_LED_on (ctrl, hp_slot);
green_LED_off (ctrl, hp_slot);
slot_disable (ctrl, hp_slot);
set_SOGO(ctrl);
// Wait for SOBS to be unset
wait_for_ctrl_irq (ctrl);
// Done with exclusive hardware access
up(&ctrl->crit_sect);
}
}
return(rc);
}
/**
* board_added - Called after a board has been added to the system.
*
* Turns power on for the board
* Configures board
*
*/
static u32 board_added(struct pci_func * func, struct controller * ctrl)
{
u8 hp_slot;
u8 temp_byte;
int index;
u32 temp_register = 0xFFFFFFFF;
u32 rc = 0;
struct pci_func *new_slot = NULL;
struct slot *p_slot;
struct resource_lists res_lists;
hp_slot = func->device - ctrl->slot_device_offset;
dbg(__FUNCTION__": func->device, slot_offset, hp_slot = %d, %d ,%d\n",
func->device, ctrl->slot_device_offset, hp_slot);
if (ctrl->speed == 1) {
// Wait for exclusive access to hardware
down(&ctrl->crit_sect);
// turn on board without attaching to the bus
enable_slot_power (ctrl, hp_slot);
set_SOGO(ctrl);
// Wait for SOBS to be unset
wait_for_ctrl_irq (ctrl);
// Change bits in slot power register to force another shift out
// NOTE: this is to work around the timer bug
temp_byte = readb(ctrl->hpc_reg + SLOT_POWER);
writeb(0x00, ctrl->hpc_reg + SLOT_POWER);
writeb(temp_byte, ctrl->hpc_reg + SLOT_POWER);
set_SOGO(ctrl);
// Wait for SOBS to be unset
wait_for_ctrl_irq (ctrl);
if (!(readl(ctrl->hpc_reg + NON_INT_INPUT) & (0x01 << hp_slot))) {
rc = WRONG_BUS_FREQUENCY;
}
// turn off board without attaching to the bus
disable_slot_power (ctrl, hp_slot);
set_SOGO(ctrl);
// Wait for SOBS to be unset
wait_for_ctrl_irq (ctrl);
// Done with exclusive hardware access
up(&ctrl->crit_sect);
if (rc)
return(rc);
}
p_slot = find_slot(ctrl, hp_slot + ctrl->slot_device_offset);
// turn on board and blink green LED
// Wait for exclusive access to hardware
dbg(__FUNCTION__": before down\n");
down(&ctrl->crit_sect);
dbg(__FUNCTION__": after down\n");
dbg(__FUNCTION__": before slot_enable\n");
slot_enable (ctrl, hp_slot);
dbg(__FUNCTION__": before green_LED_blink\n");
green_LED_blink (ctrl, hp_slot);
dbg(__FUNCTION__": before amber_LED_blink\n");
amber_LED_off (ctrl, hp_slot);
dbg(__FUNCTION__": before set_SOGO\n");
set_SOGO(ctrl);
// Wait for SOBS to be unset
dbg(__FUNCTION__": before wait_for_ctrl_irq\n");
wait_for_ctrl_irq (ctrl);
dbg(__FUNCTION__": after wait_for_ctrl_irq\n");
// Done with exclusive hardware access
dbg(__FUNCTION__": before up\n");
up(&ctrl->crit_sect);
dbg(__FUNCTION__": after up\n");
// Wait for ~1 second because of hot plug spec
dbg(__FUNCTION__": before long_delay\n");
long_delay(1*HZ);
dbg(__FUNCTION__": after long_delay\n");
dbg(__FUNCTION__": func status = %x\n", func->status);
// Check for a power fault
if (func->status == 0xFF) {
// power fault occurred, but it was benign
temp_register = 0xFFFFFFFF;
dbg(__FUNCTION__": temp register set to %x by power fault\n", temp_register);
rc = POWER_FAILURE;
func->status = 0;
} else {
// Get vendor/device ID u32
rc = pci_read_config_dword_nodev (ctrl->pci_ops, func->bus, func->device, func->function, PCI_VENDOR_ID, &temp_register);
dbg(__FUNCTION__": pci_read_config_dword returns %d\n", rc);
dbg(__FUNCTION__": temp_register is %x\n", temp_register);
if (rc != 0) {
// Something's wrong here
temp_register = 0xFFFFFFFF;
dbg(__FUNCTION__": temp register set to %x by error\n", temp_register);
}
// Preset return code. It will be changed later if things go okay.
rc = NO_ADAPTER_PRESENT;
}
// All F's is an empty slot or an invalid board
if (temp_register != 0xFFFFFFFF) { // Check for a board in the slot
res_lists.io_head = ctrl->io_head;
res_lists.mem_head = ctrl->mem_head;
res_lists.p_mem_head = ctrl->p_mem_head;
res_lists.bus_head = ctrl->bus_head;
res_lists.irqs = NULL;
rc = configure_new_device(ctrl, func, 0, &res_lists);
dbg(__FUNCTION__": back from configure_new_device\n");
ctrl->io_head = res_lists.io_head;
ctrl->mem_head = res_lists.mem_head;
ctrl->p_mem_head = res_lists.p_mem_head;
ctrl->bus_head = res_lists.bus_head;
cpqhp_resource_sort_and_combine(&(ctrl->mem_head));
cpqhp_resource_sort_and_combine(&(ctrl->p_mem_head));
cpqhp_resource_sort_and_combine(&(ctrl->io_head));
cpqhp_resource_sort_and_combine(&(ctrl->bus_head));
if (rc) {
// Wait for exclusive access to hardware
down(&ctrl->crit_sect);
amber_LED_on (ctrl, hp_slot);
green_LED_off (ctrl, hp_slot);
slot_disable (ctrl, hp_slot);
set_SOGO(ctrl);
// Wait for SOBS to be unset
wait_for_ctrl_irq (ctrl);
// Done with exclusive hardware access
up(&ctrl->crit_sect);
return(rc);
} else {
cpqhp_save_slot_config(ctrl, func);
}
func->status = 0;
func->switch_save = 0x10;
func->is_a_board = 0x01;
//next, we will instantiate the linux pci_dev structures (with appropriate driver notification, if already present)
dbg(__FUNCTION__": configure linux pci_dev structure\n");
index = 0;
do {
new_slot = cpqhp_slot_find(ctrl->bus, func->device, index++);
if (new_slot && !new_slot->pci_dev) {
cpqhp_configure_device(ctrl, new_slot);
}
} while (new_slot);
// Wait for exclusive access to hardware
down(&ctrl->crit_sect);
green_LED_on (ctrl, hp_slot);
set_SOGO(ctrl);
// Wait for SOBS to be unset
wait_for_ctrl_irq (ctrl);
// Done with exclusive hardware access
up(&ctrl->crit_sect);
} else {
// Wait for exclusive access to hardware
down(&ctrl->crit_sect);
amber_LED_on (ctrl, hp_slot);
green_LED_off (ctrl, hp_slot);
slot_disable (ctrl, hp_slot);
set_SOGO(ctrl);
// Wait for SOBS to be unset
wait_for_ctrl_irq (ctrl);
// Done with exclusive hardware access
up(&ctrl->crit_sect);
return(rc);
}
return 0;
}
/**
* remove_board - Turns off slot and LED's
*
*/
static u32 remove_board(struct pci_func * func, u32 replace_flag, struct controller * ctrl)
{
int index;
u8 skip = 0;
u8 device;
u8 hp_slot;
u8 temp_byte;
u32 rc;
struct resource_lists res_lists;
struct pci_func *temp_func;
if (func == NULL)
return(1);
if (cpqhp_unconfigure_device(func))
return(1);
device = func->device;
hp_slot = func->device - ctrl->slot_device_offset;
dbg("In "__FUNCTION__", hp_slot = %d\n", hp_slot);
// When we get here, it is safe to change base Address Registers.
// We will attempt to save the base Address Register Lengths
if (replace_flag || !ctrl->add_support)
rc = cpqhp_save_base_addr_length(ctrl, func);
else if (!func->bus_head && !func->mem_head &&
!func->p_mem_head && !func->io_head) {
// Here we check to see if we've saved any of the board's
// resources already. If so, we'll skip the attempt to
// determine what's being used.
index = 0;
temp_func = cpqhp_slot_find(func->bus, func->device, index++);
while (temp_func) {
if (temp_func->bus_head || temp_func->mem_head
|| temp_func->p_mem_head || temp_func->io_head) {
skip = 1;
break;
}
temp_func = cpqhp_slot_find(temp_func->bus, temp_func->device, index++);
}
if (!skip)
rc = cpqhp_save_used_resources(ctrl, func);
}
// 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);
green_LED_off (ctrl, hp_slot);
slot_disable (ctrl, hp_slot);
set_SOGO(ctrl);
// turn off SERR for slot
temp_byte = readb(ctrl->hpc_reg + SLOT_SERR);
temp_byte &= ~(0x01 << hp_slot);
writeb(temp_byte, ctrl->hpc_reg + SLOT_SERR);
// Wait for SOBS to be unset
wait_for_ctrl_irq (ctrl);
// Done with exclusive hardware access
up(&ctrl->crit_sect);
if (!replace_flag && ctrl->add_support) {
while (func) {
res_lists.io_head = ctrl->io_head;
res_lists.mem_head = ctrl->mem_head;
res_lists.p_mem_head = ctrl->p_mem_head;
res_lists.bus_head = ctrl->bus_head;
cpqhp_return_board_resources(func, &res_lists);
ctrl->io_head = res_lists.io_head;
ctrl->mem_head = res_lists.mem_head;
ctrl->p_mem_head = res_lists.p_mem_head;
ctrl->bus_head = res_lists.bus_head;
cpqhp_resource_sort_and_combine(&(ctrl->mem_head));
cpqhp_resource_sort_and_combine(&(ctrl->p_mem_head));
cpqhp_resource_sort_and_combine(&(ctrl->io_head));
cpqhp_resource_sort_and_combine(&(ctrl->bus_head));
if (is_bridge(func)) {
bridge_slot_remove(func);
} else
slot_remove(func);
func = cpqhp_slot_find(ctrl->bus, device, 0);
}
// Setup slot structure with entry for empty slot
func = cpqhp_slot_create(ctrl->bus);
if (func == NULL) {
// Out of memory
return(1);
}
func->bus = ctrl->bus;
func->device = device;
func->function = 0;
func->configured = 0;
func->switch_save = 0x10;
func->is_a_board = 0;
func->p_task_event = NULL;
}
return 0;
}
static void pushbutton_helper_thread (unsigned long data)
{
pushbutton_pending = data;
up(&event_semaphore);
}
// this is the main worker thread
static int event_thread(void* data)
{
struct controller *ctrl;
lock_kernel();
daemonize();
// New name
strcpy(current->comm, "phpd_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) break;
/* Do stuff here */
if (pushbutton_pending)
cpqhp_pushbutton_thread(pushbutton_pending);
else
for (ctrl = cpqhp_ctrl_list; ctrl; ctrl=ctrl->next)
interrupt_event_handler(ctrl);
}
dbg("event_thread signals exit\n");
up(&event_exit);
return 0;
}
int cpqhp_event_start_thread (void)
{
int pid;
/* initialize our semaphores */
init_MUTEX(&delay_sem);
init_MUTEX_LOCKED(&event_semaphore);
init_MUTEX_LOCKED(&event_exit);
event_finished=0;
pid = kernel_thread(event_thread, 0, 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 cpqhp_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 controller *ctrl, struct slot *slot)
{
struct hotplug_slot_info *info;
char buffer[SLOT_NAME_SIZE];
int result;
info = kmalloc (sizeof (struct hotplug_slot_info), GFP_KERNEL);
if (!info)
return -ENOMEM;
make_slot_name (&buffer[0], SLOT_NAME_SIZE, slot);
info->power_status = get_slot_enabled(ctrl, slot);
info->attention_status = cpq_get_attention_status(ctrl, slot);
info->latch_status = cpq_get_latch_status(ctrl, slot);
info->adapter_status = get_presence_status(ctrl, slot);
result = pci_hp_change_slot_info(buffer, 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;
struct slot *p_slot;
while (change) {
change = 0;
for (loop = 0; loop < 10; loop++) {
//dbg("loop %d\n", loop);
if (ctrl->event_queue[loop].event_type != 0) {
hp_slot = ctrl->event_queue[loop].hp_slot;
func = cpqhp_slot_find(ctrl->bus, (hp_slot + ctrl->slot_device_offset), 0);
p_slot = find_slot(ctrl, hp_slot + ctrl->slot_device_offset);
dbg("hp_slot %d, func %p, p_slot %p\n",
hp_slot, func, p_slot);
if (ctrl->event_queue[loop].event_type == INT_BUTTON_PRESS) {
dbg("button pressed\n");
} else if (ctrl->event_queue[loop].event_type ==
INT_BUTTON_CANCEL) {
dbg("button cancel\n");
del_timer(&p_slot->task_event);
// Wait for exclusive access to hardware
down(&ctrl->crit_sect);
if (p_slot->state == BLINKINGOFF_STATE) {
// slot is on
// turn on green LED
dbg("turn on green LED\n");
green_LED_on (ctrl, hp_slot);
} else if (p_slot->state == BLINKINGON_STATE) {
// slot is off
// turn off green LED
dbg("turn off green LED\n");
green_LED_off (ctrl, hp_slot);
}
info(msg_button_cancel, p_slot->number);
p_slot->state = STATIC_STATE;
amber_LED_off (ctrl, hp_slot);
set_SOGO(ctrl);
// Wait for SOBS to be unset
wait_for_ctrl_irq (ctrl);
// Done with exclusive hardware access
up(&ctrl->crit_sect);
}
// ***********button Released (No action on press...)
else if (ctrl->event_queue[loop].event_type == INT_BUTTON_RELEASE) {
dbg("button release\n");
if (is_slot_enabled (ctrl, hp_slot)) {
// slot is on
dbg("slot is on\n");
p_slot->state = BLINKINGOFF_STATE;
info(msg_button_off, p_slot->number);
} else {
// slot is off
dbg("slot is off\n");
p_slot->state = BLINKINGON_STATE;
info(msg_button_on, p_slot->number);
}
// Wait for exclusive access to hardware
down(&ctrl->crit_sect);
dbg("blink green LED and turn off amber\n");
amber_LED_off (ctrl, hp_slot);
green_LED_blink (ctrl, hp_slot);
set_SOGO(ctrl);
// Wait for SOBS to be unset
wait_for_ctrl_irq (ctrl);
// Done with exclusive hardware access
up(&ctrl->crit_sect);
init_timer(&p_slot->task_event);
p_slot->hp_slot = hp_slot;
p_slot->ctrl = ctrl;
// p_slot->physical_slot = physical_slot;
p_slot->task_event.expires = jiffies + 5 * HZ; // 5 second delay
p_slot->task_event.function = pushbutton_helper_thread;
p_slot->task_event.data = (u32) p_slot;
dbg("add_timer p_slot = %p\n", p_slot);
add_timer(&p_slot->task_event);
}
// ***********POWER FAULT
else if (ctrl->event_queue[loop].event_type == INT_POWER_FAULT) {
dbg("power fault\n");
} else {
/* refresh notification */
if (p_slot)
update_slot_info(ctrl, p_slot);
}
ctrl->event_queue[loop].event_type = 0;
change = 1;
}
} // End of FOR loop
}
return;
}
/**
* cpqhp_pushbutton_thread
*
* Scheduled procedure to handle blocking stuff for the pushbuttons
* Handles all pending events and exits.
*
*/
void cpqhp_pushbutton_thread (unsigned long slot)
{
u8 hp_slot;
u8 device;
struct pci_func *func;
struct slot *p_slot = (struct slot *) slot;
struct controller *ctrl = (struct controller *) p_slot->ctrl;
pushbutton_pending = 0;
hp_slot = p_slot->hp_slot;
device = p_slot->device;
if (is_slot_enabled (ctrl, hp_slot)) {
p_slot->state = POWEROFF_STATE;
// power Down board
func = cpqhp_slot_find(p_slot->bus, p_slot->device, 0);
dbg("In power_down_board, func = %p, ctrl = %p\n", func, ctrl);
if (!func) {
dbg("Error! func NULL in "__FUNCTION__"\n");
return ;
}
if (func != NULL && ctrl != NULL) {
if (cpqhp_process_SS(ctrl, func) != 0) {
amber_LED_on (ctrl, hp_slot);
green_LED_on (ctrl, hp_slot);
set_SOGO(ctrl);
// Wait for SOBS to be unset
wait_for_ctrl_irq (ctrl);
}
}
p_slot->state = STATIC_STATE;
} else {
p_slot->state = POWERON_STATE;
// slot is off
func = cpqhp_slot_find(p_slot->bus, p_slot->device, 0);
dbg("In add_board, func = %p, ctrl = %p\n", func, ctrl);
if (!func) {
dbg("Error! func NULL in "__FUNCTION__"\n");
return ;
}
if (func != NULL && ctrl != NULL) {
if (cpqhp_process_SI(ctrl, func) != 0) {
amber_LED_on (ctrl, hp_slot);
green_LED_off (ctrl, hp_slot);
set_SOGO(ctrl);
// Wait for SOBS to be unset
wait_for_ctrl_irq (ctrl);
}
}
p_slot->state = STATIC_STATE;
}
return;
}
int cpqhp_process_SI (struct controller *ctrl, struct pci_func *func)
{
u8 device, hp_slot;
u16 temp_word;
u32 tempdword;
int rc;
struct slot* p_slot;
int physical_slot = 0;
if (!ctrl)
return(1);
tempdword = 0;
device = func->device;
hp_slot = device - ctrl->slot_device_offset;
p_slot = find_slot(ctrl, device);
if (p_slot) {
physical_slot = p_slot->number;
}
// Check to see if the interlock is closed
tempdword = readl(ctrl->hpc_reg + INT_INPUT_CLEAR);
if (tempdword & (0x01 << hp_slot)) {
return(1);
}
if (func->is_a_board) {
rc = board_replaced(func, ctrl);
} else {
// add board
slot_remove(func);
func = cpqhp_slot_create(ctrl->bus);
if (func == NULL) {
return(1);
}
func->bus = ctrl->bus;
func->device = device;
func->function = 0;
func->configured = 0;
func->is_a_board = 1;
// We have to save the presence info for these slots
temp_word = ctrl->ctrl_int_comp >> 16;
func->presence_save = (temp_word >> hp_slot) & 0x01;
func->presence_save |= (temp_word >> (hp_slot + 7)) & 0x02;
if (ctrl->ctrl_int_comp & (0x1L << hp_slot)) {
func->switch_save = 0;
} else {
func->switch_save = 0x10;
}
rc = board_added(func, ctrl);
if (rc) {
if (is_bridge(func)) {
bridge_slot_remove(func);
} else
slot_remove(func);
// Setup slot structure with entry for empty slot
func = cpqhp_slot_create(ctrl->bus);
if (func == NULL) {
// Out of memory
return(1);
}
func->bus = ctrl->bus;
func->device = device;
func->function = 0;
func->configured = 0;
func->is_a_board = 0;
// We have to save the presence info for these slots
temp_word = ctrl->ctrl_int_comp >> 16;
func->presence_save = (temp_word >> hp_slot) & 0x01;
func->presence_save |=
(temp_word >> (hp_slot + 7)) & 0x02;
if (ctrl->ctrl_int_comp & (0x1L << hp_slot)) {
func->switch_save = 0;
} else {
func->switch_save = 0x10;
}
}
}
if (rc) {
dbg(__FUNCTION__": rc = %d\n", rc);
}
if (p_slot)
update_slot_info(ctrl, p_slot);
return rc;
}
int cpqhp_process_SS (struct controller *ctrl, struct pci_func *func)
{
u8 device, class_code, header_type, BCR;
u8 index = 0;
u8 replace_flag;
u32 rc = 0;
struct slot* p_slot;
int physical_slot=0;
device = func->device;
func = cpqhp_slot_find(ctrl->bus, device, index++);
p_slot = find_slot(ctrl, device);
if (p_slot) {
physical_slot = p_slot->number;
}
// Make sure there are no video controllers here
while (func && !rc) {
// Check the Class Code
rc = pci_read_config_byte_nodev (ctrl->pci_ops, func->bus, func->device, func->function, 0x0B, &class_code);
if (rc)
return rc;
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_read_config_byte_nodev (ctrl->pci_ops, func->bus, func->device, func->function, PCI_HEADER_TYPE, &header_type);
if (rc)
return rc;
// If it's a bridge, check the VGA Enable bit
if ((header_type & 0x7F) == PCI_HEADER_TYPE_BRIDGE) {
rc = pci_read_config_byte_nodev (ctrl->pci_ops, func->bus, func->device, func->function, PCI_BRIDGE_CONTROL, &BCR);
if (rc)
return rc;
// If the VGA Enable bit is set, remove isn't supported
if (BCR & PCI_BRIDGE_CTL_VGA) {
rc = REMOVE_NOT_SUPPORTED;
}
}
}
func = cpqhp_slot_find(ctrl->bus, device, index++);
}
func = cpqhp_slot_find(ctrl->bus, device, 0);
if ((func != NULL) && !rc) {
//FIXME: Replace flag should be passed into process_SS
replace_flag = !(ctrl->add_support);
rc = remove_board(func, replace_flag, ctrl);
} else if (!rc) {
rc = 1;
}
if (p_slot)
update_slot_info(ctrl, p_slot);
return(rc);
}
/**
* hardware_test - runs hardware tests
*
* For hot plug ctrl folks to play with.
* test_num is the number entered in the GUI
*
*/
int cpqhp_hardware_test(struct controller *ctrl, int test_num)
{
u32 save_LED;
u32 work_LED;
int loop;
int num_of_slots;
num_of_slots = readb(ctrl->hpc_reg + SLOT_MASK) & 0x0f;
switch (test_num) {
case 1:
// Do stuff here!
// Do that funky LED thing
save_LED = readl(ctrl->hpc_reg + LED_CONTROL); // so we can restore them later
work_LED = 0x01010101;
writel(work_LED, ctrl->hpc_reg + LED_CONTROL);
for (loop = 0; loop < num_of_slots; loop++) {
set_SOGO(ctrl);
// Wait for SOGO interrupt
wait_for_ctrl_irq (ctrl);
// Get ready for next iteration
work_LED = work_LED << 1;
writel(work_LED, ctrl->hpc_reg + LED_CONTROL);
long_delay((2*HZ)/10);
}
for (loop = 0; loop < num_of_slots; loop++) {
work_LED = work_LED >> 1;
writel(work_LED, ctrl->hpc_reg + LED_CONTROL);
set_SOGO(ctrl);
// Wait for SOGO interrupt
wait_for_ctrl_irq (ctrl);
// Get ready for next iteration
long_delay((2*HZ)/10);
}
for (loop = 0; loop < num_of_slots; loop++) {
work_LED = work_LED << 1;
writel(work_LED, ctrl->hpc_reg + LED_CONTROL);
set_SOGO(ctrl);
// Wait for SOGO interrupt
wait_for_ctrl_irq (ctrl);
// Get ready for next iteration
long_delay((2*HZ)/10);
}
for (loop = 0; loop < num_of_slots; loop++) {
work_LED = work_LED >> 1;
writel(work_LED, ctrl->hpc_reg + LED_CONTROL);
set_SOGO(ctrl);
// Wait for SOGO interrupt
wait_for_ctrl_irq (ctrl);
// Get ready for next iteration
long_delay((2*HZ)/10);
}
work_LED = 0x01010000;
writel(work_LED, ctrl->hpc_reg + LED_CONTROL);
for (loop = 0; loop < num_of_slots; loop++) {
set_SOGO(ctrl);
// Wait for SOGO interrupt
wait_for_ctrl_irq (ctrl);
// Get ready for next iteration
work_LED = work_LED << 1;
writel(work_LED, ctrl->hpc_reg + LED_CONTROL);
long_delay((2*HZ)/10);
}
for (loop = 0; loop < num_of_slots; loop++) {
work_LED = work_LED >> 1;
writel(work_LED, ctrl->hpc_reg + LED_CONTROL);
set_SOGO(ctrl);
// Wait for SOGO interrupt
wait_for_ctrl_irq (ctrl);
// Get ready for next iteration
long_delay((2*HZ)/10);
}
work_LED = 0x00000101;
writel(work_LED, ctrl->hpc_reg + LED_CONTROL);
for (loop = 0; loop < num_of_slots; loop++) {
work_LED = work_LED << 1;
writel(work_LED, ctrl->hpc_reg + LED_CONTROL);
set_SOGO(ctrl);
// Wait for SOGO interrupt
wait_for_ctrl_irq (ctrl);
// Get ready for next iteration
long_delay((2*HZ)/10);
}
for (loop = 0; loop < num_of_slots; loop++) {
work_LED = work_LED >> 1;
writel(work_LED, ctrl->hpc_reg + LED_CONTROL);
set_SOGO(ctrl);
// Wait for SOGO interrupt
wait_for_ctrl_irq (ctrl);
// Get ready for next iteration
long_delay((2*HZ)/10);
}
work_LED = 0x01010000;
writel(work_LED, ctrl->hpc_reg + LED_CONTROL);
for (loop = 0; loop < num_of_slots; loop++) {
set_SOGO(ctrl);
// Wait for SOGO interrupt
wait_for_ctrl_irq (ctrl);
// Get ready for next iteration
long_delay((3*HZ)/10);
work_LED = work_LED >> 16;
writel(work_LED, ctrl->hpc_reg + LED_CONTROL);
set_SOGO(ctrl);
// Wait for SOGO interrupt
wait_for_ctrl_irq (ctrl);
// Get ready for next iteration
long_delay((3*HZ)/10);
work_LED = work_LED << 16;
writel(work_LED, ctrl->hpc_reg + LED_CONTROL);
work_LED = work_LED << 1;
writel(work_LED, ctrl->hpc_reg + LED_CONTROL);
}
writel (save_LED, ctrl->hpc_reg + LED_CONTROL); // put it back the way it was
set_SOGO(ctrl);
// Wait for SOBS to be unset
wait_for_ctrl_irq (ctrl);
break;
case 2:
// Do other stuff here!
break;
case 3:
// and more...
break;
}
return 0;
}
/**
* configure_new_device - Configures the PCI header information of one board.
*
* @ctrl: pointer to controller structure
* @func: pointer to function structure
* @behind_bridge: 1 if this is a recursive call, 0 if not
* @resources: pointer to set of resource lists
*
* Returns 0 if success
*
*/
static u32 configure_new_device (struct controller * ctrl, struct pci_func * func,
u8 behind_bridge, struct resource_lists * resources)
{
u8 temp_byte, function, max_functions, stop_it;
int rc;
u32 ID;
struct pci_func *new_slot;
int index;
new_slot = func;
dbg(__FUNCTION__"\n");
// Check for Multi-function device
rc = pci_read_config_byte_nodev (ctrl->pci_ops, func->bus, func->device, func->function, 0x0E, &temp_byte);
if (rc) {
dbg(__FUNCTION__": rc = %d\n", rc);
return rc;
}
if (temp_byte & 0x80) // Multi-function device
max_functions = 8;
else
max_functions = 1;
function = 0;
do {
rc = configure_new_function(ctrl, new_slot, behind_bridge, resources);
if (rc) {
dbg("configure_new_function failed %d\n",rc);
index = 0;
while (new_slot) {
new_slot = cpqhp_slot_find(new_slot->bus, new_slot->device, index++);
if (new_slot)
cpqhp_return_board_resources(new_slot, resources);
}
return(rc);
}
function++;
stop_it = 0;
// The following loop skips to the next present function
// and creates a board structure
while ((function < max_functions) && (!stop_it)) {
pci_read_config_dword_nodev (ctrl->pci_ops, func->bus, func->device, function, 0x00, &ID);
if (ID == 0xFFFFFFFF) { // There's nothing there.
function++;
} else { // There's something there
// Setup slot structure.
new_slot = cpqhp_slot_create(func->bus);
if (new_slot == NULL) {
// Out of memory
return(1);
}
new_slot->bus = func->bus;
new_slot->device = func->device;
new_slot->function = function;
new_slot->is_a_board = 1;
new_slot->status = 0;
stop_it++;
}
}
} while (function < max_functions);
dbg("returning from configure_new_device\n");
return 0;
}
/*
Configuration logic that involves the hotplug data structures and
their bookkeeping
*/
/**
* configure_new_function - Configures the PCI header information of one device
*
* @ctrl: pointer to controller structure
* @func: pointer to function structure
* @behind_bridge: 1 if this is a recursive call, 0 if not
* @resources: pointer to set of resource lists
*
* Calls itself recursively for bridged devices.
* Returns 0 if success
*
*/
static int configure_new_function (struct controller * ctrl, struct pci_func * func,
u8 behind_bridge, struct resource_lists * resources)
{
int cloop;
u8 IRQ;
u8 temp_byte;
u8 device;
u8 class_code;
u16 command;
u16 temp_word;
u32 temp_dword;
u32 rc;
u32 temp_register;
u32 base;
u32 ID;
struct pci_resource *mem_node;
struct pci_resource *p_mem_node;
struct pci_resource *io_node;
struct pci_resource *bus_node;
struct pci_resource *hold_mem_node;
struct pci_resource *hold_p_mem_node;
struct pci_resource *hold_IO_node;
struct pci_resource *hold_bus_node;
struct irq_mapping irqs;
struct pci_func *new_slot;
struct resource_lists temp_resources;
// Check for Bridge
rc = pci_read_config_byte_nodev (ctrl->pci_ops, func->bus, func->device, func->function, PCI_HEADER_TYPE, &temp_byte);
if (rc)
return rc;
if ((temp_byte & 0x7F) == PCI_HEADER_TYPE_BRIDGE) { // PCI-PCI Bridge
// set Primary bus
dbg("set Primary bus = %d\n", func->bus);
rc = pci_write_config_byte_nodev(ctrl->pci_ops, func->bus, func->device, func->function, PCI_PRIMARY_BUS, func->bus);
if (rc)
return rc;
// find range of busses to use
dbg("find ranges of buses to use\n");
bus_node = get_max_resource(&resources->bus_head, 1);
// If we don't have any busses to allocate, we can't continue
if (!bus_node)
return -ENOMEM;
// set Secondary bus
temp_byte = bus_node->base;
dbg("set Secondary bus = %d\n", bus_node->base);
rc = pci_write_config_byte_nodev(ctrl->pci_ops, func->bus, func->device, func->function, PCI_SECONDARY_BUS, temp_byte);
if (rc)
return rc;
// set subordinate bus
temp_byte = bus_node->base + bus_node->length - 1;
dbg("set subordinate bus = %d\n", bus_node->base + bus_node->length - 1);
rc = pci_write_config_byte_nodev(ctrl->pci_ops, func->bus, func->device, func->function, PCI_SUBORDINATE_BUS, temp_byte);
if (rc)
return rc;
// set subordinate Latency Timer and base Latency Timer
temp_byte = 0x40;
rc = pci_write_config_byte_nodev(ctrl->pci_ops, func->bus, func->device, func->function, PCI_SEC_LATENCY_TIMER, temp_byte);
if (rc)
return rc;
rc = pci_write_config_byte_nodev(ctrl->pci_ops, func->bus, func->device, func->function, PCI_LATENCY_TIMER, temp_byte);
if (rc)
return rc;
// set Cache Line size
temp_byte = 0x08;
rc = pci_write_config_byte_nodev(ctrl->pci_ops, func->bus, func->device, func->function, PCI_CACHE_LINE_SIZE, temp_byte);
if (rc)
return rc;
// Setup the IO, memory, and prefetchable windows
io_node = get_max_resource(&(resources->io_head), 0x1000);
mem_node = get_max_resource(&(resources->mem_head), 0x100000);
p_mem_node = get_max_resource(&(resources->p_mem_head), 0x100000);
dbg("Setup the IO, memory, and prefetchable windows\n");
dbg("io_node\n");
dbg("(base, len, next) (%x, %x, %p)\n", io_node->base, io_node->length, io_node->next);
dbg("mem_node\n");
dbg("(base, len, next) (%x, %x, %p)\n", mem_node->base, mem_node->length, mem_node->next);
dbg("p_mem_node\n");
dbg("(base, len, next) (%x, %x, %p)\n", p_mem_node->base, p_mem_node->length, p_mem_node->next);
// set up the IRQ info
if (!resources->irqs) {
irqs.barber_pole = 0;
irqs.interrupt[0] = 0;
irqs.interrupt[1] = 0;
irqs.interrupt[2] = 0;
irqs.interrupt[3] = 0;
irqs.valid_INT = 0;
} else {
irqs.barber_pole = resources->irqs->barber_pole;
irqs.interrupt[0] = resources->irqs->interrupt[0];
irqs.interrupt[1] = resources->irqs->interrupt[1];
irqs.interrupt[2] = resources->irqs->interrupt[2];
irqs.interrupt[3] = resources->irqs->interrupt[3];
irqs.valid_INT = resources->irqs->valid_INT;
}
// set up resource lists that are now aligned on top and bottom
// for anything behind the bridge.
temp_resources.bus_head = bus_node;
temp_resources.io_head = io_node;
temp_resources.mem_head = mem_node;
temp_resources.p_mem_head = p_mem_node;
temp_resources.irqs = &irqs;
// Make copies of the nodes we are going to pass down so that
// if there is a problem,we can just use these to free resources
hold_bus_node = (struct pci_resource *) kmalloc(sizeof(struct pci_resource), GFP_KERNEL);
hold_IO_node = (struct pci_resource *) kmalloc(sizeof(struct pci_resource), GFP_KERNEL);
hold_mem_node = (struct pci_resource *) kmalloc(sizeof(struct pci_resource), GFP_KERNEL);
hold_p_mem_node = (struct pci_resource *) kmalloc(sizeof(struct pci_resource), GFP_KERNEL);
if (!hold_bus_node || !hold_IO_node || !hold_mem_node || !hold_p_mem_node) {
if (hold_bus_node)
kfree(hold_bus_node);
if (hold_IO_node)
kfree(hold_IO_node);
if (hold_mem_node)
kfree(hold_mem_node);
if (hold_p_mem_node)
kfree(hold_p_mem_node);
return(1);
}
memcpy(hold_bus_node, bus_node, sizeof(struct pci_resource));
bus_node->base += 1;
bus_node->length -= 1;
bus_node->next = NULL;
// If we have IO resources copy them and fill in the bridge's
// IO range registers
if (io_node) {
memcpy(hold_IO_node, io_node, sizeof(struct pci_resource));
io_node->next = NULL;
// set IO base and Limit registers
temp_byte = io_node->base >> 8;
rc = pci_write_config_byte_nodev(ctrl->pci_ops, func->bus, func->device, func->function, PCI_IO_BASE, temp_byte);
temp_byte = (io_node->base + io_node->length - 1) >> 8;
rc = pci_write_config_byte_nodev(ctrl->pci_ops, func->bus, func->device, func->function, PCI_IO_LIMIT, temp_byte);
} else {
kfree(hold_IO_node);
hold_IO_node = NULL;
}
// If we have memory resources copy them and fill in the bridge's
// memory range registers. Otherwise, fill in the range
// registers with values that disable them.
if (mem_node) {
memcpy(hold_mem_node, mem_node, sizeof(struct pci_resource));
mem_node->next = NULL;
// set Mem base and Limit registers
temp_word = mem_node->base >> 16;
rc = pci_write_config_word_nodev(ctrl->pci_ops, func->bus, func->device, func->function, PCI_MEMORY_BASE, temp_word);
temp_word = (mem_node->base + mem_node->length - 1) >> 16;
rc = pci_write_config_word_nodev(ctrl->pci_ops, func->bus, func->device, func->function, PCI_MEMORY_LIMIT, temp_word);
} else {
temp_word = 0xFFFF;
rc = pci_write_config_word_nodev(ctrl->pci_ops, func->bus, func->device, func->function, PCI_MEMORY_BASE, temp_word);
temp_word = 0x0000;
rc = pci_write_config_word_nodev(ctrl->pci_ops, func->bus, func->device, func->function, PCI_MEMORY_LIMIT, temp_word);
kfree(hold_mem_node);
hold_mem_node = NULL;
}
// If we have prefetchable memory resources copy them and
// fill in the bridge's memory range registers. Otherwise,
// fill in the range registers with values that disable them.
if (p_mem_node) {
memcpy(hold_p_mem_node, p_mem_node, sizeof(struct pci_resource));
p_mem_node->next = NULL;
// set Pre Mem base and Limit registers
temp_word = p_mem_node->base >> 16;
rc = pci_write_config_word_nodev(ctrl->pci_ops, func->bus, func->device, func->function, PCI_PREF_MEMORY_BASE, temp_word);
temp_word = (p_mem_node->base + p_mem_node->length - 1) >> 16;
rc = pci_write_config_word_nodev(ctrl->pci_ops, func->bus, func->device, func->function, PCI_PREF_MEMORY_LIMIT, temp_word);
} else {
temp_word = 0xFFFF;
rc = pci_write_config_word_nodev(ctrl->pci_ops, func->bus, func->device, func->function, PCI_PREF_MEMORY_BASE, temp_word);
temp_word = 0x0000;
rc = pci_write_config_word_nodev(ctrl->pci_ops, func->bus, func->device, func->function, PCI_PREF_MEMORY_LIMIT, temp_word);
kfree(hold_p_mem_node);
hold_p_mem_node = NULL;
}
// Adjust this to compensate for extra adjustment in first loop
irqs.barber_pole--;
rc = 0;
// Here we actually find the devices and configure them
for (device = 0; (device <= 0x1F) && !rc; device++) {
irqs.barber_pole = (irqs.barber_pole + 1) & 0x03;
ID = 0xFFFFFFFF;
pci_read_config_dword_nodev (ctrl->pci_ops, hold_bus_node->base, device, 0, 0x00, &ID);
if (ID != 0xFFFFFFFF) { // device Present
// Setup slot structure.
new_slot = cpqhp_slot_create(hold_bus_node->base);
if (new_slot == NULL) {
// Out of memory
rc = -ENOMEM;
continue;
}
new_slot->bus = hold_bus_node->base;
new_slot->device = device;
new_slot->function = 0;
new_slot->is_a_board = 1;
new_slot->status = 0;
rc = configure_new_device(ctrl, new_slot, 1, &temp_resources);
dbg("configure_new_device rc=0x%x\n",rc);
} // End of IF (device in slot?)
} // End of FOR loop
if (rc) {
cpqhp_destroy_resource_list(&temp_resources);
return_resource(&(resources->bus_head), hold_bus_node);
return_resource(&(resources->io_head), hold_IO_node);
return_resource(&(resources->mem_head), hold_mem_node);
return_resource(&(resources->p_mem_head), hold_p_mem_node);
return(rc);
}
// save the interrupt routing information
if (resources->irqs) {
resources->irqs->interrupt[0] = irqs.interrupt[0];
resources->irqs->interrupt[1] = irqs.interrupt[1];
resources->irqs->interrupt[2] = irqs.interrupt[2];
resources->irqs->interrupt[3] = irqs.interrupt[3];
resources->irqs->valid_INT = irqs.valid_INT;
} else if (!behind_bridge) {
// We need to hook up the interrupts here
for (cloop = 0; cloop < 4; cloop++) {
if (irqs.valid_INT & (0x01 << cloop)) {
rc = cpqhp_set_irq(func->bus, func->device,
0x0A + cloop, irqs.interrupt[cloop]);
if (rc) {
cpqhp_destroy_resource_list (&temp_resources);
return_resource(&(resources-> bus_head), hold_bus_node);
return_resource(&(resources-> io_head), hold_IO_node);
return_resource(&(resources-> mem_head), hold_mem_node);
return_resource(&(resources-> p_mem_head), hold_p_mem_node);
return rc;
}
}
} // end of for loop
}
// Return unused bus resources
// First use the temporary node to store information for the board
if (hold_bus_node && bus_node && temp_resources.bus_head) {
hold_bus_node->length = bus_node->base - hold_bus_node->base;
hold_bus_node->next = func->bus_head;
func->bus_head = hold_bus_node;
temp_byte = temp_resources.bus_head->base - 1;
// set subordinate bus
rc = pci_write_config_byte_nodev(ctrl->pci_ops, func->bus, func->device, func->function, PCI_SUBORDINATE_BUS, temp_byte);
if (temp_resources.bus_head->length == 0) {
kfree(temp_resources.bus_head);
temp_resources.bus_head = NULL;
} else {
return_resource(&(resources->bus_head), temp_resources.bus_head);
}
}
// If we have IO space available and there is some left,
// return the unused portion
if (hold_IO_node && temp_resources.io_head) {
io_node = do_pre_bridge_resource_split(&(temp_resources.io_head),
&hold_IO_node, 0x1000);
// Check if we were able to split something off
if (io_node) {
hold_IO_node->base = io_node->base + io_node->length;
temp_byte = (hold_IO_node->base) >> 8;
rc = pci_write_config_word_nodev(ctrl->pci_ops, func->bus, func->device, func->function, PCI_IO_BASE, temp_byte);
return_resource(&(resources->io_head), io_node);
}
io_node = do_bridge_resource_split(&(temp_resources.io_head), 0x1000);
// Check if we were able to split something off
if (io_node) {
// First use the temporary node to store information for the board
hold_IO_node->length = io_node->base - hold_IO_node->base;
// If we used any, add it to the board's list
if (hold_IO_node->length) {
hold_IO_node->next = func->io_head;
func->io_head = hold_IO_node;
temp_byte = (io_node->base - 1) >> 8;
rc = pci_write_config_byte_nodev(ctrl->pci_ops, func->bus, func->device, func->function, PCI_IO_LIMIT, temp_byte);
return_resource(&(resources->io_head), io_node);
} else {
// it doesn't need any IO
temp_word = 0x0000;
pci_write_config_word_nodev(ctrl->pci_ops, func->bus, func->device, func->function, PCI_IO_LIMIT, temp_word);
return_resource(&(resources->io_head), io_node);
kfree(hold_IO_node);
}
} else {
// it used most of the range
hold_IO_node->next = func->io_head;
func->io_head = hold_IO_node;
}
} else if (hold_IO_node) {
// it used the whole range
hold_IO_node->next = func->io_head;
func->io_head = hold_IO_node;
}
// If we have memory space available and there is some left,
// return the unused portion
if (hold_mem_node && temp_resources.mem_head) {
mem_node = do_pre_bridge_resource_split(&(temp_resources. mem_head),
&hold_mem_node, 0x100000);
// Check if we were able to split something off
if (mem_node) {
hold_mem_node->base = mem_node->base + mem_node->length;
temp_word = (hold_mem_node->base) >> 16;
rc = pci_write_config_word_nodev(ctrl->pci_ops, func->bus, func->device, func->function, PCI_MEMORY_BASE, temp_word);
return_resource(&(resources->mem_head), mem_node);
}
mem_node = do_bridge_resource_split(&(temp_resources.mem_head), 0x100000);
// Check if we were able to split something off
if (mem_node) {
// First use the temporary node to store information for the board
hold_mem_node->length = mem_node->base - hold_mem_node->base;
if (hold_mem_node->length) {
hold_mem_node->next = func->mem_head;
func->mem_head = hold_mem_node;
// configure end address
temp_word = (mem_node->base - 1) >> 16;
rc = pci_write_config_word_nodev(ctrl->pci_ops, func->bus, func->device, func->function, PCI_MEMORY_LIMIT, temp_word);
// Return unused resources to the pool
return_resource(&(resources->mem_head), mem_node);
} else {
// it doesn't need any Mem
temp_word = 0x0000;
rc = pci_write_config_word_nodev(ctrl->pci_ops, func->bus, func->device, func->function, PCI_MEMORY_LIMIT, temp_word);
return_resource(&(resources->mem_head), mem_node);
kfree(hold_mem_node);
}
} else {
// it used most of the range
hold_mem_node->next = func->mem_head;
func->mem_head = hold_mem_node;
}
} else if (hold_mem_node) {
// it used the whole range
hold_mem_node->next = func->mem_head;
func->mem_head = hold_mem_node;
}
// If we have prefetchable memory space available and there is some
// left at the end, return the unused portion
if (hold_p_mem_node && temp_resources.p_mem_head) {
p_mem_node = do_pre_bridge_resource_split(&(temp_resources.p_mem_head),
&hold_p_mem_node, 0x100000);
// Check if we were able to split something off
if (p_mem_node) {
hold_p_mem_node->base = p_mem_node->base + p_mem_node->length;
temp_word = (hold_p_mem_node->base) >> 16;
rc = pci_write_config_word_nodev(ctrl->pci_ops, func->bus, func->device, func->function, PCI_PREF_MEMORY_BASE, temp_word);
return_resource(&(resources->p_mem_head), p_mem_node);
}
p_mem_node = do_bridge_resource_split(&(temp_resources.p_mem_head), 0x100000);
// Check if we were able to split something off
if (p_mem_node) {
// First use the temporary node to store information for the board
hold_p_mem_node->length = p_mem_node->base - hold_p_mem_node->base;
// If we used any, add it to the board's list
if (hold_p_mem_node->length) {
hold_p_mem_node->next = func->p_mem_head;
func->p_mem_head = hold_p_mem_node;
temp_word = (p_mem_node->base - 1) >> 16;
rc = pci_write_config_word_nodev(ctrl->pci_ops, func->bus, func->device, func->function, PCI_PREF_MEMORY_LIMIT, temp_word);
return_resource(&(resources->p_mem_head), p_mem_node);
} else {
// it doesn't need any PMem
temp_word = 0x0000;
rc = pci_write_config_word_nodev(ctrl->pci_ops, func->bus, func->device, func->function, PCI_PREF_MEMORY_LIMIT, temp_word);
return_resource(&(resources->p_mem_head), p_mem_node);
kfree(hold_p_mem_node);
}
} else {
// it used the most of the range
hold_p_mem_node->next = func->p_mem_head;
func->p_mem_head = hold_p_mem_node;
}
} else if (hold_p_mem_node) {
// it used the whole range
hold_p_mem_node->next = func->p_mem_head;
func->p_mem_head = hold_p_mem_node;
}
// We should be configuring an IRQ and the bridge's base address
// registers if it needs them. Although we have never seen such
// a device
// enable card
command = 0x0157; // = PCI_COMMAND_IO | PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER | PCI_COMMAND_INVALIDATE | PCI_COMMAND_PARITY | PCI_COMMAND_SERR
rc = pci_write_config_word_nodev(ctrl->pci_ops, func->bus, func->device, func->function, PCI_COMMAND, command);
// set Bridge Control Register
command = 0x07; // = PCI_BRIDGE_CTL_PARITY | PCI_BRIDGE_CTL_SERR | PCI_BRIDGE_CTL_NO_ISA
rc = pci_write_config_word_nodev(ctrl->pci_ops, func->bus, func->device, func->function, PCI_BRIDGE_CONTROL, command);
} else if ((temp_byte & 0x7F) == PCI_HEADER_TYPE_NORMAL) {
// Standard device
rc = pci_read_config_byte_nodev (ctrl->pci_ops, func->bus, func->device, func->function, 0x0B, &class_code);
if (class_code == PCI_BASE_CLASS_DISPLAY) {
// Display (video) adapter (not supported)
return(DEVICE_TYPE_NOT_SUPPORTED);
}
// Figure out IO and memory needs
for (cloop = 0x10; cloop <= 0x24; cloop += 4) {
temp_register = 0xFFFFFFFF;
dbg("CND: bus=%d, device=%d, func=%d, offset=%d\n", func->bus, func->device, func->function, cloop);
rc = pci_write_config_dword_nodev(ctrl->pci_ops, func->bus, func->device, func->function, cloop, temp_register);
rc = pci_read_config_dword_nodev (ctrl->pci_ops, func->bus, func->device, func->function, cloop, &temp_register);
dbg("CND: base = 0x%x\n", temp_register);
if (temp_register) { // If this register is implemented
if ((temp_register & 0x03L) == 0x01) {
// Map IO
// set base = amount of IO space
base = temp_register & 0xFFFFFFFC;
base = ~base + 1;
dbg("CND: length = 0x%x\n", base);
io_node = get_io_resource(&(resources->io_head), base);
dbg("Got io_node start = %8.8x, length = %8.8x next (%p)\n",
io_node->base, io_node->length, io_node->next);
dbg("func (%p) io_head (%p)\n", func, func->io_head);
// allocate the resource to the board
if (io_node) {
base = io_node->base;
io_node->next = func->io_head;
func->io_head = io_node;
} else
return -ENOMEM;
} else if ((temp_register & 0x0BL) == 0x08) {
// Map prefetchable memory
base = temp_register & 0xFFFFFFF0;
base = ~base + 1;
dbg("CND: length = 0x%x\n", base);
p_mem_node = get_resource(&(resources->p_mem_head), base);
// allocate the resource to the board
if (p_mem_node) {
base = p_mem_node->base;
p_mem_node->next = func->p_mem_head;
func->p_mem_head = p_mem_node;
} else
return -ENOMEM;
} else if ((temp_register & 0x0BL) == 0x00) {
// Map memory
base = temp_register & 0xFFFFFFF0;
base = ~base + 1;
dbg("CND: length = 0x%x\n", base);
mem_node = get_resource(&(resources->mem_head), base);
// allocate the resource to the board
if (mem_node) {
base = mem_node->base;
mem_node->next = func->mem_head;
func->mem_head = mem_node;
} else
return -ENOMEM;
} else if ((temp_register & 0x0BL) == 0x04) {
// Map memory
base = temp_register & 0xFFFFFFF0;
base = ~base + 1;
dbg("CND: length = 0x%x\n", base);
mem_node = get_resource(&(resources->mem_head), base);
// allocate the resource to the board
if (mem_node) {
base = mem_node->base;
mem_node->next = func->mem_head;
func->mem_head = mem_node;
} else
return -ENOMEM;
} else if ((temp_register & 0x0BL) == 0x06) {
// Those bits are reserved, we can't handle this
return(1);
} else {
// Requesting space below 1M
return(NOT_ENOUGH_RESOURCES);
}
rc = pci_write_config_dword_nodev(ctrl->pci_ops, func->bus, func->device, func->function, cloop, base);
// Check for 64-bit base
if ((temp_register & 0x07L) == 0x04) {
cloop += 4;
// Upper 32 bits of address always zero on today's systems
// FIXME this is probably not true on Alpha and ia64???
base = 0;
rc = pci_write_config_dword_nodev(ctrl->pci_ops, func->bus, func->device, func->function, cloop, base);
}
}
} // End of base register loop
// Figure out which interrupt pin this function uses
rc = pci_read_config_byte_nodev (ctrl->pci_ops, func->bus, func->device, func->function, PCI_INTERRUPT_PIN, &temp_byte);
// If this function needs an interrupt and we are behind a bridge
// and the pin is tied to something that's alread mapped,
// set this one the same
if (temp_byte && resources->irqs &&
(resources->irqs->valid_INT &
(0x01 << ((temp_byte + resources->irqs->barber_pole - 1) & 0x03)))) {
// We have to share with something already set up
IRQ = resources->irqs->interrupt[(temp_byte + resources->irqs->barber_pole - 1) & 0x03];
} else {
// Program IRQ based on card type
rc = pci_read_config_byte_nodev (ctrl->pci_ops, func->bus, func->device, func->function, 0x0B, &class_code);
if (class_code == PCI_BASE_CLASS_STORAGE) {
IRQ = cpqhp_disk_irq;
} else {
IRQ = cpqhp_nic_irq;
}
}
// IRQ Line
rc = pci_write_config_byte_nodev(ctrl->pci_ops, func->bus, func->device, func->function, PCI_INTERRUPT_LINE, IRQ);
if (!behind_bridge) {
rc = cpqhp_set_irq(func->bus, func->device, temp_byte + 0x09, IRQ);
if (rc)
return(1);
} else {
//TBD - this code may also belong in the other clause of this If statement
resources->irqs->interrupt[(temp_byte + resources->irqs->barber_pole - 1) & 0x03] = IRQ;
resources->irqs->valid_INT |= 0x01 << (temp_byte + resources->irqs->barber_pole - 1) & 0x03;
}
// Latency Timer
temp_byte = 0x40;
rc = pci_write_config_byte_nodev(ctrl->pci_ops, func->bus, func->device, func->function, PCI_LATENCY_TIMER, temp_byte);
// Cache Line size
temp_byte = 0x08;
rc = pci_write_config_byte_nodev(ctrl->pci_ops, func->bus, func->device, func->function, PCI_CACHE_LINE_SIZE, temp_byte);
// disable ROM base Address
temp_dword = 0x00L;
rc = pci_write_config_word_nodev(ctrl->pci_ops, func->bus, func->device, func->function, PCI_ROM_ADDRESS, temp_dword);
// enable card
temp_word = 0x0157; // = PCI_COMMAND_IO | PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER | PCI_COMMAND_INVALIDATE | PCI_COMMAND_PARITY | PCI_COMMAND_SERR
rc = pci_write_config_word_nodev(ctrl->pci_ops, func->bus, func->device, func->function, PCI_COMMAND, temp_word);
} // End of Not-A-Bridge else
else {
// It's some strange type of PCI adapter (Cardbus?)
return(DEVICE_TYPE_NOT_SUPPORTED);
}
func->configured = 1;
return 0;
}
|