/*
* SHPCHPRM NONACPI: PHP Resource Manager for Non-ACPI/Legacy platform
*
* Copyright (C) 1995,2001 Compaq Computer Corporation
* Copyright (C) 2001 Greg Kroah-Hartman (greg@kroah.com)
* Copyright (C) 2001 IBM Corp.
* Copyright (C) 2003-2004 Intel Corporation
*
* All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or (at
* your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
* NON INFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* Send feedback to <greg@kroah.com>, <kristen.c.accardi@intel.com>
*
*/
#include <linux/config.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/pci.h>
#include <linux/init.h>
#include <asm/uaccess.h>
#ifdef CONFIG_IA64
#include <asm/iosapic.h>
#endif
#include "shpchp.h"
#include "shpchprm.h"
#include "shpchprm_nonacpi.h"
void shpchprm_cleanup(void)
{
return;
}
int shpchprm_print_pirt(void)
{
return 0;
}
int shpchprm_get_physical_slot_number(struct controller *ctrl, u32 *sun, u8 busnum, u8 devnum)
{
int offset = devnum - ctrl->slot_device_offset;
dbg("%s: ctrl->slot_num_inc %d, offset %d\n", __FUNCTION__, ctrl->slot_num_inc, offset);
*sun = (u8) (ctrl->first_slot + ctrl->slot_num_inc * offset);
return 0;
}
static void print_pci_resource ( struct pci_resource *aprh)
{
struct pci_resource *res;
for (res = aprh; res; res = res->next)
dbg(" base= 0x%x length= 0x%x\n", res->base, res->length);
}
static void phprm_dump_func_res( struct pci_func *fun)
{
struct pci_func *func = fun;
if (func->bus_head) {
dbg(": BUS Resources:\n");
print_pci_resource (func->bus_head);
}
if (func->io_head) {
dbg(": IO Resources:\n");
print_pci_resource (func->io_head);
}
if (func->mem_head) {
dbg(": MEM Resources:\n");
print_pci_resource (func->mem_head);
}
if (func->p_mem_head) {
dbg(": PMEM Resources:\n");
print_pci_resource (func->p_mem_head);
}
}
static int phprm_get_used_resources (
struct controller *ctrl,
struct pci_func *func
)
{
return shpchp_save_used_resources (ctrl, func, !DISABLE_CARD);
}
static int phprm_delete_resource(
struct pci_resource **aprh,
ulong base,
ulong size)
{
struct pci_resource *res;
struct pci_resource *prevnode;
struct pci_resource *split_node;
ulong tbase;
shpchp_resource_sort_and_combine(aprh);
for (res = *aprh; res; res = res->next) {
if (res->base > base)
continue;
if ((res->base + res->length) < (base + size))
continue;
if (res->base < base) {
tbase = base;
if ((res->length - (tbase - res->base)) < size)
continue;
split_node = (struct pci_resource *) kmalloc(sizeof(struct pci_resource), GFP_KERNEL);
if (!split_node)
return -ENOMEM;
split_node->base = res->base;
split_node->length = tbase - res->base;
res->base = tbase;
res->length -= split_node->length;
split_node->next = res->next;
res->next = split_node;
}
if (res->length >= size) {
split_node = (struct pci_resource*) kmalloc(sizeof(struct pci_resource), GFP_KERNEL);
if (!split_node)
return -ENOMEM;
split_node->base = res->base + size;
split_node->length = res->length - size;
res->length = size;
split_node->next = res->next;
res->next = split_node;
}
if (*aprh == res) {
*aprh = res->next;
} else {
prevnode = *aprh;
while (prevnode->next != res)
prevnode = prevnode->next;
prevnode->next = res->next;
}
res->next = NULL;
kfree(res);
break;
}
return 0;
}
static int phprm_delete_resources(
struct pci_resource **aprh,
struct pci_resource *this
)
{
struct pci_resource *res;
for (res = this; res; res = res->next)
phprm_delete_resource(aprh, res->base, res->length);
return 0;
}
static int configure_existing_function(
struct controller *ctrl,
struct pci_func *func
)
{
int rc;
/* see how much resources the func has used. */
rc = phprm_get_used_resources (ctrl, func);
if (!rc) {
/* subtract the resources used by the func from ctrl resources */
rc = phprm_delete_resources (&ctrl->bus_head, func->bus_head);
rc |= phprm_delete_resources (&ctrl->io_head, func->io_head);
rc |= phprm_delete_resources (&ctrl->mem_head, func->mem_head);
rc |= phprm_delete_resources (&ctrl->p_mem_head, func->p_mem_head);
if (rc)
warn("aCEF: cannot del used resources\n");
} else
err("aCEF: cannot get used resources\n");
return rc;
}
static int bind_pci_resources_to_slots ( struct controller *ctrl)
{
struct pci_func *func, new_func;
int busn = ctrl->slot_bus;
int devn, funn;
u32 vid;
for (devn = 0; devn < 32; devn++) {
for (funn = 0; funn < 8; funn++) {
/*
if (devn == ctrl->device && funn == ctrl->function)
continue;
*/
/* find out if this entry is for an occupied slot */
vid = 0xFFFFFFFF;
pci_bus_read_config_dword(ctrl->pci_dev->subordinate, PCI_DEVFN(devn, funn), PCI_VENDOR_ID, &vid);
if (vid != 0xFFFFFFFF) {
func = shpchp_slot_find(busn, devn, funn);
if (!func) {
memset(&new_func, 0, sizeof(struct pci_func));
new_func.bus = busn;
new_func.device = devn;
new_func.function = funn;
new_func.is_a_board = 1;
configure_existing_function(ctrl, &new_func);
phprm_dump_func_res(&new_func);
} else {
configure_existing_function(ctrl, func);
phprm_dump_func_res(func);
}
dbg("aCCF:existing PCI 0x%x Func ResourceDump\n", ctrl->bus);
}
}
}
return 0;
}
static void phprm_dump_ctrl_res( struct controller *ctlr)
{
struct controller *ctrl = ctlr;
if (ctrl->bus_head) {
dbg(": BUS Resources:\n");
print_pci_resource (ctrl->bus_head);
}
if (ctrl->io_head) {
dbg(": IO Resources:\n");
print_pci_resource (ctrl->io_head);
}
if (ctrl->mem_head) {
dbg(": MEM Resources:\n");
print_pci_resource (ctrl->mem_head);
}
if (ctrl->p_mem_head) {
dbg(": PMEM Resources:\n");
print_pci_resource (ctrl->p_mem_head);
}
}
/*
* phprm_find_available_resources
*
* Finds available memory, IO, and IRQ resources for programming
* devices which may be added to the system
* this function is for hot plug ADD!
*
* returns 0 if success
*/
int shpchprm_find_available_resources(struct controller *ctrl)
{
struct pci_func func;
u32 rc;
memset(&func, 0, sizeof(struct pci_func));
func.bus = ctrl->bus;
func.device = ctrl->device;
func.function = ctrl->function;
func.is_a_board = 1;
/* Get resources for this PCI bridge */
rc = shpchp_save_used_resources (ctrl, &func, !DISABLE_CARD);
dbg("%s: shpchp_save_used_resources rc = %d\n", __FUNCTION__, rc);
if (func.mem_head)
func.mem_head->next = ctrl->mem_head;
ctrl->mem_head = func.mem_head;
if (func.p_mem_head)
func.p_mem_head->next = ctrl->p_mem_head;
ctrl->p_mem_head = func.p_mem_head;
if (func.io_head)
func.io_head->next = ctrl->io_head;
ctrl->io_head = func.io_head;
if(func.bus_head)
func.bus_head->next = ctrl->bus_head;
ctrl->bus_head = func.bus_head;
if (ctrl->bus_head)
phprm_delete_resource(&ctrl->bus_head, ctrl->pci_dev->subordinate->number, 1);
dbg("%s:pre-Bind PCI 0x%x Ctrl Resource Dump\n", __FUNCTION__, ctrl->bus);
phprm_dump_ctrl_res(ctrl);
bind_pci_resources_to_slots (ctrl);
dbg("%s:post-Bind PCI 0x%x Ctrl Resource Dump\n", __FUNCTION__, ctrl->bus);
phprm_dump_ctrl_res(ctrl);
/* If all of the following fail, we don't have any resources for hot plug add */
rc = 1;
rc &= shpchp_resource_sort_and_combine(&(ctrl->mem_head));
rc &= shpchp_resource_sort_and_combine(&(ctrl->p_mem_head));
rc &= shpchp_resource_sort_and_combine(&(ctrl->io_head));
rc &= shpchp_resource_sort_and_combine(&(ctrl->bus_head));
return (rc);
}
int shpchprm_set_hpp(
struct controller *ctrl,
struct pci_func *func,
u8 card_type)
{
u32 rc;
u8 temp_byte;
struct pci_bus lpci_bus, *pci_bus;
unsigned int devfn;
memcpy(&lpci_bus, ctrl->pci_bus, sizeof(lpci_bus));
pci_bus = &lpci_bus;
pci_bus->number = func->bus;
devfn = PCI_DEVFN(func->device, func->function);
temp_byte = 0x40; /* hard coded value for LT */
if (card_type == PCI_HEADER_TYPE_BRIDGE) {
/* set subordinate Latency Timer */
rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_SEC_LATENCY_TIMER, temp_byte);
if (rc) {
dbg("%s: set secondary LT error. b:d:f(%02x:%02x:%02x)\n", __FUNCTION__, func->bus,
func->device, func->function);
return rc;
}
}
/* set base Latency Timer */
rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_LATENCY_TIMER, temp_byte);
if (rc) {
dbg("%s: set LT error. b:d:f(%02x:%02x:%02x)\n", __FUNCTION__, func->bus, func->device, func->function);
return rc;
}
/* set Cache Line size */
temp_byte = 0x08; /* hard coded value for CLS */
rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_CACHE_LINE_SIZE, temp_byte);
if (rc) {
dbg("%s: set CLS error. b:d:f(%02x:%02x:%02x)\n", __FUNCTION__, func->bus, func->device, func->function);
}
/* set enable_perr */
/* set enable_serr */
return rc;
}
void shpchprm_enable_card(
struct controller *ctrl,
struct pci_func *func,
u8 card_type)
{
u16 command, bcommand;
struct pci_bus lpci_bus, *pci_bus;
unsigned int devfn;
int rc;
memcpy(&lpci_bus, ctrl->pci_bus, sizeof(lpci_bus));
pci_bus = &lpci_bus;
pci_bus->number = func->bus;
devfn = PCI_DEVFN(func->device, func->function);
rc = pci_bus_read_config_word(pci_bus, devfn, PCI_COMMAND, &command);
command |= PCI_COMMAND_PARITY | PCI_COMMAND_SERR
| PCI_COMMAND_MASTER | PCI_COMMAND_INVALIDATE
| PCI_COMMAND_IO | PCI_COMMAND_MEMORY;
rc = pci_bus_write_config_word(pci_bus, devfn, PCI_COMMAND, command);
if (card_type == PCI_HEADER_TYPE_BRIDGE) {
rc = pci_bus_read_config_word(pci_bus, devfn, PCI_BRIDGE_CONTROL, &bcommand);
bcommand |= PCI_BRIDGE_CTL_PARITY | PCI_BRIDGE_CTL_SERR
| PCI_BRIDGE_CTL_NO_ISA;
rc = pci_bus_write_config_word(pci_bus, devfn, PCI_BRIDGE_CONTROL, bcommand);
}
}
static int legacy_shpchprm_init_pci(void)
{
return 0;
}
int shpchprm_init(enum php_ctlr_type ctrl_type)
{
int retval;
switch (ctrl_type) {
case PCI:
retval = legacy_shpchprm_init_pci();
break;
default:
retval = -ENODEV;
break;
}
return retval;
}
