![Linus Torvalds](/assets/img/avatar_default.png)
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
502 lines
12 KiB
C
502 lines
12 KiB
C
/*
|
|
* PCIEHPRM 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>, <dely.l.sy@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 "pciehp.h"
|
|
#include "pciehprm.h"
|
|
#include "pciehprm_nonacpi.h"
|
|
|
|
|
|
void pciehprm_cleanup(void)
|
|
{
|
|
return;
|
|
}
|
|
|
|
int pciehprm_print_pirt(void)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
int pciehprm_get_physical_slot_number(struct controller *ctrl, u32 *sun, u8 busnum, u8 devnum)
|
|
{
|
|
|
|
*sun = (u8) (ctrl->first_slot);
|
|
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 pciehp_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;
|
|
|
|
pciehp_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 pciehprm_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;
|
|
|
|
pciehp_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 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) {
|
|
dbg("%s: vid = %x bus %x dev %x fun %x\n", __FUNCTION__,
|
|
vid, busn, devn, funn);
|
|
func = pciehp_slot_find(busn, devn, funn);
|
|
dbg("%s: func = %p\n", __FUNCTION__,func);
|
|
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 pciehprm_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 = pciehp_save_used_resources (ctrl, &func, !DISABLE_CARD);
|
|
dbg("%s: pciehp_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)
|
|
pciehprm_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);
|
|
|
|
dbg("%s: before bind_pci_resources_to slots\n", __FUNCTION__);
|
|
|
|
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);
|
|
|
|
return (rc);
|
|
}
|
|
|
|
int pciehprm_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 pciehprm_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_pciehprm_init_pci(void)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
int pciehprm_init(enum php_ctlr_type ctrl_type)
|
|
{
|
|
int retval;
|
|
|
|
switch (ctrl_type) {
|
|
case PCI:
|
|
retval = legacy_pciehprm_init_pci();
|
|
break;
|
|
default:
|
|
retval = -ENODEV;
|
|
break;
|
|
}
|
|
|
|
return retval;
|
|
}
|