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