5bbd4a336c
In today's linux-next I got this compile warning: arch/x86/kernel/apic/es7000_32.c:132: warning: 'base' defined but not used Current patch solves the issue removing the unused variable. Signed-off-by: Javier Martinez Canillas <martinez.javier@gmail.com> Cc: Rakib Mullick <rakib.mullick@gmail.com> Cc: Eric W. Biederman <ebiederm@xmission.com> Cc: Cyrill Gorcunov <gorcunov@openvz.org> Cc: Tejun Heo <tj@kernel.org> LKML-Reference: <1278546719.9020.4.camel@lenovo> Signed-off-by: Ingo Molnar <mingo@elte.hu>
761 lines
18 KiB
C
761 lines
18 KiB
C
/*
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* Written by: Garry Forsgren, Unisys Corporation
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* Natalie Protasevich, Unisys Corporation
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*
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* This file contains the code to configure and interface
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* with Unisys ES7000 series hardware system manager.
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*
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* Copyright (c) 2003 Unisys Corporation.
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* Copyright (C) 2009, Red Hat, Inc., Ingo Molnar
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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 it
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* under the terms of version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it would 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.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write the Free Software Foundation, Inc., 59
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* Temple Place - Suite 330, Boston MA 02111-1307, USA.
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*
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* Contact information: Unisys Corporation, Township Line & Union Meeting
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* Roads-A, Unisys Way, Blue Bell, Pennsylvania, 19424, or:
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*
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* http://www.unisys.com
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/notifier.h>
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#include <linux/spinlock.h>
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#include <linux/cpumask.h>
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#include <linux/threads.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/reboot.h>
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#include <linux/string.h>
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#include <linux/types.h>
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#include <linux/errno.h>
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#include <linux/acpi.h>
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#include <linux/init.h>
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#include <linux/gfp.h>
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#include <linux/nmi.h>
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#include <linux/smp.h>
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#include <linux/io.h>
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#include <asm/apicdef.h>
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#include <asm/atomic.h>
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#include <asm/fixmap.h>
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#include <asm/mpspec.h>
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#include <asm/setup.h>
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#include <asm/apic.h>
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#include <asm/ipi.h>
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/*
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* ES7000 chipsets
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*/
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#define NON_UNISYS 0
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#define ES7000_CLASSIC 1
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#define ES7000_ZORRO 2
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#define MIP_REG 1
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#define MIP_PSAI_REG 4
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#define MIP_BUSY 1
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#define MIP_SPIN 0xf0000
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#define MIP_VALID 0x0100000000000000ULL
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#define MIP_SW_APIC 0x1020b
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#define MIP_PORT(val) ((val >> 32) & 0xffff)
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#define MIP_RD_LO(val) (val & 0xffffffff)
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struct mip_reg {
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unsigned long long off_0x00;
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unsigned long long off_0x08;
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unsigned long long off_0x10;
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unsigned long long off_0x18;
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unsigned long long off_0x20;
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unsigned long long off_0x28;
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unsigned long long off_0x30;
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unsigned long long off_0x38;
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};
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struct mip_reg_info {
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unsigned long long mip_info;
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unsigned long long delivery_info;
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unsigned long long host_reg;
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unsigned long long mip_reg;
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};
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struct psai {
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unsigned long long entry_type;
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unsigned long long addr;
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unsigned long long bep_addr;
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};
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#ifdef CONFIG_ACPI
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struct es7000_oem_table {
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struct acpi_table_header Header;
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u32 OEMTableAddr;
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u32 OEMTableSize;
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};
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static unsigned long oem_addrX;
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static unsigned long oem_size;
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#endif
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/*
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* ES7000 Globals
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*/
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static volatile unsigned long *psai;
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static struct mip_reg *mip_reg;
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static struct mip_reg *host_reg;
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static int mip_port;
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static unsigned long mip_addr;
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static unsigned long host_addr;
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int es7000_plat;
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/*
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* GSI override for ES7000 platforms.
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*/
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static int __cpuinit wakeup_secondary_cpu_via_mip(int cpu, unsigned long eip)
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{
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unsigned long vect = 0, psaival = 0;
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if (psai == NULL)
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return -1;
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vect = ((unsigned long)__pa(eip)/0x1000) << 16;
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psaival = (0x1000000 | vect | cpu);
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while (*psai & 0x1000000)
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;
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*psai = psaival;
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return 0;
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}
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static int es7000_apic_is_cluster(void)
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{
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/* MPENTIUMIII */
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if (boot_cpu_data.x86 == 6 &&
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(boot_cpu_data.x86_model >= 7 && boot_cpu_data.x86_model <= 11))
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return 1;
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return 0;
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}
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static void setup_unisys(void)
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{
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/*
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* Determine the generation of the ES7000 currently running.
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*
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* es7000_plat = 1 if the machine is a 5xx ES7000 box
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* es7000_plat = 2 if the machine is a x86_64 ES7000 box
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*
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*/
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if (!(boot_cpu_data.x86 <= 15 && boot_cpu_data.x86_model <= 2))
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es7000_plat = ES7000_ZORRO;
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else
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es7000_plat = ES7000_CLASSIC;
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}
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/*
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* Parse the OEM Table:
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*/
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static int parse_unisys_oem(char *oemptr)
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{
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int i;
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int success = 0;
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unsigned char type, size;
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unsigned long val;
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char *tp = NULL;
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struct psai *psaip = NULL;
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struct mip_reg_info *mi;
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struct mip_reg *host, *mip;
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tp = oemptr;
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tp += 8;
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for (i = 0; i <= 6; i++) {
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type = *tp++;
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size = *tp++;
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tp -= 2;
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switch (type) {
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case MIP_REG:
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mi = (struct mip_reg_info *)tp;
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val = MIP_RD_LO(mi->host_reg);
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host_addr = val;
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host = (struct mip_reg *)val;
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host_reg = __va(host);
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val = MIP_RD_LO(mi->mip_reg);
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mip_port = MIP_PORT(mi->mip_info);
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mip_addr = val;
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mip = (struct mip_reg *)val;
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mip_reg = __va(mip);
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pr_debug("host_reg = 0x%lx\n",
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(unsigned long)host_reg);
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pr_debug("mip_reg = 0x%lx\n",
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(unsigned long)mip_reg);
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success++;
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break;
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case MIP_PSAI_REG:
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psaip = (struct psai *)tp;
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if (tp != NULL) {
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if (psaip->addr)
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psai = __va(psaip->addr);
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else
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psai = NULL;
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success++;
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}
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break;
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default:
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break;
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}
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tp += size;
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}
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if (success < 2)
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es7000_plat = NON_UNISYS;
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else
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setup_unisys();
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return es7000_plat;
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}
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#ifdef CONFIG_ACPI
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static int __init find_unisys_acpi_oem_table(unsigned long *oem_addr)
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{
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struct acpi_table_header *header = NULL;
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struct es7000_oem_table *table;
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acpi_size tbl_size;
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acpi_status ret;
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int i = 0;
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for (;;) {
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ret = acpi_get_table_with_size("OEM1", i++, &header, &tbl_size);
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if (!ACPI_SUCCESS(ret))
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return -1;
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if (!memcmp((char *) &header->oem_id, "UNISYS", 6))
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break;
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early_acpi_os_unmap_memory(header, tbl_size);
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}
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table = (void *)header;
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oem_addrX = table->OEMTableAddr;
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oem_size = table->OEMTableSize;
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early_acpi_os_unmap_memory(header, tbl_size);
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*oem_addr = (unsigned long)__acpi_map_table(oem_addrX, oem_size);
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return 0;
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}
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static void __init unmap_unisys_acpi_oem_table(unsigned long oem_addr)
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{
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if (!oem_addr)
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return;
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__acpi_unmap_table((char *)oem_addr, oem_size);
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}
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static int es7000_check_dsdt(void)
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{
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struct acpi_table_header header;
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if (ACPI_SUCCESS(acpi_get_table_header(ACPI_SIG_DSDT, 0, &header)) &&
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!strncmp(header.oem_id, "UNISYS", 6))
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return 1;
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return 0;
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}
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static int es7000_acpi_ret;
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/* Hook from generic ACPI tables.c */
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static int __init es7000_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
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{
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unsigned long oem_addr = 0;
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int check_dsdt;
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int ret = 0;
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/* check dsdt at first to avoid clear fix_map for oem_addr */
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check_dsdt = es7000_check_dsdt();
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if (!find_unisys_acpi_oem_table(&oem_addr)) {
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if (check_dsdt) {
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ret = parse_unisys_oem((char *)oem_addr);
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} else {
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setup_unisys();
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ret = 1;
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}
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/*
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* we need to unmap it
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*/
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unmap_unisys_acpi_oem_table(oem_addr);
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}
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es7000_acpi_ret = ret;
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return ret && !es7000_apic_is_cluster();
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}
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static int es7000_acpi_madt_oem_check_cluster(char *oem_id, char *oem_table_id)
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{
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int ret = es7000_acpi_ret;
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return ret && es7000_apic_is_cluster();
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}
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#else /* !CONFIG_ACPI: */
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static int es7000_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
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{
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return 0;
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}
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static int es7000_acpi_madt_oem_check_cluster(char *oem_id, char *oem_table_id)
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{
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return 0;
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}
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#endif /* !CONFIG_ACPI */
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static void es7000_spin(int n)
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{
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int i = 0;
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while (i++ < n)
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rep_nop();
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}
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static int es7000_mip_write(struct mip_reg *mip_reg)
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{
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int status = 0;
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int spin;
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spin = MIP_SPIN;
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while ((host_reg->off_0x38 & MIP_VALID) != 0) {
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if (--spin <= 0) {
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WARN(1, "Timeout waiting for Host Valid Flag\n");
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return -1;
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}
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es7000_spin(MIP_SPIN);
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}
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memcpy(host_reg, mip_reg, sizeof(struct mip_reg));
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outb(1, mip_port);
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spin = MIP_SPIN;
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while ((mip_reg->off_0x38 & MIP_VALID) == 0) {
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if (--spin <= 0) {
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WARN(1, "Timeout waiting for MIP Valid Flag\n");
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return -1;
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}
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es7000_spin(MIP_SPIN);
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}
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status = (mip_reg->off_0x00 & 0xffff0000000000ULL) >> 48;
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mip_reg->off_0x38 &= ~MIP_VALID;
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return status;
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}
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static void es7000_enable_apic_mode(void)
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{
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struct mip_reg es7000_mip_reg;
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int mip_status;
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if (!es7000_plat)
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return;
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pr_info("Enabling APIC mode.\n");
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memset(&es7000_mip_reg, 0, sizeof(struct mip_reg));
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es7000_mip_reg.off_0x00 = MIP_SW_APIC;
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es7000_mip_reg.off_0x38 = MIP_VALID;
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while ((mip_status = es7000_mip_write(&es7000_mip_reg)) != 0)
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WARN(1, "Command failed, status = %x\n", mip_status);
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}
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static void es7000_vector_allocation_domain(int cpu, struct cpumask *retmask)
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{
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/* Careful. Some cpus do not strictly honor the set of cpus
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* specified in the interrupt destination when using lowest
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* priority interrupt delivery mode.
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*
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* In particular there was a hyperthreading cpu observed to
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* deliver interrupts to the wrong hyperthread when only one
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* hyperthread was specified in the interrupt desitination.
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*/
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cpumask_clear(retmask);
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cpumask_bits(retmask)[0] = APIC_ALL_CPUS;
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}
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static void es7000_wait_for_init_deassert(atomic_t *deassert)
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{
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while (!atomic_read(deassert))
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cpu_relax();
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}
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static unsigned int es7000_get_apic_id(unsigned long x)
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{
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return (x >> 24) & 0xFF;
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}
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static void es7000_send_IPI_mask(const struct cpumask *mask, int vector)
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{
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default_send_IPI_mask_sequence_phys(mask, vector);
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}
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static void es7000_send_IPI_allbutself(int vector)
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{
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default_send_IPI_mask_allbutself_phys(cpu_online_mask, vector);
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}
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static void es7000_send_IPI_all(int vector)
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{
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es7000_send_IPI_mask(cpu_online_mask, vector);
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}
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static int es7000_apic_id_registered(void)
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{
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return 1;
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}
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static const struct cpumask *target_cpus_cluster(void)
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{
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return cpu_all_mask;
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}
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static const struct cpumask *es7000_target_cpus(void)
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{
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return cpumask_of(smp_processor_id());
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}
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static unsigned long es7000_check_apicid_used(physid_mask_t *map, int apicid)
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{
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return 0;
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}
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static unsigned long es7000_check_apicid_present(int bit)
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{
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return physid_isset(bit, phys_cpu_present_map);
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}
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static unsigned long calculate_ldr(int cpu)
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{
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unsigned long id = per_cpu(x86_bios_cpu_apicid, cpu);
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return SET_APIC_LOGICAL_ID(id);
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}
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/*
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* Set up the logical destination ID.
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*
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* Intel recommends to set DFR, LdR and TPR before enabling
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* an APIC. See e.g. "AP-388 82489DX User's Manual" (Intel
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* document number 292116). So here it goes...
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*/
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static void es7000_init_apic_ldr_cluster(void)
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{
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unsigned long val;
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int cpu = smp_processor_id();
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apic_write(APIC_DFR, APIC_DFR_CLUSTER);
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val = calculate_ldr(cpu);
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apic_write(APIC_LDR, val);
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}
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static void es7000_init_apic_ldr(void)
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{
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unsigned long val;
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int cpu = smp_processor_id();
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apic_write(APIC_DFR, APIC_DFR_FLAT);
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val = calculate_ldr(cpu);
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apic_write(APIC_LDR, val);
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}
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static void es7000_setup_apic_routing(void)
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{
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int apic = per_cpu(x86_bios_cpu_apicid, smp_processor_id());
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pr_info("Enabling APIC mode: %s. Using %d I/O APICs, target cpus %lx\n",
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(apic_version[apic] == 0x14) ?
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"Physical Cluster" : "Logical Cluster",
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nr_ioapics, cpumask_bits(es7000_target_cpus())[0]);
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}
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static int es7000_apicid_to_node(int logical_apicid)
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{
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return 0;
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}
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static int es7000_cpu_present_to_apicid(int mps_cpu)
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{
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if (!mps_cpu)
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return boot_cpu_physical_apicid;
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else if (mps_cpu < nr_cpu_ids)
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return per_cpu(x86_bios_cpu_apicid, mps_cpu);
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else
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return BAD_APICID;
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}
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static int cpu_id;
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static void es7000_apicid_to_cpu_present(int phys_apicid, physid_mask_t *retmap)
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{
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physid_set_mask_of_physid(cpu_id, retmap);
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++cpu_id;
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}
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/* Mapping from cpu number to logical apicid */
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static int es7000_cpu_to_logical_apicid(int cpu)
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{
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#ifdef CONFIG_SMP
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if (cpu >= nr_cpu_ids)
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return BAD_APICID;
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return cpu_2_logical_apicid[cpu];
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#else
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return logical_smp_processor_id();
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#endif
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}
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static void es7000_ioapic_phys_id_map(physid_mask_t *phys_map, physid_mask_t *retmap)
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{
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/* For clustered we don't have a good way to do this yet - hack */
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physids_promote(0xFFL, retmap);
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}
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static int es7000_check_phys_apicid_present(int cpu_physical_apicid)
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{
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boot_cpu_physical_apicid = read_apic_id();
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return 1;
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}
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static unsigned int es7000_cpu_mask_to_apicid(const struct cpumask *cpumask)
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{
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unsigned int round = 0;
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int cpu, uninitialized_var(apicid);
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/*
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* The cpus in the mask must all be on the apic cluster.
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*/
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for_each_cpu(cpu, cpumask) {
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int new_apicid = es7000_cpu_to_logical_apicid(cpu);
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if (round && APIC_CLUSTER(apicid) != APIC_CLUSTER(new_apicid)) {
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WARN(1, "Not a valid mask!");
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return BAD_APICID;
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}
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apicid = new_apicid;
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round++;
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}
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return apicid;
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}
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static unsigned int
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es7000_cpu_mask_to_apicid_and(const struct cpumask *inmask,
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const struct cpumask *andmask)
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{
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int apicid = es7000_cpu_to_logical_apicid(0);
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cpumask_var_t cpumask;
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if (!alloc_cpumask_var(&cpumask, GFP_ATOMIC))
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return apicid;
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cpumask_and(cpumask, inmask, andmask);
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cpumask_and(cpumask, cpumask, cpu_online_mask);
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apicid = es7000_cpu_mask_to_apicid(cpumask);
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free_cpumask_var(cpumask);
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return apicid;
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}
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static int es7000_phys_pkg_id(int cpuid_apic, int index_msb)
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{
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return cpuid_apic >> index_msb;
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}
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static int probe_es7000(void)
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{
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/* probed later in mptable/ACPI hooks */
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return 0;
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}
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static int es7000_mps_ret;
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static int es7000_mps_oem_check(struct mpc_table *mpc, char *oem,
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char *productid)
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{
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int ret = 0;
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if (mpc->oemptr) {
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struct mpc_oemtable *oem_table =
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(struct mpc_oemtable *)mpc->oemptr;
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if (!strncmp(oem, "UNISYS", 6))
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ret = parse_unisys_oem((char *)oem_table);
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}
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es7000_mps_ret = ret;
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return ret && !es7000_apic_is_cluster();
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}
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static int es7000_mps_oem_check_cluster(struct mpc_table *mpc, char *oem,
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char *productid)
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{
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int ret = es7000_mps_ret;
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|
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return ret && es7000_apic_is_cluster();
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}
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/* We've been warned by a false positive warning.Use __refdata to keep calm. */
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struct apic __refdata apic_es7000_cluster = {
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.name = "es7000",
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.probe = probe_es7000,
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.acpi_madt_oem_check = es7000_acpi_madt_oem_check_cluster,
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.apic_id_registered = es7000_apic_id_registered,
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|
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.irq_delivery_mode = dest_LowestPrio,
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/* logical delivery broadcast to all procs: */
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.irq_dest_mode = 1,
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.target_cpus = target_cpus_cluster,
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.disable_esr = 1,
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.dest_logical = 0,
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.check_apicid_used = es7000_check_apicid_used,
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.check_apicid_present = es7000_check_apicid_present,
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|
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.vector_allocation_domain = es7000_vector_allocation_domain,
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.init_apic_ldr = es7000_init_apic_ldr_cluster,
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|
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.ioapic_phys_id_map = es7000_ioapic_phys_id_map,
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.setup_apic_routing = es7000_setup_apic_routing,
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.multi_timer_check = NULL,
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.apicid_to_node = es7000_apicid_to_node,
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.cpu_to_logical_apicid = es7000_cpu_to_logical_apicid,
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.cpu_present_to_apicid = es7000_cpu_present_to_apicid,
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.apicid_to_cpu_present = es7000_apicid_to_cpu_present,
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.setup_portio_remap = NULL,
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|
.check_phys_apicid_present = es7000_check_phys_apicid_present,
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.enable_apic_mode = es7000_enable_apic_mode,
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.phys_pkg_id = es7000_phys_pkg_id,
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.mps_oem_check = es7000_mps_oem_check_cluster,
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|
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.get_apic_id = es7000_get_apic_id,
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.set_apic_id = NULL,
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.apic_id_mask = 0xFF << 24,
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|
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.cpu_mask_to_apicid = es7000_cpu_mask_to_apicid,
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.cpu_mask_to_apicid_and = es7000_cpu_mask_to_apicid_and,
|
|
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.send_IPI_mask = es7000_send_IPI_mask,
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|
.send_IPI_mask_allbutself = NULL,
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.send_IPI_allbutself = es7000_send_IPI_allbutself,
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.send_IPI_all = es7000_send_IPI_all,
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.send_IPI_self = default_send_IPI_self,
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|
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.wakeup_secondary_cpu = wakeup_secondary_cpu_via_mip,
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|
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|
.trampoline_phys_low = 0x467,
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|
.trampoline_phys_high = 0x469,
|
|
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|
.wait_for_init_deassert = NULL,
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|
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|
/* Nothing to do for most platforms, since cleared by the INIT cycle: */
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|
.smp_callin_clear_local_apic = NULL,
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|
.inquire_remote_apic = default_inquire_remote_apic,
|
|
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|
.read = native_apic_mem_read,
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|
.write = native_apic_mem_write,
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|
.icr_read = native_apic_icr_read,
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|
.icr_write = native_apic_icr_write,
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|
.wait_icr_idle = native_apic_wait_icr_idle,
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|
.safe_wait_icr_idle = native_safe_apic_wait_icr_idle,
|
|
};
|
|
|
|
struct apic __refdata apic_es7000 = {
|
|
|
|
.name = "es7000",
|
|
.probe = probe_es7000,
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|
.acpi_madt_oem_check = es7000_acpi_madt_oem_check,
|
|
.apic_id_registered = es7000_apic_id_registered,
|
|
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|
.irq_delivery_mode = dest_Fixed,
|
|
/* phys delivery to target CPUs: */
|
|
.irq_dest_mode = 0,
|
|
|
|
.target_cpus = es7000_target_cpus,
|
|
.disable_esr = 1,
|
|
.dest_logical = 0,
|
|
.check_apicid_used = es7000_check_apicid_used,
|
|
.check_apicid_present = es7000_check_apicid_present,
|
|
|
|
.vector_allocation_domain = es7000_vector_allocation_domain,
|
|
.init_apic_ldr = es7000_init_apic_ldr,
|
|
|
|
.ioapic_phys_id_map = es7000_ioapic_phys_id_map,
|
|
.setup_apic_routing = es7000_setup_apic_routing,
|
|
.multi_timer_check = NULL,
|
|
.apicid_to_node = es7000_apicid_to_node,
|
|
.cpu_to_logical_apicid = es7000_cpu_to_logical_apicid,
|
|
.cpu_present_to_apicid = es7000_cpu_present_to_apicid,
|
|
.apicid_to_cpu_present = es7000_apicid_to_cpu_present,
|
|
.setup_portio_remap = NULL,
|
|
.check_phys_apicid_present = es7000_check_phys_apicid_present,
|
|
.enable_apic_mode = es7000_enable_apic_mode,
|
|
.phys_pkg_id = es7000_phys_pkg_id,
|
|
.mps_oem_check = es7000_mps_oem_check,
|
|
|
|
.get_apic_id = es7000_get_apic_id,
|
|
.set_apic_id = NULL,
|
|
.apic_id_mask = 0xFF << 24,
|
|
|
|
.cpu_mask_to_apicid = es7000_cpu_mask_to_apicid,
|
|
.cpu_mask_to_apicid_and = es7000_cpu_mask_to_apicid_and,
|
|
|
|
.send_IPI_mask = es7000_send_IPI_mask,
|
|
.send_IPI_mask_allbutself = NULL,
|
|
.send_IPI_allbutself = es7000_send_IPI_allbutself,
|
|
.send_IPI_all = es7000_send_IPI_all,
|
|
.send_IPI_self = default_send_IPI_self,
|
|
|
|
.trampoline_phys_low = 0x467,
|
|
.trampoline_phys_high = 0x469,
|
|
|
|
.wait_for_init_deassert = es7000_wait_for_init_deassert,
|
|
|
|
/* Nothing to do for most platforms, since cleared by the INIT cycle: */
|
|
.smp_callin_clear_local_apic = NULL,
|
|
.inquire_remote_apic = default_inquire_remote_apic,
|
|
|
|
.read = native_apic_mem_read,
|
|
.write = native_apic_mem_write,
|
|
.icr_read = native_apic_icr_read,
|
|
.icr_write = native_apic_icr_write,
|
|
.wait_icr_idle = native_apic_wait_icr_idle,
|
|
.safe_wait_icr_idle = native_safe_apic_wait_icr_idle,
|
|
};
|