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1b5d3e00d4
Enhance SFI to provide basic support of irqdomain with identity mapping between GSIs and IRQs. Some Intel MID platforms assumes identity mapping between GSI and IRQ, so we can't dynamically allocate IRQ number on demand. Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com> Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Cc: Tony Luck <tony.luck@intel.com> Cc: Joerg Roedel <joro@8bytes.org> Cc: Paul Gortmaker <paul.gortmaker@windriver.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: H. Peter Anvin <hpa@linux.intel.com> Cc: sfi-devel@simplefirmware.org Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Grant Likely <grant.likely@linaro.org> Cc: Rafael J. Wysocki <rjw@rjwysocki.net> Cc: Bjorn Helgaas <bhelgaas@google.com> Cc: Randy Dunlap <rdunlap@infradead.org> Cc: Yinghai Lu <yinghai@kernel.org> Cc: Len Brown <lenb@kernel.org> Cc: David Cohen <david.a.cohen@linux.intel.com> Cc: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com> Link: http://lkml.kernel.org/r/1402302011-23642-28-git-send-email-jiang.liu@linux.intel.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
116 lines
3.0 KiB
C
116 lines
3.0 KiB
C
/*
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* sfi.c - x86 architecture SFI support.
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*
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* Copyright (c) 2009, Intel Corporation.
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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 and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
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*
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*/
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#define KMSG_COMPONENT "SFI"
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#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
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#include <linux/acpi.h>
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#include <linux/init.h>
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#include <linux/sfi.h>
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#include <linux/io.h>
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#include <linux/irqdomain.h>
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#include <asm/io_apic.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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#ifdef CONFIG_X86_LOCAL_APIC
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static unsigned long sfi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
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/* All CPUs enumerated by SFI must be present and enabled */
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static void __init mp_sfi_register_lapic(u8 id)
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{
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if (MAX_LOCAL_APIC - id <= 0) {
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pr_warning("Processor #%d invalid (max %d)\n",
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id, MAX_LOCAL_APIC);
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return;
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}
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pr_info("registering lapic[%d]\n", id);
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generic_processor_info(id, GET_APIC_VERSION(apic_read(APIC_LVR)));
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}
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static int __init sfi_parse_cpus(struct sfi_table_header *table)
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{
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struct sfi_table_simple *sb;
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struct sfi_cpu_table_entry *pentry;
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int i;
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int cpu_num;
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sb = (struct sfi_table_simple *)table;
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cpu_num = SFI_GET_NUM_ENTRIES(sb, struct sfi_cpu_table_entry);
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pentry = (struct sfi_cpu_table_entry *)sb->pentry;
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for (i = 0; i < cpu_num; i++) {
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mp_sfi_register_lapic(pentry->apic_id);
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pentry++;
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}
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smp_found_config = 1;
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return 0;
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}
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#endif /* CONFIG_X86_LOCAL_APIC */
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#ifdef CONFIG_X86_IO_APIC
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static struct irq_domain_ops sfi_ioapic_irqdomain_ops;
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static int __init sfi_parse_ioapic(struct sfi_table_header *table)
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{
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struct sfi_table_simple *sb;
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struct sfi_apic_table_entry *pentry;
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int i, num;
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struct ioapic_domain_cfg cfg = {
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.type = IOAPIC_DOMAIN_STRICT,
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.ops = &sfi_ioapic_irqdomain_ops,
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};
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sb = (struct sfi_table_simple *)table;
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num = SFI_GET_NUM_ENTRIES(sb, struct sfi_apic_table_entry);
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pentry = (struct sfi_apic_table_entry *)sb->pentry;
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for (i = 0; i < num; i++) {
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mp_register_ioapic(i, pentry->phys_addr, gsi_top, &cfg);
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pentry++;
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}
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WARN(pic_mode, KERN_WARNING
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"SFI: pic_mod shouldn't be 1 when IOAPIC table is present\n");
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pic_mode = 0;
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return 0;
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}
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#endif /* CONFIG_X86_IO_APIC */
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/*
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* sfi_platform_init(): register lapics & io-apics
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*/
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int __init sfi_platform_init(void)
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{
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#ifdef CONFIG_X86_LOCAL_APIC
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register_lapic_address(sfi_lapic_addr);
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sfi_table_parse(SFI_SIG_CPUS, NULL, NULL, sfi_parse_cpus);
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#endif
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#ifdef CONFIG_X86_IO_APIC
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sfi_table_parse(SFI_SIG_APIC, NULL, NULL, sfi_parse_ioapic);
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#endif
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return 0;
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}
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