73e907de7d
Impact: cleanup We are removing cpumask_t in favour of struct cpumask: mainly as a marker of what code is now CONFIG_CPUMASK_OFFSTACK-safe. The only non-trivial change here is vector_allocation_domain(): explicitly clear the mask and set the first word, rather than using assignment. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
576 lines
18 KiB
C
576 lines
18 KiB
C
/*
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* IBM Summit-Specific Code
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*
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* Written By: Matthew Dobson, IBM Corporation
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*
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* Copyright (c) 2003 IBM Corp.
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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 <colpatch@us.ibm.com>
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*
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*/
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#include <linux/mm.h>
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#include <linux/init.h>
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#include <asm/io.h>
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#include <asm/bios_ebda.h>
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/*
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* APIC driver for the IBM "Summit" chipset.
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*/
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#include <linux/threads.h>
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#include <linux/cpumask.h>
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#include <asm/mpspec.h>
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#include <asm/apic.h>
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#include <asm/smp.h>
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#include <asm/fixmap.h>
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#include <asm/apicdef.h>
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#include <asm/ipi.h>
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#include <linux/kernel.h>
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#include <linux/string.h>
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#include <linux/init.h>
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#include <linux/gfp.h>
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#include <linux/smp.h>
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static unsigned summit_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 inline void summit_send_IPI_mask(const struct cpumask *mask, int vector)
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{
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default_send_IPI_mask_sequence_logical(mask, vector);
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}
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static void summit_send_IPI_allbutself(int vector)
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{
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default_send_IPI_mask_allbutself_logical(cpu_online_mask, vector);
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}
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static void summit_send_IPI_all(int vector)
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{
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summit_send_IPI_mask(cpu_online_mask, vector);
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}
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#include <asm/tsc.h>
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extern int use_cyclone;
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#ifdef CONFIG_X86_SUMMIT_NUMA
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static void setup_summit(void);
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#else
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static inline void setup_summit(void) {}
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#endif
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static int summit_mps_oem_check(struct mpc_table *mpc, char *oem,
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char *productid)
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{
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if (!strncmp(oem, "IBM ENSW", 8) &&
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(!strncmp(productid, "VIGIL SMP", 9)
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|| !strncmp(productid, "EXA", 3)
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|| !strncmp(productid, "RUTHLESS SMP", 12))){
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mark_tsc_unstable("Summit based system");
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use_cyclone = 1; /*enable cyclone-timer*/
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setup_summit();
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return 1;
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}
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return 0;
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}
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/* Hook from generic ACPI tables.c */
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static int summit_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
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{
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if (!strncmp(oem_id, "IBM", 3) &&
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(!strncmp(oem_table_id, "SERVIGIL", 8)
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|| !strncmp(oem_table_id, "EXA", 3))){
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mark_tsc_unstable("Summit based system");
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use_cyclone = 1; /*enable cyclone-timer*/
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setup_summit();
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return 1;
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}
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return 0;
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}
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struct rio_table_hdr {
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unsigned char version; /* Version number of this data structure */
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/* Version 3 adds chassis_num & WP_index */
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unsigned char num_scal_dev; /* # of Scalability devices (Twisters for Vigil) */
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unsigned char num_rio_dev; /* # of RIO I/O devices (Cyclones and Winnipegs) */
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} __attribute__((packed));
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struct scal_detail {
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unsigned char node_id; /* Scalability Node ID */
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unsigned long CBAR; /* Address of 1MB register space */
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unsigned char port0node; /* Node ID port connected to: 0xFF=None */
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unsigned char port0port; /* Port num port connected to: 0,1,2, or 0xFF=None */
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unsigned char port1node; /* Node ID port connected to: 0xFF = None */
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unsigned char port1port; /* Port num port connected to: 0,1,2, or 0xFF=None */
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unsigned char port2node; /* Node ID port connected to: 0xFF = None */
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unsigned char port2port; /* Port num port connected to: 0,1,2, or 0xFF=None */
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unsigned char chassis_num; /* 1 based Chassis number (1 = boot node) */
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} __attribute__((packed));
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struct rio_detail {
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unsigned char node_id; /* RIO Node ID */
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unsigned long BBAR; /* Address of 1MB register space */
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unsigned char type; /* Type of device */
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unsigned char owner_id; /* For WPEG: Node ID of Cyclone that owns this WPEG*/
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/* For CYC: Node ID of Twister that owns this CYC */
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unsigned char port0node; /* Node ID port connected to: 0xFF=None */
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unsigned char port0port; /* Port num port connected to: 0,1,2, or 0xFF=None */
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unsigned char port1node; /* Node ID port connected to: 0xFF=None */
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unsigned char port1port; /* Port num port connected to: 0,1,2, or 0xFF=None */
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unsigned char first_slot; /* For WPEG: Lowest slot number below this WPEG */
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/* For CYC: 0 */
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unsigned char status; /* For WPEG: Bit 0 = 1 : the XAPIC is used */
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/* = 0 : the XAPIC is not used, ie:*/
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/* ints fwded to another XAPIC */
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/* Bits1:7 Reserved */
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/* For CYC: Bits0:7 Reserved */
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unsigned char WP_index; /* For WPEG: WPEG instance index - lower ones have */
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/* lower slot numbers/PCI bus numbers */
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/* For CYC: No meaning */
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unsigned char chassis_num; /* 1 based Chassis number */
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/* For LookOut WPEGs this field indicates the */
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/* Expansion Chassis #, enumerated from Boot */
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/* Node WPEG external port, then Boot Node CYC */
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/* external port, then Next Vigil chassis WPEG */
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/* external port, etc. */
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/* Shared Lookouts have only 1 chassis number (the */
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/* first one assigned) */
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} __attribute__((packed));
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typedef enum {
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CompatTwister = 0, /* Compatibility Twister */
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AltTwister = 1, /* Alternate Twister of internal 8-way */
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CompatCyclone = 2, /* Compatibility Cyclone */
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AltCyclone = 3, /* Alternate Cyclone of internal 8-way */
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CompatWPEG = 4, /* Compatibility WPEG */
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AltWPEG = 5, /* Second Planar WPEG */
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LookOutAWPEG = 6, /* LookOut WPEG */
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LookOutBWPEG = 7, /* LookOut WPEG */
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} node_type;
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static inline int is_WPEG(struct rio_detail *rio){
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return (rio->type == CompatWPEG || rio->type == AltWPEG ||
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rio->type == LookOutAWPEG || rio->type == LookOutBWPEG);
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}
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/* In clustered mode, the high nibble of APIC ID is a cluster number.
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* The low nibble is a 4-bit bitmap. */
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#define XAPIC_DEST_CPUS_SHIFT 4
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#define XAPIC_DEST_CPUS_MASK ((1u << XAPIC_DEST_CPUS_SHIFT) - 1)
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#define XAPIC_DEST_CLUSTER_MASK (XAPIC_DEST_CPUS_MASK << XAPIC_DEST_CPUS_SHIFT)
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#define SUMMIT_APIC_DFR_VALUE (APIC_DFR_CLUSTER)
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static const struct cpumask *summit_target_cpus(void)
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{
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/* CPU_MASK_ALL (0xff) has undefined behaviour with
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* dest_LowestPrio mode logical clustered apic interrupt routing
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* Just start on cpu 0. IRQ balancing will spread load
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*/
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return cpumask_of(0);
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}
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static unsigned long summit_check_apicid_used(physid_mask_t bitmap, int apicid)
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{
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return 0;
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}
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/* we don't use the phys_cpu_present_map to indicate apicid presence */
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static unsigned long summit_check_apicid_present(int bit)
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{
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return 1;
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}
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static void summit_init_apic_ldr(void)
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{
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unsigned long val, id;
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int count = 0;
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u8 my_id = (u8)hard_smp_processor_id();
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u8 my_cluster = APIC_CLUSTER(my_id);
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#ifdef CONFIG_SMP
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u8 lid;
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int i;
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/* Create logical APIC IDs by counting CPUs already in cluster. */
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for (count = 0, i = nr_cpu_ids; --i >= 0; ) {
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lid = cpu_2_logical_apicid[i];
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if (lid != BAD_APICID && APIC_CLUSTER(lid) == my_cluster)
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++count;
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}
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#endif
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/* We only have a 4 wide bitmap in cluster mode. If a deranged
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* BIOS puts 5 CPUs in one APIC cluster, we're hosed. */
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BUG_ON(count >= XAPIC_DEST_CPUS_SHIFT);
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id = my_cluster | (1UL << count);
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apic_write(APIC_DFR, SUMMIT_APIC_DFR_VALUE);
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val = apic_read(APIC_LDR) & ~APIC_LDR_MASK;
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val |= SET_APIC_LOGICAL_ID(id);
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apic_write(APIC_LDR, val);
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}
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static int summit_apic_id_registered(void)
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{
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return 1;
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}
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static void summit_setup_apic_routing(void)
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{
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printk("Enabling APIC mode: Summit. Using %d I/O APICs\n",
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nr_ioapics);
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}
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static int summit_apicid_to_node(int logical_apicid)
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{
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#ifdef CONFIG_SMP
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return apicid_2_node[hard_smp_processor_id()];
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#else
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return 0;
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#endif
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}
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/* Mapping from cpu number to logical apicid */
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static inline int summit_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 int summit_cpu_present_to_apicid(int mps_cpu)
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{
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if (mps_cpu < nr_cpu_ids)
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return (int)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 physid_mask_t summit_ioapic_phys_id_map(physid_mask_t phys_id_map)
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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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return physids_promote(0x0F);
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}
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static physid_mask_t summit_apicid_to_cpu_present(int apicid)
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{
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return physid_mask_of_physid(0);
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}
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static int summit_check_phys_apicid_present(int boot_cpu_physical_apicid)
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{
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return 1;
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}
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static unsigned int summit_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, apicid = 0;
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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 = summit_cpu_to_logical_apicid(cpu);
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if (round && APIC_CLUSTER(apicid) != APIC_CLUSTER(new_apicid)) {
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printk("%s: Not a valid mask!\n", __func__);
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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 summit_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 = summit_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 = summit_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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/*
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* cpuid returns the value latched in the HW at reset, not the APIC ID
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* register's value. For any box whose BIOS changes APIC IDs, like
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* clustered APIC systems, we must use hard_smp_processor_id.
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*
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* See Intel's IA-32 SW Dev's Manual Vol2 under CPUID.
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*/
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static int summit_phys_pkg_id(int cpuid_apic, int index_msb)
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{
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return hard_smp_processor_id() >> index_msb;
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}
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static int probe_summit(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 void summit_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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#ifdef CONFIG_X86_SUMMIT_NUMA
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static struct rio_table_hdr *rio_table_hdr;
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static struct scal_detail *scal_devs[MAX_NUMNODES];
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static struct rio_detail *rio_devs[MAX_NUMNODES*4];
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#ifndef CONFIG_X86_NUMAQ
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static int mp_bus_id_to_node[MAX_MP_BUSSES];
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#endif
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static int setup_pci_node_map_for_wpeg(int wpeg_num, int last_bus)
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{
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int twister = 0, node = 0;
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int i, bus, num_buses;
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for (i = 0; i < rio_table_hdr->num_rio_dev; i++) {
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if (rio_devs[i]->node_id == rio_devs[wpeg_num]->owner_id) {
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twister = rio_devs[i]->owner_id;
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break;
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}
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}
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if (i == rio_table_hdr->num_rio_dev) {
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printk(KERN_ERR "%s: Couldn't find owner Cyclone for Winnipeg!\n", __func__);
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return last_bus;
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}
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for (i = 0; i < rio_table_hdr->num_scal_dev; i++) {
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if (scal_devs[i]->node_id == twister) {
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node = scal_devs[i]->node_id;
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break;
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}
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}
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if (i == rio_table_hdr->num_scal_dev) {
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printk(KERN_ERR "%s: Couldn't find owner Twister for Cyclone!\n", __func__);
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return last_bus;
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}
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switch (rio_devs[wpeg_num]->type) {
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case CompatWPEG:
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/*
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* The Compatibility Winnipeg controls the 2 legacy buses,
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* the 66MHz PCI bus [2 slots] and the 2 "extra" buses in case
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* a PCI-PCI bridge card is used in either slot: total 5 buses.
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*/
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num_buses = 5;
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break;
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case AltWPEG:
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/*
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* The Alternate Winnipeg controls the 2 133MHz buses [1 slot
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* each], their 2 "extra" buses, the 100MHz bus [2 slots] and
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* the "extra" buses for each of those slots: total 7 buses.
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*/
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num_buses = 7;
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break;
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case LookOutAWPEG:
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case LookOutBWPEG:
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/*
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* A Lookout Winnipeg controls 3 100MHz buses [2 slots each]
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* & the "extra" buses for each of those slots: total 9 buses.
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*/
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num_buses = 9;
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break;
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default:
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printk(KERN_INFO "%s: Unsupported Winnipeg type!\n", __func__);
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return last_bus;
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}
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for (bus = last_bus; bus < last_bus + num_buses; bus++)
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mp_bus_id_to_node[bus] = node;
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return bus;
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}
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static int build_detail_arrays(void)
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{
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unsigned long ptr;
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int i, scal_detail_size, rio_detail_size;
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if (rio_table_hdr->num_scal_dev > MAX_NUMNODES) {
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printk(KERN_WARNING "%s: MAX_NUMNODES too low! Defined as %d, but system has %d nodes.\n", __func__, MAX_NUMNODES, rio_table_hdr->num_scal_dev);
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return 0;
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}
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switch (rio_table_hdr->version) {
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default:
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printk(KERN_WARNING "%s: Invalid Rio Grande Table Version: %d\n", __func__, rio_table_hdr->version);
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return 0;
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case 2:
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scal_detail_size = 11;
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rio_detail_size = 13;
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break;
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case 3:
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scal_detail_size = 12;
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rio_detail_size = 15;
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break;
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}
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ptr = (unsigned long)rio_table_hdr + 3;
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for (i = 0; i < rio_table_hdr->num_scal_dev; i++, ptr += scal_detail_size)
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scal_devs[i] = (struct scal_detail *)ptr;
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for (i = 0; i < rio_table_hdr->num_rio_dev; i++, ptr += rio_detail_size)
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rio_devs[i] = (struct rio_detail *)ptr;
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return 1;
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}
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void setup_summit(void)
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{
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unsigned long ptr;
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unsigned short offset;
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int i, next_wpeg, next_bus = 0;
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/* The pointer to the EBDA is stored in the word @ phys 0x40E(40:0E) */
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ptr = get_bios_ebda();
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ptr = (unsigned long)phys_to_virt(ptr);
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rio_table_hdr = NULL;
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offset = 0x180;
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while (offset) {
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/* The block id is stored in the 2nd word */
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if (*((unsigned short *)(ptr + offset + 2)) == 0x4752) {
|
|
/* set the pointer past the offset & block id */
|
|
rio_table_hdr = (struct rio_table_hdr *)(ptr + offset + 4);
|
|
break;
|
|
}
|
|
/* The next offset is stored in the 1st word. 0 means no more */
|
|
offset = *((unsigned short *)(ptr + offset));
|
|
}
|
|
if (!rio_table_hdr) {
|
|
printk(KERN_ERR "%s: Unable to locate Rio Grande Table in EBDA - bailing!\n", __func__);
|
|
return;
|
|
}
|
|
|
|
if (!build_detail_arrays())
|
|
return;
|
|
|
|
/* The first Winnipeg we're looking for has an index of 0 */
|
|
next_wpeg = 0;
|
|
do {
|
|
for (i = 0; i < rio_table_hdr->num_rio_dev; i++) {
|
|
if (is_WPEG(rio_devs[i]) && rio_devs[i]->WP_index == next_wpeg) {
|
|
/* It's the Winnipeg we're looking for! */
|
|
next_bus = setup_pci_node_map_for_wpeg(i, next_bus);
|
|
next_wpeg++;
|
|
break;
|
|
}
|
|
}
|
|
/*
|
|
* If we go through all Rio devices and don't find one with
|
|
* the next index, it means we've found all the Winnipegs,
|
|
* and thus all the PCI buses.
|
|
*/
|
|
if (i == rio_table_hdr->num_rio_dev)
|
|
next_wpeg = 0;
|
|
} while (next_wpeg != 0);
|
|
}
|
|
#endif
|
|
|
|
struct apic apic_summit = {
|
|
|
|
.name = "summit",
|
|
.probe = probe_summit,
|
|
.acpi_madt_oem_check = summit_acpi_madt_oem_check,
|
|
.apic_id_registered = summit_apic_id_registered,
|
|
|
|
.irq_delivery_mode = dest_LowestPrio,
|
|
/* logical delivery broadcast to all CPUs: */
|
|
.irq_dest_mode = 1,
|
|
|
|
.target_cpus = summit_target_cpus,
|
|
.disable_esr = 1,
|
|
.dest_logical = APIC_DEST_LOGICAL,
|
|
.check_apicid_used = summit_check_apicid_used,
|
|
.check_apicid_present = summit_check_apicid_present,
|
|
|
|
.vector_allocation_domain = summit_vector_allocation_domain,
|
|
.init_apic_ldr = summit_init_apic_ldr,
|
|
|
|
.ioapic_phys_id_map = summit_ioapic_phys_id_map,
|
|
.setup_apic_routing = summit_setup_apic_routing,
|
|
.multi_timer_check = NULL,
|
|
.apicid_to_node = summit_apicid_to_node,
|
|
.cpu_to_logical_apicid = summit_cpu_to_logical_apicid,
|
|
.cpu_present_to_apicid = summit_cpu_present_to_apicid,
|
|
.apicid_to_cpu_present = summit_apicid_to_cpu_present,
|
|
.setup_portio_remap = NULL,
|
|
.check_phys_apicid_present = summit_check_phys_apicid_present,
|
|
.enable_apic_mode = NULL,
|
|
.phys_pkg_id = summit_phys_pkg_id,
|
|
.mps_oem_check = summit_mps_oem_check,
|
|
|
|
.get_apic_id = summit_get_apic_id,
|
|
.set_apic_id = NULL,
|
|
.apic_id_mask = 0xFF << 24,
|
|
|
|
.cpu_mask_to_apicid = summit_cpu_mask_to_apicid,
|
|
.cpu_mask_to_apicid_and = summit_cpu_mask_to_apicid_and,
|
|
|
|
.send_IPI_mask = summit_send_IPI_mask,
|
|
.send_IPI_mask_allbutself = NULL,
|
|
.send_IPI_allbutself = summit_send_IPI_allbutself,
|
|
.send_IPI_all = summit_send_IPI_all,
|
|
.send_IPI_self = default_send_IPI_self,
|
|
|
|
.trampoline_phys_low = DEFAULT_TRAMPOLINE_PHYS_LOW,
|
|
.trampoline_phys_high = DEFAULT_TRAMPOLINE_PHYS_HIGH,
|
|
|
|
.wait_for_init_deassert = default_wait_for_init_deassert,
|
|
|
|
.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,
|
|
};
|