/* * IBM Summit-Specific Code * * Written By: Matthew Dobson, IBM Corporation * * Copyright (c) 2003 IBM Corp. * * All rights reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or (at * your option) any later version. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or * NON INFRINGEMENT. See the GNU General Public License for more * details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. * * Send feedback to * */ #include #include #include #include /* * APIC driver for the IBM "Summit" chipset. */ #include #include #include #include #include #include #include #include #include #include #include #include #include static unsigned summit_get_apic_id(unsigned long x) { return (x >> 24) & 0xFF; } static inline void summit_send_IPI_mask(const struct cpumask *mask, int vector) { default_send_IPI_mask_sequence_logical(mask, vector); } static void summit_send_IPI_allbutself(int vector) { default_send_IPI_mask_allbutself_logical(cpu_online_mask, vector); } static void summit_send_IPI_all(int vector) { summit_send_IPI_mask(cpu_online_mask, vector); } #include extern int use_cyclone; #ifdef CONFIG_X86_SUMMIT_NUMA static void setup_summit(void); #else static inline void setup_summit(void) {} #endif static int summit_mps_oem_check(struct mpc_table *mpc, char *oem, char *productid) { if (!strncmp(oem, "IBM ENSW", 8) && (!strncmp(productid, "VIGIL SMP", 9) || !strncmp(productid, "EXA", 3) || !strncmp(productid, "RUTHLESS SMP", 12))){ mark_tsc_unstable("Summit based system"); use_cyclone = 1; /*enable cyclone-timer*/ setup_summit(); return 1; } return 0; } /* Hook from generic ACPI tables.c */ static int summit_acpi_madt_oem_check(char *oem_id, char *oem_table_id) { if (!strncmp(oem_id, "IBM", 3) && (!strncmp(oem_table_id, "SERVIGIL", 8) || !strncmp(oem_table_id, "EXA", 3))){ mark_tsc_unstable("Summit based system"); use_cyclone = 1; /*enable cyclone-timer*/ setup_summit(); return 1; } return 0; } struct rio_table_hdr { unsigned char version; /* Version number of this data structure */ /* Version 3 adds chassis_num & WP_index */ unsigned char num_scal_dev; /* # of Scalability devices (Twisters for Vigil) */ unsigned char num_rio_dev; /* # of RIO I/O devices (Cyclones and Winnipegs) */ } __attribute__((packed)); struct scal_detail { unsigned char node_id; /* Scalability Node ID */ unsigned long CBAR; /* Address of 1MB register space */ unsigned char port0node; /* Node ID port connected to: 0xFF=None */ unsigned char port0port; /* Port num port connected to: 0,1,2, or 0xFF=None */ unsigned char port1node; /* Node ID port connected to: 0xFF = None */ unsigned char port1port; /* Port num port connected to: 0,1,2, or 0xFF=None */ unsigned char port2node; /* Node ID port connected to: 0xFF = None */ unsigned char port2port; /* Port num port connected to: 0,1,2, or 0xFF=None */ unsigned char chassis_num; /* 1 based Chassis number (1 = boot node) */ } __attribute__((packed)); struct rio_detail { unsigned char node_id; /* RIO Node ID */ unsigned long BBAR; /* Address of 1MB register space */ unsigned char type; /* Type of device */ unsigned char owner_id; /* For WPEG: Node ID of Cyclone that owns this WPEG*/ /* For CYC: Node ID of Twister that owns this CYC */ unsigned char port0node; /* Node ID port connected to: 0xFF=None */ unsigned char port0port; /* Port num port connected to: 0,1,2, or 0xFF=None */ unsigned char port1node; /* Node ID port connected to: 0xFF=None */ unsigned char port1port; /* Port num port connected to: 0,1,2, or 0xFF=None */ unsigned char first_slot; /* For WPEG: Lowest slot number below this WPEG */ /* For CYC: 0 */ unsigned char status; /* For WPEG: Bit 0 = 1 : the XAPIC is used */ /* = 0 : the XAPIC is not used, ie:*/ /* ints fwded to another XAPIC */ /* Bits1:7 Reserved */ /* For CYC: Bits0:7 Reserved */ unsigned char WP_index; /* For WPEG: WPEG instance index - lower ones have */ /* lower slot numbers/PCI bus numbers */ /* For CYC: No meaning */ unsigned char chassis_num; /* 1 based Chassis number */ /* For LookOut WPEGs this field indicates the */ /* Expansion Chassis #, enumerated from Boot */ /* Node WPEG external port, then Boot Node CYC */ /* external port, then Next Vigil chassis WPEG */ /* external port, etc. */ /* Shared Lookouts have only 1 chassis number (the */ /* first one assigned) */ } __attribute__((packed)); typedef enum { CompatTwister = 0, /* Compatibility Twister */ AltTwister = 1, /* Alternate Twister of internal 8-way */ CompatCyclone = 2, /* Compatibility Cyclone */ AltCyclone = 3, /* Alternate Cyclone of internal 8-way */ CompatWPEG = 4, /* Compatibility WPEG */ AltWPEG = 5, /* Second Planar WPEG */ LookOutAWPEG = 6, /* LookOut WPEG */ LookOutBWPEG = 7, /* LookOut WPEG */ } node_type; static inline int is_WPEG(struct rio_detail *rio){ return (rio->type == CompatWPEG || rio->type == AltWPEG || rio->type == LookOutAWPEG || rio->type == LookOutBWPEG); } /* In clustered mode, the high nibble of APIC ID is a cluster number. * The low nibble is a 4-bit bitmap. */ #define XAPIC_DEST_CPUS_SHIFT 4 #define XAPIC_DEST_CPUS_MASK ((1u << XAPIC_DEST_CPUS_SHIFT) - 1) #define XAPIC_DEST_CLUSTER_MASK (XAPIC_DEST_CPUS_MASK << XAPIC_DEST_CPUS_SHIFT) #define SUMMIT_APIC_DFR_VALUE (APIC_DFR_CLUSTER) static const cpumask_t *summit_target_cpus(void) { /* CPU_MASK_ALL (0xff) has undefined behaviour with * dest_LowestPrio mode logical clustered apic interrupt routing * Just start on cpu 0. IRQ balancing will spread load */ return cpumask_of(0); } static unsigned long summit_check_apicid_used(physid_mask_t bitmap, int apicid) { return 0; } /* we don't use the phys_cpu_present_map to indicate apicid presence */ static unsigned long summit_check_apicid_present(int bit) { return 1; } static void summit_init_apic_ldr(void) { unsigned long val, id; int count = 0; u8 my_id = (u8)hard_smp_processor_id(); u8 my_cluster = APIC_CLUSTER(my_id); #ifdef CONFIG_SMP u8 lid; int i; /* Create logical APIC IDs by counting CPUs already in cluster. */ for (count = 0, i = nr_cpu_ids; --i >= 0; ) { lid = cpu_2_logical_apicid[i]; if (lid != BAD_APICID && APIC_CLUSTER(lid) == my_cluster) ++count; } #endif /* We only have a 4 wide bitmap in cluster mode. If a deranged * BIOS puts 5 CPUs in one APIC cluster, we're hosed. */ BUG_ON(count >= XAPIC_DEST_CPUS_SHIFT); id = my_cluster | (1UL << count); apic_write(APIC_DFR, SUMMIT_APIC_DFR_VALUE); val = apic_read(APIC_LDR) & ~APIC_LDR_MASK; val |= SET_APIC_LOGICAL_ID(id); apic_write(APIC_LDR, val); } static int summit_apic_id_registered(void) { return 1; } static void summit_setup_apic_routing(void) { printk("Enabling APIC mode: Summit. Using %d I/O APICs\n", nr_ioapics); } static int summit_apicid_to_node(int logical_apicid) { #ifdef CONFIG_SMP return apicid_2_node[hard_smp_processor_id()]; #else return 0; #endif } /* Mapping from cpu number to logical apicid */ static inline int summit_cpu_to_logical_apicid(int cpu) { #ifdef CONFIG_SMP if (cpu >= nr_cpu_ids) return BAD_APICID; return cpu_2_logical_apicid[cpu]; #else return logical_smp_processor_id(); #endif } static int summit_cpu_present_to_apicid(int mps_cpu) { if (mps_cpu < nr_cpu_ids) return (int)per_cpu(x86_bios_cpu_apicid, mps_cpu); else return BAD_APICID; } static physid_mask_t summit_ioapic_phys_id_map(physid_mask_t phys_id_map) { /* For clustered we don't have a good way to do this yet - hack */ return physids_promote(0x0F); } static physid_mask_t summit_apicid_to_cpu_present(int apicid) { return physid_mask_of_physid(0); } static int summit_check_phys_apicid_present(int boot_cpu_physical_apicid) { return 1; } static unsigned int summit_cpu_mask_to_apicid(const cpumask_t *cpumask) { unsigned int round = 0; int cpu, apicid = 0; /* * The cpus in the mask must all be on the apic cluster. */ for_each_cpu(cpu, cpumask) { int new_apicid = summit_cpu_to_logical_apicid(cpu); if (round && APIC_CLUSTER(apicid) != APIC_CLUSTER(new_apicid)) { printk("%s: Not a valid mask!\n", __func__); return BAD_APICID; } apicid |= new_apicid; round++; } return apicid; } static unsigned int summit_cpu_mask_to_apicid_and(const struct cpumask *inmask, const struct cpumask *andmask) { int apicid = summit_cpu_to_logical_apicid(0); cpumask_var_t cpumask; if (!alloc_cpumask_var(&cpumask, GFP_ATOMIC)) return apicid; cpumask_and(cpumask, inmask, andmask); cpumask_and(cpumask, cpumask, cpu_online_mask); apicid = summit_cpu_mask_to_apicid(cpumask); free_cpumask_var(cpumask); return apicid; } /* * cpuid returns the value latched in the HW at reset, not the APIC ID * register's value. For any box whose BIOS changes APIC IDs, like * clustered APIC systems, we must use hard_smp_processor_id. * * See Intel's IA-32 SW Dev's Manual Vol2 under CPUID. */ static int summit_phys_pkg_id(int cpuid_apic, int index_msb) { return hard_smp_processor_id() >> index_msb; } static int probe_summit(void) { /* probed later in mptable/ACPI hooks */ return 0; } static void summit_vector_allocation_domain(int cpu, cpumask_t *retmask) { /* Careful. Some cpus do not strictly honor the set of cpus * specified in the interrupt destination when using lowest * priority interrupt delivery mode. * * In particular there was a hyperthreading cpu observed to * deliver interrupts to the wrong hyperthread when only one * hyperthread was specified in the interrupt desitination. */ cpumask_clear(retmask); cpumask_bits(retmask)[0] = APIC_ALL_CPUS; } #ifdef CONFIG_X86_SUMMIT_NUMA static struct rio_table_hdr *rio_table_hdr; static struct scal_detail *scal_devs[MAX_NUMNODES]; static struct rio_detail *rio_devs[MAX_NUMNODES*4]; #ifndef CONFIG_X86_NUMAQ static int mp_bus_id_to_node[MAX_MP_BUSSES]; #endif static int setup_pci_node_map_for_wpeg(int wpeg_num, int last_bus) { int twister = 0, node = 0; int i, bus, num_buses; for (i = 0; i < rio_table_hdr->num_rio_dev; i++) { if (rio_devs[i]->node_id == rio_devs[wpeg_num]->owner_id) { twister = rio_devs[i]->owner_id; break; } } if (i == rio_table_hdr->num_rio_dev) { printk(KERN_ERR "%s: Couldn't find owner Cyclone for Winnipeg!\n", __func__); return last_bus; } for (i = 0; i < rio_table_hdr->num_scal_dev; i++) { if (scal_devs[i]->node_id == twister) { node = scal_devs[i]->node_id; break; } } if (i == rio_table_hdr->num_scal_dev) { printk(KERN_ERR "%s: Couldn't find owner Twister for Cyclone!\n", __func__); return last_bus; } switch (rio_devs[wpeg_num]->type) { case CompatWPEG: /* * The Compatibility Winnipeg controls the 2 legacy buses, * the 66MHz PCI bus [2 slots] and the 2 "extra" buses in case * a PCI-PCI bridge card is used in either slot: total 5 buses. */ num_buses = 5; break; case AltWPEG: /* * The Alternate Winnipeg controls the 2 133MHz buses [1 slot * each], their 2 "extra" buses, the 100MHz bus [2 slots] and * the "extra" buses for each of those slots: total 7 buses. */ num_buses = 7; break; case LookOutAWPEG: case LookOutBWPEG: /* * A Lookout Winnipeg controls 3 100MHz buses [2 slots each] * & the "extra" buses for each of those slots: total 9 buses. */ num_buses = 9; break; default: printk(KERN_INFO "%s: Unsupported Winnipeg type!\n", __func__); return last_bus; } for (bus = last_bus; bus < last_bus + num_buses; bus++) mp_bus_id_to_node[bus] = node; return bus; } static int build_detail_arrays(void) { unsigned long ptr; int i, scal_detail_size, rio_detail_size; if (rio_table_hdr->num_scal_dev > MAX_NUMNODES) { 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); return 0; } switch (rio_table_hdr->version) { default: printk(KERN_WARNING "%s: Invalid Rio Grande Table Version: %d\n", __func__, rio_table_hdr->version); return 0; case 2: scal_detail_size = 11; rio_detail_size = 13; break; case 3: scal_detail_size = 12; rio_detail_size = 15; break; } ptr = (unsigned long)rio_table_hdr + 3; for (i = 0; i < rio_table_hdr->num_scal_dev; i++, ptr += scal_detail_size) scal_devs[i] = (struct scal_detail *)ptr; for (i = 0; i < rio_table_hdr->num_rio_dev; i++, ptr += rio_detail_size) rio_devs[i] = (struct rio_detail *)ptr; return 1; } void setup_summit(void) { unsigned long ptr; unsigned short offset; int i, next_wpeg, next_bus = 0; /* The pointer to the EBDA is stored in the word @ phys 0x40E(40:0E) */ ptr = get_bios_ebda(); ptr = (unsigned long)phys_to_virt(ptr); rio_table_hdr = NULL; offset = 0x180; while (offset) { /* The block id is stored in the 2nd word */ 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, };