1 files changed, 579 insertions, 0 deletions

diff --git a/arch/x86/kernel/apic/summit_32.c b/arch/x86/kernel/apic/summit_32.c
new file mode 100644
index 000000000000..aac52fa873ff
--- /dev/null
+++ b/arch/x86/kernel/apic/summit_32.c
@@ -0,0 +1,579 @@
+/*
+ * 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 <colpatch@us.ibm.com>
+ *
+ */
+
+#include <linux/mm.h>
+#include <linux/init.h>
+#include <asm/io.h>
+#include <asm/bios_ebda.h>
+
+/*
+ * APIC driver for the IBM "Summit" chipset.
+ */
+#include <linux/threads.h>
+#include <linux/cpumask.h>
+#include <asm/mpspec.h>
+#include <asm/apic.h>
+#include <asm/smp.h>
+#include <asm/fixmap.h>
+#include <asm/apicdef.h>
+#include <asm/ipi.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/init.h>
+#include <linux/gfp.h>
+#include <linux/smp.h>
+
+static unsigned summit_get_apic_id(unsigned long x)
+{
+        return (x >> 24) & 0xFF;
+}
+
+static inline void summit_send_IPI_mask(const cpumask_t *mask, int vector)
+{
+        default_send_IPI_mask_sequence_logical(mask, vector);
+}
+
+static void summit_send_IPI_allbutself(int vector)
+{
+        cpumask_t mask = cpu_online_map;
+        cpu_clear(smp_processor_id(), mask);
+
+        if (!cpus_empty(mask))
+                summit_send_IPI_mask(&mask, vector);
+}
+
+static void summit_send_IPI_all(int vector)
+{
+        summit_send_IPI_mask(&cpu_online_map, vector);
+}
+
+#include <asm/tsc.h>
+
+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_cpu(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.
+         */
+        *retmask = (cpumask_t){ { [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,
+};