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107e0e0cd8
This will pave the way for each apic driver to be self-contained and eliminate the need for apic_probe[]. Order in which apic drivers are listed in the .apicdrivers section is important, as this determines the apic probe order. And this is enforced by the ordering of apic driver files in the Makefile and the macros apic_driver()/apic_drivers(). Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com> Tested-by: Cyrill Gorcunov <gorcunov@openvz.org> Cc: steiner@sgi.com Cc: gorcunov@openvz.org Cc: yinghai@kernel.org Link: http://lkml.kernel.org/r/20110521005526.068775085@sbsiddha-MOBL3.sc.intel.com Signed-off-by: Ingo Molnar <mingo@elte.hu>
258 lines
6 KiB
C
258 lines
6 KiB
C
/*
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* APIC driver for "bigsmp" xAPIC machines with more than 8 virtual CPUs.
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*
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* Drives the local APIC in "clustered mode".
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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 <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/dmi.h>
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#include <linux/smp.h>
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#include <asm/apicdef.h>
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#include <asm/fixmap.h>
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#include <asm/mpspec.h>
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#include <asm/apic.h>
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#include <asm/ipi.h>
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static unsigned bigsmp_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 int bigsmp_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 *bigsmp_target_cpus(void)
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{
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#ifdef CONFIG_SMP
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return cpu_online_mask;
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#else
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return cpumask_of(0);
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#endif
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}
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static unsigned long bigsmp_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 bigsmp_check_apicid_present(int bit)
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{
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return 1;
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}
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static int bigsmp_early_logical_apicid(int cpu)
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{
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/* on bigsmp, logical apicid is the same as physical */
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return early_per_cpu(x86_cpu_to_apicid, cpu);
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}
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static inline unsigned long calculate_ldr(int cpu)
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{
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unsigned long val, id;
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val = apic_read(APIC_LDR) & ~APIC_LDR_MASK;
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id = per_cpu(x86_bios_cpu_apicid, cpu);
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val |= SET_APIC_LOGICAL_ID(id);
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return val;
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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 bigsmp_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 bigsmp_setup_apic_routing(void)
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{
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printk(KERN_INFO
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"Enabling APIC mode: Physflat. Using %d I/O APICs\n",
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nr_ioapics);
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}
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static int bigsmp_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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return BAD_APICID;
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}
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static void bigsmp_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 bigsmp_check_phys_apicid_present(int phys_apicid)
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{
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return 1;
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}
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/* As we are using single CPU as destination, pick only one CPU here */
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static unsigned int bigsmp_cpu_mask_to_apicid(const struct cpumask *cpumask)
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{
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int cpu = cpumask_first(cpumask);
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if (cpu < nr_cpu_ids)
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return cpu_physical_id(cpu);
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return BAD_APICID;
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}
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static unsigned int bigsmp_cpu_mask_to_apicid_and(const struct cpumask *cpumask,
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const struct cpumask *andmask)
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{
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int cpu;
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/*
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* We're using fixed IRQ delivery, can only return one phys APIC ID.
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* May as well be the first.
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*/
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for_each_cpu_and(cpu, cpumask, andmask) {
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if (cpumask_test_cpu(cpu, cpu_online_mask))
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return cpu_physical_id(cpu);
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}
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return BAD_APICID;
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}
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static int bigsmp_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 inline void bigsmp_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 bigsmp_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 bigsmp_send_IPI_all(int vector)
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{
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bigsmp_send_IPI_mask(cpu_online_mask, vector);
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}
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static int dmi_bigsmp; /* can be set by dmi scanners */
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static int hp_ht_bigsmp(const struct dmi_system_id *d)
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{
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printk(KERN_NOTICE "%s detected: force use of apic=bigsmp\n", d->ident);
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dmi_bigsmp = 1;
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return 0;
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}
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static const struct dmi_system_id bigsmp_dmi_table[] = {
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{ hp_ht_bigsmp, "HP ProLiant DL760 G2",
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{ DMI_MATCH(DMI_BIOS_VENDOR, "HP"),
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DMI_MATCH(DMI_BIOS_VERSION, "P44-"),
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}
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},
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{ hp_ht_bigsmp, "HP ProLiant DL740",
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{ DMI_MATCH(DMI_BIOS_VENDOR, "HP"),
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DMI_MATCH(DMI_BIOS_VERSION, "P47-"),
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}
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},
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{ } /* NULL entry stops DMI scanning */
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};
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static void bigsmp_vector_allocation_domain(int cpu, struct cpumask *retmask)
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{
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cpumask_clear(retmask);
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cpumask_set_cpu(cpu, retmask);
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}
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static int probe_bigsmp(void)
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{
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if (def_to_bigsmp)
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dmi_bigsmp = 1;
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else
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dmi_check_system(bigsmp_dmi_table);
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return dmi_bigsmp;
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}
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struct apic apic_bigsmp = {
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.name = "bigsmp",
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.probe = probe_bigsmp,
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.acpi_madt_oem_check = NULL,
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.apic_id_registered = bigsmp_apic_id_registered,
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.irq_delivery_mode = dest_Fixed,
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/* phys delivery to target CPU: */
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.irq_dest_mode = 0,
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.target_cpus = bigsmp_target_cpus,
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.disable_esr = 1,
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.dest_logical = 0,
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.check_apicid_used = bigsmp_check_apicid_used,
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.check_apicid_present = bigsmp_check_apicid_present,
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.vector_allocation_domain = bigsmp_vector_allocation_domain,
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.init_apic_ldr = bigsmp_init_apic_ldr,
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.ioapic_phys_id_map = bigsmp_ioapic_phys_id_map,
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.setup_apic_routing = bigsmp_setup_apic_routing,
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.multi_timer_check = NULL,
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.cpu_present_to_apicid = bigsmp_cpu_present_to_apicid,
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.apicid_to_cpu_present = physid_set_mask_of_physid,
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.setup_portio_remap = NULL,
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.check_phys_apicid_present = bigsmp_check_phys_apicid_present,
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.enable_apic_mode = NULL,
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.phys_pkg_id = bigsmp_phys_pkg_id,
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.mps_oem_check = NULL,
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.get_apic_id = bigsmp_get_apic_id,
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.set_apic_id = NULL,
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.apic_id_mask = 0xFF << 24,
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.cpu_mask_to_apicid = bigsmp_cpu_mask_to_apicid,
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.cpu_mask_to_apicid_and = bigsmp_cpu_mask_to_apicid_and,
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.send_IPI_mask = bigsmp_send_IPI_mask,
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.send_IPI_mask_allbutself = NULL,
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.send_IPI_allbutself = bigsmp_send_IPI_allbutself,
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.send_IPI_all = bigsmp_send_IPI_all,
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.send_IPI_self = default_send_IPI_self,
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.trampoline_phys_low = DEFAULT_TRAMPOLINE_PHYS_LOW,
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.trampoline_phys_high = DEFAULT_TRAMPOLINE_PHYS_HIGH,
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.wait_for_init_deassert = default_wait_for_init_deassert,
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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,
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.x86_32_early_logical_apicid = bigsmp_early_logical_apicid,
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};
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apic_driver(apic_bigsmp);
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