12a05180fSIngo Molnar /* 22a05180fSIngo Molnar * APIC driver for "bigsmp" xAPIC machines with more than 8 virtual CPUs. 32a05180fSIngo Molnar * 42a05180fSIngo Molnar * Drives the local APIC in "clustered mode". 52a05180fSIngo Molnar */ 62a05180fSIngo Molnar #include <linux/threads.h> 72a05180fSIngo Molnar #include <linux/cpumask.h> 82a05180fSIngo Molnar #include <linux/kernel.h> 92a05180fSIngo Molnar #include <linux/init.h> 102a05180fSIngo Molnar #include <linux/dmi.h> 112a05180fSIngo Molnar #include <linux/smp.h> 122a05180fSIngo Molnar 132a05180fSIngo Molnar #include <asm/apicdef.h> 142a05180fSIngo Molnar #include <asm/fixmap.h> 152a05180fSIngo Molnar #include <asm/mpspec.h> 162a05180fSIngo Molnar #include <asm/apic.h> 172a05180fSIngo Molnar #include <asm/ipi.h> 182a05180fSIngo Molnar 199694cd6cSJiri Slaby static unsigned bigsmp_get_apic_id(unsigned long x) 202a05180fSIngo Molnar { 212a05180fSIngo Molnar return (x >> 24) & 0xFF; 222a05180fSIngo Molnar } 232a05180fSIngo Molnar 249694cd6cSJiri Slaby static int bigsmp_apic_id_registered(void) 252a05180fSIngo Molnar { 262a05180fSIngo Molnar return 1; 272a05180fSIngo Molnar } 282a05180fSIngo Molnar 294f062896SRusty Russell static const struct cpumask *bigsmp_target_cpus(void) 302a05180fSIngo Molnar { 312a05180fSIngo Molnar #ifdef CONFIG_SMP 324f062896SRusty Russell return cpu_online_mask; 332a05180fSIngo Molnar #else 344f062896SRusty Russell return cpumask_of(0); 352a05180fSIngo Molnar #endif 362a05180fSIngo Molnar } 372a05180fSIngo Molnar 387abc0753SCyrill Gorcunov static unsigned long bigsmp_check_apicid_used(physid_mask_t *map, int apicid) 392a05180fSIngo Molnar { 402a05180fSIngo Molnar return 0; 412a05180fSIngo Molnar } 422a05180fSIngo Molnar 439694cd6cSJiri Slaby static unsigned long bigsmp_check_apicid_present(int bit) 442a05180fSIngo Molnar { 452a05180fSIngo Molnar return 1; 462a05180fSIngo Molnar } 472a05180fSIngo Molnar 4812bf24a4STejun Heo static int bigsmp_early_logical_apicid(int cpu) 4912bf24a4STejun Heo { 5012bf24a4STejun Heo /* on bigsmp, logical apicid is the same as physical */ 5112bf24a4STejun Heo return early_per_cpu(x86_cpu_to_apicid, cpu); 5212bf24a4STejun Heo } 5312bf24a4STejun Heo 542a05180fSIngo Molnar static inline unsigned long calculate_ldr(int cpu) 552a05180fSIngo Molnar { 562a05180fSIngo Molnar unsigned long val, id; 572a05180fSIngo Molnar 582a05180fSIngo Molnar val = apic_read(APIC_LDR) & ~APIC_LDR_MASK; 592a05180fSIngo Molnar id = per_cpu(x86_bios_cpu_apicid, cpu); 602a05180fSIngo Molnar val |= SET_APIC_LOGICAL_ID(id); 612a05180fSIngo Molnar 622a05180fSIngo Molnar return val; 632a05180fSIngo Molnar } 642a05180fSIngo Molnar 652a05180fSIngo Molnar /* 662a05180fSIngo Molnar * Set up the logical destination ID. 672a05180fSIngo Molnar * 682a05180fSIngo Molnar * Intel recommends to set DFR, LDR and TPR before enabling 692a05180fSIngo Molnar * an APIC. See e.g. "AP-388 82489DX User's Manual" (Intel 702a05180fSIngo Molnar * document number 292116). So here it goes... 712a05180fSIngo Molnar */ 729694cd6cSJiri Slaby static void bigsmp_init_apic_ldr(void) 732a05180fSIngo Molnar { 742a05180fSIngo Molnar unsigned long val; 752a05180fSIngo Molnar int cpu = smp_processor_id(); 762a05180fSIngo Molnar 772a05180fSIngo Molnar apic_write(APIC_DFR, APIC_DFR_FLAT); 782a05180fSIngo Molnar val = calculate_ldr(cpu); 792a05180fSIngo Molnar apic_write(APIC_LDR, val); 802a05180fSIngo Molnar } 812a05180fSIngo Molnar 829694cd6cSJiri Slaby static void bigsmp_setup_apic_routing(void) 832a05180fSIngo Molnar { 842a05180fSIngo Molnar printk(KERN_INFO 852a05180fSIngo Molnar "Enabling APIC mode: Physflat. Using %d I/O APICs\n", 862a05180fSIngo Molnar nr_ioapics); 872a05180fSIngo Molnar } 882a05180fSIngo Molnar 899694cd6cSJiri Slaby static int bigsmp_cpu_present_to_apicid(int mps_cpu) 902a05180fSIngo Molnar { 912a05180fSIngo Molnar if (mps_cpu < nr_cpu_ids) 922a05180fSIngo Molnar return (int) per_cpu(x86_bios_cpu_apicid, mps_cpu); 932a05180fSIngo Molnar 942a05180fSIngo Molnar return BAD_APICID; 952a05180fSIngo Molnar } 962a05180fSIngo Molnar 977abc0753SCyrill Gorcunov static void bigsmp_ioapic_phys_id_map(physid_mask_t *phys_map, physid_mask_t *retmap) 982a05180fSIngo Molnar { 992a05180fSIngo Molnar /* For clustered we don't have a good way to do this yet - hack */ 1007abc0753SCyrill Gorcunov physids_promote(0xFFL, retmap); 1012a05180fSIngo Molnar } 1022a05180fSIngo Molnar 103e11dadabSThomas Gleixner static int bigsmp_check_phys_apicid_present(int phys_apicid) 1042a05180fSIngo Molnar { 1052a05180fSIngo Molnar return 1; 1062a05180fSIngo Molnar } 1072a05180fSIngo Molnar 1082a05180fSIngo Molnar /* As we are using single CPU as destination, pick only one CPU here */ 1094f062896SRusty Russell static unsigned int bigsmp_cpu_mask_to_apicid(const struct cpumask *cpumask) 1102a05180fSIngo Molnar { 1117632611fSTejun Heo int cpu = cpumask_first(cpumask); 1127632611fSTejun Heo 1137632611fSTejun Heo if (cpu < nr_cpu_ids) 1147632611fSTejun Heo return cpu_physical_id(cpu); 1157632611fSTejun Heo return BAD_APICID; 1162a05180fSIngo Molnar } 1172a05180fSIngo Molnar 1189694cd6cSJiri Slaby static unsigned int bigsmp_cpu_mask_to_apicid_and(const struct cpumask *cpumask, 1192a05180fSIngo Molnar const struct cpumask *andmask) 1202a05180fSIngo Molnar { 1212a05180fSIngo Molnar int cpu; 1222a05180fSIngo Molnar 1232a05180fSIngo Molnar /* 1242a05180fSIngo Molnar * We're using fixed IRQ delivery, can only return one phys APIC ID. 1252a05180fSIngo Molnar * May as well be the first. 1262a05180fSIngo Molnar */ 1272a05180fSIngo Molnar for_each_cpu_and(cpu, cpumask, andmask) { 1282a05180fSIngo Molnar if (cpumask_test_cpu(cpu, cpu_online_mask)) 1297632611fSTejun Heo return cpu_physical_id(cpu); 1302a05180fSIngo Molnar } 1317632611fSTejun Heo return BAD_APICID; 1322a05180fSIngo Molnar } 1332a05180fSIngo Molnar 1349694cd6cSJiri Slaby static int bigsmp_phys_pkg_id(int cpuid_apic, int index_msb) 1352a05180fSIngo Molnar { 1362a05180fSIngo Molnar return cpuid_apic >> index_msb; 1372a05180fSIngo Molnar } 1382a05180fSIngo Molnar 1392a05180fSIngo Molnar static inline void bigsmp_send_IPI_mask(const struct cpumask *mask, int vector) 1402a05180fSIngo Molnar { 1412a05180fSIngo Molnar default_send_IPI_mask_sequence_phys(mask, vector); 1422a05180fSIngo Molnar } 1432a05180fSIngo Molnar 1449694cd6cSJiri Slaby static void bigsmp_send_IPI_allbutself(int vector) 1452a05180fSIngo Molnar { 1462a05180fSIngo Molnar default_send_IPI_mask_allbutself_phys(cpu_online_mask, vector); 1472a05180fSIngo Molnar } 1482a05180fSIngo Molnar 1499694cd6cSJiri Slaby static void bigsmp_send_IPI_all(int vector) 1502a05180fSIngo Molnar { 1512a05180fSIngo Molnar bigsmp_send_IPI_mask(cpu_online_mask, vector); 1522a05180fSIngo Molnar } 1532a05180fSIngo Molnar 1542a05180fSIngo Molnar static int dmi_bigsmp; /* can be set by dmi scanners */ 1552a05180fSIngo Molnar 1562a05180fSIngo Molnar static int hp_ht_bigsmp(const struct dmi_system_id *d) 1572a05180fSIngo Molnar { 1582a05180fSIngo Molnar printk(KERN_NOTICE "%s detected: force use of apic=bigsmp\n", d->ident); 1592a05180fSIngo Molnar dmi_bigsmp = 1; 1602a05180fSIngo Molnar 1612a05180fSIngo Molnar return 0; 1622a05180fSIngo Molnar } 1632a05180fSIngo Molnar 1642a05180fSIngo Molnar 1652a05180fSIngo Molnar static const struct dmi_system_id bigsmp_dmi_table[] = { 1662a05180fSIngo Molnar { hp_ht_bigsmp, "HP ProLiant DL760 G2", 1672a05180fSIngo Molnar { DMI_MATCH(DMI_BIOS_VENDOR, "HP"), 1682a05180fSIngo Molnar DMI_MATCH(DMI_BIOS_VERSION, "P44-"), 1692a05180fSIngo Molnar } 1702a05180fSIngo Molnar }, 1712a05180fSIngo Molnar 1722a05180fSIngo Molnar { hp_ht_bigsmp, "HP ProLiant DL740", 1732a05180fSIngo Molnar { DMI_MATCH(DMI_BIOS_VENDOR, "HP"), 1742a05180fSIngo Molnar DMI_MATCH(DMI_BIOS_VERSION, "P47-"), 1752a05180fSIngo Molnar } 1762a05180fSIngo Molnar }, 1772a05180fSIngo Molnar { } /* NULL entry stops DMI scanning */ 1782a05180fSIngo Molnar }; 1792a05180fSIngo Molnar 1804f062896SRusty Russell static void bigsmp_vector_allocation_domain(int cpu, struct cpumask *retmask) 1812a05180fSIngo Molnar { 1824f062896SRusty Russell cpumask_clear(retmask); 1834f062896SRusty Russell cpumask_set_cpu(cpu, retmask); 1842a05180fSIngo Molnar } 1852a05180fSIngo Molnar 1862a05180fSIngo Molnar static int probe_bigsmp(void) 1872a05180fSIngo Molnar { 1882a05180fSIngo Molnar if (def_to_bigsmp) 1892a05180fSIngo Molnar dmi_bigsmp = 1; 1902a05180fSIngo Molnar else 1912a05180fSIngo Molnar dmi_check_system(bigsmp_dmi_table); 1922a05180fSIngo Molnar 1932a05180fSIngo Molnar return dmi_bigsmp; 1942a05180fSIngo Molnar } 1952a05180fSIngo Molnar 1962a05180fSIngo Molnar struct apic apic_bigsmp = { 1972a05180fSIngo Molnar 1982a05180fSIngo Molnar .name = "bigsmp", 1992a05180fSIngo Molnar .probe = probe_bigsmp, 2002a05180fSIngo Molnar .acpi_madt_oem_check = NULL, 2012a05180fSIngo Molnar .apic_id_registered = bigsmp_apic_id_registered, 2022a05180fSIngo Molnar 2032a05180fSIngo Molnar .irq_delivery_mode = dest_Fixed, 2042a05180fSIngo Molnar /* phys delivery to target CPU: */ 2052a05180fSIngo Molnar .irq_dest_mode = 0, 2062a05180fSIngo Molnar 2072a05180fSIngo Molnar .target_cpus = bigsmp_target_cpus, 2082a05180fSIngo Molnar .disable_esr = 1, 2092a05180fSIngo Molnar .dest_logical = 0, 2102a05180fSIngo Molnar .check_apicid_used = bigsmp_check_apicid_used, 2112a05180fSIngo Molnar .check_apicid_present = bigsmp_check_apicid_present, 2122a05180fSIngo Molnar 2132a05180fSIngo Molnar .vector_allocation_domain = bigsmp_vector_allocation_domain, 2142a05180fSIngo Molnar .init_apic_ldr = bigsmp_init_apic_ldr, 2152a05180fSIngo Molnar 2162a05180fSIngo Molnar .ioapic_phys_id_map = bigsmp_ioapic_phys_id_map, 2172a05180fSIngo Molnar .setup_apic_routing = bigsmp_setup_apic_routing, 2182a05180fSIngo Molnar .multi_timer_check = NULL, 2192a05180fSIngo Molnar .cpu_present_to_apicid = bigsmp_cpu_present_to_apicid, 2207abc0753SCyrill Gorcunov .apicid_to_cpu_present = physid_set_mask_of_physid, 2212a05180fSIngo Molnar .setup_portio_remap = NULL, 2222a05180fSIngo Molnar .check_phys_apicid_present = bigsmp_check_phys_apicid_present, 2232a05180fSIngo Molnar .enable_apic_mode = NULL, 2242a05180fSIngo Molnar .phys_pkg_id = bigsmp_phys_pkg_id, 2252a05180fSIngo Molnar .mps_oem_check = NULL, 2262a05180fSIngo Molnar 2272a05180fSIngo Molnar .get_apic_id = bigsmp_get_apic_id, 2282a05180fSIngo Molnar .set_apic_id = NULL, 2292a05180fSIngo Molnar .apic_id_mask = 0xFF << 24, 2302a05180fSIngo Molnar 2312a05180fSIngo Molnar .cpu_mask_to_apicid = bigsmp_cpu_mask_to_apicid, 2322a05180fSIngo Molnar .cpu_mask_to_apicid_and = bigsmp_cpu_mask_to_apicid_and, 2332a05180fSIngo Molnar 2342a05180fSIngo Molnar .send_IPI_mask = bigsmp_send_IPI_mask, 2352a05180fSIngo Molnar .send_IPI_mask_allbutself = NULL, 2362a05180fSIngo Molnar .send_IPI_allbutself = bigsmp_send_IPI_allbutself, 2372a05180fSIngo Molnar .send_IPI_all = bigsmp_send_IPI_all, 2382a05180fSIngo Molnar .send_IPI_self = default_send_IPI_self, 2392a05180fSIngo Molnar 2402a05180fSIngo Molnar .trampoline_phys_low = DEFAULT_TRAMPOLINE_PHYS_LOW, 2412a05180fSIngo Molnar .trampoline_phys_high = DEFAULT_TRAMPOLINE_PHYS_HIGH, 2422a05180fSIngo Molnar 2432a05180fSIngo Molnar .wait_for_init_deassert = default_wait_for_init_deassert, 2442a05180fSIngo Molnar 2452a05180fSIngo Molnar .smp_callin_clear_local_apic = NULL, 2462a05180fSIngo Molnar .inquire_remote_apic = default_inquire_remote_apic, 2472a05180fSIngo Molnar 2482a05180fSIngo Molnar .read = native_apic_mem_read, 2492a05180fSIngo Molnar .write = native_apic_mem_write, 2502a05180fSIngo Molnar .icr_read = native_apic_icr_read, 2512a05180fSIngo Molnar .icr_write = native_apic_icr_write, 2522a05180fSIngo Molnar .wait_icr_idle = native_apic_wait_icr_idle, 2532a05180fSIngo Molnar .safe_wait_icr_idle = native_safe_apic_wait_icr_idle, 254acb8bc09STejun Heo 25512bf24a4STejun Heo .x86_32_early_logical_apicid = bigsmp_early_logical_apicid, 2562a05180fSIngo Molnar }; 257107e0e0cSSuresh Siddha 25869c252ffSSuresh Siddha struct apic * __init generic_bigsmp_probe(void) 25969c252ffSSuresh Siddha { 26069c252ffSSuresh Siddha if (probe_bigsmp()) 26169c252ffSSuresh Siddha return &apic_bigsmp; 26269c252ffSSuresh Siddha 26369c252ffSSuresh Siddha return NULL; 26469c252ffSSuresh Siddha } 26569c252ffSSuresh Siddha 266107e0e0cSSuresh Siddha apic_driver(apic_bigsmp); 267