1fec754d4SMike Smith /*- 298aa9cd0SNate Lawson * Copyright (c) 2003-2005 Nate Lawson (SDG) 3fec754d4SMike Smith * Copyright (c) 2001 Michael Smith 4fec754d4SMike Smith * All rights reserved. 5fec754d4SMike Smith * 6fec754d4SMike Smith * Redistribution and use in source and binary forms, with or without 7fec754d4SMike Smith * modification, are permitted provided that the following conditions 8fec754d4SMike Smith * are met: 9fec754d4SMike Smith * 1. Redistributions of source code must retain the above copyright 10fec754d4SMike Smith * notice, this list of conditions and the following disclaimer. 11fec754d4SMike Smith * 2. Redistributions in binary form must reproduce the above copyright 12fec754d4SMike Smith * notice, this list of conditions and the following disclaimer in the 13fec754d4SMike Smith * documentation and/or other materials provided with the distribution. 14fec754d4SMike Smith * 15fec754d4SMike Smith * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16fec754d4SMike Smith * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17fec754d4SMike Smith * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18fec754d4SMike Smith * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19fec754d4SMike Smith * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20fec754d4SMike Smith * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21fec754d4SMike Smith * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22fec754d4SMike Smith * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23fec754d4SMike Smith * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24fec754d4SMike Smith * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25fec754d4SMike Smith * SUCH DAMAGE. 26fec754d4SMike Smith */ 27fec754d4SMike Smith 28aad970f1SDavid E. O'Brien #include <sys/cdefs.h> 29aad970f1SDavid E. O'Brien __FBSDID("$FreeBSD$"); 30aad970f1SDavid E. O'Brien 31fec754d4SMike Smith #include "opt_acpi.h" 32fec754d4SMike Smith #include <sys/param.h> 33fec754d4SMike Smith #include <sys/bus.h> 3498aa9cd0SNate Lawson #include <sys/cpu.h> 3556a70eadSNate Lawson #include <sys/kernel.h> 36447a5fa1SJohn Baldwin #include <sys/malloc.h> 37fe12f24bSPoul-Henning Kamp #include <sys/module.h> 386b74f9b7SNate Lawson #include <sys/pcpu.h> 3956a70eadSNate Lawson #include <sys/power.h> 4056a70eadSNate Lawson #include <sys/proc.h> 41f51d43feSAndriy Gapon #include <sys/sched.h> 4256a70eadSNate Lawson #include <sys/sbuf.h> 436b74f9b7SNate Lawson #include <sys/smp.h> 44fec754d4SMike Smith 456b74f9b7SNate Lawson #include <dev/pci/pcivar.h> 4656a70eadSNate Lawson #include <machine/atomic.h> 47fec754d4SMike Smith #include <machine/bus.h> 48e1c9d39eSJung-uk Kim #if defined(__amd64__) || defined(__i386__) 49e1c9d39eSJung-uk Kim #include <machine/clock.h> 50b57a73f8SKonstantin Belousov #include <machine/specialreg.h> 51b57a73f8SKonstantin Belousov #include <machine/md_var.h> 52e1c9d39eSJung-uk Kim #endif 5356a70eadSNate Lawson #include <sys/rman.h> 54fec754d4SMike Smith 55129d3046SJung-uk Kim #include <contrib/dev/acpica/include/acpi.h> 56129d3046SJung-uk Kim #include <contrib/dev/acpica/include/accommon.h> 57129d3046SJung-uk Kim 58fec754d4SMike Smith #include <dev/acpica/acpivar.h> 59fec754d4SMike Smith 60fec754d4SMike Smith /* 618c5468e3SNate Lawson * Support for ACPI Processor devices, including C[1-3] sleep states. 62fec754d4SMike Smith */ 63fec754d4SMike Smith 64be2b1797SNate Lawson /* Hooks for the ACPI CA debugging infrastructure */ 65fec754d4SMike Smith #define _COMPONENT ACPI_PROCESSOR 669127281cSMike Smith ACPI_MODULE_NAME("PROCESSOR") 67fec754d4SMike Smith 686b74f9b7SNate Lawson struct acpi_cx { 696b74f9b7SNate Lawson struct resource *p_lvlx; /* Register to read to enter state. */ 706b74f9b7SNate Lawson uint32_t type; /* C1-3 (C4 and up treated as C3). */ 716b74f9b7SNate Lawson uint32_t trans_lat; /* Transition latency (usec). */ 726b74f9b7SNate Lawson uint32_t power; /* Power consumed (mW). */ 73f4eb0418SNate Lawson int res_type; /* Resource type for p_lvlx. */ 74f51d43feSAndriy Gapon int res_rid; /* Resource ID for p_lvlx. */ 75b57a73f8SKonstantin Belousov bool do_mwait; 76b57a73f8SKonstantin Belousov uint32_t mwait_hint; 77b57a73f8SKonstantin Belousov bool mwait_hw_coord; 78b57a73f8SKonstantin Belousov bool mwait_bm_avoidance; 796b74f9b7SNate Lawson }; 806b74f9b7SNate Lawson #define MAX_CX_STATES 8 816b74f9b7SNate Lawson 82fec754d4SMike Smith struct acpi_cpu_softc { 83fec754d4SMike Smith device_t cpu_dev; 84fec754d4SMike Smith ACPI_HANDLE cpu_handle; 8598aa9cd0SNate Lawson struct pcpu *cpu_pcpu; 8698aa9cd0SNate Lawson uint32_t cpu_acpi_id; /* ACPI processor id */ 8756a70eadSNate Lawson uint32_t cpu_p_blk; /* ACPI P_BLK location */ 8856a70eadSNate Lawson uint32_t cpu_p_blk_len; /* P_BLK length (must be 6). */ 896b74f9b7SNate Lawson struct acpi_cx cpu_cx_states[MAX_CX_STATES]; 9056a70eadSNate Lawson int cpu_cx_count; /* Number of valid Cx states. */ 91a2afe45aSNate Lawson int cpu_prev_sleep;/* Last idle sleep duration. */ 92b29224c2SNate Lawson int cpu_features; /* Child driver supported features. */ 93907b6777SNate Lawson /* Runtime state. */ 9492597e06SJohn Baldwin int cpu_non_c2; /* Index of lowest non-C2 state. */ 95907b6777SNate Lawson int cpu_non_c3; /* Index of lowest non-C3 state. */ 96907b6777SNate Lawson u_int cpu_cx_stats[MAX_CX_STATES];/* Cx usage history. */ 97907b6777SNate Lawson /* Values for sysctl. */ 98907b6777SNate Lawson struct sysctl_ctx_list cpu_sysctl_ctx; 99907b6777SNate Lawson struct sysctl_oid *cpu_sysctl_tree; 10055fb7f36SSean Bruno int cpu_cx_lowest; 101d30b88afSAndriy Gapon int cpu_cx_lowest_lim; 10209424d43SAndriy Gapon int cpu_disable_idle; /* Disable entry to idle function */ 103907b6777SNate Lawson char cpu_cx_supported[64]; 104fec754d4SMike Smith }; 105fec754d4SMike Smith 10698aa9cd0SNate Lawson struct acpi_cpu_device { 10798aa9cd0SNate Lawson struct resource_list ad_rl; 10898aa9cd0SNate Lawson }; 10998aa9cd0SNate Lawson 1106b74f9b7SNate Lawson #define CPU_GET_REG(reg, width) \ 1116b74f9b7SNate Lawson (bus_space_read_ ## width(rman_get_bustag((reg)), \ 1126b74f9b7SNate Lawson rman_get_bushandle((reg)), 0)) 1136b74f9b7SNate Lawson #define CPU_SET_REG(reg, width, val) \ 1146b74f9b7SNate Lawson (bus_space_write_ ## width(rman_get_bustag((reg)), \ 1156b74f9b7SNate Lawson rman_get_bushandle((reg)), 0, (val))) 116be2b1797SNate Lawson 1178b888c66SNate Lawson #define ACPI_NOTIFY_CX_STATES 0x81 /* _CST changed. */ 118fec754d4SMike Smith 11918ececa0SNate Lawson #define CPU_QUIRK_NO_C3 (1<<0) /* C3-type states are not usable. */ 12018ececa0SNate Lawson #define CPU_QUIRK_NO_BM_CTRL (1<<2) /* No bus mastering control. */ 1216b74f9b7SNate Lawson 1226b74f9b7SNate Lawson #define PCI_VENDOR_INTEL 0x8086 1236b74f9b7SNate Lawson #define PCI_DEVICE_82371AB_3 0x7113 /* PIIX4 chipset for quirks. */ 1246b74f9b7SNate Lawson #define PCI_REVISION_A_STEP 0 1256b74f9b7SNate Lawson #define PCI_REVISION_B_STEP 1 1266b74f9b7SNate Lawson #define PCI_REVISION_4E 2 1276b74f9b7SNate Lawson #define PCI_REVISION_4M 3 1288a000acaSRui Paulo #define PIIX4_DEVACTB_REG 0x58 1298a000acaSRui Paulo #define PIIX4_BRLD_EN_IRQ0 (1<<0) 1308a000acaSRui Paulo #define PIIX4_BRLD_EN_IRQ (1<<1) 1318a000acaSRui Paulo #define PIIX4_BRLD_EN_IRQ8 (1<<5) 1328a000acaSRui Paulo #define PIIX4_STOP_BREAK_MASK (PIIX4_BRLD_EN_IRQ0 | PIIX4_BRLD_EN_IRQ | PIIX4_BRLD_EN_IRQ8) 1338a000acaSRui Paulo #define PIIX4_PCNTRL_BST_EN (1<<10) 1346b74f9b7SNate Lawson 135b57a73f8SKonstantin Belousov #define CST_FFH_VENDOR_INTEL 1 136b57a73f8SKonstantin Belousov #define CST_FFH_INTEL_CL_C1IO 1 137b57a73f8SKonstantin Belousov #define CST_FFH_INTEL_CL_MWAIT 2 138b57a73f8SKonstantin Belousov #define CST_FFH_MWAIT_HW_COORD 0x0001 139b57a73f8SKonstantin Belousov #define CST_FFH_MWAIT_BM_AVOID 0x0002 140b57a73f8SKonstantin Belousov 141e054cac7SConrad Meyer #define CPUDEV_DEVICE_ID "ACPI0007" 142e054cac7SConrad Meyer 143c2641d23SRoger Pau Monné /* Knob to disable acpi_cpu devices */ 144c2641d23SRoger Pau Monné bool acpi_cpu_disabled = false; 145c2641d23SRoger Pau Monné 1466b74f9b7SNate Lawson /* Platform hardware resource information. */ 1476b74f9b7SNate Lawson static uint32_t cpu_smi_cmd; /* Value to write to SMI_CMD. */ 14856a70eadSNate Lawson static uint8_t cpu_cst_cnt; /* Indicate we are _CST aware. */ 149a2afe45aSNate Lawson static int cpu_quirks; /* Indicate any hardware bugs. */ 1506b74f9b7SNate Lawson 1516b74f9b7SNate Lawson /* Values for sysctl. */ 152907b6777SNate Lawson static struct sysctl_ctx_list cpu_sysctl_ctx; 153907b6777SNate Lawson static struct sysctl_oid *cpu_sysctl_tree; 154907b6777SNate Lawson static int cpu_cx_generic; 155d30b88afSAndriy Gapon static int cpu_cx_lowest_lim; 156fec754d4SMike Smith 157fec754d4SMike Smith static device_t *cpu_devices; 158fec754d4SMike Smith static int cpu_ndevices; 159447a5fa1SJohn Baldwin static struct acpi_cpu_softc **cpu_softc; 160d92a2ebdSNate Lawson ACPI_SERIAL_DECL(cpu, "ACPI CPU"); 161fec754d4SMike Smith 162fec754d4SMike Smith static int acpi_cpu_probe(device_t dev); 163fec754d4SMike Smith static int acpi_cpu_attach(device_t dev); 1643331373cSNate Lawson static int acpi_cpu_suspend(device_t dev); 1653331373cSNate Lawson static int acpi_cpu_resume(device_t dev); 166c8077ccdSAlexander Motin static int acpi_pcpu_get_id(device_t dev, uint32_t acpi_id, 167c8077ccdSAlexander Motin u_int *cpu_id); 16898aa9cd0SNate Lawson static struct resource_list *acpi_cpu_get_rlist(device_t dev, device_t child); 1693d844eddSAndriy Gapon static device_t acpi_cpu_add_child(device_t dev, u_int order, const char *name, 17098aa9cd0SNate Lawson int unit); 17198aa9cd0SNate Lawson static int acpi_cpu_read_ivar(device_t dev, device_t child, int index, 17298aa9cd0SNate Lawson uintptr_t *result); 17356a70eadSNate Lawson static int acpi_cpu_shutdown(device_t dev); 174907b6777SNate Lawson static void acpi_cpu_cx_probe(struct acpi_cpu_softc *sc); 175907b6777SNate Lawson static void acpi_cpu_generic_cx_probe(struct acpi_cpu_softc *sc); 1766b74f9b7SNate Lawson static int acpi_cpu_cx_cst(struct acpi_cpu_softc *sc); 1776b74f9b7SNate Lawson static void acpi_cpu_startup(void *arg); 178907b6777SNate Lawson static void acpi_cpu_startup_cx(struct acpi_cpu_softc *sc); 17989ab2a7aSRui Paulo static void acpi_cpu_cx_list(struct acpi_cpu_softc *sc); 180617994efSAndrew Turner #if defined(__i386__) || defined(__amd64__) 181acccf7d8SDavide Italiano static void acpi_cpu_idle(sbintime_t sbt); 182617994efSAndrew Turner #endif 1836b74f9b7SNate Lawson static void acpi_cpu_notify(ACPI_HANDLE h, UINT32 notify, void *context); 1849cf4cabeSJung-uk Kim static void acpi_cpu_quirks(void); 1859cf4cabeSJung-uk Kim static void acpi_cpu_quirks_piix4(void); 186a2afe45aSNate Lawson static int acpi_cpu_usage_sysctl(SYSCTL_HANDLER_ARGS); 1870d470054SAdrian Chadd static int acpi_cpu_usage_counters_sysctl(SYSCTL_HANDLER_ARGS); 188d30b88afSAndriy Gapon static int acpi_cpu_set_cx_lowest(struct acpi_cpu_softc *sc); 1896b74f9b7SNate Lawson static int acpi_cpu_cx_lowest_sysctl(SYSCTL_HANDLER_ARGS); 190907b6777SNate Lawson static int acpi_cpu_global_cx_lowest_sysctl(SYSCTL_HANDLER_ARGS); 191b57a73f8SKonstantin Belousov #if defined(__i386__) || defined(__amd64__) 192b57a73f8SKonstantin Belousov static int acpi_cpu_method_sysctl(SYSCTL_HANDLER_ARGS); 193b57a73f8SKonstantin Belousov #endif 194fec754d4SMike Smith 195fec754d4SMike Smith static device_method_t acpi_cpu_methods[] = { 196fec754d4SMike Smith /* Device interface */ 197fec754d4SMike Smith DEVMETHOD(device_probe, acpi_cpu_probe), 198fec754d4SMike Smith DEVMETHOD(device_attach, acpi_cpu_attach), 19998aa9cd0SNate Lawson DEVMETHOD(device_detach, bus_generic_detach), 20056a70eadSNate Lawson DEVMETHOD(device_shutdown, acpi_cpu_shutdown), 2013331373cSNate Lawson DEVMETHOD(device_suspend, acpi_cpu_suspend), 2023331373cSNate Lawson DEVMETHOD(device_resume, acpi_cpu_resume), 20398aa9cd0SNate Lawson 20498aa9cd0SNate Lawson /* Bus interface */ 20598aa9cd0SNate Lawson DEVMETHOD(bus_add_child, acpi_cpu_add_child), 20698aa9cd0SNate Lawson DEVMETHOD(bus_read_ivar, acpi_cpu_read_ivar), 20798aa9cd0SNate Lawson DEVMETHOD(bus_get_resource_list, acpi_cpu_get_rlist), 20898aa9cd0SNate Lawson DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource), 20998aa9cd0SNate Lawson DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource), 21098aa9cd0SNate Lawson DEVMETHOD(bus_alloc_resource, bus_generic_rl_alloc_resource), 21198aa9cd0SNate Lawson DEVMETHOD(bus_release_resource, bus_generic_rl_release_resource), 21298aa9cd0SNate Lawson DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 21398aa9cd0SNate Lawson DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 21498aa9cd0SNate Lawson DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 21598aa9cd0SNate Lawson DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 216fec754d4SMike Smith 2174b7ec270SMarius Strobl DEVMETHOD_END 218fec754d4SMike Smith }; 219fec754d4SMike Smith 220fec754d4SMike Smith static driver_t acpi_cpu_driver = { 221b0e2b625SNate Lawson "cpu", 222fec754d4SMike Smith acpi_cpu_methods, 223fec754d4SMike Smith sizeof(struct acpi_cpu_softc), 224fec754d4SMike Smith }; 225fec754d4SMike Smith 2263045c8afSNate Lawson static devclass_t acpi_cpu_devclass; 2273045c8afSNate Lawson DRIVER_MODULE(cpu, acpi, acpi_cpu_driver, acpi_cpu_devclass, 0, 0); 228b0e2b625SNate Lawson MODULE_DEPEND(cpu, acpi, 1, 1, 1); 22956a70eadSNate Lawson 230fec754d4SMike Smith static int 231fec754d4SMike Smith acpi_cpu_probe(device_t dev) 232fec754d4SMike Smith { 233e054cac7SConrad Meyer static char *cpudev_ids[] = { CPUDEV_DEVICE_ID, NULL }; 234b29224c2SNate Lawson int acpi_id, cpu_id; 235b0e2b625SNate Lawson ACPI_BUFFER buf; 236b0e2b625SNate Lawson ACPI_HANDLE handle; 237b0e2b625SNate Lawson ACPI_OBJECT *obj; 238b0e2b625SNate Lawson ACPI_STATUS status; 239e054cac7SConrad Meyer ACPI_OBJECT_TYPE type; 240b0e2b625SNate Lawson 241e054cac7SConrad Meyer if (acpi_disabled("cpu") || acpi_cpu_disabled) 242e054cac7SConrad Meyer return (ENXIO); 243e054cac7SConrad Meyer type = acpi_get_type(dev); 244e054cac7SConrad Meyer if (type != ACPI_TYPE_PROCESSOR && type != ACPI_TYPE_DEVICE) 245e054cac7SConrad Meyer return (ENXIO); 246e054cac7SConrad Meyer if (type == ACPI_TYPE_DEVICE && 2475efca36fSTakanori Watanabe ACPI_ID_PROBE(device_get_parent(dev), dev, cpudev_ids, NULL) >= 0) 248b0e2b625SNate Lawson return (ENXIO); 249b0e2b625SNate Lawson 250b0e2b625SNate Lawson handle = acpi_get_handle(dev); 251447a5fa1SJohn Baldwin if (cpu_softc == NULL) 252447a5fa1SJohn Baldwin cpu_softc = malloc(sizeof(struct acpi_cpu_softc *) * 253447a5fa1SJohn Baldwin (mp_maxid + 1), M_TEMP /* XXX */, M_WAITOK | M_ZERO); 254b0e2b625SNate Lawson 255e054cac7SConrad Meyer if (type == ACPI_TYPE_PROCESSOR) { 256b0e2b625SNate Lawson /* Get our Processor object. */ 257b0e2b625SNate Lawson buf.Pointer = NULL; 258b0e2b625SNate Lawson buf.Length = ACPI_ALLOCATE_BUFFER; 259b0e2b625SNate Lawson status = AcpiEvaluateObject(handle, NULL, NULL, &buf); 260b0e2b625SNate Lawson if (ACPI_FAILURE(status)) { 261b0e2b625SNate Lawson device_printf(dev, "probe failed to get Processor obj - %s\n", 262b0e2b625SNate Lawson AcpiFormatException(status)); 263b0e2b625SNate Lawson return (ENXIO); 264b0e2b625SNate Lawson } 265b0e2b625SNate Lawson obj = (ACPI_OBJECT *)buf.Pointer; 266b0e2b625SNate Lawson if (obj->Type != ACPI_TYPE_PROCESSOR) { 267e054cac7SConrad Meyer device_printf(dev, "Processor object has bad type %d\n", 268e054cac7SConrad Meyer obj->Type); 269b0e2b625SNate Lawson AcpiOsFree(obj); 270b0e2b625SNate Lawson return (ENXIO); 271fec754d4SMike Smith } 272be2b1797SNate Lawson 273b0e2b625SNate Lawson /* 274b0e2b625SNate Lawson * Find the processor associated with our unit. We could use the 275b0e2b625SNate Lawson * ProcId as a key, however, some boxes do not have the same values 276b0e2b625SNate Lawson * in their Processor object as the ProcId values in the MADT. 277b0e2b625SNate Lawson */ 278b0e2b625SNate Lawson acpi_id = obj->Processor.ProcId; 279b0e2b625SNate Lawson AcpiOsFree(obj); 280e054cac7SConrad Meyer } else { 281e054cac7SConrad Meyer status = acpi_GetInteger(handle, "_UID", &acpi_id); 282e054cac7SConrad Meyer if (ACPI_FAILURE(status)) { 283e054cac7SConrad Meyer device_printf(dev, "Device object has bad value - %s\n", 284e054cac7SConrad Meyer AcpiFormatException(status)); 285e054cac7SConrad Meyer return (ENXIO); 286e054cac7SConrad Meyer } 287e054cac7SConrad Meyer } 288c8077ccdSAlexander Motin if (acpi_pcpu_get_id(dev, acpi_id, &cpu_id) != 0) { 289c8077ccdSAlexander Motin if (bootverbose && (type != ACPI_TYPE_PROCESSOR || acpi_id != 255)) 290c8077ccdSAlexander Motin printf("ACPI: Processor %s (ACPI ID %u) ignored\n", 291c8077ccdSAlexander Motin acpi_name(acpi_get_handle(dev)), acpi_id); 292c8077ccdSAlexander Motin return (ENXIO); 293c8077ccdSAlexander Motin } 294c8077ccdSAlexander Motin 295c8077ccdSAlexander Motin if (device_set_unit(dev, cpu_id) != 0) 296fec754d4SMike Smith return (ENXIO); 297b0e2b625SNate Lawson 298b29224c2SNate Lawson device_set_desc(dev, "ACPI CPU"); 299b0e2b625SNate Lawson 30043d9cb5bSWarner Losh if (!bootverbose && device_get_unit(dev) != 0) { 30143d9cb5bSWarner Losh device_quiet(dev); 30243d9cb5bSWarner Losh device_quiet_children(dev); 30343d9cb5bSWarner Losh } 30443d9cb5bSWarner Losh 305b0e2b625SNate Lawson return (0); 306fec754d4SMike Smith } 307fec754d4SMike Smith 308fec754d4SMike Smith static int 309fec754d4SMike Smith acpi_cpu_attach(device_t dev) 310fec754d4SMike Smith { 311b0e2b625SNate Lawson ACPI_BUFFER buf; 31287f0a4bfSJung-uk Kim ACPI_OBJECT arg, *obj; 313bce92885SNate Lawson ACPI_OBJECT_LIST arglist; 31498aa9cd0SNate Lawson struct pcpu *pcpu_data; 315fec754d4SMike Smith struct acpi_cpu_softc *sc; 316fec754d4SMike Smith struct acpi_softc *acpi_sc; 317fec754d4SMike Smith ACPI_STATUS status; 318b29224c2SNate Lawson u_int features; 319b29224c2SNate Lawson int cpu_id, drv_count, i; 320b29224c2SNate Lawson driver_t **drivers; 321bce92885SNate Lawson uint32_t cap_set[3]; 322fec754d4SMike Smith 323c961facaSNate Lawson /* UUID needed by _OSC evaluation */ 324c961facaSNate Lawson static uint8_t cpu_oscuuid[16] = { 0x16, 0xA6, 0x77, 0x40, 0x0C, 0x29, 325c961facaSNate Lawson 0xBE, 0x47, 0x9E, 0xBD, 0xD8, 0x70, 326c961facaSNate Lawson 0x58, 0x71, 0x39, 0x53 }; 327c961facaSNate Lawson 328b4a05238SPeter Wemm ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 329fec754d4SMike Smith 330fec754d4SMike Smith sc = device_get_softc(dev); 331fec754d4SMike Smith sc->cpu_dev = dev; 332fec754d4SMike Smith sc->cpu_handle = acpi_get_handle(dev); 333c8077ccdSAlexander Motin cpu_id = device_get_unit(dev); 33498aa9cd0SNate Lawson cpu_softc[cpu_id] = sc; 33598aa9cd0SNate Lawson pcpu_data = pcpu_find(cpu_id); 33698aa9cd0SNate Lawson pcpu_data->pc_device = dev; 33798aa9cd0SNate Lawson sc->cpu_pcpu = pcpu_data; 3382be4e471SJung-uk Kim cpu_smi_cmd = AcpiGbl_FADT.SmiCommand; 3392be4e471SJung-uk Kim cpu_cst_cnt = AcpiGbl_FADT.CstControl; 340fec754d4SMike Smith 341e054cac7SConrad Meyer if (acpi_get_type(dev) == ACPI_TYPE_PROCESSOR) { 342b0e2b625SNate Lawson buf.Pointer = NULL; 343b0e2b625SNate Lawson buf.Length = ACPI_ALLOCATE_BUFFER; 3446b74f9b7SNate Lawson status = AcpiEvaluateObject(sc->cpu_handle, NULL, NULL, &buf); 3456b74f9b7SNate Lawson if (ACPI_FAILURE(status)) { 346b0e2b625SNate Lawson device_printf(dev, "attach failed to get Processor obj - %s\n", 3476b74f9b7SNate Lawson AcpiFormatException(status)); 3486b74f9b7SNate Lawson return (ENXIO); 349b0e2b625SNate Lawson } 350b0e2b625SNate Lawson obj = (ACPI_OBJECT *)buf.Pointer; 351b0e2b625SNate Lawson sc->cpu_p_blk = obj->Processor.PblkAddress; 352b0e2b625SNate Lawson sc->cpu_p_blk_len = obj->Processor.PblkLength; 35398aa9cd0SNate Lawson sc->cpu_acpi_id = obj->Processor.ProcId; 354b0e2b625SNate Lawson AcpiOsFree(obj); 355e054cac7SConrad Meyer } else { 356e054cac7SConrad Meyer KASSERT(acpi_get_type(dev) == ACPI_TYPE_DEVICE, 357e054cac7SConrad Meyer ("Unexpected ACPI object")); 358e054cac7SConrad Meyer status = acpi_GetInteger(sc->cpu_handle, "_UID", &sc->cpu_acpi_id); 359e054cac7SConrad Meyer if (ACPI_FAILURE(status)) { 360e054cac7SConrad Meyer device_printf(dev, "Device object has bad value - %s\n", 361e054cac7SConrad Meyer AcpiFormatException(status)); 362e054cac7SConrad Meyer return (ENXIO); 363e054cac7SConrad Meyer } 364e054cac7SConrad Meyer sc->cpu_p_blk = 0; 365e054cac7SConrad Meyer sc->cpu_p_blk_len = 0; 366e054cac7SConrad Meyer } 36756a70eadSNate Lawson ACPI_DEBUG_PRINT((ACPI_DB_INFO, "acpi_cpu%d: P_BLK at %#x/%d\n", 36856a70eadSNate Lawson device_get_unit(dev), sc->cpu_p_blk, sc->cpu_p_blk_len)); 3696b74f9b7SNate Lawson 370907b6777SNate Lawson /* 371907b6777SNate Lawson * If this is the first cpu we attach, create and initialize the generic 372907b6777SNate Lawson * resources that will be used by all acpi cpu devices. 373907b6777SNate Lawson */ 374907b6777SNate Lawson if (device_get_unit(dev) == 0) { 375907b6777SNate Lawson /* Assume we won't be using generic Cx mode by default */ 376907b6777SNate Lawson cpu_cx_generic = FALSE; 377907b6777SNate Lawson 378907b6777SNate Lawson /* Install hw.acpi.cpu sysctl tree */ 379fec754d4SMike Smith acpi_sc = acpi_device_get_parent_softc(dev); 380907b6777SNate Lawson sysctl_ctx_init(&cpu_sysctl_ctx); 381907b6777SNate Lawson cpu_sysctl_tree = SYSCTL_ADD_NODE(&cpu_sysctl_ctx, 38298aa9cd0SNate Lawson SYSCTL_CHILDREN(acpi_sc->acpi_sysctl_tree), OID_AUTO, "cpu", 3837029da5cSPawel Biernacki CTLFLAG_RD | CTLFLAG_MPSAFE, 0, "node for CPU children"); 384907b6777SNate Lawson } 385fec754d4SMike Smith 3866b74f9b7SNate Lawson /* 387b29224c2SNate Lawson * Before calling any CPU methods, collect child driver feature hints 388f2d94257SNate Lawson * and notify ACPI of them. We support unified SMP power control 389f2d94257SNate Lawson * so advertise this ourselves. Note this is not the same as independent 390f2d94257SNate Lawson * SMP control where each CPU can have different settings. 391b29224c2SNate Lawson */ 392b57a73f8SKonstantin Belousov sc->cpu_features = ACPI_CAP_SMP_SAME | ACPI_CAP_SMP_SAME_C3 | 393b57a73f8SKonstantin Belousov ACPI_CAP_C1_IO_HALT; 394b57a73f8SKonstantin Belousov 395b57a73f8SKonstantin Belousov #if defined(__i386__) || defined(__amd64__) 396b57a73f8SKonstantin Belousov /* 397b57a73f8SKonstantin Belousov * Ask for MWAIT modes if not disabled and interrupts work 398b57a73f8SKonstantin Belousov * reasonable with MWAIT. 399b57a73f8SKonstantin Belousov */ 400b57a73f8SKonstantin Belousov if (!acpi_disabled("mwait") && cpu_mwait_usable()) 401b57a73f8SKonstantin Belousov sc->cpu_features |= ACPI_CAP_SMP_C1_NATIVE | ACPI_CAP_SMP_C3_NATIVE; 402b57a73f8SKonstantin Belousov #endif 403b57a73f8SKonstantin Belousov 404b29224c2SNate Lawson if (devclass_get_drivers(acpi_cpu_devclass, &drivers, &drv_count) == 0) { 405b29224c2SNate Lawson for (i = 0; i < drv_count; i++) { 406b29224c2SNate Lawson if (ACPI_GET_FEATURES(drivers[i], &features) == 0) 407b29224c2SNate Lawson sc->cpu_features |= features; 408b29224c2SNate Lawson } 409b29224c2SNate Lawson free(drivers, M_TEMP); 410b29224c2SNate Lawson } 411bce92885SNate Lawson 412bce92885SNate Lawson /* 413f4ab0cccSAndriy Gapon * CPU capabilities are specified in 414f4ab0cccSAndriy Gapon * Intel Processor Vendor-Specific ACPI Interface Specification. 415bce92885SNate Lawson */ 416bce92885SNate Lawson if (sc->cpu_features) { 417877a6d99SAndriy Gapon cap_set[1] = sc->cpu_features; 4184c26ac69SJohn Baldwin status = acpi_EvaluateOSC(sc->cpu_handle, cpu_oscuuid, 1, 2, cap_set, 4194c26ac69SJohn Baldwin cap_set, false); 420f4ab0cccSAndriy Gapon if (ACPI_SUCCESS(status)) { 421f4ab0cccSAndriy Gapon if (cap_set[0] != 0) 422f4ab0cccSAndriy Gapon device_printf(dev, "_OSC returned status %#x\n", cap_set[0]); 423f4ab0cccSAndriy Gapon } 424f4ab0cccSAndriy Gapon else { 42587f0a4bfSJung-uk Kim arglist.Pointer = &arg; 426f4ab0cccSAndriy Gapon arglist.Count = 1; 42787f0a4bfSJung-uk Kim arg.Type = ACPI_TYPE_BUFFER; 42887f0a4bfSJung-uk Kim arg.Buffer.Length = sizeof(cap_set); 42987f0a4bfSJung-uk Kim arg.Buffer.Pointer = (uint8_t *)cap_set; 430f4ab0cccSAndriy Gapon cap_set[0] = 1; /* revision */ 431f4ab0cccSAndriy Gapon cap_set[1] = 1; /* number of capabilities integers */ 432f4ab0cccSAndriy Gapon cap_set[2] = sc->cpu_features; 433f4ab0cccSAndriy Gapon AcpiEvaluateObject(sc->cpu_handle, "_PDC", &arglist, NULL); 434f4ab0cccSAndriy Gapon } 435bce92885SNate Lawson } 436b29224c2SNate Lawson 437907b6777SNate Lawson /* Probe for Cx state support. */ 438907b6777SNate Lawson acpi_cpu_cx_probe(sc); 4396b74f9b7SNate Lawson 44098aa9cd0SNate Lawson return (0); 4416b74f9b7SNate Lawson } 4426b74f9b7SNate Lawson 443aa835160SAndriy Gapon static void 444aa835160SAndriy Gapon acpi_cpu_postattach(void *unused __unused) 445aa835160SAndriy Gapon { 446aa835160SAndriy Gapon device_t *devices; 447aa835160SAndriy Gapon int err; 448aa835160SAndriy Gapon int i, n; 449f8887b89SJohn Baldwin int attached; 450aa835160SAndriy Gapon 451aa835160SAndriy Gapon err = devclass_get_devices(acpi_cpu_devclass, &devices, &n); 452aa835160SAndriy Gapon if (err != 0) { 453aa835160SAndriy Gapon printf("devclass_get_devices(acpi_cpu_devclass) failed\n"); 454aa835160SAndriy Gapon return; 455aa835160SAndriy Gapon } 456f8887b89SJohn Baldwin attached = 0; 457f8887b89SJohn Baldwin for (i = 0; i < n; i++) 4588d07a66dSJohn Baldwin if (device_is_attached(devices[i]) && 4598d07a66dSJohn Baldwin device_get_driver(devices[i]) == &acpi_cpu_driver) 460f8887b89SJohn Baldwin attached = 1; 461aa835160SAndriy Gapon for (i = 0; i < n; i++) 462aa835160SAndriy Gapon bus_generic_probe(devices[i]); 463aa835160SAndriy Gapon for (i = 0; i < n; i++) 464aa835160SAndriy Gapon bus_generic_attach(devices[i]); 465aa835160SAndriy Gapon free(devices, M_TEMP); 466f8887b89SJohn Baldwin 467f8887b89SJohn Baldwin if (attached) { 468fdce57a0SJohn Baldwin #ifdef EARLY_AP_STARTUP 469fdce57a0SJohn Baldwin acpi_cpu_startup(NULL); 470fdce57a0SJohn Baldwin #else 471f8887b89SJohn Baldwin /* Queue post cpu-probing task handler */ 472f8887b89SJohn Baldwin AcpiOsExecute(OSL_NOTIFY_HANDLER, acpi_cpu_startup, NULL); 473fdce57a0SJohn Baldwin #endif 474f8887b89SJohn Baldwin } 475aa835160SAndriy Gapon } 476aa835160SAndriy Gapon 477aa835160SAndriy Gapon SYSINIT(acpi_cpu, SI_SUB_CONFIGURE, SI_ORDER_MIDDLE, 478aa835160SAndriy Gapon acpi_cpu_postattach, NULL); 479aa835160SAndriy Gapon 48009424d43SAndriy Gapon static void 48109424d43SAndriy Gapon disable_idle(struct acpi_cpu_softc *sc) 48209424d43SAndriy Gapon { 48309424d43SAndriy Gapon cpuset_t cpuset; 48409424d43SAndriy Gapon 48509424d43SAndriy Gapon CPU_SETOF(sc->cpu_pcpu->pc_cpuid, &cpuset); 48609424d43SAndriy Gapon sc->cpu_disable_idle = TRUE; 48709424d43SAndriy Gapon 48809424d43SAndriy Gapon /* 48909424d43SAndriy Gapon * Ensure that the CPU is not in idle state or in acpi_cpu_idle(). 49009424d43SAndriy Gapon * Note that this code depends on the fact that the rendezvous IPI 49109424d43SAndriy Gapon * can not penetrate context where interrupts are disabled and acpi_cpu_idle 49209424d43SAndriy Gapon * is called and executed in such a context with interrupts being re-enabled 49309424d43SAndriy Gapon * right before return. 49409424d43SAndriy Gapon */ 49567d955aaSPatrick Kelsey smp_rendezvous_cpus(cpuset, smp_no_rendezvous_barrier, NULL, 49667d955aaSPatrick Kelsey smp_no_rendezvous_barrier, NULL); 49709424d43SAndriy Gapon } 49809424d43SAndriy Gapon 49909424d43SAndriy Gapon static void 50009424d43SAndriy Gapon enable_idle(struct acpi_cpu_softc *sc) 50109424d43SAndriy Gapon { 50209424d43SAndriy Gapon 50309424d43SAndriy Gapon sc->cpu_disable_idle = FALSE; 50409424d43SAndriy Gapon } 50509424d43SAndriy Gapon 506617994efSAndrew Turner #if defined(__i386__) || defined(__amd64__) 50709424d43SAndriy Gapon static int 50809424d43SAndriy Gapon is_idle_disabled(struct acpi_cpu_softc *sc) 50909424d43SAndriy Gapon { 51009424d43SAndriy Gapon 51109424d43SAndriy Gapon return (sc->cpu_disable_idle); 51209424d43SAndriy Gapon } 513617994efSAndrew Turner #endif 51409424d43SAndriy Gapon 515b6426963SNate Lawson /* 5163331373cSNate Lawson * Disable any entry to the idle function during suspend and re-enable it 5173331373cSNate Lawson * during resume. 5183331373cSNate Lawson */ 5193331373cSNate Lawson static int 5203331373cSNate Lawson acpi_cpu_suspend(device_t dev) 5213331373cSNate Lawson { 5223331373cSNate Lawson int error; 5233331373cSNate Lawson 5243331373cSNate Lawson error = bus_generic_suspend(dev); 5253331373cSNate Lawson if (error) 5263331373cSNate Lawson return (error); 52709424d43SAndriy Gapon disable_idle(device_get_softc(dev)); 5283331373cSNate Lawson return (0); 5293331373cSNate Lawson } 5303331373cSNate Lawson 5313331373cSNate Lawson static int 5323331373cSNate Lawson acpi_cpu_resume(device_t dev) 5333331373cSNate Lawson { 5343331373cSNate Lawson 53509424d43SAndriy Gapon enable_idle(device_get_softc(dev)); 5363331373cSNate Lawson return (bus_generic_resume(dev)); 5373331373cSNate Lawson } 5383331373cSNate Lawson 5393331373cSNate Lawson /* 540c8077ccdSAlexander Motin * Find the processor associated with a given ACPI ID. 541b6426963SNate Lawson */ 542b6426963SNate Lawson static int 543c8077ccdSAlexander Motin acpi_pcpu_get_id(device_t dev, uint32_t acpi_id, u_int *cpu_id) 544b6426963SNate Lawson { 545e4cd9dcfSJohn Baldwin struct pcpu *pc; 546c8077ccdSAlexander Motin u_int i; 547b6426963SNate Lawson 548c8077ccdSAlexander Motin CPU_FOREACH(i) { 549c8077ccdSAlexander Motin pc = pcpu_find(i); 550c8077ccdSAlexander Motin if (pc->pc_acpi_id == acpi_id) { 551c8077ccdSAlexander Motin *cpu_id = pc->pc_cpuid; 552c8077ccdSAlexander Motin return (0); 553c8077ccdSAlexander Motin } 554c8077ccdSAlexander Motin } 555e4cd9dcfSJohn Baldwin 556e4cd9dcfSJohn Baldwin /* 557e4cd9dcfSJohn Baldwin * If pc_acpi_id for CPU 0 is not initialized (e.g. a non-APIC 558e4cd9dcfSJohn Baldwin * UP box) use the ACPI ID from the first processor we find. 559e4cd9dcfSJohn Baldwin */ 560c8077ccdSAlexander Motin if (mp_ncpus == 1) { 561e4cd9dcfSJohn Baldwin pc = pcpu_find(0); 562e4cd9dcfSJohn Baldwin if (pc->pc_acpi_id == 0xffffffff) 563c8077ccdSAlexander Motin pc->pc_acpi_id = acpi_id; 564e4cd9dcfSJohn Baldwin *cpu_id = 0; 565e4cd9dcfSJohn Baldwin return (0); 566e4cd9dcfSJohn Baldwin } 567e4cd9dcfSJohn Baldwin 568b6426963SNate Lawson return (ESRCH); 569b6426963SNate Lawson } 570b6426963SNate Lawson 57198aa9cd0SNate Lawson static struct resource_list * 57298aa9cd0SNate Lawson acpi_cpu_get_rlist(device_t dev, device_t child) 57398aa9cd0SNate Lawson { 57498aa9cd0SNate Lawson struct acpi_cpu_device *ad; 57598aa9cd0SNate Lawson 57698aa9cd0SNate Lawson ad = device_get_ivars(child); 57798aa9cd0SNate Lawson if (ad == NULL) 57898aa9cd0SNate Lawson return (NULL); 57998aa9cd0SNate Lawson return (&ad->ad_rl); 58098aa9cd0SNate Lawson } 58198aa9cd0SNate Lawson 58298aa9cd0SNate Lawson static device_t 5833d844eddSAndriy Gapon acpi_cpu_add_child(device_t dev, u_int order, const char *name, int unit) 58498aa9cd0SNate Lawson { 58598aa9cd0SNate Lawson struct acpi_cpu_device *ad; 58698aa9cd0SNate Lawson device_t child; 58798aa9cd0SNate Lawson 58898aa9cd0SNate Lawson if ((ad = malloc(sizeof(*ad), M_TEMP, M_NOWAIT | M_ZERO)) == NULL) 58998aa9cd0SNate Lawson return (NULL); 59098aa9cd0SNate Lawson 59198aa9cd0SNate Lawson resource_list_init(&ad->ad_rl); 59298aa9cd0SNate Lawson 59398aa9cd0SNate Lawson child = device_add_child_ordered(dev, order, name, unit); 59498aa9cd0SNate Lawson if (child != NULL) 59598aa9cd0SNate Lawson device_set_ivars(child, ad); 59643ce1c77SNate Lawson else 59743ce1c77SNate Lawson free(ad, M_TEMP); 59898aa9cd0SNate Lawson return (child); 59998aa9cd0SNate Lawson } 60098aa9cd0SNate Lawson 60198aa9cd0SNate Lawson static int 60298aa9cd0SNate Lawson acpi_cpu_read_ivar(device_t dev, device_t child, int index, uintptr_t *result) 60398aa9cd0SNate Lawson { 60498aa9cd0SNate Lawson struct acpi_cpu_softc *sc; 60598aa9cd0SNate Lawson 60698aa9cd0SNate Lawson sc = device_get_softc(dev); 60798aa9cd0SNate Lawson switch (index) { 60898aa9cd0SNate Lawson case ACPI_IVAR_HANDLE: 60998aa9cd0SNate Lawson *result = (uintptr_t)sc->cpu_handle; 61098aa9cd0SNate Lawson break; 61198aa9cd0SNate Lawson case CPU_IVAR_PCPU: 61298aa9cd0SNate Lawson *result = (uintptr_t)sc->cpu_pcpu; 61398aa9cd0SNate Lawson break; 614e1c9d39eSJung-uk Kim #if defined(__amd64__) || defined(__i386__) 615e1c9d39eSJung-uk Kim case CPU_IVAR_NOMINAL_MHZ: 616e1c9d39eSJung-uk Kim if (tsc_is_invariant) { 6173453537fSJung-uk Kim *result = (uintptr_t)(atomic_load_acq_64(&tsc_freq) / 1000000); 618e1c9d39eSJung-uk Kim break; 619e1c9d39eSJung-uk Kim } 620e1c9d39eSJung-uk Kim /* FALLTHROUGH */ 621e1c9d39eSJung-uk Kim #endif 62298aa9cd0SNate Lawson default: 62398aa9cd0SNate Lawson return (ENOENT); 62498aa9cd0SNate Lawson } 62598aa9cd0SNate Lawson return (0); 62698aa9cd0SNate Lawson } 62798aa9cd0SNate Lawson 6286b74f9b7SNate Lawson static int 62956a70eadSNate Lawson acpi_cpu_shutdown(device_t dev) 63056a70eadSNate Lawson { 63156a70eadSNate Lawson ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 63256a70eadSNate Lawson 63398aa9cd0SNate Lawson /* Allow children to shutdown first. */ 63498aa9cd0SNate Lawson bus_generic_shutdown(dev); 63598aa9cd0SNate Lawson 636cc3c11f9SNate Lawson /* 63709424d43SAndriy Gapon * Disable any entry to the idle function. 638cc3c11f9SNate Lawson */ 63909424d43SAndriy Gapon disable_idle(device_get_softc(dev)); 64009424d43SAndriy Gapon 64109424d43SAndriy Gapon /* 642453130d9SPedro F. Giffuni * CPU devices are not truly detached and remain referenced, 64309424d43SAndriy Gapon * so their resources are not freed. 64409424d43SAndriy Gapon */ 64556a70eadSNate Lawson 64656a70eadSNate Lawson return_VALUE (0); 64756a70eadSNate Lawson } 64856a70eadSNate Lawson 649907b6777SNate Lawson static void 6506b74f9b7SNate Lawson acpi_cpu_cx_probe(struct acpi_cpu_softc *sc) 6516b74f9b7SNate Lawson { 652907b6777SNate Lawson ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 653907b6777SNate Lawson 654907b6777SNate Lawson /* Use initial sleep value of 1 sec. to start with lowest idle state. */ 655907b6777SNate Lawson sc->cpu_prev_sleep = 1000000; 656907b6777SNate Lawson sc->cpu_cx_lowest = 0; 657d30b88afSAndriy Gapon sc->cpu_cx_lowest_lim = 0; 658907b6777SNate Lawson 659907b6777SNate Lawson /* 660907b6777SNate Lawson * Check for the ACPI 2.0 _CST sleep states object. If we can't find 661907b6777SNate Lawson * any, we'll revert to generic FADT/P_BLK Cx control method which will 662907b6777SNate Lawson * be handled by acpi_cpu_startup. We need to defer to after having 663907b6777SNate Lawson * probed all the cpus in the system before probing for generic Cx 664907b6777SNate Lawson * states as we may already have found cpus with valid _CST packages 665907b6777SNate Lawson */ 666907b6777SNate Lawson if (!cpu_cx_generic && acpi_cpu_cx_cst(sc) != 0) { 667907b6777SNate Lawson /* 668907b6777SNate Lawson * We were unable to find a _CST package for this cpu or there 669907b6777SNate Lawson * was an error parsing it. Switch back to generic mode. 670907b6777SNate Lawson */ 671907b6777SNate Lawson cpu_cx_generic = TRUE; 672bd826803SNate Lawson if (bootverbose) 673bd826803SNate Lawson device_printf(sc->cpu_dev, "switching to generic Cx mode\n"); 674907b6777SNate Lawson } 675907b6777SNate Lawson 676907b6777SNate Lawson /* 677907b6777SNate Lawson * TODO: _CSD Package should be checked here. 678907b6777SNate Lawson */ 679907b6777SNate Lawson } 680907b6777SNate Lawson 681907b6777SNate Lawson static void 682907b6777SNate Lawson acpi_cpu_generic_cx_probe(struct acpi_cpu_softc *sc) 683907b6777SNate Lawson { 6846b74f9b7SNate Lawson ACPI_GENERIC_ADDRESS gas; 6856b74f9b7SNate Lawson struct acpi_cx *cx_ptr; 68656a70eadSNate Lawson 68756a70eadSNate Lawson sc->cpu_cx_count = 0; 6886b74f9b7SNate Lawson cx_ptr = sc->cpu_cx_states; 689fec754d4SMike Smith 690907b6777SNate Lawson /* Use initial sleep value of 1 sec. to start with lowest idle state. */ 691907b6777SNate Lawson sc->cpu_prev_sleep = 1000000; 692907b6777SNate Lawson 6936b74f9b7SNate Lawson /* C1 has been required since just after ACPI 1.0 */ 6946b74f9b7SNate Lawson cx_ptr->type = ACPI_STATE_C1; 6956b74f9b7SNate Lawson cx_ptr->trans_lat = 0; 6966b74f9b7SNate Lawson cx_ptr++; 69792597e06SJohn Baldwin sc->cpu_non_c2 = sc->cpu_cx_count; 698987e5277SAndriy Gapon sc->cpu_non_c3 = sc->cpu_cx_count; 69956a70eadSNate Lawson sc->cpu_cx_count++; 70056a70eadSNate Lawson 701c181b89bSNate Lawson /* 702c181b89bSNate Lawson * The spec says P_BLK must be 6 bytes long. However, some systems 703c181b89bSNate Lawson * use it to indicate a fractional set of features present so we 704c181b89bSNate Lawson * take 5 as C2. Some may also have a value of 7 to indicate 705c181b89bSNate Lawson * another C3 but most use _CST for this (as required) and having 706c181b89bSNate Lawson * "only" C1-C3 is not a hardship. 707c181b89bSNate Lawson */ 708c181b89bSNate Lawson if (sc->cpu_p_blk_len < 5) 709907b6777SNate Lawson return; 710fec754d4SMike Smith 7116b74f9b7SNate Lawson /* Validate and allocate resources for C2 (P_LVL2). */ 7122be4e471SJung-uk Kim gas.SpaceId = ACPI_ADR_SPACE_SYSTEM_IO; 7132be4e471SJung-uk Kim gas.BitWidth = 8; 7142be4e471SJung-uk Kim if (AcpiGbl_FADT.C2Latency <= 100) { 71556a70eadSNate Lawson gas.Address = sc->cpu_p_blk + 4; 716f51d43feSAndriy Gapon cx_ptr->res_rid = 0; 717f51d43feSAndriy Gapon acpi_bus_alloc_gas(sc->cpu_dev, &cx_ptr->res_type, &cx_ptr->res_rid, 718907b6777SNate Lawson &gas, &cx_ptr->p_lvlx, RF_SHAREABLE); 7196b74f9b7SNate Lawson if (cx_ptr->p_lvlx != NULL) { 7206b74f9b7SNate Lawson cx_ptr->type = ACPI_STATE_C2; 7212be4e471SJung-uk Kim cx_ptr->trans_lat = AcpiGbl_FADT.C2Latency; 7226b74f9b7SNate Lawson cx_ptr++; 723987e5277SAndriy Gapon sc->cpu_non_c3 = sc->cpu_cx_count; 72456a70eadSNate Lawson sc->cpu_cx_count++; 725fec754d4SMike Smith } 726fec754d4SMike Smith } 727c181b89bSNate Lawson if (sc->cpu_p_blk_len < 6) 728907b6777SNate Lawson return; 729be2b1797SNate Lawson 7306b74f9b7SNate Lawson /* Validate and allocate resources for C3 (P_LVL3). */ 7316e1de64dSRui Paulo if (AcpiGbl_FADT.C3Latency <= 1000 && !(cpu_quirks & CPU_QUIRK_NO_C3)) { 73256a70eadSNate Lawson gas.Address = sc->cpu_p_blk + 5; 733f51d43feSAndriy Gapon cx_ptr->res_rid = 1; 734f51d43feSAndriy Gapon acpi_bus_alloc_gas(sc->cpu_dev, &cx_ptr->res_type, &cx_ptr->res_rid, 735f51d43feSAndriy Gapon &gas, &cx_ptr->p_lvlx, RF_SHAREABLE); 7366b74f9b7SNate Lawson if (cx_ptr->p_lvlx != NULL) { 7376b74f9b7SNate Lawson cx_ptr->type = ACPI_STATE_C3; 7382be4e471SJung-uk Kim cx_ptr->trans_lat = AcpiGbl_FADT.C3Latency; 7396b74f9b7SNate Lawson cx_ptr++; 74056a70eadSNate Lawson sc->cpu_cx_count++; 7416b74f9b7SNate Lawson } 7426b74f9b7SNate Lawson } 7436b74f9b7SNate Lawson } 7446b74f9b7SNate Lawson 745044a49cdSAndrew Turner #if defined(__i386__) || defined(__amd64__) 746b57a73f8SKonstantin Belousov static void 747b57a73f8SKonstantin Belousov acpi_cpu_cx_cst_mwait(struct acpi_cx *cx_ptr, uint64_t address, int accsize) 748b57a73f8SKonstantin Belousov { 749b57a73f8SKonstantin Belousov 750b57a73f8SKonstantin Belousov cx_ptr->do_mwait = true; 751b57a73f8SKonstantin Belousov cx_ptr->mwait_hint = address & 0xffffffff; 752b57a73f8SKonstantin Belousov cx_ptr->mwait_hw_coord = (accsize & CST_FFH_MWAIT_HW_COORD) != 0; 753b57a73f8SKonstantin Belousov cx_ptr->mwait_bm_avoidance = (accsize & CST_FFH_MWAIT_BM_AVOID) != 0; 754b57a73f8SKonstantin Belousov } 755044a49cdSAndrew Turner #endif 756b57a73f8SKonstantin Belousov 757b57a73f8SKonstantin Belousov static void 758b57a73f8SKonstantin Belousov acpi_cpu_cx_cst_free_plvlx(device_t cpu_dev, struct acpi_cx *cx_ptr) 759b57a73f8SKonstantin Belousov { 760b57a73f8SKonstantin Belousov 761b57a73f8SKonstantin Belousov if (cx_ptr->p_lvlx == NULL) 762b57a73f8SKonstantin Belousov return; 763b57a73f8SKonstantin Belousov bus_release_resource(cpu_dev, cx_ptr->res_type, cx_ptr->res_rid, 764b57a73f8SKonstantin Belousov cx_ptr->p_lvlx); 765b57a73f8SKonstantin Belousov cx_ptr->p_lvlx = NULL; 766b57a73f8SKonstantin Belousov } 767b57a73f8SKonstantin Belousov 7686b74f9b7SNate Lawson /* 7696b74f9b7SNate Lawson * Parse a _CST package and set up its Cx states. Since the _CST object 7706b74f9b7SNate Lawson * can change dynamically, our notify handler may call this function 7716b74f9b7SNate Lawson * to clean up and probe the new _CST package. 7726b74f9b7SNate Lawson */ 7736b74f9b7SNate Lawson static int 7746b74f9b7SNate Lawson acpi_cpu_cx_cst(struct acpi_cpu_softc *sc) 7756b74f9b7SNate Lawson { 7766b74f9b7SNate Lawson struct acpi_cx *cx_ptr; 7776b74f9b7SNate Lawson ACPI_STATUS status; 7786b74f9b7SNate Lawson ACPI_BUFFER buf; 7796b74f9b7SNate Lawson ACPI_OBJECT *top; 7806b74f9b7SNate Lawson ACPI_OBJECT *pkg; 7816b74f9b7SNate Lawson uint32_t count; 782044a49cdSAndrew Turner int i; 783044a49cdSAndrew Turner #if defined(__i386__) || defined(__amd64__) 784b57a73f8SKonstantin Belousov uint64_t address; 785044a49cdSAndrew Turner int vendor, class, accsize; 786044a49cdSAndrew Turner #endif 7876b74f9b7SNate Lawson 78856a70eadSNate Lawson ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 78956a70eadSNate Lawson 7906b74f9b7SNate Lawson buf.Pointer = NULL; 7916b74f9b7SNate Lawson buf.Length = ACPI_ALLOCATE_BUFFER; 7926b74f9b7SNate Lawson status = AcpiEvaluateObject(sc->cpu_handle, "_CST", NULL, &buf); 793bd826803SNate Lawson if (ACPI_FAILURE(status)) 7946b74f9b7SNate Lawson return (ENXIO); 7956b74f9b7SNate Lawson 7966b74f9b7SNate Lawson /* _CST is a package with a count and at least one Cx package. */ 7976b74f9b7SNate Lawson top = (ACPI_OBJECT *)buf.Pointer; 79821cea91fSNate Lawson if (!ACPI_PKG_VALID(top, 2) || acpi_PkgInt32(top, 0, &count) != 0) { 799bd826803SNate Lawson device_printf(sc->cpu_dev, "invalid _CST package\n"); 8006b74f9b7SNate Lawson AcpiOsFree(buf.Pointer); 8016b74f9b7SNate Lawson return (ENXIO); 8026b74f9b7SNate Lawson } 8036b74f9b7SNate Lawson if (count != top->Package.Count - 1) { 804bd826803SNate Lawson device_printf(sc->cpu_dev, "invalid _CST state count (%d != %d)\n", 8056b74f9b7SNate Lawson count, top->Package.Count - 1); 8066b74f9b7SNate Lawson count = top->Package.Count - 1; 8076b74f9b7SNate Lawson } 8086b74f9b7SNate Lawson if (count > MAX_CX_STATES) { 80956a70eadSNate Lawson device_printf(sc->cpu_dev, "_CST has too many states (%d)\n", count); 8106b74f9b7SNate Lawson count = MAX_CX_STATES; 8116b74f9b7SNate Lawson } 8126b74f9b7SNate Lawson 81392597e06SJohn Baldwin sc->cpu_non_c2 = 0; 81468d5e11cSJung-uk Kim sc->cpu_non_c3 = 0; 81556a70eadSNate Lawson sc->cpu_cx_count = 0; 8166b74f9b7SNate Lawson cx_ptr = sc->cpu_cx_states; 81768d5e11cSJung-uk Kim 81868d5e11cSJung-uk Kim /* 81968d5e11cSJung-uk Kim * C1 has been required since just after ACPI 1.0. 82068d5e11cSJung-uk Kim * Reserve the first slot for it. 82168d5e11cSJung-uk Kim */ 82268d5e11cSJung-uk Kim cx_ptr->type = ACPI_STATE_C0; 82368d5e11cSJung-uk Kim cx_ptr++; 82468d5e11cSJung-uk Kim sc->cpu_cx_count++; 82568d5e11cSJung-uk Kim 82668d5e11cSJung-uk Kim /* Set up all valid states. */ 8276b74f9b7SNate Lawson for (i = 0; i < count; i++) { 8286b74f9b7SNate Lawson pkg = &top->Package.Elements[i + 1]; 82921cea91fSNate Lawson if (!ACPI_PKG_VALID(pkg, 4) || 83021cea91fSNate Lawson acpi_PkgInt32(pkg, 1, &cx_ptr->type) != 0 || 83121cea91fSNate Lawson acpi_PkgInt32(pkg, 2, &cx_ptr->trans_lat) != 0 || 83221cea91fSNate Lawson acpi_PkgInt32(pkg, 3, &cx_ptr->power) != 0) { 83380f006a1SNate Lawson device_printf(sc->cpu_dev, "skipping invalid Cx state package\n"); 8346b74f9b7SNate Lawson continue; 8356b74f9b7SNate Lawson } 8366b74f9b7SNate Lawson 8376b74f9b7SNate Lawson /* Validate the state to see if we should use it. */ 8386b74f9b7SNate Lawson switch (cx_ptr->type) { 8396b74f9b7SNate Lawson case ACPI_STATE_C1: 840b57a73f8SKonstantin Belousov acpi_cpu_cx_cst_free_plvlx(sc->cpu_dev, cx_ptr); 841b57a73f8SKonstantin Belousov #if defined(__i386__) || defined(__amd64__) 842b57a73f8SKonstantin Belousov if (acpi_PkgFFH_IntelCpu(pkg, 0, &vendor, &class, &address, 843b57a73f8SKonstantin Belousov &accsize) == 0 && vendor == CST_FFH_VENDOR_INTEL) { 844b57a73f8SKonstantin Belousov if (class == CST_FFH_INTEL_CL_C1IO) { 845b57a73f8SKonstantin Belousov /* C1 I/O then Halt */ 846b57a73f8SKonstantin Belousov cx_ptr->res_rid = sc->cpu_cx_count; 847b57a73f8SKonstantin Belousov bus_set_resource(sc->cpu_dev, SYS_RES_IOPORT, 848b57a73f8SKonstantin Belousov cx_ptr->res_rid, address, 1); 849b57a73f8SKonstantin Belousov cx_ptr->p_lvlx = bus_alloc_resource_any(sc->cpu_dev, 850b57a73f8SKonstantin Belousov SYS_RES_IOPORT, &cx_ptr->res_rid, RF_ACTIVE | 851b57a73f8SKonstantin Belousov RF_SHAREABLE); 852b57a73f8SKonstantin Belousov if (cx_ptr->p_lvlx == NULL) { 853b57a73f8SKonstantin Belousov bus_delete_resource(sc->cpu_dev, SYS_RES_IOPORT, 854b57a73f8SKonstantin Belousov cx_ptr->res_rid); 855b57a73f8SKonstantin Belousov device_printf(sc->cpu_dev, 856b57a73f8SKonstantin Belousov "C1 I/O failed to allocate port %d, " 857b57a73f8SKonstantin Belousov "degrading to C1 Halt", (int)address); 858b57a73f8SKonstantin Belousov } 859b57a73f8SKonstantin Belousov } else if (class == CST_FFH_INTEL_CL_MWAIT) { 860b57a73f8SKonstantin Belousov acpi_cpu_cx_cst_mwait(cx_ptr, address, accsize); 861b57a73f8SKonstantin Belousov } 862b57a73f8SKonstantin Belousov } 863b57a73f8SKonstantin Belousov #endif 86468d5e11cSJung-uk Kim if (sc->cpu_cx_states[0].type == ACPI_STATE_C0) { 86568d5e11cSJung-uk Kim /* This is the first C1 state. Use the reserved slot. */ 86668d5e11cSJung-uk Kim sc->cpu_cx_states[0] = *cx_ptr; 86768d5e11cSJung-uk Kim } else { 86892597e06SJohn Baldwin sc->cpu_non_c2 = sc->cpu_cx_count; 86956101001SAndriy Gapon sc->cpu_non_c3 = sc->cpu_cx_count; 8706b74f9b7SNate Lawson cx_ptr++; 87156a70eadSNate Lawson sc->cpu_cx_count++; 87268d5e11cSJung-uk Kim } 8736b74f9b7SNate Lawson continue; 8746b74f9b7SNate Lawson case ACPI_STATE_C2: 87556101001SAndriy Gapon sc->cpu_non_c3 = sc->cpu_cx_count; 8766b74f9b7SNate Lawson break; 8776b74f9b7SNate Lawson case ACPI_STATE_C3: 8786b74f9b7SNate Lawson default: 87909c22c66SAndriy Gapon if ((cpu_quirks & CPU_QUIRK_NO_C3) != 0) { 88056a70eadSNate Lawson ACPI_DEBUG_PRINT((ACPI_DB_INFO, 88156a70eadSNate Lawson "acpi_cpu%d: C3[%d] not available.\n", 88256a70eadSNate Lawson device_get_unit(sc->cpu_dev), i)); 8836b74f9b7SNate Lawson continue; 8848cd59625SKonstantin Belousov } 8856b74f9b7SNate Lawson break; 8866b74f9b7SNate Lawson } 8876b74f9b7SNate Lawson 8886b74f9b7SNate Lawson /* Free up any previous register. */ 889b57a73f8SKonstantin Belousov acpi_cpu_cx_cst_free_plvlx(sc->cpu_dev, cx_ptr); 8906b74f9b7SNate Lawson 8916b74f9b7SNate Lawson /* Allocate the control register for C2 or C3. */ 892b57a73f8SKonstantin Belousov #if defined(__i386__) || defined(__amd64__) 893b57a73f8SKonstantin Belousov if (acpi_PkgFFH_IntelCpu(pkg, 0, &vendor, &class, &address, 894b57a73f8SKonstantin Belousov &accsize) == 0 && vendor == CST_FFH_VENDOR_INTEL && 895b57a73f8SKonstantin Belousov class == CST_FFH_INTEL_CL_MWAIT) { 896b57a73f8SKonstantin Belousov /* Native C State Instruction use (mwait) */ 897b57a73f8SKonstantin Belousov acpi_cpu_cx_cst_mwait(cx_ptr, address, accsize); 898b57a73f8SKonstantin Belousov ACPI_DEBUG_PRINT((ACPI_DB_INFO, 899b57a73f8SKonstantin Belousov "acpi_cpu%d: Got C%d/mwait - %d latency\n", 900b57a73f8SKonstantin Belousov device_get_unit(sc->cpu_dev), cx_ptr->type, cx_ptr->trans_lat)); 901b57a73f8SKonstantin Belousov cx_ptr++; 902b57a73f8SKonstantin Belousov sc->cpu_cx_count++; 903b57a73f8SKonstantin Belousov } else 904b57a73f8SKonstantin Belousov #endif 905b57a73f8SKonstantin Belousov { 906f51d43feSAndriy Gapon cx_ptr->res_rid = sc->cpu_cx_count; 907b57a73f8SKonstantin Belousov acpi_PkgGas(sc->cpu_dev, pkg, 0, &cx_ptr->res_type, 908b57a73f8SKonstantin Belousov &cx_ptr->res_rid, &cx_ptr->p_lvlx, RF_SHAREABLE); 909f4eb0418SNate Lawson if (cx_ptr->p_lvlx) { 91056a70eadSNate Lawson ACPI_DEBUG_PRINT((ACPI_DB_INFO, 91156a70eadSNate Lawson "acpi_cpu%d: Got C%d - %d latency\n", 91256a70eadSNate Lawson device_get_unit(sc->cpu_dev), cx_ptr->type, 91356a70eadSNate Lawson cx_ptr->trans_lat)); 9146b74f9b7SNate Lawson cx_ptr++; 91556a70eadSNate Lawson sc->cpu_cx_count++; 9166b74f9b7SNate Lawson } 9176b74f9b7SNate Lawson } 918b57a73f8SKonstantin Belousov } 9196b74f9b7SNate Lawson AcpiOsFree(buf.Pointer); 9206b74f9b7SNate Lawson 92168d5e11cSJung-uk Kim /* If C1 state was not found, we need one now. */ 92268d5e11cSJung-uk Kim cx_ptr = sc->cpu_cx_states; 92368d5e11cSJung-uk Kim if (cx_ptr->type == ACPI_STATE_C0) { 92468d5e11cSJung-uk Kim cx_ptr->type = ACPI_STATE_C1; 92568d5e11cSJung-uk Kim cx_ptr->trans_lat = 0; 92668d5e11cSJung-uk Kim } 92768d5e11cSJung-uk Kim 9286b74f9b7SNate Lawson return (0); 929fec754d4SMike Smith } 930fec754d4SMike Smith 931fec754d4SMike Smith /* 932fec754d4SMike Smith * Call this *after* all CPUs have been attached. 933fec754d4SMike Smith */ 934fec754d4SMike Smith static void 9356b74f9b7SNate Lawson acpi_cpu_startup(void *arg) 936fec754d4SMike Smith { 93756a70eadSNate Lawson struct acpi_cpu_softc *sc; 938907b6777SNate Lawson int i; 939fec754d4SMike Smith 940be2b1797SNate Lawson /* Get set of CPU devices */ 9413045c8afSNate Lawson devclass_get_devices(acpi_cpu_devclass, &cpu_devices, &cpu_ndevices); 942fec754d4SMike Smith 94356a70eadSNate Lawson /* 944907b6777SNate Lawson * Setup any quirks that might necessary now that we have probed 945907b6777SNate Lawson * all the CPUs 94656a70eadSNate Lawson */ 947907b6777SNate Lawson acpi_cpu_quirks(); 948907b6777SNate Lawson 949907b6777SNate Lawson if (cpu_cx_generic) { 950907b6777SNate Lawson /* 951907b6777SNate Lawson * We are using generic Cx mode, probe for available Cx states 952907b6777SNate Lawson * for all processors. 953907b6777SNate Lawson */ 95456a70eadSNate Lawson for (i = 0; i < cpu_ndevices; i++) { 95556a70eadSNate Lawson sc = device_get_softc(cpu_devices[i]); 956907b6777SNate Lawson acpi_cpu_generic_cx_probe(sc); 957907b6777SNate Lawson } 958907b6777SNate Lawson } else { 959907b6777SNate Lawson /* 960907b6777SNate Lawson * We are using _CST mode, remove C3 state if necessary. 961907b6777SNate Lawson * As we now know for sure that we will be using _CST mode 962907b6777SNate Lawson * install our notify handler. 963907b6777SNate Lawson */ 964907b6777SNate Lawson for (i = 0; i < cpu_ndevices; i++) { 965907b6777SNate Lawson sc = device_get_softc(cpu_devices[i]); 9667a310721SJohn Baldwin if (cpu_quirks & CPU_QUIRK_NO_C3) { 967633a2847SColin Percival sc->cpu_cx_count = min(sc->cpu_cx_count, sc->cpu_non_c3 + 1); 968907b6777SNate Lawson } 969907b6777SNate Lawson AcpiInstallNotifyHandler(sc->cpu_handle, ACPI_DEVICE_NOTIFY, 970907b6777SNate Lawson acpi_cpu_notify, sc); 971907b6777SNate Lawson } 972907b6777SNate Lawson } 97356a70eadSNate Lawson 9748c5468e3SNate Lawson /* Perform Cx final initialization. */ 975907b6777SNate Lawson for (i = 0; i < cpu_ndevices; i++) { 976907b6777SNate Lawson sc = device_get_softc(cpu_devices[i]); 977907b6777SNate Lawson acpi_cpu_startup_cx(sc); 978907b6777SNate Lawson } 979907b6777SNate Lawson 980907b6777SNate Lawson /* Add a sysctl handler to handle global Cx lowest setting */ 981907b6777SNate Lawson SYSCTL_ADD_PROC(&cpu_sysctl_ctx, SYSCTL_CHILDREN(cpu_sysctl_tree), 9827029da5cSPawel Biernacki OID_AUTO, "cx_lowest", CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_NEEDGIANT, 983907b6777SNate Lawson NULL, 0, acpi_cpu_global_cx_lowest_sysctl, "A", 984907b6777SNate Lawson "Global lowest Cx sleep state to use"); 985907b6777SNate Lawson 986907b6777SNate Lawson /* Take over idling from cpu_idle_default(). */ 987d30b88afSAndriy Gapon cpu_cx_lowest_lim = 0; 98809424d43SAndriy Gapon for (i = 0; i < cpu_ndevices; i++) { 98909424d43SAndriy Gapon sc = device_get_softc(cpu_devices[i]); 99009424d43SAndriy Gapon enable_idle(sc); 99109424d43SAndriy Gapon } 992617994efSAndrew Turner #if defined(__i386__) || defined(__amd64__) 993907b6777SNate Lawson cpu_idle_hook = acpi_cpu_idle; 994617994efSAndrew Turner #endif 9956b74f9b7SNate Lawson } 9966b74f9b7SNate Lawson 99756a70eadSNate Lawson static void 99889ab2a7aSRui Paulo acpi_cpu_cx_list(struct acpi_cpu_softc *sc) 99956a70eadSNate Lawson { 100056a70eadSNate Lawson struct sbuf sb; 100156a70eadSNate Lawson int i; 100256a70eadSNate Lawson 1003ae56b59fSNate Lawson /* 1004907b6777SNate Lawson * Set up the list of Cx states 1005ae56b59fSNate Lawson */ 1006907b6777SNate Lawson sbuf_new(&sb, sc->cpu_cx_supported, sizeof(sc->cpu_cx_supported), 1007907b6777SNate Lawson SBUF_FIXEDLEN); 1008412ef220SAndriy Gapon for (i = 0; i < sc->cpu_cx_count; i++) 10093c5c5559SAlexander Motin sbuf_printf(&sb, "C%d/%d/%d ", i + 1, sc->cpu_cx_states[i].type, 10103c5c5559SAlexander Motin sc->cpu_cx_states[i].trans_lat); 101156a70eadSNate Lawson sbuf_trim(&sb); 101256a70eadSNate Lawson sbuf_finish(&sb); 101389ab2a7aSRui Paulo } 101489ab2a7aSRui Paulo 101589ab2a7aSRui Paulo static void 101689ab2a7aSRui Paulo acpi_cpu_startup_cx(struct acpi_cpu_softc *sc) 101789ab2a7aSRui Paulo { 101889ab2a7aSRui Paulo acpi_cpu_cx_list(sc); 1019907b6777SNate Lawson 1020907b6777SNate Lawson SYSCTL_ADD_STRING(&sc->cpu_sysctl_ctx, 1021907b6777SNate Lawson SYSCTL_CHILDREN(device_get_sysctl_tree(sc->cpu_dev)), 1022907b6777SNate Lawson OID_AUTO, "cx_supported", CTLFLAG_RD, 1023907b6777SNate Lawson sc->cpu_cx_supported, 0, 1024907b6777SNate Lawson "Cx/microsecond values for supported Cx states"); 1025907b6777SNate Lawson SYSCTL_ADD_PROC(&sc->cpu_sysctl_ctx, 10267029da5cSPawel Biernacki SYSCTL_CHILDREN(device_get_sysctl_tree(sc->cpu_dev)), OID_AUTO, 10277029da5cSPawel Biernacki "cx_lowest", CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_NEEDGIANT, 1028907b6777SNate Lawson (void *)sc, 0, acpi_cpu_cx_lowest_sysctl, "A", 102956a70eadSNate Lawson "lowest Cx sleep state to use"); 1030907b6777SNate Lawson SYSCTL_ADD_PROC(&sc->cpu_sysctl_ctx, 10317029da5cSPawel Biernacki SYSCTL_CHILDREN(device_get_sysctl_tree(sc->cpu_dev)), OID_AUTO, 10327029da5cSPawel Biernacki "cx_usage", CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_NEEDGIANT, 1033907b6777SNate Lawson (void *)sc, 0, acpi_cpu_usage_sysctl, "A", 1034a2afe45aSNate Lawson "percent usage for each Cx state"); 10350d470054SAdrian Chadd SYSCTL_ADD_PROC(&sc->cpu_sysctl_ctx, 10367029da5cSPawel Biernacki SYSCTL_CHILDREN(device_get_sysctl_tree(sc->cpu_dev)), OID_AUTO, 10377029da5cSPawel Biernacki "cx_usage_counters", CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_NEEDGIANT, 10380d470054SAdrian Chadd (void *)sc, 0, acpi_cpu_usage_counters_sysctl, "A", 10390d470054SAdrian Chadd "Cx sleep state counters"); 1040b57a73f8SKonstantin Belousov #if defined(__i386__) || defined(__amd64__) 1041b57a73f8SKonstantin Belousov SYSCTL_ADD_PROC(&sc->cpu_sysctl_ctx, 10427029da5cSPawel Biernacki SYSCTL_CHILDREN(device_get_sysctl_tree(sc->cpu_dev)), OID_AUTO, 10437029da5cSPawel Biernacki "cx_method", CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_NEEDGIANT, 10447029da5cSPawel Biernacki (void *)sc, 0, acpi_cpu_method_sysctl, "A", "Cx entrance methods"); 1045b57a73f8SKonstantin Belousov #endif 104656a70eadSNate Lawson 104756a70eadSNate Lawson /* Signal platform that we can handle _CST notification. */ 1048907b6777SNate Lawson if (!cpu_cx_generic && cpu_cst_cnt != 0) { 1049d92a2ebdSNate Lawson ACPI_LOCK(acpi); 105056a70eadSNate Lawson AcpiOsWritePort(cpu_smi_cmd, cpu_cst_cnt, 8); 1051d92a2ebdSNate Lawson ACPI_UNLOCK(acpi); 105256a70eadSNate Lawson } 105356a70eadSNate Lawson } 105456a70eadSNate Lawson 1055617994efSAndrew Turner #if defined(__i386__) || defined(__amd64__) 1056fec754d4SMike Smith /* 1057a2afe45aSNate Lawson * Idle the CPU in the lowest state possible. This function is called with 1058a2afe45aSNate Lawson * interrupts disabled. Note that once it re-enables interrupts, a task 1059a2afe45aSNate Lawson * switch can occur so do not access shared data (i.e. the softc) after 1060a2afe45aSNate Lawson * interrupts are re-enabled. 10616b74f9b7SNate Lawson */ 10626b74f9b7SNate Lawson static void 1063acccf7d8SDavide Italiano acpi_cpu_idle(sbintime_t sbt) 10646b74f9b7SNate Lawson { 10656b74f9b7SNate Lawson struct acpi_cpu_softc *sc; 106656a70eadSNate Lawson struct acpi_cx *cx_next; 10672cee045bSAlexander Motin uint64_t start_ticks, end_ticks; 10686b74f9b7SNate Lawson uint32_t start_time, end_time; 10699ae8e006SJung-uk Kim ACPI_STATUS status; 1070acccf7d8SDavide Italiano int bm_active, cx_next_idx, i, us; 10716b74f9b7SNate Lawson 1072cd1f3db9SNate Lawson /* 1073cd1f3db9SNate Lawson * Look up our CPU id to get our softc. If it's NULL, we'll use C1 1074cd1f3db9SNate Lawson * since there is no ACPI processor object for this CPU. This occurs 1075cd1f3db9SNate Lawson * for logical CPUs in the HTT case. 1076cd1f3db9SNate Lawson */ 1077cd1f3db9SNate Lawson sc = cpu_softc[PCPU_GET(cpuid)]; 1078cd1f3db9SNate Lawson if (sc == NULL) { 1079cd1f3db9SNate Lawson acpi_cpu_c1(); 1080cd1f3db9SNate Lawson return; 1081cd1f3db9SNate Lawson } 1082cd1f3db9SNate Lawson 108330bf6110SAndriy Gapon /* If disabled, take the safe path. */ 108409424d43SAndriy Gapon if (is_idle_disabled(sc)) { 108530bf6110SAndriy Gapon acpi_cpu_c1(); 108609424d43SAndriy Gapon return; 108709424d43SAndriy Gapon } 108809424d43SAndriy Gapon 1089bb1d6ad5SAlexander Motin /* Find the lowest state that has small enough latency. */ 1090acccf7d8SDavide Italiano us = sc->cpu_prev_sleep; 1091d9ddf0c0SDavide Italiano if (sbt >= 0 && us > (sbt >> 12)) 1092d9ddf0c0SDavide Italiano us = (sbt >> 12); 1093b0baaaaeSAlexander Motin cx_next_idx = 0; 109492597e06SJohn Baldwin if (cpu_disable_c2_sleep) 109592597e06SJohn Baldwin i = min(sc->cpu_cx_lowest, sc->cpu_non_c2); 109692597e06SJohn Baldwin else if (cpu_disable_c3_sleep) 109748fe2e67SAlexander Motin i = min(sc->cpu_cx_lowest, sc->cpu_non_c3); 109855fb7f36SSean Bruno else 1099a157e425SAlexander Motin i = sc->cpu_cx_lowest; 1100a157e425SAlexander Motin for (; i >= 0; i--) { 1101acccf7d8SDavide Italiano if (sc->cpu_cx_states[i].trans_lat * 3 <= us) { 1102a2afe45aSNate Lawson cx_next_idx = i; 1103a2afe45aSNate Lawson break; 1104a2afe45aSNate Lawson } 110580f006a1SNate Lawson } 110656a70eadSNate Lawson 11076b74f9b7SNate Lawson /* 11086b74f9b7SNate Lawson * Check for bus master activity. If there was activity, clear 11096b74f9b7SNate Lawson * the bit and use the lowest non-C3 state. Note that the USB 11106b74f9b7SNate Lawson * driver polling for new devices keeps this bit set all the 1111f435261dSNate Lawson * time if USB is loaded. 11126b74f9b7SNate Lawson */ 111345521967SAlexander Motin cx_next = &sc->cpu_cx_states[cx_next_idx]; 11143c5c5559SAlexander Motin if ((cpu_quirks & CPU_QUIRK_NO_BM_CTRL) == 0 && 111545521967SAlexander Motin cx_next_idx > sc->cpu_non_c3 && 111645521967SAlexander Motin (!cx_next->do_mwait || cx_next->mwait_bm_avoidance)) { 11179ae8e006SJung-uk Kim status = AcpiReadBitRegister(ACPI_BITREG_BUS_MASTER_STATUS, &bm_active); 11189ae8e006SJung-uk Kim if (ACPI_SUCCESS(status) && bm_active != 0) { 1119129d3046SJung-uk Kim AcpiWriteBitRegister(ACPI_BITREG_BUS_MASTER_STATUS, 1); 11203c5c5559SAlexander Motin cx_next_idx = sc->cpu_non_c3; 112145521967SAlexander Motin cx_next = &sc->cpu_cx_states[cx_next_idx]; 11226b74f9b7SNate Lawson } 1123f435261dSNate Lawson } 11246b74f9b7SNate Lawson 1125a2afe45aSNate Lawson /* Select the next state and update statistics. */ 1126907b6777SNate Lawson sc->cpu_cx_stats[cx_next_idx]++; 1127a2afe45aSNate Lawson KASSERT(cx_next->type != ACPI_STATE_C0, ("acpi_cpu_idle: C0 sleep")); 11286b74f9b7SNate Lawson 11296b74f9b7SNate Lawson /* 1130a2afe45aSNate Lawson * Execute HLT (or equivalent) and wait for an interrupt. We can't 11317150e671SAlexander Motin * precisely calculate the time spent in C1 since the place we wake up 1132a157e425SAlexander Motin * is an ISR. Assume we slept no more then half of quantum, unless 1133a157e425SAlexander Motin * we are called inside critical section, delaying context switch. 11346b74f9b7SNate Lawson */ 1135a2afe45aSNate Lawson if (cx_next->type == ACPI_STATE_C1) { 11362cee045bSAlexander Motin start_ticks = cpu_ticks(); 1137b57a73f8SKonstantin Belousov if (cx_next->p_lvlx != NULL) { 1138b57a73f8SKonstantin Belousov /* C1 I/O then Halt */ 1139b57a73f8SKonstantin Belousov CPU_GET_REG(cx_next->p_lvlx, 1); 1140b57a73f8SKonstantin Belousov } 1141b57a73f8SKonstantin Belousov if (cx_next->do_mwait) 1142b57a73f8SKonstantin Belousov acpi_cpu_idle_mwait(cx_next->mwait_hint); 1143b57a73f8SKonstantin Belousov else 1144a2afe45aSNate Lawson acpi_cpu_c1(); 11452cee045bSAlexander Motin end_ticks = cpu_ticks(); 114619d4720bSJonathan T. Looney /* acpi_cpu_c1() returns with interrupts enabled. */ 114719d4720bSJonathan T. Looney if (cx_next->do_mwait) 114819d4720bSJonathan T. Looney ACPI_ENABLE_IRQS(); 11492cee045bSAlexander Motin end_time = ((end_ticks - start_ticks) << 20) / cpu_tickrate(); 11502cee045bSAlexander Motin if (!cx_next->do_mwait && curthread->td_critnest == 0) 11512cee045bSAlexander Motin end_time = min(end_time, 500000 / hz); 1152a157e425SAlexander Motin sc->cpu_prev_sleep = (sc->cpu_prev_sleep * 3 + end_time) / 4; 1153a2afe45aSNate Lawson return; 1154a2afe45aSNate Lawson } 1155a2afe45aSNate Lawson 1156f435261dSNate Lawson /* 1157f435261dSNate Lawson * For C3, disable bus master arbitration and enable bus master wake 1158f435261dSNate Lawson * if BM control is available, otherwise flush the CPU cache. 1159f435261dSNate Lawson */ 116045521967SAlexander Motin if (cx_next->type == ACPI_STATE_C3) { 1161f435261dSNate Lawson if ((cpu_quirks & CPU_QUIRK_NO_BM_CTRL) == 0) { 1162129d3046SJung-uk Kim AcpiWriteBitRegister(ACPI_BITREG_ARB_DISABLE, 1); 1163129d3046SJung-uk Kim AcpiWriteBitRegister(ACPI_BITREG_BUS_MASTER_RLD, 1); 1164f435261dSNate Lawson } else 1165f435261dSNate Lawson ACPI_FLUSH_CPU_CACHE(); 1166a2afe45aSNate Lawson } 1167a2afe45aSNate Lawson 11686b74f9b7SNate Lawson /* 1169a2afe45aSNate Lawson * Read from P_LVLx to enter C2(+), checking time spent asleep. 11706b74f9b7SNate Lawson * Use the ACPI timer for measuring sleep time. Since we need to 11716b74f9b7SNate Lawson * get the time very close to the CPU start/stop clock logic, this 11726b74f9b7SNate Lawson * is the only reliable time source. 11736b74f9b7SNate Lawson */ 11743c5c5559SAlexander Motin if (cx_next->type == ACPI_STATE_C3) { 11752f6a1a81SJung-uk Kim AcpiGetTimer(&start_time); 11762cee045bSAlexander Motin start_ticks = 0; 11773c5c5559SAlexander Motin } else { 11783c5c5559SAlexander Motin start_time = 0; 11792cee045bSAlexander Motin start_ticks = cpu_ticks(); 11803c5c5559SAlexander Motin } 1181075e4807SAlexander Motin if (cx_next->do_mwait) { 1182b57a73f8SKonstantin Belousov acpi_cpu_idle_mwait(cx_next->mwait_hint); 1183075e4807SAlexander Motin } else { 11846b74f9b7SNate Lawson CPU_GET_REG(cx_next->p_lvlx, 1); 11856b74f9b7SNate Lawson /* 11866b74f9b7SNate Lawson * Read the end time twice. Since it may take an arbitrary time 11876b74f9b7SNate Lawson * to enter the idle state, the first read may be executed before 11886b74f9b7SNate Lawson * the processor has stopped. Doing it again provides enough 11896b74f9b7SNate Lawson * margin that we are certain to have a correct value. 11906b74f9b7SNate Lawson */ 11912f6a1a81SJung-uk Kim AcpiGetTimer(&end_time); 1192075e4807SAlexander Motin } 1193075e4807SAlexander Motin 11942cee045bSAlexander Motin if (cx_next->type == ACPI_STATE_C3) 11952f6a1a81SJung-uk Kim AcpiGetTimer(&end_time); 11962cee045bSAlexander Motin else 11972cee045bSAlexander Motin end_ticks = cpu_ticks(); 11986b74f9b7SNate Lawson 11996b74f9b7SNate Lawson /* Enable bus master arbitration and disable bus master wakeup. */ 120045521967SAlexander Motin if (cx_next->type == ACPI_STATE_C3 && 120118ececa0SNate Lawson (cpu_quirks & CPU_QUIRK_NO_BM_CTRL) == 0) { 1202129d3046SJung-uk Kim AcpiWriteBitRegister(ACPI_BITREG_ARB_DISABLE, 0); 1203129d3046SJung-uk Kim AcpiWriteBitRegister(ACPI_BITREG_BUS_MASTER_RLD, 0); 12046b74f9b7SNate Lawson } 120580f006a1SNate Lawson ACPI_ENABLE_IRQS(); 12066b74f9b7SNate Lawson 12072cee045bSAlexander Motin if (cx_next->type == ACPI_STATE_C3) 12082cee045bSAlexander Motin AcpiGetTimerDuration(start_time, end_time, &end_time); 12092cee045bSAlexander Motin else 12102cee045bSAlexander Motin end_time = ((end_ticks - start_ticks) << 20) / cpu_tickrate(); 12112cee045bSAlexander Motin sc->cpu_prev_sleep = (sc->cpu_prev_sleep * 3 + end_time) / 4; 12126b74f9b7SNate Lawson } 1213617994efSAndrew Turner #endif 12146b74f9b7SNate Lawson 12156b74f9b7SNate Lawson /* 12168b888c66SNate Lawson * Re-evaluate the _CST object when we are notified that it changed. 12176b74f9b7SNate Lawson */ 12186b74f9b7SNate Lawson static void 12196b74f9b7SNate Lawson acpi_cpu_notify(ACPI_HANDLE h, UINT32 notify, void *context) 12206b74f9b7SNate Lawson { 12216b74f9b7SNate Lawson struct acpi_cpu_softc *sc = (struct acpi_cpu_softc *)context; 12226b74f9b7SNate Lawson 12238b888c66SNate Lawson if (notify != ACPI_NOTIFY_CX_STATES) 12248b888c66SNate Lawson return; 12258b888c66SNate Lawson 122630bf6110SAndriy Gapon /* 122730bf6110SAndriy Gapon * C-state data for target CPU is going to be in flux while we execute 122830bf6110SAndriy Gapon * acpi_cpu_cx_cst, so disable entering acpi_cpu_idle. 122930bf6110SAndriy Gapon * Also, it may happen that multiple ACPI taskqueues may concurrently 123030bf6110SAndriy Gapon * execute notifications for the same CPU. ACPI_SERIAL is used to 123130bf6110SAndriy Gapon * protect against that. 123230bf6110SAndriy Gapon */ 123330bf6110SAndriy Gapon ACPI_SERIAL_BEGIN(cpu); 123430bf6110SAndriy Gapon disable_idle(sc); 123530bf6110SAndriy Gapon 123689ab2a7aSRui Paulo /* Update the list of Cx states. */ 123789ab2a7aSRui Paulo acpi_cpu_cx_cst(sc); 123889ab2a7aSRui Paulo acpi_cpu_cx_list(sc); 1239d30b88afSAndriy Gapon acpi_cpu_set_cx_lowest(sc); 124030bf6110SAndriy Gapon 124130bf6110SAndriy Gapon enable_idle(sc); 124289ab2a7aSRui Paulo ACPI_SERIAL_END(cpu); 1243154fc7b6SAndriy Gapon 1244154fc7b6SAndriy Gapon acpi_UserNotify("PROCESSOR", sc->cpu_handle, notify); 12456b74f9b7SNate Lawson } 12466b74f9b7SNate Lawson 12479cf4cabeSJung-uk Kim static void 1248907b6777SNate Lawson acpi_cpu_quirks(void) 12496b74f9b7SNate Lawson { 12507826bf98SNate Lawson ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 12517826bf98SNate Lawson 12526b74f9b7SNate Lawson /* 1253907b6777SNate Lawson * Bus mastering arbitration control is needed to keep caches coherent 1254907b6777SNate Lawson * while sleeping in C3. If it's not present but a working flush cache 1255907b6777SNate Lawson * instruction is present, flush the caches before entering C3 instead. 1256907b6777SNate Lawson * Otherwise, just disable C3 completely. 12576b74f9b7SNate Lawson */ 12582be4e471SJung-uk Kim if (AcpiGbl_FADT.Pm2ControlBlock == 0 || 12592be4e471SJung-uk Kim AcpiGbl_FADT.Pm2ControlLength == 0) { 12602be4e471SJung-uk Kim if ((AcpiGbl_FADT.Flags & ACPI_FADT_WBINVD) && 12612be4e471SJung-uk Kim (AcpiGbl_FADT.Flags & ACPI_FADT_WBINVD_FLUSH) == 0) { 1262907b6777SNate Lawson cpu_quirks |= CPU_QUIRK_NO_BM_CTRL; 1263907b6777SNate Lawson ACPI_DEBUG_PRINT((ACPI_DB_INFO, 126430dd6af3SNate Lawson "acpi_cpu: no BM control, using flush cache method\n")); 1265907b6777SNate Lawson } else { 1266907b6777SNate Lawson cpu_quirks |= CPU_QUIRK_NO_C3; 1267907b6777SNate Lawson ACPI_DEBUG_PRINT((ACPI_DB_INFO, 126830dd6af3SNate Lawson "acpi_cpu: no BM control, C3 not available\n")); 1269907b6777SNate Lawson } 1270907b6777SNate Lawson } 1271907b6777SNate Lawson 1272907b6777SNate Lawson /* 1273907b6777SNate Lawson * If we are using generic Cx mode, C3 on multiple CPUs requires using 1274907b6777SNate Lawson * the expensive flush cache instruction. 1275907b6777SNate Lawson */ 127630dd6af3SNate Lawson if (cpu_cx_generic && mp_ncpus > 1) { 127718ececa0SNate Lawson cpu_quirks |= CPU_QUIRK_NO_BM_CTRL; 127830dd6af3SNate Lawson ACPI_DEBUG_PRINT((ACPI_DB_INFO, 127930dd6af3SNate Lawson "acpi_cpu: SMP, using flush cache mode for C3\n")); 128030dd6af3SNate Lawson } 12816b74f9b7SNate Lawson 12826b74f9b7SNate Lawson /* Look for various quirks of the PIIX4 part. */ 12839cf4cabeSJung-uk Kim acpi_cpu_quirks_piix4(); 12849cf4cabeSJung-uk Kim } 12859cf4cabeSJung-uk Kim 12869cf4cabeSJung-uk Kim static void 12879cf4cabeSJung-uk Kim acpi_cpu_quirks_piix4(void) 12889cf4cabeSJung-uk Kim { 12899cf4cabeSJung-uk Kim #ifdef __i386__ 12909cf4cabeSJung-uk Kim device_t acpi_dev; 12919cf4cabeSJung-uk Kim uint32_t val; 12929ae8e006SJung-uk Kim ACPI_STATUS status; 12939cf4cabeSJung-uk Kim 12946b74f9b7SNate Lawson acpi_dev = pci_find_device(PCI_VENDOR_INTEL, PCI_DEVICE_82371AB_3); 12956b74f9b7SNate Lawson if (acpi_dev != NULL) { 12966b74f9b7SNate Lawson switch (pci_get_revid(acpi_dev)) { 12976b74f9b7SNate Lawson /* 12986b74f9b7SNate Lawson * Disable C3 support for all PIIX4 chipsets. Some of these parts 12996b74f9b7SNate Lawson * do not report the BMIDE status to the BM status register and 13006b74f9b7SNate Lawson * others have a livelock bug if Type-F DMA is enabled. Linux 13016b74f9b7SNate Lawson * works around the BMIDE bug by reading the BM status directly 13026b74f9b7SNate Lawson * but we take the simpler approach of disabling C3 for these 13036b74f9b7SNate Lawson * parts. 13046b74f9b7SNate Lawson * 13056b74f9b7SNate Lawson * See erratum #18 ("C3 Power State/BMIDE and Type-F DMA 13066b74f9b7SNate Lawson * Livelock") from the January 2002 PIIX4 specification update. 13076b74f9b7SNate Lawson * Applies to all PIIX4 models. 13088a000acaSRui Paulo * 13098a000acaSRui Paulo * Also, make sure that all interrupts cause a "Stop Break" 13108a000acaSRui Paulo * event to exit from C2 state. 1311f1e1ddc3SAndriy Gapon * Also, BRLD_EN_BM (ACPI_BITREG_BUS_MASTER_RLD in ACPI-speak) 1312f1e1ddc3SAndriy Gapon * should be set to zero, otherwise it causes C2 to short-sleep. 1313f1e1ddc3SAndriy Gapon * PIIX4 doesn't properly support C3 and bus master activity 1314f1e1ddc3SAndriy Gapon * need not break out of C2. 13156b74f9b7SNate Lawson */ 13168a000acaSRui Paulo case PCI_REVISION_A_STEP: 13178a000acaSRui Paulo case PCI_REVISION_B_STEP: 13186b74f9b7SNate Lawson case PCI_REVISION_4E: 13196b74f9b7SNate Lawson case PCI_REVISION_4M: 13206b74f9b7SNate Lawson cpu_quirks |= CPU_QUIRK_NO_C3; 132130dd6af3SNate Lawson ACPI_DEBUG_PRINT((ACPI_DB_INFO, 132230dd6af3SNate Lawson "acpi_cpu: working around PIIX4 bug, disabling C3\n")); 13238a000acaSRui Paulo 13248a000acaSRui Paulo val = pci_read_config(acpi_dev, PIIX4_DEVACTB_REG, 4); 13258a000acaSRui Paulo if ((val & PIIX4_STOP_BREAK_MASK) != PIIX4_STOP_BREAK_MASK) { 13268a000acaSRui Paulo ACPI_DEBUG_PRINT((ACPI_DB_INFO, 1327f1e1ddc3SAndriy Gapon "acpi_cpu: PIIX4: enabling IRQs to generate Stop Break\n")); 13288a000acaSRui Paulo val |= PIIX4_STOP_BREAK_MASK; 13298a000acaSRui Paulo pci_write_config(acpi_dev, PIIX4_DEVACTB_REG, val, 4); 13308a000acaSRui Paulo } 13319ae8e006SJung-uk Kim status = AcpiReadBitRegister(ACPI_BITREG_BUS_MASTER_RLD, &val); 13329ae8e006SJung-uk Kim if (ACPI_SUCCESS(status) && val != 0) { 1333f1e1ddc3SAndriy Gapon ACPI_DEBUG_PRINT((ACPI_DB_INFO, 1334f1e1ddc3SAndriy Gapon "acpi_cpu: PIIX4: reset BRLD_EN_BM\n")); 1335129d3046SJung-uk Kim AcpiWriteBitRegister(ACPI_BITREG_BUS_MASTER_RLD, 0); 1336f1e1ddc3SAndriy Gapon } 13376b74f9b7SNate Lawson break; 13386b74f9b7SNate Lawson default: 13396b74f9b7SNate Lawson break; 13406b74f9b7SNate Lawson } 13416b74f9b7SNate Lawson } 13429cf4cabeSJung-uk Kim #endif 13436b74f9b7SNate Lawson } 13446b74f9b7SNate Lawson 13456b74f9b7SNate Lawson static int 1346a2afe45aSNate Lawson acpi_cpu_usage_sysctl(SYSCTL_HANDLER_ARGS) 13476b74f9b7SNate Lawson { 1348907b6777SNate Lawson struct acpi_cpu_softc *sc; 13496b74f9b7SNate Lawson struct sbuf sb; 13506b74f9b7SNate Lawson char buf[128]; 13516b74f9b7SNate Lawson int i; 13524a03551dSNate Lawson uintmax_t fract, sum, whole; 13536b74f9b7SNate Lawson 1354907b6777SNate Lawson sc = (struct acpi_cpu_softc *) arg1; 13553e7fa136SNate Lawson sum = 0; 1356907b6777SNate Lawson for (i = 0; i < sc->cpu_cx_count; i++) 1357907b6777SNate Lawson sum += sc->cpu_cx_stats[i]; 13586b74f9b7SNate Lawson sbuf_new(&sb, buf, sizeof(buf), SBUF_FIXEDLEN); 1359907b6777SNate Lawson for (i = 0; i < sc->cpu_cx_count; i++) { 13603e7fa136SNate Lawson if (sum > 0) { 1361907b6777SNate Lawson whole = (uintmax_t)sc->cpu_cx_stats[i] * 100; 13623e7fa136SNate Lawson fract = (whole % sum) * 100; 13633e7fa136SNate Lawson sbuf_printf(&sb, "%u.%02u%% ", (u_int)(whole / sum), 13643e7fa136SNate Lawson (u_int)(fract / sum)); 13653e7fa136SNate Lawson } else 13662500b6d9SAlexander Motin sbuf_printf(&sb, "0.00%% "); 13673e7fa136SNate Lawson } 13682500b6d9SAlexander Motin sbuf_printf(&sb, "last %dus", sc->cpu_prev_sleep); 13696b74f9b7SNate Lawson sbuf_trim(&sb); 13706b74f9b7SNate Lawson sbuf_finish(&sb); 1371ccc09458SNate Lawson sysctl_handle_string(oidp, sbuf_data(&sb), sbuf_len(&sb), req); 1372ccc09458SNate Lawson sbuf_delete(&sb); 13736b74f9b7SNate Lawson 13746b74f9b7SNate Lawson return (0); 13756b74f9b7SNate Lawson } 13766b74f9b7SNate Lawson 13770d470054SAdrian Chadd /* 13780d470054SAdrian Chadd * XXX TODO: actually add support to count each entry/exit 13790d470054SAdrian Chadd * from the Cx states. 13800d470054SAdrian Chadd */ 13810d470054SAdrian Chadd static int 13820d470054SAdrian Chadd acpi_cpu_usage_counters_sysctl(SYSCTL_HANDLER_ARGS) 13830d470054SAdrian Chadd { 13840d470054SAdrian Chadd struct acpi_cpu_softc *sc; 13850d470054SAdrian Chadd struct sbuf sb; 13860d470054SAdrian Chadd char buf[128]; 13870d470054SAdrian Chadd int i; 13880d470054SAdrian Chadd 13890d470054SAdrian Chadd sc = (struct acpi_cpu_softc *) arg1; 13900d470054SAdrian Chadd 13910d470054SAdrian Chadd /* Print out the raw counters */ 13920d470054SAdrian Chadd sbuf_new(&sb, buf, sizeof(buf), SBUF_FIXEDLEN); 13930d470054SAdrian Chadd 13940d470054SAdrian Chadd for (i = 0; i < sc->cpu_cx_count; i++) { 13950d470054SAdrian Chadd sbuf_printf(&sb, "%u ", sc->cpu_cx_stats[i]); 13960d470054SAdrian Chadd } 13970d470054SAdrian Chadd 13980d470054SAdrian Chadd sbuf_trim(&sb); 13990d470054SAdrian Chadd sbuf_finish(&sb); 14000d470054SAdrian Chadd sysctl_handle_string(oidp, sbuf_data(&sb), sbuf_len(&sb), req); 14010d470054SAdrian Chadd sbuf_delete(&sb); 14020d470054SAdrian Chadd 14030d470054SAdrian Chadd return (0); 14040d470054SAdrian Chadd } 14050d470054SAdrian Chadd 1406b57a73f8SKonstantin Belousov #if defined(__i386__) || defined(__amd64__) 1407b57a73f8SKonstantin Belousov static int 1408b57a73f8SKonstantin Belousov acpi_cpu_method_sysctl(SYSCTL_HANDLER_ARGS) 1409b57a73f8SKonstantin Belousov { 1410b57a73f8SKonstantin Belousov struct acpi_cpu_softc *sc; 1411b57a73f8SKonstantin Belousov struct acpi_cx *cx; 1412b57a73f8SKonstantin Belousov struct sbuf sb; 1413b57a73f8SKonstantin Belousov char buf[128]; 1414b57a73f8SKonstantin Belousov int i; 1415b57a73f8SKonstantin Belousov 1416b57a73f8SKonstantin Belousov sc = (struct acpi_cpu_softc *)arg1; 1417b57a73f8SKonstantin Belousov sbuf_new(&sb, buf, sizeof(buf), SBUF_FIXEDLEN); 1418b57a73f8SKonstantin Belousov for (i = 0; i < sc->cpu_cx_count; i++) { 1419b57a73f8SKonstantin Belousov cx = &sc->cpu_cx_states[i]; 1420b57a73f8SKonstantin Belousov sbuf_printf(&sb, "C%d/", i + 1); 1421b57a73f8SKonstantin Belousov if (cx->do_mwait) { 1422b57a73f8SKonstantin Belousov sbuf_cat(&sb, "mwait"); 1423b57a73f8SKonstantin Belousov if (cx->mwait_hw_coord) 1424b57a73f8SKonstantin Belousov sbuf_cat(&sb, "/hwc"); 1425b57a73f8SKonstantin Belousov if (cx->mwait_bm_avoidance) 1426b57a73f8SKonstantin Belousov sbuf_cat(&sb, "/bma"); 1427b57a73f8SKonstantin Belousov } else if (cx->type == ACPI_STATE_C1) { 1428b57a73f8SKonstantin Belousov sbuf_cat(&sb, "hlt"); 1429b57a73f8SKonstantin Belousov } else { 1430b57a73f8SKonstantin Belousov sbuf_cat(&sb, "io"); 1431b57a73f8SKonstantin Belousov } 1432b57a73f8SKonstantin Belousov if (cx->type == ACPI_STATE_C1 && cx->p_lvlx != NULL) 1433b57a73f8SKonstantin Belousov sbuf_cat(&sb, "/iohlt"); 1434b57a73f8SKonstantin Belousov sbuf_putc(&sb, ' '); 1435b57a73f8SKonstantin Belousov } 1436b57a73f8SKonstantin Belousov sbuf_trim(&sb); 1437b57a73f8SKonstantin Belousov sbuf_finish(&sb); 1438b57a73f8SKonstantin Belousov sysctl_handle_string(oidp, sbuf_data(&sb), sbuf_len(&sb), req); 1439b57a73f8SKonstantin Belousov sbuf_delete(&sb); 1440b57a73f8SKonstantin Belousov return (0); 1441b57a73f8SKonstantin Belousov } 1442b57a73f8SKonstantin Belousov #endif 1443b57a73f8SKonstantin Belousov 14446b74f9b7SNate Lawson static int 1445d30b88afSAndriy Gapon acpi_cpu_set_cx_lowest(struct acpi_cpu_softc *sc) 14466b74f9b7SNate Lawson { 1447b13cf774SNate Lawson int i; 14486b74f9b7SNate Lawson 1449b13cf774SNate Lawson ACPI_SERIAL_ASSERT(cpu); 1450d30b88afSAndriy Gapon sc->cpu_cx_lowest = min(sc->cpu_cx_lowest_lim, sc->cpu_cx_count - 1); 1451907b6777SNate Lawson 1452907b6777SNate Lawson /* If not disabling, cache the new lowest non-C3 state. */ 1453907b6777SNate Lawson sc->cpu_non_c3 = 0; 1454907b6777SNate Lawson for (i = sc->cpu_cx_lowest; i >= 0; i--) { 1455907b6777SNate Lawson if (sc->cpu_cx_states[i].type < ACPI_STATE_C3) { 1456907b6777SNate Lawson sc->cpu_non_c3 = i; 1457907b6777SNate Lawson break; 1458907b6777SNate Lawson } 1459907b6777SNate Lawson } 1460907b6777SNate Lawson 1461907b6777SNate Lawson /* Reset the statistics counters. */ 1462907b6777SNate Lawson bzero(sc->cpu_cx_stats, sizeof(sc->cpu_cx_stats)); 1463b13cf774SNate Lawson return (0); 1464b13cf774SNate Lawson } 1465b13cf774SNate Lawson 1466b13cf774SNate Lawson static int 1467b13cf774SNate Lawson acpi_cpu_cx_lowest_sysctl(SYSCTL_HANDLER_ARGS) 1468b13cf774SNate Lawson { 1469b13cf774SNate Lawson struct acpi_cpu_softc *sc; 1470b13cf774SNate Lawson char state[8]; 1471b13cf774SNate Lawson int val, error; 1472b13cf774SNate Lawson 1473b13cf774SNate Lawson sc = (struct acpi_cpu_softc *) arg1; 1474d30b88afSAndriy Gapon snprintf(state, sizeof(state), "C%d", sc->cpu_cx_lowest_lim + 1); 1475b13cf774SNate Lawson error = sysctl_handle_string(oidp, state, sizeof(state), req); 1476b13cf774SNate Lawson if (error != 0 || req->newptr == NULL) 1477b13cf774SNate Lawson return (error); 1478b13cf774SNate Lawson if (strlen(state) < 2 || toupper(state[0]) != 'C') 1479b13cf774SNate Lawson return (EINVAL); 1480d30b88afSAndriy Gapon if (strcasecmp(state, "Cmax") == 0) 1481d30b88afSAndriy Gapon val = MAX_CX_STATES; 1482d30b88afSAndriy Gapon else { 1483d30b88afSAndriy Gapon val = (int) strtol(state + 1, NULL, 10); 1484d30b88afSAndriy Gapon if (val < 1 || val > MAX_CX_STATES) 1485b13cf774SNate Lawson return (EINVAL); 1486d30b88afSAndriy Gapon } 1487b13cf774SNate Lawson 1488b13cf774SNate Lawson ACPI_SERIAL_BEGIN(cpu); 1489d30b88afSAndriy Gapon sc->cpu_cx_lowest_lim = val - 1; 1490d30b88afSAndriy Gapon acpi_cpu_set_cx_lowest(sc); 1491907b6777SNate Lawson ACPI_SERIAL_END(cpu); 1492907b6777SNate Lawson 149355fb7f36SSean Bruno return (0); 1494907b6777SNate Lawson } 1495907b6777SNate Lawson 1496907b6777SNate Lawson static int 1497907b6777SNate Lawson acpi_cpu_global_cx_lowest_sysctl(SYSCTL_HANDLER_ARGS) 1498907b6777SNate Lawson { 1499907b6777SNate Lawson struct acpi_cpu_softc *sc; 1500907b6777SNate Lawson char state[8]; 1501b13cf774SNate Lawson int val, error, i; 1502907b6777SNate Lawson 1503d30b88afSAndriy Gapon snprintf(state, sizeof(state), "C%d", cpu_cx_lowest_lim + 1); 1504ccc09458SNate Lawson error = sysctl_handle_string(oidp, state, sizeof(state), req); 15056b74f9b7SNate Lawson if (error != 0 || req->newptr == NULL) 15066b74f9b7SNate Lawson return (error); 1507ccc09458SNate Lawson if (strlen(state) < 2 || toupper(state[0]) != 'C') 1508ccc09458SNate Lawson return (EINVAL); 1509d30b88afSAndriy Gapon if (strcasecmp(state, "Cmax") == 0) 1510d30b88afSAndriy Gapon val = MAX_CX_STATES; 1511d30b88afSAndriy Gapon else { 1512d30b88afSAndriy Gapon val = (int) strtol(state + 1, NULL, 10); 1513d30b88afSAndriy Gapon if (val < 1 || val > MAX_CX_STATES) 15146b74f9b7SNate Lawson return (EINVAL); 1515d30b88afSAndriy Gapon } 15166b74f9b7SNate Lawson 1517b13cf774SNate Lawson /* Update the new lowest useable Cx state for all CPUs. */ 1518907b6777SNate Lawson ACPI_SERIAL_BEGIN(cpu); 1519d30b88afSAndriy Gapon cpu_cx_lowest_lim = val - 1; 1520907b6777SNate Lawson for (i = 0; i < cpu_ndevices; i++) { 1521907b6777SNate Lawson sc = device_get_softc(cpu_devices[i]); 1522d30b88afSAndriy Gapon sc->cpu_cx_lowest_lim = cpu_cx_lowest_lim; 1523d30b88afSAndriy Gapon acpi_cpu_set_cx_lowest(sc); 1524907b6777SNate Lawson } 1525d92a2ebdSNate Lawson ACPI_SERIAL_END(cpu); 15266b74f9b7SNate Lawson 15276b74f9b7SNate Lawson return (0); 15286b74f9b7SNate Lawson } 1529