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 1176b74f9b7SNate Lawson #define PM_USEC(x) ((x) >> 2) /* ~4 clocks per usec (3.57955 Mhz) */ 118fec754d4SMike Smith 1198b888c66SNate Lawson #define ACPI_NOTIFY_CX_STATES 0x81 /* _CST changed. */ 120fec754d4SMike Smith 12118ececa0SNate Lawson #define CPU_QUIRK_NO_C3 (1<<0) /* C3-type states are not usable. */ 12218ececa0SNate Lawson #define CPU_QUIRK_NO_BM_CTRL (1<<2) /* No bus mastering control. */ 1236b74f9b7SNate Lawson 1246b74f9b7SNate Lawson #define PCI_VENDOR_INTEL 0x8086 1256b74f9b7SNate Lawson #define PCI_DEVICE_82371AB_3 0x7113 /* PIIX4 chipset for quirks. */ 1266b74f9b7SNate Lawson #define PCI_REVISION_A_STEP 0 1276b74f9b7SNate Lawson #define PCI_REVISION_B_STEP 1 1286b74f9b7SNate Lawson #define PCI_REVISION_4E 2 1296b74f9b7SNate Lawson #define PCI_REVISION_4M 3 1308a000acaSRui Paulo #define PIIX4_DEVACTB_REG 0x58 1318a000acaSRui Paulo #define PIIX4_BRLD_EN_IRQ0 (1<<0) 1328a000acaSRui Paulo #define PIIX4_BRLD_EN_IRQ (1<<1) 1338a000acaSRui Paulo #define PIIX4_BRLD_EN_IRQ8 (1<<5) 1348a000acaSRui Paulo #define PIIX4_STOP_BREAK_MASK (PIIX4_BRLD_EN_IRQ0 | PIIX4_BRLD_EN_IRQ | PIIX4_BRLD_EN_IRQ8) 1358a000acaSRui Paulo #define PIIX4_PCNTRL_BST_EN (1<<10) 1366b74f9b7SNate Lawson 137b57a73f8SKonstantin Belousov #define CST_FFH_VENDOR_INTEL 1 138b57a73f8SKonstantin Belousov #define CST_FFH_INTEL_CL_C1IO 1 139b57a73f8SKonstantin Belousov #define CST_FFH_INTEL_CL_MWAIT 2 140b57a73f8SKonstantin Belousov #define CST_FFH_MWAIT_HW_COORD 0x0001 141b57a73f8SKonstantin Belousov #define CST_FFH_MWAIT_BM_AVOID 0x0002 142b57a73f8SKonstantin Belousov 143e4cd9dcfSJohn Baldwin /* Allow users to ignore processor orders in MADT. */ 144e4cd9dcfSJohn Baldwin static int cpu_unordered; 145e4cd9dcfSJohn Baldwin SYSCTL_INT(_debug_acpi, OID_AUTO, cpu_unordered, CTLFLAG_RDTUN, 146e4cd9dcfSJohn Baldwin &cpu_unordered, 0, 147e4cd9dcfSJohn Baldwin "Do not use the MADT to match ACPI Processor objects to CPUs."); 148e4cd9dcfSJohn Baldwin 149c2641d23SRoger Pau Monné /* Knob to disable acpi_cpu devices */ 150c2641d23SRoger Pau Monné bool acpi_cpu_disabled = false; 151c2641d23SRoger Pau Monné 1526b74f9b7SNate Lawson /* Platform hardware resource information. */ 1536b74f9b7SNate Lawson static uint32_t cpu_smi_cmd; /* Value to write to SMI_CMD. */ 15456a70eadSNate Lawson static uint8_t cpu_cst_cnt; /* Indicate we are _CST aware. */ 155a2afe45aSNate Lawson static int cpu_quirks; /* Indicate any hardware bugs. */ 1566b74f9b7SNate Lawson 1576b74f9b7SNate Lawson /* Values for sysctl. */ 158907b6777SNate Lawson static struct sysctl_ctx_list cpu_sysctl_ctx; 159907b6777SNate Lawson static struct sysctl_oid *cpu_sysctl_tree; 160907b6777SNate Lawson static int cpu_cx_generic; 161d30b88afSAndriy Gapon static int cpu_cx_lowest_lim; 162fec754d4SMike Smith 163fec754d4SMike Smith static device_t *cpu_devices; 164fec754d4SMike Smith static int cpu_ndevices; 165447a5fa1SJohn Baldwin static struct acpi_cpu_softc **cpu_softc; 166d92a2ebdSNate Lawson ACPI_SERIAL_DECL(cpu, "ACPI CPU"); 167fec754d4SMike Smith 168fec754d4SMike Smith static int acpi_cpu_probe(device_t dev); 169fec754d4SMike Smith static int acpi_cpu_attach(device_t dev); 1703331373cSNate Lawson static int acpi_cpu_suspend(device_t dev); 1713331373cSNate Lawson static int acpi_cpu_resume(device_t dev); 172e4cd9dcfSJohn Baldwin static int acpi_pcpu_get_id(device_t dev, uint32_t *acpi_id, 173b6426963SNate Lawson uint32_t *cpu_id); 17498aa9cd0SNate Lawson static struct resource_list *acpi_cpu_get_rlist(device_t dev, device_t child); 1753d844eddSAndriy Gapon static device_t acpi_cpu_add_child(device_t dev, u_int order, const char *name, 17698aa9cd0SNate Lawson int unit); 17798aa9cd0SNate Lawson static int acpi_cpu_read_ivar(device_t dev, device_t child, int index, 17898aa9cd0SNate Lawson uintptr_t *result); 17956a70eadSNate Lawson static int acpi_cpu_shutdown(device_t dev); 180907b6777SNate Lawson static void acpi_cpu_cx_probe(struct acpi_cpu_softc *sc); 181907b6777SNate Lawson static void acpi_cpu_generic_cx_probe(struct acpi_cpu_softc *sc); 1826b74f9b7SNate Lawson static int acpi_cpu_cx_cst(struct acpi_cpu_softc *sc); 1836b74f9b7SNate Lawson static void acpi_cpu_startup(void *arg); 184907b6777SNate Lawson static void acpi_cpu_startup_cx(struct acpi_cpu_softc *sc); 18589ab2a7aSRui Paulo static void acpi_cpu_cx_list(struct acpi_cpu_softc *sc); 186acccf7d8SDavide Italiano static void acpi_cpu_idle(sbintime_t sbt); 1876b74f9b7SNate Lawson static void acpi_cpu_notify(ACPI_HANDLE h, UINT32 notify, void *context); 1889cf4cabeSJung-uk Kim static void acpi_cpu_quirks(void); 1899cf4cabeSJung-uk Kim static void acpi_cpu_quirks_piix4(void); 190a2afe45aSNate Lawson static int acpi_cpu_usage_sysctl(SYSCTL_HANDLER_ARGS); 1910d470054SAdrian Chadd static int acpi_cpu_usage_counters_sysctl(SYSCTL_HANDLER_ARGS); 192d30b88afSAndriy Gapon static int acpi_cpu_set_cx_lowest(struct acpi_cpu_softc *sc); 1936b74f9b7SNate Lawson static int acpi_cpu_cx_lowest_sysctl(SYSCTL_HANDLER_ARGS); 194907b6777SNate Lawson static int acpi_cpu_global_cx_lowest_sysctl(SYSCTL_HANDLER_ARGS); 195b57a73f8SKonstantin Belousov #if defined(__i386__) || defined(__amd64__) 196b57a73f8SKonstantin Belousov static int acpi_cpu_method_sysctl(SYSCTL_HANDLER_ARGS); 197b57a73f8SKonstantin Belousov #endif 198fec754d4SMike Smith 199fec754d4SMike Smith static device_method_t acpi_cpu_methods[] = { 200fec754d4SMike Smith /* Device interface */ 201fec754d4SMike Smith DEVMETHOD(device_probe, acpi_cpu_probe), 202fec754d4SMike Smith DEVMETHOD(device_attach, acpi_cpu_attach), 20398aa9cd0SNate Lawson DEVMETHOD(device_detach, bus_generic_detach), 20456a70eadSNate Lawson DEVMETHOD(device_shutdown, acpi_cpu_shutdown), 2053331373cSNate Lawson DEVMETHOD(device_suspend, acpi_cpu_suspend), 2063331373cSNate Lawson DEVMETHOD(device_resume, acpi_cpu_resume), 20798aa9cd0SNate Lawson 20898aa9cd0SNate Lawson /* Bus interface */ 20998aa9cd0SNate Lawson DEVMETHOD(bus_add_child, acpi_cpu_add_child), 21098aa9cd0SNate Lawson DEVMETHOD(bus_read_ivar, acpi_cpu_read_ivar), 21198aa9cd0SNate Lawson DEVMETHOD(bus_get_resource_list, acpi_cpu_get_rlist), 21298aa9cd0SNate Lawson DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource), 21398aa9cd0SNate Lawson DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource), 21498aa9cd0SNate Lawson DEVMETHOD(bus_alloc_resource, bus_generic_rl_alloc_resource), 21598aa9cd0SNate Lawson DEVMETHOD(bus_release_resource, bus_generic_rl_release_resource), 21698aa9cd0SNate Lawson DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 21798aa9cd0SNate Lawson DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 21898aa9cd0SNate Lawson DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 21998aa9cd0SNate Lawson DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 220fec754d4SMike Smith 2214b7ec270SMarius Strobl DEVMETHOD_END 222fec754d4SMike Smith }; 223fec754d4SMike Smith 224fec754d4SMike Smith static driver_t acpi_cpu_driver = { 225b0e2b625SNate Lawson "cpu", 226fec754d4SMike Smith acpi_cpu_methods, 227fec754d4SMike Smith sizeof(struct acpi_cpu_softc), 228fec754d4SMike Smith }; 229fec754d4SMike Smith 2303045c8afSNate Lawson static devclass_t acpi_cpu_devclass; 2313045c8afSNate Lawson DRIVER_MODULE(cpu, acpi, acpi_cpu_driver, acpi_cpu_devclass, 0, 0); 232b0e2b625SNate Lawson MODULE_DEPEND(cpu, acpi, 1, 1, 1); 23356a70eadSNate Lawson 234fec754d4SMike Smith static int 235fec754d4SMike Smith acpi_cpu_probe(device_t dev) 236fec754d4SMike Smith { 237b29224c2SNate Lawson int acpi_id, cpu_id; 238b0e2b625SNate Lawson ACPI_BUFFER buf; 239b0e2b625SNate Lawson ACPI_HANDLE handle; 240b0e2b625SNate Lawson ACPI_OBJECT *obj; 241b0e2b625SNate Lawson ACPI_STATUS status; 242b0e2b625SNate Lawson 243c2641d23SRoger Pau Monné if (acpi_disabled("cpu") || acpi_get_type(dev) != ACPI_TYPE_PROCESSOR || 244c2641d23SRoger Pau Monné acpi_cpu_disabled) 245b0e2b625SNate Lawson return (ENXIO); 246b0e2b625SNate Lawson 247b0e2b625SNate Lawson handle = acpi_get_handle(dev); 248447a5fa1SJohn Baldwin if (cpu_softc == NULL) 249447a5fa1SJohn Baldwin cpu_softc = malloc(sizeof(struct acpi_cpu_softc *) * 250447a5fa1SJohn Baldwin (mp_maxid + 1), M_TEMP /* XXX */, M_WAITOK | M_ZERO); 251b0e2b625SNate Lawson 252b0e2b625SNate Lawson /* Get our Processor object. */ 253b0e2b625SNate Lawson buf.Pointer = NULL; 254b0e2b625SNate Lawson buf.Length = ACPI_ALLOCATE_BUFFER; 255b0e2b625SNate Lawson status = AcpiEvaluateObject(handle, NULL, NULL, &buf); 256b0e2b625SNate Lawson if (ACPI_FAILURE(status)) { 257b0e2b625SNate Lawson device_printf(dev, "probe failed to get Processor obj - %s\n", 258b0e2b625SNate Lawson AcpiFormatException(status)); 259b0e2b625SNate Lawson return (ENXIO); 260b0e2b625SNate Lawson } 261b0e2b625SNate Lawson obj = (ACPI_OBJECT *)buf.Pointer; 262b0e2b625SNate Lawson if (obj->Type != ACPI_TYPE_PROCESSOR) { 263b0e2b625SNate Lawson device_printf(dev, "Processor object has bad type %d\n", obj->Type); 264b0e2b625SNate Lawson AcpiOsFree(obj); 265b0e2b625SNate Lawson return (ENXIO); 266fec754d4SMike Smith } 267be2b1797SNate Lawson 268b0e2b625SNate Lawson /* 269b0e2b625SNate Lawson * Find the processor associated with our unit. We could use the 270b0e2b625SNate Lawson * ProcId as a key, however, some boxes do not have the same values 271b0e2b625SNate Lawson * in their Processor object as the ProcId values in the MADT. 272b0e2b625SNate Lawson */ 273b0e2b625SNate Lawson acpi_id = obj->Processor.ProcId; 274b0e2b625SNate Lawson AcpiOsFree(obj); 275e4cd9dcfSJohn Baldwin if (acpi_pcpu_get_id(dev, &acpi_id, &cpu_id) != 0) 276fec754d4SMike Smith return (ENXIO); 277b0e2b625SNate Lawson 278b0e2b625SNate Lawson /* 279b0e2b625SNate Lawson * Check if we already probed this processor. We scan the bus twice 280b0e2b625SNate Lawson * so it's possible we've already seen this one. 281b0e2b625SNate Lawson */ 282b0e2b625SNate Lawson if (cpu_softc[cpu_id] != NULL) 283b0e2b625SNate Lawson return (ENXIO); 284b0e2b625SNate Lawson 285b0e2b625SNate Lawson /* Mark this processor as in-use and save our derived id for attach. */ 286b0e2b625SNate Lawson cpu_softc[cpu_id] = (void *)1; 287f6eb382cSAndriy Gapon acpi_set_private(dev, (void*)(intptr_t)cpu_id); 288b29224c2SNate Lawson device_set_desc(dev, "ACPI CPU"); 289b0e2b625SNate Lawson 290b0e2b625SNate Lawson return (0); 291fec754d4SMike Smith } 292fec754d4SMike Smith 293fec754d4SMike Smith static int 294fec754d4SMike Smith acpi_cpu_attach(device_t dev) 295fec754d4SMike Smith { 296b0e2b625SNate Lawson ACPI_BUFFER buf; 297c961facaSNate Lawson ACPI_OBJECT arg[4], *obj; 298bce92885SNate Lawson ACPI_OBJECT_LIST arglist; 29998aa9cd0SNate Lawson struct pcpu *pcpu_data; 300fec754d4SMike Smith struct acpi_cpu_softc *sc; 301fec754d4SMike Smith struct acpi_softc *acpi_sc; 302fec754d4SMike Smith ACPI_STATUS status; 303b29224c2SNate Lawson u_int features; 304b29224c2SNate Lawson int cpu_id, drv_count, i; 305b29224c2SNate Lawson driver_t **drivers; 306bce92885SNate Lawson uint32_t cap_set[3]; 307fec754d4SMike Smith 308c961facaSNate Lawson /* UUID needed by _OSC evaluation */ 309c961facaSNate Lawson static uint8_t cpu_oscuuid[16] = { 0x16, 0xA6, 0x77, 0x40, 0x0C, 0x29, 310c961facaSNate Lawson 0xBE, 0x47, 0x9E, 0xBD, 0xD8, 0x70, 311c961facaSNate Lawson 0x58, 0x71, 0x39, 0x53 }; 312c961facaSNate Lawson 313b4a05238SPeter Wemm ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 314fec754d4SMike Smith 315fec754d4SMike Smith sc = device_get_softc(dev); 316fec754d4SMike Smith sc->cpu_dev = dev; 317fec754d4SMike Smith sc->cpu_handle = acpi_get_handle(dev); 318f6eb382cSAndriy Gapon cpu_id = (int)(intptr_t)acpi_get_private(dev); 31998aa9cd0SNate Lawson cpu_softc[cpu_id] = sc; 32098aa9cd0SNate Lawson pcpu_data = pcpu_find(cpu_id); 32198aa9cd0SNate Lawson pcpu_data->pc_device = dev; 32298aa9cd0SNate Lawson sc->cpu_pcpu = pcpu_data; 3232be4e471SJung-uk Kim cpu_smi_cmd = AcpiGbl_FADT.SmiCommand; 3242be4e471SJung-uk Kim cpu_cst_cnt = AcpiGbl_FADT.CstControl; 325fec754d4SMike Smith 326b0e2b625SNate Lawson buf.Pointer = NULL; 327b0e2b625SNate Lawson buf.Length = ACPI_ALLOCATE_BUFFER; 3286b74f9b7SNate Lawson status = AcpiEvaluateObject(sc->cpu_handle, NULL, NULL, &buf); 3296b74f9b7SNate Lawson if (ACPI_FAILURE(status)) { 330b0e2b625SNate Lawson device_printf(dev, "attach failed to get Processor obj - %s\n", 3316b74f9b7SNate Lawson AcpiFormatException(status)); 3326b74f9b7SNate Lawson return (ENXIO); 333b0e2b625SNate Lawson } 334b0e2b625SNate Lawson obj = (ACPI_OBJECT *)buf.Pointer; 335b0e2b625SNate Lawson sc->cpu_p_blk = obj->Processor.PblkAddress; 336b0e2b625SNate Lawson sc->cpu_p_blk_len = obj->Processor.PblkLength; 33798aa9cd0SNate Lawson sc->cpu_acpi_id = obj->Processor.ProcId; 338b0e2b625SNate Lawson AcpiOsFree(obj); 33956a70eadSNate Lawson ACPI_DEBUG_PRINT((ACPI_DB_INFO, "acpi_cpu%d: P_BLK at %#x/%d\n", 34056a70eadSNate Lawson device_get_unit(dev), sc->cpu_p_blk, sc->cpu_p_blk_len)); 3416b74f9b7SNate Lawson 342907b6777SNate Lawson /* 343907b6777SNate Lawson * If this is the first cpu we attach, create and initialize the generic 344907b6777SNate Lawson * resources that will be used by all acpi cpu devices. 345907b6777SNate Lawson */ 346907b6777SNate Lawson if (device_get_unit(dev) == 0) { 347907b6777SNate Lawson /* Assume we won't be using generic Cx mode by default */ 348907b6777SNate Lawson cpu_cx_generic = FALSE; 349907b6777SNate Lawson 350907b6777SNate Lawson /* Install hw.acpi.cpu sysctl tree */ 351fec754d4SMike Smith acpi_sc = acpi_device_get_parent_softc(dev); 352907b6777SNate Lawson sysctl_ctx_init(&cpu_sysctl_ctx); 353907b6777SNate Lawson cpu_sysctl_tree = SYSCTL_ADD_NODE(&cpu_sysctl_ctx, 35498aa9cd0SNate Lawson SYSCTL_CHILDREN(acpi_sc->acpi_sysctl_tree), OID_AUTO, "cpu", 355907b6777SNate Lawson CTLFLAG_RD, 0, "node for CPU children"); 356907b6777SNate Lawson 357907b6777SNate Lawson /* Queue post cpu-probing task handler */ 3582be4e471SJung-uk Kim AcpiOsExecute(OSL_NOTIFY_HANDLER, acpi_cpu_startup, NULL); 359907b6777SNate Lawson } 360fec754d4SMike Smith 3616b74f9b7SNate Lawson /* 362b29224c2SNate Lawson * Before calling any CPU methods, collect child driver feature hints 363f2d94257SNate Lawson * and notify ACPI of them. We support unified SMP power control 364f2d94257SNate Lawson * so advertise this ourselves. Note this is not the same as independent 365f2d94257SNate Lawson * SMP control where each CPU can have different settings. 366b29224c2SNate Lawson */ 367b57a73f8SKonstantin Belousov sc->cpu_features = ACPI_CAP_SMP_SAME | ACPI_CAP_SMP_SAME_C3 | 368b57a73f8SKonstantin Belousov ACPI_CAP_C1_IO_HALT; 369b57a73f8SKonstantin Belousov 370b57a73f8SKonstantin Belousov #if defined(__i386__) || defined(__amd64__) 371b57a73f8SKonstantin Belousov /* 372b57a73f8SKonstantin Belousov * Ask for MWAIT modes if not disabled and interrupts work 373b57a73f8SKonstantin Belousov * reasonable with MWAIT. 374b57a73f8SKonstantin Belousov */ 375b57a73f8SKonstantin Belousov if (!acpi_disabled("mwait") && cpu_mwait_usable()) 376b57a73f8SKonstantin Belousov sc->cpu_features |= ACPI_CAP_SMP_C1_NATIVE | ACPI_CAP_SMP_C3_NATIVE; 377b57a73f8SKonstantin Belousov #endif 378b57a73f8SKonstantin Belousov 379b29224c2SNate Lawson if (devclass_get_drivers(acpi_cpu_devclass, &drivers, &drv_count) == 0) { 380b29224c2SNate Lawson for (i = 0; i < drv_count; i++) { 381b29224c2SNate Lawson if (ACPI_GET_FEATURES(drivers[i], &features) == 0) 382b29224c2SNate Lawson sc->cpu_features |= features; 383b29224c2SNate Lawson } 384b29224c2SNate Lawson free(drivers, M_TEMP); 385b29224c2SNate Lawson } 386bce92885SNate Lawson 387bce92885SNate Lawson /* 388f4ab0cccSAndriy Gapon * CPU capabilities are specified in 389f4ab0cccSAndriy Gapon * Intel Processor Vendor-Specific ACPI Interface Specification. 390bce92885SNate Lawson */ 391bce92885SNate Lawson if (sc->cpu_features) { 392c961facaSNate Lawson arglist.Pointer = arg; 393c961facaSNate Lawson arglist.Count = 4; 394c961facaSNate Lawson arg[0].Type = ACPI_TYPE_BUFFER; 395c961facaSNate Lawson arg[0].Buffer.Length = sizeof(cpu_oscuuid); 396c961facaSNate Lawson arg[0].Buffer.Pointer = cpu_oscuuid; /* UUID */ 397c961facaSNate Lawson arg[1].Type = ACPI_TYPE_INTEGER; 398c961facaSNate Lawson arg[1].Integer.Value = 1; /* revision */ 399c961facaSNate Lawson arg[2].Type = ACPI_TYPE_INTEGER; 400c961facaSNate Lawson arg[2].Integer.Value = 1; /* count */ 401c961facaSNate Lawson arg[3].Type = ACPI_TYPE_BUFFER; 402c961facaSNate Lawson arg[3].Buffer.Length = sizeof(cap_set); /* Capabilities buffer */ 403c961facaSNate Lawson arg[3].Buffer.Pointer = (uint8_t *)cap_set; 404877a6d99SAndriy Gapon cap_set[0] = 0; /* status */ 405877a6d99SAndriy Gapon cap_set[1] = sc->cpu_features; 406f4ab0cccSAndriy Gapon status = AcpiEvaluateObject(sc->cpu_handle, "_OSC", &arglist, NULL); 407f4ab0cccSAndriy Gapon if (ACPI_SUCCESS(status)) { 408f4ab0cccSAndriy Gapon if (cap_set[0] != 0) 409f4ab0cccSAndriy Gapon device_printf(dev, "_OSC returned status %#x\n", cap_set[0]); 410f4ab0cccSAndriy Gapon } 411f4ab0cccSAndriy Gapon else { 412f4ab0cccSAndriy Gapon arglist.Pointer = arg; 413f4ab0cccSAndriy Gapon arglist.Count = 1; 414f4ab0cccSAndriy Gapon arg[0].Type = ACPI_TYPE_BUFFER; 415f4ab0cccSAndriy Gapon arg[0].Buffer.Length = sizeof(cap_set); 416f4ab0cccSAndriy Gapon arg[0].Buffer.Pointer = (uint8_t *)cap_set; 417f4ab0cccSAndriy Gapon cap_set[0] = 1; /* revision */ 418f4ab0cccSAndriy Gapon cap_set[1] = 1; /* number of capabilities integers */ 419f4ab0cccSAndriy Gapon cap_set[2] = sc->cpu_features; 420f4ab0cccSAndriy Gapon AcpiEvaluateObject(sc->cpu_handle, "_PDC", &arglist, NULL); 421f4ab0cccSAndriy Gapon } 422bce92885SNate Lawson } 423b29224c2SNate Lawson 424907b6777SNate Lawson /* Probe for Cx state support. */ 425907b6777SNate Lawson acpi_cpu_cx_probe(sc); 4266b74f9b7SNate Lawson 42798aa9cd0SNate Lawson return (0); 4286b74f9b7SNate Lawson } 4296b74f9b7SNate Lawson 430aa835160SAndriy Gapon static void 431aa835160SAndriy Gapon acpi_cpu_postattach(void *unused __unused) 432aa835160SAndriy Gapon { 433aa835160SAndriy Gapon device_t *devices; 434aa835160SAndriy Gapon int err; 435aa835160SAndriy Gapon int i, n; 436aa835160SAndriy Gapon 437aa835160SAndriy Gapon err = devclass_get_devices(acpi_cpu_devclass, &devices, &n); 438aa835160SAndriy Gapon if (err != 0) { 439aa835160SAndriy Gapon printf("devclass_get_devices(acpi_cpu_devclass) failed\n"); 440aa835160SAndriy Gapon return; 441aa835160SAndriy Gapon } 442aa835160SAndriy Gapon for (i = 0; i < n; i++) 443aa835160SAndriy Gapon bus_generic_probe(devices[i]); 444aa835160SAndriy Gapon for (i = 0; i < n; i++) 445aa835160SAndriy Gapon bus_generic_attach(devices[i]); 446aa835160SAndriy Gapon free(devices, M_TEMP); 447aa835160SAndriy Gapon } 448aa835160SAndriy Gapon 449aa835160SAndriy Gapon SYSINIT(acpi_cpu, SI_SUB_CONFIGURE, SI_ORDER_MIDDLE, 450aa835160SAndriy Gapon acpi_cpu_postattach, NULL); 451aa835160SAndriy Gapon 45209424d43SAndriy Gapon static void 45309424d43SAndriy Gapon disable_idle(struct acpi_cpu_softc *sc) 45409424d43SAndriy Gapon { 45509424d43SAndriy Gapon cpuset_t cpuset; 45609424d43SAndriy Gapon 45709424d43SAndriy Gapon CPU_SETOF(sc->cpu_pcpu->pc_cpuid, &cpuset); 45809424d43SAndriy Gapon sc->cpu_disable_idle = TRUE; 45909424d43SAndriy Gapon 46009424d43SAndriy Gapon /* 46109424d43SAndriy Gapon * Ensure that the CPU is not in idle state or in acpi_cpu_idle(). 46209424d43SAndriy Gapon * Note that this code depends on the fact that the rendezvous IPI 46309424d43SAndriy Gapon * can not penetrate context where interrupts are disabled and acpi_cpu_idle 46409424d43SAndriy Gapon * is called and executed in such a context with interrupts being re-enabled 46509424d43SAndriy Gapon * right before return. 46609424d43SAndriy Gapon */ 46709424d43SAndriy Gapon smp_rendezvous_cpus(cpuset, smp_no_rendevous_barrier, NULL, 46809424d43SAndriy Gapon smp_no_rendevous_barrier, NULL); 46909424d43SAndriy Gapon } 47009424d43SAndriy Gapon 47109424d43SAndriy Gapon static void 47209424d43SAndriy Gapon enable_idle(struct acpi_cpu_softc *sc) 47309424d43SAndriy Gapon { 47409424d43SAndriy Gapon 47509424d43SAndriy Gapon sc->cpu_disable_idle = FALSE; 47609424d43SAndriy Gapon } 47709424d43SAndriy Gapon 47809424d43SAndriy Gapon static int 47909424d43SAndriy Gapon is_idle_disabled(struct acpi_cpu_softc *sc) 48009424d43SAndriy Gapon { 48109424d43SAndriy Gapon 48209424d43SAndriy Gapon return (sc->cpu_disable_idle); 48309424d43SAndriy Gapon } 48409424d43SAndriy Gapon 485b6426963SNate Lawson /* 4863331373cSNate Lawson * Disable any entry to the idle function during suspend and re-enable it 4873331373cSNate Lawson * during resume. 4883331373cSNate Lawson */ 4893331373cSNate Lawson static int 4903331373cSNate Lawson acpi_cpu_suspend(device_t dev) 4913331373cSNate Lawson { 4923331373cSNate Lawson int error; 4933331373cSNate Lawson 4943331373cSNate Lawson error = bus_generic_suspend(dev); 4953331373cSNate Lawson if (error) 4963331373cSNate Lawson return (error); 49709424d43SAndriy Gapon disable_idle(device_get_softc(dev)); 4983331373cSNate Lawson return (0); 4993331373cSNate Lawson } 5003331373cSNate Lawson 5013331373cSNate Lawson static int 5023331373cSNate Lawson acpi_cpu_resume(device_t dev) 5033331373cSNate Lawson { 5043331373cSNate Lawson 50509424d43SAndriy Gapon enable_idle(device_get_softc(dev)); 5063331373cSNate Lawson return (bus_generic_resume(dev)); 5073331373cSNate Lawson } 5083331373cSNate Lawson 5093331373cSNate Lawson /* 510e4cd9dcfSJohn Baldwin * Find the processor associated with a given ACPI ID. By default, 511e4cd9dcfSJohn Baldwin * use the MADT to map ACPI IDs to APIC IDs and use that to locate a 512e4cd9dcfSJohn Baldwin * processor. Some systems have inconsistent ASL and MADT however. 513e4cd9dcfSJohn Baldwin * For these systems the cpu_unordered tunable can be set in which 514e4cd9dcfSJohn Baldwin * case we assume that Processor objects are listed in the same order 515e4cd9dcfSJohn Baldwin * in both the MADT and ASL. 516b6426963SNate Lawson */ 517b6426963SNate Lawson static int 518e4cd9dcfSJohn Baldwin acpi_pcpu_get_id(device_t dev, uint32_t *acpi_id, uint32_t *cpu_id) 519b6426963SNate Lawson { 520e4cd9dcfSJohn Baldwin struct pcpu *pc; 521e4cd9dcfSJohn Baldwin uint32_t i, idx; 522b6426963SNate Lawson 523b6426963SNate Lawson KASSERT(acpi_id != NULL, ("Null acpi_id")); 524b6426963SNate Lawson KASSERT(cpu_id != NULL, ("Null cpu_id")); 525e4cd9dcfSJohn Baldwin idx = device_get_unit(dev); 526e4cd9dcfSJohn Baldwin 527e4cd9dcfSJohn Baldwin /* 528e4cd9dcfSJohn Baldwin * If pc_acpi_id for CPU 0 is not initialized (e.g. a non-APIC 529e4cd9dcfSJohn Baldwin * UP box) use the ACPI ID from the first processor we find. 530e4cd9dcfSJohn Baldwin */ 531e4cd9dcfSJohn Baldwin if (idx == 0 && mp_ncpus == 1) { 532e4cd9dcfSJohn Baldwin pc = pcpu_find(0); 533e4cd9dcfSJohn Baldwin if (pc->pc_acpi_id == 0xffffffff) 534e4cd9dcfSJohn Baldwin pc->pc_acpi_id = *acpi_id; 535e4cd9dcfSJohn Baldwin *cpu_id = 0; 536e4cd9dcfSJohn Baldwin return (0); 537e4cd9dcfSJohn Baldwin } 538e4cd9dcfSJohn Baldwin 5393aa6d94eSJohn Baldwin CPU_FOREACH(i) { 540e4cd9dcfSJohn Baldwin pc = pcpu_find(i); 541e4cd9dcfSJohn Baldwin KASSERT(pc != NULL, ("no pcpu data for %d", i)); 542e4cd9dcfSJohn Baldwin if (cpu_unordered) { 543b6426963SNate Lawson if (idx-- == 0) { 544b6426963SNate Lawson /* 545e4cd9dcfSJohn Baldwin * If pc_acpi_id doesn't match the ACPI ID from the 546e4cd9dcfSJohn Baldwin * ASL, prefer the MADT-derived value. 547b6426963SNate Lawson */ 548e4cd9dcfSJohn Baldwin if (pc->pc_acpi_id != *acpi_id) 549e4cd9dcfSJohn Baldwin *acpi_id = pc->pc_acpi_id; 550e4cd9dcfSJohn Baldwin *cpu_id = pc->pc_cpuid; 551e4cd9dcfSJohn Baldwin return (0); 552e4cd9dcfSJohn Baldwin } 553e4cd9dcfSJohn Baldwin } else { 554e4cd9dcfSJohn Baldwin if (pc->pc_acpi_id == *acpi_id) { 555e4cd9dcfSJohn Baldwin if (bootverbose) 5562aa7a9e6SJung-uk Kim device_printf(dev, 5572aa7a9e6SJung-uk Kim "Processor %s (ACPI ID %u) -> APIC ID %d\n", 5582aa7a9e6SJung-uk Kim acpi_name(acpi_get_handle(dev)), *acpi_id, 5592aa7a9e6SJung-uk Kim pc->pc_cpuid); 560e4cd9dcfSJohn Baldwin *cpu_id = pc->pc_cpuid; 561b6426963SNate Lawson return (0); 562b6426963SNate Lawson } 563b6426963SNate Lawson } 564e4cd9dcfSJohn Baldwin } 565e4cd9dcfSJohn Baldwin 566e4cd9dcfSJohn Baldwin if (bootverbose) 567e4cd9dcfSJohn Baldwin printf("ACPI: Processor %s (ACPI ID %u) ignored\n", 568e4cd9dcfSJohn Baldwin acpi_name(acpi_get_handle(dev)), *acpi_id); 569b6426963SNate Lawson 570b6426963SNate Lawson return (ESRCH); 571b6426963SNate Lawson } 572b6426963SNate Lawson 57398aa9cd0SNate Lawson static struct resource_list * 57498aa9cd0SNate Lawson acpi_cpu_get_rlist(device_t dev, device_t child) 57598aa9cd0SNate Lawson { 57698aa9cd0SNate Lawson struct acpi_cpu_device *ad; 57798aa9cd0SNate Lawson 57898aa9cd0SNate Lawson ad = device_get_ivars(child); 57998aa9cd0SNate Lawson if (ad == NULL) 58098aa9cd0SNate Lawson return (NULL); 58198aa9cd0SNate Lawson return (&ad->ad_rl); 58298aa9cd0SNate Lawson } 58398aa9cd0SNate Lawson 58498aa9cd0SNate Lawson static device_t 5853d844eddSAndriy Gapon acpi_cpu_add_child(device_t dev, u_int order, const char *name, int unit) 58698aa9cd0SNate Lawson { 58798aa9cd0SNate Lawson struct acpi_cpu_device *ad; 58898aa9cd0SNate Lawson device_t child; 58998aa9cd0SNate Lawson 59098aa9cd0SNate Lawson if ((ad = malloc(sizeof(*ad), M_TEMP, M_NOWAIT | M_ZERO)) == NULL) 59198aa9cd0SNate Lawson return (NULL); 59298aa9cd0SNate Lawson 59398aa9cd0SNate Lawson resource_list_init(&ad->ad_rl); 59498aa9cd0SNate Lawson 59598aa9cd0SNate Lawson child = device_add_child_ordered(dev, order, name, unit); 59698aa9cd0SNate Lawson if (child != NULL) 59798aa9cd0SNate Lawson device_set_ivars(child, ad); 59843ce1c77SNate Lawson else 59943ce1c77SNate Lawson free(ad, M_TEMP); 60098aa9cd0SNate Lawson return (child); 60198aa9cd0SNate Lawson } 60298aa9cd0SNate Lawson 60398aa9cd0SNate Lawson static int 60498aa9cd0SNate Lawson acpi_cpu_read_ivar(device_t dev, device_t child, int index, uintptr_t *result) 60598aa9cd0SNate Lawson { 60698aa9cd0SNate Lawson struct acpi_cpu_softc *sc; 60798aa9cd0SNate Lawson 60898aa9cd0SNate Lawson sc = device_get_softc(dev); 60998aa9cd0SNate Lawson switch (index) { 61098aa9cd0SNate Lawson case ACPI_IVAR_HANDLE: 61198aa9cd0SNate Lawson *result = (uintptr_t)sc->cpu_handle; 61298aa9cd0SNate Lawson break; 61398aa9cd0SNate Lawson case CPU_IVAR_PCPU: 61498aa9cd0SNate Lawson *result = (uintptr_t)sc->cpu_pcpu; 61598aa9cd0SNate Lawson break; 616e1c9d39eSJung-uk Kim #if defined(__amd64__) || defined(__i386__) 617e1c9d39eSJung-uk Kim case CPU_IVAR_NOMINAL_MHZ: 618e1c9d39eSJung-uk Kim if (tsc_is_invariant) { 6193453537fSJung-uk Kim *result = (uintptr_t)(atomic_load_acq_64(&tsc_freq) / 1000000); 620e1c9d39eSJung-uk Kim break; 621e1c9d39eSJung-uk Kim } 622e1c9d39eSJung-uk Kim /* FALLTHROUGH */ 623e1c9d39eSJung-uk Kim #endif 62498aa9cd0SNate Lawson default: 62598aa9cd0SNate Lawson return (ENOENT); 62698aa9cd0SNate Lawson } 62798aa9cd0SNate Lawson return (0); 62898aa9cd0SNate Lawson } 62998aa9cd0SNate Lawson 6306b74f9b7SNate Lawson static int 63156a70eadSNate Lawson acpi_cpu_shutdown(device_t dev) 63256a70eadSNate Lawson { 63356a70eadSNate Lawson ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 63456a70eadSNate Lawson 63598aa9cd0SNate Lawson /* Allow children to shutdown first. */ 63698aa9cd0SNate Lawson bus_generic_shutdown(dev); 63798aa9cd0SNate Lawson 638cc3c11f9SNate Lawson /* 63909424d43SAndriy Gapon * Disable any entry to the idle function. 640cc3c11f9SNate Lawson */ 64109424d43SAndriy Gapon disable_idle(device_get_softc(dev)); 64209424d43SAndriy Gapon 64309424d43SAndriy Gapon /* 64409424d43SAndriy Gapon * CPU devices are not truely detached and remain referenced, 64509424d43SAndriy Gapon * so their resources are not freed. 64609424d43SAndriy Gapon */ 64756a70eadSNate Lawson 64856a70eadSNate Lawson return_VALUE (0); 64956a70eadSNate Lawson } 65056a70eadSNate Lawson 651907b6777SNate Lawson static void 6526b74f9b7SNate Lawson acpi_cpu_cx_probe(struct acpi_cpu_softc *sc) 6536b74f9b7SNate Lawson { 654907b6777SNate Lawson ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 655907b6777SNate Lawson 656907b6777SNate Lawson /* Use initial sleep value of 1 sec. to start with lowest idle state. */ 657907b6777SNate Lawson sc->cpu_prev_sleep = 1000000; 658907b6777SNate Lawson sc->cpu_cx_lowest = 0; 659d30b88afSAndriy Gapon sc->cpu_cx_lowest_lim = 0; 660907b6777SNate Lawson 661907b6777SNate Lawson /* 662907b6777SNate Lawson * Check for the ACPI 2.0 _CST sleep states object. If we can't find 663907b6777SNate Lawson * any, we'll revert to generic FADT/P_BLK Cx control method which will 664907b6777SNate Lawson * be handled by acpi_cpu_startup. We need to defer to after having 665907b6777SNate Lawson * probed all the cpus in the system before probing for generic Cx 666907b6777SNate Lawson * states as we may already have found cpus with valid _CST packages 667907b6777SNate Lawson */ 668907b6777SNate Lawson if (!cpu_cx_generic && acpi_cpu_cx_cst(sc) != 0) { 669907b6777SNate Lawson /* 670907b6777SNate Lawson * We were unable to find a _CST package for this cpu or there 671907b6777SNate Lawson * was an error parsing it. Switch back to generic mode. 672907b6777SNate Lawson */ 673907b6777SNate Lawson cpu_cx_generic = TRUE; 674bd826803SNate Lawson if (bootverbose) 675bd826803SNate Lawson device_printf(sc->cpu_dev, "switching to generic Cx mode\n"); 676907b6777SNate Lawson } 677907b6777SNate Lawson 678907b6777SNate Lawson /* 679907b6777SNate Lawson * TODO: _CSD Package should be checked here. 680907b6777SNate Lawson */ 681907b6777SNate Lawson } 682907b6777SNate Lawson 683907b6777SNate Lawson static void 684907b6777SNate Lawson acpi_cpu_generic_cx_probe(struct acpi_cpu_softc *sc) 685907b6777SNate Lawson { 6866b74f9b7SNate Lawson ACPI_GENERIC_ADDRESS gas; 6876b74f9b7SNate Lawson struct acpi_cx *cx_ptr; 68856a70eadSNate Lawson 68956a70eadSNate Lawson sc->cpu_cx_count = 0; 6906b74f9b7SNate Lawson cx_ptr = sc->cpu_cx_states; 691fec754d4SMike Smith 692907b6777SNate Lawson /* Use initial sleep value of 1 sec. to start with lowest idle state. */ 693907b6777SNate Lawson sc->cpu_prev_sleep = 1000000; 694907b6777SNate Lawson 6956b74f9b7SNate Lawson /* C1 has been required since just after ACPI 1.0 */ 6966b74f9b7SNate Lawson cx_ptr->type = ACPI_STATE_C1; 6976b74f9b7SNate Lawson cx_ptr->trans_lat = 0; 6986b74f9b7SNate Lawson cx_ptr++; 69992597e06SJohn Baldwin sc->cpu_non_c2 = sc->cpu_cx_count; 700987e5277SAndriy Gapon sc->cpu_non_c3 = sc->cpu_cx_count; 70156a70eadSNate Lawson sc->cpu_cx_count++; 70292597e06SJohn Baldwin cpu_deepest_sleep = 1; 70356a70eadSNate Lawson 704c181b89bSNate Lawson /* 705c181b89bSNate Lawson * The spec says P_BLK must be 6 bytes long. However, some systems 706c181b89bSNate Lawson * use it to indicate a fractional set of features present so we 707c181b89bSNate Lawson * take 5 as C2. Some may also have a value of 7 to indicate 708c181b89bSNate Lawson * another C3 but most use _CST for this (as required) and having 709c181b89bSNate Lawson * "only" C1-C3 is not a hardship. 710c181b89bSNate Lawson */ 711c181b89bSNate Lawson if (sc->cpu_p_blk_len < 5) 712907b6777SNate Lawson return; 713fec754d4SMike Smith 7146b74f9b7SNate Lawson /* Validate and allocate resources for C2 (P_LVL2). */ 7152be4e471SJung-uk Kim gas.SpaceId = ACPI_ADR_SPACE_SYSTEM_IO; 7162be4e471SJung-uk Kim gas.BitWidth = 8; 7172be4e471SJung-uk Kim if (AcpiGbl_FADT.C2Latency <= 100) { 71856a70eadSNate Lawson gas.Address = sc->cpu_p_blk + 4; 719f51d43feSAndriy Gapon cx_ptr->res_rid = 0; 720f51d43feSAndriy Gapon acpi_bus_alloc_gas(sc->cpu_dev, &cx_ptr->res_type, &cx_ptr->res_rid, 721907b6777SNate Lawson &gas, &cx_ptr->p_lvlx, RF_SHAREABLE); 7226b74f9b7SNate Lawson if (cx_ptr->p_lvlx != NULL) { 7236b74f9b7SNate Lawson cx_ptr->type = ACPI_STATE_C2; 7242be4e471SJung-uk Kim cx_ptr->trans_lat = AcpiGbl_FADT.C2Latency; 7256b74f9b7SNate Lawson cx_ptr++; 726987e5277SAndriy Gapon sc->cpu_non_c3 = sc->cpu_cx_count; 72756a70eadSNate Lawson sc->cpu_cx_count++; 72892597e06SJohn Baldwin cpu_deepest_sleep = 2; 729fec754d4SMike Smith } 730fec754d4SMike Smith } 731c181b89bSNate Lawson if (sc->cpu_p_blk_len < 6) 732907b6777SNate Lawson return; 733be2b1797SNate Lawson 7346b74f9b7SNate Lawson /* Validate and allocate resources for C3 (P_LVL3). */ 7356e1de64dSRui Paulo if (AcpiGbl_FADT.C3Latency <= 1000 && !(cpu_quirks & CPU_QUIRK_NO_C3)) { 73656a70eadSNate Lawson gas.Address = sc->cpu_p_blk + 5; 737f51d43feSAndriy Gapon cx_ptr->res_rid = 1; 738f51d43feSAndriy Gapon acpi_bus_alloc_gas(sc->cpu_dev, &cx_ptr->res_type, &cx_ptr->res_rid, 739f51d43feSAndriy Gapon &gas, &cx_ptr->p_lvlx, RF_SHAREABLE); 7406b74f9b7SNate Lawson if (cx_ptr->p_lvlx != NULL) { 7416b74f9b7SNate Lawson cx_ptr->type = ACPI_STATE_C3; 7422be4e471SJung-uk Kim cx_ptr->trans_lat = AcpiGbl_FADT.C3Latency; 7436b74f9b7SNate Lawson cx_ptr++; 74456a70eadSNate Lawson sc->cpu_cx_count++; 74592597e06SJohn Baldwin cpu_deepest_sleep = 3; 7466b74f9b7SNate Lawson } 7476b74f9b7SNate Lawson } 7486b74f9b7SNate Lawson } 7496b74f9b7SNate Lawson 750044a49cdSAndrew Turner #if defined(__i386__) || defined(__amd64__) 751b57a73f8SKonstantin Belousov static void 752b57a73f8SKonstantin Belousov acpi_cpu_cx_cst_mwait(struct acpi_cx *cx_ptr, uint64_t address, int accsize) 753b57a73f8SKonstantin Belousov { 754b57a73f8SKonstantin Belousov 755b57a73f8SKonstantin Belousov cx_ptr->do_mwait = true; 756b57a73f8SKonstantin Belousov cx_ptr->mwait_hint = address & 0xffffffff; 757b57a73f8SKonstantin Belousov cx_ptr->mwait_hw_coord = (accsize & CST_FFH_MWAIT_HW_COORD) != 0; 758b57a73f8SKonstantin Belousov cx_ptr->mwait_bm_avoidance = (accsize & CST_FFH_MWAIT_BM_AVOID) != 0; 759b57a73f8SKonstantin Belousov } 760044a49cdSAndrew Turner #endif 761b57a73f8SKonstantin Belousov 762b57a73f8SKonstantin Belousov static void 763b57a73f8SKonstantin Belousov acpi_cpu_cx_cst_free_plvlx(device_t cpu_dev, struct acpi_cx *cx_ptr) 764b57a73f8SKonstantin Belousov { 765b57a73f8SKonstantin Belousov 766b57a73f8SKonstantin Belousov if (cx_ptr->p_lvlx == NULL) 767b57a73f8SKonstantin Belousov return; 768b57a73f8SKonstantin Belousov bus_release_resource(cpu_dev, cx_ptr->res_type, cx_ptr->res_rid, 769b57a73f8SKonstantin Belousov cx_ptr->p_lvlx); 770b57a73f8SKonstantin Belousov cx_ptr->p_lvlx = NULL; 771b57a73f8SKonstantin Belousov } 772b57a73f8SKonstantin Belousov 7736b74f9b7SNate Lawson /* 7746b74f9b7SNate Lawson * Parse a _CST package and set up its Cx states. Since the _CST object 7756b74f9b7SNate Lawson * can change dynamically, our notify handler may call this function 7766b74f9b7SNate Lawson * to clean up and probe the new _CST package. 7776b74f9b7SNate Lawson */ 7786b74f9b7SNate Lawson static int 7796b74f9b7SNate Lawson acpi_cpu_cx_cst(struct acpi_cpu_softc *sc) 7806b74f9b7SNate Lawson { 7816b74f9b7SNate Lawson struct acpi_cx *cx_ptr; 7826b74f9b7SNate Lawson ACPI_STATUS status; 7836b74f9b7SNate Lawson ACPI_BUFFER buf; 7846b74f9b7SNate Lawson ACPI_OBJECT *top; 7856b74f9b7SNate Lawson ACPI_OBJECT *pkg; 7866b74f9b7SNate Lawson uint32_t count; 787044a49cdSAndrew Turner int i; 788044a49cdSAndrew Turner #if defined(__i386__) || defined(__amd64__) 789b57a73f8SKonstantin Belousov uint64_t address; 790044a49cdSAndrew Turner int vendor, class, accsize; 791044a49cdSAndrew Turner #endif 7926b74f9b7SNate Lawson 79356a70eadSNate Lawson ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 79456a70eadSNate Lawson 7956b74f9b7SNate Lawson buf.Pointer = NULL; 7966b74f9b7SNate Lawson buf.Length = ACPI_ALLOCATE_BUFFER; 7976b74f9b7SNate Lawson status = AcpiEvaluateObject(sc->cpu_handle, "_CST", NULL, &buf); 798bd826803SNate Lawson if (ACPI_FAILURE(status)) 7996b74f9b7SNate Lawson return (ENXIO); 8006b74f9b7SNate Lawson 8016b74f9b7SNate Lawson /* _CST is a package with a count and at least one Cx package. */ 8026b74f9b7SNate Lawson top = (ACPI_OBJECT *)buf.Pointer; 80321cea91fSNate Lawson if (!ACPI_PKG_VALID(top, 2) || acpi_PkgInt32(top, 0, &count) != 0) { 804bd826803SNate Lawson device_printf(sc->cpu_dev, "invalid _CST package\n"); 8056b74f9b7SNate Lawson AcpiOsFree(buf.Pointer); 8066b74f9b7SNate Lawson return (ENXIO); 8076b74f9b7SNate Lawson } 8086b74f9b7SNate Lawson if (count != top->Package.Count - 1) { 809bd826803SNate Lawson device_printf(sc->cpu_dev, "invalid _CST state count (%d != %d)\n", 8106b74f9b7SNate Lawson count, top->Package.Count - 1); 8116b74f9b7SNate Lawson count = top->Package.Count - 1; 8126b74f9b7SNate Lawson } 8136b74f9b7SNate Lawson if (count > MAX_CX_STATES) { 81456a70eadSNate Lawson device_printf(sc->cpu_dev, "_CST has too many states (%d)\n", count); 8156b74f9b7SNate Lawson count = MAX_CX_STATES; 8166b74f9b7SNate Lawson } 8176b74f9b7SNate Lawson 81892597e06SJohn Baldwin sc->cpu_non_c2 = 0; 81968d5e11cSJung-uk Kim sc->cpu_non_c3 = 0; 82056a70eadSNate Lawson sc->cpu_cx_count = 0; 8216b74f9b7SNate Lawson cx_ptr = sc->cpu_cx_states; 82268d5e11cSJung-uk Kim 82368d5e11cSJung-uk Kim /* 82468d5e11cSJung-uk Kim * C1 has been required since just after ACPI 1.0. 82568d5e11cSJung-uk Kim * Reserve the first slot for it. 82668d5e11cSJung-uk Kim */ 82768d5e11cSJung-uk Kim cx_ptr->type = ACPI_STATE_C0; 82868d5e11cSJung-uk Kim cx_ptr++; 82968d5e11cSJung-uk Kim sc->cpu_cx_count++; 83092597e06SJohn Baldwin cpu_deepest_sleep = 1; 83168d5e11cSJung-uk Kim 83268d5e11cSJung-uk Kim /* Set up all valid states. */ 8336b74f9b7SNate Lawson for (i = 0; i < count; i++) { 8346b74f9b7SNate Lawson pkg = &top->Package.Elements[i + 1]; 83521cea91fSNate Lawson if (!ACPI_PKG_VALID(pkg, 4) || 83621cea91fSNate Lawson acpi_PkgInt32(pkg, 1, &cx_ptr->type) != 0 || 83721cea91fSNate Lawson acpi_PkgInt32(pkg, 2, &cx_ptr->trans_lat) != 0 || 83821cea91fSNate Lawson acpi_PkgInt32(pkg, 3, &cx_ptr->power) != 0) { 83921cea91fSNate Lawson 84080f006a1SNate Lawson device_printf(sc->cpu_dev, "skipping invalid Cx state package\n"); 8416b74f9b7SNate Lawson continue; 8426b74f9b7SNate Lawson } 8436b74f9b7SNate Lawson 8446b74f9b7SNate Lawson /* Validate the state to see if we should use it. */ 8456b74f9b7SNate Lawson switch (cx_ptr->type) { 8466b74f9b7SNate Lawson case ACPI_STATE_C1: 847b57a73f8SKonstantin Belousov acpi_cpu_cx_cst_free_plvlx(sc->cpu_dev, cx_ptr); 848b57a73f8SKonstantin Belousov #if defined(__i386__) || defined(__amd64__) 849b57a73f8SKonstantin Belousov if (acpi_PkgFFH_IntelCpu(pkg, 0, &vendor, &class, &address, 850b57a73f8SKonstantin Belousov &accsize) == 0 && vendor == CST_FFH_VENDOR_INTEL) { 851b57a73f8SKonstantin Belousov if (class == CST_FFH_INTEL_CL_C1IO) { 852b57a73f8SKonstantin Belousov /* C1 I/O then Halt */ 853b57a73f8SKonstantin Belousov cx_ptr->res_rid = sc->cpu_cx_count; 854b57a73f8SKonstantin Belousov bus_set_resource(sc->cpu_dev, SYS_RES_IOPORT, 855b57a73f8SKonstantin Belousov cx_ptr->res_rid, address, 1); 856b57a73f8SKonstantin Belousov cx_ptr->p_lvlx = bus_alloc_resource_any(sc->cpu_dev, 857b57a73f8SKonstantin Belousov SYS_RES_IOPORT, &cx_ptr->res_rid, RF_ACTIVE | 858b57a73f8SKonstantin Belousov RF_SHAREABLE); 859b57a73f8SKonstantin Belousov if (cx_ptr->p_lvlx == NULL) { 860b57a73f8SKonstantin Belousov bus_delete_resource(sc->cpu_dev, SYS_RES_IOPORT, 861b57a73f8SKonstantin Belousov cx_ptr->res_rid); 862b57a73f8SKonstantin Belousov device_printf(sc->cpu_dev, 863b57a73f8SKonstantin Belousov "C1 I/O failed to allocate port %d, " 864b57a73f8SKonstantin Belousov "degrading to C1 Halt", (int)address); 865b57a73f8SKonstantin Belousov } 866b57a73f8SKonstantin Belousov } else if (class == CST_FFH_INTEL_CL_MWAIT) { 867b57a73f8SKonstantin Belousov acpi_cpu_cx_cst_mwait(cx_ptr, address, accsize); 868b57a73f8SKonstantin Belousov } 869b57a73f8SKonstantin Belousov } 870b57a73f8SKonstantin Belousov #endif 87168d5e11cSJung-uk Kim if (sc->cpu_cx_states[0].type == ACPI_STATE_C0) { 87268d5e11cSJung-uk Kim /* This is the first C1 state. Use the reserved slot. */ 87368d5e11cSJung-uk Kim sc->cpu_cx_states[0] = *cx_ptr; 87468d5e11cSJung-uk Kim } else { 87592597e06SJohn Baldwin sc->cpu_non_c2 = sc->cpu_cx_count; 87656101001SAndriy Gapon sc->cpu_non_c3 = sc->cpu_cx_count; 8776b74f9b7SNate Lawson cx_ptr++; 87856a70eadSNate Lawson sc->cpu_cx_count++; 87968d5e11cSJung-uk Kim } 8806b74f9b7SNate Lawson continue; 8816b74f9b7SNate Lawson case ACPI_STATE_C2: 88256101001SAndriy Gapon sc->cpu_non_c3 = sc->cpu_cx_count; 88392597e06SJohn Baldwin if (cpu_deepest_sleep < 2) 88492597e06SJohn Baldwin cpu_deepest_sleep = 2; 8856b74f9b7SNate Lawson break; 8866b74f9b7SNate Lawson case ACPI_STATE_C3: 8876b74f9b7SNate Lawson default: 88809c22c66SAndriy Gapon if ((cpu_quirks & CPU_QUIRK_NO_C3) != 0) { 88956a70eadSNate Lawson ACPI_DEBUG_PRINT((ACPI_DB_INFO, 89056a70eadSNate Lawson "acpi_cpu%d: C3[%d] not available.\n", 89156a70eadSNate Lawson device_get_unit(sc->cpu_dev), i)); 8926b74f9b7SNate Lawson continue; 893412ef220SAndriy Gapon } else 89492597e06SJohn Baldwin cpu_deepest_sleep = 3; 8956b74f9b7SNate Lawson break; 8966b74f9b7SNate Lawson } 8976b74f9b7SNate Lawson 8986b74f9b7SNate Lawson /* Free up any previous register. */ 899b57a73f8SKonstantin Belousov acpi_cpu_cx_cst_free_plvlx(sc->cpu_dev, cx_ptr); 9006b74f9b7SNate Lawson 9016b74f9b7SNate Lawson /* Allocate the control register for C2 or C3. */ 902b57a73f8SKonstantin Belousov #if defined(__i386__) || defined(__amd64__) 903b57a73f8SKonstantin Belousov if (acpi_PkgFFH_IntelCpu(pkg, 0, &vendor, &class, &address, 904b57a73f8SKonstantin Belousov &accsize) == 0 && vendor == CST_FFH_VENDOR_INTEL && 905b57a73f8SKonstantin Belousov class == CST_FFH_INTEL_CL_MWAIT) { 906b57a73f8SKonstantin Belousov /* Native C State Instruction use (mwait) */ 907b57a73f8SKonstantin Belousov acpi_cpu_cx_cst_mwait(cx_ptr, address, accsize); 908b57a73f8SKonstantin Belousov ACPI_DEBUG_PRINT((ACPI_DB_INFO, 909b57a73f8SKonstantin Belousov "acpi_cpu%d: Got C%d/mwait - %d latency\n", 910b57a73f8SKonstantin Belousov device_get_unit(sc->cpu_dev), cx_ptr->type, cx_ptr->trans_lat)); 911b57a73f8SKonstantin Belousov cx_ptr++; 912b57a73f8SKonstantin Belousov sc->cpu_cx_count++; 913b57a73f8SKonstantin Belousov } else 914b57a73f8SKonstantin Belousov #endif 915b57a73f8SKonstantin Belousov { 916f51d43feSAndriy Gapon cx_ptr->res_rid = sc->cpu_cx_count; 917b57a73f8SKonstantin Belousov acpi_PkgGas(sc->cpu_dev, pkg, 0, &cx_ptr->res_type, 918b57a73f8SKonstantin Belousov &cx_ptr->res_rid, &cx_ptr->p_lvlx, RF_SHAREABLE); 919f4eb0418SNate Lawson if (cx_ptr->p_lvlx) { 92056a70eadSNate Lawson ACPI_DEBUG_PRINT((ACPI_DB_INFO, 92156a70eadSNate Lawson "acpi_cpu%d: Got C%d - %d latency\n", 92256a70eadSNate Lawson device_get_unit(sc->cpu_dev), cx_ptr->type, 92356a70eadSNate Lawson cx_ptr->trans_lat)); 9246b74f9b7SNate Lawson cx_ptr++; 92556a70eadSNate Lawson sc->cpu_cx_count++; 9266b74f9b7SNate Lawson } 9276b74f9b7SNate Lawson } 928b57a73f8SKonstantin Belousov } 9296b74f9b7SNate Lawson AcpiOsFree(buf.Pointer); 9306b74f9b7SNate Lawson 93168d5e11cSJung-uk Kim /* If C1 state was not found, we need one now. */ 93268d5e11cSJung-uk Kim cx_ptr = sc->cpu_cx_states; 93368d5e11cSJung-uk Kim if (cx_ptr->type == ACPI_STATE_C0) { 93468d5e11cSJung-uk Kim cx_ptr->type = ACPI_STATE_C1; 93568d5e11cSJung-uk Kim cx_ptr->trans_lat = 0; 93668d5e11cSJung-uk Kim } 93768d5e11cSJung-uk Kim 9386b74f9b7SNate Lawson return (0); 939fec754d4SMike Smith } 940fec754d4SMike Smith 941fec754d4SMike Smith /* 942fec754d4SMike Smith * Call this *after* all CPUs have been attached. 943fec754d4SMike Smith */ 944fec754d4SMike Smith static void 9456b74f9b7SNate Lawson acpi_cpu_startup(void *arg) 946fec754d4SMike Smith { 94756a70eadSNate Lawson struct acpi_cpu_softc *sc; 948907b6777SNate Lawson int i; 949fec754d4SMike Smith 950be2b1797SNate Lawson /* Get set of CPU devices */ 9513045c8afSNate Lawson devclass_get_devices(acpi_cpu_devclass, &cpu_devices, &cpu_ndevices); 952fec754d4SMike Smith 95356a70eadSNate Lawson /* 954907b6777SNate Lawson * Setup any quirks that might necessary now that we have probed 955907b6777SNate Lawson * all the CPUs 95656a70eadSNate Lawson */ 957907b6777SNate Lawson acpi_cpu_quirks(); 958907b6777SNate Lawson 959907b6777SNate Lawson if (cpu_cx_generic) { 960907b6777SNate Lawson /* 961907b6777SNate Lawson * We are using generic Cx mode, probe for available Cx states 962907b6777SNate Lawson * for all processors. 963907b6777SNate Lawson */ 96456a70eadSNate Lawson for (i = 0; i < cpu_ndevices; i++) { 96556a70eadSNate Lawson sc = device_get_softc(cpu_devices[i]); 966907b6777SNate Lawson acpi_cpu_generic_cx_probe(sc); 967907b6777SNate Lawson } 968907b6777SNate Lawson } else { 969907b6777SNate Lawson /* 970907b6777SNate Lawson * We are using _CST mode, remove C3 state if necessary. 971907b6777SNate Lawson * As we now know for sure that we will be using _CST mode 972907b6777SNate Lawson * install our notify handler. 973907b6777SNate Lawson */ 974907b6777SNate Lawson for (i = 0; i < cpu_ndevices; i++) { 975907b6777SNate Lawson sc = device_get_softc(cpu_devices[i]); 9767a310721SJohn Baldwin if (cpu_quirks & CPU_QUIRK_NO_C3) { 977633a2847SColin Percival sc->cpu_cx_count = min(sc->cpu_cx_count, sc->cpu_non_c3 + 1); 978907b6777SNate Lawson } 979907b6777SNate Lawson AcpiInstallNotifyHandler(sc->cpu_handle, ACPI_DEVICE_NOTIFY, 980907b6777SNate Lawson acpi_cpu_notify, sc); 981907b6777SNate Lawson } 982907b6777SNate Lawson } 98356a70eadSNate Lawson 9848c5468e3SNate Lawson /* Perform Cx final initialization. */ 985907b6777SNate Lawson for (i = 0; i < cpu_ndevices; i++) { 986907b6777SNate Lawson sc = device_get_softc(cpu_devices[i]); 987907b6777SNate Lawson acpi_cpu_startup_cx(sc); 988907b6777SNate Lawson } 989907b6777SNate Lawson 990907b6777SNate Lawson /* Add a sysctl handler to handle global Cx lowest setting */ 991907b6777SNate Lawson SYSCTL_ADD_PROC(&cpu_sysctl_ctx, SYSCTL_CHILDREN(cpu_sysctl_tree), 992907b6777SNate Lawson OID_AUTO, "cx_lowest", CTLTYPE_STRING | CTLFLAG_RW, 993907b6777SNate Lawson NULL, 0, acpi_cpu_global_cx_lowest_sysctl, "A", 994907b6777SNate Lawson "Global lowest Cx sleep state to use"); 995907b6777SNate Lawson 996907b6777SNate Lawson /* Take over idling from cpu_idle_default(). */ 997d30b88afSAndriy Gapon cpu_cx_lowest_lim = 0; 99809424d43SAndriy Gapon for (i = 0; i < cpu_ndevices; i++) { 99909424d43SAndriy Gapon sc = device_get_softc(cpu_devices[i]); 100009424d43SAndriy Gapon enable_idle(sc); 100109424d43SAndriy Gapon } 1002907b6777SNate Lawson cpu_idle_hook = acpi_cpu_idle; 10036b74f9b7SNate Lawson } 10046b74f9b7SNate Lawson 100556a70eadSNate Lawson static void 100689ab2a7aSRui Paulo acpi_cpu_cx_list(struct acpi_cpu_softc *sc) 100756a70eadSNate Lawson { 100856a70eadSNate Lawson struct sbuf sb; 100956a70eadSNate Lawson int i; 101056a70eadSNate Lawson 1011ae56b59fSNate Lawson /* 1012907b6777SNate Lawson * Set up the list of Cx states 1013ae56b59fSNate Lawson */ 1014907b6777SNate Lawson sbuf_new(&sb, sc->cpu_cx_supported, sizeof(sc->cpu_cx_supported), 1015907b6777SNate Lawson SBUF_FIXEDLEN); 1016412ef220SAndriy Gapon for (i = 0; i < sc->cpu_cx_count; i++) 10173c5c5559SAlexander Motin sbuf_printf(&sb, "C%d/%d/%d ", i + 1, sc->cpu_cx_states[i].type, 10183c5c5559SAlexander Motin sc->cpu_cx_states[i].trans_lat); 101956a70eadSNate Lawson sbuf_trim(&sb); 102056a70eadSNate Lawson sbuf_finish(&sb); 102189ab2a7aSRui Paulo } 102289ab2a7aSRui Paulo 102389ab2a7aSRui Paulo static void 102489ab2a7aSRui Paulo acpi_cpu_startup_cx(struct acpi_cpu_softc *sc) 102589ab2a7aSRui Paulo { 102689ab2a7aSRui Paulo acpi_cpu_cx_list(sc); 1027907b6777SNate Lawson 1028907b6777SNate Lawson SYSCTL_ADD_STRING(&sc->cpu_sysctl_ctx, 1029907b6777SNate Lawson SYSCTL_CHILDREN(device_get_sysctl_tree(sc->cpu_dev)), 1030907b6777SNate Lawson OID_AUTO, "cx_supported", CTLFLAG_RD, 1031907b6777SNate Lawson sc->cpu_cx_supported, 0, 1032907b6777SNate Lawson "Cx/microsecond values for supported Cx states"); 1033907b6777SNate Lawson SYSCTL_ADD_PROC(&sc->cpu_sysctl_ctx, 1034907b6777SNate Lawson SYSCTL_CHILDREN(device_get_sysctl_tree(sc->cpu_dev)), 1035ccc09458SNate Lawson OID_AUTO, "cx_lowest", CTLTYPE_STRING | CTLFLAG_RW, 1036907b6777SNate Lawson (void *)sc, 0, acpi_cpu_cx_lowest_sysctl, "A", 103756a70eadSNate Lawson "lowest Cx sleep state to use"); 1038907b6777SNate Lawson SYSCTL_ADD_PROC(&sc->cpu_sysctl_ctx, 1039907b6777SNate Lawson SYSCTL_CHILDREN(device_get_sysctl_tree(sc->cpu_dev)), 1040a2afe45aSNate Lawson OID_AUTO, "cx_usage", CTLTYPE_STRING | CTLFLAG_RD, 1041907b6777SNate Lawson (void *)sc, 0, acpi_cpu_usage_sysctl, "A", 1042a2afe45aSNate Lawson "percent usage for each Cx state"); 10430d470054SAdrian Chadd SYSCTL_ADD_PROC(&sc->cpu_sysctl_ctx, 10440d470054SAdrian Chadd SYSCTL_CHILDREN(device_get_sysctl_tree(sc->cpu_dev)), 10450d470054SAdrian Chadd OID_AUTO, "cx_usage_counters", CTLTYPE_STRING | CTLFLAG_RD, 10460d470054SAdrian Chadd (void *)sc, 0, acpi_cpu_usage_counters_sysctl, "A", 10470d470054SAdrian Chadd "Cx sleep state counters"); 1048b57a73f8SKonstantin Belousov #if defined(__i386__) || defined(__amd64__) 1049b57a73f8SKonstantin Belousov SYSCTL_ADD_PROC(&sc->cpu_sysctl_ctx, 1050b57a73f8SKonstantin Belousov SYSCTL_CHILDREN(device_get_sysctl_tree(sc->cpu_dev)), 1051b57a73f8SKonstantin Belousov OID_AUTO, "cx_method", CTLTYPE_STRING | CTLFLAG_RD, 1052b57a73f8SKonstantin Belousov (void *)sc, 0, acpi_cpu_method_sysctl, "A", 1053b57a73f8SKonstantin Belousov "Cx entrance methods"); 1054b57a73f8SKonstantin Belousov #endif 105556a70eadSNate Lawson 105656a70eadSNate Lawson /* Signal platform that we can handle _CST notification. */ 1057907b6777SNate Lawson if (!cpu_cx_generic && cpu_cst_cnt != 0) { 1058d92a2ebdSNate Lawson ACPI_LOCK(acpi); 105956a70eadSNate Lawson AcpiOsWritePort(cpu_smi_cmd, cpu_cst_cnt, 8); 1060d92a2ebdSNate Lawson ACPI_UNLOCK(acpi); 106156a70eadSNate Lawson } 106256a70eadSNate Lawson } 106356a70eadSNate Lawson 1064fec754d4SMike Smith /* 1065a2afe45aSNate Lawson * Idle the CPU in the lowest state possible. This function is called with 1066a2afe45aSNate Lawson * interrupts disabled. Note that once it re-enables interrupts, a task 1067a2afe45aSNate Lawson * switch can occur so do not access shared data (i.e. the softc) after 1068a2afe45aSNate Lawson * interrupts are re-enabled. 10696b74f9b7SNate Lawson */ 10706b74f9b7SNate Lawson static void 1071acccf7d8SDavide Italiano acpi_cpu_idle(sbintime_t sbt) 10726b74f9b7SNate Lawson { 10736b74f9b7SNate Lawson struct acpi_cpu_softc *sc; 107456a70eadSNate Lawson struct acpi_cx *cx_next; 10753c5c5559SAlexander Motin uint64_t cputicks; 10766b74f9b7SNate Lawson uint32_t start_time, end_time; 1077acccf7d8SDavide Italiano int bm_active, cx_next_idx, i, us; 10786b74f9b7SNate Lawson 1079cd1f3db9SNate Lawson /* 1080cd1f3db9SNate Lawson * Look up our CPU id to get our softc. If it's NULL, we'll use C1 1081cd1f3db9SNate Lawson * since there is no ACPI processor object for this CPU. This occurs 1082cd1f3db9SNate Lawson * for logical CPUs in the HTT case. 1083cd1f3db9SNate Lawson */ 1084cd1f3db9SNate Lawson sc = cpu_softc[PCPU_GET(cpuid)]; 1085cd1f3db9SNate Lawson if (sc == NULL) { 1086cd1f3db9SNate Lawson acpi_cpu_c1(); 1087cd1f3db9SNate Lawson return; 1088cd1f3db9SNate Lawson } 1089cd1f3db9SNate Lawson 109030bf6110SAndriy Gapon /* If disabled, take the safe path. */ 109109424d43SAndriy Gapon if (is_idle_disabled(sc)) { 109230bf6110SAndriy Gapon acpi_cpu_c1(); 109309424d43SAndriy Gapon return; 109409424d43SAndriy Gapon } 109509424d43SAndriy Gapon 1096bb1d6ad5SAlexander Motin /* Find the lowest state that has small enough latency. */ 1097acccf7d8SDavide Italiano us = sc->cpu_prev_sleep; 1098d9ddf0c0SDavide Italiano if (sbt >= 0 && us > (sbt >> 12)) 1099d9ddf0c0SDavide Italiano us = (sbt >> 12); 1100b0baaaaeSAlexander Motin cx_next_idx = 0; 110192597e06SJohn Baldwin if (cpu_disable_c2_sleep) 110292597e06SJohn Baldwin i = min(sc->cpu_cx_lowest, sc->cpu_non_c2); 110392597e06SJohn Baldwin else if (cpu_disable_c3_sleep) 110448fe2e67SAlexander Motin i = min(sc->cpu_cx_lowest, sc->cpu_non_c3); 110555fb7f36SSean Bruno else 1106a157e425SAlexander Motin i = sc->cpu_cx_lowest; 1107a157e425SAlexander Motin for (; i >= 0; i--) { 1108acccf7d8SDavide Italiano if (sc->cpu_cx_states[i].trans_lat * 3 <= us) { 1109a2afe45aSNate Lawson cx_next_idx = i; 1110a2afe45aSNate Lawson break; 1111a2afe45aSNate Lawson } 111280f006a1SNate Lawson } 111356a70eadSNate Lawson 11146b74f9b7SNate Lawson /* 11156b74f9b7SNate Lawson * Check for bus master activity. If there was activity, clear 11166b74f9b7SNate Lawson * the bit and use the lowest non-C3 state. Note that the USB 11176b74f9b7SNate Lawson * driver polling for new devices keeps this bit set all the 1118f435261dSNate Lawson * time if USB is loaded. 11196b74f9b7SNate Lawson */ 11203c5c5559SAlexander Motin if ((cpu_quirks & CPU_QUIRK_NO_BM_CTRL) == 0 && 11213c5c5559SAlexander Motin cx_next_idx > sc->cpu_non_c3) { 1122129d3046SJung-uk Kim AcpiReadBitRegister(ACPI_BITREG_BUS_MASTER_STATUS, &bm_active); 11236b74f9b7SNate Lawson if (bm_active != 0) { 1124129d3046SJung-uk Kim AcpiWriteBitRegister(ACPI_BITREG_BUS_MASTER_STATUS, 1); 11253c5c5559SAlexander Motin cx_next_idx = sc->cpu_non_c3; 11266b74f9b7SNate Lawson } 1127f435261dSNate Lawson } 11286b74f9b7SNate Lawson 1129a2afe45aSNate Lawson /* Select the next state and update statistics. */ 1130a2afe45aSNate Lawson cx_next = &sc->cpu_cx_states[cx_next_idx]; 1131907b6777SNate Lawson sc->cpu_cx_stats[cx_next_idx]++; 1132a2afe45aSNate Lawson KASSERT(cx_next->type != ACPI_STATE_C0, ("acpi_cpu_idle: C0 sleep")); 11336b74f9b7SNate Lawson 11346b74f9b7SNate Lawson /* 1135a2afe45aSNate Lawson * Execute HLT (or equivalent) and wait for an interrupt. We can't 11367150e671SAlexander Motin * precisely calculate the time spent in C1 since the place we wake up 1137a157e425SAlexander Motin * is an ISR. Assume we slept no more then half of quantum, unless 1138a157e425SAlexander Motin * we are called inside critical section, delaying context switch. 11396b74f9b7SNate Lawson */ 1140a2afe45aSNate Lawson if (cx_next->type == ACPI_STATE_C1) { 11413c5c5559SAlexander Motin cputicks = cpu_ticks(); 1142b57a73f8SKonstantin Belousov if (cx_next->p_lvlx != NULL) { 1143b57a73f8SKonstantin Belousov /* C1 I/O then Halt */ 1144b57a73f8SKonstantin Belousov CPU_GET_REG(cx_next->p_lvlx, 1); 1145b57a73f8SKonstantin Belousov } 1146b57a73f8SKonstantin Belousov if (cx_next->do_mwait) 1147b57a73f8SKonstantin Belousov acpi_cpu_idle_mwait(cx_next->mwait_hint); 1148b57a73f8SKonstantin Belousov else 1149a2afe45aSNate Lawson acpi_cpu_c1(); 11503c5c5559SAlexander Motin end_time = ((cpu_ticks() - cputicks) << 20) / cpu_tickrate(); 1151a157e425SAlexander Motin if (curthread->td_critnest == 0) 1152a157e425SAlexander Motin end_time = min(end_time, 500000 / hz); 1153a157e425SAlexander Motin sc->cpu_prev_sleep = (sc->cpu_prev_sleep * 3 + end_time) / 4; 1154a2afe45aSNate Lawson return; 1155a2afe45aSNate Lawson } 1156a2afe45aSNate Lawson 1157f435261dSNate Lawson /* 1158f435261dSNate Lawson * For C3, disable bus master arbitration and enable bus master wake 1159f435261dSNate Lawson * if BM control is available, otherwise flush the CPU cache. 1160f435261dSNate Lawson */ 1161b57a73f8SKonstantin Belousov if (cx_next->type == ACPI_STATE_C3 || cx_next->mwait_bm_avoidance) { 1162f435261dSNate Lawson if ((cpu_quirks & CPU_QUIRK_NO_BM_CTRL) == 0) { 1163129d3046SJung-uk Kim AcpiWriteBitRegister(ACPI_BITREG_ARB_DISABLE, 1); 1164129d3046SJung-uk Kim AcpiWriteBitRegister(ACPI_BITREG_BUS_MASTER_RLD, 1); 1165f435261dSNate Lawson } else 1166f435261dSNate Lawson ACPI_FLUSH_CPU_CACHE(); 1167a2afe45aSNate Lawson } 1168a2afe45aSNate Lawson 11696b74f9b7SNate Lawson /* 1170a2afe45aSNate Lawson * Read from P_LVLx to enter C2(+), checking time spent asleep. 11716b74f9b7SNate Lawson * Use the ACPI timer for measuring sleep time. Since we need to 11726b74f9b7SNate Lawson * get the time very close to the CPU start/stop clock logic, this 11736b74f9b7SNate Lawson * is the only reliable time source. 11746b74f9b7SNate Lawson */ 11753c5c5559SAlexander Motin if (cx_next->type == ACPI_STATE_C3) { 117692488a57SJung-uk Kim AcpiHwRead(&start_time, &AcpiGbl_FADT.XPmTimerBlock); 11773c5c5559SAlexander Motin cputicks = 0; 11783c5c5559SAlexander Motin } else { 11793c5c5559SAlexander Motin start_time = 0; 11803c5c5559SAlexander Motin cputicks = cpu_ticks(); 11813c5c5559SAlexander Motin } 1182b57a73f8SKonstantin Belousov if (cx_next->do_mwait) 1183b57a73f8SKonstantin Belousov acpi_cpu_idle_mwait(cx_next->mwait_hint); 1184b57a73f8SKonstantin Belousov else 11856b74f9b7SNate Lawson CPU_GET_REG(cx_next->p_lvlx, 1); 11866b74f9b7SNate Lawson 11876b74f9b7SNate Lawson /* 11886b74f9b7SNate Lawson * Read the end time twice. Since it may take an arbitrary time 11896b74f9b7SNate Lawson * to enter the idle state, the first read may be executed before 11906b74f9b7SNate Lawson * the processor has stopped. Doing it again provides enough 11916b74f9b7SNate Lawson * margin that we are certain to have a correct value. 11926b74f9b7SNate Lawson */ 119392488a57SJung-uk Kim AcpiHwRead(&end_time, &AcpiGbl_FADT.XPmTimerBlock); 11943c5c5559SAlexander Motin if (cx_next->type == ACPI_STATE_C3) { 119592488a57SJung-uk Kim AcpiHwRead(&end_time, &AcpiGbl_FADT.XPmTimerBlock); 11963c5c5559SAlexander Motin end_time = acpi_TimerDelta(end_time, start_time); 11973c5c5559SAlexander Motin } else 11983c5c5559SAlexander Motin end_time = ((cpu_ticks() - cputicks) << 20) / cpu_tickrate(); 11996b74f9b7SNate Lawson 12006b74f9b7SNate Lawson /* Enable bus master arbitration and disable bus master wakeup. */ 1201b57a73f8SKonstantin Belousov if ((cx_next->type == ACPI_STATE_C3 || cx_next->mwait_bm_avoidance) && 120218ececa0SNate Lawson (cpu_quirks & CPU_QUIRK_NO_BM_CTRL) == 0) { 1203129d3046SJung-uk Kim AcpiWriteBitRegister(ACPI_BITREG_ARB_DISABLE, 0); 1204129d3046SJung-uk Kim AcpiWriteBitRegister(ACPI_BITREG_BUS_MASTER_RLD, 0); 12056b74f9b7SNate Lawson } 120680f006a1SNate Lawson ACPI_ENABLE_IRQS(); 12076b74f9b7SNate Lawson 1208b0baaaaeSAlexander Motin sc->cpu_prev_sleep = (sc->cpu_prev_sleep * 3 + PM_USEC(end_time)) / 4; 12096b74f9b7SNate Lawson } 12106b74f9b7SNate Lawson 12116b74f9b7SNate Lawson /* 12128b888c66SNate Lawson * Re-evaluate the _CST object when we are notified that it changed. 12136b74f9b7SNate Lawson */ 12146b74f9b7SNate Lawson static void 12156b74f9b7SNate Lawson acpi_cpu_notify(ACPI_HANDLE h, UINT32 notify, void *context) 12166b74f9b7SNate Lawson { 12176b74f9b7SNate Lawson struct acpi_cpu_softc *sc = (struct acpi_cpu_softc *)context; 12186b74f9b7SNate Lawson 12198b888c66SNate Lawson if (notify != ACPI_NOTIFY_CX_STATES) 12208b888c66SNate Lawson return; 12218b888c66SNate Lawson 122230bf6110SAndriy Gapon /* 122330bf6110SAndriy Gapon * C-state data for target CPU is going to be in flux while we execute 122430bf6110SAndriy Gapon * acpi_cpu_cx_cst, so disable entering acpi_cpu_idle. 122530bf6110SAndriy Gapon * Also, it may happen that multiple ACPI taskqueues may concurrently 122630bf6110SAndriy Gapon * execute notifications for the same CPU. ACPI_SERIAL is used to 122730bf6110SAndriy Gapon * protect against that. 122830bf6110SAndriy Gapon */ 122930bf6110SAndriy Gapon ACPI_SERIAL_BEGIN(cpu); 123030bf6110SAndriy Gapon disable_idle(sc); 123130bf6110SAndriy Gapon 123289ab2a7aSRui Paulo /* Update the list of Cx states. */ 123389ab2a7aSRui Paulo acpi_cpu_cx_cst(sc); 123489ab2a7aSRui Paulo acpi_cpu_cx_list(sc); 1235d30b88afSAndriy Gapon acpi_cpu_set_cx_lowest(sc); 123630bf6110SAndriy Gapon 123730bf6110SAndriy Gapon enable_idle(sc); 123889ab2a7aSRui Paulo ACPI_SERIAL_END(cpu); 1239154fc7b6SAndriy Gapon 1240154fc7b6SAndriy Gapon acpi_UserNotify("PROCESSOR", sc->cpu_handle, notify); 12416b74f9b7SNate Lawson } 12426b74f9b7SNate Lawson 12439cf4cabeSJung-uk Kim static void 1244907b6777SNate Lawson acpi_cpu_quirks(void) 12456b74f9b7SNate Lawson { 12467826bf98SNate Lawson ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 12477826bf98SNate Lawson 12486b74f9b7SNate Lawson /* 1249907b6777SNate Lawson * Bus mastering arbitration control is needed to keep caches coherent 1250907b6777SNate Lawson * while sleeping in C3. If it's not present but a working flush cache 1251907b6777SNate Lawson * instruction is present, flush the caches before entering C3 instead. 1252907b6777SNate Lawson * Otherwise, just disable C3 completely. 12536b74f9b7SNate Lawson */ 12542be4e471SJung-uk Kim if (AcpiGbl_FADT.Pm2ControlBlock == 0 || 12552be4e471SJung-uk Kim AcpiGbl_FADT.Pm2ControlLength == 0) { 12562be4e471SJung-uk Kim if ((AcpiGbl_FADT.Flags & ACPI_FADT_WBINVD) && 12572be4e471SJung-uk Kim (AcpiGbl_FADT.Flags & ACPI_FADT_WBINVD_FLUSH) == 0) { 1258907b6777SNate Lawson cpu_quirks |= CPU_QUIRK_NO_BM_CTRL; 1259907b6777SNate Lawson ACPI_DEBUG_PRINT((ACPI_DB_INFO, 126030dd6af3SNate Lawson "acpi_cpu: no BM control, using flush cache method\n")); 1261907b6777SNate Lawson } else { 1262907b6777SNate Lawson cpu_quirks |= CPU_QUIRK_NO_C3; 1263907b6777SNate Lawson ACPI_DEBUG_PRINT((ACPI_DB_INFO, 126430dd6af3SNate Lawson "acpi_cpu: no BM control, C3 not available\n")); 1265907b6777SNate Lawson } 1266907b6777SNate Lawson } 1267907b6777SNate Lawson 1268907b6777SNate Lawson /* 1269907b6777SNate Lawson * If we are using generic Cx mode, C3 on multiple CPUs requires using 1270907b6777SNate Lawson * the expensive flush cache instruction. 1271907b6777SNate Lawson */ 127230dd6af3SNate Lawson if (cpu_cx_generic && mp_ncpus > 1) { 127318ececa0SNate Lawson cpu_quirks |= CPU_QUIRK_NO_BM_CTRL; 127430dd6af3SNate Lawson ACPI_DEBUG_PRINT((ACPI_DB_INFO, 127530dd6af3SNate Lawson "acpi_cpu: SMP, using flush cache mode for C3\n")); 127630dd6af3SNate Lawson } 12776b74f9b7SNate Lawson 12786b74f9b7SNate Lawson /* Look for various quirks of the PIIX4 part. */ 12799cf4cabeSJung-uk Kim acpi_cpu_quirks_piix4(); 12809cf4cabeSJung-uk Kim } 12819cf4cabeSJung-uk Kim 12829cf4cabeSJung-uk Kim static void 12839cf4cabeSJung-uk Kim acpi_cpu_quirks_piix4(void) 12849cf4cabeSJung-uk Kim { 12859cf4cabeSJung-uk Kim #ifdef __i386__ 12869cf4cabeSJung-uk Kim device_t acpi_dev; 12879cf4cabeSJung-uk Kim uint32_t val; 12889cf4cabeSJung-uk Kim 12896b74f9b7SNate Lawson acpi_dev = pci_find_device(PCI_VENDOR_INTEL, PCI_DEVICE_82371AB_3); 12906b74f9b7SNate Lawson if (acpi_dev != NULL) { 12916b74f9b7SNate Lawson switch (pci_get_revid(acpi_dev)) { 12926b74f9b7SNate Lawson /* 12936b74f9b7SNate Lawson * Disable C3 support for all PIIX4 chipsets. Some of these parts 12946b74f9b7SNate Lawson * do not report the BMIDE status to the BM status register and 12956b74f9b7SNate Lawson * others have a livelock bug if Type-F DMA is enabled. Linux 12966b74f9b7SNate Lawson * works around the BMIDE bug by reading the BM status directly 12976b74f9b7SNate Lawson * but we take the simpler approach of disabling C3 for these 12986b74f9b7SNate Lawson * parts. 12996b74f9b7SNate Lawson * 13006b74f9b7SNate Lawson * See erratum #18 ("C3 Power State/BMIDE and Type-F DMA 13016b74f9b7SNate Lawson * Livelock") from the January 2002 PIIX4 specification update. 13026b74f9b7SNate Lawson * Applies to all PIIX4 models. 13038a000acaSRui Paulo * 13048a000acaSRui Paulo * Also, make sure that all interrupts cause a "Stop Break" 13058a000acaSRui Paulo * event to exit from C2 state. 1306f1e1ddc3SAndriy Gapon * Also, BRLD_EN_BM (ACPI_BITREG_BUS_MASTER_RLD in ACPI-speak) 1307f1e1ddc3SAndriy Gapon * should be set to zero, otherwise it causes C2 to short-sleep. 1308f1e1ddc3SAndriy Gapon * PIIX4 doesn't properly support C3 and bus master activity 1309f1e1ddc3SAndriy Gapon * need not break out of C2. 13106b74f9b7SNate Lawson */ 13118a000acaSRui Paulo case PCI_REVISION_A_STEP: 13128a000acaSRui Paulo case PCI_REVISION_B_STEP: 13136b74f9b7SNate Lawson case PCI_REVISION_4E: 13146b74f9b7SNate Lawson case PCI_REVISION_4M: 13156b74f9b7SNate Lawson cpu_quirks |= CPU_QUIRK_NO_C3; 131630dd6af3SNate Lawson ACPI_DEBUG_PRINT((ACPI_DB_INFO, 131730dd6af3SNate Lawson "acpi_cpu: working around PIIX4 bug, disabling C3\n")); 13188a000acaSRui Paulo 13198a000acaSRui Paulo val = pci_read_config(acpi_dev, PIIX4_DEVACTB_REG, 4); 13208a000acaSRui Paulo if ((val & PIIX4_STOP_BREAK_MASK) != PIIX4_STOP_BREAK_MASK) { 13218a000acaSRui Paulo ACPI_DEBUG_PRINT((ACPI_DB_INFO, 1322f1e1ddc3SAndriy Gapon "acpi_cpu: PIIX4: enabling IRQs to generate Stop Break\n")); 13238a000acaSRui Paulo val |= PIIX4_STOP_BREAK_MASK; 13248a000acaSRui Paulo pci_write_config(acpi_dev, PIIX4_DEVACTB_REG, val, 4); 13258a000acaSRui Paulo } 1326129d3046SJung-uk Kim AcpiReadBitRegister(ACPI_BITREG_BUS_MASTER_RLD, &val); 1327f1e1ddc3SAndriy Gapon if (val) { 1328f1e1ddc3SAndriy Gapon ACPI_DEBUG_PRINT((ACPI_DB_INFO, 1329f1e1ddc3SAndriy Gapon "acpi_cpu: PIIX4: reset BRLD_EN_BM\n")); 1330129d3046SJung-uk Kim AcpiWriteBitRegister(ACPI_BITREG_BUS_MASTER_RLD, 0); 1331f1e1ddc3SAndriy Gapon } 13326b74f9b7SNate Lawson break; 13336b74f9b7SNate Lawson default: 13346b74f9b7SNate Lawson break; 13356b74f9b7SNate Lawson } 13366b74f9b7SNate Lawson } 13379cf4cabeSJung-uk Kim #endif 13386b74f9b7SNate Lawson } 13396b74f9b7SNate Lawson 13406b74f9b7SNate Lawson static int 1341a2afe45aSNate Lawson acpi_cpu_usage_sysctl(SYSCTL_HANDLER_ARGS) 13426b74f9b7SNate Lawson { 1343907b6777SNate Lawson struct acpi_cpu_softc *sc; 13446b74f9b7SNate Lawson struct sbuf sb; 13456b74f9b7SNate Lawson char buf[128]; 13466b74f9b7SNate Lawson int i; 13474a03551dSNate Lawson uintmax_t fract, sum, whole; 13486b74f9b7SNate Lawson 1349907b6777SNate Lawson sc = (struct acpi_cpu_softc *) arg1; 13503e7fa136SNate Lawson sum = 0; 1351907b6777SNate Lawson for (i = 0; i < sc->cpu_cx_count; i++) 1352907b6777SNate Lawson sum += sc->cpu_cx_stats[i]; 13536b74f9b7SNate Lawson sbuf_new(&sb, buf, sizeof(buf), SBUF_FIXEDLEN); 1354907b6777SNate Lawson for (i = 0; i < sc->cpu_cx_count; i++) { 13553e7fa136SNate Lawson if (sum > 0) { 1356907b6777SNate Lawson whole = (uintmax_t)sc->cpu_cx_stats[i] * 100; 13573e7fa136SNate Lawson fract = (whole % sum) * 100; 13583e7fa136SNate Lawson sbuf_printf(&sb, "%u.%02u%% ", (u_int)(whole / sum), 13593e7fa136SNate Lawson (u_int)(fract / sum)); 13603e7fa136SNate Lawson } else 13612500b6d9SAlexander Motin sbuf_printf(&sb, "0.00%% "); 13623e7fa136SNate Lawson } 13632500b6d9SAlexander Motin sbuf_printf(&sb, "last %dus", sc->cpu_prev_sleep); 13646b74f9b7SNate Lawson sbuf_trim(&sb); 13656b74f9b7SNate Lawson sbuf_finish(&sb); 1366ccc09458SNate Lawson sysctl_handle_string(oidp, sbuf_data(&sb), sbuf_len(&sb), req); 1367ccc09458SNate Lawson sbuf_delete(&sb); 13686b74f9b7SNate Lawson 13696b74f9b7SNate Lawson return (0); 13706b74f9b7SNate Lawson } 13716b74f9b7SNate Lawson 13720d470054SAdrian Chadd /* 13730d470054SAdrian Chadd * XXX TODO: actually add support to count each entry/exit 13740d470054SAdrian Chadd * from the Cx states. 13750d470054SAdrian Chadd */ 13760d470054SAdrian Chadd static int 13770d470054SAdrian Chadd acpi_cpu_usage_counters_sysctl(SYSCTL_HANDLER_ARGS) 13780d470054SAdrian Chadd { 13790d470054SAdrian Chadd struct acpi_cpu_softc *sc; 13800d470054SAdrian Chadd struct sbuf sb; 13810d470054SAdrian Chadd char buf[128]; 13820d470054SAdrian Chadd int i; 13830d470054SAdrian Chadd 13840d470054SAdrian Chadd sc = (struct acpi_cpu_softc *) arg1; 13850d470054SAdrian Chadd 13860d470054SAdrian Chadd /* Print out the raw counters */ 13870d470054SAdrian Chadd sbuf_new(&sb, buf, sizeof(buf), SBUF_FIXEDLEN); 13880d470054SAdrian Chadd 13890d470054SAdrian Chadd for (i = 0; i < sc->cpu_cx_count; i++) { 13900d470054SAdrian Chadd sbuf_printf(&sb, "%u ", sc->cpu_cx_stats[i]); 13910d470054SAdrian Chadd } 13920d470054SAdrian Chadd 13930d470054SAdrian Chadd sbuf_trim(&sb); 13940d470054SAdrian Chadd sbuf_finish(&sb); 13950d470054SAdrian Chadd sysctl_handle_string(oidp, sbuf_data(&sb), sbuf_len(&sb), req); 13960d470054SAdrian Chadd sbuf_delete(&sb); 13970d470054SAdrian Chadd 13980d470054SAdrian Chadd return (0); 13990d470054SAdrian Chadd } 14000d470054SAdrian Chadd 1401b57a73f8SKonstantin Belousov #if defined(__i386__) || defined(__amd64__) 1402b57a73f8SKonstantin Belousov static int 1403b57a73f8SKonstantin Belousov acpi_cpu_method_sysctl(SYSCTL_HANDLER_ARGS) 1404b57a73f8SKonstantin Belousov { 1405b57a73f8SKonstantin Belousov struct acpi_cpu_softc *sc; 1406b57a73f8SKonstantin Belousov struct acpi_cx *cx; 1407b57a73f8SKonstantin Belousov struct sbuf sb; 1408b57a73f8SKonstantin Belousov char buf[128]; 1409b57a73f8SKonstantin Belousov int i; 1410b57a73f8SKonstantin Belousov 1411b57a73f8SKonstantin Belousov sc = (struct acpi_cpu_softc *)arg1; 1412b57a73f8SKonstantin Belousov sbuf_new(&sb, buf, sizeof(buf), SBUF_FIXEDLEN); 1413b57a73f8SKonstantin Belousov for (i = 0; i < sc->cpu_cx_count; i++) { 1414b57a73f8SKonstantin Belousov cx = &sc->cpu_cx_states[i]; 1415b57a73f8SKonstantin Belousov sbuf_printf(&sb, "C%d/", i + 1); 1416b57a73f8SKonstantin Belousov if (cx->do_mwait) { 1417b57a73f8SKonstantin Belousov sbuf_cat(&sb, "mwait"); 1418b57a73f8SKonstantin Belousov if (cx->mwait_hw_coord) 1419b57a73f8SKonstantin Belousov sbuf_cat(&sb, "/hwc"); 1420b57a73f8SKonstantin Belousov if (cx->mwait_bm_avoidance) 1421b57a73f8SKonstantin Belousov sbuf_cat(&sb, "/bma"); 1422b57a73f8SKonstantin Belousov } else if (cx->type == ACPI_STATE_C1) { 1423b57a73f8SKonstantin Belousov sbuf_cat(&sb, "hlt"); 1424b57a73f8SKonstantin Belousov } else { 1425b57a73f8SKonstantin Belousov sbuf_cat(&sb, "io"); 1426b57a73f8SKonstantin Belousov } 1427b57a73f8SKonstantin Belousov if (cx->type == ACPI_STATE_C1 && cx->p_lvlx != NULL) 1428b57a73f8SKonstantin Belousov sbuf_cat(&sb, "/iohlt"); 1429b57a73f8SKonstantin Belousov sbuf_putc(&sb, ' '); 1430b57a73f8SKonstantin Belousov } 1431b57a73f8SKonstantin Belousov sbuf_trim(&sb); 1432b57a73f8SKonstantin Belousov sbuf_finish(&sb); 1433b57a73f8SKonstantin Belousov sysctl_handle_string(oidp, sbuf_data(&sb), sbuf_len(&sb), req); 1434b57a73f8SKonstantin Belousov sbuf_delete(&sb); 1435b57a73f8SKonstantin Belousov return (0); 1436b57a73f8SKonstantin Belousov } 1437b57a73f8SKonstantin Belousov #endif 1438b57a73f8SKonstantin Belousov 14396b74f9b7SNate Lawson static int 1440d30b88afSAndriy Gapon acpi_cpu_set_cx_lowest(struct acpi_cpu_softc *sc) 14416b74f9b7SNate Lawson { 1442b13cf774SNate Lawson int i; 14436b74f9b7SNate Lawson 1444b13cf774SNate Lawson ACPI_SERIAL_ASSERT(cpu); 1445d30b88afSAndriy Gapon sc->cpu_cx_lowest = min(sc->cpu_cx_lowest_lim, sc->cpu_cx_count - 1); 1446907b6777SNate Lawson 1447907b6777SNate Lawson /* If not disabling, cache the new lowest non-C3 state. */ 1448907b6777SNate Lawson sc->cpu_non_c3 = 0; 1449907b6777SNate Lawson for (i = sc->cpu_cx_lowest; i >= 0; i--) { 1450907b6777SNate Lawson if (sc->cpu_cx_states[i].type < ACPI_STATE_C3) { 1451907b6777SNate Lawson sc->cpu_non_c3 = i; 1452907b6777SNate Lawson break; 1453907b6777SNate Lawson } 1454907b6777SNate Lawson } 1455907b6777SNate Lawson 1456907b6777SNate Lawson /* Reset the statistics counters. */ 1457907b6777SNate Lawson bzero(sc->cpu_cx_stats, sizeof(sc->cpu_cx_stats)); 1458b13cf774SNate Lawson return (0); 1459b13cf774SNate Lawson } 1460b13cf774SNate Lawson 1461b13cf774SNate Lawson static int 1462b13cf774SNate Lawson acpi_cpu_cx_lowest_sysctl(SYSCTL_HANDLER_ARGS) 1463b13cf774SNate Lawson { 1464b13cf774SNate Lawson struct acpi_cpu_softc *sc; 1465b13cf774SNate Lawson char state[8]; 1466b13cf774SNate Lawson int val, error; 1467b13cf774SNate Lawson 1468b13cf774SNate Lawson sc = (struct acpi_cpu_softc *) arg1; 1469d30b88afSAndriy Gapon snprintf(state, sizeof(state), "C%d", sc->cpu_cx_lowest_lim + 1); 1470b13cf774SNate Lawson error = sysctl_handle_string(oidp, state, sizeof(state), req); 1471b13cf774SNate Lawson if (error != 0 || req->newptr == NULL) 1472b13cf774SNate Lawson return (error); 1473b13cf774SNate Lawson if (strlen(state) < 2 || toupper(state[0]) != 'C') 1474b13cf774SNate Lawson return (EINVAL); 1475d30b88afSAndriy Gapon if (strcasecmp(state, "Cmax") == 0) 1476d30b88afSAndriy Gapon val = MAX_CX_STATES; 1477d30b88afSAndriy Gapon else { 1478d30b88afSAndriy Gapon val = (int) strtol(state + 1, NULL, 10); 1479d30b88afSAndriy Gapon if (val < 1 || val > MAX_CX_STATES) 1480b13cf774SNate Lawson return (EINVAL); 1481d30b88afSAndriy Gapon } 1482b13cf774SNate Lawson 1483b13cf774SNate Lawson ACPI_SERIAL_BEGIN(cpu); 1484d30b88afSAndriy Gapon sc->cpu_cx_lowest_lim = val - 1; 1485d30b88afSAndriy Gapon acpi_cpu_set_cx_lowest(sc); 1486907b6777SNate Lawson ACPI_SERIAL_END(cpu); 1487907b6777SNate Lawson 148855fb7f36SSean Bruno return (0); 1489907b6777SNate Lawson } 1490907b6777SNate Lawson 1491907b6777SNate Lawson static int 1492907b6777SNate Lawson acpi_cpu_global_cx_lowest_sysctl(SYSCTL_HANDLER_ARGS) 1493907b6777SNate Lawson { 1494907b6777SNate Lawson struct acpi_cpu_softc *sc; 1495907b6777SNate Lawson char state[8]; 1496b13cf774SNate Lawson int val, error, i; 1497907b6777SNate Lawson 1498d30b88afSAndriy Gapon snprintf(state, sizeof(state), "C%d", cpu_cx_lowest_lim + 1); 1499ccc09458SNate Lawson error = sysctl_handle_string(oidp, state, sizeof(state), req); 15006b74f9b7SNate Lawson if (error != 0 || req->newptr == NULL) 15016b74f9b7SNate Lawson return (error); 1502ccc09458SNate Lawson if (strlen(state) < 2 || toupper(state[0]) != 'C') 1503ccc09458SNate Lawson return (EINVAL); 1504d30b88afSAndriy Gapon if (strcasecmp(state, "Cmax") == 0) 1505d30b88afSAndriy Gapon val = MAX_CX_STATES; 1506d30b88afSAndriy Gapon else { 1507d30b88afSAndriy Gapon val = (int) strtol(state + 1, NULL, 10); 1508d30b88afSAndriy Gapon if (val < 1 || val > MAX_CX_STATES) 15096b74f9b7SNate Lawson return (EINVAL); 1510d30b88afSAndriy Gapon } 15116b74f9b7SNate Lawson 1512b13cf774SNate Lawson /* Update the new lowest useable Cx state for all CPUs. */ 1513907b6777SNate Lawson ACPI_SERIAL_BEGIN(cpu); 1514d30b88afSAndriy Gapon cpu_cx_lowest_lim = val - 1; 1515907b6777SNate Lawson for (i = 0; i < cpu_ndevices; i++) { 1516907b6777SNate Lawson sc = device_get_softc(cpu_devices[i]); 1517d30b88afSAndriy Gapon sc->cpu_cx_lowest_lim = cpu_cx_lowest_lim; 1518d30b88afSAndriy Gapon acpi_cpu_set_cx_lowest(sc); 1519907b6777SNate Lawson } 1520d92a2ebdSNate Lawson ACPI_SERIAL_END(cpu); 15216b74f9b7SNate Lawson 15226b74f9b7SNate Lawson return (0); 15236b74f9b7SNate Lawson } 1524