15db2f26eSSascha Wildner /*- 25db2f26eSSascha Wildner * Copyright (c) 2003-2005 Nate Lawson (SDG) 35db2f26eSSascha Wildner * Copyright (c) 2001 Michael Smith 45db2f26eSSascha Wildner * All rights reserved. 55db2f26eSSascha Wildner * 65db2f26eSSascha Wildner * Redistribution and use in source and binary forms, with or without 75db2f26eSSascha Wildner * modification, are permitted provided that the following conditions 85db2f26eSSascha Wildner * are met: 95db2f26eSSascha Wildner * 1. Redistributions of source code must retain the above copyright 105db2f26eSSascha Wildner * notice, this list of conditions and the following disclaimer. 115db2f26eSSascha Wildner * 2. Redistributions in binary form must reproduce the above copyright 125db2f26eSSascha Wildner * notice, this list of conditions and the following disclaimer in the 135db2f26eSSascha Wildner * documentation and/or other materials provided with the distribution. 145db2f26eSSascha Wildner * 155db2f26eSSascha Wildner * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 165db2f26eSSascha Wildner * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 175db2f26eSSascha Wildner * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 185db2f26eSSascha Wildner * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 195db2f26eSSascha Wildner * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 205db2f26eSSascha Wildner * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 215db2f26eSSascha Wildner * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 225db2f26eSSascha Wildner * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 235db2f26eSSascha Wildner * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 245db2f26eSSascha Wildner * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 255db2f26eSSascha Wildner * SUCH DAMAGE. 265db2f26eSSascha Wildner * 275db2f26eSSascha Wildner * $FreeBSD: src/sys/dev/acpica/acpi_cpu.c,v 1.72 2008/04/12 12:06:00 rpaulo Exp $ 285db2f26eSSascha Wildner */ 295db2f26eSSascha Wildner 305db2f26eSSascha Wildner #include "opt_acpi.h" 315db2f26eSSascha Wildner #include <sys/param.h> 325db2f26eSSascha Wildner #include <sys/bus.h> 335db2f26eSSascha Wildner #include <sys/kernel.h> 345db2f26eSSascha Wildner #include <sys/malloc.h> 355db2f26eSSascha Wildner #include <sys/globaldata.h> 365db2f26eSSascha Wildner #include <sys/power.h> 375db2f26eSSascha Wildner #include <sys/proc.h> 385db2f26eSSascha Wildner #include <sys/sbuf.h> 395db2f26eSSascha Wildner #include <sys/thread2.h> 40b45624acSSepherosa Ziehau #include <sys/serialize.h> 41c241507cSSepherosa Ziehau #include <sys/msgport2.h> 425db2f26eSSascha Wildner 435db2f26eSSascha Wildner #include <bus/pci/pcivar.h> 445db2f26eSSascha Wildner #include <machine/atomic.h> 455db2f26eSSascha Wildner #include <machine/globaldata.h> 465db2f26eSSascha Wildner #include <machine/md_var.h> 475db2f26eSSascha Wildner #include <machine/smp.h> 485db2f26eSSascha Wildner #include <sys/rman.h> 495db2f26eSSascha Wildner 50c241507cSSepherosa Ziehau #include <net/netisr2.h> 51c241507cSSepherosa Ziehau #include <net/netmsg2.h> 52c241507cSSepherosa Ziehau #include <net/if_var.h> 53c241507cSSepherosa Ziehau 545db2f26eSSascha Wildner #include "acpi.h" 555db2f26eSSascha Wildner #include "acpivar.h" 565db2f26eSSascha Wildner #include "acpi_cpu.h" 575db2f26eSSascha Wildner 585db2f26eSSascha Wildner /* 595db2f26eSSascha Wildner * Support for ACPI Processor devices, including C[1-3] sleep states. 605db2f26eSSascha Wildner */ 615db2f26eSSascha Wildner 625db2f26eSSascha Wildner /* Hooks for the ACPI CA debugging infrastructure */ 635db2f26eSSascha Wildner #define _COMPONENT ACPI_PROCESSOR 645db2f26eSSascha Wildner ACPI_MODULE_NAME("PROCESSOR") 655db2f26eSSascha Wildner 66c241507cSSepherosa Ziehau struct netmsg_acpi_cst { 67c241507cSSepherosa Ziehau struct netmsg_base base; 684eee58faSSepherosa Ziehau struct acpi_cst_softc *sc; 69c241507cSSepherosa Ziehau int val; 70c241507cSSepherosa Ziehau }; 71c241507cSSepherosa Ziehau 725db2f26eSSascha Wildner struct acpi_cx { 735db2f26eSSascha Wildner struct resource *p_lvlx; /* Register to read to enter state. */ 745db2f26eSSascha Wildner int rid; /* rid of p_lvlx */ 755db2f26eSSascha Wildner uint32_t type; /* C1-3 (C4 and up treated as C3). */ 765db2f26eSSascha Wildner uint32_t trans_lat; /* Transition latency (usec). */ 775db2f26eSSascha Wildner uint32_t power; /* Power consumed (mW). */ 785db2f26eSSascha Wildner int res_type; /* Resource type for p_lvlx. */ 795db2f26eSSascha Wildner }; 805db2f26eSSascha Wildner #define MAX_CX_STATES 8 815db2f26eSSascha Wildner 824eee58faSSepherosa Ziehau struct acpi_cst_softc { 834eee58faSSepherosa Ziehau device_t cst_dev; 844eee58faSSepherosa Ziehau struct acpi_cpux_softc *cst_parent; 854eee58faSSepherosa Ziehau ACPI_HANDLE cst_handle; 864eee58faSSepherosa Ziehau int cst_cpuid; 8744806d43SSepherosa Ziehau uint32_t cst_flags; /* ACPI_CST_FLAG_ */ 884eee58faSSepherosa Ziehau uint32_t cst_p_blk; /* ACPI P_BLK location */ 894eee58faSSepherosa Ziehau uint32_t cst_p_blk_len; /* P_BLK length (must be 6). */ 904eee58faSSepherosa Ziehau struct acpi_cx cst_cx_states[MAX_CX_STATES]; 914eee58faSSepherosa Ziehau int cst_cx_count; /* Number of valid Cx states. */ 924eee58faSSepherosa Ziehau int cst_prev_sleep;/* Last idle sleep duration. */ 935db2f26eSSascha Wildner /* Runtime state. */ 944eee58faSSepherosa Ziehau int cst_non_c3; /* Index of lowest non-C3 state. */ 954eee58faSSepherosa Ziehau u_long cst_cx_stats[MAX_CX_STATES];/* Cx usage history. */ 965db2f26eSSascha Wildner /* Values for sysctl. */ 974eee58faSSepherosa Ziehau int cst_cx_lowest; /* Current Cx lowest */ 984eee58faSSepherosa Ziehau int cst_cx_lowest_req; /* Requested Cx lowest */ 994eee58faSSepherosa Ziehau char cst_cx_supported[64]; 1005db2f26eSSascha Wildner }; 1015db2f26eSSascha Wildner 10244806d43SSepherosa Ziehau #define ACPI_CST_FLAG_PROBING 0x1 10344806d43SSepherosa Ziehau 1045db2f26eSSascha Wildner #define CPU_GET_REG(reg, width) \ 1055db2f26eSSascha Wildner (bus_space_read_ ## width(rman_get_bustag((reg)), \ 1065db2f26eSSascha Wildner rman_get_bushandle((reg)), 0)) 1075db2f26eSSascha Wildner 1085db2f26eSSascha Wildner #define PM_USEC(x) ((x) >> 2) /* ~4 clocks per usec (3.57955 Mhz) */ 1095db2f26eSSascha Wildner 1105db2f26eSSascha Wildner #define CPU_QUIRK_NO_C3 (1<<0) /* C3-type states are not usable. */ 1115db2f26eSSascha Wildner #define CPU_QUIRK_NO_BM_CTRL (1<<2) /* No bus mastering control. */ 1125db2f26eSSascha Wildner 1135db2f26eSSascha Wildner #define PCI_VENDOR_INTEL 0x8086 1145db2f26eSSascha Wildner #define PCI_DEVICE_82371AB_3 0x7113 /* PIIX4 chipset for quirks. */ 1155db2f26eSSascha Wildner #define PCI_REVISION_A_STEP 0 1165db2f26eSSascha Wildner #define PCI_REVISION_B_STEP 1 1175db2f26eSSascha Wildner #define PCI_REVISION_4E 2 1185db2f26eSSascha Wildner #define PCI_REVISION_4M 3 1195db2f26eSSascha Wildner #define PIIX4_DEVACTB_REG 0x58 1205db2f26eSSascha Wildner #define PIIX4_BRLD_EN_IRQ0 (1<<0) 1215db2f26eSSascha Wildner #define PIIX4_BRLD_EN_IRQ (1<<1) 1225db2f26eSSascha Wildner #define PIIX4_BRLD_EN_IRQ8 (1<<5) 1235db2f26eSSascha Wildner #define PIIX4_STOP_BREAK_MASK (PIIX4_BRLD_EN_IRQ0 | PIIX4_BRLD_EN_IRQ | PIIX4_BRLD_EN_IRQ8) 1245db2f26eSSascha Wildner #define PIIX4_PCNTRL_BST_EN (1<<10) 1255db2f26eSSascha Wildner 1265db2f26eSSascha Wildner /* Platform hardware resource information. */ 1275db2f26eSSascha Wildner static uint32_t cpu_smi_cmd; /* Value to write to SMI_CMD. */ 1285db2f26eSSascha Wildner static uint8_t cpu_cst_cnt; /* Indicate we are _CST aware. */ 1295db2f26eSSascha Wildner static int cpu_quirks; /* Indicate any hardware bugs. */ 1305db2f26eSSascha Wildner 1315db2f26eSSascha Wildner /* Runtime state. */ 1325db2f26eSSascha Wildner static int cpu_disable_idle; /* Disable entry to idle function */ 1335db2f26eSSascha Wildner static int cpu_cx_count; /* Number of valid Cx states */ 1345db2f26eSSascha Wildner 1355db2f26eSSascha Wildner /* Values for sysctl. */ 1365db2f26eSSascha Wildner static int cpu_cx_generic; 1371d730338SSepherosa Ziehau static int cpu_cx_lowest; /* Current Cx lowest */ 1381d730338SSepherosa Ziehau static int cpu_cx_lowest_req; /* Requested Cx lowest */ 139b45624acSSepherosa Ziehau static struct lwkt_serialize cpu_cx_slize = LWKT_SERIALIZE_INITIALIZER; 1405db2f26eSSascha Wildner 1415db2f26eSSascha Wildner /* C3 state transition */ 1425db2f26eSSascha Wildner static int cpu_c3_ncpus; 1435db2f26eSSascha Wildner 1445db2f26eSSascha Wildner static device_t *cpu_devices; 1455db2f26eSSascha Wildner static int cpu_ndevices; 1464eee58faSSepherosa Ziehau static struct acpi_cst_softc **cpu_softc; 1475db2f26eSSascha Wildner 14892c9201cSSepherosa Ziehau static int acpi_cst_probe(device_t dev); 14992c9201cSSepherosa Ziehau static int acpi_cst_attach(device_t dev); 15092c9201cSSepherosa Ziehau static int acpi_cst_suspend(device_t dev); 15192c9201cSSepherosa Ziehau static int acpi_cst_resume(device_t dev); 15292c9201cSSepherosa Ziehau static int acpi_cst_shutdown(device_t dev); 153ac13872aSSepherosa Ziehau 1544eee58faSSepherosa Ziehau static void acpi_cpu_cx_probe(struct acpi_cst_softc *sc); 1554eee58faSSepherosa Ziehau static void acpi_cpu_generic_cx_probe(struct acpi_cst_softc *sc); 1564eee58faSSepherosa Ziehau static int acpi_cpu_cx_cst(struct acpi_cst_softc *sc); 1574eee58faSSepherosa Ziehau static int acpi_cpu_cx_cst_dispatch(struct acpi_cst_softc *sc); 1585db2f26eSSascha Wildner static void acpi_cpu_startup(void *arg); 1594eee58faSSepherosa Ziehau static void acpi_cpu_startup_cx(struct acpi_cst_softc *sc); 1604eee58faSSepherosa Ziehau static void acpi_cpu_cx_list(struct acpi_cst_softc *sc); 1615db2f26eSSascha Wildner static void acpi_cpu_idle(void); 1625db2f26eSSascha Wildner static void acpi_cpu_cst_notify(device_t); 1635db2f26eSSascha Wildner static int acpi_cpu_quirks(void); 1645db2f26eSSascha Wildner static int acpi_cpu_usage_sysctl(SYSCTL_HANDLER_ARGS); 1654eee58faSSepherosa Ziehau static int acpi_cpu_set_cx_lowest(struct acpi_cst_softc *, int); 1664eee58faSSepherosa Ziehau static int acpi_cpu_set_cx_lowest_oncpu(struct acpi_cst_softc *, int); 1675db2f26eSSascha Wildner static int acpi_cpu_cx_lowest_sysctl(SYSCTL_HANDLER_ARGS); 1681d730338SSepherosa Ziehau static int acpi_cpu_cx_lowest_use_sysctl(SYSCTL_HANDLER_ARGS); 1695db2f26eSSascha Wildner static int acpi_cpu_global_cx_lowest_sysctl(SYSCTL_HANDLER_ARGS); 1701d730338SSepherosa Ziehau static int acpi_cpu_global_cx_lowest_use_sysctl(SYSCTL_HANDLER_ARGS); 1714eee58faSSepherosa Ziehau static void acpi_cpu_cx_non_c3(struct acpi_cst_softc *sc); 1724cf48621SSepherosa Ziehau static void acpi_cpu_global_cx_count(void); 1735db2f26eSSascha Wildner 1745db2f26eSSascha Wildner static void acpi_cpu_c1(void); /* XXX */ 1755db2f26eSSascha Wildner 176*41e658a2SSepherosa Ziehau static device_method_t acpi_cst_methods[] = { 1775db2f26eSSascha Wildner /* Device interface */ 17892c9201cSSepherosa Ziehau DEVMETHOD(device_probe, acpi_cst_probe), 17992c9201cSSepherosa Ziehau DEVMETHOD(device_attach, acpi_cst_attach), 1805db2f26eSSascha Wildner DEVMETHOD(device_detach, bus_generic_detach), 18192c9201cSSepherosa Ziehau DEVMETHOD(device_shutdown, acpi_cst_shutdown), 18292c9201cSSepherosa Ziehau DEVMETHOD(device_suspend, acpi_cst_suspend), 18392c9201cSSepherosa Ziehau DEVMETHOD(device_resume, acpi_cst_resume), 1845db2f26eSSascha Wildner 1855db2f26eSSascha Wildner /* Bus interface */ 186ac13872aSSepherosa Ziehau DEVMETHOD(bus_add_child, bus_generic_add_child), 187ac13872aSSepherosa Ziehau DEVMETHOD(bus_read_ivar, bus_generic_read_ivar), 188ac13872aSSepherosa Ziehau DEVMETHOD(bus_get_resource_list, bus_generic_get_resource_list), 1895db2f26eSSascha Wildner DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource), 1905db2f26eSSascha Wildner DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource), 1915db2f26eSSascha Wildner DEVMETHOD(bus_alloc_resource, bus_generic_rl_alloc_resource), 1925db2f26eSSascha Wildner DEVMETHOD(bus_release_resource, bus_generic_rl_release_resource), 1935db2f26eSSascha Wildner DEVMETHOD(bus_driver_added, bus_generic_driver_added), 1945db2f26eSSascha Wildner DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 1955db2f26eSSascha Wildner DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 1965db2f26eSSascha Wildner DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 1975db2f26eSSascha Wildner DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 198d3c9c58eSSascha Wildner DEVMETHOD_END 1995db2f26eSSascha Wildner }; 2005db2f26eSSascha Wildner 201*41e658a2SSepherosa Ziehau static driver_t acpi_cst_driver = { 2025db2f26eSSascha Wildner "cpu_cst", 203*41e658a2SSepherosa Ziehau acpi_cst_methods, 2044eee58faSSepherosa Ziehau sizeof(struct acpi_cst_softc), 2055db2f26eSSascha Wildner }; 2065db2f26eSSascha Wildner 207*41e658a2SSepherosa Ziehau static devclass_t acpi_cst_devclass; 208*41e658a2SSepherosa Ziehau DRIVER_MODULE(cpu_cst, cpu, acpi_cst_driver, acpi_cst_devclass, NULL, NULL); 2095db2f26eSSascha Wildner MODULE_DEPEND(cpu_cst, acpi, 1, 1, 1); 2105db2f26eSSascha Wildner 2115db2f26eSSascha Wildner static int 21292c9201cSSepherosa Ziehau acpi_cst_probe(device_t dev) 2135db2f26eSSascha Wildner { 2145db2f26eSSascha Wildner int cpu_id; 2155db2f26eSSascha Wildner 2165db2f26eSSascha Wildner if (acpi_disabled("cpu_cst") || acpi_get_type(dev) != ACPI_TYPE_PROCESSOR) 2175db2f26eSSascha Wildner return (ENXIO); 2185db2f26eSSascha Wildner 2195db2f26eSSascha Wildner cpu_id = acpi_get_magic(dev); 2205db2f26eSSascha Wildner 2215db2f26eSSascha Wildner if (cpu_softc == NULL) 2224eee58faSSepherosa Ziehau cpu_softc = kmalloc(sizeof(struct acpi_cst_softc *) * 2235db2f26eSSascha Wildner SMP_MAXCPU, M_TEMP /* XXX */, M_INTWAIT | M_ZERO); 2245db2f26eSSascha Wildner 2255db2f26eSSascha Wildner /* 2265db2f26eSSascha Wildner * Check if we already probed this processor. We scan the bus twice 2275db2f26eSSascha Wildner * so it's possible we've already seen this one. 2285db2f26eSSascha Wildner */ 2295db2f26eSSascha Wildner if (cpu_softc[cpu_id] != NULL) { 2305db2f26eSSascha Wildner device_printf(dev, "CPU%d cstate already exist\n", cpu_id); 2315db2f26eSSascha Wildner return (ENXIO); 2325db2f26eSSascha Wildner } 2335db2f26eSSascha Wildner 2345db2f26eSSascha Wildner /* Mark this processor as in-use and save our derived id for attach. */ 2355db2f26eSSascha Wildner cpu_softc[cpu_id] = (void *)1; 2365db2f26eSSascha Wildner device_set_desc(dev, "ACPI CPU C-State"); 2375db2f26eSSascha Wildner 2385db2f26eSSascha Wildner return (0); 2395db2f26eSSascha Wildner } 2405db2f26eSSascha Wildner 2415db2f26eSSascha Wildner static int 24292c9201cSSepherosa Ziehau acpi_cst_attach(device_t dev) 2435db2f26eSSascha Wildner { 2445db2f26eSSascha Wildner ACPI_BUFFER buf; 2455db2f26eSSascha Wildner ACPI_OBJECT *obj; 2464eee58faSSepherosa Ziehau struct acpi_cst_softc *sc; 2475db2f26eSSascha Wildner ACPI_STATUS status; 2485db2f26eSSascha Wildner 2495db2f26eSSascha Wildner ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2505db2f26eSSascha Wildner 2515db2f26eSSascha Wildner sc = device_get_softc(dev); 2524eee58faSSepherosa Ziehau sc->cst_dev = dev; 2534eee58faSSepherosa Ziehau sc->cst_parent = device_get_softc(device_get_parent(dev)); 2544eee58faSSepherosa Ziehau sc->cst_handle = acpi_get_handle(dev); 2554eee58faSSepherosa Ziehau sc->cst_cpuid = acpi_get_magic(dev); 2564eee58faSSepherosa Ziehau cpu_softc[sc->cst_cpuid] = sc; 2575db2f26eSSascha Wildner cpu_smi_cmd = AcpiGbl_FADT.SmiCommand; 2585db2f26eSSascha Wildner cpu_cst_cnt = AcpiGbl_FADT.CstControl; 2595db2f26eSSascha Wildner 2605db2f26eSSascha Wildner buf.Pointer = NULL; 2615db2f26eSSascha Wildner buf.Length = ACPI_ALLOCATE_BUFFER; 2624eee58faSSepherosa Ziehau status = AcpiEvaluateObject(sc->cst_handle, NULL, NULL, &buf); 2635db2f26eSSascha Wildner if (ACPI_FAILURE(status)) { 2645db2f26eSSascha Wildner device_printf(dev, "attach failed to get Processor obj - %s\n", 2655db2f26eSSascha Wildner AcpiFormatException(status)); 2665db2f26eSSascha Wildner return (ENXIO); 2675db2f26eSSascha Wildner } 2685db2f26eSSascha Wildner obj = (ACPI_OBJECT *)buf.Pointer; 2694eee58faSSepherosa Ziehau sc->cst_p_blk = obj->Processor.PblkAddress; 2704eee58faSSepherosa Ziehau sc->cst_p_blk_len = obj->Processor.PblkLength; 2715db2f26eSSascha Wildner AcpiOsFree(obj); 2725db2f26eSSascha Wildner ACPI_DEBUG_PRINT((ACPI_DB_INFO, "acpi_cpu%d: P_BLK at %#x/%d\n", 2734eee58faSSepherosa Ziehau device_get_unit(dev), sc->cst_p_blk, sc->cst_p_blk_len)); 2745db2f26eSSascha Wildner 2755db2f26eSSascha Wildner /* 2765db2f26eSSascha Wildner * If this is the first cpu we attach, create and initialize the generic 2775db2f26eSSascha Wildner * resources that will be used by all acpi cpu devices. 2785db2f26eSSascha Wildner */ 2795db2f26eSSascha Wildner if (device_get_unit(dev) == 0) { 2805db2f26eSSascha Wildner /* Assume we won't be using generic Cx mode by default */ 2815db2f26eSSascha Wildner cpu_cx_generic = FALSE; 2825db2f26eSSascha Wildner 2835db2f26eSSascha Wildner /* Queue post cpu-probing task handler */ 2845db2f26eSSascha Wildner AcpiOsExecute(OSL_NOTIFY_HANDLER, acpi_cpu_startup, NULL); 2855db2f26eSSascha Wildner } 2865db2f26eSSascha Wildner 2875db2f26eSSascha Wildner /* Probe for Cx state support. */ 2885db2f26eSSascha Wildner acpi_cpu_cx_probe(sc); 2895db2f26eSSascha Wildner 2905db2f26eSSascha Wildner /* Finally, call identify and probe/attach for child devices. */ 2915db2f26eSSascha Wildner bus_generic_probe(dev); 2925db2f26eSSascha Wildner bus_generic_attach(dev); 2935db2f26eSSascha Wildner 2945db2f26eSSascha Wildner return (0); 2955db2f26eSSascha Wildner } 2965db2f26eSSascha Wildner 2975db2f26eSSascha Wildner /* 2985db2f26eSSascha Wildner * Disable any entry to the idle function during suspend and re-enable it 2995db2f26eSSascha Wildner * during resume. 3005db2f26eSSascha Wildner */ 3015db2f26eSSascha Wildner static int 30292c9201cSSepherosa Ziehau acpi_cst_suspend(device_t dev) 3035db2f26eSSascha Wildner { 3045db2f26eSSascha Wildner int error; 3055db2f26eSSascha Wildner 3065db2f26eSSascha Wildner error = bus_generic_suspend(dev); 3075db2f26eSSascha Wildner if (error) 3085db2f26eSSascha Wildner return (error); 3095db2f26eSSascha Wildner cpu_disable_idle = TRUE; 3105db2f26eSSascha Wildner return (0); 3115db2f26eSSascha Wildner } 3125db2f26eSSascha Wildner 3135db2f26eSSascha Wildner static int 31492c9201cSSepherosa Ziehau acpi_cst_resume(device_t dev) 3155db2f26eSSascha Wildner { 3165db2f26eSSascha Wildner 3175db2f26eSSascha Wildner cpu_disable_idle = FALSE; 3185db2f26eSSascha Wildner return (bus_generic_resume(dev)); 3195db2f26eSSascha Wildner } 3205db2f26eSSascha Wildner 3215db2f26eSSascha Wildner static int 32292c9201cSSepherosa Ziehau acpi_cst_shutdown(device_t dev) 3235db2f26eSSascha Wildner { 3245db2f26eSSascha Wildner ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 3255db2f26eSSascha Wildner 3265db2f26eSSascha Wildner /* Allow children to shutdown first. */ 3275db2f26eSSascha Wildner bus_generic_shutdown(dev); 3285db2f26eSSascha Wildner 3295db2f26eSSascha Wildner /* 3305db2f26eSSascha Wildner * Disable any entry to the idle function. There is a small race where 3315db2f26eSSascha Wildner * an idle thread have passed this check but not gone to sleep. This 3325db2f26eSSascha Wildner * is ok since device_shutdown() does not free the softc, otherwise 3335db2f26eSSascha Wildner * we'd have to be sure all threads were evicted before returning. 3345db2f26eSSascha Wildner */ 3355db2f26eSSascha Wildner cpu_disable_idle = TRUE; 3365db2f26eSSascha Wildner 3375db2f26eSSascha Wildner return_VALUE (0); 3385db2f26eSSascha Wildner } 3395db2f26eSSascha Wildner 3405db2f26eSSascha Wildner static void 3414eee58faSSepherosa Ziehau acpi_cpu_cx_probe(struct acpi_cst_softc *sc) 3425db2f26eSSascha Wildner { 3435db2f26eSSascha Wildner ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 3445db2f26eSSascha Wildner 3455db2f26eSSascha Wildner /* Use initial sleep value of 1 sec. to start with lowest idle state. */ 3464eee58faSSepherosa Ziehau sc->cst_prev_sleep = 1000000; 3474eee58faSSepherosa Ziehau sc->cst_cx_lowest = 0; 3484eee58faSSepherosa Ziehau sc->cst_cx_lowest_req = 0; 3495db2f26eSSascha Wildner 3505db2f26eSSascha Wildner /* 3515db2f26eSSascha Wildner * Check for the ACPI 2.0 _CST sleep states object. If we can't find 3525db2f26eSSascha Wildner * any, we'll revert to generic FADT/P_BLK Cx control method which will 3535db2f26eSSascha Wildner * be handled by acpi_cpu_startup. We need to defer to after having 3545db2f26eSSascha Wildner * probed all the cpus in the system before probing for generic Cx 3555db2f26eSSascha Wildner * states as we may already have found cpus with valid _CST packages 3565db2f26eSSascha Wildner */ 3575db2f26eSSascha Wildner if (!cpu_cx_generic && acpi_cpu_cx_cst(sc) != 0) { 3585db2f26eSSascha Wildner /* 3595db2f26eSSascha Wildner * We were unable to find a _CST package for this cpu or there 3605db2f26eSSascha Wildner * was an error parsing it. Switch back to generic mode. 3615db2f26eSSascha Wildner */ 3625db2f26eSSascha Wildner cpu_cx_generic = TRUE; 3635db2f26eSSascha Wildner if (bootverbose) 3644eee58faSSepherosa Ziehau device_printf(sc->cst_dev, "switching to generic Cx mode\n"); 3655db2f26eSSascha Wildner } 3665db2f26eSSascha Wildner 3675db2f26eSSascha Wildner /* 3685db2f26eSSascha Wildner * TODO: _CSD Package should be checked here. 3695db2f26eSSascha Wildner */ 3705db2f26eSSascha Wildner } 3715db2f26eSSascha Wildner 3725db2f26eSSascha Wildner static void 3734eee58faSSepherosa Ziehau acpi_cpu_generic_cx_probe(struct acpi_cst_softc *sc) 3745db2f26eSSascha Wildner { 3755db2f26eSSascha Wildner ACPI_GENERIC_ADDRESS gas; 3765db2f26eSSascha Wildner struct acpi_cx *cx_ptr; 3775db2f26eSSascha Wildner 3784eee58faSSepherosa Ziehau sc->cst_cx_count = 0; 3794eee58faSSepherosa Ziehau cx_ptr = sc->cst_cx_states; 3805db2f26eSSascha Wildner 3815db2f26eSSascha Wildner /* Use initial sleep value of 1 sec. to start with lowest idle state. */ 3824eee58faSSepherosa Ziehau sc->cst_prev_sleep = 1000000; 3835db2f26eSSascha Wildner 3845db2f26eSSascha Wildner /* C1 has been required since just after ACPI 1.0 */ 3855db2f26eSSascha Wildner cx_ptr->type = ACPI_STATE_C1; 3865db2f26eSSascha Wildner cx_ptr->trans_lat = 0; 3875db2f26eSSascha Wildner cx_ptr++; 3884eee58faSSepherosa Ziehau sc->cst_cx_count++; 3895db2f26eSSascha Wildner 3905db2f26eSSascha Wildner /* 3915db2f26eSSascha Wildner * The spec says P_BLK must be 6 bytes long. However, some systems 3925db2f26eSSascha Wildner * use it to indicate a fractional set of features present so we 3935db2f26eSSascha Wildner * take 5 as C2. Some may also have a value of 7 to indicate 3945db2f26eSSascha Wildner * another C3 but most use _CST for this (as required) and having 3955db2f26eSSascha Wildner * "only" C1-C3 is not a hardship. 3965db2f26eSSascha Wildner */ 3974eee58faSSepherosa Ziehau if (sc->cst_p_blk_len < 5) 3985db2f26eSSascha Wildner return; 3995db2f26eSSascha Wildner 4005db2f26eSSascha Wildner /* Validate and allocate resources for C2 (P_LVL2). */ 4015db2f26eSSascha Wildner gas.SpaceId = ACPI_ADR_SPACE_SYSTEM_IO; 4025db2f26eSSascha Wildner gas.BitWidth = 8; 4035db2f26eSSascha Wildner if (AcpiGbl_FADT.C2Latency <= 100) { 4044eee58faSSepherosa Ziehau gas.Address = sc->cst_p_blk + 4; 4055db2f26eSSascha Wildner 4064eee58faSSepherosa Ziehau cx_ptr->rid = sc->cst_parent->cpux_next_rid; 4074eee58faSSepherosa Ziehau acpi_bus_alloc_gas(sc->cst_dev, &cx_ptr->type, &cx_ptr->rid, &gas, 4086942a279SSepherosa Ziehau &cx_ptr->p_lvlx, RF_SHAREABLE); 4095db2f26eSSascha Wildner if (cx_ptr->p_lvlx != NULL) { 4104eee58faSSepherosa Ziehau sc->cst_parent->cpux_next_rid++; 4115db2f26eSSascha Wildner cx_ptr->type = ACPI_STATE_C2; 4125db2f26eSSascha Wildner cx_ptr->trans_lat = AcpiGbl_FADT.C2Latency; 4135db2f26eSSascha Wildner cx_ptr++; 4144eee58faSSepherosa Ziehau sc->cst_cx_count++; 4154eee58faSSepherosa Ziehau sc->cst_non_c3 = 1; 4165db2f26eSSascha Wildner } 4175db2f26eSSascha Wildner } 4184eee58faSSepherosa Ziehau if (sc->cst_p_blk_len < 6) 4195db2f26eSSascha Wildner return; 4205db2f26eSSascha Wildner 4215db2f26eSSascha Wildner /* Validate and allocate resources for C3 (P_LVL3). */ 4225db2f26eSSascha Wildner if (AcpiGbl_FADT.C3Latency <= 1000 && !(cpu_quirks & CPU_QUIRK_NO_C3)) { 4234eee58faSSepherosa Ziehau gas.Address = sc->cst_p_blk + 5; 4245db2f26eSSascha Wildner 4254eee58faSSepherosa Ziehau cx_ptr->rid = sc->cst_parent->cpux_next_rid; 4264eee58faSSepherosa Ziehau acpi_bus_alloc_gas(sc->cst_dev, &cx_ptr->type, &cx_ptr->rid, &gas, 4275db2f26eSSascha Wildner &cx_ptr->p_lvlx, RF_SHAREABLE); 4285db2f26eSSascha Wildner if (cx_ptr->p_lvlx != NULL) { 4294eee58faSSepherosa Ziehau sc->cst_parent->cpux_next_rid++; 4305db2f26eSSascha Wildner cx_ptr->type = ACPI_STATE_C3; 4315db2f26eSSascha Wildner cx_ptr->trans_lat = AcpiGbl_FADT.C3Latency; 4325db2f26eSSascha Wildner cx_ptr++; 4334eee58faSSepherosa Ziehau sc->cst_cx_count++; 4345db2f26eSSascha Wildner } 4355db2f26eSSascha Wildner } 4365db2f26eSSascha Wildner } 4375db2f26eSSascha Wildner 4385db2f26eSSascha Wildner /* 4395db2f26eSSascha Wildner * Parse a _CST package and set up its Cx states. Since the _CST object 4405db2f26eSSascha Wildner * can change dynamically, our notify handler may call this function 4415db2f26eSSascha Wildner * to clean up and probe the new _CST package. 4425db2f26eSSascha Wildner */ 4435db2f26eSSascha Wildner static int 4444eee58faSSepherosa Ziehau acpi_cpu_cx_cst(struct acpi_cst_softc *sc) 4455db2f26eSSascha Wildner { 4465db2f26eSSascha Wildner struct acpi_cx *cx_ptr; 4475db2f26eSSascha Wildner ACPI_STATUS status; 4485db2f26eSSascha Wildner ACPI_BUFFER buf; 4495db2f26eSSascha Wildner ACPI_OBJECT *top; 4505db2f26eSSascha Wildner ACPI_OBJECT *pkg; 4515db2f26eSSascha Wildner uint32_t count; 4525db2f26eSSascha Wildner int i; 4535db2f26eSSascha Wildner 4545db2f26eSSascha Wildner ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 4555db2f26eSSascha Wildner 4565db2f26eSSascha Wildner buf.Pointer = NULL; 4575db2f26eSSascha Wildner buf.Length = ACPI_ALLOCATE_BUFFER; 4584eee58faSSepherosa Ziehau status = AcpiEvaluateObject(sc->cst_handle, "_CST", NULL, &buf); 4595db2f26eSSascha Wildner if (ACPI_FAILURE(status)) 4605db2f26eSSascha Wildner return (ENXIO); 4615db2f26eSSascha Wildner 4625db2f26eSSascha Wildner /* _CST is a package with a count and at least one Cx package. */ 4635db2f26eSSascha Wildner top = (ACPI_OBJECT *)buf.Pointer; 4645db2f26eSSascha Wildner if (!ACPI_PKG_VALID(top, 2) || acpi_PkgInt32(top, 0, &count) != 0) { 4654eee58faSSepherosa Ziehau device_printf(sc->cst_dev, "invalid _CST package\n"); 4665db2f26eSSascha Wildner AcpiOsFree(buf.Pointer); 4675db2f26eSSascha Wildner return (ENXIO); 4685db2f26eSSascha Wildner } 4695db2f26eSSascha Wildner if (count != top->Package.Count - 1) { 4704eee58faSSepherosa Ziehau device_printf(sc->cst_dev, "invalid _CST state count (%d != %d)\n", 4715db2f26eSSascha Wildner count, top->Package.Count - 1); 4725db2f26eSSascha Wildner count = top->Package.Count - 1; 4735db2f26eSSascha Wildner } 4745db2f26eSSascha Wildner if (count > MAX_CX_STATES) { 4754eee58faSSepherosa Ziehau device_printf(sc->cst_dev, "_CST has too many states (%d)\n", count); 4765db2f26eSSascha Wildner count = MAX_CX_STATES; 4775db2f26eSSascha Wildner } 4785db2f26eSSascha Wildner 47944806d43SSepherosa Ziehau sc->cst_flags |= ACPI_CST_FLAG_PROBING; 48044806d43SSepherosa Ziehau cpu_sfence(); 48144806d43SSepherosa Ziehau 4825db2f26eSSascha Wildner /* Set up all valid states. */ 4834eee58faSSepherosa Ziehau sc->cst_cx_count = 0; 4844eee58faSSepherosa Ziehau cx_ptr = sc->cst_cx_states; 4855db2f26eSSascha Wildner for (i = 0; i < count; i++) { 4865db2f26eSSascha Wildner pkg = &top->Package.Elements[i + 1]; 4875db2f26eSSascha Wildner if (!ACPI_PKG_VALID(pkg, 4) || 4885db2f26eSSascha Wildner acpi_PkgInt32(pkg, 1, &cx_ptr->type) != 0 || 4895db2f26eSSascha Wildner acpi_PkgInt32(pkg, 2, &cx_ptr->trans_lat) != 0 || 4905db2f26eSSascha Wildner acpi_PkgInt32(pkg, 3, &cx_ptr->power) != 0) { 4915db2f26eSSascha Wildner 4924eee58faSSepherosa Ziehau device_printf(sc->cst_dev, "skipping invalid Cx state package\n"); 4935db2f26eSSascha Wildner continue; 4945db2f26eSSascha Wildner } 4955db2f26eSSascha Wildner 4965db2f26eSSascha Wildner /* Validate the state to see if we should use it. */ 4975db2f26eSSascha Wildner switch (cx_ptr->type) { 4985db2f26eSSascha Wildner case ACPI_STATE_C1: 4994eee58faSSepherosa Ziehau sc->cst_non_c3 = i; 5005db2f26eSSascha Wildner cx_ptr++; 5014eee58faSSepherosa Ziehau sc->cst_cx_count++; 5025db2f26eSSascha Wildner continue; 5035db2f26eSSascha Wildner case ACPI_STATE_C2: 5044eee58faSSepherosa Ziehau sc->cst_non_c3 = i; 5055db2f26eSSascha Wildner break; 5065db2f26eSSascha Wildner case ACPI_STATE_C3: 5075db2f26eSSascha Wildner default: 5085db2f26eSSascha Wildner if ((cpu_quirks & CPU_QUIRK_NO_C3) != 0) { 5095db2f26eSSascha Wildner 5105db2f26eSSascha Wildner ACPI_DEBUG_PRINT((ACPI_DB_INFO, 5115db2f26eSSascha Wildner "acpi_cpu%d: C3[%d] not available.\n", 5124eee58faSSepherosa Ziehau device_get_unit(sc->cst_dev), i)); 5135db2f26eSSascha Wildner continue; 5145db2f26eSSascha Wildner } 5155db2f26eSSascha Wildner break; 5165db2f26eSSascha Wildner } 5175db2f26eSSascha Wildner 5185db2f26eSSascha Wildner #ifdef notyet 5195db2f26eSSascha Wildner /* Free up any previous register. */ 5205db2f26eSSascha Wildner if (cx_ptr->p_lvlx != NULL) { 5214eee58faSSepherosa Ziehau bus_release_resource(sc->cst_dev, 0, 0, cx_ptr->p_lvlx); 5225db2f26eSSascha Wildner cx_ptr->p_lvlx = NULL; 5235db2f26eSSascha Wildner } 5245db2f26eSSascha Wildner #endif 5255db2f26eSSascha Wildner 5265db2f26eSSascha Wildner /* Allocate the control register for C2 or C3. */ 5274eee58faSSepherosa Ziehau cx_ptr->rid = sc->cst_parent->cpux_next_rid; 5284eee58faSSepherosa Ziehau acpi_PkgGas(sc->cst_dev, pkg, 0, &cx_ptr->res_type, &cx_ptr->rid, 5296942a279SSepherosa Ziehau &cx_ptr->p_lvlx, RF_SHAREABLE); 5305db2f26eSSascha Wildner if (cx_ptr->p_lvlx) { 5314eee58faSSepherosa Ziehau sc->cst_parent->cpux_next_rid++; 5325db2f26eSSascha Wildner ACPI_DEBUG_PRINT((ACPI_DB_INFO, 5335db2f26eSSascha Wildner "acpi_cpu%d: Got C%d - %d latency\n", 5344eee58faSSepherosa Ziehau device_get_unit(sc->cst_dev), cx_ptr->type, 5355db2f26eSSascha Wildner cx_ptr->trans_lat)); 5365db2f26eSSascha Wildner cx_ptr++; 5374eee58faSSepherosa Ziehau sc->cst_cx_count++; 5385db2f26eSSascha Wildner } 5395db2f26eSSascha Wildner } 5405db2f26eSSascha Wildner AcpiOsFree(buf.Pointer); 5415db2f26eSSascha Wildner 5421d730338SSepherosa Ziehau /* 5431d730338SSepherosa Ziehau * Fix up the lowest Cx being used 5441d730338SSepherosa Ziehau */ 5454eee58faSSepherosa Ziehau if (sc->cst_cx_lowest_req < sc->cst_cx_count) 5464eee58faSSepherosa Ziehau sc->cst_cx_lowest = sc->cst_cx_lowest_req; 5474eee58faSSepherosa Ziehau if (sc->cst_cx_lowest > sc->cst_cx_count - 1) 5484eee58faSSepherosa Ziehau sc->cst_cx_lowest = sc->cst_cx_count - 1; 5491d730338SSepherosa Ziehau 550febc8c49SSepherosa Ziehau /* 551febc8c49SSepherosa Ziehau * Cache the lowest non-C3 state. 5524eee58faSSepherosa Ziehau * NOTE: must after cst_cx_lowest is set. 553febc8c49SSepherosa Ziehau */ 554febc8c49SSepherosa Ziehau acpi_cpu_cx_non_c3(sc); 555febc8c49SSepherosa Ziehau 55644806d43SSepherosa Ziehau cpu_sfence(); 55744806d43SSepherosa Ziehau sc->cst_flags &= ~ACPI_CST_FLAG_PROBING; 55844806d43SSepherosa Ziehau 5595db2f26eSSascha Wildner return (0); 5605db2f26eSSascha Wildner } 5615db2f26eSSascha Wildner 56244806d43SSepherosa Ziehau static void 56344806d43SSepherosa Ziehau acpi_cst_probe_handler(netmsg_t msg) 56444806d43SSepherosa Ziehau { 56544806d43SSepherosa Ziehau struct netmsg_acpi_cst *rmsg = (struct netmsg_acpi_cst *)msg; 56644806d43SSepherosa Ziehau int error; 56744806d43SSepherosa Ziehau 56844806d43SSepherosa Ziehau error = acpi_cpu_cx_cst(rmsg->sc); 56944806d43SSepherosa Ziehau lwkt_replymsg(&rmsg->base.lmsg, error); 57044806d43SSepherosa Ziehau } 57144806d43SSepherosa Ziehau 57244806d43SSepherosa Ziehau static int 5734eee58faSSepherosa Ziehau acpi_cpu_cx_cst_dispatch(struct acpi_cst_softc *sc) 57444806d43SSepherosa Ziehau { 57544806d43SSepherosa Ziehau struct netmsg_acpi_cst msg; 57644806d43SSepherosa Ziehau 57744806d43SSepherosa Ziehau netmsg_init(&msg.base, NULL, &curthread->td_msgport, MSGF_PRIORITY, 57844806d43SSepherosa Ziehau acpi_cst_probe_handler); 57944806d43SSepherosa Ziehau msg.sc = sc; 58044806d43SSepherosa Ziehau 5814eee58faSSepherosa Ziehau return lwkt_domsg(netisr_cpuport(sc->cst_cpuid), &msg.base.lmsg, 0); 58244806d43SSepherosa Ziehau } 58344806d43SSepherosa Ziehau 5845db2f26eSSascha Wildner /* 5855db2f26eSSascha Wildner * Call this *after* all CPUs have been attached. 5865db2f26eSSascha Wildner */ 5875db2f26eSSascha Wildner static void 5885db2f26eSSascha Wildner acpi_cpu_startup(void *arg) 5895db2f26eSSascha Wildner { 5904eee58faSSepherosa Ziehau struct acpi_cst_softc *sc; 5915db2f26eSSascha Wildner int i; 5925db2f26eSSascha Wildner 5935db2f26eSSascha Wildner /* Get set of CPU devices */ 594*41e658a2SSepherosa Ziehau devclass_get_devices(acpi_cst_devclass, &cpu_devices, &cpu_ndevices); 5955db2f26eSSascha Wildner 5965db2f26eSSascha Wildner /* 5975db2f26eSSascha Wildner * Setup any quirks that might necessary now that we have probed 5985db2f26eSSascha Wildner * all the CPUs 5995db2f26eSSascha Wildner */ 6005db2f26eSSascha Wildner acpi_cpu_quirks(); 6015db2f26eSSascha Wildner 6025db2f26eSSascha Wildner if (cpu_cx_generic) { 6035db2f26eSSascha Wildner /* 6045db2f26eSSascha Wildner * We are using generic Cx mode, probe for available Cx states 6055db2f26eSSascha Wildner * for all processors. 6065db2f26eSSascha Wildner */ 6075db2f26eSSascha Wildner for (i = 0; i < cpu_ndevices; i++) { 6085db2f26eSSascha Wildner sc = device_get_softc(cpu_devices[i]); 6095db2f26eSSascha Wildner acpi_cpu_generic_cx_probe(sc); 6105db2f26eSSascha Wildner } 6115db2f26eSSascha Wildner } else { 6125db2f26eSSascha Wildner /* 6135db2f26eSSascha Wildner * We are using _CST mode, remove C3 state if necessary. 6144cf48621SSepherosa Ziehau * 6155db2f26eSSascha Wildner * As we now know for sure that we will be using _CST mode 6165db2f26eSSascha Wildner * install our notify handler. 6175db2f26eSSascha Wildner */ 6185db2f26eSSascha Wildner for (i = 0; i < cpu_ndevices; i++) { 6195db2f26eSSascha Wildner sc = device_get_softc(cpu_devices[i]); 620ff830b69SSepherosa Ziehau if (cpu_quirks & CPU_QUIRK_NO_C3) 6214eee58faSSepherosa Ziehau sc->cst_cx_count = sc->cst_non_c3 + 1; 6224eee58faSSepherosa Ziehau sc->cst_parent->cpux_cst_notify = acpi_cpu_cst_notify; 6235db2f26eSSascha Wildner } 6245db2f26eSSascha Wildner } 6254cf48621SSepherosa Ziehau acpi_cpu_global_cx_count(); 6265db2f26eSSascha Wildner 6275db2f26eSSascha Wildner /* Perform Cx final initialization. */ 6285db2f26eSSascha Wildner for (i = 0; i < cpu_ndevices; i++) { 6295db2f26eSSascha Wildner sc = device_get_softc(cpu_devices[i]); 6305db2f26eSSascha Wildner acpi_cpu_startup_cx(sc); 6315db2f26eSSascha Wildner 6324eee58faSSepherosa Ziehau if (sc->cst_parent->glob_sysctl_tree != NULL) { 6334eee58faSSepherosa Ziehau struct acpi_cpux_softc *cpux = sc->cst_parent; 6345db2f26eSSascha Wildner 6355db2f26eSSascha Wildner /* Add a sysctl handler to handle global Cx lowest setting */ 6365db2f26eSSascha Wildner SYSCTL_ADD_PROC(&cpux->glob_sysctl_ctx, 6375db2f26eSSascha Wildner SYSCTL_CHILDREN(cpux->glob_sysctl_tree), 6385db2f26eSSascha Wildner OID_AUTO, "cx_lowest", 6395db2f26eSSascha Wildner CTLTYPE_STRING | CTLFLAG_RW, NULL, 0, 6405db2f26eSSascha Wildner acpi_cpu_global_cx_lowest_sysctl, "A", 6411d730338SSepherosa Ziehau "Requested global lowest Cx sleep state"); 6421d730338SSepherosa Ziehau SYSCTL_ADD_PROC(&cpux->glob_sysctl_ctx, 6431d730338SSepherosa Ziehau SYSCTL_CHILDREN(cpux->glob_sysctl_tree), 6441d730338SSepherosa Ziehau OID_AUTO, "cx_lowest_use", 6451d730338SSepherosa Ziehau CTLTYPE_STRING | CTLFLAG_RD, NULL, 0, 6461d730338SSepherosa Ziehau acpi_cpu_global_cx_lowest_use_sysctl, "A", 6475db2f26eSSascha Wildner "Global lowest Cx sleep state to use"); 6485db2f26eSSascha Wildner } 6495db2f26eSSascha Wildner } 6505db2f26eSSascha Wildner 6515db2f26eSSascha Wildner /* Take over idling from cpu_idle_default(). */ 6525db2f26eSSascha Wildner cpu_cx_lowest = 0; 6531d730338SSepherosa Ziehau cpu_cx_lowest_req = 0; 6545db2f26eSSascha Wildner cpu_disable_idle = FALSE; 6555db2f26eSSascha Wildner cpu_idle_hook = acpi_cpu_idle; 6565db2f26eSSascha Wildner } 6575db2f26eSSascha Wildner 6585db2f26eSSascha Wildner static void 6594eee58faSSepherosa Ziehau acpi_cpu_cx_list(struct acpi_cst_softc *sc) 6605db2f26eSSascha Wildner { 6615db2f26eSSascha Wildner struct sbuf sb; 6625db2f26eSSascha Wildner int i; 6635db2f26eSSascha Wildner 6645db2f26eSSascha Wildner /* 6655db2f26eSSascha Wildner * Set up the list of Cx states 6665db2f26eSSascha Wildner */ 6674eee58faSSepherosa Ziehau sbuf_new(&sb, sc->cst_cx_supported, sizeof(sc->cst_cx_supported), 6685db2f26eSSascha Wildner SBUF_FIXEDLEN); 6694eee58faSSepherosa Ziehau for (i = 0; i < sc->cst_cx_count; i++) 6704eee58faSSepherosa Ziehau sbuf_printf(&sb, "C%d/%d ", i + 1, sc->cst_cx_states[i].trans_lat); 6715db2f26eSSascha Wildner sbuf_trim(&sb); 6725db2f26eSSascha Wildner sbuf_finish(&sb); 6735db2f26eSSascha Wildner } 6745db2f26eSSascha Wildner 6755db2f26eSSascha Wildner static void 6764eee58faSSepherosa Ziehau acpi_cpu_startup_cx(struct acpi_cst_softc *sc) 6775db2f26eSSascha Wildner { 6784eee58faSSepherosa Ziehau struct acpi_cpux_softc *cpux = sc->cst_parent; 6795db2f26eSSascha Wildner 6805db2f26eSSascha Wildner acpi_cpu_cx_list(sc); 6815db2f26eSSascha Wildner 6825db2f26eSSascha Wildner SYSCTL_ADD_STRING(&cpux->pcpu_sysctl_ctx, 6835db2f26eSSascha Wildner SYSCTL_CHILDREN(cpux->pcpu_sysctl_tree), 6845db2f26eSSascha Wildner OID_AUTO, "cx_supported", CTLFLAG_RD, 6854eee58faSSepherosa Ziehau sc->cst_cx_supported, 0, 6865db2f26eSSascha Wildner "Cx/microsecond values for supported Cx states"); 6875db2f26eSSascha Wildner SYSCTL_ADD_PROC(&cpux->pcpu_sysctl_ctx, 6885db2f26eSSascha Wildner SYSCTL_CHILDREN(cpux->pcpu_sysctl_tree), 6895db2f26eSSascha Wildner OID_AUTO, "cx_lowest", CTLTYPE_STRING | CTLFLAG_RW, 6905db2f26eSSascha Wildner (void *)sc, 0, acpi_cpu_cx_lowest_sysctl, "A", 6911d730338SSepherosa Ziehau "requested lowest Cx sleep state"); 6921d730338SSepherosa Ziehau SYSCTL_ADD_PROC(&cpux->pcpu_sysctl_ctx, 6931d730338SSepherosa Ziehau SYSCTL_CHILDREN(cpux->pcpu_sysctl_tree), 6941d730338SSepherosa Ziehau OID_AUTO, "cx_lowest_use", CTLTYPE_STRING | CTLFLAG_RD, 6951d730338SSepherosa Ziehau (void *)sc, 0, acpi_cpu_cx_lowest_use_sysctl, "A", 6965db2f26eSSascha Wildner "lowest Cx sleep state to use"); 6975db2f26eSSascha Wildner SYSCTL_ADD_PROC(&cpux->pcpu_sysctl_ctx, 6985db2f26eSSascha Wildner SYSCTL_CHILDREN(cpux->pcpu_sysctl_tree), 6995db2f26eSSascha Wildner OID_AUTO, "cx_usage", CTLTYPE_STRING | CTLFLAG_RD, 7005db2f26eSSascha Wildner (void *)sc, 0, acpi_cpu_usage_sysctl, "A", 7015db2f26eSSascha Wildner "percent usage for each Cx state"); 7025db2f26eSSascha Wildner 7035db2f26eSSascha Wildner #ifdef notyet 7045db2f26eSSascha Wildner /* Signal platform that we can handle _CST notification. */ 7055db2f26eSSascha Wildner if (!cpu_cx_generic && cpu_cst_cnt != 0) { 7065db2f26eSSascha Wildner ACPI_LOCK(acpi); 7075db2f26eSSascha Wildner AcpiOsWritePort(cpu_smi_cmd, cpu_cst_cnt, 8); 7085db2f26eSSascha Wildner ACPI_UNLOCK(acpi); 7095db2f26eSSascha Wildner } 7105db2f26eSSascha Wildner #endif 7115db2f26eSSascha Wildner } 7125db2f26eSSascha Wildner 7135db2f26eSSascha Wildner /* 7145db2f26eSSascha Wildner * Idle the CPU in the lowest state possible. This function is called with 7155db2f26eSSascha Wildner * interrupts disabled. Note that once it re-enables interrupts, a task 7165db2f26eSSascha Wildner * switch can occur so do not access shared data (i.e. the softc) after 7175db2f26eSSascha Wildner * interrupts are re-enabled. 7185db2f26eSSascha Wildner */ 7195db2f26eSSascha Wildner static void 7205db2f26eSSascha Wildner acpi_cpu_idle(void) 7215db2f26eSSascha Wildner { 7224eee58faSSepherosa Ziehau struct acpi_cst_softc *sc; 7235db2f26eSSascha Wildner struct acpi_cx *cx_next; 7245db2f26eSSascha Wildner uint64_t start_time, end_time; 7255db2f26eSSascha Wildner int bm_active, cx_next_idx, i; 7265db2f26eSSascha Wildner 7275db2f26eSSascha Wildner /* If disabled, return immediately. */ 7285db2f26eSSascha Wildner if (cpu_disable_idle) { 7295db2f26eSSascha Wildner ACPI_ENABLE_IRQS(); 7305db2f26eSSascha Wildner return; 7315db2f26eSSascha Wildner } 7325db2f26eSSascha Wildner 7335db2f26eSSascha Wildner /* 7345db2f26eSSascha Wildner * Look up our CPU id to get our softc. If it's NULL, we'll use C1 7355db2f26eSSascha Wildner * since there is no ACPI processor object for this CPU. This occurs 7365db2f26eSSascha Wildner * for logical CPUs in the HTT case. 7375db2f26eSSascha Wildner */ 7385db2f26eSSascha Wildner sc = cpu_softc[mdcpu->mi.gd_cpuid]; 7395db2f26eSSascha Wildner if (sc == NULL) { 7405db2f26eSSascha Wildner acpi_cpu_c1(); 7415db2f26eSSascha Wildner return; 7425db2f26eSSascha Wildner } 7435db2f26eSSascha Wildner 74444806d43SSepherosa Ziehau /* Still probing; use C1 */ 74544806d43SSepherosa Ziehau if (sc->cst_flags & ACPI_CST_FLAG_PROBING) { 74644806d43SSepherosa Ziehau acpi_cpu_c1(); 74744806d43SSepherosa Ziehau return; 74844806d43SSepherosa Ziehau } 74944806d43SSepherosa Ziehau 7505db2f26eSSascha Wildner /* Find the lowest state that has small enough latency. */ 7515db2f26eSSascha Wildner cx_next_idx = 0; 7524eee58faSSepherosa Ziehau for (i = sc->cst_cx_lowest; i >= 0; i--) { 7534eee58faSSepherosa Ziehau if (sc->cst_cx_states[i].trans_lat * 3 <= sc->cst_prev_sleep) { 7545db2f26eSSascha Wildner cx_next_idx = i; 7555db2f26eSSascha Wildner break; 7565db2f26eSSascha Wildner } 7575db2f26eSSascha Wildner } 7585db2f26eSSascha Wildner 7595db2f26eSSascha Wildner /* 7605db2f26eSSascha Wildner * Check for bus master activity. If there was activity, clear 7615db2f26eSSascha Wildner * the bit and use the lowest non-C3 state. Note that the USB 7625db2f26eSSascha Wildner * driver polling for new devices keeps this bit set all the 7635db2f26eSSascha Wildner * time if USB is loaded. 7645db2f26eSSascha Wildner */ 7655db2f26eSSascha Wildner if ((cpu_quirks & CPU_QUIRK_NO_BM_CTRL) == 0) { 7665db2f26eSSascha Wildner AcpiReadBitRegister(ACPI_BITREG_BUS_MASTER_STATUS, &bm_active); 7675db2f26eSSascha Wildner if (bm_active != 0) { 7685db2f26eSSascha Wildner AcpiWriteBitRegister(ACPI_BITREG_BUS_MASTER_STATUS, 1); 7694eee58faSSepherosa Ziehau cx_next_idx = min(cx_next_idx, sc->cst_non_c3); 7705db2f26eSSascha Wildner } 7715db2f26eSSascha Wildner } 7725db2f26eSSascha Wildner 7735db2f26eSSascha Wildner /* Select the next state and update statistics. */ 7744eee58faSSepherosa Ziehau cx_next = &sc->cst_cx_states[cx_next_idx]; 7754eee58faSSepherosa Ziehau sc->cst_cx_stats[cx_next_idx]++; 7765db2f26eSSascha Wildner KASSERT(cx_next->type != ACPI_STATE_C0, ("acpi_cpu_idle: C0 sleep")); 7775db2f26eSSascha Wildner 7785db2f26eSSascha Wildner /* 7795db2f26eSSascha Wildner * Execute HLT (or equivalent) and wait for an interrupt. We can't 7805db2f26eSSascha Wildner * calculate the time spent in C1 since the place we wake up is an 7815db2f26eSSascha Wildner * ISR. Assume we slept half of quantum and return. 7825db2f26eSSascha Wildner */ 7835db2f26eSSascha Wildner if (cx_next->type == ACPI_STATE_C1) { 7844eee58faSSepherosa Ziehau sc->cst_prev_sleep = (sc->cst_prev_sleep * 3 + 500000 / hz) / 4; 7855db2f26eSSascha Wildner acpi_cpu_c1(); 7865db2f26eSSascha Wildner return; 7875db2f26eSSascha Wildner } 7885db2f26eSSascha Wildner 7895db2f26eSSascha Wildner /* 790b42fff25SSepherosa Ziehau * For C3(+), disable bus master arbitration and enable bus master wake 7915db2f26eSSascha Wildner * if BM control is available, otherwise flush the CPU cache. 7925db2f26eSSascha Wildner */ 793b42fff25SSepherosa Ziehau if (cx_next->type >= ACPI_STATE_C3) { 7945db2f26eSSascha Wildner if ((cpu_quirks & CPU_QUIRK_NO_BM_CTRL) == 0) { 7955db2f26eSSascha Wildner AcpiWriteBitRegister(ACPI_BITREG_ARB_DISABLE, 1); 7965db2f26eSSascha Wildner AcpiWriteBitRegister(ACPI_BITREG_BUS_MASTER_RLD, 1); 7975db2f26eSSascha Wildner } else 7985db2f26eSSascha Wildner ACPI_FLUSH_CPU_CACHE(); 7995db2f26eSSascha Wildner } 8005db2f26eSSascha Wildner 8015db2f26eSSascha Wildner /* 8025db2f26eSSascha Wildner * Read from P_LVLx to enter C2(+), checking time spent asleep. 8035db2f26eSSascha Wildner * Use the ACPI timer for measuring sleep time. Since we need to 8045db2f26eSSascha Wildner * get the time very close to the CPU start/stop clock logic, this 8055db2f26eSSascha Wildner * is the only reliable time source. 8065db2f26eSSascha Wildner */ 8075db2f26eSSascha Wildner AcpiRead(&start_time, &AcpiGbl_FADT.XPmTimerBlock); 8085db2f26eSSascha Wildner CPU_GET_REG(cx_next->p_lvlx, 1); 8095db2f26eSSascha Wildner 8105db2f26eSSascha Wildner /* 8115db2f26eSSascha Wildner * Read the end time twice. Since it may take an arbitrary time 8125db2f26eSSascha Wildner * to enter the idle state, the first read may be executed before 8135db2f26eSSascha Wildner * the processor has stopped. Doing it again provides enough 8145db2f26eSSascha Wildner * margin that we are certain to have a correct value. 8155db2f26eSSascha Wildner */ 8165db2f26eSSascha Wildner AcpiRead(&end_time, &AcpiGbl_FADT.XPmTimerBlock); 8175db2f26eSSascha Wildner AcpiRead(&end_time, &AcpiGbl_FADT.XPmTimerBlock); 8185db2f26eSSascha Wildner 8195db2f26eSSascha Wildner /* Enable bus master arbitration and disable bus master wakeup. */ 820b42fff25SSepherosa Ziehau if (cx_next->type >= ACPI_STATE_C3) { 8215db2f26eSSascha Wildner if ((cpu_quirks & CPU_QUIRK_NO_BM_CTRL) == 0) { 8225db2f26eSSascha Wildner AcpiWriteBitRegister(ACPI_BITREG_ARB_DISABLE, 0); 8235db2f26eSSascha Wildner AcpiWriteBitRegister(ACPI_BITREG_BUS_MASTER_RLD, 0); 8245db2f26eSSascha Wildner } 8255db2f26eSSascha Wildner } 8265db2f26eSSascha Wildner ACPI_ENABLE_IRQS(); 8275db2f26eSSascha Wildner 8285db2f26eSSascha Wildner /* Find the actual time asleep in microseconds. */ 8295db2f26eSSascha Wildner end_time = acpi_TimerDelta(end_time, start_time); 8304eee58faSSepherosa Ziehau sc->cst_prev_sleep = (sc->cst_prev_sleep * 3 + PM_USEC(end_time)) / 4; 8315db2f26eSSascha Wildner } 8325db2f26eSSascha Wildner 8335db2f26eSSascha Wildner /* 8345db2f26eSSascha Wildner * Re-evaluate the _CST object when we are notified that it changed. 8355db2f26eSSascha Wildner */ 8365db2f26eSSascha Wildner static void 8375db2f26eSSascha Wildner acpi_cpu_cst_notify(device_t dev) 8385db2f26eSSascha Wildner { 8394eee58faSSepherosa Ziehau struct acpi_cst_softc *sc = device_get_softc(dev); 8405db2f26eSSascha Wildner 841b45624acSSepherosa Ziehau KASSERT(curthread->td_type != TD_TYPE_NETISR, 842b45624acSSepherosa Ziehau ("notify in netisr%d", mycpuid)); 843b45624acSSepherosa Ziehau 844b45624acSSepherosa Ziehau lwkt_serialize_enter(&cpu_cx_slize); 845b45624acSSepherosa Ziehau 8465db2f26eSSascha Wildner /* Update the list of Cx states. */ 84744806d43SSepherosa Ziehau acpi_cpu_cx_cst_dispatch(sc); 8485db2f26eSSascha Wildner acpi_cpu_cx_list(sc); 8495db2f26eSSascha Wildner 8505db2f26eSSascha Wildner /* Update the new lowest useable Cx state for all CPUs. */ 8514cf48621SSepherosa Ziehau acpi_cpu_global_cx_count(); 8521d730338SSepherosa Ziehau 8531d730338SSepherosa Ziehau /* 8541d730338SSepherosa Ziehau * Fix up the lowest Cx being used 8551d730338SSepherosa Ziehau */ 8561d730338SSepherosa Ziehau if (cpu_cx_lowest_req < cpu_cx_count) 8571d730338SSepherosa Ziehau cpu_cx_lowest = cpu_cx_lowest_req; 8581d730338SSepherosa Ziehau if (cpu_cx_lowest > cpu_cx_count - 1) 8591d730338SSepherosa Ziehau cpu_cx_lowest = cpu_cx_count - 1; 8601d730338SSepherosa Ziehau 861b45624acSSepherosa Ziehau lwkt_serialize_exit(&cpu_cx_slize); 8625db2f26eSSascha Wildner } 8635db2f26eSSascha Wildner 8645db2f26eSSascha Wildner static int 8655db2f26eSSascha Wildner acpi_cpu_quirks(void) 8665db2f26eSSascha Wildner { 8675db2f26eSSascha Wildner device_t acpi_dev; 8685db2f26eSSascha Wildner uint32_t val; 8695db2f26eSSascha Wildner 8705db2f26eSSascha Wildner ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 8715db2f26eSSascha Wildner 8725db2f26eSSascha Wildner /* 8735db2f26eSSascha Wildner * Bus mastering arbitration control is needed to keep caches coherent 8745db2f26eSSascha Wildner * while sleeping in C3. If it's not present but a working flush cache 8755db2f26eSSascha Wildner * instruction is present, flush the caches before entering C3 instead. 8765db2f26eSSascha Wildner * Otherwise, just disable C3 completely. 8775db2f26eSSascha Wildner */ 8785db2f26eSSascha Wildner if (AcpiGbl_FADT.Pm2ControlBlock == 0 || 8795db2f26eSSascha Wildner AcpiGbl_FADT.Pm2ControlLength == 0) { 8805db2f26eSSascha Wildner if ((AcpiGbl_FADT.Flags & ACPI_FADT_WBINVD) && 8815db2f26eSSascha Wildner (AcpiGbl_FADT.Flags & ACPI_FADT_WBINVD_FLUSH) == 0) { 8825db2f26eSSascha Wildner cpu_quirks |= CPU_QUIRK_NO_BM_CTRL; 8835db2f26eSSascha Wildner ACPI_DEBUG_PRINT((ACPI_DB_INFO, 8845db2f26eSSascha Wildner "acpi_cpu: no BM control, using flush cache method\n")); 8855db2f26eSSascha Wildner } else { 8865db2f26eSSascha Wildner cpu_quirks |= CPU_QUIRK_NO_C3; 8875db2f26eSSascha Wildner ACPI_DEBUG_PRINT((ACPI_DB_INFO, 8885db2f26eSSascha Wildner "acpi_cpu: no BM control, C3 not available\n")); 8895db2f26eSSascha Wildner } 8905db2f26eSSascha Wildner } 8915db2f26eSSascha Wildner 8925db2f26eSSascha Wildner /* 8935db2f26eSSascha Wildner * If we are using generic Cx mode, C3 on multiple CPUs requires using 8945db2f26eSSascha Wildner * the expensive flush cache instruction. 8955db2f26eSSascha Wildner */ 8965db2f26eSSascha Wildner if (cpu_cx_generic && ncpus > 1) { 8975db2f26eSSascha Wildner cpu_quirks |= CPU_QUIRK_NO_BM_CTRL; 8985db2f26eSSascha Wildner ACPI_DEBUG_PRINT((ACPI_DB_INFO, 8995db2f26eSSascha Wildner "acpi_cpu: SMP, using flush cache mode for C3\n")); 9005db2f26eSSascha Wildner } 9015db2f26eSSascha Wildner 9025db2f26eSSascha Wildner /* Look for various quirks of the PIIX4 part. */ 9035db2f26eSSascha Wildner acpi_dev = pci_find_device(PCI_VENDOR_INTEL, PCI_DEVICE_82371AB_3); 9045db2f26eSSascha Wildner if (acpi_dev != NULL) { 9055db2f26eSSascha Wildner switch (pci_get_revid(acpi_dev)) { 9065db2f26eSSascha Wildner /* 9075db2f26eSSascha Wildner * Disable C3 support for all PIIX4 chipsets. Some of these parts 9085db2f26eSSascha Wildner * do not report the BMIDE status to the BM status register and 9095db2f26eSSascha Wildner * others have a livelock bug if Type-F DMA is enabled. Linux 9105db2f26eSSascha Wildner * works around the BMIDE bug by reading the BM status directly 9115db2f26eSSascha Wildner * but we take the simpler approach of disabling C3 for these 9125db2f26eSSascha Wildner * parts. 9135db2f26eSSascha Wildner * 9145db2f26eSSascha Wildner * See erratum #18 ("C3 Power State/BMIDE and Type-F DMA 9155db2f26eSSascha Wildner * Livelock") from the January 2002 PIIX4 specification update. 9165db2f26eSSascha Wildner * Applies to all PIIX4 models. 9175db2f26eSSascha Wildner * 9185db2f26eSSascha Wildner * Also, make sure that all interrupts cause a "Stop Break" 9195db2f26eSSascha Wildner * event to exit from C2 state. 9205db2f26eSSascha Wildner * Also, BRLD_EN_BM (ACPI_BITREG_BUS_MASTER_RLD in ACPI-speak) 9215db2f26eSSascha Wildner * should be set to zero, otherwise it causes C2 to short-sleep. 9225db2f26eSSascha Wildner * PIIX4 doesn't properly support C3 and bus master activity 9235db2f26eSSascha Wildner * need not break out of C2. 9245db2f26eSSascha Wildner */ 9255db2f26eSSascha Wildner case PCI_REVISION_A_STEP: 9265db2f26eSSascha Wildner case PCI_REVISION_B_STEP: 9275db2f26eSSascha Wildner case PCI_REVISION_4E: 9285db2f26eSSascha Wildner case PCI_REVISION_4M: 9295db2f26eSSascha Wildner cpu_quirks |= CPU_QUIRK_NO_C3; 9305db2f26eSSascha Wildner ACPI_DEBUG_PRINT((ACPI_DB_INFO, 9315db2f26eSSascha Wildner "acpi_cpu: working around PIIX4 bug, disabling C3\n")); 9325db2f26eSSascha Wildner 9335db2f26eSSascha Wildner val = pci_read_config(acpi_dev, PIIX4_DEVACTB_REG, 4); 9345db2f26eSSascha Wildner if ((val & PIIX4_STOP_BREAK_MASK) != PIIX4_STOP_BREAK_MASK) { 9355db2f26eSSascha Wildner ACPI_DEBUG_PRINT((ACPI_DB_INFO, 9365db2f26eSSascha Wildner "acpi_cpu: PIIX4: enabling IRQs to generate Stop Break\n")); 9375db2f26eSSascha Wildner val |= PIIX4_STOP_BREAK_MASK; 9385db2f26eSSascha Wildner pci_write_config(acpi_dev, PIIX4_DEVACTB_REG, val, 4); 9395db2f26eSSascha Wildner } 9405db2f26eSSascha Wildner AcpiReadBitRegister(ACPI_BITREG_BUS_MASTER_RLD, &val); 9415db2f26eSSascha Wildner if (val) { 9425db2f26eSSascha Wildner ACPI_DEBUG_PRINT((ACPI_DB_INFO, 9435db2f26eSSascha Wildner "acpi_cpu: PIIX4: reset BRLD_EN_BM\n")); 9445db2f26eSSascha Wildner AcpiWriteBitRegister(ACPI_BITREG_BUS_MASTER_RLD, 0); 9455db2f26eSSascha Wildner } 9465db2f26eSSascha Wildner break; 9475db2f26eSSascha Wildner default: 9485db2f26eSSascha Wildner break; 9495db2f26eSSascha Wildner } 9505db2f26eSSascha Wildner } 9515db2f26eSSascha Wildner 9525db2f26eSSascha Wildner return (0); 9535db2f26eSSascha Wildner } 9545db2f26eSSascha Wildner 9555db2f26eSSascha Wildner static int 9565db2f26eSSascha Wildner acpi_cpu_usage_sysctl(SYSCTL_HANDLER_ARGS) 9575db2f26eSSascha Wildner { 9584eee58faSSepherosa Ziehau struct acpi_cst_softc *sc; 9595db2f26eSSascha Wildner struct sbuf sb; 9605db2f26eSSascha Wildner char buf[128]; 9615db2f26eSSascha Wildner int i; 9625db2f26eSSascha Wildner uintmax_t fract, sum, whole; 9635db2f26eSSascha Wildner 9644eee58faSSepherosa Ziehau sc = (struct acpi_cst_softc *) arg1; 9655db2f26eSSascha Wildner sum = 0; 9664eee58faSSepherosa Ziehau for (i = 0; i < sc->cst_cx_count; i++) 9674eee58faSSepherosa Ziehau sum += sc->cst_cx_stats[i]; 9685db2f26eSSascha Wildner sbuf_new(&sb, buf, sizeof(buf), SBUF_FIXEDLEN); 9694eee58faSSepherosa Ziehau for (i = 0; i < sc->cst_cx_count; i++) { 9705db2f26eSSascha Wildner if (sum > 0) { 9714eee58faSSepherosa Ziehau whole = (uintmax_t)sc->cst_cx_stats[i] * 100; 9725db2f26eSSascha Wildner fract = (whole % sum) * 100; 9735db2f26eSSascha Wildner sbuf_printf(&sb, "%u.%02u%% ", (u_int)(whole / sum), 9745db2f26eSSascha Wildner (u_int)(fract / sum)); 9755db2f26eSSascha Wildner } else 9765db2f26eSSascha Wildner sbuf_printf(&sb, "0.00%% "); 9775db2f26eSSascha Wildner } 9784eee58faSSepherosa Ziehau sbuf_printf(&sb, "last %dus", sc->cst_prev_sleep); 9795db2f26eSSascha Wildner sbuf_trim(&sb); 9805db2f26eSSascha Wildner sbuf_finish(&sb); 9815db2f26eSSascha Wildner sysctl_handle_string(oidp, sbuf_data(&sb), sbuf_len(&sb), req); 9825db2f26eSSascha Wildner sbuf_delete(&sb); 9835db2f26eSSascha Wildner 9845db2f26eSSascha Wildner return (0); 9855db2f26eSSascha Wildner } 9865db2f26eSSascha Wildner 9875db2f26eSSascha Wildner static int 9884eee58faSSepherosa Ziehau acpi_cpu_set_cx_lowest_oncpu(struct acpi_cst_softc *sc, int val) 9895db2f26eSSascha Wildner { 990de6641b7SSepherosa Ziehau int old_lowest, error = 0, old_lowest_req; 9915db2f26eSSascha Wildner uint32_t old_type, type; 9925db2f26eSSascha Wildner 9934eee58faSSepherosa Ziehau KKASSERT(mycpuid == sc->cst_cpuid); 994c241507cSSepherosa Ziehau 995de6641b7SSepherosa Ziehau old_lowest_req = sc->cst_cx_lowest_req; 9964eee58faSSepherosa Ziehau sc->cst_cx_lowest_req = val; 997de6641b7SSepherosa Ziehau 9984eee58faSSepherosa Ziehau if (val > sc->cst_cx_count - 1) 9994eee58faSSepherosa Ziehau val = sc->cst_cx_count - 1; 10004eee58faSSepherosa Ziehau old_lowest = atomic_swap_int(&sc->cst_cx_lowest, val); 10015db2f26eSSascha Wildner 10024eee58faSSepherosa Ziehau old_type = sc->cst_cx_states[old_lowest].type; 10034eee58faSSepherosa Ziehau type = sc->cst_cx_states[val].type; 1004b42fff25SSepherosa Ziehau if (old_type >= ACPI_STATE_C3 && type < ACPI_STATE_C3) { 10055db2f26eSSascha Wildner KKASSERT(cpu_c3_ncpus > 0); 10065db2f26eSSascha Wildner if (atomic_fetchadd_int(&cpu_c3_ncpus, -1) == 1) { 10075db2f26eSSascha Wildner /* 10085db2f26eSSascha Wildner * All of the CPUs exit C3 state, use a better 10095db2f26eSSascha Wildner * one shot timer. 10105db2f26eSSascha Wildner */ 10115db2f26eSSascha Wildner error = cputimer_intr_select_caps(CPUTIMER_INTR_CAP_NONE); 10123b24650bSSepherosa Ziehau KKASSERT(!error || error == ERESTART); 10133b24650bSSepherosa Ziehau if (error == ERESTART) { 10143b24650bSSepherosa Ziehau if (bootverbose) 10153b24650bSSepherosa Ziehau kprintf("exit C3, restart intr cputimer\n"); 10165db2f26eSSascha Wildner cputimer_intr_restart(); 10175db2f26eSSascha Wildner } 10183b24650bSSepherosa Ziehau } 1019b42fff25SSepherosa Ziehau } else if (type >= ACPI_STATE_C3 && old_type < ACPI_STATE_C3) { 10205db2f26eSSascha Wildner if (atomic_fetchadd_int(&cpu_c3_ncpus, 1) == 0) { 10215db2f26eSSascha Wildner /* 1022b42fff25SSepherosa Ziehau * When the first CPU enters C3(+) state, switch 10235db2f26eSSascha Wildner * to an one shot timer, which could handle 1024b42fff25SSepherosa Ziehau * C3(+) state, i.e. the timer will not hang. 10255db2f26eSSascha Wildner */ 10265db2f26eSSascha Wildner error = cputimer_intr_select_caps(CPUTIMER_INTR_CAP_PS); 10273b24650bSSepherosa Ziehau if (error == ERESTART) { 10283b24650bSSepherosa Ziehau if (bootverbose) 10293b24650bSSepherosa Ziehau kprintf("enter C3, restart intr cputimer\n"); 10305db2f26eSSascha Wildner cputimer_intr_restart(); 10313b24650bSSepherosa Ziehau } else if (error) { 10325db2f26eSSascha Wildner kprintf("no suitable intr cputimer found\n"); 10335db2f26eSSascha Wildner 10345db2f26eSSascha Wildner /* Restore */ 1035de6641b7SSepherosa Ziehau sc->cst_cx_lowest_req = old_lowest_req; 10364eee58faSSepherosa Ziehau sc->cst_cx_lowest = old_lowest; 10375db2f26eSSascha Wildner atomic_fetchadd_int(&cpu_c3_ncpus, -1); 10385db2f26eSSascha Wildner } 10395db2f26eSSascha Wildner } 10405db2f26eSSascha Wildner } 10415db2f26eSSascha Wildner 10425db2f26eSSascha Wildner if (error) 10435db2f26eSSascha Wildner return error; 10445db2f26eSSascha Wildner 1045febc8c49SSepherosa Ziehau /* Cache the new lowest non-C3 state. */ 1046febc8c49SSepherosa Ziehau acpi_cpu_cx_non_c3(sc); 10475db2f26eSSascha Wildner 10485db2f26eSSascha Wildner /* Reset the statistics counters. */ 10494eee58faSSepherosa Ziehau bzero(sc->cst_cx_stats, sizeof(sc->cst_cx_stats)); 10505db2f26eSSascha Wildner return (0); 10515db2f26eSSascha Wildner } 10525db2f26eSSascha Wildner 1053c241507cSSepherosa Ziehau static void 1054c241507cSSepherosa Ziehau acpi_cst_set_lowest_handler(netmsg_t msg) 1055c241507cSSepherosa Ziehau { 1056c241507cSSepherosa Ziehau struct netmsg_acpi_cst *rmsg = (struct netmsg_acpi_cst *)msg; 1057c241507cSSepherosa Ziehau int error; 1058c241507cSSepherosa Ziehau 1059c241507cSSepherosa Ziehau error = acpi_cpu_set_cx_lowest_oncpu(rmsg->sc, rmsg->val); 1060c241507cSSepherosa Ziehau lwkt_replymsg(&rmsg->base.lmsg, error); 1061c241507cSSepherosa Ziehau } 1062c241507cSSepherosa Ziehau 1063c241507cSSepherosa Ziehau static int 10644eee58faSSepherosa Ziehau acpi_cpu_set_cx_lowest(struct acpi_cst_softc *sc, int val) 1065c241507cSSepherosa Ziehau { 1066c241507cSSepherosa Ziehau struct netmsg_acpi_cst msg; 1067c241507cSSepherosa Ziehau 1068c241507cSSepherosa Ziehau netmsg_init(&msg.base, NULL, &curthread->td_msgport, MSGF_PRIORITY, 1069c241507cSSepherosa Ziehau acpi_cst_set_lowest_handler); 1070c241507cSSepherosa Ziehau msg.sc = sc; 1071c241507cSSepherosa Ziehau msg.val = val; 1072c241507cSSepherosa Ziehau 10734eee58faSSepherosa Ziehau return lwkt_domsg(netisr_cpuport(sc->cst_cpuid), &msg.base.lmsg, 0); 1074c241507cSSepherosa Ziehau } 1075c241507cSSepherosa Ziehau 10765db2f26eSSascha Wildner static int 10775db2f26eSSascha Wildner acpi_cpu_cx_lowest_sysctl(SYSCTL_HANDLER_ARGS) 10785db2f26eSSascha Wildner { 10794eee58faSSepherosa Ziehau struct acpi_cst_softc *sc; 10805db2f26eSSascha Wildner char state[8]; 10815db2f26eSSascha Wildner int val, error; 10825db2f26eSSascha Wildner 10834eee58faSSepherosa Ziehau sc = (struct acpi_cst_softc *)arg1; 10844eee58faSSepherosa Ziehau ksnprintf(state, sizeof(state), "C%d", sc->cst_cx_lowest_req + 1); 10855db2f26eSSascha Wildner error = sysctl_handle_string(oidp, state, sizeof(state), req); 10865db2f26eSSascha Wildner if (error != 0 || req->newptr == NULL) 10875db2f26eSSascha Wildner return (error); 10885db2f26eSSascha Wildner if (strlen(state) < 2 || toupper(state[0]) != 'C') 10895db2f26eSSascha Wildner return (EINVAL); 10905db2f26eSSascha Wildner val = (int) strtol(state + 1, NULL, 10) - 1; 10911d730338SSepherosa Ziehau if (val < 0) 10925db2f26eSSascha Wildner return (EINVAL); 10935db2f26eSSascha Wildner 1094b45624acSSepherosa Ziehau lwkt_serialize_enter(&cpu_cx_slize); 10955db2f26eSSascha Wildner error = acpi_cpu_set_cx_lowest(sc, val); 1096b45624acSSepherosa Ziehau lwkt_serialize_exit(&cpu_cx_slize); 10975db2f26eSSascha Wildner 10985db2f26eSSascha Wildner return error; 10995db2f26eSSascha Wildner } 11005db2f26eSSascha Wildner 11015db2f26eSSascha Wildner static int 11021d730338SSepherosa Ziehau acpi_cpu_cx_lowest_use_sysctl(SYSCTL_HANDLER_ARGS) 11031d730338SSepherosa Ziehau { 11044eee58faSSepherosa Ziehau struct acpi_cst_softc *sc; 11051d730338SSepherosa Ziehau char state[8]; 11061d730338SSepherosa Ziehau 11074eee58faSSepherosa Ziehau sc = (struct acpi_cst_softc *)arg1; 11084eee58faSSepherosa Ziehau ksnprintf(state, sizeof(state), "C%d", sc->cst_cx_lowest + 1); 11091d730338SSepherosa Ziehau return sysctl_handle_string(oidp, state, sizeof(state), req); 11101d730338SSepherosa Ziehau } 11111d730338SSepherosa Ziehau 11121d730338SSepherosa Ziehau static int 11135db2f26eSSascha Wildner acpi_cpu_global_cx_lowest_sysctl(SYSCTL_HANDLER_ARGS) 11145db2f26eSSascha Wildner { 11154eee58faSSepherosa Ziehau struct acpi_cst_softc *sc; 11165db2f26eSSascha Wildner char state[8]; 11175db2f26eSSascha Wildner int val, error, i; 11185db2f26eSSascha Wildner 11191d730338SSepherosa Ziehau ksnprintf(state, sizeof(state), "C%d", cpu_cx_lowest_req + 1); 11205db2f26eSSascha Wildner error = sysctl_handle_string(oidp, state, sizeof(state), req); 11215db2f26eSSascha Wildner if (error != 0 || req->newptr == NULL) 11225db2f26eSSascha Wildner return (error); 11235db2f26eSSascha Wildner if (strlen(state) < 2 || toupper(state[0]) != 'C') 11245db2f26eSSascha Wildner return (EINVAL); 11255db2f26eSSascha Wildner val = (int) strtol(state + 1, NULL, 10) - 1; 11261d730338SSepherosa Ziehau if (val < 0) 11275db2f26eSSascha Wildner return (EINVAL); 11281d730338SSepherosa Ziehau 1129b45624acSSepherosa Ziehau lwkt_serialize_enter(&cpu_cx_slize); 1130b45624acSSepherosa Ziehau 11311d730338SSepherosa Ziehau cpu_cx_lowest_req = val; 11325db2f26eSSascha Wildner cpu_cx_lowest = val; 11331d730338SSepherosa Ziehau if (cpu_cx_lowest > cpu_cx_count - 1) 11341d730338SSepherosa Ziehau cpu_cx_lowest = cpu_cx_count - 1; 11355db2f26eSSascha Wildner 11365db2f26eSSascha Wildner /* Update the new lowest useable Cx state for all CPUs. */ 11375db2f26eSSascha Wildner for (i = 0; i < cpu_ndevices; i++) { 11385db2f26eSSascha Wildner sc = device_get_softc(cpu_devices[i]); 11395db2f26eSSascha Wildner error = acpi_cpu_set_cx_lowest(sc, val); 11405db2f26eSSascha Wildner if (error) { 11415db2f26eSSascha Wildner KKASSERT(i == 0); 11425db2f26eSSascha Wildner break; 11435db2f26eSSascha Wildner } 11445db2f26eSSascha Wildner } 1145b45624acSSepherosa Ziehau 1146b45624acSSepherosa Ziehau lwkt_serialize_exit(&cpu_cx_slize); 11475db2f26eSSascha Wildner 11485db2f26eSSascha Wildner return error; 11495db2f26eSSascha Wildner } 11505db2f26eSSascha Wildner 11511d730338SSepherosa Ziehau static int 11521d730338SSepherosa Ziehau acpi_cpu_global_cx_lowest_use_sysctl(SYSCTL_HANDLER_ARGS) 11531d730338SSepherosa Ziehau { 11541d730338SSepherosa Ziehau char state[8]; 11551d730338SSepherosa Ziehau 11561d730338SSepherosa Ziehau ksnprintf(state, sizeof(state), "C%d", cpu_cx_lowest + 1); 11571d730338SSepherosa Ziehau return sysctl_handle_string(oidp, state, sizeof(state), req); 11581d730338SSepherosa Ziehau } 11591d730338SSepherosa Ziehau 11605db2f26eSSascha Wildner /* 11615db2f26eSSascha Wildner * Put the CPU in C1 in a machine-dependant way. 11625db2f26eSSascha Wildner * XXX: shouldn't be here! 11635db2f26eSSascha Wildner */ 11645db2f26eSSascha Wildner static void 11655db2f26eSSascha Wildner acpi_cpu_c1(void) 11665db2f26eSSascha Wildner { 11675db2f26eSSascha Wildner #ifdef __ia64__ 11685db2f26eSSascha Wildner ia64_call_pal_static(PAL_HALT_LIGHT, 0, 0, 0); 11695db2f26eSSascha Wildner #else 11705db2f26eSSascha Wildner splz(); 11715db2f26eSSascha Wildner if ((mycpu->gd_reqflags & RQF_IDLECHECK_WK_MASK) == 0) 11725db2f26eSSascha Wildner __asm __volatile("sti; hlt"); 11735db2f26eSSascha Wildner else 11745db2f26eSSascha Wildner __asm __volatile("sti; pause"); 11755db2f26eSSascha Wildner #endif /* !__ia64__ */ 11765db2f26eSSascha Wildner } 1177febc8c49SSepherosa Ziehau 1178febc8c49SSepherosa Ziehau static void 11794eee58faSSepherosa Ziehau acpi_cpu_cx_non_c3(struct acpi_cst_softc *sc) 1180febc8c49SSepherosa Ziehau { 1181febc8c49SSepherosa Ziehau int i; 1182febc8c49SSepherosa Ziehau 11834eee58faSSepherosa Ziehau sc->cst_non_c3 = 0; 11844eee58faSSepherosa Ziehau for (i = sc->cst_cx_lowest; i >= 0; i--) { 11854eee58faSSepherosa Ziehau if (sc->cst_cx_states[i].type < ACPI_STATE_C3) { 11864eee58faSSepherosa Ziehau sc->cst_non_c3 = i; 1187febc8c49SSepherosa Ziehau break; 1188febc8c49SSepherosa Ziehau } 1189febc8c49SSepherosa Ziehau } 1190febc8c49SSepherosa Ziehau if (bootverbose) 11914eee58faSSepherosa Ziehau device_printf(sc->cst_dev, "non-C3 %d\n", sc->cst_non_c3); 1192febc8c49SSepherosa Ziehau } 11934cf48621SSepherosa Ziehau 11944cf48621SSepherosa Ziehau /* 11954cf48621SSepherosa Ziehau * Update the largest Cx state supported in the global cpu_cx_count. 11964cf48621SSepherosa Ziehau * It will be used in the global Cx sysctl handler. 11974cf48621SSepherosa Ziehau */ 11984cf48621SSepherosa Ziehau static void 11994cf48621SSepherosa Ziehau acpi_cpu_global_cx_count(void) 12004cf48621SSepherosa Ziehau { 12014eee58faSSepherosa Ziehau struct acpi_cst_softc *sc; 12024cf48621SSepherosa Ziehau int i; 12034cf48621SSepherosa Ziehau 12044cf48621SSepherosa Ziehau if (cpu_ndevices == 0) { 12054cf48621SSepherosa Ziehau cpu_cx_count = 0; 12064cf48621SSepherosa Ziehau return; 12074cf48621SSepherosa Ziehau } 12084cf48621SSepherosa Ziehau 12094cf48621SSepherosa Ziehau sc = device_get_softc(cpu_devices[0]); 12104eee58faSSepherosa Ziehau cpu_cx_count = sc->cst_cx_count; 12114cf48621SSepherosa Ziehau 12124cf48621SSepherosa Ziehau for (i = 1; i < cpu_ndevices; i++) { 12134eee58faSSepherosa Ziehau struct acpi_cst_softc *sc = device_get_softc(cpu_devices[i]); 12144cf48621SSepherosa Ziehau 12154eee58faSSepherosa Ziehau if (sc->cst_cx_count < cpu_cx_count) 12164eee58faSSepherosa Ziehau cpu_cx_count = sc->cst_cx_count; 12174cf48621SSepherosa Ziehau } 12184cf48621SSepherosa Ziehau if (bootverbose) 12194cf48621SSepherosa Ziehau kprintf("cpu_cst: global Cx count %d\n", cpu_cx_count); 12204cf48621SSepherosa Ziehau } 1221