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> 4156a70eadSNate Lawson #include <sys/sbuf.h> 426b74f9b7SNate Lawson #include <sys/smp.h> 43fec754d4SMike Smith 446b74f9b7SNate Lawson #include <dev/pci/pcivar.h> 4556a70eadSNate Lawson #include <machine/atomic.h> 46fec754d4SMike Smith #include <machine/bus.h> 4756a70eadSNate Lawson #include <sys/rman.h> 48fec754d4SMike Smith 492a191126SDavid E. O'Brien #include <contrib/dev/acpica/acpi.h> 50fec754d4SMike Smith #include <dev/acpica/acpivar.h> 51fec754d4SMike Smith 52fec754d4SMike Smith /* 538c5468e3SNate Lawson * Support for ACPI Processor devices, including C[1-3] sleep states. 54fec754d4SMike Smith */ 55fec754d4SMike Smith 56be2b1797SNate Lawson /* Hooks for the ACPI CA debugging infrastructure */ 57fec754d4SMike Smith #define _COMPONENT ACPI_PROCESSOR 589127281cSMike Smith ACPI_MODULE_NAME("PROCESSOR") 59fec754d4SMike Smith 606b74f9b7SNate Lawson struct acpi_cx { 616b74f9b7SNate Lawson struct resource *p_lvlx; /* Register to read to enter state. */ 626b74f9b7SNate Lawson uint32_t type; /* C1-3 (C4 and up treated as C3). */ 636b74f9b7SNate Lawson uint32_t trans_lat; /* Transition latency (usec). */ 646b74f9b7SNate Lawson uint32_t power; /* Power consumed (mW). */ 65f4eb0418SNate Lawson int res_type; /* Resource type for p_lvlx. */ 666b74f9b7SNate Lawson }; 676b74f9b7SNate Lawson #define MAX_CX_STATES 8 686b74f9b7SNate Lawson 69fec754d4SMike Smith struct acpi_cpu_softc { 70fec754d4SMike Smith device_t cpu_dev; 71fec754d4SMike Smith ACPI_HANDLE cpu_handle; 7298aa9cd0SNate Lawson struct pcpu *cpu_pcpu; 7398aa9cd0SNate Lawson uint32_t cpu_acpi_id; /* ACPI processor id */ 7456a70eadSNate Lawson uint32_t cpu_p_blk; /* ACPI P_BLK location */ 7556a70eadSNate Lawson uint32_t cpu_p_blk_len; /* P_BLK length (must be 6). */ 766b74f9b7SNate Lawson struct acpi_cx cpu_cx_states[MAX_CX_STATES]; 7756a70eadSNate Lawson int cpu_cx_count; /* Number of valid Cx states. */ 78a2afe45aSNate Lawson int cpu_prev_sleep;/* Last idle sleep duration. */ 79b29224c2SNate Lawson int cpu_features; /* Child driver supported features. */ 80907b6777SNate Lawson /* Runtime state. */ 81907b6777SNate Lawson int cpu_non_c3; /* Index of lowest non-C3 state. */ 82907b6777SNate Lawson int cpu_short_slp; /* Count of < 1us sleeps. */ 83907b6777SNate Lawson u_int cpu_cx_stats[MAX_CX_STATES];/* Cx usage history. */ 84907b6777SNate Lawson /* Values for sysctl. */ 85907b6777SNate Lawson struct sysctl_ctx_list cpu_sysctl_ctx; 86907b6777SNate Lawson struct sysctl_oid *cpu_sysctl_tree; 87907b6777SNate Lawson int cpu_cx_lowest; 88907b6777SNate Lawson char cpu_cx_supported[64]; 89907b6777SNate Lawson int cpu_rid; 90fec754d4SMike Smith }; 91fec754d4SMike Smith 9298aa9cd0SNate Lawson struct acpi_cpu_device { 9398aa9cd0SNate Lawson struct resource_list ad_rl; 9498aa9cd0SNate Lawson }; 9598aa9cd0SNate Lawson 966b74f9b7SNate Lawson #define CPU_GET_REG(reg, width) \ 976b74f9b7SNate Lawson (bus_space_read_ ## width(rman_get_bustag((reg)), \ 986b74f9b7SNate Lawson rman_get_bushandle((reg)), 0)) 996b74f9b7SNate Lawson #define CPU_SET_REG(reg, width, val) \ 1006b74f9b7SNate Lawson (bus_space_write_ ## width(rman_get_bustag((reg)), \ 1016b74f9b7SNate Lawson rman_get_bushandle((reg)), 0, (val))) 102be2b1797SNate Lawson 1036b74f9b7SNate Lawson #define PM_USEC(x) ((x) >> 2) /* ~4 clocks per usec (3.57955 Mhz) */ 104fec754d4SMike Smith 1058b888c66SNate Lawson #define ACPI_NOTIFY_CX_STATES 0x81 /* _CST changed. */ 106fec754d4SMike Smith 10718ececa0SNate Lawson #define CPU_QUIRK_NO_C3 (1<<0) /* C3-type states are not usable. */ 10818ececa0SNate Lawson #define CPU_QUIRK_NO_BM_CTRL (1<<2) /* No bus mastering control. */ 1096b74f9b7SNate Lawson 1106b74f9b7SNate Lawson #define PCI_VENDOR_INTEL 0x8086 1116b74f9b7SNate Lawson #define PCI_DEVICE_82371AB_3 0x7113 /* PIIX4 chipset for quirks. */ 1126b74f9b7SNate Lawson #define PCI_REVISION_A_STEP 0 1136b74f9b7SNate Lawson #define PCI_REVISION_B_STEP 1 1146b74f9b7SNate Lawson #define PCI_REVISION_4E 2 1156b74f9b7SNate Lawson #define PCI_REVISION_4M 3 1168a000acaSRui Paulo #define PIIX4_DEVACTB_REG 0x58 1178a000acaSRui Paulo #define PIIX4_BRLD_EN_IRQ0 (1<<0) 1188a000acaSRui Paulo #define PIIX4_BRLD_EN_IRQ (1<<1) 1198a000acaSRui Paulo #define PIIX4_BRLD_EN_IRQ8 (1<<5) 1208a000acaSRui Paulo #define PIIX4_STOP_BREAK_MASK (PIIX4_BRLD_EN_IRQ0 | PIIX4_BRLD_EN_IRQ | PIIX4_BRLD_EN_IRQ8) 1218a000acaSRui Paulo #define PIIX4_PCNTRL_BST_EN (1<<10) 1226b74f9b7SNate Lawson 1236b74f9b7SNate Lawson /* Platform hardware resource information. */ 1246b74f9b7SNate Lawson static uint32_t cpu_smi_cmd; /* Value to write to SMI_CMD. */ 12556a70eadSNate Lawson static uint8_t cpu_cst_cnt; /* Indicate we are _CST aware. */ 126a2afe45aSNate Lawson static int cpu_quirks; /* Indicate any hardware bugs. */ 1276b74f9b7SNate Lawson 1286b74f9b7SNate Lawson /* Runtime state. */ 129907b6777SNate Lawson static int cpu_disable_idle; /* Disable entry to idle function */ 130907b6777SNate Lawson static int cpu_cx_count; /* Number of valid Cx states */ 1316b74f9b7SNate Lawson 1326b74f9b7SNate Lawson /* Values for sysctl. */ 133907b6777SNate Lawson static struct sysctl_ctx_list cpu_sysctl_ctx; 134907b6777SNate Lawson static struct sysctl_oid *cpu_sysctl_tree; 135907b6777SNate Lawson static int cpu_cx_generic; 1366b74f9b7SNate Lawson static int cpu_cx_lowest; 137fec754d4SMike Smith 138fec754d4SMike Smith static device_t *cpu_devices; 139fec754d4SMike Smith static int cpu_ndevices; 140447a5fa1SJohn Baldwin static struct acpi_cpu_softc **cpu_softc; 141d92a2ebdSNate Lawson ACPI_SERIAL_DECL(cpu, "ACPI CPU"); 142fec754d4SMike Smith 143fec754d4SMike Smith static int acpi_cpu_probe(device_t dev); 144fec754d4SMike Smith static int acpi_cpu_attach(device_t dev); 1453331373cSNate Lawson static int acpi_cpu_suspend(device_t dev); 1463331373cSNate Lawson static int acpi_cpu_resume(device_t dev); 147b6426963SNate Lawson static int acpi_pcpu_get_id(uint32_t idx, uint32_t *acpi_id, 148b6426963SNate Lawson uint32_t *cpu_id); 14998aa9cd0SNate Lawson static struct resource_list *acpi_cpu_get_rlist(device_t dev, device_t child); 15098aa9cd0SNate Lawson static device_t acpi_cpu_add_child(device_t dev, int order, const char *name, 15198aa9cd0SNate Lawson int unit); 15298aa9cd0SNate Lawson static int acpi_cpu_read_ivar(device_t dev, device_t child, int index, 15398aa9cd0SNate Lawson uintptr_t *result); 15456a70eadSNate Lawson static int acpi_cpu_shutdown(device_t dev); 155907b6777SNate Lawson static void acpi_cpu_cx_probe(struct acpi_cpu_softc *sc); 156907b6777SNate Lawson static void acpi_cpu_generic_cx_probe(struct acpi_cpu_softc *sc); 1576b74f9b7SNate Lawson static int acpi_cpu_cx_cst(struct acpi_cpu_softc *sc); 1586b74f9b7SNate Lawson static void acpi_cpu_startup(void *arg); 159907b6777SNate Lawson static void acpi_cpu_startup_cx(struct acpi_cpu_softc *sc); 16089ab2a7aSRui Paulo static void acpi_cpu_cx_list(struct acpi_cpu_softc *sc); 1616b74f9b7SNate Lawson static void acpi_cpu_idle(void); 1626b74f9b7SNate Lawson static void acpi_cpu_notify(ACPI_HANDLE h, UINT32 notify, void *context); 163907b6777SNate Lawson static int acpi_cpu_quirks(void); 164a2afe45aSNate Lawson static int acpi_cpu_usage_sysctl(SYSCTL_HANDLER_ARGS); 1653331373cSNate Lawson static int acpi_cpu_set_cx_lowest(struct acpi_cpu_softc *sc, int val); 1666b74f9b7SNate Lawson static int acpi_cpu_cx_lowest_sysctl(SYSCTL_HANDLER_ARGS); 167907b6777SNate Lawson static int acpi_cpu_global_cx_lowest_sysctl(SYSCTL_HANDLER_ARGS); 168fec754d4SMike Smith 169fec754d4SMike Smith static device_method_t acpi_cpu_methods[] = { 170fec754d4SMike Smith /* Device interface */ 171fec754d4SMike Smith DEVMETHOD(device_probe, acpi_cpu_probe), 172fec754d4SMike Smith DEVMETHOD(device_attach, acpi_cpu_attach), 17398aa9cd0SNate Lawson DEVMETHOD(device_detach, bus_generic_detach), 17456a70eadSNate Lawson DEVMETHOD(device_shutdown, acpi_cpu_shutdown), 1753331373cSNate Lawson DEVMETHOD(device_suspend, acpi_cpu_suspend), 1763331373cSNate Lawson DEVMETHOD(device_resume, acpi_cpu_resume), 17798aa9cd0SNate Lawson 17898aa9cd0SNate Lawson /* Bus interface */ 17998aa9cd0SNate Lawson DEVMETHOD(bus_add_child, acpi_cpu_add_child), 18098aa9cd0SNate Lawson DEVMETHOD(bus_read_ivar, acpi_cpu_read_ivar), 18198aa9cd0SNate Lawson DEVMETHOD(bus_get_resource_list, acpi_cpu_get_rlist), 18298aa9cd0SNate Lawson DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource), 18398aa9cd0SNate Lawson DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource), 18498aa9cd0SNate Lawson DEVMETHOD(bus_alloc_resource, bus_generic_rl_alloc_resource), 18598aa9cd0SNate Lawson DEVMETHOD(bus_release_resource, bus_generic_rl_release_resource), 18698aa9cd0SNate Lawson DEVMETHOD(bus_driver_added, bus_generic_driver_added), 18798aa9cd0SNate Lawson DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 18898aa9cd0SNate Lawson DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 18998aa9cd0SNate Lawson DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 19098aa9cd0SNate Lawson DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 191fec754d4SMike Smith 192fec754d4SMike Smith {0, 0} 193fec754d4SMike Smith }; 194fec754d4SMike Smith 195fec754d4SMike Smith static driver_t acpi_cpu_driver = { 196b0e2b625SNate Lawson "cpu", 197fec754d4SMike Smith acpi_cpu_methods, 198fec754d4SMike Smith sizeof(struct acpi_cpu_softc), 199fec754d4SMike Smith }; 200fec754d4SMike Smith 2013045c8afSNate Lawson static devclass_t acpi_cpu_devclass; 2023045c8afSNate Lawson DRIVER_MODULE(cpu, acpi, acpi_cpu_driver, acpi_cpu_devclass, 0, 0); 203b0e2b625SNate Lawson MODULE_DEPEND(cpu, acpi, 1, 1, 1); 20456a70eadSNate Lawson 205fec754d4SMike Smith static int 206fec754d4SMike Smith acpi_cpu_probe(device_t dev) 207fec754d4SMike Smith { 208b29224c2SNate Lawson int acpi_id, cpu_id; 209b0e2b625SNate Lawson ACPI_BUFFER buf; 210b0e2b625SNate Lawson ACPI_HANDLE handle; 211b0e2b625SNate Lawson ACPI_OBJECT *obj; 212b0e2b625SNate Lawson ACPI_STATUS status; 213b0e2b625SNate Lawson 214b0e2b625SNate Lawson if (acpi_disabled("cpu") || acpi_get_type(dev) != ACPI_TYPE_PROCESSOR) 215b0e2b625SNate Lawson return (ENXIO); 216b0e2b625SNate Lawson 217b0e2b625SNate Lawson handle = acpi_get_handle(dev); 218447a5fa1SJohn Baldwin if (cpu_softc == NULL) 219447a5fa1SJohn Baldwin cpu_softc = malloc(sizeof(struct acpi_cpu_softc *) * 220447a5fa1SJohn Baldwin (mp_maxid + 1), M_TEMP /* XXX */, M_WAITOK | M_ZERO); 221b0e2b625SNate Lawson 222b0e2b625SNate Lawson /* Get our Processor object. */ 223b0e2b625SNate Lawson buf.Pointer = NULL; 224b0e2b625SNate Lawson buf.Length = ACPI_ALLOCATE_BUFFER; 225b0e2b625SNate Lawson status = AcpiEvaluateObject(handle, NULL, NULL, &buf); 226b0e2b625SNate Lawson if (ACPI_FAILURE(status)) { 227b0e2b625SNate Lawson device_printf(dev, "probe failed to get Processor obj - %s\n", 228b0e2b625SNate Lawson AcpiFormatException(status)); 229b0e2b625SNate Lawson return (ENXIO); 230b0e2b625SNate Lawson } 231b0e2b625SNate Lawson obj = (ACPI_OBJECT *)buf.Pointer; 232b0e2b625SNate Lawson if (obj->Type != ACPI_TYPE_PROCESSOR) { 233b0e2b625SNate Lawson device_printf(dev, "Processor object has bad type %d\n", obj->Type); 234b0e2b625SNate Lawson AcpiOsFree(obj); 235b0e2b625SNate Lawson return (ENXIO); 236fec754d4SMike Smith } 237be2b1797SNate Lawson 238b0e2b625SNate Lawson /* 239b0e2b625SNate Lawson * Find the processor associated with our unit. We could use the 240b0e2b625SNate Lawson * ProcId as a key, however, some boxes do not have the same values 241b0e2b625SNate Lawson * in their Processor object as the ProcId values in the MADT. 242b0e2b625SNate Lawson */ 243b0e2b625SNate Lawson acpi_id = obj->Processor.ProcId; 244b0e2b625SNate Lawson AcpiOsFree(obj); 245b0e2b625SNate Lawson if (acpi_pcpu_get_id(device_get_unit(dev), &acpi_id, &cpu_id) != 0) 246fec754d4SMike Smith return (ENXIO); 247b0e2b625SNate Lawson 248b0e2b625SNate Lawson /* 249b0e2b625SNate Lawson * Check if we already probed this processor. We scan the bus twice 250b0e2b625SNate Lawson * so it's possible we've already seen this one. 251b0e2b625SNate Lawson */ 252b0e2b625SNate Lawson if (cpu_softc[cpu_id] != NULL) 253b0e2b625SNate Lawson return (ENXIO); 254b0e2b625SNate Lawson 255b0e2b625SNate Lawson /* Mark this processor as in-use and save our derived id for attach. */ 256b0e2b625SNate Lawson cpu_softc[cpu_id] = (void *)1; 257b0e2b625SNate Lawson acpi_set_magic(dev, cpu_id); 258b29224c2SNate Lawson device_set_desc(dev, "ACPI CPU"); 259b0e2b625SNate Lawson 260b0e2b625SNate Lawson return (0); 261fec754d4SMike Smith } 262fec754d4SMike Smith 263fec754d4SMike Smith static int 264fec754d4SMike Smith acpi_cpu_attach(device_t dev) 265fec754d4SMike Smith { 266b0e2b625SNate Lawson ACPI_BUFFER buf; 267c961facaSNate Lawson ACPI_OBJECT arg[4], *obj; 268bce92885SNate Lawson ACPI_OBJECT_LIST arglist; 26998aa9cd0SNate Lawson struct pcpu *pcpu_data; 270fec754d4SMike Smith struct acpi_cpu_softc *sc; 271fec754d4SMike Smith struct acpi_softc *acpi_sc; 272fec754d4SMike Smith ACPI_STATUS status; 273b29224c2SNate Lawson u_int features; 274b29224c2SNate Lawson int cpu_id, drv_count, i; 275b29224c2SNate Lawson driver_t **drivers; 276bce92885SNate Lawson uint32_t cap_set[3]; 277fec754d4SMike Smith 278c961facaSNate Lawson /* UUID needed by _OSC evaluation */ 279c961facaSNate Lawson static uint8_t cpu_oscuuid[16] = { 0x16, 0xA6, 0x77, 0x40, 0x0C, 0x29, 280c961facaSNate Lawson 0xBE, 0x47, 0x9E, 0xBD, 0xD8, 0x70, 281c961facaSNate Lawson 0x58, 0x71, 0x39, 0x53 }; 282c961facaSNate Lawson 283b4a05238SPeter Wemm ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 284fec754d4SMike Smith 285fec754d4SMike Smith sc = device_get_softc(dev); 286fec754d4SMike Smith sc->cpu_dev = dev; 287fec754d4SMike Smith sc->cpu_handle = acpi_get_handle(dev); 28898aa9cd0SNate Lawson cpu_id = acpi_get_magic(dev); 28998aa9cd0SNate Lawson cpu_softc[cpu_id] = sc; 29098aa9cd0SNate Lawson pcpu_data = pcpu_find(cpu_id); 29198aa9cd0SNate Lawson pcpu_data->pc_device = dev; 29298aa9cd0SNate Lawson sc->cpu_pcpu = pcpu_data; 2932be4e471SJung-uk Kim cpu_smi_cmd = AcpiGbl_FADT.SmiCommand; 2942be4e471SJung-uk Kim cpu_cst_cnt = AcpiGbl_FADT.CstControl; 295fec754d4SMike Smith 296b0e2b625SNate Lawson buf.Pointer = NULL; 297b0e2b625SNate Lawson buf.Length = ACPI_ALLOCATE_BUFFER; 2986b74f9b7SNate Lawson status = AcpiEvaluateObject(sc->cpu_handle, NULL, NULL, &buf); 2996b74f9b7SNate Lawson if (ACPI_FAILURE(status)) { 300b0e2b625SNate Lawson device_printf(dev, "attach failed to get Processor obj - %s\n", 3016b74f9b7SNate Lawson AcpiFormatException(status)); 3026b74f9b7SNate Lawson return (ENXIO); 303b0e2b625SNate Lawson } 304b0e2b625SNate Lawson obj = (ACPI_OBJECT *)buf.Pointer; 305b0e2b625SNate Lawson sc->cpu_p_blk = obj->Processor.PblkAddress; 306b0e2b625SNate Lawson sc->cpu_p_blk_len = obj->Processor.PblkLength; 30798aa9cd0SNate Lawson sc->cpu_acpi_id = obj->Processor.ProcId; 308b0e2b625SNate Lawson AcpiOsFree(obj); 30956a70eadSNate Lawson ACPI_DEBUG_PRINT((ACPI_DB_INFO, "acpi_cpu%d: P_BLK at %#x/%d\n", 31056a70eadSNate Lawson device_get_unit(dev), sc->cpu_p_blk, sc->cpu_p_blk_len)); 3116b74f9b7SNate Lawson 312907b6777SNate Lawson /* 313907b6777SNate Lawson * If this is the first cpu we attach, create and initialize the generic 314907b6777SNate Lawson * resources that will be used by all acpi cpu devices. 315907b6777SNate Lawson */ 316907b6777SNate Lawson if (device_get_unit(dev) == 0) { 317907b6777SNate Lawson /* Assume we won't be using generic Cx mode by default */ 318907b6777SNate Lawson cpu_cx_generic = FALSE; 319907b6777SNate Lawson 320907b6777SNate Lawson /* Install hw.acpi.cpu sysctl tree */ 321fec754d4SMike Smith acpi_sc = acpi_device_get_parent_softc(dev); 322907b6777SNate Lawson sysctl_ctx_init(&cpu_sysctl_ctx); 323907b6777SNate Lawson cpu_sysctl_tree = SYSCTL_ADD_NODE(&cpu_sysctl_ctx, 32498aa9cd0SNate Lawson SYSCTL_CHILDREN(acpi_sc->acpi_sysctl_tree), OID_AUTO, "cpu", 325907b6777SNate Lawson CTLFLAG_RD, 0, "node for CPU children"); 326907b6777SNate Lawson 327907b6777SNate Lawson /* Queue post cpu-probing task handler */ 3282be4e471SJung-uk Kim AcpiOsExecute(OSL_NOTIFY_HANDLER, acpi_cpu_startup, NULL); 329907b6777SNate Lawson } 330fec754d4SMike Smith 3316b74f9b7SNate Lawson /* 332b29224c2SNate Lawson * Before calling any CPU methods, collect child driver feature hints 333f2d94257SNate Lawson * and notify ACPI of them. We support unified SMP power control 334f2d94257SNate Lawson * so advertise this ourselves. Note this is not the same as independent 335f2d94257SNate Lawson * SMP control where each CPU can have different settings. 336b29224c2SNate Lawson */ 337f2d94257SNate Lawson sc->cpu_features = ACPI_CAP_SMP_SAME | ACPI_CAP_SMP_SAME_C3; 338b29224c2SNate Lawson if (devclass_get_drivers(acpi_cpu_devclass, &drivers, &drv_count) == 0) { 339b29224c2SNate Lawson for (i = 0; i < drv_count; i++) { 340b29224c2SNate Lawson if (ACPI_GET_FEATURES(drivers[i], &features) == 0) 341b29224c2SNate Lawson sc->cpu_features |= features; 342b29224c2SNate Lawson } 343b29224c2SNate Lawson free(drivers, M_TEMP); 344b29224c2SNate Lawson } 345bce92885SNate Lawson 346bce92885SNate Lawson /* 347bce92885SNate Lawson * CPU capabilities are specified as a buffer of 32-bit integers: 348bce92885SNate Lawson * revision, count, and one or more capabilities. The revision of 349c961facaSNate Lawson * "1" is not specified anywhere but seems to match Linux. 350bce92885SNate Lawson */ 351bce92885SNate Lawson if (sc->cpu_features) { 352c961facaSNate Lawson arglist.Pointer = arg; 353bce92885SNate Lawson arglist.Count = 1; 354c961facaSNate Lawson arg[0].Type = ACPI_TYPE_BUFFER; 355c961facaSNate Lawson arg[0].Buffer.Length = sizeof(cap_set); 356c961facaSNate Lawson arg[0].Buffer.Pointer = (uint8_t *)cap_set; 357bce92885SNate Lawson cap_set[0] = 1; /* revision */ 358bce92885SNate Lawson cap_set[1] = 1; /* number of capabilities integers */ 359bce92885SNate Lawson cap_set[2] = sc->cpu_features; 360bce92885SNate Lawson AcpiEvaluateObject(sc->cpu_handle, "_PDC", &arglist, NULL); 361c961facaSNate Lawson 362c961facaSNate Lawson /* 363c961facaSNate Lawson * On some systems we need to evaluate _OSC so that the ASL 364c961facaSNate Lawson * loads the _PSS and/or _PDC methods at runtime. 365c961facaSNate Lawson * 366c961facaSNate Lawson * TODO: evaluate failure of _OSC. 367c961facaSNate Lawson */ 368c961facaSNate Lawson arglist.Pointer = arg; 369c961facaSNate Lawson arglist.Count = 4; 370c961facaSNate Lawson arg[0].Type = ACPI_TYPE_BUFFER; 371c961facaSNate Lawson arg[0].Buffer.Length = sizeof(cpu_oscuuid); 372c961facaSNate Lawson arg[0].Buffer.Pointer = cpu_oscuuid; /* UUID */ 373c961facaSNate Lawson arg[1].Type = ACPI_TYPE_INTEGER; 374c961facaSNate Lawson arg[1].Integer.Value = 1; /* revision */ 375c961facaSNate Lawson arg[2].Type = ACPI_TYPE_INTEGER; 376c961facaSNate Lawson arg[2].Integer.Value = 1; /* count */ 377c961facaSNate Lawson arg[3].Type = ACPI_TYPE_BUFFER; 378c961facaSNate Lawson arg[3].Buffer.Length = sizeof(cap_set); /* Capabilities buffer */ 379c961facaSNate Lawson arg[3].Buffer.Pointer = (uint8_t *)cap_set; 380c961facaSNate Lawson cap_set[0] = 0; 381c961facaSNate Lawson AcpiEvaluateObject(sc->cpu_handle, "_OSC", &arglist, NULL); 382bce92885SNate Lawson } 383b29224c2SNate Lawson 384907b6777SNate Lawson /* Probe for Cx state support. */ 385907b6777SNate Lawson acpi_cpu_cx_probe(sc); 3866b74f9b7SNate Lawson 387b29224c2SNate Lawson /* Finally, call identify and probe/attach for child devices. */ 38898aa9cd0SNate Lawson bus_generic_probe(dev); 38998aa9cd0SNate Lawson bus_generic_attach(dev); 39098aa9cd0SNate Lawson 39198aa9cd0SNate Lawson return (0); 3926b74f9b7SNate Lawson } 3936b74f9b7SNate Lawson 394b6426963SNate Lawson /* 3953331373cSNate Lawson * Disable any entry to the idle function during suspend and re-enable it 3963331373cSNate Lawson * during resume. 3973331373cSNate Lawson */ 3983331373cSNate Lawson static int 3993331373cSNate Lawson acpi_cpu_suspend(device_t dev) 4003331373cSNate Lawson { 4013331373cSNate Lawson int error; 4023331373cSNate Lawson 4033331373cSNate Lawson error = bus_generic_suspend(dev); 4043331373cSNate Lawson if (error) 4053331373cSNate Lawson return (error); 4063331373cSNate Lawson cpu_disable_idle = TRUE; 4073331373cSNate Lawson return (0); 4083331373cSNate Lawson } 4093331373cSNate Lawson 4103331373cSNate Lawson static int 4113331373cSNate Lawson acpi_cpu_resume(device_t dev) 4123331373cSNate Lawson { 4133331373cSNate Lawson 4143331373cSNate Lawson cpu_disable_idle = FALSE; 4153331373cSNate Lawson return (bus_generic_resume(dev)); 4163331373cSNate Lawson } 4173331373cSNate Lawson 4183331373cSNate Lawson /* 419b6426963SNate Lawson * Find the nth present CPU and return its pc_cpuid as well as set the 420b6426963SNate Lawson * pc_acpi_id from the most reliable source. 421b6426963SNate Lawson */ 422b6426963SNate Lawson static int 423b6426963SNate Lawson acpi_pcpu_get_id(uint32_t idx, uint32_t *acpi_id, uint32_t *cpu_id) 424b6426963SNate Lawson { 425b6426963SNate Lawson struct pcpu *pcpu_data; 426b6426963SNate Lawson uint32_t i; 427b6426963SNate Lawson 428b6426963SNate Lawson KASSERT(acpi_id != NULL, ("Null acpi_id")); 429b6426963SNate Lawson KASSERT(cpu_id != NULL, ("Null cpu_id")); 430447a5fa1SJohn Baldwin for (i = 0; i <= mp_maxid; i++) { 431b6426963SNate Lawson if (CPU_ABSENT(i)) 432b6426963SNate Lawson continue; 433b6426963SNate Lawson pcpu_data = pcpu_find(i); 434b6426963SNate Lawson KASSERT(pcpu_data != NULL, ("no pcpu data for %d", i)); 435b6426963SNate Lawson if (idx-- == 0) { 436b6426963SNate Lawson /* 437b6426963SNate Lawson * If pc_acpi_id was not initialized (e.g., a non-APIC UP box) 438b6426963SNate Lawson * override it with the value from the ASL. Otherwise, if the 439b6426963SNate Lawson * two don't match, prefer the MADT-derived value. Finally, 440b6426963SNate Lawson * return the pc_cpuid to reference this processor. 441b6426963SNate Lawson */ 442b6426963SNate Lawson if (pcpu_data->pc_acpi_id == 0xffffffff) 443b6426963SNate Lawson pcpu_data->pc_acpi_id = *acpi_id; 444b6426963SNate Lawson else if (pcpu_data->pc_acpi_id != *acpi_id) 445b6426963SNate Lawson *acpi_id = pcpu_data->pc_acpi_id; 446b6426963SNate Lawson *cpu_id = pcpu_data->pc_cpuid; 447b6426963SNate Lawson return (0); 448b6426963SNate Lawson } 449b6426963SNate Lawson } 450b6426963SNate Lawson 451b6426963SNate Lawson return (ESRCH); 452b6426963SNate Lawson } 453b6426963SNate Lawson 45498aa9cd0SNate Lawson static struct resource_list * 45598aa9cd0SNate Lawson acpi_cpu_get_rlist(device_t dev, device_t child) 45698aa9cd0SNate Lawson { 45798aa9cd0SNate Lawson struct acpi_cpu_device *ad; 45898aa9cd0SNate Lawson 45998aa9cd0SNate Lawson ad = device_get_ivars(child); 46098aa9cd0SNate Lawson if (ad == NULL) 46198aa9cd0SNate Lawson return (NULL); 46298aa9cd0SNate Lawson return (&ad->ad_rl); 46398aa9cd0SNate Lawson } 46498aa9cd0SNate Lawson 46598aa9cd0SNate Lawson static device_t 46698aa9cd0SNate Lawson acpi_cpu_add_child(device_t dev, int order, const char *name, int unit) 46798aa9cd0SNate Lawson { 46898aa9cd0SNate Lawson struct acpi_cpu_device *ad; 46998aa9cd0SNate Lawson device_t child; 47098aa9cd0SNate Lawson 47198aa9cd0SNate Lawson if ((ad = malloc(sizeof(*ad), M_TEMP, M_NOWAIT | M_ZERO)) == NULL) 47298aa9cd0SNate Lawson return (NULL); 47398aa9cd0SNate Lawson 47498aa9cd0SNate Lawson resource_list_init(&ad->ad_rl); 47598aa9cd0SNate Lawson 47698aa9cd0SNate Lawson child = device_add_child_ordered(dev, order, name, unit); 47798aa9cd0SNate Lawson if (child != NULL) 47898aa9cd0SNate Lawson device_set_ivars(child, ad); 47943ce1c77SNate Lawson else 48043ce1c77SNate Lawson free(ad, M_TEMP); 48198aa9cd0SNate Lawson return (child); 48298aa9cd0SNate Lawson } 48398aa9cd0SNate Lawson 48498aa9cd0SNate Lawson static int 48598aa9cd0SNate Lawson acpi_cpu_read_ivar(device_t dev, device_t child, int index, uintptr_t *result) 48698aa9cd0SNate Lawson { 48798aa9cd0SNate Lawson struct acpi_cpu_softc *sc; 48898aa9cd0SNate Lawson 48998aa9cd0SNate Lawson sc = device_get_softc(dev); 49098aa9cd0SNate Lawson switch (index) { 49198aa9cd0SNate Lawson case ACPI_IVAR_HANDLE: 49298aa9cd0SNate Lawson *result = (uintptr_t)sc->cpu_handle; 49398aa9cd0SNate Lawson break; 49498aa9cd0SNate Lawson case CPU_IVAR_PCPU: 49598aa9cd0SNate Lawson *result = (uintptr_t)sc->cpu_pcpu; 49698aa9cd0SNate Lawson break; 49798aa9cd0SNate Lawson default: 49898aa9cd0SNate Lawson return (ENOENT); 49998aa9cd0SNate Lawson } 50098aa9cd0SNate Lawson return (0); 50198aa9cd0SNate Lawson } 50298aa9cd0SNate Lawson 5036b74f9b7SNate Lawson static int 50456a70eadSNate Lawson acpi_cpu_shutdown(device_t dev) 50556a70eadSNate Lawson { 50656a70eadSNate Lawson ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 50756a70eadSNate Lawson 50898aa9cd0SNate Lawson /* Allow children to shutdown first. */ 50998aa9cd0SNate Lawson bus_generic_shutdown(dev); 51098aa9cd0SNate Lawson 511cc3c11f9SNate Lawson /* 512cc3c11f9SNate Lawson * Disable any entry to the idle function. There is a small race where 513cc3c11f9SNate Lawson * an idle thread have passed this check but not gone to sleep. This 514cc3c11f9SNate Lawson * is ok since device_shutdown() does not free the softc, otherwise 515cc3c11f9SNate Lawson * we'd have to be sure all threads were evicted before returning. 516cc3c11f9SNate Lawson */ 517907b6777SNate Lawson cpu_disable_idle = TRUE; 51856a70eadSNate Lawson 51956a70eadSNate Lawson return_VALUE (0); 52056a70eadSNate Lawson } 52156a70eadSNate Lawson 522907b6777SNate Lawson static void 5236b74f9b7SNate Lawson acpi_cpu_cx_probe(struct acpi_cpu_softc *sc) 5246b74f9b7SNate Lawson { 525907b6777SNate Lawson ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 526907b6777SNate Lawson 527907b6777SNate Lawson /* Use initial sleep value of 1 sec. to start with lowest idle state. */ 528907b6777SNate Lawson sc->cpu_prev_sleep = 1000000; 529907b6777SNate Lawson sc->cpu_cx_lowest = 0; 530907b6777SNate Lawson 531907b6777SNate Lawson /* 532907b6777SNate Lawson * Check for the ACPI 2.0 _CST sleep states object. If we can't find 533907b6777SNate Lawson * any, we'll revert to generic FADT/P_BLK Cx control method which will 534907b6777SNate Lawson * be handled by acpi_cpu_startup. We need to defer to after having 535907b6777SNate Lawson * probed all the cpus in the system before probing for generic Cx 536907b6777SNate Lawson * states as we may already have found cpus with valid _CST packages 537907b6777SNate Lawson */ 538907b6777SNate Lawson if (!cpu_cx_generic && acpi_cpu_cx_cst(sc) != 0) { 539907b6777SNate Lawson /* 540907b6777SNate Lawson * We were unable to find a _CST package for this cpu or there 541907b6777SNate Lawson * was an error parsing it. Switch back to generic mode. 542907b6777SNate Lawson */ 543907b6777SNate Lawson cpu_cx_generic = TRUE; 544bd826803SNate Lawson if (bootverbose) 545bd826803SNate Lawson device_printf(sc->cpu_dev, "switching to generic Cx mode\n"); 546907b6777SNate Lawson } 547907b6777SNate Lawson 548907b6777SNate Lawson /* 549907b6777SNate Lawson * TODO: _CSD Package should be checked here. 550907b6777SNate Lawson */ 551907b6777SNate Lawson } 552907b6777SNate Lawson 553907b6777SNate Lawson static void 554907b6777SNate Lawson acpi_cpu_generic_cx_probe(struct acpi_cpu_softc *sc) 555907b6777SNate Lawson { 5566b74f9b7SNate Lawson ACPI_GENERIC_ADDRESS gas; 5576b74f9b7SNate Lawson struct acpi_cx *cx_ptr; 55856a70eadSNate Lawson 55956a70eadSNate Lawson sc->cpu_cx_count = 0; 5606b74f9b7SNate Lawson cx_ptr = sc->cpu_cx_states; 561fec754d4SMike Smith 562907b6777SNate Lawson /* Use initial sleep value of 1 sec. to start with lowest idle state. */ 563907b6777SNate Lawson sc->cpu_prev_sleep = 1000000; 564907b6777SNate Lawson 5656b74f9b7SNate Lawson /* C1 has been required since just after ACPI 1.0 */ 5666b74f9b7SNate Lawson cx_ptr->type = ACPI_STATE_C1; 5676b74f9b7SNate Lawson cx_ptr->trans_lat = 0; 5686b74f9b7SNate Lawson cx_ptr++; 56956a70eadSNate Lawson sc->cpu_cx_count++; 57056a70eadSNate Lawson 571c181b89bSNate Lawson /* 572c181b89bSNate Lawson * The spec says P_BLK must be 6 bytes long. However, some systems 573c181b89bSNate Lawson * use it to indicate a fractional set of features present so we 574c181b89bSNate Lawson * take 5 as C2. Some may also have a value of 7 to indicate 575c181b89bSNate Lawson * another C3 but most use _CST for this (as required) and having 576c181b89bSNate Lawson * "only" C1-C3 is not a hardship. 577c181b89bSNate Lawson */ 578c181b89bSNate Lawson if (sc->cpu_p_blk_len < 5) 579907b6777SNate Lawson return; 580fec754d4SMike Smith 5816b74f9b7SNate Lawson /* Validate and allocate resources for C2 (P_LVL2). */ 5822be4e471SJung-uk Kim gas.SpaceId = ACPI_ADR_SPACE_SYSTEM_IO; 5832be4e471SJung-uk Kim gas.BitWidth = 8; 5842be4e471SJung-uk Kim if (AcpiGbl_FADT.C2Latency <= 100) { 58556a70eadSNate Lawson gas.Address = sc->cpu_p_blk + 4; 586907b6777SNate Lawson acpi_bus_alloc_gas(sc->cpu_dev, &cx_ptr->res_type, &sc->cpu_rid, 587907b6777SNate Lawson &gas, &cx_ptr->p_lvlx, RF_SHAREABLE); 5886b74f9b7SNate Lawson if (cx_ptr->p_lvlx != NULL) { 589907b6777SNate Lawson sc->cpu_rid++; 5906b74f9b7SNate Lawson cx_ptr->type = ACPI_STATE_C2; 5912be4e471SJung-uk Kim cx_ptr->trans_lat = AcpiGbl_FADT.C2Latency; 5926b74f9b7SNate Lawson cx_ptr++; 59356a70eadSNate Lawson sc->cpu_cx_count++; 594fec754d4SMike Smith } 595fec754d4SMike Smith } 596c181b89bSNate Lawson if (sc->cpu_p_blk_len < 6) 597907b6777SNate Lawson return; 598be2b1797SNate Lawson 5996b74f9b7SNate Lawson /* Validate and allocate resources for C3 (P_LVL3). */ 6006e1de64dSRui Paulo if (AcpiGbl_FADT.C3Latency <= 1000 && !(cpu_quirks & CPU_QUIRK_NO_C3)) { 60156a70eadSNate Lawson gas.Address = sc->cpu_p_blk + 5; 602907b6777SNate Lawson acpi_bus_alloc_gas(sc->cpu_dev, &cx_ptr->res_type, &sc->cpu_rid, &gas, 603907b6777SNate Lawson &cx_ptr->p_lvlx, RF_SHAREABLE); 6046b74f9b7SNate Lawson if (cx_ptr->p_lvlx != NULL) { 605907b6777SNate Lawson sc->cpu_rid++; 6066b74f9b7SNate Lawson cx_ptr->type = ACPI_STATE_C3; 6072be4e471SJung-uk Kim cx_ptr->trans_lat = AcpiGbl_FADT.C3Latency; 6086b74f9b7SNate Lawson cx_ptr++; 60956a70eadSNate Lawson sc->cpu_cx_count++; 6106b74f9b7SNate Lawson } 6116b74f9b7SNate Lawson } 6126b74f9b7SNate Lawson 613907b6777SNate Lawson /* Update the largest cx_count seen so far */ 614907b6777SNate Lawson if (sc->cpu_cx_count > cpu_cx_count) 615907b6777SNate Lawson cpu_cx_count = sc->cpu_cx_count; 6166b74f9b7SNate Lawson } 6176b74f9b7SNate Lawson 6186b74f9b7SNate Lawson /* 6196b74f9b7SNate Lawson * Parse a _CST package and set up its Cx states. Since the _CST object 6206b74f9b7SNate Lawson * can change dynamically, our notify handler may call this function 6216b74f9b7SNate Lawson * to clean up and probe the new _CST package. 6226b74f9b7SNate Lawson */ 6236b74f9b7SNate Lawson static int 6246b74f9b7SNate Lawson acpi_cpu_cx_cst(struct acpi_cpu_softc *sc) 6256b74f9b7SNate Lawson { 6266b74f9b7SNate Lawson struct acpi_cx *cx_ptr; 6276b74f9b7SNate Lawson ACPI_STATUS status; 6286b74f9b7SNate Lawson ACPI_BUFFER buf; 6296b74f9b7SNate Lawson ACPI_OBJECT *top; 6306b74f9b7SNate Lawson ACPI_OBJECT *pkg; 6316b74f9b7SNate Lawson uint32_t count; 6326b74f9b7SNate Lawson int i; 6336b74f9b7SNate Lawson 63456a70eadSNate Lawson ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 63556a70eadSNate Lawson 6366b74f9b7SNate Lawson buf.Pointer = NULL; 6376b74f9b7SNate Lawson buf.Length = ACPI_ALLOCATE_BUFFER; 6386b74f9b7SNate Lawson status = AcpiEvaluateObject(sc->cpu_handle, "_CST", NULL, &buf); 639bd826803SNate Lawson if (ACPI_FAILURE(status)) 6406b74f9b7SNate Lawson return (ENXIO); 6416b74f9b7SNate Lawson 6426b74f9b7SNate Lawson /* _CST is a package with a count and at least one Cx package. */ 6436b74f9b7SNate Lawson top = (ACPI_OBJECT *)buf.Pointer; 64421cea91fSNate Lawson if (!ACPI_PKG_VALID(top, 2) || acpi_PkgInt32(top, 0, &count) != 0) { 645bd826803SNate Lawson device_printf(sc->cpu_dev, "invalid _CST package\n"); 6466b74f9b7SNate Lawson AcpiOsFree(buf.Pointer); 6476b74f9b7SNate Lawson return (ENXIO); 6486b74f9b7SNate Lawson } 6496b74f9b7SNate Lawson if (count != top->Package.Count - 1) { 650bd826803SNate Lawson device_printf(sc->cpu_dev, "invalid _CST state count (%d != %d)\n", 6516b74f9b7SNate Lawson count, top->Package.Count - 1); 6526b74f9b7SNate Lawson count = top->Package.Count - 1; 6536b74f9b7SNate Lawson } 6546b74f9b7SNate Lawson if (count > MAX_CX_STATES) { 65556a70eadSNate Lawson device_printf(sc->cpu_dev, "_CST has too many states (%d)\n", count); 6566b74f9b7SNate Lawson count = MAX_CX_STATES; 6576b74f9b7SNate Lawson } 6586b74f9b7SNate Lawson 6596b74f9b7SNate Lawson /* Set up all valid states. */ 66056a70eadSNate Lawson sc->cpu_cx_count = 0; 6616b74f9b7SNate Lawson cx_ptr = sc->cpu_cx_states; 6626b74f9b7SNate Lawson for (i = 0; i < count; i++) { 6636b74f9b7SNate Lawson pkg = &top->Package.Elements[i + 1]; 66421cea91fSNate Lawson if (!ACPI_PKG_VALID(pkg, 4) || 66521cea91fSNate Lawson acpi_PkgInt32(pkg, 1, &cx_ptr->type) != 0 || 66621cea91fSNate Lawson acpi_PkgInt32(pkg, 2, &cx_ptr->trans_lat) != 0 || 66721cea91fSNate Lawson acpi_PkgInt32(pkg, 3, &cx_ptr->power) != 0) { 66821cea91fSNate Lawson 66980f006a1SNate Lawson device_printf(sc->cpu_dev, "skipping invalid Cx state package\n"); 6706b74f9b7SNate Lawson continue; 6716b74f9b7SNate Lawson } 6726b74f9b7SNate Lawson 6736b74f9b7SNate Lawson /* Validate the state to see if we should use it. */ 6746b74f9b7SNate Lawson switch (cx_ptr->type) { 6756b74f9b7SNate Lawson case ACPI_STATE_C1: 676907b6777SNate Lawson sc->cpu_non_c3 = i; 6776b74f9b7SNate Lawson cx_ptr++; 67856a70eadSNate Lawson sc->cpu_cx_count++; 6796b74f9b7SNate Lawson continue; 6806b74f9b7SNate Lawson case ACPI_STATE_C2: 6816b74f9b7SNate Lawson if (cx_ptr->trans_lat > 100) { 68256a70eadSNate Lawson ACPI_DEBUG_PRINT((ACPI_DB_INFO, 68356a70eadSNate Lawson "acpi_cpu%d: C2[%d] not available.\n", 68456a70eadSNate Lawson device_get_unit(sc->cpu_dev), i)); 6856b74f9b7SNate Lawson continue; 6866b74f9b7SNate Lawson } 687907b6777SNate Lawson sc->cpu_non_c3 = i; 6886b74f9b7SNate Lawson break; 6896b74f9b7SNate Lawson case ACPI_STATE_C3: 6906b74f9b7SNate Lawson default: 6916b74f9b7SNate Lawson if (cx_ptr->trans_lat > 1000 || 6926b74f9b7SNate Lawson (cpu_quirks & CPU_QUIRK_NO_C3) != 0) { 6936b74f9b7SNate Lawson 69456a70eadSNate Lawson ACPI_DEBUG_PRINT((ACPI_DB_INFO, 69556a70eadSNate Lawson "acpi_cpu%d: C3[%d] not available.\n", 69656a70eadSNate Lawson device_get_unit(sc->cpu_dev), i)); 6976b74f9b7SNate Lawson continue; 6986b74f9b7SNate Lawson } 6996b74f9b7SNate Lawson break; 7006b74f9b7SNate Lawson } 7016b74f9b7SNate Lawson 7026b74f9b7SNate Lawson #ifdef notyet 7036b74f9b7SNate Lawson /* Free up any previous register. */ 7046b74f9b7SNate Lawson if (cx_ptr->p_lvlx != NULL) { 7056b74f9b7SNate Lawson bus_release_resource(sc->cpu_dev, 0, 0, cx_ptr->p_lvlx); 7066b74f9b7SNate Lawson cx_ptr->p_lvlx = NULL; 7076b74f9b7SNate Lawson } 7086b74f9b7SNate Lawson #endif 7096b74f9b7SNate Lawson 7106b74f9b7SNate Lawson /* Allocate the control register for C2 or C3. */ 711907b6777SNate Lawson acpi_PkgGas(sc->cpu_dev, pkg, 0, &cx_ptr->res_type, &sc->cpu_rid, 712907b6777SNate Lawson &cx_ptr->p_lvlx, RF_SHAREABLE); 713f4eb0418SNate Lawson if (cx_ptr->p_lvlx) { 714907b6777SNate Lawson sc->cpu_rid++; 71556a70eadSNate Lawson ACPI_DEBUG_PRINT((ACPI_DB_INFO, 71656a70eadSNate Lawson "acpi_cpu%d: Got C%d - %d latency\n", 71756a70eadSNate Lawson device_get_unit(sc->cpu_dev), cx_ptr->type, 71856a70eadSNate Lawson cx_ptr->trans_lat)); 7196b74f9b7SNate Lawson cx_ptr++; 72056a70eadSNate Lawson sc->cpu_cx_count++; 7216b74f9b7SNate Lawson } 7226b74f9b7SNate Lawson } 7236b74f9b7SNate Lawson AcpiOsFree(buf.Pointer); 7246b74f9b7SNate Lawson 7256b74f9b7SNate Lawson return (0); 726fec754d4SMike Smith } 727fec754d4SMike Smith 728fec754d4SMike Smith /* 729fec754d4SMike Smith * Call this *after* all CPUs have been attached. 730fec754d4SMike Smith */ 731fec754d4SMike Smith static void 7326b74f9b7SNate Lawson acpi_cpu_startup(void *arg) 733fec754d4SMike Smith { 73456a70eadSNate Lawson struct acpi_cpu_softc *sc; 735907b6777SNate Lawson int i; 736fec754d4SMike Smith 737be2b1797SNate Lawson /* Get set of CPU devices */ 7383045c8afSNate Lawson devclass_get_devices(acpi_cpu_devclass, &cpu_devices, &cpu_ndevices); 739fec754d4SMike Smith 74056a70eadSNate Lawson /* 741907b6777SNate Lawson * Setup any quirks that might necessary now that we have probed 742907b6777SNate Lawson * all the CPUs 74356a70eadSNate Lawson */ 744907b6777SNate Lawson acpi_cpu_quirks(); 745907b6777SNate Lawson 746907b6777SNate Lawson cpu_cx_count = 0; 747907b6777SNate Lawson if (cpu_cx_generic) { 748907b6777SNate Lawson /* 749907b6777SNate Lawson * We are using generic Cx mode, probe for available Cx states 750907b6777SNate Lawson * for all processors. 751907b6777SNate Lawson */ 75256a70eadSNate Lawson for (i = 0; i < cpu_ndevices; i++) { 75356a70eadSNate Lawson sc = device_get_softc(cpu_devices[i]); 754907b6777SNate Lawson acpi_cpu_generic_cx_probe(sc); 75556a70eadSNate Lawson } 756907b6777SNate Lawson 757907b6777SNate Lawson /* 758907b6777SNate Lawson * Find the highest Cx state common to all CPUs 759907b6777SNate Lawson * in the system, taking quirks into account. 760907b6777SNate Lawson */ 761907b6777SNate Lawson for (i = 0; i < cpu_ndevices; i++) { 762907b6777SNate Lawson sc = device_get_softc(cpu_devices[i]); 763907b6777SNate Lawson if (sc->cpu_cx_count < cpu_cx_count) 764907b6777SNate Lawson cpu_cx_count = sc->cpu_cx_count; 765907b6777SNate Lawson } 766907b6777SNate Lawson } else { 767907b6777SNate Lawson /* 768907b6777SNate Lawson * We are using _CST mode, remove C3 state if necessary. 769907b6777SNate Lawson * Update the largest Cx state supported in the global cpu_cx_count. 770907b6777SNate Lawson * It will be used in the global Cx sysctl handler. 771907b6777SNate Lawson * As we now know for sure that we will be using _CST mode 772907b6777SNate Lawson * install our notify handler. 773907b6777SNate Lawson */ 774907b6777SNate Lawson for (i = 0; i < cpu_ndevices; i++) { 775907b6777SNate Lawson sc = device_get_softc(cpu_devices[i]); 7767a310721SJohn Baldwin if (cpu_quirks & CPU_QUIRK_NO_C3) { 777907b6777SNate Lawson sc->cpu_cx_count = sc->cpu_non_c3 + 1; 778907b6777SNate Lawson } 779907b6777SNate Lawson if (sc->cpu_cx_count > cpu_cx_count) 780907b6777SNate Lawson cpu_cx_count = sc->cpu_cx_count; 781907b6777SNate Lawson AcpiInstallNotifyHandler(sc->cpu_handle, ACPI_DEVICE_NOTIFY, 782907b6777SNate Lawson acpi_cpu_notify, sc); 783907b6777SNate Lawson } 784907b6777SNate Lawson } 78556a70eadSNate Lawson 7868c5468e3SNate Lawson /* Perform Cx final initialization. */ 787907b6777SNate Lawson for (i = 0; i < cpu_ndevices; i++) { 788907b6777SNate Lawson sc = device_get_softc(cpu_devices[i]); 789907b6777SNate Lawson acpi_cpu_startup_cx(sc); 790907b6777SNate Lawson } 791907b6777SNate Lawson 792907b6777SNate Lawson /* Add a sysctl handler to handle global Cx lowest setting */ 793907b6777SNate Lawson SYSCTL_ADD_PROC(&cpu_sysctl_ctx, SYSCTL_CHILDREN(cpu_sysctl_tree), 794907b6777SNate Lawson OID_AUTO, "cx_lowest", CTLTYPE_STRING | CTLFLAG_RW, 795907b6777SNate Lawson NULL, 0, acpi_cpu_global_cx_lowest_sysctl, "A", 796907b6777SNate Lawson "Global lowest Cx sleep state to use"); 797907b6777SNate Lawson 798907b6777SNate Lawson /* Take over idling from cpu_idle_default(). */ 799907b6777SNate Lawson cpu_cx_lowest = 0; 800907b6777SNate Lawson cpu_disable_idle = FALSE; 801907b6777SNate Lawson cpu_idle_hook = acpi_cpu_idle; 8026b74f9b7SNate Lawson } 8036b74f9b7SNate Lawson 80456a70eadSNate Lawson static void 80589ab2a7aSRui Paulo acpi_cpu_cx_list(struct acpi_cpu_softc *sc) 80656a70eadSNate Lawson { 80756a70eadSNate Lawson struct sbuf sb; 80856a70eadSNate Lawson int i; 80956a70eadSNate Lawson 810ae56b59fSNate Lawson /* 811907b6777SNate Lawson * Set up the list of Cx states 812ae56b59fSNate Lawson */ 813907b6777SNate Lawson sc->cpu_non_c3 = 0; 814907b6777SNate Lawson sbuf_new(&sb, sc->cpu_cx_supported, sizeof(sc->cpu_cx_supported), 815907b6777SNate Lawson SBUF_FIXEDLEN); 816907b6777SNate Lawson for (i = 0; i < sc->cpu_cx_count; i++) { 817ccc09458SNate Lawson sbuf_printf(&sb, "C%d/%d ", i + 1, sc->cpu_cx_states[i].trans_lat); 818907b6777SNate Lawson if (sc->cpu_cx_states[i].type < ACPI_STATE_C3) 819907b6777SNate Lawson sc->cpu_non_c3 = i; 820ae56b59fSNate Lawson } 82156a70eadSNate Lawson sbuf_trim(&sb); 82256a70eadSNate Lawson sbuf_finish(&sb); 82389ab2a7aSRui Paulo } 82489ab2a7aSRui Paulo 82589ab2a7aSRui Paulo static void 82689ab2a7aSRui Paulo acpi_cpu_startup_cx(struct acpi_cpu_softc *sc) 82789ab2a7aSRui Paulo { 82889ab2a7aSRui Paulo acpi_cpu_cx_list(sc); 829907b6777SNate Lawson 830907b6777SNate Lawson SYSCTL_ADD_STRING(&sc->cpu_sysctl_ctx, 831907b6777SNate Lawson SYSCTL_CHILDREN(device_get_sysctl_tree(sc->cpu_dev)), 832907b6777SNate Lawson OID_AUTO, "cx_supported", CTLFLAG_RD, 833907b6777SNate Lawson sc->cpu_cx_supported, 0, 834907b6777SNate Lawson "Cx/microsecond values for supported Cx states"); 835907b6777SNate Lawson SYSCTL_ADD_PROC(&sc->cpu_sysctl_ctx, 836907b6777SNate Lawson SYSCTL_CHILDREN(device_get_sysctl_tree(sc->cpu_dev)), 837ccc09458SNate Lawson OID_AUTO, "cx_lowest", CTLTYPE_STRING | CTLFLAG_RW, 838907b6777SNate Lawson (void *)sc, 0, acpi_cpu_cx_lowest_sysctl, "A", 83956a70eadSNate Lawson "lowest Cx sleep state to use"); 840907b6777SNate Lawson SYSCTL_ADD_PROC(&sc->cpu_sysctl_ctx, 841907b6777SNate Lawson SYSCTL_CHILDREN(device_get_sysctl_tree(sc->cpu_dev)), 842a2afe45aSNate Lawson OID_AUTO, "cx_usage", CTLTYPE_STRING | CTLFLAG_RD, 843907b6777SNate Lawson (void *)sc, 0, acpi_cpu_usage_sysctl, "A", 844a2afe45aSNate Lawson "percent usage for each Cx state"); 84556a70eadSNate Lawson 84656a70eadSNate Lawson #ifdef notyet 84756a70eadSNate Lawson /* Signal platform that we can handle _CST notification. */ 848907b6777SNate Lawson if (!cpu_cx_generic && cpu_cst_cnt != 0) { 849d92a2ebdSNate Lawson ACPI_LOCK(acpi); 85056a70eadSNate Lawson AcpiOsWritePort(cpu_smi_cmd, cpu_cst_cnt, 8); 851d92a2ebdSNate Lawson ACPI_UNLOCK(acpi); 85256a70eadSNate Lawson } 85356a70eadSNate Lawson #endif 85456a70eadSNate Lawson } 85556a70eadSNate Lawson 856fec754d4SMike Smith /* 857a2afe45aSNate Lawson * Idle the CPU in the lowest state possible. This function is called with 858a2afe45aSNate Lawson * interrupts disabled. Note that once it re-enables interrupts, a task 859a2afe45aSNate Lawson * switch can occur so do not access shared data (i.e. the softc) after 860a2afe45aSNate Lawson * interrupts are re-enabled. 8616b74f9b7SNate Lawson */ 8626b74f9b7SNate Lawson static void 8636b74f9b7SNate Lawson acpi_cpu_idle() 8646b74f9b7SNate Lawson { 8656b74f9b7SNate Lawson struct acpi_cpu_softc *sc; 86656a70eadSNate Lawson struct acpi_cx *cx_next; 8676b74f9b7SNate Lawson uint32_t start_time, end_time; 868a2afe45aSNate Lawson int bm_active, cx_next_idx, i; 8696b74f9b7SNate Lawson 8706b74f9b7SNate Lawson /* If disabled, return immediately. */ 871907b6777SNate Lawson if (cpu_disable_idle) { 8726b74f9b7SNate Lawson ACPI_ENABLE_IRQS(); 8736b74f9b7SNate Lawson return; 8746b74f9b7SNate Lawson } 8756b74f9b7SNate Lawson 876cd1f3db9SNate Lawson /* 877cd1f3db9SNate Lawson * Look up our CPU id to get our softc. If it's NULL, we'll use C1 878cd1f3db9SNate Lawson * since there is no ACPI processor object for this CPU. This occurs 879cd1f3db9SNate Lawson * for logical CPUs in the HTT case. 880cd1f3db9SNate Lawson */ 881cd1f3db9SNate Lawson sc = cpu_softc[PCPU_GET(cpuid)]; 882cd1f3db9SNate Lawson if (sc == NULL) { 883cd1f3db9SNate Lawson acpi_cpu_c1(); 884cd1f3db9SNate Lawson return; 885cd1f3db9SNate Lawson } 886cd1f3db9SNate Lawson 887a2afe45aSNate Lawson /* 888a2afe45aSNate Lawson * If we slept 100 us or more, use the lowest Cx state. Otherwise, 889a2afe45aSNate Lawson * find the lowest state that has a latency less than or equal to 890a2afe45aSNate Lawson * the length of our last sleep. 891a2afe45aSNate Lawson */ 892907b6777SNate Lawson cx_next_idx = sc->cpu_cx_lowest; 89380f006a1SNate Lawson if (sc->cpu_prev_sleep < 100) { 89480f006a1SNate Lawson /* 89580f006a1SNate Lawson * If we sleep too short all the time, this system may not implement 89680f006a1SNate Lawson * C2/3 correctly (i.e. reads return immediately). In this case, 89780f006a1SNate Lawson * back off and use the next higher level. 898907b6777SNate Lawson * It seems that when you have a dual core cpu (like the Intel Core Duo) 899907b6777SNate Lawson * that both cores will get out of C3 state as soon as one of them 900907b6777SNate Lawson * requires it. This breaks the sleep detection logic as the sleep 901907b6777SNate Lawson * counter is local to each cpu. Disable the sleep logic for now as a 902907b6777SNate Lawson * workaround if there's more than one CPU. The right fix would probably 903907b6777SNate Lawson * be to add quirks for system that don't really support C3 state. 90480f006a1SNate Lawson */ 905907b6777SNate Lawson if (mp_ncpus < 2 && sc->cpu_prev_sleep <= 1) { 906907b6777SNate Lawson sc->cpu_short_slp++; 907907b6777SNate Lawson if (sc->cpu_short_slp == 1000 && sc->cpu_cx_lowest != 0) { 908907b6777SNate Lawson if (sc->cpu_non_c3 == sc->cpu_cx_lowest && sc->cpu_non_c3 != 0) 909907b6777SNate Lawson sc->cpu_non_c3--; 910907b6777SNate Lawson sc->cpu_cx_lowest--; 911907b6777SNate Lawson sc->cpu_short_slp = 0; 91280f006a1SNate Lawson device_printf(sc->cpu_dev, 91380f006a1SNate Lawson "too many short sleeps, backing off to C%d\n", 914907b6777SNate Lawson sc->cpu_cx_lowest + 1); 91580f006a1SNate Lawson } 91680f006a1SNate Lawson } else 917907b6777SNate Lawson sc->cpu_short_slp = 0; 91880f006a1SNate Lawson 919907b6777SNate Lawson for (i = sc->cpu_cx_lowest; i >= 0; i--) 920a2afe45aSNate Lawson if (sc->cpu_cx_states[i].trans_lat <= sc->cpu_prev_sleep) { 921a2afe45aSNate Lawson cx_next_idx = i; 922a2afe45aSNate Lawson break; 923a2afe45aSNate Lawson } 92480f006a1SNate Lawson } 92556a70eadSNate Lawson 9266b74f9b7SNate Lawson /* 9276b74f9b7SNate Lawson * Check for bus master activity. If there was activity, clear 9286b74f9b7SNate Lawson * the bit and use the lowest non-C3 state. Note that the USB 9296b74f9b7SNate Lawson * driver polling for new devices keeps this bit set all the 930f435261dSNate Lawson * time if USB is loaded. 9316b74f9b7SNate Lawson */ 93218ececa0SNate Lawson if ((cpu_quirks & CPU_QUIRK_NO_BM_CTRL) == 0) { 9332be4e471SJung-uk Kim AcpiGetRegister(ACPI_BITREG_BUS_MASTER_STATUS, &bm_active); 9346b74f9b7SNate Lawson if (bm_active != 0) { 9352be4e471SJung-uk Kim AcpiSetRegister(ACPI_BITREG_BUS_MASTER_STATUS, 1); 936907b6777SNate Lawson cx_next_idx = min(cx_next_idx, sc->cpu_non_c3); 9376b74f9b7SNate Lawson } 938f435261dSNate Lawson } 9396b74f9b7SNate Lawson 940a2afe45aSNate Lawson /* Select the next state and update statistics. */ 941a2afe45aSNate Lawson cx_next = &sc->cpu_cx_states[cx_next_idx]; 942907b6777SNate Lawson sc->cpu_cx_stats[cx_next_idx]++; 943a2afe45aSNate Lawson KASSERT(cx_next->type != ACPI_STATE_C0, ("acpi_cpu_idle: C0 sleep")); 9446b74f9b7SNate Lawson 9456b74f9b7SNate Lawson /* 946a2afe45aSNate Lawson * Execute HLT (or equivalent) and wait for an interrupt. We can't 947a2afe45aSNate Lawson * calculate the time spent in C1 since the place we wake up is an 948a2afe45aSNate Lawson * ISR. Assume we slept one quantum and return. 9496b74f9b7SNate Lawson */ 950a2afe45aSNate Lawson if (cx_next->type == ACPI_STATE_C1) { 951a2afe45aSNate Lawson sc->cpu_prev_sleep = 1000000 / hz; 952a2afe45aSNate Lawson acpi_cpu_c1(); 953a2afe45aSNate Lawson return; 954a2afe45aSNate Lawson } 955a2afe45aSNate Lawson 956f435261dSNate Lawson /* 957f435261dSNate Lawson * For C3, disable bus master arbitration and enable bus master wake 958f435261dSNate Lawson * if BM control is available, otherwise flush the CPU cache. 959f435261dSNate Lawson */ 960a2afe45aSNate Lawson if (cx_next->type == ACPI_STATE_C3) { 961f435261dSNate Lawson if ((cpu_quirks & CPU_QUIRK_NO_BM_CTRL) == 0) { 9622be4e471SJung-uk Kim AcpiSetRegister(ACPI_BITREG_ARB_DISABLE, 1); 9632be4e471SJung-uk Kim AcpiSetRegister(ACPI_BITREG_BUS_MASTER_RLD, 1); 964f435261dSNate Lawson } else 965f435261dSNate Lawson ACPI_FLUSH_CPU_CACHE(); 966a2afe45aSNate Lawson } 967a2afe45aSNate Lawson 9686b74f9b7SNate Lawson /* 969a2afe45aSNate Lawson * Read from P_LVLx to enter C2(+), checking time spent asleep. 9706b74f9b7SNate Lawson * Use the ACPI timer for measuring sleep time. Since we need to 9716b74f9b7SNate Lawson * get the time very close to the CPU start/stop clock logic, this 9726b74f9b7SNate Lawson * is the only reliable time source. 9736b74f9b7SNate Lawson */ 9742be4e471SJung-uk Kim AcpiHwLowLevelRead(32, &start_time, &AcpiGbl_FADT.XPmTimerBlock); 9756b74f9b7SNate Lawson CPU_GET_REG(cx_next->p_lvlx, 1); 9766b74f9b7SNate Lawson 9776b74f9b7SNate Lawson /* 9786b74f9b7SNate Lawson * Read the end time twice. Since it may take an arbitrary time 9796b74f9b7SNate Lawson * to enter the idle state, the first read may be executed before 9806b74f9b7SNate Lawson * the processor has stopped. Doing it again provides enough 9816b74f9b7SNate Lawson * margin that we are certain to have a correct value. 9826b74f9b7SNate Lawson */ 9832be4e471SJung-uk Kim AcpiHwLowLevelRead(32, &end_time, &AcpiGbl_FADT.XPmTimerBlock); 9842be4e471SJung-uk Kim AcpiHwLowLevelRead(32, &end_time, &AcpiGbl_FADT.XPmTimerBlock); 9856b74f9b7SNate Lawson 9866b74f9b7SNate Lawson /* Enable bus master arbitration and disable bus master wakeup. */ 98718ececa0SNate Lawson if (cx_next->type == ACPI_STATE_C3 && 98818ececa0SNate Lawson (cpu_quirks & CPU_QUIRK_NO_BM_CTRL) == 0) { 9892be4e471SJung-uk Kim AcpiSetRegister(ACPI_BITREG_ARB_DISABLE, 0); 9902be4e471SJung-uk Kim AcpiSetRegister(ACPI_BITREG_BUS_MASTER_RLD, 0); 9916b74f9b7SNate Lawson } 99280f006a1SNate Lawson ACPI_ENABLE_IRQS(); 9936b74f9b7SNate Lawson 9946b74f9b7SNate Lawson /* Find the actual time asleep in microseconds, minus overhead. */ 995eea17c34SNate Lawson end_time = acpi_TimerDelta(end_time, start_time); 996a2afe45aSNate Lawson sc->cpu_prev_sleep = PM_USEC(end_time) - cx_next->trans_lat; 9976b74f9b7SNate Lawson } 9986b74f9b7SNate Lawson 9996b74f9b7SNate Lawson /* 10008b888c66SNate Lawson * Re-evaluate the _CST object when we are notified that it changed. 100156a70eadSNate Lawson * 10026b74f9b7SNate Lawson * XXX Re-evaluation disabled until locking is done. 10036b74f9b7SNate Lawson */ 10046b74f9b7SNate Lawson static void 10056b74f9b7SNate Lawson acpi_cpu_notify(ACPI_HANDLE h, UINT32 notify, void *context) 10066b74f9b7SNate Lawson { 10076b74f9b7SNate Lawson struct acpi_cpu_softc *sc = (struct acpi_cpu_softc *)context; 100889ab2a7aSRui Paulo struct acpi_cpu_softc *isc; 100989ab2a7aSRui Paulo int i; 10106b74f9b7SNate Lawson 10118b888c66SNate Lawson if (notify != ACPI_NOTIFY_CX_STATES) 10128b888c66SNate Lawson return; 10138b888c66SNate Lawson 101489ab2a7aSRui Paulo /* Update the list of Cx states. */ 101589ab2a7aSRui Paulo acpi_cpu_cx_cst(sc); 101689ab2a7aSRui Paulo acpi_cpu_cx_list(sc); 101789ab2a7aSRui Paulo 101889ab2a7aSRui Paulo /* Update the new lowest useable Cx state for all CPUs. */ 101989ab2a7aSRui Paulo ACPI_SERIAL_BEGIN(cpu); 102089ab2a7aSRui Paulo cpu_cx_count = 0; 102189ab2a7aSRui Paulo for (i = 0; i < cpu_ndevices; i++) { 102289ab2a7aSRui Paulo isc = device_get_softc(cpu_devices[i]); 102389ab2a7aSRui Paulo if (isc->cpu_cx_count > cpu_cx_count) 102489ab2a7aSRui Paulo cpu_cx_count = isc->cpu_cx_count; 102589ab2a7aSRui Paulo } 102689ab2a7aSRui Paulo ACPI_SERIAL_END(cpu); 10276b74f9b7SNate Lawson } 10286b74f9b7SNate Lawson 10296b74f9b7SNate Lawson static int 1030907b6777SNate Lawson acpi_cpu_quirks(void) 10316b74f9b7SNate Lawson { 1032ae56b59fSNate Lawson device_t acpi_dev; 10338a000acaSRui Paulo uint32_t val; 10346b74f9b7SNate Lawson 10357826bf98SNate Lawson ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 10367826bf98SNate Lawson 10376b74f9b7SNate Lawson /* 1038907b6777SNate Lawson * Bus mastering arbitration control is needed to keep caches coherent 1039907b6777SNate Lawson * while sleeping in C3. If it's not present but a working flush cache 1040907b6777SNate Lawson * instruction is present, flush the caches before entering C3 instead. 1041907b6777SNate Lawson * Otherwise, just disable C3 completely. 10426b74f9b7SNate Lawson */ 10432be4e471SJung-uk Kim if (AcpiGbl_FADT.Pm2ControlBlock == 0 || 10442be4e471SJung-uk Kim AcpiGbl_FADT.Pm2ControlLength == 0) { 10452be4e471SJung-uk Kim if ((AcpiGbl_FADT.Flags & ACPI_FADT_WBINVD) && 10462be4e471SJung-uk Kim (AcpiGbl_FADT.Flags & ACPI_FADT_WBINVD_FLUSH) == 0) { 1047907b6777SNate Lawson cpu_quirks |= CPU_QUIRK_NO_BM_CTRL; 1048907b6777SNate Lawson ACPI_DEBUG_PRINT((ACPI_DB_INFO, 104930dd6af3SNate Lawson "acpi_cpu: no BM control, using flush cache method\n")); 1050907b6777SNate Lawson } else { 1051907b6777SNate Lawson cpu_quirks |= CPU_QUIRK_NO_C3; 1052907b6777SNate Lawson ACPI_DEBUG_PRINT((ACPI_DB_INFO, 105330dd6af3SNate Lawson "acpi_cpu: no BM control, C3 not available\n")); 1054907b6777SNate Lawson } 1055907b6777SNate Lawson } 1056907b6777SNate Lawson 1057907b6777SNate Lawson /* 1058907b6777SNate Lawson * If we are using generic Cx mode, C3 on multiple CPUs requires using 1059907b6777SNate Lawson * the expensive flush cache instruction. 1060907b6777SNate Lawson */ 106130dd6af3SNate Lawson if (cpu_cx_generic && mp_ncpus > 1) { 106218ececa0SNate Lawson cpu_quirks |= CPU_QUIRK_NO_BM_CTRL; 106330dd6af3SNate Lawson ACPI_DEBUG_PRINT((ACPI_DB_INFO, 106430dd6af3SNate Lawson "acpi_cpu: SMP, using flush cache mode for C3\n")); 106530dd6af3SNate Lawson } 10666b74f9b7SNate Lawson 10676b74f9b7SNate Lawson /* Look for various quirks of the PIIX4 part. */ 10686b74f9b7SNate Lawson acpi_dev = pci_find_device(PCI_VENDOR_INTEL, PCI_DEVICE_82371AB_3); 10696b74f9b7SNate Lawson if (acpi_dev != NULL) { 10706b74f9b7SNate Lawson switch (pci_get_revid(acpi_dev)) { 10716b74f9b7SNate Lawson /* 10726b74f9b7SNate Lawson * Disable C3 support for all PIIX4 chipsets. Some of these parts 10736b74f9b7SNate Lawson * do not report the BMIDE status to the BM status register and 10746b74f9b7SNate Lawson * others have a livelock bug if Type-F DMA is enabled. Linux 10756b74f9b7SNate Lawson * works around the BMIDE bug by reading the BM status directly 10766b74f9b7SNate Lawson * but we take the simpler approach of disabling C3 for these 10776b74f9b7SNate Lawson * parts. 10786b74f9b7SNate Lawson * 10796b74f9b7SNate Lawson * See erratum #18 ("C3 Power State/BMIDE and Type-F DMA 10806b74f9b7SNate Lawson * Livelock") from the January 2002 PIIX4 specification update. 10816b74f9b7SNate Lawson * Applies to all PIIX4 models. 10828a000acaSRui Paulo * 10838a000acaSRui Paulo * Also, make sure that all interrupts cause a "Stop Break" 10848a000acaSRui Paulo * event to exit from C2 state. 10856b74f9b7SNate Lawson */ 10868a000acaSRui Paulo case PCI_REVISION_A_STEP: 10878a000acaSRui Paulo case PCI_REVISION_B_STEP: 10886b74f9b7SNate Lawson case PCI_REVISION_4E: 10896b74f9b7SNate Lawson case PCI_REVISION_4M: 10906b74f9b7SNate Lawson cpu_quirks |= CPU_QUIRK_NO_C3; 109130dd6af3SNate Lawson ACPI_DEBUG_PRINT((ACPI_DB_INFO, 109230dd6af3SNate Lawson "acpi_cpu: working around PIIX4 bug, disabling C3\n")); 10938a000acaSRui Paulo 10948a000acaSRui Paulo val = pci_read_config(acpi_dev, PIIX4_DEVACTB_REG, 4); 10958a000acaSRui Paulo if ((val & PIIX4_STOP_BREAK_MASK) != PIIX4_STOP_BREAK_MASK) { 10968a000acaSRui Paulo ACPI_DEBUG_PRINT((ACPI_DB_INFO, 10978a000acaSRui Paulo "PIIX4: enabling IRQs to generate Stop Break\n")); 10988a000acaSRui Paulo val |= PIIX4_STOP_BREAK_MASK; 10998a000acaSRui Paulo pci_write_config(acpi_dev, PIIX4_DEVACTB_REG, val, 4); 11008a000acaSRui Paulo } 11016b74f9b7SNate Lawson break; 11026b74f9b7SNate Lawson default: 11036b74f9b7SNate Lawson break; 11046b74f9b7SNate Lawson } 11056b74f9b7SNate Lawson } 11066b74f9b7SNate Lawson 11076b74f9b7SNate Lawson return (0); 11086b74f9b7SNate Lawson } 11096b74f9b7SNate Lawson 11106b74f9b7SNate Lawson static int 1111a2afe45aSNate Lawson acpi_cpu_usage_sysctl(SYSCTL_HANDLER_ARGS) 11126b74f9b7SNate Lawson { 1113907b6777SNate Lawson struct acpi_cpu_softc *sc; 11146b74f9b7SNate Lawson struct sbuf sb; 11156b74f9b7SNate Lawson char buf[128]; 11166b74f9b7SNate Lawson int i; 11174a03551dSNate Lawson uintmax_t fract, sum, whole; 11186b74f9b7SNate Lawson 1119907b6777SNate Lawson sc = (struct acpi_cpu_softc *) arg1; 11203e7fa136SNate Lawson sum = 0; 1121907b6777SNate Lawson for (i = 0; i < sc->cpu_cx_count; i++) 1122907b6777SNate Lawson sum += sc->cpu_cx_stats[i]; 11236b74f9b7SNate Lawson sbuf_new(&sb, buf, sizeof(buf), SBUF_FIXEDLEN); 1124907b6777SNate Lawson for (i = 0; i < sc->cpu_cx_count; i++) { 11253e7fa136SNate Lawson if (sum > 0) { 1126907b6777SNate Lawson whole = (uintmax_t)sc->cpu_cx_stats[i] * 100; 11273e7fa136SNate Lawson fract = (whole % sum) * 100; 11283e7fa136SNate Lawson sbuf_printf(&sb, "%u.%02u%% ", (u_int)(whole / sum), 11293e7fa136SNate Lawson (u_int)(fract / sum)); 11303e7fa136SNate Lawson } else 11313e7fa136SNate Lawson sbuf_printf(&sb, "0%% "); 11323e7fa136SNate Lawson } 11336b74f9b7SNate Lawson sbuf_trim(&sb); 11346b74f9b7SNate Lawson sbuf_finish(&sb); 1135ccc09458SNate Lawson sysctl_handle_string(oidp, sbuf_data(&sb), sbuf_len(&sb), req); 1136ccc09458SNate Lawson sbuf_delete(&sb); 11376b74f9b7SNate Lawson 11386b74f9b7SNate Lawson return (0); 11396b74f9b7SNate Lawson } 11406b74f9b7SNate Lawson 11416b74f9b7SNate Lawson static int 1142b13cf774SNate Lawson acpi_cpu_set_cx_lowest(struct acpi_cpu_softc *sc, int val) 11436b74f9b7SNate Lawson { 1144b13cf774SNate Lawson int i; 11456b74f9b7SNate Lawson 1146b13cf774SNate Lawson ACPI_SERIAL_ASSERT(cpu); 1147907b6777SNate Lawson sc->cpu_cx_lowest = val; 1148907b6777SNate Lawson 1149907b6777SNate Lawson /* If not disabling, cache the new lowest non-C3 state. */ 1150907b6777SNate Lawson sc->cpu_non_c3 = 0; 1151907b6777SNate Lawson for (i = sc->cpu_cx_lowest; i >= 0; i--) { 1152907b6777SNate Lawson if (sc->cpu_cx_states[i].type < ACPI_STATE_C3) { 1153907b6777SNate Lawson sc->cpu_non_c3 = i; 1154907b6777SNate Lawson break; 1155907b6777SNate Lawson } 1156907b6777SNate Lawson } 1157907b6777SNate Lawson 1158907b6777SNate Lawson /* Reset the statistics counters. */ 1159907b6777SNate Lawson bzero(sc->cpu_cx_stats, sizeof(sc->cpu_cx_stats)); 1160b13cf774SNate Lawson return (0); 1161b13cf774SNate Lawson } 1162b13cf774SNate Lawson 1163b13cf774SNate Lawson static int 1164b13cf774SNate Lawson acpi_cpu_cx_lowest_sysctl(SYSCTL_HANDLER_ARGS) 1165b13cf774SNate Lawson { 1166b13cf774SNate Lawson struct acpi_cpu_softc *sc; 1167b13cf774SNate Lawson char state[8]; 1168b13cf774SNate Lawson int val, error; 1169b13cf774SNate Lawson 1170b13cf774SNate Lawson sc = (struct acpi_cpu_softc *) arg1; 1171b13cf774SNate Lawson snprintf(state, sizeof(state), "C%d", sc->cpu_cx_lowest + 1); 1172b13cf774SNate Lawson error = sysctl_handle_string(oidp, state, sizeof(state), req); 1173b13cf774SNate Lawson if (error != 0 || req->newptr == NULL) 1174b13cf774SNate Lawson return (error); 1175b13cf774SNate Lawson if (strlen(state) < 2 || toupper(state[0]) != 'C') 1176b13cf774SNate Lawson return (EINVAL); 1177b13cf774SNate Lawson val = (int) strtol(state + 1, NULL, 10) - 1; 1178b13cf774SNate Lawson if (val < 0 || val > sc->cpu_cx_count - 1) 1179b13cf774SNate Lawson return (EINVAL); 1180b13cf774SNate Lawson 1181b13cf774SNate Lawson ACPI_SERIAL_BEGIN(cpu); 1182b13cf774SNate Lawson acpi_cpu_set_cx_lowest(sc, val); 1183907b6777SNate Lawson ACPI_SERIAL_END(cpu); 1184907b6777SNate Lawson 1185907b6777SNate Lawson return (0); 1186907b6777SNate Lawson } 1187907b6777SNate Lawson 1188907b6777SNate Lawson static int 1189907b6777SNate Lawson acpi_cpu_global_cx_lowest_sysctl(SYSCTL_HANDLER_ARGS) 1190907b6777SNate Lawson { 1191907b6777SNate Lawson struct acpi_cpu_softc *sc; 1192907b6777SNate Lawson char state[8]; 1193b13cf774SNate Lawson int val, error, i; 1194907b6777SNate Lawson 1195ccc09458SNate Lawson snprintf(state, sizeof(state), "C%d", cpu_cx_lowest + 1); 1196ccc09458SNate Lawson error = sysctl_handle_string(oidp, state, sizeof(state), req); 11976b74f9b7SNate Lawson if (error != 0 || req->newptr == NULL) 11986b74f9b7SNate Lawson return (error); 1199ccc09458SNate Lawson if (strlen(state) < 2 || toupper(state[0]) != 'C') 1200ccc09458SNate Lawson return (EINVAL); 1201ccc09458SNate Lawson val = (int) strtol(state + 1, NULL, 10) - 1; 120256a70eadSNate Lawson if (val < 0 || val > cpu_cx_count - 1) 12036b74f9b7SNate Lawson return (EINVAL); 12046b74f9b7SNate Lawson cpu_cx_lowest = val; 12056b74f9b7SNate Lawson 1206b13cf774SNate Lawson /* Update the new lowest useable Cx state for all CPUs. */ 1207907b6777SNate Lawson ACPI_SERIAL_BEGIN(cpu); 1208907b6777SNate Lawson for (i = 0; i < cpu_ndevices; i++) { 1209907b6777SNate Lawson sc = device_get_softc(cpu_devices[i]); 1210b13cf774SNate Lawson acpi_cpu_set_cx_lowest(sc, val); 1211907b6777SNate Lawson } 1212d92a2ebdSNate Lawson ACPI_SERIAL_END(cpu); 12136b74f9b7SNate Lawson 12146b74f9b7SNate Lawson return (0); 12156b74f9b7SNate Lawson } 1216