1fec754d4SMike Smith /*- 256a70eadSNate Lawson * Copyright (c) 2003 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> 3456a70eadSNate Lawson #include <sys/kernel.h> 35447a5fa1SJohn Baldwin #include <sys/malloc.h> 366b74f9b7SNate Lawson #include <sys/pcpu.h> 3756a70eadSNate Lawson #include <sys/power.h> 3856a70eadSNate Lawson #include <sys/proc.h> 3956a70eadSNate Lawson #include <sys/sbuf.h> 406b74f9b7SNate Lawson #include <sys/smp.h> 41fec754d4SMike Smith 426b74f9b7SNate Lawson #include <dev/pci/pcivar.h> 4356a70eadSNate Lawson #include <machine/atomic.h> 44fec754d4SMike Smith #include <machine/bus.h> 456b74f9b7SNate Lawson #ifdef __ia64__ 466b74f9b7SNate Lawson #include <machine/pal.h> 476b74f9b7SNate Lawson #endif 4856a70eadSNate Lawson #include <sys/rman.h> 49fec754d4SMike Smith 50fec754d4SMike Smith #include "acpi.h" 51fec754d4SMike Smith #include <dev/acpica/acpivar.h> 52fec754d4SMike Smith 53fec754d4SMike Smith /* 546b74f9b7SNate Lawson * Support for ACPI Processor devices, including ACPI 2.0 throttling 556b74f9b7SNate Lawson * and C[1-3] sleep states. 56fec754d4SMike Smith * 576b74f9b7SNate Lawson * TODO: implement scans of all CPUs to be sure all Cx states are 586b74f9b7SNate Lawson * equivalent. 59fec754d4SMike Smith */ 60fec754d4SMike Smith 61be2b1797SNate Lawson /* Hooks for the ACPI CA debugging infrastructure */ 62fec754d4SMike Smith #define _COMPONENT ACPI_PROCESSOR 639127281cSMike Smith ACPI_MODULE_NAME("PROCESSOR") 64fec754d4SMike Smith 656b74f9b7SNate Lawson struct acpi_cx { 666b74f9b7SNate Lawson struct resource *p_lvlx; /* Register to read to enter state. */ 676b74f9b7SNate Lawson uint32_t type; /* C1-3 (C4 and up treated as C3). */ 686b74f9b7SNate Lawson uint32_t trans_lat; /* Transition latency (usec). */ 696b74f9b7SNate Lawson uint32_t power; /* Power consumed (mW). */ 706b74f9b7SNate Lawson }; 716b74f9b7SNate Lawson #define MAX_CX_STATES 8 726b74f9b7SNate Lawson 736b74f9b7SNate Lawson struct acpi_cx_stats { 746b74f9b7SNate Lawson int long_slp; /* Count of sleeps >= trans_lat. */ 756b74f9b7SNate Lawson int short_slp; /* Count of sleeps < trans_lat. */ 766b74f9b7SNate Lawson }; 776b74f9b7SNate Lawson 78fec754d4SMike Smith struct acpi_cpu_softc { 79fec754d4SMike Smith device_t cpu_dev; 80fec754d4SMike Smith ACPI_HANDLE cpu_handle; 81b6426963SNate Lawson uint32_t acpi_id; /* ACPI processor id */ 8256a70eadSNate Lawson uint32_t cpu_p_blk; /* ACPI P_BLK location */ 8356a70eadSNate Lawson uint32_t cpu_p_blk_len; /* P_BLK length (must be 6). */ 846b74f9b7SNate Lawson struct resource *cpu_p_cnt; /* Throttling control register */ 856b74f9b7SNate Lawson struct acpi_cx cpu_cx_states[MAX_CX_STATES]; 8656a70eadSNate Lawson int cpu_cx_count; /* Number of valid Cx states. */ 87fec754d4SMike Smith }; 88fec754d4SMike Smith 896b74f9b7SNate Lawson #define CPU_GET_REG(reg, width) \ 906b74f9b7SNate Lawson (bus_space_read_ ## width(rman_get_bustag((reg)), \ 916b74f9b7SNate Lawson rman_get_bushandle((reg)), 0)) 926b74f9b7SNate Lawson #define CPU_SET_REG(reg, width, val) \ 936b74f9b7SNate Lawson (bus_space_write_ ## width(rman_get_bustag((reg)), \ 946b74f9b7SNate Lawson rman_get_bushandle((reg)), 0, (val))) 95be2b1797SNate Lawson 96fec754d4SMike Smith /* 97b279c35aSNate Lawson * Speeds are stored in counts, from 1 to CPU_MAX_SPEED, and 98fec754d4SMike Smith * reported to the user in tenths of a percent. 99fec754d4SMike Smith */ 1006b74f9b7SNate Lawson static uint32_t cpu_duty_offset; 1016b74f9b7SNate Lawson static uint32_t cpu_duty_width; 102fec754d4SMike Smith #define CPU_MAX_SPEED (1 << cpu_duty_width) 103fec754d4SMike Smith #define CPU_SPEED_PERCENT(x) ((1000 * (x)) / CPU_MAX_SPEED) 1046b74f9b7SNate Lawson #define CPU_SPEED_PRINTABLE(x) (CPU_SPEED_PERCENT(x) / 10), \ 1056b74f9b7SNate Lawson (CPU_SPEED_PERCENT(x) % 10) 1066b74f9b7SNate Lawson #define CPU_P_CNT_THT_EN (1<<4) 1076b74f9b7SNate Lawson #define PM_USEC(x) ((x) >> 2) /* ~4 clocks per usec (3.57955 Mhz) */ 108fec754d4SMike Smith 1096b74f9b7SNate Lawson #define ACPI_CPU_NOTIFY_PERF_STATES 0x80 /* _PSS changed. */ 1106b74f9b7SNate Lawson #define ACPI_CPU_NOTIFY_CX_STATES 0x81 /* _CST changed. */ 111fec754d4SMike Smith 1126b74f9b7SNate Lawson #define CPU_QUIRK_NO_C3 0x0001 /* C3-type states are not usable. */ 1136b74f9b7SNate Lawson #define CPU_QUIRK_NO_THROTTLE 0x0002 /* Throttling is not usable. */ 1146b74f9b7SNate Lawson 1156b74f9b7SNate Lawson #define PCI_VENDOR_INTEL 0x8086 1166b74f9b7SNate Lawson #define PCI_DEVICE_82371AB_3 0x7113 /* PIIX4 chipset for quirks. */ 1176b74f9b7SNate Lawson #define PCI_REVISION_A_STEP 0 1186b74f9b7SNate Lawson #define PCI_REVISION_B_STEP 1 1196b74f9b7SNate Lawson #define PCI_REVISION_4E 2 1206b74f9b7SNate Lawson #define PCI_REVISION_4M 3 1216b74f9b7SNate Lawson 1226b74f9b7SNate Lawson /* Platform hardware resource information. */ 1236b74f9b7SNate Lawson static uint32_t cpu_smi_cmd; /* Value to write to SMI_CMD. */ 1246b74f9b7SNate Lawson static uint8_t cpu_pstate_cnt;/* Register to take over throttling. */ 12556a70eadSNate Lawson static uint8_t cpu_cst_cnt; /* Indicate we are _CST aware. */ 1266b74f9b7SNate Lawson static uint32_t cpu_rid; /* Driver-wide resource id. */ 1276b74f9b7SNate Lawson static uint32_t cpu_quirks; /* Indicate any hardware bugs. */ 1286b74f9b7SNate Lawson 1296b74f9b7SNate Lawson /* Runtime state. */ 1306b74f9b7SNate Lawson static int cpu_cx_count; /* Number of valid states */ 1316b74f9b7SNate Lawson static uint32_t cpu_cx_next; /* State to use for next sleep. */ 1326b74f9b7SNate Lawson static uint32_t cpu_non_c3; /* Index of lowest non-C3 state. */ 1336b74f9b7SNate Lawson static struct acpi_cx_stats cpu_cx_stats[MAX_CX_STATES]; 13456a70eadSNate Lawson static int cpu_idle_busy; /* Count of CPUs in acpi_cpu_idle. */ 1356b74f9b7SNate Lawson 1366b74f9b7SNate Lawson /* Values for sysctl. */ 1370d8fb61aSNate Lawson static uint32_t cpu_throttle_state; 1380d8fb61aSNate Lawson static uint32_t cpu_throttle_max; 1396b74f9b7SNate Lawson static int cpu_cx_lowest; 1406b74f9b7SNate Lawson static char cpu_cx_supported[64]; 141fec754d4SMike Smith 142fec754d4SMike Smith static device_t *cpu_devices; 143fec754d4SMike Smith static int cpu_ndevices; 144447a5fa1SJohn Baldwin static struct acpi_cpu_softc **cpu_softc; 145fec754d4SMike Smith 146fec754d4SMike Smith static struct sysctl_ctx_list acpi_cpu_sysctl_ctx; 147fec754d4SMike Smith static struct sysctl_oid *acpi_cpu_sysctl_tree; 148fec754d4SMike Smith 149fec754d4SMike Smith static int acpi_cpu_probe(device_t dev); 150fec754d4SMike Smith static int acpi_cpu_attach(device_t dev); 151b6426963SNate Lawson static int acpi_pcpu_get_id(uint32_t idx, uint32_t *acpi_id, 152b6426963SNate Lawson uint32_t *cpu_id); 15356a70eadSNate Lawson static int acpi_cpu_shutdown(device_t dev); 1546b74f9b7SNate Lawson static int acpi_cpu_throttle_probe(struct acpi_cpu_softc *sc); 1556b74f9b7SNate Lawson static int acpi_cpu_cx_probe(struct acpi_cpu_softc *sc); 1566b74f9b7SNate Lawson static int acpi_cpu_cx_cst(struct acpi_cpu_softc *sc); 1576b74f9b7SNate Lawson static void acpi_cpu_startup(void *arg); 1586b74f9b7SNate Lawson static void acpi_cpu_startup_throttling(void); 15956a70eadSNate Lawson static void acpi_cpu_startup_cx(void); 1606b74f9b7SNate Lawson static void acpi_cpu_throttle_set(uint32_t speed); 1616b74f9b7SNate Lawson static void acpi_cpu_idle(void); 1626b74f9b7SNate Lawson static void acpi_cpu_c1(void); 1636b74f9b7SNate Lawson static void acpi_cpu_notify(ACPI_HANDLE h, UINT32 notify, void *context); 1646b74f9b7SNate Lawson static int acpi_cpu_quirks(struct acpi_cpu_softc *sc); 1656b74f9b7SNate Lawson static int acpi_cpu_throttle_sysctl(SYSCTL_HANDLER_ARGS); 1666b74f9b7SNate Lawson static int acpi_cpu_history_sysctl(SYSCTL_HANDLER_ARGS); 1676b74f9b7SNate Lawson static int acpi_cpu_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), 17356a70eadSNate Lawson DEVMETHOD(device_shutdown, acpi_cpu_shutdown), 174fec754d4SMike Smith 175fec754d4SMike Smith {0, 0} 176fec754d4SMike Smith }; 177fec754d4SMike Smith 178fec754d4SMike Smith static driver_t acpi_cpu_driver = { 179b0e2b625SNate Lawson "cpu", 180fec754d4SMike Smith acpi_cpu_methods, 181fec754d4SMike Smith sizeof(struct acpi_cpu_softc), 182fec754d4SMike Smith }; 183fec754d4SMike Smith 1843273b005SMike Smith static devclass_t acpi_cpu_devclass; 185b0e2b625SNate Lawson DRIVER_MODULE(cpu, acpi, acpi_cpu_driver, acpi_cpu_devclass, 0, 0); 186b0e2b625SNate Lawson MODULE_DEPEND(cpu, acpi, 1, 1, 1); 18756a70eadSNate Lawson 188fec754d4SMike Smith static int 189fec754d4SMike Smith acpi_cpu_probe(device_t dev) 190fec754d4SMike Smith { 191b0e2b625SNate Lawson int acpi_id, cpu_id, cx_count; 192b0e2b625SNate Lawson ACPI_BUFFER buf; 193b0e2b625SNate Lawson ACPI_HANDLE handle; 194b0e2b625SNate Lawson char msg[32]; 195b0e2b625SNate Lawson ACPI_OBJECT *obj; 196b0e2b625SNate Lawson ACPI_STATUS status; 197b0e2b625SNate Lawson 198b0e2b625SNate Lawson if (acpi_disabled("cpu") || acpi_get_type(dev) != ACPI_TYPE_PROCESSOR) 199b0e2b625SNate Lawson return (ENXIO); 200b0e2b625SNate Lawson 201b0e2b625SNate Lawson handle = acpi_get_handle(dev); 202447a5fa1SJohn Baldwin if (cpu_softc == NULL) 203447a5fa1SJohn Baldwin cpu_softc = malloc(sizeof(struct acpi_cpu_softc *) * 204447a5fa1SJohn Baldwin (mp_maxid + 1), M_TEMP /* XXX */, M_WAITOK | M_ZERO); 205b0e2b625SNate Lawson 206b0e2b625SNate Lawson /* Get our Processor object. */ 207b0e2b625SNate Lawson buf.Pointer = NULL; 208b0e2b625SNate Lawson buf.Length = ACPI_ALLOCATE_BUFFER; 209b0e2b625SNate Lawson status = AcpiEvaluateObject(handle, NULL, NULL, &buf); 210b0e2b625SNate Lawson if (ACPI_FAILURE(status)) { 211b0e2b625SNate Lawson device_printf(dev, "probe failed to get Processor obj - %s\n", 212b0e2b625SNate Lawson AcpiFormatException(status)); 213b0e2b625SNate Lawson return (ENXIO); 214b0e2b625SNate Lawson } 215b0e2b625SNate Lawson obj = (ACPI_OBJECT *)buf.Pointer; 216b0e2b625SNate Lawson if (obj->Type != ACPI_TYPE_PROCESSOR) { 217b0e2b625SNate Lawson device_printf(dev, "Processor object has bad type %d\n", obj->Type); 218b0e2b625SNate Lawson AcpiOsFree(obj); 219b0e2b625SNate Lawson return (ENXIO); 220fec754d4SMike Smith } 221be2b1797SNate Lawson 222b0e2b625SNate Lawson /* 223b0e2b625SNate Lawson * Find the processor associated with our unit. We could use the 224b0e2b625SNate Lawson * ProcId as a key, however, some boxes do not have the same values 225b0e2b625SNate Lawson * in their Processor object as the ProcId values in the MADT. 226b0e2b625SNate Lawson */ 227b0e2b625SNate Lawson acpi_id = obj->Processor.ProcId; 228b0e2b625SNate Lawson AcpiOsFree(obj); 229b0e2b625SNate Lawson if (acpi_pcpu_get_id(device_get_unit(dev), &acpi_id, &cpu_id) != 0) 230fec754d4SMike Smith return (ENXIO); 231b0e2b625SNate Lawson 232b0e2b625SNate Lawson /* 233b0e2b625SNate Lawson * Check if we already probed this processor. We scan the bus twice 234b0e2b625SNate Lawson * so it's possible we've already seen this one. 235b0e2b625SNate Lawson */ 236b0e2b625SNate Lawson if (cpu_softc[cpu_id] != NULL) 237b0e2b625SNate Lawson return (ENXIO); 238b0e2b625SNate Lawson 239b0e2b625SNate Lawson /* Get a count of Cx states for our device string. */ 240b0e2b625SNate Lawson cx_count = 0; 241b0e2b625SNate Lawson buf.Pointer = NULL; 242b0e2b625SNate Lawson buf.Length = ACPI_ALLOCATE_BUFFER; 243b0e2b625SNate Lawson status = AcpiEvaluateObject(handle, "_CST", NULL, &buf); 244b0e2b625SNate Lawson if (ACPI_SUCCESS(status)) { 245b0e2b625SNate Lawson obj = (ACPI_OBJECT *)buf.Pointer; 246b0e2b625SNate Lawson if (ACPI_PKG_VALID(obj, 2)) 247b0e2b625SNate Lawson acpi_PkgInt32(obj, 0, &cx_count); 248b0e2b625SNate Lawson AcpiOsFree(obj); 249b0e2b625SNate Lawson } else { 250b0e2b625SNate Lawson if (AcpiGbl_FADT->Plvl2Lat <= 100) 251b0e2b625SNate Lawson cx_count++; 252b0e2b625SNate Lawson if (AcpiGbl_FADT->Plvl3Lat <= 1000) 253b0e2b625SNate Lawson cx_count++; 254b0e2b625SNate Lawson if (cx_count > 0) 255b0e2b625SNate Lawson cx_count++; 256b0e2b625SNate Lawson } 257b0e2b625SNate Lawson if (cx_count > 0) 258b0e2b625SNate Lawson snprintf(msg, sizeof(msg), "ACPI CPU (%d Cx states)", cx_count); 259b0e2b625SNate Lawson else 260b0e2b625SNate Lawson strlcpy(msg, "ACPI CPU", sizeof(msg)); 261b0e2b625SNate Lawson device_set_desc_copy(dev, msg); 262b0e2b625SNate Lawson 263b0e2b625SNate Lawson /* Mark this processor as in-use and save our derived id for attach. */ 264b0e2b625SNate Lawson cpu_softc[cpu_id] = (void *)1; 265b0e2b625SNate Lawson acpi_set_magic(dev, cpu_id); 266b0e2b625SNate Lawson 267b0e2b625SNate Lawson return (0); 268fec754d4SMike Smith } 269fec754d4SMike Smith 270fec754d4SMike Smith static int 271fec754d4SMike Smith acpi_cpu_attach(device_t dev) 272fec754d4SMike Smith { 273b0e2b625SNate Lawson ACPI_BUFFER buf; 274b0e2b625SNate Lawson ACPI_OBJECT *obj; 275fec754d4SMike Smith struct acpi_cpu_softc *sc; 276fec754d4SMike Smith struct acpi_softc *acpi_sc; 277fec754d4SMike Smith ACPI_STATUS status; 278b0e2b625SNate Lawson int thr_ret, cx_ret; 279fec754d4SMike Smith 280b4a05238SPeter Wemm ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 281fec754d4SMike Smith 282fec754d4SMike Smith ACPI_ASSERTLOCK; 283fec754d4SMike Smith 284fec754d4SMike Smith sc = device_get_softc(dev); 285fec754d4SMike Smith sc->cpu_dev = dev; 286fec754d4SMike Smith sc->cpu_handle = acpi_get_handle(dev); 287b0e2b625SNate Lawson cpu_softc[acpi_get_magic(dev)] = sc; 288fec754d4SMike Smith 289b0e2b625SNate Lawson buf.Pointer = NULL; 290b0e2b625SNate Lawson buf.Length = ACPI_ALLOCATE_BUFFER; 2916b74f9b7SNate Lawson status = AcpiEvaluateObject(sc->cpu_handle, NULL, NULL, &buf); 2926b74f9b7SNate Lawson if (ACPI_FAILURE(status)) { 293b0e2b625SNate Lawson device_printf(dev, "attach failed to get Processor obj - %s\n", 2946b74f9b7SNate Lawson AcpiFormatException(status)); 2956b74f9b7SNate Lawson return (ENXIO); 296b0e2b625SNate Lawson } 297b0e2b625SNate Lawson obj = (ACPI_OBJECT *)buf.Pointer; 298b0e2b625SNate Lawson sc->cpu_p_blk = obj->Processor.PblkAddress; 299b0e2b625SNate Lawson sc->cpu_p_blk_len = obj->Processor.PblkLength; 300b0e2b625SNate Lawson sc->acpi_id = obj->Processor.ProcId; 301b0e2b625SNate Lawson AcpiOsFree(obj); 30256a70eadSNate Lawson ACPI_DEBUG_PRINT((ACPI_DB_INFO, "acpi_cpu%d: P_BLK at %#x/%d\n", 30356a70eadSNate Lawson device_get_unit(dev), sc->cpu_p_blk, sc->cpu_p_blk_len)); 3046b74f9b7SNate Lawson 305fec754d4SMike Smith acpi_sc = acpi_device_get_parent_softc(dev); 306fec754d4SMike Smith sysctl_ctx_init(&acpi_cpu_sysctl_ctx); 307fec754d4SMike Smith acpi_cpu_sysctl_tree = SYSCTL_ADD_NODE(&acpi_cpu_sysctl_ctx, 308fec754d4SMike Smith SYSCTL_CHILDREN(acpi_sc->acpi_sysctl_tree), 309fec754d4SMike Smith OID_AUTO, "cpu", CTLFLAG_RD, 0, ""); 310fec754d4SMike Smith 3116b74f9b7SNate Lawson /* If this is the first device probed, check for quirks. */ 3126b74f9b7SNate Lawson if (device_get_unit(dev) == 0) 3136b74f9b7SNate Lawson acpi_cpu_quirks(sc); 3146b74f9b7SNate Lawson 3156b74f9b7SNate Lawson /* 3166b74f9b7SNate Lawson * Probe for throttling and Cx state support. 3176b74f9b7SNate Lawson * If none of these is present, free up unused resources. 3186b74f9b7SNate Lawson */ 3196b74f9b7SNate Lawson thr_ret = acpi_cpu_throttle_probe(sc); 3206b74f9b7SNate Lawson cx_ret = acpi_cpu_cx_probe(sc); 3216b74f9b7SNate Lawson if (thr_ret == 0 || cx_ret == 0) { 3226b74f9b7SNate Lawson status = AcpiInstallNotifyHandler(sc->cpu_handle, ACPI_DEVICE_NOTIFY, 3236b74f9b7SNate Lawson acpi_cpu_notify, sc); 32456a70eadSNate Lawson if (device_get_unit(dev) == 0) 32556a70eadSNate Lawson AcpiOsQueueForExecution(OSD_PRIORITY_LO, acpi_cpu_startup, NULL); 3266b74f9b7SNate Lawson } else { 3276b74f9b7SNate Lawson sysctl_ctx_free(&acpi_cpu_sysctl_ctx); 3286b74f9b7SNate Lawson } 3296b74f9b7SNate Lawson 3306b74f9b7SNate Lawson return_VALUE (0); 3316b74f9b7SNate Lawson } 3326b74f9b7SNate Lawson 333b6426963SNate Lawson /* 334b6426963SNate Lawson * Find the nth present CPU and return its pc_cpuid as well as set the 335b6426963SNate Lawson * pc_acpi_id from the most reliable source. 336b6426963SNate Lawson */ 337b6426963SNate Lawson static int 338b6426963SNate Lawson acpi_pcpu_get_id(uint32_t idx, uint32_t *acpi_id, uint32_t *cpu_id) 339b6426963SNate Lawson { 340b6426963SNate Lawson struct pcpu *pcpu_data; 341b6426963SNate Lawson uint32_t i; 342b6426963SNate Lawson 343b6426963SNate Lawson KASSERT(acpi_id != NULL, ("Null acpi_id")); 344b6426963SNate Lawson KASSERT(cpu_id != NULL, ("Null cpu_id")); 345447a5fa1SJohn Baldwin for (i = 0; i <= mp_maxid; i++) { 346b6426963SNate Lawson if (CPU_ABSENT(i)) 347b6426963SNate Lawson continue; 348b6426963SNate Lawson pcpu_data = pcpu_find(i); 349b6426963SNate Lawson KASSERT(pcpu_data != NULL, ("no pcpu data for %d", i)); 350b6426963SNate Lawson if (idx-- == 0) { 351b6426963SNate Lawson /* 352b6426963SNate Lawson * If pc_acpi_id was not initialized (e.g., a non-APIC UP box) 353b6426963SNate Lawson * override it with the value from the ASL. Otherwise, if the 354b6426963SNate Lawson * two don't match, prefer the MADT-derived value. Finally, 355b6426963SNate Lawson * return the pc_cpuid to reference this processor. 356b6426963SNate Lawson */ 357b6426963SNate Lawson if (pcpu_data->pc_acpi_id == 0xffffffff) 358b6426963SNate Lawson pcpu_data->pc_acpi_id = *acpi_id; 359b6426963SNate Lawson else if (pcpu_data->pc_acpi_id != *acpi_id) 360b6426963SNate Lawson *acpi_id = pcpu_data->pc_acpi_id; 361b6426963SNate Lawson *cpu_id = pcpu_data->pc_cpuid; 362b6426963SNate Lawson return (0); 363b6426963SNate Lawson } 364b6426963SNate Lawson } 365b6426963SNate Lawson 366b6426963SNate Lawson return (ESRCH); 367b6426963SNate Lawson } 368b6426963SNate Lawson 3696b74f9b7SNate Lawson static int 37056a70eadSNate Lawson acpi_cpu_shutdown(device_t dev) 37156a70eadSNate Lawson { 37256a70eadSNate Lawson ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 37356a70eadSNate Lawson 37456a70eadSNate Lawson /* Disable any entry to the idle function. */ 37556a70eadSNate Lawson cpu_cx_count = 0; 37656a70eadSNate Lawson 37756a70eadSNate Lawson /* Wait for all processors to exit acpi_cpu_idle(). */ 37856a70eadSNate Lawson smp_rendezvous(NULL, NULL, NULL, NULL); 37956a70eadSNate Lawson while (cpu_idle_busy > 0) 38056a70eadSNate Lawson DELAY(1); 38156a70eadSNate Lawson 38256a70eadSNate Lawson return_VALUE (0); 38356a70eadSNate Lawson } 38456a70eadSNate Lawson 38556a70eadSNate Lawson static int 3866b74f9b7SNate Lawson acpi_cpu_throttle_probe(struct acpi_cpu_softc *sc) 3876b74f9b7SNate Lawson { 3886b74f9b7SNate Lawson uint32_t duty_end; 3896b74f9b7SNate Lawson ACPI_BUFFER buf; 3906b74f9b7SNate Lawson ACPI_OBJECT obj; 3916b74f9b7SNate Lawson ACPI_GENERIC_ADDRESS gas; 3926b74f9b7SNate Lawson ACPI_STATUS status; 3936b74f9b7SNate Lawson 3946b74f9b7SNate Lawson ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 3956b74f9b7SNate Lawson 3966b74f9b7SNate Lawson ACPI_ASSERTLOCK; 3976b74f9b7SNate Lawson 3986b74f9b7SNate Lawson /* Get throttling parameters from the FADT. 0 means not supported. */ 39956a70eadSNate Lawson if (device_get_unit(sc->cpu_dev) == 0) { 4006b74f9b7SNate Lawson cpu_smi_cmd = AcpiGbl_FADT->SmiCmd; 4016b74f9b7SNate Lawson cpu_pstate_cnt = AcpiGbl_FADT->PstateCnt; 40256a70eadSNate Lawson cpu_cst_cnt = AcpiGbl_FADT->CstCnt; 4036b74f9b7SNate Lawson cpu_duty_offset = AcpiGbl_FADT->DutyOffset; 4046b74f9b7SNate Lawson cpu_duty_width = AcpiGbl_FADT->DutyWidth; 40556a70eadSNate Lawson } 4066b74f9b7SNate Lawson if (cpu_duty_width == 0 || (cpu_quirks & CPU_QUIRK_NO_THROTTLE) != 0) 4076b74f9b7SNate Lawson return (ENXIO); 4086b74f9b7SNate Lawson 4096b74f9b7SNate Lawson /* Validate the duty offset/width. */ 4106b74f9b7SNate Lawson duty_end = cpu_duty_offset + cpu_duty_width - 1; 4116b74f9b7SNate Lawson if (duty_end > 31) { 4126b74f9b7SNate Lawson device_printf(sc->cpu_dev, "CLK_VAL field overflows P_CNT register\n"); 4136b74f9b7SNate Lawson return (ENXIO); 4146b74f9b7SNate Lawson } 4156b74f9b7SNate Lawson if (cpu_duty_offset <= 4 && duty_end >= 4) { 4166b74f9b7SNate Lawson device_printf(sc->cpu_dev, "CLK_VAL field overlaps THT_EN bit\n"); 4176b74f9b7SNate Lawson return (ENXIO); 4186b74f9b7SNate Lawson } 4196b74f9b7SNate Lawson 4206b74f9b7SNate Lawson /* 4216b74f9b7SNate Lawson * If not present, fall back to using the processor's P_BLK to find 4226b74f9b7SNate Lawson * the P_CNT register. 4236b74f9b7SNate Lawson * 4246b74f9b7SNate Lawson * Note that some systems seem to duplicate the P_BLK pointer 4256b74f9b7SNate Lawson * across multiple CPUs, so not getting the resource is not fatal. 4266b74f9b7SNate Lawson */ 4276b74f9b7SNate Lawson buf.Pointer = &obj; 4286b74f9b7SNate Lawson buf.Length = sizeof(obj); 4296b74f9b7SNate Lawson status = AcpiEvaluateObject(sc->cpu_handle, "_PTC", NULL, &buf); 4306b74f9b7SNate Lawson if (ACPI_SUCCESS(status)) { 4316b74f9b7SNate Lawson if (obj.Buffer.Length < sizeof(ACPI_GENERIC_ADDRESS) + 3) { 4326b74f9b7SNate Lawson device_printf(sc->cpu_dev, "_PTC buffer too small\n"); 4336b74f9b7SNate Lawson return (ENXIO); 4346b74f9b7SNate Lawson } 4356b74f9b7SNate Lawson memcpy(&gas, obj.Buffer.Pointer + 3, sizeof(gas)); 4366b74f9b7SNate Lawson sc->cpu_p_cnt = acpi_bus_alloc_gas(sc->cpu_dev, &cpu_rid, &gas); 4376b74f9b7SNate Lawson if (sc->cpu_p_cnt != NULL) { 43856a70eadSNate Lawson ACPI_DEBUG_PRINT((ACPI_DB_INFO, "acpi_cpu%d: P_CNT from _PTC\n", 4396b74f9b7SNate Lawson device_get_unit(sc->cpu_dev))); 4406b74f9b7SNate Lawson } 4416b74f9b7SNate Lawson } 4426b74f9b7SNate Lawson 4436b74f9b7SNate Lawson /* If _PTC not present or other failure, try the P_BLK. */ 4446b74f9b7SNate Lawson if (sc->cpu_p_cnt == NULL) { 445c181b89bSNate Lawson /* 446c181b89bSNate Lawson * The spec says P_BLK must be 6 bytes long. However, some 447c181b89bSNate Lawson * systems use it to indicate a fractional set of features 448c181b89bSNate Lawson * present so we take anything >= 4. 449c181b89bSNate Lawson */ 450c181b89bSNate Lawson if (sc->cpu_p_blk_len < 4) 4516b74f9b7SNate Lawson return (ENXIO); 45256a70eadSNate Lawson gas.Address = sc->cpu_p_blk; 4536b74f9b7SNate Lawson gas.AddressSpaceId = ACPI_ADR_SPACE_SYSTEM_IO; 4546b74f9b7SNate Lawson gas.RegisterBitWidth = 32; 4556b74f9b7SNate Lawson sc->cpu_p_cnt = acpi_bus_alloc_gas(sc->cpu_dev, &cpu_rid, &gas); 4566b74f9b7SNate Lawson if (sc->cpu_p_cnt != NULL) { 45756a70eadSNate Lawson ACPI_DEBUG_PRINT((ACPI_DB_INFO, "acpi_cpu%d: P_CNT from P_BLK\n", 4586b74f9b7SNate Lawson device_get_unit(sc->cpu_dev))); 4596b74f9b7SNate Lawson } else { 4606b74f9b7SNate Lawson device_printf(sc->cpu_dev, "Failed to attach throttling P_CNT\n"); 4616b74f9b7SNate Lawson return (ENXIO); 4626b74f9b7SNate Lawson } 4636b74f9b7SNate Lawson } 4646b74f9b7SNate Lawson cpu_rid++; 4656b74f9b7SNate Lawson 4666b74f9b7SNate Lawson return (0); 467fec754d4SMike Smith } 468fec754d4SMike Smith 4696b74f9b7SNate Lawson static int 4706b74f9b7SNate Lawson acpi_cpu_cx_probe(struct acpi_cpu_softc *sc) 4716b74f9b7SNate Lawson { 4726b74f9b7SNate Lawson ACPI_GENERIC_ADDRESS gas; 4736b74f9b7SNate Lawson struct acpi_cx *cx_ptr; 47456a70eadSNate Lawson int error; 47556a70eadSNate Lawson 47656a70eadSNate Lawson ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 4776b74f9b7SNate Lawson 4786b74f9b7SNate Lawson /* Bus mastering arbitration control is needed for C3. */ 4796b74f9b7SNate Lawson if (AcpiGbl_FADT->V1_Pm2CntBlk == 0 || AcpiGbl_FADT->Pm2CntLen == 0) { 4806b74f9b7SNate Lawson cpu_quirks |= CPU_QUIRK_NO_C3; 48156a70eadSNate Lawson ACPI_DEBUG_PRINT((ACPI_DB_INFO, 48256a70eadSNate Lawson "acpi_cpu%d: No BM control, C3 disabled\n", 48356a70eadSNate Lawson device_get_unit(sc->cpu_dev))); 484fec754d4SMike Smith } 485fec754d4SMike Smith 486fec754d4SMike Smith /* 4876b74f9b7SNate Lawson * First, check for the ACPI 2.0 _CST sleep states object. 4886b74f9b7SNate Lawson * If not usable, fall back to the P_BLK's P_LVL2 and P_LVL3. 489fec754d4SMike Smith */ 49056a70eadSNate Lawson sc->cpu_cx_count = 0; 4916b74f9b7SNate Lawson error = acpi_cpu_cx_cst(sc); 4926b74f9b7SNate Lawson if (error != 0) { 4936b74f9b7SNate Lawson cx_ptr = sc->cpu_cx_states; 494fec754d4SMike Smith 4956b74f9b7SNate Lawson /* C1 has been required since just after ACPI 1.0 */ 4966b74f9b7SNate Lawson cx_ptr->type = ACPI_STATE_C1; 4976b74f9b7SNate Lawson cx_ptr->trans_lat = 0; 4986b74f9b7SNate Lawson cpu_non_c3 = 0; 4996b74f9b7SNate Lawson cx_ptr++; 50056a70eadSNate Lawson sc->cpu_cx_count++; 50156a70eadSNate Lawson 502c181b89bSNate Lawson /* 503c181b89bSNate Lawson * The spec says P_BLK must be 6 bytes long. However, some systems 504c181b89bSNate Lawson * use it to indicate a fractional set of features present so we 505c181b89bSNate Lawson * take 5 as C2. Some may also have a value of 7 to indicate 506c181b89bSNate Lawson * another C3 but most use _CST for this (as required) and having 507c181b89bSNate Lawson * "only" C1-C3 is not a hardship. 508c181b89bSNate Lawson */ 509c181b89bSNate Lawson if (sc->cpu_p_blk_len < 5) 51056a70eadSNate Lawson goto done; 511fec754d4SMike Smith 5126b74f9b7SNate Lawson /* Validate and allocate resources for C2 (P_LVL2). */ 5136b74f9b7SNate Lawson gas.AddressSpaceId = ACPI_ADR_SPACE_SYSTEM_IO; 5146b74f9b7SNate Lawson gas.RegisterBitWidth = 8; 515e5ada020SNate Lawson if (AcpiGbl_FADT->Plvl2Lat <= 100) { 51656a70eadSNate Lawson gas.Address = sc->cpu_p_blk + 4; 5176b74f9b7SNate Lawson cx_ptr->p_lvlx = acpi_bus_alloc_gas(sc->cpu_dev, &cpu_rid, &gas); 5186b74f9b7SNate Lawson if (cx_ptr->p_lvlx != NULL) { 5196b74f9b7SNate Lawson cpu_rid++; 5206b74f9b7SNate Lawson cx_ptr->type = ACPI_STATE_C2; 5216b74f9b7SNate Lawson cx_ptr->trans_lat = AcpiGbl_FADT->Plvl2Lat; 5226b74f9b7SNate Lawson cpu_non_c3 = 1; 5236b74f9b7SNate Lawson cx_ptr++; 52456a70eadSNate Lawson sc->cpu_cx_count++; 525fec754d4SMike Smith } 526fec754d4SMike Smith } 527c181b89bSNate Lawson if (sc->cpu_p_blk_len < 6) 528c181b89bSNate Lawson goto done; 529be2b1797SNate Lawson 5306b74f9b7SNate Lawson /* Validate and allocate resources for C3 (P_LVL3). */ 531e5ada020SNate Lawson if (AcpiGbl_FADT->Plvl3Lat <= 1000 && 5326b74f9b7SNate Lawson (cpu_quirks & CPU_QUIRK_NO_C3) == 0) { 5336b74f9b7SNate Lawson 53456a70eadSNate Lawson gas.Address = sc->cpu_p_blk + 5; 5356b74f9b7SNate Lawson cx_ptr->p_lvlx = acpi_bus_alloc_gas(sc->cpu_dev, &cpu_rid, &gas); 5366b74f9b7SNate Lawson if (cx_ptr->p_lvlx != NULL) { 5376b74f9b7SNate Lawson cpu_rid++; 5386b74f9b7SNate Lawson cx_ptr->type = ACPI_STATE_C3; 5396b74f9b7SNate Lawson cx_ptr->trans_lat = AcpiGbl_FADT->Plvl3Lat; 5406b74f9b7SNate Lawson cx_ptr++; 54156a70eadSNate Lawson sc->cpu_cx_count++; 5426b74f9b7SNate Lawson } 5436b74f9b7SNate Lawson } 5446b74f9b7SNate Lawson } 5456b74f9b7SNate Lawson 54656a70eadSNate Lawson done: 5476b74f9b7SNate Lawson /* If no valid registers were found, don't attach. */ 54856a70eadSNate Lawson if (sc->cpu_cx_count == 0) 5496b74f9b7SNate Lawson return (ENXIO); 5506b74f9b7SNate Lawson 5516b74f9b7SNate Lawson return (0); 5526b74f9b7SNate Lawson } 5536b74f9b7SNate Lawson 5546b74f9b7SNate Lawson /* 5556b74f9b7SNate Lawson * Parse a _CST package and set up its Cx states. Since the _CST object 5566b74f9b7SNate Lawson * can change dynamically, our notify handler may call this function 5576b74f9b7SNate Lawson * to clean up and probe the new _CST package. 5586b74f9b7SNate Lawson */ 5596b74f9b7SNate Lawson static int 5606b74f9b7SNate Lawson acpi_cpu_cx_cst(struct acpi_cpu_softc *sc) 5616b74f9b7SNate Lawson { 5626b74f9b7SNate Lawson struct acpi_cx *cx_ptr; 5636b74f9b7SNate Lawson ACPI_STATUS status; 5646b74f9b7SNate Lawson ACPI_BUFFER buf; 5656b74f9b7SNate Lawson ACPI_OBJECT *top; 5666b74f9b7SNate Lawson ACPI_OBJECT *pkg; 5676b74f9b7SNate Lawson uint32_t count; 5686b74f9b7SNate Lawson int i; 5696b74f9b7SNate Lawson 57056a70eadSNate Lawson ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 57156a70eadSNate Lawson 5726b74f9b7SNate Lawson buf.Pointer = NULL; 5736b74f9b7SNate Lawson buf.Length = ACPI_ALLOCATE_BUFFER; 5746b74f9b7SNate Lawson status = AcpiEvaluateObject(sc->cpu_handle, "_CST", NULL, &buf); 5756b74f9b7SNate Lawson if (ACPI_FAILURE(status)) 5766b74f9b7SNate Lawson return (ENXIO); 5776b74f9b7SNate Lawson 5786b74f9b7SNate Lawson /* _CST is a package with a count and at least one Cx package. */ 5796b74f9b7SNate Lawson top = (ACPI_OBJECT *)buf.Pointer; 58021cea91fSNate Lawson if (!ACPI_PKG_VALID(top, 2) || acpi_PkgInt32(top, 0, &count) != 0) { 5816b74f9b7SNate Lawson device_printf(sc->cpu_dev, "Invalid _CST package\n"); 5826b74f9b7SNate Lawson AcpiOsFree(buf.Pointer); 5836b74f9b7SNate Lawson return (ENXIO); 5846b74f9b7SNate Lawson } 5856b74f9b7SNate Lawson if (count != top->Package.Count - 1) { 5866b74f9b7SNate Lawson device_printf(sc->cpu_dev, "Invalid _CST state count (%d != %d)\n", 5876b74f9b7SNate Lawson count, top->Package.Count - 1); 5886b74f9b7SNate Lawson count = top->Package.Count - 1; 5896b74f9b7SNate Lawson } 5906b74f9b7SNate Lawson if (count > MAX_CX_STATES) { 59156a70eadSNate Lawson device_printf(sc->cpu_dev, "_CST has too many states (%d)\n", count); 5926b74f9b7SNate Lawson count = MAX_CX_STATES; 5936b74f9b7SNate Lawson } 5946b74f9b7SNate Lawson 5956b74f9b7SNate Lawson /* Set up all valid states. */ 59656a70eadSNate Lawson sc->cpu_cx_count = 0; 5976b74f9b7SNate Lawson cx_ptr = sc->cpu_cx_states; 5986b74f9b7SNate Lawson for (i = 0; i < count; i++) { 5996b74f9b7SNate Lawson pkg = &top->Package.Elements[i + 1]; 60021cea91fSNate Lawson if (!ACPI_PKG_VALID(pkg, 4) || 60121cea91fSNate Lawson acpi_PkgInt32(pkg, 1, &cx_ptr->type) != 0 || 60221cea91fSNate Lawson acpi_PkgInt32(pkg, 2, &cx_ptr->trans_lat) != 0 || 60321cea91fSNate Lawson acpi_PkgInt32(pkg, 3, &cx_ptr->power) != 0) { 60421cea91fSNate Lawson 6056b74f9b7SNate Lawson device_printf(sc->cpu_dev, "Skipping invalid Cx state package\n"); 6066b74f9b7SNate Lawson continue; 6076b74f9b7SNate Lawson } 6086b74f9b7SNate Lawson 6096b74f9b7SNate Lawson /* Validate the state to see if we should use it. */ 6106b74f9b7SNate Lawson switch (cx_ptr->type) { 6116b74f9b7SNate Lawson case ACPI_STATE_C1: 6126b74f9b7SNate Lawson cpu_non_c3 = i; 6136b74f9b7SNate Lawson cx_ptr++; 61456a70eadSNate Lawson sc->cpu_cx_count++; 6156b74f9b7SNate Lawson continue; 6166b74f9b7SNate Lawson case ACPI_STATE_C2: 6176b74f9b7SNate Lawson if (cx_ptr->trans_lat > 100) { 61856a70eadSNate Lawson ACPI_DEBUG_PRINT((ACPI_DB_INFO, 61956a70eadSNate Lawson "acpi_cpu%d: C2[%d] not available.\n", 62056a70eadSNate Lawson device_get_unit(sc->cpu_dev), i)); 6216b74f9b7SNate Lawson continue; 6226b74f9b7SNate Lawson } 6236b74f9b7SNate Lawson cpu_non_c3 = i; 6246b74f9b7SNate Lawson break; 6256b74f9b7SNate Lawson case ACPI_STATE_C3: 6266b74f9b7SNate Lawson default: 6276b74f9b7SNate Lawson if (cx_ptr->trans_lat > 1000 || 6286b74f9b7SNate Lawson (cpu_quirks & CPU_QUIRK_NO_C3) != 0) { 6296b74f9b7SNate Lawson 63056a70eadSNate Lawson ACPI_DEBUG_PRINT((ACPI_DB_INFO, 63156a70eadSNate Lawson "acpi_cpu%d: C3[%d] not available.\n", 63256a70eadSNate Lawson device_get_unit(sc->cpu_dev), i)); 6336b74f9b7SNate Lawson continue; 6346b74f9b7SNate Lawson } 6356b74f9b7SNate Lawson break; 6366b74f9b7SNate Lawson } 6376b74f9b7SNate Lawson 6386b74f9b7SNate Lawson #ifdef notyet 6396b74f9b7SNate Lawson /* Free up any previous register. */ 6406b74f9b7SNate Lawson if (cx_ptr->p_lvlx != NULL) { 6416b74f9b7SNate Lawson bus_release_resource(sc->cpu_dev, 0, 0, cx_ptr->p_lvlx); 6426b74f9b7SNate Lawson cx_ptr->p_lvlx = NULL; 6436b74f9b7SNate Lawson } 6446b74f9b7SNate Lawson #endif 6456b74f9b7SNate Lawson 6466b74f9b7SNate Lawson /* Allocate the control register for C2 or C3. */ 6476b74f9b7SNate Lawson acpi_PkgGas(sc->cpu_dev, pkg, 0, &cpu_rid, &cx_ptr->p_lvlx); 6486b74f9b7SNate Lawson if (cx_ptr->p_lvlx != NULL) { 6496b74f9b7SNate Lawson cpu_rid++; 65056a70eadSNate Lawson ACPI_DEBUG_PRINT((ACPI_DB_INFO, 65156a70eadSNate Lawson "acpi_cpu%d: Got C%d - %d latency\n", 65256a70eadSNate Lawson device_get_unit(sc->cpu_dev), cx_ptr->type, 65356a70eadSNate Lawson cx_ptr->trans_lat)); 6546b74f9b7SNate Lawson cx_ptr++; 65556a70eadSNate Lawson sc->cpu_cx_count++; 6566b74f9b7SNate Lawson } 6576b74f9b7SNate Lawson } 6586b74f9b7SNate Lawson AcpiOsFree(buf.Pointer); 6596b74f9b7SNate Lawson 6606b74f9b7SNate Lawson return (0); 661fec754d4SMike Smith } 662fec754d4SMike Smith 663fec754d4SMike Smith /* 664fec754d4SMike Smith * Call this *after* all CPUs have been attached. 665fec754d4SMike Smith */ 666fec754d4SMike Smith static void 6676b74f9b7SNate Lawson acpi_cpu_startup(void *arg) 668fec754d4SMike Smith { 66956a70eadSNate Lawson struct acpi_cpu_softc *sc; 67056a70eadSNate Lawson int count, i; 671fec754d4SMike Smith 672be2b1797SNate Lawson /* Get set of CPU devices */ 673fec754d4SMike Smith devclass_get_devices(acpi_cpu_devclass, &cpu_devices, &cpu_ndevices); 674fec754d4SMike Smith 67556a70eadSNate Lawson /* 67656a70eadSNate Lawson * Make sure all the processors' Cx counts match. We should probably 67756a70eadSNate Lawson * also check the contents of each. However, no known systems have 67856a70eadSNate Lawson * non-matching Cx counts so we'll deal with this later. 67956a70eadSNate Lawson */ 68056a70eadSNate Lawson count = MAX_CX_STATES; 68156a70eadSNate Lawson for (i = 0; i < cpu_ndevices; i++) { 68256a70eadSNate Lawson sc = device_get_softc(cpu_devices[i]); 68356a70eadSNate Lawson count = min(sc->cpu_cx_count, count); 68456a70eadSNate Lawson } 68556a70eadSNate Lawson cpu_cx_count = count; 68656a70eadSNate Lawson 68756a70eadSNate Lawson /* Perform throttling and Cx final initialization. */ 68856a70eadSNate Lawson sc = device_get_softc(cpu_devices[0]); 6896b74f9b7SNate Lawson if (sc->cpu_p_cnt != NULL) 6906b74f9b7SNate Lawson acpi_cpu_startup_throttling(); 69156a70eadSNate Lawson if (cpu_cx_count > 0) 69256a70eadSNate Lawson acpi_cpu_startup_cx(); 6936b74f9b7SNate Lawson } 6946b74f9b7SNate Lawson 69556a70eadSNate Lawson /* 69656a70eadSNate Lawson * Takes the ACPI lock to avoid fighting anyone over the SMI command 69756a70eadSNate Lawson * port. 69856a70eadSNate Lawson */ 6996b74f9b7SNate Lawson static void 7006b74f9b7SNate Lawson acpi_cpu_startup_throttling() 7016b74f9b7SNate Lawson { 70256a70eadSNate Lawson ACPI_LOCK_DECL; 7036b74f9b7SNate Lawson 704be2b1797SNate Lawson /* Initialise throttling states */ 7050d8fb61aSNate Lawson cpu_throttle_max = CPU_MAX_SPEED; 7060d8fb61aSNate Lawson cpu_throttle_state = CPU_MAX_SPEED; 707be2b1797SNate Lawson 70856a70eadSNate Lawson SYSCTL_ADD_INT(&acpi_cpu_sysctl_ctx, 70956a70eadSNate Lawson SYSCTL_CHILDREN(acpi_cpu_sysctl_tree), 7100d8fb61aSNate Lawson OID_AUTO, "throttle_max", CTLFLAG_RD, 7110d8fb61aSNate Lawson &cpu_throttle_max, 0, "maximum CPU speed"); 71256a70eadSNate Lawson SYSCTL_ADD_PROC(&acpi_cpu_sysctl_ctx, 71356a70eadSNate Lawson SYSCTL_CHILDREN(acpi_cpu_sysctl_tree), 7140d8fb61aSNate Lawson OID_AUTO, "throttle_state", 7150d8fb61aSNate Lawson CTLTYPE_INT | CTLFLAG_RW, &cpu_throttle_state, 7160d8fb61aSNate Lawson 0, acpi_cpu_throttle_sysctl, "I", "current CPU speed"); 717fec754d4SMike Smith 71856a70eadSNate Lawson /* If ACPI 2.0+, signal platform that we are taking over throttling. */ 71956a70eadSNate Lawson ACPI_LOCK; 7200d8fb61aSNate Lawson if (cpu_pstate_cnt != 0) 72156a70eadSNate Lawson AcpiOsWritePort(cpu_smi_cmd, cpu_pstate_cnt, 8); 722fec754d4SMike Smith 7230d8fb61aSNate Lawson /* Set initial speed to maximum. */ 7240d8fb61aSNate Lawson acpi_cpu_throttle_set(cpu_throttle_max); 7250d8fb61aSNate Lawson ACPI_UNLOCK; 726fec754d4SMike Smith 727a40f20c7SNate Lawson printf("acpi_cpu: throttling enabled, %d steps (100%% to %d.%d%%), " 728a40f20c7SNate Lawson "currently %d.%d%%\n", CPU_MAX_SPEED, CPU_SPEED_PRINTABLE(1), 7290d8fb61aSNate Lawson CPU_SPEED_PRINTABLE(cpu_throttle_state)); 730fec754d4SMike Smith } 731fec754d4SMike Smith 73256a70eadSNate Lawson static void 73356a70eadSNate Lawson acpi_cpu_startup_cx() 73456a70eadSNate Lawson { 73556a70eadSNate Lawson struct acpi_cpu_softc *sc; 73656a70eadSNate Lawson struct sbuf sb; 73756a70eadSNate Lawson int i; 73856a70eadSNate Lawson ACPI_LOCK_DECL; 73956a70eadSNate Lawson 74056a70eadSNate Lawson sc = device_get_softc(cpu_devices[0]); 74156a70eadSNate Lawson sbuf_new(&sb, cpu_cx_supported, sizeof(cpu_cx_supported), SBUF_FIXEDLEN); 74256a70eadSNate Lawson for (i = 0; i < cpu_cx_count; i++) { 74356a70eadSNate Lawson sbuf_printf(&sb, "C%d/%d ", sc->cpu_cx_states[i].type, 74456a70eadSNate Lawson sc->cpu_cx_states[i].trans_lat); 74556a70eadSNate Lawson } 74656a70eadSNate Lawson sbuf_trim(&sb); 74756a70eadSNate Lawson sbuf_finish(&sb); 74856a70eadSNate Lawson SYSCTL_ADD_STRING(&acpi_cpu_sysctl_ctx, 74956a70eadSNate Lawson SYSCTL_CHILDREN(acpi_cpu_sysctl_tree), 75056a70eadSNate Lawson OID_AUTO, "cx_supported", CTLFLAG_RD, cpu_cx_supported, 75156a70eadSNate Lawson 0, "Cx/microsecond values for supported Cx states"); 75256a70eadSNate Lawson SYSCTL_ADD_PROC(&acpi_cpu_sysctl_ctx, 75356a70eadSNate Lawson SYSCTL_CHILDREN(acpi_cpu_sysctl_tree), 75456a70eadSNate Lawson OID_AUTO, "cx_lowest", CTLTYPE_INT | CTLFLAG_RW, 75556a70eadSNate Lawson NULL, 0, acpi_cpu_cx_lowest_sysctl, "I", 75656a70eadSNate Lawson "lowest Cx sleep state to use"); 75756a70eadSNate Lawson SYSCTL_ADD_PROC(&acpi_cpu_sysctl_ctx, 75856a70eadSNate Lawson SYSCTL_CHILDREN(acpi_cpu_sysctl_tree), 75956a70eadSNate Lawson OID_AUTO, "cx_history", CTLTYPE_STRING | CTLFLAG_RD, 76008b994c0SNate Lawson NULL, 0, acpi_cpu_history_sysctl, "A", 76108b994c0SNate Lawson "count of full sleeps for Cx state / short sleeps"); 76256a70eadSNate Lawson 76356a70eadSNate Lawson #ifdef notyet 76456a70eadSNate Lawson /* Signal platform that we can handle _CST notification. */ 76556a70eadSNate Lawson if (cpu_cst_cnt != 0) { 76656a70eadSNate Lawson ACPI_LOCK; 76756a70eadSNate Lawson AcpiOsWritePort(cpu_smi_cmd, cpu_cst_cnt, 8); 76856a70eadSNate Lawson ACPI_UNLOCK; 76956a70eadSNate Lawson } 77056a70eadSNate Lawson #endif 77156a70eadSNate Lawson 77256a70eadSNate Lawson /* Take over idling from cpu_idle_default(). */ 77356a70eadSNate Lawson cpu_cx_next = cpu_cx_lowest; 77456a70eadSNate Lawson cpu_idle_hook = acpi_cpu_idle; 77556a70eadSNate Lawson } 77656a70eadSNate Lawson 777fec754d4SMike Smith /* 778fec754d4SMike Smith * Set CPUs to the new state. 779fec754d4SMike Smith * 780fec754d4SMike Smith * Must be called with the ACPI lock held. 781fec754d4SMike Smith */ 782fec754d4SMike Smith static void 7836b74f9b7SNate Lawson acpi_cpu_throttle_set(uint32_t speed) 784fec754d4SMike Smith { 785fec754d4SMike Smith struct acpi_cpu_softc *sc; 786fec754d4SMike Smith int i; 7876b74f9b7SNate Lawson uint32_t p_cnt, clk_val; 788fec754d4SMike Smith 789fec754d4SMike Smith ACPI_ASSERTLOCK; 790fec754d4SMike Smith 791be2b1797SNate Lawson /* Iterate over processors */ 792fec754d4SMike Smith for (i = 0; i < cpu_ndevices; i++) { 793fec754d4SMike Smith sc = device_get_softc(cpu_devices[i]); 7946b74f9b7SNate Lawson if (sc->cpu_p_cnt == NULL) 795fec754d4SMike Smith continue; 796fec754d4SMike Smith 797be2b1797SNate Lawson /* Get the current P_CNT value and disable throttling */ 7986b74f9b7SNate Lawson p_cnt = CPU_GET_REG(sc->cpu_p_cnt, 4); 799fec754d4SMike Smith p_cnt &= ~CPU_P_CNT_THT_EN; 8006b74f9b7SNate Lawson CPU_SET_REG(sc->cpu_p_cnt, 4, p_cnt); 801fec754d4SMike Smith 802be2b1797SNate Lawson /* If we're at maximum speed, that's all */ 803fec754d4SMike Smith if (speed < CPU_MAX_SPEED) { 804be2b1797SNate Lawson /* Mask the old CLK_VAL off and or-in the new value */ 805b279c35aSNate Lawson clk_val = (CPU_MAX_SPEED - 1) << cpu_duty_offset; 806fec754d4SMike Smith p_cnt &= ~clk_val; 807fec754d4SMike Smith p_cnt |= (speed << cpu_duty_offset); 808fec754d4SMike Smith 809be2b1797SNate Lawson /* Write the new P_CNT value and then enable throttling */ 8106b74f9b7SNate Lawson CPU_SET_REG(sc->cpu_p_cnt, 4, p_cnt); 811fec754d4SMike Smith p_cnt |= CPU_P_CNT_THT_EN; 8126b74f9b7SNate Lawson CPU_SET_REG(sc->cpu_p_cnt, 4, p_cnt); 813fec754d4SMike Smith } 8146971b3c7SMitsuru IWASAKI ACPI_VPRINT(sc->cpu_dev, acpi_device_get_parent_softc(sc->cpu_dev), 8156971b3c7SMitsuru IWASAKI "set speed to %d.%d%%\n", CPU_SPEED_PRINTABLE(speed)); 816fec754d4SMike Smith } 8170d8fb61aSNate Lawson cpu_throttle_state = speed; 818fec754d4SMike Smith } 819fec754d4SMike Smith 820fec754d4SMike Smith /* 8216b74f9b7SNate Lawson * Idle the CPU in the lowest state possible. 8226b74f9b7SNate Lawson * This function is called with interrupts disabled. 8236b74f9b7SNate Lawson */ 8246b74f9b7SNate Lawson static void 8256b74f9b7SNate Lawson acpi_cpu_idle() 8266b74f9b7SNate Lawson { 8276b74f9b7SNate Lawson struct acpi_cpu_softc *sc; 82856a70eadSNate Lawson struct acpi_cx *cx_next; 8296b74f9b7SNate Lawson uint32_t start_time, end_time; 83056a70eadSNate Lawson int bm_active, i, asleep; 8316b74f9b7SNate Lawson 8326b74f9b7SNate Lawson /* If disabled, return immediately. */ 83356a70eadSNate Lawson if (cpu_cx_count == 0) { 8346b74f9b7SNate Lawson ACPI_ENABLE_IRQS(); 8356b74f9b7SNate Lawson return; 8366b74f9b7SNate Lawson } 8376b74f9b7SNate Lawson 838cd1f3db9SNate Lawson /* 839cd1f3db9SNate Lawson * Look up our CPU id to get our softc. If it's NULL, we'll use C1 840cd1f3db9SNate Lawson * since there is no ACPI processor object for this CPU. This occurs 841cd1f3db9SNate Lawson * for logical CPUs in the HTT case. 842cd1f3db9SNate Lawson */ 843cd1f3db9SNate Lawson sc = cpu_softc[PCPU_GET(cpuid)]; 844cd1f3db9SNate Lawson if (sc == NULL) { 845cd1f3db9SNate Lawson acpi_cpu_c1(); 846cd1f3db9SNate Lawson return; 847cd1f3db9SNate Lawson } 848cd1f3db9SNate Lawson 84956a70eadSNate Lawson /* Record that a CPU is in the idle function. */ 85056a70eadSNate Lawson atomic_add_int(&cpu_idle_busy, 1); 85156a70eadSNate Lawson 8526b74f9b7SNate Lawson /* 8536b74f9b7SNate Lawson * Check for bus master activity. If there was activity, clear 8546b74f9b7SNate Lawson * the bit and use the lowest non-C3 state. Note that the USB 8556b74f9b7SNate Lawson * driver polling for new devices keeps this bit set all the 8566b74f9b7SNate Lawson * time if USB is enabled. 8576b74f9b7SNate Lawson */ 8586b74f9b7SNate Lawson AcpiGetRegister(ACPI_BITREG_BUS_MASTER_STATUS, &bm_active, 8596b74f9b7SNate Lawson ACPI_MTX_DO_NOT_LOCK); 8606b74f9b7SNate Lawson if (bm_active != 0) { 8616b74f9b7SNate Lawson AcpiSetRegister(ACPI_BITREG_BUS_MASTER_STATUS, 1, 8626b74f9b7SNate Lawson ACPI_MTX_DO_NOT_LOCK); 8636b74f9b7SNate Lawson cpu_cx_next = min(cpu_cx_next, cpu_non_c3); 8646b74f9b7SNate Lawson } 8656b74f9b7SNate Lawson 8666b74f9b7SNate Lawson /* Perform the actual sleep based on the Cx-specific semantics. */ 8676b74f9b7SNate Lawson cx_next = &sc->cpu_cx_states[cpu_cx_next]; 8686b74f9b7SNate Lawson switch (cx_next->type) { 86956a70eadSNate Lawson case ACPI_STATE_C0: 87056a70eadSNate Lawson panic("acpi_cpu_idle: attempting to sleep in C0"); 87156a70eadSNate Lawson /* NOTREACHED */ 8726b74f9b7SNate Lawson case ACPI_STATE_C1: 8736b74f9b7SNate Lawson /* Execute HLT (or equivalent) and wait for an interrupt. */ 8746b74f9b7SNate Lawson acpi_cpu_c1(); 8756b74f9b7SNate Lawson 8766b74f9b7SNate Lawson /* 8776b74f9b7SNate Lawson * We can't calculate the time spent in C1 since the place we 8786b74f9b7SNate Lawson * wake up is an ISR. Use a constant time of 1 ms. 8796b74f9b7SNate Lawson */ 8806b74f9b7SNate Lawson start_time = 0; 8816b74f9b7SNate Lawson end_time = 1000; 8826b74f9b7SNate Lawson break; 8836b74f9b7SNate Lawson case ACPI_STATE_C2: 8846b74f9b7SNate Lawson /* 8856b74f9b7SNate Lawson * Read from P_LVLx to enter C2, checking time spent asleep. 8866b74f9b7SNate Lawson * Use the ACPI timer for measuring sleep time. Since we need to 8876b74f9b7SNate Lawson * get the time very close to the CPU start/stop clock logic, this 8886b74f9b7SNate Lawson * is the only reliable time source. 8896b74f9b7SNate Lawson */ 8906b74f9b7SNate Lawson AcpiHwLowLevelRead(32, &start_time, &AcpiGbl_FADT->XPmTmrBlk); 8916b74f9b7SNate Lawson CPU_GET_REG(cx_next->p_lvlx, 1); 8926b74f9b7SNate Lawson 8936b74f9b7SNate Lawson /* 8946b74f9b7SNate Lawson * Read the end time twice. Since it may take an arbitrary time 8956b74f9b7SNate Lawson * to enter the idle state, the first read may be executed before 8966b74f9b7SNate Lawson * the processor has stopped. Doing it again provides enough 8976b74f9b7SNate Lawson * margin that we are certain to have a correct value. 8986b74f9b7SNate Lawson */ 8996b74f9b7SNate Lawson AcpiHwLowLevelRead(32, &end_time, &AcpiGbl_FADT->XPmTmrBlk); 9006b74f9b7SNate Lawson AcpiHwLowLevelRead(32, &end_time, &AcpiGbl_FADT->XPmTmrBlk); 9016b74f9b7SNate Lawson ACPI_ENABLE_IRQS(); 9026b74f9b7SNate Lawson break; 9036b74f9b7SNate Lawson case ACPI_STATE_C3: 9046b74f9b7SNate Lawson default: 9056b74f9b7SNate Lawson /* Disable bus master arbitration and enable bus master wakeup. */ 9066b74f9b7SNate Lawson AcpiSetRegister(ACPI_BITREG_ARB_DISABLE, 1, ACPI_MTX_DO_NOT_LOCK); 9076b74f9b7SNate Lawson AcpiSetRegister(ACPI_BITREG_BUS_MASTER_RLD, 1, ACPI_MTX_DO_NOT_LOCK); 9086b74f9b7SNate Lawson 9096b74f9b7SNate Lawson /* Read from P_LVLx to enter C3, checking time spent asleep. */ 9106b74f9b7SNate Lawson AcpiHwLowLevelRead(32, &start_time, &AcpiGbl_FADT->XPmTmrBlk); 9116b74f9b7SNate Lawson CPU_GET_REG(cx_next->p_lvlx, 1); 9126b74f9b7SNate Lawson 9136b74f9b7SNate Lawson /* Read the end time twice. See comment for C2 above. */ 9146b74f9b7SNate Lawson AcpiHwLowLevelRead(32, &end_time, &AcpiGbl_FADT->XPmTmrBlk); 9156b74f9b7SNate Lawson AcpiHwLowLevelRead(32, &end_time, &AcpiGbl_FADT->XPmTmrBlk); 9166b74f9b7SNate Lawson 9176b74f9b7SNate Lawson /* Enable bus master arbitration and disable bus master wakeup. */ 9186b74f9b7SNate Lawson AcpiSetRegister(ACPI_BITREG_ARB_DISABLE, 0, ACPI_MTX_DO_NOT_LOCK); 9196b74f9b7SNate Lawson AcpiSetRegister(ACPI_BITREG_BUS_MASTER_RLD, 0, ACPI_MTX_DO_NOT_LOCK); 9206b74f9b7SNate Lawson ACPI_ENABLE_IRQS(); 9216b74f9b7SNate Lawson break; 9226b74f9b7SNate Lawson } 9236b74f9b7SNate Lawson 9246b74f9b7SNate Lawson /* Find the actual time asleep in microseconds, minus overhead. */ 925eea17c34SNate Lawson end_time = acpi_TimerDelta(end_time, start_time); 9266b74f9b7SNate Lawson asleep = PM_USEC(end_time) - cx_next->trans_lat; 9276b74f9b7SNate Lawson 9286b74f9b7SNate Lawson /* Record statistics */ 9296b74f9b7SNate Lawson if (asleep < cx_next->trans_lat) 9306b74f9b7SNate Lawson cpu_cx_stats[cpu_cx_next].short_slp++; 9316b74f9b7SNate Lawson else 9326b74f9b7SNate Lawson cpu_cx_stats[cpu_cx_next].long_slp++; 9336b74f9b7SNate Lawson 9346b74f9b7SNate Lawson /* 9356b74f9b7SNate Lawson * If we slept 100 us or more, use the lowest Cx state. 9366b74f9b7SNate Lawson * Otherwise, find the lowest state that has a latency less than 9376b74f9b7SNate Lawson * or equal to the length of our last sleep. 9386b74f9b7SNate Lawson */ 9396b74f9b7SNate Lawson if (asleep >= 100) 9406b74f9b7SNate Lawson cpu_cx_next = cpu_cx_lowest; 9416b74f9b7SNate Lawson else { 9426b74f9b7SNate Lawson for (i = cpu_cx_lowest; i >= 0; i--) { 9436b74f9b7SNate Lawson if (sc->cpu_cx_states[i].trans_lat <= asleep) { 9446b74f9b7SNate Lawson cpu_cx_next = i; 9456b74f9b7SNate Lawson break; 9466b74f9b7SNate Lawson } 9476b74f9b7SNate Lawson } 9486b74f9b7SNate Lawson } 94956a70eadSNate Lawson 95056a70eadSNate Lawson /* Decrement reference count checked by acpi_cpu_shutdown(). */ 95156a70eadSNate Lawson atomic_subtract_int(&cpu_idle_busy, 1); 9526b74f9b7SNate Lawson } 9536b74f9b7SNate Lawson 9546b74f9b7SNate Lawson /* Put the CPU in C1 in a machine-dependant way. */ 9556b74f9b7SNate Lawson static void 9566b74f9b7SNate Lawson acpi_cpu_c1() 9576b74f9b7SNate Lawson { 9586b74f9b7SNate Lawson #ifdef __ia64__ 9596b74f9b7SNate Lawson ia64_call_pal_static(PAL_HALT_LIGHT, 0, 0, 0); 9606b74f9b7SNate Lawson #else 9616b74f9b7SNate Lawson __asm __volatile("sti; hlt"); 9626b74f9b7SNate Lawson #endif 9636b74f9b7SNate Lawson } 9646b74f9b7SNate Lawson 9656b74f9b7SNate Lawson /* 9666b74f9b7SNate Lawson * Re-evaluate the _PSS and _CST objects when we are notified that they 9676b74f9b7SNate Lawson * have changed. 96856a70eadSNate Lawson * 9696b74f9b7SNate Lawson * XXX Re-evaluation disabled until locking is done. 9706b74f9b7SNate Lawson */ 9716b74f9b7SNate Lawson static void 9726b74f9b7SNate Lawson acpi_cpu_notify(ACPI_HANDLE h, UINT32 notify, void *context) 9736b74f9b7SNate Lawson { 9746b74f9b7SNate Lawson struct acpi_cpu_softc *sc = (struct acpi_cpu_softc *)context; 9756b74f9b7SNate Lawson 9766b74f9b7SNate Lawson switch (notify) { 9776b74f9b7SNate Lawson case ACPI_CPU_NOTIFY_PERF_STATES: 9786b74f9b7SNate Lawson device_printf(sc->cpu_dev, "Performance states changed\n"); 9796b74f9b7SNate Lawson /* acpi_cpu_px_available(sc); */ 9806b74f9b7SNate Lawson break; 9816b74f9b7SNate Lawson case ACPI_CPU_NOTIFY_CX_STATES: 9826b74f9b7SNate Lawson device_printf(sc->cpu_dev, "Cx states changed\n"); 9836b74f9b7SNate Lawson /* acpi_cpu_cx_cst(sc); */ 9846b74f9b7SNate Lawson break; 9856b74f9b7SNate Lawson default: 9866b74f9b7SNate Lawson device_printf(sc->cpu_dev, "Unknown notify %#x\n", notify); 9876b74f9b7SNate Lawson break; 9886b74f9b7SNate Lawson } 9896b74f9b7SNate Lawson } 9906b74f9b7SNate Lawson 9916b74f9b7SNate Lawson static int 9926b74f9b7SNate Lawson acpi_cpu_quirks(struct acpi_cpu_softc *sc) 9936b74f9b7SNate Lawson { 9946b74f9b7SNate Lawson 9956b74f9b7SNate Lawson /* 9966b74f9b7SNate Lawson * C3 is not supported on multiple CPUs since this would require 9976b74f9b7SNate Lawson * flushing all caches which is currently too expensive. 9986b74f9b7SNate Lawson */ 999447a5fa1SJohn Baldwin if (mp_ncpus > 1) 10006b74f9b7SNate Lawson cpu_quirks |= CPU_QUIRK_NO_C3; 10016b74f9b7SNate Lawson 10026b74f9b7SNate Lawson #ifdef notyet 10036b74f9b7SNate Lawson /* Look for various quirks of the PIIX4 part. */ 10046b74f9b7SNate Lawson acpi_dev = pci_find_device(PCI_VENDOR_INTEL, PCI_DEVICE_82371AB_3); 10056b74f9b7SNate Lawson if (acpi_dev != NULL) { 10066b74f9b7SNate Lawson switch (pci_get_revid(acpi_dev)) { 10076b74f9b7SNate Lawson /* 10086b74f9b7SNate Lawson * Disable throttling control on PIIX4 A and B-step. 10096b74f9b7SNate Lawson * See specification changes #13 ("Manual Throttle Duty Cycle") 10106b74f9b7SNate Lawson * and #14 ("Enabling and Disabling Manual Throttle"), plus 10116b74f9b7SNate Lawson * erratum #5 ("STPCLK# Deassertion Time") from the January 10126b74f9b7SNate Lawson * 2002 PIIX4 specification update. Note that few (if any) 10136b74f9b7SNate Lawson * mobile systems ever used this part. 10146b74f9b7SNate Lawson */ 10156b74f9b7SNate Lawson case PCI_REVISION_A_STEP: 10166b74f9b7SNate Lawson case PCI_REVISION_B_STEP: 10176b74f9b7SNate Lawson cpu_quirks |= CPU_QUIRK_NO_THROTTLE; 10186b74f9b7SNate Lawson /* FALLTHROUGH */ 10196b74f9b7SNate Lawson /* 10206b74f9b7SNate Lawson * Disable C3 support for all PIIX4 chipsets. Some of these parts 10216b74f9b7SNate Lawson * do not report the BMIDE status to the BM status register and 10226b74f9b7SNate Lawson * others have a livelock bug if Type-F DMA is enabled. Linux 10236b74f9b7SNate Lawson * works around the BMIDE bug by reading the BM status directly 10246b74f9b7SNate Lawson * but we take the simpler approach of disabling C3 for these 10256b74f9b7SNate Lawson * parts. 10266b74f9b7SNate Lawson * 10276b74f9b7SNate Lawson * See erratum #18 ("C3 Power State/BMIDE and Type-F DMA 10286b74f9b7SNate Lawson * Livelock") from the January 2002 PIIX4 specification update. 10296b74f9b7SNate Lawson * Applies to all PIIX4 models. 10306b74f9b7SNate Lawson */ 10316b74f9b7SNate Lawson case PCI_REVISION_4E: 10326b74f9b7SNate Lawson case PCI_REVISION_4M: 10336b74f9b7SNate Lawson cpu_quirks |= CPU_QUIRK_NO_C3; 10346b74f9b7SNate Lawson break; 10356b74f9b7SNate Lawson default: 10366b74f9b7SNate Lawson break; 10376b74f9b7SNate Lawson } 10386b74f9b7SNate Lawson } 10396b74f9b7SNate Lawson #endif 10406b74f9b7SNate Lawson 10416b74f9b7SNate Lawson return (0); 10426b74f9b7SNate Lawson } 10436b74f9b7SNate Lawson 10440d8fb61aSNate Lawson /* Handle changes in the CPU throttling setting. */ 1045fec754d4SMike Smith static int 10466b74f9b7SNate Lawson acpi_cpu_throttle_sysctl(SYSCTL_HANDLER_ARGS) 1047fec754d4SMike Smith { 10486b74f9b7SNate Lawson uint32_t *argp; 10496b74f9b7SNate Lawson uint32_t arg; 1050fec754d4SMike Smith int error; 10510d8fb61aSNate Lawson ACPI_LOCK_DECL; 1052fec754d4SMike Smith 10536b74f9b7SNate Lawson argp = (uint32_t *)oidp->oid_arg1; 1054fec754d4SMike Smith arg = *argp; 1055fec754d4SMike Smith error = sysctl_handle_int(oidp, &arg, 0, req); 1056fec754d4SMike Smith 1057be2b1797SNate Lawson /* Error or no new value */ 1058be2b1797SNate Lawson if (error != 0 || req->newptr == NULL) 1059fec754d4SMike Smith return (error); 10600d8fb61aSNate Lawson if (arg < 1 || arg > cpu_throttle_max) 1061fec754d4SMike Smith return (EINVAL); 1062fec754d4SMike Smith 10630d8fb61aSNate Lawson /* If throttling changed, notify the BIOS of the new rate. */ 10640d8fb61aSNate Lawson ACPI_LOCK; 10650d8fb61aSNate Lawson if (*argp != arg) { 1066fec754d4SMike Smith *argp = arg; 10670d8fb61aSNate Lawson acpi_cpu_throttle_set(arg); 10680d8fb61aSNate Lawson } 10690d8fb61aSNate Lawson ACPI_UNLOCK; 1070fec754d4SMike Smith 1071fec754d4SMike Smith return (0); 1072fec754d4SMike Smith } 10736b74f9b7SNate Lawson 10746b74f9b7SNate Lawson static int 10756b74f9b7SNate Lawson acpi_cpu_history_sysctl(SYSCTL_HANDLER_ARGS) 10766b74f9b7SNate Lawson { 10776b74f9b7SNate Lawson struct sbuf sb; 10786b74f9b7SNate Lawson char buf[128]; 10796b74f9b7SNate Lawson int i; 10806b74f9b7SNate Lawson 10816b74f9b7SNate Lawson sbuf_new(&sb, buf, sizeof(buf), SBUF_FIXEDLEN); 10826b74f9b7SNate Lawson for (i = 0; i < cpu_cx_count; i++) { 10836b74f9b7SNate Lawson sbuf_printf(&sb, "%u/%u ", cpu_cx_stats[i].long_slp, 10846b74f9b7SNate Lawson cpu_cx_stats[i].short_slp); 10856b74f9b7SNate Lawson } 10866b74f9b7SNate Lawson sbuf_trim(&sb); 10876b74f9b7SNate Lawson sbuf_finish(&sb); 10886b74f9b7SNate Lawson sysctl_handle_string(oidp, sbuf_data(&sb), 0, req); 10896b74f9b7SNate Lawson 10906b74f9b7SNate Lawson return (0); 10916b74f9b7SNate Lawson } 10926b74f9b7SNate Lawson 10936b74f9b7SNate Lawson static int 10946b74f9b7SNate Lawson acpi_cpu_cx_lowest_sysctl(SYSCTL_HANDLER_ARGS) 10956b74f9b7SNate Lawson { 10966b74f9b7SNate Lawson struct acpi_cpu_softc *sc; 10976b74f9b7SNate Lawson int val, error, i; 10986b74f9b7SNate Lawson 10996b74f9b7SNate Lawson sc = device_get_softc(cpu_devices[0]); 11006b74f9b7SNate Lawson val = cpu_cx_lowest; 11016b74f9b7SNate Lawson error = sysctl_handle_int(oidp, &val, 0, req); 11026b74f9b7SNate Lawson if (error != 0 || req->newptr == NULL) 11036b74f9b7SNate Lawson return (error); 110456a70eadSNate Lawson if (val < 0 || val > cpu_cx_count - 1) 11056b74f9b7SNate Lawson return (EINVAL); 11066b74f9b7SNate Lawson 11076b74f9b7SNate Lawson /* Use the new value for the next idle slice. */ 11086b74f9b7SNate Lawson cpu_cx_lowest = val; 11096b74f9b7SNate Lawson cpu_cx_next = val; 11106b74f9b7SNate Lawson 11116b74f9b7SNate Lawson /* If not disabling, cache the new lowest non-C3 state. */ 11126b74f9b7SNate Lawson cpu_non_c3 = 0; 11136b74f9b7SNate Lawson for (i = cpu_cx_lowest; i >= 0; i--) { 11146b74f9b7SNate Lawson if (sc->cpu_cx_states[i].type < ACPI_STATE_C3) { 11156b74f9b7SNate Lawson cpu_non_c3 = i; 11166b74f9b7SNate Lawson break; 11176b74f9b7SNate Lawson } 11186b74f9b7SNate Lawson } 11196b74f9b7SNate Lawson 11206b74f9b7SNate Lawson /* Reset the statistics counters. */ 11216b74f9b7SNate Lawson memset(cpu_cx_stats, 0, sizeof(cpu_cx_stats)); 11226b74f9b7SNate Lawson 11236b74f9b7SNate Lawson return (0); 11246b74f9b7SNate Lawson } 1125