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> 36fe12f24bSPoul-Henning Kamp #include <sys/module.h> 376b74f9b7SNate Lawson #include <sys/pcpu.h> 3856a70eadSNate Lawson #include <sys/power.h> 3956a70eadSNate Lawson #include <sys/proc.h> 4056a70eadSNate Lawson #include <sys/sbuf.h> 416b74f9b7SNate Lawson #include <sys/smp.h> 42fec754d4SMike Smith 436b74f9b7SNate Lawson #include <dev/pci/pcivar.h> 4456a70eadSNate Lawson #include <machine/atomic.h> 45fec754d4SMike Smith #include <machine/bus.h> 466b74f9b7SNate Lawson #ifdef __ia64__ 476b74f9b7SNate Lawson #include <machine/pal.h> 486b74f9b7SNate Lawson #endif 4956a70eadSNate Lawson #include <sys/rman.h> 50fec754d4SMike Smith 51fec754d4SMike Smith #include "acpi.h" 52fec754d4SMike Smith #include <dev/acpica/acpivar.h> 53fec754d4SMike Smith 54fec754d4SMike Smith /* 556b74f9b7SNate Lawson * Support for ACPI Processor devices, including ACPI 2.0 throttling 566b74f9b7SNate Lawson * and C[1-3] sleep states. 57fec754d4SMike Smith * 586b74f9b7SNate Lawson * TODO: implement scans of all CPUs to be sure all Cx states are 596b74f9b7SNate Lawson * equivalent. 60fec754d4SMike Smith */ 61fec754d4SMike Smith 62be2b1797SNate Lawson /* Hooks for the ACPI CA debugging infrastructure */ 63fec754d4SMike Smith #define _COMPONENT ACPI_PROCESSOR 649127281cSMike Smith ACPI_MODULE_NAME("PROCESSOR") 65fec754d4SMike Smith 666b74f9b7SNate Lawson struct acpi_cx { 676b74f9b7SNate Lawson struct resource *p_lvlx; /* Register to read to enter state. */ 686b74f9b7SNate Lawson uint32_t type; /* C1-3 (C4 and up treated as C3). */ 696b74f9b7SNate Lawson uint32_t trans_lat; /* Transition latency (usec). */ 706b74f9b7SNate Lawson uint32_t power; /* Power consumed (mW). */ 716b74f9b7SNate Lawson }; 726b74f9b7SNate Lawson #define MAX_CX_STATES 8 736b74f9b7SNate Lawson 74fec754d4SMike Smith struct acpi_cpu_softc { 75fec754d4SMike Smith device_t cpu_dev; 76fec754d4SMike Smith ACPI_HANDLE cpu_handle; 77b6426963SNate Lawson uint32_t acpi_id; /* ACPI processor id */ 7856a70eadSNate Lawson uint32_t cpu_p_blk; /* ACPI P_BLK location */ 7956a70eadSNate Lawson uint32_t cpu_p_blk_len; /* P_BLK length (must be 6). */ 806b74f9b7SNate Lawson struct resource *cpu_p_cnt; /* Throttling control register */ 816b74f9b7SNate Lawson struct acpi_cx cpu_cx_states[MAX_CX_STATES]; 8256a70eadSNate Lawson int cpu_cx_count; /* Number of valid Cx states. */ 83a2afe45aSNate Lawson int cpu_prev_sleep;/* Last idle sleep duration. */ 84fec754d4SMike Smith }; 85fec754d4SMike Smith 866b74f9b7SNate Lawson #define CPU_GET_REG(reg, width) \ 876b74f9b7SNate Lawson (bus_space_read_ ## width(rman_get_bustag((reg)), \ 886b74f9b7SNate Lawson rman_get_bushandle((reg)), 0)) 896b74f9b7SNate Lawson #define CPU_SET_REG(reg, width, val) \ 906b74f9b7SNate Lawson (bus_space_write_ ## width(rman_get_bustag((reg)), \ 916b74f9b7SNate Lawson rman_get_bushandle((reg)), 0, (val))) 92be2b1797SNate Lawson 93fec754d4SMike Smith /* 94b279c35aSNate Lawson * Speeds are stored in counts, from 1 to CPU_MAX_SPEED, and 95fec754d4SMike Smith * reported to the user in tenths of a percent. 96fec754d4SMike Smith */ 976b74f9b7SNate Lawson static uint32_t cpu_duty_offset; 986b74f9b7SNate Lawson static uint32_t cpu_duty_width; 99fec754d4SMike Smith #define CPU_MAX_SPEED (1 << cpu_duty_width) 100fec754d4SMike Smith #define CPU_SPEED_PERCENT(x) ((1000 * (x)) / CPU_MAX_SPEED) 1016b74f9b7SNate Lawson #define CPU_SPEED_PRINTABLE(x) (CPU_SPEED_PERCENT(x) / 10), \ 1026b74f9b7SNate Lawson (CPU_SPEED_PERCENT(x) % 10) 1036b74f9b7SNate Lawson #define CPU_P_CNT_THT_EN (1<<4) 1046b74f9b7SNate Lawson #define PM_USEC(x) ((x) >> 2) /* ~4 clocks per usec (3.57955 Mhz) */ 105fec754d4SMike Smith 1066b74f9b7SNate Lawson #define ACPI_CPU_NOTIFY_PERF_STATES 0x80 /* _PSS changed. */ 1076b74f9b7SNate Lawson #define ACPI_CPU_NOTIFY_CX_STATES 0x81 /* _CST changed. */ 108fec754d4SMike Smith 1096b74f9b7SNate Lawson #define CPU_QUIRK_NO_C3 0x0001 /* C3-type states are not usable. */ 1106b74f9b7SNate Lawson #define CPU_QUIRK_NO_THROTTLE 0x0002 /* Throttling is not usable. */ 1116b74f9b7SNate Lawson 1126b74f9b7SNate Lawson #define PCI_VENDOR_INTEL 0x8086 1136b74f9b7SNate Lawson #define PCI_DEVICE_82371AB_3 0x7113 /* PIIX4 chipset for quirks. */ 1146b74f9b7SNate Lawson #define PCI_REVISION_A_STEP 0 1156b74f9b7SNate Lawson #define PCI_REVISION_B_STEP 1 1166b74f9b7SNate Lawson #define PCI_REVISION_4E 2 1176b74f9b7SNate Lawson #define PCI_REVISION_4M 3 1186b74f9b7SNate Lawson 1196b74f9b7SNate Lawson /* Platform hardware resource information. */ 1206b74f9b7SNate Lawson static uint32_t cpu_smi_cmd; /* Value to write to SMI_CMD. */ 1216b74f9b7SNate Lawson static uint8_t cpu_pstate_cnt;/* Register to take over throttling. */ 12256a70eadSNate Lawson static uint8_t cpu_cst_cnt; /* Indicate we are _CST aware. */ 123a2afe45aSNate Lawson static int cpu_rid; /* Driver-wide resource id. */ 124a2afe45aSNate Lawson static int cpu_quirks; /* Indicate any hardware bugs. */ 1256b74f9b7SNate Lawson 1266b74f9b7SNate Lawson /* Runtime state. */ 1276b74f9b7SNate Lawson static int cpu_cx_count; /* Number of valid states */ 128a2afe45aSNate Lawson static int cpu_non_c3; /* Index of lowest non-C3 state. */ 129a2afe45aSNate Lawson static u_int cpu_cx_stats[MAX_CX_STATES];/* Cx usage history. */ 1306b74f9b7SNate Lawson 1316b74f9b7SNate Lawson /* Values for sysctl. */ 1320d8fb61aSNate Lawson static uint32_t cpu_throttle_state; 1330d8fb61aSNate Lawson static uint32_t cpu_throttle_max; 1346b74f9b7SNate Lawson static int cpu_cx_lowest; 1356b74f9b7SNate Lawson static char cpu_cx_supported[64]; 136fec754d4SMike Smith 137fec754d4SMike Smith static device_t *cpu_devices; 138fec754d4SMike Smith static int cpu_ndevices; 139447a5fa1SJohn Baldwin static struct acpi_cpu_softc **cpu_softc; 140d92a2ebdSNate Lawson ACPI_SERIAL_DECL(cpu, "ACPI CPU"); 141fec754d4SMike Smith 142fec754d4SMike Smith static struct sysctl_ctx_list acpi_cpu_sysctl_ctx; 143fec754d4SMike Smith static struct sysctl_oid *acpi_cpu_sysctl_tree; 144fec754d4SMike Smith 145fec754d4SMike Smith static int acpi_cpu_probe(device_t dev); 146fec754d4SMike Smith static int acpi_cpu_attach(device_t dev); 147b6426963SNate Lawson static int acpi_pcpu_get_id(uint32_t idx, uint32_t *acpi_id, 148b6426963SNate Lawson uint32_t *cpu_id); 14956a70eadSNate Lawson static int acpi_cpu_shutdown(device_t dev); 1506b74f9b7SNate Lawson static int acpi_cpu_throttle_probe(struct acpi_cpu_softc *sc); 1516b74f9b7SNate Lawson static int acpi_cpu_cx_probe(struct acpi_cpu_softc *sc); 1526b74f9b7SNate Lawson static int acpi_cpu_cx_cst(struct acpi_cpu_softc *sc); 1536b74f9b7SNate Lawson static void acpi_cpu_startup(void *arg); 1546b74f9b7SNate Lawson static void acpi_cpu_startup_throttling(void); 15556a70eadSNate Lawson static void acpi_cpu_startup_cx(void); 1566b74f9b7SNate Lawson static void acpi_cpu_throttle_set(uint32_t speed); 1576b74f9b7SNate Lawson static void acpi_cpu_idle(void); 1586b74f9b7SNate Lawson static void acpi_cpu_c1(void); 1596b74f9b7SNate Lawson static void acpi_cpu_notify(ACPI_HANDLE h, UINT32 notify, void *context); 1606b74f9b7SNate Lawson static int acpi_cpu_quirks(struct acpi_cpu_softc *sc); 1616b74f9b7SNate Lawson static int acpi_cpu_throttle_sysctl(SYSCTL_HANDLER_ARGS); 162a2afe45aSNate Lawson static int acpi_cpu_usage_sysctl(SYSCTL_HANDLER_ARGS); 1636b74f9b7SNate Lawson static int acpi_cpu_cx_lowest_sysctl(SYSCTL_HANDLER_ARGS); 164fec754d4SMike Smith 165fec754d4SMike Smith static device_method_t acpi_cpu_methods[] = { 166fec754d4SMike Smith /* Device interface */ 167fec754d4SMike Smith DEVMETHOD(device_probe, acpi_cpu_probe), 168fec754d4SMike Smith DEVMETHOD(device_attach, acpi_cpu_attach), 16956a70eadSNate Lawson DEVMETHOD(device_shutdown, acpi_cpu_shutdown), 170fec754d4SMike Smith 171fec754d4SMike Smith {0, 0} 172fec754d4SMike Smith }; 173fec754d4SMike Smith 174fec754d4SMike Smith static driver_t acpi_cpu_driver = { 175b0e2b625SNate Lawson "cpu", 176fec754d4SMike Smith acpi_cpu_methods, 177fec754d4SMike Smith sizeof(struct acpi_cpu_softc), 178fec754d4SMike Smith }; 179fec754d4SMike Smith 1803273b005SMike Smith static devclass_t acpi_cpu_devclass; 181b0e2b625SNate Lawson DRIVER_MODULE(cpu, acpi, acpi_cpu_driver, acpi_cpu_devclass, 0, 0); 182b0e2b625SNate Lawson MODULE_DEPEND(cpu, acpi, 1, 1, 1); 18356a70eadSNate Lawson 184fec754d4SMike Smith static int 185fec754d4SMike Smith acpi_cpu_probe(device_t dev) 186fec754d4SMike Smith { 187b0e2b625SNate Lawson int acpi_id, cpu_id, cx_count; 188b0e2b625SNate Lawson ACPI_BUFFER buf; 189b0e2b625SNate Lawson ACPI_HANDLE handle; 190b0e2b625SNate Lawson char msg[32]; 191b0e2b625SNate Lawson ACPI_OBJECT *obj; 192b0e2b625SNate Lawson ACPI_STATUS status; 193b0e2b625SNate Lawson 194b0e2b625SNate Lawson if (acpi_disabled("cpu") || acpi_get_type(dev) != ACPI_TYPE_PROCESSOR) 195b0e2b625SNate Lawson return (ENXIO); 196b0e2b625SNate Lawson 197b0e2b625SNate Lawson handle = acpi_get_handle(dev); 198447a5fa1SJohn Baldwin if (cpu_softc == NULL) 199447a5fa1SJohn Baldwin cpu_softc = malloc(sizeof(struct acpi_cpu_softc *) * 200447a5fa1SJohn Baldwin (mp_maxid + 1), M_TEMP /* XXX */, M_WAITOK | M_ZERO); 201b0e2b625SNate Lawson 202b0e2b625SNate Lawson /* Get our Processor object. */ 203b0e2b625SNate Lawson buf.Pointer = NULL; 204b0e2b625SNate Lawson buf.Length = ACPI_ALLOCATE_BUFFER; 205b0e2b625SNate Lawson status = AcpiEvaluateObject(handle, NULL, NULL, &buf); 206b0e2b625SNate Lawson if (ACPI_FAILURE(status)) { 207b0e2b625SNate Lawson device_printf(dev, "probe failed to get Processor obj - %s\n", 208b0e2b625SNate Lawson AcpiFormatException(status)); 209b0e2b625SNate Lawson return (ENXIO); 210b0e2b625SNate Lawson } 211b0e2b625SNate Lawson obj = (ACPI_OBJECT *)buf.Pointer; 212b0e2b625SNate Lawson if (obj->Type != ACPI_TYPE_PROCESSOR) { 213b0e2b625SNate Lawson device_printf(dev, "Processor object has bad type %d\n", obj->Type); 214b0e2b625SNate Lawson AcpiOsFree(obj); 215b0e2b625SNate Lawson return (ENXIO); 216fec754d4SMike Smith } 217be2b1797SNate Lawson 218b0e2b625SNate Lawson /* 219b0e2b625SNate Lawson * Find the processor associated with our unit. We could use the 220b0e2b625SNate Lawson * ProcId as a key, however, some boxes do not have the same values 221b0e2b625SNate Lawson * in their Processor object as the ProcId values in the MADT. 222b0e2b625SNate Lawson */ 223b0e2b625SNate Lawson acpi_id = obj->Processor.ProcId; 224b0e2b625SNate Lawson AcpiOsFree(obj); 225b0e2b625SNate Lawson if (acpi_pcpu_get_id(device_get_unit(dev), &acpi_id, &cpu_id) != 0) 226fec754d4SMike Smith return (ENXIO); 227b0e2b625SNate Lawson 228b0e2b625SNate Lawson /* 229b0e2b625SNate Lawson * Check if we already probed this processor. We scan the bus twice 230b0e2b625SNate Lawson * so it's possible we've already seen this one. 231b0e2b625SNate Lawson */ 232b0e2b625SNate Lawson if (cpu_softc[cpu_id] != NULL) 233b0e2b625SNate Lawson return (ENXIO); 234b0e2b625SNate Lawson 235b0e2b625SNate Lawson /* Get a count of Cx states for our device string. */ 236b0e2b625SNate Lawson cx_count = 0; 237b0e2b625SNate Lawson buf.Pointer = NULL; 238b0e2b625SNate Lawson buf.Length = ACPI_ALLOCATE_BUFFER; 239b0e2b625SNate Lawson status = AcpiEvaluateObject(handle, "_CST", NULL, &buf); 240b0e2b625SNate Lawson if (ACPI_SUCCESS(status)) { 241b0e2b625SNate Lawson obj = (ACPI_OBJECT *)buf.Pointer; 242b0e2b625SNate Lawson if (ACPI_PKG_VALID(obj, 2)) 243b0e2b625SNate Lawson acpi_PkgInt32(obj, 0, &cx_count); 244b0e2b625SNate Lawson AcpiOsFree(obj); 245b0e2b625SNate Lawson } else { 246b0e2b625SNate Lawson if (AcpiGbl_FADT->Plvl2Lat <= 100) 247b0e2b625SNate Lawson cx_count++; 248b0e2b625SNate Lawson if (AcpiGbl_FADT->Plvl3Lat <= 1000) 249b0e2b625SNate Lawson cx_count++; 250b0e2b625SNate Lawson if (cx_count > 0) 251b0e2b625SNate Lawson cx_count++; 252b0e2b625SNate Lawson } 253b0e2b625SNate Lawson if (cx_count > 0) 254b0e2b625SNate Lawson snprintf(msg, sizeof(msg), "ACPI CPU (%d Cx states)", cx_count); 255b0e2b625SNate Lawson else 256b0e2b625SNate Lawson strlcpy(msg, "ACPI CPU", sizeof(msg)); 257b0e2b625SNate Lawson device_set_desc_copy(dev, msg); 258b0e2b625SNate Lawson 259b0e2b625SNate Lawson /* Mark this processor as in-use and save our derived id for attach. */ 260b0e2b625SNate Lawson cpu_softc[cpu_id] = (void *)1; 261b0e2b625SNate Lawson acpi_set_magic(dev, cpu_id); 262b0e2b625SNate Lawson 263b0e2b625SNate Lawson return (0); 264fec754d4SMike Smith } 265fec754d4SMike Smith 266fec754d4SMike Smith static int 267fec754d4SMike Smith acpi_cpu_attach(device_t dev) 268fec754d4SMike Smith { 269b0e2b625SNate Lawson ACPI_BUFFER buf; 270b0e2b625SNate Lawson ACPI_OBJECT *obj; 271fec754d4SMike Smith struct acpi_cpu_softc *sc; 272fec754d4SMike Smith struct acpi_softc *acpi_sc; 273fec754d4SMike Smith ACPI_STATUS status; 274b0e2b625SNate Lawson int thr_ret, cx_ret; 275fec754d4SMike Smith 276b4a05238SPeter Wemm ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 277fec754d4SMike Smith 278fec754d4SMike Smith sc = device_get_softc(dev); 279fec754d4SMike Smith sc->cpu_dev = dev; 280fec754d4SMike Smith sc->cpu_handle = acpi_get_handle(dev); 281b0e2b625SNate Lawson cpu_softc[acpi_get_magic(dev)] = sc; 282fec754d4SMike Smith 283b0e2b625SNate Lawson buf.Pointer = NULL; 284b0e2b625SNate Lawson buf.Length = ACPI_ALLOCATE_BUFFER; 2856b74f9b7SNate Lawson status = AcpiEvaluateObject(sc->cpu_handle, NULL, NULL, &buf); 2866b74f9b7SNate Lawson if (ACPI_FAILURE(status)) { 287b0e2b625SNate Lawson device_printf(dev, "attach failed to get Processor obj - %s\n", 2886b74f9b7SNate Lawson AcpiFormatException(status)); 2896b74f9b7SNate Lawson return (ENXIO); 290b0e2b625SNate Lawson } 291b0e2b625SNate Lawson obj = (ACPI_OBJECT *)buf.Pointer; 292b0e2b625SNate Lawson sc->cpu_p_blk = obj->Processor.PblkAddress; 293b0e2b625SNate Lawson sc->cpu_p_blk_len = obj->Processor.PblkLength; 294b0e2b625SNate Lawson sc->acpi_id = obj->Processor.ProcId; 295b0e2b625SNate Lawson AcpiOsFree(obj); 29656a70eadSNate Lawson ACPI_DEBUG_PRINT((ACPI_DB_INFO, "acpi_cpu%d: P_BLK at %#x/%d\n", 29756a70eadSNate Lawson device_get_unit(dev), sc->cpu_p_blk, sc->cpu_p_blk_len)); 2986b74f9b7SNate Lawson 299fec754d4SMike Smith acpi_sc = acpi_device_get_parent_softc(dev); 300fec754d4SMike Smith sysctl_ctx_init(&acpi_cpu_sysctl_ctx); 301fec754d4SMike Smith acpi_cpu_sysctl_tree = SYSCTL_ADD_NODE(&acpi_cpu_sysctl_ctx, 302fec754d4SMike Smith SYSCTL_CHILDREN(acpi_sc->acpi_sysctl_tree), 303fec754d4SMike Smith OID_AUTO, "cpu", CTLFLAG_RD, 0, ""); 304fec754d4SMike Smith 3056b74f9b7SNate Lawson /* If this is the first device probed, check for quirks. */ 3066b74f9b7SNate Lawson if (device_get_unit(dev) == 0) 3076b74f9b7SNate Lawson acpi_cpu_quirks(sc); 3086b74f9b7SNate Lawson 3096b74f9b7SNate Lawson /* 3106b74f9b7SNate Lawson * Probe for throttling and Cx state support. 3116b74f9b7SNate Lawson * If none of these is present, free up unused resources. 3126b74f9b7SNate Lawson */ 3136b74f9b7SNate Lawson thr_ret = acpi_cpu_throttle_probe(sc); 3146b74f9b7SNate Lawson cx_ret = acpi_cpu_cx_probe(sc); 3156b74f9b7SNate Lawson if (thr_ret == 0 || cx_ret == 0) { 3166b74f9b7SNate Lawson status = AcpiInstallNotifyHandler(sc->cpu_handle, ACPI_DEVICE_NOTIFY, 3176b74f9b7SNate Lawson acpi_cpu_notify, sc); 31856a70eadSNate Lawson if (device_get_unit(dev) == 0) 31956a70eadSNate Lawson AcpiOsQueueForExecution(OSD_PRIORITY_LO, acpi_cpu_startup, NULL); 3206b74f9b7SNate Lawson } else { 3216b74f9b7SNate Lawson sysctl_ctx_free(&acpi_cpu_sysctl_ctx); 3226b74f9b7SNate Lawson } 3236b74f9b7SNate Lawson 3246b74f9b7SNate Lawson return_VALUE (0); 3256b74f9b7SNate Lawson } 3266b74f9b7SNate Lawson 327b6426963SNate Lawson /* 328b6426963SNate Lawson * Find the nth present CPU and return its pc_cpuid as well as set the 329b6426963SNate Lawson * pc_acpi_id from the most reliable source. 330b6426963SNate Lawson */ 331b6426963SNate Lawson static int 332b6426963SNate Lawson acpi_pcpu_get_id(uint32_t idx, uint32_t *acpi_id, uint32_t *cpu_id) 333b6426963SNate Lawson { 334b6426963SNate Lawson struct pcpu *pcpu_data; 335b6426963SNate Lawson uint32_t i; 336b6426963SNate Lawson 337b6426963SNate Lawson KASSERT(acpi_id != NULL, ("Null acpi_id")); 338b6426963SNate Lawson KASSERT(cpu_id != NULL, ("Null cpu_id")); 339447a5fa1SJohn Baldwin for (i = 0; i <= mp_maxid; i++) { 340b6426963SNate Lawson if (CPU_ABSENT(i)) 341b6426963SNate Lawson continue; 342b6426963SNate Lawson pcpu_data = pcpu_find(i); 343b6426963SNate Lawson KASSERT(pcpu_data != NULL, ("no pcpu data for %d", i)); 344b6426963SNate Lawson if (idx-- == 0) { 345b6426963SNate Lawson /* 346b6426963SNate Lawson * If pc_acpi_id was not initialized (e.g., a non-APIC UP box) 347b6426963SNate Lawson * override it with the value from the ASL. Otherwise, if the 348b6426963SNate Lawson * two don't match, prefer the MADT-derived value. Finally, 349b6426963SNate Lawson * return the pc_cpuid to reference this processor. 350b6426963SNate Lawson */ 351b6426963SNate Lawson if (pcpu_data->pc_acpi_id == 0xffffffff) 352b6426963SNate Lawson pcpu_data->pc_acpi_id = *acpi_id; 353b6426963SNate Lawson else if (pcpu_data->pc_acpi_id != *acpi_id) 354b6426963SNate Lawson *acpi_id = pcpu_data->pc_acpi_id; 355b6426963SNate Lawson *cpu_id = pcpu_data->pc_cpuid; 356b6426963SNate Lawson return (0); 357b6426963SNate Lawson } 358b6426963SNate Lawson } 359b6426963SNate Lawson 360b6426963SNate Lawson return (ESRCH); 361b6426963SNate Lawson } 362b6426963SNate Lawson 3636b74f9b7SNate Lawson static int 36456a70eadSNate Lawson acpi_cpu_shutdown(device_t dev) 36556a70eadSNate Lawson { 36656a70eadSNate Lawson ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 36756a70eadSNate Lawson 36856a70eadSNate Lawson /* Disable any entry to the idle function. */ 36956a70eadSNate Lawson cpu_cx_count = 0; 37056a70eadSNate Lawson 371a2afe45aSNate Lawson /* Signal and wait for all processors to exit acpi_cpu_idle(). */ 37256a70eadSNate Lawson smp_rendezvous(NULL, NULL, NULL, NULL); 37356a70eadSNate Lawson 37456a70eadSNate Lawson return_VALUE (0); 37556a70eadSNate Lawson } 37656a70eadSNate Lawson 37756a70eadSNate Lawson static int 3786b74f9b7SNate Lawson acpi_cpu_throttle_probe(struct acpi_cpu_softc *sc) 3796b74f9b7SNate Lawson { 3806b74f9b7SNate Lawson uint32_t duty_end; 3816b74f9b7SNate Lawson ACPI_BUFFER buf; 3826b74f9b7SNate Lawson ACPI_OBJECT obj; 3836b74f9b7SNate Lawson ACPI_GENERIC_ADDRESS gas; 3846b74f9b7SNate Lawson ACPI_STATUS status; 3856b74f9b7SNate Lawson 3866b74f9b7SNate Lawson ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 3876b74f9b7SNate Lawson 3886b74f9b7SNate Lawson /* Get throttling parameters from the FADT. 0 means not supported. */ 38956a70eadSNate Lawson if (device_get_unit(sc->cpu_dev) == 0) { 3906b74f9b7SNate Lawson cpu_smi_cmd = AcpiGbl_FADT->SmiCmd; 3916b74f9b7SNate Lawson cpu_pstate_cnt = AcpiGbl_FADT->PstateCnt; 39256a70eadSNate Lawson cpu_cst_cnt = AcpiGbl_FADT->CstCnt; 3936b74f9b7SNate Lawson cpu_duty_offset = AcpiGbl_FADT->DutyOffset; 3946b74f9b7SNate Lawson cpu_duty_width = AcpiGbl_FADT->DutyWidth; 39556a70eadSNate Lawson } 3966b74f9b7SNate Lawson if (cpu_duty_width == 0 || (cpu_quirks & CPU_QUIRK_NO_THROTTLE) != 0) 3976b74f9b7SNate Lawson return (ENXIO); 3986b74f9b7SNate Lawson 3996b74f9b7SNate Lawson /* Validate the duty offset/width. */ 4006b74f9b7SNate Lawson duty_end = cpu_duty_offset + cpu_duty_width - 1; 4016b74f9b7SNate Lawson if (duty_end > 31) { 4026b74f9b7SNate Lawson device_printf(sc->cpu_dev, "CLK_VAL field overflows P_CNT register\n"); 4036b74f9b7SNate Lawson return (ENXIO); 4046b74f9b7SNate Lawson } 4056b74f9b7SNate Lawson if (cpu_duty_offset <= 4 && duty_end >= 4) { 4066b74f9b7SNate Lawson device_printf(sc->cpu_dev, "CLK_VAL field overlaps THT_EN bit\n"); 4076b74f9b7SNate Lawson return (ENXIO); 4086b74f9b7SNate Lawson } 4096b74f9b7SNate Lawson 4106b74f9b7SNate Lawson /* 4116b74f9b7SNate Lawson * If not present, fall back to using the processor's P_BLK to find 4126b74f9b7SNate Lawson * the P_CNT register. 4136b74f9b7SNate Lawson * 4146b74f9b7SNate Lawson * Note that some systems seem to duplicate the P_BLK pointer 4156b74f9b7SNate Lawson * across multiple CPUs, so not getting the resource is not fatal. 4166b74f9b7SNate Lawson */ 4176b74f9b7SNate Lawson buf.Pointer = &obj; 4186b74f9b7SNate Lawson buf.Length = sizeof(obj); 4196b74f9b7SNate Lawson status = AcpiEvaluateObject(sc->cpu_handle, "_PTC", NULL, &buf); 4206b74f9b7SNate Lawson if (ACPI_SUCCESS(status)) { 4216b74f9b7SNate Lawson if (obj.Buffer.Length < sizeof(ACPI_GENERIC_ADDRESS) + 3) { 4226b74f9b7SNate Lawson device_printf(sc->cpu_dev, "_PTC buffer too small\n"); 4236b74f9b7SNate Lawson return (ENXIO); 4246b74f9b7SNate Lawson } 4256b74f9b7SNate Lawson memcpy(&gas, obj.Buffer.Pointer + 3, sizeof(gas)); 4266b74f9b7SNate Lawson sc->cpu_p_cnt = acpi_bus_alloc_gas(sc->cpu_dev, &cpu_rid, &gas); 4276b74f9b7SNate Lawson if (sc->cpu_p_cnt != NULL) { 42856a70eadSNate Lawson ACPI_DEBUG_PRINT((ACPI_DB_INFO, "acpi_cpu%d: P_CNT from _PTC\n", 4296b74f9b7SNate Lawson device_get_unit(sc->cpu_dev))); 4306b74f9b7SNate Lawson } 4316b74f9b7SNate Lawson } 4326b74f9b7SNate Lawson 4336b74f9b7SNate Lawson /* If _PTC not present or other failure, try the P_BLK. */ 4346b74f9b7SNate Lawson if (sc->cpu_p_cnt == NULL) { 435c181b89bSNate Lawson /* 436c181b89bSNate Lawson * The spec says P_BLK must be 6 bytes long. However, some 437c181b89bSNate Lawson * systems use it to indicate a fractional set of features 438c181b89bSNate Lawson * present so we take anything >= 4. 439c181b89bSNate Lawson */ 440c181b89bSNate Lawson if (sc->cpu_p_blk_len < 4) 4416b74f9b7SNate Lawson return (ENXIO); 44256a70eadSNate Lawson gas.Address = sc->cpu_p_blk; 4436b74f9b7SNate Lawson gas.AddressSpaceId = ACPI_ADR_SPACE_SYSTEM_IO; 4446b74f9b7SNate Lawson gas.RegisterBitWidth = 32; 4456b74f9b7SNate Lawson sc->cpu_p_cnt = acpi_bus_alloc_gas(sc->cpu_dev, &cpu_rid, &gas); 4466b74f9b7SNate Lawson if (sc->cpu_p_cnt != NULL) { 44756a70eadSNate Lawson ACPI_DEBUG_PRINT((ACPI_DB_INFO, "acpi_cpu%d: P_CNT from P_BLK\n", 4486b74f9b7SNate Lawson device_get_unit(sc->cpu_dev))); 4496b74f9b7SNate Lawson } else { 4506b74f9b7SNate Lawson device_printf(sc->cpu_dev, "Failed to attach throttling P_CNT\n"); 4516b74f9b7SNate Lawson return (ENXIO); 4526b74f9b7SNate Lawson } 4536b74f9b7SNate Lawson } 4546b74f9b7SNate Lawson cpu_rid++; 4556b74f9b7SNate Lawson 4566b74f9b7SNate Lawson return (0); 457fec754d4SMike Smith } 458fec754d4SMike Smith 4596b74f9b7SNate Lawson static int 4606b74f9b7SNate Lawson acpi_cpu_cx_probe(struct acpi_cpu_softc *sc) 4616b74f9b7SNate Lawson { 4626b74f9b7SNate Lawson ACPI_GENERIC_ADDRESS gas; 4636b74f9b7SNate Lawson struct acpi_cx *cx_ptr; 46456a70eadSNate Lawson int error; 46556a70eadSNate Lawson 46656a70eadSNate Lawson ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 4676b74f9b7SNate Lawson 4686b74f9b7SNate Lawson /* Bus mastering arbitration control is needed for C3. */ 4696b74f9b7SNate Lawson if (AcpiGbl_FADT->V1_Pm2CntBlk == 0 || AcpiGbl_FADT->Pm2CntLen == 0) { 4706b74f9b7SNate Lawson cpu_quirks |= CPU_QUIRK_NO_C3; 47156a70eadSNate Lawson ACPI_DEBUG_PRINT((ACPI_DB_INFO, 47256a70eadSNate Lawson "acpi_cpu%d: No BM control, C3 disabled\n", 47356a70eadSNate Lawson device_get_unit(sc->cpu_dev))); 474fec754d4SMike Smith } 475fec754d4SMike Smith 476fec754d4SMike Smith /* 4776b74f9b7SNate Lawson * First, check for the ACPI 2.0 _CST sleep states object. 4786b74f9b7SNate Lawson * If not usable, fall back to the P_BLK's P_LVL2 and P_LVL3. 479fec754d4SMike Smith */ 48056a70eadSNate Lawson sc->cpu_cx_count = 0; 4816b74f9b7SNate Lawson error = acpi_cpu_cx_cst(sc); 4826b74f9b7SNate Lawson if (error != 0) { 4836b74f9b7SNate Lawson cx_ptr = sc->cpu_cx_states; 484fec754d4SMike Smith 4856b74f9b7SNate Lawson /* C1 has been required since just after ACPI 1.0 */ 4866b74f9b7SNate Lawson cx_ptr->type = ACPI_STATE_C1; 4876b74f9b7SNate Lawson cx_ptr->trans_lat = 0; 4886b74f9b7SNate Lawson cpu_non_c3 = 0; 4896b74f9b7SNate Lawson cx_ptr++; 49056a70eadSNate Lawson sc->cpu_cx_count++; 49156a70eadSNate Lawson 492c181b89bSNate Lawson /* 493c181b89bSNate Lawson * The spec says P_BLK must be 6 bytes long. However, some systems 494c181b89bSNate Lawson * use it to indicate a fractional set of features present so we 495c181b89bSNate Lawson * take 5 as C2. Some may also have a value of 7 to indicate 496c181b89bSNate Lawson * another C3 but most use _CST for this (as required) and having 497c181b89bSNate Lawson * "only" C1-C3 is not a hardship. 498c181b89bSNate Lawson */ 499c181b89bSNate Lawson if (sc->cpu_p_blk_len < 5) 50056a70eadSNate Lawson goto done; 501fec754d4SMike Smith 5026b74f9b7SNate Lawson /* Validate and allocate resources for C2 (P_LVL2). */ 5036b74f9b7SNate Lawson gas.AddressSpaceId = ACPI_ADR_SPACE_SYSTEM_IO; 5046b74f9b7SNate Lawson gas.RegisterBitWidth = 8; 505e5ada020SNate Lawson if (AcpiGbl_FADT->Plvl2Lat <= 100) { 50656a70eadSNate Lawson gas.Address = sc->cpu_p_blk + 4; 5076b74f9b7SNate Lawson cx_ptr->p_lvlx = acpi_bus_alloc_gas(sc->cpu_dev, &cpu_rid, &gas); 5086b74f9b7SNate Lawson if (cx_ptr->p_lvlx != NULL) { 5096b74f9b7SNate Lawson cpu_rid++; 5106b74f9b7SNate Lawson cx_ptr->type = ACPI_STATE_C2; 5116b74f9b7SNate Lawson cx_ptr->trans_lat = AcpiGbl_FADT->Plvl2Lat; 5126b74f9b7SNate Lawson cpu_non_c3 = 1; 5136b74f9b7SNate Lawson cx_ptr++; 51456a70eadSNate Lawson sc->cpu_cx_count++; 515fec754d4SMike Smith } 516fec754d4SMike Smith } 517c181b89bSNate Lawson if (sc->cpu_p_blk_len < 6) 518c181b89bSNate Lawson goto done; 519be2b1797SNate Lawson 5206b74f9b7SNate Lawson /* Validate and allocate resources for C3 (P_LVL3). */ 521e5ada020SNate Lawson if (AcpiGbl_FADT->Plvl3Lat <= 1000 && 5226b74f9b7SNate Lawson (cpu_quirks & CPU_QUIRK_NO_C3) == 0) { 5236b74f9b7SNate Lawson 52456a70eadSNate Lawson gas.Address = sc->cpu_p_blk + 5; 5256b74f9b7SNate Lawson cx_ptr->p_lvlx = acpi_bus_alloc_gas(sc->cpu_dev, &cpu_rid, &gas); 5266b74f9b7SNate Lawson if (cx_ptr->p_lvlx != NULL) { 5276b74f9b7SNate Lawson cpu_rid++; 5286b74f9b7SNate Lawson cx_ptr->type = ACPI_STATE_C3; 5296b74f9b7SNate Lawson cx_ptr->trans_lat = AcpiGbl_FADT->Plvl3Lat; 5306b74f9b7SNate Lawson cx_ptr++; 53156a70eadSNate Lawson sc->cpu_cx_count++; 5326b74f9b7SNate Lawson } 5336b74f9b7SNate Lawson } 5346b74f9b7SNate Lawson } 5356b74f9b7SNate Lawson 53656a70eadSNate Lawson done: 5376b74f9b7SNate Lawson /* If no valid registers were found, don't attach. */ 53856a70eadSNate Lawson if (sc->cpu_cx_count == 0) 5396b74f9b7SNate Lawson return (ENXIO); 5406b74f9b7SNate Lawson 541a2afe45aSNate Lawson /* Use initial sleep value of 1 sec. to start with lowest idle state. */ 542a2afe45aSNate Lawson sc->cpu_prev_sleep = 1000000; 543a2afe45aSNate Lawson 5446b74f9b7SNate Lawson return (0); 5456b74f9b7SNate Lawson } 5466b74f9b7SNate Lawson 5476b74f9b7SNate Lawson /* 5486b74f9b7SNate Lawson * Parse a _CST package and set up its Cx states. Since the _CST object 5496b74f9b7SNate Lawson * can change dynamically, our notify handler may call this function 5506b74f9b7SNate Lawson * to clean up and probe the new _CST package. 5516b74f9b7SNate Lawson */ 5526b74f9b7SNate Lawson static int 5536b74f9b7SNate Lawson acpi_cpu_cx_cst(struct acpi_cpu_softc *sc) 5546b74f9b7SNate Lawson { 5556b74f9b7SNate Lawson struct acpi_cx *cx_ptr; 5566b74f9b7SNate Lawson ACPI_STATUS status; 5576b74f9b7SNate Lawson ACPI_BUFFER buf; 5586b74f9b7SNate Lawson ACPI_OBJECT *top; 5596b74f9b7SNate Lawson ACPI_OBJECT *pkg; 5606b74f9b7SNate Lawson uint32_t count; 5616b74f9b7SNate Lawson int i; 5626b74f9b7SNate Lawson 56356a70eadSNate Lawson ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 56456a70eadSNate Lawson 5656b74f9b7SNate Lawson buf.Pointer = NULL; 5666b74f9b7SNate Lawson buf.Length = ACPI_ALLOCATE_BUFFER; 5676b74f9b7SNate Lawson status = AcpiEvaluateObject(sc->cpu_handle, "_CST", NULL, &buf); 5686b74f9b7SNate Lawson if (ACPI_FAILURE(status)) 5696b74f9b7SNate Lawson return (ENXIO); 5706b74f9b7SNate Lawson 5716b74f9b7SNate Lawson /* _CST is a package with a count and at least one Cx package. */ 5726b74f9b7SNate Lawson top = (ACPI_OBJECT *)buf.Pointer; 57321cea91fSNate Lawson if (!ACPI_PKG_VALID(top, 2) || acpi_PkgInt32(top, 0, &count) != 0) { 5746b74f9b7SNate Lawson device_printf(sc->cpu_dev, "Invalid _CST package\n"); 5756b74f9b7SNate Lawson AcpiOsFree(buf.Pointer); 5766b74f9b7SNate Lawson return (ENXIO); 5776b74f9b7SNate Lawson } 5786b74f9b7SNate Lawson if (count != top->Package.Count - 1) { 5796b74f9b7SNate Lawson device_printf(sc->cpu_dev, "Invalid _CST state count (%d != %d)\n", 5806b74f9b7SNate Lawson count, top->Package.Count - 1); 5816b74f9b7SNate Lawson count = top->Package.Count - 1; 5826b74f9b7SNate Lawson } 5836b74f9b7SNate Lawson if (count > MAX_CX_STATES) { 58456a70eadSNate Lawson device_printf(sc->cpu_dev, "_CST has too many states (%d)\n", count); 5856b74f9b7SNate Lawson count = MAX_CX_STATES; 5866b74f9b7SNate Lawson } 5876b74f9b7SNate Lawson 5886b74f9b7SNate Lawson /* Set up all valid states. */ 58956a70eadSNate Lawson sc->cpu_cx_count = 0; 5906b74f9b7SNate Lawson cx_ptr = sc->cpu_cx_states; 5916b74f9b7SNate Lawson for (i = 0; i < count; i++) { 5926b74f9b7SNate Lawson pkg = &top->Package.Elements[i + 1]; 59321cea91fSNate Lawson if (!ACPI_PKG_VALID(pkg, 4) || 59421cea91fSNate Lawson acpi_PkgInt32(pkg, 1, &cx_ptr->type) != 0 || 59521cea91fSNate Lawson acpi_PkgInt32(pkg, 2, &cx_ptr->trans_lat) != 0 || 59621cea91fSNate Lawson acpi_PkgInt32(pkg, 3, &cx_ptr->power) != 0) { 59721cea91fSNate Lawson 5986b74f9b7SNate Lawson device_printf(sc->cpu_dev, "Skipping invalid Cx state package\n"); 5996b74f9b7SNate Lawson continue; 6006b74f9b7SNate Lawson } 6016b74f9b7SNate Lawson 6026b74f9b7SNate Lawson /* Validate the state to see if we should use it. */ 6036b74f9b7SNate Lawson switch (cx_ptr->type) { 6046b74f9b7SNate Lawson case ACPI_STATE_C1: 6056b74f9b7SNate Lawson cpu_non_c3 = i; 6066b74f9b7SNate Lawson cx_ptr++; 60756a70eadSNate Lawson sc->cpu_cx_count++; 6086b74f9b7SNate Lawson continue; 6096b74f9b7SNate Lawson case ACPI_STATE_C2: 6106b74f9b7SNate Lawson if (cx_ptr->trans_lat > 100) { 61156a70eadSNate Lawson ACPI_DEBUG_PRINT((ACPI_DB_INFO, 61256a70eadSNate Lawson "acpi_cpu%d: C2[%d] not available.\n", 61356a70eadSNate Lawson device_get_unit(sc->cpu_dev), i)); 6146b74f9b7SNate Lawson continue; 6156b74f9b7SNate Lawson } 6166b74f9b7SNate Lawson cpu_non_c3 = i; 6176b74f9b7SNate Lawson break; 6186b74f9b7SNate Lawson case ACPI_STATE_C3: 6196b74f9b7SNate Lawson default: 6206b74f9b7SNate Lawson if (cx_ptr->trans_lat > 1000 || 6216b74f9b7SNate Lawson (cpu_quirks & CPU_QUIRK_NO_C3) != 0) { 6226b74f9b7SNate Lawson 62356a70eadSNate Lawson ACPI_DEBUG_PRINT((ACPI_DB_INFO, 62456a70eadSNate Lawson "acpi_cpu%d: C3[%d] not available.\n", 62556a70eadSNate Lawson device_get_unit(sc->cpu_dev), i)); 6266b74f9b7SNate Lawson continue; 6276b74f9b7SNate Lawson } 6286b74f9b7SNate Lawson break; 6296b74f9b7SNate Lawson } 6306b74f9b7SNate Lawson 6316b74f9b7SNate Lawson #ifdef notyet 6326b74f9b7SNate Lawson /* Free up any previous register. */ 6336b74f9b7SNate Lawson if (cx_ptr->p_lvlx != NULL) { 6346b74f9b7SNate Lawson bus_release_resource(sc->cpu_dev, 0, 0, cx_ptr->p_lvlx); 6356b74f9b7SNate Lawson cx_ptr->p_lvlx = NULL; 6366b74f9b7SNate Lawson } 6376b74f9b7SNate Lawson #endif 6386b74f9b7SNate Lawson 6396b74f9b7SNate Lawson /* Allocate the control register for C2 or C3. */ 6406b74f9b7SNate Lawson acpi_PkgGas(sc->cpu_dev, pkg, 0, &cpu_rid, &cx_ptr->p_lvlx); 6416b74f9b7SNate Lawson if (cx_ptr->p_lvlx != NULL) { 6426b74f9b7SNate Lawson cpu_rid++; 64356a70eadSNate Lawson ACPI_DEBUG_PRINT((ACPI_DB_INFO, 64456a70eadSNate Lawson "acpi_cpu%d: Got C%d - %d latency\n", 64556a70eadSNate Lawson device_get_unit(sc->cpu_dev), cx_ptr->type, 64656a70eadSNate Lawson cx_ptr->trans_lat)); 6476b74f9b7SNate Lawson cx_ptr++; 64856a70eadSNate Lawson sc->cpu_cx_count++; 6496b74f9b7SNate Lawson } 6506b74f9b7SNate Lawson } 6516b74f9b7SNate Lawson AcpiOsFree(buf.Pointer); 6526b74f9b7SNate Lawson 6536b74f9b7SNate Lawson return (0); 654fec754d4SMike Smith } 655fec754d4SMike Smith 656fec754d4SMike Smith /* 657fec754d4SMike Smith * Call this *after* all CPUs have been attached. 658fec754d4SMike Smith */ 659fec754d4SMike Smith static void 6606b74f9b7SNate Lawson acpi_cpu_startup(void *arg) 661fec754d4SMike Smith { 66256a70eadSNate Lawson struct acpi_cpu_softc *sc; 66356a70eadSNate Lawson int count, i; 664fec754d4SMike Smith 665be2b1797SNate Lawson /* Get set of CPU devices */ 666fec754d4SMike Smith devclass_get_devices(acpi_cpu_devclass, &cpu_devices, &cpu_ndevices); 667fec754d4SMike Smith 66856a70eadSNate Lawson /* 66956a70eadSNate Lawson * Make sure all the processors' Cx counts match. We should probably 67056a70eadSNate Lawson * also check the contents of each. However, no known systems have 67156a70eadSNate Lawson * non-matching Cx counts so we'll deal with this later. 67256a70eadSNate Lawson */ 67356a70eadSNate Lawson count = MAX_CX_STATES; 67456a70eadSNate Lawson for (i = 0; i < cpu_ndevices; i++) { 67556a70eadSNate Lawson sc = device_get_softc(cpu_devices[i]); 67656a70eadSNate Lawson count = min(sc->cpu_cx_count, count); 67756a70eadSNate Lawson } 67856a70eadSNate Lawson cpu_cx_count = count; 67956a70eadSNate Lawson 68056a70eadSNate Lawson /* Perform throttling and Cx final initialization. */ 68156a70eadSNate Lawson sc = device_get_softc(cpu_devices[0]); 6826b74f9b7SNate Lawson if (sc->cpu_p_cnt != NULL) 6836b74f9b7SNate Lawson acpi_cpu_startup_throttling(); 68456a70eadSNate Lawson if (cpu_cx_count > 0) 68556a70eadSNate Lawson acpi_cpu_startup_cx(); 6866b74f9b7SNate Lawson } 6876b74f9b7SNate Lawson 68856a70eadSNate Lawson /* 68956a70eadSNate Lawson * Takes the ACPI lock to avoid fighting anyone over the SMI command 69056a70eadSNate Lawson * port. 69156a70eadSNate Lawson */ 6926b74f9b7SNate Lawson static void 6936b74f9b7SNate Lawson acpi_cpu_startup_throttling() 6946b74f9b7SNate Lawson { 6956b74f9b7SNate Lawson 696be2b1797SNate Lawson /* Initialise throttling states */ 6970d8fb61aSNate Lawson cpu_throttle_max = CPU_MAX_SPEED; 6980d8fb61aSNate Lawson cpu_throttle_state = CPU_MAX_SPEED; 699be2b1797SNate Lawson 70056a70eadSNate Lawson SYSCTL_ADD_INT(&acpi_cpu_sysctl_ctx, 70156a70eadSNate Lawson SYSCTL_CHILDREN(acpi_cpu_sysctl_tree), 7020d8fb61aSNate Lawson OID_AUTO, "throttle_max", CTLFLAG_RD, 7030d8fb61aSNate Lawson &cpu_throttle_max, 0, "maximum CPU speed"); 70456a70eadSNate Lawson SYSCTL_ADD_PROC(&acpi_cpu_sysctl_ctx, 70556a70eadSNate Lawson SYSCTL_CHILDREN(acpi_cpu_sysctl_tree), 7060d8fb61aSNate Lawson OID_AUTO, "throttle_state", 7070d8fb61aSNate Lawson CTLTYPE_INT | CTLFLAG_RW, &cpu_throttle_state, 7080d8fb61aSNate Lawson 0, acpi_cpu_throttle_sysctl, "I", "current CPU speed"); 709fec754d4SMike Smith 71056a70eadSNate Lawson /* If ACPI 2.0+, signal platform that we are taking over throttling. */ 711d92a2ebdSNate Lawson if (cpu_pstate_cnt != 0) { 712d92a2ebdSNate Lawson ACPI_LOCK(acpi); 71356a70eadSNate Lawson AcpiOsWritePort(cpu_smi_cmd, cpu_pstate_cnt, 8); 714d92a2ebdSNate Lawson ACPI_UNLOCK(acpi); 715d92a2ebdSNate Lawson } 716fec754d4SMike Smith 7170d8fb61aSNate Lawson /* Set initial speed to maximum. */ 718d92a2ebdSNate Lawson ACPI_SERIAL_BEGIN(cpu); 7190d8fb61aSNate Lawson acpi_cpu_throttle_set(cpu_throttle_max); 720d92a2ebdSNate Lawson ACPI_SERIAL_END(cpu); 721fec754d4SMike Smith 722a40f20c7SNate Lawson printf("acpi_cpu: throttling enabled, %d steps (100%% to %d.%d%%), " 723a40f20c7SNate Lawson "currently %d.%d%%\n", CPU_MAX_SPEED, CPU_SPEED_PRINTABLE(1), 7240d8fb61aSNate Lawson CPU_SPEED_PRINTABLE(cpu_throttle_state)); 725fec754d4SMike Smith } 726fec754d4SMike Smith 72756a70eadSNate Lawson static void 72856a70eadSNate Lawson acpi_cpu_startup_cx() 72956a70eadSNate Lawson { 73056a70eadSNate Lawson struct acpi_cpu_softc *sc; 73156a70eadSNate Lawson struct sbuf sb; 73256a70eadSNate Lawson int i; 73356a70eadSNate Lawson 73456a70eadSNate Lawson sc = device_get_softc(cpu_devices[0]); 73556a70eadSNate Lawson sbuf_new(&sb, cpu_cx_supported, sizeof(cpu_cx_supported), SBUF_FIXEDLEN); 736ccc09458SNate Lawson for (i = 0; i < cpu_cx_count; i++) 737ccc09458SNate Lawson sbuf_printf(&sb, "C%d/%d ", i + 1, sc->cpu_cx_states[i].trans_lat); 73856a70eadSNate Lawson sbuf_trim(&sb); 73956a70eadSNate Lawson sbuf_finish(&sb); 74056a70eadSNate Lawson SYSCTL_ADD_STRING(&acpi_cpu_sysctl_ctx, 74156a70eadSNate Lawson SYSCTL_CHILDREN(acpi_cpu_sysctl_tree), 74256a70eadSNate Lawson OID_AUTO, "cx_supported", CTLFLAG_RD, cpu_cx_supported, 74356a70eadSNate Lawson 0, "Cx/microsecond values for supported Cx states"); 74456a70eadSNate Lawson SYSCTL_ADD_PROC(&acpi_cpu_sysctl_ctx, 74556a70eadSNate Lawson SYSCTL_CHILDREN(acpi_cpu_sysctl_tree), 746ccc09458SNate Lawson OID_AUTO, "cx_lowest", CTLTYPE_STRING | CTLFLAG_RW, 747ccc09458SNate Lawson NULL, 0, acpi_cpu_cx_lowest_sysctl, "A", 74856a70eadSNate Lawson "lowest Cx sleep state to use"); 74956a70eadSNate Lawson SYSCTL_ADD_PROC(&acpi_cpu_sysctl_ctx, 75056a70eadSNate Lawson SYSCTL_CHILDREN(acpi_cpu_sysctl_tree), 751a2afe45aSNate Lawson OID_AUTO, "cx_usage", CTLTYPE_STRING | CTLFLAG_RD, 752a2afe45aSNate Lawson NULL, 0, acpi_cpu_usage_sysctl, "A", 753a2afe45aSNate Lawson "percent usage for each Cx state"); 75456a70eadSNate Lawson 75556a70eadSNate Lawson #ifdef notyet 75656a70eadSNate Lawson /* Signal platform that we can handle _CST notification. */ 75756a70eadSNate Lawson if (cpu_cst_cnt != 0) { 758d92a2ebdSNate Lawson ACPI_LOCK(acpi); 75956a70eadSNate Lawson AcpiOsWritePort(cpu_smi_cmd, cpu_cst_cnt, 8); 760d92a2ebdSNate Lawson ACPI_UNLOCK(acpi); 76156a70eadSNate Lawson } 76256a70eadSNate Lawson #endif 76356a70eadSNate Lawson 76456a70eadSNate Lawson /* Take over idling from cpu_idle_default(). */ 76556a70eadSNate Lawson cpu_idle_hook = acpi_cpu_idle; 76656a70eadSNate Lawson } 76756a70eadSNate Lawson 768fec754d4SMike Smith /* 769fec754d4SMike Smith * Set CPUs to the new state. 770fec754d4SMike Smith * 771fec754d4SMike Smith * Must be called with the ACPI lock held. 772fec754d4SMike Smith */ 773fec754d4SMike Smith static void 7746b74f9b7SNate Lawson acpi_cpu_throttle_set(uint32_t speed) 775fec754d4SMike Smith { 776fec754d4SMike Smith struct acpi_cpu_softc *sc; 777fec754d4SMike Smith int i; 7786b74f9b7SNate Lawson uint32_t p_cnt, clk_val; 779fec754d4SMike Smith 780d92a2ebdSNate Lawson ACPI_SERIAL_ASSERT(cpu); 781fec754d4SMike Smith 782be2b1797SNate Lawson /* Iterate over processors */ 783fec754d4SMike Smith for (i = 0; i < cpu_ndevices; i++) { 784fec754d4SMike Smith sc = device_get_softc(cpu_devices[i]); 7856b74f9b7SNate Lawson if (sc->cpu_p_cnt == NULL) 786fec754d4SMike Smith continue; 787fec754d4SMike Smith 788be2b1797SNate Lawson /* Get the current P_CNT value and disable throttling */ 7896b74f9b7SNate Lawson p_cnt = CPU_GET_REG(sc->cpu_p_cnt, 4); 790fec754d4SMike Smith p_cnt &= ~CPU_P_CNT_THT_EN; 7916b74f9b7SNate Lawson CPU_SET_REG(sc->cpu_p_cnt, 4, p_cnt); 792fec754d4SMike Smith 793be2b1797SNate Lawson /* If we're at maximum speed, that's all */ 794fec754d4SMike Smith if (speed < CPU_MAX_SPEED) { 795be2b1797SNate Lawson /* Mask the old CLK_VAL off and or-in the new value */ 796b279c35aSNate Lawson clk_val = (CPU_MAX_SPEED - 1) << cpu_duty_offset; 797fec754d4SMike Smith p_cnt &= ~clk_val; 798fec754d4SMike Smith p_cnt |= (speed << cpu_duty_offset); 799fec754d4SMike Smith 800be2b1797SNate Lawson /* Write the new P_CNT value and then enable throttling */ 8016b74f9b7SNate Lawson CPU_SET_REG(sc->cpu_p_cnt, 4, p_cnt); 802fec754d4SMike Smith p_cnt |= CPU_P_CNT_THT_EN; 8036b74f9b7SNate Lawson CPU_SET_REG(sc->cpu_p_cnt, 4, p_cnt); 804fec754d4SMike Smith } 8056971b3c7SMitsuru IWASAKI ACPI_VPRINT(sc->cpu_dev, acpi_device_get_parent_softc(sc->cpu_dev), 8066971b3c7SMitsuru IWASAKI "set speed to %d.%d%%\n", CPU_SPEED_PRINTABLE(speed)); 807fec754d4SMike Smith } 8080d8fb61aSNate Lawson cpu_throttle_state = speed; 809fec754d4SMike Smith } 810fec754d4SMike Smith 811fec754d4SMike Smith /* 812a2afe45aSNate Lawson * Idle the CPU in the lowest state possible. This function is called with 813a2afe45aSNate Lawson * interrupts disabled. Note that once it re-enables interrupts, a task 814a2afe45aSNate Lawson * switch can occur so do not access shared data (i.e. the softc) after 815a2afe45aSNate Lawson * interrupts are re-enabled. 8166b74f9b7SNate Lawson */ 8176b74f9b7SNate Lawson static void 8186b74f9b7SNate Lawson acpi_cpu_idle() 8196b74f9b7SNate Lawson { 8206b74f9b7SNate Lawson struct acpi_cpu_softc *sc; 82156a70eadSNate Lawson struct acpi_cx *cx_next; 8226b74f9b7SNate Lawson uint32_t start_time, end_time; 823a2afe45aSNate Lawson int bm_active, cx_next_idx, i; 8246b74f9b7SNate Lawson 8256b74f9b7SNate Lawson /* If disabled, return immediately. */ 82656a70eadSNate Lawson if (cpu_cx_count == 0) { 8276b74f9b7SNate Lawson ACPI_ENABLE_IRQS(); 8286b74f9b7SNate Lawson return; 8296b74f9b7SNate Lawson } 8306b74f9b7SNate Lawson 831cd1f3db9SNate Lawson /* 832cd1f3db9SNate Lawson * Look up our CPU id to get our softc. If it's NULL, we'll use C1 833cd1f3db9SNate Lawson * since there is no ACPI processor object for this CPU. This occurs 834cd1f3db9SNate Lawson * for logical CPUs in the HTT case. 835cd1f3db9SNate Lawson */ 836cd1f3db9SNate Lawson sc = cpu_softc[PCPU_GET(cpuid)]; 837cd1f3db9SNate Lawson if (sc == NULL) { 838cd1f3db9SNate Lawson acpi_cpu_c1(); 839cd1f3db9SNate Lawson return; 840cd1f3db9SNate Lawson } 841cd1f3db9SNate Lawson 842a2afe45aSNate Lawson /* 843a2afe45aSNate Lawson * If we slept 100 us or more, use the lowest Cx state. Otherwise, 844a2afe45aSNate Lawson * find the lowest state that has a latency less than or equal to 845a2afe45aSNate Lawson * the length of our last sleep. 846a2afe45aSNate Lawson */ 847a2afe45aSNate Lawson cx_next_idx = cpu_cx_lowest; 848a2afe45aSNate Lawson if (sc->cpu_prev_sleep < 100) 849a2afe45aSNate Lawson for (i = cpu_cx_lowest; i >= 0; i--) 850a2afe45aSNate Lawson if (sc->cpu_cx_states[i].trans_lat <= sc->cpu_prev_sleep) { 851a2afe45aSNate Lawson cx_next_idx = i; 852a2afe45aSNate Lawson break; 853a2afe45aSNate Lawson } 85456a70eadSNate Lawson 8556b74f9b7SNate Lawson /* 8566b74f9b7SNate Lawson * Check for bus master activity. If there was activity, clear 8576b74f9b7SNate Lawson * the bit and use the lowest non-C3 state. Note that the USB 8586b74f9b7SNate Lawson * driver polling for new devices keeps this bit set all the 859a2afe45aSNate Lawson * time if USB is loaded. 8606b74f9b7SNate Lawson */ 8616b74f9b7SNate Lawson AcpiGetRegister(ACPI_BITREG_BUS_MASTER_STATUS, &bm_active, 8626b74f9b7SNate Lawson ACPI_MTX_DO_NOT_LOCK); 8636b74f9b7SNate Lawson if (bm_active != 0) { 8646b74f9b7SNate Lawson AcpiSetRegister(ACPI_BITREG_BUS_MASTER_STATUS, 1, 8656b74f9b7SNate Lawson ACPI_MTX_DO_NOT_LOCK); 866a2afe45aSNate Lawson cx_next_idx = min(cx_next_idx, cpu_non_c3); 8676b74f9b7SNate Lawson } 8686b74f9b7SNate Lawson 869a2afe45aSNate Lawson /* Select the next state and update statistics. */ 870a2afe45aSNate Lawson cx_next = &sc->cpu_cx_states[cx_next_idx]; 871a2afe45aSNate Lawson cpu_cx_stats[cx_next_idx]++; 872a2afe45aSNate Lawson KASSERT(cx_next->type != ACPI_STATE_C0, ("acpi_cpu_idle: C0 sleep")); 8736b74f9b7SNate Lawson 8746b74f9b7SNate Lawson /* 875a2afe45aSNate Lawson * Execute HLT (or equivalent) and wait for an interrupt. We can't 876a2afe45aSNate Lawson * calculate the time spent in C1 since the place we wake up is an 877a2afe45aSNate Lawson * ISR. Assume we slept one quantum and return. 8786b74f9b7SNate Lawson */ 879a2afe45aSNate Lawson if (cx_next->type == ACPI_STATE_C1) { 880a2afe45aSNate Lawson sc->cpu_prev_sleep = 1000000 / hz; 881a2afe45aSNate Lawson acpi_cpu_c1(); 882a2afe45aSNate Lawson return; 883a2afe45aSNate Lawson } 884a2afe45aSNate Lawson 885a2afe45aSNate Lawson /* For C3, disable bus master arbitration and enable bus master wake. */ 886a2afe45aSNate Lawson if (cx_next->type == ACPI_STATE_C3) { 887a2afe45aSNate Lawson AcpiSetRegister(ACPI_BITREG_ARB_DISABLE, 1, ACPI_MTX_DO_NOT_LOCK); 888a2afe45aSNate Lawson AcpiSetRegister(ACPI_BITREG_BUS_MASTER_RLD, 1, ACPI_MTX_DO_NOT_LOCK); 889a2afe45aSNate Lawson } 890a2afe45aSNate Lawson 8916b74f9b7SNate Lawson /* 892a2afe45aSNate Lawson * Read from P_LVLx to enter C2(+), checking time spent asleep. 8936b74f9b7SNate Lawson * Use the ACPI timer for measuring sleep time. Since we need to 8946b74f9b7SNate Lawson * get the time very close to the CPU start/stop clock logic, this 8956b74f9b7SNate Lawson * is the only reliable time source. 8966b74f9b7SNate Lawson */ 8976b74f9b7SNate Lawson AcpiHwLowLevelRead(32, &start_time, &AcpiGbl_FADT->XPmTmrBlk); 8986b74f9b7SNate Lawson CPU_GET_REG(cx_next->p_lvlx, 1); 8996b74f9b7SNate Lawson 9006b74f9b7SNate Lawson /* 9016b74f9b7SNate Lawson * Read the end time twice. Since it may take an arbitrary time 9026b74f9b7SNate Lawson * to enter the idle state, the first read may be executed before 9036b74f9b7SNate Lawson * the processor has stopped. Doing it again provides enough 9046b74f9b7SNate Lawson * margin that we are certain to have a correct value. 9056b74f9b7SNate Lawson */ 9066b74f9b7SNate Lawson AcpiHwLowLevelRead(32, &end_time, &AcpiGbl_FADT->XPmTmrBlk); 9076b74f9b7SNate Lawson AcpiHwLowLevelRead(32, &end_time, &AcpiGbl_FADT->XPmTmrBlk); 9086b74f9b7SNate Lawson 9096b74f9b7SNate Lawson /* Enable bus master arbitration and disable bus master wakeup. */ 910a2afe45aSNate Lawson if (cx_next->type == ACPI_STATE_C3) { 9116b74f9b7SNate Lawson AcpiSetRegister(ACPI_BITREG_ARB_DISABLE, 0, ACPI_MTX_DO_NOT_LOCK); 9126b74f9b7SNate Lawson AcpiSetRegister(ACPI_BITREG_BUS_MASTER_RLD, 0, ACPI_MTX_DO_NOT_LOCK); 9136b74f9b7SNate Lawson } 9146b74f9b7SNate Lawson 9156b74f9b7SNate Lawson /* Find the actual time asleep in microseconds, minus overhead. */ 916eea17c34SNate Lawson end_time = acpi_TimerDelta(end_time, start_time); 917a2afe45aSNate Lawson sc->cpu_prev_sleep = PM_USEC(end_time) - cx_next->trans_lat; 918a2afe45aSNate Lawson ACPI_ENABLE_IRQS(); 9196b74f9b7SNate Lawson } 9206b74f9b7SNate Lawson 9216b74f9b7SNate Lawson /* Put the CPU in C1 in a machine-dependant way. */ 9226b74f9b7SNate Lawson static void 9236b74f9b7SNate Lawson acpi_cpu_c1() 9246b74f9b7SNate Lawson { 9256b74f9b7SNate Lawson #ifdef __ia64__ 9266b74f9b7SNate Lawson ia64_call_pal_static(PAL_HALT_LIGHT, 0, 0, 0); 9276b74f9b7SNate Lawson #else 9286b74f9b7SNate Lawson __asm __volatile("sti; hlt"); 9296b74f9b7SNate Lawson #endif 9306b74f9b7SNate Lawson } 9316b74f9b7SNate Lawson 9326b74f9b7SNate Lawson /* 9336b74f9b7SNate Lawson * Re-evaluate the _PSS and _CST objects when we are notified that they 9346b74f9b7SNate Lawson * have changed. 93556a70eadSNate Lawson * 9366b74f9b7SNate Lawson * XXX Re-evaluation disabled until locking is done. 9376b74f9b7SNate Lawson */ 9386b74f9b7SNate Lawson static void 9396b74f9b7SNate Lawson acpi_cpu_notify(ACPI_HANDLE h, UINT32 notify, void *context) 9406b74f9b7SNate Lawson { 9416b74f9b7SNate Lawson struct acpi_cpu_softc *sc = (struct acpi_cpu_softc *)context; 9426b74f9b7SNate Lawson 9436b74f9b7SNate Lawson switch (notify) { 9446b74f9b7SNate Lawson case ACPI_CPU_NOTIFY_PERF_STATES: 9456b74f9b7SNate Lawson device_printf(sc->cpu_dev, "Performance states changed\n"); 9466b74f9b7SNate Lawson /* acpi_cpu_px_available(sc); */ 9476b74f9b7SNate Lawson break; 9486b74f9b7SNate Lawson case ACPI_CPU_NOTIFY_CX_STATES: 9496b74f9b7SNate Lawson device_printf(sc->cpu_dev, "Cx states changed\n"); 9506b74f9b7SNate Lawson /* acpi_cpu_cx_cst(sc); */ 9516b74f9b7SNate Lawson break; 9526b74f9b7SNate Lawson default: 9536b74f9b7SNate Lawson device_printf(sc->cpu_dev, "Unknown notify %#x\n", notify); 9546b74f9b7SNate Lawson break; 9556b74f9b7SNate Lawson } 9566b74f9b7SNate Lawson } 9576b74f9b7SNate Lawson 9586b74f9b7SNate Lawson static int 9596b74f9b7SNate Lawson acpi_cpu_quirks(struct acpi_cpu_softc *sc) 9606b74f9b7SNate Lawson { 9616b74f9b7SNate Lawson 9626b74f9b7SNate Lawson /* 9636b74f9b7SNate Lawson * C3 is not supported on multiple CPUs since this would require 9646b74f9b7SNate Lawson * flushing all caches which is currently too expensive. 9656b74f9b7SNate Lawson */ 966447a5fa1SJohn Baldwin if (mp_ncpus > 1) 9676b74f9b7SNate Lawson cpu_quirks |= CPU_QUIRK_NO_C3; 9686b74f9b7SNate Lawson 9696b74f9b7SNate Lawson #ifdef notyet 9706b74f9b7SNate Lawson /* Look for various quirks of the PIIX4 part. */ 9716b74f9b7SNate Lawson acpi_dev = pci_find_device(PCI_VENDOR_INTEL, PCI_DEVICE_82371AB_3); 9726b74f9b7SNate Lawson if (acpi_dev != NULL) { 9736b74f9b7SNate Lawson switch (pci_get_revid(acpi_dev)) { 9746b74f9b7SNate Lawson /* 9756b74f9b7SNate Lawson * Disable throttling control on PIIX4 A and B-step. 9766b74f9b7SNate Lawson * See specification changes #13 ("Manual Throttle Duty Cycle") 9776b74f9b7SNate Lawson * and #14 ("Enabling and Disabling Manual Throttle"), plus 9786b74f9b7SNate Lawson * erratum #5 ("STPCLK# Deassertion Time") from the January 9796b74f9b7SNate Lawson * 2002 PIIX4 specification update. Note that few (if any) 9806b74f9b7SNate Lawson * mobile systems ever used this part. 9816b74f9b7SNate Lawson */ 9826b74f9b7SNate Lawson case PCI_REVISION_A_STEP: 9836b74f9b7SNate Lawson case PCI_REVISION_B_STEP: 9846b74f9b7SNate Lawson cpu_quirks |= CPU_QUIRK_NO_THROTTLE; 9856b74f9b7SNate Lawson /* FALLTHROUGH */ 9866b74f9b7SNate Lawson /* 9876b74f9b7SNate Lawson * Disable C3 support for all PIIX4 chipsets. Some of these parts 9886b74f9b7SNate Lawson * do not report the BMIDE status to the BM status register and 9896b74f9b7SNate Lawson * others have a livelock bug if Type-F DMA is enabled. Linux 9906b74f9b7SNate Lawson * works around the BMIDE bug by reading the BM status directly 9916b74f9b7SNate Lawson * but we take the simpler approach of disabling C3 for these 9926b74f9b7SNate Lawson * parts. 9936b74f9b7SNate Lawson * 9946b74f9b7SNate Lawson * See erratum #18 ("C3 Power State/BMIDE and Type-F DMA 9956b74f9b7SNate Lawson * Livelock") from the January 2002 PIIX4 specification update. 9966b74f9b7SNate Lawson * Applies to all PIIX4 models. 9976b74f9b7SNate Lawson */ 9986b74f9b7SNate Lawson case PCI_REVISION_4E: 9996b74f9b7SNate Lawson case PCI_REVISION_4M: 10006b74f9b7SNate Lawson cpu_quirks |= CPU_QUIRK_NO_C3; 10016b74f9b7SNate Lawson break; 10026b74f9b7SNate Lawson default: 10036b74f9b7SNate Lawson break; 10046b74f9b7SNate Lawson } 10056b74f9b7SNate Lawson } 10066b74f9b7SNate Lawson #endif 10076b74f9b7SNate Lawson 10086b74f9b7SNate Lawson return (0); 10096b74f9b7SNate Lawson } 10106b74f9b7SNate Lawson 10110d8fb61aSNate Lawson /* Handle changes in the CPU throttling setting. */ 1012fec754d4SMike Smith static int 10136b74f9b7SNate Lawson acpi_cpu_throttle_sysctl(SYSCTL_HANDLER_ARGS) 1014fec754d4SMike Smith { 10156b74f9b7SNate Lawson uint32_t *argp; 10166b74f9b7SNate Lawson uint32_t arg; 1017fec754d4SMike Smith int error; 1018fec754d4SMike Smith 10196b74f9b7SNate Lawson argp = (uint32_t *)oidp->oid_arg1; 1020fec754d4SMike Smith arg = *argp; 1021fec754d4SMike Smith error = sysctl_handle_int(oidp, &arg, 0, req); 1022fec754d4SMike Smith 1023be2b1797SNate Lawson /* Error or no new value */ 1024be2b1797SNate Lawson if (error != 0 || req->newptr == NULL) 1025fec754d4SMike Smith return (error); 10260d8fb61aSNate Lawson if (arg < 1 || arg > cpu_throttle_max) 1027fec754d4SMike Smith return (EINVAL); 1028fec754d4SMike Smith 10290d8fb61aSNate Lawson /* If throttling changed, notify the BIOS of the new rate. */ 1030d92a2ebdSNate Lawson ACPI_SERIAL_BEGIN(cpu); 10310d8fb61aSNate Lawson if (*argp != arg) { 1032fec754d4SMike Smith *argp = arg; 10330d8fb61aSNate Lawson acpi_cpu_throttle_set(arg); 10340d8fb61aSNate Lawson } 1035d92a2ebdSNate Lawson ACPI_SERIAL_END(cpu); 1036fec754d4SMike Smith 1037fec754d4SMike Smith return (0); 1038fec754d4SMike Smith } 10396b74f9b7SNate Lawson 10406b74f9b7SNate Lawson static int 1041a2afe45aSNate Lawson acpi_cpu_usage_sysctl(SYSCTL_HANDLER_ARGS) 10426b74f9b7SNate Lawson { 10436b74f9b7SNate Lawson struct sbuf sb; 10446b74f9b7SNate Lawson char buf[128]; 10456b74f9b7SNate Lawson int i; 10464a03551dSNate Lawson uintmax_t fract, sum, whole; 10476b74f9b7SNate Lawson 10483e7fa136SNate Lawson sum = 0; 1049a2afe45aSNate Lawson for (i = 0; i < cpu_cx_count; i++) 1050a2afe45aSNate Lawson sum += cpu_cx_stats[i]; 10516b74f9b7SNate Lawson sbuf_new(&sb, buf, sizeof(buf), SBUF_FIXEDLEN); 10523e7fa136SNate Lawson for (i = 0; i < cpu_cx_count; i++) { 10533e7fa136SNate Lawson if (sum > 0) { 10544a03551dSNate Lawson whole = (uintmax_t)cpu_cx_stats[i] * 100; 10553e7fa136SNate Lawson fract = (whole % sum) * 100; 10563e7fa136SNate Lawson sbuf_printf(&sb, "%u.%02u%% ", (u_int)(whole / sum), 10573e7fa136SNate Lawson (u_int)(fract / sum)); 10583e7fa136SNate Lawson } else 10593e7fa136SNate Lawson sbuf_printf(&sb, "0%% "); 10603e7fa136SNate Lawson } 10616b74f9b7SNate Lawson sbuf_trim(&sb); 10626b74f9b7SNate Lawson sbuf_finish(&sb); 1063ccc09458SNate Lawson sysctl_handle_string(oidp, sbuf_data(&sb), sbuf_len(&sb), req); 1064ccc09458SNate Lawson sbuf_delete(&sb); 10656b74f9b7SNate Lawson 10666b74f9b7SNate Lawson return (0); 10676b74f9b7SNate Lawson } 10686b74f9b7SNate Lawson 10696b74f9b7SNate Lawson static int 10706b74f9b7SNate Lawson acpi_cpu_cx_lowest_sysctl(SYSCTL_HANDLER_ARGS) 10716b74f9b7SNate Lawson { 10726b74f9b7SNate Lawson struct acpi_cpu_softc *sc; 1073ccc09458SNate Lawson char state[8]; 10746b74f9b7SNate Lawson int val, error, i; 10756b74f9b7SNate Lawson 10766b74f9b7SNate Lawson sc = device_get_softc(cpu_devices[0]); 1077ccc09458SNate Lawson snprintf(state, sizeof(state), "C%d", cpu_cx_lowest + 1); 1078ccc09458SNate Lawson error = sysctl_handle_string(oidp, state, sizeof(state), req); 10796b74f9b7SNate Lawson if (error != 0 || req->newptr == NULL) 10806b74f9b7SNate Lawson return (error); 1081ccc09458SNate Lawson if (strlen(state) < 2 || toupper(state[0]) != 'C') 1082ccc09458SNate Lawson return (EINVAL); 1083ccc09458SNate Lawson val = (int) strtol(state + 1, NULL, 10) - 1; 108456a70eadSNate Lawson if (val < 0 || val > cpu_cx_count - 1) 10856b74f9b7SNate Lawson return (EINVAL); 10866b74f9b7SNate Lawson 1087d92a2ebdSNate Lawson ACPI_SERIAL_BEGIN(cpu); 10886b74f9b7SNate Lawson cpu_cx_lowest = val; 10896b74f9b7SNate Lawson 10906b74f9b7SNate Lawson /* If not disabling, cache the new lowest non-C3 state. */ 10916b74f9b7SNate Lawson cpu_non_c3 = 0; 10926b74f9b7SNate Lawson for (i = cpu_cx_lowest; i >= 0; i--) { 10936b74f9b7SNate Lawson if (sc->cpu_cx_states[i].type < ACPI_STATE_C3) { 10946b74f9b7SNate Lawson cpu_non_c3 = i; 10956b74f9b7SNate Lawson break; 10966b74f9b7SNate Lawson } 10976b74f9b7SNate Lawson } 10986b74f9b7SNate Lawson 10996b74f9b7SNate Lawson /* Reset the statistics counters. */ 1100a2afe45aSNate Lawson bzero(cpu_cx_stats, sizeof(cpu_cx_stats)); 1101d92a2ebdSNate Lawson ACPI_SERIAL_END(cpu); 11026b74f9b7SNate Lawson 11036b74f9b7SNate Lawson return (0); 11046b74f9b7SNate Lawson } 1105