1fec754d4SMike Smith /*- 298aa9cd0SNate Lawson * Copyright (c) 2003-2005 Nate Lawson (SDG) 3fec754d4SMike Smith * Copyright (c) 2001 Michael Smith 4fec754d4SMike Smith * All rights reserved. 5fec754d4SMike Smith * 6fec754d4SMike Smith * Redistribution and use in source and binary forms, with or without 7fec754d4SMike Smith * modification, are permitted provided that the following conditions 8fec754d4SMike Smith * are met: 9fec754d4SMike Smith * 1. Redistributions of source code must retain the above copyright 10fec754d4SMike Smith * notice, this list of conditions and the following disclaimer. 11fec754d4SMike Smith * 2. Redistributions in binary form must reproduce the above copyright 12fec754d4SMike Smith * notice, this list of conditions and the following disclaimer in the 13fec754d4SMike Smith * documentation and/or other materials provided with the distribution. 14fec754d4SMike Smith * 15fec754d4SMike Smith * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16fec754d4SMike Smith * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17fec754d4SMike Smith * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18fec754d4SMike Smith * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19fec754d4SMike Smith * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20fec754d4SMike Smith * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21fec754d4SMike Smith * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22fec754d4SMike Smith * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23fec754d4SMike Smith * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24fec754d4SMike Smith * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25fec754d4SMike Smith * SUCH DAMAGE. 26fec754d4SMike Smith */ 27fec754d4SMike Smith 28aad970f1SDavid E. O'Brien #include <sys/cdefs.h> 29aad970f1SDavid E. O'Brien __FBSDID("$FreeBSD$"); 30aad970f1SDavid E. O'Brien 31fec754d4SMike Smith #include "opt_acpi.h" 32fec754d4SMike Smith #include <sys/param.h> 33fec754d4SMike Smith #include <sys/bus.h> 3498aa9cd0SNate Lawson #include <sys/cpu.h> 3556a70eadSNate Lawson #include <sys/kernel.h> 36447a5fa1SJohn Baldwin #include <sys/malloc.h> 37fe12f24bSPoul-Henning Kamp #include <sys/module.h> 386b74f9b7SNate Lawson #include <sys/pcpu.h> 3956a70eadSNate Lawson #include <sys/power.h> 4056a70eadSNate Lawson #include <sys/proc.h> 4156a70eadSNate Lawson #include <sys/sbuf.h> 426b74f9b7SNate Lawson #include <sys/smp.h> 43fec754d4SMike Smith 446b74f9b7SNate Lawson #include <dev/pci/pcivar.h> 4556a70eadSNate Lawson #include <machine/atomic.h> 46fec754d4SMike Smith #include <machine/bus.h> 4756a70eadSNate Lawson #include <sys/rman.h> 48fec754d4SMike Smith 492a191126SDavid E. O'Brien #include <contrib/dev/acpica/acpi.h> 50fec754d4SMike Smith #include <dev/acpica/acpivar.h> 51fec754d4SMike Smith 52fec754d4SMike Smith /* 538c5468e3SNate Lawson * Support for ACPI Processor devices, including C[1-3] sleep states. 54fec754d4SMike Smith */ 55fec754d4SMike Smith 56be2b1797SNate Lawson /* Hooks for the ACPI CA debugging infrastructure */ 57fec754d4SMike Smith #define _COMPONENT ACPI_PROCESSOR 589127281cSMike Smith ACPI_MODULE_NAME("PROCESSOR") 59fec754d4SMike Smith 606b74f9b7SNate Lawson struct acpi_cx { 616b74f9b7SNate Lawson struct resource *p_lvlx; /* Register to read to enter state. */ 626b74f9b7SNate Lawson uint32_t type; /* C1-3 (C4 and up treated as C3). */ 636b74f9b7SNate Lawson uint32_t trans_lat; /* Transition latency (usec). */ 646b74f9b7SNate Lawson uint32_t power; /* Power consumed (mW). */ 65f4eb0418SNate Lawson int res_type; /* Resource type for p_lvlx. */ 666b74f9b7SNate Lawson }; 676b74f9b7SNate Lawson #define MAX_CX_STATES 8 686b74f9b7SNate Lawson 69fec754d4SMike Smith struct acpi_cpu_softc { 70fec754d4SMike Smith device_t cpu_dev; 71fec754d4SMike Smith ACPI_HANDLE cpu_handle; 7298aa9cd0SNate Lawson struct pcpu *cpu_pcpu; 7398aa9cd0SNate Lawson uint32_t cpu_acpi_id; /* ACPI processor id */ 7456a70eadSNate Lawson uint32_t cpu_p_blk; /* ACPI P_BLK location */ 7556a70eadSNate Lawson uint32_t cpu_p_blk_len; /* P_BLK length (must be 6). */ 766b74f9b7SNate Lawson struct acpi_cx cpu_cx_states[MAX_CX_STATES]; 7756a70eadSNate Lawson int cpu_cx_count; /* Number of valid Cx states. */ 78a2afe45aSNate Lawson int cpu_prev_sleep;/* Last idle sleep duration. */ 79b29224c2SNate Lawson int cpu_features; /* Child driver supported features. */ 80907b6777SNate Lawson /* Runtime state. */ 81907b6777SNate Lawson int cpu_non_c3; /* Index of lowest non-C3 state. */ 82907b6777SNate Lawson int cpu_short_slp; /* Count of < 1us sleeps. */ 83907b6777SNate Lawson u_int cpu_cx_stats[MAX_CX_STATES];/* Cx usage history. */ 84907b6777SNate Lawson /* Values for sysctl. */ 85907b6777SNate Lawson struct sysctl_ctx_list cpu_sysctl_ctx; 86907b6777SNate Lawson struct sysctl_oid *cpu_sysctl_tree; 87907b6777SNate Lawson int cpu_cx_lowest; 88907b6777SNate Lawson char cpu_cx_supported[64]; 89907b6777SNate Lawson int cpu_rid; 90fec754d4SMike Smith }; 91fec754d4SMike Smith 9298aa9cd0SNate Lawson struct acpi_cpu_device { 9398aa9cd0SNate Lawson struct resource_list ad_rl; 9498aa9cd0SNate Lawson }; 9598aa9cd0SNate Lawson 966b74f9b7SNate Lawson #define CPU_GET_REG(reg, width) \ 976b74f9b7SNate Lawson (bus_space_read_ ## width(rman_get_bustag((reg)), \ 986b74f9b7SNate Lawson rman_get_bushandle((reg)), 0)) 996b74f9b7SNate Lawson #define CPU_SET_REG(reg, width, val) \ 1006b74f9b7SNate Lawson (bus_space_write_ ## width(rman_get_bustag((reg)), \ 1016b74f9b7SNate Lawson rman_get_bushandle((reg)), 0, (val))) 102be2b1797SNate Lawson 1036b74f9b7SNate Lawson #define PM_USEC(x) ((x) >> 2) /* ~4 clocks per usec (3.57955 Mhz) */ 104fec754d4SMike Smith 1058b888c66SNate Lawson #define ACPI_NOTIFY_CX_STATES 0x81 /* _CST changed. */ 106fec754d4SMike Smith 10718ececa0SNate Lawson #define CPU_QUIRK_NO_C3 (1<<0) /* C3-type states are not usable. */ 10818ececa0SNate Lawson #define CPU_QUIRK_NO_BM_CTRL (1<<2) /* No bus mastering control. */ 1096b74f9b7SNate Lawson 1106b74f9b7SNate Lawson #define PCI_VENDOR_INTEL 0x8086 1116b74f9b7SNate Lawson #define PCI_DEVICE_82371AB_3 0x7113 /* PIIX4 chipset for quirks. */ 1126b74f9b7SNate Lawson #define PCI_REVISION_A_STEP 0 1136b74f9b7SNate Lawson #define PCI_REVISION_B_STEP 1 1146b74f9b7SNate Lawson #define PCI_REVISION_4E 2 1156b74f9b7SNate Lawson #define PCI_REVISION_4M 3 1166b74f9b7SNate Lawson 1176b74f9b7SNate Lawson /* Platform hardware resource information. */ 1186b74f9b7SNate Lawson static uint32_t cpu_smi_cmd; /* Value to write to SMI_CMD. */ 11956a70eadSNate Lawson static uint8_t cpu_cst_cnt; /* Indicate we are _CST aware. */ 120a2afe45aSNate Lawson static int cpu_quirks; /* Indicate any hardware bugs. */ 1216b74f9b7SNate Lawson 1226b74f9b7SNate Lawson /* Runtime state. */ 123907b6777SNate Lawson static int cpu_disable_idle; /* Disable entry to idle function */ 124907b6777SNate Lawson static int cpu_cx_count; /* Number of valid Cx states */ 1256b74f9b7SNate Lawson 1266b74f9b7SNate Lawson /* Values for sysctl. */ 127907b6777SNate Lawson static struct sysctl_ctx_list cpu_sysctl_ctx; 128907b6777SNate Lawson static struct sysctl_oid *cpu_sysctl_tree; 129907b6777SNate Lawson static int cpu_cx_generic; 1306b74f9b7SNate Lawson static int cpu_cx_lowest; 131fec754d4SMike Smith 132fec754d4SMike Smith static device_t *cpu_devices; 133fec754d4SMike Smith static int cpu_ndevices; 134447a5fa1SJohn Baldwin static struct acpi_cpu_softc **cpu_softc; 135d92a2ebdSNate Lawson ACPI_SERIAL_DECL(cpu, "ACPI CPU"); 136fec754d4SMike Smith 137fec754d4SMike Smith static int acpi_cpu_probe(device_t dev); 138fec754d4SMike Smith static int acpi_cpu_attach(device_t dev); 139b6426963SNate Lawson static int acpi_pcpu_get_id(uint32_t idx, uint32_t *acpi_id, 140b6426963SNate Lawson uint32_t *cpu_id); 14198aa9cd0SNate Lawson static struct resource_list *acpi_cpu_get_rlist(device_t dev, device_t child); 14298aa9cd0SNate Lawson static device_t acpi_cpu_add_child(device_t dev, int order, const char *name, 14398aa9cd0SNate Lawson int unit); 14498aa9cd0SNate Lawson static int acpi_cpu_read_ivar(device_t dev, device_t child, int index, 14598aa9cd0SNate Lawson uintptr_t *result); 14656a70eadSNate Lawson static int acpi_cpu_shutdown(device_t dev); 147907b6777SNate Lawson static void acpi_cpu_cx_probe(struct acpi_cpu_softc *sc); 148907b6777SNate Lawson static void acpi_cpu_generic_cx_probe(struct acpi_cpu_softc *sc); 1496b74f9b7SNate Lawson static int acpi_cpu_cx_cst(struct acpi_cpu_softc *sc); 1506b74f9b7SNate Lawson static void acpi_cpu_startup(void *arg); 151907b6777SNate Lawson static void acpi_cpu_startup_cx(struct acpi_cpu_softc *sc); 1526b74f9b7SNate Lawson static void acpi_cpu_idle(void); 1536b74f9b7SNate Lawson static void acpi_cpu_notify(ACPI_HANDLE h, UINT32 notify, void *context); 154907b6777SNate Lawson static int acpi_cpu_quirks(void); 155a2afe45aSNate Lawson static int acpi_cpu_usage_sysctl(SYSCTL_HANDLER_ARGS); 1566b74f9b7SNate Lawson static int acpi_cpu_cx_lowest_sysctl(SYSCTL_HANDLER_ARGS); 157907b6777SNate Lawson static int acpi_cpu_global_cx_lowest_sysctl(SYSCTL_HANDLER_ARGS); 158fec754d4SMike Smith 159fec754d4SMike Smith static device_method_t acpi_cpu_methods[] = { 160fec754d4SMike Smith /* Device interface */ 161fec754d4SMike Smith DEVMETHOD(device_probe, acpi_cpu_probe), 162fec754d4SMike Smith DEVMETHOD(device_attach, acpi_cpu_attach), 16398aa9cd0SNate Lawson DEVMETHOD(device_detach, bus_generic_detach), 16456a70eadSNate Lawson DEVMETHOD(device_shutdown, acpi_cpu_shutdown), 16598aa9cd0SNate Lawson DEVMETHOD(device_suspend, bus_generic_suspend), 16698aa9cd0SNate Lawson DEVMETHOD(device_resume, bus_generic_resume), 16798aa9cd0SNate Lawson 16898aa9cd0SNate Lawson /* Bus interface */ 16998aa9cd0SNate Lawson DEVMETHOD(bus_add_child, acpi_cpu_add_child), 17098aa9cd0SNate Lawson DEVMETHOD(bus_read_ivar, acpi_cpu_read_ivar), 17198aa9cd0SNate Lawson DEVMETHOD(bus_get_resource_list, acpi_cpu_get_rlist), 17298aa9cd0SNate Lawson DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource), 17398aa9cd0SNate Lawson DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource), 17498aa9cd0SNate Lawson DEVMETHOD(bus_alloc_resource, bus_generic_rl_alloc_resource), 17598aa9cd0SNate Lawson DEVMETHOD(bus_release_resource, bus_generic_rl_release_resource), 17698aa9cd0SNate Lawson DEVMETHOD(bus_driver_added, bus_generic_driver_added), 17798aa9cd0SNate Lawson DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 17898aa9cd0SNate Lawson DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 17998aa9cd0SNate Lawson DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 18098aa9cd0SNate Lawson DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 181fec754d4SMike Smith 182fec754d4SMike Smith {0, 0} 183fec754d4SMike Smith }; 184fec754d4SMike Smith 185fec754d4SMike Smith static driver_t acpi_cpu_driver = { 186b0e2b625SNate Lawson "cpu", 187fec754d4SMike Smith acpi_cpu_methods, 188fec754d4SMike Smith sizeof(struct acpi_cpu_softc), 189fec754d4SMike Smith }; 190fec754d4SMike Smith 1913045c8afSNate Lawson static devclass_t acpi_cpu_devclass; 1923045c8afSNate Lawson DRIVER_MODULE(cpu, acpi, acpi_cpu_driver, acpi_cpu_devclass, 0, 0); 193b0e2b625SNate Lawson MODULE_DEPEND(cpu, acpi, 1, 1, 1); 19456a70eadSNate Lawson 195fec754d4SMike Smith static int 196fec754d4SMike Smith acpi_cpu_probe(device_t dev) 197fec754d4SMike Smith { 198b29224c2SNate Lawson int acpi_id, cpu_id; 199b0e2b625SNate Lawson ACPI_BUFFER buf; 200b0e2b625SNate Lawson ACPI_HANDLE handle; 201b0e2b625SNate Lawson ACPI_OBJECT *obj; 202b0e2b625SNate Lawson ACPI_STATUS status; 203b0e2b625SNate Lawson 204b0e2b625SNate Lawson if (acpi_disabled("cpu") || acpi_get_type(dev) != ACPI_TYPE_PROCESSOR) 205b0e2b625SNate Lawson return (ENXIO); 206b0e2b625SNate Lawson 207b0e2b625SNate Lawson handle = acpi_get_handle(dev); 208447a5fa1SJohn Baldwin if (cpu_softc == NULL) 209447a5fa1SJohn Baldwin cpu_softc = malloc(sizeof(struct acpi_cpu_softc *) * 210447a5fa1SJohn Baldwin (mp_maxid + 1), M_TEMP /* XXX */, M_WAITOK | M_ZERO); 211b0e2b625SNate Lawson 212b0e2b625SNate Lawson /* Get our Processor object. */ 213b0e2b625SNate Lawson buf.Pointer = NULL; 214b0e2b625SNate Lawson buf.Length = ACPI_ALLOCATE_BUFFER; 215b0e2b625SNate Lawson status = AcpiEvaluateObject(handle, NULL, NULL, &buf); 216b0e2b625SNate Lawson if (ACPI_FAILURE(status)) { 217b0e2b625SNate Lawson device_printf(dev, "probe failed to get Processor obj - %s\n", 218b0e2b625SNate Lawson AcpiFormatException(status)); 219b0e2b625SNate Lawson return (ENXIO); 220b0e2b625SNate Lawson } 221b0e2b625SNate Lawson obj = (ACPI_OBJECT *)buf.Pointer; 222b0e2b625SNate Lawson if (obj->Type != ACPI_TYPE_PROCESSOR) { 223b0e2b625SNate Lawson device_printf(dev, "Processor object has bad type %d\n", obj->Type); 224b0e2b625SNate Lawson AcpiOsFree(obj); 225b0e2b625SNate Lawson return (ENXIO); 226fec754d4SMike Smith } 227be2b1797SNate Lawson 228b0e2b625SNate Lawson /* 229b0e2b625SNate Lawson * Find the processor associated with our unit. We could use the 230b0e2b625SNate Lawson * ProcId as a key, however, some boxes do not have the same values 231b0e2b625SNate Lawson * in their Processor object as the ProcId values in the MADT. 232b0e2b625SNate Lawson */ 233b0e2b625SNate Lawson acpi_id = obj->Processor.ProcId; 234b0e2b625SNate Lawson AcpiOsFree(obj); 235b0e2b625SNate Lawson if (acpi_pcpu_get_id(device_get_unit(dev), &acpi_id, &cpu_id) != 0) 236fec754d4SMike Smith return (ENXIO); 237b0e2b625SNate Lawson 238b0e2b625SNate Lawson /* 239b0e2b625SNate Lawson * Check if we already probed this processor. We scan the bus twice 240b0e2b625SNate Lawson * so it's possible we've already seen this one. 241b0e2b625SNate Lawson */ 242b0e2b625SNate Lawson if (cpu_softc[cpu_id] != NULL) 243b0e2b625SNate Lawson return (ENXIO); 244b0e2b625SNate Lawson 245b0e2b625SNate Lawson /* Mark this processor as in-use and save our derived id for attach. */ 246b0e2b625SNate Lawson cpu_softc[cpu_id] = (void *)1; 247b0e2b625SNate Lawson acpi_set_magic(dev, cpu_id); 248b29224c2SNate Lawson device_set_desc(dev, "ACPI CPU"); 249b0e2b625SNate Lawson 250b0e2b625SNate Lawson return (0); 251fec754d4SMike Smith } 252fec754d4SMike Smith 253fec754d4SMike Smith static int 254fec754d4SMike Smith acpi_cpu_attach(device_t dev) 255fec754d4SMike Smith { 256b0e2b625SNate Lawson ACPI_BUFFER buf; 257bce92885SNate Lawson ACPI_OBJECT arg, *obj; 258bce92885SNate Lawson ACPI_OBJECT_LIST arglist; 25998aa9cd0SNate Lawson struct pcpu *pcpu_data; 260fec754d4SMike Smith struct acpi_cpu_softc *sc; 261fec754d4SMike Smith struct acpi_softc *acpi_sc; 262fec754d4SMike Smith ACPI_STATUS status; 263b29224c2SNate Lawson u_int features; 264b29224c2SNate Lawson int cpu_id, drv_count, i; 265b29224c2SNate Lawson driver_t **drivers; 266bce92885SNate Lawson uint32_t cap_set[3]; 267fec754d4SMike Smith 268b4a05238SPeter Wemm ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 269fec754d4SMike Smith 270fec754d4SMike Smith sc = device_get_softc(dev); 271fec754d4SMike Smith sc->cpu_dev = dev; 272fec754d4SMike Smith sc->cpu_handle = acpi_get_handle(dev); 27398aa9cd0SNate Lawson cpu_id = acpi_get_magic(dev); 27498aa9cd0SNate Lawson cpu_softc[cpu_id] = sc; 27598aa9cd0SNate Lawson pcpu_data = pcpu_find(cpu_id); 27698aa9cd0SNate Lawson pcpu_data->pc_device = dev; 27798aa9cd0SNate Lawson sc->cpu_pcpu = pcpu_data; 2788c5468e3SNate Lawson cpu_smi_cmd = AcpiGbl_FADT->SmiCmd; 2798c5468e3SNate Lawson cpu_cst_cnt = AcpiGbl_FADT->CstCnt; 280fec754d4SMike Smith 281b0e2b625SNate Lawson buf.Pointer = NULL; 282b0e2b625SNate Lawson buf.Length = ACPI_ALLOCATE_BUFFER; 2836b74f9b7SNate Lawson status = AcpiEvaluateObject(sc->cpu_handle, NULL, NULL, &buf); 2846b74f9b7SNate Lawson if (ACPI_FAILURE(status)) { 285b0e2b625SNate Lawson device_printf(dev, "attach failed to get Processor obj - %s\n", 2866b74f9b7SNate Lawson AcpiFormatException(status)); 2876b74f9b7SNate Lawson return (ENXIO); 288b0e2b625SNate Lawson } 289b0e2b625SNate Lawson obj = (ACPI_OBJECT *)buf.Pointer; 290b0e2b625SNate Lawson sc->cpu_p_blk = obj->Processor.PblkAddress; 291b0e2b625SNate Lawson sc->cpu_p_blk_len = obj->Processor.PblkLength; 29298aa9cd0SNate Lawson sc->cpu_acpi_id = obj->Processor.ProcId; 293b0e2b625SNate Lawson AcpiOsFree(obj); 29456a70eadSNate Lawson ACPI_DEBUG_PRINT((ACPI_DB_INFO, "acpi_cpu%d: P_BLK at %#x/%d\n", 29556a70eadSNate Lawson device_get_unit(dev), sc->cpu_p_blk, sc->cpu_p_blk_len)); 2966b74f9b7SNate Lawson 297907b6777SNate Lawson /* 298907b6777SNate Lawson * If this is the first cpu we attach, create and initialize the generic 299907b6777SNate Lawson * resources that will be used by all acpi cpu devices. 300907b6777SNate Lawson */ 301907b6777SNate Lawson if (device_get_unit(dev) == 0) { 302907b6777SNate Lawson /* Assume we won't be using generic Cx mode by default */ 303907b6777SNate Lawson cpu_cx_generic = FALSE; 304907b6777SNate Lawson 305907b6777SNate Lawson /* Install hw.acpi.cpu sysctl tree */ 306fec754d4SMike Smith acpi_sc = acpi_device_get_parent_softc(dev); 307907b6777SNate Lawson sysctl_ctx_init(&cpu_sysctl_ctx); 308907b6777SNate Lawson cpu_sysctl_tree = SYSCTL_ADD_NODE(&cpu_sysctl_ctx, 30998aa9cd0SNate Lawson SYSCTL_CHILDREN(acpi_sc->acpi_sysctl_tree), OID_AUTO, "cpu", 310907b6777SNate Lawson CTLFLAG_RD, 0, "node for CPU children"); 311907b6777SNate Lawson 312907b6777SNate Lawson /* Queue post cpu-probing task handler */ 313907b6777SNate Lawson AcpiOsQueueForExecution(OSD_PRIORITY_LO, acpi_cpu_startup, NULL); 314907b6777SNate Lawson } 315fec754d4SMike Smith 3166b74f9b7SNate Lawson /* 317b29224c2SNate Lawson * Before calling any CPU methods, collect child driver feature hints 318f2d94257SNate Lawson * and notify ACPI of them. We support unified SMP power control 319f2d94257SNate Lawson * so advertise this ourselves. Note this is not the same as independent 320f2d94257SNate Lawson * SMP control where each CPU can have different settings. 321b29224c2SNate Lawson */ 322f2d94257SNate Lawson sc->cpu_features = ACPI_CAP_SMP_SAME | ACPI_CAP_SMP_SAME_C3; 323b29224c2SNate Lawson if (devclass_get_drivers(acpi_cpu_devclass, &drivers, &drv_count) == 0) { 324b29224c2SNate Lawson for (i = 0; i < drv_count; i++) { 325b29224c2SNate Lawson if (ACPI_GET_FEATURES(drivers[i], &features) == 0) 326b29224c2SNate Lawson sc->cpu_features |= features; 327b29224c2SNate Lawson } 328b29224c2SNate Lawson free(drivers, M_TEMP); 329b29224c2SNate Lawson } 330bce92885SNate Lawson 331bce92885SNate Lawson /* 332bce92885SNate Lawson * CPU capabilities are specified as a buffer of 32-bit integers: 333bce92885SNate Lawson * revision, count, and one or more capabilities. The revision of 334bce92885SNate Lawson * "1" is not specified anywhere but seems to match Linux. We should 335bce92885SNate Lawson * also support _OSC here. 336bce92885SNate Lawson */ 337bce92885SNate Lawson if (sc->cpu_features) { 338bce92885SNate Lawson arglist.Pointer = &arg; 339bce92885SNate Lawson arglist.Count = 1; 340bce92885SNate Lawson arg.Type = ACPI_TYPE_BUFFER; 341bce92885SNate Lawson arg.Buffer.Length = sizeof(cap_set); 342bce92885SNate Lawson arg.Buffer.Pointer = (uint8_t *)cap_set; 343bce92885SNate Lawson cap_set[0] = 1; /* revision */ 344bce92885SNate Lawson cap_set[1] = 1; /* number of capabilities integers */ 345bce92885SNate Lawson cap_set[2] = sc->cpu_features; 346bce92885SNate Lawson AcpiEvaluateObject(sc->cpu_handle, "_PDC", &arglist, NULL); 347bce92885SNate Lawson } 348b29224c2SNate Lawson 349907b6777SNate Lawson /* Probe for Cx state support. */ 350907b6777SNate Lawson acpi_cpu_cx_probe(sc); 3516b74f9b7SNate Lawson 352b29224c2SNate Lawson /* Finally, call identify and probe/attach for child devices. */ 35398aa9cd0SNate Lawson bus_generic_probe(dev); 35498aa9cd0SNate Lawson bus_generic_attach(dev); 35598aa9cd0SNate Lawson 35698aa9cd0SNate Lawson return (0); 3576b74f9b7SNate Lawson } 3586b74f9b7SNate Lawson 359b6426963SNate Lawson /* 360b6426963SNate Lawson * Find the nth present CPU and return its pc_cpuid as well as set the 361b6426963SNate Lawson * pc_acpi_id from the most reliable source. 362b6426963SNate Lawson */ 363b6426963SNate Lawson static int 364b6426963SNate Lawson acpi_pcpu_get_id(uint32_t idx, uint32_t *acpi_id, uint32_t *cpu_id) 365b6426963SNate Lawson { 366b6426963SNate Lawson struct pcpu *pcpu_data; 367b6426963SNate Lawson uint32_t i; 368b6426963SNate Lawson 369b6426963SNate Lawson KASSERT(acpi_id != NULL, ("Null acpi_id")); 370b6426963SNate Lawson KASSERT(cpu_id != NULL, ("Null cpu_id")); 371447a5fa1SJohn Baldwin for (i = 0; i <= mp_maxid; i++) { 372b6426963SNate Lawson if (CPU_ABSENT(i)) 373b6426963SNate Lawson continue; 374b6426963SNate Lawson pcpu_data = pcpu_find(i); 375b6426963SNate Lawson KASSERT(pcpu_data != NULL, ("no pcpu data for %d", i)); 376b6426963SNate Lawson if (idx-- == 0) { 377b6426963SNate Lawson /* 378b6426963SNate Lawson * If pc_acpi_id was not initialized (e.g., a non-APIC UP box) 379b6426963SNate Lawson * override it with the value from the ASL. Otherwise, if the 380b6426963SNate Lawson * two don't match, prefer the MADT-derived value. Finally, 381b6426963SNate Lawson * return the pc_cpuid to reference this processor. 382b6426963SNate Lawson */ 383b6426963SNate Lawson if (pcpu_data->pc_acpi_id == 0xffffffff) 384b6426963SNate Lawson pcpu_data->pc_acpi_id = *acpi_id; 385b6426963SNate Lawson else if (pcpu_data->pc_acpi_id != *acpi_id) 386b6426963SNate Lawson *acpi_id = pcpu_data->pc_acpi_id; 387b6426963SNate Lawson *cpu_id = pcpu_data->pc_cpuid; 388b6426963SNate Lawson return (0); 389b6426963SNate Lawson } 390b6426963SNate Lawson } 391b6426963SNate Lawson 392b6426963SNate Lawson return (ESRCH); 393b6426963SNate Lawson } 394b6426963SNate Lawson 39598aa9cd0SNate Lawson static struct resource_list * 39698aa9cd0SNate Lawson acpi_cpu_get_rlist(device_t dev, device_t child) 39798aa9cd0SNate Lawson { 39898aa9cd0SNate Lawson struct acpi_cpu_device *ad; 39998aa9cd0SNate Lawson 40098aa9cd0SNate Lawson ad = device_get_ivars(child); 40198aa9cd0SNate Lawson if (ad == NULL) 40298aa9cd0SNate Lawson return (NULL); 40398aa9cd0SNate Lawson return (&ad->ad_rl); 40498aa9cd0SNate Lawson } 40598aa9cd0SNate Lawson 40698aa9cd0SNate Lawson static device_t 40798aa9cd0SNate Lawson acpi_cpu_add_child(device_t dev, int order, const char *name, int unit) 40898aa9cd0SNate Lawson { 40998aa9cd0SNate Lawson struct acpi_cpu_device *ad; 41098aa9cd0SNate Lawson device_t child; 41198aa9cd0SNate Lawson 41298aa9cd0SNate Lawson if ((ad = malloc(sizeof(*ad), M_TEMP, M_NOWAIT | M_ZERO)) == NULL) 41398aa9cd0SNate Lawson return (NULL); 41498aa9cd0SNate Lawson 41598aa9cd0SNate Lawson resource_list_init(&ad->ad_rl); 41698aa9cd0SNate Lawson 41798aa9cd0SNate Lawson child = device_add_child_ordered(dev, order, name, unit); 41898aa9cd0SNate Lawson if (child != NULL) 41998aa9cd0SNate Lawson device_set_ivars(child, ad); 42043ce1c77SNate Lawson else 42143ce1c77SNate Lawson free(ad, M_TEMP); 42298aa9cd0SNate Lawson return (child); 42398aa9cd0SNate Lawson } 42498aa9cd0SNate Lawson 42598aa9cd0SNate Lawson static int 42698aa9cd0SNate Lawson acpi_cpu_read_ivar(device_t dev, device_t child, int index, uintptr_t *result) 42798aa9cd0SNate Lawson { 42898aa9cd0SNate Lawson struct acpi_cpu_softc *sc; 42998aa9cd0SNate Lawson 43098aa9cd0SNate Lawson sc = device_get_softc(dev); 43198aa9cd0SNate Lawson switch (index) { 43298aa9cd0SNate Lawson case ACPI_IVAR_HANDLE: 43398aa9cd0SNate Lawson *result = (uintptr_t)sc->cpu_handle; 43498aa9cd0SNate Lawson break; 43598aa9cd0SNate Lawson case CPU_IVAR_PCPU: 43698aa9cd0SNate Lawson *result = (uintptr_t)sc->cpu_pcpu; 43798aa9cd0SNate Lawson break; 43898aa9cd0SNate Lawson default: 43998aa9cd0SNate Lawson return (ENOENT); 44098aa9cd0SNate Lawson } 44198aa9cd0SNate Lawson return (0); 44298aa9cd0SNate Lawson } 44398aa9cd0SNate Lawson 4446b74f9b7SNate Lawson static int 44556a70eadSNate Lawson acpi_cpu_shutdown(device_t dev) 44656a70eadSNate Lawson { 44756a70eadSNate Lawson ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 44856a70eadSNate Lawson 44998aa9cd0SNate Lawson /* Allow children to shutdown first. */ 45098aa9cd0SNate Lawson bus_generic_shutdown(dev); 45198aa9cd0SNate Lawson 45256a70eadSNate Lawson /* Disable any entry to the idle function. */ 453907b6777SNate Lawson cpu_disable_idle = TRUE; 45456a70eadSNate Lawson 455a2afe45aSNate Lawson /* Signal and wait for all processors to exit acpi_cpu_idle(). */ 45656a70eadSNate Lawson smp_rendezvous(NULL, NULL, NULL, NULL); 45756a70eadSNate Lawson 45856a70eadSNate Lawson return_VALUE (0); 45956a70eadSNate Lawson } 46056a70eadSNate Lawson 461907b6777SNate Lawson static void 4626b74f9b7SNate Lawson acpi_cpu_cx_probe(struct acpi_cpu_softc *sc) 4636b74f9b7SNate Lawson { 464907b6777SNate Lawson ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 465907b6777SNate Lawson 466907b6777SNate Lawson /* Use initial sleep value of 1 sec. to start with lowest idle state. */ 467907b6777SNate Lawson sc->cpu_prev_sleep = 1000000; 468907b6777SNate Lawson sc->cpu_cx_lowest = 0; 469907b6777SNate Lawson 470907b6777SNate Lawson /* 471907b6777SNate Lawson * Check for the ACPI 2.0 _CST sleep states object. If we can't find 472907b6777SNate Lawson * any, we'll revert to generic FADT/P_BLK Cx control method which will 473907b6777SNate Lawson * be handled by acpi_cpu_startup. We need to defer to after having 474907b6777SNate Lawson * probed all the cpus in the system before probing for generic Cx 475907b6777SNate Lawson * states as we may already have found cpus with valid _CST packages 476907b6777SNate Lawson */ 477907b6777SNate Lawson if (!cpu_cx_generic && acpi_cpu_cx_cst(sc) != 0) { 478907b6777SNate Lawson /* 479907b6777SNate Lawson * We were unable to find a _CST package for this cpu or there 480907b6777SNate Lawson * was an error parsing it. Switch back to generic mode. 481907b6777SNate Lawson */ 482907b6777SNate Lawson cpu_cx_generic = TRUE; 483907b6777SNate Lawson device_printf(sc->cpu_dev, "Switching to generic Cx mode\n"); 484907b6777SNate Lawson } 485907b6777SNate Lawson 486907b6777SNate Lawson /* 487907b6777SNate Lawson * TODO: _CSD Package should be checked here. 488907b6777SNate Lawson */ 489907b6777SNate Lawson } 490907b6777SNate Lawson 491907b6777SNate Lawson static void 492907b6777SNate Lawson acpi_cpu_generic_cx_probe(struct acpi_cpu_softc *sc) 493907b6777SNate Lawson { 4946b74f9b7SNate Lawson ACPI_GENERIC_ADDRESS gas; 4956b74f9b7SNate Lawson struct acpi_cx *cx_ptr; 49656a70eadSNate Lawson 49756a70eadSNate Lawson sc->cpu_cx_count = 0; 4986b74f9b7SNate Lawson cx_ptr = sc->cpu_cx_states; 499fec754d4SMike Smith 500907b6777SNate Lawson /* Use initial sleep value of 1 sec. to start with lowest idle state. */ 501907b6777SNate Lawson sc->cpu_prev_sleep = 1000000; 502907b6777SNate Lawson 5036b74f9b7SNate Lawson /* C1 has been required since just after ACPI 1.0 */ 5046b74f9b7SNate Lawson cx_ptr->type = ACPI_STATE_C1; 5056b74f9b7SNate Lawson cx_ptr->trans_lat = 0; 5066b74f9b7SNate Lawson cx_ptr++; 50756a70eadSNate Lawson sc->cpu_cx_count++; 50856a70eadSNate Lawson 509c181b89bSNate Lawson /* 510c181b89bSNate Lawson * The spec says P_BLK must be 6 bytes long. However, some systems 511c181b89bSNate Lawson * use it to indicate a fractional set of features present so we 512c181b89bSNate Lawson * take 5 as C2. Some may also have a value of 7 to indicate 513c181b89bSNate Lawson * another C3 but most use _CST for this (as required) and having 514c181b89bSNate Lawson * "only" C1-C3 is not a hardship. 515c181b89bSNate Lawson */ 516c181b89bSNate Lawson if (sc->cpu_p_blk_len < 5) 517907b6777SNate Lawson return; 518fec754d4SMike Smith 5196b74f9b7SNate Lawson /* Validate and allocate resources for C2 (P_LVL2). */ 5206b74f9b7SNate Lawson gas.AddressSpaceId = ACPI_ADR_SPACE_SYSTEM_IO; 5216b74f9b7SNate Lawson gas.RegisterBitWidth = 8; 522e5ada020SNate Lawson if (AcpiGbl_FADT->Plvl2Lat <= 100) { 52356a70eadSNate Lawson gas.Address = sc->cpu_p_blk + 4; 524907b6777SNate Lawson acpi_bus_alloc_gas(sc->cpu_dev, &cx_ptr->res_type, &sc->cpu_rid, 525907b6777SNate Lawson &gas, &cx_ptr->p_lvlx, RF_SHAREABLE); 5266b74f9b7SNate Lawson if (cx_ptr->p_lvlx != NULL) { 527907b6777SNate Lawson sc->cpu_rid++; 5286b74f9b7SNate Lawson cx_ptr->type = ACPI_STATE_C2; 5296b74f9b7SNate Lawson cx_ptr->trans_lat = AcpiGbl_FADT->Plvl2Lat; 5306b74f9b7SNate Lawson cx_ptr++; 53156a70eadSNate Lawson sc->cpu_cx_count++; 532fec754d4SMike Smith } 533fec754d4SMike Smith } 534c181b89bSNate Lawson if (sc->cpu_p_blk_len < 6) 535907b6777SNate Lawson return; 536be2b1797SNate Lawson 5376b74f9b7SNate Lawson /* Validate and allocate resources for C3 (P_LVL3). */ 538907b6777SNate Lawson if (AcpiGbl_FADT->Plvl3Lat <= 1000) { 53956a70eadSNate Lawson gas.Address = sc->cpu_p_blk + 5; 540907b6777SNate Lawson acpi_bus_alloc_gas(sc->cpu_dev, &cx_ptr->res_type, &sc->cpu_rid, &gas, 541907b6777SNate Lawson &cx_ptr->p_lvlx, RF_SHAREABLE); 5426b74f9b7SNate Lawson if (cx_ptr->p_lvlx != NULL) { 543907b6777SNate Lawson sc->cpu_rid++; 5446b74f9b7SNate Lawson cx_ptr->type = ACPI_STATE_C3; 5456b74f9b7SNate Lawson cx_ptr->trans_lat = AcpiGbl_FADT->Plvl3Lat; 5466b74f9b7SNate Lawson cx_ptr++; 54756a70eadSNate Lawson sc->cpu_cx_count++; 5486b74f9b7SNate Lawson } 5496b74f9b7SNate Lawson } 5506b74f9b7SNate Lawson 551907b6777SNate Lawson /* Update the largest cx_count seen so far */ 552907b6777SNate Lawson if (sc->cpu_cx_count > cpu_cx_count) 553907b6777SNate Lawson cpu_cx_count = sc->cpu_cx_count; 5546b74f9b7SNate Lawson } 5556b74f9b7SNate Lawson 5566b74f9b7SNate Lawson /* 5576b74f9b7SNate Lawson * Parse a _CST package and set up its Cx states. Since the _CST object 5586b74f9b7SNate Lawson * can change dynamically, our notify handler may call this function 5596b74f9b7SNate Lawson * to clean up and probe the new _CST package. 5606b74f9b7SNate Lawson */ 5616b74f9b7SNate Lawson static int 5626b74f9b7SNate Lawson acpi_cpu_cx_cst(struct acpi_cpu_softc *sc) 5636b74f9b7SNate Lawson { 5646b74f9b7SNate Lawson struct acpi_cx *cx_ptr; 5656b74f9b7SNate Lawson ACPI_STATUS status; 5666b74f9b7SNate Lawson ACPI_BUFFER buf; 5676b74f9b7SNate Lawson ACPI_OBJECT *top; 5686b74f9b7SNate Lawson ACPI_OBJECT *pkg; 5696b74f9b7SNate Lawson uint32_t count; 5706b74f9b7SNate Lawson int i; 5716b74f9b7SNate Lawson 57256a70eadSNate Lawson ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 57356a70eadSNate Lawson 5746b74f9b7SNate Lawson buf.Pointer = NULL; 5756b74f9b7SNate Lawson buf.Length = ACPI_ALLOCATE_BUFFER; 5766b74f9b7SNate Lawson status = AcpiEvaluateObject(sc->cpu_handle, "_CST", NULL, &buf); 577907b6777SNate Lawson if (ACPI_FAILURE(status)) { 578907b6777SNate Lawson device_printf(sc->cpu_dev, "Unable to find _CST method\n"); 5796b74f9b7SNate Lawson return (ENXIO); 580907b6777SNate Lawson } 5816b74f9b7SNate Lawson 5826b74f9b7SNate Lawson /* _CST is a package with a count and at least one Cx package. */ 5836b74f9b7SNate Lawson top = (ACPI_OBJECT *)buf.Pointer; 58421cea91fSNate Lawson if (!ACPI_PKG_VALID(top, 2) || acpi_PkgInt32(top, 0, &count) != 0) { 5856b74f9b7SNate Lawson device_printf(sc->cpu_dev, "Invalid _CST package\n"); 5866b74f9b7SNate Lawson AcpiOsFree(buf.Pointer); 5876b74f9b7SNate Lawson return (ENXIO); 5886b74f9b7SNate Lawson } 5896b74f9b7SNate Lawson if (count != top->Package.Count - 1) { 5906b74f9b7SNate Lawson device_printf(sc->cpu_dev, "Invalid _CST state count (%d != %d)\n", 5916b74f9b7SNate Lawson count, top->Package.Count - 1); 5926b74f9b7SNate Lawson count = top->Package.Count - 1; 5936b74f9b7SNate Lawson } 5946b74f9b7SNate Lawson if (count > MAX_CX_STATES) { 59556a70eadSNate Lawson device_printf(sc->cpu_dev, "_CST has too many states (%d)\n", count); 5966b74f9b7SNate Lawson count = MAX_CX_STATES; 5976b74f9b7SNate Lawson } 5986b74f9b7SNate Lawson 5996b74f9b7SNate Lawson /* Set up all valid states. */ 60056a70eadSNate Lawson sc->cpu_cx_count = 0; 6016b74f9b7SNate Lawson cx_ptr = sc->cpu_cx_states; 6026b74f9b7SNate Lawson for (i = 0; i < count; i++) { 6036b74f9b7SNate Lawson pkg = &top->Package.Elements[i + 1]; 60421cea91fSNate Lawson if (!ACPI_PKG_VALID(pkg, 4) || 60521cea91fSNate Lawson acpi_PkgInt32(pkg, 1, &cx_ptr->type) != 0 || 60621cea91fSNate Lawson acpi_PkgInt32(pkg, 2, &cx_ptr->trans_lat) != 0 || 60721cea91fSNate Lawson acpi_PkgInt32(pkg, 3, &cx_ptr->power) != 0) { 60821cea91fSNate Lawson 60980f006a1SNate Lawson device_printf(sc->cpu_dev, "skipping invalid Cx state package\n"); 6106b74f9b7SNate Lawson continue; 6116b74f9b7SNate Lawson } 6126b74f9b7SNate Lawson 6136b74f9b7SNate Lawson /* Validate the state to see if we should use it. */ 6146b74f9b7SNate Lawson switch (cx_ptr->type) { 6156b74f9b7SNate Lawson case ACPI_STATE_C1: 616907b6777SNate Lawson sc->cpu_non_c3 = i; 6176b74f9b7SNate Lawson cx_ptr++; 61856a70eadSNate Lawson sc->cpu_cx_count++; 6196b74f9b7SNate Lawson continue; 6206b74f9b7SNate Lawson case ACPI_STATE_C2: 6216b74f9b7SNate Lawson if (cx_ptr->trans_lat > 100) { 62256a70eadSNate Lawson ACPI_DEBUG_PRINT((ACPI_DB_INFO, 62356a70eadSNate Lawson "acpi_cpu%d: C2[%d] not available.\n", 62456a70eadSNate Lawson device_get_unit(sc->cpu_dev), i)); 6256b74f9b7SNate Lawson continue; 6266b74f9b7SNate Lawson } 627907b6777SNate Lawson sc->cpu_non_c3 = i; 6286b74f9b7SNate Lawson break; 6296b74f9b7SNate Lawson case ACPI_STATE_C3: 6306b74f9b7SNate Lawson default: 6316b74f9b7SNate Lawson if (cx_ptr->trans_lat > 1000 || 6326b74f9b7SNate Lawson (cpu_quirks & CPU_QUIRK_NO_C3) != 0) { 6336b74f9b7SNate Lawson 63456a70eadSNate Lawson ACPI_DEBUG_PRINT((ACPI_DB_INFO, 63556a70eadSNate Lawson "acpi_cpu%d: C3[%d] not available.\n", 63656a70eadSNate Lawson device_get_unit(sc->cpu_dev), i)); 6376b74f9b7SNate Lawson continue; 6386b74f9b7SNate Lawson } 6396b74f9b7SNate Lawson break; 6406b74f9b7SNate Lawson } 6416b74f9b7SNate Lawson 6426b74f9b7SNate Lawson #ifdef notyet 6436b74f9b7SNate Lawson /* Free up any previous register. */ 6446b74f9b7SNate Lawson if (cx_ptr->p_lvlx != NULL) { 6456b74f9b7SNate Lawson bus_release_resource(sc->cpu_dev, 0, 0, cx_ptr->p_lvlx); 6466b74f9b7SNate Lawson cx_ptr->p_lvlx = NULL; 6476b74f9b7SNate Lawson } 6486b74f9b7SNate Lawson #endif 6496b74f9b7SNate Lawson 6506b74f9b7SNate Lawson /* Allocate the control register for C2 or C3. */ 651907b6777SNate Lawson acpi_PkgGas(sc->cpu_dev, pkg, 0, &cx_ptr->res_type, &sc->cpu_rid, 652907b6777SNate Lawson &cx_ptr->p_lvlx, RF_SHAREABLE); 653f4eb0418SNate Lawson if (cx_ptr->p_lvlx) { 654907b6777SNate Lawson sc->cpu_rid++; 65556a70eadSNate Lawson ACPI_DEBUG_PRINT((ACPI_DB_INFO, 65656a70eadSNate Lawson "acpi_cpu%d: Got C%d - %d latency\n", 65756a70eadSNate Lawson device_get_unit(sc->cpu_dev), cx_ptr->type, 65856a70eadSNate Lawson cx_ptr->trans_lat)); 6596b74f9b7SNate Lawson cx_ptr++; 66056a70eadSNate Lawson sc->cpu_cx_count++; 6616b74f9b7SNate Lawson } 6626b74f9b7SNate Lawson } 6636b74f9b7SNate Lawson AcpiOsFree(buf.Pointer); 6646b74f9b7SNate Lawson 6656b74f9b7SNate Lawson return (0); 666fec754d4SMike Smith } 667fec754d4SMike Smith 668fec754d4SMike Smith /* 669fec754d4SMike Smith * Call this *after* all CPUs have been attached. 670fec754d4SMike Smith */ 671fec754d4SMike Smith static void 6726b74f9b7SNate Lawson acpi_cpu_startup(void *arg) 673fec754d4SMike Smith { 67456a70eadSNate Lawson struct acpi_cpu_softc *sc; 675907b6777SNate Lawson int i; 676fec754d4SMike Smith 677be2b1797SNate Lawson /* Get set of CPU devices */ 6783045c8afSNate Lawson devclass_get_devices(acpi_cpu_devclass, &cpu_devices, &cpu_ndevices); 679fec754d4SMike Smith 68056a70eadSNate Lawson /* 681907b6777SNate Lawson * Setup any quirks that might necessary now that we have probed 682907b6777SNate Lawson * all the CPUs 68356a70eadSNate Lawson */ 684907b6777SNate Lawson acpi_cpu_quirks(); 685907b6777SNate Lawson 686907b6777SNate Lawson cpu_cx_count = 0; 687907b6777SNate Lawson if (cpu_cx_generic) { 688907b6777SNate Lawson /* 689907b6777SNate Lawson * We are using generic Cx mode, probe for available Cx states 690907b6777SNate Lawson * for all processors. 691907b6777SNate Lawson */ 69256a70eadSNate Lawson for (i = 0; i < cpu_ndevices; i++) { 69356a70eadSNate Lawson sc = device_get_softc(cpu_devices[i]); 694907b6777SNate Lawson acpi_cpu_generic_cx_probe(sc); 69556a70eadSNate Lawson } 696907b6777SNate Lawson 697907b6777SNate Lawson /* 698907b6777SNate Lawson * Find the highest Cx state common to all CPUs 699907b6777SNate Lawson * in the system, taking quirks into account. 700907b6777SNate Lawson */ 701907b6777SNate Lawson for (i = 0; i < cpu_ndevices; i++) { 702907b6777SNate Lawson sc = device_get_softc(cpu_devices[i]); 703907b6777SNate Lawson if (sc->cpu_cx_count < cpu_cx_count) 704907b6777SNate Lawson cpu_cx_count = sc->cpu_cx_count; 705907b6777SNate Lawson } 706907b6777SNate Lawson } else { 707907b6777SNate Lawson /* 708907b6777SNate Lawson * We are using _CST mode, remove C3 state if necessary. 709907b6777SNate Lawson * Update the largest Cx state supported in the global cpu_cx_count. 710907b6777SNate Lawson * It will be used in the global Cx sysctl handler. 711907b6777SNate Lawson * As we now know for sure that we will be using _CST mode 712907b6777SNate Lawson * install our notify handler. 713907b6777SNate Lawson */ 714907b6777SNate Lawson for (i = 0; i < cpu_ndevices; i++) { 715907b6777SNate Lawson sc = device_get_softc(cpu_devices[i]); 716907b6777SNate Lawson if (cpu_quirks && CPU_QUIRK_NO_C3) { 717907b6777SNate Lawson sc->cpu_cx_count = sc->cpu_non_c3 + 1; 718907b6777SNate Lawson } 719907b6777SNate Lawson if (sc->cpu_cx_count > cpu_cx_count) 720907b6777SNate Lawson cpu_cx_count = sc->cpu_cx_count; 721907b6777SNate Lawson AcpiInstallNotifyHandler(sc->cpu_handle, ACPI_DEVICE_NOTIFY, 722907b6777SNate Lawson acpi_cpu_notify, sc); 723907b6777SNate Lawson } 724907b6777SNate Lawson } 72556a70eadSNate Lawson 7268c5468e3SNate Lawson /* Perform Cx final initialization. */ 727907b6777SNate Lawson for (i = 0; i < cpu_ndevices; i++) { 728907b6777SNate Lawson sc = device_get_softc(cpu_devices[i]); 729907b6777SNate Lawson acpi_cpu_startup_cx(sc); 730907b6777SNate Lawson } 731907b6777SNate Lawson 732907b6777SNate Lawson /* Add a sysctl handler to handle global Cx lowest setting */ 733907b6777SNate Lawson SYSCTL_ADD_PROC(&cpu_sysctl_ctx, SYSCTL_CHILDREN(cpu_sysctl_tree), 734907b6777SNate Lawson OID_AUTO, "cx_lowest", CTLTYPE_STRING | CTLFLAG_RW, 735907b6777SNate Lawson NULL, 0, acpi_cpu_global_cx_lowest_sysctl, "A", 736907b6777SNate Lawson "Global lowest Cx sleep state to use"); 737907b6777SNate Lawson 738907b6777SNate Lawson /* Take over idling from cpu_idle_default(). */ 739907b6777SNate Lawson cpu_cx_lowest = 0; 740907b6777SNate Lawson cpu_disable_idle = FALSE; 741907b6777SNate Lawson cpu_idle_hook = acpi_cpu_idle; 7426b74f9b7SNate Lawson } 7436b74f9b7SNate Lawson 74456a70eadSNate Lawson static void 745907b6777SNate Lawson acpi_cpu_startup_cx(struct acpi_cpu_softc *sc) 74656a70eadSNate Lawson { 74756a70eadSNate Lawson struct sbuf sb; 74856a70eadSNate Lawson int i; 74956a70eadSNate Lawson 750ae56b59fSNate Lawson /* 751907b6777SNate Lawson * Set up the list of Cx states 752ae56b59fSNate Lawson */ 753907b6777SNate Lawson sc->cpu_non_c3 = 0; 754907b6777SNate Lawson sbuf_new(&sb, sc->cpu_cx_supported, sizeof(sc->cpu_cx_supported), 755907b6777SNate Lawson SBUF_FIXEDLEN); 756907b6777SNate Lawson for (i = 0; i < sc->cpu_cx_count; i++) { 757ccc09458SNate Lawson sbuf_printf(&sb, "C%d/%d ", i + 1, sc->cpu_cx_states[i].trans_lat); 758907b6777SNate Lawson if (sc->cpu_cx_states[i].type < ACPI_STATE_C3) 759907b6777SNate Lawson sc->cpu_non_c3 = i; 760ae56b59fSNate Lawson } 76156a70eadSNate Lawson sbuf_trim(&sb); 76256a70eadSNate Lawson sbuf_finish(&sb); 763907b6777SNate Lawson 764907b6777SNate Lawson SYSCTL_ADD_STRING(&sc->cpu_sysctl_ctx, 765907b6777SNate Lawson SYSCTL_CHILDREN(device_get_sysctl_tree(sc->cpu_dev)), 766907b6777SNate Lawson OID_AUTO, "cx_supported", CTLFLAG_RD, 767907b6777SNate Lawson sc->cpu_cx_supported, 0, 768907b6777SNate Lawson "Cx/microsecond values for supported Cx states"); 769907b6777SNate Lawson SYSCTL_ADD_PROC(&sc->cpu_sysctl_ctx, 770907b6777SNate Lawson SYSCTL_CHILDREN(device_get_sysctl_tree(sc->cpu_dev)), 771ccc09458SNate Lawson OID_AUTO, "cx_lowest", CTLTYPE_STRING | CTLFLAG_RW, 772907b6777SNate Lawson (void *)sc, 0, acpi_cpu_cx_lowest_sysctl, "A", 77356a70eadSNate Lawson "lowest Cx sleep state to use"); 774907b6777SNate Lawson SYSCTL_ADD_PROC(&sc->cpu_sysctl_ctx, 775907b6777SNate Lawson SYSCTL_CHILDREN(device_get_sysctl_tree(sc->cpu_dev)), 776a2afe45aSNate Lawson OID_AUTO, "cx_usage", CTLTYPE_STRING | CTLFLAG_RD, 777907b6777SNate Lawson (void *)sc, 0, acpi_cpu_usage_sysctl, "A", 778a2afe45aSNate Lawson "percent usage for each Cx state"); 77956a70eadSNate Lawson 78056a70eadSNate Lawson #ifdef notyet 78156a70eadSNate Lawson /* Signal platform that we can handle _CST notification. */ 782907b6777SNate Lawson if (!cpu_cx_generic && cpu_cst_cnt != 0) { 783d92a2ebdSNate Lawson ACPI_LOCK(acpi); 78456a70eadSNate Lawson AcpiOsWritePort(cpu_smi_cmd, cpu_cst_cnt, 8); 785d92a2ebdSNate Lawson ACPI_UNLOCK(acpi); 78656a70eadSNate Lawson } 78756a70eadSNate Lawson #endif 78856a70eadSNate Lawson } 78956a70eadSNate Lawson 790fec754d4SMike Smith /* 791a2afe45aSNate Lawson * Idle the CPU in the lowest state possible. This function is called with 792a2afe45aSNate Lawson * interrupts disabled. Note that once it re-enables interrupts, a task 793a2afe45aSNate Lawson * switch can occur so do not access shared data (i.e. the softc) after 794a2afe45aSNate Lawson * interrupts are re-enabled. 7956b74f9b7SNate Lawson */ 7966b74f9b7SNate Lawson static void 7976b74f9b7SNate Lawson acpi_cpu_idle() 7986b74f9b7SNate Lawson { 7996b74f9b7SNate Lawson struct acpi_cpu_softc *sc; 80056a70eadSNate Lawson struct acpi_cx *cx_next; 8016b74f9b7SNate Lawson uint32_t start_time, end_time; 802a2afe45aSNate Lawson int bm_active, cx_next_idx, i; 8036b74f9b7SNate Lawson 8046b74f9b7SNate Lawson /* If disabled, return immediately. */ 805907b6777SNate Lawson if (cpu_disable_idle) { 8066b74f9b7SNate Lawson ACPI_ENABLE_IRQS(); 8076b74f9b7SNate Lawson return; 8086b74f9b7SNate Lawson } 8096b74f9b7SNate Lawson 810cd1f3db9SNate Lawson /* 811cd1f3db9SNate Lawson * Look up our CPU id to get our softc. If it's NULL, we'll use C1 812cd1f3db9SNate Lawson * since there is no ACPI processor object for this CPU. This occurs 813cd1f3db9SNate Lawson * for logical CPUs in the HTT case. 814cd1f3db9SNate Lawson */ 815cd1f3db9SNate Lawson sc = cpu_softc[PCPU_GET(cpuid)]; 816cd1f3db9SNate Lawson if (sc == NULL) { 817cd1f3db9SNate Lawson acpi_cpu_c1(); 818cd1f3db9SNate Lawson return; 819cd1f3db9SNate Lawson } 820cd1f3db9SNate Lawson 821a2afe45aSNate Lawson /* 822a2afe45aSNate Lawson * If we slept 100 us or more, use the lowest Cx state. Otherwise, 823a2afe45aSNate Lawson * find the lowest state that has a latency less than or equal to 824a2afe45aSNate Lawson * the length of our last sleep. 825a2afe45aSNate Lawson */ 826907b6777SNate Lawson cx_next_idx = sc->cpu_cx_lowest; 82780f006a1SNate Lawson if (sc->cpu_prev_sleep < 100) { 82880f006a1SNate Lawson /* 82980f006a1SNate Lawson * If we sleep too short all the time, this system may not implement 83080f006a1SNate Lawson * C2/3 correctly (i.e. reads return immediately). In this case, 83180f006a1SNate Lawson * back off and use the next higher level. 832907b6777SNate Lawson * It seems that when you have a dual core cpu (like the Intel Core Duo) 833907b6777SNate Lawson * that both cores will get out of C3 state as soon as one of them 834907b6777SNate Lawson * requires it. This breaks the sleep detection logic as the sleep 835907b6777SNate Lawson * counter is local to each cpu. Disable the sleep logic for now as a 836907b6777SNate Lawson * workaround if there's more than one CPU. The right fix would probably 837907b6777SNate Lawson * be to add quirks for system that don't really support C3 state. 83880f006a1SNate Lawson */ 839907b6777SNate Lawson if (mp_ncpus < 2 && sc->cpu_prev_sleep <= 1) { 840907b6777SNate Lawson sc->cpu_short_slp++; 841907b6777SNate Lawson if (sc->cpu_short_slp == 1000 && sc->cpu_cx_lowest != 0) { 842907b6777SNate Lawson if (sc->cpu_non_c3 == sc->cpu_cx_lowest && sc->cpu_non_c3 != 0) 843907b6777SNate Lawson sc->cpu_non_c3--; 844907b6777SNate Lawson sc->cpu_cx_lowest--; 845907b6777SNate Lawson sc->cpu_short_slp = 0; 84680f006a1SNate Lawson device_printf(sc->cpu_dev, 84780f006a1SNate Lawson "too many short sleeps, backing off to C%d\n", 848907b6777SNate Lawson sc->cpu_cx_lowest + 1); 84980f006a1SNate Lawson } 85080f006a1SNate Lawson } else 851907b6777SNate Lawson sc->cpu_short_slp = 0; 85280f006a1SNate Lawson 853907b6777SNate Lawson for (i = sc->cpu_cx_lowest; i >= 0; i--) 854a2afe45aSNate Lawson if (sc->cpu_cx_states[i].trans_lat <= sc->cpu_prev_sleep) { 855a2afe45aSNate Lawson cx_next_idx = i; 856a2afe45aSNate Lawson break; 857a2afe45aSNate Lawson } 85880f006a1SNate Lawson } 85956a70eadSNate Lawson 8606b74f9b7SNate Lawson /* 8616b74f9b7SNate Lawson * Check for bus master activity. If there was activity, clear 8626b74f9b7SNate Lawson * the bit and use the lowest non-C3 state. Note that the USB 8636b74f9b7SNate Lawson * driver polling for new devices keeps this bit set all the 864f435261dSNate Lawson * time if USB is loaded. 8656b74f9b7SNate Lawson */ 86618ececa0SNate Lawson if ((cpu_quirks & CPU_QUIRK_NO_BM_CTRL) == 0) { 8676b74f9b7SNate Lawson AcpiGetRegister(ACPI_BITREG_BUS_MASTER_STATUS, &bm_active, 8686b74f9b7SNate Lawson ACPI_MTX_DO_NOT_LOCK); 8696b74f9b7SNate Lawson if (bm_active != 0) { 8706b74f9b7SNate Lawson AcpiSetRegister(ACPI_BITREG_BUS_MASTER_STATUS, 1, 8716b74f9b7SNate Lawson ACPI_MTX_DO_NOT_LOCK); 872907b6777SNate Lawson cx_next_idx = min(cx_next_idx, sc->cpu_non_c3); 8736b74f9b7SNate Lawson } 874f435261dSNate Lawson } 8756b74f9b7SNate Lawson 876a2afe45aSNate Lawson /* Select the next state and update statistics. */ 877a2afe45aSNate Lawson cx_next = &sc->cpu_cx_states[cx_next_idx]; 878907b6777SNate Lawson sc->cpu_cx_stats[cx_next_idx]++; 879a2afe45aSNate Lawson KASSERT(cx_next->type != ACPI_STATE_C0, ("acpi_cpu_idle: C0 sleep")); 8806b74f9b7SNate Lawson 8816b74f9b7SNate Lawson /* 882a2afe45aSNate Lawson * Execute HLT (or equivalent) and wait for an interrupt. We can't 883a2afe45aSNate Lawson * calculate the time spent in C1 since the place we wake up is an 884a2afe45aSNate Lawson * ISR. Assume we slept one quantum and return. 8856b74f9b7SNate Lawson */ 886a2afe45aSNate Lawson if (cx_next->type == ACPI_STATE_C1) { 887a2afe45aSNate Lawson sc->cpu_prev_sleep = 1000000 / hz; 888a2afe45aSNate Lawson acpi_cpu_c1(); 889a2afe45aSNate Lawson return; 890a2afe45aSNate Lawson } 891a2afe45aSNate Lawson 892f435261dSNate Lawson /* 893f435261dSNate Lawson * For C3, disable bus master arbitration and enable bus master wake 894f435261dSNate Lawson * if BM control is available, otherwise flush the CPU cache. 895f435261dSNate Lawson */ 896a2afe45aSNate Lawson if (cx_next->type == ACPI_STATE_C3) { 897f435261dSNate Lawson if ((cpu_quirks & CPU_QUIRK_NO_BM_CTRL) == 0) { 898a2afe45aSNate Lawson AcpiSetRegister(ACPI_BITREG_ARB_DISABLE, 1, ACPI_MTX_DO_NOT_LOCK); 899f435261dSNate Lawson AcpiSetRegister(ACPI_BITREG_BUS_MASTER_RLD, 1, 900f435261dSNate Lawson ACPI_MTX_DO_NOT_LOCK); 901f435261dSNate Lawson } else 902f435261dSNate Lawson ACPI_FLUSH_CPU_CACHE(); 903a2afe45aSNate Lawson } 904a2afe45aSNate Lawson 9056b74f9b7SNate Lawson /* 906a2afe45aSNate Lawson * Read from P_LVLx to enter C2(+), checking time spent asleep. 9076b74f9b7SNate Lawson * Use the ACPI timer for measuring sleep time. Since we need to 9086b74f9b7SNate Lawson * get the time very close to the CPU start/stop clock logic, this 9096b74f9b7SNate Lawson * is the only reliable time source. 9106b74f9b7SNate Lawson */ 9116b74f9b7SNate Lawson AcpiHwLowLevelRead(32, &start_time, &AcpiGbl_FADT->XPmTmrBlk); 9126b74f9b7SNate Lawson CPU_GET_REG(cx_next->p_lvlx, 1); 9136b74f9b7SNate Lawson 9146b74f9b7SNate Lawson /* 9156b74f9b7SNate Lawson * Read the end time twice. Since it may take an arbitrary time 9166b74f9b7SNate Lawson * to enter the idle state, the first read may be executed before 9176b74f9b7SNate Lawson * the processor has stopped. Doing it again provides enough 9186b74f9b7SNate Lawson * margin that we are certain to have a correct value. 9196b74f9b7SNate Lawson */ 9206b74f9b7SNate Lawson AcpiHwLowLevelRead(32, &end_time, &AcpiGbl_FADT->XPmTmrBlk); 9216b74f9b7SNate Lawson AcpiHwLowLevelRead(32, &end_time, &AcpiGbl_FADT->XPmTmrBlk); 9226b74f9b7SNate Lawson 9236b74f9b7SNate Lawson /* Enable bus master arbitration and disable bus master wakeup. */ 92418ececa0SNate Lawson if (cx_next->type == ACPI_STATE_C3 && 92518ececa0SNate Lawson (cpu_quirks & CPU_QUIRK_NO_BM_CTRL) == 0) { 9266b74f9b7SNate Lawson AcpiSetRegister(ACPI_BITREG_ARB_DISABLE, 0, ACPI_MTX_DO_NOT_LOCK); 9276b74f9b7SNate Lawson AcpiSetRegister(ACPI_BITREG_BUS_MASTER_RLD, 0, ACPI_MTX_DO_NOT_LOCK); 9286b74f9b7SNate Lawson } 92980f006a1SNate Lawson ACPI_ENABLE_IRQS(); 9306b74f9b7SNate Lawson 9316b74f9b7SNate Lawson /* Find the actual time asleep in microseconds, minus overhead. */ 932eea17c34SNate Lawson end_time = acpi_TimerDelta(end_time, start_time); 933a2afe45aSNate Lawson sc->cpu_prev_sleep = PM_USEC(end_time) - cx_next->trans_lat; 9346b74f9b7SNate Lawson } 9356b74f9b7SNate Lawson 9366b74f9b7SNate Lawson /* 9378b888c66SNate Lawson * Re-evaluate the _CST object when we are notified that it changed. 93856a70eadSNate Lawson * 9396b74f9b7SNate Lawson * XXX Re-evaluation disabled until locking is done. 9406b74f9b7SNate Lawson */ 9416b74f9b7SNate Lawson static void 9426b74f9b7SNate Lawson acpi_cpu_notify(ACPI_HANDLE h, UINT32 notify, void *context) 9436b74f9b7SNate Lawson { 9446b74f9b7SNate Lawson struct acpi_cpu_softc *sc = (struct acpi_cpu_softc *)context; 9456b74f9b7SNate Lawson 9468b888c66SNate Lawson if (notify != ACPI_NOTIFY_CX_STATES) 9478b888c66SNate Lawson return; 9488b888c66SNate Lawson 9496b74f9b7SNate Lawson device_printf(sc->cpu_dev, "Cx states changed\n"); 9506b74f9b7SNate Lawson /* acpi_cpu_cx_cst(sc); */ 9516b74f9b7SNate Lawson } 9526b74f9b7SNate Lawson 9536b74f9b7SNate Lawson static int 954907b6777SNate Lawson acpi_cpu_quirks(void) 9556b74f9b7SNate Lawson { 956ae56b59fSNate Lawson device_t acpi_dev; 9576b74f9b7SNate Lawson 9586b74f9b7SNate Lawson /* 959907b6777SNate Lawson * Bus mastering arbitration control is needed to keep caches coherent 960907b6777SNate Lawson * while sleeping in C3. If it's not present but a working flush cache 961907b6777SNate Lawson * instruction is present, flush the caches before entering C3 instead. 962907b6777SNate Lawson * Otherwise, just disable C3 completely. 9636b74f9b7SNate Lawson */ 964907b6777SNate Lawson if (AcpiGbl_FADT->V1_Pm2CntBlk == 0 || AcpiGbl_FADT->Pm2CntLen == 0) { 965907b6777SNate Lawson if (AcpiGbl_FADT->WbInvd && AcpiGbl_FADT->WbInvdFlush == 0) { 966907b6777SNate Lawson cpu_quirks |= CPU_QUIRK_NO_BM_CTRL; 967907b6777SNate Lawson ACPI_DEBUG_PRINT((ACPI_DB_INFO, 968907b6777SNate Lawson "acpi_cpu%d: no BM control, using flush cache method\n", 969907b6777SNate Lawson device_get_unit(sc->cpu_dev))); 970907b6777SNate Lawson } else { 971907b6777SNate Lawson cpu_quirks |= CPU_QUIRK_NO_C3; 972907b6777SNate Lawson ACPI_DEBUG_PRINT((ACPI_DB_INFO, 973907b6777SNate Lawson "acpi_cpu%d: no BM control, C3 not available\n", 974907b6777SNate Lawson device_get_unit(sc->cpu_dev))); 975907b6777SNate Lawson } 976907b6777SNate Lawson } 977907b6777SNate Lawson 978907b6777SNate Lawson /* 979907b6777SNate Lawson * If we are using generic Cx mode, C3 on multiple CPUs requires using 980907b6777SNate Lawson * the expensive flush cache instruction. 981907b6777SNate Lawson */ 982907b6777SNate Lawson if (cpu_cx_generic && mp_ncpus > 1) 98318ececa0SNate Lawson cpu_quirks |= CPU_QUIRK_NO_BM_CTRL; 9846b74f9b7SNate Lawson 9856b74f9b7SNate Lawson /* Look for various quirks of the PIIX4 part. */ 9866b74f9b7SNate Lawson acpi_dev = pci_find_device(PCI_VENDOR_INTEL, PCI_DEVICE_82371AB_3); 9876b74f9b7SNate Lawson if (acpi_dev != NULL) { 9886b74f9b7SNate Lawson switch (pci_get_revid(acpi_dev)) { 9896b74f9b7SNate Lawson /* 9906b74f9b7SNate Lawson * Disable C3 support for all PIIX4 chipsets. Some of these parts 9916b74f9b7SNate Lawson * do not report the BMIDE status to the BM status register and 9926b74f9b7SNate Lawson * others have a livelock bug if Type-F DMA is enabled. Linux 9936b74f9b7SNate Lawson * works around the BMIDE bug by reading the BM status directly 9946b74f9b7SNate Lawson * but we take the simpler approach of disabling C3 for these 9956b74f9b7SNate Lawson * parts. 9966b74f9b7SNate Lawson * 9976b74f9b7SNate Lawson * See erratum #18 ("C3 Power State/BMIDE and Type-F DMA 9986b74f9b7SNate Lawson * Livelock") from the January 2002 PIIX4 specification update. 9996b74f9b7SNate Lawson * Applies to all PIIX4 models. 10006b74f9b7SNate Lawson */ 10016b74f9b7SNate Lawson case PCI_REVISION_4E: 10026b74f9b7SNate Lawson case PCI_REVISION_4M: 10036b74f9b7SNate Lawson cpu_quirks |= CPU_QUIRK_NO_C3; 10046b74f9b7SNate Lawson break; 10056b74f9b7SNate Lawson default: 10066b74f9b7SNate Lawson break; 10076b74f9b7SNate Lawson } 10086b74f9b7SNate Lawson } 10096b74f9b7SNate Lawson 10106b74f9b7SNate Lawson return (0); 10116b74f9b7SNate Lawson } 10126b74f9b7SNate Lawson 10136b74f9b7SNate Lawson static int 1014a2afe45aSNate Lawson acpi_cpu_usage_sysctl(SYSCTL_HANDLER_ARGS) 10156b74f9b7SNate Lawson { 1016907b6777SNate Lawson struct acpi_cpu_softc *sc; 10176b74f9b7SNate Lawson struct sbuf sb; 10186b74f9b7SNate Lawson char buf[128]; 10196b74f9b7SNate Lawson int i; 10204a03551dSNate Lawson uintmax_t fract, sum, whole; 10216b74f9b7SNate Lawson 1022907b6777SNate Lawson sc = (struct acpi_cpu_softc *) arg1; 10233e7fa136SNate Lawson sum = 0; 1024907b6777SNate Lawson for (i = 0; i < sc->cpu_cx_count; i++) 1025907b6777SNate Lawson sum += sc->cpu_cx_stats[i]; 10266b74f9b7SNate Lawson sbuf_new(&sb, buf, sizeof(buf), SBUF_FIXEDLEN); 1027907b6777SNate Lawson for (i = 0; i < sc->cpu_cx_count; i++) { 10283e7fa136SNate Lawson if (sum > 0) { 1029907b6777SNate Lawson whole = (uintmax_t)sc->cpu_cx_stats[i] * 100; 10303e7fa136SNate Lawson fract = (whole % sum) * 100; 10313e7fa136SNate Lawson sbuf_printf(&sb, "%u.%02u%% ", (u_int)(whole / sum), 10323e7fa136SNate Lawson (u_int)(fract / sum)); 10333e7fa136SNate Lawson } else 10343e7fa136SNate Lawson sbuf_printf(&sb, "0%% "); 10353e7fa136SNate Lawson } 10366b74f9b7SNate Lawson sbuf_trim(&sb); 10376b74f9b7SNate Lawson sbuf_finish(&sb); 1038ccc09458SNate Lawson sysctl_handle_string(oidp, sbuf_data(&sb), sbuf_len(&sb), req); 1039ccc09458SNate Lawson sbuf_delete(&sb); 10406b74f9b7SNate Lawson 10416b74f9b7SNate Lawson return (0); 10426b74f9b7SNate Lawson } 10436b74f9b7SNate Lawson 10446b74f9b7SNate Lawson static int 10456b74f9b7SNate Lawson acpi_cpu_cx_lowest_sysctl(SYSCTL_HANDLER_ARGS) 10466b74f9b7SNate Lawson { 10476b74f9b7SNate Lawson struct acpi_cpu_softc *sc; 1048ccc09458SNate Lawson char state[8]; 10496b74f9b7SNate Lawson int val, error, i; 10506b74f9b7SNate Lawson 1051907b6777SNate Lawson sc = (struct acpi_cpu_softc *) arg1; 1052907b6777SNate Lawson snprintf(state, sizeof(state), "C%d", sc->cpu_cx_lowest + 1); 1053907b6777SNate Lawson error = sysctl_handle_string(oidp, state, sizeof(state), req); 1054907b6777SNate Lawson if (error != 0 || req->newptr == NULL) 1055907b6777SNate Lawson return (error); 1056907b6777SNate Lawson if (strlen(state) < 2 || toupper(state[0]) != 'C') 1057907b6777SNate Lawson return (EINVAL); 1058907b6777SNate Lawson val = (int) strtol(state + 1, NULL, 10) - 1; 1059907b6777SNate Lawson if (val < 0 || val > sc->cpu_cx_count - 1) 1060907b6777SNate Lawson return (EINVAL); 1061907b6777SNate Lawson 1062907b6777SNate Lawson ACPI_SERIAL_BEGIN(cpu); 1063907b6777SNate Lawson sc->cpu_cx_lowest = val; 1064907b6777SNate Lawson 1065907b6777SNate Lawson /* If not disabling, cache the new lowest non-C3 state. */ 1066907b6777SNate Lawson sc->cpu_non_c3 = 0; 1067907b6777SNate Lawson for (i = sc->cpu_cx_lowest; i >= 0; i--) { 1068907b6777SNate Lawson if (sc->cpu_cx_states[i].type < ACPI_STATE_C3) { 1069907b6777SNate Lawson sc->cpu_non_c3 = i; 1070907b6777SNate Lawson break; 1071907b6777SNate Lawson } 1072907b6777SNate Lawson } 1073907b6777SNate Lawson 1074907b6777SNate Lawson /* Reset the statistics counters. */ 1075907b6777SNate Lawson bzero(sc->cpu_cx_stats, sizeof(sc->cpu_cx_stats)); 1076907b6777SNate Lawson ACPI_SERIAL_END(cpu); 1077907b6777SNate Lawson 1078907b6777SNate Lawson return (0); 1079907b6777SNate Lawson } 1080907b6777SNate Lawson 1081907b6777SNate Lawson static int 1082907b6777SNate Lawson acpi_cpu_global_cx_lowest_sysctl(SYSCTL_HANDLER_ARGS) 1083907b6777SNate Lawson { 1084907b6777SNate Lawson struct acpi_cpu_softc *sc; 1085907b6777SNate Lawson char state[8]; 1086907b6777SNate Lawson int val, error, i, j; 1087907b6777SNate Lawson 1088ccc09458SNate Lawson snprintf(state, sizeof(state), "C%d", cpu_cx_lowest + 1); 1089ccc09458SNate Lawson error = sysctl_handle_string(oidp, state, sizeof(state), req); 10906b74f9b7SNate Lawson if (error != 0 || req->newptr == NULL) 10916b74f9b7SNate Lawson return (error); 1092ccc09458SNate Lawson if (strlen(state) < 2 || toupper(state[0]) != 'C') 1093ccc09458SNate Lawson return (EINVAL); 1094ccc09458SNate Lawson val = (int) strtol(state + 1, NULL, 10) - 1; 109556a70eadSNate Lawson if (val < 0 || val > cpu_cx_count - 1) 10966b74f9b7SNate Lawson return (EINVAL); 10976b74f9b7SNate Lawson 10986b74f9b7SNate Lawson cpu_cx_lowest = val; 10996b74f9b7SNate Lawson 1100907b6777SNate Lawson /* 1101907b6777SNate Lawson * Update the new lowest useable Cx state for all CPUs 1102907b6777SNate Lawson */ 1103907b6777SNate Lawson ACPI_SERIAL_BEGIN(cpu); 1104907b6777SNate Lawson for (i = 0; i < cpu_ndevices; i++) { 1105907b6777SNate Lawson sc = device_get_softc(cpu_devices[i]); 1106907b6777SNate Lawson sc->cpu_cx_lowest = cpu_cx_lowest; 1107907b6777SNate Lawson sc->cpu_non_c3 = 0; 1108907b6777SNate Lawson for (j = sc->cpu_cx_lowest; j >= 0; j++) { 11096b74f9b7SNate Lawson if (sc->cpu_cx_states[i].type < ACPI_STATE_C3) { 1110907b6777SNate Lawson sc->cpu_non_c3 = i; 11116b74f9b7SNate Lawson break; 11126b74f9b7SNate Lawson } 11136b74f9b7SNate Lawson } 11146b74f9b7SNate Lawson 11156b74f9b7SNate Lawson /* Reset the statistics counters. */ 1116907b6777SNate Lawson bzero(sc->cpu_cx_stats, sizeof(sc->cpu_cx_stats)); 1117907b6777SNate Lawson } 1118d92a2ebdSNate Lawson ACPI_SERIAL_END(cpu); 11196b74f9b7SNate Lawson 11206b74f9b7SNate Lawson return (0); 11216b74f9b7SNate Lawson } 1122