Date: Fri, 2 Sep 2011 17:06:23 +0000 (UTC) From: Xin LI <delphij@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r225339 - head/sys/dev/coretemp Message-ID: <201109021706.p82H6NLT008251@svn.freebsd.org>
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Author: delphij Date: Fri Sep 2 17:06:23 2011 New Revision: 225339 URL: http://svn.freebsd.org/changeset/base/225339 Log: Expose more variables from coretemp(4) via sysctl: - tjmax - Tj(max) value from the CPU - delta - current delta reading - resolution - sensor resolution in Celsius - throttle_log - whether a #PROCHOT was asserted since last reset Submitted by: Mark Johnston <markjdb gmail.com> (mostly) MFC after: 1 month Approved by: re (kib) Modified: head/sys/dev/coretemp/coretemp.c Modified: head/sys/dev/coretemp/coretemp.c ============================================================================== --- head/sys/dev/coretemp/coretemp.c Fri Sep 2 17:05:34 2011 (r225338) +++ head/sys/dev/coretemp/coretemp.c Fri Sep 2 17:06:23 2011 (r225339) @@ -48,12 +48,21 @@ __FBSDID("$FreeBSD$"); #include <machine/cputypes.h> #include <machine/md_var.h> -#define TZ_ZEROC 2732 +#define TZ_ZEROC 2732 + +#define THERM_STATUS_LOG 0x02 +#define THERM_STATUS 0x01 +#define THERM_STATUS_TEMP_SHIFT 16 +#define THERM_STATUS_TEMP_MASK 0x7f +#define THERM_STATUS_RES_SHIFT 27 +#define THERM_STATUS_RES_MASK 0x0f +#define THERM_STATUS_VALID_SHIFT 31 +#define THERM_STATUS_VALID_MASK 0x01 struct coretemp_softc { device_t sc_dev; int sc_tjmax; - struct sysctl_oid *sc_oid; + unsigned int sc_throttle_log; }; /* @@ -64,8 +73,10 @@ static int coretemp_probe(device_t dev); static int coretemp_attach(device_t dev); static int coretemp_detach(device_t dev); -static int coretemp_get_temp(device_t dev); -static int coretemp_get_temp_sysctl(SYSCTL_HANDLER_ARGS); +static uint64_t coretemp_get_thermal_msr(int cpu); +static void coretemp_clear_thermal_msr(int cpu); +static int coretemp_get_val_sysctl(SYSCTL_HANDLER_ARGS); +static int coretemp_throttle_log_sysctl(SYSCTL_HANDLER_ARGS); static device_method_t coretemp_methods[] = { /* Device interface */ @@ -83,8 +94,16 @@ static driver_t coretemp_driver = { sizeof(struct coretemp_softc), }; +enum therm_info { + CORETEMP_TEMP, + CORETEMP_DELTA, + CORETEMP_RESOLUTION, + CORETEMP_TJMAX, +}; + static devclass_t coretemp_devclass; -DRIVER_MODULE(coretemp, cpu, coretemp_driver, coretemp_devclass, NULL, NULL); +DRIVER_MODULE(coretemp, cpu, coretemp_driver, coretemp_devclass, NULL, + NULL); static void coretemp_identify(driver_t *driver, device_t parent) @@ -135,6 +154,8 @@ coretemp_attach(device_t dev) uint64_t msr; int cpu_model, cpu_stepping; int ret, tjtarget; + struct sysctl_oid *oid; + struct sysctl_ctx_list *ctx; sc->sc_dev = dev; pdev = device_get_parent(dev); @@ -149,7 +170,7 @@ coretemp_attach(device_t dev) */ if (cpu_model < 0xe) return (ENXIO); - + #if 0 /* * XXXrpaulo: I have this CPU model and when it returns from C3 * coretemp continues to function properly. @@ -216,7 +237,7 @@ coretemp_attach(device_t dev) ret = rdmsr_safe(MSR_IA32_TEMPERATURE_TARGET, &msr); if (ret == 0) { tjtarget = (msr >> 16) & 0xff; - + /* * On earlier generation of processors, the value * obtained from IA32_TEMPERATURE_TARGET register is @@ -243,15 +264,35 @@ coretemp_attach(device_t dev) if (bootverbose) device_printf(dev, "Setting TjMax=%d\n", sc->sc_tjmax); + ctx = device_get_sysctl_ctx(dev); + + oid = SYSCTL_ADD_NODE(ctx, + SYSCTL_CHILDREN(device_get_sysctl_tree(pdev)), OID_AUTO, + "coretemp", CTLFLAG_RD, NULL, "Per-CPU thermal information"); + /* - * Add the "temperature" MIB to dev.cpu.N. + * Add the MIBs to dev.cpu.N and dev.cpu.N.coretemp. */ - sc->sc_oid = SYSCTL_ADD_PROC(device_get_sysctl_ctx(pdev), - SYSCTL_CHILDREN(device_get_sysctl_tree(pdev)), - OID_AUTO, "temperature", - CTLTYPE_INT | CTLFLAG_RD, - dev, 0, coretemp_get_temp_sysctl, "IK", + SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(device_get_sysctl_tree(pdev)), + OID_AUTO, "temperature", CTLTYPE_INT | CTLFLAG_RD, dev, + CORETEMP_TEMP, coretemp_get_val_sysctl, "IK", "Current temperature"); + SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, "delta", + CTLTYPE_INT | CTLFLAG_RD, dev, CORETEMP_DELTA, + coretemp_get_val_sysctl, "I", + "Delta between TCC activation and current temperature"); + SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, "resolution", + CTLTYPE_INT | CTLFLAG_RD, dev, CORETEMP_RESOLUTION, + coretemp_get_val_sysctl, "I", + "Resolution of CPU thermal sensor"); + SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, "tjmax", + CTLTYPE_INT | CTLFLAG_RD, dev, CORETEMP_TJMAX, + coretemp_get_val_sysctl, "IK", + "TCC activation temperature"); + SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, + "throttle_log", CTLTYPE_INT | CTLFLAG_RW, dev, 0, + coretemp_throttle_log_sysctl, "I", + "Set to 1 if the thermal sensor has tripped"); return (0); } @@ -259,22 +300,13 @@ coretemp_attach(device_t dev) static int coretemp_detach(device_t dev) { - struct coretemp_softc *sc = device_get_softc(dev); - - sysctl_remove_oid(sc->sc_oid, 1, 0); - return (0); } - -static int -coretemp_get_temp(device_t dev) +static uint64_t +coretemp_get_thermal_msr(int cpu) { uint64_t msr; - int temp; - int cpu = device_get_unit(dev); - struct coretemp_softc *sc = device_get_softc(dev); - char stemp[16]; thread_lock(curthread); sched_bind(curthread, cpu); @@ -296,51 +328,116 @@ coretemp_get_temp(device_t dev) sched_unbind(curthread); thread_unlock(curthread); - /* - * Check for Thermal Status and Thermal Status Log. - */ - if ((msr & 0x3) == 0x3) - device_printf(dev, "PROCHOT asserted\n"); + return (msr); +} + +static void +coretemp_clear_thermal_msr(int cpu) +{ + thread_lock(curthread); + sched_bind(curthread, cpu); + thread_unlock(curthread); + + wrmsr(MSR_THERM_STATUS, 0); + + thread_lock(curthread); + sched_unbind(curthread); + thread_unlock(curthread); +} + +static int +coretemp_get_val_sysctl(SYSCTL_HANDLER_ARGS) +{ + device_t dev; + uint64_t msr; + int val, tmp; + struct coretemp_softc *sc; + enum therm_info type; + char stemp[16]; + + dev = (device_t) arg1; + msr = coretemp_get_thermal_msr(device_get_unit(dev)); + sc = device_get_softc(dev); + type = arg2; + + if (((msr >> THERM_STATUS_VALID_SHIFT) & THERM_STATUS_VALID_MASK) != 1) { + val = -1; + } else { + switch (type) { + case CORETEMP_TEMP: + tmp = (msr >> THERM_STATUS_TEMP_SHIFT) & + THERM_STATUS_TEMP_MASK; + val = (sc->sc_tjmax - tmp) * 10 + TZ_ZEROC; + break; + case CORETEMP_DELTA: + val = (msr >> THERM_STATUS_TEMP_SHIFT) & + THERM_STATUS_TEMP_MASK; + break; + case CORETEMP_RESOLUTION: + val = (msr >> THERM_STATUS_RES_SHIFT) & + THERM_STATUS_RES_MASK; + break; + case CORETEMP_TJMAX: + val = sc->sc_tjmax * 10 + TZ_ZEROC; + break; + } + } + + if (msr & THERM_STATUS_LOG) { + sc->sc_throttle_log = 1; - /* - * Bit 31 contains "Reading valid" - */ - if (((msr >> 31) & 0x1) == 1) { /* - * Starting on bit 16 and ending on bit 22. + * Check for Critical Temperature Status and Critical + * Temperature Log. It doesn't really matter if the + * current temperature is invalid because the "Critical + * Temperature Log" bit will tell us if the Critical + * Temperature has * been reached in past. It's not + * directly related to the current temperature. + * + * If we reach a critical level, allow devctl(4) + * to catch this and shutdown the system. */ - temp = sc->sc_tjmax - ((msr >> 16) & 0x7f); - } else - temp = -1; - - /* - * Check for Critical Temperature Status and Critical - * Temperature Log. - * It doesn't really matter if the current temperature is - * invalid because the "Critical Temperature Log" bit will - * tell us if the Critical Temperature has been reached in - * past. It's not directly related to the current temperature. - * - * If we reach a critical level, allow devctl(4) to catch this - * and shutdown the system. - */ - if (((msr >> 4) & 0x3) == 0x3) { - device_printf(dev, "critical temperature detected, " - "suggest system shutdown\n"); - snprintf(stemp, sizeof(stemp), "%d", temp); - devctl_notify("coretemp", "Thermal", stemp, "notify=0xcc"); + if (msr & THERM_STATUS) { + tmp = (msr >> THERM_STATUS_TEMP_SHIFT) & + THERM_STATUS_TEMP_MASK; + tmp = (sc->sc_tjmax - tmp) * 10 + TZ_ZEROC; + device_printf(dev, "critical temperature detected, " + "suggest system shutdown\n"); + snprintf(stemp, sizeof(stemp), "%d", tmp); + devctl_notify("coretemp", "Thermal", stemp, + "notify=0xcc"); + } } - return (temp); + return (sysctl_handle_int(oidp, &val, 0, req)); } static int -coretemp_get_temp_sysctl(SYSCTL_HANDLER_ARGS) +coretemp_throttle_log_sysctl(SYSCTL_HANDLER_ARGS) { - device_t dev = (device_t) arg1; - int temp; + device_t dev; + uint64_t msr; + int error, val; + struct coretemp_softc *sc; + + dev = (device_t) arg1; + msr = coretemp_get_thermal_msr(device_get_unit(dev)); + sc = device_get_softc(dev); + + if (msr & THERM_STATUS_LOG) + sc->sc_throttle_log = 1; + + val = sc->sc_throttle_log; - temp = coretemp_get_temp(dev) * 10 + TZ_ZEROC; + error = sysctl_handle_int(oidp, &val, 0, req); - return (sysctl_handle_int(oidp, &temp, 0, req)); + if (error || !req->newptr) + return (error); + else if (val != 0) + return (EINVAL); + + coretemp_clear_thermal_msr(device_get_unit(dev)); + sc->sc_throttle_log = 0; + + return (0); }
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