From patchwork Tue Sep 27 05:50:14 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: "Nilawar, Badal" X-Patchwork-Id: 12989880 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 1CD06C07E9D for ; Tue, 27 Sep 2022 05:48:35 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id DFA0610E8C4; Tue, 27 Sep 2022 05:48:20 +0000 (UTC) Received: from mga06.intel.com (mga06b.intel.com [134.134.136.31]) by gabe.freedesktop.org (Postfix) with ESMTPS id B5A6110E359; Tue, 27 Sep 2022 05:47:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1664257662; x=1695793662; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=/e+/qkwPrTEcpE5jdFwc9Af5BI/mNT8i1RHqg7Wxh6I=; b=AxoWvOEt+5BXFgEffZmLxdaeXjub6/rPx/2XwX8u/EXUpqVWS3yTRoPI ZClXSjVGuC3Fk5Vsox51BsM51JvVGYNrg2Pmqx/0JxO0Lz9YXaIYKz/ni dRxUofxl50Z3yhdaCm13IITCrYPD2k+yc385MPs+k27l71sYeVP5Gvqd/ CG4VsQ5SiUueXaaeUg8wD4LtXdhL+DmTlqfvz2zM0TtgWd1o93vJh9Sml dkBzUSFIllP+T0W2Q3IlJKmct0tWS4hSo79PuzLKEQ2yjQDtt1duK0Ls3 7QH4Mmi+BncsqaXHw4y6gNxXhL6GSCx2PlfHBzqf5WxYVvr1NMjlk6WX3 g==; X-IronPort-AV: E=McAfee;i="6500,9779,10482"; a="363066385" X-IronPort-AV: E=Sophos;i="5.93,348,1654585200"; d="scan'208";a="363066385" Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by orsmga104.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 26 Sep 2022 22:47:42 -0700 X-IronPort-AV: E=McAfee;i="6500,9779,10482"; a="725376811" X-IronPort-AV: E=Sophos;i="5.93,348,1654585200"; d="scan'208";a="725376811" Received: from bnilawar-desk1.iind.intel.com ([10.145.169.158]) by fmsmga002-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 26 Sep 2022 22:47:39 -0700 From: Badal Nilawar To: intel-gfx@lists.freedesktop.org Date: Tue, 27 Sep 2022 11:20:14 +0530 Message-Id: <20220927055020.3499420-2-badal.nilawar@intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220927055020.3499420-1-badal.nilawar@intel.com> References: <20220927055020.3499420-1-badal.nilawar@intel.com> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH 1/7] drm/i915/hwmon: Add HWMON infrastructure X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-hwmon@vger.kernel.org, andi.shyti@intel.com, dri-devel@lists.freedesktop.org Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" From: Dale B Stimson The i915 HWMON module will be used to expose voltage, power and energy values for dGfx. Here we set up i915 hwmon infrastructure including i915 hwmon registration, basic data structures and functions. v2: - Create HWMON infra patch (Ashutosh) - Fixed review comments (Jani) - Remove "select HWMON" from i915/Kconfig (Jani) v3: Use hwm_ prefix for static functions (Ashutosh) v4: s/#ifdef CONFIG_HWMON/#if IS_REACHABLE(CONFIG_HWMON)/ since the former doesn't work if hwmon is compiled as a module (Guenter) v5: Fixed review comments (Jani) v6: s/kzalloc/devm_kzalloc/ (Andi) v7: s/hwmon_device_register_with_info/ devm_hwmon_device_register_with_info/ (Ashutosh) Cc: Guenter Roeck Signed-off-by: Dale B Stimson Signed-off-by: Ashutosh Dixit Signed-off-by: Riana Tauro Signed-off-by: Badal Nilawar Acked-by: Guenter Roeck Reviewed-by: Ashutosh Dixit Reviewed-by: Anshuman Gupta Reviewed-by: Andi Shyti --- drivers/gpu/drm/i915/Makefile | 3 + drivers/gpu/drm/i915/i915_driver.c | 5 ++ drivers/gpu/drm/i915/i915_drv.h | 2 + drivers/gpu/drm/i915/i915_hwmon.c | 122 +++++++++++++++++++++++++++++ drivers/gpu/drm/i915/i915_hwmon.h | 20 +++++ 5 files changed, 152 insertions(+) create mode 100644 drivers/gpu/drm/i915/i915_hwmon.c create mode 100644 drivers/gpu/drm/i915/i915_hwmon.h diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefile index a26edcdadc21..66a6023e61a6 100644 --- a/drivers/gpu/drm/i915/Makefile +++ b/drivers/gpu/drm/i915/Makefile @@ -209,6 +209,9 @@ i915-y += gt/uc/intel_uc.o \ # graphics system controller (GSC) support i915-y += gt/intel_gsc.o +# graphics hardware monitoring (HWMON) support +i915-$(CONFIG_HWMON) += i915_hwmon.o + # modesetting core code i915-y += \ display/hsw_ips.o \ diff --git a/drivers/gpu/drm/i915/i915_driver.c b/drivers/gpu/drm/i915/i915_driver.c index fb3826dabe8b..0aec1513ad71 100644 --- a/drivers/gpu/drm/i915/i915_driver.c +++ b/drivers/gpu/drm/i915/i915_driver.c @@ -81,6 +81,7 @@ #include "i915_drm_client.h" #include "i915_drv.h" #include "i915_getparam.h" +#include "i915_hwmon.h" #include "i915_ioc32.h" #include "i915_ioctl.h" #include "i915_irq.h" @@ -764,6 +765,8 @@ static void i915_driver_register(struct drm_i915_private *dev_priv) for_each_gt(gt, dev_priv, i) intel_gt_driver_register(gt); + i915_hwmon_register(dev_priv); + intel_display_driver_register(dev_priv); intel_power_domains_enable(dev_priv); @@ -796,6 +799,8 @@ static void i915_driver_unregister(struct drm_i915_private *dev_priv) for_each_gt(gt, dev_priv, i) intel_gt_driver_unregister(gt); + i915_hwmon_unregister(dev_priv); + i915_perf_unregister(dev_priv); i915_pmu_unregister(dev_priv); diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index 84a2f6b16f57..2447794ac58d 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -349,6 +349,8 @@ struct drm_i915_private { struct i915_perf perf; + struct i915_hwmon *hwmon; + /* Abstract the submission mechanism (legacy ringbuffer or execlists) away */ struct intel_gt gt0; diff --git a/drivers/gpu/drm/i915/i915_hwmon.c b/drivers/gpu/drm/i915/i915_hwmon.c new file mode 100644 index 000000000000..231552fda374 --- /dev/null +++ b/drivers/gpu/drm/i915/i915_hwmon.c @@ -0,0 +1,122 @@ +// SPDX-License-Identifier: MIT +/* + * Copyright © 2022 Intel Corporation + */ + +#include +#include +#include + +#include "i915_drv.h" +#include "i915_hwmon.h" +#include "i915_reg.h" +#include "intel_mchbar_regs.h" + +struct hwm_reg { +}; + +struct hwm_drvdata { + struct i915_hwmon *hwmon; + struct intel_uncore *uncore; + struct device *hwmon_dev; + char name[12]; +}; + +struct i915_hwmon { + struct hwm_drvdata ddat; + struct mutex hwmon_lock; /* counter overflow logic and rmw */ + struct hwm_reg rg; +}; + +static const struct hwmon_channel_info *hwm_info[] = { + NULL +}; + +static umode_t +hwm_is_visible(const void *drvdata, enum hwmon_sensor_types type, + u32 attr, int channel) +{ + switch (type) { + default: + return 0; + } +} + +static int +hwm_read(struct device *dev, enum hwmon_sensor_types type, u32 attr, + int channel, long *val) +{ + switch (type) { + default: + return -EOPNOTSUPP; + } +} + +static int +hwm_write(struct device *dev, enum hwmon_sensor_types type, u32 attr, + int channel, long val) +{ + switch (type) { + default: + return -EOPNOTSUPP; + } +} + +static const struct hwmon_ops hwm_ops = { + .is_visible = hwm_is_visible, + .read = hwm_read, + .write = hwm_write, +}; + +static const struct hwmon_chip_info hwm_chip_info = { + .ops = &hwm_ops, + .info = hwm_info, +}; + +static void +hwm_get_preregistration_info(struct drm_i915_private *i915) +{ +} + +void i915_hwmon_register(struct drm_i915_private *i915) +{ + struct device *dev = i915->drm.dev; + struct i915_hwmon *hwmon; + struct device *hwmon_dev; + struct hwm_drvdata *ddat; + + /* hwmon is available only for dGfx */ + if (!IS_DGFX(i915)) + return; + + hwmon = devm_kzalloc(dev, sizeof(*hwmon), GFP_KERNEL); + if (!hwmon) + return; + + i915->hwmon = hwmon; + mutex_init(&hwmon->hwmon_lock); + ddat = &hwmon->ddat; + + ddat->hwmon = hwmon; + ddat->uncore = &i915->uncore; + snprintf(ddat->name, sizeof(ddat->name), "i915"); + + hwm_get_preregistration_info(i915); + + /* hwmon_dev points to device hwmon */ + hwmon_dev = devm_hwmon_device_register_with_info(dev, ddat->name, + ddat, + &hwm_chip_info, + NULL); + if (IS_ERR(hwmon_dev)) { + i915->hwmon = NULL; + return; + } + + ddat->hwmon_dev = hwmon_dev; +} + +void i915_hwmon_unregister(struct drm_i915_private *i915) +{ + fetch_and_zero(&i915->hwmon); +} diff --git a/drivers/gpu/drm/i915/i915_hwmon.h b/drivers/gpu/drm/i915/i915_hwmon.h new file mode 100644 index 000000000000..7ca9cf2c34c9 --- /dev/null +++ b/drivers/gpu/drm/i915/i915_hwmon.h @@ -0,0 +1,20 @@ +/* SPDX-License-Identifier: MIT */ + +/* + * Copyright © 2022 Intel Corporation + */ + +#ifndef __I915_HWMON_H__ +#define __I915_HWMON_H__ + +struct drm_i915_private; + +#if IS_REACHABLE(CONFIG_HWMON) +void i915_hwmon_register(struct drm_i915_private *i915); +void i915_hwmon_unregister(struct drm_i915_private *i915); +#else +static inline void i915_hwmon_register(struct drm_i915_private *i915) { }; +static inline void i915_hwmon_unregister(struct drm_i915_private *i915) { }; +#endif + +#endif /* __I915_HWMON_H__ */ From patchwork Tue Sep 27 05:50:15 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Nilawar, Badal" X-Patchwork-Id: 12989874 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 24710C54EE9 for ; Tue, 27 Sep 2022 05:48:20 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 1589310E561; Tue, 27 Sep 2022 05:48:15 +0000 (UTC) Received: from mga06.intel.com (mga06b.intel.com [134.134.136.31]) by gabe.freedesktop.org (Postfix) with ESMTPS id DC2FC10E3D8; Tue, 27 Sep 2022 05:47:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1664257665; x=1695793665; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=72MW387bWxRHGDNjikZs6vQHO7rTYMd+2DtfGtpHAQk=; b=iUR9p3yd9M4i25dhwRG9Ph1rrCwmPmfP33ub467TkMPQTlGQ3YSfIxzt 54T21UyxhziP23r7EEg1GPKtr44eQ5suCveUg75oQuk1EXmHzYpnbI3gq xjz33e9U6s7ij9Lk0ZI89YQWnGTxQVpZKrSiZaKe1M8HCE5itUBpNYJYi Qobbzb6N1zbqXBjsztcF+1wHfTld7SocTJxfn+GIj4ZyuF4q+qCU8/p2M bSuvGcm64DCtf4cA1nLRSWveL8nblobUqSzJlr4/YUIlfk4eCfm4tk1uw k6kp4//CSJZsjTVbGpdg8bnyFJWmYABHlrxfHXZEJbDHxxBjcZPiY4y2c g==; X-IronPort-AV: E=McAfee;i="6500,9779,10482"; a="363066391" X-IronPort-AV: E=Sophos;i="5.93,348,1654585200"; d="scan'208";a="363066391" Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by orsmga104.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 26 Sep 2022 22:47:45 -0700 X-IronPort-AV: E=McAfee;i="6500,9779,10482"; a="725376821" X-IronPort-AV: E=Sophos;i="5.93,348,1654585200"; d="scan'208";a="725376821" Received: from bnilawar-desk1.iind.intel.com ([10.145.169.158]) by fmsmga002-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 26 Sep 2022 22:47:42 -0700 From: Badal Nilawar To: intel-gfx@lists.freedesktop.org Date: Tue, 27 Sep 2022 11:20:15 +0530 Message-Id: <20220927055020.3499420-3-badal.nilawar@intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220927055020.3499420-1-badal.nilawar@intel.com> References: <20220927055020.3499420-1-badal.nilawar@intel.com> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH 2/7] drm/i915/hwmon: Add HWMON current voltage support X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-hwmon@vger.kernel.org, andi.shyti@intel.com, dri-devel@lists.freedesktop.org Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" From: Riana Tauro Use i915 HWMON subsystem to display current input voltage. v2: - Updated date and kernel version in feature description - Fixed review comments (Ashutosh) v3: Use macro HWMON_CHANNEL_INFO to define hwmon channel (Guenter) v4: - Fixed review comments (Ashutosh) - Use hwm_ prefix for static functions (Ashutosh) v5: Added unit of voltage as millivolts (Ashutosh) v6: KernelVersion: 6.2, Date: February 2023 in doc (Tvrtko) Cc: Guenter Roeck Cc: Anshuman Gupta Signed-off-by: Riana Tauro Signed-off-by: Badal Nilawar Acked-by: Guenter Roeck Reviewed-by: Ashutosh Dixit Reviewed-by: Anshuman Gupta --- .../ABI/testing/sysfs-driver-intel-i915-hwmon | 7 +++ drivers/gpu/drm/i915/gt/intel_gt_regs.h | 3 ++ drivers/gpu/drm/i915/i915_hwmon.c | 53 +++++++++++++++++++ 3 files changed, 63 insertions(+) create mode 100644 Documentation/ABI/testing/sysfs-driver-intel-i915-hwmon diff --git a/Documentation/ABI/testing/sysfs-driver-intel-i915-hwmon b/Documentation/ABI/testing/sysfs-driver-intel-i915-hwmon new file mode 100644 index 000000000000..cd9554c1a4f8 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-driver-intel-i915-hwmon @@ -0,0 +1,7 @@ +What: /sys/devices/.../hwmon/hwmon/in0_input +Date: February 2023 +KernelVersion: 6.2 +Contact: dri-devel@lists.freedesktop.org +Description: RO. Current Voltage in millivolt. + + Only supported for particular Intel i915 graphics platforms. diff --git a/drivers/gpu/drm/i915/gt/intel_gt_regs.h b/drivers/gpu/drm/i915/gt/intel_gt_regs.h index 7f79bbf97828..fcf5f9012852 100644 --- a/drivers/gpu/drm/i915/gt/intel_gt_regs.h +++ b/drivers/gpu/drm/i915/gt/intel_gt_regs.h @@ -1519,6 +1519,9 @@ #define VLV_RENDER_C0_COUNT _MMIO(0x138118) #define VLV_MEDIA_C0_COUNT _MMIO(0x13811c) +#define GEN12_RPSTAT1 _MMIO(0x1381b4) +#define GEN12_VOLTAGE_MASK REG_GENMASK(10, 0) + #define GEN11_GT_INTR_DW(x) _MMIO(0x190018 + ((x) * 4)) #define GEN11_CSME (31) #define GEN11_GUNIT (28) diff --git a/drivers/gpu/drm/i915/i915_hwmon.c b/drivers/gpu/drm/i915/i915_hwmon.c index 231552fda374..9fcff6a884ee 100644 --- a/drivers/gpu/drm/i915/i915_hwmon.c +++ b/drivers/gpu/drm/i915/i915_hwmon.c @@ -11,8 +11,16 @@ #include "i915_hwmon.h" #include "i915_reg.h" #include "intel_mchbar_regs.h" +#include "gt/intel_gt_regs.h" + +/* + * SF_* - scale factors for particular quantities according to hwmon spec. + * - voltage - millivolts + */ +#define SF_VOLTAGE 1000 struct hwm_reg { + i915_reg_t gt_perf_status; }; struct hwm_drvdata { @@ -29,14 +37,49 @@ struct i915_hwmon { }; static const struct hwmon_channel_info *hwm_info[] = { + HWMON_CHANNEL_INFO(in, HWMON_I_INPUT), NULL }; +static umode_t +hwm_in_is_visible(const struct hwm_drvdata *ddat, u32 attr) +{ + switch (attr) { + case hwmon_in_input: + return i915_mmio_reg_valid(ddat->hwmon->rg.gt_perf_status) ? 0444 : 0; + default: + return 0; + } +} + +static int +hwm_in_read(struct hwm_drvdata *ddat, u32 attr, long *val) +{ + struct i915_hwmon *hwmon = ddat->hwmon; + intel_wakeref_t wakeref; + u32 reg_value; + + switch (attr) { + case hwmon_in_input: + with_intel_runtime_pm(ddat->uncore->rpm, wakeref) + reg_value = intel_uncore_read(ddat->uncore, hwmon->rg.gt_perf_status); + /* HW register value in units of 2.5 millivolt */ + *val = DIV_ROUND_CLOSEST(REG_FIELD_GET(GEN12_VOLTAGE_MASK, reg_value) * 25, 10); + return 0; + default: + return -EOPNOTSUPP; + } +} + static umode_t hwm_is_visible(const void *drvdata, enum hwmon_sensor_types type, u32 attr, int channel) { + struct hwm_drvdata *ddat = (struct hwm_drvdata *)drvdata; + switch (type) { + case hwmon_in: + return hwm_in_is_visible(ddat, attr); default: return 0; } @@ -46,7 +89,11 @@ static int hwm_read(struct device *dev, enum hwmon_sensor_types type, u32 attr, int channel, long *val) { + struct hwm_drvdata *ddat = dev_get_drvdata(dev); + switch (type) { + case hwmon_in: + return hwm_in_read(ddat, attr, val); default: return -EOPNOTSUPP; } @@ -76,6 +123,12 @@ static const struct hwmon_chip_info hwm_chip_info = { static void hwm_get_preregistration_info(struct drm_i915_private *i915) { + struct i915_hwmon *hwmon = i915->hwmon; + + if (IS_DG1(i915) || IS_DG2(i915)) + hwmon->rg.gt_perf_status = GEN12_RPSTAT1; + else + hwmon->rg.gt_perf_status = INVALID_MMIO_REG; } void i915_hwmon_register(struct drm_i915_private *i915) From patchwork Tue Sep 27 05:50:16 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Nilawar, Badal" X-Patchwork-Id: 12989878 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id E222AC07E9D for ; Tue, 27 Sep 2022 05:48:31 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id D21D310E8BE; Tue, 27 Sep 2022 05:48:20 +0000 (UTC) Received: from mga06.intel.com (mga06b.intel.com [134.134.136.31]) by gabe.freedesktop.org (Postfix) with ESMTPS id 3008110E438; Tue, 27 Sep 2022 05:47:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1664257669; x=1695793669; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=4PyQCq/80Ve6M8dEzm8Rw9hu6S6vX5Kgj8XDlbhq8IQ=; b=gONtoOBqq8DkX9mHXGCiTHHPGFrUirmgeCtN25bcNnary2UOWYBvBZw4 hyu+V90aP8AoY0yT9g9ad6ryEmRiA3GDnxiqG20Na9uSIorhI5Be78zyF RPgJ1ZPSTiDWtmaXaRPMkJfgY2uKfdSDYxN52d4BXKpgIYBa7dqQHrve6 ePCMAqRXJei7XMQWNhyu+B6yDV2o70qYJirKbxoBmScIn2LZRT+XjBXAC +PZmKVBPviueZfKMXja2JBgJ8iGStnP/ADabuh9pUVK4K2QvruWVpP1hX fqO8UE8GBgGy4/KX5kOleMtulMptfUBbXwduvp95VMCMkosFf9J3ua9u5 w==; X-IronPort-AV: E=McAfee;i="6500,9779,10482"; a="363066400" X-IronPort-AV: E=Sophos;i="5.93,348,1654585200"; d="scan'208";a="363066400" Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by orsmga104.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 26 Sep 2022 22:47:48 -0700 X-IronPort-AV: E=McAfee;i="6500,9779,10482"; a="725376826" X-IronPort-AV: E=Sophos;i="5.93,348,1654585200"; d="scan'208";a="725376826" Received: from bnilawar-desk1.iind.intel.com ([10.145.169.158]) by fmsmga002-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 26 Sep 2022 22:47:45 -0700 From: Badal Nilawar To: intel-gfx@lists.freedesktop.org Date: Tue, 27 Sep 2022 11:20:16 +0530 Message-Id: <20220927055020.3499420-4-badal.nilawar@intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220927055020.3499420-1-badal.nilawar@intel.com> References: <20220927055020.3499420-1-badal.nilawar@intel.com> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH 3/7] drm/i915/hwmon: Power PL1 limit and TDP setting X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-hwmon@vger.kernel.org, andi.shyti@intel.com, dri-devel@lists.freedesktop.org Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" From: Dale B Stimson Use i915 HWMON to display/modify dGfx power PL1 limit and TDP setting. v2: - Fix review comments (Ashutosh) - Do not restore power1_max upon module unload/load sequence because on production systems modules are always loaded and not unloaded/reloaded (Ashutosh) - Fix review comments (Jani) - Remove endianness conversion (Ashutosh) v3: Add power1_rated_max (Ashutosh) v4: - Use macro HWMON_CHANNEL_INFO to define power channel (Guenter) - Update the date and kernel version in Documentation (Badal) v5: Use hwm_ prefix for static functions (Ashutosh) v6: Fix review comments (Ashutosh) v7: - Define PCU_PACKAGE_POWER_SKU for DG1,DG2 and move PKG_PKG_TDP to intel_mchbar_regs.h (Anshuman) - KernelVersion: 6.2, Date: February 2023 in doc (Tvrtko) Cc: Guenter Roeck Signed-off-by: Dale B Stimson Signed-off-by: Ashutosh Dixit Signed-off-by: Riana Tauro Signed-off-by: Badal Nilawar Acked-by: Guenter Roeck Reviewed-by: Ashutosh Dixit Reviewed-by: Anshuman Gupta Reviewed-by: Andi Shyti --- .../ABI/testing/sysfs-driver-intel-i915-hwmon | 20 +++ drivers/gpu/drm/i915/i915_hwmon.c | 158 +++++++++++++++++- drivers/gpu/drm/i915/intel_mchbar_regs.h | 12 ++ 3 files changed, 188 insertions(+), 2 deletions(-) diff --git a/Documentation/ABI/testing/sysfs-driver-intel-i915-hwmon b/Documentation/ABI/testing/sysfs-driver-intel-i915-hwmon index cd9554c1a4f8..16e697b1db3d 100644 --- a/Documentation/ABI/testing/sysfs-driver-intel-i915-hwmon +++ b/Documentation/ABI/testing/sysfs-driver-intel-i915-hwmon @@ -5,3 +5,23 @@ Contact: dri-devel@lists.freedesktop.org Description: RO. Current Voltage in millivolt. Only supported for particular Intel i915 graphics platforms. + +What: /sys/devices/.../hwmon/hwmon/power1_max +Date: February 2023 +KernelVersion: 6.2 +Contact: dri-devel@lists.freedesktop.org +Description: RW. Card reactive sustained (PL1/Tau) power limit in microwatts. + + The power controller will throttle the operating frequency + if the power averaged over a window (typically seconds) + exceeds this limit. + + Only supported for particular Intel i915 graphics platforms. + +What: /sys/devices/.../hwmon/hwmon/power1_rated_max +Date: February 2023 +KernelVersion: 6.2 +Contact: dri-devel@lists.freedesktop.org +Description: RO. Card default power limit (default TDP setting). + + Only supported for particular Intel i915 graphics platforms. diff --git a/drivers/gpu/drm/i915/i915_hwmon.c b/drivers/gpu/drm/i915/i915_hwmon.c index 9fcff6a884ee..53d34a7a86f7 100644 --- a/drivers/gpu/drm/i915/i915_hwmon.c +++ b/drivers/gpu/drm/i915/i915_hwmon.c @@ -16,11 +16,16 @@ /* * SF_* - scale factors for particular quantities according to hwmon spec. * - voltage - millivolts + * - power - microwatts */ #define SF_VOLTAGE 1000 +#define SF_POWER 1000000 struct hwm_reg { i915_reg_t gt_perf_status; + i915_reg_t pkg_power_sku_unit; + i915_reg_t pkg_power_sku; + i915_reg_t pkg_rapl_limit; }; struct hwm_drvdata { @@ -34,10 +39,68 @@ struct i915_hwmon { struct hwm_drvdata ddat; struct mutex hwmon_lock; /* counter overflow logic and rmw */ struct hwm_reg rg; + int scl_shift_power; }; +static void +hwm_locked_with_pm_intel_uncore_rmw(struct hwm_drvdata *ddat, + i915_reg_t reg, u32 clear, u32 set) +{ + struct i915_hwmon *hwmon = ddat->hwmon; + struct intel_uncore *uncore = ddat->uncore; + intel_wakeref_t wakeref; + + mutex_lock(&hwmon->hwmon_lock); + + with_intel_runtime_pm(uncore->rpm, wakeref) + intel_uncore_rmw(uncore, reg, clear, set); + + mutex_unlock(&hwmon->hwmon_lock); +} + +/* + * This function's return type of u64 allows for the case where the scaling + * of the field taken from the 32-bit register value might cause a result to + * exceed 32 bits. + */ +static u64 +hwm_field_read_and_scale(struct hwm_drvdata *ddat, i915_reg_t rgadr, + u32 field_msk, int nshift, u32 scale_factor) +{ + struct intel_uncore *uncore = ddat->uncore; + intel_wakeref_t wakeref; + u32 reg_value; + + with_intel_runtime_pm(uncore->rpm, wakeref) + reg_value = intel_uncore_read(uncore, rgadr); + + reg_value = REG_FIELD_GET(field_msk, reg_value); + + return mul_u64_u32_shr(reg_value, scale_factor, nshift); +} + +static void +hwm_field_scale_and_write(struct hwm_drvdata *ddat, i915_reg_t rgadr, + u32 field_msk, int nshift, + unsigned int scale_factor, long lval) +{ + u32 nval; + u32 bits_to_clear; + u32 bits_to_set; + + /* Computation in 64-bits to avoid overflow. Round to nearest. */ + nval = DIV_ROUND_CLOSEST_ULL((u64)lval << nshift, scale_factor); + + bits_to_clear = field_msk; + bits_to_set = FIELD_PREP(field_msk, nval); + + hwm_locked_with_pm_intel_uncore_rmw(ddat, rgadr, + bits_to_clear, bits_to_set); +} + static const struct hwmon_channel_info *hwm_info[] = { HWMON_CHANNEL_INFO(in, HWMON_I_INPUT), + HWMON_CHANNEL_INFO(power, HWMON_P_MAX | HWMON_P_RATED_MAX), NULL }; @@ -71,6 +134,64 @@ hwm_in_read(struct hwm_drvdata *ddat, u32 attr, long *val) } } +static umode_t +hwm_power_is_visible(const struct hwm_drvdata *ddat, u32 attr, int chan) +{ + struct i915_hwmon *hwmon = ddat->hwmon; + + switch (attr) { + case hwmon_power_max: + return i915_mmio_reg_valid(hwmon->rg.pkg_rapl_limit) ? 0664 : 0; + case hwmon_power_rated_max: + return i915_mmio_reg_valid(hwmon->rg.pkg_power_sku) ? 0444 : 0; + default: + return 0; + } +} + +static int +hwm_power_read(struct hwm_drvdata *ddat, u32 attr, int chan, long *val) +{ + struct i915_hwmon *hwmon = ddat->hwmon; + + switch (attr) { + case hwmon_power_max: + *val = hwm_field_read_and_scale(ddat, + hwmon->rg.pkg_rapl_limit, + PKG_PWR_LIM_1, + hwmon->scl_shift_power, + SF_POWER); + return 0; + case hwmon_power_rated_max: + *val = hwm_field_read_and_scale(ddat, + hwmon->rg.pkg_power_sku, + PKG_PKG_TDP, + hwmon->scl_shift_power, + SF_POWER); + return 0; + default: + return -EOPNOTSUPP; + } +} + +static int +hwm_power_write(struct hwm_drvdata *ddat, u32 attr, int chan, long val) +{ + struct i915_hwmon *hwmon = ddat->hwmon; + + switch (attr) { + case hwmon_power_max: + hwm_field_scale_and_write(ddat, + hwmon->rg.pkg_rapl_limit, + PKG_PWR_LIM_1, + hwmon->scl_shift_power, + SF_POWER, val); + return 0; + default: + return -EOPNOTSUPP; + } +} + static umode_t hwm_is_visible(const void *drvdata, enum hwmon_sensor_types type, u32 attr, int channel) @@ -80,6 +201,8 @@ hwm_is_visible(const void *drvdata, enum hwmon_sensor_types type, switch (type) { case hwmon_in: return hwm_in_is_visible(ddat, attr); + case hwmon_power: + return hwm_power_is_visible(ddat, attr, channel); default: return 0; } @@ -94,6 +217,8 @@ hwm_read(struct device *dev, enum hwmon_sensor_types type, u32 attr, switch (type) { case hwmon_in: return hwm_in_read(ddat, attr, val); + case hwmon_power: + return hwm_power_read(ddat, attr, channel, val); default: return -EOPNOTSUPP; } @@ -103,7 +228,11 @@ static int hwm_write(struct device *dev, enum hwmon_sensor_types type, u32 attr, int channel, long val) { + struct hwm_drvdata *ddat = dev_get_drvdata(dev); + switch (type) { + case hwmon_power: + return hwm_power_write(ddat, attr, channel, val); default: return -EOPNOTSUPP; } @@ -124,11 +253,36 @@ static void hwm_get_preregistration_info(struct drm_i915_private *i915) { struct i915_hwmon *hwmon = i915->hwmon; + struct intel_uncore *uncore = &i915->uncore; + intel_wakeref_t wakeref; + u32 val_sku_unit; - if (IS_DG1(i915) || IS_DG2(i915)) + if (IS_DG1(i915) || IS_DG2(i915)) { hwmon->rg.gt_perf_status = GEN12_RPSTAT1; - else + hwmon->rg.pkg_power_sku_unit = PCU_PACKAGE_POWER_SKU_UNIT; + hwmon->rg.pkg_power_sku = PCU_PACKAGE_POWER_SKU; + hwmon->rg.pkg_rapl_limit = PCU_PACKAGE_RAPL_LIMIT; + } else { hwmon->rg.gt_perf_status = INVALID_MMIO_REG; + hwmon->rg.pkg_power_sku_unit = INVALID_MMIO_REG; + hwmon->rg.pkg_power_sku = INVALID_MMIO_REG; + hwmon->rg.pkg_rapl_limit = INVALID_MMIO_REG; + } + + with_intel_runtime_pm(uncore->rpm, wakeref) { + /* + * The contents of register hwmon->rg.pkg_power_sku_unit do not change, + * so read it once and store the shift values. + */ + if (i915_mmio_reg_valid(hwmon->rg.pkg_power_sku_unit)) { + val_sku_unit = intel_uncore_read(uncore, + hwmon->rg.pkg_power_sku_unit); + } else { + val_sku_unit = 0; + } + + hwmon->scl_shift_power = REG_FIELD_GET(PKG_PWR_UNIT, val_sku_unit); + } } void i915_hwmon_register(struct drm_i915_private *i915) diff --git a/drivers/gpu/drm/i915/intel_mchbar_regs.h b/drivers/gpu/drm/i915/intel_mchbar_regs.h index ffc702b79579..d7e2e4711792 100644 --- a/drivers/gpu/drm/i915/intel_mchbar_regs.h +++ b/drivers/gpu/drm/i915/intel_mchbar_regs.h @@ -189,6 +189,16 @@ #define DG1_QCLK_RATIO_MASK REG_GENMASK(9, 2) #define DG1_QCLK_REFERENCE REG_BIT(10) +/* + * *_PACKAGE_POWER_SKU - SKU power and timing parameters. + */ +#define PCU_PACKAGE_POWER_SKU _MMIO(MCHBAR_MIRROR_BASE_SNB + 0x5930) +#define PKG_PKG_TDP GENMASK_ULL(14, 0) + +#define PCU_PACKAGE_POWER_SKU_UNIT _MMIO(MCHBAR_MIRROR_BASE_SNB + 0x5938) +#define PKG_PWR_UNIT REG_GENMASK(3, 0) +#define PKG_TIME_UNIT REG_GENMASK(19, 16) + #define GEN6_GT_PERF_STATUS _MMIO(MCHBAR_MIRROR_BASE_SNB + 0x5948) #define GEN6_RP_STATE_LIMITS _MMIO(MCHBAR_MIRROR_BASE_SNB + 0x5994) #define GEN6_RP_STATE_CAP _MMIO(MCHBAR_MIRROR_BASE_SNB + 0x5998) @@ -198,6 +208,8 @@ #define GEN10_FREQ_INFO_REC _MMIO(MCHBAR_MIRROR_BASE_SNB + 0x5ef0) #define RPE_MASK REG_GENMASK(15, 8) +#define PCU_PACKAGE_RAPL_LIMIT _MMIO(MCHBAR_MIRROR_BASE_SNB + 0x59a0) +#define PKG_PWR_LIM_1 REG_GENMASK(14, 0) /* snb MCH registers for priority tuning */ #define MCH_SSKPD _MMIO(MCHBAR_MIRROR_BASE_SNB + 0x5d10) From patchwork Tue Sep 27 05:50:17 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Nilawar, Badal" X-Patchwork-Id: 12989875 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 0AFBEC54EE9 for ; Tue, 27 Sep 2022 05:48:27 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 19A5410E567; Tue, 27 Sep 2022 05:48:16 +0000 (UTC) Received: from mga06.intel.com (mga06b.intel.com [134.134.136.31]) by gabe.freedesktop.org (Postfix) with ESMTPS id 4DA1F10E438; Tue, 27 Sep 2022 05:47:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1664257672; x=1695793672; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=6IoBAgEaLC4W0qU52Z8graBLjCzoTkKJRU/uumt1zQM=; b=hjhrOcOT18L1uUlJVFjdaAaDfd5ZsXjVMjF91TBprjRgZ6M13MAG/xqg WwgTPubbHQJ3iLw+lfYbOLBnN8eG1/hpKUDmhlDObiH4o79ygp7yhyeFZ JhzJ9SKNDlqsIsfqmw3HEycJpBYp/s+DM10YRJdXY2O1DieCkfdUW/q5B K9yjmChPJLlokqgUkdzQMJUfvKGD0b6i1XUO76wmU3IDv8HIRxS5otamK ltA1KOsUKFqYS9diKrH2f8zcRLqimgdNILq0/5++DViouyOdKW/yGlnVP wpJfHrVCz5j97CP8ugexhv/6MDMyMQ3O1oQJJXwGOFcEmWvUprE5N2LIq Q==; X-IronPort-AV: E=McAfee;i="6500,9779,10482"; a="363066406" X-IronPort-AV: E=Sophos;i="5.93,348,1654585200"; d="scan'208";a="363066406" Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by orsmga104.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 26 Sep 2022 22:47:51 -0700 X-IronPort-AV: E=McAfee;i="6500,9779,10482"; a="725376837" X-IronPort-AV: E=Sophos;i="5.93,348,1654585200"; d="scan'208";a="725376837" Received: from bnilawar-desk1.iind.intel.com ([10.145.169.158]) by fmsmga002-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 26 Sep 2022 22:47:48 -0700 From: Badal Nilawar To: intel-gfx@lists.freedesktop.org Date: Tue, 27 Sep 2022 11:20:17 +0530 Message-Id: <20220927055020.3499420-5-badal.nilawar@intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220927055020.3499420-1-badal.nilawar@intel.com> References: <20220927055020.3499420-1-badal.nilawar@intel.com> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH 4/7] drm/i915/hwmon: Show device level energy usage X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-hwmon@vger.kernel.org, andi.shyti@intel.com, dri-devel@lists.freedesktop.org Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" From: Dale B Stimson Use i915 HWMON to display device level energy input. v2: Updated the date and kernel version in feature description v3: - Cleaned up hwm_energy function and removed unused function i915_hwmon_energy_status_get (Ashutosh) v4: KernelVersion: 6.2, Date: February 2023 in doc (Tvrtko) Signed-off-by: Dale B Stimson Signed-off-by: Ashutosh Dixit Signed-off-by: Riana Tauro Signed-off-by: Badal Nilawar Acked-by: Guenter Roeck Reviewed-by: Ashutosh Dixit Reviewed-by: Anshuman Gupta --- .../ABI/testing/sysfs-driver-intel-i915-hwmon | 8 ++ drivers/gpu/drm/i915/i915_hwmon.c | 107 +++++++++++++++++- drivers/gpu/drm/i915/intel_mchbar_regs.h | 2 + 3 files changed, 115 insertions(+), 2 deletions(-) diff --git a/Documentation/ABI/testing/sysfs-driver-intel-i915-hwmon b/Documentation/ABI/testing/sysfs-driver-intel-i915-hwmon index 16e697b1db3d..7525db243d74 100644 --- a/Documentation/ABI/testing/sysfs-driver-intel-i915-hwmon +++ b/Documentation/ABI/testing/sysfs-driver-intel-i915-hwmon @@ -25,3 +25,11 @@ Contact: dri-devel@lists.freedesktop.org Description: RO. Card default power limit (default TDP setting). Only supported for particular Intel i915 graphics platforms. + +What: /sys/devices/.../hwmon/hwmon/energy1_input +Date: February 2023 +KernelVersion: 6.2 +Contact: dri-devel@lists.freedesktop.org +Description: RO. Energy input of device in microjoules. + + Only supported for particular Intel i915 graphics platforms. diff --git a/drivers/gpu/drm/i915/i915_hwmon.c b/drivers/gpu/drm/i915/i915_hwmon.c index 53d34a7a86f7..9a49521b358a 100644 --- a/drivers/gpu/drm/i915/i915_hwmon.c +++ b/drivers/gpu/drm/i915/i915_hwmon.c @@ -17,21 +17,30 @@ * SF_* - scale factors for particular quantities according to hwmon spec. * - voltage - millivolts * - power - microwatts + * - energy - microjoules */ #define SF_VOLTAGE 1000 #define SF_POWER 1000000 +#define SF_ENERGY 1000000 struct hwm_reg { i915_reg_t gt_perf_status; i915_reg_t pkg_power_sku_unit; i915_reg_t pkg_power_sku; i915_reg_t pkg_rapl_limit; + i915_reg_t energy_status_all; +}; + +struct hwm_energy_info { + u32 reg_val_prev; + long accum_energy; /* Accumulated energy for energy1_input */ }; struct hwm_drvdata { struct i915_hwmon *hwmon; struct intel_uncore *uncore; struct device *hwmon_dev; + struct hwm_energy_info ei; /* Energy info for energy1_input */ char name[12]; }; @@ -40,6 +49,7 @@ struct i915_hwmon { struct mutex hwmon_lock; /* counter overflow logic and rmw */ struct hwm_reg rg; int scl_shift_power; + int scl_shift_energy; }; static void @@ -98,9 +108,60 @@ hwm_field_scale_and_write(struct hwm_drvdata *ddat, i915_reg_t rgadr, bits_to_clear, bits_to_set); } +/* + * hwm_energy - Obtain energy value + * + * The underlying energy hardware register is 32-bits and is subject to + * overflow. How long before overflow? For example, with an example + * scaling bit shift of 14 bits (see register *PACKAGE_POWER_SKU_UNIT) and + * a power draw of 1000 watts, the 32-bit counter will overflow in + * approximately 4.36 minutes. + * + * Examples: + * 1 watt: (2^32 >> 14) / 1 W / (60 * 60 * 24) secs/day -> 3 days + * 1000 watts: (2^32 >> 14) / 1000 W / 60 secs/min -> 4.36 minutes + * + * The function significantly increases overflow duration (from 4.36 + * minutes) by accumulating the energy register into a 'long' as allowed by + * the hwmon API. Using x86_64 128 bit arithmetic (see mul_u64_u32_shr()), + * a 'long' of 63 bits, SF_ENERGY of 1e6 (~20 bits) and + * hwmon->scl_shift_energy of 14 bits we have 57 (63 - 20 + 14) bits before + * energy1_input overflows. This at 1000 W is an overflow duration of 278 years. + */ +static int +hwm_energy(struct hwm_drvdata *ddat, long *energy) +{ + struct intel_uncore *uncore = ddat->uncore; + struct i915_hwmon *hwmon = ddat->hwmon; + struct hwm_energy_info *ei = &ddat->ei; + intel_wakeref_t wakeref; + i915_reg_t rgaddr; + u32 reg_val; + + rgaddr = hwmon->rg.energy_status_all; + + mutex_lock(&hwmon->hwmon_lock); + + with_intel_runtime_pm(uncore->rpm, wakeref) + reg_val = intel_uncore_read(uncore, rgaddr); + + if (reg_val >= ei->reg_val_prev) + ei->accum_energy += reg_val - ei->reg_val_prev; + else + ei->accum_energy += UINT_MAX - ei->reg_val_prev + reg_val; + ei->reg_val_prev = reg_val; + + *energy = mul_u64_u32_shr(ei->accum_energy, SF_ENERGY, + hwmon->scl_shift_energy); + mutex_unlock(&hwmon->hwmon_lock); + + return 0; +} + static const struct hwmon_channel_info *hwm_info[] = { HWMON_CHANNEL_INFO(in, HWMON_I_INPUT), HWMON_CHANNEL_INFO(power, HWMON_P_MAX | HWMON_P_RATED_MAX), + HWMON_CHANNEL_INFO(energy, HWMON_E_INPUT), NULL }; @@ -192,6 +253,32 @@ hwm_power_write(struct hwm_drvdata *ddat, u32 attr, int chan, long val) } } +static umode_t +hwm_energy_is_visible(const struct hwm_drvdata *ddat, u32 attr) +{ + struct i915_hwmon *hwmon = ddat->hwmon; + i915_reg_t rgaddr; + + switch (attr) { + case hwmon_energy_input: + rgaddr = hwmon->rg.energy_status_all; + return i915_mmio_reg_valid(rgaddr) ? 0444 : 0; + default: + return 0; + } +} + +static int +hwm_energy_read(struct hwm_drvdata *ddat, u32 attr, long *val) +{ + switch (attr) { + case hwmon_energy_input: + return hwm_energy(ddat, val); + default: + return -EOPNOTSUPP; + } +} + static umode_t hwm_is_visible(const void *drvdata, enum hwmon_sensor_types type, u32 attr, int channel) @@ -203,6 +290,8 @@ hwm_is_visible(const void *drvdata, enum hwmon_sensor_types type, return hwm_in_is_visible(ddat, attr); case hwmon_power: return hwm_power_is_visible(ddat, attr, channel); + case hwmon_energy: + return hwm_energy_is_visible(ddat, attr); default: return 0; } @@ -219,6 +308,8 @@ hwm_read(struct device *dev, enum hwmon_sensor_types type, u32 attr, return hwm_in_read(ddat, attr, val); case hwmon_power: return hwm_power_read(ddat, attr, channel, val); + case hwmon_energy: + return hwm_energy_read(ddat, attr, val); default: return -EOPNOTSUPP; } @@ -254,19 +345,23 @@ hwm_get_preregistration_info(struct drm_i915_private *i915) { struct i915_hwmon *hwmon = i915->hwmon; struct intel_uncore *uncore = &i915->uncore; + struct hwm_drvdata *ddat = &hwmon->ddat; intel_wakeref_t wakeref; u32 val_sku_unit; + long energy; if (IS_DG1(i915) || IS_DG2(i915)) { hwmon->rg.gt_perf_status = GEN12_RPSTAT1; hwmon->rg.pkg_power_sku_unit = PCU_PACKAGE_POWER_SKU_UNIT; hwmon->rg.pkg_power_sku = PCU_PACKAGE_POWER_SKU; hwmon->rg.pkg_rapl_limit = PCU_PACKAGE_RAPL_LIMIT; + hwmon->rg.energy_status_all = PCU_PACKAGE_ENERGY_STATUS; } else { hwmon->rg.gt_perf_status = INVALID_MMIO_REG; hwmon->rg.pkg_power_sku_unit = INVALID_MMIO_REG; hwmon->rg.pkg_power_sku = INVALID_MMIO_REG; hwmon->rg.pkg_rapl_limit = INVALID_MMIO_REG; + hwmon->rg.energy_status_all = INVALID_MMIO_REG; } with_intel_runtime_pm(uncore->rpm, wakeref) { @@ -280,9 +375,17 @@ hwm_get_preregistration_info(struct drm_i915_private *i915) } else { val_sku_unit = 0; } - - hwmon->scl_shift_power = REG_FIELD_GET(PKG_PWR_UNIT, val_sku_unit); } + + hwmon->scl_shift_power = REG_FIELD_GET(PKG_PWR_UNIT, val_sku_unit); + hwmon->scl_shift_energy = REG_FIELD_GET(PKG_ENERGY_UNIT, val_sku_unit); + + /* + * Initialize 'struct hwm_energy_info', i.e. set fields to the + * first value of the energy register read + */ + if (i915_mmio_reg_valid(hwmon->rg.energy_status_all)) + hwm_energy(ddat, &energy); } void i915_hwmon_register(struct drm_i915_private *i915) diff --git a/drivers/gpu/drm/i915/intel_mchbar_regs.h b/drivers/gpu/drm/i915/intel_mchbar_regs.h index d7e2e4711792..bd42fb66e297 100644 --- a/drivers/gpu/drm/i915/intel_mchbar_regs.h +++ b/drivers/gpu/drm/i915/intel_mchbar_regs.h @@ -197,7 +197,9 @@ #define PCU_PACKAGE_POWER_SKU_UNIT _MMIO(MCHBAR_MIRROR_BASE_SNB + 0x5938) #define PKG_PWR_UNIT REG_GENMASK(3, 0) +#define PKG_ENERGY_UNIT REG_GENMASK(12, 8) #define PKG_TIME_UNIT REG_GENMASK(19, 16) +#define PCU_PACKAGE_ENERGY_STATUS _MMIO(MCHBAR_MIRROR_BASE_SNB + 0x593c) #define GEN6_GT_PERF_STATUS _MMIO(MCHBAR_MIRROR_BASE_SNB + 0x5948) #define GEN6_RP_STATE_LIMITS _MMIO(MCHBAR_MIRROR_BASE_SNB + 0x5994) From patchwork Tue Sep 27 05:50:18 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Nilawar, Badal" X-Patchwork-Id: 12989879 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 98130C6FA83 for ; Tue, 27 Sep 2022 05:48:33 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id DA68F10E8C0; Tue, 27 Sep 2022 05:48:20 +0000 (UTC) Received: from mga06.intel.com (mga06b.intel.com [134.134.136.31]) by gabe.freedesktop.org (Postfix) with ESMTPS id 4E39310E438; Tue, 27 Sep 2022 05:47:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1664257675; x=1695793675; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=EE3WqG4lyG3ghTDmGGh65/XmUYbgcL2jGiWK/76q2pk=; b=M3s3zEIOiuspyZ02pkbg0aC2umXvlC6vnXhdC+G8U2SLAQ1SDNfpmh+G thYwvxpYIGliGlcxPNv2ln6ik9SuYe141QclMKd+oYJF1Z/JcOoc9s//P efEHZwcU3iYySX9X3M6RWPdFBgUYzTcC6N3yJIwxomPhURUpAVKUSZ40V /jsAkeKtAgIA5Cw1Hfad3SDxFpUWkM8wUVLM+B7HK10yjW3VqInnxNkdr 2nhHuRnI1ikYyr0yO3mNxugLig6LST9BGMobzalkqhfIMxpKB1EtkQLSo d7udHssqucFlihYwlee3JxEGMxzPkR8HaVteYlp4MMfGfwQ87rne4VKTP w==; X-IronPort-AV: E=McAfee;i="6500,9779,10482"; a="363066409" X-IronPort-AV: E=Sophos;i="5.93,348,1654585200"; d="scan'208";a="363066409" Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by orsmga104.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 26 Sep 2022 22:47:54 -0700 X-IronPort-AV: E=McAfee;i="6500,9779,10482"; a="725376849" X-IronPort-AV: E=Sophos;i="5.93,348,1654585200"; d="scan'208";a="725376849" Received: from bnilawar-desk1.iind.intel.com ([10.145.169.158]) by fmsmga002-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 26 Sep 2022 22:47:52 -0700 From: Badal Nilawar To: intel-gfx@lists.freedesktop.org Date: Tue, 27 Sep 2022 11:20:18 +0530 Message-Id: <20220927055020.3499420-6-badal.nilawar@intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220927055020.3499420-1-badal.nilawar@intel.com> References: <20220927055020.3499420-1-badal.nilawar@intel.com> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH 5/7] drm/i915/hwmon: Expose card reactive critical power X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-hwmon@vger.kernel.org, andi.shyti@intel.com, dri-devel@lists.freedesktop.org Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" From: Ashutosh Dixit Expose the card reactive critical (I1) power. I1 is exposed as power1_crit in microwatts (typically for client products) or as curr1_crit in milliamperes (typically for server). v2: Add curr1_crit functionality (Ashutosh) v3: Use HWMON_CHANNEL_INFO to define power1_crit, curr1_crit (Badal) v4: Use hwm_ prefix for static functions (Ashutosh) v5: KernelVersion: 6.2, Date: February 2023 in doc (Tvrtko) Cc: Sujaritha Sundaresan Signed-off-by: Ashutosh Dixit Signed-off-by: Badal Nilawar Acked-by: Guenter Roeck Reviewed-by: Anshuman Gupta --- .../ABI/testing/sysfs-driver-intel-i915-hwmon | 26 +++++ drivers/gpu/drm/i915/i915_hwmon.c | 95 ++++++++++++++++++- drivers/gpu/drm/i915/i915_reg.h | 6 ++ 3 files changed, 126 insertions(+), 1 deletion(-) diff --git a/Documentation/ABI/testing/sysfs-driver-intel-i915-hwmon b/Documentation/ABI/testing/sysfs-driver-intel-i915-hwmon index 7525db243d74..f9d6d3b08bba 100644 --- a/Documentation/ABI/testing/sysfs-driver-intel-i915-hwmon +++ b/Documentation/ABI/testing/sysfs-driver-intel-i915-hwmon @@ -26,6 +26,32 @@ Description: RO. Card default power limit (default TDP setting). Only supported for particular Intel i915 graphics platforms. +What: /sys/devices/.../hwmon/hwmon/power1_crit +Date: February 2023 +KernelVersion: 6.2 +Contact: dri-devel@lists.freedesktop.org +Description: RW. Card reactive critical (I1) power limit in microwatts. + + Card reactive critical (I1) power limit in microwatts is exposed + for client products. The power controller will throttle the + operating frequency if the power averaged over a window exceeds + this limit. + + Only supported for particular Intel i915 graphics platforms. + +What: /sys/devices/.../hwmon/hwmon/curr1_crit +Date: February 2023 +KernelVersion: 6.2 +Contact: dri-devel@lists.freedesktop.org +Description: RW. Card reactive critical (I1) power limit in milliamperes. + + Card reactive critical (I1) power limit in milliamperes is + exposed for server products. The power controller will throttle + the operating frequency if the power averaged over a window + exceeds this limit. + + Only supported for particular Intel i915 graphics platforms. + What: /sys/devices/.../hwmon/hwmon/energy1_input Date: February 2023 KernelVersion: 6.2 diff --git a/drivers/gpu/drm/i915/i915_hwmon.c b/drivers/gpu/drm/i915/i915_hwmon.c index 9a49521b358a..2394fa789793 100644 --- a/drivers/gpu/drm/i915/i915_hwmon.c +++ b/drivers/gpu/drm/i915/i915_hwmon.c @@ -11,16 +11,19 @@ #include "i915_hwmon.h" #include "i915_reg.h" #include "intel_mchbar_regs.h" +#include "intel_pcode.h" #include "gt/intel_gt_regs.h" /* * SF_* - scale factors for particular quantities according to hwmon spec. * - voltage - millivolts * - power - microwatts + * - curr - milliamperes * - energy - microjoules */ #define SF_VOLTAGE 1000 #define SF_POWER 1000000 +#define SF_CURR 1000 #define SF_ENERGY 1000000 struct hwm_reg { @@ -160,11 +163,25 @@ hwm_energy(struct hwm_drvdata *ddat, long *energy) static const struct hwmon_channel_info *hwm_info[] = { HWMON_CHANNEL_INFO(in, HWMON_I_INPUT), - HWMON_CHANNEL_INFO(power, HWMON_P_MAX | HWMON_P_RATED_MAX), + HWMON_CHANNEL_INFO(power, HWMON_P_MAX | HWMON_P_RATED_MAX | HWMON_P_CRIT), HWMON_CHANNEL_INFO(energy, HWMON_E_INPUT), + HWMON_CHANNEL_INFO(curr, HWMON_C_CRIT), NULL }; +/* I1 is exposed as power_crit or as curr_crit depending on bit 31 */ +static int hwm_pcode_read_i1(struct drm_i915_private *i915, u32 *uval) +{ + return snb_pcode_read_p(&i915->uncore, PCODE_POWER_SETUP, + POWER_SETUP_SUBCOMMAND_READ_I1, 0, uval); +} + +static int hwm_pcode_write_i1(struct drm_i915_private *i915, u32 uval) +{ + return snb_pcode_write_p(&i915->uncore, PCODE_POWER_SETUP, + POWER_SETUP_SUBCOMMAND_WRITE_I1, 0, uval); +} + static umode_t hwm_in_is_visible(const struct hwm_drvdata *ddat, u32 attr) { @@ -198,13 +215,18 @@ hwm_in_read(struct hwm_drvdata *ddat, u32 attr, long *val) static umode_t hwm_power_is_visible(const struct hwm_drvdata *ddat, u32 attr, int chan) { + struct drm_i915_private *i915 = ddat->uncore->i915; struct i915_hwmon *hwmon = ddat->hwmon; + u32 uval; switch (attr) { case hwmon_power_max: return i915_mmio_reg_valid(hwmon->rg.pkg_rapl_limit) ? 0664 : 0; case hwmon_power_rated_max: return i915_mmio_reg_valid(hwmon->rg.pkg_power_sku) ? 0444 : 0; + case hwmon_power_crit: + return (hwm_pcode_read_i1(i915, &uval) || + !(uval & POWER_SETUP_I1_WATTS)) ? 0 : 0644; default: return 0; } @@ -214,6 +236,8 @@ static int hwm_power_read(struct hwm_drvdata *ddat, u32 attr, int chan, long *val) { struct i915_hwmon *hwmon = ddat->hwmon; + int ret; + u32 uval; switch (attr) { case hwmon_power_max: @@ -230,6 +254,15 @@ hwm_power_read(struct hwm_drvdata *ddat, u32 attr, int chan, long *val) hwmon->scl_shift_power, SF_POWER); return 0; + case hwmon_power_crit: + ret = hwm_pcode_read_i1(ddat->uncore->i915, &uval); + if (ret) + return ret; + if (!(uval & POWER_SETUP_I1_WATTS)) + return -ENODEV; + *val = mul_u64_u32_shr(REG_FIELD_GET(POWER_SETUP_I1_DATA_MASK, uval), + SF_POWER, POWER_SETUP_I1_SHIFT); + return 0; default: return -EOPNOTSUPP; } @@ -239,6 +272,7 @@ static int hwm_power_write(struct hwm_drvdata *ddat, u32 attr, int chan, long val) { struct i915_hwmon *hwmon = ddat->hwmon; + u32 uval; switch (attr) { case hwmon_power_max: @@ -248,6 +282,9 @@ hwm_power_write(struct hwm_drvdata *ddat, u32 attr, int chan, long val) hwmon->scl_shift_power, SF_POWER, val); return 0; + case hwmon_power_crit: + uval = DIV_ROUND_CLOSEST_ULL(val << POWER_SETUP_I1_SHIFT, SF_POWER); + return hwm_pcode_write_i1(ddat->uncore->i915, uval); default: return -EOPNOTSUPP; } @@ -279,6 +316,56 @@ hwm_energy_read(struct hwm_drvdata *ddat, u32 attr, long *val) } } +static umode_t +hwm_curr_is_visible(const struct hwm_drvdata *ddat, u32 attr) +{ + struct drm_i915_private *i915 = ddat->uncore->i915; + u32 uval; + + switch (attr) { + case hwmon_curr_crit: + return (hwm_pcode_read_i1(i915, &uval) || + (uval & POWER_SETUP_I1_WATTS)) ? 0 : 0644; + default: + return 0; + } +} + +static int +hwm_curr_read(struct hwm_drvdata *ddat, u32 attr, long *val) +{ + int ret; + u32 uval; + + switch (attr) { + case hwmon_curr_crit: + ret = hwm_pcode_read_i1(ddat->uncore->i915, &uval); + if (ret) + return ret; + if (uval & POWER_SETUP_I1_WATTS) + return -ENODEV; + *val = mul_u64_u32_shr(REG_FIELD_GET(POWER_SETUP_I1_DATA_MASK, uval), + SF_CURR, POWER_SETUP_I1_SHIFT); + return 0; + default: + return -EOPNOTSUPP; + } +} + +static int +hwm_curr_write(struct hwm_drvdata *ddat, u32 attr, long val) +{ + u32 uval; + + switch (attr) { + case hwmon_curr_crit: + uval = DIV_ROUND_CLOSEST_ULL(val << POWER_SETUP_I1_SHIFT, SF_CURR); + return hwm_pcode_write_i1(ddat->uncore->i915, uval); + default: + return -EOPNOTSUPP; + } +} + static umode_t hwm_is_visible(const void *drvdata, enum hwmon_sensor_types type, u32 attr, int channel) @@ -292,6 +379,8 @@ hwm_is_visible(const void *drvdata, enum hwmon_sensor_types type, return hwm_power_is_visible(ddat, attr, channel); case hwmon_energy: return hwm_energy_is_visible(ddat, attr); + case hwmon_curr: + return hwm_curr_is_visible(ddat, attr); default: return 0; } @@ -310,6 +399,8 @@ hwm_read(struct device *dev, enum hwmon_sensor_types type, u32 attr, return hwm_power_read(ddat, attr, channel, val); case hwmon_energy: return hwm_energy_read(ddat, attr, val); + case hwmon_curr: + return hwm_curr_read(ddat, attr, val); default: return -EOPNOTSUPP; } @@ -324,6 +415,8 @@ hwm_write(struct device *dev, enum hwmon_sensor_types type, u32 attr, switch (type) { case hwmon_power: return hwm_power_write(ddat, attr, channel, val); + case hwmon_curr: + return hwm_curr_write(ddat, attr, val); default: return -EOPNOTSUPP; } diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index 5003a5ffbc6a..ff3b352c51cd 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -6655,6 +6655,12 @@ #define DG1_PCODE_STATUS 0x7E #define DG1_UNCORE_GET_INIT_STATUS 0x0 #define DG1_UNCORE_INIT_STATUS_COMPLETE 0x1 +#define PCODE_POWER_SETUP 0x7C +#define POWER_SETUP_SUBCOMMAND_READ_I1 0x4 +#define POWER_SETUP_SUBCOMMAND_WRITE_I1 0x5 +#define POWER_SETUP_I1_WATTS REG_BIT(31) +#define POWER_SETUP_I1_SHIFT 6 /* 10.6 fixed point format */ +#define POWER_SETUP_I1_DATA_MASK REG_GENMASK(15, 0) #define GEN12_PCODE_READ_SAGV_BLOCK_TIME_US 0x23 #define XEHP_PCODE_FREQUENCY_CONFIG 0x6e /* xehpsdv, pvc */ /* XEHP_PCODE_FREQUENCY_CONFIG sub-commands (param1) */ From patchwork Tue Sep 27 05:50:19 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Nilawar, Badal" X-Patchwork-Id: 12989876 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id B8904C07E9D for ; Tue, 27 Sep 2022 05:48:28 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id B87B610E8A7; Tue, 27 Sep 2022 05:48:17 +0000 (UTC) Received: from mga06.intel.com (mga06b.intel.com [134.134.136.31]) by gabe.freedesktop.org (Postfix) with ESMTPS id 5817810E43B; Tue, 27 Sep 2022 05:47:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1664257678; x=1695793678; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=EC+xkcqTY6nm3VNh4vHiVrDESdrXABBUnqVDfHmnF7s=; b=FoSN7gq2/EBUdsHEBOka/aCeR8aotJq/TLoox3YrF6DYpAeWsrEuuQA8 989qbWkVjMhEs5zqAhBFhsgpY/8PltQTbEmVljHBtiCMQxznK/okACEBO 6BgpF0kTFymEXj1xLLOdDi5JU9fjxElAvTEmdG8+k7t3TXCVjiO+SV63k /eyt5krxW3aSRwp2bP6GY7gYtWLYbtopzo6Iyt4zxBtgnNp/PK/BIBuRv h9xxMNt+McZCoiF4UIsMZHYpVryFXCHX5q9ytkrsgd0mz/Ifys4oymWd5 33x5RAbH/HQ+/O4cjGU+YYnJUK2Qfe9hWjEfrGQ58c3unjA5A9G4bnq1+ Q==; X-IronPort-AV: E=McAfee;i="6500,9779,10482"; a="363066421" X-IronPort-AV: E=Sophos;i="5.93,348,1654585200"; d="scan'208";a="363066421" Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by orsmga104.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 26 Sep 2022 22:47:58 -0700 X-IronPort-AV: E=McAfee;i="6500,9779,10482"; a="725376865" X-IronPort-AV: E=Sophos;i="5.93,348,1654585200"; d="scan'208";a="725376865" Received: from bnilawar-desk1.iind.intel.com ([10.145.169.158]) by fmsmga002-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 26 Sep 2022 22:47:55 -0700 From: Badal Nilawar To: intel-gfx@lists.freedesktop.org Date: Tue, 27 Sep 2022 11:20:19 +0530 Message-Id: <20220927055020.3499420-7-badal.nilawar@intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220927055020.3499420-1-badal.nilawar@intel.com> References: <20220927055020.3499420-1-badal.nilawar@intel.com> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH 6/7] drm/i915/hwmon: Expose power1_max_interval X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-hwmon@vger.kernel.org, andi.shyti@intel.com, dri-devel@lists.freedesktop.org Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" From: Ashutosh Dixit Expose power1_max_interval, that is the tau corresponding to PL1, as a custom hwmon attribute. Some bit manipulation is needed because of the format of PKG_PWR_LIM_1_TIME in GT0_PACKAGE_RAPL_LIMIT register (1.x * power(2,y)). v2: Update date and kernel version in Documentation (Badal) v3: Cleaned up hwm_power1_max_interval_store() (Badal) v4: - Fixed review comments (Anshuman) - In hwm_power1_max_interval_store() get PKG_MAX_WIN from pkg_power_sku when it is valid (Ashutosh) - KernelVersion: 6.2, Date: February 2023 in doc (Tvrtko) v5: On some of the DGFX setups it is seen that although pkg_power_sku is valid the field PKG_WIN_MAX is not populated. So it is decided to stick to default value of PKG_WIN_MAX (Ashutosh) Signed-off-by: Ashutosh Dixit Signed-off-by: Badal Nilawar Acked-by: Guenter Roeck Reviewed-by: Anshuman Gupta --- .../ABI/testing/sysfs-driver-intel-i915-hwmon | 9 ++ drivers/gpu/drm/i915/i915_hwmon.c | 115 +++++++++++++++++- drivers/gpu/drm/i915/intel_mchbar_regs.h | 7 ++ 3 files changed, 130 insertions(+), 1 deletion(-) diff --git a/Documentation/ABI/testing/sysfs-driver-intel-i915-hwmon b/Documentation/ABI/testing/sysfs-driver-intel-i915-hwmon index f9d6d3b08bba..19b9fe3ef237 100644 --- a/Documentation/ABI/testing/sysfs-driver-intel-i915-hwmon +++ b/Documentation/ABI/testing/sysfs-driver-intel-i915-hwmon @@ -26,6 +26,15 @@ Description: RO. Card default power limit (default TDP setting). Only supported for particular Intel i915 graphics platforms. +What: /sys/devices/.../hwmon/hwmon/power1_max_interval +Date: February 2023 +KernelVersion: 6.2 +Contact: dri-devel@lists.freedesktop.org +Description: RW. Sustained power limit interval (Tau in PL1/Tau) in + milliseconds over which sustained power is averaged. + + Only supported for particular Intel i915 graphics platforms. + What: /sys/devices/.../hwmon/hwmon/power1_crit Date: February 2023 KernelVersion: 6.2 diff --git a/drivers/gpu/drm/i915/i915_hwmon.c b/drivers/gpu/drm/i915/i915_hwmon.c index 2394fa789793..641143956c45 100644 --- a/drivers/gpu/drm/i915/i915_hwmon.c +++ b/drivers/gpu/drm/i915/i915_hwmon.c @@ -20,11 +20,13 @@ * - power - microwatts * - curr - milliamperes * - energy - microjoules + * - time - milliseconds */ #define SF_VOLTAGE 1000 #define SF_POWER 1000000 #define SF_CURR 1000 #define SF_ENERGY 1000000 +#define SF_TIME 1000 struct hwm_reg { i915_reg_t gt_perf_status; @@ -53,6 +55,7 @@ struct i915_hwmon { struct hwm_reg rg; int scl_shift_power; int scl_shift_energy; + int scl_shift_time; }; static void @@ -161,6 +164,115 @@ hwm_energy(struct hwm_drvdata *ddat, long *energy) return 0; } +static ssize_t +hwm_power1_max_interval_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct hwm_drvdata *ddat = dev_get_drvdata(dev); + struct i915_hwmon *hwmon = ddat->hwmon; + intel_wakeref_t wakeref; + u32 r, x, y, x_w = 2; /* 2 bits */ + u64 tau4, out; + + with_intel_runtime_pm(ddat->uncore->rpm, wakeref) + r = intel_uncore_read(ddat->uncore, hwmon->rg.pkg_rapl_limit); + + x = REG_FIELD_GET(PKG_PWR_LIM_1_TIME_X, r); + y = REG_FIELD_GET(PKG_PWR_LIM_1_TIME_Y, r); + /* + * tau = 1.x * power(2,y), x = bits(23:22), y = bits(21:17) + * = (4 | x) << (y - 2) + * where (y - 2) ensures a 1.x fixed point representation of 1.x + * However because y can be < 2, we compute + * tau4 = (4 | x) << y + * but add 2 when doing the final right shift to account for units + */ + tau4 = ((1 << x_w) | x) << y; + /* val in hwmon interface units (millisec) */ + out = mul_u64_u32_shr(tau4, SF_TIME, hwmon->scl_shift_time + x_w); + + return sysfs_emit(buf, "%llu\n", out); +} + +static ssize_t +hwm_power1_max_interval_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct hwm_drvdata *ddat = dev_get_drvdata(dev); + struct i915_hwmon *hwmon = ddat->hwmon; + long val, max_win, ret; + u32 x, y, rxy, x_w = 2; /* 2 bits */ + u64 tau4, r; + +#define PKG_MAX_WIN_DEFAULT 0x12ull + + ret = kstrtoul(buf, 0, &val); + if (ret) + return ret; + + /* + * val must be < max in hwmon interface units. The steps below are + * explained in i915_power1_max_interval_show() + */ + r = FIELD_PREP(PKG_MAX_WIN, PKG_MAX_WIN_DEFAULT); + + x = REG_FIELD_GET(PKG_MAX_WIN_X, r); + y = REG_FIELD_GET(PKG_MAX_WIN_Y, r); + tau4 = ((1 << x_w) | x) << y; + max_win = mul_u64_u32_shr(tau4, SF_TIME, hwmon->scl_shift_time + x_w); + + if (val > max_win) + return -EINVAL; + + /* val in hw units */ + val = DIV_ROUND_CLOSEST_ULL((u64)val << hwmon->scl_shift_time, SF_TIME); + /* Convert to 1.x * power(2,y) */ + if (!val) + return -EINVAL; + y = ilog2(val); + /* x = (val - (1 << y)) >> (y - 2); */ + x = (val - (1ul << y)) << x_w >> y; + + rxy = REG_FIELD_PREP(PKG_PWR_LIM_1_TIME_X, x) | REG_FIELD_PREP(PKG_PWR_LIM_1_TIME_Y, y); + + hwm_locked_with_pm_intel_uncore_rmw(ddat, hwmon->rg.pkg_rapl_limit, + PKG_PWR_LIM_1_TIME, rxy); + return count; +} + +static SENSOR_DEVICE_ATTR(power1_max_interval, 0664, + hwm_power1_max_interval_show, + hwm_power1_max_interval_store, 0); + +static struct attribute *hwm_attributes[] = { + &sensor_dev_attr_power1_max_interval.dev_attr.attr, + NULL +}; + +static umode_t hwm_attributes_visible(struct kobject *kobj, + struct attribute *attr, int index) +{ + struct device *dev = kobj_to_dev(kobj); + struct hwm_drvdata *ddat = dev_get_drvdata(dev); + struct i915_hwmon *hwmon = ddat->hwmon; + + if (attr == &sensor_dev_attr_power1_max_interval.dev_attr.attr) + return i915_mmio_reg_valid(hwmon->rg.pkg_rapl_limit) ? attr->mode : 0; + else + return 0; +} + +static const struct attribute_group hwm_attrgroup = { + .attrs = hwm_attributes, + .is_visible = hwm_attributes_visible, +}; + +static const struct attribute_group *hwm_groups[] = { + &hwm_attrgroup, + NULL +}; + static const struct hwmon_channel_info *hwm_info[] = { HWMON_CHANNEL_INFO(in, HWMON_I_INPUT), HWMON_CHANNEL_INFO(power, HWMON_P_MAX | HWMON_P_RATED_MAX | HWMON_P_CRIT), @@ -472,6 +584,7 @@ hwm_get_preregistration_info(struct drm_i915_private *i915) hwmon->scl_shift_power = REG_FIELD_GET(PKG_PWR_UNIT, val_sku_unit); hwmon->scl_shift_energy = REG_FIELD_GET(PKG_ENERGY_UNIT, val_sku_unit); + hwmon->scl_shift_time = REG_FIELD_GET(PKG_TIME_UNIT, val_sku_unit); /* * Initialize 'struct hwm_energy_info', i.e. set fields to the @@ -510,7 +623,7 @@ void i915_hwmon_register(struct drm_i915_private *i915) hwmon_dev = devm_hwmon_device_register_with_info(dev, ddat->name, ddat, &hwm_chip_info, - NULL); + hwm_groups); if (IS_ERR(hwmon_dev)) { i915->hwmon = NULL; return; diff --git a/drivers/gpu/drm/i915/intel_mchbar_regs.h b/drivers/gpu/drm/i915/intel_mchbar_regs.h index bd42fb66e297..64aa1e9be463 100644 --- a/drivers/gpu/drm/i915/intel_mchbar_regs.h +++ b/drivers/gpu/drm/i915/intel_mchbar_regs.h @@ -194,6 +194,9 @@ */ #define PCU_PACKAGE_POWER_SKU _MMIO(MCHBAR_MIRROR_BASE_SNB + 0x5930) #define PKG_PKG_TDP GENMASK_ULL(14, 0) +#define PKG_MAX_WIN GENMASK_ULL(54, 48) +#define PKG_MAX_WIN_X GENMASK_ULL(54, 53) +#define PKG_MAX_WIN_Y GENMASK_ULL(52, 48) #define PCU_PACKAGE_POWER_SKU_UNIT _MMIO(MCHBAR_MIRROR_BASE_SNB + 0x5938) #define PKG_PWR_UNIT REG_GENMASK(3, 0) @@ -212,6 +215,10 @@ #define RPE_MASK REG_GENMASK(15, 8) #define PCU_PACKAGE_RAPL_LIMIT _MMIO(MCHBAR_MIRROR_BASE_SNB + 0x59a0) #define PKG_PWR_LIM_1 REG_GENMASK(14, 0) +#define PKG_PWR_LIM_1_EN REG_BIT(15) +#define PKG_PWR_LIM_1_TIME REG_GENMASK(23, 17) +#define PKG_PWR_LIM_1_TIME_X REG_GENMASK(23, 22) +#define PKG_PWR_LIM_1_TIME_Y REG_GENMASK(21, 17) /* snb MCH registers for priority tuning */ #define MCH_SSKPD _MMIO(MCHBAR_MIRROR_BASE_SNB + 0x5d10) From patchwork Tue Sep 27 05:50:20 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Nilawar, Badal" X-Patchwork-Id: 12989877 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 5782AC6FA83 for ; Tue, 27 Sep 2022 05:48:30 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id E6C9710E56E; Tue, 27 Sep 2022 05:48:19 +0000 (UTC) Received: from mga06.intel.com (mga06b.intel.com [134.134.136.31]) by gabe.freedesktop.org (Postfix) with ESMTPS id 6093410E438; Tue, 27 Sep 2022 05:48:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1664257681; x=1695793681; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=Hd35ku3m7EDG1I4an6H9d1QzFUopqt4XornHaLuGhqA=; b=HBd+Iyx/T4sj5GiYv4hJYGEij5GWEX8FBrFzFSr4LKXUf54k9KsUbWUh WEXFXNUA+K5mqpm96HOqcTWNtIl9iU63ts4jtJjbZQ8zsYS61CsdZ+g4Y w3BaFnQCqNVF1KJquLZPYGzDenjFUwzV21VBB4mGc8m+5hdAlqxJ+2Dl9 o6AuY/QD/6xfqAibdAt/7rw5xAk9uowmABKC5Iaw3BeLb2iM7LSVRGSeR BVy+VQ/AhBh/05M7Dit7O3LOQjI0w1iVR7iAYHDhN4rNH962qbDyclfbX W30GBMJeK95oxioccsM4OZwikZO20s+HyyvdKCebh0qGLbJu21ermEWZn Q==; X-IronPort-AV: E=McAfee;i="6500,9779,10482"; a="363066430" X-IronPort-AV: E=Sophos;i="5.93,348,1654585200"; d="scan'208";a="363066430" Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by orsmga104.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 26 Sep 2022 22:48:01 -0700 X-IronPort-AV: E=McAfee;i="6500,9779,10482"; a="725376876" X-IronPort-AV: E=Sophos;i="5.93,348,1654585200"; d="scan'208";a="725376876" Received: from bnilawar-desk1.iind.intel.com ([10.145.169.158]) by fmsmga002-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 26 Sep 2022 22:47:58 -0700 From: Badal Nilawar To: intel-gfx@lists.freedesktop.org Date: Tue, 27 Sep 2022 11:20:20 +0530 Message-Id: <20220927055020.3499420-8-badal.nilawar@intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220927055020.3499420-1-badal.nilawar@intel.com> References: <20220927055020.3499420-1-badal.nilawar@intel.com> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH 7/7] drm/i915/hwmon: Extend power/energy for XEHPSDV X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-hwmon@vger.kernel.org, andi.shyti@intel.com, dri-devel@lists.freedesktop.org Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" From: Dale B Stimson Extend hwmon power/energy for XEHPSDV especially per gt level energy usage. v2: Update to latest HWMON spec (Ashutosh) v3: Fix review comments (Ashutosh) v4: Fix review comments (Anshuman) v5: s/hwmon_device_register_with_info/ devm_hwmon_device_register_with_info/ (Ashutosh) Signed-off-by: Ashutosh Dixit Signed-off-by: Dale B Stimson Signed-off-by: Badal Nilawar Acked-by: Guenter Roeck Reviewed-by: Ashutosh Dixit Reviewed-by: Anshuman Gupta Reviewed-by: Andi Shyti --- .../ABI/testing/sysfs-driver-intel-i915-hwmon | 7 +- drivers/gpu/drm/i915/gt/intel_gt_regs.h | 5 + drivers/gpu/drm/i915/i915_hwmon.c | 102 +++++++++++++++++- 3 files changed, 111 insertions(+), 3 deletions(-) diff --git a/Documentation/ABI/testing/sysfs-driver-intel-i915-hwmon b/Documentation/ABI/testing/sysfs-driver-intel-i915-hwmon index 19b9fe3ef237..dbd16b0f56d0 100644 --- a/Documentation/ABI/testing/sysfs-driver-intel-i915-hwmon +++ b/Documentation/ABI/testing/sysfs-driver-intel-i915-hwmon @@ -65,6 +65,11 @@ What: /sys/devices/.../hwmon/hwmon/energy1_input Date: February 2023 KernelVersion: 6.2 Contact: dri-devel@lists.freedesktop.org -Description: RO. Energy input of device in microjoules. +Description: RO. Energy input of device or gt in microjoules. + + For i915 device level hwmon devices (name "i915") this + reflects energy input for the entire device. For gt level + hwmon devices (name "i915_gtN") this reflects energy input + for the gt. Only supported for particular Intel i915 graphics platforms. diff --git a/drivers/gpu/drm/i915/gt/intel_gt_regs.h b/drivers/gpu/drm/i915/gt/intel_gt_regs.h index fcf5f9012852..30458f1cf0dd 100644 --- a/drivers/gpu/drm/i915/gt/intel_gt_regs.h +++ b/drivers/gpu/drm/i915/gt/intel_gt_regs.h @@ -1592,6 +1592,11 @@ #define GEN12_SFC_DONE(n) _MMIO(0x1cc000 + (n) * 0x1000) +#define GT0_PACKAGE_ENERGY_STATUS _MMIO(0x250004) +#define GT0_PACKAGE_RAPL_LIMIT _MMIO(0x250008) +#define GT0_PACKAGE_POWER_SKU_UNIT _MMIO(0x250068) +#define GT0_PLATFORM_ENERGY_STATUS _MMIO(0x25006c) + /* * Standalone Media's non-engine GT registers are located at their regular GT * offsets plus 0x380000. This extra offset is stored inside the intel_uncore diff --git a/drivers/gpu/drm/i915/i915_hwmon.c b/drivers/gpu/drm/i915/i915_hwmon.c index 641143956c45..d80bc569ebcf 100644 --- a/drivers/gpu/drm/i915/i915_hwmon.c +++ b/drivers/gpu/drm/i915/i915_hwmon.c @@ -12,6 +12,7 @@ #include "i915_reg.h" #include "intel_mchbar_regs.h" #include "intel_pcode.h" +#include "gt/intel_gt.h" #include "gt/intel_gt_regs.h" /* @@ -34,6 +35,7 @@ struct hwm_reg { i915_reg_t pkg_power_sku; i915_reg_t pkg_rapl_limit; i915_reg_t energy_status_all; + i915_reg_t energy_status_tile; }; struct hwm_energy_info { @@ -47,10 +49,12 @@ struct hwm_drvdata { struct device *hwmon_dev; struct hwm_energy_info ei; /* Energy info for energy1_input */ char name[12]; + int gt_n; }; struct i915_hwmon { struct hwm_drvdata ddat; + struct hwm_drvdata ddat_gt[I915_MAX_GT]; struct mutex hwmon_lock; /* counter overflow logic and rmw */ struct hwm_reg rg; int scl_shift_power; @@ -144,7 +148,10 @@ hwm_energy(struct hwm_drvdata *ddat, long *energy) i915_reg_t rgaddr; u32 reg_val; - rgaddr = hwmon->rg.energy_status_all; + if (ddat->gt_n >= 0) + rgaddr = hwmon->rg.energy_status_tile; + else + rgaddr = hwmon->rg.energy_status_all; mutex_lock(&hwmon->hwmon_lock); @@ -281,6 +288,11 @@ static const struct hwmon_channel_info *hwm_info[] = { NULL }; +static const struct hwmon_channel_info *hwm_gt_info[] = { + HWMON_CHANNEL_INFO(energy, HWMON_E_INPUT), + NULL +}; + /* I1 is exposed as power_crit or as curr_crit depending on bit 31 */ static int hwm_pcode_read_i1(struct drm_i915_private *i915, u32 *uval) { @@ -410,7 +422,10 @@ hwm_energy_is_visible(const struct hwm_drvdata *ddat, u32 attr) switch (attr) { case hwmon_energy_input: - rgaddr = hwmon->rg.energy_status_all; + if (ddat->gt_n >= 0) + rgaddr = hwmon->rg.energy_status_tile; + else + rgaddr = hwmon->rg.energy_status_all; return i915_mmio_reg_valid(rgaddr) ? 0444 : 0; default: return 0; @@ -545,6 +560,44 @@ static const struct hwmon_chip_info hwm_chip_info = { .info = hwm_info, }; +static umode_t +hwm_gt_is_visible(const void *drvdata, enum hwmon_sensor_types type, + u32 attr, int channel) +{ + struct hwm_drvdata *ddat = (struct hwm_drvdata *)drvdata; + + switch (type) { + case hwmon_energy: + return hwm_energy_is_visible(ddat, attr); + default: + return 0; + } +} + +static int +hwm_gt_read(struct device *dev, enum hwmon_sensor_types type, u32 attr, + int channel, long *val) +{ + struct hwm_drvdata *ddat = dev_get_drvdata(dev); + + switch (type) { + case hwmon_energy: + return hwm_energy_read(ddat, attr, val); + default: + return -EOPNOTSUPP; + } +} + +static const struct hwmon_ops hwm_gt_ops = { + .is_visible = hwm_gt_is_visible, + .read = hwm_gt_read, +}; + +static const struct hwmon_chip_info hwm_gt_chip_info = { + .ops = &hwm_gt_ops, + .info = hwm_gt_info, +}; + static void hwm_get_preregistration_info(struct drm_i915_private *i915) { @@ -553,7 +606,9 @@ hwm_get_preregistration_info(struct drm_i915_private *i915) struct hwm_drvdata *ddat = &hwmon->ddat; intel_wakeref_t wakeref; u32 val_sku_unit; + struct intel_gt *gt; long energy; + int i; if (IS_DG1(i915) || IS_DG2(i915)) { hwmon->rg.gt_perf_status = GEN12_RPSTAT1; @@ -561,12 +616,21 @@ hwm_get_preregistration_info(struct drm_i915_private *i915) hwmon->rg.pkg_power_sku = PCU_PACKAGE_POWER_SKU; hwmon->rg.pkg_rapl_limit = PCU_PACKAGE_RAPL_LIMIT; hwmon->rg.energy_status_all = PCU_PACKAGE_ENERGY_STATUS; + hwmon->rg.energy_status_tile = INVALID_MMIO_REG; + } else if (IS_XEHPSDV(i915)) { + hwmon->rg.pkg_power_sku_unit = GT0_PACKAGE_POWER_SKU_UNIT; + hwmon->rg.pkg_power_sku = INVALID_MMIO_REG; + hwmon->rg.pkg_rapl_limit = GT0_PACKAGE_RAPL_LIMIT; + hwmon->rg.energy_status_all = GT0_PLATFORM_ENERGY_STATUS; + hwmon->rg.energy_status_tile = GT0_PACKAGE_ENERGY_STATUS; + hwmon->rg.gt_perf_status = INVALID_MMIO_REG; } else { hwmon->rg.gt_perf_status = INVALID_MMIO_REG; hwmon->rg.pkg_power_sku_unit = INVALID_MMIO_REG; hwmon->rg.pkg_power_sku = INVALID_MMIO_REG; hwmon->rg.pkg_rapl_limit = INVALID_MMIO_REG; hwmon->rg.energy_status_all = INVALID_MMIO_REG; + hwmon->rg.energy_status_tile = INVALID_MMIO_REG; } with_intel_runtime_pm(uncore->rpm, wakeref) { @@ -592,6 +656,10 @@ hwm_get_preregistration_info(struct drm_i915_private *i915) */ if (i915_mmio_reg_valid(hwmon->rg.energy_status_all)) hwm_energy(ddat, &energy); + if (i915_mmio_reg_valid(hwmon->rg.energy_status_tile)) { + for_each_gt(gt, i915, i) + hwm_energy(&hwmon->ddat_gt[i], &energy); + } } void i915_hwmon_register(struct drm_i915_private *i915) @@ -600,6 +668,9 @@ void i915_hwmon_register(struct drm_i915_private *i915) struct i915_hwmon *hwmon; struct device *hwmon_dev; struct hwm_drvdata *ddat; + struct hwm_drvdata *ddat_gt; + struct intel_gt *gt; + int i; /* hwmon is available only for dGfx */ if (!IS_DGFX(i915)) @@ -616,6 +687,16 @@ void i915_hwmon_register(struct drm_i915_private *i915) ddat->hwmon = hwmon; ddat->uncore = &i915->uncore; snprintf(ddat->name, sizeof(ddat->name), "i915"); + ddat->gt_n = -1; + + for_each_gt(gt, i915, i) { + ddat_gt = hwmon->ddat_gt + i; + + ddat_gt->hwmon = hwmon; + ddat_gt->uncore = gt->uncore; + snprintf(ddat_gt->name, sizeof(ddat_gt->name), "i915_gt%u", i); + ddat_gt->gt_n = i; + } hwm_get_preregistration_info(i915); @@ -630,6 +711,23 @@ void i915_hwmon_register(struct drm_i915_private *i915) } ddat->hwmon_dev = hwmon_dev; + + for_each_gt(gt, i915, i) { + ddat_gt = hwmon->ddat_gt + i; + /* + * Create per-gt directories only if a per-gt attribute is + * visible. Currently this is only energy + */ + if (!hwm_gt_is_visible(ddat_gt, hwmon_energy, hwmon_energy_input, 0)) + continue; + + hwmon_dev = devm_hwmon_device_register_with_info(dev, ddat_gt->name, + ddat_gt, + &hwm_gt_chip_info, + NULL); + if (!IS_ERR(hwmon_dev)) + ddat_gt->hwmon_dev = hwmon_dev; + } } void i915_hwmon_unregister(struct drm_i915_private *i915)