From patchwork Mon Sep 26 17:52:05 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: "Nilawar, Badal" X-Patchwork-Id: 12989156 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 AAA7DC32771 for ; Mon, 26 Sep 2022 17:49:37 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id E452010E4C0; Mon, 26 Sep 2022 17:49:36 +0000 (UTC) Received: from mga02.intel.com (mga02.intel.com [134.134.136.20]) by gabe.freedesktop.org (Postfix) with ESMTPS id 40DEF10E4C0; Mon, 26 Sep 2022 17:49:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1664214571; x=1695750571; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=/e+/qkwPrTEcpE5jdFwc9Af5BI/mNT8i1RHqg7Wxh6I=; b=XQmC2bpb40V0aHZScfRFXkHGmp0X5ru0bb8qiVtTI3cPL5E1MvZMCwnA dOHzEymoggNP3tnpacz9HJN42TWg6gNPPhkmZnn2jB8nFbcxL23aMjEtH eolpu8Q3EIvzvrKnb0bdKCT87/af6CQJXqwZ0KTekmG3E4qRnTjo5wFuK pWkVIOQ2Nzsf52sEW4DQicKryitbmHYtrURerDe5HCq2TPmzx7Ib0YbZ8 KHZWi6rL4NQdk3u9XZSRX5VcatAhyqcG0RQvbTteBlopYDG/oL2R4aPbo P0CMVSTqYUYr5o4hCDa2c+gvO4OdLTtLiwxTWJZNsnfN1gBSt1JIIkR+K g==; X-IronPort-AV: E=McAfee;i="6500,9779,10482"; a="288240068" X-IronPort-AV: E=Sophos;i="5.93,346,1654585200"; d="scan'208";a="288240068" Received: from orsmga001.jf.intel.com ([10.7.209.18]) by orsmga101.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 26 Sep 2022 10:49:31 -0700 X-IronPort-AV: E=McAfee;i="6500,9779,10482"; a="654367073" X-IronPort-AV: E=Sophos;i="5.93,346,1654585200"; d="scan'208";a="654367073" Received: from bnilawar-desk1.iind.intel.com ([10.145.169.158]) by orsmga001-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 26 Sep 2022 10:49:27 -0700 From: Badal Nilawar To: intel-gfx@lists.freedesktop.org Date: Mon, 26 Sep 2022 23:22:05 +0530 Message-Id: <20220926175211.3473371-2-badal.nilawar@intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220926175211.3473371-1-badal.nilawar@intel.com> References: <20220926175211.3473371-1-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 --- 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__ */