From patchwork Fri Sep 23 19:56:42 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Nilawar, Badal" X-Patchwork-Id: 12986941 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 517C6C07E9D for ; Fri, 23 Sep 2022 19:54:49 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 8EEBA10E905; Fri, 23 Sep 2022 19:54:48 +0000 (UTC) Received: from mga11.intel.com (mga11.intel.com [192.55.52.93]) by gabe.freedesktop.org (Postfix) with ESMTPS id ED6B610E8D0; Fri, 23 Sep 2022 19:54:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1663962882; x=1695498882; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=UiPPkMBFMJ6NZR5JbtKb4i9Kn+t3Cv/3NDi4QU4xHrI=; b=k6bM1JXdiUhTTwMnacIuYBVoMJoGk1J22Aeeg2kN97pjoo4HRMSodG6W s9r7lZWpgSJXimPdChUN0mnB7xgCBH09oZcx3bcJQsuJqgoHf5L6oJTUT KxmwR8hRmQ1Mnc2rH3Utdb+j5jEt2eEbtx3h2+T4UpuBFHaU2sa8l92Gq 8YZrVqs55LhnOvcvtaPqNNWANM1vAAbF8/mrfbinRFdzkOvjycqM1Zqv9 JYBlZcXD5z2mFLO/5mBvFf5BgTuCeVgQagH2AXeV9ViCcQyaYHTZIsc9S xev9FSUWofxCznWoudviDSF0Yez6/ta7lRc8+3kiZ0PCF9R50Igc9cqJR A==; X-IronPort-AV: E=McAfee;i="6500,9779,10479"; a="298281589" X-IronPort-AV: E=Sophos;i="5.93,340,1654585200"; d="scan'208";a="298281589" Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by fmsmga102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 23 Sep 2022 12:54:24 -0700 X-IronPort-AV: E=Sophos;i="5.93,340,1654585200"; d="scan'208";a="709424449" Received: from bnilawar-desk1.iind.intel.com ([10.145.169.158]) by fmsmga003-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 23 Sep 2022 12:54:21 -0700 From: Badal Nilawar To: intel-gfx@lists.freedesktop.org Date: Sat, 24 Sep 2022 01:26:42 +0530 Message-Id: <20220923195643.2376927-7-badal.nilawar@intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220923195643.2376927-1-badal.nilawar@intel.com> References: <20220923195643.2376927-1-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. 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) Signed-off-by: Ashutosh Dixit Signed-off-by: Badal Nilawar Acked-by: Guenter Roeck --- .../ABI/testing/sysfs-driver-intel-i915-hwmon | 9 ++ drivers/gpu/drm/i915/i915_hwmon.c | 120 +++++++++++++++++- drivers/gpu/drm/i915/intel_mchbar_regs.h | 7 + 3 files changed, 135 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 f743ac5c59c4..b95f54d274be 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 +164,120 @@ 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; + intel_wakeref_t wakeref; + 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() + */ + if (i915_mmio_reg_valid(hwmon->rg.pkg_power_sku)) + with_intel_runtime_pm(ddat->uncore->rpm, wakeref) + r = intel_uncore_read64(ddat->uncore, hwmon->rg.pkg_power_sku); + else + 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 +589,7 @@ 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 +628,7 @@ void i915_hwmon_register(struct drm_i915_private *i915) hwmon_dev = 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)