From patchwork Thu Aug 25 13:21:16 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Nilawar, Badal" X-Patchwork-Id: 12954676 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 19B83C3F6B0 for ; Thu, 25 Aug 2022 13:19:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241220AbiHYNTg (ORCPT ); Thu, 25 Aug 2022 09:19:36 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39258 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S241948AbiHYNTf (ORCPT ); Thu, 25 Aug 2022 09:19:35 -0400 Received: from mga04.intel.com (mga04.intel.com [192.55.52.120]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 123F9B1B89 for ; Thu, 25 Aug 2022 06:19:28 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1661433568; x=1692969568; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=60kPWWTdkkX9Z/QKjQ4or1k9DlMSPnbxMaWVzEfJBA8=; b=K6FrObA3+P+dlNM2xOEtHcQj479VvjSVgNzi/f3m8szg7y680rDbt+qC KfrYy8z056GrvEe3AfM/uSADWNUcxWB2+RKxgWIEqDl+YzWDFeEjFJ+LC WSwewmwMrW4kYhciqRrvT7aseP81jATPm8lmag89Q5xCmKVAskazHJXnD tLYGcJZGcrF409y+hVV7kf5SgCu7sxWUdXSGhO2/VU8r5D/SRH/qMsc8Z TVNsMRd9QIQ+VLzIFRh4zimUe6qSufX3OK830mkVHAA0aCeQPQN0/19X7 Rk5uF1cmkA9LttFaDCF5V8lcExPZOMplB4oxBBklAI+CulNIDM3v3OSzq g==; X-IronPort-AV: E=McAfee;i="6500,9779,10450"; a="292977027" X-IronPort-AV: E=Sophos;i="5.93,263,1654585200"; d="scan'208";a="292977027" Received: from fmsmga008.fm.intel.com ([10.253.24.58]) by fmsmga104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 25 Aug 2022 06:19:27 -0700 X-IronPort-AV: E=Sophos;i="5.93,263,1654585200"; d="scan'208";a="670974948" Received: from bnilawar-desk1.iind.intel.com ([10.145.169.158]) by fmsmga008-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 25 Aug 2022 06:19:25 -0700 From: Badal Nilawar To: intel-gfx@lists.freedesktop.org Cc: ashutosh.dixit@intel.com, riana.tauro@intel.com, anshuman.gupta@intel.com, jon.ewins@intel.com, linux-hwmon@vger.kernel.org Subject: [PATCH 5/7] drm/i915/hwmon: Expose card reactive critical power Date: Thu, 25 Aug 2022 18:51:16 +0530 Message-Id: <20220825132118.784407-6-badal.nilawar@intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220825132118.784407-1-badal.nilawar@intel.com> References: <20220825132118.784407-1-badal.nilawar@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-hwmon@vger.kernel.org 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) - Update date and kernel version in Documentation. v4: Use hwm_ prefix for static functions (Ashutosh) Cc: Sujaritha Sundaresan Signed-off-by: Ashutosh Dixit Signed-off-by: Badal Nilawar Acked-by: Guenter Roeck --- .../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 03d71c6869d3..bb1101757154 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: June 2022 +KernelVersion: 5.19 +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: June 2022 +KernelVersion: 5.19 +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: June 2022 KernelVersion: 5.19 diff --git a/drivers/gpu/drm/i915/i915_hwmon.c b/drivers/gpu/drm/i915/i915_hwmon.c index e35f125be242..e476c8a9351b 100644 --- a/drivers/gpu/drm/i915/i915_hwmon.c +++ b/drivers/gpu/drm/i915/i915_hwmon.c @@ -11,14 +11,17 @@ #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. * - power - microwatts + * - curr - milliamperes * - energy - microjoules */ #define SF_POWER 1000000 +#define SF_CURR 1000 #define SF_ENERGY 1000000 #define FIELD_SHIFT(__mask) \ @@ -176,11 +179,25 @@ i915_hwmon_energy_status_get(struct drm_i915_private *i915, 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) { @@ -214,13 +231,18 @@ 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; } @@ -230,6 +252,8 @@ 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: @@ -248,6 +272,15 @@ 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; } @@ -257,6 +290,7 @@ 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: @@ -267,6 +301,9 @@ 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; } @@ -298,6 +335,56 @@ 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) @@ -311,6 +398,8 @@ 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; } @@ -329,6 +418,8 @@ 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; } @@ -343,6 +434,8 @@ 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 fd13411a28d9..6f72e7285e64 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -6676,6 +6676,12 @@ #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) */