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spf=none smtp.mailfrom=intel-gfx-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 653B86E9BF; Wed, 21 Jul 2021 17:42:33 +0000 (UTC) Received: from mga01.intel.com (mga01.intel.com [192.55.52.88]) by gabe.freedesktop.org (Postfix) with ESMTPS id EDCDF6E873; Wed, 21 Jul 2021 17:42:31 +0000 (UTC) X-IronPort-AV: E=McAfee;i="6200,9189,10052"; a="233290141" X-IronPort-AV: E=Sophos;i="5.84,258,1620716400"; d="scan'208";a="233290141" Received: from orsmga005.jf.intel.com ([10.7.209.41]) by fmsmga101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 21 Jul 2021 10:42:30 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.84,258,1620716400"; d="scan'208";a="632715195" Received: from irvmail001.ir.intel.com ([10.43.11.63]) by orsmga005.jf.intel.com with ESMTP; 21 Jul 2021 10:42:29 -0700 Received: from [10.249.140.99] (mwajdecz-MOBL.ger.corp.intel.com [10.249.140.99]) by irvmail001.ir.intel.com (8.14.3/8.13.6/MailSET/Hub) with ESMTP id 16LHgS9J003910; Wed, 21 Jul 2021 18:42:28 +0100 To: Vinay Belgaumkar , intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org References: <20210721161120.24610-1-vinay.belgaumkar@intel.com> <20210721161120.24610-8-vinay.belgaumkar@intel.com> From: Michal Wajdeczko Message-ID: Date: Wed, 21 Jul 2021 19:42:27 +0200 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Firefox/78.0 Thunderbird/78.12.0 MIME-Version: 1.0 In-Reply-To: <20210721161120.24610-8-vinay.belgaumkar@intel.com> Content-Language: en-US Subject: Re: [Intel-gfx] [PATCH 07/14] drm/i915/guc/slpc: Add methods to set min/max frequency 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: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" On 21.07.2021 18:11, Vinay Belgaumkar wrote: > Add param set h2g helpers to set the min and max frequencies > for use by SLPC. > > v2: Address review comments (Michal W) > > Signed-off-by: Sundaresan Sujaritha > Signed-off-by: Vinay Belgaumkar > --- > drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c | 84 +++++++++++++++++++++ > drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.h | 2 + > 2 files changed, 86 insertions(+) > > diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c b/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c > index 48db2a8f67d1..b40c39ba4049 100644 > --- a/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c > +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c > @@ -109,6 +109,18 @@ static u32 slpc_get_state(struct intel_guc_slpc *slpc) > return data->header.global_state; > } > > +static int guc_action_slpc_set_param(struct intel_guc *guc, u8 id, u32 value) > +{ > + u32 request[] = { > + INTEL_GUC_ACTION_SLPC_REQUEST, > + SLPC_EVENT(SLPC_EVENT_PARAMETER_SET, 2), > + id, > + value, > + }; > + > + return intel_guc_send(guc, request, ARRAY_SIZE(request)); beware of possible non-zero data0 returned by guc_send() > +} > + > static bool slpc_is_running(struct intel_guc_slpc *slpc) > { > return (slpc_get_state(slpc) == SLPC_GLOBAL_STATE_RUNNING); > @@ -143,6 +155,15 @@ static int slpc_query_task_state(struct intel_guc_slpc *slpc) > return ret; > } > > +static int slpc_set_param(struct intel_guc_slpc *slpc, u8 id, u32 value) > +{ > + struct intel_guc *guc = slpc_to_guc(slpc); > + > + GEM_BUG_ON(id >= SLPC_MAX_PARAM); > + > + return guc_action_slpc_set_param(guc, id, value); > +} > + > static const char *slpc_state_string(struct intel_guc_slpc *slpc) > { > const char *str = NULL; > @@ -238,6 +259,69 @@ u32 slpc_decode_max_freq(struct intel_guc_slpc *slpc) > GT_FREQUENCY_MULTIPLIER, GEN9_FREQ_SCALER); > } > > +/** > + * intel_guc_slpc_set_max_freq() - Set max frequency limit for SLPC. > + * @slpc: pointer to intel_guc_slpc. > + * @val: frequency (MHz) > + * > + * This function will invoke GuC SLPC action to update the max frequency > + * limit for unslice. > + * > + * Return: 0 on success, non-zero error code on failure. > + */ > +int intel_guc_slpc_set_max_freq(struct intel_guc_slpc *slpc, u32 val) > +{ > + int ret; > + struct drm_i915_private *i915 = slpc_to_i915(slpc); > + intel_wakeref_t wakeref; nit: move "ret" as last > + > + with_intel_runtime_pm(&i915->runtime_pm, wakeref) { > + ret = slpc_set_param(slpc, > + SLPC_PARAM_GLOBAL_MAX_GT_UNSLICE_FREQ_MHZ, > + val); > + if (ret) { > + drm_err(&i915->drm, > + "Set max frequency unslice returned (%pe)\n", ERR_PTR(ret)); > + /* Return standardized err code for sysfs */ > + ret = -EIO; maybe caller (hook in sysfs) can sanitize this error ? Michal > + } > + } > + > + return ret; > +} > + > +/** > + * intel_guc_slpc_set_min_freq() - Set min frequency limit for SLPC. > + * @slpc: pointer to intel_guc_slpc. > + * @val: frequency (MHz) > + * > + * This function will invoke GuC SLPC action to update the min unslice > + * frequency. > + * > + * Return: 0 on success, non-zero error code on failure. > + */ > +int intel_guc_slpc_set_min_freq(struct intel_guc_slpc *slpc, u32 val) > +{ > + int ret; > + struct intel_guc *guc = slpc_to_guc(slpc); > + struct drm_i915_private *i915 = guc_to_gt(guc)->i915; > + intel_wakeref_t wakeref; > + > + with_intel_runtime_pm(&i915->runtime_pm, wakeref) { > + ret = slpc_set_param(slpc, > + SLPC_PARAM_GLOBAL_MIN_GT_UNSLICE_FREQ_MHZ, > + val); > + if (ret) { > + drm_err(&i915->drm, > + "Set min frequency for unslice returned (%pe)\n", ERR_PTR(ret)); > + /* Return standardized err code for sysfs */ > + ret = -EIO; > + } > + } > + > + return ret; > +} > + > /* > * intel_guc_slpc_enable() - Start SLPC > * @slpc: pointer to intel_guc_slpc. > diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.h b/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.h > index f02249ff5f1b..3a1a7eaafc12 100644 > --- a/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.h > +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.h > @@ -30,5 +30,7 @@ void intel_guc_slpc_init_early(struct intel_guc_slpc *slpc); > int intel_guc_slpc_init(struct intel_guc_slpc *slpc); > int intel_guc_slpc_enable(struct intel_guc_slpc *slpc); > void intel_guc_slpc_fini(struct intel_guc_slpc *slpc); > +int intel_guc_slpc_set_max_freq(struct intel_guc_slpc *slpc, u32 val); > +int intel_guc_slpc_set_min_freq(struct intel_guc_slpc *slpc, u32 val); > > #endif > _______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/intel-gfx