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Mon, 8 Jan 2024 14:01:45 GMT Received: from blr-ubuntu-253.qualcomm.com (10.80.80.8) by nalasex01a.na.qualcomm.com (10.47.209.196) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.40; Mon, 8 Jan 2024 06:01:42 -0800 From: Sibi Sankar To: , , , CC: , , , , , Sibi Sankar Subject: [PATCH 2/3] firmware: arm_scmi: Add perf_opp_xlate interface Date: Mon, 8 Jan 2024 19:31:17 +0530 Message-ID: <20240108140118.1596-3-quic_sibis@quicinc.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20240108140118.1596-1-quic_sibis@quicinc.com> References: <20240108140118.1596-1-quic_sibis@quicinc.com> MIME-Version: 1.0 X-Originating-IP: [10.80.80.8] X-ClientProxiedBy: nasanex01a.na.qualcomm.com (10.52.223.231) To nalasex01a.na.qualcomm.com (10.47.209.196) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-GUID: R5D3casVtRTZy-PqIhmC_qx1iFnJMUVd X-Proofpoint-ORIG-GUID: R5D3casVtRTZy-PqIhmC_qx1iFnJMUVd X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.997,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2023-12-09_02,2023-12-07_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 malwarescore=0 suspectscore=0 mlxlogscore=999 impostorscore=0 adultscore=0 lowpriorityscore=0 bulkscore=0 spamscore=0 mlxscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2311290000 definitions=main-2401080120 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240108_060225_801245_D5D3A7C1 X-CRM114-Status: GOOD ( 16.99 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Add a new perf_opp_xlate interface to the existing perf_ops to translate a given perf index to frequency. This can be used by the cpufreq driver and framework to determine the throttled frequency from a given perf index and apply HW pressure accordingly. Signed-off-by: Sibi Sankar --- drivers/firmware/arm_scmi/perf.c | 21 +++++++++++++++++++++ include/linux/scmi_protocol.h | 3 +++ 2 files changed, 24 insertions(+) diff --git a/drivers/firmware/arm_scmi/perf.c b/drivers/firmware/arm_scmi/perf.c index c167bb5e3607..f26390924e1c 100644 --- a/drivers/firmware/arm_scmi/perf.c +++ b/drivers/firmware/arm_scmi/perf.c @@ -964,6 +964,26 @@ static int scmi_notify_support(const struct scmi_protocol_handle *ph, u32 domain return 0; } +static int scmi_perf_opp_xlate(const struct scmi_protocol_handle *ph, u32 domain, + int idx, unsigned long *freq) +{ + struct perf_dom_info *dom; + + dom = scmi_perf_domain_lookup(ph, domain); + if (IS_ERR(dom)) + return PTR_ERR(dom); + + if (idx >= dom->opp_count) + return -ERANGE; + + if (!dom->level_indexing_mode) + *freq = dom->opp[idx].perf * dom->mult_factor; + else + *freq = dom->opp[idx].indicative_freq * dom->mult_factor; + + return 0; +} + static const struct scmi_perf_proto_ops perf_proto_ops = { .num_domains_get = scmi_perf_num_domains_get, .info_get = scmi_perf_info_get, @@ -979,6 +999,7 @@ static const struct scmi_perf_proto_ops perf_proto_ops = { .fast_switch_possible = scmi_fast_switch_possible, .power_scale_get = scmi_power_scale_get, .perf_notify_support = scmi_notify_support, + .perf_opp_xlate = scmi_perf_opp_xlate, }; static int scmi_perf_set_notify_enabled(const struct scmi_protocol_handle *ph, diff --git a/include/linux/scmi_protocol.h b/include/linux/scmi_protocol.h index b0947d004826..9c285ae89848 100644 --- a/include/linux/scmi_protocol.h +++ b/include/linux/scmi_protocol.h @@ -145,6 +145,7 @@ struct scmi_perf_notify_info { * @power_scale_mw_get: indicates if the power values provided are in milliWatts * or in some other (abstract) scale * @perf_notify_support: indicates if limit and level change notification is supported + * @perf_opp_xlate: translates the given perf index to frequency in Hz */ struct scmi_perf_proto_ops { int (*num_domains_get)(const struct scmi_protocol_handle *ph); @@ -173,6 +174,8 @@ struct scmi_perf_proto_ops { enum scmi_power_scale (*power_scale_get)(const struct scmi_protocol_handle *ph); int (*perf_notify_support)(const struct scmi_protocol_handle *ph, u32 domain, struct scmi_perf_notify_info *info); + int (*perf_opp_xlate)(const struct scmi_protocol_handle *ph, u32 domain, + int idx, unsigned long *freq); }; /**