From patchwork Wed Oct 23 10:21:45 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sibi Sankar X-Patchwork-Id: 837997 Received: from mx0a-0031df01.pphosted.com (mx0a-0031df01.pphosted.com [205.220.168.131]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id DBA7A1A3A8D; Wed, 23 Oct 2024 10:22:26 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=205.220.168.131 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729678949; cv=none; b=LMrF7RtjOybE3GDsG5K2oDYjQ9i6YrgL+eIZdcJ+B5mXsbZ8pCEo/b6fNKU1PIt46iNboVkvFU0YGnh0jd4AKjVrg+RpptFE1fII5GYru34GhrOOVkLaK1SeziDyyn+ho01iRq6aB/IWcemJqMvXnE9mmzhfOMDUb91ZdET1s8A= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729678949; c=relaxed/simple; bh=K4okTet7BfMYB5dnrDIje7nOU5xQssuITyTWyLj+xsY=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=cpYdt8mv1Y3vQswr/bGD/K6sBAoBiH2HQhceVCrJzpJ1miO5+xx9WWfoI2eu76EfT+ZUA7mdHWe2nG2y6ErDtqprIuF2H/LKtqnfVxP9eyspOCac4F1LSOzmglP5G4RASddiT545ttStbIsbsxsuIIsePeLdjfrtDlg7libFWUU= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=quicinc.com; spf=pass smtp.mailfrom=quicinc.com; dkim=pass (2048-bit key) header.d=quicinc.com header.i=@quicinc.com header.b=XrwpfzE2; arc=none smtp.client-ip=205.220.168.131 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=quicinc.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=quicinc.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=quicinc.com header.i=@quicinc.com header.b="XrwpfzE2" Received: from pps.filterd (m0279864.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 49N9M6bE025421; Wed, 23 Oct 2024 10:22:12 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; h= cc:content-transfer-encoding:content-type:date:from:in-reply-to :message-id:mime-version:references:subject:to; s=qcppdkim1; bh= rZ8yOjy5Fjyj5INh4hG8cqr2Ci2d83sLKwBHm9onm9Y=; b=XrwpfzE26YzvQbmj MbbpuDQZNCivpthfmy9XG2iwp5SukM2thY36HI1v7ul8oFGTjiimXfC6rKW8MEyR dGkci+PLfqs051zrs4sOq55fGo2V8lJXA7SHZMmQlWdH5sjz2/a1WxvzeGdAfpV1 p/8N5YKlB1ObBGSs4Jpve1PM2TJ4xHQcLj2CSiWn5E2uqDxKD4krXg0+Y/+syluo tk4ubrONvKE2FjBKKXySCcJZhMGZeI1mUldHxGY7F3QOZQJaY6muYOrsWhac3Rbz jIdmRxkE+80rCsBKyeBnCu0pM9PkZU66VLktCnOd6ZDLrQ+SMMvqHXKjxhpwoaUf af2OiA== Received: from nalasppmta04.qualcomm.com (Global_NAT1.qualcomm.com [129.46.96.20]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 42em409u0t-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 23 Oct 2024 10:22:11 +0000 (GMT) Received: from nalasex01a.na.qualcomm.com (nalasex01a.na.qualcomm.com [10.47.209.196]) by NALASPPMTA04.qualcomm.com (8.18.1.2/8.18.1.2) with ESMTPS id 49NAMBsB010061 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 23 Oct 2024 10:22:11 GMT Received: from hu-sibis-blr.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 15.2.1544.9; Wed, 23 Oct 2024 03:22:06 -0700 From: Sibi Sankar To: , , , , CC: , , , , , , , , , , "Johan Hovold" Subject: [PATCH V4 1/4] firmware: arm_scmi: Ensure that the message-id supports fastchannel Date: Wed, 23 Oct 2024 15:51:45 +0530 Message-ID: <20241023102148.1698910-2-quic_sibis@quicinc.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20241023102148.1698910-1-quic_sibis@quicinc.com> References: <20241023102148.1698910-1-quic_sibis@quicinc.com> Precedence: bulk X-Mailing-List: linux-pm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 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-ORIG-GUID: umOjxMZjTYOFCPoqUh3ONsbUSG4jS-u_ X-Proofpoint-GUID: umOjxMZjTYOFCPoqUh3ONsbUSG4jS-u_ X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1039,Hydra:6.0.680,FMLib:17.12.60.29 definitions=2024-09-06_09,2024-09-06_01,2024-09-02_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 mlxscore=0 impostorscore=0 spamscore=0 phishscore=0 mlxlogscore=999 lowpriorityscore=0 clxscore=1015 malwarescore=0 bulkscore=0 suspectscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2409260000 definitions=main-2410230063 Currently the perf and powercap protocol relies on the protocol domain attributes, which just ensures that one fastchannel per domain, before instantiating fastchannels for all possible message-ids. Fix this by ensuring that each message-id supports fastchannel before initialization. Reported-by: Johan Hovold Closes: https://lore.kernel.org/lkml/ZoQjAWse2YxwyRJv@hovoldconsulting.com/ Fixes: 6f9ea4dabd2d ("firmware: arm_scmi: Generalize the fast channel support") Signed-off-by: Sibi Sankar Reviewed-by: Sudeep Holla Tested-by: Johan Hovold --- v3: * Pick up R-b, T-b from the list. * Move scmi_protocol_msg_check to the top [Sudeep] drivers/firmware/arm_scmi/driver.c | 72 +++++++++++++++------------ drivers/firmware/arm_scmi/protocols.h | 2 + 2 files changed, 41 insertions(+), 33 deletions(-) diff --git a/drivers/firmware/arm_scmi/driver.c b/drivers/firmware/arm_scmi/driver.c index 5bd4cc68a3e3..36195f177ade 100644 --- a/drivers/firmware/arm_scmi/driver.c +++ b/drivers/firmware/arm_scmi/driver.c @@ -1705,6 +1705,39 @@ static int scmi_common_get_max_msg_size(const struct scmi_protocol_handle *ph) return info->desc->max_msg_size; } +/** + * scmi_protocol_msg_check - Check protocol message attributes + * + * @ph: A reference to the protocol handle. + * @message_id: The ID of the message to check. + * @attributes: A parameter to optionally return the retrieved message + * attributes, in case of Success. + * + * An helper to check protocol message attributes for a specific protocol + * and message pair. + * + * Return: 0 on SUCCESS + */ +static int scmi_protocol_msg_check(const struct scmi_protocol_handle *ph, + u32 message_id, u32 *attributes) +{ + int ret; + struct scmi_xfer *t; + + ret = xfer_get_init(ph, PROTOCOL_MESSAGE_ATTRIBUTES, + sizeof(__le32), 0, &t); + if (ret) + return ret; + + put_unaligned_le32(message_id, t->tx.buf); + ret = do_xfer(ph, t); + if (!ret && attributes) + *attributes = get_unaligned_le32(t->rx.buf); + xfer_put(ph, t); + + return ret; +} + /** * struct scmi_iterator - Iterator descriptor * @msg: A reference to the message TX buffer; filled by @prepare_message with @@ -1846,6 +1879,7 @@ scmi_common_fastchannel_init(const struct scmi_protocol_handle *ph, int ret; u32 flags; u64 phys_addr; + u32 attributes; u8 size; void __iomem *addr; struct scmi_xfer *t; @@ -1854,6 +1888,11 @@ scmi_common_fastchannel_init(const struct scmi_protocol_handle *ph, struct scmi_msg_resp_desc_fc *resp; const struct scmi_protocol_instance *pi = ph_to_pi(ph); + /* Check if the MSG_ID supports fastchannel */ + ret = scmi_protocol_msg_check(ph, message_id, &attributes); + if (!ret && !MSG_SUPPORTS_FASTCHANNEL(attributes)) + return; + if (!p_addr) { ret = -EINVAL; goto err_out; @@ -1981,39 +2020,6 @@ static void scmi_common_fastchannel_db_ring(struct scmi_fc_db_info *db) #endif } -/** - * scmi_protocol_msg_check - Check protocol message attributes - * - * @ph: A reference to the protocol handle. - * @message_id: The ID of the message to check. - * @attributes: A parameter to optionally return the retrieved message - * attributes, in case of Success. - * - * An helper to check protocol message attributes for a specific protocol - * and message pair. - * - * Return: 0 on SUCCESS - */ -static int scmi_protocol_msg_check(const struct scmi_protocol_handle *ph, - u32 message_id, u32 *attributes) -{ - int ret; - struct scmi_xfer *t; - - ret = xfer_get_init(ph, PROTOCOL_MESSAGE_ATTRIBUTES, - sizeof(__le32), 0, &t); - if (ret) - return ret; - - put_unaligned_le32(message_id, t->tx.buf); - ret = do_xfer(ph, t); - if (!ret && attributes) - *attributes = get_unaligned_le32(t->rx.buf); - xfer_put(ph, t); - - return ret; -} - static const struct scmi_proto_helpers_ops helpers_ops = { .extended_name_get = scmi_common_extended_name_get, .get_max_msg_size = scmi_common_get_max_msg_size, diff --git a/drivers/firmware/arm_scmi/protocols.h b/drivers/firmware/arm_scmi/protocols.h index aaee57cdcd55..d62c4469d1fd 100644 --- a/drivers/firmware/arm_scmi/protocols.h +++ b/drivers/firmware/arm_scmi/protocols.h @@ -31,6 +31,8 @@ #define SCMI_PROTOCOL_VENDOR_BASE 0x80 +#define MSG_SUPPORTS_FASTCHANNEL(x) ((x) & BIT(0)) + enum scmi_common_cmd { PROTOCOL_VERSION = 0x0, PROTOCOL_ATTRIBUTES = 0x1,