From patchwork Tue Nov 21 11:24:54 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ekansh Gupta X-Patchwork-Id: 745773 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=quicinc.com header.i=@quicinc.com header.b="G3vUffuV" Received: from mx0b-0031df01.pphosted.com (mx0b-0031df01.pphosted.com [205.220.180.131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E0603198; Tue, 21 Nov 2023 03:25:17 -0800 (PST) Received: from pps.filterd (m0279872.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 3ALAInRS020652; Tue, 21 Nov 2023 11:25:16 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-type; s=qcppdkim1; bh=4uSpDpqIdJDEdclvtSRtkXQ/2JlMe2Zhe3mSiN9o5Wo=; b=G3vUffuVnJ6M6Q2+UQDF+21D0oGmxbY82Z1ZGM3gluGu77FV+hTN+W59PNj0nIN6XBCb ds+yObpPXNbFwqhwEO1hw/deyqjvtez2d+PtLi1K8TCZcwFxBqoxq//oUhYsXDLzlUJ+ wDAqo9GRqgDu+cUiwcpYiUb/lU4xqgOxzwLyc5S0NjlFPgbSYCEYr5bFWMy73OscqWkw g9k+XFIoCIW3LxpD2TiYRGN+ZeUJSJFgM1vR7IcHFarGG9nfS+OTY/1pqJjQoqLfUBw2 oNWZ+aMrt4zinD6DE4N+x4Ub7xmSRON7wV4riLRUIQW2Wi1tPMRq13aVb/D2iN1XiMtM pg== Received: from nalasppmta05.qualcomm.com (Global_NAT1.qualcomm.com [129.46.96.20]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3ugk6x17qy-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 21 Nov 2023 11:25:16 +0000 Received: from nalasex01b.na.qualcomm.com (nalasex01b.na.qualcomm.com [10.47.209.197]) by NALASPPMTA05.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTPS id 3ALBPFRo015851 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 21 Nov 2023 11:25:15 GMT Received: from hu-ekangupt-hyd.qualcomm.com (10.80.80.8) by nalasex01b.na.qualcomm.com (10.47.209.197) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.40; Tue, 21 Nov 2023 03:25:13 -0800 From: Ekansh Gupta To: , CC: , Subject: [PATCH v3 5/5] misc: fastrpc: Add wakelock management support Date: Tue, 21 Nov 2023 16:54:54 +0530 Message-ID: <20231121112454.12764-6-quic_ekangupt@quicinc.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20231121112454.12764-1-quic_ekangupt@quicinc.com> References: <20231121112454.12764-1-quic_ekangupt@quicinc.com> Precedence: bulk X-Mailing-List: linux-arm-msm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Originating-IP: [10.80.80.8] X-ClientProxiedBy: nasanex01b.na.qualcomm.com (10.46.141.250) To nalasex01b.na.qualcomm.com (10.47.209.197) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-GUID: NnGGvhB7nGk8Z8DfTg1MFo-NxGEh-PFM X-Proofpoint-ORIG-GUID: NnGGvhB7nGk8Z8DfTg1MFo-NxGEh-PFM X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.987,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2023-11-21_04,2023-11-21_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 mlxscore=0 impostorscore=0 spamscore=0 clxscore=1015 adultscore=0 malwarescore=0 bulkscore=0 phishscore=0 priorityscore=1501 mlxlogscore=999 lowpriorityscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2311060000 definitions=main-2311210088 CPU can go into suspend mode at anytime. Users might have a requirement to keep the CPU awake until they get a response for their remote call to DSP. Wakelock management can be used to achieve this requirement. Co-developed-by: Anandu Krishnan E Signed-off-by: Anandu Krishnan E Signed-off-by: Ekansh Gupta --- drivers/misc/fastrpc.c | 104 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 104 insertions(+) diff --git a/drivers/misc/fastrpc.c b/drivers/misc/fastrpc.c index 97895fce1228..dcda287cd899 100644 --- a/drivers/misc/fastrpc.c +++ b/drivers/misc/fastrpc.c @@ -120,6 +120,11 @@ /* CPU feature information to DSP */ #define FASTRPC_CPUINFO_DEFAULT (0) #define FASTRPC_CPUINFO_EARLY_WAKEUP (1) + +/* Maximum PM timeout that can be voted through fastrpc */ +#define FASTRPC_MAX_PM_TIMEOUT_MS 50 +#define FASTRPC_NON_SECURE_WAKE_SOURCE_CLIENT_NAME "fastrpc-non_secure" +#define FASTRPC_SECURE_WAKE_SOURCE_CLIENT_NAME "fastrpc-secure" /* Process status notifications from DSP will be sent with this unique context */ #define FASTRPC_NOTIF_CTX_RESERVED 0xABCDABCD @@ -387,6 +392,10 @@ struct fastrpc_channel_ctx { struct fastrpc_device *fdevice; struct fastrpc_buf *remote_heap; struct list_head invoke_interrupted_mmaps; + /* Secure subsystems like ADSP/SLPI will use secure client */ + struct wakeup_source *wake_source_secure; + /* Non-secure subsystem like CDSP will use regular client */ + struct wakeup_source *wake_source; bool secure; bool unsigned_support; bool cpuinfo_status; @@ -417,6 +426,8 @@ struct fastrpc_user { u32 profile; /* Threads poll for specified timeout and fall back to glink wait */ u32 poll_timeout; + u32 ws_timeout; + u32 wake_enable; int tgid; int pd; bool is_secure_dev; @@ -438,11 +449,21 @@ struct fastrpc_ctrl_smmu { u32 sharedcb; /* Set to SMMU share context bank */ }; +struct fastrpc_ctrl_wakelock { + u32 enable; /* wakelock control enable */ +}; + +struct fastrpc_ctrl_pm { + u32 timeout; /* timeout(in ms) for PM to keep system awake */ +}; + struct fastrpc_internal_control { u32 req; union { struct fastrpc_ctrl_latency lp; struct fastrpc_ctrl_smmu smmu; + struct fastrpc_ctrl_wakelock wp; + struct fastrpc_ctrl_pm pm; }; }; @@ -980,6 +1001,43 @@ static void fastrpc_session_free(struct fastrpc_channel_ctx *cctx, spin_unlock_irqrestore(&cctx->lock, flags); } +static void fastrpc_pm_awake(struct fastrpc_user *fl, + u32 is_secure_channel) +{ + struct fastrpc_channel_ctx *cctx = fl->cctx; + struct wakeup_source *wake_source = NULL; + + /* + * Vote with PM to abort any suspend in progress and + * keep system awake for specified timeout + */ + if (is_secure_channel) + wake_source = cctx->wake_source_secure; + else + wake_source = cctx->wake_source; + + if (wake_source) + pm_wakeup_ws_event(wake_source, fl->ws_timeout, true); +} + +static void fastrpc_pm_relax(struct fastrpc_user *fl, + u32 is_secure_channel) +{ + struct fastrpc_channel_ctx *cctx = fl->cctx; + struct wakeup_source *wake_source = NULL; + + if (!fl->wake_enable) + return; + + if (is_secure_channel) + wake_source = cctx->wake_source_secure; + else + wake_source = cctx->wake_source; + + if (wake_source) + __pm_relax(wake_source); +} + static int fastrpc_map_create(struct fastrpc_user *fl, int fd, u64 len, u32 attr, struct fastrpc_map **ppmap) { @@ -1971,6 +2029,7 @@ static int fastrpc_device_release(struct inode *inode, struct file *file) fastrpc_buf_free(buf); } + fastrpc_pm_relax(fl, cctx->secure); fastrpc_session_free(cctx, fl->sctx); fastrpc_channel_ctx_put(cctx); @@ -2251,6 +2310,24 @@ static int fastrpc_internal_control(struct fastrpc_user *fl, case FASTRPC_CONTROL_SMMU: fl->sharedcb = cp->smmu.sharedcb; break; + case FASTRPC_CONTROL_WAKELOCK: + if (!fl->is_secure_dev) { + dev_err(&fl->cctx->rpdev->dev, + "PM voting not allowed for non-secure device node"); + err = -EPERM; + return err; + } + fl->wake_enable = cp->wp.enable; + break; + case FASTRPC_CONTROL_PM: + if (!fl->wake_enable) + return -EACCES; + if (cp->pm.timeout > FASTRPC_MAX_PM_TIMEOUT_MS) + fl->ws_timeout = FASTRPC_MAX_PM_TIMEOUT_MS; + else + fl->ws_timeout = cp->pm.timeout; + fastrpc_pm_awake(fl, fl->cctx->secure); + break; case FASTRPC_CONTROL_RPC_POLL: err = fastrpc_manage_poll_mode(fl, cp->lp.enable, cp->lp.latency); break; @@ -2942,6 +3019,21 @@ static int fastrpc_device_register(struct device *dev, struct fastrpc_channel_ct return err; } +static void fastrpc_register_wakeup_source(struct device *dev, + const char *client_name, struct wakeup_source **device_wake_source) +{ + struct wakeup_source *wake_source = NULL; + + wake_source = wakeup_source_register(dev, client_name); + if (IS_ERR_OR_NULL(wake_source)) { + dev_err(dev, "wakeup_source_register failed for dev %s, client %s with err %ld\n", + dev_name(dev), client_name, PTR_ERR(wake_source)); + return; + } + + *device_wake_source = wake_source; +} + static int fastrpc_rpmsg_probe(struct rpmsg_device *rpdev) { struct device *rdev = &rpdev->dev; @@ -3023,6 +3115,13 @@ static int fastrpc_rpmsg_probe(struct rpmsg_device *rpdev) goto fdev_error; } + if (data->fdevice) + fastrpc_register_wakeup_source(data->fdevice->miscdev.this_device, + FASTRPC_NON_SECURE_WAKE_SOURCE_CLIENT_NAME, &data->wake_source); + if (data->secure_fdevice) + fastrpc_register_wakeup_source(data->secure_fdevice->miscdev.this_device, + FASTRPC_SECURE_WAKE_SOURCE_CLIENT_NAME, &data->wake_source_secure); + kref_init(&data->refcount); dev_set_drvdata(&rpdev->dev, data); @@ -3098,6 +3197,11 @@ static void fastrpc_rpmsg_remove(struct rpmsg_device *rpdev) if (cctx->remote_heap) fastrpc_buf_free(cctx->remote_heap); + if (cctx->wake_source) + wakeup_source_unregister(cctx->wake_source); + if (cctx->wake_source_secure) + wakeup_source_unregister(cctx->wake_source_secure); + of_platform_depopulate(&rpdev->dev); fastrpc_channel_ctx_put(cctx);