From patchwork Wed May 8 05:42:48 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ekansh Gupta X-Patchwork-Id: 795776 Received: from mx0b-0031df01.pphosted.com (mx0b-0031df01.pphosted.com [205.220.180.131]) (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 1DF871BC40; Wed, 8 May 2024 05:43:16 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=205.220.180.131 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1715146998; cv=none; b=bSYC6xyN5a2lNI4ypeEKMlac86kFgjf1nsPOya4ABObUU+BPxKoMdTsj30nbWL2qphsOEe+blDBx1or4LraTAJIOIcs+PQ1njeoCoaSiFuWsUBQdtJV4mCd/7MBa2+Y1AsHcflBQiZqZcAy/6QKBmv7fA/TL7dqJ82/Ow/3Ayy8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1715146998; c=relaxed/simple; bh=QgxgtjKWOhnf8BEi8TmVYAlkK6nLv/B7YoNZV2UiaeY=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=fyn8TY0gEcVHE9GH7cjzTUbcuP7K0eyNDymYj5xS5jNNYx7RJll0Kxr8/K7EdktOpPTc4E+iUqWXSzUZFXO6yRsBkgUvgIcEGHrBMqCbzKR7tTvagRX1wbMfHrManlwgeQVVRQFy8Q9Y6ugTPAnkzukkRQn+hEtIDoZuB6P6k4s= 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=MPS/dzTE; arc=none smtp.client-ip=205.220.180.131 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="MPS/dzTE" Received: from pps.filterd (m0279871.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 4485AC6p028149; Wed, 8 May 2024 05:43:12 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-transfer-encoding:content-type; s= qcppdkim1; bh=/WA3/16UPP+x2no7zUwH2N8inVoHeDDKUqoXV9jwK4Y=; b=MP S/dzTEvKTcYIeiTMksLyYFVII/Yu0/eTgMB+P7KUdZYovTAo93TVwcOF+lrJmTN4 WmkODM/V8j8wkGKwvQ1BXxhwBbxZ3XwG1WVdIsUWQEwsvaRT6Yw4athtQFjgrWmx LjEReVDqWlInbKImKTLPg6TYKzQXk3bnusreS4Kio3IhN1xLWM3CziCIynw80+h9 2zxwVirTAAS7UwAKZYv7/2+1v/X3Z5ZqV+0+HvEQ4NmHX2I7SMiFJM0XsYtADlZj QzC9+R/kC5vcoZtLIvKOs4Q4Hc5MIA6NPOvCpg30Y70Xw3cWUQJnI4TI2sr/ZVSI jPouwhHkdeFSJnOoCecQ== Received: from nalasppmta03.qualcomm.com (Global_NAT1.qualcomm.com [129.46.96.20]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3xyspms0ar-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 08 May 2024 05:43:12 +0000 (GMT) Received: from nalasex01b.na.qualcomm.com (nalasex01b.na.qualcomm.com [10.47.209.197]) by NALASPPMTA03.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTPS id 4485hABr012955 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 8 May 2024 05:43:10 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 15.2.1544.9; Tue, 7 May 2024 22:43:08 -0700 From: Ekansh Gupta To: , CC: , Subject: [PATCH v1 5/5] misc: fastrpc: Add static PD restart support Date: Wed, 8 May 2024 11:12:48 +0530 Message-ID: <20240508054250.2922-6-quic_ekangupt@quicinc.com> X-Mailer: git-send-email 2.43.2 In-Reply-To: <20240508054250.2922-1-quic_ekangupt@quicinc.com> References: <20240508054250.2922-1-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-ClientProxiedBy: nasanex01a.na.qualcomm.com (10.52.223.231) 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: BgFoslwymLXvPdmzOnz8L1TYzDUuvemM X-Proofpoint-ORIG-GUID: BgFoslwymLXvPdmzOnz8L1TYzDUuvemM X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1039,Hydra:6.0.650,FMLib:17.11.176.26 definitions=2024-05-08_02,2024-05-06_02,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 bulkscore=0 phishscore=0 suspectscore=0 mlxscore=0 impostorscore=0 spamscore=0 adultscore=0 clxscore=1015 malwarescore=0 lowpriorityscore=0 mlxlogscore=999 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2405010000 definitions=main-2405080040 Static PDs on the audio and sensor domains are expected to support PD restart. The kernel resource handling for the PDs are expected to be handled by fastrpc driver. For this, there is a requirement of PD service locator to get the event notifications for static PD services. Also when events are received, the driver needs to handle based on PD states. Added changes to add service locator for audio and sensor domain static PDs and handle the PD restart sequence. Signed-off-by: Ekansh Gupta --- drivers/misc/Kconfig | 1 + drivers/misc/fastrpc.c | 226 ++++++++++++++++++++++++++++++++++++++--- 2 files changed, 215 insertions(+), 12 deletions(-) diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig index 4fb291f0bf7c..0d854da9e85a 100644 --- a/drivers/misc/Kconfig +++ b/drivers/misc/Kconfig @@ -282,6 +282,7 @@ config QCOM_FASTRPC depends on RPMSG select DMA_SHARED_BUFFER select QCOM_SCM + select QCOM_PDR_HELPERS help Provides a communication mechanism that allows for clients to make remote method invocations across processor boundary to diff --git a/drivers/misc/fastrpc.c b/drivers/misc/fastrpc.c index 4d4dace17ad3..c37edcc881a5 100644 --- a/drivers/misc/fastrpc.c +++ b/drivers/misc/fastrpc.c @@ -22,6 +22,7 @@ #include #include #include +#include #define ADSP_DOMAIN_ID (0) #define MDSP_DOMAIN_ID (1) @@ -29,6 +30,7 @@ #define CDSP_DOMAIN_ID (3) #define FASTRPC_DEV_MAX 4 /* adsp, mdsp, slpi, cdsp*/ #define FASTRPC_MAX_SESSIONS 14 +#define FASTRPC_MAX_SPD 4 #define FASTRPC_MAX_VMIDS 16 #define FASTRPC_ALIGN 128 #define FASTRPC_MAX_FDLIST 16 @@ -105,6 +107,18 @@ #define miscdev_to_fdevice(d) container_of(d, struct fastrpc_device, miscdev) +#define AUDIO_PDR_SERVICE_LOCATION_CLIENT_NAME "audio_pdr_adsp" +#define AUDIO_PDR_ADSP_SERVICE_NAME "avs/audio" +#define ADSP_AUDIOPD_NAME "msm/adsp/audio_pd" + +#define SENSORS_PDR_ADSP_SERVICE_LOCATION_CLIENT_NAME "sensors_pdr_adsp" +#define SENSORS_PDR_ADSP_SERVICE_NAME "tms/servreg" +#define ADSP_SENSORPD_NAME "msm/adsp/sensor_pd" + +#define SENSORS_PDR_SLPI_SERVICE_LOCATION_CLIENT_NAME "sensors_pdr_slpi" +#define SENSORS_PDR_SLPI_SERVICE_NAME SENSORS_PDR_ADSP_SERVICE_NAME +#define SLPI_SENSORPD_NAME "msm/slpi/sensor_pd" + static const char *domains[FASTRPC_DEV_MAX] = { "adsp", "mdsp", "sdsp", "cdsp"}; struct fastrpc_phy_page { @@ -260,6 +274,16 @@ struct fastrpc_session_ctx { bool valid; }; +struct fastrpc_static_pd { + char *servloc_name; + char *spdname; + void *pdrhandle; + u64 pdrcount; + u64 prevpdrcount; + atomic_t ispdup; + struct fastrpc_channel_ctx *cctx; +}; + struct fastrpc_channel_ctx { int domain_id; int sesscount; @@ -267,6 +291,7 @@ struct fastrpc_channel_ctx { struct qcom_scm_vmperm vmperms[FASTRPC_MAX_VMIDS]; struct rpmsg_device *rpdev; struct fastrpc_session_ctx session[FASTRPC_MAX_SESSIONS]; + struct fastrpc_static_pd spd[FASTRPC_MAX_SPD]; spinlock_t lock; struct idr ctx_idr; struct list_head users; @@ -304,6 +329,7 @@ struct fastrpc_user { bool is_secure_dev; bool is_unsigned_pd; bool untrusted_process; + char *servloc_name; /* Lock for lists */ spinlock_t lock; /* lock for allocations */ @@ -1260,6 +1286,50 @@ static int fastrpc_mmap_remove_ssr(struct fastrpc_channel_ctx *cctx) return 0; } +static int fastrpc_get_spd_session(struct fastrpc_channel_ctx *cctx, + char *servloc_name) +{ + int i, session = -1; + + for (i = 0; i < FASTRPC_MAX_SPD ; i++) { + if (!cctx->spd[i].servloc_name) + continue; + if (!strcmp(servloc_name, cctx->spd[i].servloc_name)) { + session = i; + break; + } + } + + return session; +} + +static int fastrpc_mmap_remove_pdr(struct fastrpc_user *fl) +{ + int err = 0, session = -1; + + if (!fl) + return -EBADF; + + session = fastrpc_get_spd_session(fl->cctx, fl->servloc_name); + if (session < 0) + return -EUSERS; + + if (atomic_read(&fl->cctx->spd[session].ispdup) == 0) + return -ENOTCONN; + + if (fl->cctx->spd[session].pdrcount != + fl->cctx->spd[session].prevpdrcount) { + err = fastrpc_mmap_remove_ssr(fl->cctx); + if (err) + dev_info(&fl->cctx->rpdev->dev, + "failed to unmap remote heap (err %d)\n", err); + fl->cctx->spd[session].prevpdrcount = + fl->cctx->spd[session].pdrcount; + } + + return err; +} + static int fastrpc_init_create_static_process(struct fastrpc_user *fl, char __user *argp) { @@ -1309,6 +1379,18 @@ static int fastrpc_init_create_static_process(struct fastrpc_user *fl, goto err_name; } + fl->servloc_name = AUDIO_PDR_SERVICE_LOCATION_CLIENT_NAME; + + if (!strcmp(name, "audiopd")) { + /* + * Remove any previous mappings in case process is trying + * to reconnect after a PD restart on remote subsystem. + */ + err = fastrpc_mmap_remove_pdr(fl); + if (err) + goto err_name; + } + if (!fl->cctx->staticpd_status) { err = fastrpc_remote_heap_alloc(fl, fl->sctx->dev, init.memlen, &buf); if (err) @@ -1724,6 +1806,13 @@ static int fastrpc_init_attach(struct fastrpc_user *fl, int pd) sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_ATTACH, 1, 0); fl->pd = pd; + if (pd == SENSORS_PD) { + if (fl->cctx->domain_id == ADSP_DOMAIN_ID) + fl->servloc_name = SENSORS_PDR_ADSP_SERVICE_LOCATION_CLIENT_NAME; + else if (fl->cctx->domain_id == SDSP_DOMAIN_ID) + fl->servloc_name = SENSORS_PDR_SLPI_SERVICE_LOCATION_CLIENT_NAME; + } + return fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, sc, &args[0]); } @@ -2322,6 +2411,72 @@ static long fastrpc_device_ioctl(struct file *file, unsigned int cmd, return err; } +static void fastrpc_notify_users(struct fastrpc_user *user) +{ + struct fastrpc_invoke_ctx *ctx; + + spin_lock(&user->lock); + list_for_each_entry(ctx, &user->pending, node) { + ctx->retval = -EPIPE; + complete(&ctx->work); + } + spin_unlock(&user->lock); +} + +static void fastrpc_notify_pdr_drivers(struct fastrpc_channel_ctx *cctx, + char *servloc_name) +{ + struct fastrpc_user *fl; + unsigned long flags; + + spin_lock_irqsave(&cctx->lock, flags); + list_for_each_entry(fl, &cctx->users, user) { + if (fl->servloc_name && !strcmp(servloc_name, fl->servloc_name)) + fastrpc_notify_users(fl); + } + spin_unlock_irqrestore(&cctx->lock, flags); +} + +static void fastrpc_pdr_cb(int state, char *service_path, void *priv) +{ + struct fastrpc_static_pd *spd = (struct fastrpc_static_pd *)priv; + struct fastrpc_channel_ctx *cctx; + unsigned long flags; + + if (!spd) + return; + + cctx = spd->cctx; + switch (state) { + case SERVREG_SERVICE_STATE_DOWN: + dev_info(&cctx->rpdev->dev, + "%s: %s (%s) is down for PDR on %s\n", + __func__, spd->spdname, + spd->servloc_name, + domains[cctx->domain_id]); + spin_lock_irqsave(&cctx->lock, flags); + spd->pdrcount++; + atomic_set(&spd->ispdup, 0); + spin_unlock_irqrestore(&cctx->lock, flags); + if (!strcmp(spd->servloc_name, + AUDIO_PDR_SERVICE_LOCATION_CLIENT_NAME)) + cctx->staticpd_status = false; + + fastrpc_notify_pdr_drivers(cctx, spd->servloc_name); + break; + case SERVREG_SERVICE_STATE_UP: + dev_info(&cctx->rpdev->dev, + "%s: %s (%s) is up for PDR on %s\n", + __func__, spd->spdname, + spd->servloc_name, + domains[cctx->domain_id]); + atomic_set(&spd->ispdup, 1); + break; + default: + break; + } +} + static const struct file_operations fastrpc_fops = { .open = fastrpc_device_open, .release = fastrpc_device_release, @@ -2441,6 +2596,39 @@ static int fastrpc_device_register(struct device *dev, struct fastrpc_channel_ct return err; } +static int fastrpc_setup_service_locator(struct fastrpc_channel_ctx *cctx, char *client_name, + char *service_name, char *service_path, int domain, int spd_session) +{ + int err = 0; + struct pdr_handle *handle = NULL; + struct pdr_service *service = NULL; + + /* Register the service locator's callback function */ + handle = pdr_handle_alloc(fastrpc_pdr_cb, &cctx->spd[spd_session]); + if (IS_ERR(handle)) { + err = PTR_ERR(handle); + goto bail; + } + cctx->spd[spd_session].pdrhandle = handle; + cctx->spd[spd_session].servloc_name = client_name; + cctx->spd[spd_session].spdname = service_path; + cctx->spd[spd_session].cctx = cctx; + service = pdr_add_lookup(handle, service_name, service_path); + if (IS_ERR(service)) { + err = PTR_ERR(service); + goto bail; + } + pr_info("fastrpc: %s: pdr_add_lookup enabled for %s (%s, %s)\n", + __func__, service_name, client_name, service_path); + +bail: + if (err) { + pr_warn("fastrpc: %s: failed for %s (%s, %s)with err %d\n", + __func__, service_name, client_name, service_path, err); + } + return err; +} + static int fastrpc_rpmsg_probe(struct rpmsg_device *rpdev) { struct device *rdev = &rpdev->dev; @@ -2519,6 +2707,25 @@ static int fastrpc_rpmsg_probe(struct rpmsg_device *rpdev) goto fdev_error; } + if (domain_id == ADSP_DOMAIN_ID) { + err = fastrpc_setup_service_locator(data, AUDIO_PDR_SERVICE_LOCATION_CLIENT_NAME, + AUDIO_PDR_ADSP_SERVICE_NAME, ADSP_AUDIOPD_NAME, domain_id, 0); + if (err) + goto populate_error; + + err = fastrpc_setup_service_locator(data, + SENSORS_PDR_ADSP_SERVICE_LOCATION_CLIENT_NAME, + SENSORS_PDR_ADSP_SERVICE_NAME, ADSP_SENSORPD_NAME, domain_id, 1); + if (err) + goto populate_error; + } else if (domain_id == SDSP_DOMAIN_ID) { + err = fastrpc_setup_service_locator(data, + SENSORS_PDR_SLPI_SERVICE_LOCATION_CLIENT_NAME, + SENSORS_PDR_SLPI_SERVICE_NAME, SLPI_SENSORPD_NAME, domain_id, 0); + if (err) + goto populate_error; + } + kref_init(&data->refcount); dev_set_drvdata(&rpdev->dev, data); @@ -2548,18 +2755,6 @@ static int fastrpc_rpmsg_probe(struct rpmsg_device *rpdev) return err; } -static void fastrpc_notify_users(struct fastrpc_user *user) -{ - struct fastrpc_invoke_ctx *ctx; - - spin_lock(&user->lock); - list_for_each_entry(ctx, &user->pending, node) { - ctx->retval = -EPIPE; - complete(&ctx->work); - } - spin_unlock(&user->lock); -} - static void fastrpc_rpmsg_remove(struct rpmsg_device *rpdev) { struct fastrpc_channel_ctx *cctx = dev_get_drvdata(&rpdev->dev); @@ -2574,6 +2769,13 @@ static void fastrpc_rpmsg_remove(struct rpmsg_device *rpdev) fastrpc_notify_users(user); spin_unlock_irqrestore(&cctx->lock, flags); + if (cctx->domain_id == ADSP_DOMAIN_ID) { + pdr_handle_release(cctx->spd[0].pdrhandle); + pdr_handle_release(cctx->spd[1].pdrhandle); + } else if (cctx->domain_id == SDSP_DOMAIN_ID) { + pdr_handle_release(cctx->spd[0].pdrhandle); + } + if (cctx->fdevice) misc_deregister(&cctx->fdevice->miscdev);