From patchwork Fri Feb 2 06:40:31 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ekansh Gupta X-Patchwork-Id: 13542151 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 B468618643; Fri, 2 Feb 2024 06:41:09 +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=1706856071; cv=none; b=e7FjeLU8C0hZA69sKlrIw19vjMhn9EHL9NzpJ4Im98Z5ZYBL5zukW3ynAgQMLsZ6YXyZSsf+3ttrz1GcRjJgoXsuq3ezkPGE+Tq29/6w2zni7hiqWPG5S7KQw2YPquzNwx6PHpanFk9nJHxaCCjhhPDjSRAybLei+5i1gg69JKk= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1706856071; c=relaxed/simple; bh=O3ZlBs2M/gymncReU73N8tFP0+d/YXl/Z1mBNb1xC4s=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=gBdE678I5dAK7MtdCPK5T6OWVYtH/E+buB8eh6iK+kkGKZ+zUzowTmKwYvX33m0dG9AbrX5YfVKDSVdsCWQjJGKWqxiGT7yfvTHhYtepBcTeci2rQEdELGglA6+TPuT9jSuh9x13x7235NQ1eRLOA5l1wO66cqQ+Vn6sVED1Ne4= 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=nPYKcRPO; 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="nPYKcRPO" Received: from pps.filterd (m0279873.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.17.1.24/8.17.1.24) with ESMTP id 4123e9Ea013493; Fri, 2 Feb 2024 06:41:08 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=4Wwnw63uGnopclSZhO2/ bG9bPOdkqKSvCNvqNY3G/TY=; b=nPYKcRPODkYCRwCvleI3BMQtGlh3TwARNOzL 3D1d61P/FSGzScuUbu6DZC41/Xs2OoJdCvs6CEJxsfKR5MbKGDCUq96ZKmbIp/OT GtmObR9LVo7VKwXJwoA3cIsmpzCC51ERqJYCaPKY9ycd1S0RMGUSThYj8XqUTURn dqhVfvRwB/qmfpcyL+i76SHdkNkKRoeBif315huCKxQcRzUMsn8ahJtlIi5cgcSP Wz1eiDWn23+N9IHbseoWUxlu2OYibJwN3wmzyP0ZpQWoXrQC3dWc5WEjnxhbtkWT 2HXrsMr9hDUN8F8q7T12N52/TManpjnKtf6keYA0KKBq6Xb6pw== Received: from nalasppmta03.qualcomm.com (Global_NAT1.qualcomm.com [129.46.96.20]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3w0pu4gn9n-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 02 Feb 2024 06:41:07 +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 4126f6KC014282 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 2 Feb 2024 06:41:06 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; Thu, 1 Feb 2024 22:41:05 -0800 From: Ekansh Gupta To: , CC: , Subject: [PATCH v1 08/16] misc: fastrpc: Add support to allocate shared context bank Date: Fri, 2 Feb 2024 12:10:31 +0530 Message-ID: <20240202064039.15505-9-quic_ekangupt@quicinc.com> X-Mailer: git-send-email 2.17.0 In-Reply-To: <20240202064039.15505-1-quic_ekangupt@quicinc.com> References: <20240202064039.15505-1-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: OIbYSNkpy2iFAfFdD-q9ESj2m-J2th9Z X-Proofpoint-ORIG-GUID: OIbYSNkpy2iFAfFdD-q9ESj2m-J2th9Z X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.1011,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2024-02-01_10,2024-01-31_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 impostorscore=0 mlxscore=0 malwarescore=0 phishscore=0 lowpriorityscore=0 mlxlogscore=999 clxscore=1015 bulkscore=0 spamscore=0 adultscore=0 priorityscore=1501 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2401310000 definitions=main-2402020047 Context banks could be set as a shared one using a DT propery "qcom,nsessions". The property takes the number of session to be created of the context bank. This change provides a control mechanism for user to use shared context banks for light weight processes. The session is set as shared while its creation and if a user requests for shared context bank, the same will be allocated during process initialization. Signed-off-by: Ekansh Gupta --- drivers/misc/fastrpc.c | 117 ++++++++++++++++++++++++------------ include/uapi/misc/fastrpc.h | 21 +++++++ 2 files changed, 99 insertions(+), 39 deletions(-) diff --git a/drivers/misc/fastrpc.c b/drivers/misc/fastrpc.c index 88f065e78bc2..9f67cfbc0222 100644 --- a/drivers/misc/fastrpc.c +++ b/drivers/misc/fastrpc.c @@ -312,6 +312,7 @@ struct fastrpc_session_ctx { int sid; bool used; bool valid; + bool sharedcb; }; struct fastrpc_static_pd { @@ -371,6 +372,7 @@ struct fastrpc_user { int pd; bool is_secure_dev; bool is_unsigned_pd; + bool sharedcb; char *servloc_name; /* Lock for lists */ spinlock_t lock; @@ -879,6 +881,37 @@ static const struct dma_buf_ops fastrpc_dma_buf_ops = { .release = fastrpc_release, }; +static struct fastrpc_session_ctx *fastrpc_session_alloc( + struct fastrpc_channel_ctx *cctx, bool sharedcb) +{ + struct fastrpc_session_ctx *session = NULL; + unsigned long flags; + int i; + + spin_lock_irqsave(&cctx->lock, flags); + for (i = 0; i < cctx->sesscount; i++) { + if (!cctx->session[i].used && cctx->session[i].valid && + cctx->session[i].sharedcb == sharedcb) { + cctx->session[i].used = true; + session = &cctx->session[i]; + break; + } + } + spin_unlock_irqrestore(&cctx->lock, flags); + + return session; +} + +static void fastrpc_session_free(struct fastrpc_channel_ctx *cctx, + struct fastrpc_session_ctx *session) +{ + unsigned long flags; + + spin_lock_irqsave(&cctx->lock, flags); + session->used = false; + spin_unlock_irqrestore(&cctx->lock, flags); +} + static int fastrpc_map_create(struct fastrpc_user *fl, int fd, u64 len, u32 attr, struct fastrpc_map **ppmap) { @@ -1545,6 +1578,12 @@ static int fastrpc_init_create_static_process(struct fastrpc_user *fl, goto err_name; } + fl->sctx = fastrpc_session_alloc(fl->cctx, fl->sharedcb); + if (!fl->sctx) { + err = -EBUSY; + goto err_name; + } + if (!fl->cctx->staticpd_status) { err = fastrpc_remote_heap_alloc(fl, fl->sctx->dev, init.memlen, &buf); if (err) @@ -1674,6 +1713,12 @@ static int fastrpc_init_create_process(struct fastrpc_user *fl, goto err; } + fl->sctx = fastrpc_session_alloc(fl->cctx, fl->sharedcb); + if (!fl->sctx) { + err = -EBUSY; + goto err; + } + inbuf.pgid = fl->tgid; inbuf.namelen = strlen(current->comm) + 1; inbuf.filelen = init.filelen; @@ -1749,36 +1794,6 @@ static int fastrpc_init_create_process(struct fastrpc_user *fl, return err; } -static struct fastrpc_session_ctx *fastrpc_session_alloc( - struct fastrpc_channel_ctx *cctx) -{ - struct fastrpc_session_ctx *session = NULL; - unsigned long flags; - int i; - - spin_lock_irqsave(&cctx->lock, flags); - for (i = 0; i < cctx->sesscount; i++) { - if (!cctx->session[i].used && cctx->session[i].valid) { - cctx->session[i].used = true; - session = &cctx->session[i]; - break; - } - } - spin_unlock_irqrestore(&cctx->lock, flags); - - return session; -} - -static void fastrpc_session_free(struct fastrpc_channel_ctx *cctx, - struct fastrpc_session_ctx *session) -{ - unsigned long flags; - - spin_lock_irqsave(&cctx->lock, flags); - session->used = false; - spin_unlock_irqrestore(&cctx->lock, flags); -} - static void fastrpc_context_list_free(struct fastrpc_user *fl) { struct fastrpc_invoke_ctx *ctx, *n; @@ -1882,15 +1897,6 @@ static int fastrpc_device_open(struct inode *inode, struct file *filp) fl->cctx = cctx; fl->is_secure_dev = fdevice->secure; - fl->sctx = fastrpc_session_alloc(cctx); - if (!fl->sctx) { - dev_err(&cctx->rpdev->dev, "No session available\n"); - mutex_destroy(&fl->mutex); - kfree(fl); - - return -EBUSY; - } - spin_lock_irqsave(&cctx->lock, flags); list_add_tail(&fl->user, &cctx->users); spin_unlock_irqrestore(&cctx->lock, flags); @@ -1949,6 +1955,10 @@ static int fastrpc_init_attach(struct fastrpc_user *fl, int pd) struct fastrpc_enhanced_invoke ioctl; int tgid = fl->tgid; + fl->sctx = fastrpc_session_alloc(fl->cctx, fl->sharedcb); + if (!fl->sctx) + return -EBUSY; + args[0].ptr = (u64)(uintptr_t) &tgid; args[0].length = sizeof(tgid); args[0].fd = -1; @@ -2001,11 +2011,33 @@ static int fastrpc_invoke(struct fastrpc_user *fl, char __user *argp) return err; } +static int fastrpc_internal_control(struct fastrpc_user *fl, + struct fastrpc_internal_control *cp) +{ + int err = 0; + + if (!fl) + return -EBADF; + if (!cp) + return -EINVAL; + + switch (cp->req) { + case FASTRPC_CONTROL_SMMU: + fl->sharedcb = cp->smmu.sharedcb; + break; + default: + err = -EBADRQC; + break; + } + return err; +} + static int fastrpc_multimode_invoke(struct fastrpc_user *fl, char __user *argp) { struct fastrpc_enhanced_invoke einv; struct fastrpc_invoke_args *args = NULL; struct fastrpc_ioctl_multimode_invoke invoke; + struct fastrpc_internal_control cp = {0}; u32 nscalars; u64 *perf_kernel; int err, i; @@ -2049,6 +2081,12 @@ static int fastrpc_multimode_invoke(struct fastrpc_user *fl, char __user *argp) err = fastrpc_internal_invoke(fl, false, &einv); kfree(args); break; + case FASTRPC_INVOKE_CONTROL: + if (copy_from_user(&cp, (void __user *)(uintptr_t)invoke.invparam, sizeof(cp))) + return -EFAULT; + + err = fastrpc_internal_control(fl, &cp); + break; default: err = -ENOTTY; break; @@ -2738,6 +2776,7 @@ static int fastrpc_cb_probe(struct platform_device *pdev) if (sessions > 0) { struct fastrpc_session_ctx *dup_sess; + sess->sharedcb = true; for (i = 1; i < sessions; i++) { if (cctx->sesscount >= FASTRPC_MAX_SESSIONS) break; diff --git a/include/uapi/misc/fastrpc.h b/include/uapi/misc/fastrpc.h index 559a3aea85b9..d29188e43b21 100644 --- a/include/uapi/misc/fastrpc.h +++ b/include/uapi/misc/fastrpc.h @@ -166,6 +166,27 @@ struct fastrpc_ioctl_capability { __u32 reserved[4]; }; +enum fastrpc_control_type { + FASTRPC_CONTROL_LATENCY = 1, + FASTRPC_CONTROL_SMMU = 2, + FASTRPC_CONTROL_KALLOC = 3, + FASTRPC_CONTROL_WAKELOCK = 4, + FASTRPC_CONTROL_PM = 5, + FASTRPC_CONTROL_DSPPROCESS_CLEAN = 6, + FASTRPC_CONTROL_RPC_POLL = 7, + FASTRPC_CONTROL_ASYNC_WAKE = 8, + FASTRPC_CONTROL_NOTIF_WAKE = 9, +}; + +struct fastrpc_ctrl_smmu { + u32 sharedcb; /* Set to SMMU share context bank */ +}; + +struct fastrpc_internal_control { + u32 req; + struct fastrpc_ctrl_smmu smmu; +}; + enum fastrpc_perfkeys { PERF_COUNT = 0, PERF_FLUSH = 1,