From patchwork Mon Jan 14 19:41:09 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Srinivas Kandagatla X-Patchwork-Id: 155577 Delivered-To: patch@linaro.org Received: by 2002:a02:48:0:0:0:0:0 with SMTP id 69csp4040476jaa; Mon, 14 Jan 2019 11:42:20 -0800 (PST) X-Google-Smtp-Source: ALg8bN5m0c7SAKVb/kvXeBzI/5qr+PAJRIDnPHUBwDgh3dbrDJqKPID3jEu/fUlgfOWPMyQq3/LQ X-Received: by 2002:a62:509b:: with SMTP id g27mr138884pfj.48.1547494940560; Mon, 14 Jan 2019 11:42:20 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1547494940; cv=none; d=google.com; s=arc-20160816; b=kDxGlhSgHTATjwKrx4iKS4JkvqIDXS8S+//cuIbOFddg/dkCV8FM7MgbXsAVjtK7Pq 2fRi4iqoR+NNQlZAbFNiLwFQ9psfZOcuC5uw0HSFjN//NrkDaY0P4NcminYz/0gaIkrv /4TzBG6Vwnj/GYjxdnLYTka2tn916IyOdHjZVDUGG+Fq2fLvXUCR4IALZUKMbrxdbcV6 qhTf0wy5wdbndRFOMEAFtIG7+ussQnscxSIrL1445Nud3rPQuy6+8+oFuLHIRMOWKqF8 ZeVRwbeVCHSWSmvxMeYWE5K00cjs9evB9AAMYhm9iSRGVJVDzkC5zzIV3vsGfsXHcvIX EF6A== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:content-transfer-encoding:mime-version :references:in-reply-to:message-id:date:subject:cc:to:from :dkim-signature; bh=S0aWl/+Ew4yEPq0SRrpXsq42WiPfKAaWt6eu386ameI=; b=UrHxaOBfCPmrCHp4U1zjZ9iHTBo50WYO9lcMvskaOkBtlqfjBHJGtxAn6S5OmolFZC YWDRLgjYzmy/i5+NnDUz9YfkBs8J9r5L3jbyPgS2gJd4jSWqkoCyD0TjCyY2Kg/fKjnT RlNmzUCLpfAhwCRvv49/HQKejszthraGeYeX/+RsdSxAEzEmLs0rjpJIXSvaLpHS1+GF qCqlhA6qxQkT00Mnqk1N6RP7zUqh+pKPvdJpMjGWnuQgSLGdInnTAQqQnLGC7RfJBDN5 VFrLotQBTpGc3FWS/728rRw+0LEMXjEdPkVO9L+hYkkFDOXZfbsOuy4JrTUpd7zV47tl cr1A== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@linaro.org header.s=google header.b=HNPT1hEo; spf=pass (google.com: best guess record for domain of devicetree-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=devicetree-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linaro.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id 101si1185877pld.22.2019.01.14.11.42.20; Mon, 14 Jan 2019 11:42:20 -0800 (PST) Received-SPF: pass (google.com: best guess record for domain of devicetree-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=pass header.i=@linaro.org header.s=google header.b=HNPT1hEo; spf=pass (google.com: best guess record for domain of devicetree-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=devicetree-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linaro.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726875AbfANTmS (ORCPT + 7 others); Mon, 14 Jan 2019 14:42:18 -0500 Received: from mail-wr1-f68.google.com ([209.85.221.68]:34383 "EHLO mail-wr1-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726863AbfANTmS (ORCPT ); Mon, 14 Jan 2019 14:42:18 -0500 Received: by mail-wr1-f68.google.com with SMTP id j2so293001wrw.1 for ; Mon, 14 Jan 2019 11:42:16 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=S0aWl/+Ew4yEPq0SRrpXsq42WiPfKAaWt6eu386ameI=; b=HNPT1hEovqq2Td1bPztlfUbGGxDA6QLt65VD3codbHWzxobt8ilpRHuNi5JaYm+8wp l84EcsFSXk9zEY1XRmOzDrq0YfG6T92wIbztF/YgfTZ9wV5/i3QjdBUp+rZ2djs7wd+I Nu8L9Pgit2pRglG9Jwilc+WBeeuuXmyct2QXo= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=S0aWl/+Ew4yEPq0SRrpXsq42WiPfKAaWt6eu386ameI=; b=nEbMmApwAsoIrJpHAjqEZTELRdCMRPgri6LHFzpJorBMiFDmBWT6zoYUf4kudnM5DN SaHm/3YQ911zEgg3ONgoOob/OwtwuZ8J/t0VYYfqspHvxMhSHYGtWo8cuTQlhsrNBU2E tnFSf4AXfFqIAQASjumNCeBGuZYz3xvBjmq6PJgeinR3vMFfpzf9bl07IYsTTLsoyPSN G2HpVMzoSedivIeWphczAFll8VocoXuLOV2X4IEEEYJ76XF4JLoAVZiO/Zwm62zH1V+B PTglpv2207K/XhtEi2yS9tqoz6jWPs0FQbeNoipY8EPzquyI/c1HRUQs1MmAwHoIw9Vl gAsQ== X-Gm-Message-State: AJcUukfGkTMi/ard46eiRAbuIrJsjl7ESVYwkBBjeNspDzdJ03utWkzK onICNlTzeNax80Pvfj1x5v3GhscAIpI= X-Received: by 2002:a05:6000:108d:: with SMTP id y13mr52723wrw.135.1547494935726; Mon, 14 Jan 2019 11:42:15 -0800 (PST) Received: from srini-hackbox.lan (cpc89974-aztw32-2-0-cust43.18-1.cable.virginm.net. [86.30.250.44]) by smtp.gmail.com with ESMTPSA id b7sm66779996wrs.47.2019.01.14.11.42.13 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Mon, 14 Jan 2019 11:42:14 -0800 (PST) From: Srinivas Kandagatla To: robh+dt@kernel.org, gregkh@linuxfoundation.org, arnd@arndb.de Cc: mark.rutland@arm.com, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, bjorn.andersson@linaro.org, bkumar@qti.qualcomm.com, linux-arm-msm@vger.kernel.org, thierry.escande@linaro.org, Srinivas Kandagatla Subject: [PATCH v3 2/5] misc: fastrpc: Add Qualcomm fastrpc basic driver model Date: Mon, 14 Jan 2019 19:41:09 +0000 Message-Id: <20190114194112.32567-3-srinivas.kandagatla@linaro.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190114194112.32567-1-srinivas.kandagatla@linaro.org> References: <20190114194112.32567-1-srinivas.kandagatla@linaro.org> MIME-Version: 1.0 Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org This patch adds basic driver model for qualcomm fastrpc. Each DSP rpmsg channel is represented as fastrpc channel context and is exposed as a character driver for userspace interface. Each compute context bank is represented as fastrpc-session-context, which are dynamically managed by the channel context char device. Co-developed-by: Thierry Escande Signed-off-by: Thierry Escande Signed-off-by: Srinivas Kandagatla --- drivers/misc/Kconfig | 10 ++ drivers/misc/Makefile | 1 + drivers/misc/fastrpc.c | 327 +++++++++++++++++++++++++++++++++++++++++ 3 files changed, 338 insertions(+) create mode 100644 drivers/misc/fastrpc.c -- 2.20.1 diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig index f417b06e11c5..7e0726253755 100644 --- a/drivers/misc/Kconfig +++ b/drivers/misc/Kconfig @@ -295,6 +295,16 @@ config QCOM_COINCELL to maintain PMIC register and RTC state in the absence of external power. +config QCOM_FASTRPC + tristate "Qualcomm FastRPC" + depends on ARCH_QCOM || COMPILE_TEST + depends on RPMSG + help + Provides a communication mechanism that allows for clients to + make remote method invocations across processor boundary to + applications DSP processor. Say M if you want to enable this + module. + config SGI_GRU tristate "SGI GRU driver" depends on X86_UV && SMP diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile index e39ccbbc1b3a..623d002c59ce 100644 --- a/drivers/misc/Makefile +++ b/drivers/misc/Makefile @@ -18,6 +18,7 @@ obj-$(CONFIG_TIFM_CORE) += tifm_core.o obj-$(CONFIG_TIFM_7XX1) += tifm_7xx1.o obj-$(CONFIG_PHANTOM) += phantom.o obj-$(CONFIG_QCOM_COINCELL) += qcom-coincell.o +obj-$(CONFIG_QCOM_FASTRPC) += fastrpc.o obj-$(CONFIG_SENSORS_BH1770) += bh1770glc.o obj-$(CONFIG_SENSORS_APDS990X) += apds990x.o obj-$(CONFIG_SGI_IOC4) += ioc4.o diff --git a/drivers/misc/fastrpc.c b/drivers/misc/fastrpc.c new file mode 100644 index 000000000000..2b2dd7373959 --- /dev/null +++ b/drivers/misc/fastrpc.c @@ -0,0 +1,327 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (c) 2011-2018, The Linux Foundation. All rights reserved. +// Copyright (c) 2018, Linaro Limited + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define ADSP_DOMAIN_ID (0) +#define MDSP_DOMAIN_ID (1) +#define SDSP_DOMAIN_ID (2) +#define CDSP_DOMAIN_ID (3) +#define FASTRPC_DEV_MAX 4 /* adsp, mdsp, slpi, cdsp*/ +#define FASTRPC_MAX_SESSIONS 9 /*8 compute, 1 cpz*/ +#define FASTRPC_CTX_MAX (256) +#define FASTRPC_CTXID_MASK (0xFF0) +#define FASTRPC_DEVICE_NAME "fastrpc" + +#define miscdev_to_cctx(d) container_of(d, struct fastrpc_channel_ctx, miscdev) + +static const char *domains[FASTRPC_DEV_MAX] = { "adsp", "mdsp", + "sdsp", "cdsp"}; + +struct fastrpc_session_ctx { + struct device *dev; + int sid; + bool used; + bool valid; + bool secure; +}; + +struct fastrpc_channel_ctx { + int domain_id; + int sesscount; + struct rpmsg_device *rpdev; + struct fastrpc_session_ctx session[FASTRPC_MAX_SESSIONS]; + spinlock_t lock; + struct idr ctx_idr; + struct list_head users; + struct miscdevice miscdev; +}; + +struct fastrpc_user { + struct list_head user; + struct list_head maps; + struct list_head pending; + + struct fastrpc_channel_ctx *cctx; + struct fastrpc_session_ctx *sctx; + + int tgid; + int pd; + /* Lock for lists */ + spinlock_t lock; + /* lock for allocations */ + struct mutex mutex; +}; + +static struct fastrpc_session_ctx *fastrpc_session_alloc( + struct fastrpc_channel_ctx *cctx, + int secure) +{ + struct fastrpc_session_ctx *session = NULL; + int i; + + spin_lock(&cctx->lock); + for (i = 0; i < cctx->sesscount; i++) { + if (!cctx->session[i].used && cctx->session[i].valid && + cctx->session[i].secure == secure) { + cctx->session[i].used = true; + session = &cctx->session[i]; + break; + } + } + spin_unlock(&cctx->lock); + + return session; +} + +static void fastrpc_session_free(struct fastrpc_channel_ctx *cctx, + struct fastrpc_session_ctx *session) +{ + spin_lock(&cctx->lock); + session->used = false; + spin_unlock(&cctx->lock); +} + +static int fastrpc_device_release(struct inode *inode, struct file *file) +{ + struct fastrpc_user *fl = (struct fastrpc_user *)file->private_data; + struct fastrpc_channel_ctx *cctx = fl->cctx; + + spin_lock(&cctx->lock); + list_del(&fl->user); + spin_unlock(&cctx->lock); + + fastrpc_session_free(fl->cctx, fl->sctx); + + mutex_destroy(&fl->mutex); + kfree(fl); + file->private_data = NULL; + + return 0; +} + +static int fastrpc_device_open(struct inode *inode, struct file *filp) +{ + struct fastrpc_channel_ctx *cctx = miscdev_to_cctx(filp->private_data); + struct fastrpc_user *fl = NULL; + + fl = kzalloc(sizeof(*fl), GFP_KERNEL); + if (!fl) + return -ENOMEM; + + filp->private_data = fl; + spin_lock_init(&fl->lock); + mutex_init(&fl->mutex); + INIT_LIST_HEAD(&fl->pending); + INIT_LIST_HEAD(&fl->maps); + INIT_LIST_HEAD(&fl->user); + fl->tgid = current->tgid; + fl->cctx = cctx; + spin_lock(&cctx->lock); + list_add_tail(&fl->user, &cctx->users); + spin_unlock(&cctx->lock); + fl->sctx = fastrpc_session_alloc(cctx, 0); + + return 0; +} + +static const struct file_operations fastrpc_fops = { + .open = fastrpc_device_open, + .release = fastrpc_device_release, +}; + +static int fastrpc_cb_probe(struct platform_device *pdev) +{ + struct fastrpc_channel_ctx *cctx; + struct fastrpc_session_ctx *sess; + struct device *dev = &pdev->dev; + int i, sessions = 0; + + cctx = dev_get_drvdata(dev->parent); + if (!cctx) + return -EINVAL; + + of_property_read_u32(dev->of_node, "nsessions", &sessions); + + spin_lock(&cctx->lock); + sess = &cctx->session[cctx->sesscount]; + sess->used = false; + sess->valid = true; + sess->dev = dev; + dev_set_drvdata(dev, sess); + sess->secure = of_property_read_bool(dev->of_node, "secured"); + + if (of_property_read_u32(dev->of_node, "reg", &sess->sid)) + dev_info(dev, "FastRPC Session ID not specified in DT\n"); + + if (sessions > 0) { + struct fastrpc_session_ctx *dup_sess; + + for (i = 1; i < sessions; i++) { + if (cctx->sesscount++ >= FASTRPC_MAX_SESSIONS) + break; + dup_sess = &cctx->session[cctx->sesscount]; + memcpy(dup_sess, sess, sizeof(*dup_sess)); + } + } + cctx->sesscount++; + spin_unlock(&cctx->lock); + dma_set_mask(dev, DMA_BIT_MASK(32)); + + return 0; +} + +static int fastrpc_cb_remove(struct platform_device *pdev) +{ + struct fastrpc_channel_ctx *cctx = dev_get_drvdata(pdev->dev.parent); + struct fastrpc_session_ctx *sess = dev_get_drvdata(&pdev->dev); + int i; + + spin_lock(&cctx->lock); + for (i = 1; i < FASTRPC_MAX_SESSIONS; i++) { + if (cctx->session[i].sid == sess->sid) { + cctx->session[i].valid = false; + cctx->sesscount--; + } + } + spin_unlock(&cctx->lock); + + return 0; +} + +static const struct of_device_id fastrpc_match_table[] = { + { .compatible = "qcom,fastrpc-compute-cb", }, + {} +}; + +static struct platform_driver fastrpc_cb_driver = { + .probe = fastrpc_cb_probe, + .remove = fastrpc_cb_remove, + .driver = { + .name = "qcom,fastrpc-cb", + .of_match_table = fastrpc_match_table, + .suppress_bind_attrs = true, + }, +}; + +static int fastrpc_rpmsg_probe(struct rpmsg_device *rpdev) +{ + struct device *rdev = &rpdev->dev; + struct fastrpc_channel_ctx *data; + int i, err, domain_id = 0; + const char *domain; + + data = devm_kzalloc(rdev, sizeof(*data), GFP_KERNEL); + if (!data) + return -ENOMEM; + + err = of_property_read_string(rdev->of_node, "label", &domain); + if (err) { + dev_info(rdev, "FastRPC Domain not specified in DT\n"); + return err; + } + + for (i = 0; i < CDSP_DOMAIN_ID; i++) { + if (!strcmp(domains[i], domain)) { + domain_id = i; + break; + } + } + + if (domain_id > CDSP_DOMAIN_ID) { + dev_info(rdev, "FastRPC Invalid Domain ID %d\n", domain_id); + return -EINVAL; + } + + data->miscdev.minor = MISC_DYNAMIC_MINOR; + data->miscdev.name = kasprintf(GFP_KERNEL, "fastrpc-%s", + domains[domain_id]); + data->miscdev.fops = &fastrpc_fops; + err = misc_register(&data->miscdev); + if (err) + return err; + + dev_set_drvdata(&rpdev->dev, data); + dma_set_mask_and_coherent(rdev, DMA_BIT_MASK(32)); + INIT_LIST_HEAD(&data->users); + spin_lock_init(&data->lock); + idr_init(&data->ctx_idr); + data->domain_id = domain_id; + data->rpdev = rpdev; + + return of_platform_populate(rdev->of_node, NULL, NULL, rdev); +} + +static void fastrpc_rpmsg_remove(struct rpmsg_device *rpdev) +{ + struct fastrpc_channel_ctx *cctx = dev_get_drvdata(&rpdev->dev); + + misc_deregister(&cctx->miscdev); + of_platform_depopulate(&rpdev->dev); + kfree(cctx); +} + +static int fastrpc_rpmsg_callback(struct rpmsg_device *rpdev, void *data, + int len, void *priv, u32 addr) +{ + return 0; +} + +static const struct of_device_id fastrpc_rpmsg_of_match[] = { + { .compatible = "qcom,fastrpc" }, + { }, +}; +MODULE_DEVICE_TABLE(of, fastrpc_rpmsg_of_match); + +static struct rpmsg_driver fastrpc_driver = { + .probe = fastrpc_rpmsg_probe, + .remove = fastrpc_rpmsg_remove, + .callback = fastrpc_rpmsg_callback, + .drv = { + .name = "qcom,fastrpc", + .of_match_table = fastrpc_rpmsg_of_match, + }, +}; + +static int fastrpc_init(void) +{ + int ret; + + ret = platform_driver_register(&fastrpc_cb_driver); + if (ret < 0) { + pr_err("fastrpc: failed to register cb driver\n"); + return ret; + } + + ret = register_rpmsg_driver(&fastrpc_driver); + if (ret < 0) { + pr_err("fastrpc: failed to register rpmsg driver\n"); + platform_driver_unregister(&fastrpc_cb_driver); + return ret; + } + + return 0; +} +module_init(fastrpc_init); + +static void fastrpc_exit(void) +{ + platform_driver_unregister(&fastrpc_cb_driver); + unregister_rpmsg_driver(&fastrpc_driver); +} +module_exit(fastrpc_exit); + +MODULE_ALIAS("fastrpc:fastrpc"); +MODULE_LICENSE("GPL v2");