From patchwork Thu Nov 26 10:18:16 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Maulik Shah X-Patchwork-Id: 333123 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E7BA9C63777 for ; Thu, 26 Nov 2020 10:19:09 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7DA7D21741 for ; Thu, 26 Nov 2020 10:19:09 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=mg.codeaurora.org header.i=@mg.codeaurora.org header.b="wg8tQ/Dt" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387805AbgKZKSx (ORCPT ); Thu, 26 Nov 2020 05:18:53 -0500 Received: from z5.mailgun.us ([104.130.96.5]:36268 "EHLO z5.mailgun.us" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2387758AbgKZKSx (ORCPT ); Thu, 26 Nov 2020 05:18:53 -0500 DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1606385932; h=References: In-Reply-To: Message-Id: Date: Subject: Cc: To: From: Sender; bh=B7LBpxIQgQFjP8GwwvZLTBgtnCZkRDCBJW0mPGTE5dw=; b=wg8tQ/Dtz2Bx9MMNFUrX3Rp8no77BLeJBLbFMOSvGi+iIHZULmzYyG1XYzTjRvopyxiB6DK7 2X75gYxIA3CVq1r3CeLMqB1UJ1AVcV8+gJE88xdRHdERJ7vY+R2cmt8HO8GzAPdxZBYYa1AS uKKArimHrcB3M2wPwFLuTquT7DQ= X-Mailgun-Sending-Ip: 104.130.96.5 X-Mailgun-Sid: WyI1MzIzYiIsICJsaW51eC1hcm0tbXNtQHZnZXIua2VybmVsLm9yZyIsICJiZTllNGEiXQ== Received: from smtp.codeaurora.org (ec2-35-166-182-171.us-west-2.compute.amazonaws.com [35.166.182.171]) by smtp-out-n02.prod.us-west-2.postgun.com with SMTP id 5fbf81071dba509aaedacc25 (version=TLS1.2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256); Thu, 26 Nov 2020 10:18:47 GMT Sender: mkshah=codeaurora.org@mg.codeaurora.org Received: by smtp.codeaurora.org (Postfix, from userid 1001) id 7D869C43465; Thu, 26 Nov 2020 10:18:47 +0000 (UTC) Received: from mkshah-linux.qualcomm.com (unknown [202.46.22.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: mkshah) by smtp.codeaurora.org (Postfix) with ESMTPSA id 6D50CC43460; Thu, 26 Nov 2020 10:18:43 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 6D50CC43460 Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; spf=fail smtp.mailfrom=mkshah@codeaurora.org From: Maulik Shah To: bjorn.andersson@linaro.org, andy.gross@linaro.org Cc: linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, tkjos@google.com, dianders@chromium.org, ilina@codeaurora.org, lsrao@codeaurora.org, Maulik Shah Subject: [PATCH 1/3] drivers: qcom: rpmh: Disallow active requests in solver mode Date: Thu, 26 Nov 2020 15:48:16 +0530 Message-Id: <1606385898-8609-2-git-send-email-mkshah@codeaurora.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1606385898-8609-1-git-send-email-mkshah@codeaurora.org> References: <1606385898-8609-1-git-send-email-mkshah@codeaurora.org> Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org From: Lina Iyer Controllers may be in 'solver' state, where they could be in autonomous mode executing low power modes for their hardware and as such are not available for sending active votes. Device driver may notify RPMH that the controller is in solver mode and when in such mode, disallow requests from platform drivers for state change using the RSC. Signed-off-by: Lina Iyer Signed-off-by: Maulik Shah --- drivers/soc/qcom/rpmh-internal.h | 5 ++++ drivers/soc/qcom/rpmh-rsc.c | 31 ++++++++++++++++++++++ drivers/soc/qcom/rpmh.c | 56 ++++++++++++++++++++++++++++++++++++++++ drivers/soc/qcom/trace-rpmh.h | 20 ++++++++++++++ include/soc/qcom/rpmh.h | 5 ++++ 5 files changed, 117 insertions(+) diff --git a/drivers/soc/qcom/rpmh-internal.h b/drivers/soc/qcom/rpmh-internal.h index 344ba68..79486d6 100644 --- a/drivers/soc/qcom/rpmh-internal.h +++ b/drivers/soc/qcom/rpmh-internal.h @@ -77,12 +77,14 @@ struct rpmh_request { * @cache: the list of cached requests * @cache_lock: synchronize access to the cache data * @dirty: was the cache updated since flush + * @in_solver_mode: Controller is busy in solver mode * @batch_cache: Cache sleep and wake requests sent as batch */ struct rpmh_ctrlr { struct list_head cache; spinlock_t cache_lock; bool dirty; + bool in_solver_mode; struct list_head batch_cache; }; @@ -94,6 +96,7 @@ struct rpmh_ctrlr { * @tcs_base: Start address of the TCS registers in this controller. * @id: Instance id in the controller (Direct Resource Voter). * @num_tcs: Number of TCSes in this DRV. + * @in_solver_mode: Controller is busy in solver mode * @rsc_pm: CPU PM notifier for controller. * Used when solver mode is not present. * @cpus_in_pm: Number of CPUs not in idle power collapse. @@ -116,6 +119,7 @@ struct rsc_drv { void __iomem *tcs_base; int id; int num_tcs; + bool in_solver_mode; struct notifier_block rsc_pm; atomic_t cpus_in_pm; struct tcs_group tcs[TCS_TYPE_NR]; @@ -129,6 +133,7 @@ int rpmh_rsc_send_data(struct rsc_drv *drv, const struct tcs_request *msg); int rpmh_rsc_write_ctrl_data(struct rsc_drv *drv, const struct tcs_request *msg); void rpmh_rsc_invalidate(struct rsc_drv *drv); +int rpmh_rsc_mode_solver_set(struct rsc_drv *drv, bool enable); void rpmh_tx_done(const struct tcs_request *msg, int r); int rpmh_flush(struct rpmh_ctrlr *ctrlr); diff --git a/drivers/soc/qcom/rpmh-rsc.c b/drivers/soc/qcom/rpmh-rsc.c index 37969dc..ffb4ca7 100644 --- a/drivers/soc/qcom/rpmh-rsc.c +++ b/drivers/soc/qcom/rpmh-rsc.c @@ -638,6 +638,12 @@ int rpmh_rsc_send_data(struct rsc_drv *drv, const struct tcs_request *msg) spin_lock_irqsave(&drv->lock, flags); + if (drv->in_solver_mode) { + /* Controller is busy in 'solver' mode */ + spin_unlock_irqrestore(&drv->lock, flags); + return -EBUSY; + } + /* Wait forever for a free tcs. It better be there eventually! */ wait_event_lock_irq(drv->tcs_wait, (tcs_id = claim_tcs_for_req(drv, tcs, msg)) >= 0, @@ -859,6 +865,31 @@ static int rpmh_rsc_cpu_pm_callback(struct notifier_block *nfb, return ret; } +/** + * rpmh_rsc_mode_solver_set() - Enable/disable solver mode. + * @drv: The controller. + * @enable: Boolean state to be set - true/false + * + * Return: + * * 0 - success + * * -EBUSY - AMCs are busy + */ +int rpmh_rsc_mode_solver_set(struct rsc_drv *drv, bool enable) +{ + int ret = -EBUSY; + + if (spin_trylock(&drv->lock)) { + if (!enable || !rpmh_rsc_ctrlr_is_busy(drv)) { + drv->in_solver_mode = enable; + trace_rpmh_solver_set(drv, enable); + ret = 0; + } + spin_unlock(&drv->lock); + } + + return ret; +} + static int rpmh_probe_tcs_config(struct platform_device *pdev, struct rsc_drv *drv, void __iomem *base) { diff --git a/drivers/soc/qcom/rpmh.c b/drivers/soc/qcom/rpmh.c index 01765ee..cbe6b96 100644 --- a/drivers/soc/qcom/rpmh.c +++ b/drivers/soc/qcom/rpmh.c @@ -76,6 +76,22 @@ static struct rpmh_ctrlr *get_rpmh_ctrlr(const struct device *dev) return &drv->client; } +static int check_ctrlr_state(struct rpmh_ctrlr *ctrlr, enum rpmh_state state) +{ + int ret = 0; + + if (state != RPMH_ACTIVE_ONLY_STATE) + return ret; + + /* Do not allow sending active votes when in solver mode */ + spin_lock(&ctrlr->cache_lock); + if (ctrlr->in_solver_mode) + ret = -EBUSY; + spin_unlock(&ctrlr->cache_lock); + + return ret; +} + void rpmh_tx_done(const struct tcs_request *msg, int r) { struct rpmh_request *rpm_msg = container_of(msg, struct rpmh_request, @@ -229,9 +245,14 @@ static int __fill_rpmh_msg(struct rpmh_request *req, enum rpmh_state state, int rpmh_write_async(const struct device *dev, enum rpmh_state state, const struct tcs_cmd *cmd, u32 n) { + struct rpmh_ctrlr *ctrlr = get_rpmh_ctrlr(dev); struct rpmh_request *rpm_msg; int ret; + ret = check_ctrlr_state(ctrlr, state); + if (ret) + return ret; + rpm_msg = kzalloc(sizeof(*rpm_msg), GFP_ATOMIC); if (!rpm_msg) return -ENOMEM; @@ -262,8 +283,13 @@ int rpmh_write(const struct device *dev, enum rpmh_state state, { DECLARE_COMPLETION_ONSTACK(compl); DEFINE_RPMH_MSG_ONSTACK(dev, state, &compl, rpm_msg); + struct rpmh_ctrlr *ctrlr = get_rpmh_ctrlr(dev); int ret; + ret = check_ctrlr_state(ctrlr, state); + if (ret) + return ret; + ret = __fill_rpmh_msg(&rpm_msg, state, cmd, n); if (ret) return ret; @@ -338,6 +364,10 @@ int rpmh_write_batch(const struct device *dev, enum rpmh_state state, int ret, i; void *ptr; + ret = check_ctrlr_state(ctrlr, state); + if (ret) + return ret; + if (!cmd || !n) return -EINVAL; @@ -505,3 +535,29 @@ void rpmh_invalidate(const struct device *dev) spin_unlock_irqrestore(&ctrlr->cache_lock, flags); } EXPORT_SYMBOL(rpmh_invalidate); + +/** + * rpmh_mode_solver_set() - Indicate that the RSC controller hardware has + * been configured to be in solver mode + * + * @dev: The device making the request + * @enable: Boolean value indicating if the controller is in solver mode. + * + * Return: + * * 0 - Success + * * Error code - Otherwise + */ +int rpmh_mode_solver_set(const struct device *dev, bool enable) +{ + int ret; + struct rpmh_ctrlr *ctrlr = get_rpmh_ctrlr(dev); + + spin_lock(&ctrlr->cache_lock); + ret = rpmh_rsc_mode_solver_set(ctrlr_to_drv(ctrlr), enable); + if (!ret) + ctrlr->in_solver_mode = enable; + spin_unlock(&ctrlr->cache_lock); + + return ret; +} +EXPORT_SYMBOL(rpmh_mode_solver_set); diff --git a/drivers/soc/qcom/trace-rpmh.h b/drivers/soc/qcom/trace-rpmh.h index feb0cb4..b2b934c 100644 --- a/drivers/soc/qcom/trace-rpmh.h +++ b/drivers/soc/qcom/trace-rpmh.h @@ -71,6 +71,26 @@ TRACE_EVENT(rpmh_send_msg, __entry->addr, __entry->data, __entry->wait) ); +TRACE_EVENT(rpmh_solver_set, + + TP_PROTO(struct rsc_drv *d, bool set), + + TP_ARGS(d, set), + + TP_STRUCT__entry( + __string(name, d->name) + __field(bool, set) + ), + + TP_fast_assign( + __assign_str(name, d->name); + __entry->set = set; + ), + + TP_printk("%s: solver mode set: %d", + __get_str(name), __entry->set) +); + #endif /* _TRACE_RPMH_H */ #undef TRACE_INCLUDE_PATH diff --git a/include/soc/qcom/rpmh.h b/include/soc/qcom/rpmh.h index bdbee1a..fa8bb53 100644 --- a/include/soc/qcom/rpmh.h +++ b/include/soc/qcom/rpmh.h @@ -20,6 +20,8 @@ int rpmh_write_async(const struct device *dev, enum rpmh_state state, int rpmh_write_batch(const struct device *dev, enum rpmh_state state, const struct tcs_cmd *cmd, u32 *n); +int rpmh_mode_solver_set(const struct device *dev, bool enable); + void rpmh_invalidate(const struct device *dev); #else @@ -38,6 +40,9 @@ static inline int rpmh_write_batch(const struct device *dev, const struct tcs_cmd *cmd, u32 *n) { return -ENODEV; } +static int rpmh_mode_solver_set(const struct device *dev, bool enable) +{ return -ENODEV; } + static inline void rpmh_invalidate(const struct device *dev) { } From patchwork Thu Nov 26 10:18:17 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Maulik Shah X-Patchwork-Id: 333122 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 17270C64E7B for ; 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Thu, 26 Nov 2020 10:18:50 GMT Sender: mkshah=codeaurora.org@mg.codeaurora.org Received: by smtp.codeaurora.org (Postfix, from userid 1001) id 3EBECC43460; Thu, 26 Nov 2020 10:18:50 +0000 (UTC) Received: from mkshah-linux.qualcomm.com (unknown [202.46.22.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: mkshah) by smtp.codeaurora.org (Postfix) with ESMTPSA id E864DC43463; Thu, 26 Nov 2020 10:18:46 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org E864DC43463 Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; spf=fail smtp.mailfrom=mkshah@codeaurora.org From: Maulik Shah To: bjorn.andersson@linaro.org, andy.gross@linaro.org Cc: linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, tkjos@google.com, dianders@chromium.org, ilina@codeaurora.org, lsrao@codeaurora.org, Maulik Shah Subject: [PATCH 2/3] soc: qcom: rpmh: Add rpmh_write_sleep_and_wake() function Date: Thu, 26 Nov 2020 15:48:17 +0530 Message-Id: <1606385898-8609-3-git-send-email-mkshah@codeaurora.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1606385898-8609-1-git-send-email-mkshah@codeaurora.org> References: <1606385898-8609-1-git-send-email-mkshah@codeaurora.org> Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Let RPMH clients call rpmh_write_sleep_and_wake() to immediately write cached sleep and wake data to the TCSes. Signed-off-by: Maulik Shah --- drivers/soc/qcom/rpmh.c | 16 ++++++++++++++++ include/soc/qcom/rpmh.h | 5 +++++ 2 files changed, 21 insertions(+) diff --git a/drivers/soc/qcom/rpmh.c b/drivers/soc/qcom/rpmh.c index cbe6b96..725b8f0 100644 --- a/drivers/soc/qcom/rpmh.c +++ b/drivers/soc/qcom/rpmh.c @@ -515,6 +515,22 @@ int rpmh_flush(struct rpmh_ctrlr *ctrlr) } /** + * rpmh_write_sleep_and_wake() - Writes the buffered wake and sleep sets + * to TCSes + * + * @dev: The device making the request + * + * Return: + * * 0 - Success + * * Error code - Otherwise + */ +int rpmh_write_sleep_and_wake(const struct device *dev) +{ + return rpmh_flush(get_rpmh_ctrlr(dev)); +} +EXPORT_SYMBOL(rpmh_write_sleep_and_wake); + +/** * rpmh_invalidate: Invalidate sleep and wake sets in batch_cache * * @dev: The device making the request diff --git a/include/soc/qcom/rpmh.h b/include/soc/qcom/rpmh.h index fa8bb53..59b68f8 100644 --- a/include/soc/qcom/rpmh.h +++ b/include/soc/qcom/rpmh.h @@ -22,6 +22,8 @@ int rpmh_write_batch(const struct device *dev, enum rpmh_state state, int rpmh_mode_solver_set(const struct device *dev, bool enable); +int rpmh_write_sleep_and_wake(const struct device *dev); + void rpmh_invalidate(const struct device *dev); #else @@ -43,6 +45,9 @@ static inline int rpmh_write_batch(const struct device *dev, static int rpmh_mode_solver_set(const struct device *dev, bool enable) { return -ENODEV; } +static int rpmh_write_sleep_and_wake(const struct device *dev) +{ return -ENODEV; } + static inline void rpmh_invalidate(const struct device *dev) { }