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[68.147.0.187]) by smtp.gmail.com with ESMTPSA id e8sm5899599pgb.35.2021.03.12.08.24.58 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 12 Mar 2021 08:24:59 -0800 (PST) From: Mathieu Poirier To: bjorn.andersson@linaro.org, ohad@wizery.com Cc: arnaud.pouliquen@st.com, mcoquelin.stm32@gmail.com, alexandre.torgue@st.com, linux-remoteproc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: [PATCH v8 04/17] remoteproc: Properly represent the attached state Date: Fri, 12 Mar 2021 09:24:40 -0700 Message-Id: <20210312162453.1234145-5-mathieu.poirier@linaro.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210312162453.1234145-1-mathieu.poirier@linaro.org> References: <20210312162453.1234145-1-mathieu.poirier@linaro.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210312_162501_650359_3EA21453 X-CRM114-Status: GOOD ( 21.87 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org There is a need to know when a remote processor has been attached to rather than booted by the remoteproc core. In order to avoid manipulating two variables, i.e rproc::autonomous and rproc::state, get rid of the former and simply use the newly introduced RPROC_ATTACHED state. Signed-off-by: Mathieu Poirier Reviewed-by: Peng Fan Reviewed-by: Arnaud Pouliquen --- drivers/remoteproc/remoteproc_core.c | 20 +------------------- drivers/remoteproc/remoteproc_sysfs.c | 5 +---- include/linux/remoteproc.h | 2 -- 3 files changed, 2 insertions(+), 25 deletions(-) diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c index 7b66e1e96e4a..8c7e9f1d50d7 100644 --- a/drivers/remoteproc/remoteproc_core.c +++ b/drivers/remoteproc/remoteproc_core.c @@ -1444,7 +1444,7 @@ static int __rproc_attach(struct rproc *rproc) goto stop_rproc; } - rproc->state = RPROC_RUNNING; + rproc->state = RPROC_ATTACHED; dev_info(dev, "remote processor %s is now attached\n", rproc->name); @@ -1659,14 +1659,6 @@ static int rproc_stop(struct rproc *rproc, bool crashed) rproc->state = RPROC_OFFLINE; - /* - * The remote processor has been stopped and is now offline, which means - * that the next time it is brought back online the remoteproc core will - * be responsible to load its firmware. As such it is no longer - * autonomous. - */ - rproc->autonomous = false; - dev_info(dev, "stopped remote processor %s\n", rproc->name); return 0; @@ -2077,16 +2069,6 @@ int rproc_add(struct rproc *rproc) if (ret < 0) return ret; - /* - * Remind ourselves the remote processor has been attached to rather - * than booted by the remoteproc core. This is important because the - * RPROC_DETACHED state will be lost as soon as the remote processor - * has been attached to. Used in firmware_show() and reset in - * rproc_stop(). - */ - if (rproc->state == RPROC_DETACHED) - rproc->autonomous = true; - /* if rproc is marked always-on, request it to boot */ if (rproc->auto_boot) { ret = rproc_trigger_auto_boot(rproc); diff --git a/drivers/remoteproc/remoteproc_sysfs.c b/drivers/remoteproc/remoteproc_sysfs.c index 4b4aab0d4c4b..f9694def9b54 100644 --- a/drivers/remoteproc/remoteproc_sysfs.c +++ b/drivers/remoteproc/remoteproc_sysfs.c @@ -138,11 +138,8 @@ static ssize_t firmware_show(struct device *dev, struct device_attribute *attr, * If the remote processor has been started by an external * entity we have no idea of what image it is running. As such * simply display a generic string rather then rproc->firmware. - * - * Here we rely on the autonomous flag because a remote processor - * may have been attached to and currently in a running state. */ - if (rproc->autonomous) + if (rproc->state == RPROC_ATTACHED) firmware = "unknown"; return sprintf(buf, "%s\n", firmware); diff --git a/include/linux/remoteproc.h b/include/linux/remoteproc.h index b0a57ff73849..6b0a0ed30a03 100644 --- a/include/linux/remoteproc.h +++ b/include/linux/remoteproc.h @@ -512,7 +512,6 @@ struct rproc_dump_segment { * @table_sz: size of @cached_table * @has_iommu: flag to indicate if remote processor is behind an MMU * @auto_boot: flag to indicate if remote processor should be auto-started - * @autonomous: true if an external entity has booted the remote processor * @dump_segments: list of segments in the firmware * @nb_vdev: number of vdev currently handled by rproc * @char_dev: character device of the rproc @@ -549,7 +548,6 @@ struct rproc { size_t table_sz; bool has_iommu; bool auto_boot; - bool autonomous; struct list_head dump_segments; int nb_vdev; u8 elf_class;