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Fri, 26 Feb 2021 17:14:39 +0100 Received: from euls16034.sgp.st.com (euls16034.sgp.st.com [10.75.44.20]) by beta.dmz-eu.st.com (STMicroelectronics) with ESMTP id 94EBE100034; Fri, 26 Feb 2021 17:14:38 +0100 (CET) Received: from Webmail-eu.st.com (sfhdag2node3.st.com [10.75.127.6]) by euls16034.sgp.st.com (STMicroelectronics) with ESMTP id 8355E2A4D98; Fri, 26 Feb 2021 17:14:38 +0100 (CET) Received: from lmecxl0889.lme.st.com (10.75.127.48) by SFHDAG2NODE3.st.com (10.75.127.6) with Microsoft SMTP Server (TLS) id 15.0.1473.3; Fri, 26 Feb 2021 17:14:37 +0100 Subject: Re: [PATCH v6 05/16] remoteproc: Add new get_loaded_rsc_table() to rproc_ops To: Mathieu Poirier , , , References: <20210223233515.3468677-1-mathieu.poirier@linaro.org> <20210223233515.3468677-6-mathieu.poirier@linaro.org> From: Arnaud POULIQUEN Message-ID: Date: Fri, 26 Feb 2021 17:14:36 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: <20210223233515.3468677-6-mathieu.poirier@linaro.org> Content-Language: en-US X-Originating-IP: [10.75.127.48] X-ClientProxiedBy: SFHDAG1NODE2.st.com (10.75.127.2) To SFHDAG2NODE3.st.com (10.75.127.6) X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.369, 18.0.761 definitions=2021-02-26_05:2021-02-26, 2021-02-26 signatures=0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210226_111445_716332_EB56462D X-CRM114-Status: GOOD ( 31.87 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-arm-kernel@lists.infradead.org, linux-remoteproc@vger.kernel.org, alexandre.torgue@st.com, mcoquelin.stm32@gmail.com, linux-kernel@vger.kernel.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hi Mathieu, On 2/24/21 12:35 AM, Mathieu Poirier wrote: > Add a new get_loaded_rsc_table() operation in order to support > scenarios where the remoteproc core has booted a remote processor > and detaches from it. When re-attaching to the remote processor, > the core needs to know where the resource table has been placed > in memory. > > Signed-off-by: Mathieu Poirier > --- > New for V6: > - Don't return an error if a resource table doesn't exist. > --- > > drivers/remoteproc/remoteproc_core.c | 32 ++++++++++++++++++++++++ > drivers/remoteproc/remoteproc_internal.h | 10 ++++++++ > include/linux/remoteproc.h | 6 ++++- > 3 files changed, 47 insertions(+), 1 deletion(-) > > diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c > index 8c7e9f1d50d7..0012b7bdce24 100644 > --- a/drivers/remoteproc/remoteproc_core.c > +++ b/drivers/remoteproc/remoteproc_core.c > @@ -1537,6 +1537,32 @@ static int rproc_fw_boot(struct rproc *rproc, const struct firmware *fw) > return ret; > } > > +static int rproc_set_loaded_rsc_table(struct rproc *rproc) > +{ > + struct resource_table *table_ptr; > + struct device *dev = &rproc->dev; > + size_t table_sz; > + int ret; > + > + table_ptr = rproc_get_loaded_rsc_table(rproc, &table_sz); > + if (!table_ptr) { > + /* Not having a resource table is acceptable */ > + return 0; Would it be an over protection to set rproc->table_ptr to NULL here? else Reviewed-by: Arnaud Pouliquen Thanks, Arnaud > + } > + > + if (IS_ERR(table_ptr)) { > + ret = PTR_ERR(table_ptr); > + dev_err(dev, "can't load resource table: %d\n", ret); > + return ret; > + } > + > + rproc->cached_table = NULL; > + rproc->table_ptr = table_ptr; > + rproc->table_sz = table_sz; > + > + return 0; > +} > + > /* > * Attach to remote processor - similar to rproc_fw_boot() but without > * the steps that deal with the firmware image. > @@ -1556,6 +1582,12 @@ static int rproc_attach(struct rproc *rproc) > return ret; > } > > + ret = rproc_set_loaded_rsc_table(rproc); > + if (ret) { > + dev_err(dev, "can't load resource table: %d\n", ret); > + goto disable_iommu; > + } > + > /* reset max_notifyid */ > rproc->max_notifyid = -1; > > diff --git a/drivers/remoteproc/remoteproc_internal.h b/drivers/remoteproc/remoteproc_internal.h > index c34002888d2c..4f73aac7e60d 100644 > --- a/drivers/remoteproc/remoteproc_internal.h > +++ b/drivers/remoteproc/remoteproc_internal.h > @@ -177,6 +177,16 @@ struct resource_table *rproc_find_loaded_rsc_table(struct rproc *rproc, > return NULL; > } > > +static inline > +struct resource_table *rproc_get_loaded_rsc_table(struct rproc *rproc, > + size_t *size) > +{ > + if (rproc->ops->get_loaded_rsc_table) > + return rproc->ops->get_loaded_rsc_table(rproc, size); > + > + return NULL; > +} > + > static inline > bool rproc_u64_fit_in_size_t(u64 val) > { > diff --git a/include/linux/remoteproc.h b/include/linux/remoteproc.h > index 6b0a0ed30a03..51538a7d120d 100644 > --- a/include/linux/remoteproc.h > +++ b/include/linux/remoteproc.h > @@ -368,7 +368,9 @@ enum rsc_handling_status { > * RSC_HANDLED if resource was handled, RSC_IGNORED if not handled and a > * negative value on error > * @load_rsc_table: load resource table from firmware image > - * @find_loaded_rsc_table: find the loaded resouce table > + * @find_loaded_rsc_table: find the loaded resource table from firmware image > + * @get_loaded_rsc_table: get resource table installed in memory > + * by external entity > * @load: load firmware to memory, where the remote processor > * expects to find it > * @sanity_check: sanity check the fw image > @@ -390,6 +392,8 @@ struct rproc_ops { > int offset, int avail); > struct resource_table *(*find_loaded_rsc_table)( > struct rproc *rproc, const struct firmware *fw); > + struct resource_table *(*get_loaded_rsc_table)( > + struct rproc *rproc, size_t *size); > int (*load)(struct rproc *rproc, const struct firmware *fw); > int (*sanity_check)(struct rproc *rproc, const struct firmware *fw); > u64 (*get_boot_addr)(struct rproc *rproc, const struct firmware *fw); > _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel