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Thu, 16 Apr 2020 19:20:41 -0500 Received: from DLEE113.ent.ti.com (157.170.170.24) by DLEE112.ent.ti.com (157.170.170.23) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1847.3; Thu, 16 Apr 2020 19:20:40 -0500 Received: from fllv0040.itg.ti.com (10.64.41.20) by DLEE113.ent.ti.com (157.170.170.24) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1847.3 via Frontend Transport; Thu, 16 Apr 2020 19:20:40 -0500 Received: from fllv0103.dal.design.ti.com (fllv0103.dal.design.ti.com [10.247.120.73]) by fllv0040.itg.ti.com (8.15.2/8.15.2) with ESMTP id 03H0KeWE074782; Thu, 16 Apr 2020 19:20:40 -0500 Received: from localhost ([10.250.70.56]) by fllv0103.dal.design.ti.com (8.14.7/8.14.7) with ESMTP id 03H0Ke18060525; Thu, 16 Apr 2020 19:20:40 -0500 From: Suman Anna To: Bjorn Andersson , Mathieu Poirier Subject: [PATCH 1/2] remoteproc: Add prepare and unprepare ops Date: Thu, 16 Apr 2020 19:20:35 -0500 Message-ID: <20200417002036.24359-2-s-anna@ti.com> X-Mailer: git-send-email 2.26.0 In-Reply-To: <20200417002036.24359-1-s-anna@ti.com> References: <20200417002036.24359-1-s-anna@ti.com> MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200416_172104_989514_2E171175 X-CRM114-Status: GOOD ( 16.83 ) 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: Suman Anna , Loic Pallardy , linux-remoteproc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: Loic Pallardy On some SoC architecture, it is needed to enable HW like clock, bus, regulator, memory region... before loading co-processor firmware. This patch introduces prepare and unprepare ops to execute platform specific function before firmware loading and after stop execution. Signed-off-by: Loic Pallardy Signed-off-by: Suman Anna Reviewed-by: Bjorn Andersson Reviewed-by: Mathieu Poirier --- v1: - Make the direct ops into inline helper functions in line with the comments on the MCU sync series (v1 comments). No change in functionality. - Picked up the Reviewed-by tags v0: https://patchwork.kernel.org/patch/11456383/ drivers/remoteproc/remoteproc_core.c | 15 ++++++++++++++- drivers/remoteproc/remoteproc_internal.h | 16 ++++++++++++++++ include/linux/remoteproc.h | 4 ++++ 3 files changed, 34 insertions(+), 1 deletion(-) diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c index d681eeb962b6..e38f627059ac 100644 --- a/drivers/remoteproc/remoteproc_core.c +++ b/drivers/remoteproc/remoteproc_core.c @@ -1394,12 +1394,19 @@ static int rproc_fw_boot(struct rproc *rproc, const struct firmware *fw) return ret; } + /* Prepare rproc for firmware loading if needed */ + ret = rproc_prepare_device(rproc); + if (ret) { + dev_err(dev, "can't prepare rproc %s: %d\n", rproc->name, ret); + goto disable_iommu; + } + rproc->bootaddr = rproc_get_boot_addr(rproc, fw); /* Load resource table, core dump segment list etc from the firmware */ ret = rproc_parse_fw(rproc, fw); if (ret) - goto disable_iommu; + goto unprepare_rproc; /* reset max_notifyid */ rproc->max_notifyid = -1; @@ -1433,6 +1440,9 @@ static int rproc_fw_boot(struct rproc *rproc, const struct firmware *fw) kfree(rproc->cached_table); rproc->cached_table = NULL; rproc->table_ptr = NULL; +unprepare_rproc: + /* release HW resources if needed */ + rproc_unprepare_device(rproc); disable_iommu: rproc_disable_iommu(rproc); return ret; @@ -1838,6 +1848,9 @@ void rproc_shutdown(struct rproc *rproc) /* clean up all acquired resources */ rproc_resource_cleanup(rproc); + /* release HW resources if needed */ + rproc_unprepare_device(rproc); + rproc_disable_iommu(rproc); /* Free the copy of the resource table */ diff --git a/drivers/remoteproc/remoteproc_internal.h b/drivers/remoteproc/remoteproc_internal.h index b389dc79da81..101e6be8d240 100644 --- a/drivers/remoteproc/remoteproc_internal.h +++ b/drivers/remoteproc/remoteproc_internal.h @@ -64,6 +64,22 @@ struct resource_table *rproc_elf_find_loaded_rsc_table(struct rproc *rproc, struct rproc_mem_entry * rproc_find_carveout_by_name(struct rproc *rproc, const char *name, ...); +static inline int rproc_prepare_device(struct rproc *rproc) +{ + if (rproc->ops->prepare) + return rproc->ops->prepare(rproc); + + return 0; +} + +static inline int rproc_unprepare_device(struct rproc *rproc) +{ + if (rproc->ops->unprepare) + return rproc->ops->unprepare(rproc); + + return 0; +} + static inline int rproc_fw_sanity_check(struct rproc *rproc, const struct firmware *fw) { diff --git a/include/linux/remoteproc.h b/include/linux/remoteproc.h index 38607107b7cb..b8481ac969f1 100644 --- a/include/linux/remoteproc.h +++ b/include/linux/remoteproc.h @@ -355,6 +355,8 @@ enum rsc_handling_status { /** * struct rproc_ops - platform-specific device handlers + * @prepare: prepare device for code loading + * @unprepare: unprepare device after stop * @start: power on the device and boot it * @stop: power off the device * @kick: kick a virtqueue (virtqueue id given as a parameter) @@ -373,6 +375,8 @@ enum rsc_handling_status { * panic at least the returned number of milliseconds */ struct rproc_ops { + int (*prepare)(struct rproc *rproc); + int (*unprepare)(struct rproc *rproc); int (*start)(struct rproc *rproc); int (*stop)(struct rproc *rproc); void (*kick)(struct rproc *rproc, int vqid); -- 2.26.0 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel