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Tue, 21 Apr 2020 09:12:44 -0500 Received: from DFLE114.ent.ti.com (10.64.6.35) by DFLE114.ent.ti.com (10.64.6.35) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1847.3; Tue, 21 Apr 2020 09:12:44 -0500 Received: from lelv0327.itg.ti.com (10.180.67.183) by DFLE114.ent.ti.com (10.64.6.35) 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; Tue, 21 Apr 2020 09:12:44 -0500 Received: from [10.250.70.56] (ileax41-snat.itg.ti.com [10.172.224.153]) by lelv0327.itg.ti.com (8.15.2/8.15.2) with ESMTP id 03LECh1l124572; Tue, 21 Apr 2020 09:12:43 -0500 Subject: Re: [PATCH 1/2] remoteproc: Add prepare and unprepare ops To: Bjorn Andersson References: <20200417002036.24359-1-s-anna@ti.com> <20200417002036.24359-2-s-anna@ti.com> <20200421025254.GK1868936@builder.lan> From: Suman Anna Message-ID: <2feee391-9f8e-410e-2a20-5b5bdd949940@ti.com> Date: Tue, 21 Apr 2020 09:12:43 -0500 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.7.0 MIME-Version: 1.0 In-Reply-To: <20200421025254.GK1868936@builder.lan> Content-Language: en-US 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-20200421_071255_380028_FBF0AC96 X-CRM114-Status: GOOD ( 21.08 ) 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: Loic Pallardy , linux-remoteproc@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Mathieu Poirier , linux-kernel@vger.kernel.org Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 4/20/20 9:52 PM, Bjorn Andersson wrote: > On Thu 16 Apr 17:20 PDT 2020, Suman Anna wrote: > >> 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 > > Do we have an inbound user of these new oops? Yes, both the TI K3 R5F and DSP remoteproc drivers use these ops, the patches are already on the lists. regards Suman > > Regards, > Bjorn > >> --- >> 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