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Tue, 06 Nov 2018 09:22:03 -0800 (PST) Date: Tue, 6 Nov 2018 09:22:02 -0800 From: Moritz Fischer To: richard.gong@linux.intel.com Cc: gregkh@linuxfoundation.org, catalin.marinas@arm.com, will.deacon@arm.com, dinguyen@kernel.org, robh+dt@kernel.org, mark.rutland@arm.com, atull@kernel.org, mdf@kernel.org, arnd@arndb.de, corbet@lwn.net, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, linux-fpga@vger.kernel.org, linux-doc@vger.kernel.org, todd.riffel@intel.com, richard.gong@intel.com Subject: Re: [PATCHv10 8/8] firmware: add remote status update client support Message-ID: <20181106172202.GA4042@archbook> References: <1541523172-5171-1-git-send-email-richard.gong@linux.intel.com> <1541523172-5171-9-git-send-email-richard.gong@linux.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1541523172-5171-9-git-send-email-richard.gong@linux.intel.com> User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Richard, On Tue, Nov 06, 2018 at 10:52:52AM -0600, richard.gong@linux.intel.com wrote: > From: Richard Gong > > Extend Intel Stratix10 service layer to support the second service layer > client, Remote Status Update (RSU). > > RSU is used to provide our customers with protection against loading bas Nit: 'bas' -> 'bad' > bitstreams onto their devices when those device are booting from flash. > > Signed-off-by: Richard Gong > Signed-off-by: Alan Tull > --- > v7: this patch is added in patch set version 7 > v8: no change > v9: add case for COMMAND_RSU_UPDATE at svc_thread_recv_status_ok() at > stratix10-svc.c file > add RSU related definitions at stratix10-smc.h file > v10: s/misc/firmware at commit header > --- > drivers/firmware/stratix10-svc.c | 35 +++++++++++++++- > include/linux/firmware/intel/stratix10-smc.h | 47 ++++++++++++++++++++++ > .../linux/firmware/intel/stratix10-svc-client.h | 20 ++++++++- > 3 files changed, 98 insertions(+), 4 deletions(-) > > diff --git a/drivers/firmware/stratix10-svc.c b/drivers/firmware/stratix10-svc.c > index 898e588..ae99221 100644 > --- a/drivers/firmware/stratix10-svc.c > +++ b/drivers/firmware/stratix10-svc.c > @@ -34,7 +34,7 @@ > * timeout is set to 30 seconds (30 * 1000) at Intel Stratix10 SoC. > */ > #define SVC_NUM_DATA_IN_FIFO 32 > -#define SVC_NUM_CHANNEL 1 > +#define SVC_NUM_CHANNEL 2 > #define FPGA_CONFIG_DATA_CLAIM_TIMEOUT_MS 200 > #define FPGA_CONFIG_STATUS_TIMEOUT_SEC 30 > > @@ -271,7 +271,7 @@ static void svc_thread_cmd_config_status(struct stratix10_svc_controller *ctrl, > * @cb_data: pointer to callback data structure to service client > * @res: result from SMC or HVC call > * > - * Send back the correspond status to the service client (FPGA manager etc). > + * Send back the correspond status to the service clients. > */ > static void svc_thread_recv_status_ok(struct stratix10_svc_data *p_data, > struct stratix10_svc_cb_data *cb_data, > @@ -295,6 +295,9 @@ static void svc_thread_recv_status_ok(struct stratix10_svc_data *p_data, > case COMMAND_RECONFIG_STATUS: > cb_data->status = BIT(SVC_STATUS_RECONFIG_COMPLETED); > break; > + case COMMAND_RSU_UPDATE: > + cb_data->status = BIT(SVC_STATUS_RSU_OK); > + break; > default: > pr_warn("it shouldn't happen\n"); > break; > @@ -373,6 +376,16 @@ static int svc_normal_to_secure_thread(void *data) > a1 = 0; > a2 = 0; > break; > + case COMMAND_RSU_STATUS: > + a0 = INTEL_SIP_SMC_RSU_STATUS; > + a1 = 0; > + a2 = 0; > + break; > + case COMMAND_RSU_UPDATE: > + a0 = INTEL_SIP_SMC_RSU_UPDATE; > + a1 = pdata->arg[0]; > + a2 = 0; > + break; > default: > pr_warn("it shouldn't happen\n"); > break; > @@ -389,6 +402,19 @@ static int svc_normal_to_secure_thread(void *data) > (unsigned int)res.a1, (unsigned int)res.a2); > pr_debug(" res.a3=0x%016x\n", (unsigned int)res.a3); > > + if (pdata->command == COMMAND_RSU_STATUS) { > + if (res.a0 == INTEL_SIP_SMC_RSU_ERROR) > + cbdata->status = BIT(SVC_STATUS_RSU_ERROR); > + else > + cbdata->status = BIT(SVC_STATUS_RSU_OK); > + > + cbdata->kaddr1 = &res; > + cbdata->kaddr2 = NULL; > + cbdata->kaddr3 = NULL; > + pdata->chan->scl->receive_cb(pdata->chan->scl, cbdata); > + continue; > + } > + > switch (res.a0) { > case INTEL_SIP_SMC_STATUS_OK: > svc_thread_recv_status_ok(pdata, cbdata, res); > @@ -941,6 +967,11 @@ static int stratix10_svc_drv_probe(struct platform_device *pdev) > chans[0].name = SVC_CLIENT_FPGA; > spin_lock_init(&chans[0].lock); > > + chans[1].scl = NULL; > + chans[1].ctrl = controller; > + chans[1].name = SVC_CLIENT_RSU; > + spin_lock_init(&chans[1].lock); > + > list_add_tail(&controller->node, &svc_ctrl); > platform_set_drvdata(pdev, controller); > > diff --git a/include/linux/firmware/intel/stratix10-smc.h b/include/linux/firmware/intel/stratix10-smc.h > index a109e4c..5be5dab 100644 > --- a/include/linux/firmware/intel/stratix10-smc.h > +++ b/include/linux/firmware/intel/stratix10-smc.h > @@ -67,6 +67,12 @@ > * > * INTEL_SIP_SMC_FPGA_CONFIG_STATUS_ERROR: > * There is error during the FPGA configuration process. > + * > + * INTEL_SIP_SMC_REG_ERROR: > + * There is error during a read or write operation of the protected registers. > + * > + * INTEL_SIP_SMC_RSU_ERROR: > + * There is error during a remote status update. > */ > #define INTEL_SIP_SMC_RETURN_UNKNOWN_FUNCTION 0xFFFFFFFF > #define INTEL_SIP_SMC_STATUS_OK 0x0 > @@ -74,6 +80,7 @@ > #define INTEL_SIP_SMC_FPGA_CONFIG_STATUS_REJECTED 0x2 > #define INTEL_SIP_SMC_FPGA_CONFIG_STATUS_ERROR 0x4 > #define INTEL_SIP_SMC_REG_ERROR 0x5 > +#define INTEL_SIP_SMC_RSU_ERROR 0x7 > > /** > * Request INTEL_SIP_SMC_FPGA_CONFIG_START > @@ -262,4 +269,44 @@ INTEL_SIP_SMC_FAST_CALL_VAL(INTEL_SIP_SMC_FUNCID_FPGA_CONFIG_COMPLETED_WRITE) > #define INTEL_SIP_SMC_REG_UPDATE \ > INTEL_SIP_SMC_FAST_CALL_VAL(INTEL_SIP_SMC_FUNCID_REG_UPDATE) > > +/* > + * Request INTEL_SIP_SMC_RSU_STATUS > + * > + * Request remote status update boot log, call is synchronous. > + * > + * Call register usage: > + * a0 INTEL_SIP_SMC_RSU_STATUS > + * a1-7 not used > + * > + * Return status > + * a0: Current Image > + * a1: Last Failing Image > + * a2: Version | State > + * a3: Error details | Error location > + * > + * Or > + * > + * a0: INTEL_SIP_SMC_RSU_ERROR > + */ > +#define INTEL_SIP_SMC_FUNCID_RSU_STATUS 11 > +#define INTEL_SIP_SMC_RSU_STATUS \ > + INTEL_SIP_SMC_FAST_CALL_VAL(INTEL_SIP_SMC_FUNCID_RSU_STATUS) > + > +/* > + * Request INTEL_SIP_SMC_RSU_UPDATE > + * > + * Request to set the offset of the bitstream to boot after reboot, call > + * is synchronous. > + * > + * Call register usage: > + * a0 INTEL_SIP_SMC_RSU_UPDATE > + * a1 64bit physical address of the configuration data memory in flash > + * a2-7 not used > + * > + * Return status > + * a0 INTEL_SIP_SMC_STATUS_OK > + */ > +#define INTEL_SIP_SMC_FUNCID_RSU_UPDATE 12 > +#define INTEL_SIP_SMC_RSU_UPDATE \ > + INTEL_SIP_SMC_FAST_CALL_VAL(INTEL_SIP_SMC_FUNCID_RSU_UPDATE) > #endif > diff --git a/include/linux/firmware/intel/stratix10-svc-client.h b/include/linux/firmware/intel/stratix10-svc-client.h > index f2fda7e..e521f17 100644 > --- a/include/linux/firmware/intel/stratix10-svc-client.h > +++ b/include/linux/firmware/intel/stratix10-svc-client.h > @@ -10,8 +10,10 @@ > * Service layer driver supports client names > * > * fpga: for FPGA configuration > + * rsu: for remote status update > */ > #define SVC_CLIENT_FPGA "fpga" > +#define SVC_CLIENT_RSU "rsu" > > /** > * Status of the sent command, in bit number > @@ -36,6 +38,9 @@ > * > * SVC_COMMAND_STATUS_RECONFIG_ERROR: > * Error encountered during FPGA configuration. > + * > + * SVC_STATUS_RSU_OK: > + * Secure firmware accepts the request of remote status update (RSU). > */ > #define SVC_STATUS_RECONFIG_REQUEST_OK 0 > #define SVC_STATUS_RECONFIG_BUFFER_SUBMITTED 1 > @@ -43,7 +48,8 @@ > #define SVC_STATUS_RECONFIG_COMPLETED 3 > #define SVC_STATUS_RECONFIG_BUSY 4 > #define SVC_STATUS_RECONFIG_ERROR 5 > - > +#define SVC_STATUS_RSU_OK 6 > +#define SVC_STATUS_RSU_ERROR 7 > /** > * Flag bit for COMMAND_RECONFIG > * > @@ -56,9 +62,11 @@ > /** > * Timeout settings for service clients: > * timeout value used in Stratix10 FPGA manager driver. > + * timeout value used in RSU driver > */ > #define SVC_RECONFIG_REQUEST_TIMEOUT_MS 100 > #define SVC_RECONFIG_BUFFER_TIMEOUT_MS 240 > +#define SVC_RSU_REQUEST_TIMEOUT_MS 300 > > struct stratix10_svc_chan; > > @@ -81,13 +89,21 @@ struct stratix10_svc_chan; > * @COMMAND_RECONFIG_STATUS: check the status of the configuration, return > * status is SVC_STATUS_RECONFIG_COMPLETED, or SVC_STATUS_RECONFIG_BUSY, or > * SVC_STATUS_RECONFIG_ERROR > + * > + * @COMMAND_RSU_STATUS: request remote system update boot log, return status > + * is log data or SVC_STATUS_RSU_ERROR > + * > + * @COMMAND_RSU_UPDATE: set the offset of the bitstream to boot after reboot, > + * return status is SVC_STATUS_RSU_OK or SVC_STATUS_RSU_ERROR > */ > enum stratix10_svc_command_code { > COMMAND_NOOP = 0, > COMMAND_RECONFIG, > COMMAND_RECONFIG_DATA_SUBMIT, > COMMAND_RECONFIG_DATA_CLAIM, > - COMMAND_RECONFIG_STATUS > + COMMAND_RECONFIG_STATUS, > + COMMAND_RSU_STATUS, > + COMMAND_RSU_UPDATE > }; > > /** > -- > 2.7.4 > Thanks, Moritz