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Date: Tue, 6 Nov 2018 09:22:02 -0800
From: Moritz Fischer <mdf@...nel.org>
To: richard.gong@...ux.intel.com
Cc: gregkh@...uxfoundation.org, catalin.marinas@....com,
will.deacon@....com, dinguyen@...nel.org, robh+dt@...nel.org,
mark.rutland@....com, atull@...nel.org, mdf@...nel.org,
arnd@...db.de, corbet@....net,
linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
devicetree@...r.kernel.org, linux-fpga@...r.kernel.org,
linux-doc@...r.kernel.org, todd.riffel@...el.com,
richard.gong@...el.com
Subject: Re: [PATCHv10 8/8] firmware: add remote status update client support
Hi Richard,
On Tue, Nov 06, 2018 at 10:52:52AM -0600, richard.gong@...ux.intel.com wrote:
> From: Richard Gong <richard.gong@...el.com>
>
> 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 <richard.gong@...el.com>
> Signed-off-by: Alan Tull <atull@...nel.org>
> ---
> 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
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