firmware: stratix10-svc: Add support for FCS

Extend Intel service layer driver to support FPGA Crypto service(FCS)
features on Intel Soc platforms. Adding an additional channel and FCS
platform driver ("intel_fcs") as part of the probe method.
FCS driver uses the driver to send crypto operations' commands to
the secure device manager(SDM) on Intel Soc platforms Stratix10 and
Agilex.

Signed-off-by: Ang Tien Sung <tien.sung.ang@intel.com>
Signed-off-by: Dinh Nguyen <dinguyen@kernel.org>
Link: https://lore.kernel.org/r/20220711223140.2307945-1-dinguyen@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/firmware/stratix10-svc.c b/drivers/firmware/stratix10-svc.c
index 14663f6..1fe748c 100644 (file)
--- a/drivers/firmware/stratix10-svc.c
+++ b/drivers/firmware/stratix10-svc.c
@@ -34,12 +34,13 @@
  * timeout is set to 30 seconds (30 * 1000) at Intel Stratix10 SoC.
  */
 #define SVC_NUM_DATA_IN_FIFO                   32
-#define SVC_NUM_CHANNEL                                2
+#define SVC_NUM_CHANNEL                                3
 #define FPGA_CONFIG_DATA_CLAIM_TIMEOUT_MS      200
 #define FPGA_CONFIG_STATUS_TIMEOUT_SEC         30
 
 /* stratix10 service layer clients */
 #define STRATIX10_RSU                          "stratix10-rsu"
+#define INTEL_FCS                              "intel-fcs"
 
 typedef void (svc_invoke_fn)(unsigned long, unsigned long, unsigned long,
                             unsigned long, unsigned long, unsigned long,
@@ -53,6 +54,7 @@ struct stratix10_svc_chan;
  */
 struct stratix10_svc {
        struct platform_device *stratix10_svc_rsu;
+       struct platform_device *intel_svc_fcs;
 };
 
 /**
@@ -1036,6 +1038,11 @@ static int stratix10_svc_drv_probe(struct platform_device *pdev)
        chans[1].name = SVC_CLIENT_RSU;
        spin_lock_init(&chans[1].lock);
 
+       chans[2].scl = NULL;
+       chans[2].ctrl = controller;
+       chans[2].name = SVC_CLIENT_FCS;
+       spin_lock_init(&chans[2].lock);
+
        list_add_tail(&controller->node, &svc_ctrl);
        platform_set_drvdata(pdev, controller);
 
@@ -1054,8 +1061,22 @@ static int stratix10_svc_drv_probe(struct platform_device *pdev)
        }
 
        ret = platform_device_add(svc->stratix10_svc_rsu);
-       if (ret)
-               goto err_put_device;
+       if (ret) {
+               platform_device_put(svc->stratix10_svc_rsu);
+               return ret;
+       }
+
+       svc->intel_svc_fcs = platform_device_alloc(INTEL_FCS, 1);
+       if (!svc->intel_svc_fcs) {
+               dev_err(dev, "failed to allocate %s device\n", INTEL_FCS);
+               return -ENOMEM;
+       }
+
+       ret = platform_device_add(svc->intel_svc_fcs);
+       if (ret) {
+               platform_device_put(svc->intel_svc_fcs);
+               return ret;
+       }
 
        dev_set_drvdata(dev, svc);
 
@@ -1063,8 +1084,6 @@ static int stratix10_svc_drv_probe(struct platform_device *pdev)
 
        return 0;
 
-err_put_device:
-       platform_device_put(svc->stratix10_svc_rsu);
 err_free_kfifo:
        kfifo_free(&controller->svc_fifo);
        return ret;
@@ -1075,6 +1094,7 @@ static int stratix10_svc_drv_remove(struct platform_device *pdev)
        struct stratix10_svc *svc = dev_get_drvdata(&pdev->dev);
        struct stratix10_svc_controller *ctrl = platform_get_drvdata(pdev);
 
+       platform_device_unregister(svc->intel_svc_fcs);
        platform_device_unregister(svc->stratix10_svc_rsu);
 
        kfifo_free(&ctrl->svc_fifo);

diff --git a/include/linux/firmware/intel/stratix10-svc-client.h b/include/linux/firmware/intel/stratix10-svc-client.h
index 18c1841..24121f8 100644 (file)
--- a/include/linux/firmware/intel/stratix10-svc-client.h
+++ b/include/linux/firmware/intel/stratix10-svc-client.h
@@ -14,6 +14,7 @@
  */
 #define SVC_CLIENT_FPGA                        "fpga"
 #define SVC_CLIENT_RSU                 "rsu"
+#define SVC_CLIENT_FCS                 "fcs"
 
 /*
  * Status of the sent command, in bit number