[PATCH v2 4/4] fpga: zynqmp: support loading authenticated images

[Oleksandr Suvorov]

Add supporting new compatible string "u-boot,zynqmp-fpga-ddrauth" to
handle loading authenticated images (DDR).

Based on solution by Jorge Ramirez-Ortiz <jorge at foundries.io>
Signed-off-by: Oleksandr Suvorov <oleksandr.suvorov at foundries.io>
Co-developed-by: Ricardo Salveti <ricardo at foundries.io>
Signed-off-by: Ricardo Salveti <ricardo at foundries.io>
Tested-by: Ricardo Salveti <ricardo at foundries.io>
---

Changes in v2:
- add function fit_fpga_load() to simplify calls of fpga_load()
  from contexts without a compatible attribute.
- move all ZynqMP-specific logic to drivers/fpga/zynqmppl.c
- prepare for passing a "compatible" FDT property to any fpga driver.

 drivers/fpga/zynqmppl.c | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/drivers/fpga/zynqmppl.c b/drivers/fpga/zynqmppl.c
index 8ff12bf50a..ce25381890 100644
--- a/drivers/fpga/zynqmppl.c
+++ b/drivers/fpga/zynqmppl.c
@@ -9,6 +9,7 @@
 #include <common.h>
 #include <compiler.h>
 #include <cpu_func.h>
+#include <fpga.h>
 #include <log.h>
 #include <zynqmppl.h>
 #include <zynqmp_firmware.h>
@@ -209,6 +210,26 @@ static int zynqmp_load(xilinx_desc *desc, const void *buf, size_t bsize,
 	u32 buf_lo, buf_hi;
 	u32 ret_payload[PAYLOAD_ARG_CNT];
 	bool xilfpga_old = false;
+	fpga_desc *fdesc = container_of((void *)desc, fpga_desc, devdesc);
+
+	if (fdesc && fdesc->compatible &&
+	    !strcmp(fdesc->compatible, "u-boot,zynqmp-fpga-ddrauth")) {
+#if CONFIG_IS_ENABLED(FPGA_LOAD_SECURE)
+		struct fpga_secure_info info = { 0 };
+
+		if (!desc->operations->loads) {
+			printf("%s: Missing load operation\n", __func__);
+			return FPGA_FAIL;
+		}
+		/* DDR authentication */
+		info.authflag = 1;
+		info.encflag = 2;
+		return desc->operations->loads(desc, buf, bsize, &info);
+#else
+		printf("No support for %s\n", fdesc->compatible);
+		return FPGA_FAIL;
+#endif
+	}
 
 	if (zynqmp_firmware_version() <= PMUFW_V1_0) {
 		puts("WARN: PMUFW v1.0 or less is detected\n");
-- 
2.31.1