Add support for the Peripheral Authentication Service SMC interface.

These are used to authenticate and boot firmware images on the many
coprocessors embedded in Qualcomm SoCs.

ok kettenis@

diff --git a/sys/dev/fdt/qcscm.c b/sys/dev/fdt/qcscm.c
index 4c59086..c5d2daa 100644 (file)
--- a/sys/dev/fdt/qcscm.c
+++ b/sys/dev/fdt/qcscm.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: qcscm.c,v 1.3 2023/04/28 10:19:07 patrick Exp $ */
+/* $OpenBSD: qcscm.c,v 1.4 2023/05/17 23:12:04 patrick Exp $ */
 /*
  * Copyright (c) 2022 Patrick Wildt <patrick@blueri.se>
  *
@@ -43,6 +43,7 @@
 #define ARM_SMCCC_STD_CALL                     (0U << 31)
 #define ARM_SMCCC_FAST_CALL                    (1U << 31)
 #define ARM_SMCCC_LP64                         (1U << 30)
+#define ARM_SMCCC_OWNER_SIP                    2
 
 #define QCTEE_TZ_OWNER_TZ_APPS                 48
 #define QCTEE_TZ_OWNER_QSEE_OS                 50
@@ -68,6 +69,14 @@
 #define QCTEE_UEFI_DEVICE_ERROR                        0x80000007
 #define QCTEE_UEFI_NOT_FOUND                   0x8000000e
 
+#define QCSCM_SVC_PIL                  0x02
+#define QCSCM_PIL_PAS_INIT_IMAGE       0x01
+#define QCSCM_PIL_PAS_MEM_SETUP                0x02
+#define QCSCM_PIL_PAS_AUTH_AND_RESET   0x05
+#define QCSCM_PIL_PAS_SHUTDOWN         0x06
+#define QCSCM_PIL_PAS_IS_SUPPORTED     0x07
+#define QCSCM_PIL_PAS_MSS_RESET                0x0a
+
 #define QCSCM_INTERRUPTED              1
 
 #define QCSCM_ARGINFO_NUM(x)           (((x) & 0xf) << 0)
@@ -730,6 +739,93 @@ qcscm_uefi_rtc_set(uint32_t off)
        return 0;
 }
 
+int
+qcscm_pas_init_image(uint32_t peripheral, paddr_t metadata)
+{
+       struct qcscm_softc *sc = qcscm_sc;
+       uint64_t res[3];
+       uint64_t args[2];
+       uint32_t arginfo;
+       int ret;
+
+       if (sc == NULL)
+               return ENXIO;
+
+       arginfo = QCSCM_ARGINFO_NUM(nitems(args));
+       arginfo |= QCSCM_ARGINFO_TYPE(0, QCSCM_ARGINFO_TYPE_VAL);
+       arginfo |= QCSCM_ARGINFO_TYPE(1, QCSCM_ARGINFO_TYPE_RW);
+       args[0] = peripheral;
+       args[1] = metadata;
+
+       /* Make call into TEE */
+       ret = qcscm_smc_call(sc, ARM_SMCCC_OWNER_SIP, QCSCM_SVC_PIL,
+           QCSCM_PIL_PAS_INIT_IMAGE, arginfo, args, nitems(args), res);
+
+       /* If the call succeeded, check the response status */
+       if (ret == 0)
+               ret = res[0];
+
+       return ret;
+}
+
+int
+qcscm_pas_mem_setup(uint32_t peripheral, paddr_t addr, size_t size)
+{
+       struct qcscm_softc *sc = qcscm_sc;
+       uint64_t res[3];
+       uint64_t args[3];
+       uint32_t arginfo;
+       int ret;
+
+       if (sc == NULL)
+               return ENXIO;
+
+       arginfo = QCSCM_ARGINFO_NUM(nitems(args));
+       arginfo |= QCSCM_ARGINFO_TYPE(0, QCSCM_ARGINFO_TYPE_VAL);
+       arginfo |= QCSCM_ARGINFO_TYPE(1, QCSCM_ARGINFO_TYPE_VAL);
+       arginfo |= QCSCM_ARGINFO_TYPE(2, QCSCM_ARGINFO_TYPE_VAL);
+       args[0] = peripheral;
+       args[1] = addr;
+       args[2] = size;
+
+       /* Make call into TEE */
+       ret = qcscm_smc_call(sc, ARM_SMCCC_OWNER_SIP, QCSCM_SVC_PIL,
+           QCSCM_PIL_PAS_MEM_SETUP, arginfo, args, nitems(args), res);
+
+       /* If the call succeeded, check the response status */
+       if (ret == 0)
+               ret = res[0];
+
+       return ret;
+}
+
+int
+qcscm_pas_auth_and_reset(uint32_t peripheral)
+{
+       struct qcscm_softc *sc = qcscm_sc;
+       uint64_t res[3];
+       uint64_t args[1];
+       uint32_t arginfo;
+       int ret;
+
+       if (sc == NULL)
+               return ENXIO;
+
+       arginfo = QCSCM_ARGINFO_NUM(nitems(args));
+       arginfo |= QCSCM_ARGINFO_TYPE(0, QCSCM_ARGINFO_TYPE_VAL);
+       args[0] = peripheral;
+
+       /* Make call into TEE */
+       ret = qcscm_smc_call(sc, ARM_SMCCC_OWNER_SIP, QCSCM_SVC_PIL,
+           QCSCM_PIL_PAS_AUTH_AND_RESET, arginfo, args, nitems(args), res);
+
+       /* If the call succeeded, check the response status */
+       if (ret == 0)
+               ret = res[0];
+
+       return ret;
+}
+
 /* DMA code */
 struct qcscm_dmamem *
 qcscm_dmamem_alloc(struct qcscm_softc *sc, bus_size_t size, bus_size_t align)