diff mbox series

[06/11] tpm: Add a basic API implementation for TPMv2

Message ID 20210116215138.1218256-6-sjg@chromium.org
State Superseded
Delegated to: Tom Rini
Headers show
Series tpm: Support using TPM1 and TPM2 from a single API | expand

Commit Message

Simon Glass Jan. 16, 2021, 9:51 p.m. UTC
Add support for TPMv2 versions of API functions. So far this is not
complete as the standard is quite large, but it implements everything
currently available for TPMv2 in U-Boot.

Signed-off-by: Simon Glass <sjg@chromium.org>
---

 lib/tpm_api.c | 84 ++++++++++++++++++++++++++++++++++++++++++++++-----
 1 file changed, 77 insertions(+), 7 deletions(-)
diff mbox series

Patch

diff --git a/lib/tpm_api.c b/lib/tpm_api.c
index 758350bd18d..f1553512cc5 100644
--- a/lib/tpm_api.c
+++ b/lib/tpm_api.c
@@ -16,18 +16,41 @@  static bool is_tpm1(struct udevice *dev)
 	return IS_ENABLED(CONFIG_TPM_V1) && tpm_get_version(dev) == TPM_V1;
 }
 
+static bool is_tpm2(struct udevice *dev)
+{
+	return IS_ENABLED(CONFIG_TPM_V2) && tpm_get_version(dev) == TPM_V2;
+}
+
 u32 tpm_startup(struct udevice *dev, enum tpm_startup_type mode)
 {
-	if (is_tpm1(dev))
+	if (is_tpm1(dev)) {
 		return tpm1_startup(dev, mode);
-	else
+	} else if (is_tpm2(dev)) {
+		enum tpm2_startup_types type;
+
+		switch (mode) {
+		case TPM_ST_CLEAR:
+			type = TPM2_SU_CLEAR;
+			break;
+		case TPM_ST_STATE:
+			type = TPM2_SU_STATE;
+			break;
+		default:
+		case TPM_ST_DEACTIVATED:
+			return -EINVAL;
+		}
+		return tpm2_startup(dev, type);
+	} else {
 		return -ENOSYS;
+	}
 }
 
 u32 tpm_resume(struct udevice *dev)
 {
 	if (is_tpm1(dev))
 		return tpm1_startup(dev, TPM_ST_STATE);
+	else if (is_tpm2(dev))
+		return tpm2_startup(dev, TPM2_SU_STATE);
 	else
 		return -ENOSYS;
 }
@@ -36,6 +59,8 @@  u32 tpm_self_test_full(struct udevice *dev)
 {
 	if (is_tpm1(dev))
 		return tpm1_self_test_full(dev);
+	else if (is_tpm2(dev))
+		return tpm2_self_test(dev, TPMI_YES);
 	else
 		return -ENOSYS;
 }
@@ -44,6 +69,8 @@  u32 tpm_continue_self_test(struct udevice *dev)
 {
 	if (is_tpm1(dev))
 		return tpm1_continue_self_test(dev);
+	else if (is_tpm2(dev))
+		return tpm2_self_test(dev, TPMI_NO);
 	else
 		return -ENOSYS;
 }
@@ -71,8 +98,6 @@  u32 tpm_clear_and_reenable(struct udevice *dev)
 			log_err("TPM: Can't set deactivated state\n");
 			return ret;
 		}
-	} else {
-		return -ENOSYS;
 	}
 
 	return TPM_SUCCESS;
@@ -82,6 +107,8 @@  u32 tpm_nv_enable_locking(struct udevice *dev)
 {
 	if (is_tpm1(dev))
 		return tpm1_nv_define_space(dev, TPM_NV_INDEX_LOCK, 0, 0);
+	else if (is_tpm2(dev))
+		return -ENOSYS;
 	else
 		return -ENOSYS;
 }
@@ -90,6 +117,8 @@  u32 tpm_nv_read_value(struct udevice *dev, u32 index, void *data, u32 count)
 {
 	if (is_tpm1(dev))
 		return tpm1_nv_read_value(dev, index, data, count);
+	else if (is_tpm2(dev))
+		return -ENOSYS;
 	else
 		return -ENOSYS;
 }
@@ -99,6 +128,8 @@  u32 tpm_nv_write_value(struct udevice *dev, u32 index, const void *data,
 {
 	if (is_tpm1(dev))
 		return tpm1_nv_write_value(dev, index, data, count);
+	else if (is_tpm2(dev))
+		return -ENOSYS;
 	else
 		return -ENOSYS;
 }
@@ -112,6 +143,8 @@  u32 tpm_write_lock(struct udevice *dev, u32 index)
 {
 	if (is_tpm1(dev))
 		return -ENOSYS;
+	else if (is_tpm2(dev))
+		return -ENOSYS;
 	else
 		return -ENOSYS;
 }
@@ -121,6 +154,9 @@  u32 tpm_pcr_extend(struct udevice *dev, u32 index, const void *in_digest,
 {
 	if (is_tpm1(dev))
 		return tpm1_extend(dev, index, in_digest, out_digest);
+	else if (is_tpm2(dev))
+		return tpm2_pcr_extend(dev, index, TPM2_ALG_SHA256, in_digest,
+				       TPM2_DIGEST_LEN);
 	else
 		return -ENOSYS;
 }
@@ -129,6 +165,8 @@  u32 tpm_pcr_read(struct udevice *dev, u32 index, void *data, size_t count)
 {
 	if (is_tpm1(dev))
 		return tpm1_pcr_read(dev, index, data, count);
+	else if (is_tpm2(dev))
+		return -ENOSYS;
 	else
 		return -ENOSYS;
 }
@@ -137,6 +175,13 @@  u32 tpm_tsc_physical_presence(struct udevice *dev, u16 presence)
 {
 	if (is_tpm1(dev))
 		return tpm1_tsc_physical_presence(dev, presence);
+
+	/*
+	 * Nothing to do on TPM2 for this; use platform hierarchy availability
+	 * instead.
+	 */
+	else if (is_tpm2(dev))
+		return 0;
 	else
 		return -ENOSYS;
 }
@@ -145,6 +190,10 @@  u32 tpm_finalise_physical_presence(struct udevice *dev)
 {
 	if (is_tpm1(dev))
 		return tpm1_finalise_physical_presence(dev);
+
+	/* Nothing needs to be done with tpm2 */
+	else if (is_tpm2(dev))
+		return 0;
 	else
 		return -ENOSYS;
 }
@@ -153,14 +202,18 @@  u32 tpm_read_pubek(struct udevice *dev, void *data, size_t count)
 {
 	if (is_tpm1(dev))
 		return tpm1_read_pubek(dev, data, count);
-	else
+	else if (is_tpm2(dev))
 		return -ENOSYS; /* not implemented yet */
+	else
+		return -ENOSYS;
 }
 
 u32 tpm_force_clear(struct udevice *dev)
 {
 	if (is_tpm1(dev))
 		return tpm1_force_clear(dev);
+	else if (is_tpm2(dev))
+		return tpm2_clear(dev, TPM2_RH_PLATFORM, NULL, 0);
 	else
 		return -ENOSYS;
 }
@@ -169,6 +222,10 @@  u32 tpm_physical_enable(struct udevice *dev)
 {
 	if (is_tpm1(dev))
 		return tpm1_physical_enable(dev);
+
+	/* Nothing needs to be done with tpm2 */
+	else if (is_tpm2(dev))
+		return 0;
 	else
 		return -ENOSYS;
 }
@@ -177,6 +234,10 @@  u32 tpm_physical_disable(struct udevice *dev)
 {
 	if (is_tpm1(dev))
 		return tpm1_physical_disable(dev);
+
+	/* Nothing needs to be done with tpm2 */
+	else if (is_tpm2(dev))
+		return 0;
 	else
 		return -ENOSYS;
 }
@@ -185,6 +246,9 @@  u32 tpm_physical_set_deactivated(struct udevice *dev, u8 state)
 {
 	if (is_tpm1(dev))
 		return tpm1_physical_set_deactivated(dev, state);
+	/* Nothing needs to be done with tpm2 */
+	else if (is_tpm2(dev))
+		return 0;
 	else
 		return -ENOSYS;
 }
@@ -194,6 +258,8 @@  u32 tpm_get_capability(struct udevice *dev, u32 cap_area, u32 sub_cap,
 {
 	if (is_tpm1(dev))
 		return tpm1_get_capability(dev, cap_area, sub_cap, cap, count);
+	else if (is_tpm2(dev))
+		return tpm2_get_capability(dev, cap_area, sub_cap, cap, count);
 	else
 		return -ENOSYS;
 }
@@ -202,14 +268,18 @@  u32 tpm_get_permissions(struct udevice *dev, u32 index, u32 *perm)
 {
 	if (is_tpm1(dev))
 		return tpm1_get_permissions(dev, index, perm);
-	else
+	else if (is_tpm2(dev))
 		return -ENOSYS; /* not implemented yet */
+	else
+		return -ENOSYS;
 }
 
 u32 tpm_get_random(struct udevice *dev, void *data, u32 count)
 {
 	if (is_tpm1(dev))
 		return tpm1_get_random(dev, data, count);
-	else
+	else if (is_tpm2(dev))
 		return -ENOSYS; /* not implemented yet */
+	else
+		return -ENOSYS;
 }