libstb/tss: build TSS and tpmLogMgr

This adds both TSS and tpmLogMgr to be built as part of libstb.

We map some routines and types from TSS and tpmLogMgr codes
to equivalent skiboot routines and types.

Signed-off-by: Claudio Carvalho <cclaudio@linux.vnet.ibm.com>
[stewart@linux.vnet.ibm.com: merge skiboot/HB mappings into makefile patch,
and fix pointer to int without cast warning (NULL vs 0) ]
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>

7 files changed, 164 insertions, 7 deletions

diff --git a/libstb/Makefile.inc b/libstb/Makefile.inc
index b4463cf..cb6c30e 100644
--- a/libstb/Makefile.inc
+++ b/libstb/Makefile.inc
@@ -9,5 +9,6 @@ LIBSTB_OBJS = $(LIBSTB_SRCS:%.c=%.o)
 LIBSTB = $(LIBSTB_DIR)/built-in.o
 
 include $(SRC)/$(LIBSTB_DIR)/drivers/Makefile.inc
+include $(SRC)/$(LIBSTB_DIR)/tss/Makefile.inc
 
-$(LIBSTB): $(LIBSTB_OBJS:%=$(LIBSTB_DIR)/%) $(DRIVERS)
+$(LIBSTB): $(LIBSTB_OBJS:%=$(LIBSTB_DIR)/%) $(DRIVERS) $(TSS)
diff --git a/libstb/tpm_chip.c b/libstb/tpm_chip.c
index ee297c2..91efa3a 100644
--- a/libstb/tpm_chip.c
+++ b/libstb/tpm_chip.c
@@ -28,7 +28,9 @@ static struct list_head tpm_list = LIST_HEAD_INIT(tpm_list);
 int tpm_register_chip(struct dt_node *node, struct tpm_dev *dev,
 		       struct tpm_driver *driver)
 {
-	int i;
+	int i, rc;
+	uint64_t sml_base;
+	uint32_t sml_size;
 	struct tpm_chip *tpm;
 
 	i = 0;
@@ -51,6 +53,63 @@ int tpm_register_chip(struct dt_node *node, struct tpm_dev *dev,
 	assert(tpm);
 	tpm->id = i;
 
+	/*
+	 * Read event log info from the tpm device tree node. Both
+	 * linux,sml-base and linux,sml-size properties are documented in
+	 * 'doc/device-tree/tpm.rst'
+	 */
+
+	sml_base = dt_prop_get_u64_def(node, "linux,sml-base", 0);
+
+	/* Check if sml-base is really 0 or it just doesn't exist */
+	if (!sml_base &&
+	    !dt_find_property(node, "linux,sml-base")) {
+		/**
+		 * @fwts-label TPMSmlBaseNotFound
+		 * @fwts-advice linux,sml-base property not found. This
+		 * indicates a Hostboot bug if the property really
+		 * doesn't exist in the tpm node.
+		 */
+		prlog(PR_ERR, "TPM: linux,sml-base property not found "
+		      "tpm node %p\n", node);
+		goto disable;
+	}
+
+	sml_size = dt_prop_get_u32_def(node, "linux,sml-size", 0);
+
+	if (!sml_size) {
+		/**
+		 * @fwts-label TPMSmlSizeNotFound
+		 * @fwts-advice linux,sml-size property not found. This
+		 * indicates a Hostboot bug if the property really
+		 * doesn't exist in the tpm node.
+		 */
+		prlog(PR_ERR, "TPM: linux,sml-size property not found, "
+		      "tpm node %p\n", node);
+		goto disable;
+	}
+
+	/*
+	 * Initialize the event log manager by walking through the log to identify
+	 * what is the next free position in the log
+	 */
+	rc = TpmLogMgr_initializeUsingExistingLog(&tpm->logmgr,
+					 (uint8_t*) sml_base, sml_size);
+
+	if (rc) {
+		/**
+		 * @fwts-label TPMInitEventLogFailed
+		 * @fwts-advice Hostboot creates and adds entries to the
+		 * event log. The failed init function is part of hostboot,
+		 * but the source code is shared with skiboot. If the hostboot
+		 * TpmLogMgr code (or friends) has been updated, the changes
+		 * need to be applied to skiboot as well.
+		 */
+		prlog(PR_ERR, "TPM: eventlog init failed: tpm%d rc=%d",
+		      tpm->id, rc);
+		goto disable;
+	}
+
 	tpm->enabled = true;
 	tpm->node = node;
 	tpm->dev = dev;
@@ -58,10 +117,16 @@ int tpm_register_chip(struct dt_node *node, struct tpm_dev *dev,
 
 	list_add_tail(&tpm_list, &tpm->link);
 
-	prlog(PR_NOTICE, "TPM: tpm%d registered: driver=%s\n",
-	      tpm->id, tpm->driver->name);
+	prlog(PR_NOTICE, "TPM: tpm%d registered: driver=%s felsz=%d\n",
+	      tpm->id, tpm->driver->name, tpm->logmgr.logSize);
 
 	return 0;
+
+disable:
+	dt_add_property_string(node, "status", "disabled");
+	prlog(PR_NOTICE, "TPM: tpm node %p disabled\n", node);
+	free(tpm);
+	return STB_ERROR;
 }
 
 void tpm_init(void)
diff --git a/libstb/tpm_chip.h b/libstb/tpm_chip.h
index ca30e3b..b8f536c 100644
--- a/libstb/tpm_chip.h
+++ b/libstb/tpm_chip.h
@@ -19,6 +19,8 @@
 
 #include <device.h>
 
+#include "tss/tpmLogMgr.H"
+
 struct tpm_dev {
 
 	/* TPM bus id */
@@ -49,6 +51,9 @@ struct tpm_chip {
 	/* TPM device tree node */
 	struct dt_node *node;
 
+	/* Event log handler */
+	struct _TpmLogMgr logmgr;
+
 	/* TPM device handler */
 	struct tpm_dev    *dev;
 
@@ -63,6 +68,7 @@ typedef struct tpm_chip TpmTarget;
 
 /*
  * Register a tpm chip by binding the driver to dev.
+ * Event log is also registered by this function.
  */
 extern int tpm_register_chip(struct dt_node *node, struct tpm_dev *dev,
 			     struct tpm_driver *driver);
diff --git a/libstb/tss/Makefile.inc b/libstb/tss/Makefile.inc
new file mode 100644
index 0000000..2b5c3b9
--- /dev/null
+++ b/libstb/tss/Makefile.inc
@@ -0,0 +1,13 @@
+#-*-Makefile-*-
+
+TSS_DIR = libstb/tss
+
+SUBDIRS += $(TSS_DIR)
+
+TSS_SRCS = trustedbootCmds.C trustedTypes.C trustedbootUtils.C \
+	   tpmLogMgr.C
+TSS_OBJS = $(TSS_SRCS:%.C=%.o)
+TSS = $(TSS_DIR)/built-in.o
+
+$(TSS): $(TSS_OBJS:%=$(TSS_DIR)/%)
+
diff --git a/libstb/tss/trustedboot.H b/libstb/tss/trustedboot.H
new file mode 100644
index 0000000..dccee1a
--- /dev/null
+++ b/libstb/tss/trustedboot.H
@@ -0,0 +1,72 @@
+ /* Copyright 2013-2016 IBM Corp.
+  *
+  * Licensed under the Apache License, Version 2.0 (the "License");
+  * you may not use this file except in compliance with the License.
+  * You may obtain a copy of the License at
+  *
+  *      http://www.apache.org/licenses/LICENSE-2.0
+  *
+  * Unless required by applicable law or agreed to in writing, software
+  * distributed under the License is distributed on an "AS IS" BASIS,
+  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+  * implied.
+  * See the License for the specific language governing permissions and
+  * limitations under the License.
+  */
+
+/***************************************************************
+ * This file maps some routines and types from TSS and tpmLogMgr
+ * codes to equivalent routines and types in skiboot.
+ ***************************************************************/
+
+#ifndef __TRUSTEDBOOT_H
+#define __TRUSTEDBOOT_H
+
+#include <skiboot.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <lock.h>
+
+/* Failure trace routines */
+#define TRACFCOMP(TB, fmt, ...) prlog(PR_ERR, "TSS: " fmt "\n", ##__VA_ARGS__);
+//#define TRACFCOMP(args...)
+
+/* Debug trace routines */
+//#define TRACDCOMP(TB, fmt, ...) prlog(PR_DEBUG, "TSS: " fmt "\n", ##__VA_ARGS__)
+#define TRACDCOMP(args...)
+
+//#define TRACUCOMP(TB, fmt, ...) prlog(PR_DEBUG, "TSS: " fmt "\n", ##__VA_ARGS__);
+#define TRACUCOMP(args...)
+
+//#define TRACUBIN(TB, fmt, ...) prlog(PR_DEBUG, "TSS: " fmt "\n", ##__VA_ARGS__);
+#define TRACUBIN(args...)
+
+#define g_trac_trustedboot NULL
+#define g_trac_tpmdd NULL
+typedef uint32_t errlHndl_t;
+#define TB_SUCCESS 0
+#define htole32(val) cpu_to_le32(val)
+#define le32toh(val) le32_to_cpu(val)
+#define le16toh(val) le16_to_cpu(val)
+#define htole16(val) cpu_to_le16(val)
+
+#define mutex_init(mutex) init_lock(mutex)
+#define mutex_lock(mutex) lock(mutex)
+#define mutex_unlock(mutex) unlock(mutex)
+#define mutex_t struct lock
+
+typedef enum {
+    PCR_0 = 0,
+    PCR_1 = 1,
+    PCR_2 = 2,
+    PCR_3 = 3,
+    PCR_4 = 4,
+    PCR_5 = 5,
+    PCR_6 = 6,
+    PCR_7 = 7,
+    /* As defined in the TCG PC Client Platform TPM Profile (PTP)
+     * Specification, Revision 00.43. (TPM_PT_PCR_COUNT) */
+    IMPLEMENTATION_PCR = 24
+} TPM_Pcr;
+
+#endif
diff --git a/libstb/tss/trustedbootCmds.C b/libstb/tss/trustedbootCmds.C
index f454aca..c924806 100644
--- a/libstb/tss/trustedbootCmds.C
+++ b/libstb/tss/trustedbootCmds.C
@@ -739,7 +739,7 @@ errlHndl_t tpmCmdPcrExtend2Hash(TpmTarget * io_target,
                                 const uint8_t* i_digest_2,
                                 size_t  i_digestSize_2)
 {
-    errlHndl_t err = NULL;
+    errlHndl_t err = 0;
     uint8_t dataBuf[sizeof(TPM2_ExtendIn)];
     size_t dataSize = sizeof(dataBuf);
     size_t fullDigestSize_1 = 0;
@@ -882,7 +882,7 @@ errlHndl_t tpmCmdPcrRead(TpmTarget* io_target,
                          uint8_t* o_digest,
                          size_t  i_digestSize)
 {
-    errlHndl_t err = NULL;
+    errlHndl_t err = 0;
     uint8_t dataBuf[sizeof(TPM2_PcrReadOut)];
     size_t dataSize = sizeof(dataBuf);
     size_t fullDigestSize = 0;
diff --git a/libstb/tss/trustedbootUtils.C b/libstb/tss/trustedbootUtils.C
index ba6667f..9e6891c 100644
--- a/libstb/tss/trustedbootUtils.C
+++ b/libstb/tss/trustedbootUtils.C
@@ -22,7 +22,7 @@
 errlHndl_t tpmTransmit(TpmTarget * io_target, uint8_t* io_buffer,
 		       size_t i_cmdSize, size_t i_bufsize )
 {
-	errlHndl_t err = NULL;
+	errlHndl_t err = 0;
 	err = io_target->driver->transmit(io_target->dev,
                                           io_buffer,
                                           i_cmdSize,