aboutsummaryrefslogtreecommitdiff
path: root/sys/dev/tpm/tpm20.h
diff options
context:
space:
mode:
Diffstat (limited to 'sys/dev/tpm/tpm20.h')
-rw-r--r--sys/dev/tpm/tpm20.h192
1 files changed, 192 insertions, 0 deletions
diff --git a/sys/dev/tpm/tpm20.h b/sys/dev/tpm/tpm20.h
new file mode 100644
index 000000000000..38340c33f76a
--- /dev/null
+++ b/sys/dev/tpm/tpm20.h
@@ -0,0 +1,192 @@
+/*-
+ * Copyright (c) 2018 Stormshield.
+ * Copyright (c) 2018 Semihalf.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef _TPM20_H_
+#define _TPM20_H_
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/endian.h>
+#include <sys/param.h>
+#include <sys/kernel.h>
+#include <sys/malloc.h>
+#include <sys/proc.h>
+#include <sys/systm.h>
+
+#include <sys/bus.h>
+#include <sys/callout.h>
+#include <sys/conf.h>
+#include <sys/module.h>
+#include <sys/rman.h>
+#include <sys/sx.h>
+#include <sys/uio.h>
+
+#include <machine/bus.h>
+#include <machine/md_var.h>
+#include <machine/resource.h>
+
+#include <contrib/dev/acpica/include/acpi.h>
+#include <contrib/dev/acpica/include/accommon.h>
+#include <dev/acpica/acpivar.h>
+#include "opt_acpi.h"
+
+#define BIT(x) (1 << (x))
+
+/* Timeouts in us */
+#define TPM_TIMEOUT_A 750000
+#define TPM_TIMEOUT_B 2000000
+#define TPM_TIMEOUT_C 200000
+#define TPM_TIMEOUT_D 30000
+
+/*
+ * Generating RSA key pair takes ~(10-20s), which is significantly longer than
+ * any timeout defined in spec. Because of that we need a new one.
+ */
+#define TPM_TIMEOUT_LONG 40000000
+
+/* List of commands that require TPM_TIMEOUT_LONG time to complete */
+#define TPM_CC_CreatePrimary 0x00000131
+#define TPM_CC_Create 0x00000153
+#define TPM_CC_CreateLoaded 0x00000191
+
+/* List of commands that require only TPM_TIMEOUT_C time to complete */
+#define TPM_CC_SequenceComplete 0x0000013e
+#define TPM_CC_Startup 0x00000144
+#define TPM_CC_SequenceUpdate 0x0000015c
+#define TPM_CC_GetCapability 0x0000017a
+#define TPM_CC_PCR_Extend 0x00000182
+#define TPM_CC_EventSequenceComplete 0x00000185
+#define TPM_CC_HashSequenceStart 0x00000186
+
+/* Timeout before data in read buffer is discarded */
+#define TPM_READ_TIMEOUT 500000
+
+#define TPM_BUFSIZE 0x1000
+
+#define TPM_HEADER_SIZE 10
+
+#define TPM_CDEV_NAME "tpm0"
+#define TPM_CDEV_PERM_FLAG 0600
+
+struct tpm_sc {
+ device_t dev;
+
+ struct resource *mem_res;
+ struct resource *irq_res;
+ int mem_rid;
+ int irq_rid;
+
+ struct cdev *sc_cdev;
+
+ struct sx dev_lock;
+ struct cv buf_cv;
+
+ void *intr_cookie;
+ int intr_type; /* Current event type */
+ bool interrupts;
+
+ uint8_t *buf;
+ size_t pending_data_length;
+
+ struct callout discard_buffer_callout;
+
+ int (*transmit)(struct tpm_sc *, size_t);
+};
+
+int tpm20_suspend(device_t dev);
+int tpm20_shutdown(device_t dev);
+int32_t tpm20_get_timeout(uint32_t command);
+int tpm20_init(struct tpm_sc *sc);
+void tpm20_release(struct tpm_sc *sc);
+
+d_open_t tpm20_open;
+d_close_t tpm20_close;
+d_read_t tpm20_read;
+d_write_t tpm20_write;
+d_ioctl_t tpm20_ioctl;
+
+static struct cdevsw tpm_cdevsw = {
+ .d_version = D_VERSION,
+ .d_open = tpm20_open,
+ .d_close = tpm20_close,
+ .d_read = tpm20_read,
+ .d_write = tpm20_write,
+ .d_ioctl = tpm20_ioctl,
+ .d_name = "tpm20",
+};
+
+/* Small helper routines for io ops */
+static inline uint8_t
+RD1(struct tpm_sc *sc, bus_size_t off)
+{
+
+ return (bus_read_1(sc->mem_res, off));
+}
+static inline uint32_t
+RD4(struct tpm_sc *sc, bus_size_t off)
+{
+
+ return (bus_read_4(sc->mem_res, off));
+}
+static inline uint64_t
+RD8(struct tpm_sc *sc, bus_size_t off)
+{
+
+ return (bus_read_8(sc->mem_res, off));
+}
+static inline void
+WR1(struct tpm_sc *sc, bus_size_t off, uint8_t val)
+{
+
+ bus_write_1(sc->mem_res, off, val);
+}
+static inline void
+WR4(struct tpm_sc *sc, bus_size_t off, uint32_t val)
+{
+
+ bus_write_4(sc->mem_res, off, val);
+}
+static inline void
+AND4(struct tpm_sc *sc, bus_size_t off, uint32_t val)
+{
+
+ WR4(sc, off, RD4(sc, off) & val);
+}
+static inline void
+OR1(struct tpm_sc *sc, bus_size_t off, uint8_t val)
+{
+
+ WR1(sc, off, RD1(sc, off) | val);
+}
+static inline void
+OR4(struct tpm_sc *sc, bus_size_t off, uint32_t val)
+{
+
+ WR4(sc, off, RD4(sc, off) | val);
+}
+#endif /* _TPM20_H_ */