AMD DRTM: Add drivier for AMD's PSP to facilitate DRTM

Add a driver to communicate with AMD's PSP. Add functions to perform the
following tasks in the DRTM sequence:
- Get Capability
- Launch
- Extend OSSL digest

In addition, it adds miscellaneous functions to discover the PSP, issue
commands to it, and process response.

Signed-off-by: Jagannathan Raman <[email protected]>

Author: jraman567

include/pci.h

@@ -25,6 +25,10 @@
 #define PCI_CONFIG_ADDR_PORT    (0x0cf8)
 #define PCI_CONFIG_DATA_PORT    (0x0cfc)
 
+#define PCI_BUSMAX              255
+#define PCI_SLOTMAX             32
+#define PCI_FUNCMAX             8
+
 #define PCI_CAPABILITY_LIST     0x34    /* Offset of first capability list entry */
 
 /* PCI capability ID for IOMMU and SVM DEV - AMD Manual */

include/psp.h

@@ -0,0 +1,96 @@
+/*
+ * Copyright (c) 2022, Oracle and/or its affiliates.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ *   * Redistributions of source code must retain the above copyright
+ *     notice, this list of conditions and the following disclaimer.
+ *   * 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.
+ *   * Neither the name of the Intel Corporation nor the names of its
+ *     contributors may be used to endorse or promote products derived
+ *     from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "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
+ * COPYRIGHT OWNER OR CONTRIBUTORS 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 __SKINIT_PSP_H__
+#define __SKINIT_PSP_H__
+
+#ifdef AMDSL
+
+#include <stdbool.h>
+
+#define	DRTM_MBOX_READY_MASK		0x80000000
+#define	DRTM_MBOX_TMR_INDEX_ID_MASK	0x0F000000
+#define	DRTM_MBOX_CMD_MASK		0x00FF0000
+#define	DRTM_MBOX_STATUS_MASK		0x0000FFFF
+
+#define	DRTM_MBOX_CMD_SHIFT		16
+
+#define	DRTM_NO_ERROR			0x00000000
+#define	DRTM_NOT_SUPPORTED		0x00000001
+#define	DRTM_LAUNCH_ERROR		0x00000002
+#define	DRTM_TMR_SETUP_FAILED_ERROR	0x00000003
+#define	DRTM_TMR_DESTROY_FAILED_ERROR	0x00000004
+#define	DRTM_GET_TCG_LOGS_FAILED_ERROR	0x00000007
+#define	DRTM_OUT_OF_RESOURCES_ERROR	0x00000008
+#define	DRTM_GENERIC_ERROR		0x00000009
+#define	DRTM_INVALID_SERVICE_ID_ERROR	0x0000000A
+#define	DRTM_MEMORY_UNALIGNED_ERROR	0x0000000B
+#define	DRTM_MINIMUM_SIZE_ERROR		0x0000000C
+#define	DRTM_GET_TMR_DESCRIPTOR_FAILED	0x0000000D
+#define	DRTM_EXTEND_OSSL_DIGEST_FAILED	0x0000000E
+#define	DRTM_SETUP_NOT_ALLOWED		0x0000000F
+#define	DRTM_GET_IVRS_TABLE_FAILED	0x00000010
+
+#define DRTM_CMD_GET_CAPABILITY		0x1
+#define	DRTM_CMD_TMR_SETUP		0x2
+#define	DRTM_CMD_TMR_RELEASE		0x3
+#define	DRTM_CMD_LAUNCH			0x4
+#define	DRTM_CMD_GET_TCG_LOGS		0x7
+#define	DRTM_CMD_TPM_LOCALITY_ACCESS	0x8
+#define	DRTM_CMD_GET_TMR_DESCRIPTORS	0x9
+#define	DRTM_CMD_ALLOCATE_SHARED_MEMORY	0xA
+#define	DRTM_CMD_EXTEND_OSSL_DIGEST	0xB
+#define	DRTM_CMD_GET_IVRS_TABLE_INFO	0xC
+
+#define DRTM_TMR_INDEX_0		0
+#define DRTM_TMR_INDEX_1		1
+#define DRTM_TMR_INDEX_2		2
+#define DRTM_TMR_INDEX_3		3
+#define DRTM_TMR_INDEX_4		4
+#define DRTM_TMR_INDEX_5		5
+#define DRTM_TMR_INDEX_6		6
+#define DRTM_TMR_INDEX_7		7
+
+#define	DRTM_CMD_READY			0
+#define	DRTM_RESPONSE_READY		1
+
+bool discover_psp(void);
+
+bool drtm_extend_ossl_digest(u64 addr, u64 size);
+
+bool drtm_launch(void);
+
+bool drtm_get_cap(void);
+
+#endif /* AMDSL */
+
+#endif /* __SKINIT_PSP_H__ */