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/*
* CXL CDAT Structure
*
* Copyright (C) 2021 Avery Design Systems, Inc.
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*/
#ifndef CXL_CDAT_H
#define CXL_CDAT_H
#include "hw/cxl/cxl_pci.h"
#include "hw/pci/pcie_doe.h"
/*
* Reference:
* Coherent Device Attribute Table (CDAT) Specification, Rev. 1.03, July. 2022
* Compute Express Link (CXL) Specification, Rev. 3.1, Aug. 2023
*/
/* Table Access DOE - CXL r3.1 8.1.11 */
#define CXL_DOE_TABLE_ACCESS 2
#define CXL_DOE_PROTOCOL_CDAT ((CXL_DOE_TABLE_ACCESS << 16) | CXL_VENDOR_ID)
/* Read Entry - CXL r3.1 8.1.11.1 */
#define CXL_DOE_TAB_TYPE_CDAT 0
#define CXL_DOE_TAB_ENT_MAX 0xFFFF
/* Read Entry Request - CXL r3.1 8.1.11.1 Table 8-13 */
#define CXL_DOE_TAB_REQ 0
typedef struct CDATReq {
DOEHeader header;
uint8_t req_code;
uint8_t table_type;
uint16_t entry_handle;
} QEMU_PACKED CDATReq;
/* Read Entry Response - CXL r3.1 8.1.11.1 Table 8-14 */
#define CXL_DOE_TAB_RSP 0
typedef struct CDATRsp {
DOEHeader header;
uint8_t rsp_code;
uint8_t table_type;
uint16_t entry_handle;
} QEMU_PACKED CDATRsp;
/* CDAT Table Format - CDAT Table 1 */
#define CXL_CDAT_REV 2
typedef struct CDATTableHeader {
uint32_t length;
uint8_t revision;
uint8_t checksum;
uint8_t reserved[6];
uint32_t sequence;
} QEMU_PACKED CDATTableHeader;
/* CDAT Structure Types - CDAT Table 2 */
typedef enum {
CDAT_TYPE_DSMAS = 0,
CDAT_TYPE_DSLBIS = 1,
CDAT_TYPE_DSMSCIS = 2,
CDAT_TYPE_DSIS = 3,
CDAT_TYPE_DSEMTS = 4,
CDAT_TYPE_SSLBIS = 5,
} CDATType;
typedef struct CDATSubHeader {
uint8_t type;
uint8_t reserved;
uint16_t length;
} CDATSubHeader;
/* Device Scoped Memory Affinity Structure - CDAT Table 3 */
typedef struct CDATDsmas {
CDATSubHeader header;
uint8_t DSMADhandle;
uint8_t flags;
#define CDAT_DSMAS_FLAG_NV (1 << 2)
#define CDAT_DSMAS_FLAG_SHAREABLE (1 << 3)
#define CDAT_DSMAS_FLAG_HW_COHERENT (1 << 4)
#define CDAT_DSMAS_FLAG_DYNAMIC_CAP (1 << 5)
uint16_t reserved;
uint64_t DPA_base;
uint64_t DPA_length;
} QEMU_PACKED CDATDsmas;
/* Device Scoped Latency and Bandwidth Information Structure - CDAT Table 5 */
typedef struct CDATDslbis {
CDATSubHeader header;
uint8_t handle;
/* Definitions of these fields refer directly to HMAT fields */
uint8_t flags;
uint8_t data_type;
uint8_t reserved;
uint64_t entry_base_unit;
uint16_t entry[3];
uint16_t reserved2;
} QEMU_PACKED CDATDslbis;
/* Device Scoped Memory Side Cache Information Structure - CDAT Table 6 */
typedef struct CDATDsmscis {
CDATSubHeader header;
uint8_t DSMAS_handle;
uint8_t reserved[3];
uint64_t memory_side_cache_size;
uint32_t cache_attributes;
} QEMU_PACKED CDATDsmscis;
/* Device Scoped Initiator Structure - CDAT Table 7 */
typedef struct CDATDsis {
CDATSubHeader header;
uint8_t flags;
uint8_t handle;
uint16_t reserved;
} QEMU_PACKED CDATDsis;
/* Device Scoped EFI Memory Type Structure - CDAT Table 8 */
typedef struct CDATDsemts {
CDATSubHeader header;
uint8_t DSMAS_handle;
uint8_t EFI_memory_type_attr;
uint16_t reserved;
uint64_t DPA_offset;
uint64_t DPA_length;
} QEMU_PACKED CDATDsemts;
/* Switch Scoped Latency and Bandwidth Information Structure - CDAT Table 9 */
typedef struct CDATSslbisHeader {
CDATSubHeader header;
uint8_t data_type;
uint8_t reserved[3];
uint64_t entry_base_unit;
} CDATSslbisHeader;
QEMU_BUILD_BUG_ON(sizeof(CDATSslbisHeader) != 16);
#define CDAT_PORT_ID_USP 0x100
/* Switch Scoped Latency and Bandwidth Entry - CDAT Table 10 */
typedef struct CDATSslbe {
uint16_t port_x_id;
uint16_t port_y_id;
uint16_t latency_bandwidth;
uint16_t reserved;
} CDATSslbe;
QEMU_BUILD_BUG_ON(sizeof(CDATSslbe) != 8);
typedef struct CDATSslbis {
CDATSslbisHeader sslbis_header;
CDATSslbe sslbe[];
} CDATSslbis;
typedef struct CDATEntry {
void *base;
uint32_t length;
} CDATEntry;
typedef struct CDATObject {
CDATEntry *entry;
int entry_len;
int (*build_cdat_table)(CDATSubHeader ***cdat_table, void *priv);
void (*free_cdat_table)(CDATSubHeader **cdat_table, int num, void *priv);
bool to_update;
void *private;
char *filename;
uint8_t *buf;
struct CDATSubHeader **built_buf;
int built_buf_len;
} CDATObject;
#endif /* CXL_CDAT_H */
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