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/*
* QEMU CXL PCI interfaces
*
* Copyright (c) 2020 Intel
*
* This work is licensed under the terms of the GNU GPL, version 2. See the
* COPYING file in the top-level directory.
*/
#ifndef CXL_PCI_H
#define CXL_PCI_H
#include "qemu/compiler.h"
#include "hw/pci/pci.h"
#include "hw/pci/pcie.h"
#define CXL_VENDOR_ID 0x1e98
#define PCIE_DVSEC_HEADER1_OFFSET 0x4 /* Offset from start of extend cap */
#define PCIE_DVSEC_ID_OFFSET 0x8
#define PCIE_CXL_DEVICE_DVSEC_LENGTH 0x38
#define PCIE_CXL1_DEVICE_DVSEC_REVID 0
#define PCIE_CXL2_DEVICE_DVSEC_REVID 1
#define EXTENSIONS_PORT_DVSEC_LENGTH 0x28
#define EXTENSIONS_PORT_DVSEC_REVID 0
#define GPF_PORT_DVSEC_LENGTH 0x10
#define GPF_PORT_DVSEC_REVID 0
#define GPF_DEVICE_DVSEC_LENGTH 0x10
#define GPF_DEVICE_DVSEC_REVID 0
#define PCIE_FLEXBUS_PORT_DVSEC_LENGTH_2_0 0x14
#define PCIE_FLEXBUS_PORT_DVSEC_REVID_2_0 1
#define REG_LOC_DVSEC_LENGTH 0x24
#define REG_LOC_DVSEC_REVID 0
enum {
PCIE_CXL_DEVICE_DVSEC = 0,
NON_CXL_FUNCTION_MAP_DVSEC = 2,
EXTENSIONS_PORT_DVSEC = 3,
GPF_PORT_DVSEC = 4,
GPF_DEVICE_DVSEC = 5,
PCIE_FLEXBUS_PORT_DVSEC = 7,
REG_LOC_DVSEC = 8,
MLD_DVSEC = 9,
CXL20_MAX_DVSEC
};
typedef struct DVSECHeader {
uint32_t cap_hdr;
uint32_t dv_hdr1;
uint16_t dv_hdr2;
} QEMU_PACKED DVSECHeader;
QEMU_BUILD_BUG_ON(sizeof(DVSECHeader) != 10);
/*
* CXL 2.0 devices must implement certain DVSEC IDs, and can [optionally]
* implement others.
*
* CXL 2.0 Device: 0, [2], 5, 8
* CXL 2.0 RP: 3, 4, 7, 8
* CXL 2.0 Upstream Port: [2], 7, 8
* CXL 2.0 Downstream Port: 3, 4, 7, 8
*/
/* CXL 2.0 - 8.1.5 (ID 0003) */
typedef struct CXLDVSECPortExtensions {
DVSECHeader hdr;
uint16_t status;
uint16_t control;
uint8_t alt_bus_base;
uint8_t alt_bus_limit;
uint16_t alt_memory_base;
uint16_t alt_memory_limit;
uint16_t alt_prefetch_base;
uint16_t alt_prefetch_limit;
uint32_t alt_prefetch_base_high;
uint32_t alt_prefetch_limit_high;
uint32_t rcrb_base;
uint32_t rcrb_base_high;
} CXLDVSECPortExtensions;
QEMU_BUILD_BUG_ON(sizeof(CXLDVSECPortExtensions) != 0x28);
#define PORT_CONTROL_OFFSET 0xc
#define PORT_CONTROL_UNMASK_SBR 1
#define PORT_CONTROL_ALT_MEMID_EN 4
/* CXL 2.0 - 8.1.6 GPF DVSEC (ID 0004) */
typedef struct CXLDVSECPortGPF {
DVSECHeader hdr;
uint16_t rsvd;
uint16_t phase1_ctrl;
uint16_t phase2_ctrl;
} CXLDVSECPortGPF;
QEMU_BUILD_BUG_ON(sizeof(CXLDVSECPortGPF) != 0x10);
/* CXL 2.0 - 8.1.7 GPF DVSEC for CXL Device */
typedef struct CXLDVSECDeviceGPF {
DVSECHeader hdr;
uint16_t phase2_duration;
uint32_t phase2_power;
} CXLDVSECDeviceGPF;
QEMU_BUILD_BUG_ON(sizeof(CXLDVSECDeviceGPF) != 0x10);
/* CXL 2.0 - 8.1.8/8.2.1.3 Flex Bus DVSEC (ID 0007) */
typedef struct CXLDVSECPortFlexBus {
DVSECHeader hdr;
uint16_t cap;
uint16_t ctrl;
uint16_t status;
uint32_t rcvd_mod_ts_data_phase1;
} CXLDVSECPortFlexBus;
QEMU_BUILD_BUG_ON(sizeof(CXLDVSECPortFlexBus) != 0x14);
/* CXL 2.0 - 8.1.9 Register Locator DVSEC (ID 0008) */
typedef struct CXLDVSECRegisterLocator {
DVSECHeader hdr;
uint16_t rsvd;
uint32_t reg0_base_lo;
uint32_t reg0_base_hi;
uint32_t reg1_base_lo;
uint32_t reg1_base_hi;
uint32_t reg2_base_lo;
uint32_t reg2_base_hi;
} CXLDVSECRegisterLocator;
QEMU_BUILD_BUG_ON(sizeof(CXLDVSECRegisterLocator) != 0x24);
/* BAR Equivalence Indicator */
#define BEI_BAR_10H 0
#define BEI_BAR_14H 1
#define BEI_BAR_18H 2
#define BEI_BAR_1cH 3
#define BEI_BAR_20H 4
#define BEI_BAR_24H 5
/* Register Block Identifier */
#define RBI_EMPTY 0
#define RBI_COMPONENT_REG (1 << 8)
#define RBI_BAR_VIRT_ACL (2 << 8)
#define RBI_CXL_DEVICE_REG (3 << 8)
#endif
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