@@ -6,6 +6,7 @@ source audio/Kconfig
source block/Kconfig
source char/Kconfig
source core/Kconfig
+source cxl/Kconfig
source display/Kconfig
source dma/Kconfig
source gpio/Kconfig
new file mode 100644
@@ -0,0 +1,3 @@
+config CXL
+ bool
+ default y if PCI_EXPRESS
new file mode 100644
@@ -0,0 +1,212 @@
+/*
+ * CXL Utility library for components
+ *
+ * Copyright(C) 2020 Intel Corporation.
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2. See the
+ * COPYING file in the top-level directory.
+ */
+
+#include "qemu/osdep.h"
+#include "qemu/log.h"
+#include "hw/pci/pci.h"
+#include "hw/cxl/cxl.h"
+
+static uint64_t cxl_cache_mem_read_reg(void *opaque, hwaddr offset,
+ unsigned size)
+{
+ CXLComponentState *cxl_cstate = opaque;
+ ComponentRegisters *cregs = &cxl_cstate->crb;
+
+ assert(size == 4);
+
+ if (cregs->special_ops && cregs->special_ops->read) {
+ return cregs->special_ops->read(cxl_cstate, offset, size);
+ } else {
+ return cregs->cache_mem_registers[offset / 4];
+ }
+}
+
+static void cxl_cache_mem_write_reg(void *opaque, hwaddr offset, uint64_t value,
+ unsigned size)
+{
+ CXLComponentState *cxl_cstate = opaque;
+ ComponentRegisters *cregs = &cxl_cstate->crb;
+
+ assert(size == 4);
+
+ if (cregs->special_ops && cregs->special_ops->write) {
+ cregs->special_ops->write(cxl_cstate, offset, value, size);
+ } else {
+ cregs->cache_mem_registers[offset / 4] = value;
+ }
+}
+
+/*
+ * 8.2.3
+ * The access restrictions specified in Section 8.2.2 also apply to CXL 2.0
+ * Component Registers.
+ *
+ * 8.2.2
+ * • A 32 bit register shall be accessed as a 4 Bytes quantity. Partial
+ * reads are not permitted.
+ * • A 64 bit register shall be accessed as a 8 Bytes quantity. Partial
+ * reads are not permitted.
+ *
+ * As of the spec defined today, only 4 byte registers exist.
+ */
+static const MemoryRegionOps cache_mem_ops = {
+ .read = cxl_cache_mem_read_reg,
+ .write = cxl_cache_mem_write_reg,
+ .endianness = DEVICE_LITTLE_ENDIAN,
+ .valid = {
+ .min_access_size = 4,
+ .max_access_size = 8,
+ .unaligned = false,
+ },
+ .impl = {
+ .min_access_size = 4,
+ .max_access_size = 4,
+ },
+};
+
+void cxl_component_register_block_init(Object *obj,
+ CXLComponentState *cxl_cstate,
+ const char *type)
+{
+ ComponentRegisters *cregs = &cxl_cstate->crb;
+
+ memory_region_init(&cregs->component_registers, obj, type,
+ CXL2_COMPONENT_BLOCK_SIZE);
+
+ /* io registers controls link which we don't care about in QEMU */
+ memory_region_init_io(&cregs->io, obj, NULL, cregs, ".io",
+ CXL2_COMPONENT_IO_REGION_SIZE);
+ memory_region_init_io(&cregs->cache_mem, obj, &cache_mem_ops, cregs,
+ ".cache_mem", CXL2_COMPONENT_CM_REGION_SIZE);
+
+ memory_region_add_subregion(&cregs->component_registers, 0, &cregs->io);
+ memory_region_add_subregion(&cregs->component_registers,
+ CXL2_COMPONENT_IO_REGION_SIZE,
+ &cregs->cache_mem);
+}
+
+static void ras_init_common(uint32_t *reg_state)
+{
+ reg_state[R_CXL_RAS_UNC_ERR_STATUS] = 0;
+ reg_state[R_CXL_RAS_UNC_ERR_MASK] = 0x1cfff;
+ reg_state[R_CXL_RAS_UNC_ERR_SEVERITY] = 0x1cfff;
+ reg_state[R_CXL_RAS_COR_ERR_STATUS] = 0;
+ reg_state[R_CXL_RAS_COR_ERR_MASK] = 0x3f;
+
+ /* CXL switches and devices must set */
+ reg_state[R_CXL_RAS_ERR_CAP_CTRL] = 0;
+}
+
+static void hdm_init_common(uint32_t *reg_state)
+{
+ ARRAY_FIELD_DP32(reg_state, CXL_HDM_DECODER_CAPABILITY, DECODER_COUNT, 0);
+ ARRAY_FIELD_DP32(reg_state, CXL_HDM_DECODER_CAPABILITY, TARGET_COUNT, 1);
+ ARRAY_FIELD_DP32(reg_state, CXL_HDM_DECODER_GLOBAL_CONTROL,
+ HDM_DECODER_ENABLE, 0);
+}
+
+void cxl_component_register_init_common(uint32_t *reg_state, enum reg_type type)
+{
+ int caps = 0;
+ switch (type) {
+ case CXL2_DOWNSTREAM_PORT:
+ case CXL2_DEVICE:
+ /* CAP, RAS, Link */
+ caps = 2;
+ break;
+ case CXL2_UPSTREAM_PORT:
+ case CXL2_TYPE3_DEVICE:
+ case CXL2_LOGICAL_DEVICE:
+ /* + HDM */
+ caps = 3;
+ break;
+ case CXL2_ROOT_PORT:
+ /* + Extended Security, + Snoop */
+ caps = 5;
+ break;
+ default:
+ abort();
+ }
+
+ memset(reg_state, 0, CXL2_COMPONENT_CM_REGION_SIZE);
+
+ /* CXL Capability Header Register */
+ ARRAY_FIELD_DP32(reg_state, CXL_CAPABILITY_HEADER, ID, 1);
+ ARRAY_FIELD_DP32(reg_state, CXL_CAPABILITY_HEADER, VERSION, 1);
+ ARRAY_FIELD_DP32(reg_state, CXL_CAPABILITY_HEADER, CACHE_MEM_VERSION, 1);
+ ARRAY_FIELD_DP32(reg_state, CXL_CAPABILITY_HEADER, ARRAY_SIZE, caps);
+
+
+#define init_cap_reg(reg, id, version) \
+ _Static_assert(CXL_##reg##_REGISTERS_OFFSET != 0, "Invalid cap offset\n");\
+ do { \
+ int which = R_CXL_##reg##_CAPABILITY_HEADER; \
+ reg_state[which] = FIELD_DP32(reg_state[which], \
+ CXL_##reg##_CAPABILITY_HEADER, ID, id); \
+ reg_state[which] = \
+ FIELD_DP32(reg_state[which], CXL_##reg##_CAPABILITY_HEADER, \
+ VERSION, version); \
+ reg_state[which] = \
+ FIELD_DP32(reg_state[which], CXL_##reg##_CAPABILITY_HEADER, PTR, \
+ CXL_##reg##_REGISTERS_OFFSET); \
+ } while (0)
+
+ init_cap_reg(RAS, 2, 1);
+ ras_init_common(reg_state);
+
+ init_cap_reg(LINK, 4, 2);
+
+ if (caps < 3) {
+ return;
+ }
+
+ init_cap_reg(HDM, 5, 1);
+ hdm_init_common(reg_state);
+
+ if (caps < 5) {
+ return;
+ }
+
+ init_cap_reg(EXTSEC, 6, 1);
+ init_cap_reg(SNOOP, 8, 1);
+
+#undef init_cap_reg
+}
+
+/*
+ * Helper to creates a DVSEC header for a CXL entity. The caller is responsible
+ * for tracking the valid offset.
+ *
+ * This function will build the DVSEC header on behalf of the caller and then
+ * copy in the remaining data for the vendor specific bits.
+ */
+void cxl_component_create_dvsec(CXLComponentState *cxl, uint16_t length,
+ uint16_t type, uint8_t rev, uint8_t *body)
+{
+ PCIDevice *pdev = cxl->pdev;
+ uint16_t offset = cxl->dvsec_offset;
+
+ assert(offset >= PCI_CFG_SPACE_SIZE &&
+ ((offset + length) < PCI_CFG_SPACE_EXP_SIZE));
+ assert((length & 0xf000) == 0);
+ assert((rev & ~0xf) == 0);
+
+ /* Create the DVSEC in the MCFG space */
+ pcie_add_capability(pdev, PCI_EXT_CAP_ID_DVSEC, 1, offset, length);
+ pci_set_long(pdev->config + offset + PCIE_DVSEC_HEADER1_OFFSET,
+ (length << 20) | (rev << 16) | CXL_VENDOR_ID);
+ pci_set_word(pdev->config + offset + PCIE_DVSEC_ID_OFFSET, type);
+ memcpy(pdev->config + offset + sizeof(struct dvsec_header),
+ body + sizeof(struct dvsec_header),
+ length - sizeof(struct dvsec_header));
+
+ /* Update state for future DVSEC additions */
+ range_init_nofail(&cxl->dvsecs[type], cxl->dvsec_offset, length);
+ cxl->dvsec_offset += length;
+}
new file mode 100644
@@ -0,0 +1,3 @@
+softmmu_ss.add(when: 'CONFIG_CXL', if_true: files(
+ 'cxl-component-utils.c',
+))
@@ -6,6 +6,7 @@ subdir('block')
subdir('char')
subdir('core')
subdir('cpu')
+subdir('cxl')
subdir('display')
subdir('dma')
subdir('gpio')
new file mode 100644
@@ -0,0 +1,16 @@
+/*
+ * QEMU CXL Support
+ *
+ * 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_H
+#define CXL_H
+
+#include "cxl_pci.h"
+#include "cxl_component.h"
+
+#endif
new file mode 100644
@@ -0,0 +1,196 @@
+/*
+ * QEMU CXL Component
+ *
+ * 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_COMPONENT_H
+#define CXL_COMPONENT_H
+
+/* CXL 2.0 - 8.2.4 */
+#define CXL2_COMPONENT_IO_REGION_SIZE 0x1000
+#define CXL2_COMPONENT_CM_REGION_SIZE 0x1000
+#define CXL2_COMPONENT_BLOCK_SIZE 0x10000
+
+#include "qemu/range.h"
+#include "qemu/typedefs.h"
+#include "hw/register.h"
+
+enum reg_type {
+ CXL2_DEVICE,
+ CXL2_TYPE3_DEVICE,
+ CXL2_LOGICAL_DEVICE,
+ CXL2_ROOT_PORT,
+ CXL2_UPSTREAM_PORT,
+ CXL2_DOWNSTREAM_PORT
+};
+
+/*
+ * Capability registers are defined at the top of the CXL.cache/mem region and
+ * are packed. For our purposes we will always define the caps in the same
+ * order.
+ * CXL 2.0 - 8.2.5 Table 142 for details.
+ */
+
+/* CXL 2.0 - 8.2.5.1 */
+REG32(CXL_CAPABILITY_HEADER, 0)
+ FIELD(CXL_CAPABILITY_HEADER, ID, 0, 16)
+ FIELD(CXL_CAPABILITY_HEADER, VERSION, 16, 4)
+ FIELD(CXL_CAPABILITY_HEADER, CACHE_MEM_VERSION, 20, 4)
+ FIELD(CXL_CAPABILITY_HEADER, ARRAY_SIZE, 24, 8)
+
+#define CXLx_CAPABILITY_HEADER(type, offset) \
+ REG32(CXL_##type##_CAPABILITY_HEADER, offset) \
+ FIELD(CXL_##type##_CAPABILITY_HEADER, ID, 0, 16) \
+ FIELD(CXL_##type##_CAPABILITY_HEADER, VERSION, 16, 4) \
+ FIELD(CXL_##type##_CAPABILITY_HEADER, PTR, 20, 12)
+CXLx_CAPABILITY_HEADER(RAS, 0x4)
+CXLx_CAPABILITY_HEADER(LINK, 0x8)
+CXLx_CAPABILITY_HEADER(HDM, 0xc)
+CXLx_CAPABILITY_HEADER(EXTSEC, 0x10)
+CXLx_CAPABILITY_HEADER(SNOOP, 0x14)
+
+/*
+ * Capability structures contain the actual registers that the CXL component
+ * implements. Some of these are specific to certain types of components, but
+ * this implementation leaves enough space regardless.
+ */
+/* 8.2.5.9 - CXL RAS Capability Structure */
+
+/* Give ample space for caps before this */
+#define CXL_RAS_REGISTERS_OFFSET 0x80
+#define CXL_RAS_REGISTERS_SIZE 0x58
+REG32(CXL_RAS_UNC_ERR_STATUS, CXL_RAS_REGISTERS_OFFSET)
+REG32(CXL_RAS_UNC_ERR_MASK, CXL_RAS_REGISTERS_OFFSET + 0x4)
+REG32(CXL_RAS_UNC_ERR_SEVERITY, CXL_RAS_REGISTERS_OFFSET + 0x8)
+REG32(CXL_RAS_COR_ERR_STATUS, CXL_RAS_REGISTERS_OFFSET + 0xc)
+REG32(CXL_RAS_COR_ERR_MASK, CXL_RAS_REGISTERS_OFFSET + 0x10)
+REG32(CXL_RAS_ERR_CAP_CTRL, CXL_RAS_REGISTERS_OFFSET + 0x14)
+/* Offset 0x18 - 0x58 reserved for RAS logs */
+
+/* 8.2.5.10 - CXL Security Capability Structure */
+#define CXL_SEC_REGISTERS_OFFSET \
+ (CXL_RAS_REGISTERS_OFFSET + CXL_RAS_REGISTERS_SIZE)
+#define CXL_SEC_REGISTERS_SIZE 0 /* We don't implement 1.1 downstream ports */
+
+/* 8.2.5.11 - CXL Link Capability Structure */
+#define CXL_LINK_REGISTERS_OFFSET \
+ (CXL_SEC_REGISTERS_OFFSET + CXL_SEC_REGISTERS_SIZE)
+#define CXL_LINK_REGISTERS_SIZE 0x38
+
+/* 8.2.5.12 - CXL HDM Decoder Capability Structure */
+#define HDM_DECODE_MAX 10 /* 8.2.5.12.1 */
+#define CXL_HDM_REGISTERS_OFFSET \
+ (CXL_LINK_REGISTERS_OFFSET + CXL_LINK_REGISTERS_SIZE)
+#define CXL_HDM_REGISTERS_SIZE (0x20 + HDM_DECODE_MAX + 10)
+#define HDM_DECODER_INIT(n) \
+ REG32(CXL_HDM_DECODER##n##_BASE_LO, \
+ CXL_HDM_REGISTERS_OFFSET + (0x20 * n) + 0x10) \
+ FIELD(CXL_HDM_DECODER##n##_BASE_LO, L, 28, 4) \
+ REG32(CXL_HDM_DECODER##n##_BASE_HI, \
+ CXL_HDM_REGISTERS_OFFSET + (0x20 * n) + 0x14) \
+ REG32(CXL_HDM_DECODER##n##_SIZE_LO, \
+ CXL_HDM_REGISTERS_OFFSET + (0x20 * n) + 0x18) \
+ REG32(CXL_HDM_DECODER##n##_SIZE_HI, \
+ CXL_HDM_REGISTERS_OFFSET + (0x20 * n) + 0x1C) \
+ REG32(CXL_HDM_DECODER##n##_CTRL, \
+ CXL_HDM_REGISTERS_OFFSET + (0x20 * n) + 0x20) \
+ FIELD(CXL_HDM_DECODER##n##_CTRL, IG, 0, 4) \
+ FIELD(CXL_HDM_DECODER##n##_CTRL, IW, 4, 4) \
+ FIELD(CXL_HDM_DECODER##n##_CTRL, LOCK_ON_COMMIT, 8, 1) \
+ FIELD(CXL_HDM_DECODER##n##_CTRL, COMMIT, 9, 1) \
+ FIELD(CXL_HDM_DECODER##n##_CTRL, COMMITTED, 10, 1) \
+ FIELD(CXL_HDM_DECODER##n##_CTRL, ERROR, 11, 1) \
+ FIELD(CXL_HDM_DECODER##n##_CTRL, TYPE, 12, 1) \
+ REG32(CXL_HDM_DECODER##n##_TARGET_LIST_LO, \
+ CXL_HDM_REGISTERS_OFFSET + (0x20 * n) + 0x24) \
+ REG32(CXL_HDM_DECODER##n##_TARGET_LIST_HI, \
+ CXL_HDM_REGISTERS_OFFSET + (0x20 * n) + 0x28)
+
+REG32(CXL_HDM_DECODER_CAPABILITY, CXL_HDM_REGISTERS_OFFSET)
+ FIELD(CXL_HDM_DECODER_CAPABILITY, DECODER_COUNT, 0, 4)
+ FIELD(CXL_HDM_DECODER_CAPABILITY, TARGET_COUNT, 4, 4)
+ FIELD(CXL_HDM_DECODER_CAPABILITY, INTERLEAVE_256B, 8, 1)
+ FIELD(CXL_HDM_DECODER_CAPABILITY, INTELEAVE_4K, 9, 1)
+ FIELD(CXL_HDM_DECODER_CAPABILITY, POISON_ON_ERR_CAP, 10, 1)
+REG32(CXL_HDM_DECODER_GLOBAL_CONTROL, CXL_HDM_REGISTERS_OFFSET + 4)
+ FIELD(CXL_HDM_DECODER_GLOBAL_CONTROL, POISON_ON_ERR_EN, 0, 1)
+ FIELD(CXL_HDM_DECODER_GLOBAL_CONTROL, HDM_DECODER_ENABLE, 1, 1)
+
+HDM_DECODER_INIT(0);
+
+/* 8.2.5.13 - CXL Extended Security Capability Structure (Root complex only) */
+#define EXTSEC_ENTRY_MAX 256
+#define CXL_EXTSEC_REGISTERS_OFFSET \
+ (CXL_HDM_REGISTERS_OFFSET + CXL_HDM_REGISTERS_SIZE)
+#define CXL_EXTSEC_REGISTERS_SIZE (8 * EXTSEC_ENTRY_MAX + 4)
+
+/* 8.2.5.14 - CXL IDE Capability Structure */
+#define CXL_IDE_REGISTERS_OFFSET \
+ (CXL_EXTSEC_REGISTERS_OFFSET + CXL_EXTSEC_REGISTERS_SIZE)
+#define CXL_IDE_REGISTERS_SIZE 0x20
+
+/* 8.2.5.15 - CXL Snoop Filter Capability Structure */
+#define CXL_SNOOP_REGISTERS_OFFSET \
+ (CXL_IDE_REGISTERS_OFFSET + CXL_IDE_REGISTERS_SIZE)
+#define CXL_SNOOP_REGISTERS_SIZE 0x8
+
+_Static_assert((CXL_SNOOP_REGISTERS_OFFSET + CXL_SNOOP_REGISTERS_SIZE) < 0x1000,
+ "No space for registers");
+
+typedef struct component_registers {
+ /*
+ * Main memory region to be registered with QEMU core.
+ */
+ MemoryRegion component_registers;
+
+ /*
+ * 8.2.4 Table 141:
+ * 0x0000 - 0x0fff CXL.io registers
+ * 0x1000 - 0x1fff CXL.cache and CXL.mem
+ * 0x2000 - 0xdfff Implementation specific
+ * 0xe000 - 0xe3ff CXL ARB/MUX registers
+ * 0xe400 - 0xffff RSVD
+ */
+ uint32_t io_registers[CXL2_COMPONENT_IO_REGION_SIZE >> 2];
+ MemoryRegion io;
+
+ uint32_t cache_mem_registers[CXL2_COMPONENT_CM_REGION_SIZE >> 2];
+ MemoryRegion cache_mem;
+
+ MemoryRegion impl_specific;
+ MemoryRegion arb_mux;
+ MemoryRegion rsvd;
+
+ /* special_ops is used for any component that needs any specific handling */
+ MemoryRegionOps *special_ops;
+} ComponentRegisters;
+
+/*
+ * A CXL component represents all entities in a CXL hierarchy. This includes,
+ * host bridges, root ports, upstream/downstream switch ports, and devices
+ */
+typedef struct cxl_component {
+ ComponentRegisters crb;
+ union {
+ struct {
+ Range dvsecs[CXL20_MAX_DVSEC];
+ uint16_t dvsec_offset;
+ struct PCIDevice *pdev;
+ };
+ };
+} CXLComponentState;
+
+void cxl_component_register_block_init(Object *obj,
+ CXLComponentState *cxl_cstate,
+ const char *type);
+void cxl_component_register_init_common(uint32_t *reg_state,
+ enum reg_type type);
+
+void cxl_component_create_dvsec(CXLComponentState *cxl_cstate, uint16_t length,
+ uint16_t type, uint8_t rev, uint8_t *body);
+
+#endif
new file mode 100644
@@ -0,0 +1,138 @@
+/*
+ * 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 "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 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
+};
+
+struct dvsec_header {
+ uint32_t cap_hdr;
+ uint32_t dv_hdr1;
+ uint16_t dv_hdr2;
+} __attribute__((__packed__));
+_Static_assert(sizeof(struct dvsec_header) == 10,
+ "dvsec header size incorrect");
+
+/*
+ * 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) */
+struct cxl_dvsec_port_extensions {
+ struct dvsec_header 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_base_low;
+ uint32_t rcrb_base;
+ uint32_t rcrb_base_high;
+};
+_Static_assert(sizeof(struct cxl_dvsec_port_extensions) == 0x28,
+ "extensions dvsec port size incorrect");
+#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) */
+struct cxl_dvsec_port_gpf {
+ struct dvsec_header hdr;
+ uint16_t rsvd;
+ uint16_t phase1_ctrl;
+ uint16_t phase2_ctrl;
+};
+_Static_assert(sizeof(struct cxl_dvsec_port_gpf) == 0x10,
+ "dvsec port GPF size incorrect");
+
+/* CXL 2.0 - 8.1.8/8.2.1.3 Flexbus DVSEC (ID 0007) */
+struct cxl_dvsec_port_flexbus {
+ struct dvsec_header hdr;
+ uint16_t cap;
+ uint16_t ctrl;
+ uint16_t status;
+ uint32_t rcvd_mod_ts_data_phase1;
+};
+_Static_assert(sizeof(struct cxl_dvsec_port_flexbus) == 0x14,
+ "dvsec port flexbus size incorrect");
+
+/* CXL 2.0 - 8.1.9 Register Locator DVSEC (ID 0008) */
+struct cxl_dvsec_register_locator {
+ struct dvsec_header 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;
+};
+_Static_assert(sizeof(struct cxl_dvsec_register_locator) == 0x24,
+ "dvsec register locator size incorrect");
+
+/* 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