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qemu/include/hw/cxl/cxl_component.h
Jonathan Cameron 4a58330343 hw/cxl: Add a switch mailbox CCI function 
CXL switch CCIs were added in CXL r3.0. They are a PCI function,
identified by class code that provides a CXL mailbox (identical
to that previously defined for CXL type 3 memory devices) over which
various FM-API commands may be used. Whilst the intent of this
feature is enable switch control from a BMC attached to a switch
upstream port, it is also useful to allow emulation of this feature
on the upstream port connected to a host using the CXL devices as
this greatly simplifies testing.

Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Message-Id: <20231023160806.13206-7-Jonathan.Cameron@huawei.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2023-11-07 03:39:11 -05:00

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/*
* 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 "hw/cxl/cxl_cdat.h"
#include "hw/register.h"
#include "qapi/error.h"
enum reg_type {
CXL2_DEVICE,
CXL2_TYPE3_DEVICE,
CXL2_LOGICAL_DEVICE,
CXL2_ROOT_PORT,
CXL2_UPSTREAM_PORT,
CXL2_DOWNSTREAM_PORT,
CXL3_SWITCH_MAILBOX_CCI,
};
/*
* 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)
#define CXL_RAS_UNC_ERR_CACHE_DATA_PARITY 0
#define CXL_RAS_UNC_ERR_CACHE_ADDRESS_PARITY 1
#define CXL_RAS_UNC_ERR_CACHE_BE_PARITY 2
#define CXL_RAS_UNC_ERR_CACHE_DATA_ECC 3
#define CXL_RAS_UNC_ERR_MEM_DATA_PARITY 4
#define CXL_RAS_UNC_ERR_MEM_ADDRESS_PARITY 5
#define CXL_RAS_UNC_ERR_MEM_BE_PARITY 6
#define CXL_RAS_UNC_ERR_MEM_DATA_ECC 7
#define CXL_RAS_UNC_ERR_REINIT_THRESHOLD 8
#define CXL_RAS_UNC_ERR_RSVD_ENCODING 9
#define CXL_RAS_UNC_ERR_POISON_RECEIVED 10
#define CXL_RAS_UNC_ERR_RECEIVER_OVERFLOW 11
#define CXL_RAS_UNC_ERR_INTERNAL 14
#define CXL_RAS_UNC_ERR_CXL_IDE_TX 15
#define CXL_RAS_UNC_ERR_CXL_IDE_RX 16
#define CXL_RAS_UNC_ERR_CXL_UNUSED 63 /* Magic value */
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)
#define CXL_RAS_COR_ERR_CACHE_DATA_ECC 0
#define CXL_RAS_COR_ERR_MEM_DATA_ECC 1
#define CXL_RAS_COR_ERR_CRC_THRESHOLD 2
#define CXL_RAS_COR_ERR_RETRY_THRESHOLD 3
#define CXL_RAS_COR_ERR_CACHE_POISON_RECEIVED 4
#define CXL_RAS_COR_ERR_MEM_POISON_RECEIVED 5
#define CXL_RAS_COR_ERR_PHYSICAL 6
REG32(CXL_RAS_COR_ERR_MASK, CXL_RAS_REGISTERS_OFFSET + 0x10)
REG32(CXL_RAS_ERR_CAP_CTRL, CXL_RAS_REGISTERS_OFFSET + 0x14)
FIELD(CXL_RAS_ERR_CAP_CTRL, FIRST_ERROR_POINTER, 0, 6)
REG32(CXL_RAS_ERR_HEADER0, CXL_RAS_REGISTERS_OFFSET + 0x18)
#define CXL_RAS_ERR_HEADER_NUM 32
/* 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 (0x10 + 0x20 * HDM_DECODE_MAX)
#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, ERR, 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##n##_DPA_SKIP_LO, \
CXL_HDM_REGISTERS_OFFSET + (0x20 * n) + 0x24) \
REG32(CXL_HDM_DECODER##n##_DPA_SKIP_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, INTERLEAVE_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)
/* Support 4 decoders at all levels of topology */
#define CXL_HDM_DECODER_COUNT 4
HDM_DECODER_INIT(0);
HDM_DECODER_INIT(1);
HDM_DECODER_INIT(2);
HDM_DECODER_INIT(3);
/* 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
QEMU_BUILD_BUG_MSG((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];
uint32_t cache_mem_regs_write_mask[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;
};
};
CDATObject cdat;
} 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,
uint32_t *write_msk,
enum reg_type type);
void cxl_component_create_dvsec(CXLComponentState *cxl_cstate,
enum reg_type cxl_dev_type, uint16_t length,
uint16_t type, uint8_t rev, uint8_t *body);
int cxl_decoder_count_enc(int count);
int cxl_decoder_count_dec(int enc_cnt);
uint8_t cxl_interleave_ways_enc(int iw, Error **errp);
int cxl_interleave_ways_dec(uint8_t iw_enc, Error **errp);
uint8_t cxl_interleave_granularity_enc(uint64_t gran, Error **errp);
hwaddr cxl_decode_ig(int ig);
CXLComponentState *cxl_get_hb_cstate(PCIHostState *hb);
bool cxl_get_hb_passthrough(PCIHostState *hb);
void cxl_doe_cdat_init(CXLComponentState *cxl_cstate, Error **errp);
void cxl_doe_cdat_release(CXLComponentState *cxl_cstate);
void cxl_doe_cdat_update(CXLComponentState *cxl_cstate, Error **errp);
#endif
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