1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
|
/*
* 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/compiler.h"
#include "qemu/range.h"
#include "qemu/typedefs.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
};
/*
* 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 (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_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)
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
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);
static inline int cxl_decoder_count_enc(int count)
{
switch (count) {
case 1: return 0;
case 2: return 1;
case 4: return 2;
case 6: return 3;
case 8: return 4;
case 10: return 5;
}
return 0;
}
uint8_t cxl_interleave_ways_enc(int iw, Error **errp);
uint8_t cxl_interleave_granularity_enc(uint64_t gran, Error **errp);
static inline hwaddr cxl_decode_ig(int ig)
{
return 1ULL << (ig + 8);
}
CXLComponentState *cxl_get_hb_cstate(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
|
