xref: /openbmc/qemu/include/hw/cxl/cxl.h (revision d6cd3ae0)
1 /*
2  * QEMU CXL Support
3  *
4  * Copyright (c) 2020 Intel
5  *
6  * This work is licensed under the terms of the GNU GPL, version 2. See the
7  * COPYING file in the top-level directory.
8  */
9 
10 #ifndef CXL_H
11 #define CXL_H
12 
13 
14 #include "qapi/qapi-types-machine.h"
15 #include "hw/pci/pci_bridge.h"
16 #include "hw/pci/pci_host.h"
17 #include "cxl_pci.h"
18 #include "cxl_component.h"
19 #include "cxl_device.h"
20 
21 #define CXL_COMPONENT_REG_BAR_IDX 0
22 #define CXL_DEVICE_REG_BAR_IDX 2
23 
24 #define CXL_WINDOW_MAX 10
25 
26 typedef struct CXLFixedWindow {
27     uint64_t size;
28     char **targets;
29     struct PXBDev *target_hbs[8];
30     uint8_t num_targets;
31     uint8_t enc_int_ways;
32     uint8_t enc_int_gran;
33     /* Todo: XOR based interleaving */
34     MemoryRegion mr;
35     hwaddr base;
36 } CXLFixedWindow;
37 
38 typedef struct CXLState {
39     bool is_enabled;
40     MemoryRegion host_mr;
41     unsigned int next_mr_idx;
42     GList *fixed_windows;
43 } CXLState;
44 
45 struct CXLHost {
46     PCIHostState parent_obj;
47 
48     CXLComponentState cxl_cstate;
49 };
50 
51 #define TYPE_PXB_CXL_HOST "pxb-cxl-host"
52 OBJECT_DECLARE_SIMPLE_TYPE(CXLHost, PXB_CXL_HOST)
53 
54 void cxl_fixed_memory_window_config(MachineState *ms,
55                                     CXLFixedMemoryWindowOptions *object,
56                                     Error **errp);
57 void cxl_fixed_memory_window_link_targets(Error **errp);
58 
59 extern const MemoryRegionOps cfmws_ops;
60 
61 #endif
62