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 "qapi/qapi-visit-machine.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_CACHE_LINE_SIZE 64 22 #define CXL_COMPONENT_REG_BAR_IDX 0 23 #define CXL_DEVICE_REG_BAR_IDX 2 24 25 #define CXL_WINDOW_MAX 10 26 27 typedef struct PXBCXLDev PXBCXLDev; 28 29 typedef struct CXLFixedWindow { 30 uint64_t size; 31 char **targets; 32 PXBCXLDev *target_hbs[16]; 33 uint8_t num_targets; 34 uint8_t enc_int_ways; 35 uint8_t enc_int_gran; 36 /* Todo: XOR based interleaving */ 37 MemoryRegion mr; 38 hwaddr base; 39 } CXLFixedWindow; 40 41 typedef struct CXLState { 42 bool is_enabled; 43 MemoryRegion host_mr; 44 unsigned int next_mr_idx; 45 GList *fixed_windows; 46 CXLFixedMemoryWindowOptionsList *cfmw_list; 47 } CXLState; 48 49 struct CXLHost { 50 PCIHostState parent_obj; 51 52 CXLComponentState cxl_cstate; 53 bool passthrough; 54 }; 55 56 #define TYPE_PXB_CXL_HOST "pxb-cxl-host" 57 OBJECT_DECLARE_SIMPLE_TYPE(CXLHost, PXB_CXL_HOST) 58 59 #define TYPE_CXL_USP "cxl-upstream" 60 61 typedef struct CXLUpstreamPort CXLUpstreamPort; 62 DECLARE_INSTANCE_CHECKER(CXLUpstreamPort, CXL_USP, TYPE_CXL_USP) 63 CXLComponentState *cxl_usp_to_cstate(CXLUpstreamPort *usp); 64 65 #define TYPE_CXL_DSP "cxl-downstream" 66 67 typedef struct CXLDownstreamPort CXLDownstreamPort; 68 DECLARE_INSTANCE_CHECKER(CXLDownstreamPort, CXL_DSP, TYPE_CXL_DSP) 69 70 #endif 71