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_COMPONENT_REG_BAR_IDX 0 22 #define CXL_DEVICE_REG_BAR_IDX 2 23 24 #define CXL_WINDOW_MAX 10 25 26 typedef struct PXBCXLDev PXBCXLDev; 27 28 typedef struct CXLFixedWindow { 29 uint64_t size; 30 char **targets; 31 PXBCXLDev *target_hbs[8]; 32 uint8_t num_targets; 33 uint8_t enc_int_ways; 34 uint8_t enc_int_gran; 35 /* Todo: XOR based interleaving */ 36 MemoryRegion mr; 37 hwaddr base; 38 } CXLFixedWindow; 39 40 typedef struct CXLState { 41 bool is_enabled; 42 MemoryRegion host_mr; 43 unsigned int next_mr_idx; 44 GList *fixed_windows; 45 CXLFixedMemoryWindowOptionsList *cfmw_list; 46 } CXLState; 47 48 struct CXLHost { 49 PCIHostState parent_obj; 50 51 CXLComponentState cxl_cstate; 52 bool passthrough; 53 }; 54 55 #define TYPE_PXB_CXL_HOST "pxb-cxl-host" 56 OBJECT_DECLARE_SIMPLE_TYPE(CXLHost, PXB_CXL_HOST) 57 58 #define TYPE_CXL_USP "cxl-upstream" 59 60 typedef struct CXLUpstreamPort CXLUpstreamPort; 61 DECLARE_INSTANCE_CHECKER(CXLUpstreamPort, CXL_USP, TYPE_CXL_USP) 62 CXLComponentState *cxl_usp_to_cstate(CXLUpstreamPort *usp); 63 #endif 64