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_bridge.h" 17 #include "hw/pci/pci_host.h" 18 #include "cxl_pci.h" 19 #include "cxl_component.h" 20 #include "cxl_device.h" 21 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 CXLFixedWindow { 28 uint64_t size; 29 char **targets; 30 struct PXBDev *target_hbs[8]; 31 uint8_t num_targets; 32 uint8_t enc_int_ways; 33 uint8_t enc_int_gran; 34 /* Todo: XOR based interleaving */ 35 MemoryRegion mr; 36 hwaddr base; 37 } CXLFixedWindow; 38 39 typedef struct CXLState { 40 bool is_enabled; 41 MemoryRegion host_mr; 42 unsigned int next_mr_idx; 43 GList *fixed_windows; 44 CXLFixedMemoryWindowOptionsList *cfmw_list; 45 } CXLState; 46 47 struct CXLHost { 48 PCIHostState parent_obj; 49 50 CXLComponentState cxl_cstate; 51 }; 52 53 #define TYPE_PXB_CXL_HOST "pxb-cxl-host" 54 OBJECT_DECLARE_SIMPLE_TYPE(CXLHost, PXB_CXL_HOST) 55 56 #define TYPE_CXL_USP "cxl-upstream" 57 58 typedef struct CXLUpstreamPort CXLUpstreamPort; 59 DECLARE_INSTANCE_CHECKER(CXLUpstreamPort, CXL_USP, TYPE_CXL_USP) 60 CXLComponentState *cxl_usp_to_cstate(CXLUpstreamPort *usp); 61 #endif 62