include/hw/cxl/cxl.h

   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