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 "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