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_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