include/hw/pci/pcie_sriov.h

   1 /*
   2  * pcie_sriov.h:
   3  *
   4  * Implementation of SR/IOV emulation support.
   5  *
   6  * Copyright (c) 2015 Knut Omang <knut.omang@oracle.com>
   7  *
   8  * This work is licensed under the terms of the GNU GPL, version 2 or later.
   9  * See the COPYING file in the top-level directory.
  10  *
  11  */
  12
  13 #ifndef QEMU_PCIE_SRIOV_H
  14 #define QEMU_PCIE_SRIOV_H
  15
  16 struct PCIESriovPF {
  17     uint16_t num_vfs;   /* Number of virtual functions created */
  18     uint8_t vf_bar_type[PCI_NUM_REGIONS];   /* Store type for each VF bar */
  19     const char *vfname; /* Reference to the device type used for the VFs */
  20     PCIDevice **vf;     /* Pointer to an array of num_vfs VF devices */
  21 };
  22
  23 struct PCIESriovVF {
  24     PCIDevice *pf;      /* Pointer back to owner physical function */
  25     uint16_t vf_number; /* Logical VF number of this function */
  26 };
  27
  28 void pcie_sriov_pf_init(PCIDevice *dev, uint16_t offset,
  29                         const char *vfname, uint16_t vf_dev_id,
  30                         uint16_t init_vfs, uint16_t total_vfs,
  31                         uint16_t vf_offset, uint16_t vf_stride);
  32 void pcie_sriov_pf_exit(PCIDevice *dev);
  33
  34 /* Set up a VF bar in the SR/IOV bar area */
  35 void pcie_sriov_pf_init_vf_bar(PCIDevice *dev, int region_num,
  36                                uint8_t type, dma_addr_t size);
  37
  38 /* Instantiate a bar for a VF */
  39 void pcie_sriov_vf_register_bar(PCIDevice *dev, int region_num,
  40                                 MemoryRegion *memory);
  41
  42 /*
  43  * Default (minimal) page size support values
  44  * as required by the SR/IOV standard:
  45  * 0x553 << 12 = 0x553000 = 4K + 8K + 64K + 256K + 1M + 4M
  46  */
  47 #define SRIOV_SUP_PGSIZE_MINREQ 0x553
  48
  49 /*
  50  * Optionally add supported page sizes to the mask of supported page sizes
  51  * Page size values are interpreted as opt_sup_pgsize << 12.
  52  */
  53 void pcie_sriov_pf_add_sup_pgsize(PCIDevice *dev, uint16_t opt_sup_pgsize);
  54
  55 /* SR/IOV capability config write handler */
  56 void pcie_sriov_config_write(PCIDevice *dev, uint32_t address,
  57                              uint32_t val, int len);
  58
  59 /* Reset SR/IOV VF Enable bit to unregister all VFs */
  60 void pcie_sriov_pf_disable_vfs(PCIDevice *dev);
  61
  62 /* Get logical VF number of a VF - only valid for VFs */
  63 uint16_t pcie_sriov_vf_number(PCIDevice *dev);
  64
  65 /*
  66  * Get the physical function that owns this VF.
  67  * Returns NULL if dev is not a virtual function
  68  */
  69 PCIDevice *pcie_sriov_get_pf(PCIDevice *dev);
  70
  71 /*
  72  * Get the n-th VF of this physical function - only valid for PF.
  73  * Returns NULL if index is invalid
  74  */
  75 PCIDevice *pcie_sriov_get_vf_at_index(PCIDevice *dev, int n);
  76
  77 #endif /* QEMU_PCIE_SRIOV_H */