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 #include "hw/pci/pci.h" 17 18 struct PCIESriovPF { 19 uint16_t num_vfs; /* Number of virtual functions created */ 20 uint8_t vf_bar_type[PCI_NUM_REGIONS]; /* Store type for each VF bar */ 21 const char *vfname; /* Reference to the device type used for the VFs */ 22 PCIDevice **vf; /* Pointer to an array of num_vfs VF devices */ 23 }; 24 25 struct PCIESriovVF { 26 PCIDevice *pf; /* Pointer back to owner physical function */ 27 uint16_t vf_number; /* Logical VF number of this function */ 28 }; 29 30 void pcie_sriov_pf_init(PCIDevice *dev, uint16_t offset, 31 const char *vfname, uint16_t vf_dev_id, 32 uint16_t init_vfs, uint16_t total_vfs, 33 uint16_t vf_offset, uint16_t vf_stride); 34 void pcie_sriov_pf_exit(PCIDevice *dev); 35 36 /* Set up a VF bar in the SR/IOV bar area */ 37 void pcie_sriov_pf_init_vf_bar(PCIDevice *dev, int region_num, 38 uint8_t type, dma_addr_t size); 39 40 /* Instantiate a bar for a VF */ 41 void pcie_sriov_vf_register_bar(PCIDevice *dev, int region_num, 42 MemoryRegion *memory); 43 44 /* 45 * Default (minimal) page size support values 46 * as required by the SR/IOV standard: 47 * 0x553 << 12 = 0x553000 = 4K + 8K + 64K + 256K + 1M + 4M 48 */ 49 #define SRIOV_SUP_PGSIZE_MINREQ 0x553 50 51 /* 52 * Optionally add supported page sizes to the mask of supported page sizes 53 * Page size values are interpreted as opt_sup_pgsize << 12. 54 */ 55 void pcie_sriov_pf_add_sup_pgsize(PCIDevice *dev, uint16_t opt_sup_pgsize); 56 57 /* SR/IOV capability config write handler */ 58 void pcie_sriov_config_write(PCIDevice *dev, uint32_t address, 59 uint32_t val, int len); 60 61 /* Reset SR/IOV VF Enable bit to unregister all VFs */ 62 void pcie_sriov_pf_disable_vfs(PCIDevice *dev); 63 64 /* Get logical VF number of a VF - only valid for VFs */ 65 uint16_t pcie_sriov_vf_number(PCIDevice *dev); 66 67 /* 68 * Get the physical function that owns this VF. 69 * Returns NULL if dev is not a virtual function 70 */ 71 PCIDevice *pcie_sriov_get_pf(PCIDevice *dev); 72 73 /* 74 * Get the n-th VF of this physical function - only valid for PF. 75 * Returns NULL if index is invalid 76 */ 77 PCIDevice *pcie_sriov_get_vf_at_index(PCIDevice *dev, int n); 78 79 /* Returns the current number of virtual functions. */ 80 uint16_t pcie_sriov_num_vfs(PCIDevice *dev); 81 82 #endif /* QEMU_PCIE_SRIOV_H */ 83