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 typedef 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 } PCIESriovPF; 24 25 typedef struct PCIESriovVF { 26 PCIDevice *pf; /* Pointer back to owner physical function */ 27 uint16_t vf_number; /* Logical VF number of this function */ 28 } PCIESriovVF; 29 30 bool 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 Error **errp); 35 void pcie_sriov_pf_exit(PCIDevice *dev); 36 37 /* Set up a VF bar in the SR/IOV bar area */ 38 void pcie_sriov_pf_init_vf_bar(PCIDevice *dev, int region_num, 39 uint8_t type, dma_addr_t size); 40 41 /* Instantiate a bar for a VF */ 42 void pcie_sriov_vf_register_bar(PCIDevice *dev, int region_num, 43 MemoryRegion *memory); 44 45 /* 46 * Default (minimal) page size support values 47 * as required by the SR/IOV standard: 48 * 0x553 << 12 = 0x553000 = 4K + 8K + 64K + 256K + 1M + 4M 49 */ 50 #define SRIOV_SUP_PGSIZE_MINREQ 0x553 51 52 /* 53 * Optionally add supported page sizes to the mask of supported page sizes 54 * Page size values are interpreted as opt_sup_pgsize << 12. 55 */ 56 void pcie_sriov_pf_add_sup_pgsize(PCIDevice *dev, uint16_t opt_sup_pgsize); 57 58 /* SR/IOV capability config write handler */ 59 void pcie_sriov_config_write(PCIDevice *dev, uint32_t address, 60 uint32_t val, int len); 61 62 /* Reset SR/IOV */ 63 void pcie_sriov_pf_reset(PCIDevice *dev); 64 65 /* Get logical VF number of a VF - only valid for VFs */ 66 uint16_t pcie_sriov_vf_number(PCIDevice *dev); 67 68 /* 69 * Get the physical function that owns this VF. 70 * Returns NULL if dev is not a virtual function 71 */ 72 PCIDevice *pcie_sriov_get_pf(PCIDevice *dev); 73 74 /* 75 * Get the n-th VF of this physical function - only valid for PF. 76 * Returns NULL if index is invalid 77 */ 78 PCIDevice *pcie_sriov_get_vf_at_index(PCIDevice *dev, int n); 79 80 /* Returns the current number of virtual functions. */ 81 uint16_t pcie_sriov_num_vfs(PCIDevice *dev); 82 83 #endif /* QEMU_PCIE_SRIOV_H */ 84