1 /* SPDX-License-Identifier: BSD-3-Clause 2 * Copyright(c) 2010-2016 Intel Corporation 3 */ 4 5 #include <stdint.h> 6 #include <string.h> 7 #include <stdio.h> 8 #include <errno.h> 9 #include <unistd.h> 10 11 #include <ethdev_driver.h> 12 #include <ethdev_pci.h> 13 #include <rte_pci.h> 14 #include <rte_bus_pci.h> 15 #include <rte_errno.h> 16 17 #include <rte_memory.h> 18 #include <rte_eal.h> 19 #include <rte_dev.h> 20 #include <rte_kvargs.h> 21 22 #include "virtio_ethdev.h" 23 #include "virtio_pci.h" 24 #include "virtio_logs.h" 25 26 /* 27 * The set of PCI devices this driver supports 28 */ 29 static const struct rte_pci_id pci_id_virtio_map[] = { 30 { RTE_PCI_DEVICE(VIRTIO_PCI_VENDORID, VIRTIO_PCI_LEGACY_DEVICEID_NET) }, 31 { RTE_PCI_DEVICE(VIRTIO_PCI_VENDORID, VIRTIO_PCI_MODERN_DEVICEID_NET) }, 32 { .vendor_id = 0, /* sentinel */ }, 33 }; 34 35 36 /* 37 * Remap the PCI device again (IO port map for legacy device and 38 * memory map for modern device), so that the secondary process 39 * could have the PCI initiated correctly. 40 */ 41 static int 42 virtio_remap_pci(struct rte_pci_device *pci_dev, struct virtio_hw *hw) 43 { 44 if (hw->bus_type == VIRTIO_BUS_PCI_MODERN) { 45 /* 46 * We don't have to re-parse the PCI config space, since 47 * rte_pci_map_device() makes sure the mapped address 48 * in secondary process would equal to the one mapped in 49 * the primary process: error will be returned if that 50 * requirement is not met. 51 * 52 * That said, we could simply reuse all cap pointers 53 * (such as dev_cfg, common_cfg, etc.) parsed from the 54 * primary process, which is stored in shared memory. 55 */ 56 if (rte_pci_map_device(pci_dev)) { 57 PMD_INIT_LOG(DEBUG, "failed to map pci device!"); 58 return -1; 59 } 60 } else if (hw->bus_type == VIRTIO_BUS_PCI_LEGACY) { 61 if (rte_pci_ioport_map(pci_dev, 0, VTPCI_IO(hw)) < 0) 62 return -1; 63 } 64 65 return 0; 66 } 67 68 static int 69 eth_virtio_pci_init(struct rte_eth_dev *eth_dev) 70 { 71 struct virtio_pci_dev *dev = eth_dev->data->dev_private; 72 struct virtio_hw *hw = &dev->hw; 73 struct rte_pci_device *pci_dev = RTE_ETH_DEV_TO_PCI(eth_dev); 74 int ret; 75 76 if (rte_eal_process_type() == RTE_PROC_PRIMARY) { 77 ret = vtpci_init(RTE_ETH_DEV_TO_PCI(eth_dev), hw); 78 if (ret) { 79 PMD_INIT_LOG(ERR, "Failed to init PCI device\n"); 80 return -1; 81 } 82 } else { 83 ret = virtio_remap_pci(RTE_ETH_DEV_TO_PCI(eth_dev), hw); 84 if (ret < 0) { 85 PMD_INIT_LOG(ERR, "Failed to remap PCI device\n"); 86 return -1; 87 } 88 } 89 90 ret = eth_virtio_dev_init(eth_dev); 91 if (ret < 0) { 92 PMD_INIT_LOG(ERR, "Failed to init virtio device\n"); 93 goto err_unmap; 94 } 95 96 PMD_INIT_LOG(DEBUG, "port %d vendorID=0x%x deviceID=0x%x", 97 eth_dev->data->port_id, pci_dev->id.vendor_id, 98 pci_dev->id.device_id); 99 100 return 0; 101 102 err_unmap: 103 rte_pci_unmap_device(RTE_ETH_DEV_TO_PCI(eth_dev)); 104 if (hw->bus_type == VIRTIO_BUS_PCI_LEGACY) 105 rte_pci_ioport_unmap(VTPCI_IO(hw)); 106 107 return ret; 108 } 109 110 static int 111 eth_virtio_pci_uninit(struct rte_eth_dev *eth_dev) 112 { 113 int ret; 114 PMD_INIT_FUNC_TRACE(); 115 116 if (rte_eal_process_type() == RTE_PROC_SECONDARY) 117 return 0; 118 119 ret = virtio_dev_stop(eth_dev); 120 virtio_dev_close(eth_dev); 121 122 PMD_INIT_LOG(DEBUG, "dev_uninit completed"); 123 124 return ret; 125 } 126 127 static int vdpa_check_handler(__rte_unused const char *key, 128 const char *value, void *ret_val) 129 { 130 if (strcmp(value, "1") == 0) 131 *(int *)ret_val = 1; 132 else 133 *(int *)ret_val = 0; 134 135 return 0; 136 } 137 138 #define VIRTIO_ARG_VDPA "vdpa" 139 140 static int 141 virtio_pci_devargs_parse(struct rte_devargs *devargs, int *vdpa) 142 { 143 struct rte_kvargs *kvlist; 144 int ret = 0; 145 146 if (devargs == NULL) 147 return 0; 148 149 kvlist = rte_kvargs_parse(devargs->args, NULL); 150 if (kvlist == NULL) { 151 PMD_INIT_LOG(ERR, "error when parsing param"); 152 return 0; 153 } 154 155 if (rte_kvargs_count(kvlist, VIRTIO_ARG_VDPA) == 1) { 156 /* vdpa mode selected when there's a key-value pair: 157 * vdpa=1 158 */ 159 ret = rte_kvargs_process(kvlist, VIRTIO_ARG_VDPA, 160 vdpa_check_handler, vdpa); 161 if (ret < 0) 162 PMD_INIT_LOG(ERR, "Failed to parse %s", VIRTIO_ARG_VDPA); 163 } 164 165 rte_kvargs_free(kvlist); 166 167 return ret; 168 } 169 170 static int eth_virtio_pci_probe(struct rte_pci_driver *pci_drv __rte_unused, 171 struct rte_pci_device *pci_dev) 172 { 173 int vdpa = 0; 174 int ret = 0; 175 176 ret = virtio_pci_devargs_parse(pci_dev->device.devargs, &vdpa); 177 if (ret < 0) { 178 PMD_INIT_LOG(ERR, "devargs parsing is failed"); 179 return ret; 180 } 181 /* virtio pmd skips probe if device needs to work in vdpa mode */ 182 if (vdpa == 1) 183 return 1; 184 185 return rte_eth_dev_pci_generic_probe(pci_dev, sizeof(struct virtio_pci_dev), 186 eth_virtio_pci_init); 187 } 188 189 static int eth_virtio_pci_remove(struct rte_pci_device *pci_dev) 190 { 191 int ret; 192 193 ret = rte_eth_dev_pci_generic_remove(pci_dev, eth_virtio_pci_uninit); 194 /* Port has already been released by close. */ 195 if (ret == -ENODEV) 196 ret = 0; 197 return ret; 198 } 199 200 static struct rte_pci_driver rte_virtio_net_pci_pmd = { 201 .driver = { 202 .name = "net_virtio", 203 }, 204 .id_table = pci_id_virtio_map, 205 .drv_flags = 0, 206 .probe = eth_virtio_pci_probe, 207 .remove = eth_virtio_pci_remove, 208 }; 209 210 RTE_INIT(rte_virtio_net_pci_pmd_init) 211 { 212 rte_eal_iopl_init(); 213 rte_pci_register(&rte_virtio_net_pci_pmd); 214 } 215 216 RTE_PMD_REGISTER_PCI_TABLE(net_virtio, pci_id_virtio_map); 217 RTE_PMD_REGISTER_KMOD_DEP(net_virtio, "* igb_uio | uio_pci_generic | vfio-pci"); 218 RTE_PMD_EXPORT_NAME(net_virtio, __COUNTER__); 219