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 VTPCI_DEV(hw) = pci_dev; 77 78 if (rte_eal_process_type() == RTE_PROC_PRIMARY) { 79 ret = vtpci_init(RTE_ETH_DEV_TO_PCI(eth_dev), hw); 80 if (ret) { 81 PMD_INIT_LOG(ERR, "Failed to init PCI device\n"); 82 return -1; 83 } 84 } else { 85 ret = virtio_remap_pci(RTE_ETH_DEV_TO_PCI(eth_dev), hw); 86 if (ret < 0) { 87 PMD_INIT_LOG(ERR, "Failed to remap PCI device\n"); 88 return -1; 89 } 90 } 91 92 ret = eth_virtio_dev_init(eth_dev); 93 if (ret < 0) { 94 PMD_INIT_LOG(ERR, "Failed to init virtio device\n"); 95 goto err_unmap; 96 } 97 98 PMD_INIT_LOG(DEBUG, "port %d vendorID=0x%x deviceID=0x%x", 99 eth_dev->data->port_id, pci_dev->id.vendor_id, 100 pci_dev->id.device_id); 101 102 return 0; 103 104 err_unmap: 105 rte_pci_unmap_device(RTE_ETH_DEV_TO_PCI(eth_dev)); 106 if (hw->bus_type == VIRTIO_BUS_PCI_LEGACY) 107 rte_pci_ioport_unmap(VTPCI_IO(hw)); 108 109 return ret; 110 } 111 112 static int 113 eth_virtio_pci_uninit(struct rte_eth_dev *eth_dev) 114 { 115 int ret; 116 PMD_INIT_FUNC_TRACE(); 117 118 if (rte_eal_process_type() == RTE_PROC_SECONDARY) 119 return 0; 120 121 ret = virtio_dev_stop(eth_dev); 122 virtio_dev_close(eth_dev); 123 124 PMD_INIT_LOG(DEBUG, "dev_uninit completed"); 125 126 return ret; 127 } 128 129 static int vdpa_check_handler(__rte_unused const char *key, 130 const char *value, void *ret_val) 131 { 132 if (strcmp(value, "1") == 0) 133 *(int *)ret_val = 1; 134 else 135 *(int *)ret_val = 0; 136 137 return 0; 138 } 139 140 #define VIRTIO_ARG_VDPA "vdpa" 141 142 static int 143 virtio_pci_devargs_parse(struct rte_devargs *devargs, int *vdpa) 144 { 145 struct rte_kvargs *kvlist; 146 int ret = 0; 147 148 if (devargs == NULL) 149 return 0; 150 151 kvlist = rte_kvargs_parse(devargs->args, NULL); 152 if (kvlist == NULL) { 153 PMD_INIT_LOG(ERR, "error when parsing param"); 154 return 0; 155 } 156 157 if (rte_kvargs_count(kvlist, VIRTIO_ARG_VDPA) == 1) { 158 /* vdpa mode selected when there's a key-value pair: 159 * vdpa=1 160 */ 161 ret = rte_kvargs_process(kvlist, VIRTIO_ARG_VDPA, 162 vdpa_check_handler, vdpa); 163 if (ret < 0) 164 PMD_INIT_LOG(ERR, "Failed to parse %s", VIRTIO_ARG_VDPA); 165 } 166 167 rte_kvargs_free(kvlist); 168 169 return ret; 170 } 171 172 static int eth_virtio_pci_probe(struct rte_pci_driver *pci_drv __rte_unused, 173 struct rte_pci_device *pci_dev) 174 { 175 int vdpa = 0; 176 int ret = 0; 177 178 ret = virtio_pci_devargs_parse(pci_dev->device.devargs, &vdpa); 179 if (ret < 0) { 180 PMD_INIT_LOG(ERR, "devargs parsing is failed"); 181 return ret; 182 } 183 /* virtio pmd skips probe if device needs to work in vdpa mode */ 184 if (vdpa == 1) 185 return 1; 186 187 return rte_eth_dev_pci_generic_probe(pci_dev, sizeof(struct virtio_pci_dev), 188 eth_virtio_pci_init); 189 } 190 191 static int eth_virtio_pci_remove(struct rte_pci_device *pci_dev) 192 { 193 int ret; 194 195 ret = rte_eth_dev_pci_generic_remove(pci_dev, eth_virtio_pci_uninit); 196 /* Port has already been released by close. */ 197 if (ret == -ENODEV) 198 ret = 0; 199 return ret; 200 } 201 202 static struct rte_pci_driver rte_virtio_net_pci_pmd = { 203 .driver = { 204 .name = "net_virtio", 205 }, 206 .id_table = pci_id_virtio_map, 207 .drv_flags = 0, 208 .probe = eth_virtio_pci_probe, 209 .remove = eth_virtio_pci_remove, 210 }; 211 212 RTE_INIT(rte_virtio_net_pci_pmd_init) 213 { 214 rte_eal_iopl_init(); 215 rte_pci_register(&rte_virtio_net_pci_pmd); 216 } 217 218 RTE_PMD_REGISTER_PCI_TABLE(net_virtio, pci_id_virtio_map); 219 RTE_PMD_REGISTER_KMOD_DEP(net_virtio, "* igb_uio | uio_pci_generic | vfio-pci"); 220 RTE_PMD_EXPORT_NAME(net_virtio, __COUNTER__); 221