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_pci_dev *dev) 43 { 44 struct virtio_hw *hw = &dev->hw; 45 46 if (dev->modern) { 47 /* 48 * We don't have to re-parse the PCI config space, since 49 * rte_pci_map_device() makes sure the mapped address 50 * in secondary process would equal to the one mapped in 51 * the primary process: error will be returned if that 52 * requirement is not met. 53 * 54 * That said, we could simply reuse all cap pointers 55 * (such as dev_cfg, common_cfg, etc.) parsed from the 56 * primary process, which is stored in shared memory. 57 */ 58 if (rte_pci_map_device(pci_dev)) { 59 PMD_INIT_LOG(DEBUG, "failed to map pci device!"); 60 return -1; 61 } 62 } else { 63 if (rte_pci_ioport_map(pci_dev, 0, VTPCI_IO(hw)) < 0) 64 return -1; 65 } 66 67 return 0; 68 } 69 70 static int 71 eth_virtio_pci_init(struct rte_eth_dev *eth_dev) 72 { 73 struct virtio_pci_dev *dev = eth_dev->data->dev_private; 74 struct virtio_hw *hw = &dev->hw; 75 struct rte_pci_device *pci_dev = RTE_ETH_DEV_TO_PCI(eth_dev); 76 int ret; 77 78 VTPCI_DEV(hw) = pci_dev; 79 80 if (rte_eal_process_type() == RTE_PROC_PRIMARY) { 81 ret = vtpci_init(RTE_ETH_DEV_TO_PCI(eth_dev), dev); 82 if (ret) { 83 PMD_INIT_LOG(ERR, "Failed to init PCI device\n"); 84 return -1; 85 } 86 } else { 87 ret = virtio_remap_pci(RTE_ETH_DEV_TO_PCI(eth_dev), dev); 88 if (ret < 0) { 89 PMD_INIT_LOG(ERR, "Failed to remap PCI device\n"); 90 return -1; 91 } 92 } 93 94 ret = eth_virtio_dev_init(eth_dev); 95 if (ret < 0) { 96 PMD_INIT_LOG(ERR, "Failed to init virtio device\n"); 97 goto err_unmap; 98 } 99 100 PMD_INIT_LOG(DEBUG, "port %d vendorID=0x%x deviceID=0x%x", 101 eth_dev->data->port_id, pci_dev->id.vendor_id, 102 pci_dev->id.device_id); 103 104 return 0; 105 106 err_unmap: 107 rte_pci_unmap_device(RTE_ETH_DEV_TO_PCI(eth_dev)); 108 if (hw->bus_type == VIRTIO_BUS_PCI_LEGACY) 109 rte_pci_ioport_unmap(VTPCI_IO(hw)); 110 111 return ret; 112 } 113 114 static int 115 eth_virtio_pci_uninit(struct rte_eth_dev *eth_dev) 116 { 117 int ret; 118 PMD_INIT_FUNC_TRACE(); 119 120 if (rte_eal_process_type() == RTE_PROC_SECONDARY) 121 return 0; 122 123 ret = virtio_dev_stop(eth_dev); 124 virtio_dev_close(eth_dev); 125 126 PMD_INIT_LOG(DEBUG, "dev_uninit completed"); 127 128 return ret; 129 } 130 131 static int vdpa_check_handler(__rte_unused const char *key, 132 const char *value, void *ret_val) 133 { 134 if (strcmp(value, "1") == 0) 135 *(int *)ret_val = 1; 136 else 137 *(int *)ret_val = 0; 138 139 return 0; 140 } 141 142 #define VIRTIO_ARG_VDPA "vdpa" 143 144 static int 145 virtio_pci_devargs_parse(struct rte_devargs *devargs, int *vdpa) 146 { 147 struct rte_kvargs *kvlist; 148 int ret = 0; 149 150 if (devargs == NULL) 151 return 0; 152 153 kvlist = rte_kvargs_parse(devargs->args, NULL); 154 if (kvlist == NULL) { 155 PMD_INIT_LOG(ERR, "error when parsing param"); 156 return 0; 157 } 158 159 if (rte_kvargs_count(kvlist, VIRTIO_ARG_VDPA) == 1) { 160 /* vdpa mode selected when there's a key-value pair: 161 * vdpa=1 162 */ 163 ret = rte_kvargs_process(kvlist, VIRTIO_ARG_VDPA, 164 vdpa_check_handler, vdpa); 165 if (ret < 0) 166 PMD_INIT_LOG(ERR, "Failed to parse %s", VIRTIO_ARG_VDPA); 167 } 168 169 rte_kvargs_free(kvlist); 170 171 return ret; 172 } 173 174 static int eth_virtio_pci_probe(struct rte_pci_driver *pci_drv __rte_unused, 175 struct rte_pci_device *pci_dev) 176 { 177 int vdpa = 0; 178 int ret = 0; 179 180 ret = virtio_pci_devargs_parse(pci_dev->device.devargs, &vdpa); 181 if (ret < 0) { 182 PMD_INIT_LOG(ERR, "devargs parsing is failed"); 183 return ret; 184 } 185 /* virtio pmd skips probe if device needs to work in vdpa mode */ 186 if (vdpa == 1) 187 return 1; 188 189 return rte_eth_dev_pci_generic_probe(pci_dev, sizeof(struct virtio_pci_dev), 190 eth_virtio_pci_init); 191 } 192 193 static int eth_virtio_pci_remove(struct rte_pci_device *pci_dev) 194 { 195 int ret; 196 197 ret = rte_eth_dev_pci_generic_remove(pci_dev, eth_virtio_pci_uninit); 198 /* Port has already been released by close. */ 199 if (ret == -ENODEV) 200 ret = 0; 201 return ret; 202 } 203 204 static struct rte_pci_driver rte_virtio_net_pci_pmd = { 205 .driver = { 206 .name = "net_virtio", 207 }, 208 .id_table = pci_id_virtio_map, 209 .drv_flags = 0, 210 .probe = eth_virtio_pci_probe, 211 .remove = eth_virtio_pci_remove, 212 }; 213 214 RTE_INIT(rte_virtio_net_pci_pmd_init) 215 { 216 rte_eal_iopl_init(); 217 rte_pci_register(&rte_virtio_net_pci_pmd); 218 } 219 220 RTE_PMD_REGISTER_PCI_TABLE(net_virtio, pci_id_virtio_map); 221 RTE_PMD_REGISTER_KMOD_DEP(net_virtio, "* igb_uio | uio_pci_generic | vfio-pci"); 222 RTE_PMD_EXPORT_NAME(net_virtio, __COUNTER__); 223