1 // SPDX-License-Identifier: GPL-2.0-only 2 /* Copyright (C) 2023 Intel Corporation */ 3 4 #include "idpf.h" 5 #include "idpf_devids.h" 6 #include "idpf_virtchnl.h" 7 8 #define DRV_SUMMARY "Intel(R) Infrastructure Data Path Function Linux Driver" 9 10 MODULE_DESCRIPTION(DRV_SUMMARY); 11 MODULE_IMPORT_NS("LIBETH"); 12 MODULE_IMPORT_NS("LIBETH_XDP"); 13 MODULE_LICENSE("GPL"); 14 15 /** 16 * idpf_remove - Device removal routine 17 * @pdev: PCI device information struct 18 */ 19 static void idpf_remove(struct pci_dev *pdev) 20 { 21 struct idpf_adapter *adapter = pci_get_drvdata(pdev); 22 int i; 23 24 set_bit(IDPF_REMOVE_IN_PROG, adapter->flags); 25 26 /* Wait until vc_event_task is done to consider if any hard reset is 27 * in progress else we may go ahead and release the resources but the 28 * thread doing the hard reset might continue the init path and 29 * end up in bad state. 30 */ 31 cancel_delayed_work_sync(&adapter->vc_event_task); 32 if (adapter->num_vfs) 33 idpf_sriov_configure(pdev, 0); 34 35 idpf_vc_core_deinit(adapter); 36 37 /* Be a good citizen and leave the device clean on exit */ 38 adapter->dev_ops.reg_ops.trigger_reset(adapter, IDPF_HR_FUNC_RESET); 39 idpf_deinit_dflt_mbx(adapter); 40 41 if (!adapter->netdevs) 42 goto destroy_wqs; 43 44 /* There are some cases where it's possible to still have netdevs 45 * registered with the stack at this point, e.g. if the driver detected 46 * a HW reset and rmmod is called before it fully recovers. Unregister 47 * any stale netdevs here. 48 */ 49 for (i = 0; i < adapter->max_vports; i++) { 50 if (!adapter->netdevs[i]) 51 continue; 52 if (adapter->netdevs[i]->reg_state != NETREG_UNINITIALIZED) 53 unregister_netdev(adapter->netdevs[i]); 54 free_netdev(adapter->netdevs[i]); 55 adapter->netdevs[i] = NULL; 56 } 57 58 destroy_wqs: 59 destroy_workqueue(adapter->init_wq); 60 destroy_workqueue(adapter->serv_wq); 61 destroy_workqueue(adapter->mbx_wq); 62 destroy_workqueue(adapter->stats_wq); 63 destroy_workqueue(adapter->vc_event_wq); 64 65 for (i = 0; i < adapter->max_vports; i++) { 66 kfree(adapter->vport_config[i]->user_config.q_coalesce); 67 kfree(adapter->vport_config[i]); 68 adapter->vport_config[i] = NULL; 69 } 70 kfree(adapter->vport_config); 71 adapter->vport_config = NULL; 72 kfree(adapter->netdevs); 73 adapter->netdevs = NULL; 74 kfree(adapter->vcxn_mngr); 75 adapter->vcxn_mngr = NULL; 76 77 mutex_destroy(&adapter->vport_ctrl_lock); 78 mutex_destroy(&adapter->vector_lock); 79 mutex_destroy(&adapter->queue_lock); 80 mutex_destroy(&adapter->vc_buf_lock); 81 82 pci_set_drvdata(pdev, NULL); 83 kfree(adapter); 84 } 85 86 /** 87 * idpf_shutdown - PCI callback for shutting down device 88 * @pdev: PCI device information struct 89 */ 90 static void idpf_shutdown(struct pci_dev *pdev) 91 { 92 struct idpf_adapter *adapter = pci_get_drvdata(pdev); 93 94 cancel_delayed_work_sync(&adapter->serv_task); 95 cancel_delayed_work_sync(&adapter->vc_event_task); 96 idpf_vc_core_deinit(adapter); 97 idpf_deinit_dflt_mbx(adapter); 98 99 if (system_state == SYSTEM_POWER_OFF) 100 pci_set_power_state(pdev, PCI_D3hot); 101 } 102 103 /** 104 * idpf_cfg_hw - Initialize HW struct 105 * @adapter: adapter to setup hw struct for 106 * 107 * Returns 0 on success, negative on failure 108 */ 109 static int idpf_cfg_hw(struct idpf_adapter *adapter) 110 { 111 resource_size_t res_start, mbx_start, rstat_start; 112 struct pci_dev *pdev = adapter->pdev; 113 struct idpf_hw *hw = &adapter->hw; 114 struct device *dev = &pdev->dev; 115 long len; 116 117 res_start = pci_resource_start(pdev, 0); 118 119 /* Map mailbox space for virtchnl communication */ 120 mbx_start = res_start + adapter->dev_ops.static_reg_info[0].start; 121 len = resource_size(&adapter->dev_ops.static_reg_info[0]); 122 hw->mbx.vaddr = devm_ioremap(dev, mbx_start, len); 123 if (!hw->mbx.vaddr) { 124 pci_err(pdev, "failed to allocate BAR0 mbx region\n"); 125 126 return -ENOMEM; 127 } 128 hw->mbx.addr_start = adapter->dev_ops.static_reg_info[0].start; 129 hw->mbx.addr_len = len; 130 131 /* Map rstat space for resets */ 132 rstat_start = res_start + adapter->dev_ops.static_reg_info[1].start; 133 len = resource_size(&adapter->dev_ops.static_reg_info[1]); 134 hw->rstat.vaddr = devm_ioremap(dev, rstat_start, len); 135 if (!hw->rstat.vaddr) { 136 pci_err(pdev, "failed to allocate BAR0 rstat region\n"); 137 138 return -ENOMEM; 139 } 140 hw->rstat.addr_start = adapter->dev_ops.static_reg_info[1].start; 141 hw->rstat.addr_len = len; 142 143 hw->back = adapter; 144 145 return 0; 146 } 147 148 /** 149 * idpf_probe - Device initialization routine 150 * @pdev: PCI device information struct 151 * @ent: entry in idpf_pci_tbl 152 * 153 * Returns 0 on success, negative on failure 154 */ 155 static int idpf_probe(struct pci_dev *pdev, const struct pci_device_id *ent) 156 { 157 struct device *dev = &pdev->dev; 158 struct idpf_adapter *adapter; 159 int err; 160 161 adapter = kzalloc(sizeof(*adapter), GFP_KERNEL); 162 if (!adapter) 163 return -ENOMEM; 164 165 adapter->req_tx_splitq = true; 166 adapter->req_rx_splitq = true; 167 168 switch (ent->device) { 169 case IDPF_DEV_ID_PF: 170 idpf_dev_ops_init(adapter); 171 break; 172 case IDPF_DEV_ID_VF: 173 idpf_vf_dev_ops_init(adapter); 174 adapter->crc_enable = true; 175 break; 176 default: 177 err = -ENODEV; 178 dev_err(&pdev->dev, "Unexpected dev ID 0x%x in idpf probe\n", 179 ent->device); 180 goto err_free; 181 } 182 183 adapter->pdev = pdev; 184 err = pcim_enable_device(pdev); 185 if (err) 186 goto err_free; 187 188 err = pcim_request_region(pdev, 0, pci_name(pdev)); 189 if (err) { 190 pci_err(pdev, "pcim_request_region failed %pe\n", ERR_PTR(err)); 191 192 goto err_free; 193 } 194 195 err = pci_enable_ptm(pdev, NULL); 196 if (err) 197 pci_dbg(pdev, "PCIe PTM is not supported by PCIe bus/controller\n"); 198 199 /* set up for high or low dma */ 200 err = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64)); 201 if (err) { 202 pci_err(pdev, "DMA configuration failed: %pe\n", ERR_PTR(err)); 203 204 goto err_free; 205 } 206 207 pci_set_master(pdev); 208 pci_set_drvdata(pdev, adapter); 209 210 adapter->init_wq = alloc_workqueue("%s-%s-init", 211 WQ_UNBOUND | WQ_MEM_RECLAIM, 0, 212 dev_driver_string(dev), 213 dev_name(dev)); 214 if (!adapter->init_wq) { 215 dev_err(dev, "Failed to allocate init workqueue\n"); 216 err = -ENOMEM; 217 goto err_free; 218 } 219 220 adapter->serv_wq = alloc_workqueue("%s-%s-service", 221 WQ_UNBOUND | WQ_MEM_RECLAIM, 0, 222 dev_driver_string(dev), 223 dev_name(dev)); 224 if (!adapter->serv_wq) { 225 dev_err(dev, "Failed to allocate service workqueue\n"); 226 err = -ENOMEM; 227 goto err_serv_wq_alloc; 228 } 229 230 adapter->mbx_wq = alloc_workqueue("%s-%s-mbx", WQ_UNBOUND | WQ_HIGHPRI, 231 0, dev_driver_string(dev), 232 dev_name(dev)); 233 if (!adapter->mbx_wq) { 234 dev_err(dev, "Failed to allocate mailbox workqueue\n"); 235 err = -ENOMEM; 236 goto err_mbx_wq_alloc; 237 } 238 239 adapter->stats_wq = alloc_workqueue("%s-%s-stats", 240 WQ_UNBOUND | WQ_MEM_RECLAIM, 0, 241 dev_driver_string(dev), 242 dev_name(dev)); 243 if (!adapter->stats_wq) { 244 dev_err(dev, "Failed to allocate workqueue\n"); 245 err = -ENOMEM; 246 goto err_stats_wq_alloc; 247 } 248 249 adapter->vc_event_wq = alloc_workqueue("%s-%s-vc_event", 250 WQ_UNBOUND | WQ_MEM_RECLAIM, 0, 251 dev_driver_string(dev), 252 dev_name(dev)); 253 if (!adapter->vc_event_wq) { 254 dev_err(dev, "Failed to allocate virtchnl event workqueue\n"); 255 err = -ENOMEM; 256 goto err_vc_event_wq_alloc; 257 } 258 259 /* setup msglvl */ 260 adapter->msg_enable = netif_msg_init(-1, IDPF_AVAIL_NETIF_M); 261 262 err = idpf_cfg_hw(adapter); 263 if (err) { 264 dev_err(dev, "Failed to configure HW structure for adapter: %d\n", 265 err); 266 goto err_cfg_hw; 267 } 268 269 mutex_init(&adapter->vport_ctrl_lock); 270 mutex_init(&adapter->vector_lock); 271 mutex_init(&adapter->queue_lock); 272 mutex_init(&adapter->vc_buf_lock); 273 274 INIT_DELAYED_WORK(&adapter->init_task, idpf_init_task); 275 INIT_DELAYED_WORK(&adapter->serv_task, idpf_service_task); 276 INIT_DELAYED_WORK(&adapter->mbx_task, idpf_mbx_task); 277 INIT_DELAYED_WORK(&adapter->stats_task, idpf_statistics_task); 278 INIT_DELAYED_WORK(&adapter->vc_event_task, idpf_vc_event_task); 279 280 adapter->dev_ops.reg_ops.reset_reg_init(adapter); 281 set_bit(IDPF_HR_DRV_LOAD, adapter->flags); 282 queue_delayed_work(adapter->vc_event_wq, &adapter->vc_event_task, 283 msecs_to_jiffies(10 * (pdev->devfn & 0x07))); 284 285 return 0; 286 287 err_cfg_hw: 288 destroy_workqueue(adapter->vc_event_wq); 289 err_vc_event_wq_alloc: 290 destroy_workqueue(adapter->stats_wq); 291 err_stats_wq_alloc: 292 destroy_workqueue(adapter->mbx_wq); 293 err_mbx_wq_alloc: 294 destroy_workqueue(adapter->serv_wq); 295 err_serv_wq_alloc: 296 destroy_workqueue(adapter->init_wq); 297 err_free: 298 kfree(adapter); 299 return err; 300 } 301 302 /* idpf_pci_tbl - PCI Dev idpf ID Table 303 */ 304 static const struct pci_device_id idpf_pci_tbl[] = { 305 { PCI_VDEVICE(INTEL, IDPF_DEV_ID_PF)}, 306 { PCI_VDEVICE(INTEL, IDPF_DEV_ID_VF)}, 307 { /* Sentinel */ } 308 }; 309 MODULE_DEVICE_TABLE(pci, idpf_pci_tbl); 310 311 static struct pci_driver idpf_driver = { 312 .name = KBUILD_MODNAME, 313 .id_table = idpf_pci_tbl, 314 .probe = idpf_probe, 315 .sriov_configure = idpf_sriov_configure, 316 .remove = idpf_remove, 317 .shutdown = idpf_shutdown, 318 }; 319 module_pci_driver(idpf_driver); 320