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