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 */
idpf_remove(struct pci_dev * pdev)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 */
idpf_shutdown(struct pci_dev * pdev)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->vc_event_task);
93 idpf_vc_core_deinit(adapter);
94 idpf_deinit_dflt_mbx(adapter);
95
96 if (system_state == SYSTEM_POWER_OFF)
97 pci_set_power_state(pdev, PCI_D3hot);
98 }
99
100 /**
101 * idpf_cfg_hw - Initialize HW struct
102 * @adapter: adapter to setup hw struct for
103 *
104 * Returns 0 on success, negative on failure
105 */
idpf_cfg_hw(struct idpf_adapter * adapter)106 static int idpf_cfg_hw(struct idpf_adapter *adapter)
107 {
108 struct pci_dev *pdev = adapter->pdev;
109 struct idpf_hw *hw = &adapter->hw;
110
111 hw->hw_addr = pcim_iomap_table(pdev)[0];
112 if (!hw->hw_addr) {
113 pci_err(pdev, "failed to allocate PCI iomap table\n");
114
115 return -ENOMEM;
116 }
117
118 hw->back = adapter;
119
120 return 0;
121 }
122
123 /**
124 * idpf_probe - Device initialization routine
125 * @pdev: PCI device information struct
126 * @ent: entry in idpf_pci_tbl
127 *
128 * Returns 0 on success, negative on failure
129 */
idpf_probe(struct pci_dev * pdev,const struct pci_device_id * ent)130 static int idpf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
131 {
132 struct device *dev = &pdev->dev;
133 struct idpf_adapter *adapter;
134 int err;
135
136 adapter = kzalloc(sizeof(*adapter), GFP_KERNEL);
137 if (!adapter)
138 return -ENOMEM;
139
140 adapter->req_tx_splitq = true;
141 adapter->req_rx_splitq = true;
142
143 switch (ent->device) {
144 case IDPF_DEV_ID_PF:
145 idpf_dev_ops_init(adapter);
146 break;
147 case IDPF_DEV_ID_VF:
148 idpf_vf_dev_ops_init(adapter);
149 adapter->crc_enable = true;
150 break;
151 default:
152 err = -ENODEV;
153 dev_err(&pdev->dev, "Unexpected dev ID 0x%x in idpf probe\n",
154 ent->device);
155 goto err_free;
156 }
157
158 adapter->pdev = pdev;
159 err = pcim_enable_device(pdev);
160 if (err)
161 goto err_free;
162
163 err = pcim_iomap_regions(pdev, BIT(0), pci_name(pdev));
164 if (err) {
165 pci_err(pdev, "pcim_iomap_regions failed %pe\n", ERR_PTR(err));
166
167 goto err_free;
168 }
169
170 /* set up for high or low dma */
171 err = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64));
172 if (err) {
173 pci_err(pdev, "DMA configuration failed: %pe\n", ERR_PTR(err));
174
175 goto err_free;
176 }
177
178 pci_set_master(pdev);
179 pci_set_drvdata(pdev, adapter);
180
181 adapter->init_wq = alloc_workqueue("%s-%s-init",
182 WQ_UNBOUND | WQ_MEM_RECLAIM, 0,
183 dev_driver_string(dev),
184 dev_name(dev));
185 if (!adapter->init_wq) {
186 dev_err(dev, "Failed to allocate init workqueue\n");
187 err = -ENOMEM;
188 goto err_free;
189 }
190
191 adapter->serv_wq = alloc_workqueue("%s-%s-service",
192 WQ_UNBOUND | WQ_MEM_RECLAIM, 0,
193 dev_driver_string(dev),
194 dev_name(dev));
195 if (!adapter->serv_wq) {
196 dev_err(dev, "Failed to allocate service workqueue\n");
197 err = -ENOMEM;
198 goto err_serv_wq_alloc;
199 }
200
201 adapter->mbx_wq = alloc_workqueue("%s-%s-mbx",
202 WQ_UNBOUND | WQ_MEM_RECLAIM, 0,
203 dev_driver_string(dev),
204 dev_name(dev));
205 if (!adapter->mbx_wq) {
206 dev_err(dev, "Failed to allocate mailbox workqueue\n");
207 err = -ENOMEM;
208 goto err_mbx_wq_alloc;
209 }
210
211 adapter->stats_wq = alloc_workqueue("%s-%s-stats",
212 WQ_UNBOUND | WQ_MEM_RECLAIM, 0,
213 dev_driver_string(dev),
214 dev_name(dev));
215 if (!adapter->stats_wq) {
216 dev_err(dev, "Failed to allocate workqueue\n");
217 err = -ENOMEM;
218 goto err_stats_wq_alloc;
219 }
220
221 adapter->vc_event_wq = alloc_workqueue("%s-%s-vc_event",
222 WQ_UNBOUND | WQ_MEM_RECLAIM, 0,
223 dev_driver_string(dev),
224 dev_name(dev));
225 if (!adapter->vc_event_wq) {
226 dev_err(dev, "Failed to allocate virtchnl event workqueue\n");
227 err = -ENOMEM;
228 goto err_vc_event_wq_alloc;
229 }
230
231 /* setup msglvl */
232 adapter->msg_enable = netif_msg_init(-1, IDPF_AVAIL_NETIF_M);
233
234 err = idpf_cfg_hw(adapter);
235 if (err) {
236 dev_err(dev, "Failed to configure HW structure for adapter: %d\n",
237 err);
238 goto err_cfg_hw;
239 }
240
241 mutex_init(&adapter->vport_ctrl_lock);
242 mutex_init(&adapter->vector_lock);
243 mutex_init(&adapter->queue_lock);
244 mutex_init(&adapter->vc_buf_lock);
245
246 INIT_DELAYED_WORK(&adapter->init_task, idpf_init_task);
247 INIT_DELAYED_WORK(&adapter->serv_task, idpf_service_task);
248 INIT_DELAYED_WORK(&adapter->mbx_task, idpf_mbx_task);
249 INIT_DELAYED_WORK(&adapter->stats_task, idpf_statistics_task);
250 INIT_DELAYED_WORK(&adapter->vc_event_task, idpf_vc_event_task);
251
252 adapter->dev_ops.reg_ops.reset_reg_init(adapter);
253 set_bit(IDPF_HR_DRV_LOAD, adapter->flags);
254 queue_delayed_work(adapter->vc_event_wq, &adapter->vc_event_task,
255 msecs_to_jiffies(10 * (pdev->devfn & 0x07)));
256
257 return 0;
258
259 err_cfg_hw:
260 destroy_workqueue(adapter->vc_event_wq);
261 err_vc_event_wq_alloc:
262 destroy_workqueue(adapter->stats_wq);
263 err_stats_wq_alloc:
264 destroy_workqueue(adapter->mbx_wq);
265 err_mbx_wq_alloc:
266 destroy_workqueue(adapter->serv_wq);
267 err_serv_wq_alloc:
268 destroy_workqueue(adapter->init_wq);
269 err_free:
270 kfree(adapter);
271 return err;
272 }
273
274 /* idpf_pci_tbl - PCI Dev idpf ID Table
275 */
276 static const struct pci_device_id idpf_pci_tbl[] = {
277 { PCI_VDEVICE(INTEL, IDPF_DEV_ID_PF)},
278 { PCI_VDEVICE(INTEL, IDPF_DEV_ID_VF)},
279 { /* Sentinel */ }
280 };
281 MODULE_DEVICE_TABLE(pci, idpf_pci_tbl);
282
283 static struct pci_driver idpf_driver = {
284 .name = KBUILD_MODNAME,
285 .id_table = idpf_pci_tbl,
286 .probe = idpf_probe,
287 .sriov_configure = idpf_sriov_configure,
288 .remove = idpf_remove,
289 .shutdown = idpf_shutdown,
290 };
291 module_pci_driver(idpf_driver);
292