1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright (C) 2021, Intel Corporation. */
3
4 /* Inter-Driver Communication */
5 #include "ice.h"
6 #include "ice_lib.h"
7 #include "ice_dcb_lib.h"
8
9 /**
10 * ice_get_auxiliary_drv - retrieve iidc_auxiliary_drv struct
11 * @pf: pointer to PF struct
12 *
13 * This function has to be called with a device_lock on the
14 * pf->adev.dev to avoid race conditions.
15 */
ice_get_auxiliary_drv(struct ice_pf * pf)16 static struct iidc_auxiliary_drv *ice_get_auxiliary_drv(struct ice_pf *pf)
17 {
18 struct auxiliary_device *adev;
19
20 adev = pf->adev;
21 if (!adev || !adev->dev.driver)
22 return NULL;
23
24 return container_of(adev->dev.driver, struct iidc_auxiliary_drv,
25 adrv.driver);
26 }
27
28 /**
29 * ice_send_event_to_aux - send event to RDMA AUX driver
30 * @pf: pointer to PF struct
31 * @event: event struct
32 */
ice_send_event_to_aux(struct ice_pf * pf,struct iidc_event * event)33 void ice_send_event_to_aux(struct ice_pf *pf, struct iidc_event *event)
34 {
35 struct iidc_auxiliary_drv *iadrv;
36
37 if (WARN_ON_ONCE(!in_task()))
38 return;
39
40 mutex_lock(&pf->adev_mutex);
41 if (!pf->adev)
42 goto finish;
43
44 device_lock(&pf->adev->dev);
45 iadrv = ice_get_auxiliary_drv(pf);
46 if (iadrv && iadrv->event_handler)
47 iadrv->event_handler(pf, event);
48 device_unlock(&pf->adev->dev);
49 finish:
50 mutex_unlock(&pf->adev_mutex);
51 }
52
53 /**
54 * ice_add_rdma_qset - Add Leaf Node for RDMA Qset
55 * @pf: PF struct
56 * @qset: Resource to be allocated
57 */
ice_add_rdma_qset(struct ice_pf * pf,struct iidc_rdma_qset_params * qset)58 int ice_add_rdma_qset(struct ice_pf *pf, struct iidc_rdma_qset_params *qset)
59 {
60 u16 max_rdmaqs[ICE_MAX_TRAFFIC_CLASS];
61 struct ice_vsi *vsi;
62 struct device *dev;
63 u32 qset_teid;
64 u16 qs_handle;
65 int status;
66 int i;
67
68 if (WARN_ON(!pf || !qset))
69 return -EINVAL;
70
71 dev = ice_pf_to_dev(pf);
72
73 if (!ice_is_rdma_ena(pf))
74 return -EINVAL;
75
76 vsi = ice_get_main_vsi(pf);
77 if (!vsi) {
78 dev_err(dev, "RDMA QSet invalid VSI\n");
79 return -EINVAL;
80 }
81
82 ice_for_each_traffic_class(i)
83 max_rdmaqs[i] = 0;
84
85 max_rdmaqs[qset->tc]++;
86 qs_handle = qset->qs_handle;
87
88 status = ice_cfg_vsi_rdma(vsi->port_info, vsi->idx, vsi->tc_cfg.ena_tc,
89 max_rdmaqs);
90 if (status) {
91 dev_err(dev, "Failed VSI RDMA Qset config\n");
92 return status;
93 }
94
95 status = ice_ena_vsi_rdma_qset(vsi->port_info, vsi->idx, qset->tc,
96 &qs_handle, 1, &qset_teid);
97 if (status) {
98 dev_err(dev, "Failed VSI RDMA Qset enable\n");
99 return status;
100 }
101 vsi->qset_handle[qset->tc] = qset->qs_handle;
102 qset->teid = qset_teid;
103
104 return 0;
105 }
106 EXPORT_SYMBOL_GPL(ice_add_rdma_qset);
107
108 /**
109 * ice_del_rdma_qset - Delete leaf node for RDMA Qset
110 * @pf: PF struct
111 * @qset: Resource to be freed
112 */
ice_del_rdma_qset(struct ice_pf * pf,struct iidc_rdma_qset_params * qset)113 int ice_del_rdma_qset(struct ice_pf *pf, struct iidc_rdma_qset_params *qset)
114 {
115 struct ice_vsi *vsi;
116 u32 teid;
117 u16 q_id;
118
119 if (WARN_ON(!pf || !qset))
120 return -EINVAL;
121
122 vsi = ice_find_vsi(pf, qset->vport_id);
123 if (!vsi) {
124 dev_err(ice_pf_to_dev(pf), "RDMA Invalid VSI\n");
125 return -EINVAL;
126 }
127
128 q_id = qset->qs_handle;
129 teid = qset->teid;
130
131 vsi->qset_handle[qset->tc] = 0;
132
133 return ice_dis_vsi_rdma_qset(vsi->port_info, 1, &teid, &q_id);
134 }
135 EXPORT_SYMBOL_GPL(ice_del_rdma_qset);
136
137 /**
138 * ice_rdma_request_reset - accept request from RDMA to perform a reset
139 * @pf: struct for PF
140 * @reset_type: type of reset
141 */
ice_rdma_request_reset(struct ice_pf * pf,enum iidc_reset_type reset_type)142 int ice_rdma_request_reset(struct ice_pf *pf, enum iidc_reset_type reset_type)
143 {
144 enum ice_reset_req reset;
145
146 if (WARN_ON(!pf))
147 return -EINVAL;
148
149 switch (reset_type) {
150 case IIDC_PFR:
151 reset = ICE_RESET_PFR;
152 break;
153 case IIDC_CORER:
154 reset = ICE_RESET_CORER;
155 break;
156 case IIDC_GLOBR:
157 reset = ICE_RESET_GLOBR;
158 break;
159 default:
160 dev_err(ice_pf_to_dev(pf), "incorrect reset request\n");
161 return -EINVAL;
162 }
163
164 return ice_schedule_reset(pf, reset);
165 }
166 EXPORT_SYMBOL_GPL(ice_rdma_request_reset);
167
168 /**
169 * ice_rdma_update_vsi_filter - update main VSI filters for RDMA
170 * @pf: pointer to struct for PF
171 * @vsi_id: VSI HW idx to update filter on
172 * @enable: bool whether to enable or disable filters
173 */
ice_rdma_update_vsi_filter(struct ice_pf * pf,u16 vsi_id,bool enable)174 int ice_rdma_update_vsi_filter(struct ice_pf *pf, u16 vsi_id, bool enable)
175 {
176 struct ice_vsi *vsi;
177 int status;
178
179 if (WARN_ON(!pf))
180 return -EINVAL;
181
182 vsi = ice_find_vsi(pf, vsi_id);
183 if (!vsi)
184 return -EINVAL;
185
186 status = ice_cfg_rdma_fltr(&pf->hw, vsi->idx, enable);
187 if (status) {
188 dev_err(ice_pf_to_dev(pf), "Failed to %sable RDMA filtering\n",
189 enable ? "en" : "dis");
190 } else {
191 if (enable)
192 vsi->info.q_opt_flags |= ICE_AQ_VSI_Q_OPT_PE_FLTR_EN;
193 else
194 vsi->info.q_opt_flags &= ~ICE_AQ_VSI_Q_OPT_PE_FLTR_EN;
195 }
196
197 return status;
198 }
199 EXPORT_SYMBOL_GPL(ice_rdma_update_vsi_filter);
200
201 /**
202 * ice_get_qos_params - parse QoS params for RDMA consumption
203 * @pf: pointer to PF struct
204 * @qos: set of QoS values
205 */
ice_get_qos_params(struct ice_pf * pf,struct iidc_qos_params * qos)206 void ice_get_qos_params(struct ice_pf *pf, struct iidc_qos_params *qos)
207 {
208 struct ice_dcbx_cfg *dcbx_cfg;
209 unsigned int i;
210 u32 up2tc;
211
212 dcbx_cfg = &pf->hw.port_info->qos_cfg.local_dcbx_cfg;
213 up2tc = rd32(&pf->hw, PRTDCB_TUP2TC);
214
215 qos->num_tc = ice_dcb_get_num_tc(dcbx_cfg);
216 for (i = 0; i < IIDC_MAX_USER_PRIORITY; i++)
217 qos->up2tc[i] = (up2tc >> (i * 3)) & 0x7;
218
219 for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++)
220 qos->tc_info[i].rel_bw = dcbx_cfg->etscfg.tcbwtable[i];
221
222 qos->pfc_mode = dcbx_cfg->pfc_mode;
223 if (qos->pfc_mode == IIDC_DSCP_PFC_MODE)
224 for (i = 0; i < IIDC_MAX_DSCP_MAPPING; i++)
225 qos->dscp_map[i] = dcbx_cfg->dscp_map[i];
226 }
227 EXPORT_SYMBOL_GPL(ice_get_qos_params);
228
229 /**
230 * ice_reserve_rdma_qvector - Reserve vector resources for RDMA driver
231 * @pf: board private structure to initialize
232 */
ice_reserve_rdma_qvector(struct ice_pf * pf)233 static int ice_reserve_rdma_qvector(struct ice_pf *pf)
234 {
235 if (ice_is_rdma_ena(pf)) {
236 int index;
237
238 index = ice_get_res(pf, pf->irq_tracker, pf->num_rdma_msix,
239 ICE_RES_RDMA_VEC_ID);
240 if (index < 0)
241 return index;
242 pf->num_avail_sw_msix -= pf->num_rdma_msix;
243 pf->rdma_base_vector = (u16)index;
244 }
245 return 0;
246 }
247
248 /**
249 * ice_adev_release - function to be mapped to AUX dev's release op
250 * @dev: pointer to device to free
251 */
ice_adev_release(struct device * dev)252 static void ice_adev_release(struct device *dev)
253 {
254 struct iidc_auxiliary_dev *iadev;
255
256 iadev = container_of(dev, struct iidc_auxiliary_dev, adev.dev);
257 kfree(iadev);
258 }
259
260 /**
261 * ice_plug_aux_dev - allocate and register AUX device
262 * @pf: pointer to pf struct
263 */
ice_plug_aux_dev(struct ice_pf * pf)264 int ice_plug_aux_dev(struct ice_pf *pf)
265 {
266 struct iidc_auxiliary_dev *iadev;
267 struct auxiliary_device *adev;
268 int ret;
269
270 /* if this PF doesn't support a technology that requires auxiliary
271 * devices, then gracefully exit
272 */
273 if (!ice_is_rdma_ena(pf))
274 return 0;
275
276 iadev = kzalloc(sizeof(*iadev), GFP_KERNEL);
277 if (!iadev)
278 return -ENOMEM;
279
280 adev = &iadev->adev;
281 iadev->pf = pf;
282
283 adev->id = pf->aux_idx;
284 adev->dev.release = ice_adev_release;
285 adev->dev.parent = &pf->pdev->dev;
286 adev->name = pf->rdma_mode & IIDC_RDMA_PROTOCOL_ROCEV2 ? "roce" : "iwarp";
287
288 ret = auxiliary_device_init(adev);
289 if (ret) {
290 kfree(iadev);
291 return ret;
292 }
293
294 ret = auxiliary_device_add(adev);
295 if (ret) {
296 auxiliary_device_uninit(adev);
297 return ret;
298 }
299
300 mutex_lock(&pf->adev_mutex);
301 pf->adev = adev;
302 mutex_unlock(&pf->adev_mutex);
303
304 return 0;
305 }
306
307 /* ice_unplug_aux_dev - unregister and free AUX device
308 * @pf: pointer to pf struct
309 */
ice_unplug_aux_dev(struct ice_pf * pf)310 void ice_unplug_aux_dev(struct ice_pf *pf)
311 {
312 struct auxiliary_device *adev;
313
314 mutex_lock(&pf->adev_mutex);
315 adev = pf->adev;
316 pf->adev = NULL;
317 mutex_unlock(&pf->adev_mutex);
318
319 if (adev) {
320 auxiliary_device_delete(adev);
321 auxiliary_device_uninit(adev);
322 }
323 }
324
325 /**
326 * ice_init_rdma - initializes PF for RDMA use
327 * @pf: ptr to ice_pf
328 */
ice_init_rdma(struct ice_pf * pf)329 int ice_init_rdma(struct ice_pf *pf)
330 {
331 struct device *dev = &pf->pdev->dev;
332 int ret;
333
334 /* Reserve vector resources */
335 ret = ice_reserve_rdma_qvector(pf);
336 if (ret < 0) {
337 dev_err(dev, "failed to reserve vectors for RDMA\n");
338 return ret;
339 }
340 pf->rdma_mode |= IIDC_RDMA_PROTOCOL_ROCEV2;
341 return ice_plug_aux_dev(pf);
342 }
343