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 static DEFINE_XARRAY_ALLOC1(ice_aux_id); 10 11 /** 12 * ice_get_auxiliary_drv - retrieve iidc_auxiliary_drv struct 13 * @pf: pointer to PF struct 14 * 15 * This function has to be called with a device_lock on the 16 * pf->adev.dev to avoid race conditions. 17 */ 18 static struct iidc_auxiliary_drv *ice_get_auxiliary_drv(struct ice_pf *pf) 19 { 20 struct auxiliary_device *adev; 21 22 adev = pf->adev; 23 if (!adev || !adev->dev.driver) 24 return NULL; 25 26 return container_of(adev->dev.driver, struct iidc_auxiliary_drv, 27 adrv.driver); 28 } 29 30 /** 31 * ice_send_event_to_aux - send event to RDMA AUX driver 32 * @pf: pointer to PF struct 33 * @event: event struct 34 */ 35 void ice_send_event_to_aux(struct ice_pf *pf, struct iidc_event *event) 36 { 37 struct iidc_auxiliary_drv *iadrv; 38 39 if (WARN_ON_ONCE(!in_task())) 40 return; 41 42 mutex_lock(&pf->adev_mutex); 43 if (!pf->adev) 44 goto finish; 45 46 device_lock(&pf->adev->dev); 47 iadrv = ice_get_auxiliary_drv(pf); 48 if (iadrv && iadrv->event_handler) 49 iadrv->event_handler(pf, event); 50 device_unlock(&pf->adev->dev); 51 finish: 52 mutex_unlock(&pf->adev_mutex); 53 } 54 55 /** 56 * ice_add_rdma_qset - Add Leaf Node for RDMA Qset 57 * @pf: PF struct 58 * @qset: Resource to be allocated 59 */ 60 int ice_add_rdma_qset(struct ice_pf *pf, struct iidc_rdma_qset_params *qset) 61 { 62 u16 max_rdmaqs[ICE_MAX_TRAFFIC_CLASS]; 63 struct ice_vsi *vsi; 64 struct device *dev; 65 u32 qset_teid; 66 u16 qs_handle; 67 int status; 68 int i; 69 70 if (WARN_ON(!pf || !qset)) 71 return -EINVAL; 72 73 dev = ice_pf_to_dev(pf); 74 75 if (!ice_is_rdma_ena(pf)) 76 return -EINVAL; 77 78 vsi = ice_get_main_vsi(pf); 79 if (!vsi) { 80 dev_err(dev, "RDMA QSet invalid VSI\n"); 81 return -EINVAL; 82 } 83 84 ice_for_each_traffic_class(i) 85 max_rdmaqs[i] = 0; 86 87 max_rdmaqs[qset->tc]++; 88 qs_handle = qset->qs_handle; 89 90 status = ice_cfg_vsi_rdma(vsi->port_info, vsi->idx, vsi->tc_cfg.ena_tc, 91 max_rdmaqs); 92 if (status) { 93 dev_err(dev, "Failed VSI RDMA Qset config\n"); 94 return status; 95 } 96 97 status = ice_ena_vsi_rdma_qset(vsi->port_info, vsi->idx, qset->tc, 98 &qs_handle, 1, &qset_teid); 99 if (status) { 100 dev_err(dev, "Failed VSI RDMA Qset enable\n"); 101 return status; 102 } 103 vsi->qset_handle[qset->tc] = qset->qs_handle; 104 qset->teid = qset_teid; 105 106 return 0; 107 } 108 EXPORT_SYMBOL_GPL(ice_add_rdma_qset); 109 110 /** 111 * ice_del_rdma_qset - Delete leaf node for RDMA Qset 112 * @pf: PF struct 113 * @qset: Resource to be freed 114 */ 115 int ice_del_rdma_qset(struct ice_pf *pf, struct iidc_rdma_qset_params *qset) 116 { 117 struct ice_vsi *vsi; 118 u32 teid; 119 u16 q_id; 120 121 if (WARN_ON(!pf || !qset)) 122 return -EINVAL; 123 124 vsi = ice_find_vsi(pf, qset->vport_id); 125 if (!vsi) { 126 dev_err(ice_pf_to_dev(pf), "RDMA Invalid VSI\n"); 127 return -EINVAL; 128 } 129 130 q_id = qset->qs_handle; 131 teid = qset->teid; 132 133 vsi->qset_handle[qset->tc] = 0; 134 135 return ice_dis_vsi_rdma_qset(vsi->port_info, 1, &teid, &q_id); 136 } 137 EXPORT_SYMBOL_GPL(ice_del_rdma_qset); 138 139 /** 140 * ice_rdma_request_reset - accept request from RDMA to perform a reset 141 * @pf: struct for PF 142 * @reset_type: type of reset 143 */ 144 int ice_rdma_request_reset(struct ice_pf *pf, enum iidc_reset_type reset_type) 145 { 146 enum ice_reset_req reset; 147 148 if (WARN_ON(!pf)) 149 return -EINVAL; 150 151 switch (reset_type) { 152 case IIDC_PFR: 153 reset = ICE_RESET_PFR; 154 break; 155 case IIDC_CORER: 156 reset = ICE_RESET_CORER; 157 break; 158 case IIDC_GLOBR: 159 reset = ICE_RESET_GLOBR; 160 break; 161 default: 162 dev_err(ice_pf_to_dev(pf), "incorrect reset request\n"); 163 return -EINVAL; 164 } 165 166 return ice_schedule_reset(pf, reset); 167 } 168 EXPORT_SYMBOL_GPL(ice_rdma_request_reset); 169 170 /** 171 * ice_rdma_update_vsi_filter - update main VSI filters for RDMA 172 * @pf: pointer to struct for PF 173 * @vsi_id: VSI HW idx to update filter on 174 * @enable: bool whether to enable or disable filters 175 */ 176 int ice_rdma_update_vsi_filter(struct ice_pf *pf, u16 vsi_id, bool enable) 177 { 178 struct ice_vsi *vsi; 179 int status; 180 181 if (WARN_ON(!pf)) 182 return -EINVAL; 183 184 vsi = ice_find_vsi(pf, vsi_id); 185 if (!vsi) 186 return -EINVAL; 187 188 status = ice_cfg_rdma_fltr(&pf->hw, vsi->idx, enable); 189 if (status) { 190 dev_err(ice_pf_to_dev(pf), "Failed to %sable RDMA filtering\n", 191 enable ? "en" : "dis"); 192 } else { 193 if (enable) 194 vsi->info.q_opt_flags |= ICE_AQ_VSI_Q_OPT_PE_FLTR_EN; 195 else 196 vsi->info.q_opt_flags &= ~ICE_AQ_VSI_Q_OPT_PE_FLTR_EN; 197 } 198 199 return status; 200 } 201 EXPORT_SYMBOL_GPL(ice_rdma_update_vsi_filter); 202 203 /** 204 * ice_get_qos_params - parse QoS params for RDMA consumption 205 * @pf: pointer to PF struct 206 * @qos: set of QoS values 207 */ 208 void ice_get_qos_params(struct ice_pf *pf, struct iidc_qos_params *qos) 209 { 210 struct ice_dcbx_cfg *dcbx_cfg; 211 unsigned int i; 212 u32 up2tc; 213 214 dcbx_cfg = &pf->hw.port_info->qos_cfg.local_dcbx_cfg; 215 up2tc = rd32(&pf->hw, PRTDCB_TUP2TC); 216 217 qos->num_tc = ice_dcb_get_num_tc(dcbx_cfg); 218 for (i = 0; i < IIDC_MAX_USER_PRIORITY; i++) 219 qos->up2tc[i] = (up2tc >> (i * 3)) & 0x7; 220 221 for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++) 222 qos->tc_info[i].rel_bw = dcbx_cfg->etscfg.tcbwtable[i]; 223 224 qos->pfc_mode = dcbx_cfg->pfc_mode; 225 if (qos->pfc_mode == IIDC_DSCP_PFC_MODE) 226 for (i = 0; i < IIDC_MAX_DSCP_MAPPING; i++) 227 qos->dscp_map[i] = dcbx_cfg->dscp_map[i]; 228 } 229 EXPORT_SYMBOL_GPL(ice_get_qos_params); 230 231 /** 232 * ice_reserve_rdma_qvector - Reserve vector resources for RDMA driver 233 * @pf: board private structure to initialize 234 */ 235 static int ice_reserve_rdma_qvector(struct ice_pf *pf) 236 { 237 if (ice_is_rdma_ena(pf)) { 238 int index; 239 240 index = ice_get_res(pf, pf->irq_tracker, pf->num_rdma_msix, 241 ICE_RES_RDMA_VEC_ID); 242 if (index < 0) 243 return index; 244 pf->num_avail_sw_msix -= pf->num_rdma_msix; 245 pf->rdma_base_vector = (u16)index; 246 } 247 return 0; 248 } 249 250 /** 251 * ice_free_rdma_qvector - free vector resources reserved for RDMA driver 252 * @pf: board private structure to initialize 253 */ 254 static void ice_free_rdma_qvector(struct ice_pf *pf) 255 { 256 pf->num_avail_sw_msix -= pf->num_rdma_msix; 257 ice_free_res(pf->irq_tracker, pf->rdma_base_vector, 258 ICE_RES_RDMA_VEC_ID); 259 } 260 261 /** 262 * ice_adev_release - function to be mapped to AUX dev's release op 263 * @dev: pointer to device to free 264 */ 265 static void ice_adev_release(struct device *dev) 266 { 267 struct iidc_auxiliary_dev *iadev; 268 269 iadev = container_of(dev, struct iidc_auxiliary_dev, adev.dev); 270 kfree(iadev); 271 } 272 273 /** 274 * ice_plug_aux_dev - allocate and register AUX device 275 * @pf: pointer to pf struct 276 */ 277 int ice_plug_aux_dev(struct ice_pf *pf) 278 { 279 struct iidc_auxiliary_dev *iadev; 280 struct auxiliary_device *adev; 281 int ret; 282 283 /* if this PF doesn't support a technology that requires auxiliary 284 * devices, then gracefully exit 285 */ 286 if (!ice_is_rdma_ena(pf)) 287 return 0; 288 289 iadev = kzalloc(sizeof(*iadev), GFP_KERNEL); 290 if (!iadev) 291 return -ENOMEM; 292 293 adev = &iadev->adev; 294 iadev->pf = pf; 295 296 adev->id = pf->aux_idx; 297 adev->dev.release = ice_adev_release; 298 adev->dev.parent = &pf->pdev->dev; 299 adev->name = pf->rdma_mode & IIDC_RDMA_PROTOCOL_ROCEV2 ? "roce" : "iwarp"; 300 301 ret = auxiliary_device_init(adev); 302 if (ret) { 303 kfree(iadev); 304 return ret; 305 } 306 307 ret = auxiliary_device_add(adev); 308 if (ret) { 309 auxiliary_device_uninit(adev); 310 return ret; 311 } 312 313 mutex_lock(&pf->adev_mutex); 314 pf->adev = adev; 315 mutex_unlock(&pf->adev_mutex); 316 317 return 0; 318 } 319 320 /* ice_unplug_aux_dev - unregister and free AUX device 321 * @pf: pointer to pf struct 322 */ 323 void ice_unplug_aux_dev(struct ice_pf *pf) 324 { 325 struct auxiliary_device *adev; 326 327 mutex_lock(&pf->adev_mutex); 328 adev = pf->adev; 329 pf->adev = NULL; 330 mutex_unlock(&pf->adev_mutex); 331 332 if (adev) { 333 auxiliary_device_delete(adev); 334 auxiliary_device_uninit(adev); 335 } 336 } 337 338 /** 339 * ice_init_rdma - initializes PF for RDMA use 340 * @pf: ptr to ice_pf 341 */ 342 int ice_init_rdma(struct ice_pf *pf) 343 { 344 struct device *dev = &pf->pdev->dev; 345 int ret; 346 347 if (!ice_is_rdma_ena(pf)) { 348 dev_warn(dev, "RDMA is not supported on this device\n"); 349 return 0; 350 } 351 352 ret = xa_alloc(&ice_aux_id, &pf->aux_idx, NULL, XA_LIMIT(1, INT_MAX), 353 GFP_KERNEL); 354 if (ret) { 355 dev_err(dev, "Failed to allocate device ID for AUX driver\n"); 356 return -ENOMEM; 357 } 358 359 /* Reserve vector resources */ 360 ret = ice_reserve_rdma_qvector(pf); 361 if (ret < 0) { 362 dev_err(dev, "failed to reserve vectors for RDMA\n"); 363 goto err_reserve_rdma_qvector; 364 } 365 pf->rdma_mode |= IIDC_RDMA_PROTOCOL_ROCEV2; 366 ret = ice_plug_aux_dev(pf); 367 if (ret) 368 goto err_plug_aux_dev; 369 return 0; 370 371 err_plug_aux_dev: 372 ice_free_rdma_qvector(pf); 373 err_reserve_rdma_qvector: 374 pf->adev = NULL; 375 xa_erase(&ice_aux_id, pf->aux_idx); 376 return ret; 377 } 378 379 /** 380 * ice_deinit_rdma - deinitialize RDMA on PF 381 * @pf: ptr to ice_pf 382 */ 383 void ice_deinit_rdma(struct ice_pf *pf) 384 { 385 if (!ice_is_rdma_ena(pf)) 386 return; 387 388 ice_unplug_aux_dev(pf); 389 ice_free_rdma_qvector(pf); 390 xa_erase(&ice_aux_id, pf->aux_idx); 391 } 392