drivers/net/ethernet/intel/ice/ice_idc.c

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