drivers/net/ice/ice_dcf.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2020 Intel Corporation
   3  */
   4
   5 #include <sys/queue.h>
   6 #include <stdio.h>
   7 #include <errno.h>
   8 #include <stdint.h>
   9 #include <string.h>
  10 #include <unistd.h>
  11 #include <stdarg.h>
  12 #include <inttypes.h>
  13 #include <rte_byteorder.h>
  14 #include <rte_common.h>
  15
  16 #include <rte_pci.h>
  17 #include <rte_atomic.h>
  18 #include <rte_eal.h>
  19 #include <rte_ether.h>
  20 #include <rte_ethdev_driver.h>
  21 #include <rte_ethdev_pci.h>
  22 #include <rte_malloc.h>
  23 #include <rte_memzone.h>
  24 #include <rte_dev.h>
  25
  26 #include "ice_dcf.h"
  27
  28 #define ICE_DCF_AQ_LEN     32
  29 #define ICE_DCF_AQ_BUF_SZ  4096
  30
  31 #define ICE_DCF_ARQ_MAX_RETRIES 200
  32 #define ICE_DCF_ARQ_CHECK_TIME  2   /* msecs */
  33
  34 #define ICE_DCF_VF_RES_BUF_SZ   \
  35         (sizeof(struct virtchnl_vf_resource) +  \
  36                 IAVF_MAX_VF_VSI * sizeof(struct virtchnl_vsi_resource))
  37
  38 static __rte_always_inline int
  39 ice_dcf_send_cmd_req_no_irq(struct ice_dcf_hw *hw, enum virtchnl_ops op,
  40                             uint8_t *req_msg, uint16_t req_msglen)
  41 {
  42         return iavf_aq_send_msg_to_pf(&hw->avf, op, IAVF_SUCCESS,
  43                                       req_msg, req_msglen, NULL);
  44 }
  45
  46 static int
  47 ice_dcf_recv_cmd_rsp_no_irq(struct ice_dcf_hw *hw, enum virtchnl_ops op,
  48                             uint8_t *rsp_msgbuf, uint16_t rsp_buflen,
  49                             uint16_t *rsp_msglen)
  50 {
  51         struct iavf_arq_event_info event;
  52         enum virtchnl_ops v_op;
  53         int i = 0;
  54         int err;
  55
  56         event.buf_len = rsp_buflen;
  57         event.msg_buf = rsp_msgbuf;
  58
  59         do {
  60                 err = iavf_clean_arq_element(&hw->avf, &event, NULL);
  61                 if (err != IAVF_SUCCESS)
  62                         goto again;
  63
  64                 v_op = rte_le_to_cpu_32(event.desc.cookie_high);
  65                 if (v_op != op)
  66                         goto again;
  67
  68                 if (rsp_msglen != NULL)
  69                         *rsp_msglen = event.msg_len;
  70                 return rte_le_to_cpu_32(event.desc.cookie_low);
  71
  72 again:
  73                 rte_delay_ms(ICE_DCF_ARQ_CHECK_TIME);
  74         } while (i++ < ICE_DCF_ARQ_MAX_RETRIES);
  75
  76         return -EIO;
  77 }
  78
  79 static __rte_always_inline void
  80 ice_dcf_aq_cmd_clear(struct ice_dcf_hw *hw, struct dcf_virtchnl_cmd *cmd)
  81 {
  82         rte_spinlock_lock(&hw->vc_cmd_queue_lock);
  83
  84         TAILQ_REMOVE(&hw->vc_cmd_queue, cmd, next);
  85
  86         rte_spinlock_unlock(&hw->vc_cmd_queue_lock);
  87 }
  88
  89 static __rte_always_inline void
  90 ice_dcf_vc_cmd_set(struct ice_dcf_hw *hw, struct dcf_virtchnl_cmd *cmd)
  91 {
  92         cmd->v_ret = IAVF_ERR_NOT_READY;
  93         cmd->rsp_msglen = 0;
  94         cmd->pending = 1;
  95
  96         rte_spinlock_lock(&hw->vc_cmd_queue_lock);
  97
  98         TAILQ_INSERT_TAIL(&hw->vc_cmd_queue, cmd, next);
  99
 100         rte_spinlock_unlock(&hw->vc_cmd_queue_lock);
 101 }
 102
 103 static __rte_always_inline int
 104 ice_dcf_vc_cmd_send(struct ice_dcf_hw *hw, struct dcf_virtchnl_cmd *cmd)
 105 {
 106         return iavf_aq_send_msg_to_pf(&hw->avf,
 107                                       cmd->v_op, IAVF_SUCCESS,
 108                                       cmd->req_msg, cmd->req_msglen, NULL);
 109 }
 110
 111 static __rte_always_inline void
 112 ice_dcf_aq_cmd_handle(struct ice_dcf_hw *hw, struct iavf_arq_event_info *info)
 113 {
 114         struct dcf_virtchnl_cmd *cmd;
 115         enum virtchnl_ops v_op;
 116         enum iavf_status v_ret;
 117         uint16_t aq_op;
 118
 119         aq_op = rte_le_to_cpu_16(info->desc.opcode);
 120         if (unlikely(aq_op != iavf_aqc_opc_send_msg_to_vf)) {
 121                 PMD_DRV_LOG(ERR,
 122                             "Request %u is not supported yet", aq_op);
 123                 return;
 124         }
 125
 126         v_op = rte_le_to_cpu_32(info->desc.cookie_high);
 127         if (unlikely(v_op == VIRTCHNL_OP_EVENT))
 128                 return;
 129
 130         v_ret = rte_le_to_cpu_32(info->desc.cookie_low);
 131
 132         rte_spinlock_lock(&hw->vc_cmd_queue_lock);
 133
 134         TAILQ_FOREACH(cmd, &hw->vc_cmd_queue, next) {
 135                 if (cmd->v_op == v_op && cmd->pending) {
 136                         cmd->v_ret = v_ret;
 137                         cmd->rsp_msglen = RTE_MIN(info->msg_len,
 138                                                   cmd->rsp_buflen);
 139                         if (likely(cmd->rsp_msglen != 0))
 140                                 rte_memcpy(cmd->rsp_msgbuf, info->msg_buf,
 141                                            cmd->rsp_msglen);
 142
 143                         /* prevent compiler reordering */
 144                         rte_compiler_barrier();
 145                         cmd->pending = 0;
 146                         break;
 147                 }
 148         }
 149
 150         rte_spinlock_unlock(&hw->vc_cmd_queue_lock);
 151 }
 152
 153 static void
 154 ice_dcf_handle_virtchnl_msg(struct ice_dcf_hw *hw)
 155 {
 156         struct iavf_arq_event_info info;
 157         uint16_t pending = 1;
 158         int ret;
 159
 160         info.buf_len = ICE_DCF_AQ_BUF_SZ;
 161         info.msg_buf = hw->arq_buf;
 162
 163         while (pending) {
 164                 ret = iavf_clean_arq_element(&hw->avf, &info, &pending);
 165                 if (ret != IAVF_SUCCESS)
 166                         break;
 167
 168                 ice_dcf_aq_cmd_handle(hw, &info);
 169         }
 170 }
 171
 172 static int
 173 ice_dcf_init_check_api_version(struct ice_dcf_hw *hw)
 174 {
 175 #define ICE_CPF_VIRTCHNL_VERSION_MAJOR_START    1
 176 #define ICE_CPF_VIRTCHNL_VERSION_MINOR_START    1
 177         struct virtchnl_version_info version, *pver;
 178         int err;
 179
 180         version.major = VIRTCHNL_VERSION_MAJOR;
 181         version.minor = VIRTCHNL_VERSION_MINOR;
 182         err = ice_dcf_send_cmd_req_no_irq(hw, VIRTCHNL_OP_VERSION,
 183                                           (uint8_t *)&version, sizeof(version));
 184         if (err) {
 185                 PMD_INIT_LOG(ERR, "Failed to send OP_VERSION");
 186                 return err;
 187         }
 188
 189         pver = &hw->virtchnl_version;
 190         err = ice_dcf_recv_cmd_rsp_no_irq(hw, VIRTCHNL_OP_VERSION,
 191                                           (uint8_t *)pver, sizeof(*pver), NULL);
 192         if (err) {
 193                 PMD_INIT_LOG(ERR, "Failed to get response of OP_VERSION");
 194                 return -1;
 195         }
 196
 197         PMD_INIT_LOG(DEBUG,
 198                      "Peer PF API version: %u.%u", pver->major, pver->minor);
 199
 200         if (pver->major < ICE_CPF_VIRTCHNL_VERSION_MAJOR_START ||
 201             (pver->major == ICE_CPF_VIRTCHNL_VERSION_MAJOR_START &&
 202              pver->minor < ICE_CPF_VIRTCHNL_VERSION_MINOR_START)) {
 203                 PMD_INIT_LOG(ERR,
 204                              "VIRTCHNL API version should not be lower than (%u.%u)",
 205                              ICE_CPF_VIRTCHNL_VERSION_MAJOR_START,
 206                              ICE_CPF_VIRTCHNL_VERSION_MAJOR_START);
 207                 return -1;
 208         } else if (pver->major > VIRTCHNL_VERSION_MAJOR ||
 209                    (pver->major == VIRTCHNL_VERSION_MAJOR &&
 210                     pver->minor > VIRTCHNL_VERSION_MINOR)) {
 211                 PMD_INIT_LOG(ERR,
 212                              "PF/VF API version mismatch:(%u.%u)-(%u.%u)",
 213                              pver->major, pver->minor,
 214                              VIRTCHNL_VERSION_MAJOR, VIRTCHNL_VERSION_MINOR);
 215                 return -1;
 216         }
 217
 218         PMD_INIT_LOG(DEBUG, "Peer is supported PF host");
 219
 220         return 0;
 221 }
 222
 223 static int
 224 ice_dcf_get_vf_resource(struct ice_dcf_hw *hw)
 225 {
 226         uint32_t caps;
 227         int err, i;
 228
 229         caps = VIRTCHNL_VF_OFFLOAD_WB_ON_ITR | VIRTCHNL_VF_OFFLOAD_RX_POLLING |
 230                VIRTCHNL_VF_CAP_ADV_LINK_SPEED |
 231                VF_BASE_MODE_OFFLOADS;
 232
 233         err = ice_dcf_send_cmd_req_no_irq(hw, VIRTCHNL_OP_GET_VF_RESOURCES,
 234                                           (uint8_t *)&caps, sizeof(caps));
 235         if (err) {
 236                 PMD_DRV_LOG(ERR, "Failed to send msg OP_GET_VF_RESOURCE");
 237                 return err;
 238         }
 239
 240         err = ice_dcf_recv_cmd_rsp_no_irq(hw, VIRTCHNL_OP_GET_VF_RESOURCES,
 241                                           (uint8_t *)hw->vf_res,
 242                                           ICE_DCF_VF_RES_BUF_SZ, NULL);
 243         if (err) {
 244                 PMD_DRV_LOG(ERR, "Failed to get response of OP_GET_VF_RESOURCE");
 245                 return -1;
 246         }
 247
 248         iavf_vf_parse_hw_config(&hw->avf, hw->vf_res);
 249
 250         hw->vsi_res = NULL;
 251         for (i = 0; i < hw->vf_res->num_vsis; i++) {
 252                 if (hw->vf_res->vsi_res[i].vsi_type == VIRTCHNL_VSI_SRIOV)
 253                         hw->vsi_res = &hw->vf_res->vsi_res[i];
 254         }
 255
 256         if (!hw->vsi_res) {
 257                 PMD_DRV_LOG(ERR, "no LAN VSI found");
 258                 return -1;
 259         }
 260
 261         hw->vsi_id = hw->vsi_res->vsi_id;
 262         PMD_DRV_LOG(DEBUG, "VSI ID is %u", hw->vsi_id);
 263
 264         return 0;
 265 }
 266
 267 static int
 268 ice_dcf_check_reset_done(struct ice_dcf_hw *hw)
 269 {
 270 #define ICE_DCF_RESET_WAIT_CNT       50
 271         struct iavf_hw *avf = &hw->avf;
 272         int i, reset;
 273
 274         for (i = 0; i < ICE_DCF_RESET_WAIT_CNT; i++) {
 275                 reset = IAVF_READ_REG(avf, IAVF_VFGEN_RSTAT) &
 276                                         IAVF_VFGEN_RSTAT_VFR_STATE_MASK;
 277                 reset = reset >> IAVF_VFGEN_RSTAT_VFR_STATE_SHIFT;
 278
 279                 if (reset == VIRTCHNL_VFR_VFACTIVE ||
 280                     reset == VIRTCHNL_VFR_COMPLETED)
 281                         break;
 282
 283                 rte_delay_ms(20);
 284         }
 285
 286         if (i >= ICE_DCF_RESET_WAIT_CNT)
 287                 return -1;
 288
 289         return 0;
 290 }
 291
 292 static inline void
 293 ice_dcf_enable_irq0(struct ice_dcf_hw *hw)
 294 {
 295         struct iavf_hw *avf = &hw->avf;
 296
 297         /* Enable admin queue interrupt trigger */
 298         IAVF_WRITE_REG(avf, IAVF_VFINT_ICR0_ENA1,
 299                        IAVF_VFINT_ICR0_ENA1_ADMINQ_MASK);
 300         IAVF_WRITE_REG(avf, IAVF_VFINT_DYN_CTL01,
 301                        IAVF_VFINT_DYN_CTL01_INTENA_MASK |
 302                        IAVF_VFINT_DYN_CTL01_CLEARPBA_MASK |
 303                        IAVF_VFINT_DYN_CTL01_ITR_INDX_MASK);
 304
 305         IAVF_WRITE_FLUSH(avf);
 306 }
 307
 308 static inline void
 309 ice_dcf_disable_irq0(struct ice_dcf_hw *hw)
 310 {
 311         struct iavf_hw *avf = &hw->avf;
 312
 313         /* Disable all interrupt types */
 314         IAVF_WRITE_REG(avf, IAVF_VFINT_ICR0_ENA1, 0);
 315         IAVF_WRITE_REG(avf, IAVF_VFINT_DYN_CTL01,
 316                        IAVF_VFINT_DYN_CTL01_ITR_INDX_MASK);
 317
 318         IAVF_WRITE_FLUSH(avf);
 319 }
 320
 321 static void
 322 ice_dcf_dev_interrupt_handler(void *param)
 323 {
 324         struct ice_dcf_hw *hw = param;
 325
 326         ice_dcf_disable_irq0(hw);
 327
 328         ice_dcf_handle_virtchnl_msg(hw);
 329
 330         ice_dcf_enable_irq0(hw);
 331 }
 332
 333 int
 334 ice_dcf_execute_virtchnl_cmd(struct ice_dcf_hw *hw,
 335                              struct dcf_virtchnl_cmd *cmd)
 336 {
 337         int i = 0;
 338         int err;
 339
 340         if ((cmd->req_msg && !cmd->req_msglen) ||
 341             (!cmd->req_msg && cmd->req_msglen) ||
 342             (cmd->rsp_msgbuf && !cmd->rsp_buflen) ||
 343             (!cmd->rsp_msgbuf && cmd->rsp_buflen))
 344                 return -EINVAL;
 345
 346         rte_spinlock_lock(&hw->vc_cmd_send_lock);
 347         ice_dcf_vc_cmd_set(hw, cmd);
 348
 349         err = ice_dcf_vc_cmd_send(hw, cmd);
 350         if (err) {
 351                 PMD_DRV_LOG(ERR, "fail to send cmd %d", cmd->v_op);
 352                 goto ret;
 353         }
 354
 355         do {
 356                 if (!cmd->pending)
 357                         break;
 358
 359                 rte_delay_ms(ICE_DCF_ARQ_CHECK_TIME);
 360         } while (i++ < ICE_DCF_ARQ_MAX_RETRIES);
 361
 362         if (cmd->v_ret != IAVF_SUCCESS) {
 363                 err = -1;
 364                 PMD_DRV_LOG(ERR,
 365                             "No response (%d times) or return failure (%d) for cmd %d",
 366                             i, cmd->v_ret, cmd->v_op);
 367         }
 368
 369 ret:
 370         ice_dcf_aq_cmd_clear(hw, cmd);
 371         rte_spinlock_unlock(&hw->vc_cmd_send_lock);
 372         return err;
 373 }
 374
 375 int
 376 ice_dcf_init_hw(struct rte_eth_dev *eth_dev, struct ice_dcf_hw *hw)
 377 {
 378         struct rte_pci_device *pci_dev = RTE_ETH_DEV_TO_PCI(eth_dev);
 379         int ret;
 380
 381         hw->avf.hw_addr = pci_dev->mem_resource[0].addr;
 382         hw->avf.back = hw;
 383
 384         hw->avf.bus.bus_id = pci_dev->addr.bus;
 385         hw->avf.bus.device = pci_dev->addr.devid;
 386         hw->avf.bus.func = pci_dev->addr.function;
 387
 388         hw->avf.device_id = pci_dev->id.device_id;
 389         hw->avf.vendor_id = pci_dev->id.vendor_id;
 390         hw->avf.subsystem_device_id = pci_dev->id.subsystem_device_id;
 391         hw->avf.subsystem_vendor_id = pci_dev->id.subsystem_vendor_id;
 392
 393         hw->avf.aq.num_arq_entries = ICE_DCF_AQ_LEN;
 394         hw->avf.aq.num_asq_entries = ICE_DCF_AQ_LEN;
 395         hw->avf.aq.arq_buf_size = ICE_DCF_AQ_BUF_SZ;
 396         hw->avf.aq.asq_buf_size = ICE_DCF_AQ_BUF_SZ;
 397
 398         rte_spinlock_init(&hw->vc_cmd_send_lock);
 399         rte_spinlock_init(&hw->vc_cmd_queue_lock);
 400         TAILQ_INIT(&hw->vc_cmd_queue);
 401
 402         hw->arq_buf = rte_zmalloc("arq_buf", ICE_DCF_AQ_BUF_SZ, 0);
 403         if (hw->arq_buf == NULL) {
 404                 PMD_INIT_LOG(ERR, "unable to allocate AdminQ buffer memory");
 405                 goto err;
 406         }
 407
 408         ret = iavf_set_mac_type(&hw->avf);
 409         if (ret) {
 410                 PMD_INIT_LOG(ERR, "set_mac_type failed: %d", ret);
 411                 goto err;
 412         }
 413
 414         ret = ice_dcf_check_reset_done(hw);
 415         if (ret) {
 416                 PMD_INIT_LOG(ERR, "VF is still resetting");
 417                 goto err;
 418         }
 419
 420         ret = iavf_init_adminq(&hw->avf);
 421         if (ret) {
 422                 PMD_INIT_LOG(ERR, "init_adminq failed: %d", ret);
 423                 goto err;
 424         }
 425
 426         if (ice_dcf_init_check_api_version(hw)) {
 427                 PMD_INIT_LOG(ERR, "check_api version failed");
 428                 goto err_api;
 429         }
 430
 431         hw->vf_res = rte_zmalloc("vf_res", ICE_DCF_VF_RES_BUF_SZ, 0);
 432         if (hw->vf_res == NULL) {
 433                 PMD_INIT_LOG(ERR, "unable to allocate vf_res memory");
 434                 goto err_api;
 435         }
 436
 437         if (ice_dcf_get_vf_resource(hw)) {
 438                 PMD_INIT_LOG(ERR, "Failed to get VF resource");
 439                 goto err_alloc;
 440         }
 441
 442         rte_intr_callback_register(&pci_dev->intr_handle,
 443                                    ice_dcf_dev_interrupt_handler, hw);
 444         rte_intr_enable(&pci_dev->intr_handle);
 445         ice_dcf_enable_irq0(hw);
 446
 447         return 0;
 448
 449 err_alloc:
 450         rte_free(hw->vf_res);
 451 err_api:
 452         iavf_shutdown_adminq(&hw->avf);
 453 err:
 454         rte_free(hw->arq_buf);
 455
 456         return -1;
 457 }
 458
 459 void
 460 ice_dcf_uninit_hw(struct rte_eth_dev *eth_dev, struct ice_dcf_hw *hw)
 461 {
 462         struct rte_pci_device *pci_dev = RTE_ETH_DEV_TO_PCI(eth_dev);
 463         struct rte_intr_handle *intr_handle = &pci_dev->intr_handle;
 464
 465         ice_dcf_disable_irq0(hw);
 466         rte_intr_disable(intr_handle);
 467         rte_intr_callback_unregister(intr_handle,
 468                                      ice_dcf_dev_interrupt_handler, hw);
 469
 470         iavf_shutdown_adminq(&hw->avf);
 471
 472         rte_free(hw->arq_buf);
 473         rte_free(hw->vf_res);
 474 }