drivers/raw/dpaa2_cmdif/dpaa2_cmdif.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright 2018-2019 NXP
   3  */
   4
   5 #include <stdio.h>
   6 #include <errno.h>
   7 #include <stdint.h>
   8
   9 #include <rte_bus_vdev.h>
  10 #include <rte_atomic.h>
  11 #include <rte_interrupts.h>
  12 #include <rte_branch_prediction.h>
  13 #include <rte_lcore.h>
  14
  15 #include <rte_rawdev.h>
  16 #include <rte_rawdev_pmd.h>
  17
  18 #include <portal/dpaa2_hw_pvt.h>
  19 #include <portal/dpaa2_hw_dpio.h>
  20 #include "dpaa2_cmdif_logs.h"
  21 #include "rte_pmd_dpaa2_cmdif.h"
  22
  23 /* Dynamic log type identifier */
  24 int dpaa2_cmdif_logtype;
  25
  26 /* CMDIF driver name */
  27 #define DPAA2_CMDIF_PMD_NAME dpaa2_dpci
  28
  29 /*
  30  * This API provides the DPCI device ID in 'attr_value'.
  31  * The device ID shall be passed by GPP to the AIOP using CMDIF commands.
  32  */
  33 static int
  34 dpaa2_cmdif_get_attr(struct rte_rawdev *dev,
  35                      const char *attr_name,
  36                      uint64_t *attr_value)
  37 {
  38         struct dpaa2_dpci_dev *cidev = dev->dev_private;
  39
  40         DPAA2_CMDIF_FUNC_TRACE();
  41
  42         RTE_SET_USED(attr_name);
  43
  44         if (!attr_value) {
  45                 DPAA2_CMDIF_ERR("Invalid arguments for getting attributes");
  46                 return -EINVAL;
  47         }
  48         *attr_value = cidev->dpci_id;
  49
  50         return 0;
  51 }
  52
  53 static int
  54 dpaa2_cmdif_enqueue_bufs(struct rte_rawdev *dev,
  55                          struct rte_rawdev_buf **buffers,
  56                          unsigned int count,
  57                          rte_rawdev_obj_t context)
  58 {
  59         struct dpaa2_dpci_dev *cidev = dev->dev_private;
  60         struct rte_dpaa2_cmdif_context *cmdif_send_cnxt;
  61         struct dpaa2_queue *txq;
  62         struct qbman_fd fd;
  63         struct qbman_eq_desc eqdesc;
  64         struct qbman_swp *swp;
  65         uint32_t retry_count = 0;
  66         int ret;
  67
  68         RTE_SET_USED(count);
  69
  70         if (unlikely(!DPAA2_PER_LCORE_DPIO)) {
  71                 ret = dpaa2_affine_qbman_swp();
  72                 if (ret) {
  73                         DPAA2_CMDIF_ERR("Failure in affining portal\n");
  74                         return 0;
  75                 }
  76         }
  77         swp = DPAA2_PER_LCORE_PORTAL;
  78
  79         cmdif_send_cnxt = (struct rte_dpaa2_cmdif_context *)(context);
  80         txq = &(cidev->tx_queue[cmdif_send_cnxt->priority]);
  81
  82         /* Prepare enqueue descriptor */
  83         qbman_eq_desc_clear(&eqdesc);
  84         qbman_eq_desc_set_fq(&eqdesc, txq->fqid);
  85         qbman_eq_desc_set_no_orp(&eqdesc, 0);
  86         qbman_eq_desc_set_response(&eqdesc, 0, 0);
  87
  88         /* Set some of the FD parameters to i.
  89          * For performance reasons do not memset
  90          */
  91         fd.simple.bpid_offset = 0;
  92         fd.simple.ctrl = 0;
  93
  94         DPAA2_SET_FD_ADDR(&fd, DPAA2_VADDR_TO_IOVA(buffers[0]->buf_addr));
  95         DPAA2_SET_FD_LEN(&fd, cmdif_send_cnxt->size);
  96         DPAA2_SET_FD_FRC(&fd, cmdif_send_cnxt->frc);
  97         DPAA2_SET_FD_FLC(&fd, cmdif_send_cnxt->flc);
  98
  99         /* Enqueue a packet to the QBMAN */
 100         do {
 101                 ret = qbman_swp_enqueue_multiple(swp, &eqdesc, &fd, NULL, 1);
 102                 if (ret < 0 && ret != -EBUSY)
 103                         DPAA2_CMDIF_ERR("Transmit failure with err: %d\n", ret);
 104                 retry_count++;
 105         } while ((ret == -EBUSY) && (retry_count < DPAA2_MAX_TX_RETRY_COUNT));
 106
 107         if (ret < 0)
 108                 return ret;
 109
 110         DPAA2_CMDIF_DP_DEBUG("Successfully transmitted a packet\n");
 111
 112         return 1;
 113 }
 114
 115 static int
 116 dpaa2_cmdif_dequeue_bufs(struct rte_rawdev *dev,
 117                          struct rte_rawdev_buf **buffers,
 118                          unsigned int count,
 119                          rte_rawdev_obj_t context)
 120 {
 121         struct dpaa2_dpci_dev *cidev = dev->dev_private;
 122         struct rte_dpaa2_cmdif_context *cmdif_rcv_cnxt;
 123         struct dpaa2_queue *rxq;
 124         struct qbman_swp *swp;
 125         struct qbman_result *dq_storage;
 126         const struct qbman_fd *fd;
 127         struct qbman_pull_desc pulldesc;
 128         uint8_t status;
 129         int ret;
 130
 131         RTE_SET_USED(count);
 132
 133         if (unlikely(!DPAA2_PER_LCORE_DPIO)) {
 134                 ret = dpaa2_affine_qbman_swp();
 135                 if (ret) {
 136                         DPAA2_CMDIF_ERR("Failure in affining portal\n");
 137                         return 0;
 138                 }
 139         }
 140         swp = DPAA2_PER_LCORE_PORTAL;
 141
 142         cmdif_rcv_cnxt = (struct rte_dpaa2_cmdif_context *)(context);
 143         rxq = &(cidev->rx_queue[cmdif_rcv_cnxt->priority]);
 144         dq_storage = rxq->q_storage->dq_storage[0];
 145
 146         qbman_pull_desc_clear(&pulldesc);
 147         qbman_pull_desc_set_fq(&pulldesc, rxq->fqid);
 148         qbman_pull_desc_set_numframes(&pulldesc, 1);
 149         qbman_pull_desc_set_storage(&pulldesc, dq_storage,
 150                 (uint64_t)(DPAA2_VADDR_TO_IOVA(dq_storage)), 1);
 151
 152         while (1) {
 153                 if (qbman_swp_pull(swp, &pulldesc)) {
 154                         DPAA2_CMDIF_DP_WARN("VDQ cmd not issued. QBMAN is busy\n");
 155                         /* Portal was busy, try again */
 156                         continue;
 157                 }
 158                 break;
 159         }
 160
 161         /* Check if previous issued command is completed. */
 162         while (!qbman_check_command_complete(dq_storage))
 163                 ;
 164         /* Loop until the dq_storage is updated with new token by QBMAN */
 165         while (!qbman_result_has_new_result(swp, dq_storage))
 166                 ;
 167
 168         /* Check for valid frame. */
 169         status = (uint8_t)qbman_result_DQ_flags(dq_storage);
 170         if (unlikely((status & QBMAN_DQ_STAT_VALIDFRAME) == 0)) {
 171                 DPAA2_CMDIF_DP_DEBUG("No frame is delivered\n");
 172                 return 0;
 173         }
 174
 175         fd = qbman_result_DQ_fd(dq_storage);
 176
 177         buffers[0]->buf_addr = (void *)DPAA2_IOVA_TO_VADDR(
 178                         DPAA2_GET_FD_ADDR(fd) + DPAA2_GET_FD_OFFSET(fd));
 179         cmdif_rcv_cnxt->size = DPAA2_GET_FD_LEN(fd);
 180         cmdif_rcv_cnxt->flc = DPAA2_GET_FD_FLC(fd);
 181         cmdif_rcv_cnxt->frc = DPAA2_GET_FD_FRC(fd);
 182
 183         DPAA2_CMDIF_DP_DEBUG("packet received\n");
 184
 185         return 1;
 186 }
 187
 188 static const struct rte_rawdev_ops dpaa2_cmdif_ops = {
 189         .attr_get = dpaa2_cmdif_get_attr,
 190         .enqueue_bufs = dpaa2_cmdif_enqueue_bufs,
 191         .dequeue_bufs = dpaa2_cmdif_dequeue_bufs,
 192 };
 193
 194 static int
 195 dpaa2_cmdif_create(const char *name,
 196                    struct rte_vdev_device *vdev,
 197                    int socket_id)
 198 {
 199         struct rte_rawdev *rawdev;
 200         struct dpaa2_dpci_dev *cidev;
 201
 202         /* Allocate device structure */
 203         rawdev = rte_rawdev_pmd_allocate(name, sizeof(struct dpaa2_dpci_dev),
 204                                          socket_id);
 205         if (!rawdev) {
 206                 DPAA2_CMDIF_ERR("Unable to allocate rawdevice");
 207                 return -EINVAL;
 208         }
 209
 210         rawdev->dev_ops = &dpaa2_cmdif_ops;
 211         rawdev->device = &vdev->device;
 212
 213         /* For secondary processes, the primary has done all the work */
 214         if (rte_eal_process_type() != RTE_PROC_PRIMARY)
 215                 return 0;
 216
 217         cidev = rte_dpaa2_alloc_dpci_dev();
 218         if (!cidev) {
 219                 DPAA2_CMDIF_ERR("Unable to allocate CI device");
 220                 rte_rawdev_pmd_release(rawdev);
 221                 return -ENODEV;
 222         }
 223
 224         rawdev->dev_private = cidev;
 225
 226         return 0;
 227 }
 228
 229 static int
 230 dpaa2_cmdif_destroy(const char *name)
 231 {
 232         int ret;
 233         struct rte_rawdev *rdev;
 234
 235         rdev = rte_rawdev_pmd_get_named_dev(name);
 236         if (!rdev) {
 237                 DPAA2_CMDIF_ERR("Invalid device name (%s)", name);
 238                 return -EINVAL;
 239         }
 240
 241         /* The primary process will only free the DPCI device */
 242         if (rte_eal_process_type() == RTE_PROC_PRIMARY)
 243                 rte_dpaa2_free_dpci_dev(rdev->dev_private);
 244
 245         ret = rte_rawdev_pmd_release(rdev);
 246         if (ret)
 247                 DPAA2_CMDIF_DEBUG("Device cleanup failed");
 248
 249         return 0;
 250 }
 251
 252 static int
 253 dpaa2_cmdif_probe(struct rte_vdev_device *vdev)
 254 {
 255         const char *name;
 256         int ret = 0;
 257
 258         name = rte_vdev_device_name(vdev);
 259
 260         DPAA2_CMDIF_INFO("Init %s on NUMA node %d", name, rte_socket_id());
 261
 262         ret = dpaa2_cmdif_create(name, vdev, rte_socket_id());
 263
 264         return ret;
 265 }
 266
 267 static int
 268 dpaa2_cmdif_remove(struct rte_vdev_device *vdev)
 269 {
 270         const char *name;
 271         int ret;
 272
 273         name = rte_vdev_device_name(vdev);
 274         if (name == NULL)
 275                 return -1;
 276
 277         DPAA2_CMDIF_INFO("Closing %s on NUMA node %d", name, rte_socket_id());
 278
 279         ret = dpaa2_cmdif_destroy(name);
 280
 281         return ret;
 282 }
 283
 284 static struct rte_vdev_driver dpaa2_cmdif_drv = {
 285         .probe = dpaa2_cmdif_probe,
 286         .remove = dpaa2_cmdif_remove
 287 };
 288
 289 RTE_PMD_REGISTER_VDEV(DPAA2_CMDIF_PMD_NAME, dpaa2_cmdif_drv);
 290
 291 RTE_INIT(dpaa2_cmdif_init_log)
 292 {
 293         dpaa2_cmdif_logtype = rte_log_register("pmd.raw.dpaa2.cmdif");
 294         if (dpaa2_cmdif_logtype >= 0)
 295                 rte_log_set_level(dpaa2_cmdif_logtype, RTE_LOG_INFO);
 296 }