drivers/raw/dpaa2_cmdif/dpaa2_cmdif.c

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