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