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         DPAA2_CMDIF_FUNC_TRACE();
  71
  72         RTE_SET_USED(count);
  73
  74         if (unlikely(!DPAA2_PER_LCORE_DPIO)) {
  75                 ret = dpaa2_affine_qbman_swp();
  76                 if (ret) {
  77                         DPAA2_CMDIF_ERR("Failure in affining portal\n");
  78                         return 0;
  79                 }
  80         }
  81         swp = DPAA2_PER_LCORE_PORTAL;
  82
  83         cmdif_send_cnxt = (struct rte_dpaa2_cmdif_context *)(context);
  84         txq = &(cidev->tx_queue[cmdif_send_cnxt->priority]);
  85
  86         /* Prepare enqueue descriptor */
  87         qbman_eq_desc_clear(&eqdesc);
  88         qbman_eq_desc_set_fq(&eqdesc, txq->fqid);
  89         qbman_eq_desc_set_no_orp(&eqdesc, 0);
  90         qbman_eq_desc_set_response(&eqdesc, 0, 0);
  91
  92         /* Set some of the FD parameters to i.
  93          * For performance reasons do not memset
  94          */
  95         fd.simple.bpid_offset = 0;
  96         fd.simple.ctrl = 0;
  97
  98         DPAA2_SET_FD_ADDR(&fd, DPAA2_VADDR_TO_IOVA(buffers[0]->buf_addr));
  99         DPAA2_SET_FD_LEN(&fd, cmdif_send_cnxt->size);
 100         DPAA2_SET_FD_FRC(&fd, cmdif_send_cnxt->frc);
 101         DPAA2_SET_FD_FLC(&fd, cmdif_send_cnxt->flc);
 102
 103         /* Enqueue a packet to the QBMAN */
 104         do {
 105                 ret = qbman_swp_enqueue_multiple(swp, &eqdesc, &fd, NULL, 1);
 106                 if (ret < 0 && ret != -EBUSY)
 107                         DPAA2_CMDIF_ERR("Transmit failure with err: %d\n", ret);
 108         } while (ret == -EBUSY);
 109
 110         DPAA2_CMDIF_DP_DEBUG("Successfully transmitted a packet\n");
 111
 112         return 0;
 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         DPAA2_CMDIF_FUNC_TRACE();
 132
 133         RTE_SET_USED(count);
 134
 135         if (unlikely(!DPAA2_PER_LCORE_DPIO)) {
 136                 ret = dpaa2_affine_qbman_swp();
 137                 if (ret) {
 138                         DPAA2_CMDIF_ERR("Failure in affining portal\n");
 139                         return 0;
 140                 }
 141         }
 142         swp = DPAA2_PER_LCORE_PORTAL;
 143
 144         cmdif_rcv_cnxt = (struct rte_dpaa2_cmdif_context *)(context);
 145         rxq = &(cidev->rx_queue[cmdif_rcv_cnxt->priority]);
 146         dq_storage = rxq->q_storage->dq_storage[0];
 147
 148         qbman_pull_desc_clear(&pulldesc);
 149         qbman_pull_desc_set_fq(&pulldesc, rxq->fqid);
 150         qbman_pull_desc_set_numframes(&pulldesc, 1);
 151         qbman_pull_desc_set_storage(&pulldesc, dq_storage,
 152                 (uint64_t)(DPAA2_VADDR_TO_IOVA(dq_storage)), 1);
 153
 154         while (1) {
 155                 if (qbman_swp_pull(swp, &pulldesc)) {
 156                         DPAA2_CMDIF_DP_WARN("VDQ cmd not issued. QBMAN is busy\n");
 157                         /* Portal was busy, try again */
 158                         continue;
 159                 }
 160                 break;
 161         }
 162
 163         /* Check if previous issued command is completed. */
 164         while (!qbman_check_command_complete(dq_storage))
 165                 ;
 166         /* Loop until the dq_storage is updated with new token by QBMAN */
 167         while (!qbman_result_has_new_result(swp, dq_storage))
 168                 ;
 169
 170         /* Check for valid frame. */
 171         status = (uint8_t)qbman_result_DQ_flags(dq_storage);
 172         if (unlikely((status & QBMAN_DQ_STAT_VALIDFRAME) == 0)) {
 173                 DPAA2_CMDIF_DP_DEBUG("No frame is delivered\n");
 174                 return 0;
 175         }
 176
 177         fd = qbman_result_DQ_fd(dq_storage);
 178
 179         buffers[0]->buf_addr = (void *)DPAA2_IOVA_TO_VADDR(
 180                         DPAA2_GET_FD_ADDR(fd) + DPAA2_GET_FD_OFFSET(fd));
 181         cmdif_rcv_cnxt->size = DPAA2_GET_FD_LEN(fd);
 182         cmdif_rcv_cnxt->flc = DPAA2_GET_FD_FLC(fd);
 183         cmdif_rcv_cnxt->frc = DPAA2_GET_FD_FRC(fd);
 184
 185         DPAA2_CMDIF_DP_DEBUG("packet received\n");
 186
 187         return 1;
 188 }
 189
 190 static const struct rte_rawdev_ops dpaa2_cmdif_ops = {
 191         .attr_get = dpaa2_cmdif_get_attr,
 192         .enqueue_bufs = dpaa2_cmdif_enqueue_bufs,
 193         .dequeue_bufs = dpaa2_cmdif_dequeue_bufs,
 194 };
 195
 196 static int
 197 dpaa2_cmdif_create(const char *name,
 198                    struct rte_vdev_device *vdev,
 199                    int socket_id)
 200 {
 201         struct rte_rawdev *rawdev;
 202         struct dpaa2_dpci_dev *cidev;
 203
 204         /* Allocate device structure */
 205         rawdev = rte_rawdev_pmd_allocate(name, sizeof(struct dpaa2_dpci_dev),
 206                                          socket_id);
 207         if (!rawdev) {
 208                 DPAA2_CMDIF_ERR("Unable to allocate rawdevice");
 209                 return -EINVAL;
 210         }
 211
 212         rawdev->dev_ops = &dpaa2_cmdif_ops;
 213         rawdev->device = &vdev->device;
 214         rawdev->driver_name = vdev->device.driver->name;
 215
 216         /* For secondary processes, the primary has done all the work */
 217         if (rte_eal_process_type() != RTE_PROC_PRIMARY)
 218                 return 0;
 219
 220         cidev = rte_dpaa2_alloc_dpci_dev();
 221         if (!cidev) {
 222                 DPAA2_CMDIF_ERR("Unable to allocate CI device");
 223                 rte_rawdev_pmd_release(rawdev);
 224                 return -ENODEV;
 225         }
 226
 227         rawdev->dev_private = cidev;
 228
 229         return 0;
 230 }
 231
 232 static int
 233 dpaa2_cmdif_destroy(const char *name)
 234 {
 235         int ret;
 236         struct rte_rawdev *rdev;
 237
 238         rdev = rte_rawdev_pmd_get_named_dev(name);
 239         if (!rdev) {
 240                 DPAA2_CMDIF_ERR("Invalid device name (%s)", name);
 241                 return -EINVAL;
 242         }
 243
 244         /* The primary process will only free the DPCI device */
 245         if (rte_eal_process_type() == RTE_PROC_PRIMARY)
 246                 rte_dpaa2_free_dpci_dev(rdev->dev_private);
 247
 248         ret = rte_rawdev_pmd_release(rdev);
 249         if (ret)
 250                 DPAA2_CMDIF_DEBUG("Device cleanup failed");
 251
 252         return 0;
 253 }
 254
 255 static int
 256 dpaa2_cmdif_probe(struct rte_vdev_device *vdev)
 257 {
 258         const char *name;
 259         int ret = 0;
 260
 261         name = rte_vdev_device_name(vdev);
 262
 263         DPAA2_CMDIF_INFO("Init %s on NUMA node %d", name, rte_socket_id());
 264
 265         ret = dpaa2_cmdif_create(name, vdev, rte_socket_id());
 266
 267         return ret;
 268 }
 269
 270 static int
 271 dpaa2_cmdif_remove(struct rte_vdev_device *vdev)
 272 {
 273         const char *name;
 274         int ret;
 275
 276         name = rte_vdev_device_name(vdev);
 277
 278         DPAA2_CMDIF_INFO("Closing %s on NUMA node %d", name, rte_socket_id());
 279
 280         ret = dpaa2_cmdif_destroy(name);
 281
 282         return ret;
 283 }
 284
 285 static struct rte_vdev_driver dpaa2_cmdif_drv = {
 286         .probe = dpaa2_cmdif_probe,
 287         .remove = dpaa2_cmdif_remove
 288 };
 289
 290 RTE_PMD_REGISTER_VDEV(DPAA2_CMDIF_PMD_NAME, dpaa2_cmdif_drv);
 291
 292 RTE_INIT(dpaa2_cmdif_init_log)
 293 {
 294         dpaa2_cmdif_logtype = rte_log_register("pmd.raw.dpaa2.cmdif");
 295         if (dpaa2_cmdif_logtype >= 0)
 296                 rte_log_set_level(dpaa2_cmdif_logtype, RTE_LOG_INFO);
 297 }