drivers/raw/ioat/ioat_common.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2020 Intel Corporation
   3  */
   4
   5 #include <rte_rawdev_pmd.h>
   6 #include <rte_memzone.h>
   7 #include <rte_common.h>
   8
   9 #include "ioat_private.h"
  10
  11 int
  12 idxd_rawdev_close(struct rte_rawdev *dev __rte_unused)
  13 {
  14         return 0;
  15 }
  16
  17 int
  18 idxd_rawdev_create(const char *name, struct rte_device *dev,
  19                    const struct idxd_rawdev *base_idxd,
  20                    const struct rte_rawdev_ops *ops)
  21 {
  22         struct idxd_rawdev *idxd;
  23         struct rte_rawdev *rawdev = NULL;
  24         const struct rte_memzone *mz = NULL;
  25         char mz_name[RTE_MEMZONE_NAMESIZE];
  26         int ret = 0;
  27
  28         if (!name) {
  29                 IOAT_PMD_ERR("Invalid name of the device!");
  30                 ret = -EINVAL;
  31                 goto cleanup;
  32         }
  33
  34         /* Allocate device structure */
  35         rawdev = rte_rawdev_pmd_allocate(name, sizeof(struct idxd_rawdev),
  36                                          dev->numa_node);
  37         if (rawdev == NULL) {
  38                 IOAT_PMD_ERR("Unable to allocate raw device");
  39                 ret = -ENOMEM;
  40                 goto cleanup;
  41         }
  42
  43         snprintf(mz_name, sizeof(mz_name), "rawdev%u_private", rawdev->dev_id);
  44         mz = rte_memzone_reserve(mz_name, sizeof(struct idxd_rawdev),
  45                         dev->numa_node, RTE_MEMZONE_IOVA_CONTIG);
  46         if (mz == NULL) {
  47                 IOAT_PMD_ERR("Unable to reserve memzone for private data\n");
  48                 ret = -ENOMEM;
  49                 goto cleanup;
  50         }
  51         rawdev->dev_private = mz->addr;
  52         rawdev->dev_ops = ops;
  53         rawdev->device = dev;
  54         rawdev->driver_name = IOAT_PMD_RAWDEV_NAME_STR;
  55
  56         idxd = rawdev->dev_private;
  57         *idxd = *base_idxd; /* copy over the main fields already passed in */
  58         idxd->rawdev = rawdev;
  59         idxd->mz = mz;
  60
  61         return 0;
  62
  63 cleanup:
  64         if (rawdev)
  65                 rte_rawdev_pmd_release(rawdev);
  66
  67         return ret;
  68 }