drivers/event/dpaa2/dpaa2_hw_dpcon.c

   1 /*-
   2  *   BSD LICENSE
   3  *
   4  *   Copyright 2017 NXP.
   5  *
   6  *   Redistribution and use in source and binary forms, with or without
   7  *   modification, are permitted provided that the following conditions
   8  *   are met:
   9  *
  10  *     * Redistributions of source code must retain the above copyright
  11  *       notice, this list of conditions and the following disclaimer.
  12  *     * Redistributions in binary form must reproduce the above copyright
  13  *       notice, this list of conditions and the following disclaimer in
  14  *       the documentation and/or other materials provided with the
  15  *       distribution.
  16  *     * Neither the name of NXP nor the names of its
  17  *       contributors may be used to endorse or promote products derived
  18  *       from this software without specific prior written permission.
  19  *
  20  *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  21  *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  22  *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  23  *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  24  *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  25  *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  26  *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  27  *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  28  *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  29  *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  30  *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  31  */
  32
  33 #include <unistd.h>
  34 #include <stdio.h>
  35 #include <sys/types.h>
  36 #include <string.h>
  37 #include <stdlib.h>
  38 #include <fcntl.h>
  39 #include <errno.h>
  40
  41 #include <rte_malloc.h>
  42 #include <rte_memcpy.h>
  43 #include <rte_string_fns.h>
  44 #include <rte_cycles.h>
  45 #include <rte_kvargs.h>
  46 #include <rte_dev.h>
  47 #include <rte_ethdev.h>
  48
  49 #include <fslmc_vfio.h>
  50 #include <mc/fsl_dpcon.h>
  51 #include <portal/dpaa2_hw_pvt.h>
  52 #include "dpaa2_eventdev.h"
  53
  54 TAILQ_HEAD(dpcon_dev_list, dpaa2_dpcon_dev);
  55 static struct dpcon_dev_list dpcon_dev_list
  56         = TAILQ_HEAD_INITIALIZER(dpcon_dev_list); /*!< DPCON device list */
  57
  58 static int
  59 rte_dpaa2_create_dpcon_device(struct fslmc_vfio_device *vdev __rte_unused,
  60                               struct vfio_device_info *obj_info __rte_unused,
  61                          int dpcon_id)
  62 {
  63         struct dpaa2_dpcon_dev *dpcon_node;
  64         struct dpcon_attr attr;
  65         int ret;
  66
  67         /* Allocate DPAA2 dpcon handle */
  68         dpcon_node = rte_malloc(NULL, sizeof(struct dpaa2_dpcon_dev), 0);
  69         if (!dpcon_node) {
  70                 PMD_DRV_LOG(ERR, "Memory allocation failed for DPCON Device");
  71                 return -1;
  72         }
  73
  74         /* Open the dpcon object */
  75         dpcon_node->dpcon.regs = rte_mcp_ptr_list[MC_PORTAL_INDEX];
  76         ret = dpcon_open(&dpcon_node->dpcon,
  77                          CMD_PRI_LOW, dpcon_id, &dpcon_node->token);
  78         if (ret) {
  79                 PMD_DRV_LOG(ERR, "Resource alloc failure with err code: %d",
  80                             ret);
  81                 rte_free(dpcon_node);
  82                 return -1;
  83         }
  84
  85         /* Get the device attributes */
  86         ret = dpcon_get_attributes(&dpcon_node->dpcon,
  87                                    CMD_PRI_LOW, dpcon_node->token, &attr);
  88         if (ret != 0) {
  89                 PMD_DRV_LOG(ERR, "Reading device failed with err code: %d",
  90                             ret);
  91                 rte_free(dpcon_node);
  92                 return -1;
  93         }
  94
  95         /* Updating device specific private information*/
  96         dpcon_node->qbman_ch_id = attr.qbman_ch_id;
  97         dpcon_node->num_priorities = attr.num_priorities;
  98         dpcon_node->dpcon_id = dpcon_id;
  99         rte_atomic16_init(&dpcon_node->in_use);
 100
 101         TAILQ_INSERT_TAIL(&dpcon_dev_list, dpcon_node, next);
 102
 103         PMD_DRV_LOG(DEBUG, "DPAA2: Added [dpcon.%d]", dpcon_id);
 104
 105         return 0;
 106 }
 107
 108 struct dpaa2_dpcon_dev *rte_dpaa2_alloc_dpcon_dev(void)
 109 {
 110         struct dpaa2_dpcon_dev *dpcon_dev = NULL;
 111
 112         /* Get DPCON dev handle from list using index */
 113         TAILQ_FOREACH(dpcon_dev, &dpcon_dev_list, next) {
 114                 if (dpcon_dev && rte_atomic16_test_and_set(&dpcon_dev->in_use))
 115                         break;
 116         }
 117
 118         return dpcon_dev;
 119 }
 120
 121 void rte_dpaa2_free_dpcon_dev(struct dpaa2_dpcon_dev *dpcon)
 122 {
 123         struct dpaa2_dpcon_dev *dpcon_dev = NULL;
 124
 125         /* Match DPCON handle and mark it free */
 126         TAILQ_FOREACH(dpcon_dev, &dpcon_dev_list, next) {
 127                 if (dpcon_dev == dpcon) {
 128                         rte_atomic16_dec(&dpcon_dev->in_use);
 129                         return;
 130                 }
 131         }
 132 }
 133
 134 static struct rte_dpaa2_object rte_dpaa2_dpcon_obj = {
 135         .object_id = DPAA2_MC_DPCON_DEVID,
 136         .create = rte_dpaa2_create_dpcon_device,
 137 };
 138
 139 RTE_PMD_REGISTER_DPAA2_OBJECT(dpcon, rte_dpaa2_dpcon_obj);