drivers/event/dpaa2/dpaa2_hw_dpcon.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  *
   3  *   Copyright 2017 NXP
   4  *
   5  */
   6
   7 #include <unistd.h>
   8 #include <stdio.h>
   9 #include <sys/types.h>
  10 #include <string.h>
  11 #include <stdlib.h>
  12 #include <fcntl.h>
  13 #include <errno.h>
  14
  15 #include <rte_malloc.h>
  16 #include <rte_memcpy.h>
  17 #include <rte_string_fns.h>
  18 #include <rte_cycles.h>
  19 #include <rte_kvargs.h>
  20 #include <rte_dev.h>
  21 #include <rte_ethdev_driver.h>
  22
  23 #include <rte_fslmc.h>
  24 #include <mc/fsl_dpcon.h>
  25 #include <portal/dpaa2_hw_pvt.h>
  26 #include "dpaa2_eventdev.h"
  27 #include "dpaa2_eventdev_logs.h"
  28
  29 TAILQ_HEAD(dpcon_dev_list, dpaa2_dpcon_dev);
  30 static struct dpcon_dev_list dpcon_dev_list
  31         = TAILQ_HEAD_INITIALIZER(dpcon_dev_list); /*!< DPCON device list */
  32
  33 static int
  34 rte_dpaa2_create_dpcon_device(int dev_fd __rte_unused,
  35                               struct vfio_device_info *obj_info __rte_unused,
  36                               int dpcon_id)
  37 {
  38         struct dpaa2_dpcon_dev *dpcon_node;
  39         struct dpcon_attr attr;
  40         int ret;
  41
  42         /* Allocate DPAA2 dpcon handle */
  43         dpcon_node = rte_malloc(NULL, sizeof(struct dpaa2_dpcon_dev), 0);
  44         if (!dpcon_node) {
  45                 DPAA2_EVENTDEV_ERR(
  46                                 "Memory allocation failed for dpcon device");
  47                 return -1;
  48         }
  49
  50         /* Open the dpcon object */
  51         dpcon_node->dpcon.regs = rte_mcp_ptr_list[MC_PORTAL_INDEX];
  52         ret = dpcon_open(&dpcon_node->dpcon,
  53                          CMD_PRI_LOW, dpcon_id, &dpcon_node->token);
  54         if (ret) {
  55                 DPAA2_EVENTDEV_ERR("Unable to open dpcon device: err(%d)",
  56                                    ret);
  57                 rte_free(dpcon_node);
  58                 return -1;
  59         }
  60
  61         /* Get the device attributes */
  62         ret = dpcon_get_attributes(&dpcon_node->dpcon,
  63                                    CMD_PRI_LOW, dpcon_node->token, &attr);
  64         if (ret != 0) {
  65                 DPAA2_EVENTDEV_ERR("dpcon attribute fetch failed: err(%d)",
  66                                    ret);
  67                 rte_free(dpcon_node);
  68                 return -1;
  69         }
  70
  71         /* Updating device specific private information*/
  72         dpcon_node->qbman_ch_id = attr.qbman_ch_id;
  73         dpcon_node->num_priorities = attr.num_priorities;
  74         dpcon_node->dpcon_id = dpcon_id;
  75         rte_atomic16_init(&dpcon_node->in_use);
  76
  77         TAILQ_INSERT_TAIL(&dpcon_dev_list, dpcon_node, next);
  78
  79         return 0;
  80 }
  81
  82 struct dpaa2_dpcon_dev *rte_dpaa2_alloc_dpcon_dev(void)
  83 {
  84         struct dpaa2_dpcon_dev *dpcon_dev = NULL;
  85
  86         /* Get DPCON dev handle from list using index */
  87         TAILQ_FOREACH(dpcon_dev, &dpcon_dev_list, next) {
  88                 if (dpcon_dev && rte_atomic16_test_and_set(&dpcon_dev->in_use))
  89                         break;
  90         }
  91
  92         return dpcon_dev;
  93 }
  94
  95 void rte_dpaa2_free_dpcon_dev(struct dpaa2_dpcon_dev *dpcon)
  96 {
  97         struct dpaa2_dpcon_dev *dpcon_dev = NULL;
  98
  99         /* Match DPCON handle and mark it free */
 100         TAILQ_FOREACH(dpcon_dev, &dpcon_dev_list, next) {
 101                 if (dpcon_dev == dpcon) {
 102                         rte_atomic16_dec(&dpcon_dev->in_use);
 103                         return;
 104                 }
 105         }
 106 }
 107
 108 static struct rte_dpaa2_object rte_dpaa2_dpcon_obj = {
 109         .dev_type = DPAA2_CON,
 110         .create = rte_dpaa2_create_dpcon_device,
 111 };
 112
 113 RTE_PMD_REGISTER_DPAA2_OBJECT(dpcon, rte_dpaa2_dpcon_obj);