drivers/bus/fslmc/portal/dpaa2_hw_dpbp.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  *
   3  *   Copyright (c) 2016 Freescale Semiconductor, Inc. All rights reserved.
   4  *   Copyright 2016 NXP
   5  *
   6  */
   7
   8 #include <unistd.h>
   9 #include <stdio.h>
  10 #include <sys/types.h>
  11 #include <string.h>
  12 #include <stdlib.h>
  13 #include <fcntl.h>
  14 #include <errno.h>
  15
  16 #include <rte_malloc.h>
  17 #include <rte_memcpy.h>
  18 #include <rte_string_fns.h>
  19 #include <rte_cycles.h>
  20 #include <rte_kvargs.h>
  21 #include <rte_dev.h>
  22 #include <rte_ethdev_driver.h>
  23 #include <rte_mbuf_pool_ops.h>
  24
  25 #include <fslmc_logs.h>
  26 #include <rte_fslmc.h>
  27 #include <mc/fsl_dpbp.h>
  28 #include "portal/dpaa2_hw_pvt.h"
  29 #include "portal/dpaa2_hw_dpio.h"
  30
  31
  32 TAILQ_HEAD(dpbp_dev_list, dpaa2_dpbp_dev);
  33 static struct dpbp_dev_list dpbp_dev_list
  34         = TAILQ_HEAD_INITIALIZER(dpbp_dev_list); /*!< DPBP device list */
  35
  36 static int
  37 dpaa2_create_dpbp_device(int vdev_fd __rte_unused,
  38                          struct vfio_device_info *obj_info __rte_unused,
  39                          int dpbp_id)
  40 {
  41         struct dpaa2_dpbp_dev *dpbp_node;
  42         int ret;
  43         static int register_once;
  44
  45         /* Allocate DPAA2 dpbp handle */
  46         dpbp_node = rte_malloc(NULL, sizeof(struct dpaa2_dpbp_dev), 0);
  47         if (!dpbp_node) {
  48                 DPAA2_BUS_ERR("Memory allocation failed for DPBP Device");
  49                 return -1;
  50         }
  51
  52         /* Open the dpbp object */
  53         dpbp_node->dpbp.regs = dpaa2_get_mcp_ptr(MC_PORTAL_INDEX);
  54         ret = dpbp_open(&dpbp_node->dpbp,
  55                         CMD_PRI_LOW, dpbp_id, &dpbp_node->token);
  56         if (ret) {
  57                 DPAA2_BUS_ERR("Unable to open buffer pool object: err(%d)",
  58                               ret);
  59                 rte_free(dpbp_node);
  60                 return -1;
  61         }
  62
  63         /* Clean the device first */
  64         ret = dpbp_reset(&dpbp_node->dpbp, CMD_PRI_LOW, dpbp_node->token);
  65         if (ret) {
  66                 DPAA2_BUS_ERR("Unable to reset buffer pool device. err(%d)",
  67                               ret);
  68                 dpbp_close(&dpbp_node->dpbp, CMD_PRI_LOW, dpbp_node->token);
  69                 rte_free(dpbp_node);
  70                 return -1;
  71         }
  72
  73         dpbp_node->dpbp_id = dpbp_id;
  74         rte_atomic16_init(&dpbp_node->in_use);
  75
  76         TAILQ_INSERT_TAIL(&dpbp_dev_list, dpbp_node, next);
  77
  78         if (!register_once) {
  79                 rte_mbuf_set_platform_mempool_ops(DPAA2_MEMPOOL_OPS_NAME);
  80                 register_once = 1;
  81         }
  82
  83         return 0;
  84 }
  85
  86 struct dpaa2_dpbp_dev *dpaa2_alloc_dpbp_dev(void)
  87 {
  88         struct dpaa2_dpbp_dev *dpbp_dev = NULL;
  89
  90         /* Get DPBP dev handle from list using index */
  91         TAILQ_FOREACH(dpbp_dev, &dpbp_dev_list, next) {
  92                 if (dpbp_dev && rte_atomic16_test_and_set(&dpbp_dev->in_use))
  93                         break;
  94         }
  95
  96         return dpbp_dev;
  97 }
  98
  99 void dpaa2_free_dpbp_dev(struct dpaa2_dpbp_dev *dpbp)
 100 {
 101         struct dpaa2_dpbp_dev *dpbp_dev = NULL;
 102
 103         /* Match DPBP handle and mark it free */
 104         TAILQ_FOREACH(dpbp_dev, &dpbp_dev_list, next) {
 105                 if (dpbp_dev == dpbp) {
 106                         rte_atomic16_dec(&dpbp_dev->in_use);
 107                         return;
 108                 }
 109         }
 110 }
 111
 112 int dpaa2_dpbp_supported(void)
 113 {
 114         if (TAILQ_EMPTY(&dpbp_dev_list))
 115                 return -1;
 116         return 0;
 117 }
 118
 119 static struct rte_dpaa2_object rte_dpaa2_dpbp_obj = {
 120         .dev_type = DPAA2_BPOOL,
 121         .create = dpaa2_create_dpbp_device,
 122 };
 123
 124 RTE_PMD_REGISTER_DPAA2_OBJECT(dpbp, rte_dpaa2_dpbp_obj);