drivers/net/bnxt/bnxt_vnic.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2014-2018 Broadcom
   3  * All rights reserved.
   4  */
   5
   6 #include <inttypes.h>
   7
   8 #include <rte_memzone.h>
   9 #include <rte_malloc.h>
  10
  11 #include "bnxt.h"
  12 #include "bnxt_vnic.h"
  13 #include "hsi_struct_def_dpdk.h"
  14
  15 /*
  16  * VNIC Functions
  17  */
  18
  19 static void prandom_bytes(void *dest_ptr, size_t len)
  20 {
  21         char *dest = (char *)dest_ptr;
  22         uint64_t rb;
  23
  24         while (len) {
  25                 rb = rte_rand();
  26                 if (len >= 8) {
  27                         memcpy(dest, &rb, 8);
  28                         len -= 8;
  29                         dest += 8;
  30                 } else {
  31                         memcpy(dest, &rb, len);
  32                         dest += len;
  33                         len = 0;
  34                 }
  35         }
  36 }
  37
  38 void bnxt_init_vnics(struct bnxt *bp)
  39 {
  40         struct bnxt_vnic_info *vnic;
  41         uint16_t max_vnics;
  42         int i;
  43
  44         max_vnics = bp->max_vnics;
  45         STAILQ_INIT(&bp->free_vnic_list);
  46         for (i = 0; i < max_vnics; i++) {
  47                 vnic = &bp->vnic_info[i];
  48                 vnic->fw_vnic_id = (uint16_t)HWRM_NA_SIGNATURE;
  49                 vnic->rss_rule = (uint16_t)HWRM_NA_SIGNATURE;
  50                 vnic->cos_rule = (uint16_t)HWRM_NA_SIGNATURE;
  51                 vnic->lb_rule = (uint16_t)HWRM_NA_SIGNATURE;
  52                 vnic->hash_mode =
  53                         HWRM_VNIC_RSS_CFG_INPUT_HASH_MODE_FLAGS_DEFAULT;
  54
  55                 prandom_bytes(vnic->rss_hash_key, HW_HASH_KEY_SIZE);
  56                 STAILQ_INIT(&vnic->filter);
  57                 STAILQ_INIT(&vnic->flow_list);
  58                 STAILQ_INSERT_TAIL(&bp->free_vnic_list, vnic, next);
  59         }
  60 }
  61
  62 struct bnxt_vnic_info *bnxt_alloc_vnic(struct bnxt *bp)
  63 {
  64         struct bnxt_vnic_info *vnic;
  65
  66         /* Find the 1st unused vnic from the free_vnic_list pool*/
  67         vnic = STAILQ_FIRST(&bp->free_vnic_list);
  68         if (!vnic) {
  69                 PMD_DRV_LOG(ERR, "No more free VNIC resources\n");
  70                 return NULL;
  71         }
  72         STAILQ_REMOVE_HEAD(&bp->free_vnic_list, next);
  73         return vnic;
  74 }
  75
  76 void bnxt_free_all_vnics(struct bnxt *bp)
  77 {
  78         struct bnxt_vnic_info *temp;
  79         unsigned int i;
  80
  81         for (i = 0; i < bp->nr_vnics; i++) {
  82                 temp = &bp->vnic_info[i];
  83                 STAILQ_INSERT_TAIL(&bp->free_vnic_list, temp, next);
  84         }
  85 }
  86
  87 void bnxt_free_vnic_attributes(struct bnxt *bp)
  88 {
  89         struct bnxt_vnic_info *vnic;
  90         unsigned int i;
  91
  92         for (i = 0; i < bp->max_vnics; i++) {
  93                 vnic = &bp->vnic_info[i];
  94                 if (vnic->rss_table) {
  95                         /* 'Unreserve' the rss_table */
  96                         /* N/A */
  97
  98                         vnic->rss_table = NULL;
  99                 }
 100
 101                 if (vnic->rss_hash_key) {
 102                         /* 'Unreserve' the rss_hash_key */
 103                         /* N/A */
 104
 105                         vnic->rss_hash_key = NULL;
 106                 }
 107         }
 108 }
 109
 110 int bnxt_alloc_vnic_attributes(struct bnxt *bp)
 111 {
 112         struct bnxt_vnic_info *vnic;
 113         struct rte_pci_device *pdev = bp->pdev;
 114         const struct rte_memzone *mz;
 115         char mz_name[RTE_MEMZONE_NAMESIZE];
 116         uint32_t entry_length = RTE_CACHE_LINE_ROUNDUP(
 117                                 HW_HASH_INDEX_SIZE * sizeof(*vnic->rss_table) +
 118                                 HW_HASH_KEY_SIZE +
 119                                 BNXT_MAX_MC_ADDRS * RTE_ETHER_ADDR_LEN);
 120         uint16_t max_vnics;
 121         int i;
 122         rte_iova_t mz_phys_addr;
 123
 124         max_vnics = bp->max_vnics;
 125         snprintf(mz_name, RTE_MEMZONE_NAMESIZE,
 126                  "bnxt_%04x:%02x:%02x:%02x_vnicattr", pdev->addr.domain,
 127                  pdev->addr.bus, pdev->addr.devid, pdev->addr.function);
 128         mz_name[RTE_MEMZONE_NAMESIZE - 1] = 0;
 129         mz = rte_memzone_lookup(mz_name);
 130         if (!mz) {
 131                 mz = rte_memzone_reserve(mz_name,
 132                                 entry_length * max_vnics, SOCKET_ID_ANY,
 133                                 RTE_MEMZONE_2MB |
 134                                 RTE_MEMZONE_SIZE_HINT_ONLY |
 135                                 RTE_MEMZONE_IOVA_CONTIG);
 136                 if (!mz)
 137                         return -ENOMEM;
 138         }
 139         mz_phys_addr = mz->iova;
 140         if ((unsigned long)mz->addr == mz_phys_addr) {
 141                 PMD_DRV_LOG(WARNING,
 142                         "Memzone physical address same as virtual.\n");
 143                 PMD_DRV_LOG(WARNING,
 144                         "Using rte_mem_virt2iova()\n");
 145                 mz_phys_addr = rte_mem_virt2iova(mz->addr);
 146                 if (mz_phys_addr == 0) {
 147                         PMD_DRV_LOG(ERR,
 148                         "unable to map vnic address to physical memory\n");
 149                         return -ENOMEM;
 150                 }
 151         }
 152
 153         for (i = 0; i < max_vnics; i++) {
 154                 vnic = &bp->vnic_info[i];
 155
 156                 /* Allocate rss table and hash key */
 157                 vnic->rss_table =
 158                         (void *)((char *)mz->addr + (entry_length * i));
 159                 memset(vnic->rss_table, -1, entry_length);
 160
 161                 vnic->rss_table_dma_addr = mz_phys_addr + (entry_length * i);
 162                 vnic->rss_hash_key = (void *)((char *)vnic->rss_table +
 163                              HW_HASH_INDEX_SIZE * sizeof(*vnic->rss_table));
 164
 165                 vnic->rss_hash_key_dma_addr = vnic->rss_table_dma_addr +
 166                              HW_HASH_INDEX_SIZE * sizeof(*vnic->rss_table);
 167                 vnic->mc_list = (void *)((char *)vnic->rss_hash_key +
 168                                 HW_HASH_KEY_SIZE);
 169                 vnic->mc_list_dma_addr = vnic->rss_hash_key_dma_addr +
 170                                 HW_HASH_KEY_SIZE;
 171         }
 172
 173         return 0;
 174 }
 175
 176 void bnxt_free_vnic_mem(struct bnxt *bp)
 177 {
 178         struct bnxt_vnic_info *vnic;
 179         uint16_t max_vnics, i;
 180
 181         if (bp->vnic_info == NULL)
 182                 return;
 183
 184         max_vnics = bp->max_vnics;
 185         for (i = 0; i < max_vnics; i++) {
 186                 vnic = &bp->vnic_info[i];
 187                 if (vnic->fw_vnic_id != (uint16_t)HWRM_NA_SIGNATURE) {
 188                         PMD_DRV_LOG(ERR, "VNIC is not freed yet!\n");
 189                         /* TODO Call HWRM to free VNIC */
 190                 }
 191         }
 192
 193         rte_free(bp->vnic_info);
 194         bp->vnic_info = NULL;
 195 }
 196
 197 int bnxt_alloc_vnic_mem(struct bnxt *bp)
 198 {
 199         struct bnxt_vnic_info *vnic_mem;
 200         uint16_t max_vnics;
 201
 202         max_vnics = bp->max_vnics;
 203         /* Allocate memory for VNIC pool and filter pool */
 204         vnic_mem = rte_zmalloc("bnxt_vnic_info",
 205                                max_vnics * sizeof(struct bnxt_vnic_info), 0);
 206         if (vnic_mem == NULL) {
 207                 PMD_DRV_LOG(ERR, "Failed to alloc memory for %d VNICs",
 208                         max_vnics);
 209                 return -ENOMEM;
 210         }
 211         bp->vnic_info = vnic_mem;
 212         return 0;
 213 }