drivers/net/bnxt/bnxt_ring.c

   1 /*-
   2  *   BSD LICENSE
   3  *
   4  *   Copyright(c) Broadcom Limited.
   5  *   All rights reserved.
   6  *
   7  *   Redistribution and use in source and binary forms, with or without
   8  *   modification, are permitted provided that the following conditions
   9  *   are met:
  10  *
  11  *     * Redistributions of source code must retain the above copyright
  12  *       notice, this list of conditions and the following disclaimer.
  13  *     * Redistributions in binary form must reproduce the above copyright
  14  *       notice, this list of conditions and the following disclaimer in
  15  *       the documentation and/or other materials provided with the
  16  *       distribution.
  17  *     * Neither the name of Broadcom Corporation nor the names of its
  18  *       contributors may be used to endorse or promote products derived
  19  *       from this software without specific prior written permission.
  20  *
  21  *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  22  *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  23  *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  24  *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  25  *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  26  *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  27  *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  28  *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  29  *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  30  *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  31  *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32  */
  33
  34 #include <rte_memzone.h>
  35
  36 #include "bnxt.h"
  37 #include "bnxt_cpr.h"
  38 #include "bnxt_hwrm.h"
  39 #include "bnxt_ring.h"
  40 #include "bnxt_rxq.h"
  41 #include "bnxt_rxr.h"
  42 #include "bnxt_txq.h"
  43 #include "bnxt_txr.h"
  44
  45 #include "hsi_struct_def_dpdk.h"
  46
  47 /*
  48  * Generic ring handling
  49  */
  50
  51 void bnxt_free_ring(struct bnxt_ring *ring)
  52 {
  53         if (ring->vmem_size && *ring->vmem) {
  54                 memset((char *)*ring->vmem, 0, ring->vmem_size);
  55                 *ring->vmem = NULL;
  56         }
  57         rte_memzone_free((const struct rte_memzone *)ring->mem_zone);
  58 }
  59
  60 /*
  61  * Ring groups
  62  */
  63
  64 void bnxt_init_ring_grps(struct bnxt *bp)
  65 {
  66         unsigned int i;
  67
  68         for (i = 0; i < bp->max_ring_grps; i++)
  69                 memset(&bp->grp_info[i], (uint8_t)HWRM_NA_SIGNATURE,
  70                        sizeof(struct bnxt_ring_grp_info));
  71 }
  72
  73 /*
  74  * Allocates a completion ring with vmem and stats optionally also allocating
  75  * a TX and/or RX ring.  Passing NULL as tx_ring_info and/or rx_ring_info
  76  * to not allocate them.
  77  *
  78  * Order in the allocation is:
  79  * stats - Always non-zero length
  80  * cp vmem - Always zero-length, supported for the bnxt_ring abstraction
  81  * tx vmem - Only non-zero length if tx_ring_info is not NULL
  82  * rx vmem - Only non-zero length if rx_ring_info is not NULL
  83  * cp bd ring - Always non-zero length
  84  * tx bd ring - Only non-zero length if tx_ring_info is not NULL
  85  * rx bd ring - Only non-zero length if rx_ring_info is not NULL
  86  */
  87 int bnxt_alloc_rings(struct bnxt *bp, uint16_t qidx,
  88                             struct bnxt_tx_ring_info *tx_ring_info,
  89                             struct bnxt_rx_ring_info *rx_ring_info,
  90                             struct bnxt_cp_ring_info *cp_ring_info,
  91                             const char *suffix)
  92 {
  93         struct bnxt_ring *cp_ring = cp_ring_info->cp_ring_struct;
  94         struct bnxt_ring *tx_ring;
  95         struct bnxt_ring *rx_ring;
  96         struct rte_pci_device *pdev = bp->pdev;
  97         const struct rte_memzone *mz = NULL;
  98         char mz_name[RTE_MEMZONE_NAMESIZE];
  99
 100         int stats_len = (tx_ring_info || rx_ring_info) ?
 101             RTE_CACHE_LINE_ROUNDUP(sizeof(struct ctx_hw_stats64)) : 0;
 102
 103         int cp_vmem_start = stats_len;
 104         int cp_vmem_len = RTE_CACHE_LINE_ROUNDUP(cp_ring->vmem_size);
 105
 106         int tx_vmem_start = cp_vmem_start + cp_vmem_len;
 107         int tx_vmem_len =
 108             tx_ring_info ? RTE_CACHE_LINE_ROUNDUP(tx_ring_info->
 109                                                 tx_ring_struct->vmem_size) : 0;
 110
 111         int rx_vmem_start = tx_vmem_start + tx_vmem_len;
 112         int rx_vmem_len = rx_ring_info ?
 113                 RTE_CACHE_LINE_ROUNDUP(rx_ring_info->
 114                                                 rx_ring_struct->vmem_size) : 0;
 115
 116         int cp_ring_start = rx_vmem_start + rx_vmem_len;
 117         int cp_ring_len = RTE_CACHE_LINE_ROUNDUP(cp_ring->ring_size *
 118                                                  sizeof(struct cmpl_base));
 119
 120         int tx_ring_start = cp_ring_start + cp_ring_len;
 121         int tx_ring_len = tx_ring_info ?
 122             RTE_CACHE_LINE_ROUNDUP(tx_ring_info->tx_ring_struct->ring_size *
 123                                    sizeof(struct tx_bd_long)) : 0;
 124
 125         int rx_ring_start = tx_ring_start + tx_ring_len;
 126         int rx_ring_len =  rx_ring_info ?
 127                 RTE_CACHE_LINE_ROUNDUP(rx_ring_info->rx_ring_struct->ring_size *
 128                 sizeof(struct rx_prod_pkt_bd)) : 0;
 129
 130         int total_alloc_len = rx_ring_start + rx_ring_len;
 131
 132         snprintf(mz_name, RTE_MEMZONE_NAMESIZE,
 133                  "bnxt_%04x:%02x:%02x:%02x-%04x_%s", pdev->addr.domain,
 134                  pdev->addr.bus, pdev->addr.devid, pdev->addr.function, qidx,
 135                  suffix);
 136         mz_name[RTE_MEMZONE_NAMESIZE - 1] = 0;
 137         mz = rte_memzone_lookup(mz_name);
 138         if (!mz) {
 139                 mz = rte_memzone_reserve(mz_name, total_alloc_len,
 140                                          SOCKET_ID_ANY,
 141                                          RTE_MEMZONE_2MB |
 142                                          RTE_MEMZONE_SIZE_HINT_ONLY);
 143                 if (mz == NULL)
 144                         return -ENOMEM;
 145         }
 146         memset(mz->addr, 0, mz->len);
 147
 148         if (tx_ring_info) {
 149                 tx_ring = tx_ring_info->tx_ring_struct;
 150
 151                 tx_ring->bd = ((char *)mz->addr + tx_ring_start);
 152                 tx_ring_info->tx_desc_ring = (struct tx_bd_long *)tx_ring->bd;
 153                 tx_ring->bd_dma = mz->phys_addr + tx_ring_start;
 154                 tx_ring_info->tx_desc_mapping = tx_ring->bd_dma;
 155                 tx_ring->mem_zone = (const void *)mz;
 156
 157                 if (!tx_ring->bd)
 158                         return -ENOMEM;
 159                 if (tx_ring->vmem_size) {
 160                         tx_ring->vmem =
 161                             (void **)((char *)mz->addr + tx_vmem_start);
 162                         tx_ring_info->tx_buf_ring =
 163                             (struct bnxt_sw_tx_bd *)tx_ring->vmem;
 164                 }
 165         }
 166
 167         if (rx_ring_info) {
 168                 rx_ring = rx_ring_info->rx_ring_struct;
 169
 170                 rx_ring->bd = ((char *)mz->addr + rx_ring_start);
 171                 rx_ring_info->rx_desc_ring =
 172                     (struct rx_prod_pkt_bd *)rx_ring->bd;
 173                 rx_ring->bd_dma = mz->phys_addr + rx_ring_start;
 174                 rx_ring_info->rx_desc_mapping = rx_ring->bd_dma;
 175                 rx_ring->mem_zone = (const void *)mz;
 176
 177                 if (!rx_ring->bd)
 178                         return -ENOMEM;
 179                 if (rx_ring->vmem_size) {
 180                         rx_ring->vmem =
 181                             (void **)((char *)mz->addr + rx_vmem_start);
 182                         rx_ring_info->rx_buf_ring =
 183                             (struct bnxt_sw_rx_bd *)rx_ring->vmem;
 184                 }
 185         }
 186
 187         cp_ring->bd = ((char *)mz->addr + cp_ring_start);
 188         cp_ring->bd_dma = mz->phys_addr + cp_ring_start;
 189         cp_ring_info->cp_desc_ring = cp_ring->bd;
 190         cp_ring_info->cp_desc_mapping = cp_ring->bd_dma;
 191         cp_ring->mem_zone = (const void *)mz;
 192
 193         if (!cp_ring->bd)
 194                 return -ENOMEM;
 195         if (cp_ring->vmem_size)
 196                 *cp_ring->vmem = ((char *)mz->addr + stats_len);
 197         if (stats_len) {
 198                 cp_ring_info->hw_stats = mz->addr;
 199                 cp_ring_info->hw_stats_map = mz->phys_addr;
 200         }
 201         cp_ring_info->hw_stats_ctx_id = HWRM_NA_SIGNATURE;
 202         return 0;
 203 }
 204
 205 /* ring_grp usage:
 206  * [0] = default completion ring
 207  * [1 -> +rx_cp_nr_rings] = rx_cp, rx rings
 208  * [1+rx_cp_nr_rings + 1 -> +tx_cp_nr_rings] = tx_cp, tx rings
 209  */
 210 int bnxt_alloc_hwrm_rings(struct bnxt *bp)
 211 {
 212         unsigned int i;
 213         int rc = 0;
 214
 215         /* Default completion ring */
 216         {
 217                 struct bnxt_cp_ring_info *cpr = bp->def_cp_ring;
 218                 struct bnxt_ring *cp_ring = cpr->cp_ring_struct;
 219
 220                 rc = bnxt_hwrm_ring_alloc(bp, cp_ring,
 221                                           HWRM_RING_ALLOC_INPUT_RING_TYPE_CMPL,
 222                                           0, HWRM_NA_SIGNATURE);
 223                 if (rc)
 224                         goto err_out;
 225                 cpr->cp_doorbell =
 226                     (char *)bp->eth_dev->pci_dev->mem_resource[2].addr;
 227                 B_CP_DIS_DB(cpr, cpr->cp_raw_cons);
 228                 bp->grp_info[0].cp_fw_ring_id = cp_ring->fw_ring_id;
 229         }
 230
 231         for (i = 0; i < bp->rx_cp_nr_rings; i++) {
 232                 struct bnxt_rx_queue *rxq = bp->rx_queues[i];
 233                 struct bnxt_cp_ring_info *cpr = rxq->cp_ring;
 234                 struct bnxt_ring *cp_ring = cpr->cp_ring_struct;
 235                 struct bnxt_rx_ring_info *rxr = rxq->rx_ring;
 236                 struct bnxt_ring *ring = rxr->rx_ring_struct;
 237                 unsigned int idx = i + 1;
 238
 239                 /* Rx cmpl */
 240                 rc = bnxt_hwrm_ring_alloc(bp, cp_ring,
 241                                         HWRM_RING_ALLOC_INPUT_RING_TYPE_CMPL,
 242                                         idx, HWRM_NA_SIGNATURE);
 243                 if (rc)
 244                         goto err_out;
 245                 cpr->cp_doorbell =
 246                     (char *)bp->eth_dev->pci_dev->mem_resource[2].addr +
 247                     idx * 0x80;
 248                 bp->grp_info[idx].cp_fw_ring_id = cp_ring->fw_ring_id;
 249                 B_CP_DIS_DB(cpr, cpr->cp_raw_cons);
 250
 251                 /* Rx ring */
 252                 rc = bnxt_hwrm_ring_alloc(bp, ring,
 253                                         HWRM_RING_ALLOC_INPUT_RING_TYPE_RX,
 254                                         idx, cpr->hw_stats_ctx_id);
 255                 if (rc)
 256                         goto err_out;
 257                 rxr->rx_prod = 0;
 258                 rxr->rx_doorbell =
 259                     (char *)bp->eth_dev->pci_dev->mem_resource[2].addr +
 260                     idx * 0x80;
 261                 bp->grp_info[idx].rx_fw_ring_id = ring->fw_ring_id;
 262                 B_RX_DB(rxr->rx_doorbell, rxr->rx_prod);
 263                 if (bnxt_init_one_rx_ring(rxq)) {
 264                         RTE_LOG(ERR, PMD, "bnxt_init_one_rx_ring failed!");
 265                         bnxt_rx_queue_release_op(rxq);
 266                         return -ENOMEM;
 267                 }
 268                 B_RX_DB(rxr->rx_doorbell, rxr->rx_prod);
 269         }
 270
 271         for (i = 0; i < bp->tx_cp_nr_rings; i++) {
 272                 struct bnxt_tx_queue *txq = bp->tx_queues[i];
 273                 struct bnxt_cp_ring_info *cpr = txq->cp_ring;
 274                 struct bnxt_ring *cp_ring = cpr->cp_ring_struct;
 275                 struct bnxt_tx_ring_info *txr = txq->tx_ring;
 276                 struct bnxt_ring *ring = txr->tx_ring_struct;
 277                 unsigned int idx = 1 + bp->rx_cp_nr_rings + i;
 278
 279                 /* Tx cmpl */
 280                 rc = bnxt_hwrm_ring_alloc(bp, cp_ring,
 281                                         HWRM_RING_ALLOC_INPUT_RING_TYPE_CMPL,
 282                                         idx, HWRM_NA_SIGNATURE);
 283                 if (rc)
 284                         goto err_out;
 285
 286                 cpr->cp_doorbell =
 287                     (char *)bp->eth_dev->pci_dev->mem_resource[2].addr +
 288                     idx * 0x80;
 289                 bp->grp_info[idx].cp_fw_ring_id = cp_ring->fw_ring_id;
 290                 B_CP_DIS_DB(cpr, cpr->cp_raw_cons);
 291
 292                 /* Tx ring */
 293                 rc = bnxt_hwrm_ring_alloc(bp, ring,
 294                                         HWRM_RING_ALLOC_INPUT_RING_TYPE_TX,
 295                                         idx, cpr->hw_stats_ctx_id);
 296                 if (rc)
 297                         goto err_out;
 298
 299                 txr->tx_doorbell =
 300                     (char *)bp->eth_dev->pci_dev->mem_resource[2].addr +
 301                     idx * 0x80;
 302         }
 303
 304 err_out:
 305         return rc;
 306 }