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 #include <unistd.h>
  36
  37 #include "bnxt.h"
  38 #include "bnxt_cpr.h"
  39 #include "bnxt_hwrm.h"
  40 #include "bnxt_ring.h"
  41 #include "bnxt_rxq.h"
  42 #include "bnxt_rxr.h"
  43 #include "bnxt_txq.h"
  44 #include "bnxt_txr.h"
  45
  46 #include "hsi_struct_def_dpdk.h"
  47
  48 /*
  49  * Generic ring handling
  50  */
  51
  52 void bnxt_free_ring(struct bnxt_ring *ring)
  53 {
  54         if (ring->vmem_size && *ring->vmem) {
  55                 memset((char *)*ring->vmem, 0, ring->vmem_size);
  56                 *ring->vmem = NULL;
  57         }
  58         rte_memzone_free((const struct rte_memzone *)ring->mem_zone);
  59 }
  60
  61 /*
  62  * Ring groups
  63  */
  64
  65 void bnxt_init_ring_grps(struct bnxt *bp)
  66 {
  67         unsigned int i;
  68
  69         for (i = 0; i < bp->max_ring_grps; i++)
  70                 memset(&bp->grp_info[i], (uint8_t)HWRM_NA_SIGNATURE,
  71                        sizeof(struct bnxt_ring_grp_info));
  72 }
  73
  74 /*
  75  * Allocates a completion ring with vmem and stats optionally also allocating
  76  * a TX and/or RX ring.  Passing NULL as tx_ring_info and/or rx_ring_info
  77  * to not allocate them.
  78  *
  79  * Order in the allocation is:
  80  * stats - Always non-zero length
  81  * cp vmem - Always zero-length, supported for the bnxt_ring abstraction
  82  * tx vmem - Only non-zero length if tx_ring_info is not NULL
  83  * rx vmem - Only non-zero length if rx_ring_info is not NULL
  84  * cp bd ring - Always non-zero length
  85  * tx bd ring - Only non-zero length if tx_ring_info is not NULL
  86  * rx bd ring - Only non-zero length if rx_ring_info is not NULL
  87  */
  88 int bnxt_alloc_rings(struct bnxt *bp, uint16_t qidx,
  89                             struct bnxt_tx_ring_info *tx_ring_info,
  90                             struct bnxt_rx_ring_info *rx_ring_info,
  91                             struct bnxt_cp_ring_info *cp_ring_info,
  92                             const char *suffix)
  93 {
  94         struct bnxt_ring *cp_ring = cp_ring_info->cp_ring_struct;
  95         struct bnxt_ring *tx_ring;
  96         struct bnxt_ring *rx_ring;
  97         struct rte_pci_device *pdev = bp->pdev;
  98         const struct rte_memzone *mz = NULL;
  99         char mz_name[RTE_MEMZONE_NAMESIZE];
 100         phys_addr_t mz_phys_addr;
 101         int sz;
 102
 103         int stats_len = (tx_ring_info || rx_ring_info) ?
 104             RTE_CACHE_LINE_ROUNDUP(sizeof(struct ctx_hw_stats64)) : 0;
 105
 106         int cp_vmem_start = stats_len;
 107         int cp_vmem_len = RTE_CACHE_LINE_ROUNDUP(cp_ring->vmem_size);
 108
 109         int tx_vmem_start = cp_vmem_start + cp_vmem_len;
 110         int tx_vmem_len =
 111             tx_ring_info ? RTE_CACHE_LINE_ROUNDUP(tx_ring_info->
 112                                                 tx_ring_struct->vmem_size) : 0;
 113
 114         int rx_vmem_start = tx_vmem_start + tx_vmem_len;
 115         int rx_vmem_len = rx_ring_info ?
 116                 RTE_CACHE_LINE_ROUNDUP(rx_ring_info->
 117                                                 rx_ring_struct->vmem_size) : 0;
 118
 119         int cp_ring_start = rx_vmem_start + rx_vmem_len;
 120         int cp_ring_len = RTE_CACHE_LINE_ROUNDUP(cp_ring->ring_size *
 121                                                  sizeof(struct cmpl_base));
 122
 123         int tx_ring_start = cp_ring_start + cp_ring_len;
 124         int tx_ring_len = tx_ring_info ?
 125             RTE_CACHE_LINE_ROUNDUP(tx_ring_info->tx_ring_struct->ring_size *
 126                                    sizeof(struct tx_bd_long)) : 0;
 127
 128         int rx_ring_start = tx_ring_start + tx_ring_len;
 129         int rx_ring_len =  rx_ring_info ?
 130                 RTE_CACHE_LINE_ROUNDUP(rx_ring_info->rx_ring_struct->ring_size *
 131                 sizeof(struct rx_prod_pkt_bd)) : 0;
 132
 133         int total_alloc_len = rx_ring_start + rx_ring_len;
 134
 135         snprintf(mz_name, RTE_MEMZONE_NAMESIZE,
 136                  "bnxt_%04x:%02x:%02x:%02x-%04x_%s", pdev->addr.domain,
 137                  pdev->addr.bus, pdev->addr.devid, pdev->addr.function, qidx,
 138                  suffix);
 139         mz_name[RTE_MEMZONE_NAMESIZE - 1] = 0;
 140         mz = rte_memzone_lookup(mz_name);
 141         if (!mz) {
 142                 mz = rte_memzone_reserve_aligned(mz_name, total_alloc_len,
 143                                          SOCKET_ID_ANY,
 144                                          RTE_MEMZONE_2MB |
 145                                          RTE_MEMZONE_SIZE_HINT_ONLY,
 146                                          getpagesize());
 147                 if (mz == NULL)
 148                         return -ENOMEM;
 149         }
 150         memset(mz->addr, 0, mz->len);
 151         mz_phys_addr = mz->phys_addr;
 152         if ((unsigned long)mz->addr == mz_phys_addr) {
 153                 RTE_LOG(WARNING, PMD,
 154                         "Memzone physical address same as virtual.\n");
 155                 RTE_LOG(WARNING, PMD,
 156                         "Using rte_mem_virt2phy()\n");
 157                 for (sz = 0; sz < total_alloc_len; sz += getpagesize())
 158                         rte_mem_lock_page(((char *)mz->addr) + sz);
 159                 mz_phys_addr = rte_mem_virt2phy(mz->addr);
 160                 if (mz_phys_addr == 0) {
 161                         RTE_LOG(ERR, PMD,
 162                         "unable to map ring address to physical memory\n");
 163                         return -ENOMEM;
 164                 }
 165         }
 166
 167         if (tx_ring_info) {
 168                 tx_ring = tx_ring_info->tx_ring_struct;
 169
 170                 tx_ring->bd = ((char *)mz->addr + tx_ring_start);
 171                 tx_ring_info->tx_desc_ring = (struct tx_bd_long *)tx_ring->bd;
 172                 tx_ring->bd_dma = mz_phys_addr + tx_ring_start;
 173                 tx_ring_info->tx_desc_mapping = tx_ring->bd_dma;
 174                 tx_ring->mem_zone = (const void *)mz;
 175
 176                 if (!tx_ring->bd)
 177                         return -ENOMEM;
 178                 if (tx_ring->vmem_size) {
 179                         tx_ring->vmem =
 180                             (void **)((char *)mz->addr + tx_vmem_start);
 181                         tx_ring_info->tx_buf_ring =
 182                             (struct bnxt_sw_tx_bd *)tx_ring->vmem;
 183                 }
 184         }
 185
 186         if (rx_ring_info) {
 187                 rx_ring = rx_ring_info->rx_ring_struct;
 188
 189                 rx_ring->bd = ((char *)mz->addr + rx_ring_start);
 190                 rx_ring_info->rx_desc_ring =
 191                     (struct rx_prod_pkt_bd *)rx_ring->bd;
 192                 rx_ring->bd_dma = mz_phys_addr + rx_ring_start;
 193                 rx_ring_info->rx_desc_mapping = rx_ring->bd_dma;
 194                 rx_ring->mem_zone = (const void *)mz;
 195
 196                 if (!rx_ring->bd)
 197                         return -ENOMEM;
 198                 if (rx_ring->vmem_size) {
 199                         rx_ring->vmem =
 200                             (void **)((char *)mz->addr + rx_vmem_start);
 201                         rx_ring_info->rx_buf_ring =
 202                             (struct bnxt_sw_rx_bd *)rx_ring->vmem;
 203                 }
 204         }
 205
 206         cp_ring->bd = ((char *)mz->addr + cp_ring_start);
 207         cp_ring->bd_dma = mz_phys_addr + cp_ring_start;
 208         cp_ring_info->cp_desc_ring = cp_ring->bd;
 209         cp_ring_info->cp_desc_mapping = cp_ring->bd_dma;
 210         cp_ring->mem_zone = (const void *)mz;
 211
 212         if (!cp_ring->bd)
 213                 return -ENOMEM;
 214         if (cp_ring->vmem_size)
 215                 *cp_ring->vmem = ((char *)mz->addr + stats_len);
 216         if (stats_len) {
 217                 cp_ring_info->hw_stats = mz->addr;
 218                 cp_ring_info->hw_stats_map = mz_phys_addr;
 219         }
 220         cp_ring_info->hw_stats_ctx_id = HWRM_NA_SIGNATURE;
 221         return 0;
 222 }
 223
 224 /* ring_grp usage:
 225  * [0] = default completion ring
 226  * [1 -> +rx_cp_nr_rings] = rx_cp, rx rings
 227  * [1+rx_cp_nr_rings + 1 -> +tx_cp_nr_rings] = tx_cp, tx rings
 228  */
 229 int bnxt_alloc_hwrm_rings(struct bnxt *bp)
 230 {
 231         struct rte_pci_device *pci_dev = bp->pdev;
 232         unsigned int i;
 233         int rc = 0;
 234
 235         for (i = 0; i < bp->rx_cp_nr_rings; i++) {
 236                 struct bnxt_rx_queue *rxq = bp->rx_queues[i];
 237                 struct bnxt_cp_ring_info *cpr = rxq->cp_ring;
 238                 struct bnxt_ring *cp_ring = cpr->cp_ring_struct;
 239                 struct bnxt_rx_ring_info *rxr = rxq->rx_ring;
 240                 struct bnxt_ring *ring = rxr->rx_ring_struct;
 241                 unsigned int idx = i + 1;
 242
 243                 /* Rx cmpl */
 244                 rc = bnxt_hwrm_ring_alloc(bp, cp_ring,
 245                                         HWRM_RING_ALLOC_INPUT_RING_TYPE_L2_CMPL,
 246                                         idx, HWRM_NA_SIGNATURE);
 247                 if (rc)
 248                         goto err_out;
 249                 cpr->cp_doorbell = (char *)pci_dev->mem_resource[2].addr +
 250                     idx * 0x80;
 251                 bp->grp_info[idx].cp_fw_ring_id = cp_ring->fw_ring_id;
 252                 B_CP_DIS_DB(cpr, cpr->cp_raw_cons);
 253
 254                 /* Rx ring */
 255                 rc = bnxt_hwrm_ring_alloc(bp, ring,
 256                                         HWRM_RING_ALLOC_INPUT_RING_TYPE_RX,
 257                                         idx, cpr->hw_stats_ctx_id);
 258                 if (rc)
 259                         goto err_out;
 260                 rxr->rx_prod = 0;
 261                 rxr->rx_doorbell = (char *)pci_dev->mem_resource[2].addr +
 262                     idx * 0x80;
 263                 bp->grp_info[idx].rx_fw_ring_id = ring->fw_ring_id;
 264                 B_RX_DB(rxr->rx_doorbell, rxr->rx_prod);
 265                 if (bnxt_init_one_rx_ring(rxq)) {
 266                         RTE_LOG(ERR, PMD, "bnxt_init_one_rx_ring failed!\n");
 267                         bnxt_rx_queue_release_op(rxq);
 268                         return -ENOMEM;
 269                 }
 270                 B_RX_DB(rxr->rx_doorbell, rxr->rx_prod);
 271         }
 272
 273         for (i = 0; i < bp->tx_cp_nr_rings; i++) {
 274                 struct bnxt_tx_queue *txq = bp->tx_queues[i];
 275                 struct bnxt_cp_ring_info *cpr = txq->cp_ring;
 276                 struct bnxt_ring *cp_ring = cpr->cp_ring_struct;
 277                 struct bnxt_tx_ring_info *txr = txq->tx_ring;
 278                 struct bnxt_ring *ring = txr->tx_ring_struct;
 279                 unsigned int idx = 1 + bp->rx_cp_nr_rings + i;
 280
 281                 /* Tx cmpl */
 282                 rc = bnxt_hwrm_ring_alloc(bp, cp_ring,
 283                                         HWRM_RING_ALLOC_INPUT_RING_TYPE_L2_CMPL,
 284                                         idx, HWRM_NA_SIGNATURE);
 285                 if (rc)
 286                         goto err_out;
 287
 288                 cpr->cp_doorbell = (char *)pci_dev->mem_resource[2].addr +
 289                     idx * 0x80;
 290                 bp->grp_info[idx].cp_fw_ring_id = cp_ring->fw_ring_id;
 291                 B_CP_DIS_DB(cpr, cpr->cp_raw_cons);
 292
 293                 /* Tx ring */
 294                 rc = bnxt_hwrm_ring_alloc(bp, ring,
 295                                         HWRM_RING_ALLOC_INPUT_RING_TYPE_TX,
 296                                         idx, cpr->hw_stats_ctx_id);
 297                 if (rc)
 298                         goto err_out;
 299
 300                 txr->tx_doorbell = (char *)pci_dev->mem_resource[2].addr +
 301                     idx * 0x80;
 302         }
 303
 304 err_out:
 305         return rc;
 306 }