drivers/net/bnxt/bnxt_ring.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2014-2018 Broadcom
   3  * All rights reserved.
   4  */
   5
   6 #include <rte_bitmap.h>
   7 #include <rte_memzone.h>
   8 #include <unistd.h>
   9
  10 #include "bnxt.h"
  11 #include "bnxt_cpr.h"
  12 #include "bnxt_hwrm.h"
  13 #include "bnxt_ring.h"
  14 #include "bnxt_rxq.h"
  15 #include "bnxt_rxr.h"
  16 #include "bnxt_txq.h"
  17 #include "bnxt_txr.h"
  18
  19 #include "hsi_struct_def_dpdk.h"
  20
  21 /*
  22  * Generic ring handling
  23  */
  24
  25 void bnxt_free_ring(struct bnxt_ring *ring)
  26 {
  27         if (ring->vmem_size && *ring->vmem) {
  28                 memset((char *)*ring->vmem, 0, ring->vmem_size);
  29                 *ring->vmem = NULL;
  30         }
  31         rte_memzone_free((const struct rte_memzone *)ring->mem_zone);
  32 }
  33
  34 /*
  35  * Ring groups
  36  */
  37
  38 int bnxt_init_ring_grps(struct bnxt *bp)
  39 {
  40         unsigned int i;
  41
  42         for (i = 0; i < bp->max_ring_grps; i++)
  43                 memset(&bp->grp_info[i], (uint8_t)HWRM_NA_SIGNATURE,
  44                        sizeof(struct bnxt_ring_grp_info));
  45
  46         return 0;
  47 }
  48
  49 /*
  50  * Allocates a completion ring with vmem and stats optionally also allocating
  51  * a TX and/or RX ring.  Passing NULL as tx_ring_info and/or rx_ring_info
  52  * to not allocate them.
  53  *
  54  * Order in the allocation is:
  55  * stats - Always non-zero length
  56  * cp vmem - Always zero-length, supported for the bnxt_ring abstraction
  57  * tx vmem - Only non-zero length if tx_ring_info is not NULL
  58  * rx vmem - Only non-zero length if rx_ring_info is not NULL
  59  * cp bd ring - Always non-zero length
  60  * tx bd ring - Only non-zero length if tx_ring_info is not NULL
  61  * rx bd ring - Only non-zero length if rx_ring_info is not NULL
  62  */
  63 int bnxt_alloc_rings(struct bnxt *bp, uint16_t qidx,
  64                             struct bnxt_tx_ring_info *tx_ring_info,
  65                             struct bnxt_rx_ring_info *rx_ring_info,
  66                             struct bnxt_cp_ring_info *cp_ring_info,
  67                             const char *suffix)
  68 {
  69         struct bnxt_ring *cp_ring = cp_ring_info->cp_ring_struct;
  70         struct bnxt_ring *tx_ring;
  71         struct bnxt_ring *rx_ring;
  72         struct rte_pci_device *pdev = bp->pdev;
  73         uint64_t rx_offloads = bp->eth_dev->data->dev_conf.rxmode.offloads;
  74         const struct rte_memzone *mz = NULL;
  75         char mz_name[RTE_MEMZONE_NAMESIZE];
  76         rte_iova_t mz_phys_addr;
  77         int sz;
  78
  79         int stats_len = (tx_ring_info || rx_ring_info) ?
  80             RTE_CACHE_LINE_ROUNDUP(sizeof(struct ctx_hw_stats64)) : 0;
  81
  82         int cp_vmem_start = stats_len;
  83         int cp_vmem_len = RTE_CACHE_LINE_ROUNDUP(cp_ring->vmem_size);
  84
  85         int tx_vmem_start = cp_vmem_start + cp_vmem_len;
  86         int tx_vmem_len =
  87             tx_ring_info ? RTE_CACHE_LINE_ROUNDUP(tx_ring_info->
  88                                                 tx_ring_struct->vmem_size) : 0;
  89
  90         int rx_vmem_start = tx_vmem_start + tx_vmem_len;
  91         int rx_vmem_len = rx_ring_info ?
  92                 RTE_CACHE_LINE_ROUNDUP(rx_ring_info->
  93                                                 rx_ring_struct->vmem_size) : 0;
  94         int ag_vmem_start = 0;
  95         int ag_vmem_len = 0;
  96         int cp_ring_start =  0;
  97
  98         ag_vmem_start = rx_vmem_start + rx_vmem_len;
  99         ag_vmem_len = rx_ring_info ? RTE_CACHE_LINE_ROUNDUP(
 100                                 rx_ring_info->ag_ring_struct->vmem_size) : 0;
 101         cp_ring_start = ag_vmem_start + ag_vmem_len;
 102
 103         int cp_ring_len = RTE_CACHE_LINE_ROUNDUP(cp_ring->ring_size *
 104                                                  sizeof(struct cmpl_base));
 105
 106         int tx_ring_start = cp_ring_start + cp_ring_len;
 107         int tx_ring_len = tx_ring_info ?
 108             RTE_CACHE_LINE_ROUNDUP(tx_ring_info->tx_ring_struct->ring_size *
 109                                    sizeof(struct tx_bd_long)) : 0;
 110
 111         int rx_ring_start = tx_ring_start + tx_ring_len;
 112         int rx_ring_len =  rx_ring_info ?
 113                 RTE_CACHE_LINE_ROUNDUP(rx_ring_info->rx_ring_struct->ring_size *
 114                 sizeof(struct rx_prod_pkt_bd)) : 0;
 115
 116         int ag_ring_start = rx_ring_start + rx_ring_len;
 117         int ag_ring_len = rx_ring_len * AGG_RING_SIZE_FACTOR;
 118
 119         int ag_bitmap_start = ag_ring_start + ag_ring_len;
 120         int ag_bitmap_len =  rx_ring_info ?
 121                 RTE_CACHE_LINE_ROUNDUP(rte_bitmap_get_memory_footprint(
 122                         rx_ring_info->rx_ring_struct->ring_size *
 123                         AGG_RING_SIZE_FACTOR)) : 0;
 124
 125         int tpa_info_start = ag_bitmap_start + ag_bitmap_len;
 126         int tpa_info_len = rx_ring_info ?
 127                 RTE_CACHE_LINE_ROUNDUP(BNXT_TPA_MAX *
 128                                        sizeof(struct bnxt_tpa_info)) : 0;
 129
 130         int total_alloc_len = tpa_info_start;
 131         if (rx_offloads & DEV_RX_OFFLOAD_TCP_LRO)
 132                 total_alloc_len += tpa_info_len;
 133
 134         snprintf(mz_name, RTE_MEMZONE_NAMESIZE,
 135                  "bnxt_%04x:%02x:%02x:%02x-%04x_%s", pdev->addr.domain,
 136                  pdev->addr.bus, pdev->addr.devid, pdev->addr.function, qidx,
 137                  suffix);
 138         mz_name[RTE_MEMZONE_NAMESIZE - 1] = 0;
 139         mz = rte_memzone_lookup(mz_name);
 140         if (!mz) {
 141                 mz = rte_memzone_reserve_aligned(mz_name, total_alloc_len,
 142                                 SOCKET_ID_ANY,
 143                                 RTE_MEMZONE_2MB |
 144                                 RTE_MEMZONE_SIZE_HINT_ONLY |
 145                                 RTE_MEMZONE_IOVA_CONTIG,
 146                                 getpagesize());
 147                 if (mz == NULL)
 148                         return -ENOMEM;
 149         }
 150         memset(mz->addr, 0, mz->len);
 151         mz_phys_addr = mz->iova;
 152         if ((unsigned long)mz->addr == mz_phys_addr) {
 153                 PMD_DRV_LOG(WARNING,
 154                         "Memzone physical address same as virtual.\n");
 155                 PMD_DRV_LOG(WARNING,
 156                         "Using rte_mem_virt2iova()\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_virt2iova(mz->addr);
 160                 if (mz_phys_addr == 0) {
 161                         PMD_DRV_LOG(ERR,
 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                 rx_ring = rx_ring_info->ag_ring_struct;
 206
 207                 rx_ring->bd = ((char *)mz->addr + ag_ring_start);
 208                 rx_ring_info->ag_desc_ring =
 209                     (struct rx_prod_pkt_bd *)rx_ring->bd;
 210                 rx_ring->bd_dma = mz->iova + ag_ring_start;
 211                 rx_ring_info->ag_desc_mapping = rx_ring->bd_dma;
 212                 rx_ring->mem_zone = (const void *)mz;
 213
 214                 if (!rx_ring->bd)
 215                         return -ENOMEM;
 216                 if (rx_ring->vmem_size) {
 217                         rx_ring->vmem =
 218                             (void **)((char *)mz->addr + ag_vmem_start);
 219                         rx_ring_info->ag_buf_ring =
 220                             (struct bnxt_sw_rx_bd *)rx_ring->vmem;
 221                 }
 222
 223                 rx_ring_info->ag_bitmap =
 224                     rte_bitmap_init(rx_ring_info->rx_ring_struct->ring_size *
 225                                     AGG_RING_SIZE_FACTOR, (uint8_t *)mz->addr +
 226                                     ag_bitmap_start, ag_bitmap_len);
 227
 228                 /* TPA info */
 229                 if (rx_offloads & DEV_RX_OFFLOAD_TCP_LRO)
 230                         rx_ring_info->tpa_info =
 231                                 ((struct bnxt_tpa_info *)((char *)mz->addr +
 232                                                           tpa_info_start));
 233         }
 234
 235         cp_ring->bd = ((char *)mz->addr + cp_ring_start);
 236         cp_ring->bd_dma = mz_phys_addr + cp_ring_start;
 237         cp_ring_info->cp_desc_ring = cp_ring->bd;
 238         cp_ring_info->cp_desc_mapping = cp_ring->bd_dma;
 239         cp_ring->mem_zone = (const void *)mz;
 240
 241         if (!cp_ring->bd)
 242                 return -ENOMEM;
 243         if (cp_ring->vmem_size)
 244                 *cp_ring->vmem = ((char *)mz->addr + stats_len);
 245         if (stats_len) {
 246                 cp_ring_info->hw_stats = mz->addr;
 247                 cp_ring_info->hw_stats_map = mz_phys_addr;
 248         }
 249         cp_ring_info->hw_stats_ctx_id = HWRM_NA_SIGNATURE;
 250         return 0;
 251 }
 252
 253 /* ring_grp usage:
 254  * [0] = default completion ring
 255  * [1 -> +rx_cp_nr_rings] = rx_cp, rx rings
 256  * [1+rx_cp_nr_rings + 1 -> +tx_cp_nr_rings] = tx_cp, tx rings
 257  */
 258 int bnxt_alloc_hwrm_rings(struct bnxt *bp)
 259 {
 260         struct rte_pci_device *pci_dev = bp->pdev;
 261         unsigned int i;
 262         int rc = 0;
 263
 264         for (i = 0; i < bp->rx_cp_nr_rings; i++) {
 265                 struct bnxt_rx_queue *rxq = bp->rx_queues[i];
 266                 struct bnxt_cp_ring_info *cpr = rxq->cp_ring;
 267                 struct bnxt_ring *cp_ring = cpr->cp_ring_struct;
 268                 struct bnxt_rx_ring_info *rxr = rxq->rx_ring;
 269                 struct bnxt_ring *ring = rxr->rx_ring_struct;
 270                 unsigned int idx = i + 1;
 271                 unsigned int map_idx = idx + bp->rx_cp_nr_rings;
 272
 273                 bp->grp_info[i].fw_stats_ctx = cpr->hw_stats_ctx_id;
 274
 275                 /* Rx cmpl */
 276                 rc = bnxt_hwrm_ring_alloc(bp, cp_ring,
 277                                         HWRM_RING_ALLOC_INPUT_RING_TYPE_L2_CMPL,
 278                                         idx, HWRM_NA_SIGNATURE,
 279                                         HWRM_NA_SIGNATURE);
 280                 if (rc)
 281                         goto err_out;
 282                 cpr->cp_doorbell = (char *)pci_dev->mem_resource[2].addr +
 283                     idx * 0x80;
 284                 bp->grp_info[i].cp_fw_ring_id = cp_ring->fw_ring_id;
 285                 B_CP_DIS_DB(cpr, cpr->cp_raw_cons);
 286
 287                 /* Rx ring */
 288                 rc = bnxt_hwrm_ring_alloc(bp, ring,
 289                                         HWRM_RING_ALLOC_INPUT_RING_TYPE_RX,
 290                                         idx, cpr->hw_stats_ctx_id,
 291                                         cp_ring->fw_ring_id);
 292                 if (rc)
 293                         goto err_out;
 294                 rxr->rx_prod = 0;
 295                 rxr->rx_doorbell = (char *)pci_dev->mem_resource[2].addr +
 296                     idx * 0x80;
 297                 bp->grp_info[i].rx_fw_ring_id = ring->fw_ring_id;
 298                 B_RX_DB(rxr->rx_doorbell, rxr->rx_prod);
 299
 300                 ring = rxr->ag_ring_struct;
 301                 /* Agg ring */
 302                 if (ring == NULL) {
 303                         PMD_DRV_LOG(ERR, "Alloc AGG Ring is NULL!\n");
 304                         goto err_out;
 305                 }
 306
 307                 rc = bnxt_hwrm_ring_alloc(bp, ring,
 308                                 HWRM_RING_ALLOC_INPUT_RING_TYPE_RX,
 309                                 map_idx, HWRM_NA_SIGNATURE,
 310                                 cp_ring->fw_ring_id);
 311                 if (rc)
 312                         goto err_out;
 313                 PMD_DRV_LOG(DEBUG, "Alloc AGG Done!\n");
 314                 rxr->ag_prod = 0;
 315                 rxr->ag_doorbell =
 316                     (char *)pci_dev->mem_resource[2].addr +
 317                     map_idx * 0x80;
 318                 bp->grp_info[i].ag_fw_ring_id = ring->fw_ring_id;
 319                 B_RX_DB(rxr->ag_doorbell, rxr->ag_prod);
 320
 321                 rxq->rx_buf_use_size = BNXT_MAX_MTU + ETHER_HDR_LEN +
 322                                         ETHER_CRC_LEN + (2 * VLAN_TAG_SIZE);
 323                 if (bnxt_init_one_rx_ring(rxq)) {
 324                         PMD_DRV_LOG(ERR, "bnxt_init_one_rx_ring failed!\n");
 325                         bnxt_rx_queue_release_op(rxq);
 326                         return -ENOMEM;
 327                 }
 328                 B_RX_DB(rxr->rx_doorbell, rxr->rx_prod);
 329                 B_RX_DB(rxr->ag_doorbell, rxr->ag_prod);
 330                 rxq->index = idx;
 331         }
 332
 333         for (i = 0; i < bp->tx_cp_nr_rings; i++) {
 334                 struct bnxt_tx_queue *txq = bp->tx_queues[i];
 335                 struct bnxt_cp_ring_info *cpr = txq->cp_ring;
 336                 struct bnxt_ring *cp_ring = cpr->cp_ring_struct;
 337                 struct bnxt_tx_ring_info *txr = txq->tx_ring;
 338                 struct bnxt_ring *ring = txr->tx_ring_struct;
 339                 unsigned int idx = i + 1 + bp->rx_cp_nr_rings;
 340
 341                 /* Tx cmpl */
 342                 rc = bnxt_hwrm_ring_alloc(bp, cp_ring,
 343                                         HWRM_RING_ALLOC_INPUT_RING_TYPE_L2_CMPL,
 344                                         idx, HWRM_NA_SIGNATURE,
 345                                         HWRM_NA_SIGNATURE);
 346                 if (rc)
 347                         goto err_out;
 348
 349                 cpr->cp_doorbell = (char *)pci_dev->mem_resource[2].addr +
 350                     idx * 0x80;
 351                 B_CP_DIS_DB(cpr, cpr->cp_raw_cons);
 352
 353                 /* Tx ring */
 354                 rc = bnxt_hwrm_ring_alloc(bp, ring,
 355                                         HWRM_RING_ALLOC_INPUT_RING_TYPE_TX,
 356                                         idx, cpr->hw_stats_ctx_id,
 357                                         cp_ring->fw_ring_id);
 358                 if (rc)
 359                         goto err_out;
 360
 361                 txr->tx_doorbell = (char *)pci_dev->mem_resource[2].addr +
 362                     idx * 0x80;
 363                 txq->index = idx;
 364         }
 365
 366 err_out:
 367         return rc;
 368 }