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         ring->mem_zone = NULL;
  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_queue *txq,
  65                             struct bnxt_rx_queue *rxq,
  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_rx_ring_info *rx_ring_info = rxq ? rxq->rx_ring : NULL;
  71         struct bnxt_tx_ring_info *tx_ring_info = txq ? txq->tx_ring : NULL;
  72         struct bnxt_ring *tx_ring;
  73         struct bnxt_ring *rx_ring;
  74         struct rte_pci_device *pdev = bp->pdev;
  75         uint64_t rx_offloads = bp->eth_dev->data->dev_conf.rxmode.offloads;
  76         const struct rte_memzone *mz = NULL;
  77         char mz_name[RTE_MEMZONE_NAMESIZE];
  78         rte_iova_t mz_phys_addr;
  79         int sz;
  80
  81         int stats_len = (tx_ring_info || rx_ring_info) ?
  82             RTE_CACHE_LINE_ROUNDUP(sizeof(struct ctx_hw_stats64)) : 0;
  83
  84         int cp_vmem_start = stats_len;
  85         int cp_vmem_len = RTE_CACHE_LINE_ROUNDUP(cp_ring->vmem_size);
  86
  87         int tx_vmem_start = cp_vmem_start + cp_vmem_len;
  88         int tx_vmem_len =
  89             tx_ring_info ? RTE_CACHE_LINE_ROUNDUP(tx_ring_info->
  90                                                 tx_ring_struct->vmem_size) : 0;
  91
  92         int rx_vmem_start = tx_vmem_start + tx_vmem_len;
  93         int rx_vmem_len = rx_ring_info ?
  94                 RTE_CACHE_LINE_ROUNDUP(rx_ring_info->
  95                                                 rx_ring_struct->vmem_size) : 0;
  96         int ag_vmem_start = 0;
  97         int ag_vmem_len = 0;
  98         int cp_ring_start =  0;
  99
 100         ag_vmem_start = rx_vmem_start + rx_vmem_len;
 101         ag_vmem_len = rx_ring_info ? RTE_CACHE_LINE_ROUNDUP(
 102                                 rx_ring_info->ag_ring_struct->vmem_size) : 0;
 103         cp_ring_start = ag_vmem_start + ag_vmem_len;
 104
 105         int cp_ring_len = RTE_CACHE_LINE_ROUNDUP(cp_ring->ring_size *
 106                                                  sizeof(struct cmpl_base));
 107
 108         int tx_ring_start = cp_ring_start + cp_ring_len;
 109         int tx_ring_len = tx_ring_info ?
 110             RTE_CACHE_LINE_ROUNDUP(tx_ring_info->tx_ring_struct->ring_size *
 111                                    sizeof(struct tx_bd_long)) : 0;
 112
 113         int rx_ring_start = tx_ring_start + tx_ring_len;
 114         int rx_ring_len =  rx_ring_info ?
 115                 RTE_CACHE_LINE_ROUNDUP(rx_ring_info->rx_ring_struct->ring_size *
 116                 sizeof(struct rx_prod_pkt_bd)) : 0;
 117
 118         int ag_ring_start = rx_ring_start + rx_ring_len;
 119         int ag_ring_len = rx_ring_len * AGG_RING_SIZE_FACTOR;
 120
 121         int ag_bitmap_start = ag_ring_start + ag_ring_len;
 122         int ag_bitmap_len =  rx_ring_info ?
 123                 RTE_CACHE_LINE_ROUNDUP(rte_bitmap_get_memory_footprint(
 124                         rx_ring_info->rx_ring_struct->ring_size *
 125                         AGG_RING_SIZE_FACTOR)) : 0;
 126
 127         int tpa_info_start = ag_bitmap_start + ag_bitmap_len;
 128         int tpa_info_len = rx_ring_info ?
 129                 RTE_CACHE_LINE_ROUNDUP(BNXT_TPA_MAX *
 130                                        sizeof(struct bnxt_tpa_info)) : 0;
 131
 132         int total_alloc_len = tpa_info_start;
 133         if (rx_offloads & DEV_RX_OFFLOAD_TCP_LRO)
 134                 total_alloc_len += tpa_info_len;
 135
 136         snprintf(mz_name, RTE_MEMZONE_NAMESIZE,
 137                  "bnxt_%04x:%02x:%02x:%02x-%04x_%s", pdev->addr.domain,
 138                  pdev->addr.bus, pdev->addr.devid, pdev->addr.function, qidx,
 139                  suffix);
 140         mz_name[RTE_MEMZONE_NAMESIZE - 1] = 0;
 141         mz = rte_memzone_lookup(mz_name);
 142         if (!mz) {
 143                 mz = rte_memzone_reserve_aligned(mz_name, total_alloc_len,
 144                                 SOCKET_ID_ANY,
 145                                 RTE_MEMZONE_2MB |
 146                                 RTE_MEMZONE_SIZE_HINT_ONLY |
 147                                 RTE_MEMZONE_IOVA_CONTIG,
 148                                 getpagesize());
 149                 if (mz == NULL)
 150                         return -ENOMEM;
 151         }
 152         memset(mz->addr, 0, mz->len);
 153         mz_phys_addr = mz->iova;
 154         if ((unsigned long)mz->addr == mz_phys_addr) {
 155                 PMD_DRV_LOG(WARNING,
 156                         "Memzone physical address same as virtual.\n");
 157                 PMD_DRV_LOG(WARNING,
 158                         "Using rte_mem_virt2iova()\n");
 159                 for (sz = 0; sz < total_alloc_len; sz += getpagesize())
 160                         rte_mem_lock_page(((char *)mz->addr) + sz);
 161                 mz_phys_addr = rte_mem_virt2iova(mz->addr);
 162                 if (mz_phys_addr == 0) {
 163                         PMD_DRV_LOG(ERR,
 164                         "unable to map ring address to physical memory\n");
 165                         return -ENOMEM;
 166                 }
 167         }
 168
 169         if (tx_ring_info) {
 170                 txq->mz = mz;
 171                 tx_ring = tx_ring_info->tx_ring_struct;
 172
 173                 tx_ring->bd = ((char *)mz->addr + tx_ring_start);
 174                 tx_ring_info->tx_desc_ring = (struct tx_bd_long *)tx_ring->bd;
 175                 tx_ring->bd_dma = mz_phys_addr + tx_ring_start;
 176                 tx_ring_info->tx_desc_mapping = tx_ring->bd_dma;
 177                 tx_ring->mem_zone = (const void *)mz;
 178
 179                 if (!tx_ring->bd)
 180                         return -ENOMEM;
 181                 if (tx_ring->vmem_size) {
 182                         tx_ring->vmem =
 183                             (void **)((char *)mz->addr + tx_vmem_start);
 184                         tx_ring_info->tx_buf_ring =
 185                             (struct bnxt_sw_tx_bd *)tx_ring->vmem;
 186                 }
 187         }
 188
 189         if (rx_ring_info) {
 190                 rxq->mz = mz;
 191                 rx_ring = rx_ring_info->rx_ring_struct;
 192
 193                 rx_ring->bd = ((char *)mz->addr + rx_ring_start);
 194                 rx_ring_info->rx_desc_ring =
 195                     (struct rx_prod_pkt_bd *)rx_ring->bd;
 196                 rx_ring->bd_dma = mz_phys_addr + rx_ring_start;
 197                 rx_ring_info->rx_desc_mapping = rx_ring->bd_dma;
 198                 rx_ring->mem_zone = (const void *)mz;
 199
 200                 if (!rx_ring->bd)
 201                         return -ENOMEM;
 202                 if (rx_ring->vmem_size) {
 203                         rx_ring->vmem =
 204                             (void **)((char *)mz->addr + rx_vmem_start);
 205                         rx_ring_info->rx_buf_ring =
 206                             (struct bnxt_sw_rx_bd *)rx_ring->vmem;
 207                 }
 208
 209                 rx_ring = rx_ring_info->ag_ring_struct;
 210
 211                 rx_ring->bd = ((char *)mz->addr + ag_ring_start);
 212                 rx_ring_info->ag_desc_ring =
 213                     (struct rx_prod_pkt_bd *)rx_ring->bd;
 214                 rx_ring->bd_dma = mz->iova + ag_ring_start;
 215                 rx_ring_info->ag_desc_mapping = rx_ring->bd_dma;
 216                 rx_ring->mem_zone = (const void *)mz;
 217
 218                 if (!rx_ring->bd)
 219                         return -ENOMEM;
 220                 if (rx_ring->vmem_size) {
 221                         rx_ring->vmem =
 222                             (void **)((char *)mz->addr + ag_vmem_start);
 223                         rx_ring_info->ag_buf_ring =
 224                             (struct bnxt_sw_rx_bd *)rx_ring->vmem;
 225                 }
 226
 227                 rx_ring_info->ag_bitmap =
 228                     rte_bitmap_init(rx_ring_info->rx_ring_struct->ring_size *
 229                                     AGG_RING_SIZE_FACTOR, (uint8_t *)mz->addr +
 230                                     ag_bitmap_start, ag_bitmap_len);
 231
 232                 /* TPA info */
 233                 if (rx_offloads & DEV_RX_OFFLOAD_TCP_LRO)
 234                         rx_ring_info->tpa_info =
 235                                 ((struct bnxt_tpa_info *)((char *)mz->addr +
 236                                                           tpa_info_start));
 237         }
 238
 239         cp_ring->bd = ((char *)mz->addr + cp_ring_start);
 240         cp_ring->bd_dma = mz_phys_addr + cp_ring_start;
 241         cp_ring_info->cp_desc_ring = cp_ring->bd;
 242         cp_ring_info->cp_desc_mapping = cp_ring->bd_dma;
 243         cp_ring->mem_zone = (const void *)mz;
 244
 245         if (!cp_ring->bd)
 246                 return -ENOMEM;
 247         if (cp_ring->vmem_size)
 248                 *cp_ring->vmem = ((char *)mz->addr + stats_len);
 249         if (stats_len) {
 250                 cp_ring_info->hw_stats = mz->addr;
 251                 cp_ring_info->hw_stats_map = mz_phys_addr;
 252         }
 253         cp_ring_info->hw_stats_ctx_id = HWRM_NA_SIGNATURE;
 254         return 0;
 255 }
 256
 257 /* ring_grp usage:
 258  * [0] = default completion ring
 259  * [1 -> +rx_cp_nr_rings] = rx_cp, rx rings
 260  * [1+rx_cp_nr_rings + 1 -> +tx_cp_nr_rings] = tx_cp, tx rings
 261  */
 262 int bnxt_alloc_hwrm_rings(struct bnxt *bp)
 263 {
 264         unsigned int i;
 265         int rc = 0;
 266
 267         for (i = 0; i < bp->rx_cp_nr_rings; i++) {
 268                 struct bnxt_rx_queue *rxq = bp->rx_queues[i];
 269                 struct bnxt_cp_ring_info *cpr = rxq->cp_ring;
 270                 struct bnxt_ring *cp_ring = cpr->cp_ring_struct;
 271                 struct bnxt_rx_ring_info *rxr = rxq->rx_ring;
 272                 struct bnxt_ring *ring = rxr->rx_ring_struct;
 273                 unsigned int idx = i + 1;
 274                 unsigned int map_idx = idx + bp->rx_cp_nr_rings;
 275
 276                 bp->grp_info[i].fw_stats_ctx = cpr->hw_stats_ctx_id;
 277
 278                 /* Rx cmpl */
 279                 rc = bnxt_hwrm_ring_alloc(bp, cp_ring,
 280                                         HWRM_RING_ALLOC_INPUT_RING_TYPE_L2_CMPL,
 281                                         idx, HWRM_NA_SIGNATURE,
 282                                         HWRM_NA_SIGNATURE);
 283                 if (rc)
 284                         goto err_out;
 285                 cpr->cp_doorbell = (char *)bp->doorbell_base + idx * 0x80;
 286                 bp->grp_info[i].cp_fw_ring_id = cp_ring->fw_ring_id;
 287                 B_CP_DIS_DB(cpr, cpr->cp_raw_cons);
 288
 289                 /* Rx ring */
 290                 rc = bnxt_hwrm_ring_alloc(bp, ring,
 291                                         HWRM_RING_ALLOC_INPUT_RING_TYPE_RX,
 292                                         idx, cpr->hw_stats_ctx_id,
 293                                         cp_ring->fw_ring_id);
 294                 if (rc)
 295                         goto err_out;
 296                 rxr->rx_prod = 0;
 297                 rxr->rx_doorbell = (char *)bp->doorbell_base + idx * 0x80;
 298                 bp->grp_info[i].rx_fw_ring_id = ring->fw_ring_id;
 299                 B_RX_DB(rxr->rx_doorbell, rxr->rx_prod);
 300
 301                 ring = rxr->ag_ring_struct;
 302                 /* Agg ring */
 303                 if (ring == NULL) {
 304                         PMD_DRV_LOG(ERR, "Alloc AGG Ring is NULL!\n");
 305                         goto err_out;
 306                 }
 307
 308                 rc = bnxt_hwrm_ring_alloc(bp, ring,
 309                                 HWRM_RING_ALLOC_INPUT_RING_TYPE_RX,
 310                                 map_idx, HWRM_NA_SIGNATURE,
 311                                 cp_ring->fw_ring_id);
 312                 if (rc)
 313                         goto err_out;
 314                 PMD_DRV_LOG(DEBUG, "Alloc AGG Done!\n");
 315                 rxr->ag_prod = 0;
 316                 rxr->ag_doorbell = (char *)bp->doorbell_base + map_idx * 0x80;
 317                 bp->grp_info[i].ag_fw_ring_id = ring->fw_ring_id;
 318                 B_RX_DB(rxr->ag_doorbell, rxr->ag_prod);
 319
 320                 rxq->rx_buf_use_size = BNXT_MAX_MTU + ETHER_HDR_LEN +
 321                                         ETHER_CRC_LEN + (2 * VLAN_TAG_SIZE);
 322                 if (bnxt_init_one_rx_ring(rxq)) {
 323                         PMD_DRV_LOG(ERR, "bnxt_init_one_rx_ring failed!\n");
 324                         bnxt_rx_queue_release_op(rxq);
 325                         return -ENOMEM;
 326                 }
 327                 B_RX_DB(rxr->rx_doorbell, rxr->rx_prod);
 328                 B_RX_DB(rxr->ag_doorbell, rxr->ag_prod);
 329                 rxq->index = idx;
 330         }
 331
 332         for (i = 0; i < bp->tx_cp_nr_rings; i++) {
 333                 struct bnxt_tx_queue *txq = bp->tx_queues[i];
 334                 struct bnxt_cp_ring_info *cpr = txq->cp_ring;
 335                 struct bnxt_ring *cp_ring = cpr->cp_ring_struct;
 336                 struct bnxt_tx_ring_info *txr = txq->tx_ring;
 337                 struct bnxt_ring *ring = txr->tx_ring_struct;
 338                 unsigned int idx = i + 1 + bp->rx_cp_nr_rings;
 339
 340                 /* Tx cmpl */
 341                 rc = bnxt_hwrm_ring_alloc(bp, cp_ring,
 342                                         HWRM_RING_ALLOC_INPUT_RING_TYPE_L2_CMPL,
 343                                         idx, HWRM_NA_SIGNATURE,
 344                                         HWRM_NA_SIGNATURE);
 345                 if (rc)
 346                         goto err_out;
 347
 348                 cpr->cp_doorbell = (char *)bp->doorbell_base + idx * 0x80;
 349                 B_CP_DIS_DB(cpr, cpr->cp_raw_cons);
 350
 351                 /* Tx ring */
 352                 rc = bnxt_hwrm_ring_alloc(bp, ring,
 353                                         HWRM_RING_ALLOC_INPUT_RING_TYPE_TX,
 354                                         idx, cpr->hw_stats_ctx_id,
 355                                         cp_ring->fw_ring_id);
 356                 if (rc)
 357                         goto err_out;
 358
 359                 txr->tx_doorbell = (char *)bp->doorbell_base + idx * 0x80;
 360                 txq->index = idx;
 361         }
 362
 363 err_out:
 364         return rc;
 365 }