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)
  28                 return;
  29
  30         if (ring->vmem_size && *ring->vmem) {
  31                 memset((char *)*ring->vmem, 0, ring->vmem_size);
  32                 *ring->vmem = NULL;
  33         }
  34         ring->mem_zone = NULL;
  35 }
  36
  37 /*
  38  * Ring groups
  39  */
  40
  41 int bnxt_init_ring_grps(struct bnxt *bp)
  42 {
  43         unsigned int i;
  44
  45         for (i = 0; i < bp->max_ring_grps; i++)
  46                 memset(&bp->grp_info[i], (uint8_t)HWRM_NA_SIGNATURE,
  47                        sizeof(struct bnxt_ring_grp_info));
  48
  49         return 0;
  50 }
  51
  52 /*
  53  * Allocates a completion ring with vmem and stats optionally also allocating
  54  * a TX and/or RX ring.  Passing NULL as tx_ring_info and/or rx_ring_info
  55  * to not allocate them.
  56  *
  57  * Order in the allocation is:
  58  * stats - Always non-zero length
  59  * cp vmem - Always zero-length, supported for the bnxt_ring abstraction
  60  * tx vmem - Only non-zero length if tx_ring_info is not NULL
  61  * rx vmem - Only non-zero length if rx_ring_info is not NULL
  62  * cp bd ring - Always non-zero length
  63  * tx bd ring - Only non-zero length if tx_ring_info is not NULL
  64  * rx bd ring - Only non-zero length if rx_ring_info is not NULL
  65  */
  66 int bnxt_alloc_rings(struct bnxt *bp, uint16_t qidx,
  67                             struct bnxt_tx_queue *txq,
  68                             struct bnxt_rx_queue *rxq,
  69                             struct bnxt_cp_ring_info *cp_ring_info,
  70                             const char *suffix)
  71 {
  72         struct bnxt_ring *cp_ring = cp_ring_info->cp_ring_struct;
  73         struct bnxt_rx_ring_info *rx_ring_info = rxq ? rxq->rx_ring : NULL;
  74         struct bnxt_tx_ring_info *tx_ring_info = txq ? txq->tx_ring : NULL;
  75         struct bnxt_ring *tx_ring;
  76         struct bnxt_ring *rx_ring;
  77         struct rte_pci_device *pdev = bp->pdev;
  78         uint64_t rx_offloads = bp->eth_dev->data->dev_conf.rxmode.offloads;
  79         const struct rte_memzone *mz = NULL;
  80         char mz_name[RTE_MEMZONE_NAMESIZE];
  81         rte_iova_t mz_phys_addr;
  82         int sz;
  83
  84         int stats_len = (tx_ring_info || rx_ring_info) ?
  85             RTE_CACHE_LINE_ROUNDUP(sizeof(struct ctx_hw_stats64)) : 0;
  86
  87         int cp_vmem_start = stats_len;
  88         int cp_vmem_len = RTE_CACHE_LINE_ROUNDUP(cp_ring->vmem_size);
  89
  90         int tx_vmem_start = cp_vmem_start + cp_vmem_len;
  91         int tx_vmem_len =
  92             tx_ring_info ? RTE_CACHE_LINE_ROUNDUP(tx_ring_info->
  93                                                 tx_ring_struct->vmem_size) : 0;
  94
  95         int rx_vmem_start = tx_vmem_start + tx_vmem_len;
  96         int rx_vmem_len = rx_ring_info ?
  97                 RTE_CACHE_LINE_ROUNDUP(rx_ring_info->
  98                                                 rx_ring_struct->vmem_size) : 0;
  99         int ag_vmem_start = 0;
 100         int ag_vmem_len = 0;
 101         int cp_ring_start =  0;
 102
 103         ag_vmem_start = rx_vmem_start + rx_vmem_len;
 104         ag_vmem_len = rx_ring_info ? RTE_CACHE_LINE_ROUNDUP(
 105                                 rx_ring_info->ag_ring_struct->vmem_size) : 0;
 106         cp_ring_start = ag_vmem_start + ag_vmem_len;
 107
 108         int cp_ring_len = RTE_CACHE_LINE_ROUNDUP(cp_ring->ring_size *
 109                                                  sizeof(struct cmpl_base));
 110
 111         int tx_ring_start = cp_ring_start + cp_ring_len;
 112         int tx_ring_len = tx_ring_info ?
 113             RTE_CACHE_LINE_ROUNDUP(tx_ring_info->tx_ring_struct->ring_size *
 114                                    sizeof(struct tx_bd_long)) : 0;
 115
 116         int rx_ring_start = tx_ring_start + tx_ring_len;
 117         int rx_ring_len =  rx_ring_info ?
 118                 RTE_CACHE_LINE_ROUNDUP(rx_ring_info->rx_ring_struct->ring_size *
 119                 sizeof(struct rx_prod_pkt_bd)) : 0;
 120
 121         int ag_ring_start = rx_ring_start + rx_ring_len;
 122         int ag_ring_len = rx_ring_len * AGG_RING_SIZE_FACTOR;
 123
 124         int ag_bitmap_start = ag_ring_start + ag_ring_len;
 125         int ag_bitmap_len =  rx_ring_info ?
 126                 RTE_CACHE_LINE_ROUNDUP(rte_bitmap_get_memory_footprint(
 127                         rx_ring_info->rx_ring_struct->ring_size *
 128                         AGG_RING_SIZE_FACTOR)) : 0;
 129
 130         int tpa_info_start = ag_bitmap_start + ag_bitmap_len;
 131         int tpa_info_len = rx_ring_info ?
 132                 RTE_CACHE_LINE_ROUNDUP(BNXT_TPA_MAX *
 133                                        sizeof(struct bnxt_tpa_info)) : 0;
 134
 135         int total_alloc_len = tpa_info_start;
 136         if (rx_offloads & DEV_RX_OFFLOAD_TCP_LRO)
 137                 total_alloc_len += tpa_info_len;
 138
 139         snprintf(mz_name, RTE_MEMZONE_NAMESIZE,
 140                  "bnxt_%04x:%02x:%02x:%02x-%04x_%s", pdev->addr.domain,
 141                  pdev->addr.bus, pdev->addr.devid, pdev->addr.function, qidx,
 142                  suffix);
 143         mz_name[RTE_MEMZONE_NAMESIZE - 1] = 0;
 144         mz = rte_memzone_lookup(mz_name);
 145         if (!mz) {
 146                 mz = rte_memzone_reserve_aligned(mz_name, total_alloc_len,
 147                                 SOCKET_ID_ANY,
 148                                 RTE_MEMZONE_2MB |
 149                                 RTE_MEMZONE_SIZE_HINT_ONLY |
 150                                 RTE_MEMZONE_IOVA_CONTIG,
 151                                 getpagesize());
 152                 if (mz == NULL)
 153                         return -ENOMEM;
 154         }
 155         memset(mz->addr, 0, mz->len);
 156         mz_phys_addr = mz->iova;
 157         if ((unsigned long)mz->addr == mz_phys_addr) {
 158                 PMD_DRV_LOG(WARNING,
 159                         "Memzone physical address same as virtual.\n");
 160                 PMD_DRV_LOG(WARNING,
 161                         "Using rte_mem_virt2iova()\n");
 162                 for (sz = 0; sz < total_alloc_len; sz += getpagesize())
 163                         rte_mem_lock_page(((char *)mz->addr) + sz);
 164                 mz_phys_addr = rte_mem_virt2iova(mz->addr);
 165                 if (mz_phys_addr == 0) {
 166                         PMD_DRV_LOG(ERR,
 167                         "unable to map ring address to physical memory\n");
 168                         return -ENOMEM;
 169                 }
 170         }
 171
 172         if (tx_ring_info) {
 173                 txq->mz = mz;
 174                 tx_ring = tx_ring_info->tx_ring_struct;
 175
 176                 tx_ring->bd = ((char *)mz->addr + tx_ring_start);
 177                 tx_ring_info->tx_desc_ring = (struct tx_bd_long *)tx_ring->bd;
 178                 tx_ring->bd_dma = mz_phys_addr + tx_ring_start;
 179                 tx_ring_info->tx_desc_mapping = tx_ring->bd_dma;
 180                 tx_ring->mem_zone = (const void *)mz;
 181
 182                 if (!tx_ring->bd)
 183                         return -ENOMEM;
 184                 if (tx_ring->vmem_size) {
 185                         tx_ring->vmem =
 186                             (void **)((char *)mz->addr + tx_vmem_start);
 187                         tx_ring_info->tx_buf_ring =
 188                             (struct bnxt_sw_tx_bd *)tx_ring->vmem;
 189                 }
 190         }
 191
 192         if (rx_ring_info) {
 193                 rxq->mz = mz;
 194                 rx_ring = rx_ring_info->rx_ring_struct;
 195
 196                 rx_ring->bd = ((char *)mz->addr + rx_ring_start);
 197                 rx_ring_info->rx_desc_ring =
 198                     (struct rx_prod_pkt_bd *)rx_ring->bd;
 199                 rx_ring->bd_dma = mz_phys_addr + rx_ring_start;
 200                 rx_ring_info->rx_desc_mapping = rx_ring->bd_dma;
 201                 rx_ring->mem_zone = (const void *)mz;
 202
 203                 if (!rx_ring->bd)
 204                         return -ENOMEM;
 205                 if (rx_ring->vmem_size) {
 206                         rx_ring->vmem =
 207                             (void **)((char *)mz->addr + rx_vmem_start);
 208                         rx_ring_info->rx_buf_ring =
 209                             (struct bnxt_sw_rx_bd *)rx_ring->vmem;
 210                 }
 211
 212                 rx_ring = rx_ring_info->ag_ring_struct;
 213
 214                 rx_ring->bd = ((char *)mz->addr + ag_ring_start);
 215                 rx_ring_info->ag_desc_ring =
 216                     (struct rx_prod_pkt_bd *)rx_ring->bd;
 217                 rx_ring->bd_dma = mz->iova + ag_ring_start;
 218                 rx_ring_info->ag_desc_mapping = rx_ring->bd_dma;
 219                 rx_ring->mem_zone = (const void *)mz;
 220
 221                 if (!rx_ring->bd)
 222                         return -ENOMEM;
 223                 if (rx_ring->vmem_size) {
 224                         rx_ring->vmem =
 225                             (void **)((char *)mz->addr + ag_vmem_start);
 226                         rx_ring_info->ag_buf_ring =
 227                             (struct bnxt_sw_rx_bd *)rx_ring->vmem;
 228                 }
 229
 230                 rx_ring_info->ag_bitmap =
 231                     rte_bitmap_init(rx_ring_info->rx_ring_struct->ring_size *
 232                                     AGG_RING_SIZE_FACTOR, (uint8_t *)mz->addr +
 233                                     ag_bitmap_start, ag_bitmap_len);
 234
 235                 /* TPA info */
 236                 if (rx_offloads & DEV_RX_OFFLOAD_TCP_LRO)
 237                         rx_ring_info->tpa_info =
 238                                 ((struct bnxt_tpa_info *)((char *)mz->addr +
 239                                                           tpa_info_start));
 240         }
 241
 242         cp_ring->bd = ((char *)mz->addr + cp_ring_start);
 243         cp_ring->bd_dma = mz_phys_addr + cp_ring_start;
 244         cp_ring_info->cp_desc_ring = cp_ring->bd;
 245         cp_ring_info->cp_desc_mapping = cp_ring->bd_dma;
 246         cp_ring->mem_zone = (const void *)mz;
 247
 248         if (!cp_ring->bd)
 249                 return -ENOMEM;
 250         if (cp_ring->vmem_size)
 251                 *cp_ring->vmem = ((char *)mz->addr + stats_len);
 252         if (stats_len) {
 253                 cp_ring_info->hw_stats = mz->addr;
 254                 cp_ring_info->hw_stats_map = mz_phys_addr;
 255         }
 256         cp_ring_info->hw_stats_ctx_id = HWRM_NA_SIGNATURE;
 257         return 0;
 258 }
 259
 260 /* ring_grp usage:
 261  * [0] = default completion ring
 262  * [1 -> +rx_cp_nr_rings] = rx_cp, rx rings
 263  * [1+rx_cp_nr_rings + 1 -> +tx_cp_nr_rings] = tx_cp, tx rings
 264  */
 265 int bnxt_alloc_hwrm_rings(struct bnxt *bp)
 266 {
 267         unsigned int i;
 268         int rc = 0;
 269
 270         for (i = 0; i < bp->rx_cp_nr_rings; i++) {
 271                 struct bnxt_rx_queue *rxq = bp->rx_queues[i];
 272                 struct bnxt_cp_ring_info *cpr = rxq->cp_ring;
 273                 struct bnxt_ring *cp_ring = cpr->cp_ring_struct;
 274                 struct bnxt_rx_ring_info *rxr = rxq->rx_ring;
 275                 struct bnxt_ring *ring = rxr->rx_ring_struct;
 276                 unsigned int idx = i + 1;
 277                 unsigned int map_idx = idx + bp->rx_cp_nr_rings;
 278
 279                 bp->grp_info[i].fw_stats_ctx = cpr->hw_stats_ctx_id;
 280
 281                 /* Rx 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                                         HWRM_NA_SIGNATURE);
 286                 if (rc)
 287                         goto err_out;
 288                 cpr->cp_doorbell = (char *)bp->doorbell_base + idx * 0x80;
 289                 bp->grp_info[i].cp_fw_ring_id = cp_ring->fw_ring_id;
 290                 B_CP_DIS_DB(cpr, cpr->cp_raw_cons);
 291
 292                 /* Rx ring */
 293                 rc = bnxt_hwrm_ring_alloc(bp, ring,
 294                                         HWRM_RING_ALLOC_INPUT_RING_TYPE_RX,
 295                                         idx, cpr->hw_stats_ctx_id,
 296                                         cp_ring->fw_ring_id);
 297                 if (rc)
 298                         goto err_out;
 299                 rxr->rx_prod = 0;
 300                 rxr->rx_doorbell = (char *)bp->doorbell_base + idx * 0x80;
 301                 bp->grp_info[i].rx_fw_ring_id = ring->fw_ring_id;
 302                 B_RX_DB(rxr->rx_doorbell, rxr->rx_prod);
 303
 304                 ring = rxr->ag_ring_struct;
 305                 /* Agg ring */
 306                 if (ring == NULL) {
 307                         PMD_DRV_LOG(ERR, "Alloc AGG Ring is NULL!\n");
 308                         goto err_out;
 309                 }
 310
 311                 rc = bnxt_hwrm_ring_alloc(bp, ring,
 312                                 HWRM_RING_ALLOC_INPUT_RING_TYPE_RX,
 313                                 map_idx, HWRM_NA_SIGNATURE,
 314                                 cp_ring->fw_ring_id);
 315                 if (rc)
 316                         goto err_out;
 317                 PMD_DRV_LOG(DEBUG, "Alloc AGG Done!\n");
 318                 rxr->ag_prod = 0;
 319                 rxr->ag_doorbell = (char *)bp->doorbell_base + map_idx * 0x80;
 320                 bp->grp_info[i].ag_fw_ring_id = ring->fw_ring_id;
 321                 B_RX_DB(rxr->ag_doorbell, rxr->ag_prod);
 322
 323                 rxq->rx_buf_use_size = BNXT_MAX_MTU + ETHER_HDR_LEN +
 324                                         ETHER_CRC_LEN + (2 * VLAN_TAG_SIZE);
 325                 if (bnxt_init_one_rx_ring(rxq)) {
 326                         PMD_DRV_LOG(ERR, "bnxt_init_one_rx_ring failed!\n");
 327                         bnxt_rx_queue_release_op(rxq);
 328                         return -ENOMEM;
 329                 }
 330                 B_RX_DB(rxr->rx_doorbell, rxr->rx_prod);
 331                 B_RX_DB(rxr->ag_doorbell, rxr->ag_prod);
 332                 rxq->index = idx;
 333         }
 334
 335         for (i = 0; i < bp->tx_cp_nr_rings; i++) {
 336                 struct bnxt_tx_queue *txq = bp->tx_queues[i];
 337                 struct bnxt_cp_ring_info *cpr = txq->cp_ring;
 338                 struct bnxt_ring *cp_ring = cpr->cp_ring_struct;
 339                 struct bnxt_tx_ring_info *txr = txq->tx_ring;
 340                 struct bnxt_ring *ring = txr->tx_ring_struct;
 341                 unsigned int idx = i + 1 + bp->rx_cp_nr_rings;
 342
 343                 /* Tx cmpl */
 344                 rc = bnxt_hwrm_ring_alloc(bp, cp_ring,
 345                                         HWRM_RING_ALLOC_INPUT_RING_TYPE_L2_CMPL,
 346                                         idx, HWRM_NA_SIGNATURE,
 347                                         HWRM_NA_SIGNATURE);
 348                 if (rc)
 349                         goto err_out;
 350
 351                 cpr->cp_doorbell = (char *)bp->doorbell_base + idx * 0x80;
 352                 B_CP_DIS_DB(cpr, cpr->cp_raw_cons);
 353
 354                 /* Tx ring */
 355                 rc = bnxt_hwrm_ring_alloc(bp, ring,
 356                                         HWRM_RING_ALLOC_INPUT_RING_TYPE_TX,
 357                                         idx, cpr->hw_stats_ctx_id,
 358                                         cp_ring->fw_ring_id);
 359                 if (rc)
 360                         goto err_out;
 361
 362                 txr->tx_doorbell = (char *)bp->doorbell_base + idx * 0x80;
 363                 txq->index = idx;
 364         }
 365
 366 err_out:
 367         return rc;
 368 }