drivers/net/axgbe/axgbe_rxtx.c

   1 /*   SPDX-License-Identifier: BSD-3-Clause
   2  *   Copyright(c) 2018 Advanced Micro Devices, Inc. All rights reserved.
   3  *   Copyright(c) 2018 Synopsys, Inc. All rights reserved.
   4  */
   5
   6 #include "axgbe_ethdev.h"
   7 #include "axgbe_rxtx.h"
   8 #include "axgbe_phy.h"
   9
  10 #include <rte_time.h>
  11 #include <rte_mempool.h>
  12 #include <rte_mbuf.h>
  13 #include <rte_vect.h>
  14
  15 static void
  16 axgbe_rx_queue_release(struct axgbe_rx_queue *rx_queue)
  17 {
  18         uint16_t i;
  19         struct rte_mbuf **sw_ring;
  20
  21         if (rx_queue) {
  22                 sw_ring = rx_queue->sw_ring;
  23                 if (sw_ring) {
  24                         for (i = 0; i < rx_queue->nb_desc; i++) {
  25                                 if (sw_ring[i])
  26                                         rte_pktmbuf_free(sw_ring[i]);
  27                         }
  28                         rte_free(sw_ring);
  29                 }
  30                 rte_free(rx_queue);
  31         }
  32 }
  33
  34 void axgbe_dev_rx_queue_release(void *rxq)
  35 {
  36         axgbe_rx_queue_release(rxq);
  37 }
  38
  39 int axgbe_dev_rx_queue_setup(struct rte_eth_dev *dev, uint16_t queue_idx,
  40                              uint16_t nb_desc, unsigned int socket_id,
  41                              const struct rte_eth_rxconf *rx_conf,
  42                              struct rte_mempool *mp)
  43 {
  44         PMD_INIT_FUNC_TRACE();
  45         uint32_t size;
  46         const struct rte_memzone *dma;
  47         struct axgbe_rx_queue *rxq;
  48         uint32_t rx_desc = nb_desc;
  49         struct axgbe_port *pdata =  dev->data->dev_private;
  50
  51         /*
  52          * validate Rx descriptors count
  53          * should be power of 2 and less than h/w supported
  54          */
  55         if ((!rte_is_power_of_2(rx_desc)) ||
  56             rx_desc > pdata->rx_desc_count)
  57                 return -EINVAL;
  58         /* First allocate the rx queue data structure */
  59         rxq = rte_zmalloc_socket("ethdev RX queue",
  60                                  sizeof(struct axgbe_rx_queue),
  61                                  RTE_CACHE_LINE_SIZE, socket_id);
  62         if (!rxq) {
  63                 PMD_INIT_LOG(ERR, "rte_zmalloc for rxq failed!");
  64                 return -ENOMEM;
  65         }
  66
  67         rxq->cur = 0;
  68         rxq->dirty = 0;
  69         rxq->pdata = pdata;
  70         rxq->mb_pool = mp;
  71         rxq->queue_id = queue_idx;
  72         rxq->port_id = dev->data->port_id;
  73         rxq->nb_desc = rx_desc;
  74         rxq->dma_regs = (void *)((uint8_t *)pdata->xgmac_regs + DMA_CH_BASE +
  75                 (DMA_CH_INC * rxq->queue_id));
  76         rxq->dma_tail_reg = (volatile uint32_t *)((uint8_t *)rxq->dma_regs +
  77                                                   DMA_CH_RDTR_LO);
  78         if (dev->data->dev_conf.rxmode.offloads & DEV_RX_OFFLOAD_KEEP_CRC)
  79                 rxq->crc_len = RTE_ETHER_CRC_LEN;
  80         else
  81                 rxq->crc_len = 0;
  82
  83         /* CRC strip in AXGBE supports per port not per queue */
  84         pdata->crc_strip_enable = (rxq->crc_len == 0) ? 1 : 0;
  85         rxq->free_thresh = rx_conf->rx_free_thresh ?
  86                 rx_conf->rx_free_thresh : AXGBE_RX_FREE_THRESH;
  87         if (rxq->free_thresh >  rxq->nb_desc)
  88                 rxq->free_thresh = rxq->nb_desc >> 3;
  89
  90         /* Allocate RX ring hardware descriptors */
  91         size = rxq->nb_desc * sizeof(union axgbe_rx_desc);
  92         dma = rte_eth_dma_zone_reserve(dev, "rx_ring", queue_idx, size, 128,
  93                                        socket_id);
  94         if (!dma) {
  95                 PMD_DRV_LOG(ERR, "ring_dma_zone_reserve for rx_ring failed\n");
  96                 axgbe_rx_queue_release(rxq);
  97                 return -ENOMEM;
  98         }
  99         rxq->ring_phys_addr = (uint64_t)dma->iova;
 100         rxq->desc = (volatile union axgbe_rx_desc *)dma->addr;
 101         memset((void *)rxq->desc, 0, size);
 102         /* Allocate software ring */
 103         size = rxq->nb_desc * sizeof(struct rte_mbuf *);
 104         rxq->sw_ring = rte_zmalloc_socket("sw_ring", size,
 105                                           RTE_CACHE_LINE_SIZE,
 106                                           socket_id);
 107         if (!rxq->sw_ring) {
 108                 PMD_DRV_LOG(ERR, "rte_zmalloc for sw_ring failed\n");
 109                 axgbe_rx_queue_release(rxq);
 110                 return -ENOMEM;
 111         }
 112         dev->data->rx_queues[queue_idx] = rxq;
 113         if (!pdata->rx_queues)
 114                 pdata->rx_queues = dev->data->rx_queues;
 115
 116         return 0;
 117 }
 118
 119 static void axgbe_prepare_rx_stop(struct axgbe_port *pdata,
 120                                   unsigned int queue)
 121 {
 122         unsigned int rx_status;
 123         unsigned long rx_timeout;
 124
 125         /* The Rx engine cannot be stopped if it is actively processing
 126          * packets. Wait for the Rx queue to empty the Rx fifo.  Don't
 127          * wait forever though...
 128          */
 129         rx_timeout = rte_get_timer_cycles() + (AXGBE_DMA_STOP_TIMEOUT *
 130                                                rte_get_timer_hz());
 131
 132         while (time_before(rte_get_timer_cycles(), rx_timeout)) {
 133                 rx_status = AXGMAC_MTL_IOREAD(pdata, queue, MTL_Q_RQDR);
 134                 if ((AXGMAC_GET_BITS(rx_status, MTL_Q_RQDR, PRXQ) == 0) &&
 135                     (AXGMAC_GET_BITS(rx_status, MTL_Q_RQDR, RXQSTS) == 0))
 136                         break;
 137
 138                 rte_delay_us(900);
 139         }
 140
 141         if (!time_before(rte_get_timer_cycles(), rx_timeout))
 142                 PMD_DRV_LOG(ERR,
 143                             "timed out waiting for Rx queue %u to empty\n",
 144                             queue);
 145 }
 146
 147 void axgbe_dev_disable_rx(struct rte_eth_dev *dev)
 148 {
 149         struct axgbe_rx_queue *rxq;
 150         struct axgbe_port *pdata = dev->data->dev_private;
 151         unsigned int i;
 152
 153         /* Disable MAC Rx */
 154         AXGMAC_IOWRITE_BITS(pdata, MAC_RCR, DCRCC, 0);
 155         AXGMAC_IOWRITE_BITS(pdata, MAC_RCR, CST, 0);
 156         AXGMAC_IOWRITE_BITS(pdata, MAC_RCR, ACS, 0);
 157         AXGMAC_IOWRITE_BITS(pdata, MAC_RCR, RE, 0);
 158
 159         /* Prepare for Rx DMA channel stop */
 160         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 161                 rxq = dev->data->rx_queues[i];
 162                 axgbe_prepare_rx_stop(pdata, i);
 163         }
 164         /* Disable each Rx queue */
 165         AXGMAC_IOWRITE(pdata, MAC_RQC0R, 0);
 166         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 167                 rxq = dev->data->rx_queues[i];
 168                 /* Disable Rx DMA channel */
 169                 AXGMAC_DMA_IOWRITE_BITS(rxq, DMA_CH_RCR, SR, 0);
 170         }
 171 }
 172
 173 void axgbe_dev_enable_rx(struct rte_eth_dev *dev)
 174 {
 175         struct axgbe_rx_queue *rxq;
 176         struct axgbe_port *pdata = dev->data->dev_private;
 177         unsigned int i;
 178         unsigned int reg_val = 0;
 179
 180         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 181                 rxq = dev->data->rx_queues[i];
 182                 /* Enable Rx DMA channel */
 183                 AXGMAC_DMA_IOWRITE_BITS(rxq, DMA_CH_RCR, SR, 1);
 184         }
 185
 186         reg_val = 0;
 187         for (i = 0; i < pdata->rx_q_count; i++)
 188                 reg_val |= (0x02 << (i << 1));
 189         AXGMAC_IOWRITE(pdata, MAC_RQC0R, reg_val);
 190
 191         /* Enable MAC Rx */
 192         AXGMAC_IOWRITE_BITS(pdata, MAC_RCR, DCRCC, 1);
 193         /* Frame is forwarded after stripping CRC to application*/
 194         if (pdata->crc_strip_enable) {
 195                 AXGMAC_IOWRITE_BITS(pdata, MAC_RCR, CST, 1);
 196                 AXGMAC_IOWRITE_BITS(pdata, MAC_RCR, ACS, 1);
 197         }
 198         AXGMAC_IOWRITE_BITS(pdata, MAC_RCR, RE, 1);
 199 }
 200
 201 /* Rx function one to one refresh */
 202 uint16_t
 203 axgbe_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts,
 204                 uint16_t nb_pkts)
 205 {
 206         PMD_INIT_FUNC_TRACE();
 207         uint16_t nb_rx = 0;
 208         struct axgbe_rx_queue *rxq = rx_queue;
 209         volatile union axgbe_rx_desc *desc;
 210         uint64_t old_dirty = rxq->dirty;
 211         struct rte_mbuf *mbuf, *tmbuf;
 212         unsigned int err, etlt;
 213         uint32_t error_status;
 214         uint16_t idx, pidx, pkt_len;
 215         uint64_t offloads;
 216
 217         idx = AXGBE_GET_DESC_IDX(rxq, rxq->cur);
 218         while (nb_rx < nb_pkts) {
 219                 if (unlikely(idx == rxq->nb_desc))
 220                         idx = 0;
 221
 222                 desc = &rxq->desc[idx];
 223
 224                 if (AXGMAC_GET_BITS_LE(desc->write.desc3, RX_NORMAL_DESC3, OWN))
 225                         break;
 226                 tmbuf = rte_mbuf_raw_alloc(rxq->mb_pool);
 227                 if (unlikely(!tmbuf)) {
 228                         PMD_DRV_LOG(ERR, "RX mbuf alloc failed port_id = %u"
 229                                     " queue_id = %u\n",
 230                                     (unsigned int)rxq->port_id,
 231                                     (unsigned int)rxq->queue_id);
 232                         rte_eth_devices[
 233                                 rxq->port_id].data->rx_mbuf_alloc_failed++;
 234                         rxq->rx_mbuf_alloc_failed++;
 235                         break;
 236                 }
 237                 pidx = idx + 1;
 238                 if (unlikely(pidx == rxq->nb_desc))
 239                         pidx = 0;
 240
 241                 rte_prefetch0(rxq->sw_ring[pidx]);
 242                 if ((pidx & 0x3) == 0) {
 243                         rte_prefetch0(&rxq->desc[pidx]);
 244                         rte_prefetch0(&rxq->sw_ring[pidx]);
 245                 }
 246
 247                 mbuf = rxq->sw_ring[idx];
 248                 /* Check for any errors and free mbuf*/
 249                 err = AXGMAC_GET_BITS_LE(desc->write.desc3,
 250                                          RX_NORMAL_DESC3, ES);
 251                 error_status = 0;
 252                 if (unlikely(err)) {
 253                         error_status = desc->write.desc3 & AXGBE_ERR_STATUS;
 254                         if ((error_status != AXGBE_L3_CSUM_ERR) &&
 255                             (error_status != AXGBE_L4_CSUM_ERR)) {
 256                                 rxq->errors++;
 257                                 rte_pktmbuf_free(mbuf);
 258                                 goto err_set;
 259                         }
 260                 }
 261                 if (rxq->pdata->rx_csum_enable) {
 262                         mbuf->ol_flags = 0;
 263                         mbuf->ol_flags |= RTE_MBUF_F_RX_IP_CKSUM_GOOD;
 264                         mbuf->ol_flags |= RTE_MBUF_F_RX_L4_CKSUM_GOOD;
 265                         if (unlikely(error_status == AXGBE_L3_CSUM_ERR)) {
 266                                 mbuf->ol_flags &= ~RTE_MBUF_F_RX_IP_CKSUM_GOOD;
 267                                 mbuf->ol_flags |= RTE_MBUF_F_RX_IP_CKSUM_BAD;
 268                                 mbuf->ol_flags &= ~RTE_MBUF_F_RX_L4_CKSUM_GOOD;
 269                                 mbuf->ol_flags |= RTE_MBUF_F_RX_L4_CKSUM_UNKNOWN;
 270                         } else if (
 271                                 unlikely(error_status == AXGBE_L4_CSUM_ERR)) {
 272                                 mbuf->ol_flags &= ~RTE_MBUF_F_RX_L4_CKSUM_GOOD;
 273                                 mbuf->ol_flags |= RTE_MBUF_F_RX_L4_CKSUM_BAD;
 274                         }
 275                 }
 276                 rte_prefetch1(rte_pktmbuf_mtod(mbuf, void *));
 277                 /* Get the RSS hash */
 278                 if (AXGMAC_GET_BITS_LE(desc->write.desc3, RX_NORMAL_DESC3, RSV))
 279                         mbuf->hash.rss = rte_le_to_cpu_32(desc->write.desc1);
 280                 etlt = AXGMAC_GET_BITS_LE(desc->write.desc3,
 281                                 RX_NORMAL_DESC3, ETLT);
 282                 offloads = rxq->pdata->eth_dev->data->dev_conf.rxmode.offloads;
 283                 if (!err || !etlt) {
 284                         if (etlt == RX_CVLAN_TAG_PRESENT) {
 285                                 mbuf->ol_flags |= RTE_MBUF_F_RX_VLAN;
 286                                 mbuf->vlan_tci =
 287                                         AXGMAC_GET_BITS_LE(desc->write.desc0,
 288                                                         RX_NORMAL_DESC0, OVT);
 289                                 if (offloads & DEV_RX_OFFLOAD_VLAN_STRIP)
 290                                         mbuf->ol_flags |= RTE_MBUF_F_RX_VLAN_STRIPPED;
 291                                 else
 292                                         mbuf->ol_flags &= ~RTE_MBUF_F_RX_VLAN_STRIPPED;
 293                                 } else {
 294                                         mbuf->ol_flags &=
 295                                                 ~(RTE_MBUF_F_RX_VLAN
 296                                                         | RTE_MBUF_F_RX_VLAN_STRIPPED);
 297                                         mbuf->vlan_tci = 0;
 298                                 }
 299                 }
 300                 /* Indicate if a Context Descriptor is next */
 301                 if (AXGMAC_GET_BITS_LE(desc->write.desc3, RX_NORMAL_DESC3, CDA))
 302                         mbuf->ol_flags |= RTE_MBUF_F_RX_IEEE1588_PTP
 303                                         | RTE_MBUF_F_RX_IEEE1588_TMST;
 304                 pkt_len = AXGMAC_GET_BITS_LE(desc->write.desc3, RX_NORMAL_DESC3,
 305                                              PL) - rxq->crc_len;
 306                 /* Mbuf populate */
 307                 mbuf->next = NULL;
 308                 mbuf->data_off = RTE_PKTMBUF_HEADROOM;
 309                 mbuf->nb_segs = 1;
 310                 mbuf->port = rxq->port_id;
 311                 mbuf->pkt_len = pkt_len;
 312                 mbuf->data_len = pkt_len;
 313                 rxq->bytes += pkt_len;
 314                 rx_pkts[nb_rx++] = mbuf;
 315 err_set:
 316                 rxq->cur++;
 317                 rxq->sw_ring[idx++] = tmbuf;
 318                 desc->read.baddr =
 319                         rte_cpu_to_le_64(rte_mbuf_data_iova_default(tmbuf));
 320                 memset((void *)(&desc->read.desc2), 0, 8);
 321                 AXGMAC_SET_BITS_LE(desc->read.desc3, RX_NORMAL_DESC3, OWN, 1);
 322                 rxq->dirty++;
 323         }
 324         rxq->pkts += nb_rx;
 325         if (rxq->dirty != old_dirty) {
 326                 rte_wmb();
 327                 idx = AXGBE_GET_DESC_IDX(rxq, rxq->dirty - 1);
 328                 AXGMAC_DMA_IOWRITE(rxq, DMA_CH_RDTR_LO,
 329                                    low32_value(rxq->ring_phys_addr +
 330                                    (idx * sizeof(union axgbe_rx_desc))));
 331         }
 332
 333         return nb_rx;
 334 }
 335
 336
 337 uint16_t eth_axgbe_recv_scattered_pkts(void *rx_queue,
 338                 struct rte_mbuf **rx_pkts, uint16_t nb_pkts)
 339 {
 340         PMD_INIT_FUNC_TRACE();
 341         uint16_t nb_rx = 0;
 342         struct axgbe_rx_queue *rxq = rx_queue;
 343         volatile union axgbe_rx_desc *desc;
 344
 345         uint64_t old_dirty = rxq->dirty;
 346         struct rte_mbuf *first_seg = NULL;
 347         struct rte_mbuf *mbuf, *tmbuf;
 348         unsigned int err, etlt;
 349         uint32_t error_status;
 350         uint16_t idx, pidx, data_len = 0, pkt_len = 0;
 351         uint64_t offloads;
 352
 353         idx = AXGBE_GET_DESC_IDX(rxq, rxq->cur);
 354         while (nb_rx < nb_pkts) {
 355                 bool eop = 0;
 356 next_desc:
 357                 if (unlikely(idx == rxq->nb_desc))
 358                         idx = 0;
 359
 360                 desc = &rxq->desc[idx];
 361
 362                 if (AXGMAC_GET_BITS_LE(desc->write.desc3, RX_NORMAL_DESC3, OWN))
 363                         break;
 364
 365                 tmbuf = rte_mbuf_raw_alloc(rxq->mb_pool);
 366                 if (unlikely(!tmbuf)) {
 367                         PMD_DRV_LOG(ERR, "RX mbuf alloc failed port_id = %u"
 368                                     " queue_id = %u\n",
 369                                     (unsigned int)rxq->port_id,
 370                                     (unsigned int)rxq->queue_id);
 371                         rte_eth_devices[rxq->port_id].data->rx_mbuf_alloc_failed++;
 372                         break;
 373                 }
 374
 375                 pidx = idx + 1;
 376                 if (unlikely(pidx == rxq->nb_desc))
 377                         pidx = 0;
 378
 379                 rte_prefetch0(rxq->sw_ring[pidx]);
 380                 if ((pidx & 0x3) == 0) {
 381                         rte_prefetch0(&rxq->desc[pidx]);
 382                         rte_prefetch0(&rxq->sw_ring[pidx]);
 383                 }
 384
 385                 mbuf = rxq->sw_ring[idx];
 386                 /* Check for any errors and free mbuf*/
 387                 err = AXGMAC_GET_BITS_LE(desc->write.desc3,
 388                                          RX_NORMAL_DESC3, ES);
 389                 error_status = 0;
 390                 if (unlikely(err)) {
 391                         error_status = desc->write.desc3 & AXGBE_ERR_STATUS;
 392                         if ((error_status != AXGBE_L3_CSUM_ERR)
 393                                         && (error_status != AXGBE_L4_CSUM_ERR)) {
 394                                 rxq->errors++;
 395                                 rte_pktmbuf_free(mbuf);
 396                                 goto err_set;
 397                         }
 398                 }
 399                 rte_prefetch1(rte_pktmbuf_mtod(mbuf, void *));
 400
 401                 if (!AXGMAC_GET_BITS_LE(desc->write.desc3,
 402                                         RX_NORMAL_DESC3, LD)) {
 403                         eop = 0;
 404                         pkt_len = rxq->buf_size;
 405                         data_len = pkt_len;
 406                 } else {
 407                         eop = 1;
 408                         pkt_len = AXGMAC_GET_BITS_LE(desc->write.desc3,
 409                                         RX_NORMAL_DESC3, PL);
 410                         data_len = pkt_len - rxq->crc_len;
 411                 }
 412
 413                 if (first_seg != NULL) {
 414                         if (rte_pktmbuf_chain(first_seg, mbuf) != 0)
 415                                 rte_mempool_put(rxq->mb_pool,
 416                                                 first_seg);
 417                 } else {
 418                         first_seg = mbuf;
 419                 }
 420
 421                 /* Get the RSS hash */
 422                 if (AXGMAC_GET_BITS_LE(desc->write.desc3, RX_NORMAL_DESC3, RSV))
 423                         mbuf->hash.rss = rte_le_to_cpu_32(desc->write.desc1);
 424                 etlt = AXGMAC_GET_BITS_LE(desc->write.desc3,
 425                                 RX_NORMAL_DESC3, ETLT);
 426                 offloads = rxq->pdata->eth_dev->data->dev_conf.rxmode.offloads;
 427                 if (!err || !etlt) {
 428                         if (etlt == RX_CVLAN_TAG_PRESENT) {
 429                                 mbuf->ol_flags |= RTE_MBUF_F_RX_VLAN;
 430                                 mbuf->vlan_tci =
 431                                         AXGMAC_GET_BITS_LE(desc->write.desc0,
 432                                                         RX_NORMAL_DESC0, OVT);
 433                                 if (offloads & DEV_RX_OFFLOAD_VLAN_STRIP)
 434                                         mbuf->ol_flags |= RTE_MBUF_F_RX_VLAN_STRIPPED;
 435                                 else
 436                                         mbuf->ol_flags &= ~RTE_MBUF_F_RX_VLAN_STRIPPED;
 437                         } else {
 438                                 mbuf->ol_flags &=
 439                                         ~(RTE_MBUF_F_RX_VLAN | RTE_MBUF_F_RX_VLAN_STRIPPED);
 440                                 mbuf->vlan_tci = 0;
 441                         }
 442                 }
 443                 /* Mbuf populate */
 444                 mbuf->data_off = RTE_PKTMBUF_HEADROOM;
 445                 mbuf->data_len = data_len;
 446
 447 err_set:
 448                 rxq->cur++;
 449                 rxq->sw_ring[idx++] = tmbuf;
 450                 desc->read.baddr =
 451                         rte_cpu_to_le_64(rte_mbuf_data_iova_default(tmbuf));
 452                 memset((void *)(&desc->read.desc2), 0, 8);
 453                 AXGMAC_SET_BITS_LE(desc->read.desc3, RX_NORMAL_DESC3, OWN, 1);
 454                 rxq->dirty++;
 455
 456                 if (!eop) {
 457                         rte_pktmbuf_free(mbuf);
 458                         goto next_desc;
 459                 }
 460
 461                 first_seg->pkt_len = pkt_len;
 462                 rxq->bytes += pkt_len;
 463                 mbuf->next = NULL;
 464
 465                 first_seg->port = rxq->port_id;
 466                 if (rxq->pdata->rx_csum_enable) {
 467                         mbuf->ol_flags = 0;
 468                         mbuf->ol_flags |= RTE_MBUF_F_RX_IP_CKSUM_GOOD;
 469                         mbuf->ol_flags |= RTE_MBUF_F_RX_L4_CKSUM_GOOD;
 470                         if (unlikely(error_status == AXGBE_L3_CSUM_ERR)) {
 471                                 mbuf->ol_flags &= ~RTE_MBUF_F_RX_IP_CKSUM_GOOD;
 472                                 mbuf->ol_flags |= RTE_MBUF_F_RX_IP_CKSUM_BAD;
 473                                 mbuf->ol_flags &= ~RTE_MBUF_F_RX_L4_CKSUM_GOOD;
 474                                 mbuf->ol_flags |= RTE_MBUF_F_RX_L4_CKSUM_UNKNOWN;
 475                         } else if (unlikely(error_status
 476                                                 == AXGBE_L4_CSUM_ERR)) {
 477                                 mbuf->ol_flags &= ~RTE_MBUF_F_RX_L4_CKSUM_GOOD;
 478                                 mbuf->ol_flags |= RTE_MBUF_F_RX_L4_CKSUM_BAD;
 479                         }
 480                 }
 481
 482                 rx_pkts[nb_rx++] = first_seg;
 483
 484                  /* Setup receipt context for a new packet.*/
 485                 first_seg = NULL;
 486         }
 487
 488         /* Save receive context.*/
 489         rxq->pkts += nb_rx;
 490
 491         if (rxq->dirty != old_dirty) {
 492                 rte_wmb();
 493                 idx = AXGBE_GET_DESC_IDX(rxq, rxq->dirty - 1);
 494                 AXGMAC_DMA_IOWRITE(rxq, DMA_CH_RDTR_LO,
 495                                    low32_value(rxq->ring_phys_addr +
 496                                    (idx * sizeof(union axgbe_rx_desc))));
 497         }
 498         return nb_rx;
 499 }
 500
 501 /* Tx Apis */
 502 static void axgbe_tx_queue_release(struct axgbe_tx_queue *tx_queue)
 503 {
 504         uint16_t i;
 505         struct rte_mbuf **sw_ring;
 506
 507         if (tx_queue) {
 508                 sw_ring = tx_queue->sw_ring;
 509                 if (sw_ring) {
 510                         for (i = 0; i < tx_queue->nb_desc; i++) {
 511                                 if (sw_ring[i])
 512                                         rte_pktmbuf_free(sw_ring[i]);
 513                         }
 514                         rte_free(sw_ring);
 515                 }
 516                 rte_free(tx_queue);
 517         }
 518 }
 519
 520 void axgbe_dev_tx_queue_release(void *txq)
 521 {
 522         axgbe_tx_queue_release(txq);
 523 }
 524
 525 int axgbe_dev_tx_queue_setup(struct rte_eth_dev *dev, uint16_t queue_idx,
 526                              uint16_t nb_desc, unsigned int socket_id,
 527                              const struct rte_eth_txconf *tx_conf)
 528 {
 529         PMD_INIT_FUNC_TRACE();
 530         uint32_t tx_desc;
 531         struct axgbe_port *pdata;
 532         struct axgbe_tx_queue *txq;
 533         unsigned int tsize;
 534         const struct rte_memzone *tz;
 535         uint64_t offloads;
 536
 537         tx_desc = nb_desc;
 538         pdata = dev->data->dev_private;
 539
 540         /*
 541          * validate tx descriptors count
 542          * should be power of 2 and less than h/w supported
 543          */
 544         if ((!rte_is_power_of_2(tx_desc)) ||
 545             tx_desc > pdata->tx_desc_count ||
 546             tx_desc < AXGBE_MIN_RING_DESC)
 547                 return -EINVAL;
 548
 549         /* First allocate the tx queue data structure */
 550         txq = rte_zmalloc("ethdev TX queue", sizeof(struct axgbe_tx_queue),
 551                           RTE_CACHE_LINE_SIZE);
 552         if (!txq)
 553                 return -ENOMEM;
 554         txq->pdata = pdata;
 555         offloads = tx_conf->offloads |
 556                 txq->pdata->eth_dev->data->dev_conf.txmode.offloads;
 557         txq->nb_desc = tx_desc;
 558         txq->free_thresh = tx_conf->tx_free_thresh ?
 559                 tx_conf->tx_free_thresh : AXGBE_TX_FREE_THRESH;
 560         if (txq->free_thresh > txq->nb_desc)
 561                 txq->free_thresh = (txq->nb_desc >> 1);
 562         txq->free_batch_cnt = txq->free_thresh;
 563
 564         /* In vector_tx path threshold should be multiple of queue_size*/
 565         if (txq->nb_desc % txq->free_thresh != 0)
 566                 txq->vector_disable = 1;
 567
 568         if (offloads != 0)
 569                 txq->vector_disable = 1;
 570
 571         /* Allocate TX ring hardware descriptors */
 572         tsize = txq->nb_desc * sizeof(struct axgbe_tx_desc);
 573         tz = rte_eth_dma_zone_reserve(dev, "tx_ring", queue_idx,
 574                                       tsize, AXGBE_DESC_ALIGN, socket_id);
 575         if (!tz) {
 576                 axgbe_tx_queue_release(txq);
 577                 return -ENOMEM;
 578         }
 579         memset(tz->addr, 0, tsize);
 580         txq->ring_phys_addr = (uint64_t)tz->iova;
 581         txq->desc = tz->addr;
 582         txq->queue_id = queue_idx;
 583         txq->port_id = dev->data->port_id;
 584         txq->dma_regs = (void *)((uint8_t *)pdata->xgmac_regs + DMA_CH_BASE +
 585                 (DMA_CH_INC * txq->queue_id));
 586         txq->dma_tail_reg = (volatile uint32_t *)((uint8_t *)txq->dma_regs +
 587                                                   DMA_CH_TDTR_LO);
 588         txq->cur = 0;
 589         txq->dirty = 0;
 590         txq->nb_desc_free = txq->nb_desc;
 591         /* Allocate software ring */
 592         tsize = txq->nb_desc * sizeof(struct rte_mbuf *);
 593         txq->sw_ring = rte_zmalloc("tx_sw_ring", tsize,
 594                                    RTE_CACHE_LINE_SIZE);
 595         if (!txq->sw_ring) {
 596                 axgbe_tx_queue_release(txq);
 597                 return -ENOMEM;
 598         }
 599         dev->data->tx_queues[queue_idx] = txq;
 600         if (!pdata->tx_queues)
 601                 pdata->tx_queues = dev->data->tx_queues;
 602
 603         if (txq->vector_disable ||
 604                         rte_vect_get_max_simd_bitwidth() < RTE_VECT_SIMD_128)
 605                 dev->tx_pkt_burst = &axgbe_xmit_pkts;
 606         else
 607 #ifdef RTE_ARCH_X86
 608                 dev->tx_pkt_burst = &axgbe_xmit_pkts_vec;
 609 #else
 610                 dev->tx_pkt_burst = &axgbe_xmit_pkts;
 611 #endif
 612
 613         return 0;
 614 }
 615
 616 int axgbe_dev_fw_version_get(struct rte_eth_dev *eth_dev,
 617                 char *fw_version, size_t fw_size)
 618 {
 619         struct axgbe_port *pdata;
 620         struct axgbe_hw_features *hw_feat;
 621         int ret;
 622
 623         pdata = (struct axgbe_port *)eth_dev->data->dev_private;
 624         hw_feat = &pdata->hw_feat;
 625
 626         ret = snprintf(fw_version, fw_size, "%d.%d.%d",
 627                         AXGMAC_GET_BITS(hw_feat->version, MAC_VR, USERVER),
 628                         AXGMAC_GET_BITS(hw_feat->version, MAC_VR, DEVID),
 629                         AXGMAC_GET_BITS(hw_feat->version, MAC_VR, SNPSVER));
 630         if (ret < 0)
 631                 return -EINVAL;
 632
 633         ret += 1; /* add the size of '\0' */
 634         if (fw_size < (size_t)ret)
 635                 return ret;
 636         else
 637                 return 0;
 638 }
 639
 640 static void axgbe_txq_prepare_tx_stop(struct axgbe_port *pdata,
 641                                       unsigned int queue)
 642 {
 643         unsigned int tx_status;
 644         unsigned long tx_timeout;
 645
 646         /* The Tx engine cannot be stopped if it is actively processing
 647          * packets. Wait for the Tx queue to empty the Tx fifo.  Don't
 648          * wait forever though...
 649          */
 650         tx_timeout = rte_get_timer_cycles() + (AXGBE_DMA_STOP_TIMEOUT *
 651                                                rte_get_timer_hz());
 652         while (time_before(rte_get_timer_cycles(), tx_timeout)) {
 653                 tx_status = AXGMAC_MTL_IOREAD(pdata, queue, MTL_Q_TQDR);
 654                 if ((AXGMAC_GET_BITS(tx_status, MTL_Q_TQDR, TRCSTS) != 1) &&
 655                     (AXGMAC_GET_BITS(tx_status, MTL_Q_TQDR, TXQSTS) == 0))
 656                         break;
 657
 658                 rte_delay_us(900);
 659         }
 660
 661         if (!time_before(rte_get_timer_cycles(), tx_timeout))
 662                 PMD_DRV_LOG(ERR,
 663                             "timed out waiting for Tx queue %u to empty\n",
 664                             queue);
 665 }
 666
 667 static void axgbe_prepare_tx_stop(struct axgbe_port *pdata,
 668                                   unsigned int queue)
 669 {
 670         unsigned int tx_dsr, tx_pos, tx_qidx;
 671         unsigned int tx_status;
 672         unsigned long tx_timeout;
 673
 674         if (AXGMAC_GET_BITS(pdata->hw_feat.version, MAC_VR, SNPSVER) > 0x20)
 675                 return axgbe_txq_prepare_tx_stop(pdata, queue);
 676
 677         /* Calculate the status register to read and the position within */
 678         if (queue < DMA_DSRX_FIRST_QUEUE) {
 679                 tx_dsr = DMA_DSR0;
 680                 tx_pos = (queue * DMA_DSR_Q_WIDTH) + DMA_DSR0_TPS_START;
 681         } else {
 682                 tx_qidx = queue - DMA_DSRX_FIRST_QUEUE;
 683
 684                 tx_dsr = DMA_DSR1 + ((tx_qidx / DMA_DSRX_QPR) * DMA_DSRX_INC);
 685                 tx_pos = ((tx_qidx % DMA_DSRX_QPR) * DMA_DSR_Q_WIDTH) +
 686                         DMA_DSRX_TPS_START;
 687         }
 688
 689         /* The Tx engine cannot be stopped if it is actively processing
 690          * descriptors. Wait for the Tx engine to enter the stopped or
 691          * suspended state.  Don't wait forever though...
 692          */
 693         tx_timeout = rte_get_timer_cycles() + (AXGBE_DMA_STOP_TIMEOUT *
 694                                                rte_get_timer_hz());
 695         while (time_before(rte_get_timer_cycles(), tx_timeout)) {
 696                 tx_status = AXGMAC_IOREAD(pdata, tx_dsr);
 697                 tx_status = GET_BITS(tx_status, tx_pos, DMA_DSR_TPS_WIDTH);
 698                 if ((tx_status == DMA_TPS_STOPPED) ||
 699                     (tx_status == DMA_TPS_SUSPENDED))
 700                         break;
 701
 702                 rte_delay_us(900);
 703         }
 704
 705         if (!time_before(rte_get_timer_cycles(), tx_timeout))
 706                 PMD_DRV_LOG(ERR,
 707                             "timed out waiting for Tx DMA channel %u to stop\n",
 708                             queue);
 709 }
 710
 711 void axgbe_dev_disable_tx(struct rte_eth_dev *dev)
 712 {
 713         struct axgbe_tx_queue *txq;
 714         struct axgbe_port *pdata = dev->data->dev_private;
 715         unsigned int i;
 716
 717         /* Prepare for stopping DMA channel */
 718         for (i = 0; i < pdata->tx_q_count; i++) {
 719                 txq = dev->data->tx_queues[i];
 720                 axgbe_prepare_tx_stop(pdata, i);
 721         }
 722         /* Disable MAC Tx */
 723         AXGMAC_IOWRITE_BITS(pdata, MAC_TCR, TE, 0);
 724         /* Disable each Tx queue*/
 725         for (i = 0; i < pdata->tx_q_count; i++)
 726                 AXGMAC_MTL_IOWRITE_BITS(pdata, i, MTL_Q_TQOMR, TXQEN,
 727                                         0);
 728         /* Disable each  Tx DMA channel */
 729         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 730                 txq = dev->data->tx_queues[i];
 731                 AXGMAC_DMA_IOWRITE_BITS(txq, DMA_CH_TCR, ST, 0);
 732         }
 733 }
 734
 735 void axgbe_dev_enable_tx(struct rte_eth_dev *dev)
 736 {
 737         struct axgbe_tx_queue *txq;
 738         struct axgbe_port *pdata = dev->data->dev_private;
 739         unsigned int i;
 740
 741         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 742                 txq = dev->data->tx_queues[i];
 743                 /* Enable Tx DMA channel */
 744                 AXGMAC_DMA_IOWRITE_BITS(txq, DMA_CH_TCR, ST, 1);
 745         }
 746         /* Enable Tx queue*/
 747         for (i = 0; i < pdata->tx_q_count; i++)
 748                 AXGMAC_MTL_IOWRITE_BITS(pdata, i, MTL_Q_TQOMR, TXQEN,
 749                                         MTL_Q_ENABLED);
 750         /* Enable MAC Tx */
 751         AXGMAC_IOWRITE_BITS(pdata, MAC_TCR, TE, 1);
 752 }
 753
 754 /* Free Tx conformed mbufs */
 755 static void axgbe_xmit_cleanup(struct axgbe_tx_queue *txq)
 756 {
 757         volatile struct axgbe_tx_desc *desc;
 758         uint16_t idx;
 759
 760         idx = AXGBE_GET_DESC_IDX(txq, txq->dirty);
 761         while (txq->cur != txq->dirty) {
 762                 if (unlikely(idx == txq->nb_desc))
 763                         idx = 0;
 764                 desc = &txq->desc[idx];
 765                 /* Check for ownership */
 766                 if (AXGMAC_GET_BITS_LE(desc->desc3, TX_NORMAL_DESC3, OWN))
 767                         return;
 768                 memset((void *)&desc->desc2, 0, 8);
 769                 /* Free mbuf */
 770                 rte_pktmbuf_free(txq->sw_ring[idx]);
 771                 txq->sw_ring[idx++] = NULL;
 772                 txq->dirty++;
 773         }
 774 }
 775
 776 /* Tx Descriptor formation
 777  * Considering each mbuf requires one desc
 778  * mbuf is linear
 779  */
 780 static int axgbe_xmit_hw(struct axgbe_tx_queue *txq,
 781                          struct rte_mbuf *mbuf)
 782 {
 783         volatile struct axgbe_tx_desc *desc;
 784         uint16_t idx;
 785         uint64_t mask;
 786
 787         idx = AXGBE_GET_DESC_IDX(txq, txq->cur);
 788         desc = &txq->desc[idx];
 789
 790         /* Update buffer address  and length */
 791         desc->baddr = rte_mbuf_data_iova(mbuf);
 792         AXGMAC_SET_BITS_LE(desc->desc2, TX_NORMAL_DESC2, HL_B1L,
 793                            mbuf->pkt_len);
 794         /* Total msg length to transmit */
 795         AXGMAC_SET_BITS_LE(desc->desc3, TX_NORMAL_DESC3, FL,
 796                            mbuf->pkt_len);
 797         /* Timestamp enablement check */
 798         if (mbuf->ol_flags & RTE_MBUF_F_TX_IEEE1588_TMST)
 799                 AXGMAC_SET_BITS_LE(desc->desc2, TX_NORMAL_DESC2, TTSE, 1);
 800         rte_wmb();
 801         /* Mark it as First and Last Descriptor */
 802         AXGMAC_SET_BITS_LE(desc->desc3, TX_NORMAL_DESC3, FD, 1);
 803         AXGMAC_SET_BITS_LE(desc->desc3, TX_NORMAL_DESC3, LD, 1);
 804         /* Mark it as a NORMAL descriptor */
 805         AXGMAC_SET_BITS_LE(desc->desc3, TX_NORMAL_DESC3, CTXT, 0);
 806         /* configure h/w Offload */
 807         mask = mbuf->ol_flags & RTE_MBUF_F_TX_L4_MASK;
 808         if ((mask == RTE_MBUF_F_TX_TCP_CKSUM) || (mask == RTE_MBUF_F_TX_UDP_CKSUM))
 809                 AXGMAC_SET_BITS_LE(desc->desc3, TX_NORMAL_DESC3, CIC, 0x3);
 810         else if (mbuf->ol_flags & RTE_MBUF_F_TX_IP_CKSUM)
 811                 AXGMAC_SET_BITS_LE(desc->desc3, TX_NORMAL_DESC3, CIC, 0x1);
 812         rte_wmb();
 813
 814         if (mbuf->ol_flags & (RTE_MBUF_F_TX_VLAN_PKT | RTE_MBUF_F_TX_QINQ_PKT)) {
 815                 /* Mark it as a CONTEXT descriptor */
 816                 AXGMAC_SET_BITS_LE(desc->desc3, TX_CONTEXT_DESC3,
 817                                   CTXT, 1);
 818                 /* Set the VLAN tag */
 819                 AXGMAC_SET_BITS_LE(desc->desc3, TX_CONTEXT_DESC3,
 820                                   VT, mbuf->vlan_tci);
 821                 /* Indicate this descriptor contains the VLAN tag */
 822                 AXGMAC_SET_BITS_LE(desc->desc3, TX_CONTEXT_DESC3,
 823                                           VLTV, 1);
 824                 AXGMAC_SET_BITS_LE(desc->desc2, TX_NORMAL_DESC2, VTIR,
 825                                 TX_NORMAL_DESC2_VLAN_INSERT);
 826         } else {
 827                 AXGMAC_SET_BITS_LE(desc->desc2, TX_NORMAL_DESC2, VTIR, 0x0);
 828         }
 829         rte_wmb();
 830
 831         /* Set OWN bit */
 832         AXGMAC_SET_BITS_LE(desc->desc3, TX_NORMAL_DESC3, OWN, 1);
 833         rte_wmb();
 834
 835
 836         /* Save mbuf */
 837         txq->sw_ring[idx] = mbuf;
 838         /* Update current index*/
 839         txq->cur++;
 840         /* Update stats */
 841         txq->bytes += mbuf->pkt_len;
 842
 843         return 0;
 844 }
 845
 846 /* Eal supported tx wrapper*/
 847 uint16_t
 848 axgbe_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts,
 849                 uint16_t nb_pkts)
 850 {
 851         PMD_INIT_FUNC_TRACE();
 852
 853         if (unlikely(nb_pkts == 0))
 854                 return nb_pkts;
 855
 856         struct axgbe_tx_queue *txq;
 857         uint16_t nb_desc_free;
 858         uint16_t nb_pkt_sent = 0;
 859         uint16_t idx;
 860         uint32_t tail_addr;
 861         struct rte_mbuf *mbuf;
 862
 863         txq  = (struct axgbe_tx_queue *)tx_queue;
 864         nb_desc_free = txq->nb_desc - (txq->cur - txq->dirty);
 865
 866         if (unlikely(nb_desc_free <= txq->free_thresh)) {
 867                 axgbe_xmit_cleanup(txq);
 868                 nb_desc_free = txq->nb_desc - (txq->cur - txq->dirty);
 869                 if (unlikely(nb_desc_free == 0))
 870                         return 0;
 871         }
 872         nb_pkts = RTE_MIN(nb_desc_free, nb_pkts);
 873         while (nb_pkts--) {
 874                 mbuf = *tx_pkts++;
 875                 if (axgbe_xmit_hw(txq, mbuf))
 876                         goto out;
 877                 nb_pkt_sent++;
 878         }
 879 out:
 880         /* Sync read and write */
 881         rte_mb();
 882         idx = AXGBE_GET_DESC_IDX(txq, txq->cur);
 883         tail_addr = low32_value(txq->ring_phys_addr +
 884                                 idx * sizeof(struct axgbe_tx_desc));
 885         /* Update tail reg with next immediate address to kick Tx DMA channel*/
 886         AXGMAC_DMA_IOWRITE(txq, DMA_CH_TDTR_LO, tail_addr);
 887         txq->pkts += nb_pkt_sent;
 888         return nb_pkt_sent;
 889 }
 890
 891 void axgbe_dev_clear_queues(struct rte_eth_dev *dev)
 892 {
 893         PMD_INIT_FUNC_TRACE();
 894         uint8_t i;
 895         struct axgbe_rx_queue *rxq;
 896         struct axgbe_tx_queue *txq;
 897
 898         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 899                 rxq = dev->data->rx_queues[i];
 900
 901                 if (rxq) {
 902                         axgbe_rx_queue_release(rxq);
 903                         dev->data->rx_queues[i] = NULL;
 904                 }
 905         }
 906
 907         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 908                 txq = dev->data->tx_queues[i];
 909
 910                 if (txq) {
 911                         axgbe_tx_queue_release(txq);
 912                         dev->data->tx_queues[i] = NULL;
 913                 }
 914         }
 915 }
 916
 917 int
 918 axgbe_dev_rx_descriptor_status(void *rx_queue, uint16_t offset)
 919 {
 920         struct axgbe_rx_queue *rxq = rx_queue;
 921         volatile union axgbe_rx_desc *desc;
 922         uint16_t idx;
 923
 924
 925         if (unlikely(offset >= rxq->nb_desc))
 926                 return -EINVAL;
 927
 928         if (offset >= rxq->nb_desc - rxq->dirty)
 929                 return RTE_ETH_RX_DESC_UNAVAIL;
 930
 931         idx = AXGBE_GET_DESC_IDX(rxq, rxq->cur);
 932         desc = &rxq->desc[idx + offset];
 933
 934         if (!AXGMAC_GET_BITS_LE(desc->write.desc3, RX_NORMAL_DESC3, OWN))
 935                 return RTE_ETH_RX_DESC_DONE;
 936
 937         return RTE_ETH_RX_DESC_AVAIL;
 938 }
 939
 940 int
 941 axgbe_dev_tx_descriptor_status(void *tx_queue, uint16_t offset)
 942 {
 943         struct axgbe_tx_queue *txq = tx_queue;
 944         volatile struct axgbe_tx_desc *desc;
 945         uint16_t idx;
 946
 947
 948         if (unlikely(offset >= txq->nb_desc))
 949                 return -EINVAL;
 950
 951         if (offset >= txq->nb_desc - txq->dirty)
 952                 return RTE_ETH_TX_DESC_UNAVAIL;
 953
 954         idx = AXGBE_GET_DESC_IDX(txq, txq->dirty + txq->free_batch_cnt - 1);
 955         desc = &txq->desc[idx + offset];
 956
 957         if (!AXGMAC_GET_BITS_LE(desc->desc3, TX_NORMAL_DESC3, OWN))
 958                 return RTE_ETH_TX_DESC_DONE;
 959
 960         return RTE_ETH_TX_DESC_FULL;
 961 }