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34 #include <sys/queue.h>
44 #include <rte_interrupts.h>
45 #include <rte_byteorder.h>
46 #include <rte_common.h>
48 #include <rte_debug.h>
50 #include <rte_memory.h>
51 #include <rte_memcpy.h>
52 #include <rte_memzone.h>
53 #include <rte_launch.h>
54 #include <rte_tailq.h>
56 #include <rte_per_lcore.h>
57 #include <rte_lcore.h>
58 #include <rte_atomic.h>
59 #include <rte_branch_prediction.h>
61 #include <rte_mempool.h>
62 #include <rte_malloc.h>
64 #include <rte_ether.h>
65 #include <rte_ethdev.h>
66 #include <rte_prefetch.h>
70 #include <rte_string_fns.h>
72 #include "e1000_logs.h"
73 #include "e1000/e1000_api.h"
74 #include "e1000_ethdev.h"
76 static inline struct rte_mbuf *
77 rte_rxmbuf_alloc(struct rte_mempool *mp)
81 m = __rte_mbuf_raw_alloc(mp);
82 __rte_mbuf_sanity_check_raw(m, RTE_MBUF_PKT, 0);
86 #define RTE_MBUF_DATA_DMA_ADDR(mb) \
87 (uint64_t) ((mb)->buf_physaddr + \
88 (uint64_t) ((char *)((mb)->pkt.data) - \
89 (char *)(mb)->buf_addr))
91 #define RTE_MBUF_DATA_DMA_ADDR_DEFAULT(mb) \
92 (uint64_t) ((mb)->buf_physaddr + RTE_PKTMBUF_HEADROOM)
95 * Structure associated with each descriptor of the RX ring of a RX queue.
98 struct rte_mbuf *mbuf; /**< mbuf associated with RX descriptor. */
102 * Structure associated with each descriptor of the TX ring of a TX queue.
104 struct igb_tx_entry {
105 struct rte_mbuf *mbuf; /**< mbuf associated with TX desc, if any. */
106 uint16_t next_id; /**< Index of next descriptor in ring. */
107 uint16_t last_id; /**< Index of last scattered descriptor. */
111 * Structure associated with each RX queue.
113 struct igb_rx_queue {
114 struct rte_mempool *mb_pool; /**< mbuf pool to populate RX ring. */
115 volatile union e1000_adv_rx_desc *rx_ring; /**< RX ring virtual address. */
116 uint64_t rx_ring_phys_addr; /**< RX ring DMA address. */
117 volatile uint32_t *rdt_reg_addr; /**< RDT register address. */
118 volatile uint32_t *rdh_reg_addr; /**< RDH register address. */
119 struct igb_rx_entry *sw_ring; /**< address of RX software ring. */
120 struct rte_mbuf *pkt_first_seg; /**< First segment of current packet. */
121 struct rte_mbuf *pkt_last_seg; /**< Last segment of current packet. */
122 uint16_t nb_rx_desc; /**< number of RX descriptors. */
123 uint16_t rx_tail; /**< current value of RDT register. */
124 uint16_t nb_rx_hold; /**< number of held free RX desc. */
125 uint16_t rx_free_thresh; /**< max free RX desc to hold. */
126 uint16_t queue_id; /**< RX queue index. */
127 uint16_t reg_idx; /**< RX queue register index. */
128 uint8_t port_id; /**< Device port identifier. */
129 uint8_t pthresh; /**< Prefetch threshold register. */
130 uint8_t hthresh; /**< Host threshold register. */
131 uint8_t wthresh; /**< Write-back threshold register. */
132 uint8_t crc_len; /**< 0 if CRC stripped, 4 otherwise. */
133 uint8_t drop_en; /**< If not 0, set SRRCTL.Drop_En. */
137 * Hardware context number
139 enum igb_advctx_num {
140 IGB_CTX_0 = 0, /**< CTX0 */
141 IGB_CTX_1 = 1, /**< CTX1 */
142 IGB_CTX_NUM = 2, /**< CTX_NUM */
146 * Strucutre to check if new context need be built
148 struct igb_advctx_info {
149 uint16_t flags; /**< ol_flags related to context build. */
150 uint32_t cmp_mask; /**< compare mask for vlan_macip_lens */
151 union rte_vlan_macip vlan_macip_lens; /**< vlan, mac & ip length. */
155 * Structure associated with each TX queue.
157 struct igb_tx_queue {
158 volatile union e1000_adv_tx_desc *tx_ring; /**< TX ring address */
159 uint64_t tx_ring_phys_addr; /**< TX ring DMA address. */
160 struct igb_tx_entry *sw_ring; /**< virtual address of SW ring. */
161 volatile uint32_t *tdt_reg_addr; /**< Address of TDT register. */
162 uint32_t txd_type; /**< Device-specific TXD type */
163 uint16_t nb_tx_desc; /**< number of TX descriptors. */
164 uint16_t tx_tail; /**< Current value of TDT register. */
166 /**< Index of first used TX descriptor. */
167 uint16_t queue_id; /**< TX queue index. */
168 uint16_t reg_idx; /**< TX queue register index. */
169 uint8_t port_id; /**< Device port identifier. */
170 uint8_t pthresh; /**< Prefetch threshold register. */
171 uint8_t hthresh; /**< Host threshold register. */
172 uint8_t wthresh; /**< Write-back threshold register. */
174 /**< Current used hardware descriptor. */
176 /**< Start context position for transmit queue. */
177 struct igb_advctx_info ctx_cache[IGB_CTX_NUM];
178 /**< Hardware context history.*/
182 #define RTE_PMD_USE_PREFETCH
185 #ifdef RTE_PMD_USE_PREFETCH
186 #define rte_igb_prefetch(p) rte_prefetch0(p)
188 #define rte_igb_prefetch(p) do {} while(0)
191 #ifdef RTE_PMD_PACKET_PREFETCH
192 #define rte_packet_prefetch(p) rte_prefetch1(p)
194 #define rte_packet_prefetch(p) do {} while(0)
198 * Macro for VMDq feature for 1 GbE NIC.
200 #define E1000_VMOLR_SIZE (8)
202 /*********************************************************************
206 **********************************************************************/
209 * Advanced context descriptor are almost same between igb/ixgbe
210 * This is a separate function, looking for optimization opportunity here
211 * Rework required to go with the pre-defined values.
215 igbe_set_xmit_ctx(struct igb_tx_queue* txq,
216 volatile struct e1000_adv_tx_context_desc *ctx_txd,
217 uint16_t ol_flags, uint32_t vlan_macip_lens)
219 uint32_t type_tucmd_mlhl;
220 uint32_t mss_l4len_idx;
221 uint32_t ctx_idx, ctx_curr;
224 ctx_curr = txq->ctx_curr;
225 ctx_idx = ctx_curr + txq->ctx_start;
230 if (ol_flags & PKT_TX_VLAN_PKT) {
231 cmp_mask |= TX_VLAN_CMP_MASK;
234 if (ol_flags & PKT_TX_IP_CKSUM) {
235 type_tucmd_mlhl = E1000_ADVTXD_TUCMD_IPV4;
236 cmp_mask |= TX_MAC_LEN_CMP_MASK;
239 /* Specify which HW CTX to upload. */
240 mss_l4len_idx = (ctx_idx << E1000_ADVTXD_IDX_SHIFT);
241 switch (ol_flags & PKT_TX_L4_MASK) {
242 case PKT_TX_UDP_CKSUM:
243 type_tucmd_mlhl |= E1000_ADVTXD_TUCMD_L4T_UDP |
244 E1000_ADVTXD_DTYP_CTXT | E1000_ADVTXD_DCMD_DEXT;
245 mss_l4len_idx |= sizeof(struct udp_hdr) << E1000_ADVTXD_L4LEN_SHIFT;
246 cmp_mask |= TX_MACIP_LEN_CMP_MASK;
248 case PKT_TX_TCP_CKSUM:
249 type_tucmd_mlhl |= E1000_ADVTXD_TUCMD_L4T_TCP |
250 E1000_ADVTXD_DTYP_CTXT | E1000_ADVTXD_DCMD_DEXT;
251 mss_l4len_idx |= sizeof(struct tcp_hdr) << E1000_ADVTXD_L4LEN_SHIFT;
252 cmp_mask |= TX_MACIP_LEN_CMP_MASK;
254 case PKT_TX_SCTP_CKSUM:
255 type_tucmd_mlhl |= E1000_ADVTXD_TUCMD_L4T_SCTP |
256 E1000_ADVTXD_DTYP_CTXT | E1000_ADVTXD_DCMD_DEXT;
257 mss_l4len_idx |= sizeof(struct sctp_hdr) << E1000_ADVTXD_L4LEN_SHIFT;
258 cmp_mask |= TX_MACIP_LEN_CMP_MASK;
261 type_tucmd_mlhl |= E1000_ADVTXD_TUCMD_L4T_RSV |
262 E1000_ADVTXD_DTYP_CTXT | E1000_ADVTXD_DCMD_DEXT;
266 txq->ctx_cache[ctx_curr].flags = ol_flags;
267 txq->ctx_cache[ctx_curr].cmp_mask = cmp_mask;
268 txq->ctx_cache[ctx_curr].vlan_macip_lens.data =
269 vlan_macip_lens & cmp_mask;
271 ctx_txd->type_tucmd_mlhl = rte_cpu_to_le_32(type_tucmd_mlhl);
272 ctx_txd->vlan_macip_lens = rte_cpu_to_le_32(vlan_macip_lens);
273 ctx_txd->mss_l4len_idx = rte_cpu_to_le_32(mss_l4len_idx);
274 ctx_txd->seqnum_seed = 0;
278 * Check which hardware context can be used. Use the existing match
279 * or create a new context descriptor.
281 static inline uint32_t
282 what_advctx_update(struct igb_tx_queue *txq, uint16_t flags,
283 uint32_t vlan_macip_lens)
285 /* If match with the current context */
286 if (likely((txq->ctx_cache[txq->ctx_curr].flags == flags) &&
287 (txq->ctx_cache[txq->ctx_curr].vlan_macip_lens.data ==
288 (txq->ctx_cache[txq->ctx_curr].cmp_mask & vlan_macip_lens)))) {
289 return txq->ctx_curr;
292 /* If match with the second context */
294 if (likely((txq->ctx_cache[txq->ctx_curr].flags == flags) &&
295 (txq->ctx_cache[txq->ctx_curr].vlan_macip_lens.data ==
296 (txq->ctx_cache[txq->ctx_curr].cmp_mask & vlan_macip_lens)))) {
297 return txq->ctx_curr;
300 /* Mismatch, use the previous context */
301 return (IGB_CTX_NUM);
304 static inline uint32_t
305 tx_desc_cksum_flags_to_olinfo(uint16_t ol_flags)
307 static const uint32_t l4_olinfo[2] = {0, E1000_ADVTXD_POPTS_TXSM};
308 static const uint32_t l3_olinfo[2] = {0, E1000_ADVTXD_POPTS_IXSM};
311 tmp = l4_olinfo[(ol_flags & PKT_TX_L4_MASK) != PKT_TX_L4_NO_CKSUM];
312 tmp |= l3_olinfo[(ol_flags & PKT_TX_IP_CKSUM) != 0];
316 static inline uint32_t
317 tx_desc_vlan_flags_to_cmdtype(uint16_t ol_flags)
319 static uint32_t vlan_cmd[2] = {0, E1000_ADVTXD_DCMD_VLE};
320 return vlan_cmd[(ol_flags & PKT_TX_VLAN_PKT) != 0];
324 eth_igb_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts,
327 struct igb_tx_queue *txq;
328 struct igb_tx_entry *sw_ring;
329 struct igb_tx_entry *txe, *txn;
330 volatile union e1000_adv_tx_desc *txr;
331 volatile union e1000_adv_tx_desc *txd;
332 struct rte_mbuf *tx_pkt;
333 struct rte_mbuf *m_seg;
334 uint64_t buf_dma_addr;
335 uint32_t olinfo_status;
336 uint32_t cmd_type_len;
345 uint32_t new_ctx = 0;
347 uint32_t vlan_macip_lens;
350 sw_ring = txq->sw_ring;
352 tx_id = txq->tx_tail;
353 txe = &sw_ring[tx_id];
355 for (nb_tx = 0; nb_tx < nb_pkts; nb_tx++) {
357 pkt_len = tx_pkt->pkt.pkt_len;
359 RTE_MBUF_PREFETCH_TO_FREE(txe->mbuf);
362 * The number of descriptors that must be allocated for a
363 * packet is the number of segments of that packet, plus 1
364 * Context Descriptor for the VLAN Tag Identifier, if any.
365 * Determine the last TX descriptor to allocate in the TX ring
366 * for the packet, starting from the current position (tx_id)
369 tx_last = (uint16_t) (tx_id + tx_pkt->pkt.nb_segs - 1);
371 ol_flags = tx_pkt->ol_flags;
372 vlan_macip_lens = tx_pkt->pkt.vlan_macip.data;
373 tx_ol_req = (uint16_t)(ol_flags & PKT_TX_OFFLOAD_MASK);
375 /* If a Context Descriptor need be built . */
377 ctx = what_advctx_update(txq, tx_ol_req,
379 /* Only allocate context descriptor if required*/
380 new_ctx = (ctx == IGB_CTX_NUM);
382 tx_last = (uint16_t) (tx_last + new_ctx);
384 if (tx_last >= txq->nb_tx_desc)
385 tx_last = (uint16_t) (tx_last - txq->nb_tx_desc);
387 PMD_TX_LOG(DEBUG, "port_id=%u queue_id=%u pktlen=%u"
388 " tx_first=%u tx_last=%u\n",
389 (unsigned) txq->port_id,
390 (unsigned) txq->queue_id,
396 * Check if there are enough free descriptors in the TX ring
397 * to transmit the next packet.
398 * This operation is based on the two following rules:
400 * 1- Only check that the last needed TX descriptor can be
401 * allocated (by construction, if that descriptor is free,
402 * all intermediate ones are also free).
404 * For this purpose, the index of the last TX descriptor
405 * used for a packet (the "last descriptor" of a packet)
406 * is recorded in the TX entries (the last one included)
407 * that are associated with all TX descriptors allocated
410 * 2- Avoid to allocate the last free TX descriptor of the
411 * ring, in order to never set the TDT register with the
412 * same value stored in parallel by the NIC in the TDH
413 * register, which makes the TX engine of the NIC enter
414 * in a deadlock situation.
416 * By extension, avoid to allocate a free descriptor that
417 * belongs to the last set of free descriptors allocated
418 * to the same packet previously transmitted.
422 * The "last descriptor" of the previously sent packet, if any,
423 * which used the last descriptor to allocate.
425 tx_end = sw_ring[tx_last].last_id;
428 * The next descriptor following that "last descriptor" in the
431 tx_end = sw_ring[tx_end].next_id;
434 * The "last descriptor" associated with that next descriptor.
436 tx_end = sw_ring[tx_end].last_id;
439 * Check that this descriptor is free.
441 if (! (txr[tx_end].wb.status & E1000_TXD_STAT_DD)) {
448 * Set common flags of all TX Data Descriptors.
450 * The following bits must be set in all Data Descriptors:
451 * - E1000_ADVTXD_DTYP_DATA
452 * - E1000_ADVTXD_DCMD_DEXT
454 * The following bits must be set in the first Data Descriptor
455 * and are ignored in the other ones:
456 * - E1000_ADVTXD_DCMD_IFCS
457 * - E1000_ADVTXD_MAC_1588
458 * - E1000_ADVTXD_DCMD_VLE
460 * The following bits must only be set in the last Data
462 * - E1000_TXD_CMD_EOP
464 * The following bits can be set in any Data Descriptor, but
465 * are only set in the last Data Descriptor:
468 cmd_type_len = txq->txd_type |
469 E1000_ADVTXD_DCMD_IFCS | E1000_ADVTXD_DCMD_DEXT;
470 olinfo_status = (pkt_len << E1000_ADVTXD_PAYLEN_SHIFT);
471 #if defined(RTE_LIBRTE_IEEE1588)
472 if (ol_flags & PKT_TX_IEEE1588_TMST)
473 cmd_type_len |= E1000_ADVTXD_MAC_TSTAMP;
476 /* Setup TX Advanced context descriptor if required */
478 volatile struct e1000_adv_tx_context_desc *
481 ctx_txd = (volatile struct
482 e1000_adv_tx_context_desc *)
485 txn = &sw_ring[txe->next_id];
486 RTE_MBUF_PREFETCH_TO_FREE(txn->mbuf);
488 if (txe->mbuf != NULL) {
489 rte_pktmbuf_free_seg(txe->mbuf);
493 igbe_set_xmit_ctx(txq, ctx_txd, tx_ol_req,
496 txe->last_id = tx_last;
497 tx_id = txe->next_id;
501 /* Setup the TX Advanced Data Descriptor */
502 cmd_type_len |= tx_desc_vlan_flags_to_cmdtype(ol_flags);
503 olinfo_status |= tx_desc_cksum_flags_to_olinfo(ol_flags);
504 olinfo_status |= (ctx << E1000_ADVTXD_IDX_SHIFT);
509 txn = &sw_ring[txe->next_id];
512 if (txe->mbuf != NULL)
513 rte_pktmbuf_free_seg(txe->mbuf);
517 * Set up transmit descriptor.
519 slen = (uint16_t) m_seg->pkt.data_len;
520 buf_dma_addr = RTE_MBUF_DATA_DMA_ADDR(m_seg);
521 txd->read.buffer_addr =
522 rte_cpu_to_le_64(buf_dma_addr);
523 txd->read.cmd_type_len =
524 rte_cpu_to_le_32(cmd_type_len | slen);
525 txd->read.olinfo_status =
526 rte_cpu_to_le_32(olinfo_status);
527 txe->last_id = tx_last;
528 tx_id = txe->next_id;
530 m_seg = m_seg->pkt.next;
531 } while (m_seg != NULL);
534 * The last packet data descriptor needs End Of Packet (EOP)
535 * and Report Status (RS).
537 txd->read.cmd_type_len |=
538 rte_cpu_to_le_32(E1000_TXD_CMD_EOP | E1000_TXD_CMD_RS);
544 * Set the Transmit Descriptor Tail (TDT).
546 E1000_PCI_REG_WRITE(txq->tdt_reg_addr, tx_id);
547 PMD_TX_LOG(DEBUG, "port_id=%u queue_id=%u tx_tail=%u nb_tx=%u",
548 (unsigned) txq->port_id, (unsigned) txq->queue_id,
549 (unsigned) tx_id, (unsigned) nb_tx);
550 txq->tx_tail = tx_id;
555 /*********************************************************************
559 **********************************************************************/
560 static inline uint16_t
561 rx_desc_hlen_type_rss_to_pkt_flags(uint32_t hl_tp_rs)
565 static uint16_t ip_pkt_types_map[16] = {
566 0, PKT_RX_IPV4_HDR, PKT_RX_IPV4_HDR_EXT, PKT_RX_IPV4_HDR_EXT,
567 PKT_RX_IPV6_HDR, 0, 0, 0,
568 PKT_RX_IPV6_HDR_EXT, 0, 0, 0,
569 PKT_RX_IPV6_HDR_EXT, 0, 0, 0,
572 #if defined(RTE_LIBRTE_IEEE1588)
573 static uint32_t ip_pkt_etqf_map[8] = {
574 0, 0, 0, PKT_RX_IEEE1588_PTP,
578 pkt_flags = (uint16_t)((hl_tp_rs & E1000_RXDADV_PKTTYPE_ETQF) ?
579 ip_pkt_etqf_map[(hl_tp_rs >> 4) & 0x07] :
580 ip_pkt_types_map[(hl_tp_rs >> 4) & 0x0F]);
582 pkt_flags = (uint16_t)((hl_tp_rs & E1000_RXDADV_PKTTYPE_ETQF) ? 0 :
583 ip_pkt_types_map[(hl_tp_rs >> 4) & 0x0F]);
585 return (uint16_t)(pkt_flags | (((hl_tp_rs & 0x0F) == 0) ?
586 0 : PKT_RX_RSS_HASH));
589 static inline uint16_t
590 rx_desc_status_to_pkt_flags(uint32_t rx_status)
594 /* Check if VLAN present */
595 pkt_flags = (uint16_t)((rx_status & E1000_RXD_STAT_VP) ?
596 PKT_RX_VLAN_PKT : 0);
598 #if defined(RTE_LIBRTE_IEEE1588)
599 if (rx_status & E1000_RXD_STAT_TMST)
600 pkt_flags = (uint16_t)(pkt_flags | PKT_RX_IEEE1588_TMST);
605 static inline uint16_t
606 rx_desc_error_to_pkt_flags(uint32_t rx_status)
609 * Bit 30: IPE, IPv4 checksum error
610 * Bit 29: L4I, L4I integrity error
613 static uint16_t error_to_pkt_flags_map[4] = {
614 0, PKT_RX_L4_CKSUM_BAD, PKT_RX_IP_CKSUM_BAD,
615 PKT_RX_IP_CKSUM_BAD | PKT_RX_L4_CKSUM_BAD
617 return error_to_pkt_flags_map[(rx_status >>
618 E1000_RXD_ERR_CKSUM_BIT) & E1000_RXD_ERR_CKSUM_MSK];
622 eth_igb_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts,
625 struct igb_rx_queue *rxq;
626 volatile union e1000_adv_rx_desc *rx_ring;
627 volatile union e1000_adv_rx_desc *rxdp;
628 struct igb_rx_entry *sw_ring;
629 struct igb_rx_entry *rxe;
630 struct rte_mbuf *rxm;
631 struct rte_mbuf *nmb;
632 union e1000_adv_rx_desc rxd;
635 uint32_t hlen_type_rss;
645 rx_id = rxq->rx_tail;
646 rx_ring = rxq->rx_ring;
647 sw_ring = rxq->sw_ring;
648 while (nb_rx < nb_pkts) {
650 * The order of operations here is important as the DD status
651 * bit must not be read after any other descriptor fields.
652 * rx_ring and rxdp are pointing to volatile data so the order
653 * of accesses cannot be reordered by the compiler. If they were
654 * not volatile, they could be reordered which could lead to
655 * using invalid descriptor fields when read from rxd.
657 rxdp = &rx_ring[rx_id];
658 staterr = rxdp->wb.upper.status_error;
659 if (! (staterr & rte_cpu_to_le_32(E1000_RXD_STAT_DD)))
666 * If the E1000_RXD_STAT_EOP flag is not set, the RX packet is
667 * likely to be invalid and to be dropped by the various
668 * validation checks performed by the network stack.
670 * Allocate a new mbuf to replenish the RX ring descriptor.
671 * If the allocation fails:
672 * - arrange for that RX descriptor to be the first one
673 * being parsed the next time the receive function is
674 * invoked [on the same queue].
676 * - Stop parsing the RX ring and return immediately.
678 * This policy do not drop the packet received in the RX
679 * descriptor for which the allocation of a new mbuf failed.
680 * Thus, it allows that packet to be later retrieved if
681 * mbuf have been freed in the mean time.
682 * As a side effect, holding RX descriptors instead of
683 * systematically giving them back to the NIC may lead to
684 * RX ring exhaustion situations.
685 * However, the NIC can gracefully prevent such situations
686 * to happen by sending specific "back-pressure" flow control
687 * frames to its peer(s).
689 PMD_RX_LOG(DEBUG, "\nport_id=%u queue_id=%u rx_id=%u "
690 "staterr=0x%x pkt_len=%u\n",
691 (unsigned) rxq->port_id, (unsigned) rxq->queue_id,
692 (unsigned) rx_id, (unsigned) staterr,
693 (unsigned) rte_le_to_cpu_16(rxd.wb.upper.length));
695 nmb = rte_rxmbuf_alloc(rxq->mb_pool);
697 PMD_RX_LOG(DEBUG, "RX mbuf alloc failed port_id=%u "
698 "queue_id=%u\n", (unsigned) rxq->port_id,
699 (unsigned) rxq->queue_id);
700 rte_eth_devices[rxq->port_id].data->rx_mbuf_alloc_failed++;
705 rxe = &sw_ring[rx_id];
707 if (rx_id == rxq->nb_rx_desc)
710 /* Prefetch next mbuf while processing current one. */
711 rte_igb_prefetch(sw_ring[rx_id].mbuf);
714 * When next RX descriptor is on a cache-line boundary,
715 * prefetch the next 4 RX descriptors and the next 8 pointers
718 if ((rx_id & 0x3) == 0) {
719 rte_igb_prefetch(&rx_ring[rx_id]);
720 rte_igb_prefetch(&sw_ring[rx_id]);
726 rte_cpu_to_le_64(RTE_MBUF_DATA_DMA_ADDR_DEFAULT(nmb));
727 rxdp->read.hdr_addr = dma_addr;
728 rxdp->read.pkt_addr = dma_addr;
731 * Initialize the returned mbuf.
732 * 1) setup generic mbuf fields:
733 * - number of segments,
736 * - RX port identifier.
737 * 2) integrate hardware offload data, if any:
739 * - IP checksum flag,
740 * - VLAN TCI, if any,
743 pkt_len = (uint16_t) (rte_le_to_cpu_16(rxd.wb.upper.length) -
745 rxm->pkt.data = (char*) rxm->buf_addr + RTE_PKTMBUF_HEADROOM;
746 rte_packet_prefetch(rxm->pkt.data);
747 rxm->pkt.nb_segs = 1;
748 rxm->pkt.next = NULL;
749 rxm->pkt.pkt_len = pkt_len;
750 rxm->pkt.data_len = pkt_len;
751 rxm->pkt.in_port = rxq->port_id;
753 rxm->pkt.hash.rss = rxd.wb.lower.hi_dword.rss;
754 hlen_type_rss = rte_le_to_cpu_32(rxd.wb.lower.lo_dword.data);
755 /* Only valid if PKT_RX_VLAN_PKT set in pkt_flags */
756 rxm->pkt.vlan_macip.f.vlan_tci =
757 rte_le_to_cpu_16(rxd.wb.upper.vlan);
759 pkt_flags = rx_desc_hlen_type_rss_to_pkt_flags(hlen_type_rss);
760 pkt_flags = (uint16_t)(pkt_flags |
761 rx_desc_status_to_pkt_flags(staterr));
762 pkt_flags = (uint16_t)(pkt_flags |
763 rx_desc_error_to_pkt_flags(staterr));
764 rxm->ol_flags = pkt_flags;
767 * Store the mbuf address into the next entry of the array
768 * of returned packets.
770 rx_pkts[nb_rx++] = rxm;
772 rxq->rx_tail = rx_id;
775 * If the number of free RX descriptors is greater than the RX free
776 * threshold of the queue, advance the Receive Descriptor Tail (RDT)
778 * Update the RDT with the value of the last processed RX descriptor
779 * minus 1, to guarantee that the RDT register is never equal to the
780 * RDH register, which creates a "full" ring situtation from the
781 * hardware point of view...
783 nb_hold = (uint16_t) (nb_hold + rxq->nb_rx_hold);
784 if (nb_hold > rxq->rx_free_thresh) {
785 PMD_RX_LOG(DEBUG, "port_id=%u queue_id=%u rx_tail=%u "
786 "nb_hold=%u nb_rx=%u\n",
787 (unsigned) rxq->port_id, (unsigned) rxq->queue_id,
788 (unsigned) rx_id, (unsigned) nb_hold,
790 rx_id = (uint16_t) ((rx_id == 0) ?
791 (rxq->nb_rx_desc - 1) : (rx_id - 1));
792 E1000_PCI_REG_WRITE(rxq->rdt_reg_addr, rx_id);
795 rxq->nb_rx_hold = nb_hold;
800 eth_igb_recv_scattered_pkts(void *rx_queue, struct rte_mbuf **rx_pkts,
803 struct igb_rx_queue *rxq;
804 volatile union e1000_adv_rx_desc *rx_ring;
805 volatile union e1000_adv_rx_desc *rxdp;
806 struct igb_rx_entry *sw_ring;
807 struct igb_rx_entry *rxe;
808 struct rte_mbuf *first_seg;
809 struct rte_mbuf *last_seg;
810 struct rte_mbuf *rxm;
811 struct rte_mbuf *nmb;
812 union e1000_adv_rx_desc rxd;
813 uint64_t dma; /* Physical address of mbuf data buffer */
815 uint32_t hlen_type_rss;
825 rx_id = rxq->rx_tail;
826 rx_ring = rxq->rx_ring;
827 sw_ring = rxq->sw_ring;
830 * Retrieve RX context of current packet, if any.
832 first_seg = rxq->pkt_first_seg;
833 last_seg = rxq->pkt_last_seg;
835 while (nb_rx < nb_pkts) {
838 * The order of operations here is important as the DD status
839 * bit must not be read after any other descriptor fields.
840 * rx_ring and rxdp are pointing to volatile data so the order
841 * of accesses cannot be reordered by the compiler. If they were
842 * not volatile, they could be reordered which could lead to
843 * using invalid descriptor fields when read from rxd.
845 rxdp = &rx_ring[rx_id];
846 staterr = rxdp->wb.upper.status_error;
847 if (! (staterr & rte_cpu_to_le_32(E1000_RXD_STAT_DD)))
854 * Allocate a new mbuf to replenish the RX ring descriptor.
855 * If the allocation fails:
856 * - arrange for that RX descriptor to be the first one
857 * being parsed the next time the receive function is
858 * invoked [on the same queue].
860 * - Stop parsing the RX ring and return immediately.
862 * This policy does not drop the packet received in the RX
863 * descriptor for which the allocation of a new mbuf failed.
864 * Thus, it allows that packet to be later retrieved if
865 * mbuf have been freed in the mean time.
866 * As a side effect, holding RX descriptors instead of
867 * systematically giving them back to the NIC may lead to
868 * RX ring exhaustion situations.
869 * However, the NIC can gracefully prevent such situations
870 * to happen by sending specific "back-pressure" flow control
871 * frames to its peer(s).
873 PMD_RX_LOG(DEBUG, "\nport_id=%u queue_id=%u rx_id=%u "
874 "staterr=0x%x data_len=%u\n",
875 (unsigned) rxq->port_id, (unsigned) rxq->queue_id,
876 (unsigned) rx_id, (unsigned) staterr,
877 (unsigned) rte_le_to_cpu_16(rxd.wb.upper.length));
879 nmb = rte_rxmbuf_alloc(rxq->mb_pool);
881 PMD_RX_LOG(DEBUG, "RX mbuf alloc failed port_id=%u "
882 "queue_id=%u\n", (unsigned) rxq->port_id,
883 (unsigned) rxq->queue_id);
884 rte_eth_devices[rxq->port_id].data->rx_mbuf_alloc_failed++;
889 rxe = &sw_ring[rx_id];
891 if (rx_id == rxq->nb_rx_desc)
894 /* Prefetch next mbuf while processing current one. */
895 rte_igb_prefetch(sw_ring[rx_id].mbuf);
898 * When next RX descriptor is on a cache-line boundary,
899 * prefetch the next 4 RX descriptors and the next 8 pointers
902 if ((rx_id & 0x3) == 0) {
903 rte_igb_prefetch(&rx_ring[rx_id]);
904 rte_igb_prefetch(&sw_ring[rx_id]);
908 * Update RX descriptor with the physical address of the new
909 * data buffer of the new allocated mbuf.
913 dma = rte_cpu_to_le_64(RTE_MBUF_DATA_DMA_ADDR_DEFAULT(nmb));
914 rxdp->read.pkt_addr = dma;
915 rxdp->read.hdr_addr = dma;
918 * Set data length & data buffer address of mbuf.
920 data_len = rte_le_to_cpu_16(rxd.wb.upper.length);
921 rxm->pkt.data_len = data_len;
922 rxm->pkt.data = (char*) rxm->buf_addr + RTE_PKTMBUF_HEADROOM;
925 * If this is the first buffer of the received packet,
926 * set the pointer to the first mbuf of the packet and
927 * initialize its context.
928 * Otherwise, update the total length and the number of segments
929 * of the current scattered packet, and update the pointer to
930 * the last mbuf of the current packet.
932 if (first_seg == NULL) {
934 first_seg->pkt.pkt_len = data_len;
935 first_seg->pkt.nb_segs = 1;
937 first_seg->pkt.pkt_len += data_len;
938 first_seg->pkt.nb_segs++;
939 last_seg->pkt.next = rxm;
943 * If this is not the last buffer of the received packet,
944 * update the pointer to the last mbuf of the current scattered
945 * packet and continue to parse the RX ring.
947 if (! (staterr & E1000_RXD_STAT_EOP)) {
953 * This is the last buffer of the received packet.
954 * If the CRC is not stripped by the hardware:
955 * - Subtract the CRC length from the total packet length.
956 * - If the last buffer only contains the whole CRC or a part
957 * of it, free the mbuf associated to the last buffer.
958 * If part of the CRC is also contained in the previous
959 * mbuf, subtract the length of that CRC part from the
960 * data length of the previous mbuf.
962 rxm->pkt.next = NULL;
963 if (unlikely(rxq->crc_len > 0)) {
964 first_seg->pkt.pkt_len -= ETHER_CRC_LEN;
965 if (data_len <= ETHER_CRC_LEN) {
966 rte_pktmbuf_free_seg(rxm);
967 first_seg->pkt.nb_segs--;
968 last_seg->pkt.data_len = (uint16_t)
969 (last_seg->pkt.data_len -
970 (ETHER_CRC_LEN - data_len));
971 last_seg->pkt.next = NULL;
974 (uint16_t) (data_len - ETHER_CRC_LEN);
978 * Initialize the first mbuf of the returned packet:
979 * - RX port identifier,
980 * - hardware offload data, if any:
982 * - IP checksum flag,
983 * - VLAN TCI, if any,
986 first_seg->pkt.in_port = rxq->port_id;
987 first_seg->pkt.hash.rss = rxd.wb.lower.hi_dword.rss;
990 * The vlan_tci field is only valid when PKT_RX_VLAN_PKT is
991 * set in the pkt_flags field.
993 first_seg->pkt.vlan_macip.f.vlan_tci =
994 rte_le_to_cpu_16(rxd.wb.upper.vlan);
995 hlen_type_rss = rte_le_to_cpu_32(rxd.wb.lower.lo_dword.data);
996 pkt_flags = rx_desc_hlen_type_rss_to_pkt_flags(hlen_type_rss);
997 pkt_flags = (uint16_t)(pkt_flags |
998 rx_desc_status_to_pkt_flags(staterr));
999 pkt_flags = (uint16_t)(pkt_flags |
1000 rx_desc_error_to_pkt_flags(staterr));
1001 first_seg->ol_flags = pkt_flags;
1003 /* Prefetch data of first segment, if configured to do so. */
1004 rte_packet_prefetch(first_seg->pkt.data);
1007 * Store the mbuf address into the next entry of the array
1008 * of returned packets.
1010 rx_pkts[nb_rx++] = first_seg;
1013 * Setup receipt context for a new packet.
1019 * Record index of the next RX descriptor to probe.
1021 rxq->rx_tail = rx_id;
1024 * Save receive context.
1026 rxq->pkt_first_seg = first_seg;
1027 rxq->pkt_last_seg = last_seg;
1030 * If the number of free RX descriptors is greater than the RX free
1031 * threshold of the queue, advance the Receive Descriptor Tail (RDT)
1033 * Update the RDT with the value of the last processed RX descriptor
1034 * minus 1, to guarantee that the RDT register is never equal to the
1035 * RDH register, which creates a "full" ring situtation from the
1036 * hardware point of view...
1038 nb_hold = (uint16_t) (nb_hold + rxq->nb_rx_hold);
1039 if (nb_hold > rxq->rx_free_thresh) {
1040 PMD_RX_LOG(DEBUG, "port_id=%u queue_id=%u rx_tail=%u "
1041 "nb_hold=%u nb_rx=%u\n",
1042 (unsigned) rxq->port_id, (unsigned) rxq->queue_id,
1043 (unsigned) rx_id, (unsigned) nb_hold,
1045 rx_id = (uint16_t) ((rx_id == 0) ?
1046 (rxq->nb_rx_desc - 1) : (rx_id - 1));
1047 E1000_PCI_REG_WRITE(rxq->rdt_reg_addr, rx_id);
1050 rxq->nb_rx_hold = nb_hold;
1055 * Rings setup and release.
1057 * TDBA/RDBA should be aligned on 16 byte boundary. But TDLEN/RDLEN should be
1058 * multiple of 128 bytes. So we align TDBA/RDBA on 128 byte boundary.
1059 * This will also optimize cache line size effect.
1060 * H/W supports up to cache line size 128.
1062 #define IGB_ALIGN 128
1065 * Maximum number of Ring Descriptors.
1067 * Since RDLEN/TDLEN should be multiple of 128bytes, the number of ring
1068 * desscriptors should meet the following condition:
1069 * (num_ring_desc * sizeof(struct e1000_rx/tx_desc)) % 128 == 0
1071 #define IGB_MIN_RING_DESC 32
1072 #define IGB_MAX_RING_DESC 4096
1074 static const struct rte_memzone *
1075 ring_dma_zone_reserve(struct rte_eth_dev *dev, const char *ring_name,
1076 uint16_t queue_id, uint32_t ring_size, int socket_id)
1078 char z_name[RTE_MEMZONE_NAMESIZE];
1079 const struct rte_memzone *mz;
1081 rte_snprintf(z_name, sizeof(z_name), "%s_%s_%d_%d",
1082 dev->driver->pci_drv.name, ring_name,
1083 dev->data->port_id, queue_id);
1084 mz = rte_memzone_lookup(z_name);
1088 #ifdef RTE_LIBRTE_XEN_DOM0
1089 return rte_memzone_reserve_bounded(z_name, ring_size,
1090 socket_id, 0, IGB_ALIGN, RTE_PGSIZE_2M);
1092 return rte_memzone_reserve_aligned(z_name, ring_size,
1093 socket_id, 0, IGB_ALIGN);
1098 igb_tx_queue_release_mbufs(struct igb_tx_queue *txq)
1102 if (txq->sw_ring != NULL) {
1103 for (i = 0; i < txq->nb_tx_desc; i++) {
1104 if (txq->sw_ring[i].mbuf != NULL) {
1105 rte_pktmbuf_free_seg(txq->sw_ring[i].mbuf);
1106 txq->sw_ring[i].mbuf = NULL;
1113 igb_tx_queue_release(struct igb_tx_queue *txq)
1116 igb_tx_queue_release_mbufs(txq);
1117 rte_free(txq->sw_ring);
1123 eth_igb_tx_queue_release(void *txq)
1125 igb_tx_queue_release(txq);
1129 igb_reset_tx_queue_stat(struct igb_tx_queue *txq)
1134 memset((void*)&txq->ctx_cache, 0,
1135 IGB_CTX_NUM * sizeof(struct igb_advctx_info));
1139 igb_reset_tx_queue(struct igb_tx_queue *txq, struct rte_eth_dev *dev)
1141 static const union e1000_adv_tx_desc zeroed_desc = { .read = {
1143 struct igb_tx_entry *txe = txq->sw_ring;
1145 struct e1000_hw *hw;
1147 hw = E1000_DEV_PRIVATE_TO_HW(dev->data->dev_private);
1148 /* Zero out HW ring memory */
1149 for (i = 0; i < txq->nb_tx_desc; i++) {
1150 txq->tx_ring[i] = zeroed_desc;
1153 /* Initialize ring entries */
1154 prev = (uint16_t)(txq->nb_tx_desc - 1);
1155 for (i = 0; i < txq->nb_tx_desc; i++) {
1156 volatile union e1000_adv_tx_desc *txd = &(txq->tx_ring[i]);
1158 txd->wb.status = E1000_TXD_STAT_DD;
1161 txe[prev].next_id = i;
1165 txq->txd_type = E1000_ADVTXD_DTYP_DATA;
1166 /* 82575 specific, each tx queue will use 2 hw contexts */
1167 if (hw->mac.type == e1000_82575)
1168 txq->ctx_start = txq->queue_id * IGB_CTX_NUM;
1170 igb_reset_tx_queue_stat(txq);
1174 eth_igb_tx_queue_setup(struct rte_eth_dev *dev,
1177 unsigned int socket_id,
1178 const struct rte_eth_txconf *tx_conf)
1180 const struct rte_memzone *tz;
1181 struct igb_tx_queue *txq;
1182 struct e1000_hw *hw;
1185 hw = E1000_DEV_PRIVATE_TO_HW(dev->data->dev_private);
1188 * Validate number of transmit descriptors.
1189 * It must not exceed hardware maximum, and must be multiple
1192 if (((nb_desc * sizeof(union e1000_adv_tx_desc)) % IGB_ALIGN) != 0 ||
1193 (nb_desc > IGB_MAX_RING_DESC) || (nb_desc < IGB_MIN_RING_DESC)) {
1198 * The tx_free_thresh and tx_rs_thresh values are not used in the 1G
1201 if (tx_conf->tx_free_thresh != 0)
1202 RTE_LOG(WARNING, PMD,
1203 "The tx_free_thresh parameter is not "
1204 "used for the 1G driver.\n");
1205 if (tx_conf->tx_rs_thresh != 0)
1206 RTE_LOG(WARNING, PMD,
1207 "The tx_rs_thresh parameter is not "
1208 "used for the 1G driver.\n");
1209 if (tx_conf->tx_thresh.wthresh == 0)
1210 RTE_LOG(WARNING, PMD,
1211 "To improve 1G driver performance, consider setting "
1212 "the TX WTHRESH value to 4, 8, or 16.\n");
1214 /* Free memory prior to re-allocation if needed */
1215 if (dev->data->tx_queues[queue_idx] != NULL)
1216 igb_tx_queue_release(dev->data->tx_queues[queue_idx]);
1218 /* First allocate the tx queue data structure */
1219 txq = rte_zmalloc("ethdev TX queue", sizeof(struct igb_tx_queue),
1225 * Allocate TX ring hardware descriptors. A memzone large enough to
1226 * handle the maximum ring size is allocated in order to allow for
1227 * resizing in later calls to the queue setup function.
1229 size = sizeof(union e1000_adv_tx_desc) * IGB_MAX_RING_DESC;
1230 tz = ring_dma_zone_reserve(dev, "tx_ring", queue_idx,
1233 igb_tx_queue_release(txq);
1237 txq->nb_tx_desc = nb_desc;
1238 txq->pthresh = tx_conf->tx_thresh.pthresh;
1239 txq->hthresh = tx_conf->tx_thresh.hthresh;
1240 txq->wthresh = tx_conf->tx_thresh.wthresh;
1241 txq->queue_id = queue_idx;
1242 txq->reg_idx = (uint16_t)((RTE_ETH_DEV_SRIOV(dev).active == 0) ?
1243 queue_idx : RTE_ETH_DEV_SRIOV(dev).def_pool_q_idx + queue_idx);
1244 txq->port_id = dev->data->port_id;
1246 txq->tdt_reg_addr = E1000_PCI_REG_ADDR(hw, E1000_TDT(txq->reg_idx));
1247 #ifndef RTE_LIBRTE_XEN_DOM0
1248 txq->tx_ring_phys_addr = (uint64_t) tz->phys_addr;
1250 txq->tx_ring_phys_addr = rte_mem_phy2mch(tz->memseg_id, tz->phys_addr);
1252 txq->tx_ring = (union e1000_adv_tx_desc *) tz->addr;
1253 /* Allocate software ring */
1254 txq->sw_ring = rte_zmalloc("txq->sw_ring",
1255 sizeof(struct igb_tx_entry) * nb_desc,
1257 if (txq->sw_ring == NULL) {
1258 igb_tx_queue_release(txq);
1261 PMD_INIT_LOG(DEBUG, "sw_ring=%p hw_ring=%p dma_addr=0x%"PRIx64"\n",
1262 txq->sw_ring, txq->tx_ring, txq->tx_ring_phys_addr);
1264 igb_reset_tx_queue(txq, dev);
1265 dev->tx_pkt_burst = eth_igb_xmit_pkts;
1266 dev->data->tx_queues[queue_idx] = txq;
1272 igb_rx_queue_release_mbufs(struct igb_rx_queue *rxq)
1276 if (rxq->sw_ring != NULL) {
1277 for (i = 0; i < rxq->nb_rx_desc; i++) {
1278 if (rxq->sw_ring[i].mbuf != NULL) {
1279 rte_pktmbuf_free_seg(rxq->sw_ring[i].mbuf);
1280 rxq->sw_ring[i].mbuf = NULL;
1287 igb_rx_queue_release(struct igb_rx_queue *rxq)
1290 igb_rx_queue_release_mbufs(rxq);
1291 rte_free(rxq->sw_ring);
1297 eth_igb_rx_queue_release(void *rxq)
1299 igb_rx_queue_release(rxq);
1303 igb_reset_rx_queue(struct igb_rx_queue *rxq)
1305 static const union e1000_adv_rx_desc zeroed_desc = { .read = {
1309 /* Zero out HW ring memory */
1310 for (i = 0; i < rxq->nb_rx_desc; i++) {
1311 rxq->rx_ring[i] = zeroed_desc;
1315 rxq->pkt_first_seg = NULL;
1316 rxq->pkt_last_seg = NULL;
1320 eth_igb_rx_queue_setup(struct rte_eth_dev *dev,
1323 unsigned int socket_id,
1324 const struct rte_eth_rxconf *rx_conf,
1325 struct rte_mempool *mp)
1327 const struct rte_memzone *rz;
1328 struct igb_rx_queue *rxq;
1329 struct e1000_hw *hw;
1332 hw = E1000_DEV_PRIVATE_TO_HW(dev->data->dev_private);
1335 * Validate number of receive descriptors.
1336 * It must not exceed hardware maximum, and must be multiple
1339 if (((nb_desc * sizeof(union e1000_adv_rx_desc)) % IGB_ALIGN) != 0 ||
1340 (nb_desc > IGB_MAX_RING_DESC) || (nb_desc < IGB_MIN_RING_DESC)) {
1344 /* Free memory prior to re-allocation if needed */
1345 if (dev->data->rx_queues[queue_idx] != NULL) {
1346 igb_rx_queue_release(dev->data->rx_queues[queue_idx]);
1347 dev->data->rx_queues[queue_idx] = NULL;
1350 /* First allocate the RX queue data structure. */
1351 rxq = rte_zmalloc("ethdev RX queue", sizeof(struct igb_rx_queue),
1356 rxq->nb_rx_desc = nb_desc;
1357 rxq->pthresh = rx_conf->rx_thresh.pthresh;
1358 rxq->hthresh = rx_conf->rx_thresh.hthresh;
1359 rxq->wthresh = rx_conf->rx_thresh.wthresh;
1360 rxq->drop_en = rx_conf->rx_drop_en;
1361 rxq->rx_free_thresh = rx_conf->rx_free_thresh;
1362 rxq->queue_id = queue_idx;
1363 rxq->reg_idx = (uint16_t)((RTE_ETH_DEV_SRIOV(dev).active == 0) ?
1364 queue_idx : RTE_ETH_DEV_SRIOV(dev).def_pool_q_idx + queue_idx);
1365 rxq->port_id = dev->data->port_id;
1366 rxq->crc_len = (uint8_t) ((dev->data->dev_conf.rxmode.hw_strip_crc) ? 0 :
1370 * Allocate RX ring hardware descriptors. A memzone large enough to
1371 * handle the maximum ring size is allocated in order to allow for
1372 * resizing in later calls to the queue setup function.
1374 size = sizeof(union e1000_adv_rx_desc) * IGB_MAX_RING_DESC;
1375 rz = ring_dma_zone_reserve(dev, "rx_ring", queue_idx, size, socket_id);
1377 igb_rx_queue_release(rxq);
1380 rxq->rdt_reg_addr = E1000_PCI_REG_ADDR(hw, E1000_RDT(rxq->reg_idx));
1381 rxq->rdh_reg_addr = E1000_PCI_REG_ADDR(hw, E1000_RDH(rxq->reg_idx));
1382 #ifndef RTE_LIBRTE_XEN_DOM0
1383 rxq->rx_ring_phys_addr = (uint64_t) rz->phys_addr;
1385 rxq->rx_ring_phys_addr = rte_mem_phy2mch(rz->memseg_id, rz->phys_addr);
1387 rxq->rx_ring = (union e1000_adv_rx_desc *) rz->addr;
1389 /* Allocate software ring. */
1390 rxq->sw_ring = rte_zmalloc("rxq->sw_ring",
1391 sizeof(struct igb_rx_entry) * nb_desc,
1393 if (rxq->sw_ring == NULL) {
1394 igb_rx_queue_release(rxq);
1397 PMD_INIT_LOG(DEBUG, "sw_ring=%p hw_ring=%p dma_addr=0x%"PRIx64"\n",
1398 rxq->sw_ring, rxq->rx_ring, rxq->rx_ring_phys_addr);
1400 dev->data->rx_queues[queue_idx] = rxq;
1401 igb_reset_rx_queue(rxq);
1407 eth_igb_rx_queue_count(struct rte_eth_dev *dev, uint16_t rx_queue_id)
1409 #define IGB_RXQ_SCAN_INTERVAL 4
1410 volatile union e1000_adv_rx_desc *rxdp;
1411 struct igb_rx_queue *rxq;
1414 if (rx_queue_id >= dev->data->nb_rx_queues) {
1415 PMD_RX_LOG(ERR, "Invalid RX queue id=%d\n", rx_queue_id);
1419 rxq = dev->data->rx_queues[rx_queue_id];
1420 rxdp = &(rxq->rx_ring[rxq->rx_tail]);
1422 while ((desc < rxq->nb_rx_desc) &&
1423 (rxdp->wb.upper.status_error & E1000_RXD_STAT_DD)) {
1424 desc += IGB_RXQ_SCAN_INTERVAL;
1425 rxdp += IGB_RXQ_SCAN_INTERVAL;
1426 if (rxq->rx_tail + desc >= rxq->nb_rx_desc)
1427 rxdp = &(rxq->rx_ring[rxq->rx_tail +
1428 desc - rxq->nb_rx_desc]);
1435 eth_igb_rx_descriptor_done(void *rx_queue, uint16_t offset)
1437 volatile union e1000_adv_rx_desc *rxdp;
1438 struct igb_rx_queue *rxq = rx_queue;
1441 if (unlikely(offset >= rxq->nb_rx_desc))
1443 desc = rxq->rx_tail + offset;
1444 if (desc >= rxq->nb_rx_desc)
1445 desc -= rxq->nb_rx_desc;
1447 rxdp = &rxq->rx_ring[desc];
1448 return !!(rxdp->wb.upper.status_error & E1000_RXD_STAT_DD);
1452 igb_dev_clear_queues(struct rte_eth_dev *dev)
1455 struct igb_tx_queue *txq;
1456 struct igb_rx_queue *rxq;
1458 for (i = 0; i < dev->data->nb_tx_queues; i++) {
1459 txq = dev->data->tx_queues[i];
1461 igb_tx_queue_release_mbufs(txq);
1462 igb_reset_tx_queue(txq, dev);
1466 for (i = 0; i < dev->data->nb_rx_queues; i++) {
1467 rxq = dev->data->rx_queues[i];
1469 igb_rx_queue_release_mbufs(rxq);
1470 igb_reset_rx_queue(rxq);
1476 * Receive Side Scaling (RSS).
1477 * See section 7.1.1.7 in the following document:
1478 * "Intel 82576 GbE Controller Datasheet" - Revision 2.45 October 2009
1481 * The source and destination IP addresses of the IP header and the source and
1482 * destination ports of TCP/UDP headers, if any, of received packets are hashed
1483 * against a configurable random key to compute a 32-bit RSS hash result.
1484 * The seven (7) LSBs of the 32-bit hash result are used as an index into a
1485 * 128-entry redirection table (RETA). Each entry of the RETA provides a 3-bit
1486 * RSS output index which is used as the RX queue index where to store the
1488 * The following output is supplied in the RX write-back descriptor:
1489 * - 32-bit result of the Microsoft RSS hash function,
1490 * - 4-bit RSS type field.
1494 * RSS random key supplied in section 7.1.1.7.3 of the Intel 82576 datasheet.
1495 * Used as the default key.
1497 static uint8_t rss_intel_key[40] = {
1498 0x6D, 0x5A, 0x56, 0xDA, 0x25, 0x5B, 0x0E, 0xC2,
1499 0x41, 0x67, 0x25, 0x3D, 0x43, 0xA3, 0x8F, 0xB0,
1500 0xD0, 0xCA, 0x2B, 0xCB, 0xAE, 0x7B, 0x30, 0xB4,
1501 0x77, 0xCB, 0x2D, 0xA3, 0x80, 0x30, 0xF2, 0x0C,
1502 0x6A, 0x42, 0xB7, 0x3B, 0xBE, 0xAC, 0x01, 0xFA,
1506 igb_rss_disable(struct rte_eth_dev *dev)
1508 struct e1000_hw *hw;
1511 hw = E1000_DEV_PRIVATE_TO_HW(dev->data->dev_private);
1512 mrqc = E1000_READ_REG(hw, E1000_MRQC);
1513 mrqc &= ~E1000_MRQC_ENABLE_MASK;
1514 E1000_WRITE_REG(hw, E1000_MRQC, mrqc);
1518 igb_rss_configure(struct rte_eth_dev *dev)
1520 struct e1000_hw *hw;
1528 hw = E1000_DEV_PRIVATE_TO_HW(dev->data->dev_private);
1530 rss_hf = dev->data->dev_conf.rx_adv_conf.rss_conf.rss_hf;
1531 if (rss_hf == 0) /* Disable RSS. */ {
1532 igb_rss_disable(dev);
1535 hash_key = dev->data->dev_conf.rx_adv_conf.rss_conf.rss_key;
1536 if (hash_key == NULL)
1537 hash_key = rss_intel_key; /* Default hash key. */
1539 /* Fill in RSS hash key. */
1540 for (i = 0; i < 10; i++) {
1541 rss_key = hash_key[(i * 4)];
1542 rss_key |= hash_key[(i * 4) + 1] << 8;
1543 rss_key |= hash_key[(i * 4) + 2] << 16;
1544 rss_key |= hash_key[(i * 4) + 3] << 24;
1545 E1000_WRITE_REG_ARRAY(hw, E1000_RSSRK(0), i, rss_key);
1548 /* Fill in redirection table. */
1549 shift = (hw->mac.type == e1000_82575) ? 6 : 0;
1550 for (i = 0; i < 128; i++) {
1557 q_idx = (uint8_t) ((dev->data->nb_rx_queues > 1) ?
1558 i % dev->data->nb_rx_queues : 0);
1559 reta.bytes[i & 3] = (uint8_t) (q_idx << shift);
1561 E1000_WRITE_REG(hw, E1000_RETA(i >> 2), reta.dword);
1564 /* Set configured hashing functions in MRQC register. */
1565 mrqc = E1000_MRQC_ENABLE_RSS_4Q; /* RSS enabled. */
1566 if (rss_hf & ETH_RSS_IPV4)
1567 mrqc |= E1000_MRQC_RSS_FIELD_IPV4;
1568 if (rss_hf & ETH_RSS_IPV4_TCP)
1569 mrqc |= E1000_MRQC_RSS_FIELD_IPV4_TCP;
1570 if (rss_hf & ETH_RSS_IPV6)
1571 mrqc |= E1000_MRQC_RSS_FIELD_IPV6;
1572 if (rss_hf & ETH_RSS_IPV6_EX)
1573 mrqc |= E1000_MRQC_RSS_FIELD_IPV6_EX;
1574 if (rss_hf & ETH_RSS_IPV6_TCP)
1575 mrqc |= E1000_MRQC_RSS_FIELD_IPV6_TCP;
1576 if (rss_hf & ETH_RSS_IPV6_TCP_EX)
1577 mrqc |= E1000_MRQC_RSS_FIELD_IPV6_TCP_EX;
1578 if (rss_hf & ETH_RSS_IPV4_UDP)
1579 mrqc |= E1000_MRQC_RSS_FIELD_IPV4_UDP;
1580 if (rss_hf & ETH_RSS_IPV6_UDP)
1581 mrqc |= E1000_MRQC_RSS_FIELD_IPV6_UDP;
1582 if (rss_hf & ETH_RSS_IPV6_UDP_EX)
1583 mrqc |= E1000_MRQC_RSS_FIELD_IPV6_UDP_EX;
1584 E1000_WRITE_REG(hw, E1000_MRQC, mrqc);
1588 * Check if the mac type support VMDq or not.
1589 * Return 1 if it supports, otherwise, return 0.
1592 igb_is_vmdq_supported(const struct rte_eth_dev *dev)
1594 const struct e1000_hw *hw = E1000_DEV_PRIVATE_TO_HW(dev->data->dev_private);
1596 switch (hw->mac.type) {
1617 PMD_INIT_LOG(ERR, "Cannot support VMDq feature\n");
1623 igb_vmdq_rx_hw_configure(struct rte_eth_dev *dev)
1625 struct rte_eth_vmdq_rx_conf *cfg;
1626 struct e1000_hw *hw;
1627 uint32_t mrqc, vt_ctl, vmolr, rctl;
1630 PMD_INIT_LOG(DEBUG, ">>");
1631 hw = E1000_DEV_PRIVATE_TO_HW(dev->data->dev_private);
1632 cfg = &dev->data->dev_conf.rx_adv_conf.vmdq_rx_conf;
1634 /* Check if mac type can support VMDq, return value of 0 means NOT support */
1635 if (igb_is_vmdq_supported(dev) == 0)
1638 igb_rss_disable(dev);
1640 /* RCTL: eanble VLAN filter */
1641 rctl = E1000_READ_REG(hw, E1000_RCTL);
1642 rctl |= E1000_RCTL_VFE;
1643 E1000_WRITE_REG(hw, E1000_RCTL, rctl);
1645 /* MRQC: enable vmdq */
1646 mrqc = E1000_READ_REG(hw, E1000_MRQC);
1647 mrqc |= E1000_MRQC_ENABLE_VMDQ;
1648 E1000_WRITE_REG(hw, E1000_MRQC, mrqc);
1650 /* VTCTL: pool selection according to VLAN tag */
1651 vt_ctl = E1000_READ_REG(hw, E1000_VT_CTL);
1652 if (cfg->enable_default_pool)
1653 vt_ctl |= (cfg->default_pool << E1000_VT_CTL_DEFAULT_POOL_SHIFT);
1654 vt_ctl |= E1000_VT_CTL_IGNORE_MAC;
1655 E1000_WRITE_REG(hw, E1000_VT_CTL, vt_ctl);
1658 * VMOLR: set STRVLAN as 1 if IGMAC in VTCTL is set as 1
1659 * Both 82576 and 82580 support it
1661 if (hw->mac.type != e1000_i350) {
1662 for (i = 0; i < E1000_VMOLR_SIZE; i++) {
1663 vmolr = E1000_READ_REG(hw, E1000_VMOLR(i));
1664 vmolr |= E1000_VMOLR_STRVLAN;
1665 E1000_WRITE_REG(hw, E1000_VMOLR(i), vmolr);
1669 /* VFTA - enable all vlan filters */
1670 for (i = 0; i < IGB_VFTA_SIZE; i++)
1671 E1000_WRITE_REG(hw, (E1000_VFTA+(i*4)), UINT32_MAX);
1673 /* VFRE: 8 pools enabling for rx, both 82576 and i350 support it */
1674 if (hw->mac.type != e1000_82580)
1675 E1000_WRITE_REG(hw, E1000_VFRE, E1000_MBVFICR_VFREQ_MASK);
1678 * RAH/RAL - allow pools to read specific mac addresses
1679 * In this case, all pools should be able to read from mac addr 0
1681 E1000_WRITE_REG(hw, E1000_RAH(0), (E1000_RAH_AV | UINT16_MAX));
1682 E1000_WRITE_REG(hw, E1000_RAL(0), UINT32_MAX);
1684 /* VLVF: set up filters for vlan tags as configured */
1685 for (i = 0; i < cfg->nb_pool_maps; i++) {
1686 /* set vlan id in VF register and set the valid bit */
1687 E1000_WRITE_REG(hw, E1000_VLVF(i), (E1000_VLVF_VLANID_ENABLE | \
1688 (cfg->pool_map[i].vlan_id & ETH_VLAN_ID_MAX) | \
1689 ((cfg->pool_map[i].pools << E1000_VLVF_POOLSEL_SHIFT ) & \
1690 E1000_VLVF_POOLSEL_MASK)));
1693 E1000_WRITE_FLUSH(hw);
1699 /*********************************************************************
1701 * Enable receive unit.
1703 **********************************************************************/
1706 igb_alloc_rx_queue_mbufs(struct igb_rx_queue *rxq)
1708 struct igb_rx_entry *rxe = rxq->sw_ring;
1712 /* Initialize software ring entries. */
1713 for (i = 0; i < rxq->nb_rx_desc; i++) {
1714 volatile union e1000_adv_rx_desc *rxd;
1715 struct rte_mbuf *mbuf = rte_rxmbuf_alloc(rxq->mb_pool);
1718 PMD_INIT_LOG(ERR, "RX mbuf alloc failed "
1719 "queue_id=%hu\n", rxq->queue_id);
1720 igb_rx_queue_release(rxq);
1724 rte_cpu_to_le_64(RTE_MBUF_DATA_DMA_ADDR_DEFAULT(mbuf));
1725 rxd = &rxq->rx_ring[i];
1726 rxd->read.hdr_addr = dma_addr;
1727 rxd->read.pkt_addr = dma_addr;
1734 #define E1000_MRQC_DEF_Q_SHIFT (3)
1736 igb_dev_mq_rx_configure(struct rte_eth_dev *dev)
1738 struct e1000_hw *hw =
1739 E1000_DEV_PRIVATE_TO_HW(dev->data->dev_private);
1742 if (RTE_ETH_DEV_SRIOV(dev).active == ETH_8_POOLS) {
1744 * SRIOV active scheme
1745 * FIXME if support RSS together with VMDq & SRIOV
1747 mrqc = E1000_MRQC_ENABLE_VMDQ;
1748 /* 011b Def_Q ignore, according to VT_CTL.DEF_PL */
1749 mrqc |= 0x3 << E1000_MRQC_DEF_Q_SHIFT;
1750 E1000_WRITE_REG(hw, E1000_MRQC, mrqc);
1751 } else if(RTE_ETH_DEV_SRIOV(dev).active == 0) {
1753 * SRIOV inactive scheme
1755 switch (dev->data->dev_conf.rxmode.mq_mode) {
1757 igb_rss_configure(dev);
1759 case ETH_MQ_RX_VMDQ_ONLY:
1760 /*Configure general VMDQ only RX parameters*/
1761 igb_vmdq_rx_hw_configure(dev);
1763 case ETH_MQ_RX_NONE:
1764 /* if mq_mode is none, disable rss mode.*/
1766 igb_rss_disable(dev);
1775 eth_igb_rx_init(struct rte_eth_dev *dev)
1777 struct e1000_hw *hw;
1778 struct igb_rx_queue *rxq;
1779 struct rte_pktmbuf_pool_private *mbp_priv;
1784 uint16_t rctl_bsize;
1788 hw = E1000_DEV_PRIVATE_TO_HW(dev->data->dev_private);
1792 * Make sure receives are disabled while setting
1793 * up the descriptor ring.
1795 rctl = E1000_READ_REG(hw, E1000_RCTL);
1796 E1000_WRITE_REG(hw, E1000_RCTL, rctl & ~E1000_RCTL_EN);
1799 * Configure support of jumbo frames, if any.
1801 if (dev->data->dev_conf.rxmode.jumbo_frame == 1) {
1802 rctl |= E1000_RCTL_LPE;
1805 * Set maximum packet length by default, and might be updated
1806 * together with enabling/disabling dual VLAN.
1808 E1000_WRITE_REG(hw, E1000_RLPML,
1809 dev->data->dev_conf.rxmode.max_rx_pkt_len +
1812 rctl &= ~E1000_RCTL_LPE;
1814 /* Configure and enable each RX queue. */
1816 dev->rx_pkt_burst = eth_igb_recv_pkts;
1817 for (i = 0; i < dev->data->nb_rx_queues; i++) {
1821 rxq = dev->data->rx_queues[i];
1823 /* Allocate buffers for descriptor rings and set up queue */
1824 ret = igb_alloc_rx_queue_mbufs(rxq);
1829 * Reset crc_len in case it was changed after queue setup by a
1833 (uint8_t)(dev->data->dev_conf.rxmode.hw_strip_crc ?
1836 bus_addr = rxq->rx_ring_phys_addr;
1837 E1000_WRITE_REG(hw, E1000_RDLEN(rxq->reg_idx),
1839 sizeof(union e1000_adv_rx_desc));
1840 E1000_WRITE_REG(hw, E1000_RDBAH(rxq->reg_idx),
1841 (uint32_t)(bus_addr >> 32));
1842 E1000_WRITE_REG(hw, E1000_RDBAL(rxq->reg_idx), (uint32_t)bus_addr);
1844 srrctl = E1000_SRRCTL_DESCTYPE_ADV_ONEBUF;
1847 * Configure RX buffer size.
1849 mbp_priv = rte_mempool_get_priv(rxq->mb_pool);
1850 buf_size = (uint16_t) (mbp_priv->mbuf_data_room_size -
1851 RTE_PKTMBUF_HEADROOM);
1852 if (buf_size >= 1024) {
1854 * Configure the BSIZEPACKET field of the SRRCTL
1855 * register of the queue.
1856 * Value is in 1 KB resolution, from 1 KB to 127 KB.
1857 * If this field is equal to 0b, then RCTL.BSIZE
1858 * determines the RX packet buffer size.
1860 srrctl |= ((buf_size >> E1000_SRRCTL_BSIZEPKT_SHIFT) &
1861 E1000_SRRCTL_BSIZEPKT_MASK);
1862 buf_size = (uint16_t) ((srrctl &
1863 E1000_SRRCTL_BSIZEPKT_MASK) <<
1864 E1000_SRRCTL_BSIZEPKT_SHIFT);
1866 /* It adds dual VLAN length for supporting dual VLAN */
1867 if ((dev->data->dev_conf.rxmode.max_rx_pkt_len +
1868 2 * VLAN_TAG_SIZE) > buf_size){
1869 dev->rx_pkt_burst = eth_igb_recv_scattered_pkts;
1870 dev->data->scattered_rx = 1;
1874 * Use BSIZE field of the device RCTL register.
1876 if ((rctl_bsize == 0) || (rctl_bsize > buf_size))
1877 rctl_bsize = buf_size;
1878 dev->rx_pkt_burst = eth_igb_recv_scattered_pkts;
1879 dev->data->scattered_rx = 1;
1882 /* Set if packets are dropped when no descriptors available */
1884 srrctl |= E1000_SRRCTL_DROP_EN;
1886 E1000_WRITE_REG(hw, E1000_SRRCTL(rxq->reg_idx), srrctl);
1888 /* Enable this RX queue. */
1889 rxdctl = E1000_READ_REG(hw, E1000_RXDCTL(rxq->reg_idx));
1890 rxdctl |= E1000_RXDCTL_QUEUE_ENABLE;
1891 rxdctl &= 0xFFF00000;
1892 rxdctl |= (rxq->pthresh & 0x1F);
1893 rxdctl |= ((rxq->hthresh & 0x1F) << 8);
1894 rxdctl |= ((rxq->wthresh & 0x1F) << 16);
1895 E1000_WRITE_REG(hw, E1000_RXDCTL(rxq->reg_idx), rxdctl);
1899 * Setup BSIZE field of RCTL register, if needed.
1900 * Buffer sizes >= 1024 are not [supposed to be] setup in the RCTL
1901 * register, since the code above configures the SRRCTL register of
1902 * the RX queue in such a case.
1903 * All configurable sizes are:
1904 * 16384: rctl |= (E1000_RCTL_SZ_16384 | E1000_RCTL_BSEX);
1905 * 8192: rctl |= (E1000_RCTL_SZ_8192 | E1000_RCTL_BSEX);
1906 * 4096: rctl |= (E1000_RCTL_SZ_4096 | E1000_RCTL_BSEX);
1907 * 2048: rctl |= E1000_RCTL_SZ_2048;
1908 * 1024: rctl |= E1000_RCTL_SZ_1024;
1909 * 512: rctl |= E1000_RCTL_SZ_512;
1910 * 256: rctl |= E1000_RCTL_SZ_256;
1912 if (rctl_bsize > 0) {
1913 if (rctl_bsize >= 512) /* 512 <= buf_size < 1024 - use 512 */
1914 rctl |= E1000_RCTL_SZ_512;
1915 else /* 256 <= buf_size < 512 - use 256 */
1916 rctl |= E1000_RCTL_SZ_256;
1920 * Configure RSS if device configured with multiple RX queues.
1922 igb_dev_mq_rx_configure(dev);
1924 /* Update the rctl since igb_dev_mq_rx_configure may change its value */
1925 rctl |= E1000_READ_REG(hw, E1000_RCTL);
1928 * Setup the Checksum Register.
1929 * Receive Full-Packet Checksum Offload is mutually exclusive with RSS.
1931 rxcsum = E1000_READ_REG(hw, E1000_RXCSUM);
1932 rxcsum |= E1000_RXCSUM_PCSD;
1934 /* Enable both L3/L4 rx checksum offload */
1935 if (dev->data->dev_conf.rxmode.hw_ip_checksum)
1936 rxcsum |= (E1000_RXCSUM_IPOFL | E1000_RXCSUM_TUOFL);
1938 rxcsum &= ~(E1000_RXCSUM_IPOFL | E1000_RXCSUM_TUOFL);
1939 E1000_WRITE_REG(hw, E1000_RXCSUM, rxcsum);
1941 /* Setup the Receive Control Register. */
1942 if (dev->data->dev_conf.rxmode.hw_strip_crc) {
1943 rctl |= E1000_RCTL_SECRC; /* Strip Ethernet CRC. */
1945 /* set STRCRC bit in all queues */
1946 if (hw->mac.type == e1000_i350 ||
1947 hw->mac.type == e1000_i210 ||
1948 hw->mac.type == e1000_i211 ||
1949 hw->mac.type == e1000_i354) {
1950 for (i = 0; i < dev->data->nb_rx_queues; i++) {
1951 rxq = dev->data->rx_queues[i];
1952 uint32_t dvmolr = E1000_READ_REG(hw,
1953 E1000_DVMOLR(rxq->reg_idx));
1954 dvmolr |= E1000_DVMOLR_STRCRC;
1955 E1000_WRITE_REG(hw, E1000_DVMOLR(rxq->reg_idx), dvmolr);
1959 rctl &= ~E1000_RCTL_SECRC; /* Do not Strip Ethernet CRC. */
1961 /* clear STRCRC bit in all queues */
1962 if (hw->mac.type == e1000_i350 ||
1963 hw->mac.type == e1000_i210 ||
1964 hw->mac.type == e1000_i211 ||
1965 hw->mac.type == e1000_i354) {
1966 for (i = 0; i < dev->data->nb_rx_queues; i++) {
1967 rxq = dev->data->rx_queues[i];
1968 uint32_t dvmolr = E1000_READ_REG(hw,
1969 E1000_DVMOLR(rxq->reg_idx));
1970 dvmolr &= ~E1000_DVMOLR_STRCRC;
1971 E1000_WRITE_REG(hw, E1000_DVMOLR(rxq->reg_idx), dvmolr);
1976 rctl &= ~(3 << E1000_RCTL_MO_SHIFT);
1977 rctl |= E1000_RCTL_EN | E1000_RCTL_BAM | E1000_RCTL_LBM_NO |
1978 E1000_RCTL_RDMTS_HALF |
1979 (hw->mac.mc_filter_type << E1000_RCTL_MO_SHIFT);
1981 /* Make sure VLAN Filters are off. */
1982 if (dev->data->dev_conf.rxmode.mq_mode != ETH_MQ_RX_VMDQ_ONLY)
1983 rctl &= ~E1000_RCTL_VFE;
1984 /* Don't store bad packets. */
1985 rctl &= ~E1000_RCTL_SBP;
1987 /* Enable Receives. */
1988 E1000_WRITE_REG(hw, E1000_RCTL, rctl);
1991 * Setup the HW Rx Head and Tail Descriptor Pointers.
1992 * This needs to be done after enable.
1994 for (i = 0; i < dev->data->nb_rx_queues; i++) {
1995 rxq = dev->data->rx_queues[i];
1996 E1000_WRITE_REG(hw, E1000_RDH(rxq->reg_idx), 0);
1997 E1000_WRITE_REG(hw, E1000_RDT(rxq->reg_idx), rxq->nb_rx_desc - 1);
2003 /*********************************************************************
2005 * Enable transmit unit.
2007 **********************************************************************/
2009 eth_igb_tx_init(struct rte_eth_dev *dev)
2011 struct e1000_hw *hw;
2012 struct igb_tx_queue *txq;
2017 hw = E1000_DEV_PRIVATE_TO_HW(dev->data->dev_private);
2019 /* Setup the Base and Length of the Tx Descriptor Rings. */
2020 for (i = 0; i < dev->data->nb_tx_queues; i++) {
2022 txq = dev->data->tx_queues[i];
2023 bus_addr = txq->tx_ring_phys_addr;
2025 E1000_WRITE_REG(hw, E1000_TDLEN(txq->reg_idx),
2027 sizeof(union e1000_adv_tx_desc));
2028 E1000_WRITE_REG(hw, E1000_TDBAH(txq->reg_idx),
2029 (uint32_t)(bus_addr >> 32));
2030 E1000_WRITE_REG(hw, E1000_TDBAL(txq->reg_idx), (uint32_t)bus_addr);
2032 /* Setup the HW Tx Head and Tail descriptor pointers. */
2033 E1000_WRITE_REG(hw, E1000_TDT(txq->reg_idx), 0);
2034 E1000_WRITE_REG(hw, E1000_TDH(txq->reg_idx), 0);
2036 /* Setup Transmit threshold registers. */
2037 txdctl = E1000_READ_REG(hw, E1000_TXDCTL(txq->reg_idx));
2038 txdctl |= txq->pthresh & 0x1F;
2039 txdctl |= ((txq->hthresh & 0x1F) << 8);
2040 txdctl |= ((txq->wthresh & 0x1F) << 16);
2041 txdctl |= E1000_TXDCTL_QUEUE_ENABLE;
2042 E1000_WRITE_REG(hw, E1000_TXDCTL(txq->reg_idx), txdctl);
2045 /* Program the Transmit Control Register. */
2046 tctl = E1000_READ_REG(hw, E1000_TCTL);
2047 tctl &= ~E1000_TCTL_CT;
2048 tctl |= (E1000_TCTL_PSP | E1000_TCTL_RTLC | E1000_TCTL_EN |
2049 (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT));
2051 e1000_config_collision_dist(hw);
2053 /* This write will effectively turn on the transmit unit. */
2054 E1000_WRITE_REG(hw, E1000_TCTL, tctl);
2057 /*********************************************************************
2059 * Enable VF receive unit.
2061 **********************************************************************/
2063 eth_igbvf_rx_init(struct rte_eth_dev *dev)
2065 struct e1000_hw *hw;
2066 struct igb_rx_queue *rxq;
2067 struct rte_pktmbuf_pool_private *mbp_priv;
2070 uint16_t rctl_bsize;
2074 hw = E1000_DEV_PRIVATE_TO_HW(dev->data->dev_private);
2076 /* Configure and enable each RX queue. */
2078 dev->rx_pkt_burst = eth_igb_recv_pkts;
2079 for (i = 0; i < dev->data->nb_rx_queues; i++) {
2083 rxq = dev->data->rx_queues[i];
2085 /* Allocate buffers for descriptor rings and set up queue */
2086 ret = igb_alloc_rx_queue_mbufs(rxq);
2090 bus_addr = rxq->rx_ring_phys_addr;
2091 E1000_WRITE_REG(hw, E1000_RDLEN(i),
2093 sizeof(union e1000_adv_rx_desc));
2094 E1000_WRITE_REG(hw, E1000_RDBAH(i),
2095 (uint32_t)(bus_addr >> 32));
2096 E1000_WRITE_REG(hw, E1000_RDBAL(i), (uint32_t)bus_addr);
2098 srrctl = E1000_SRRCTL_DESCTYPE_ADV_ONEBUF;
2101 * Configure RX buffer size.
2103 mbp_priv = rte_mempool_get_priv(rxq->mb_pool);
2104 buf_size = (uint16_t) (mbp_priv->mbuf_data_room_size -
2105 RTE_PKTMBUF_HEADROOM);
2106 if (buf_size >= 1024) {
2108 * Configure the BSIZEPACKET field of the SRRCTL
2109 * register of the queue.
2110 * Value is in 1 KB resolution, from 1 KB to 127 KB.
2111 * If this field is equal to 0b, then RCTL.BSIZE
2112 * determines the RX packet buffer size.
2114 srrctl |= ((buf_size >> E1000_SRRCTL_BSIZEPKT_SHIFT) &
2115 E1000_SRRCTL_BSIZEPKT_MASK);
2116 buf_size = (uint16_t) ((srrctl &
2117 E1000_SRRCTL_BSIZEPKT_MASK) <<
2118 E1000_SRRCTL_BSIZEPKT_SHIFT);
2120 /* It adds dual VLAN length for supporting dual VLAN */
2121 if ((dev->data->dev_conf.rxmode.max_rx_pkt_len +
2122 2 * VLAN_TAG_SIZE) > buf_size){
2123 dev->rx_pkt_burst = eth_igb_recv_scattered_pkts;
2124 dev->data->scattered_rx = 1;
2128 * Use BSIZE field of the device RCTL register.
2130 if ((rctl_bsize == 0) || (rctl_bsize > buf_size))
2131 rctl_bsize = buf_size;
2132 dev->rx_pkt_burst = eth_igb_recv_scattered_pkts;
2133 dev->data->scattered_rx = 1;
2136 /* Set if packets are dropped when no descriptors available */
2138 srrctl |= E1000_SRRCTL_DROP_EN;
2140 E1000_WRITE_REG(hw, E1000_SRRCTL(i), srrctl);
2142 /* Enable this RX queue. */
2143 rxdctl = E1000_READ_REG(hw, E1000_RXDCTL(i));
2144 rxdctl |= E1000_RXDCTL_QUEUE_ENABLE;
2145 rxdctl &= 0xFFF00000;
2146 rxdctl |= (rxq->pthresh & 0x1F);
2147 rxdctl |= ((rxq->hthresh & 0x1F) << 8);
2148 if (hw->mac.type == e1000_82576) {
2150 * Workaround of 82576 VF Erratum
2151 * force set WTHRESH to 1
2152 * to avoid Write-Back not triggered sometimes
2155 PMD_INIT_LOG(DEBUG, "Force set RX WTHRESH to 1 !\n");
2158 rxdctl |= ((rxq->wthresh & 0x1F) << 16);
2159 E1000_WRITE_REG(hw, E1000_RXDCTL(i), rxdctl);
2163 * Setup the HW Rx Head and Tail Descriptor Pointers.
2164 * This needs to be done after enable.
2166 for (i = 0; i < dev->data->nb_rx_queues; i++) {
2167 rxq = dev->data->rx_queues[i];
2168 E1000_WRITE_REG(hw, E1000_RDH(i), 0);
2169 E1000_WRITE_REG(hw, E1000_RDT(i), rxq->nb_rx_desc - 1);
2175 /*********************************************************************
2177 * Enable VF transmit unit.
2179 **********************************************************************/
2181 eth_igbvf_tx_init(struct rte_eth_dev *dev)
2183 struct e1000_hw *hw;
2184 struct igb_tx_queue *txq;
2188 hw = E1000_DEV_PRIVATE_TO_HW(dev->data->dev_private);
2190 /* Setup the Base and Length of the Tx Descriptor Rings. */
2191 for (i = 0; i < dev->data->nb_tx_queues; i++) {
2194 txq = dev->data->tx_queues[i];
2195 bus_addr = txq->tx_ring_phys_addr;
2196 E1000_WRITE_REG(hw, E1000_TDLEN(i),
2198 sizeof(union e1000_adv_tx_desc));
2199 E1000_WRITE_REG(hw, E1000_TDBAH(i),
2200 (uint32_t)(bus_addr >> 32));
2201 E1000_WRITE_REG(hw, E1000_TDBAL(i), (uint32_t)bus_addr);
2203 /* Setup the HW Tx Head and Tail descriptor pointers. */
2204 E1000_WRITE_REG(hw, E1000_TDT(i), 0);
2205 E1000_WRITE_REG(hw, E1000_TDH(i), 0);
2207 /* Setup Transmit threshold registers. */
2208 txdctl = E1000_READ_REG(hw, E1000_TXDCTL(i));
2209 txdctl |= txq->pthresh & 0x1F;
2210 txdctl |= ((txq->hthresh & 0x1F) << 8);
2211 if (hw->mac.type == e1000_82576) {
2213 * Workaround of 82576 VF Erratum
2214 * force set WTHRESH to 1
2215 * to avoid Write-Back not triggered sometimes
2218 PMD_INIT_LOG(DEBUG, "Force set TX WTHRESH to 1 !\n");
2221 txdctl |= ((txq->wthresh & 0x1F) << 16);
2222 txdctl |= E1000_TXDCTL_QUEUE_ENABLE;
2223 E1000_WRITE_REG(hw, E1000_TXDCTL(i), txdctl);