* Buffer.
* @param length
* Packet length.
- * @param lkey
- * Memory region lkey.
+ *
+ * @return ds
+ * Number of DS elements consumed.
*/
-static inline void
+static inline unsigned int
mlx5_wqe_write(struct txq *txq, volatile union mlx5_wqe *wqe,
- struct rte_mbuf *buf, uint32_t length, uint32_t lkey)
+ struct rte_mbuf *buf, uint32_t length)
{
+ uintptr_t raw = (uintptr_t)&wqe->wqe.eseg.inline_hdr_start;
+ uint16_t ds;
+ uint16_t pkt_inline_sz = 16;
uintptr_t addr = rte_pktmbuf_mtod(buf, uintptr_t);
+ struct mlx5_wqe_data_seg *dseg = NULL;
- rte_mov16((uint8_t *)&wqe->wqe.eseg.inline_hdr_start,
- (uint8_t *)addr);
- addr += 16;
+ assert(length >= 16);
+ /* Start the know and common part of the WQE structure. */
+ wqe->wqe.ctrl.data[0] = htonl((txq->wqe_ci << 8) | MLX5_OPCODE_SEND);
+ wqe->wqe.ctrl.data[2] = 0;
+ wqe->wqe.ctrl.data[3] = 0;
+ wqe->wqe.eseg.rsvd0 = 0;
+ wqe->wqe.eseg.rsvd1 = 0;
+ wqe->wqe.eseg.mss = 0;
+ wqe->wqe.eseg.rsvd2 = 0;
+ /* Start by copying the Ethernet Header. */
+ rte_mov16((uint8_t *)raw, (uint8_t *)addr);
length -= 16;
- /* Need to insert VLAN ? */
+ addr += 16;
+ /* Replace the Ethernet type by the VLAN if necessary. */
if (buf->ol_flags & PKT_TX_VLAN_PKT) {
uint32_t vlan = htonl(0x81000000 | buf->vlan_tci);
- memcpy((uint8_t *)&wqe->wqe.eseg.inline_hdr_start + 12,
+ memcpy((uint8_t *)(raw + 16 - sizeof(vlan)),
&vlan, sizeof(vlan));
addr -= sizeof(vlan);
length += sizeof(vlan);
}
- /* Write the WQE. */
- wqe->wqe.ctrl.data[0] = htonl((txq->wqe_ci << 8) | MLX5_OPCODE_SEND);
- wqe->wqe.ctrl.data[1] = htonl((txq->qp_num_8s) | 4);
- wqe->wqe.ctrl.data[2] = 0;
- wqe->wqe.ctrl.data[3] = 0;
- wqe->inl.eseg.rsvd0 = 0;
- wqe->inl.eseg.rsvd1 = 0;
- wqe->inl.eseg.mss = 0;
- wqe->inl.eseg.rsvd2 = 0;
- wqe->wqe.eseg.inline_hdr_sz = htons(16);
- /* Store remaining data in data segment. */
- wqe->wqe.dseg.byte_count = htonl(length);
- wqe->wqe.dseg.lkey = lkey;
- wqe->wqe.dseg.addr = htonll(addr);
- /* Increment consumer index. */
- ++txq->wqe_ci;
-}
-
-/**
- * Write a inline WQE.
- *
- * @param txq
- * Pointer to TX queue structure.
- * @param wqe
- * Pointer to the WQE to fill.
- * @param addr
- * Buffer data address.
- * @param length
- * Packet length.
- * @param lkey
- * Memory region lkey.
- */
-static inline void
-mlx5_wqe_write_inline(struct txq *txq, volatile union mlx5_wqe *wqe,
- uintptr_t addr, uint32_t length)
-{
- uint32_t size;
- uint16_t wqe_cnt = txq->wqe_n - 1;
- uint16_t wqe_ci = txq->wqe_ci + 1;
-
- /* Copy the first 16 bytes into inline header. */
- rte_memcpy((void *)(uintptr_t)wqe->inl.eseg.inline_hdr_start,
- (void *)(uintptr_t)addr,
- MLX5_ETH_INLINE_HEADER_SIZE);
- addr += MLX5_ETH_INLINE_HEADER_SIZE;
- length -= MLX5_ETH_INLINE_HEADER_SIZE;
- size = 3 + ((4 + length + 15) / 16);
- wqe->inl.byte_cnt = htonl(length | MLX5_INLINE_SEG);
- rte_memcpy((void *)(uintptr_t)&wqe->inl.data[0],
- (void *)addr, MLX5_WQE64_INL_DATA);
- addr += MLX5_WQE64_INL_DATA;
- length -= MLX5_WQE64_INL_DATA;
- while (length) {
- volatile union mlx5_wqe *wqe_next =
- &(*txq->wqes)[wqe_ci & wqe_cnt];
- uint32_t copy_bytes = (length > sizeof(*wqe)) ?
- sizeof(*wqe) :
- length;
-
- rte_mov64((uint8_t *)(uintptr_t)&wqe_next->data[0],
- (uint8_t *)addr);
- addr += copy_bytes;
- length -= copy_bytes;
- ++wqe_ci;
- }
- assert(size < 64);
- wqe->inl.ctrl.data[0] = htonl((txq->wqe_ci << 8) | MLX5_OPCODE_SEND);
- wqe->inl.ctrl.data[1] = htonl(txq->qp_num_8s | size);
- wqe->inl.ctrl.data[2] = 0;
- wqe->inl.ctrl.data[3] = 0;
- wqe->inl.eseg.rsvd0 = 0;
- wqe->inl.eseg.rsvd1 = 0;
- wqe->inl.eseg.mss = 0;
- wqe->inl.eseg.rsvd2 = 0;
- wqe->inl.eseg.inline_hdr_sz = htons(MLX5_ETH_INLINE_HEADER_SIZE);
- /* Increment consumer index. */
- txq->wqe_ci = wqe_ci;
-}
-
-/**
- * Write a inline WQE with VLAN.
- *
- * @param txq
- * Pointer to TX queue structure.
- * @param wqe
- * Pointer to the WQE to fill.
- * @param addr
- * Buffer data address.
- * @param length
- * Packet length.
- * @param lkey
- * Memory region lkey.
- * @param vlan_tci
- * VLAN field to insert in packet.
- */
-static inline void
-mlx5_wqe_write_inline_vlan(struct txq *txq, volatile union mlx5_wqe *wqe,
- uintptr_t addr, uint32_t length, uint16_t vlan_tci)
-{
- uint32_t size;
- uint32_t wqe_cnt = txq->wqe_n - 1;
- uint16_t wqe_ci = txq->wqe_ci + 1;
- uint32_t vlan = htonl(0x81000000 | vlan_tci);
-
- /*
- * Copy 12 bytes of source & destination MAC address.
- * Copy 4 bytes of VLAN.
- * Copy 2 bytes of Ether type.
- */
- rte_memcpy((uint8_t *)(uintptr_t)wqe->inl.eseg.inline_hdr_start,
- (uint8_t *)addr, 12);
- rte_memcpy((uint8_t *)(uintptr_t)wqe->inl.eseg.inline_hdr_start + 12,
- &vlan, sizeof(vlan));
- rte_memcpy((uint8_t *)((uintptr_t)wqe->inl.eseg.inline_hdr_start + 16),
- (uint8_t *)(addr + 12), 2);
- addr += MLX5_ETH_VLAN_INLINE_HEADER_SIZE - sizeof(vlan);
- length -= MLX5_ETH_VLAN_INLINE_HEADER_SIZE - sizeof(vlan);
- size = (sizeof(wqe->inl.ctrl.ctrl) +
- sizeof(wqe->inl.eseg) +
- sizeof(wqe->inl.byte_cnt) +
- length + 15) / 16;
- wqe->inl.byte_cnt = htonl(length | MLX5_INLINE_SEG);
- rte_memcpy((void *)(uintptr_t)&wqe->inl.data[0],
- (void *)addr, MLX5_WQE64_INL_DATA);
- addr += MLX5_WQE64_INL_DATA;
- length -= MLX5_WQE64_INL_DATA;
- while (length) {
- volatile union mlx5_wqe *wqe_next =
- &(*txq->wqes)[wqe_ci & wqe_cnt];
- uint32_t copy_bytes = (length > sizeof(*wqe)) ?
- sizeof(*wqe) :
- length;
-
- rte_mov64((uint8_t *)(uintptr_t)&wqe_next->data[0],
- (uint8_t *)addr);
- addr += copy_bytes;
- length -= copy_bytes;
- ++wqe_ci;
+ /* Inline if enough room. */
+ if (txq->max_inline != 0) {
+ uintptr_t end = (uintptr_t)&(*txq->wqes)[txq->wqe_n];
+ uint16_t max_inline = txq->max_inline * RTE_CACHE_LINE_SIZE;
+ uint16_t room;
+
+ raw += 16;
+ room = end - (uintptr_t)raw;
+ if (room > max_inline) {
+ uintptr_t addr_end = (addr + max_inline) &
+ ~(RTE_CACHE_LINE_SIZE - 1);
+ uint16_t copy_b = ((addr_end - addr) > length) ?
+ length :
+ (addr_end - addr);
+
+ rte_memcpy((void *)raw, (void *)addr, copy_b);
+ addr += copy_b;
+ length -= copy_b;
+ pkt_inline_sz += copy_b;
+ /* Sanity check. */
+ assert(addr <= addr_end);
+ }
+ /* Store the inlined packet size in the WQE. */
+ wqe->wqe.eseg.inline_hdr_sz = htons(pkt_inline_sz);
+ /*
+ * 2 DWORDs consumed by the WQE header + 1 DSEG +
+ * the size of the inline part of the packet.
+ */
+ ds = 2 + ((pkt_inline_sz - 2 + 15) / 16);
+ if (length > 0) {
+ dseg = (struct mlx5_wqe_data_seg *)
+ ((uintptr_t)wqe + (ds * 16));
+ if ((uintptr_t)dseg >= end)
+ dseg = (struct mlx5_wqe_data_seg *)
+ ((uintptr_t)&(*txq->wqes)[0]);
+ goto use_dseg;
+ }
+ } else {
+ /* Add the remaining packet as a simple ds. */
+ ds = 3;
+ /*
+ * No inline has been done in the packet, only the Ethernet
+ * Header as been stored.
+ */
+ wqe->wqe.eseg.inline_hdr_sz = htons(16);
+ dseg = (struct mlx5_wqe_data_seg *)
+ ((uintptr_t)wqe + (ds * 16));
+use_dseg:
+ *dseg = (struct mlx5_wqe_data_seg) {
+ .addr = htonll(addr),
+ .byte_count = htonl(length),
+ .lkey = txq_mp2mr(txq, txq_mb2mp(buf)),
+ };
+ ++ds;
}
- assert(size < 64);
- wqe->inl.ctrl.data[0] = htonl((txq->wqe_ci << 8) | MLX5_OPCODE_SEND);
- wqe->inl.ctrl.data[1] = htonl(txq->qp_num_8s | size);
- wqe->inl.ctrl.data[2] = 0;
- wqe->inl.ctrl.data[3] = 0;
- wqe->inl.eseg.rsvd0 = 0;
- wqe->inl.eseg.rsvd1 = 0;
- wqe->inl.eseg.mss = 0;
- wqe->inl.eseg.rsvd2 = 0;
- wqe->inl.eseg.inline_hdr_sz = htons(MLX5_ETH_VLAN_INLINE_HEADER_SIZE);
- /* Increment consumer index. */
- txq->wqe_ci = wqe_ci;
+ wqe->wqe.ctrl.data[1] = htonl(txq->qp_num_8s | ds);
+ return ds;
}
/**
struct rte_mbuf *buf = *(pkts++);
unsigned int elts_head_next;
uint32_t length;
- uint32_t lkey;
unsigned int segs_n = buf->nb_segs;
volatile struct mlx5_wqe_data_seg *dseg;
unsigned int ds = sizeof(*wqe) / 16;
--pkts_n;
elts_head_next = (elts_head + 1) & (elts_n - 1);
wqe = &(*txq->wqes)[txq->wqe_ci & (txq->wqe_n - 1)];
- dseg = &wqe->wqe.dseg;
- rte_prefetch0(wqe);
+ tx_prefetch_wqe(txq, txq->wqe_ci);
+ tx_prefetch_wqe(txq, txq->wqe_ci + 1);
if (pkts_n)
rte_prefetch0(*pkts);
length = DATA_LEN(buf);
if (pkts_n)
rte_prefetch0(rte_pktmbuf_mtod(*pkts,
volatile void *));
- /* Retrieve Memory Region key for this memory pool. */
- lkey = txq_mp2mr(txq, txq_mb2mp(buf));
- mlx5_wqe_write(txq, wqe, buf, length, lkey);
/* Should we enable HW CKSUM offload */
if (buf->ol_flags &
(PKT_TX_IP_CKSUM | PKT_TX_TCP_CKSUM | PKT_TX_UDP_CKSUM)) {
} else {
wqe->wqe.eseg.cs_flags = 0;
}
+ ds = mlx5_wqe_write(txq, wqe, buf, length);
+ if (segs_n == 1)
+ goto skip_segs;
+ dseg = (volatile struct mlx5_wqe_data_seg *)
+ (((uintptr_t)wqe) + ds * 16);
while (--segs_n) {
/*
* Spill on next WQE when the current one does not have
/* Update DS field in WQE. */
wqe->wqe.ctrl.data[1] &= htonl(0xffffffc0);
wqe->wqe.ctrl.data[1] |= htonl(ds & 0x3f);
- elts_head = elts_head_next;
+skip_segs:
#ifdef MLX5_PMD_SOFT_COUNTERS
/* Increment sent bytes counter. */
txq->stats.obytes += length;
#endif
+ /* Increment consumer index. */
+ txq->wqe_ci += (ds + 3) / 4;
elts_head = elts_head_next;
++i;
} while (pkts_n);
return i;
}
-/**
- * DPDK callback for TX with inline support.
- *
- * @param dpdk_txq
- * Generic pointer to TX queue structure.
- * @param[in] pkts
- * Packets to transmit.
- * @param pkts_n
- * Number of packets in array.
- *
- * @return
- * Number of packets successfully transmitted (<= pkts_n).
- */
-uint16_t
-mlx5_tx_burst_inline(void *dpdk_txq, struct rte_mbuf **pkts, uint16_t pkts_n)
-{
- struct txq *txq = (struct txq *)dpdk_txq;
- uint16_t elts_head = txq->elts_head;
- const unsigned int elts_n = txq->elts_n;
- unsigned int i = 0;
- unsigned int j = 0;
- unsigned int max;
- unsigned int comp;
- volatile union mlx5_wqe *wqe = NULL;
- unsigned int max_inline = txq->max_inline;
-
- if (unlikely(!pkts_n))
- return 0;
- /* Prefetch first packet cacheline. */
- tx_prefetch_cqe(txq, txq->cq_ci);
- tx_prefetch_cqe(txq, txq->cq_ci + 1);
- rte_prefetch0(*pkts);
- /* Start processing. */
- txq_complete(txq);
- max = (elts_n - (elts_head - txq->elts_tail));
- if (max > elts_n)
- max -= elts_n;
- do {
- struct rte_mbuf *buf = *(pkts++);
- unsigned int elts_head_next;
- uintptr_t addr;
- uint32_t length;
- uint32_t lkey;
- unsigned int segs_n = buf->nb_segs;
- volatile struct mlx5_wqe_data_seg *dseg;
- unsigned int ds = sizeof(*wqe) / 16;
-
- /*
- * Make sure there is enough room to store this packet and
- * that one ring entry remains unused.
- */
- assert(segs_n);
- if (max < segs_n + 1)
- break;
- max -= segs_n;
- --pkts_n;
- elts_head_next = (elts_head + 1) & (elts_n - 1);
- wqe = &(*txq->wqes)[txq->wqe_ci & (txq->wqe_n - 1)];
- dseg = &wqe->wqe.dseg;
- tx_prefetch_wqe(txq, txq->wqe_ci);
- tx_prefetch_wqe(txq, txq->wqe_ci + 1);
- if (pkts_n)
- rte_prefetch0(*pkts);
- /* Should we enable HW CKSUM offload */
- if (buf->ol_flags &
- (PKT_TX_IP_CKSUM | PKT_TX_TCP_CKSUM | PKT_TX_UDP_CKSUM)) {
- wqe->inl.eseg.cs_flags =
- MLX5_ETH_WQE_L3_CSUM |
- MLX5_ETH_WQE_L4_CSUM;
- } else {
- wqe->inl.eseg.cs_flags = 0;
- }
- /* Retrieve buffer information. */
- addr = rte_pktmbuf_mtod(buf, uintptr_t);
- length = DATA_LEN(buf);
- /* Update element. */
- (*txq->elts)[elts_head] = buf;
- /* Prefetch next buffer data. */
- if (pkts_n)
- rte_prefetch0(rte_pktmbuf_mtod(*pkts,
- volatile void *));
- if ((length <= max_inline) && (segs_n == 1)) {
- if (buf->ol_flags & PKT_TX_VLAN_PKT)
- mlx5_wqe_write_inline_vlan(txq, wqe,
- addr, length,
- buf->vlan_tci);
- else
- mlx5_wqe_write_inline(txq, wqe, addr, length);
- goto skip_segs;
- } else {
- /* Retrieve Memory Region key for this memory pool. */
- lkey = txq_mp2mr(txq, txq_mb2mp(buf));
- mlx5_wqe_write(txq, wqe, buf, length, lkey);
- }
- while (--segs_n) {
- /*
- * Spill on next WQE when the current one does not have
- * enough room left. Size of WQE must a be a multiple
- * of data segment size.
- */
- assert(!(sizeof(*wqe) % sizeof(*dseg)));
- if (!(ds % (sizeof(*wqe) / 16)))
- dseg = (volatile void *)
- &(*txq->wqes)[txq->wqe_ci++ &
- (txq->wqe_n - 1)];
- else
- ++dseg;
- ++ds;
- buf = buf->next;
- assert(buf);
- /* Store segment information. */
- dseg->byte_count = htonl(DATA_LEN(buf));
- dseg->lkey = txq_mp2mr(txq, txq_mb2mp(buf));
- dseg->addr = htonll(rte_pktmbuf_mtod(buf, uintptr_t));
- (*txq->elts)[elts_head_next] = buf;
- elts_head_next = (elts_head_next + 1) & (elts_n - 1);
-#ifdef MLX5_PMD_SOFT_COUNTERS
- length += DATA_LEN(buf);
-#endif
- ++j;
- }
- /* Update DS field in WQE. */
- wqe->inl.ctrl.data[1] &= htonl(0xffffffc0);
- wqe->inl.ctrl.data[1] |= htonl(ds & 0x3f);
-skip_segs:
- elts_head = elts_head_next;
-#ifdef MLX5_PMD_SOFT_COUNTERS
- /* Increment sent bytes counter. */
- txq->stats.obytes += length;
-#endif
- ++i;
- } while (pkts_n);
- /* Take a shortcut if nothing must be sent. */
- if (unlikely(i == 0))
- return 0;
- /* Check whether completion threshold has been reached. */
- comp = txq->elts_comp + i + j;
- if (comp >= MLX5_TX_COMP_THRESH) {
- /* Request completion on last WQE. */
- wqe->inl.ctrl.data[2] = htonl(8);
- /* Save elts_head in unused "immediate" field of WQE. */
- wqe->inl.ctrl.data[3] = elts_head;
- txq->elts_comp = 0;
- } else {
- txq->elts_comp = comp;
- }
-#ifdef MLX5_PMD_SOFT_COUNTERS
- /* Increment sent packets counter. */
- txq->stats.opackets += i;
-#endif
- /* Ring QP doorbell. */
- mlx5_tx_dbrec(txq);
- txq->elts_head = elts_head;
- return i;
-}
-
/**
* Open a MPW session.
*
unsigned int j = 0;
unsigned int max;
unsigned int comp;
- unsigned int inline_room = txq->max_inline;
+ unsigned int inline_room = txq->max_inline * RTE_CACHE_LINE_SIZE;
struct mlx5_mpw mpw = {
.state = MLX5_MPW_STATE_CLOSED,
};
(length > inline_room) ||
(mpw.wqe->mpw_inl.eseg.cs_flags != cs_flags)) {
mlx5_mpw_inline_close(txq, &mpw);
- inline_room = txq->max_inline;
+ inline_room =
+ txq->max_inline * RTE_CACHE_LINE_SIZE;
}
}
if (mpw.state == MLX5_MPW_STATE_CLOSED) {
/* Multi-segment packets must be alone in their MPW. */
assert((segs_n == 1) || (mpw.pkts_n == 0));
if (mpw.state == MLX5_MPW_STATE_OPENED) {
- assert(inline_room == txq->max_inline);
+ assert(inline_room ==
+ txq->max_inline * RTE_CACHE_LINE_SIZE);
#if defined(MLX5_PMD_SOFT_COUNTERS) || !defined(NDEBUG)
length = 0;
#endif
++j;
if (mpw.pkts_n == MLX5_MPW_DSEG_MAX) {
mlx5_mpw_inline_close(txq, &mpw);
- inline_room = txq->max_inline;
+ inline_room =
+ txq->max_inline * RTE_CACHE_LINE_SIZE;
} else {
inline_room -= length;
}
git.droids-corp.org / dpdk.git / commitdiff