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/*-
* BSD LICENSE
*
* Copyright(c) Broadcom Limited.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Broadcom Corporation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <inttypes.h>
#include <rte_byteorder.h>
#include <rte_malloc.h>
#include "bnxt.h"
#include "bnxt_cpr.h"
#include "bnxt_ring.h"
#include "bnxt_txq.h"
#include "bnxt_txr.h"
#include "hsi_struct_def_dpdk.h"
#include <stdbool.h>
/*
* TX Ring handling
*/
void bnxt_free_tx_rings(struct bnxt *bp)
{
int i;
for (i = 0; i < (int)bp->tx_nr_rings; i++) {
struct bnxt_tx_queue *txq = bp->tx_queues[i];
if (!txq)
continue;
bnxt_free_ring(txq->tx_ring->tx_ring_struct);
rte_free(txq->tx_ring->tx_ring_struct);
rte_free(txq->tx_ring);
bnxt_free_ring(txq->cp_ring->cp_ring_struct);
rte_free(txq->cp_ring->cp_ring_struct);
rte_free(txq->cp_ring);
rte_free(txq);
bp->tx_queues[i] = NULL;
}
}
int bnxt_init_one_tx_ring(struct bnxt_tx_queue *txq)
{
struct bnxt_tx_ring_info *txr = txq->tx_ring;
struct bnxt_ring *ring = txr->tx_ring_struct;
txq->tx_wake_thresh = ring->ring_size / 2;
ring->fw_ring_id = INVALID_HW_RING_ID;
return 0;
}
int bnxt_init_tx_ring_struct(struct bnxt_tx_queue *txq, unsigned int socket_id)
{
struct bnxt_cp_ring_info *cpr;
struct bnxt_tx_ring_info *txr;
struct bnxt_ring *ring;
txr = rte_zmalloc_socket("bnxt_tx_ring",
sizeof(struct bnxt_tx_ring_info),
RTE_CACHE_LINE_SIZE, socket_id);
if (txr == NULL)
return -ENOMEM;
txq->tx_ring = txr;
ring = rte_zmalloc_socket("bnxt_tx_ring_struct",
sizeof(struct bnxt_ring),
RTE_CACHE_LINE_SIZE, socket_id);
if (ring == NULL)
return -ENOMEM;
txr->tx_ring_struct = ring;
ring->ring_size = rte_align32pow2(txq->nb_tx_desc + 1);
ring->ring_mask = ring->ring_size - 1;
ring->bd = (void *)txr->tx_desc_ring;
ring->bd_dma = txr->tx_desc_mapping;
ring->vmem_size = ring->ring_size * sizeof(struct bnxt_sw_tx_bd);
ring->vmem = (void **)&txr->tx_buf_ring;
cpr = rte_zmalloc_socket("bnxt_tx_ring",
sizeof(struct bnxt_cp_ring_info),
RTE_CACHE_LINE_SIZE, socket_id);
if (cpr == NULL)
return -ENOMEM;
txq->cp_ring = cpr;
ring = rte_zmalloc_socket("bnxt_tx_ring_struct",
sizeof(struct bnxt_ring),
RTE_CACHE_LINE_SIZE, socket_id);
if (ring == NULL)
return -ENOMEM;
cpr->cp_ring_struct = ring;
ring->ring_size = txr->tx_ring_struct->ring_size;
ring->ring_mask = ring->ring_size - 1;
ring->bd = (void *)cpr->cp_desc_ring;
ring->bd_dma = cpr->cp_desc_mapping;
ring->vmem_size = 0;
ring->vmem = NULL;
return 0;
}
static inline uint32_t bnxt_tx_avail(struct bnxt_tx_ring_info *txr)
{
/* Tell compiler to fetch tx indices from memory. */
rte_compiler_barrier();
return txr->tx_ring_struct->ring_size -
((txr->tx_prod - txr->tx_cons) &
txr->tx_ring_struct->ring_mask) - 1;
}
static uint16_t bnxt_start_xmit(struct rte_mbuf *tx_pkt,
struct bnxt_tx_queue *txq)
{
struct bnxt_tx_ring_info *txr = txq->tx_ring;
struct tx_bd_long *txbd;
struct tx_bd_long_hi *txbd1;
uint32_t vlan_tag_flags, cfa_action;
bool long_bd = false;
uint16_t last_prod = 0;
struct rte_mbuf *m_seg;
struct bnxt_sw_tx_bd *tx_buf;
static const uint32_t lhint_arr[4] = {
TX_BD_LONG_FLAGS_LHINT_LT512,
TX_BD_LONG_FLAGS_LHINT_LT1K,
TX_BD_LONG_FLAGS_LHINT_LT2K,
TX_BD_LONG_FLAGS_LHINT_LT2K
};
if (tx_pkt->ol_flags & (PKT_TX_TCP_SEG | PKT_TX_TCP_CKSUM |
PKT_TX_UDP_CKSUM | PKT_TX_IP_CKSUM |
PKT_TX_VLAN_PKT | PKT_TX_OUTER_IP_CKSUM))
long_bd = true;
tx_buf = &txr->tx_buf_ring[txr->tx_prod];
tx_buf->mbuf = tx_pkt;
tx_buf->nr_bds = long_bd + tx_pkt->nb_segs;
last_prod = (txr->tx_prod + tx_buf->nr_bds - 1) &
txr->tx_ring_struct->ring_mask;
if (unlikely(bnxt_tx_avail(txr) < tx_buf->nr_bds))
return -ENOMEM;
txbd = &txr->tx_desc_ring[txr->tx_prod];
txbd->opaque = txr->tx_prod;
txbd->flags_type = tx_buf->nr_bds << TX_BD_LONG_FLAGS_BD_CNT_SFT;
txbd->len = tx_pkt->data_len;
if (txbd->len >= 2014)
txbd->flags_type |= TX_BD_LONG_FLAGS_LHINT_GTE2K;
else
txbd->flags_type |= lhint_arr[txbd->len >> 9];
txbd->addr = rte_cpu_to_le_32(RTE_MBUF_DATA_DMA_ADDR(tx_buf->mbuf));
if (long_bd) {
txbd->flags_type |= TX_BD_LONG_TYPE_TX_BD_LONG;
vlan_tag_flags = 0;
cfa_action = 0;
if (tx_buf->mbuf->ol_flags & PKT_TX_VLAN_PKT) {
/* shurd: Should this mask at
* TX_BD_LONG_CFA_META_VLAN_VID_MASK?
*/
vlan_tag_flags = TX_BD_LONG_CFA_META_KEY_VLAN_TAG |
tx_buf->mbuf->vlan_tci;
/* Currently supports 8021Q, 8021AD vlan offloads
* QINQ1, QINQ2, QINQ3 vlan headers are deprecated
*/
/* DPDK only supports 802.11q VLAN packets */
vlan_tag_flags |=
TX_BD_LONG_CFA_META_VLAN_TPID_TPID8100;
}
txr->tx_prod = RING_NEXT(txr->tx_ring_struct, txr->tx_prod);
txbd1 = (struct tx_bd_long_hi *)
&txr->tx_desc_ring[txr->tx_prod];
txbd1->lflags = 0;
txbd1->cfa_meta = vlan_tag_flags;
txbd1->cfa_action = cfa_action;
if (tx_pkt->ol_flags & PKT_TX_TCP_SEG) {
/* TSO */
txbd1->lflags |= TX_BD_LONG_LFLAGS_LSO;
txbd1->hdr_size = tx_pkt->l2_len + tx_pkt->l3_len +
tx_pkt->l4_len + tx_pkt->outer_l2_len +
tx_pkt->outer_l3_len;
txbd1->mss = tx_pkt->tso_segsz;
} else if (tx_pkt->ol_flags & PKT_TX_OIP_IIP_TCP_UDP_CKSUM) {
/* Outer IP, Inner IP, Inner TCP/UDP CSO */
txbd1->lflags |= TX_BD_FLG_TIP_IP_TCP_UDP_CHKSUM;
txbd1->mss = 0;
} else if (tx_pkt->ol_flags & PKT_TX_IIP_TCP_UDP_CKSUM) {
/* (Inner) IP, (Inner) TCP/UDP CSO */
txbd1->lflags |= TX_BD_FLG_IP_TCP_UDP_CHKSUM;
txbd1->mss = 0;
} else if (tx_pkt->ol_flags & PKT_TX_OIP_TCP_UDP_CKSUM) {
/* Outer IP, (Inner) TCP/UDP CSO */
txbd1->lflags |= TX_BD_FLG_TIP_TCP_UDP_CHKSUM;
txbd1->mss = 0;
} else if (tx_pkt->ol_flags & PKT_TX_OIP_IIP_CKSUM) {
/* Outer IP, Inner IP CSO */
txbd1->lflags |= TX_BD_FLG_TIP_IP_CHKSUM;
txbd1->mss = 0;
} else if (tx_pkt->ol_flags & PKT_TX_TCP_UDP_CKSUM) {
/* TCP/UDP CSO */
txbd1->lflags |= TX_BD_LONG_LFLAGS_TCP_UDP_CHKSUM;
txbd1->mss = 0;
} else if (tx_pkt->ol_flags & PKT_TX_IP_CKSUM) {
/* IP CSO */
txbd1->lflags |= TX_BD_LONG_LFLAGS_IP_CHKSUM;
txbd1->mss = 0;
} else if (tx_pkt->ol_flags & PKT_TX_OUTER_IP_CKSUM) {
/* IP CSO */
txbd1->lflags |= TX_BD_LONG_LFLAGS_T_IP_CHKSUM;
txbd1->mss = 0;
}
} else {
txbd->flags_type |= TX_BD_SHORT_TYPE_TX_BD_SHORT;
}
m_seg = tx_pkt->next;
/* i is set at the end of the if(long_bd) block */
while (txr->tx_prod != last_prod) {
txr->tx_prod = RING_NEXT(txr->tx_ring_struct, txr->tx_prod);
tx_buf = &txr->tx_buf_ring[txr->tx_prod];
txbd = &txr->tx_desc_ring[txr->tx_prod];
txbd->addr = rte_cpu_to_le_32(RTE_MBUF_DATA_DMA_ADDR(m_seg));
txbd->flags_type = TX_BD_SHORT_TYPE_TX_BD_SHORT;
txbd->len = m_seg->data_len;
m_seg = m_seg->next;
}
txbd->flags_type |= TX_BD_LONG_FLAGS_PACKET_END;
txr->tx_prod = RING_NEXT(txr->tx_ring_struct, txr->tx_prod);
return 0;
}
static void bnxt_tx_cmp(struct bnxt_tx_queue *txq, int nr_pkts)
{
struct bnxt_tx_ring_info *txr = txq->tx_ring;
uint16_t cons = txr->tx_cons;
int i, j;
for (i = 0; i < nr_pkts; i++) {
struct bnxt_sw_tx_bd *tx_buf;
struct rte_mbuf *mbuf;
tx_buf = &txr->tx_buf_ring[cons];
cons = RING_NEXT(txr->tx_ring_struct, cons);
mbuf = tx_buf->mbuf;
tx_buf->mbuf = NULL;
/* EW - no need to unmap DMA memory? */
for (j = 1; j < tx_buf->nr_bds; j++)
cons = RING_NEXT(txr->tx_ring_struct, cons);
rte_pktmbuf_free(mbuf);
}
txr->tx_cons = cons;
}
static int bnxt_handle_tx_cp(struct bnxt_tx_queue *txq)
{
struct bnxt_cp_ring_info *cpr = txq->cp_ring;
uint32_t raw_cons = cpr->cp_raw_cons;
uint32_t cons;
int nb_tx_pkts = 0;
struct tx_cmpl *txcmp;
if ((txq->tx_ring->tx_ring_struct->ring_size -
(bnxt_tx_avail(txq->tx_ring))) >
txq->tx_free_thresh) {
while (1) {
cons = RING_CMP(cpr->cp_ring_struct, raw_cons);
txcmp = (struct tx_cmpl *)&cpr->cp_desc_ring[cons];
if (!CMP_VALID(txcmp, raw_cons, cpr->cp_ring_struct))
break;
cpr->valid = FLIP_VALID(cons,
cpr->cp_ring_struct->ring_mask,
cpr->valid);
if (CMP_TYPE(txcmp) == TX_CMPL_TYPE_TX_L2)
nb_tx_pkts++;
else
RTE_LOG_DP(DEBUG, PMD,
"Unhandled CMP type %02x\n",
CMP_TYPE(txcmp));
raw_cons = NEXT_RAW_CMP(raw_cons);
}
if (nb_tx_pkts)
bnxt_tx_cmp(txq, nb_tx_pkts);
cpr->cp_raw_cons = raw_cons;
B_CP_DIS_DB(cpr, cpr->cp_raw_cons);
}
return nb_tx_pkts;
}
uint16_t bnxt_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts,
uint16_t nb_pkts)
{
struct bnxt_tx_queue *txq = tx_queue;
uint16_t nb_tx_pkts = 0;
uint16_t db_mask = txq->tx_ring->tx_ring_struct->ring_size >> 2;
uint16_t last_db_mask = 0;
/* Handle TX completions */
bnxt_handle_tx_cp(txq);
/* Handle TX burst request */
for (nb_tx_pkts = 0; nb_tx_pkts < nb_pkts; nb_tx_pkts++) {
if (bnxt_start_xmit(tx_pkts[nb_tx_pkts], txq)) {
break;
} else if ((nb_tx_pkts & db_mask) != last_db_mask) {
B_TX_DB(txq->tx_ring->tx_doorbell,
txq->tx_ring->tx_prod);
last_db_mask = nb_tx_pkts & db_mask;
}
}
if (nb_tx_pkts)
B_TX_DB(txq->tx_ring->tx_doorbell, txq->tx_ring->tx_prod);
return nb_tx_pkts;
}
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